/*
 * linux/arch/arm/mach-omap1/board-osk.c
 *
 * Board specific init for OMAP5912 OSK
 *
 * Written by Dirk Behme <dirk.behme@de.bosch.com>
 *
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * You should have received a copy of the  GNU General Public License along
 * with this program; if not, write  to the Free Software Foundation, Inc.,
 * 675 Mass Ave, Cambridge, MA 02139, USA.
 */
#include <linux/gpio/consumer.h>
#include <linux/gpio/driver.h>
#include <linux/gpio/machine.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/i2c.h>
#include <linux/leds.h>
#include <linux/smc91x.h>
#include <linux/omapfb.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
#include <linux/mtd/physmap.h>
#include <linux/mfd/tps65010.h>
#include <linux/platform_data/gpio-omap.h>
#include <linux/platform_data/omap1_bl.h>
#include <linux/soc/ti/omap1-io.h>

#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>

#include "tc.h"
#include "flash.h"
#include "mux.h"
#include "hardware.h"
#include "usb.h"
#include "common.h"

/* Name of the GPIO chip used by the OMAP for GPIOs 0..15 */
#define OMAP_GPIO_LABEL         "gpio-0-15"

/* At OMAP5912 OSK the Ethernet is directly connected to CS1 */
#define OMAP_OSK_ETHR_START             0x04800300

/* TPS65010 has four GPIOs.  nPG and LED2 can be treated like GPIOs with
 * alternate pin configurations for hardware-controlled blinking.
 */
#define OSK_TPS_GPIO_USB_PWR_EN 0
#define OSK_TPS_GPIO_LED_D3     1
#define OSK_TPS_GPIO_LAN_RESET  2
#define OSK_TPS_GPIO_DSP_PWR_EN 3
#define OSK_TPS_GPIO_LED_D9     4
#define OSK_TPS_GPIO_LED_D2     5

static struct mtd_partition osk_partitions[] = {
        /* bootloader (U-Boot, etc) in first sector */
        {
              .name             = "bootloader",
              .offset           = 0,
              .size             = SZ_128K,
              .mask_flags       = MTD_WRITEABLE, /* force read-only */
        },
        /* bootloader params in the next sector */
        {
              .name             = "params",
              .offset           = MTDPART_OFS_APPEND,
              .size             = SZ_128K,
              .mask_flags       = 0,
        }, {
              .name             = "kernel",
              .offset           = MTDPART_OFS_APPEND,
              .size             = SZ_2M,
              .mask_flags       = 0
        }, {
              .name             = "filesystem",
              .offset           = MTDPART_OFS_APPEND,
              .size             = MTDPART_SIZ_FULL,
              .mask_flags       = 0
        }
};

static struct physmap_flash_data osk_flash_data = {
        .width          = 2,
        .set_vpp        = omap1_set_vpp,
        .parts          = osk_partitions,
        .nr_parts       = ARRAY_SIZE(osk_partitions),
};

static struct resource osk_flash_resource = {
        /* this is on CS3, wherever it's mapped */
        .flags          = IORESOURCE_MEM,
};

static struct platform_device osk5912_flash_device = {
        .name           = "physmap-flash",
        .id             = 0,
        .dev            = {
                .platform_data  = &osk_flash_data,
        },
        .num_resources  = 1,
        .resource       = &osk_flash_resource,
};

static struct smc91x_platdata osk5912_smc91x_info = {
        .flags  = SMC91X_USE_16BIT | SMC91X_NOWAIT,
        .leda   = RPC_LED_100_10,
        .ledb   = RPC_LED_TX_RX,
};

static struct resource osk5912_smc91x_resources[] = {
        [0] = {
                .start  = OMAP_OSK_ETHR_START,          /* Physical */
                .end    = OMAP_OSK_ETHR_START + 0xf,
                .flags  = IORESOURCE_MEM,
        },
        [1] = {
                .flags  = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
        },
};

static struct platform_device osk5912_smc91x_device = {
        .name           = "smc91x",
        .id             = -1,
        .dev    = {
                .platform_data  = &osk5912_smc91x_info,
        },
        .num_resources  = ARRAY_SIZE(osk5912_smc91x_resources),
        .resource       = osk5912_smc91x_resources,
};

