[ARM] 2890/1: OMAP 1/4: Update omap1 specific files, take 2

Patch from Tony Lindgren

This patch syncs the mainline kernel with linux-omap tree.
The highlights of the patch are:
- Convert more drivers to register resources in board-*.c to take
  advantage of the driver model by David Brownell and Ladislav Michl
- Use set_irq_type() for GPIO interrupts instead of
  omap_set_gpio_edge_ctrl() by David Brownell
- Add minimal support for handling optional add-on boards, such as
  OSK Mistral board with LCD and keypad, by David Brownell
- Minimal support for loading functions to SRAM by Tony Lindgren
- Wake up from serial port by muxing RX lines temporarily into GPIO
  interrupts by Tony Lindgren
- 32KHz sched_clock by Tony Lindgren and Juha Yrjola

Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 351 insertions, 0 deletions

diff --git a/arch/arm/mach-omap1/devices.c b/arch/arm/mach-omap1/devices.c
new file mode 100644
index 000000000000..e8b3981444cd
--- /dev/null
+++ b/arch/arm/mach-omap1/devices.c
@@ -0,0 +1,351 @@
+/*
+ * linux/arch/arm/mach-omap1/devices.c
+ *
+ * OMAP1 platform device setup/initialization
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/device.h>
+
+#include <asm/hardware.h>
+#include <asm/io.h>
+#include <asm/mach-types.h>
+#include <asm/mach/map.h>
+
+#include <asm/arch/tc.h>
+#include <asm/arch/board.h>
+#include <asm/arch/mux.h>
+#include <asm/arch/gpio.h>
+
+
+static void omap_nop_release(struct device *dev)
+{
+        /* Nothing */
+}
+
+/*-------------------------------------------------------------------------*/
+
+#if     defined(CONFIG_I2C_OMAP) || defined(CONFIG_I2C_OMAP_MODULE)
+
+#define OMAP_I2C_BASE           0xfffb3800
+
+static struct resource i2c_resources[] = {
+        {
+                .start          = OMAP_I2C_BASE,
+                .end            = OMAP_I2C_BASE + 0x3f,
+                .flags          = IORESOURCE_MEM,
+        },
+        {
+                .start          = INT_I2C,
+                .flags          = IORESOURCE_IRQ,
+        },
+};
+
+/* DMA not used; works around erratum writing to non-empty i2c fifo */
+
+static struct platform_device omap_i2c_device = {
+        .name           = "i2c_omap",
+        .id             = -1,
+        .dev = {
+                .release        = omap_nop_release,
+        },
+        .num_resources  = ARRAY_SIZE(i2c_resources),
+        .resource       = i2c_resources,
+};
+
+static void omap_init_i2c(void)
+{
+        /* FIXME define and use a boot tag, in case of boards that
+         * either don't wire up I2C, or chips that mux it differently...
+         * it can include clocking and address info, maybe more.
+         */
+        omap_cfg_reg(I2C_SCL);
+        omap_cfg_reg(I2C_SDA);
+
+        (void) platform_device_register(&omap_i2c_device);
+}
+#else
+static inline void omap_init_i2c(void) {}
+#endif
+
+/*-------------------------------------------------------------------------*/
+
+#if     defined(CONFIG_OMAP1610_IR) || defined(CONFIG_OMAP161O_IR_MODULE)
+
+static u64 irda_dmamask = 0xffffffff;
+
+static struct platform_device omap1610ir_device = {
+        .name = "omap1610-ir",
+        .id = -1,
+        .dev = {
+                .release        = omap_nop_release,
+                .dma_mask       = &irda_dmamask,
+        },
+};
+
+static void omap_init_irda(void)
+{
+        /* FIXME define and use a boot tag, members something like:
+         *  u8          uart;           // uart1, or uart3
+         * ... but driver only handles uart3 for now
+         *  s16         fir_sel;        // gpio for SIR vs FIR
+         * ... may prefer a callback for SIR/MIR/FIR mode select;
+         * while h2 uses a GPIO, H3 uses a gpio expander
+         */
+        if (machine_is_omap_h2()
+                        || machine_is_omap_h3())
+                (void) platform_device_register(&omap1610ir_device);
+}
+#else
+static inline void omap_init_irda(void) {}
+#endif
+
+/*-------------------------------------------------------------------------*/
+
