Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | * Driver for SA11x0 serial ports |
| 3 | * |
| 4 | * Based on drivers/char/serial.c, by Linus Torvalds, Theodore Ts'o. |
| 5 | * |
| 6 | * Copyright (C) 2000 Deep Blue Solutions Ltd. |
| 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 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | |
| 23 | #if defined(CONFIG_SERIAL_SA1100_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) |
| 24 | #define SUPPORT_SYSRQ |
| 25 | #endif |
| 26 | |
| 27 | #include <linux/module.h> |
| 28 | #include <linux/ioport.h> |
| 29 | #include <linux/init.h> |
| 30 | #include <linux/console.h> |
| 31 | #include <linux/sysrq.h> |
Russell King | d052d1b | 2005-10-29 19:07:23 +0100 | [diff] [blame] | 32 | #include <linux/platform_device.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | #include <linux/tty.h> |
| 34 | #include <linux/tty_flip.h> |
| 35 | #include <linux/serial_core.h> |
| 36 | #include <linux/serial.h> |
Russell King | 9973022 | 2009-03-25 10:21:35 +0000 | [diff] [blame] | 37 | #include <linux/io.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | #include <asm/irq.h> |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 40 | #include <mach/hardware.h> |
Rob Herring | f314f33 | 2012-02-24 00:06:51 +0100 | [diff] [blame^] | 41 | #include <mach/irqs.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | #include <asm/mach/serial_sa1100.h> |
| 43 | |
| 44 | /* We've been assigned a range on the "Low-density serial ports" major */ |
| 45 | #define SERIAL_SA1100_MAJOR 204 |
| 46 | #define MINOR_START 5 |
| 47 | |
| 48 | #define NR_PORTS 3 |
| 49 | |
| 50 | #define SA1100_ISR_PASS_LIMIT 256 |
| 51 | |
| 52 | /* |
| 53 | * Convert from ignore_status_mask or read_status_mask to UTSR[01] |
| 54 | */ |
| 55 | #define SM_TO_UTSR0(x) ((x) & 0xff) |
| 56 | #define SM_TO_UTSR1(x) ((x) >> 8) |
| 57 | #define UTSR0_TO_SM(x) ((x)) |
| 58 | #define UTSR1_TO_SM(x) ((x) << 8) |
| 59 | |
| 60 | #define UART_GET_UTCR0(sport) __raw_readl((sport)->port.membase + UTCR0) |
| 61 | #define UART_GET_UTCR1(sport) __raw_readl((sport)->port.membase + UTCR1) |
| 62 | #define UART_GET_UTCR2(sport) __raw_readl((sport)->port.membase + UTCR2) |
| 63 | #define UART_GET_UTCR3(sport) __raw_readl((sport)->port.membase + UTCR3) |
| 64 | #define UART_GET_UTSR0(sport) __raw_readl((sport)->port.membase + UTSR0) |
| 65 | #define UART_GET_UTSR1(sport) __raw_readl((sport)->port.membase + UTSR1) |
| 66 | #define UART_GET_CHAR(sport) __raw_readl((sport)->port.membase + UTDR) |
| 67 | |
| 68 | #define UART_PUT_UTCR0(sport,v) __raw_writel((v),(sport)->port.membase + UTCR0) |
| 69 | #define UART_PUT_UTCR1(sport,v) __raw_writel((v),(sport)->port.membase + UTCR1) |
| 70 | #define UART_PUT_UTCR2(sport,v) __raw_writel((v),(sport)->port.membase + UTCR2) |
| 71 | #define UART_PUT_UTCR3(sport,v) __raw_writel((v),(sport)->port.membase + UTCR3) |
| 72 | #define UART_PUT_UTSR0(sport,v) __raw_writel((v),(sport)->port.membase + UTSR0) |
| 73 | #define UART_PUT_UTSR1(sport,v) __raw_writel((v),(sport)->port.membase + UTSR1) |
| 74 | #define UART_PUT_CHAR(sport,v) __raw_writel((v),(sport)->port.membase + UTDR) |
| 75 | |
| 76 | /* |
| 77 | * This is the size of our serial port register set. |
| 78 | */ |
| 79 | #define UART_PORT_SIZE 0x24 |
| 80 | |
| 81 | /* |
| 82 | * This determines how often we check the modem status signals |
| 83 | * for any change. They generally aren't connected to an IRQ |
| 84 | * so we have to poll them. We also check immediately before |
| 85 | * filling the TX fifo incase CTS has been dropped. |
| 86 | */ |
| 87 | #define MCTRL_TIMEOUT (250*HZ/1000) |
| 88 | |
| 89 | struct sa1100_port { |
| 90 | struct uart_port port; |
| 91 | struct timer_list timer; |
| 92 | unsigned int old_status; |
| 93 | }; |
| 94 | |
| 95 | /* |
| 96 | * Handle any change of modem status signal since we were last called. |
| 97 | */ |
| 98 | static void sa1100_mctrl_check(struct sa1100_port *sport) |
| 99 | { |
| 100 | unsigned int status, changed; |
| 101 | |
| 102 | status = sport->port.ops->get_mctrl(&sport->port); |
| 103 | changed = status ^ sport->old_status; |
| 104 | |
| 105 | if (changed == 0) |
| 106 | return; |
| 107 | |
| 108 | sport->old_status = status; |
| 109 | |
| 110 | if (changed & TIOCM_RI) |
| 111 | sport->port.icount.rng++; |
| 112 | if (changed & TIOCM_DSR) |
| 113 | sport->port.icount.dsr++; |
| 114 | if (changed & TIOCM_CAR) |
| 115 | uart_handle_dcd_change(&sport->port, status & TIOCM_CAR); |
