Adrian Bunk | d87a6d9 | 2008-07-16 21:53:31 +0100 | [diff] [blame] | 1 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | * su.c: Small serial driver for keyboard/mouse interface on sparc32/PCI |
| 3 | * |
| 4 | * Copyright (C) 1997 Eddie C. Dost (ecd@skynet.be) |
| 5 | * Copyright (C) 1998-1999 Pete Zaitcev (zaitcev@yahoo.com) |
| 6 | * |
| 7 | * This is mainly a variation of 8250.c, credits go to authors mentioned |
| 8 | * therein. In fact this driver should be merged into the generic 8250.c |
| 9 | * infrastructure perhaps using a 8250_sparc.c module. |
| 10 | * |
| 11 | * Fixed to use tty_get_baud_rate(). |
| 12 | * Theodore Ts'o <tytso@mit.edu>, 2001-Oct-12 |
| 13 | * |
| 14 | * Converted to new 2.5.x UART layer. |
David S. Miller | 9efc371 | 2006-06-29 15:14:17 -0700 | [diff] [blame] | 15 | * David S. Miller (davem@davemloft.net), 2002-Jul-29 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 16 | */ |
| 17 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | #include <linux/module.h> |
| 19 | #include <linux/kernel.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | #include <linux/spinlock.h> |
| 21 | #include <linux/errno.h> |
| 22 | #include <linux/tty.h> |
| 23 | #include <linux/tty_flip.h> |
| 24 | #include <linux/major.h> |
| 25 | #include <linux/string.h> |
| 26 | #include <linux/ptrace.h> |
| 27 | #include <linux/ioport.h> |
| 28 | #include <linux/circ_buf.h> |
| 29 | #include <linux/serial.h> |
| 30 | #include <linux/sysrq.h> |
| 31 | #include <linux/console.h> |
| 32 | #ifdef CONFIG_SERIO |
| 33 | #include <linux/serio.h> |
| 34 | #endif |
| 35 | #include <linux/serial_reg.h> |
| 36 | #include <linux/init.h> |
| 37 | #include <linux/delay.h> |
Stephen Rothwell | c6ed413 | 2008-08-11 14:30:53 -0700 | [diff] [blame] | 38 | #include <linux/of_device.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | |
| 40 | #include <asm/io.h> |
| 41 | #include <asm/irq.h> |
David S. Miller | 1708d24 | 2006-06-29 15:14:03 -0700 | [diff] [blame] | 42 | #include <asm/prom.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | |
| 44 | #if defined(CONFIG_SERIAL_SUNSU_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) |
| 45 | #define SUPPORT_SYSRQ |
| 46 | #endif |
| 47 | |
| 48 | #include <linux/serial_core.h> |
| 49 | |
| 50 | #include "suncore.h" |
| 51 | |
| 52 | /* We are on a NS PC87303 clocked with 24.0 MHz, which results |
| 53 | * in a UART clock of 1.8462 MHz. |
| 54 | */ |
| 55 | #define SU_BASE_BAUD (1846200 / 16) |
| 56 | |
| 57 | enum su_type { SU_PORT_NONE, SU_PORT_MS, SU_PORT_KBD, SU_PORT_PORT }; |
| 58 | static char *su_typev[] = { "su(???)", "su(mouse)", "su(kbd)", "su(serial)" }; |
| 59 | |
| 60 | /* |
| 61 | * Here we define the default xmit fifo size used for each type of UART. |
| 62 | */ |
| 63 | static const struct serial_uart_config uart_config[PORT_MAX_8250+1] = { |
| 64 | { "unknown", 1, 0 }, |
| 65 | { "8250", 1, 0 }, |
| 66 | { "16450", 1, 0 }, |
| 67 | { "16550", 1, 0 }, |
| 68 | { "16550A", 16, UART_CLEAR_FIFO | UART_USE_FIFO }, |
| 69 | { "Cirrus", 1, 0 }, |
| 70 | { "ST16650", 1, UART_CLEAR_FIFO | UART_STARTECH }, |
| 71 | { "ST16650V2", 32, UART_CLEAR_FIFO | UART_USE_FIFO | UART_STARTECH }, |
| 72 | { "TI16750", 64, UART_CLEAR_FIFO | UART_USE_FIFO }, |
| 73 | { "Startech", 1, 0 }, |
| 74 | { "16C950/954", 128, UART_CLEAR_FIFO | UART_USE_FIFO }, |
| 75 | { "ST16654", 64, UART_CLEAR_FIFO | UART_USE_FIFO | UART_STARTECH }, |
| 76 | { "XR16850", 128, UART_CLEAR_FIFO | UART_USE_FIFO | UART_STARTECH }, |
| 77 | { "RSA", 2048, UART_CLEAR_FIFO | UART_USE_FIFO } |
| 78 | }; |
| 79 | |
| 80 | struct uart_sunsu_port { |
| 81 | struct uart_port port; |
| 82 | unsigned char acr; |
| 83 | unsigned char ier; |
| 84 | unsigned short rev; |
| 85 | unsigned char lcr; |
| 86 | unsigned int lsr_break_flag; |
| 87 | unsigned int cflag; |
| 88 | |
| 89 | /* Probing information. */ |
| 90 | enum su_type su_type; |
| 91 | unsigned int type_probed; /* XXX Stupid */ |
David S. Miller | 1708d24 | 2006-06-29 15:14:03 -0700 | [diff] [blame] | 92 | unsigned long reg_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | |
| 94 | #ifdef CONFIG_SERIO |
David S. Miller | 1708d24 | 2006-06-29 15:14:03 -0700 | [diff] [blame] | 95 | struct serio serio; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | int serio_open; |
| 97 | #endif |
| 98 | }; |
| 99 | |
Adrian Bunk | 41c28ff | 2006-03-23 03:00:56 -0800 | [diff] [blame] | 100 | static unsigned int serial_in(struct uart_sunsu_port *up, int offset) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | { |
| 102 | offset <<= up->port.regshift; |
| 103 | |
| 104 | switch (up->port.iotype) { |
Russell King | 9b4a161 | 2006-02-05 10:48:10 +0000 | [diff] [blame] | 105 | case UPIO_HUB6: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | outb(up->port.hub6 - 1 + offset, up->port.iobase); |
| 107 | return inb(up->port.iobase + 1); |
| 108 | |
Russell King | 9b4a161 | 2006-02-05 10:48:10 +0000 | [diff] [blame] | 109 | case UPIO_MEM: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | return readb(up->port.membase + offset); |
| 111 | |
| 112 | default: |
| 113 | return inb(up->port.iobase + offset); |
| 114 | } |
| 115 | } |
| 116 | |
Adrian Bunk | 41c28ff | 2006-03-23 03:00:56 -0800 | [diff] [blame] | 117 | static void serial_out(struct uart_sunsu_port *up, int offset, int value) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | { |
| 119 | #ifndef CONFIG_SPARC64 |
| 120 | /* |
| 121 | * MrCoffee has weird schematics: IRQ4 & P10(?) pins of SuperIO are |
| 122 | * connected with a gate then go to SlavIO. When IRQ4 goes tristated |
| 123 | * gate outputs a logical one. Since we use level triggered interrupts |
| 124 | * we have lockup and watchdog reset. We cannot mask IRQ because |
| 125 | * keyboard shares IRQ with us (Word has it as Bob Smelik's design). |
| 126 | * This problem is similar to what Alpha people suffer, see serial.c. |
| 127 | */ |
| 128 | if (offset == UART_MCR) |
| 129 | value |= UART_MCR_OUT2; |
| 130 | #endif |
| 131 | offset <<= up->port.regshift; |
| 132 | |
| 133 | switch (up->port.iotype) { |
Russell King | 9b4a161 | 2006-02-05 10:48:10 +0000 | [diff] [blame] | 134 | case UPIO_HUB6: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 135 | outb(up->port.hub6 - 1 + offset, up->port.iobase); |
| 136 | outb(value, up->port.iobase + 1); |
| 137 | break; |
| 138 | |
Russell King | 9b4a161 | 2006-02-05 10:48:10 +0000 | [diff] [blame] | 139 | case UPIO_MEM: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | writeb(value, up->port.membase + offset); |
| 141 | break; |
| 142 | |
| 143 | default: |
| 144 | outb(value, up->port.iobase + offset); |
| 145 | } |
| 146 | } |
| 147 | |
| 148 | /* |
| 149 | * We used to support using pause I/O for certain machines. We |
| 150 | * haven't supported this for a while, but just in case it's badly |
| 151 | * needed for certain old 386 machines, I've left these #define's |
| 152 | * in.... |
| 153 | */ |
| 154 | #define serial_inp(up, offset) serial_in(up, offset) |
| 155 | #define serial_outp(up, offset, value) serial_out(up, offset, value) |
| 156 | |
| 157 | |
| 158 | /* |
| 159 | * For the 16C950 |
| 160 | */ |
| 161 | static void serial_icr_write(struct uart_sunsu_port *up, int offset, int value) |
| 162 | { |
| 163 | serial_out(up, UART_SCR, offset); |
| 164 | serial_out(up, UART_ICR, value); |
| 165 | } |
| 166 | |
| 167 | #if 0 /* Unused currently */ |
| 168 | static unsigned int serial_icr_read(struct uart_sunsu_port *up, int offset) |
| 169 | { |
| 170 | unsigned int value; |
| 171 | |
| 172 | serial_icr_write(up, UART_ACR, up->acr | UART_ACR_ICRRD); |
| 173 | serial_out(up, UART_SCR, offset); |
| 174 | value = serial_in(up, UART_ICR); |
| 175 | serial_icr_write(up, UART_ACR, up->acr); |
| 176 | |
| 177 | return value; |
| 178 | } |
| 179 | #endif |
| 180 | |
| 181 | #ifdef CONFIG_SERIAL_8250_RSA |
| 182 | /* |
| 183 | * Attempts to turn on the RSA FIFO. Returns zero on failure. |
| 184 | * We set the port uart clock rate if we succeed. |
| 185 | */ |
| 186 | static int __enable_rsa(struct uart_sunsu_port *up) |
| 187 | { |
| 188 | unsigned char mode; |
| 189 | int result; |
| 190 | |
| 191 | mode = serial_inp(up, UART_RSA_MSR); |
| 192 | result = mode & UART_RSA_MSR_FIFO; |
| 193 | |
| 194 | if (!result) { |
