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> |
David Howells | d550bbd | 2012-03-28 18:30:03 +0100 | [diff] [blame] | 40 | #include <asm/setup.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | |
| 42 | #if defined(CONFIG_SERIAL_SUNZILOG_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) |
| 43 | #define SUPPORT_SYSRQ |
| 44 | #endif |
| 45 | |
| 46 | #include <linux/serial_core.h> |
Paul Gortmaker | 6816383 | 2012-02-09 18:48:19 -0500 | [diff] [blame] | 47 | #include <linux/sunserialcore.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | #include "sunzilog.h" |
| 50 | |
| 51 | /* On 32-bit sparcs we need to delay after register accesses |
| 52 | * to accommodate sun4 systems, but we do not need to flush writes. |
| 53 | * On 64-bit sparc we only need to flush single writes to ensure |
| 54 | * completion. |
| 55 | */ |
| 56 | #ifndef CONFIG_SPARC64 |
| 57 | #define ZSDELAY() udelay(5) |
| 58 | #define ZSDELAY_LONG() udelay(20) |
| 59 | #define ZS_WSYNC(channel) do { } while (0) |
| 60 | #else |
| 61 | #define ZSDELAY() |
| 62 | #define ZSDELAY_LONG() |
| 63 | #define ZS_WSYNC(__channel) \ |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 64 | readb(&((__channel)->control)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | #endif |
| 66 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | #define ZS_CLOCK 4915200 /* Zilog input clock rate. */ |
| 68 | #define ZS_CLOCK_DIVISOR 16 /* Divisor this driver uses. */ |
| 69 | |
| 70 | /* |
| 71 | * We wrap our port structure around the generic uart_port. |
| 72 | */ |
| 73 | struct uart_sunzilog_port { |
| 74 | struct uart_port port; |
| 75 | |
| 76 | /* IRQ servicing chain. */ |
| 77 | struct uart_sunzilog_port *next; |
| 78 | |
| 79 | /* Current values of Zilog write registers. */ |
| 80 | unsigned char curregs[NUM_ZSREGS]; |
| 81 | |
| 82 | unsigned int flags; |
| 83 | #define SUNZILOG_FLAG_CONS_KEYB 0x00000001 |
| 84 | #define SUNZILOG_FLAG_CONS_MOUSE 0x00000002 |
| 85 | #define SUNZILOG_FLAG_IS_CONS 0x00000004 |
| 86 | #define SUNZILOG_FLAG_IS_KGDB 0x00000008 |
| 87 | #define SUNZILOG_FLAG_MODEM_STATUS 0x00000010 |
| 88 | #define SUNZILOG_FLAG_IS_CHANNEL_A 0x00000020 |
| 89 | #define SUNZILOG_FLAG_REGS_HELD 0x00000040 |
| 90 | #define SUNZILOG_FLAG_TX_STOPPED 0x00000080 |
| 91 | #define SUNZILOG_FLAG_TX_ACTIVE 0x00000100 |
Mark Fortescue | 7cc5c85 | 2007-05-09 13:49:04 -0700 | [diff] [blame] | 92 | #define SUNZILOG_FLAG_ESCC 0x00000200 |
| 93 | #define SUNZILOG_FLAG_ISR_HANDLER 0x00000400 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | |
| 95 | unsigned int cflag; |
| 96 | |
| 97 | unsigned char parity_mask; |
| 98 | unsigned char prev_status; |
| 99 | |
| 100 | #ifdef CONFIG_SERIO |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 101 | struct serio serio; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | int serio_open; |
| 103 | #endif |
| 104 | }; |
| 105 | |
Jason Wessel | 6d45a1a | 2010-05-20 21:04:23 -0500 | [diff] [blame] | 106 | static void sunzilog_putchar(struct uart_port *port, int ch); |
| 107 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 108 | #define ZILOG_CHANNEL_FROM_PORT(PORT) ((struct zilog_channel __iomem *)((PORT)->membase)) |
| 109 | #define UART_ZILOG(PORT) ((struct uart_sunzilog_port *)(PORT)) |
| 110 | |
| 111 | #define ZS_IS_KEYB(UP) ((UP)->flags & SUNZILOG_FLAG_CONS_KEYB) |
| 112 | #define ZS_IS_MOUSE(UP) ((UP)->flags & SUNZILOG_FLAG_CONS_MOUSE) |
| 113 | #define ZS_IS_CONS(UP) ((UP)->flags & SUNZILOG_FLAG_IS_CONS) |
| 114 | #define ZS_IS_KGDB(UP) ((UP)->flags & SUNZILOG_FLAG_IS_KGDB) |
| 115 | #define ZS_WANTS_MODEM_STATUS(UP) ((UP)->flags & SUNZILOG_FLAG_MODEM_STATUS) |
| 116 | #define ZS_IS_CHANNEL_A(UP) ((UP)->flags & SUNZILOG_FLAG_IS_CHANNEL_A) |
| 117 | #define ZS_REGS_HELD(UP) ((UP)->flags & SUNZILOG_FLAG_REGS_HELD) |
| 118 | #define ZS_TX_STOPPED(UP) ((UP)->flags & SUNZILOG_FLAG_TX_STOPPED) |
| 119 | #define ZS_TX_ACTIVE(UP) ((UP)->flags & SUNZILOG_FLAG_TX_ACTIVE) |
| 120 | |
| 121 | /* Reading and writing Zilog8530 registers. The delays are to make this |
| 122 | * driver work on the Sun4 which needs a settling delay after each chip |
| 123 | * register access, other machines handle this in hardware via auxiliary |
| 124 | * flip-flops which implement the settle time we do in software. |
| 125 | * |
| 126 | * The port lock must be held and local IRQs must be disabled |
| 127 | * when {read,write}_zsreg is invoked. |
| 128 | */ |
| 129 | static unsigned char read_zsreg(struct zilog_channel __iomem *channel, |
| 130 | unsigned char reg) |
| 131 | { |
| 132 | unsigned char retval; |
| 133 | |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 134 | writeb(reg, &channel->control); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 135 | ZSDELAY(); |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 136 | retval = readb(&channel->control); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | ZSDELAY(); |
| 138 | |
| 139 | return retval; |
| 140 | } |
| 141 | |
| 142 | static void write_zsreg(struct zilog_channel __iomem *channel, |
| 143 | unsigned char reg, unsigned char value) |
| 144 | { |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 145 | writeb(reg, &channel->control); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | ZSDELAY(); |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 147 | writeb(value, &channel->control); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | ZSDELAY(); |
| 149 | } |
| 150 | |
| 151 | static void sunzilog_clear_fifo(struct zilog_channel __iomem *channel) |
| 152 | { |
| 153 | int i; |
| 154 | |
| 155 | for (i = 0; i < 32; i++) { |
| 156 | unsigned char regval; |
| 157 | |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 158 | regval = readb(&channel->control); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | ZSDELAY(); |
| 160 | if (regval & Rx_CH_AV) |
| 161 | break; |
| 162 | |
| 163 | regval = read_zsreg(channel, R1); |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 164 | readb(&channel->data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | ZSDELAY(); |
| 166 | |
| 167 | if (regval & (PAR_ERR | Rx_OVR | CRC_ERR)) { |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 168 | writeb(ERR_RES, &channel->control); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | ZSDELAY(); |
| 170 | ZS_WSYNC(channel); |
| 171 | } |
| 172 | } |
| 173 | } |
| 174 | |
| 175 | /* This function must only be called when the TX is not busy. The UART |
| 176 | * port lock must be held and local interrupts disabled. |
| 177 | */ |
Mark Fortescue | 7cc5c85 | 2007-05-09 13:49:04 -0700 | [diff] [blame] | 178 | static int __load_zsregs(struct zilog_channel __iomem *channel, unsigned char *regs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | { |
| 180 | int i; |
Mark Fortescue | 7cc5c85 | 2007-05-09 13:49:04 -0700 | [diff] [blame] | 181 | int escc; |
| 182 | unsigned char r15; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 183 | |
| 184 | /* Let pending transmits finish. */ |
| 185 | for (i = 0; i < 1000; i++) { |
| 186 | unsigned char stat = read_zsreg(channel, R1); |
| 187 | if (stat & ALL_SNT) |
| 188 | break; |
| 189 | udelay(100); |
| 190 | } |
| 191 | |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 192 | writeb(ERR_RES, &channel->control); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | ZSDELAY(); |
| 194 | ZS_WSYNC(channel); |
| 195 | |
| 196 | sunzilog_clear_fifo(channel); |
| 197 | |
| 198 | /* Disable all interrupts. */ |
| 199 | write_zsreg(channel, R1, |
| 200 | regs[R1] & ~(RxINT_MASK | TxINT_ENAB | EXT_INT_ENAB)); |
| 201 | |
| 202 | /* Set parity, sync config, stop bits, and clock divisor. */ |
| 203 | write_zsreg(channel, R4, regs[R4]); |
| 204 | |
| 205 | /* Set misc. TX/RX control bits. */ |
| 206 | write_zsreg(channel, R10, regs[R10]); |
| 207 | |
| 208 | /* Set TX/RX controls sans the enable bits. */ |
| 209 | write_zsreg(channel, R3, regs[R3] & ~RxENAB); |
| 210 | write_zsreg(channel, R5, regs[R5] & ~TxENAB); |
| 211 | |
| 212 | /* Synchronous mode config. */ |
| 213 | write_zsreg(channel, R6, regs[R6]); |
| 214 | write_zsreg(channel, R7, regs[R7]); |
| 215 | |
| 216 | /* Don't mess with the interrupt vector (R2, unused by us) and |
| 217 | * master interrupt control (R9). We make sure this is setup |
| 218 | * properly at probe time then never touch it again. |
| 219 | */ |
| 220 | |
| 221 | /* Disable baud generator. */ |
| 222 | write_zsreg(channel, R14, regs[R14] & ~BRENAB); |
| 223 | |
| 224 | /* Clock mode control. */ |
| 225 | write_zsreg(channel, R11, regs[R11]); |
| 226 | |
| 227 | /* Lower and upper byte of baud rate generator divisor. */ |
| 228 | write_zsreg(channel, R12, regs[R12]); |
| 229 | write_zsreg(channel, R13, regs[R13]); |
| 230 | |
| 231 | /* Now rewrite R14, with BRENAB (if set). */ |
| 232 | write_zsreg(channel, R14, regs[R14]); |
| 233 | |
| 234 | /* External status interrupt control. */ |
Mark Fortescue | 7cc5c85 | 2007-05-09 13:49:04 -0700 | [diff] [blame] | 235 | write_zsreg(channel, R15, (regs[R15] | WR7pEN) & ~FIFOEN); |
| 236 | |
| 237 | /* ESCC Extension Register */ |
| 238 | r15 = read_zsreg(channel, R15); |
| 239 | if (r15 & 0x01) { |
| 240 | write_zsreg(channel, R7, regs[R7p]); |
| 241 | |
| 242 | /* External status interrupt and FIFO control. */ |
| 243 | write_zsreg(channel, R15, regs[R15] & ~WR7pEN); |
| 244 | escc = 1; |
| 245 | } else { |
| 246 | /* Clear FIFO bit case it is an issue */ |
| 247 | regs[R15] &= ~FIFOEN; |
| 248 | escc = 0; |
| 249 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 250 | |
| 251 | /* Reset external status interrupts. */ |
Mark Fortescue | 7cc5c85 | 2007-05-09 13:49:04 -0700 | [diff] [blame] | 252 | write_zsreg(channel, R0, RES_EXT_INT); /* First Latch */ |
| 253 | write_zsreg(channel, R0, RES_EXT_INT); /* Second Latch */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | |
