Frank Seidel | 20fd1e3 | 2007-11-09 14:49:23 +0100 | [diff] [blame] | 1 | /* |
| 2 | * nozomi.c -- HSDPA driver Broadband Wireless Data Card - Globe Trotter |
| 3 | * |
| 4 | * Written by: Ulf Jakobsson, |
Frank Seidel | e9ed537 | 2008-01-25 21:13:24 +0100 | [diff] [blame] | 5 | * Jan Ã…kerfeldt, |
Frank Seidel | 20fd1e3 | 2007-11-09 14:49:23 +0100 | [diff] [blame] | 6 | * Stefan Thomasson, |
| 7 | * |
| 8 | * Maintained by: Paul Hardwick (p.hardwick@option.com) |
| 9 | * |
| 10 | * Patches: |
| 11 | * Locking code changes for Vodafone by Sphere Systems Ltd, |
| 12 | * Andrew Bird (ajb@spheresystems.co.uk ) |
| 13 | * & Phil Sanderson |
| 14 | * |
| 15 | * Source has been ported from an implementation made by Filip Aben @ Option |
| 16 | * |
| 17 | * -------------------------------------------------------------------------- |
| 18 | * |
| 19 | * Copyright (c) 2005,2006 Option Wireless Sweden AB |
| 20 | * Copyright (c) 2006 Sphere Systems Ltd |
| 21 | * Copyright (c) 2006 Option Wireless n/v |
| 22 | * All rights Reserved. |
| 23 | * |
| 24 | * This program is free software; you can redistribute it and/or modify |
| 25 | * it under the terms of the GNU General Public License as published by |
| 26 | * the Free Software Foundation; either version 2 of the License, or |
| 27 | * (at your option) any later version. |
| 28 | * |
| 29 | * This program is distributed in the hope that it will be useful, |
| 30 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 31 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 32 | * GNU General Public License for more details. |
| 33 | * |
| 34 | * You should have received a copy of the GNU General Public License |
| 35 | * along with this program; if not, write to the Free Software |
| 36 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 37 | * |
| 38 | * -------------------------------------------------------------------------- |
| 39 | */ |
| 40 | |
Frank Seidel | 20fd1e3 | 2007-11-09 14:49:23 +0100 | [diff] [blame] | 41 | /* Enable this to have a lot of debug printouts */ |
| 42 | #define DEBUG |
| 43 | |
| 44 | #include <linux/kernel.h> |
| 45 | #include <linux/module.h> |
| 46 | #include <linux/pci.h> |
| 47 | #include <linux/ioport.h> |
| 48 | #include <linux/tty.h> |
| 49 | #include <linux/tty_driver.h> |
| 50 | #include <linux/tty_flip.h> |
| 51 | #include <linux/serial.h> |
| 52 | #include <linux/interrupt.h> |
| 53 | #include <linux/kmod.h> |
| 54 | #include <linux/init.h> |
| 55 | #include <linux/kfifo.h> |
| 56 | #include <linux/uaccess.h> |
| 57 | #include <asm/byteorder.h> |
| 58 | |
| 59 | #include <linux/delay.h> |
| 60 | |
| 61 | |
| 62 | #define VERSION_STRING DRIVER_DESC " 2.1d (build date: " \ |
| 63 | __DATE__ " " __TIME__ ")" |
| 64 | |
| 65 | /* Macros definitions */ |
| 66 | |
| 67 | /* Default debug printout level */ |
| 68 | #define NOZOMI_DEBUG_LEVEL 0x00 |
| 69 | |
| 70 | #define P_BUF_SIZE 128 |
| 71 | #define NFO(_err_flag_, args...) \ |
| 72 | do { \ |
| 73 | char tmp[P_BUF_SIZE]; \ |
| 74 | snprintf(tmp, sizeof(tmp), ##args); \ |
| 75 | printk(_err_flag_ "[%d] %s(): %s\n", __LINE__, \ |
Harvey Harrison | bf9d892 | 2008-04-30 00:55:10 -0700 | [diff] [blame^] | 76 | __func__, tmp); \ |
Frank Seidel | 20fd1e3 | 2007-11-09 14:49:23 +0100 | [diff] [blame] | 77 | } while (0) |
| 78 | |
| 79 | #define DBG1(args...) D_(0x01, ##args) |
| 80 | #define DBG2(args...) D_(0x02, ##args) |
| 81 | #define DBG3(args...) D_(0x04, ##args) |
| 82 | #define DBG4(args...) D_(0x08, ##args) |
| 83 | #define DBG5(args...) D_(0x10, ##args) |
| 84 | #define DBG6(args...) D_(0x20, ##args) |
| 85 | #define DBG7(args...) D_(0x40, ##args) |
| 86 | #define DBG8(args...) D_(0x80, ##args) |
| 87 | |
| 88 | #ifdef DEBUG |
| 89 | /* Do we need this settable at runtime? */ |
| 90 | static int debug = NOZOMI_DEBUG_LEVEL; |
| 91 | |
Frank Seidel | e9ed537 | 2008-01-25 21:13:24 +0100 | [diff] [blame] | 92 | #define D(lvl, args...) do \ |
| 93 | {if (lvl & debug) NFO(KERN_DEBUG, ##args); } \ |
| 94 | while (0) |
Frank Seidel | 20fd1e3 | 2007-11-09 14:49:23 +0100 | [diff] [blame] | 95 | #define D_(lvl, args...) D(lvl, ##args) |
| 96 | |
| 97 | /* These printouts are always printed */ |
| 98 | |
| 99 | #else |
| 100 | static int debug; |
| 101 | #define D_(lvl, args...) |
| 102 | #endif |
| 103 | |
| 104 | /* TODO: rewrite to optimize macros... */ |
| 105 | |
| 106 | #define TMP_BUF_MAX 256 |
| 107 | |
| 108 | #define DUMP(buf__,len__) \ |
| 109 | do { \ |
| 110 | char tbuf[TMP_BUF_MAX] = {0};\ |
| 111 | if (len__ > 1) {\ |
| 112 | snprintf(tbuf, len__ > TMP_BUF_MAX ? TMP_BUF_MAX : len__, "%s", buf__);\ |
| 113 | if (tbuf[len__-2] == '\r') {\ |
| 114 | tbuf[len__-2] = 'r';\ |
| 115 | } \ |
| 116 | DBG1("SENDING: '%s' (%d+n)", tbuf, len__);\ |
| 117 | } else {\ |
| 118 | DBG1("SENDING: '%s' (%d)", tbuf, len__);\ |
| 119 | } \ |
| 120 | } while (0) |
| 121 | |
| 122 | /* Defines */ |
| 123 | #define NOZOMI_NAME "nozomi" |
| 124 | #define NOZOMI_NAME_TTY "nozomi_tty" |
| 125 | #define DRIVER_DESC "Nozomi driver" |
| 126 | |
| 127 | #define NTTY_TTY_MAXMINORS 256 |
| 128 | #define NTTY_FIFO_BUFFER_SIZE 8192 |
| 129 | |
| 130 | /* Must be power of 2 */ |
| 131 | #define FIFO_BUFFER_SIZE_UL 8192 |
| 132 | |
| 133 | /* Size of tmp send buffer to card */ |
| 134 | #define SEND_BUF_MAX 1024 |
| 135 | #define RECEIVE_BUF_MAX 4 |
| 136 | |
| 137 | |
| 138 | /* Define all types of vendors and devices to support */ |
| 139 | #define VENDOR1 0x1931 /* Vendor Option */ |
| 140 | #define DEVICE1 0x000c /* HSDPA card */ |
| 141 | |
| 142 | #define R_IIR 0x0000 /* Interrupt Identity Register */ |
| 143 | #define R_FCR 0x0000 /* Flow Control Register */ |
| 144 | #define R_IER 0x0004 /* Interrupt Enable Register */ |
| 145 | |
| 146 | #define CONFIG_MAGIC 0xEFEFFEFE |
| 147 | #define TOGGLE_VALID 0x0000 |
| 148 | |
| 149 | /* Definition of interrupt tokens */ |
| 150 | #define MDM_DL1 0x0001 |
| 151 | #define MDM_UL1 0x0002 |
| 152 | #define MDM_DL2 0x0004 |
| 153 | #define MDM_UL2 0x0008 |
| 154 | #define DIAG_DL1 0x0010 |
| 155 | #define DIAG_DL2 0x0020 |
| 156 | #define DIAG_UL 0x0040 |
| 157 | #define APP1_DL 0x0080 |
| 158 | #define APP1_UL 0x0100 |
| 159 | #define APP2_DL 0x0200 |
| 160 | #define APP2_UL 0x0400 |
| 161 | #define CTRL_DL 0x0800 |
| 162 | #define CTRL_UL 0x1000 |
| 163 | #define RESET 0x8000 |
| 164 | |
| 165 | #define MDM_DL (MDM_DL1 | MDM_DL2) |
| 166 | #define MDM_UL (MDM_UL1 | MDM_UL2) |
| 167 | #define DIAG_DL (DIAG_DL1 | DIAG_DL2) |
| 168 | |
| 169 | /* modem signal definition */ |
| 170 | #define CTRL_DSR 0x0001 |
| 171 | #define CTRL_DCD 0x0002 |
| 172 | #define CTRL_RI 0x0004 |
| 173 | #define CTRL_CTS 0x0008 |
| 174 | |
| 175 | #define CTRL_DTR 0x0001 |
| 176 | #define CTRL_RTS 0x0002 |
| 177 | |
| 178 | #define MAX_PORT 4 |
| 179 | #define NOZOMI_MAX_PORTS 5 |
| 180 | #define NOZOMI_MAX_CARDS (NTTY_TTY_MAXMINORS / MAX_PORT) |
| 181 | |
| 182 | /* Type definitions */ |
| 183 | |
| 184 | /* |
| 185 | * There are two types of nozomi cards, |
| 186 | * one with 2048 memory and with 8192 memory |
| 187 | */ |
| 188 | enum card_type { |
| 189 | F32_2 = 2048, /* 512 bytes downlink + uplink * 2 -> 2048 */ |
| 190 | F32_8 = 8192, /* 3072 bytes downl. + 1024 bytes uplink * 2 -> 8192 */ |
| 191 | }; |
| 192 | |
Frank Seidel | 661b4e8 | 2008-03-06 21:45:57 +0100 | [diff] [blame] | 193 | /* Initialization states a card can be in */ |
| 194 | enum card_state { |
| 195 | NOZOMI_STATE_UKNOWN = 0, |
| 196 | NOZOMI_STATE_ENABLED = 1, /* pci device enabled */ |
| 197 | NOZOMI_STATE_ALLOCATED = 2, /* config setup done */ |
| 198 | NOZOMI_STATE_READY = 3, /* flowcontrols received */ |
| 199 | }; |
| 200 | |
Frank Seidel | 20fd1e3 | 2007-11-09 14:49:23 +0100 | [diff] [blame] | 201 | /* Two different toggle channels exist */ |
| 202 | enum channel_type { |
| 203 | CH_A = 0, |
| 204 | CH_B = 1, |
| 205 | }; |
| 206 | |
| 207 | /* Port definition for the card regarding flow control */ |
| 208 | enum ctrl_port_type { |
| 209 | CTRL_CMD = 0, |
| 210 | CTRL_MDM = 1, |
| 211 | CTRL_DIAG = 2, |
| 212 | CTRL_APP1 = 3, |
| 213 | CTRL_APP2 = 4, |
| 214 | CTRL_ERROR = -1, |
| 215 | }; |
| 216 | |
| 217 | /* Ports that the nozomi has */ |
| 218 | enum port_type { |
| 219 | PORT_MDM = 0, |
| 220 | PORT_DIAG = 1, |
| 221 | PORT_APP1 = 2, |
| 222 | PORT_APP2 = 3, |
| 223 | PORT_CTRL = 4, |
| 224 | PORT_ERROR = -1, |
| 225 | }; |
| 226 | |
| 227 | #ifdef __BIG_ENDIAN |
| 228 | /* Big endian */ |
| 229 | |
| 230 | struct toggles { |
Frank Seidel | e9ed537 | 2008-01-25 21:13:24 +0100 | [diff] [blame] | 231 | unsigned int enabled:5; /* |
Frank Seidel | 20fd1e3 | 2007-11-09 14:49:23 +0100 | [diff] [blame] | 232 | * Toggle fields are valid if enabled is 0, |
| 233 | * else A-channels must always be used. |
| 234 | */ |
Frank Seidel | e9ed537 | 2008-01-25 21:13:24 +0100 | [diff] [blame] | 235 | unsigned int diag_dl:1; |
| 236 | unsigned int mdm_dl:1; |
| 237 | unsigned int mdm_ul:1; |
Frank Seidel | 20fd1e3 | 2007-11-09 14:49:23 +0100 | [diff] [blame] | 238 | } __attribute__ ((packed)); |
| 239 | |
| 240 | /* Configuration table to read at startup of card */ |
| 241 | /* Is for now only needed during initialization phase */ |
| 242 | struct config_table { |
| 243 | u32 signature; |
| 244 | u16 product_information; |
