Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * drivers/char/vme_scc.c: MVME147, MVME162, BVME6000 SCC serial ports |
| 3 | * implementation. |
| 4 | * Copyright 1999 Richard Hirst <richard@sleepie.demon.co.uk> |
| 5 | * |
| 6 | * Based on atari_SCC.c which was |
| 7 | * Copyright 1994-95 Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de> |
| 8 | * Partially based on PC-Linux serial.c by Linus Torvalds and Theodore Ts'o |
| 9 | * |
| 10 | * This file is subject to the terms and conditions of the GNU General Public |
| 11 | * License. See the file COPYING in the main directory of this archive |
| 12 | * for more details. |
| 13 | * |
| 14 | */ |
| 15 | |
| 16 | #include <linux/module.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | #include <linux/kdev_t.h> |
| 18 | #include <asm/io.h> |
| 19 | #include <linux/kernel.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | #include <linux/ioport.h> |
| 21 | #include <linux/interrupt.h> |
| 22 | #include <linux/errno.h> |
| 23 | #include <linux/tty.h> |
| 24 | #include <linux/tty_flip.h> |
| 25 | #include <linux/mm.h> |
| 26 | #include <linux/serial.h> |
| 27 | #include <linux/fcntl.h> |
| 28 | #include <linux/major.h> |
| 29 | #include <linux/delay.h> |
| 30 | #include <linux/slab.h> |
| 31 | #include <linux/miscdevice.h> |
| 32 | #include <linux/console.h> |
| 33 | #include <linux/init.h> |
| 34 | #include <asm/setup.h> |
| 35 | #include <asm/bootinfo.h> |
| 36 | |
| 37 | #ifdef CONFIG_MVME147_SCC |
| 38 | #include <asm/mvme147hw.h> |
| 39 | #endif |
| 40 | #ifdef CONFIG_MVME162_SCC |
| 41 | #include <asm/mvme16xhw.h> |
| 42 | #endif |
| 43 | #ifdef CONFIG_BVME6000_SCC |
| 44 | #include <asm/bvme6000hw.h> |
| 45 | #endif |
| 46 | |
| 47 | #include <linux/generic_serial.h> |
| 48 | #include "scc.h" |
| 49 | |
| 50 | |
| 51 | #define CHANNEL_A 0 |
| 52 | #define CHANNEL_B 1 |
| 53 | |
| 54 | #define SCC_MINOR_BASE 64 |
| 55 | |
| 56 | /* Shadows for all SCC write registers */ |
| 57 | static unsigned char scc_shadow[2][16]; |
| 58 | |
| 59 | /* Location to access for SCC register access delay */ |
| 60 | static volatile unsigned char *scc_del = NULL; |
| 61 | |
| 62 | /* To keep track of STATUS_REG state for detection of Ext/Status int source */ |
| 63 | static unsigned char scc_last_status_reg[2]; |
| 64 | |
| 65 | /***************************** Prototypes *****************************/ |
| 66 | |
| 67 | /* Function prototypes */ |
| 68 | static void scc_disable_tx_interrupts(void * ptr); |
| 69 | static void scc_enable_tx_interrupts(void * ptr); |
| 70 | static void scc_disable_rx_interrupts(void * ptr); |
| 71 | static void scc_enable_rx_interrupts(void * ptr); |
Alan Cox | 31f3593 | 2009-01-02 13:45:05 +0000 | [diff] [blame] | 72 | static int scc_carrier_raised(struct tty_port *port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | static void scc_shutdown_port(void * ptr); |
| 74 | static int scc_set_real_termios(void *ptr); |
| 75 | static void scc_hungup(void *ptr); |
| 76 | static void scc_close(void *ptr); |
| 77 | static int scc_chars_in_buffer(void * ptr); |
| 78 | static int scc_open(struct tty_struct * tty, struct file * filp); |
| 79 | static int scc_ioctl(struct tty_struct * tty, struct file * filp, |
| 80 | unsigned int cmd, unsigned long arg); |
| 81 | static void scc_throttle(struct tty_struct *tty); |
| 82 | static void scc_unthrottle(struct tty_struct *tty); |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 83 | static irqreturn_t scc_tx_int(int irq, void *data); |
| 84 | static irqreturn_t scc_rx_int(int irq, void *data); |
| 85 | static irqreturn_t scc_stat_int(int irq, void *data); |
| 86 | static irqreturn_t scc_spcond_int(int irq, void *data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | static void scc_setsignals(struct scc_port *port, int dtr, int rts); |
Alan Cox | 9e98966 | 2008-07-22 11:18:03 +0100 | [diff] [blame] | 88 | static int scc_break_ctl(struct tty_struct *tty, int break_state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | |
| 90 | static struct tty_driver *scc_driver; |
| 91 | |
Geert Uytterhoeven | eb4db45 | 2008-05-18 20:47:11 +0200 | [diff] [blame] | 92 | static struct scc_port scc_ports[2]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | |
| 94 | /*--------------------------------------------------------------------------- |
| 95 | * Interface from generic_serial.c back here |
| 96 | *--------------------------------------------------------------------------*/ |
| 97 | |
| 98 | static struct real_driver scc_real_driver = { |
| 99 | scc_disable_tx_interrupts, |
| 100 | scc_enable_tx_interrupts, |
| 101 | scc_disable_rx_interrupts, |
| 102 | scc_enable_rx_interrupts, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | scc_shutdown_port, |
| 104 | scc_set_real_termios, |
| 105 | scc_chars_in_buffer, |
| 106 | scc_close, |
| 107 | scc_hungup, |
| 108 | NULL |
| 109 | }; |
| 110 | |
| 111 | |
Jeff Dike | b68e31d | 2006-10-02 02:17:18 -0700 | [diff] [blame] | 112 | static const struct tty_operations scc_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | .open = scc_open, |
| 114 | .close = gs_close, |
| 115 | .write = gs_write, |
| 116 | .put_char = gs_put_char, |
| 117 | .flush_chars = gs_flush_chars, |
| 118 | .write_room = gs_write_room, |
| 119 | .chars_in_buffer = gs_chars_in_buffer, |
| 120 | .flush_buffer = gs_flush_buffer, |
| 121 | .ioctl = scc_ioctl, |
| 122 | .throttle = scc_throttle, |
| 123 | .unthrottle = scc_unthrottle, |
| 124 | .set_termios = gs_set_termios, |
| 125 | .stop = gs_stop, |
| 126 | .start = gs_start, |
| 127 | .hangup = gs_hangup, |
| 128 | .break_ctl = scc_break_ctl, |
| 129 | }; |
| 130 | |
Alan Cox | 31f3593 | 2009-01-02 13:45:05 +0000 | [diff] [blame] | 131 | static const struct tty_port_operations scc_port_ops = { |
| 132 | .carrier_raised = scc_carrier_raised, |
| 133 | }; |
| 134 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 135 | /*---------------------------------------------------------------------------- |
| 136 | * vme_scc_init() and support functions |
| 137 | *---------------------------------------------------------------------------*/ |
| 138 | |
Peter Huewe | eb054e3 | 2009-08-20 22:42:31 +0200 | [diff] [blame^] | 139 | static int __init scc_init_drivers(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | { |
| 141 | int error; |
| 142 | |
