Jovi Zhang | 99edb3d | 2011-03-30 05:30:41 -0400 | [diff] [blame] | 1 | /* |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 2 | * Driver core for Samsung SoC onboard UARTs. |
| 3 | * |
Ben Dooks | ccae941 | 2009-11-13 22:54:14 +0000 | [diff] [blame] | 4 | * Ben Dooks, Copyright (c) 2003-2008 Simtec Electronics |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 5 | * http://armlinux.simtec.co.uk/ |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License version 2 as |
| 9 | * published by the Free Software Foundation. |
| 10 | */ |
| 11 | |
| 12 | /* Hote on 2410 error handling |
| 13 | * |
| 14 | * The s3c2410 manual has a love/hate affair with the contents of the |
| 15 | * UERSTAT register in the UART blocks, and keeps marking some of the |
| 16 | * error bits as reserved. Having checked with the s3c2410x01, |
| 17 | * it copes with BREAKs properly, so I am happy to ignore the RESERVED |
| 18 | * feature from the latter versions of the manual. |
| 19 | * |
| 20 | * If it becomes aparrent that latter versions of the 2410 remove these |
| 21 | * bits, then action will have to be taken to differentiate the versions |
| 22 | * and change the policy on BREAK |
| 23 | * |
| 24 | * BJD, 04-Nov-2004 |
| 25 | */ |
| 26 | |
| 27 | #if defined(CONFIG_SERIAL_SAMSUNG_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) |
| 28 | #define SUPPORT_SYSRQ |
| 29 | #endif |
| 30 | |
| 31 | #include <linux/module.h> |
| 32 | #include <linux/ioport.h> |
| 33 | #include <linux/io.h> |
| 34 | #include <linux/platform_device.h> |
| 35 | #include <linux/init.h> |
| 36 | #include <linux/sysrq.h> |
| 37 | #include <linux/console.h> |
| 38 | #include <linux/tty.h> |
| 39 | #include <linux/tty_flip.h> |
| 40 | #include <linux/serial_core.h> |
| 41 | #include <linux/serial.h> |
| 42 | #include <linux/delay.h> |
| 43 | #include <linux/clk.h> |
Ben Dooks | 3055547 | 2008-10-21 14:06:36 +0100 | [diff] [blame] | 44 | #include <linux/cpufreq.h> |
Thomas Abraham | 26c919e | 2011-11-06 22:10:44 +0530 | [diff] [blame] | 45 | #include <linux/of.h> |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 46 | |
| 47 | #include <asm/irq.h> |
| 48 | |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 49 | #include <mach/hardware.h> |
Ben Dooks | b690ace | 2008-10-21 14:07:03 +0100 | [diff] [blame] | 50 | #include <mach/map.h> |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 51 | |
Ben Dooks | a2b7ba9 | 2008-10-07 22:26:09 +0100 | [diff] [blame] | 52 | #include <plat/regs-serial.h> |
Thomas Abraham | 5f5a7a5 | 2011-10-24 11:47:46 +0200 | [diff] [blame] | 53 | #include <plat/clock.h> |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 54 | |
| 55 | #include "samsung.h" |
| 56 | |
| 57 | /* UART name and device definitions */ |
| 58 | |
| 59 | #define S3C24XX_SERIAL_NAME "ttySAC" |
| 60 | #define S3C24XX_SERIAL_MAJOR 204 |
| 61 | #define S3C24XX_SERIAL_MINOR 64 |
| 62 | |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 63 | /* macros to change one thing to another */ |
| 64 | |
| 65 | #define tx_enabled(port) ((port)->unused[0]) |
| 66 | #define rx_enabled(port) ((port)->unused[1]) |
| 67 | |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 68 | /* flag to ignore all characters coming in */ |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 69 | #define RXSTAT_DUMMY_READ (0x10000000) |
| 70 | |
| 71 | static inline struct s3c24xx_uart_port *to_ourport(struct uart_port *port) |
| 72 | { |
| 73 | return container_of(port, struct s3c24xx_uart_port, port); |
| 74 | } |
| 75 | |
| 76 | /* translate a port to the device name */ |
| 77 | |
| 78 | static inline const char *s3c24xx_serial_portname(struct uart_port *port) |
| 79 | { |
| 80 | return to_platform_device(port->dev)->name; |
| 81 | } |
| 82 | |
| 83 | static int s3c24xx_serial_txempty_nofifo(struct uart_port *port) |
| 84 | { |
| 85 | return (rd_regl(port, S3C2410_UTRSTAT) & S3C2410_UTRSTAT_TXE); |
| 86 | } |
| 87 | |
Thomas Abraham | 88bb4ea | 2011-08-10 15:51:19 +0530 | [diff] [blame] | 88 | /* |
| 89 | * s3c64xx and later SoC's include the interrupt mask and status registers in |
| 90 | * the controller itself, unlike the s3c24xx SoC's which have these registers |
| 91 | * in the interrupt controller. Check if the port type is s3c64xx or higher. |
| 92 | */ |
| 93 | static int s3c24xx_serial_has_interrupt_mask(struct uart_port *port) |
| 94 | { |
| 95 | return to_ourport(port)->info->type == PORT_S3C6400; |
| 96 | } |
| 97 | |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 98 | static void s3c24xx_serial_rx_enable(struct uart_port *port) |
| 99 | { |
| 100 | unsigned long flags; |
| 101 | unsigned int ucon, ufcon; |
| 102 | int count = 10000; |
| 103 | |
| 104 | spin_lock_irqsave(&port->lock, flags); |
| 105 | |
| 106 | while (--count && !s3c24xx_serial_txempty_nofifo(port)) |
| 107 | udelay(100); |
| 108 | |
| 109 | ufcon = rd_regl(port, S3C2410_UFCON); |
| 110 | ufcon |= S3C2410_UFCON_RESETRX; |
| 111 | wr_regl(port, S3C2410_UFCON, ufcon); |
| 112 | |
| 113 | ucon = rd_regl(port, S3C2410_UCON); |
| 114 | ucon |= S3C2410_UCON_RXIRQMODE; |
| 115 | wr_regl(port, S3C2410_UCON, ucon); |
| 116 | |
| 117 | rx_enabled(port) = 1; |
| 118 | spin_unlock_irqrestore(&port->lock, flags); |
| 119 | } |
| 120 | |
| 121 | static void s3c24xx_serial_rx_disable(struct uart_port *port) |
| 122 | { |
| 123 | unsigned long flags; |
| 124 | unsigned int ucon; |
| 125 | |
| 126 | spin_lock_irqsave(&port->lock, flags); |
| 127 | |
| 128 | ucon = rd_regl(port, S3C2410_UCON); |
| 129 | ucon &= ~S3C2410_UCON_RXIRQMODE; |
| 130 | wr_regl(port, S3C2410_UCON, ucon); |
| 131 | |
| 132 | rx_enabled(port) = 0; |
| 133 | spin_unlock_irqrestore(&port->lock, flags); |
| 134 | } |
| 135 | |
| 136 | static void s3c24xx_serial_stop_tx(struct uart_port *port) |
| 137 | { |
Ben Dooks | b73c289 | 2008-10-21 14:07:04 +0100 | [diff] [blame] | 138 | struct s3c24xx_uart_port *ourport = to_ourport(port); |
| 139 | |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 140 | if (tx_enabled(port)) { |
Thomas Abraham | 88bb4ea | 2011-08-10 15:51:19 +0530 | [diff] [blame] | 141 | if (s3c24xx_serial_has_interrupt_mask(port)) |
| 142 | __set_bit(S3C64XX_UINTM_TXD, |
| 143 | portaddrl(port, S3C64XX_UINTM)); |
| 144 | else |
| 145 | disable_irq_nosync(ourport->tx_irq); |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 146 | tx_enabled(port) = 0; |
| 147 | if (port->flags & UPF_CONS_FLOW) |
| 148 | s3c24xx_serial_rx_enable(port); |
| 149 | } |
| 150 | } |
| 151 | |
| 152 | static void s3c24xx_serial_start_tx(struct uart_port *port) |
| 153 | { |
Ben Dooks | b73c289 | 2008-10-21 14:07:04 +0100 | [diff] [blame] | 154 | struct s3c24xx_uart_port *ourport = to_ourport(port); |
| 155 | |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 156 | if (!tx_enabled(port)) { |
| 157 | if (port->flags & UPF_CONS_FLOW) |
| 158 | s3c24xx_serial_rx_disable(port); |
| 159 | |
Thomas Abraham | 88bb4ea | 2011-08-10 15:51:19 +0530 | [diff] [blame] | 160 | if (s3c24xx_serial_has_interrupt_mask(port)) |
| 161 | __clear_bit(S3C64XX_UINTM_TXD, |
| 162 | portaddrl(port, S3C64XX_UINTM)); |
| 163 | else |
| 164 | enable_irq(ourport->tx_irq); |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 165 | tx_enabled(port) = 1; |
| 166 | } |
| 167 | } |
| 168 | |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 169 | static void s3c24xx_serial_stop_rx(struct uart_port *port) |
| 170 | { |
Ben Dooks | b73c289 | 2008-10-21 14:07:04 +0100 | [diff] [blame] | 171 | struct s3c24xx_uart_port *ourport = to_ourport(port); |
| 172 | |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 173 | if (rx_enabled(port)) { |
| 174 | dbg("s3c24xx_serial_stop_rx: port=%p\n", port); |
Thomas Abraham | 88bb4ea | 2011-08-10 15:51:19 +0530 | [diff] [blame] | 175 | if (s3c24xx_serial_has_interrupt_mask(port)) |
| 176 | __set_bit(S3C64XX_UINTM_RXD, |
| 177 | portaddrl(port, S3C64XX_UINTM)); |
| 178 | else |
| 179 | disable_irq_nosync(ourport->rx_irq); |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 180 | rx_enabled(port) = 0; |
| 181 | } |
| 182 | } |
| 183 | |
| 184 | static void s3c24xx_serial_enable_ms(struct uart_port *port) |
| 185 | { |
| 186 | } |
| 187 | |
| 188 | static inline struct s3c24xx_uart_info *s3c24xx_port_to_info(struct uart_port *port) |
| 189 | { |
| 190 | return to_ourport(port)->info; |
| 191 | } |
| 192 | |
| 193 | static inline struct s3c2410_uartcfg *s3c24xx_port_to_cfg(struct uart_port *port) |
| 194 | { |
Thomas Abraham | 4d84e97 | 2011-10-24 11:47:25 +0200 | [diff] [blame] | 195 | struct s3c24xx_uart_port *ourport; |
| 196 | |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 197 | if (port->dev == NULL) |
| 198 | return NULL; |
| 199 | |
Thomas Abraham | 4d84e97 | 2011-10-24 11:47:25 +0200 | [diff] [blame] | 200 | ourport = container_of(port, struct s3c24xx_uart_port, port); |
| 201 | return ourport->cfg; |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 202 | } |
| 203 | |
| 204 | static int s3c24xx_serial_rx_fifocnt(struct s3c24xx_uart_port *ourport, |
| 205 | unsigned long ufstat) |
| 206 | { |
