1/* 2 * Copyright STMicroelectronics, 2007. 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License as published by 6 * the Free Software Foundation; either version 2 of the License, or 7 * (at your option) any later version. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write to the Free Software 16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 17 */ 18 19#include <linux/types.h> 20#include <linux/init.h> 21#include <linux/device.h> 22#include <linux/amba/bus.h> 23#include <linux/platform_device.h> 24#include <linux/io.h> 25#include <linux/slab.h> 26#include <linux/irq.h> 27#include <linux/dma-mapping.h> 28#include <linux/of_irq.h> 29#include <linux/of_gpio.h> 30#include <linux/of_address.h> 31#include <linux/of_platform.h> 32#include <linux/gpio.h> 33 34#include <asm/mach/arch.h> 35#include <asm/mach/map.h> 36#include <asm/mach/time.h> 37#include <asm/mach-types.h> 38 39#include <asm/cacheflush.h> 40#include <asm/hardware/cache-l2x0.h> 41 42/* 43 * These are the only hard-coded address offsets we still have to use. 44 */ 45#define NOMADIK_FSMC_BASE 0x10100000 /* FSMC registers */ 46#define NOMADIK_SDRAMC_BASE 0x10110000 /* SDRAM Controller */ 47#define NOMADIK_CLCDC_BASE 0x10120000 /* CLCD Controller */ 48#define NOMADIK_MDIF_BASE 0x10120000 /* MDIF */ 49#define NOMADIK_DMA0_BASE 0x10130000 /* DMA0 Controller */ 50#define NOMADIK_IC_BASE 0x10140000 /* Vectored Irq Controller */ 51#define NOMADIK_DMA1_BASE 0x10150000 /* DMA1 Controller */ 52#define NOMADIK_USB_BASE 0x10170000 /* USB-OTG conf reg base */ 53#define NOMADIK_CRYP_BASE 0x10180000 /* Crypto processor */ 54#define NOMADIK_SHA1_BASE 0x10190000 /* SHA-1 Processor */ 55#define NOMADIK_XTI_BASE 0x101A0000 /* XTI */ 56#define NOMADIK_RNG_BASE 0x101B0000 /* Random number generator */ 57#define NOMADIK_SRC_BASE 0x101E0000 /* SRC base */ 58#define NOMADIK_WDOG_BASE 0x101E1000 /* Watchdog */ 59#define NOMADIK_MTU0_BASE 0x101E2000 /* Multiple Timer 0 */ 60#define NOMADIK_MTU1_BASE 0x101E3000 /* Multiple Timer 1 */ 61#define NOMADIK_GPIO0_BASE 0x101E4000 /* GPIO0 */ 62#define NOMADIK_GPIO1_BASE 0x101E5000 /* GPIO1 */ 63#define NOMADIK_GPIO2_BASE 0x101E6000 /* GPIO2 */ 64#define NOMADIK_GPIO3_BASE 0x101E7000 /* GPIO3 */ 65#define NOMADIK_RTC_BASE 0x101E8000 /* Real Time Clock base */ 66#define NOMADIK_PMU_BASE 0x101E9000 /* Power Management Unit */ 67#define NOMADIK_OWM_BASE 0x101EA000 /* One wire master */ 68#define NOMADIK_SCR_BASE 0x101EF000 /* Secure Control registers */ 69#define NOMADIK_MSP2_BASE 0x101F0000 /* MSP 2 interface */ 70#define NOMADIK_MSP1_BASE 0x101F1000 /* MSP 1 interface */ 71#define NOMADIK_UART2_BASE 0x101F2000 /* UART 2 interface */ 72#define NOMADIK_SSIRx_BASE 0x101F3000 /* SSI 8-ch rx interface */ 73#define NOMADIK_SSITx_BASE 0x101F4000 /* SSI 8-ch tx interface */ 74#define NOMADIK_MSHC_BASE 0x101F5000 /* Memory Stick(Pro) Host */ 75#define NOMADIK_SDI_BASE 0x101F6000 /* SD-card/MM-Card */ 76#define NOMADIK_I2C1_BASE 0x101F7000 /* I2C1 interface */ 77#define NOMADIK_I2C0_BASE 0x101F8000 /* I2C0 interface */ 78#define NOMADIK_MSP0_BASE 0x101F9000 /* MSP 0 interface */ 79#define NOMADIK_FIRDA_BASE 0x101FA000 /* FIrDA interface */ 80#define NOMADIK_UART1_BASE 0x101FB000 /* UART 1 interface */ 81#define NOMADIK_SSP_BASE 0x101FC000 /* SSP interface */ 82#define NOMADIK_UART0_BASE 0x101FD000 /* UART 0 interface */ 83#define NOMADIK_SGA_BASE 0x101FE000 /* SGA interface */ 84#define NOMADIK_L2CC_BASE 0x10210000 /* L2 Cache controller */ 85#define NOMADIK_UART1_VBASE 0xF01FB000 86 87/* This is needed for LL-debug/earlyprintk/debug-macro.S */ 88static struct map_desc cpu8815_io_desc[] __initdata = { 89 { 90 .virtual = NOMADIK_UART1_VBASE, 91 .pfn = __phys_to_pfn(NOMADIK_UART1_BASE), 92 .length = SZ_4K, 93 .type = MT_DEVICE, 94 }, 95}; 96 97static void __init cpu8815_map_io(void) 98{ 99 iotable_init(cpu8815_io_desc, ARRAY_SIZE(cpu8815_io_desc)); 100} 101 102static void cpu8815_restart(enum reboot_mode mode, const char *cmd) 103{ 104 void __iomem *srcbase = ioremap(NOMADIK_SRC_BASE, SZ_4K); 105 106 /* FIXME: use egpio when implemented */ 107 108 /* Write anything to Reset status register */ 109 writel(1, srcbase + 0x18); 110} 111 112/* 113 * This GPIO pin turns on a line that is used to detect card insertion 114 * on this board. 115 */ 116static int __init cpu8815_mmcsd_init(void) 117{ 118 struct device_node *cdbias; 119 int gpio, err; 120 121 cdbias = of_find_node_by_path("/usb-s8815/mmcsd-gpio"); 122 if (!cdbias) { 123 pr_info("could not find MMC/SD card detect bias node\n"); 124 return 0; 125 } 126 gpio = of_get_gpio(cdbias, 0); 127 if (gpio < 0) { 128 pr_info("could not obtain MMC/SD card detect bias GPIO\n"); 129 return 0; 130 } 131 err = gpio_request(gpio, "card detect bias"); 132 if (err) { 133 pr_info("failed to request card detect bias GPIO %d\n", gpio); 134 return -ENODEV; 135 } 136 err = gpio_direction_output(gpio, 0); 137 if (err){ 138 pr_info("failed to set GPIO %d as output, low\n", gpio); 139 return err; 140 } 141 pr_info("enabled USB-S8815 CD bias GPIO %d, low\n", gpio); 142 return 0; 143} 144device_initcall(cpu8815_mmcsd_init); 145 146static const char * cpu8815_board_compat[] = { 147 "st,nomadik-nhk-15", 148 "calaosystems,usb-s8815", 149 NULL, 150}; 151 152DT_MACHINE_START(NOMADIK_DT, "Nomadik STn8815") 153 /* At full speed latency must be >=2, so 0x249 in low bits */ 154 .l2c_aux_val = 0x00700249, 155 .l2c_aux_mask = 0xfe0fefff, 156 .map_io = cpu8815_map_io, 157 .restart = cpu8815_restart, 158 .dt_compat = cpu8815_board_compat, 159MACHINE_END 160