| 143 | scc_driver = alloc_tty_driver(2); |
| 144 | if (!scc_driver) |
| 145 | return -ENOMEM; |
| 146 | scc_driver->owner = THIS_MODULE; |
| 147 | scc_driver->driver_name = "scc"; |
| 148 | scc_driver->name = "ttyS"; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | scc_driver->major = TTY_MAJOR; |
| 150 | scc_driver->minor_start = SCC_MINOR_BASE; |
| 151 | scc_driver->type = TTY_DRIVER_TYPE_SERIAL; |
| 152 | scc_driver->subtype = SERIAL_TYPE_NORMAL; |
| 153 | scc_driver->init_termios = tty_std_termios; |
| 154 | scc_driver->init_termios.c_cflag = |
| 155 | B9600 | CS8 | CREAD | HUPCL | CLOCAL; |
Alan Cox | 606d099 | 2006-12-08 02:38:45 -0800 | [diff] [blame] | 156 | scc_driver->init_termios.c_ispeed = 9600; |
| 157 | scc_driver->init_termios.c_ospeed = 9600; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | scc_driver->flags = TTY_DRIVER_REAL_RAW; |
| 159 | tty_set_operations(scc_driver, &scc_ops); |
| 160 | |
| 161 | if ((error = tty_register_driver(scc_driver))) { |
| 162 | printk(KERN_ERR "scc: Couldn't register scc driver, error = %d\n", |
| 163 | error); |
| 164 | put_tty_driver(scc_driver); |
| 165 | return 1; |
| 166 | } |
| 167 | |
| 168 | return 0; |
| 169 | } |
| 170 | |
| 171 | |
| 172 | /* ports[] array is indexed by line no (i.e. [0] for ttyS0, [1] for ttyS1). |
| 173 | */ |
| 174 | |
Peter Huewe | eb054e3 | 2009-08-20 22:42:31 +0200 | [diff] [blame^] | 175 | static void __init scc_init_portstructs(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | { |
| 177 | struct scc_port *port; |
| 178 | int i; |
| 179 | |
| 180 | for (i = 0; i < 2; i++) { |
| 181 | port = scc_ports + i; |
Alan Cox | 31f3593 | 2009-01-02 13:45:05 +0000 | [diff] [blame] | 182 | tty_port_init(&port->gs.port); |
| 183 | port->gs.port.ops = &scc_port_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 184 | port->gs.magic = SCC_MAGIC; |
| 185 | port->gs.close_delay = HZ/2; |
| 186 | port->gs.closing_wait = 30 * HZ; |
| 187 | port->gs.rd = &scc_real_driver; |
| 188 | #ifdef NEW_WRITE_LOCKING |
Ingo Molnar | 81861d7 | 2006-03-23 03:00:44 -0800 | [diff] [blame] | 189 | port->gs.port_write_mutex = MUTEX; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | #endif |
Geert Uytterhoeven | 732730d | 2008-07-27 01:39:52 +0200 | [diff] [blame] | 191 | init_waitqueue_head(&port->gs.port.open_wait); |
| 192 | init_waitqueue_head(&port->gs.port.close_wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | } |
| 194 | } |
| 195 | |
| 196 | |
| 197 | #ifdef CONFIG_MVME147_SCC |
Peter Huewe | eb054e3 | 2009-08-20 22:42:31 +0200 | [diff] [blame^] | 198 | static int __init mvme147_scc_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 199 | { |
| 200 | struct scc_port *port; |
Geert Uytterhoeven | c36a4e4 | 2008-12-30 14:07:07 +0100 | [diff] [blame] | 201 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | |
| 203 | printk(KERN_INFO "SCC: MVME147 Serial Driver\n"); |
| 204 | /* Init channel A */ |
| 205 | port = &scc_ports[0]; |
| 206 | port->channel = CHANNEL_A; |
| 207 | port->ctrlp = (volatile unsigned char *)M147_SCC_A_ADDR; |
| 208 | port->datap = port->ctrlp + 1; |
| 209 | port->port_a = &scc_ports[0]; |
| 210 | port->port_b = &scc_ports[1]; |
Geert Uytterhoeven | c36a4e4 | 2008-12-30 14:07:07 +0100 | [diff] [blame] | 211 | error = request_irq(MVME147_IRQ_SCCA_TX, scc_tx_int, IRQF_DISABLED, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 212 | "SCC-A TX", port); |
Geert Uytterhoeven | c36a4e4 | 2008-12-30 14:07:07 +0100 | [diff] [blame] | 213 | if (error) |
| 214 | goto fail; |
| 215 | error = request_irq(MVME147_IRQ_SCCA_STAT, scc_stat_int, IRQF_DISABLED, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 216 | "SCC-A status", port); |
Geert Uytterhoeven | c36a4e4 | 2008-12-30 14:07:07 +0100 | [diff] [blame] | 217 | if (error) |
| 218 | goto fail_free_a_tx; |
| 219 | error = request_irq(MVME147_IRQ_SCCA_RX, scc_rx_int, IRQF_DISABLED, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 220 | "SCC-A RX", port); |
Geert Uytterhoeven | c36a4e4 | 2008-12-30 14:07:07 +0100 | [diff] [blame] | 221 | if (error) |
| 222 | goto fail_free_a_stat; |
| 223 | error = request_irq(MVME147_IRQ_SCCA_SPCOND, scc_spcond_int, |
| 224 | IRQF_DISABLED, "SCC-A special cond", port); |
| 225 | if (error) |
| 226 | goto fail_free_a_rx; |
| 227 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | { |
| 229 | SCC_ACCESS_INIT(port); |
| 230 | |
| 231 | /* disable interrupts for this channel */ |
| 232 | SCCwrite(INT_AND_DMA_REG, 0); |
| 233 | /* Set the interrupt vector */ |
| 234 | SCCwrite(INT_VECTOR_REG, MVME147_IRQ_SCC_BASE); |
| 235 | /* Interrupt parameters: vector includes status, status low */ |
| 236 | SCCwrite(MASTER_INT_CTRL, MIC_VEC_INCL_STAT); |
| 237 | SCCmod(MASTER_INT_CTRL, 0xff, MIC_MASTER_INT_ENAB); |
| 238 | } |
| 239 | |
| 240 | /* Init channel B */ |
| 241 | port = &scc_ports[1]; |
| 242 | port->channel = CHANNEL_B; |
| 243 | port->ctrlp = (volatile unsigned char *)M147_SCC_B_ADDR; |
| 244 | port->datap = port->ctrlp + 1; |
| 245 | port->port_a = &scc_ports[0]; |
| 246 | port->port_b = &scc_ports[1]; |
Geert Uytterhoeven | c36a4e4 | 2008-12-30 14:07:07 +0100 | [diff] [blame] | 247 | error = request_irq(MVME147_IRQ_SCCB_TX, scc_tx_int, IRQF_DISABLED, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | "SCC-B TX", port); |
Geert Uytterhoeven | c36a4e4 | 2008-12-30 14:07:07 +0100 | [diff] [blame] | 249 | if (error) |
| 250 | goto fail_free_a_spcond; |
| 251 | error = request_irq(MVME147_IRQ_SCCB_STAT, scc_stat_int, IRQF_DISABLED, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | "SCC-B status", port); |
Geert Uytterhoeven | c36a4e4 | 2008-12-30 14:07:07 +0100 | [diff] [blame] | 253 | if (error) |
| 254 | goto fail_free_b_tx; |
| 255 | error = request_irq(MVME147_IRQ_SCCB_RX, scc_rx_int, IRQF_DISABLED, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | "SCC-B RX", port); |
Geert Uytterhoeven | c36a4e4 | 2008-12-30 14:07:07 +0100 | [diff] [blame] | 257 | if (error) |
| 258 | goto fail_free_b_stat; |
| 259 | error = request_irq(MVME147_IRQ_SCCB_SPCOND, scc_spcond_int, |
| 260 | IRQF_DISABLED, "SCC-B special cond", port); |
| 261 | if (error) |
| 262 | goto fail_free_b_rx; |
| 263 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 264 | { |
| 265 | SCC_ACCESS_INIT(port); |
| 266 | |
| 267 | /* disable interrupts for this channel */ |
| 268 | SCCwrite(INT_AND_DMA_REG, 0); |