| 195 | serial_outp(up, UART_RSA_MSR, mode | UART_RSA_MSR_FIFO); |
| 196 | mode = serial_inp(up, UART_RSA_MSR); |
| 197 | result = mode & UART_RSA_MSR_FIFO; |
| 198 | } |
| 199 | |
| 200 | if (result) |
| 201 | up->port.uartclk = SERIAL_RSA_BAUD_BASE * 16; |
| 202 | |
| 203 | return result; |
| 204 | } |
| 205 | |
| 206 | static void enable_rsa(struct uart_sunsu_port *up) |
| 207 | { |
| 208 | if (up->port.type == PORT_RSA) { |
| 209 | if (up->port.uartclk != SERIAL_RSA_BAUD_BASE * 16) { |
| 210 | spin_lock_irq(&up->port.lock); |
| 211 | __enable_rsa(up); |
| 212 | spin_unlock_irq(&up->port.lock); |
| 213 | } |
| 214 | if (up->port.uartclk == SERIAL_RSA_BAUD_BASE * 16) |
| 215 | serial_outp(up, UART_RSA_FRR, 0); |
| 216 | } |
| 217 | } |
| 218 | |
| 219 | /* |
| 220 | * Attempts to turn off the RSA FIFO. Returns zero on failure. |
| 221 | * It is unknown why interrupts were disabled in here. However, |
| 222 | * the caller is expected to preserve this behaviour by grabbing |
| 223 | * the spinlock before calling this function. |
| 224 | */ |
| 225 | static void disable_rsa(struct uart_sunsu_port *up) |
| 226 | { |
| 227 | unsigned char mode; |
| 228 | int result; |
| 229 | |
| 230 | if (up->port.type == PORT_RSA && |
| 231 | up->port.uartclk == SERIAL_RSA_BAUD_BASE * 16) { |
| 232 | spin_lock_irq(&up->port.lock); |
| 233 | |
| 234 | mode = serial_inp(up, UART_RSA_MSR); |
| 235 | result = !(mode & UART_RSA_MSR_FIFO); |
| 236 | |
| 237 | if (!result) { |
| 238 | serial_outp(up, UART_RSA_MSR, mode & ~UART_RSA_MSR_FIFO); |
| 239 | mode = serial_inp(up, UART_RSA_MSR); |
| 240 | result = !(mode & UART_RSA_MSR_FIFO); |
| 241 | } |
| 242 | |
| 243 | if (result) |
| 244 | up->port.uartclk = SERIAL_RSA_BAUD_BASE_LO * 16; |
| 245 | spin_unlock_irq(&up->port.lock); |
| 246 | } |
| 247 | } |
| 248 | #endif /* CONFIG_SERIAL_8250_RSA */ |
| 249 | |
Russell King | b129a8c | 2005-08-31 10:12:14 +0100 | [diff] [blame] | 250 | static inline void __stop_tx(struct uart_sunsu_port *p) |
| 251 | { |
| 252 | if (p->ier & UART_IER_THRI) { |
| 253 | p->ier &= ~UART_IER_THRI; |
| 254 | serial_out(p, UART_IER, p->ier); |
| 255 | } |
| 256 | } |
| 257 | |
| 258 | static void sunsu_stop_tx(struct uart_port *port) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 259 | { |
| 260 | struct uart_sunsu_port *up = (struct uart_sunsu_port *) port; |
| 261 | |
Russell King | b129a8c | 2005-08-31 10:12:14 +0100 | [diff] [blame] | 262 | __stop_tx(up); |
| 263 | |
Al Viro | 3d9c994 | 2005-09-05 23:35:05 -0700 | [diff] [blame] | 264 | /* |
| 265 | * We really want to stop the transmitter from sending. |
| 266 | */ |
| 267 | if (up->port.type == PORT_16C950) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 268 | up->acr |= UART_ACR_TXDIS; |
| 269 | serial_icr_write(up, UART_ACR, up->acr); |
| 270 | } |
| 271 | } |
| 272 | |
Russell King | b129a8c | 2005-08-31 10:12:14 +0100 | [diff] [blame] | 273 | static void sunsu_start_tx(struct uart_port *port) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 274 | { |
| 275 | struct uart_sunsu_port *up = (struct uart_sunsu_port *) port; |
| 276 | |
| 277 | if (!(up->ier & UART_IER_THRI)) { |
| 278 | up->ier |= UART_IER_THRI; |
| 279 | serial_out(up, UART_IER, up->ier); |
| 280 | } |
Al Viro | 3d9c994 | 2005-09-05 23:35:05 -0700 | [diff] [blame] | 281 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | /* |
Al Viro | 3d9c994 | 2005-09-05 23:35:05 -0700 | [diff] [blame] | 283 | * Re-enable the transmitter if we disabled it. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | */ |
Al Viro | 3d9c994 | 2005-09-05 23:35:05 -0700 | [diff] [blame] | 285 | if (up->port.type == PORT_16C950 && up->acr & UART_ACR_TXDIS) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 286 | up->acr &= ~UART_ACR_TXDIS; |
| 287 | serial_icr_write(up, UART_ACR, up->acr); |
| 288 | } |
| 289 | } |
| 290 | |
| 291 | static void sunsu_stop_rx(struct uart_port *port) |
| 292 | { |
| 293 | struct uart_sunsu_port *up = (struct uart_sunsu_port *) port; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 294 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 295 | up->ier &= ~UART_IER_RLSI; |
| 296 | up->port.read_status_mask &= ~UART_LSR_DR; |
| 297 | serial_out(up, UART_IER, up->ier); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 298 | } |
| 299 | |
| 300 | static void sunsu_enable_ms(struct uart_port *port) |
| 301 | { |
| 302 | struct uart_sunsu_port *up = (struct uart_sunsu_port *) port; |
| 303 | unsigned long flags; |
| 304 | |
| 305 | spin_lock_irqsave(&up->port.lock, flags); |
| 306 | up->ier |= UART_IER_MSI; |
| 307 | serial_out(up, UART_IER, up->ier); |
| 308 | spin_unlock_irqrestore(&up->port.lock, flags); |
| 309 | } |
| 310 | |
Adrian Bunk | 41c28ff | 2006-03-23 03:00:56 -0800 | [diff] [blame] | 311 | static struct tty_struct * |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 312 | receive_chars(struct uart_sunsu_port *up, unsigned char *status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 313 | { |
Stephen Rothwell | 2f7a697 | 2008-07-16 21:54:11 +0100 | [diff] [blame] | 314 | struct tty_struct *tty = up->port.info->port.tty; |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 315 | unsigned char ch, flag; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 316 | int max_count = 256; |
| 317 | int saw_console_brk = 0; |
| 318 | |
| 319 | do { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | ch = serial_inp(up, UART_RX); |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 321 | flag = TTY_NORMAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 322 | up->port.icount.rx++; |
| 323 | |
| 324 | if (unlikely(*status & (UART_LSR_BI | UART_LSR_PE | |
| 325 | UART_LSR_FE | UART_LSR_OE))) { |
| 326 | /* |
| 327 | * For statistics only |
| 328 | */ |
| 329 | if (*status & UART_LSR_BI) { |
| 330 | *status &= ~(UART_LSR_FE | UART_LSR_PE); |
| 331 | up->port.icount.brk++; |
| 332 | if (up->port.cons != NULL && |
| 333 | up->port.line == up->port.cons->index) |
| 334 | saw_console_brk = 1; |
| 335 | /* |
| 336 | * We do the SysRQ and SAK checking |
| 337 | * here because otherwise the break |
| 338 | * may get masked by ignore_status_mask |
| 339 | * or read_status_mask. |
| 340 | */ |
| 341 | if (uart_handle_break(&up->port)) |
| 342 | goto ignore_char; |
| 343 | } else if (*status & UART_LSR_PE) |
| 344 | up->port.icount.parity++; |
| 345 | else if (*status & UART_LSR_FE) |
| 346 | up->port.icount.frame++; |
| 347 | if (*status & UART_LSR_OE) |
| 348 | up->port.icount.overrun++; |
| 349 | |
| 350 | /* |
| 351 | * Mask off conditions which should be ingored. |
| 352 | */ |
| 353 | *status &= up->port.read_status_mask; |
| 354 | |
| 355 | if (up->port.cons != NULL && |
| 356 | up->port.line == up->port.cons->index) { |
| 357 | /* Recover the break flag from console xmit */ |
| 358 | *status |= up->lsr_break_flag; |
| 359 | up->lsr_break_flag = 0; |
| 360 | } |
| 361 | |
| 362 | if (*status & UART_LSR_BI) { |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 363 | flag = TTY_BREAK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | } else if (*status & UART_LSR_PE) |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 365 | flag = TTY_PARITY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 366 | else if (*status & UART_LSR_FE) |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 367 | flag = TTY_FRAME; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 368 | } |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 369 | if (uart_handle_sysrq_char(&up->port, ch)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 370 | goto ignore_char; |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 371 | if ((*status & up->port.ignore_status_mask) == 0) |
| 372 | tty_insert_flip_char(tty, ch, flag); |
| 373 | if (*status & UART_LSR_OE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 374 | /* |
| 375 | * Overrun is special, since it's reported |
| 376 | * immediately, and doesn't affect the current |
| 377 | * character. |
| 378 | */ |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 379 | tty_insert_flip_char(tty, 0, TTY_OVERRUN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | ignore_char: |
| 381 | *status = serial_inp(up, UART_LSR); |
| 382 | } while ((*status & UART_LSR_DR) && (max_count-- > 0)); |
