Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Driver for NEC VR4100 series Serial Interface Unit. |
| 3 | * |
Yoichi Yuasa | ada8e95 | 2009-07-03 00:39:38 +0900 | [diff] [blame] | 4 | * Copyright (C) 2004-2008 Yoichi Yuasa <yuasa@linux-mips.org> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | * |
| 6 | * Based on drivers/serial/8250.c, by Russell King. |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License as published by |
| 10 | * the Free Software Foundation; either version 2 of the License, or |
| 11 | * (at your option) any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | * GNU General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License |
| 19 | * along with this program; if not, write to the Free Software |
| 20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 21 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | |
| 23 | #if defined(CONFIG_SERIAL_VR41XX_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) |
| 24 | #define SUPPORT_SYSRQ |
| 25 | #endif |
| 26 | |
| 27 | #include <linux/console.h> |
Yoichi Yuasa | 8916494 | 2007-05-09 00:03:02 +0900 | [diff] [blame] | 28 | #include <linux/errno.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | #include <linux/init.h> |
| 30 | #include <linux/interrupt.h> |
Yoichi Yuasa | 8916494 | 2007-05-09 00:03:02 +0900 | [diff] [blame] | 31 | #include <linux/ioport.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | #include <linux/module.h> |
Yoichi Yuasa | 8916494 | 2007-05-09 00:03:02 +0900 | [diff] [blame] | 33 | #include <linux/platform_device.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | #include <linux/serial.h> |
| 35 | #include <linux/serial_core.h> |
| 36 | #include <linux/serial_reg.h> |
| 37 | #include <linux/tty.h> |
| 38 | #include <linux/tty_flip.h> |
| 39 | |
| 40 | #include <asm/io.h> |
| 41 | #include <asm/vr41xx/siu.h> |
| 42 | #include <asm/vr41xx/vr41xx.h> |
| 43 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | #define SIU_BAUD_BASE 1152000 |
| 45 | #define SIU_MAJOR 204 |
| 46 | #define SIU_MINOR_BASE 82 |
| 47 | |
| 48 | #define RX_MAX_COUNT 256 |
| 49 | #define TX_MAX_COUNT 15 |
| 50 | |
| 51 | #define SIUIRSEL 0x08 |
| 52 | #define TMICMODE 0x20 |
| 53 | #define TMICTX 0x10 |
| 54 | #define IRMSEL 0x0c |
| 55 | #define IRMSEL_HP 0x08 |
| 56 | #define IRMSEL_TEMIC 0x04 |
| 57 | #define IRMSEL_SHARP 0x00 |
| 58 | #define IRUSESEL 0x02 |
| 59 | #define SIRSEL 0x01 |
| 60 | |
Yoichi Yuasa | 8916494 | 2007-05-09 00:03:02 +0900 | [diff] [blame] | 61 | static struct uart_port siu_uart_ports[SIU_PORTS_MAX] = { |
| 62 | [0 ... SIU_PORTS_MAX-1] = { |
| 63 | .lock = __SPIN_LOCK_UNLOCKED(siu_uart_ports->lock), |
| 64 | .irq = -1, |
| 65 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | }; |
| 67 | |
Yoichi Yuasa | 2174041 | 2007-07-31 00:38:56 -0700 | [diff] [blame] | 68 | #ifdef CONFIG_SERIAL_VR41XX_CONSOLE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | static uint8_t lsr_break_flag[SIU_PORTS_MAX]; |
Yoichi Yuasa | 2174041 | 2007-07-31 00:38:56 -0700 | [diff] [blame] | 70 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | |
| 72 | #define siu_read(port, offset) readb((port)->membase + (offset)) |
| 73 | #define siu_write(port, offset, value) writeb((value), (port)->membase + (offset)) |
| 74 | |
| 75 | void vr41xx_select_siu_interface(siu_interface_t interface) |
| 76 | { |
| 77 | struct uart_port *port; |
| 78 | unsigned long flags; |
| 79 | uint8_t irsel; |
| 80 | |
| 81 | port = &siu_uart_ports[0]; |
| 82 | |
| 83 | spin_lock_irqsave(&port->lock, flags); |
| 84 | |
| 85 | irsel = siu_read(port, SIUIRSEL); |
| 86 | if (interface == SIU_INTERFACE_IRDA) |
| 87 | irsel |= SIRSEL; |
| 88 | else |
| 89 | irsel &= ~SIRSEL; |
| 90 | siu_write(port, SIUIRSEL, irsel); |
| 91 | |
| 92 | spin_unlock_irqrestore(&port->lock, flags); |
| 93 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | EXPORT_SYMBOL_GPL(vr41xx_select_siu_interface); |
| 95 | |
| 96 | void vr41xx_use_irda(irda_use_t use) |
| 97 | { |
| 98 | struct uart_port *port; |
| 99 | unsigned long flags; |
| 100 | uint8_t irsel; |
| 101 | |
| 102 | port = &siu_uart_ports[0]; |
| 103 | |
| 104 | spin_lock_irqsave(&port->lock, flags); |
| 105 | |
| 106 | irsel = siu_read(port, SIUIRSEL); |
| 107 | if (use == FIR_USE_IRDA) |
| 108 | irsel |= IRUSESEL; |
| 109 | else |
| 110 | irsel &= ~IRUSESEL; |
| 111 | siu_write(port, SIUIRSEL, irsel); |
| 112 | |
| 113 | spin_unlock_irqrestore(&port->lock, flags); |
| 114 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | EXPORT_SYMBOL_GPL(vr41xx_use_irda); |
