Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Paul Fulghum | 7f3edb9 | 2005-09-09 13:02:14 -0700 | [diff] [blame] | 2 | * $Id: synclinkmp.c,v 4.38 2005/07/15 13:29:44 paulkf Exp $ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * |
| 4 | * Device driver for Microgate SyncLink Multiport |
| 5 | * high speed multiprotocol serial adapter. |
| 6 | * |
| 7 | * written by Paul Fulghum for Microgate Corporation |
| 8 | * paulkf@microgate.com |
| 9 | * |
| 10 | * Microgate and SyncLink are trademarks of Microgate Corporation |
| 11 | * |
| 12 | * Derived from serial.c written by Theodore Ts'o and Linus Torvalds |
| 13 | * This code is released under the GNU General Public License (GPL) |
| 14 | * |
| 15 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| 16 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 17 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| 18 | * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, |
| 19 | * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| 20 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
| 21 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 22 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| 23 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 24 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
| 25 | * OF THE POSSIBILITY OF SUCH DAMAGE. |
| 26 | */ |
| 27 | |
| 28 | #define VERSION(ver,rel,seq) (((ver)<<16) | ((rel)<<8) | (seq)) |
| 29 | #if defined(__i386__) |
| 30 | # define BREAKPOINT() asm(" int $3"); |
| 31 | #else |
| 32 | # define BREAKPOINT() { } |
| 33 | #endif |
| 34 | |
| 35 | #define MAX_DEVICES 12 |
| 36 | |
| 37 | #include <linux/config.h> |
| 38 | #include <linux/module.h> |
| 39 | #include <linux/errno.h> |
| 40 | #include <linux/signal.h> |
| 41 | #include <linux/sched.h> |
| 42 | #include <linux/timer.h> |
| 43 | #include <linux/interrupt.h> |
| 44 | #include <linux/pci.h> |
| 45 | #include <linux/tty.h> |
| 46 | #include <linux/tty_flip.h> |
| 47 | #include <linux/serial.h> |
| 48 | #include <linux/major.h> |
| 49 | #include <linux/string.h> |
| 50 | #include <linux/fcntl.h> |
| 51 | #include <linux/ptrace.h> |
| 52 | #include <linux/ioport.h> |
| 53 | #include <linux/mm.h> |
| 54 | #include <linux/slab.h> |
| 55 | #include <linux/netdevice.h> |
| 56 | #include <linux/vmalloc.h> |
| 57 | #include <linux/init.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | #include <linux/delay.h> |
| 59 | #include <linux/ioctl.h> |
| 60 | |
| 61 | #include <asm/system.h> |
| 62 | #include <asm/io.h> |
| 63 | #include <asm/irq.h> |
| 64 | #include <asm/dma.h> |
| 65 | #include <linux/bitops.h> |
| 66 | #include <asm/types.h> |
| 67 | #include <linux/termios.h> |
| 68 | #include <linux/workqueue.h> |
| 69 | #include <linux/hdlc.h> |
| 70 | |
| 71 | #ifdef CONFIG_HDLC_MODULE |
| 72 | #define CONFIG_HDLC 1 |
| 73 | #endif |
| 74 | |
| 75 | #define GET_USER(error,value,addr) error = get_user(value,addr) |
| 76 | #define COPY_FROM_USER(error,dest,src,size) error = copy_from_user(dest,src,size) ? -EFAULT : 0 |
| 77 | #define PUT_USER(error,value,addr) error = put_user(value,addr) |
| 78 | #define COPY_TO_USER(error,dest,src,size) error = copy_to_user(dest,src,size) ? -EFAULT : 0 |
| 79 | |
| 80 | #include <asm/uaccess.h> |
| 81 | |
| 82 | #include "linux/synclink.h" |
| 83 | |
| 84 | static MGSL_PARAMS default_params = { |
| 85 | MGSL_MODE_HDLC, /* unsigned long mode */ |
| 86 | 0, /* unsigned char loopback; */ |
| 87 | HDLC_FLAG_UNDERRUN_ABORT15, /* unsigned short flags; */ |
| 88 | HDLC_ENCODING_NRZI_SPACE, /* unsigned char encoding; */ |
| 89 | 0, /* unsigned long clock_speed; */ |
| 90 | 0xff, /* unsigned char addr_filter; */ |
| 91 | HDLC_CRC_16_CCITT, /* unsigned short crc_type; */ |
| 92 | HDLC_PREAMBLE_LENGTH_8BITS, /* unsigned char preamble_length; */ |
| 93 | HDLC_PREAMBLE_PATTERN_NONE, /* unsigned char preamble; */ |
| 94 | 9600, /* unsigned long data_rate; */ |
| 95 | 8, /* unsigned char data_bits; */ |
| 96 | 1, /* unsigned char stop_bits; */ |
| 97 | ASYNC_PARITY_NONE /* unsigned char parity; */ |
| 98 | }; |
| 99 | |
| 100 | /* size in bytes of DMA data buffers */ |
| 101 | #define SCABUFSIZE 1024 |
| 102 | #define SCA_MEM_SIZE 0x40000 |
| 103 | #define SCA_BASE_SIZE 512 |
| 104 | #define SCA_REG_SIZE 16 |
| 105 | #define SCA_MAX_PORTS 4 |
| 106 | #define SCAMAXDESC 128 |
| 107 | |
| 108 | #define BUFFERLISTSIZE 4096 |
| 109 | |
| 110 | /* SCA-I style DMA buffer descriptor */ |
| 111 | typedef struct _SCADESC |
| 112 | { |
| 113 | u16 next; /* lower l6 bits of next descriptor addr */ |
| 114 | u16 buf_ptr; /* lower 16 bits of buffer addr */ |
| 115 | u8 buf_base; /* upper 8 bits of buffer addr */ |
| 116 | u8 pad1; |
| 117 | u16 length; /* length of buffer */ |
| 118 | u8 status; /* status of buffer */ |
| 119 | u8 pad2; |
| 120 | } SCADESC, *PSCADESC; |
| 121 | |
| 122 | typedef struct _SCADESC_EX |
| 123 | { |
| 124 | /* device driver bookkeeping section */ |
| 125 | char *virt_addr; /* virtual address of data buffer */ |
| 126 | u16 phys_entry; /* lower 16-bits of physical address of this descriptor */ |
| 127 | } SCADESC_EX, *PSCADESC_EX; |
| 128 | |
| 129 | /* The queue of BH actions to be performed */ |
| 130 | |
| 131 | #define BH_RECEIVE 1 |
| 132 | #define BH_TRANSMIT 2 |
| 133 | #define BH_STATUS 4 |
| 134 | |
| 135 | #define IO_PIN_SHUTDOWN_LIMIT 100 |
| 136 | |
| 137 | #define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK)) |
| 138 | |
| 139 | struct _input_signal_events { |
| 140 | int ri_up; |
| 141 | int ri_down; |
| 142 | int dsr_up; |
| 143 | int dsr_down; |
| 144 | int dcd_up; |
| 145 | int dcd_down; |
| 146 | int cts_up; |
| 147 | int cts_down; |
| 148 | }; |
| 149 | |
| 150 | /* |
| 151 | * Device instance data structure |
| 152 | */ |
| 153 | typedef struct _synclinkmp_info { |
| 154 | void *if_ptr; /* General purpose pointer (used by SPPP) */ |
| 155 | int magic; |
| 156 | int flags; |
| 157 | int count; /* count of opens */ |
| 158 | int line; |
| 159 | unsigned short close_delay; |
| 160 | unsigned short closing_wait; /* time to wait before closing */ |
| 161 | |
| 162 | struct mgsl_icount icount; |
| 163 | |
| 164 | struct tty_struct *tty; |
| 165 | int timeout; |
| 166 | int x_char; /* xon/xoff character */ |
| 167 | int blocked_open; /* # of blocked opens */ |
| 168 | u16 read_status_mask1; /* break detection (SR1 indications) */ |
| 169 | u16 read_status_mask2; /* parity/framing/overun (SR2 indications) */ |
| 170 | unsigned char ignore_status_mask1; /* break detection (SR1 indications) */ |
| 171 | unsigned char ignore_status_mask2; /* parity/framing/overun (SR2 indications) */ |
| 172 | unsigned char *tx_buf; |
| 173 | int tx_put; |
| 174 | int tx_get; |
| 175 | int tx_count; |
| 176 | |
| 177 | wait_queue_head_t open_wait; |
| 178 | wait_queue_head_t close_wait; |
| 179 | |
| 180 | wait_queue_head_t status_event_wait_q; |
| 181 | wait_queue_head_t event_wait_q; |
| 182 | struct timer_list tx_timer; /* HDLC transmit timeout timer */ |
| 183 | struct _synclinkmp_info *next_device; /* device list link */ |
| 184 | struct timer_list status_timer; /* input signal status check timer */ |
| 185 | |
| 186 | spinlock_t lock; /* spinlock for synchronizing with ISR */ |
| 187 | struct work_struct task; /* task structure for scheduling bh */ |
| 188 | |
| 189 | u32 max_frame_size; /* as set by device config */ |
| 190 | |
| 191 | u32 pending_bh; |
| 192 | |
| 193 | int bh_running; /* Protection from multiple */ |
| 194 | int isr_overflow; |
| 195 | int bh_requested; |
| 196 | |
| 197 | int dcd_chkcount; /* check counts to prevent */ |
| 198 | int cts_chkcount; /* too many IRQs if a signal */ |
| 199 | int dsr_chkcount; /* is floating */ |
| 200 | int ri_chkcount; |
| 201 | |
| 202 | char *buffer_list; /* virtual address of Rx & Tx buffer lists */ |
| 203 | unsigned long buffer_list_phys; |
| 204 | |
| 205 | unsigned int rx_buf_count; /* count of total allocated Rx buffers */ |
| 206 | SCADESC *rx_buf_list; /* list of receive buffer entries */ |
| 207 | SCADESC_EX rx_buf_list_ex[SCAMAXDESC]; /* list of receive buffer entries */ |
| 208 | unsigned int current_rx_buf; |
| 209 | |
| 210 | unsigned int tx_buf_count; /* count of total allocated Tx buffers */ |
| 211 | SCADESC *tx_buf_list; /* list of transmit buffer entries */ |
| 212 | SCADESC_EX tx_buf_list_ex[SCAMAXDESC]; /* list of transmit buffer entries */ |
| 213 | unsigned int last_tx_buf; |
| 214 | |
| 215 | unsigned char *tmp_rx_buf; |
| 216 | unsigned int tmp_rx_buf_count; |
| 217 | |
| 218 | int rx_enabled; |
| 219 | int rx_overflow; |
| 220 | |
| 221 | int tx_enabled; |
| 222 | int tx_active; |
| 223 | u32 idle_mode; |
| 224 | |
| 225 | unsigned char ie0_value; |
| 226 | unsigned char ie1_value; |
| 227 | unsigned char ie2_value; |
| 228 | unsigned char ctrlreg_value; |
| 229 | unsigned char old_signals; |
| 230 | |
| 231 | char device_name[25]; /* device instance name */ |
| 232 | |
| 233 | int port_count; |
| 234 | int adapter_num; |
| 235 | int port_num; |
| 236 | |
| 237 | struct _synclinkmp_info *port_array[SCA_MAX_PORTS]; |
| 238 | |
| 239 | unsigned int bus_type; /* expansion bus type (ISA,EISA,PCI) */ |
| 240 | |
| 241 | unsigned int irq_level; /* interrupt level */ |
| 242 | unsigned long irq_flags; |
| 243 | int irq_requested; /* nonzero if IRQ requested */ |
| 244 | |
| 245 | MGSL_PARAMS params; /* communications parameters */ |
| 246 | |
| 247 | unsigned char serial_signals; /* current serial signal states */ |
| 248 | |
| 249 | int irq_occurred; /* for diagnostics use */ |
| 250 | unsigned int init_error; /* Initialization startup error */ |
| 251 | |
| 252 | u32 last_mem_alloc; |
| 253 | unsigned char* memory_base; /* shared memory address (PCI only) */ |
| 254 | u32 phys_memory_base; |
| 255 | int shared_mem_requested; |
| 256 | |
| 257 | unsigned char* sca_base; /* HD64570 SCA Memory address */ |
| 258 | u32 phys_sca_base; |
| 259 | u32 sca_offset; |
| 260 | int sca_base_requested; |
| 261 | |
| 262 | unsigned char* lcr_base; /* local config registers (PCI only) */ |
| 263 | u32 phys_lcr_base; |
| 264 | u32 lcr_offset; |
| 265 | int lcr_mem_requested; |
| 266 | |
| 267 | unsigned char* statctrl_base; /* status/control register memory */ |
| 268 | u32 phys_statctrl_base; |
| 269 | u32 statctrl_offset; |
| 270 | int sca_statctrl_requested; |
| 271 | |
| 272 | u32 misc_ctrl_value; |
| 273 | char flag_buf[MAX_ASYNC_BUFFER_SIZE]; |
| 274 | char char_buf[MAX_ASYNC_BUFFER_SIZE]; |
| 275 | BOOLEAN drop_rts_on_tx_done; |
| 276 | |
| 277 | struct _input_signal_events input_signal_events; |
| 278 | |
| 279 | /* SPPP/Cisco HDLC device parts */ |
| 280 | int netcount; |
| 281 | int dosyncppp; |
| 282 | spinlock_t netlock; |
| 283 | |
| 284 | #ifdef CONFIG_HDLC |
| 285 | struct net_device *netdev; |
| 286 | #endif |
| 287 | |
| 288 | } SLMP_INFO; |
| 289 | |
| 290 | #define MGSL_MAGIC 0x5401 |
| 291 | |
| 292 | /* |
| 293 | * define serial signal status change macros |
| 294 | */ |
| 295 | #define MISCSTATUS_DCD_LATCHED (SerialSignal_DCD<<8) /* indicates change in DCD */ |
| 296 | #define MISCSTATUS_RI_LATCHED (SerialSignal_RI<<8) /* indicates change in RI */ |
| 297 | #define MISCSTATUS_CTS_LATCHED (SerialSignal_CTS<<8) /* indicates change in CTS */ |
| 298 | #define MISCSTATUS_DSR_LATCHED (SerialSignal_DSR<<8) /* change in DSR */ |
| 299 | |
| 300 | /* Common Register macros */ |
| 301 | #define LPR 0x00 |
| 302 | #define PABR0 0x02 |
| 303 | #define PABR1 0x03 |
| 304 | #define WCRL 0x04 |
| 305 | #define WCRM 0x05 |
| 306 | #define WCRH 0x06 |
| 307 | #define DPCR 0x08 |
| 308 | #define DMER 0x09 |
| 309 | #define ISR0 0x10 |
| 310 | #define ISR1 0x11 |
| 311 | #define ISR2 0x12 |
| 312 | #define IER0 0x14 |
| 313 | #define IER1 0x15 |
| 314 | #define IER2 0x16 |
| 315 | #define ITCR 0x18 |
| 316 | #define INTVR 0x1a |
| 317 | #define IMVR 0x1c |
| 318 | |
| 319 | /* MSCI Register macros */ |
| 320 | #define TRB 0x20 |
| 321 | #define TRBL 0x20 |
| 322 | #define TRBH 0x21 |
| 323 | #define SR0 0x22 |
| 324 | #define SR1 0x23 |
| 325 | #define SR2 0x24 |
| 326 | #define SR3 0x25 |
| 327 | #define FST 0x26 |
| 328 | #define IE0 0x28 |
| 329 | #define IE1 0x29 |
| 330 | #define IE2 0x2a |
| 331 | #define FIE 0x2b |
| 332 | #define CMD 0x2c |
| 333 | #define MD0 0x2e |
| 334 | #define MD1 0x2f |
| 335 | #define MD2 0x30 |
| 336 | #define CTL 0x31 |
| 337 | #define SA0 0x32 |
| 338 | #define SA1 0x33 |
| 339 | #define IDL 0x34 |
| 340 | #define TMC 0x35 |
| 341 | #define RXS 0x36 |
| 342 | #define TXS 0x37 |
| 343 | #define TRC0 0x38 |
| 344 | #define TRC1 0x39 |
| 345 | #define RRC 0x3a |
| 346 | #define CST0 0x3c |
| 347 | #define CST1 0x3d |
| 348 | |
| 349 | /* Timer Register Macros */ |
| 350 | #define TCNT 0x60 |
| 351 | #define TCNTL 0x60 |
| 352 | #define TCNTH 0x61 |
| 353 | #define TCONR 0x62 |
| 354 | #define TCONRL 0x62 |
| 355 | #define TCONRH 0x63 |
| 356 | #define TMCS 0x64 |
| 357 | #define TEPR 0x65 |
| 358 | |
| 359 | /* DMA Controller Register macros */ |
| 360 | #define DARL 0x80 |
| 361 | #define DARH 0x81 |
| 362 | #define DARB 0x82 |
| 363 | #define BAR 0x80 |
| 364 | #define BARL 0x80 |
| 365 | #define BARH 0x81 |
| 366 | #define BARB 0x82 |
| 367 | #define SAR 0x84 |
| 368 | #define SARL 0x84 |
| 369 | #define SARH 0x85 |
| 370 | #define SARB 0x86 |
| 371 | #define CPB 0x86 |
| 372 | #define CDA 0x88 |
| 373 | #define CDAL 0x88 |
| 374 | #define CDAH 0x89 |
| 375 | #define EDA 0x8a |
| 376 | #define EDAL 0x8a |
| 377 | #define EDAH 0x8b |
| 378 | #define BFL 0x8c |
| 379 | #define BFLL 0x8c |
| 380 | #define BFLH 0x8d |
| 381 | #define BCR 0x8e |
| 382 | #define BCRL 0x8e |
| 383 | #define BCRH 0x8f |
| 384 | #define DSR 0x90 |
| 385 | #define DMR 0x91 |
| 386 | #define FCT 0x93 |
| 387 | #define DIR 0x94 |
| 388 | #define DCMD 0x95 |
| 389 | |
| 390 | /* combine with timer or DMA register address */ |
| 391 | #define TIMER0 0x00 |
| 392 | #define TIMER1 0x08 |
| 393 | #define TIMER2 0x10 |
| 394 | #define TIMER3 0x18 |
| 395 | #define RXDMA 0x00 |
| 396 | #define TXDMA 0x20 |
| 397 | |
| 398 | /* SCA Command Codes */ |
| 399 | #define NOOP 0x00 |
| 400 | #define TXRESET 0x01 |
| 401 | #define TXENABLE 0x02 |
| 402 | #define TXDISABLE 0x03 |
| 403 | #define TXCRCINIT 0x04 |
| 404 | #define TXCRCEXCL 0x05 |
| 405 | #define TXEOM 0x06 |
| 406 | #define TXABORT 0x07 |
| 407 | #define MPON 0x08 |
| 408 | #define TXBUFCLR 0x09 |
| 409 | #define RXRESET 0x11 |
| 410 | #define RXENABLE 0x12 |
| 411 | #define RXDISABLE 0x13 |
| 412 | #define RXCRCINIT 0x14 |
| 413 | #define RXREJECT 0x15 |
| 414 | #define SEARCHMP 0x16 |
| 415 | #define RXCRCEXCL 0x17 |
| 416 | #define RXCRCCALC 0x18 |
| 417 | #define CHRESET 0x21 |
| 418 | #define HUNT 0x31 |
| 419 | |
| 420 | /* DMA command codes */ |
| 421 | #define SWABORT 0x01 |
| 422 | #define FEICLEAR 0x02 |
| 423 | |
| 424 | /* IE0 */ |
| 425 | #define TXINTE BIT7 |
| 426 | #define RXINTE BIT6 |
| 427 | #define TXRDYE BIT1 |
| 428 | #define RXRDYE BIT0 |
| 429 | |
| 430 | /* IE1 & SR1 */ |
| 431 | #define UDRN BIT7 |
| 432 | #define IDLE BIT6 |
| 433 | #define SYNCD BIT4 |
| 434 | #define FLGD BIT4 |
| 435 | #define CCTS BIT3 |
| 436 | #define CDCD BIT2 |
| 437 | #define BRKD BIT1 |
| 438 | #define ABTD BIT1 |
| 439 | #define GAPD BIT1 |
| 440 | #define BRKE BIT0 |
| 441 | #define IDLD BIT0 |
| 442 | |
| 443 | /* IE2 & SR2 */ |
| 444 | #define EOM BIT7 |
| 445 | #define PMP BIT6 |
| 446 | #define SHRT BIT6 |
| 447 | #define PE BIT5 |
| 448 | #define ABT BIT5 |
| 449 | #define FRME BIT4 |
| 450 | #define RBIT BIT4 |
| 451 | #define OVRN BIT3 |
| 452 | #define CRCE BIT2 |
| 453 | |
| 454 | |
| 455 | /* |
| 456 | * Global linked list of SyncLink devices |
| 457 | */ |
| 458 | static SLMP_INFO *synclinkmp_device_list = NULL; |
| 459 | static int synclinkmp_adapter_count = -1; |
| 460 | static int synclinkmp_device_count = 0; |
| 461 | |
| 462 | /* |
| 463 | * Set this param to non-zero to load eax with the |
| 464 | * .text section address and breakpoint on module load. |
| 465 | * This is useful for use with gdb and add-symbol-file command. |
| 466 | */ |
| 467 | static int break_on_load=0; |
| 468 | |
| 469 | /* |
| 470 | * Driver major number, defaults to zero to get auto |
| 471 | * assigned major number. May be forced as module parameter. |
| 472 | */ |
| 473 | static int ttymajor=0; |
| 474 | |
| 475 | /* |
| 476 | * Array of user specified options for ISA adapters. |
| 477 | */ |
| 478 | static int debug_level = 0; |
| 479 | static int maxframe[MAX_DEVICES] = {0,}; |
| 480 | static int dosyncppp[MAX_DEVICES] = {0,}; |
| 481 | |
| 482 | module_param(break_on_load, bool, 0); |
| 483 | module_param(ttymajor, int, 0); |
| 484 | module_param(debug_level, int, 0); |
| 485 | module_param_array(maxframe, int, NULL, 0); |
| 486 | module_param_array(dosyncppp, int, NULL, 0); |
| 487 | |
| 488 | static char *driver_name = "SyncLink MultiPort driver"; |
Paul Fulghum | 7f3edb9 | 2005-09-09 13:02:14 -0700 | [diff] [blame] | 489 | static char *driver_version = "$Revision: 4.38 $"; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 490 | |
| 491 | static int synclinkmp_init_one(struct pci_dev *dev,const struct pci_device_id *ent); |
| 492 | static void synclinkmp_remove_one(struct pci_dev *dev); |
| 493 | |
| 494 | static struct pci_device_id synclinkmp_pci_tbl[] = { |
| 495 | { PCI_VENDOR_ID_MICROGATE, PCI_DEVICE_ID_MICROGATE_SCA, PCI_ANY_ID, PCI_ANY_ID, }, |
| 496 | { 0, }, /* terminate list */ |
| 497 | }; |
| 498 | MODULE_DEVICE_TABLE(pci, synclinkmp_pci_tbl); |
| 499 | |
| 500 | MODULE_LICENSE("GPL"); |
| 501 | |
| 502 | static struct pci_driver synclinkmp_pci_driver = { |
| 503 | .name = "synclinkmp", |
| 504 | .id_table = synclinkmp_pci_tbl, |
| 505 | .probe = synclinkmp_init_one, |
| 506 | .remove = __devexit_p(synclinkmp_remove_one), |
| 507 | }; |
| 508 | |
| 509 | |
| 510 | static struct tty_driver *serial_driver; |
| 511 | |
| 512 | /* number of characters left in xmit buffer before we ask for more */ |
| 513 | #define WAKEUP_CHARS 256 |
| 514 | |
| 515 | |
| 516 | /* tty callbacks */ |
| 517 | |
| 518 | static int open(struct tty_struct *tty, struct file * filp); |
| 519 | static void close(struct tty_struct *tty, struct file * filp); |
| 520 | static void hangup(struct tty_struct *tty); |
| 521 | static void set_termios(struct tty_struct *tty, struct termios *old_termios); |
| 522 | |
| 523 | static int write(struct tty_struct *tty, const unsigned char *buf, int count); |
| 524 | static void put_char(struct tty_struct *tty, unsigned char ch); |
| 525 | static void send_xchar(struct tty_struct *tty, char ch); |
| 526 | static void wait_until_sent(struct tty_struct *tty, int timeout); |
| 527 | static int write_room(struct tty_struct *tty); |
| 528 | static void flush_chars(struct tty_struct *tty); |
| 529 | static void flush_buffer(struct tty_struct *tty); |
| 530 | static void tx_hold(struct tty_struct *tty); |
| 531 | static void tx_release(struct tty_struct *tty); |
| 532 | |
| 533 | static int ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg); |
| 534 | static int read_proc(char *page, char **start, off_t off, int count,int *eof, void *data); |
| 535 | static int chars_in_buffer(struct tty_struct *tty); |
| 536 | static void throttle(struct tty_struct * tty); |
| 537 | static void unthrottle(struct tty_struct * tty); |
| 538 | static void set_break(struct tty_struct *tty, int break_state); |
| 539 | |
| 540 | #ifdef CONFIG_HDLC |
| 541 | #define dev_to_port(D) (dev_to_hdlc(D)->priv) |
| 542 | static void hdlcdev_tx_done(SLMP_INFO *info); |
| 543 | static void hdlcdev_rx(SLMP_INFO *info, char *buf, int size); |
| 544 | static int hdlcdev_init(SLMP_INFO *info); |
| 545 | static void hdlcdev_exit(SLMP_INFO *info); |
| 546 | #endif |
| 547 | |
| 548 | /* ioctl handlers */ |
| 549 | |
| 550 | static int get_stats(SLMP_INFO *info, struct mgsl_icount __user *user_icount); |
| 551 | static int get_params(SLMP_INFO *info, MGSL_PARAMS __user *params); |
| 552 | static int set_params(SLMP_INFO *info, MGSL_PARAMS __user *params); |
| 553 | static int get_txidle(SLMP_INFO *info, int __user *idle_mode); |
| 554 | static int set_txidle(SLMP_INFO *info, int idle_mode); |
| 555 | static int tx_enable(SLMP_INFO *info, int enable); |
| 556 | static int tx_abort(SLMP_INFO *info); |
| 557 | static int rx_enable(SLMP_INFO *info, int enable); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 558 | static int modem_input_wait(SLMP_INFO *info,int arg); |
| 559 | static int wait_mgsl_event(SLMP_INFO *info, int __user *mask_ptr); |
| 560 | static int tiocmget(struct tty_struct *tty, struct file *file); |
| 561 | static int tiocmset(struct tty_struct *tty, struct file *file, |
| 562 | unsigned int set, unsigned int clear); |
| 563 | static void set_break(struct tty_struct *tty, int break_state); |
| 564 | |
| 565 | static void add_device(SLMP_INFO *info); |
| 566 | static void device_init(int adapter_num, struct pci_dev *pdev); |
| 567 | static int claim_resources(SLMP_INFO *info); |
| 568 | static void release_resources(SLMP_INFO *info); |
| 569 | |
| 570 | static int startup(SLMP_INFO *info); |
| 571 | static int block_til_ready(struct tty_struct *tty, struct file * filp,SLMP_INFO *info); |
| 572 | static void shutdown(SLMP_INFO *info); |
| 573 | static void program_hw(SLMP_INFO *info); |
| 574 | static void change_params(SLMP_INFO *info); |
| 575 | |
| 576 | static int init_adapter(SLMP_INFO *info); |
| 577 | static int register_test(SLMP_INFO *info); |
| 578 | static int irq_test(SLMP_INFO *info); |
| 579 | static int loopback_test(SLMP_INFO *info); |
| 580 | static int adapter_test(SLMP_INFO *info); |
| 581 | static int memory_test(SLMP_INFO *info); |
| 582 | |
| 583 | static void reset_adapter(SLMP_INFO *info); |
| 584 | static void reset_port(SLMP_INFO *info); |
| 585 | static void async_mode(SLMP_INFO *info); |
| 586 | static void hdlc_mode(SLMP_INFO *info); |
| 587 | |
| 588 | static void rx_stop(SLMP_INFO *info); |
| 589 | static void rx_start(SLMP_INFO *info); |
| 590 | static void rx_reset_buffers(SLMP_INFO *info); |
| 591 | static void rx_free_frame_buffers(SLMP_INFO *info, unsigned int first, unsigned int last); |
| 592 | static int rx_get_frame(SLMP_INFO *info); |
| 593 | |
| 594 | static void tx_start(SLMP_INFO *info); |
| 595 | static void tx_stop(SLMP_INFO *info); |
| 596 | static void tx_load_fifo(SLMP_INFO *info); |
| 597 | static void tx_set_idle(SLMP_INFO *info); |
| 598 | static void tx_load_dma_buffer(SLMP_INFO *info, const char *buf, unsigned int count); |
| 599 | |
| 600 | static void get_signals(SLMP_INFO *info); |
| 601 | static void set_signals(SLMP_INFO *info); |
| 602 | static void enable_loopback(SLMP_INFO *info, int enable); |
| 603 | static void set_rate(SLMP_INFO *info, u32 data_rate); |
| 604 | |
| 605 | static int bh_action(SLMP_INFO *info); |
| 606 | static void bh_handler(void* Context); |
| 607 | static void bh_receive(SLMP_INFO *info); |
| 608 | static void bh_transmit(SLMP_INFO *info); |
| 609 | static void bh_status(SLMP_INFO *info); |
| 610 | static void isr_timer(SLMP_INFO *info); |
| 611 | static void isr_rxint(SLMP_INFO *info); |
| 612 | static void isr_rxrdy(SLMP_INFO *info); |
| 613 | static void isr_txint(SLMP_INFO *info); |
| 614 | static void isr_txrdy(SLMP_INFO *info); |
| 615 | static void isr_rxdmaok(SLMP_INFO *info); |
| 616 | static void isr_rxdmaerror(SLMP_INFO *info); |
| 617 | static void isr_txdmaok(SLMP_INFO *info); |
| 618 | static void isr_txdmaerror(SLMP_INFO *info); |
| 619 | static void isr_io_pin(SLMP_INFO *info, u16 status); |
| 620 | |
| 621 | static int alloc_dma_bufs(SLMP_INFO *info); |
| 622 | static void free_dma_bufs(SLMP_INFO *info); |
| 623 | static int alloc_buf_list(SLMP_INFO *info); |
| 624 | static int alloc_frame_bufs(SLMP_INFO *info, SCADESC *list, SCADESC_EX *list_ex,int count); |
| 625 | static int alloc_tmp_rx_buf(SLMP_INFO *info); |
| 626 | static void free_tmp_rx_buf(SLMP_INFO *info); |
| 627 | |
| 628 | static void load_pci_memory(SLMP_INFO *info, char* dest, const char* src, unsigned short count); |
| 629 | static void trace_block(SLMP_INFO *info, const char* data, int count, int xmit); |
| 630 | static void tx_timeout(unsigned long context); |
| 631 | static void status_timeout(unsigned long context); |
| 632 | |
| 633 | static unsigned char read_reg(SLMP_INFO *info, unsigned char addr); |
| 634 | static void write_reg(SLMP_INFO *info, unsigned char addr, unsigned char val); |
| 635 | static u16 read_reg16(SLMP_INFO *info, unsigned char addr); |
| 636 | static void write_reg16(SLMP_INFO *info, unsigned char addr, u16 val); |
| 637 | static unsigned char read_status_reg(SLMP_INFO * info); |
| 638 | static void write_control_reg(SLMP_INFO * info); |
| 639 | |
| 640 | |
| 641 | static unsigned char rx_active_fifo_level = 16; // rx request FIFO activation level in bytes |
| 642 | static unsigned char tx_active_fifo_level = 16; // tx request FIFO activation level in bytes |
| 643 | static unsigned char tx_negate_fifo_level = 32; // tx request FIFO negation level in bytes |
| 644 | |
| 645 | static u32 misc_ctrl_value = 0x007e4040; |
Paul Fulghum | 761a444 | 2005-09-09 13:02:15 -0700 | [diff] [blame] | 646 | static u32 lcr1_brdr_value = 0x00800028; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 647 | |
| 648 | static u32 read_ahead_count = 8; |
| 649 | |
| 650 | /* DPCR, DMA Priority Control |
| 651 | * |
| 652 | * 07..05 Not used, must be 0 |
| 653 | * 04 BRC, bus release condition: 0=all transfers complete |
| 654 | * 1=release after 1 xfer on all channels |
| 655 | * 03 CCC, channel change condition: 0=every cycle |
| 656 | * 1=after each channel completes all xfers |
| 657 | * 02..00 PR<2..0>, priority 100=round robin |
| 658 | * |
| 659 | * 00000100 = 0x00 |
| 660 | */ |
