release/src-rt-6.x.4708/linux/linux-2.6.36/arch/arm/mach-gemini/devices.c

   1 /*
   2  * Common devices definition for Gemini
   3  *
   4  * Copyright (C) 2008-2009 Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10 #include <linux/kernel.h>
  11 #include <linux/init.h>
  12 #include <linux/io.h>
  13 #include <linux/platform_device.h>
  14 #include <linux/serial_8250.h>
  15 #include <linux/mtd/physmap.h>
  16
  17 #include <mach/irqs.h>
  18 #include <mach/hardware.h>
  19 #include <mach/global_reg.h>
  20
  21 static struct plat_serial8250_port serial_platform_data[] = {
  22         {
  23                 .membase        = (void *)IO_ADDRESS(GEMINI_UART_BASE),
  24                 .mapbase        = GEMINI_UART_BASE,
  25                 .irq            = IRQ_UART,
  26                 .uartclk        = UART_CLK,
  27                 .regshift       = 2,
  28                 .iotype         = UPIO_MEM,
  29                 .type           = PORT_16550A,
  30                 .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_FIXED_TYPE,
  31         },
  32         {},
  33 };
  34
  35 static struct platform_device serial_device = {
  36         .name   = "serial8250",
  37         .id     = PLAT8250_DEV_PLATFORM,
  38         .dev    = {
  39                 .platform_data = serial_platform_data,
  40         },
  41 };
  42
  43 int platform_register_uart(void)
  44 {
  45         return platform_device_register(&serial_device);
  46 }
  47
  48 static struct resource flash_resource = {
  49         .start  = GEMINI_FLASH_BASE,
  50         .flags  = IORESOURCE_MEM,
  51 };
  52
  53 static struct physmap_flash_data pflash_platform_data = {};
  54
  55 static struct platform_device pflash_device = {
  56         .name   = "physmap-flash",
  57         .id     = 0,
  58         .dev    = {
  59                 .platform_data = &pflash_platform_data,
  60         },
  61         .resource = &flash_resource,
  62         .num_resources = 1,
  63 };
  64
  65 int platform_register_pflash(unsigned int size, struct mtd_partition *parts,
  66                              unsigned int nr_parts)
  67 {
  68         unsigned int reg;
  69
  70         reg = __raw_readl(IO_ADDRESS(GEMINI_GLOBAL_BASE) + GLOBAL_STATUS);
  71
  72         if ((reg & FLASH_TYPE_MASK) != FLASH_TYPE_PARALLEL)
  73                 return -ENXIO;
  74
  75         if (reg & FLASH_WIDTH_16BIT)
  76                 pflash_platform_data.width = 2;
  77         else
  78                 pflash_platform_data.width = 1;
  79
  80         /* enable parallel flash pins and disable others */
  81         reg = __raw_readl(IO_ADDRESS(GEMINI_GLOBAL_BASE) + GLOBAL_MISC_CTRL);
  82         reg &= ~PFLASH_PADS_DISABLE;
  83         reg |= SFLASH_PADS_DISABLE | NAND_PADS_DISABLE;
  84         __raw_writel(reg, IO_ADDRESS(GEMINI_GLOBAL_BASE) + GLOBAL_MISC_CTRL);
  85
  86         flash_resource.end = flash_resource.start + size - 1;
  87
  88         pflash_platform_data.parts = parts;
  89         pflash_platform_data.nr_parts = nr_parts;
  90
  91         return platform_device_register(&pflash_device);
  92 }