Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * UART driver for 68360 CPM SCC or SMC |
| 3 | * Copyright (c) 2000 D. Jeff Dionne <jeff@uclinux.org>, |
| 4 | * Copyright (c) 2000 Michael Leslie <mleslie@lineo.ca> |
| 5 | * Copyright (c) 1997 Dan Malek <dmalek@jlc.net> |
| 6 | * |
| 7 | * I used the serial.c driver as the framework for this driver. |
| 8 | * Give credit to those guys. |
| 9 | * The original code was written for the MBX860 board. I tried to make |
| 10 | * it generic, but there may be some assumptions in the structures that |
| 11 | * have to be fixed later. |
| 12 | * To save porting time, I did not bother to change any object names |
| 13 | * that are not accessed outside of this file. |
| 14 | * It still needs lots of work........When it was easy, I included code |
| 15 | * to support the SCCs, but this has never been tested, nor is it complete. |
| 16 | * Only the SCCs support modem control, so that is not complete either. |
| 17 | * |
| 18 | * This module exports the following rs232 io functions: |
| 19 | * |
| 20 | * int rs_360_init(void); |
| 21 | */ |
| 22 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | #include <linux/module.h> |
| 24 | #include <linux/errno.h> |
| 25 | #include <linux/signal.h> |
| 26 | #include <linux/sched.h> |
| 27 | #include <linux/timer.h> |
| 28 | #include <linux/interrupt.h> |
| 29 | #include <linux/tty.h> |
| 30 | #include <linux/tty_flip.h> |
| 31 | #include <linux/serial.h> |
| 32 | #include <linux/serialP.h> |
| 33 | #include <linux/major.h> |
| 34 | #include <linux/string.h> |
| 35 | #include <linux/fcntl.h> |
| 36 | #include <linux/ptrace.h> |
| 37 | #include <linux/mm.h> |
| 38 | #include <linux/init.h> |
| 39 | #include <linux/delay.h> |
| 40 | #include <asm/irq.h> |
| 41 | #include <asm/m68360.h> |
| 42 | #include <asm/commproc.h> |
| 43 | |
| 44 | |
| 45 | #ifdef CONFIG_KGDB |
| 46 | extern void breakpoint(void); |
| 47 | extern void set_debug_traps(void); |
| 48 | extern int kgdb_output_string (const char* s, unsigned int count); |
| 49 | #endif |
| 50 | |
| 51 | |
| 52 | /* #ifdef CONFIG_SERIAL_CONSOLE */ /* This seems to be a post 2.0 thing - mles */ |
| 53 | #include <linux/console.h> |
Julia Lawall | d1ec61e | 2008-04-28 02:14:10 -0700 | [diff] [blame] | 54 | #include <linux/jiffies.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | |
| 56 | /* this defines the index into rs_table for the port to use |
| 57 | */ |
| 58 | #ifndef CONFIG_SERIAL_CONSOLE_PORT |
| 59 | #define CONFIG_SERIAL_CONSOLE_PORT 1 /* ie SMC2 - note USE_SMC2 must be defined */ |
| 60 | #endif |
| 61 | /* #endif */ |
| 62 | |
| 63 | #if 0 |
| 64 | /* SCC2 for console |
| 65 | */ |
| 66 | #undef CONFIG_SERIAL_CONSOLE_PORT |
| 67 | #define CONFIG_SERIAL_CONSOLE_PORT 2 |
| 68 | #endif |
| 69 | |
| 70 | |
| 71 | #define TX_WAKEUP ASYNC_SHARE_IRQ |
| 72 | |
| 73 | static char *serial_name = "CPM UART driver"; |
| 74 | static char *serial_version = "0.03"; |
| 75 | |
| 76 | static struct tty_driver *serial_driver; |
| 77 | int serial_console_setup(struct console *co, char *options); |
| 78 | |
| 79 | /* |
| 80 | * Serial driver configuration section. Here are the various options: |
| 81 | */ |
| 82 | #define SERIAL_PARANOIA_CHECK |
| 83 | #define CONFIG_SERIAL_NOPAUSE_IO |
| 84 | #define SERIAL_DO_RESTART |
| 85 | |
| 86 | /* Set of debugging defines */ |
| 87 | |
| 88 | #undef SERIAL_DEBUG_INTR |
| 89 | #undef SERIAL_DEBUG_OPEN |
| 90 | #undef SERIAL_DEBUG_FLOW |
| 91 | #undef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT |
| 92 | |
| 93 | #define _INLINE_ inline |
| 94 | |
| 95 | #define DBG_CNT(s) |
| 96 | |
| 97 | /* We overload some of the items in the data structure to meet our |
| 98 | * needs. For example, the port address is the CPM parameter ram |
| 99 | * offset for the SCC or SMC. The maximum number of ports is 4 SCCs and |
| 100 | * 2 SMCs. The "hub6" field is used to indicate the channel number, with |
| 101 | * a flag indicating SCC or SMC, and the number is used as an index into |
| 102 | * the CPM parameter area for this device. |
| 103 | * The "type" field is currently set to 0, for PORT_UNKNOWN. It is |
| 104 | * not currently used. I should probably use it to indicate the port |
| 105 | * type of SMC or SCC. |
| 106 | * The SMCs do not support any modem control signals. |
| 107 | */ |
| 108 | #define smc_scc_num hub6 |
| 109 | #define NUM_IS_SCC ((int)0x00010000) |
| 110 | #define PORT_NUM(P) ((P) & 0x0000ffff) |
| 111 | |
| 112 | |
| 113 | #if defined (CONFIG_UCQUICC) |
| 114 | |
| 115 | volatile extern void *_periph_base; |
| 116 | /* sipex transceiver |
| 117 | * mode bits for are on pins |
| 118 | * |
| 119 | * SCC2 d16..19 |
| 120 | * SCC3 d20..23 |
| 121 | * SCC4 d24..27 |
| 122 | */ |
| 123 | #define SIPEX_MODE(n,m) ((m & 0x0f)<<(16+4*(n-1))) |
| 124 | |
| 125 | static uint sipex_mode_bits = 0x00000000; |
| 126 | |
| 127 | #endif |
| 128 | |
| 129 | /* There is no `serial_state' defined back here in 2.0. |
| 130 | * Try to get by with serial_struct |
| 131 | */ |
| 132 | /* #define serial_state serial_struct */ |
| 133 | |
| 134 | /* 2.4 -> 2.0 portability problem: async_icount in 2.4 has a few |
| 135 | * extras: */ |
| 136 | |
| 137 | #if 0 |
| 138 | struct async_icount_24 { |
| 139 | __u32 cts, dsr, rng, dcd, tx, rx; |
| 140 | __u32 frame, parity, overrun, brk; |
| 141 | __u32 buf_overrun; |
| 142 | } icount; |
| 143 | #endif |
| 144 | |
| 145 | #if 0 |
| 146 | |
| 147 | struct serial_state { |
| 148 | int magic; |
| 149 | int baud_base; |
| 150 | unsigned long port; |
| 151 | int irq; |
| 152 | int flags; |
| 153 | int hub6; |
| 154 | int type; |
| 155 | int line; |
| 156 | int revision; /* Chip revision (950) */ |
| 157 | int xmit_fifo_size; |
| 158 | int custom_divisor; |
| 159 | int count; |
| 160 | u8 *iomem_base; |
| 161 | u16 iomem_reg_shift; |
| 162 | unsigned short close_delay; |
| 163 | unsigned short closing_wait; /* time to wait before closing */ |
| 164 | struct async_icount_24 icount; |
| 165 | int io_type; |
| 166 | struct async_struct *info; |
| 167 | }; |
| 168 | #endif |
| 169 | |
| 170 | #define SSTATE_MAGIC 0x5302 |
| 171 | |
| 172 | |
| 173 | |
| 174 | /* SMC2 is sometimes used for low performance TDM interfaces. Define |
| 175 | * this as 1 if you want SMC2 as a serial port UART managed by this driver. |
| 176 | * Define this as 0 if you wish to use SMC2 for something else. |
| 177 | */ |
| 178 | #define USE_SMC2 1 |
| 179 | |
| 180 | #if 0 |
| 181 | /* Define SCC to ttySx mapping. */ |
| 182 | #define SCC_NUM_BASE (USE_SMC2 + 1) /* SCC base tty "number" */ |
| 183 | |
| 184 | /* Define which SCC is the first one to use for a serial port. These |
| 185 | * are 0-based numbers, i.e. this assumes the first SCC (SCC1) is used |
| 186 | * for Ethernet, and the first available SCC for serial UART is SCC2. |
| 187 | * NOTE: IF YOU CHANGE THIS, you have to change the PROFF_xxx and |
| 188 | * interrupt vectors in the table below to match. |
| 189 | */ |
| 190 | #define SCC_IDX_BASE 1 /* table index */ |
| 191 | #endif |
| 192 | |
| 193 | |
| 194 | /* Processors other than the 860 only get SMCs configured by default. |
| 195 | * Either they don't have SCCs or they are allocated somewhere else. |
| 196 | * Of course, there are now 860s without some SCCs, so we will need to |
| 197 | * address that someday. |
| 198 | * The Embedded Planet Multimedia I/O cards use TDM interfaces to the |
| 199 | * stereo codec parts, and we use SMC2 to help support that. |
| 200 | */ |
| 201 | static struct serial_state rs_table[] = { |
| 202 | /* type line PORT IRQ FLAGS smc_scc_num (F.K.A. hub6) */ |
| 203 | { 0, 0, PRSLOT_SMC1, CPMVEC_SMC1, 0, 0 } /* SMC1 ttyS0 */ |
| 204 | #if USE_SMC2 |
| 205 | ,{ 0, 0, PRSLOT_SMC2, CPMVEC_SMC2, 0, 1 } /* SMC2 ttyS1 */ |
| 206 | #endif |
| 207 | |
| 208 | #if defined(CONFIG_SERIAL_68360_SCC) |
| 209 | ,{ 0, 0, PRSLOT_SCC2, CPMVEC_SCC2, 0, (NUM_IS_SCC | 1) } /* SCC2 ttyS2 */ |
| 210 | ,{ 0, 0, PRSLOT_SCC3, CPMVEC_SCC3, 0, (NUM_IS_SCC | 2) } /* SCC3 ttyS3 */ |
| 211 | ,{ 0, 0, PRSLOT_SCC4, CPMVEC_SCC4, 0, (NUM_IS_SCC | 3) } /* SCC4 ttyS4 */ |
| 212 | #endif |
| 213 | }; |
| 214 | |
| 215 | #define NR_PORTS (sizeof(rs_table)/sizeof(struct serial_state)) |
| 216 | |
| 217 | /* The number of buffer descriptors and their sizes. |
| 218 | */ |
| 219 | #define RX_NUM_FIFO 4 |
| 220 | #define RX_BUF_SIZE 32 |
| 221 | #define TX_NUM_FIFO 4 |
| 222 | #define TX_BUF_SIZE 32 |
| 223 | |
| 224 | #define CONSOLE_NUM_FIFO 2 |
| 225 | #define CONSOLE_BUF_SIZE 4 |
| 226 | |
| 227 | char *console_fifos[CONSOLE_NUM_FIFO * CONSOLE_BUF_SIZE]; |
| 228 | |
| 229 | /* The async_struct in serial.h does not really give us what we |
| 230 | * need, so define our own here. |
| 231 | */ |
| 232 | typedef struct serial_info { |
| 233 | int magic; |
| 234 | int flags; |
| 235 | |
| 236 | struct serial_state *state; |
| 237 | /* struct serial_struct *state; */ |
| 238 | /* struct async_struct *state; */ |
| 239 | |
| 240 | struct tty_struct *tty; |
| 241 | int read_status_mask; |
| 242 | int ignore_status_mask; |
| 243 | int timeout; |
| 244 | int line; |
| 245 | int x_char; /* xon/xoff character */ |
| 246 | int close_delay; |
| 247 | unsigned short closing_wait; |
| 248 | unsigned short closing_wait2; |
| 249 | unsigned long event; |
| 250 | unsigned long last_active; |
| 251 | int blocked_open; /* # of blocked opens */ |
| 252 | struct work_struct tqueue; |
| 253 | struct work_struct tqueue_hangup; |
| 254 | wait_queue_head_t open_wait; |
| 255 | wait_queue_head_t close_wait; |
| 256 | |
| 257 | |
| 258 | /* CPM Buffer Descriptor pointers. |
| 259 | */ |
| 260 | QUICC_BD *rx_bd_base; |
| 261 | QUICC_BD *rx_cur; |
| 262 | QUICC_BD *tx_bd_base; |
| 263 | QUICC_BD *tx_cur; |
| 264 | } ser_info_t; |
| 265 | |
| 266 | |
| 267 | /* since kmalloc_init() does not get called until much after this initialization: */ |
| 268 | static ser_info_t quicc_ser_info[NR_PORTS]; |
| 269 | static char rx_buf_pool[NR_PORTS * RX_NUM_FIFO * RX_BUF_SIZE]; |
| 270 | static char tx_buf_pool[NR_PORTS * TX_NUM_FIFO * TX_BUF_SIZE]; |
| 271 | |
| 272 | static void change_speed(ser_info_t *info); |
| 273 | static void rs_360_wait_until_sent(struct tty_struct *tty, int timeout); |
| 274 | |
| 275 | static inline int serial_paranoia_check(ser_info_t *info, |
| 276 | char *name, const char *routine) |
| 277 | { |
| 278 | #ifdef SERIAL_PARANOIA_CHECK |
| 279 | static const char *badmagic = |
| 280 | "Warning: bad magic number for serial struct (%s) in %s\n"; |
| 281 | static const char *badinfo = |
| 282 | "Warning: null async_struct for (%s) in %s\n"; |
| 283 | |
| 284 | if (!info) { |
| 285 | printk(badinfo, name, routine); |
| 286 | return 1; |
| 287 | } |
| 288 | if (info->magic != SERIAL_MAGIC) { |
| 289 | printk(badmagic, name, routine); |
| 290 | return 1; |
| 291 | } |
| 292 | #endif |
| 293 | return 0; |
| 294 | } |
| 295 | |
| 296 | /* |
| 297 | * This is used to figure out the divisor speeds and the timeouts, |
| 298 | * indexed by the termio value. The generic CPM functions are responsible |
| 299 | * for setting and assigning baud rate generators for us. |
| 300 | */ |
| 301 | static int baud_table[] = { |
| 302 | 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800, |
| 303 | 9600, 19200, 38400, 57600, 115200, 230400, 460800, 0 }; |
| 304 | |
| 305 | /* This sucks. There is a better way: */ |
| 306 | #if defined(CONFIG_CONSOLE_9600) |
| 307 | #define CONSOLE_BAUDRATE 9600 |
| 308 | #elif defined(CONFIG_CONSOLE_19200) |
| 309 | #define CONSOLE_BAUDRATE 19200 |
| 310 | #elif defined(CONFIG_CONSOLE_115200) |
| 311 | #define CONSOLE_BAUDRATE 115200 |
| 312 | #else |
| 313 | #warning "console baud rate undefined" |
| 314 | #define CONSOLE_BAUDRATE 9600 |
| 315 | #endif |
| 316 | |
| 317 | /* |
| 318 | * ------------------------------------------------------------ |
| 319 | * rs_stop() and rs_start() |
| 320 | * |
| 321 | * This routines are called before setting or resetting tty->stopped. |
| 322 | * They enable or disable transmitter interrupts, as necessary. |
| 323 | * ------------------------------------------------------------ |
| 324 | */ |
| 325 | static void rs_360_stop(struct tty_struct *tty) |
| 326 | { |
| 327 | ser_info_t *info = (ser_info_t *)tty->driver_data; |
| 328 | int idx; |
| 329 | unsigned long flags; |
| 330 | volatile struct scc_regs *sccp; |
| 331 | volatile struct smc_regs *smcp; |
| 332 | |
| 333 | if (serial_paranoia_check(info, tty->name, "rs_stop")) |
| 334 | return; |
| 335 | |
| 336 | local_irq_save(flags); |
| 337 | idx = PORT_NUM(info->state->smc_scc_num); |
| 338 | if (info->state->smc_scc_num & NUM_IS_SCC) { |
| 339 | sccp = &pquicc->scc_regs[idx]; |
| 340 | sccp->scc_sccm &= ~UART_SCCM_TX; |
| 341 | } else { |
| 342 | /* smcp = &cpmp->cp_smc[idx]; */ |
| 343 | smcp = &pquicc->smc_regs[idx]; |
| 344 | smcp->smc_smcm &= ~SMCM_TX; |
| 345 | } |
| 346 | local_irq_restore(flags); |
| 347 | } |
| 348 | |
| 349 | |
| 350 | static void rs_360_start(struct tty_struct *tty) |
| 351 | { |
| 352 | ser_info_t *info = (ser_info_t *)tty->driver_data; |
| 353 | int idx; |
| 354 | unsigned long flags; |
| 355 | volatile struct scc_regs *sccp; |