| 116 | |
| 117 | void vr41xx_select_irda_module(irda_module_t module, irda_speed_t speed) |
| 118 | { |
| 119 | struct uart_port *port; |
| 120 | unsigned long flags; |
| 121 | uint8_t irsel; |
| 122 | |
| 123 | port = &siu_uart_ports[0]; |
| 124 | |
| 125 | spin_lock_irqsave(&port->lock, flags); |
| 126 | |
| 127 | irsel = siu_read(port, SIUIRSEL); |
| 128 | irsel &= ~(IRMSEL | TMICTX | TMICMODE); |
| 129 | switch (module) { |
| 130 | case SHARP_IRDA: |
| 131 | irsel |= IRMSEL_SHARP; |
| 132 | break; |
| 133 | case TEMIC_IRDA: |
| 134 | irsel |= IRMSEL_TEMIC | TMICMODE; |
| 135 | if (speed == IRDA_TX_4MBPS) |
| 136 | irsel |= TMICTX; |
| 137 | break; |
| 138 | case HP_IRDA: |
| 139 | irsel |= IRMSEL_HP; |
| 140 | break; |
| 141 | default: |
| 142 | break; |
| 143 | } |
| 144 | siu_write(port, SIUIRSEL, irsel); |
| 145 | |
| 146 | spin_unlock_irqrestore(&port->lock, flags); |
| 147 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | EXPORT_SYMBOL_GPL(vr41xx_select_irda_module); |
| 149 | |
| 150 | static inline void siu_clear_fifo(struct uart_port *port) |
| 151 | { |
| 152 | siu_write(port, UART_FCR, UART_FCR_ENABLE_FIFO); |
| 153 | siu_write(port, UART_FCR, UART_FCR_ENABLE_FIFO | UART_FCR_CLEAR_RCVR | |
| 154 | UART_FCR_CLEAR_XMIT); |
| 155 | siu_write(port, UART_FCR, 0); |
| 156 | } |
| 157 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | static inline unsigned long siu_port_size(struct uart_port *port) |
| 159 | { |
| 160 | switch (port->type) { |
| 161 | case PORT_VR41XX_SIU: |
| 162 | return 11UL; |
| 163 | case PORT_VR41XX_DSIU: |
| 164 | return 8UL; |
| 165 | } |
| 166 | |
| 167 | return 0; |
| 168 | } |
| 169 | |
| 170 | static inline unsigned int siu_check_type(struct uart_port *port) |
| 171 | { |
Yoichi Yuasa | 8916494 | 2007-05-09 00:03:02 +0900 | [diff] [blame] | 172 | if (port->line == 0) |
| 173 | return PORT_VR41XX_SIU; |
| 174 | if (port->line == 1 && port->irq != -1) |
| 175 | return PORT_VR41XX_DSIU; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | |
| 177 | return PORT_UNKNOWN; |
| 178 | } |
| 179 | |
| 180 | static inline const char *siu_type_name(struct uart_port *port) |
| 181 | { |
| 182 | switch (port->type) { |
| 183 | case PORT_VR41XX_SIU: |
| 184 | return "SIU"; |
| 185 | case PORT_VR41XX_DSIU: |
| 186 | return "DSIU"; |
| 187 | } |
| 188 | |
Yoichi Yuasa | eae936e | 2005-06-04 15:43:34 -0700 | [diff] [blame] | 189 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | } |
| 191 | |
| 192 | static unsigned int siu_tx_empty(struct uart_port *port) |
| 193 | { |
| 194 | uint8_t lsr; |
| 195 | |
| 196 | lsr = siu_read(port, UART_LSR); |
| 197 | if (lsr & UART_LSR_TEMT) |
| 198 | return TIOCSER_TEMT; |
| 199 | |
| 200 | return 0; |
| 201 | } |
| 202 | |
| 203 | static void siu_set_mctrl(struct uart_port *port, unsigned int mctrl) |
| 204 | { |
| 205 | uint8_t mcr = 0; |
| 206 | |
| 207 | if (mctrl & TIOCM_DTR) |
| 208 | mcr |= UART_MCR_DTR; |
| 209 | if (mctrl & TIOCM_RTS) |
| 210 | mcr |= UART_MCR_RTS; |
| 211 | if (mctrl & TIOCM_OUT1) |
| 212 | mcr |= UART_MCR_OUT1; |
| 213 | if (mctrl & TIOCM_OUT2) |
| 214 | mcr |= UART_MCR_OUT2; |
| 215 | if (mctrl & TIOCM_LOOP) |
| 216 | mcr |= UART_MCR_LOOP; |
| 217 | |
| 218 | siu_write(port, UART_MCR, mcr); |
| 219 | } |
| 220 | |
| 221 | static unsigned int siu_get_mctrl(struct uart_port *port) |
| 222 | { |
| 223 | uint8_t msr; |
| 224 | unsigned int mctrl = 0; |
| 225 | |
| 226 | msr = siu_read(port, UART_MSR); |
| 227 | if (msr & UART_MSR_DCD) |
| 228 | mctrl |= TIOCM_CAR; |
| 229 | if (msr & UART_MSR_RI) |
| 230 | mctrl |= TIOCM_RNG; |
| 231 | if (msr & UART_MSR_DSR) |
| 232 | mctrl |= TIOCM_DSR; |
| 233 | if (msr & UART_MSR_CTS) |
| 234 | mctrl |= TIOCM_CTS; |
| 235 | |
| 236 | return mctrl; |
| 237 | } |
| 238 | |
Russell King | b129a8c | 2005-08-31 10:12:14 +0100 | [diff] [blame] | 239 | static void siu_stop_tx(struct uart_port *port) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | { |
| 241 | unsigned long flags; |
| 242 | uint8_t ier; |
| 243 | |
| 244 | spin_lock_irqsave(&port->lock, flags); |
| 245 | |
| 246 | ier = siu_read(port, UART_IER); |
| 247 | ier &= ~UART_IER_THRI; |
| 248 | siu_write(port, UART_IER, ier); |
| 249 | |
| 250 | spin_unlock_irqrestore(&port->lock, flags); |
| 251 | } |
| 252 | |
Russell King | b129a8c | 2005-08-31 10:12:14 +0100 | [diff] [blame] | 253 | static void siu_start_tx(struct uart_port *port) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | { |
| 255 | unsigned long flags; |
