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 | f3c681c | 2007-07-15 23:53:32 -0700 | [diff] [blame] | 12 | * Copyright (C) 2002, 2006, 2007 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> |
Stephen Rothwell | c6ed413 | 2008-08-11 14:30:53 -0700 | [diff] [blame] | 35 | #include <linux/of_device.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | |
| 37 | #include <asm/io.h> |
| 38 | #include <asm/irq.h> |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 39 | #include <asm/prom.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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | #define ZS_CLOCK 4915200 /* Zilog input clock rate. */ |
| 67 | #define ZS_CLOCK_DIVISOR 16 /* Divisor this driver uses. */ |
| 68 | |
| 69 | /* |
| 70 | * We wrap our port structure around the generic uart_port. |
| 71 | */ |
| 72 | struct uart_sunzilog_port { |
| 73 | struct uart_port port; |
| 74 | |
| 75 | /* IRQ servicing chain. */ |
| 76 | struct uart_sunzilog_port *next; |
| 77 | |
| 78 | /* Current values of Zilog write registers. */ |
| 79 | unsigned char curregs[NUM_ZSREGS]; |
| 80 | |
| 81 | unsigned int flags; |
| 82 | #define SUNZILOG_FLAG_CONS_KEYB 0x00000001 |
| 83 | #define SUNZILOG_FLAG_CONS_MOUSE 0x00000002 |
| 84 | #define SUNZILOG_FLAG_IS_CONS 0x00000004 |
| 85 | #define SUNZILOG_FLAG_IS_KGDB 0x00000008 |
| 86 | #define SUNZILOG_FLAG_MODEM_STATUS 0x00000010 |
| 87 | #define SUNZILOG_FLAG_IS_CHANNEL_A 0x00000020 |
| 88 | #define SUNZILOG_FLAG_REGS_HELD 0x00000040 |
| 89 | #define SUNZILOG_FLAG_TX_STOPPED 0x00000080 |
| 90 | #define SUNZILOG_FLAG_TX_ACTIVE 0x00000100 |
Mark Fortescue | 7cc5c85 | 2007-05-09 13:49:04 -0700 | [diff] [blame] | 91 | #define SUNZILOG_FLAG_ESCC 0x00000200 |
| 92 | #define SUNZILOG_FLAG_ISR_HANDLER 0x00000400 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | |
| 94 | unsigned int cflag; |
| 95 | |
| 96 | unsigned char parity_mask; |
| 97 | unsigned char prev_status; |
| 98 | |
| 99 | #ifdef CONFIG_SERIO |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 100 | struct serio serio; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | int serio_open; |
| 102 | #endif |
| 103 | }; |
| 104 | |
Jason Wessel | 6d45a1a | 2010-05-20 21:04:23 -0500 | [diff] [blame] | 105 | static void sunzilog_putchar(struct uart_port *port, int ch); |
| 106 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | */ |
Mark Fortescue | 7cc5c85 | 2007-05-09 13:49:04 -0700 | [diff] [blame] | 177 | static int __load_zsregs(struct zilog_channel __iomem *channel, unsigned char *regs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | { |
| 179 | int i; |
Mark Fortescue | 7cc5c85 | 2007-05-09 13:49:04 -0700 | [diff] [blame] | 180 | int escc; |
| 181 | unsigned char r15; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | |
| 183 | /* Let pending transmits finish. */ |
| 184 | for (i = 0; i < 1000; i++) { |
| 185 | unsigned char stat = read_zsreg(channel, R1); |
| 186 | if (stat & ALL_SNT) |
| 187 | break; |
| 188 | udelay(100); |
| 189 | } |
| 190 | |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 191 | writeb(ERR_RES, &channel->control); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | ZSDELAY(); |
| 193 | ZS_WSYNC(channel); |
| 194 | |
| 195 | sunzilog_clear_fifo(channel); |
| 196 | |
| 197 | /* Disable all interrupts. */ |
| 198 | write_zsreg(channel, R1, |
| 199 | regs[R1] & ~(RxINT_MASK | TxINT_ENAB | EXT_INT_ENAB)); |
| 200 | |
| 201 | /* Set parity, sync config, stop bits, and clock divisor. */ |
| 202 | write_zsreg(channel, R4, regs[R4]); |
| 203 | |
| 204 | /* Set misc. TX/RX control bits. */ |
| 205 | write_zsreg(channel, R10, regs[R10]); |
| 206 | |
| 207 | /* Set TX/RX controls sans the enable bits. */ |
| 208 | write_zsreg(channel, R3, regs[R3] & ~RxENAB); |
| 209 | write_zsreg(channel, R5, regs[R5] & ~TxENAB); |
| 210 | |
| 211 | /* Synchronous mode config. */ |
| 212 | write_zsreg(channel, R6, regs[R6]); |
| 213 | write_zsreg(channel, R7, regs[R7]); |
| 214 | |
| 215 | /* Don't mess with the interrupt vector (R2, unused by us) and |
| 216 | * master interrupt control (R9). We make sure this is setup |
| 217 | * properly at probe time then never touch it again. |
| 218 | */ |
| 219 | |
| 220 | /* Disable baud generator. */ |
| 221 | write_zsreg(channel, R14, regs[R14] & ~BRENAB); |
| 222 | |
| 223 | /* Clock mode control. */ |
| 224 | write_zsreg(channel, R11, regs[R11]); |
| 225 | |
| 226 | /* Lower and upper byte of baud rate generator divisor. */ |
| 227 | write_zsreg(channel, R12, regs[R12]); |
| 228 | write_zsreg(channel, R13, regs[R13]); |
| 229 | |
| 230 | /* Now rewrite R14, with BRENAB (if set). */ |
| 231 | write_zsreg(channel, R14, regs[R14]); |
| 232 | |
| 233 | /* External status interrupt control. */ |
Mark Fortescue | 7cc5c85 | 2007-05-09 13:49:04 -0700 | [diff] [blame] | 234 | write_zsreg(channel, R15, (regs[R15] | WR7pEN) & ~FIFOEN); |
| 235 | |
| 236 | /* ESCC Extension Register */ |
| 237 | r15 = read_zsreg(channel, R15); |
| 238 | if (r15 & 0x01) { |
| 239 | write_zsreg(channel, R7, regs[R7p]); |
| 240 | |
| 241 | /* External status interrupt and FIFO control. */ |
| 242 | write_zsreg(channel, R15, regs[R15] & ~WR7pEN); |
| 243 | escc = 1; |
| 244 | } else { |
| 245 | /* Clear FIFO bit case it is an issue */ |
| 246 | regs[R15] &= ~FIFOEN; |
| 247 | escc = 0; |
| 248 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 249 | |
| 250 | /* Reset external status interrupts. */ |
Mark Fortescue | 7cc5c85 | 2007-05-09 13:49:04 -0700 | [diff] [blame] | 251 | write_zsreg(channel, R0, RES_EXT_INT); /* First Latch */ |
| 252 | write_zsreg(channel, R0, RES_EXT_INT); /* Second Latch */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | |
| 254 | /* Rewrite R3/R5, this time without enables masked. */ |
| 255 | write_zsreg(channel, R3, regs[R3]); |
| 256 | write_zsreg(channel, R5, regs[R5]); |
| 257 | |
| 258 | /* Rewrite R1, this time without IRQ enabled masked. */ |
| 259 | write_zsreg(channel, R1, regs[R1]); |
Mark Fortescue | 7cc5c85 | 2007-05-09 13:49:04 -0700 | [diff] [blame] | 260 | |
| 261 | return escc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | } |
| 263 | |
| 264 | /* Reprogram the Zilog channel HW registers with the copies found in the |
| 265 | * software state struct. If the transmitter is busy, we defer this update |
| 266 | * until the next TX complete interrupt. Else, we do it right now. |
| 267 | * |
| 268 | * The UART port lock must be held and local interrupts disabled. |
| 269 | */ |
| 270 | static void sunzilog_maybe_update_regs(struct uart_sunzilog_port *up, |
| 271 | struct zilog_channel __iomem *channel) |
| 272 | { |
| 273 | if (!ZS_REGS_HELD(up)) { |
| 274 | if (ZS_TX_ACTIVE(up)) { |
| 275 | up->flags |= SUNZILOG_FLAG_REGS_HELD; |
| 276 | } else { |
| 277 | __load_zsregs(channel, up->curregs); |
| 278 | } |
| 279 | } |
| 280 | } |
| 281 | |
| 282 | static void sunzilog_change_mouse_baud(struct uart_sunzilog_port *up) |
| 283 | { |
| 284 | unsigned int cur_cflag = up->cflag; |
| 285 | int brg, new_baud; |
| 286 | |
| 287 | up->cflag &= ~CBAUD; |
| 288 | up->cflag |= suncore_mouse_baud_cflag_next(cur_cflag, &new_baud); |
| 289 | |
| 290 | brg = BPS_TO_BRG(new_baud, ZS_CLOCK / ZS_CLOCK_DIVISOR); |
| 291 | up->curregs[R12] = (brg & 0xff); |
| 292 | up->curregs[R13] = (brg >> 8) & 0xff; |
| 293 | sunzilog_maybe_update_regs(up, ZILOG_CHANNEL_FROM_PORT(&up->port)); |
| 294 | } |
| 295 | |
| 296 | static void sunzilog_kbdms_receive_chars(struct uart_sunzilog_port *up, |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 297 | unsigned char ch, int is_break) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 298 | { |
| 299 | if (ZS_IS_KEYB(up)) { |
| 300 | /* Stop-A is handled by drivers/char/keyboard.c now. */ |
| 301 | #ifdef CONFIG_SERIO |
| 302 | if (up->serio_open) |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 303 | serio_interrupt(&up->serio, ch, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | #endif |
| 305 | } else if (ZS_IS_MOUSE(up)) { |
| 306 | int ret = suncore_mouse_baud_detection(ch, is_break); |
| 307 | |
| 308 | switch (ret) { |
| 309 | case 2: |
| 310 | sunzilog_change_mouse_baud(up); |
| 311 | /* fallthru */ |
| 312 | case 1: |
| 313 | break; |
| 314 | |
| 315 | case 0: |
| 316 | #ifdef CONFIG_SERIO |
| 317 | if (up->serio_open) |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 318 | serio_interrupt(&up->serio, ch, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 319 | #endif |
| 320 | break; |
| 321 | }; |
| 322 | } |
| 323 | } |
| 324 | |
| 325 | static struct tty_struct * |
| 326 | sunzilog_receive_chars(struct uart_sunzilog_port *up, |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 327 | struct zilog_channel __iomem *channel) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 328 | { |
| 329 | struct tty_struct *tty; |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 330 | unsigned char ch, r1, flag; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 331 | |
| 332 | tty = NULL; |
Alan Cox | ebd2c8f | 2009-09-19 13:13:28 -0700 | [diff] [blame] | 333 | if (up->port.state != NULL && /* Unopened serial console */ |