| 207 | struct s3c24xx_uart_info *info = ourport->info; |
| 208 | |
| 209 | if (ufstat & info->rx_fifofull) |
Thomas Abraham | da12150 | 2011-11-02 19:23:25 +0900 | [diff] [blame] | 210 | return ourport->port.fifosize; |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 211 | |
| 212 | return (ufstat & info->rx_fifomask) >> info->rx_fifoshift; |
| 213 | } |
| 214 | |
| 215 | |
| 216 | /* ? - where has parity gone?? */ |
| 217 | #define S3C2410_UERSTAT_PARITY (0x1000) |
| 218 | |
| 219 | static irqreturn_t |
| 220 | s3c24xx_serial_rx_chars(int irq, void *dev_id) |
| 221 | { |
| 222 | struct s3c24xx_uart_port *ourport = dev_id; |
| 223 | struct uart_port *port = &ourport->port; |
Alan Cox | ebd2c8f | 2009-09-19 13:13:28 -0700 | [diff] [blame] | 224 | struct tty_struct *tty = port->state->port.tty; |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 225 | unsigned int ufcon, ch, flag, ufstat, uerstat; |
| 226 | int max_count = 64; |
| 227 | |
| 228 | while (max_count-- > 0) { |
| 229 | ufcon = rd_regl(port, S3C2410_UFCON); |
| 230 | ufstat = rd_regl(port, S3C2410_UFSTAT); |
| 231 | |
| 232 | if (s3c24xx_serial_rx_fifocnt(ourport, ufstat) == 0) |
| 233 | break; |
| 234 | |
| 235 | uerstat = rd_regl(port, S3C2410_UERSTAT); |
| 236 | ch = rd_regb(port, S3C2410_URXH); |
| 237 | |
| 238 | if (port->flags & UPF_CONS_FLOW) { |
| 239 | int txe = s3c24xx_serial_txempty_nofifo(port); |
| 240 | |
| 241 | if (rx_enabled(port)) { |
| 242 | if (!txe) { |
| 243 | rx_enabled(port) = 0; |
| 244 | continue; |
| 245 | } |
| 246 | } else { |
| 247 | if (txe) { |
| 248 | ufcon |= S3C2410_UFCON_RESETRX; |
| 249 | wr_regl(port, S3C2410_UFCON, ufcon); |
| 250 | rx_enabled(port) = 1; |
| 251 | goto out; |
| 252 | } |
| 253 | continue; |
| 254 | } |
| 255 | } |
| 256 | |
| 257 | /* insert the character into the buffer */ |
| 258 | |
| 259 | flag = TTY_NORMAL; |
| 260 | port->icount.rx++; |
| 261 | |
| 262 | if (unlikely(uerstat & S3C2410_UERSTAT_ANY)) { |
| 263 | dbg("rxerr: port ch=0x%02x, rxs=0x%08x\n", |
| 264 | ch, uerstat); |
| 265 | |
| 266 | /* check for break */ |
| 267 | if (uerstat & S3C2410_UERSTAT_BREAK) { |
| 268 | dbg("break!\n"); |
| 269 | port->icount.brk++; |
| 270 | if (uart_handle_break(port)) |
| 271 | goto ignore_char; |
| 272 | } |
| 273 | |
| 274 | if (uerstat & S3C2410_UERSTAT_FRAME) |
| 275 | port->icount.frame++; |
| 276 | if (uerstat & S3C2410_UERSTAT_OVERRUN) |
| 277 | port->icount.overrun++; |
| 278 | |
| 279 | uerstat &= port->read_status_mask; |
| 280 | |
| 281 | if (uerstat & S3C2410_UERSTAT_BREAK) |
| 282 | flag = TTY_BREAK; |
| 283 | else if (uerstat & S3C2410_UERSTAT_PARITY) |
| 284 | flag = TTY_PARITY; |
| 285 | else if (uerstat & (S3C2410_UERSTAT_FRAME | |
| 286 | S3C2410_UERSTAT_OVERRUN)) |
| 287 | flag = TTY_FRAME; |
| 288 | } |
| 289 | |
| 290 | if (uart_handle_sysrq_char(port, ch)) |
| 291 | goto ignore_char; |
| 292 | |
| 293 | uart_insert_char(port, uerstat, S3C2410_UERSTAT_OVERRUN, |
| 294 | ch, flag); |
| 295 | |
| 296 | ignore_char: |
| 297 | continue; |
| 298 | } |
| 299 | tty_flip_buffer_push(tty); |
| 300 | |
| 301 | out: |
| 302 | return IRQ_HANDLED; |
| 303 | } |
| 304 | |
| 305 | static irqreturn_t s3c24xx_serial_tx_chars(int irq, void *id) |
| 306 | { |
| 307 | struct s3c24xx_uart_port *ourport = id; |
| 308 | struct uart_port *port = &ourport->port; |
Alan Cox | ebd2c8f | 2009-09-19 13:13:28 -0700 | [diff] [blame] | 309 | struct circ_buf *xmit = &port->state->xmit; |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 310 | int count = 256; |
| 311 | |
| 312 | if (port->x_char) { |
| 313 | wr_regb(port, S3C2410_UTXH, port->x_char); |
| 314 | port->icount.tx++; |
| 315 | port->x_char = 0; |
| 316 | goto out; |
| 317 | } |
| 318 | |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 319 | /* if there isn't anything more to transmit, or the uart is now |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 320 | * stopped, disable the uart and exit |
| 321 | */ |
| 322 | |
| 323 | if (uart_circ_empty(xmit) || uart_tx_stopped(port)) { |
| 324 | s3c24xx_serial_stop_tx(port); |
| 325 | goto out; |
| 326 | } |
| 327 | |
| 328 | /* try and drain the buffer... */ |
| 329 | |
| 330 | while (!uart_circ_empty(xmit) && count-- > 0) { |
| 331 | if (rd_regl(port, S3C2410_UFSTAT) & ourport->info->tx_fifofull) |
| 332 | break; |
| 333 | |
| 334 | wr_regb(port, S3C2410_UTXH, xmit->buf[xmit->tail]); |
| 335 | xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); |
| 336 | port->icount.tx++; |
| 337 | } |
| 338 | |
| 339 | if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) |
| 340 | uart_write_wakeup(port); |
| 341 | |
| 342 | if (uart_circ_empty(xmit)) |
| 343 | s3c24xx_serial_stop_tx(port); |
| 344 | |
| 345 | out: |
| 346 | return IRQ_HANDLED; |
| 347 | } |
| 348 | |
Thomas Abraham | 88bb4ea | 2011-08-10 15:51:19 +0530 | [diff] [blame] | 349 | /* interrupt handler for s3c64xx and later SoC's.*/ |
| 350 | static irqreturn_t s3c64xx_serial_handle_irq(int irq, void *id) |
| 351 | { |
| 352 | struct s3c24xx_uart_port *ourport = id; |
| 353 | struct uart_port *port = &ourport->port; |
| 354 | unsigned int pend = rd_regl(port, S3C64XX_UINTP); |
| 355 | unsigned long flags; |
| 356 | irqreturn_t ret = IRQ_HANDLED; |
| 357 | |
| 358 | spin_lock_irqsave(&port->lock, flags); |
| 359 | if (pend & S3C64XX_UINTM_RXD_MSK) { |
| 360 | ret = s3c24xx_serial_rx_chars(irq, id); |
| 361 | wr_regl(port, S3C64XX_UINTP, S3C64XX_UINTM_RXD_MSK); |
| 362 | } |
| 363 | if (pend & S3C64XX_UINTM_TXD_MSK) { |
| 364 | ret = s3c24xx_serial_tx_chars(irq, id); |
| 365 | wr_regl(port, S3C64XX_UINTP, S3C64XX_UINTM_TXD_MSK); |
| 366 | } |
| 367 | spin_unlock_irqrestore(&port->lock, flags); |
| 368 | return ret; |
| 369 | } |
| 370 | |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 371 | static unsigned int s3c24xx_serial_tx_empty(struct uart_port *port) |
| 372 | { |
| 373 | struct s3c24xx_uart_info *info = s3c24xx_port_to_info(port); |
| 374 | unsigned long ufstat = rd_regl(port, S3C2410_UFSTAT); |
| 375 | unsigned long ufcon = rd_regl(port, S3C2410_UFCON); |
| 376 | |
| 377 | if (ufcon & S3C2410_UFCON_FIFOMODE) { |
| 378 | if ((ufstat & info->tx_fifomask) != 0 || |
| 379 | (ufstat & info->tx_fifofull)) |
| 380 | return 0; |
| 381 | |
| 382 | return 1; |
| 383 | } |
| 384 | |
| 385 | return s3c24xx_serial_txempty_nofifo(port); |
| 386 | } |
| 387 | |
| 388 | /* no modem control lines */ |
| 389 | static unsigned int s3c24xx_serial_get_mctrl(struct uart_port *port) |
| 390 | { |
| 391 | unsigned int umstat = rd_regb(port, S3C2410_UMSTAT); |
| 392 | |
| 393 | if (umstat & S3C2410_UMSTAT_CTS) |
| 394 | return TIOCM_CAR | TIOCM_DSR | TIOCM_CTS; |
| 395 | else |
| 396 | return TIOCM_CAR | TIOCM_DSR; |
| 397 | } |
| 398 | |
| 399 | static void s3c24xx_serial_set_mctrl(struct uart_port *port, unsigned int mctrl) |
| 400 | { |
| 401 | /* todo - possibly remove AFC and do manual CTS */ |
| 402 | } |
| 403 | |
| 404 | static void s3c24xx_serial_break_ctl(struct uart_port *port, int break_state) |
| 405 | { |
| 406 | unsigned long flags; |
| 407 | unsigned int ucon; |
| 408 | |
| 409 | spin_lock_irqsave(&port->lock, flags); |
| 410 | |
| 411 | ucon = rd_regl(port, S3C2410_UCON); |
| 412 | |
| 413 | if (break_state) |
| 414 | ucon |= S3C2410_UCON_SBREAK; |
| 415 | else |
| 416 | ucon &= ~S3C2410_UCON_SBREAK; |
| 417 | |
| 418 | wr_regl(port, S3C2410_UCON, ucon); |
| 419 | |
| 420 | spin_unlock_irqrestore(&port->lock, flags); |
| 421 | } |
| 422 | |
| 423 | static void s3c24xx_serial_shutdown(struct uart_port *port) |
| 424 | { |
| 425 | struct s3c24xx_uart_port *ourport = to_ourport(port); |
| 426 | |
| 427 | if (ourport->tx_claimed) { |
Thomas Abraham | 88bb4ea | 2011-08-10 15:51:19 +0530 | [diff] [blame] | 428 | if (!s3c24xx_serial_has_interrupt_mask(port)) |
| 429 | free_irq(ourport->tx_irq, ourport); |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 430 | tx_enabled(port) = 0; |
| 431 | ourport->tx_claimed = 0; |
| 432 | } |
| 433 | |
| 434 | if (ourport->rx_claimed) { |
Thomas Abraham | 88bb4ea | 2011-08-10 15:51:19 +0530 | [diff] [blame] | 435 | if (!s3c24xx_serial_has_interrupt_mask(port)) |
| 436 | free_irq(ourport->rx_irq, ourport); |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 437 | ourport->rx_claimed = 0; |
| 438 | rx_enabled(port) = 0; |
| 439 | } |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 440 | |
Thomas Abraham | 88bb4ea | 2011-08-10 15:51:19 +0530 | [diff] [blame] | 441 | /* Clear pending interrupts and mask all interrupts */ |
| 442 | if (s3c24xx_serial_has_interrupt_mask(port)) { |
| 443 | wr_regl(port, S3C64XX_UINTP, 0xf); |
| 444 | wr_regl(port, S3C64XX_UINTM, 0xf); |
| 445 | } |
| 446 | } |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 447 | |
| 448 | static int s3c24xx_serial_startup(struct uart_port *port) |
| 449 | { |
| 450 | struct s3c24xx_uart_port *ourport = to_ourport(port); |
| 451 | int ret; |
| 452 | |
| 453 | dbg("s3c24xx_serial_startup: port=%p (%08lx,%p)\n", |
| 454 | port->mapbase, port->membase); |
| 455 | |
| 456 | rx_enabled(port) = 1; |
| 457 | |
