David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1 | /* sunzilog.c: Zilog serial driver for Sparc systems. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | * |
| 3 | * Driver for Zilog serial chips found on Sun workstations and |
| 4 | * servers. This driver could actually be made more generic. |
| 5 | * |
| 6 | * This is based on the old drivers/sbus/char/zs.c code. A lot |
| 7 | * of code has been simply moved over directly from there but |
| 8 | * much has been rewritten. Credits therefore go out to Eddie |
| 9 | * C. Dost, Pete Zaitcev, Ted Ts'o and Alex Buell for their |
| 10 | * work there. |
| 11 | * |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 12 | * Copyright (C) 2002, 2006 David S. Miller (davem@davemloft.net) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | */ |
| 14 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | #include <linux/module.h> |
| 16 | #include <linux/kernel.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | #include <linux/errno.h> |
| 18 | #include <linux/delay.h> |
| 19 | #include <linux/tty.h> |
| 20 | #include <linux/tty_flip.h> |
| 21 | #include <linux/major.h> |
| 22 | #include <linux/string.h> |
| 23 | #include <linux/ptrace.h> |
| 24 | #include <linux/ioport.h> |
| 25 | #include <linux/slab.h> |
| 26 | #include <linux/circ_buf.h> |
| 27 | #include <linux/serial.h> |
| 28 | #include <linux/sysrq.h> |
| 29 | #include <linux/console.h> |
| 30 | #include <linux/spinlock.h> |
| 31 | #ifdef CONFIG_SERIO |
| 32 | #include <linux/serio.h> |
| 33 | #endif |
| 34 | #include <linux/init.h> |
| 35 | |
| 36 | #include <asm/io.h> |
| 37 | #include <asm/irq.h> |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 38 | #include <asm/prom.h> |
| 39 | #include <asm/of_device.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | |
| 41 | #if defined(CONFIG_SERIAL_SUNZILOG_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) |
| 42 | #define SUPPORT_SYSRQ |
| 43 | #endif |
| 44 | |
| 45 | #include <linux/serial_core.h> |
| 46 | |
| 47 | #include "suncore.h" |
| 48 | #include "sunzilog.h" |
| 49 | |
| 50 | /* On 32-bit sparcs we need to delay after register accesses |
| 51 | * to accommodate sun4 systems, but we do not need to flush writes. |
| 52 | * On 64-bit sparc we only need to flush single writes to ensure |
| 53 | * completion. |
| 54 | */ |
| 55 | #ifndef CONFIG_SPARC64 |
| 56 | #define ZSDELAY() udelay(5) |
| 57 | #define ZSDELAY_LONG() udelay(20) |
| 58 | #define ZS_WSYNC(channel) do { } while (0) |
| 59 | #else |
| 60 | #define ZSDELAY() |
| 61 | #define ZSDELAY_LONG() |
| 62 | #define ZS_WSYNC(__channel) \ |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 63 | readb(&((__channel)->control)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | #endif |
| 65 | |
| 66 | static int num_sunzilog; |
| 67 | #define NUM_SUNZILOG num_sunzilog |
| 68 | #define NUM_CHANNELS (NUM_SUNZILOG * 2) |
| 69 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | #define ZS_CLOCK 4915200 /* Zilog input clock rate. */ |
| 71 | #define ZS_CLOCK_DIVISOR 16 /* Divisor this driver uses. */ |
| 72 | |
| 73 | /* |
| 74 | * We wrap our port structure around the generic uart_port. |
| 75 | */ |
| 76 | struct uart_sunzilog_port { |
| 77 | struct uart_port port; |
| 78 | |
| 79 | /* IRQ servicing chain. */ |
| 80 | struct uart_sunzilog_port *next; |
| 81 | |
| 82 | /* Current values of Zilog write registers. */ |
| 83 | unsigned char curregs[NUM_ZSREGS]; |
| 84 | |
| 85 | unsigned int flags; |
| 86 | #define SUNZILOG_FLAG_CONS_KEYB 0x00000001 |
| 87 | #define SUNZILOG_FLAG_CONS_MOUSE 0x00000002 |
| 88 | #define SUNZILOG_FLAG_IS_CONS 0x00000004 |
| 89 | #define SUNZILOG_FLAG_IS_KGDB 0x00000008 |
| 90 | #define SUNZILOG_FLAG_MODEM_STATUS 0x00000010 |
| 91 | #define SUNZILOG_FLAG_IS_CHANNEL_A 0x00000020 |
| 92 | #define SUNZILOG_FLAG_REGS_HELD 0x00000040 |
| 93 | #define SUNZILOG_FLAG_TX_STOPPED 0x00000080 |
| 94 | #define SUNZILOG_FLAG_TX_ACTIVE 0x00000100 |
| 95 | |
| 96 | unsigned int cflag; |
| 97 | |
| 98 | unsigned char parity_mask; |
| 99 | unsigned char prev_status; |
| 100 | |
| 101 | #ifdef CONFIG_SERIO |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 102 | struct serio serio; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | int serio_open; |
| 104 | #endif |
| 105 | }; |
| 106 | |
| 107 | #define ZILOG_CHANNEL_FROM_PORT(PORT) ((struct zilog_channel __iomem *)((PORT)->membase)) |
| 108 | #define UART_ZILOG(PORT) ((struct uart_sunzilog_port *)(PORT)) |
| 109 | |
| 110 | #define ZS_IS_KEYB(UP) ((UP)->flags & SUNZILOG_FLAG_CONS_KEYB) |
| 111 | #define ZS_IS_MOUSE(UP) ((UP)->flags & SUNZILOG_FLAG_CONS_MOUSE) |
| 112 | #define ZS_IS_CONS(UP) ((UP)->flags & SUNZILOG_FLAG_IS_CONS) |
| 113 | #define ZS_IS_KGDB(UP) ((UP)->flags & SUNZILOG_FLAG_IS_KGDB) |
| 114 | #define ZS_WANTS_MODEM_STATUS(UP) ((UP)->flags & SUNZILOG_FLAG_MODEM_STATUS) |
| 115 | #define ZS_IS_CHANNEL_A(UP) ((UP)->flags & SUNZILOG_FLAG_IS_CHANNEL_A) |
| 116 | #define ZS_REGS_HELD(UP) ((UP)->flags & SUNZILOG_FLAG_REGS_HELD) |
| 117 | #define ZS_TX_STOPPED(UP) ((UP)->flags & SUNZILOG_FLAG_TX_STOPPED) |
| 118 | #define ZS_TX_ACTIVE(UP) ((UP)->flags & SUNZILOG_FLAG_TX_ACTIVE) |
| 119 | |
| 120 | /* Reading and writing Zilog8530 registers. The delays are to make this |
| 121 | * driver work on the Sun4 which needs a settling delay after each chip |
| 122 | * register access, other machines handle this in hardware via auxiliary |
| 123 | * flip-flops which implement the settle time we do in software. |
| 124 | * |
| 125 | * The port lock must be held and local IRQs must be disabled |
| 126 | * when {read,write}_zsreg is invoked. |
| 127 | */ |
| 128 | static unsigned char read_zsreg(struct zilog_channel __iomem *channel, |
| 129 | unsigned char reg) |
| 130 | { |
| 131 | unsigned char retval; |
| 132 | |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 133 | writeb(reg, &channel->control); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | ZSDELAY(); |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 135 | retval = readb(&channel->control); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | ZSDELAY(); |
| 137 | |
| 138 | return retval; |
| 139 | } |
| 140 | |
| 141 | static void write_zsreg(struct zilog_channel __iomem *channel, |
| 142 | unsigned char reg, unsigned char value) |
| 143 | { |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 144 | writeb(reg, &channel->control); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | ZSDELAY(); |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 146 | writeb(value, &channel->control); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | ZSDELAY(); |
| 148 | } |
| 149 | |
| 150 | static void sunzilog_clear_fifo(struct zilog_channel __iomem *channel) |
| 151 | { |
| 152 | int i; |
| 153 | |
| 154 | for (i = 0; i < 32; i++) { |
| 155 | unsigned char regval; |
| 156 | |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 157 | regval = readb(&channel->control); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | ZSDELAY(); |
| 159 | if (regval & Rx_CH_AV) |
| 160 | break; |
| 161 | |
| 162 | regval = read_zsreg(channel, R1); |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 163 | readb(&channel->data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | ZSDELAY(); |
| 165 | |
| 166 | if (regval & (PAR_ERR | Rx_OVR | CRC_ERR)) { |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 167 | writeb(ERR_RES, &channel->control); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | ZSDELAY(); |
| 169 | ZS_WSYNC(channel); |
| 170 | } |
| 171 | } |
| 172 | } |
| 173 | |
| 174 | /* This function must only be called when the TX is not busy. The UART |
| 175 | * port lock must be held and local interrupts disabled. |
| 176 | */ |
| 177 | static void __load_zsregs(struct zilog_channel __iomem *channel, unsigned char *regs) |
| 178 | { |
| 179 | int i; |
| 180 | |
| 181 | /* Let pending transmits finish. */ |
| 182 | for (i = 0; i < 1000; i++) { |
| 183 | unsigned char stat = read_zsreg(channel, R1); |
| 184 | if (stat & ALL_SNT) |
| 185 | break; |
| 186 | udelay(100); |
| 187 | } |
| 188 | |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 189 | writeb(ERR_RES, &channel->control); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | ZSDELAY(); |
| 191 | ZS_WSYNC(channel); |
| 192 | |
| 193 | sunzilog_clear_fifo(channel); |