| 334 | up->port.state->port.tty != NULL) /* Keyboard || mouse */ |
| 335 | tty = up->port.state->port.tty; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | |
| 337 | for (;;) { |
| 338 | |
| 339 | r1 = read_zsreg(channel, R1); |
| 340 | if (r1 & (PAR_ERR | Rx_OVR | CRC_ERR)) { |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 341 | writeb(ERR_RES, &channel->control); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | ZSDELAY(); |
| 343 | ZS_WSYNC(channel); |
| 344 | } |
| 345 | |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 346 | ch = readb(&channel->control); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | ZSDELAY(); |
| 348 | |
| 349 | /* This funny hack depends upon BRK_ABRT not interfering |
| 350 | * with the other bits we care about in R1. |
| 351 | */ |
| 352 | if (ch & BRK_ABRT) |
| 353 | r1 |= BRK_ABRT; |
| 354 | |
| 355 | if (!(ch & Rx_CH_AV)) |
| 356 | break; |
| 357 | |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 358 | ch = readb(&channel->data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | ZSDELAY(); |
| 360 | |
| 361 | ch &= up->parity_mask; |
| 362 | |
| 363 | if (unlikely(ZS_IS_KEYB(up)) || unlikely(ZS_IS_MOUSE(up))) { |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 364 | sunzilog_kbdms_receive_chars(up, ch, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 365 | continue; |
| 366 | } |
| 367 | |
| 368 | if (tty == NULL) { |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 369 | uart_handle_sysrq_char(&up->port, ch); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 370 | continue; |
| 371 | } |
| 372 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 373 | /* A real serial line, record the character and status. */ |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 374 | flag = TTY_NORMAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 375 | up->port.icount.rx++; |
| 376 | if (r1 & (BRK_ABRT | PAR_ERR | Rx_OVR | CRC_ERR)) { |
| 377 | if (r1 & BRK_ABRT) { |
| 378 | r1 &= ~(PAR_ERR | CRC_ERR); |
| 379 | up->port.icount.brk++; |
| 380 | if (uart_handle_break(&up->port)) |
| 381 | continue; |
| 382 | } |
| 383 | else if (r1 & PAR_ERR) |
| 384 | up->port.icount.parity++; |
| 385 | else if (r1 & CRC_ERR) |
| 386 | up->port.icount.frame++; |
| 387 | if (r1 & Rx_OVR) |
| 388 | up->port.icount.overrun++; |
| 389 | r1 &= up->port.read_status_mask; |
| 390 | if (r1 & BRK_ABRT) |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 391 | flag = TTY_BREAK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 392 | else if (r1 & PAR_ERR) |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 393 | flag = TTY_PARITY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | else if (r1 & CRC_ERR) |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 395 | flag = TTY_FRAME; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 396 | } |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 397 | if (uart_handle_sysrq_char(&up->port, ch)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 398 | continue; |
| 399 | |
| 400 | if (up->port.ignore_status_mask == 0xff || |
| 401 | (r1 & up->port.ignore_status_mask) == 0) { |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 402 | tty_insert_flip_char(tty, ch, flag); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 403 | } |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 404 | if (r1 & Rx_OVR) |
| 405 | tty_insert_flip_char(tty, 0, TTY_OVERRUN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 406 | } |
| 407 | |
| 408 | return tty; |
| 409 | } |
| 410 | |
| 411 | static void sunzilog_status_handle(struct uart_sunzilog_port *up, |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 412 | struct zilog_channel __iomem *channel) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 413 | { |
| 414 | unsigned char status; |
| 415 | |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 416 | status = readb(&channel->control); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 417 | ZSDELAY(); |
| 418 | |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 419 | writeb(RES_EXT_INT, &channel->control); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 420 | ZSDELAY(); |
| 421 | ZS_WSYNC(channel); |
| 422 | |
| 423 | if (status & BRK_ABRT) { |
| 424 | if (ZS_IS_MOUSE(up)) |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 425 | sunzilog_kbdms_receive_chars(up, 0, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 426 | if (ZS_IS_CONS(up)) { |
| 427 | /* Wait for BREAK to deassert to avoid potentially |
| 428 | * confusing the PROM. |
| 429 | */ |
| 430 | while (1) { |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 431 | status = readb(&channel->control); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 432 | ZSDELAY(); |
| 433 | if (!(status & BRK_ABRT)) |
| 434 | break; |
| 435 | } |
| 436 | sun_do_break(); |
| 437 | return; |
| 438 | } |
| 439 | } |
| 440 | |
| 441 | if (ZS_WANTS_MODEM_STATUS(up)) { |
| 442 | if (status & SYNC) |
| 443 | up->port.icount.dsr++; |
| 444 | |
| 445 | /* The Zilog just gives us an interrupt when DCD/CTS/etc. change. |
| 446 | * But it does not tell us which bit has changed, we have to keep |
| 447 | * track of this ourselves. |
| 448 | */ |
| 449 | if ((status ^ up->prev_status) ^ DCD) |
| 450 | uart_handle_dcd_change(&up->port, |
| 451 | (status & DCD)); |
| 452 | if ((status ^ up->prev_status) ^ CTS) |
| 453 | uart_handle_cts_change(&up->port, |
| 454 | (status & CTS)); |
| 455 | |
Alan Cox | bdc04e3 | 2009-09-19 13:13:31 -0700 | [diff] [blame] | 456 | wake_up_interruptible(&up->port.state->port.delta_msr_wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | } |
| 458 | |
| 459 | up->prev_status = status; |
| 460 | } |
| 461 | |
| 462 | static void sunzilog_transmit_chars(struct uart_sunzilog_port *up, |
| 463 | struct zilog_channel __iomem *channel) |
| 464 | { |
| 465 | struct circ_buf *xmit; |
| 466 | |
| 467 | if (ZS_IS_CONS(up)) { |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 468 | unsigned char status = readb(&channel->control); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | ZSDELAY(); |
| 470 | |
| 471 | /* TX still busy? Just wait for the next TX done interrupt. |
| 472 | * |
| 473 | * It can occur because of how we do serial console writes. It would |
| 474 | * be nice to transmit console writes just like we normally would for |
| 475 | * a TTY line. (ie. buffered and TX interrupt driven). That is not |
| 476 | * easy because console writes cannot sleep. One solution might be |
| 477 | * to poll on enough port->xmit space becomming free. -DaveM |
| 478 | */ |
| 479 | if (!(status & Tx_BUF_EMP)) |
| 480 | return; |
| 481 | } |
| 482 | |
| 483 | up->flags &= ~SUNZILOG_FLAG_TX_ACTIVE; |
| 484 | |
| 485 | if (ZS_REGS_HELD(up)) { |
| 486 | __load_zsregs(channel, up->curregs); |
| 487 | up->flags &= ~SUNZILOG_FLAG_REGS_HELD; |
| 488 | } |
| 489 | |
| 490 | if (ZS_TX_STOPPED(up)) { |
| 491 | up->flags &= ~SUNZILOG_FLAG_TX_STOPPED; |
| 492 | goto ack_tx_int; |
| 493 | } |
| 494 | |
| 495 | if (up->port.x_char) { |
| 496 | up->flags |= SUNZILOG_FLAG_TX_ACTIVE; |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 497 | writeb(up->port.x_char, &channel->data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 498 | ZSDELAY(); |
| 499 | ZS_WSYNC(channel); |
| 500 | |
| 501 | up->port.icount.tx++; |
| 502 | up->port.x_char = 0; |
| 503 | return; |
| 504 | } |
| 505 | |
Alan Cox | ebd2c8f | 2009-09-19 13:13:28 -0700 | [diff] [blame] | 506 | if (up->port.state == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 507 | goto ack_tx_int; |
Alan Cox | ebd2c8f | 2009-09-19 13:13:28 -0700 | [diff] [blame] | 508 | xmit = &up->port.state->xmit; |
David S. Miller | b8df110 | 2005-10-10 20:43:22 -0700 | [diff] [blame] | 509 | if (uart_circ_empty(xmit)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 510 | goto ack_tx_int; |
David S. Miller | b8df110 | 2005-10-10 20:43:22 -0700 | [diff] [blame] | 511 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 512 | if (uart_tx_stopped(&up->port)) |
| 513 | goto ack_tx_int; |
| 514 | |
| 515 | up->flags |= SUNZILOG_FLAG_TX_ACTIVE; |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 516 | writeb(xmit->buf[xmit->tail], &channel->data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 517 | ZSDELAY(); |
| 518 | ZS_WSYNC(channel); |
| 519 | |
| 520 | xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); |
| 521 | up->port.icount.tx++; |
| 522 | |
| 523 | if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) |
| 524 | uart_write_wakeup(&up->port); |
| 525 | |
| 526 | return; |
| 527 | |
| 528 | ack_tx_int: |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 529 | writeb(RES_Tx_P, &channel->control); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 530 | ZSDELAY(); |
| 531 | ZS_WSYNC(channel); |
| 532 | } |
| 533 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 534 | static irqreturn_t sunzilog_interrupt(int irq, void *dev_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 535 | { |
| 536 | struct uart_sunzilog_port *up = dev_id; |