| 661 | static unsigned char dma_priority = 0x04; |
| 662 | |
| 663 | // Number of bytes that can be written to shared RAM |
| 664 | // in a single write operation |
| 665 | static u32 sca_pci_load_interval = 64; |
| 666 | |
| 667 | /* |
| 668 | * 1st function defined in .text section. Calling this function in |
| 669 | * init_module() followed by a breakpoint allows a remote debugger |
| 670 | * (gdb) to get the .text address for the add-symbol-file command. |
| 671 | * This allows remote debugging of dynamically loadable modules. |
| 672 | */ |
| 673 | static void* synclinkmp_get_text_ptr(void); |
| 674 | static void* synclinkmp_get_text_ptr(void) {return synclinkmp_get_text_ptr;} |
| 675 | |
| 676 | static inline int sanity_check(SLMP_INFO *info, |
| 677 | char *name, const char *routine) |
| 678 | { |
| 679 | #ifdef SANITY_CHECK |
| 680 | static const char *badmagic = |
| 681 | "Warning: bad magic number for synclinkmp_struct (%s) in %s\n"; |
| 682 | static const char *badinfo = |
| 683 | "Warning: null synclinkmp_struct for (%s) in %s\n"; |
| 684 | |
| 685 | if (!info) { |
| 686 | printk(badinfo, name, routine); |
| 687 | return 1; |
| 688 | } |
| 689 | if (info->magic != MGSL_MAGIC) { |
| 690 | printk(badmagic, name, routine); |
| 691 | return 1; |
| 692 | } |
| 693 | #else |
| 694 | if (!info) |
| 695 | return 1; |
| 696 | #endif |
| 697 | return 0; |
| 698 | } |
| 699 | |
| 700 | /** |
| 701 | * line discipline callback wrappers |
| 702 | * |
| 703 | * The wrappers maintain line discipline references |
| 704 | * while calling into the line discipline. |
| 705 | * |
| 706 | * ldisc_receive_buf - pass receive data to line discipline |
| 707 | */ |
| 708 | |
| 709 | static void ldisc_receive_buf(struct tty_struct *tty, |
| 710 | const __u8 *data, char *flags, int count) |
| 711 | { |
| 712 | struct tty_ldisc *ld; |
| 713 | if (!tty) |
| 714 | return; |
| 715 | ld = tty_ldisc_ref(tty); |
| 716 | if (ld) { |
| 717 | if (ld->receive_buf) |
| 718 | ld->receive_buf(tty, data, flags, count); |
| 719 | tty_ldisc_deref(ld); |
| 720 | } |
| 721 | } |
| 722 | |
| 723 | /* tty callbacks */ |
| 724 | |
| 725 | /* Called when a port is opened. Init and enable port. |
| 726 | */ |
| 727 | static int open(struct tty_struct *tty, struct file *filp) |
| 728 | { |
| 729 | SLMP_INFO *info; |
| 730 | int retval, line; |
| 731 | unsigned long flags; |
| 732 | |
| 733 | line = tty->index; |
| 734 | if ((line < 0) || (line >= synclinkmp_device_count)) { |
| 735 | printk("%s(%d): open with invalid line #%d.\n", |
| 736 | __FILE__,__LINE__,line); |
| 737 | return -ENODEV; |
| 738 | } |
| 739 | |
| 740 | info = synclinkmp_device_list; |
| 741 | while(info && info->line != line) |
| 742 | info = info->next_device; |
| 743 | if (sanity_check(info, tty->name, "open")) |
| 744 | return -ENODEV; |
| 745 | if ( info->init_error ) { |
| 746 | printk("%s(%d):%s device is not allocated, init error=%d\n", |
| 747 | __FILE__,__LINE__,info->device_name,info->init_error); |
| 748 | return -ENODEV; |
| 749 | } |
| 750 | |
| 751 | tty->driver_data = info; |
| 752 | info->tty = tty; |
| 753 | |
| 754 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 755 | printk("%s(%d):%s open(), old ref count = %d\n", |
| 756 | __FILE__,__LINE__,tty->driver->name, info->count); |
| 757 | |
| 758 | /* If port is closing, signal caller to try again */ |
| 759 | if (tty_hung_up_p(filp) || info->flags & ASYNC_CLOSING){ |
| 760 | if (info->flags & ASYNC_CLOSING) |
| 761 | interruptible_sleep_on(&info->close_wait); |
| 762 | retval = ((info->flags & ASYNC_HUP_NOTIFY) ? |
| 763 | -EAGAIN : -ERESTARTSYS); |
| 764 | goto cleanup; |
| 765 | } |
| 766 | |
| 767 | info->tty->low_latency = (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0; |
| 768 | |
| 769 | spin_lock_irqsave(&info->netlock, flags); |
| 770 | if (info->netcount) { |
| 771 | retval = -EBUSY; |
| 772 | spin_unlock_irqrestore(&info->netlock, flags); |
| 773 | goto cleanup; |
| 774 | } |
| 775 | info->count++; |
| 776 | spin_unlock_irqrestore(&info->netlock, flags); |
| 777 | |
| 778 | if (info->count == 1) { |
| 779 | /* 1st open on this device, init hardware */ |
| 780 | retval = startup(info); |
| 781 | if (retval < 0) |
| 782 | goto cleanup; |
| 783 | } |
| 784 | |
| 785 | retval = block_til_ready(tty, filp, info); |
| 786 | if (retval) { |
| 787 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 788 | printk("%s(%d):%s block_til_ready() returned %d\n", |
| 789 | __FILE__,__LINE__, info->device_name, retval); |
| 790 | goto cleanup; |
| 791 | } |
| 792 | |
| 793 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 794 | printk("%s(%d):%s open() success\n", |
| 795 | __FILE__,__LINE__, info->device_name); |
| 796 | retval = 0; |
| 797 | |
| 798 | cleanup: |
| 799 | if (retval) { |
| 800 | if (tty->count == 1) |
| 801 | info->tty = NULL; /* tty layer will release tty struct */ |
| 802 | if(info->count) |
| 803 | info->count--; |
| 804 | } |
| 805 | |
| 806 | return retval; |
| 807 | } |
| 808 | |
| 809 | /* Called when port is closed. Wait for remaining data to be |
| 810 | * sent. Disable port and free resources. |
| 811 | */ |
| 812 | static void close(struct tty_struct *tty, struct file *filp) |
| 813 | { |
| 814 | SLMP_INFO * info = (SLMP_INFO *)tty->driver_data; |
| 815 | |
| 816 | if (sanity_check(info, tty->name, "close")) |
| 817 | return; |
| 818 | |
| 819 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 820 | printk("%s(%d):%s close() entry, count=%d\n", |
| 821 | __FILE__,__LINE__, info->device_name, info->count); |
| 822 | |
| 823 | if (!info->count) |
| 824 | return; |
| 825 | |
| 826 | if (tty_hung_up_p(filp)) |
| 827 | goto cleanup; |
| 828 | |
| 829 | if ((tty->count == 1) && (info->count != 1)) { |
| 830 | /* |
| 831 | * tty->count is 1 and the tty structure will be freed. |
| 832 | * info->count should be one in this case. |
| 833 | * if it's not, correct it so that the port is shutdown. |
| 834 | */ |
| 835 | printk("%s(%d):%s close: bad refcount; tty->count is 1, " |
| 836 | "info->count is %d\n", |
| 837 | __FILE__,__LINE__, info->device_name, info->count); |
| 838 | info->count = 1; |
| 839 | } |
| 840 | |
| 841 | info->count--; |
| 842 | |
| 843 | /* if at least one open remaining, leave hardware active */ |
| 844 | if (info->count) |
| 845 | goto cleanup; |
| 846 | |
| 847 | info->flags |= ASYNC_CLOSING; |
| 848 | |
| 849 | /* set tty->closing to notify line discipline to |
| 850 | * only process XON/XOFF characters. Only the N_TTY |
| 851 | * discipline appears to use this (ppp does not). |
| 852 | */ |
| 853 | tty->closing = 1; |
| 854 | |
| 855 | /* wait for transmit data to clear all layers */ |
| 856 | |
| 857 | if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE) { |
| 858 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 859 | printk("%s(%d):%s close() calling tty_wait_until_sent\n", |
| 860 | __FILE__,__LINE__, info->device_name ); |
| 861 | tty_wait_until_sent(tty, info->closing_wait); |
| 862 | } |
| 863 | |
| 864 | if (info->flags & ASYNC_INITIALIZED) |
| 865 | wait_until_sent(tty, info->timeout); |
| 866 | |
| 867 | if (tty->driver->flush_buffer) |
| 868 | tty->driver->flush_buffer(tty); |
| 869 | |
| 870 | tty_ldisc_flush(tty); |
| 871 | |
| 872 | shutdown(info); |
| 873 | |
| 874 | tty->closing = 0; |
| 875 | info->tty = NULL; |
| 876 | |
| 877 | if (info->blocked_open) { |
| 878 | if (info->close_delay) { |
| 879 | msleep_interruptible(jiffies_to_msecs(info->close_delay)); |
| 880 | } |
| 881 | wake_up_interruptible(&info->open_wait); |
| 882 | } |
| 883 | |
| 884 | info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING); |
| 885 | |
| 886 | wake_up_interruptible(&info->close_wait); |
| 887 | |
| 888 | cleanup: |
| 889 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 890 | printk("%s(%d):%s close() exit, count=%d\n", __FILE__,__LINE__, |
| 891 | tty->driver->name, info->count); |
| 892 | } |
| 893 | |
| 894 | /* Called by tty_hangup() when a hangup is signaled. |
| 895 | * This is the same as closing all open descriptors for the port. |
| 896 | */ |
| 897 | static void hangup(struct tty_struct *tty) |
| 898 | { |
| 899 | SLMP_INFO *info = (SLMP_INFO *)tty->driver_data; |
| 900 | |
| 901 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 902 | printk("%s(%d):%s hangup()\n", |
| 903 | __FILE__,__LINE__, info->device_name ); |
| 904 | |
| 905 | if (sanity_check(info, tty->name, "hangup")) |
| 906 | return; |
| 907 | |
| 908 | flush_buffer(tty); |
| 909 | shutdown(info); |
| 910 | |
| 911 | info->count = 0; |
| 912 | info->flags &= ~ASYNC_NORMAL_ACTIVE; |
| 913 | info->tty = NULL; |
| 914 | |
| 915 | wake_up_interruptible(&info->open_wait); |
| 916 | } |
| 917 | |
| 918 | /* Set new termios settings |
| 919 | */ |
| 920 | static void set_termios(struct tty_struct *tty, struct termios *old_termios) |
| 921 | { |
| 922 | SLMP_INFO *info = (SLMP_INFO *)tty->driver_data; |
| 923 | unsigned long flags; |
| 924 | |
| 925 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 926 | printk("%s(%d):%s set_termios()\n", __FILE__,__LINE__, |
| 927 | tty->driver->name ); |
| 928 | |
| 929 | /* just return if nothing has changed */ |
| 930 | if ((tty->termios->c_cflag == old_termios->c_cflag) |
| 931 | && (RELEVANT_IFLAG(tty->termios->c_iflag) |
| 932 | == RELEVANT_IFLAG(old_termios->c_iflag))) |
| 933 | return; |
| 934 | |
| 935 | change_params(info); |
| 936 | |
| 937 | /* Handle transition to B0 status */ |
| 938 | if (old_termios->c_cflag & CBAUD && |
| 939 | !(tty->termios->c_cflag & CBAUD)) { |
| 940 | info->serial_signals &= ~(SerialSignal_RTS + SerialSignal_DTR); |
| 941 | spin_lock_irqsave(&info->lock,flags); |
| 942 | set_signals(info); |
| 943 | spin_unlock_irqrestore(&info->lock,flags); |
| 944 | } |
| 945 | |
| 946 | /* Handle transition away from B0 status */ |
| 947 | if (!(old_termios->c_cflag & CBAUD) && |
| 948 | tty->termios->c_cflag & CBAUD) { |
| 949 | info->serial_signals |= SerialSignal_DTR; |
| 950 | if (!(tty->termios->c_cflag & CRTSCTS) || |
| 951 | !test_bit(TTY_THROTTLED, &tty->flags)) { |
| 952 | info->serial_signals |= SerialSignal_RTS; |
| 953 | } |
| 954 | spin_lock_irqsave(&info->lock,flags); |
| 955 | set_signals(info); |
| 956 | spin_unlock_irqrestore(&info->lock,flags); |
| 957 | } |
| 958 | |
| 959 | /* Handle turning off CRTSCTS */ |
| 960 | if (old_termios->c_cflag & CRTSCTS && |
| 961 | !(tty->termios->c_cflag & CRTSCTS)) { |
| 962 | tty->hw_stopped = 0; |
| 963 | tx_release(tty); |
| 964 | } |
| 965 | } |
| 966 | |
| 967 | /* Send a block of data |
| 968 | * |
| 969 | * Arguments: |
| 970 | * |
| 971 | * tty pointer to tty information structure |
| 972 | * buf pointer to buffer containing send data |
| 973 | * count size of send data in bytes |
| 974 | * |
| 975 | * Return Value: number of characters written |
| 976 | */ |
| 977 | static int write(struct tty_struct *tty, |
| 978 | const unsigned char *buf, int count) |
| 979 | { |
| 980 | int c, ret = 0; |
| 981 | SLMP_INFO *info = (SLMP_INFO *)tty->driver_data; |
| 982 | unsigned long flags; |
| 983 | |
| 984 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 985 | printk("%s(%d):%s write() count=%d\n", |
| 986 | __FILE__,__LINE__,info->device_name,count); |
| 987 | |
| 988 | if (sanity_check(info, tty->name, "write")) |
| 989 | goto cleanup; |
| 990 | |
Eric Sesterhenn | 326f28e9 | 2006-06-25 05:48:48 -0700 | [diff] [blame] | 991 | if (!info->tx_buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 992 | goto cleanup; |
| 993 | |
| 994 | if (info->params.mode == MGSL_MODE_HDLC) { |
| 995 | if (count > info->max_frame_size) { |
| 996 | ret = -EIO; |
| 997 | goto cleanup; |
| 998 | } |
| 999 | if (info->tx_active) |
| 1000 | goto cleanup; |
| 1001 | if (info->tx_count) { |
| 1002 | /* send accumulated data from send_char() calls */ |
| 1003 | /* as frame and wait before accepting more data. */ |
| 1004 | tx_load_dma_buffer(info, info->tx_buf, info->tx_count); |
| 1005 | goto start; |
| 1006 | } |
| 1007 | ret = info->tx_count = count; |
| 1008 | tx_load_dma_buffer(info, buf, count); |
| 1009 | goto start; |
| 1010 | } |
| 1011 | |
| 1012 | for (;;) { |
| 1013 | c = min_t(int, count, |
| 1014 | min(info->max_frame_size - info->tx_count - 1, |
| 1015 | info->max_frame_size - info->tx_put)); |
| 1016 | if (c <= 0) |
| 1017 | break; |
| 1018 | |
| 1019 | memcpy(info->tx_buf + info->tx_put, buf, c); |
| 1020 | |
| 1021 | spin_lock_irqsave(&info->lock,flags); |
| 1022 | info->tx_put += c; |
| 1023 | if (info->tx_put >= info->max_frame_size) |
| 1024 | info->tx_put -= info->max_frame_size; |
| 1025 | info->tx_count += c; |
| 1026 | spin_unlock_irqrestore(&info->lock,flags); |
| 1027 | |
| 1028 | buf += c; |
| 1029 | count -= c; |
| 1030 | ret += c; |
| 1031 | } |
| 1032 | |
| 1033 | if (info->params.mode == MGSL_MODE_HDLC) { |
| 1034 | if (count) { |
| 1035 | ret = info->tx_count = 0; |
| 1036 | goto cleanup; |
| 1037 | } |
| 1038 | tx_load_dma_buffer(info, info->tx_buf, info->tx_count); |
| 1039 | } |
| 1040 | start: |
| 1041 | if (info->tx_count && !tty->stopped && !tty->hw_stopped) { |
| 1042 | spin_lock_irqsave(&info->lock,flags); |
| 1043 | if (!info->tx_active) |
| 1044 | tx_start(info); |
| 1045 | spin_unlock_irqrestore(&info->lock,flags); |
| 1046 | } |
| 1047 | |
| 1048 | cleanup: |
| 1049 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 1050 | printk( "%s(%d):%s write() returning=%d\n", |
| 1051 | __FILE__,__LINE__,info->device_name,ret); |
| 1052 | return ret; |
| 1053 | } |
| 1054 | |
| 1055 | /* Add a character to the transmit buffer. |
| 1056 | */ |
| 1057 | static void put_char(struct tty_struct *tty, unsigned char ch) |
| 1058 | { |
| 1059 | SLMP_INFO *info = (SLMP_INFO *)tty->driver_data; |
| 1060 | unsigned long flags; |
| 1061 | |
| 1062 | if ( debug_level >= DEBUG_LEVEL_INFO ) { |
| 1063 | printk( "%s(%d):%s put_char(%d)\n", |
| 1064 | __FILE__,__LINE__,info->device_name,ch); |
| 1065 | } |
| 1066 | |
| 1067 | if (sanity_check(info, tty->name, "put_char")) |
| 1068 | return; |
| 1069 | |
Eric Sesterhenn | 326f28e9 | 2006-06-25 05:48:48 -0700 | [diff] [blame] | 1070 | if (!info->tx_buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1071 | return; |
| 1072 | |
| 1073 | spin_lock_irqsave(&info->lock,flags); |
| 1074 | |
| 1075 | if ( (info->params.mode != MGSL_MODE_HDLC) || |
| 1076 | !info->tx_active ) { |
| 1077 | |
| 1078 | if (info->tx_count < info->max_frame_size - 1) { |
| 1079 | info->tx_buf[info->tx_put++] = ch; |
| 1080 | if (info->tx_put >= info->max_frame_size) |
| 1081 | info->tx_put -= info->max_frame_size; |
| 1082 | info->tx_count++; |
| 1083 | } |
| 1084 | } |
| 1085 | |
| 1086 | spin_unlock_irqrestore(&info->lock,flags); |
| 1087 | } |
| 1088 | |
| 1089 | /* Send a high-priority XON/XOFF character |
| 1090 | */ |
| 1091 | static void send_xchar(struct tty_struct *tty, char ch) |
| 1092 | { |
| 1093 | SLMP_INFO *info = (SLMP_INFO *)tty->driver_data; |
| 1094 | unsigned long flags; |
| 1095 | |
| 1096 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 1097 | printk("%s(%d):%s send_xchar(%d)\n", |
| 1098 | __FILE__,__LINE__, info->device_name, ch ); |
| 1099 | |
| 1100 | if (sanity_check(info, tty->name, "send_xchar")) |
| 1101 | return; |
| 1102 | |
| 1103 | info->x_char = ch; |
| 1104 | if (ch) { |
| 1105 | /* Make sure transmit interrupts are on */ |
| 1106 | spin_lock_irqsave(&info->lock,flags); |
| 1107 | if (!info->tx_enabled) |
| 1108 | tx_start(info); |
| 1109 | spin_unlock_irqrestore(&info->lock,flags); |
| 1110 | } |
| 1111 | } |
| 1112 | |
| 1113 | /* Wait until the transmitter is empty. |
| 1114 | */ |
| 1115 | static void wait_until_sent(struct tty_struct *tty, int timeout) |
| 1116 | { |
| 1117 | SLMP_INFO * info = (SLMP_INFO *)tty->driver_data; |
| 1118 | unsigned long orig_jiffies, char_time; |
| 1119 | |
| 1120 | if (!info ) |
| 1121 | return; |
| 1122 | |
| 1123 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 1124 | printk("%s(%d):%s wait_until_sent() entry\n", |
| 1125 | __FILE__,__LINE__, info->device_name ); |
| 1126 | |
| 1127 | if (sanity_check(info, tty->name, "wait_until_sent")) |
| 1128 | return; |
| 1129 | |
| 1130 | if (!(info->flags & ASYNC_INITIALIZED)) |
| 1131 | goto exit; |
| 1132 | |
| 1133 | orig_jiffies = jiffies; |
| 1134 | |
| 1135 | /* Set check interval to 1/5 of estimated time to |
| 1136 | * send a character, and make it at least 1. The check |
| 1137 | * interval should also be less than the timeout. |
| 1138 | * Note: use tight timings here to satisfy the NIST-PCTS. |
| 1139 | */ |
| 1140 | |
| 1141 | if ( info->params.data_rate ) { |
| 1142 | char_time = info->timeout/(32 * 5); |
| 1143 | if (!char_time) |
| 1144 | char_time++; |
| 1145 | } else |
| 1146 | char_time = 1; |
| 1147 | |
| 1148 | if (timeout) |
| 1149 | char_time = min_t(unsigned long, char_time, timeout); |
| 1150 | |
| 1151 | if ( info->params.mode == MGSL_MODE_HDLC ) { |
| 1152 | while (info->tx_active) { |
| 1153 | msleep_interruptible(jiffies_to_msecs(char_time)); |
| 1154 | if (signal_pending(current)) |
| 1155 | break; |
| 1156 | if (timeout && time_after(jiffies, orig_jiffies + timeout)) |
| 1157 | break; |
| 1158 | } |
| 1159 | } else { |
| 1160 | //TODO: determine if there is something similar to USC16C32 |
| 1161 | // TXSTATUS_ALL_SENT status |
| 1162 | while ( info->tx_active && info->tx_enabled) { |
| 1163 | msleep_interruptible(jiffies_to_msecs(char_time)); |
| 1164 | if (signal_pending(current)) |
| 1165 | break; |
| 1166 | if (timeout && time_after(jiffies, orig_jiffies + timeout)) |
| 1167 | break; |
| 1168 | } |
| 1169 | } |
| 1170 | |
| 1171 | exit: |
| 1172 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 1173 | printk("%s(%d):%s wait_until_sent() exit\n", |
| 1174 | __FILE__,__LINE__, info->device_name ); |
| 1175 | } |
| 1176 | |
| 1177 | /* Return the count of free bytes in transmit buffer |
| 1178 | */ |
| 1179 | static int write_room(struct tty_struct *tty) |
| 1180 | { |
| 1181 | SLMP_INFO *info = (SLMP_INFO *)tty->driver_data; |
| 1182 | int ret; |
| 1183 | |
| 1184 | if (sanity_check(info, tty->name, "write_room")) |
| 1185 | return 0; |
| 1186 | |
| 1187 | if (info->params.mode == MGSL_MODE_HDLC) { |
| 1188 | ret = (info->tx_active) ? 0 : HDLC_MAX_FRAME_SIZE; |
| 1189 | } else { |
| 1190 | ret = info->max_frame_size - info->tx_count - 1; |
| 1191 | if (ret < 0) |
| 1192 | ret = 0; |
| 1193 | } |
| 1194 | |
| 1195 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 1196 | printk("%s(%d):%s write_room()=%d\n", |
| 1197 | __FILE__, __LINE__, info->device_name, ret); |
| 1198 | |
| 1199 | return ret; |
| 1200 | } |
| 1201 | |
| 1202 | /* enable transmitter and send remaining buffered characters |
| 1203 | */ |
| 1204 | static void flush_chars(struct tty_struct *tty) |
| 1205 | { |
| 1206 | SLMP_INFO *info = (SLMP_INFO *)tty->driver_data; |
| 1207 | unsigned long flags; |
| 1208 | |
| 1209 | if ( debug_level >= DEBUG_LEVEL_INFO ) |
| 1210 | printk( "%s(%d):%s flush_chars() entry tx_count=%d\n", |
| 1211 | __FILE__,__LINE__,info->device_name,info->tx_count); |
| 1212 | |
| 1213 | if (sanity_check(info, tty->name, "flush_chars")) |
| 1214 | return; |
| 1215 | |
| 1216 | if (info->tx_count <= 0 || tty->stopped || tty->hw_stopped || |
| 1217 | !info->tx_buf) |
| 1218 | return; |
| 1219 | |
| 1220 | if ( debug_level >= DEBUG_LEVEL_INFO ) |
| 1221 | printk( "%s(%d):%s flush_chars() entry, starting transmitter\n", |
| 1222 | __FILE__,__LINE__,info->device_name ); |
| 1223 | |
| 1224 | spin_lock_irqsave(&info->lock,flags); |
| 1225 | |
| 1226 | if (!info->tx_active) { |
| 1227 | if ( (info->params.mode == MGSL_MODE_HDLC) && |
| 1228 | info->tx_count ) { |
| 1229 | /* operating in synchronous (frame oriented) mode */ |
| 1230 | /* copy data from circular tx_buf to */ |
| 1231 | /* transmit DMA buffer. */ |
| 1232 | tx_load_dma_buffer(info, |
| 1233 | info->tx_buf,info->tx_count); |
| 1234 | } |
| 1235 | tx_start(info); |
| 1236 | } |
| 1237 | |
| 1238 | spin_unlock_irqrestore(&info->lock,flags); |
| 1239 | } |
| 1240 | |
| 1241 | /* Discard all data in the send buffer |
| 1242 | */ |
| 1243 | static void flush_buffer(struct tty_struct *tty) |
| 1244 | { |
| 1245 | SLMP_INFO *info = (SLMP_INFO *)tty->driver_data; |
| 1246 | unsigned long flags; |
| 1247 | |
| 1248 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 1249 | printk("%s(%d):%s flush_buffer() entry\n", |
| 1250 | __FILE__,__LINE__, info->device_name ); |
| 1251 | |
| 1252 | if (sanity_check(info, tty->name, "flush_buffer")) |
| 1253 | return; |
| 1254 | |
| 1255 | spin_lock_irqsave(&info->lock,flags); |
| 1256 | info->tx_count = info->tx_put = info->tx_get = 0; |
| 1257 | del_timer(&info->tx_timer); |
| 1258 | spin_unlock_irqrestore(&info->lock,flags); |
| 1259 | |
| 1260 | wake_up_interruptible(&tty->write_wait); |
| 1261 | tty_wakeup(tty); |
| 1262 | } |
| 1263 | |
| 1264 | /* throttle (stop) transmitter |
| 1265 | */ |
| 1266 | static void tx_hold(struct tty_struct *tty) |
| 1267 | { |
| 1268 | SLMP_INFO *info = (SLMP_INFO *)tty->driver_data; |
| 1269 | unsigned long flags; |
| 1270 | |
| 1271 | if (sanity_check(info, tty->name, "tx_hold")) |
| 1272 | return; |
| 1273 | |
| 1274 | if ( debug_level >= DEBUG_LEVEL_INFO ) |
| 1275 | printk("%s(%d):%s tx_hold()\n", |
| 1276 | __FILE__,__LINE__,info->device_name); |
| 1277 | |
| 1278 | spin_lock_irqsave(&info->lock,flags); |
| 1279 | if (info->tx_enabled) |
| 1280 | tx_stop(info); |
| 1281 | spin_unlock_irqrestore(&info->lock,flags); |
| 1282 | } |
| 1283 | |
| 1284 | /* release (start) transmitter |
| 1285 | */ |
| 1286 | static void tx_release(struct tty_struct *tty) |
| 1287 | { |
| 1288 | SLMP_INFO *info = (SLMP_INFO *)tty->driver_data; |
| 1289 | unsigned long flags; |
| 1290 | |
| 1291 | if (sanity_check(info, tty->name, "tx_release")) |
| 1292 | return; |
| 1293 | |
| 1294 | if ( debug_level >= DEBUG_LEVEL_INFO ) |
| 1295 | printk("%s(%d):%s tx_release()\n", |
| 1296 | __FILE__,__LINE__,info->device_name); |
| 1297 | |
| 1298 | spin_lock_irqsave(&info->lock,flags); |
| 1299 | if (!info->tx_enabled) |
| 1300 | tx_start(info); |
| 1301 | spin_unlock_irqrestore(&info->lock,flags); |
| 1302 | } |
| 1303 | |
| 1304 | /* Service an IOCTL request |
| 1305 | * |
| 1306 | * Arguments: |
| 1307 | * |
| 1308 | * tty pointer to tty instance data |
| 1309 | * file pointer to associated file object for device |
| 1310 | * cmd IOCTL command code |
| 1311 | * arg command argument/context |
| 1312 | * |
| 1313 | * Return Value: 0 if success, otherwise error code |
| 1314 | */ |
| 1315 | static int ioctl(struct tty_struct *tty, struct file *file, |
| 1316 | unsigned int cmd, unsigned long arg) |
| 1317 | { |
| 1318 | SLMP_INFO *info = (SLMP_INFO *)tty->driver_data; |
| 1319 | int error; |
| 1320 | struct mgsl_icount cnow; /* kernel counter temps */ |
| 1321 | struct serial_icounter_struct __user *p_cuser; /* user space */ |
| 1322 | unsigned long flags; |
| 1323 | void __user *argp = (void __user *)arg; |
| 1324 | |
| 1325 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 1326 | printk("%s(%d):%s ioctl() cmd=%08X\n", __FILE__,__LINE__, |
| 1327 | info->device_name, cmd ); |
| 1328 | |
| 1329 | if (sanity_check(info, tty->name, "ioctl")) |
| 1330 | return -ENODEV; |
| 1331 | |
| 1332 | if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) && |
| 1333 | (cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT)) { |
| 1334 | if (tty->flags & (1 << TTY_IO_ERROR)) |
| 1335 | return -EIO; |
| 1336 | } |
| 1337 | |
| 1338 | switch (cmd) { |
| 1339 | case MGSL_IOCGPARAMS: |
| 1340 | return get_params(info, argp); |
| 1341 | case MGSL_IOCSPARAMS: |
| 1342 | return set_params(info, argp); |
| 1343 | case MGSL_IOCGTXIDLE: |
| 1344 | return get_txidle(info, argp); |
| 1345 | case MGSL_IOCSTXIDLE: |
| 1346 | return set_txidle(info, (int)arg); |
| 1347 | case MGSL_IOCTXENABLE: |
| 1348 | return tx_enable(info, (int)arg); |
| 1349 | case MGSL_IOCRXENABLE: |
| 1350 | return rx_enable(info, (int)arg); |
| 1351 | case MGSL_IOCTXABORT: |
| 1352 | return tx_abort(info); |
| 1353 | case MGSL_IOCGSTATS: |
| 1354 | return get_stats(info, argp); |
| 1355 | case MGSL_IOCWAITEVENT: |
| 1356 | return wait_mgsl_event(info, argp); |
| 1357 | case MGSL_IOCLOOPTXDONE: |
| 1358 | return 0; // TODO: Not supported, need to document |
| 1359 | /* Wait for modem input (DCD,RI,DSR,CTS) change |
| 1360 | * as specified by mask in arg (TIOCM_RNG/DSR/CD/CTS) |
| 1361 | */ |
| 1362 | case TIOCMIWAIT: |
| 1363 | return modem_input_wait(info,(int)arg); |
| 1364 | |
| 1365 | /* |
| 1366 | * Get counter of input serial line interrupts (DCD,RI,DSR,CTS) |
| 1367 | * Return: write counters to the user passed counter struct |
| 1368 | * NB: both 1->0 and 0->1 transitions are counted except for |
| 1369 | * RI where only 0->1 is counted. |
| 1370 | */ |
| 1371 | case TIOCGICOUNT: |
| 1372 | spin_lock_irqsave(&info->lock,flags); |
| 1373 | cnow = info->icount; |
| 1374 | spin_unlock_irqrestore(&info->lock,flags); |
| 1375 | p_cuser = argp; |
| 1376 | PUT_USER(error,cnow.cts, &p_cuser->cts); |
| 1377 | if (error) return error; |
| 1378 | PUT_USER(error,cnow.dsr, &p_cuser->dsr); |
| 1379 | if (error) return error; |
| 1380 | PUT_USER(error,cnow.rng, &p_cuser->rng); |
| 1381 | if (error) return error; |
| 1382 | PUT_USER(error,cnow.dcd, &p_cuser->dcd); |
| 1383 | if (error) return error; |
| 1384 | PUT_USER(error,cnow.rx, &p_cuser->rx); |
| 1385 | if (error) return error; |
| 1386 | PUT_USER(error,cnow.tx, &p_cuser->tx); |
| 1387 | if (error) return error; |
| 1388 | PUT_USER(error,cnow.frame, &p_cuser->frame); |
| 1389 | if (error) return error; |
| 1390 | PUT_USER(error,cnow.overrun, &p_cuser->overrun); |
| 1391 | if (error) return error; |
| 1392 | PUT_USER(error,cnow.parity, &p_cuser->parity); |
| 1393 | if (error) return error; |