static struct resource osk5912_cf_resources[] = {
        [0] = {
                .flags  = IORESOURCE_IRQ,
        },
        [1] = {
                .flags = IORESOURCE_MEM,
        },
};

static struct platform_device osk5912_cf_device = {
        .name           = "omap_cf",
        .id             = -1,
        .num_resources  = ARRAY_SIZE(osk5912_cf_resources),
        .resource       = osk5912_cf_resources,
};

static struct platform_device *osk5912_devices[] __initdata = {
        &osk5912_flash_device,
        &osk5912_smc91x_device,
        &osk5912_cf_device,
};

static const struct gpio_led tps_leds[] = {
        /* NOTE:  D9 and D2 have hardware blink support.
         * Also, D9 requires non-battery power.
         */
        { .name = "d9", .default_trigger = "disk-activity", },
        { .name = "d2", },
        { .name = "d3", .default_trigger = "heartbeat", },
};

static struct gpiod_lookup_table tps_leds_gpio_table = {
        .dev_id = "leds-gpio",
        .table = {
                /* Use local offsets on TPS65010 */
                GPIO_LOOKUP_IDX("tps65010", OSK_TPS_GPIO_LED_D9, NULL, 0, GPIO_ACTIVE_HIGH),
                GPIO_LOOKUP_IDX("tps65010", OSK_TPS_GPIO_LED_D2, NULL, 1, GPIO_ACTIVE_HIGH),
                GPIO_LOOKUP_IDX("tps65010", OSK_TPS_GPIO_LED_D3, NULL, 2, GPIO_ACTIVE_LOW),
                { }
        },
};

static struct gpio_led_platform_data tps_leds_data = {
        .num_leds       = 3,
        .leds           = tps_leds,
};

static struct platform_device osk5912_tps_leds = {
        .name                   = "leds-gpio",
        .id                     = 0,
        .dev.platform_data      = &tps_leds_data,
};

/* The board just hold these GPIOs hogged from setup to teardown */
static struct gpio_desc *eth_reset;
static struct gpio_desc *vdd_dsp;

static int osk_tps_setup(struct i2c_client *client, struct gpio_chip *gc)
{
        struct gpio_desc *d;
        if (!IS_BUILTIN(CONFIG_TPS65010))
                return -ENOSYS;

        /* Set GPIO 1 HIGH to disable VBUS power supply;
         * OHCI driver powers it up/down as needed.
         */
        d = gpiochip_request_own_desc(gc, OSK_TPS_GPIO_USB_PWR_EN, "n_vbus_en",
                                      GPIO_ACTIVE_HIGH, GPIOD_OUT_HIGH);
        /* Free the GPIO again as the driver will request it */
        gpiochip_free_own_desc(d);

        /* Set GPIO 2 high so LED D3 is off by default */
        tps65010_set_gpio_out_value(GPIO2, HIGH);

        /* Set GPIO 3 low to take ethernet out of reset */
        eth_reset = gpiochip_request_own_desc(gc, OSK_TPS_GPIO_LAN_RESET, "smc_reset",
                                              GPIO_ACTIVE_HIGH, GPIOD_OUT_LOW);

        /* GPIO4 is VDD_DSP */
        vdd_dsp = gpiochip_request_own_desc(gc, OSK_TPS_GPIO_DSP_PWR_EN, "dsp_power",
                                            GPIO_ACTIVE_HIGH, GPIOD_OUT_HIGH);
        /* REVISIT if DSP support isn't configured, power it off ... */

        /* Let LED1 (D9) blink; leds-gpio may override it */
        tps65010_set_led(LED1, BLINK);

        /* Set LED2 off by default */
        tps65010_set_led(LED2, OFF);

        /* Enable LOW_PWR handshake */
        tps65010_set_low_pwr(ON);

        /* Switch VLDO2 to 3.0V for AIC23 */
        tps65010_config_vregs1(TPS_LDO2_ENABLE | TPS_VLDO2_3_0V
                        | TPS_LDO1_ENABLE);