| 245 | u16 version; |
| 246 | u8 pad3[3]; |
| 247 | struct toggles toggle; |
| 248 | u8 pad1[4]; |
| 249 | u16 dl_mdm_len1; /* |
| 250 | * If this is 64, it can hold |
| 251 | * 60 bytes + 4 that is length field |
| 252 | */ |
| 253 | u16 dl_start; |
| 254 | |
| 255 | u16 dl_diag_len1; |
| 256 | u16 dl_mdm_len2; /* |
| 257 | * If this is 64, it can hold |
| 258 | * 60 bytes + 4 that is length field |
| 259 | */ |
| 260 | u16 dl_app1_len; |
| 261 | |
| 262 | u16 dl_diag_len2; |
| 263 | u16 dl_ctrl_len; |
| 264 | u16 dl_app2_len; |
| 265 | u8 pad2[16]; |
| 266 | u16 ul_mdm_len1; |
| 267 | u16 ul_start; |
| 268 | u16 ul_diag_len; |
| 269 | u16 ul_mdm_len2; |
| 270 | u16 ul_app1_len; |
| 271 | u16 ul_app2_len; |
| 272 | u16 ul_ctrl_len; |
| 273 | } __attribute__ ((packed)); |
| 274 | |
| 275 | /* This stores all control downlink flags */ |
| 276 | struct ctrl_dl { |
| 277 | u8 port; |
Frank Seidel | e9ed537 | 2008-01-25 21:13:24 +0100 | [diff] [blame] | 278 | unsigned int reserved:4; |
| 279 | unsigned int CTS:1; |
| 280 | unsigned int RI:1; |
| 281 | unsigned int DCD:1; |
| 282 | unsigned int DSR:1; |
Frank Seidel | 20fd1e3 | 2007-11-09 14:49:23 +0100 | [diff] [blame] | 283 | } __attribute__ ((packed)); |
| 284 | |
| 285 | /* This stores all control uplink flags */ |
| 286 | struct ctrl_ul { |
| 287 | u8 port; |
Frank Seidel | e9ed537 | 2008-01-25 21:13:24 +0100 | [diff] [blame] | 288 | unsigned int reserved:6; |
| 289 | unsigned int RTS:1; |
| 290 | unsigned int DTR:1; |
Frank Seidel | 20fd1e3 | 2007-11-09 14:49:23 +0100 | [diff] [blame] | 291 | } __attribute__ ((packed)); |
| 292 | |
| 293 | #else |
| 294 | /* Little endian */ |
| 295 | |
| 296 | /* This represents the toggle information */ |
| 297 | struct toggles { |
Frank Seidel | e9ed537 | 2008-01-25 21:13:24 +0100 | [diff] [blame] | 298 | unsigned int mdm_ul:1; |
| 299 | unsigned int mdm_dl:1; |
| 300 | unsigned int diag_dl:1; |
| 301 | unsigned int enabled:5; /* |
Frank Seidel | 20fd1e3 | 2007-11-09 14:49:23 +0100 | [diff] [blame] | 302 | * Toggle fields are valid if enabled is 0, |
| 303 | * else A-channels must always be used. |
| 304 | */ |
| 305 | } __attribute__ ((packed)); |
| 306 | |
| 307 | /* Configuration table to read at startup of card */ |
| 308 | struct config_table { |
| 309 | u32 signature; |
| 310 | u16 version; |
| 311 | u16 product_information; |
| 312 | struct toggles toggle; |
| 313 | u8 pad1[7]; |
| 314 | u16 dl_start; |
| 315 | u16 dl_mdm_len1; /* |
| 316 | * If this is 64, it can hold |
| 317 | * 60 bytes + 4 that is length field |
| 318 | */ |
| 319 | u16 dl_mdm_len2; |
| 320 | u16 dl_diag_len1; |
| 321 | u16 dl_diag_len2; |
| 322 | u16 dl_app1_len; |
| 323 | u16 dl_app2_len; |
| 324 | u16 dl_ctrl_len; |
| 325 | u8 pad2[16]; |
| 326 | u16 ul_start; |
| 327 | u16 ul_mdm_len2; |
| 328 | u16 ul_mdm_len1; |
| 329 | u16 ul_diag_len; |
| 330 | u16 ul_app1_len; |
| 331 | u16 ul_app2_len; |
| 332 | u16 ul_ctrl_len; |
| 333 | } __attribute__ ((packed)); |
| 334 | |
| 335 | /* This stores all control downlink flags */ |
| 336 | struct ctrl_dl { |
Frank Seidel | e9ed537 | 2008-01-25 21:13:24 +0100 | [diff] [blame] | 337 | unsigned int DSR:1; |
| 338 | unsigned int DCD:1; |
| 339 | unsigned int RI:1; |
| 340 | unsigned int CTS:1; |
| 341 | unsigned int reserverd:4; |
Frank Seidel | 20fd1e3 | 2007-11-09 14:49:23 +0100 | [diff] [blame] | 342 | u8 port; |
| 343 | } __attribute__ ((packed)); |
| 344 | |
| 345 | /* This stores all control uplink flags */ |
| 346 | struct ctrl_ul { |
Frank Seidel | e9ed537 | 2008-01-25 21:13:24 +0100 | [diff] [blame] | 347 | unsigned int DTR:1; |
| 348 | unsigned int RTS:1; |
| 349 | unsigned int reserved:6; |
Frank Seidel | 20fd1e3 | 2007-11-09 14:49:23 +0100 | [diff] [blame] | 350 | u8 port; |
| 351 | } __attribute__ ((packed)); |
| 352 | #endif |
| 353 | |
| 354 | /* This holds all information that is needed regarding a port */ |
| 355 | struct port { |
| 356 | u8 update_flow_control; |
| 357 | struct ctrl_ul ctrl_ul; |
| 358 | struct ctrl_dl ctrl_dl; |
| 359 | struct kfifo *fifo_ul; |
| 360 | void __iomem *dl_addr[2]; |
| 361 | u32 dl_size[2]; |
| 362 | u8 toggle_dl; |
| 363 | void __iomem *ul_addr[2]; |
| 364 | u32 ul_size[2]; |
| 365 | u8 toggle_ul; |
| 366 | u16 token_dl; |
| 367 | |
| 368 | struct tty_struct *tty; |
| 369 | int tty_open_count; |
| 370 | /* mutex to ensure one access patch to this port */ |
| 371 | struct mutex tty_sem; |
| 372 | wait_queue_head_t tty_wait; |
| 373 | struct async_icount tty_icount; |
| 374 | }; |
| 375 | |
| 376 | /* Private data one for each card in the system */ |
| 377 | struct nozomi { |
| 378 | void __iomem *base_addr; |
| 379 | unsigned long flip; |
| 380 | |
| 381 | /* Pointers to registers */ |
| 382 | void __iomem *reg_iir; |
| 383 | void __iomem *reg_fcr; |
| 384 | void __iomem *reg_ier; |
| 385 | |
| 386 | u16 last_ier; |
| 387 | enum card_type card_type; |
| 388 | struct config_table config_table; /* Configuration table */ |
| 389 | struct pci_dev *pdev; |
| 390 | struct port port[NOZOMI_MAX_PORTS]; |
| 391 | u8 *send_buf; |
| 392 | |
| 393 | spinlock_t spin_mutex; /* secures access to registers and tty */ |
| 394 | |
| 395 | unsigned int index_start; |
Frank Seidel | 661b4e8 | 2008-03-06 21:45:57 +0100 | [diff] [blame] | 396 | enum card_state state; |
Frank Seidel | 20fd1e3 | 2007-11-09 14:49:23 +0100 | [diff] [blame] | 397 | u32 open_ttys; |
| 398 | }; |
| 399 | |
| 400 | /* This is a data packet that is read or written to/from card */ |
| 401 | struct buffer { |
| 402 | u32 size; /* size is the length of the data buffer */ |
| 403 | u8 *data; |
| 404 | } __attribute__ ((packed)); |
| 405 | |
| 406 | /* Global variables */ |
Frank Seidel | 18bbe0c2 | 2008-02-01 09:14:05 +0100 | [diff] [blame] | 407 | static const struct pci_device_id nozomi_pci_tbl[] __devinitconst = { |
Frank Seidel | 20fd1e3 | 2007-11-09 14:49:23 +0100 | [diff] [blame] | 408 | {PCI_DEVICE(VENDOR1, DEVICE1)}, |
| 409 | {}, |
| 410 | }; |
| 411 | |
| 412 | MODULE_DEVICE_TABLE(pci, nozomi_pci_tbl); |
| 413 | |
| 414 | static struct nozomi *ndevs[NOZOMI_MAX_CARDS]; |
| 415 | static struct tty_driver *ntty_driver; |
| 416 | |
| 417 | /* |
| 418 | * find card by tty_index |
| 419 | */ |
| 420 | static inline struct nozomi *get_dc_by_tty(const struct tty_struct *tty) |
| 421 | { |
| 422 | return tty ? ndevs[tty->index / MAX_PORT] : NULL; |
| 423 | } |
| 424 | |
| 425 | static inline struct port *get_port_by_tty(const struct tty_struct *tty) |
| 426 | { |
| 427 | struct nozomi *ndev = get_dc_by_tty(tty); |
| 428 | return ndev ? &ndev->port[tty->index % MAX_PORT] : NULL; |
| 429 | } |
| 430 | |
| 431 | /* |
| 432 | * TODO: |
| 433 | * -Optimize |
| 434 | * -Rewrite cleaner |
| 435 | */ |
| 436 | |
| 437 | static void read_mem32(u32 *buf, const void __iomem *mem_addr_start, |
| 438 | u32 size_bytes) |
| 439 | { |
| 440 | u32 i = 0; |
Al Viro | 782a6de | 2008-03-29 03:09:08 +0000 | [diff] [blame] | 441 | const u32 __iomem *ptr = mem_addr_start; |
Frank Seidel | 20fd1e3 | 2007-11-09 14:49:23 +0100 | [diff] [blame] | 442 | u16 *buf16; |
| 443 | |
| 444 | if (unlikely(!ptr || !buf)) |
| 445 | goto out; |
| 446 | |
| 447 | /* shortcut for extremely often used cases */ |
| 448 | switch (size_bytes) { |
| 449 | case 2: /* 2 bytes */ |
| 450 | buf16 = (u16 *) buf; |
Al Viro | 782a6de | 2008-03-29 03:09:08 +0000 | [diff] [blame] | 451 | *buf16 = __le16_to_cpu(readw(ptr)); |
Frank Seidel | 20fd1e3 | 2007-11-09 14:49:23 +0100 | [diff] [blame] | 452 | goto out; |
| 453 | break; |
| 454 | case 4: /* 4 bytes */ |
Al Viro | 782a6de | 2008-03-29 03:09:08 +0000 | [diff] [blame] | 455 | *(buf) = __le32_to_cpu(readl(ptr)); |
Frank Seidel | 20fd1e3 | 2007-11-09 14:49:23 +0100 | [diff] [blame] | 456 | goto out; |
| 457 | break; |
| 458 | } |
| 459 | |
| 460 | while (i < size_bytes) { |
| 461 | if (size_bytes - i == 2) { |
| 462 | /* Handle 2 bytes in the end */ |
| 463 | buf16 = (u16 *) buf; |
Al Viro | 782a6de | 2008-03-29 03:09:08 +0000 | [diff] [blame] | 464 | *(buf16) = __le16_to_cpu(readw(ptr)); |
Frank Seidel | 20fd1e3 | 2007-11-09 14:49:23 +0100 | [diff] [blame] | 465 | i += 2; |
| 466 | } else { |
| 467 | /* Read 4 bytes */ |
Al Viro | 782a6de | 2008-03-29 03:09:08 +0000 | [diff] [blame] | 468 | *(buf) = __le32_to_cpu(readl(ptr)); |
Frank Seidel | 20fd1e3 | 2007-11-09 14:49:23 +0100 | [diff] [blame] | 469 | i += 4; |
| 470 | } |
| 471 | buf++; |
| 472 | ptr++; |
| 473 | } |
| 474 | out: |
| 475 | return; |
| 476 | } |
| 477 | |
| 478 | /* |
| 479 | * TODO: |
| 480 | * -Optimize |
| 481 | * -Rewrite cleaner |
| 482 | */ |
Jan Engelhardt | 71e1b4a | 2008-02-01 09:13:53 +0100 | [diff] [blame] | 483 | static u32 write_mem32(void __iomem *mem_addr_start, const u32 *buf, |
Frank Seidel | 20fd1e3 | 2007-11-09 14:49:23 +0100 | [diff] [blame] | 484 | u32 size_bytes) |
| 485 | { |
| 486 | u32 i = 0; |
Al Viro | 782a6de | 2008-03-29 03:09:08 +0000 | [diff] [blame] | 487 | u32 __iomem *ptr = mem_addr_start; |
Jan Engelhardt | 71e1b4a | 2008-02-01 09:13:53 +0100 | [diff] [blame] | 488 | const u16 *buf16; |
Frank Seidel | 20fd1e3 | 2007-11-09 14:49:23 +0100 | [diff] [blame] | 489 | |
| 490 | if (unlikely(!ptr || !buf)) |
| 491 | return 0; |
| 492 | |
| 493 | /* shortcut for extremely often used cases */ |
| 494 | switch (size_bytes) { |