| 255 | /* Rewrite R3/R5, this time without enables masked. */ |
| 256 | write_zsreg(channel, R3, regs[R3]); |
| 257 | write_zsreg(channel, R5, regs[R5]); |
| 258 | |
| 259 | /* Rewrite R1, this time without IRQ enabled masked. */ |
| 260 | write_zsreg(channel, R1, regs[R1]); |
Mark Fortescue | 7cc5c85 | 2007-05-09 13:49:04 -0700 | [diff] [blame] | 261 | |
| 262 | return escc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 263 | } |
| 264 | |
| 265 | /* Reprogram the Zilog channel HW registers with the copies found in the |
| 266 | * software state struct. If the transmitter is busy, we defer this update |
| 267 | * until the next TX complete interrupt. Else, we do it right now. |
| 268 | * |
| 269 | * The UART port lock must be held and local interrupts disabled. |
| 270 | */ |
| 271 | static void sunzilog_maybe_update_regs(struct uart_sunzilog_port *up, |
| 272 | struct zilog_channel __iomem *channel) |
| 273 | { |
| 274 | if (!ZS_REGS_HELD(up)) { |
| 275 | if (ZS_TX_ACTIVE(up)) { |
| 276 | up->flags |= SUNZILOG_FLAG_REGS_HELD; |
| 277 | } else { |
| 278 | __load_zsregs(channel, up->curregs); |
| 279 | } |
| 280 | } |
| 281 | } |
| 282 | |
| 283 | static void sunzilog_change_mouse_baud(struct uart_sunzilog_port *up) |
| 284 | { |
| 285 | unsigned int cur_cflag = up->cflag; |
| 286 | int brg, new_baud; |
| 287 | |
| 288 | up->cflag &= ~CBAUD; |
| 289 | up->cflag |= suncore_mouse_baud_cflag_next(cur_cflag, &new_baud); |
| 290 | |
| 291 | brg = BPS_TO_BRG(new_baud, ZS_CLOCK / ZS_CLOCK_DIVISOR); |
| 292 | up->curregs[R12] = (brg & 0xff); |
| 293 | up->curregs[R13] = (brg >> 8) & 0xff; |
| 294 | sunzilog_maybe_update_regs(up, ZILOG_CHANNEL_FROM_PORT(&up->port)); |
| 295 | } |
| 296 | |
| 297 | static void sunzilog_kbdms_receive_chars(struct uart_sunzilog_port *up, |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 298 | unsigned char ch, int is_break) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 299 | { |
| 300 | if (ZS_IS_KEYB(up)) { |
| 301 | /* Stop-A is handled by drivers/char/keyboard.c now. */ |
| 302 | #ifdef CONFIG_SERIO |
| 303 | if (up->serio_open) |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 304 | serio_interrupt(&up->serio, ch, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | #endif |
| 306 | } else if (ZS_IS_MOUSE(up)) { |
| 307 | int ret = suncore_mouse_baud_detection(ch, is_break); |
| 308 | |
| 309 | switch (ret) { |
| 310 | case 2: |
| 311 | sunzilog_change_mouse_baud(up); |
| 312 | /* fallthru */ |
| 313 | case 1: |
| 314 | break; |
| 315 | |
| 316 | case 0: |
| 317 | #ifdef CONFIG_SERIO |
| 318 | if (up->serio_open) |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 319 | serio_interrupt(&up->serio, ch, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | #endif |
| 321 | break; |
| 322 | }; |
| 323 | } |
| 324 | } |
| 325 | |
Jiri Slaby | 2e124b4 | 2013-01-03 15:53:06 +0100 | [diff] [blame] | 326 | static struct tty_port * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 327 | sunzilog_receive_chars(struct uart_sunzilog_port *up, |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 328 | struct zilog_channel __iomem *channel) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 329 | { |
Jiri Slaby | 92a19f9 | 2013-01-03 15:53:03 +0100 | [diff] [blame] | 330 | struct tty_port *port = NULL; |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 331 | unsigned char ch, r1, flag; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 332 | |
Jiri Slaby | 2e124b4 | 2013-01-03 15:53:06 +0100 | [diff] [blame] | 333 | if (up->port.state != NULL) /* Unopened serial console */ |
Jiri Slaby | 92a19f9 | 2013-01-03 15:53:03 +0100 | [diff] [blame] | 334 | port = &up->port.state->port; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 335 | |
| 336 | for (;;) { |
| 337 | |
| 338 | r1 = read_zsreg(channel, R1); |
| 339 | if (r1 & (PAR_ERR | Rx_OVR | CRC_ERR)) { |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 340 | writeb(ERR_RES, &channel->control); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 341 | ZSDELAY(); |
| 342 | ZS_WSYNC(channel); |
| 343 | } |
| 344 | |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 345 | ch = readb(&channel->control); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | ZSDELAY(); |
| 347 | |
| 348 | /* This funny hack depends upon BRK_ABRT not interfering |
| 349 | * with the other bits we care about in R1. |
| 350 | */ |
| 351 | if (ch & BRK_ABRT) |
| 352 | r1 |= BRK_ABRT; |
| 353 | |
| 354 | if (!(ch & Rx_CH_AV)) |
| 355 | break; |
| 356 | |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 357 | ch = readb(&channel->data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 358 | ZSDELAY(); |
| 359 | |
| 360 | ch &= up->parity_mask; |
| 361 | |
| 362 | if (unlikely(ZS_IS_KEYB(up)) || unlikely(ZS_IS_MOUSE(up))) { |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 363 | sunzilog_kbdms_receive_chars(up, ch, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | continue; |
| 365 | } |
| 366 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | /* A real serial line, record the character and status. */ |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 368 | flag = TTY_NORMAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 369 | up->port.icount.rx++; |
| 370 | if (r1 & (BRK_ABRT | PAR_ERR | Rx_OVR | CRC_ERR)) { |
| 371 | if (r1 & BRK_ABRT) { |
| 372 | r1 &= ~(PAR_ERR | CRC_ERR); |
| 373 | up->port.icount.brk++; |
| 374 | if (uart_handle_break(&up->port)) |
| 375 | continue; |
| 376 | } |
| 377 | else if (r1 & PAR_ERR) |
| 378 | up->port.icount.parity++; |
| 379 | else if (r1 & CRC_ERR) |
| 380 | up->port.icount.frame++; |
| 381 | if (r1 & Rx_OVR) |
| 382 | up->port.icount.overrun++; |
| 383 | r1 &= up->port.read_status_mask; |
| 384 | if (r1 & BRK_ABRT) |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 385 | flag = TTY_BREAK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | else if (r1 & PAR_ERR) |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 387 | flag = TTY_PARITY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 388 | else if (r1 & CRC_ERR) |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 389 | flag = TTY_FRAME; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 390 | } |
Jiri Slaby | 7bbe08d | 2013-03-14 00:30:34 +0100 | [diff] [blame] | 391 | if (uart_handle_sysrq_char(&up->port, ch) || !port) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 392 | continue; |
| 393 | |
| 394 | if (up->port.ignore_status_mask == 0xff || |
| 395 | (r1 & up->port.ignore_status_mask) == 0) { |
Jiri Slaby | 92a19f9 | 2013-01-03 15:53:03 +0100 | [diff] [blame] | 396 | tty_insert_flip_char(port, ch, flag); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 397 | } |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 398 | if (r1 & Rx_OVR) |
Jiri Slaby | 92a19f9 | 2013-01-03 15:53:03 +0100 | [diff] [blame] | 399 | tty_insert_flip_char(port, 0, TTY_OVERRUN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 400 | } |
| 401 | |
Jiri Slaby | 2e124b4 | 2013-01-03 15:53:06 +0100 | [diff] [blame] | 402 | return port; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 403 | } |
| 404 | |
| 405 | static void sunzilog_status_handle(struct uart_sunzilog_port *up, |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 406 | struct zilog_channel __iomem *channel) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 407 | { |
| 408 | unsigned char status; |
| 409 | |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 410 | status = readb(&channel->control); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | ZSDELAY(); |
| 412 | |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 413 | writeb(RES_EXT_INT, &channel->control); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 414 | ZSDELAY(); |
| 415 | ZS_WSYNC(channel); |
| 416 | |
| 417 | if (status & BRK_ABRT) { |
| 418 | if (ZS_IS_MOUSE(up)) |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 419 | sunzilog_kbdms_receive_chars(up, 0, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 420 | if (ZS_IS_CONS(up)) { |
| 421 | /* Wait for BREAK to deassert to avoid potentially |
| 422 | * confusing the PROM. |
| 423 | */ |
| 424 | while (1) { |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 425 | status = readb(&channel->control); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 426 | ZSDELAY(); |
| 427 | if (!(status & BRK_ABRT)) |
| 428 | break; |
| 429 | } |
| 430 | sun_do_break(); |
| 431 | return; |
| 432 | } |
| 433 | } |
| 434 | |
| 435 | if (ZS_WANTS_MODEM_STATUS(up)) { |
| 436 | if (status & SYNC) |
| 437 | up->port.icount.dsr++; |
| 438 | |
| 439 | /* The Zilog just gives us an interrupt when DCD/CTS/etc. change. |
| 440 | * But it does not tell us which bit has changed, we have to keep |
| 441 | * track of this ourselves. |
| 442 | */ |
| 443 | if ((status ^ up->prev_status) ^ DCD) |
| 444 | uart_handle_dcd_change(&up->port, |
| 445 | (status & DCD)); |
| 446 | if ((status ^ up->prev_status) ^ CTS) |
| 447 | uart_handle_cts_change(&up->port, |
| 448 | (status & CTS)); |
| 449 | |
Alan Cox | bdc04e3 | 2009-09-19 13:13:31 -0700 | [diff] [blame] | 450 | wake_up_interruptible(&up->port.state->port.delta_msr_wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 451 | } |
| 452 | |
| 453 | up->prev_status = status; |
| 454 | } |
| 455 | |
| 456 | static void sunzilog_transmit_chars(struct uart_sunzilog_port *up, |
| 457 | struct zilog_channel __iomem *channel) |
| 458 | { |
| 459 | struct circ_buf *xmit; |
| 460 | |
| 461 | if (ZS_IS_CONS(up)) { |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 462 | unsigned char status = readb(&channel->control); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 463 | ZSDELAY(); |
| 464 | |
| 465 | /* TX still busy? Just wait for the next TX done interrupt. |
| 466 | * |
| 467 | * It can occur because of how we do serial console writes. It would |