Ben Dooks | b73c289 | 2008-10-21 14:07:04 +0100 | [diff] [blame] | 458 | ret = request_irq(ourport->rx_irq, s3c24xx_serial_rx_chars, 0, |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 459 | s3c24xx_serial_portname(port), ourport); |
| 460 | |
| 461 | if (ret != 0) { |
Ben Dooks | b73c289 | 2008-10-21 14:07:04 +0100 | [diff] [blame] | 462 | printk(KERN_ERR "cannot get irq %d\n", ourport->rx_irq); |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 463 | return ret; |
| 464 | } |
| 465 | |
| 466 | ourport->rx_claimed = 1; |
| 467 | |
| 468 | dbg("requesting tx irq...\n"); |
| 469 | |
| 470 | tx_enabled(port) = 1; |
| 471 | |
Ben Dooks | b73c289 | 2008-10-21 14:07:04 +0100 | [diff] [blame] | 472 | ret = request_irq(ourport->tx_irq, s3c24xx_serial_tx_chars, 0, |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 473 | s3c24xx_serial_portname(port), ourport); |
| 474 | |
| 475 | if (ret) { |
Ben Dooks | b73c289 | 2008-10-21 14:07:04 +0100 | [diff] [blame] | 476 | printk(KERN_ERR "cannot get irq %d\n", ourport->tx_irq); |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 477 | goto err; |
| 478 | } |
| 479 | |
| 480 | ourport->tx_claimed = 1; |
| 481 | |
| 482 | dbg("s3c24xx_serial_startup ok\n"); |
| 483 | |
| 484 | /* the port reset code should have done the correct |
| 485 | * register setup for the port controls */ |
| 486 | |
| 487 | return ret; |
| 488 | |
| 489 | err: |
| 490 | s3c24xx_serial_shutdown(port); |
| 491 | return ret; |
| 492 | } |
| 493 | |
Thomas Abraham | 88bb4ea | 2011-08-10 15:51:19 +0530 | [diff] [blame] | 494 | static int s3c64xx_serial_startup(struct uart_port *port) |
| 495 | { |
| 496 | struct s3c24xx_uart_port *ourport = to_ourport(port); |
| 497 | int ret; |
| 498 | |
| 499 | dbg("s3c64xx_serial_startup: port=%p (%08lx,%p)\n", |
| 500 | port->mapbase, port->membase); |
| 501 | |
| 502 | ret = request_irq(port->irq, s3c64xx_serial_handle_irq, IRQF_SHARED, |
| 503 | s3c24xx_serial_portname(port), ourport); |
| 504 | if (ret) { |
| 505 | printk(KERN_ERR "cannot get irq %d\n", port->irq); |
| 506 | return ret; |
| 507 | } |
| 508 | |
| 509 | /* For compatibility with s3c24xx Soc's */ |
| 510 | rx_enabled(port) = 1; |
| 511 | ourport->rx_claimed = 1; |
| 512 | tx_enabled(port) = 0; |
| 513 | ourport->tx_claimed = 1; |
| 514 | |
| 515 | /* Enable Rx Interrupt */ |
| 516 | __clear_bit(S3C64XX_UINTM_RXD, portaddrl(port, S3C64XX_UINTM)); |
| 517 | dbg("s3c64xx_serial_startup ok\n"); |
| 518 | return ret; |
| 519 | } |
| 520 | |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 521 | /* power power management control */ |
| 522 | |
| 523 | static void s3c24xx_serial_pm(struct uart_port *port, unsigned int level, |
| 524 | unsigned int old) |
| 525 | { |
| 526 | struct s3c24xx_uart_port *ourport = to_ourport(port); |
| 527 | |
Ben Dooks | 3055547 | 2008-10-21 14:06:36 +0100 | [diff] [blame] | 528 | ourport->pm_level = level; |
| 529 | |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 530 | switch (level) { |
| 531 | case 3: |
| 532 | if (!IS_ERR(ourport->baudclk) && ourport->baudclk != NULL) |
| 533 | clk_disable(ourport->baudclk); |
| 534 | |
| 535 | clk_disable(ourport->clk); |
| 536 | break; |
| 537 | |
| 538 | case 0: |
| 539 | clk_enable(ourport->clk); |
| 540 | |
| 541 | if (!IS_ERR(ourport->baudclk) && ourport->baudclk != NULL) |
| 542 | clk_enable(ourport->baudclk); |
| 543 | |
| 544 | break; |
| 545 | default: |
| 546 | printk(KERN_ERR "s3c24xx_serial: unknown pm %d\n", level); |
| 547 | } |
| 548 | } |
| 549 | |
| 550 | /* baud rate calculation |
| 551 | * |
| 552 | * The UARTs on the S3C2410/S3C2440 can take their clocks from a number |
| 553 | * of different sources, including the peripheral clock ("pclk") and an |
| 554 | * external clock ("uclk"). The S3C2440 also adds the core clock ("fclk") |
| 555 | * with a programmable extra divisor. |
| 556 | * |
| 557 | * The following code goes through the clock sources, and calculates the |
| 558 | * baud clocks (and the resultant actual baud rates) and then tries to |
| 559 | * pick the closest one and select that. |
| 560 | * |
| 561 | */ |
| 562 | |
Thomas Abraham | 5f5a7a5 | 2011-10-24 11:47:46 +0200 | [diff] [blame] | 563 | #define MAX_CLK_NAME_LENGTH 15 |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 564 | |
Thomas Abraham | 5f5a7a5 | 2011-10-24 11:47:46 +0200 | [diff] [blame] | 565 | static inline int s3c24xx_serial_getsource(struct uart_port *port) |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 566 | { |
| 567 | struct s3c24xx_uart_info *info = s3c24xx_port_to_info(port); |
Thomas Abraham | 5f5a7a5 | 2011-10-24 11:47:46 +0200 | [diff] [blame] | 568 | unsigned int ucon; |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 569 | |
Thomas Abraham | 5f5a7a5 | 2011-10-24 11:47:46 +0200 | [diff] [blame] | 570 | if (info->num_clks == 1) |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 571 | return 0; |
| 572 | |
Thomas Abraham | 5f5a7a5 | 2011-10-24 11:47:46 +0200 | [diff] [blame] | 573 | ucon = rd_regl(port, S3C2410_UCON); |
| 574 | ucon &= info->clksel_mask; |
| 575 | return ucon >> info->clksel_shift; |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 576 | } |
| 577 | |
Thomas Abraham | 5f5a7a5 | 2011-10-24 11:47:46 +0200 | [diff] [blame] | 578 | static void s3c24xx_serial_setsource(struct uart_port *port, |
| 579 | unsigned int clk_sel) |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 580 | { |
Thomas Abraham | 5f5a7a5 | 2011-10-24 11:47:46 +0200 | [diff] [blame] | 581 | struct s3c24xx_uart_info *info = s3c24xx_port_to_info(port); |
| 582 | unsigned int ucon; |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 583 | |
Thomas Abraham | 5f5a7a5 | 2011-10-24 11:47:46 +0200 | [diff] [blame] | 584 | if (info->num_clks == 1) |
| 585 | return; |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 586 | |
Thomas Abraham | 5f5a7a5 | 2011-10-24 11:47:46 +0200 | [diff] [blame] | 587 | ucon = rd_regl(port, S3C2410_UCON); |
| 588 | if ((ucon & info->clksel_mask) >> info->clksel_shift == clk_sel) |
| 589 | return; |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 590 | |
Thomas Abraham | 5f5a7a5 | 2011-10-24 11:47:46 +0200 | [diff] [blame] | 591 | ucon &= ~info->clksel_mask; |
| 592 | ucon |= clk_sel << info->clksel_shift; |
| 593 | wr_regl(port, S3C2410_UCON, ucon); |
| 594 | } |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 595 | |
Thomas Abraham | 5f5a7a5 | 2011-10-24 11:47:46 +0200 | [diff] [blame] | 596 | static unsigned int s3c24xx_serial_getclk(struct s3c24xx_uart_port *ourport, |
| 597 | unsigned int req_baud, struct clk **best_clk, |
| 598 | unsigned int *clk_num) |
| 599 | { |
| 600 | struct s3c24xx_uart_info *info = ourport->info; |
| 601 | struct clk *clk; |
| 602 | unsigned long rate; |
| 603 | unsigned int cnt, baud, quot, clk_sel, best_quot = 0; |
| 604 | char clkname[MAX_CLK_NAME_LENGTH]; |
| 605 | int calc_deviation, deviation = (1 << 30) - 1; |
| 606 | |
| 607 | *best_clk = NULL; |
| 608 | clk_sel = (ourport->cfg->clk_sel) ? ourport->cfg->clk_sel : |
| 609 | ourport->info->def_clk_sel; |
| 610 | for (cnt = 0; cnt < info->num_clks; cnt++) { |
| 611 | if (!(clk_sel & (1 << cnt))) |
| 612 | continue; |
| 613 | |
| 614 | sprintf(clkname, "clk_uart_baud%d", cnt); |
| 615 | clk = clk_get(ourport->port.dev, clkname); |
| 616 | if (IS_ERR_OR_NULL(clk)) |
| 617 | continue; |
| 618 | |
| 619 | rate = clk_get_rate(clk); |
| 620 | if (!rate) |
| 621 | continue; |
| 622 | |
| 623 | if (ourport->info->has_divslot) { |
| 624 | unsigned long div = rate / req_baud; |
| 625 | |
| 626 | /* The UDIVSLOT register on the newer UARTs allows us to |
| 627 | * get a divisor adjustment of 1/16th on the baud clock. |
| 628 | * |
| 629 | * We don't keep the UDIVSLOT value (the 16ths we |
| 630 | * calculated by not multiplying the baud by 16) as it |
| 631 | * is easy enough to recalculate. |
| 632 | */ |
| 633 | |
| 634 | quot = div / 16; |
| 635 | baud = rate / div; |
| 636 | } else { |
| 637 | quot = (rate + (8 * req_baud)) / (16 * req_baud); |
| 638 | baud = rate / (quot * 16); |
| 639 | } |
| 640 | quot--; |
| 641 | |
| 642 | calc_deviation = req_baud - baud; |
| 643 | if (calc_deviation < 0) |
| 644 | calc_deviation = -calc_deviation; |
| 645 | |
| 646 | if (calc_deviation < deviation) { |
| 647 | *best_clk = clk; |
| 648 | best_quot = quot; |
| 649 | *clk_num = cnt; |
| 650 | deviation = calc_deviation; |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 651 | } |
| 652 | } |
| 653 | |
Thomas Abraham | 5f5a7a5 | 2011-10-24 11:47:46 +0200 | [diff] [blame] | 654 | return best_quot; |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 655 | } |
| 656 | |
Ben Dooks | 090f848 | 2008-12-12 00:24:21 +0000 | [diff] [blame] | 657 | /* udivslot_table[] |
| 658 | * |
| 659 | * This table takes the fractional value of the baud divisor and gives |
| 660 | * the recommended setting for the UDIVSLOT register. |
| 661 | */ |
| 662 | static u16 udivslot_table[16] = { |
| 663 | [0] = 0x0000, |
| 664 | [1] = 0x0080, |
| 665 | [2] = 0x0808, |
| 666 | [3] = 0x0888, |
| 667 | [4] = 0x2222, |
| 668 | [5] = 0x4924, |