| 256 | uint8_t ier; |
| 257 | |
| 258 | spin_lock_irqsave(&port->lock, flags); |
| 259 | |
| 260 | ier = siu_read(port, UART_IER); |
| 261 | ier |= UART_IER_THRI; |
| 262 | siu_write(port, UART_IER, ier); |
| 263 | |
| 264 | spin_unlock_irqrestore(&port->lock, flags); |
| 265 | } |
| 266 | |
| 267 | static void siu_stop_rx(struct uart_port *port) |
| 268 | { |
| 269 | unsigned long flags; |
| 270 | uint8_t ier; |
| 271 | |
| 272 | spin_lock_irqsave(&port->lock, flags); |
| 273 | |
| 274 | ier = siu_read(port, UART_IER); |
| 275 | ier &= ~UART_IER_RLSI; |
| 276 | siu_write(port, UART_IER, ier); |
| 277 | |
| 278 | port->read_status_mask &= ~UART_LSR_DR; |
| 279 | |
| 280 | spin_unlock_irqrestore(&port->lock, flags); |
| 281 | } |
| 282 | |
| 283 | static void siu_enable_ms(struct uart_port *port) |
| 284 | { |
| 285 | unsigned long flags; |
| 286 | uint8_t ier; |
| 287 | |
| 288 | spin_lock_irqsave(&port->lock, flags); |
| 289 | |
| 290 | ier = siu_read(port, UART_IER); |
| 291 | ier |= UART_IER_MSI; |
| 292 | siu_write(port, UART_IER, ier); |
| 293 | |
| 294 | spin_unlock_irqrestore(&port->lock, flags); |
| 295 | } |
| 296 | |
| 297 | static void siu_break_ctl(struct uart_port *port, int ctl) |
| 298 | { |
| 299 | unsigned long flags; |
| 300 | uint8_t lcr; |
| 301 | |
| 302 | spin_lock_irqsave(&port->lock, flags); |
| 303 | |
| 304 | lcr = siu_read(port, UART_LCR); |
| 305 | if (ctl == -1) |
| 306 | lcr |= UART_LCR_SBC; |
| 307 | else |
| 308 | lcr &= ~UART_LCR_SBC; |
| 309 | siu_write(port, UART_LCR, lcr); |
| 310 | |
| 311 | spin_unlock_irqrestore(&port->lock, flags); |
| 312 | } |
| 313 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 314 | static inline void receive_chars(struct uart_port *port, uint8_t *status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | { |
| 316 | struct tty_struct *tty; |
| 317 | uint8_t lsr, ch; |
| 318 | char flag; |
| 319 | int max_count = RX_MAX_COUNT; |
| 320 | |
Alan Cox | ebd2c8f | 2009-09-19 13:13:28 -0700 | [diff] [blame] | 321 | tty = port->state->port.tty; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 322 | lsr = *status; |
| 323 | |
| 324 | do { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 325 | ch = siu_read(port, UART_RX); |
| 326 | port->icount.rx++; |
| 327 | flag = TTY_NORMAL; |
| 328 | |
| 329 | #ifdef CONFIG_SERIAL_VR41XX_CONSOLE |
| 330 | lsr |= lsr_break_flag[port->line]; |
| 331 | lsr_break_flag[port->line] = 0; |
| 332 | #endif |
| 333 | if (unlikely(lsr & (UART_LSR_BI | UART_LSR_FE | |
| 334 | UART_LSR_PE | UART_LSR_OE))) { |
| 335 | if (lsr & UART_LSR_BI) { |
| 336 | lsr &= ~(UART_LSR_FE | UART_LSR_PE); |
| 337 | port->icount.brk++; |
| 338 | |
| 339 | if (uart_handle_break(port)) |
| 340 | goto ignore_char; |
| 341 | } |
| 342 | |
| 343 | if (lsr & UART_LSR_FE) |
| 344 | port->icount.frame++; |
| 345 | if (lsr & UART_LSR_PE) |
| 346 | port->icount.parity++; |
| 347 | if (lsr & UART_LSR_OE) |
| 348 | port->icount.overrun++; |
| 349 | |
| 350 | lsr &= port->read_status_mask; |
| 351 | if (lsr & UART_LSR_BI) |
| 352 | flag = TTY_BREAK; |
| 353 | if (lsr & UART_LSR_FE) |
| 354 | flag = TTY_FRAME; |
| 355 | if (lsr & UART_LSR_PE) |
| 356 | flag = TTY_PARITY; |
| 357 | } |
| 358 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 359 | if (uart_handle_sysrq_char(port, ch)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | goto ignore_char; |
Russell King | 05ab301 | 2005-05-09 23:21:59 +0100 | [diff] [blame] | 361 | |
| 362 | uart_insert_char(port, lsr, UART_LSR_OE, ch, flag); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 363 | |
| 364 | ignore_char: |
| 365 | lsr = siu_read(port, UART_LSR); |
| 366 | } while ((lsr & UART_LSR_DR) && (max_count-- > 0)); |
| 367 | |
| 368 | tty_flip_buffer_push(tty); |
| 369 | |
| 370 | *status = lsr; |
| 371 | } |
| 372 | |
| 373 | static inline void check_modem_status(struct uart_port *port) |
| 374 | { |
| 375 | uint8_t msr; |
| 376 | |
| 377 | msr = siu_read(port, UART_MSR); |
| 378 | if ((msr & UART_MSR_ANY_DELTA) == 0) |
| 379 | return; |
| 380 | if (msr & UART_MSR_DDCD) |
| 381 | uart_handle_dcd_change(port, msr & UART_MSR_DCD); |
| 382 | if (msr & UART_MSR_TERI) |
| 383 | port->icount.rng++; |
| 384 | if (msr & UART_MSR_DDSR) |
| 385 | port->icount.dsr++; |
| 386 | if (msr & UART_MSR_DCTS) |
| 387 | uart_handle_cts_change(port, msr & UART_MSR_CTS); |
| 388 | |
Alan Cox | bdc04e3 | 2009-09-19 13:13:31 -0700 | [diff] [blame] | 389 | wake_up_interruptible(&port->state->port.delta_msr_wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 390 | } |
