projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1d4bab08 SP |
1 | /* linux/drivers/serial/s3c24a0.c |
| 2 | * | |
| 3 | * Driver for Samsung S3C24A0 SoC onboard UARTs. | |
| 4 | * | |
| 5 | * Based on drivers/serial/s3c2410.c | |
| 6 | * | |
| 7 | * Author: Sandeep Patil <[email protected]> | |
| 8 | * | |
| 9 | * Ben Dooks, Copyright (c) 2003-2005,2008 Simtec Electronics | |
| 10 | * http://armlinux.simtec.co.uk/ | |
| 11 | * | |
| 12 | * This program is free software; you can redistribute it and/or modify | |
| 13 | * it under the terms of the GNU General Public License version 2 as | |
| 14 | * published by the Free Software Foundation. | |
| 15 | */ | |
| 16 | ||
| 17 | #include <linux/module.h> | |
| 18 | #include <linux/ioport.h> | |
| 19 | #include <linux/platform_device.h> | |
| 20 | #include <linux/init.h> | |
| 21 | #include <linux/serial_core.h> | |
| 22 | #include <linux/serial.h> | |
| 23 | #include <linux/io.h> | |
| 24 | #include <linux/irq.h> | |
| 25 | ||
| 26 | #include <mach/hardware.h> | |
| 27 | ||
| 28 | #include <plat/regs-serial.h> | |
| 29 | #include <mach/regs-gpio.h> | |
| 30 | ||
| 31 | #include "samsung.h" | |
| 32 | ||
| 33 | static int s3c24a0_serial_setsource(struct uart_port *port, | |
| 34 | struct s3c24xx_uart_clksrc *clk) | |
| 35 | { | |
| 36 | unsigned long ucon = rd_regl(port, S3C2410_UCON); | |
| 37 | ||
| 38 | if (strcmp(clk->name, "uclk") == 0) | |
| 39 | ucon |= S3C2410_UCON_UCLK; | |
| 40 | else | |
| 41 | ucon &= ~S3C2410_UCON_UCLK; | |
| 42 | ||
| 43 | wr_regl(port, S3C2410_UCON, ucon); | |
| 44 | return 0; | |
| 45 | } | |
| 46 | ||
| 47 | static int s3c24a0_serial_getsource(struct uart_port *port, | |
| 48 | struct s3c24xx_uart_clksrc *clk) | |
| 49 | { | |
| 50 | unsigned long ucon = rd_regl(port, S3C2410_UCON); | |
| 51 | ||
| 52 | clk->divisor = 1; | |
| 53 | clk->name = (ucon & S3C2410_UCON_UCLK) ? "uclk" : "pclk"; | |
| 54 | ||
| 55 | return 0; | |
| 56 | } | |
| 57 | ||
| 58 | static int s3c24a0_serial_resetport(struct uart_port *port, | |
| 59 | struct s3c2410_uartcfg *cfg) | |
| 60 | { | |
| 61 | dbg("s3c24a0_serial_resetport: port=%p (%08lx), cfg=%p\n", | |
| 62 | port, port->mapbase, cfg); | |
| 63 | ||
| 64 | wr_regl(port, S3C2410_UCON, cfg->ucon); | |
| 65 | wr_regl(port, S3C2410_ULCON, cfg->ulcon); | |
| 66 | ||
| 67 | /* reset both fifos */ | |
| 68 | ||
| 69 | wr_regl(port, S3C2410_UFCON, cfg->ufcon | S3C2410_UFCON_RESETBOTH); | |
| 70 | wr_regl(port, S3C2410_UFCON, cfg->ufcon); | |
| 71 | ||
| 72 | return 0; | |
| 73 | } | |
| 74 | ||
| 75 | static struct s3c24xx_uart_info s3c24a0_uart_inf = { | |
| 76 | .name = "Samsung S3C24A0 UART", | |
| 77 | .type = PORT_S3C2410, | |
| 78 | .fifosize = 16, | |
| 79 | .rx_fifomask = S3C24A0_UFSTAT_RXMASK, | |
| 80 | .rx_fifoshift = S3C24A0_UFSTAT_RXSHIFT, | |
| 81 | .rx_fifofull = S3C24A0_UFSTAT_RXFULL, | |
| 82 | .tx_fifofull = S3C24A0_UFSTAT_TXFULL, | |
| 83 | .tx_fifomask = S3C24A0_UFSTAT_TXMASK, | |
| 84 | .tx_fifoshift = S3C24A0_UFSTAT_TXSHIFT, | |
| 85 | .get_clksrc = s3c24a0_serial_getsource, | |
| 86 | .set_clksrc = s3c24a0_serial_setsource, | |
| 87 | .reset_port = s3c24a0_serial_resetport, | |
| 88 | }; | |
| 89 | ||
| 90 | static int s3c24a0_serial_probe(struct platform_device *dev) | |
| 91 | { | |
| 92 | return s3c24xx_serial_probe(dev, &s3c24a0_uart_inf); | |
| 93 | } | |
| 94 | ||
| 95 | static struct platform_driver s3c24a0_serial_drv = { | |
| 96 | .probe = s3c24a0_serial_probe, | |
| 90ceb964 | 97 | .remove = __devexit_p(s3c24xx_serial_remove), |
| 1d4bab08 SP |
98 | .driver = { |
| 99 | .name = "s3c24a0-uart", | |
| 100 | .owner = THIS_MODULE, | |
| 101 | }, | |
| 102 | }; | |
| 103 | ||
| 104 | s3c24xx_console_init(&s3c24a0_serial_drv, &s3c24a0_uart_inf); | |
| 105 | ||
| 106 | static int __init s3c24a0_serial_init(void) | |
| 107 | { | |
| 108 | return s3c24xx_serial_init(&s3c24a0_serial_drv, &s3c24a0_uart_inf); | |
| 109 | } | |
| 110 | ||
| 111 | static void __exit s3c24a0_serial_exit(void) | |
| 112 | { | |
| 113 | platform_driver_unregister(&s3c24a0_serial_drv); | |
| 114 | } | |
| 115 | ||
| 116 | module_init(s3c24a0_serial_init); | |
| 117 | module_exit(s3c24a0_serial_exit); | |
| 118 |