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 <hvdmerwe@tmtservies.co.za>
*
* 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,
.init_irq = pxa3xx_init_irq,
.handle_irq = pxa3xx_handle_irq,
.timer = &pxa_timer,
.init_machine = icontrol_init,
.restart = pxa_restart,
MACHINE_END