| 495 | case 2: /* 2 bytes */ |
Jan Engelhardt | 71e1b4a | 2008-02-01 09:13:53 +0100 | [diff] [blame] | 496 | buf16 = (const u16 *)buf; |
Al Viro | 782a6de | 2008-03-29 03:09:08 +0000 | [diff] [blame] | 497 | writew(__cpu_to_le16(*buf16), ptr); |
Frank Seidel | 20fd1e3 | 2007-11-09 14:49:23 +0100 | [diff] [blame] | 498 | return 2; |
| 499 | break; |
| 500 | case 1: /* |
| 501 | * also needs to write 4 bytes in this case |
| 502 | * so falling through.. |
| 503 | */ |
| 504 | case 4: /* 4 bytes */ |
Al Viro | 782a6de | 2008-03-29 03:09:08 +0000 | [diff] [blame] | 505 | writel(__cpu_to_le32(*buf), ptr); |
Frank Seidel | 20fd1e3 | 2007-11-09 14:49:23 +0100 | [diff] [blame] | 506 | return 4; |
| 507 | break; |
| 508 | } |
| 509 | |
| 510 | while (i < size_bytes) { |
| 511 | if (size_bytes - i == 2) { |
| 512 | /* 2 bytes */ |
Jan Engelhardt | 71e1b4a | 2008-02-01 09:13:53 +0100 | [diff] [blame] | 513 | buf16 = (const u16 *)buf; |
Al Viro | 782a6de | 2008-03-29 03:09:08 +0000 | [diff] [blame] | 514 | writew(__cpu_to_le16(*buf16), ptr); |
Frank Seidel | 20fd1e3 | 2007-11-09 14:49:23 +0100 | [diff] [blame] | 515 | i += 2; |
| 516 | } else { |
| 517 | /* 4 bytes */ |
Al Viro | 782a6de | 2008-03-29 03:09:08 +0000 | [diff] [blame] | 518 | writel(__cpu_to_le32(*buf), ptr); |
Frank Seidel | 20fd1e3 | 2007-11-09 14:49:23 +0100 | [diff] [blame] | 519 | i += 4; |
| 520 | } |
| 521 | buf++; |
| 522 | ptr++; |
| 523 | } |
| 524 | return i; |
| 525 | } |
| 526 | |
| 527 | /* Setup pointers to different channels and also setup buffer sizes. */ |
| 528 | static void setup_memory(struct nozomi *dc) |
| 529 | { |
| 530 | void __iomem *offset = dc->base_addr + dc->config_table.dl_start; |
| 531 | /* The length reported is including the length field of 4 bytes, |
| 532 | * hence subtract with 4. |
| 533 | */ |
| 534 | const u16 buff_offset = 4; |
| 535 | |
| 536 | /* Modem port dl configuration */ |
| 537 | dc->port[PORT_MDM].dl_addr[CH_A] = offset; |
| 538 | dc->port[PORT_MDM].dl_addr[CH_B] = |
| 539 | (offset += dc->config_table.dl_mdm_len1); |
| 540 | dc->port[PORT_MDM].dl_size[CH_A] = |
| 541 | dc->config_table.dl_mdm_len1 - buff_offset; |
| 542 | dc->port[PORT_MDM].dl_size[CH_B] = |
| 543 | dc->config_table.dl_mdm_len2 - buff_offset; |
| 544 | |
| 545 | /* Diag port dl configuration */ |
| 546 | dc->port[PORT_DIAG].dl_addr[CH_A] = |
| 547 | (offset += dc->config_table.dl_mdm_len2); |
| 548 | dc->port[PORT_DIAG].dl_size[CH_A] = |
| 549 | dc->config_table.dl_diag_len1 - buff_offset; |
| 550 | dc->port[PORT_DIAG].dl_addr[CH_B] = |
| 551 | (offset += dc->config_table.dl_diag_len1); |
| 552 | dc->port[PORT_DIAG].dl_size[CH_B] = |
| 553 | dc->config_table.dl_diag_len2 - buff_offset; |
| 554 | |
| 555 | /* App1 port dl configuration */ |
| 556 | dc->port[PORT_APP1].dl_addr[CH_A] = |
| 557 | (offset += dc->config_table.dl_diag_len2); |
| 558 | dc->port[PORT_APP1].dl_size[CH_A] = |
| 559 | dc->config_table.dl_app1_len - buff_offset; |
| 560 | |
| 561 | /* App2 port dl configuration */ |
| 562 | dc->port[PORT_APP2].dl_addr[CH_A] = |
| 563 | (offset += dc->config_table.dl_app1_len); |
| 564 | dc->port[PORT_APP2].dl_size[CH_A] = |
| 565 | dc->config_table.dl_app2_len - buff_offset; |
| 566 | |
| 567 | /* Ctrl dl configuration */ |
| 568 | dc->port[PORT_CTRL].dl_addr[CH_A] = |
| 569 | (offset += dc->config_table.dl_app2_len); |
| 570 | dc->port[PORT_CTRL].dl_size[CH_A] = |
| 571 | dc->config_table.dl_ctrl_len - buff_offset; |
| 572 | |
| 573 | offset = dc->base_addr + dc->config_table.ul_start; |
| 574 | |
| 575 | /* Modem Port ul configuration */ |
| 576 | dc->port[PORT_MDM].ul_addr[CH_A] = offset; |
| 577 | dc->port[PORT_MDM].ul_size[CH_A] = |
| 578 | dc->config_table.ul_mdm_len1 - buff_offset; |
| 579 | dc->port[PORT_MDM].ul_addr[CH_B] = |
| 580 | (offset += dc->config_table.ul_mdm_len1); |
| 581 | dc->port[PORT_MDM].ul_size[CH_B] = |
| 582 | dc->config_table.ul_mdm_len2 - buff_offset; |
| 583 | |
| 584 | /* Diag port ul configuration */ |
| 585 | dc->port[PORT_DIAG].ul_addr[CH_A] = |
| 586 | (offset += dc->config_table.ul_mdm_len2); |
| 587 | dc->port[PORT_DIAG].ul_size[CH_A] = |
| 588 | dc->config_table.ul_diag_len - buff_offset; |
| 589 | |
| 590 | /* App1 port ul configuration */ |
| 591 | dc->port[PORT_APP1].ul_addr[CH_A] = |
| 592 | (offset += dc->config_table.ul_diag_len); |
| 593 | dc->port[PORT_APP1].ul_size[CH_A] = |
| 594 | dc->config_table.ul_app1_len - buff_offset; |
| 595 | |
| 596 | /* App2 port ul configuration */ |
| 597 | dc->port[PORT_APP2].ul_addr[CH_A] = |
| 598 | (offset += dc->config_table.ul_app1_len); |
| 599 | dc->port[PORT_APP2].ul_size[CH_A] = |
| 600 | dc->config_table.ul_app2_len - buff_offset; |
| 601 | |
| 602 | /* Ctrl ul configuration */ |
| 603 | dc->port[PORT_CTRL].ul_addr[CH_A] = |
| 604 | (offset += dc->config_table.ul_app2_len); |
| 605 | dc->port[PORT_CTRL].ul_size[CH_A] = |
| 606 | dc->config_table.ul_ctrl_len - buff_offset; |
| 607 | } |
| 608 | |
| 609 | /* Dump config table under initalization phase */ |
| 610 | #ifdef DEBUG |
| 611 | static void dump_table(const struct nozomi *dc) |
| 612 | { |
| 613 | DBG3("signature: 0x%08X", dc->config_table.signature); |
| 614 | DBG3("version: 0x%04X", dc->config_table.version); |
| 615 | DBG3("product_information: 0x%04X", \ |
| 616 | dc->config_table.product_information); |
| 617 | DBG3("toggle enabled: %d", dc->config_table.toggle.enabled); |
| 618 | DBG3("toggle up_mdm: %d", dc->config_table.toggle.mdm_ul); |
| 619 | DBG3("toggle dl_mdm: %d", dc->config_table.toggle.mdm_dl); |
| 620 | DBG3("toggle dl_dbg: %d", dc->config_table.toggle.diag_dl); |
| 621 | |
| 622 | DBG3("dl_start: 0x%04X", dc->config_table.dl_start); |
| 623 | DBG3("dl_mdm_len0: 0x%04X, %d", dc->config_table.dl_mdm_len1, |
| 624 | dc->config_table.dl_mdm_len1); |
| 625 | DBG3("dl_mdm_len1: 0x%04X, %d", dc->config_table.dl_mdm_len2, |
| 626 | dc->config_table.dl_mdm_len2); |
| 627 | DBG3("dl_diag_len0: 0x%04X, %d", dc->config_table.dl_diag_len1, |
| 628 | dc->config_table.dl_diag_len1); |
| 629 | DBG3("dl_diag_len1: 0x%04X, %d", dc->config_table.dl_diag_len2, |
| 630 | dc->config_table.dl_diag_len2); |
| 631 | DBG3("dl_app1_len: 0x%04X, %d", dc->config_table.dl_app1_len, |
| 632 | dc->config_table.dl_app1_len); |
| 633 | DBG3("dl_app2_len: 0x%04X, %d", dc->config_table.dl_app2_len, |
| 634 | dc->config_table.dl_app2_len); |
| 635 | DBG3("dl_ctrl_len: 0x%04X, %d", dc->config_table.dl_ctrl_len, |
| 636 | dc->config_table.dl_ctrl_len); |
| 637 | DBG3("ul_start: 0x%04X, %d", dc->config_table.ul_start, |
| 638 | dc->config_table.ul_start); |
| 639 | DBG3("ul_mdm_len[0]: 0x%04X, %d", dc->config_table.ul_mdm_len1, |
| 640 | dc->config_table.ul_mdm_len1); |
| 641 | DBG3("ul_mdm_len[1]: 0x%04X, %d", dc->config_table.ul_mdm_len2, |
| 642 | dc->config_table.ul_mdm_len2); |
| 643 | DBG3("ul_diag_len: 0x%04X, %d", dc->config_table.ul_diag_len, |
| 644 | dc->config_table.ul_diag_len); |
| 645 | DBG3("ul_app1_len: 0x%04X, %d", dc->config_table.ul_app1_len, |
| 646 | dc->config_table.ul_app1_len); |
| 647 | DBG3("ul_app2_len: 0x%04X, %d", dc->config_table.ul_app2_len, |
| 648 | dc->config_table.ul_app2_len); |
| 649 | DBG3("ul_ctrl_len: 0x%04X, %d", dc->config_table.ul_ctrl_len, |
| 650 | dc->config_table.ul_ctrl_len); |
| 651 | } |
| 652 | #else |
Frank Seidel | e9ed537 | 2008-01-25 21:13:24 +0100 | [diff] [blame] | 653 | static inline void dump_table(const struct nozomi *dc) { } |
Frank Seidel | 20fd1e3 | 2007-11-09 14:49:23 +0100 | [diff] [blame] | 654 | #endif |
| 655 | |
| 656 | /* |
| 657 | * Read configuration table from card under intalization phase |
| 658 | * Returns 1 if ok, else 0 |
| 659 | */ |
| 660 | static int nozomi_read_config_table(struct nozomi *dc) |
| 661 | { |
| 662 | read_mem32((u32 *) &dc->config_table, dc->base_addr + 0, |
| 663 | sizeof(struct config_table)); |
| 664 | |
| 665 | if (dc->config_table.signature != CONFIG_MAGIC) { |
| 666 | dev_err(&dc->pdev->dev, "ConfigTable Bad! 0x%08X != 0x%08X\n", |
| 667 | dc->config_table.signature, CONFIG_MAGIC); |
| 668 | return 0; |
| 669 | } |
| 670 | |
| 671 | if ((dc->config_table.version == 0) |
| 672 | || (dc->config_table.toggle.enabled == TOGGLE_VALID)) { |
| 673 | int i; |
| 674 | DBG1("Second phase, configuring card"); |
| 675 | |
| 676 | setup_memory(dc); |
| 677 | |
| 678 | dc->port[PORT_MDM].toggle_ul = dc->config_table.toggle.mdm_ul; |
| 679 | dc->port[PORT_MDM].toggle_dl = dc->config_table.toggle.mdm_dl; |
| 680 | dc->port[PORT_DIAG].toggle_dl = dc->config_table.toggle.diag_dl; |
| 681 | DBG1("toggle ports: MDM UL:%d MDM DL:%d, DIAG DL:%d", |
| 682 | dc->port[PORT_MDM].toggle_ul, |
| 683 | dc->port[PORT_MDM].toggle_dl, dc->port[PORT_DIAG].toggle_dl); |
| 684 | |
| 685 | dump_table(dc); |
| 686 | |
| 687 | for (i = PORT_MDM; i < MAX_PORT; i++) { |
| 688 | dc->port[i].fifo_ul = |
| 689 | kfifo_alloc(FIFO_BUFFER_SIZE_UL, GFP_ATOMIC, NULL); |
| 690 | memset(&dc->port[i].ctrl_dl, 0, sizeof(struct ctrl_dl)); |
| 691 | memset(&dc->port[i].ctrl_ul, 0, sizeof(struct ctrl_ul)); |
| 692 | } |
| 693 | |
| 694 | /* Enable control channel */ |
| 695 | dc->last_ier = dc->last_ier | CTRL_DL; |
| 696 | writew(dc->last_ier, dc->reg_ier); |
| 697 | |
Frank Seidel | 661b4e8 | 2008-03-06 21:45:57 +0100 | [diff] [blame] | 698 | dc->state = NOZOMI_STATE_ALLOCATED; |
