90c62bf08f
Add low-level initialization for hsmmc controller. Merged into this patch patch are various improvments and board support by Grazvydas Ignotas and David Brownell. Also change wire4 to be wires, as some newer controllers support 8 data lines. Cc: Pierre Ossman <drzeus-mmc@drzeus.cx> Signed-off-by: Grazvydas Ignotas <notasas@gmail.com> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Tony Lindgren <tony@atomide.com>
271 lines
6.7 KiB
C
271 lines
6.7 KiB
C
/*
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* linux/arch/arm/mach-omap2/board-2430sdp.c
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*
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* Copyright (C) 2006 Texas Instruments
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*
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* Modified from mach-omap2/board-generic.c
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*
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* Initial Code : Based on a patch from Komal Shah and Richard Woodruff
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* Updated the Code for 2430 SDP : Syed Mohammed Khasim
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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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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/platform_device.h>
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#include <linux/mtd/mtd.h>
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#include <linux/mtd/partitions.h>
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#include <linux/delay.h>
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#include <linux/i2c/twl4030.h>
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#include <linux/err.h>
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#include <linux/clk.h>
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#include <linux/io.h>
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#include <mach/hardware.h>
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#include <asm/mach-types.h>
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#include <asm/mach/arch.h>
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#include <asm/mach/map.h>
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#include <asm/mach/flash.h>
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#include <mach/gpio.h>
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#include <mach/mux.h>
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#include <mach/board.h>
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#include <mach/common.h>
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#include <mach/gpmc.h>
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#include "mmc-twl4030.h"
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#define SDP2430_FLASH_CS 0
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#define SDP2430_SMC91X_CS 5
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static struct mtd_partition sdp2430_partitions[] = {
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/* bootloader (U-Boot, etc) in first sector */
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{
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.name = "bootloader",
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.offset = 0,
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.size = SZ_256K,
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.mask_flags = MTD_WRITEABLE, /* force read-only */
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},
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/* bootloader params in the next sector */
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{
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.name = "params",
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.offset = MTDPART_OFS_APPEND,
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.size = SZ_128K,
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.mask_flags = 0,
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},
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/* kernel */
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{
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.name = "kernel",
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.offset = MTDPART_OFS_APPEND,
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.size = SZ_2M,
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.mask_flags = 0
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},
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/* file system */
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{
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.name = "filesystem",
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.offset = MTDPART_OFS_APPEND,
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.size = MTDPART_SIZ_FULL,
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.mask_flags = 0
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}
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};
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static struct flash_platform_data sdp2430_flash_data = {
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.map_name = "cfi_probe",
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.width = 2,
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.parts = sdp2430_partitions,
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.nr_parts = ARRAY_SIZE(sdp2430_partitions),
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};
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static struct resource sdp2430_flash_resource = {
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.start = SDP2430_CS0_BASE,
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.end = SDP2430_CS0_BASE + SZ_64M - 1,
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.flags = IORESOURCE_MEM,
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};
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static struct platform_device sdp2430_flash_device = {
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.name = "omapflash",
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.id = 0,
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.dev = {
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.platform_data = &sdp2430_flash_data,
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},
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.num_resources = 1,
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.resource = &sdp2430_flash_resource,
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};
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static struct resource sdp2430_smc91x_resources[] = {
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[0] = {
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.start = SDP2430_CS0_BASE,
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.end = SDP2430_CS0_BASE + SZ_64M - 1,
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.flags = IORESOURCE_MEM,
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},
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[1] = {
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.start = OMAP_GPIO_IRQ(OMAP24XX_ETHR_GPIO_IRQ),
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.end = OMAP_GPIO_IRQ(OMAP24XX_ETHR_GPIO_IRQ),
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.flags = IORESOURCE_IRQ | IORESOURCE_IRQ_LOWLEVEL,
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},
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};
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static struct platform_device sdp2430_smc91x_device = {
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.name = "smc91x",
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.id = -1,
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.num_resources = ARRAY_SIZE(sdp2430_smc91x_resources),
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.resource = sdp2430_smc91x_resources,
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};
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static struct platform_device *sdp2430_devices[] __initdata = {
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&sdp2430_smc91x_device,
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&sdp2430_flash_device,
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};
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static inline void __init sdp2430_init_smc91x(void)
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{
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int eth_cs;
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unsigned long cs_mem_base;
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unsigned int rate;
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struct clk *gpmc_fck;
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eth_cs = SDP2430_SMC91X_CS;
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gpmc_fck = clk_get(NULL, "gpmc_fck"); /* Always on ENABLE_ON_INIT */
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if (IS_ERR(gpmc_fck)) {
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WARN_ON(1);
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return;
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}
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clk_enable(gpmc_fck);
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rate = clk_get_rate(gpmc_fck);
