diff options
Diffstat (limited to 'drivers/serial/s3c24a0.c')
-rw-r--r-- | drivers/serial/s3c24a0.c | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/drivers/serial/s3c24a0.c b/drivers/serial/s3c24a0.c new file mode 100644 index 000000000000..ebf2fd3c8f7d --- /dev/null +++ b/drivers/serial/s3c24a0.c | |||
@@ -0,0 +1,118 @@ | |||
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 <sandeep.patil@azingo.com> | ||
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, | ||
97 | .remove = s3c24xx_serial_remove, | ||
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 | |||