| 194 | |
| 195 | /* Disable all interrupts. */ |
| 196 | write_zsreg(channel, R1, |
| 197 | regs[R1] & ~(RxINT_MASK | TxINT_ENAB | EXT_INT_ENAB)); |
| 198 | |
| 199 | /* Set parity, sync config, stop bits, and clock divisor. */ |
| 200 | write_zsreg(channel, R4, regs[R4]); |
| 201 | |
| 202 | /* Set misc. TX/RX control bits. */ |
| 203 | write_zsreg(channel, R10, regs[R10]); |
| 204 | |
| 205 | /* Set TX/RX controls sans the enable bits. */ |
| 206 | write_zsreg(channel, R3, regs[R3] & ~RxENAB); |
| 207 | write_zsreg(channel, R5, regs[R5] & ~TxENAB); |
| 208 | |
| 209 | /* Synchronous mode config. */ |
| 210 | write_zsreg(channel, R6, regs[R6]); |
| 211 | write_zsreg(channel, R7, regs[R7]); |
| 212 | |
| 213 | /* Don't mess with the interrupt vector (R2, unused by us) and |
| 214 | * master interrupt control (R9). We make sure this is setup |
| 215 | * properly at probe time then never touch it again. |
| 216 | */ |
| 217 | |
| 218 | /* Disable baud generator. */ |
| 219 | write_zsreg(channel, R14, regs[R14] & ~BRENAB); |
| 220 | |
| 221 | /* Clock mode control. */ |
| 222 | write_zsreg(channel, R11, regs[R11]); |
| 223 | |
| 224 | /* Lower and upper byte of baud rate generator divisor. */ |
| 225 | write_zsreg(channel, R12, regs[R12]); |
| 226 | write_zsreg(channel, R13, regs[R13]); |
| 227 | |
| 228 | /* Now rewrite R14, with BRENAB (if set). */ |
| 229 | write_zsreg(channel, R14, regs[R14]); |
| 230 | |
| 231 | /* External status interrupt control. */ |
| 232 | write_zsreg(channel, R15, regs[R15]); |
| 233 | |
| 234 | /* Reset external status interrupts. */ |
| 235 | write_zsreg(channel, R0, RES_EXT_INT); |
| 236 | write_zsreg(channel, R0, RES_EXT_INT); |
| 237 | |
| 238 | /* Rewrite R3/R5, this time without enables masked. */ |
| 239 | write_zsreg(channel, R3, regs[R3]); |
| 240 | write_zsreg(channel, R5, regs[R5]); |
| 241 | |
| 242 | /* Rewrite R1, this time without IRQ enabled masked. */ |
| 243 | write_zsreg(channel, R1, regs[R1]); |
| 244 | } |
| 245 | |
| 246 | /* Reprogram the Zilog channel HW registers with the copies found in the |
| 247 | * software state struct. If the transmitter is busy, we defer this update |
| 248 | * until the next TX complete interrupt. Else, we do it right now. |
| 249 | * |
| 250 | * The UART port lock must be held and local interrupts disabled. |
| 251 | */ |
| 252 | static void sunzilog_maybe_update_regs(struct uart_sunzilog_port *up, |
| 253 | struct zilog_channel __iomem *channel) |
| 254 | { |
| 255 | if (!ZS_REGS_HELD(up)) { |
| 256 | if (ZS_TX_ACTIVE(up)) { |
| 257 | up->flags |= SUNZILOG_FLAG_REGS_HELD; |
| 258 | } else { |
| 259 | __load_zsregs(channel, up->curregs); |
| 260 | } |
| 261 | } |
| 262 | } |
| 263 | |
| 264 | static void sunzilog_change_mouse_baud(struct uart_sunzilog_port *up) |
| 265 | { |
| 266 | unsigned int cur_cflag = up->cflag; |
| 267 | int brg, new_baud; |
| 268 | |
| 269 | up->cflag &= ~CBAUD; |
| 270 | up->cflag |= suncore_mouse_baud_cflag_next(cur_cflag, &new_baud); |
| 271 | |
| 272 | brg = BPS_TO_BRG(new_baud, ZS_CLOCK / ZS_CLOCK_DIVISOR); |
| 273 | up->curregs[R12] = (brg & 0xff); |
| 274 | up->curregs[R13] = (brg >> 8) & 0xff; |
| 275 | sunzilog_maybe_update_regs(up, ZILOG_CHANNEL_FROM_PORT(&up->port)); |
| 276 | } |
| 277 | |
| 278 | static void sunzilog_kbdms_receive_chars(struct uart_sunzilog_port *up, |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 279 | unsigned char ch, int is_break) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | { |
| 281 | if (ZS_IS_KEYB(up)) { |
| 282 | /* Stop-A is handled by drivers/char/keyboard.c now. */ |
| 283 | #ifdef CONFIG_SERIO |
| 284 | if (up->serio_open) |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 285 | serio_interrupt(&up->serio, ch, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 286 | #endif |
| 287 | } else if (ZS_IS_MOUSE(up)) { |
| 288 | int ret = suncore_mouse_baud_detection(ch, is_break); |
| 289 | |
| 290 | switch (ret) { |
| 291 | case 2: |
| 292 | sunzilog_change_mouse_baud(up); |
| 293 | /* fallthru */ |
| 294 | case 1: |
| 295 | break; |
| 296 | |
| 297 | case 0: |
| 298 | #ifdef CONFIG_SERIO |
| 299 | if (up->serio_open) |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 300 | serio_interrupt(&up->serio, ch, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 301 | #endif |
| 302 | break; |
| 303 | }; |
| 304 | } |
| 305 | } |
| 306 | |
| 307 | static struct tty_struct * |
| 308 | sunzilog_receive_chars(struct uart_sunzilog_port *up, |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 309 | struct zilog_channel __iomem *channel) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 310 | { |
| 311 | struct tty_struct *tty; |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 312 | unsigned char ch, r1, flag; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 313 | |
| 314 | tty = NULL; |
| 315 | if (up->port.info != NULL && /* Unopened serial console */ |
| 316 | up->port.info->tty != NULL) /* Keyboard || mouse */ |
| 317 | tty = up->port.info->tty; |
| 318 | |
| 319 | for (;;) { |
| 320 | |
| 321 | r1 = read_zsreg(channel, R1); |
| 322 | if (r1 & (PAR_ERR | Rx_OVR | CRC_ERR)) { |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 323 | writeb(ERR_RES, &channel->control); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 324 | ZSDELAY(); |
| 325 | ZS_WSYNC(channel); |
| 326 | } |
| 327 | |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 328 | ch = readb(&channel->control); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 329 | ZSDELAY(); |
| 330 | |
| 331 | /* This funny hack depends upon BRK_ABRT not interfering |
| 332 | * with the other bits we care about in R1. |
| 333 | */ |
| 334 | if (ch & BRK_ABRT) |
| 335 | r1 |= BRK_ABRT; |
| 336 | |
| 337 | if (!(ch & Rx_CH_AV)) |
| 338 | break; |
| 339 | |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 340 | ch = readb(&channel->data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 341 | ZSDELAY(); |
| 342 | |
| 343 | ch &= up->parity_mask; |
| 344 | |
| 345 | if (unlikely(ZS_IS_KEYB(up)) || unlikely(ZS_IS_MOUSE(up))) { |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 346 | sunzilog_kbdms_receive_chars(up, ch, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | continue; |
| 348 | } |
| 349 | |
| 350 | if (tty == NULL) { |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 351 | uart_handle_sysrq_char(&up->port, ch); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 352 | continue; |
| 353 | } |
| 354 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 355 | /* A real serial line, record the character and status. */ |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 356 | flag = TTY_NORMAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 357 | up->port.icount.rx++; |
| 358 | if (r1 & (BRK_ABRT | PAR_ERR | Rx_OVR | CRC_ERR)) { |
| 359 | if (r1 & BRK_ABRT) { |
| 360 | r1 &= ~(PAR_ERR | CRC_ERR); |
| 361 | up->port.icount.brk++; |
| 362 | if (uart_handle_break(&up->port)) |
| 363 | continue; |
| 364 | } |
| 365 | else if (r1 & PAR_ERR) |
| 366 | up->port.icount.parity++; |
| 367 | else if (r1 & CRC_ERR) |
| 368 | up->port.icount.frame++; |
| 369 | if (r1 & Rx_OVR) |
| 370 | up->port.icount.overrun++; |
| 371 | r1 &= up->port.read_status_mask; |
| 372 | if (r1 & BRK_ABRT) |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 373 | flag = TTY_BREAK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 374 | else if (r1 & PAR_ERR) |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 375 | flag = TTY_PARITY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | else if (r1 & CRC_ERR) |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 377 | flag = TTY_FRAME; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | } |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 379 | if (uart_handle_sysrq_char(&up->port, ch)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | continue; |
| 381 | |
| 382 | if (up->port.ignore_status_mask == 0xff || |
| 383 | (r1 & up->port.ignore_status_mask) == 0) { |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 384 | tty_insert_flip_char(tty, ch, flag); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 385 | } |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 386 | if (r1 & Rx_OVR) |
| 387 | tty_insert_flip_char(tty, 0, TTY_OVERRUN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 388 | } |
