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) 2006, 07 MIPS Technologies, Inc. 7 * written by Ralf Baechle (ralf@linux-mips.org) 8 * written by Ralf Baechle <ralf@linux-mips.org> 9 * 10 * Copyright (C) 2008 Wind River Systems, Inc. 11 * updated by Tiejun Chen <tiejun.chen@windriver.com> 12 * 13 * 1. Probe driver for the Malta's UART ports: 14 * 15 * o 2 ports in the SMC SuperIO 16 * o 1 port in the CBUS UART, a discrete 16550 which normally is only used 17 * for bringups. 18 * 19 * We don't use 8250_platform.c on Malta as it would result in the CBUS 20 * UART becoming ttyS0. 21 * 22 * 2. Register RTC-CMOS platform device on Malta. 23 */ 24 #include <linux/init.h> 25 #include <linux/serial_8250.h> 26 #include <linux/mc146818rtc.h> 27 #include <linux/module.h> 28 #include <linux/irq.h> 29 #include <linux/mtd/partitions.h> 30 #include <linux/mtd/physmap.h> 31 #include <linux/platform_device.h> 32 #include <mtd/mtd-abi.h> 33 34 #define SMC_PORT(base, int) \ 35 { \ 36 .iobase = base, \ 37 .irq = int, \ 38 .uartclk = 1843200, \ 39 .iotype = UPIO_PORT, \ 40 .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST, \ 41 .regshift = 0, \ 42 } 43 44 #define CBUS_UART_FLAGS (UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_IOREMAP) 45 46 static struct plat_serial8250_port uart8250_data[] = { 47 SMC_PORT(0x3F8, 4), 48 SMC_PORT(0x2F8, 3), 49 { 50 .mapbase = 0x1f000900, /* The CBUS UART */ 51 .irq = MIPS_CPU_IRQ_BASE + 2, 52 .uartclk = 3686400, /* Twice the usual clk! */ 53 .iotype = UPIO_MEM32, 54 .flags = CBUS_UART_FLAGS, 55 .regshift = 3, 56 }, 57 { }, 58 }; 59 60 static struct platform_device malta_uart8250_device = { 61 .name = "serial8250", 62 .id = PLAT8250_DEV_PLATFORM, 63 .dev = { 64 .platform_data = uart8250_data, 65 }, 66 }; 67 68 struct resource malta_rtc_resources[] = { 69 { 70 .start = RTC_PORT(0), 71 .end = RTC_PORT(7), 72 .flags = IORESOURCE_IO, 73 }, { 74 .start = RTC_IRQ, 75 .end = RTC_IRQ, 76 .flags = IORESOURCE_IRQ, 77 } 78 }; 79 80 static struct platform_device malta_rtc_device = { 81 .name = "rtc_cmos", 82 .id = -1, 83 .resource = malta_rtc_resources, 84 .num_resources = ARRAY_SIZE(malta_rtc_resources), 85 }; 86 87 static struct mtd_partition malta_mtd_partitions[] = { 88 { 89 .name = "YAMON", 90 .offset = 0x0, 91 .size = 0x100000, 92 .mask_flags = MTD_WRITEABLE 93 }, { 94 .name = "User FS", 95 .offset = 0x100000, 96 .size = 0x2e0000 97 }, { 98 .name = "Board Config", 99 .offset = 0x3e0000, 100 .size = 0x020000, 101 .mask_flags = MTD_WRITEABLE 102 } 103 }; 104 105 static struct physmap_flash_data malta_flash_data = { 106 .width = 4, 107 .nr_parts = ARRAY_SIZE(malta_mtd_partitions), 108 .parts = malta_mtd_partitions 109 }; 110 111 static struct resource malta_flash_resource = { 112 .start = 0x1e000000, 113 .end = 0x1e3fffff, 114 .flags = IORESOURCE_MEM 115 }; 116 117 static struct platform_device malta_flash_device = { 118 .name = "physmap-flash", 119 .id = 0, 120 .dev = { 121 .platform_data = &malta_flash_data, 122 }, 123 .num_resources = 1, 124 .resource = &malta_flash_resource, 125 }; 126 127 static struct platform_device *malta_devices[] __initdata = { 128 &malta_uart8250_device, 129 &malta_rtc_device, 130 &malta_flash_device, 131 }; 132 133 static int __init malta_add_devices(void) 134 { 135 int err; 136 137 err = platform_add_devices(malta_devices, ARRAY_SIZE(malta_devices)); 138 if (err) 139 return err; 140 141 /* 142 * Set RTC to BCD mode to support current alarm code. 143 */ 144 CMOS_WRITE(CMOS_READ(RTC_CONTROL) & ~RTC_DM_BINARY, RTC_CONTROL); 145 146 return 0; 147 } 148 149 device_initcall(malta_add_devices); 150