| 356 | volatile struct smc_regs *smcp; |
| 357 | |
| 358 | if (serial_paranoia_check(info, tty->name, "rs_stop")) |
| 359 | return; |
| 360 | |
| 361 | local_irq_save(flags); |
| 362 | idx = PORT_NUM(info->state->smc_scc_num); |
| 363 | if (info->state->smc_scc_num & NUM_IS_SCC) { |
| 364 | sccp = &pquicc->scc_regs[idx]; |
| 365 | sccp->scc_sccm |= UART_SCCM_TX; |
| 366 | } else { |
| 367 | smcp = &pquicc->smc_regs[idx]; |
| 368 | smcp->smc_smcm |= SMCM_TX; |
| 369 | } |
| 370 | local_irq_restore(flags); |
| 371 | } |
| 372 | |
| 373 | /* |
| 374 | * ---------------------------------------------------------------------- |
| 375 | * |
| 376 | * Here starts the interrupt handling routines. All of the following |
| 377 | * subroutines are declared as inline and are folded into |
| 378 | * rs_interrupt(). They were separated out for readability's sake. |
| 379 | * |
| 380 | * Note: rs_interrupt() is a "fast" interrupt, which means that it |
| 381 | * runs with interrupts turned off. People who may want to modify |
| 382 | * rs_interrupt() should try to keep the interrupt handler as fast as |
| 383 | * possible. After you are done making modifications, it is not a bad |
| 384 | * idea to do: |
| 385 | * |
| 386 | * gcc -S -DKERNEL -Wall -Wstrict-prototypes -O6 -fomit-frame-pointer serial.c |
| 387 | * |
| 388 | * and look at the resulting assemble code in serial.s. |
| 389 | * |
| 390 | * - Ted Ts'o (tytso@mit.edu), 7-Mar-93 |
| 391 | * ----------------------------------------------------------------------- |
| 392 | */ |
| 393 | |
| 394 | static _INLINE_ void receive_chars(ser_info_t *info) |
| 395 | { |
| 396 | struct tty_struct *tty = info->tty; |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 397 | unsigned char ch, flag, *cp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 398 | /*int ignored = 0;*/ |
| 399 | int i; |
| 400 | ushort status; |
| 401 | struct async_icount *icount; |
| 402 | /* struct async_icount_24 *icount; */ |
| 403 | volatile QUICC_BD *bdp; |
| 404 | |
| 405 | icount = &info->state->icount; |
| 406 | |
| 407 | /* Just loop through the closed BDs and copy the characters into |
| 408 | * the buffer. |
| 409 | */ |
| 410 | bdp = info->rx_cur; |
| 411 | for (;;) { |
| 412 | if (bdp->status & BD_SC_EMPTY) /* If this one is empty */ |
| 413 | break; /* we are all done */ |
| 414 | |
| 415 | /* The read status mask tell us what we should do with |
| 416 | * incoming characters, especially if errors occur. |
| 417 | * One special case is the use of BD_SC_EMPTY. If |
| 418 | * this is not set, we are supposed to be ignoring |
| 419 | * inputs. In this case, just mark the buffer empty and |
| 420 | * continue. |
| 421 | */ |
| 422 | if (!(info->read_status_mask & BD_SC_EMPTY)) { |
| 423 | bdp->status |= BD_SC_EMPTY; |
| 424 | bdp->status &= |
| 425 | ~(BD_SC_BR | BD_SC_FR | BD_SC_PR | BD_SC_OV); |
| 426 | |
| 427 | if (bdp->status & BD_SC_WRAP) |
| 428 | bdp = info->rx_bd_base; |
| 429 | else |
| 430 | bdp++; |
| 431 | continue; |
| 432 | } |
| 433 | |
| 434 | /* Get the number of characters and the buffer pointer. |
| 435 | */ |
| 436 | i = bdp->length; |
| 437 | /* cp = (unsigned char *)__va(bdp->buf); */ |
| 438 | cp = (char *)bdp->buf; |
| 439 | status = bdp->status; |
| 440 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 441 | while (i-- > 0) { |
| 442 | ch = *cp++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 443 | icount->rx++; |
| 444 | |
| 445 | #ifdef SERIAL_DEBUG_INTR |
| 446 | printk("DR%02x:%02x...", ch, status); |
| 447 | #endif |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 448 | flag = TTY_NORMAL; |
| 449 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | if (status & (BD_SC_BR | BD_SC_FR | |
| 451 | BD_SC_PR | BD_SC_OV)) { |
| 452 | /* |
| 453 | * For statistics only |
| 454 | */ |
| 455 | if (status & BD_SC_BR) |
| 456 | icount->brk++; |
| 457 | else if (status & BD_SC_PR) |
| 458 | icount->parity++; |
| 459 | else if (status & BD_SC_FR) |
| 460 | icount->frame++; |
| 461 | if (status & BD_SC_OV) |
| 462 | icount->overrun++; |
| 463 | |
| 464 | /* |
| 465 | * Now check to see if character should be |
| 466 | * ignored, and mask off conditions which |
| 467 | * should be ignored. |
| 468 | if (status & info->ignore_status_mask) { |
| 469 | if (++ignored > 100) |
| 470 | break; |
| 471 | continue; |
| 472 | } |
| 473 | */ |
| 474 | status &= info->read_status_mask; |
| 475 | |
| 476 | if (status & (BD_SC_BR)) { |
| 477 | #ifdef SERIAL_DEBUG_INTR |
| 478 | printk("handling break...."); |
| 479 | #endif |
| 480 | *tty->flip.flag_buf_ptr = TTY_BREAK; |
| 481 | if (info->flags & ASYNC_SAK) |
| 482 | do_SAK(tty); |
| 483 | } else if (status & BD_SC_PR) |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 484 | flag = TTY_PARITY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 485 | else if (status & BD_SC_FR) |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 486 | flag = TTY_FRAME; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 487 | } |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 488 | tty_insert_flip_char(tty, ch, flag); |
| 489 | if (status & BD_SC_OV) |
| 490 | /* |
| 491 | * Overrun is special, since it's |
| 492 | * reported immediately, and doesn't |
| 493 | * affect the current character |
| 494 | */ |
| 495 | tty_insert_flip_char(tty, 0, TTY_OVERRUN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 496 | } |
| 497 | |
| 498 | /* This BD is ready to be used again. Clear status. |
| 499 | * Get next BD. |
| 500 | */ |
| 501 | bdp->status |= BD_SC_EMPTY; |
| 502 | bdp->status &= ~(BD_SC_BR | BD_SC_FR | BD_SC_PR | BD_SC_OV); |
| 503 | |
| 504 | if (bdp->status & BD_SC_WRAP) |
| 505 | bdp = info->rx_bd_base; |
| 506 | else |
| 507 | bdp++; |
| 508 | } |
| 509 | |
| 510 | info->rx_cur = (QUICC_BD *)bdp; |
| 511 | |
Greg Ungerer | e394856 | 2006-02-08 09:19:17 +1000 | [diff] [blame] | 512 | tty_schedule_flip(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 513 | } |
| 514 | |
| 515 | static _INLINE_ void receive_break(ser_info_t *info) |
| 516 | { |
| 517 | struct tty_struct *tty = info->tty; |
| 518 | |
| 519 | info->state->icount.brk++; |
| 520 | /* Check to see if there is room in the tty buffer for |
| 521 | * the break. If not, we exit now, losing the break. FIXME |
| 522 | */ |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 523 | tty_insert_flip_char(tty, 0, TTY_BREAK); |
Greg Ungerer | e394856 | 2006-02-08 09:19:17 +1000 | [diff] [blame] | 524 | tty_schedule_flip(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 525 | } |
| 526 | |
| 527 | static _INLINE_ void transmit_chars(ser_info_t *info) |
| 528 | { |
| 529 | |
| 530 | if ((info->flags & TX_WAKEUP) || |
| 531 | (info->tty->flags & (1 << TTY_DO_WRITE_WAKEUP))) { |
| 532 | schedule_work(&info->tqueue); |
| 533 | } |
| 534 | |
| 535 | #ifdef SERIAL_DEBUG_INTR |
| 536 | printk("THRE..."); |
| 537 | #endif |
| 538 | } |
| 539 | |
| 540 | #ifdef notdef |
| 541 | /* I need to do this for the SCCs, so it is left as a reminder. |
| 542 | */ |
| 543 | static _INLINE_ void check_modem_status(struct async_struct *info) |
| 544 | { |
| 545 | int status; |
| 546 | /* struct async_icount *icount; */ |
| 547 | struct async_icount_24 *icount; |
| 548 | |
| 549 | status = serial_in(info, UART_MSR); |
| 550 | |
| 551 | if (status & UART_MSR_ANY_DELTA) { |
| 552 | icount = &info->state->icount; |
| 553 | /* update input line counters */ |
| 554 | if (status & UART_MSR_TERI) |
| 555 | icount->rng++; |
| 556 | if (status & UART_MSR_DDSR) |
| 557 | icount->dsr++; |
| 558 | if (status & UART_MSR_DDCD) { |
| 559 | icount->dcd++; |
| 560 | #ifdef CONFIG_HARD_PPS |
| 561 | if ((info->flags & ASYNC_HARDPPS_CD) && |
| 562 | (status & UART_MSR_DCD)) |
| 563 | hardpps(); |
| 564 | #endif |
| 565 | } |
| 566 | if (status & UART_MSR_DCTS) |
| 567 | icount->cts++; |
| 568 | wake_up_interruptible(&info->delta_msr_wait); |
| 569 | } |
| 570 | |
| 571 | if ((info->flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) { |
| 572 | #if (defined(SERIAL_DEBUG_OPEN) || defined(SERIAL_DEBUG_INTR)) |
| 573 | printk("ttys%d CD now %s...", info->line, |
| 574 | (status & UART_MSR_DCD) ? "on" : "off"); |
| 575 | #endif |
| 576 | if (status & UART_MSR_DCD) |
| 577 | wake_up_interruptible(&info->open_wait); |
| 578 | else { |
| 579 | #ifdef SERIAL_DEBUG_OPEN |
| 580 | printk("scheduling hangup..."); |
| 581 | #endif |
| 582 | queue_task(&info->tqueue_hangup, |
| 583 | &tq_scheduler); |
| 584 | } |
| 585 | } |
| 586 | if (info->flags & ASYNC_CTS_FLOW) { |
| 587 | if (info->tty->hw_stopped) { |
| 588 | if (status & UART_MSR_CTS) { |
| 589 | #if (defined(SERIAL_DEBUG_INTR) || defined(SERIAL_DEBUG_FLOW)) |
| 590 | printk("CTS tx start..."); |
| 591 | #endif |
| 592 | info->tty->hw_stopped = 0; |
| 593 | info->IER |= UART_IER_THRI; |
| 594 | serial_out(info, UART_IER, info->IER); |
| 595 | rs_sched_event(info, RS_EVENT_WRITE_WAKEUP); |
| 596 | return; |
| 597 | } |
| 598 | } else { |
| 599 | if (!(status & UART_MSR_CTS)) { |
| 600 | #if (defined(SERIAL_DEBUG_INTR) || defined(SERIAL_DEBUG_FLOW)) |
| 601 | printk("CTS tx stop..."); |
| 602 | #endif |
| 603 | info->tty->hw_stopped = 1; |
| 604 | info->IER &= ~UART_IER_THRI; |
| 605 | serial_out(info, UART_IER, info->IER); |
| 606 | } |
| 607 | } |
| 608 | } |
| 609 | } |
| 610 | #endif |
| 611 | |
| 612 | /* |
| 613 | * This is the serial driver's interrupt routine for a single port |
| 614 | */ |
| 615 | /* static void rs_360_interrupt(void *dev_id) */ /* until and if we start servicing irqs here */ |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 616 | static void rs_360_interrupt(int vec, void *dev_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 617 | { |
| 618 | u_char events; |
| 619 | int idx; |
| 620 | ser_info_t *info; |
| 621 | volatile struct smc_regs *smcp; |
| 622 | volatile struct scc_regs *sccp; |
| 623 | |
Jeff Garzik | c7bec5a | 2006-10-06 15:00:58 -0400 | [diff] [blame] | 624 | info = dev_id; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 625 | |
| 626 | idx = PORT_NUM(info->state->smc_scc_num); |
| 627 | if (info->state->smc_scc_num & NUM_IS_SCC) { |
| 628 | sccp = &pquicc->scc_regs[idx]; |
| 629 | events = sccp->scc_scce; |
| 630 | if (events & SCCM_RX) |
| 631 | receive_chars(info); |
| 632 | if (events & SCCM_TX) |
| 633 | transmit_chars(info); |
| 634 | sccp->scc_scce = events; |
| 635 | } else { |
| 636 | smcp = &pquicc->smc_regs[idx]; |
| 637 | events = smcp->smc_smce; |
| 638 | if (events & SMCM_BRKE) |
| 639 | receive_break(info); |
| 640 | if (events & SMCM_RX) |
| 641 | receive_chars(info); |
| 642 | if (events & SMCM_TX) |
| 643 | transmit_chars(info); |
| 644 | smcp->smc_smce = events; |
| 645 | } |
| 646 | |
| 647 | #ifdef SERIAL_DEBUG_INTR |
| 648 | printk("rs_interrupt_single(%d, %x)...", |
| 649 | info->state->smc_scc_num, events); |
| 650 | #endif |
| 651 | #ifdef modem_control |
| 652 | check_modem_status(info); |
| 653 | #endif |
| 654 | info->last_active = jiffies; |
| 655 | #ifdef SERIAL_DEBUG_INTR |
| 656 | printk("end.\n"); |
| 657 | #endif |
| 658 | } |
| 659 | |
| 660 | |
| 661 | /* |
| 662 | * ------------------------------------------------------------------- |
| 663 | * Here ends the serial interrupt routines. |
| 664 | * ------------------------------------------------------------------- |
| 665 | */ |
| 666 | |
| 667 | |
| 668 | static void do_softint(void *private_) |
| 669 | { |
| 670 | ser_info_t *info = (ser_info_t *) private_; |
| 671 | struct tty_struct *tty; |
| 672 | |
| 673 | tty = info->tty; |
| 674 | if (!tty) |
| 675 | return; |
| 676 | |
| 677 | if (test_and_clear_bit(RS_EVENT_WRITE_WAKEUP, &info->event)) |
| 678 | tty_wakeup(tty); |
| 679 | } |
| 680 | |
| 681 | |
| 682 | /* |
| 683 | * This routine is called from the scheduler tqueue when the interrupt |
| 684 | * routine has signalled that a hangup has occurred. The path of |
| 685 | * hangup processing is: |
| 686 | * |
| 687 | * serial interrupt routine -> (scheduler tqueue) -> |
| 688 | * do_serial_hangup() -> tty->hangup() -> rs_hangup() |
| 689 | * |
| 690 | */ |
| 691 | static void do_serial_hangup(void *private_) |
| 692 | { |
| 693 | struct async_struct *info = (struct async_struct *) private_; |
| 694 | struct tty_struct *tty; |
| 695 | |
| 696 | tty = info->tty; |
| 697 | if (!tty) |
| 698 | return; |
| 699 | |
| 700 | tty_hangup(tty); |
| 701 | } |
| 702 | |
| 703 | |
| 704 | static int startup(ser_info_t *info) |
| 705 | { |
| 706 | unsigned long flags; |
| 707 | int retval=0; |
| 708 | int idx; |
| 709 | /*struct serial_state *state = info->state;*/ |
| 710 | volatile struct smc_regs *smcp; |
| 711 | volatile struct scc_regs *sccp; |
| 712 | volatile struct smc_uart_pram *up; |
| 713 | volatile struct uart_pram *scup; |
| 714 | |
| 715 | |
| 716 | local_irq_save(flags); |
| 717 | |
| 718 | if (info->flags & ASYNC_INITIALIZED) { |
| 719 | goto errout; |
| 720 | } |
| 721 | |
| 722 | #ifdef maybe |
| 723 | if (!state->port || !state->type) { |
| 724 | if (info->tty) |
| 725 | set_bit(TTY_IO_ERROR, &info->tty->flags); |
| 726 | goto errout; |
| 727 | } |
| 728 | #endif |
| 729 | |
| 730 | #ifdef SERIAL_DEBUG_OPEN |
| 731 | printk("starting up ttys%d (irq %d)...", info->line, state->irq); |