| 391 | |
| 392 | static inline void transmit_chars(struct uart_port *port) |
| 393 | { |
| 394 | struct circ_buf *xmit; |
| 395 | int max_count = TX_MAX_COUNT; |
| 396 | |
Alan Cox | ebd2c8f | 2009-09-19 13:13:28 -0700 | [diff] [blame] | 397 | xmit = &port->state->xmit; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 398 | |
| 399 | if (port->x_char) { |
| 400 | siu_write(port, UART_TX, port->x_char); |
| 401 | port->icount.tx++; |
| 402 | port->x_char = 0; |
| 403 | return; |
| 404 | } |
| 405 | |
| 406 | if (uart_circ_empty(xmit) || uart_tx_stopped(port)) { |
Russell King | b129a8c | 2005-08-31 10:12:14 +0100 | [diff] [blame] | 407 | siu_stop_tx(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 408 | return; |
| 409 | } |
| 410 | |
| 411 | do { |
| 412 | siu_write(port, UART_TX, xmit->buf[xmit->tail]); |
| 413 | xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); |
| 414 | port->icount.tx++; |
| 415 | if (uart_circ_empty(xmit)) |
| 416 | break; |
| 417 | } while (max_count-- > 0); |
| 418 | |
| 419 | if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) |
| 420 | uart_write_wakeup(port); |
| 421 | |
| 422 | if (uart_circ_empty(xmit)) |
Russell King | b129a8c | 2005-08-31 10:12:14 +0100 | [diff] [blame] | 423 | siu_stop_tx(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 424 | } |
| 425 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 426 | static irqreturn_t siu_interrupt(int irq, void *dev_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | { |
| 428 | struct uart_port *port; |
| 429 | uint8_t iir, lsr; |
| 430 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 431 | port = (struct uart_port *)dev_id; |
| 432 | |
| 433 | iir = siu_read(port, UART_IIR); |
| 434 | if (iir & UART_IIR_NO_INT) |
| 435 | return IRQ_NONE; |
| 436 | |
| 437 | lsr = siu_read(port, UART_LSR); |
| 438 | if (lsr & UART_LSR_DR) |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 439 | receive_chars(port, &lsr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 440 | |
| 441 | check_modem_status(port); |
| 442 | |
| 443 | if (lsr & UART_LSR_THRE) |
| 444 | transmit_chars(port); |
| 445 | |
| 446 | return IRQ_HANDLED; |
| 447 | } |
| 448 | |
| 449 | static int siu_startup(struct uart_port *port) |
| 450 | { |
| 451 | int retval; |
| 452 | |
Yoichi Yuasa | eae936e | 2005-06-04 15:43:34 -0700 | [diff] [blame] | 453 | if (port->membase == NULL) |
| 454 | return -ENODEV; |
| 455 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 456 | siu_clear_fifo(port); |
| 457 | |
| 458 | (void)siu_read(port, UART_LSR); |
| 459 | (void)siu_read(port, UART_RX); |
| 460 | (void)siu_read(port, UART_IIR); |
| 461 | (void)siu_read(port, UART_MSR); |
| 462 | |
| 463 | if (siu_read(port, UART_LSR) == 0xff) |
| 464 | return -ENODEV; |
| 465 | |
| 466 | retval = request_irq(port->irq, siu_interrupt, 0, siu_type_name(port), port); |
| 467 | if (retval) |
| 468 | return retval; |
| 469 | |
| 470 | if (port->type == PORT_VR41XX_DSIU) |
| 471 | vr41xx_enable_dsiuint(DSIUINT_ALL); |
| 472 | |
| 473 | siu_write(port, UART_LCR, UART_LCR_WLEN8); |
| 474 | |
| 475 | spin_lock_irq(&port->lock); |
| 476 | siu_set_mctrl(port, port->mctrl); |
| 477 | spin_unlock_irq(&port->lock); |
| 478 | |
| 479 | siu_write(port, UART_IER, UART_IER_RLSI | UART_IER_RDI); |
| 480 | |
| 481 | (void)siu_read(port, UART_LSR); |
| 482 | (void)siu_read(port, UART_RX); |
| 483 | (void)siu_read(port, UART_IIR); |
| 484 | (void)siu_read(port, UART_MSR); |
| 485 | |
| 486 | return 0; |
| 487 | } |
| 488 | |
| 489 | static void siu_shutdown(struct uart_port *port) |
| 490 | { |
| 491 | unsigned long flags; |
| 492 | uint8_t lcr; |
| 493 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 494 | siu_write(port, UART_IER, 0); |
| 495 | |
| 496 | spin_lock_irqsave(&port->lock, flags); |
| 497 | |
| 498 | port->mctrl &= ~TIOCM_OUT2; |
| 499 | siu_set_mctrl(port, port->mctrl); |
| 500 | |
| 501 | spin_unlock_irqrestore(&port->lock, flags); |
| 502 | |
| 503 | lcr = siu_read(port, UART_LCR); |
| 504 | lcr &= ~UART_LCR_SBC; |
| 505 | siu_write(port, UART_LCR, lcr); |
| 506 | |
| 507 | siu_clear_fifo(port); |
| 508 | |
| 509 | (void)siu_read(port, UART_RX); |
| 510 | |
| 511 | if (port->type == PORT_VR41XX_DSIU) |
| 512 | vr41xx_disable_dsiuint(DSIUINT_ALL); |
| 513 | |
| 514 | free_irq(port->irq, port); |
| 515 | } |
| 516 | |
Alan Cox | 606d099 | 2006-12-08 02:38:45 -0800 | [diff] [blame] | 517 | static void siu_set_termios(struct uart_port *port, struct ktermios *new, |
