// SPDX-License-Identifier: GPL-2.0 /* * linux/arch/arm/mach-sa1100/simpad.c */ #include <linux/module.h> #include <linux/gpio/machine.h> #include <linux/init.h> #include <linux/kernel.h> #include <linux/tty.h> #include <linux/proc_fs.h> #include <linux/string.h> #include <linux/pm.h> #include <linux/platform_data/sa11x0-serial.h> #include <linux/platform_device.h> #include <linux/mfd/ucb1x00.h> #include <linux/mtd/mtd.h> #include <linux/mtd/partitions.h> #include <linux/io.h> #include <linux/gpio/driver.h> #include <mach/hardware.h> #include <asm/setup.h> #include <asm/irq.h> #include <asm/mach-types.h> #include <asm/mach/arch.h> #include <asm/mach/flash.h> #include <asm/mach/map.h> #include <linux/platform_data/mfd-mcp-sa11x0.h> #include <mach/simpad.h> #include <mach/irqs.h> #include <linux/serial_core.h> #include <linux/ioport.h> #include <linux/input.h> #include <linux/gpio_keys.h> #include <linux/leds.h> #include <linux/platform_data/i2c-gpio.h> #include "generic.h" /* * CS3 support */ static long cs3_shadow; static spinlock_t cs3_lock; static struct gpio_chip cs3_gpio; long simpad_get_cs3_ro(void) { return readl(CS3_BASE); } EXPORT_SYMBOL(simpad_get_cs3_ro); long simpad_get_cs3_shadow(void) { return cs3_shadow; } EXPORT_SYMBOL(simpad_get_cs3_shadow); static void __simpad_write_cs3(void) { writel(cs3_shadow, CS3_BASE); } void simpad_set_cs3_bit(int value) { unsigned long flags; spin_lock_irqsave(&cs3_lock, flags); cs3_shadow |= value; __simpad_write_cs3(); spin_unlock_irqrestore(&cs3_lock, flags); } EXPORT_SYMBOL(simpad_set_cs3_bit); void simpad_clear_cs3_bit(int value) { unsigned long flags; spin_lock_irqsave(&cs3_lock, flags); cs3_shadow &= ~value; __simpad_write_cs3(); spin_unlock_irqrestore(&cs3_lock, flags); } EXPORT_SYMBOL(simpad_clear_cs3_bit); static void cs3_gpio_set(struct gpio_chip *chip, unsigned offset, int value) { if (offset > 15) return; if (value) simpad_set_cs3_bit(1 << offset); else simpad_clear_cs3_bit(1 << offset); }; static int cs3_gpio_get(struct gpio_chip *chip, unsigned offset) { if (offset > 15) return !!(simpad_get_cs3_ro() & (1 << (offset - 16))); return !!(simpad_get_cs3_shadow() & (1 << offset)); }; static int cs3_gpio_direction_input(struct gpio_chip *chip, unsigned offset) { if (offset > 15) return 0; return -EINVAL; }; static int cs3_gpio_direction_output(struct gpio_chip *chip, unsigned offset, int value) { if (offset > 15) return -EINVAL; cs3_gpio_set(chip, offset, value); return 0; }; static struct map_desc simpad_io_desc[] __initdata = { { /* MQ200 */ .virtual = 0xf2800000, .pfn = __phys_to_pfn(0x4b800000), .length = 0x00800000, .type = MT_DEVICE }, { /* Simpad CS3 */ .virtual = (unsigned long)CS3_BASE, .pfn = __phys_to_pfn(SA1100_CS3_PHYS), .length = 0x00100000, .type = MT_DEVICE }, }; static void simpad_uart_pm(struct uart_port *port, u_int state, u_int oldstate) { if (port->mapbase == (u_int)&Ser1UTCR0) { if (state) { simpad_clear_cs3_bit(RS232_ON); simpad_clear_cs3_bit(DECT_POWER_ON); }else { simpad_set_cs3_bit(RS232_ON); simpad_set_cs3_bit(DECT_POWER_ON); } } } static struct sa1100_port_fns simpad_port_fns __initdata = { .pm = simpad_uart_pm, }; static struct mtd_partition simpad_partitions[] = { { .name = "SIMpad boot firmware", .size = 0x00080000, .offset = 0, .mask_flags = MTD_WRITEABLE, }, { .name = "SIMpad kernel", .size = 0x0010000, .offset = MTDPART_OFS_APPEND, }, { .name = "SIMpad root jffs2", .size = MTDPART_SIZ_FULL, .offset = MTDPART_OFS_APPEND, } }; static struct flash_platform_data simpad_flash_data = { .map_name = "cfi_probe", .parts = simpad_partitions, .nr_parts = ARRAY_SIZE(simpad_partitions), }; static struct resource simpad_flash_resources [] = { DEFINE_RES_MEM(SA1100_CS0_PHYS, SZ_16M), DEFINE_RES_MEM(SA1100_CS1_PHYS, SZ_16M), }; static struct ucb1x00_plat_data simpad_ucb1x00_data = { .gpio_base = SIMPAD_UCB1X00_GPIO_BASE, }; static struct mcp_plat_data simpad_mcp_data = { .mccr0 = MCCR0_ADM, .sclk_rate = 11981000, .codec_pdata = &simpad_ucb1x00_data, }; static void __init simpad_map_io(void) { sa1100_map_io(); iotable_init(simpad_io_desc, ARRAY_SIZE(simpad_io_desc)); /* Initialize CS3 */ cs3_shadow = (EN1 | EN0 | LED2_ON | DISPLAY_ON | RS232_ON | ENABLE_5V | RESET_SIMCARD | DECT_POWER_ON); __simpad_write_cs3(); /* Spinlocks not yet initialized */ sa1100_register_uart_fns(&simpad_port_fns); sa1100_register_uart(0, 3); /* serial interface */ sa1100_register_uart(1, 1); /* DECT */ // Reassign UART 1 pins GAFR |= GPIO_UART_TXD | GPIO_UART_RXD; GPDR |= GPIO_UART_TXD | GPIO_LDD13 | GPIO_LDD15; GPDR &= ~GPIO_UART_RXD; PPAR |= PPAR_UPR; /* * Set up registers for sleep mode. */ PWER = PWER_GPIO0| PWER_RTC; PGSR = 0x818; PCFR = 0; PSDR = 0; } static void simpad_power_off(void) { local_irq_disable(); cs3_shadow = SD_MEDIAQ; __simpad_write_cs3(); /* Bypass spinlock here */ /* disable internal oscillator, float CS lines */ PCFR = (PCFR_OPDE | PCFR_FP | PCFR_FS); /* enable wake-up on GPIO0 */ PWER = GFER = GRER = PWER_GPIO0; /* * set scratchpad to zero, just in case it is used as a * restart address by the bootloader. */ PSPR = 0; PGSR = 0; /* enter sleep mode */ PMCR = PMCR_SF; while(1); local_irq_enable(); /* we won't ever call it */ } /* * gpio_keys */ static struct gpio_keys_button simpad_button_table[] = { { KEY_POWER, IRQ_GPIO_POWER_BUTTON, 1, "power button" }, }; static struct gpio_keys_platform_data simpad_keys_data = { .buttons = simpad_button_table, .nbuttons = ARRAY_SIZE(simpad_button_table), }; static struct platform_device simpad_keys = { .name = "gpio-keys", .dev = { .platform_data = &simpad_keys_data, }, }; static struct gpio_keys_button simpad_polled_button_table[] = { { KEY_PROG1, SIMPAD_UCB1X00_GPIO_PROG1, 1, "prog1 button" }, { KEY_PROG2, SIMPAD_UCB1X00_GPIO_PROG2, 1, "prog2 button" }, { KEY_UP, SIMPAD_UCB1X00_GPIO_UP, 1, "up button" }, { KEY_DOWN, SIMPAD_UCB1X00_GPIO_DOWN, 1, "down button" }, { KEY_LEFT, SIMPAD_UCB1X00_GPIO_LEFT, 1, "left button" }, { KEY_RIGHT, SIMPAD_UCB1X00_GPIO_RIGHT, 