| 389 | |
| 390 | return tty; |
| 391 | } |
| 392 | |
| 393 | static void sunzilog_status_handle(struct uart_sunzilog_port *up, |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 394 | struct zilog_channel __iomem *channel) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 395 | { |
| 396 | unsigned char status; |
| 397 | |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 398 | status = readb(&channel->control); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 399 | ZSDELAY(); |
| 400 | |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 401 | writeb(RES_EXT_INT, &channel->control); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 402 | ZSDELAY(); |
| 403 | ZS_WSYNC(channel); |
| 404 | |
| 405 | if (status & BRK_ABRT) { |
| 406 | if (ZS_IS_MOUSE(up)) |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 407 | sunzilog_kbdms_receive_chars(up, 0, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 408 | if (ZS_IS_CONS(up)) { |
| 409 | /* Wait for BREAK to deassert to avoid potentially |
| 410 | * confusing the PROM. |
| 411 | */ |
| 412 | while (1) { |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 413 | status = readb(&channel->control); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 414 | ZSDELAY(); |
| 415 | if (!(status & BRK_ABRT)) |
| 416 | break; |
| 417 | } |
| 418 | sun_do_break(); |
| 419 | return; |
| 420 | } |
| 421 | } |
| 422 | |
| 423 | if (ZS_WANTS_MODEM_STATUS(up)) { |
| 424 | if (status & SYNC) |
| 425 | up->port.icount.dsr++; |
| 426 | |
| 427 | /* The Zilog just gives us an interrupt when DCD/CTS/etc. change. |
| 428 | * But it does not tell us which bit has changed, we have to keep |
| 429 | * track of this ourselves. |
| 430 | */ |
| 431 | if ((status ^ up->prev_status) ^ DCD) |
| 432 | uart_handle_dcd_change(&up->port, |
| 433 | (status & DCD)); |
| 434 | if ((status ^ up->prev_status) ^ CTS) |
| 435 | uart_handle_cts_change(&up->port, |
| 436 | (status & CTS)); |
| 437 | |
| 438 | wake_up_interruptible(&up->port.info->delta_msr_wait); |
| 439 | } |
| 440 | |
| 441 | up->prev_status = status; |
| 442 | } |
| 443 | |
| 444 | static void sunzilog_transmit_chars(struct uart_sunzilog_port *up, |
| 445 | struct zilog_channel __iomem *channel) |
| 446 | { |
| 447 | struct circ_buf *xmit; |
| 448 | |
| 449 | if (ZS_IS_CONS(up)) { |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 450 | unsigned char status = readb(&channel->control); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 451 | ZSDELAY(); |
| 452 | |
| 453 | /* TX still busy? Just wait for the next TX done interrupt. |
| 454 | * |
| 455 | * It can occur because of how we do serial console writes. It would |
| 456 | * be nice to transmit console writes just like we normally would for |
| 457 | * a TTY line. (ie. buffered and TX interrupt driven). That is not |
| 458 | * easy because console writes cannot sleep. One solution might be |
| 459 | * to poll on enough port->xmit space becomming free. -DaveM |
| 460 | */ |
| 461 | if (!(status & Tx_BUF_EMP)) |
| 462 | return; |
| 463 | } |
| 464 | |
| 465 | up->flags &= ~SUNZILOG_FLAG_TX_ACTIVE; |
| 466 | |
| 467 | if (ZS_REGS_HELD(up)) { |
| 468 | __load_zsregs(channel, up->curregs); |
| 469 | up->flags &= ~SUNZILOG_FLAG_REGS_HELD; |
| 470 | } |
| 471 | |
| 472 | if (ZS_TX_STOPPED(up)) { |
| 473 | up->flags &= ~SUNZILOG_FLAG_TX_STOPPED; |
| 474 | goto ack_tx_int; |
| 475 | } |
| 476 | |
| 477 | if (up->port.x_char) { |
| 478 | up->flags |= SUNZILOG_FLAG_TX_ACTIVE; |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 479 | writeb(up->port.x_char, &channel->data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 480 | ZSDELAY(); |
| 481 | ZS_WSYNC(channel); |
| 482 | |
| 483 | up->port.icount.tx++; |
| 484 | up->port.x_char = 0; |
| 485 | return; |
| 486 | } |
| 487 | |
| 488 | if (up->port.info == NULL) |
| 489 | goto ack_tx_int; |
| 490 | xmit = &up->port.info->xmit; |
David S. Miller | b8df110 | 2005-10-10 20:43:22 -0700 | [diff] [blame] | 491 | if (uart_circ_empty(xmit)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 492 | goto ack_tx_int; |
David S. Miller | b8df110 | 2005-10-10 20:43:22 -0700 | [diff] [blame] | 493 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 494 | if (uart_tx_stopped(&up->port)) |
| 495 | goto ack_tx_int; |
| 496 | |
| 497 | up->flags |= SUNZILOG_FLAG_TX_ACTIVE; |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 498 | writeb(xmit->buf[xmit->tail], &channel->data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 499 | ZSDELAY(); |
| 500 | ZS_WSYNC(channel); |
| 501 | |
| 502 | xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); |
| 503 | up->port.icount.tx++; |
| 504 | |
| 505 | if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) |
| 506 | uart_write_wakeup(&up->port); |
| 507 | |
| 508 | return; |
| 509 | |
| 510 | ack_tx_int: |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 511 | writeb(RES_Tx_P, &channel->control); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 512 | ZSDELAY(); |
| 513 | ZS_WSYNC(channel); |
| 514 | } |
| 515 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 516 | static irqreturn_t sunzilog_interrupt(int irq, void *dev_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 517 | { |
| 518 | struct uart_sunzilog_port *up = dev_id; |
| 519 | |
| 520 | while (up) { |
| 521 | struct zilog_channel __iomem *channel |
| 522 | = ZILOG_CHANNEL_FROM_PORT(&up->port); |
| 523 | struct tty_struct *tty; |
| 524 | unsigned char r3; |
| 525 | |
| 526 | spin_lock(&up->port.lock); |
| 527 | r3 = read_zsreg(channel, R3); |
| 528 | |
| 529 | /* Channel A */ |
| 530 | tty = NULL; |
| 531 | if (r3 & (CHAEXT | CHATxIP | CHARxIP)) { |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 532 | writeb(RES_H_IUS, &channel->control); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 533 | ZSDELAY(); |
| 534 | ZS_WSYNC(channel); |
| 535 | |
| 536 | if (r3 & CHARxIP) |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 537 | tty = sunzilog_receive_chars(up, channel); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 538 | if (r3 & CHAEXT) |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 539 | sunzilog_status_handle(up, channel); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 540 | if (r3 & CHATxIP) |
| 541 | sunzilog_transmit_chars(up, channel); |
| 542 | } |
| 543 | spin_unlock(&up->port.lock); |
| 544 | |
| 545 | if (tty) |
| 546 | tty_flip_buffer_push(tty); |
| 547 | |
| 548 | /* Channel B */ |
| 549 | up = up->next; |
| 550 | channel = ZILOG_CHANNEL_FROM_PORT(&up->port); |
| 551 | |
| 552 | spin_lock(&up->port.lock); |
| 553 | tty = NULL; |
| 554 | if (r3 & (CHBEXT | CHBTxIP | CHBRxIP)) { |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 555 | writeb(RES_H_IUS, &channel->control); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 556 | ZSDELAY(); |
| 557 | ZS_WSYNC(channel); |
| 558 | |
| 559 | if (r3 & CHBRxIP) |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 560 | tty = sunzilog_receive_chars(up, channel); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 561 | if (r3 & CHBEXT) |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 562 | sunzilog_status_handle(up, channel); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 563 | if (r3 & CHBTxIP) |
| 564 | sunzilog_transmit_chars(up, channel); |
| 565 | } |
| 566 | spin_unlock(&up->port.lock); |
| 567 | |
| 568 | if (tty) |
| 569 | tty_flip_buffer_push(tty); |
| 570 | |
| 571 | up = up->next; |
| 572 | } |
| 573 | |
| 574 | return IRQ_HANDLED; |
| 575 | } |
| 576 | |
| 577 | /* A convenient way to quickly get R0 status. The caller must _not_ hold the |
| 578 | * port lock, it is acquired here. |
| 579 | */ |
| 580 | static __inline__ unsigned char sunzilog_read_channel_status(struct uart_port *port) |
| 581 | { |
| 582 | struct zilog_channel __iomem *channel; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 583 | unsigned char status; |
| 584 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 585 | channel = ZILOG_CHANNEL_FROM_PORT(port); |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 586 | status = readb(&channel->control); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 587 | ZSDELAY(); |
| 588 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 589 | return status; |
| 590 | } |
| 591 | |
| 592 | /* The port lock is not held. */ |
