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bde435a9ca
This patch adds spi->mode support for the AMBA pl022 driver and allows spidev to correctly alter SPI modes. Unused fields used in the pl022 header file for the pl022_config_chip have been removed. The ab8500 client driver selects the data transfer size instead of the platform data. For platforms that use the amba pl022 driver, the unused fields in the controller data structure have been removed and the .mode field in the SPI board info structure is used instead. Signed-off-by: Kevin Wells <wellsk40@gmail.com> Tested-by: Linus Walleij <linus.walleij@stericsson.com> Acked-by: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
175 lines
4.4 KiB
C
175 lines
4.4 KiB
C
/*
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* Copyright (C) 2008-2009 ST-Ericsson
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*
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* Author: Srinidhi KASAGAR <srinidhi.kasagar@stericsson.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2, as
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* published by the Free Software Foundation.
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*
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/platform_device.h>
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#include <linux/io.h>
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#include <linux/gpio.h>
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#include <linux/amba/bus.h>
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#include <linux/amba/pl022.h>
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#include <linux/spi/spi.h>
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#include <linux/mfd/ab8500.h>
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#include <asm/mach-types.h>
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#include <asm/mach/arch.h>
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#include <plat/pincfg.h>
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#include <plat/i2c.h>
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#include <mach/hardware.h>
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#include <mach/setup.h>
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#include <mach/devices.h>
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#include "pins-db8500.h"
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static pin_cfg_t mop500_pins[] = {
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/* SSP0 */
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GPIO143_SSP0_CLK,
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GPIO144_SSP0_FRM,
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GPIO145_SSP0_RXD,
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GPIO146_SSP0_TXD,
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/* I2C */
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GPIO147_I2C0_SCL,
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GPIO148_I2C0_SDA,
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GPIO16_I2C1_SCL,
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GPIO17_I2C1_SDA,
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GPIO10_I2C2_SDA,
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GPIO11_I2C2_SCL,
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GPIO229_I2C3_SDA,
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GPIO230_I2C3_SCL,
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};
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static void ab4500_spi_cs_control(u32 command)
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{
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/* set the FRM signal, which is CS - TODO */
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}
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struct pl022_config_chip ab4500_chip_info = {
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.com_mode = INTERRUPT_TRANSFER,
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.iface = SSP_INTERFACE_MOTOROLA_SPI,
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/* we can act as master only */
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.hierarchy = SSP_MASTER,
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.slave_tx_disable = 0,
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.rx_lev_trig = SSP_RX_1_OR_MORE_ELEM,
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.tx_lev_trig = SSP_TX_1_OR_MORE_EMPTY_LOC,
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.cs_control = ab4500_spi_cs_control,
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};
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static struct ab8500_platform_data ab8500_platdata = {
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.irq_base = MOP500_AB8500_IRQ_BASE,
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};
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static struct spi_board_info u8500_spi_devices[] = {
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{
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.modalias = "ab8500",
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.controller_data = &ab4500_chip_info,
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.platform_data = &ab8500_platdata,
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.max_speed_hz = 12000000,
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.bus_num = 0,
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.chip_select = 0,
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.mode = SPI_MODE_3,
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.irq = IRQ_DB8500_AB8500,
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},
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};
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static struct pl022_ssp_controller ssp0_platform_data = {
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.bus_id = 0,
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/* pl022 not yet supports dma */
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.enable_dma = 0,
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/* on this platform, gpio 31,142,144,214 &
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* 224 are connected as chip selects
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*/
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.num_chipselect = 5,
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};
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#define U8500_I2C_CONTROLLER(id, _slsu, _tft, _rft, clk, _sm) \
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static struct nmk_i2c_controller u8500_i2c##id##_data = { \
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/* \
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* slave data setup time, which is \
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* 250 ns,100ns,10ns which is 14,6,2 \
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* respectively for a 48 Mhz \
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* i2c clock \
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*/ \
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.slsu = _slsu, \
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/* Tx FIFO threshold */ \
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.tft = _tft, \
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/* Rx FIFO threshold */ \
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.rft = _rft, \
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/* std. mode operation */ \
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.clk_freq = clk, \
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.sm = _sm, \
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}
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/*
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* The board uses 4 i2c controllers, initialize all of
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* them with slave data setup time of 250 ns,
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* Tx & Rx FIFO threshold values as 1 and standard
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* mode of operation
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*/
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U8500_I2C_CONTROLLER(0, 0xe, 1, 1, 100000, I2C_FREQ_MODE_STANDARD);
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U8500_I2C_CONTROLLER(1, 0xe, 1, 1, 100000, I2C_FREQ_MODE_STANDARD);
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U8500_I2C_CONTROLLER(2, 0xe, 1, 1, 100000, I2C_FREQ_MODE_STANDARD);
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U8500_I2C_CONTROLLER(3, 0xe, 1, 1, 100000, I2C_FREQ_MODE_STANDARD);
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static struct amba_device *amba_devs[] __initdata = {
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&ux500_uart0_device,
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&ux500_uart1_device,
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&ux500_uart2_device,
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&u8500_ssp0_device,
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};
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/* add any platform devices here - TODO */
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static struct platform_device *platform_devs[] __initdata = {
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&u8500_i2c0_device,
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&ux500_i2c1_device,
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&ux500_i2c2_device,
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&ux500_i2c3_device,
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};
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static void __init u8500_init_machine(void)
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{
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int i;
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u8500_init_devices();
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nmk_config_pins(mop500_pins, ARRAY_SIZE(mop500_pins));
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u8500_i2c0_device.dev.platform_data = &u8500_i2c0_data;
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ux500_i2c1_device.dev.platform_data = &u8500_i2c1_data;
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ux500_i2c2_device.dev.platform_data = &u8500_i2c2_data;
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ux500_i2c3_device.dev.platform_data = &u8500_i2c3_data;
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u8500_ssp0_device.dev.platform_data = &ssp0_platform_data;
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/* Register the active AMBA devices on this board */
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for (i = 0; i < ARRAY_SIZE(amba_devs); i++)
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amba_device_register(amba_devs[i], &iomem_resource);
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platform_add_devices(platform_devs, ARRAY_SIZE(platform_devs));
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spi_register_board_info(u8500_spi_devices,
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ARRAY_SIZE(u8500_spi_devices));
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}
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MACHINE_START(U8500, "ST-Ericsson MOP500 platform")
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/* Maintainer: Srinidhi Kasagar <srinidhi.kasagar@stericsson.com> */
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.phys_io = U8500_UART2_BASE,
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.io_pg_offst = (IO_ADDRESS(U8500_UART2_BASE) >> 18) & 0xfffc,
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.boot_params = 0x100,
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.map_io = u8500_map_io,
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.init_irq = ux500_init_irq,
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/* we re-use nomadik timer here */
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.timer = &ux500_timer,
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.init_machine = u8500_init_machine,
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MACHINE_END
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