/*
 * MTX-1 platform devices registration (Au1500)
 *
 * Copyright (C) 2007-2009, Florian Fainelli <florian@openwrt.org>
 *
 * 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 program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * 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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/leds.h>
#include <linux/gpio.h>
#include <linux/gpio/machine.h>
#include <linux/gpio_keys.h>
#include <linux/input.h>
#include <linux/mtd/partitions.h>
#include <linux/mtd/physmap.h>
#include <mtd/mtd-abi.h>
#include <asm/bootinfo.h>
#include <asm/reboot.h>
#include <asm/setup.h>
#include <asm/mach-au1x00/au1000.h>
#include <asm/mach-au1x00/gpio-au1000.h>
#include <asm/mach-au1x00/au1xxx_eth.h>
#include <prom.h>

const char *get_system_type(void)
{
	return "MTX-1";
}

void __init prom_init(void)
{
	unsigned char *memsize_str;
	unsigned long memsize;

	prom_argc = fw_arg0;
	prom_argv = (char **)fw_arg1;
	prom_envp = (char **)fw_arg2;

	prom_init_cmdline();

	memsize_str = prom_getenv("memsize");
	if (!memsize_str || kstrtoul(memsize_str, 0, &memsize))
		memsize = 0x04000000;
	add_memory_region(0, memsize, BOOT_MEM_RAM);
}

void prom_putchar(char c)
{
	alchemy_uart_putchar(AU1000_UART0_PHYS_ADDR, c);
}

static void mtx1_reset(char *c)
{
	/* Jump to the reset vector */
	__asm__ __volatile__("jr\t%0" : : "r"(0xbfc00000));
}

static void mtx1_power_off(void)
{
	while (1)
		asm volatile (
		"	.set	mips32					\n"
		"	wait						\n"
		"	.set	mips0					\n");
}

void __init board_setup(void)
{
#if IS_ENABLED(CONFIG_USB_OHCI_HCD)
	/* Enable USB power switch */
	alchemy_gpio_direction_output(204, 0);
#endif /* IS_ENABLED(CONFIG_USB_OHCI_HCD) */

	/* Initialize sys_pinfunc */
	alchemy_wrsys(SYS_PF_NI2, AU1000_SYS_PINFUNC);

	/* Initialize GPIO */
	alchemy_wrsys(~0, AU1000_SYS_TRIOUTCLR);
	alchemy_gpio_direction_output(0, 0);	/* Disable M66EN (PCI 66MHz) */
	alchemy_gpio_direction_output(3, 1);	/* Disable PCI CLKRUN# */
	alchemy_gpio_direction_output(1, 1);	/* Enable EXT_IO3 */
	alchemy_gpio_direction_output(5, 0);	/* Disable eth PHY TX_ER */

	/* Enable LED and set it to green */
	alchemy_gpio_direction_output(211, 1);	/* green on */
	alchemy_gpio_direction_output(212, 0);	/* red off */

	pm_power_off = mtx1_power_off;
	_machine_halt = mtx1_power_off;
	_machine_restart = mtx1_reset;

	printk(KERN_INFO "4G Systems MTX-1 Board\n");
}

/******************************************************************************/

static struct gpio_keys_button mtx1_gpio_button[] = {
	{
		.gpio = 207,
		.code = BTN_0,
		.desc = "System button",
	}
};

static struct gpio_keys_platform_data mtx1_buttons_data = {
	.buttons = mtx1_gpio_button,
	.nbuttons = ARRAY_SIZE(mtx1_gpio_button),
};

static struct platform_device mtx1_button = {
	.name = "gpio-keys",
	.id = -1,
	.dev = {
		.platform_data = &mtx1_buttons_data,
	}
};

static struct gpiod_lookup_table mtx1_wdt_gpio_table = {
	.dev_id = "mtx1-wdt.0",
	.table = {
		/* Global number 215 is offset 15 on Alchemy GPIO 2 */
		GPIO_LOOKUP("alchemy-gpio2", 15, NULL, GPIO_ACTIVE_HIGH),
		{ },
	},
};

static struct platform_device mtx1_wdt = {
	.name = "mtx1-wdt",
	.id = 0,
};

static const struct gpio_led default_leds[] = {
	{
		.name	= "mtx1:green",
		.gpio = 211,
	}, {
		.name = "mtx1:red",
		.gpio = 212,
	},
};

static struct gpio_led_platform_data mtx1_led_data = {
	.num_leds = ARRAY_SIZE(default_leds),
	.leds = default_leds,
};

static struct platform_device mtx1_gpio_leds = {
	.name = "leds-gpio",
	.id = -1,
	.dev = {
		.platform_data = &mtx1_led_data,
	}
};

static struct mtd_partition mtx1_mtd_partitions[] = {
	{
		.name	= "filesystem",
		.size	= 0x01C00000,
		.offset = 0,
	},
	{
		.name	= "yamon",
		.size	= 0x00100000,
		.offset = MTDPART_OFS_APPEND,
		.mask_flags = MTD_WRITEABLE,
	},
	{
		.name	= "kernel",
		.size	= 0x002c0000,
		.offset = MTDPART_OFS_APPEND,
	},
	{
		.name	= "yamon env",
		.size	= 0x00040000,
		.offset = MTDPART_OFS_APPEND,
	},
};

static struct physmap_flash_data mtx1_flash_data = {
	.width		= 4,
	.nr_parts	= 4,
	.parts		= mtx1_mtd_partitions,
};