| 593 | static unsigned int sunzilog_tx_empty(struct uart_port *port) |
| 594 | { |
Russell King | c5f4644 | 2005-06-29 09:42:38 +0100 | [diff] [blame] | 595 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 596 | unsigned char status; |
| 597 | unsigned int ret; |
| 598 | |
Russell King | c5f4644 | 2005-06-29 09:42:38 +0100 | [diff] [blame] | 599 | spin_lock_irqsave(&port->lock, flags); |
| 600 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 601 | status = sunzilog_read_channel_status(port); |
Russell King | c5f4644 | 2005-06-29 09:42:38 +0100 | [diff] [blame] | 602 | |
| 603 | spin_unlock_irqrestore(&port->lock, flags); |
| 604 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 605 | if (status & Tx_BUF_EMP) |
| 606 | ret = TIOCSER_TEMT; |
| 607 | else |
| 608 | ret = 0; |
| 609 | |
| 610 | return ret; |
| 611 | } |
| 612 | |
Russell King | c5f4644 | 2005-06-29 09:42:38 +0100 | [diff] [blame] | 613 | /* The port lock is held and interrupts are disabled. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 614 | static unsigned int sunzilog_get_mctrl(struct uart_port *port) |
| 615 | { |
| 616 | unsigned char status; |
| 617 | unsigned int ret; |
| 618 | |
| 619 | status = sunzilog_read_channel_status(port); |
| 620 | |
| 621 | ret = 0; |
| 622 | if (status & DCD) |
| 623 | ret |= TIOCM_CAR; |
| 624 | if (status & SYNC) |
| 625 | ret |= TIOCM_DSR; |
| 626 | if (status & CTS) |
| 627 | ret |= TIOCM_CTS; |
| 628 | |
| 629 | return ret; |
| 630 | } |
| 631 | |
| 632 | /* The port lock is held and interrupts are disabled. */ |
| 633 | static void sunzilog_set_mctrl(struct uart_port *port, unsigned int mctrl) |
| 634 | { |
| 635 | struct uart_sunzilog_port *up = (struct uart_sunzilog_port *) port; |
| 636 | struct zilog_channel __iomem *channel = ZILOG_CHANNEL_FROM_PORT(port); |
| 637 | unsigned char set_bits, clear_bits; |
| 638 | |
| 639 | set_bits = clear_bits = 0; |
| 640 | |
| 641 | if (mctrl & TIOCM_RTS) |
| 642 | set_bits |= RTS; |
| 643 | else |
| 644 | clear_bits |= RTS; |
| 645 | if (mctrl & TIOCM_DTR) |
| 646 | set_bits |= DTR; |
| 647 | else |
| 648 | clear_bits |= DTR; |
| 649 | |
| 650 | /* NOTE: Not subject to 'transmitter active' rule. */ |
| 651 | up->curregs[R5] |= set_bits; |
| 652 | up->curregs[R5] &= ~clear_bits; |
| 653 | write_zsreg(channel, R5, up->curregs[R5]); |
| 654 | } |
| 655 | |
| 656 | /* The port lock is held and interrupts are disabled. */ |
Russell King | b129a8c | 2005-08-31 10:12:14 +0100 | [diff] [blame] | 657 | static void sunzilog_stop_tx(struct uart_port *port) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 658 | { |
| 659 | struct uart_sunzilog_port *up = (struct uart_sunzilog_port *) port; |
| 660 | |
| 661 | up->flags |= SUNZILOG_FLAG_TX_STOPPED; |
| 662 | } |
| 663 | |
| 664 | /* The port lock is held and interrupts are disabled. */ |
Russell King | b129a8c | 2005-08-31 10:12:14 +0100 | [diff] [blame] | 665 | static void sunzilog_start_tx(struct uart_port *port) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 666 | { |
| 667 | struct uart_sunzilog_port *up = (struct uart_sunzilog_port *) port; |
| 668 | struct zilog_channel __iomem *channel = ZILOG_CHANNEL_FROM_PORT(port); |
| 669 | unsigned char status; |
| 670 | |
| 671 | up->flags |= SUNZILOG_FLAG_TX_ACTIVE; |
| 672 | up->flags &= ~SUNZILOG_FLAG_TX_STOPPED; |
| 673 | |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 674 | status = readb(&channel->control); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 675 | ZSDELAY(); |
| 676 | |
| 677 | /* TX busy? Just wait for the TX done interrupt. */ |
| 678 | if (!(status & Tx_BUF_EMP)) |
| 679 | return; |
| 680 | |
| 681 | /* Send the first character to jump-start the TX done |
| 682 | * IRQ sending engine. |
| 683 | */ |
| 684 | if (port->x_char) { |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 685 | writeb(port->x_char, &channel->data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 686 | ZSDELAY(); |
| 687 | ZS_WSYNC(channel); |
| 688 | |
| 689 | port->icount.tx++; |
| 690 | port->x_char = 0; |
| 691 | } else { |
| 692 | struct circ_buf *xmit = &port->info->xmit; |
| 693 | |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 694 | writeb(xmit->buf[xmit->tail], &channel->data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 695 | ZSDELAY(); |
| 696 | ZS_WSYNC(channel); |
| 697 | |
| 698 | xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); |
| 699 | port->icount.tx++; |
| 700 | |
| 701 | if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) |
| 702 | uart_write_wakeup(&up->port); |
| 703 | } |
| 704 | } |
| 705 | |
| 706 | /* The port lock is held. */ |
| 707 | static void sunzilog_stop_rx(struct uart_port *port) |
| 708 | { |
| 709 | struct uart_sunzilog_port *up = UART_ZILOG(port); |
| 710 | struct zilog_channel __iomem *channel; |
| 711 | |
| 712 | if (ZS_IS_CONS(up)) |
| 713 | return; |
| 714 | |
| 715 | channel = ZILOG_CHANNEL_FROM_PORT(port); |
| 716 | |
| 717 | /* Disable all RX interrupts. */ |
| 718 | up->curregs[R1] &= ~RxINT_MASK; |
| 719 | sunzilog_maybe_update_regs(up, channel); |
| 720 | } |
| 721 | |
| 722 | /* The port lock is held. */ |
| 723 | static void sunzilog_enable_ms(struct uart_port *port) |
| 724 | { |
| 725 | struct uart_sunzilog_port *up = (struct uart_sunzilog_port *) port; |
| 726 | struct zilog_channel __iomem *channel = ZILOG_CHANNEL_FROM_PORT(port); |
| 727 | unsigned char new_reg; |
| 728 | |
| 729 | new_reg = up->curregs[R15] | (DCDIE | SYNCIE | CTSIE); |
| 730 | if (new_reg != up->curregs[R15]) { |
| 731 | up->curregs[R15] = new_reg; |
| 732 | |
| 733 | /* NOTE: Not subject to 'transmitter active' rule. */ |
| 734 | write_zsreg(channel, R15, up->curregs[R15]); |
| 735 | } |
| 736 | } |
| 737 | |
| 738 | /* The port lock is not held. */ |
| 739 | static void sunzilog_break_ctl(struct uart_port *port, int break_state) |
| 740 | { |
| 741 | struct uart_sunzilog_port *up = (struct uart_sunzilog_port *) port; |
| 742 | struct zilog_channel __iomem *channel = ZILOG_CHANNEL_FROM_PORT(port); |
| 743 | unsigned char set_bits, clear_bits, new_reg; |
| 744 | unsigned long flags; |
| 745 | |
| 746 | set_bits = clear_bits = 0; |
| 747 | |
| 748 | if (break_state) |
| 749 | set_bits |= SND_BRK; |
| 750 | else |
| 751 | clear_bits |= SND_BRK; |
| 752 | |
| 753 | spin_lock_irqsave(&port->lock, flags); |
| 754 | |
| 755 | new_reg = (up->curregs[R5] | set_bits) & ~clear_bits; |
| 756 | if (new_reg != up->curregs[R5]) { |
| 757 | up->curregs[R5] = new_reg; |
| 758 | |
| 759 | /* NOTE: Not subject to 'transmitter active' rule. */ |
| 760 | write_zsreg(channel, R5, up->curregs[R5]); |
| 761 | } |
| 762 | |
| 763 | spin_unlock_irqrestore(&port->lock, flags); |
| 764 | } |
| 765 | |
| 766 | static void __sunzilog_startup(struct uart_sunzilog_port *up) |
| 767 | { |
| 768 | struct zilog_channel __iomem *channel; |
| 769 | |
| 770 | channel = ZILOG_CHANNEL_FROM_PORT(&up->port); |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 771 | up->prev_status = readb(&channel->control); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 772 | |
| 773 | /* Enable receiver and transmitter. */ |
| 774 | up->curregs[R3] |= RxENAB; |
| 775 | up->curregs[R5] |= TxENAB; |
| 776 | |
| 777 | up->curregs[R1] |= EXT_INT_ENAB | INT_ALL_Rx | TxINT_ENAB; |
| 778 | sunzilog_maybe_update_regs(up, channel); |
| 779 | } |
| 780 | |
| 781 | static int sunzilog_startup(struct uart_port *port) |
| 782 | { |
| 783 | struct uart_sunzilog_port *up = UART_ZILOG(port); |
| 784 | unsigned long flags; |
| 785 | |
| 786 | if (ZS_IS_CONS(up)) |
| 787 | return 0; |
| 788 | |
| 789 | spin_lock_irqsave(&port->lock, flags); |
| 790 | __sunzilog_startup(up); |
| 791 | spin_unlock_irqrestore(&port->lock, flags); |
| 792 | return 0; |
| 793 | } |
| 794 | |
| 795 | /* |
| 796 | * The test for ZS_IS_CONS is explained by the following e-mail: |
| 797 | ***** |
| 798 | * From: Russell King <rmk@arm.linux.org.uk> |
| 799 | * Date: Sun, 8 Dec 2002 10:18:38 +0000 |
| 800 | * |
| 801 | * On Sun, Dec 08, 2002 at 02:43:36AM -0500, Pete Zaitcev wrote: |
| 802 | * > I boot my 2.5 boxes using "console=ttyS0,9600" argument, |
| 803 | * > and I noticed that something is not right with reference |
| 804 | * > counting in this case. It seems that when the console |
| 805 | * > is open by kernel initially, this is not accounted |
| 806 | * > as an open, and uart_startup is not called. |