| 1394 | PUT_USER(error,cnow.brk, &p_cuser->brk); |
| 1395 | if (error) return error; |
| 1396 | PUT_USER(error,cnow.buf_overrun, &p_cuser->buf_overrun); |
| 1397 | if (error) return error; |
| 1398 | return 0; |
| 1399 | default: |
| 1400 | return -ENOIOCTLCMD; |
| 1401 | } |
| 1402 | return 0; |
| 1403 | } |
| 1404 | |
| 1405 | /* |
| 1406 | * /proc fs routines.... |
| 1407 | */ |
| 1408 | |
| 1409 | static inline int line_info(char *buf, SLMP_INFO *info) |
| 1410 | { |
| 1411 | char stat_buf[30]; |
| 1412 | int ret; |
| 1413 | unsigned long flags; |
| 1414 | |
| 1415 | ret = sprintf(buf, "%s: SCABase=%08x Mem=%08X StatusControl=%08x LCR=%08X\n" |
| 1416 | "\tIRQ=%d MaxFrameSize=%u\n", |
| 1417 | info->device_name, |
| 1418 | info->phys_sca_base, |
| 1419 | info->phys_memory_base, |
| 1420 | info->phys_statctrl_base, |
| 1421 | info->phys_lcr_base, |
| 1422 | info->irq_level, |
| 1423 | info->max_frame_size ); |
| 1424 | |
| 1425 | /* output current serial signal states */ |
| 1426 | spin_lock_irqsave(&info->lock,flags); |
| 1427 | get_signals(info); |
| 1428 | spin_unlock_irqrestore(&info->lock,flags); |
| 1429 | |
| 1430 | stat_buf[0] = 0; |
| 1431 | stat_buf[1] = 0; |
| 1432 | if (info->serial_signals & SerialSignal_RTS) |
| 1433 | strcat(stat_buf, "|RTS"); |
| 1434 | if (info->serial_signals & SerialSignal_CTS) |
| 1435 | strcat(stat_buf, "|CTS"); |
| 1436 | if (info->serial_signals & SerialSignal_DTR) |
| 1437 | strcat(stat_buf, "|DTR"); |
| 1438 | if (info->serial_signals & SerialSignal_DSR) |
| 1439 | strcat(stat_buf, "|DSR"); |
| 1440 | if (info->serial_signals & SerialSignal_DCD) |
| 1441 | strcat(stat_buf, "|CD"); |
| 1442 | if (info->serial_signals & SerialSignal_RI) |
| 1443 | strcat(stat_buf, "|RI"); |
| 1444 | |
| 1445 | if (info->params.mode == MGSL_MODE_HDLC) { |
| 1446 | ret += sprintf(buf+ret, "\tHDLC txok:%d rxok:%d", |
| 1447 | info->icount.txok, info->icount.rxok); |
| 1448 | if (info->icount.txunder) |
| 1449 | ret += sprintf(buf+ret, " txunder:%d", info->icount.txunder); |
| 1450 | if (info->icount.txabort) |
| 1451 | ret += sprintf(buf+ret, " txabort:%d", info->icount.txabort); |
| 1452 | if (info->icount.rxshort) |
| 1453 | ret += sprintf(buf+ret, " rxshort:%d", info->icount.rxshort); |
| 1454 | if (info->icount.rxlong) |
| 1455 | ret += sprintf(buf+ret, " rxlong:%d", info->icount.rxlong); |
| 1456 | if (info->icount.rxover) |
| 1457 | ret += sprintf(buf+ret, " rxover:%d", info->icount.rxover); |
| 1458 | if (info->icount.rxcrc) |
| 1459 | ret += sprintf(buf+ret, " rxlong:%d", info->icount.rxcrc); |
| 1460 | } else { |
| 1461 | ret += sprintf(buf+ret, "\tASYNC tx:%d rx:%d", |
| 1462 | info->icount.tx, info->icount.rx); |
| 1463 | if (info->icount.frame) |
| 1464 | ret += sprintf(buf+ret, " fe:%d", info->icount.frame); |
| 1465 | if (info->icount.parity) |
| 1466 | ret += sprintf(buf+ret, " pe:%d", info->icount.parity); |
| 1467 | if (info->icount.brk) |
| 1468 | ret += sprintf(buf+ret, " brk:%d", info->icount.brk); |
| 1469 | if (info->icount.overrun) |
| 1470 | ret += sprintf(buf+ret, " oe:%d", info->icount.overrun); |
| 1471 | } |
| 1472 | |
| 1473 | /* Append serial signal status to end */ |
| 1474 | ret += sprintf(buf+ret, " %s\n", stat_buf+1); |
| 1475 | |
| 1476 | ret += sprintf(buf+ret, "\ttxactive=%d bh_req=%d bh_run=%d pending_bh=%x\n", |
| 1477 | info->tx_active,info->bh_requested,info->bh_running, |
| 1478 | info->pending_bh); |
| 1479 | |
| 1480 | return ret; |
| 1481 | } |
| 1482 | |
| 1483 | /* Called to print information about devices |
| 1484 | */ |
| 1485 | int read_proc(char *page, char **start, off_t off, int count, |
| 1486 | int *eof, void *data) |
| 1487 | { |
| 1488 | int len = 0, l; |
| 1489 | off_t begin = 0; |
| 1490 | SLMP_INFO *info; |
| 1491 | |
| 1492 | len += sprintf(page, "synclinkmp driver:%s\n", driver_version); |
| 1493 | |
| 1494 | info = synclinkmp_device_list; |
| 1495 | while( info ) { |
| 1496 | l = line_info(page + len, info); |
| 1497 | len += l; |
| 1498 | if (len+begin > off+count) |
| 1499 | goto done; |
| 1500 | if (len+begin < off) { |
| 1501 | begin += len; |
| 1502 | len = 0; |
| 1503 | } |
| 1504 | info = info->next_device; |
| 1505 | } |
| 1506 | |
| 1507 | *eof = 1; |
| 1508 | done: |
| 1509 | if (off >= len+begin) |
| 1510 | return 0; |
| 1511 | *start = page + (off-begin); |
| 1512 | return ((count < begin+len-off) ? count : begin+len-off); |
| 1513 | } |
| 1514 | |
| 1515 | /* Return the count of bytes in transmit buffer |
| 1516 | */ |
| 1517 | static int chars_in_buffer(struct tty_struct *tty) |
| 1518 | { |
| 1519 | SLMP_INFO *info = (SLMP_INFO *)tty->driver_data; |
| 1520 | |
| 1521 | if (sanity_check(info, tty->name, "chars_in_buffer")) |
| 1522 | return 0; |
| 1523 | |
| 1524 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 1525 | printk("%s(%d):%s chars_in_buffer()=%d\n", |
| 1526 | __FILE__, __LINE__, info->device_name, info->tx_count); |
| 1527 | |
| 1528 | return info->tx_count; |
| 1529 | } |
| 1530 | |
| 1531 | /* Signal remote device to throttle send data (our receive data) |
| 1532 | */ |
| 1533 | static void throttle(struct tty_struct * tty) |
| 1534 | { |
| 1535 | SLMP_INFO *info = (SLMP_INFO *)tty->driver_data; |
| 1536 | unsigned long flags; |
| 1537 | |
| 1538 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 1539 | printk("%s(%d):%s throttle() entry\n", |
| 1540 | __FILE__,__LINE__, info->device_name ); |
| 1541 | |
| 1542 | if (sanity_check(info, tty->name, "throttle")) |
| 1543 | return; |
| 1544 | |
| 1545 | if (I_IXOFF(tty)) |
| 1546 | send_xchar(tty, STOP_CHAR(tty)); |
| 1547 | |
| 1548 | if (tty->termios->c_cflag & CRTSCTS) { |
| 1549 | spin_lock_irqsave(&info->lock,flags); |
| 1550 | info->serial_signals &= ~SerialSignal_RTS; |
| 1551 | set_signals(info); |
| 1552 | spin_unlock_irqrestore(&info->lock,flags); |
| 1553 | } |
| 1554 | } |
| 1555 | |
| 1556 | /* Signal remote device to stop throttling send data (our receive data) |
| 1557 | */ |
| 1558 | static void unthrottle(struct tty_struct * tty) |
| 1559 | { |
| 1560 | SLMP_INFO *info = (SLMP_INFO *)tty->driver_data; |
| 1561 | unsigned long flags; |
| 1562 | |
| 1563 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 1564 | printk("%s(%d):%s unthrottle() entry\n", |
| 1565 | __FILE__,__LINE__, info->device_name ); |
| 1566 | |
| 1567 | if (sanity_check(info, tty->name, "unthrottle")) |
| 1568 | return; |
| 1569 | |
| 1570 | if (I_IXOFF(tty)) { |
| 1571 | if (info->x_char) |
| 1572 | info->x_char = 0; |
| 1573 | else |
| 1574 | send_xchar(tty, START_CHAR(tty)); |
| 1575 | } |
| 1576 | |
| 1577 | if (tty->termios->c_cflag & CRTSCTS) { |
| 1578 | spin_lock_irqsave(&info->lock,flags); |
| 1579 | info->serial_signals |= SerialSignal_RTS; |
| 1580 | set_signals(info); |
| 1581 | spin_unlock_irqrestore(&info->lock,flags); |
| 1582 | } |
| 1583 | } |
| 1584 | |
| 1585 | /* set or clear transmit break condition |
| 1586 | * break_state -1=set break condition, 0=clear |
| 1587 | */ |
| 1588 | static void set_break(struct tty_struct *tty, int break_state) |
| 1589 | { |
| 1590 | unsigned char RegValue; |
| 1591 | SLMP_INFO * info = (SLMP_INFO *)tty->driver_data; |
| 1592 | unsigned long flags; |
| 1593 | |
| 1594 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 1595 | printk("%s(%d):%s set_break(%d)\n", |
| 1596 | __FILE__,__LINE__, info->device_name, break_state); |
| 1597 | |
| 1598 | if (sanity_check(info, tty->name, "set_break")) |
| 1599 | return; |
| 1600 | |
| 1601 | spin_lock_irqsave(&info->lock,flags); |
| 1602 | RegValue = read_reg(info, CTL); |
| 1603 | if (break_state == -1) |
| 1604 | RegValue |= BIT3; |
| 1605 | else |
| 1606 | RegValue &= ~BIT3; |
| 1607 | write_reg(info, CTL, RegValue); |
| 1608 | spin_unlock_irqrestore(&info->lock,flags); |
| 1609 | } |
| 1610 | |
| 1611 | #ifdef CONFIG_HDLC |
| 1612 | |
| 1613 | /** |
| 1614 | * called by generic HDLC layer when protocol selected (PPP, frame relay, etc.) |
| 1615 | * set encoding and frame check sequence (FCS) options |
| 1616 | * |
| 1617 | * dev pointer to network device structure |
| 1618 | * encoding serial encoding setting |
| 1619 | * parity FCS setting |
| 1620 | * |
| 1621 | * returns 0 if success, otherwise error code |
| 1622 | */ |
| 1623 | static int hdlcdev_attach(struct net_device *dev, unsigned short encoding, |
| 1624 | unsigned short parity) |
| 1625 | { |
| 1626 | SLMP_INFO *info = dev_to_port(dev); |
| 1627 | unsigned char new_encoding; |
| 1628 | unsigned short new_crctype; |
| 1629 | |
| 1630 | /* return error if TTY interface open */ |
| 1631 | if (info->count) |
| 1632 | return -EBUSY; |
| 1633 | |
| 1634 | switch (encoding) |
| 1635 | { |
| 1636 | case ENCODING_NRZ: new_encoding = HDLC_ENCODING_NRZ; break; |
| 1637 | case ENCODING_NRZI: new_encoding = HDLC_ENCODING_NRZI_SPACE; break; |
| 1638 | case ENCODING_FM_MARK: new_encoding = HDLC_ENCODING_BIPHASE_MARK; break; |
| 1639 | case ENCODING_FM_SPACE: new_encoding = HDLC_ENCODING_BIPHASE_SPACE; break; |
| 1640 | case ENCODING_MANCHESTER: new_encoding = HDLC_ENCODING_BIPHASE_LEVEL; break; |
| 1641 | default: return -EINVAL; |
| 1642 | } |
| 1643 | |
| 1644 | switch (parity) |
| 1645 | { |
| 1646 | case PARITY_NONE: new_crctype = HDLC_CRC_NONE; break; |
| 1647 | case PARITY_CRC16_PR1_CCITT: new_crctype = HDLC_CRC_16_CCITT; break; |
| 1648 | case PARITY_CRC32_PR1_CCITT: new_crctype = HDLC_CRC_32_CCITT; break; |
| 1649 | default: return -EINVAL; |
| 1650 | } |
| 1651 | |
| 1652 | info->params.encoding = new_encoding; |
Alexey Dobriyan | 53b3531 | 2006-03-24 03:16:13 -0800 | [diff] [blame] | 1653 | info->params.crc_type = new_crctype; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1654 | |
| 1655 | /* if network interface up, reprogram hardware */ |
| 1656 | if (info->netcount) |
| 1657 | program_hw(info); |
| 1658 | |
| 1659 | return 0; |
| 1660 | } |
| 1661 | |
| 1662 | /** |
| 1663 | * called by generic HDLC layer to send frame |
| 1664 | * |
| 1665 | * skb socket buffer containing HDLC frame |
| 1666 | * dev pointer to network device structure |
| 1667 | * |
| 1668 | * returns 0 if success, otherwise error code |
| 1669 | */ |
| 1670 | static int hdlcdev_xmit(struct sk_buff *skb, struct net_device *dev) |
| 1671 | { |
| 1672 | SLMP_INFO *info = dev_to_port(dev); |
| 1673 | struct net_device_stats *stats = hdlc_stats(dev); |
| 1674 | unsigned long flags; |
| 1675 | |
| 1676 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 1677 | printk(KERN_INFO "%s:hdlc_xmit(%s)\n",__FILE__,dev->name); |
| 1678 | |
| 1679 | /* stop sending until this frame completes */ |
| 1680 | netif_stop_queue(dev); |
| 1681 | |
| 1682 | /* copy data to device buffers */ |
| 1683 | info->tx_count = skb->len; |
| 1684 | tx_load_dma_buffer(info, skb->data, skb->len); |
| 1685 | |
| 1686 | /* update network statistics */ |
| 1687 | stats->tx_packets++; |
| 1688 | stats->tx_bytes += skb->len; |
| 1689 | |
| 1690 | /* done with socket buffer, so free it */ |
| 1691 | dev_kfree_skb(skb); |
| 1692 | |
| 1693 | /* save start time for transmit timeout detection */ |
| 1694 | dev->trans_start = jiffies; |
| 1695 | |
| 1696 | /* start hardware transmitter if necessary */ |
| 1697 | spin_lock_irqsave(&info->lock,flags); |
| 1698 | if (!info->tx_active) |
| 1699 | tx_start(info); |
| 1700 | spin_unlock_irqrestore(&info->lock,flags); |
| 1701 | |
| 1702 | return 0; |
| 1703 | } |
| 1704 | |
| 1705 | /** |
| 1706 | * called by network layer when interface enabled |
| 1707 | * claim resources and initialize hardware |
| 1708 | * |
| 1709 | * dev pointer to network device structure |
| 1710 | * |
| 1711 | * returns 0 if success, otherwise error code |
| 1712 | */ |
| 1713 | static int hdlcdev_open(struct net_device *dev) |
| 1714 | { |
| 1715 | SLMP_INFO *info = dev_to_port(dev); |
| 1716 | int rc; |
| 1717 | unsigned long flags; |
| 1718 | |
| 1719 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 1720 | printk("%s:hdlcdev_open(%s)\n",__FILE__,dev->name); |
| 1721 | |
| 1722 | /* generic HDLC layer open processing */ |
| 1723 | if ((rc = hdlc_open(dev))) |
| 1724 | return rc; |
| 1725 | |
| 1726 | /* arbitrate between network and tty opens */ |
| 1727 | spin_lock_irqsave(&info->netlock, flags); |
| 1728 | if (info->count != 0 || info->netcount != 0) { |
| 1729 | printk(KERN_WARNING "%s: hdlc_open returning busy\n", dev->name); |
| 1730 | spin_unlock_irqrestore(&info->netlock, flags); |
| 1731 | return -EBUSY; |
| 1732 | } |
| 1733 | info->netcount=1; |
| 1734 | spin_unlock_irqrestore(&info->netlock, flags); |
| 1735 | |
| 1736 | /* claim resources and init adapter */ |
| 1737 | if ((rc = startup(info)) != 0) { |
| 1738 | spin_lock_irqsave(&info->netlock, flags); |
| 1739 | info->netcount=0; |
| 1740 | spin_unlock_irqrestore(&info->netlock, flags); |
| 1741 | return rc; |
| 1742 | } |
| 1743 | |
| 1744 | /* assert DTR and RTS, apply hardware settings */ |
| 1745 | info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR; |
| 1746 | program_hw(info); |
| 1747 | |
| 1748 | /* enable network layer transmit */ |
| 1749 | dev->trans_start = jiffies; |
| 1750 | netif_start_queue(dev); |
| 1751 | |
| 1752 | /* inform generic HDLC layer of current DCD status */ |
| 1753 | spin_lock_irqsave(&info->lock, flags); |
| 1754 | get_signals(info); |
| 1755 | spin_unlock_irqrestore(&info->lock, flags); |
| 1756 | hdlc_set_carrier(info->serial_signals & SerialSignal_DCD, dev); |
| 1757 | |
| 1758 | return 0; |
| 1759 | } |
| 1760 | |
| 1761 | /** |
| 1762 | * called by network layer when interface is disabled |
| 1763 | * shutdown hardware and release resources |
| 1764 | * |
| 1765 | * dev pointer to network device structure |
| 1766 | * |
| 1767 | * returns 0 if success, otherwise error code |
| 1768 | */ |
| 1769 | static int hdlcdev_close(struct net_device *dev) |
| 1770 | { |
| 1771 | SLMP_INFO *info = dev_to_port(dev); |
| 1772 | unsigned long flags; |
| 1773 | |
| 1774 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 1775 | printk("%s:hdlcdev_close(%s)\n",__FILE__,dev->name); |
| 1776 | |
| 1777 | netif_stop_queue(dev); |
| 1778 | |
| 1779 | /* shutdown adapter and release resources */ |
| 1780 | shutdown(info); |
| 1781 | |
| 1782 | hdlc_close(dev); |
| 1783 | |
| 1784 | spin_lock_irqsave(&info->netlock, flags); |
| 1785 | info->netcount=0; |
| 1786 | spin_unlock_irqrestore(&info->netlock, flags); |
| 1787 | |
| 1788 | return 0; |
| 1789 | } |
| 1790 | |
| 1791 | /** |
| 1792 | * called by network layer to process IOCTL call to network device |
| 1793 | * |
| 1794 | * dev pointer to network device structure |
| 1795 | * ifr pointer to network interface request structure |
| 1796 | * cmd IOCTL command code |
| 1797 | * |
| 1798 | * returns 0 if success, otherwise error code |
| 1799 | */ |
| 1800 | static int hdlcdev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) |
| 1801 | { |
| 1802 | const size_t size = sizeof(sync_serial_settings); |
| 1803 | sync_serial_settings new_line; |
| 1804 | sync_serial_settings __user *line = ifr->ifr_settings.ifs_ifsu.sync; |
| 1805 | SLMP_INFO *info = dev_to_port(dev); |
| 1806 | unsigned int flags; |
| 1807 | |
| 1808 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 1809 | printk("%s:hdlcdev_ioctl(%s)\n",__FILE__,dev->name); |
| 1810 | |
| 1811 | /* return error if TTY interface open */ |
| 1812 | if (info->count) |
| 1813 | return -EBUSY; |
| 1814 | |
| 1815 | if (cmd != SIOCWANDEV) |
| 1816 | return hdlc_ioctl(dev, ifr, cmd); |
| 1817 | |
| 1818 | switch(ifr->ifr_settings.type) { |
| 1819 | case IF_GET_IFACE: /* return current sync_serial_settings */ |
| 1820 | |
| 1821 | ifr->ifr_settings.type = IF_IFACE_SYNC_SERIAL; |
| 1822 | if (ifr->ifr_settings.size < size) { |
| 1823 | ifr->ifr_settings.size = size; /* data size wanted */ |
| 1824 | return -ENOBUFS; |
| 1825 | } |
| 1826 | |
| 1827 | flags = info->params.flags & (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL | |
| 1828 | HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN | |
| 1829 | HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL | |
| 1830 | HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN); |
| 1831 | |
| 1832 | switch (flags){ |
| 1833 | case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_TXCPIN): new_line.clock_type = CLOCK_EXT; break; |
| 1834 | case (HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG): new_line.clock_type = CLOCK_INT; break; |
| 1835 | case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_BRG): new_line.clock_type = CLOCK_TXINT; break; |
| 1836 | case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_RXCPIN): new_line.clock_type = CLOCK_TXFROMRX; break; |
| 1837 | default: new_line.clock_type = CLOCK_DEFAULT; |
| 1838 | } |
| 1839 | |
| 1840 | new_line.clock_rate = info->params.clock_speed; |
| 1841 | new_line.loopback = info->params.loopback ? 1:0; |
| 1842 | |
| 1843 | if (copy_to_user(line, &new_line, size)) |
| 1844 | return -EFAULT; |
| 1845 | return 0; |
| 1846 | |
| 1847 | case IF_IFACE_SYNC_SERIAL: /* set sync_serial_settings */ |
| 1848 | |
| 1849 | if(!capable(CAP_NET_ADMIN)) |
| 1850 | return -EPERM; |
| 1851 | if (copy_from_user(&new_line, line, size)) |
| 1852 | return -EFAULT; |
| 1853 | |
| 1854 | switch (new_line.clock_type) |
| 1855 | { |
| 1856 | case CLOCK_EXT: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_TXCPIN; break; |
| 1857 | case CLOCK_TXFROMRX: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_RXCPIN; break; |
| 1858 | case CLOCK_INT: flags = HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG; break; |
| 1859 | case CLOCK_TXINT: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_BRG; break; |
| 1860 | case CLOCK_DEFAULT: flags = info->params.flags & |
| 1861 | (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL | |
| 1862 | HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN | |
| 1863 | HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL | |
| 1864 | HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN); break; |
| 1865 | default: return -EINVAL; |
| 1866 | } |
| 1867 | |
| 1868 | if (new_line.loopback != 0 && new_line.loopback != 1) |
| 1869 | return -EINVAL; |
| 1870 | |
| 1871 | info->params.flags &= ~(HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL | |
| 1872 | HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN | |
| 1873 | HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL | |
| 1874 | HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN); |
| 1875 | info->params.flags |= flags; |
| 1876 | |
| 1877 | info->params.loopback = new_line.loopback; |
| 1878 | |
| 1879 | if (flags & (HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG)) |
| 1880 | info->params.clock_speed = new_line.clock_rate; |
| 1881 | else |
| 1882 | info->params.clock_speed = 0; |
| 1883 | |
| 1884 | /* if network interface up, reprogram hardware */ |
| 1885 | if (info->netcount) |
| 1886 | program_hw(info); |
| 1887 | return 0; |
| 1888 | |
| 1889 | default: |
| 1890 | return hdlc_ioctl(dev, ifr, cmd); |
| 1891 | } |
| 1892 | } |
| 1893 | |
| 1894 | /** |
| 1895 | * called by network layer when transmit timeout is detected |
| 1896 | * |
| 1897 | * dev pointer to network device structure |
| 1898 | */ |
| 1899 | static void hdlcdev_tx_timeout(struct net_device *dev) |
| 1900 | { |
| 1901 | SLMP_INFO *info = dev_to_port(dev); |
| 1902 | struct net_device_stats *stats = hdlc_stats(dev); |
| 1903 | unsigned long flags; |
| 1904 | |
| 1905 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 1906 | printk("hdlcdev_tx_timeout(%s)\n",dev->name); |
| 1907 | |
| 1908 | stats->tx_errors++; |
| 1909 | stats->tx_aborted_errors++; |
| 1910 | |
| 1911 | spin_lock_irqsave(&info->lock,flags); |
| 1912 | tx_stop(info); |
| 1913 | spin_unlock_irqrestore(&info->lock,flags); |
| 1914 | |
| 1915 | netif_wake_queue(dev); |
| 1916 | } |
| 1917 | |
| 1918 | /** |
| 1919 | * called by device driver when transmit completes |
| 1920 | * reenable network layer transmit if stopped |
| 1921 | * |
| 1922 | * info pointer to device instance information |
| 1923 | */ |
| 1924 | static void hdlcdev_tx_done(SLMP_INFO *info) |
| 1925 | { |
| 1926 | if (netif_queue_stopped(info->netdev)) |
| 1927 | netif_wake_queue(info->netdev); |
| 1928 | } |
| 1929 | |
| 1930 | /** |
| 1931 | * called by device driver when frame received |
| 1932 | * pass frame to network layer |
| 1933 | * |
| 1934 | * info pointer to device instance information |
| 1935 | * buf pointer to buffer contianing frame data |
| 1936 | * size count of data bytes in buf |
| 1937 | */ |
| 1938 | static void hdlcdev_rx(SLMP_INFO *info, char *buf, int size) |
| 1939 | { |
| 1940 | struct sk_buff *skb = dev_alloc_skb(size); |
| 1941 | struct net_device *dev = info->netdev; |
| 1942 | struct net_device_stats *stats = hdlc_stats(dev); |
| 1943 | |
| 1944 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 1945 | printk("hdlcdev_rx(%s)\n",dev->name); |
| 1946 | |
| 1947 | if (skb == NULL) { |
| 1948 | printk(KERN_NOTICE "%s: can't alloc skb, dropping packet\n", dev->name); |
| 1949 | stats->rx_dropped++; |
| 1950 | return; |
| 1951 | } |
| 1952 | |
| 1953 | memcpy(skb_put(skb, size),buf,size); |
| 1954 | |
| 1955 | skb->protocol = hdlc_type_trans(skb, info->netdev); |
| 1956 | |
| 1957 | stats->rx_packets++; |
| 1958 | stats->rx_bytes += size; |
| 1959 | |
| 1960 | netif_rx(skb); |
| 1961 | |
| 1962 | info->netdev->last_rx = jiffies; |
| 1963 | } |
| 1964 | |
| 1965 | /** |
| 1966 | * called by device driver when adding device instance |
| 1967 | * do generic HDLC initialization |
| 1968 | * |
| 1969 | * info pointer to device instance information |
| 1970 | * |
| 1971 | * returns 0 if success, otherwise error code |
| 1972 | */ |
| 1973 | static int hdlcdev_init(SLMP_INFO *info) |
| 1974 | { |
| 1975 | int rc; |
| 1976 | struct net_device *dev; |
| 1977 | hdlc_device *hdlc; |
| 1978 | |
| 1979 | /* allocate and initialize network and HDLC layer objects */ |
| 1980 | |
| 1981 | if (!(dev = alloc_hdlcdev(info))) { |
| 1982 | printk(KERN_ERR "%s:hdlc device allocation failure\n",__FILE__); |
| 1983 | return -ENOMEM; |
| 1984 | } |
| 1985 | |
| 1986 | /* for network layer reporting purposes only */ |
| 1987 | dev->mem_start = info->phys_sca_base; |
| 1988 | dev->mem_end = info->phys_sca_base + SCA_BASE_SIZE - 1; |
| 1989 | dev->irq = info->irq_level; |
| 1990 | |
| 1991 | /* network layer callbacks and settings */ |
| 1992 | dev->do_ioctl = hdlcdev_ioctl; |
| 1993 | dev->open = hdlcdev_open; |
| 1994 | dev->stop = hdlcdev_close; |
| 1995 | dev->tx_timeout = hdlcdev_tx_timeout; |
| 1996 | dev->watchdog_timeo = 10*HZ; |
| 1997 | dev->tx_queue_len = 50; |
| 1998 | |
| 1999 | /* generic HDLC layer callbacks and settings */ |
| 2000 | hdlc = dev_to_hdlc(dev); |
| 2001 | hdlc->attach = hdlcdev_attach; |
| 2002 | hdlc->xmit = hdlcdev_xmit; |
| 2003 | |
| 2004 | /* register objects with HDLC layer */ |
| 2005 | if ((rc = register_hdlc_device(dev))) { |
| 2006 | printk(KERN_WARNING "%s:unable to register hdlc device\n",__FILE__); |
| 2007 | free_netdev(dev); |
| 2008 | return rc; |
| 2009 | } |
| 2010 | |
| 2011 | info->netdev = dev; |
| 2012 | return 0; |
| 2013 | } |
| 2014 | |
| 2015 | /** |
| 2016 | * called by device driver when removing device instance |
| 2017 | * do generic HDLC cleanup |
| 2018 | * |
| 2019 | * info pointer to device instance information |
| 2020 | */ |
| 2021 | static void hdlcdev_exit(SLMP_INFO *info) |
| 2022 | { |
| 2023 | unregister_hdlc_device(info->netdev); |
| 2024 | free_netdev(info->netdev); |
| 2025 | info->netdev = NULL; |
| 2026 | } |
| 2027 | |
| 2028 | #endif /* CONFIG_HDLC */ |
| 2029 | |
| 2030 | |
| 2031 | /* Return next bottom half action to perform. |
| 2032 | * Return Value: BH action code or 0 if nothing to do. |
| 2033 | */ |
| 2034 | int bh_action(SLMP_INFO *info) |
| 2035 | { |
| 2036 | unsigned long flags; |
| 2037 | int rc = 0; |
| 2038 | |
| 2039 | spin_lock_irqsave(&info->lock,flags); |
| 2040 | |
| 2041 | if (info->pending_bh & BH_RECEIVE) { |
| 2042 | info->pending_bh &= ~BH_RECEIVE; |
| 2043 | rc = BH_RECEIVE; |
| 2044 | } else if (info->pending_bh & BH_TRANSMIT) { |
| 2045 | info->pending_bh &= ~BH_TRANSMIT; |
| 2046 | rc = BH_TRANSMIT; |
| 2047 | } else if (info->pending_bh & BH_STATUS) { |
| 2048 | info->pending_bh &= ~BH_STATUS; |
| 2049 | rc = BH_STATUS; |
| 2050 | } |
| 2051 | |
| 2052 | if (!rc) { |
| 2053 | /* Mark BH routine as complete */ |
| 2054 | info->bh_running = 0; |
| 2055 | info->bh_requested = 0; |
| 2056 | } |
| 2057 | |
| 2058 | spin_unlock_irqrestore(&info->lock,flags); |
| 2059 | |
| 2060 | return rc; |
| 2061 | } |
| 2062 | |
| 2063 | /* Perform bottom half processing of work items queued by ISR. |
| 2064 | */ |
| 2065 | void bh_handler(void* Context) |
| 2066 | { |
| 2067 | SLMP_INFO *info = (SLMP_INFO*)Context; |
| 2068 | int action; |
| 2069 | |
| 2070 | if (!info) |
| 2071 | return; |
| 2072 | |
| 2073 | if ( debug_level >= DEBUG_LEVEL_BH ) |
| 2074 | printk( "%s(%d):%s bh_handler() entry\n", |
| 2075 | __FILE__,__LINE__,info->device_name); |
| 2076 | |
| 2077 | info->bh_running = 1; |
| 2078 | |
| 2079 | while((action = bh_action(info)) != 0) { |
| 2080 | |
| 2081 | /* Process work item */ |
| 2082 | if ( debug_level >= DEBUG_LEVEL_BH ) |
| 2083 | printk( "%s(%d):%s bh_handler() work item action=%d\n", |
| 2084 | __FILE__,__LINE__,info->device_name, action); |
| 2085 | |
| 2086 | switch (action) { |
| 2087 | |
| 2088 | case BH_RECEIVE: |
| 2089 | bh_receive(info); |
| 2090 | break; |
| 2091 | case BH_TRANSMIT: |
| 2092 | bh_transmit(info); |
| 2093 | break; |
| 2094 | case BH_STATUS: |
| 2095 | bh_status(info); |
| 2096 | break; |
| 2097 | default: |
| 2098 | /* unknown work item ID */ |
| 2099 | printk("%s(%d):%s Unknown work item ID=%08X!\n", |
| 2100 | __FILE__,__LINE__,info->device_name,action); |