| 669 | [6] = 0x4A52, |
| 670 | [7] = 0x54AA, |
| 671 | [8] = 0x5555, |
| 672 | [9] = 0xD555, |
| 673 | [10] = 0xD5D5, |
| 674 | [11] = 0xDDD5, |
| 675 | [12] = 0xDDDD, |
| 676 | [13] = 0xDFDD, |
| 677 | [14] = 0xDFDF, |
| 678 | [15] = 0xFFDF, |
| 679 | }; |
| 680 | |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 681 | static void s3c24xx_serial_set_termios(struct uart_port *port, |
| 682 | struct ktermios *termios, |
| 683 | struct ktermios *old) |
| 684 | { |
| 685 | struct s3c2410_uartcfg *cfg = s3c24xx_port_to_cfg(port); |
| 686 | struct s3c24xx_uart_port *ourport = to_ourport(port); |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 687 | struct clk *clk = NULL; |
| 688 | unsigned long flags; |
Thomas Abraham | 5f5a7a5 | 2011-10-24 11:47:46 +0200 | [diff] [blame] | 689 | unsigned int baud, quot, clk_sel = 0; |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 690 | unsigned int ulcon; |
| 691 | unsigned int umcon; |
Ben Dooks | 090f848 | 2008-12-12 00:24:21 +0000 | [diff] [blame] | 692 | unsigned int udivslot = 0; |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 693 | |
| 694 | /* |
| 695 | * We don't support modem control lines. |
| 696 | */ |
| 697 | termios->c_cflag &= ~(HUPCL | CMSPAR); |
| 698 | termios->c_cflag |= CLOCAL; |
| 699 | |
| 700 | /* |
| 701 | * Ask the core to calculate the divisor for us. |
| 702 | */ |
| 703 | |
| 704 | baud = uart_get_baud_rate(port, termios, old, 0, 115200*8); |
Thomas Abraham | 5f5a7a5 | 2011-10-24 11:47:46 +0200 | [diff] [blame] | 705 | quot = s3c24xx_serial_getclk(ourport, baud, &clk, &clk_sel); |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 706 | if (baud == 38400 && (port->flags & UPF_SPD_MASK) == UPF_SPD_CUST) |
| 707 | quot = port->custom_divisor; |
Thomas Abraham | 5f5a7a5 | 2011-10-24 11:47:46 +0200 | [diff] [blame] | 708 | if (!clk) |
| 709 | return; |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 710 | |
| 711 | /* check to see if we need to change clock source */ |
| 712 | |
Thomas Abraham | 5f5a7a5 | 2011-10-24 11:47:46 +0200 | [diff] [blame] | 713 | if (ourport->baudclk != clk) { |
| 714 | s3c24xx_serial_setsource(port, clk_sel); |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 715 | |
| 716 | if (ourport->baudclk != NULL && !IS_ERR(ourport->baudclk)) { |
| 717 | clk_disable(ourport->baudclk); |
| 718 | ourport->baudclk = NULL; |
| 719 | } |
| 720 | |
| 721 | clk_enable(clk); |
| 722 | |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 723 | ourport->baudclk = clk; |
Ben Dooks | 3055547 | 2008-10-21 14:06:36 +0100 | [diff] [blame] | 724 | ourport->baudclk_rate = clk ? clk_get_rate(clk) : 0; |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 725 | } |
| 726 | |
Ben Dooks | 090f848 | 2008-12-12 00:24:21 +0000 | [diff] [blame] | 727 | if (ourport->info->has_divslot) { |
| 728 | unsigned int div = ourport->baudclk_rate / baud; |
| 729 | |
Jongpill Lee | 8b526ae | 2010-07-16 10:19:41 +0900 | [diff] [blame] | 730 | if (cfg->has_fracval) { |
| 731 | udivslot = (div & 15); |
| 732 | dbg("fracval = %04x\n", udivslot); |
| 733 | } else { |
| 734 | udivslot = udivslot_table[div & 15]; |
| 735 | dbg("udivslot = %04x (div %d)\n", udivslot, div & 15); |
| 736 | } |
Ben Dooks | 090f848 | 2008-12-12 00:24:21 +0000 | [diff] [blame] | 737 | } |
| 738 | |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 739 | switch (termios->c_cflag & CSIZE) { |
| 740 | case CS5: |
| 741 | dbg("config: 5bits/char\n"); |
| 742 | ulcon = S3C2410_LCON_CS5; |
| 743 | break; |
| 744 | case CS6: |
| 745 | dbg("config: 6bits/char\n"); |
| 746 | ulcon = S3C2410_LCON_CS6; |
| 747 | break; |
| 748 | case CS7: |
| 749 | dbg("config: 7bits/char\n"); |
| 750 | ulcon = S3C2410_LCON_CS7; |
| 751 | break; |
| 752 | case CS8: |
| 753 | default: |
| 754 | dbg("config: 8bits/char\n"); |
| 755 | ulcon = S3C2410_LCON_CS8; |
| 756 | break; |
| 757 | } |
| 758 | |
| 759 | /* preserve original lcon IR settings */ |
| 760 | ulcon |= (cfg->ulcon & S3C2410_LCON_IRM); |
| 761 | |
| 762 | if (termios->c_cflag & CSTOPB) |
| 763 | ulcon |= S3C2410_LCON_STOPB; |
| 764 | |
| 765 | umcon = (termios->c_cflag & CRTSCTS) ? S3C2410_UMCOM_AFC : 0; |
| 766 | |
| 767 | if (termios->c_cflag & PARENB) { |
| 768 | if (termios->c_cflag & PARODD) |
| 769 | ulcon |= S3C2410_LCON_PODD; |
| 770 | else |
| 771 | ulcon |= S3C2410_LCON_PEVEN; |
| 772 | } else { |
| 773 | ulcon |= S3C2410_LCON_PNONE; |
| 774 | } |
| 775 | |
| 776 | spin_lock_irqsave(&port->lock, flags); |
| 777 | |
Ben Dooks | 090f848 | 2008-12-12 00:24:21 +0000 | [diff] [blame] | 778 | dbg("setting ulcon to %08x, brddiv to %d, udivslot %08x\n", |
| 779 | ulcon, quot, udivslot); |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 780 | |
| 781 | wr_regl(port, S3C2410_ULCON, ulcon); |
| 782 | wr_regl(port, S3C2410_UBRDIV, quot); |
| 783 | wr_regl(port, S3C2410_UMCON, umcon); |
| 784 | |
Ben Dooks | 090f848 | 2008-12-12 00:24:21 +0000 | [diff] [blame] | 785 | if (ourport->info->has_divslot) |
| 786 | wr_regl(port, S3C2443_DIVSLOT, udivslot); |
| 787 | |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 788 | dbg("uart: ulcon = 0x%08x, ucon = 0x%08x, ufcon = 0x%08x\n", |
| 789 | rd_regl(port, S3C2410_ULCON), |
| 790 | rd_regl(port, S3C2410_UCON), |
| 791 | rd_regl(port, S3C2410_UFCON)); |
| 792 | |
| 793 | /* |
| 794 | * Update the per-port timeout. |
| 795 | */ |
| 796 | uart_update_timeout(port, termios->c_cflag, baud); |
| 797 | |
| 798 | /* |
| 799 | * Which character status flags are we interested in? |
| 800 | */ |
| 801 | port->read_status_mask = S3C2410_UERSTAT_OVERRUN; |
| 802 | if (termios->c_iflag & INPCK) |
| 803 | port->read_status_mask |= S3C2410_UERSTAT_FRAME | S3C2410_UERSTAT_PARITY; |
| 804 | |
| 805 | /* |
| 806 | * Which character status flags should we ignore? |
| 807 | */ |
| 808 | port->ignore_status_mask = 0; |
| 809 | if (termios->c_iflag & IGNPAR) |
| 810 | port->ignore_status_mask |= S3C2410_UERSTAT_OVERRUN; |
| 811 | if (termios->c_iflag & IGNBRK && termios->c_iflag & IGNPAR) |
| 812 | port->ignore_status_mask |= S3C2410_UERSTAT_FRAME; |
| 813 | |
| 814 | /* |
| 815 | * Ignore all characters if CREAD is not set. |
| 816 | */ |
| 817 | if ((termios->c_cflag & CREAD) == 0) |
| 818 | port->ignore_status_mask |= RXSTAT_DUMMY_READ; |
| 819 | |
| 820 | spin_unlock_irqrestore(&port->lock, flags); |
| 821 | } |
| 822 | |
| 823 | static const char *s3c24xx_serial_type(struct uart_port *port) |
| 824 | { |
| 825 | switch (port->type) { |
| 826 | case PORT_S3C2410: |
| 827 | return "S3C2410"; |
| 828 | case PORT_S3C2440: |
| 829 | return "S3C2440"; |
| 830 | case PORT_S3C2412: |
| 831 | return "S3C2412"; |
Ben Dooks | b690ace | 2008-10-21 14:07:03 +0100 | [diff] [blame] | 832 | case PORT_S3C6400: |
| 833 | return "S3C6400/10"; |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 834 | default: |
| 835 | return NULL; |
| 836 | } |
| 837 | } |
| 838 | |
| 839 | #define MAP_SIZE (0x100) |
| 840 | |
| 841 | static void s3c24xx_serial_release_port(struct uart_port *port) |
| 842 | { |
| 843 | release_mem_region(port->mapbase, MAP_SIZE); |
| 844 | } |
| 845 | |
| 846 | static int s3c24xx_serial_request_port(struct uart_port *port) |
| 847 | { |
| 848 | const char *name = s3c24xx_serial_portname(port); |
| 849 | return request_mem_region(port->mapbase, MAP_SIZE, name) ? 0 : -EBUSY; |
| 850 | } |
| 851 | |
| 852 | static void s3c24xx_serial_config_port(struct uart_port *port, int flags) |
| 853 | { |
| 854 | struct s3c24xx_uart_info *info = s3c24xx_port_to_info(port); |
| 855 | |
| 856 | if (flags & UART_CONFIG_TYPE && |
| 857 | s3c24xx_serial_request_port(port) == 0) |
| 858 | port->type = info->type; |
| 859 | } |
| 860 | |
| 861 | /* |
| 862 | * verify the new serial_struct (for TIOCSSERIAL). |
| 863 | */ |
| 864 | static int |
| 865 | s3c24xx_serial_verify_port(struct uart_port *port, struct serial_struct *ser) |
| 866 | { |
| 867 | struct s3c24xx_uart_info *info = s3c24xx_port_to_info(port); |
| 868 | |
| 869 | if (ser->type != PORT_UNKNOWN && ser->type != info->type) |
| 870 | return -EINVAL; |
| 871 | |
| 872 | return 0; |
| 873 | } |
| 874 | |
| 875 | |
| 876 | #ifdef CONFIG_SERIAL_SAMSUNG_CONSOLE |
| 877 | |
| 878 | static struct console s3c24xx_serial_console; |
| 879 | |
| 880 | #define S3C24XX_SERIAL_CONSOLE &s3c24xx_serial_console |
| 881 | #else |
| 882 | #define S3C24XX_SERIAL_CONSOLE NULL |
| 883 | #endif |
| 884 | |
| 885 | static struct uart_ops s3c24xx_serial_ops = { |
| 886 | .pm = s3c24xx_serial_pm, |
| 887 | .tx_empty = s3c24xx_serial_tx_empty, |
| 888 | .get_mctrl = s3c24xx_serial_get_mctrl, |
| 889 | .set_mctrl = s3c24xx_serial_set_mctrl, |
| 890 | .stop_tx = s3c24xx_serial_stop_tx, |
| 891 | .start_tx = s3c24xx_serial_start_tx, |
| 892 | .stop_rx = s3c24xx_serial_stop_rx, |
| 893 | .enable_ms = s3c24xx_serial_enable_ms, |
| 894 | .break_ctl = s3c24xx_serial_break_ctl, |
| 895 | .startup = s3c24xx_serial_startup, |
| 896 | .shutdown = s3c24xx_serial_shutdown, |
| 897 | .set_termios = s3c24xx_serial_set_termios, |
| 898 | .type = s3c24xx_serial_type, |
| 899 | .release_port = s3c24xx_serial_release_port, |