| 807 | * |
| 808 | * That is correct. We are unable to call uart_startup when the serial |
| 809 | * console is initialised because it may need to allocate memory (as |
| 810 | * request_irq does) and the memory allocators may not have been |
| 811 | * initialised. |
| 812 | * |
| 813 | * 1. initialise the port into a state where it can send characters in the |
| 814 | * console write method. |
| 815 | * |
| 816 | * 2. don't do the actual hardware shutdown in your shutdown() method (but |
| 817 | * do the normal software shutdown - ie, free irqs etc) |
| 818 | ***** |
| 819 | */ |
| 820 | static void sunzilog_shutdown(struct uart_port *port) |
| 821 | { |
| 822 | struct uart_sunzilog_port *up = UART_ZILOG(port); |
| 823 | struct zilog_channel __iomem *channel; |
| 824 | unsigned long flags; |
| 825 | |
| 826 | if (ZS_IS_CONS(up)) |
| 827 | return; |
| 828 | |
| 829 | spin_lock_irqsave(&port->lock, flags); |
| 830 | |
| 831 | channel = ZILOG_CHANNEL_FROM_PORT(port); |
| 832 | |
| 833 | /* Disable receiver and transmitter. */ |
| 834 | up->curregs[R3] &= ~RxENAB; |
| 835 | up->curregs[R5] &= ~TxENAB; |
| 836 | |
| 837 | /* Disable all interrupts and BRK assertion. */ |
| 838 | up->curregs[R1] &= ~(EXT_INT_ENAB | TxINT_ENAB | RxINT_MASK); |
| 839 | up->curregs[R5] &= ~SND_BRK; |
| 840 | sunzilog_maybe_update_regs(up, channel); |
| 841 | |
| 842 | spin_unlock_irqrestore(&port->lock, flags); |
| 843 | } |
| 844 | |
| 845 | /* Shared by TTY driver and serial console setup. The port lock is held |
| 846 | * and local interrupts are disabled. |
| 847 | */ |
| 848 | static void |
| 849 | sunzilog_convert_to_zs(struct uart_sunzilog_port *up, unsigned int cflag, |
| 850 | unsigned int iflag, int brg) |
| 851 | { |
| 852 | |
| 853 | up->curregs[R10] = NRZ; |
| 854 | up->curregs[R11] = TCBR | RCBR; |
| 855 | |
| 856 | /* Program BAUD and clock source. */ |
| 857 | up->curregs[R4] &= ~XCLK_MASK; |
| 858 | up->curregs[R4] |= X16CLK; |
| 859 | up->curregs[R12] = brg & 0xff; |
| 860 | up->curregs[R13] = (brg >> 8) & 0xff; |
| 861 | up->curregs[R14] = BRSRC | BRENAB; |
| 862 | |
| 863 | /* Character size, stop bits, and parity. */ |
| 864 | up->curregs[3] &= ~RxN_MASK; |
| 865 | up->curregs[5] &= ~TxN_MASK; |
| 866 | switch (cflag & CSIZE) { |
| 867 | case CS5: |
| 868 | up->curregs[3] |= Rx5; |
| 869 | up->curregs[5] |= Tx5; |
| 870 | up->parity_mask = 0x1f; |
| 871 | break; |
| 872 | case CS6: |
| 873 | up->curregs[3] |= Rx6; |
| 874 | up->curregs[5] |= Tx6; |
| 875 | up->parity_mask = 0x3f; |
| 876 | break; |
| 877 | case CS7: |
| 878 | up->curregs[3] |= Rx7; |
| 879 | up->curregs[5] |= Tx7; |
| 880 | up->parity_mask = 0x7f; |
| 881 | break; |
| 882 | case CS8: |
| 883 | default: |
| 884 | up->curregs[3] |= Rx8; |
| 885 | up->curregs[5] |= Tx8; |
| 886 | up->parity_mask = 0xff; |
| 887 | break; |
| 888 | }; |
| 889 | up->curregs[4] &= ~0x0c; |
| 890 | if (cflag & CSTOPB) |
| 891 | up->curregs[4] |= SB2; |
| 892 | else |
| 893 | up->curregs[4] |= SB1; |
| 894 | if (cflag & PARENB) |
| 895 | up->curregs[4] |= PAR_ENAB; |
| 896 | else |
| 897 | up->curregs[4] &= ~PAR_ENAB; |
| 898 | if (!(cflag & PARODD)) |
| 899 | up->curregs[4] |= PAR_EVEN; |
| 900 | else |
| 901 | up->curregs[4] &= ~PAR_EVEN; |
| 902 | |
| 903 | up->port.read_status_mask = Rx_OVR; |
| 904 | if (iflag & INPCK) |
| 905 | up->port.read_status_mask |= CRC_ERR | PAR_ERR; |
| 906 | if (iflag & (BRKINT | PARMRK)) |
| 907 | up->port.read_status_mask |= BRK_ABRT; |
| 908 | |
| 909 | up->port.ignore_status_mask = 0; |
| 910 | if (iflag & IGNPAR) |
| 911 | up->port.ignore_status_mask |= CRC_ERR | PAR_ERR; |
| 912 | if (iflag & IGNBRK) { |
| 913 | up->port.ignore_status_mask |= BRK_ABRT; |
| 914 | if (iflag & IGNPAR) |
| 915 | up->port.ignore_status_mask |= Rx_OVR; |
| 916 | } |
| 917 | |
| 918 | if ((cflag & CREAD) == 0) |
| 919 | up->port.ignore_status_mask = 0xff; |
| 920 | } |
| 921 | |
| 922 | /* The port lock is not held. */ |
| 923 | static void |
Alan Cox | 606d099 | 2006-12-08 02:38:45 -0800 | [diff] [blame] | 924 | sunzilog_set_termios(struct uart_port *port, struct ktermios *termios, |
| 925 | struct ktermios *old) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 926 | { |
| 927 | struct uart_sunzilog_port *up = (struct uart_sunzilog_port *) port; |
| 928 | unsigned long flags; |
| 929 | int baud, brg; |
| 930 | |
| 931 | baud = uart_get_baud_rate(port, termios, old, 1200, 76800); |
| 932 | |
| 933 | spin_lock_irqsave(&up->port.lock, flags); |
| 934 | |
| 935 | brg = BPS_TO_BRG(baud, ZS_CLOCK / ZS_CLOCK_DIVISOR); |
| 936 | |
| 937 | sunzilog_convert_to_zs(up, termios->c_cflag, termios->c_iflag, brg); |
| 938 | |
| 939 | if (UART_ENABLE_MS(&up->port, termios->c_cflag)) |
| 940 | up->flags |= SUNZILOG_FLAG_MODEM_STATUS; |
| 941 | else |
| 942 | up->flags &= ~SUNZILOG_FLAG_MODEM_STATUS; |
| 943 | |
| 944 | up->cflag = termios->c_cflag; |
| 945 | |
| 946 | sunzilog_maybe_update_regs(up, ZILOG_CHANNEL_FROM_PORT(port)); |
| 947 | |
| 948 | uart_update_timeout(port, termios->c_cflag, baud); |
| 949 | |
| 950 | spin_unlock_irqrestore(&up->port.lock, flags); |
| 951 | } |
| 952 | |
| 953 | static const char *sunzilog_type(struct uart_port *port) |
| 954 | { |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 955 | return "zs"; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 956 | } |
| 957 | |
| 958 | /* We do not request/release mappings of the registers here, this |
| 959 | * happens at early serial probe time. |
| 960 | */ |
| 961 | static void sunzilog_release_port(struct uart_port *port) |
| 962 | { |
| 963 | } |
| 964 | |
| 965 | static int sunzilog_request_port(struct uart_port *port) |
| 966 | { |
| 967 | return 0; |
| 968 | } |
| 969 | |
| 970 | /* These do not need to do anything interesting either. */ |
| 971 | static void sunzilog_config_port(struct uart_port *port, int flags) |
| 972 | { |
| 973 | } |
| 974 | |
| 975 | /* We do not support letting the user mess with the divisor, IRQ, etc. */ |
| 976 | static int sunzilog_verify_port(struct uart_port *port, struct serial_struct *ser) |
| 977 | { |
| 978 | return -EINVAL; |
| 979 | } |
| 980 | |
| 981 | static struct uart_ops sunzilog_pops = { |
| 982 | .tx_empty = sunzilog_tx_empty, |
| 983 | .set_mctrl = sunzilog_set_mctrl, |
| 984 | .get_mctrl = sunzilog_get_mctrl, |
| 985 | .stop_tx = sunzilog_stop_tx, |
| 986 | .start_tx = sunzilog_start_tx, |
| 987 | .stop_rx = sunzilog_stop_rx, |
| 988 | .enable_ms = sunzilog_enable_ms, |
| 989 | .break_ctl = sunzilog_break_ctl, |
| 990 | .startup = sunzilog_startup, |
| 991 | .shutdown = sunzilog_shutdown, |
| 992 | .set_termios = sunzilog_set_termios, |
| 993 | .type = sunzilog_type, |
| 994 | .release_port = sunzilog_release_port, |
| 995 | .request_port = sunzilog_request_port, |
| 996 | .config_port = sunzilog_config_port, |
| 997 | .verify_port = sunzilog_verify_port, |
| 998 | }; |
| 999 | |
| 1000 | static struct uart_sunzilog_port *sunzilog_port_table; |
| 1001 | static struct zilog_layout __iomem **sunzilog_chip_regs; |
| 1002 | |
| 1003 | static struct uart_sunzilog_port *sunzilog_irq_chain; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1004 | |
| 1005 | static struct uart_driver sunzilog_reg = { |
| 1006 | .owner = THIS_MODULE, |
| 1007 | .driver_name = "ttyS", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1008 | .dev_name = "ttyS", |
| 1009 | .major = TTY_MAJOR, |
| 1010 | }; |
| 1011 | |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1012 | static int __init sunzilog_alloc_tables(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1013 | { |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1014 | struct uart_sunzilog_port *up; |
| 1015 | unsigned long size; |
| 1016 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1017 | |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1018 | size = NUM_CHANNELS * sizeof(struct uart_sunzilog_port); |
| 1019 | sunzilog_port_table = kzalloc(size, GFP_KERNEL); |
| 1020 | if (!sunzilog_port_table) |
| 1021 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1022 | |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1023 | for (i = 0; i < NUM_CHANNELS; i++) { |
| 1024 | up = &sunzilog_port_table[i]; |
| 1025 | |
| 1026 | spin_lock_init(&up->port.lock); |
| 1027 | |
| 1028 | if (i == 0) |
| 1029 | sunzilog_irq_chain = up; |
| 1030 | |
| 1031 | if (i < NUM_CHANNELS - 1) |
