2 * linux/drivers/serial/s3c2410.c
4 * Driver for onboard UARTs on the Samsung S3C24XX
6 * Based on drivers/char/serial.c and drivers/char/21285.c
8 * Ben Dooks, (c) 2003-2005 Simtec Electronics
9 * http://www.simtec.co.uk/products/SWLINUX/
13 * 22-Jul-2004 BJD Finished off device rewrite
15 * 21-Jul-2004 BJD Thanks to <herbet@13thfloor.at> for pointing out
16 * problems with baud rate and loss of IR settings. Update
17 * to add configuration via platform_device structure
19 * 28-Sep-2004 BJD Re-write for the following items
20 * - S3C2410 and S3C2440 serial support
21 * - Power Management support
22 * - Fix console via IrDA devices
23 * - SysReq (Herbert Pötzl)
24 * - Break character handling (Herbert Pötzl)
25 * - spin-lock initialisation (Dimitry Andric)
26 * - added clock control
27 * - updated init code to use platform_device info
29 * 06-Mar-2005 BJD Add s3c2440 fclk clock source
31 * 09-Mar-2005 BJD Add s3c2400 support
33 * 10-Mar-2005 LCVR Changed S3C2410_VA_UART to S3C24XX_VA_UART
36 /* Note on 2440 fclk clock source handling
38 * Whilst it is possible to use the fclk as clock source, the method
39 * of properly switching too/from this is currently un-implemented, so
40 * whichever way is configured at startup is the one that will be used.
43 /* Hote on 2410 error handling
45 * The s3c2410 manual has a love/hate affair with the contents of the
46 * UERSTAT register in the UART blocks, and keeps marking some of the
47 * error bits as reserved. Having checked with the s3c2410x01,
48 * it copes with BREAKs properly, so I am happy to ignore the RESERVED
49 * feature from the latter versions of the manual.
51 * If it becomes aparrent that latter versions of the 2410 remove these
52 * bits, then action will have to be taken to differentiate the versions
53 * and change the policy on BREAK
58 #include <linux/config.h>
60 #if defined(CONFIG_SERIAL_S3C2410_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
64 #include <linux/module.h>
65 #include <linux/ioport.h>
66 #include <linux/device.h>
67 #include <linux/init.h>
68 #include <linux/sysrq.h>
69 #include <linux/console.h>
70 #include <linux/tty.h>
71 #include <linux/tty_flip.h>
72 #include <linux/serial_core.h>
73 #include <linux/serial.h>
74 #include <linux/delay.h>
79 #include <asm/hardware.h>
80 #include <asm/hardware/clock.h>
82 #include <asm/arch/regs-serial.h>
83 #include <asm/arch/regs-gpio.h>
85 #include <asm/mach-types.h>
89 struct s3c24xx_uart_info {
92 unsigned int fifosize;
93 unsigned long rx_fifomask;
94 unsigned long rx_fifoshift;
95 unsigned long rx_fifofull;
96 unsigned long tx_fifomask;
97 unsigned long tx_fifoshift;
98 unsigned long tx_fifofull;
100 /* clock source control */
102 int (*get_clksrc)(struct uart_port *, struct s3c24xx_uart_clksrc *clk);
103 int (*set_clksrc)(struct uart_port *, struct s3c24xx_uart_clksrc *clk);
106 int (*reset_port)(struct uart_port *, struct s3c2410_uartcfg *);
109 struct s3c24xx_uart_port {
110 unsigned char rx_claimed;
111 unsigned char tx_claimed;
113 struct s3c24xx_uart_info *info;
114 struct s3c24xx_uart_clksrc *clksrc;
117 struct uart_port port;
121 /* configuration defines */
125 /* send debug to the low-level output routines */
127 extern void printascii(const char *);
130 s3c24xx_serial_dbg(const char *fmt, ...)
136 vsprintf(buff, fmt, va);
142 #define dbg(x...) s3c24xx_serial_dbg(x)
145 #define dbg(x...) printk(KERN_DEBUG "s3c24xx: ");
148 #define dbg(x...) do {} while(0)
151 /* UART name and device definitions */
153 #define S3C24XX_SERIAL_NAME "ttySAC"
154 #define S3C24XX_SERIAL_DEVFS "tts/"
155 #define S3C24XX_SERIAL_MAJOR 204
156 #define S3C24XX_SERIAL_MINOR 64
159 /* conversion functions */
161 #define s3c24xx_dev_to_port(__dev) (struct uart_port *)dev_get_drvdata(__dev)
162 #define s3c24xx_dev_to_cfg(__dev) (struct s3c2410_uartcfg *)((__dev)->platform_data)
164 /* we can support 3 uarts, but not always use them */
168 /* port irq numbers */
170 #define TX_IRQ(port) ((port)->irq + 1)
171 #define RX_IRQ(port) ((port)->irq)
173 /* register access controls */
175 #define portaddr(port, reg) ((port)->membase + (reg))
177 #define rd_regb(port, reg) (__raw_readb(portaddr(port, reg)))
178 #define rd_regl(port, reg) (__raw_readl(portaddr(port, reg)))
180 #define wr_regb(port, reg, val) \
181 do { __raw_writeb(val, portaddr(port, reg)); } while(0)
183 #define wr_regl(port, reg, val) \
184 do { __raw_writel(val, portaddr(port, reg)); } while(0)
186 /* macros to change one thing to another */
188 #define tx_enabled(port) ((port)->unused[0])
189 #define rx_enabled(port) ((port)->unused[1])
191 /* flag to ignore all characters comming in */
192 #define RXSTAT_DUMMY_READ (0x10000000)
194 static inline struct s3c24xx_uart_port *to_ourport(struct uart_port *port)
196 return container_of(port, struct s3c24xx_uart_port, port);
199 /* translate a port to the device name */
201 static inline const char *s3c24xx_serial_portname(struct uart_port *port)
203 return to_platform_device(port->dev)->name;
206 static int s3c24xx_serial_txempty_nofifo(struct uart_port *port)
208 return (rd_regl(port, S3C2410_UTRSTAT) & S3C2410_UTRSTAT_TXE);
211 static void s3c24xx_serial_rx_enable(struct uart_port *port)
214 unsigned int ucon, ufcon;
217 spin_lock_irqsave(&port->lock, flags);
219 while (--count && !s3c24xx_serial_txempty_nofifo(port))
222 ufcon = rd_regl(port, S3C2410_UFCON);
223 ufcon |= S3C2410_UFCON_RESETRX;