| 269 | } |
| 270 | |
| 271 | /* Ensure interrupts are enabled in the PCC chip */ |
| 272 | m147_pcc->serial_cntrl=PCC_LEVEL_SERIAL|PCC_INT_ENAB; |
| 273 | |
| 274 | /* Initialise the tty driver structures and register */ |
| 275 | scc_init_portstructs(); |
| 276 | scc_init_drivers(); |
| 277 | |
| 278 | return 0; |
Geert Uytterhoeven | c36a4e4 | 2008-12-30 14:07:07 +0100 | [diff] [blame] | 279 | |
| 280 | fail_free_b_rx: |
| 281 | free_irq(MVME147_IRQ_SCCB_RX, port); |
| 282 | fail_free_b_stat: |
| 283 | free_irq(MVME147_IRQ_SCCB_STAT, port); |
| 284 | fail_free_b_tx: |
| 285 | free_irq(MVME147_IRQ_SCCB_TX, port); |
| 286 | fail_free_a_spcond: |
| 287 | free_irq(MVME147_IRQ_SCCA_SPCOND, port); |
| 288 | fail_free_a_rx: |
| 289 | free_irq(MVME147_IRQ_SCCA_RX, port); |
| 290 | fail_free_a_stat: |
| 291 | free_irq(MVME147_IRQ_SCCA_STAT, port); |
| 292 | fail_free_a_tx: |
| 293 | free_irq(MVME147_IRQ_SCCA_TX, port); |
| 294 | fail: |
| 295 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 296 | } |
| 297 | #endif |
| 298 | |
| 299 | |
| 300 | #ifdef CONFIG_MVME162_SCC |
Peter Huewe | eb054e3 | 2009-08-20 22:42:31 +0200 | [diff] [blame^] | 301 | static int __init mvme162_scc_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 302 | { |
| 303 | struct scc_port *port; |
Geert Uytterhoeven | c36a4e4 | 2008-12-30 14:07:07 +0100 | [diff] [blame] | 304 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | |
| 306 | if (!(mvme16x_config & MVME16x_CONFIG_GOT_SCCA)) |
| 307 | return (-ENODEV); |
| 308 | |
| 309 | printk(KERN_INFO "SCC: MVME162 Serial Driver\n"); |
| 310 | /* Init channel A */ |
| 311 | port = &scc_ports[0]; |
| 312 | port->channel = CHANNEL_A; |
| 313 | port->ctrlp = (volatile unsigned char *)MVME_SCC_A_ADDR; |
| 314 | port->datap = port->ctrlp + 2; |
| 315 | port->port_a = &scc_ports[0]; |
| 316 | port->port_b = &scc_ports[1]; |
Geert Uytterhoeven | c36a4e4 | 2008-12-30 14:07:07 +0100 | [diff] [blame] | 317 | error = request_irq(MVME162_IRQ_SCCA_TX, scc_tx_int, IRQF_DISABLED, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 318 | "SCC-A TX", port); |
Geert Uytterhoeven | c36a4e4 | 2008-12-30 14:07:07 +0100 | [diff] [blame] | 319 | if (error) |
| 320 | goto fail; |
| 321 | error = request_irq(MVME162_IRQ_SCCA_STAT, scc_stat_int, IRQF_DISABLED, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 322 | "SCC-A status", port); |
Geert Uytterhoeven | c36a4e4 | 2008-12-30 14:07:07 +0100 | [diff] [blame] | 323 | if (error) |
| 324 | goto fail_free_a_tx; |
| 325 | error = request_irq(MVME162_IRQ_SCCA_RX, scc_rx_int, IRQF_DISABLED, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 326 | "SCC-A RX", port); |
Geert Uytterhoeven | c36a4e4 | 2008-12-30 14:07:07 +0100 | [diff] [blame] | 327 | if (error) |
| 328 | goto fail_free_a_stat; |
| 329 | error = request_irq(MVME162_IRQ_SCCA_SPCOND, scc_spcond_int, |
| 330 | IRQF_DISABLED, "SCC-A special cond", port); |
| 331 | if (error) |
| 332 | goto fail_free_a_rx; |
| 333 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | { |
| 335 | SCC_ACCESS_INIT(port); |
| 336 | |
| 337 | /* disable interrupts for this channel */ |
| 338 | SCCwrite(INT_AND_DMA_REG, 0); |
| 339 | /* Set the interrupt vector */ |
| 340 | SCCwrite(INT_VECTOR_REG, MVME162_IRQ_SCC_BASE); |
| 341 | /* Interrupt parameters: vector includes status, status low */ |
| 342 | SCCwrite(MASTER_INT_CTRL, MIC_VEC_INCL_STAT); |
| 343 | SCCmod(MASTER_INT_CTRL, 0xff, MIC_MASTER_INT_ENAB); |
| 344 | } |
| 345 | |
| 346 | /* Init channel B */ |
| 347 | port = &scc_ports[1]; |
| 348 | port->channel = CHANNEL_B; |
| 349 | port->ctrlp = (volatile unsigned char *)MVME_SCC_B_ADDR; |
| 350 | port->datap = port->ctrlp + 2; |
| 351 | port->port_a = &scc_ports[0]; |
| 352 | port->port_b = &scc_ports[1]; |
Geert Uytterhoeven | c36a4e4 | 2008-12-30 14:07:07 +0100 | [diff] [blame] | 353 | error = request_irq(MVME162_IRQ_SCCB_TX, scc_tx_int, IRQF_DISABLED, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 354 | "SCC-B TX", port); |
Geert Uytterhoeven | c36a4e4 | 2008-12-30 14:07:07 +0100 | [diff] [blame] | 355 | if (error) |
| 356 | goto fail_free_a_spcond; |
| 357 | error = request_irq(MVME162_IRQ_SCCB_STAT, scc_stat_int, IRQF_DISABLED, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 358 | "SCC-B status", port); |
Geert Uytterhoeven | c36a4e4 | 2008-12-30 14:07:07 +0100 | [diff] [blame] | 359 | if (error) |
| 360 | goto fail_free_b_tx; |
| 361 | error = request_irq(MVME162_IRQ_SCCB_RX, scc_rx_int, IRQF_DISABLED, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 362 | "SCC-B RX", port); |
Geert Uytterhoeven | c36a4e4 | 2008-12-30 14:07:07 +0100 | [diff] [blame] | 363 | if (error) |
| 364 | goto fail_free_b_stat; |
| 365 | error = request_irq(MVME162_IRQ_SCCB_SPCOND, scc_spcond_int, |
| 366 | IRQF_DISABLED, "SCC-B special cond", port); |
| 367 | if (error) |
| 368 | goto fail_free_b_rx; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 369 | |
| 370 | { |
| 371 | SCC_ACCESS_INIT(port); /* Either channel will do */ |
| 372 | |
| 373 | /* disable interrupts for this channel */ |
| 374 | SCCwrite(INT_AND_DMA_REG, 0); |
| 375 | } |
| 376 | |
| 377 | /* Ensure interrupts are enabled in the MC2 chip */ |
| 378 | *(volatile char *)0xfff4201d = 0x14; |
| 379 | |
| 380 | /* Initialise the tty driver structures and register */ |
| 381 | scc_init_portstructs(); |
| 382 | scc_init_drivers(); |
| 383 | |
| 384 | return 0; |
Geert Uytterhoeven | c36a4e4 | 2008-12-30 14:07:07 +0100 | [diff] [blame] | 385 | |
| 386 | fail_free_b_rx: |
| 387 | free_irq(MVME162_IRQ_SCCB_RX, port); |
| 388 | fail_free_b_stat: |
| 389 | free_irq(MVME162_IRQ_SCCB_STAT, port); |
| 390 | fail_free_b_tx: |
| 391 | free_irq(MVME162_IRQ_SCCB_TX, port); |
| 392 | fail_free_a_spcond: |
| 393 | free_irq(MVME162_IRQ_SCCA_SPCOND, port); |
| 394 | fail_free_a_rx: |
| 395 | free_irq(MVME162_IRQ_SCCA_RX, port); |
| 396 | fail_free_a_stat: |
| 397 | free_irq(MVME162_IRQ_SCCA_STAT, port); |
| 398 | fail_free_a_tx: |
| 399 | free_irq(MVME162_IRQ_SCCA_TX, port); |
| 400 | fail: |
| 401 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 402 | } |
| 403 | #endif |
| 404 | |
| 405 | |
| 406 | #ifdef CONFIG_BVME6000_SCC |
Peter Huewe | eb054e3 | 2009-08-20 22:42:31 +0200 | [diff] [blame^] | 407 | static int __init bvme6000_scc_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 408 | { |
