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 <mach/pxa2xx_spi.h>
  28 #include <linux/can/platform/mcp251x.h>
  29
  30 #include "generic.h"
  31
  32 #define ICONTROL_MCP251x_nCS1   (15)
  33 #define ICONTROL_MCP251x_nCS2   (16)
  34 #define ICONTROL_MCP251x_nCS3   (17)
  35 #define ICONTROL_MCP251x_nCS4   (24)
  36
  37 #define ICONTROL_MCP251x_nIRQ1  (74)
  38 #define ICONTROL_MCP251x_nIRQ2  (75)
  39 #define ICONTROL_MCP251x_nIRQ3  (76)
  40 #define ICONTROL_MCP251x_nIRQ4  (77)
  41
  42 static struct pxa2xx_spi_chip mcp251x_chip_info1 = {
  43         .tx_threshold   = 8,
  44         .rx_threshold   = 128,
  45         .dma_burst_size = 8,
  46         .timeout        = 235,
  47         .gpio_cs        = ICONTROL_MCP251x_nCS1
  48 };
  49
  50 static struct pxa2xx_spi_chip mcp251x_chip_info2 = {
  51         .tx_threshold   = 8,
  52         .rx_threshold   = 128,
  53         .dma_burst_size = 8,
  54         .timeout        = 235,
  55         .gpio_cs        = ICONTROL_MCP251x_nCS2
  56 };
  57
  58 static struct pxa2xx_spi_chip mcp251x_chip_info3 = {
  59         .tx_threshold   = 8,
  60         .rx_threshold   = 128,
  61         .dma_burst_size = 8,
  62         .timeout        = 235,
  63         .gpio_cs        = ICONTROL_MCP251x_nCS3
  64 };
  65
  66 static struct pxa2xx_spi_chip mcp251x_chip_info4 = {
  67         .tx_threshold   = 8,
  68         .rx_threshold   = 128,
  69         .dma_burst_size = 8,
  70         .timeout        = 235,
  71         .gpio_cs        = ICONTROL_MCP251x_nCS4
  72 };
  73
  74 static struct mcp251x_platform_data mcp251x_info = {
  75         .oscillator_frequency = 16E6,
  76         .model                = CAN_MCP251X_MCP2515,
  77         .board_specific_setup = NULL,
  78         .power_enable         = NULL,
  79         .transceiver_enable   = NULL
  80 };
  81
  82 static struct spi_board_info mcp251x_board_info[] = {
  83         {
  84                 .modalias        = "mcp251x",
  85                 .max_speed_hz    = 6500000,
  86                 .bus_num         = 3,
  87                 .chip_select     = 0,
  88                 .platform_data   = &mcp251x_info,
  89                 .controller_data = &mcp251x_chip_info1,
  90                 .irq             = gpio_to_irq(ICONTROL_MCP251x_nIRQ1)
  91         },
  92         {
  93                 .modalias        = "mcp251x",
  94                 .max_speed_hz    = 6500000,
  95                 .bus_num         = 3,
  96                 .chip_select     = 1,
  97                 .platform_data   = &mcp251x_info,
  98                 .controller_data = &mcp251x_chip_info2,
  99                 .irq             = gpio_to_irq(ICONTROL_MCP251x_nIRQ2)
 100         },
 101         {
 102                 .modalias        = "mcp251x",
 103                 .max_speed_hz    = 6500000,
 104                 .bus_num         = 4,
 105                 .chip_select     = 0,
 106                 .platform_data   = &mcp251x_info,
 107                 .controller_data = &mcp251x_chip_info3,
 108                 .irq             = gpio_to_irq(ICONTROL_MCP251x_nIRQ3)
 109         },
 110         {
 111                 .modalias        = "mcp251x",
 112                 .max_speed_hz    = 6500000,
 113                 .bus_num         = 4,
 114                 .chip_select     = 1,
 115                 .platform_data   = &mcp251x_info,
 116                 .controller_data = &mcp251x_chip_info4,
 117                 .irq             = gpio_to_irq(ICONTROL_MCP251x_nIRQ4)
 118         }
 119 };
 120
 121 static struct pxa2xx_spi_master pxa_ssp3_spi_master_info = {
 122         .clock_enable   = CKEN_SSP3,
 123         .num_chipselect = 2,
 124         .enable_dma     = 1
 125 };
 126
 127 static struct pxa2xx_spi_master pxa_ssp4_spi_master_info = {
 128         .clock_enable   = CKEN_SSP4,
 129         .num_chipselect = 2,
 130         .enable_dma     = 1
 131 };
 132
 133 struct platform_device pxa_spi_ssp3 = {
 134         .name          = "pxa2xx-spi",
 135         .id            = 3,
 136         .dev           = {
 137                 .platform_data = &pxa_ssp3_spi_master_info,
 138         }
 139 };
 140
 141 struct platform_device pxa_spi_ssp4 = {
 142         .name          = "pxa2xx-spi",
 143         .id            = 4,
 144         .dev           = {
 145                 .platform_data = &pxa_ssp4_spi_master_info,
 146         }
 147 };
 148
 149 static struct platform_device *icontrol_spi_devices[] __initdata = {
 150         &pxa_spi_ssp3,
 151         &pxa_spi_ssp4,
 152 };
 153
 154 static mfp_cfg_t mfp_can_cfg[] __initdata = {
 155         /* CAN CS lines */
 156         GPIO15_GPIO,
 157         GPIO16_GPIO,
 158         GPIO17_GPIO,
 159         GPIO24_GPIO,
 160
 161         /* SPI (SSP3) lines */
 162         GPIO89_SSP3_SCLK,
 163         GPIO91_SSP3_TXD,
 164         GPIO92_SSP3_RXD,
 165
 166         /* SPI (SSP4) lines */
 167         GPIO93_SSP4_SCLK,
 168         GPIO95_SSP4_TXD,
 169         GPIO96_SSP4_RXD,
 170
 171         /* CAN nIRQ lines */
 172         GPIO74_GPIO | MFP_LPM_EDGE_RISE,
 173         GPIO75_GPIO | MFP_LPM_EDGE_RISE,
 174         GPIO76_GPIO | MFP_LPM_EDGE_RISE,
 175         GPIO77_GPIO | MFP_LPM_EDGE_RISE
 176 };
 177
 178 static void __init icontrol_can_init(void)
 179 {
 180         pxa3xx_mfp_config(ARRAY_AND_SIZE(mfp_can_cfg));
 181         platform_add_devices(ARRAY_AND_SIZE(icontrol_spi_devices));
 182         spi_register_board_info(ARRAY_AND_SIZE(mcp251x_board_info));
 183 }
 184
 185 static void __init icontrol_init(void)
 186 {
 187         mxm_8x10_barebones_init();
 188         mxm_8x10_usb_host_init();
 189         mxm_8x10_mmc_init();
 190
 191         icontrol_can_init();
 192 }
 193
 194 MACHINE_START(ICONTROL, "iControl/SafeTcam boards using Embedian MXM-8x10 CoM")
 195         .phys_io        = 0x40000000,
 196         .boot_params    = 0xa0000100,
 197         .io_pg_offst    = (io_p2v(0x40000000) >> 18) & 0xfffc,
 198         .map_io         = pxa_map_io,
 199         .init_irq       = pxa3xx_init_irq,
 200         .timer          = &pxa_timer,
 201         .init_machine   = icontrol_init
 202 MACHINE_END