224 wr_regl(port, S3C2410_UFCON, ufcon);
226 ucon = rd_regl(port, S3C2410_UCON);
227 ucon |= S3C2410_UCON_RXIRQMODE;
228 wr_regl(port, S3C2410_UCON, ucon);
230 rx_enabled(port) = 1;
231 spin_unlock_irqrestore(&port->lock, flags);
234 static void s3c24xx_serial_rx_disable(struct uart_port *port)
239 spin_lock_irqsave(&port->lock, flags);
241 ucon = rd_regl(port, S3C2410_UCON);
242 ucon &= ~S3C2410_UCON_RXIRQMODE;
243 wr_regl(port, S3C2410_UCON, ucon);
245 rx_enabled(port) = 0;
246 spin_unlock_irqrestore(&port->lock, flags);
250 s3c24xx_serial_stop_tx(struct uart_port *port, unsigned int tty_stop)
252 if (tx_enabled(port)) {
253 disable_irq(TX_IRQ(port));
254 tx_enabled(port) = 0;
255 if (port->flags & UPF_CONS_FLOW)
256 s3c24xx_serial_rx_enable(port);
261 s3c24xx_serial_start_tx(struct uart_port *port, unsigned int tty_start)
263 if (!tx_enabled(port)) {
264 if (port->flags & UPF_CONS_FLOW)
265 s3c24xx_serial_rx_disable(port);
267 enable_irq(TX_IRQ(port));
268 tx_enabled(port) = 1;
273 static void s3c24xx_serial_stop_rx(struct uart_port *port)
275 if (rx_enabled(port)) {
276 dbg("s3c24xx_serial_stop_rx: port=%p\n", port);
277 disable_irq(RX_IRQ(port));
278 rx_enabled(port) = 0;
282 static void s3c24xx_serial_enable_ms(struct uart_port *port)
286 static inline struct s3c24xx_uart_info *s3c24xx_port_to_info(struct uart_port *port)
288 return to_ourport(port)->info;
291 static inline struct s3c2410_uartcfg *s3c24xx_port_to_cfg(struct uart_port *port)
293 if (port->dev == NULL)
296 return (struct s3c2410_uartcfg *)port->dev->platform_data;
299 static int s3c24xx_serial_rx_fifocnt(struct s3c24xx_uart_port *ourport,
300 unsigned long ufstat)
302 struct s3c24xx_uart_info *info = ourport->info;
304 if (ufstat & info->rx_fifofull)
305 return info->fifosize;
307 return (ufstat & info->rx_fifomask) >> info->rx_fifoshift;
311 /* ? - where has parity gone?? */
312 #define S3C2410_UERSTAT_PARITY (0x1000)
315 s3c24xx_serial_rx_chars(int irq, void *dev_id, struct pt_regs *regs)
317 struct s3c24xx_uart_port *ourport = dev_id;
318 struct uart_port *port = &ourport->port;
319 struct tty_struct *tty = port->info->tty;
320 unsigned int ufcon, ch, flag, ufstat, uerstat;
323 while (max_count-- > 0) {
324 ufcon = rd_regl(port, S3C2410_UFCON);
325 ufstat = rd_regl(port, S3C2410_UFSTAT);
327 if (s3c24xx_serial_rx_fifocnt(ourport, ufstat) == 0)
330 if (tty->flip.count >= TTY_FLIPBUF_SIZE) {
331 if (tty->low_latency)
332 tty_flip_buffer_push(tty);
335 * If this failed then we will throw away the
336 * bytes but must do so to clear interrupts
340 uerstat = rd_regl(port, S3C2410_UERSTAT);
341 ch = rd_regb(port, S3C2410_URXH);
343 if (port->flags & UPF_CONS_FLOW) {
344 int txe = s3c24xx_serial_txempty_nofifo(port);
346 if (rx_enabled(port)) {
348 rx_enabled(port) = 0;
353 ufcon |= S3C2410_UFCON_RESETRX;
354 wr_regl(port, S3C2410_UFCON, ufcon);
355 rx_enabled(port) = 1;
362 /* insert the character into the buffer */
367 if (unlikely(uerstat & S3C2410_UERSTAT_ANY)) {
368 dbg("rxerr: port ch=0x%02x, rxs=0x%08x\n",
371 /* check for break */
372 if (uerstat & S3C2410_UERSTAT_BREAK) {
375 if (uart_handle_break(port))
379 if (uerstat & S3C2410_UERSTAT_FRAME)
380 port->icount.frame++;
381 if (uerstat & S3C2410_UERSTAT_OVERRUN)
382 port->icount.overrun++;
384 uerstat &= port->read_status_mask;
386 if (uerstat & S3C2410_UERSTAT_BREAK)
388 else if (uerstat & S3C2410_UERSTAT_PARITY)
390 else if (uerstat & ( S3C2410_UERSTAT_FRAME | S3C2410_UERSTAT_OVERRUN))
394 if (uart_handle_sysrq_char(port, ch, regs))
397 uart_insert_char(port, uerstat, S3C2410_UERSTAT_OVERRUN, ch, flag);
402 tty_flip_buffer_push(tty);
408 static irqreturn_t s3c24xx_serial_tx_chars(int irq, void *id, struct pt_regs *regs)
410 struct s3c24xx_uart_port *ourport = id;
411 struct uart_port *port = &ourport->port;
412 struct circ_buf *xmit = &port->info->xmit;
416 wr_regb(port, S3C2410_UTXH, port->x_char);
422 /* if there isnt anything more to transmit, or the uart is now
423 * stopped, disable the uart and exit
426 if (uart_circ_empty(xmit) || uart_tx_stopped(port)) {
427 s3c24xx_serial_stop_tx(port, 0);
431 /* try and drain the buffer... */
433 while (!uart_circ_empty(xmit) && count-- > 0) {
434 if (rd_regl(port, S3C2410_UFSTAT) & ourport->info->tx_fifofull)
437 wr_regb(port, S3C2410_UTXH, xmit->buf[xmit->tail]);
438 xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
442 if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
443 uart_write_wakeup(port);
445 if (uart_circ_empty(xmit))
446 s3c24xx_serial_stop_tx(port, 0);
452 static unsigned int s3c24xx_serial_tx_empty(struct uart_port *port)
454 struct s3c24xx_uart_info *info = s3c24xx_port_to_info(port);
455 unsigned long ufstat = rd_regl(port, S3C2410_UFSTAT);
456 unsigned long ufcon = rd_regl(port, S3C2410_UFCON);
458 if (ufcon & S3C2410_UFCON_FIFOMODE) {
459 if ((ufstat & info->tx_fifomask) != 0 ||
460 (ufstat & info->tx_fifofull))
466 return s3c24xx_serial_txempty_nofifo(port);
469 /* no modem control lines */
470 static unsigned int s3c24xx_serial_get_mctrl(struct uart_port *port)
472 unsigned int umstat = rd_regb(port,S3C2410_UMSTAT);
474 if (umstat & S3C2410_UMSTAT_CTS)
475 return TIOCM_CAR | TIOCM_DSR | TIOCM_CTS;
477 return TIOCM_CAR | TIOCM_DSR;
480 static void s3c24xx_serial_set_mctrl(struct uart_port *port, unsigned int mctrl)
482 /* todo - possibly remove AFC and do manual CTS */
485 static void s3c24xx_serial_break_ctl(struct uart_port *port, int break_state)
