/* * * arch/arm/mach-u300/core.c * * * Copyright (C) 2007-2012 ST-Ericsson SA * License terms: GNU General Public License (GPL) version 2 * Core platform support, IRQ handling and device definitions. * Author: Linus Walleij */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "timer.h" #include "spi.h" #include "i2c.h" #include "u300-gpio.h" /* * Static I/O mappings that are needed for booting the U300 platforms. The * only things we need are the areas where we find the timer, syscon and * intcon, since the remaining device drivers will map their own memory * physical to virtual as the need arise. */ static struct map_desc u300_io_desc[] __initdata = { { .virtual = U300_SLOW_PER_VIRT_BASE, .pfn = __phys_to_pfn(U300_SLOW_PER_PHYS_BASE), .length = SZ_64K, .type = MT_DEVICE, }, { .virtual = U300_AHB_PER_VIRT_BASE, .pfn = __phys_to_pfn(U300_AHB_PER_PHYS_BASE), .length = SZ_32K, .type = MT_DEVICE, }, { .virtual = U300_FAST_PER_VIRT_BASE, .pfn = __phys_to_pfn(U300_FAST_PER_PHYS_BASE), .length = SZ_32K, .type = MT_DEVICE, }, }; static void __init u300_map_io(void) { iotable_init(u300_io_desc, ARRAY_SIZE(u300_io_desc)); } /* * Declaration of devices found on the U300 board and * their respective memory locations. */ static struct amba_pl011_data uart0_plat_data = { #ifdef CONFIG_COH901318 .dma_filter = coh901318_filter_id, .dma_rx_param = (void *) U300_DMA_UART0_RX, .dma_tx_param = (void *) U300_DMA_UART0_TX, #endif }; /* Slow device at 0x3000 offset */ static AMBA_APB_DEVICE(uart0, "uart0", 0, U300_UART0_BASE, { IRQ_U300_UART0 }, &uart0_plat_data); /* The U335 have an additional UART1 on the APP CPU */ static struct amba_pl011_data uart1_plat_data = { #ifdef CONFIG_COH901318 .dma_filter = coh901318_filter_id, .dma_rx_param = (void *) U300_DMA_UART1_RX, .dma_tx_param = (void *) U300_DMA_UART1_TX, #endif }; /* Fast device at 0x7000 offset */ static AMBA_APB_DEVICE(uart1, "uart1", 0, U300_UART1_BASE, { IRQ_U300_UART1 }, &uart1_plat_data); /* AHB device at 0x4000 offset */ static AMBA_APB_DEVICE(pl172, "pl172", 0, U300_EMIF_CFG_BASE, { }, NULL); /* Fast device at 0x6000 offset */ static AMBA_APB_DEVICE(pl022, "pl022", 0, U300_SPI_BASE, { IRQ_U300_SPI }, NULL); /* Fast device at 0x1000 offset */ #define U300_MMCSD_IRQS { IRQ_U300_MMCSD_MCIINTR0, IRQ_U300_MMCSD_MCIINTR1 } static struct mmci_platform_data mmcsd_platform_data = { /* * Do not set ocr_mask or voltage translation function, * we have a regulator we can control instead. */ .f_max = 24000000, .gpio_wp = -1, .gpio_cd = U300_GPIO_PIN_MMC_CD, .cd_invert = true, .capabilities = MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED | MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA, #ifdef CONFIG_COH901318 .dma_filter = coh901318_filter_id, .dma_rx_param = (void *) U300_DMA_MMCSD_RX_TX, /* Don't specify a TX channel, this RX channel is bidirectional */ #endif }; static AMBA_APB_DEVICE(mmcsd, "mmci", 0, U300_MMCSD_BASE, U300_MMCSD_IRQS, &mmcsd_platform_data); /* * The order of device declaration may be important, since some devices * have dependencies on other devices being initialized first. */ static struct amba_device *amba_devs[] __initdata = { &uart0_device, &uart1_device, &pl022_device, &pl172_device, &mmcsd_device, }; /* Here follows a list of all hw resources that the platform devices * allocate. Note, clock dependencies are not included */ static struct resource gpio_resources[] = { { .start = U300_GPIO_BASE, .end = (U300_GPIO_BASE + SZ_4K - 1), .flags = IORESOURCE_MEM, }, { .name = "gpio0", .start = IRQ_U300_GPIO_PORT0, .end = IRQ_U300_GPIO_PORT0, .flags = IORESOURCE_IRQ, }, { .name = "gpio1", .start = IRQ_U300_GPIO_PORT1, .end = IRQ_U300_GPIO_PORT1, .flags = IORESOURCE_IRQ, }, { .name = "gpio2", .start = IRQ_U300_GPIO_PORT2, .end = IRQ_U300_GPIO_PORT2, .flags = IORESOURCE_IRQ, }, { .name = "gpio3", .start = IRQ_U300_GPIO_PORT3, .end = IRQ_U300_GPIO_PORT3, .flags = IORESOURCE_IRQ, }, { .name = "gpio4", .start = IRQ_U300_GPIO_PORT4, .end = IRQ_U300_GPIO_PORT4, .flags = IORESOURCE_IRQ, }, { .name = "gpio5", .start = IRQ_U300_GPIO_PORT5, .end = IRQ_U300_GPIO_PORT5, .flags = IORESOURCE_IRQ, }, { .name = "gpio6", .start = IRQ_U300_GPIO_PORT6, .end = IRQ_U300_GPIO_PORT6, .flags = IORESOURCE_IRQ, }, }; static struct resource keypad_resources[] = { { .start = U300_KEYPAD_BASE, .end = U300_KEYPAD_BASE + SZ_4K - 1, .flags = IORESOURCE_MEM, }, { .name = "coh901461-press", .start = IRQ_U300_KEYPAD_KEYBF, .end = IRQ_U300_KEYPAD_KEYBF, .flags = IORESOURCE_IRQ, }, { .name = "coh901461-release", .start = IRQ_U300_KEYPAD_KEYBR, .end = IRQ_U300_KEYPAD_KEYBR, .flags = IORESOURCE_IRQ, }, }; static struct resource rtc_resources[] = { { .start = U300_RTC_BASE, .end = U300_RTC_BASE + SZ_4K - 1, .flags = IORESOURCE_MEM, }, { .start = IRQ_U300_RTC, .end = IRQ_U300_RTC, .flags = IORESOURCE_IRQ, }, }; /* * Fsmc does have IRQs: #43 and #44 (NFIF and NFIF2) * but these are not yet used by the driver. */ static struct resource fsmc_resources[] = { { .name = "nand_addr", .start = U300_NAND_CS0_PHYS_BASE + PLAT_NAND_ALE, .end = U300_NAND_CS0_PHYS_BASE + PLAT_NAND_ALE + SZ_16K - 1, .flags = IORESOURCE_MEM, }, { .name = "nand_cmd", .start = U300_NAND_CS0_PHYS_BASE + PLAT_NAND_CLE, .end = U300_NAND_CS0_PHYS_BASE + PLAT_NAND_CLE + SZ_16K - 1, .flags = IORESOURCE_MEM, }, { .name = "nand_data", .start = U300_NAND_CS0_PHYS_BASE, .end = U300_NAND_CS0_PHYS_BASE + SZ_16K - 1, .flags = IORESOURCE_MEM, }, { .name = "fsmc_regs", .start = U300_NAND_IF_PHYS_BASE, .end = U300_NAND_IF_PHYS_BASE + SZ_4K - 1, .flags = IORESOURCE_MEM, }, }; static struct resource i2c0_resources[] = { { .start = U300_I2C0_BASE, .end = U300_I2C0_BASE + SZ_4K - 1, .flags = IORESOURCE_MEM, }, { .start = IRQ_U300_I2C0, .end = IRQ_U300_I2C0, .flags = IORESOURCE_IRQ, }, }; static struct resource i2c1_resources[] = { { .start = U300_I2C1_BASE, .end = U300_I2C1_BASE + SZ_4K - 1, .flags = IORESOURCE_MEM, }, { .start = IRQ_U300_I2C1, .end = IRQ_U300_I2C1, .flags = IORESOURCE_IRQ, }, }; static struct resource wdog_resources[] = { { .start = U300_WDOG_BASE, .end = U300_WDOG_BASE + SZ_4K - 1, .flags = IORESOURCE_MEM, }, { .start = IRQ_U300_WDOG, .end = IRQ_U300_WDOG, .flags = IORESOURCE_IRQ, } }; static struct resource dma_resource[] = { { .start = U300_DMAC_BASE, .end = U300_DMAC_BASE + PAGE_SIZE - 1, .flags = IORESOURCE_MEM, }, { .start = IRQ_U300_DMA, .end = IRQ_U300_DMA, .flags = IORESOURCE_IRQ, } }; static struct resource pinctrl_resources[] = { { .start = U300_SYSCON_BASE, .end = U300_SYSCON_BASE + SZ_4K - 1, .flags = IORESOURCE_MEM, }, }; static struct platform_device wdog_device = { .name = "coh901327_wdog", .id = -1, .num_resources = ARRAY_SIZE(wdog_resources), .resource = wdog_resources, }; static struct platform_device i2c0_device = { .name = "stu300", .id = 0, .num_resources = ARRAY_SIZE(i2c0_resources), .resource = i2c0_resources, }; static struct platform_device i2c1_device = { .name = "stu300", .id = 1, .num_resources = ARRAY_SIZE(i2c1_resources), .resource = i2c1_resources, }; static struct platform_device pinctrl_device = { .name = "pinctrl-u300", .id = -1, .num_resources = ARRAY_SIZE(pinctrl_resources), .resource = pinctrl_resources, }; /* * The different variants have a few different versions of the * GPIO block, with different number of ports. */ static struct