| 537 | |
| 538 | while (up) { |
| 539 | struct zilog_channel __iomem *channel |
| 540 | = ZILOG_CHANNEL_FROM_PORT(&up->port); |
| 541 | struct tty_struct *tty; |
| 542 | unsigned char r3; |
| 543 | |
| 544 | spin_lock(&up->port.lock); |
| 545 | r3 = read_zsreg(channel, R3); |
| 546 | |
| 547 | /* Channel A */ |
| 548 | tty = NULL; |
| 549 | if (r3 & (CHAEXT | CHATxIP | CHARxIP)) { |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 550 | writeb(RES_H_IUS, &channel->control); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 551 | ZSDELAY(); |
| 552 | ZS_WSYNC(channel); |
| 553 | |
| 554 | if (r3 & CHARxIP) |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 555 | tty = sunzilog_receive_chars(up, channel); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 556 | if (r3 & CHAEXT) |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 557 | sunzilog_status_handle(up, channel); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 558 | if (r3 & CHATxIP) |
| 559 | sunzilog_transmit_chars(up, channel); |
| 560 | } |
| 561 | spin_unlock(&up->port.lock); |
| 562 | |
| 563 | if (tty) |
| 564 | tty_flip_buffer_push(tty); |
| 565 | |
| 566 | /* Channel B */ |
| 567 | up = up->next; |
| 568 | channel = ZILOG_CHANNEL_FROM_PORT(&up->port); |
| 569 | |
| 570 | spin_lock(&up->port.lock); |
| 571 | tty = NULL; |
| 572 | if (r3 & (CHBEXT | CHBTxIP | CHBRxIP)) { |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 573 | writeb(RES_H_IUS, &channel->control); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 574 | ZSDELAY(); |
| 575 | ZS_WSYNC(channel); |
| 576 | |
| 577 | if (r3 & CHBRxIP) |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 578 | tty = sunzilog_receive_chars(up, channel); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 579 | if (r3 & CHBEXT) |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 580 | sunzilog_status_handle(up, channel); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 581 | if (r3 & CHBTxIP) |
| 582 | sunzilog_transmit_chars(up, channel); |
| 583 | } |
| 584 | spin_unlock(&up->port.lock); |
| 585 | |
| 586 | if (tty) |
| 587 | tty_flip_buffer_push(tty); |
| 588 | |
| 589 | up = up->next; |
| 590 | } |
| 591 | |
| 592 | return IRQ_HANDLED; |
| 593 | } |
| 594 | |
| 595 | /* A convenient way to quickly get R0 status. The caller must _not_ hold the |
| 596 | * port lock, it is acquired here. |
| 597 | */ |
| 598 | static __inline__ unsigned char sunzilog_read_channel_status(struct uart_port *port) |
| 599 | { |
| 600 | struct zilog_channel __iomem *channel; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 601 | unsigned char status; |
| 602 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 603 | channel = ZILOG_CHANNEL_FROM_PORT(port); |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 604 | status = readb(&channel->control); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 605 | ZSDELAY(); |
| 606 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 607 | return status; |
| 608 | } |
| 609 | |
| 610 | /* The port lock is not held. */ |
| 611 | static unsigned int sunzilog_tx_empty(struct uart_port *port) |
| 612 | { |
Russell King | c5f4644 | 2005-06-29 09:42:38 +0100 | [diff] [blame] | 613 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 614 | unsigned char status; |
| 615 | unsigned int ret; |
| 616 | |
Russell King | c5f4644 | 2005-06-29 09:42:38 +0100 | [diff] [blame] | 617 | spin_lock_irqsave(&port->lock, flags); |
| 618 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 619 | status = sunzilog_read_channel_status(port); |
Russell King | c5f4644 | 2005-06-29 09:42:38 +0100 | [diff] [blame] | 620 | |
| 621 | spin_unlock_irqrestore(&port->lock, flags); |
| 622 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 623 | if (status & Tx_BUF_EMP) |
| 624 | ret = TIOCSER_TEMT; |
| 625 | else |
| 626 | ret = 0; |
| 627 | |
| 628 | return ret; |
| 629 | } |
| 630 | |
Russell King | c5f4644 | 2005-06-29 09:42:38 +0100 | [diff] [blame] | 631 | /* The port lock is held and interrupts are disabled. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 632 | static unsigned int sunzilog_get_mctrl(struct uart_port *port) |
| 633 | { |
| 634 | unsigned char status; |
| 635 | unsigned int ret; |
| 636 | |
| 637 | status = sunzilog_read_channel_status(port); |
| 638 | |
| 639 | ret = 0; |
| 640 | if (status & DCD) |
| 641 | ret |= TIOCM_CAR; |
| 642 | if (status & SYNC) |
| 643 | ret |= TIOCM_DSR; |
| 644 | if (status & CTS) |
| 645 | ret |= TIOCM_CTS; |
| 646 | |
| 647 | return ret; |
| 648 | } |
| 649 | |
| 650 | /* The port lock is held and interrupts are disabled. */ |
| 651 | static void sunzilog_set_mctrl(struct uart_port *port, unsigned int mctrl) |
| 652 | { |
| 653 | struct uart_sunzilog_port *up = (struct uart_sunzilog_port *) port; |
| 654 | struct zilog_channel __iomem *channel = ZILOG_CHANNEL_FROM_PORT(port); |
| 655 | unsigned char set_bits, clear_bits; |
| 656 | |
| 657 | set_bits = clear_bits = 0; |
| 658 | |
| 659 | if (mctrl & TIOCM_RTS) |
| 660 | set_bits |= RTS; |
| 661 | else |
| 662 | clear_bits |= RTS; |
| 663 | if (mctrl & TIOCM_DTR) |
| 664 | set_bits |= DTR; |
| 665 | else |
| 666 | clear_bits |= DTR; |
| 667 | |
| 668 | /* NOTE: Not subject to 'transmitter active' rule. */ |
| 669 | up->curregs[R5] |= set_bits; |
| 670 | up->curregs[R5] &= ~clear_bits; |
| 671 | write_zsreg(channel, R5, up->curregs[R5]); |
| 672 | } |
| 673 | |
| 674 | /* The port lock is held and interrupts are disabled. */ |
Russell King | b129a8c | 2005-08-31 10:12:14 +0100 | [diff] [blame] | 675 | static void sunzilog_stop_tx(struct uart_port *port) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 676 | { |
| 677 | struct uart_sunzilog_port *up = (struct uart_sunzilog_port *) port; |
| 678 | |
| 679 | up->flags |= SUNZILOG_FLAG_TX_STOPPED; |
| 680 | } |
| 681 | |
| 682 | /* The port lock is held and interrupts are disabled. */ |
Russell King | b129a8c | 2005-08-31 10:12:14 +0100 | [diff] [blame] | 683 | static void sunzilog_start_tx(struct uart_port *port) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 684 | { |
| 685 | struct uart_sunzilog_port *up = (struct uart_sunzilog_port *) port; |
| 686 | struct zilog_channel __iomem *channel = ZILOG_CHANNEL_FROM_PORT(port); |
| 687 | unsigned char status; |
| 688 | |
| 689 | up->flags |= SUNZILOG_FLAG_TX_ACTIVE; |
| 690 | up->flags &= ~SUNZILOG_FLAG_TX_STOPPED; |
| 691 | |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 692 | status = readb(&channel->control); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 693 | ZSDELAY(); |
| 694 | |
| 695 | /* TX busy? Just wait for the TX done interrupt. */ |
| 696 | if (!(status & Tx_BUF_EMP)) |
| 697 | return; |
| 698 | |
| 699 | /* Send the first character to jump-start the TX done |
| 700 | * IRQ sending engine. |
| 701 | */ |
| 702 | if (port->x_char) { |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 703 | writeb(port->x_char, &channel->data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 704 | ZSDELAY(); |
| 705 | ZS_WSYNC(channel); |
| 706 | |
| 707 | port->icount.tx++; |
| 708 | port->x_char = 0; |
| 709 | } else { |
Alan Cox | ebd2c8f | 2009-09-19 13:13:28 -0700 | [diff] [blame] | 710 | struct circ_buf *xmit = &port->state->xmit; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 711 | |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 712 | writeb(xmit->buf[xmit->tail], &channel->data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 713 | ZSDELAY(); |
| 714 | ZS_WSYNC(channel); |
| 715 | |
| 716 | xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); |
| 717 | port->icount.tx++; |
| 718 | |
| 719 | if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) |
| 720 | uart_write_wakeup(&up->port); |
| 721 | } |
| 722 | } |
| 723 | |
| 724 | /* The port lock is held. */ |
| 725 | static void sunzilog_stop_rx(struct uart_port *port) |
| 726 | { |
| 727 | struct uart_sunzilog_port *up = UART_ZILOG(port); |
| 728 | struct zilog_channel __iomem *channel; |
| 729 | |
| 730 | if (ZS_IS_CONS(up)) |
| 731 | return; |
| 732 | |
| 733 | channel = ZILOG_CHANNEL_FROM_PORT(port); |
| 734 | |
| 735 | /* Disable all RX interrupts. */ |
| 736 | up->curregs[R1] &= ~RxINT_MASK; |
| 737 | sunzilog_maybe_update_regs(up, channel); |
| 738 | } |
| 739 | |
| 740 | /* The port lock is held. */ |
| 741 | static void sunzilog_enable_ms(struct uart_port *port) |
| 742 | { |
| 743 | struct uart_sunzilog_port *up = (struct uart_sunzilog_port *) port; |
| 744 | struct zilog_channel __iomem *channel = ZILOG_CHANNEL_FROM_PORT(port); |
| 745 | unsigned char new_reg; |
| 746 | |
| 747 | new_reg = up->curregs[R15] | (DCDIE | SYNCIE | CTSIE); |
| 748 | if (new_reg != up->curregs[R15]) { |
| 749 | up->curregs[R15] = new_reg; |
| 750 | |
| 751 | /* NOTE: Not subject to 'transmitter active' rule. */ |
Mark Fortescue | 7cc5c85 | 2007-05-09 13:49:04 -0700 | [diff] [blame] | 752 | write_zsreg(channel, R15, up->curregs[R15] & ~WR7pEN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 753 | } |
| 754 | } |
| 755 | |
| 756 | /* The port lock is not held. */ |
