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Merge branch 'omap-clock-fixes' of git://git.pwsan.com/linux-2.6
[linux-2.6-omap-h63xx.git] / drivers / serial / s3c2400.c
1 /* linux/drivers/serial/s3c240.c
2  *
3  * Driver for Samsung SoC onboard UARTs.
4  *
5  * Ben Dooks, Copyright (c) 2003-2005 Simtec Electronics
6  *      http://armlinux.simtec.co.uk/
7  *
8  * This program is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License version 2 as
10  * published by the Free Software Foundation.
11 */
12
13 #include <linux/module.h>
14 #include <linux/ioport.h>
15 #include <linux/io.h>
16 #include <linux/platform_device.h>
17
18 #include <asm/irq.h>
19
20 #include <mach/hardware.h>
21
22 #include <plat/regs-serial.h>
23 #include <mach/regs-gpio.h>
24
25 #include "samsung.h"
26
27 static int s3c2400_serial_getsource(struct uart_port *port,
28                                     struct s3c24xx_uart_clksrc *clk)
29 {
30         clk->divisor = 1;
31         clk->name = "pclk";
32
33         return 0;
34 }
35
36 static int s3c2400_serial_setsource(struct uart_port *port,
37                                     struct s3c24xx_uart_clksrc *clk)
38 {
39         return 0;
40 }
41
42 static int s3c2400_serial_resetport(struct uart_port *port,
43                                     struct s3c2410_uartcfg *cfg)
44 {
45         dbg("s3c2400_serial_resetport: port=%p (%08lx), cfg=%p\n",
46             port, port->mapbase, cfg);
47
48         wr_regl(port, S3C2410_UCON,  cfg->ucon);
49         wr_regl(port, S3C2410_ULCON, cfg->ulcon);
50
51         /* reset both fifos */
52
53         wr_regl(port, S3C2410_UFCON, cfg->ufcon | S3C2410_UFCON_RESETBOTH);
54         wr_regl(port, S3C2410_UFCON, cfg->ufcon);
55
56         return 0;
57 }
58
59 static struct s3c24xx_uart_info s3c2400_uart_inf = {
60         .name           = "Samsung S3C2400 UART",
61         .type           = PORT_S3C2400,
62         .fifosize       = 16,
63         .rx_fifomask    = S3C2410_UFSTAT_RXMASK,
64         .rx_fifoshift   = S3C2410_UFSTAT_RXSHIFT,
65         .rx_fifofull    = S3C2410_UFSTAT_RXFULL,
66         .tx_fifofull    = S3C2410_UFSTAT_TXFULL,
67         .tx_fifomask    = S3C2410_UFSTAT_TXMASK,
68         .tx_fifoshift   = S3C2410_UFSTAT_TXSHIFT,
69         .get_clksrc     = s3c2400_serial_getsource,
70         .set_clksrc     = s3c2400_serial_setsource,
71         .reset_port     = s3c2400_serial_resetport,
72 };
73
74 static int s3c2400_serial_probe(struct platform_device *dev)
75 {
76         return s3c24xx_serial_probe(dev, &s3c2400_uart_inf);
77 }
78
79 static struct platform_driver s3c2400_serial_drv = {
80         .probe          = s3c2400_serial_probe,
81         .remove         = s3c24xx_serial_remove,
82         .driver         = {
83                 .name   = "s3c2400-uart",
84                 .owner  = THIS_MODULE,
85         },
86 };
87
88 s3c24xx_console_init(&s3c2400_serial_drv, &s3c2400_uart_inf);
89
90 static inline int s3c2400_serial_init(void)
91 {
92         return s3c24xx_serial_init(&s3c2400_serial_drv, &s3c2400_uart_inf);
93 }
94
95 static inline void s3c2400_serial_exit(void)
96 {
97         platform_driver_unregister(&s3c2400_serial_drv);
98 }
99
100 module_init(s3c2400_serial_init);
101 module_exit(s3c2400_serial_exit);
102
103 MODULE_LICENSE("GPL v2");
104 MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>");
105 MODULE_DESCRIPTION("Samsung S3C2400 SoC Serial port driver");
106 MODULE_ALIAS("platform:s3c2400-uart");