Frank Seidel | 20fd1e3 | 2007-11-09 14:49:23 +0100 | [diff] [blame] | 699 | dev_info(&dc->pdev->dev, "Initialization OK!\n"); |
| 700 | return 1; |
| 701 | } |
| 702 | |
| 703 | if ((dc->config_table.version > 0) |
| 704 | && (dc->config_table.toggle.enabled != TOGGLE_VALID)) { |
| 705 | u32 offset = 0; |
| 706 | DBG1("First phase: pushing upload buffers, clearing download"); |
| 707 | |
| 708 | dev_info(&dc->pdev->dev, "Version of card: %d\n", |
| 709 | dc->config_table.version); |
| 710 | |
| 711 | /* Here we should disable all I/O over F32. */ |
| 712 | setup_memory(dc); |
| 713 | |
| 714 | /* |
| 715 | * We should send ALL channel pair tokens back along |
| 716 | * with reset token |
| 717 | */ |
| 718 | |
| 719 | /* push upload modem buffers */ |
| 720 | write_mem32(dc->port[PORT_MDM].ul_addr[CH_A], |
| 721 | (u32 *) &offset, 4); |
| 722 | write_mem32(dc->port[PORT_MDM].ul_addr[CH_B], |
| 723 | (u32 *) &offset, 4); |
| 724 | |
| 725 | writew(MDM_UL | DIAG_DL | MDM_DL, dc->reg_fcr); |
| 726 | |
| 727 | DBG1("First phase done"); |
| 728 | } |
| 729 | |
| 730 | return 1; |
| 731 | } |
| 732 | |
| 733 | /* Enable uplink interrupts */ |
| 734 | static void enable_transmit_ul(enum port_type port, struct nozomi *dc) |
| 735 | { |
Jan Engelhardt | 71e1b4a | 2008-02-01 09:13:53 +0100 | [diff] [blame] | 736 | static const u16 mask[] = {MDM_UL, DIAG_UL, APP1_UL, APP2_UL, CTRL_UL}; |
Frank Seidel | 20fd1e3 | 2007-11-09 14:49:23 +0100 | [diff] [blame] | 737 | |
| 738 | if (port < NOZOMI_MAX_PORTS) { |
| 739 | dc->last_ier |= mask[port]; |
| 740 | writew(dc->last_ier, dc->reg_ier); |
| 741 | } else { |
| 742 | dev_err(&dc->pdev->dev, "Called with wrong port?\n"); |
| 743 | } |
| 744 | } |
| 745 | |
| 746 | /* Disable uplink interrupts */ |
| 747 | static void disable_transmit_ul(enum port_type port, struct nozomi *dc) |
| 748 | { |
Jan Engelhardt | 71e1b4a | 2008-02-01 09:13:53 +0100 | [diff] [blame] | 749 | static const u16 mask[] = |
| 750 | {~MDM_UL, ~DIAG_UL, ~APP1_UL, ~APP2_UL, ~CTRL_UL}; |
Frank Seidel | 20fd1e3 | 2007-11-09 14:49:23 +0100 | [diff] [blame] | 751 | |
| 752 | if (port < NOZOMI_MAX_PORTS) { |
| 753 | dc->last_ier &= mask[port]; |
| 754 | writew(dc->last_ier, dc->reg_ier); |
| 755 | } else { |
| 756 | dev_err(&dc->pdev->dev, "Called with wrong port?\n"); |
| 757 | } |
| 758 | } |
| 759 | |
| 760 | /* Enable downlink interrupts */ |
| 761 | static void enable_transmit_dl(enum port_type port, struct nozomi *dc) |
| 762 | { |
Jan Engelhardt | 71e1b4a | 2008-02-01 09:13:53 +0100 | [diff] [blame] | 763 | static const u16 mask[] = {MDM_DL, DIAG_DL, APP1_DL, APP2_DL, CTRL_DL}; |
Frank Seidel | 20fd1e3 | 2007-11-09 14:49:23 +0100 | [diff] [blame] | 764 | |
| 765 | if (port < NOZOMI_MAX_PORTS) { |
| 766 | dc->last_ier |= mask[port]; |
| 767 | writew(dc->last_ier, dc->reg_ier); |
| 768 | } else { |
| 769 | dev_err(&dc->pdev->dev, "Called with wrong port?\n"); |
| 770 | } |
| 771 | } |
| 772 | |
| 773 | /* Disable downlink interrupts */ |
| 774 | static void disable_transmit_dl(enum port_type port, struct nozomi *dc) |
| 775 | { |
Jan Engelhardt | 71e1b4a | 2008-02-01 09:13:53 +0100 | [diff] [blame] | 776 | static const u16 mask[] = |
| 777 | {~MDM_DL, ~DIAG_DL, ~APP1_DL, ~APP2_DL, ~CTRL_DL}; |
Frank Seidel | 20fd1e3 | 2007-11-09 14:49:23 +0100 | [diff] [blame] | 778 | |
| 779 | if (port < NOZOMI_MAX_PORTS) { |
| 780 | dc->last_ier &= mask[port]; |
| 781 | writew(dc->last_ier, dc->reg_ier); |
| 782 | } else { |
| 783 | dev_err(&dc->pdev->dev, "Called with wrong port?\n"); |
| 784 | } |
| 785 | } |
| 786 | |
| 787 | /* |
| 788 | * Return 1 - send buffer to card and ack. |
| 789 | * Return 0 - don't ack, don't send buffer to card. |
| 790 | */ |
Frank Seidel | 18bbe0c2 | 2008-02-01 09:14:05 +0100 | [diff] [blame] | 791 | static int send_data(enum port_type index, const struct nozomi *dc) |
Frank Seidel | 20fd1e3 | 2007-11-09 14:49:23 +0100 | [diff] [blame] | 792 | { |
| 793 | u32 size = 0; |
Jan Engelhardt | 71e1b4a | 2008-02-01 09:13:53 +0100 | [diff] [blame] | 794 | const struct port *port = &dc->port[index]; |
Frank Seidel | 18bbe0c2 | 2008-02-01 09:14:05 +0100 | [diff] [blame] | 795 | const u8 toggle = port->toggle_ul; |
Frank Seidel | 20fd1e3 | 2007-11-09 14:49:23 +0100 | [diff] [blame] | 796 | void __iomem *addr = port->ul_addr[toggle]; |
Frank Seidel | 18bbe0c2 | 2008-02-01 09:14:05 +0100 | [diff] [blame] | 797 | const u32 ul_size = port->ul_size[toggle]; |
Frank Seidel | 20fd1e3 | 2007-11-09 14:49:23 +0100 | [diff] [blame] | 798 | struct tty_struct *tty = port->tty; |
| 799 | |
| 800 | /* Get data from tty and place in buf for now */ |
| 801 | size = __kfifo_get(port->fifo_ul, dc->send_buf, |
| 802 | ul_size < SEND_BUF_MAX ? ul_size : SEND_BUF_MAX); |
| 803 | |
| 804 | if (size == 0) { |
| 805 | DBG4("No more data to send, disable link:"); |
| 806 | return 0; |
| 807 | } |
| 808 | |
| 809 | /* DUMP(buf, size); */ |
| 810 | |
| 811 | /* Write length + data */ |
| 812 | write_mem32(addr, (u32 *) &size, 4); |
| 813 | write_mem32(addr + 4, (u32 *) dc->send_buf, size); |
| 814 | |
| 815 | if (tty) |
| 816 | tty_wakeup(tty); |
| 817 | |
| 818 | return 1; |
| 819 | } |
| 820 | |
| 821 | /* If all data has been read, return 1, else 0 */ |
| 822 | static int receive_data(enum port_type index, struct nozomi *dc) |
| 823 | { |
| 824 | u8 buf[RECEIVE_BUF_MAX] = { 0 }; |
| 825 | int size; |
| 826 | u32 offset = 4; |
| 827 | struct port *port = &dc->port[index]; |
| 828 | void __iomem *addr = port->dl_addr[port->toggle_dl]; |
| 829 | struct tty_struct *tty = port->tty; |
| 830 | int i; |
| 831 | |
| 832 | if (unlikely(!tty)) { |
| 833 | DBG1("tty not open for port: %d?", index); |
| 834 | return 1; |
| 835 | } |
| 836 | |
| 837 | read_mem32((u32 *) &size, addr, 4); |
| 838 | /* DBG1( "%d bytes port: %d", size, index); */ |
| 839 | |
| 840 | if (test_bit(TTY_THROTTLED, &tty->flags)) { |
| 841 | DBG1("No room in tty, don't read data, don't ack interrupt, " |
| 842 | "disable interrupt"); |
| 843 | |
| 844 | /* disable interrupt in downlink... */ |
| 845 | disable_transmit_dl(index, dc); |
| 846 | return 0; |
| 847 | } |
| 848 | |
| 849 | if (unlikely(size == 0)) { |
| 850 | dev_err(&dc->pdev->dev, "size == 0?\n"); |
| 851 | return 1; |
| 852 | } |
| 853 | |
| 854 | tty_buffer_request_room(tty, size); |
| 855 | |
| 856 | while (size > 0) { |
| 857 | read_mem32((u32 *) buf, addr + offset, RECEIVE_BUF_MAX); |
| 858 | |
| 859 | if (size == 1) { |
| 860 | tty_insert_flip_char(tty, buf[0], TTY_NORMAL); |
| 861 | size = 0; |
| 862 | } else if (size < RECEIVE_BUF_MAX) { |
| 863 | size -= tty_insert_flip_string(tty, (char *) buf, size); |
| 864 | } else { |
| 865 | i = tty_insert_flip_string(tty, \ |
| 866 | (char *) buf, RECEIVE_BUF_MAX); |
| 867 | size -= i; |
| 868 | offset += i; |
| 869 | } |
| 870 | } |
| 871 | |
| 872 | set_bit(index, &dc->flip); |
| 873 | |
| 874 | return 1; |
| 875 | } |
| 876 | |
| 877 | /* Debug for interrupts */ |
| 878 | #ifdef DEBUG |
| 879 | static char *interrupt2str(u16 interrupt) |
| 880 | { |
| 881 | static char buf[TMP_BUF_MAX]; |
| 882 | char *p = buf; |
| 883 | |
| 884 | interrupt & MDM_DL1 ? p += snprintf(p, TMP_BUF_MAX, "MDM_DL1 ") : NULL; |
| 885 | interrupt & MDM_DL2 ? p += snprintf(p, TMP_BUF_MAX - (p - buf), |
| 886 | "MDM_DL2 ") : NULL; |
| 887 | |
| 888 | interrupt & MDM_UL1 ? p += snprintf(p, TMP_BUF_MAX - (p - buf), |
| 889 | "MDM_UL1 ") : NULL; |
| 890 | interrupt & MDM_UL2 ? p += snprintf(p, TMP_BUF_MAX - (p - buf), |
| 891 | "MDM_UL2 ") : NULL; |
| 892 | |
| 893 | interrupt & DIAG_DL1 ? p += snprintf(p, TMP_BUF_MAX - (p - buf), |
| 894 | "DIAG_DL1 ") : NULL; |
| 895 | interrupt & DIAG_DL2 ? p += snprintf(p, TMP_BUF_MAX - (p - buf), |
| 896 | "DIAG_DL2 ") : NULL; |
| 897 | |
| 898 | interrupt & DIAG_UL ? p += snprintf(p, TMP_BUF_MAX - (p - buf), |
| 899 | "DIAG_UL ") : NULL; |
| 900 | |
| 901 | interrupt & APP1_DL ? p += snprintf(p, TMP_BUF_MAX - (p - buf), |
| 902 | "APP1_DL ") : NULL; |
| 903 | interrupt & APP2_DL ? p += snprintf(p, TMP_BUF_MAX - (p - buf), |
| 904 | "APP2_DL ") : NULL; |
| 905 | |
| 906 | interrupt & APP1_UL ? p += snprintf(p, TMP_BUF_MAX - (p - buf), |
| 907 | "APP1_UL ") : NULL; |
| 908 | interrupt & APP2_UL ? p += snprintf(p, TMP_BUF_MAX - (p - buf), |
| 909 | "APP2_UL ") : NULL; |
| 910 | |
| 911 | interrupt & CTRL_DL ? p += snprintf(p, TMP_BUF_MAX - (p - buf), |
| 912 | "CTRL_DL ") : NULL; |
| 913 | interrupt & CTRL_UL ? p += snprintf(p, TMP_BUF_MAX - (p - buf), |
| 914 | "CTRL_UL ") : NULL; |
| 915 | |
| 916 | interrupt & RESET ? p += snprintf(p, TMP_BUF_MAX - (p - buf), |
| 917 | "RESET ") : NULL; |
| 918 | |
| 919 | return buf; |
| 920 | } |
| 921 | #endif |
| 922 | |
| 923 | /* |
| 924 | * Receive flow control |
| 925 | * Return 1 - If ok, else 0 |
| 926 | */ |
| 927 | static int receive_flow_control(struct nozomi *dc) |
| 928 | { |
| 929 | enum port_type port = PORT_MDM; |
| 930 | struct ctrl_dl ctrl_dl; |
| 931 | struct ctrl_dl old_ctrl; |
| 932 | u16 enable_ier = 0; |
| 933 | |
| 934 | read_mem32((u32 *) &ctrl_dl, dc->port[PORT_CTRL].dl_addr[CH_A], 2); |
| 935 | |
| 936 | switch (ctrl_dl.port) { |
| 937 | case CTRL_CMD: |
| 938 | DBG1("The Base Band sends this value as a response to a " |
| 939 | "request for IMSI detach sent over the control " |