| 2101 | break; |
| 2102 | } |
| 2103 | } |
| 2104 | |
| 2105 | if ( debug_level >= DEBUG_LEVEL_BH ) |
| 2106 | printk( "%s(%d):%s bh_handler() exit\n", |
| 2107 | __FILE__,__LINE__,info->device_name); |
| 2108 | } |
| 2109 | |
| 2110 | void bh_receive(SLMP_INFO *info) |
| 2111 | { |
| 2112 | if ( debug_level >= DEBUG_LEVEL_BH ) |
| 2113 | printk( "%s(%d):%s bh_receive()\n", |
| 2114 | __FILE__,__LINE__,info->device_name); |
| 2115 | |
| 2116 | while( rx_get_frame(info) ); |
| 2117 | } |
| 2118 | |
| 2119 | void bh_transmit(SLMP_INFO *info) |
| 2120 | { |
| 2121 | struct tty_struct *tty = info->tty; |
| 2122 | |
| 2123 | if ( debug_level >= DEBUG_LEVEL_BH ) |
| 2124 | printk( "%s(%d):%s bh_transmit() entry\n", |
| 2125 | __FILE__,__LINE__,info->device_name); |
| 2126 | |
| 2127 | if (tty) { |
| 2128 | tty_wakeup(tty); |
| 2129 | wake_up_interruptible(&tty->write_wait); |
| 2130 | } |
| 2131 | } |
| 2132 | |
| 2133 | void bh_status(SLMP_INFO *info) |
| 2134 | { |
| 2135 | if ( debug_level >= DEBUG_LEVEL_BH ) |
| 2136 | printk( "%s(%d):%s bh_status() entry\n", |
| 2137 | __FILE__,__LINE__,info->device_name); |
| 2138 | |
| 2139 | info->ri_chkcount = 0; |
| 2140 | info->dsr_chkcount = 0; |
| 2141 | info->dcd_chkcount = 0; |
| 2142 | info->cts_chkcount = 0; |
| 2143 | } |
| 2144 | |
| 2145 | void isr_timer(SLMP_INFO * info) |
| 2146 | { |
| 2147 | unsigned char timer = (info->port_num & 1) ? TIMER2 : TIMER0; |
| 2148 | |
| 2149 | /* IER2<7..4> = timer<3..0> interrupt enables (0=disabled) */ |
| 2150 | write_reg(info, IER2, 0); |
| 2151 | |
| 2152 | /* TMCS, Timer Control/Status Register |
| 2153 | * |
| 2154 | * 07 CMF, Compare match flag (read only) 1=match |
| 2155 | * 06 ECMI, CMF Interrupt Enable: 0=disabled |
| 2156 | * 05 Reserved, must be 0 |
| 2157 | * 04 TME, Timer Enable |
| 2158 | * 03..00 Reserved, must be 0 |
| 2159 | * |
| 2160 | * 0000 0000 |
| 2161 | */ |
| 2162 | write_reg(info, (unsigned char)(timer + TMCS), 0); |
| 2163 | |
| 2164 | info->irq_occurred = TRUE; |
| 2165 | |
| 2166 | if ( debug_level >= DEBUG_LEVEL_ISR ) |
| 2167 | printk("%s(%d):%s isr_timer()\n", |
| 2168 | __FILE__,__LINE__,info->device_name); |
| 2169 | } |
| 2170 | |
| 2171 | void isr_rxint(SLMP_INFO * info) |
| 2172 | { |
| 2173 | struct tty_struct *tty = info->tty; |
| 2174 | struct mgsl_icount *icount = &info->icount; |
| 2175 | unsigned char status = read_reg(info, SR1) & info->ie1_value & (FLGD + IDLD + CDCD + BRKD); |
| 2176 | unsigned char status2 = read_reg(info, SR2) & info->ie2_value & OVRN; |
| 2177 | |
| 2178 | /* clear status bits */ |
| 2179 | if (status) |
| 2180 | write_reg(info, SR1, status); |
| 2181 | |
| 2182 | if (status2) |
| 2183 | write_reg(info, SR2, status2); |
| 2184 | |
| 2185 | if ( debug_level >= DEBUG_LEVEL_ISR ) |
| 2186 | printk("%s(%d):%s isr_rxint status=%02X %02x\n", |
| 2187 | __FILE__,__LINE__,info->device_name,status,status2); |
| 2188 | |
| 2189 | if (info->params.mode == MGSL_MODE_ASYNC) { |
| 2190 | if (status & BRKD) { |
| 2191 | icount->brk++; |
| 2192 | |
| 2193 | /* process break detection if tty control |
| 2194 | * is not set to ignore it |
| 2195 | */ |
| 2196 | if ( tty ) { |
| 2197 | if (!(status & info->ignore_status_mask1)) { |
| 2198 | if (info->read_status_mask1 & BRKD) { |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 2199 | tty_insert_flip_char(tty, 0, TTY_BREAK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2200 | if (info->flags & ASYNC_SAK) |
| 2201 | do_SAK(tty); |
| 2202 | } |
| 2203 | } |
| 2204 | } |
| 2205 | } |
| 2206 | } |
| 2207 | else { |
| 2208 | if (status & (FLGD|IDLD)) { |
| 2209 | if (status & FLGD) |
| 2210 | info->icount.exithunt++; |
| 2211 | else if (status & IDLD) |
| 2212 | info->icount.rxidle++; |
| 2213 | wake_up_interruptible(&info->event_wait_q); |
| 2214 | } |
| 2215 | } |
| 2216 | |
| 2217 | if (status & CDCD) { |
| 2218 | /* simulate a common modem status change interrupt |
| 2219 | * for our handler |
| 2220 | */ |
| 2221 | get_signals( info ); |
| 2222 | isr_io_pin(info, |
| 2223 | MISCSTATUS_DCD_LATCHED|(info->serial_signals&SerialSignal_DCD)); |
| 2224 | } |
| 2225 | } |
| 2226 | |
| 2227 | /* |
| 2228 | * handle async rx data interrupts |
| 2229 | */ |
| 2230 | void isr_rxrdy(SLMP_INFO * info) |
| 2231 | { |
| 2232 | u16 status; |
| 2233 | unsigned char DataByte; |
| 2234 | struct tty_struct *tty = info->tty; |
| 2235 | struct mgsl_icount *icount = &info->icount; |
| 2236 | |
| 2237 | if ( debug_level >= DEBUG_LEVEL_ISR ) |
| 2238 | printk("%s(%d):%s isr_rxrdy\n", |
| 2239 | __FILE__,__LINE__,info->device_name); |
| 2240 | |
| 2241 | while((status = read_reg(info,CST0)) & BIT0) |
| 2242 | { |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 2243 | int flag = 0; |
| 2244 | int over = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2245 | DataByte = read_reg(info,TRB); |
| 2246 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2247 | icount->rx++; |
| 2248 | |
| 2249 | if ( status & (PE + FRME + OVRN) ) { |
| 2250 | printk("%s(%d):%s rxerr=%04X\n", |
| 2251 | __FILE__,__LINE__,info->device_name,status); |
| 2252 | |
| 2253 | /* update error statistics */ |
| 2254 | if (status & PE) |
| 2255 | icount->parity++; |
| 2256 | else if (status & FRME) |
| 2257 | icount->frame++; |
| 2258 | else if (status & OVRN) |
| 2259 | icount->overrun++; |
| 2260 | |
| 2261 | /* discard char if tty control flags say so */ |
| 2262 | if (status & info->ignore_status_mask2) |
| 2263 | continue; |
| 2264 | |
| 2265 | status &= info->read_status_mask2; |
| 2266 | |
| 2267 | if ( tty ) { |
| 2268 | if (status & PE) |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 2269 | flag = TTY_PARITY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2270 | else if (status & FRME) |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 2271 | flag = TTY_FRAME; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2272 | if (status & OVRN) { |
| 2273 | /* Overrun is special, since it's |
| 2274 | * reported immediately, and doesn't |
| 2275 | * affect the current character |
| 2276 | */ |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 2277 | over = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2278 | } |
| 2279 | } |
| 2280 | } /* end of if (error) */ |
| 2281 | |
| 2282 | if ( tty ) { |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 2283 | tty_insert_flip_char(tty, DataByte, flag); |
| 2284 | if (over) |
| 2285 | tty_insert_flip_char(tty, 0, TTY_OVERRUN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2286 | } |
| 2287 | } |
| 2288 | |
| 2289 | if ( debug_level >= DEBUG_LEVEL_ISR ) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2290 | printk("%s(%d):%s rx=%d brk=%d parity=%d frame=%d overrun=%d\n", |
| 2291 | __FILE__,__LINE__,info->device_name, |
| 2292 | icount->rx,icount->brk,icount->parity, |
| 2293 | icount->frame,icount->overrun); |
| 2294 | } |
| 2295 | |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 2296 | if ( tty ) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2297 | tty_flip_buffer_push(tty); |
| 2298 | } |
| 2299 | |
| 2300 | static void isr_txeom(SLMP_INFO * info, unsigned char status) |
| 2301 | { |
| 2302 | if ( debug_level >= DEBUG_LEVEL_ISR ) |
| 2303 | printk("%s(%d):%s isr_txeom status=%02x\n", |
| 2304 | __FILE__,__LINE__,info->device_name,status); |
| 2305 | |
| 2306 | write_reg(info, TXDMA + DIR, 0x00); /* disable Tx DMA IRQs */ |
| 2307 | write_reg(info, TXDMA + DSR, 0xc0); /* clear IRQs and disable DMA */ |
| 2308 | write_reg(info, TXDMA + DCMD, SWABORT); /* reset/init DMA channel */ |
| 2309 | |
| 2310 | if (status & UDRN) { |
| 2311 | write_reg(info, CMD, TXRESET); |
| 2312 | write_reg(info, CMD, TXENABLE); |
| 2313 | } else |
| 2314 | write_reg(info, CMD, TXBUFCLR); |
| 2315 | |
| 2316 | /* disable and clear tx interrupts */ |
| 2317 | info->ie0_value &= ~TXRDYE; |
| 2318 | info->ie1_value &= ~(IDLE + UDRN); |
| 2319 | write_reg16(info, IE0, (unsigned short)((info->ie1_value << 8) + info->ie0_value)); |
| 2320 | write_reg(info, SR1, (unsigned char)(UDRN + IDLE)); |
| 2321 | |
| 2322 | if ( info->tx_active ) { |
| 2323 | if (info->params.mode != MGSL_MODE_ASYNC) { |
| 2324 | if (status & UDRN) |
| 2325 | info->icount.txunder++; |
| 2326 | else if (status & IDLE) |
| 2327 | info->icount.txok++; |
| 2328 | } |
| 2329 | |
| 2330 | info->tx_active = 0; |
| 2331 | info->tx_count = info->tx_put = info->tx_get = 0; |
| 2332 | |
| 2333 | del_timer(&info->tx_timer); |
| 2334 | |
| 2335 | if (info->params.mode != MGSL_MODE_ASYNC && info->drop_rts_on_tx_done ) { |
| 2336 | info->serial_signals &= ~SerialSignal_RTS; |
| 2337 | info->drop_rts_on_tx_done = 0; |
| 2338 | set_signals(info); |
| 2339 | } |
| 2340 | |
| 2341 | #ifdef CONFIG_HDLC |
| 2342 | if (info->netcount) |
| 2343 | hdlcdev_tx_done(info); |
| 2344 | else |
| 2345 | #endif |
| 2346 | { |
| 2347 | if (info->tty && (info->tty->stopped || info->tty->hw_stopped)) { |
| 2348 | tx_stop(info); |
| 2349 | return; |
| 2350 | } |
| 2351 | info->pending_bh |= BH_TRANSMIT; |
| 2352 | } |
| 2353 | } |
| 2354 | } |
| 2355 | |
| 2356 | |
| 2357 | /* |
| 2358 | * handle tx status interrupts |
| 2359 | */ |
| 2360 | void isr_txint(SLMP_INFO * info) |
| 2361 | { |
| 2362 | unsigned char status = read_reg(info, SR1) & info->ie1_value & (UDRN + IDLE + CCTS); |
| 2363 | |
| 2364 | /* clear status bits */ |
| 2365 | write_reg(info, SR1, status); |
| 2366 | |
| 2367 | if ( debug_level >= DEBUG_LEVEL_ISR ) |
| 2368 | printk("%s(%d):%s isr_txint status=%02x\n", |
| 2369 | __FILE__,__LINE__,info->device_name,status); |
| 2370 | |
| 2371 | if (status & (UDRN + IDLE)) |
| 2372 | isr_txeom(info, status); |
| 2373 | |
| 2374 | if (status & CCTS) { |
| 2375 | /* simulate a common modem status change interrupt |
| 2376 | * for our handler |
| 2377 | */ |
| 2378 | get_signals( info ); |
| 2379 | isr_io_pin(info, |
| 2380 | MISCSTATUS_CTS_LATCHED|(info->serial_signals&SerialSignal_CTS)); |
| 2381 | |
| 2382 | } |
| 2383 | } |
| 2384 | |
| 2385 | /* |
| 2386 | * handle async tx data interrupts |
| 2387 | */ |
| 2388 | void isr_txrdy(SLMP_INFO * info) |
| 2389 | { |
| 2390 | if ( debug_level >= DEBUG_LEVEL_ISR ) |
| 2391 | printk("%s(%d):%s isr_txrdy() tx_count=%d\n", |
| 2392 | __FILE__,__LINE__,info->device_name,info->tx_count); |
| 2393 | |
| 2394 | if (info->params.mode != MGSL_MODE_ASYNC) { |
| 2395 | /* disable TXRDY IRQ, enable IDLE IRQ */ |
| 2396 | info->ie0_value &= ~TXRDYE; |
| 2397 | info->ie1_value |= IDLE; |
| 2398 | write_reg16(info, IE0, (unsigned short)((info->ie1_value << 8) + info->ie0_value)); |
| 2399 | return; |
| 2400 | } |
| 2401 | |
| 2402 | if (info->tty && (info->tty->stopped || info->tty->hw_stopped)) { |
| 2403 | tx_stop(info); |
| 2404 | return; |
| 2405 | } |
| 2406 | |
| 2407 | if ( info->tx_count ) |
| 2408 | tx_load_fifo( info ); |
| 2409 | else { |
| 2410 | info->tx_active = 0; |
| 2411 | info->ie0_value &= ~TXRDYE; |
| 2412 | write_reg(info, IE0, info->ie0_value); |
| 2413 | } |
| 2414 | |
| 2415 | if (info->tx_count < WAKEUP_CHARS) |
| 2416 | info->pending_bh |= BH_TRANSMIT; |
| 2417 | } |
| 2418 | |
| 2419 | void isr_rxdmaok(SLMP_INFO * info) |
| 2420 | { |
| 2421 | /* BIT7 = EOT (end of transfer) |
| 2422 | * BIT6 = EOM (end of message/frame) |
| 2423 | */ |
| 2424 | unsigned char status = read_reg(info,RXDMA + DSR) & 0xc0; |
| 2425 | |
| 2426 | /* clear IRQ (BIT0 must be 1 to prevent clearing DE bit) */ |
| 2427 | write_reg(info, RXDMA + DSR, (unsigned char)(status | 1)); |
| 2428 | |
| 2429 | if ( debug_level >= DEBUG_LEVEL_ISR ) |
| 2430 | printk("%s(%d):%s isr_rxdmaok(), status=%02x\n", |
| 2431 | __FILE__,__LINE__,info->device_name,status); |
| 2432 | |
| 2433 | info->pending_bh |= BH_RECEIVE; |
| 2434 | } |
| 2435 | |
| 2436 | void isr_rxdmaerror(SLMP_INFO * info) |
| 2437 | { |
| 2438 | /* BIT5 = BOF (buffer overflow) |
| 2439 | * BIT4 = COF (counter overflow) |
| 2440 | */ |
| 2441 | unsigned char status = read_reg(info,RXDMA + DSR) & 0x30; |
| 2442 | |
| 2443 | /* clear IRQ (BIT0 must be 1 to prevent clearing DE bit) */ |
| 2444 | write_reg(info, RXDMA + DSR, (unsigned char)(status | 1)); |
| 2445 | |
| 2446 | if ( debug_level >= DEBUG_LEVEL_ISR ) |
| 2447 | printk("%s(%d):%s isr_rxdmaerror(), status=%02x\n", |
| 2448 | __FILE__,__LINE__,info->device_name,status); |
| 2449 | |
| 2450 | info->rx_overflow = TRUE; |
| 2451 | info->pending_bh |= BH_RECEIVE; |
| 2452 | } |
| 2453 | |
| 2454 | void isr_txdmaok(SLMP_INFO * info) |
| 2455 | { |
| 2456 | unsigned char status_reg1 = read_reg(info, SR1); |
| 2457 | |
| 2458 | write_reg(info, TXDMA + DIR, 0x00); /* disable Tx DMA IRQs */ |
| 2459 | write_reg(info, TXDMA + DSR, 0xc0); /* clear IRQs and disable DMA */ |
| 2460 | write_reg(info, TXDMA + DCMD, SWABORT); /* reset/init DMA channel */ |
| 2461 | |
| 2462 | if ( debug_level >= DEBUG_LEVEL_ISR ) |
| 2463 | printk("%s(%d):%s isr_txdmaok(), status=%02x\n", |
| 2464 | __FILE__,__LINE__,info->device_name,status_reg1); |
| 2465 | |
| 2466 | /* program TXRDY as FIFO empty flag, enable TXRDY IRQ */ |
| 2467 | write_reg16(info, TRC0, 0); |
| 2468 | info->ie0_value |= TXRDYE; |
| 2469 | write_reg(info, IE0, info->ie0_value); |
| 2470 | } |
| 2471 | |
| 2472 | void isr_txdmaerror(SLMP_INFO * info) |
| 2473 | { |
| 2474 | /* BIT5 = BOF (buffer overflow) |
| 2475 | * BIT4 = COF (counter overflow) |
| 2476 | */ |
| 2477 | unsigned char status = read_reg(info,TXDMA + DSR) & 0x30; |
| 2478 | |
| 2479 | /* clear IRQ (BIT0 must be 1 to prevent clearing DE bit) */ |
| 2480 | write_reg(info, TXDMA + DSR, (unsigned char)(status | 1)); |
| 2481 | |
| 2482 | if ( debug_level >= DEBUG_LEVEL_ISR ) |
| 2483 | printk("%s(%d):%s isr_txdmaerror(), status=%02x\n", |
| 2484 | __FILE__,__LINE__,info->device_name,status); |
| 2485 | } |
| 2486 | |
| 2487 | /* handle input serial signal changes |
| 2488 | */ |
| 2489 | void isr_io_pin( SLMP_INFO *info, u16 status ) |
| 2490 | { |
| 2491 | struct mgsl_icount *icount; |
| 2492 | |
| 2493 | if ( debug_level >= DEBUG_LEVEL_ISR ) |
| 2494 | printk("%s(%d):isr_io_pin status=%04X\n", |
| 2495 | __FILE__,__LINE__,status); |
| 2496 | |
| 2497 | if (status & (MISCSTATUS_CTS_LATCHED | MISCSTATUS_DCD_LATCHED | |
| 2498 | MISCSTATUS_DSR_LATCHED | MISCSTATUS_RI_LATCHED) ) { |
| 2499 | icount = &info->icount; |
| 2500 | /* update input line counters */ |
| 2501 | if (status & MISCSTATUS_RI_LATCHED) { |
| 2502 | icount->rng++; |
| 2503 | if ( status & SerialSignal_RI ) |
| 2504 | info->input_signal_events.ri_up++; |
| 2505 | else |
| 2506 | info->input_signal_events.ri_down++; |
| 2507 | } |
| 2508 | if (status & MISCSTATUS_DSR_LATCHED) { |
| 2509 | icount->dsr++; |
| 2510 | if ( status & SerialSignal_DSR ) |
| 2511 | info->input_signal_events.dsr_up++; |
| 2512 | else |
| 2513 | info->input_signal_events.dsr_down++; |
| 2514 | } |
| 2515 | if (status & MISCSTATUS_DCD_LATCHED) { |
| 2516 | if ((info->dcd_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT) { |
| 2517 | info->ie1_value &= ~CDCD; |
| 2518 | write_reg(info, IE1, info->ie1_value); |
| 2519 | } |
| 2520 | icount->dcd++; |
| 2521 | if (status & SerialSignal_DCD) { |
| 2522 | info->input_signal_events.dcd_up++; |
| 2523 | } else |
| 2524 | info->input_signal_events.dcd_down++; |
| 2525 | #ifdef CONFIG_HDLC |
| 2526 | if (info->netcount) |
| 2527 | hdlc_set_carrier(status & SerialSignal_DCD, info->netdev); |
| 2528 | #endif |
| 2529 | } |
| 2530 | if (status & MISCSTATUS_CTS_LATCHED) |
| 2531 | { |
| 2532 | if ((info->cts_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT) { |
| 2533 | info->ie1_value &= ~CCTS; |
| 2534 | write_reg(info, IE1, info->ie1_value); |
| 2535 | } |
| 2536 | icount->cts++; |
| 2537 | if ( status & SerialSignal_CTS ) |
| 2538 | info->input_signal_events.cts_up++; |
| 2539 | else |
| 2540 | info->input_signal_events.cts_down++; |
| 2541 | } |
| 2542 | wake_up_interruptible(&info->status_event_wait_q); |
| 2543 | wake_up_interruptible(&info->event_wait_q); |
| 2544 | |
| 2545 | if ( (info->flags & ASYNC_CHECK_CD) && |
| 2546 | (status & MISCSTATUS_DCD_LATCHED) ) { |
| 2547 | if ( debug_level >= DEBUG_LEVEL_ISR ) |
| 2548 | printk("%s CD now %s...", info->device_name, |
| 2549 | (status & SerialSignal_DCD) ? "on" : "off"); |
| 2550 | if (status & SerialSignal_DCD) |
| 2551 | wake_up_interruptible(&info->open_wait); |
| 2552 | else { |
| 2553 | if ( debug_level >= DEBUG_LEVEL_ISR ) |
| 2554 | printk("doing serial hangup..."); |
| 2555 | if (info->tty) |
| 2556 | tty_hangup(info->tty); |
| 2557 | } |
| 2558 | } |
| 2559 | |
| 2560 | if ( (info->flags & ASYNC_CTS_FLOW) && |
| 2561 | (status & MISCSTATUS_CTS_LATCHED) ) { |
| 2562 | if ( info->tty ) { |
| 2563 | if (info->tty->hw_stopped) { |
| 2564 | if (status & SerialSignal_CTS) { |
| 2565 | if ( debug_level >= DEBUG_LEVEL_ISR ) |
| 2566 | printk("CTS tx start..."); |
| 2567 | info->tty->hw_stopped = 0; |
| 2568 | tx_start(info); |
| 2569 | info->pending_bh |= BH_TRANSMIT; |
| 2570 | return; |
| 2571 | } |
| 2572 | } else { |
| 2573 | if (!(status & SerialSignal_CTS)) { |
| 2574 | if ( debug_level >= DEBUG_LEVEL_ISR ) |
| 2575 | printk("CTS tx stop..."); |
| 2576 | info->tty->hw_stopped = 1; |
| 2577 | tx_stop(info); |
| 2578 | } |
| 2579 | } |
| 2580 | } |
| 2581 | } |
| 2582 | } |
| 2583 | |
| 2584 | info->pending_bh |= BH_STATUS; |
| 2585 | } |
| 2586 | |
| 2587 | /* Interrupt service routine entry point. |
| 2588 | * |
| 2589 | * Arguments: |
| 2590 | * irq interrupt number that caused interrupt |
| 2591 | * dev_id device ID supplied during interrupt registration |
| 2592 | * regs interrupted processor context |
| 2593 | */ |
| 2594 | static irqreturn_t synclinkmp_interrupt(int irq, void *dev_id, |
| 2595 | struct pt_regs *regs) |
| 2596 | { |
| 2597 | SLMP_INFO * info; |
| 2598 | unsigned char status, status0, status1=0; |
| 2599 | unsigned char dmastatus, dmastatus0, dmastatus1=0; |
| 2600 | unsigned char timerstatus0, timerstatus1=0; |
| 2601 | unsigned char shift; |
| 2602 | unsigned int i; |
| 2603 | unsigned short tmp; |
| 2604 | |
| 2605 | if ( debug_level >= DEBUG_LEVEL_ISR ) |
| 2606 | printk("%s(%d): synclinkmp_interrupt(%d)entry.\n", |
| 2607 | __FILE__,__LINE__,irq); |
| 2608 | |
| 2609 | info = (SLMP_INFO *)dev_id; |
| 2610 | if (!info) |
| 2611 | return IRQ_NONE; |
| 2612 | |
| 2613 | spin_lock(&info->lock); |
| 2614 | |
| 2615 | for(;;) { |
| 2616 | |
| 2617 | /* get status for SCA0 (ports 0-1) */ |
| 2618 | tmp = read_reg16(info, ISR0); /* get ISR0 and ISR1 in one read */ |
| 2619 | status0 = (unsigned char)tmp; |
| 2620 | dmastatus0 = (unsigned char)(tmp>>8); |
| 2621 | timerstatus0 = read_reg(info, ISR2); |
| 2622 | |
| 2623 | if ( debug_level >= DEBUG_LEVEL_ISR ) |
| 2624 | printk("%s(%d):%s status0=%02x, dmastatus0=%02x, timerstatus0=%02x\n", |
| 2625 | __FILE__,__LINE__,info->device_name, |
| 2626 | status0,dmastatus0,timerstatus0); |
| 2627 | |
| 2628 | if (info->port_count == 4) { |
| 2629 | /* get status for SCA1 (ports 2-3) */ |
| 2630 | tmp = read_reg16(info->port_array[2], ISR0); |
| 2631 | status1 = (unsigned char)tmp; |
| 2632 | dmastatus1 = (unsigned char)(tmp>>8); |
| 2633 | timerstatus1 = read_reg(info->port_array[2], ISR2); |
| 2634 | |
| 2635 | if ( debug_level >= DEBUG_LEVEL_ISR ) |
| 2636 | printk("%s(%d):%s status1=%02x, dmastatus1=%02x, timerstatus1=%02x\n", |
| 2637 | __FILE__,__LINE__,info->device_name, |
| 2638 | status1,dmastatus1,timerstatus1); |
| 2639 | } |
| 2640 | |
| 2641 | if (!status0 && !dmastatus0 && !timerstatus0 && |
| 2642 | !status1 && !dmastatus1 && !timerstatus1) |
| 2643 | break; |
| 2644 | |
| 2645 | for(i=0; i < info->port_count ; i++) { |
| 2646 | if (info->port_array[i] == NULL) |
| 2647 | continue; |
| 2648 | if (i < 2) { |
| 2649 | status = status0; |
| 2650 | dmastatus = dmastatus0; |
| 2651 | } else { |
| 2652 | status = status1; |
| 2653 | dmastatus = dmastatus1; |
| 2654 | } |
| 2655 | |
| 2656 | shift = i & 1 ? 4 :0; |
| 2657 | |
| 2658 | if (status & BIT0 << shift) |
| 2659 | isr_rxrdy(info->port_array[i]); |
| 2660 | if (status & BIT1 << shift) |
| 2661 | isr_txrdy(info->port_array[i]); |
| 2662 | if (status & BIT2 << shift) |
| 2663 | isr_rxint(info->port_array[i]); |
| 2664 | if (status & BIT3 << shift) |
| 2665 | isr_txint(info->port_array[i]); |
| 2666 | |
| 2667 | if (dmastatus & BIT0 << shift) |
| 2668 | isr_rxdmaerror(info->port_array[i]); |
| 2669 | if (dmastatus & BIT1 << shift) |
| 2670 | isr_rxdmaok(info->port_array[i]); |
| 2671 | if (dmastatus & BIT2 << shift) |
| 2672 | isr_txdmaerror(info->port_array[i]); |
| 2673 | if (dmastatus & BIT3 << shift) |
| 2674 | isr_txdmaok(info->port_array[i]); |
| 2675 | } |
| 2676 | |
| 2677 | if (timerstatus0 & (BIT5 | BIT4)) |
| 2678 | isr_timer(info->port_array[0]); |
| 2679 | if (timerstatus0 & (BIT7 | BIT6)) |
| 2680 | isr_timer(info->port_array[1]); |
| 2681 | if (timerstatus1 & (BIT5 | BIT4)) |
| 2682 | isr_timer(info->port_array[2]); |
| 2683 | if (timerstatus1 & (BIT7 | BIT6)) |
| 2684 | isr_timer(info->port_array[3]); |
| 2685 | } |
| 2686 | |
| 2687 | for(i=0; i < info->port_count ; i++) { |
| 2688 | SLMP_INFO * port = info->port_array[i]; |
| 2689 | |
| 2690 | /* Request bottom half processing if there's something |
| 2691 | * for it to do and the bh is not already running. |
| 2692 | * |
| 2693 | * Note: startup adapter diags require interrupts. |
| 2694 | * do not request bottom half processing if the |
| 2695 | * device is not open in a normal mode. |
| 2696 | */ |
| 2697 | if ( port && (port->count || port->netcount) && |
| 2698 | port->pending_bh && !port->bh_running && |
| 2699 | !port->bh_requested ) { |
| 2700 | if ( debug_level >= DEBUG_LEVEL_ISR ) |
| 2701 | printk("%s(%d):%s queueing bh task.\n", |
| 2702 | __FILE__,__LINE__,port->device_name); |
| 2703 | schedule_work(&port->task); |
| 2704 | port->bh_requested = 1; |
| 2705 | } |
| 2706 | } |
| 2707 | |
| 2708 | spin_unlock(&info->lock); |
| 2709 | |
| 2710 | if ( debug_level >= DEBUG_LEVEL_ISR ) |
| 2711 | printk("%s(%d):synclinkmp_interrupt(%d)exit.\n", |
| 2712 | __FILE__,__LINE__,irq); |
| 2713 | return IRQ_HANDLED; |
| 2714 | } |
| 2715 | |
| 2716 | /* Initialize and start device. |
| 2717 | */ |
| 2718 | static int startup(SLMP_INFO * info) |
| 2719 | { |
| 2720 | if ( debug_level >= DEBUG_LEVEL_INFO ) |
| 2721 | printk("%s(%d):%s tx_releaseup()\n",__FILE__,__LINE__,info->device_name); |
| 2722 | |
| 2723 | if (info->flags & ASYNC_INITIALIZED) |
| 2724 | return 0; |
| 2725 | |
| 2726 | if (!info->tx_buf) { |
| 2727 | info->tx_buf = (unsigned char *)kmalloc(info->max_frame_size, GFP_KERNEL); |
| 2728 | if (!info->tx_buf) { |
| 2729 | printk(KERN_ERR"%s(%d):%s can't allocate transmit buffer\n", |
| 2730 | __FILE__,__LINE__,info->device_name); |
| 2731 | return -ENOMEM; |
| 2732 | } |
| 2733 | } |
| 2734 | |
| 2735 | info->pending_bh = 0; |
| 2736 | |
Paul Fulghum | 166692e | 2005-09-09 13:02:16 -0700 | [diff] [blame] | 2737 | memset(&info->icount, 0, sizeof(info->icount)); |
| 2738 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2739 | /* program hardware for current parameters */ |
| 2740 | reset_port(info); |
| 2741 | |
| 2742 | change_params(info); |
| 2743 | |
| 2744 | info->status_timer.expires = jiffies + msecs_to_jiffies(10); |
| 2745 | add_timer(&info->status_timer); |
| 2746 | |
| 2747 | if (info->tty) |
| 2748 | clear_bit(TTY_IO_ERROR, &info->tty->flags); |
| 2749 | |
| 2750 | info->flags |= ASYNC_INITIALIZED; |
| 2751 | |
| 2752 | return 0; |
| 2753 | } |
| 2754 | |
| 2755 | /* Called by close() and hangup() to shutdown hardware |
| 2756 | */ |
| 2757 | static void shutdown(SLMP_INFO * info) |
| 2758 | { |
| 2759 | unsigned long flags; |
| 2760 | |
| 2761 | if (!(info->flags & ASYNC_INITIALIZED)) |
| 2762 | return; |
| 2763 | |
| 2764 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 2765 | printk("%s(%d):%s synclinkmp_shutdown()\n", |
| 2766 | __FILE__,__LINE__, info->device_name ); |
| 2767 | |
| 2768 | /* clear status wait queue because status changes */ |
| 2769 | /* can't happen after shutting down the hardware */ |
| 2770 | wake_up_interruptible(&info->status_event_wait_q); |
| 2771 | wake_up_interruptible(&info->event_wait_q); |
| 2772 | |
| 2773 | del_timer(&info->tx_timer); |
| 2774 | del_timer(&info->status_timer); |
| 2775 | |
Jesper Juhl | 735d566 | 2005-11-07 01:01:29 -0800 | [diff] [blame] | 2776 | kfree(info->tx_buf); |
| 2777 | info->tx_buf = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2778 | |
| 2779 | spin_lock_irqsave(&info->lock,flags); |
| 2780 | |
| 2781 | reset_port(info); |
| 2782 | |
| 2783 | if (!info->tty || info->tty->termios->c_cflag & HUPCL) { |
| 2784 | info->serial_signals &= ~(SerialSignal_DTR + SerialSignal_RTS); |
| 2785 | set_signals(info); |
| 2786 | } |
| 2787 | |
| 2788 | spin_unlock_irqrestore(&info->lock,flags); |
| 2789 | |
| 2790 | if (info->tty) |
| 2791 | set_bit(TTY_IO_ERROR, &info->tty->flags); |
| 2792 | |
| 2793 | info->flags &= ~ASYNC_INITIALIZED; |
| 2794 | } |
| 2795 | |
| 2796 | static void program_hw(SLMP_INFO *info) |
| 2797 | { |
| 2798 | unsigned long flags; |
| 2799 | |
| 2800 | spin_lock_irqsave(&info->lock,flags); |
| 2801 | |
| 2802 | rx_stop(info); |
| 2803 | tx_stop(info); |
| 2804 | |
| 2805 | info->tx_count = info->tx_put = info->tx_get = 0; |
| 2806 | |
| 2807 | if (info->params.mode == MGSL_MODE_HDLC || info->netcount) |
| 2808 | hdlc_mode(info); |
| 2809 | else |
| 2810 | async_mode(info); |
| 2811 | |
| 2812 | set_signals(info); |
| 2813 | |
| 2814 | info->dcd_chkcount = 0; |
| 2815 | info->cts_chkcount = 0; |
| 2816 | info->ri_chkcount = 0; |
| 2817 | info->dsr_chkcount = 0; |
| 2818 | |
| 2819 | info->ie1_value |= (CDCD|CCTS); |
| 2820 | write_reg(info, IE1, info->ie1_value); |
| 2821 | |
| 2822 | get_signals(info); |
| 2823 | |
| 2824 | if (info->netcount || (info->tty && info->tty->termios->c_cflag & CREAD) ) |
