310 lines
6.3 KiB
C
310 lines
6.3 KiB
C
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// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* GPR board platform device registration (Au1550)
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*
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* Copyright (C) 2010 Wolfgang Grandegger <wg@denx.de>
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*/
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#include <linux/delay.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/kernel.h>
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#include <linux/platform_device.h>
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#include <linux/pm.h>
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#include <linux/mtd/partitions.h>
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#include <linux/mtd/physmap.h>
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#include <linux/leds.h>
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#include <linux/gpio.h>
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#include <linux/i2c.h>
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#include <linux/platform_data/i2c-gpio.h>
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#include <linux/gpio/machine.h>
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#include <asm/bootinfo.h>
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#include <asm/idle.h>
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#include <asm/reboot.h>
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#include <asm/setup.h>
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#include <asm/mach-au1x00/au1000.h>
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#include <asm/mach-au1x00/gpio-au1000.h>
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#include <prom.h>
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const char *get_system_type(void)
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{
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return "GPR";
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}
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void __init prom_init(void)
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{
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unsigned char *memsize_str;
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unsigned long memsize;
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prom_argc = fw_arg0;
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prom_argv = (char **)fw_arg1;
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prom_envp = (char **)fw_arg2;
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prom_init_cmdline();
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memsize_str = prom_getenv("memsize");
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if (!memsize_str || kstrtoul(memsize_str, 0, &memsize))
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memsize = 0x04000000;
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add_memory_region(0, memsize, BOOT_MEM_RAM);
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}
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void prom_putchar(char c)
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{
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alchemy_uart_putchar(AU1000_UART0_PHYS_ADDR, c);
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}
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static void gpr_reset(char *c)
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{
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/* switch System-LED to orange (red# and green# on) */
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alchemy_gpio_direction_output(4, 0);
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alchemy_gpio_direction_output(5, 0);
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/* trigger watchdog to reset board in 200ms */
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printk(KERN_EMERG "Triggering watchdog soft reset...\n");
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raw_local_irq_disable();
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alchemy_gpio_direction_output(1, 0);
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udelay(1);
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alchemy_gpio_set_value(1, 1);
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while (1)
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cpu_wait();
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}
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static void gpr_power_off(void)
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{
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while (1)
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cpu_wait();
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}
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void __init board_setup(void)
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{
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printk(KERN_INFO "Trapeze ITS GPR board\n");
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pm_power_off = gpr_power_off;
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_machine_halt = gpr_power_off;
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_machine_restart = gpr_reset;
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/* Enable UART1/3 */
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alchemy_uart_enable(AU1000_UART3_PHYS_ADDR);
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alchemy_uart_enable(AU1000_UART1_PHYS_ADDR);
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/* Take away Reset of UMTS-card */
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alchemy_gpio_direction_output(215, 1);
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}
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/*
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* Watchdog
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*/
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static struct resource gpr_wdt_resource[] = {
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[0] = {
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.start = 1,
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.end = 1,
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.name = "gpr-adm6320-wdt",
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.flags = IORESOURCE_IRQ,
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}
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};
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static struct platform_device gpr_wdt_device = {
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.name = "adm6320-wdt",
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.id = 0,
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.num_resources = ARRAY_SIZE(gpr_wdt_resource),
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.resource = gpr_wdt_resource,
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};
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/*
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* FLASH
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*
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* 0x00000000-0x00200000 : "kernel"
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* 0x00200000-0x00a00000 : "rootfs"
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* 0x01d00000-0x01f00000 : "config"
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* 0x01c00000-0x01d00000 : "yamon"
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* 0x01d00000-0x01d40000 : "yamon env vars"
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* 0x00000000-0x00a00000 : "kernel+rootfs"
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*/
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static struct mtd_partition gpr_mtd_partitions[] = {
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{
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.name = "kernel",
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.size = 0x00200000,
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.offset = 0,
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},
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{
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.name = "rootfs",
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.size = 0x00800000,
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.offset = MTDPART_OFS_APPEND,
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.mask_flags = MTD_WRITEABLE,
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},
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{
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.name = "config",
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.size = 0x00200000,
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.offset = 0x01d00000,
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},
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{
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.name = "yamon",
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.size = 0x00100000,
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.offset = 0x01c00000,
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},
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{
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.name = "yamon env vars",
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.size = 0x00040000,
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.offset = MTDPART_OFS_APPEND,
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},
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{
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.name = "kernel+rootfs",
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.size = 0x00a00000,
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.offset = 0,
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},
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};