| 383 | |
| 384 | if (saw_console_brk) |
| 385 | sun_do_break(); |
| 386 | |
| 387 | return tty; |
| 388 | } |
| 389 | |
Adrian Bunk | 41c28ff | 2006-03-23 03:00:56 -0800 | [diff] [blame] | 390 | static void transmit_chars(struct uart_sunsu_port *up) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 391 | { |
| 392 | struct circ_buf *xmit = &up->port.info->xmit; |
| 393 | int count; |
| 394 | |
| 395 | if (up->port.x_char) { |
| 396 | serial_outp(up, UART_TX, up->port.x_char); |
| 397 | up->port.icount.tx++; |
| 398 | up->port.x_char = 0; |
| 399 | return; |
| 400 | } |
Russell King | b129a8c | 2005-08-31 10:12:14 +0100 | [diff] [blame] | 401 | if (uart_tx_stopped(&up->port)) { |
| 402 | sunsu_stop_tx(&up->port); |
| 403 | return; |
| 404 | } |
| 405 | if (uart_circ_empty(xmit)) { |
| 406 | __stop_tx(up); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 407 | return; |
| 408 | } |
| 409 | |
| 410 | count = up->port.fifosize; |
| 411 | do { |
| 412 | serial_out(up, UART_TX, xmit->buf[xmit->tail]); |
| 413 | xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); |
| 414 | up->port.icount.tx++; |
| 415 | if (uart_circ_empty(xmit)) |
| 416 | break; |
| 417 | } while (--count > 0); |
| 418 | |
| 419 | if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) |
| 420 | uart_write_wakeup(&up->port); |
| 421 | |
| 422 | if (uart_circ_empty(xmit)) |
Russell King | b129a8c | 2005-08-31 10:12:14 +0100 | [diff] [blame] | 423 | __stop_tx(up); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 424 | } |
| 425 | |
Adrian Bunk | 41c28ff | 2006-03-23 03:00:56 -0800 | [diff] [blame] | 426 | static void check_modem_status(struct uart_sunsu_port *up) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | { |
| 428 | int status; |
| 429 | |
| 430 | status = serial_in(up, UART_MSR); |
| 431 | |
| 432 | if ((status & UART_MSR_ANY_DELTA) == 0) |
| 433 | return; |
| 434 | |
| 435 | if (status & UART_MSR_TERI) |
| 436 | up->port.icount.rng++; |
| 437 | if (status & UART_MSR_DDSR) |
| 438 | up->port.icount.dsr++; |
| 439 | if (status & UART_MSR_DDCD) |
| 440 | uart_handle_dcd_change(&up->port, status & UART_MSR_DCD); |
| 441 | if (status & UART_MSR_DCTS) |
| 442 | uart_handle_cts_change(&up->port, status & UART_MSR_CTS); |
| 443 | |
| 444 | wake_up_interruptible(&up->port.info->delta_msr_wait); |
| 445 | } |
| 446 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 447 | static irqreturn_t sunsu_serial_interrupt(int irq, void *dev_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 448 | { |
| 449 | struct uart_sunsu_port *up = dev_id; |
| 450 | unsigned long flags; |
| 451 | unsigned char status; |
| 452 | |
| 453 | spin_lock_irqsave(&up->port.lock, flags); |
| 454 | |
| 455 | do { |
| 456 | struct tty_struct *tty; |
| 457 | |
| 458 | status = serial_inp(up, UART_LSR); |
| 459 | tty = NULL; |
| 460 | if (status & UART_LSR_DR) |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 461 | tty = receive_chars(up, &status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 462 | check_modem_status(up); |
| 463 | if (status & UART_LSR_THRE) |
| 464 | transmit_chars(up); |
| 465 | |
| 466 | spin_unlock_irqrestore(&up->port.lock, flags); |
| 467 | |
| 468 | if (tty) |
| 469 | tty_flip_buffer_push(tty); |
| 470 | |
| 471 | spin_lock_irqsave(&up->port.lock, flags); |
| 472 | |
| 473 | } while (!(serial_in(up, UART_IIR) & UART_IIR_NO_INT)); |
| 474 | |
| 475 | spin_unlock_irqrestore(&up->port.lock, flags); |
| 476 | |
| 477 | return IRQ_HANDLED; |
| 478 | } |
| 479 | |
| 480 | /* Separate interrupt handling path for keyboard/mouse ports. */ |
| 481 | |
| 482 | static void |
| 483 | sunsu_change_speed(struct uart_port *port, unsigned int cflag, |
| 484 | unsigned int iflag, unsigned int quot); |
| 485 | |
| 486 | static void sunsu_change_mouse_baud(struct uart_sunsu_port *up) |
| 487 | { |
| 488 | unsigned int cur_cflag = up->cflag; |
| 489 | int quot, new_baud; |
| 490 | |
| 491 | up->cflag &= ~CBAUD; |
| 492 | up->cflag |= suncore_mouse_baud_cflag_next(cur_cflag, &new_baud); |
| 493 | |
| 494 | quot = up->port.uartclk / (16 * new_baud); |
| 495 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 496 | sunsu_change_speed(&up->port, up->cflag, 0, quot); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 497 | } |
| 498 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 499 | static void receive_kbd_ms_chars(struct uart_sunsu_port *up, int is_break) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 500 | { |
| 501 | do { |
| 502 | unsigned char ch = serial_inp(up, UART_RX); |
| 503 | |
| 504 | /* Stop-A is handled by drivers/char/keyboard.c now. */ |
| 505 | if (up->su_type == SU_PORT_KBD) { |
| 506 | #ifdef CONFIG_SERIO |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 507 | serio_interrupt(&up->serio, ch, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 508 | #endif |
| 509 | } else if (up->su_type == SU_PORT_MS) { |
| 510 | int ret = suncore_mouse_baud_detection(ch, is_break); |
| 511 | |
| 512 | switch (ret) { |
| 513 | case 2: |
| 514 | sunsu_change_mouse_baud(up); |
| 515 | /* fallthru */ |
| 516 | case 1: |
| 517 | break; |
| 518 | |
| 519 | case 0: |
| 520 | #ifdef CONFIG_SERIO |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 521 | serio_interrupt(&up->serio, ch, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 522 | #endif |
| 523 | break; |
| 524 | }; |
| 525 | } |
| 526 | } while (serial_in(up, UART_LSR) & UART_LSR_DR); |
| 527 | } |
| 528 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 529 | static irqreturn_t sunsu_kbd_ms_interrupt(int irq, void *dev_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 530 | { |
| 531 | struct uart_sunsu_port *up = dev_id; |
| 532 | |
| 533 | if (!(serial_in(up, UART_IIR) & UART_IIR_NO_INT)) { |
| 534 | unsigned char status = serial_inp(up, UART_LSR); |
| 535 | |
| 536 | if ((status & UART_LSR_DR) || (status & UART_LSR_BI)) |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 537 | receive_kbd_ms_chars(up, (status & UART_LSR_BI) != 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 538 | } |
| 539 | |
| 540 | return IRQ_HANDLED; |
| 541 | } |
| 542 | |
| 543 | static unsigned int sunsu_tx_empty(struct uart_port *port) |
| 544 | { |
| 545 | struct uart_sunsu_port *up = (struct uart_sunsu_port *) port; |
| 546 | unsigned long flags; |
| 547 | unsigned int ret; |
| 548 | |
| 549 | spin_lock_irqsave(&up->port.lock, flags); |
| 550 | ret = serial_in(up, UART_LSR) & UART_LSR_TEMT ? TIOCSER_TEMT : 0; |
| 551 | spin_unlock_irqrestore(&up->port.lock, flags); |
| 552 | |
| 553 | return ret; |
| 554 | } |
| 555 | |
| 556 | static unsigned int sunsu_get_mctrl(struct uart_port *port) |
| 557 | { |
| 558 | struct uart_sunsu_port *up = (struct uart_sunsu_port *) port; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | unsigned char status; |
| 560 | unsigned int ret; |
| 561 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 562 | status = serial_in(up, UART_MSR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 563 | |
| 564 | ret = 0; |
| 565 | if (status & UART_MSR_DCD) |
| 566 | ret |= TIOCM_CAR; |
| 567 | if (status & UART_MSR_RI) |
| 568 | ret |= TIOCM_RNG; |
| 569 | if (status & UART_MSR_DSR) |
| 570 | ret |= TIOCM_DSR; |
| 571 | if (status & UART_MSR_CTS) |
| 572 | ret |= TIOCM_CTS; |
| 573 | return ret; |
| 574 | } |
| 575 | |
| 576 | static void sunsu_set_mctrl(struct uart_port *port, unsigned int mctrl) |
| 577 | { |
| 578 | struct uart_sunsu_port *up = (struct uart_sunsu_port *) port; |
| 579 | unsigned char mcr = 0; |
| 580 | |
| 581 | if (mctrl & TIOCM_RTS) |
| 582 | mcr |= UART_MCR_RTS; |
| 583 | if (mctrl & TIOCM_DTR) |
| 584 | mcr |= UART_MCR_DTR; |
| 585 | if (mctrl & TIOCM_OUT1) |
| 586 | mcr |= UART_MCR_OUT1; |
| 587 | if (mctrl & TIOCM_OUT2) |
| 588 | mcr |= UART_MCR_OUT2; |
| 589 | if (mctrl & TIOCM_LOOP) |
| 590 | mcr |= UART_MCR_LOOP; |
| 591 | |
| 592 | serial_out(up, UART_MCR, mcr); |
| 593 | } |
| 594 | |
| 595 | static void sunsu_break_ctl(struct uart_port *port, int break_state) |
| 596 | { |
| 597 | struct uart_sunsu_port *up = (struct uart_sunsu_port *) port; |
| 598 | unsigned long flags; |
| 599 | |
| 600 | spin_lock_irqsave(&up->port.lock, flags); |
| 601 | if (break_state == -1) |
| 602 | up->lcr |= UART_LCR_SBC; |
| 603 | else |