| 940 | "channel uplink (see section 7.6.1)."); |
| 941 | break; |
| 942 | case CTRL_MDM: |
| 943 | port = PORT_MDM; |
| 944 | enable_ier = MDM_DL; |
| 945 | break; |
| 946 | case CTRL_DIAG: |
| 947 | port = PORT_DIAG; |
| 948 | enable_ier = DIAG_DL; |
| 949 | break; |
| 950 | case CTRL_APP1: |
| 951 | port = PORT_APP1; |
| 952 | enable_ier = APP1_DL; |
| 953 | break; |
| 954 | case CTRL_APP2: |
| 955 | port = PORT_APP2; |
| 956 | enable_ier = APP2_DL; |
Frank Seidel | 661b4e8 | 2008-03-06 21:45:57 +0100 | [diff] [blame] | 957 | if (dc->state == NOZOMI_STATE_ALLOCATED) { |
| 958 | /* |
| 959 | * After card initialization the flow control |
| 960 | * received for APP2 is always the last |
| 961 | */ |
| 962 | dc->state = NOZOMI_STATE_READY; |
| 963 | dev_info(&dc->pdev->dev, "Device READY!\n"); |
| 964 | } |
Frank Seidel | 20fd1e3 | 2007-11-09 14:49:23 +0100 | [diff] [blame] | 965 | break; |
| 966 | default: |
| 967 | dev_err(&dc->pdev->dev, |
| 968 | "ERROR: flow control received for non-existing port\n"); |
| 969 | return 0; |
| 970 | }; |
| 971 | |
| 972 | DBG1("0x%04X->0x%04X", *((u16 *)&dc->port[port].ctrl_dl), |
| 973 | *((u16 *)&ctrl_dl)); |
| 974 | |
| 975 | old_ctrl = dc->port[port].ctrl_dl; |
| 976 | dc->port[port].ctrl_dl = ctrl_dl; |
| 977 | |
| 978 | if (old_ctrl.CTS == 1 && ctrl_dl.CTS == 0) { |
| 979 | DBG1("Disable interrupt (0x%04X) on port: %d", |
| 980 | enable_ier, port); |
| 981 | disable_transmit_ul(port, dc); |
| 982 | |
| 983 | } else if (old_ctrl.CTS == 0 && ctrl_dl.CTS == 1) { |
| 984 | |
| 985 | if (__kfifo_len(dc->port[port].fifo_ul)) { |
| 986 | DBG1("Enable interrupt (0x%04X) on port: %d", |
| 987 | enable_ier, port); |
| 988 | DBG1("Data in buffer [%d], enable transmit! ", |
| 989 | __kfifo_len(dc->port[port].fifo_ul)); |
| 990 | enable_transmit_ul(port, dc); |
| 991 | } else { |
| 992 | DBG1("No data in buffer..."); |
| 993 | } |
| 994 | } |
| 995 | |
| 996 | if (*(u16 *)&old_ctrl == *(u16 *)&ctrl_dl) { |
| 997 | DBG1(" No change in mctrl"); |
| 998 | return 1; |
| 999 | } |
| 1000 | /* Update statistics */ |
| 1001 | if (old_ctrl.CTS != ctrl_dl.CTS) |
| 1002 | dc->port[port].tty_icount.cts++; |
| 1003 | if (old_ctrl.DSR != ctrl_dl.DSR) |
| 1004 | dc->port[port].tty_icount.dsr++; |
| 1005 | if (old_ctrl.RI != ctrl_dl.RI) |
| 1006 | dc->port[port].tty_icount.rng++; |
| 1007 | if (old_ctrl.DCD != ctrl_dl.DCD) |
| 1008 | dc->port[port].tty_icount.dcd++; |
| 1009 | |
| 1010 | wake_up_interruptible(&dc->port[port].tty_wait); |
| 1011 | |
| 1012 | DBG1("port: %d DCD(%d), CTS(%d), RI(%d), DSR(%d)", |
| 1013 | port, |
| 1014 | dc->port[port].tty_icount.dcd, dc->port[port].tty_icount.cts, |
| 1015 | dc->port[port].tty_icount.rng, dc->port[port].tty_icount.dsr); |
| 1016 | |
| 1017 | return 1; |
| 1018 | } |
| 1019 | |
| 1020 | static enum ctrl_port_type port2ctrl(enum port_type port, |
| 1021 | const struct nozomi *dc) |
| 1022 | { |
| 1023 | switch (port) { |
| 1024 | case PORT_MDM: |
| 1025 | return CTRL_MDM; |
| 1026 | case PORT_DIAG: |
| 1027 | return CTRL_DIAG; |
| 1028 | case PORT_APP1: |
| 1029 | return CTRL_APP1; |
| 1030 | case PORT_APP2: |
| 1031 | return CTRL_APP2; |
| 1032 | default: |
| 1033 | dev_err(&dc->pdev->dev, |
| 1034 | "ERROR: send flow control " \ |
| 1035 | "received for non-existing port\n"); |
| 1036 | }; |
| 1037 | return CTRL_ERROR; |
| 1038 | } |
| 1039 | |
| 1040 | /* |
| 1041 | * Send flow control, can only update one channel at a time |
| 1042 | * Return 0 - If we have updated all flow control |
| 1043 | * Return 1 - If we need to update more flow control, ack current enable more |
| 1044 | */ |
| 1045 | static int send_flow_control(struct nozomi *dc) |
| 1046 | { |
| 1047 | u32 i, more_flow_control_to_be_updated = 0; |
| 1048 | u16 *ctrl; |
| 1049 | |
| 1050 | for (i = PORT_MDM; i < MAX_PORT; i++) { |
| 1051 | if (dc->port[i].update_flow_control) { |
| 1052 | if (more_flow_control_to_be_updated) { |
| 1053 | /* We have more flow control to be updated */ |
| 1054 | return 1; |
| 1055 | } |
| 1056 | dc->port[i].ctrl_ul.port = port2ctrl(i, dc); |
| 1057 | ctrl = (u16 *)&dc->port[i].ctrl_ul; |
| 1058 | write_mem32(dc->port[PORT_CTRL].ul_addr[0], \ |
| 1059 | (u32 *) ctrl, 2); |
| 1060 | dc->port[i].update_flow_control = 0; |
| 1061 | more_flow_control_to_be_updated = 1; |
| 1062 | } |
| 1063 | } |
| 1064 | return 0; |
| 1065 | } |
| 1066 | |
| 1067 | /* |
Frank Seidel | e9ed537 | 2008-01-25 21:13:24 +0100 | [diff] [blame] | 1068 | * Handle downlink data, ports that are handled are modem and diagnostics |
Frank Seidel | 20fd1e3 | 2007-11-09 14:49:23 +0100 | [diff] [blame] | 1069 | * Return 1 - ok |
| 1070 | * Return 0 - toggle fields are out of sync |
| 1071 | */ |
| 1072 | static int handle_data_dl(struct nozomi *dc, enum port_type port, u8 *toggle, |
| 1073 | u16 read_iir, u16 mask1, u16 mask2) |
| 1074 | { |
| 1075 | if (*toggle == 0 && read_iir & mask1) { |
| 1076 | if (receive_data(port, dc)) { |
| 1077 | writew(mask1, dc->reg_fcr); |
| 1078 | *toggle = !(*toggle); |
| 1079 | } |
| 1080 | |
| 1081 | if (read_iir & mask2) { |
| 1082 | if (receive_data(port, dc)) { |
| 1083 | writew(mask2, dc->reg_fcr); |
| 1084 | *toggle = !(*toggle); |
| 1085 | } |
| 1086 | } |
| 1087 | } else if (*toggle == 1 && read_iir & mask2) { |
| 1088 | if (receive_data(port, dc)) { |
| 1089 | writew(mask2, dc->reg_fcr); |
| 1090 | *toggle = !(*toggle); |
| 1091 | } |
| 1092 | |
| 1093 | if (read_iir & mask1) { |
| 1094 | if (receive_data(port, dc)) { |
| 1095 | writew(mask1, dc->reg_fcr); |
| 1096 | *toggle = !(*toggle); |
| 1097 | } |
| 1098 | } |
| 1099 | } else { |
| 1100 | dev_err(&dc->pdev->dev, "port out of sync!, toggle:%d\n", |
| 1101 | *toggle); |
| 1102 | return 0; |
| 1103 | } |
| 1104 | return 1; |
| 1105 | } |
| 1106 | |
| 1107 | /* |
| 1108 | * Handle uplink data, this is currently for the modem port |
| 1109 | * Return 1 - ok |
| 1110 | * Return 0 - toggle field are out of sync |
| 1111 | */ |
| 1112 | static int handle_data_ul(struct nozomi *dc, enum port_type port, u16 read_iir) |
| 1113 | { |
| 1114 | u8 *toggle = &(dc->port[port].toggle_ul); |
| 1115 | |
| 1116 | if (*toggle == 0 && read_iir & MDM_UL1) { |
| 1117 | dc->last_ier &= ~MDM_UL; |
| 1118 | writew(dc->last_ier, dc->reg_ier); |
| 1119 | if (send_data(port, dc)) { |
| 1120 | writew(MDM_UL1, dc->reg_fcr); |
| 1121 | dc->last_ier = dc->last_ier | MDM_UL; |
| 1122 | writew(dc->last_ier, dc->reg_ier); |
| 1123 | *toggle = !*toggle; |
| 1124 | } |
| 1125 | |
| 1126 | if (read_iir & MDM_UL2) { |
| 1127 | dc->last_ier &= ~MDM_UL; |
| 1128 | writew(dc->last_ier, dc->reg_ier); |
| 1129 | if (send_data(port, dc)) { |
| 1130 | writew(MDM_UL2, dc->reg_fcr); |
| 1131 | dc->last_ier = dc->last_ier | MDM_UL; |
| 1132 | writew(dc->last_ier, dc->reg_ier); |
| 1133 | *toggle = !*toggle; |
| 1134 | } |
| 1135 | } |
| 1136 | |
| 1137 | } else if (*toggle == 1 && read_iir & MDM_UL2) { |
| 1138 | dc->last_ier &= ~MDM_UL; |
| 1139 | writew(dc->last_ier, dc->reg_ier); |
| 1140 | if (send_data(port, dc)) { |
| 1141 | writew(MDM_UL2, dc->reg_fcr); |
| 1142 | dc->last_ier = dc->last_ier | MDM_UL; |
| 1143 | writew(dc->last_ier, dc->reg_ier); |
| 1144 | *toggle = !*toggle; |
| 1145 | } |
| 1146 | |
| 1147 | if (read_iir & MDM_UL1) { |
| 1148 | dc->last_ier &= ~MDM_UL; |
| 1149 | writew(dc->last_ier, dc->reg_ier); |
| 1150 | if (send_data(port, dc)) { |
| 1151 | writew(MDM_UL1, dc->reg_fcr); |
| 1152 | dc->last_ier = dc->last_ier | MDM_UL; |
| 1153 | writew(dc->last_ier, dc->reg_ier); |
| 1154 | *toggle = !*toggle; |
| 1155 | } |
| 1156 | } |
| 1157 | } else { |
| 1158 | writew(read_iir & MDM_UL, dc->reg_fcr); |
| 1159 | dev_err(&dc->pdev->dev, "port out of sync!\n"); |
| 1160 | return 0; |
| 1161 | } |
| 1162 | return 1; |
| 1163 | } |
| 1164 | |
| 1165 | static irqreturn_t interrupt_handler(int irq, void *dev_id) |
| 1166 | { |
| 1167 | struct nozomi *dc = dev_id; |
| 1168 | unsigned int a; |
| 1169 | u16 read_iir; |
| 1170 | |
| 1171 | if (!dc) |
| 1172 | return IRQ_NONE; |
| 1173 | |
| 1174 | spin_lock(&dc->spin_mutex); |
| 1175 | read_iir = readw(dc->reg_iir); |
| 1176 | |
| 1177 | /* Card removed */ |
| 1178 | if (read_iir == (u16)-1) |
| 1179 | goto none; |
| 1180 | /* |
| 1181 | * Just handle interrupt enabled in IER |
| 1182 | * (by masking with dc->last_ier) |
| 1183 | */ |
| 1184 | read_iir &= dc->last_ier; |
| 1185 | |
| 1186 | if (read_iir == 0) |
| 1187 | goto none; |
| 1188 | |
| 1189 | |
| 1190 | DBG4("%s irq:0x%04X, prev:0x%04X", interrupt2str(read_iir), read_iir, |
| 1191 | dc->last_ier); |
| 1192 | |
| 1193 | if (read_iir & RESET) { |
| 1194 | if (unlikely(!nozomi_read_config_table(dc))) { |
| 1195 | dc->last_ier = 0x0; |
| 1196 | writew(dc->last_ier, dc->reg_ier); |
| 1197 | dev_err(&dc->pdev->dev, "Could not read status from " |
| 1198 | "card, we should disable interface\n"); |
| 1199 | } else { |
| 1200 | writew(RESET, dc->reg_fcr); |
| 1201 | } |
| 1202 | /* No more useful info if this was the reset interrupt. */ |
| 1203 | goto exit_handler; |
| 1204 | } |
| 1205 | if (read_iir & CTRL_UL) { |
| 1206 | DBG1("CTRL_UL"); |
| 1207 | dc->last_ier &= ~CTRL_UL; |
| 1208 | writew(dc->last_ier, dc->reg_ier); |
| 1209 | if (send_flow_control(dc)) { |
| 1210 | writew(CTRL_UL, dc->reg_fcr); |
| 1211 | dc->last_ier = dc->last_ier | CTRL_UL; |