| 409 | struct scc_port *port; |
Geert Uytterhoeven | c36a4e4 | 2008-12-30 14:07:07 +0100 | [diff] [blame] | 410 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | |
| 412 | printk(KERN_INFO "SCC: BVME6000 Serial Driver\n"); |
| 413 | /* Init channel A */ |
| 414 | port = &scc_ports[0]; |
| 415 | port->channel = CHANNEL_A; |
| 416 | port->ctrlp = (volatile unsigned char *)BVME_SCC_A_ADDR; |
| 417 | port->datap = port->ctrlp + 4; |
| 418 | port->port_a = &scc_ports[0]; |
| 419 | port->port_b = &scc_ports[1]; |
Geert Uytterhoeven | c36a4e4 | 2008-12-30 14:07:07 +0100 | [diff] [blame] | 420 | error = request_irq(BVME_IRQ_SCCA_TX, scc_tx_int, IRQF_DISABLED, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 421 | "SCC-A TX", port); |
Geert Uytterhoeven | c36a4e4 | 2008-12-30 14:07:07 +0100 | [diff] [blame] | 422 | if (error) |
| 423 | goto fail; |
| 424 | error = request_irq(BVME_IRQ_SCCA_STAT, scc_stat_int, IRQF_DISABLED, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 425 | "SCC-A status", port); |
Geert Uytterhoeven | c36a4e4 | 2008-12-30 14:07:07 +0100 | [diff] [blame] | 426 | if (error) |
| 427 | goto fail_free_a_tx; |
| 428 | error = request_irq(BVME_IRQ_SCCA_RX, scc_rx_int, IRQF_DISABLED, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | "SCC-A RX", port); |
Geert Uytterhoeven | c36a4e4 | 2008-12-30 14:07:07 +0100 | [diff] [blame] | 430 | if (error) |
| 431 | goto fail_free_a_stat; |
| 432 | error = request_irq(BVME_IRQ_SCCA_SPCOND, scc_spcond_int, |
| 433 | IRQF_DISABLED, "SCC-A special cond", port); |
| 434 | if (error) |
| 435 | goto fail_free_a_rx; |
| 436 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 437 | { |
| 438 | SCC_ACCESS_INIT(port); |
| 439 | |
| 440 | /* disable interrupts for this channel */ |
| 441 | SCCwrite(INT_AND_DMA_REG, 0); |
| 442 | /* Set the interrupt vector */ |
| 443 | SCCwrite(INT_VECTOR_REG, BVME_IRQ_SCC_BASE); |
| 444 | /* Interrupt parameters: vector includes status, status low */ |
| 445 | SCCwrite(MASTER_INT_CTRL, MIC_VEC_INCL_STAT); |
| 446 | SCCmod(MASTER_INT_CTRL, 0xff, MIC_MASTER_INT_ENAB); |
| 447 | } |
| 448 | |
| 449 | /* Init channel B */ |
| 450 | port = &scc_ports[1]; |
| 451 | port->channel = CHANNEL_B; |
| 452 | port->ctrlp = (volatile unsigned char *)BVME_SCC_B_ADDR; |
| 453 | port->datap = port->ctrlp + 4; |
| 454 | port->port_a = &scc_ports[0]; |
| 455 | port->port_b = &scc_ports[1]; |
Geert Uytterhoeven | c36a4e4 | 2008-12-30 14:07:07 +0100 | [diff] [blame] | 456 | error = request_irq(BVME_IRQ_SCCB_TX, scc_tx_int, IRQF_DISABLED, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | "SCC-B TX", port); |
Geert Uytterhoeven | c36a4e4 | 2008-12-30 14:07:07 +0100 | [diff] [blame] | 458 | if (error) |
| 459 | goto fail_free_a_spcond; |
| 460 | error = request_irq(BVME_IRQ_SCCB_STAT, scc_stat_int, IRQF_DISABLED, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 461 | "SCC-B status", port); |
Geert Uytterhoeven | c36a4e4 | 2008-12-30 14:07:07 +0100 | [diff] [blame] | 462 | if (error) |
| 463 | goto fail_free_b_tx; |
| 464 | error = request_irq(BVME_IRQ_SCCB_RX, scc_rx_int, IRQF_DISABLED, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 465 | "SCC-B RX", port); |
Geert Uytterhoeven | c36a4e4 | 2008-12-30 14:07:07 +0100 | [diff] [blame] | 466 | if (error) |
| 467 | goto fail_free_b_stat; |
| 468 | error = request_irq(BVME_IRQ_SCCB_SPCOND, scc_spcond_int, |
| 469 | IRQF_DISABLED, "SCC-B special cond", port); |
| 470 | if (error) |
| 471 | goto fail_free_b_rx; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 472 | |
| 473 | { |
| 474 | SCC_ACCESS_INIT(port); /* Either channel will do */ |
| 475 | |
| 476 | /* disable interrupts for this channel */ |
| 477 | SCCwrite(INT_AND_DMA_REG, 0); |
| 478 | } |
| 479 | |
| 480 | /* Initialise the tty driver structures and register */ |
| 481 | scc_init_portstructs(); |
| 482 | scc_init_drivers(); |
| 483 | |
| 484 | return 0; |
Geert Uytterhoeven | c36a4e4 | 2008-12-30 14:07:07 +0100 | [diff] [blame] | 485 | |
| 486 | fail: |
| 487 | free_irq(BVME_IRQ_SCCA_STAT, port); |
| 488 | fail_free_a_tx: |
| 489 | free_irq(BVME_IRQ_SCCA_RX, port); |
| 490 | fail_free_a_stat: |
| 491 | free_irq(BVME_IRQ_SCCA_SPCOND, port); |
| 492 | fail_free_a_rx: |
| 493 | free_irq(BVME_IRQ_SCCB_TX, port); |
| 494 | fail_free_a_spcond: |
| 495 | free_irq(BVME_IRQ_SCCB_STAT, port); |
| 496 | fail_free_b_tx: |
| 497 | free_irq(BVME_IRQ_SCCB_RX, port); |
| 498 | fail_free_b_stat: |
| 499 | free_irq(BVME_IRQ_SCCB_SPCOND, port); |
| 500 | fail_free_b_rx: |
| 501 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | } |
| 503 | #endif |
| 504 | |
| 505 | |
Peter Huewe | eb054e3 | 2009-08-20 22:42:31 +0200 | [diff] [blame^] | 506 | static int __init vme_scc_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 507 | { |
| 508 | int res = -ENODEV; |
| 509 | |
| 510 | #ifdef CONFIG_MVME147_SCC |
| 511 | if (MACH_IS_MVME147) |
| 512 | res = mvme147_scc_init(); |
| 513 | #endif |
| 514 | #ifdef CONFIG_MVME162_SCC |
| 515 | if (MACH_IS_MVME16x) |
| 516 | res = mvme162_scc_init(); |
| 517 | #endif |
| 518 | #ifdef CONFIG_BVME6000_SCC |
| 519 | if (MACH_IS_BVME6000) |
| 520 | res = bvme6000_scc_init(); |
| 521 | #endif |
| 522 | return res; |
| 523 | } |
| 524 | |
| 525 | module_init(vme_scc_init); |
| 526 | |
| 527 | |
| 528 | /*--------------------------------------------------------------------------- |
| 529 | * Interrupt handlers |
| 530 | *--------------------------------------------------------------------------*/ |
| 531 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 532 | static irqreturn_t scc_rx_int(int irq, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 533 | { |
| 534 | unsigned char ch; |
| 535 | struct scc_port *port = data; |
Geert Uytterhoeven | 732730d | 2008-07-27 01:39:52 +0200 | [diff] [blame] | 536 | struct tty_struct *tty = port->gs.port.tty; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 537 | SCC_ACCESS_INIT(port); |
| 538 | |
| 539 | ch = SCCread_NB(RX_DATA_REG); |
| 540 | if (!tty) { |
| 541 | printk(KERN_WARNING "scc_rx_int with NULL tty!\n"); |
| 542 | SCCwrite_NB(COMMAND_REG, CR_HIGHEST_IUS_RESET); |
| 543 | return IRQ_HANDLED; |
| 544 | } |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 545 | tty_insert_flip_char(tty, ch, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 546 | |
| 547 | /* Check if another character is already ready; in that case, the |
