arch/arm/mach-pxa/icontrol.c

   1 /*
   2  * linux/arch/arm/mach-pxa/icontrol.c
   3  *
   4  * Support for the iControl and SafeTcam platforms from TMT Services
   5  * using the Embedian MXM-8x10 Computer on Module
   6  *
   7  * Copyright (C) 2009 TMT Services & Supplies (Pty) Ltd.
   8  *
   9  * 2010-01-21 Hennie van der Merve <hvdmerwe@tmtservies.co.za>
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License version 2 as
  13  * published by the Free Software Foundation.
  14  */
  15
  16 #include <linux/irq.h>
  17 #include <linux/platform_device.h>
  18 #include <linux/gpio.h>
  19
  20 #include <asm/mach-types.h>
  21 #include <asm/mach/arch.h>
  22
  23 #include <mach/pxa320.h>
  24 #include <mach/mxm8x10.h>
  25
  26 #include <linux/spi/spi.h>
  27 #include <linux/spi/pxa2xx_spi.h>
  28 #include <linux/can/platform/mcp251x.h>
  29 #include <linux/regulator/machine.h>
  30
  31 #include "generic.h"
  32
  33 #define ICONTROL_MCP251x_nCS1   (15)
  34 #define ICONTROL_MCP251x_nCS2   (16)
  35 #define ICONTROL_MCP251x_nCS3   (17)
  36 #define ICONTROL_MCP251x_nCS4   (24)
  37
  38 #define ICONTROL_MCP251x_nIRQ1  (74)
  39 #define ICONTROL_MCP251x_nIRQ2  (75)
  40 #define ICONTROL_MCP251x_nIRQ3  (76)
  41 #define ICONTROL_MCP251x_nIRQ4  (77)
  42
  43 static struct pxa2xx_spi_chip mcp251x_chip_info1 = {
  44         .tx_threshold   = 8,
  45         .rx_threshold   = 128,
  46         .dma_burst_size = 8,
  47         .timeout        = 235,
  48         .gpio_cs        = ICONTROL_MCP251x_nCS1
  49 };
  50
  51 static struct pxa2xx_spi_chip mcp251x_chip_info2 = {
  52         .tx_threshold   = 8,
  53         .rx_threshold   = 128,
  54         .dma_burst_size = 8,
  55         .timeout        = 235,
  56         .gpio_cs        = ICONTROL_MCP251x_nCS2
  57 };
  58
  59 static struct pxa2xx_spi_chip mcp251x_chip_info3 = {
  60         .tx_threshold   = 8,
  61         .rx_threshold   = 128,
  62         .dma_burst_size = 8,
  63         .timeout        = 235,
  64         .gpio_cs        = ICONTROL_MCP251x_nCS3
  65 };
  66
  67 static struct pxa2xx_spi_chip mcp251x_chip_info4 = {
  68         .tx_threshold   = 8,
  69         .rx_threshold   = 128,
  70         .dma_burst_size = 8,
  71         .timeout        = 235,
  72         .gpio_cs        = ICONTROL_MCP251x_nCS4
  73 };
  74
  75 static struct mcp251x_platform_data mcp251x_info = {
  76         .oscillator_frequency = 16E6,
  77 };
  78
  79 static struct spi_board_info mcp251x_board_info[] = {
  80         {
  81                 .modalias        = "mcp2515",
  82                 .max_speed_hz    = 6500000,
  83                 .bus_num         = 3,
  84                 .chip_select     = 0,
  85                 .platform_data   = &mcp251x_info,
  86                 .controller_data = &mcp251x_chip_info1,
  87                 .irq             = PXA_GPIO_TO_IRQ(ICONTROL_MCP251x_nIRQ1)
  88         },
  89         {
  90                 .modalias        = "mcp2515",
  91                 .max_speed_hz    = 6500000,
  92                 .bus_num         = 3,
  93                 .chip_select     = 1,
  94                 .platform_data   = &mcp251x_info,
  95                 .controller_data = &mcp251x_chip_info2,
  96                 .irq             = PXA_GPIO_TO_IRQ(ICONTROL_MCP251x_nIRQ2)
  97         },
  98         {
  99                 .modalias        = "mcp2515",
