kernel/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 <asm/mips-boards/maltaint.h>
  33 #include <mtd/mtd-abi.h>
  34
  35 #define SMC_PORT(base, int)                                             \
  36 {                                                                       \
  37         .iobase         = base,                                         \
  38         .irq            = int,                                          \
  39         .uartclk        = 1843200,                                      \
  40         .iotype         = UPIO_PORT,                                    \
  41         .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,            \
  42         .regshift       = 0,                                            \
  43 }
  44
  45 #define CBUS_UART_FLAGS (UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_IOREMAP)
  46
  47 static struct plat_serial8250_port uart8250_data[] = {
  48         SMC_PORT(0x3F8, 4),
  49         SMC_PORT(0x2F8, 3),
  50 #ifndef CONFIG_MIPS_CMP
  51         {
  52                 .mapbase        = 0x1f000900,   /* The CBUS UART */
  53                 .irq            = MIPS_CPU_IRQ_BASE + MIPSCPU_INT_MB2,
  54                 .uartclk        = 3686400,      /* Twice the usual clk! */
  55                 .iotype         = UPIO_MEM32,
  56                 .flags          = CBUS_UART_FLAGS,
  57                 .regshift       = 3,
  58         },
  59 #endif
  60         { },
  61 };
  62
  63 static struct platform_device malta_uart8250_device = {
  64         .name                   = "serial8250",
  65         .id                     = PLAT8250_DEV_PLATFORM,
  66         .dev                    = {
  67                 .platform_data  = uart8250_data,
  68         },
  69 };
  70
  71 struct resource malta_rtc_resources[] = {
  72         {
  73                 .start  = RTC_PORT(0),
  74                 .end    = RTC_PORT(7),
  75                 .flags  = IORESOURCE_IO,
  76         }, {
  77                 .start  = RTC_IRQ,
  78                 .end    = RTC_IRQ,
  79                 .flags  = IORESOURCE_IRQ,
  80         }
  81 };
  82
  83 static struct platform_device malta_rtc_device = {
  84         .name           = "rtc_cmos",
  85         .id             = -1,
  86         .resource       = malta_rtc_resources,
  87         .num_resources  = ARRAY_SIZE(malta_rtc_resources),
  88 };
  89
  90 static struct mtd_partition malta_mtd_partitions[] = {
  91         {
  92                 .name =         "YAMON",
  93                 .offset =       0x0,
  94                 .size =         0x100000,
  95                 .mask_flags =   MTD_WRITEABLE
  96         }, {
  97                 .name =         "User FS",
  98                 .offset =       0x100000,
  99                 .size =         0x2e0000
 100         }, {
 101                 .name =         "Board Config",
 102                 .offset =       0x3e0000,
 103                 .size =         0x020000,
 104                 .mask_flags =   MTD_WRITEABLE
 105         }
 106 };
 107
 108 static struct physmap_flash_data malta_flash_data = {
 109         .width          = 4,
 110         .nr_parts       = ARRAY_SIZE(malta_mtd_partitions),
 111         .parts          = malta_mtd_partitions
 112 };
 113
 114 static struct resource malta_flash_resource = {
 115         .start          = 0x1e000000,
 116         .end            = 0x1e3fffff,
 117         .flags          = IORESOURCE_MEM
 118 };
 119
 120 static struct platform_device malta_flash_device = {
 121         .name           = "physmap-flash",
 122         .id             = 0,
 123         .dev            = {
 124                 .platform_data  = &malta_flash_data,
 125         },
 126         .num_resources  = 1,
 127         .resource       = &malta_flash_resource,
 128 };
 129
 130 static struct platform_device *malta_devices[] __initdata = {
 131         &malta_uart8250_device,
 132         &malta_rtc_device,
 133         &malta_flash_device,
 134 };
 135
 136 static int __init malta_add_devices(void)
 137 {
 138         int err;
 139
 140         err = platform_add_devices(malta_devices, ARRAY_SIZE(malta_devices));
 141         if (err)
 142                 return err;
 143
 144         return 0;
 145 }
 146
 147 device_initcall(malta_add_devices);