490 spin_lock_irqsave(&port->lock, flags);
492 ucon = rd_regl(port, S3C2410_UCON);
495 ucon |= S3C2410_UCON_SBREAK;
497 ucon &= ~S3C2410_UCON_SBREAK;
499 wr_regl(port, S3C2410_UCON, ucon);
501 spin_unlock_irqrestore(&port->lock, flags);
504 static void s3c24xx_serial_shutdown(struct uart_port *port)
506 struct s3c24xx_uart_port *ourport = to_ourport(port);
508 if (ourport->tx_claimed) {
509 free_irq(TX_IRQ(port), ourport);
510 tx_enabled(port) = 0;
511 ourport->tx_claimed = 0;
514 if (ourport->rx_claimed) {
515 free_irq(RX_IRQ(port), ourport);
516 ourport->rx_claimed = 0;
517 rx_enabled(port) = 0;
522 static int s3c24xx_serial_startup(struct uart_port *port)
524 struct s3c24xx_uart_port *ourport = to_ourport(port);
527 dbg("s3c24xx_serial_startup: port=%p (%08lx,%p)\n",
528 port->mapbase, port->membase);
530 rx_enabled(port) = 1;
532 ret = request_irq(RX_IRQ(port),
533 s3c24xx_serial_rx_chars, 0,
534 s3c24xx_serial_portname(port), ourport);
537 printk(KERN_ERR "cannot get irq %d\n", RX_IRQ(port));
541 ourport->rx_claimed = 1;
543 dbg("requesting tx irq...\n");
545 tx_enabled(port) = 1;
547 ret = request_irq(TX_IRQ(port),
548 s3c24xx_serial_tx_chars, 0,
549 s3c24xx_serial_portname(port), ourport);
552 printk(KERN_ERR "cannot get irq %d\n", TX_IRQ(port));
556 ourport->tx_claimed = 1;
558 dbg("s3c24xx_serial_startup ok\n");
560 /* the port reset code should have done the correct
561 * register setup for the port controls */
566 s3c24xx_serial_shutdown(port);
570 /* power power management control */
572 static void s3c24xx_serial_pm(struct uart_port *port, unsigned int level,
575 struct s3c24xx_uart_port *ourport = to_ourport(port);
579 if (!IS_ERR(ourport->baudclk) && ourport->baudclk != NULL)
580 clk_disable(ourport->baudclk);
582 clk_disable(ourport->clk);
586 clk_enable(ourport->clk);
588 if (!IS_ERR(ourport->baudclk) && ourport->baudclk != NULL)
589 clk_enable(ourport->baudclk);
593 printk(KERN_ERR "s3c24xx_serial: unknown pm %d\n", level);
597 /* baud rate calculation
599 * The UARTs on the S3C2410/S3C2440 can take their clocks from a number
600 * of different sources, including the peripheral clock ("pclk") and an
601 * external clock ("uclk"). The S3C2440 also adds the core clock ("fclk")
602 * with a programmable extra divisor.
604 * The following code goes through the clock sources, and calculates the
605 * baud clocks (and the resultant actual baud rates) and then tries to
606 * pick the closest one and select that.
613 static struct s3c24xx_uart_clksrc tmp_clksrc = {
621 s3c24xx_serial_getsource(struct uart_port *port, struct s3c24xx_uart_clksrc *c)
623 struct s3c24xx_uart_info *info = s3c24xx_port_to_info(port);
625 return (info->get_clksrc)(port, c);
629 s3c24xx_serial_setsource(struct uart_port *port, struct s3c24xx_uart_clksrc *c)
631 struct s3c24xx_uart_info *info = s3c24xx_port_to_info(port);
633 return (info->set_clksrc)(port, c);
637 struct s3c24xx_uart_clksrc *clksrc;
643 static int s3c24xx_serial_calcbaud(struct baud_calc *calc,
644 struct uart_port *port,
645 struct s3c24xx_uart_clksrc *clksrc,
650 calc->src = clk_get(port->dev, clksrc->name);
651 if (calc->src == NULL || IS_ERR(calc->src))
654 rate = clk_get_rate(calc->src);
655 rate /= clksrc->divisor;
657 calc->clksrc = clksrc;
658 calc->quot = (rate + (8 * baud)) / (16 * baud);
659 calc->calc = (rate / (calc->quot * 16));
665 static unsigned int s3c24xx_serial_getclk(struct uart_port *port,
666 struct s3c24xx_uart_clksrc **clksrc,
670 struct s3c2410_uartcfg *cfg = s3c24xx_port_to_cfg(port);
671 struct s3c24xx_uart_clksrc *clkp;
672 struct baud_calc res[MAX_CLKS];
673 struct baud_calc *resptr, *best, *sptr;
679 if (cfg->clocks_size < 2) {
680 if (cfg->clocks_size == 0)
683 /* check to see if we're sourcing fclk, and if so we're
684 * going to have to update the clock source
687 if (strcmp(clkp->name, "fclk") == 0) {
688 struct s3c24xx_uart_clksrc src;
690 s3c24xx_serial_getsource(port, &src);
692 /* check that the port already using fclk, and if
693 * not, then re-select fclk
696 if (strcmp(src.name, clkp->name) == 0) {
697 s3c24xx_serial_setsource(port, clkp);
698 s3c24xx_serial_getsource(port, &src);
701 clkp->divisor = src.divisor;
704 s3c24xx_serial_calcbaud(res, port, clkp, baud);
710 for (i = 0; i < cfg->clocks_size; i++, clkp++) {
711 if (s3c24xx_serial_calcbaud(resptr, port, clkp, baud))
716 /* ok, we now need to select the best clock we found */
719 unsigned int deviation = (1<<30)|((1<<30)-1);
722 for (sptr = res; sptr < resptr; sptr++) {
724 "found clk %p (%s) quot %d, calc %d\n",
725 sptr->clksrc, sptr->clksrc->name,
726 sptr->quot, sptr->calc);
728 calc_deviation = baud - sptr->calc;
729 if (calc_deviation < 0)
730 calc_deviation = -calc_deviation;
732 if (calc_deviation < deviation) {
734 deviation = calc_deviation;
738 printk(KERN_DEBUG "best %p (deviation %d)\n", best, deviation);
741 printk(KERN_DEBUG "selected clock %p (%s) quot %d, calc %d\n",
742 best->clksrc, best->clksrc->name, best->quot, best->calc);
744 /* store results to pass back */
746 *clksrc = best->clksrc;
752 static void s3c24xx_serial_set_termios(struct uart_port *port,
753 struct termios *termios,
756 struct s3c2410_uartcfg *cfg = s3c24xx_port_to_cfg(port);
757 struct s3c24xx_uart_port *ourport = to_ourport(port);
758 struct s3c24xx_uart_clksrc *clksrc;
761 unsigned int baud, quot;
766 * We don't support modem control lines.