| 116 | if (changed & TIOCM_CTS) |
| 117 | uart_handle_cts_change(&sport->port, status & TIOCM_CTS); |
| 118 | |
Alan Cox | bdc04e3 | 2009-09-19 13:13:31 -0700 | [diff] [blame] | 119 | wake_up_interruptible(&sport->port.state->port.delta_msr_wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | } |
| 121 | |
| 122 | /* |
| 123 | * This is our per-port timeout handler, for checking the |
| 124 | * modem status signals. |
| 125 | */ |
| 126 | static void sa1100_timeout(unsigned long data) |
| 127 | { |
| 128 | struct sa1100_port *sport = (struct sa1100_port *)data; |
| 129 | unsigned long flags; |
| 130 | |
Alan Cox | ebd2c8f | 2009-09-19 13:13:28 -0700 | [diff] [blame] | 131 | if (sport->port.state) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | spin_lock_irqsave(&sport->port.lock, flags); |
| 133 | sa1100_mctrl_check(sport); |
| 134 | spin_unlock_irqrestore(&sport->port.lock, flags); |
| 135 | |
| 136 | mod_timer(&sport->timer, jiffies + MCTRL_TIMEOUT); |
| 137 | } |
| 138 | } |
| 139 | |
| 140 | /* |
| 141 | * interrupts disabled on entry |
| 142 | */ |
Russell King | b129a8c | 2005-08-31 10:12:14 +0100 | [diff] [blame] | 143 | static void sa1100_stop_tx(struct uart_port *port) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | { |
| 145 | struct sa1100_port *sport = (struct sa1100_port *)port; |
| 146 | u32 utcr3; |
| 147 | |
| 148 | utcr3 = UART_GET_UTCR3(sport); |
| 149 | UART_PUT_UTCR3(sport, utcr3 & ~UTCR3_TIE); |
| 150 | sport->port.read_status_mask &= ~UTSR0_TO_SM(UTSR0_TFS); |
| 151 | } |
| 152 | |
| 153 | /* |
Florin Malita | 270c7a7 | 2005-11-12 22:09:22 +0000 | [diff] [blame] | 154 | * port locked and interrupts disabled |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | */ |
Russell King | b129a8c | 2005-08-31 10:12:14 +0100 | [diff] [blame] | 156 | static void sa1100_start_tx(struct uart_port *port) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | { |
| 158 | struct sa1100_port *sport = (struct sa1100_port *)port; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | u32 utcr3; |
| 160 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | utcr3 = UART_GET_UTCR3(sport); |
| 162 | sport->port.read_status_mask |= UTSR0_TO_SM(UTSR0_TFS); |
| 163 | UART_PUT_UTCR3(sport, utcr3 | UTCR3_TIE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | } |
| 165 | |
| 166 | /* |
| 167 | * Interrupts enabled |
| 168 | */ |
| 169 | static void sa1100_stop_rx(struct uart_port *port) |
| 170 | { |
| 171 | struct sa1100_port *sport = (struct sa1100_port *)port; |
| 172 | u32 utcr3; |
| 173 | |
| 174 | utcr3 = UART_GET_UTCR3(sport); |
| 175 | UART_PUT_UTCR3(sport, utcr3 & ~UTCR3_RIE); |
| 176 | } |
| 177 | |
| 178 | /* |
| 179 | * Set the modem control timer to fire immediately. |
| 180 | */ |
| 181 | static void sa1100_enable_ms(struct uart_port *port) |
| 182 | { |
| 183 | struct sa1100_port *sport = (struct sa1100_port *)port; |
| 184 | |
| 185 | mod_timer(&sport->timer, jiffies); |
| 186 | } |
| 187 | |
| 188 | static void |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 189 | sa1100_rx_chars(struct sa1100_port *sport) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | { |
Alan Cox | ebd2c8f | 2009-09-19 13:13:28 -0700 | [diff] [blame] | 191 | struct tty_struct *tty = sport->port.state->port.tty; |
Russell King | ff39bc7 | 2005-06-08 19:26:47 +0100 | [diff] [blame] | 192 | unsigned int status, ch, flg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | |
| 194 | status = UTSR1_TO_SM(UART_GET_UTSR1(sport)) | |
| 195 | UTSR0_TO_SM(UART_GET_UTSR0(sport)); |
| 196 | while (status & UTSR1_TO_SM(UTSR1_RNE)) { |
| 197 | ch = UART_GET_CHAR(sport); |
| 198 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 199 | sport->port.icount.rx++; |
| 200 | |
| 201 | flg = TTY_NORMAL; |
| 202 | |
| 203 | /* |
| 204 | * note that the error handling code is |
| 205 | * out of the main execution path |
| 206 | */ |
Russell King | 2a9604b | 2005-04-26 15:32:00 +0100 | [diff] [blame] | 207 | if (status & UTSR1_TO_SM(UTSR1_PRE | UTSR1_FRE | UTSR1_ROR)) { |
| 208 | if (status & UTSR1_TO_SM(UTSR1_PRE)) |
| 209 | sport->port.icount.parity++; |
| 210 | else if (status & UTSR1_TO_SM(UTSR1_FRE)) |
| 211 | sport->port.icount.frame++; |
| 212 | if (status & UTSR1_TO_SM(UTSR1_ROR)) |
| 213 | sport->port.icount.overrun++; |
| 214 | |
| 215 | status &= sport->port.read_status_mask; |
| 216 | |
| 217 | if (status & UTSR1_TO_SM(UTSR1_PRE)) |
| 218 | flg = TTY_PARITY; |
| 219 | else if (status & UTSR1_TO_SM(UTSR1_FRE)) |
| 220 | flg = TTY_FRAME; |
