arch/arm/mach-pxa/pcm027.c

   1 /*
   2  *  linux/arch/arm/mach-pxa/pcm027.c
   3  *  Support for the Phytec phyCORE-PXA270 CPU card (aka PCM-027).
   4  *
   5  *  Refer
   6  *   http://www.phytec.com/products/sbc/ARM-XScale/phyCORE-XScale-PXA270.html
   7  *  for additional hardware info
   8  *
   9  *  Author:     Juergen Kilb
  10  *  Created:    April 05, 2005
  11  *  Copyright:  Phytec Messtechnik GmbH
  12  *  e-Mail:     armlinux@phytec.de
  13  *
  14  *  based on Intel Mainstone Board
  15  *
  16  *  Copyright 2007 Juergen Beisert @ Pengutronix (j.beisert@pengutronix.de)
  17  *
  18  *  This program is free software; you can redistribute it and/or modify
  19  *  it under the terms of the GNU General Public License version 2 as
  20  *  published by the Free Software Foundation.
  21  */
  22
  23 #include <linux/irq.h>
  24 #include <linux/platform_device.h>
  25 #include <linux/mtd/physmap.h>
  26 #include <linux/spi/spi.h>
  27 #include <linux/leds.h>
  28 #include <asm/mach-types.h>
  29 #include <asm/mach/arch.h>
  30 #include <asm/arch/hardware.h>
  31 #include <asm/arch/pxa-regs.h>
  32 #include <asm/arch/pxa2xx-gpio.h>
  33 #include <asm/arch/pxa2xx-regs.h>
  34 #include <asm/arch/pxa2xx_spi.h>
  35 #include <asm/arch/pcm027.h>
  36 #include "generic.h"
  37
  38 /*
  39  * ABSTRACT:
  40  *
  41  * The PXA270 processor comes with a bunch of hardware on its silicon.
  42  * Not all of this hardware can be used at the same time and not all
  43  * is routed to module's connectors. Also it depends on the baseboard, what
  44  * kind of hardware can be used in which way.
  45  * -> So this file supports the main devices on the CPU card only!
  46  * Refer pcm990-baseboard.c how to extend this features to get a full
  47  * blown system with many common interfaces.
  48  *
  49  * The PCM-027 supports the following interfaces through its connectors and
  50  * will be used in pcm990-baseboard.c:
  51  *
  52  * - LCD support
  53  * - MMC support
  54  * - IDE/CF card
  55  * - FFUART
  56  * - BTUART
  57  * - IRUART
  58  * - AC97
  59  * - SSP
  60  * - SSP3
  61  *
  62  * Claimed GPIOs:
  63  * GPIO0 -> IRQ input from RTC
  64  * GPIO2 -> SYS_ENA*)
  65  * GPIO3 -> PWR_SCL
  66  * GPIO4 -> PWR_SDA
  67  * GPIO5 -> PowerCap0*)
  68  * GPIO6 -> PowerCap1*)
  69  * GPIO7 -> PowerCap2*)
  70  * GPIO8 -> PowerCap3*)
  71  * GPIO15 -> /CS1
  72  * GPIO20 -> /CS2
  73  * GPIO21 -> /CS3
  74  * GPIO33 -> /CS5 network controller select
  75  * GPIO52 -> IRQ from network controller
  76  * GPIO78 -> /CS2
  77  * GPIO80 -> /CS4
  78  * GPIO90 -> LED0
  79  * GPIO91 -> LED1
  80  * GPIO114 -> IRQ from CAN controller
  81  * GPIO117 -> SCL
  82  * GPIO118 -> SDA
  83  *
  84  * *) CPU internal use only
  85  */
  86
  87 /*
  88  * SMC91x network controller specific stuff
  89  */
  90 static struct resource smc91x_resources[] = {
  91         [0] = {
  92                 .start  = PCM027_ETH_PHYS + 0x300,
  93                 .end    = PCM027_ETH_PHYS + PCM027_ETH_SIZE,
  94                 .flags  = IORESOURCE_MEM,
  95         },
  96         [1] = {
  97                 .start  = PCM027_ETH_IRQ,
  98                 .end    = PCM027_ETH_IRQ,
  99                 /* note: smc91x's driver doesn't use the trigger bits yet */
 100                 .flags  = IORESOURCE_IRQ | PCM027_ETH_IRQ_EDGE,
 101         }
 102 };
 103
 104 static struct platform_device smc91x_device = {
 105         .name           = "smc91x",
 106         .id             = 0,
