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
  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         .board_specific_setup = NULL,
  77         .power_enable         = NULL,
  78         .transceiver_enable   = NULL
  79 };
  80
  81 static struct spi_board_info mcp251x_board_info[] = {
  82         {
  83                 .modalias        = "mcp2515",
  84                 .max_speed_hz    = 6500000,
  85                 .bus_num         = 3,
  86                 .chip_select     = 0,
  87                 .platform_data   = &mcp251x_info,
  88                 .controller_data = &mcp251x_chip_info1,
  89                 .irq             = gpio_to_irq(ICONTROL_MCP251x_nIRQ1)
  90         },
  91         {
  92                 .modalias        = "mcp2515",
  93                 .max_speed_hz    = 6500000,
  94                 .bus_num         = 3,
  95                 .chip_select     = 1,
  96                 .platform_data   = &mcp251x_info,
  97                 .controller_data = &mcp251x_chip_info2,
  98                 .irq             = gpio_to_irq(ICONTROL_MCP251x_nIRQ2)
  99         },
 100         {
 101                 .modalias        = "mcp2515",
 102                 .max_speed_hz    = 6500000,
 103                 .bus_num         = 4,
 104                 .chip_select     = 0,
 105                 .platform_data   = &mcp251x_info,
 106                 .controller_data = &mcp251x_chip_info3,
 107                 .irq             = gpio_to_irq(ICONTROL_MCP251x_nIRQ3)
 108         },
 109         {
 110                 .modalias        = "mcp2515",
 111                 .max_speed_hz    = 6500000,
 112                 .bus_num         = 4,
 113                 .chip_select     = 1,
 114                 .platform_data   = &mcp251x_info,
 115                 .controller_data = &mcp251x_chip_info4,
 116                 .irq             = gpio_to_irq(ICONTROL_MCP251x_nIRQ4)
 117         }
 118 };
 119
 120 static struct pxa2xx_spi_master pxa_ssp3_spi_master_info = {
 121         .clock_enable   = CKEN_SSP3,
 122         .num_chipselect = 2,
 123         .enable_dma     = 1
 124 };
 125
 126 static struct pxa2xx_spi_master pxa_ssp4_spi_master_info = {
 127         .clock_enable   = CKEN_SSP4,
 128         .num_chipselect = 2,
 129         .enable_dma     = 1
 130 };
 131
 132 struct platform_device pxa_spi_ssp3 = {
 133         .name          = "pxa2xx-spi",
 134         .id            = 3,
 135         .dev           = {
 136                 .platform_data = &pxa_ssp3_spi_master_info,
 137         }
 138 };
 139
 140 struct platform_device pxa_spi_ssp4 = {
 141         .name          = "pxa2xx-spi",
 142         .id            = 4,
 143         .dev           = {
 144                 .platform_data = &pxa_ssp4_spi_master_info,
 145         }
 146 };
 147
 148 static struct platform_device *icontrol_spi_devices[] __initdata = {
 149         &pxa_spi_ssp3,
 150         &pxa_spi_ssp4,
 151 };
 152
 153 static mfp_cfg_t mfp_can_cfg[] __initdata = {
 154         /* CAN CS lines */
 155         GPIO15_GPIO,
 156         GPIO16_GPIO,
 157         GPIO17_GPIO,
 158         GPIO24_GPIO,
 159
 160         /* SPI (SSP3) lines */
 161         GPIO89_SSP3_SCLK,
 162         GPIO91_SSP3_TXD,
 163         GPIO92_SSP3_RXD,
 164
 165         /* SPI (SSP4) lines */
 166         GPIO93_SSP4_SCLK,
 167         GPIO95_SSP4_TXD,
 168         GPIO96_SSP4_RXD,
 169
 170         /* CAN nIRQ lines */
 171         GPIO74_GPIO | MFP_LPM_EDGE_RISE,
 172         GPIO75_GPIO | MFP_LPM_EDGE_RISE,
 173         GPIO76_GPIO | MFP_LPM_EDGE_RISE,
 174         GPIO77_GPIO | MFP_LPM_EDGE_RISE
 175 };
 176
 177 static void __init icontrol_can_init(void)
 178 {
 179         pxa3xx_mfp_config(ARRAY_AND_SIZE(mfp_can_cfg));
 180         platform_add_devices(ARRAY_AND_SIZE(icontrol_spi_devices));
 181         spi_register_board_info(ARRAY_AND_SIZE(mcp251x_board_info));
 182 }
 183
 184 static void __init icontrol_init(void)
 185 {
 186         mxm_8x10_barebones_init();
 187         mxm_8x10_usb_host_init();
 188         mxm_8x10_mmc_init();
 189
 190         icontrol_can_init();
 191 }
 192
 193 MACHINE_START(ICONTROL, "iControl/SafeTcam boards using Embedian MXM-8x10 CoM")
 194         .atag_offset    = 0x100,
 195         .map_io         = pxa3xx_map_io,
 196         .init_irq       = pxa3xx_init_irq,
 197         .handle_irq     = pxa3xx_handle_irq,
 198         .timer          = &pxa_timer,
 199         .init_machine   = icontrol_init
 200 MACHINE_END