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/platform_data/clocksource-nomadik-mtu.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 40 #include <mach/hardware.h> 41 #include <mach/irqs.h> 42 #include <asm/mach/arch.h> 43 #include <asm/mach/map.h> 44 #include <asm/mach/time.h> 45 #include <asm/mach-types.h> 46 47 #include <asm/cacheflush.h> 48 #include <asm/hardware/cache-l2x0.h> 49 50 #include "cpu-8815.h" 51 52 /* The 8815 has 4 GPIO blocks, let's register them immediately */ 53 static resource_size_t __initdata cpu8815_gpio_base[] = { 54 NOMADIK_GPIO0_BASE, 55 NOMADIK_GPIO1_BASE, 56 NOMADIK_GPIO2_BASE, 57 NOMADIK_GPIO3_BASE, 58 }; 59 60 static struct platform_device * 61 cpu8815_add_gpio(int id, resource_size_t addr, int irq, 62 struct nmk_gpio_platform_data *pdata) 63 { 64 struct resource resources[] = { 65 { 66 .start = addr, 67 .end = addr + 127, 68 .flags = IORESOURCE_MEM, 69 }, 70 { 71 .start = irq, 72 .end = irq, 73 .flags = IORESOURCE_IRQ, 74 } 75 }; 76 77 return platform_device_register_resndata(NULL, "gpio", id, 78 resources, ARRAY_SIZE(resources), 79 pdata, sizeof(*pdata)); 80 } 81 82 void cpu8815_add_gpios(resource_size_t *base, int num, int irq, 83 struct nmk_gpio_platform_data *pdata) 84 { 85 int first = 0; 86 int i; 87 88 for (i = 0; i < num; i++, first += 32, irq++) { 89 pdata->first_gpio = first; 90 pdata->first_irq = NOMADIK_GPIO_TO_IRQ(first); 91 pdata->num_gpio = 32; 92 93 cpu8815_add_gpio(i, base[i], irq, pdata); 94 } 95 } 96 97 static unsigned long out_low[] = { PIN_OUTPUT_LOW }; 98 static unsigned long out_high[] = { PIN_OUTPUT_HIGH }; 99 static unsigned long in_nopull[] = { PIN_INPUT_NOPULL }; 100 static unsigned long in_pullup[] = { PIN_INPUT_PULLUP }; 101 102 static struct pinctrl_map __initdata nhk8815_pinmap[] = { 103 PIN_MAP_MUX_GROUP_DEFAULT("uart0", "pinctrl-stn8815", "u0_a_1", "u0"), 104 PIN_MAP_MUX_GROUP_DEFAULT("uart1", "pinctrl-stn8815", "u1_a_1", "u1"), 105 /* Hog in MMC/SD card mux */ 106 PIN_MAP_MUX_GROUP_HOG_DEFAULT("pinctrl-stn8815", "mmcsd_a_1", "mmcsd"), 107 /* MCCLK */ 108 PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO8_B10", out_low), 109 /* MCCMD */ 110 PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO9_A10", in_pullup), 111 /* MCCMDDIR */ 112 PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO10_C11", out_high), 113 /* MCDAT3-0 */ 114 PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO11_B11", in_pullup), 115 PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO12_A11", in_pullup), 116 PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO13_C12", in_pullup), 117 PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO14_B12", in_pullup), 118 /* MCDAT0DIR */ 119 PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO15_A12", out_high), 120 /* MCDAT31DIR */ 121 PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO16_C13", out_high), 122 /* MCMSFBCLK */ 123 PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO24_C15", in_pullup), 124 /* CD input GPIO */ 125 PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO111_H21", in_nopull), 126 /* CD bias drive */ 127 PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO112_J21", out_low), 128 /* I2C0 */ 129 PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO62_D3", in_pullup), 130 PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO63_D2", in_pullup), 131 /* I2C1 */ 132 PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO53_L4", in_pullup), 133 PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO54_L3", in_pullup), 134 /* I2C2 */ 135 PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO73_C21", in_pullup), 136 PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO74_C20", in_pullup), 137 }; 138 139 static inline void 140 cpu8815_add_pinctrl(struct device *parent, const char *name) 141 { 142 struct platform_device_info pdevinfo = { 143 .parent = parent, 144 .name = name, 145 .id = -1, 146 }; 147 148 pinctrl_register_mappings(nhk8815_pinmap, ARRAY_SIZE(nhk8815_pinmap)); 149 platform_device_register_full(&pdevinfo); 150 } 151 152 static int __init cpu8815_init(void) 153 { 154 struct nmk_gpio_platform_data pdata = { 155 /* No custom data yet */ 156 }; 157 158 /* For e.g. device tree boots */ 159 if (!machine_is_nomadik()) 160 return 0; 161 162 cpu8815_add_gpios(cpu8815_gpio_base, ARRAY_SIZE(cpu8815_gpio_base), 163 IRQ_GPIO0, &pdata); 164 cpu8815_add_pinctrl(NULL, "pinctrl-stn8815"); 165 amba_apb_device_add(NULL, "rng", NOMADIK_RNG_BASE, SZ_4K, 0, 0, NULL, 0); 166 amba_apb_device_add(NULL, "rtc-pl031", NOMADIK_RTC_BASE, SZ_4K, IRQ_RTC_RTT, 0, NULL, 0); 167 return 0; 168 } 169 arch_initcall(cpu8815_init); 170 171 /* All SoC devices live in the same area (see hardware.h) */ 172 static struct map_desc nomadik_io_desc[] __initdata = { 173 { 174 .virtual = NOMADIK_IO_VIRTUAL, 175 .pfn = __phys_to_pfn(NOMADIK_IO_PHYSICAL), 176 .length = NOMADIK_IO_SIZE, 177 .type = MT_DEVICE, 178 } 179 /* static ram and secured ram may be added later */ 180 }; 181 182 void __init cpu8815_map_io(void) 183 { 184 iotable_init(nomadik_io_desc, ARRAY_SIZE(nomadik_io_desc)); 185 } 186 187 void __init cpu8815_init_irq(void) 188 { 189 /* This modified VIC cell has two register blocks, at 0 and 0x20 */ 190 vic_init(io_p2v(NOMADIK_IC_BASE + 0x00), IRQ_VIC_START + 0, ~0, 0); 191 vic_init(io_p2v(NOMADIK_IC_BASE + 0x20), IRQ_VIC_START + 32, ~0, 0); 192 193 /* 194 * Init clocks here so that they are available for system timer 195 * initialization. 196 */ 197 nomadik_clk_init(); 198 } 199 200 /* 201 * This function is called from the board init ("init_machine"). 202 */ 203 void __init cpu8815_platform_init(void) 204 { 205 #ifdef CONFIG_CACHE_L2X0 206 /* At full speed latency must be >=2, so 0x249 in low bits */ 207 l2x0_init(io_p2v(NOMADIK_L2CC_BASE), 0x00730249, 0xfe000fff); 208 #endif 209 return; 210 } 211 212 void cpu8815_restart(char mode, const char *cmd) 213 { 214 void __iomem *src_rstsr = io_p2v(NOMADIK_SRC_BASE + 0x18); 215 216 /* FIXME: use egpio when implemented */ 217 218 /* Write anything to Reset status register */ 219 writel(1, src_rstsr); 220 } 221 222 #ifdef CONFIG_OF 223 224 /* Initial value for SRC control register: all timers use MXTAL/8 source */ 225 #define SRC_CR_INIT_MASK 0x00007fff 226 #define SRC_CR_INIT_VAL 0x2aaa8000 227 228 static void __init cpu8815_timer_init_of(void) 229 { 230 struct device_node *mtu; 231 void __iomem *base; 232 int irq; 233 u32 src_cr; 234 235 /* We need this to be up now */ 236 nomadik_clk_init(); 237 238 mtu = of_find_node_by_path("/mtu0"); 239 if (!mtu) 240 return; 241 base = of_iomap(mtu, 0); 242 if (WARN_ON(!base)) 243 