Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/drivers/char/clps711x.c |
| 3 | * |
| 4 | * Driver for CLPS711x serial ports |
| 5 | * |
| 6 | * Based on drivers/char/serial.c, by Linus Torvalds, Theodore Ts'o. |
| 7 | * |
| 8 | * Copyright 1999 ARM Limited |
| 9 | * Copyright (C) 2000 Deep Blue Solutions Ltd. |
| 10 | * |
| 11 | * This program is free software; you can redistribute it and/or modify |
| 12 | * it under the terms of the GNU General Public License as published by |
| 13 | * the Free Software Foundation; either version 2 of the License, or |
| 14 | * (at your option) any later version. |
| 15 | * |
| 16 | * This program is distributed in the hope that it will be useful, |
| 17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 19 | * GNU General Public License for more details. |
| 20 | * |
| 21 | * You should have received a copy of the GNU General Public License |
| 22 | * along with this program; if not, write to the Free Software |
| 23 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | |
| 26 | #if defined(CONFIG_SERIAL_CLPS711X_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) |
| 27 | #define SUPPORT_SYSRQ |
| 28 | #endif |
| 29 | |
| 30 | #include <linux/module.h> |
| 31 | #include <linux/ioport.h> |
| 32 | #include <linux/init.h> |
| 33 | #include <linux/console.h> |
| 34 | #include <linux/sysrq.h> |
| 35 | #include <linux/spinlock.h> |
| 36 | #include <linux/device.h> |
| 37 | #include <linux/tty.h> |
| 38 | #include <linux/tty_flip.h> |
| 39 | #include <linux/serial_core.h> |
| 40 | #include <linux/serial.h> |
| 41 | |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 42 | #include <mach/hardware.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | #include <asm/io.h> |
| 44 | #include <asm/irq.h> |
| 45 | #include <asm/hardware/clps7111.h> |
| 46 | |
| 47 | #define UART_NR 2 |
| 48 | |
| 49 | #define SERIAL_CLPS711X_MAJOR 204 |
| 50 | #define SERIAL_CLPS711X_MINOR 40 |
| 51 | #define SERIAL_CLPS711X_NR UART_NR |
| 52 | |
| 53 | /* |
| 54 | * We use the relevant SYSCON register as a base address for these ports. |
| 55 | */ |
| 56 | #define UBRLCR(port) ((port)->iobase + UBRLCR1 - SYSCON1) |
| 57 | #define UARTDR(port) ((port)->iobase + UARTDR1 - SYSCON1) |
| 58 | #define SYSFLG(port) ((port)->iobase + SYSFLG1 - SYSCON1) |
| 59 | #define SYSCON(port) ((port)->iobase + SYSCON1 - SYSCON1) |
| 60 | |
| 61 | #define TX_IRQ(port) ((port)->irq) |
| 62 | #define RX_IRQ(port) ((port)->irq + 1) |
| 63 | |
| 64 | #define UART_ANY_ERR (UARTDR_FRMERR | UARTDR_PARERR | UARTDR_OVERR) |
| 65 | |
| 66 | #define tx_enabled(port) ((port)->unused[0]) |
| 67 | |
Russell King | b129a8c | 2005-08-31 10:12:14 +0100 | [diff] [blame] | 68 | static void clps711xuart_stop_tx(struct uart_port *port) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | { |
| 70 | if (tx_enabled(port)) { |
| 71 | disable_irq(TX_IRQ(port)); |
| 72 | tx_enabled(port) = 0; |
| 73 | } |
| 74 | } |
| 75 | |
Russell King | b129a8c | 2005-08-31 10:12:14 +0100 | [diff] [blame] | 76 | static void clps711xuart_start_tx(struct uart_port *port) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | { |
| 78 | if (!tx_enabled(port)) { |
| 79 | enable_irq(TX_IRQ(port)); |
| 80 | tx_enabled(port) = 1; |
| 81 | } |
| 82 | } |
| 83 | |
| 84 | static void clps711xuart_stop_rx(struct uart_port *port) |
| 85 | { |
| 86 | disable_irq(RX_IRQ(port)); |
| 87 | } |
| 88 | |