| 468 | * be nice to transmit console writes just like we normally would for |
| 469 | * a TTY line. (ie. buffered and TX interrupt driven). That is not |
| 470 | * easy because console writes cannot sleep. One solution might be |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 471 | * to poll on enough port->xmit space becoming free. -DaveM |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 472 | */ |
| 473 | if (!(status & Tx_BUF_EMP)) |
| 474 | return; |
| 475 | } |
| 476 | |
| 477 | up->flags &= ~SUNZILOG_FLAG_TX_ACTIVE; |
| 478 | |
| 479 | if (ZS_REGS_HELD(up)) { |
| 480 | __load_zsregs(channel, up->curregs); |
| 481 | up->flags &= ~SUNZILOG_FLAG_REGS_HELD; |
| 482 | } |
| 483 | |
| 484 | if (ZS_TX_STOPPED(up)) { |
| 485 | up->flags &= ~SUNZILOG_FLAG_TX_STOPPED; |
| 486 | goto ack_tx_int; |
| 487 | } |
| 488 | |
| 489 | if (up->port.x_char) { |
| 490 | up->flags |= SUNZILOG_FLAG_TX_ACTIVE; |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 491 | writeb(up->port.x_char, &channel->data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 492 | ZSDELAY(); |
| 493 | ZS_WSYNC(channel); |
| 494 | |
| 495 | up->port.icount.tx++; |
| 496 | up->port.x_char = 0; |
| 497 | return; |
| 498 | } |
| 499 | |
Alan Cox | ebd2c8f | 2009-09-19 13:13:28 -0700 | [diff] [blame] | 500 | if (up->port.state == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 501 | goto ack_tx_int; |
Alan Cox | ebd2c8f | 2009-09-19 13:13:28 -0700 | [diff] [blame] | 502 | xmit = &up->port.state->xmit; |
David S. Miller | b8df110 | 2005-10-10 20:43:22 -0700 | [diff] [blame] | 503 | if (uart_circ_empty(xmit)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 504 | goto ack_tx_int; |
David S. Miller | b8df110 | 2005-10-10 20:43:22 -0700 | [diff] [blame] | 505 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 506 | if (uart_tx_stopped(&up->port)) |
| 507 | goto ack_tx_int; |
| 508 | |
| 509 | up->flags |= SUNZILOG_FLAG_TX_ACTIVE; |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 510 | writeb(xmit->buf[xmit->tail], &channel->data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 511 | ZSDELAY(); |
| 512 | ZS_WSYNC(channel); |
| 513 | |
| 514 | xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); |
| 515 | up->port.icount.tx++; |
| 516 | |
| 517 | if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) |
| 518 | uart_write_wakeup(&up->port); |
| 519 | |
| 520 | return; |
| 521 | |
| 522 | ack_tx_int: |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 523 | writeb(RES_Tx_P, &channel->control); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 524 | ZSDELAY(); |
| 525 | ZS_WSYNC(channel); |
| 526 | } |
| 527 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 528 | static irqreturn_t sunzilog_interrupt(int irq, void *dev_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 529 | { |
| 530 | struct uart_sunzilog_port *up = dev_id; |
| 531 | |
| 532 | while (up) { |
| 533 | struct zilog_channel __iomem *channel |
| 534 | = ZILOG_CHANNEL_FROM_PORT(&up->port); |
Jiri Slaby | 2e124b4 | 2013-01-03 15:53:06 +0100 | [diff] [blame] | 535 | struct tty_port *port; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 536 | unsigned char r3; |
| 537 | |
| 538 | spin_lock(&up->port.lock); |
| 539 | r3 = read_zsreg(channel, R3); |
| 540 | |
| 541 | /* Channel A */ |
Jiri Slaby | 2e124b4 | 2013-01-03 15:53:06 +0100 | [diff] [blame] | 542 | port = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 543 | if (r3 & (CHAEXT | CHATxIP | CHARxIP)) { |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 544 | writeb(RES_H_IUS, &channel->control); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 545 | ZSDELAY(); |
| 546 | ZS_WSYNC(channel); |
| 547 | |
| 548 | if (r3 & CHARxIP) |
Jiri Slaby | 2e124b4 | 2013-01-03 15:53:06 +0100 | [diff] [blame] | 549 | port = sunzilog_receive_chars(up, channel); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 550 | if (r3 & CHAEXT) |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 551 | sunzilog_status_handle(up, channel); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 552 | if (r3 & CHATxIP) |
| 553 | sunzilog_transmit_chars(up, channel); |
| 554 | } |
| 555 | spin_unlock(&up->port.lock); |
| 556 | |
Jiri Slaby | 2e124b4 | 2013-01-03 15:53:06 +0100 | [diff] [blame] | 557 | if (port) |
| 558 | tty_flip_buffer_push(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | |
| 560 | /* Channel B */ |
| 561 | up = up->next; |
| 562 | channel = ZILOG_CHANNEL_FROM_PORT(&up->port); |
| 563 | |
| 564 | spin_lock(&up->port.lock); |
Jiri Slaby | 2e124b4 | 2013-01-03 15:53:06 +0100 | [diff] [blame] | 565 | port = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 566 | if (r3 & (CHBEXT | CHBTxIP | CHBRxIP)) { |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 567 | writeb(RES_H_IUS, &channel->control); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 568 | ZSDELAY(); |
| 569 | ZS_WSYNC(channel); |
| 570 | |
| 571 | if (r3 & CHBRxIP) |
Jiri Slaby | 2e124b4 | 2013-01-03 15:53:06 +0100 | [diff] [blame] | 572 | port = sunzilog_receive_chars(up, channel); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 573 | if (r3 & CHBEXT) |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 574 | sunzilog_status_handle(up, channel); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 575 | if (r3 & CHBTxIP) |
| 576 | sunzilog_transmit_chars(up, channel); |
| 577 | } |
| 578 | spin_unlock(&up->port.lock); |
| 579 | |
Jiri Slaby | 2e124b4 | 2013-01-03 15:53:06 +0100 | [diff] [blame] | 580 | if (port) |
| 581 | tty_flip_buffer_push(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 582 | |
| 583 | up = up->next; |
| 584 | } |
| 585 | |
| 586 | return IRQ_HANDLED; |
| 587 | } |
| 588 | |
| 589 | /* A convenient way to quickly get R0 status. The caller must _not_ hold the |
| 590 | * port lock, it is acquired here. |
| 591 | */ |
| 592 | static __inline__ unsigned char sunzilog_read_channel_status(struct uart_port *port) |
| 593 | { |
| 594 | struct zilog_channel __iomem *channel; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 595 | unsigned char status; |
| 596 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 597 | channel = ZILOG_CHANNEL_FROM_PORT(port); |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 598 | status = readb(&channel->control); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 599 | ZSDELAY(); |
| 600 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 601 | return status; |
| 602 | } |
| 603 | |
| 604 | /* The port lock is not held. */ |
| 605 | static unsigned int sunzilog_tx_empty(struct uart_port *port) |
| 606 | { |
Russell King | c5f4644 | 2005-06-29 09:42:38 +0100 | [diff] [blame] | 607 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 608 | unsigned char status; |
| 609 | unsigned int ret; |
| 610 | |
Russell King | c5f4644 | 2005-06-29 09:42:38 +0100 | [diff] [blame] | 611 | spin_lock_irqsave(&port->lock, flags); |
| 612 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 613 | status = sunzilog_read_channel_status(port); |
Russell King | c5f4644 | 2005-06-29 09:42:38 +0100 | [diff] [blame] | 614 | |
| 615 | spin_unlock_irqrestore(&port->lock, flags); |
| 616 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 617 | if (status & Tx_BUF_EMP) |
| 618 | ret = TIOCSER_TEMT; |
| 619 | else |
| 620 | ret = 0; |
| 621 | |
| 622 | return ret; |
| 623 | } |
| 624 | |
Russell King | c5f4644 | 2005-06-29 09:42:38 +0100 | [diff] [blame] | 625 | /* The port lock is held and interrupts are disabled. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 626 | static unsigned int sunzilog_get_mctrl(struct uart_port *port) |
| 627 | { |
| 628 | unsigned char status; |
| 629 | unsigned int ret; |
| 630 | |
| 631 | status = sunzilog_read_channel_status(port); |
| 632 | |
| 633 | ret = 0; |
| 634 | if (status & DCD) |
| 635 | ret |= TIOCM_CAR; |
| 636 | if (status & SYNC) |
| 637 | ret |= TIOCM_DSR; |
| 638 | if (status & CTS) |
| 639 | ret |= TIOCM_CTS; |
| 640 | |
| 641 | return ret; |
| 642 | } |
| 643 | |
| 644 | /* The port lock is held and interrupts are disabled. */ |
| 645 | static void sunzilog_set_mctrl(struct uart_port *port, unsigned int mctrl) |
| 646 | { |
| 647 | struct uart_sunzilog_port *up = (struct uart_sunzilog_port *) port; |
| 648 | struct zilog_channel __iomem *channel = ZILOG_CHANNEL_FROM_PORT(port); |
| 649 | unsigned char set_bits, clear_bits; |
| 650 | |
| 651 | set_bits = clear_bits = 0; |
| 652 | |
| 653 | if (mctrl & TIOCM_RTS) |
| 654 | set_bits |= RTS; |
| 655 | else |
| 656 | clear_bits |= RTS; |
| 657 | if (mctrl & TIOCM_DTR) |
| 658 | set_bits |= DTR; |
| 659 | else |
| 660 | clear_bits |= DTR; |
| 661 | |
| 662 | /* NOTE: Not subject to 'transmitter active' rule. */ |
| 663 | up->curregs[R5] |= set_bits; |
| 664 | up->curregs[R5] &= ~clear_bits; |
| 665 | write_zsreg(channel, R5, up->curregs[R5]); |
| 666 | } |
| 667 | |
| 668 | /* The port lock is held and interrupts are disabled. */ |
Russell King | b129a8c | 2005-08-31 10:12:14 +0100 | [diff] [blame] | 669 | static void sunzilog_stop_tx(struct uart_port *port) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 670 | { |
| 671 | struct uart_sunzilog_port *up = (struct uart_sunzilog_port *) port; |
| 672 | |
| 673 | up->flags |= SUNZILOG_FLAG_TX_STOPPED; |
| 674 | } |
| 675 | |
| 676 | /* The port lock is held and interrupts are disabled. */ |
Russell King | b129a8c | 2005-08-31 10:12:14 +0100 | [diff] [blame] | 677 | static void sunzilog_start_tx(struct uart_port *port) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 678 | { |
| 679 | struct uart_sunzilog_port *up = (struct uart_sunzilog_port *) port; |
| 680 | struct zilog_channel __iomem *channel = ZILOG_CHANNEL_FROM_PORT(port); |
| 681 | unsigned char status; |
| 682 | |
| 683 | up->flags |= SUNZILOG_FLAG_TX_ACTIVE; |
| 684 | up->flags &= ~SUNZILOG_FLAG_TX_STOPPED; |