| 604 | up->lcr &= ~UART_LCR_SBC; |
| 605 | serial_out(up, UART_LCR, up->lcr); |
| 606 | spin_unlock_irqrestore(&up->port.lock, flags); |
| 607 | } |
| 608 | |
| 609 | static int sunsu_startup(struct uart_port *port) |
| 610 | { |
| 611 | struct uart_sunsu_port *up = (struct uart_sunsu_port *) port; |
| 612 | unsigned long flags; |
| 613 | int retval; |
| 614 | |
| 615 | if (up->port.type == PORT_16C950) { |
| 616 | /* Wake up and initialize UART */ |
| 617 | up->acr = 0; |
| 618 | serial_outp(up, UART_LCR, 0xBF); |
| 619 | serial_outp(up, UART_EFR, UART_EFR_ECB); |
| 620 | serial_outp(up, UART_IER, 0); |
| 621 | serial_outp(up, UART_LCR, 0); |
| 622 | serial_icr_write(up, UART_CSR, 0); /* Reset the UART */ |
| 623 | serial_outp(up, UART_LCR, 0xBF); |
| 624 | serial_outp(up, UART_EFR, UART_EFR_ECB); |
| 625 | serial_outp(up, UART_LCR, 0); |
| 626 | } |
| 627 | |
| 628 | #ifdef CONFIG_SERIAL_8250_RSA |
| 629 | /* |
| 630 | * If this is an RSA port, see if we can kick it up to the |
| 631 | * higher speed clock. |
| 632 | */ |
| 633 | enable_rsa(up); |
| 634 | #endif |
| 635 | |
| 636 | /* |
| 637 | * Clear the FIFO buffers and disable them. |
Alexey Dobriyan | 7f927fc | 2006-03-28 01:56:53 -0800 | [diff] [blame] | 638 | * (they will be reenabled in set_termios()) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 639 | */ |
| 640 | if (uart_config[up->port.type].flags & UART_CLEAR_FIFO) { |
| 641 | serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO); |
| 642 | serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO | |
| 643 | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT); |
| 644 | serial_outp(up, UART_FCR, 0); |
| 645 | } |
| 646 | |
| 647 | /* |
| 648 | * Clear the interrupt registers. |
| 649 | */ |
| 650 | (void) serial_inp(up, UART_LSR); |
| 651 | (void) serial_inp(up, UART_RX); |
| 652 | (void) serial_inp(up, UART_IIR); |
| 653 | (void) serial_inp(up, UART_MSR); |
| 654 | |
| 655 | /* |
| 656 | * At this point, there's no way the LSR could still be 0xff; |
| 657 | * if it is, then bail out, because there's likely no UART |
| 658 | * here. |
| 659 | */ |
Russell King | ce8337c | 2006-01-21 19:28:15 +0000 | [diff] [blame] | 660 | if (!(up->port.flags & UPF_BUGGY_UART) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 661 | (serial_inp(up, UART_LSR) == 0xff)) { |
| 662 | printk("ttyS%d: LSR safety check engaged!\n", up->port.line); |
| 663 | return -ENODEV; |
| 664 | } |
| 665 | |
| 666 | if (up->su_type != SU_PORT_PORT) { |
| 667 | retval = request_irq(up->port.irq, sunsu_kbd_ms_interrupt, |
Thomas Gleixner | 40663cc | 2006-07-01 19:29:43 -0700 | [diff] [blame] | 668 | IRQF_SHARED, su_typev[up->su_type], up); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 669 | } else { |
| 670 | retval = request_irq(up->port.irq, sunsu_serial_interrupt, |
Thomas Gleixner | 40663cc | 2006-07-01 19:29:43 -0700 | [diff] [blame] | 671 | IRQF_SHARED, su_typev[up->su_type], up); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 672 | } |
| 673 | if (retval) { |
| 674 | printk("su: Cannot register IRQ %d\n", up->port.irq); |
| 675 | return retval; |
| 676 | } |
| 677 | |
| 678 | /* |
| 679 | * Now, initialize the UART |
| 680 | */ |
| 681 | serial_outp(up, UART_LCR, UART_LCR_WLEN8); |
| 682 | |
| 683 | spin_lock_irqsave(&up->port.lock, flags); |
| 684 | |
| 685 | up->port.mctrl |= TIOCM_OUT2; |
| 686 | |
| 687 | sunsu_set_mctrl(&up->port, up->port.mctrl); |
| 688 | spin_unlock_irqrestore(&up->port.lock, flags); |
| 689 | |
| 690 | /* |
| 691 | * Finally, enable interrupts. Note: Modem status interrupts |
| 692 | * are set via set_termios(), which will be occurring imminently |
| 693 | * anyway, so we don't enable them here. |
| 694 | */ |
| 695 | up->ier = UART_IER_RLSI | UART_IER_RDI; |
| 696 | serial_outp(up, UART_IER, up->ier); |
| 697 | |
Russell King | ce8337c | 2006-01-21 19:28:15 +0000 | [diff] [blame] | 698 | if (up->port.flags & UPF_FOURPORT) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 699 | unsigned int icp; |
| 700 | /* |
| 701 | * Enable interrupts on the AST Fourport board |
| 702 | */ |
| 703 | icp = (up->port.iobase & 0xfe0) | 0x01f; |
| 704 | outb_p(0x80, icp); |
| 705 | (void) inb_p(icp); |
| 706 | } |
| 707 | |
| 708 | /* |
| 709 | * And clear the interrupt registers again for luck. |
| 710 | */ |
| 711 | (void) serial_inp(up, UART_LSR); |
| 712 | (void) serial_inp(up, UART_RX); |
| 713 | (void) serial_inp(up, UART_IIR); |
| 714 | (void) serial_inp(up, UART_MSR); |
| 715 | |
| 716 | return 0; |
| 717 | } |
| 718 | |
| 719 | static void sunsu_shutdown(struct uart_port *port) |
| 720 | { |
| 721 | struct uart_sunsu_port *up = (struct uart_sunsu_port *) port; |
| 722 | unsigned long flags; |
| 723 | |
| 724 | /* |
| 725 | * Disable interrupts from this port |
| 726 | */ |
| 727 | up->ier = 0; |
| 728 | serial_outp(up, UART_IER, 0); |
| 729 | |
| 730 | spin_lock_irqsave(&up->port.lock, flags); |
Russell King | ce8337c | 2006-01-21 19:28:15 +0000 | [diff] [blame] | 731 | if (up->port.flags & UPF_FOURPORT) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 732 | /* reset interrupts on the AST Fourport board */ |
| 733 | inb((up->port.iobase & 0xfe0) | 0x1f); |
| 734 | up->port.mctrl |= TIOCM_OUT1; |
| 735 | } else |
| 736 | up->port.mctrl &= ~TIOCM_OUT2; |
| 737 | |
| 738 | sunsu_set_mctrl(&up->port, up->port.mctrl); |
| 739 | spin_unlock_irqrestore(&up->port.lock, flags); |
| 740 | |
| 741 | /* |
| 742 | * Disable break condition and FIFOs |
| 743 | */ |
| 744 | serial_out(up, UART_LCR, serial_inp(up, UART_LCR) & ~UART_LCR_SBC); |
| 745 | serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO | |
| 746 | UART_FCR_CLEAR_RCVR | |
| 747 | UART_FCR_CLEAR_XMIT); |
| 748 | serial_outp(up, UART_FCR, 0); |
| 749 | |
| 750 | #ifdef CONFIG_SERIAL_8250_RSA |
| 751 | /* |
| 752 | * Reset the RSA board back to 115kbps compat mode. |
| 753 | */ |
| 754 | disable_rsa(up); |
| 755 | #endif |
| 756 | |
| 757 | /* |
| 758 | * Read data port to reset things. |
| 759 | */ |
| 760 | (void) serial_in(up, UART_RX); |
| 761 | |
| 762 | free_irq(up->port.irq, up); |
| 763 | } |
| 764 | |
| 765 | static void |
| 766 | sunsu_change_speed(struct uart_port *port, unsigned int cflag, |
| 767 | unsigned int iflag, unsigned int quot) |
| 768 | { |
| 769 | struct uart_sunsu_port *up = (struct uart_sunsu_port *) port; |
| 770 | unsigned char cval, fcr = 0; |
| 771 | unsigned long flags; |
| 772 | |
| 773 | switch (cflag & CSIZE) { |
| 774 | case CS5: |
| 775 | cval = 0x00; |
| 776 | break; |
| 777 | case CS6: |
| 778 | cval = 0x01; |
| 779 | break; |
| 780 | case CS7: |
| 781 | cval = 0x02; |
| 782 | break; |
| 783 | default: |
| 784 | case CS8: |
| 785 | cval = 0x03; |
| 786 | break; |
| 787 | } |
| 788 | |
| 789 | if (cflag & CSTOPB) |
| 790 | cval |= 0x04; |
| 791 | if (cflag & PARENB) |
| 792 | cval |= UART_LCR_PARITY; |
| 793 | if (!(cflag & PARODD)) |
| 794 | cval |= UART_LCR_EPAR; |
| 795 | #ifdef CMSPAR |
| 796 | if (cflag & CMSPAR) |
| 797 | cval |= UART_LCR_SPAR; |
| 798 | #endif |
| 799 | |
| 800 | /* |
| 801 | * Work around a bug in the Oxford Semiconductor 952 rev B |
| 802 | * chip which causes it to seriously miscalculate baud rates |
| 803 | * when DLL is 0. |
| 804 | */ |
| 805 | if ((quot & 0xff) == 0 && up->port.type == PORT_16C950 && |
| 806 | up->rev == 0x5201) |
| 807 | quot ++; |
| 808 | |
| 809 | if (uart_config[up->port.type].flags & UART_USE_FIFO) { |
| 810 | if ((up->port.uartclk / quot) < (2400 * 16)) |
| 811 | fcr = UART_FCR_ENABLE_FIFO | UART_FCR_TRIGGER_1; |
| 812 | #ifdef CONFIG_SERIAL_8250_RSA |
| 813 | else if (up->port.type == PORT_RSA) |
| 814 | fcr = UART_FCR_ENABLE_FIFO | UART_FCR_TRIGGER_14; |
| 815 | #endif |
| 816 | else |
| 817 | fcr = UART_FCR_ENABLE_FIFO | UART_FCR_TRIGGER_8; |
| 818 | } |
| 819 | if (up->port.type == PORT_16750) |
| 820 | fcr |= UART_FCR7_64BYTE; |
| 821 | |
| 822 | /* |
| 823 | * Ok, we're now changing the port state. Do it with |
| 824 | * interrupts disabled. |
| 825 | */ |
| 826 | spin_lock_irqsave(&up->port.lock, flags); |
| 827 | |
| 828 | /* |
| 829 | * Update the per-port timeout. |
| 830 | */ |
| 831 | uart_update_timeout(port, cflag, (port->uartclk / (16 * quot))); |
| 832 | |
| 833 | up->port.read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR; |
| 834 | if (iflag & INPCK) |