| 732 | #endif |
| 733 | |
| 734 | |
| 735 | #ifdef modem_control |
| 736 | info->MCR = 0; |
| 737 | if (info->tty->termios->c_cflag & CBAUD) |
| 738 | info->MCR = UART_MCR_DTR | UART_MCR_RTS; |
| 739 | #endif |
| 740 | |
| 741 | if (info->tty) |
| 742 | clear_bit(TTY_IO_ERROR, &info->tty->flags); |
| 743 | |
| 744 | /* |
| 745 | * and set the speed of the serial port |
| 746 | */ |
| 747 | change_speed(info); |
| 748 | |
| 749 | idx = PORT_NUM(info->state->smc_scc_num); |
| 750 | if (info->state->smc_scc_num & NUM_IS_SCC) { |
| 751 | sccp = &pquicc->scc_regs[idx]; |
| 752 | scup = &pquicc->pram[info->state->port].scc.pscc.u; |
| 753 | |
| 754 | scup->mrblr = RX_BUF_SIZE; |
| 755 | scup->max_idl = RX_BUF_SIZE; |
| 756 | |
| 757 | sccp->scc_sccm |= (UART_SCCM_TX | UART_SCCM_RX); |
| 758 | sccp->scc_gsmr.w.low |= (SCC_GSMRL_ENR | SCC_GSMRL_ENT); |
| 759 | |
| 760 | } else { |
| 761 | smcp = &pquicc->smc_regs[idx]; |
| 762 | |
| 763 | /* Enable interrupts and I/O. |
| 764 | */ |
| 765 | smcp->smc_smcm |= (SMCM_RX | SMCM_TX); |
| 766 | smcp->smc_smcmr |= (SMCMR_REN | SMCMR_TEN); |
| 767 | |
| 768 | /* We can tune the buffer length and idle characters |
| 769 | * to take advantage of the entire incoming buffer size. |
| 770 | * If mrblr is something other than 1, maxidl has to be |
| 771 | * non-zero or we never get an interrupt. The maxidl |
| 772 | * is the number of character times we wait after reception |
| 773 | * of the last character before we decide no more characters |
| 774 | * are coming. |
| 775 | */ |
| 776 | /* up = (smc_uart_t *)&pquicc->cp_dparam[state->port]; */ |
| 777 | /* holy unionized structures, Batman: */ |
| 778 | up = &pquicc->pram[info->state->port].scc.pothers.idma_smc.psmc.u; |
| 779 | |
| 780 | up->mrblr = RX_BUF_SIZE; |
| 781 | up->max_idl = RX_BUF_SIZE; |
| 782 | |
| 783 | up->brkcr = 1; /* number of break chars */ |
| 784 | } |
| 785 | |
| 786 | info->flags |= ASYNC_INITIALIZED; |
| 787 | local_irq_restore(flags); |
| 788 | return 0; |
| 789 | |
| 790 | errout: |
| 791 | local_irq_restore(flags); |
| 792 | return retval; |
| 793 | } |
| 794 | |
| 795 | /* |
| 796 | * This routine will shutdown a serial port; interrupts are disabled, and |
| 797 | * DTR is dropped if the hangup on close termio flag is on. |
| 798 | */ |
| 799 | static void shutdown(ser_info_t *info) |
| 800 | { |
| 801 | unsigned long flags; |
| 802 | struct serial_state *state; |
| 803 | int idx; |
| 804 | volatile struct smc_regs *smcp; |
| 805 | volatile struct scc_regs *sccp; |
| 806 | |
| 807 | if (!(info->flags & ASYNC_INITIALIZED)) |
| 808 | return; |
| 809 | |
| 810 | state = info->state; |
| 811 | |
| 812 | #ifdef SERIAL_DEBUG_OPEN |
| 813 | printk("Shutting down serial port %d (irq %d)....", info->line, |
| 814 | state->irq); |
| 815 | #endif |
| 816 | |
| 817 | local_irq_save(flags); |
| 818 | |
| 819 | idx = PORT_NUM(state->smc_scc_num); |
| 820 | if (state->smc_scc_num & NUM_IS_SCC) { |
| 821 | sccp = &pquicc->scc_regs[idx]; |
| 822 | sccp->scc_gsmr.w.low &= ~(SCC_GSMRL_ENR | SCC_GSMRL_ENT); |
| 823 | #ifdef CONFIG_SERIAL_CONSOLE |
| 824 | /* We can't disable the transmitter if this is the |
| 825 | * system console. |
| 826 | */ |
| 827 | if ((state - rs_table) != CONFIG_SERIAL_CONSOLE_PORT) |
| 828 | #endif |
| 829 | sccp->scc_sccm &= ~(UART_SCCM_TX | UART_SCCM_RX); |
| 830 | } else { |
| 831 | smcp = &pquicc->smc_regs[idx]; |
| 832 | |
| 833 | /* Disable interrupts and I/O. |
| 834 | */ |
| 835 | smcp->smc_smcm &= ~(SMCM_RX | SMCM_TX); |
| 836 | #ifdef CONFIG_SERIAL_CONSOLE |
| 837 | /* We can't disable the transmitter if this is the |
| 838 | * system console. |
| 839 | */ |
| 840 | if ((state - rs_table) != CONFIG_SERIAL_CONSOLE_PORT) |
| 841 | #endif |
| 842 | smcp->smc_smcmr &= ~(SMCMR_REN | SMCMR_TEN); |
| 843 | } |
| 844 | |
| 845 | if (info->tty) |
| 846 | set_bit(TTY_IO_ERROR, &info->tty->flags); |
| 847 | |
| 848 | info->flags &= ~ASYNC_INITIALIZED; |
| 849 | local_irq_restore(flags); |
| 850 | } |
| 851 | |
| 852 | /* |
| 853 | * This routine is called to set the UART divisor registers to match |
| 854 | * the specified baud rate for a serial port. |
| 855 | */ |
| 856 | static void change_speed(ser_info_t *info) |
| 857 | { |
| 858 | int baud_rate; |
| 859 | unsigned cflag, cval, scval, prev_mode; |
| 860 | int i, bits, sbits, idx; |
| 861 | unsigned long flags; |
| 862 | struct serial_state *state; |
| 863 | volatile struct smc_regs *smcp; |
| 864 | volatile struct scc_regs *sccp; |
| 865 | |
| 866 | if (!info->tty || !info->tty->termios) |
| 867 | return; |
| 868 | cflag = info->tty->termios->c_cflag; |
| 869 | |
| 870 | state = info->state; |
| 871 | |
| 872 | /* Character length programmed into the mode register is the |
| 873 | * sum of: 1 start bit, number of data bits, 0 or 1 parity bit, |
| 874 | * 1 or 2 stop bits, minus 1. |
| 875 | * The value 'bits' counts this for us. |
| 876 | */ |
| 877 | cval = 0; |
| 878 | scval = 0; |
| 879 | |
| 880 | /* byte size and parity */ |
| 881 | switch (cflag & CSIZE) { |
| 882 | case CS5: bits = 5; break; |
| 883 | case CS6: bits = 6; break; |
| 884 | case CS7: bits = 7; break; |
| 885 | case CS8: bits = 8; break; |
| 886 | /* Never happens, but GCC is too dumb to figure it out */ |
| 887 | default: bits = 8; break; |
| 888 | } |
| 889 | sbits = bits - 5; |
| 890 | |
| 891 | if (cflag & CSTOPB) { |
| 892 | cval |= SMCMR_SL; /* Two stops */ |
| 893 | scval |= SCU_PMSR_SL; |
| 894 | bits++; |
| 895 | } |
| 896 | if (cflag & PARENB) { |
| 897 | cval |= SMCMR_PEN; |
| 898 | scval |= SCU_PMSR_PEN; |
| 899 | bits++; |
| 900 | } |
| 901 | if (!(cflag & PARODD)) { |
| 902 | cval |= SMCMR_PM_EVEN; |
| 903 | scval |= (SCU_PMSR_REVP | SCU_PMSR_TEVP); |
| 904 | } |
| 905 | |
| 906 | /* Determine divisor based on baud rate */ |
| 907 | i = cflag & CBAUD; |
| 908 | if (i >= (sizeof(baud_table)/sizeof(int))) |
| 909 | baud_rate = 9600; |
| 910 | else |
| 911 | baud_rate = baud_table[i]; |
| 912 | |
| 913 | info->timeout = (TX_BUF_SIZE*HZ*bits); |
| 914 | info->timeout += HZ/50; /* Add .02 seconds of slop */ |
| 915 | |
| 916 | #ifdef modem_control |
| 917 | /* CTS flow control flag and modem status interrupts */ |
| 918 | info->IER &= ~UART_IER_MSI; |
| 919 | if (info->flags & ASYNC_HARDPPS_CD) |
| 920 | info->IER |= UART_IER_MSI; |
| 921 | if (cflag & CRTSCTS) { |
| 922 | info->flags |= ASYNC_CTS_FLOW; |
| 923 | info->IER |= UART_IER_MSI; |
| 924 | } else |
| 925 | info->flags &= ~ASYNC_CTS_FLOW; |
| 926 | if (cflag & CLOCAL) |
| 927 | info->flags &= ~ASYNC_CHECK_CD; |
| 928 | else { |
| 929 | info->flags |= ASYNC_CHECK_CD; |
| 930 | info->IER |= UART_IER_MSI; |
| 931 | } |
| 932 | serial_out(info, UART_IER, info->IER); |
| 933 | #endif |
| 934 | |
| 935 | /* |
| 936 | * Set up parity check flag |
| 937 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 938 | info->read_status_mask = (BD_SC_EMPTY | BD_SC_OV); |
| 939 | if (I_INPCK(info->tty)) |
| 940 | info->read_status_mask |= BD_SC_FR | BD_SC_PR; |
| 941 | if (I_BRKINT(info->tty) || I_PARMRK(info->tty)) |
| 942 | info->read_status_mask |= BD_SC_BR; |
| 943 | |
| 944 | /* |
| 945 | * Characters to ignore |
| 946 | */ |
| 947 | info->ignore_status_mask = 0; |
| 948 | if (I_IGNPAR(info->tty)) |
| 949 | info->ignore_status_mask |= BD_SC_PR | BD_SC_FR; |
| 950 | if (I_IGNBRK(info->tty)) { |
| 951 | info->ignore_status_mask |= BD_SC_BR; |
| 952 | /* |
| 953 | * If we're ignore parity and break indicators, ignore |
| 954 | * overruns too. (For real raw support). |
| 955 | */ |
| 956 | if (I_IGNPAR(info->tty)) |
| 957 | info->ignore_status_mask |= BD_SC_OV; |
| 958 | } |
| 959 | /* |
| 960 | * !!! ignore all characters if CREAD is not set |
| 961 | */ |
| 962 | if ((cflag & CREAD) == 0) |
| 963 | info->read_status_mask &= ~BD_SC_EMPTY; |
| 964 | local_irq_save(flags); |
| 965 | |
| 966 | /* Start bit has not been added (so don't, because we would just |
| 967 | * subtract it later), and we need to add one for the number of |
| 968 | * stops bits (there is always at least one). |
| 969 | */ |
| 970 | bits++; |
| 971 | idx = PORT_NUM(state->smc_scc_num); |
| 972 | if (state->smc_scc_num & NUM_IS_SCC) { |
| 973 | sccp = &pquicc->scc_regs[idx]; |
| 974 | sccp->scc_psmr = (sbits << 12) | scval; |
| 975 | } else { |
| 976 | smcp = &pquicc->smc_regs[idx]; |
| 977 | |
| 978 | /* Set the mode register. We want to keep a copy of the |
| 979 | * enables, because we want to put them back if they were |
| 980 | * present. |
| 981 | */ |
| 982 | prev_mode = smcp->smc_smcmr; |
| 983 | smcp->smc_smcmr = smcr_mk_clen(bits) | cval | SMCMR_SM_UART; |
| 984 | smcp->smc_smcmr |= (prev_mode & (SMCMR_REN | SMCMR_TEN)); |
| 985 | } |
| 986 | |
| 987 | m360_cpm_setbrg((state - rs_table), baud_rate); |
| 988 | |
| 989 | local_irq_restore(flags); |
| 990 | } |
| 991 | |
| 992 | static void rs_360_put_char(struct tty_struct *tty, unsigned char ch) |
| 993 | { |
| 994 | ser_info_t *info = (ser_info_t *)tty->driver_data; |
| 995 | volatile QUICC_BD *bdp; |
| 996 | |
| 997 | if (serial_paranoia_check(info, tty->name, "rs_put_char")) |
| 998 | return; |
| 999 | |
| 1000 | if (!tty) |
| 1001 | return; |
| 1002 | |
| 1003 | bdp = info->tx_cur; |
| 1004 | while (bdp->status & BD_SC_READY); |
| 1005 | |
| 1006 | /* *((char *)__va(bdp->buf)) = ch; */ |
| 1007 | *((char *)bdp->buf) = ch; |
| 1008 | bdp->length = 1; |
| 1009 | bdp->status |= BD_SC_READY; |
| 1010 | |
| 1011 | /* Get next BD. |
| 1012 | */ |
| 1013 | if (bdp->status & BD_SC_WRAP) |
| 1014 | bdp = info->tx_bd_base; |
| 1015 | else |
| 1016 | bdp++; |
| 1017 | |
| 1018 | info->tx_cur = (QUICC_BD *)bdp; |
| 1019 | |
| 1020 | } |
| 1021 | |
| 1022 | static int rs_360_write(struct tty_struct * tty, |
| 1023 | const unsigned char *buf, int count) |
| 1024 | { |
| 1025 | int c, ret = 0; |
| 1026 | ser_info_t *info = (ser_info_t *)tty->driver_data; |
| 1027 | volatile QUICC_BD *bdp; |
| 1028 | |
| 1029 | #ifdef CONFIG_KGDB |
| 1030 | /* Try to let stub handle output. Returns true if it did. */ |
| 1031 | if (kgdb_output_string(buf, count)) |
| 1032 | return ret; |
| 1033 | #endif |
| 1034 | |
| 1035 | if (serial_paranoia_check(info, tty->name, "rs_write")) |
| 1036 | return 0; |
| 1037 | |
| 1038 | if (!tty) |
| 1039 | return 0; |
| 1040 | |
| 1041 | bdp = info->tx_cur; |
| 1042 | |
| 1043 | while (1) { |
| 1044 | c = min(count, TX_BUF_SIZE); |
| 1045 | |
| 1046 | if (c <= 0) |
| 1047 | break; |
| 1048 | |
| 1049 | if (bdp->status & BD_SC_READY) { |
| 1050 | info->flags |= TX_WAKEUP; |
| 1051 | break; |
| 1052 | } |
| 1053 | |
| 1054 | /* memcpy(__va(bdp->buf), buf, c); */ |
| 1055 | memcpy((void *)bdp->buf, buf, c); |
| 1056 | |
| 1057 | bdp->length = c; |
| 1058 | bdp->status |= BD_SC_READY; |
| 1059 | |
| 1060 | buf += c; |
| 1061 | count -= c; |
| 1062 | ret += c; |
| 1063 | |
| 1064 | /* Get next BD. |
| 1065 | */ |
| 1066 | if (bdp->status & BD_SC_WRAP) |
| 1067 | bdp = info->tx_bd_base; |
| 1068 | else |
| 1069 | bdp++; |
| 1070 | info->tx_cur = (QUICC_BD *)bdp; |
| 1071 | } |
| 1072 | return ret; |
| 1073 | } |
| 1074 | |
| 1075 | static int rs_360_write_room(struct tty_struct *tty) |
| 1076 | { |
| 1077 | ser_info_t *info = (ser_info_t *)tty->driver_data; |
| 1078 | int ret; |
| 1079 | |
| 1080 | if (serial_paranoia_check(info, tty->name, "rs_write_room")) |
| 1081 | return 0; |
| 1082 | |
| 1083 | if ((info->tx_cur->status & BD_SC_READY) == 0) { |
| 1084 | info->flags &= ~TX_WAKEUP; |
| 1085 | ret = TX_BUF_SIZE; |
| 1086 | } |
| 1087 | else { |
| 1088 | info->flags |= TX_WAKEUP; |
| 1089 | ret = 0; |
| 1090 | } |
| 1091 | return ret; |
| 1092 | } |
| 1093 | |
| 1094 | /* I could track this with transmit counters....maybe later. |
| 1095 | */ |
| 1096 | static int rs_360_chars_in_buffer(struct tty_struct *tty) |
| 1097 | { |
| 1098 | ser_info_t *info = (ser_info_t *)tty->driver_data; |
| 1099 | |
| 1100 | if (serial_paranoia_check(info, tty->name, "rs_chars_in_buffer")) |
| 1101 | return 0; |
| 1102 | return 0; |
| 1103 | } |
| 1104 | |
| 1105 | static void rs_360_flush_buffer(struct tty_struct *tty) |
| 1106 | { |
| 1107 | ser_info_t *info = (ser_info_t *)tty->driver_data; |
| 1108 | |
| 1109 | if (serial_paranoia_check(info, tty->name, "rs_flush_buffer")) |
| 1110 | return; |
| 1111 | |
| 1112 | /* There is nothing to "flush", whatever we gave the CPM |
| 1113 | * is on its way out. |
| 1114 | */ |
| 1115 | tty_wakeup(tty); |
| 1116 | info->flags &= ~TX_WAKEUP; |
| 1117 | } |
| 1118 | |
| 1119 | /* |
| 1120 | * This function is used to send a high-priority XON/XOFF character to |
| 1121 | * the device |
| 1122 | */ |
| 1123 | static void rs_360_send_xchar(struct tty_struct *tty, char ch) |
| 1124 | { |
| 1125 | volatile QUICC_BD *bdp; |
| 1126 | |
| 1127 | ser_info_t *info = (ser_info_t *)tty->driver_data; |
| 1128 | |
| 1129 | if (serial_paranoia_check(info, tty->name, "rs_send_char")) |
| 1130 | return; |
| 1131 | |
| 1132 | bdp = info->tx_cur; |
| 1133 | while (bdp->status & BD_SC_READY); |
| 1134 | |
| 1135 | /* *((char *)__va(bdp->buf)) = ch; */ |
| 1136 | *((char *)bdp->buf) = ch; |
| 1137 | bdp->length = 1; |
| 1138 | bdp->status |= BD_SC_READY; |
| 1139 | |
