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/*
* Copyright (C) 2008-2009 ST-Ericsson
*
* Author: Srinidhi KASAGAR <srinidhi.kasagar@stericsson.com>
*
* 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/kernel.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/amba/bus.h>
#include <linux/amba/pl022.h>
#include <linux/spi/spi.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#include <plat/i2c.h>
#include <mach/hardware.h>
#include <mach/setup.h>
#include <mach/devices.h>
static void ab4500_spi_cs_control(u32 command)
{
/* set the FRM signal, which is CS - TODO */
}
struct pl022_config_chip ab4500_chip_info = {
.lbm = LOOPBACK_DISABLED,
.com_mode = INTERRUPT_TRANSFER,
.iface = SSP_INTERFACE_MOTOROLA_SPI,
/* we can act as master only */
.hierarchy = SSP_MASTER,
.slave_tx_disable = 0,
.endian_rx = SSP_RX_MSB,
.endian_tx = SSP_TX_MSB,
.data_size = SSP_DATA_BITS_24,
.rx_lev_trig = SSP_RX_1_OR_MORE_ELEM,
.tx_lev_trig = SSP_TX_1_OR_MORE_EMPTY_LOC,
.clk_phase = SSP_CLK_SECOND_EDGE,
.clk_pol = SSP_CLK_POL_IDLE_HIGH,
.cs_control = ab4500_spi_cs_control,
};
static struct spi_board_info u8500_spi_devices[] = {
{
.modalias = "ab4500",
.controller_data = &ab4500_chip_info,
.max_speed_hz = 12000000,
.bus_num = 0,
.chip_select = 0,
.mode = SPI_MODE_0,
.irq = IRQ_AB4500,
},
};
static struct pl022_ssp_controller ssp0_platform_data = {
.bus_id = 0,
/* pl022 not yet supports dma */
.enable_dma = 0,
/* on this platform, gpio 31,142,144,214 &
* 224 are connected as chip selects
*/
.num_chipselect = 5,
};
#define U8500_I2C_RESOURCES(id, size) \
static struct resource u8500_i2c_resources_##id[] = { \
[0] = { \
.start = U8500_I2C##id##_BASE, \
.end = U8500_I2C##id##_BASE + size - 1, \
.flags = IORESOURCE_MEM, \
}, \
[1] = { \
.start = IRQ_I2C##id, \
.end = IRQ_I2C##id, \
.flags = IORESOURCE_IRQ \
} \
}
U8500_I2C_RESOURCES(0, SZ_4K);
U8500_I2C_RESOURCES(1, SZ_4K);
U8500_I2C_RESOURCES(2, SZ_4K);
U8500_I2C_RESOURCES(3, SZ_4K);
#define U8500_I2C_CONTROLLER(id, _slsu, _tft, _rft, clk, _sm) \
static struct nmk_i2c_controller u8500_i2c_##id = { \
/* \
* slave data setup time, which is \
* 250 ns,100ns,10ns which is 14,6,2 \
* respectively for a 48 Mhz \
* i2c clock \
*/ \
.slsu = _slsu, \
/* Tx FIFO threshold */ \
.tft = _tft, \
/* Rx FIFO threshold */ \
.rft = _rft, \
/* std. mode operation */ \
.clk_freq = clk, \
.sm = _sm, \
}
/*
* The board uses 4 i2c controllers, initialize all of
* them with slave data setup time of 250 ns,
* Tx & Rx FIFO threshold values as 1 and standard
* mode of operation
*/
U8500_I2C_CONTROLLER(0, 0xe, 1, 1, 100000, I2C_FREQ_MODE_STANDARD);
U8500_I2C_CONTROLLER(1, 0xe, 1, 1, 100000, I2C_FREQ_MODE_STANDARD);
U8500_I2C_CONTROLLER(2, 0xe, 1, 1, 100000, I2C_FREQ_MODE_STANDARD);
U8500_I2C_CONTROLLER(3, 0xe, 1, 1, 100000, I2C_FREQ_MODE_STANDARD);
#define U8500_I2C_PDEVICE(cid) \
static struct platform_device i2c_controller##cid = { \
.name = "nmk-i2c", \
.id = cid, \
.num_resources = 2, \
.resource = u8500_i2c_resources_##cid, \
.dev = { \
.platform_data = &u8500_i2c_##cid \
} \
}
U8500_I2C_PDEVICE(0);
U8500_I2C_PDEVICE(1);
U8500_I2C_PDEVICE(2);
U8500_I2C_PDEVICE(3);
static struct amba_device *amba_devs[] __initdata = {
&ux500_uart0_device,
&ux500_uart1_device,
&ux500_uart2_device,
&u8500_ssp0_device,
};
/* add any platform devices here - TODO */
static struct platform_device *platform_devs[] __initdata = {
&i2c_controller0,
&i2c_controller1,
&i2c_controller2,
&i2c_controller3,
};
static void __init u8500_init_machine(void)
{
int i;
u8500_ssp0_device.dev.platform_data = &ssp0_platform_data;
/* Register the active AMBA devices on this board */
for (i = 0; i < ARRAY_SIZE(amba_devs); i++)
amba_device_register(amba_devs[i], &iomem_resource);
platform_add_devices(platform_devs, ARRAY_SIZE(platform_devs));
spi_register_board_info(u8500_spi_devices,
ARRAY_SIZE(u8500_spi_devices));
u8500_init_devices();
}
MACHINE_START(U8500, "ST-Ericsson MOP500 platform")
/* Maintainer: Srinidhi Kasagar <srinidhi.kasagar@stericsson.com> */
.phys_io = U8500_UART2_BASE,
.io_pg_offst = (IO_ADDRESS(U8500_UART2_BASE) >> 18) & 0xfffc,
.boot_params = 0x100,
.map_io = u8500_map_io,
.init_irq = ux500_init_irq,
/* we re-use nomadik timer here */
.timer = &u8500_timer,
.init_machine = u8500_init_machine,
MACHINE_END
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