| 835 | up->port.read_status_mask |= UART_LSR_FE | UART_LSR_PE; |
| 836 | if (iflag & (BRKINT | PARMRK)) |
| 837 | up->port.read_status_mask |= UART_LSR_BI; |
| 838 | |
| 839 | /* |
| 840 | * Characteres to ignore |
| 841 | */ |
| 842 | up->port.ignore_status_mask = 0; |
| 843 | if (iflag & IGNPAR) |
| 844 | up->port.ignore_status_mask |= UART_LSR_PE | UART_LSR_FE; |
| 845 | if (iflag & IGNBRK) { |
| 846 | up->port.ignore_status_mask |= UART_LSR_BI; |
| 847 | /* |
| 848 | * If we're ignoring parity and break indicators, |
| 849 | * ignore overruns too (for real raw support). |
| 850 | */ |
| 851 | if (iflag & IGNPAR) |
| 852 | up->port.ignore_status_mask |= UART_LSR_OE; |
| 853 | } |
| 854 | |
| 855 | /* |
| 856 | * ignore all characters if CREAD is not set |
| 857 | */ |
| 858 | if ((cflag & CREAD) == 0) |
| 859 | up->port.ignore_status_mask |= UART_LSR_DR; |
| 860 | |
| 861 | /* |
| 862 | * CTS flow control flag and modem status interrupts |
| 863 | */ |
| 864 | up->ier &= ~UART_IER_MSI; |
| 865 | if (UART_ENABLE_MS(&up->port, cflag)) |
| 866 | up->ier |= UART_IER_MSI; |
| 867 | |
| 868 | serial_out(up, UART_IER, up->ier); |
| 869 | |
| 870 | if (uart_config[up->port.type].flags & UART_STARTECH) { |
| 871 | serial_outp(up, UART_LCR, 0xBF); |
| 872 | serial_outp(up, UART_EFR, cflag & CRTSCTS ? UART_EFR_CTS :0); |
| 873 | } |
| 874 | serial_outp(up, UART_LCR, cval | UART_LCR_DLAB);/* set DLAB */ |
| 875 | serial_outp(up, UART_DLL, quot & 0xff); /* LS of divisor */ |
| 876 | serial_outp(up, UART_DLM, quot >> 8); /* MS of divisor */ |
| 877 | if (up->port.type == PORT_16750) |
| 878 | serial_outp(up, UART_FCR, fcr); /* set fcr */ |
| 879 | serial_outp(up, UART_LCR, cval); /* reset DLAB */ |
| 880 | up->lcr = cval; /* Save LCR */ |
| 881 | if (up->port.type != PORT_16750) { |
| 882 | if (fcr & UART_FCR_ENABLE_FIFO) { |
| 883 | /* emulated UARTs (Lucent Venus 167x) need two steps */ |
| 884 | serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO); |
| 885 | } |
| 886 | serial_outp(up, UART_FCR, fcr); /* set fcr */ |
| 887 | } |
| 888 | |
| 889 | up->cflag = cflag; |
| 890 | |
| 891 | spin_unlock_irqrestore(&up->port.lock, flags); |
| 892 | } |
| 893 | |
| 894 | static void |
Alan Cox | 606d099 | 2006-12-08 02:38:45 -0800 | [diff] [blame] | 895 | sunsu_set_termios(struct uart_port *port, struct ktermios *termios, |
| 896 | struct ktermios *old) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 897 | { |
| 898 | unsigned int baud, quot; |
| 899 | |
| 900 | /* |
| 901 | * Ask the core to calculate the divisor for us. |
| 902 | */ |
| 903 | baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16); |
| 904 | quot = uart_get_divisor(port, baud); |
| 905 | |
| 906 | sunsu_change_speed(port, termios->c_cflag, termios->c_iflag, quot); |
| 907 | } |
| 908 | |
| 909 | static void sunsu_release_port(struct uart_port *port) |
| 910 | { |
| 911 | } |
| 912 | |
| 913 | static int sunsu_request_port(struct uart_port *port) |
| 914 | { |
| 915 | return 0; |
| 916 | } |
| 917 | |
| 918 | static void sunsu_config_port(struct uart_port *port, int flags) |
| 919 | { |
| 920 | struct uart_sunsu_port *up = (struct uart_sunsu_port *) port; |
| 921 | |
| 922 | if (flags & UART_CONFIG_TYPE) { |
| 923 | /* |
| 924 | * We are supposed to call autoconfig here, but this requires |
| 925 | * splitting all the OBP probing crap from the UART probing. |
| 926 | * We'll do it when we kill sunsu.c altogether. |
| 927 | */ |
| 928 | port->type = up->type_probed; /* XXX */ |
| 929 | } |
| 930 | } |
| 931 | |
| 932 | static int |
| 933 | sunsu_verify_port(struct uart_port *port, struct serial_struct *ser) |
| 934 | { |
| 935 | return -EINVAL; |
| 936 | } |
| 937 | |
| 938 | static const char * |
| 939 | sunsu_type(struct uart_port *port) |
| 940 | { |
| 941 | int type = port->type; |
| 942 | |
| 943 | if (type >= ARRAY_SIZE(uart_config)) |
| 944 | type = 0; |
| 945 | return uart_config[type].name; |
| 946 | } |
| 947 | |
| 948 | static struct uart_ops sunsu_pops = { |
| 949 | .tx_empty = sunsu_tx_empty, |
| 950 | .set_mctrl = sunsu_set_mctrl, |
| 951 | .get_mctrl = sunsu_get_mctrl, |
| 952 | .stop_tx = sunsu_stop_tx, |
| 953 | .start_tx = sunsu_start_tx, |
| 954 | .stop_rx = sunsu_stop_rx, |
| 955 | .enable_ms = sunsu_enable_ms, |
| 956 | .break_ctl = sunsu_break_ctl, |
| 957 | .startup = sunsu_startup, |
| 958 | .shutdown = sunsu_shutdown, |
| 959 | .set_termios = sunsu_set_termios, |
| 960 | .type = sunsu_type, |
| 961 | .release_port = sunsu_release_port, |
| 962 | .request_port = sunsu_request_port, |
| 963 | .config_port = sunsu_config_port, |
| 964 | .verify_port = sunsu_verify_port, |
| 965 | }; |
| 966 | |
| 967 | #define UART_NR 4 |
| 968 | |
| 969 | static struct uart_sunsu_port sunsu_ports[UART_NR]; |
| 970 | |
| 971 | #ifdef CONFIG_SERIO |
| 972 | |
| 973 | static DEFINE_SPINLOCK(sunsu_serio_lock); |
| 974 | |
| 975 | static int sunsu_serio_write(struct serio *serio, unsigned char ch) |
| 976 | { |
| 977 | struct uart_sunsu_port *up = serio->port_data; |
| 978 | unsigned long flags; |
| 979 | int lsr; |
| 980 | |
| 981 | spin_lock_irqsave(&sunsu_serio_lock, flags); |
| 982 | |
| 983 | do { |
| 984 | lsr = serial_in(up, UART_LSR); |
| 985 | } while (!(lsr & UART_LSR_THRE)); |
| 986 | |
| 987 | /* Send the character out. */ |
| 988 | serial_out(up, UART_TX, ch); |
| 989 | |
| 990 | spin_unlock_irqrestore(&sunsu_serio_lock, flags); |
| 991 | |
| 992 | return 0; |
| 993 | } |
| 994 | |
| 995 | static int sunsu_serio_open(struct serio *serio) |
| 996 | { |
| 997 | struct uart_sunsu_port *up = serio->port_data; |
| 998 | unsigned long flags; |
| 999 | int ret; |
| 1000 | |
| 1001 | spin_lock_irqsave(&sunsu_serio_lock, flags); |
| 1002 | if (!up->serio_open) { |
| 1003 | up->serio_open = 1; |
| 1004 | ret = 0; |
| 1005 | } else |
| 1006 | ret = -EBUSY; |
| 1007 | spin_unlock_irqrestore(&sunsu_serio_lock, flags); |
| 1008 | |
| 1009 | return ret; |
| 1010 | } |
| 1011 | |
| 1012 | static void sunsu_serio_close(struct serio *serio) |
| 1013 | { |
| 1014 | struct uart_sunsu_port *up = serio->port_data; |
| 1015 | unsigned long flags; |
| 1016 | |
| 1017 | spin_lock_irqsave(&sunsu_serio_lock, flags); |
| 1018 | up->serio_open = 0; |
| 1019 | spin_unlock_irqrestore(&sunsu_serio_lock, flags); |
| 1020 | } |
| 1021 | |
| 1022 | #endif /* CONFIG_SERIO */ |
| 1023 | |
| 1024 | static void sunsu_autoconfig(struct uart_sunsu_port *up) |
| 1025 | { |
| 1026 | unsigned char status1, status2, scratch, scratch2, scratch3; |
| 1027 | unsigned char save_lcr, save_mcr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1028 | unsigned long flags; |
| 1029 | |
David S. Miller | 1708d24 | 2006-06-29 15:14:03 -0700 | [diff] [blame] | 1030 | if (up->su_type == SU_PORT_NONE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1031 | return; |
| 1032 | |
| 1033 | up->type_probed = PORT_UNKNOWN; |
Russell King | 9b4a161 | 2006-02-05 10:48:10 +0000 | [diff] [blame] | 1034 | up->port.iotype = UPIO_MEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1035 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1036 | spin_lock_irqsave(&up->port.lock, flags); |
| 1037 | |
Russell King | ce8337c | 2006-01-21 19:28:15 +0000 | [diff] [blame] | 1038 | if (!(up->port.flags & UPF_BUGGY_UART)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1039 | /* |
| 1040 | * Do a simple existence test first; if we fail this, there's |
| 1041 | * no point trying anything else. |
| 1042 | * |
| 1043 | * 0x80 is used as a nonsense port to prevent against false |
| 1044 | * positives due to ISA bus float. The assumption is that |
| 1045 | * 0x80 is a non-existent port; which should be safe since |
| 1046 | * include/asm/io.h also makes this assumption. |
| 1047 | */ |
| 1048 | scratch = serial_inp(up, UART_IER); |
| 1049 | serial_outp(up, UART_IER, 0); |
| 1050 | #ifdef __i386__ |
| 1051 | outb(0xff, 0x080); |
| 1052 | #endif |
| 1053 | scratch2 = serial_inp(up, UART_IER); |
| 1054 | serial_outp(up, UART_IER, 0x0f); |
| 1055 | #ifdef __i386__ |
| 1056 | outb(0, 0x080); |
| 1057 | #endif |
| 1058 | scratch3 = serial_inp(up, UART_IER); |
| 1059 | serial_outp(up, UART_IER, scratch); |
| 1060 | if (scratch2 != 0 || scratch3 != 0x0F) |
| 1061 | goto out; /* We failed; there's nothing here */ |
| 1062 | } |
| 1063 | |
