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/platform_data/clk-nomadik.h> 29 #include <linux/clocksource.h> 30 #include <linux/of_irq.h> 31 #include <linux/of_gpio.h> 32 #include <linux/of_address.h> 33 #include <linux/of_platform.h> 34 #include <linux/gpio.h> 35 36 #include <asm/mach/arch.h> 37 #include <asm/mach/map.h> 38 #include <asm/mach/time.h> 39 #include <asm/mach-types.h> 40 41 #include <asm/cacheflush.h> 42 #include <asm/hardware/cache-l2x0.h> 43 44 /* 45 * These are the only hard-coded address offsets we still have to use. 46 */ 47 #define NOMADIK_FSMC_BASE 0x10100000 /* FSMC registers */ 48 #define NOMADIK_SDRAMC_BASE 0x10110000 /* SDRAM Controller */ 49 #define NOMADIK_CLCDC_BASE 0x10120000 /* CLCD Controller */ 50 #define NOMADIK_MDIF_BASE 0x10120000 /* MDIF */ 51 #define NOMADIK_DMA0_BASE 0x10130000 /* DMA0 Controller */ 52 #define NOMADIK_IC_BASE 0x10140000 /* Vectored Irq Controller */ 53 #define NOMADIK_DMA1_BASE 0x10150000 /* DMA1 Controller */ 54 #define NOMADIK_USB_BASE 0x10170000 /* USB-OTG conf reg base */ 55 #define NOMADIK_CRYP_BASE 0x10180000 /* Crypto processor */ 56 #define NOMADIK_SHA1_BASE 0x10190000 /* SHA-1 Processor */ 57 #define NOMADIK_XTI_BASE 0x101A0000 /* XTI */ 58 #define NOMADIK_RNG_BASE 0x101B0000 /* Random number generator */ 59 #define NOMADIK_SRC_BASE 0x101E0000 /* SRC base */ 60 #define NOMADIK_WDOG_BASE 0x101E1000 /* Watchdog */ 61 #define NOMADIK_MTU0_BASE 0x101E2000 /* Multiple Timer 0 */ 62 #define NOMADIK_MTU1_BASE 0x101E3000 /* Multiple Timer 1 */ 63 #define NOMADIK_GPIO0_BASE 0x101E4000 /* GPIO0 */ 64 #define NOMADIK_GPIO1_BASE 0x101E5000 /* GPIO1 */ 65 #define NOMADIK_GPIO2_BASE 0x101E6000 /* GPIO2 */ 66 #define NOMADIK_GPIO3_BASE 0x101E7000 /* GPIO3 */ 67 #define NOMADIK_RTC_BASE 0x101E8000 /* Real Time Clock base */ 68 #define NOMADIK_PMU_BASE 0x101E9000 /* Power Management Unit */ 69 #define NOMADIK_OWM_BASE 0x101EA000 /* One wire master */ 70 #define NOMADIK_SCR_BASE 0x101EF000 /* Secure Control registers */ 71 #define NOMADIK_MSP2_BASE 0x101F0000 /* MSP 2 interface */ 72 #define NOMADIK_MSP1_BASE 0x101F1000 /* MSP 1 interface */ 73 #define NOMADIK_UART2_BASE 0x101F2000 /* UART 2 interface */ 74 #define NOMADIK_SSIRx_BASE 0x101F3000 /* SSI 8-ch rx interface */ 75 #define NOMADIK_SSITx_BASE 0x101F4000 /* SSI 8-ch tx interface */ 76 #define NOMADIK_MSHC_BASE 0x101F5000 /* Memory Stick(Pro) Host */ 77 #define NOMADIK_SDI_BASE 0x101F6000 /* SD-card/MM-Card */ 78 #define NOMADIK_I2C1_BASE 0x101F7000 /* I2C1 interface */ 79 #define NOMADIK_I2C0_BASE 0x101F8000 /* I2C0 interface */ 80 #define NOMADIK_MSP0_BASE 0x101F9000 /* MSP 0 interface */ 81 #define NOMADIK_FIRDA_BASE 0x101FA000 /* FIrDA interface */ 82 #define NOMADIK_UART1_BASE 0x101FB000 /* UART 1 interface */ 83 #define NOMADIK_SSP_BASE 0x101FC000 /* SSP interface */ 84 #define NOMADIK_UART0_BASE 0x101FD000 /* UART 0 interface */ 85 #define NOMADIK_SGA_BASE 0x101FE000 /* SGA interface */ 86 #define NOMADIK_L2CC_BASE 0x10210000 /* L2 Cache controller */ 87 #define NOMADIK_UART1_VBASE 0xF01FB000 88 89 /* This is needed for LL-debug/earlyprintk/debug-macro.S */ 90 static struct map_desc cpu8815_io_desc[] __initdata = { 91 { 92 .virtual = NOMADIK_UART1_VBASE, 93 .pfn = __phys_to_pfn(NOMADIK_UART1_BASE), 94 .length = SZ_4K, 95 .type = MT_DEVICE, 96 }, 97 }; 98 99 static void __init cpu8815_map_io(void) 100 { 101 iotable_init(cpu8815_io_desc, ARRAY_SIZE(cpu8815_io_desc)); 102 } 103 104 static void cpu8815_restart(enum reboot_mode mode, const char *cmd) 105 { 106 