352 lines
8.6 KiB
C
352 lines
8.6 KiB
C
/*
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* linux/arch/arm/mach-omap1/devices.c
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*
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* OMAP1 platform device setup/initialization
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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 as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#include <linux/config.h>
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/device.h>
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#include <asm/hardware.h>
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#include <asm/io.h>
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#include <asm/mach-types.h>
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#include <asm/mach/map.h>
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#include <asm/arch/tc.h>
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#include <asm/arch/board.h>
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#include <asm/arch/mux.h>
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#include <asm/arch/gpio.h>
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static void omap_nop_release(struct device *dev)
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{
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/* Nothing */
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}
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/*-------------------------------------------------------------------------*/
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#if defined(CONFIG_I2C_OMAP) || defined(CONFIG_I2C_OMAP_MODULE)
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#define OMAP_I2C_BASE 0xfffb3800
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static struct resource i2c_resources[] = {
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{
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.start = OMAP_I2C_BASE,
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.end = OMAP_I2C_BASE + 0x3f,
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.flags = IORESOURCE_MEM,
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},
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{
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.start = INT_I2C,
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.flags = IORESOURCE_IRQ,
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},
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};
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/* DMA not used; works around erratum writing to non-empty i2c fifo */
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static struct platform_device omap_i2c_device = {
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.name = "i2c_omap",
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.id = -1,
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.dev = {
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.release = omap_nop_release,
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},
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.num_resources = ARRAY_SIZE(i2c_resources),
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.resource = i2c_resources,
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};
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static void omap_init_i2c(void)
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{
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/* FIXME define and use a boot tag, in case of boards that
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* either don't wire up I2C, or chips that mux it differently...
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* it can include clocking and address info, maybe more.
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*/
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omap_cfg_reg(I2C_SCL);
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omap_cfg_reg(I2C_SDA);
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(void) platform_device_register(&omap_i2c_device);
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}
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#else
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static inline void omap_init_i2c(void) {}
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#endif
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/*-------------------------------------------------------------------------*/
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#if defined(CONFIG_OMAP1610_IR) || defined(CONFIG_OMAP161O_IR_MODULE)
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static u64 irda_dmamask = 0xffffffff;
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static struct platform_device omap1610ir_device = {
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.name = "omap1610-ir",
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.id = -1,
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.dev = {
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.release = omap_nop_release,
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.dma_mask = &irda_dmamask,
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},
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};
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static void omap_init_irda(void)
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{
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/* FIXME define and use a boot tag, members something like:
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* u8 uart; // uart1, or uart3
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* ... but driver only handles uart3 for now
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* s16 fir_sel; // gpio for SIR vs FIR
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* ... may prefer a callback for SIR/MIR/FIR mode select;
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* while h2 uses a GPIO, H3 uses a gpio expander
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*/
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if (machine_is_omap_h2()
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|| machine_is_omap_h3())
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(void) platform_device_register(&omap1610ir_device);
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}
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#else
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static inline void omap_init_irda(void) {}
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#endif
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/*-------------------------------------------------------------------------*/
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#if defined(CONFIG_MMC_OMAP) || defined(CONFIG_MMC_OMAP_MODULE)
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#define OMAP_MMC1_BASE 0xfffb7800
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#define OMAP_MMC2_BASE 0xfffb7c00 /* omap16xx only */
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static struct omap_mmc_conf mmc1_conf;
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static u64 mmc1_dmamask = 0xffffffff;
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static struct resource mmc1_resources[] = {
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{
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.start = IO_ADDRESS(OMAP_MMC1_BASE),
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.end = IO_ADDRESS(OMAP_MMC1_BASE) + 0x7f,
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.flags = IORESOURCE_MEM,
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},
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{
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.start = INT_MMC,
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.flags = IORESOURCE_IRQ,
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},
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};
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static struct platform_device mmc_omap_device1 = {
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.name = "mmci-omap",
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.id = 1,
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.dev = {
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.release = omap_nop_release,
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.dma_mask = &mmc1_dmamask,
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.platform_data = &mmc1_conf,
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},
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.num_resources = ARRAY_SIZE(mmc1_resources),
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.resource = mmc1_resources,
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};
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#ifdef CONFIG_ARCH_OMAP16XX
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static struct omap_mmc_conf mmc2_conf;
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static u64 mmc2_dmamask = 0xffffffff;
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static struct resource mmc2_resources[] = {
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{
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.start = IO_ADDRESS(OMAP_MMC2_BASE),
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.end = IO_ADDRESS(OMAP_MMC2_BASE) + 0x7f,
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.flags = IORESOURCE_MEM,
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},
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{
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.start = INT_1610_MMC2,
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.flags = IORESOURCE_IRQ,
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},
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};
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static struct platform_device mmc_omap_device2 = {
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.name = "mmci-omap",
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.id = 2,
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.dev = {
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.release = omap_nop_release,
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.dma_mask = &mmc2_dmamask,
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.platform_data = &mmc2_conf,
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},
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.num_resources = ARRAY_SIZE(mmc2_resources),
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.resource = mmc2_resources,
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};
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#endif
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static void __init omap_init_mmc(void)
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{
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const struct omap_mmc_config *mmc_conf;
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const struct omap_mmc_conf *mmc;
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/* NOTE: assumes MMC was never (wrongly) enabled */
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mmc_conf = omap_get_config(OMAP_TAG_MMC, struct omap_mmc_config);
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if (!mmc_conf)
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return;
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/* block 1 is always available and has just one pinout option */