+#if     defined(CONFIG_MMC_OMAP) || defined(CONFIG_MMC_OMAP_MODULE)
+
+#define OMAP_MMC1_BASE          0xfffb7800
+#define OMAP_MMC2_BASE          0xfffb7c00      /* omap16xx only */
+
+static struct omap_mmc_conf mmc1_conf;
+
+static u64 mmc1_dmamask = 0xffffffff;
+
+static struct resource mmc1_resources[] = {
+        {
+                .start          = IO_ADDRESS(OMAP_MMC1_BASE),
+                .end            = IO_ADDRESS(OMAP_MMC1_BASE) + 0x7f,
+                .flags          = IORESOURCE_MEM,
+        },
+        {
+                .start          = INT_MMC,
+                .flags          = IORESOURCE_IRQ,
+        },
+};
+
+static struct platform_device mmc_omap_device1 = {
+        .name           = "mmci-omap",
+        .id             = 1,
+        .dev = {
+                .release        = omap_nop_release,
+                .dma_mask       = &mmc1_dmamask,
+                .platform_data  = &mmc1_conf,
+        },
+        .num_resources  = ARRAY_SIZE(mmc1_resources),
+        .resource       = mmc1_resources,
+};
+
+#ifdef  CONFIG_ARCH_OMAP16XX
+
+static struct omap_mmc_conf mmc2_conf;
+
+static u64 mmc2_dmamask = 0xffffffff;
+
+static struct resource mmc2_resources[] = {
+        {
+                .start          = IO_ADDRESS(OMAP_MMC2_BASE),
+                .end            = IO_ADDRESS(OMAP_MMC2_BASE) + 0x7f,
+                .flags          = IORESOURCE_MEM,
+        },
+        {
+                .start          = INT_1610_MMC2,
+                .flags          = IORESOURCE_IRQ,
+        },
+};
+
+static struct platform_device mmc_omap_device2 = {
+        .name           = "mmci-omap",
+        .id             = 2,
+        .dev = {
+                .release        = omap_nop_release,
+                .dma_mask       = &mmc2_dmamask,
+                .platform_data  = &mmc2_conf,
+        },
+        .num_resources  = ARRAY_SIZE(mmc2_resources),
+        .resource       = mmc2_resources,
+};
+#endif
+
+static void __init omap_init_mmc(void)
+{
+        const struct omap_mmc_config    *mmc_conf;
+        const struct omap_mmc_conf      *mmc;
+
+        /* NOTE:  assumes MMC was never (wrongly) enabled */
+        mmc_conf = omap_get_config(OMAP_TAG_MMC, struct omap_mmc_config);
+        if (!mmc_conf)
+                return;
+
+        /* block 1 is always available and has just one pinout option */
+        mmc = &mmc_conf->mmc[0];
+        if (mmc->enabled) {
+                omap_cfg_reg(MMC_CMD);
+                omap_cfg_reg(MMC_CLK);
+                omap_cfg_reg(MMC_DAT0);
+                if (cpu_is_omap1710()) {
+                      omap_cfg_reg(M15_1710_MMC_CLKI);
+                      omap_cfg_reg(P19_1710_MMC_CMDDIR);
+                      omap_cfg_reg(P20_1710_MMC_DATDIR0);
+                }
+                if (mmc->wire4) {
+                        omap_cfg_reg(MMC_DAT1);
+                        /* NOTE:  DAT2 can be on W10 (here) or M15 */
+                        if (!mmc->nomux)
+                                omap_cfg_reg(MMC_DAT2);
+                        omap_cfg_reg(MMC_DAT3);
+                }
+                mmc1_conf = *mmc;
+                (void) platform_device_register(&mmc_omap_device1);
+        }
+
+#ifdef  CONFIG_ARCH_OMAP16XX
+        /* block 2 is on newer chips, and has many pinout options */
+        mmc = &mmc_conf->mmc[1];
+        if (mmc->enabled) {
+                if (!mmc->nomux) {
+                        omap_cfg_reg(Y8_1610_MMC2_CMD);
+                        omap_cfg_reg(Y10_1610_MMC2_CLK);
+                        omap_cfg_reg(R18_1610_MMC2_CLKIN);
+                        omap_cfg_reg(W8_1610_MMC2_DAT0);
+                        if (mmc->wire4) {
+                                omap_cfg_reg(V8_1610_MMC2_DAT1);
+                                omap_cfg_reg(W15_1610_MMC2_DAT2);
+                                omap_cfg_reg(R10_1610_MMC2_DAT3);
+                        }
+
+                        /* These are needed for the level shifter */
+                        omap_cfg_reg(V9_1610_MMC2_CMDDIR);