| 1032 | up->next = up + 1; |
| 1033 | else |
| 1034 | up->next = NULL; |
| 1035 | } |
| 1036 | |
| 1037 | size = NUM_SUNZILOG * sizeof(struct zilog_layout __iomem *); |
| 1038 | sunzilog_chip_regs = kzalloc(size, GFP_KERNEL); |
| 1039 | if (!sunzilog_chip_regs) { |
| 1040 | kfree(sunzilog_port_table); |
| 1041 | sunzilog_irq_chain = NULL; |
| 1042 | return -ENOMEM; |
| 1043 | } |
| 1044 | |
| 1045 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1046 | } |
| 1047 | |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1048 | static void sunzilog_free_tables(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1049 | { |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1050 | kfree(sunzilog_port_table); |
| 1051 | sunzilog_irq_chain = NULL; |
| 1052 | kfree(sunzilog_chip_regs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1053 | } |
| 1054 | |
| 1055 | #define ZS_PUT_CHAR_MAX_DELAY 2000 /* 10 ms */ |
| 1056 | |
Russell King | d358788 | 2006-03-20 20:00:09 +0000 | [diff] [blame] | 1057 | static void sunzilog_putchar(struct uart_port *port, int ch) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1058 | { |
Al Viro | 4834327 | 2006-10-10 22:44:47 +0100 | [diff] [blame] | 1059 | struct zilog_channel __iomem *channel = ZILOG_CHANNEL_FROM_PORT(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1060 | int loops = ZS_PUT_CHAR_MAX_DELAY; |
| 1061 | |
| 1062 | /* This is a timed polling loop so do not switch the explicit |
| 1063 | * udelay with ZSDELAY as that is a NOP on some platforms. -DaveM |
| 1064 | */ |
| 1065 | do { |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1066 | unsigned char val = readb(&channel->control); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1067 | if (val & Tx_BUF_EMP) { |
| 1068 | ZSDELAY(); |
| 1069 | break; |
| 1070 | } |
| 1071 | udelay(5); |
| 1072 | } while (--loops); |
| 1073 | |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1074 | writeb(ch, &channel->data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1075 | ZSDELAY(); |
| 1076 | ZS_WSYNC(channel); |
| 1077 | } |
| 1078 | |
| 1079 | #ifdef CONFIG_SERIO |
| 1080 | |
| 1081 | static DEFINE_SPINLOCK(sunzilog_serio_lock); |
| 1082 | |
| 1083 | static int sunzilog_serio_write(struct serio *serio, unsigned char ch) |
| 1084 | { |
| 1085 | struct uart_sunzilog_port *up = serio->port_data; |
| 1086 | unsigned long flags; |
| 1087 | |
| 1088 | spin_lock_irqsave(&sunzilog_serio_lock, flags); |
| 1089 | |
Russell King | d358788 | 2006-03-20 20:00:09 +0000 | [diff] [blame] | 1090 | sunzilog_putchar(&up->port, ch); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1091 | |
| 1092 | spin_unlock_irqrestore(&sunzilog_serio_lock, flags); |
| 1093 | |
| 1094 | return 0; |
| 1095 | } |
| 1096 | |
| 1097 | static int sunzilog_serio_open(struct serio *serio) |
| 1098 | { |
| 1099 | struct uart_sunzilog_port *up = serio->port_data; |
| 1100 | unsigned long flags; |
| 1101 | int ret; |
| 1102 | |
| 1103 | spin_lock_irqsave(&sunzilog_serio_lock, flags); |
| 1104 | if (!up->serio_open) { |
| 1105 | up->serio_open = 1; |
| 1106 | ret = 0; |
| 1107 | } else |
| 1108 | ret = -EBUSY; |
| 1109 | spin_unlock_irqrestore(&sunzilog_serio_lock, flags); |
| 1110 | |
| 1111 | return ret; |
| 1112 | } |
| 1113 | |
| 1114 | static void sunzilog_serio_close(struct serio *serio) |
| 1115 | { |
| 1116 | struct uart_sunzilog_port *up = serio->port_data; |
| 1117 | unsigned long flags; |
| 1118 | |
| 1119 | spin_lock_irqsave(&sunzilog_serio_lock, flags); |
| 1120 | up->serio_open = 0; |
| 1121 | spin_unlock_irqrestore(&sunzilog_serio_lock, flags); |
| 1122 | } |
| 1123 | |
| 1124 | #endif /* CONFIG_SERIO */ |
| 1125 | |
| 1126 | #ifdef CONFIG_SERIAL_SUNZILOG_CONSOLE |
| 1127 | static void |
| 1128 | sunzilog_console_write(struct console *con, const char *s, unsigned int count) |
| 1129 | { |
| 1130 | struct uart_sunzilog_port *up = &sunzilog_port_table[con->index]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1131 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1132 | |
| 1133 | spin_lock_irqsave(&up->port.lock, flags); |
Russell King | d358788 | 2006-03-20 20:00:09 +0000 | [diff] [blame] | 1134 | uart_console_write(&up->port, s, count, sunzilog_putchar); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1135 | udelay(2); |
| 1136 | spin_unlock_irqrestore(&up->port.lock, flags); |
| 1137 | } |
| 1138 | |
| 1139 | static int __init sunzilog_console_setup(struct console *con, char *options) |
| 1140 | { |
| 1141 | struct uart_sunzilog_port *up = &sunzilog_port_table[con->index]; |
| 1142 | unsigned long flags; |
| 1143 | int baud, brg; |
| 1144 | |
David S. Miller | b8b99e8 | 2006-08-23 15:53:39 -0700 | [diff] [blame] | 1145 | if (up->port.type != PORT_SUNZILOG) |
| 1146 | return -1; |
| 1147 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1148 | printk(KERN_INFO "Console: ttyS%d (SunZilog zs%d)\n", |
| 1149 | (sunzilog_reg.minor - 64) + con->index, con->index); |
| 1150 | |
| 1151 | /* Get firmware console settings. */ |
| 1152 | sunserial_console_termios(con); |
| 1153 | |
| 1154 | /* Firmware console speed is limited to 150-->38400 baud so |
| 1155 | * this hackish cflag thing is OK. |
| 1156 | */ |
| 1157 | switch (con->cflag & CBAUD) { |
| 1158 | case B150: baud = 150; break; |
| 1159 | case B300: baud = 300; break; |
| 1160 | case B600: baud = 600; break; |
| 1161 | case B1200: baud = 1200; break; |
| 1162 | case B2400: baud = 2400; break; |
| 1163 | case B4800: baud = 4800; break; |
| 1164 | default: case B9600: baud = 9600; break; |
| 1165 | case B19200: baud = 19200; break; |
| 1166 | case B38400: baud = 38400; break; |
| 1167 | }; |
| 1168 | |
| 1169 | brg = BPS_TO_BRG(baud, ZS_CLOCK / ZS_CLOCK_DIVISOR); |
| 1170 | |
| 1171 | spin_lock_irqsave(&up->port.lock, flags); |
| 1172 | |
| 1173 | up->curregs[R15] = BRKIE; |
| 1174 | sunzilog_convert_to_zs(up, con->cflag, 0, brg); |
| 1175 | |
| 1176 | sunzilog_set_mctrl(&up->port, TIOCM_DTR | TIOCM_RTS); |
| 1177 | __sunzilog_startup(up); |
| 1178 | |
| 1179 | spin_unlock_irqrestore(&up->port.lock, flags); |
| 1180 | |
| 1181 | return 0; |
| 1182 | } |
| 1183 | |
Martin Habets | eba8cef | 2006-10-10 14:44:01 -0700 | [diff] [blame] | 1184 | static struct console sunzilog_console_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1185 | .name = "ttyS", |
| 1186 | .write = sunzilog_console_write, |
| 1187 | .device = uart_console_device, |
| 1188 | .setup = sunzilog_console_setup, |
| 1189 | .flags = CON_PRINTBUFFER, |
| 1190 | .index = -1, |
| 1191 | .data = &sunzilog_reg, |
| 1192 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1193 | |
David S. Miller | 1ddb7c9 | 2006-02-13 20:09:10 -0800 | [diff] [blame] | 1194 | static inline struct console *SUNZILOG_CONSOLE(void) |
| 1195 | { |
| 1196 | int i; |
| 1197 | |
| 1198 | if (con_is_present()) |
| 1199 | return NULL; |
| 1200 | |
| 1201 | for (i = 0; i < NUM_CHANNELS; i++) { |
| 1202 | int this_minor = sunzilog_reg.minor + i; |
| 1203 | |
| 1204 | if ((this_minor - 64) == (serial_console - 1)) |
| 1205 | break; |
| 1206 | } |
| 1207 | if (i == NUM_CHANNELS) |
| 1208 | return NULL; |
| 1209 | |
Martin Habets | eba8cef | 2006-10-10 14:44:01 -0700 | [diff] [blame] | 1210 | sunzilog_console_ops.index = i; |
David S. Miller | 1ddb7c9 | 2006-02-13 20:09:10 -0800 | [diff] [blame] | 1211 | sunzilog_port_table[i].flags |= SUNZILOG_FLAG_IS_CONS; |
| 1212 | |
Martin Habets | eba8cef | 2006-10-10 14:44:01 -0700 | [diff] [blame] | 1213 | return &sunzilog_console_ops; |
David S. Miller | 1ddb7c9 | 2006-02-13 20:09:10 -0800 | [diff] [blame] | 1214 | } |
| 1215 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1216 | #else |
David S. Miller | 1ddb7c9 | 2006-02-13 20:09:10 -0800 | [diff] [blame] | 1217 | #define SUNZILOG_CONSOLE() (NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1218 | #endif |
| 1219 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1220 | static void __init sunzilog_init_kbdms(struct uart_sunzilog_port *up, int channel) |
| 1221 | { |
| 1222 | int baud, brg; |
| 1223 | |
David S. Miller | 8a84eb1 | 2006-07-19 22:55:08 -0700 | [diff] [blame] | 1224 | if (up->flags & SUNZILOG_FLAG_CONS_KEYB) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1225 | up->cflag = B1200 | CS8 | CLOCAL | CREAD; |
| 1226 | baud = 1200; |
| 1227 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1228 | up->cflag = B4800 | CS8 | CLOCAL | CREAD; |