| 1140 | /* Get next BD. |
| 1141 | */ |
| 1142 | if (bdp->status & BD_SC_WRAP) |
| 1143 | bdp = info->tx_bd_base; |
| 1144 | else |
| 1145 | bdp++; |
| 1146 | |
| 1147 | info->tx_cur = (QUICC_BD *)bdp; |
| 1148 | } |
| 1149 | |
| 1150 | /* |
| 1151 | * ------------------------------------------------------------ |
| 1152 | * rs_throttle() |
| 1153 | * |
| 1154 | * This routine is called by the upper-layer tty layer to signal that |
| 1155 | * incoming characters should be throttled. |
| 1156 | * ------------------------------------------------------------ |
| 1157 | */ |
| 1158 | static void rs_360_throttle(struct tty_struct * tty) |
| 1159 | { |
| 1160 | ser_info_t *info = (ser_info_t *)tty->driver_data; |
| 1161 | #ifdef SERIAL_DEBUG_THROTTLE |
| 1162 | char buf[64]; |
| 1163 | |
| 1164 | printk("throttle %s: %d....\n", _tty_name(tty, buf), |
| 1165 | tty->ldisc.chars_in_buffer(tty)); |
| 1166 | #endif |
| 1167 | |
| 1168 | if (serial_paranoia_check(info, tty->name, "rs_throttle")) |
| 1169 | return; |
| 1170 | |
| 1171 | if (I_IXOFF(tty)) |
| 1172 | rs_360_send_xchar(tty, STOP_CHAR(tty)); |
| 1173 | |
| 1174 | #ifdef modem_control |
| 1175 | if (tty->termios->c_cflag & CRTSCTS) |
| 1176 | info->MCR &= ~UART_MCR_RTS; |
| 1177 | |
| 1178 | local_irq_disable(); |
| 1179 | serial_out(info, UART_MCR, info->MCR); |
| 1180 | local_irq_enable(); |
| 1181 | #endif |
| 1182 | } |
| 1183 | |
| 1184 | static void rs_360_unthrottle(struct tty_struct * tty) |
| 1185 | { |
| 1186 | ser_info_t *info = (ser_info_t *)tty->driver_data; |
| 1187 | #ifdef SERIAL_DEBUG_THROTTLE |
| 1188 | char buf[64]; |
| 1189 | |
| 1190 | printk("unthrottle %s: %d....\n", _tty_name(tty, buf), |
| 1191 | tty->ldisc.chars_in_buffer(tty)); |
| 1192 | #endif |
| 1193 | |
| 1194 | if (serial_paranoia_check(info, tty->name, "rs_unthrottle")) |
| 1195 | return; |
| 1196 | |
| 1197 | if (I_IXOFF(tty)) { |
| 1198 | if (info->x_char) |
| 1199 | info->x_char = 0; |
| 1200 | else |
| 1201 | rs_360_send_xchar(tty, START_CHAR(tty)); |
| 1202 | } |
| 1203 | #ifdef modem_control |
| 1204 | if (tty->termios->c_cflag & CRTSCTS) |
| 1205 | info->MCR |= UART_MCR_RTS; |
| 1206 | local_irq_disable(); |
| 1207 | serial_out(info, UART_MCR, info->MCR); |
| 1208 | local_irq_enable(); |
| 1209 | #endif |
| 1210 | } |
| 1211 | |
| 1212 | /* |
| 1213 | * ------------------------------------------------------------ |
| 1214 | * rs_ioctl() and friends |
| 1215 | * ------------------------------------------------------------ |
| 1216 | */ |
| 1217 | |
| 1218 | #ifdef maybe |
| 1219 | /* |
| 1220 | * get_lsr_info - get line status register info |
| 1221 | * |
| 1222 | * Purpose: Let user call ioctl() to get info when the UART physically |
| 1223 | * is emptied. On bus types like RS485, the transmitter must |
| 1224 | * release the bus after transmitting. This must be done when |
| 1225 | * the transmit shift register is empty, not be done when the |
| 1226 | * transmit holding register is empty. This functionality |
| 1227 | * allows an RS485 driver to be written in user space. |
| 1228 | */ |
| 1229 | static int get_lsr_info(struct async_struct * info, unsigned int *value) |
| 1230 | { |
| 1231 | unsigned char status; |
| 1232 | unsigned int result; |
| 1233 | |
| 1234 | local_irq_disable(); |
| 1235 | status = serial_in(info, UART_LSR); |
| 1236 | local_irq_enable(); |
| 1237 | result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0); |
| 1238 | return put_user(result,value); |
| 1239 | } |
| 1240 | #endif |
| 1241 | |
| 1242 | static int rs_360_tiocmget(struct tty_struct *tty, struct file *file) |
| 1243 | { |
| 1244 | ser_info_t *info = (ser_info_t *)tty->driver_data; |
| 1245 | unsigned int result = 0; |
| 1246 | #ifdef modem_control |
| 1247 | unsigned char control, status; |
| 1248 | |
| 1249 | if (serial_paranoia_check(info, tty->name, __FUNCTION__)) |
| 1250 | return -ENODEV; |
| 1251 | |
| 1252 | if (tty->flags & (1 << TTY_IO_ERROR)) |
| 1253 | return -EIO; |
| 1254 | |
| 1255 | control = info->MCR; |
| 1256 | local_irq_disable(); |
| 1257 | status = serial_in(info, UART_MSR); |
| 1258 | local_irq_enable(); |
| 1259 | result = ((control & UART_MCR_RTS) ? TIOCM_RTS : 0) |
| 1260 | | ((control & UART_MCR_DTR) ? TIOCM_DTR : 0) |
| 1261 | #ifdef TIOCM_OUT1 |
| 1262 | | ((control & UART_MCR_OUT1) ? TIOCM_OUT1 : 0) |
| 1263 | | ((control & UART_MCR_OUT2) ? TIOCM_OUT2 : 0) |
| 1264 | #endif |
| 1265 | | ((status & UART_MSR_DCD) ? TIOCM_CAR : 0) |
| 1266 | | ((status & UART_MSR_RI) ? TIOCM_RNG : 0) |
| 1267 | | ((status & UART_MSR_DSR) ? TIOCM_DSR : 0) |
| 1268 | | ((status & UART_MSR_CTS) ? TIOCM_CTS : 0); |
| 1269 | #endif |
| 1270 | return result; |
| 1271 | } |
| 1272 | |
| 1273 | static int rs_360_tiocmset(struct tty_struct *tty, struct file *file, |
| 1274 | unsigned int set, unsigned int clear) |
| 1275 | { |
| 1276 | #ifdef modem_control |
| 1277 | ser_info_t *info = (ser_info_t *)tty->driver_data; |
| 1278 | unsigned int arg; |
| 1279 | |
| 1280 | if (serial_paranoia_check(info, tty->name, __FUNCTION__)) |
| 1281 | return -ENODEV; |
| 1282 | |
| 1283 | if (tty->flags & (1 << TTY_IO_ERROR)) |
| 1284 | return -EIO; |
Alan Cox | c0754c9 | 2008-04-30 00:53:27 -0700 | [diff] [blame] | 1285 | /* FIXME: locking on info->mcr */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1286 | if (set & TIOCM_RTS) |
| 1287 | info->mcr |= UART_MCR_RTS; |
| 1288 | if (set & TIOCM_DTR) |
| 1289 | info->mcr |= UART_MCR_DTR; |
| 1290 | if (clear & TIOCM_RTS) |
| 1291 | info->MCR &= ~UART_MCR_RTS; |
| 1292 | if (clear & TIOCM_DTR) |
| 1293 | info->MCR &= ~UART_MCR_DTR; |
| 1294 | |
| 1295 | #ifdef TIOCM_OUT1 |
| 1296 | if (set & TIOCM_OUT1) |
| 1297 | info->MCR |= UART_MCR_OUT1; |
| 1298 | if (set & TIOCM_OUT2) |
| 1299 | info->MCR |= UART_MCR_OUT2; |
| 1300 | if (clear & TIOCM_OUT1) |
| 1301 | info->MCR &= ~UART_MCR_OUT1; |
| 1302 | if (clear & TIOCM_OUT2) |
| 1303 | info->MCR &= ~UART_MCR_OUT2; |
| 1304 | #endif |
| 1305 | |
| 1306 | local_irq_disable(); |
| 1307 | serial_out(info, UART_MCR, info->MCR); |
| 1308 | local_irq_enable(); |
| 1309 | #endif |
| 1310 | return 0; |
| 1311 | } |
| 1312 | |
| 1313 | /* Sending a break is a two step process on the SMC/SCC. It is accomplished |
| 1314 | * by sending a STOP TRANSMIT command followed by a RESTART TRANSMIT |
| 1315 | * command. We take advantage of the begin/end functions to make this |
| 1316 | * happen. |
| 1317 | */ |
| 1318 | static ushort smc_chan_map[] = { |
| 1319 | CPM_CR_CH_SMC1, |
| 1320 | CPM_CR_CH_SMC2 |
| 1321 | }; |
| 1322 | |
| 1323 | static ushort scc_chan_map[] = { |
| 1324 | CPM_CR_CH_SCC1, |
| 1325 | CPM_CR_CH_SCC2, |
| 1326 | CPM_CR_CH_SCC3, |
| 1327 | CPM_CR_CH_SCC4 |
| 1328 | }; |
| 1329 | |
| 1330 | static void begin_break(ser_info_t *info) |
| 1331 | { |
| 1332 | volatile QUICC *cp; |
| 1333 | ushort chan; |
| 1334 | int idx; |
| 1335 | |
| 1336 | cp = pquicc; |
| 1337 | |
| 1338 | idx = PORT_NUM(info->state->smc_scc_num); |
| 1339 | if (info->state->smc_scc_num & NUM_IS_SCC) |
| 1340 | chan = scc_chan_map[idx]; |
| 1341 | else |
| 1342 | chan = smc_chan_map[idx]; |
| 1343 | |
| 1344 | cp->cp_cr = mk_cr_cmd(chan, CPM_CR_STOP_TX) | CPM_CR_FLG; |
| 1345 | while (cp->cp_cr & CPM_CR_FLG); |
| 1346 | } |
| 1347 | |
| 1348 | static void end_break(ser_info_t *info) |
| 1349 | { |
| 1350 | volatile QUICC *cp; |
| 1351 | ushort chan; |
| 1352 | int idx; |
| 1353 | |
| 1354 | cp = pquicc; |
| 1355 | |
| 1356 | idx = PORT_NUM(info->state->smc_scc_num); |
| 1357 | if (info->state->smc_scc_num & NUM_IS_SCC) |
| 1358 | chan = scc_chan_map[idx]; |
| 1359 | else |
| 1360 | chan = smc_chan_map[idx]; |
| 1361 | |
| 1362 | cp->cp_cr = mk_cr_cmd(chan, CPM_CR_RESTART_TX) | CPM_CR_FLG; |
| 1363 | while (cp->cp_cr & CPM_CR_FLG); |
| 1364 | } |
| 1365 | |
| 1366 | /* |
| 1367 | * This routine sends a break character out the serial port. |
| 1368 | */ |
Nishanth Aravamudan | 5d582b4 | 2005-06-25 14:59:32 -0700 | [diff] [blame] | 1369 | static void send_break(ser_info_t *info, unsigned int duration) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1370 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1371 | #ifdef SERIAL_DEBUG_SEND_BREAK |
| 1372 | printk("rs_send_break(%d) jiff=%lu...", duration, jiffies); |
| 1373 | #endif |
| 1374 | begin_break(info); |
Nishanth Aravamudan | 5d582b4 | 2005-06-25 14:59:32 -0700 | [diff] [blame] | 1375 | msleep_interruptible(duration); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1376 | end_break(info); |
| 1377 | #ifdef SERIAL_DEBUG_SEND_BREAK |
| 1378 | printk("done jiffies=%lu\n", jiffies); |
| 1379 | #endif |
| 1380 | } |
| 1381 | |
| 1382 | |
| 1383 | static int rs_360_ioctl(struct tty_struct *tty, struct file * file, |
| 1384 | unsigned int cmd, unsigned long arg) |
| 1385 | { |
| 1386 | int error; |
| 1387 | ser_info_t *info = (ser_info_t *)tty->driver_data; |
| 1388 | int retval; |
| 1389 | struct async_icount cnow; |
| 1390 | /* struct async_icount_24 cnow;*/ /* kernel counter temps */ |
| 1391 | struct serial_icounter_struct *p_cuser; /* user space */ |
| 1392 | |
| 1393 | if (serial_paranoia_check(info, tty->name, "rs_ioctl")) |
| 1394 | return -ENODEV; |
| 1395 | |
| 1396 | if ((cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT)) { |
| 1397 | if (tty->flags & (1 << TTY_IO_ERROR)) |
| 1398 | return -EIO; |
| 1399 | } |
| 1400 | |
| 1401 | switch (cmd) { |
| 1402 | case TCSBRK: /* SVID version: non-zero arg --> no break */ |
| 1403 | retval = tty_check_change(tty); |
| 1404 | if (retval) |
| 1405 | return retval; |
| 1406 | tty_wait_until_sent(tty, 0); |
| 1407 | if (signal_pending(current)) |
| 1408 | return -EINTR; |
| 1409 | if (!arg) { |
Nishanth Aravamudan | 5d582b4 | 2005-06-25 14:59:32 -0700 | [diff] [blame] | 1410 | send_break(info, 250); /* 1/4 second */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1411 | if (signal_pending(current)) |
| 1412 | return -EINTR; |
| 1413 | } |
| 1414 | return 0; |
| 1415 | case TCSBRKP: /* support for POSIX tcsendbreak() */ |
| 1416 | retval = tty_check_change(tty); |
| 1417 | if (retval) |
| 1418 | return retval; |
| 1419 | tty_wait_until_sent(tty, 0); |
| 1420 | if (signal_pending(current)) |
| 1421 | return -EINTR; |
Nishanth Aravamudan | 5d582b4 | 2005-06-25 14:59:32 -0700 | [diff] [blame] | 1422 | send_break(info, arg ? arg*100 : 250); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1423 | if (signal_pending(current)) |
| 1424 | return -EINTR; |
| 1425 | return 0; |
| 1426 | case TIOCSBRK: |
| 1427 | retval = tty_check_change(tty); |
| 1428 | if (retval) |
| 1429 | return retval; |
| 1430 | tty_wait_until_sent(tty, 0); |
| 1431 | begin_break(info); |
| 1432 | return 0; |
| 1433 | case TIOCCBRK: |
| 1434 | retval = tty_check_change(tty); |
| 1435 | if (retval) |
| 1436 | return retval; |
| 1437 | end_break(info); |
| 1438 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1439 | #ifdef maybe |
| 1440 | case TIOCSERGETLSR: /* Get line status register */ |
| 1441 | return get_lsr_info(info, (unsigned int *) arg); |
| 1442 | #endif |
| 1443 | /* |
| 1444 | * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change |
| 1445 | * - mask passed in arg for lines of interest |
| 1446 | * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking) |
| 1447 | * Caller should use TIOCGICOUNT to see which one it was |
| 1448 | */ |
| 1449 | case TIOCMIWAIT: |
| 1450 | #ifdef modem_control |
| 1451 | local_irq_disable(); |
| 1452 | /* note the counters on entry */ |
| 1453 | cprev = info->state->icount; |
| 1454 | local_irq_enable(); |
| 1455 | while (1) { |
| 1456 | interruptible_sleep_on(&info->delta_msr_wait); |
| 1457 | /* see if a signal did it */ |
| 1458 | if (signal_pending(current)) |
| 1459 | return -ERESTARTSYS; |
| 1460 | local_irq_disable(); |
| 1461 | cnow = info->state->icount; /* atomic copy */ |
| 1462 | local_irq_enable(); |
| 1463 | if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && |
| 1464 | cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) |
| 1465 | return -EIO; /* no change => error */ |
| 1466 | if ( ((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || |
| 1467 | ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || |
| 1468 | ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) || |
| 1469 | ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)) ) { |
| 1470 | return 0; |
| 1471 | } |
| 1472 | cprev = cnow; |
| 1473 | } |
| 1474 | /* NOTREACHED */ |
| 1475 | #else |
| 1476 | return 0; |
| 1477 | #endif |
| 1478 | |
| 1479 | /* |
| 1480 | * Get counter of input serial line interrupts (DCD,RI,DSR,CTS) |
| 1481 | * Return: write counters to the user passed counter struct |
| 1482 | * NB: both 1->0 and 0->1 transitions are counted except for |
| 1483 | * RI where only 0->1 is counted. |
| 1484 | */ |
| 1485 | case TIOCGICOUNT: |
| 1486 | local_irq_disable(); |
| 1487 | cnow = info->state->icount; |
| 1488 | local_irq_enable(); |
| 1489 | p_cuser = (struct serial_icounter_struct *) arg; |
| 1490 | /* error = put_user(cnow.cts, &p_cuser->cts); */ |
| 1491 | /* if (error) return error; */ |
| 1492 | /* error = put_user(cnow.dsr, &p_cuser->dsr); */ |
| 1493 | /* if (error) return error; */ |
