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/module.h>
  27 #include <linux/irq.h>
  28 #include <linux/mtd/partitions.h>
  29 #include <linux/mtd/physmap.h>
  30 #include <linux/platform_device.h>
  31 #include <asm/mips-boards/maltaint.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 #ifndef CONFIG_MIPS_CMP
  50         {
  51                 .mapbase        = 0x1f000900,   /* The CBUS UART */
  52                 .irq            = MIPS_CPU_IRQ_BASE + MIPSCPU_INT_MB2,
  53                 .uartclk        = 3686400,      /* Twice the usual clk! */
  54                 .iotype         = UPIO_MEM32,
  55                 .flags          = CBUS_UART_FLAGS,
  56                 .regshift       = 3,
  57         },
  58 #endif
  59         { },
  60 };
  61
  62 static struct platform_device malta_uart8250_device = {
  63         .name                   = "serial8250",
  64         .id                     = PLAT8250_DEV_PLATFORM,
  65         .dev                    = {
  66                 .platform_data  = uart8250_data,
  67         },
  68 };
  69
  70 static struct mtd_partition malta_mtd_partitions[] = {
  71         {
  72                 .name =         "YAMON",
  73                 .offset =       0x0,
  74                 .size =         0x100000,
  75                 .mask_flags =   MTD_WRITEABLE
  76         }, {
  77                 .name =         "User FS",
  78                 .offset =       0x100000,
  79                 .size =         0x2e0000
  80         }, {
  81                 .name =         "Board Config",
  82                 .offset =       0x3e0000,
  83                 .size =         0x020000,
  84                 .mask_flags =   MTD_WRITEABLE
  85         }
  86 };
  87
  88 static struct physmap_flash_data malta_flash_data = {
  89         .width          = 4,
  90         .nr_parts       = ARRAY_SIZE(malta_mtd_partitions),
  91         .parts          = malta_mtd_partitions
  92 };
  93
  94 static struct resource malta_flash_resource = {
  95         .start          = 0x1e000000,
  96         .end            = 0x1e3fffff,
  97         .flags          = IORESOURCE_MEM
  98 };
  99
 100 static struct platform_device malta_flash_device = {
 101         .name           = "physmap-flash",
 102         .id             = 0,
 103         .dev            = {
 104                 .platform_data  = &malta_flash_data,
 105         },
 106         .num_resources  = 1,
 107         .resource       = &malta_flash_resource,
 108 };
 109
 110 static struct platform_device *malta_devices[] __initdata = {
 111         &malta_uart8250_device,
 112         &malta_flash_device,
 113 };
 114
 115 static int __init malta_add_devices(void)
 116 {
 117         return platform_add_devices(malta_devices, ARRAY_SIZE(malta_devices));
 118 }
 119
 120 device_initcall(malta_add_devices);