768 termios->c_cflag &= ~(HUPCL | CMSPAR);
769 termios->c_cflag |= CLOCAL;
772 * Ask the core to calculate the divisor for us.
775 baud = uart_get_baud_rate(port, termios, old, 0, 115200*8);
777 if (baud == 38400 && (port->flags & UPF_SPD_MASK) == UPF_SPD_CUST)
778 quot = port->custom_divisor;
780 quot = s3c24xx_serial_getclk(port, &clksrc, &clk, baud);
782 /* check to see if we need to change clock source */
784 if (ourport->clksrc != clksrc || ourport->baudclk != clk) {
785 s3c24xx_serial_setsource(port, clksrc);
787 if (ourport->baudclk != NULL && !IS_ERR(ourport->baudclk)) {
788 clk_disable(ourport->baudclk);
789 clk_unuse(ourport->baudclk);
790 ourport->baudclk = NULL;
796 ourport->clksrc = clksrc;
797 ourport->baudclk = clk;
800 switch (termios->c_cflag & CSIZE) {
802 dbg("config: 5bits/char\n");
803 ulcon = S3C2410_LCON_CS5;
806 dbg("config: 6bits/char\n");
807 ulcon = S3C2410_LCON_CS6;
810 dbg("config: 7bits/char\n");
811 ulcon = S3C2410_LCON_CS7;
815 dbg("config: 8bits/char\n");
816 ulcon = S3C2410_LCON_CS8;
820 /* preserve original lcon IR settings */
821 ulcon |= (cfg->ulcon & S3C2410_LCON_IRM);
823 if (termios->c_cflag & CSTOPB)
824 ulcon |= S3C2410_LCON_STOPB;
826 umcon = (termios->c_cflag & CRTSCTS) ? S3C2410_UMCOM_AFC : 0;
828 if (termios->c_cflag & PARENB) {
829 if (termios->c_cflag & PARODD)
830 ulcon |= S3C2410_LCON_PODD;
832 ulcon |= S3C2410_LCON_PEVEN;
834 ulcon |= S3C2410_LCON_PNONE;
837 spin_lock_irqsave(&port->lock, flags);
839 dbg("setting ulcon to %08x, brddiv to %d\n", ulcon, quot);
841 wr_regl(port, S3C2410_ULCON, ulcon);
842 wr_regl(port, S3C2410_UBRDIV, quot);
843 wr_regl(port, S3C2410_UMCON, umcon);
845 dbg("uart: ulcon = 0x%08x, ucon = 0x%08x, ufcon = 0x%08x\n",
846 rd_regl(port, S3C2410_ULCON),
847 rd_regl(port, S3C2410_UCON),
848 rd_regl(port, S3C2410_UFCON));
851 * Update the per-port timeout.
853 uart_update_timeout(port, termios->c_cflag, baud);
856 * Which character status flags are we interested in?
858 port->read_status_mask = S3C2410_UERSTAT_OVERRUN;
859 if (termios->c_iflag & INPCK)
860 port->read_status_mask |= S3C2410_UERSTAT_FRAME | S3C2410_UERSTAT_PARITY;
863 * Which character status flags should we ignore?
865 port->ignore_status_mask = 0;
866 if (termios->c_iflag & IGNPAR)
867 port->ignore_status_mask |= S3C2410_UERSTAT_OVERRUN;
868 if (termios->c_iflag & IGNBRK && termios->c_iflag & IGNPAR)
869 port->ignore_status_mask |= S3C2410_UERSTAT_FRAME;
872 * Ignore all characters if CREAD is not set.
874 if ((termios->c_cflag & CREAD) == 0)
875 port->ignore_status_mask |= RXSTAT_DUMMY_READ;
877 spin_unlock_irqrestore(&port->lock, flags);
880 static const char *s3c24xx_serial_type(struct uart_port *port)
882 switch (port->type) {
892 #define MAP_SIZE (0x100)
894 static void s3c24xx_serial_release_port(struct uart_port *port)
896 release_mem_region(port->mapbase, MAP_SIZE);
899 static int s3c24xx_serial_request_port(struct uart_port *port)
901 const char *name = s3c24xx_serial_portname(port);
902 return request_mem_region(port->mapbase, MAP_SIZE, name) ? 0 : -EBUSY;
905 static void s3c24xx_serial_config_port(struct uart_port *port, int flags)
907 struct s3c24xx_uart_info *info = s3c24xx_port_to_info(port);
909 if (flags & UART_CONFIG_TYPE &&
910 s3c24xx_serial_request_port(port) == 0)
911 port->type = info->type;
915 * verify the new serial_struct (for TIOCSSERIAL).
