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