| 1494 | /* error = put_user(cnow.rng, &p_cuser->rng); */ |
| 1495 | /* if (error) return error; */ |
| 1496 | /* error = put_user(cnow.dcd, &p_cuser->dcd); */ |
| 1497 | /* if (error) return error; */ |
| 1498 | |
| 1499 | put_user(cnow.cts, &p_cuser->cts); |
| 1500 | put_user(cnow.dsr, &p_cuser->dsr); |
| 1501 | put_user(cnow.rng, &p_cuser->rng); |
| 1502 | put_user(cnow.dcd, &p_cuser->dcd); |
| 1503 | return 0; |
| 1504 | |
| 1505 | default: |
| 1506 | return -ENOIOCTLCMD; |
| 1507 | } |
| 1508 | return 0; |
| 1509 | } |
| 1510 | |
| 1511 | /* FIX UP modem control here someday...... |
| 1512 | */ |
Alan Cox | 606d099 | 2006-12-08 02:38:45 -0800 | [diff] [blame] | 1513 | static void rs_360_set_termios(struct tty_struct *tty, struct ktermios *old_termios) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1514 | { |
| 1515 | ser_info_t *info = (ser_info_t *)tty->driver_data; |
| 1516 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1517 | change_speed(info); |
| 1518 | |
| 1519 | #ifdef modem_control |
| 1520 | /* Handle transition to B0 status */ |
| 1521 | if ((old_termios->c_cflag & CBAUD) && |
| 1522 | !(tty->termios->c_cflag & CBAUD)) { |
| 1523 | info->MCR &= ~(UART_MCR_DTR|UART_MCR_RTS); |
| 1524 | local_irq_disable(); |
| 1525 | serial_out(info, UART_MCR, info->MCR); |
| 1526 | local_irq_enable(); |
| 1527 | } |
| 1528 | |
| 1529 | /* Handle transition away from B0 status */ |
| 1530 | if (!(old_termios->c_cflag & CBAUD) && |
| 1531 | (tty->termios->c_cflag & CBAUD)) { |
| 1532 | info->MCR |= UART_MCR_DTR; |
| 1533 | if (!tty->hw_stopped || |
| 1534 | !(tty->termios->c_cflag & CRTSCTS)) { |
| 1535 | info->MCR |= UART_MCR_RTS; |
| 1536 | } |
| 1537 | local_irq_disable(); |
| 1538 | serial_out(info, UART_MCR, info->MCR); |
| 1539 | local_irq_enable(); |
| 1540 | } |
| 1541 | |
| 1542 | /* Handle turning off CRTSCTS */ |
| 1543 | if ((old_termios->c_cflag & CRTSCTS) && |
| 1544 | !(tty->termios->c_cflag & CRTSCTS)) { |
| 1545 | tty->hw_stopped = 0; |
| 1546 | rs_360_start(tty); |
| 1547 | } |
| 1548 | #endif |
| 1549 | |
| 1550 | #if 0 |
| 1551 | /* |
| 1552 | * No need to wake up processes in open wait, since they |
| 1553 | * sample the CLOCAL flag once, and don't recheck it. |
| 1554 | * XXX It's not clear whether the current behavior is correct |
| 1555 | * or not. Hence, this may change..... |
| 1556 | */ |
| 1557 | if (!(old_termios->c_cflag & CLOCAL) && |
| 1558 | (tty->termios->c_cflag & CLOCAL)) |
| 1559 | wake_up_interruptible(&info->open_wait); |
| 1560 | #endif |
| 1561 | } |
| 1562 | |
| 1563 | /* |
| 1564 | * ------------------------------------------------------------ |
| 1565 | * rs_close() |
| 1566 | * |
| 1567 | * This routine is called when the serial port gets closed. First, we |
| 1568 | * wait for the last remaining data to be sent. Then, we unlink its |
| 1569 | * async structure from the interrupt chain if necessary, and we free |
| 1570 | * that IRQ if nothing is left in the chain. |
| 1571 | * ------------------------------------------------------------ |
| 1572 | */ |
| 1573 | static void rs_360_close(struct tty_struct *tty, struct file * filp) |
| 1574 | { |
| 1575 | ser_info_t *info = (ser_info_t *)tty->driver_data; |
| 1576 | /* struct async_state *state; */ |
| 1577 | struct serial_state *state; |
| 1578 | unsigned long flags; |
| 1579 | int idx; |
| 1580 | volatile struct smc_regs *smcp; |
| 1581 | volatile struct scc_regs *sccp; |
| 1582 | |
| 1583 | if (!info || serial_paranoia_check(info, tty->name, "rs_close")) |
| 1584 | return; |
| 1585 | |
| 1586 | state = info->state; |
| 1587 | |
| 1588 | local_irq_save(flags); |
| 1589 | |
| 1590 | if (tty_hung_up_p(filp)) { |
| 1591 | DBG_CNT("before DEC-hung"); |
| 1592 | local_irq_restore(flags); |
| 1593 | return; |
| 1594 | } |
| 1595 | |
| 1596 | #ifdef SERIAL_DEBUG_OPEN |
| 1597 | printk("rs_close ttys%d, count = %d\n", info->line, state->count); |
| 1598 | #endif |
| 1599 | if ((tty->count == 1) && (state->count != 1)) { |
| 1600 | /* |
| 1601 | * Uh, oh. tty->count is 1, which means that the tty |
| 1602 | * structure will be freed. state->count should always |
| 1603 | * be one in these conditions. If it's greater than |
| 1604 | * one, we've got real problems, since it means the |
| 1605 | * serial port won't be shutdown. |
| 1606 | */ |
| 1607 | printk("rs_close: bad serial port count; tty->count is 1, " |
| 1608 | "state->count is %d\n", state->count); |
| 1609 | state->count = 1; |
| 1610 | } |
| 1611 | if (--state->count < 0) { |
| 1612 | printk("rs_close: bad serial port count for ttys%d: %d\n", |
| 1613 | info->line, state->count); |
| 1614 | state->count = 0; |
| 1615 | } |
| 1616 | if (state->count) { |
| 1617 | DBG_CNT("before DEC-2"); |
| 1618 | local_irq_restore(flags); |
| 1619 | return; |
| 1620 | } |
| 1621 | info->flags |= ASYNC_CLOSING; |
| 1622 | /* |
| 1623 | * Now we wait for the transmit buffer to clear; and we notify |
| 1624 | * the line discipline to only process XON/XOFF characters. |
| 1625 | */ |
| 1626 | tty->closing = 1; |
| 1627 | if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE) |
| 1628 | tty_wait_until_sent(tty, info->closing_wait); |
| 1629 | /* |
| 1630 | * At this point we stop accepting input. To do this, we |
| 1631 | * disable the receive line status interrupts, and tell the |
| 1632 | * interrupt driver to stop checking the data ready bit in the |
| 1633 | * line status register. |
| 1634 | */ |
| 1635 | info->read_status_mask &= ~BD_SC_EMPTY; |
| 1636 | if (info->flags & ASYNC_INITIALIZED) { |
| 1637 | |
| 1638 | idx = PORT_NUM(info->state->smc_scc_num); |
| 1639 | if (info->state->smc_scc_num & NUM_IS_SCC) { |
| 1640 | sccp = &pquicc->scc_regs[idx]; |
| 1641 | sccp->scc_sccm &= ~UART_SCCM_RX; |
| 1642 | sccp->scc_gsmr.w.low &= ~SCC_GSMRL_ENR; |
| 1643 | } else { |
| 1644 | smcp = &pquicc->smc_regs[idx]; |
| 1645 | smcp->smc_smcm &= ~SMCM_RX; |
| 1646 | smcp->smc_smcmr &= ~SMCMR_REN; |
| 1647 | } |
| 1648 | /* |
| 1649 | * Before we drop DTR, make sure the UART transmitter |
| 1650 | * has completely drained; this is especially |
| 1651 | * important if there is a transmit FIFO! |
| 1652 | */ |
| 1653 | rs_360_wait_until_sent(tty, info->timeout); |
| 1654 | } |
| 1655 | shutdown(info); |
Alan Cox | 978e595 | 2008-04-30 00:53:59 -0700 | [diff] [blame^] | 1656 | rs_360_flush_buffer(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1657 | tty_ldisc_flush(tty); |
| 1658 | tty->closing = 0; |
| 1659 | info->event = 0; |
| 1660 | info->tty = 0; |
| 1661 | if (info->blocked_open) { |
| 1662 | if (info->close_delay) { |
| 1663 | msleep_interruptible(jiffies_to_msecs(info->close_delay)); |
| 1664 | } |
| 1665 | wake_up_interruptible(&info->open_wait); |
| 1666 | } |
| 1667 | info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING); |
| 1668 | wake_up_interruptible(&info->close_wait); |
| 1669 | local_irq_restore(flags); |
| 1670 | } |
| 1671 | |
| 1672 | /* |
| 1673 | * rs_wait_until_sent() --- wait until the transmitter is empty |
| 1674 | */ |
| 1675 | static void rs_360_wait_until_sent(struct tty_struct *tty, int timeout) |
| 1676 | { |
| 1677 | ser_info_t *info = (ser_info_t *)tty->driver_data; |
| 1678 | unsigned long orig_jiffies, char_time; |
| 1679 | /*int lsr;*/ |
| 1680 | volatile QUICC_BD *bdp; |
| 1681 | |
| 1682 | if (serial_paranoia_check(info, tty->name, "rs_wait_until_sent")) |
| 1683 | return; |
| 1684 | |
| 1685 | #ifdef maybe |
| 1686 | if (info->state->type == PORT_UNKNOWN) |
| 1687 | return; |
| 1688 | #endif |
| 1689 | |
| 1690 | orig_jiffies = jiffies; |
| 1691 | /* |
| 1692 | * Set the check interval to be 1/5 of the estimated time to |
| 1693 | * send a single character, and make it at least 1. The check |
| 1694 | * interval should also be less than the timeout. |
| 1695 | * |
| 1696 | * Note: we have to use pretty tight timings here to satisfy |
| 1697 | * the NIST-PCTS. |
| 1698 | */ |
| 1699 | char_time = 1; |
| 1700 | if (timeout) |
| 1701 | char_time = min(char_time, (unsigned long)timeout); |
| 1702 | #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT |
| 1703 | printk("In rs_wait_until_sent(%d) check=%lu...", timeout, char_time); |
| 1704 | printk("jiff=%lu...", jiffies); |
| 1705 | #endif |
| 1706 | |
Alan Cox | 978e595 | 2008-04-30 00:53:59 -0700 | [diff] [blame^] | 1707 | lock_kernel(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1708 | /* We go through the loop at least once because we can't tell |
| 1709 | * exactly when the last character exits the shifter. There can |
| 1710 | * be at least two characters waiting to be sent after the buffers |
| 1711 | * are empty. |
| 1712 | */ |
| 1713 | do { |
| 1714 | #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT |
| 1715 | printk("lsr = %d (jiff=%lu)...", lsr, jiffies); |
| 1716 | #endif |
| 1717 | /* current->counter = 0; make us low-priority */ |
| 1718 | msleep_interruptible(jiffies_to_msecs(char_time)); |
| 1719 | if (signal_pending(current)) |
| 1720 | break; |
Julia Lawall | d1ec61e | 2008-04-28 02:14:10 -0700 | [diff] [blame] | 1721 | if (timeout && (time_after(jiffies, orig_jiffies + timeout))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1722 | break; |
| 1723 | /* The 'tx_cur' is really the next buffer to send. We |
| 1724 | * have to back up to the previous BD and wait for it |
| 1725 | * to go. This isn't perfect, because all this indicates |
| 1726 | * is the buffer is available. There are still characters |
| 1727 | * in the CPM FIFO. |
| 1728 | */ |
| 1729 | bdp = info->tx_cur; |
| 1730 | if (bdp == info->tx_bd_base) |
| 1731 | bdp += (TX_NUM_FIFO-1); |
| 1732 | else |
| 1733 | bdp--; |
| 1734 | } while (bdp->status & BD_SC_READY); |
| 1735 | current->state = TASK_RUNNING; |
Alan Cox | 978e595 | 2008-04-30 00:53:59 -0700 | [diff] [blame^] | 1736 | unlock_kernel(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1737 | #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT |
| 1738 | printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies); |
| 1739 | #endif |
| 1740 | } |
| 1741 | |
| 1742 | /* |
| 1743 | * rs_hangup() --- called by tty_hangup() when a hangup is signaled. |
| 1744 | */ |
| 1745 | static void rs_360_hangup(struct tty_struct *tty) |
| 1746 | { |
| 1747 | ser_info_t *info = (ser_info_t *)tty->driver_data; |
| 1748 | struct serial_state *state = info->state; |
| 1749 | |
| 1750 | if (serial_paranoia_check(info, tty->name, "rs_hangup")) |
| 1751 | return; |
| 1752 | |
| 1753 | state = info->state; |
| 1754 | |
| 1755 | rs_360_flush_buffer(tty); |
| 1756 | shutdown(info); |
| 1757 | info->event = 0; |
| 1758 | state->count = 0; |
| 1759 | info->flags &= ~ASYNC_NORMAL_ACTIVE; |
| 1760 | info->tty = 0; |
| 1761 | wake_up_interruptible(&info->open_wait); |
| 1762 | } |
| 1763 | |
| 1764 | /* |
| 1765 | * ------------------------------------------------------------ |
| 1766 | * rs_open() and friends |
| 1767 | * ------------------------------------------------------------ |
| 1768 | */ |
| 1769 | static int block_til_ready(struct tty_struct *tty, struct file * filp, |
| 1770 | ser_info_t *info) |
| 1771 | { |
| 1772 | #ifdef DO_THIS_LATER |
| 1773 | DECLARE_WAITQUEUE(wait, current); |
| 1774 | #endif |
| 1775 | struct serial_state *state = info->state; |
| 1776 | int retval; |
| 1777 | int do_clocal = 0; |
| 1778 | |
| 1779 | /* |
| 1780 | * If the device is in the middle of being closed, then block |
| 1781 | * until it's done, and then try again. |
| 1782 | */ |
| 1783 | if (tty_hung_up_p(filp) || |
| 1784 | (info->flags & ASYNC_CLOSING)) { |
| 1785 | if (info->flags & ASYNC_CLOSING) |
| 1786 | interruptible_sleep_on(&info->close_wait); |
| 1787 | #ifdef SERIAL_DO_RESTART |
| 1788 | if (info->flags & ASYNC_HUP_NOTIFY) |
| 1789 | return -EAGAIN; |
| 1790 | else |
| 1791 | return -ERESTARTSYS; |
| 1792 | #else |
| 1793 | return -EAGAIN; |
| 1794 | #endif |
| 1795 | } |
| 1796 | |
| 1797 | /* |
| 1798 | * If non-blocking mode is set, or the port is not enabled, |
| 1799 | * then make the check up front and then exit. |
| 1800 | * If this is an SMC port, we don't have modem control to wait |
| 1801 | * for, so just get out here. |
| 1802 | */ |
| 1803 | if ((filp->f_flags & O_NONBLOCK) || |
| 1804 | (tty->flags & (1 << TTY_IO_ERROR)) || |
| 1805 | !(info->state->smc_scc_num & NUM_IS_SCC)) { |
| 1806 | info->flags |= ASYNC_NORMAL_ACTIVE; |
| 1807 | return 0; |
| 1808 | } |
| 1809 | |
| 1810 | if (tty->termios->c_cflag & CLOCAL) |
| 1811 | do_clocal = 1; |
| 1812 | |
| 1813 | /* |
| 1814 | * Block waiting for the carrier detect and the line to become |
| 1815 | * free (i.e., not in use by the callout). While we are in |
| 1816 | * this loop, state->count is dropped by one, so that |
| 1817 | * rs_close() knows when to free things. We restore it upon |
| 1818 | * exit, either normal or abnormal. |
| 1819 | */ |
| 1820 | retval = 0; |
| 1821 | #ifdef DO_THIS_LATER |
| 1822 | add_wait_queue(&info->open_wait, &wait); |
| 1823 | #ifdef SERIAL_DEBUG_OPEN |
| 1824 | printk("block_til_ready before block: ttys%d, count = %d\n", |
| 1825 | state->line, state->count); |
| 1826 | #endif |
| 1827 | local_irq_disable(); |
| 1828 | if (!tty_hung_up_p(filp)) |
| 1829 | state->count--; |
| 1830 | local_irq_enable(); |