1, "right button" }, }; static struct gpio_keys_platform_data simpad_polled_keys_data = { .buttons = simpad_polled_button_table, .nbuttons = ARRAY_SIZE(simpad_polled_button_table), .poll_interval = 50, }; static struct platform_device simpad_polled_keys = { .name = "gpio-keys-polled", .dev = { .platform_data = &simpad_polled_keys_data, }, }; /* * GPIO LEDs */ static struct gpio_led simpad_leds[] = { { .name = "simpad:power", .gpio = SIMPAD_CS3_LED2_ON, .active_low = 0, .default_trigger = "default-on", }, }; static struct gpio_led_platform_data simpad_led_data = { .num_leds = ARRAY_SIZE(simpad_leds), .leds = simpad_leds, }; static struct platform_device simpad_gpio_leds = { .name = "leds-gpio", .id = 0, .dev = { .platform_data = &simpad_led_data, }, }; /* * i2c */ static struct gpiod_lookup_table simpad_i2c_gpiod_table = { .dev_id = "i2c-gpio.0", .table = { GPIO_LOOKUP_IDX("gpio", 21, NULL, 0, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN), GPIO_LOOKUP_IDX("gpio", 25, NULL, 1, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN), }, }; static struct i2c_gpio_platform_data simpad_i2c_data = { .udelay = 10, .timeout = HZ, }; static struct platform_device simpad_i2c = { .name = "i2c-gpio", .id = 0, .dev = { .platform_data = &simpad_i2c_data, }, }; /* * MediaQ Video Device */ static struct platform_device simpad_mq200fb = { .name = "simpad-mq200", .id = 0, }; static struct platform_device *devices[] __initdata = { &simpad_keys, &simpad_polled_keys, &simpad_mq200fb, &simpad_gpio_leds, &simpad_i2c, }; /* Compact Flash */ static struct gpiod_lookup_table simpad_cf_gpio_table = { .dev_id = "sa11x0-pcmcia", .table = { GPIO_LOOKUP("gpio", GPIO_CF_IRQ, "cf-ready", GPIO_ACTIVE_HIGH), GPIO_LOOKUP("gpio", GPIO_CF_CD, "cf-detect", GPIO_ACTIVE_HIGH), { }, }, }; static int __init simpad_init(void) { int ret; spin_lock_init(&cs3_lock); cs3_gpio.label = "simpad_cs3"; cs3_gpio.base = SIMPAD_CS3_GPIO_BASE; cs3_gpio.ngpio = 24; cs3_gpio.set = cs3_gpio_set; cs3_gpio.get = cs3_gpio_get; cs3_gpio.direction_input = cs3_gpio_direction_input; cs3_gpio.direction_output = cs3_gpio_direction_output; ret = gpiochip_add_data(&cs3_gpio, NULL); if (ret) printk(KERN_WARNING "simpad: Unable to register cs3 GPIO device"); pm_power_off = simpad_power_off; sa11x0_register_pcmcia(-1, &simpad_cf_gpio_table); sa11x0_ppc_configure_mcp(); sa11x0_register_mtd(&simpad_flash_data, simpad_flash_resources, ARRAY_SIZE(simpad_flash_resources)); sa11x0_register_mcp(&simpad_mcp_data); gpiod_add_lookup_table(&simpad_i2c_gpiod_table); ret = platform_add_devices(devices, ARRAY_SIZE(devices)); if(ret) printk(KERN_WARNING "simpad: Unable to register mq200 framebuffer device"); return 0; } arch_initcall(simpad_init); MACHINE_START(SIMPAD, "Simpad") /* Maintainer: Holger Freyther */ .atag_offset = 0x100, .map_io = simpad_map_io, .nr_irqs = SA1100_NR_IRQS, .init_irq = sa1100_init_irq, .init_late = sa11x0_init_late, .init_time = sa1100_timer_init, .restart = sa11x0_restart, MACHINE_END