| 1212 | writew(dc->last_ier, dc->reg_ier); |
| 1213 | } |
| 1214 | } |
| 1215 | if (read_iir & CTRL_DL) { |
| 1216 | receive_flow_control(dc); |
| 1217 | writew(CTRL_DL, dc->reg_fcr); |
| 1218 | } |
| 1219 | if (read_iir & MDM_DL) { |
| 1220 | if (!handle_data_dl(dc, PORT_MDM, |
| 1221 | &(dc->port[PORT_MDM].toggle_dl), read_iir, |
| 1222 | MDM_DL1, MDM_DL2)) { |
| 1223 | dev_err(&dc->pdev->dev, "MDM_DL out of sync!\n"); |
| 1224 | goto exit_handler; |
| 1225 | } |
| 1226 | } |
| 1227 | if (read_iir & MDM_UL) { |
| 1228 | if (!handle_data_ul(dc, PORT_MDM, read_iir)) { |
| 1229 | dev_err(&dc->pdev->dev, "MDM_UL out of sync!\n"); |
| 1230 | goto exit_handler; |
| 1231 | } |
| 1232 | } |
| 1233 | if (read_iir & DIAG_DL) { |
| 1234 | if (!handle_data_dl(dc, PORT_DIAG, |
| 1235 | &(dc->port[PORT_DIAG].toggle_dl), read_iir, |
| 1236 | DIAG_DL1, DIAG_DL2)) { |
| 1237 | dev_err(&dc->pdev->dev, "DIAG_DL out of sync!\n"); |
| 1238 | goto exit_handler; |
| 1239 | } |
| 1240 | } |
| 1241 | if (read_iir & DIAG_UL) { |
| 1242 | dc->last_ier &= ~DIAG_UL; |
| 1243 | writew(dc->last_ier, dc->reg_ier); |
| 1244 | if (send_data(PORT_DIAG, dc)) { |
| 1245 | writew(DIAG_UL, dc->reg_fcr); |
| 1246 | dc->last_ier = dc->last_ier | DIAG_UL; |
| 1247 | writew(dc->last_ier, dc->reg_ier); |
| 1248 | } |
| 1249 | } |
| 1250 | if (read_iir & APP1_DL) { |
| 1251 | if (receive_data(PORT_APP1, dc)) |
| 1252 | writew(APP1_DL, dc->reg_fcr); |
| 1253 | } |
| 1254 | if (read_iir & APP1_UL) { |
| 1255 | dc->last_ier &= ~APP1_UL; |
| 1256 | writew(dc->last_ier, dc->reg_ier); |
| 1257 | if (send_data(PORT_APP1, dc)) { |
| 1258 | writew(APP1_UL, dc->reg_fcr); |
| 1259 | dc->last_ier = dc->last_ier | APP1_UL; |
| 1260 | writew(dc->last_ier, dc->reg_ier); |
| 1261 | } |
| 1262 | } |
| 1263 | if (read_iir & APP2_DL) { |
| 1264 | if (receive_data(PORT_APP2, dc)) |
| 1265 | writew(APP2_DL, dc->reg_fcr); |
| 1266 | } |
| 1267 | if (read_iir & APP2_UL) { |
| 1268 | dc->last_ier &= ~APP2_UL; |
| 1269 | writew(dc->last_ier, dc->reg_ier); |
| 1270 | if (send_data(PORT_APP2, dc)) { |
| 1271 | writew(APP2_UL, dc->reg_fcr); |
| 1272 | dc->last_ier = dc->last_ier | APP2_UL; |
| 1273 | writew(dc->last_ier, dc->reg_ier); |
| 1274 | } |
| 1275 | } |
| 1276 | |
| 1277 | exit_handler: |
| 1278 | spin_unlock(&dc->spin_mutex); |
| 1279 | for (a = 0; a < NOZOMI_MAX_PORTS; a++) |
| 1280 | if (test_and_clear_bit(a, &dc->flip)) |
| 1281 | tty_flip_buffer_push(dc->port[a].tty); |
| 1282 | return IRQ_HANDLED; |
| 1283 | none: |
| 1284 | spin_unlock(&dc->spin_mutex); |
| 1285 | return IRQ_NONE; |
| 1286 | } |
| 1287 | |
| 1288 | static void nozomi_get_card_type(struct nozomi *dc) |
| 1289 | { |
| 1290 | int i; |
| 1291 | u32 size = 0; |
| 1292 | |
| 1293 | for (i = 0; i < 6; i++) |
| 1294 | size += pci_resource_len(dc->pdev, i); |
| 1295 | |
| 1296 | /* Assume card type F32_8 if no match */ |
| 1297 | dc->card_type = size == 2048 ? F32_2 : F32_8; |
| 1298 | |
| 1299 | dev_info(&dc->pdev->dev, "Card type is: %d\n", dc->card_type); |
| 1300 | } |
| 1301 | |
| 1302 | static void nozomi_setup_private_data(struct nozomi *dc) |
| 1303 | { |
| 1304 | void __iomem *offset = dc->base_addr + dc->card_type / 2; |
| 1305 | unsigned int i; |
| 1306 | |
| 1307 | dc->reg_fcr = (void __iomem *)(offset + R_FCR); |
| 1308 | dc->reg_iir = (void __iomem *)(offset + R_IIR); |
| 1309 | dc->reg_ier = (void __iomem *)(offset + R_IER); |
| 1310 | dc->last_ier = 0; |
| 1311 | dc->flip = 0; |
| 1312 | |
| 1313 | dc->port[PORT_MDM].token_dl = MDM_DL; |
| 1314 | dc->port[PORT_DIAG].token_dl = DIAG_DL; |
| 1315 | dc->port[PORT_APP1].token_dl = APP1_DL; |
| 1316 | dc->port[PORT_APP2].token_dl = APP2_DL; |
| 1317 | |
| 1318 | for (i = 0; i < MAX_PORT; i++) |
| 1319 | init_waitqueue_head(&dc->port[i].tty_wait); |
| 1320 | } |
| 1321 | |
| 1322 | static ssize_t card_type_show(struct device *dev, struct device_attribute *attr, |
| 1323 | char *buf) |
| 1324 | { |
Jan Engelhardt | 71e1b4a | 2008-02-01 09:13:53 +0100 | [diff] [blame] | 1325 | const struct nozomi *dc = pci_get_drvdata(to_pci_dev(dev)); |
Frank Seidel | 20fd1e3 | 2007-11-09 14:49:23 +0100 | [diff] [blame] | 1326 | |
| 1327 | return sprintf(buf, "%d\n", dc->card_type); |
| 1328 | } |
Frank Seidel | e9ed537 | 2008-01-25 21:13:24 +0100 | [diff] [blame] | 1329 | static DEVICE_ATTR(card_type, S_IRUGO, card_type_show, NULL); |
Frank Seidel | 20fd1e3 | 2007-11-09 14:49:23 +0100 | [diff] [blame] | 1330 | |
| 1331 | static ssize_t open_ttys_show(struct device *dev, struct device_attribute *attr, |
| 1332 | char *buf) |
| 1333 | { |
Jan Engelhardt | 71e1b4a | 2008-02-01 09:13:53 +0100 | [diff] [blame] | 1334 | const struct nozomi *dc = pci_get_drvdata(to_pci_dev(dev)); |
Frank Seidel | 20fd1e3 | 2007-11-09 14:49:23 +0100 | [diff] [blame] | 1335 | |
| 1336 | return sprintf(buf, "%u\n", dc->open_ttys); |
| 1337 | } |
Frank Seidel | e9ed537 | 2008-01-25 21:13:24 +0100 | [diff] [blame] | 1338 | static DEVICE_ATTR(open_ttys, S_IRUGO, open_ttys_show, NULL); |
Frank Seidel | 20fd1e3 | 2007-11-09 14:49:23 +0100 | [diff] [blame] | 1339 | |
| 1340 | static void make_sysfs_files(struct nozomi *dc) |
| 1341 | { |
| 1342 | if (device_create_file(&dc->pdev->dev, &dev_attr_card_type)) |
| 1343 | dev_err(&dc->pdev->dev, |
| 1344 | "Could not create sysfs file for card_type\n"); |
| 1345 | if (device_create_file(&dc->pdev->dev, &dev_attr_open_ttys)) |
| 1346 | dev_err(&dc->pdev->dev, |
| 1347 | "Could not create sysfs file for open_ttys\n"); |
| 1348 | } |
| 1349 | |
| 1350 | static void remove_sysfs_files(struct nozomi *dc) |
| 1351 | { |
| 1352 | device_remove_file(&dc->pdev->dev, &dev_attr_card_type); |
| 1353 | device_remove_file(&dc->pdev->dev, &dev_attr_open_ttys); |
| 1354 | } |
| 1355 | |
| 1356 | /* Allocate memory for one device */ |
| 1357 | static int __devinit nozomi_card_init(struct pci_dev *pdev, |
| 1358 | const struct pci_device_id *ent) |
| 1359 | { |
| 1360 | resource_size_t start; |
| 1361 | int ret; |
| 1362 | struct nozomi *dc = NULL; |
| 1363 | int ndev_idx; |
| 1364 | int i; |
| 1365 | |
| 1366 | dev_dbg(&pdev->dev, "Init, new card found\n"); |
| 1367 | |
| 1368 | for (ndev_idx = 0; ndev_idx < ARRAY_SIZE(ndevs); ndev_idx++) |
| 1369 | if (!ndevs[ndev_idx]) |
| 1370 | break; |
| 1371 | |
| 1372 | if (ndev_idx >= ARRAY_SIZE(ndevs)) { |
| 1373 | dev_err(&pdev->dev, "no free tty range for this card left\n"); |
| 1374 | ret = -EIO; |
| 1375 | goto err; |
| 1376 | } |
| 1377 | |
| 1378 | dc = kzalloc(sizeof(struct nozomi), GFP_KERNEL); |
| 1379 | if (unlikely(!dc)) { |
| 1380 | dev_err(&pdev->dev, "Could not allocate memory\n"); |
| 1381 | ret = -ENOMEM; |
| 1382 | goto err_free; |
| 1383 | } |
| 1384 | |
| 1385 | dc->pdev = pdev; |
| 1386 | |
Frank Seidel | 20fd1e3 | 2007-11-09 14:49:23 +0100 | [diff] [blame] | 1387 | ret = pci_enable_device(dc->pdev); |
| 1388 | if (ret) { |
| 1389 | dev_err(&pdev->dev, "Failed to enable PCI Device\n"); |
| 1390 | goto err_free; |
| 1391 | } |
| 1392 | |
Frank Seidel | 20fd1e3 | 2007-11-09 14:49:23 +0100 | [diff] [blame] | 1393 | ret = pci_request_regions(dc->pdev, NOZOMI_NAME); |
| 1394 | if (ret) { |
| 1395 | dev_err(&pdev->dev, "I/O address 0x%04x already in use\n", |
| 1396 | (int) /* nozomi_private.io_addr */ 0); |
| 1397 | goto err_disable_device; |
| 1398 | } |
| 1399 | |
Frank Seidel | 661b4e8 | 2008-03-06 21:45:57 +0100 | [diff] [blame] | 1400 | start = pci_resource_start(dc->pdev, 0); |
| 1401 | if (start == 0) { |
| 1402 | dev_err(&pdev->dev, "No I/O address for card detected\n"); |
| 1403 | ret = -ENODEV; |
| 1404 | goto err_rel_regs; |
| 1405 | } |
| 1406 | |
| 1407 | /* Find out what card type it is */ |
| 1408 | nozomi_get_card_type(dc); |
| 1409 | |
Alan Cox | 24cb233 | 2008-04-30 00:54:19 -0700 | [diff] [blame] | 1410 | dc->base_addr = ioremap_nocache(start, dc->card_type); |
Frank Seidel | 20fd1e3 | 2007-11-09 14:49:23 +0100 | [diff] [blame] | 1411 | if (!dc->base_addr) { |
| 1412 | dev_err(&pdev->dev, "Unable to map card MMIO\n"); |
| 1413 | ret = -ENODEV; |
| 1414 | goto err_rel_regs; |
| 1415 | } |
| 1416 | |
| 1417 | dc->send_buf = kmalloc(SEND_BUF_MAX, GFP_KERNEL); |
| 1418 | if (!dc->send_buf) { |
| 1419 | dev_err(&pdev->dev, "Could not allocate send buffer?\n"); |
| 1420 | ret = -ENOMEM; |
| 1421 | goto err_free_sbuf; |
| 1422 | } |
| 1423 | |
| 1424 | spin_lock_init(&dc->spin_mutex); |
| 1425 | |
| 1426 | nozomi_setup_private_data(dc); |
| 1427 | |
| 1428 | /* Disable all interrupts */ |
| 1429 | dc->last_ier = 0; |
| 1430 | writew(dc->last_ier, dc->reg_ier); |
| 1431 | |
| 1432 | ret = request_irq(pdev->irq, &interrupt_handler, IRQF_SHARED, |
| 1433 | NOZOMI_NAME, dc); |
| 1434 | if (unlikely(ret)) { |
| 1435 | dev_err(&pdev->dev, "can't request irq %d\n", pdev->irq); |
| 1436 | goto err_free_sbuf; |
| 1437 | } |
| 1438 | |
| 1439 | DBG1("base_addr: %p", dc->base_addr); |
| 1440 | |
| 1441 | make_sysfs_files(dc); |
| 1442 | |
| 1443 | dc->index_start = ndev_idx * MAX_PORT; |
| 1444 | ndevs[ndev_idx] = dc; |
| 1445 | |
Frank Seidel | 661b4e8 | 2008-03-06 21:45:57 +0100 | [diff] [blame] | 1446 | pci_set_drvdata(pdev, dc); |
| 1447 | |
| 1448 | /* Enable RESET interrupt */ |
| 1449 | dc->last_ier = RESET; |
| 1450 | iowrite16(dc->last_ier, dc->reg_ier); |
| 1451 | |
| 1452 | dc->state = NOZOMI_STATE_ENABLED; |