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/* Make sure CS1 timings are correct, for 2430 always muxed */
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gpmc_cs_write_reg(eth_cs, GPMC_CS_CONFIG1, 0x00011200);
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if (rate >= 160000000) {
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gpmc_cs_write_reg(eth_cs, GPMC_CS_CONFIG2, 0x001f1f01);
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gpmc_cs_write_reg(eth_cs, GPMC_CS_CONFIG3, 0x00080803);
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gpmc_cs_write_reg(eth_cs, GPMC_CS_CONFIG4, 0x1c0b1c0a);
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gpmc_cs_write_reg(eth_cs, GPMC_CS_CONFIG5, 0x041f1F1F);
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gpmc_cs_write_reg(eth_cs, GPMC_CS_CONFIG6, 0x000004C4);
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} else if (rate >= 130000000) {
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gpmc_cs_write_reg(eth_cs, GPMC_CS_CONFIG2, 0x001f1f00);
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gpmc_cs_write_reg(eth_cs, GPMC_CS_CONFIG3, 0x00080802);
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gpmc_cs_write_reg(eth_cs, GPMC_CS_CONFIG4, 0x1C091C09);
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gpmc_cs_write_reg(eth_cs, GPMC_CS_CONFIG5, 0x041f1F1F);
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gpmc_cs_write_reg(eth_cs, GPMC_CS_CONFIG6, 0x000004C4);
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} else { /* rate = 100000000 */
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gpmc_cs_write_reg(eth_cs, GPMC_CS_CONFIG2, 0x001f1f00);
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gpmc_cs_write_reg(eth_cs, GPMC_CS_CONFIG3, 0x00080802);
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gpmc_cs_write_reg(eth_cs, GPMC_CS_CONFIG4, 0x1C091C09);
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gpmc_cs_write_reg(eth_cs, GPMC_CS_CONFIG5, 0x031A1F1F);
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gpmc_cs_write_reg(eth_cs, GPMC_CS_CONFIG6, 0x000003C2);
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}
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if (gpmc_cs_request(eth_cs, SZ_16M, &cs_mem_base) < 0) {
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printk(KERN_ERR "Failed to request GPMC mem for smc91x\n");
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goto out;
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}
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sdp2430_smc91x_resources[0].start = cs_mem_base + 0x300;
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sdp2430_smc91x_resources[0].end = cs_mem_base + 0x30f;
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udelay(100);
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if (gpio_request(OMAP24XX_ETHR_GPIO_IRQ, "SMC91x irq") < 0) {
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printk(KERN_ERR "Failed to request GPIO%d for smc91x IRQ\n",
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OMAP24XX_ETHR_GPIO_IRQ);
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gpmc_cs_free(eth_cs);
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goto out;
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}
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gpio_direction_input(OMAP24XX_ETHR_GPIO_IRQ);
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out:
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clk_disable(gpmc_fck);
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clk_put(gpmc_fck);
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}
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static void __init omap_2430sdp_init_irq(void)
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{
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omap2_init_common_hw();
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omap_init_irq();
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omap_gpio_init();
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sdp2430_init_smc91x();
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}
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static struct omap_uart_config sdp2430_uart_config __initdata = {
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.enabled_uarts = ((1 << 0) | (1 << 1) | (1 << 2)),
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};
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static struct omap_board_config_kernel sdp2430_config[] = {
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{OMAP_TAG_UART, &sdp2430_uart_config},
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};
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static struct twl4030_gpio_platform_data sdp2430_gpio_data = {
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.gpio_base = OMAP_MAX_GPIO_LINES,
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.irq_base = TWL4030_GPIO_IRQ_BASE,
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.irq_end = TWL4030_GPIO_IRQ_END,
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};
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static struct twl4030_platform_data sdp2430_twldata = {
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.irq_base = TWL4030_IRQ_BASE,
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.irq_end = TWL4030_IRQ_END,
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/* platform_data for children goes here */
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.gpio = &sdp2430_gpio_data,
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};
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static struct i2c_board_info __initdata sdp2430_i2c_boardinfo[] = {
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{
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I2C_BOARD_INFO("twl4030", 0x48),
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.flags = I2C_CLIENT_WAKE,
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.irq = INT_24XX_SYS_NIRQ,
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.platform_data = &sdp2430_twldata,
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},
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};
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static int __init omap2430_i2c_init(void)
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{
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omap_register_i2c_bus(1, 400, NULL, 0);
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omap_register_i2c_bus(2, 2600, sdp2430_i2c_boardinfo,
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ARRAY_SIZE(sdp2430_i2c_boardinfo));
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return 0;
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}
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static struct twl4030_hsmmc_info mmc[] __initdata = {
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{
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.mmc = 1,
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.wires = 4,
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.gpio_cd = -EINVAL,
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.gpio_wp = -EINVAL,
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.ext_clock = 1,
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},
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{} /* Terminator */
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};
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static void __init omap_2430sdp_init(void)
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{
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omap2430_i2c_init();
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platform_add_devices(sdp2430_devices, ARRAY_SIZE(sdp2430_devices));
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omap_board_config = sdp2430_config;
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omap_board_config_size = ARRAY_SIZE(sdp2430_config);
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omap_serial_init();
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twl4030_mmc_init(mmc);
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}
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static void __init omap_2430sdp_map_io(void)
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{
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omap2_set_globals_243x();
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omap2_map_common_io();
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}
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MACHINE_START(OMAP_2430SDP, "OMAP2430 sdp2430 board")
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/* Maintainer: Syed Khasim - Texas Instruments Inc */
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.phys_io = 0x48000000,
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.io_pg_offst = ((0xd8000000) >> 18) & 0xfffc,
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.boot_params = 0x80000100,
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.map_io = omap_2430sdp_map_io,
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.init_irq = omap_2430sdp_init_irq,
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.init_machine = omap_2430sdp_init,
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.timer = &omap_timer,
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MACHINE_END
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