| 1831 | info->blocked_open++; |
| 1832 | while (1) { |
| 1833 | local_irq_disable(); |
| 1834 | if (tty->termios->c_cflag & CBAUD) |
| 1835 | serial_out(info, UART_MCR, |
| 1836 | serial_inp(info, UART_MCR) | |
| 1837 | (UART_MCR_DTR | UART_MCR_RTS)); |
| 1838 | local_irq_enable(); |
| 1839 | set_current_state(TASK_INTERRUPTIBLE); |
| 1840 | if (tty_hung_up_p(filp) || |
| 1841 | !(info->flags & ASYNC_INITIALIZED)) { |
| 1842 | #ifdef SERIAL_DO_RESTART |
| 1843 | if (info->flags & ASYNC_HUP_NOTIFY) |
| 1844 | retval = -EAGAIN; |
| 1845 | else |
| 1846 | retval = -ERESTARTSYS; |
| 1847 | #else |
| 1848 | retval = -EAGAIN; |
| 1849 | #endif |
| 1850 | break; |
| 1851 | } |
| 1852 | if (!(info->flags & ASYNC_CLOSING) && |
| 1853 | (do_clocal || (serial_in(info, UART_MSR) & |
| 1854 | UART_MSR_DCD))) |
| 1855 | break; |
| 1856 | if (signal_pending(current)) { |
| 1857 | retval = -ERESTARTSYS; |
| 1858 | break; |
| 1859 | } |
| 1860 | #ifdef SERIAL_DEBUG_OPEN |
| 1861 | printk("block_til_ready blocking: ttys%d, count = %d\n", |
| 1862 | info->line, state->count); |
| 1863 | #endif |
| 1864 | schedule(); |
| 1865 | } |
| 1866 | current->state = TASK_RUNNING; |
| 1867 | remove_wait_queue(&info->open_wait, &wait); |
| 1868 | if (!tty_hung_up_p(filp)) |
| 1869 | state->count++; |
| 1870 | info->blocked_open--; |
| 1871 | #ifdef SERIAL_DEBUG_OPEN |
| 1872 | printk("block_til_ready after blocking: ttys%d, count = %d\n", |
| 1873 | info->line, state->count); |
| 1874 | #endif |
| 1875 | #endif /* DO_THIS_LATER */ |
| 1876 | if (retval) |
| 1877 | return retval; |
| 1878 | info->flags |= ASYNC_NORMAL_ACTIVE; |
| 1879 | return 0; |
| 1880 | } |
| 1881 | |
| 1882 | static int get_async_struct(int line, ser_info_t **ret_info) |
| 1883 | { |
| 1884 | struct serial_state *sstate; |
| 1885 | |
| 1886 | sstate = rs_table + line; |
| 1887 | if (sstate->info) { |
| 1888 | sstate->count++; |
| 1889 | *ret_info = (ser_info_t *)sstate->info; |
| 1890 | return 0; |
| 1891 | } |
| 1892 | else { |
| 1893 | return -ENOMEM; |
| 1894 | } |
| 1895 | } |
| 1896 | |
| 1897 | /* |
| 1898 | * This routine is called whenever a serial port is opened. It |
| 1899 | * enables interrupts for a serial port, linking in its async structure into |
| 1900 | * the IRQ chain. It also performs the serial-specific |
| 1901 | * initialization for the tty structure. |
| 1902 | */ |
| 1903 | static int rs_360_open(struct tty_struct *tty, struct file * filp) |
| 1904 | { |
| 1905 | ser_info_t *info; |
| 1906 | int retval, line; |
| 1907 | |
| 1908 | line = tty->index; |
| 1909 | if ((line < 0) || (line >= NR_PORTS)) |
| 1910 | return -ENODEV; |
| 1911 | retval = get_async_struct(line, &info); |
| 1912 | if (retval) |
| 1913 | return retval; |
| 1914 | if (serial_paranoia_check(info, tty->name, "rs_open")) |
| 1915 | return -ENODEV; |
| 1916 | |
| 1917 | #ifdef SERIAL_DEBUG_OPEN |
| 1918 | printk("rs_open %s, count = %d\n", tty->name, info->state->count); |
| 1919 | #endif |
| 1920 | tty->driver_data = info; |
| 1921 | info->tty = tty; |
| 1922 | |
| 1923 | /* |
| 1924 | * Start up serial port |
| 1925 | */ |
| 1926 | retval = startup(info); |
| 1927 | if (retval) |
| 1928 | return retval; |
| 1929 | |
| 1930 | retval = block_til_ready(tty, filp, info); |
| 1931 | if (retval) { |
| 1932 | #ifdef SERIAL_DEBUG_OPEN |
| 1933 | printk("rs_open returning after block_til_ready with %d\n", |
| 1934 | retval); |
| 1935 | #endif |
| 1936 | return retval; |
| 1937 | } |
| 1938 | |
| 1939 | #ifdef SERIAL_DEBUG_OPEN |
| 1940 | printk("rs_open %s successful...", tty->name); |
| 1941 | #endif |
| 1942 | return 0; |
| 1943 | } |
| 1944 | |
| 1945 | /* |
| 1946 | * /proc fs routines.... |
| 1947 | */ |
| 1948 | |
| 1949 | static inline int line_info(char *buf, struct serial_state *state) |
| 1950 | { |
| 1951 | #ifdef notdef |
| 1952 | struct async_struct *info = state->info, scr_info; |
| 1953 | char stat_buf[30], control, status; |
| 1954 | #endif |
| 1955 | int ret; |
| 1956 | |
| 1957 | ret = sprintf(buf, "%d: uart:%s port:%X irq:%d", |
| 1958 | state->line, |
| 1959 | (state->smc_scc_num & NUM_IS_SCC) ? "SCC" : "SMC", |
| 1960 | (unsigned int)(state->port), state->irq); |
| 1961 | |
| 1962 | if (!state->port || (state->type == PORT_UNKNOWN)) { |
| 1963 | ret += sprintf(buf+ret, "\n"); |
| 1964 | return ret; |
| 1965 | } |
| 1966 | |
| 1967 | #ifdef notdef |
| 1968 | /* |
| 1969 | * Figure out the current RS-232 lines |
| 1970 | */ |
| 1971 | if (!info) { |
| 1972 | info = &scr_info; /* This is just for serial_{in,out} */ |
| 1973 | |
| 1974 | info->magic = SERIAL_MAGIC; |
| 1975 | info->port = state->port; |
| 1976 | info->flags = state->flags; |
| 1977 | info->quot = 0; |
| 1978 | info->tty = 0; |
| 1979 | } |
| 1980 | local_irq_disable(); |
| 1981 | status = serial_in(info, UART_MSR); |
| 1982 | control = info ? info->MCR : serial_in(info, UART_MCR); |
| 1983 | local_irq_enable(); |
| 1984 | |
| 1985 | stat_buf[0] = 0; |
| 1986 | stat_buf[1] = 0; |
| 1987 | if (control & UART_MCR_RTS) |
| 1988 | strcat(stat_buf, "|RTS"); |
| 1989 | if (status & UART_MSR_CTS) |
| 1990 | strcat(stat_buf, "|CTS"); |
| 1991 | if (control & UART_MCR_DTR) |
| 1992 | strcat(stat_buf, "|DTR"); |
| 1993 | if (status & UART_MSR_DSR) |
| 1994 | strcat(stat_buf, "|DSR"); |
| 1995 | if (status & UART_MSR_DCD) |
| 1996 | strcat(stat_buf, "|CD"); |
| 1997 | if (status & UART_MSR_RI) |
| 1998 | strcat(stat_buf, "|RI"); |
| 1999 | |
| 2000 | if (info->quot) { |
| 2001 | ret += sprintf(buf+ret, " baud:%d", |
| 2002 | state->baud_base / info->quot); |
| 2003 | } |
| 2004 | |
| 2005 | ret += sprintf(buf+ret, " tx:%d rx:%d", |
| 2006 | state->icount.tx, state->icount.rx); |
| 2007 | |
| 2008 | if (state->icount.frame) |
| 2009 | ret += sprintf(buf+ret, " fe:%d", state->icount.frame); |
| 2010 | |
| 2011 | if (state->icount.parity) |
| 2012 | ret += sprintf(buf+ret, " pe:%d", state->icount.parity); |
| 2013 | |
| 2014 | if (state->icount.brk) |
| 2015 | ret += sprintf(buf+ret, " brk:%d", state->icount.brk); |
| 2016 | |
| 2017 | if (state->icount.overrun) |
| 2018 | ret += sprintf(buf+ret, " oe:%d", state->icount.overrun); |
| 2019 | |
| 2020 | /* |
| 2021 | * Last thing is the RS-232 status lines |
| 2022 | */ |
| 2023 | ret += sprintf(buf+ret, " %s\n", stat_buf+1); |
| 2024 | #endif |
| 2025 | return ret; |
| 2026 | } |
| 2027 | |
| 2028 | int rs_360_read_proc(char *page, char **start, off_t off, int count, |
| 2029 | int *eof, void *data) |
| 2030 | { |
| 2031 | int i, len = 0; |
| 2032 | off_t begin = 0; |
| 2033 | |
| 2034 | len += sprintf(page, "serinfo:1.0 driver:%s\n", serial_version); |
| 2035 | for (i = 0; i < NR_PORTS && len < 4000; i++) { |
| 2036 | len += line_info(page + len, &rs_table[i]); |
| 2037 | if (len+begin > off+count) |
| 2038 | goto done; |
| 2039 | if (len+begin < off) { |
| 2040 | begin += len; |
| 2041 | len = 0; |
| 2042 | } |
| 2043 | } |
| 2044 | *eof = 1; |
| 2045 | done: |
| 2046 | if (off >= len+begin) |
| 2047 | return 0; |
| 2048 | *start = page + (begin-off); |
| 2049 | return ((count < begin+len-off) ? count : begin+len-off); |
| 2050 | } |
| 2051 | |
| 2052 | /* |
| 2053 | * --------------------------------------------------------------------- |
| 2054 | * rs_init() and friends |
| 2055 | * |
| 2056 | * rs_init() is called at boot-time to initialize the serial driver. |
| 2057 | * --------------------------------------------------------------------- |
| 2058 | */ |
| 2059 | |
| 2060 | /* |
| 2061 | * This routine prints out the appropriate serial driver version |
| 2062 | * number, and identifies which options were configured into this |
| 2063 | * driver. |
| 2064 | */ |
| 2065 | static _INLINE_ void show_serial_version(void) |
| 2066 | { |
| 2067 | printk(KERN_INFO "%s version %s\n", serial_name, serial_version); |
| 2068 | } |
| 2069 | |
| 2070 | |
| 2071 | /* |
| 2072 | * The serial console driver used during boot. Note that these names |
| 2073 | * clash with those found in "serial.c", so we currently can't support |
| 2074 | * the 16xxx uarts and these at the same time. I will fix this to become |
| 2075 | * an indirect function call from tty_io.c (or something). |
| 2076 | */ |
| 2077 | |
| 2078 | #ifdef CONFIG_SERIAL_CONSOLE |
| 2079 | |
| 2080 | /* |
| 2081 | * Print a string to the serial port trying not to disturb any possible |
| 2082 | * real use of the port... |
| 2083 | */ |
| 2084 | static void my_console_write(int idx, const char *s, |
| 2085 | unsigned count) |
| 2086 | { |
| 2087 | struct serial_state *ser; |
| 2088 | ser_info_t *info; |
| 2089 | unsigned i; |
| 2090 | QUICC_BD *bdp, *bdbase; |
| 2091 | volatile struct smc_uart_pram *up; |
| 2092 | volatile u_char *cp; |
| 2093 | |
| 2094 | ser = rs_table + idx; |
| 2095 | |
| 2096 | |
| 2097 | /* If the port has been initialized for general use, we have |
| 2098 | * to use the buffer descriptors allocated there. Otherwise, |
| 2099 | * we simply use the single buffer allocated. |
| 2100 | */ |
| 2101 | if ((info = (ser_info_t *)ser->info) != NULL) { |
| 2102 | bdp = info->tx_cur; |
| 2103 | bdbase = info->tx_bd_base; |
| 2104 | } |
| 2105 | else { |
| 2106 | /* Pointer to UART in parameter ram. |
| 2107 | */ |
| 2108 | /* up = (smc_uart_t *)&cpmp->cp_dparam[ser->port]; */ |
| 2109 | up = &pquicc->pram[ser->port].scc.pothers.idma_smc.psmc.u; |
| 2110 | |
| 2111 | /* Get the address of the host memory buffer. |
| 2112 | */ |
| 2113 | bdp = bdbase = (QUICC_BD *)((uint)pquicc + (uint)up->tbase); |
| 2114 | } |
| 2115 | |
| 2116 | /* |
| 2117 | * We need to gracefully shut down the transmitter, disable |
| 2118 | * interrupts, then send our bytes out. |
| 2119 | */ |
| 2120 | |
| 2121 | /* |
| 2122 | * Now, do each character. This is not as bad as it looks |
| 2123 | * since this is a holding FIFO and not a transmitting FIFO. |
| 2124 | * We could add the complexity of filling the entire transmit |
| 2125 | * buffer, but we would just wait longer between accesses...... |
| 2126 | */ |
| 2127 | for (i = 0; i < count; i++, s++) { |
| 2128 | /* Wait for transmitter fifo to empty. |
| 2129 | * Ready indicates output is ready, and xmt is doing |
| 2130 | * that, not that it is ready for us to send. |
| 2131 | */ |
| 2132 | while (bdp->status & BD_SC_READY); |
| 2133 | |
| 2134 | /* Send the character out. |
| 2135 | */ |
| 2136 | cp = bdp->buf; |
| 2137 | *cp = *s; |
| 2138 | |
| 2139 | bdp->length = 1; |
| 2140 | bdp->status |= BD_SC_READY; |
| 2141 | |
| 2142 | if (bdp->status & BD_SC_WRAP) |
| 2143 | bdp = bdbase; |
| 2144 | else |
| 2145 | bdp++; |
| 2146 | |
| 2147 | /* if a LF, also do CR... */ |
| 2148 | if (*s == 10) { |
| 2149 | while (bdp->status & BD_SC_READY); |
| 2150 | /* cp = __va(bdp->buf); */ |
| 2151 | cp = bdp->buf; |
| 2152 | *cp = 13; |
| 2153 | bdp->length = 1; |
| 2154 | bdp->status |= BD_SC_READY; |
| 2155 | |
| 2156 | if (bdp->status & BD_SC_WRAP) { |
| 2157 | bdp = bdbase; |
| 2158 | } |
| 2159 | else { |
| 2160 | bdp++; |
| 2161 | } |
| 2162 | } |
| 2163 | } |
| 2164 | |
| 2165 | /* |
| 2166 | * Finally, Wait for transmitter & holding register to empty |
| 2167 | * and restore the IER |
| 2168 | */ |
| 2169 | while (bdp->status & BD_SC_READY); |
| 2170 | |
| 2171 | if (info) |
| 2172 | info->tx_cur = (QUICC_BD *)bdp; |
| 2173 | } |
| 2174 | |
| 2175 | static void serial_console_write(struct console *c, const char *s, |
| 2176 | unsigned count) |
| 2177 | { |
| 2178 | #ifdef CONFIG_KGDB |
| 2179 | /* Try to let stub handle output. Returns true if it did. */ |
| 2180 | if (kgdb_output_string(s, count)) |
| 2181 | return; |
| 2182 | #endif |
| 2183 | my_console_write(c->index, s, count); |
| 2184 | } |
| 2185 | |
| 2186 | |
| 2187 | |
| 2188 | /*void console_print_68360(const char *p) |
| 2189 | { |
| 2190 | const char *cp = p; |
| 2191 | int i; |
| 2192 | |
| 2193 | for (i=0;cp[i]!=0;i++); |
| 2194 | |
| 2195 | serial_console_write (p, i); |
| 2196 | |
| 2197 | //Comment this if you want to have a strict interrupt-driven output |
| 2198 | //rs_fair_output(); |
| 2199 | |
| 2200 | return; |
| 2201 | }*/ |
| 2202 | |
| 2203 | |
| 2204 | |
| 2205 | |
| 2206 | |
| 2207 | |
| 2208 | #ifdef CONFIG_XMON |
| 2209 | int |
| 2210 | xmon_360_write(const char *s, unsigned count) |
| 2211 | { |
| 2212 | my_console_write(0, s, count); |
| 2213 | return(count); |
| 2214 | } |
| 2215 | #endif |
| 2216 | |
| 2217 | #ifdef CONFIG_KGDB |
| 2218 | void |
| 2219 | putDebugChar(char ch) |
| 2220 | { |
| 2221 | my_console_write(0, &ch, 1); |
| 2222 | } |
| 2223 | #endif |
| 2224 | |
| 2225 | /* |
| 2226 | * Receive character from the serial port. This only works well |
| 2227 | * before the port is initialized for real use. |
| 2228 | */ |
| 2229 | static int my_console_wait_key(int idx, int xmon, char *obuf) |
| 2230 | { |
| 2231 | struct serial_state *ser; |
| 2232 | u_char c, *cp; |
| 2233 | ser_info_t *info; |
| 2234 | QUICC_BD *bdp; |
| 2235 | volatile struct smc_uart_pram *up; |
| 2236 | int i; |
| 2237 | |
| 2238 | ser = rs_table + idx; |
| 2239 | |
| 2240 | /* Get the address of the host memory buffer. |
| 2241 | * If the port has been initialized for general use, we must |
| 2242 | * use information from the port structure. |