918 s3c24xx_serial_verify_port(struct uart_port *port, struct serial_struct *ser)
920 struct s3c24xx_uart_info *info = s3c24xx_port_to_info(port);
922 if (ser->type != PORT_UNKNOWN && ser->type != info->type)
929 #ifdef CONFIG_SERIAL_S3C2410_CONSOLE
931 static struct console s3c24xx_serial_console;
933 #define S3C24XX_SERIAL_CONSOLE &s3c24xx_serial_console
935 #define S3C24XX_SERIAL_CONSOLE NULL
938 static struct uart_ops s3c24xx_serial_ops = {
939 .pm = s3c24xx_serial_pm,
940 .tx_empty = s3c24xx_serial_tx_empty,
941 .get_mctrl = s3c24xx_serial_get_mctrl,
942 .set_mctrl = s3c24xx_serial_set_mctrl,
943 .stop_tx = s3c24xx_serial_stop_tx,
944 .start_tx = s3c24xx_serial_start_tx,
945 .stop_rx = s3c24xx_serial_stop_rx,
946 .enable_ms = s3c24xx_serial_enable_ms,
947 .break_ctl = s3c24xx_serial_break_ctl,
948 .startup = s3c24xx_serial_startup,
949 .shutdown = s3c24xx_serial_shutdown,
950 .set_termios = s3c24xx_serial_set_termios,
951 .type = s3c24xx_serial_type,
952 .release_port = s3c24xx_serial_release_port,
953 .request_port = s3c24xx_serial_request_port,
954 .config_port = s3c24xx_serial_config_port,
955 .verify_port = s3c24xx_serial_verify_port,
959 static struct uart_driver s3c24xx_uart_drv = {
960 .owner = THIS_MODULE,
961 .dev_name = "s3c2410_serial",
963 .cons = S3C24XX_SERIAL_CONSOLE,
964 .driver_name = S3C24XX_SERIAL_NAME,
965 .devfs_name = S3C24XX_SERIAL_DEVFS,
966 .major = S3C24XX_SERIAL_MAJOR,
967 .minor = S3C24XX_SERIAL_MINOR,
970 static struct s3c24xx_uart_port s3c24xx_serial_ports[NR_PORTS] = {
973 .lock = SPIN_LOCK_UNLOCKED,
975 .irq = IRQ_S3CUART_RX0,
978 .ops = &s3c24xx_serial_ops,
979 .flags = UPF_BOOT_AUTOCONF,
985 .lock = SPIN_LOCK_UNLOCKED,
987 .irq = IRQ_S3CUART_RX1,
990 .ops = &s3c24xx_serial_ops,
991 .flags = UPF_BOOT_AUTOCONF,
999 .lock = SPIN_LOCK_UNLOCKED,
1001 .irq = IRQ_S3CUART_RX2,
1004 .ops = &s3c24xx_serial_ops,
1005 .flags = UPF_BOOT_AUTOCONF,
1012 /* s3c24xx_serial_resetport
1014 * wrapper to call the specific reset for this port (reset the fifos
1018 static inline int s3c24xx_serial_resetport(struct uart_port * port,
1019 struct s3c2410_uartcfg *cfg)
1021 struct s3c24xx_uart_info *info = s3c24xx_port_to_info(port);
1023 return (info->reset_port)(port, cfg);
1026 /* s3c24xx_serial_init_port
1028 * initialise a single serial port from the platform device given
1031 static int s3c24xx_serial_init_port(struct s3c24xx_uart_port *ourport,
1032 struct s3c24xx_uart_info *info,
1033 struct platform_device *platdev)
1035 struct uart_port *port = &ourport->port;
1036 struct s3c2410_uartcfg *cfg;
1037 struct resource *res;
1039 dbg("s3c24xx_serial_init_port: port=%p, platdev=%p\n", port, platdev);
1041 if (platdev == NULL)
1044 cfg = s3c24xx_dev_to_cfg(&platdev->dev);
1046 if (port->mapbase != 0)
1049 if (cfg->hwport > 3)
1052 /* setup info for port */
1053 port->dev = &platdev->dev;
1054 ourport->info = info;
1056 /* copy the info in from provided structure */
1057 ourport->port.fifosize = info->fifosize;
1059 dbg("s3c24xx_serial_init_port: %p (hw %d)...\n", port, cfg->hwport);
1063 if (cfg->uart_flags & UPF_CONS_FLOW) {
1064 dbg("s3c24xx_serial_init_port: enabling flow control\n");
1065 port->flags |= UPF_CONS_FLOW;
1068 /* sort our the physical and virtual addresses for each UART */
1070 res = platform_get_resource(platdev, IORESOURCE_MEM, 0);
1072 printk(KERN_ERR "failed to find memory resource for uart\n");
1076 dbg("resource %p (%lx..%lx)\n", res, res->start, res->end);
1078 port->mapbase = res->start;
1079 port->membase = S3C24XX_VA_UART + (res->start - S3C2410_PA_UART);
1080 port->irq = platform_get_irq(platdev, 0);
1082 ourport->clk = clk_get(&platdev->dev, "uart");
1084 if (ourport->clk != NULL && !IS_ERR(ourport->clk))
1085 clk_use(ourport->clk);
1087 dbg("port: map=%08x, mem=%08x, irq=%d, clock=%ld\n",
1088 port->mapbase, port->membase, port->irq, port->uartclk);
1090 /* reset the fifos (and setup the uart) */
1091 s3c24xx_serial_resetport(port, cfg);
1095 /* Device driver serial port probe */
1097 static int probe_index = 0;
1099 int s3c24xx_serial_probe(struct device *_dev,
1100 struct s3c24xx_uart_info *info)
1102 struct s3c24xx_uart_port *ourport;
1103 struct platform_device *dev = to_platform_device(_dev);
1106 dbg("s3c24xx_serial_probe(%p, %p) %d\n", _dev, info, probe_index);
1108 ourport = &s3c24xx_serial_ports[probe_index];
1111 dbg("%s: initialising port %p...\n", __FUNCTION__, ourport);
1113 ret = s3c24xx_serial_init_port(ourport, info, dev);
1117 dbg("%s: adding port\n", __FUNCTION__);
1118 uart_add_one_port(&s3c24xx_uart_drv, &ourport->port);
1119 dev_set_drvdata(_dev, &ourport->port);
1127 int s3c24xx_serial_remove(struct device *_dev)
1129 struct uart_port *port = s3c24xx_dev_to_port(_dev);
1132 uart_remove_one_port(&s3c24xx_uart_drv, port);
1137 /* UART power management code */