| 1064 | save_mcr = serial_in(up, UART_MCR); |
| 1065 | save_lcr = serial_in(up, UART_LCR); |
| 1066 | |
| 1067 | /* |
| 1068 | * Check to see if a UART is really there. Certain broken |
| 1069 | * internal modems based on the Rockwell chipset fail this |
| 1070 | * test, because they apparently don't implement the loopback |
| 1071 | * test mode. So this test is skipped on the COM 1 through |
| 1072 | * COM 4 ports. This *should* be safe, since no board |
| 1073 | * manufacturer would be stupid enough to design a board |
| 1074 | * that conflicts with COM 1-4 --- we hope! |
| 1075 | */ |
Russell King | ce8337c | 2006-01-21 19:28:15 +0000 | [diff] [blame] | 1076 | if (!(up->port.flags & UPF_SKIP_TEST)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1077 | serial_outp(up, UART_MCR, UART_MCR_LOOP | 0x0A); |
| 1078 | status1 = serial_inp(up, UART_MSR) & 0xF0; |
| 1079 | serial_outp(up, UART_MCR, save_mcr); |
| 1080 | if (status1 != 0x90) |
| 1081 | goto out; /* We failed loopback test */ |
| 1082 | } |
| 1083 | serial_outp(up, UART_LCR, 0xBF); /* set up for StarTech test */ |
| 1084 | serial_outp(up, UART_EFR, 0); /* EFR is the same as FCR */ |
| 1085 | serial_outp(up, UART_LCR, 0); |
| 1086 | serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO); |
| 1087 | scratch = serial_in(up, UART_IIR) >> 6; |
| 1088 | switch (scratch) { |
| 1089 | case 0: |
| 1090 | up->port.type = PORT_16450; |
| 1091 | break; |
| 1092 | case 1: |
| 1093 | up->port.type = PORT_UNKNOWN; |
| 1094 | break; |
| 1095 | case 2: |
| 1096 | up->port.type = PORT_16550; |
| 1097 | break; |
| 1098 | case 3: |
| 1099 | up->port.type = PORT_16550A; |
| 1100 | break; |
| 1101 | } |
| 1102 | if (up->port.type == PORT_16550A) { |
| 1103 | /* Check for Startech UART's */ |
| 1104 | serial_outp(up, UART_LCR, UART_LCR_DLAB); |
| 1105 | if (serial_in(up, UART_EFR) == 0) { |
| 1106 | up->port.type = PORT_16650; |
| 1107 | } else { |
| 1108 | serial_outp(up, UART_LCR, 0xBF); |
| 1109 | if (serial_in(up, UART_EFR) == 0) |
| 1110 | up->port.type = PORT_16650V2; |
| 1111 | } |
| 1112 | } |
| 1113 | if (up->port.type == PORT_16550A) { |
| 1114 | /* Check for TI 16750 */ |
| 1115 | serial_outp(up, UART_LCR, save_lcr | UART_LCR_DLAB); |
| 1116 | serial_outp(up, UART_FCR, |
| 1117 | UART_FCR_ENABLE_FIFO | UART_FCR7_64BYTE); |
| 1118 | scratch = serial_in(up, UART_IIR) >> 5; |
| 1119 | if (scratch == 7) { |
| 1120 | /* |
| 1121 | * If this is a 16750, and not a cheap UART |
| 1122 | * clone, then it should only go into 64 byte |
| 1123 | * mode if the UART_FCR7_64BYTE bit was set |
| 1124 | * while UART_LCR_DLAB was latched. |
| 1125 | */ |
| 1126 | serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO); |
| 1127 | serial_outp(up, UART_LCR, 0); |
| 1128 | serial_outp(up, UART_FCR, |
| 1129 | UART_FCR_ENABLE_FIFO | UART_FCR7_64BYTE); |
| 1130 | scratch = serial_in(up, UART_IIR) >> 5; |
| 1131 | if (scratch == 6) |
| 1132 | up->port.type = PORT_16750; |
| 1133 | } |
| 1134 | serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO); |
| 1135 | } |
| 1136 | serial_outp(up, UART_LCR, save_lcr); |
| 1137 | if (up->port.type == PORT_16450) { |
| 1138 | scratch = serial_in(up, UART_SCR); |
| 1139 | serial_outp(up, UART_SCR, 0xa5); |
| 1140 | status1 = serial_in(up, UART_SCR); |
| 1141 | serial_outp(up, UART_SCR, 0x5a); |
| 1142 | status2 = serial_in(up, UART_SCR); |
| 1143 | serial_outp(up, UART_SCR, scratch); |
| 1144 | |
| 1145 | if ((status1 != 0xa5) || (status2 != 0x5a)) |
| 1146 | up->port.type = PORT_8250; |
| 1147 | } |
| 1148 | |
| 1149 | up->port.fifosize = uart_config[up->port.type].dfl_xmit_fifo_size; |
| 1150 | |
| 1151 | if (up->port.type == PORT_UNKNOWN) |
| 1152 | goto out; |
| 1153 | up->type_probed = up->port.type; /* XXX */ |
| 1154 | |
| 1155 | /* |
| 1156 | * Reset the UART. |
| 1157 | */ |
| 1158 | #ifdef CONFIG_SERIAL_8250_RSA |
| 1159 | if (up->port.type == PORT_RSA) |
| 1160 | serial_outp(up, UART_RSA_FRR, 0); |
| 1161 | #endif |
| 1162 | serial_outp(up, UART_MCR, save_mcr); |
| 1163 | serial_outp(up, UART_FCR, (UART_FCR_ENABLE_FIFO | |
| 1164 | UART_FCR_CLEAR_RCVR | |
| 1165 | UART_FCR_CLEAR_XMIT)); |
| 1166 | serial_outp(up, UART_FCR, 0); |
| 1167 | (void)serial_in(up, UART_RX); |
| 1168 | serial_outp(up, UART_IER, 0); |
| 1169 | |
| 1170 | out: |
| 1171 | spin_unlock_irqrestore(&up->port.lock, flags); |
| 1172 | } |
| 1173 | |
| 1174 | static struct uart_driver sunsu_reg = { |
| 1175 | .owner = THIS_MODULE, |
David S. Miller | 32039f4 | 2008-05-01 01:14:27 -0700 | [diff] [blame] | 1176 | .driver_name = "sunsu", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1177 | .dev_name = "ttyS", |
| 1178 | .major = TTY_MAJOR, |
| 1179 | }; |
| 1180 | |
David S. Miller | f5d378a | 2009-04-07 01:08:09 -0700 | [diff] [blame] | 1181 | static int __devinit sunsu_kbd_ms_init(struct uart_sunsu_port *up) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1182 | { |
David S. Miller | 623f41e | 2005-04-21 22:06:13 -0700 | [diff] [blame] | 1183 | int quot, baud; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1184 | #ifdef CONFIG_SERIO |
| 1185 | struct serio *serio; |
| 1186 | #endif |
| 1187 | |
David S. Miller | 623f41e | 2005-04-21 22:06:13 -0700 | [diff] [blame] | 1188 | if (up->su_type == SU_PORT_KBD) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1189 | up->cflag = B1200 | CS8 | CLOCAL | CREAD; |
David S. Miller | 623f41e | 2005-04-21 22:06:13 -0700 | [diff] [blame] | 1190 | baud = 1200; |
| 1191 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1192 | up->cflag = B4800 | CS8 | CLOCAL | CREAD; |
David S. Miller | 623f41e | 2005-04-21 22:06:13 -0700 | [diff] [blame] | 1193 | baud = 4800; |
| 1194 | } |
| 1195 | quot = up->port.uartclk / (16 * baud); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1196 | |
| 1197 | sunsu_autoconfig(up); |
| 1198 | if (up->port.type == PORT_UNKNOWN) |
David S. Miller | 1708d24 | 2006-06-29 15:14:03 -0700 | [diff] [blame] | 1199 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1200 | |
David S. Miller | 4f1296a | 2007-08-25 15:17:31 -0700 | [diff] [blame] | 1201 | printk("%s: %s port at %llx, irq %u\n", |
David S. Miller | c964521 | 2006-07-13 16:05:57 -0700 | [diff] [blame] | 1202 | to_of_device(up->port.dev)->node->full_name, |
| 1203 | (up->su_type == SU_PORT_KBD) ? "Keyboard" : "Mouse", |
David S. Miller | 4f1296a | 2007-08-25 15:17:31 -0700 | [diff] [blame] | 1204 | (unsigned long long) up->port.mapbase, |
| 1205 | up->port.irq); |
David S. Miller | c964521 | 2006-07-13 16:05:57 -0700 | [diff] [blame] | 1206 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1207 | #ifdef CONFIG_SERIO |
David S. Miller | 1708d24 | 2006-06-29 15:14:03 -0700 | [diff] [blame] | 1208 | serio = &up->serio; |
| 1209 | serio->port_data = up; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1210 | |
David S. Miller | 1708d24 | 2006-06-29 15:14:03 -0700 | [diff] [blame] | 1211 | serio->id.type = SERIO_RS232; |
| 1212 | if (up->su_type == SU_PORT_KBD) { |
| 1213 | serio->id.proto = SERIO_SUNKBD; |
| 1214 | strlcpy(serio->name, "sukbd", sizeof(serio->name)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1215 | } else { |
David S. Miller | 1708d24 | 2006-06-29 15:14:03 -0700 | [diff] [blame] | 1216 | serio->id.proto = SERIO_SUN; |
| 1217 | serio->id.extra = 1; |
| 1218 | strlcpy(serio->name, "sums", sizeof(serio->name)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1219 | } |
David S. Miller | 1708d24 | 2006-06-29 15:14:03 -0700 | [diff] [blame] | 1220 | strlcpy(serio->phys, |
| 1221 | (!(up->port.line & 1) ? "su/serio0" : "su/serio1"), |
| 1222 | sizeof(serio->phys)); |
| 1223 | |
| 1224 | serio->write = sunsu_serio_write; |
| 1225 | serio->open = sunsu_serio_open; |
| 1226 | serio->close = sunsu_serio_close; |
| 1227 | serio->dev.parent = up->port.dev; |
| 1228 | |
| 1229 | serio_register_port(serio); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1230 | #endif |
| 1231 | |
David S. Miller | 623f41e | 2005-04-21 22:06:13 -0700 | [diff] [blame] | 1232 | sunsu_change_speed(&up->port, up->cflag, 0, quot); |
| 1233 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1234 | sunsu_startup(&up->port); |
| 1235 | return 0; |
| 1236 | } |
| 1237 | |
| 1238 | /* |
| 1239 | * ------------------------------------------------------------ |