| 2243 | */ |
| 2244 | if ((info = (ser_info_t *)ser->info)) |
| 2245 | bdp = info->rx_cur; |
| 2246 | else |
| 2247 | /* bdp = (QUICC_BD *)&cpmp->cp_dpmem[up->smc_rbase]; */ |
| 2248 | bdp = (QUICC_BD *)((uint)pquicc + (uint)up->tbase); |
| 2249 | |
| 2250 | /* Pointer to UART in parameter ram. |
| 2251 | */ |
| 2252 | /* up = (smc_uart_t *)&cpmp->cp_dparam[ser->port]; */ |
| 2253 | up = &pquicc->pram[info->state->port].scc.pothers.idma_smc.psmc.u; |
| 2254 | |
| 2255 | /* |
| 2256 | * We need to gracefully shut down the receiver, disable |
| 2257 | * interrupts, then read the input. |
| 2258 | * XMON just wants a poll. If no character, return -1, else |
| 2259 | * return the character. |
| 2260 | */ |
| 2261 | if (!xmon) { |
| 2262 | while (bdp->status & BD_SC_EMPTY); |
| 2263 | } |
| 2264 | else { |
| 2265 | if (bdp->status & BD_SC_EMPTY) |
| 2266 | return -1; |
| 2267 | } |
| 2268 | |
| 2269 | cp = (char *)bdp->buf; |
| 2270 | |
| 2271 | if (obuf) { |
| 2272 | i = c = bdp->length; |
| 2273 | while (i-- > 0) |
| 2274 | *obuf++ = *cp++; |
| 2275 | } |
| 2276 | else { |
| 2277 | c = *cp; |
| 2278 | } |
| 2279 | bdp->status |= BD_SC_EMPTY; |
| 2280 | |
| 2281 | if (info) { |
| 2282 | if (bdp->status & BD_SC_WRAP) { |
| 2283 | bdp = info->rx_bd_base; |
| 2284 | } |
| 2285 | else { |
| 2286 | bdp++; |
| 2287 | } |
| 2288 | info->rx_cur = (QUICC_BD *)bdp; |
| 2289 | } |
| 2290 | |
| 2291 | return((int)c); |
| 2292 | } |
| 2293 | |
| 2294 | static int serial_console_wait_key(struct console *co) |
| 2295 | { |
| 2296 | return(my_console_wait_key(co->index, 0, NULL)); |
| 2297 | } |
| 2298 | |
| 2299 | #ifdef CONFIG_XMON |
| 2300 | int |
| 2301 | xmon_360_read_poll(void) |
| 2302 | { |
| 2303 | return(my_console_wait_key(0, 1, NULL)); |
| 2304 | } |
| 2305 | |
| 2306 | int |
| 2307 | xmon_360_read_char(void) |
| 2308 | { |
| 2309 | return(my_console_wait_key(0, 0, NULL)); |
| 2310 | } |
| 2311 | #endif |
| 2312 | |
| 2313 | #ifdef CONFIG_KGDB |
| 2314 | static char kgdb_buf[RX_BUF_SIZE], *kgdp; |
| 2315 | static int kgdb_chars; |
| 2316 | |
| 2317 | unsigned char |
| 2318 | getDebugChar(void) |
| 2319 | { |
| 2320 | if (kgdb_chars <= 0) { |
| 2321 | kgdb_chars = my_console_wait_key(0, 0, kgdb_buf); |
| 2322 | kgdp = kgdb_buf; |
| 2323 | } |
| 2324 | kgdb_chars--; |
| 2325 | |
| 2326 | return(*kgdp++); |
| 2327 | } |
| 2328 | |
| 2329 | void kgdb_interruptible(int state) |
| 2330 | { |
| 2331 | } |
| 2332 | void kgdb_map_scc(void) |
| 2333 | { |
| 2334 | struct serial_state *ser; |
| 2335 | uint mem_addr; |
| 2336 | volatile QUICC_BD *bdp; |
| 2337 | volatile smc_uart_t *up; |
| 2338 | |
| 2339 | cpmp = (cpm360_t *)&(((immap_t *)IMAP_ADDR)->im_cpm); |
| 2340 | |
| 2341 | /* To avoid data cache CPM DMA coherency problems, allocate a |
| 2342 | * buffer in the CPM DPRAM. This will work until the CPM and |
| 2343 | * serial ports are initialized. At that time a memory buffer |
| 2344 | * will be allocated. |
| 2345 | * The port is already initialized from the boot procedure, all |
| 2346 | * we do here is give it a different buffer and make it a FIFO. |
| 2347 | */ |
| 2348 | |
| 2349 | ser = rs_table; |
| 2350 | |
| 2351 | /* Right now, assume we are using SMCs. |
| 2352 | */ |
| 2353 | up = (smc_uart_t *)&cpmp->cp_dparam[ser->port]; |
| 2354 | |
| 2355 | /* Allocate space for an input FIFO, plus a few bytes for output. |
| 2356 | * Allocate bytes to maintain word alignment. |
| 2357 | */ |
| 2358 | mem_addr = (uint)(&cpmp->cp_dpmem[0x1000]); |
| 2359 | |
| 2360 | /* Set the physical address of the host memory buffers in |
| 2361 | * the buffer descriptors. |
| 2362 | */ |
| 2363 | bdp = (QUICC_BD *)&cpmp->cp_dpmem[up->smc_rbase]; |
| 2364 | bdp->buf = mem_addr; |
| 2365 | |
| 2366 | bdp = (QUICC_BD *)&cpmp->cp_dpmem[up->smc_tbase]; |
| 2367 | bdp->buf = mem_addr+RX_BUF_SIZE; |
| 2368 | |
| 2369 | up->smc_mrblr = RX_BUF_SIZE; /* receive buffer length */ |
| 2370 | up->smc_maxidl = RX_BUF_SIZE; |
| 2371 | } |
| 2372 | #endif |
| 2373 | |
| 2374 | static struct tty_struct *serial_console_device(struct console *c, int *index) |
| 2375 | { |
| 2376 | *index = c->index; |
| 2377 | return serial_driver; |
| 2378 | } |
| 2379 | |
| 2380 | |
| 2381 | struct console sercons = { |
| 2382 | .name = "ttyS", |
| 2383 | .write = serial_console_write, |
| 2384 | .device = serial_console_device, |
| 2385 | .wait_key = serial_console_wait_key, |
| 2386 | .setup = serial_console_setup, |
| 2387 | .flags = CON_PRINTBUFFER, |
| 2388 | .index = CONFIG_SERIAL_CONSOLE_PORT, |
| 2389 | }; |
| 2390 | |
| 2391 | |
| 2392 | |
| 2393 | /* |
| 2394 | * Register console. |
| 2395 | */ |
| 2396 | long console_360_init(long kmem_start, long kmem_end) |
| 2397 | { |
| 2398 | register_console(&sercons); |
| 2399 | /*register_console (console_print_68360); - 2.0.38 only required a write |
| 2400 | function pointer. */ |
| 2401 | return kmem_start; |
| 2402 | } |
| 2403 | |
| 2404 | #endif |
| 2405 | |
| 2406 | /* Index in baud rate table of the default console baud rate. |
| 2407 | */ |
| 2408 | static int baud_idx; |
| 2409 | |
Jeff Dike | b68e31d | 2006-10-02 02:17:18 -0700 | [diff] [blame] | 2410 | static const struct tty_operations rs_360_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2411 | .owner = THIS_MODULE, |
| 2412 | .open = rs_360_open, |
| 2413 | .close = rs_360_close, |
| 2414 | .write = rs_360_write, |
| 2415 | .put_char = rs_360_put_char, |
| 2416 | .write_room = rs_360_write_room, |
| 2417 | .chars_in_buffer = rs_360_chars_in_buffer, |
| 2418 | .flush_buffer = rs_360_flush_buffer, |
| 2419 | .ioctl = rs_360_ioctl, |
| 2420 | .throttle = rs_360_throttle, |
| 2421 | .unthrottle = rs_360_unthrottle, |
| 2422 | /* .send_xchar = rs_360_send_xchar, */ |
| 2423 | .set_termios = rs_360_set_termios, |
| 2424 | .stop = rs_360_stop, |
| 2425 | .start = rs_360_start, |
| 2426 | .hangup = rs_360_hangup, |
| 2427 | /* .wait_until_sent = rs_360_wait_until_sent, */ |
| 2428 | /* .read_proc = rs_360_read_proc, */ |
| 2429 | .tiocmget = rs_360_tiocmget, |
| 2430 | .tiocmset = rs_360_tiocmset, |
| 2431 | }; |
| 2432 | |
Christoph Hellwig | a100777 | 2005-09-06 15:16:59 -0700 | [diff] [blame] | 2433 | static int __init rs_360_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2434 | { |
| 2435 | struct serial_state * state; |
| 2436 | ser_info_t *info; |
| 2437 | void *mem_addr; |
| 2438 | uint dp_addr, iobits; |
| 2439 | int i, j, idx; |
| 2440 | ushort chan; |
| 2441 | QUICC_BD *bdp; |
| 2442 | volatile QUICC *cp; |
| 2443 | volatile struct smc_regs *sp; |
| 2444 | volatile struct smc_uart_pram *up; |
| 2445 | volatile struct scc_regs *scp; |
| 2446 | volatile struct uart_pram *sup; |
| 2447 | /* volatile immap_t *immap; */ |
| 2448 | |
| 2449 | serial_driver = alloc_tty_driver(NR_PORTS); |
| 2450 | if (!serial_driver) |
| 2451 | return -1; |
| 2452 | |
| 2453 | show_serial_version(); |
| 2454 | |
| 2455 | serial_driver->name = "ttyS"; |
| 2456 | serial_driver->major = TTY_MAJOR; |
| 2457 | serial_driver->minor_start = 64; |
| 2458 | serial_driver->type = TTY_DRIVER_TYPE_SERIAL; |
| 2459 | serial_driver->subtype = SERIAL_TYPE_NORMAL; |
| 2460 | serial_driver->init_termios = tty_std_termios; |
| 2461 | serial_driver->init_termios.c_cflag = |
| 2462 | baud_idx | CS8 | CREAD | HUPCL | CLOCAL; |
| 2463 | serial_driver->flags = TTY_DRIVER_REAL_RAW; |
| 2464 | tty_set_operations(serial_driver, &rs_360_ops); |
| 2465 | |
| 2466 | if (tty_register_driver(serial_driver)) |
| 2467 | panic("Couldn't register serial driver\n"); |
| 2468 | |
| 2469 | cp = pquicc; /* Get pointer to Communication Processor */ |
| 2470 | /* immap = (immap_t *)IMAP_ADDR; */ /* and to internal registers */ |
| 2471 | |
| 2472 | |
| 2473 | /* Configure SCC2, SCC3, and SCC4 instead of port A parallel I/O. |
| 2474 | */ |
| 2475 | /* The "standard" configuration through the 860. |
| 2476 | */ |
| 2477 | /* immap->im_ioport.iop_papar |= 0x00fc; */ |
| 2478 | /* immap->im_ioport.iop_padir &= ~0x00fc; */ |
| 2479 | /* immap->im_ioport.iop_paodr &= ~0x00fc; */ |
| 2480 | cp->pio_papar |= 0x00fc; |
| 2481 | cp->pio_padir &= ~0x00fc; |
| 2482 | /* cp->pio_paodr &= ~0x00fc; */ |
| 2483 | |
| 2484 | |
| 2485 | /* Since we don't yet do modem control, connect the port C pins |
| 2486 | * as general purpose I/O. This will assert CTS and CD for the |
| 2487 | * SCC ports. |
| 2488 | */ |
| 2489 | /* FIXME: see 360um p.7-365 and 860um p.34-12 |
| 2490 | * I can't make sense of these bits - mleslie*/ |
| 2491 | /* immap->im_ioport.iop_pcdir |= 0x03c6; */ |
| 2492 | /* immap->im_ioport.iop_pcpar &= ~0x03c6; */ |
| 2493 | |
| 2494 | /* cp->pio_pcdir |= 0x03c6; */ |
| 2495 | /* cp->pio_pcpar &= ~0x03c6; */ |
| 2496 | |
| 2497 | |
| 2498 | |
| 2499 | /* Connect SCC2 and SCC3 to NMSI. Connect BRG3 to SCC2 and |
| 2500 | * BRG4 to SCC3. |
| 2501 | */ |
| 2502 | cp->si_sicr &= ~0x00ffff00; |
| 2503 | cp->si_sicr |= 0x001b1200; |
| 2504 | |
| 2505 | #ifdef CONFIG_PP04 |
| 2506 | /* Frequentis PP04 forced to RS-232 until we know better. |
| 2507 | * Port C 12 and 13 low enables RS-232 on SCC3 and SCC4. |
| 2508 | */ |
| 2509 | immap->im_ioport.iop_pcdir |= 0x000c; |
| 2510 | immap->im_ioport.iop_pcpar &= ~0x000c; |
| 2511 | immap->im_ioport.iop_pcdat &= ~0x000c; |
| 2512 | |
| 2513 | /* This enables the TX driver. |
| 2514 | */ |
| 2515 | cp->cp_pbpar &= ~0x6000; |
| 2516 | cp->cp_pbdat &= ~0x6000; |
| 2517 | #endif |
| 2518 | |
| 2519 | for (i = 0, state = rs_table; i < NR_PORTS; i++,state++) { |
| 2520 | state->magic = SSTATE_MAGIC; |
| 2521 | state->line = i; |
| 2522 | state->type = PORT_UNKNOWN; |
| 2523 | state->custom_divisor = 0; |
| 2524 | state->close_delay = 5*HZ/10; |
| 2525 | state->closing_wait = 30*HZ; |
| 2526 | state->icount.cts = state->icount.dsr = |
| 2527 | state->icount.rng = state->icount.dcd = 0; |
| 2528 | state->icount.rx = state->icount.tx = 0; |
| 2529 | state->icount.frame = state->icount.parity = 0; |
| 2530 | state->icount.overrun = state->icount.brk = 0; |
| 2531 | printk(KERN_INFO "ttyS%d at irq 0x%02x is an %s\n", |
| 2532 | i, (unsigned int)(state->irq), |
| 2533 | (state->smc_scc_num & NUM_IS_SCC) ? "SCC" : "SMC"); |
| 2534 | |
| 2535 | #ifdef CONFIG_SERIAL_CONSOLE |
| 2536 | /* If we just printed the message on the console port, and |
| 2537 | * we are about to initialize it for general use, we have |
| 2538 | * to wait a couple of character times for the CR/NL to |
| 2539 | * make it out of the transmit buffer. |
| 2540 | */ |
| 2541 | if (i == CONFIG_SERIAL_CONSOLE_PORT) |
| 2542 | mdelay(8); |
| 2543 | |
| 2544 | |
| 2545 | /* idx = PORT_NUM(info->state->smc_scc_num); */ |
| 2546 | /* if (info->state->smc_scc_num & NUM_IS_SCC) */ |
| 2547 | /* chan = scc_chan_map[idx]; */ |
| 2548 | /* else */ |
| 2549 | /* chan = smc_chan_map[idx]; */ |
| 2550 | |
| 2551 | /* cp->cp_cr = mk_cr_cmd(chan, CPM_CR_STOP_TX) | CPM_CR_FLG; */ |
| 2552 | /* while (cp->cp_cr & CPM_CR_FLG); */ |
| 2553 | |
| 2554 | #endif |
| 2555 | /* info = kmalloc(sizeof(ser_info_t), GFP_KERNEL); */ |
| 2556 | info = &quicc_ser_info[i]; |
| 2557 | if (info) { |
| 2558 | memset (info, 0, sizeof(ser_info_t)); |
| 2559 | info->magic = SERIAL_MAGIC; |
| 2560 | info->line = i; |
| 2561 | info->flags = state->flags; |
| 2562 | INIT_WORK(&info->tqueue, do_softint, info); |
| 2563 | INIT_WORK(&info->tqueue_hangup, do_serial_hangup, info); |
| 2564 | init_waitqueue_head(&info->open_wait); |
| 2565 | init_waitqueue_head(&info->close_wait); |
| 2566 | info->state = state; |
| 2567 | state->info = (struct async_struct *)info; |
| 2568 | |
| 2569 | /* We need to allocate a transmit and receive buffer |
| 2570 | * descriptors from dual port ram, and a character |
| 2571 | * buffer area from host mem. |
| 2572 | */ |
| 2573 | dp_addr = m360_cpm_dpalloc(sizeof(QUICC_BD) * RX_NUM_FIFO); |
| 2574 | |
| 2575 | /* Allocate space for FIFOs in the host memory. |
| 2576 | * (for now this is from a static array of buffers :( |
| 2577 | */ |
| 2578 | /* mem_addr = m360_cpm_hostalloc(RX_NUM_FIFO * RX_BUF_SIZE); */ |
| 2579 | /* mem_addr = kmalloc (RX_NUM_FIFO * RX_BUF_SIZE, GFP_BUFFER); */ |
| 2580 | mem_addr = &rx_buf_pool[i * RX_NUM_FIFO * RX_BUF_SIZE]; |
| 2581 | |
| 2582 | /* Set the physical address of the host memory |
| 2583 | * buffers in the buffer descriptors, and the |
| 2584 | * virtual address for us to work with. |
| 2585 | */ |
| 2586 | bdp = (QUICC_BD *)((uint)pquicc + dp_addr); |
| 2587 | info->rx_cur = info->rx_bd_base = bdp; |
| 2588 | |
| 2589 | /* initialize rx buffer descriptors */ |
| 2590 | for (j=0; j<(RX_NUM_FIFO-1); j++) { |
| 2591 | bdp->buf = &rx_buf_pool[(i * RX_NUM_FIFO + j ) * RX_BUF_SIZE]; |
| 2592 | bdp->status = BD_SC_EMPTY | BD_SC_INTRPT; |
| 2593 | mem_addr += RX_BUF_SIZE; |
| 2594 | bdp++; |
| 2595 | } |
| 2596 | bdp->buf = &rx_buf_pool[(i * RX_NUM_FIFO + j ) * RX_BUF_SIZE]; |
| 2597 | bdp->status = BD_SC_WRAP | BD_SC_EMPTY | BD_SC_INTRPT; |
| 2598 | |
| 2599 | |
| 2600 | idx = PORT_NUM(info->state->smc_scc_num); |
| 2601 | if (info->state->smc_scc_num & NUM_IS_SCC) { |
| 2602 | |
| 2603 | #if defined (CONFIG_UCQUICC) && 1 |
| 2604 | /* set the transceiver mode to RS232 */ |