| 685 | |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 686 | status = readb(&channel->control); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 687 | ZSDELAY(); |
| 688 | |
| 689 | /* TX busy? Just wait for the TX done interrupt. */ |
| 690 | if (!(status & Tx_BUF_EMP)) |
| 691 | return; |
| 692 | |
| 693 | /* Send the first character to jump-start the TX done |
| 694 | * IRQ sending engine. |
| 695 | */ |
| 696 | if (port->x_char) { |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 697 | writeb(port->x_char, &channel->data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 698 | ZSDELAY(); |
| 699 | ZS_WSYNC(channel); |
| 700 | |
| 701 | port->icount.tx++; |
| 702 | port->x_char = 0; |
| 703 | } else { |
Alan Cox | ebd2c8f | 2009-09-19 13:13:28 -0700 | [diff] [blame] | 704 | struct circ_buf *xmit = &port->state->xmit; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 705 | |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 706 | writeb(xmit->buf[xmit->tail], &channel->data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 707 | ZSDELAY(); |
| 708 | ZS_WSYNC(channel); |
| 709 | |
| 710 | xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); |
| 711 | port->icount.tx++; |
| 712 | |
| 713 | if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) |
| 714 | uart_write_wakeup(&up->port); |
| 715 | } |
| 716 | } |
| 717 | |
| 718 | /* The port lock is held. */ |
| 719 | static void sunzilog_stop_rx(struct uart_port *port) |
| 720 | { |
| 721 | struct uart_sunzilog_port *up = UART_ZILOG(port); |
| 722 | struct zilog_channel __iomem *channel; |
| 723 | |
| 724 | if (ZS_IS_CONS(up)) |
| 725 | return; |
| 726 | |
| 727 | channel = ZILOG_CHANNEL_FROM_PORT(port); |
| 728 | |
| 729 | /* Disable all RX interrupts. */ |
| 730 | up->curregs[R1] &= ~RxINT_MASK; |
| 731 | sunzilog_maybe_update_regs(up, channel); |
| 732 | } |
| 733 | |
| 734 | /* The port lock is held. */ |
| 735 | static void sunzilog_enable_ms(struct uart_port *port) |
| 736 | { |
| 737 | struct uart_sunzilog_port *up = (struct uart_sunzilog_port *) port; |
| 738 | struct zilog_channel __iomem *channel = ZILOG_CHANNEL_FROM_PORT(port); |
| 739 | unsigned char new_reg; |
| 740 | |
| 741 | new_reg = up->curregs[R15] | (DCDIE | SYNCIE | CTSIE); |
| 742 | if (new_reg != up->curregs[R15]) { |
| 743 | up->curregs[R15] = new_reg; |
| 744 | |
| 745 | /* NOTE: Not subject to 'transmitter active' rule. */ |
Mark Fortescue | 7cc5c85 | 2007-05-09 13:49:04 -0700 | [diff] [blame] | 746 | write_zsreg(channel, R15, up->curregs[R15] & ~WR7pEN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 747 | } |
| 748 | } |
| 749 | |
| 750 | /* The port lock is not held. */ |
| 751 | static void sunzilog_break_ctl(struct uart_port *port, int break_state) |
| 752 | { |
| 753 | struct uart_sunzilog_port *up = (struct uart_sunzilog_port *) port; |
| 754 | struct zilog_channel __iomem *channel = ZILOG_CHANNEL_FROM_PORT(port); |
| 755 | unsigned char set_bits, clear_bits, new_reg; |
| 756 | unsigned long flags; |
| 757 | |
| 758 | set_bits = clear_bits = 0; |
| 759 | |
| 760 | if (break_state) |
| 761 | set_bits |= SND_BRK; |
| 762 | else |
| 763 | clear_bits |= SND_BRK; |
| 764 | |
| 765 | spin_lock_irqsave(&port->lock, flags); |
| 766 | |
| 767 | new_reg = (up->curregs[R5] | set_bits) & ~clear_bits; |
| 768 | if (new_reg != up->curregs[R5]) { |
| 769 | up->curregs[R5] = new_reg; |
| 770 | |
| 771 | /* NOTE: Not subject to 'transmitter active' rule. */ |
| 772 | write_zsreg(channel, R5, up->curregs[R5]); |
| 773 | } |
| 774 | |
| 775 | spin_unlock_irqrestore(&port->lock, flags); |
| 776 | } |
| 777 | |
| 778 | static void __sunzilog_startup(struct uart_sunzilog_port *up) |
| 779 | { |
| 780 | struct zilog_channel __iomem *channel; |
| 781 | |
| 782 | channel = ZILOG_CHANNEL_FROM_PORT(&up->port); |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 783 | up->prev_status = readb(&channel->control); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 784 | |
| 785 | /* Enable receiver and transmitter. */ |
| 786 | up->curregs[R3] |= RxENAB; |
| 787 | up->curregs[R5] |= TxENAB; |
| 788 | |
| 789 | up->curregs[R1] |= EXT_INT_ENAB | INT_ALL_Rx | TxINT_ENAB; |
| 790 | sunzilog_maybe_update_regs(up, channel); |
| 791 | } |
| 792 | |
| 793 | static int sunzilog_startup(struct uart_port *port) |
| 794 | { |
| 795 | struct uart_sunzilog_port *up = UART_ZILOG(port); |
| 796 | unsigned long flags; |
| 797 | |
| 798 | if (ZS_IS_CONS(up)) |
| 799 | return 0; |
| 800 | |
| 801 | spin_lock_irqsave(&port->lock, flags); |
| 802 | __sunzilog_startup(up); |
| 803 | spin_unlock_irqrestore(&port->lock, flags); |
| 804 | return 0; |
| 805 | } |
| 806 | |
| 807 | /* |
| 808 | * The test for ZS_IS_CONS is explained by the following e-mail: |
| 809 | ***** |
| 810 | * From: Russell King <rmk@arm.linux.org.uk> |
| 811 | * Date: Sun, 8 Dec 2002 10:18:38 +0000 |
| 812 | * |
| 813 | * On Sun, Dec 08, 2002 at 02:43:36AM -0500, Pete Zaitcev wrote: |
| 814 | * > I boot my 2.5 boxes using "console=ttyS0,9600" argument, |
| 815 | * > and I noticed that something is not right with reference |
| 816 | * > counting in this case. It seems that when the console |
| 817 | * > is open by kernel initially, this is not accounted |
| 818 | * > as an open, and uart_startup is not called. |
| 819 | * |
| 820 | * That is correct. We are unable to call uart_startup when the serial |
| 821 | * console is initialised because it may need to allocate memory (as |
| 822 | * request_irq does) and the memory allocators may not have been |
| 823 | * initialised. |
| 824 | * |
| 825 | * 1. initialise the port into a state where it can send characters in the |
| 826 | * console write method. |
| 827 | * |
| 828 | * 2. don't do the actual hardware shutdown in your shutdown() method (but |
| 829 | * do the normal software shutdown - ie, free irqs etc) |
| 830 | ***** |
| 831 | */ |
| 832 | static void sunzilog_shutdown(struct uart_port *port) |
| 833 | { |
| 834 | struct uart_sunzilog_port *up = UART_ZILOG(port); |
| 835 | struct zilog_channel __iomem *channel; |
| 836 | unsigned long flags; |
| 837 | |
| 838 | if (ZS_IS_CONS(up)) |
| 839 | return; |
| 840 | |
| 841 | spin_lock_irqsave(&port->lock, flags); |
| 842 | |
| 843 | channel = ZILOG_CHANNEL_FROM_PORT(port); |
| 844 | |
| 845 | /* Disable receiver and transmitter. */ |
| 846 | up->curregs[R3] &= ~RxENAB; |
| 847 | up->curregs[R5] &= ~TxENAB; |
| 848 | |
| 849 | /* Disable all interrupts and BRK assertion. */ |
| 850 | up->curregs[R1] &= ~(EXT_INT_ENAB | TxINT_ENAB | RxINT_MASK); |
| 851 | up->curregs[R5] &= ~SND_BRK; |
| 852 | sunzilog_maybe_update_regs(up, channel); |
| 853 | |
| 854 | spin_unlock_irqrestore(&port->lock, flags); |
| 855 | } |
| 856 | |
| 857 | /* Shared by TTY driver and serial console setup. The port lock is held |
| 858 | * and local interrupts are disabled. |
| 859 | */ |
| 860 | static void |
| 861 | sunzilog_convert_to_zs(struct uart_sunzilog_port *up, unsigned int cflag, |
| 862 | unsigned int iflag, int brg) |
| 863 | { |
| 864 | |
| 865 | up->curregs[R10] = NRZ; |
| 866 | up->curregs[R11] = TCBR | RCBR; |
| 867 | |
| 868 | /* Program BAUD and clock source. */ |
| 869 | up->curregs[R4] &= ~XCLK_MASK; |
| 870 | up->curregs[R4] |= X16CLK; |
| 871 | up->curregs[R12] = brg & 0xff; |
| 872 | up->curregs[R13] = (brg >> 8) & 0xff; |
| 873 | up->curregs[R14] = BRSRC | BRENAB; |
| 874 | |
| 875 | /* Character size, stop bits, and parity. */ |
Mark Fortescue | 7cc5c85 | 2007-05-09 13:49:04 -0700 | [diff] [blame] | 876 | up->curregs[R3] &= ~RxN_MASK; |
| 877 | up->curregs[R5] &= ~TxN_MASK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 878 | switch (cflag & CSIZE) { |
| 879 | case CS5: |
Mark Fortescue | 7cc5c85 | 2007-05-09 13:49:04 -0700 | [diff] [blame] | 880 | up->curregs[R3] |= Rx5; |
| 881 | up->curregs[R5] |= Tx5; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 882 | up->parity_mask = 0x1f; |
| 883 | break; |
| 884 | case CS6: |
Mark Fortescue | 7cc5c85 | 2007-05-09 13:49:04 -0700 | [diff] [blame] | 885 | up->curregs[R3] |= Rx6; |
| 886 | up->curregs[R5] |= Tx6; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 887 | up->parity_mask = 0x3f; |
| 888 | break; |
| 889 | case CS7: |
Mark Fortescue | 7cc5c85 | 2007-05-09 13:49:04 -0700 | [diff] [blame] | 890 | up->curregs[R3] |= Rx7; |
| 891 | up->curregs[R5] |= Tx7; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 892 | up->parity_mask = 0x7f; |
| 893 | break; |
| 894 | case CS8: |
| 895 | default: |
Mark Fortescue | 7cc5c85 | 2007-05-09 13:49:04 -0700 | [diff] [blame] | 896 | up->curregs[R3] |= Rx8; |
| 897 | up->curregs[R5] |= Tx8; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 898 | up->parity_mask = 0xff; |
| 899 | break; |
| 900 | }; |
Mark Fortescue | 7cc5c85 | 2007-05-09 13:49:04 -0700 | [diff] [blame] | 901 | up->curregs[R4] &= ~0x0c; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 902 | if (cflag & CSTOPB) |
Mark Fortescue | 7cc5c85 | 2007-05-09 13:49:04 -0700 | [diff] [blame] | 903 | up->curregs[R4] |= SB2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 904 | else |
Mark Fortescue | 7cc5c85 | 2007-05-09 13:49:04 -0700 | [diff] [blame] | 905 | up->curregs[R4] |= SB1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 906 | if (cflag & PARENB) |
Mark Fortescue | 7cc5c85 | 2007-05-09 13:49:04 -0700 | [diff] [blame] | 907 | up->curregs[R4] |= PAR_ENAB; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 908 | else |
Mark Fortescue | 7cc5c85 | 2007-05-09 13:49:04 -0700 | [diff] [blame] | 909 | up->curregs[R4] &= ~PAR_ENAB; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 910 | if (!(cflag & PARODD)) |
Mark Fortescue | 7cc5c85 | 2007-05-09 13:49:04 -0700 | [diff] [blame] | 911 | up->curregs[R4] |= PAR_EVEN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 912 | else |