| 221 | |
| 222 | #ifdef SUPPORT_SYSRQ |
| 223 | sport->port.sysrq = 0; |
| 224 | #endif |
| 225 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 227 | if (uart_handle_sysrq_char(&sport->port, ch)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | goto ignore_char; |
| 229 | |
Russell King | 05ab301 | 2005-05-09 23:21:59 +0100 | [diff] [blame] | 230 | uart_insert_char(&sport->port, status, UTSR1_TO_SM(UTSR1_ROR), ch, flg); |
Russell King | 2a9604b | 2005-04-26 15:32:00 +0100 | [diff] [blame] | 231 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | ignore_char: |
| 233 | status = UTSR1_TO_SM(UART_GET_UTSR1(sport)) | |
| 234 | UTSR0_TO_SM(UART_GET_UTSR0(sport)); |
| 235 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | tty_flip_buffer_push(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 237 | } |
| 238 | |
| 239 | static void sa1100_tx_chars(struct sa1100_port *sport) |
| 240 | { |
Alan Cox | ebd2c8f | 2009-09-19 13:13:28 -0700 | [diff] [blame] | 241 | struct circ_buf *xmit = &sport->port.state->xmit; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 242 | |
| 243 | if (sport->port.x_char) { |
| 244 | UART_PUT_CHAR(sport, sport->port.x_char); |
| 245 | sport->port.icount.tx++; |
| 246 | sport->port.x_char = 0; |
| 247 | return; |
| 248 | } |
| 249 | |
| 250 | /* |
| 251 | * Check the modem control lines before |
| 252 | * transmitting anything. |
| 253 | */ |
| 254 | sa1100_mctrl_check(sport); |
| 255 | |
| 256 | if (uart_circ_empty(xmit) || uart_tx_stopped(&sport->port)) { |
Russell King | b129a8c | 2005-08-31 10:12:14 +0100 | [diff] [blame] | 257 | sa1100_stop_tx(&sport->port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 258 | return; |
| 259 | } |
| 260 | |
| 261 | /* |
| 262 | * Tried using FIFO (not checking TNF) for fifo fill: |
| 263 | * still had the '4 bytes repeated' problem. |
| 264 | */ |
| 265 | while (UART_GET_UTSR1(sport) & UTSR1_TNF) { |
| 266 | UART_PUT_CHAR(sport, xmit->buf[xmit->tail]); |
| 267 | xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); |
| 268 | sport->port.icount.tx++; |
| 269 | if (uart_circ_empty(xmit)) |
| 270 | break; |
| 271 | } |
| 272 | |
| 273 | if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) |
| 274 | uart_write_wakeup(&sport->port); |
| 275 | |
| 276 | if (uart_circ_empty(xmit)) |
Russell King | b129a8c | 2005-08-31 10:12:14 +0100 | [diff] [blame] | 277 | sa1100_stop_tx(&sport->port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 278 | } |
| 279 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 280 | static irqreturn_t sa1100_int(int irq, void *dev_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | { |
| 282 | struct sa1100_port *sport = dev_id; |
| 283 | unsigned int status, pass_counter = 0; |
| 284 | |
| 285 | spin_lock(&sport->port.lock); |
| 286 | status = UART_GET_UTSR0(sport); |
| 287 | status &= SM_TO_UTSR0(sport->port.read_status_mask) | ~UTSR0_TFS; |
| 288 | do { |
| 289 | if (status & (UTSR0_RFS | UTSR0_RID)) { |
| 290 | /* Clear the receiver idle bit, if set */ |
| 291 | if (status & UTSR0_RID) |
| 292 | UART_PUT_UTSR0(sport, UTSR0_RID); |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 293 | sa1100_rx_chars(sport); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 294 | } |
| 295 | |
| 296 | /* Clear the relevant break bits */ |
| 297 | if (status & (UTSR0_RBB | UTSR0_REB)) |
| 298 | UART_PUT_UTSR0(sport, status & (UTSR0_RBB | UTSR0_REB)); |
| 299 | |
| 300 | if (status & UTSR0_RBB) |
| 301 | sport->port.icount.brk++; |
| 302 | |
| 303 | if (status & UTSR0_REB) |
| 304 | uart_handle_break(&sport->port); |
| 305 | |
| 306 | if (status & UTSR0_TFS) |
| 307 | sa1100_tx_chars(sport); |
| 308 | if (pass_counter++ > SA1100_ISR_PASS_LIMIT) |
| 309 | break; |
| 310 | status = UART_GET_UTSR0(sport); |
| 311 | status &= SM_TO_UTSR0(sport->port.read_status_mask) | |
| 312 | ~UTSR0_TFS; |
| 313 | } while (status & (UTSR0_TFS | UTSR0_RFS | UTSR0_RID)); |
| 314 | spin_unlock(&sport->port.lock); |
| 315 | |
| 316 | return IRQ_HANDLED; |
| 317 | } |
| 318 | |
| 319 | /* |
| 320 | * Return TIOCSER_TEMT when transmitter is not busy. |
| 321 | */ |
| 322 | static unsigned int sa1100_tx_empty(struct uart_port *port) |
| 323 | { |
| 324 | struct sa1100_port *sport = (struct sa1100_port *)port; |
| 325 | |
| 326 | return UART_GET_UTSR1(sport) & UTSR1_TBY ? 0 : TIOCSER_TEMT; |
| 327 | } |
| 328 | |
| 329 | static unsigned int sa1100_get_mctrl(struct uart_port *port) |
| 330 | { |
| 331 | return TIOCM_CTS | TIOCM_DSR | TIOCM_CAR; |
| 332 | } |