| 757 | static void sunzilog_break_ctl(struct uart_port *port, int break_state) |
| 758 | { |
| 759 | struct uart_sunzilog_port *up = (struct uart_sunzilog_port *) port; |
| 760 | struct zilog_channel __iomem *channel = ZILOG_CHANNEL_FROM_PORT(port); |
| 761 | unsigned char set_bits, clear_bits, new_reg; |
| 762 | unsigned long flags; |
| 763 | |
| 764 | set_bits = clear_bits = 0; |
| 765 | |
| 766 | if (break_state) |
| 767 | set_bits |= SND_BRK; |
| 768 | else |
| 769 | clear_bits |= SND_BRK; |
| 770 | |
| 771 | spin_lock_irqsave(&port->lock, flags); |
| 772 | |
| 773 | new_reg = (up->curregs[R5] | set_bits) & ~clear_bits; |
| 774 | if (new_reg != up->curregs[R5]) { |
| 775 | up->curregs[R5] = new_reg; |
| 776 | |
| 777 | /* NOTE: Not subject to 'transmitter active' rule. */ |
| 778 | write_zsreg(channel, R5, up->curregs[R5]); |
| 779 | } |
| 780 | |
| 781 | spin_unlock_irqrestore(&port->lock, flags); |
| 782 | } |
| 783 | |
| 784 | static void __sunzilog_startup(struct uart_sunzilog_port *up) |
| 785 | { |
| 786 | struct zilog_channel __iomem *channel; |
| 787 | |
| 788 | channel = ZILOG_CHANNEL_FROM_PORT(&up->port); |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 789 | up->prev_status = readb(&channel->control); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 790 | |
| 791 | /* Enable receiver and transmitter. */ |
| 792 | up->curregs[R3] |= RxENAB; |
| 793 | up->curregs[R5] |= TxENAB; |
| 794 | |
| 795 | up->curregs[R1] |= EXT_INT_ENAB | INT_ALL_Rx | TxINT_ENAB; |
| 796 | sunzilog_maybe_update_regs(up, channel); |
| 797 | } |
| 798 | |
| 799 | static int sunzilog_startup(struct uart_port *port) |
| 800 | { |
| 801 | struct uart_sunzilog_port *up = UART_ZILOG(port); |
| 802 | unsigned long flags; |
| 803 | |
| 804 | if (ZS_IS_CONS(up)) |
| 805 | return 0; |
| 806 | |
| 807 | spin_lock_irqsave(&port->lock, flags); |
| 808 | __sunzilog_startup(up); |
| 809 | spin_unlock_irqrestore(&port->lock, flags); |
| 810 | return 0; |
| 811 | } |
| 812 | |
| 813 | /* |
| 814 | * The test for ZS_IS_CONS is explained by the following e-mail: |
| 815 | ***** |
| 816 | * From: Russell King <rmk@arm.linux.org.uk> |
| 817 | * Date: Sun, 8 Dec 2002 10:18:38 +0000 |
| 818 | * |
| 819 | * On Sun, Dec 08, 2002 at 02:43:36AM -0500, Pete Zaitcev wrote: |
| 820 | * > I boot my 2.5 boxes using "console=ttyS0,9600" argument, |
| 821 | * > and I noticed that something is not right with reference |
| 822 | * > counting in this case. It seems that when the console |
| 823 | * > is open by kernel initially, this is not accounted |
| 824 | * > as an open, and uart_startup is not called. |
| 825 | * |
| 826 | * That is correct. We are unable to call uart_startup when the serial |
| 827 | * console is initialised because it may need to allocate memory (as |
| 828 | * request_irq does) and the memory allocators may not have been |
| 829 | * initialised. |
| 830 | * |
| 831 | * 1. initialise the port into a state where it can send characters in the |
| 832 | * console write method. |
| 833 | * |
| 834 | * 2. don't do the actual hardware shutdown in your shutdown() method (but |
| 835 | * do the normal software shutdown - ie, free irqs etc) |
| 836 | ***** |
| 837 | */ |
| 838 | static void sunzilog_shutdown(struct uart_port *port) |
| 839 | { |
| 840 | struct uart_sunzilog_port *up = UART_ZILOG(port); |
| 841 | struct zilog_channel __iomem *channel; |
| 842 | unsigned long flags; |
| 843 | |
| 844 | if (ZS_IS_CONS(up)) |
| 845 | return; |
| 846 | |
| 847 | spin_lock_irqsave(&port->lock, flags); |
| 848 | |
| 849 | channel = ZILOG_CHANNEL_FROM_PORT(port); |
| 850 | |
| 851 | /* Disable receiver and transmitter. */ |
| 852 | up->curregs[R3] &= ~RxENAB; |
| 853 | up->curregs[R5] &= ~TxENAB; |
| 854 | |
| 855 | /* Disable all interrupts and BRK assertion. */ |
| 856 | up->curregs[R1] &= ~(EXT_INT_ENAB | TxINT_ENAB | RxINT_MASK); |
| 857 | up->curregs[R5] &= ~SND_BRK; |
| 858 | sunzilog_maybe_update_regs(up, channel); |
| 859 | |
| 860 | spin_unlock_irqrestore(&port->lock, flags); |
| 861 | } |
| 862 | |
| 863 | /* Shared by TTY driver and serial console setup. The port lock is held |
| 864 | * and local interrupts are disabled. |
| 865 | */ |
| 866 | static void |
| 867 | sunzilog_convert_to_zs(struct uart_sunzilog_port *up, unsigned int cflag, |
| 868 | unsigned int iflag, int brg) |
| 869 | { |
| 870 | |
| 871 | up->curregs[R10] = NRZ; |
| 872 | up->curregs[R11] = TCBR | RCBR; |
| 873 | |
| 874 | /* Program BAUD and clock source. */ |
| 875 | up->curregs[R4] &= ~XCLK_MASK; |
| 876 | up->curregs[R4] |= X16CLK; |
| 877 | up->curregs[R12] = brg & 0xff; |
| 878 | up->curregs[R13] = (brg >> 8) & 0xff; |
| 879 | up->curregs[R14] = BRSRC | BRENAB; |
| 880 | |
| 881 | /* Character size, stop bits, and parity. */ |
Mark Fortescue | 7cc5c85 | 2007-05-09 13:49:04 -0700 | [diff] [blame] | 882 | up->curregs[R3] &= ~RxN_MASK; |
| 883 | up->curregs[R5] &= ~TxN_MASK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 884 | switch (cflag & CSIZE) { |
| 885 | case CS5: |
Mark Fortescue | 7cc5c85 | 2007-05-09 13:49:04 -0700 | [diff] [blame] | 886 | up->curregs[R3] |= Rx5; |
| 887 | up->curregs[R5] |= Tx5; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 888 | up->parity_mask = 0x1f; |
| 889 | break; |
| 890 | case CS6: |
Mark Fortescue | 7cc5c85 | 2007-05-09 13:49:04 -0700 | [diff] [blame] | 891 | up->curregs[R3] |= Rx6; |
| 892 | up->curregs[R5] |= Tx6; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 893 | up->parity_mask = 0x3f; |
| 894 | break; |
| 895 | case CS7: |
Mark Fortescue | 7cc5c85 | 2007-05-09 13:49:04 -0700 | [diff] [blame] | 896 | up->curregs[R3] |= Rx7; |
| 897 | up->curregs[R5] |= Tx7; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 898 | up->parity_mask = 0x7f; |
| 899 | break; |
| 900 | case CS8: |
| 901 | default: |
Mark Fortescue | 7cc5c85 | 2007-05-09 13:49:04 -0700 | [diff] [blame] | 902 | up->curregs[R3] |= Rx8; |
| 903 | up->curregs[R5] |= Tx8; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 904 | up->parity_mask = 0xff; |
| 905 | break; |
| 906 | }; |
Mark Fortescue | 7cc5c85 | 2007-05-09 13:49:04 -0700 | [diff] [blame] | 907 | up->curregs[R4] &= ~0x0c; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 908 | if (cflag & CSTOPB) |
Mark Fortescue | 7cc5c85 | 2007-05-09 13:49:04 -0700 | [diff] [blame] | 909 | up->curregs[R4] |= SB2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 910 | else |
Mark Fortescue | 7cc5c85 | 2007-05-09 13:49:04 -0700 | [diff] [blame] | 911 | up->curregs[R4] |= SB1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 912 | if (cflag & PARENB) |
Mark Fortescue | 7cc5c85 | 2007-05-09 13:49:04 -0700 | [diff] [blame] | 913 | up->curregs[R4] |= PAR_ENAB; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 914 | else |
Mark Fortescue | 7cc5c85 | 2007-05-09 13:49:04 -0700 | [diff] [blame] | 915 | up->curregs[R4] &= ~PAR_ENAB; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 916 | if (!(cflag & PARODD)) |
Mark Fortescue | 7cc5c85 | 2007-05-09 13:49:04 -0700 | [diff] [blame] | 917 | up->curregs[R4] |= PAR_EVEN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 918 | else |
Mark Fortescue | 7cc5c85 | 2007-05-09 13:49:04 -0700 | [diff] [blame] | 919 | up->curregs[R4] &= ~PAR_EVEN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 920 | |
| 921 | up->port.read_status_mask = Rx_OVR; |
| 922 | if (iflag & INPCK) |
| 923 | up->port.read_status_mask |= CRC_ERR | PAR_ERR; |
| 924 | if (iflag & (BRKINT | PARMRK)) |
| 925 | up->port.read_status_mask |= BRK_ABRT; |
| 926 | |
| 927 | up->port.ignore_status_mask = 0; |
| 928 | if (iflag & IGNPAR) |
| 929 | up->port.ignore_status_mask |= CRC_ERR | PAR_ERR; |
| 930 | if (iflag & IGNBRK) { |
| 931 | up->port.ignore_status_mask |= BRK_ABRT; |
| 932 | if (iflag & IGNPAR) |
| 933 | up->port.ignore_status_mask |= Rx_OVR; |
| 934 | } |
| 935 | |
| 936 | if ((cflag & CREAD) == 0) |
| 937 | up->port.ignore_status_mask = 0xff; |
| 938 | } |
| 939 | |
| 940 | /* The port lock is not held. */ |
| 941 | static void |
Alan Cox | 606d099 | 2006-12-08 02:38:45 -0800 | [diff] [blame] | 942 | sunzilog_set_termios(struct uart_port *port, struct ktermios *termios, |
| 943 | struct ktermios *old) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 944 | { |
| 945 | struct uart_sunzilog_port *up = (struct uart_sunzilog_port *) port; |
| 946 | unsigned long flags; |
| 947 | int baud, brg; |
| 948 | |
| 949 | baud = uart_get_baud_rate(port, termios, old, 1200, 76800); |
| 950 | |
| 951 | spin_lock_irqsave(&up->port.lock, flags); |
| 952 | |
| 953 | brg = BPS_TO_BRG(baud, ZS_CLOCK / ZS_CLOCK_DIVISOR); |
| 954 | |
| 955 | sunzilog_convert_to_zs(up, termios->c_cflag, termios->c_iflag, brg); |
| 956 | |
| 957 | if (UART_ENABLE_MS(&up->port, termios->c_cflag)) |
| 958 | up->flags |= SUNZILOG_FLAG_MODEM_STATUS; |
| 959 | else |
| 960 | up->flags &= ~SUNZILOG_FLAG_MODEM_STATUS; |
| 961 | |
| 962 | up->cflag = termios->c_cflag; |
| 963 | |
| 964 | sunzilog_maybe_update_regs(up, ZILOG_CHANNEL_FROM_PORT(port)); |
| 965 | |
| 966 | uart_update_timeout(port, termios->c_cflag, baud); |
| 967 | |