| 518 | struct ktermios *old) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 519 | { |
| 520 | tcflag_t c_cflag, c_iflag; |
| 521 | uint8_t lcr, fcr, ier; |
| 522 | unsigned int baud, quot; |
| 523 | unsigned long flags; |
| 524 | |
| 525 | c_cflag = new->c_cflag; |
| 526 | switch (c_cflag & CSIZE) { |
| 527 | case CS5: |
| 528 | lcr = UART_LCR_WLEN5; |
| 529 | break; |
| 530 | case CS6: |
| 531 | lcr = UART_LCR_WLEN6; |
| 532 | break; |
| 533 | case CS7: |
| 534 | lcr = UART_LCR_WLEN7; |
| 535 | break; |
| 536 | default: |
| 537 | lcr = UART_LCR_WLEN8; |
| 538 | break; |
| 539 | } |
| 540 | |
| 541 | if (c_cflag & CSTOPB) |
| 542 | lcr |= UART_LCR_STOP; |
| 543 | if (c_cflag & PARENB) |
| 544 | lcr |= UART_LCR_PARITY; |
| 545 | if ((c_cflag & PARODD) != PARODD) |
| 546 | lcr |= UART_LCR_EPAR; |
| 547 | if (c_cflag & CMSPAR) |
| 548 | lcr |= UART_LCR_SPAR; |
| 549 | |
| 550 | baud = uart_get_baud_rate(port, new, old, 0, port->uartclk/16); |
| 551 | quot = uart_get_divisor(port, baud); |
| 552 | |
| 553 | fcr = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_10; |
| 554 | |
| 555 | spin_lock_irqsave(&port->lock, flags); |
| 556 | |
| 557 | uart_update_timeout(port, c_cflag, baud); |
| 558 | |
| 559 | c_iflag = new->c_iflag; |
| 560 | |
| 561 | port->read_status_mask = UART_LSR_THRE | UART_LSR_OE | UART_LSR_DR; |
| 562 | if (c_iflag & INPCK) |
| 563 | port->read_status_mask |= UART_LSR_FE | UART_LSR_PE; |
| 564 | if (c_iflag & (BRKINT | PARMRK)) |
| 565 | port->read_status_mask |= UART_LSR_BI; |
| 566 | |
| 567 | port->ignore_status_mask = 0; |
| 568 | if (c_iflag & IGNPAR) |
| 569 | port->ignore_status_mask |= UART_LSR_FE | UART_LSR_PE; |
| 570 | if (c_iflag & IGNBRK) { |
| 571 | port->ignore_status_mask |= UART_LSR_BI; |
| 572 | if (c_iflag & IGNPAR) |
| 573 | port->ignore_status_mask |= UART_LSR_OE; |
| 574 | } |
| 575 | |
| 576 | if ((c_cflag & CREAD) == 0) |
| 577 | port->ignore_status_mask |= UART_LSR_DR; |
| 578 | |
| 579 | ier = siu_read(port, UART_IER); |
| 580 | ier &= ~UART_IER_MSI; |
| 581 | if (UART_ENABLE_MS(port, c_cflag)) |
| 582 | ier |= UART_IER_MSI; |
| 583 | siu_write(port, UART_IER, ier); |
| 584 | |
| 585 | siu_write(port, UART_LCR, lcr | UART_LCR_DLAB); |
| 586 | |
| 587 | siu_write(port, UART_DLL, (uint8_t)quot); |
| 588 | siu_write(port, UART_DLM, (uint8_t)(quot >> 8)); |
| 589 | |
| 590 | siu_write(port, UART_LCR, lcr); |
| 591 | |
| 592 | siu_write(port, UART_FCR, fcr); |
| 593 | |
| 594 | siu_set_mctrl(port, port->mctrl); |
| 595 | |
| 596 | spin_unlock_irqrestore(&port->lock, flags); |
| 597 | } |
| 598 | |
| 599 | static void siu_pm(struct uart_port *port, unsigned int state, unsigned int oldstate) |
| 600 | { |
| 601 | switch (state) { |
| 602 | case 0: |
| 603 | switch (port->type) { |
| 604 | case PORT_VR41XX_SIU: |
| 605 | vr41xx_supply_clock(SIU_CLOCK); |
| 606 | break; |
| 607 | case PORT_VR41XX_DSIU: |
| 608 | vr41xx_supply_clock(DSIU_CLOCK); |
| 609 | break; |
| 610 | } |
| 611 | break; |
| 612 | case 3: |
| 613 | switch (port->type) { |
| 614 | case PORT_VR41XX_SIU: |
| 615 | vr41xx_mask_clock(SIU_CLOCK); |
| 616 | break; |
| 617 | case PORT_VR41XX_DSIU: |
| 618 | vr41xx_mask_clock(DSIU_CLOCK); |
| 619 | break; |
| 620 | } |
| 621 | break; |
| 622 | } |
| 623 | } |
| 624 | |
| 625 | static const char *siu_type(struct uart_port *port) |
| 626 | { |
| 627 | return siu_type_name(port); |
| 628 | } |
| 629 | |
| 630 | static void siu_release_port(struct uart_port *port) |
| 631 | { |
| 632 | unsigned long size; |
| 633 | |
| 634 | if (port->flags & UPF_IOREMAP) { |
| 635 | iounmap(port->membase); |
| 636 | port->membase = NULL; |
| 637 | } |
| 638 | |
| 639 | size = siu_port_size(port); |
| 640 | release_mem_region(port->mapbase, size); |
| 641 | } |
| 642 | |
| 643 | static int siu_request_port(struct uart_port *port) |
| 644 | { |
| 645 | unsigned long size; |
| 646 | struct resource *res; |
| 647 | |
| 648 | size = siu_port_size(port); |
| 649 | res = request_mem_region(port->mapbase, size, siu_type_name(port)); |
| 650 | if (res == NULL) |
| 651 | return -EBUSY; |
| 652 | |
| 653 | if (port->flags & UPF_IOREMAP) { |
| 654 | port->membase = ioremap(port->mapbase, size); |
| 655 | if (port->membase == NULL) { |
| 656 | release_resource(res); |
| 657 | return -ENOMEM; |
| 658 | } |
| 659 | } |
| 660 | |
| 661 | return 0; |
| 662 | } |
| 663 | |
| 664 | static void siu_config_port(struct uart_port *port, int flags) |
| 665 | { |
| 666 | if (flags & UART_CONFIG_TYPE) { |