Mark Fortescue | 7cc5c85 | 2007-05-09 13:49:04 -0700 | [diff] [blame] | 913 | up->curregs[R4] &= ~PAR_EVEN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 914 | |
| 915 | up->port.read_status_mask = Rx_OVR; |
| 916 | if (iflag & INPCK) |
| 917 | up->port.read_status_mask |= CRC_ERR | PAR_ERR; |
| 918 | if (iflag & (BRKINT | PARMRK)) |
| 919 | up->port.read_status_mask |= BRK_ABRT; |
| 920 | |
| 921 | up->port.ignore_status_mask = 0; |
| 922 | if (iflag & IGNPAR) |
| 923 | up->port.ignore_status_mask |= CRC_ERR | PAR_ERR; |
| 924 | if (iflag & IGNBRK) { |
| 925 | up->port.ignore_status_mask |= BRK_ABRT; |
| 926 | if (iflag & IGNPAR) |
| 927 | up->port.ignore_status_mask |= Rx_OVR; |
| 928 | } |
| 929 | |
| 930 | if ((cflag & CREAD) == 0) |
| 931 | up->port.ignore_status_mask = 0xff; |
| 932 | } |
| 933 | |
| 934 | /* The port lock is not held. */ |
| 935 | static void |
Alan Cox | 606d099 | 2006-12-08 02:38:45 -0800 | [diff] [blame] | 936 | sunzilog_set_termios(struct uart_port *port, struct ktermios *termios, |
| 937 | struct ktermios *old) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 938 | { |
| 939 | struct uart_sunzilog_port *up = (struct uart_sunzilog_port *) port; |
| 940 | unsigned long flags; |
| 941 | int baud, brg; |
| 942 | |
| 943 | baud = uart_get_baud_rate(port, termios, old, 1200, 76800); |
| 944 | |
| 945 | spin_lock_irqsave(&up->port.lock, flags); |
| 946 | |
| 947 | brg = BPS_TO_BRG(baud, ZS_CLOCK / ZS_CLOCK_DIVISOR); |
| 948 | |
| 949 | sunzilog_convert_to_zs(up, termios->c_cflag, termios->c_iflag, brg); |
| 950 | |
| 951 | if (UART_ENABLE_MS(&up->port, termios->c_cflag)) |
| 952 | up->flags |= SUNZILOG_FLAG_MODEM_STATUS; |
| 953 | else |
| 954 | up->flags &= ~SUNZILOG_FLAG_MODEM_STATUS; |
| 955 | |
| 956 | up->cflag = termios->c_cflag; |
| 957 | |
| 958 | sunzilog_maybe_update_regs(up, ZILOG_CHANNEL_FROM_PORT(port)); |
| 959 | |
| 960 | uart_update_timeout(port, termios->c_cflag, baud); |
| 961 | |
| 962 | spin_unlock_irqrestore(&up->port.lock, flags); |
| 963 | } |
| 964 | |
| 965 | static const char *sunzilog_type(struct uart_port *port) |
| 966 | { |
Mark Fortescue | 7cc5c85 | 2007-05-09 13:49:04 -0700 | [diff] [blame] | 967 | struct uart_sunzilog_port *up = UART_ZILOG(port); |
| 968 | |
| 969 | return (up->flags & SUNZILOG_FLAG_ESCC) ? "zs (ESCC)" : "zs"; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 970 | } |
| 971 | |
| 972 | /* We do not request/release mappings of the registers here, this |
| 973 | * happens at early serial probe time. |
| 974 | */ |
| 975 | static void sunzilog_release_port(struct uart_port *port) |
| 976 | { |
| 977 | } |
| 978 | |
| 979 | static int sunzilog_request_port(struct uart_port *port) |
| 980 | { |
| 981 | return 0; |
| 982 | } |
| 983 | |
| 984 | /* These do not need to do anything interesting either. */ |
| 985 | static void sunzilog_config_port(struct uart_port *port, int flags) |
| 986 | { |
| 987 | } |
| 988 | |
| 989 | /* We do not support letting the user mess with the divisor, IRQ, etc. */ |
| 990 | static int sunzilog_verify_port(struct uart_port *port, struct serial_struct *ser) |
| 991 | { |
| 992 | return -EINVAL; |
| 993 | } |
| 994 | |
Jason Wessel | 6d45a1a | 2010-05-20 21:04:23 -0500 | [diff] [blame] | 995 | #ifdef CONFIG_CONSOLE_POLL |
| 996 | static int sunzilog_get_poll_char(struct uart_port *port) |
| 997 | { |
| 998 | unsigned char ch, r1; |
| 999 | struct uart_sunzilog_port *up = (struct uart_sunzilog_port *) port; |
| 1000 | struct zilog_channel __iomem *channel |
| 1001 | = ZILOG_CHANNEL_FROM_PORT(&up->port); |
| 1002 | |
| 1003 | |
| 1004 | r1 = read_zsreg(channel, R1); |
| 1005 | if (r1 & (PAR_ERR | Rx_OVR | CRC_ERR)) { |
| 1006 | writeb(ERR_RES, &channel->control); |
| 1007 | ZSDELAY(); |
| 1008 | ZS_WSYNC(channel); |
| 1009 | } |
| 1010 | |
| 1011 | ch = readb(&channel->control); |
| 1012 | ZSDELAY(); |
| 1013 | |
| 1014 | /* This funny hack depends upon BRK_ABRT not interfering |
| 1015 | * with the other bits we care about in R1. |
| 1016 | */ |
| 1017 | if (ch & BRK_ABRT) |
| 1018 | r1 |= BRK_ABRT; |
| 1019 | |
| 1020 | if (!(ch & Rx_CH_AV)) |
| 1021 | return NO_POLL_CHAR; |
| 1022 | |
| 1023 | ch = readb(&channel->data); |
| 1024 | ZSDELAY(); |
| 1025 | |
| 1026 | ch &= up->parity_mask; |
| 1027 | return ch; |
| 1028 | } |
| 1029 | |
| 1030 | static void sunzilog_put_poll_char(struct uart_port *port, |
| 1031 | unsigned char ch) |
| 1032 | { |
| 1033 | struct uart_sunzilog_port *up = (struct uart_sunzilog_port *)port; |
| 1034 | |
| 1035 | sunzilog_putchar(&up->port, ch); |
| 1036 | } |
| 1037 | #endif /* CONFIG_CONSOLE_POLL */ |
| 1038 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1039 | static struct uart_ops sunzilog_pops = { |
| 1040 | .tx_empty = sunzilog_tx_empty, |
| 1041 | .set_mctrl = sunzilog_set_mctrl, |
| 1042 | .get_mctrl = sunzilog_get_mctrl, |
| 1043 | .stop_tx = sunzilog_stop_tx, |
| 1044 | .start_tx = sunzilog_start_tx, |
| 1045 | .stop_rx = sunzilog_stop_rx, |
| 1046 | .enable_ms = sunzilog_enable_ms, |
| 1047 | .break_ctl = sunzilog_break_ctl, |
| 1048 | .startup = sunzilog_startup, |
| 1049 | .shutdown = sunzilog_shutdown, |
| 1050 | .set_termios = sunzilog_set_termios, |
| 1051 | .type = sunzilog_type, |
| 1052 | .release_port = sunzilog_release_port, |
| 1053 | .request_port = sunzilog_request_port, |
| 1054 | .config_port = sunzilog_config_port, |
| 1055 | .verify_port = sunzilog_verify_port, |
Jason Wessel | 6d45a1a | 2010-05-20 21:04:23 -0500 | [diff] [blame] | 1056 | #ifdef CONFIG_CONSOLE_POLL |
| 1057 | .poll_get_char = sunzilog_get_poll_char, |
| 1058 | .poll_put_char = sunzilog_put_poll_char, |
| 1059 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1060 | }; |
| 1061 | |
Robert Reif | 227739b | 2008-04-24 03:37:51 -0700 | [diff] [blame] | 1062 | static int uart_chip_count; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1063 | static struct uart_sunzilog_port *sunzilog_port_table; |
| 1064 | static struct zilog_layout __iomem **sunzilog_chip_regs; |
| 1065 | |
| 1066 | static struct uart_sunzilog_port *sunzilog_irq_chain; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1067 | |
| 1068 | static struct uart_driver sunzilog_reg = { |
| 1069 | .owner = THIS_MODULE, |
David S. Miller | 32039f4 | 2008-05-01 01:14:27 -0700 | [diff] [blame] | 1070 | .driver_name = "sunzilog", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1071 | .dev_name = "ttyS", |
| 1072 | .major = TTY_MAJOR, |
| 1073 | }; |
| 1074 | |
Martin Habets | 58d784a | 2007-12-11 03:37:04 -0800 | [diff] [blame] | 1075 | static int __init sunzilog_alloc_tables(int num_sunzilog) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1076 | { |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1077 | struct uart_sunzilog_port *up; |
| 1078 | unsigned long size; |
Martin Habets | 58d784a | 2007-12-11 03:37:04 -0800 | [diff] [blame] | 1079 | int num_channels = num_sunzilog * 2; |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1080 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1081 | |
Martin Habets | 58d784a | 2007-12-11 03:37:04 -0800 | [diff] [blame] | 1082 | size = num_channels * sizeof(struct uart_sunzilog_port); |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1083 | sunzilog_port_table = kzalloc(size, GFP_KERNEL); |
| 1084 | if (!sunzilog_port_table) |
| 1085 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1086 | |
Martin Habets | 58d784a | 2007-12-11 03:37:04 -0800 | [diff] [blame] | 1087 | for (i = 0; i < num_channels; i++) { |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1088 | up = &sunzilog_port_table[i]; |
| 1089 | |
| 1090 | spin_lock_init(&up->port.lock); |
| 1091 | |
| 1092 | if (i == 0) |
| 1093 | sunzilog_irq_chain = up; |
| 1094 | |
Martin Habets | 58d784a | 2007-12-11 03:37:04 -0800 | [diff] [blame] | 1095 | if (i < num_channels - 1) |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1096 | up->next = up + 1; |
| 1097 | else |
| 1098 | up->next = NULL; |
| 1099 | } |
| 1100 | |
Martin Habets | 58d784a | 2007-12-11 03:37:04 -0800 | [diff] [blame] | 1101 | size = num_sunzilog * sizeof(struct zilog_layout __iomem *); |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1102 | sunzilog_chip_regs = kzalloc(size, GFP_KERNEL); |
| 1103 | if (!sunzilog_chip_regs) { |
| 1104 | kfree(sunzilog_port_table); |
| 1105 | sunzilog_irq_chain = NULL; |
| 1106 | return -ENOMEM; |
| 1107 | } |
| 1108 | |
| 1109 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1110 | } |
| 1111 | |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1112 | static void sunzilog_free_tables(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1113 | { |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1114 | kfree(sunzilog_port_table); |
| 1115 | sunzilog_irq_chain = NULL; |
| 1116 | kfree(sunzilog_chip_regs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1117 | } |
| 1118 | |
| 1119 | #define ZS_PUT_CHAR_MAX_DELAY 2000 /* 10 ms */ |
| 1120 | |
Russell King | d358788 | 2006-03-20 20:00:09 +0000 | [diff] [blame] | 1121 | static void sunzilog_putchar(struct uart_port *port, int ch) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1122 | { |
Al Viro | 4834327 | 2006-10-10 22:44:47 +0100 | [diff] [blame] | 1123 | struct zilog_channel __iomem *channel = ZILOG_CHANNEL_FROM_PORT(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1124 | int loops = ZS_PUT_CHAR_MAX_DELAY; |
| 1125 | |
| 1126 | /* This is a timed polling loop so do not switch the explicit |
| 1127 | * udelay with ZSDELAY as that is a NOP on some platforms. -DaveM |
| 1128 | */ |
| 1129 | do { |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1130 | unsigned char val = readb(&channel->control); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1131 | if (val & Tx_BUF_EMP) { |
| 1132 | ZSDELAY(); |
| 1133 | break; |
| 1134 | } |
| 1135 | udelay(5); |
| 1136 | } while (--loops); |