| 2825 | rx_start(info); |
| 2826 | |
| 2827 | spin_unlock_irqrestore(&info->lock,flags); |
| 2828 | } |
| 2829 | |
| 2830 | /* Reconfigure adapter based on new parameters |
| 2831 | */ |
| 2832 | static void change_params(SLMP_INFO *info) |
| 2833 | { |
| 2834 | unsigned cflag; |
| 2835 | int bits_per_char; |
| 2836 | |
| 2837 | if (!info->tty || !info->tty->termios) |
| 2838 | return; |
| 2839 | |
| 2840 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 2841 | printk("%s(%d):%s change_params()\n", |
| 2842 | __FILE__,__LINE__, info->device_name ); |
| 2843 | |
| 2844 | cflag = info->tty->termios->c_cflag; |
| 2845 | |
| 2846 | /* if B0 rate (hangup) specified then negate DTR and RTS */ |
| 2847 | /* otherwise assert DTR and RTS */ |
| 2848 | if (cflag & CBAUD) |
| 2849 | info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR; |
| 2850 | else |
| 2851 | info->serial_signals &= ~(SerialSignal_RTS + SerialSignal_DTR); |
| 2852 | |
| 2853 | /* byte size and parity */ |
| 2854 | |
| 2855 | switch (cflag & CSIZE) { |
| 2856 | case CS5: info->params.data_bits = 5; break; |
| 2857 | case CS6: info->params.data_bits = 6; break; |
| 2858 | case CS7: info->params.data_bits = 7; break; |
| 2859 | case CS8: info->params.data_bits = 8; break; |
| 2860 | /* Never happens, but GCC is too dumb to figure it out */ |
| 2861 | default: info->params.data_bits = 7; break; |
| 2862 | } |
| 2863 | |
| 2864 | if (cflag & CSTOPB) |
| 2865 | info->params.stop_bits = 2; |
| 2866 | else |
| 2867 | info->params.stop_bits = 1; |
| 2868 | |
| 2869 | info->params.parity = ASYNC_PARITY_NONE; |
| 2870 | if (cflag & PARENB) { |
| 2871 | if (cflag & PARODD) |
| 2872 | info->params.parity = ASYNC_PARITY_ODD; |
| 2873 | else |
| 2874 | info->params.parity = ASYNC_PARITY_EVEN; |
| 2875 | #ifdef CMSPAR |
| 2876 | if (cflag & CMSPAR) |
| 2877 | info->params.parity = ASYNC_PARITY_SPACE; |
| 2878 | #endif |
| 2879 | } |
| 2880 | |
| 2881 | /* calculate number of jiffies to transmit a full |
| 2882 | * FIFO (32 bytes) at specified data rate |
| 2883 | */ |
| 2884 | bits_per_char = info->params.data_bits + |
| 2885 | info->params.stop_bits + 1; |
| 2886 | |
| 2887 | /* if port data rate is set to 460800 or less then |
| 2888 | * allow tty settings to override, otherwise keep the |
| 2889 | * current data rate. |
| 2890 | */ |
| 2891 | if (info->params.data_rate <= 460800) { |
| 2892 | info->params.data_rate = tty_get_baud_rate(info->tty); |
| 2893 | } |
| 2894 | |
| 2895 | if ( info->params.data_rate ) { |
| 2896 | info->timeout = (32*HZ*bits_per_char) / |
| 2897 | info->params.data_rate; |
| 2898 | } |
| 2899 | info->timeout += HZ/50; /* Add .02 seconds of slop */ |
| 2900 | |
| 2901 | if (cflag & CRTSCTS) |
| 2902 | info->flags |= ASYNC_CTS_FLOW; |
| 2903 | else |
| 2904 | info->flags &= ~ASYNC_CTS_FLOW; |
| 2905 | |
| 2906 | if (cflag & CLOCAL) |
| 2907 | info->flags &= ~ASYNC_CHECK_CD; |
| 2908 | else |
| 2909 | info->flags |= ASYNC_CHECK_CD; |
| 2910 | |
| 2911 | /* process tty input control flags */ |
| 2912 | |
| 2913 | info->read_status_mask2 = OVRN; |
| 2914 | if (I_INPCK(info->tty)) |
| 2915 | info->read_status_mask2 |= PE | FRME; |
| 2916 | if (I_BRKINT(info->tty) || I_PARMRK(info->tty)) |
| 2917 | info->read_status_mask1 |= BRKD; |
| 2918 | if (I_IGNPAR(info->tty)) |
| 2919 | info->ignore_status_mask2 |= PE | FRME; |
| 2920 | if (I_IGNBRK(info->tty)) { |
| 2921 | info->ignore_status_mask1 |= BRKD; |
| 2922 | /* If ignoring parity and break indicators, ignore |
| 2923 | * overruns too. (For real raw support). |
| 2924 | */ |
| 2925 | if (I_IGNPAR(info->tty)) |
| 2926 | info->ignore_status_mask2 |= OVRN; |
| 2927 | } |
| 2928 | |
| 2929 | program_hw(info); |
| 2930 | } |
| 2931 | |
| 2932 | static int get_stats(SLMP_INFO * info, struct mgsl_icount __user *user_icount) |
| 2933 | { |
| 2934 | int err; |
| 2935 | |
| 2936 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 2937 | printk("%s(%d):%s get_params()\n", |
| 2938 | __FILE__,__LINE__, info->device_name); |
| 2939 | |
Paul Fulghum | 166692e | 2005-09-09 13:02:16 -0700 | [diff] [blame] | 2940 | if (!user_icount) { |
| 2941 | memset(&info->icount, 0, sizeof(info->icount)); |
| 2942 | } else { |
| 2943 | COPY_TO_USER(err, user_icount, &info->icount, sizeof(struct mgsl_icount)); |
| 2944 | if (err) |
| 2945 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2946 | } |
| 2947 | |
| 2948 | return 0; |
| 2949 | } |
| 2950 | |
| 2951 | static int get_params(SLMP_INFO * info, MGSL_PARAMS __user *user_params) |
| 2952 | { |
| 2953 | int err; |
| 2954 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 2955 | printk("%s(%d):%s get_params()\n", |
| 2956 | __FILE__,__LINE__, info->device_name); |
| 2957 | |
| 2958 | COPY_TO_USER(err,user_params, &info->params, sizeof(MGSL_PARAMS)); |
| 2959 | if (err) { |
| 2960 | if ( debug_level >= DEBUG_LEVEL_INFO ) |
| 2961 | printk( "%s(%d):%s get_params() user buffer copy failed\n", |
| 2962 | __FILE__,__LINE__,info->device_name); |
| 2963 | return -EFAULT; |
| 2964 | } |
| 2965 | |
| 2966 | return 0; |
| 2967 | } |
| 2968 | |
| 2969 | static int set_params(SLMP_INFO * info, MGSL_PARAMS __user *new_params) |
| 2970 | { |
| 2971 | unsigned long flags; |
| 2972 | MGSL_PARAMS tmp_params; |
| 2973 | int err; |
| 2974 | |
| 2975 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 2976 | printk("%s(%d):%s set_params\n", |
| 2977 | __FILE__,__LINE__,info->device_name ); |
| 2978 | COPY_FROM_USER(err,&tmp_params, new_params, sizeof(MGSL_PARAMS)); |
| 2979 | if (err) { |
| 2980 | if ( debug_level >= DEBUG_LEVEL_INFO ) |
| 2981 | printk( "%s(%d):%s set_params() user buffer copy failed\n", |
| 2982 | __FILE__,__LINE__,info->device_name); |
| 2983 | return -EFAULT; |
| 2984 | } |
| 2985 | |
| 2986 | spin_lock_irqsave(&info->lock,flags); |
| 2987 | memcpy(&info->params,&tmp_params,sizeof(MGSL_PARAMS)); |
| 2988 | spin_unlock_irqrestore(&info->lock,flags); |
| 2989 | |
| 2990 | change_params(info); |
| 2991 | |
| 2992 | return 0; |
| 2993 | } |
| 2994 | |
| 2995 | static int get_txidle(SLMP_INFO * info, int __user *idle_mode) |
| 2996 | { |
| 2997 | int err; |
| 2998 | |
| 2999 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 3000 | printk("%s(%d):%s get_txidle()=%d\n", |
| 3001 | __FILE__,__LINE__, info->device_name, info->idle_mode); |
| 3002 | |
| 3003 | COPY_TO_USER(err,idle_mode, &info->idle_mode, sizeof(int)); |
| 3004 | if (err) { |
| 3005 | if ( debug_level >= DEBUG_LEVEL_INFO ) |
| 3006 | printk( "%s(%d):%s get_txidle() user buffer copy failed\n", |
| 3007 | __FILE__,__LINE__,info->device_name); |
| 3008 | return -EFAULT; |
| 3009 | } |
| 3010 | |
| 3011 | return 0; |
| 3012 | } |
| 3013 | |
| 3014 | static int set_txidle(SLMP_INFO * info, int idle_mode) |
| 3015 | { |
| 3016 | unsigned long flags; |
| 3017 | |
| 3018 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 3019 | printk("%s(%d):%s set_txidle(%d)\n", |
| 3020 | __FILE__,__LINE__,info->device_name, idle_mode ); |
| 3021 | |
| 3022 | spin_lock_irqsave(&info->lock,flags); |
| 3023 | info->idle_mode = idle_mode; |
| 3024 | tx_set_idle( info ); |
| 3025 | spin_unlock_irqrestore(&info->lock,flags); |
| 3026 | return 0; |
| 3027 | } |
| 3028 | |
| 3029 | static int tx_enable(SLMP_INFO * info, int enable) |
| 3030 | { |
| 3031 | unsigned long flags; |
| 3032 | |
| 3033 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 3034 | printk("%s(%d):%s tx_enable(%d)\n", |
| 3035 | __FILE__,__LINE__,info->device_name, enable); |
| 3036 | |
| 3037 | spin_lock_irqsave(&info->lock,flags); |
| 3038 | if ( enable ) { |
| 3039 | if ( !info->tx_enabled ) { |
| 3040 | tx_start(info); |
| 3041 | } |
| 3042 | } else { |
| 3043 | if ( info->tx_enabled ) |
| 3044 | tx_stop(info); |
| 3045 | } |
| 3046 | spin_unlock_irqrestore(&info->lock,flags); |
| 3047 | return 0; |
| 3048 | } |
| 3049 | |
| 3050 | /* abort send HDLC frame |
| 3051 | */ |
| 3052 | static int tx_abort(SLMP_INFO * info) |
| 3053 | { |
| 3054 | unsigned long flags; |
| 3055 | |
| 3056 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 3057 | printk("%s(%d):%s tx_abort()\n", |
| 3058 | __FILE__,__LINE__,info->device_name); |
| 3059 | |
| 3060 | spin_lock_irqsave(&info->lock,flags); |
| 3061 | if ( info->tx_active && info->params.mode == MGSL_MODE_HDLC ) { |
| 3062 | info->ie1_value &= ~UDRN; |
| 3063 | info->ie1_value |= IDLE; |
| 3064 | write_reg(info, IE1, info->ie1_value); /* disable tx status interrupts */ |
| 3065 | write_reg(info, SR1, (unsigned char)(IDLE + UDRN)); /* clear pending */ |
| 3066 | |
| 3067 | write_reg(info, TXDMA + DSR, 0); /* disable DMA channel */ |
| 3068 | write_reg(info, TXDMA + DCMD, SWABORT); /* reset/init DMA channel */ |
| 3069 | |
| 3070 | write_reg(info, CMD, TXABORT); |
| 3071 | } |
| 3072 | spin_unlock_irqrestore(&info->lock,flags); |
| 3073 | return 0; |
| 3074 | } |
| 3075 | |
| 3076 | static int rx_enable(SLMP_INFO * info, int enable) |
| 3077 | { |
| 3078 | unsigned long flags; |
| 3079 | |
| 3080 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 3081 | printk("%s(%d):%s rx_enable(%d)\n", |
| 3082 | __FILE__,__LINE__,info->device_name,enable); |
| 3083 | |
| 3084 | spin_lock_irqsave(&info->lock,flags); |
| 3085 | if ( enable ) { |
| 3086 | if ( !info->rx_enabled ) |
| 3087 | rx_start(info); |
| 3088 | } else { |
| 3089 | if ( info->rx_enabled ) |
| 3090 | rx_stop(info); |
| 3091 | } |
| 3092 | spin_unlock_irqrestore(&info->lock,flags); |
| 3093 | return 0; |
| 3094 | } |
| 3095 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3096 | /* wait for specified event to occur |
| 3097 | */ |
| 3098 | static int wait_mgsl_event(SLMP_INFO * info, int __user *mask_ptr) |
| 3099 | { |
| 3100 | unsigned long flags; |
| 3101 | int s; |
| 3102 | int rc=0; |
| 3103 | struct mgsl_icount cprev, cnow; |
| 3104 | int events; |
| 3105 | int mask; |
| 3106 | struct _input_signal_events oldsigs, newsigs; |
| 3107 | DECLARE_WAITQUEUE(wait, current); |
| 3108 | |
| 3109 | COPY_FROM_USER(rc,&mask, mask_ptr, sizeof(int)); |
| 3110 | if (rc) { |
| 3111 | return -EFAULT; |
| 3112 | } |
| 3113 | |
| 3114 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 3115 | printk("%s(%d):%s wait_mgsl_event(%d)\n", |
| 3116 | __FILE__,__LINE__,info->device_name,mask); |
| 3117 | |
| 3118 | spin_lock_irqsave(&info->lock,flags); |
| 3119 | |
| 3120 | /* return immediately if state matches requested events */ |
| 3121 | get_signals(info); |
Paul Fulghum | 7f3edb9 | 2005-09-09 13:02:14 -0700 | [diff] [blame] | 3122 | s = info->serial_signals; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3123 | |
| 3124 | events = mask & |
| 3125 | ( ((s & SerialSignal_DSR) ? MgslEvent_DsrActive:MgslEvent_DsrInactive) + |
| 3126 | ((s & SerialSignal_DCD) ? MgslEvent_DcdActive:MgslEvent_DcdInactive) + |
| 3127 | ((s & SerialSignal_CTS) ? MgslEvent_CtsActive:MgslEvent_CtsInactive) + |
| 3128 | ((s & SerialSignal_RI) ? MgslEvent_RiActive :MgslEvent_RiInactive) ); |
| 3129 | if (events) { |
| 3130 | spin_unlock_irqrestore(&info->lock,flags); |
| 3131 | goto exit; |
| 3132 | } |
| 3133 | |
| 3134 | /* save current irq counts */ |
| 3135 | cprev = info->icount; |
| 3136 | oldsigs = info->input_signal_events; |
| 3137 | |
| 3138 | /* enable hunt and idle irqs if needed */ |
| 3139 | if (mask & (MgslEvent_ExitHuntMode+MgslEvent_IdleReceived)) { |
| 3140 | unsigned char oldval = info->ie1_value; |
| 3141 | unsigned char newval = oldval + |
| 3142 | (mask & MgslEvent_ExitHuntMode ? FLGD:0) + |
| 3143 | (mask & MgslEvent_IdleReceived ? IDLD:0); |
| 3144 | if ( oldval != newval ) { |
| 3145 | info->ie1_value = newval; |
| 3146 | write_reg(info, IE1, info->ie1_value); |
| 3147 | } |
| 3148 | } |
| 3149 | |
| 3150 | set_current_state(TASK_INTERRUPTIBLE); |
| 3151 | add_wait_queue(&info->event_wait_q, &wait); |
| 3152 | |
| 3153 | spin_unlock_irqrestore(&info->lock,flags); |
| 3154 | |
| 3155 | for(;;) { |
| 3156 | schedule(); |
| 3157 | if (signal_pending(current)) { |
| 3158 | rc = -ERESTARTSYS; |
| 3159 | break; |
| 3160 | } |
| 3161 | |
| 3162 | /* get current irq counts */ |
| 3163 | spin_lock_irqsave(&info->lock,flags); |
| 3164 | cnow = info->icount; |
| 3165 | newsigs = info->input_signal_events; |
| 3166 | set_current_state(TASK_INTERRUPTIBLE); |
| 3167 | spin_unlock_irqrestore(&info->lock,flags); |
| 3168 | |
| 3169 | /* if no change, wait aborted for some reason */ |
| 3170 | if (newsigs.dsr_up == oldsigs.dsr_up && |
| 3171 | newsigs.dsr_down == oldsigs.dsr_down && |
| 3172 | newsigs.dcd_up == oldsigs.dcd_up && |
| 3173 | newsigs.dcd_down == oldsigs.dcd_down && |
| 3174 | newsigs.cts_up == oldsigs.cts_up && |
| 3175 | newsigs.cts_down == oldsigs.cts_down && |
| 3176 | newsigs.ri_up == oldsigs.ri_up && |
| 3177 | newsigs.ri_down == oldsigs.ri_down && |
| 3178 | cnow.exithunt == cprev.exithunt && |
| 3179 | cnow.rxidle == cprev.rxidle) { |
| 3180 | rc = -EIO; |
| 3181 | break; |
| 3182 | } |
| 3183 | |
| 3184 | events = mask & |
| 3185 | ( (newsigs.dsr_up != oldsigs.dsr_up ? MgslEvent_DsrActive:0) + |
| 3186 | (newsigs.dsr_down != oldsigs.dsr_down ? MgslEvent_DsrInactive:0) + |
| 3187 | (newsigs.dcd_up != oldsigs.dcd_up ? MgslEvent_DcdActive:0) + |
| 3188 | (newsigs.dcd_down != oldsigs.dcd_down ? MgslEvent_DcdInactive:0) + |
| 3189 | (newsigs.cts_up != oldsigs.cts_up ? MgslEvent_CtsActive:0) + |
| 3190 | (newsigs.cts_down != oldsigs.cts_down ? MgslEvent_CtsInactive:0) + |
| 3191 | (newsigs.ri_up != oldsigs.ri_up ? MgslEvent_RiActive:0) + |
| 3192 | (newsigs.ri_down != oldsigs.ri_down ? MgslEvent_RiInactive:0) + |
| 3193 | (cnow.exithunt != cprev.exithunt ? MgslEvent_ExitHuntMode:0) + |
| 3194 | (cnow.rxidle != cprev.rxidle ? MgslEvent_IdleReceived:0) ); |
| 3195 | if (events) |
| 3196 | break; |
| 3197 | |
| 3198 | cprev = cnow; |
| 3199 | oldsigs = newsigs; |
| 3200 | } |
| 3201 | |
| 3202 | remove_wait_queue(&info->event_wait_q, &wait); |
| 3203 | set_current_state(TASK_RUNNING); |
| 3204 | |
| 3205 | |
| 3206 | if (mask & (MgslEvent_ExitHuntMode + MgslEvent_IdleReceived)) { |
| 3207 | spin_lock_irqsave(&info->lock,flags); |
| 3208 | if (!waitqueue_active(&info->event_wait_q)) { |
| 3209 | /* disable enable exit hunt mode/idle rcvd IRQs */ |
| 3210 | info->ie1_value &= ~(FLGD|IDLD); |
| 3211 | write_reg(info, IE1, info->ie1_value); |
| 3212 | } |
| 3213 | spin_unlock_irqrestore(&info->lock,flags); |
| 3214 | } |
| 3215 | exit: |
| 3216 | if ( rc == 0 ) |
| 3217 | PUT_USER(rc, events, mask_ptr); |
| 3218 | |
| 3219 | return rc; |
| 3220 | } |
| 3221 | |
| 3222 | static int modem_input_wait(SLMP_INFO *info,int arg) |
| 3223 | { |
| 3224 | unsigned long flags; |
| 3225 | int rc; |
| 3226 | struct mgsl_icount cprev, cnow; |
| 3227 | DECLARE_WAITQUEUE(wait, current); |
| 3228 | |
| 3229 | /* save current irq counts */ |
| 3230 | spin_lock_irqsave(&info->lock,flags); |
| 3231 | cprev = info->icount; |
| 3232 | add_wait_queue(&info->status_event_wait_q, &wait); |
| 3233 | set_current_state(TASK_INTERRUPTIBLE); |
| 3234 | spin_unlock_irqrestore(&info->lock,flags); |
| 3235 | |
| 3236 | for(;;) { |
| 3237 | schedule(); |
| 3238 | if (signal_pending(current)) { |
| 3239 | rc = -ERESTARTSYS; |
| 3240 | break; |
| 3241 | } |
| 3242 | |
| 3243 | /* get new irq counts */ |
| 3244 | spin_lock_irqsave(&info->lock,flags); |
| 3245 | cnow = info->icount; |
| 3246 | set_current_state(TASK_INTERRUPTIBLE); |
| 3247 | spin_unlock_irqrestore(&info->lock,flags); |
| 3248 | |
| 3249 | /* if no change, wait aborted for some reason */ |
| 3250 | if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && |
| 3251 | cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) { |
| 3252 | rc = -EIO; |
| 3253 | break; |
| 3254 | } |
| 3255 | |
| 3256 | /* check for change in caller specified modem input */ |
| 3257 | if ((arg & TIOCM_RNG && cnow.rng != cprev.rng) || |
| 3258 | (arg & TIOCM_DSR && cnow.dsr != cprev.dsr) || |
| 3259 | (arg & TIOCM_CD && cnow.dcd != cprev.dcd) || |
| 3260 | (arg & TIOCM_CTS && cnow.cts != cprev.cts)) { |
| 3261 | rc = 0; |
| 3262 | break; |
| 3263 | } |
| 3264 | |
| 3265 | cprev = cnow; |
| 3266 | } |
| 3267 | remove_wait_queue(&info->status_event_wait_q, &wait); |
| 3268 | set_current_state(TASK_RUNNING); |
| 3269 | return rc; |
| 3270 | } |
| 3271 | |
| 3272 | /* return the state of the serial control and status signals |
| 3273 | */ |
| 3274 | static int tiocmget(struct tty_struct *tty, struct file *file) |
| 3275 | { |
| 3276 | SLMP_INFO *info = (SLMP_INFO *)tty->driver_data; |
| 3277 | unsigned int result; |
| 3278 | unsigned long flags; |
| 3279 | |
| 3280 | spin_lock_irqsave(&info->lock,flags); |
| 3281 | get_signals(info); |
| 3282 | spin_unlock_irqrestore(&info->lock,flags); |
| 3283 | |
| 3284 | result = ((info->serial_signals & SerialSignal_RTS) ? TIOCM_RTS:0) + |
| 3285 | ((info->serial_signals & SerialSignal_DTR) ? TIOCM_DTR:0) + |
| 3286 | ((info->serial_signals & SerialSignal_DCD) ? TIOCM_CAR:0) + |
| 3287 | ((info->serial_signals & SerialSignal_RI) ? TIOCM_RNG:0) + |
| 3288 | ((info->serial_signals & SerialSignal_DSR) ? TIOCM_DSR:0) + |
| 3289 | ((info->serial_signals & SerialSignal_CTS) ? TIOCM_CTS:0); |
| 3290 | |
| 3291 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 3292 | printk("%s(%d):%s tiocmget() value=%08X\n", |
| 3293 | __FILE__,__LINE__, info->device_name, result ); |
| 3294 | return result; |
| 3295 | } |
| 3296 | |
| 3297 | /* set modem control signals (DTR/RTS) |
| 3298 | */ |
| 3299 | static int tiocmset(struct tty_struct *tty, struct file *file, |
| 3300 | unsigned int set, unsigned int clear) |
| 3301 | { |
| 3302 | SLMP_INFO *info = (SLMP_INFO *)tty->driver_data; |
| 3303 | unsigned long flags; |
| 3304 | |
| 3305 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 3306 | printk("%s(%d):%s tiocmset(%x,%x)\n", |
| 3307 | __FILE__,__LINE__,info->device_name, set, clear); |
| 3308 | |
| 3309 | if (set & TIOCM_RTS) |
| 3310 | info->serial_signals |= SerialSignal_RTS; |
| 3311 | if (set & TIOCM_DTR) |
| 3312 | info->serial_signals |= SerialSignal_DTR; |
| 3313 | if (clear & TIOCM_RTS) |
| 3314 | info->serial_signals &= ~SerialSignal_RTS; |
| 3315 | if (clear & TIOCM_DTR) |
| 3316 | info->serial_signals &= ~SerialSignal_DTR; |
| 3317 | |
| 3318 | spin_lock_irqsave(&info->lock,flags); |
| 3319 | set_signals(info); |
| 3320 | spin_unlock_irqrestore(&info->lock,flags); |
| 3321 | |
| 3322 | return 0; |
| 3323 | } |
| 3324 | |
| 3325 | |
| 3326 | |
| 3327 | /* Block the current process until the specified port is ready to open. |
| 3328 | */ |
| 3329 | static int block_til_ready(struct tty_struct *tty, struct file *filp, |
| 3330 | SLMP_INFO *info) |
| 3331 | { |
| 3332 | DECLARE_WAITQUEUE(wait, current); |
| 3333 | int retval; |
| 3334 | int do_clocal = 0, extra_count = 0; |
| 3335 | unsigned long flags; |
| 3336 | |
| 3337 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 3338 | printk("%s(%d):%s block_til_ready()\n", |
| 3339 | __FILE__,__LINE__, tty->driver->name ); |
| 3340 | |
| 3341 | if (filp->f_flags & O_NONBLOCK || tty->flags & (1 << TTY_IO_ERROR)){ |
| 3342 | /* nonblock mode is set or port is not enabled */ |
| 3343 | /* just verify that callout device is not active */ |
| 3344 | info->flags |= ASYNC_NORMAL_ACTIVE; |
| 3345 | return 0; |
| 3346 | } |
| 3347 | |
| 3348 | if (tty->termios->c_cflag & CLOCAL) |
| 3349 | do_clocal = 1; |
| 3350 | |
| 3351 | /* Wait for carrier detect and the line to become |
| 3352 | * free (i.e., not in use by the callout). While we are in |
| 3353 | * this loop, info->count is dropped by one, so that |
| 3354 | * close() knows when to free things. We restore it upon |
| 3355 | * exit, either normal or abnormal. |
| 3356 | */ |
| 3357 | |
| 3358 | retval = 0; |
| 3359 | add_wait_queue(&info->open_wait, &wait); |
| 3360 | |
| 3361 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 3362 | printk("%s(%d):%s block_til_ready() before block, count=%d\n", |
| 3363 | __FILE__,__LINE__, tty->driver->name, info->count ); |
| 3364 | |
| 3365 | spin_lock_irqsave(&info->lock, flags); |
| 3366 | if (!tty_hung_up_p(filp)) { |
| 3367 | extra_count = 1; |
| 3368 | info->count--; |
| 3369 | } |
| 3370 | spin_unlock_irqrestore(&info->lock, flags); |
| 3371 | info->blocked_open++; |
| 3372 | |
| 3373 | while (1) { |
| 3374 | if ((tty->termios->c_cflag & CBAUD)) { |
| 3375 | spin_lock_irqsave(&info->lock,flags); |
| 3376 | info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR; |
| 3377 | set_signals(info); |
| 3378 | spin_unlock_irqrestore(&info->lock,flags); |
| 3379 | } |
| 3380 | |
| 3381 | set_current_state(TASK_INTERRUPTIBLE); |
| 3382 | |
| 3383 | if (tty_hung_up_p(filp) || !(info->flags & ASYNC_INITIALIZED)){ |
| 3384 | retval = (info->flags & ASYNC_HUP_NOTIFY) ? |
| 3385 | -EAGAIN : -ERESTARTSYS; |
| 3386 | break; |
| 3387 | } |
| 3388 | |
| 3389 | spin_lock_irqsave(&info->lock,flags); |
| 3390 | get_signals(info); |
| 3391 | spin_unlock_irqrestore(&info->lock,flags); |
| 3392 | |
| 3393 | if (!(info->flags & ASYNC_CLOSING) && |
| 3394 | (do_clocal || (info->serial_signals & SerialSignal_DCD)) ) { |
| 3395 | break; |
| 3396 | } |
| 3397 | |
| 3398 | if (signal_pending(current)) { |
| 3399 | retval = -ERESTARTSYS; |
| 3400 | break; |
| 3401 | } |
| 3402 | |
| 3403 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 3404 | printk("%s(%d):%s block_til_ready() count=%d\n", |
| 3405 | __FILE__,__LINE__, tty->driver->name, info->count ); |
| 3406 | |
| 3407 | schedule(); |
| 3408 | } |
| 3409 | |
| 3410 | set_current_state(TASK_RUNNING); |
| 3411 | remove_wait_queue(&info->open_wait, &wait); |
| 3412 | |
| 3413 | if (extra_count) |
| 3414 | info->count++; |
| 3415 | info->blocked_open--; |
| 3416 | |
| 3417 | if (debug_level >= DEBUG_LEVEL_INFO) |
| 3418 | printk("%s(%d):%s block_til_ready() after, count=%d\n", |
| 3419 | __FILE__,__LINE__, tty->driver->name, info->count ); |
| 3420 | |
| 3421 | if (!retval) |
| 3422 | info->flags |= ASYNC_NORMAL_ACTIVE; |
| 3423 | |
| 3424 | return retval; |
| 3425 | } |
| 3426 | |
| 3427 | int alloc_dma_bufs(SLMP_INFO *info) |
| 3428 | { |
| 3429 | unsigned short BuffersPerFrame; |
| 3430 | unsigned short BufferCount; |
| 3431 | |
| 3432 | // Force allocation to start at 64K boundary for each port. |
| 3433 | // This is necessary because *all* buffer descriptors for a port |
| 3434 | // *must* be in the same 64K block. All descriptors on a port |
| 3435 | // share a common 'base' address (upper 8 bits of 24 bits) programmed |
| 3436 | // into the CBP register. |
| 3437 | info->port_array[0]->last_mem_alloc = (SCA_MEM_SIZE/4) * info->port_num; |
| 3438 | |
| 3439 | /* Calculate the number of DMA buffers necessary to hold the */ |
| 3440 | /* largest allowable frame size. Note: If the max frame size is */ |
| 3441 | /* not an even multiple of the DMA buffer size then we need to */ |
| 3442 | /* round the buffer count per frame up one. */ |
| 3443 | |
| 3444 | BuffersPerFrame = (unsigned short)(info->max_frame_size/SCABUFSIZE); |
| 3445 | if ( info->max_frame_size % SCABUFSIZE ) |
| 3446 | BuffersPerFrame++; |
| 3447 | |
| 3448 | /* calculate total number of data buffers (SCABUFSIZE) possible |
| 3449 | * in one ports memory (SCA_MEM_SIZE/4) after allocating memory |
| 3450 | * for the descriptor list (BUFFERLISTSIZE). |
| 3451 | */ |
| 3452 | BufferCount = (SCA_MEM_SIZE/4 - BUFFERLISTSIZE)/SCABUFSIZE; |
| 3453 | |
| 3454 | /* limit number of buffers to maximum amount of descriptors */ |
| 3455 | if (BufferCount > BUFFERLISTSIZE/sizeof(SCADESC)) |
| 3456 | BufferCount = BUFFERLISTSIZE/sizeof(SCADESC); |
| 3457 | |
| 3458 | /* use enough buffers to transmit one max size frame */ |
| 3459 | info->tx_buf_count = BuffersPerFrame + 1; |
| 3460 | |
| 3461 | /* never use more than half the available buffers for transmit */ |
| 3462 | if (info->tx_buf_count > (BufferCount/2)) |
| 3463 | info->tx_buf_count = BufferCount/2; |
| 3464 | |
| 3465 | if (info->tx_buf_count > SCAMAXDESC) |
| 3466 | info->tx_buf_count = SCAMAXDESC; |
| 3467 | |
| 3468 | /* use remaining buffers for receive */ |
| 3469 | info->rx_buf_count = BufferCount - info->tx_buf_count; |
| 3470 | |
| 3471 | if (info->rx_buf_count > SCAMAXDESC) |
| 3472 | info->rx_buf_count = SCAMAXDESC; |
| 3473 | |
| 3474 | if ( debug_level >= DEBUG_LEVEL_INFO ) |
| 3475 | printk("%s(%d):%s Allocating %d TX and %d RX DMA buffers.\n", |
| 3476 | __FILE__,__LINE__, info->device_name, |
| 3477 | info->tx_buf_count,info->rx_buf_count); |
| 3478 | |
| 3479 | if ( alloc_buf_list( info ) < 0 || |
| 3480 | alloc_frame_bufs(info, |
| 3481 | info->rx_buf_list, |
| 3482 | info->rx_buf_list_ex, |
| 3483 | info->rx_buf_count) < 0 || |
| 3484 | alloc_frame_bufs(info, |
| 3485 | info->tx_buf_list, |
| 3486 | info->tx_buf_list_ex, |
| 3487 | info->tx_buf_count) < 0 || |
| 3488 | alloc_tmp_rx_buf(info) < 0 ) { |
| 3489 | printk("%s(%d):%s Can't allocate DMA buffer memory\n", |
| 3490 | __FILE__,__LINE__, info->device_name); |
| 3491 | return -ENOMEM; |
| 3492 | } |
| 3493 | |
| 3494 | rx_reset_buffers( info ); |
| 3495 | |
| 3496 | return 0; |
| 3497 | } |
| 3498 | |
| 3499 | /* Allocate DMA buffers for the transmit and receive descriptor lists. |
| 3500 | */ |
| 3501 | int alloc_buf_list(SLMP_INFO *info) |
| 3502 | { |
| 3503 | unsigned int i; |
| 3504 | |
| 3505 | /* build list in adapter shared memory */ |
| 3506 | info->buffer_list = info->memory_base + info->port_array[0]->last_mem_alloc; |
| 3507 | info->buffer_list_phys = info->port_array[0]->last_mem_alloc; |
| 3508 | info->port_array[0]->last_mem_alloc += BUFFERLISTSIZE; |
| 3509 | |
| 3510 | memset(info->buffer_list, 0, BUFFERLISTSIZE); |
| 3511 | |
| 3512 | /* Save virtual address pointers to the receive and */ |
| 3513 | /* transmit buffer lists. (Receive 1st). These pointers will */ |
| 3514 | /* be used by the processor to access the lists. */ |