| 89 | static void clps711xuart_enable_ms(struct uart_port *port) |
| 90 | { |
| 91 | } |
| 92 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 93 | static irqreturn_t clps711xuart_int_rx(int irq, void *dev_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | { |
| 95 | struct uart_port *port = dev_id; |
Takashi Iwai | a88487c | 2008-07-16 21:54:42 +0100 | [diff] [blame] | 96 | struct tty_struct *tty = port->info->port.tty; |
Russell King | f993724 | 2005-09-24 10:12:47 +0100 | [diff] [blame] | 97 | unsigned int status, ch, flg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | |
| 99 | status = clps_readl(SYSFLG(port)); |
| 100 | while (!(status & SYSFLG_URXFE)) { |
| 101 | ch = clps_readl(UARTDR(port)); |
| 102 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | port->icount.rx++; |
| 104 | |
| 105 | flg = TTY_NORMAL; |
| 106 | |
| 107 | /* |
| 108 | * Note that the error handling code is |
| 109 | * out of the main execution path |
| 110 | */ |
Russell King | 2a9604b | 2005-04-26 15:32:00 +0100 | [diff] [blame] | 111 | if (unlikely(ch & UART_ANY_ERR)) { |
| 112 | if (ch & UARTDR_PARERR) |
| 113 | port->icount.parity++; |
| 114 | else if (ch & UARTDR_FRMERR) |
| 115 | port->icount.frame++; |
| 116 | if (ch & UARTDR_OVERR) |
| 117 | port->icount.overrun++; |
| 118 | |
| 119 | ch &= port->read_status_mask; |
| 120 | |
| 121 | if (ch & UARTDR_PARERR) |
| 122 | flg = TTY_PARITY; |
| 123 | else if (ch & UARTDR_FRMERR) |
| 124 | flg = TTY_FRAME; |
| 125 | |
| 126 | #ifdef SUPPORT_SYSRQ |
| 127 | port->sysrq = 0; |
| 128 | #endif |
| 129 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 131 | if (uart_handle_sysrq_char(port, ch)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | goto ignore_char; |
| 133 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | /* |
| 135 | * CHECK: does overrun affect the current character? |
| 136 | * ASSUMPTION: it does not. |
| 137 | */ |
Russell King | 05ab301 | 2005-05-09 23:21:59 +0100 | [diff] [blame] | 138 | uart_insert_char(port, ch, UARTDR_OVERR, ch, flg); |
Russell King | 2a9604b | 2005-04-26 15:32:00 +0100 | [diff] [blame] | 139 | |
| 140 | ignore_char: |
| 141 | status = clps_readl(SYSFLG(port)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | } |
Russell King | 2a9604b | 2005-04-26 15:32:00 +0100 | [diff] [blame] | 143 | tty_flip_buffer_push(tty); |
| 144 | return IRQ_HANDLED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | } |
| 146 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 147 | static irqreturn_t clps711xuart_int_tx(int irq, void *dev_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | { |
| 149 | struct uart_port *port = dev_id; |
| 150 | struct circ_buf *xmit = &port->info->xmit; |
| 151 | int count; |
| 152 | |
| 153 | if (port->x_char) { |
| 154 | clps_writel(port->x_char, UARTDR(port)); |
| 155 | port->icount.tx++; |
| 156 | port->x_char = 0; |
| 157 | return IRQ_HANDLED; |
| 158 | } |
| 159 | if (uart_circ_empty(xmit) || uart_tx_stopped(port)) { |
Russell King | b129a8c | 2005-08-31 10:12:14 +0100 | [diff] [blame] | 160 | clps711xuart_stop_tx(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | return IRQ_HANDLED; |
| 162 | } |
| 163 | |
| 164 | count = port->fifosize >> 1; |
| 165 | do { |
| 166 | clps_writel(xmit->buf[xmit->tail], UARTDR(port)); |
| 167 | xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); |
| 168 | port->icount.tx++; |
| 169 | if (uart_circ_empty(xmit)) |
| 170 | break; |
| 171 | } while (--count > 0); |