        /* register these three LEDs */
        osk5912_tps_leds.dev.parent = &client->dev;
        gpiod_add_lookup_table(&tps_leds_gpio_table);
        platform_device_register(&osk5912_tps_leds);

        return 0;
}

static void osk_tps_teardown(struct i2c_client *client, struct gpio_chip *gc)
{
        gpiochip_free_own_desc(eth_reset);
        gpiochip_free_own_desc(vdd_dsp);
}

static struct tps65010_board tps_board = {
        .outmask        = 0x0f,
        .setup          = osk_tps_setup,
        .teardown       = osk_tps_teardown,
};

static struct i2c_board_info __initdata osk_i2c_board_info[] = {
        {
                /* This device will get the name "i2c-tps65010" */
                I2C_BOARD_INFO("tps65010", 0x48),
                .dev_name = "tps65010",
                .platform_data  = &tps_board,

        },
        {
                I2C_BOARD_INFO("tlv320aic23", 0x1B),
        },
        /* TODO when driver support is ready:
         *  - optionally on Mistral, ov9640 camera sensor at 0x30
         */
};

static void __init osk_init_smc91x(void)
{
        u32 l;

        /* Check EMIFS wait states to fix errors with SMC_GET_PKT_HDR */
        l = omap_readl(EMIFS_CCS(1));
        l |= 0x3;
        omap_writel(l, EMIFS_CCS(1));
}

static void __init osk_init_cf(int seg)
{
        struct resource *res = &osk5912_cf_resources[1];

        omap_cfg_reg(M7_1610_GPIO62);

        switch (seg) {
        /* NOTE: CS0 could be configured too ... */
        case 1:
                res->start = OMAP_CS1_PHYS;
                break;
        case 2:
                res->start = OMAP_CS2_PHYS;
                break;
        case 3:
                res->start = omap_cs3_phys();
                break;
        }

        res->end = res->start + SZ_8K - 1;
        osk5912_cf_device.dev.platform_data = (void *)(uintptr_t)seg;

        /* NOTE:  better EMIFS setup might support more cards; but the
         * TRM only shows how to affect regular flash signals, not their
         * CF/PCMCIA variants...
         */
        pr_debug("%s: cs%d, previous ccs %08x acs %08x\n", __func__,
                seg, omap_readl(EMIFS_CCS(seg)), omap_readl(EMIFS_ACS(seg)));
        omap_writel(0x0004a1b3, EMIFS_CCS(seg));        /* synch mode 4 etc */
        omap_writel(0x00000000, EMIFS_ACS(seg));        /* OE hold/setup */
}

static struct gpiod_lookup_table osk_usb_gpio_table = {
        .dev_id = "ohci",
        .table = {
                /* Power GPIO on the I2C-attached TPS65010 */
                GPIO_LOOKUP("tps65010", OSK_TPS_GPIO_USB_PWR_EN, "power",
                            GPIO_ACTIVE_HIGH),
                GPIO_LOOKUP(OMAP_GPIO_LABEL, 9, "overcurrent",
                            GPIO_ACTIVE_HIGH),
                { }
        },
};

static struct omap_usb_config osk_usb_config __initdata = {
        /* has usb host connector (A) ... for development it can also
         * be used, with a NONSTANDARD gender-bending cable/dongle, as
         * a peripheral.
         */
#if IS_ENABLED(CONFIG_USB_OMAP)
        .register_dev   = 1,
        .hmc_mode       = 0,
#else
        .register_host  = 1,
        .hmc_mode       = 16,
        .rwc            = 1,
#endif
        .pins[0]        = 2,
};