| 333 | |
| 334 | static void sa1100_set_mctrl(struct uart_port *port, unsigned int mctrl) |
| 335 | { |
| 336 | } |
| 337 | |
| 338 | /* |
| 339 | * Interrupts always disabled. |
| 340 | */ |
| 341 | static void sa1100_break_ctl(struct uart_port *port, int break_state) |
| 342 | { |
| 343 | struct sa1100_port *sport = (struct sa1100_port *)port; |
| 344 | unsigned long flags; |
| 345 | unsigned int utcr3; |
| 346 | |
| 347 | spin_lock_irqsave(&sport->port.lock, flags); |
| 348 | utcr3 = UART_GET_UTCR3(sport); |
| 349 | if (break_state == -1) |
| 350 | utcr3 |= UTCR3_BRK; |
| 351 | else |
| 352 | utcr3 &= ~UTCR3_BRK; |
| 353 | UART_PUT_UTCR3(sport, utcr3); |
| 354 | spin_unlock_irqrestore(&sport->port.lock, flags); |
| 355 | } |
| 356 | |
| 357 | static int sa1100_startup(struct uart_port *port) |
| 358 | { |
| 359 | struct sa1100_port *sport = (struct sa1100_port *)port; |
| 360 | int retval; |
| 361 | |
| 362 | /* |
| 363 | * Allocate the IRQ |
| 364 | */ |
| 365 | retval = request_irq(sport->port.irq, sa1100_int, 0, |
| 366 | "sa11x0-uart", sport); |
| 367 | if (retval) |
| 368 | return retval; |
| 369 | |
| 370 | /* |
| 371 | * Finally, clear and enable interrupts |
| 372 | */ |
| 373 | UART_PUT_UTSR0(sport, -1); |
| 374 | UART_PUT_UTCR3(sport, UTCR3_RXE | UTCR3_TXE | UTCR3_RIE); |
| 375 | |
| 376 | /* |
| 377 | * Enable modem status interrupts |
| 378 | */ |
| 379 | spin_lock_irq(&sport->port.lock); |
| 380 | sa1100_enable_ms(&sport->port); |
| 381 | spin_unlock_irq(&sport->port.lock); |
| 382 | |
| 383 | return 0; |
| 384 | } |
| 385 | |
| 386 | static void sa1100_shutdown(struct uart_port *port) |
| 387 | { |
| 388 | struct sa1100_port *sport = (struct sa1100_port *)port; |
| 389 | |
| 390 | /* |
| 391 | * Stop our timer. |
| 392 | */ |
| 393 | del_timer_sync(&sport->timer); |
| 394 | |
| 395 | /* |
| 396 | * Free the interrupt |
| 397 | */ |
| 398 | free_irq(sport->port.irq, sport); |
| 399 | |
| 400 | /* |
| 401 | * Disable all interrupts, port and break condition. |
| 402 | */ |
| 403 | UART_PUT_UTCR3(sport, 0); |
| 404 | } |
| 405 | |
| 406 | static void |
Alan Cox | 606d099 | 2006-12-08 02:38:45 -0800 | [diff] [blame] | 407 | sa1100_set_termios(struct uart_port *port, struct ktermios *termios, |
| 408 | struct ktermios *old) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 409 | { |
| 410 | struct sa1100_port *sport = (struct sa1100_port *)port; |
| 411 | unsigned long flags; |
| 412 | unsigned int utcr0, old_utcr3, baud, quot; |
| 413 | unsigned int old_csize = old ? old->c_cflag & CSIZE : CS8; |
| 414 | |
| 415 | /* |
| 416 | * We only support CS7 and CS8. |
| 417 | */ |
| 418 | while ((termios->c_cflag & CSIZE) != CS7 && |
| 419 | (termios->c_cflag & CSIZE) != CS8) { |
| 420 | termios->c_cflag &= ~CSIZE; |
| 421 | termios->c_cflag |= old_csize; |
| 422 | old_csize = CS8; |
| 423 | } |
| 424 | |
| 425 | if ((termios->c_cflag & CSIZE) == CS8) |
| 426 | utcr0 = UTCR0_DSS; |
| 427 | else |
| 428 | utcr0 = 0; |
| 429 | |
| 430 | if (termios->c_cflag & CSTOPB) |
| 431 | utcr0 |= UTCR0_SBS; |
| 432 | if (termios->c_cflag & PARENB) { |
| 433 | utcr0 |= UTCR0_PE; |
| 434 | if (!(termios->c_cflag & PARODD)) |
| 435 | utcr0 |= UTCR0_OES; |
| 436 | } |
| 437 | |
| 438 | /* |
| 439 | * Ask the core to calculate the divisor for us. |
| 440 | */ |
| 441 | baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16); |
| 442 | quot = uart_get_divisor(port, baud); |
| 443 | |
| 444 | spin_lock_irqsave(&sport->port.lock, flags); |
| 445 | |
| 446 | sport->port.read_status_mask &= UTSR0_TO_SM(UTSR0_TFS); |
| 447 | sport->port.read_status_mask |= UTSR1_TO_SM(UTSR1_ROR); |
| 448 | if (termios->c_iflag & INPCK) |
| 449 | sport->port.read_status_mask |= |
| 450 | UTSR1_TO_SM(UTSR1_FRE | UTSR1_PRE); |
| 451 | if (termios->c_iflag & (BRKINT | PARMRK)) |
| 452 | sport->port.read_status_mask |= |
| 453 | UTSR0_TO_SM(UTSR0_RBB | UTSR0_REB); |
| 454 | |
| 455 | /* |
| 456 | * Characters to ignore |
| 457 | */ |
| 458 | sport->port.ignore_status_mask = 0; |
| 459 | if (termios->c_iflag & IGNPAR) |
| 460 | sport->port.ignore_status_mask |= |
| 461 | UTSR1_TO_SM(UTSR1_FRE | UTSR1_PRE); |
| 462 | if (termios->c_iflag & IGNBRK) { |
| 463 | sport->port.ignore_status_mask |= |
| 464 | UTSR0_TO_SM(UTSR0_RBB | UTSR0_REB); |
| 465 | /* |
| 466 | * If we're ignoring parity and break indicators, |
| 467 | * ignore overruns too (for real raw support). |
| 468 | */ |
| 469 | if (termios->c_iflag & IGNPAR) |
| 470 | sport->port.ignore_status_mask |= |
