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/irqchip.h> 29 #include <linux/platform_data/clk-nomadik.h> 30 #include <linux/platform_data/pinctrl-nomadik.h> 31 #include <linux/pinctrl/machine.h> 32 #include <linux/clocksource.h> 33 #include <linux/of_irq.h> 34 #include <linux/of_gpio.h> 35 #include <linux/of_address.h> 36 #include <linux/of_platform.h> 37 #include <linux/mtd/fsmc.h> 38 #include <linux/gpio.h> 39 #include <linux/amba/mmci.h> 40 41 #include <asm/mach/arch.h> 42 #include <asm/mach/map.h> 43 #include <asm/mach/time.h> 44 #include <asm/mach-types.h> 45 46 #include <asm/cacheflush.h> 47 #include <asm/hardware/cache-l2x0.h> 48 49 /* 50 * These are the only hard-coded address offsets we still have to use. 51 */ 52 #define NOMADIK_FSMC_BASE 0x10100000 /* FSMC registers */ 53 #define NOMADIK_SDRAMC_BASE 0x10110000 /* SDRAM Controller */ 54 #define NOMADIK_CLCDC_BASE 0x10120000 /* CLCD Controller */ 55 #define NOMADIK_MDIF_BASE 0x10120000 /* MDIF */ 56 #define NOMADIK_DMA0_BASE 0x10130000 /* DMA0 Controller */ 57 #define NOMADIK_IC_BASE 0x10140000 /* Vectored Irq Controller */ 58 #define NOMADIK_DMA1_BASE 0x10150000 /* DMA1 Controller */ 59 #define NOMADIK_USB_BASE 0x10170000 /* USB-OTG conf reg base */ 60 #define NOMADIK_CRYP_BASE 0x10180000 /* Crypto processor */ 61 #define NOMADIK_SHA1_BASE 0x10190000 /* SHA-1 Processor */ 62 #define NOMADIK_XTI_BASE 0x101A0000 /* XTI */ 63 #define NOMADIK_RNG_BASE 0x101B0000 /* Random number generator */ 64 #define NOMADIK_SRC_BASE 0x101E0000 /* SRC base */ 65 #define NOMADIK_WDOG_BASE 0x101E1000 /* Watchdog */ 66 #define NOMADIK_MTU0_BASE 0x101E2000 /* Multiple Timer 0 */ 67 #define NOMADIK_MTU1_BASE 0x101E3000 /* Multiple Timer 1 */ 68 #define NOMADIK_GPIO0_BASE 0x101E4000 /* GPIO0 */ 69 #define NOMADIK_GPIO1_BASE 0x101E5000 /* GPIO1 */ 70 #define NOMADIK_GPIO2_BASE 0x101E6000 /* GPIO2 */ 71 #define NOMADIK_GPIO3_BASE 0x101E7000 /* GPIO3 */ 72 #define NOMADIK_RTC_BASE 0x101E8000 /* Real Time Clock base */ 73 #define NOMADIK_PMU_BASE 0x101E9000 /* Power Management Unit */ 74 #define NOMADIK_OWM_BASE 0x101EA000 /* One wire master */ 75 #define NOMADIK_SCR_BASE 0x101EF000 /* Secure Control registers */ 76 #define NOMADIK_MSP2_BASE 0x101F0000 /* MSP 2 interface */ 77 #define NOMADIK_MSP1_BASE 0x101F1000 /* MSP 1 interface */ 78 #define NOMADIK_UART2_BASE 0x101F2000 /* UART 2 interface */ 79 #define NOMADIK_SSIRx_BASE 0x101F3000 /* SSI 8-ch rx interface */ 80 #define NOMADIK_SSITx_BASE 0x101F4000 /* SSI 8-ch tx interface */ 81 #define NOMADIK_MSHC_BASE 0x101F5000 /* Memory Stick(Pro) Host */ 82 #define NOMADIK_SDI_BASE 0x101F6000 /* SD-card/MM-Card */ 83 #define NOMADIK_I2C1_BASE 0x101F7000 /* I2C1 interface */ 84 #define NOMADIK_I2C0_BASE 0x101F8000 /* I2C0 interface */ 85 #define NOMADIK_MSP0_BASE 0x101F9000 /* MSP 0 interface */ 86 #define NOMADIK_FIRDA_BASE 0x101FA000 /* FIrDA interface */ 87 #define NOMADIK_UART1_BASE 0x101FB000 /* UART 1 interface */ 88 #define NOMADIK_SSP_BASE 0x101FC000 /* SSP interface */ 89 #define NOMADIK_UART0_BASE 0x101FD000 /* UART 0 interface */ 90 #define NOMADIK_SGA_BASE 0x101FE000 /* SGA interface */ 91 #define NOMADIK_L2CC_BASE 0x10210000 /* L2 Cache controller */ 92 #define NOMADIK_UART1_VBASE 0xF01FB000 93 94 static unsigned long out_low[] = { PIN_OUTPUT_LOW }; 95 static unsigned long out_high[] = { PIN_OUTPUT_HIGH }; 96 static unsigned long in_nopull[] = { PIN_INPUT_NOPULL }; 97 static unsigned long in_pullup[] = { PIN_INPUT_PULLUP }; 98 99 static struct pinctrl_map __initdata nhk8815_pinmap[] = { 100 