arch/mips/mti-malta/malta-platform.c

   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);