| 1137 | |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1138 | writeb(ch, &channel->data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1139 | ZSDELAY(); |
| 1140 | ZS_WSYNC(channel); |
| 1141 | } |
| 1142 | |
| 1143 | #ifdef CONFIG_SERIO |
| 1144 | |
| 1145 | static DEFINE_SPINLOCK(sunzilog_serio_lock); |
| 1146 | |
| 1147 | static int sunzilog_serio_write(struct serio *serio, unsigned char ch) |
| 1148 | { |
| 1149 | struct uart_sunzilog_port *up = serio->port_data; |
| 1150 | unsigned long flags; |
| 1151 | |
| 1152 | spin_lock_irqsave(&sunzilog_serio_lock, flags); |
| 1153 | |
Russell King | d358788 | 2006-03-20 20:00:09 +0000 | [diff] [blame] | 1154 | sunzilog_putchar(&up->port, ch); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1155 | |
| 1156 | spin_unlock_irqrestore(&sunzilog_serio_lock, flags); |
| 1157 | |
| 1158 | return 0; |
| 1159 | } |
| 1160 | |
| 1161 | static int sunzilog_serio_open(struct serio *serio) |
| 1162 | { |
| 1163 | struct uart_sunzilog_port *up = serio->port_data; |
| 1164 | unsigned long flags; |
| 1165 | int ret; |
| 1166 | |
| 1167 | spin_lock_irqsave(&sunzilog_serio_lock, flags); |
| 1168 | if (!up->serio_open) { |
| 1169 | up->serio_open = 1; |
| 1170 | ret = 0; |
| 1171 | } else |
| 1172 | ret = -EBUSY; |
| 1173 | spin_unlock_irqrestore(&sunzilog_serio_lock, flags); |
| 1174 | |
| 1175 | return ret; |
| 1176 | } |
| 1177 | |
| 1178 | static void sunzilog_serio_close(struct serio *serio) |
| 1179 | { |
| 1180 | struct uart_sunzilog_port *up = serio->port_data; |
| 1181 | unsigned long flags; |
| 1182 | |
| 1183 | spin_lock_irqsave(&sunzilog_serio_lock, flags); |
| 1184 | up->serio_open = 0; |
| 1185 | spin_unlock_irqrestore(&sunzilog_serio_lock, flags); |
| 1186 | } |
| 1187 | |
| 1188 | #endif /* CONFIG_SERIO */ |
| 1189 | |
| 1190 | #ifdef CONFIG_SERIAL_SUNZILOG_CONSOLE |
| 1191 | static void |
| 1192 | sunzilog_console_write(struct console *con, const char *s, unsigned int count) |
| 1193 | { |
| 1194 | struct uart_sunzilog_port *up = &sunzilog_port_table[con->index]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1195 | unsigned long flags; |
David S. Miller | f3c681c | 2007-07-15 23:53:32 -0700 | [diff] [blame] | 1196 | int locked = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1197 | |
David S. Miller | f3c681c | 2007-07-15 23:53:32 -0700 | [diff] [blame] | 1198 | local_irq_save(flags); |
| 1199 | if (up->port.sysrq) { |
| 1200 | locked = 0; |
| 1201 | } else if (oops_in_progress) { |
| 1202 | locked = spin_trylock(&up->port.lock); |
| 1203 | } else |
| 1204 | spin_lock(&up->port.lock); |
| 1205 | |
Russell King | d358788 | 2006-03-20 20:00:09 +0000 | [diff] [blame] | 1206 | uart_console_write(&up->port, s, count, sunzilog_putchar); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1207 | udelay(2); |
David S. Miller | f3c681c | 2007-07-15 23:53:32 -0700 | [diff] [blame] | 1208 | |
| 1209 | if (locked) |
| 1210 | spin_unlock(&up->port.lock); |
| 1211 | local_irq_restore(flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1212 | } |
| 1213 | |
| 1214 | static int __init sunzilog_console_setup(struct console *con, char *options) |
| 1215 | { |
| 1216 | struct uart_sunzilog_port *up = &sunzilog_port_table[con->index]; |
| 1217 | unsigned long flags; |
| 1218 | int baud, brg; |
| 1219 | |
David S. Miller | b8b99e8 | 2006-08-23 15:53:39 -0700 | [diff] [blame] | 1220 | if (up->port.type != PORT_SUNZILOG) |
| 1221 | return -1; |
| 1222 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1223 | printk(KERN_INFO "Console: ttyS%d (SunZilog zs%d)\n", |
| 1224 | (sunzilog_reg.minor - 64) + con->index, con->index); |
| 1225 | |
| 1226 | /* Get firmware console settings. */ |
Grant Likely | 2dc1158 | 2010-08-06 09:25:50 -0600 | [diff] [blame] | 1227 | sunserial_console_termios(con, up->port.dev->of_node); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1228 | |
| 1229 | /* Firmware console speed is limited to 150-->38400 baud so |
| 1230 | * this hackish cflag thing is OK. |
| 1231 | */ |
| 1232 | switch (con->cflag & CBAUD) { |
| 1233 | case B150: baud = 150; break; |
| 1234 | case B300: baud = 300; break; |
| 1235 | case B600: baud = 600; break; |
| 1236 | case B1200: baud = 1200; break; |
| 1237 | case B2400: baud = 2400; break; |
| 1238 | case B4800: baud = 4800; break; |
| 1239 | default: case B9600: baud = 9600; break; |
| 1240 | case B19200: baud = 19200; break; |
| 1241 | case B38400: baud = 38400; break; |
| 1242 | }; |
| 1243 | |
| 1244 | brg = BPS_TO_BRG(baud, ZS_CLOCK / ZS_CLOCK_DIVISOR); |
| 1245 | |
| 1246 | spin_lock_irqsave(&up->port.lock, flags); |
| 1247 | |
Mark Fortescue | 7cc5c85 | 2007-05-09 13:49:04 -0700 | [diff] [blame] | 1248 | up->curregs[R15] |= BRKIE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1249 | sunzilog_convert_to_zs(up, con->cflag, 0, brg); |
| 1250 | |
| 1251 | sunzilog_set_mctrl(&up->port, TIOCM_DTR | TIOCM_RTS); |
| 1252 | __sunzilog_startup(up); |
| 1253 | |
| 1254 | spin_unlock_irqrestore(&up->port.lock, flags); |
| 1255 | |
| 1256 | return 0; |
| 1257 | } |
| 1258 | |
Martin Habets | eba8cef | 2006-10-10 14:44:01 -0700 | [diff] [blame] | 1259 | static struct console sunzilog_console_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1260 | .name = "ttyS", |
| 1261 | .write = sunzilog_console_write, |
| 1262 | .device = uart_console_device, |
| 1263 | .setup = sunzilog_console_setup, |
| 1264 | .flags = CON_PRINTBUFFER, |
| 1265 | .index = -1, |
| 1266 | .data = &sunzilog_reg, |
| 1267 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1268 | |
David S. Miller | 1ddb7c9 | 2006-02-13 20:09:10 -0800 | [diff] [blame] | 1269 | static inline struct console *SUNZILOG_CONSOLE(void) |
| 1270 | { |
Martin Habets | eba8cef | 2006-10-10 14:44:01 -0700 | [diff] [blame] | 1271 | return &sunzilog_console_ops; |
David S. Miller | 1ddb7c9 | 2006-02-13 20:09:10 -0800 | [diff] [blame] | 1272 | } |
| 1273 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1274 | #else |
David S. Miller | 1ddb7c9 | 2006-02-13 20:09:10 -0800 | [diff] [blame] | 1275 | #define SUNZILOG_CONSOLE() (NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1276 | #endif |
| 1277 | |
Bill Pemberton | 9671f09 | 2012-11-19 13:21:50 -0500 | [diff] [blame] | 1278 | static void sunzilog_init_kbdms(struct uart_sunzilog_port *up) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1279 | { |
| 1280 | int baud, brg; |
| 1281 | |
David S. Miller | 8a84eb1 | 2006-07-19 22:55:08 -0700 | [diff] [blame] | 1282 | if (up->flags & SUNZILOG_FLAG_CONS_KEYB) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1283 | up->cflag = B1200 | CS8 | CLOCAL | CREAD; |
| 1284 | baud = 1200; |
| 1285 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1286 | up->cflag = B4800 | CS8 | CLOCAL | CREAD; |
| 1287 | baud = 4800; |
| 1288 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1289 | |
Mark Fortescue | 7cc5c85 | 2007-05-09 13:49:04 -0700 | [diff] [blame] | 1290 | up->curregs[R15] |= BRKIE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1291 | brg = BPS_TO_BRG(baud, ZS_CLOCK / ZS_CLOCK_DIVISOR); |
| 1292 | sunzilog_convert_to_zs(up, up->cflag, 0, brg); |
| 1293 | sunzilog_set_mctrl(&up->port, TIOCM_DTR | TIOCM_RTS); |
| 1294 | __sunzilog_startup(up); |
| 1295 | } |
| 1296 | |
| 1297 | #ifdef CONFIG_SERIO |
Bill Pemberton | 9671f09 | 2012-11-19 13:21:50 -0500 | [diff] [blame] | 1298 | static void sunzilog_register_serio(struct uart_sunzilog_port *up) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1299 | { |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1300 | struct serio *serio = &up->serio; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1301 | |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1302 | serio->port_data = up; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1303 | |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1304 | serio->id.type = SERIO_RS232; |
David S. Miller | 8a84eb1 | 2006-07-19 22:55:08 -0700 | [diff] [blame] | 1305 | if (up->flags & SUNZILOG_FLAG_CONS_KEYB) { |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1306 | serio->id.proto = SERIO_SUNKBD; |
| 1307 | strlcpy(serio->name, "zskbd", sizeof(serio->name)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1308 | } else { |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1309 | serio->id.proto = SERIO_SUN; |
| 1310 | serio->id.extra = 1; |
| 1311 | strlcpy(serio->name, "zsms", sizeof(serio->name)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1312 | } |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1313 | strlcpy(serio->phys, |
David S. Miller | 8a84eb1 | 2006-07-19 22:55:08 -0700 | [diff] [blame] | 1314 | ((up->flags & SUNZILOG_FLAG_CONS_KEYB) ? |
| 1315 | "zs/serio0" : "zs/serio1"), |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1316 | sizeof(serio->phys)); |
| 1317 | |
| 1318 | serio->write = sunzilog_serio_write; |
| 1319 | serio->open = sunzilog_serio_open; |
| 1320 | serio->close = sunzilog_serio_close; |
| 1321 | serio->dev.parent = up->port.dev; |
| 1322 | |
| 1323 | serio_register_port(serio); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1324 | } |
| 1325 | #endif |
| 1326 | |
Bill Pemberton | 9671f09 | 2012-11-19 13:21:50 -0500 | [diff] [blame] | 1327 | static void sunzilog_init_hw(struct uart_sunzilog_port *up) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1328 | { |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1329 | struct zilog_channel __iomem *channel; |
| 1330 | unsigned long flags; |
| 1331 | int baud, brg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1332 | |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1333 | channel = ZILOG_CHANNEL_FROM_PORT(&up->port); |
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 | spin_lock_irqsave(&up->port.lock, flags); |
| 1336 | if (ZS_IS_CHANNEL_A(up)) { |
| 1337 | write_zsreg(channel, R9, FHWRES); |