| 548 | * spcond_int() function must be used, because this character may have an |
| 549 | * error condition that isn't signalled by the interrupt vector used! |
| 550 | */ |
| 551 | if (SCCread(INT_PENDING_REG) & |
| 552 | (port->channel == CHANNEL_A ? IPR_A_RX : IPR_B_RX)) { |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 553 | scc_spcond_int (irq, data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 554 | return IRQ_HANDLED; |
| 555 | } |
| 556 | |
| 557 | SCCwrite_NB(COMMAND_REG, CR_HIGHEST_IUS_RESET); |
| 558 | |
| 559 | tty_flip_buffer_push(tty); |
| 560 | return IRQ_HANDLED; |
| 561 | } |
| 562 | |
| 563 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 564 | static irqreturn_t scc_spcond_int(int irq, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 565 | { |
| 566 | struct scc_port *port = data; |
Geert Uytterhoeven | 732730d | 2008-07-27 01:39:52 +0200 | [diff] [blame] | 567 | struct tty_struct *tty = port->gs.port.tty; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 568 | unsigned char stat, ch, err; |
| 569 | int int_pending_mask = port->channel == CHANNEL_A ? |
| 570 | IPR_A_RX : IPR_B_RX; |
| 571 | SCC_ACCESS_INIT(port); |
| 572 | |
| 573 | if (!tty) { |
| 574 | printk(KERN_WARNING "scc_spcond_int with NULL tty!\n"); |
| 575 | SCCwrite(COMMAND_REG, CR_ERROR_RESET); |
| 576 | SCCwrite_NB(COMMAND_REG, CR_HIGHEST_IUS_RESET); |
| 577 | return IRQ_HANDLED; |
| 578 | } |
| 579 | do { |
| 580 | stat = SCCread(SPCOND_STATUS_REG); |
| 581 | ch = SCCread_NB(RX_DATA_REG); |
| 582 | |
| 583 | if (stat & SCSR_RX_OVERRUN) |
| 584 | err = TTY_OVERRUN; |
| 585 | else if (stat & SCSR_PARITY_ERR) |
| 586 | err = TTY_PARITY; |
| 587 | else if (stat & SCSR_CRC_FRAME_ERR) |
| 588 | err = TTY_FRAME; |
| 589 | else |
| 590 | err = 0; |
| 591 | |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 592 | tty_insert_flip_char(tty, ch, err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 593 | |
| 594 | /* ++TeSche: *All* errors have to be cleared manually, |
| 595 | * else the condition persists for the next chars |
| 596 | */ |
| 597 | if (err) |
| 598 | SCCwrite(COMMAND_REG, CR_ERROR_RESET); |
| 599 | |
| 600 | } while(SCCread(INT_PENDING_REG) & int_pending_mask); |
| 601 | |
| 602 | SCCwrite_NB(COMMAND_REG, CR_HIGHEST_IUS_RESET); |
| 603 | |
| 604 | tty_flip_buffer_push(tty); |
| 605 | return IRQ_HANDLED; |
| 606 | } |
| 607 | |
| 608 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 609 | static irqreturn_t scc_tx_int(int irq, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 610 | { |
| 611 | struct scc_port *port = data; |
| 612 | SCC_ACCESS_INIT(port); |
| 613 | |
Geert Uytterhoeven | 732730d | 2008-07-27 01:39:52 +0200 | [diff] [blame] | 614 | if (!port->gs.port.tty) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 615 | printk(KERN_WARNING "scc_tx_int with NULL tty!\n"); |
| 616 | SCCmod (INT_AND_DMA_REG, ~IDR_TX_INT_ENAB, 0); |
| 617 | SCCwrite(COMMAND_REG, CR_TX_PENDING_RESET); |
| 618 | SCCwrite_NB(COMMAND_REG, CR_HIGHEST_IUS_RESET); |
| 619 | return IRQ_HANDLED; |
| 620 | } |
| 621 | while ((SCCread_NB(STATUS_REG) & SR_TX_BUF_EMPTY)) { |
| 622 | if (port->x_char) { |
| 623 | SCCwrite(TX_DATA_REG, port->x_char); |
| 624 | port->x_char = 0; |
| 625 | } |
Geert Uytterhoeven | 732730d | 2008-07-27 01:39:52 +0200 | [diff] [blame] | 626 | else if ((port->gs.xmit_cnt <= 0) || |
| 627 | port->gs.port.tty->stopped || |
| 628 | port->gs.port.tty->hw_stopped) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 629 | break; |
| 630 | else { |
| 631 | SCCwrite(TX_DATA_REG, port->gs.xmit_buf[port->gs.xmit_tail++]); |
| 632 | port->gs.xmit_tail = port->gs.xmit_tail & (SERIAL_XMIT_SIZE-1); |
| 633 | if (--port->gs.xmit_cnt <= 0) |
| 634 | break; |
| 635 | } |
| 636 | } |
Geert Uytterhoeven | 732730d | 2008-07-27 01:39:52 +0200 | [diff] [blame] | 637 | if ((port->gs.xmit_cnt <= 0) || port->gs.port.tty->stopped || |
| 638 | port->gs.port.tty->hw_stopped) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 639 | /* disable tx interrupts */ |
| 640 | SCCmod (INT_AND_DMA_REG, ~IDR_TX_INT_ENAB, 0); |
| 641 | SCCwrite(COMMAND_REG, CR_TX_PENDING_RESET); /* disable tx_int on next tx underrun? */ |
Geert Uytterhoeven | 732730d | 2008-07-27 01:39:52 +0200 | [diff] [blame] | 642 | port->gs.port.flags &= ~GS_TX_INTEN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 643 | } |
Geert Uytterhoeven | 732730d | 2008-07-27 01:39:52 +0200 | [diff] [blame] | 644 | if (port->gs.port.tty && port->gs.xmit_cnt <= port->gs.wakeup_chars) |
| 645 | tty_wakeup(port->gs.port.tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 646 | |
| 647 | SCCwrite_NB(COMMAND_REG, CR_HIGHEST_IUS_RESET); |
| 648 | return IRQ_HANDLED; |
| 649 | } |
| 650 | |
| 651 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 652 | static irqreturn_t scc_stat_int(int irq, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 653 | { |
| 654 | struct scc_port *port = data; |
| 655 | unsigned channel = port->channel; |
| 656 | unsigned char last_sr, sr, changed; |
| 657 | SCC_ACCESS_INIT(port); |
| 658 | |
| 659 | last_sr = scc_last_status_reg[channel]; |
| 660 | sr = scc_last_status_reg[channel] = SCCread_NB(STATUS_REG); |
| 661 | changed = last_sr ^ sr; |
| 662 | |
| 663 | if (changed & SR_DCD) { |
| 664 | port->c_dcd = !!(sr & SR_DCD); |
Geert Uytterhoeven | 732730d | 2008-07-27 01:39:52 +0200 | [diff] [blame] | 665 | if (!(port->gs.port.flags & ASYNC_CHECK_CD)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 666 | ; /* Don't report DCD changes */ |
| 667 | else if (port->c_dcd) { |
Geert Uytterhoeven | 732730d | 2008-07-27 01:39:52 +0200 | [diff] [blame] | 668 | wake_up_interruptible(&port->gs.port.open_wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 669 | } |
| 670 | else { |
Geert Uytterhoeven | 732730d | 2008-07-27 01:39:52 +0200 | [diff] [blame] | 671 | if (port->gs.port.tty) |
| 672 | tty_hangup (port->gs.port.tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 673 | } |
| 674 | } |
| 675 | SCCwrite(COMMAND_REG, CR_EXTSTAT_RESET); |
| 676 | SCCwrite_NB(COMMAND_REG, CR_HIGHEST_IUS_RESET); |
| 677 | return IRQ_HANDLED; |
| 678 | } |
| 679 | |
| 680 | |
| 681 | /*--------------------------------------------------------------------------- |
| 682 | * generic_serial.c callback funtions |