 100                 .max_speed_hz    = 6500000,
 101                 .bus_num         = 4,
 102                 .chip_select     = 0,
 103                 .platform_data   = &mcp251x_info,
 104                 .controller_data = &mcp251x_chip_info3,
 105                 .irq             = PXA_GPIO_TO_IRQ(ICONTROL_MCP251x_nIRQ3)
 106         },
 107         {
 108                 .modalias        = "mcp2515",
 109                 .max_speed_hz    = 6500000,
 110                 .bus_num         = 4,
 111                 .chip_select     = 1,
 112                 .platform_data   = &mcp251x_info,
 113                 .controller_data = &mcp251x_chip_info4,
 114                 .irq             = PXA_GPIO_TO_IRQ(ICONTROL_MCP251x_nIRQ4)
 115         }
 116 };
 117
 118 static struct pxa2xx_spi_master pxa_ssp3_spi_master_info = {
 119         .num_chipselect = 2,
 120         .enable_dma     = 1
 121 };
 122
 123 static struct pxa2xx_spi_master pxa_ssp4_spi_master_info = {
 124         .num_chipselect = 2,
 125         .enable_dma     = 1
 126 };
 127
 128 struct platform_device pxa_spi_ssp3 = {
 129         .name          = "pxa2xx-spi",
 130         .id            = 3,
 131         .dev           = {
 132                 .platform_data = &pxa_ssp3_spi_master_info,
 133         }
 134 };
 135
 136 struct platform_device pxa_spi_ssp4 = {
 137         .name          = "pxa2xx-spi",
 138         .id            = 4,
 139         .dev           = {
 140                 .platform_data = &pxa_ssp4_spi_master_info,
 141         }
 142 };
 143
 144 static struct platform_device *icontrol_spi_devices[] __initdata = {
 145         &pxa_spi_ssp3,
 146         &pxa_spi_ssp4,
 147 };
 148
 149 static mfp_cfg_t mfp_can_cfg[] __initdata = {
 150         /* CAN CS lines */
 151         GPIO15_GPIO,
 152         GPIO16_GPIO,
 153         GPIO17_GPIO,
 154         GPIO24_GPIO,
 155
 156         /* SPI (SSP3) lines */
 157         GPIO89_SSP3_SCLK,
 158         GPIO91_SSP3_TXD,
 159         GPIO92_SSP3_RXD,
 160
 161         /* SPI (SSP4) lines */
 162         GPIO93_SSP4_SCLK,
 163         GPIO95_SSP4_TXD,
 164         GPIO96_SSP4_RXD,
 165
 166         /* CAN nIRQ lines */
 167         GPIO74_GPIO | MFP_LPM_EDGE_RISE,
 168         GPIO75_GPIO | MFP_LPM_EDGE_RISE,
 169         GPIO76_GPIO | MFP_LPM_EDGE_RISE,
 170         GPIO77_GPIO | MFP_LPM_EDGE_RISE
 171 };
 172
 173 static void __init icontrol_can_init(void)
 174 {
 175         pxa3xx_mfp_config(ARRAY_AND_SIZE(mfp_can_cfg));
 176         platform_add_devices(ARRAY_AND_SIZE(icontrol_spi_devices));
 177         spi_register_board_info(ARRAY_AND_SIZE(mcp251x_board_info));
 178 }
 179
 180 static void __init icontrol_init(void)
 181 {
 182         mxm_8x10_barebones_init();
 183         mxm_8x10_usb_host_init();
 184         mxm_8x10_mmc_init();
 185
 186         icontrol_can_init();
 187
 188         regulator_has_full_constraints();
 189 }
 190
 191 MACHINE_START(ICONTROL, "iControl/SafeTcam boards using Embedian MXM-8x10 CoM")
 192         .atag_offset    = 0x100,
 193         .map_io         = pxa3xx_map_io,
 194         .nr_irqs        = PXA_NR_IRQS,
 195         .init_irq       = pxa3xx_init_irq,
 196         .handle_irq     = pxa3xx_handle_irq,
 197         .init_time      = pxa_timer_init,
 198         .init_machine   = icontrol_init,
 199         .restart        = pxa_restart,
 200 MACHINE_END