1141 int s3c24xx_serial_suspend(struct device *dev, pm_message_t state, u32 level)
1143 struct uart_port *port = s3c24xx_dev_to_port(dev);
1145 if (port && level == SUSPEND_DISABLE)
1146 uart_suspend_port(&s3c24xx_uart_drv, port);
1151 int s3c24xx_serial_resume(struct device *dev, u32 level)
1153 struct uart_port *port = s3c24xx_dev_to_port(dev);
1154 struct s3c24xx_uart_port *ourport = to_ourport(port);
1156 if (port && level == RESUME_ENABLE) {
1157 clk_enable(ourport->clk);
1158 s3c24xx_serial_resetport(port, s3c24xx_port_to_cfg(port));
1159 clk_disable(ourport->clk);
1161 uart_resume_port(&s3c24xx_uart_drv, port);
1168 #define s3c24xx_serial_suspend NULL
1169 #define s3c24xx_serial_resume NULL
1172 int s3c24xx_serial_init(struct device_driver *drv,
1173 struct s3c24xx_uart_info *info)
1175 dbg("s3c24xx_serial_init(%p,%p)\n", drv, info);
1176 return driver_register(drv);
1180 /* now comes the code to initialise either the s3c2410 or s3c2440 serial
1184 /* cpu specific variations on the serial port support */
1186 #ifdef CONFIG_CPU_S3C2400
1188 static int s3c2400_serial_getsource(struct uart_port *port,
1189 struct s3c24xx_uart_clksrc *clk)
1197 static int s3c2400_serial_setsource(struct uart_port *port,
1198 struct s3c24xx_uart_clksrc *clk)
1203 static int s3c2400_serial_resetport(struct uart_port *port,
1204 struct s3c2410_uartcfg *cfg)
1206 dbg("s3c2400_serial_resetport: port=%p (%08lx), cfg=%p\n",
1207 port, port->mapbase, cfg);
1209 wr_regl(port, S3C2410_UCON, cfg->ucon);
1210 wr_regl(port, S3C2410_ULCON, cfg->ulcon);
1212 /* reset both fifos */
1214 wr_regl(port, S3C2410_UFCON, cfg->ufcon | S3C2410_UFCON_RESETBOTH);
1215 wr_regl(port, S3C2410_UFCON, cfg->ufcon);
1220 static struct s3c24xx_uart_info s3c2400_uart_inf = {
1221 .name = "Samsung S3C2400 UART",
1222 .type = PORT_S3C2400,
1224 .rx_fifomask = S3C2410_UFSTAT_RXMASK,
1225 .rx_fifoshift = S3C2410_UFSTAT_RXSHIFT,
1226 .rx_fifofull = S3C2410_UFSTAT_RXFULL,
1227 .tx_fifofull = S3C2410_UFSTAT_TXFULL,
1228 .tx_fifomask = S3C2410_UFSTAT_TXMASK,
1229 .tx_fifoshift = S3C2410_UFSTAT_TXSHIFT,
1230 .get_clksrc = s3c2400_serial_getsource,
1231 .set_clksrc = s3c2400_serial_setsource,
1232 .reset_port = s3c2400_serial_resetport,
1235 static int s3c2400_serial_probe(struct device *dev)
1237 return s3c24xx_serial_probe(dev, &s3c2400_uart_inf);
1240 static struct device_driver s3c2400_serial_drv = {
1241 .name = "s3c2400-uart",
1242 .bus = &platform_bus_type,
1243 .probe = s3c2400_serial_probe,
1244 .remove = s3c24xx_serial_remove,
1245 .suspend = s3c24xx_serial_suspend,
1246 .resume = s3c24xx_serial_resume,
1249 static inline int s3c2400_serial_init(void)
1251 return s3c24xx_serial_init(&s3c2400_serial_drv, &s3c2400_uart_inf);
1254 static inline void s3c2400_serial_exit(void)
1256 driver_unregister(&s3c2400_serial_drv);
1259 #define s3c2400_uart_inf_at &s3c2400_uart_inf
1262 static inline int s3c2400_serial_init(void)
1267 static inline void s3c2400_serial_exit(void)
1271 #define s3c2400_uart_inf_at NULL
1273 #endif /* CONFIG_CPU_S3C2400 */
1275 /* S3C2410 support */
1277 #ifdef CONFIG_CPU_S3C2410
1279 static int s3c2410_serial_setsource(struct uart_port *port,
1280 struct s3c24xx_uart_clksrc *clk)
1282 unsigned long ucon = rd_regl(port, S3C2410_UCON);
1284 if (strcmp(clk->name, "uclk") == 0)
1285 ucon |= S3C2410_UCON_UCLK;
1287 ucon &= ~S3C2410_UCON_UCLK;
1289 wr_regl(port, S3C2410_UCON, ucon);
1293 static int s3c2410_serial_getsource(struct uart_port *port,
1294 struct s3c24xx_uart_clksrc *clk)
1296 unsigned long ucon = rd_regl(port, S3C2410_UCON);
1299 clk->name = (ucon & S3C2410_UCON_UCLK) ? "uclk" : "pclk";
1304 static int s3c2410_serial_resetport(struct uart_port *port,
1305 struct s3c2410_uartcfg *cfg)
1307 dbg("s3c2410_serial_resetport: port=%p (%08lx), cfg=%p\n",
1308 port, port->mapbase, cfg);
1310 wr_regl(port, S3C2410_UCON, cfg->ucon);
1311 wr_regl(port, S3C2410_ULCON, cfg->ulcon);
1313 /* reset both fifos */
1315 wr_regl(port, S3C2410_UFCON, cfg->ufcon | S3C2410_UFCON_RESETBOTH);
1316 wr_regl(port, S3C2410_UFCON, cfg->ufcon);
1321 static struct s3c24xx_uart_info s3c2410_uart_inf = {
1322 .name = "Samsung S3C2410 UART",
1323 .type = PORT_S3C2410,
1325 .rx_fifomask = S3C2410_UFSTAT_RXMASK,
1326 .rx_fifoshift = S3C2410_UFSTAT_RXSHIFT,
1327 .rx_fifofull = S3C2410_UFSTAT_RXFULL,
1328 .tx_fifofull = S3C2410_UFSTAT_TXFULL,
1329 .tx_fifomask = S3C2410_UFSTAT_TXMASK,
1330 .tx_fifoshift = S3C2410_UFSTAT_TXSHIFT,
1331 .get_clksrc = s3c2410_serial_getsource,
1332 .set_clksrc = s3c2410_serial_setsource,
1333 .reset_port = s3c2410_serial_resetport,
1336 /* device management */
1338 static int s3c2410_serial_probe(struct device *dev)
1340 return s3c24xx_serial_probe(dev, &s3c2410_uart_inf);
1343 static struct device_driver s3c2410_serial_drv = {
1344 .name = "s3c2410-uart",
1345 .bus = &platform_bus_type,
1346 .probe = s3c2410_serial_probe,