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static struct physmap_flash_data gpr_flash_data = {
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.width = 4,
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.nr_parts = ARRAY_SIZE(gpr_mtd_partitions),
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.parts = gpr_mtd_partitions,
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};
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static struct resource gpr_mtd_resource = {
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.start = 0x1e000000,
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.end = 0x1fffffff,
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.flags = IORESOURCE_MEM,
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};
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static struct platform_device gpr_mtd_device = {
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.name = "physmap-flash",
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.dev = {
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.platform_data = &gpr_flash_data,
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},
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.num_resources = 1,
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.resource = &gpr_mtd_resource,
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};
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/*
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* LEDs
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*/
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static const struct gpio_led gpr_gpio_leds[] = {
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{ /* green */
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.name = "gpr:green",
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.gpio = 4,
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.active_low = 1,
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},
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{ /* red */
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.name = "gpr:red",
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.gpio = 5,
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.active_low = 1,
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}
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};
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static struct gpio_led_platform_data gpr_led_data = {
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.num_leds = ARRAY_SIZE(gpr_gpio_leds),
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.leds = gpr_gpio_leds,
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};
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static struct platform_device gpr_led_devices = {
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.name = "leds-gpio",
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.id = -1,
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.dev = {
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.platform_data = &gpr_led_data,
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}
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};
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/*
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* I2C
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*/
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static struct gpiod_lookup_table gpr_i2c_gpiod_table = {
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.dev_id = "i2c-gpio",
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.table = {
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/*
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* This should be on "GPIO2" which has base at 200 so
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* the global numbers 209 and 210 should correspond to
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* local offsets 9 and 10.
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*/
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GPIO_LOOKUP_IDX("alchemy-gpio2", 9, NULL, 0,
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GPIO_ACTIVE_HIGH),
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GPIO_LOOKUP_IDX("alchemy-gpio2", 10, NULL, 1,
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GPIO_ACTIVE_HIGH),
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},
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};
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static struct i2c_gpio_platform_data gpr_i2c_data = {
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/*
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* The open drain mode is hardwired somewhere or an electrical
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* property of the alchemy GPIO controller.
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*/
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.sda_is_open_drain = 1,
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.scl_is_open_drain = 1,
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.udelay = 2, /* ~100 kHz */
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.timeout = HZ,
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};
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static struct platform_device gpr_i2c_device = {
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.name = "i2c-gpio",
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.id = -1,
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.dev.platform_data = &gpr_i2c_data,
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};
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static struct i2c_board_info gpr_i2c_info[] __initdata = {
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{
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I2C_BOARD_INFO("lm83", 0x18),
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}
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};
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static struct resource alchemy_pci_host_res[] = {
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[0] = {
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.start = AU1500_PCI_PHYS_ADDR,
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.end = AU1500_PCI_PHYS_ADDR + 0xfff,
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.flags = IORESOURCE_MEM,
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},
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};
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static int gpr_map_pci_irq(const struct pci_dev *d, u8 slot, u8 pin)
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{
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if ((slot == 0) && (pin == 1))
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return AU1550_PCI_INTA;
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else if ((slot == 0) && (pin == 2))
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return AU1550_PCI_INTB;
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return 0xff;
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}
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static struct alchemy_pci_platdata gpr_pci_pd = {
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.board_map_irq = gpr_map_pci_irq,
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.pci_cfg_set = PCI_CONFIG_AEN | PCI_CONFIG_R2H | PCI_CONFIG_R1H |
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PCI_CONFIG_CH |
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#if defined(__MIPSEB__)
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PCI_CONFIG_SIC_HWA_DAT | PCI_CONFIG_SM,
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#else
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0,
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#endif
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};
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static struct platform_device gpr_pci_host_dev = {
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.dev.platform_data = &gpr_pci_pd,
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.name = "alchemy-pci",
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.id = 0,
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.num_resources = ARRAY_SIZE(alchemy_pci_host_res),
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.resource = alchemy_pci_host_res,
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};
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static struct platform_device *gpr_devices[] __initdata = {
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&gpr_wdt_device,
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&gpr_mtd_device,
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&gpr_i2c_device,
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&gpr_led_devices,
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};
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static int __init gpr_pci_init(void)
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{
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return platform_device_register(&gpr_pci_host_dev);
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}
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/* must be arch_initcall; MIPS PCI scans busses in a subsys_initcall */
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arch_initcall(gpr_pci_init);
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static int __init gpr_dev_init(void)
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{
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gpiod_add_lookup_table(&gpr_i2c_gpiod_table);
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i2c_register_board_info(0, gpr_i2c_info, ARRAY_SIZE(gpr_i2c_info));
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return platform_add_devices(gpr_devices, ARRAY_SIZE(gpr_devices));
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}
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device_initcall(gpr_dev_init);
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