aa44ef4d43
Adds core support for the ST-Ericsson U8500 platform. It supports memory mappings, binds to the existing modules like GIC, SCU, TWD and local timers and sets up the infrastructure for the secondary core. Reviewed-by: Alessandro Rubini <rubini@unipv.it> Reviewed-by: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: srinidhi kasagar <srinidhi.kasagar@stericsson.com> Acked-by: Andrea Gallo <andrea.gallo@stericsson.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
158 lines
3.8 KiB
C
158 lines
3.8 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/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 <asm/localtimer.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/mtu.h>
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#include <mach/hardware.h>
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#include <mach/setup.h>
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#define __MEM_4K_RESOURCE(x) \
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.res = {.start = (x), .end = (x) + SZ_4K - 1, .flags = IORESOURCE_MEM}
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/* These are active devices on this board */
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static struct amba_device uart0_device = {
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.dev = { .init_name = "uart0" },
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__MEM_4K_RESOURCE(U8500_UART0_BASE),
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.irq = {IRQ_UART0, NO_IRQ},
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};
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static struct amba_device uart1_device = {
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.dev = { .init_name = "uart1" },
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__MEM_4K_RESOURCE(U8500_UART1_BASE),
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.irq = {IRQ_UART1, NO_IRQ},
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};
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static struct amba_device uart2_device = {
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.dev = { .init_name = "uart2" },
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__MEM_4K_RESOURCE(U8500_UART2_BASE),
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.irq = {IRQ_UART2, NO_IRQ},
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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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.lbm = LOOPBACK_DISABLED,
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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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.endian_rx = SSP_RX_MSB,
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.endian_tx = SSP_TX_MSB,
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.data_size = SSP_DATA_BITS_24,
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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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.clk_phase = SSP_CLK_SECOND_EDGE,
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.clk_pol = SSP_CLK_POL_IDLE_HIGH,
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.cs_control = ab4500_spi_cs_control,
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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 = "ab4500",
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.controller_data = &ab4500_chip_info,
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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_0,
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.irq = IRQ_AB4500,
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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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static struct amba_device pl022_device = {
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.dev = {
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.coherent_dma_mask = ~0,
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.init_name = "pl022",
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.platform_data = &ssp0_platform_data,
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},
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.res = {
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.start = U8500_SSP0_BASE,
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.end = U8500_SSP0_BASE + SZ_4K - 1,
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.flags = IORESOURCE_MEM,
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},
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.irq = {IRQ_SSP0, NO_IRQ },
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/* ST-Ericsson modified id */
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.periphid = SSP_PER_ID,
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};
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static struct amba_device *amba_devs[] __initdata = {
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&uart0_device,
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&uart1_device,
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&uart2_device,
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&pl022_device,
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};
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static void __init u8500_timer_init(void)
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{
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#ifdef CONFIG_LOCAL_TIMERS
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/* Setup the local timer base */
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twd_base = __io_address(U8500_TWD_BASE);
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#endif
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/* Setup the MTU base */
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mtu_base = __io_address(U8500_MTU0_BASE);
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nmdk_timer_init();
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}
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static struct sys_timer u8500_timer = {
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.init = u8500_timer_init,
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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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/* 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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spi_register_board_info(u8500_spi_devices,
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ARRAY_SIZE(u8500_spi_devices));
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u8500_init_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 = u8500_init_irq,
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/* we re-use nomadik timer here */
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.timer = &u8500_timer,
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.init_machine = u8500_init_machine,
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MACHINE_END
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