| 1453 | |
Frank Seidel | 20fd1e3 | 2007-11-09 14:49:23 +0100 | [diff] [blame] | 1454 | for (i = 0; i < MAX_PORT; i++) { |
| 1455 | mutex_init(&dc->port[i].tty_sem); |
| 1456 | dc->port[i].tty_open_count = 0; |
| 1457 | dc->port[i].tty = NULL; |
| 1458 | tty_register_device(ntty_driver, dc->index_start + i, |
| 1459 | &pdev->dev); |
| 1460 | } |
| 1461 | |
Frank Seidel | 20fd1e3 | 2007-11-09 14:49:23 +0100 | [diff] [blame] | 1462 | return 0; |
| 1463 | |
| 1464 | err_free_sbuf: |
| 1465 | kfree(dc->send_buf); |
| 1466 | iounmap(dc->base_addr); |
| 1467 | err_rel_regs: |
| 1468 | pci_release_regions(pdev); |
| 1469 | err_disable_device: |
| 1470 | pci_disable_device(pdev); |
| 1471 | err_free: |
| 1472 | kfree(dc); |
| 1473 | err: |
| 1474 | return ret; |
| 1475 | } |
| 1476 | |
| 1477 | static void __devexit tty_exit(struct nozomi *dc) |
| 1478 | { |
| 1479 | unsigned int i; |
| 1480 | |
| 1481 | DBG1(" "); |
| 1482 | |
| 1483 | flush_scheduled_work(); |
| 1484 | |
| 1485 | for (i = 0; i < MAX_PORT; ++i) |
| 1486 | if (dc->port[i].tty && \ |
| 1487 | list_empty(&dc->port[i].tty->hangup_work.entry)) |
| 1488 | tty_hangup(dc->port[i].tty); |
| 1489 | |
| 1490 | while (dc->open_ttys) |
| 1491 | msleep(1); |
| 1492 | |
| 1493 | for (i = dc->index_start; i < dc->index_start + MAX_PORT; ++i) |
| 1494 | tty_unregister_device(ntty_driver, i); |
| 1495 | } |
| 1496 | |
| 1497 | /* Deallocate memory for one device */ |
| 1498 | static void __devexit nozomi_card_exit(struct pci_dev *pdev) |
| 1499 | { |
| 1500 | int i; |
| 1501 | struct ctrl_ul ctrl; |
| 1502 | struct nozomi *dc = pci_get_drvdata(pdev); |
| 1503 | |
| 1504 | /* Disable all interrupts */ |
| 1505 | dc->last_ier = 0; |
| 1506 | writew(dc->last_ier, dc->reg_ier); |
| 1507 | |
| 1508 | tty_exit(dc); |
| 1509 | |
| 1510 | /* Send 0x0001, command card to resend the reset token. */ |
| 1511 | /* This is to get the reset when the module is reloaded. */ |
| 1512 | ctrl.port = 0x00; |
| 1513 | ctrl.reserved = 0; |
| 1514 | ctrl.RTS = 0; |
| 1515 | ctrl.DTR = 1; |
| 1516 | DBG1("sending flow control 0x%04X", *((u16 *)&ctrl)); |
| 1517 | |
| 1518 | /* Setup dc->reg addresses to we can use defines here */ |
| 1519 | write_mem32(dc->port[PORT_CTRL].ul_addr[0], (u32 *)&ctrl, 2); |
| 1520 | writew(CTRL_UL, dc->reg_fcr); /* push the token to the card. */ |
| 1521 | |
| 1522 | remove_sysfs_files(dc); |
| 1523 | |
| 1524 | free_irq(pdev->irq, dc); |
| 1525 | |
| 1526 | for (i = 0; i < MAX_PORT; i++) |
| 1527 | if (dc->port[i].fifo_ul) |
| 1528 | kfifo_free(dc->port[i].fifo_ul); |
| 1529 | |
| 1530 | kfree(dc->send_buf); |
| 1531 | |
| 1532 | iounmap(dc->base_addr); |
| 1533 | |
| 1534 | pci_release_regions(pdev); |
| 1535 | |
| 1536 | pci_disable_device(pdev); |
| 1537 | |
| 1538 | ndevs[dc->index_start / MAX_PORT] = NULL; |
| 1539 | |
| 1540 | kfree(dc); |
| 1541 | } |
| 1542 | |
| 1543 | static void set_rts(const struct tty_struct *tty, int rts) |
| 1544 | { |
| 1545 | struct port *port = get_port_by_tty(tty); |
| 1546 | |
| 1547 | port->ctrl_ul.RTS = rts; |
| 1548 | port->update_flow_control = 1; |
| 1549 | enable_transmit_ul(PORT_CTRL, get_dc_by_tty(tty)); |
| 1550 | } |
| 1551 | |
| 1552 | static void set_dtr(const struct tty_struct *tty, int dtr) |
| 1553 | { |
| 1554 | struct port *port = get_port_by_tty(tty); |
| 1555 | |
| 1556 | DBG1("SETTING DTR index: %d, dtr: %d", tty->index, dtr); |
| 1557 | |
| 1558 | port->ctrl_ul.DTR = dtr; |
| 1559 | port->update_flow_control = 1; |
| 1560 | enable_transmit_ul(PORT_CTRL, get_dc_by_tty(tty)); |
| 1561 | } |
| 1562 | |
| 1563 | /* |
| 1564 | * ---------------------------------------------------------------------------- |
| 1565 | * TTY code |
| 1566 | * ---------------------------------------------------------------------------- |
| 1567 | */ |
| 1568 | |
| 1569 | /* Called when the userspace process opens the tty, /dev/noz*. */ |
| 1570 | static int ntty_open(struct tty_struct *tty, struct file *file) |
| 1571 | { |
| 1572 | struct port *port = get_port_by_tty(tty); |
| 1573 | struct nozomi *dc = get_dc_by_tty(tty); |
| 1574 | unsigned long flags; |
| 1575 | |
Frank Seidel | 661b4e8 | 2008-03-06 21:45:57 +0100 | [diff] [blame] | 1576 | if (!port || !dc || dc->state != NOZOMI_STATE_READY) |
Frank Seidel | 20fd1e3 | 2007-11-09 14:49:23 +0100 | [diff] [blame] | 1577 | return -ENODEV; |
| 1578 | |
| 1579 | if (mutex_lock_interruptible(&port->tty_sem)) |
| 1580 | return -ERESTARTSYS; |
| 1581 | |
| 1582 | port->tty_open_count++; |
| 1583 | dc->open_ttys++; |
| 1584 | |
| 1585 | /* Enable interrupt downlink for channel */ |
| 1586 | if (port->tty_open_count == 1) { |
| 1587 | tty->low_latency = 1; |
| 1588 | tty->driver_data = port; |
| 1589 | port->tty = tty; |
| 1590 | DBG1("open: %d", port->token_dl); |
| 1591 | spin_lock_irqsave(&dc->spin_mutex, flags); |
| 1592 | dc->last_ier = dc->last_ier | port->token_dl; |
| 1593 | writew(dc->last_ier, dc->reg_ier); |
| 1594 | spin_unlock_irqrestore(&dc->spin_mutex, flags); |
| 1595 | } |
| 1596 | |
| 1597 | mutex_unlock(&port->tty_sem); |
| 1598 | |
| 1599 | return 0; |
| 1600 | } |
| 1601 | |
| 1602 | /* Called when the userspace process close the tty, /dev/noz*. */ |
| 1603 | static void ntty_close(struct tty_struct *tty, struct file *file) |
| 1604 | { |
| 1605 | struct nozomi *dc = get_dc_by_tty(tty); |
| 1606 | struct port *port = tty->driver_data; |
| 1607 | unsigned long flags; |
| 1608 | |
| 1609 | if (!dc || !port) |
| 1610 | return; |
| 1611 | |
| 1612 | if (mutex_lock_interruptible(&port->tty_sem)) |
| 1613 | return; |
| 1614 | |
| 1615 | if (!port->tty_open_count) |
| 1616 | goto exit; |
| 1617 | |
| 1618 | dc->open_ttys--; |
| 1619 | port->tty_open_count--; |
| 1620 | |
| 1621 | if (port->tty_open_count == 0) { |
| 1622 | DBG1("close: %d", port->token_dl); |
| 1623 | spin_lock_irqsave(&dc->spin_mutex, flags); |
| 1624 | dc->last_ier &= ~(port->token_dl); |
| 1625 | writew(dc->last_ier, dc->reg_ier); |
| 1626 | spin_unlock_irqrestore(&dc->spin_mutex, flags); |
| 1627 | } |
| 1628 | |
| 1629 | exit: |
| 1630 | mutex_unlock(&port->tty_sem); |
| 1631 | } |
| 1632 | |
| 1633 | /* |
| 1634 | * called when the userspace process writes to the tty (/dev/noz*). |
| 1635 | * Data is inserted into a fifo, which is then read and transfered to the modem. |
| 1636 | */ |
| 1637 | static int ntty_write(struct tty_struct *tty, const unsigned char *buffer, |
| 1638 | int count) |
| 1639 | { |
| 1640 | int rval = -EINVAL; |
| 1641 | struct nozomi *dc = get_dc_by_tty(tty); |
| 1642 | struct port *port = tty->driver_data; |
| 1643 | unsigned long flags; |
| 1644 | |
| 1645 | /* DBG1( "WRITEx: %d, index = %d", count, index); */ |
| 1646 | |
| 1647 | if (!dc || !port) |
| 1648 | return -ENODEV; |
| 1649 | |
| 1650 | if (unlikely(!mutex_trylock(&port->tty_sem))) { |
| 1651 | /* |
| 1652 | * must test lock as tty layer wraps calls |
| 1653 | * to this function with BKL |
| 1654 | */ |
| 1655 | dev_err(&dc->pdev->dev, "Would have deadlocked - " |
| 1656 | "return EAGAIN\n"); |
| 1657 | return -EAGAIN; |
| 1658 | } |
| 1659 | |
| 1660 | if (unlikely(!port->tty_open_count)) { |
| 1661 | DBG1(" "); |
| 1662 | goto exit; |
| 1663 | } |
| 1664 | |
| 1665 | rval = __kfifo_put(port->fifo_ul, (unsigned char *)buffer, count); |
| 1666 | |
| 1667 | /* notify card */ |
| 1668 | if (unlikely(dc == NULL)) { |
| 1669 | DBG1("No device context?"); |
| 1670 | goto exit; |
| 1671 | } |
| 1672 | |
| 1673 | spin_lock_irqsave(&dc->spin_mutex, flags); |
| 1674 | /* CTS is only valid on the modem channel */ |
| 1675 | if (port == &(dc->port[PORT_MDM])) { |
| 1676 | if (port->ctrl_dl.CTS) { |
| 1677 | DBG4("Enable interrupt"); |
| 1678 | enable_transmit_ul(tty->index % MAX_PORT, dc); |
| 1679 | } else { |
| 1680 | dev_err(&dc->pdev->dev, |
| 1681 | "CTS not active on modem port?\n"); |
| 1682 | } |
| 1683 | } else { |
| 1684 | enable_transmit_ul(tty->index % MAX_PORT, dc); |
| 1685 | } |
| 1686 | spin_unlock_irqrestore(&dc->spin_mutex, flags); |
| 1687 | |
| 1688 | exit: |
| 1689 | mutex_unlock(&port->tty_sem); |
| 1690 | return rval; |
| 1691 | } |
| 1692 | |
| 1693 | /* |
| 1694 | * Calculate how much is left in device |
| 1695 | * This method is called by the upper tty layer. |
| 1696 | * #according to sources N_TTY.c it expects a value >= 0 and |
| 1697 | * does not check for negative values. |
| 1698 | */ |
| 1699 | static int ntty_write_room(struct tty_struct *tty) |
| 1700 | { |
| 1701 | struct port *port = tty->driver_data; |
| 1702 | int room = 0; |
Jan Engelhardt | 71e1b4a | 2008-02-01 09:13:53 +0100 | [diff] [blame] | 1703 | const struct nozomi *dc = get_dc_by_tty(tty); |
Frank Seidel | 20fd1e3 | 2007-11-09 14:49:23 +0100 | [diff] [blame] | 1704 | |
| 1705 | if (!dc || !port) |
| 1706 | return 0; |
| 1707 | if (!mutex_trylock(&port->tty_sem)) |
| 1708 | return 0; |
| 1709 | |
| 1710 | if (!port->tty_open_count) |
| 1711 | goto exit; |
| 1712 | |
| 1713 | room = port->fifo_ul->size - __kfifo_len(port->fifo_ul); |
| 1714 | |
| 1715 | exit: |
| 1716 | mutex_unlock(&port->tty_sem); |
| 1717 | return room; |
| 1718 | } |
| 1719 | |
| 1720 | /* Gets io control parameters */ |
| 1721 | static int ntty_tiocmget(struct tty_struct *tty, struct file *file) |
| 1722 | { |