| 968 | spin_unlock_irqrestore(&up->port.lock, flags); |
| 969 | } |
| 970 | |
| 971 | static const char *sunzilog_type(struct uart_port *port) |
| 972 | { |
Mark Fortescue | 7cc5c85 | 2007-05-09 13:49:04 -0700 | [diff] [blame] | 973 | struct uart_sunzilog_port *up = UART_ZILOG(port); |
| 974 | |
| 975 | return (up->flags & SUNZILOG_FLAG_ESCC) ? "zs (ESCC)" : "zs"; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 976 | } |
| 977 | |
| 978 | /* We do not request/release mappings of the registers here, this |
| 979 | * happens at early serial probe time. |
| 980 | */ |
| 981 | static void sunzilog_release_port(struct uart_port *port) |
| 982 | { |
| 983 | } |
| 984 | |
| 985 | static int sunzilog_request_port(struct uart_port *port) |
| 986 | { |
| 987 | return 0; |
| 988 | } |
| 989 | |
| 990 | /* These do not need to do anything interesting either. */ |
| 991 | static void sunzilog_config_port(struct uart_port *port, int flags) |
| 992 | { |
| 993 | } |
| 994 | |
| 995 | /* We do not support letting the user mess with the divisor, IRQ, etc. */ |
| 996 | static int sunzilog_verify_port(struct uart_port *port, struct serial_struct *ser) |
| 997 | { |
| 998 | return -EINVAL; |
| 999 | } |
| 1000 | |
Jason Wessel | 6d45a1a | 2010-05-20 21:04:23 -0500 | [diff] [blame] | 1001 | #ifdef CONFIG_CONSOLE_POLL |
| 1002 | static int sunzilog_get_poll_char(struct uart_port *port) |
| 1003 | { |
| 1004 | unsigned char ch, r1; |
| 1005 | struct uart_sunzilog_port *up = (struct uart_sunzilog_port *) port; |
| 1006 | struct zilog_channel __iomem *channel |
| 1007 | = ZILOG_CHANNEL_FROM_PORT(&up->port); |
| 1008 | |
| 1009 | |
| 1010 | r1 = read_zsreg(channel, R1); |
| 1011 | if (r1 & (PAR_ERR | Rx_OVR | CRC_ERR)) { |
| 1012 | writeb(ERR_RES, &channel->control); |
| 1013 | ZSDELAY(); |
| 1014 | ZS_WSYNC(channel); |
| 1015 | } |
| 1016 | |
| 1017 | ch = readb(&channel->control); |
| 1018 | ZSDELAY(); |
| 1019 | |
| 1020 | /* This funny hack depends upon BRK_ABRT not interfering |
| 1021 | * with the other bits we care about in R1. |
| 1022 | */ |
| 1023 | if (ch & BRK_ABRT) |
| 1024 | r1 |= BRK_ABRT; |
| 1025 | |
| 1026 | if (!(ch & Rx_CH_AV)) |
| 1027 | return NO_POLL_CHAR; |
| 1028 | |
| 1029 | ch = readb(&channel->data); |
| 1030 | ZSDELAY(); |
| 1031 | |
| 1032 | ch &= up->parity_mask; |
| 1033 | return ch; |
| 1034 | } |
| 1035 | |
| 1036 | static void sunzilog_put_poll_char(struct uart_port *port, |
| 1037 | unsigned char ch) |
| 1038 | { |
| 1039 | struct uart_sunzilog_port *up = (struct uart_sunzilog_port *)port; |
| 1040 | |
| 1041 | sunzilog_putchar(&up->port, ch); |
| 1042 | } |
| 1043 | #endif /* CONFIG_CONSOLE_POLL */ |
| 1044 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1045 | static struct uart_ops sunzilog_pops = { |
| 1046 | .tx_empty = sunzilog_tx_empty, |
| 1047 | .set_mctrl = sunzilog_set_mctrl, |
| 1048 | .get_mctrl = sunzilog_get_mctrl, |
| 1049 | .stop_tx = sunzilog_stop_tx, |
| 1050 | .start_tx = sunzilog_start_tx, |
| 1051 | .stop_rx = sunzilog_stop_rx, |
| 1052 | .enable_ms = sunzilog_enable_ms, |
| 1053 | .break_ctl = sunzilog_break_ctl, |
| 1054 | .startup = sunzilog_startup, |
| 1055 | .shutdown = sunzilog_shutdown, |
| 1056 | .set_termios = sunzilog_set_termios, |
| 1057 | .type = sunzilog_type, |
| 1058 | .release_port = sunzilog_release_port, |
| 1059 | .request_port = sunzilog_request_port, |
| 1060 | .config_port = sunzilog_config_port, |
| 1061 | .verify_port = sunzilog_verify_port, |
Jason Wessel | 6d45a1a | 2010-05-20 21:04:23 -0500 | [diff] [blame] | 1062 | #ifdef CONFIG_CONSOLE_POLL |
| 1063 | .poll_get_char = sunzilog_get_poll_char, |
| 1064 | .poll_put_char = sunzilog_put_poll_char, |
| 1065 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1066 | }; |
| 1067 | |
Robert Reif | 227739b | 2008-04-24 03:37:51 -0700 | [diff] [blame] | 1068 | static int uart_chip_count; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1069 | static struct uart_sunzilog_port *sunzilog_port_table; |
| 1070 | static struct zilog_layout __iomem **sunzilog_chip_regs; |
| 1071 | |
| 1072 | static struct uart_sunzilog_port *sunzilog_irq_chain; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1073 | |
| 1074 | static struct uart_driver sunzilog_reg = { |
| 1075 | .owner = THIS_MODULE, |
David S. Miller | 32039f4 | 2008-05-01 01:14:27 -0700 | [diff] [blame] | 1076 | .driver_name = "sunzilog", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1077 | .dev_name = "ttyS", |
| 1078 | .major = TTY_MAJOR, |
| 1079 | }; |
| 1080 | |
Martin Habets | 58d784a | 2007-12-11 03:37:04 -0800 | [diff] [blame] | 1081 | static int __init sunzilog_alloc_tables(int num_sunzilog) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1082 | { |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1083 | struct uart_sunzilog_port *up; |
| 1084 | unsigned long size; |
Martin Habets | 58d784a | 2007-12-11 03:37:04 -0800 | [diff] [blame] | 1085 | int num_channels = num_sunzilog * 2; |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1086 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1087 | |
Martin Habets | 58d784a | 2007-12-11 03:37:04 -0800 | [diff] [blame] | 1088 | size = num_channels * sizeof(struct uart_sunzilog_port); |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1089 | sunzilog_port_table = kzalloc(size, GFP_KERNEL); |
| 1090 | if (!sunzilog_port_table) |
| 1091 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1092 | |
Martin Habets | 58d784a | 2007-12-11 03:37:04 -0800 | [diff] [blame] | 1093 | for (i = 0; i < num_channels; i++) { |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1094 | up = &sunzilog_port_table[i]; |
| 1095 | |
| 1096 | spin_lock_init(&up->port.lock); |
| 1097 | |
| 1098 | if (i == 0) |
| 1099 | sunzilog_irq_chain = up; |
| 1100 | |
Martin Habets | 58d784a | 2007-12-11 03:37:04 -0800 | [diff] [blame] | 1101 | if (i < num_channels - 1) |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1102 | up->next = up + 1; |
| 1103 | else |
| 1104 | up->next = NULL; |
| 1105 | } |
| 1106 | |
Martin Habets | 58d784a | 2007-12-11 03:37:04 -0800 | [diff] [blame] | 1107 | size = num_sunzilog * sizeof(struct zilog_layout __iomem *); |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1108 | sunzilog_chip_regs = kzalloc(size, GFP_KERNEL); |
| 1109 | if (!sunzilog_chip_regs) { |
| 1110 | kfree(sunzilog_port_table); |
| 1111 | sunzilog_irq_chain = NULL; |
| 1112 | return -ENOMEM; |
| 1113 | } |
| 1114 | |
| 1115 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1116 | } |
| 1117 | |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1118 | static void sunzilog_free_tables(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1119 | { |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1120 | kfree(sunzilog_port_table); |
| 1121 | sunzilog_irq_chain = NULL; |
| 1122 | kfree(sunzilog_chip_regs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1123 | } |
| 1124 | |
| 1125 | #define ZS_PUT_CHAR_MAX_DELAY 2000 /* 10 ms */ |
| 1126 | |
Russell King | d358788 | 2006-03-20 20:00:09 +0000 | [diff] [blame] | 1127 | static void sunzilog_putchar(struct uart_port *port, int ch) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1128 | { |
Al Viro | 4834327 | 2006-10-10 22:44:47 +0100 | [diff] [blame] | 1129 | struct zilog_channel __iomem *channel = ZILOG_CHANNEL_FROM_PORT(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1130 | int loops = ZS_PUT_CHAR_MAX_DELAY; |
| 1131 | |
| 1132 | /* This is a timed polling loop so do not switch the explicit |
| 1133 | * udelay with ZSDELAY as that is a NOP on some platforms. -DaveM |
| 1134 | */ |
| 1135 | do { |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1136 | unsigned char val = readb(&channel->control); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1137 | if (val & Tx_BUF_EMP) { |
| 1138 | ZSDELAY(); |
| 1139 | break; |
| 1140 | } |
| 1141 | udelay(5); |
| 1142 | } while (--loops); |
| 1143 | |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1144 | writeb(ch, &channel->data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1145 | ZSDELAY(); |
| 1146 | ZS_WSYNC(channel); |
| 1147 | } |
| 1148 | |
| 1149 | #ifdef CONFIG_SERIO |
| 1150 | |
| 1151 | static DEFINE_SPINLOCK(sunzilog_serio_lock); |
| 1152 | |
| 1153 | static int sunzilog_serio_write(struct serio *serio, unsigned char ch) |
| 1154 | { |
| 1155 | struct uart_sunzilog_port *up = serio->port_data; |
| 1156 | unsigned long flags; |
| 1157 | |
| 1158 | spin_lock_irqsave(&sunzilog_serio_lock, flags); |
| 1159 | |
Russell King | d358788 | 2006-03-20 20:00:09 +0000 | [diff] [blame] | 1160 | sunzilog_putchar(&up->port, ch); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1161 | |
| 1162 | spin_unlock_irqrestore(&sunzilog_serio_lock, flags); |
| 1163 | |
| 1164 | return 0; |
| 1165 | } |
| 1166 | |
| 1167 | static int sunzilog_serio_open(struct serio *serio) |
| 1168 | { |
| 1169 | struct uart_sunzilog_port *up = serio->port_data; |
| 1170 | unsigned long flags; |
| 1171 | int ret; |
| 1172 | |
| 1173 | spin_lock_irqsave(&sunzilog_serio_lock, flags); |
| 1174 | if (!up->serio_open) { |