1347 .remove = s3c24xx_serial_remove,
1348 .suspend = s3c24xx_serial_suspend,
1349 .resume = s3c24xx_serial_resume,
1352 static inline int s3c2410_serial_init(void)
1354 return s3c24xx_serial_init(&s3c2410_serial_drv, &s3c2410_uart_inf);
1357 static inline void s3c2410_serial_exit(void)
1359 driver_unregister(&s3c2410_serial_drv);
1362 #define s3c2410_uart_inf_at &s3c2410_uart_inf
1365 static inline int s3c2410_serial_init(void)
1370 static inline void s3c2410_serial_exit(void)
1374 #define s3c2410_uart_inf_at NULL
1376 #endif /* CONFIG_CPU_S3C2410 */
1378 #ifdef CONFIG_CPU_S3C2440
1380 static int s3c2440_serial_setsource(struct uart_port *port,
1381 struct s3c24xx_uart_clksrc *clk)
1383 unsigned long ucon = rd_regl(port, S3C2410_UCON);
1385 // todo - proper fclk<>nonfclk switch //
1387 ucon &= ~S3C2440_UCON_CLKMASK;
1389 if (strcmp(clk->name, "uclk") == 0)
1390 ucon |= S3C2440_UCON_UCLK;
1391 else if (strcmp(clk->name, "pclk") == 0)
1392 ucon |= S3C2440_UCON_PCLK;
1393 else if (strcmp(clk->name, "fclk") == 0)
1394 ucon |= S3C2440_UCON_FCLK;
1396 printk(KERN_ERR "unknown clock source %s\n", clk->name);
1400 wr_regl(port, S3C2410_UCON, ucon);
1405 static int s3c2440_serial_getsource(struct uart_port *port,
1406 struct s3c24xx_uart_clksrc *clk)
1408 unsigned long ucon = rd_regl(port, S3C2410_UCON);
1409 unsigned long ucon0, ucon1, ucon2;
1411 switch (ucon & S3C2440_UCON_CLKMASK) {
1412 case S3C2440_UCON_UCLK:
1417 case S3C2440_UCON_PCLK:
1418 case S3C2440_UCON_PCLK2:
1423 case S3C2440_UCON_FCLK:
1424 /* the fun of calculating the uart divisors on
1427 ucon0 = __raw_readl(S3C24XX_VA_UART0 + S3C2410_UCON);
1428 ucon1 = __raw_readl(S3C24XX_VA_UART1 + S3C2410_UCON);
1429 ucon2 = __raw_readl(S3C24XX_VA_UART2 + S3C2410_UCON);
1431 printk("ucons: %08lx, %08lx, %08lx\n", ucon0, ucon1, ucon2);
1433 ucon0 &= S3C2440_UCON0_DIVMASK;
1434 ucon1 &= S3C2440_UCON1_DIVMASK;
1435 ucon2 &= S3C2440_UCON2_DIVMASK;
1438 clk->divisor = ucon0 >> S3C2440_UCON_DIVSHIFT;
1440 } else if (ucon1 != 0) {
1441 clk->divisor = ucon1 >> S3C2440_UCON_DIVSHIFT;
1443 } else if (ucon2 != 0) {
1444 clk->divisor = ucon2 >> S3C2440_UCON_DIVSHIFT;
1447 /* manual calims 44, seems to be 9 */
1458 static int s3c2440_serial_resetport(struct uart_port *port,
1459 struct s3c2410_uartcfg *cfg)
1461 unsigned long ucon = rd_regl(port, S3C2410_UCON);
1463 dbg("s3c2440_serial_resetport: port=%p (%08lx), cfg=%p\n",
1464 port, port->mapbase, cfg);
1466 /* ensure we don't change the clock settings... */
1468 ucon &= (S3C2440_UCON0_DIVMASK | (3<<10));
1470 wr_regl(port, S3C2410_UCON, ucon | cfg->ucon);
1471 wr_regl(port, S3C2410_ULCON, cfg->ulcon);
1473 /* reset both fifos */
1475 wr_regl(port, S3C2410_UFCON, cfg->ufcon | S3C2410_UFCON_RESETBOTH);
1476 wr_regl(port, S3C2410_UFCON, cfg->ufcon);
1481 static struct s3c24xx_uart_info s3c2440_uart_inf = {
1482 .name = "Samsung S3C2440 UART",
1483 .type = PORT_S3C2440,
1485 .rx_fifomask = S3C2440_UFSTAT_RXMASK,
1486 .rx_fifoshift = S3C2440_UFSTAT_RXSHIFT,
1487 .rx_fifofull = S3C2440_UFSTAT_RXFULL,
1488 .tx_fifofull = S3C2440_UFSTAT_TXFULL,
1489 .tx_fifomask = S3C2440_UFSTAT_TXMASK,
1490 .tx_fifoshift = S3C2440_UFSTAT_TXSHIFT,
1491 .get_clksrc = s3c2440_serial_getsource,
1492 .set_clksrc = s3c2440_serial_setsource,
1493 .reset_port = s3c2440_serial_resetport,
1496 /* device management */
1498 static int s3c2440_serial_probe(struct device *dev)
1500 dbg("s3c2440_serial_probe: dev=%p\n", dev);
1501 return s3c24xx_serial_probe(dev, &s3c2440_uart_inf);
1504 static struct device_driver s3c2440_serial_drv = {
1505 .name = "s3c2440-uart",
1506 .bus = &platform_bus_type,
1507 .probe = s3c2440_serial_probe,
1508 .remove = s3c24xx_serial_remove,
1509 .suspend = s3c24xx_serial_suspend,
1510 .resume = s3c24xx_serial_resume,
1514 static inline int s3c2440_serial_init(void)
1516 return s3c24xx_serial_init(&s3c2440_serial_drv, &s3c2440_uart_inf);
1519 static inline void s3c2440_serial_exit(void)
1521 driver_unregister(&s3c2440_serial_drv);
1524 #define s3c2440_uart_inf_at &s3c2440_uart_inf
1527 static inline int s3c2440_serial_init(void)
1532 static inline void s3c2440_serial_exit(void)
1536 #define s3c2440_uart_inf_at NULL
1537 #endif /* CONFIG_CPU_S3C2440 */
1539 /* module initialisation code */
1541 static int __init s3c24xx_serial_modinit(void)
1545 ret = uart_register_driver(&s3c24xx_uart_drv);
1547 printk(KERN_ERR "failed to register UART driver\n");
1551 s3c2400_serial_init();
1552 s3c2410_serial_init();
1553 s3c2440_serial_init();
1558 static void __exit s3c24xx_serial_modexit(void)
1560 s3c2400_serial_exit();
1561 s3c2410_serial_exit();
1562 s3c2440_serial_exit();
1564 uart_unregister_driver(&s3c24xx_uart_drv);
1568 module_init(s3c24xx_serial_modinit);
1569 module_exit(s3c24xx_serial_modexit);
1573 #ifdef CONFIG_SERIAL_S3C2410_CONSOLE
1575 static struct uart_port *cons_uart;