| 471 | UTSR1_TO_SM(UTSR1_ROR); |
| 472 | } |
| 473 | |
| 474 | del_timer_sync(&sport->timer); |
| 475 | |
| 476 | /* |
| 477 | * Update the per-port timeout. |
| 478 | */ |
| 479 | uart_update_timeout(port, termios->c_cflag, baud); |
| 480 | |
| 481 | /* |
| 482 | * disable interrupts and drain transmitter |
| 483 | */ |
| 484 | old_utcr3 = UART_GET_UTCR3(sport); |
| 485 | UART_PUT_UTCR3(sport, old_utcr3 & ~(UTCR3_RIE | UTCR3_TIE)); |
| 486 | |
| 487 | while (UART_GET_UTSR1(sport) & UTSR1_TBY) |
| 488 | barrier(); |
| 489 | |
| 490 | /* then, disable everything */ |
| 491 | UART_PUT_UTCR3(sport, 0); |
| 492 | |
| 493 | /* set the parity, stop bits and data size */ |
| 494 | UART_PUT_UTCR0(sport, utcr0); |
| 495 | |
| 496 | /* set the baud rate */ |
| 497 | quot -= 1; |
| 498 | UART_PUT_UTCR1(sport, ((quot & 0xf00) >> 8)); |
| 499 | UART_PUT_UTCR2(sport, (quot & 0xff)); |
| 500 | |
| 501 | UART_PUT_UTSR0(sport, -1); |
| 502 | |
| 503 | UART_PUT_UTCR3(sport, old_utcr3); |
| 504 | |
| 505 | if (UART_ENABLE_MS(&sport->port, termios->c_cflag)) |
| 506 | sa1100_enable_ms(&sport->port); |
| 507 | |
| 508 | spin_unlock_irqrestore(&sport->port.lock, flags); |
| 509 | } |
| 510 | |
| 511 | static const char *sa1100_type(struct uart_port *port) |
| 512 | { |
| 513 | struct sa1100_port *sport = (struct sa1100_port *)port; |
| 514 | |
| 515 | return sport->port.type == PORT_SA1100 ? "SA1100" : NULL; |
| 516 | } |
| 517 | |
| 518 | /* |
| 519 | * Release the memory region(s) being used by 'port'. |
| 520 | */ |
| 521 | static void sa1100_release_port(struct uart_port *port) |
| 522 | { |
| 523 | struct sa1100_port *sport = (struct sa1100_port *)port; |
| 524 | |
| 525 | release_mem_region(sport->port.mapbase, UART_PORT_SIZE); |
| 526 | } |
| 527 | |
| 528 | /* |
| 529 | * Request the memory region(s) being used by 'port'. |
| 530 | */ |
| 531 | static int sa1100_request_port(struct uart_port *port) |
| 532 | { |
| 533 | struct sa1100_port *sport = (struct sa1100_port *)port; |
| 534 | |
| 535 | return request_mem_region(sport->port.mapbase, UART_PORT_SIZE, |
| 536 | "sa11x0-uart") != NULL ? 0 : -EBUSY; |
| 537 | } |
| 538 | |
| 539 | /* |
| 540 | * Configure/autoconfigure the port. |
| 541 | */ |
| 542 | static void sa1100_config_port(struct uart_port *port, int flags) |
| 543 | { |
| 544 | struct sa1100_port *sport = (struct sa1100_port *)port; |
| 545 | |
| 546 | if (flags & UART_CONFIG_TYPE && |
| 547 | sa1100_request_port(&sport->port) == 0) |
| 548 | sport->port.type = PORT_SA1100; |
| 549 | } |
| 550 | |
| 551 | /* |
| 552 | * Verify the new serial_struct (for TIOCSSERIAL). |
| 553 | * The only change we allow are to the flags and type, and |
| 554 | * even then only between PORT_SA1100 and PORT_UNKNOWN |
| 555 | */ |
| 556 | static int |
| 557 | sa1100_verify_port(struct uart_port *port, struct serial_struct *ser) |
| 558 | { |
| 559 | struct sa1100_port *sport = (struct sa1100_port *)port; |
| 560 | int ret = 0; |
| 561 | |
| 562 | if (ser->type != PORT_UNKNOWN && ser->type != PORT_SA1100) |
| 563 | ret = -EINVAL; |
| 564 | if (sport->port.irq != ser->irq) |
| 565 | ret = -EINVAL; |
| 566 | if (ser->io_type != SERIAL_IO_MEM) |
| 567 | ret = -EINVAL; |
| 568 | if (sport->port.uartclk / 16 != ser->baud_base) |
| 569 | ret = -EINVAL; |
| 570 | if ((void *)sport->port.mapbase != ser->iomem_base) |
| 571 | ret = -EINVAL; |
| 572 | if (sport->port.iobase != ser->port) |
| 573 | ret = -EINVAL; |
| 574 | if (ser->hub6 != 0) |
| 575 | ret = -EINVAL; |
| 576 | return ret; |
| 577 | } |
| 578 | |
| 579 | static struct uart_ops sa1100_pops = { |
| 580 | .tx_empty = sa1100_tx_empty, |
| 581 | .set_mctrl = sa1100_set_mctrl, |
| 582 | .get_mctrl = sa1100_get_mctrl, |
| 583 | .stop_tx = sa1100_stop_tx, |
| 584 | .start_tx = sa1100_start_tx, |
| 585 | .stop_rx = sa1100_stop_rx, |
| 586 | .enable_ms = sa1100_enable_ms, |
| 587 | .break_ctl = sa1100_break_ctl, |
| 588 | .startup = sa1100_startup, |
| 589 | .shutdown = sa1100_shutdown, |
| 590 | .set_termios = sa1100_set_termios, |
| 591 | .type = sa1100_type, |
| 592 | .release_port = sa1100_release_port, |
| 593 | .request_port = sa1100_request_port, |
| 594 | .config_port = sa1100_config_port, |
| 595 | .verify_port = sa1100_verify_port, |
| 596 | }; |
| 597 | |
| 598 | static struct sa1100_port sa1100_ports[NR_PORTS]; |
| 599 | |
| 600 | /* |
| 601 | * Setup the SA1100 serial ports. Note that we don't include the IrDA |
| 602 | * port here since we have our own SIR/FIR driver (see drivers/net/irda) |