| 1175 | up->serio_open = 1; |
| 1176 | ret = 0; |
| 1177 | } else |
| 1178 | ret = -EBUSY; |
| 1179 | spin_unlock_irqrestore(&sunzilog_serio_lock, flags); |
| 1180 | |
| 1181 | return ret; |
| 1182 | } |
| 1183 | |
| 1184 | static void sunzilog_serio_close(struct serio *serio) |
| 1185 | { |
| 1186 | struct uart_sunzilog_port *up = serio->port_data; |
| 1187 | unsigned long flags; |
| 1188 | |
| 1189 | spin_lock_irqsave(&sunzilog_serio_lock, flags); |
| 1190 | up->serio_open = 0; |
| 1191 | spin_unlock_irqrestore(&sunzilog_serio_lock, flags); |
| 1192 | } |
| 1193 | |
| 1194 | #endif /* CONFIG_SERIO */ |
| 1195 | |
| 1196 | #ifdef CONFIG_SERIAL_SUNZILOG_CONSOLE |
| 1197 | static void |
| 1198 | sunzilog_console_write(struct console *con, const char *s, unsigned int count) |
| 1199 | { |
| 1200 | struct uart_sunzilog_port *up = &sunzilog_port_table[con->index]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1201 | unsigned long flags; |
David S. Miller | f3c681c | 2007-07-15 23:53:32 -0700 | [diff] [blame] | 1202 | int locked = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1203 | |
David S. Miller | f3c681c | 2007-07-15 23:53:32 -0700 | [diff] [blame] | 1204 | local_irq_save(flags); |
| 1205 | if (up->port.sysrq) { |
| 1206 | locked = 0; |
| 1207 | } else if (oops_in_progress) { |
| 1208 | locked = spin_trylock(&up->port.lock); |
| 1209 | } else |
| 1210 | spin_lock(&up->port.lock); |
| 1211 | |
Russell King | d358788 | 2006-03-20 20:00:09 +0000 | [diff] [blame] | 1212 | uart_console_write(&up->port, s, count, sunzilog_putchar); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1213 | udelay(2); |
David S. Miller | f3c681c | 2007-07-15 23:53:32 -0700 | [diff] [blame] | 1214 | |
| 1215 | if (locked) |
| 1216 | spin_unlock(&up->port.lock); |
| 1217 | local_irq_restore(flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1218 | } |
| 1219 | |
| 1220 | static int __init sunzilog_console_setup(struct console *con, char *options) |
| 1221 | { |
| 1222 | struct uart_sunzilog_port *up = &sunzilog_port_table[con->index]; |
| 1223 | unsigned long flags; |
| 1224 | int baud, brg; |
| 1225 | |
David S. Miller | b8b99e8 | 2006-08-23 15:53:39 -0700 | [diff] [blame] | 1226 | if (up->port.type != PORT_SUNZILOG) |
| 1227 | return -1; |
| 1228 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1229 | printk(KERN_INFO "Console: ttyS%d (SunZilog zs%d)\n", |
| 1230 | (sunzilog_reg.minor - 64) + con->index, con->index); |
| 1231 | |
| 1232 | /* Get firmware console settings. */ |
Grant Likely | 61c7a08 | 2010-04-13 16:12:29 -0700 | [diff] [blame] | 1233 | sunserial_console_termios(con, to_of_device(up->port.dev)->dev.of_node); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1234 | |
| 1235 | /* Firmware console speed is limited to 150-->38400 baud so |
| 1236 | * this hackish cflag thing is OK. |
| 1237 | */ |
| 1238 | switch (con->cflag & CBAUD) { |
| 1239 | case B150: baud = 150; break; |
| 1240 | case B300: baud = 300; break; |
| 1241 | case B600: baud = 600; break; |
| 1242 | case B1200: baud = 1200; break; |
| 1243 | case B2400: baud = 2400; break; |
| 1244 | case B4800: baud = 4800; break; |
| 1245 | default: case B9600: baud = 9600; break; |
| 1246 | case B19200: baud = 19200; break; |
| 1247 | case B38400: baud = 38400; break; |
| 1248 | }; |
| 1249 | |
| 1250 | brg = BPS_TO_BRG(baud, ZS_CLOCK / ZS_CLOCK_DIVISOR); |
| 1251 | |
| 1252 | spin_lock_irqsave(&up->port.lock, flags); |
| 1253 | |
Mark Fortescue | 7cc5c85 | 2007-05-09 13:49:04 -0700 | [diff] [blame] | 1254 | up->curregs[R15] |= BRKIE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1255 | sunzilog_convert_to_zs(up, con->cflag, 0, brg); |
| 1256 | |
| 1257 | sunzilog_set_mctrl(&up->port, TIOCM_DTR | TIOCM_RTS); |
| 1258 | __sunzilog_startup(up); |
| 1259 | |
| 1260 | spin_unlock_irqrestore(&up->port.lock, flags); |
| 1261 | |
| 1262 | return 0; |
| 1263 | } |
| 1264 | |
Martin Habets | eba8cef | 2006-10-10 14:44:01 -0700 | [diff] [blame] | 1265 | static struct console sunzilog_console_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1266 | .name = "ttyS", |
| 1267 | .write = sunzilog_console_write, |
| 1268 | .device = uart_console_device, |
| 1269 | .setup = sunzilog_console_setup, |
| 1270 | .flags = CON_PRINTBUFFER, |
| 1271 | .index = -1, |
| 1272 | .data = &sunzilog_reg, |
| 1273 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1274 | |
David S. Miller | 1ddb7c9 | 2006-02-13 20:09:10 -0800 | [diff] [blame] | 1275 | static inline struct console *SUNZILOG_CONSOLE(void) |
| 1276 | { |
Martin Habets | eba8cef | 2006-10-10 14:44:01 -0700 | [diff] [blame] | 1277 | return &sunzilog_console_ops; |
David S. Miller | 1ddb7c9 | 2006-02-13 20:09:10 -0800 | [diff] [blame] | 1278 | } |
| 1279 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1280 | #else |
David S. Miller | 1ddb7c9 | 2006-02-13 20:09:10 -0800 | [diff] [blame] | 1281 | #define SUNZILOG_CONSOLE() (NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1282 | #endif |
| 1283 | |
Robert Reif | 3ade116 | 2008-04-26 23:10:19 -0700 | [diff] [blame] | 1284 | static void __devinit sunzilog_init_kbdms(struct uart_sunzilog_port *up) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1285 | { |
| 1286 | int baud, brg; |
| 1287 | |
David S. Miller | 8a84eb1 | 2006-07-19 22:55:08 -0700 | [diff] [blame] | 1288 | if (up->flags & SUNZILOG_FLAG_CONS_KEYB) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1289 | up->cflag = B1200 | CS8 | CLOCAL | CREAD; |
| 1290 | baud = 1200; |
| 1291 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1292 | up->cflag = B4800 | CS8 | CLOCAL | CREAD; |
| 1293 | baud = 4800; |
| 1294 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1295 | |
Mark Fortescue | 7cc5c85 | 2007-05-09 13:49:04 -0700 | [diff] [blame] | 1296 | up->curregs[R15] |= BRKIE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1297 | brg = BPS_TO_BRG(baud, ZS_CLOCK / ZS_CLOCK_DIVISOR); |
| 1298 | sunzilog_convert_to_zs(up, up->cflag, 0, brg); |
| 1299 | sunzilog_set_mctrl(&up->port, TIOCM_DTR | TIOCM_RTS); |
| 1300 | __sunzilog_startup(up); |
| 1301 | } |
| 1302 | |
| 1303 | #ifdef CONFIG_SERIO |
Krzysztof Helt | 9977e39 | 2007-05-19 12:06:02 -0700 | [diff] [blame] | 1304 | static void __devinit sunzilog_register_serio(struct uart_sunzilog_port *up) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1305 | { |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1306 | struct serio *serio = &up->serio; |
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 | serio->port_data = up; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1309 | |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1310 | serio->id.type = SERIO_RS232; |
David S. Miller | 8a84eb1 | 2006-07-19 22:55:08 -0700 | [diff] [blame] | 1311 | if (up->flags & SUNZILOG_FLAG_CONS_KEYB) { |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1312 | serio->id.proto = SERIO_SUNKBD; |
| 1313 | strlcpy(serio->name, "zskbd", sizeof(serio->name)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1314 | } else { |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1315 | serio->id.proto = SERIO_SUN; |
| 1316 | serio->id.extra = 1; |
| 1317 | strlcpy(serio->name, "zsms", sizeof(serio->name)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1318 | } |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1319 | strlcpy(serio->phys, |
David S. Miller | 8a84eb1 | 2006-07-19 22:55:08 -0700 | [diff] [blame] | 1320 | ((up->flags & SUNZILOG_FLAG_CONS_KEYB) ? |
| 1321 | "zs/serio0" : "zs/serio1"), |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1322 | sizeof(serio->phys)); |
| 1323 | |
| 1324 | serio->write = sunzilog_serio_write; |
| 1325 | serio->open = sunzilog_serio_open; |
| 1326 | serio->close = sunzilog_serio_close; |
| 1327 | serio->dev.parent = up->port.dev; |
| 1328 | |
| 1329 | serio_register_port(serio); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1330 | } |
| 1331 | #endif |
| 1332 | |
David S. Miller | fbe96f9 | 2006-09-27 19:52:35 -0700 | [diff] [blame] | 1333 | static void __devinit sunzilog_init_hw(struct uart_sunzilog_port *up) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1334 | { |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1335 | struct zilog_channel __iomem *channel; |
| 1336 | unsigned long flags; |
| 1337 | int baud, brg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1338 | |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1339 | channel = ZILOG_CHANNEL_FROM_PORT(&up->port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1340 | |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1341 | spin_lock_irqsave(&up->port.lock, flags); |
| 1342 | if (ZS_IS_CHANNEL_A(up)) { |
| 1343 | write_zsreg(channel, R9, FHWRES); |
| 1344 | ZSDELAY_LONG(); |
| 1345 | (void) read_zsreg(channel, R0); |
| 1346 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1347 | |
David S. Miller | 8a84eb1 | 2006-07-19 22:55:08 -0700 | [diff] [blame] | 1348 | if (up->flags & (SUNZILOG_FLAG_CONS_KEYB | |
| 1349 | SUNZILOG_FLAG_CONS_MOUSE)) { |
Mark Fortescue | 7cc5c85 | 2007-05-09 13:49:04 -0700 | [diff] [blame] | 1350 | up->curregs[R1] = EXT_INT_ENAB | INT_ALL_Rx | TxINT_ENAB; |