| 172 | |
| 173 | if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) |
| 174 | uart_write_wakeup(port); |
| 175 | |
| 176 | if (uart_circ_empty(xmit)) |
Russell King | b129a8c | 2005-08-31 10:12:14 +0100 | [diff] [blame] | 177 | clps711xuart_stop_tx(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | |
| 179 | return IRQ_HANDLED; |
| 180 | } |
| 181 | |
| 182 | static unsigned int clps711xuart_tx_empty(struct uart_port *port) |
| 183 | { |
| 184 | unsigned int status = clps_readl(SYSFLG(port)); |
| 185 | return status & SYSFLG_UBUSY ? 0 : TIOCSER_TEMT; |
| 186 | } |
| 187 | |
| 188 | static unsigned int clps711xuart_get_mctrl(struct uart_port *port) |
| 189 | { |
| 190 | unsigned int port_addr; |
| 191 | unsigned int result = 0; |
| 192 | unsigned int status; |
| 193 | |
| 194 | port_addr = SYSFLG(port); |
| 195 | if (port_addr == SYSFLG1) { |
| 196 | status = clps_readl(SYSFLG1); |
| 197 | if (status & SYSFLG1_DCD) |
| 198 | result |= TIOCM_CAR; |
| 199 | if (status & SYSFLG1_DSR) |
| 200 | result |= TIOCM_DSR; |
| 201 | if (status & SYSFLG1_CTS) |
| 202 | result |= TIOCM_CTS; |
| 203 | } |
| 204 | |
| 205 | return result; |
| 206 | } |
| 207 | |
| 208 | static void |
| 209 | clps711xuart_set_mctrl_null(struct uart_port *port, unsigned int mctrl) |
| 210 | { |
| 211 | } |
| 212 | |
| 213 | static void clps711xuart_break_ctl(struct uart_port *port, int break_state) |
| 214 | { |
| 215 | unsigned long flags; |
| 216 | unsigned int ubrlcr; |
| 217 | |
| 218 | spin_lock_irqsave(&port->lock, flags); |
| 219 | ubrlcr = clps_readl(UBRLCR(port)); |
| 220 | if (break_state == -1) |
| 221 | ubrlcr |= UBRLCR_BREAK; |
| 222 | else |
| 223 | ubrlcr &= ~UBRLCR_BREAK; |
| 224 | clps_writel(ubrlcr, UBRLCR(port)); |
| 225 | spin_unlock_irqrestore(&port->lock, flags); |
| 226 | } |
| 227 | |
| 228 | static int clps711xuart_startup(struct uart_port *port) |
| 229 | { |
| 230 | unsigned int syscon; |
| 231 | int retval; |
| 232 | |
| 233 | tx_enabled(port) = 1; |
| 234 | |
| 235 | /* |
| 236 | * Allocate the IRQs |
| 237 | */ |
| 238 | retval = request_irq(TX_IRQ(port), clps711xuart_int_tx, 0, |
| 239 | "clps711xuart_tx", port); |
| 240 | if (retval) |
| 241 | return retval; |
| 242 | |
| 243 | retval = request_irq(RX_IRQ(port), clps711xuart_int_rx, 0, |
| 244 | "clps711xuart_rx", port); |
| 245 | if (retval) { |
| 246 | free_irq(TX_IRQ(port), port); |
| 247 | return retval; |
| 248 | } |
| 249 | |
| 250 | /* |
| 251 | * enable the port |
| 252 | */ |
| 253 | syscon = clps_readl(SYSCON(port)); |
| 254 | syscon |= SYSCON_UARTEN; |
| 255 | clps_writel(syscon, SYSCON(port)); |
| 256 | |
| 257 | return 0; |
| 258 | } |
| 259 | |
| 260 | static void clps711xuart_shutdown(struct uart_port *port) |
| 261 | { |
| 262 | unsigned int ubrlcr, syscon; |
| 263 | |
| 264 | /* |
| 265 | * Free the interrupt |
| 266 | */ |
| 267 | free_irq(TX_IRQ(port), port); /* TX interrupt */ |
| 268 | free_irq(RX_IRQ(port), port); /* RX interrupt */ |
| 269 | |
| 270 | /* |
| 271 | * disable the port |
| 272 | */ |
| 273 | syscon = clps_readl(SYSCON(port)); |
| 274 | syscon &= ~SYSCON_UARTEN; |
| 275 | clps_writel(syscon, SYSCON(port)); |
| 276 | |
| 277 | /* |
| 278 | * disable break condition and fifos |
| 279 | */ |
| 280 | ubrlcr = clps_readl(UBRLCR(port)); |
| 281 | ubrlcr &= ~(UBRLCR_FIFOEN | UBRLCR_BREAK); |
| 282 | clps_writel(ubrlcr, UBRLCR(port)); |
| 283 | } |
| 284 | |
| 285 | static void |
