diff options
Diffstat (limited to 'kernel/arch/arm/mach-nomadik/cpu-8815.c')
| -rw-r--r-- | kernel/arch/arm/mach-nomadik/cpu-8815.c | 159 |
1 files changed, 159 insertions, 0 deletions
diff --git a/kernel/arch/arm/mach-nomadik/cpu-8815.c b/kernel/arch/arm/mach-nomadik/cpu-8815.c new file mode 100644 index 000000000..9bda46f1f --- /dev/null +++ b/kernel/arch/arm/mach-nomadik/cpu-8815.c @@ -0,0 +1,159 @@ +/* + * 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/of_irq.h> +#include <linux/of_gpio.h> +#include <linux/of_address.h> +#include <linux/of_platform.h> +#include <linux/gpio.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(enum reboot_mode 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); +} + +/* + * 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); + +static const char * cpu8815_board_compat[] = { + "st,nomadik-nhk-15", + "calaosystems,usb-s8815", + NULL, +}; + +DT_MACHINE_START(NOMADIK_DT, "Nomadik STn8815") + /* At full speed latency must be >=2, so 0x249 in low bits */ + .l2c_aux_val = 0x00700249, + .l2c_aux_mask = 0xfe0fefff, + .map_io = cpu8815_map_io, + .restart = cpu8815_restart, + .dt_compat = cpu8815_board_compat, +MACHINE_END |