u300_gpio_platform u300_gpio_plat = { .ports = 7, .gpio_base = 0, }; static struct platform_device gpio_device = { .name = "u300-gpio", .id = -1, .num_resources = ARRAY_SIZE(gpio_resources), .resource = gpio_resources, .dev = { .platform_data = &u300_gpio_plat, }, }; static struct platform_device keypad_device = { .name = "keypad", .id = -1, .num_resources = ARRAY_SIZE(keypad_resources), .resource = keypad_resources, }; static struct platform_device rtc_device = { .name = "rtc-coh901331", .id = -1, .num_resources = ARRAY_SIZE(rtc_resources), .resource = rtc_resources, }; static struct mtd_partition u300_partitions[] = { { .name = "bootrecords", .offset = 0, .size = SZ_128K, }, { .name = "free", .offset = SZ_128K, .size = 8064 * SZ_1K, }, { .name = "platform", .offset = 8192 * SZ_1K, .size = 253952 * SZ_1K, }, }; static struct fsmc_nand_platform_data nand_platform_data = { .partitions = u300_partitions, .nr_partitions = ARRAY_SIZE(u300_partitions), .options = NAND_SKIP_BBTSCAN, .width = FSMC_NAND_BW8, }; static struct platform_device nand_device = { .name = "fsmc-nand", .id = -1, .resource = fsmc_resources, .num_resources = ARRAY_SIZE(fsmc_resources), .dev = { .platform_data = &nand_platform_data, }, }; static struct platform_device dma_device = { .name = "coh901318", .id = -1, .resource = dma_resource, .num_resources = ARRAY_SIZE(dma_resource), .dev = { .coherent_dma_mask = ~0, }, }; static unsigned long pin_pullup_conf[] = { PIN_CONF_PACKED(PIN_CONFIG_BIAS_PULL_UP, 1), }; static unsigned long pin_highz_conf[] = { PIN_CONF_PACKED(PIN_CONFIG_BIAS_HIGH_IMPEDANCE, 0), }; /* Pin control settings */ static struct pinctrl_map __initdata u300_pinmux_map[] = { /* anonymous maps for chip power and EMIFs */ PIN_MAP_MUX_GROUP_HOG_DEFAULT("pinctrl-u300", NULL, "power"), PIN_MAP_MUX_GROUP_HOG_DEFAULT("pinctrl-u300", NULL, "emif0"), PIN_MAP_MUX_GROUP_HOG_DEFAULT("pinctrl-u300", NULL, "emif1"), /* per-device maps for MMC/SD, SPI and UART */ PIN_MAP_MUX_GROUP_DEFAULT("mmci", "pinctrl-u300", NULL, "mmc0"), PIN_MAP_MUX_GROUP_DEFAULT("pl022", "pinctrl-u300", NULL, "spi0"), PIN_MAP_MUX_GROUP_DEFAULT("uart0", "pinctrl-u300", NULL, "uart0"), /* This pin is used for clock return rather than GPIO */ PIN_MAP_CONFIGS_PIN_DEFAULT("mmci", "pinctrl-u300", "PIO APP GPIO 11", pin_pullup_conf), /* This pin is used for card detect */ PIN_MAP_CONFIGS_PIN_DEFAULT("mmci", "pinctrl-u300", "PIO MS INS", pin_highz_conf), }; /* * Notice that AMBA devices are initialized before platform devices. * */ static struct platform_device *platform_devs[] __initdata = { &dma_device, &i2c0_device, &i2c1_device, &keypad_device, &rtc_device, &pinctrl_device, &gpio_device, &nand_device, &wdog_device, }; /* * Interrupts: the U300 platforms have two pl190 ARM PrimeCells connected * together so some interrupts are connected to the first one and some * to the second one. */ static void __init u300_init_irq(void) { u32 mask[2] = {0, 0}; struct clk *clk; int i; /* initialize clocking early, we want to clock the INTCON */ u300_clk_init(U300_SYSCON_VBASE); /* Bootstrap EMIF and SEMI clocks */ clk = clk_get_sys("pl172", NULL); BUG_ON(IS_ERR(clk)); clk_prepare_enable(clk); clk = clk_get_sys("semi", NULL); BUG_ON(IS_ERR(clk)); clk_prepare_enable(clk); /* Clock the interrupt controller */ clk = clk_get_sys("intcon", NULL); BUG_ON(IS_ERR(clk)); clk_prepare_enable(clk); for (i = 0; i < U300_VIC_IRQS_END; i++) set_bit(i, (unsigned long *) &mask[0]); vic_init((void __iomem *) U300_INTCON0_VBASE, IRQ_U300_INTCON0_START, mask[0], mask[0]); vic_init((void __iomem *) U300_INTCON1_VBASE, IRQ_U300_INTCON1_START, mask[1], mask[1]); } /* * U300 platforms peripheral handling */ struct db_chip { u16 chipid; const char *name; }; /* * This is a list of the Digital Baseband chips used in the U300 platform. */ static struct db_chip db_chips[] __initdata = { { .chipid = 0xb800, .name = "DB3000", }, { .chipid = 0xc000, .name = "DB3100", }, { .chipid = 0xc800, .name = "DB3150", }, { .chipid = 0xd800, .name = "DB3200", }, { .chipid = 0xe000, .name = "DB3250", }, { .chipid = 0xe800, .name = "DB3210", }, { .chipid = 0xf000, .name = "DB3350 P1x", }, { .chipid = 0xf100, .name = "DB3350 P2x", }, { .chipid = 0x0000, /* List terminator */ .name = NULL, } }; static void __init u300_init_check_chip(void) { u16 val; struct db_chip *chip; const char *chipname; const char unknown[] = "UNKNOWN"; /* Read out and print chip ID */ val = readw(U300_SYSCON_VBASE + U300_SYSCON_CIDR); /* This is in funky bigendian order... */ val = (val & 0xFFU) << 8 | (val >> 8); chip = db_chips; chipname = unknown; for ( ; chip->chipid; chip++) { if (chip->chipid == (val & 0xFF00U)) { chipname = chip->name; break; } } printk(KERN_INFO "Initializing U300 system on %s baseband chip " \ "(chip ID 0x%04x)\n", chipname, val); if ((val & 0xFF00U) != 0xf000 && (val & 0xFF00U) != 0xf100) { printk(KERN_ERR "Platform configured for BS335 " \ " with DB3350 but %s detected, expect problems!", chipname); } } /* * Some devices and their resources require reserved physical memory from * the end of the available RAM. This function traverses the list of devices * and assigns actual addresses to these. */ static void __init u300_assign_physmem(void) { unsigned long curr_start = __pa(high_memory); int i, j; for (i = 0; i < ARRAY_SIZE(platform_devs); i++) { for (j = 0; j < platform_devs[i]->num_resources; j++) { struct resource *const res = &platform_devs[i]->resource[j]; if (IORESOURCE_MEM == res->flags && 0 == res->start) { res->start = curr_start; res->end += curr_start; curr_start += resource_size(res); printk(KERN_INFO "core.c: Mapping RAM " \ "%#x-%#x to device %s:%s\n", res->start, res->end, platform_devs[i]->name, res->name); } } } } static void __init u300_init_machine(void) { int i; u16 val; /* Check what platform we run and print some status information */ u300_init_check_chip(); /* Initialize SPI device with some board specifics */ u300_spi_init(&pl022_device); /* Register the AMBA devices in the AMBA bus abstraction layer */ for (i = 0; i < ARRAY_SIZE(amba_devs); i++) { struct amba_device *d = amba_devs[i]; amba_device_register(d, &iomem_resource); } u300_assign_physmem(); /* Initialize pinmuxing */ pinctrl_register_mappings(u300_pinmux_map, ARRAY_SIZE(u300_pinmux_map)); /* Register subdevices on the I2C buses */ u300_i2c_register_board_devices(); /* Register the platform devices */ platform_add_devices(platform_devs, ARRAY_SIZE(platform_devs)); /* Register subdevices on the SPI bus */ u300_spi_register_board_devices(); /* Enable SEMI self refresh */ val = readw(U300_SYSCON_VBASE + U300_SYSCON_SMCR) | U300_SYSCON_SMCR_SEMI_SREFREQ_ENABLE; writew(val, U300_SYSCON_VBASE + U300_SYSCON_SMCR); } /* Forward declare this function from the watchdog */ void coh901327_watchdog_reset(void); static void u300_restart(char mode, const char *cmd) { switch (mode) { case 's': case 'h': #ifdef CONFIG_COH901327_WATCHDOG coh901327_watchdog_reset(); #endif break; default: /* Do nothing */ break; } /* Wait for system do die/reset. */ while (1); } MACHINE_START(U300, "Ericsson AB U335 S335/B335 Prototype Board") /* Maintainer: Linus Walleij */ .atag_offset = 0x100, .map_io = u300_map_io, .nr_irqs = 0, .init_irq = u300_init_irq, .init_time = u300_timer_init, .init_machine = u300_init_machine, .restart = u300_restart, MACHINE_END