Alan Cox | 606d099 | 2006-12-08 02:38:45 -0800 | [diff] [blame] | 286 | clps711xuart_set_termios(struct uart_port *port, struct ktermios *termios, |
| 287 | struct ktermios *old) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | { |
| 289 | unsigned int ubrlcr, baud, quot; |
| 290 | unsigned long flags; |
| 291 | |
| 292 | /* |
| 293 | * We don't implement CREAD. |
| 294 | */ |
| 295 | termios->c_cflag |= CREAD; |
| 296 | |
| 297 | /* |
| 298 | * Ask the core to calculate the divisor for us. |
| 299 | */ |
| 300 | baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16); |
| 301 | quot = uart_get_divisor(port, baud); |
| 302 | |
| 303 | switch (termios->c_cflag & CSIZE) { |
| 304 | case CS5: |
| 305 | ubrlcr = UBRLCR_WRDLEN5; |
| 306 | break; |
| 307 | case CS6: |
| 308 | ubrlcr = UBRLCR_WRDLEN6; |
| 309 | break; |
| 310 | case CS7: |
| 311 | ubrlcr = UBRLCR_WRDLEN7; |
| 312 | break; |
| 313 | default: // CS8 |
| 314 | ubrlcr = UBRLCR_WRDLEN8; |
| 315 | break; |
| 316 | } |
| 317 | if (termios->c_cflag & CSTOPB) |
| 318 | ubrlcr |= UBRLCR_XSTOP; |
| 319 | if (termios->c_cflag & PARENB) { |
| 320 | ubrlcr |= UBRLCR_PRTEN; |
| 321 | if (!(termios->c_cflag & PARODD)) |
| 322 | ubrlcr |= UBRLCR_EVENPRT; |
| 323 | } |
| 324 | if (port->fifosize > 1) |
| 325 | ubrlcr |= UBRLCR_FIFOEN; |
| 326 | |
| 327 | spin_lock_irqsave(&port->lock, flags); |
| 328 | |
| 329 | /* |
| 330 | * Update the per-port timeout. |
| 331 | */ |
| 332 | uart_update_timeout(port, termios->c_cflag, baud); |
| 333 | |
| 334 | port->read_status_mask = UARTDR_OVERR; |
| 335 | if (termios->c_iflag & INPCK) |
| 336 | port->read_status_mask |= UARTDR_PARERR | UARTDR_FRMERR; |
| 337 | |
| 338 | /* |
| 339 | * Characters to ignore |
| 340 | */ |
| 341 | port->ignore_status_mask = 0; |
| 342 | if (termios->c_iflag & IGNPAR) |
| 343 | port->ignore_status_mask |= UARTDR_FRMERR | UARTDR_PARERR; |
| 344 | if (termios->c_iflag & IGNBRK) { |
| 345 | /* |
| 346 | * If we're ignoring parity and break indicators, |
| 347 | * ignore overruns to (for real raw support). |
| 348 | */ |
| 349 | if (termios->c_iflag & IGNPAR) |
| 350 | port->ignore_status_mask |= UARTDR_OVERR; |
| 351 | } |
| 352 | |
| 353 | quot -= 1; |
| 354 | |
| 355 | clps_writel(ubrlcr | quot, UBRLCR(port)); |
| 356 | |
| 357 | spin_unlock_irqrestore(&port->lock, flags); |
| 358 | } |
| 359 | |
| 360 | static const char *clps711xuart_type(struct uart_port *port) |
| 361 | { |
| 362 | return port->type == PORT_CLPS711X ? "CLPS711x" : NULL; |
| 363 | } |
| 364 | |
| 365 | /* |
| 366 | * Configure/autoconfigure the port. |
| 367 | */ |
| 368 | static void clps711xuart_config_port(struct uart_port *port, int flags) |
| 369 | { |
| 370 | if (flags & UART_CONFIG_TYPE) |
| 371 | port->type = PORT_CLPS711X; |
| 372 | } |
| 373 | |
| 374 | static void clps711xuart_release_port(struct uart_port *port) |
| 375 | { |
| 376 | } |
| 377 | |
| 378 | static int clps711xuart_request_port(struct uart_port *port) |
| 379 | { |
| 380 | return 0; |
| 381 | } |
| 382 | |
| 383 | static struct uart_ops clps711x_pops = { |
| 384 | .tx_empty = clps711xuart_tx_empty, |
| 385 | .set_mctrl = clps711xuart_set_mctrl_null, |
| 386 | .get_mctrl = clps711xuart_get_mctrl, |
| 387 | .stop_tx = clps711xuart_stop_tx, |
| 388 | .start_tx = clps711xuart_start_tx, |
| 389 | .stop_rx = clps711xuart_stop_rx, |
| 390 | .enable_ms = clps711xuart_enable_ms, |
| 391 | .break_ctl = clps711xuart_break_ctl, |