| 1338 | ZSDELAY_LONG(); |
| 1339 | (void) read_zsreg(channel, R0); |
| 1340 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1341 | |
David S. Miller | 8a84eb1 | 2006-07-19 22:55:08 -0700 | [diff] [blame] | 1342 | if (up->flags & (SUNZILOG_FLAG_CONS_KEYB | |
| 1343 | SUNZILOG_FLAG_CONS_MOUSE)) { |
Mark Fortescue | 7cc5c85 | 2007-05-09 13:49:04 -0700 | [diff] [blame] | 1344 | up->curregs[R1] = EXT_INT_ENAB | INT_ALL_Rx | TxINT_ENAB; |
| 1345 | up->curregs[R4] = PAR_EVEN | X16CLK | SB1; |
| 1346 | up->curregs[R3] = RxENAB | Rx8; |
| 1347 | up->curregs[R5] = TxENAB | Tx8; |
| 1348 | up->curregs[R6] = 0x00; /* SDLC Address */ |
| 1349 | up->curregs[R7] = 0x7E; /* SDLC Flag */ |
| 1350 | up->curregs[R9] = NV; |
| 1351 | up->curregs[R7p] = 0x00; |
Robert Reif | 3ade116 | 2008-04-26 23:10:19 -0700 | [diff] [blame] | 1352 | sunzilog_init_kbdms(up); |
Mark Fortescue | 7cc5c85 | 2007-05-09 13:49:04 -0700 | [diff] [blame] | 1353 | /* Only enable interrupts if an ISR handler available */ |
| 1354 | if (up->flags & SUNZILOG_FLAG_ISR_HANDLER) |
| 1355 | up->curregs[R9] |= MIE; |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1356 | write_zsreg(channel, R9, up->curregs[R9]); |
| 1357 | } else { |
| 1358 | /* Normal serial TTY. */ |
| 1359 | up->parity_mask = 0xff; |
| 1360 | up->curregs[R1] = EXT_INT_ENAB | INT_ALL_Rx | TxINT_ENAB; |
| 1361 | up->curregs[R4] = PAR_EVEN | X16CLK | SB1; |
| 1362 | up->curregs[R3] = RxENAB | Rx8; |
| 1363 | up->curregs[R5] = TxENAB | Tx8; |
Mark Fortescue | 7cc5c85 | 2007-05-09 13:49:04 -0700 | [diff] [blame] | 1364 | up->curregs[R6] = 0x00; /* SDLC Address */ |
| 1365 | up->curregs[R7] = 0x7E; /* SDLC Flag */ |
| 1366 | up->curregs[R9] = NV; |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1367 | up->curregs[R10] = NRZ; |
| 1368 | up->curregs[R11] = TCBR | RCBR; |
| 1369 | baud = 9600; |
| 1370 | brg = BPS_TO_BRG(baud, ZS_CLOCK / ZS_CLOCK_DIVISOR); |
| 1371 | up->curregs[R12] = (brg & 0xff); |
| 1372 | up->curregs[R13] = (brg >> 8) & 0xff; |
| 1373 | up->curregs[R14] = BRSRC | BRENAB; |
Mark Fortescue | 7cc5c85 | 2007-05-09 13:49:04 -0700 | [diff] [blame] | 1374 | up->curregs[R15] = FIFOEN; /* Use FIFO if on ESCC */ |
| 1375 | up->curregs[R7p] = TxFIFO_LVL | RxFIFO_LVL; |
| 1376 | if (__load_zsregs(channel, up->curregs)) { |
| 1377 | up->flags |= SUNZILOG_FLAG_ESCC; |
| 1378 | } |
| 1379 | /* Only enable interrupts if an ISR handler available */ |
| 1380 | if (up->flags & SUNZILOG_FLAG_ISR_HANDLER) |
| 1381 | up->curregs[R9] |= MIE; |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1382 | write_zsreg(channel, R9, up->curregs[R9]); |
| 1383 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1384 | |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1385 | spin_unlock_irqrestore(&up->port.lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1386 | |
| 1387 | #ifdef CONFIG_SERIO |
David S. Miller | 8a84eb1 | 2006-07-19 22:55:08 -0700 | [diff] [blame] | 1388 | if (up->flags & (SUNZILOG_FLAG_CONS_KEYB | |
| 1389 | SUNZILOG_FLAG_CONS_MOUSE)) |
| 1390 | sunzilog_register_serio(up); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1391 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1392 | } |
| 1393 | |
Alan Cox | d4e33fa | 2012-01-26 17:44:09 +0000 | [diff] [blame] | 1394 | static int zilog_irq; |
David S. Miller | 4fa97dc | 2006-06-29 15:13:40 -0700 | [diff] [blame] | 1395 | |
Bill Pemberton | 9671f09 | 2012-11-19 13:21:50 -0500 | [diff] [blame] | 1396 | static int zs_probe(struct platform_device *op) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1397 | { |
Robert Reif | 227739b | 2008-04-24 03:37:51 -0700 | [diff] [blame] | 1398 | static int kbm_inst, uart_inst; |
| 1399 | int inst; |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1400 | struct uart_sunzilog_port *up; |
| 1401 | struct zilog_layout __iomem *rp; |
Robert Reif | 227739b | 2008-04-24 03:37:51 -0700 | [diff] [blame] | 1402 | int keyboard_mouse = 0; |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1403 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1404 | |
Grant Likely | 61c7a08 | 2010-04-13 16:12:29 -0700 | [diff] [blame] | 1405 | if (of_find_property(op->dev.of_node, "keyboard", NULL)) |
David S. Miller | 8a84eb1 | 2006-07-19 22:55:08 -0700 | [diff] [blame] | 1406 | keyboard_mouse = 1; |
| 1407 | |
Robert Reif | 227739b | 2008-04-24 03:37:51 -0700 | [diff] [blame] | 1408 | /* uarts must come before keyboards/mice */ |
| 1409 | if (keyboard_mouse) |
| 1410 | inst = uart_chip_count + kbm_inst; |
| 1411 | else |
| 1412 | inst = uart_inst; |
| 1413 | |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1414 | sunzilog_chip_regs[inst] = of_ioremap(&op->resource[0], 0, |
| 1415 | sizeof(struct zilog_layout), |
| 1416 | "zs"); |
| 1417 | if (!sunzilog_chip_regs[inst]) |
| 1418 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1419 | |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1420 | rp = sunzilog_chip_regs[inst]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1421 | |
Alan Cox | d4e33fa | 2012-01-26 17:44:09 +0000 | [diff] [blame] | 1422 | if (!zilog_irq) |
Grant Likely | 1636f8a | 2010-06-18 11:09:58 -0600 | [diff] [blame] | 1423 | zilog_irq = op->archdata.irqs[0]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1424 | |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1425 | up = &sunzilog_port_table[inst * 2]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1426 | |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1427 | /* Channel A */ |
| 1428 | up[0].port.mapbase = op->resource[0].start + 0x00; |
| 1429 | up[0].port.membase = (void __iomem *) &rp->channelA; |
| 1430 | up[0].port.iotype = UPIO_MEM; |
Grant Likely | 1636f8a | 2010-06-18 11:09:58 -0600 | [diff] [blame] | 1431 | up[0].port.irq = op->archdata.irqs[0]; |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1432 | up[0].port.uartclk = ZS_CLOCK; |
| 1433 | up[0].port.fifosize = 1; |
| 1434 | up[0].port.ops = &sunzilog_pops; |
| 1435 | up[0].port.type = PORT_SUNZILOG; |
| 1436 | up[0].port.flags = 0; |
| 1437 | up[0].port.line = (inst * 2) + 0; |
| 1438 | up[0].port.dev = &op->dev; |
| 1439 | up[0].flags |= SUNZILOG_FLAG_IS_CHANNEL_A; |
David S. Miller | 8a84eb1 | 2006-07-19 22:55:08 -0700 | [diff] [blame] | 1440 | if (keyboard_mouse) |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1441 | up[0].flags |= SUNZILOG_FLAG_CONS_KEYB; |
| 1442 | sunzilog_init_hw(&up[0]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1443 | |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1444 | /* Channel B */ |
| 1445 | up[1].port.mapbase = op->resource[0].start + 0x04; |
| 1446 | up[1].port.membase = (void __iomem *) &rp->channelB; |
| 1447 | up[1].port.iotype = UPIO_MEM; |
Grant Likely | 1636f8a | 2010-06-18 11:09:58 -0600 | [diff] [blame] | 1448 | up[1].port.irq = op->archdata.irqs[0]; |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1449 | up[1].port.uartclk = ZS_CLOCK; |
| 1450 | up[1].port.fifosize = 1; |
| 1451 | up[1].port.ops = &sunzilog_pops; |
| 1452 | up[1].port.type = PORT_SUNZILOG; |
| 1453 | up[1].port.flags = 0; |
| 1454 | up[1].port.line = (inst * 2) + 1; |
| 1455 | up[1].port.dev = &op->dev; |
| 1456 | up[1].flags |= 0; |
David S. Miller | 8a84eb1 | 2006-07-19 22:55:08 -0700 | [diff] [blame] | 1457 | if (keyboard_mouse) |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1458 | up[1].flags |= SUNZILOG_FLAG_CONS_MOUSE; |
| 1459 | sunzilog_init_hw(&up[1]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1460 | |
David S. Miller | 8a84eb1 | 2006-07-19 22:55:08 -0700 | [diff] [blame] | 1461 | if (!keyboard_mouse) { |
Grant Likely | 61c7a08 | 2010-04-13 16:12:29 -0700 | [diff] [blame] | 1462 | if (sunserial_console_match(SUNZILOG_CONSOLE(), op->dev.of_node, |
David S. Miller | 4e3533d | 2009-11-24 14:03:34 -0800 | [diff] [blame] | 1463 | &sunzilog_reg, up[0].port.line, |
| 1464 | false)) |
David S. Miller | c73fcc8 | 2007-07-20 16:59:26 -0700 | [diff] [blame] | 1465 | up->flags |= SUNZILOG_FLAG_IS_CONS; |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1466 | err = uart_add_one_port(&sunzilog_reg, &up[0].port); |
| 1467 | if (err) { |
David S. Miller | e3a411a3 | 2006-12-28 21:01:32 -0800 | [diff] [blame] | 1468 | of_iounmap(&op->resource[0], |
| 1469 | rp, sizeof(struct zilog_layout)); |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1470 | return err; |
| 1471 | } |
Grant Likely | 61c7a08 | 2010-04-13 16:12:29 -0700 | [diff] [blame] | 1472 | if (sunserial_console_match(SUNZILOG_CONSOLE(), op->dev.of_node, |
David S. Miller | 4e3533d | 2009-11-24 14:03:34 -0800 | [diff] [blame] | 1473 | &sunzilog_reg, up[1].port.line, |
| 1474 | false)) |
David S. Miller | c73fcc8 | 2007-07-20 16:59:26 -0700 | [diff] [blame] | 1475 | up->flags |= SUNZILOG_FLAG_IS_CONS; |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1476 | err = uart_add_one_port(&sunzilog_reg, &up[1].port); |
| 1477 | if (err) { |
| 1478 | uart_remove_one_port(&sunzilog_reg, &up[0].port); |
David S. Miller | e3a411a3 | 2006-12-28 21:01:32 -0800 | [diff] [blame] | 1479 | of_iounmap(&op->resource[0], |
| 1480 | rp, sizeof(struct zilog_layout)); |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1481 | return err; |
| 1482 | } |
Robert Reif | 227739b | 2008-04-24 03:37:51 -0700 | [diff] [blame] | 1483 | uart_inst++; |
David S. Miller | 8a84eb1 | 2006-07-19 22:55:08 -0700 | [diff] [blame] | 1484 | } else { |
David S. Miller | 4f1296a | 2007-08-25 15:17:31 -0700 | [diff] [blame] | 1485 | printk(KERN_INFO "%s: Keyboard at MMIO 0x%llx (irq = %d) " |
Mark Fortescue | 7cc5c85 | 2007-05-09 13:49:04 -0700 | [diff] [blame] | 1486 | "is a %s\n", |
Kay Sievers | 65a212d | 2009-03-24 16:38:21 -0700 | [diff] [blame] | 1487 | dev_name(&op->dev), |
David S. Miller | 4f1296a | 2007-08-25 15:17:31 -0700 | [diff] [blame] | 1488 | (unsigned long long) up[0].port.mapbase, |