| 683 | *--------------------------------------------------------------------------*/ |
| 684 | |
| 685 | static void scc_disable_tx_interrupts(void *ptr) |
| 686 | { |
| 687 | struct scc_port *port = ptr; |
| 688 | unsigned long flags; |
| 689 | SCC_ACCESS_INIT(port); |
| 690 | |
| 691 | local_irq_save(flags); |
| 692 | SCCmod(INT_AND_DMA_REG, ~IDR_TX_INT_ENAB, 0); |
Geert Uytterhoeven | 732730d | 2008-07-27 01:39:52 +0200 | [diff] [blame] | 693 | port->gs.port.flags &= ~GS_TX_INTEN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 694 | local_irq_restore(flags); |
| 695 | } |
| 696 | |
| 697 | |
| 698 | static void scc_enable_tx_interrupts(void *ptr) |
| 699 | { |
| 700 | struct scc_port *port = ptr; |
| 701 | unsigned long flags; |
| 702 | SCC_ACCESS_INIT(port); |
| 703 | |
| 704 | local_irq_save(flags); |
| 705 | SCCmod(INT_AND_DMA_REG, 0xff, IDR_TX_INT_ENAB); |
| 706 | /* restart the transmitter */ |
Al Viro | 2850bc2 | 2006-10-07 14:16:45 +0100 | [diff] [blame] | 707 | scc_tx_int (0, port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 708 | local_irq_restore(flags); |
| 709 | } |
| 710 | |
| 711 | |
| 712 | static void scc_disable_rx_interrupts(void *ptr) |
| 713 | { |
| 714 | struct scc_port *port = ptr; |
| 715 | unsigned long flags; |
| 716 | SCC_ACCESS_INIT(port); |
| 717 | |
| 718 | local_irq_save(flags); |
| 719 | SCCmod(INT_AND_DMA_REG, |
| 720 | ~(IDR_RX_INT_MASK|IDR_PARERR_AS_SPCOND|IDR_EXTSTAT_INT_ENAB), 0); |
| 721 | local_irq_restore(flags); |
| 722 | } |
| 723 | |
| 724 | |
| 725 | static void scc_enable_rx_interrupts(void *ptr) |
| 726 | { |
| 727 | struct scc_port *port = ptr; |
| 728 | unsigned long flags; |
| 729 | SCC_ACCESS_INIT(port); |
| 730 | |
| 731 | local_irq_save(flags); |
| 732 | SCCmod(INT_AND_DMA_REG, 0xff, |
| 733 | IDR_EXTSTAT_INT_ENAB|IDR_PARERR_AS_SPCOND|IDR_RX_INT_ALL); |
| 734 | local_irq_restore(flags); |
| 735 | } |
| 736 | |
| 737 | |
Alan Cox | 31f3593 | 2009-01-02 13:45:05 +0000 | [diff] [blame] | 738 | static int scc_carrier_raised(struct tty_port *port) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 739 | { |
Alan Cox | 36c621d | 2009-01-02 13:46:10 +0000 | [diff] [blame] | 740 | struct scc_port *sc = container_of(port, struct scc_port, gs.port); |
| 741 | unsigned channel = sc->channel; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 742 | |
| 743 | return !!(scc_last_status_reg[channel] & SR_DCD); |
| 744 | } |
| 745 | |
| 746 | |
| 747 | static void scc_shutdown_port(void *ptr) |
| 748 | { |
| 749 | struct scc_port *port = ptr; |
| 750 | |
Geert Uytterhoeven | 732730d | 2008-07-27 01:39:52 +0200 | [diff] [blame] | 751 | port->gs.port.flags &= ~ GS_ACTIVE; |
Alan Cox | 36c621d | 2009-01-02 13:46:10 +0000 | [diff] [blame] | 752 | if (port->gs.port.tty && (port->gs.port.tty->termios->c_cflag & HUPCL)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 753 | scc_setsignals (port, 0, 0); |
| 754 | } |
| 755 | } |
| 756 | |
| 757 | |
| 758 | static int scc_set_real_termios (void *ptr) |
| 759 | { |
| 760 | /* the SCC has char sizes 5,7,6,8 in that order! */ |
| 761 | static int chsize_map[4] = { 0, 2, 1, 3 }; |
| 762 | unsigned cflag, baud, chsize, channel, brgval = 0; |
| 763 | unsigned long flags; |
| 764 | struct scc_port *port = ptr; |
| 765 | SCC_ACCESS_INIT(port); |
| 766 | |
Geert Uytterhoeven | 732730d | 2008-07-27 01:39:52 +0200 | [diff] [blame] | 767 | if (!port->gs.port.tty || !port->gs.port.tty->termios) return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 768 | |
| 769 | channel = port->channel; |
| 770 | |
| 771 | if (channel == CHANNEL_A) |
| 772 | return 0; /* Settings controlled by boot PROM */ |
| 773 | |
Geert Uytterhoeven | 732730d | 2008-07-27 01:39:52 +0200 | [diff] [blame] | 774 | cflag = port->gs.port.tty->termios->c_cflag; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 775 | baud = port->gs.baud; |
| 776 | chsize = (cflag & CSIZE) >> 4; |
| 777 | |
| 778 | if (baud == 0) { |
| 779 | /* speed == 0 -> drop DTR */ |
| 780 | local_irq_save(flags); |
| 781 | SCCmod(TX_CTRL_REG, ~TCR_DTR, 0); |
| 782 | local_irq_restore(flags); |
| 783 | return 0; |
| 784 | } |
| 785 | else if ((MACH_IS_MVME16x && (baud < 50 || baud > 38400)) || |
| 786 | (MACH_IS_MVME147 && (baud < 50 || baud > 19200)) || |
| 787 | (MACH_IS_BVME6000 &&(baud < 50 || baud > 76800))) { |
| 788 | printk(KERN_NOTICE "SCC: Bad speed requested, %d\n", baud); |
| 789 | return 0; |
| 790 | } |
| 791 | |
| 792 | if (cflag & CLOCAL) |
Geert Uytterhoeven | 732730d | 2008-07-27 01:39:52 +0200 | [diff] [blame] | 793 | port->gs.port.flags &= ~ASYNC_CHECK_CD; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 794 | else |
Geert Uytterhoeven | 732730d | 2008-07-27 01:39:52 +0200 | [diff] [blame] | 795 | port->gs.port.flags |= ASYNC_CHECK_CD; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 796 | |
| 797 | #ifdef CONFIG_MVME147_SCC |
| 798 | if (MACH_IS_MVME147) |
| 799 | brgval = (M147_SCC_PCLK + baud/2) / (16 * 2 * baud) - 2; |
| 800 | #endif |
| 801 | #ifdef CONFIG_MVME162_SCC |
| 802 | if (MACH_IS_MVME16x) |
| 803 | brgval = (MVME_SCC_PCLK + baud/2) / (16 * 2 * baud) - 2; |
| 804 | #endif |
| 805 | #ifdef CONFIG_BVME6000_SCC |
| 806 | if (MACH_IS_BVME6000) |
| 807 | brgval = (BVME_SCC_RTxC + baud/2) / (16 * 2 * baud) - 2; |
| 808 | #endif |
| 809 | /* Now we have all parameters and can go to set them: */ |
| 810 | local_irq_save(flags); |
| 811 | |
| 812 | /* receiver's character size and auto-enables */ |
| 813 | SCCmod(RX_CTRL_REG, ~(RCR_CHSIZE_MASK|RCR_AUTO_ENAB_MODE), |
| 814 | (chsize_map[chsize] << 6) | |
| 815 | ((cflag & CRTSCTS) ? RCR_AUTO_ENAB_MODE : 0)); |
| 816 | /* parity and stop bits (both, Tx and Rx), clock mode never changes */ |
| 817 | SCCmod (AUX1_CTRL_REG, |
| 818 | ~(A1CR_PARITY_MASK | A1CR_MODE_MASK), |
| 819 | ((cflag & PARENB |
| 820 | ? (cflag & PARODD ? A1CR_PARITY_ODD : A1CR_PARITY_EVEN) |
| 821 | : A1CR_PARITY_NONE) |
| 822 | | (cflag & CSTOPB ? A1CR_MODE_ASYNC_2 : A1CR_MODE_ASYNC_1))); |
| 823 | /* sender's character size, set DTR for valid baud rate */ |
| 824 | SCCmod(TX_CTRL_REG, ~TCR_CHSIZE_MASK, chsize_map[chsize] << 5 | TCR_DTR); |
| 825 | /* clock sources never change */ |
| 826 | /* disable BRG before changing the value */ |
| 827 | SCCmod(DPLL_CTRL_REG, ~DCR_BRG_ENAB, 0); |
| 828 | /* BRG value */ |
| 829 | SCCwrite(TIMER_LOW_REG, brgval & 0xff); |
| 830 | SCCwrite(TIMER_HIGH_REG, (brgval >> 8) & 0xff); |