| 1229 | baud = 4800; |
| 1230 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1231 | |
| 1232 | up->curregs[R15] = BRKIE; |
| 1233 | brg = BPS_TO_BRG(baud, ZS_CLOCK / ZS_CLOCK_DIVISOR); |
| 1234 | sunzilog_convert_to_zs(up, up->cflag, 0, brg); |
| 1235 | sunzilog_set_mctrl(&up->port, TIOCM_DTR | TIOCM_RTS); |
| 1236 | __sunzilog_startup(up); |
| 1237 | } |
| 1238 | |
| 1239 | #ifdef CONFIG_SERIO |
David S. Miller | 8a84eb1 | 2006-07-19 22:55:08 -0700 | [diff] [blame] | 1240 | static void __init sunzilog_register_serio(struct uart_sunzilog_port *up) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1241 | { |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1242 | struct serio *serio = &up->serio; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1243 | |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1244 | serio->port_data = up; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1245 | |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1246 | serio->id.type = SERIO_RS232; |
David S. Miller | 8a84eb1 | 2006-07-19 22:55:08 -0700 | [diff] [blame] | 1247 | if (up->flags & SUNZILOG_FLAG_CONS_KEYB) { |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1248 | serio->id.proto = SERIO_SUNKBD; |
| 1249 | strlcpy(serio->name, "zskbd", sizeof(serio->name)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1250 | } else { |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1251 | serio->id.proto = SERIO_SUN; |
| 1252 | serio->id.extra = 1; |
| 1253 | strlcpy(serio->name, "zsms", sizeof(serio->name)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1254 | } |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1255 | strlcpy(serio->phys, |
David S. Miller | 8a84eb1 | 2006-07-19 22:55:08 -0700 | [diff] [blame] | 1256 | ((up->flags & SUNZILOG_FLAG_CONS_KEYB) ? |
| 1257 | "zs/serio0" : "zs/serio1"), |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1258 | sizeof(serio->phys)); |
| 1259 | |
| 1260 | serio->write = sunzilog_serio_write; |
| 1261 | serio->open = sunzilog_serio_open; |
| 1262 | serio->close = sunzilog_serio_close; |
| 1263 | serio->dev.parent = up->port.dev; |
| 1264 | |
| 1265 | serio_register_port(serio); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1266 | } |
| 1267 | #endif |
| 1268 | |
David S. Miller | fbe96f9 | 2006-09-27 19:52:35 -0700 | [diff] [blame] | 1269 | static void __devinit sunzilog_init_hw(struct uart_sunzilog_port *up) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1270 | { |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1271 | struct zilog_channel __iomem *channel; |
| 1272 | unsigned long flags; |
| 1273 | int baud, brg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1274 | |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1275 | channel = ZILOG_CHANNEL_FROM_PORT(&up->port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1276 | |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1277 | spin_lock_irqsave(&up->port.lock, flags); |
| 1278 | if (ZS_IS_CHANNEL_A(up)) { |
| 1279 | write_zsreg(channel, R9, FHWRES); |
| 1280 | ZSDELAY_LONG(); |
| 1281 | (void) read_zsreg(channel, R0); |
| 1282 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1283 | |
David S. Miller | 8a84eb1 | 2006-07-19 22:55:08 -0700 | [diff] [blame] | 1284 | if (up->flags & (SUNZILOG_FLAG_CONS_KEYB | |
| 1285 | SUNZILOG_FLAG_CONS_MOUSE)) { |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1286 | sunzilog_init_kbdms(up, up->port.line); |
| 1287 | up->curregs[R9] |= (NV | MIE); |
| 1288 | write_zsreg(channel, R9, up->curregs[R9]); |
| 1289 | } else { |
| 1290 | /* Normal serial TTY. */ |
| 1291 | up->parity_mask = 0xff; |
| 1292 | up->curregs[R1] = EXT_INT_ENAB | INT_ALL_Rx | TxINT_ENAB; |
| 1293 | up->curregs[R4] = PAR_EVEN | X16CLK | SB1; |
| 1294 | up->curregs[R3] = RxENAB | Rx8; |
| 1295 | up->curregs[R5] = TxENAB | Tx8; |
| 1296 | up->curregs[R9] = NV | MIE; |
| 1297 | up->curregs[R10] = NRZ; |
| 1298 | up->curregs[R11] = TCBR | RCBR; |
| 1299 | baud = 9600; |
| 1300 | brg = BPS_TO_BRG(baud, ZS_CLOCK / ZS_CLOCK_DIVISOR); |
| 1301 | up->curregs[R12] = (brg & 0xff); |
| 1302 | up->curregs[R13] = (brg >> 8) & 0xff; |
| 1303 | up->curregs[R14] = BRSRC | BRENAB; |
| 1304 | __load_zsregs(channel, up->curregs); |
| 1305 | write_zsreg(channel, R9, up->curregs[R9]); |
| 1306 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1307 | |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1308 | spin_unlock_irqrestore(&up->port.lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1309 | |
| 1310 | #ifdef CONFIG_SERIO |
David S. Miller | 8a84eb1 | 2006-07-19 22:55:08 -0700 | [diff] [blame] | 1311 | if (up->flags & (SUNZILOG_FLAG_CONS_KEYB | |
| 1312 | SUNZILOG_FLAG_CONS_MOUSE)) |
| 1313 | sunzilog_register_serio(up); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1314 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1315 | } |
| 1316 | |
David S. Miller | 4fa97dc | 2006-06-29 15:13:40 -0700 | [diff] [blame] | 1317 | static int zilog_irq = -1; |
| 1318 | |
David S. Miller | 67e23a1 | 2006-07-17 21:07:17 -0700 | [diff] [blame] | 1319 | static int __devinit zs_probe(struct of_device *op, const struct of_device_id *match) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1320 | { |
David S. Miller | 8a84eb1 | 2006-07-19 22:55:08 -0700 | [diff] [blame] | 1321 | static int inst; |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1322 | struct uart_sunzilog_port *up; |
| 1323 | struct zilog_layout __iomem *rp; |
David S. Miller | 8a84eb1 | 2006-07-19 22:55:08 -0700 | [diff] [blame] | 1324 | int keyboard_mouse; |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1325 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1326 | |
David S. Miller | 8a84eb1 | 2006-07-19 22:55:08 -0700 | [diff] [blame] | 1327 | keyboard_mouse = 0; |
| 1328 | if (of_find_property(op->node, "keyboard", NULL)) |
| 1329 | keyboard_mouse = 1; |
| 1330 | |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1331 | sunzilog_chip_regs[inst] = of_ioremap(&op->resource[0], 0, |
| 1332 | sizeof(struct zilog_layout), |
| 1333 | "zs"); |
| 1334 | if (!sunzilog_chip_regs[inst]) |
| 1335 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1336 | |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1337 | rp = sunzilog_chip_regs[inst]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1338 | |
David S. Miller | b77d35b | 2006-07-19 21:04:04 -0700 | [diff] [blame] | 1339 | if (zilog_irq == -1) |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1340 | zilog_irq = op->irqs[0]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1341 | |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1342 | up = &sunzilog_port_table[inst * 2]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1343 | |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1344 | /* Channel A */ |
| 1345 | up[0].port.mapbase = op->resource[0].start + 0x00; |
| 1346 | up[0].port.membase = (void __iomem *) &rp->channelA; |
| 1347 | up[0].port.iotype = UPIO_MEM; |
| 1348 | up[0].port.irq = op->irqs[0]; |
| 1349 | up[0].port.uartclk = ZS_CLOCK; |
| 1350 | up[0].port.fifosize = 1; |
| 1351 | up[0].port.ops = &sunzilog_pops; |
| 1352 | up[0].port.type = PORT_SUNZILOG; |
| 1353 | up[0].port.flags = 0; |
| 1354 | up[0].port.line = (inst * 2) + 0; |
| 1355 | up[0].port.dev = &op->dev; |
| 1356 | up[0].flags |= SUNZILOG_FLAG_IS_CHANNEL_A; |
David S. Miller | 8a84eb1 | 2006-07-19 22:55:08 -0700 | [diff] [blame] | 1357 | if (keyboard_mouse) |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1358 | up[0].flags |= SUNZILOG_FLAG_CONS_KEYB; |
| 1359 | sunzilog_init_hw(&up[0]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1360 | |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1361 | /* Channel B */ |
| 1362 | up[1].port.mapbase = op->resource[0].start + 0x04; |
| 1363 | up[1].port.membase = (void __iomem *) &rp->channelB; |
| 1364 | up[1].port.iotype = UPIO_MEM; |
| 1365 | up[1].port.irq = op->irqs[0]; |
| 1366 | up[1].port.uartclk = ZS_CLOCK; |
| 1367 | up[1].port.fifosize = 1; |
| 1368 | up[1].port.ops = &sunzilog_pops; |
| 1369 | up[1].port.type = PORT_SUNZILOG; |
| 1370 | up[1].port.flags = 0; |
| 1371 | up[1].port.line = (inst * 2) + 1; |
| 1372 | up[1].port.dev = &op->dev; |
| 1373 | up[1].flags |= 0; |