return; 244 irq = irq_of_parse_and_map(mtu, 0); 245 246 pr_info("Remapped MTU @ %p, irq: %d\n", base, irq); 247 248 /* Configure timer sources in "system reset controller" ctrl reg */ 249 src_cr = readl(base); 250 src_cr &= SRC_CR_INIT_MASK; 251 src_cr |= SRC_CR_INIT_VAL; 252 writel(src_cr, base); 253 254 nmdk_timer_init(base, irq); 255 } 256 257 static struct fsmc_nand_timings cpu8815_nand_timings = { 258 .thiz = 0, 259 .thold = 0x10, 260 .twait = 0x0A, 261 .tset = 0, 262 }; 263 264 static struct fsmc_nand_platform_data cpu8815_nand_data = { 265 .nand_timings = &cpu8815_nand_timings, 266 }; 267 268 /* 269 * The SMSC911x IRQ is connected to a GPIO pin, but the driver expects 270 * to simply request an IRQ passed as a resource. So the GPIO pin needs 271 * to be requested by this hog and set as input. 272 */ 273 static int __init cpu8815_eth_init(void) 274 { 275 struct device_node *eth; 276 int gpio, irq, err; 277 278 eth = of_find_node_by_path("/usb-s8815/ethernet-gpio"); 279 if (!eth) { 280 pr_info("could not find any ethernet GPIO\n"); 281 return 0; 282 } 283 gpio = of_get_gpio(eth, 0); 284 err = gpio_request(gpio, "eth_irq"); 285 if (err) { 286 pr_info("failed to request ethernet GPIO\n"); 287 return -ENODEV; 288 } 289 err = gpio_direction_input(gpio); 290 if (err) { 291 pr_info("failed to set ethernet GPIO as input\n"); 292 return -ENODEV; 293 } 294 irq = gpio_to_irq(gpio); 295 pr_info("enabled USB-S8815 ethernet GPIO %d, IRQ %d\n", gpio, irq); 296 return 0; 297 } 298 device_initcall(cpu8815_eth_init); 299 300 /* These are mostly to get the right device names for the clock lookups */ 301 static struct of_dev_auxdata cpu8815_auxdata_lookup[] __initdata = { 302 OF_DEV_AUXDATA("st,nomadik-gpio", NOMADIK_GPIO0_BASE, 303 "gpio.0", NULL), 304 OF_DEV_AUXDATA("st,nomadik-gpio", NOMADIK_GPIO1_BASE, 305 "gpio.1", NULL), 306 OF_DEV_AUXDATA("st,nomadik-gpio", NOMADIK_GPIO2_BASE, 307 "gpio.2", NULL), 308 OF_DEV_AUXDATA("st,nomadik-gpio", NOMADIK_GPIO3_BASE, 309 "gpio.3", NULL), 310 OF_DEV_AUXDATA("stericsson,nmk-pinctrl-stn8815", 0, 311 "pinctrl-stn8815", NULL), 312 OF_DEV_AUXDATA("arm,primecell", NOMADIK_UART0_BASE, 313 "uart0", NULL), 314 OF_DEV_AUXDATA("arm,primecell", NOMADIK_UART1_BASE, 315 "uart1", NULL), 316 OF_DEV_AUXDATA("arm,primecell", NOMADIK_RNG_BASE, 317 "rng", NULL), 318 OF_DEV_AUXDATA("arm,primecell", NOMADIK_RTC_BASE, 319 "rtc-pl031", NULL), 320 OF_DEV_AUXDATA("stericsson,fsmc-nand", NOMADIK_FSMC_BASE, 321 "fsmc-nand", &cpu8815_nand_data), 322 323 { /* sentinel */ }, 324 }; 325 326 static void __init cpu8815_init_of(void) 327 { 328 #ifdef CONFIG_CACHE_L2X0 329 /* At full speed latency must be >=2, so 0x249 in low bits */ 330 l2x0_of_init(0x00730249, 0xfe000fff); 331 #endif 332 pinctrl_register_mappings(nhk8815_pinmap, ARRAY_SIZE(nhk8815_pinmap)); 333 of_platform_populate(NULL, of_default_bus_match_table, 334 cpu8815_auxdata_lookup, NULL); 335 } 336 337 static const char * cpu8815_board_compat[] = { 338 "calaosystems,usb-s8815", 339 NULL, 340 }; 341 342 DT_MACHINE_START(NOMADIK_DT, "Nomadik STn8815") 343 .map_io = cpu8815_map_io, 344 .init_irq = irqchip_init, 345 .init_time = cpu8815_timer_init_of, 346 .init_machine = cpu8815_init_of, 347 .restart = cpu8815_restart, 348 .dt_compat = cpu8815_board_compat, 349 MACHINE_END 350 351 #endif 352