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 for Samsung S3C2410 SoC onboard UARTs. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * |
Ben Dooks | ccae941 | 2009-11-13 22:54:14 +0000 | [diff] [blame] | 4 | * Ben Dooks, Copyright (c) 2003-2008 Simtec Electronics |
Ben Dooks | 05a7896 | 2008-05-22 16:36:45 +0100 | [diff] [blame] | 5 | * http://armlinux.simtec.co.uk/ |
Ben Dooks | 8fe059d | 2008-05-23 11:48:00 +0100 | [diff] [blame] | 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. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 10 | */ |
| 11 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 12 | #include <linux/module.h> |
| 13 | #include <linux/ioport.h> |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 14 | #include <linux/io.h> |
Russell King | d052d1b | 2005-10-29 19:07:23 +0100 | [diff] [blame] | 15 | #include <linux/platform_device.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 16 | #include <linux/init.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | #include <linux/serial_core.h> |
| 18 | #include <linux/serial.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | #include <asm/irq.h> |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 21 | #include <mach/hardware.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | |
Ben Dooks | a2b7ba9 | 2008-10-07 22:26:09 +0100 | [diff] [blame] | 23 | #include <plat/regs-serial.h> |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 24 | #include <mach/regs-gpio.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 26 | #include "samsung.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | |
| 28 | static int s3c2410_serial_setsource(struct uart_port *port, |
| 29 | struct s3c24xx_uart_clksrc *clk) |
| 30 | { |
| 31 | unsigned long ucon = rd_regl(port, S3C2410_UCON); |
| 32 | |
| 33 | if (strcmp(clk->name, "uclk") == 0) |
| 34 | ucon |= S3C2410_UCON_UCLK; |
| 35 | else |
| 36 | ucon &= ~S3C2410_UCON_UCLK; |
| 37 | |
| 38 | wr_regl(port, S3C2410_UCON, ucon); |
| 39 | return 0; |
| 40 | } |
| 41 | |
| 42 | static int s3c2410_serial_getsource(struct uart_port *port, |
| 43 | struct s3c24xx_uart_clksrc *clk) |
| 44 | { |
| 45 | unsigned long ucon = rd_regl(port, S3C2410_UCON); |
| 46 | |
| 47 | clk->divisor = 1; |
| 48 | clk->name = (ucon & S3C2410_UCON_UCLK) ? "uclk" : "pclk"; |
| 49 | |
| 50 | return 0; |
| 51 | } |
| 52 | |
| 53 | static int s3c2410_serial_resetport(struct uart_port *port, |
| 54 | struct s3c2410_uartcfg *cfg) |
| 55 | { |
| 56 | dbg("s3c2410_serial_resetport: port=%p (%08lx), cfg=%p\n", |
| 57 | port, port->mapbase, cfg); |
| 58 | |
| 59 | wr_regl(port, S3C2410_UCON, cfg->ucon); |
| 60 | wr_regl(port, S3C2410_ULCON, cfg->ulcon); |
| 61 | |
| 62 | /* reset both fifos */ |
| 63 | |
| 64 | wr_regl(port, S3C2410_UFCON, cfg->ufcon | S3C2410_UFCON_RESETBOTH); |
| 65 | wr_regl(port, S3C2410_UFCON, cfg->ufcon); |
| 66 | |
| 67 | return 0; |
| 68 | } |
| 69 | |
| 70 | static struct s3c24xx_uart_info s3c2410_uart_inf = { |
| 71 | .name = "Samsung S3C2410 UART", |
| 72 | .type = PORT_S3C2410, |
| 73 | .fifosize = 16, |
| 74 | .rx_fifomask = S3C2410_UFSTAT_RXMASK, |
| 75 | .rx_fifoshift = S3C2410_UFSTAT_RXSHIFT, |
| 76 | .rx_fifofull = S3C2410_UFSTAT_RXFULL, |
| 77 | .tx_fifofull = S3C2410_UFSTAT_TXFULL, |
| 78 | .tx_fifomask = S3C2410_UFSTAT_TXMASK, |
| 79 | .tx_fifoshift = S3C2410_UFSTAT_TXSHIFT, |
| 80 | .get_clksrc = s3c2410_serial_getsource, |
| 81 | .set_clksrc = s3c2410_serial_setsource, |
| 82 | .reset_port = s3c2410_serial_resetport, |
| 83 | }; |
| 84 | |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 85 | static int s3c2410_serial_probe(struct platform_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | { |
| 87 | return s3c24xx_serial_probe(dev, &s3c2410_uart_inf); |
| 88 | } |
| 89 | |
Ramax Lo | 8fe70a5 | 2009-07-09 16:28:33 +0800 | [diff] [blame] | 90 | static struct platform_driver s3c2410_serial_driver = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | .probe = s3c2410_serial_probe, |
Peter Korsgaard | 90ceb964 | 2009-06-22 18:42:49 +0100 | [diff] [blame] | 92 | .remove = __devexit_p(s3c24xx_serial_remove), |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 93 | .driver = { |
| 94 | .name = "s3c2410-uart", |
| 95 | .owner = THIS_MODULE, |
| 96 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | }; |
| 98 | |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 99 | static int __init s3c2410_serial_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | { |
Ramax Lo | 8fe70a5 | 2009-07-09 16:28:33 +0800 | [diff] [blame] | 101 | return s3c24xx_serial_init(&s3c2410_serial_driver, &s3c2410_uart_inf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | } |
| 103 | |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 104 | static void __exit s3c2410_serial_exit(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | { |
Ramax Lo | 8fe70a5 | 2009-07-09 16:28:33 +0800 | [diff] [blame] | 106 | platform_driver_unregister(&s3c2410_serial_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 107 | } |
| 108 | |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 109 | module_init(s3c2410_serial_init); |
| 110 | module_exit(s3c2410_serial_exit); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | |
Ben Dooks | 8fe059d | 2008-05-23 11:48:00 +0100 | [diff] [blame] | 112 | MODULE_LICENSE("GPL v2"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>"); |
Ben Dooks | b497549 | 2008-07-03 12:32:51 +0100 | [diff] [blame] | 114 | MODULE_DESCRIPTION("Samsung S3C2410 SoC Serial port driver"); |
Kay Sievers | e169c13 | 2008-04-15 14:34:35 -0700 | [diff] [blame] | 115 | MODULE_ALIAS("platform:s3c2410-uart"); |