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mmc = &mmc_conf->mmc[0];
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if (mmc->enabled) {
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omap_cfg_reg(MMC_CMD);
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omap_cfg_reg(MMC_CLK);
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omap_cfg_reg(MMC_DAT0);
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if (cpu_is_omap1710()) {
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omap_cfg_reg(M15_1710_MMC_CLKI);
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omap_cfg_reg(P19_1710_MMC_CMDDIR);
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omap_cfg_reg(P20_1710_MMC_DATDIR0);
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}
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if (mmc->wire4) {
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omap_cfg_reg(MMC_DAT1);
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/* NOTE: DAT2 can be on W10 (here) or M15 */
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if (!mmc->nomux)
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omap_cfg_reg(MMC_DAT2);
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omap_cfg_reg(MMC_DAT3);
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}
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mmc1_conf = *mmc;
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(void) platform_device_register(&mmc_omap_device1);
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}
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#ifdef CONFIG_ARCH_OMAP16XX
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/* block 2 is on newer chips, and has many pinout options */
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mmc = &mmc_conf->mmc[1];
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if (mmc->enabled) {
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if (!mmc->nomux) {
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omap_cfg_reg(Y8_1610_MMC2_CMD);
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omap_cfg_reg(Y10_1610_MMC2_CLK);
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omap_cfg_reg(R18_1610_MMC2_CLKIN);
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omap_cfg_reg(W8_1610_MMC2_DAT0);
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if (mmc->wire4) {
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omap_cfg_reg(V8_1610_MMC2_DAT1);
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omap_cfg_reg(W15_1610_MMC2_DAT2);
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omap_cfg_reg(R10_1610_MMC2_DAT3);
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}
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/* These are needed for the level shifter */
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omap_cfg_reg(V9_1610_MMC2_CMDDIR);
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omap_cfg_reg(V5_1610_MMC2_DATDIR0);
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omap_cfg_reg(W19_1610_MMC2_DATDIR1);
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}
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/* Feedback clock must be set on OMAP-1710 MMC2 */
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if (cpu_is_omap1710())
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omap_writel(omap_readl(MOD_CONF_CTRL_1) | (1 << 24),
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MOD_CONF_CTRL_1);
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mmc2_conf = *mmc;
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(void) platform_device_register(&mmc_omap_device2);
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}
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#endif
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return;
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}
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#else
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static inline void omap_init_mmc(void) {}
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#endif
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#if defined(CONFIG_OMAP_RTC) || defined(CONFIG_OMAP_RTC)
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#define OMAP_RTC_BASE 0xfffb4800
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static struct resource rtc_resources[] = {
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{
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.start = OMAP_RTC_BASE,
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.end = OMAP_RTC_BASE + 0x5f,
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.flags = IORESOURCE_MEM,
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},
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{
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.start = INT_RTC_TIMER,
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.flags = IORESOURCE_IRQ,
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},
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{
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.start = INT_RTC_ALARM,
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.flags = IORESOURCE_IRQ,
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},
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};
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static struct platform_device omap_rtc_device = {
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.name = "omap_rtc",
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.id = -1,
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.dev = {
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.release = omap_nop_release,
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},
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.num_resources = ARRAY_SIZE(rtc_resources),
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.resource = rtc_resources,
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};
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static void omap_init_rtc(void)
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{
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(void) platform_device_register(&omap_rtc_device);
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}
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#else
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static inline void omap_init_rtc(void) {}
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#endif
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/*-------------------------------------------------------------------------*/
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#if defined(CONFIG_OMAP16XX_WATCHDOG) || defined(CONFIG_OMAP16XX_WATCHDOG_MODULE)
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#define OMAP_WDT_BASE 0xfffeb000
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static struct resource wdt_resources[] = {
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{
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.start = OMAP_WDT_BASE,
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.end = OMAP_WDT_BASE + 0x4f,
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.flags = IORESOURCE_MEM,
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},
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};
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static struct platform_device omap_wdt_device = {
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.name = "omap1610_wdt",
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.id = -1,
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.dev = {
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.release = omap_nop_release,
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},
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.num_resources = ARRAY_SIZE(wdt_resources),
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.resource = wdt_resources,
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};
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static void omap_init_wdt(void)
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{
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(void) platform_device_register(&omap_wdt_device);
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}
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#else
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static inline void omap_init_wdt(void) {}
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#endif
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/*-------------------------------------------------------------------------*/
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/*
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* This gets called after board-specific INIT_MACHINE, and initializes most
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* on-chip peripherals accessible on this board (except for few like USB):
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*
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* (a) Does any "standard config" pin muxing needed. Board-specific
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* code will have muxed GPIO pins and done "nonstandard" setup;
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* that code could live in the boot loader.
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* (b) Populating board-specific platform_data with the data drivers
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* rely on to handle wiring variations.
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* (c) Creating platform devices as meaningful on this board and
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* with this kernel configuration.
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*
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* Claiming GPIOs, and setting their direction and initial values, is the
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* responsibility of the device drivers. So is responding to probe().
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*
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* Board-specific knowlege like creating devices or pin setup is to be
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* kept out of drivers as much as possible. In particular, pin setup
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* may be handled by the boot loader, and drivers should expect it will
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* normally have been done by the time they're probed.
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*/
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static int __init omap_init_devices(void)
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{
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/* please keep these calls, and their implementations above,
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* in alphabetical order so they're easier to sort through.
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*/
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omap_init_i2c();
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omap_init_irda();
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omap_init_mmc();
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omap_init_rtc();
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omap_init_wdt();
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return 0;
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}
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arch_initcall(omap_init_devices);
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