| 392 | .startup = clps711xuart_startup, |
| 393 | .shutdown = clps711xuart_shutdown, |
| 394 | .set_termios = clps711xuart_set_termios, |
| 395 | .type = clps711xuart_type, |
| 396 | .config_port = clps711xuart_config_port, |
| 397 | .release_port = clps711xuart_release_port, |
| 398 | .request_port = clps711xuart_request_port, |
| 399 | }; |
| 400 | |
| 401 | static struct uart_port clps711x_ports[UART_NR] = { |
| 402 | { |
| 403 | .iobase = SYSCON1, |
| 404 | .irq = IRQ_UTXINT1, /* IRQ_URXINT1, IRQ_UMSINT */ |
| 405 | .uartclk = 3686400, |
| 406 | .fifosize = 16, |
| 407 | .ops = &clps711x_pops, |
| 408 | .line = 0, |
Russell King | ce8337c | 2006-01-21 19:28:15 +0000 | [diff] [blame] | 409 | .flags = UPF_BOOT_AUTOCONF, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 410 | }, |
| 411 | { |
| 412 | .iobase = SYSCON2, |
| 413 | .irq = IRQ_UTXINT2, /* IRQ_URXINT2 */ |
| 414 | .uartclk = 3686400, |
| 415 | .fifosize = 16, |
| 416 | .ops = &clps711x_pops, |
| 417 | .line = 1, |
Russell King | ce8337c | 2006-01-21 19:28:15 +0000 | [diff] [blame] | 418 | .flags = UPF_BOOT_AUTOCONF, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 419 | } |
| 420 | }; |
| 421 | |
| 422 | #ifdef CONFIG_SERIAL_CLPS711X_CONSOLE |
Russell King | d358788 | 2006-03-20 20:00:09 +0000 | [diff] [blame] | 423 | static void clps711xuart_console_putchar(struct uart_port *port, int ch) |
| 424 | { |
| 425 | while (clps_readl(SYSFLG(port)) & SYSFLG_UTXFF) |
| 426 | barrier(); |
| 427 | clps_writel(ch, UARTDR(port)); |
| 428 | } |
| 429 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 430 | /* |
| 431 | * Print a string to the serial port trying not to disturb |
| 432 | * any possible real use of the port... |
| 433 | * |
| 434 | * The console_lock must be held when we get here. |
| 435 | * |
| 436 | * Note that this is called with interrupts already disabled |
| 437 | */ |
| 438 | static void |
| 439 | clps711xuart_console_write(struct console *co, const char *s, |
| 440 | unsigned int count) |
| 441 | { |
| 442 | struct uart_port *port = clps711x_ports + co->index; |
| 443 | unsigned int status, syscon; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 444 | |
| 445 | /* |
| 446 | * Ensure that the port is enabled. |
| 447 | */ |
| 448 | syscon = clps_readl(SYSCON(port)); |
| 449 | clps_writel(syscon | SYSCON_UARTEN, SYSCON(port)); |
| 450 | |
Russell King | d358788 | 2006-03-20 20:00:09 +0000 | [diff] [blame] | 451 | uart_console_write(port, s, count, clps711xuart_console_putchar); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 452 | |
| 453 | /* |
| 454 | * Finally, wait for transmitter to become empty |
| 455 | * and restore the uart state. |
| 456 | */ |
| 457 | do { |
| 458 | status = clps_readl(SYSFLG(port)); |
| 459 | } while (status & SYSFLG_UBUSY); |
| 460 | |
| 461 | clps_writel(syscon, SYSCON(port)); |
| 462 | } |
| 463 | |
| 464 | static void __init |
| 465 | clps711xuart_console_get_options(struct uart_port *port, int *baud, |
| 466 | int *parity, int *bits) |
| 467 | { |
| 468 | if (clps_readl(SYSCON(port)) & SYSCON_UARTEN) { |
| 469 | unsigned int ubrlcr, quot; |
| 470 | |
| 471 | ubrlcr = clps_readl(UBRLCR(port)); |
| 472 | |
| 473 | *parity = 'n'; |
| 474 | if (ubrlcr & UBRLCR_PRTEN) { |
| 475 | if (ubrlcr & UBRLCR_EVENPRT) |
| 476 | *parity = 'e'; |
| 477 | else |
| 478 | *parity = 'o'; |
| 479 | } |
| 480 | |
| 481 | if ((ubrlcr & UBRLCR_WRDLEN_MASK) == UBRLCR_WRDLEN7) |