1578 s3c24xx_serial_console_txrdy(struct uart_port *port, unsigned int ufcon)
1580 struct s3c24xx_uart_info *info = s3c24xx_port_to_info(port);
1581 unsigned long ufstat, utrstat;
1583 if (ufcon & S3C2410_UFCON_FIFOMODE) {
1584 /* fifo mode - check ammount of data in fifo registers... */
1586 ufstat = rd_regl(port, S3C2410_UFSTAT);
1587 return (ufstat & info->tx_fifofull) ? 0 : 1;
1590 /* in non-fifo mode, we go and use the tx buffer empty */
1592 utrstat = rd_regl(port, S3C2410_UTRSTAT);
1593 return (utrstat & S3C2410_UTRSTAT_TXE) ? 1 : 0;
1597 s3c24xx_serial_console_write(struct console *co, const char *s,
1601 unsigned int ufcon = rd_regl(cons_uart, S3C2410_UFCON);
1603 for (i = 0; i < count; i++) {
1604 while (!s3c24xx_serial_console_txrdy(cons_uart, ufcon))
1607 wr_regb(cons_uart, S3C2410_UTXH, s[i]);
1610 while (!s3c24xx_serial_console_txrdy(cons_uart, ufcon))
1613 wr_regb(cons_uart, S3C2410_UTXH, '\r');
1619 s3c24xx_serial_get_options(struct uart_port *port, int *baud,
1620 int *parity, int *bits)
1622 struct s3c24xx_uart_clksrc clksrc;
1626 unsigned int ubrdiv;
1629 ulcon = rd_regl(port, S3C2410_ULCON);
1630 ucon = rd_regl(port, S3C2410_UCON);
1631 ubrdiv = rd_regl(port, S3C2410_UBRDIV);
1633 dbg("s3c24xx_serial_get_options: port=%p\n"
1634 "registers: ulcon=%08x, ucon=%08x, ubdriv=%08x\n",
1635 port, ulcon, ucon, ubrdiv);
1637 if ((ucon & 0xf) != 0) {
1638 /* consider the serial port configured if the tx/rx mode set */
1640 switch (ulcon & S3C2410_LCON_CSMASK) {
1641 case S3C2410_LCON_CS5:
1644 case S3C2410_LCON_CS6:
1647 case S3C2410_LCON_CS7:
1651 case S3C2410_LCON_CS8:
1656 switch (ulcon & S3C2410_LCON_PMASK) {
1657 case S3C2410_LCON_PEVEN:
1661 case S3C2410_LCON_PODD:
1665 case S3C2410_LCON_PNONE:
1670 /* now calculate the baud rate */
1672 s3c24xx_serial_getsource(port, &clksrc);
1674 clk = clk_get(port->dev, clksrc.name);
1675 if (!IS_ERR(clk) && clk != NULL)
1676 rate = clk_get_rate(clk) / clksrc.divisor;
1681 *baud = rate / ( 16 * (ubrdiv + 1));
1682 dbg("calculated baud %d\n", *baud);
1687 /* s3c24xx_serial_init_ports
1689 * initialise the serial ports from the machine provided initialisation
1693 static int s3c24xx_serial_init_ports(struct s3c24xx_uart_info *info)
1695 struct s3c24xx_uart_port *ptr = s3c24xx_serial_ports;
1696 struct platform_device **platdev_ptr;
1699 dbg("s3c24xx_serial_init_ports: initialising ports...\n");
1701 platdev_ptr = s3c24xx_uart_devs;
1703 for (i = 0; i < NR_PORTS; i++, ptr++, platdev_ptr++) {
1704 s3c24xx_serial_init_port(ptr, info, *platdev_ptr);
1711 s3c24xx_serial_console_setup(struct console *co, char *options)
1713 struct uart_port *port;
1719 dbg("s3c24xx_serial_console_setup: co=%p (%d), %s\n",
1720 co, co->index, options);
1722 /* is this a valid port */
1724 if (co->index == -1 || co->index >= NR_PORTS)
1727 port = &s3c24xx_serial_ports[co->index].port;
1729 /* is the port configured? */
1731 if (port->mapbase == 0x0) {
1733 port = &s3c24xx_serial_ports[co->index].port;
1738 dbg("s3c24xx_serial_console_setup: port=%p (%d)\n", port, co->index);
1741 * Check whether an invalid uart number has been specified, and
1742 * if so, search for the first available port that does have
1746 uart_parse_options(options, &baud, &parity, &bits, &flow);
1748 s3c24xx_serial_get_options(port, &baud, &parity, &bits);
1750 dbg("s3c24xx_serial_console_setup: baud %d\n", baud);
1752 return uart_set_options(port, co, baud, parity, bits, flow);
1755 /* s3c24xx_serial_initconsole
1757 * initialise the console from one of the uart drivers
1760 static struct console s3c24xx_serial_console =
1762 .name = S3C24XX_SERIAL_NAME,
1763 .device = uart_console_device,
1764 .flags = CON_PRINTBUFFER,
1766 .write = s3c24xx_serial_console_write,
1767 .setup = s3c24xx_serial_console_setup
1770 static int s3c24xx_serial_initconsole(void)
1772 struct s3c24xx_uart_info *info;
1773 struct platform_device *dev = s3c24xx_uart_devs[0];
1775 dbg("s3c24xx_serial_initconsole\n");
1777 /* select driver based on the cpu */
1780 printk(KERN_ERR "s3c24xx: no devices for console init\n");
1784 if (strcmp(dev->name, "s3c2400-uart") == 0) {
1785 info = s3c2400_uart_inf_at;
1786 } else if (strcmp(dev->name, "s3c2410-uart") == 0) {
1787 info = s3c2410_uart_inf_at;
1788 } else if (strcmp(dev->name, "s3c2440-uart") == 0) {
1789 info = s3c2440_uart_inf_at;
1791 printk(KERN_ERR "s3c24xx: no driver for %s\n", dev->name);
1796 printk(KERN_ERR "s3c24xx: no driver for console\n");
1800 s3c24xx_serial_console.data = &s3c24xx_uart_drv;
1801 s3c24xx_serial_init_ports(info);
1803 register_console(&s3c24xx_serial_console);
1807 console_initcall(s3c24xx_serial_initconsole);
1809 #endif /* CONFIG_SERIAL_S3C2410_CONSOLE */
1811 MODULE_LICENSE("GPL");
1812 MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>");
1813 MODULE_DESCRIPTION("Samsung S3C2410/S3C2440 Serial port driver");