| 831 | /* BRG enable, and clock source never changes */ |
| 832 | SCCmod(DPLL_CTRL_REG, 0xff, DCR_BRG_ENAB); |
| 833 | |
| 834 | local_irq_restore(flags); |
| 835 | |
| 836 | return 0; |
| 837 | } |
| 838 | |
| 839 | |
| 840 | static int scc_chars_in_buffer (void *ptr) |
| 841 | { |
| 842 | struct scc_port *port = ptr; |
| 843 | SCC_ACCESS_INIT(port); |
| 844 | |
| 845 | return (SCCread (SPCOND_STATUS_REG) & SCSR_ALL_SENT) ? 0 : 1; |
| 846 | } |
| 847 | |
| 848 | |
| 849 | /* Comment taken from sx.c (2.4.0): |
| 850 | I haven't the foggiest why the decrement use count has to happen |
| 851 | here. The whole linux serial drivers stuff needs to be redesigned. |
| 852 | My guess is that this is a hack to minimize the impact of a bug |
| 853 | elsewhere. Thinking about it some more. (try it sometime) Try |
| 854 | running minicom on a serial port that is driven by a modularized |
| 855 | driver. Have the modem hangup. Then remove the driver module. Then |
| 856 | exit minicom. I expect an "oops". -- REW */ |
| 857 | |
| 858 | static void scc_hungup(void *ptr) |
| 859 | { |
| 860 | scc_disable_tx_interrupts(ptr); |
| 861 | scc_disable_rx_interrupts(ptr); |
| 862 | } |
| 863 | |
| 864 | |
| 865 | static void scc_close(void *ptr) |
| 866 | { |
| 867 | scc_disable_tx_interrupts(ptr); |
| 868 | scc_disable_rx_interrupts(ptr); |
| 869 | } |
| 870 | |
| 871 | |
| 872 | /*--------------------------------------------------------------------------- |
| 873 | * Internal support functions |
| 874 | *--------------------------------------------------------------------------*/ |
| 875 | |
| 876 | static void scc_setsignals(struct scc_port *port, int dtr, int rts) |
| 877 | { |
| 878 | unsigned long flags; |
| 879 | unsigned char t; |
| 880 | SCC_ACCESS_INIT(port); |
| 881 | |
| 882 | local_irq_save(flags); |
| 883 | t = SCCread(TX_CTRL_REG); |
| 884 | if (dtr >= 0) t = dtr? (t | TCR_DTR): (t & ~TCR_DTR); |
| 885 | if (rts >= 0) t = rts? (t | TCR_RTS): (t & ~TCR_RTS); |
| 886 | SCCwrite(TX_CTRL_REG, t); |
| 887 | local_irq_restore(flags); |
| 888 | } |
| 889 | |
| 890 | |
| 891 | static void scc_send_xchar(struct tty_struct *tty, char ch) |
| 892 | { |
Alan Cox | c9f19e9 | 2009-01-02 13:47:26 +0000 | [diff] [blame] | 893 | struct scc_port *port = tty->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 894 | |
| 895 | port->x_char = ch; |
| 896 | if (ch) |
| 897 | scc_enable_tx_interrupts(port); |
| 898 | } |
| 899 | |
| 900 | |
| 901 | /*--------------------------------------------------------------------------- |
| 902 | * Driver entrypoints referenced from above |
| 903 | *--------------------------------------------------------------------------*/ |
| 904 | |
| 905 | static int scc_open (struct tty_struct * tty, struct file * filp) |
| 906 | { |
| 907 | int line = tty->index; |
| 908 | int retval; |
| 909 | struct scc_port *port = &scc_ports[line]; |
| 910 | int i, channel = port->channel; |
| 911 | unsigned long flags; |
| 912 | SCC_ACCESS_INIT(port); |
| 913 | #if defined(CONFIG_MVME162_SCC) || defined(CONFIG_MVME147_SCC) |
| 914 | static const struct { |
| 915 | unsigned reg, val; |
| 916 | } mvme_init_tab[] = { |
| 917 | /* Values for MVME162 and MVME147 */ |
| 918 | /* no parity, 1 stop bit, async, 1:16 */ |
| 919 | { AUX1_CTRL_REG, A1CR_PARITY_NONE|A1CR_MODE_ASYNC_1|A1CR_CLKMODE_x16 }, |
| 920 | /* parity error is special cond, ints disabled, no DMA */ |
| 921 | { INT_AND_DMA_REG, IDR_PARERR_AS_SPCOND | IDR_RX_INT_DISAB }, |
| 922 | /* Rx 8 bits/char, no auto enable, Rx off */ |
| 923 | { RX_CTRL_REG, RCR_CHSIZE_8 }, |
| 924 | /* DTR off, Tx 8 bits/char, RTS off, Tx off */ |
| 925 | { TX_CTRL_REG, TCR_CHSIZE_8 }, |
| 926 | /* special features off */ |
| 927 | { AUX2_CTRL_REG, 0 }, |
| 928 | { CLK_CTRL_REG, CCR_RXCLK_BRG | CCR_TXCLK_BRG }, |
| 929 | { DPLL_CTRL_REG, DCR_BRG_ENAB | DCR_BRG_USE_PCLK }, |
| 930 | /* Start Rx */ |
| 931 | { RX_CTRL_REG, RCR_RX_ENAB | RCR_CHSIZE_8 }, |
| 932 | /* Start Tx */ |
| 933 | { TX_CTRL_REG, TCR_TX_ENAB | TCR_RTS | TCR_DTR | TCR_CHSIZE_8 }, |
| 934 | /* Ext/Stat ints: DCD only */ |
| 935 | { INT_CTRL_REG, ICR_ENAB_DCD_INT }, |
| 936 | /* Reset Ext/Stat ints */ |
| 937 | { COMMAND_REG, CR_EXTSTAT_RESET }, |
| 938 | /* ...again */ |
| 939 | { COMMAND_REG, CR_EXTSTAT_RESET }, |
| 940 | }; |
| 941 | #endif |
| 942 | #if defined(CONFIG_BVME6000_SCC) |
| 943 | static const struct { |
| 944 | unsigned reg, val; |
| 945 | } bvme_init_tab[] = { |
| 946 | /* Values for BVME6000 */ |
| 947 | /* no parity, 1 stop bit, async, 1:16 */ |
| 948 | { AUX1_CTRL_REG, A1CR_PARITY_NONE|A1CR_MODE_ASYNC_1|A1CR_CLKMODE_x16 }, |
| 949 | /* parity error is special cond, ints disabled, no DMA */ |
| 950 | { INT_AND_DMA_REG, IDR_PARERR_AS_SPCOND | IDR_RX_INT_DISAB }, |
| 951 | /* Rx 8 bits/char, no auto enable, Rx off */ |
| 952 | { RX_CTRL_REG, RCR_CHSIZE_8 }, |
| 953 | /* DTR off, Tx 8 bits/char, RTS off, Tx off */ |
| 954 | { TX_CTRL_REG, TCR_CHSIZE_8 }, |
| 955 | /* special features off */ |
| 956 | { AUX2_CTRL_REG, 0 }, |
| 957 | { CLK_CTRL_REG, CCR_RTxC_XTAL | CCR_RXCLK_BRG | CCR_TXCLK_BRG }, |
| 958 | { DPLL_CTRL_REG, DCR_BRG_ENAB }, |
| 959 | /* Start Rx */ |
| 960 | { RX_CTRL_REG, RCR_RX_ENAB | RCR_CHSIZE_8 }, |
| 961 | /* Start Tx */ |
| 962 | { TX_CTRL_REG, TCR_TX_ENAB | TCR_RTS | TCR_DTR | TCR_CHSIZE_8 }, |
| 963 | /* Ext/Stat ints: DCD only */ |
| 964 | { INT_CTRL_REG, ICR_ENAB_DCD_INT }, |
| 965 | /* Reset Ext/Stat ints */ |
| 966 | { COMMAND_REG, CR_EXTSTAT_RESET }, |
| 967 | /* ...again */ |
| 968 | { COMMAND_REG, CR_EXTSTAT_RESET }, |
| 969 | }; |
| 970 | #endif |
Geert Uytterhoeven | 732730d | 2008-07-27 01:39:52 +0200 | [diff] [blame] | 971 | if (!(port->gs.port.flags & ASYNC_INITIALIZED)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 972 | local_irq_save(flags); |
| 973 | #if defined(CONFIG_MVME147_SCC) || defined(CONFIG_MVME162_SCC) |
| 974 | if (MACH_IS_MVME147 || MACH_IS_MVME16x) { |
Tobias Klauser | fe97107 | 2006-01-09 20:54:02 -0800 | [diff] [blame] | 975 | for (i = 0; i < ARRAY_SIZE(mvme_init_tab); ++i) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 976 | SCCwrite(mvme_init_tab[i].reg, mvme_init_tab[i].val); |
| 977 | } |
| 978 | #endif |
| 979 | #if defined(CONFIG_BVME6000_SCC) |
| 980 | if (MACH_IS_BVME6000) { |