| 667 | port->type = siu_check_type(port); |
| 668 | (void)siu_request_port(port); |
| 669 | } |
| 670 | } |
| 671 | |
| 672 | static int siu_verify_port(struct uart_port *port, struct serial_struct *serial) |
| 673 | { |
| 674 | if (port->type != PORT_VR41XX_SIU && port->type != PORT_VR41XX_DSIU) |
| 675 | return -EINVAL; |
| 676 | if (port->irq != serial->irq) |
| 677 | return -EINVAL; |
| 678 | if (port->iotype != serial->io_type) |
| 679 | return -EINVAL; |
| 680 | if (port->mapbase != (unsigned long)serial->iomem_base) |
| 681 | return -EINVAL; |
| 682 | |
| 683 | return 0; |
| 684 | } |
| 685 | |
| 686 | static struct uart_ops siu_uart_ops = { |
| 687 | .tx_empty = siu_tx_empty, |
| 688 | .set_mctrl = siu_set_mctrl, |
| 689 | .get_mctrl = siu_get_mctrl, |
| 690 | .stop_tx = siu_stop_tx, |
| 691 | .start_tx = siu_start_tx, |
| 692 | .stop_rx = siu_stop_rx, |
| 693 | .enable_ms = siu_enable_ms, |
| 694 | .break_ctl = siu_break_ctl, |
| 695 | .startup = siu_startup, |
| 696 | .shutdown = siu_shutdown, |
| 697 | .set_termios = siu_set_termios, |
| 698 | .pm = siu_pm, |
| 699 | .type = siu_type, |
| 700 | .release_port = siu_release_port, |
| 701 | .request_port = siu_request_port, |
| 702 | .config_port = siu_config_port, |
| 703 | .verify_port = siu_verify_port, |
| 704 | }; |
| 705 | |
Yoichi Yuasa | 8916494 | 2007-05-09 00:03:02 +0900 | [diff] [blame] | 706 | static int siu_init_ports(struct platform_device *pdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 707 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 708 | struct uart_port *port; |
Yoichi Yuasa | 8916494 | 2007-05-09 00:03:02 +0900 | [diff] [blame] | 709 | struct resource *res; |
| 710 | int *type = pdev->dev.platform_data; |
| 711 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 712 | |
Yoichi Yuasa | 8916494 | 2007-05-09 00:03:02 +0900 | [diff] [blame] | 713 | if (!type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 714 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 715 | |
| 716 | port = siu_uart_ports; |
Yoichi Yuasa | 8916494 | 2007-05-09 00:03:02 +0900 | [diff] [blame] | 717 | for (i = 0; i < SIU_PORTS_MAX; i++) { |
| 718 | port->type = type[i]; |
| 719 | if (port->type == PORT_UNKNOWN) |
| 720 | continue; |
| 721 | port->irq = platform_get_irq(pdev, i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 722 | port->uartclk = SIU_BAUD_BASE * 16; |
| 723 | port->fifosize = 16; |
| 724 | port->regshift = 0; |
| 725 | port->iotype = UPIO_MEM; |
| 726 | port->flags = UPF_IOREMAP | UPF_BOOT_AUTOCONF; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 727 | port->line = i; |
Yoichi Yuasa | 8916494 | 2007-05-09 00:03:02 +0900 | [diff] [blame] | 728 | res = platform_get_resource(pdev, IORESOURCE_MEM, i); |
| 729 | port->mapbase = res->start; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 730 | port++; |
| 731 | } |
| 732 | |
Yoichi Yuasa | 8916494 | 2007-05-09 00:03:02 +0900 | [diff] [blame] | 733 | return i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 734 | } |
| 735 | |
| 736 | #ifdef CONFIG_SERIAL_VR41XX_CONSOLE |
| 737 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 738 | #define BOTH_EMPTY (UART_LSR_TEMT | UART_LSR_THRE) |
| 739 | |
| 740 | static void wait_for_xmitr(struct uart_port *port) |
| 741 | { |
| 742 | int timeout = 10000; |
| 743 | uint8_t lsr, msr; |
| 744 | |
| 745 | do { |
| 746 | lsr = siu_read(port, UART_LSR); |
| 747 | if (lsr & UART_LSR_BI) |
| 748 | lsr_break_flag[port->line] = UART_LSR_BI; |
| 749 | |
| 750 | if ((lsr & BOTH_EMPTY) == BOTH_EMPTY) |
| 751 | break; |
| 752 | } while (timeout-- > 0); |
| 753 | |
| 754 | if (port->flags & UPF_CONS_FLOW) { |
| 755 | timeout = 1000000; |
| 756 | |
| 757 | do { |
| 758 | msr = siu_read(port, UART_MSR); |
| 759 | if ((msr & UART_MSR_CTS) != 0) |
| 760 | break; |
| 761 | } while (timeout-- > 0); |
| 762 | } |
| 763 | } |
| 764 | |
Russell King | d358788 | 2006-03-20 20:00:09 +0000 | [diff] [blame] | 765 | static void siu_console_putchar(struct uart_port *port, int ch) |
| 766 | { |
| 767 | wait_for_xmitr(port); |
| 768 | siu_write(port, UART_TX, ch); |
| 769 | } |
| 770 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 771 | static void siu_console_write(struct console *con, const char *s, unsigned count) |
| 772 | { |
| 773 | struct uart_port *port; |
| 774 | uint8_t ier; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 775 | |
| 776 | port = &siu_uart_ports[con->index]; |
| 777 | |
| 778 | ier = siu_read(port, UART_IER); |
| 779 | siu_write(port, UART_IER, 0); |