| 603 | * |
| 604 | * Note also that we support "console=ttySAx" where "x" is either 0 or 1. |
| 605 | * Which serial port this ends up being depends on the machine you're |
| 606 | * running this kernel on. I'm not convinced that this is a good idea, |
| 607 | * but that's the way it traditionally works. |
| 608 | * |
| 609 | * Note that NanoEngine UART3 becomes UART2, and UART2 is no longer |
| 610 | * used here. |
| 611 | */ |
| 612 | static void __init sa1100_init_ports(void) |
| 613 | { |
| 614 | static int first = 1; |
| 615 | int i; |
| 616 | |
| 617 | if (!first) |
| 618 | return; |
| 619 | first = 0; |
| 620 | |
| 621 | for (i = 0; i < NR_PORTS; i++) { |
| 622 | sa1100_ports[i].port.uartclk = 3686400; |
| 623 | sa1100_ports[i].port.ops = &sa1100_pops; |
| 624 | sa1100_ports[i].port.fifosize = 8; |
| 625 | sa1100_ports[i].port.line = i; |
Russell King | 9b4a161 | 2006-02-05 10:48:10 +0000 | [diff] [blame] | 626 | sa1100_ports[i].port.iotype = UPIO_MEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 627 | init_timer(&sa1100_ports[i].timer); |
| 628 | sa1100_ports[i].timer.function = sa1100_timeout; |
| 629 | sa1100_ports[i].timer.data = (unsigned long)&sa1100_ports[i]; |
| 630 | } |
| 631 | |
| 632 | /* |
| 633 | * make transmit lines outputs, so that when the port |
| 634 | * is closed, the output is in the MARK state. |
| 635 | */ |
| 636 | PPDR |= PPC_TXD1 | PPC_TXD3; |
| 637 | PPSR |= PPC_TXD1 | PPC_TXD3; |
| 638 | } |
| 639 | |
Russell King | 3f944ab | 2009-09-27 17:31:27 +0100 | [diff] [blame] | 640 | void __devinit sa1100_register_uart_fns(struct sa1100_port_fns *fns) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 641 | { |
| 642 | if (fns->get_mctrl) |
| 643 | sa1100_pops.get_mctrl = fns->get_mctrl; |
| 644 | if (fns->set_mctrl) |
| 645 | sa1100_pops.set_mctrl = fns->set_mctrl; |
| 646 | |
| 647 | sa1100_pops.pm = fns->pm; |
| 648 | sa1100_pops.set_wake = fns->set_wake; |
| 649 | } |
| 650 | |
| 651 | void __init sa1100_register_uart(int idx, int port) |
| 652 | { |
| 653 | if (idx >= NR_PORTS) { |
Harvey Harrison | 71cc2c2 | 2008-04-30 00:55:10 -0700 | [diff] [blame] | 654 | printk(KERN_ERR "%s: bad index number %d\n", __func__, idx); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 655 | return; |
| 656 | } |
| 657 | |
| 658 | switch (port) { |
| 659 | case 1: |
| 660 | sa1100_ports[idx].port.membase = (void __iomem *)&Ser1UTCR0; |
| 661 | sa1100_ports[idx].port.mapbase = _Ser1UTCR0; |
| 662 | sa1100_ports[idx].port.irq = IRQ_Ser1UART; |
Russell King | ce8337c | 2006-01-21 19:28:15 +0000 | [diff] [blame] | 663 | sa1100_ports[idx].port.flags = UPF_BOOT_AUTOCONF; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 664 | break; |
| 665 | |
| 666 | case 2: |
| 667 | sa1100_ports[idx].port.membase = (void __iomem *)&Ser2UTCR0; |
| 668 | sa1100_ports[idx].port.mapbase = _Ser2UTCR0; |
| 669 | sa1100_ports[idx].port.irq = IRQ_Ser2ICP; |
Russell King | ce8337c | 2006-01-21 19:28:15 +0000 | [diff] [blame] | 670 | sa1100_ports[idx].port.flags = UPF_BOOT_AUTOCONF; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 671 | break; |
| 672 | |
| 673 | case 3: |
| 674 | sa1100_ports[idx].port.membase = (void __iomem *)&Ser3UTCR0; |
| 675 | sa1100_ports[idx].port.mapbase = _Ser3UTCR0; |
| 676 | sa1100_ports[idx].port.irq = IRQ_Ser3UART; |
Russell King | ce8337c | 2006-01-21 19:28:15 +0000 | [diff] [blame] | 677 | sa1100_ports[idx].port.flags = UPF_BOOT_AUTOCONF; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 678 | break; |
| 679 | |
| 680 | default: |
Harvey Harrison | 71cc2c2 | 2008-04-30 00:55:10 -0700 | [diff] [blame] | 681 | printk(KERN_ERR "%s: bad port number %d\n", __func__, port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 682 | } |
| 683 | } |
| 684 | |
| 685 | |
| 686 | #ifdef CONFIG_SERIAL_SA1100_CONSOLE |
Russell King | d358788 | 2006-03-20 20:00:09 +0000 | [diff] [blame] | 687 | static void sa1100_console_putchar(struct uart_port *port, int ch) |
| 688 | { |
| 689 | struct sa1100_port *sport = (struct sa1100_port *)port; |
| 690 | |
| 691 | while (!(UART_GET_UTSR1(sport) & UTSR1_TNF)) |
| 692 | barrier(); |
| 693 | UART_PUT_CHAR(sport, ch); |
| 694 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 695 | |
| 696 | /* |
| 697 | * Interrupts are disabled on entering |
| 698 | */ |
| 699 | static void |
| 700 | sa1100_console_write(struct console *co, const char *s, unsigned int count) |
| 701 | { |
| 702 | struct sa1100_port *sport = &sa1100_ports[co->index]; |
