// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * linux/arch/arm/mach-omap1/devices.c
 *
 * OMAP1 platform device setup/initialization
 */

#include <linux/dma-mapping.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/spi/spi.h>

#include <linux/platform_data/omap-wd-timer.h>
#include <linux/soc/ti/omap1-io.h>

#include <asm/mach/map.h>

#include "tc.h"
#include "mux.h"

#include "hardware.h"
#include "common.h"
#include "clock.h"
#include "mmc.h"
#include "sram.h"

#if IS_ENABLED(CONFIG_RTC_DRV_OMAP)

#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,
        .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 IS_ENABLED(CONFIG_MMC_OMAP)

static inline void omap1_mmc_mux(struct omap_mmc_platform_data *mmc_controller,
                        int controller_nr)
{
        if (controller_nr == 0) {
                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_controller->slots[0].wires == 4) {
                        omap_cfg_reg(MMC_DAT1);
                        /* NOTE: DAT2 can be on W10 (here) or M15 */
                        if (!mmc_controller->slots[0].nomux)
                                omap_cfg_reg(MMC_DAT2);
                        omap_cfg_reg(MMC_DAT3);
                }
        }

        /* Block 2 is on newer chips, and has many pinout options */
        if (cpu_is_omap16xx() && controller_nr == 1) {
                if (!mmc_controller->slots[1].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_controller->slots[1].wires == 4) {
                                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);
        }
}

#define OMAP_MMC_NR_RES         4

/*
 * Register MMC devices.
 */
static int __init omap_mmc_add(const char *name, int id, unsigned long base,
                                unsigned long size, unsigned int irq,
                                unsigned rx_req, unsigned tx_req,
                                struct omap_mmc_platform_data *data)
{
        struct platform_device *pdev;
        struct resource res[OMAP_MMC_NR_RES];
        int ret;

        pdev = platform_device_alloc(name, id);
        if (!pdev)
                return -ENOMEM;

        memset(res, 0, OMAP_MMC_NR_RES * sizeof(struct resource));
        res[0].start = base;
        res[0].end = base + size - 1;
        res[0].flags = IORESOURCE_MEM;
        res[1].start = res[1].end = irq;
        res[1].flags = IORESOURCE_IRQ;
        res[2].start = rx_req;
        res[2].name = "rx";
        res[2].flags = IORESOURCE_DMA;
        res[3].start = tx_req;
        res[3].name = "tx";
        res[3].flags = IORESOURCE_DMA;

        if (cpu_is_omap15xx())
                data->slots[0].features = MMC_OMAP15XX;
        if (cpu_is_omap16xx())
                data->slots[0].features = MMC_OMAP16XX;

        ret = platform_device_add_resources(pdev, res, ARRAY_SIZE(res));
        if (ret == 0)
                ret = platform_device_add_data(pdev, data, sizeof(*data));
        if (ret)
                goto fail;

        ret = platform_device_add(pdev);
        if (ret)
                goto fail;

        /* return device handle to board setup code */
        data->dev = &pdev->dev;
        return 0;

fail:
        platform_device_put(pdev);
        return ret;
}

void __init omap1_init_mmc(struct omap_mmc_platform_data **mmc_data,
                        int nr_controllers)
{
        int i;

        for (i = 0; i < nr_controllers; i++) {
                unsigned long base, size;
                unsigned rx_req, tx_req;
                unsigned int irq = 0;

                if (!mmc_data[i])
                        continue;

                omap1_mmc_mux(mmc_data[i], i);

                switch (i) {
                case 0:
                        base = OMAP1_MMC1_BASE;
                        irq = INT_MMC;
                        rx_req = 22;
                        tx_req = 21;
                        break;
                case 1:
                        if (!cpu_is_omap16xx())
                                return;
                        base = OMAP1_MMC2_BASE;
                        irq = INT_1610_MMC2;
                        rx_req = 55;
                        tx_req = 54;
                        break;
                default:
                        continue;
                }
                size = OMAP1_MMC_SIZE;

                omap_mmc_add("mmci-omap", i, base, size, irq,
                                rx_req, tx_req, mmc_data[i]);
        }
}

#endif

/*-------------------------------------------------------------------------*/

/* Numbering for the SPI-capable controllers when used for SPI:
 * spi          = 1
 * uwire        = 2
 * mmc1..2      = 3..4
 * mcbsp1..3    = 5..7
 */

#if IS_ENABLED(CONFIG_SPI_OMAP_UWIRE)

#define OMAP_UWIRE_BASE         0xfffb3000

static struct resource uwire_resources[] = {
        {
                .start          = OMAP_UWIRE_BASE,
                .end            = OMAP_UWIRE_BASE + 0x20,
                .flags          = IORESOURCE_MEM,
        },
};

static struct platform_device omap_uwire_device = {
        .name      = "omap_uwire",
        .id          = -1,
        .num_resources  = ARRAY_SIZE(uwire_resources),
        .resource       = uwire_resources,
};

static void omap_init_uwire(void)
{
        /* FIXME define and use a boot tag; not all boards will be hooking
         * up devices to the microwire controller, and multi-board configs
         * mean that CONFIG_SPI_OMAP_UWIRE may be configured anyway...
         */

        /* board-specific code must configure chipselects (only a few
         * are normally used) and SCLK/SDI/SDO (each has two choices).
         */
        (void) platform_device_register(&omap_uwire_device);
}
#else
static inline void omap_init_uwire(void) {}
#endif


#define OMAP1_RNG_BASE          0xfffe5000

static struct resource omap1_rng_resources[] = {
        {
                .start          = OMAP1_RNG_BASE,
                .end            = OMAP1_RNG_BASE + 0x4f,
                .flags          = IORESOURCE_MEM,
        },
};

static struct platform_device omap1_rng_device = {
        .name           = "omap_rng",
        .id             = -1,
        .num_resources  = ARRAY_SIZE(omap1_rng_resources),
        .resource       = omap1_rng_resources,
};

static void omap1_init_rng(void)
{
        if (!cpu_is_omap16xx())
                return;

        (void) platform_device_register(&omap1_rng_device);
}

/*-------------------------------------------------------------------------*/

/*
 * 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 knowledge 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 omap1_init_devices(void)
{
        if (!cpu_class_is_omap1())
                return -ENODEV;

        omap1_sram_init();
        omap1_clk_late_init();

        /* please keep these calls, and their implementations above,
         * in alphabetical order so they're easier to sort through.
         */

        omap_init_rtc();
        omap_init_uwire();
        omap1_init_rng();

        return 0;
}
arch_initcall(omap1_init_devices);

#if IS_ENABLED(CONFIG_OMAP_WATCHDOG)

static struct resource wdt_resources[] = {
        {
                .start          = 0xfffeb000,
                .end            = 0xfffeb07F,
                .flags          = IORESOURCE_MEM,
        },
};

static struct platform_device omap_wdt_device = {
        .name           = "omap_wdt",
        .id             = -1,
        .num_resources  = ARRAY_SIZE(wdt_resources),
        .resource       = wdt_resources,
};

static int __init omap_init_wdt(void)
{
        struct omap_wd_timer_platform_data pdata;
        int ret;

        if (!cpu_is_omap16xx())
                return -ENODEV;

        pdata.read_reset_sources = omap1_get_reset_sources;

        ret = platform_device_register(&omap_wdt_device);
        if (!ret) {
                ret = platform_device_add_data(&omap_wdt_device, &pdata,
                                               sizeof(pdata));
                if (ret)
                        platform_device_del(&omap_wdt_device);
        }

        return ret;
}
subsys_initcall(omap_init_wdt);
#endif