static struct resource mtx1_mtd_resource = {
	.start	= 0x1e000000,
	.end	= 0x1fffffff,
	.flags	= IORESOURCE_MEM,
};

static struct platform_device mtx1_mtd = {
	.name		= "physmap-flash",
	.dev		= {
		.platform_data	= &mtx1_flash_data,
	},
	.num_resources	= 1,
	.resource	= &mtx1_mtd_resource,
};

static struct resource alchemy_pci_host_res[] = {
	[0] = {
		.start	= AU1500_PCI_PHYS_ADDR,
		.end	= AU1500_PCI_PHYS_ADDR + 0xfff,
		.flags	= IORESOURCE_MEM,
	},
};

static int mtx1_pci_idsel(unsigned int devsel, int assert)
{
	/* This function is only necessary to support a proprietary Cardbus
	 * adapter on the mtx-1 "singleboard" variant. It triggers a custom
	 * logic chip connected to EXT_IO3 (GPIO1) to suppress IDSEL signals.
	 */
	udelay(1);

	if (assert && devsel != 0)
		/* Suppress signal to Cardbus */
		alchemy_gpio_set_value(1, 0);	/* set EXT_IO3 OFF */
	else
		alchemy_gpio_set_value(1, 1);	/* set EXT_IO3 ON */

	udelay(1);
	return 1;
}

static const char mtx1_irqtab[][5] = {
	[0] = { -1, AU1500_PCI_INTA, AU1500_PCI_INTA, 0xff, 0xff }, /* IDSEL 00 - AdapterA-Slot0 (top) */
	[1] = { -1, AU1500_PCI_INTB, AU1500_PCI_INTA, 0xff, 0xff }, /* IDSEL 01 - AdapterA-Slot1 (bottom) */
	[2] = { -1, AU1500_PCI_INTC, AU1500_PCI_INTD, 0xff, 0xff }, /* IDSEL 02 - AdapterB-Slot0 (top) */
	[3] = { -1, AU1500_PCI_INTD, AU1500_PCI_INTC, 0xff, 0xff }, /* IDSEL 03 - AdapterB-Slot1 (bottom) */
	[4] = { -1, AU1500_PCI_INTA, AU1500_PCI_INTB, 0xff, 0xff }, /* IDSEL 04 - AdapterC-Slot0 (top) */
	[5] = { -1, AU1500_PCI_INTB, AU1500_PCI_INTA, 0xff, 0xff }, /* IDSEL 05 - AdapterC-Slot1 (bottom) */
	[6] = { -1, AU1500_PCI_INTC, AU1500_PCI_INTD, 0xff, 0xff }, /* IDSEL 06 - AdapterD-Slot0 (top) */
	[7] = { -1, AU1500_PCI_INTD, AU1500_PCI_INTC, 0xff, 0xff }, /* IDSEL 07 - AdapterD-Slot1 (bottom) */
};

static int mtx1_map_pci_irq(const struct pci_dev *d, u8 slot, u8 pin)
{
	return mtx1_irqtab[slot][pin];
}

static struct alchemy_pci_platdata mtx1_pci_pd = {
	.board_map_irq	 = mtx1_map_pci_irq,
	.board_pci_idsel = mtx1_pci_idsel,
	.pci_cfg_set	 = PCI_CONFIG_AEN | PCI_CONFIG_R2H | PCI_CONFIG_R1H |
			   PCI_CONFIG_CH |
#if defined(__MIPSEB__)
			   PCI_CONFIG_SIC_HWA_DAT | PCI_CONFIG_SM,
#else
			   0,
#endif
};

static struct platform_device mtx1_pci_host = {
	.dev.platform_data = &mtx1_pci_pd,
	.name		= "alchemy-pci",
	.id		= 0,
	.num_resources	= ARRAY_SIZE(alchemy_pci_host_res),
	.resource	= alchemy_pci_host_res,
};

static struct platform_device *mtx1_devs[] __initdata = {
	&mtx1_pci_host,
	&mtx1_gpio_leds,
	&mtx1_wdt,
	&mtx1_button,
	&mtx1_mtd,
};

static struct au1000_eth_platform_data mtx1_au1000_eth0_pdata = {
	.phy_search_highest_addr	= 1,
	.phy1_search_mac0		= 1,
};

static int __init mtx1_register_devices(void)
{
	int rc;

	irq_set_irq_type(AU1500_GPIO204_INT, IRQ_TYPE_LEVEL_HIGH);
	irq_set_irq_type(AU1500_GPIO201_INT, IRQ_TYPE_LEVEL_LOW);
	irq_set_irq_type(AU1500_GPIO202_INT, IRQ_TYPE_LEVEL_LOW);
	irq_set_irq_type(AU1500_GPIO203_INT, IRQ_TYPE_LEVEL_LOW);
	irq_set_irq_type(AU1500_GPIO205_INT, IRQ_TYPE_LEVEL_LOW);

	au1xxx_override_eth_cfg(0, &mtx1_au1000_eth0_pdata);

	rc = gpio_request(mtx1_gpio_button[0].gpio,
					mtx1_gpio_button[0].desc);
	if (rc < 0) {
		printk(KERN_INFO "mtx1: failed to request %d\n",
					mtx1_gpio_button[0].gpio);
		goto out;
	}
	gpio_direction_input(mtx1_gpio_button[0].gpio);
out:
	gpiod_add_lookup_table(&mtx1_wdt_gpio_table);
	return platform_add_devices(mtx1_devs, ARRAY_SIZE(mtx1_devs));
}
arch_initcall(mtx1_register_devices);