board-nokia770.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * linux/arch/arm/mach-omap1/board-nokia770.c
 *
 * Modified from board-generic.c
 */
#include <linux/clkdev.h>
#include <linux/irq.h>
#include <linux/gpio/consumer.h>
#include <linux/gpio/machine.h>
#include <linux/gpio/property.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/mutex.h>
#include <linux/platform_device.h>
#include <linux/property.h>
#include <linux/input.h>
#include <linux/omapfb.h>

#include <linux/spi/spi.h>
#include <linux/workqueue.h>
#include <linux/delay.h>

#include <linux/platform_data/keypad-omap.h>
#include <linux/platform_data/lcd-mipid.h>
#include <linux/platform_data/gpio-omap.h>

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

#include "mux.h"
#include "hardware.h"
#include "usb.h"
#include "common.h"
#include "clock.h"
#include "mmc.h"

static const struct software_node nokia770_mpuio_gpiochip_node = {
	.name = "mpuio",
};

static const struct software_node nokia770_gpiochip1_node = {
	.name = "gpio-0-15",
};

static const struct software_node nokia770_gpiochip2_node = {
	.name = "gpio-16-31",
};

static const struct software_node *nokia770_gpiochip_nodes[] = {
	&nokia770_mpuio_gpiochip_node,
	&nokia770_gpiochip1_node,
	&nokia770_gpiochip2_node,
	NULL
};

#define ADS7846_PENDOWN_GPIO	15

static const unsigned int nokia770_keymap[] = {
	KEY(1, 0, GROUP_0 | KEY_UP),
	KEY(2, 0, GROUP_1 | KEY_F5),
	KEY(0, 1, GROUP_0 | KEY_LEFT),
	KEY(1, 1, GROUP_0 | KEY_ENTER),
	KEY(2, 1, GROUP_0 | KEY_RIGHT),
	KEY(0, 2, GROUP_1 | KEY_ESC),
	KEY(1, 2, GROUP_0 | KEY_DOWN),
	KEY(2, 2, GROUP_1 | KEY_F4),
	KEY(0, 3, GROUP_2 | KEY_F7),
	KEY(1, 3, GROUP_2 | KEY_F8),
	KEY(2, 3, GROUP_2 | KEY_F6),
};

static struct resource nokia770_kp_resources[] = {
	[0] = {
		.start	= INT_KEYBOARD,
		.end	= INT_KEYBOARD,
		.flags	= IORESOURCE_IRQ,
	},
};

static const struct matrix_keymap_data nokia770_keymap_data = {
	.keymap		= nokia770_keymap,
	.keymap_size	= ARRAY_SIZE(nokia770_keymap),
};

static struct omap_kp_platform_data nokia770_kp_data = {
	.rows		= 8,
	.cols		= 8,
	.keymap_data	= &nokia770_keymap_data,
	.delay		= 4,
};

static struct platform_device nokia770_kp_device = {
	.name		= "omap-keypad",
	.id		= -1,
	.dev		= {
		.platform_data = &nokia770_kp_data,
	},
	.num_resources	= ARRAY_SIZE(nokia770_kp_resources),
	.resource	= nokia770_kp_resources,
};

static struct platform_device *nokia770_devices[] __initdata = {
	&nokia770_kp_device,
};

static struct mipid_platform_data nokia770_mipid_platform_data = { };

static const struct omap_lcd_config nokia770_lcd_config __initconst = {
	.ctrl_name	= "hwa742",
};

static const struct property_entry nokia770_mipid_props[] = {
	PROPERTY_ENTRY_GPIO("reset-gpios", &nokia770_gpiochip1_node,
			    13, GPIO_ACTIVE_LOW),
	{ }
};

static const struct software_node nokia770_mipid_swnode = {
	.name = "lcd_mipid",
	.properties = nokia770_mipid_props,
};

static void __init mipid_dev_init(void)
{
	nokia770_mipid_platform_data.data_lines = 16;