| 900 | .request_port = s3c24xx_serial_request_port, |
| 901 | .config_port = s3c24xx_serial_config_port, |
| 902 | .verify_port = s3c24xx_serial_verify_port, |
| 903 | }; |
| 904 | |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 905 | static struct uart_driver s3c24xx_uart_drv = { |
| 906 | .owner = THIS_MODULE, |
Darius Augulis | 2cf0c58 | 2011-01-12 14:50:51 +0900 | [diff] [blame] | 907 | .driver_name = "s3c2410_serial", |
Ben Dooks | bdd4915 | 2008-11-03 19:51:42 +0000 | [diff] [blame] | 908 | .nr = CONFIG_SERIAL_SAMSUNG_UARTS, |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 909 | .cons = S3C24XX_SERIAL_CONSOLE, |
Darius Augulis | 2cf0c58 | 2011-01-12 14:50:51 +0900 | [diff] [blame] | 910 | .dev_name = S3C24XX_SERIAL_NAME, |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 911 | .major = S3C24XX_SERIAL_MAJOR, |
| 912 | .minor = S3C24XX_SERIAL_MINOR, |
| 913 | }; |
| 914 | |
Ben Dooks | 03d5e77 | 2008-11-03 09:21:23 +0000 | [diff] [blame] | 915 | static struct s3c24xx_uart_port s3c24xx_serial_ports[CONFIG_SERIAL_SAMSUNG_UARTS] = { |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 916 | [0] = { |
| 917 | .port = { |
| 918 | .lock = __SPIN_LOCK_UNLOCKED(s3c24xx_serial_ports[0].port.lock), |
| 919 | .iotype = UPIO_MEM, |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 920 | .uartclk = 0, |
| 921 | .fifosize = 16, |
| 922 | .ops = &s3c24xx_serial_ops, |
| 923 | .flags = UPF_BOOT_AUTOCONF, |
| 924 | .line = 0, |
| 925 | } |
| 926 | }, |
| 927 | [1] = { |
| 928 | .port = { |
| 929 | .lock = __SPIN_LOCK_UNLOCKED(s3c24xx_serial_ports[1].port.lock), |
| 930 | .iotype = UPIO_MEM, |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 931 | .uartclk = 0, |
| 932 | .fifosize = 16, |
| 933 | .ops = &s3c24xx_serial_ops, |
| 934 | .flags = UPF_BOOT_AUTOCONF, |
| 935 | .line = 1, |
| 936 | } |
| 937 | }, |
Ben Dooks | 03d5e77 | 2008-11-03 09:21:23 +0000 | [diff] [blame] | 938 | #if CONFIG_SERIAL_SAMSUNG_UARTS > 2 |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 939 | |
| 940 | [2] = { |
| 941 | .port = { |
| 942 | .lock = __SPIN_LOCK_UNLOCKED(s3c24xx_serial_ports[2].port.lock), |
| 943 | .iotype = UPIO_MEM, |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 944 | .uartclk = 0, |
| 945 | .fifosize = 16, |
| 946 | .ops = &s3c24xx_serial_ops, |
| 947 | .flags = UPF_BOOT_AUTOCONF, |
| 948 | .line = 2, |
| 949 | } |
Ben Dooks | 03d5e77 | 2008-11-03 09:21:23 +0000 | [diff] [blame] | 950 | }, |
| 951 | #endif |
| 952 | #if CONFIG_SERIAL_SAMSUNG_UARTS > 3 |
| 953 | [3] = { |
| 954 | .port = { |
| 955 | .lock = __SPIN_LOCK_UNLOCKED(s3c24xx_serial_ports[3].port.lock), |
| 956 | .iotype = UPIO_MEM, |
Ben Dooks | 03d5e77 | 2008-11-03 09:21:23 +0000 | [diff] [blame] | 957 | .uartclk = 0, |
| 958 | .fifosize = 16, |
| 959 | .ops = &s3c24xx_serial_ops, |
| 960 | .flags = UPF_BOOT_AUTOCONF, |
| 961 | .line = 3, |
| 962 | } |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 963 | } |
| 964 | #endif |
| 965 | }; |
| 966 | |
| 967 | /* s3c24xx_serial_resetport |
| 968 | * |
Thomas Abraham | 0dfb3b4 | 2011-10-24 11:48:21 +0200 | [diff] [blame] | 969 | * reset the fifos and other the settings. |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 970 | */ |
| 971 | |
Thomas Abraham | 0dfb3b4 | 2011-10-24 11:48:21 +0200 | [diff] [blame] | 972 | static void s3c24xx_serial_resetport(struct uart_port *port, |
| 973 | struct s3c2410_uartcfg *cfg) |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 974 | { |
| 975 | struct s3c24xx_uart_info *info = s3c24xx_port_to_info(port); |
Thomas Abraham | 0dfb3b4 | 2011-10-24 11:48:21 +0200 | [diff] [blame] | 976 | unsigned long ucon = rd_regl(port, S3C2410_UCON); |
| 977 | unsigned int ucon_mask; |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 978 | |
Thomas Abraham | 0dfb3b4 | 2011-10-24 11:48:21 +0200 | [diff] [blame] | 979 | ucon_mask = info->clksel_mask; |
| 980 | if (info->type == PORT_S3C2440) |
| 981 | ucon_mask |= S3C2440_UCON0_DIVMASK; |
| 982 | |
| 983 | ucon &= ucon_mask; |
| 984 | wr_regl(port, S3C2410_UCON, ucon | cfg->ucon); |
| 985 | |
| 986 | /* reset both fifos */ |
| 987 | wr_regl(port, S3C2410_UFCON, cfg->ufcon | S3C2410_UFCON_RESETBOTH); |
| 988 | wr_regl(port, S3C2410_UFCON, cfg->ufcon); |
| 989 | |
| 990 | /* some delay is required after fifo reset */ |
| 991 | udelay(1); |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 992 | } |
| 993 | |
Ben Dooks | 3055547 | 2008-10-21 14:06:36 +0100 | [diff] [blame] | 994 | |
| 995 | #ifdef CONFIG_CPU_FREQ |
| 996 | |
| 997 | static int s3c24xx_serial_cpufreq_transition(struct notifier_block *nb, |
| 998 | unsigned long val, void *data) |
| 999 | { |
| 1000 | struct s3c24xx_uart_port *port; |
| 1001 | struct uart_port *uport; |
| 1002 | |
| 1003 | port = container_of(nb, struct s3c24xx_uart_port, freq_transition); |
| 1004 | uport = &port->port; |
| 1005 | |
| 1006 | /* check to see if port is enabled */ |
| 1007 | |
| 1008 | if (port->pm_level != 0) |
| 1009 | return 0; |
| 1010 | |
| 1011 | /* try and work out if the baudrate is changing, we can detect |
| 1012 | * a change in rate, but we do not have support for detecting |
| 1013 | * a disturbance in the clock-rate over the change. |
| 1014 | */ |
| 1015 | |
| 1016 | if (IS_ERR(port->clk)) |
| 1017 | goto exit; |
| 1018 | |
| 1019 | if (port->baudclk_rate == clk_get_rate(port->clk)) |
| 1020 | goto exit; |
| 1021 | |
| 1022 | if (val == CPUFREQ_PRECHANGE) { |
| 1023 | /* we should really shut the port down whilst the |
| 1024 | * frequency change is in progress. */ |
| 1025 | |
| 1026 | } else if (val == CPUFREQ_POSTCHANGE) { |
| 1027 | struct ktermios *termios; |
| 1028 | struct tty_struct *tty; |
| 1029 | |
Alan Cox | ebd2c8f | 2009-09-19 13:13:28 -0700 | [diff] [blame] | 1030 | if (uport->state == NULL) |
Ben Dooks | 3055547 | 2008-10-21 14:06:36 +0100 | [diff] [blame] | 1031 | goto exit; |
Ben Dooks | 3055547 | 2008-10-21 14:06:36 +0100 | [diff] [blame] | 1032 | |
Alan Cox | ebd2c8f | 2009-09-19 13:13:28 -0700 | [diff] [blame] | 1033 | tty = uport->state->port.tty; |
Ben Dooks | 3055547 | 2008-10-21 14:06:36 +0100 | [diff] [blame] | 1034 | |
Ben Dooks | 7de40c2 | 2008-12-14 23:11:02 +0000 | [diff] [blame] | 1035 | if (tty == NULL) |
Ben Dooks | 3055547 | 2008-10-21 14:06:36 +0100 | [diff] [blame] | 1036 | goto exit; |
Ben Dooks | 3055547 | 2008-10-21 14:06:36 +0100 | [diff] [blame] | 1037 | |
| 1038 | termios = tty->termios; |
| 1039 | |
| 1040 | if (termios == NULL) { |
| 1041 | printk(KERN_WARNING "%s: no termios?\n", __func__); |
| 1042 | goto exit; |
| 1043 | } |
| 1044 | |
| 1045 | s3c24xx_serial_set_termios(uport, termios, NULL); |
| 1046 | } |
| 1047 | |
| 1048 | exit: |
| 1049 | return 0; |
| 1050 | } |
| 1051 | |
| 1052 | static inline int s3c24xx_serial_cpufreq_register(struct s3c24xx_uart_port *port) |
| 1053 | { |
| 1054 | port->freq_transition.notifier_call = s3c24xx_serial_cpufreq_transition; |
| 1055 | |
| 1056 | return cpufreq_register_notifier(&port->freq_transition, |
| 1057 | CPUFREQ_TRANSITION_NOTIFIER); |
| 1058 | } |
| 1059 | |
| 1060 | static inline void s3c24xx_serial_cpufreq_deregister(struct s3c24xx_uart_port *port) |
| 1061 | { |
| 1062 | cpufreq_unregister_notifier(&port->freq_transition, |
| 1063 | CPUFREQ_TRANSITION_NOTIFIER); |
| 1064 | } |
| 1065 | |
| 1066 | #else |
| 1067 | static inline int s3c24xx_serial_cpufreq_register(struct s3c24xx_uart_port *port) |
| 1068 | { |
| 1069 | return 0; |
| 1070 | } |
| 1071 | |
| 1072 | static inline void s3c24xx_serial_cpufreq_deregister(struct s3c24xx_uart_port *port) |
| 1073 | { |
| 1074 | } |
| 1075 | #endif |
| 1076 | |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 1077 | /* s3c24xx_serial_init_port |
| 1078 | * |
| 1079 | * initialise a single serial port from the platform device given |
| 1080 | */ |
| 1081 | |
| 1082 | static int s3c24xx_serial_init_port(struct s3c24xx_uart_port *ourport, |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 1083 | struct platform_device *platdev) |
| 1084 | { |
| 1085 | struct uart_port *port = &ourport->port; |
Thomas Abraham | da12150 | 2011-11-02 19:23:25 +0900 | [diff] [blame] | 1086 | struct s3c2410_uartcfg *cfg = ourport->cfg; |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 1087 | struct resource *res; |
| 1088 | int ret; |
| 1089 | |
| 1090 | dbg("s3c24xx_serial_init_port: port=%p, platdev=%p\n", port, platdev); |
| 1091 | |
| 1092 | if (platdev == NULL) |
| 1093 | return -ENODEV; |
| 1094 | |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 1095 | if (port->mapbase != 0) |
| 1096 | return 0; |
| 1097 | |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 1098 | /* setup info for port */ |
| 1099 | port->dev = &platdev->dev; |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 1100 | |
Thomas Abraham | 88bb4ea | 2011-08-10 15:51:19 +0530 | [diff] [blame] | 1101 | /* Startup sequence is different for s3c64xx and higher SoC's */ |
| 1102 | if (s3c24xx_serial_has_interrupt_mask(port)) |
| 1103 | s3c24xx_serial_ops.startup = s3c64xx_serial_startup; |