| 1351 | up->curregs[R4] = PAR_EVEN | X16CLK | SB1; |
| 1352 | up->curregs[R3] = RxENAB | Rx8; |
| 1353 | up->curregs[R5] = TxENAB | Tx8; |
| 1354 | up->curregs[R6] = 0x00; /* SDLC Address */ |
| 1355 | up->curregs[R7] = 0x7E; /* SDLC Flag */ |
| 1356 | up->curregs[R9] = NV; |
| 1357 | up->curregs[R7p] = 0x00; |
Robert Reif | 3ade116 | 2008-04-26 23:10:19 -0700 | [diff] [blame] | 1358 | sunzilog_init_kbdms(up); |
Mark Fortescue | 7cc5c85 | 2007-05-09 13:49:04 -0700 | [diff] [blame] | 1359 | /* Only enable interrupts if an ISR handler available */ |
| 1360 | if (up->flags & SUNZILOG_FLAG_ISR_HANDLER) |
| 1361 | up->curregs[R9] |= MIE; |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1362 | write_zsreg(channel, R9, up->curregs[R9]); |
| 1363 | } else { |
| 1364 | /* Normal serial TTY. */ |
| 1365 | up->parity_mask = 0xff; |
| 1366 | up->curregs[R1] = EXT_INT_ENAB | INT_ALL_Rx | TxINT_ENAB; |
| 1367 | up->curregs[R4] = PAR_EVEN | X16CLK | SB1; |
| 1368 | up->curregs[R3] = RxENAB | Rx8; |
| 1369 | up->curregs[R5] = TxENAB | Tx8; |
Mark Fortescue | 7cc5c85 | 2007-05-09 13:49:04 -0700 | [diff] [blame] | 1370 | up->curregs[R6] = 0x00; /* SDLC Address */ |
| 1371 | up->curregs[R7] = 0x7E; /* SDLC Flag */ |
| 1372 | up->curregs[R9] = NV; |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1373 | up->curregs[R10] = NRZ; |
| 1374 | up->curregs[R11] = TCBR | RCBR; |
| 1375 | baud = 9600; |
| 1376 | brg = BPS_TO_BRG(baud, ZS_CLOCK / ZS_CLOCK_DIVISOR); |
| 1377 | up->curregs[R12] = (brg & 0xff); |
| 1378 | up->curregs[R13] = (brg >> 8) & 0xff; |
| 1379 | up->curregs[R14] = BRSRC | BRENAB; |
Mark Fortescue | 7cc5c85 | 2007-05-09 13:49:04 -0700 | [diff] [blame] | 1380 | up->curregs[R15] = FIFOEN; /* Use FIFO if on ESCC */ |
| 1381 | up->curregs[R7p] = TxFIFO_LVL | RxFIFO_LVL; |
| 1382 | if (__load_zsregs(channel, up->curregs)) { |
| 1383 | up->flags |= SUNZILOG_FLAG_ESCC; |
| 1384 | } |
| 1385 | /* Only enable interrupts if an ISR handler available */ |
| 1386 | if (up->flags & SUNZILOG_FLAG_ISR_HANDLER) |
| 1387 | up->curregs[R9] |= MIE; |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1388 | write_zsreg(channel, R9, up->curregs[R9]); |
| 1389 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1390 | |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1391 | spin_unlock_irqrestore(&up->port.lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1392 | |
| 1393 | #ifdef CONFIG_SERIO |
David S. Miller | 8a84eb1 | 2006-07-19 22:55:08 -0700 | [diff] [blame] | 1394 | if (up->flags & (SUNZILOG_FLAG_CONS_KEYB | |
| 1395 | SUNZILOG_FLAG_CONS_MOUSE)) |
| 1396 | sunzilog_register_serio(up); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1397 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1398 | } |
| 1399 | |
David S. Miller | 4fa97dc | 2006-06-29 15:13:40 -0700 | [diff] [blame] | 1400 | static int zilog_irq = -1; |
| 1401 | |
David S. Miller | 67e23a1 | 2006-07-17 21:07:17 -0700 | [diff] [blame] | 1402 | 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] | 1403 | { |
Robert Reif | 227739b | 2008-04-24 03:37:51 -0700 | [diff] [blame] | 1404 | static int kbm_inst, uart_inst; |
| 1405 | int inst; |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1406 | struct uart_sunzilog_port *up; |
| 1407 | struct zilog_layout __iomem *rp; |
Robert Reif | 227739b | 2008-04-24 03:37:51 -0700 | [diff] [blame] | 1408 | int keyboard_mouse = 0; |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1409 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1410 | |
Grant Likely | 61c7a08 | 2010-04-13 16:12:29 -0700 | [diff] [blame] | 1411 | if (of_find_property(op->dev.of_node, "keyboard", NULL)) |
David S. Miller | 8a84eb1 | 2006-07-19 22:55:08 -0700 | [diff] [blame] | 1412 | keyboard_mouse = 1; |
| 1413 | |
Robert Reif | 227739b | 2008-04-24 03:37:51 -0700 | [diff] [blame] | 1414 | /* uarts must come before keyboards/mice */ |
| 1415 | if (keyboard_mouse) |
| 1416 | inst = uart_chip_count + kbm_inst; |
| 1417 | else |
| 1418 | inst = uart_inst; |
| 1419 | |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1420 | sunzilog_chip_regs[inst] = of_ioremap(&op->resource[0], 0, |
| 1421 | sizeof(struct zilog_layout), |
| 1422 | "zs"); |
| 1423 | if (!sunzilog_chip_regs[inst]) |
| 1424 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1425 | |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1426 | rp = sunzilog_chip_regs[inst]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1427 | |
David S. Miller | b77d35b | 2006-07-19 21:04:04 -0700 | [diff] [blame] | 1428 | if (zilog_irq == -1) |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1429 | zilog_irq = op->irqs[0]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1430 | |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1431 | up = &sunzilog_port_table[inst * 2]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1432 | |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1433 | /* Channel A */ |
| 1434 | up[0].port.mapbase = op->resource[0].start + 0x00; |
| 1435 | up[0].port.membase = (void __iomem *) &rp->channelA; |
| 1436 | up[0].port.iotype = UPIO_MEM; |
| 1437 | up[0].port.irq = op->irqs[0]; |
| 1438 | up[0].port.uartclk = ZS_CLOCK; |
| 1439 | up[0].port.fifosize = 1; |
| 1440 | up[0].port.ops = &sunzilog_pops; |
| 1441 | up[0].port.type = PORT_SUNZILOG; |
| 1442 | up[0].port.flags = 0; |
| 1443 | up[0].port.line = (inst * 2) + 0; |
| 1444 | up[0].port.dev = &op->dev; |
| 1445 | up[0].flags |= SUNZILOG_FLAG_IS_CHANNEL_A; |
David S. Miller | 8a84eb1 | 2006-07-19 22:55:08 -0700 | [diff] [blame] | 1446 | if (keyboard_mouse) |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1447 | up[0].flags |= SUNZILOG_FLAG_CONS_KEYB; |
| 1448 | sunzilog_init_hw(&up[0]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1449 | |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1450 | /* Channel B */ |
| 1451 | up[1].port.mapbase = op->resource[0].start + 0x04; |
| 1452 | up[1].port.membase = (void __iomem *) &rp->channelB; |
| 1453 | up[1].port.iotype = UPIO_MEM; |
| 1454 | up[1].port.irq = op->irqs[0]; |
| 1455 | up[1].port.uartclk = ZS_CLOCK; |
| 1456 | up[1].port.fifosize = 1; |
| 1457 | up[1].port.ops = &sunzilog_pops; |
| 1458 | up[1].port.type = PORT_SUNZILOG; |
| 1459 | up[1].port.flags = 0; |
| 1460 | up[1].port.line = (inst * 2) + 1; |
| 1461 | up[1].port.dev = &op->dev; |
| 1462 | up[1].flags |= 0; |
David S. Miller | 8a84eb1 | 2006-07-19 22:55:08 -0700 | [diff] [blame] | 1463 | if (keyboard_mouse) |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1464 | up[1].flags |= SUNZILOG_FLAG_CONS_MOUSE; |
| 1465 | sunzilog_init_hw(&up[1]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1466 | |
David S. Miller | 8a84eb1 | 2006-07-19 22:55:08 -0700 | [diff] [blame] | 1467 | if (!keyboard_mouse) { |
Grant Likely | 61c7a08 | 2010-04-13 16:12:29 -0700 | [diff] [blame] | 1468 | if (sunserial_console_match(SUNZILOG_CONSOLE(), op->dev.of_node, |
David S. Miller | 4e3533d | 2009-11-24 14:03:34 -0800 | [diff] [blame] | 1469 | &sunzilog_reg, up[0].port.line, |
| 1470 | false)) |
David S. Miller | c73fcc8 | 2007-07-20 16:59:26 -0700 | [diff] [blame] | 1471 | up->flags |= SUNZILOG_FLAG_IS_CONS; |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1472 | err = uart_add_one_port(&sunzilog_reg, &up[0].port); |
| 1473 | if (err) { |
David S. Miller | e3a411a3 | 2006-12-28 21:01:32 -0800 | [diff] [blame] | 1474 | of_iounmap(&op->resource[0], |
| 1475 | rp, sizeof(struct zilog_layout)); |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1476 | return err; |
| 1477 | } |
Grant Likely | 61c7a08 | 2010-04-13 16:12:29 -0700 | [diff] [blame] | 1478 | if (sunserial_console_match(SUNZILOG_CONSOLE(), op->dev.of_node, |
David S. Miller | 4e3533d | 2009-11-24 14:03:34 -0800 | [diff] [blame] | 1479 | &sunzilog_reg, up[1].port.line, |
| 1480 | false)) |
David S. Miller | c73fcc8 | 2007-07-20 16:59:26 -0700 | [diff] [blame] | 1481 | up->flags |= SUNZILOG_FLAG_IS_CONS; |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1482 | err = uart_add_one_port(&sunzilog_reg, &up[1].port); |
| 1483 | if (err) { |
| 1484 | uart_remove_one_port(&sunzilog_reg, &up[0].port); |
David S. Miller | e3a411a3 | 2006-12-28 21:01:32 -0800 | [diff] [blame] | 1485 | of_iounmap(&op->resource[0], |
| 1486 | rp, sizeof(struct zilog_layout)); |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1487 | return err; |
| 1488 | } |
Robert Reif | 227739b | 2008-04-24 03:37:51 -0700 | [diff] [blame] | 1489 | uart_inst++; |
David S. Miller | 8a84eb1 | 2006-07-19 22:55:08 -0700 | [diff] [blame] | 1490 | } else { |
David S. Miller | 4f1296a | 2007-08-25 15:17:31 -0700 | [diff] [blame] | 1491 | printk(KERN_INFO "%s: Keyboard at MMIO 0x%llx (irq = %d) " |
Mark Fortescue | 7cc5c85 | 2007-05-09 13:49:04 -0700 | [diff] [blame] | 1492 | "is a %s\n", |
Kay Sievers | 65a212d | 2009-03-24 16:38:21 -0700 | [diff] [blame] | 1493 | dev_name(&op->dev), |
David S. Miller | 4f1296a | 2007-08-25 15:17:31 -0700 | [diff] [blame] | 1494 | (unsigned long long) up[0].port.mapbase, |