| 3515 | info->rx_buf_list = (SCADESC *)info->buffer_list; |
| 3516 | |
| 3517 | info->tx_buf_list = (SCADESC *)info->buffer_list; |
| 3518 | info->tx_buf_list += info->rx_buf_count; |
| 3519 | |
| 3520 | /* Build links for circular buffer entry lists (tx and rx) |
| 3521 | * |
| 3522 | * Note: links are physical addresses read by the SCA device |
| 3523 | * to determine the next buffer entry to use. |
| 3524 | */ |
| 3525 | |
| 3526 | for ( i = 0; i < info->rx_buf_count; i++ ) { |
| 3527 | /* calculate and store physical address of this buffer entry */ |
| 3528 | info->rx_buf_list_ex[i].phys_entry = |
| 3529 | info->buffer_list_phys + (i * sizeof(SCABUFSIZE)); |
| 3530 | |
| 3531 | /* calculate and store physical address of */ |
| 3532 | /* next entry in cirular list of entries */ |
| 3533 | info->rx_buf_list[i].next = info->buffer_list_phys; |
| 3534 | if ( i < info->rx_buf_count - 1 ) |
| 3535 | info->rx_buf_list[i].next += (i + 1) * sizeof(SCADESC); |
| 3536 | |
| 3537 | info->rx_buf_list[i].length = SCABUFSIZE; |
| 3538 | } |
| 3539 | |
| 3540 | for ( i = 0; i < info->tx_buf_count; i++ ) { |
| 3541 | /* calculate and store physical address of this buffer entry */ |
| 3542 | info->tx_buf_list_ex[i].phys_entry = info->buffer_list_phys + |
| 3543 | ((info->rx_buf_count + i) * sizeof(SCADESC)); |
| 3544 | |
| 3545 | /* calculate and store physical address of */ |
| 3546 | /* next entry in cirular list of entries */ |
| 3547 | |
| 3548 | info->tx_buf_list[i].next = info->buffer_list_phys + |
| 3549 | info->rx_buf_count * sizeof(SCADESC); |
| 3550 | |
| 3551 | if ( i < info->tx_buf_count - 1 ) |
| 3552 | info->tx_buf_list[i].next += (i + 1) * sizeof(SCADESC); |
| 3553 | } |
| 3554 | |
| 3555 | return 0; |
| 3556 | } |
| 3557 | |
| 3558 | /* Allocate the frame DMA buffers used by the specified buffer list. |
| 3559 | */ |
| 3560 | int alloc_frame_bufs(SLMP_INFO *info, SCADESC *buf_list,SCADESC_EX *buf_list_ex,int count) |
| 3561 | { |
| 3562 | int i; |
| 3563 | unsigned long phys_addr; |
| 3564 | |
| 3565 | for ( i = 0; i < count; i++ ) { |
| 3566 | buf_list_ex[i].virt_addr = info->memory_base + info->port_array[0]->last_mem_alloc; |
| 3567 | phys_addr = info->port_array[0]->last_mem_alloc; |
| 3568 | info->port_array[0]->last_mem_alloc += SCABUFSIZE; |
| 3569 | |
| 3570 | buf_list[i].buf_ptr = (unsigned short)phys_addr; |
| 3571 | buf_list[i].buf_base = (unsigned char)(phys_addr >> 16); |
| 3572 | } |
| 3573 | |
| 3574 | return 0; |
| 3575 | } |
| 3576 | |
| 3577 | void free_dma_bufs(SLMP_INFO *info) |
| 3578 | { |
| 3579 | info->buffer_list = NULL; |
| 3580 | info->rx_buf_list = NULL; |
| 3581 | info->tx_buf_list = NULL; |
| 3582 | } |
| 3583 | |
| 3584 | /* allocate buffer large enough to hold max_frame_size. |
| 3585 | * This buffer is used to pass an assembled frame to the line discipline. |
| 3586 | */ |
| 3587 | int alloc_tmp_rx_buf(SLMP_INFO *info) |
| 3588 | { |
| 3589 | info->tmp_rx_buf = kmalloc(info->max_frame_size, GFP_KERNEL); |
| 3590 | if (info->tmp_rx_buf == NULL) |
| 3591 | return -ENOMEM; |
| 3592 | return 0; |
| 3593 | } |
| 3594 | |
| 3595 | void free_tmp_rx_buf(SLMP_INFO *info) |
| 3596 | { |
Jesper Juhl | 735d566 | 2005-11-07 01:01:29 -0800 | [diff] [blame] | 3597 | kfree(info->tmp_rx_buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3598 | info->tmp_rx_buf = NULL; |
| 3599 | } |
| 3600 | |
| 3601 | int claim_resources(SLMP_INFO *info) |
| 3602 | { |
| 3603 | if (request_mem_region(info->phys_memory_base,SCA_MEM_SIZE,"synclinkmp") == NULL) { |
| 3604 | printk( "%s(%d):%s mem addr conflict, Addr=%08X\n", |
| 3605 | __FILE__,__LINE__,info->device_name, info->phys_memory_base); |
| 3606 | info->init_error = DiagStatus_AddressConflict; |
| 3607 | goto errout; |
| 3608 | } |
| 3609 | else |
| 3610 | info->shared_mem_requested = 1; |
| 3611 | |
| 3612 | if (request_mem_region(info->phys_lcr_base + info->lcr_offset,128,"synclinkmp") == NULL) { |
| 3613 | printk( "%s(%d):%s lcr mem addr conflict, Addr=%08X\n", |
| 3614 | __FILE__,__LINE__,info->device_name, info->phys_lcr_base); |
| 3615 | info->init_error = DiagStatus_AddressConflict; |
| 3616 | goto errout; |
| 3617 | } |
| 3618 | else |
| 3619 | info->lcr_mem_requested = 1; |
| 3620 | |
| 3621 | if (request_mem_region(info->phys_sca_base + info->sca_offset,SCA_BASE_SIZE,"synclinkmp") == NULL) { |
| 3622 | printk( "%s(%d):%s sca mem addr conflict, Addr=%08X\n", |
| 3623 | __FILE__,__LINE__,info->device_name, info->phys_sca_base); |
| 3624 | info->init_error = DiagStatus_AddressConflict; |
| 3625 | goto errout; |
| 3626 | } |
| 3627 | else |
| 3628 | info->sca_base_requested = 1; |
| 3629 | |
| 3630 | if (request_mem_region(info->phys_statctrl_base + info->statctrl_offset,SCA_REG_SIZE,"synclinkmp") == NULL) { |
| 3631 | printk( "%s(%d):%s stat/ctrl mem addr conflict, Addr=%08X\n", |
| 3632 | __FILE__,__LINE__,info->device_name, info->phys_statctrl_base); |
| 3633 | info->init_error = DiagStatus_AddressConflict; |
| 3634 | goto errout; |
| 3635 | } |
| 3636 | else |
| 3637 | info->sca_statctrl_requested = 1; |
| 3638 | |
| 3639 | info->memory_base = ioremap(info->phys_memory_base,SCA_MEM_SIZE); |
| 3640 | if (!info->memory_base) { |
| 3641 | printk( "%s(%d):%s Cant map shared memory, MemAddr=%08X\n", |
| 3642 | __FILE__,__LINE__,info->device_name, info->phys_memory_base ); |
| 3643 | info->init_error = DiagStatus_CantAssignPciResources; |
| 3644 | goto errout; |
| 3645 | } |
| 3646 | |
| 3647 | info->lcr_base = ioremap(info->phys_lcr_base,PAGE_SIZE); |
| 3648 | if (!info->lcr_base) { |
| 3649 | printk( "%s(%d):%s Cant map LCR memory, MemAddr=%08X\n", |
| 3650 | __FILE__,__LINE__,info->device_name, info->phys_lcr_base ); |
| 3651 | info->init_error = DiagStatus_CantAssignPciResources; |
| 3652 | goto errout; |
| 3653 | } |
| 3654 | info->lcr_base += info->lcr_offset; |
| 3655 | |
| 3656 | info->sca_base = ioremap(info->phys_sca_base,PAGE_SIZE); |
| 3657 | if (!info->sca_base) { |
| 3658 | printk( "%s(%d):%s Cant map SCA memory, MemAddr=%08X\n", |
| 3659 | __FILE__,__LINE__,info->device_name, info->phys_sca_base ); |
| 3660 | info->init_error = DiagStatus_CantAssignPciResources; |
| 3661 | goto errout; |
| 3662 | } |
| 3663 | info->sca_base += info->sca_offset; |
| 3664 | |
| 3665 | info->statctrl_base = ioremap(info->phys_statctrl_base,PAGE_SIZE); |
| 3666 | if (!info->statctrl_base) { |
| 3667 | printk( "%s(%d):%s Cant map SCA Status/Control memory, MemAddr=%08X\n", |
| 3668 | __FILE__,__LINE__,info->device_name, info->phys_statctrl_base ); |
| 3669 | info->init_error = DiagStatus_CantAssignPciResources; |
| 3670 | goto errout; |
| 3671 | } |
| 3672 | info->statctrl_base += info->statctrl_offset; |
| 3673 | |
| 3674 | if ( !memory_test(info) ) { |
| 3675 | printk( "%s(%d):Shared Memory Test failed for device %s MemAddr=%08X\n", |
| 3676 | __FILE__,__LINE__,info->device_name, info->phys_memory_base ); |
| 3677 | info->init_error = DiagStatus_MemoryError; |
| 3678 | goto errout; |
| 3679 | } |
| 3680 | |
| 3681 | return 0; |
| 3682 | |
| 3683 | errout: |
| 3684 | release_resources( info ); |
| 3685 | return -ENODEV; |
| 3686 | } |
| 3687 | |
| 3688 | void release_resources(SLMP_INFO *info) |
| 3689 | { |
| 3690 | if ( debug_level >= DEBUG_LEVEL_INFO ) |
| 3691 | printk( "%s(%d):%s release_resources() entry\n", |
| 3692 | __FILE__,__LINE__,info->device_name ); |
| 3693 | |
| 3694 | if ( info->irq_requested ) { |
| 3695 | free_irq(info->irq_level, info); |
| 3696 | info->irq_requested = 0; |
| 3697 | } |
| 3698 | |
| 3699 | if ( info->shared_mem_requested ) { |
| 3700 | release_mem_region(info->phys_memory_base,SCA_MEM_SIZE); |
| 3701 | info->shared_mem_requested = 0; |
| 3702 | } |
| 3703 | if ( info->lcr_mem_requested ) { |
| 3704 | release_mem_region(info->phys_lcr_base + info->lcr_offset,128); |
| 3705 | info->lcr_mem_requested = 0; |
| 3706 | } |
| 3707 | if ( info->sca_base_requested ) { |
| 3708 | release_mem_region(info->phys_sca_base + info->sca_offset,SCA_BASE_SIZE); |
| 3709 | info->sca_base_requested = 0; |
| 3710 | } |
| 3711 | if ( info->sca_statctrl_requested ) { |
| 3712 | release_mem_region(info->phys_statctrl_base + info->statctrl_offset,SCA_REG_SIZE); |
| 3713 | info->sca_statctrl_requested = 0; |
| 3714 | } |
| 3715 | |
| 3716 | if (info->memory_base){ |
| 3717 | iounmap(info->memory_base); |
| 3718 | info->memory_base = NULL; |
| 3719 | } |
| 3720 | |
| 3721 | if (info->sca_base) { |
| 3722 | iounmap(info->sca_base - info->sca_offset); |
| 3723 | info->sca_base=NULL; |
| 3724 | } |
| 3725 | |
| 3726 | if (info->statctrl_base) { |
| 3727 | iounmap(info->statctrl_base - info->statctrl_offset); |
| 3728 | info->statctrl_base=NULL; |
| 3729 | } |
| 3730 | |
| 3731 | if (info->lcr_base){ |
| 3732 | iounmap(info->lcr_base - info->lcr_offset); |
| 3733 | info->lcr_base = NULL; |
| 3734 | } |
| 3735 | |
| 3736 | if ( debug_level >= DEBUG_LEVEL_INFO ) |
| 3737 | printk( "%s(%d):%s release_resources() exit\n", |
| 3738 | __FILE__,__LINE__,info->device_name ); |
| 3739 | } |
| 3740 | |
| 3741 | /* Add the specified device instance data structure to the |
| 3742 | * global linked list of devices and increment the device count. |
| 3743 | */ |
| 3744 | void add_device(SLMP_INFO *info) |
| 3745 | { |
| 3746 | info->next_device = NULL; |
| 3747 | info->line = synclinkmp_device_count; |
| 3748 | sprintf(info->device_name,"ttySLM%dp%d",info->adapter_num,info->port_num); |
| 3749 | |
| 3750 | if (info->line < MAX_DEVICES) { |
| 3751 | if (maxframe[info->line]) |
| 3752 | info->max_frame_size = maxframe[info->line]; |
| 3753 | info->dosyncppp = dosyncppp[info->line]; |
| 3754 | } |
| 3755 | |
| 3756 | synclinkmp_device_count++; |
| 3757 | |
| 3758 | if ( !synclinkmp_device_list ) |
| 3759 | synclinkmp_device_list = info; |
| 3760 | else { |
| 3761 | SLMP_INFO *current_dev = synclinkmp_device_list; |
| 3762 | while( current_dev->next_device ) |
| 3763 | current_dev = current_dev->next_device; |
| 3764 | current_dev->next_device = info; |
| 3765 | } |
| 3766 | |
| 3767 | if ( info->max_frame_size < 4096 ) |
| 3768 | info->max_frame_size = 4096; |
| 3769 | else if ( info->max_frame_size > 65535 ) |
| 3770 | info->max_frame_size = 65535; |
| 3771 | |
| 3772 | printk( "SyncLink MultiPort %s: " |
| 3773 | "Mem=(%08x %08X %08x %08X) IRQ=%d MaxFrameSize=%u\n", |
| 3774 | info->device_name, |
| 3775 | info->phys_sca_base, |
| 3776 | info->phys_memory_base, |
| 3777 | info->phys_statctrl_base, |
| 3778 | info->phys_lcr_base, |
| 3779 | info->irq_level, |
| 3780 | info->max_frame_size ); |
| 3781 | |
| 3782 | #ifdef CONFIG_HDLC |
| 3783 | hdlcdev_init(info); |
| 3784 | #endif |
| 3785 | } |
| 3786 | |
| 3787 | /* Allocate and initialize a device instance structure |
| 3788 | * |
| 3789 | * Return Value: pointer to SLMP_INFO if success, otherwise NULL |
| 3790 | */ |
| 3791 | static SLMP_INFO *alloc_dev(int adapter_num, int port_num, struct pci_dev *pdev) |
| 3792 | { |
| 3793 | SLMP_INFO *info; |
| 3794 | |
| 3795 | info = (SLMP_INFO *)kmalloc(sizeof(SLMP_INFO), |
| 3796 | GFP_KERNEL); |
| 3797 | |
| 3798 | if (!info) { |
| 3799 | printk("%s(%d) Error can't allocate device instance data for adapter %d, port %d\n", |
| 3800 | __FILE__,__LINE__, adapter_num, port_num); |
| 3801 | } else { |
| 3802 | memset(info, 0, sizeof(SLMP_INFO)); |
| 3803 | info->magic = MGSL_MAGIC; |
| 3804 | INIT_WORK(&info->task, bh_handler, info); |
| 3805 | info->max_frame_size = 4096; |
| 3806 | info->close_delay = 5*HZ/10; |
| 3807 | info->closing_wait = 30*HZ; |
| 3808 | init_waitqueue_head(&info->open_wait); |
| 3809 | init_waitqueue_head(&info->close_wait); |
| 3810 | init_waitqueue_head(&info->status_event_wait_q); |
| 3811 | init_waitqueue_head(&info->event_wait_q); |
| 3812 | spin_lock_init(&info->netlock); |
| 3813 | memcpy(&info->params,&default_params,sizeof(MGSL_PARAMS)); |
| 3814 | info->idle_mode = HDLC_TXIDLE_FLAGS; |
| 3815 | info->adapter_num = adapter_num; |
| 3816 | info->port_num = port_num; |
| 3817 | |
| 3818 | /* Copy configuration info to device instance data */ |
| 3819 | info->irq_level = pdev->irq; |
| 3820 | info->phys_lcr_base = pci_resource_start(pdev,0); |
| 3821 | info->phys_sca_base = pci_resource_start(pdev,2); |
| 3822 | info->phys_memory_base = pci_resource_start(pdev,3); |
| 3823 | info->phys_statctrl_base = pci_resource_start(pdev,4); |
| 3824 | |
| 3825 | /* Because veremap only works on page boundaries we must map |
| 3826 | * a larger area than is actually implemented for the LCR |
| 3827 | * memory range. We map a full page starting at the page boundary. |
| 3828 | */ |
| 3829 | info->lcr_offset = info->phys_lcr_base & (PAGE_SIZE-1); |
| 3830 | info->phys_lcr_base &= ~(PAGE_SIZE-1); |
| 3831 | |
| 3832 | info->sca_offset = info->phys_sca_base & (PAGE_SIZE-1); |
| 3833 | info->phys_sca_base &= ~(PAGE_SIZE-1); |
| 3834 | |
| 3835 | info->statctrl_offset = info->phys_statctrl_base & (PAGE_SIZE-1); |
| 3836 | info->phys_statctrl_base &= ~(PAGE_SIZE-1); |
| 3837 | |
| 3838 | info->bus_type = MGSL_BUS_TYPE_PCI; |
| 3839 | info->irq_flags = SA_SHIRQ; |
| 3840 | |
| 3841 | init_timer(&info->tx_timer); |
| 3842 | info->tx_timer.data = (unsigned long)info; |
| 3843 | info->tx_timer.function = tx_timeout; |
| 3844 | |
| 3845 | init_timer(&info->status_timer); |
| 3846 | info->status_timer.data = (unsigned long)info; |
| 3847 | info->status_timer.function = status_timeout; |
| 3848 | |
| 3849 | /* Store the PCI9050 misc control register value because a flaw |
| 3850 | * in the PCI9050 prevents LCR registers from being read if |
| 3851 | * BIOS assigns an LCR base address with bit 7 set. |
| 3852 | * |
| 3853 | * Only the misc control register is accessed for which only |
| 3854 | * write access is needed, so set an initial value and change |
| 3855 | * bits to the device instance data as we write the value |
| 3856 | * to the actual misc control register. |
| 3857 | */ |
| 3858 | info->misc_ctrl_value = 0x087e4546; |
| 3859 | |
| 3860 | /* initial port state is unknown - if startup errors |
| 3861 | * occur, init_error will be set to indicate the |
| 3862 | * problem. Once the port is fully initialized, |
| 3863 | * this value will be set to 0 to indicate the |
| 3864 | * port is available. |
| 3865 | */ |
| 3866 | info->init_error = -1; |
| 3867 | } |
| 3868 | |
| 3869 | return info; |
| 3870 | } |
| 3871 | |
| 3872 | void device_init(int adapter_num, struct pci_dev *pdev) |
| 3873 | { |
| 3874 | SLMP_INFO *port_array[SCA_MAX_PORTS]; |
| 3875 | int port; |
| 3876 | |
| 3877 | /* allocate device instances for up to SCA_MAX_PORTS devices */ |
| 3878 | for ( port = 0; port < SCA_MAX_PORTS; ++port ) { |
| 3879 | port_array[port] = alloc_dev(adapter_num,port,pdev); |
| 3880 | if( port_array[port] == NULL ) { |
| 3881 | for ( --port; port >= 0; --port ) |
| 3882 | kfree(port_array[port]); |
| 3883 | return; |
| 3884 | } |
| 3885 | } |
| 3886 | |
| 3887 | /* give copy of port_array to all ports and add to device list */ |
| 3888 | for ( port = 0; port < SCA_MAX_PORTS; ++port ) { |
| 3889 | memcpy(port_array[port]->port_array,port_array,sizeof(port_array)); |
| 3890 | add_device( port_array[port] ); |
| 3891 | spin_lock_init(&port_array[port]->lock); |
| 3892 | } |
| 3893 | |
| 3894 | /* Allocate and claim adapter resources */ |
| 3895 | if ( !claim_resources(port_array[0]) ) { |
| 3896 | |
| 3897 | alloc_dma_bufs(port_array[0]); |
| 3898 | |
| 3899 | /* copy resource information from first port to others */ |
| 3900 | for ( port = 1; port < SCA_MAX_PORTS; ++port ) { |
| 3901 | port_array[port]->lock = port_array[0]->lock; |
| 3902 | port_array[port]->irq_level = port_array[0]->irq_level; |
| 3903 | port_array[port]->memory_base = port_array[0]->memory_base; |
| 3904 | port_array[port]->sca_base = port_array[0]->sca_base; |
| 3905 | port_array[port]->statctrl_base = port_array[0]->statctrl_base; |
| 3906 | port_array[port]->lcr_base = port_array[0]->lcr_base; |
| 3907 | alloc_dma_bufs(port_array[port]); |
| 3908 | } |
| 3909 | |
| 3910 | if ( request_irq(port_array[0]->irq_level, |
| 3911 | synclinkmp_interrupt, |
| 3912 | port_array[0]->irq_flags, |
| 3913 | port_array[0]->device_name, |
| 3914 | port_array[0]) < 0 ) { |
| 3915 | printk( "%s(%d):%s Cant request interrupt, IRQ=%d\n", |
| 3916 | __FILE__,__LINE__, |
| 3917 | port_array[0]->device_name, |
| 3918 | port_array[0]->irq_level ); |
| 3919 | } |
| 3920 | else { |
| 3921 | port_array[0]->irq_requested = 1; |
| 3922 | adapter_test(port_array[0]); |
| 3923 | } |
| 3924 | } |
| 3925 | } |
| 3926 | |
| 3927 | static struct tty_operations ops = { |
| 3928 | .open = open, |
| 3929 | .close = close, |
| 3930 | .write = write, |
| 3931 | .put_char = put_char, |
| 3932 | .flush_chars = flush_chars, |
| 3933 | .write_room = write_room, |
| 3934 | .chars_in_buffer = chars_in_buffer, |
| 3935 | .flush_buffer = flush_buffer, |
| 3936 | .ioctl = ioctl, |
| 3937 | .throttle = throttle, |
| 3938 | .unthrottle = unthrottle, |
| 3939 | .send_xchar = send_xchar, |
| 3940 | .break_ctl = set_break, |
| 3941 | .wait_until_sent = wait_until_sent, |
| 3942 | .read_proc = read_proc, |
| 3943 | .set_termios = set_termios, |
| 3944 | .stop = tx_hold, |
| 3945 | .start = tx_release, |
| 3946 | .hangup = hangup, |
| 3947 | .tiocmget = tiocmget, |
| 3948 | .tiocmset = tiocmset, |
| 3949 | }; |
| 3950 | |
| 3951 | static void synclinkmp_cleanup(void) |
| 3952 | { |
| 3953 | int rc; |
| 3954 | SLMP_INFO *info; |
| 3955 | SLMP_INFO *tmp; |
| 3956 | |
| 3957 | printk("Unloading %s %s\n", driver_name, driver_version); |
| 3958 | |
| 3959 | if (serial_driver) { |
| 3960 | if ((rc = tty_unregister_driver(serial_driver))) |
| 3961 | printk("%s(%d) failed to unregister tty driver err=%d\n", |
| 3962 | __FILE__,__LINE__,rc); |
| 3963 | put_tty_driver(serial_driver); |
| 3964 | } |
| 3965 | |
| 3966 | /* reset devices */ |
| 3967 | info = synclinkmp_device_list; |
| 3968 | while(info) { |
| 3969 | reset_port(info); |
| 3970 | info = info->next_device; |
| 3971 | } |
| 3972 | |
| 3973 | /* release devices */ |
| 3974 | info = synclinkmp_device_list; |
| 3975 | while(info) { |
| 3976 | #ifdef CONFIG_HDLC |
| 3977 | hdlcdev_exit(info); |
| 3978 | #endif |
| 3979 | free_dma_bufs(info); |
| 3980 | free_tmp_rx_buf(info); |
| 3981 | if ( info->port_num == 0 ) { |
| 3982 | if (info->sca_base) |
| 3983 | write_reg(info, LPR, 1); /* set low power mode */ |
| 3984 | release_resources(info); |
| 3985 | } |
| 3986 | tmp = info; |
| 3987 | info = info->next_device; |
| 3988 | kfree(tmp); |
| 3989 | } |
| 3990 | |
| 3991 | pci_unregister_driver(&synclinkmp_pci_driver); |
| 3992 | } |
| 3993 | |
| 3994 | /* Driver initialization entry point. |
| 3995 | */ |
| 3996 | |
| 3997 | static int __init synclinkmp_init(void) |
| 3998 | { |
| 3999 | int rc; |
| 4000 | |
| 4001 | if (break_on_load) { |
| 4002 | synclinkmp_get_text_ptr(); |
| 4003 | BREAKPOINT(); |
| 4004 | } |
| 4005 | |
| 4006 | printk("%s %s\n", driver_name, driver_version); |
| 4007 | |
| 4008 | if ((rc = pci_register_driver(&synclinkmp_pci_driver)) < 0) { |
| 4009 | printk("%s:failed to register PCI driver, error=%d\n",__FILE__,rc); |
| 4010 | return rc; |
| 4011 | } |
| 4012 | |
| 4013 | serial_driver = alloc_tty_driver(128); |
| 4014 | if (!serial_driver) { |
| 4015 | rc = -ENOMEM; |
| 4016 | goto error; |
| 4017 | } |
| 4018 | |
| 4019 | /* Initialize the tty_driver structure */ |
| 4020 | |
| 4021 | serial_driver->owner = THIS_MODULE; |
| 4022 | serial_driver->driver_name = "synclinkmp"; |
| 4023 | serial_driver->name = "ttySLM"; |
| 4024 | serial_driver->major = ttymajor; |
| 4025 | serial_driver->minor_start = 64; |
| 4026 | serial_driver->type = TTY_DRIVER_TYPE_SERIAL; |
| 4027 | serial_driver->subtype = SERIAL_TYPE_NORMAL; |
| 4028 | serial_driver->init_termios = tty_std_termios; |
| 4029 | serial_driver->init_termios.c_cflag = |
| 4030 | B9600 | CS8 | CREAD | HUPCL | CLOCAL; |
| 4031 | serial_driver->flags = TTY_DRIVER_REAL_RAW; |
| 4032 | tty_set_operations(serial_driver, &ops); |
| 4033 | if ((rc = tty_register_driver(serial_driver)) < 0) { |
| 4034 | printk("%s(%d):Couldn't register serial driver\n", |
| 4035 | __FILE__,__LINE__); |
| 4036 | put_tty_driver(serial_driver); |
| 4037 | serial_driver = NULL; |
| 4038 | goto error; |
| 4039 | } |
| 4040 | |
| 4041 | printk("%s %s, tty major#%d\n", |
| 4042 | driver_name, driver_version, |
| 4043 | serial_driver->major); |
| 4044 | |
| 4045 | return 0; |
| 4046 | |
| 4047 | error: |
| 4048 | synclinkmp_cleanup(); |
| 4049 | return rc; |
| 4050 | } |
| 4051 | |
| 4052 | static void __exit synclinkmp_exit(void) |
| 4053 | { |
| 4054 | synclinkmp_cleanup(); |
| 4055 | } |
| 4056 | |
| 4057 | module_init(synclinkmp_init); |
| 4058 | module_exit(synclinkmp_exit); |
| 4059 | |
| 4060 | /* Set the port for internal loopback mode. |
| 4061 | * The TxCLK and RxCLK signals are generated from the BRG and |
| 4062 | * the TxD is looped back to the RxD internally. |
| 4063 | */ |
| 4064 | void enable_loopback(SLMP_INFO *info, int enable) |
| 4065 | { |
| 4066 | if (enable) { |
| 4067 | /* MD2 (Mode Register 2) |
| 4068 | * 01..00 CNCT<1..0> Channel Connection 11=Local Loopback |
| 4069 | */ |
| 4070 | write_reg(info, MD2, (unsigned char)(read_reg(info, MD2) | (BIT1 + BIT0))); |
| 4071 | |
| 4072 | /* degate external TxC clock source */ |
| 4073 | info->port_array[0]->ctrlreg_value |= (BIT0 << (info->port_num * 2)); |
| 4074 | write_control_reg(info); |
| 4075 | |
| 4076 | /* RXS/TXS (Rx/Tx clock source) |
| 4077 | * 07 Reserved, must be 0 |
| 4078 | * 06..04 Clock Source, 100=BRG |
| 4079 | * 03..00 Clock Divisor, 0000=1 |
| 4080 | */ |
| 4081 | write_reg(info, RXS, 0x40); |
| 4082 | write_reg(info, TXS, 0x40); |
| 4083 | |
| 4084 | } else { |
| 4085 | /* MD2 (Mode Register 2) |
| 4086 | * 01..00 CNCT<1..0> Channel connection, 0=normal |
| 4087 | */ |
| 4088 | write_reg(info, MD2, (unsigned char)(read_reg(info, MD2) & ~(BIT1 + BIT0))); |
| 4089 | |
| 4090 | /* RXS/TXS (Rx/Tx clock source) |
| 4091 | * 07 Reserved, must be 0 |
| 4092 | * 06..04 Clock Source, 000=RxC/TxC Pin |
| 4093 | * 03..00 Clock Divisor, 0000=1 |
| 4094 | */ |
| 4095 | write_reg(info, RXS, 0x00); |
| 4096 | write_reg(info, TXS, 0x00); |
| 4097 | } |
| 4098 | |
| 4099 | /* set LinkSpeed if available, otherwise default to 2Mbps */ |
| 4100 | if (info->params.clock_speed) |
| 4101 | set_rate(info, info->params.clock_speed); |
| 4102 | else |
| 4103 | set_rate(info, 3686400); |
| 4104 | } |
| 4105 | |
| 4106 | /* Set the baud rate register to the desired speed |
| 4107 | * |
| 4108 | * data_rate data rate of clock in bits per second |
| 4109 | * A data rate of 0 disables the AUX clock. |
| 4110 | */ |
| 4111 | void set_rate( SLMP_INFO *info, u32 data_rate ) |
| 4112 | { |
| 4113 | u32 TMCValue; |
| 4114 | unsigned char BRValue; |
| 4115 | u32 Divisor=0; |
| 4116 | |
| 4117 | /* fBRG = fCLK/(TMC * 2^BR) |
| 4118 | */ |
| 4119 | if (data_rate != 0) { |
| 4120 | Divisor = 14745600/data_rate; |
| 4121 | if (!Divisor) |
| 4122 | Divisor = 1; |
| 4123 | |
| 4124 | TMCValue = Divisor; |
| 4125 | |
| 4126 | BRValue = 0; |
| 4127 | if (TMCValue != 1 && TMCValue != 2) { |
| 4128 | /* BRValue of 0 provides 50/50 duty cycle *only* when |
| 4129 | * TMCValue is 1 or 2. BRValue of 1 to 9 always provides |
| 4130 | * 50/50 duty cycle. |
| 4131 | */ |
| 4132 | BRValue = 1; |
| 4133 | TMCValue >>= 1; |
| 4134 | } |
| 4135 | |
| 4136 | /* while TMCValue is too big for TMC register, divide |
| 4137 | * by 2 and increment BR exponent. |
| 4138 | */ |
| 4139 | for(; TMCValue > 256 && BRValue < 10; BRValue++) |
| 4140 | TMCValue >>= 1; |
| 4141 | |
| 4142 | write_reg(info, TXS, |
| 4143 | (unsigned char)((read_reg(info, TXS) & 0xf0) | BRValue)); |
| 4144 | write_reg(info, RXS, |
| 4145 | (unsigned char)((read_reg(info, RXS) & 0xf0) | BRValue)); |
| 4146 | write_reg(info, TMC, (unsigned char)TMCValue); |
| 4147 | } |
| 4148 | else { |
| 4149 | write_reg(info, TXS,0); |
| 4150 | write_reg(info, RXS,0); |
| 4151 | write_reg(info, TMC, 0); |
| 4152 | } |
| 4153 | } |
| 4154 | |
| 4155 | /* Disable receiver |
| 4156 | */ |
| 4157 | void rx_stop(SLMP_INFO *info) |
| 4158 | { |
| 4159 | if (debug_level >= DEBUG_LEVEL_ISR) |
| 4160 | printk("%s(%d):%s rx_stop()\n", |
| 4161 | __FILE__,__LINE__, info->device_name ); |
| 4162 | |
| 4163 | write_reg(info, CMD, RXRESET); |
| 4164 | |
| 4165 | info->ie0_value &= ~RXRDYE; |
| 4166 | write_reg(info, IE0, info->ie0_value); /* disable Rx data interrupts */ |
| 4167 | |
| 4168 | write_reg(info, RXDMA + DSR, 0); /* disable Rx DMA */ |
| 4169 | write_reg(info, RXDMA + DCMD, SWABORT); /* reset/init Rx DMA */ |
| 4170 | write_reg(info, RXDMA + DIR, 0); /* disable Rx DMA interrupts */ |
| 4171 | |
| 4172 | info->rx_enabled = 0; |
| 4173 | info->rx_overflow = 0; |
| 4174 | } |
| 4175 | |
| 4176 | /* enable the receiver |
| 4177 | */ |
| 4178 | void rx_start(SLMP_INFO *info) |
| 4179 | { |
| 4180 | int i; |
| 4181 | |
| 4182 | if (debug_level >= DEBUG_LEVEL_ISR) |
| 4183 | printk("%s(%d):%s rx_start()\n", |
| 4184 | __FILE__,__LINE__, info->device_name ); |
| 4185 | |
| 4186 | write_reg(info, CMD, RXRESET); |
| 4187 | |
| 4188 | if ( info->params.mode == MGSL_MODE_HDLC ) { |
| 4189 | /* HDLC, disabe IRQ on rxdata */ |
| 4190 | info->ie0_value &= ~RXRDYE; |
| 4191 | write_reg(info, IE0, info->ie0_value); |
| 4192 | |
| 4193 | /* Reset all Rx DMA buffers and program rx dma */ |
| 4194 | write_reg(info, RXDMA + DSR, 0); /* disable Rx DMA */ |
| 4195 | write_reg(info, RXDMA + DCMD, SWABORT); /* reset/init Rx DMA */ |
| 4196 | |
| 4197 | for (i = 0; i < info->rx_buf_count; i++) { |
| 4198 | info->rx_buf_list[i].status = 0xff; |
| 4199 | |
| 4200 | // throttle to 4 shared memory writes at a time to prevent |
| 4201 | // hogging local bus (keep latency time for DMA requests low). |
