icontrol.c

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/*
 * linux/arch/arm/mach-pxa/icontrol.c
 *
 * Support for the iControl and SafeTcam platforms from TMT Services
 * using the Embedian MXM-8x10 Computer on Module
 *
 * Copyright (C) 2009 TMT Services & Supplies (Pty) Ltd.
 *
 * 2010-01-21 Hennie van der Merve <[email protected]>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/irq.h>
#include <linux/platform_device.h>
#include <linux/gpio.h>

#include <asm/mach-types.h>
#include <asm/mach/arch.h>

#include <mach/pxa320.h>
#include <mach/mxm8x10.h>

#include <linux/spi/spi.h>
#include <linux/spi/pxa2xx_spi.h>
#include <linux/can/platform/mcp251x.h>

#include "generic.h"

#define ICONTROL_MCP251x_nCS1   (15)
#define ICONTROL_MCP251x_nCS2   (16)
#define ICONTROL_MCP251x_nCS3   (17)
#define ICONTROL_MCP251x_nCS4   (24)

#define ICONTROL_MCP251x_nIRQ1  (74)
#define ICONTROL_MCP251x_nIRQ2  (75)
#define ICONTROL_MCP251x_nIRQ3  (76)
#define ICONTROL_MCP251x_nIRQ4  (77)

static struct pxa2xx_spi_chip mcp251x_chip_info1 = {
    .tx_threshold   = 8,
    .rx_threshold   = 128,
    .dma_burst_size = 8,
    .timeout        = 235,
    .gpio_cs        = ICONTROL_MCP251x_nCS1
};

static struct pxa2xx_spi_chip mcp251x_chip_info2 = {
    .tx_threshold   = 8,
    .rx_threshold   = 128,
    .dma_burst_size = 8,
    .timeout        = 235,
    .gpio_cs        = ICONTROL_MCP251x_nCS2
};

static struct pxa2xx_spi_chip mcp251x_chip_info3 = {
    .tx_threshold   = 8,
    .rx_threshold   = 128,
    .dma_burst_size = 8,
    .timeout        = 235,
    .gpio_cs        = ICONTROL_MCP251x_nCS3
};

static struct pxa2xx_spi_chip mcp251x_chip_info4 = {
    .tx_threshold   = 8,
    .rx_threshold   = 128,
    .dma_burst_size = 8,
    .timeout        = 235,
    .gpio_cs        = ICONTROL_MCP251x_nCS4
};

static struct mcp251x_platform_data mcp251x_info = {
    .oscillator_frequency = 16E6,
    .board_specific_setup = NULL,
    .power_enable         = NULL,
    .transceiver_enable   = NULL
};

static struct spi_board_info mcp251x_board_info[] = {
    {
        .modalias        = "mcp2515",
        .max_speed_hz    = 6500000,
        .bus_num         = 3,
        .chip_select     = 0,
        .platform_data   = &mcp251x_info,
        .controller_data = &mcp251x_chip_info1,
        .irq             = PXA_GPIO_TO_IRQ(ICONTROL_MCP251x_nIRQ1)
    },
    {
        .modalias        = "mcp2515",
        .max_speed_hz    = 6500000,
        .bus_num         = 3,
        .chip_select     = 1,
        .platform_data   = &mcp251x_info,
        .controller_data = &mcp251x_chip_info2,
        .irq             = PXA_GPIO_TO_IRQ(ICONTROL_MCP251x_nIRQ2)
    },
    {
        .modalias        = "mcp2515",
        .max_speed_hz    = 6500000,
        .bus_num         = 4,
        .chip_select     = 0,
        .platform_data   = &mcp251x_info,
        .controller_data = &mcp251x_chip_info3,
        .irq             = PXA_GPIO_TO_IRQ(ICONTROL_MCP251x_nIRQ3)
    },
    {
        .modalias        = "mcp2515",
        .max_speed_hz    = 6500000,
        .bus_num         = 4,
        .chip_select     = 1,
        .platform_data   = &mcp251x_info,
        .controller_data = &mcp251x_chip_info4,
        .irq             = PXA_GPIO_TO_IRQ(ICONTROL_MCP251x_nIRQ4)
    }
};

static struct pxa2xx_spi_master pxa_ssp3_spi_master_info = {
    .clock_enable   = CKEN_SSP3,
    .num_chipselect = 2,
    .enable_dma     = 1
};

static struct pxa2xx_spi_master pxa_ssp4_spi_master_info = {
    .clock_enable   = CKEN_SSP4,
    .num_chipselect = 2,
    .enable_dma     = 1
};

struct platform_device pxa_spi_ssp3 = {
    .name          = "pxa2xx-spi",
    .id            = 3,
    .dev           = {
        .platform_data = &pxa_ssp3_spi_master_info,
    }
};

struct platform_device pxa_spi_ssp4 = {
    .name          = "pxa2xx-spi",
    .id            = 4,
    .dev           = {
        .platform_data = &pxa_ssp4_spi_master_info,
    }
};

static struct platform_device *icontrol_spi_devices[] __initdata = {
    &pxa_spi_ssp3,
    &pxa_spi_ssp4,
};

static mfp_cfg_t mfp_can_cfg[] __initdata = {
    /* CAN CS lines */
    GPIO15_GPIO,
    GPIO16_GPIO,
    GPIO17_GPIO,
    GPIO24_GPIO,

    /* SPI (SSP3) lines */
    GPIO89_SSP3_SCLK,
    GPIO91_SSP3_TXD,
    GPIO92_SSP3_RXD,

    /* SPI (SSP4) lines */
    GPIO93_SSP4_SCLK,
    GPIO95_SSP4_TXD,
    GPIO96_SSP4_RXD,

    /* CAN nIRQ lines */
    GPIO74_GPIO | MFP_LPM_EDGE_RISE,
    GPIO75_GPIO | MFP_LPM_EDGE_RISE,
    GPIO76_GPIO | MFP_LPM_EDGE_RISE,
    GPIO77_GPIO | MFP_LPM_EDGE_RISE
};

static void __init icontrol_can_init(void)
{
    pxa3xx_mfp_config(ARRAY_AND_SIZE(mfp_can_cfg));
    platform_add_devices(ARRAY_AND_SIZE(icontrol_spi_devices));
    spi_register_board_info(ARRAY_AND_SIZE(mcp251x_board_info));
}

static void __init icontrol_init(void)
{
    mxm_8x10_barebones_init();
    mxm_8x10_usb_host_init();
    mxm_8x10_mmc_init();

    icontrol_can_init();
}

MACHINE_START(ICONTROL, "iControl/SafeTcam boards using Embedian MXM-8x10 CoM")
    .atag_offset    = 0x100,
    .map_io     = pxa3xx_map_io,
    .nr_irqs    = PXA_NR_IRQS,
    .init_irq   = pxa3xx_init_irq,
    .handle_irq = pxa3xx_handle_irq,
    .timer      = &pxa_timer,
    .init_machine   = icontrol_init,
    .restart    = pxa_restart,
MACHINE_END