Grant Likely | 1636f8a | 2010-06-18 11:09:58 -0600 | [diff] [blame] | 1489 | op->archdata.irqs[0], sunzilog_type(&up[0].port)); |
David S. Miller | 4f1296a | 2007-08-25 15:17:31 -0700 | [diff] [blame] | 1490 | printk(KERN_INFO "%s: Mouse at MMIO 0x%llx (irq = %d) " |
Mark Fortescue | 7cc5c85 | 2007-05-09 13:49:04 -0700 | [diff] [blame] | 1491 | "is a %s\n", |
Kay Sievers | 65a212d | 2009-03-24 16:38:21 -0700 | [diff] [blame] | 1492 | dev_name(&op->dev), |
David S. Miller | 4f1296a | 2007-08-25 15:17:31 -0700 | [diff] [blame] | 1493 | (unsigned long long) up[1].port.mapbase, |
Grant Likely | 1636f8a | 2010-06-18 11:09:58 -0600 | [diff] [blame] | 1494 | op->archdata.irqs[0], sunzilog_type(&up[1].port)); |
Robert Reif | 227739b | 2008-04-24 03:37:51 -0700 | [diff] [blame] | 1495 | kbm_inst++; |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1496 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1497 | |
Jingoo Han | 696faed | 2013-05-23 19:39:36 +0900 | [diff] [blame] | 1498 | platform_set_drvdata(op, &up[0]); |
David S. Miller | 4fa97dc | 2006-06-29 15:13:40 -0700 | [diff] [blame] | 1499 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1500 | return 0; |
| 1501 | } |
| 1502 | |
Bill Pemberton | ae8d8a1 | 2012-11-19 13:26:18 -0500 | [diff] [blame] | 1503 | static void zs_remove_one(struct uart_sunzilog_port *up) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1504 | { |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1505 | if (ZS_IS_KEYB(up) || ZS_IS_MOUSE(up)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1506 | #ifdef CONFIG_SERIO |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1507 | serio_unregister_port(&up->serio); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1508 | #endif |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1509 | } else |
| 1510 | uart_remove_one_port(&sunzilog_reg, &up->port); |
David S. Miller | 4fa97dc | 2006-06-29 15:13:40 -0700 | [diff] [blame] | 1511 | } |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1512 | |
Bill Pemberton | ae8d8a1 | 2012-11-19 13:26:18 -0500 | [diff] [blame] | 1513 | static int zs_remove(struct platform_device *op) |
David S. Miller | 4fa97dc | 2006-06-29 15:13:40 -0700 | [diff] [blame] | 1514 | { |
Jingoo Han | 696faed | 2013-05-23 19:39:36 +0900 | [diff] [blame] | 1515 | struct uart_sunzilog_port *up = platform_get_drvdata(op); |
David S. Miller | 4fa97dc | 2006-06-29 15:13:40 -0700 | [diff] [blame] | 1516 | struct zilog_layout __iomem *regs; |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1517 | |
David S. Miller | 4fa97dc | 2006-06-29 15:13:40 -0700 | [diff] [blame] | 1518 | zs_remove_one(&up[0]); |
| 1519 | zs_remove_one(&up[1]); |
| 1520 | |
| 1521 | regs = sunzilog_chip_regs[up[0].port.line / 2]; |
David S. Miller | e3a411a3 | 2006-12-28 21:01:32 -0800 | [diff] [blame] | 1522 | of_iounmap(&op->resource[0], regs, sizeof(struct zilog_layout)); |
David S. Miller | 4fa97dc | 2006-06-29 15:13:40 -0700 | [diff] [blame] | 1523 | |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1524 | return 0; |
| 1525 | } |
| 1526 | |
David S. Miller | fd09831 | 2008-08-31 01:23:17 -0700 | [diff] [blame] | 1527 | static const struct of_device_id zs_match[] = { |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1528 | { |
| 1529 | .name = "zs", |
| 1530 | }, |
| 1531 | {}, |
| 1532 | }; |
| 1533 | MODULE_DEVICE_TABLE(of, zs_match); |
| 1534 | |
Grant Likely | 793218d | 2011-02-22 21:10:26 -0700 | [diff] [blame] | 1535 | static struct platform_driver zs_driver = { |
Grant Likely | 4018294 | 2010-04-13 16:13:02 -0700 | [diff] [blame] | 1536 | .driver = { |
| 1537 | .name = "zs", |
| 1538 | .owner = THIS_MODULE, |
| 1539 | .of_match_table = zs_match, |
| 1540 | }, |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1541 | .probe = zs_probe, |
Bill Pemberton | 2d47b71 | 2012-11-19 13:21:34 -0500 | [diff] [blame] | 1542 | .remove = zs_remove, |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1543 | }; |
| 1544 | |
| 1545 | static int __init sunzilog_init(void) |
| 1546 | { |
| 1547 | struct device_node *dp; |
Robert Reif | 227739b | 2008-04-24 03:37:51 -0700 | [diff] [blame] | 1548 | int err; |
| 1549 | int num_keybms = 0; |
Martin Habets | 58d784a | 2007-12-11 03:37:04 -0800 | [diff] [blame] | 1550 | int num_sunzilog = 0; |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1551 | |
David S. Miller | 8a84eb1 | 2006-07-19 22:55:08 -0700 | [diff] [blame] | 1552 | for_each_node_by_name(dp, "zs") { |
Martin Habets | 58d784a | 2007-12-11 03:37:04 -0800 | [diff] [blame] | 1553 | num_sunzilog++; |
David S. Miller | 8a84eb1 | 2006-07-19 22:55:08 -0700 | [diff] [blame] | 1554 | if (of_find_property(dp, "keyboard", NULL)) |
| 1555 | num_keybms++; |
| 1556 | } |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1557 | |
Martin Habets | 58d784a | 2007-12-11 03:37:04 -0800 | [diff] [blame] | 1558 | if (num_sunzilog) { |
Martin Habets | 58d784a | 2007-12-11 03:37:04 -0800 | [diff] [blame] | 1559 | err = sunzilog_alloc_tables(num_sunzilog); |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1560 | if (err) |
David S. Miller | 67e23a1 | 2006-07-17 21:07:17 -0700 | [diff] [blame] | 1561 | goto out; |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1562 | |
Robert Reif | 227739b | 2008-04-24 03:37:51 -0700 | [diff] [blame] | 1563 | uart_chip_count = num_sunzilog - num_keybms; |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1564 | |
Robert Reif | 227739b | 2008-04-24 03:37:51 -0700 | [diff] [blame] | 1565 | err = sunserial_register_minors(&sunzilog_reg, |
| 1566 | uart_chip_count * 2); |
David S. Miller | 67e23a1 | 2006-07-17 21:07:17 -0700 | [diff] [blame] | 1567 | if (err) |
| 1568 | goto out_free_tables; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1569 | } |
| 1570 | |
Grant Likely | 793218d | 2011-02-22 21:10:26 -0700 | [diff] [blame] | 1571 | err = platform_driver_register(&zs_driver); |
David S. Miller | 67e23a1 | 2006-07-17 21:07:17 -0700 | [diff] [blame] | 1572 | if (err) |
| 1573 | goto out_unregister_uart; |
| 1574 | |
Sam Ravnborg | ca6f327 | 2012-04-04 09:35:06 +0200 | [diff] [blame] | 1575 | if (zilog_irq) { |
Mark Fortescue | 7cc5c85 | 2007-05-09 13:49:04 -0700 | [diff] [blame] | 1576 | struct uart_sunzilog_port *up = sunzilog_irq_chain; |
David S. Miller | 67e23a1 | 2006-07-17 21:07:17 -0700 | [diff] [blame] | 1577 | err = request_irq(zilog_irq, sunzilog_interrupt, IRQF_SHARED, |
| 1578 | "zs", sunzilog_irq_chain); |
| 1579 | if (err) |
| 1580 | goto out_unregister_driver; |
Mark Fortescue | 7cc5c85 | 2007-05-09 13:49:04 -0700 | [diff] [blame] | 1581 | |
| 1582 | /* Enable Interrupts */ |
| 1583 | while (up) { |
| 1584 | struct zilog_channel __iomem *channel; |
| 1585 | |
| 1586 | /* printk (KERN_INFO "Enable IRQ for ZILOG Hardware %p\n", up); */ |
| 1587 | channel = ZILOG_CHANNEL_FROM_PORT(&up->port); |
| 1588 | up->flags |= SUNZILOG_FLAG_ISR_HANDLER; |
| 1589 | up->curregs[R9] |= MIE; |
| 1590 | write_zsreg(channel, R9, up->curregs[R9]); |
| 1591 | up = up->next; |
| 1592 | } |
David S. Miller | 67e23a1 | 2006-07-17 21:07:17 -0700 | [diff] [blame] | 1593 | } |
| 1594 | |
| 1595 | out: |
| 1596 | return err; |
| 1597 | |
| 1598 | out_unregister_driver: |
Grant Likely | 793218d | 2011-02-22 21:10:26 -0700 | [diff] [blame] | 1599 | platform_driver_unregister(&zs_driver); |
David S. Miller | 67e23a1 | 2006-07-17 21:07:17 -0700 | [diff] [blame] | 1600 | |
| 1601 | out_unregister_uart: |
Martin Habets | 58d784a | 2007-12-11 03:37:04 -0800 | [diff] [blame] | 1602 | if (num_sunzilog) { |
| 1603 | sunserial_unregister_minors(&sunzilog_reg, num_sunzilog); |
David S. Miller | 67e23a1 | 2006-07-17 21:07:17 -0700 | [diff] [blame] | 1604 | sunzilog_reg.cons = NULL; |
| 1605 | } |
| 1606 | |
| 1607 | out_free_tables: |
| 1608 | sunzilog_free_tables(); |
| 1609 | goto out; |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1610 | } |
| 1611 | |
| 1612 | static void __exit sunzilog_exit(void) |
| 1613 | { |
Grant Likely | 793218d | 2011-02-22 21:10:26 -0700 | [diff] [blame] | 1614 | platform_driver_unregister(&zs_driver); |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1615 | |
Sam Ravnborg | ca6f327 | 2012-04-04 09:35:06 +0200 | [diff] [blame] | 1616 | if (zilog_irq) { |
Mark Fortescue | 7cc5c85 | 2007-05-09 13:49:04 -0700 | [diff] [blame] | 1617 | struct uart_sunzilog_port *up = sunzilog_irq_chain; |
| 1618 | |
| 1619 | /* Disable Interrupts */ |
| 1620 | while (up) { |
| 1621 | struct zilog_channel __iomem *channel; |
| 1622 | |
| 1623 | /* printk (KERN_INFO "Disable IRQ for ZILOG Hardware %p\n", up); */ |
| 1624 | channel = ZILOG_CHANNEL_FROM_PORT(&up->port); |
| 1625 | up->flags &= ~SUNZILOG_FLAG_ISR_HANDLER; |
| 1626 | up->curregs[R9] &= ~MIE; |
| 1627 | write_zsreg(channel, R9, up->curregs[R9]); |
| 1628 | up = up->next; |
| 1629 | } |
| 1630 | |
David S. Miller | 4fa97dc | 2006-06-29 15:13:40 -0700 | [diff] [blame] | 1631 | free_irq(zilog_irq, sunzilog_irq_chain); |
Alan Cox | d4e33fa | 2012-01-26 17:44:09 +0000 | [diff] [blame] | 1632 | zilog_irq = 0; |
David S. Miller | 4fa97dc | 2006-06-29 15:13:40 -0700 | [diff] [blame] | 1633 | } |
| 1634 | |
Martin Habets | 58d784a | 2007-12-11 03:37:04 -0800 | [diff] [blame] | 1635 | if (sunzilog_reg.nr) { |
| 1636 | sunserial_unregister_minors(&sunzilog_reg, sunzilog_reg.nr); |
David S. Miller | 3676463 | 2006-06-29 15:13:17 -0700 | [diff] [blame] | 1637 | sunzilog_free_tables(); |
| 1638 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1639 | } |
| 1640 | |
| 1641 | module_init(sunzilog_init); |
| 1642 | module_exit(sunzilog_exit); |
| 1643 | |
| 1644 | MODULE_AUTHOR("David S. Miller"); |
| 1645 | MODULE_DESCRIPTION("Sun Zilog serial port driver"); |
David S. Miller | 9efc371 | 2006-06-29 15:14:17 -0700 | [diff] [blame] | 1646 | MODULE_VERSION("2.0"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1647 | MODULE_LICENSE("GPL"); |