PIN_MAP_MUX_GROUP_DEFAULT("uart0", "pinctrl-stn8815", "u0_a_1", "u0"), 101 PIN_MAP_MUX_GROUP_DEFAULT("uart1", "pinctrl-stn8815", "u1_a_1", "u1"), 102 /* User LED on S8815 */ 103 PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO2_C5", out_high), 104 /* User button on S8815 */ 105 PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO3_A4", in_nopull), 106 /* Hog in MMC/SD card mux */ 107 PIN_MAP_MUX_GROUP_HOG_DEFAULT("pinctrl-stn8815", "mmcsd_a_1", "mmcsd"), 108 /* MCCLK */ 109 PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO8_B10", out_low), 110 /* MCCMD */ 111 PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO9_A10", in_pullup), 112 /* MCCMDDIR */ 113 PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO10_C11", out_high), 114 /* MCDAT3-0 */ 115 PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO11_B11", in_pullup), 116 PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO12_A11", in_pullup), 117 PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO13_C12", in_pullup), 118 PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO14_B12", in_pullup), 119 /* MCDAT0DIR */ 120 PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO15_A12", out_high), 121 /* MCDAT31DIR */ 122 PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO16_C13", out_high), 123 /* MCMSFBCLK */ 124 PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO24_C15", in_pullup), 125 /* CD input GPIO */ 126 PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO111_H21", in_nopull), 127 /* CD bias drive */ 128 PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO112_J21", out_low), 129 /* I2C0 */ 130 PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO62_D3", in_pullup), 131 PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO63_D2", in_pullup), 132 /* I2C1 */ 133 PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO53_L4", in_pullup), 134 PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO54_L3", in_pullup), 135 /* I2C2 */ 136 PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO73_C21", in_pullup), 137 PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO74_C20", in_pullup), 138 }; 139 140 /* This is needed for LL-debug/earlyprintk/debug-macro.S */ 141 static struct map_desc cpu8815_io_desc[] __initdata = { 142 { 143 .virtual = NOMADIK_UART1_VBASE, 144 .pfn = __phys_to_pfn(NOMADIK_UART1_BASE), 145 .length = SZ_4K, 146 .type = MT_DEVICE, 147 }, 148 }; 149 150 static void __init cpu8815_map_io(void) 151 { 152 iotable_init(cpu8815_io_desc, ARRAY_SIZE(cpu8815_io_desc)); 153 } 154 155 static void cpu8815_restart(char mode, const char *cmd) 156 { 157 void __iomem *srcbase = ioremap(NOMADIK_SRC_BASE, SZ_4K); 158 159 /* FIXME: use egpio when implemented */ 160 161 /* Write anything to Reset status register */ 162 writel(1, srcbase + 0x18); 163 } 164 165 /* Initial value for SRC control register: all timers use MXTAL/8 source */ 166 #define SRC_CR_INIT_MASK 0x00007fff 167 #define SRC_CR_INIT_VAL 0x2aaa8000 168 169 static void __init cpu8815_timer_init_of(void) 170 { 171 struct device_node *mtu; 172 void __iomem *base; 173 int irq; 174 u32 src_cr; 175 176 /* We need this to be up now */ 177 nomadik_clk_init(); 178 179 mtu = of_find_node_by_path("/mtu@101e2000"); 180 if (!mtu) 181 return; 182 base = of_iomap(mtu, 0); 183 if (WARN_ON(!base)) 184 return; 185 irq = irq_of_parse_and_map(mtu, 0); 186 187 pr_info("Remapped MTU @ %p, irq: %d\n", base, irq); 188 189 /* Configure timer sources in "system reset controller" ctrl reg */ 190 src_cr = readl(base); 191 src_cr &= SRC_CR_INIT_MASK; 192 src_cr |= SRC_CR_INIT_VAL; 193 writel(src_cr, base); 194 195 clocksource_of_init(); 196 } 197 198 static struct fsmc_nand_timings cpu8815_nand_timings = { 199 .thiz = 0, 200 .thold = 0x10, 201 .twait = 0x0A, 202 .tset = 0, 203 }; 204 205 static struct fsmc_nand_platform_data cpu8815_nand_data = { 206 .nand_timings = &cpu8815_nand_timings, 207 }; 208 209 /* 210 * The SMSC911x IRQ is connected to a GPIO pin, but the driver expects 211 * to simply request an IRQ passed as a resource. So the GPIO pin needs 212 * to be requested by this hog and set as input. 