Russell King | d358788 | 2006-03-20 20:00:09 +0000 | [diff] [blame] | 703 | unsigned int old_utcr3, status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 704 | |
| 705 | /* |
| 706 | * First, save UTCR3 and then disable interrupts |
| 707 | */ |
| 708 | old_utcr3 = UART_GET_UTCR3(sport); |
| 709 | UART_PUT_UTCR3(sport, (old_utcr3 & ~(UTCR3_RIE | UTCR3_TIE)) | |
| 710 | UTCR3_TXE); |
| 711 | |
Russell King | d358788 | 2006-03-20 20:00:09 +0000 | [diff] [blame] | 712 | uart_console_write(&sport->port, s, count, sa1100_console_putchar); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 713 | |
| 714 | /* |
| 715 | * Finally, wait for transmitter to become empty |
| 716 | * and restore UTCR3 |
| 717 | */ |
| 718 | do { |
| 719 | status = UART_GET_UTSR1(sport); |
| 720 | } while (status & UTSR1_TBY); |
| 721 | UART_PUT_UTCR3(sport, old_utcr3); |
| 722 | } |
| 723 | |
| 724 | /* |
| 725 | * If the port was already initialised (eg, by a boot loader), |
| 726 | * try to determine the current setup. |
| 727 | */ |
| 728 | static void __init |
| 729 | sa1100_console_get_options(struct sa1100_port *sport, int *baud, |
| 730 | int *parity, int *bits) |
| 731 | { |
| 732 | unsigned int utcr3; |
| 733 | |
| 734 | utcr3 = UART_GET_UTCR3(sport) & (UTCR3_RXE | UTCR3_TXE); |
| 735 | if (utcr3 == (UTCR3_RXE | UTCR3_TXE)) { |
| 736 | /* ok, the port was enabled */ |
| 737 | unsigned int utcr0, quot; |
| 738 | |
| 739 | utcr0 = UART_GET_UTCR0(sport); |
| 740 | |
| 741 | *parity = 'n'; |
| 742 | if (utcr0 & UTCR0_PE) { |
| 743 | if (utcr0 & UTCR0_OES) |
| 744 | *parity = 'e'; |
| 745 | else |
| 746 | *parity = 'o'; |
| 747 | } |
| 748 | |
| 749 | if (utcr0 & UTCR0_DSS) |
| 750 | *bits = 8; |
| 751 | else |
| 752 | *bits = 7; |
| 753 | |
| 754 | quot = UART_GET_UTCR2(sport) | UART_GET_UTCR1(sport) << 8; |
| 755 | quot &= 0xfff; |
| 756 | *baud = sport->port.uartclk / (16 * (quot + 1)); |
| 757 | } |
| 758 | } |
| 759 | |
| 760 | static int __init |
| 761 | sa1100_console_setup(struct console *co, char *options) |
| 762 | { |
| 763 | struct sa1100_port *sport; |
| 764 | int baud = 9600; |
| 765 | int bits = 8; |
| 766 | int parity = 'n'; |
| 767 | int flow = 'n'; |
| 768 | |
| 769 | /* |
| 770 | * Check whether an invalid uart number has been specified, and |
| 771 | * if so, search for the first available port that does have |
| 772 | * console support. |
| 773 | */ |
| 774 | if (co->index == -1 || co->index >= NR_PORTS) |
| 775 | co->index = 0; |
| 776 | sport = &sa1100_ports[co->index]; |
| 777 | |
| 778 | if (options) |
| 779 | uart_parse_options(options, &baud, &parity, &bits, &flow); |
| 780 | else |
| 781 | sa1100_console_get_options(sport, &baud, &parity, &bits); |
| 782 | |
| 783 | return uart_set_options(&sport->port, co, baud, parity, bits, flow); |
| 784 | } |
| 785 | |
Vincent Sanders | 2d93486 | 2005-09-14 22:36:03 +0100 | [diff] [blame] | 786 | static struct uart_driver sa1100_reg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 787 | static struct console sa1100_console = { |
| 788 | .name = "ttySA", |
| 789 | .write = sa1100_console_write, |
| 790 | .device = uart_console_device, |
| 791 | .setup = sa1100_console_setup, |
| 792 | .flags = CON_PRINTBUFFER, |
| 793 | .index = -1, |
| 794 | .data = &sa1100_reg, |
| 795 | }; |
| 796 | |
| 797 | static int __init sa1100_rs_console_init(void) |
| 798 | { |
| 799 | sa1100_init_ports(); |
| 800 | register_console(&sa1100_console); |
| 801 | return 0; |
| 802 | } |
| 803 | console_initcall(sa1100_rs_console_init); |
| 804 | |
| 805 | #define SA1100_CONSOLE &sa1100_console |
| 806 | #else |
| 807 | #define SA1100_CONSOLE NULL |
| 808 | #endif |
| 809 | |
| 810 | static struct uart_driver sa1100_reg = { |
| 811 | .owner = THIS_MODULE, |
| 812 | .driver_name = "ttySA", |
| 813 | .dev_name = "ttySA", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 814 | .major = SERIAL_SA1100_MAJOR, |
| 815 | .minor = MINOR_START, |
| 816 | .nr = NR_PORTS, |
| 817 | .cons = SA1100_CONSOLE, |
| 818 | }; |
| 819 | |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 820 | static int sa1100_serial_suspend(struct platform_device *dev, pm_message_t state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 821 | { |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 822 | struct sa1100_port *sport = platform_get_drvdata(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 823 | |
Russell King | 9480e30 | 2005-10-28 09:52:56 -0700 | [diff] [blame] | 824 | if (sport) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 825 | uart_suspend_port(&sa1100_reg, &sport->port); |