| 780 | |
Russell King | d358788 | 2006-03-20 20:00:09 +0000 | [diff] [blame] | 781 | uart_console_write(port, s, count, siu_console_putchar); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 782 | |
| 783 | wait_for_xmitr(port); |
| 784 | siu_write(port, UART_IER, ier); |
| 785 | } |
| 786 | |
Yoichi Yuasa | a24ac9f | 2007-07-31 00:38:55 -0700 | [diff] [blame] | 787 | static int __init siu_console_setup(struct console *con, char *options) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 788 | { |
| 789 | struct uart_port *port; |
| 790 | int baud = 9600; |
| 791 | int parity = 'n'; |
| 792 | int bits = 8; |
| 793 | int flow = 'n'; |
| 794 | |
| 795 | if (con->index >= SIU_PORTS_MAX) |
| 796 | con->index = 0; |
| 797 | |
| 798 | port = &siu_uart_ports[con->index]; |
| 799 | if (port->membase == NULL) { |
| 800 | if (port->mapbase == 0) |
| 801 | return -ENODEV; |
Yoichi Yuasa | eae936e | 2005-06-04 15:43:34 -0700 | [diff] [blame] | 802 | port->membase = ioremap(port->mapbase, siu_port_size(port)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 803 | } |
| 804 | |
Yoichi Yuasa | a95d320 | 2007-07-31 00:38:55 -0700 | [diff] [blame] | 805 | if (port->type == PORT_VR41XX_SIU) |
| 806 | vr41xx_select_siu_interface(SIU_INTERFACE_RS232C); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 807 | |
| 808 | if (options != NULL) |
| 809 | uart_parse_options(options, &baud, &parity, &bits, &flow); |
| 810 | |
| 811 | return uart_set_options(port, con, baud, parity, bits, flow); |
| 812 | } |
| 813 | |
| 814 | static struct uart_driver siu_uart_driver; |
| 815 | |
| 816 | static struct console siu_console = { |
| 817 | .name = "ttyVR", |
| 818 | .write = siu_console_write, |
| 819 | .device = uart_console_device, |
| 820 | .setup = siu_console_setup, |
| 821 | .flags = CON_PRINTBUFFER, |
| 822 | .index = -1, |
| 823 | .data = &siu_uart_driver, |
| 824 | }; |
| 825 | |
| 826 | static int __devinit siu_console_init(void) |
| 827 | { |
| 828 | struct uart_port *port; |
Yoichi Yuasa | 8916494 | 2007-05-09 00:03:02 +0900 | [diff] [blame] | 829 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 830 | |
Yoichi Yuasa | 8916494 | 2007-05-09 00:03:02 +0900 | [diff] [blame] | 831 | for (i = 0; i < SIU_PORTS_MAX; i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 832 | port = &siu_uart_ports[i]; |
Yoichi Yuasa | eae936e | 2005-06-04 15:43:34 -0700 | [diff] [blame] | 833 | port->ops = &siu_uart_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 834 | } |
| 835 | |
| 836 | register_console(&siu_console); |
| 837 | |
| 838 | return 0; |
| 839 | } |
| 840 | |
| 841 | console_initcall(siu_console_init); |
| 842 | |
Yoichi Yuasa | baac589 | 2008-04-28 02:14:08 -0700 | [diff] [blame] | 843 | void __init vr41xx_siu_early_setup(struct uart_port *port) |
| 844 | { |
| 845 | if (port->type == PORT_UNKNOWN) |
| 846 | return; |
| 847 | |
| 848 | siu_uart_ports[port->line].line = port->line; |
| 849 | siu_uart_ports[port->line].type = port->type; |
| 850 | siu_uart_ports[port->line].uartclk = SIU_BAUD_BASE * 16; |
| 851 | siu_uart_ports[port->line].mapbase = port->mapbase; |
| 852 | siu_uart_ports[port->line].mapbase = port->mapbase; |
| 853 | siu_uart_ports[port->line].ops = &siu_uart_ops; |
| 854 | } |
| 855 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 856 | #define SERIAL_VR41XX_CONSOLE &siu_console |
| 857 | #else |
| 858 | #define SERIAL_VR41XX_CONSOLE NULL |
| 859 | #endif |
| 860 | |
| 861 | static struct uart_driver siu_uart_driver = { |
| 862 | .owner = THIS_MODULE, |
| 863 | .driver_name = "SIU", |
| 864 | .dev_name = "ttyVR", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 865 | .major = SIU_MAJOR, |
| 866 | .minor = SIU_MINOR_BASE, |
| 867 | .cons = SERIAL_VR41XX_CONSOLE, |
| 868 | }; |
| 869 | |
Dmitry Torokhov | d39b6cf | 2006-03-22 00:07:53 -0800 | [diff] [blame] | 870 | static int __devinit siu_probe(struct platform_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 871 | { |
| 872 | struct uart_port *port; |
| 873 | int num, i, retval; |
| 874 | |
Yoichi Yuasa | 8916494 | 2007-05-09 00:03:02 +0900 | [diff] [blame] | 875 | num = siu_init_ports(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 876 | if (num <= 0) |
| 877 | return -ENODEV; |
| 878 | |
| 879 | siu_uart_driver.nr = num; |
| 880 | retval = uart_register_driver(&siu_uart_driver); |
| 881 | if (retval) |
| 882 | return retval; |
| 883 | |
| 884 | for (i = 0; i < num; i++) { |
| 885 | port = &siu_uart_ports[i]; |
