Ralf Baechle | e7c4782 | 2007-07-10 17:33:01 +0100 | [diff] [blame] | 1 | /* |
| 2 | * This file is subject to the terms and conditions of the GNU General Public |
| 3 | * License. See the file "COPYING" in the main directory of this archive |
| 4 | * for more details. |
| 5 | * |
| 6 | * Copyright (C) 2007 MIPS Technologies, Inc. |
| 7 | * written by Ralf Baechle (ralf@linux-mips.org) |
| 8 | * |
Tiejun Chen | 192cc7f | 2008-11-25 16:33:20 +0800 | [diff] [blame^] | 9 | * Copyright (C) 2008 Wind River Systems, Inc. |
| 10 | * updated by Tiejun Chen <tiejun.chen@windriver.com> |
| 11 | * |
| 12 | * 1. Probe driver for the Malta's UART ports: |
Ralf Baechle | e7c4782 | 2007-07-10 17:33:01 +0100 | [diff] [blame] | 13 | * |
| 14 | * o 2 ports in the SMC SuperIO |
| 15 | * o 1 port in the CBUS UART, a discrete 16550 which normally is only used |
| 16 | * for bringups. |
| 17 | * |
| 18 | * We don't use 8250_platform.c on Malta as it would result in the CBUS |
| 19 | * UART becoming ttyS0. |
Tiejun Chen | 192cc7f | 2008-11-25 16:33:20 +0800 | [diff] [blame^] | 20 | * |
| 21 | * 2. Register RTC-CMOS platform device on Malta. |
Ralf Baechle | e7c4782 | 2007-07-10 17:33:01 +0100 | [diff] [blame] | 22 | */ |
| 23 | #include <linux/module.h> |
| 24 | #include <linux/init.h> |
| 25 | #include <linux/serial_8250.h> |
Tiejun Chen | 192cc7f | 2008-11-25 16:33:20 +0800 | [diff] [blame^] | 26 | #include <linux/mc146818rtc.h> |
| 27 | #include <linux/platform_device.h> |
Ralf Baechle | e7c4782 | 2007-07-10 17:33:01 +0100 | [diff] [blame] | 28 | |
| 29 | #define SMC_PORT(base, int) \ |
| 30 | { \ |
| 31 | .iobase = base, \ |
| 32 | .irq = int, \ |
| 33 | .uartclk = 1843200, \ |
| 34 | .iotype = UPIO_PORT, \ |
| 35 | .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST, \ |
| 36 | .regshift = 0, \ |
| 37 | } |
| 38 | |
| 39 | #define CBUS_UART_FLAGS (UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_IOREMAP) |
| 40 | |
| 41 | static struct plat_serial8250_port uart8250_data[] = { |
| 42 | SMC_PORT(0x3F8, 4), |
| 43 | SMC_PORT(0x2F8, 3), |
| 44 | { |
| 45 | .mapbase = 0x1f000900, /* The CBUS UART */ |
| 46 | .irq = MIPS_CPU_IRQ_BASE + 2, |
| 47 | .uartclk = 3686400, /* Twice the usual clk! */ |
| 48 | .iotype = UPIO_MEM32, |
| 49 | .flags = CBUS_UART_FLAGS, |
| 50 | .regshift = 3, |
| 51 | }, |
| 52 | { }, |
| 53 | }; |
| 54 | |
Tiejun Chen | 192cc7f | 2008-11-25 16:33:20 +0800 | [diff] [blame^] | 55 | static struct platform_device malta_uart8250_device = { |
Ralf Baechle | e7c4782 | 2007-07-10 17:33:01 +0100 | [diff] [blame] | 56 | .name = "serial8250", |
| 57 | .id = PLAT8250_DEV_PLATFORM2, |
| 58 | .dev = { |
| 59 | .platform_data = uart8250_data, |
| 60 | }, |
| 61 | }; |
| 62 | |
Tiejun Chen | 192cc7f | 2008-11-25 16:33:20 +0800 | [diff] [blame^] | 63 | struct resource malta_rtc_resources[] = { |
| 64 | { |
| 65 | .start = RTC_PORT(0), |
| 66 | .end = RTC_PORT(7), |
| 67 | .flags = IORESOURCE_IO, |
| 68 | }, { |
| 69 | .start = RTC_IRQ, |
| 70 | .end = RTC_IRQ, |
| 71 | .flags = IORESOURCE_IRQ, |
| 72 | } |
| 73 | }; |
| 74 | |
| 75 | static struct platform_device malta_rtc_device = { |
| 76 | .name = "rtc_cmos", |
| 77 | .id = -1, |
| 78 | .resource = malta_rtc_resources, |
| 79 | .num_resources = ARRAY_SIZE(malta_rtc_resources), |
| 80 | }; |
| 81 | |
| 82 | static struct platform_device *malta_devices[] __initdata = { |
| 83 | &malta_uart8250_device, |
| 84 | &malta_rtc_device, |
| 85 | }; |
| 86 | |
| 87 | static int __init malta_add_devices(void) |
Ralf Baechle | e7c4782 | 2007-07-10 17:33:01 +0100 | [diff] [blame] | 88 | { |
Tiejun Chen | 192cc7f | 2008-11-25 16:33:20 +0800 | [diff] [blame^] | 89 | int err; |
| 90 | |
| 91 | err = platform_add_devices(malta_devices, ARRAY_SIZE(malta_devices)); |
| 92 | if (err) |
| 93 | return err; |
| 94 | |
| 95 | /* |
| 96 | * Set RTC to BCD mode to support current alarm code. |
| 97 | */ |
| 98 | CMOS_WRITE(CMOS_READ(RTC_CONTROL) & ~RTC_DM_BINARY, RTC_CONTROL); |
| 99 | |
| 100 | return 0; |
Ralf Baechle | e7c4782 | 2007-07-10 17:33:01 +0100 | [diff] [blame] | 101 | } |
| 102 | |
Tiejun Chen | 192cc7f | 2008-11-25 16:33:20 +0800 | [diff] [blame^] | 103 | device_initcall(malta_add_devices); |