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         = IS_ENABLED(CONFIG_CPU_BIG_ENDIAN) ?
  56                                   UPIO_MEM32BE : UPIO_MEM32,
  57                 .flags          = CBUS_UART_FLAGS,
  58                 .regshift       = 3,
  59         },
  60 #endif
  61         { },
  62 };
  63
  64 static struct platform_device malta_uart8250_device = {
  65         .name                   = "serial8250",
  66         .id                     = PLAT8250_DEV_PLATFORM,
  67         .dev                    = {
  68                 .platform_data  = uart8250_data,
  69         },
  70 };
  71
  72 struct resource malta_rtc_resources[] = {
  73         {
  74                 .start  = RTC_PORT(0),
  75                 .end    = RTC_PORT(7),
  76                 .flags  = IORESOURCE_IO,
  77         }, {
  78                 .start  = RTC_IRQ,
  79                 .end    = RTC_IRQ,
  80                 .flags  = IORESOURCE_IRQ,
  81         }
  82 };
  83
  84 static struct platform_device malta_rtc_device = {
  85         .name           = "rtc_cmos",
  86         .id             = -1,
  87         .resource       = malta_rtc_resources,
  88         .num_resources  = ARRAY_SIZE(malta_rtc_resources),
  89 };
  90
  91 static struct mtd_partition malta_mtd_partitions[] = {
  92         {
  93                 .name =         "YAMON",
  94                 .offset =       0x0,
  95                 .size =         0x100000,
  96                 .mask_flags =   MTD_WRITEABLE
  97         }, {
  98                 .name =         "User FS",
  99                 .offset =       0x100000,
 100                 .size =         0x2e0000
 101         }, {
 102                 .name =         "Board Config",
 103                 .offset =       0x3e0000,
 104                 .size =         0x020000,
 105                 .mask_flags =   MTD_WRITEABLE
 106         }
 107 };
 108
 109 static struct physmap_flash_data malta_flash_data = {
 110         .width          = 4,
 111         .nr_parts       = ARRAY_SIZE(malta_mtd_partitions),
 112         .parts          = malta_mtd_partitions
 113 };
 114
 115 static struct resource malta_flash_resource = {
 116         .start          = 0x1e000000,
 117         .end            = 0x1e3fffff,
 118         .flags          = IORESOURCE_MEM
 119 };
 120
 121 static struct platform_device malta_flash_device = {
 122         .name           = "physmap-flash",
 123         .id             = 0,
 124         .dev            = {
 125                 .platform_data  = &malta_flash_data,
 126         },
 127         .num_resources  = 1,
 128         .resource       = &malta_flash_resource,
 129 };
 130
 131 static struct platform_device *malta_devices[] __initdata = {
 132         &malta_uart8250_device,
 133         &malta_rtc_device,
 134         &malta_flash_device,
 135 };
 136
 137 static int __init malta_add_devices(void)
 138 {
 139         int err;
 140
 141         err = platform_add_devices(malta_devices, ARRAY_SIZE(malta_devices));
 142         if (err)
 143                 return err;
 144
 145         return 0;
 146 }
 147
 148 device_initcall(malta_add_devices);