| 886 | port->ops = &siu_uart_ops; |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 887 | port->dev = &dev->dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 888 | |
| 889 | retval = uart_add_one_port(&siu_uart_driver, port); |
Yoichi Yuasa | eae936e | 2005-06-04 15:43:34 -0700 | [diff] [blame] | 890 | if (retval < 0) { |
| 891 | port->dev = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 892 | break; |
Yoichi Yuasa | eae936e | 2005-06-04 15:43:34 -0700 | [diff] [blame] | 893 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 894 | } |
| 895 | |
| 896 | if (i == 0 && retval < 0) { |
| 897 | uart_unregister_driver(&siu_uart_driver); |
| 898 | return retval; |
| 899 | } |
| 900 | |
| 901 | return 0; |
| 902 | } |
| 903 | |
Dmitry Torokhov | d39b6cf | 2006-03-22 00:07:53 -0800 | [diff] [blame] | 904 | static int __devexit siu_remove(struct platform_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 905 | { |
| 906 | struct uart_port *port; |
| 907 | int i; |
| 908 | |
| 909 | for (i = 0; i < siu_uart_driver.nr; i++) { |
| 910 | port = &siu_uart_ports[i]; |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 911 | if (port->dev == &dev->dev) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 912 | uart_remove_one_port(&siu_uart_driver, port); |
| 913 | port->dev = NULL; |
| 914 | } |
| 915 | } |
| 916 | |
| 917 | uart_unregister_driver(&siu_uart_driver); |
| 918 | |
| 919 | return 0; |
| 920 | } |
| 921 | |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 922 | static int siu_suspend(struct platform_device *dev, pm_message_t state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 923 | { |
| 924 | struct uart_port *port; |
| 925 | int i; |
| 926 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 927 | for (i = 0; i < siu_uart_driver.nr; i++) { |
| 928 | port = &siu_uart_ports[i]; |
| 929 | if ((port->type == PORT_VR41XX_SIU || |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 930 | port->type == PORT_VR41XX_DSIU) && port->dev == &dev->dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 931 | uart_suspend_port(&siu_uart_driver, port); |
| 932 | |
| 933 | } |
| 934 | |
| 935 | return 0; |
| 936 | } |
| 937 | |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 938 | static int siu_resume(struct platform_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 939 | { |
| 940 | struct uart_port *port; |
| 941 | int i; |
| 942 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 943 | for (i = 0; i < siu_uart_driver.nr; i++) { |
| 944 | port = &siu_uart_ports[i]; |
| 945 | if ((port->type == PORT_VR41XX_SIU || |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 946 | port->type == PORT_VR41XX_DSIU) && port->dev == &dev->dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 947 | uart_resume_port(&siu_uart_driver, port); |
| 948 | } |
| 949 | |
| 950 | return 0; |
| 951 | } |
| 952 | |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 953 | static struct platform_driver siu_device_driver = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 954 | .probe = siu_probe, |
Dmitry Torokhov | d39b6cf | 2006-03-22 00:07:53 -0800 | [diff] [blame] | 955 | .remove = __devexit_p(siu_remove), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 956 | .suspend = siu_suspend, |
| 957 | .resume = siu_resume, |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 958 | .driver = { |
| 959 | .name = "SIU", |
Dmitry Torokhov | d39b6cf | 2006-03-22 00:07:53 -0800 | [diff] [blame] | 960 | .owner = THIS_MODULE, |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 961 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 962 | }; |
| 963 | |
Dmitry Torokhov | d39b6cf | 2006-03-22 00:07:53 -0800 | [diff] [blame] | 964 | static int __init vr41xx_siu_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 965 | { |
Yoichi Yuasa | 8916494 | 2007-05-09 00:03:02 +0900 | [diff] [blame] | 966 | return platform_driver_register(&siu_device_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 967 | } |
| 968 | |
Dmitry Torokhov | d39b6cf | 2006-03-22 00:07:53 -0800 | [diff] [blame] | 969 | static void __exit vr41xx_siu_exit(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 970 | { |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 971 | platform_driver_unregister(&siu_device_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 972 | } |
| 973 | |
| 974 | module_init(vr41xx_siu_init); |
| 975 | module_exit(vr41xx_siu_exit); |
Kay Sievers | e169c13 | 2008-04-15 14:34:35 -0700 | [diff] [blame] | 976 | |
| 977 | MODULE_LICENSE("GPL"); |
| 978 | MODULE_ALIAS("platform:SIU"); |