Jan Engelhardt | 71e1b4a | 2008-02-01 09:13:53 +0100 | [diff] [blame] | 1723 | const struct port *port = tty->driver_data; |
| 1724 | const struct ctrl_dl *ctrl_dl = &port->ctrl_dl; |
| 1725 | const struct ctrl_ul *ctrl_ul = &port->ctrl_ul; |
Frank Seidel | 20fd1e3 | 2007-11-09 14:49:23 +0100 | [diff] [blame] | 1726 | |
Alan Cox | 978e595 | 2008-04-30 00:53:59 -0700 | [diff] [blame] | 1727 | /* Note: these could change under us but it is not clear this |
| 1728 | matters if so */ |
Frank Seidel | 20fd1e3 | 2007-11-09 14:49:23 +0100 | [diff] [blame] | 1729 | return (ctrl_ul->RTS ? TIOCM_RTS : 0) | |
| 1730 | (ctrl_ul->DTR ? TIOCM_DTR : 0) | |
| 1731 | (ctrl_dl->DCD ? TIOCM_CAR : 0) | |
| 1732 | (ctrl_dl->RI ? TIOCM_RNG : 0) | |
| 1733 | (ctrl_dl->DSR ? TIOCM_DSR : 0) | |
| 1734 | (ctrl_dl->CTS ? TIOCM_CTS : 0); |
| 1735 | } |
| 1736 | |
| 1737 | /* Sets io controls parameters */ |
| 1738 | static int ntty_tiocmset(struct tty_struct *tty, struct file *file, |
| 1739 | unsigned int set, unsigned int clear) |
| 1740 | { |
Frank Seidel | 661b4e8 | 2008-03-06 21:45:57 +0100 | [diff] [blame] | 1741 | struct nozomi *dc = get_dc_by_tty(tty); |
| 1742 | unsigned long flags; |
| 1743 | |
| 1744 | spin_lock_irqsave(&dc->spin_mutex, flags); |
Frank Seidel | 20fd1e3 | 2007-11-09 14:49:23 +0100 | [diff] [blame] | 1745 | if (set & TIOCM_RTS) |
| 1746 | set_rts(tty, 1); |
| 1747 | else if (clear & TIOCM_RTS) |
| 1748 | set_rts(tty, 0); |
| 1749 | |
| 1750 | if (set & TIOCM_DTR) |
| 1751 | set_dtr(tty, 1); |
| 1752 | else if (clear & TIOCM_DTR) |
| 1753 | set_dtr(tty, 0); |
Frank Seidel | 661b4e8 | 2008-03-06 21:45:57 +0100 | [diff] [blame] | 1754 | spin_unlock_irqrestore(&dc->spin_mutex, flags); |
Frank Seidel | 20fd1e3 | 2007-11-09 14:49:23 +0100 | [diff] [blame] | 1755 | |
| 1756 | return 0; |
| 1757 | } |
| 1758 | |
| 1759 | static int ntty_cflags_changed(struct port *port, unsigned long flags, |
| 1760 | struct async_icount *cprev) |
| 1761 | { |
Frank Seidel | 18bbe0c2 | 2008-02-01 09:14:05 +0100 | [diff] [blame] | 1762 | const struct async_icount cnow = port->tty_icount; |
Frank Seidel | 20fd1e3 | 2007-11-09 14:49:23 +0100 | [diff] [blame] | 1763 | int ret; |
| 1764 | |
| 1765 | ret = ((flags & TIOCM_RNG) && (cnow.rng != cprev->rng)) || |
| 1766 | ((flags & TIOCM_DSR) && (cnow.dsr != cprev->dsr)) || |
| 1767 | ((flags & TIOCM_CD) && (cnow.dcd != cprev->dcd)) || |
| 1768 | ((flags & TIOCM_CTS) && (cnow.cts != cprev->cts)); |
| 1769 | |
| 1770 | *cprev = cnow; |
| 1771 | |
| 1772 | return ret; |
| 1773 | } |
| 1774 | |
| 1775 | static int ntty_ioctl_tiocgicount(struct port *port, void __user *argp) |
| 1776 | { |
Frank Seidel | 18bbe0c2 | 2008-02-01 09:14:05 +0100 | [diff] [blame] | 1777 | const struct async_icount cnow = port->tty_icount; |
Frank Seidel | 20fd1e3 | 2007-11-09 14:49:23 +0100 | [diff] [blame] | 1778 | struct serial_icounter_struct icount; |
| 1779 | |
| 1780 | icount.cts = cnow.cts; |
| 1781 | icount.dsr = cnow.dsr; |
| 1782 | icount.rng = cnow.rng; |
| 1783 | icount.dcd = cnow.dcd; |
| 1784 | icount.rx = cnow.rx; |
| 1785 | icount.tx = cnow.tx; |
| 1786 | icount.frame = cnow.frame; |
| 1787 | icount.overrun = cnow.overrun; |
| 1788 | icount.parity = cnow.parity; |
| 1789 | icount.brk = cnow.brk; |
| 1790 | icount.buf_overrun = cnow.buf_overrun; |
| 1791 | |
Frank Seidel | 661b4e8 | 2008-03-06 21:45:57 +0100 | [diff] [blame] | 1792 | return copy_to_user(argp, &icount, sizeof(icount)) ? -EFAULT : 0; |
Frank Seidel | 20fd1e3 | 2007-11-09 14:49:23 +0100 | [diff] [blame] | 1793 | } |
| 1794 | |
| 1795 | static int ntty_ioctl(struct tty_struct *tty, struct file *file, |
| 1796 | unsigned int cmd, unsigned long arg) |
| 1797 | { |
| 1798 | struct port *port = tty->driver_data; |
| 1799 | void __user *argp = (void __user *)arg; |
| 1800 | int rval = -ENOIOCTLCMD; |
| 1801 | |
| 1802 | DBG1("******** IOCTL, cmd: %d", cmd); |
| 1803 | |
| 1804 | switch (cmd) { |
| 1805 | case TIOCMIWAIT: { |
| 1806 | struct async_icount cprev = port->tty_icount; |
| 1807 | |
| 1808 | rval = wait_event_interruptible(port->tty_wait, |
| 1809 | ntty_cflags_changed(port, arg, &cprev)); |
| 1810 | break; |
| 1811 | } case TIOCGICOUNT: |
| 1812 | rval = ntty_ioctl_tiocgicount(port, argp); |
| 1813 | break; |
| 1814 | default: |
| 1815 | DBG1("ERR: 0x%08X, %d", cmd, cmd); |
| 1816 | break; |
| 1817 | }; |
| 1818 | |
| 1819 | return rval; |
| 1820 | } |
| 1821 | |
| 1822 | /* |
| 1823 | * Called by the upper tty layer when tty buffers are ready |
| 1824 | * to receive data again after a call to throttle. |
| 1825 | */ |
| 1826 | static void ntty_unthrottle(struct tty_struct *tty) |
| 1827 | { |
| 1828 | struct nozomi *dc = get_dc_by_tty(tty); |
| 1829 | unsigned long flags; |
| 1830 | |
| 1831 | DBG1("UNTHROTTLE"); |
| 1832 | spin_lock_irqsave(&dc->spin_mutex, flags); |
| 1833 | enable_transmit_dl(tty->index % MAX_PORT, dc); |
| 1834 | set_rts(tty, 1); |
| 1835 | |
| 1836 | spin_unlock_irqrestore(&dc->spin_mutex, flags); |
| 1837 | } |
| 1838 | |
| 1839 | /* |
| 1840 | * Called by the upper tty layer when the tty buffers are almost full. |
| 1841 | * The driver should stop send more data. |
| 1842 | */ |
| 1843 | static void ntty_throttle(struct tty_struct *tty) |
| 1844 | { |
| 1845 | struct nozomi *dc = get_dc_by_tty(tty); |
| 1846 | unsigned long flags; |
| 1847 | |
| 1848 | DBG1("THROTTLE"); |
| 1849 | spin_lock_irqsave(&dc->spin_mutex, flags); |
| 1850 | set_rts(tty, 0); |
| 1851 | spin_unlock_irqrestore(&dc->spin_mutex, flags); |
| 1852 | } |
| 1853 | |
Frank Seidel | 20fd1e3 | 2007-11-09 14:49:23 +0100 | [diff] [blame] | 1854 | /* Returns number of chars in buffer, called by tty layer */ |
| 1855 | static s32 ntty_chars_in_buffer(struct tty_struct *tty) |
| 1856 | { |
| 1857 | struct port *port = tty->driver_data; |
| 1858 | struct nozomi *dc = get_dc_by_tty(tty); |
| 1859 | s32 rval; |
| 1860 | |
| 1861 | if (unlikely(!dc || !port)) { |
| 1862 | rval = -ENODEV; |
| 1863 | goto exit_in_buffer; |
| 1864 | } |
| 1865 | |
| 1866 | if (unlikely(!port->tty_open_count)) { |
| 1867 | dev_err(&dc->pdev->dev, "No tty open?\n"); |
| 1868 | rval = -ENODEV; |
| 1869 | goto exit_in_buffer; |
| 1870 | } |
| 1871 | |
| 1872 | rval = __kfifo_len(port->fifo_ul); |
| 1873 | |
| 1874 | exit_in_buffer: |
| 1875 | return rval; |
| 1876 | } |
| 1877 | |
Frank Seidel | 18bbe0c2 | 2008-02-01 09:14:05 +0100 | [diff] [blame] | 1878 | static const struct tty_operations tty_ops = { |
Frank Seidel | 20fd1e3 | 2007-11-09 14:49:23 +0100 | [diff] [blame] | 1879 | .ioctl = ntty_ioctl, |
| 1880 | .open = ntty_open, |
| 1881 | .close = ntty_close, |
| 1882 | .write = ntty_write, |
| 1883 | .write_room = ntty_write_room, |
| 1884 | .unthrottle = ntty_unthrottle, |
| 1885 | .throttle = ntty_throttle, |
| 1886 | .chars_in_buffer = ntty_chars_in_buffer, |
Frank Seidel | 20fd1e3 | 2007-11-09 14:49:23 +0100 | [diff] [blame] | 1887 | .tiocmget = ntty_tiocmget, |
| 1888 | .tiocmset = ntty_tiocmset, |
| 1889 | }; |
| 1890 | |
| 1891 | /* Module initialization */ |
| 1892 | static struct pci_driver nozomi_driver = { |
| 1893 | .name = NOZOMI_NAME, |
| 1894 | .id_table = nozomi_pci_tbl, |
| 1895 | .probe = nozomi_card_init, |
| 1896 | .remove = __devexit_p(nozomi_card_exit), |
| 1897 | }; |
| 1898 | |
| 1899 | static __init int nozomi_init(void) |
| 1900 | { |
| 1901 | int ret; |
| 1902 | |
| 1903 | printk(KERN_INFO "Initializing %s\n", VERSION_STRING); |
| 1904 | |
| 1905 | ntty_driver = alloc_tty_driver(NTTY_TTY_MAXMINORS); |
| 1906 | if (!ntty_driver) |
| 1907 | return -ENOMEM; |
| 1908 | |
| 1909 | ntty_driver->owner = THIS_MODULE; |
| 1910 | ntty_driver->driver_name = NOZOMI_NAME_TTY; |
| 1911 | ntty_driver->name = "noz"; |
| 1912 | ntty_driver->major = 0; |
| 1913 | ntty_driver->type = TTY_DRIVER_TYPE_SERIAL; |
| 1914 | ntty_driver->subtype = SERIAL_TYPE_NORMAL; |
| 1915 | ntty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; |
| 1916 | ntty_driver->init_termios = tty_std_termios; |
| 1917 | ntty_driver->init_termios.c_cflag = B115200 | CS8 | CREAD | \ |
| 1918 | HUPCL | CLOCAL; |
| 1919 | ntty_driver->init_termios.c_ispeed = 115200; |
| 1920 | ntty_driver->init_termios.c_ospeed = 115200; |
| 1921 | tty_set_operations(ntty_driver, &tty_ops); |
| 1922 | |
| 1923 | ret = tty_register_driver(ntty_driver); |
| 1924 | if (ret) { |
| 1925 | printk(KERN_ERR "Nozomi: failed to register ntty driver\n"); |
| 1926 | goto free_tty; |
| 1927 | } |
| 1928 | |
| 1929 | ret = pci_register_driver(&nozomi_driver); |
| 1930 | if (ret) { |
| 1931 | printk(KERN_ERR "Nozomi: can't register pci driver\n"); |
| 1932 | goto unr_tty; |
| 1933 | } |
| 1934 | |
| 1935 | return 0; |
| 1936 | unr_tty: |
| 1937 | tty_unregister_driver(ntty_driver); |
| 1938 | free_tty: |
| 1939 | put_tty_driver(ntty_driver); |
| 1940 | return ret; |
| 1941 | } |
| 1942 | |
| 1943 | static __exit void nozomi_exit(void) |
| 1944 | { |
| 1945 | printk(KERN_INFO "Unloading %s\n", DRIVER_DESC); |
| 1946 | pci_unregister_driver(&nozomi_driver); |
| 1947 | tty_unregister_driver(ntty_driver); |
| 1948 | put_tty_driver(ntty_driver); |
| 1949 | } |
| 1950 | |
| 1951 | module_init(nozomi_init); |
| 1952 | module_exit(nozomi_exit); |
| 1953 | |
| 1954 | module_param(debug, int, S_IRUGO | S_IWUSR); |
| 1955 | |
| 1956 | MODULE_LICENSE("Dual BSD/GPL"); |
| 1957 | MODULE_DESCRIPTION(DRIVER_DESC); |