213 */ 214 static int __init cpu8815_eth_init(void) 215 { 216 struct device_node *eth; 217 int gpio, irq, err; 218 219 eth = of_find_node_by_path("/usb-s8815/ethernet-gpio"); 220 if (!eth) { 221 pr_info("could not find any ethernet GPIO\n"); 222 return 0; 223 } 224 gpio = of_get_gpio(eth, 0); 225 err = gpio_request(gpio, "eth_irq"); 226 if (err) { 227 pr_info("failed to request ethernet GPIO\n"); 228 return -ENODEV; 229 } 230 err = gpio_direction_input(gpio); 231 if (err) { 232 pr_info("failed to set ethernet GPIO as input\n"); 233 return -ENODEV; 234 } 235 irq = gpio_to_irq(gpio); 236 pr_info("enabled USB-S8815 ethernet GPIO %d, IRQ %d\n", gpio, irq); 237 return 0; 238 } 239 device_initcall(cpu8815_eth_init); 240 241 /* 242 * TODO: 243 * cannot be set from device tree, convert to a proper DT 244 * binding. 245 */ 246 static struct mmci_platform_data mmcsd_plat_data = { 247 .ocr_mask = MMC_VDD_29_30, 248 }; 249 250 /* 251 * This GPIO pin turns on a line that is used to detect card insertion 252 * on this board. 253 */ 254 static int __init cpu8815_mmcsd_init(void) 255 { 256 struct device_node *cdbias; 257 int gpio, err; 258 259 cdbias = of_find_node_by_path("/usb-s8815/mmcsd-gpio"); 260 if (!cdbias) { 261 pr_info("could not find MMC/SD card detect bias node\n"); 262 return 0; 263 } 264 gpio = of_get_gpio(cdbias, 0); 265 if (gpio < 0) { 266 pr_info("could not obtain MMC/SD card detect bias GPIO\n"); 267 return 0; 268 } 269 err = gpio_request(gpio, "card detect bias"); 270 if (err) { 271 pr_info("failed to request card detect bias GPIO %d\n", gpio); 272 return -ENODEV; 273 } 274 err = gpio_direction_output(gpio, 0); 275 if (err){ 276 pr_info("failed to set GPIO %d as output, low\n", gpio); 277 return err; 278 } 279 pr_info("enabled USB-S8815 CD bias GPIO %d, low\n", gpio); 280 return 0; 281 } 282 device_initcall(cpu8815_mmcsd_init); 283 284 285 /* These are mostly to get the right device names for the clock lookups */ 286 static struct of_dev_auxdata cpu8815_auxdata_lookup[] __initdata = { 287 OF_DEV_AUXDATA("stericsson,nmk-pinctrl-stn8815", 0, 288 "pinctrl-stn8815", NULL), 289 OF_DEV_AUXDATA("stericsson,fsmc-nand", NOMADIK_FSMC_BASE, 290 NULL, &cpu8815_nand_data), 291 OF_DEV_AUXDATA("arm,primecell", NOMADIK_SDI_BASE, 292 NULL, &mmcsd_plat_data), 293 { /* sentinel */ }, 294 }; 295 296 static void __init cpu8815_init_of(void) 297 { 298 #ifdef CONFIG_CACHE_L2X0 299 /* At full speed latency must be >=2, so 0x249 in low bits */ 300 l2x0_of_init(0x00730249, 0xfe000fff); 301 #endif 302 pinctrl_register_mappings(nhk8815_pinmap, ARRAY_SIZE(nhk8815_pinmap)); 303 of_platform_populate(NULL, of_default_bus_match_table, 304 cpu8815_auxdata_lookup, NULL); 305 } 306 307 static const char * cpu8815_board_compat[] = { 308 "calaosystems,usb-s8815", 309 NULL, 310 }; 311 312 DT_MACHINE_START(NOMADIK_DT, "Nomadik STn8815") 313 .map_io = cpu8815_map_io, 314 .init_irq = irqchip_init, 315 .init_time = cpu8815_timer_init_of, 316 .init_machine = cpu8815_init_of, 317 .restart = cpu8815_restart, 318 .dt_compat = cpu8815_board_compat, 319 MACHINE_END 320