#define EMIFS_CS3_VAL   (0x88013141)

static struct gpiod_lookup_table osk_irq_gpio_table = {
        .dev_id = NULL,
        .table = {
                /* GPIO used for SMC91x IRQ */
                GPIO_LOOKUP(OMAP_GPIO_LABEL, 0, "smc_irq",
                            GPIO_ACTIVE_HIGH),
                /* GPIO used for CF IRQ */
                GPIO_LOOKUP("gpio-48-63", 14, "cf_irq",
                            GPIO_ACTIVE_HIGH),
                /* GPIO used by the TPS65010 chip */
                GPIO_LOOKUP("mpuio", 1, "tps65010",
                            GPIO_ACTIVE_HIGH),
                /* GPIOs used for serial wakeup IRQs */
                GPIO_LOOKUP_IDX("gpio-32-47", 5, "wakeup", 0,
                            GPIO_ACTIVE_HIGH),
                GPIO_LOOKUP_IDX("gpio-16-31", 2, "wakeup", 1,
                            GPIO_ACTIVE_HIGH),
                GPIO_LOOKUP_IDX("gpio-48-63", 1, "wakeup", 2,
                            GPIO_ACTIVE_HIGH),
                { }
        },
};

static void __init osk_init(void)
{
        struct gpio_desc *d;
        u32 l;

        osk_init_smc91x();
        osk_init_cf(2); /* CS2 */

        /* Workaround for wrong CS3 (NOR flash) timing
         * There are some U-Boot versions out there which configure
         * wrong CS3 memory timings. This mainly leads to CRC
         * or similar errors if you use NOR flash (e.g. with JFFS2)
         */
        l = omap_readl(EMIFS_CCS(3));
        if (l != EMIFS_CS3_VAL)
                omap_writel(EMIFS_CS3_VAL, EMIFS_CCS(3));

        osk_flash_resource.end = osk_flash_resource.start = omap_cs3_phys();
        osk_flash_resource.end += SZ_32M - 1;

        /*
         * Add the GPIOs to be used as IRQs and immediately look them up
         * to be passed as an IRQ resource. This is ugly but should work
         * until the day we convert to device tree.
         */
        gpiod_add_lookup_table(&osk_irq_gpio_table);

        d = gpiod_get(NULL, "smc_irq", GPIOD_IN);
        if (IS_ERR(d)) {
                pr_err("Unable to get SMC IRQ GPIO descriptor\n");
        } else {
                irq_set_irq_type(gpiod_to_irq(d), IRQ_TYPE_EDGE_RISING);
                osk5912_smc91x_resources[1] = DEFINE_RES_IRQ(gpiod_to_irq(d));
        }

        d = gpiod_get(NULL, "cf_irq", GPIOD_IN);
        if (IS_ERR(d)) {
                pr_err("Unable to get CF IRQ GPIO descriptor\n");
        } else {
                /* the CF I/O IRQ is really active-low */
                irq_set_irq_type(gpiod_to_irq(d), IRQ_TYPE_EDGE_FALLING);
                osk5912_cf_resources[0] = DEFINE_RES_IRQ(gpiod_to_irq(d));
        }

        platform_add_devices(osk5912_devices, ARRAY_SIZE(osk5912_devices));

        l = omap_readl(USB_TRANSCEIVER_CTRL);
        l |= (3 << 1);
        omap_writel(l, USB_TRANSCEIVER_CTRL);

        gpiod_add_lookup_table(&osk_usb_gpio_table);
        omap1_usb_init(&osk_usb_config);

        omap_serial_init();

        /* irq for tps65010 chip */
        /* bootloader effectively does:  omap_cfg_reg(U19_1610_MPUIO1); */
        d = gpiod_get(NULL, "tps65010", GPIOD_IN);
        if (IS_ERR(d))
                pr_err("Unable to get TPS65010 IRQ GPIO descriptor\n");
        else
                osk_i2c_board_info[0].irq = gpiod_to_irq(d);
        omap_register_i2c_bus(1, 400, osk_i2c_board_info,
                              ARRAY_SIZE(osk_i2c_board_info));
}

MACHINE_START(OMAP_OSK, "TI-OSK")
        /* Maintainer: Dirk Behme <dirk.behme@de.bosch.com> */
        .atag_offset    = 0x100,
        .map_io         = omap1_map_io,
        .init_early     = omap1_init_early,
        .init_irq       = omap1_init_irq,
        .init_machine   = osk_init,
        .init_late      = omap1_init_late,
        .init_time      = omap1_timer_init,
        .restart        = omap1_restart,
MACHINE_END