| 4202 | if (!(i % 4)) |
| 4203 | read_status_reg(info); |
| 4204 | } |
| 4205 | info->current_rx_buf = 0; |
| 4206 | |
| 4207 | /* set current/1st descriptor address */ |
| 4208 | write_reg16(info, RXDMA + CDA, |
| 4209 | info->rx_buf_list_ex[0].phys_entry); |
| 4210 | |
| 4211 | /* set new last rx descriptor address */ |
| 4212 | write_reg16(info, RXDMA + EDA, |
| 4213 | info->rx_buf_list_ex[info->rx_buf_count - 1].phys_entry); |
| 4214 | |
| 4215 | /* set buffer length (shared by all rx dma data buffers) */ |
| 4216 | write_reg16(info, RXDMA + BFL, SCABUFSIZE); |
| 4217 | |
| 4218 | write_reg(info, RXDMA + DIR, 0x60); /* enable Rx DMA interrupts (EOM/BOF) */ |
| 4219 | write_reg(info, RXDMA + DSR, 0xf2); /* clear Rx DMA IRQs, enable Rx DMA */ |
| 4220 | } else { |
| 4221 | /* async, enable IRQ on rxdata */ |
| 4222 | info->ie0_value |= RXRDYE; |
| 4223 | write_reg(info, IE0, info->ie0_value); |
| 4224 | } |
| 4225 | |
| 4226 | write_reg(info, CMD, RXENABLE); |
| 4227 | |
| 4228 | info->rx_overflow = FALSE; |
| 4229 | info->rx_enabled = 1; |
| 4230 | } |
| 4231 | |
| 4232 | /* Enable the transmitter and send a transmit frame if |
| 4233 | * one is loaded in the DMA buffers. |
| 4234 | */ |
| 4235 | void tx_start(SLMP_INFO *info) |
| 4236 | { |
| 4237 | if (debug_level >= DEBUG_LEVEL_ISR) |
| 4238 | printk("%s(%d):%s tx_start() tx_count=%d\n", |
| 4239 | __FILE__,__LINE__, info->device_name,info->tx_count ); |
| 4240 | |
| 4241 | if (!info->tx_enabled ) { |
| 4242 | write_reg(info, CMD, TXRESET); |
| 4243 | write_reg(info, CMD, TXENABLE); |
| 4244 | info->tx_enabled = TRUE; |
| 4245 | } |
| 4246 | |
| 4247 | if ( info->tx_count ) { |
| 4248 | |
| 4249 | /* If auto RTS enabled and RTS is inactive, then assert */ |
| 4250 | /* RTS and set a flag indicating that the driver should */ |
| 4251 | /* negate RTS when the transmission completes. */ |
| 4252 | |
| 4253 | info->drop_rts_on_tx_done = 0; |
| 4254 | |
| 4255 | if (info->params.mode != MGSL_MODE_ASYNC) { |
| 4256 | |
| 4257 | if ( info->params.flags & HDLC_FLAG_AUTO_RTS ) { |
| 4258 | get_signals( info ); |
| 4259 | if ( !(info->serial_signals & SerialSignal_RTS) ) { |
| 4260 | info->serial_signals |= SerialSignal_RTS; |
| 4261 | set_signals( info ); |
| 4262 | info->drop_rts_on_tx_done = 1; |
| 4263 | } |
| 4264 | } |
| 4265 | |
| 4266 | write_reg16(info, TRC0, |
| 4267 | (unsigned short)(((tx_negate_fifo_level-1)<<8) + tx_active_fifo_level)); |
| 4268 | |
| 4269 | write_reg(info, TXDMA + DSR, 0); /* disable DMA channel */ |
| 4270 | write_reg(info, TXDMA + DCMD, SWABORT); /* reset/init DMA channel */ |
| 4271 | |
| 4272 | /* set TX CDA (current descriptor address) */ |
| 4273 | write_reg16(info, TXDMA + CDA, |
| 4274 | info->tx_buf_list_ex[0].phys_entry); |
| 4275 | |
| 4276 | /* set TX EDA (last descriptor address) */ |
| 4277 | write_reg16(info, TXDMA + EDA, |
| 4278 | info->tx_buf_list_ex[info->last_tx_buf].phys_entry); |
| 4279 | |
| 4280 | /* enable underrun IRQ */ |
| 4281 | info->ie1_value &= ~IDLE; |
| 4282 | info->ie1_value |= UDRN; |
| 4283 | write_reg(info, IE1, info->ie1_value); |
| 4284 | write_reg(info, SR1, (unsigned char)(IDLE + UDRN)); |
| 4285 | |
| 4286 | write_reg(info, TXDMA + DIR, 0x40); /* enable Tx DMA interrupts (EOM) */ |
| 4287 | write_reg(info, TXDMA + DSR, 0xf2); /* clear Tx DMA IRQs, enable Tx DMA */ |
| 4288 | |
| 4289 | info->tx_timer.expires = jiffies + msecs_to_jiffies(5000); |
| 4290 | add_timer(&info->tx_timer); |
| 4291 | } |
| 4292 | else { |
| 4293 | tx_load_fifo(info); |
| 4294 | /* async, enable IRQ on txdata */ |
| 4295 | info->ie0_value |= TXRDYE; |
| 4296 | write_reg(info, IE0, info->ie0_value); |
| 4297 | } |
| 4298 | |
| 4299 | info->tx_active = 1; |
| 4300 | } |
| 4301 | } |
| 4302 | |
| 4303 | /* stop the transmitter and DMA |
| 4304 | */ |
| 4305 | void tx_stop( SLMP_INFO *info ) |
| 4306 | { |
| 4307 | if (debug_level >= DEBUG_LEVEL_ISR) |
| 4308 | printk("%s(%d):%s tx_stop()\n", |
| 4309 | __FILE__,__LINE__, info->device_name ); |
| 4310 | |
| 4311 | del_timer(&info->tx_timer); |
| 4312 | |
| 4313 | write_reg(info, TXDMA + DSR, 0); /* disable DMA channel */ |
| 4314 | write_reg(info, TXDMA + DCMD, SWABORT); /* reset/init DMA channel */ |
| 4315 | |
| 4316 | write_reg(info, CMD, TXRESET); |
| 4317 | |
| 4318 | info->ie1_value &= ~(UDRN + IDLE); |
| 4319 | write_reg(info, IE1, info->ie1_value); /* disable tx status interrupts */ |
| 4320 | write_reg(info, SR1, (unsigned char)(IDLE + UDRN)); /* clear pending */ |
| 4321 | |
| 4322 | info->ie0_value &= ~TXRDYE; |
| 4323 | write_reg(info, IE0, info->ie0_value); /* disable tx data interrupts */ |
| 4324 | |
| 4325 | info->tx_enabled = 0; |
| 4326 | info->tx_active = 0; |
| 4327 | } |
| 4328 | |
| 4329 | /* Fill the transmit FIFO until the FIFO is full or |
| 4330 | * there is no more data to load. |
| 4331 | */ |
| 4332 | void tx_load_fifo(SLMP_INFO *info) |
| 4333 | { |
| 4334 | u8 TwoBytes[2]; |
| 4335 | |
| 4336 | /* do nothing is now tx data available and no XON/XOFF pending */ |
| 4337 | |
| 4338 | if ( !info->tx_count && !info->x_char ) |
| 4339 | return; |
| 4340 | |
| 4341 | /* load the Transmit FIFO until FIFOs full or all data sent */ |
| 4342 | |
| 4343 | while( info->tx_count && (read_reg(info,SR0) & BIT1) ) { |
| 4344 | |
| 4345 | /* there is more space in the transmit FIFO and */ |
| 4346 | /* there is more data in transmit buffer */ |
| 4347 | |
| 4348 | if ( (info->tx_count > 1) && !info->x_char ) { |
| 4349 | /* write 16-bits */ |
| 4350 | TwoBytes[0] = info->tx_buf[info->tx_get++]; |
| 4351 | if (info->tx_get >= info->max_frame_size) |
| 4352 | info->tx_get -= info->max_frame_size; |
| 4353 | TwoBytes[1] = info->tx_buf[info->tx_get++]; |
| 4354 | if (info->tx_get >= info->max_frame_size) |
| 4355 | info->tx_get -= info->max_frame_size; |
| 4356 | |
| 4357 | write_reg16(info, TRB, *((u16 *)TwoBytes)); |
| 4358 | |
| 4359 | info->tx_count -= 2; |
| 4360 | info->icount.tx += 2; |
| 4361 | } else { |
| 4362 | /* only 1 byte left to transmit or 1 FIFO slot left */ |
| 4363 | |
| 4364 | if (info->x_char) { |
| 4365 | /* transmit pending high priority char */ |
| 4366 | write_reg(info, TRB, info->x_char); |
| 4367 | info->x_char = 0; |
| 4368 | } else { |
| 4369 | write_reg(info, TRB, info->tx_buf[info->tx_get++]); |
| 4370 | if (info->tx_get >= info->max_frame_size) |
| 4371 | info->tx_get -= info->max_frame_size; |
| 4372 | info->tx_count--; |
| 4373 | } |
| 4374 | info->icount.tx++; |
| 4375 | } |
| 4376 | } |
| 4377 | } |
| 4378 | |
| 4379 | /* Reset a port to a known state |
| 4380 | */ |
| 4381 | void reset_port(SLMP_INFO *info) |
| 4382 | { |
| 4383 | if (info->sca_base) { |
| 4384 | |
| 4385 | tx_stop(info); |
| 4386 | rx_stop(info); |
| 4387 | |
| 4388 | info->serial_signals &= ~(SerialSignal_DTR + SerialSignal_RTS); |
| 4389 | set_signals(info); |
| 4390 | |
| 4391 | /* disable all port interrupts */ |
| 4392 | info->ie0_value = 0; |
| 4393 | info->ie1_value = 0; |
| 4394 | info->ie2_value = 0; |
| 4395 | write_reg(info, IE0, info->ie0_value); |
| 4396 | write_reg(info, IE1, info->ie1_value); |
| 4397 | write_reg(info, IE2, info->ie2_value); |
| 4398 | |
| 4399 | write_reg(info, CMD, CHRESET); |
| 4400 | } |
| 4401 | } |
| 4402 | |
| 4403 | /* Reset all the ports to a known state. |
| 4404 | */ |
| 4405 | void reset_adapter(SLMP_INFO *info) |
| 4406 | { |
| 4407 | int i; |
| 4408 | |
| 4409 | for ( i=0; i < SCA_MAX_PORTS; ++i) { |
| 4410 | if (info->port_array[i]) |
| 4411 | reset_port(info->port_array[i]); |
| 4412 | } |
| 4413 | } |
| 4414 | |
| 4415 | /* Program port for asynchronous communications. |
| 4416 | */ |
| 4417 | void async_mode(SLMP_INFO *info) |
| 4418 | { |
| 4419 | |
| 4420 | unsigned char RegValue; |
| 4421 | |
| 4422 | tx_stop(info); |
| 4423 | rx_stop(info); |
| 4424 | |
| 4425 | /* MD0, Mode Register 0 |
| 4426 | * |
| 4427 | * 07..05 PRCTL<2..0>, Protocol Mode, 000=async |
| 4428 | * 04 AUTO, Auto-enable (RTS/CTS/DCD) |
| 4429 | * 03 Reserved, must be 0 |
| 4430 | * 02 CRCCC, CRC Calculation, 0=disabled |
| 4431 | * 01..00 STOP<1..0> Stop bits (00=1,10=2) |
| 4432 | * |
| 4433 | * 0000 0000 |
| 4434 | */ |
| 4435 | RegValue = 0x00; |
| 4436 | if (info->params.stop_bits != 1) |
| 4437 | RegValue |= BIT1; |
| 4438 | write_reg(info, MD0, RegValue); |
| 4439 | |
| 4440 | /* MD1, Mode Register 1 |
| 4441 | * |
| 4442 | * 07..06 BRATE<1..0>, bit rate, 00=1/1 01=1/16 10=1/32 11=1/64 |
| 4443 | * 05..04 TXCHR<1..0>, tx char size, 00=8 bits,01=7,10=6,11=5 |
| 4444 | * 03..02 RXCHR<1..0>, rx char size |
| 4445 | * 01..00 PMPM<1..0>, Parity mode, 00=none 10=even 11=odd |
| 4446 | * |
| 4447 | * 0100 0000 |
| 4448 | */ |
| 4449 | RegValue = 0x40; |
| 4450 | switch (info->params.data_bits) { |
| 4451 | case 7: RegValue |= BIT4 + BIT2; break; |
| 4452 | case 6: RegValue |= BIT5 + BIT3; break; |
| 4453 | case 5: RegValue |= BIT5 + BIT4 + BIT3 + BIT2; break; |
| 4454 | } |
| 4455 | if (info->params.parity != ASYNC_PARITY_NONE) { |
| 4456 | RegValue |= BIT1; |
| 4457 | if (info->params.parity == ASYNC_PARITY_ODD) |
| 4458 | RegValue |= BIT0; |
| 4459 | } |
| 4460 | write_reg(info, MD1, RegValue); |
| 4461 | |
| 4462 | /* MD2, Mode Register 2 |
| 4463 | * |
| 4464 | * 07..02 Reserved, must be 0 |
Paul Fulghum | 6e8dcee | 2005-09-09 13:02:17 -0700 | [diff] [blame] | 4465 | * 01..00 CNCT<1..0> Channel connection, 00=normal 11=local loopback |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4466 | * |
| 4467 | * 0000 0000 |
| 4468 | */ |
| 4469 | RegValue = 0x00; |
Paul Fulghum | 6e8dcee | 2005-09-09 13:02:17 -0700 | [diff] [blame] | 4470 | if (info->params.loopback) |
| 4471 | RegValue |= (BIT1 + BIT0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4472 | write_reg(info, MD2, RegValue); |
| 4473 | |
| 4474 | /* RXS, Receive clock source |
| 4475 | * |
| 4476 | * 07 Reserved, must be 0 |
| 4477 | * 06..04 RXCS<2..0>, clock source, 000=RxC Pin, 100=BRG, 110=DPLL |
| 4478 | * 03..00 RXBR<3..0>, rate divisor, 0000=1 |
| 4479 | */ |
| 4480 | RegValue=BIT6; |
| 4481 | write_reg(info, RXS, RegValue); |
| 4482 | |
| 4483 | /* TXS, Transmit clock source |
| 4484 | * |
| 4485 | * 07 Reserved, must be 0 |
| 4486 | * 06..04 RXCS<2..0>, clock source, 000=TxC Pin, 100=BRG, 110=Receive Clock |
| 4487 | * 03..00 RXBR<3..0>, rate divisor, 0000=1 |
| 4488 | */ |
| 4489 | RegValue=BIT6; |
| 4490 | write_reg(info, TXS, RegValue); |
| 4491 | |
| 4492 | /* Control Register |
| 4493 | * |
| 4494 | * 6,4,2,0 CLKSEL<3..0>, 0 = TcCLK in, 1 = Auxclk out |
| 4495 | */ |
| 4496 | info->port_array[0]->ctrlreg_value |= (BIT0 << (info->port_num * 2)); |
| 4497 | write_control_reg(info); |
| 4498 | |
| 4499 | tx_set_idle(info); |
| 4500 | |
| 4501 | /* RRC Receive Ready Control 0 |
| 4502 | * |
| 4503 | * 07..05 Reserved, must be 0 |
| 4504 | * 04..00 RRC<4..0> Rx FIFO trigger active 0x00 = 1 byte |
| 4505 | */ |
| 4506 | write_reg(info, RRC, 0x00); |
| 4507 | |
| 4508 | /* TRC0 Transmit Ready Control 0 |
| 4509 | * |
| 4510 | * 07..05 Reserved, must be 0 |
| 4511 | * 04..00 TRC<4..0> Tx FIFO trigger active 0x10 = 16 bytes |
| 4512 | */ |
| 4513 | write_reg(info, TRC0, 0x10); |
| 4514 | |
| 4515 | /* TRC1 Transmit Ready Control 1 |
| 4516 | * |
| 4517 | * 07..05 Reserved, must be 0 |
| 4518 | * 04..00 TRC<4..0> Tx FIFO trigger inactive 0x1e = 31 bytes (full-1) |
| 4519 | */ |
| 4520 | write_reg(info, TRC1, 0x1e); |
| 4521 | |
| 4522 | /* CTL, MSCI control register |
| 4523 | * |
| 4524 | * 07..06 Reserved, set to 0 |
| 4525 | * 05 UDRNC, underrun control, 0=abort 1=CRC+flag (HDLC/BSC) |
| 4526 | * 04 IDLC, idle control, 0=mark 1=idle register |
| 4527 | * 03 BRK, break, 0=off 1 =on (async) |
| 4528 | * 02 SYNCLD, sync char load enable (BSC) 1=enabled |
| 4529 | * 01 GOP, go active on poll (LOOP mode) 1=enabled |
| 4530 | * 00 RTS, RTS output control, 0=active 1=inactive |
| 4531 | * |
| 4532 | * 0001 0001 |
| 4533 | */ |
| 4534 | RegValue = 0x10; |
| 4535 | if (!(info->serial_signals & SerialSignal_RTS)) |
| 4536 | RegValue |= 0x01; |
| 4537 | write_reg(info, CTL, RegValue); |
| 4538 | |
| 4539 | /* enable status interrupts */ |
| 4540 | info->ie0_value |= TXINTE + RXINTE; |
| 4541 | write_reg(info, IE0, info->ie0_value); |
| 4542 | |
| 4543 | /* enable break detect interrupt */ |
| 4544 | info->ie1_value = BRKD; |
| 4545 | write_reg(info, IE1, info->ie1_value); |
| 4546 | |
| 4547 | /* enable rx overrun interrupt */ |
| 4548 | info->ie2_value = OVRN; |
| 4549 | write_reg(info, IE2, info->ie2_value); |
| 4550 | |
| 4551 | set_rate( info, info->params.data_rate * 16 ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4552 | } |
| 4553 | |
| 4554 | /* Program the SCA for HDLC communications. |
| 4555 | */ |
| 4556 | void hdlc_mode(SLMP_INFO *info) |
| 4557 | { |
| 4558 | unsigned char RegValue; |
| 4559 | u32 DpllDivisor; |
| 4560 | |
| 4561 | // Can't use DPLL because SCA outputs recovered clock on RxC when |
| 4562 | // DPLL mode selected. This causes output contention with RxC receiver. |
| 4563 | // Use of DPLL would require external hardware to disable RxC receiver |
| 4564 | // when DPLL mode selected. |
| 4565 | info->params.flags &= ~(HDLC_FLAG_TXC_DPLL + HDLC_FLAG_RXC_DPLL); |
| 4566 | |
| 4567 | /* disable DMA interrupts */ |
| 4568 | write_reg(info, TXDMA + DIR, 0); |
| 4569 | write_reg(info, RXDMA + DIR, 0); |
| 4570 | |
| 4571 | /* MD0, Mode Register 0 |
| 4572 | * |
| 4573 | * 07..05 PRCTL<2..0>, Protocol Mode, 100=HDLC |
| 4574 | * 04 AUTO, Auto-enable (RTS/CTS/DCD) |
| 4575 | * 03 Reserved, must be 0 |
| 4576 | * 02 CRCCC, CRC Calculation, 1=enabled |
| 4577 | * 01 CRC1, CRC selection, 0=CRC-16,1=CRC-CCITT-16 |
| 4578 | * 00 CRC0, CRC initial value, 1 = all 1s |
| 4579 | * |
| 4580 | * 1000 0001 |
| 4581 | */ |
| 4582 | RegValue = 0x81; |
| 4583 | if (info->params.flags & HDLC_FLAG_AUTO_CTS) |
| 4584 | RegValue |= BIT4; |
| 4585 | if (info->params.flags & HDLC_FLAG_AUTO_DCD) |
| 4586 | RegValue |= BIT4; |
| 4587 | if (info->params.crc_type == HDLC_CRC_16_CCITT) |
| 4588 | RegValue |= BIT2 + BIT1; |
| 4589 | write_reg(info, MD0, RegValue); |
| 4590 | |
| 4591 | /* MD1, Mode Register 1 |
| 4592 | * |
| 4593 | * 07..06 ADDRS<1..0>, Address detect, 00=no addr check |
| 4594 | * 05..04 TXCHR<1..0>, tx char size, 00=8 bits |
| 4595 | * 03..02 RXCHR<1..0>, rx char size, 00=8 bits |
| 4596 | * 01..00 PMPM<1..0>, Parity mode, 00=no parity |
| 4597 | * |
| 4598 | * 0000 0000 |
| 4599 | */ |
| 4600 | RegValue = 0x00; |
| 4601 | write_reg(info, MD1, RegValue); |
| 4602 | |
| 4603 | /* MD2, Mode Register 2 |
| 4604 | * |
| 4605 | * 07 NRZFM, 0=NRZ, 1=FM |
| 4606 | * 06..05 CODE<1..0> Encoding, 00=NRZ |
| 4607 | * 04..03 DRATE<1..0> DPLL Divisor, 00=8 |
| 4608 | * 02 Reserved, must be 0 |
| 4609 | * 01..00 CNCT<1..0> Channel connection, 0=normal |
| 4610 | * |
| 4611 | * 0000 0000 |
| 4612 | */ |
| 4613 | RegValue = 0x00; |
| 4614 | switch(info->params.encoding) { |
| 4615 | case HDLC_ENCODING_NRZI: RegValue |= BIT5; break; |
| 4616 | case HDLC_ENCODING_BIPHASE_MARK: RegValue |= BIT7 + BIT5; break; /* aka FM1 */ |
| 4617 | case HDLC_ENCODING_BIPHASE_SPACE: RegValue |= BIT7 + BIT6; break; /* aka FM0 */ |
| 4618 | case HDLC_ENCODING_BIPHASE_LEVEL: RegValue |= BIT7; break; /* aka Manchester */ |
| 4619 | #if 0 |
| 4620 | case HDLC_ENCODING_NRZB: /* not supported */ |
| 4621 | case HDLC_ENCODING_NRZI_MARK: /* not supported */ |
| 4622 | case HDLC_ENCODING_DIFF_BIPHASE_LEVEL: /* not supported */ |
| 4623 | #endif |
| 4624 | } |
| 4625 | if ( info->params.flags & HDLC_FLAG_DPLL_DIV16 ) { |
| 4626 | DpllDivisor = 16; |
| 4627 | RegValue |= BIT3; |
| 4628 | } else if ( info->params.flags & HDLC_FLAG_DPLL_DIV8 ) { |
| 4629 | DpllDivisor = 8; |
| 4630 | } else { |
| 4631 | DpllDivisor = 32; |
| 4632 | RegValue |= BIT4; |
| 4633 | } |
| 4634 | write_reg(info, MD2, RegValue); |
| 4635 | |
| 4636 | |
| 4637 | /* RXS, Receive clock source |
| 4638 | * |
| 4639 | * 07 Reserved, must be 0 |
| 4640 | * 06..04 RXCS<2..0>, clock source, 000=RxC Pin, 100=BRG, 110=DPLL |
| 4641 | * 03..00 RXBR<3..0>, rate divisor, 0000=1 |
| 4642 | */ |
| 4643 | RegValue=0; |
| 4644 | if (info->params.flags & HDLC_FLAG_RXC_BRG) |
| 4645 | RegValue |= BIT6; |
| 4646 | if (info->params.flags & HDLC_FLAG_RXC_DPLL) |
| 4647 | RegValue |= BIT6 + BIT5; |
| 4648 | write_reg(info, RXS, RegValue); |
| 4649 | |
| 4650 | /* TXS, Transmit clock source |
| 4651 | * |
| 4652 | * 07 Reserved, must be 0 |
| 4653 | * 06..04 RXCS<2..0>, clock source, 000=TxC Pin, 100=BRG, 110=Receive Clock |
| 4654 | * 03..00 RXBR<3..0>, rate divisor, 0000=1 |
| 4655 | */ |
| 4656 | RegValue=0; |
| 4657 | if (info->params.flags & HDLC_FLAG_TXC_BRG) |
| 4658 | RegValue |= BIT6; |
| 4659 | if (info->params.flags & HDLC_FLAG_TXC_DPLL) |
| 4660 | RegValue |= BIT6 + BIT5; |
| 4661 | write_reg(info, TXS, RegValue); |
| 4662 | |
| 4663 | if (info->params.flags & HDLC_FLAG_RXC_DPLL) |
| 4664 | set_rate(info, info->params.clock_speed * DpllDivisor); |
| 4665 | else |
| 4666 | set_rate(info, info->params.clock_speed); |
| 4667 | |
| 4668 | /* GPDATA (General Purpose I/O Data Register) |
| 4669 | * |
| 4670 | * 6,4,2,0 CLKSEL<3..0>, 0 = TcCLK in, 1 = Auxclk out |
| 4671 | */ |
| 4672 | if (info->params.flags & HDLC_FLAG_TXC_BRG) |
| 4673 | info->port_array[0]->ctrlreg_value |= (BIT0 << (info->port_num * 2)); |
| 4674 | else |
| 4675 | info->port_array[0]->ctrlreg_value &= ~(BIT0 << (info->port_num * 2)); |
| 4676 | write_control_reg(info); |
| 4677 | |
| 4678 | /* RRC Receive Ready Control 0 |
| 4679 | * |
| 4680 | * 07..05 Reserved, must be 0 |
| 4681 | * 04..00 RRC<4..0> Rx FIFO trigger active |
| 4682 | */ |
| 4683 | write_reg(info, RRC, rx_active_fifo_level); |
| 4684 | |
| 4685 | /* TRC0 Transmit Ready Control 0 |
| 4686 | * |
| 4687 | * 07..05 Reserved, must be 0 |
| 4688 | * 04..00 TRC<4..0> Tx FIFO trigger active |
| 4689 | */ |
| 4690 | write_reg(info, TRC0, tx_active_fifo_level); |
| 4691 | |
| 4692 | /* TRC1 Transmit Ready Control 1 |
| 4693 | * |
| 4694 | * 07..05 Reserved, must be 0 |
| 4695 | * 04..00 TRC<4..0> Tx FIFO trigger inactive 0x1f = 32 bytes (full) |
| 4696 | */ |
| 4697 | write_reg(info, TRC1, (unsigned char)(tx_negate_fifo_level - 1)); |
| 4698 | |
| 4699 | /* DMR, DMA Mode Register |
| 4700 | * |
| 4701 | * 07..05 Reserved, must be 0 |
| 4702 | * 04 TMOD, Transfer Mode: 1=chained-block |
| 4703 | * 03 Reserved, must be 0 |
| 4704 | * 02 NF, Number of Frames: 1=multi-frame |
| 4705 | * 01 CNTE, Frame End IRQ Counter enable: 0=disabled |
| 4706 | * 00 Reserved, must be 0 |
| 4707 | * |
| 4708 | * 0001 0100 |
| 4709 | */ |
| 4710 | write_reg(info, TXDMA + DMR, 0x14); |
| 4711 | write_reg(info, RXDMA + DMR, 0x14); |
| 4712 | |
| 4713 | /* Set chain pointer base (upper 8 bits of 24 bit addr) */ |
| 4714 | write_reg(info, RXDMA + CPB, |
| 4715 | (unsigned char)(info->buffer_list_phys >> 16)); |
| 4716 | |
| 4717 | /* Set chain pointer base (upper 8 bits of 24 bit addr) */ |
| 4718 | write_reg(info, TXDMA + CPB, |
| 4719 | (unsigned char)(info->buffer_list_phys >> 16)); |
| 4720 | |
| 4721 | /* enable status interrupts. other code enables/disables |
| 4722 | * the individual sources for these two interrupt classes. |
| 4723 | */ |
| 4724 | info->ie0_value |= TXINTE + RXINTE; |
| 4725 | write_reg(info, IE0, info->ie0_value); |
| 4726 | |
| 4727 | /* CTL, MSCI control register |
| 4728 | * |
| 4729 | * 07..06 Reserved, set to 0 |
| 4730 | * 05 UDRNC, underrun control, 0=abort 1=CRC+flag (HDLC/BSC) |
| 4731 | * 04 IDLC, idle control, 0=mark 1=idle register |
| 4732 | * 03 BRK, break, 0=off 1 =on (async) |
| 4733 | * 02 SYNCLD, sync char load enable (BSC) 1=enabled |
| 4734 | * 01 GOP, go active on poll (LOOP mode) 1=enabled |
| 4735 | * 00 RTS, RTS output control, 0=active 1=inactive |
| 4736 | * |
| 4737 | * 0001 0001 |
| 4738 | */ |
| 4739 | RegValue = 0x10; |
| 4740 | if (!(info->serial_signals & SerialSignal_RTS)) |
| 4741 | RegValue |= 0x01; |
| 4742 | write_reg(info, CTL, RegValue); |
| 4743 | |
| 4744 | /* preamble not supported ! */ |
| 4745 | |
| 4746 | tx_set_idle(info); |
| 4747 | tx_stop(info); |
| 4748 | rx_stop(info); |
| 4749 | |
| 4750 | set_rate(info, info->params.clock_speed); |
| 4751 | |
| 4752 | if (info->params.loopback) |
| 4753 | enable_loopback(info,1); |
| 4754 | } |
| 4755 | |
| 4756 | /* Set the transmit HDLC idle mode |
| 4757 | */ |
| 4758 | void tx_set_idle(SLMP_INFO *info) |
| 4759 | { |
| 4760 | unsigned char RegValue = 0xff; |
| 4761 | |
| 4762 | /* Map API idle mode to SCA register bits */ |
| 4763 | switch(info->idle_mode) { |
| 4764 | case HDLC_TXIDLE_FLAGS: RegValue = 0x7e; break; |
| 4765 | case HDLC_TXIDLE_ALT_ZEROS_ONES: RegValue = 0xaa; break; |
| 4766 | case HDLC_TXIDLE_ZEROS: RegValue = 0x00; break; |
| 4767 | case HDLC_TXIDLE_ONES: RegValue = 0xff; break; |
| 4768 | case HDLC_TXIDLE_ALT_MARK_SPACE: RegValue = 0xaa; break; |
| 4769 | case HDLC_TXIDLE_SPACE: RegValue = 0x00; break; |
| 4770 | case HDLC_TXIDLE_MARK: RegValue = 0xff; break; |
| 4771 | } |
| 4772 | |
| 4773 | write_reg(info, IDL, RegValue); |
| 4774 | } |
| 4775 | |
| 4776 | /* Query the adapter for the state of the V24 status (input) signals. |
| 4777 | */ |
| 4778 | void get_signals(SLMP_INFO *info) |
| 4779 | { |
| 4780 | u16 status = read_reg(info, SR3); |
| 4781 | u16 gpstatus = read_status_reg(info); |
| 4782 | u16 testbit; |
| 4783 | |
| 4784 | /* clear all serial signals except DTR and RTS */ |
| 4785 | info->serial_signals &= SerialSignal_DTR + SerialSignal_RTS; |
| 4786 | |
| 4787 | /* set serial signal bits to reflect MISR */ |
| 4788 | |
| 4789 | if (!(status & BIT3)) |
| 4790 | info->serial_signals |= SerialSignal_CTS; |
| 4791 | |
| 4792 | if ( !(status & BIT2)) |
| 4793 | info->serial_signals |= SerialSignal_DCD; |
| 4794 | |
| 4795 | testbit = BIT1 << (info->port_num * 2); // Port 0..3 RI is GPDATA<1,3,5,7> |
| 4796 | if (!(gpstatus & testbit)) |
| 4797 | info->serial_signals |= SerialSignal_RI; |
| 4798 | |
| 4799 | testbit = BIT0 << (info->port_num * 2); // Port 0..3 DSR is GPDATA<0,2,4,6> |
| 4800 | if (!(gpstatus & testbit)) |
| 4801 | info->serial_signals |= SerialSignal_DSR; |
| 4802 | } |
| 4803 | |
| 4804 | /* Set the state of DTR and RTS based on contents of |
| 4805 | * serial_signals member of device context. |
| 4806 | */ |
| 4807 | void set_signals(SLMP_INFO *info) |
| 4808 | { |
| 4809 | unsigned char RegValue; |
| 4810 | u16 EnableBit; |
| 4811 | |
| 4812 | RegValue = read_reg(info, CTL); |
| 4813 | if (info->serial_signals & SerialSignal_RTS) |
| 4814 | RegValue &= ~BIT0; |
| 4815 | else |
| 4816 | RegValue |= BIT0; |
| 4817 | write_reg(info, CTL, RegValue); |
| 4818 | |
| 4819 | // Port 0..3 DTR is ctrl reg <1,3,5,7> |
| 4820 | EnableBit = BIT1 << (info->port_num*2); |
| 4821 | if (info->serial_signals & SerialSignal_DTR) |
| 4822 | info->port_array[0]->ctrlreg_value &= ~EnableBit; |
| 4823 | else |
| 4824 | info->port_array[0]->ctrlreg_value |= EnableBit; |
| 4825 | write_control_reg(info); |
| 4826 | } |
| 4827 | |
| 4828 | /*******************/ |
| 4829 | /* DMA Buffer Code */ |
| 4830 | /*******************/ |
| 4831 | |
| 4832 | /* Set the count for all receive buffers to SCABUFSIZE |
| 4833 | * and set the current buffer to the first buffer. This effectively |
| 4834 | * makes all buffers free and discards any data in buffers. |
| 4835 | */ |
| 4836 | void rx_reset_buffers(SLMP_INFO *info) |
| 4837 | { |
| 4838 | rx_free_frame_buffers(info, 0, info->rx_buf_count - 1); |
| 4839 | } |
| 4840 | |
| 4841 | /* Free the buffers used by a received frame |
| 4842 | * |
| 4843 | * info pointer to device instance data |
| 4844 | * first index of 1st receive buffer of frame |
| 4845 | * last index of last receive buffer of frame |
| 4846 | */ |
| 4847 | void rx_free_frame_buffers(SLMP_INFO *info, unsigned int first, unsigned int last) |
| 4848 | { |
| 4849 | int done = 0; |
| 4850 | |
| 4851 | while(!done) { |
| 4852 | /* reset current buffer for reuse */ |
| 4853 | info->rx_buf_list[first].status = 0xff; |
| 4854 | |
| 4855 | if (first == last) { |
| 4856 | done = 1; |
| 4857 | /* set new last rx descriptor address */ |
| 4858 | write_reg16(info, RXDMA + EDA, info->rx_buf_list_ex[first].phys_entry); |
| 4859 | } |
| 4860 | |
| 4861 | first++; |
| 4862 | if (first == info->rx_buf_count) |
| 4863 | first = 0; |
| 4864 | } |
| 4865 | |
| 4866 | /* set current buffer to next buffer after last buffer of frame */ |
| 4867 | info->current_rx_buf = first; |
| 4868 | } |
| 4869 | |
| 4870 | /* Return a received frame from the receive DMA buffers. |
| 4871 | * Only frames received without errors are returned. |
| 4872 | * |
| 4873 | * Return Value: 1 if frame returned, otherwise 0 |
| 4874 | */ |
| 4875 | int rx_get_frame(SLMP_INFO *info) |
| 4876 | { |
| 4877 | unsigned int StartIndex, EndIndex; /* index of 1st and last buffers of Rx frame */ |
| 4878 | unsigned short status; |
| 4879 | unsigned int framesize = 0; |
| 4880 | int ReturnCode = 0; |
| 4881 | unsigned long flags; |
| 4882 | struct tty_struct *tty = info->tty; |
| 4883 | unsigned char addr_field = 0xff; |
| 4884 | SCADESC *desc; |
| 4885 | SCADESC_EX *desc_ex; |
| 4886 | |
| 4887 | CheckAgain: |
| 4888 | /* assume no frame returned, set zero length */ |
| 4889 | framesize = 0; |
| 4890 | addr_field = 0xff; |
| 4891 | |
| 4892 | /* |
| 4893 | * current_rx_buf points to the 1st buffer of the next available |
| 4894 | * receive frame. To find the last buffer of the frame look for |
| 4895 | * a non-zero status field in the buffer entries. (The status |
| 4896 | * field is set by the 16C32 after completing a receive frame. |
| 4897 | */ |
| 4898 | StartIndex = EndIndex = info->current_rx_buf; |
| 4899 | |
| 4900 | for ( ;; ) { |
| 4901 | desc = &info->rx_buf_list[EndIndex]; |
| 4902 | desc_ex = &info->rx_buf_list_ex[EndIndex]; |
