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 */ 88 static 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 97 static void __init cpu8815_map_io(void) 98 { 99 iotable_init(cpu8815_io_desc, ARRAY_SIZE(cpu8815_io_desc)); 100 } 101 102 static 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 */ 116 static 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 } 144 device_initcall(cpu8815_mmcsd_init); 145 146 static void __init cpu8815_init_of(void) 147 { 148 #ifdef CONFIG_CACHE_L2X0 149 /* At full speed latency must be >=2, so 0x249 in low bits */ 150 l2x0_of_init(0x00730249, 0xfe000fff); 151 #endif 152 of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL); 153 } 154 155 static const char * cpu8815_board_compat[] = { 156 "calaosystems,usb-s8815", 157 NULL, 158 }; 159 160 DT_MACHINE_START(NOMADIK_DT, "Nomadik STn8815") 161 .map_io = cpu8815_map_io, 162 .init_machine = cpu8815_init_of, 163 .restart = cpu8815_restart, 164 .dt_compat = cpu8815_board_compat, 165 MACHINE_END 166