| 1495 | op->irqs[0], sunzilog_type(&up[0].port)); |
| 1496 | printk(KERN_INFO "%s: Mouse at MMIO 0x%llx (irq = %d) " |
Mark Fortescue | 7cc5c85 | 2007-05-09 13:49:04 -0700 | [diff] [blame] | 1497 | "is a %s\n", |
Kay Sievers | 65a212d | 2009-03-24 16:38:21 -0700 | [diff] [blame] | 1498 | dev_name(&op->dev), |
David S. Miller | 4f1296a | 2007-08-25 15:17:31 -0700 | [diff] [blame] | 1499 | (unsigned long long) up[1].port.mapbase, |
| 1500 | op->irqs[0], sunzilog_type(&up[1].port)); |
Robert Reif | 227739b | 2008-04-24 03:37:51 -0700 | [diff] [blame] | 1501 | kbm_inst++; |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1502 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1503 | |
David S. Miller | 67e23a1 | 2006-07-17 21:07:17 -0700 | [diff] [blame] | 1504 | dev_set_drvdata(&op->dev, &up[0]); |
David S. Miller | 4fa97dc | 2006-06-29 15:13:40 -0700 | [diff] [blame] | 1505 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1506 | return 0; |
| 1507 | } |
| 1508 | |
David S. Miller | 4fa97dc | 2006-06-29 15:13:40 -0700 | [diff] [blame] | 1509 | static void __devexit zs_remove_one(struct uart_sunzilog_port *up) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1510 | { |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1511 | if (ZS_IS_KEYB(up) || ZS_IS_MOUSE(up)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1512 | #ifdef CONFIG_SERIO |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1513 | serio_unregister_port(&up->serio); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1514 | #endif |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1515 | } else |
| 1516 | uart_remove_one_port(&sunzilog_reg, &up->port); |
David S. Miller | 4fa97dc | 2006-06-29 15:13:40 -0700 | [diff] [blame] | 1517 | } |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1518 | |
David S. Miller | e3a411a3 | 2006-12-28 21:01:32 -0800 | [diff] [blame] | 1519 | static int __devexit zs_remove(struct of_device *op) |
David S. Miller | 4fa97dc | 2006-06-29 15:13:40 -0700 | [diff] [blame] | 1520 | { |
David S. Miller | e3a411a3 | 2006-12-28 21:01:32 -0800 | [diff] [blame] | 1521 | struct uart_sunzilog_port *up = dev_get_drvdata(&op->dev); |
David S. Miller | 4fa97dc | 2006-06-29 15:13:40 -0700 | [diff] [blame] | 1522 | struct zilog_layout __iomem *regs; |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1523 | |
David S. Miller | 4fa97dc | 2006-06-29 15:13:40 -0700 | [diff] [blame] | 1524 | zs_remove_one(&up[0]); |
| 1525 | zs_remove_one(&up[1]); |
| 1526 | |
| 1527 | regs = sunzilog_chip_regs[up[0].port.line / 2]; |
David S. Miller | e3a411a3 | 2006-12-28 21:01:32 -0800 | [diff] [blame] | 1528 | of_iounmap(&op->resource[0], regs, sizeof(struct zilog_layout)); |
David S. Miller | 4fa97dc | 2006-06-29 15:13:40 -0700 | [diff] [blame] | 1529 | |
David S. Miller | e3a411a3 | 2006-12-28 21:01:32 -0800 | [diff] [blame] | 1530 | dev_set_drvdata(&op->dev, NULL); |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1531 | |
| 1532 | return 0; |
| 1533 | } |
| 1534 | |
David S. Miller | fd09831 | 2008-08-31 01:23:17 -0700 | [diff] [blame] | 1535 | static const struct of_device_id zs_match[] = { |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1536 | { |
| 1537 | .name = "zs", |
| 1538 | }, |
| 1539 | {}, |
| 1540 | }; |
| 1541 | MODULE_DEVICE_TABLE(of, zs_match); |
| 1542 | |
| 1543 | static struct of_platform_driver zs_driver = { |
Grant Likely | 4018294 | 2010-04-13 16:13:02 -0700 | [diff] [blame] | 1544 | .driver = { |
| 1545 | .name = "zs", |
| 1546 | .owner = THIS_MODULE, |
| 1547 | .of_match_table = zs_match, |
| 1548 | }, |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1549 | .probe = zs_probe, |
| 1550 | .remove = __devexit_p(zs_remove), |
| 1551 | }; |
| 1552 | |
| 1553 | static int __init sunzilog_init(void) |
| 1554 | { |
| 1555 | struct device_node *dp; |
Robert Reif | 227739b | 2008-04-24 03:37:51 -0700 | [diff] [blame] | 1556 | int err; |
| 1557 | int num_keybms = 0; |
Martin Habets | 58d784a | 2007-12-11 03:37:04 -0800 | [diff] [blame] | 1558 | int num_sunzilog = 0; |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1559 | |
David S. Miller | 8a84eb1 | 2006-07-19 22:55:08 -0700 | [diff] [blame] | 1560 | for_each_node_by_name(dp, "zs") { |
Martin Habets | 58d784a | 2007-12-11 03:37:04 -0800 | [diff] [blame] | 1561 | num_sunzilog++; |
David S. Miller | 8a84eb1 | 2006-07-19 22:55:08 -0700 | [diff] [blame] | 1562 | if (of_find_property(dp, "keyboard", NULL)) |
| 1563 | num_keybms++; |
| 1564 | } |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1565 | |
Martin Habets | 58d784a | 2007-12-11 03:37:04 -0800 | [diff] [blame] | 1566 | if (num_sunzilog) { |
Martin Habets | 58d784a | 2007-12-11 03:37:04 -0800 | [diff] [blame] | 1567 | err = sunzilog_alloc_tables(num_sunzilog); |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1568 | if (err) |
David S. Miller | 67e23a1 | 2006-07-17 21:07:17 -0700 | [diff] [blame] | 1569 | goto out; |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1570 | |
Robert Reif | 227739b | 2008-04-24 03:37:51 -0700 | [diff] [blame] | 1571 | uart_chip_count = num_sunzilog - num_keybms; |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1572 | |
Robert Reif | 227739b | 2008-04-24 03:37:51 -0700 | [diff] [blame] | 1573 | err = sunserial_register_minors(&sunzilog_reg, |
| 1574 | uart_chip_count * 2); |
David S. Miller | 67e23a1 | 2006-07-17 21:07:17 -0700 | [diff] [blame] | 1575 | if (err) |
| 1576 | goto out_free_tables; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1577 | } |
| 1578 | |
David S. Miller | 67e23a1 | 2006-07-17 21:07:17 -0700 | [diff] [blame] | 1579 | err = of_register_driver(&zs_driver, &of_bus_type); |
| 1580 | if (err) |
| 1581 | goto out_unregister_uart; |
| 1582 | |
| 1583 | if (zilog_irq != -1) { |
Mark Fortescue | 7cc5c85 | 2007-05-09 13:49:04 -0700 | [diff] [blame] | 1584 | struct uart_sunzilog_port *up = sunzilog_irq_chain; |
David S. Miller | 67e23a1 | 2006-07-17 21:07:17 -0700 | [diff] [blame] | 1585 | err = request_irq(zilog_irq, sunzilog_interrupt, IRQF_SHARED, |
| 1586 | "zs", sunzilog_irq_chain); |
| 1587 | if (err) |
| 1588 | goto out_unregister_driver; |
Mark Fortescue | 7cc5c85 | 2007-05-09 13:49:04 -0700 | [diff] [blame] | 1589 | |
| 1590 | /* Enable Interrupts */ |
| 1591 | while (up) { |
| 1592 | struct zilog_channel __iomem *channel; |
| 1593 | |
| 1594 | /* printk (KERN_INFO "Enable IRQ for ZILOG Hardware %p\n", up); */ |
| 1595 | channel = ZILOG_CHANNEL_FROM_PORT(&up->port); |
| 1596 | up->flags |= SUNZILOG_FLAG_ISR_HANDLER; |
| 1597 | up->curregs[R9] |= MIE; |
| 1598 | write_zsreg(channel, R9, up->curregs[R9]); |
| 1599 | up = up->next; |
| 1600 | } |
David S. Miller | 67e23a1 | 2006-07-17 21:07:17 -0700 | [diff] [blame] | 1601 | } |
| 1602 | |
| 1603 | out: |
| 1604 | return err; |
| 1605 | |
| 1606 | out_unregister_driver: |
| 1607 | of_unregister_driver(&zs_driver); |
| 1608 | |
| 1609 | out_unregister_uart: |
Martin Habets | 58d784a | 2007-12-11 03:37:04 -0800 | [diff] [blame] | 1610 | if (num_sunzilog) { |
| 1611 | sunserial_unregister_minors(&sunzilog_reg, num_sunzilog); |
David S. Miller | 67e23a1 | 2006-07-17 21:07:17 -0700 | [diff] [blame] | 1612 | sunzilog_reg.cons = NULL; |
| 1613 | } |
| 1614 | |
| 1615 | out_free_tables: |
| 1616 | sunzilog_free_tables(); |
| 1617 | goto out; |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1618 | } |
| 1619 | |
| 1620 | static void __exit sunzilog_exit(void) |
| 1621 | { |
| 1622 | of_unregister_driver(&zs_driver); |
| 1623 | |
David S. Miller | 4fa97dc | 2006-06-29 15:13:40 -0700 | [diff] [blame] | 1624 | if (zilog_irq != -1) { |
Mark Fortescue | 7cc5c85 | 2007-05-09 13:49:04 -0700 | [diff] [blame] | 1625 | struct uart_sunzilog_port *up = sunzilog_irq_chain; |
| 1626 | |
| 1627 | /* Disable Interrupts */ |
| 1628 | while (up) { |
| 1629 | struct zilog_channel __iomem *channel; |
| 1630 | |
| 1631 | /* printk (KERN_INFO "Disable IRQ for ZILOG Hardware %p\n", up); */ |
| 1632 | channel = ZILOG_CHANNEL_FROM_PORT(&up->port); |
| 1633 | up->flags &= ~SUNZILOG_FLAG_ISR_HANDLER; |
| 1634 | up->curregs[R9] &= ~MIE; |
| 1635 | write_zsreg(channel, R9, up->curregs[R9]); |
| 1636 | up = up->next; |
| 1637 | } |
| 1638 | |
David S. Miller | 4fa97dc | 2006-06-29 15:13:40 -0700 | [diff] [blame] | 1639 | free_irq(zilog_irq, sunzilog_irq_chain); |
| 1640 | zilog_irq = -1; |
| 1641 | } |
| 1642 | |
Martin Habets | 58d784a | 2007-12-11 03:37:04 -0800 | [diff] [blame] | 1643 | if (sunzilog_reg.nr) { |
| 1644 | sunserial_unregister_minors(&sunzilog_reg, sunzilog_reg.nr); |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1645 | sunzilog_free_tables(); |
| 1646 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1647 | } |
| 1648 | |
| 1649 | module_init(sunzilog_init); |
| 1650 | module_exit(sunzilog_exit); |
| 1651 | |
| 1652 | MODULE_AUTHOR("David S. Miller"); |
| 1653 | MODULE_DESCRIPTION("Sun Zilog serial port driver"); |
David S. Miller | 9efc371 | 2006-06-29 15:14:17 -0700 | [diff] [blame] | 1654 | MODULE_VERSION("2.0"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1655 | MODULE_LICENSE("GPL"); |