+                        omap_cfg_reg(V5_1610_MMC2_DATDIR0);
+                        omap_cfg_reg(W19_1610_MMC2_DATDIR1);
+                }
+
+                /* Feedback clock must be set on OMAP-1710 MMC2 */
+                if (cpu_is_omap1710())
+                        omap_writel(omap_readl(MOD_CONF_CTRL_1) | (1 << 24),
+                                     MOD_CONF_CTRL_1);
+                mmc2_conf = *mmc;
+                (void) platform_device_register(&mmc_omap_device2);
+        }
+#endif
+        return;
+}
+#else
+static inline void omap_init_mmc(void) {}
+#endif
+
+#if     defined(CONFIG_OMAP_RTC) || defined(CONFIG_OMAP_RTC)
+
+#define OMAP_RTC_BASE           0xfffb4800
+
+static struct resource rtc_resources[] = {
+        {
+                .start          = OMAP_RTC_BASE,
+                .end            = OMAP_RTC_BASE + 0x5f,
+                .flags          = IORESOURCE_MEM,
+        },
+        {
+                .start          = INT_RTC_TIMER,
+                .flags          = IORESOURCE_IRQ,
+        },
+        {
+                .start          = INT_RTC_ALARM,
+                .flags          = IORESOURCE_IRQ,
+        },
+};
+
+static struct platform_device omap_rtc_device = {
+        .name           = "omap_rtc",
+        .id             = -1,
+        .dev = {
+                .release        = omap_nop_release,
+        },
+        .num_resources  = ARRAY_SIZE(rtc_resources),
+        .resource       = rtc_resources,
+};
+
+static void omap_init_rtc(void)
+{
+        (void) platform_device_register(&omap_rtc_device);
+}
+#else
+static inline void omap_init_rtc(void) {}
+#endif
+
+/*-------------------------------------------------------------------------*/
+
+#if     defined(CONFIG_OMAP16XX_WATCHDOG) || defined(CONFIG_OMAP16XX_WATCHDOG_MODULE)
+
+#define OMAP_WDT_BASE           0xfffeb000
+
+static struct resource wdt_resources[] = {
+        {
+                .start          = OMAP_WDT_BASE,
+                .end            = OMAP_WDT_BASE + 0x4f,
+                .flags          = IORESOURCE_MEM,
+        },
+};
+
+static struct platform_device omap_wdt_device = {
+        .name      = "omap1610_wdt",
+        .id          = -1,
+        .dev = {
+                .release        = omap_nop_release,
+        },
+        .num_resources  = ARRAY_SIZE(wdt_resources),
+        .resource       = wdt_resources,
+};
+
+static void omap_init_wdt(void)
+{
+        (void) platform_device_register(&omap_wdt_device);
+}
+#else
+static inline void omap_init_wdt(void) {}
+#endif
+
+
+/*-------------------------------------------------------------------------*/
+
+/*
+ * This gets called after board-specific INIT_MACHINE, and initializes most
+ * on-chip peripherals accessible on this board (except for few like USB):
+ *
+ *  (a) Does any "standard config" pin muxing needed.  Board-specific
+ *      code will have muxed GPIO pins and done "nonstandard" setup;
+ *      that code could live in the boot loader.
+ *  (b) Populating board-specific platform_data with the data drivers
+ *      rely on to handle wiring variations.
+ *  (c) Creating platform devices as meaningful on this board and
+ *      with this kernel configuration.
+ *
+ * Claiming GPIOs, and setting their direction and initial values, is the
+ * responsibility of the device drivers.  So is responding to probe().
+ *
+ * Board-specific knowlege like creating devices or pin setup is to be
+ * kept out of drivers as much as possible.  In particular, pin setup
+ * may be handled by the boot loader, and drivers should expect it will
+ * normally have been done by the time they're probed.
+ */
+static int __init omap_init_devices(void)
+{
+        /* please keep these calls, and their implementations above,
+         * in alphabetical order so they're easier to sort through.
+         */
+        omap_init_i2c();
+        omap_init_irda();
+        omap_init_mmc();
+        omap_init_rtc();
+        omap_init_wdt();
+
+        return 0;
+}
+arch_initcall(omap_init_devices);
+