/* * * 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 /* * 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)); } /* * 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 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), }; 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); } } /* 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); } /* These are mostly to get the right device names for the clock lookups */ static struct of_dev_auxdata u300_auxdata_lookup[] __initdata = { OF_DEV_AUXDATA("stericsson,pinctrl-u300", U300_SYSCON_BASE, "pinctrl-u300", NULL), OF_DEV_AUXDATA("stericsson,gpio-coh901", U300_GPIO_BASE, "u300-gpio", &u300_gpio_plat), OF_DEV_AUXDATA("stericsson,coh901327", U300_WDOG_BASE, "coh901327_wdog", NULL), OF_DEV_AUXDATA("stericsson,coh901331", U300_RTC_BASE, "rtc-coh901331", NULL), OF_DEV_AUXDATA("stericsson,coh901318", U300_DMAC_BASE, "coh901318", NULL), OF_DEV_AUXDATA("stericsson,fsmc-nand", U300_NAND_IF_PHYS_BASE, "fsmc-nand", NULL), OF_DEV_AUXDATA("arm,primecell", U300_UART0_BASE, "uart0", NULL), OF_DEV_AUXDATA("arm,primecell", U300_UART1_BASE, "uart1", NULL), OF_DEV_AUXDATA("arm,primecell", U300_SPI_BASE, "pl022", NULL), OF_DEV_AUXDATA("st,ddci2c", U300_I2C0_BASE, "stu300.0", NULL), OF_DEV_AUXDATA("st,ddci2c", U300_I2C1_BASE, "stu300.1", NULL), OF_DEV_AUXDATA("arm,primecell", U300_MMCSD_BASE, "mmci", NULL), { /* sentinel */ }, }; static void __init u300_init_irq_dt(void) { struct clk *clk; /* 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); irqchip_init(); } static void __init u300_init_machine_dt(void) { u16 val; /* Check what platform we run and print some status information */ u300_init_check_chip(); /* Initialize pinmuxing */ pinctrl_register_mappings(u300_pinmux_map, ARRAY_SIZE(u300_pinmux_map)); of_platform_populate(NULL, of_default_bus_match_table, u300_auxdata_lookup, NULL); /* 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); } static const char * u300_board_compat[] = { "stericsson,u300", NULL, }; DT_MACHINE_START(U300_DT, "U300 S335/B335 (Device Tree)") .map_io = u300_map_io, .init_irq = u300_init_irq_dt, .init_time = clocksource_of_init, .init_machine = u300_init_machine_dt, .restart = u300_restart, .dt_compat = u300_board_compat, MACHINE_END