| 826 | |
| 827 | return 0; |
| 828 | } |
| 829 | |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 830 | static int sa1100_serial_resume(struct platform_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 831 | { |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 832 | struct sa1100_port *sport = platform_get_drvdata(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 833 | |
Russell King | 9480e30 | 2005-10-28 09:52:56 -0700 | [diff] [blame] | 834 | if (sport) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 835 | uart_resume_port(&sa1100_reg, &sport->port); |
| 836 | |
| 837 | return 0; |
| 838 | } |
| 839 | |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 840 | static int sa1100_serial_probe(struct platform_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 841 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 842 | struct resource *res = dev->resource; |
| 843 | int i; |
| 844 | |
| 845 | for (i = 0; i < dev->num_resources; i++, res++) |
| 846 | if (res->flags & IORESOURCE_MEM) |
| 847 | break; |
| 848 | |
| 849 | if (i < dev->num_resources) { |
| 850 | for (i = 0; i < NR_PORTS; i++) { |
| 851 | if (sa1100_ports[i].port.mapbase != res->start) |
| 852 | continue; |
| 853 | |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 854 | sa1100_ports[i].port.dev = &dev->dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 855 | uart_add_one_port(&sa1100_reg, &sa1100_ports[i].port); |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 856 | platform_set_drvdata(dev, &sa1100_ports[i]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 857 | break; |
| 858 | } |
| 859 | } |
| 860 | |
| 861 | return 0; |
| 862 | } |
| 863 | |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 864 | static int sa1100_serial_remove(struct platform_device *pdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 865 | { |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 866 | struct sa1100_port *sport = platform_get_drvdata(pdev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 867 | |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 868 | platform_set_drvdata(pdev, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 869 | |
| 870 | if (sport) |
| 871 | uart_remove_one_port(&sa1100_reg, &sport->port); |
| 872 | |
| 873 | return 0; |
| 874 | } |
| 875 | |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 876 | static struct platform_driver sa11x0_serial_driver = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 877 | .probe = sa1100_serial_probe, |
| 878 | .remove = sa1100_serial_remove, |
| 879 | .suspend = sa1100_serial_suspend, |
| 880 | .resume = sa1100_serial_resume, |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 881 | .driver = { |
| 882 | .name = "sa11x0-uart", |
Kay Sievers | e169c13 | 2008-04-15 14:34:35 -0700 | [diff] [blame] | 883 | .owner = THIS_MODULE, |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 884 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 885 | }; |
| 886 | |
| 887 | static int __init sa1100_serial_init(void) |
| 888 | { |
| 889 | int ret; |
| 890 | |
Adrian Bunk | d87a6d9 | 2008-07-16 21:53:31 +0100 | [diff] [blame] | 891 | printk(KERN_INFO "Serial: SA11x0 driver\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 892 | |
| 893 | sa1100_init_ports(); |
| 894 | |
| 895 | ret = uart_register_driver(&sa1100_reg); |
| 896 | if (ret == 0) { |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 897 | ret = platform_driver_register(&sa11x0_serial_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 898 | if (ret) |
| 899 | uart_unregister_driver(&sa1100_reg); |
| 900 | } |
| 901 | return ret; |
| 902 | } |
| 903 | |
| 904 | static void __exit sa1100_serial_exit(void) |
| 905 | { |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 906 | platform_driver_unregister(&sa11x0_serial_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 907 | uart_unregister_driver(&sa1100_reg); |
| 908 | } |
| 909 | |
| 910 | module_init(sa1100_serial_init); |
| 911 | module_exit(sa1100_serial_exit); |
| 912 | |
| 913 | MODULE_AUTHOR("Deep Blue Solutions Ltd"); |
Adrian Bunk | d87a6d9 | 2008-07-16 21:53:31 +0100 | [diff] [blame] | 914 | MODULE_DESCRIPTION("SA1100 generic serial port driver"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 915 | MODULE_LICENSE("GPL"); |
| 916 | MODULE_ALIAS_CHARDEV_MAJOR(SERIAL_SA1100_MAJOR); |
Kay Sievers | e169c13 | 2008-04-15 14:34:35 -0700 | [diff] [blame] | 917 | MODULE_ALIAS("platform:sa11x0-uart"); |