David S. Miller | 8a84eb1 | 2006-07-19 22:55:08 -0700 | [diff] [blame] | 1374 | if (keyboard_mouse) |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1375 | up[1].flags |= SUNZILOG_FLAG_CONS_MOUSE; |
| 1376 | sunzilog_init_hw(&up[1]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1377 | |
David S. Miller | 8a84eb1 | 2006-07-19 22:55:08 -0700 | [diff] [blame] | 1378 | if (!keyboard_mouse) { |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1379 | err = uart_add_one_port(&sunzilog_reg, &up[0].port); |
| 1380 | if (err) { |
David S. Miller | e3a411a | 2006-12-28 21:01:32 -0800 | [diff] [blame] | 1381 | of_iounmap(&op->resource[0], |
| 1382 | rp, sizeof(struct zilog_layout)); |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1383 | return err; |
| 1384 | } |
| 1385 | err = uart_add_one_port(&sunzilog_reg, &up[1].port); |
| 1386 | if (err) { |
| 1387 | uart_remove_one_port(&sunzilog_reg, &up[0].port); |
David S. Miller | e3a411a | 2006-12-28 21:01:32 -0800 | [diff] [blame] | 1388 | of_iounmap(&op->resource[0], |
| 1389 | rp, sizeof(struct zilog_layout)); |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1390 | return err; |
| 1391 | } |
David S. Miller | 8a84eb1 | 2006-07-19 22:55:08 -0700 | [diff] [blame] | 1392 | } else { |
| 1393 | printk(KERN_INFO "%s: Keyboard at MMIO %lx (irq = %d) " |
| 1394 | "is a zs\n", |
| 1395 | op->dev.bus_id, up[0].port.mapbase, op->irqs[0]); |
| 1396 | printk(KERN_INFO "%s: Mouse at MMIO %lx (irq = %d) " |
| 1397 | "is a zs\n", |
| 1398 | op->dev.bus_id, up[1].port.mapbase, op->irqs[0]); |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1399 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1400 | |
David S. Miller | 67e23a1 | 2006-07-17 21:07:17 -0700 | [diff] [blame] | 1401 | dev_set_drvdata(&op->dev, &up[0]); |
David S. Miller | 4fa97dc | 2006-06-29 15:13:40 -0700 | [diff] [blame] | 1402 | |
David S. Miller | 8a84eb1 | 2006-07-19 22:55:08 -0700 | [diff] [blame] | 1403 | inst++; |
| 1404 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1405 | return 0; |
| 1406 | } |
| 1407 | |
David S. Miller | 4fa97dc | 2006-06-29 15:13:40 -0700 | [diff] [blame] | 1408 | static void __devexit zs_remove_one(struct uart_sunzilog_port *up) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1409 | { |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1410 | if (ZS_IS_KEYB(up) || ZS_IS_MOUSE(up)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1411 | #ifdef CONFIG_SERIO |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1412 | serio_unregister_port(&up->serio); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1413 | #endif |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1414 | } else |
| 1415 | uart_remove_one_port(&sunzilog_reg, &up->port); |
David S. Miller | 4fa97dc | 2006-06-29 15:13:40 -0700 | [diff] [blame] | 1416 | } |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1417 | |
David S. Miller | e3a411a | 2006-12-28 21:01:32 -0800 | [diff] [blame] | 1418 | static int __devexit zs_remove(struct of_device *op) |
David S. Miller | 4fa97dc | 2006-06-29 15:13:40 -0700 | [diff] [blame] | 1419 | { |
David S. Miller | e3a411a | 2006-12-28 21:01:32 -0800 | [diff] [blame] | 1420 | struct uart_sunzilog_port *up = dev_get_drvdata(&op->dev); |
David S. Miller | 4fa97dc | 2006-06-29 15:13:40 -0700 | [diff] [blame] | 1421 | struct zilog_layout __iomem *regs; |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1422 | |
David S. Miller | 4fa97dc | 2006-06-29 15:13:40 -0700 | [diff] [blame] | 1423 | zs_remove_one(&up[0]); |
| 1424 | zs_remove_one(&up[1]); |
| 1425 | |
| 1426 | regs = sunzilog_chip_regs[up[0].port.line / 2]; |
David S. Miller | e3a411a | 2006-12-28 21:01:32 -0800 | [diff] [blame] | 1427 | of_iounmap(&op->resource[0], regs, sizeof(struct zilog_layout)); |
David S. Miller | 4fa97dc | 2006-06-29 15:13:40 -0700 | [diff] [blame] | 1428 | |
David S. Miller | e3a411a | 2006-12-28 21:01:32 -0800 | [diff] [blame] | 1429 | dev_set_drvdata(&op->dev, NULL); |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1430 | |
| 1431 | return 0; |
| 1432 | } |
| 1433 | |
| 1434 | static struct of_device_id zs_match[] = { |
| 1435 | { |
| 1436 | .name = "zs", |
| 1437 | }, |
| 1438 | {}, |
| 1439 | }; |
| 1440 | MODULE_DEVICE_TABLE(of, zs_match); |
| 1441 | |
| 1442 | static struct of_platform_driver zs_driver = { |
| 1443 | .name = "zs", |
| 1444 | .match_table = zs_match, |
| 1445 | .probe = zs_probe, |
| 1446 | .remove = __devexit_p(zs_remove), |
| 1447 | }; |
| 1448 | |
| 1449 | static int __init sunzilog_init(void) |
| 1450 | { |
| 1451 | struct device_node *dp; |
David S. Miller | 67e23a1 | 2006-07-17 21:07:17 -0700 | [diff] [blame] | 1452 | int err, uart_count; |
David S. Miller | 8a84eb1 | 2006-07-19 22:55:08 -0700 | [diff] [blame] | 1453 | int num_keybms; |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1454 | |
| 1455 | NUM_SUNZILOG = 0; |
David S. Miller | 8a84eb1 | 2006-07-19 22:55:08 -0700 | [diff] [blame] | 1456 | num_keybms = 0; |
| 1457 | for_each_node_by_name(dp, "zs") { |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1458 | NUM_SUNZILOG++; |
David S. Miller | 8a84eb1 | 2006-07-19 22:55:08 -0700 | [diff] [blame] | 1459 | if (of_find_property(dp, "keyboard", NULL)) |
| 1460 | num_keybms++; |
| 1461 | } |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1462 | |
David S. Miller | 67e23a1 | 2006-07-17 21:07:17 -0700 | [diff] [blame] | 1463 | uart_count = 0; |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1464 | if (NUM_SUNZILOG) { |
| 1465 | int uart_count; |
| 1466 | |
| 1467 | err = sunzilog_alloc_tables(); |
| 1468 | if (err) |
David S. Miller | 67e23a1 | 2006-07-17 21:07:17 -0700 | [diff] [blame] | 1469 | goto out; |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1470 | |
David S. Miller | 8a84eb1 | 2006-07-19 22:55:08 -0700 | [diff] [blame] | 1471 | uart_count = (NUM_SUNZILOG * 2) - (2 * num_keybms); |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1472 | |
| 1473 | sunzilog_reg.nr = uart_count; |
| 1474 | sunzilog_reg.minor = sunserial_current_minor; |
| 1475 | err = uart_register_driver(&sunzilog_reg); |
David S. Miller | 67e23a1 | 2006-07-17 21:07:17 -0700 | [diff] [blame] | 1476 | if (err) |
| 1477 | goto out_free_tables; |
| 1478 | |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1479 | sunzilog_reg.tty_driver->name_base = sunzilog_reg.minor - 64; |
| 1480 | sunzilog_reg.cons = SUNZILOG_CONSOLE(); |
| 1481 | |
| 1482 | sunserial_current_minor += uart_count; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1483 | } |
| 1484 | |
David S. Miller | 67e23a1 | 2006-07-17 21:07:17 -0700 | [diff] [blame] | 1485 | err = of_register_driver(&zs_driver, &of_bus_type); |
| 1486 | if (err) |
| 1487 | goto out_unregister_uart; |
| 1488 | |
| 1489 | if (zilog_irq != -1) { |
| 1490 | err = request_irq(zilog_irq, sunzilog_interrupt, IRQF_SHARED, |
| 1491 | "zs", sunzilog_irq_chain); |
| 1492 | if (err) |
| 1493 | goto out_unregister_driver; |
| 1494 | } |
| 1495 | |
| 1496 | out: |
| 1497 | return err; |
| 1498 | |
| 1499 | out_unregister_driver: |
| 1500 | of_unregister_driver(&zs_driver); |
| 1501 | |
| 1502 | out_unregister_uart: |
| 1503 | if (NUM_SUNZILOG) { |
| 1504 | uart_unregister_driver(&sunzilog_reg); |
| 1505 | sunzilog_reg.cons = NULL; |
| 1506 | } |
| 1507 | |
| 1508 | out_free_tables: |
| 1509 | sunzilog_free_tables(); |
| 1510 | goto out; |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1511 | } |
| 1512 | |
| 1513 | static void __exit sunzilog_exit(void) |
| 1514 | { |
| 1515 | of_unregister_driver(&zs_driver); |
| 1516 | |
David S. Miller | 4fa97dc | 2006-06-29 15:13:40 -0700 | [diff] [blame] | 1517 | if (zilog_irq != -1) { |
| 1518 | free_irq(zilog_irq, sunzilog_irq_chain); |
| 1519 | zilog_irq = -1; |
| 1520 | } |
| 1521 | |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1522 | if (NUM_SUNZILOG) { |
| 1523 | uart_unregister_driver(&sunzilog_reg); |
| 1524 | sunzilog_free_tables(); |
| 1525 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1526 | } |
| 1527 | |
| 1528 | module_init(sunzilog_init); |
| 1529 | module_exit(sunzilog_exit); |
| 1530 | |
| 1531 | MODULE_AUTHOR("David S. Miller"); |
| 1532 | MODULE_DESCRIPTION("Sun Zilog serial port driver"); |
David S. Miller | 9efc371 | 2006-06-29 15:14:17 -0700 | [diff] [blame] | 1533 | MODULE_VERSION("2.0"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1534 | MODULE_LICENSE("GPL"); |