 107         .num_resources  = ARRAY_SIZE(smc91x_resources),
 108         .resource       = smc91x_resources,
 109 };
 110
 111 static struct physmap_flash_data pcm027_flash_data = {
 112         .width  = 4,
 113 };
 114
 115 static struct resource pcm027_flash_resource = {
 116         .start          = PCM027_FLASH_PHYS,
 117         .end            = PCM027_FLASH_PHYS + PCM027_FLASH_SIZE - 1 ,
 118         .flags          = IORESOURCE_MEM,
 119 };
 120
 121 static struct platform_device pcm027_flash = {
 122         .name           = "physmap-flash",
 123         .id             = 0,
 124         .dev            = {
 125                 .platform_data  = &pcm027_flash_data,
 126         },
 127         .resource       = &pcm027_flash_resource,
 128         .num_resources  = 1,
 129 };
 130
 131 #ifdef CONFIG_LEDS_GPIO
 132
 133 static struct gpio_led pcm027_led[] = {
 134         {
 135                 .name = "led0:red",     /* FIXME */
 136                 .gpio = PCM027_LED_CPU
 137         },
 138         {
 139                 .name = "led1:green",   /* FIXME */
 140                 .gpio = PCM027_LED_HEARD_BEAT
 141         },
 142 };
 143
 144 static struct gpio_led_platform_data pcm027_led_data = {
 145         .num_leds       = ARRAY_SIZE(pcm027_led),
 146         .leds           = pcm027_led
 147 };
 148
 149 static struct platform_device pcm027_led_dev = {
 150         .name           = "leds-gpio",
 151         .id             = 0,
 152         .dev            = {
 153                 .platform_data  = &pcm027_led_data,
 154         },
 155 };
 156
 157 #endif /* CONFIG_LEDS_GPIO */
 158
 159 /*
 160  * declare the available device resources on this board
 161  */
 162 static struct platform_device *devices[] __initdata = {
 163         &smc91x_device,
 164         &pcm027_flash,
 165 #ifdef CONFIG_LEDS_GPIO
 166         &pcm027_led_dev
 167 #endif
 168 };
 169
 170 /*
 171  * pcm027_init - breath some life into the board
 172  */
 173 static void __init pcm027_init(void)
 174 {
 175         /* system bus arbiter setting
 176          * - Core_Park
 177          * - LCD_wt:DMA_wt:CORE_Wt = 2:3:4
 178          */
 179         ARB_CNTRL = ARB_CORE_PARK | 0x234;
 180
 181         platform_add_devices(devices, ARRAY_SIZE(devices));
 182
 183         /* LEDs (on demand only) */
 184 #ifdef CONFIG_LEDS_GPIO
 185         pxa_gpio_mode(PCM027_LED_CPU | GPIO_OUT);
 186         pxa_gpio_mode(PCM027_LED_HEARD_BEAT | GPIO_OUT);
 187 #endif /* CONFIG_LEDS_GPIO */
 188
 189         /* at last call the baseboard to initialize itself */
 190 #ifdef CONFIG_MACH_PCM990_BASEBOARD
 191         pcm990_baseboard_init();
 192 #endif
 193 }
 194
 195 static void __init pcm027_map_io(void)
 196 {
 197         pxa_map_io();
 198
 199         /* initialize sleep mode regs (wake-up sources, etc) */
 200         PGSR0 = 0x01308000;
 201         PGSR1 = 0x00CF0002;
 202         PGSR2 = 0x0E294000;
 203         PGSR3 = 0x0000C000;
 204         PWER  = 0x40000000 | PWER_GPIO0 | PWER_GPIO1;
 205         PRER  = 0x00000000;
 206         PFER  = 0x00000003;
 207 }
 208
 209 MACHINE_START(PCM027, "Phytec Messtechnik GmbH phyCORE-PXA270")
 210         /* Maintainer: Pengutronix */
 211         .boot_params    = 0xa0000100,
 212         .phys_io        = 0x40000000,
 213         .io_pg_offst    = (io_p2v(0x40000000) >> 18) & 0xfffc,
 214         .map_io         = pcm027_map_io,
 215         .init_irq       = pxa27x_init_irq,
 216         .timer          = &pxa_timer,
 217         .init_machine   = pcm027_init,
 218 MACHINE_END