| 1104 | |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 1105 | port->uartclk = 1; |
| 1106 | |
| 1107 | if (cfg->uart_flags & UPF_CONS_FLOW) { |
| 1108 | dbg("s3c24xx_serial_init_port: enabling flow control\n"); |
| 1109 | port->flags |= UPF_CONS_FLOW; |
| 1110 | } |
| 1111 | |
| 1112 | /* sort our the physical and virtual addresses for each UART */ |
| 1113 | |
| 1114 | res = platform_get_resource(platdev, IORESOURCE_MEM, 0); |
| 1115 | if (res == NULL) { |
| 1116 | printk(KERN_ERR "failed to find memory resource for uart\n"); |
| 1117 | return -EINVAL; |
| 1118 | } |
| 1119 | |
| 1120 | dbg("resource %p (%lx..%lx)\n", res, res->start, res->end); |
| 1121 | |
Ben Dooks | b690ace | 2008-10-21 14:07:03 +0100 | [diff] [blame] | 1122 | port->mapbase = res->start; |
Kukjin Kim | 2555e66 | 2010-09-01 15:13:44 +0900 | [diff] [blame] | 1123 | port->membase = S3C_VA_UART + (res->start & 0xfffff); |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 1124 | ret = platform_get_irq(platdev, 0); |
| 1125 | if (ret < 0) |
| 1126 | port->irq = 0; |
Ben Dooks | b73c289 | 2008-10-21 14:07:04 +0100 | [diff] [blame] | 1127 | else { |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 1128 | port->irq = ret; |
Ben Dooks | b73c289 | 2008-10-21 14:07:04 +0100 | [diff] [blame] | 1129 | ourport->rx_irq = ret; |
| 1130 | ourport->tx_irq = ret + 1; |
| 1131 | } |
| 1132 | |
| 1133 | ret = platform_get_irq(platdev, 1); |
| 1134 | if (ret > 0) |
| 1135 | ourport->tx_irq = ret; |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 1136 | |
| 1137 | ourport->clk = clk_get(&platdev->dev, "uart"); |
| 1138 | |
Thomas Abraham | 88bb4ea | 2011-08-10 15:51:19 +0530 | [diff] [blame] | 1139 | /* Keep all interrupts masked and cleared */ |
| 1140 | if (s3c24xx_serial_has_interrupt_mask(port)) { |
| 1141 | wr_regl(port, S3C64XX_UINTM, 0xf); |
| 1142 | wr_regl(port, S3C64XX_UINTP, 0xf); |
| 1143 | wr_regl(port, S3C64XX_UINTSP, 0xf); |
| 1144 | } |
| 1145 | |
Ben Dooks | b73c289 | 2008-10-21 14:07:04 +0100 | [diff] [blame] | 1146 | dbg("port: map=%08x, mem=%08x, irq=%d (%d,%d), clock=%ld\n", |
| 1147 | port->mapbase, port->membase, port->irq, |
| 1148 | ourport->rx_irq, ourport->tx_irq, port->uartclk); |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 1149 | |
| 1150 | /* reset the fifos (and setup the uart) */ |
| 1151 | s3c24xx_serial_resetport(port, cfg); |
| 1152 | return 0; |
| 1153 | } |
| 1154 | |
| 1155 | static ssize_t s3c24xx_serial_show_clksrc(struct device *dev, |
| 1156 | struct device_attribute *attr, |
| 1157 | char *buf) |
| 1158 | { |
| 1159 | struct uart_port *port = s3c24xx_dev_to_port(dev); |
| 1160 | struct s3c24xx_uart_port *ourport = to_ourport(port); |
| 1161 | |
Thomas Abraham | 5f5a7a5 | 2011-10-24 11:47:46 +0200 | [diff] [blame] | 1162 | return snprintf(buf, PAGE_SIZE, "* %s\n", ourport->baudclk->name); |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 1163 | } |
| 1164 | |
| 1165 | static DEVICE_ATTR(clock_source, S_IRUGO, s3c24xx_serial_show_clksrc, NULL); |
| 1166 | |
Thomas Abraham | 26c919e | 2011-11-06 22:10:44 +0530 | [diff] [blame] | 1167 | |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 1168 | /* Device driver serial port probe */ |
| 1169 | |
Thomas Abraham | 26c919e | 2011-11-06 22:10:44 +0530 | [diff] [blame] | 1170 | static const struct of_device_id s3c24xx_uart_dt_match[]; |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 1171 | static int probe_index; |
| 1172 | |
Thomas Abraham | 26c919e | 2011-11-06 22:10:44 +0530 | [diff] [blame] | 1173 | static inline struct s3c24xx_serial_drv_data *s3c24xx_get_driver_data( |
| 1174 | struct platform_device *pdev) |
| 1175 | { |
| 1176 | #ifdef CONFIG_OF |
| 1177 | if (pdev->dev.of_node) { |
| 1178 | const struct of_device_id *match; |
| 1179 | match = of_match_node(s3c24xx_uart_dt_match, pdev->dev.of_node); |
| 1180 | return (struct s3c24xx_serial_drv_data *)match->data; |
| 1181 | } |
| 1182 | #endif |
| 1183 | return (struct s3c24xx_serial_drv_data *) |
| 1184 | platform_get_device_id(pdev)->driver_data; |
| 1185 | } |
| 1186 | |
Thomas Abraham | da12150 | 2011-11-02 19:23:25 +0900 | [diff] [blame] | 1187 | static int s3c24xx_serial_probe(struct platform_device *pdev) |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 1188 | { |
| 1189 | struct s3c24xx_uart_port *ourport; |
| 1190 | int ret; |
| 1191 | |
Thomas Abraham | da12150 | 2011-11-02 19:23:25 +0900 | [diff] [blame] | 1192 | dbg("s3c24xx_serial_probe(%p) %d\n", pdev, probe_index); |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 1193 | |
| 1194 | ourport = &s3c24xx_serial_ports[probe_index]; |
Thomas Abraham | da12150 | 2011-11-02 19:23:25 +0900 | [diff] [blame] | 1195 | |
Thomas Abraham | 26c919e | 2011-11-06 22:10:44 +0530 | [diff] [blame] | 1196 | ourport->drv_data = s3c24xx_get_driver_data(pdev); |
| 1197 | if (!ourport->drv_data) { |
| 1198 | dev_err(&pdev->dev, "could not find driver data\n"); |
| 1199 | return -ENODEV; |
| 1200 | } |
Thomas Abraham | da12150 | 2011-11-02 19:23:25 +0900 | [diff] [blame] | 1201 | |
| 1202 | ourport->info = ourport->drv_data->info; |
| 1203 | ourport->cfg = (pdev->dev.platform_data) ? |
| 1204 | (struct s3c2410_uartcfg *)pdev->dev.platform_data : |
| 1205 | ourport->drv_data->def_cfg; |
| 1206 | |
| 1207 | ourport->port.fifosize = (ourport->info->fifosize) ? |
| 1208 | ourport->info->fifosize : |
| 1209 | ourport->drv_data->fifosize[probe_index]; |
| 1210 | |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 1211 | probe_index++; |
| 1212 | |
| 1213 | dbg("%s: initialising port %p...\n", __func__, ourport); |
| 1214 | |
Thomas Abraham | da12150 | 2011-11-02 19:23:25 +0900 | [diff] [blame] | 1215 | ret = s3c24xx_serial_init_port(ourport, pdev); |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 1216 | if (ret < 0) |
| 1217 | goto probe_err; |
| 1218 | |
| 1219 | dbg("%s: adding port\n", __func__); |
| 1220 | uart_add_one_port(&s3c24xx_uart_drv, &ourport->port); |
Thomas Abraham | da12150 | 2011-11-02 19:23:25 +0900 | [diff] [blame] | 1221 | platform_set_drvdata(pdev, &ourport->port); |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 1222 | |
Thomas Abraham | da12150 | 2011-11-02 19:23:25 +0900 | [diff] [blame] | 1223 | ret = device_create_file(&pdev->dev, &dev_attr_clock_source); |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 1224 | if (ret < 0) |
Thomas Abraham | da12150 | 2011-11-02 19:23:25 +0900 | [diff] [blame] | 1225 | dev_err(&pdev->dev, "failed to add clock source attr.\n"); |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 1226 | |
Ben Dooks | 3055547 | 2008-10-21 14:06:36 +0100 | [diff] [blame] | 1227 | ret = s3c24xx_serial_cpufreq_register(ourport); |
| 1228 | if (ret < 0) |
Thomas Abraham | da12150 | 2011-11-02 19:23:25 +0900 | [diff] [blame] | 1229 | dev_err(&pdev->dev, "failed to add cpufreq notifier\n"); |
Ben Dooks | 3055547 | 2008-10-21 14:06:36 +0100 | [diff] [blame] | 1230 | |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 1231 | return 0; |
| 1232 | |
| 1233 | probe_err: |
| 1234 | return ret; |
| 1235 | } |
| 1236 | |
Thomas Abraham | da12150 | 2011-11-02 19:23:25 +0900 | [diff] [blame] | 1237 | static int __devexit s3c24xx_serial_remove(struct platform_device *dev) |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 1238 | { |
| 1239 | struct uart_port *port = s3c24xx_dev_to_port(&dev->dev); |
| 1240 | |
| 1241 | if (port) { |
Ben Dooks | 3055547 | 2008-10-21 14:06:36 +0100 | [diff] [blame] | 1242 | s3c24xx_serial_cpufreq_deregister(to_ourport(port)); |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 1243 | device_remove_file(&dev->dev, &dev_attr_clock_source); |
| 1244 | uart_remove_one_port(&s3c24xx_uart_drv, port); |
| 1245 | } |
| 1246 | |
| 1247 | return 0; |
| 1248 | } |
| 1249 | |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 1250 | /* UART power management code */ |
MyungJoo Ham | aef7fe5 | 2011-06-29 15:28:24 +0900 | [diff] [blame] | 1251 | #ifdef CONFIG_PM_SLEEP |
| 1252 | static int s3c24xx_serial_suspend(struct device *dev) |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 1253 | { |
MyungJoo Ham | aef7fe5 | 2011-06-29 15:28:24 +0900 | [diff] [blame] | 1254 | struct uart_port *port = s3c24xx_dev_to_port(dev); |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 1255 | |
| 1256 | if (port) |
| 1257 | uart_suspend_port(&s3c24xx_uart_drv, port); |
| 1258 | |
| 1259 | return 0; |
| 1260 | } |
| 1261 | |
MyungJoo Ham | aef7fe5 | 2011-06-29 15:28:24 +0900 | [diff] [blame] | 1262 | static int s3c24xx_serial_resume(struct device *dev) |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 1263 | { |
MyungJoo Ham | aef7fe5 | 2011-06-29 15:28:24 +0900 | [diff] [blame] | 1264 | struct uart_port *port = s3c24xx_dev_to_port(dev); |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 1265 | struct s3c24xx_uart_port *ourport = to_ourport(port); |
| 1266 | |
| 1267 | if (port) { |
| 1268 | clk_enable(ourport->clk); |
| 1269 | s3c24xx_serial_resetport(port, s3c24xx_port_to_cfg(port)); |
| 1270 | clk_disable(ourport->clk); |
| 1271 | |
| 1272 | uart_resume_port(&s3c24xx_uart_drv, port); |
| 1273 | } |