| 1240 | * Serial console driver |
| 1241 | * ------------------------------------------------------------ |
| 1242 | */ |
| 1243 | |
| 1244 | #ifdef CONFIG_SERIAL_SUNSU_CONSOLE |
| 1245 | |
| 1246 | #define BOTH_EMPTY (UART_LSR_TEMT | UART_LSR_THRE) |
| 1247 | |
| 1248 | /* |
| 1249 | * Wait for transmitter & holding register to empty |
| 1250 | */ |
| 1251 | static __inline__ void wait_for_xmitr(struct uart_sunsu_port *up) |
| 1252 | { |
| 1253 | unsigned int status, tmout = 10000; |
| 1254 | |
| 1255 | /* Wait up to 10ms for the character(s) to be sent. */ |
| 1256 | do { |
| 1257 | status = serial_in(up, UART_LSR); |
| 1258 | |
| 1259 | if (status & UART_LSR_BI) |
| 1260 | up->lsr_break_flag = UART_LSR_BI; |
| 1261 | |
| 1262 | if (--tmout == 0) |
| 1263 | break; |
| 1264 | udelay(1); |
| 1265 | } while ((status & BOTH_EMPTY) != BOTH_EMPTY); |
| 1266 | |
| 1267 | /* Wait up to 1s for flow control if necessary */ |
Russell King | ce8337c | 2006-01-21 19:28:15 +0000 | [diff] [blame] | 1268 | if (up->port.flags & UPF_CONS_FLOW) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1269 | tmout = 1000000; |
| 1270 | while (--tmout && |
| 1271 | ((serial_in(up, UART_MSR) & UART_MSR_CTS) == 0)) |
| 1272 | udelay(1); |
| 1273 | } |
| 1274 | } |
| 1275 | |
Russell King | d358788 | 2006-03-20 20:00:09 +0000 | [diff] [blame] | 1276 | static void sunsu_console_putchar(struct uart_port *port, int ch) |
| 1277 | { |
| 1278 | struct uart_sunsu_port *up = (struct uart_sunsu_port *)port; |
| 1279 | |
| 1280 | wait_for_xmitr(up); |
| 1281 | serial_out(up, UART_TX, ch); |
| 1282 | } |
| 1283 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1284 | /* |
| 1285 | * Print a string to the serial port trying not to disturb |
| 1286 | * any possible real use of the port... |
| 1287 | */ |
| 1288 | static void sunsu_console_write(struct console *co, const char *s, |
| 1289 | unsigned int count) |
| 1290 | { |
| 1291 | struct uart_sunsu_port *up = &sunsu_ports[co->index]; |
David S. Miller | f3c681c | 2007-07-15 23:53:32 -0700 | [diff] [blame] | 1292 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1293 | unsigned int ier; |
David S. Miller | f3c681c | 2007-07-15 23:53:32 -0700 | [diff] [blame] | 1294 | int locked = 1; |
| 1295 | |
| 1296 | local_irq_save(flags); |
| 1297 | if (up->port.sysrq) { |
| 1298 | locked = 0; |
| 1299 | } else if (oops_in_progress) { |
| 1300 | locked = spin_trylock(&up->port.lock); |
| 1301 | } else |
| 1302 | spin_lock(&up->port.lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1303 | |
| 1304 | /* |
| 1305 | * First save the UER then disable the interrupts |
| 1306 | */ |
| 1307 | ier = serial_in(up, UART_IER); |
| 1308 | serial_out(up, UART_IER, 0); |
| 1309 | |
Russell King | d358788 | 2006-03-20 20:00:09 +0000 | [diff] [blame] | 1310 | uart_console_write(&up->port, s, count, sunsu_console_putchar); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1311 | |
| 1312 | /* |
| 1313 | * Finally, wait for transmitter to become empty |
| 1314 | * and restore the IER |
| 1315 | */ |
| 1316 | wait_for_xmitr(up); |
| 1317 | serial_out(up, UART_IER, ier); |
David S. Miller | f3c681c | 2007-07-15 23:53:32 -0700 | [diff] [blame] | 1318 | |
| 1319 | if (locked) |
| 1320 | spin_unlock(&up->port.lock); |
| 1321 | local_irq_restore(flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1322 | } |
| 1323 | |
| 1324 | /* |
| 1325 | * Setup initial baud/bits/parity. We do two things here: |
| 1326 | * - construct a cflag setting for the first su_open() |
| 1327 | * - initialize the serial port |
| 1328 | * Return non-zero if we didn't find a serial port. |
| 1329 | */ |
David S. Miller | 90a660a | 2007-05-07 00:14:13 -0700 | [diff] [blame] | 1330 | static int __init sunsu_console_setup(struct console *co, char *options) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1331 | { |
| 1332 | struct uart_port *port; |
| 1333 | int baud = 9600; |
| 1334 | int bits = 8; |
| 1335 | int parity = 'n'; |
| 1336 | int flow = 'n'; |
| 1337 | |
| 1338 | printk("Console: ttyS%d (SU)\n", |
| 1339 | (sunsu_reg.minor - 64) + co->index); |
| 1340 | |
| 1341 | /* |
| 1342 | * Check whether an invalid uart number has been specified, and |
| 1343 | * if so, search for the first available port that does have |
| 1344 | * console support. |
| 1345 | */ |
| 1346 | if (co->index >= UART_NR) |
| 1347 | co->index = 0; |
| 1348 | port = &sunsu_ports[co->index].port; |
| 1349 | |
| 1350 | /* |
| 1351 | * Temporary fix. |
| 1352 | */ |
| 1353 | spin_lock_init(&port->lock); |
| 1354 | |
| 1355 | if (options) |
| 1356 | uart_parse_options(options, &baud, &parity, &bits, &flow); |
| 1357 | |
| 1358 | return uart_set_options(port, co, baud, parity, bits, flow); |
| 1359 | } |
| 1360 | |
David S. Miller | 90a660a | 2007-05-07 00:14:13 -0700 | [diff] [blame] | 1361 | static struct console sunsu_console = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1362 | .name = "ttyS", |
| 1363 | .write = sunsu_console_write, |
| 1364 | .device = uart_console_device, |
| 1365 | .setup = sunsu_console_setup, |
| 1366 | .flags = CON_PRINTBUFFER, |
| 1367 | .index = -1, |
| 1368 | .data = &sunsu_reg, |
| 1369 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1370 | |
| 1371 | /* |
| 1372 | * Register console. |
| 1373 | */ |
| 1374 | |
David S. Miller | c73fcc8 | 2007-07-20 16:59:26 -0700 | [diff] [blame] | 1375 | static inline struct console *SUNSU_CONSOLE(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1376 | { |
David S. Miller | 90a660a | 2007-05-07 00:14:13 -0700 | [diff] [blame] | 1377 | return &sunsu_console; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1378 | } |
| 1379 | #else |
David S. Miller | c73fcc8 | 2007-07-20 16:59:26 -0700 | [diff] [blame] | 1380 | #define SUNSU_CONSOLE() (NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1381 | #define sunsu_serial_console_init() do { } while (0) |
| 1382 | #endif |
| 1383 | |
David S. Miller | 1708d24 | 2006-06-29 15:14:03 -0700 | [diff] [blame] | 1384 | static enum su_type __devinit su_get_type(struct device_node *dp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1385 | { |
David S. Miller | 1708d24 | 2006-06-29 15:14:03 -0700 | [diff] [blame] | 1386 | struct device_node *ap = of_find_node_by_path("/aliases"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1387 | |
David S. Miller | 1708d24 | 2006-06-29 15:14:03 -0700 | [diff] [blame] | 1388 | if (ap) { |
Stephen Rothwell | ccf0dec | 2007-03-29 00:49:54 -0700 | [diff] [blame] | 1389 | const char *keyb = of_get_property(ap, "keyboard", NULL); |
| 1390 | const char *ms = of_get_property(ap, "mouse", NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1391 | |
David S. Miller | 1708d24 | 2006-06-29 15:14:03 -0700 | [diff] [blame] | 1392 | if (keyb) { |
| 1393 | if (dp == of_find_node_by_path(keyb)) |
| 1394 | return SU_PORT_KBD; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1395 | } |
David S. Miller | 1708d24 | 2006-06-29 15:14:03 -0700 | [diff] [blame] | 1396 | if (ms) { |
| 1397 | if (dp == of_find_node_by_path(ms)) |
| 1398 | return SU_PORT_MS; |
| 1399 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1400 | } |
| 1401 | |
David S. Miller | 1708d24 | 2006-06-29 15:14:03 -0700 | [diff] [blame] | 1402 | return SU_PORT_PORT; |
| 1403 | } |
| 1404 | |
| 1405 | static int __devinit su_probe(struct of_device *op, const struct of_device_id *match) |
| 1406 | { |
| 1407 | static int inst; |
| 1408 | struct device_node *dp = op->node; |
| 1409 | struct uart_sunsu_port *up; |
| 1410 | struct resource *rp; |
David S. Miller | 91d1ed1 | 2006-07-12 21:04:21 -0700 | [diff] [blame] | 1411 | enum su_type type; |
David S. Miller | 1708d24 | 2006-06-29 15:14:03 -0700 | [diff] [blame] | 1412 | int err; |
| 1413 | |
David S. Miller | 91d1ed1 | 2006-07-12 21:04:21 -0700 | [diff] [blame] | 1414 | type = su_get_type(dp); |
| 1415 | if (type == SU_PORT_PORT) { |
| 1416 | if (inst >= UART_NR) |
| 1417 | return -EINVAL; |
| 1418 | up = &sunsu_ports[inst]; |
| 1419 | } else { |
| 1420 | up = kzalloc(sizeof(*up), GFP_KERNEL); |
| 1421 | if (!up) |
| 1422 | return -ENOMEM; |
| 1423 | } |
David S. Miller | 1708d24 | 2006-06-29 15:14:03 -0700 | [diff] [blame] | 1424 | |
David S. Miller | 1708d24 | 2006-06-29 15:14:03 -0700 | [diff] [blame] | 1425 | up->port.line = inst; |