| 4903 | |
| 4904 | if (desc->status == 0xff) |
| 4905 | goto Cleanup; /* current desc still in use, no frames available */ |
| 4906 | |
| 4907 | if (framesize == 0 && info->params.addr_filter != 0xff) |
| 4908 | addr_field = desc_ex->virt_addr[0]; |
| 4909 | |
| 4910 | framesize += desc->length; |
| 4911 | |
| 4912 | /* Status != 0 means last buffer of frame */ |
| 4913 | if (desc->status) |
| 4914 | break; |
| 4915 | |
| 4916 | EndIndex++; |
| 4917 | if (EndIndex == info->rx_buf_count) |
| 4918 | EndIndex = 0; |
| 4919 | |
| 4920 | if (EndIndex == info->current_rx_buf) { |
| 4921 | /* all buffers have been 'used' but none mark */ |
| 4922 | /* the end of a frame. Reset buffers and receiver. */ |
| 4923 | if ( info->rx_enabled ){ |
| 4924 | spin_lock_irqsave(&info->lock,flags); |
| 4925 | rx_start(info); |
| 4926 | spin_unlock_irqrestore(&info->lock,flags); |
| 4927 | } |
| 4928 | goto Cleanup; |
| 4929 | } |
| 4930 | |
| 4931 | } |
| 4932 | |
| 4933 | /* check status of receive frame */ |
| 4934 | |
| 4935 | /* frame status is byte stored after frame data |
| 4936 | * |
| 4937 | * 7 EOM (end of msg), 1 = last buffer of frame |
| 4938 | * 6 Short Frame, 1 = short frame |
| 4939 | * 5 Abort, 1 = frame aborted |
| 4940 | * 4 Residue, 1 = last byte is partial |
| 4941 | * 3 Overrun, 1 = overrun occurred during frame reception |
| 4942 | * 2 CRC, 1 = CRC error detected |
| 4943 | * |
| 4944 | */ |
| 4945 | status = desc->status; |
| 4946 | |
| 4947 | /* ignore CRC bit if not using CRC (bit is undefined) */ |
| 4948 | /* Note:CRC is not save to data buffer */ |
| 4949 | if (info->params.crc_type == HDLC_CRC_NONE) |
| 4950 | status &= ~BIT2; |
| 4951 | |
| 4952 | if (framesize == 0 || |
| 4953 | (addr_field != 0xff && addr_field != info->params.addr_filter)) { |
| 4954 | /* discard 0 byte frames, this seems to occur sometime |
| 4955 | * when remote is idling flags. |
| 4956 | */ |
| 4957 | rx_free_frame_buffers(info, StartIndex, EndIndex); |
| 4958 | goto CheckAgain; |
| 4959 | } |
| 4960 | |
| 4961 | if (framesize < 2) |
| 4962 | status |= BIT6; |
| 4963 | |
| 4964 | if (status & (BIT6+BIT5+BIT3+BIT2)) { |
| 4965 | /* received frame has errors, |
| 4966 | * update counts and mark frame size as 0 |
| 4967 | */ |
| 4968 | if (status & BIT6) |
| 4969 | info->icount.rxshort++; |
| 4970 | else if (status & BIT5) |
| 4971 | info->icount.rxabort++; |
| 4972 | else if (status & BIT3) |
| 4973 | info->icount.rxover++; |
| 4974 | else |
| 4975 | info->icount.rxcrc++; |
| 4976 | |
| 4977 | framesize = 0; |
| 4978 | #ifdef CONFIG_HDLC |
| 4979 | { |
| 4980 | struct net_device_stats *stats = hdlc_stats(info->netdev); |
| 4981 | stats->rx_errors++; |
| 4982 | stats->rx_frame_errors++; |
| 4983 | } |
| 4984 | #endif |
| 4985 | } |
| 4986 | |
| 4987 | if ( debug_level >= DEBUG_LEVEL_BH ) |
| 4988 | printk("%s(%d):%s rx_get_frame() status=%04X size=%d\n", |
| 4989 | __FILE__,__LINE__,info->device_name,status,framesize); |
| 4990 | |
| 4991 | if ( debug_level >= DEBUG_LEVEL_DATA ) |
| 4992 | trace_block(info,info->rx_buf_list_ex[StartIndex].virt_addr, |
| 4993 | min_t(int, framesize,SCABUFSIZE),0); |
| 4994 | |
| 4995 | if (framesize) { |
| 4996 | if (framesize > info->max_frame_size) |
| 4997 | info->icount.rxlong++; |
| 4998 | else { |
| 4999 | /* copy dma buffer(s) to contiguous intermediate buffer */ |
| 5000 | int copy_count = framesize; |
| 5001 | int index = StartIndex; |
| 5002 | unsigned char *ptmp = info->tmp_rx_buf; |
| 5003 | info->tmp_rx_buf_count = framesize; |
| 5004 | |
| 5005 | info->icount.rxok++; |
| 5006 | |
| 5007 | while(copy_count) { |
| 5008 | int partial_count = min(copy_count,SCABUFSIZE); |
| 5009 | memcpy( ptmp, |
| 5010 | info->rx_buf_list_ex[index].virt_addr, |
| 5011 | partial_count ); |
| 5012 | ptmp += partial_count; |
| 5013 | copy_count -= partial_count; |
| 5014 | |
| 5015 | if ( ++index == info->rx_buf_count ) |
| 5016 | index = 0; |
| 5017 | } |
| 5018 | |
| 5019 | #ifdef CONFIG_HDLC |
| 5020 | if (info->netcount) |
| 5021 | hdlcdev_rx(info,info->tmp_rx_buf,framesize); |
| 5022 | else |
| 5023 | #endif |
| 5024 | ldisc_receive_buf(tty,info->tmp_rx_buf, |
| 5025 | info->flag_buf, framesize); |
| 5026 | } |
| 5027 | } |
| 5028 | /* Free the buffers used by this frame. */ |
| 5029 | rx_free_frame_buffers( info, StartIndex, EndIndex ); |
| 5030 | |
| 5031 | ReturnCode = 1; |
| 5032 | |
| 5033 | Cleanup: |
| 5034 | if ( info->rx_enabled && info->rx_overflow ) { |
| 5035 | /* Receiver is enabled, but needs to restarted due to |
| 5036 | * rx buffer overflow. If buffers are empty, restart receiver. |
| 5037 | */ |
| 5038 | if (info->rx_buf_list[EndIndex].status == 0xff) { |
| 5039 | spin_lock_irqsave(&info->lock,flags); |
| 5040 | rx_start(info); |
| 5041 | spin_unlock_irqrestore(&info->lock,flags); |
| 5042 | } |
| 5043 | } |
| 5044 | |
| 5045 | return ReturnCode; |
| 5046 | } |
| 5047 | |
| 5048 | /* load the transmit DMA buffer with data |
| 5049 | */ |
| 5050 | void tx_load_dma_buffer(SLMP_INFO *info, const char *buf, unsigned int count) |
| 5051 | { |
| 5052 | unsigned short copy_count; |
| 5053 | unsigned int i = 0; |
| 5054 | SCADESC *desc; |
| 5055 | SCADESC_EX *desc_ex; |
| 5056 | |
| 5057 | if ( debug_level >= DEBUG_LEVEL_DATA ) |
| 5058 | trace_block(info,buf, min_t(int, count,SCABUFSIZE), 1); |
| 5059 | |
| 5060 | /* Copy source buffer to one or more DMA buffers, starting with |
| 5061 | * the first transmit dma buffer. |
| 5062 | */ |
| 5063 | for(i=0;;) |
| 5064 | { |
| 5065 | copy_count = min_t(unsigned short,count,SCABUFSIZE); |
| 5066 | |
| 5067 | desc = &info->tx_buf_list[i]; |
| 5068 | desc_ex = &info->tx_buf_list_ex[i]; |
| 5069 | |
| 5070 | load_pci_memory(info, desc_ex->virt_addr,buf,copy_count); |
| 5071 | |
| 5072 | desc->length = copy_count; |
| 5073 | desc->status = 0; |
| 5074 | |
| 5075 | buf += copy_count; |
| 5076 | count -= copy_count; |
| 5077 | |
| 5078 | if (!count) |
| 5079 | break; |
| 5080 | |
| 5081 | i++; |
| 5082 | if (i >= info->tx_buf_count) |
| 5083 | i = 0; |
| 5084 | } |
| 5085 | |
| 5086 | info->tx_buf_list[i].status = 0x81; /* set EOM and EOT status */ |
| 5087 | info->last_tx_buf = ++i; |
| 5088 | } |
| 5089 | |
| 5090 | int register_test(SLMP_INFO *info) |
| 5091 | { |
| 5092 | static unsigned char testval[] = {0x00, 0xff, 0xaa, 0x55, 0x69, 0x96}; |
Tobias Klauser | fe97107 | 2006-01-09 20:54:02 -0800 | [diff] [blame] | 5093 | static unsigned int count = ARRAY_SIZE(testval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5094 | unsigned int i; |
| 5095 | int rc = TRUE; |
| 5096 | unsigned long flags; |
| 5097 | |
| 5098 | spin_lock_irqsave(&info->lock,flags); |
| 5099 | reset_port(info); |
| 5100 | |
| 5101 | /* assume failure */ |
| 5102 | info->init_error = DiagStatus_AddressFailure; |
| 5103 | |
| 5104 | /* Write bit patterns to various registers but do it out of */ |
| 5105 | /* sync, then read back and verify values. */ |
| 5106 | |
| 5107 | for (i = 0 ; i < count ; i++) { |
| 5108 | write_reg(info, TMC, testval[i]); |
| 5109 | write_reg(info, IDL, testval[(i+1)%count]); |
| 5110 | write_reg(info, SA0, testval[(i+2)%count]); |
| 5111 | write_reg(info, SA1, testval[(i+3)%count]); |
| 5112 | |
| 5113 | if ( (read_reg(info, TMC) != testval[i]) || |
| 5114 | (read_reg(info, IDL) != testval[(i+1)%count]) || |
| 5115 | (read_reg(info, SA0) != testval[(i+2)%count]) || |
| 5116 | (read_reg(info, SA1) != testval[(i+3)%count]) ) |
| 5117 | { |
| 5118 | rc = FALSE; |
| 5119 | break; |
| 5120 | } |
| 5121 | } |
| 5122 | |
| 5123 | reset_port(info); |
| 5124 | spin_unlock_irqrestore(&info->lock,flags); |
| 5125 | |
| 5126 | return rc; |
| 5127 | } |
| 5128 | |
| 5129 | int irq_test(SLMP_INFO *info) |
| 5130 | { |
| 5131 | unsigned long timeout; |
| 5132 | unsigned long flags; |
| 5133 | |
| 5134 | unsigned char timer = (info->port_num & 1) ? TIMER2 : TIMER0; |
| 5135 | |
| 5136 | spin_lock_irqsave(&info->lock,flags); |
| 5137 | reset_port(info); |
| 5138 | |
| 5139 | /* assume failure */ |
| 5140 | info->init_error = DiagStatus_IrqFailure; |
| 5141 | info->irq_occurred = FALSE; |
| 5142 | |
| 5143 | /* setup timer0 on SCA0 to interrupt */ |
| 5144 | |
| 5145 | /* IER2<7..4> = timer<3..0> interrupt enables (1=enabled) */ |
| 5146 | write_reg(info, IER2, (unsigned char)((info->port_num & 1) ? BIT6 : BIT4)); |
| 5147 | |
| 5148 | write_reg(info, (unsigned char)(timer + TEPR), 0); /* timer expand prescale */ |
| 5149 | write_reg16(info, (unsigned char)(timer + TCONR), 1); /* timer constant */ |
| 5150 | |
| 5151 | |
| 5152 | /* TMCS, Timer Control/Status Register |
| 5153 | * |
| 5154 | * 07 CMF, Compare match flag (read only) 1=match |
| 5155 | * 06 ECMI, CMF Interrupt Enable: 1=enabled |
| 5156 | * 05 Reserved, must be 0 |
| 5157 | * 04 TME, Timer Enable |
| 5158 | * 03..00 Reserved, must be 0 |
| 5159 | * |
| 5160 | * 0101 0000 |
| 5161 | */ |
| 5162 | write_reg(info, (unsigned char)(timer + TMCS), 0x50); |
| 5163 | |
| 5164 | spin_unlock_irqrestore(&info->lock,flags); |
| 5165 | |
| 5166 | timeout=100; |
| 5167 | while( timeout-- && !info->irq_occurred ) { |
| 5168 | msleep_interruptible(10); |
| 5169 | } |
| 5170 | |
| 5171 | spin_lock_irqsave(&info->lock,flags); |
| 5172 | reset_port(info); |
| 5173 | spin_unlock_irqrestore(&info->lock,flags); |
| 5174 | |
| 5175 | return info->irq_occurred; |
| 5176 | } |
| 5177 | |
| 5178 | /* initialize individual SCA device (2 ports) |
| 5179 | */ |
| 5180 | static int sca_init(SLMP_INFO *info) |
| 5181 | { |
| 5182 | /* set wait controller to single mem partition (low), no wait states */ |
| 5183 | write_reg(info, PABR0, 0); /* wait controller addr boundary 0 */ |
| 5184 | write_reg(info, PABR1, 0); /* wait controller addr boundary 1 */ |
| 5185 | write_reg(info, WCRL, 0); /* wait controller low range */ |
| 5186 | write_reg(info, WCRM, 0); /* wait controller mid range */ |
| 5187 | write_reg(info, WCRH, 0); /* wait controller high range */ |
| 5188 | |
| 5189 | /* DPCR, DMA Priority Control |
| 5190 | * |
| 5191 | * 07..05 Not used, must be 0 |
| 5192 | * 04 BRC, bus release condition: 0=all transfers complete |
| 5193 | * 03 CCC, channel change condition: 0=every cycle |
| 5194 | * 02..00 PR<2..0>, priority 100=round robin |
| 5195 | * |
| 5196 | * 00000100 = 0x04 |
| 5197 | */ |
| 5198 | write_reg(info, DPCR, dma_priority); |
| 5199 | |
| 5200 | /* DMA Master Enable, BIT7: 1=enable all channels */ |
| 5201 | write_reg(info, DMER, 0x80); |
| 5202 | |
| 5203 | /* enable all interrupt classes */ |
| 5204 | write_reg(info, IER0, 0xff); /* TxRDY,RxRDY,TxINT,RxINT (ports 0-1) */ |
| 5205 | write_reg(info, IER1, 0xff); /* DMIB,DMIA (channels 0-3) */ |
| 5206 | write_reg(info, IER2, 0xf0); /* TIRQ (timers 0-3) */ |
| 5207 | |
| 5208 | /* ITCR, interrupt control register |
| 5209 | * 07 IPC, interrupt priority, 0=MSCI->DMA |
| 5210 | * 06..05 IAK<1..0>, Acknowledge cycle, 00=non-ack cycle |
| 5211 | * 04 VOS, Vector Output, 0=unmodified vector |
| 5212 | * 03..00 Reserved, must be 0 |
| 5213 | */ |
| 5214 | write_reg(info, ITCR, 0); |
| 5215 | |
| 5216 | return TRUE; |
| 5217 | } |
| 5218 | |
| 5219 | /* initialize adapter hardware |
| 5220 | */ |
| 5221 | int init_adapter(SLMP_INFO *info) |
| 5222 | { |
| 5223 | int i; |
| 5224 | |
| 5225 | /* Set BIT30 of Local Control Reg 0x50 to reset SCA */ |
| 5226 | volatile u32 *MiscCtrl = (u32 *)(info->lcr_base + 0x50); |
| 5227 | u32 readval; |
| 5228 | |
| 5229 | info->misc_ctrl_value |= BIT30; |
| 5230 | *MiscCtrl = info->misc_ctrl_value; |
| 5231 | |
| 5232 | /* |
| 5233 | * Force at least 170ns delay before clearing |
| 5234 | * reset bit. Each read from LCR takes at least |
| 5235 | * 30ns so 10 times for 300ns to be safe. |
| 5236 | */ |
| 5237 | for(i=0;i<10;i++) |
| 5238 | readval = *MiscCtrl; |
| 5239 | |
| 5240 | info->misc_ctrl_value &= ~BIT30; |
| 5241 | *MiscCtrl = info->misc_ctrl_value; |
| 5242 | |
| 5243 | /* init control reg (all DTRs off, all clksel=input) */ |
| 5244 | info->ctrlreg_value = 0xaa; |
| 5245 | write_control_reg(info); |
| 5246 | |
| 5247 | { |
| 5248 | volatile u32 *LCR1BRDR = (u32 *)(info->lcr_base + 0x2c); |
| 5249 | lcr1_brdr_value &= ~(BIT5 + BIT4 + BIT3); |
| 5250 | |
| 5251 | switch(read_ahead_count) |
| 5252 | { |
| 5253 | case 16: |
| 5254 | lcr1_brdr_value |= BIT5 + BIT4 + BIT3; |
| 5255 | break; |
| 5256 | case 8: |
| 5257 | lcr1_brdr_value |= BIT5 + BIT4; |
| 5258 | break; |
| 5259 | case 4: |
| 5260 | lcr1_brdr_value |= BIT5 + BIT3; |
| 5261 | break; |
| 5262 | case 0: |
| 5263 | lcr1_brdr_value |= BIT5; |
| 5264 | break; |
| 5265 | } |
| 5266 | |
| 5267 | *LCR1BRDR = lcr1_brdr_value; |
| 5268 | *MiscCtrl = misc_ctrl_value; |
| 5269 | } |
| 5270 | |
| 5271 | sca_init(info->port_array[0]); |
| 5272 | sca_init(info->port_array[2]); |
| 5273 | |
| 5274 | return TRUE; |
| 5275 | } |
| 5276 | |
| 5277 | /* Loopback an HDLC frame to test the hardware |
| 5278 | * interrupt and DMA functions. |
| 5279 | */ |
| 5280 | int loopback_test(SLMP_INFO *info) |
| 5281 | { |
| 5282 | #define TESTFRAMESIZE 20 |
| 5283 | |
| 5284 | unsigned long timeout; |
| 5285 | u16 count = TESTFRAMESIZE; |
| 5286 | unsigned char buf[TESTFRAMESIZE]; |
| 5287 | int rc = FALSE; |
| 5288 | unsigned long flags; |
| 5289 | |
| 5290 | struct tty_struct *oldtty = info->tty; |
| 5291 | u32 speed = info->params.clock_speed; |
| 5292 | |
| 5293 | info->params.clock_speed = 3686400; |
| 5294 | info->tty = NULL; |
| 5295 | |
| 5296 | /* assume failure */ |
| 5297 | info->init_error = DiagStatus_DmaFailure; |
| 5298 | |
| 5299 | /* build and send transmit frame */ |
| 5300 | for (count = 0; count < TESTFRAMESIZE;++count) |
| 5301 | buf[count] = (unsigned char)count; |
| 5302 | |
| 5303 | memset(info->tmp_rx_buf,0,TESTFRAMESIZE); |
| 5304 | |
| 5305 | /* program hardware for HDLC and enabled receiver */ |
| 5306 | spin_lock_irqsave(&info->lock,flags); |
| 5307 | hdlc_mode(info); |
| 5308 | enable_loopback(info,1); |
| 5309 | rx_start(info); |
| 5310 | info->tx_count = count; |
| 5311 | tx_load_dma_buffer(info,buf,count); |
| 5312 | tx_start(info); |
| 5313 | spin_unlock_irqrestore(&info->lock,flags); |
| 5314 | |
| 5315 | /* wait for receive complete */ |
| 5316 | /* Set a timeout for waiting for interrupt. */ |
| 5317 | for ( timeout = 100; timeout; --timeout ) { |
| 5318 | msleep_interruptible(10); |
| 5319 | |
| 5320 | if (rx_get_frame(info)) { |
| 5321 | rc = TRUE; |
| 5322 | break; |
| 5323 | } |
| 5324 | } |
| 5325 | |
| 5326 | /* verify received frame length and contents */ |
| 5327 | if (rc == TRUE && |
| 5328 | ( info->tmp_rx_buf_count != count || |
| 5329 | memcmp(buf, info->tmp_rx_buf,count))) { |
| 5330 | rc = FALSE; |
| 5331 | } |
| 5332 | |
| 5333 | spin_lock_irqsave(&info->lock,flags); |
| 5334 | reset_adapter(info); |
| 5335 | spin_unlock_irqrestore(&info->lock,flags); |
| 5336 | |
| 5337 | info->params.clock_speed = speed; |
| 5338 | info->tty = oldtty; |
| 5339 | |
| 5340 | return rc; |
| 5341 | } |
| 5342 | |
| 5343 | /* Perform diagnostics on hardware |
| 5344 | */ |
| 5345 | int adapter_test( SLMP_INFO *info ) |
| 5346 | { |
| 5347 | unsigned long flags; |
| 5348 | if ( debug_level >= DEBUG_LEVEL_INFO ) |
| 5349 | printk( "%s(%d):Testing device %s\n", |
| 5350 | __FILE__,__LINE__,info->device_name ); |
| 5351 | |
| 5352 | spin_lock_irqsave(&info->lock,flags); |
| 5353 | init_adapter(info); |
| 5354 | spin_unlock_irqrestore(&info->lock,flags); |
| 5355 | |
| 5356 | info->port_array[0]->port_count = 0; |
| 5357 | |
| 5358 | if ( register_test(info->port_array[0]) && |
| 5359 | register_test(info->port_array[1])) { |
| 5360 | |
| 5361 | info->port_array[0]->port_count = 2; |
| 5362 | |
| 5363 | if ( register_test(info->port_array[2]) && |
| 5364 | register_test(info->port_array[3]) ) |
| 5365 | info->port_array[0]->port_count += 2; |
| 5366 | } |
| 5367 | else { |
| 5368 | printk( "%s(%d):Register test failure for device %s Addr=%08lX\n", |
| 5369 | __FILE__,__LINE__,info->device_name, (unsigned long)(info->phys_sca_base)); |
| 5370 | return -ENODEV; |
| 5371 | } |
| 5372 | |
| 5373 | if ( !irq_test(info->port_array[0]) || |
| 5374 | !irq_test(info->port_array[1]) || |
| 5375 | (info->port_count == 4 && !irq_test(info->port_array[2])) || |
| 5376 | (info->port_count == 4 && !irq_test(info->port_array[3]))) { |
| 5377 | printk( "%s(%d):Interrupt test failure for device %s IRQ=%d\n", |
| 5378 | __FILE__,__LINE__,info->device_name, (unsigned short)(info->irq_level) ); |
| 5379 | return -ENODEV; |
| 5380 | } |
| 5381 | |
| 5382 | if (!loopback_test(info->port_array[0]) || |
| 5383 | !loopback_test(info->port_array[1]) || |
| 5384 | (info->port_count == 4 && !loopback_test(info->port_array[2])) || |
| 5385 | (info->port_count == 4 && !loopback_test(info->port_array[3]))) { |
| 5386 | printk( "%s(%d):DMA test failure for device %s\n", |
| 5387 | __FILE__,__LINE__,info->device_name); |
| 5388 | return -ENODEV; |
| 5389 | } |
| 5390 | |
| 5391 | if ( debug_level >= DEBUG_LEVEL_INFO ) |
| 5392 | printk( "%s(%d):device %s passed diagnostics\n", |
| 5393 | __FILE__,__LINE__,info->device_name ); |
| 5394 | |
| 5395 | info->port_array[0]->init_error = 0; |
| 5396 | info->port_array[1]->init_error = 0; |
| 5397 | if ( info->port_count > 2 ) { |
| 5398 | info->port_array[2]->init_error = 0; |
| 5399 | info->port_array[3]->init_error = 0; |
| 5400 | } |
| 5401 | |
| 5402 | return 0; |
| 5403 | } |
| 5404 | |
| 5405 | /* Test the shared memory on a PCI adapter. |
| 5406 | */ |
| 5407 | int memory_test(SLMP_INFO *info) |
| 5408 | { |
| 5409 | static unsigned long testval[] = { 0x0, 0x55555555, 0xaaaaaaaa, |
| 5410 | 0x66666666, 0x99999999, 0xffffffff, 0x12345678 }; |
Tobias Klauser | fe97107 | 2006-01-09 20:54:02 -0800 | [diff] [blame] | 5411 | unsigned long count = ARRAY_SIZE(testval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5412 | unsigned long i; |
| 5413 | unsigned long limit = SCA_MEM_SIZE/sizeof(unsigned long); |
| 5414 | unsigned long * addr = (unsigned long *)info->memory_base; |
| 5415 | |
| 5416 | /* Test data lines with test pattern at one location. */ |
| 5417 | |
| 5418 | for ( i = 0 ; i < count ; i++ ) { |
| 5419 | *addr = testval[i]; |
| 5420 | if ( *addr != testval[i] ) |
| 5421 | return FALSE; |
| 5422 | } |
| 5423 | |
| 5424 | /* Test address lines with incrementing pattern over */ |
| 5425 | /* entire address range. */ |
| 5426 | |
| 5427 | for ( i = 0 ; i < limit ; i++ ) { |
| 5428 | *addr = i * 4; |
| 5429 | addr++; |
| 5430 | } |
| 5431 | |
| 5432 | addr = (unsigned long *)info->memory_base; |
| 5433 | |
| 5434 | for ( i = 0 ; i < limit ; i++ ) { |
| 5435 | if ( *addr != i * 4 ) |
| 5436 | return FALSE; |
| 5437 | addr++; |
| 5438 | } |
| 5439 | |
| 5440 | memset( info->memory_base, 0, SCA_MEM_SIZE ); |
| 5441 | return TRUE; |
| 5442 | } |
| 5443 | |
| 5444 | /* Load data into PCI adapter shared memory. |
| 5445 | * |
| 5446 | * The PCI9050 releases control of the local bus |
| 5447 | * after completing the current read or write operation. |
| 5448 | * |
| 5449 | * While the PCI9050 write FIFO not empty, the |
| 5450 | * PCI9050 treats all of the writes as a single transaction |
| 5451 | * and does not release the bus. This causes DMA latency problems |
| 5452 | * at high speeds when copying large data blocks to the shared memory. |
| 5453 | * |
| 5454 | * This function breaks a write into multiple transations by |
| 5455 | * interleaving a read which flushes the write FIFO and 'completes' |
| 5456 | * the write transation. This allows any pending DMA request to gain control |
| 5457 | * of the local bus in a timely fasion. |
| 5458 | */ |
| 5459 | void load_pci_memory(SLMP_INFO *info, char* dest, const char* src, unsigned short count) |
| 5460 | { |
| 5461 | /* A load interval of 16 allows for 4 32-bit writes at */ |
| 5462 | /* 136ns each for a maximum latency of 542ns on the local bus.*/ |
| 5463 | |
| 5464 | unsigned short interval = count / sca_pci_load_interval; |
| 5465 | unsigned short i; |
| 5466 | |
| 5467 | for ( i = 0 ; i < interval ; i++ ) |
| 5468 | { |
| 5469 | memcpy(dest, src, sca_pci_load_interval); |
| 5470 | read_status_reg(info); |
| 5471 | dest += sca_pci_load_interval; |
| 5472 | src += sca_pci_load_interval; |
| 5473 | } |
| 5474 | |
| 5475 | memcpy(dest, src, count % sca_pci_load_interval); |
| 5476 | } |
| 5477 | |
| 5478 | void trace_block(SLMP_INFO *info,const char* data, int count, int xmit) |
| 5479 | { |
| 5480 | int i; |
| 5481 | int linecount; |
| 5482 | if (xmit) |
| 5483 | printk("%s tx data:\n",info->device_name); |
| 5484 | else |
| 5485 | printk("%s rx data:\n",info->device_name); |
| 5486 | |
| 5487 | while(count) { |
| 5488 | if (count > 16) |
| 5489 | linecount = 16; |
| 5490 | else |
| 5491 | linecount = count; |
| 5492 | |
| 5493 | for(i=0;i<linecount;i++) |
| 5494 | printk("%02X ",(unsigned char)data[i]); |
| 5495 | for(;i<17;i++) |
| 5496 | printk(" "); |
| 5497 | for(i=0;i<linecount;i++) { |
| 5498 | if (data[i]>=040 && data[i]<=0176) |
| 5499 | printk("%c",data[i]); |
| 5500 | else |
| 5501 | printk("."); |
| 5502 | } |
| 5503 | printk("\n"); |
| 5504 | |
| 5505 | data += linecount; |
| 5506 | count -= linecount; |
| 5507 | } |
| 5508 | } /* end of trace_block() */ |
| 5509 | |
| 5510 | /* called when HDLC frame times out |
| 5511 | * update stats and do tx completion processing |
| 5512 | */ |
| 5513 | void tx_timeout(unsigned long context) |
| 5514 | { |
| 5515 | SLMP_INFO *info = (SLMP_INFO*)context; |
| 5516 | unsigned long flags; |
| 5517 | |
| 5518 | if ( debug_level >= DEBUG_LEVEL_INFO ) |
| 5519 | printk( "%s(%d):%s tx_timeout()\n", |
| 5520 | __FILE__,__LINE__,info->device_name); |
| 5521 | if(info->tx_active && info->params.mode == MGSL_MODE_HDLC) { |
| 5522 | info->icount.txtimeout++; |
| 5523 | } |
| 5524 | spin_lock_irqsave(&info->lock,flags); |
| 5525 | info->tx_active = 0; |
| 5526 | info->tx_count = info->tx_put = info->tx_get = 0; |
| 5527 | |
| 5528 | spin_unlock_irqrestore(&info->lock,flags); |
| 5529 | |
| 5530 | #ifdef CONFIG_HDLC |
| 5531 | if (info->netcount) |
| 5532 | hdlcdev_tx_done(info); |
| 5533 | else |
| 5534 | #endif |
| 5535 | bh_transmit(info); |
| 5536 | } |
| 5537 | |
| 5538 | /* called to periodically check the DSR/RI modem signal input status |
| 5539 | */ |
| 5540 | void status_timeout(unsigned long context) |
| 5541 | { |
| 5542 | u16 status = 0; |
| 5543 | SLMP_INFO *info = (SLMP_INFO*)context; |
| 5544 | unsigned long flags; |
| 5545 | unsigned char delta; |
| 5546 | |
| 5547 | |
| 5548 | spin_lock_irqsave(&info->lock,flags); |
| 5549 | get_signals(info); |
| 5550 | spin_unlock_irqrestore(&info->lock,flags); |
| 5551 | |
| 5552 | /* check for DSR/RI state change */ |
| 5553 | |
| 5554 | delta = info->old_signals ^ info->serial_signals; |
| 5555 | info->old_signals = info->serial_signals; |
| 5556 | |
| 5557 | if (delta & SerialSignal_DSR) |
| 5558 | status |= MISCSTATUS_DSR_LATCHED|(info->serial_signals&SerialSignal_DSR); |
| 5559 | |
| 5560 | if (delta & SerialSignal_RI) |
| 5561 | status |= MISCSTATUS_RI_LATCHED|(info->serial_signals&SerialSignal_RI); |
| 5562 | |
| 5563 | if (delta & SerialSignal_DCD) |
| 5564 | status |= MISCSTATUS_DCD_LATCHED|(info->serial_signals&SerialSignal_DCD); |
| 5565 | |
| 5566 | if (delta & SerialSignal_CTS) |
| 5567 | status |= MISCSTATUS_CTS_LATCHED|(info->serial_signals&SerialSignal_CTS); |
| 5568 | |
| 5569 | if (status) |
| 5570 | isr_io_pin(info,status); |
| 5571 | |
| 5572 | info->status_timer.data = (unsigned long)info; |
| 5573 | info->status_timer.function = status_timeout; |
| 5574 | info->status_timer.expires = jiffies + msecs_to_jiffies(10); |
| 5575 | add_timer(&info->status_timer); |
| 5576 | } |
| 5577 | |
| 5578 | |
| 5579 | /* Register Access Routines - |
| 5580 | * All registers are memory mapped |
| 5581 | */ |
| 5582 | #define CALC_REGADDR() \ |
| 5583 | unsigned char * RegAddr = (unsigned char*)(info->sca_base + Addr); \ |
| 5584 | if (info->port_num > 1) \ |
| 5585 | RegAddr += 256; /* port 0-1 SCA0, 2-3 SCA1 */ \ |
| 5586 | if ( info->port_num & 1) { \ |
| 5587 | if (Addr > 0x7f) \ |
| 5588 | RegAddr += 0x40; /* DMA access */ \ |
| 5589 | else if (Addr > 0x1f && Addr < 0x60) \ |
| 5590 | RegAddr += 0x20; /* MSCI access */ \ |
| 5591 | } |
| 5592 | |
| 5593 | |
| 5594 | unsigned char read_reg(SLMP_INFO * info, unsigned char Addr) |
| 5595 | { |
| 5596 | CALC_REGADDR(); |
| 5597 | return *RegAddr; |
| 5598 | } |
| 5599 | void write_reg(SLMP_INFO * info, unsigned char Addr, unsigned char Value) |
| 5600 | { |
| 5601 | CALC_REGADDR(); |
| 5602 | *RegAddr = Value; |
| 5603 | } |
| 5604 | |
| 5605 | u16 read_reg16(SLMP_INFO * info, unsigned char Addr) |
| 5606 | { |
| 5607 | CALC_REGADDR(); |
| 5608 | return *((u16 *)RegAddr); |
| 5609 | } |
| 5610 | |
| 5611 | void write_reg16(SLMP_INFO * info, unsigned char Addr, u16 Value) |
| 5612 | { |
| 5613 | CALC_REGADDR(); |
| 5614 | *((u16 *)RegAddr) = Value; |
| 5615 | } |
| 5616 | |
| 5617 | unsigned char read_status_reg(SLMP_INFO * info) |
| 5618 | { |
| 5619 | unsigned char *RegAddr = (unsigned char *)info->statctrl_base; |
| 5620 | return *RegAddr; |
| 5621 | } |
| 5622 | |
| 5623 | void write_control_reg(SLMP_INFO * info) |
| 5624 | { |
| 5625 | unsigned char *RegAddr = (unsigned char *)info->statctrl_base; |
| 5626 | *RegAddr = info->port_array[0]->ctrlreg_value; |
| 5627 | } |
| 5628 | |
| 5629 | |
| 5630 | static int __devinit synclinkmp_init_one (struct pci_dev *dev, |
| 5631 | const struct pci_device_id *ent) |
| 5632 | { |
| 5633 | if (pci_enable_device(dev)) { |
| 5634 | printk("error enabling pci device %p\n", dev); |
| 5635 | return -EIO; |
| 5636 | } |
| 5637 | device_init( ++synclinkmp_adapter_count, dev ); |
| 5638 | return 0; |
| 5639 | } |
| 5640 | |
| 5641 | static void __devexit synclinkmp_remove_one (struct pci_dev *dev) |
| 5642 | { |
| 5643 | } |