| 1274 | |
| 1275 | return 0; |
| 1276 | } |
MyungJoo Ham | aef7fe5 | 2011-06-29 15:28:24 +0900 | [diff] [blame] | 1277 | |
| 1278 | static const struct dev_pm_ops s3c24xx_serial_pm_ops = { |
| 1279 | .suspend = s3c24xx_serial_suspend, |
| 1280 | .resume = s3c24xx_serial_resume, |
| 1281 | }; |
Kukjin Kim | b882fc1 | 2011-07-28 08:50:38 +0900 | [diff] [blame] | 1282 | #define SERIAL_SAMSUNG_PM_OPS (&s3c24xx_serial_pm_ops) |
| 1283 | |
MyungJoo Ham | aef7fe5 | 2011-06-29 15:28:24 +0900 | [diff] [blame] | 1284 | #else /* !CONFIG_PM_SLEEP */ |
Kukjin Kim | b882fc1 | 2011-07-28 08:50:38 +0900 | [diff] [blame] | 1285 | |
| 1286 | #define SERIAL_SAMSUNG_PM_OPS NULL |
MyungJoo Ham | aef7fe5 | 2011-06-29 15:28:24 +0900 | [diff] [blame] | 1287 | #endif /* CONFIG_PM_SLEEP */ |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 1288 | |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 1289 | /* Console code */ |
| 1290 | |
| 1291 | #ifdef CONFIG_SERIAL_SAMSUNG_CONSOLE |
| 1292 | |
| 1293 | static struct uart_port *cons_uart; |
| 1294 | |
| 1295 | static int |
| 1296 | s3c24xx_serial_console_txrdy(struct uart_port *port, unsigned int ufcon) |
| 1297 | { |
| 1298 | struct s3c24xx_uart_info *info = s3c24xx_port_to_info(port); |
| 1299 | unsigned long ufstat, utrstat; |
| 1300 | |
| 1301 | if (ufcon & S3C2410_UFCON_FIFOMODE) { |
Uwe Kleine-König | 9ddc5b6 | 2010-01-20 17:02:24 +0100 | [diff] [blame] | 1302 | /* fifo mode - check amount of data in fifo registers... */ |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 1303 | |
| 1304 | ufstat = rd_regl(port, S3C2410_UFSTAT); |
| 1305 | return (ufstat & info->tx_fifofull) ? 0 : 1; |
| 1306 | } |
| 1307 | |
| 1308 | /* in non-fifo mode, we go and use the tx buffer empty */ |
| 1309 | |
| 1310 | utrstat = rd_regl(port, S3C2410_UTRSTAT); |
| 1311 | return (utrstat & S3C2410_UTRSTAT_TXE) ? 1 : 0; |
| 1312 | } |
| 1313 | |
| 1314 | static void |
| 1315 | s3c24xx_serial_console_putchar(struct uart_port *port, int ch) |
| 1316 | { |
| 1317 | unsigned int ufcon = rd_regl(cons_uart, S3C2410_UFCON); |
| 1318 | while (!s3c24xx_serial_console_txrdy(port, ufcon)) |
| 1319 | barrier(); |
| 1320 | wr_regb(cons_uart, S3C2410_UTXH, ch); |
| 1321 | } |
| 1322 | |
| 1323 | static void |
| 1324 | s3c24xx_serial_console_write(struct console *co, const char *s, |
| 1325 | unsigned int count) |
| 1326 | { |
| 1327 | uart_console_write(cons_uart, s, count, s3c24xx_serial_console_putchar); |
| 1328 | } |
| 1329 | |
| 1330 | static void __init |
| 1331 | s3c24xx_serial_get_options(struct uart_port *port, int *baud, |
| 1332 | int *parity, int *bits) |
| 1333 | { |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 1334 | struct clk *clk; |
| 1335 | unsigned int ulcon; |
| 1336 | unsigned int ucon; |
| 1337 | unsigned int ubrdiv; |
| 1338 | unsigned long rate; |
Thomas Abraham | 5f5a7a5 | 2011-10-24 11:47:46 +0200 | [diff] [blame] | 1339 | unsigned int clk_sel; |
| 1340 | char clk_name[MAX_CLK_NAME_LENGTH]; |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 1341 | |
| 1342 | ulcon = rd_regl(port, S3C2410_ULCON); |
| 1343 | ucon = rd_regl(port, S3C2410_UCON); |
| 1344 | ubrdiv = rd_regl(port, S3C2410_UBRDIV); |
| 1345 | |
| 1346 | dbg("s3c24xx_serial_get_options: port=%p\n" |
| 1347 | "registers: ulcon=%08x, ucon=%08x, ubdriv=%08x\n", |
| 1348 | port, ulcon, ucon, ubrdiv); |
| 1349 | |
| 1350 | if ((ucon & 0xf) != 0) { |
| 1351 | /* consider the serial port configured if the tx/rx mode set */ |
| 1352 | |
| 1353 | switch (ulcon & S3C2410_LCON_CSMASK) { |
| 1354 | case S3C2410_LCON_CS5: |
| 1355 | *bits = 5; |
| 1356 | break; |
| 1357 | case S3C2410_LCON_CS6: |
| 1358 | *bits = 6; |
| 1359 | break; |
| 1360 | case S3C2410_LCON_CS7: |
| 1361 | *bits = 7; |
| 1362 | break; |
| 1363 | default: |
| 1364 | case S3C2410_LCON_CS8: |
| 1365 | *bits = 8; |
| 1366 | break; |
| 1367 | } |
| 1368 | |
| 1369 | switch (ulcon & S3C2410_LCON_PMASK) { |
| 1370 | case S3C2410_LCON_PEVEN: |
| 1371 | *parity = 'e'; |
| 1372 | break; |
| 1373 | |
| 1374 | case S3C2410_LCON_PODD: |
| 1375 | *parity = 'o'; |
| 1376 | break; |
| 1377 | |
| 1378 | case S3C2410_LCON_PNONE: |
| 1379 | default: |
| 1380 | *parity = 'n'; |
| 1381 | } |
| 1382 | |
| 1383 | /* now calculate the baud rate */ |
| 1384 | |
Thomas Abraham | 5f5a7a5 | 2011-10-24 11:47:46 +0200 | [diff] [blame] | 1385 | clk_sel = s3c24xx_serial_getsource(port); |
| 1386 | sprintf(clk_name, "clk_uart_baud%d", clk_sel); |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 1387 | |
Thomas Abraham | 5f5a7a5 | 2011-10-24 11:47:46 +0200 | [diff] [blame] | 1388 | clk = clk_get(port->dev, clk_name); |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 1389 | if (!IS_ERR(clk) && clk != NULL) |
Thomas Abraham | 5f5a7a5 | 2011-10-24 11:47:46 +0200 | [diff] [blame] | 1390 | rate = clk_get_rate(clk); |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 1391 | else |
| 1392 | rate = 1; |
| 1393 | |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 1394 | *baud = rate / (16 * (ubrdiv + 1)); |
| 1395 | dbg("calculated baud %d\n", *baud); |
| 1396 | } |
| 1397 | |
| 1398 | } |
| 1399 | |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 1400 | static int __init |
| 1401 | s3c24xx_serial_console_setup(struct console *co, char *options) |
| 1402 | { |
| 1403 | struct uart_port *port; |
| 1404 | int baud = 9600; |
| 1405 | int bits = 8; |
| 1406 | int parity = 'n'; |
| 1407 | int flow = 'n'; |
| 1408 | |
| 1409 | dbg("s3c24xx_serial_console_setup: co=%p (%d), %s\n", |
| 1410 | co, co->index, options); |
| 1411 | |
| 1412 | /* is this a valid port */ |
| 1413 | |
Ben Dooks | 03d5e77 | 2008-11-03 09:21:23 +0000 | [diff] [blame] | 1414 | if (co->index == -1 || co->index >= CONFIG_SERIAL_SAMSUNG_UARTS) |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 1415 | co->index = 0; |
| 1416 | |
| 1417 | port = &s3c24xx_serial_ports[co->index].port; |
| 1418 | |
| 1419 | /* is the port configured? */ |
| 1420 | |
Thomas Abraham | ee430f1 | 2011-06-14 19:12:26 +0900 | [diff] [blame] | 1421 | if (port->mapbase == 0x0) |
| 1422 | return -ENODEV; |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 1423 | |
| 1424 | cons_uart = port; |
| 1425 | |
| 1426 | dbg("s3c24xx_serial_console_setup: port=%p (%d)\n", port, co->index); |
| 1427 | |
| 1428 | /* |
| 1429 | * Check whether an invalid uart number has been specified, and |
| 1430 | * if so, search for the first available port that does have |
| 1431 | * console support. |
| 1432 | */ |
| 1433 | if (options) |
| 1434 | uart_parse_options(options, &baud, &parity, &bits, &flow); |
| 1435 | else |
| 1436 | s3c24xx_serial_get_options(port, &baud, &parity, &bits); |
| 1437 | |
| 1438 | dbg("s3c24xx_serial_console_setup: baud %d\n", baud); |
| 1439 | |
| 1440 | return uart_set_options(port, co, baud, parity, bits, flow); |
| 1441 | } |
| 1442 | |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 1443 | static struct console s3c24xx_serial_console = { |
| 1444 | .name = S3C24XX_SERIAL_NAME, |
| 1445 | .device = uart_console_device, |
| 1446 | .flags = CON_PRINTBUFFER, |
| 1447 | .index = -1, |
| 1448 | .write = s3c24xx_serial_console_write, |
Thomas Abraham | 5822a5d | 2011-06-14 19:12:26 +0900 | [diff] [blame] | 1449 | .setup = s3c24xx_serial_console_setup, |
| 1450 | .data = &s3c24xx_uart_drv, |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 1451 | }; |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 1452 | #endif /* CONFIG_SERIAL_SAMSUNG_CONSOLE */ |
| 1453 | |
Thomas Abraham | da12150 | 2011-11-02 19:23:25 +0900 | [diff] [blame] | 1454 | #ifdef CONFIG_CPU_S3C2410 |
| 1455 | static struct s3c24xx_serial_drv_data s3c2410_serial_drv_data = { |
| 1456 | .info = &(struct s3c24xx_uart_info) { |
| 1457 | .name = "Samsung S3C2410 UART", |
| 1458 | .type = PORT_S3C2410, |
| 1459 | .fifosize = 16, |
| 1460 | .rx_fifomask = S3C2410_UFSTAT_RXMASK, |
| 1461 | .rx_fifoshift = S3C2410_UFSTAT_RXSHIFT, |
| 1462 | .rx_fifofull = S3C2410_UFSTAT_RXFULL, |
| 1463 | .tx_fifofull = S3C2410_UFSTAT_TXFULL, |
| 1464 | .tx_fifomask = S3C2410_UFSTAT_TXMASK, |
| 1465 | .tx_fifoshift = S3C2410_UFSTAT_TXSHIFT, |
| 1466 | .def_clk_sel = S3C2410_UCON_CLKSEL0, |
| 1467 | .num_clks = 2, |
| 1468 | .clksel_mask = S3C2410_UCON_CLKMASK, |
| 1469 | .clksel_shift = S3C2410_UCON_CLKSHIFT, |
| 1470 | }, |
| 1471 | .def_cfg = &(struct s3c2410_uartcfg) { |
| 1472 | .ucon = S3C2410_UCON_DEFAULT, |
| 1473 | .ufcon = S3C2410_UFCON_DEFAULT, |
| 1474 | }, |
| 1475 | }; |
| 1476 | #define S3C2410_SERIAL_DRV_DATA ((kernel_ulong_t)&s3c2410_serial_drv_data) |
| 1477 | #else |
| 1478 | #define S3C2410_SERIAL_DRV_DATA (kernel_ulong_t)NULL |
| 1479 | #endif |
| 1480 | |
| 1481 | #ifdef CONFIG_CPU_S3C2412 |
| 1482 | static struct s3c24xx_serial_drv_data s3c2412_serial_drv_data = { |
| 1483 | .info = &(struct s3c24xx_uart_info) { |
| 1484 | .name = "Samsung S3C2412 UART", |
| 1485 | .type = PORT_S3C2412, |
| 1486 | .fifosize = 64, |
| 1487 | .has_divslot = 1, |
| 1488 | .rx_fifomask = S3C2440_UFSTAT_RXMASK, |
| 1489 | .rx_fifoshift = S3C2440_UFSTAT_RXSHIFT, |