	omapfb_set_lcd_config(&nokia770_lcd_config);
}

static const struct property_entry nokia770_ads7846_props[] = {
	PROPERTY_ENTRY_STRING("compatible", "ti,ads7846"),
	PROPERTY_ENTRY_U32("touchscreen-size-x", 4096),
	PROPERTY_ENTRY_U32("touchscreen-size-y", 4096),
	PROPERTY_ENTRY_U32("touchscreen-max-pressure", 256),
	PROPERTY_ENTRY_U32("touchscreen-average-samples", 10),
	PROPERTY_ENTRY_U16("ti,x-plate-ohms", 180),
	PROPERTY_ENTRY_U16("ti,debounce-tol", 3),
	PROPERTY_ENTRY_U16("ti,debounce-rep", 1),
	PROPERTY_ENTRY_GPIO("pendown-gpios", &nokia770_gpiochip1_node,
			    ADS7846_PENDOWN_GPIO, GPIO_ACTIVE_LOW),
	{ }
};

static const struct software_node nokia770_ads7846_swnode = {
	.name = "ads7846",
	.properties = nokia770_ads7846_props,
};

static struct spi_board_info nokia770_spi_board_info[] __initdata = {
	[0] = {
		.modalias       = "lcd_mipid",
		.bus_num        = 2,
		.chip_select    = 3,
		.max_speed_hz   = 12000000,
		.platform_data	= &nokia770_mipid_platform_data,
		.swnode         = &nokia770_mipid_swnode,
	},
	[1] = {
		.modalias       = "ads7846",
		.bus_num        = 2,
		.chip_select    = 0,
		.max_speed_hz   = 2500000,
		.swnode         = &nokia770_ads7846_swnode,
	},
};

static void __init hwa742_dev_init(void)
{
	clk_add_alias("hwa_sys_ck", NULL, "bclk", NULL);
}

/* assume no Mini-AB port */

static struct omap_usb_config nokia770_usb_config __initdata = {
	.otg		= 1,
	.register_host	= 1,
	.register_dev	= 1,
	.hmc_mode	= 16,
	.pins[0]	= 6,
	.extcon		= "tahvo-usb",
};

#if IS_ENABLED(CONFIG_MMC_OMAP)

static struct gpiod_lookup_table nokia770_mmc_gpio_table = {
	.dev_id = "mmci-omap.1",
	.table = {
		/* Slot index 0, VSD power, GPIO 41 */
		GPIO_LOOKUP_IDX("gpio-32-47", 9,
				"vsd", 0, GPIO_ACTIVE_HIGH),
		/* Slot index 0, switch, GPIO 23 */
		GPIO_LOOKUP_IDX("gpio-16-31", 7,
				"cover", 0, GPIO_ACTIVE_HIGH),
		{ }
	},
};

static struct omap_mmc_platform_data nokia770_mmc2_data = {
	.nr_slots                       = 1,
	.max_freq                       = 12000000,
	.slots[0]       = {
		.ocr_mask               = MMC_VDD_32_33|MMC_VDD_33_34,
		.name                   = "mmcblk",
	},
};

static struct omap_mmc_platform_data *nokia770_mmc_data[OMAP16XX_NR_MMC];

static void __init nokia770_mmc_init(void)
{
	gpiod_add_lookup_table(&nokia770_mmc_gpio_table);
	/* Only the second MMC controller is used */
	nokia770_mmc_data[1] = &nokia770_mmc2_data;
	omap1_init_mmc(nokia770_mmc_data, OMAP16XX_NR_MMC);
}

#else
static inline void nokia770_mmc_init(void)
{
}
#endif

#if IS_ENABLED(CONFIG_I2C_CBUS_GPIO)

static const struct software_node_ref_args nokia770_cbus_gpio_refs[] = {
	SOFTWARE_NODE_REFERENCE(&nokia770_mpuio_gpiochip_node, 9, 0),
	SOFTWARE_NODE_REFERENCE(&nokia770_mpuio_gpiochip_node, 10, 0),
	SOFTWARE_NODE_REFERENCE(&nokia770_mpuio_gpiochip_node, 11, 0),
};

static const struct property_entry nokia770_cbus_props[] = {
	PROPERTY_ENTRY_REF_ARRAY("gpios", nokia770_cbus_gpio_refs),
	{ }
};

static struct platform_device nokia770_cbus_device = {
	.name   = "i2c-cbus-gpio",
	.id     = 2,
};