| 1426 | |
| 1427 | spin_lock_init(&up->port.lock); |
| 1428 | |
David S. Miller | 91d1ed1 | 2006-07-12 21:04:21 -0700 | [diff] [blame] | 1429 | up->su_type = type; |
David S. Miller | 1708d24 | 2006-06-29 15:14:03 -0700 | [diff] [blame] | 1430 | |
| 1431 | rp = &op->resource[0]; |
David S. Miller | 91d1ed1 | 2006-07-12 21:04:21 -0700 | [diff] [blame] | 1432 | up->port.mapbase = rp->start; |
David S. Miller | 1708d24 | 2006-06-29 15:14:03 -0700 | [diff] [blame] | 1433 | up->reg_size = (rp->end - rp->start) + 1; |
| 1434 | up->port.membase = of_ioremap(rp, 0, up->reg_size, "su"); |
David S. Miller | 91d1ed1 | 2006-07-12 21:04:21 -0700 | [diff] [blame] | 1435 | if (!up->port.membase) { |
| 1436 | if (type != SU_PORT_PORT) |
| 1437 | kfree(up); |
David S. Miller | 1708d24 | 2006-06-29 15:14:03 -0700 | [diff] [blame] | 1438 | return -ENOMEM; |
David S. Miller | 91d1ed1 | 2006-07-12 21:04:21 -0700 | [diff] [blame] | 1439 | } |
David S. Miller | 1708d24 | 2006-06-29 15:14:03 -0700 | [diff] [blame] | 1440 | |
| 1441 | up->port.irq = op->irqs[0]; |
| 1442 | |
| 1443 | up->port.dev = &op->dev; |
| 1444 | |
| 1445 | up->port.type = PORT_UNKNOWN; |
| 1446 | up->port.uartclk = (SU_BASE_BAUD * 16); |
| 1447 | |
| 1448 | err = 0; |
| 1449 | if (up->su_type == SU_PORT_KBD || up->su_type == SU_PORT_MS) { |
| 1450 | err = sunsu_kbd_ms_init(up); |
David S. Miller | 91d1ed1 | 2006-07-12 21:04:21 -0700 | [diff] [blame] | 1451 | if (err) { |
| 1452 | kfree(up); |
David S. Miller | 1708d24 | 2006-06-29 15:14:03 -0700 | [diff] [blame] | 1453 | goto out_unmap; |
David S. Miller | 91d1ed1 | 2006-07-12 21:04:21 -0700 | [diff] [blame] | 1454 | } |
| 1455 | dev_set_drvdata(&op->dev, up); |
David S. Miller | a1d22d3 | 2006-06-29 19:40:19 -0700 | [diff] [blame] | 1456 | |
| 1457 | return 0; |
David S. Miller | 1708d24 | 2006-06-29 15:14:03 -0700 | [diff] [blame] | 1458 | } |
| 1459 | |
| 1460 | up->port.flags |= UPF_BOOT_AUTOCONF; |
| 1461 | |
| 1462 | sunsu_autoconfig(up); |
| 1463 | |
| 1464 | err = -ENODEV; |
| 1465 | if (up->port.type == PORT_UNKNOWN) |
| 1466 | goto out_unmap; |
| 1467 | |
| 1468 | up->port.ops = &sunsu_pops; |
| 1469 | |
David S. Miller | c73fcc8 | 2007-07-20 16:59:26 -0700 | [diff] [blame] | 1470 | sunserial_console_match(SUNSU_CONSOLE(), dp, |
| 1471 | &sunsu_reg, up->port.line); |
David S. Miller | 1708d24 | 2006-06-29 15:14:03 -0700 | [diff] [blame] | 1472 | err = uart_add_one_port(&sunsu_reg, &up->port); |
| 1473 | if (err) |
| 1474 | goto out_unmap; |
| 1475 | |
| 1476 | dev_set_drvdata(&op->dev, up); |
| 1477 | |
| 1478 | inst++; |
| 1479 | |
| 1480 | return 0; |
| 1481 | |
| 1482 | out_unmap: |
David S. Miller | e3a411a3 | 2006-12-28 21:01:32 -0800 | [diff] [blame] | 1483 | of_iounmap(&op->resource[0], up->port.membase, up->reg_size); |
David S. Miller | 1708d24 | 2006-06-29 15:14:03 -0700 | [diff] [blame] | 1484 | return err; |
| 1485 | } |
| 1486 | |
David S. Miller | e3a411a3 | 2006-12-28 21:01:32 -0800 | [diff] [blame] | 1487 | static int __devexit su_remove(struct of_device *op) |
David S. Miller | 1708d24 | 2006-06-29 15:14:03 -0700 | [diff] [blame] | 1488 | { |
David S. Miller | e3a411a3 | 2006-12-28 21:01:32 -0800 | [diff] [blame] | 1489 | struct uart_sunsu_port *up = dev_get_drvdata(&op->dev); |
David S. Miller | 1708d24 | 2006-06-29 15:14:03 -0700 | [diff] [blame] | 1490 | |
| 1491 | if (up->su_type == SU_PORT_MS || |
| 1492 | up->su_type == SU_PORT_KBD) { |
| 1493 | #ifdef CONFIG_SERIO |
| 1494 | serio_unregister_port(&up->serio); |
| 1495 | #endif |
David S. Miller | 91d1ed1 | 2006-07-12 21:04:21 -0700 | [diff] [blame] | 1496 | kfree(up); |
| 1497 | } else if (up->port.type != PORT_UNKNOWN) { |
David S. Miller | 1708d24 | 2006-06-29 15:14:03 -0700 | [diff] [blame] | 1498 | uart_remove_one_port(&sunsu_reg, &up->port); |
David S. Miller | 91d1ed1 | 2006-07-12 21:04:21 -0700 | [diff] [blame] | 1499 | } |
| 1500 | |
Amol Lad | 65da4d8 | 2006-09-30 23:29:25 -0700 | [diff] [blame] | 1501 | if (up->port.membase) |
David S. Miller | e3a411a3 | 2006-12-28 21:01:32 -0800 | [diff] [blame] | 1502 | of_iounmap(&op->resource[0], up->port.membase, up->reg_size); |
Amol Lad | 65da4d8 | 2006-09-30 23:29:25 -0700 | [diff] [blame] | 1503 | |
David S. Miller | e3a411a3 | 2006-12-28 21:01:32 -0800 | [diff] [blame] | 1504 | dev_set_drvdata(&op->dev, NULL); |
David S. Miller | 1708d24 | 2006-06-29 15:14:03 -0700 | [diff] [blame] | 1505 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1506 | return 0; |
| 1507 | } |
| 1508 | |
David S. Miller | fd09831 | 2008-08-31 01:23:17 -0700 | [diff] [blame] | 1509 | static const struct of_device_id su_match[] = { |
David S. Miller | 1708d24 | 2006-06-29 15:14:03 -0700 | [diff] [blame] | 1510 | { |
| 1511 | .name = "su", |
| 1512 | }, |
| 1513 | { |
| 1514 | .name = "su_pnp", |
| 1515 | }, |
| 1516 | { |
| 1517 | .name = "serial", |
| 1518 | .compatible = "su", |
| 1519 | }, |
| 1520 | {}, |
| 1521 | }; |
| 1522 | MODULE_DEVICE_TABLE(of, su_match); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1523 | |
David S. Miller | 1708d24 | 2006-06-29 15:14:03 -0700 | [diff] [blame] | 1524 | static struct of_platform_driver su_driver = { |
| 1525 | .name = "su", |
| 1526 | .match_table = su_match, |
| 1527 | .probe = su_probe, |
| 1528 | .remove = __devexit_p(su_remove), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1529 | }; |
| 1530 | |
David S. Miller | 1708d24 | 2006-06-29 15:14:03 -0700 | [diff] [blame] | 1531 | static int __init sunsu_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1532 | { |
David S. Miller | 1708d24 | 2006-06-29 15:14:03 -0700 | [diff] [blame] | 1533 | struct device_node *dp; |
| 1534 | int err; |
Martin Habets | 58d784a | 2007-12-11 03:37:04 -0800 | [diff] [blame] | 1535 | int num_uart = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1536 | |
David S. Miller | 1708d24 | 2006-06-29 15:14:03 -0700 | [diff] [blame] | 1537 | for_each_node_by_name(dp, "su") { |
| 1538 | if (su_get_type(dp) == SU_PORT_PORT) |
| 1539 | num_uart++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1540 | } |
David S. Miller | 1708d24 | 2006-06-29 15:14:03 -0700 | [diff] [blame] | 1541 | for_each_node_by_name(dp, "su_pnp") { |
| 1542 | if (su_get_type(dp) == SU_PORT_PORT) |
| 1543 | num_uart++; |
| 1544 | } |
| 1545 | for_each_node_by_name(dp, "serial") { |
| 1546 | if (of_device_is_compatible(dp, "su")) { |
| 1547 | if (su_get_type(dp) == SU_PORT_PORT) |
| 1548 | num_uart++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1549 | } |
| 1550 | } |
| 1551 | |
David S. Miller | 1708d24 | 2006-06-29 15:14:03 -0700 | [diff] [blame] | 1552 | if (num_uart) { |
Martin Habets | 58d784a | 2007-12-11 03:37:04 -0800 | [diff] [blame] | 1553 | err = sunserial_register_minors(&sunsu_reg, num_uart); |
David S. Miller | 1708d24 | 2006-06-29 15:14:03 -0700 | [diff] [blame] | 1554 | if (err) |
| 1555 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1556 | } |
| 1557 | |
David S. Miller | 1708d24 | 2006-06-29 15:14:03 -0700 | [diff] [blame] | 1558 | err = of_register_driver(&su_driver, &of_bus_type); |
| 1559 | if (err && num_uart) |
Martin Habets | 58d784a | 2007-12-11 03:37:04 -0800 | [diff] [blame] | 1560 | sunserial_unregister_minors(&sunsu_reg, num_uart); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1561 | |
David S. Miller | 1708d24 | 2006-06-29 15:14:03 -0700 | [diff] [blame] | 1562 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1563 | } |
| 1564 | |
| 1565 | static void __exit sunsu_exit(void) |
| 1566 | { |
Martin Habets | 58d784a | 2007-12-11 03:37:04 -0800 | [diff] [blame] | 1567 | if (sunsu_reg.nr) |
| 1568 | sunserial_unregister_minors(&sunsu_reg, sunsu_reg.nr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1569 | } |
| 1570 | |
David S. Miller | 1708d24 | 2006-06-29 15:14:03 -0700 | [diff] [blame] | 1571 | module_init(sunsu_init); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1572 | module_exit(sunsu_exit); |
David S. Miller | 9efc371 | 2006-06-29 15:14:17 -0700 | [diff] [blame] | 1573 | |
| 1574 | MODULE_AUTHOR("Eddie C. Dost, Peter Zaitcev, and David S. Miller"); |
| 1575 | MODULE_DESCRIPTION("Sun SU serial port driver"); |
| 1576 | MODULE_VERSION("2.0"); |
Andrew Morton | 9a2a9bb2 | 2006-05-15 14:10:11 -0700 | [diff] [blame] | 1577 | MODULE_LICENSE("GPL"); |