| 1490 | .rx_fifofull = S3C2440_UFSTAT_RXFULL, |
| 1491 | .tx_fifofull = S3C2440_UFSTAT_TXFULL, |
| 1492 | .tx_fifomask = S3C2440_UFSTAT_TXMASK, |
| 1493 | .tx_fifoshift = S3C2440_UFSTAT_TXSHIFT, |
| 1494 | .def_clk_sel = S3C2410_UCON_CLKSEL2, |
| 1495 | .num_clks = 4, |
| 1496 | .clksel_mask = S3C2412_UCON_CLKMASK, |
| 1497 | .clksel_shift = S3C2412_UCON_CLKSHIFT, |
| 1498 | }, |
| 1499 | .def_cfg = &(struct s3c2410_uartcfg) { |
| 1500 | .ucon = S3C2410_UCON_DEFAULT, |
| 1501 | .ufcon = S3C2410_UFCON_DEFAULT, |
| 1502 | }, |
| 1503 | }; |
| 1504 | #define S3C2412_SERIAL_DRV_DATA ((kernel_ulong_t)&s3c2412_serial_drv_data) |
| 1505 | #else |
| 1506 | #define S3C2412_SERIAL_DRV_DATA (kernel_ulong_t)NULL |
| 1507 | #endif |
| 1508 | |
| 1509 | #if defined(CONFIG_CPU_S3C2440) || defined(CONFIG_CPU_S3C2416) || \ |
Denis 'GNUtoo' Carikli | b26469a | 2012-02-23 08:23:52 +0100 | [diff] [blame] | 1510 | defined(CONFIG_CPU_S3C2443) || defined(CONFIG_CPU_S3C2442) |
Thomas Abraham | da12150 | 2011-11-02 19:23:25 +0900 | [diff] [blame] | 1511 | static struct s3c24xx_serial_drv_data s3c2440_serial_drv_data = { |
| 1512 | .info = &(struct s3c24xx_uart_info) { |
| 1513 | .name = "Samsung S3C2440 UART", |
| 1514 | .type = PORT_S3C2440, |
| 1515 | .fifosize = 64, |
| 1516 | .has_divslot = 1, |
| 1517 | .rx_fifomask = S3C2440_UFSTAT_RXMASK, |
| 1518 | .rx_fifoshift = S3C2440_UFSTAT_RXSHIFT, |
| 1519 | .rx_fifofull = S3C2440_UFSTAT_RXFULL, |
| 1520 | .tx_fifofull = S3C2440_UFSTAT_TXFULL, |
| 1521 | .tx_fifomask = S3C2440_UFSTAT_TXMASK, |
| 1522 | .tx_fifoshift = S3C2440_UFSTAT_TXSHIFT, |
| 1523 | .def_clk_sel = S3C2410_UCON_CLKSEL2, |
| 1524 | .num_clks = 4, |
| 1525 | .clksel_mask = S3C2412_UCON_CLKMASK, |
| 1526 | .clksel_shift = S3C2412_UCON_CLKSHIFT, |
| 1527 | }, |
| 1528 | .def_cfg = &(struct s3c2410_uartcfg) { |
| 1529 | .ucon = S3C2410_UCON_DEFAULT, |
| 1530 | .ufcon = S3C2410_UFCON_DEFAULT, |
| 1531 | }, |
| 1532 | }; |
| 1533 | #define S3C2440_SERIAL_DRV_DATA ((kernel_ulong_t)&s3c2440_serial_drv_data) |
| 1534 | #else |
| 1535 | #define S3C2440_SERIAL_DRV_DATA (kernel_ulong_t)NULL |
| 1536 | #endif |
| 1537 | |
| 1538 | #if defined(CONFIG_CPU_S3C6400) || defined(CONFIG_CPU_S3C6410) || \ |
| 1539 | defined(CONFIG_CPU_S5P6440) || defined(CONFIG_CPU_S5P6450) || \ |
| 1540 | defined(CONFIG_CPU_S5PC100) |
| 1541 | static struct s3c24xx_serial_drv_data s3c6400_serial_drv_data = { |
| 1542 | .info = &(struct s3c24xx_uart_info) { |
| 1543 | .name = "Samsung S3C6400 UART", |
| 1544 | .type = PORT_S3C6400, |
| 1545 | .fifosize = 64, |
| 1546 | .has_divslot = 1, |
| 1547 | .rx_fifomask = S3C2440_UFSTAT_RXMASK, |
| 1548 | .rx_fifoshift = S3C2440_UFSTAT_RXSHIFT, |
| 1549 | .rx_fifofull = S3C2440_UFSTAT_RXFULL, |
| 1550 | .tx_fifofull = S3C2440_UFSTAT_TXFULL, |
| 1551 | .tx_fifomask = S3C2440_UFSTAT_TXMASK, |
| 1552 | .tx_fifoshift = S3C2440_UFSTAT_TXSHIFT, |
| 1553 | .def_clk_sel = S3C2410_UCON_CLKSEL2, |
| 1554 | .num_clks = 4, |
| 1555 | .clksel_mask = S3C6400_UCON_CLKMASK, |
| 1556 | .clksel_shift = S3C6400_UCON_CLKSHIFT, |
| 1557 | }, |
| 1558 | .def_cfg = &(struct s3c2410_uartcfg) { |
| 1559 | .ucon = S3C2410_UCON_DEFAULT, |
| 1560 | .ufcon = S3C2410_UFCON_DEFAULT, |
| 1561 | }, |
| 1562 | }; |
| 1563 | #define S3C6400_SERIAL_DRV_DATA ((kernel_ulong_t)&s3c6400_serial_drv_data) |
| 1564 | #else |
| 1565 | #define S3C6400_SERIAL_DRV_DATA (kernel_ulong_t)NULL |
| 1566 | #endif |
| 1567 | |
| 1568 | #ifdef CONFIG_CPU_S5PV210 |
| 1569 | static struct s3c24xx_serial_drv_data s5pv210_serial_drv_data = { |
| 1570 | .info = &(struct s3c24xx_uart_info) { |
| 1571 | .name = "Samsung S5PV210 UART", |
| 1572 | .type = PORT_S3C6400, |
| 1573 | .has_divslot = 1, |
| 1574 | .rx_fifomask = S5PV210_UFSTAT_RXMASK, |
| 1575 | .rx_fifoshift = S5PV210_UFSTAT_RXSHIFT, |
| 1576 | .rx_fifofull = S5PV210_UFSTAT_RXFULL, |
| 1577 | .tx_fifofull = S5PV210_UFSTAT_TXFULL, |
| 1578 | .tx_fifomask = S5PV210_UFSTAT_TXMASK, |
| 1579 | .tx_fifoshift = S5PV210_UFSTAT_TXSHIFT, |
| 1580 | .def_clk_sel = S3C2410_UCON_CLKSEL0, |
| 1581 | .num_clks = 2, |
| 1582 | .clksel_mask = S5PV210_UCON_CLKMASK, |
| 1583 | .clksel_shift = S5PV210_UCON_CLKSHIFT, |
| 1584 | }, |
| 1585 | .def_cfg = &(struct s3c2410_uartcfg) { |
| 1586 | .ucon = S5PV210_UCON_DEFAULT, |
| 1587 | .ufcon = S5PV210_UFCON_DEFAULT, |
| 1588 | }, |
| 1589 | .fifosize = { 256, 64, 16, 16 }, |
| 1590 | }; |
| 1591 | #define S5PV210_SERIAL_DRV_DATA ((kernel_ulong_t)&s5pv210_serial_drv_data) |
| 1592 | #else |
| 1593 | #define S5PV210_SERIAL_DRV_DATA (kernel_ulong_t)NULL |
| 1594 | #endif |
| 1595 | |
Kukjin Kim | 5f7b6d1 | 2012-02-01 00:11:23 +0900 | [diff] [blame] | 1596 | #if defined(CONFIG_CPU_EXYNOS4210) || defined(CONFIG_SOC_EXYNOS4212) || \ |
Kukjin Kim | 7ccfe01 | 2012-02-01 00:39:11 +0900 | [diff] [blame] | 1597 | defined(CONFIG_SOC_EXYNOS4412) || defined(CONFIG_SOC_EXYNOS5250) |
Thomas Abraham | da12150 | 2011-11-02 19:23:25 +0900 | [diff] [blame] | 1598 | static struct s3c24xx_serial_drv_data exynos4210_serial_drv_data = { |
| 1599 | .info = &(struct s3c24xx_uart_info) { |
| 1600 | .name = "Samsung Exynos4 UART", |
| 1601 | .type = PORT_S3C6400, |
| 1602 | .has_divslot = 1, |
| 1603 | .rx_fifomask = S5PV210_UFSTAT_RXMASK, |
| 1604 | .rx_fifoshift = S5PV210_UFSTAT_RXSHIFT, |
| 1605 | .rx_fifofull = S5PV210_UFSTAT_RXFULL, |
| 1606 | .tx_fifofull = S5PV210_UFSTAT_TXFULL, |
| 1607 | .tx_fifomask = S5PV210_UFSTAT_TXMASK, |
| 1608 | .tx_fifoshift = S5PV210_UFSTAT_TXSHIFT, |
| 1609 | .def_clk_sel = S3C2410_UCON_CLKSEL0, |
| 1610 | .num_clks = 1, |
| 1611 | .clksel_mask = 0, |
| 1612 | .clksel_shift = 0, |
| 1613 | }, |
| 1614 | .def_cfg = &(struct s3c2410_uartcfg) { |
| 1615 | .ucon = S5PV210_UCON_DEFAULT, |
| 1616 | .ufcon = S5PV210_UFCON_DEFAULT, |
| 1617 | .has_fracval = 1, |
| 1618 | }, |
| 1619 | .fifosize = { 256, 64, 16, 16 }, |
| 1620 | }; |
| 1621 | #define EXYNOS4210_SERIAL_DRV_DATA ((kernel_ulong_t)&exynos4210_serial_drv_data) |
| 1622 | #else |
| 1623 | #define EXYNOS4210_SERIAL_DRV_DATA (kernel_ulong_t)NULL |
| 1624 | #endif |
| 1625 | |
| 1626 | static struct platform_device_id s3c24xx_serial_driver_ids[] = { |
| 1627 | { |
| 1628 | .name = "s3c2410-uart", |
| 1629 | .driver_data = S3C2410_SERIAL_DRV_DATA, |
| 1630 | }, { |
| 1631 | .name = "s3c2412-uart", |
| 1632 | .driver_data = S3C2412_SERIAL_DRV_DATA, |
| 1633 | }, { |
| 1634 | .name = "s3c2440-uart", |
| 1635 | .driver_data = S3C2440_SERIAL_DRV_DATA, |
| 1636 | }, { |
| 1637 | .name = "s3c6400-uart", |
| 1638 | .driver_data = S3C6400_SERIAL_DRV_DATA, |
| 1639 | }, { |
| 1640 | .name = "s5pv210-uart", |
| 1641 | .driver_data = S5PV210_SERIAL_DRV_DATA, |
| 1642 | }, { |
| 1643 | .name = "exynos4210-uart", |
| 1644 | .driver_data = EXYNOS4210_SERIAL_DRV_DATA, |
| 1645 | }, |
| 1646 | { }, |
| 1647 | }; |
| 1648 | MODULE_DEVICE_TABLE(platform, s3c24xx_serial_driver_ids); |
| 1649 | |
Thomas Abraham | 26c919e | 2011-11-06 22:10:44 +0530 | [diff] [blame] | 1650 | #ifdef CONFIG_OF |
| 1651 | static const struct of_device_id s3c24xx_uart_dt_match[] = { |
| 1652 | { .compatible = "samsung,exynos4210-uart", |
Mark Brown | a169a88 | 2011-11-08 17:00:14 +0900 | [diff] [blame] | 1653 | .data = (void *)EXYNOS4210_SERIAL_DRV_DATA }, |
Thomas Abraham | 26c919e | 2011-11-06 22:10:44 +0530 | [diff] [blame] | 1654 | {}, |
| 1655 | }; |
| 1656 | MODULE_DEVICE_TABLE(of, s3c24xx_uart_dt_match); |
| 1657 | #else |
| 1658 | #define s3c24xx_uart_dt_match NULL |
| 1659 | #endif |
| 1660 | |
Thomas Abraham | da12150 | 2011-11-02 19:23:25 +0900 | [diff] [blame] | 1661 | static struct platform_driver samsung_serial_driver = { |
| 1662 | .probe = s3c24xx_serial_probe, |
| 1663 | .remove = __devexit_p(s3c24xx_serial_remove), |
| 1664 | .id_table = s3c24xx_serial_driver_ids, |
| 1665 | .driver = { |
| 1666 | .name = "samsung-uart", |
| 1667 | .owner = THIS_MODULE, |
| 1668 | .pm = SERIAL_SAMSUNG_PM_OPS, |
Thomas Abraham | 26c919e | 2011-11-06 22:10:44 +0530 | [diff] [blame] | 1669 | .of_match_table = s3c24xx_uart_dt_match, |
Thomas Abraham | da12150 | 2011-11-02 19:23:25 +0900 | [diff] [blame] | 1670 | }, |
| 1671 | }; |
| 1672 | |
| 1673 | /* module initialisation code */ |
| 1674 | |
| 1675 | static int __init s3c24xx_serial_modinit(void) |
| 1676 | { |
| 1677 | int ret; |
| 1678 | |
| 1679 | ret = uart_register_driver(&s3c24xx_uart_drv); |
| 1680 | if (ret < 0) { |
| 1681 | printk(KERN_ERR "failed to register UART driver\n"); |
| 1682 | return -1; |
| 1683 | } |
| 1684 | |
| 1685 | return platform_driver_register(&samsung_serial_driver); |
| 1686 | } |
| 1687 | |
| 1688 | static void __exit s3c24xx_serial_modexit(void) |
| 1689 | { |
| 1690 | uart_unregister_driver(&s3c24xx_uart_drv); |
| 1691 | } |
| 1692 | |
| 1693 | module_init(s3c24xx_serial_modinit); |
| 1694 | module_exit(s3c24xx_serial_modexit); |
| 1695 | |
| 1696 | MODULE_ALIAS("platform:samsung-uart"); |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 1697 | MODULE_DESCRIPTION("Samsung SoC Serial port driver"); |
| 1698 | MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>"); |
| 1699 | MODULE_LICENSE("GPL v2"); |