Tobias Klauser | fe97107 | 2006-01-09 20:54:02 -0800 | [diff] [blame] | 981 | for (i = 0; i < ARRAY_SIZE(bvme_init_tab); ++i) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 982 | SCCwrite(bvme_init_tab[i].reg, bvme_init_tab[i].val); |
| 983 | } |
| 984 | #endif |
| 985 | |
| 986 | /* remember status register for detection of DCD and CTS changes */ |
| 987 | scc_last_status_reg[channel] = SCCread(STATUS_REG); |
| 988 | |
| 989 | port->c_dcd = 0; /* Prevent initial 1->0 interrupt */ |
| 990 | scc_setsignals (port, 1,1); |
| 991 | local_irq_restore(flags); |
| 992 | } |
| 993 | |
| 994 | tty->driver_data = port; |
Geert Uytterhoeven | 732730d | 2008-07-27 01:39:52 +0200 | [diff] [blame] | 995 | port->gs.port.tty = tty; |
| 996 | port->gs.port.count++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 997 | retval = gs_init_port(&port->gs); |
| 998 | if (retval) { |
Geert Uytterhoeven | 732730d | 2008-07-27 01:39:52 +0200 | [diff] [blame] | 999 | port->gs.port.count--; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1000 | return retval; |
| 1001 | } |
Geert Uytterhoeven | 732730d | 2008-07-27 01:39:52 +0200 | [diff] [blame] | 1002 | port->gs.port.flags |= GS_ACTIVE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1003 | retval = gs_block_til_ready(port, filp); |
| 1004 | |
| 1005 | if (retval) { |
Geert Uytterhoeven | 732730d | 2008-07-27 01:39:52 +0200 | [diff] [blame] | 1006 | port->gs.port.count--; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1007 | return retval; |
| 1008 | } |
| 1009 | |
Alan Cox | 31f3593 | 2009-01-02 13:45:05 +0000 | [diff] [blame] | 1010 | port->c_dcd = tty_port_carrier_raised(&port->gs.port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1011 | |
| 1012 | scc_enable_rx_interrupts(port); |
| 1013 | |
| 1014 | return 0; |
| 1015 | } |
| 1016 | |
| 1017 | |
| 1018 | static void scc_throttle (struct tty_struct * tty) |
| 1019 | { |
Alan Cox | c9f19e9 | 2009-01-02 13:47:26 +0000 | [diff] [blame] | 1020 | struct scc_port *port = tty->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1021 | unsigned long flags; |
| 1022 | SCC_ACCESS_INIT(port); |
| 1023 | |
| 1024 | if (tty->termios->c_cflag & CRTSCTS) { |
| 1025 | local_irq_save(flags); |
| 1026 | SCCmod(TX_CTRL_REG, ~TCR_RTS, 0); |
| 1027 | local_irq_restore(flags); |
| 1028 | } |
| 1029 | if (I_IXOFF(tty)) |
| 1030 | scc_send_xchar(tty, STOP_CHAR(tty)); |
| 1031 | } |
| 1032 | |
| 1033 | |
| 1034 | static void scc_unthrottle (struct tty_struct * tty) |
| 1035 | { |
Alan Cox | c9f19e9 | 2009-01-02 13:47:26 +0000 | [diff] [blame] | 1036 | struct scc_port *port = tty->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1037 | unsigned long flags; |
| 1038 | SCC_ACCESS_INIT(port); |
| 1039 | |
| 1040 | if (tty->termios->c_cflag & CRTSCTS) { |
| 1041 | local_irq_save(flags); |
| 1042 | SCCmod(TX_CTRL_REG, 0xff, TCR_RTS); |
| 1043 | local_irq_restore(flags); |
| 1044 | } |
| 1045 | if (I_IXOFF(tty)) |
| 1046 | scc_send_xchar(tty, START_CHAR(tty)); |
| 1047 | } |
| 1048 | |
| 1049 | |
| 1050 | static int scc_ioctl(struct tty_struct *tty, struct file *file, |
| 1051 | unsigned int cmd, unsigned long arg) |
| 1052 | { |
| 1053 | return -ENOIOCTLCMD; |
| 1054 | } |
| 1055 | |
| 1056 | |
Alan Cox | 9e98966 | 2008-07-22 11:18:03 +0100 | [diff] [blame] | 1057 | static int scc_break_ctl(struct tty_struct *tty, int break_state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1058 | { |
Alan Cox | c9f19e9 | 2009-01-02 13:47:26 +0000 | [diff] [blame] | 1059 | struct scc_port *port = tty->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1060 | unsigned long flags; |
| 1061 | SCC_ACCESS_INIT(port); |
| 1062 | |
| 1063 | local_irq_save(flags); |
| 1064 | SCCmod(TX_CTRL_REG, ~TCR_SEND_BREAK, |
| 1065 | break_state ? TCR_SEND_BREAK : 0); |
| 1066 | local_irq_restore(flags); |
Alan Cox | 9e98966 | 2008-07-22 11:18:03 +0100 | [diff] [blame] | 1067 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1068 | } |
| 1069 | |
| 1070 | |
| 1071 | /*--------------------------------------------------------------------------- |
| 1072 | * Serial console stuff... |
| 1073 | *--------------------------------------------------------------------------*/ |
| 1074 | |
| 1075 | #define scc_delay() do { __asm__ __volatile__ (" nop; nop"); } while (0) |
| 1076 | |
| 1077 | static void scc_ch_write (char ch) |
| 1078 | { |
| 1079 | volatile char *p = NULL; |
| 1080 | |
| 1081 | #ifdef CONFIG_MVME147_SCC |
| 1082 | if (MACH_IS_MVME147) |
| 1083 | p = (volatile char *)M147_SCC_A_ADDR; |
| 1084 | #endif |
| 1085 | #ifdef CONFIG_MVME162_SCC |
| 1086 | if (MACH_IS_MVME16x) |
| 1087 | p = (volatile char *)MVME_SCC_A_ADDR; |
| 1088 | #endif |
| 1089 | #ifdef CONFIG_BVME6000_SCC |
| 1090 | if (MACH_IS_BVME6000) |
| 1091 | p = (volatile char *)BVME_SCC_A_ADDR; |
| 1092 | #endif |
| 1093 | |
| 1094 | do { |
| 1095 | scc_delay(); |
| 1096 | } |
| 1097 | while (!(*p & 4)); |
| 1098 | scc_delay(); |
| 1099 | *p = 8; |
| 1100 | scc_delay(); |
| 1101 | *p = ch; |
| 1102 | } |
| 1103 | |
| 1104 | /* The console must be locked when we get here. */ |
| 1105 | |
| 1106 | static void scc_console_write (struct console *co, const char *str, unsigned count) |
| 1107 | { |
| 1108 | unsigned long flags; |
| 1109 | |
| 1110 | local_irq_save(flags); |
| 1111 | |
| 1112 | while (count--) |
| 1113 | { |
| 1114 | if (*str == '\n') |
| 1115 | scc_ch_write ('\r'); |
| 1116 | scc_ch_write (*str++); |
| 1117 | } |
| 1118 | local_irq_restore(flags); |
| 1119 | } |
| 1120 | |
| 1121 | static struct tty_driver *scc_console_device(struct console *c, int *index) |
| 1122 | { |
| 1123 | *index = c->index; |
| 1124 | return scc_driver; |
| 1125 | } |
| 1126 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1127 | static struct console sercons = { |
| 1128 | .name = "ttyS", |
| 1129 | .write = scc_console_write, |
| 1130 | .device = scc_console_device, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1131 | .flags = CON_PRINTBUFFER, |
| 1132 | .index = -1, |
| 1133 | }; |
| 1134 | |
| 1135 | |
| 1136 | static int __init vme_scc_console_init(void) |
| 1137 | { |
| 1138 | if (vme_brdtype == VME_TYPE_MVME147 || |
| 1139 | vme_brdtype == VME_TYPE_MVME162 || |
| 1140 | vme_brdtype == VME_TYPE_MVME172 || |
| 1141 | vme_brdtype == VME_TYPE_BVME4000 || |
| 1142 | vme_brdtype == VME_TYPE_BVME6000) |
| 1143 | register_console(&sercons); |
| 1144 | return 0; |
| 1145 | } |
| 1146 | console_initcall(vme_scc_console_init); |