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