/* * Copyright STMicroelectronics, 2007. * * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include <linux/types.h> #include <linux/init.h> #include <linux/device.h> #include <linux/amba/bus.h> #include <linux/platform_device.h> #include <linux/io.h> #include <linux/slab.h> #include <linux/irq.h> #include <linux/dma-mapping.h> #include <linux/platform_data/clk-nomadik.h> #include <linux/clocksource.h> #include <linux/of_irq.h> #include <linux/of_gpio.h> #include <linux/of_address.h> #include <linux/of_platform.h> #include <linux/mtd/fsmc.h> #include <linux/gpio.h> #include <linux/amba/mmci.h> #include <asm/mach/arch.h> #include <asm/mach/map.h> #include <asm/mach/time.h> #include <asm/mach-types.h> #include <asm/cacheflush.h> #include <asm/hardware/cache-l2x0.h> /* * These are the only hard-coded address offsets we still have to use. */ #define NOMADIK_FSMC_BASE 0x10100000 /* FSMC registers */ #define NOMADIK_SDRAMC_BASE 0x10110000 /* SDRAM Controller */ #define NOMADIK_CLCDC_BASE 0x10120000 /* CLCD Controller */ #define NOMADIK_MDIF_BASE 0x10120000 /* MDIF */ #define NOMADIK_DMA0_BASE 0x10130000 /* DMA0 Controller */ #define NOMADIK_IC_BASE 0x10140000 /* Vectored Irq Controller */ #define NOMADIK_DMA1_BASE 0x10150000 /* DMA1 Controller */ #define NOMADIK_USB_BASE 0x10170000 /* USB-OTG conf reg base */ #define NOMADIK_CRYP_BASE 0x10180000 /* Crypto processor */ #define NOMADIK_SHA1_BASE 0x10190000 /* SHA-1 Processor */ #define NOMADIK_XTI_BASE 0x101A0000 /* XTI */ #define NOMADIK_RNG_BASE 0x101B0000 /* Random number generator */ #define NOMADIK_SRC_BASE 0x101E0000 /* SRC base */ #define NOMADIK_WDOG_BASE 0x101E1000 /* Watchdog */ #define NOMADIK_MTU0_BASE 0x101E2000 /* Multiple Timer 0 */ #define NOMADIK_MTU1_BASE 0x101E3000 /* Multiple Timer 1 */ #define NOMADIK_GPIO0_BASE 0x101E4000 /* GPIO0 */ #define NOMADIK_GPIO1_BASE 0x101E5000 /* GPIO1 */ #define NOMADIK_GPIO2_BASE 0x101E6000 /* GPIO2 */ #define NOMADIK_GPIO3_BASE 0x101E7000 /* GPIO3 */ #define NOMADIK_RTC_BASE 0x101E8000 /* Real Time Clock base */ #define NOMADIK_PMU_BASE 0x101E9000 /* Power Management Unit */ #define NOMADIK_OWM_BASE 0x101EA000 /* One wire master */ #define NOMADIK_SCR_BASE 0x101EF000 /* Secure Control registers */ #define NOMADIK_MSP2_BASE 0x101F0000 /* MSP 2 interface */ #define NOMADIK_MSP1_BASE 0x101F1000 /* MSP 1 interface */ #define NOMADIK_UART2_BASE 0x101F2000 /* UART 2 interface */ #define NOMADIK_SSIRx_BASE 0x101F3000 /* SSI 8-ch rx interface */ #define NOMADIK_SSITx_BASE 0x101F4000 /* SSI 8-ch tx interface */ #define NOMADIK_MSHC_BASE 0x101F5000 /* Memory Stick(Pro) Host */ #define NOMADIK_SDI_BASE 0x101F6000 /* SD-card/MM-Card */ #define NOMADIK_I2C1_BASE 0x101F7000 /* I2C1 interface */ #define NOMADIK_I2C0_BASE 0x101F8000 /* I2C0 interface */ #define NOMADIK_MSP0_BASE 0x101F9000 /* MSP 0 interface */ #define NOMADIK_FIRDA_BASE 0x101FA000 /* FIrDA interface */ #define NOMADIK_UART1_BASE 0x101FB000 /* UART 1 interface */ #define NOMADIK_SSP_BASE 0x101FC000 /* SSP interface */ #define NOMADIK_UART0_BASE 0x101FD000 /* UART 0 interface */ #define NOMADIK_SGA_BASE 0x101FE000 /* SGA interface */ #define NOMADIK_L2CC_BASE 0x10210000 /* L2 Cache controller */ #define NOMADIK_UART1_VBASE 0xF01FB000 /* This is needed for LL-debug/earlyprintk/debug-macro.S */ static struct map_desc cpu8815_io_desc[] __initdata = { { .virtual = NOMADIK_UART1_VBASE, .pfn = __phys_to_pfn(NOMADIK_UART1_BASE), .length = SZ_4K, .type = MT_DEVICE, }, }; static void __init cpu8815_map_io(void) { iotable_init(cpu8815_io_desc, ARRAY_SIZE(cpu8815_io_desc)); } static void cpu8815_restart(char mode, const char *cmd) { void __iomem *srcbase = ioremap(NOMADIK_SRC_BASE, SZ_4K); /* FIXME: use egpio when implemented */ /* Write anything to Reset status register */ writel(1, srcbase + 0x18); } /* Initial value for SRC control register: all timers use MXTAL/8 source */ #define SRC_CR_INIT_MASK 0x00007fff #define SRC_CR_INIT_VAL 0x2aaa8000 static void __init cpu8815_timer_init_of(void) { struct device_node *mtu; void __iomem *base; int irq; u32 src_cr; /* We need this to be up now */ nomadik_clk_init(); mtu = of_find_node_by_path("/mtu@101e2000"); if (!mtu) return; base = of_iomap(mtu, 0); if (WARN_ON(!base)) return; irq = irq_of_parse_and_map(mtu, 0); pr_info("Remapped MTU @ %p, irq: %d\n", base, irq); /* Configure timer sources in "system reset controller" ctrl reg */ src_cr = readl(base); src_cr &= SRC_CR_INIT_MASK; src_cr |= SRC_CR_INIT_VAL; writel(src_cr, base); clocksource_of_init(); } static struct fsmc_nand_timings cpu8815_nand_timings = { .thiz = 0, .thold = 0x10, .twait = 0x0A, .tset = 0, }; static struct fsmc_nand_platform_data cpu8815_nand_data = { .nand_timings = &cpu8815_nand_timings, }; /* * The SMSC911x IRQ is connected to a GPIO pin, but the driver expects * to simply request an IRQ passed as a resource. So the GPIO pin needs * to be requested by this hog and set as input. */ static int __init cpu8815_eth_init(void) { struct device_node *eth; int gpio, irq, err; eth = of_find_node_by_path("/usb-s8815/ethernet-gpio"); if (!eth) { pr_info("could not find any ethernet GPIO\n"); return 0; } gpio = of_get_gpio(eth, 0); err = gpio_request(gpio, "eth_irq"); if (err) { pr_info("failed to request ethernet GPIO\n"); return -ENODEV; } err = gpio_direction_input(gpio); if (err) { pr_info("failed to set ethernet GPIO as input\n"); return -ENODEV; } irq = gpio_to_irq(gpio); pr_info("enabled USB-S8815 ethernet GPIO %d, IRQ %d\n", gpio, irq); return 0; } device_initcall(cpu8815_eth_init); /* * TODO: * cannot be set from device tree, convert to a proper DT * binding. */ static struct mmci_platform_data mmcsd_plat_data = { .ocr_mask = MMC_VDD_29_30, }; /* * This GPIO pin turns on a line that is used to detect card insertion * on this board. */ static int __init cpu8815_mmcsd_init(void) { struct device_node *cdbias; int gpio, err; cdbias = of_find_node_by_path("/usb-s8815/mmcsd-gpio"); if (!cdbias) { pr_info("could not find MMC/SD card detect bias node\n"); return 0; } gpio = of_get_gpio(cdbias, 0); if (gpio < 0) { pr_info("could not obtain MMC/SD card detect bias GPIO\n"); return 0; } err = gpio_request(gpio, "card detect bias"); if (err) { pr_info("failed to request card detect bias GPIO %d\n", gpio); return -ENODEV; } err = gpio_direction_output(gpio, 0); if (err){ pr_info("failed to set GPIO %d as output, low\n", gpio); return err; } pr_info("enabled USB-S8815 CD bias GPIO %d, low\n", gpio); return 0; } device_initcall(cpu8815_mmcsd_init); /* These are mostly to get the right device names for the clock lookups */ static struct of_dev_auxdata cpu8815_auxdata_lookup[] __initdata = { OF_DEV_AUXDATA("stericsson,fsmc-nand", NOMADIK_FSMC_BASE, NULL, &cpu8815_nand_data), OF_DEV_AUXDATA("arm,primecell", NOMADIK_SDI_BASE, NULL, &mmcsd_plat_data), { /* sentinel */ }, }; static void __init cpu8815_init_of(void) { #ifdef CONFIG_CACHE_L2X0 /* At full speed latency must be >=2, so 0x249 in low bits */ l2x0_of_init(0x00730249, 0xfe000fff); #endif of_platform_populate(NULL, of_default_bus_match_table, cpu8815_auxdata_lookup, NULL); } static const char * cpu8815_board_compat[] = { "calaosystems,usb-s8815", NULL, }; DT_MACHINE_START(NOMADIK_DT, "Nomadik STn8815") .map_io = cpu8815_map_io, .init_time = cpu8815_timer_init_of, .init_machine = cpu8815_init_of, .restart = cpu8815_restart, .dt_compat = cpu8815_board_compat, MACHINE_END