| 2605 | sipex_mode_bits &= ~(uint)SIPEX_MODE(idx,0x0f); /* clear current mode */ |
| 2606 | sipex_mode_bits |= (uint)SIPEX_MODE(idx,0x02); |
| 2607 | *(uint *)_periph_base = sipex_mode_bits; |
| 2608 | /* printk ("sipex bits = 0x%08x\n", sipex_mode_bits); */ |
| 2609 | #endif |
| 2610 | } |
| 2611 | |
| 2612 | dp_addr = m360_cpm_dpalloc(sizeof(QUICC_BD) * TX_NUM_FIFO); |
| 2613 | |
| 2614 | /* Allocate space for FIFOs in the host memory. |
| 2615 | */ |
| 2616 | /* mem_addr = m360_cpm_hostalloc(TX_NUM_FIFO * TX_BUF_SIZE); */ |
| 2617 | /* mem_addr = kmalloc (TX_NUM_FIFO * TX_BUF_SIZE, GFP_BUFFER); */ |
| 2618 | mem_addr = &tx_buf_pool[i * TX_NUM_FIFO * TX_BUF_SIZE]; |
| 2619 | |
| 2620 | /* Set the physical address of the host memory |
| 2621 | * buffers in the buffer descriptors, and the |
| 2622 | * virtual address for us to work with. |
| 2623 | */ |
| 2624 | /* bdp = (QUICC_BD *)&cp->cp_dpmem[dp_addr]; */ |
| 2625 | bdp = (QUICC_BD *)((uint)pquicc + dp_addr); |
| 2626 | info->tx_cur = info->tx_bd_base = (QUICC_BD *)bdp; |
| 2627 | |
| 2628 | /* initialize tx buffer descriptors */ |
| 2629 | for (j=0; j<(TX_NUM_FIFO-1); j++) { |
| 2630 | bdp->buf = &tx_buf_pool[(i * TX_NUM_FIFO + j ) * TX_BUF_SIZE]; |
| 2631 | bdp->status = BD_SC_INTRPT; |
| 2632 | mem_addr += TX_BUF_SIZE; |
| 2633 | bdp++; |
| 2634 | } |
| 2635 | bdp->buf = &tx_buf_pool[(i * TX_NUM_FIFO + j ) * TX_BUF_SIZE]; |
| 2636 | bdp->status = (BD_SC_WRAP | BD_SC_INTRPT); |
| 2637 | |
| 2638 | if (info->state->smc_scc_num & NUM_IS_SCC) { |
| 2639 | scp = &pquicc->scc_regs[idx]; |
| 2640 | sup = &pquicc->pram[info->state->port].scc.pscc.u; |
| 2641 | sup->rbase = dp_addr; |
| 2642 | sup->tbase = dp_addr; |
| 2643 | |
| 2644 | /* Set up the uart parameters in the |
| 2645 | * parameter ram. |
| 2646 | */ |
| 2647 | sup->rfcr = SMC_EB; |
| 2648 | sup->tfcr = SMC_EB; |
| 2649 | |
| 2650 | /* Set this to 1 for now, so we get single |
| 2651 | * character interrupts. Using idle charater |
| 2652 | * time requires some additional tuning. |
| 2653 | */ |
| 2654 | sup->mrblr = 1; |
| 2655 | sup->max_idl = 0; |
| 2656 | sup->brkcr = 1; |
| 2657 | sup->parec = 0; |
| 2658 | sup->frmer = 0; |
| 2659 | sup->nosec = 0; |
| 2660 | sup->brkec = 0; |
| 2661 | sup->uaddr1 = 0; |
| 2662 | sup->uaddr2 = 0; |
| 2663 | sup->toseq = 0; |
| 2664 | { |
| 2665 | int i; |
| 2666 | for (i=0;i<8;i++) |
| 2667 | sup->cc[i] = 0x8000; |
| 2668 | } |
| 2669 | sup->rccm = 0xc0ff; |
| 2670 | |
| 2671 | /* Send the CPM an initialize command. |
| 2672 | */ |
| 2673 | chan = scc_chan_map[idx]; |
| 2674 | |
| 2675 | /* execute the INIT RX & TX PARAMS command for this channel. */ |
| 2676 | cp->cp_cr = mk_cr_cmd(chan, CPM_CR_INIT_TRX) | CPM_CR_FLG; |
| 2677 | while (cp->cp_cr & CPM_CR_FLG); |
| 2678 | |
| 2679 | /* Set UART mode, 8 bit, no parity, one stop. |
| 2680 | * Enable receive and transmit. |
| 2681 | */ |
| 2682 | scp->scc_gsmr.w.high = 0; |
| 2683 | scp->scc_gsmr.w.low = |
| 2684 | (SCC_GSMRL_MODE_UART | SCC_GSMRL_TDCR_16 | SCC_GSMRL_RDCR_16); |
| 2685 | |
| 2686 | /* Disable all interrupts and clear all pending |
| 2687 | * events. |
| 2688 | */ |
| 2689 | scp->scc_sccm = 0; |
| 2690 | scp->scc_scce = 0xffff; |
| 2691 | scp->scc_dsr = 0x7e7e; |
| 2692 | scp->scc_psmr = 0x3000; |
| 2693 | |
| 2694 | /* If the port is the console, enable Rx and Tx. |
| 2695 | */ |
| 2696 | #ifdef CONFIG_SERIAL_CONSOLE |
| 2697 | if (i == CONFIG_SERIAL_CONSOLE_PORT) |
| 2698 | scp->scc_gsmr.w.low |= (SCC_GSMRL_ENR | SCC_GSMRL_ENT); |
| 2699 | #endif |
| 2700 | } |
| 2701 | else { |
| 2702 | /* Configure SMCs Tx/Rx instead of port B |
| 2703 | * parallel I/O. |
| 2704 | */ |
| 2705 | up = &pquicc->pram[info->state->port].scc.pothers.idma_smc.psmc.u; |
| 2706 | up->rbase = dp_addr; |
| 2707 | |
| 2708 | iobits = 0xc0 << (idx * 4); |
| 2709 | cp->pip_pbpar |= iobits; |
| 2710 | cp->pip_pbdir &= ~iobits; |
| 2711 | cp->pip_pbodr &= ~iobits; |
| 2712 | |
| 2713 | |
| 2714 | /* Connect the baud rate generator to the |
| 2715 | * SMC based upon index in rs_table. Also |
| 2716 | * make sure it is connected to NMSI. |
| 2717 | */ |
| 2718 | cp->si_simode &= ~(0xffff << (idx * 16)); |
| 2719 | cp->si_simode |= (i << ((idx * 16) + 12)); |
| 2720 | |
| 2721 | up->tbase = dp_addr; |
| 2722 | |
| 2723 | /* Set up the uart parameters in the |
| 2724 | * parameter ram. |
| 2725 | */ |
| 2726 | up->rfcr = SMC_EB; |
| 2727 | up->tfcr = SMC_EB; |
| 2728 | |
| 2729 | /* Set this to 1 for now, so we get single |
| 2730 | * character interrupts. Using idle charater |
| 2731 | * time requires some additional tuning. |
| 2732 | */ |
| 2733 | up->mrblr = 1; |
| 2734 | up->max_idl = 0; |
| 2735 | up->brkcr = 1; |
| 2736 | |
| 2737 | /* Send the CPM an initialize command. |
| 2738 | */ |
| 2739 | chan = smc_chan_map[idx]; |
| 2740 | |
| 2741 | cp->cp_cr = mk_cr_cmd(chan, |
| 2742 | CPM_CR_INIT_TRX) | CPM_CR_FLG; |
| 2743 | #ifdef CONFIG_SERIAL_CONSOLE |
| 2744 | if (i == CONFIG_SERIAL_CONSOLE_PORT) |
| 2745 | printk(""); |
| 2746 | #endif |
| 2747 | while (cp->cp_cr & CPM_CR_FLG); |
| 2748 | |
| 2749 | /* Set UART mode, 8 bit, no parity, one stop. |
| 2750 | * Enable receive and transmit. |
| 2751 | */ |
| 2752 | sp = &cp->smc_regs[idx]; |
| 2753 | sp->smc_smcmr = smcr_mk_clen(9) | SMCMR_SM_UART; |
| 2754 | |
| 2755 | /* Disable all interrupts and clear all pending |
| 2756 | * events. |
| 2757 | */ |
| 2758 | sp->smc_smcm = 0; |
| 2759 | sp->smc_smce = 0xff; |
| 2760 | |
| 2761 | /* If the port is the console, enable Rx and Tx. |
| 2762 | */ |
| 2763 | #ifdef CONFIG_SERIAL_CONSOLE |
| 2764 | if (i == CONFIG_SERIAL_CONSOLE_PORT) |
| 2765 | sp->smc_smcmr |= SMCMR_REN | SMCMR_TEN; |
| 2766 | #endif |
| 2767 | } |
| 2768 | |
| 2769 | /* Install interrupt handler. |
| 2770 | */ |
| 2771 | /* cpm_install_handler(IRQ_MACHSPEC | state->irq, rs_360_interrupt, info); */ |
| 2772 | /*request_irq(IRQ_MACHSPEC | state->irq, rs_360_interrupt, */ |
| 2773 | request_irq(state->irq, rs_360_interrupt, |
| 2774 | IRQ_FLG_LOCK, "ttyS", (void *)info); |
| 2775 | |
| 2776 | /* Set up the baud rate generator. |
| 2777 | */ |
| 2778 | m360_cpm_setbrg(i, baud_table[baud_idx]); |
| 2779 | |
| 2780 | } |
| 2781 | } |
| 2782 | |
| 2783 | return 0; |
| 2784 | } |
Christoph Hellwig | a100777 | 2005-09-06 15:16:59 -0700 | [diff] [blame] | 2785 | module_init(rs_360_init); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2786 | |
| 2787 | /* This must always be called before the rs_360_init() function, otherwise |
| 2788 | * it blows away the port control information. |
| 2789 | */ |
| 2790 | //static int __init serial_console_setup( struct console *co, char *options) |
| 2791 | int serial_console_setup( struct console *co, char *options) |
| 2792 | { |
| 2793 | struct serial_state *ser; |
| 2794 | uint mem_addr, dp_addr, bidx, idx, iobits; |
| 2795 | ushort chan; |
| 2796 | QUICC_BD *bdp; |
| 2797 | volatile QUICC *cp; |
| 2798 | volatile struct smc_regs *sp; |
| 2799 | volatile struct scc_regs *scp; |
| 2800 | volatile struct smc_uart_pram *up; |
| 2801 | volatile struct uart_pram *sup; |
| 2802 | |
| 2803 | /* mleslie TODO: |
| 2804 | * add something to the 68k bootloader to store a desired initial console baud rate */ |
| 2805 | |
| 2806 | /* bd_t *bd; */ /* a board info struct used by EPPC-bug */ |
| 2807 | /* bd = (bd_t *)__res; */ |
| 2808 | |
| 2809 | for (bidx = 0; bidx < (sizeof(baud_table) / sizeof(int)); bidx++) |
| 2810 | /* if (bd->bi_baudrate == baud_table[bidx]) */ |
| 2811 | if (CONSOLE_BAUDRATE == baud_table[bidx]) |
| 2812 | break; |
| 2813 | |
| 2814 | /* co->cflag = CREAD|CLOCAL|bidx|CS8; */ |
| 2815 | baud_idx = bidx; |
| 2816 | |
| 2817 | ser = rs_table + CONFIG_SERIAL_CONSOLE_PORT; |
| 2818 | |
| 2819 | cp = pquicc; /* Get pointer to Communication Processor */ |
| 2820 | |
| 2821 | idx = PORT_NUM(ser->smc_scc_num); |
| 2822 | if (ser->smc_scc_num & NUM_IS_SCC) { |
| 2823 | |
| 2824 | /* TODO: need to set up SCC pin assignment etc. here */ |
| 2825 | |
| 2826 | } |
| 2827 | else { |
| 2828 | iobits = 0xc0 << (idx * 4); |
| 2829 | cp->pip_pbpar |= iobits; |
| 2830 | cp->pip_pbdir &= ~iobits; |
| 2831 | cp->pip_pbodr &= ~iobits; |
| 2832 | |
| 2833 | /* Connect the baud rate generator to the |
| 2834 | * SMC based upon index in rs_table. Also |
| 2835 | * make sure it is connected to NMSI. |
| 2836 | */ |
| 2837 | cp->si_simode &= ~(0xffff << (idx * 16)); |
| 2838 | cp->si_simode |= (idx << ((idx * 16) + 12)); |
| 2839 | } |
| 2840 | |
| 2841 | /* When we get here, the CPM has been reset, so we need |
| 2842 | * to configure the port. |
| 2843 | * We need to allocate a transmit and receive buffer descriptor |
| 2844 | * from dual port ram, and a character buffer area from host mem. |
| 2845 | */ |
| 2846 | |
| 2847 | /* Allocate space for two buffer descriptors in the DP ram. |
| 2848 | */ |
| 2849 | dp_addr = m360_cpm_dpalloc(sizeof(QUICC_BD) * CONSOLE_NUM_FIFO); |
| 2850 | |
| 2851 | /* Allocate space for two 2 byte FIFOs in the host memory. |
| 2852 | */ |
| 2853 | /* mem_addr = m360_cpm_hostalloc(8); */ |
| 2854 | mem_addr = (uint)console_fifos; |
| 2855 | |
| 2856 | |
| 2857 | /* Set the physical address of the host memory buffers in |
| 2858 | * the buffer descriptors. |
| 2859 | */ |
| 2860 | /* bdp = (QUICC_BD *)&cp->cp_dpmem[dp_addr]; */ |
| 2861 | bdp = (QUICC_BD *)((uint)pquicc + dp_addr); |
| 2862 | bdp->buf = (char *)mem_addr; |
| 2863 | (bdp+1)->buf = (char *)(mem_addr+4); |
| 2864 | |
| 2865 | /* For the receive, set empty and wrap. |
| 2866 | * For transmit, set wrap. |
| 2867 | */ |
| 2868 | bdp->status = BD_SC_EMPTY | BD_SC_WRAP; |
| 2869 | (bdp+1)->status = BD_SC_WRAP; |
| 2870 | |
| 2871 | /* Set up the uart parameters in the parameter ram. |
| 2872 | */ |
| 2873 | if (ser->smc_scc_num & NUM_IS_SCC) { |
| 2874 | scp = &cp->scc_regs[idx]; |
| 2875 | /* sup = (scc_uart_t *)&cp->cp_dparam[ser->port]; */ |
| 2876 | sup = &pquicc->pram[ser->port].scc.pscc.u; |
| 2877 | |
| 2878 | sup->rbase = dp_addr; |
| 2879 | sup->tbase = dp_addr + sizeof(QUICC_BD); |
| 2880 | |
| 2881 | /* Set up the uart parameters in the |
| 2882 | * parameter ram. |
| 2883 | */ |
| 2884 | sup->rfcr = SMC_EB; |
| 2885 | sup->tfcr = SMC_EB; |
| 2886 | |
| 2887 | /* Set this to 1 for now, so we get single |
| 2888 | * character interrupts. Using idle charater |
| 2889 | * time requires some additional tuning. |
| 2890 | */ |
| 2891 | sup->mrblr = 1; |
| 2892 | sup->max_idl = 0; |
| 2893 | sup->brkcr = 1; |
| 2894 | sup->parec = 0; |
| 2895 | sup->frmer = 0; |
| 2896 | sup->nosec = 0; |
| 2897 | sup->brkec = 0; |
| 2898 | sup->uaddr1 = 0; |
| 2899 | sup->uaddr2 = 0; |
| 2900 | sup->toseq = 0; |
| 2901 | { |
| 2902 | int i; |
| 2903 | for (i=0;i<8;i++) |
| 2904 | sup->cc[i] = 0x8000; |
| 2905 | } |
| 2906 | sup->rccm = 0xc0ff; |
| 2907 | |
| 2908 | /* Send the CPM an initialize command. |
| 2909 | */ |
| 2910 | chan = scc_chan_map[idx]; |
| 2911 | |
| 2912 | cp->cp_cr = mk_cr_cmd(chan, CPM_CR_INIT_TRX) | CPM_CR_FLG; |
| 2913 | while (cp->cp_cr & CPM_CR_FLG); |
| 2914 | |
| 2915 | /* Set UART mode, 8 bit, no parity, one stop. |
| 2916 | * Enable receive and transmit. |
| 2917 | */ |
| 2918 | scp->scc_gsmr.w.high = 0; |
| 2919 | scp->scc_gsmr.w.low = |
| 2920 | (SCC_GSMRL_MODE_UART | SCC_GSMRL_TDCR_16 | SCC_GSMRL_RDCR_16); |
| 2921 | |
| 2922 | /* Disable all interrupts and clear all pending |
| 2923 | * events. |
| 2924 | */ |
| 2925 | scp->scc_sccm = 0; |
| 2926 | scp->scc_scce = 0xffff; |
| 2927 | scp->scc_dsr = 0x7e7e; |
| 2928 | scp->scc_psmr = 0x3000; |
| 2929 | |
| 2930 | scp->scc_gsmr.w.low |= (SCC_GSMRL_ENR | SCC_GSMRL_ENT); |
| 2931 | |
| 2932 | } |
| 2933 | else { |
| 2934 | /* up = (smc_uart_t *)&cp->cp_dparam[ser->port]; */ |
| 2935 | up = &pquicc->pram[ser->port].scc.pothers.idma_smc.psmc.u; |
| 2936 | |
| 2937 | up->rbase = dp_addr; /* Base of receive buffer desc. */ |
| 2938 | up->tbase = dp_addr+sizeof(QUICC_BD); /* Base of xmt buffer desc. */ |
| 2939 | up->rfcr = SMC_EB; |
| 2940 | up->tfcr = SMC_EB; |
| 2941 | |
| 2942 | /* Set this to 1 for now, so we get single character interrupts. |
| 2943 | */ |
| 2944 | up->mrblr = 1; /* receive buffer length */ |
| 2945 | up->max_idl = 0; /* wait forever for next char */ |
| 2946 | |
| 2947 | /* Send the CPM an initialize command. |
| 2948 | */ |
| 2949 | chan = smc_chan_map[idx]; |
| 2950 | cp->cp_cr = mk_cr_cmd(chan, CPM_CR_INIT_TRX) | CPM_CR_FLG; |
| 2951 | while (cp->cp_cr & CPM_CR_FLG); |
| 2952 | |
| 2953 | /* Set UART mode, 8 bit, no parity, one stop. |
| 2954 | * Enable receive and transmit. |
| 2955 | */ |
| 2956 | sp = &cp->smc_regs[idx]; |
| 2957 | sp->smc_smcmr = smcr_mk_clen(9) | SMCMR_SM_UART; |
| 2958 | |
| 2959 | /* And finally, enable Rx and Tx. |
| 2960 | */ |
| 2961 | sp->smc_smcmr |= SMCMR_REN | SMCMR_TEN; |
| 2962 | } |
| 2963 | |
| 2964 | /* Set up the baud rate generator. |
| 2965 | */ |
| 2966 | /* m360_cpm_setbrg((ser - rs_table), bd->bi_baudrate); */ |
| 2967 | m360_cpm_setbrg((ser - rs_table), CONSOLE_BAUDRATE); |
| 2968 | |
| 2969 | return 0; |
| 2970 | } |
| 2971 | |
| 2972 | /* |
| 2973 | * Local variables: |
| 2974 | * c-indent-level: 4 |
| 2975 | * c-basic-offset: 4 |
| 2976 | * tab-width: 4 |
| 2977 | * End: |
| 2978 | */ |