void __iomem *srcbase = ioremap(NOMADIK_SRC_BASE, SZ_4K); 107 108 /* FIXME: use egpio when implemented */ 109 110 /* Write anything to Reset status register */ 111 writel(1, srcbase + 0x18); 112 } 113 114 /* Initial value for SRC control register: all timers use MXTAL/8 source */ 115 #define SRC_CR_INIT_MASK 0x00007fff 116 #define SRC_CR_INIT_VAL 0x2aaa8000 117 118 static void __init cpu8815_timer_init_of(void) 119 { 120 struct device_node *mtu; 121 void __iomem *base; 122 int irq; 123 u32 src_cr; 124 125 /* We need this to be up now */ 126 nomadik_clk_init(); 127 128 mtu = of_find_node_by_path("/mtu@101e2000"); 129 if (!mtu) 130 return; 131 base = of_iomap(mtu, 0); 132 if (WARN_ON(!base)) 133 return; 134 irq = irq_of_parse_and_map(mtu, 0); 135 136 pr_info("Remapped MTU @ %p, irq: %d\n", base, irq); 137 138 /* Configure timer sources in "system reset controller" ctrl reg */ 139 src_cr = readl(base); 140 src_cr &= SRC_CR_INIT_MASK; 141 src_cr |= SRC_CR_INIT_VAL; 142 writel(src_cr, base); 143 144 clocksource_of_init(); 145 } 146 147 /* 148 * The SMSC911x IRQ is connected to a GPIO pin, but the driver expects 149 * to simply request an IRQ passed as a resource. So the GPIO pin needs 150 * to be requested by this hog and set as input. 151 */ 152 static int __init cpu8815_eth_init(void) 153 { 154 struct device_node *eth; 155 int gpio, irq, err; 156 157 eth = of_find_node_by_path("/usb-s8815/ethernet-gpio"); 158 if (!eth) { 159 pr_info("could not find any ethernet GPIO\n"); 160 return 0; 161 } 162 gpio = of_get_gpio(eth, 0); 163 err = gpio_request(gpio, "eth_irq"); 164 if (err) { 165 pr_info("failed to request ethernet GPIO\n"); 166 return -ENODEV; 167 } 168 err = gpio_direction_input(gpio); 169 if (err) { 170 pr_info("failed to set ethernet GPIO as input\n"); 171 return -ENODEV; 172 } 173 irq = gpio_to_irq(gpio); 174 pr_info("enabled USB-S8815 ethernet GPIO %d, IRQ %d\n", gpio, irq); 175 return 0; 176 } 177 device_initcall(cpu8815_eth_init); 178 179 /* 180 * This GPIO pin turns on a line that is used to detect card insertion 181 * on this board. 182 */ 183 static int __init cpu8815_mmcsd_init(void) 184 { 185 struct device_node *cdbias; 186 int gpio, err; 187 188 cdbias = of_find_node_by_path("/usb-s8815/mmcsd-gpio"); 189 if (!cdbias) { 190 pr_info("could not find MMC/SD card detect bias node\n"); 191 return 0; 192 } 193 gpio = of_get_gpio(cdbias, 0); 194 if (gpio < 0) { 195 pr_info("could not obtain MMC/SD card detect bias GPIO\n"); 196 return 0; 197 } 198 err = gpio_request(gpio, "card detect bias"); 199 if (err) { 200 pr_info("failed to request card detect bias GPIO %d\n", gpio); 201 return -ENODEV; 202 } 203 err = gpio_direction_output(gpio, 0); 204 if (err){ 205 pr_info("failed to set GPIO %d as output, low\n", gpio); 206 return err; 207 } 208 pr_info("enabled USB-S8815 CD bias GPIO %d, low\n", gpio); 209 return 0; 210 } 211 device_initcall(cpu8815_mmcsd_init); 212 213 static void __init cpu8815_init_of(void) 214 { 215 #ifdef CONFIG_CACHE_L2X0 216 /* At full speed latency must be >=2, so 0x249 in low bits */ 217 l2x0_of_init(0x00730249, 0xfe000fff); 218 #endif 219 of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL); 220 } 221 222 static const char * cpu8815_board_compat[] = { 223 "calaosystems,usb-s8815", 224 NULL, 225 }; 226 227 DT_MACHINE_START(NOMADIK_DT, "Nomadik STn8815") 228 .map_io = cpu8815_map_io, 229 .init_time = cpu8815_timer_init_of, 230 .init_machine = cpu8815_init_of, 231 .restart = cpu8815_restart, 232 .dt_compat = cpu8815_board_compat, 233 MACHINE_END 234