| 482 | *bits = 7; |
| 483 | else |
| 484 | *bits = 8; |
| 485 | |
| 486 | quot = ubrlcr & UBRLCR_BAUD_MASK; |
| 487 | *baud = port->uartclk / (16 * (quot + 1)); |
| 488 | } |
| 489 | } |
| 490 | |
| 491 | static int __init clps711xuart_console_setup(struct console *co, char *options) |
| 492 | { |
| 493 | struct uart_port *port; |
| 494 | int baud = 38400; |
| 495 | int bits = 8; |
| 496 | int parity = 'n'; |
| 497 | int flow = 'n'; |
| 498 | |
| 499 | /* |
| 500 | * Check whether an invalid uart number has been specified, and |
| 501 | * if so, search for the first available port that does have |
| 502 | * console support. |
| 503 | */ |
| 504 | port = uart_get_console(clps711x_ports, UART_NR, co); |
| 505 | |
| 506 | if (options) |
| 507 | uart_parse_options(options, &baud, &parity, &bits, &flow); |
| 508 | else |
| 509 | clps711xuart_console_get_options(port, &baud, &parity, &bits); |
| 510 | |
| 511 | return uart_set_options(port, co, baud, parity, bits, flow); |
| 512 | } |
| 513 | |
Vincent Sanders | 2d93486 | 2005-09-14 22:36:03 +0100 | [diff] [blame] | 514 | static struct uart_driver clps711x_reg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 515 | static struct console clps711x_console = { |
| 516 | .name = "ttyCL", |
| 517 | .write = clps711xuart_console_write, |
| 518 | .device = uart_console_device, |
| 519 | .setup = clps711xuart_console_setup, |
| 520 | .flags = CON_PRINTBUFFER, |
| 521 | .index = -1, |
| 522 | .data = &clps711x_reg, |
| 523 | }; |
| 524 | |
| 525 | static int __init clps711xuart_console_init(void) |
| 526 | { |
| 527 | register_console(&clps711x_console); |
| 528 | return 0; |
| 529 | } |
| 530 | console_initcall(clps711xuart_console_init); |
| 531 | |
| 532 | #define CLPS711X_CONSOLE &clps711x_console |
| 533 | #else |
| 534 | #define CLPS711X_CONSOLE NULL |
| 535 | #endif |
| 536 | |
| 537 | static struct uart_driver clps711x_reg = { |
| 538 | .driver_name = "ttyCL", |
| 539 | .dev_name = "ttyCL", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 540 | .major = SERIAL_CLPS711X_MAJOR, |
| 541 | .minor = SERIAL_CLPS711X_MINOR, |
| 542 | .nr = UART_NR, |
| 543 | |
| 544 | .cons = CLPS711X_CONSOLE, |
| 545 | }; |
| 546 | |
| 547 | static int __init clps711xuart_init(void) |
| 548 | { |
| 549 | int ret, i; |
| 550 | |
Adrian Bunk | d87a6d9 | 2008-07-16 21:53:31 +0100 | [diff] [blame] | 551 | printk(KERN_INFO "Serial: CLPS711x driver\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 552 | |
| 553 | ret = uart_register_driver(&clps711x_reg); |
| 554 | if (ret) |
| 555 | return ret; |
| 556 | |
| 557 | for (i = 0; i < UART_NR; i++) |
| 558 | uart_add_one_port(&clps711x_reg, &clps711x_ports[i]); |
| 559 | |
| 560 | return 0; |
| 561 | } |
| 562 | |
| 563 | static void __exit clps711xuart_exit(void) |
| 564 | { |
| 565 | int i; |
| 566 | |
| 567 | for (i = 0; i < UART_NR; i++) |
| 568 | uart_remove_one_port(&clps711x_reg, &clps711x_ports[i]); |
| 569 | |
| 570 | uart_unregister_driver(&clps711x_reg); |
| 571 | } |
| 572 | |
| 573 | module_init(clps711xuart_init); |
| 574 | module_exit(clps711xuart_exit); |
| 575 | |
| 576 | MODULE_AUTHOR("Deep Blue Solutions Ltd"); |
Adrian Bunk | d87a6d9 | 2008-07-16 21:53:31 +0100 | [diff] [blame] | 577 | MODULE_DESCRIPTION("CLPS-711x generic serial driver"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 578 | MODULE_LICENSE("GPL"); |
| 579 | MODULE_ALIAS_CHARDEV(SERIAL_CLPS711X_MAJOR, SERIAL_CLPS711X_MINOR); |