static struct i2c_board_info nokia770_i2c_board_info_2[] __initdata = {
	{
		I2C_BOARD_INFO("retu", 0x01),
	},
	{
		I2C_BOARD_INFO("tahvo", 0x02),
	},
};

static void __init nokia770_cbus_init(void)
{
	struct gpio_desc *d;
	int irq;

	d = gpiod_get(NULL, "retu_irq", GPIOD_IN);
	if (IS_ERR(d)) {
		pr_err("Unable to get CBUS Retu IRQ GPIO descriptor\n");
	} else {
		irq = gpiod_to_irq(d);
		irq_set_irq_type(irq, IRQ_TYPE_EDGE_RISING);
		nokia770_i2c_board_info_2[0].irq = irq;
	}
	d = gpiod_get(NULL, "tahvo_irq", GPIOD_IN);
	if (IS_ERR(d)) {
		pr_err("Unable to get CBUS Tahvo IRQ GPIO descriptor\n");
	} else {
		irq = gpiod_to_irq(d);
		irq_set_irq_type(irq, IRQ_TYPE_EDGE_RISING);
		nokia770_i2c_board_info_2[1].irq = irq;
	}
	i2c_register_board_info(2, nokia770_i2c_board_info_2,
				ARRAY_SIZE(nokia770_i2c_board_info_2));
	device_create_managed_software_node(&nokia770_cbus_device.dev,
					    nokia770_cbus_props, NULL);
	platform_device_register(&nokia770_cbus_device);
}
#else /* CONFIG_I2C_CBUS_GPIO */
static void __init nokia770_cbus_init(void)
{
}
#endif /* CONFIG_I2C_CBUS_GPIO */

static struct gpiod_lookup_table nokia770_irq_gpio_table = {
	.dev_id = NULL,
	.table = {
		/* GPIO used by SPI device 1 */
		GPIO_LOOKUP("gpio-0-15", 15, "ads7846_irq",
			    GPIO_ACTIVE_HIGH),
		/* GPIO used for retu IRQ */
		GPIO_LOOKUP("gpio-48-63", 14, "retu_irq",
			    GPIO_ACTIVE_HIGH),
		/* GPIO used for tahvo IRQ */
		GPIO_LOOKUP("gpio-32-47", 8, "tahvo_irq",
			    GPIO_ACTIVE_HIGH),
		/* GPIOs used by 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 omap_nokia770_init(void)
{
	struct gpio_desc *d;

	/* On Nokia 770, the SleepX signal is masked with an
	 * MPUIO line by default.  It has to be unmasked for it
	 * to become functional */

	/* SleepX mask direction */
	omap_writew((omap_readw(0xfffb5008) & ~2), 0xfffb5008);
	/* Unmask SleepX signal */
	omap_writew((omap_readw(0xfffb5004) & ~2), 0xfffb5004);

	software_node_register_node_group(nokia770_gpiochip_nodes);
	platform_add_devices(nokia770_devices, ARRAY_SIZE(nokia770_devices));

	gpiod_add_lookup_table(&nokia770_irq_gpio_table);
	d = gpiod_get(NULL, "ads7846_irq", GPIOD_IN);
	if (IS_ERR(d))
		pr_err("Unable to get ADS7846 IRQ GPIO descriptor\n");
	else
		nokia770_spi_board_info[1].irq = gpiod_to_irq(d);

	spi_register_board_info(nokia770_spi_board_info,
				ARRAY_SIZE(nokia770_spi_board_info));
	omap_serial_init();
	omap_register_i2c_bus(1, 100, NULL, 0);
	hwa742_dev_init();
	mipid_dev_init();
	omap1_usb_init(&nokia770_usb_config);
	nokia770_mmc_init();
	nokia770_cbus_init();
}

MACHINE_START(NOKIA770, "Nokia 770")
	.atag_offset	= 0x100,
	.map_io		= omap1_map_io,
	.init_early     = omap1_init_early,
	.init_irq	= omap1_init_irq,
	.init_machine	= omap_nokia770_init,
	.init_late	= omap1_init_late,
	.init_time	= omap1_timer_init,
	.restart	= omap1_restart,
MACHINE_END