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_address.h> 35 #include <linux/of_platform.h> 36 #include <linux/mtd/fsmc.h> 37 38 #include <mach/hardware.h> 39 #include <mach/irqs.h> 40 #include <asm/mach/arch.h> 41 #include <asm/mach/map.h> 42 #include <asm/mach/time.h> 43 #include <asm/mach-types.h> 44 45 #include <asm/cacheflush.h> 46 #include <asm/hardware/cache-l2x0.h> 47 48 #include "cpu-8815.h" 49 50 /* The 8815 has 4 GPIO blocks, let's register them immediately */ 51 static resource_size_t __initdata cpu8815_gpio_base[] = { 52 NOMADIK_GPIO0_BASE, 53 NOMADIK_GPIO1_BASE, 54 NOMADIK_GPIO2_BASE, 55 NOMADIK_GPIO3_BASE, 56 }; 57 58 static struct platform_device * 59 cpu8815_add_gpio(int id, resource_size_t addr, int irq, 60 struct nmk_gpio_platform_data *pdata) 61 { 62 struct resource resources[] = { 63 { 64 .start = addr, 65 .end = addr + 127, 66 .flags = IORESOURCE_MEM, 67 }, 68 { 69 .start = irq, 70 .end = irq, 71 .flags = IORESOURCE_IRQ, 72 } 73 }; 74 75 return platform_device_register_resndata(NULL, "gpio", id, 76 resources, ARRAY_SIZE(resources), 77 pdata, sizeof(*pdata)); 78 } 79 80 void cpu8815_add_gpios(resource_size_t *base, int num, int irq, 81 struct nmk_gpio_platform_data *pdata) 82 { 83 int first = 0; 84 int i; 85 86 for (i = 0; i < num; i++, first += 32, irq++) { 87 pdata->first_gpio = first; 88 pdata->first_irq = NOMADIK_GPIO_TO_IRQ(first); 89 pdata->num_gpio = 32; 90 91 cpu8815_add_gpio(i, base[i], irq, pdata); 92 } 93 } 94 95 static unsigned long out_low[] = { PIN_OUTPUT_LOW }; 96 static unsigned long out_high[] = { PIN_OUTPUT_HIGH }; 97 static unsigned long in_nopull[] = { PIN_INPUT_NOPULL }; 98 static unsigned long in_pullup[] = { PIN_INPUT_PULLUP }; 99 100 static struct pinctrl_map __initdata nhk8815_pinmap[] = { 101 PIN_MAP_MUX_GROUP_DEFAULT("uart0", "pinctrl-stn8815", "u0_a_1", "u0"), 102 PIN_MAP_MUX_GROUP_DEFAULT("uart1", "pinctrl-stn8815", "u1_a_1", "u1"), 103 /* Hog in MMC/SD card mux */ 104 PIN_MAP_MUX_GROUP_HOG_DEFAULT("pinctrl-stn8815", "mmcsd_a_1", "mmcsd"), 105 /* MCCLK */ 106 PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO8_B10", out_low), 107 /* MCCMD */ 108 PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO9_A10", in_pullup), 109 /* MCCMDDIR */ 110 PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO10_C11", out_high), 111 /* MCDAT3-0 */ 112 PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO11_B11", in_pullup), 113 PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO12_A11", in_pullup), 114 PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO13_C12", in_pullup), 115 PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO14_B12", in_pullup), 116 /* MCDAT0DIR */ 117 PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO15_A12", out_high), 118 /* MCDAT31DIR */ 119 PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO16_C13", out_high), 120 /* MCMSFBCLK */ 121 PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO24_C15", in_pullup), 122 /* CD input GPIO */ 123 PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO111_H21", in_nopull), 124 /* CD bias drive */ 125 PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO112_J21", out_low), 126 /* I2C0 */ 127 PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO62_D3", in_pullup), 128 PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO63_D2", in_pullup), 129 /* I2C1 */ 130 PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO53_L4", in_pullup), 131 PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO54_L3", in_pullup), 132 /* I2C2 */ 133 PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO73_C21", in_pullup), 134 PIN_MAP_CONFIGS_PIN_HOG_DEFAULT("pinctrl-stn8815", "GPIO74_C20", in_pullup), 135 }; 136 137 static inline void 138 cpu8815_add_pinctrl(struct device *parent, const char *name) 139 { 140 struct platform_device_info pdevinfo = { 141 .parent = parent, 142 .name = name, 143 .id = -1, 144 }; 145 146 pinctrl_register_mappings(nhk8815_pinmap, ARRAY_SIZE(nhk8815_pinmap)); 147 platform_device_register_full(&pdevinfo); 148 } 149 150 static int __init cpu8815_init(void) 151 { 152 struct nmk_gpio_platform_data pdata = { 153 /* No custom data yet */ 154 }; 155 156 /* For e.g. device tree boots */ 157 if (!machine_is_nomadik()) 158 return 0; 159 160 cpu8815_add_gpios(cpu8815_gpio_base, ARRAY_SIZE(cpu8815_gpio_base), 161 IRQ_GPIO0, &pdata); 162 cpu8815_add_pinctrl(NULL, "pinctrl-stn8815"); 163 amba_apb_device_add(NULL, "rng", NOMADIK_RNG_BASE, SZ_4K, 0, 0, NULL, 0); 164 amba_apb_device_add(NULL, "rtc-pl031", NOMADIK_RTC_BASE, SZ_4K, IRQ_RTC_RTT, 0, NULL, 0); 165 return 0; 166 } 167 arch_initcall(cpu8815_init); 168 169 /* All SoC devices live in the same area (see hardware.h) */ 170 static struct map_desc nomadik_io_desc[] __initdata = { 171 { 172 .virtual = NOMADIK_IO_VIRTUAL, 173 .pfn = __phys_to_pfn(NOMADIK_IO_PHYSICAL), 174 .length = NOMADIK_IO_SIZE, 175 .type = MT_DEVICE, 176 } 177 /* static ram and secured ram may be added later */ 178 }; 179 180 void __init cpu8815_map_io(void) 181 { 182 iotable_init(nomadik_io_desc, ARRAY_SIZE(nomadik_io_desc)); 183 } 184 185 void __init cpu8815_init_irq(void) 186 { 187 /* This modified VIC cell has two register blocks, at 0 and 0x20 */ 188 vic_init(io_p2v(NOMADIK_IC_BASE + 0x00), IRQ_VIC_START + 0, ~0, 0); 189 vic_init(io_p2v(NOMADIK_IC_BASE + 0x20), IRQ_VIC_START + 32, ~0, 0); 190 191 /* 192 * Init clocks here so that they are available for system timer 193 * initialization. 194 */ 195 nomadik_clk_init(); 196 } 197 198 /* 199 * This function is called from the board init ("init_machine"). 200 */ 201 void __init cpu8815_platform_init(void) 202 { 203 #ifdef CONFIG_CACHE_L2X0 204 /* At full speed latency must be >=2, so 0x249 in low bits */ 205 l2x0_init(io_p2v(NOMADIK_L2CC_BASE), 0x00730249, 0xfe000fff); 206 #endif 207 return; 208 } 209 210 void cpu8815_restart(char mode, const char *cmd) 211 { 212 void __iomem *src_rstsr = io_p2v(NOMADIK_SRC_BASE + 0x18); 213 214 /* FIXME: use egpio when implemented */ 215 216 /* Write anything to Reset status register */ 217 writel(1, src_rstsr); 218 } 219 220 #ifdef CONFIG_OF 221 222 /* Initial value for SRC control register: all timers use MXTAL/8 source */ 223 #define SRC_CR_INIT_MASK 0x00007fff 224 #define SRC_CR_INIT_VAL 0x2aaa8000 225 226 static void __init cpu8815_timer_init_of(void) 227 { 228 struct device_node *mtu; 229 void __iomem *base; 230 int irq; 231 u32 src_cr; 232 233 /* We need this to be up now */ 234 nomadik_clk_init(); 235 236 mtu = of_find_node_by_path("/mtu0"); 237 if (!mtu) 238 return; 239 base = of_iomap(mtu, 0); 240 if (WARN_ON(!base)) 241 return; 242 irq = irq_of_parse_and_map(mtu, 0); 243 244 pr_info("Remapped MTU @ %p, irq: %d\n", base, irq); 245 246 /* Configure timer sources in "system reset controller" ctrl reg */ 247 src_cr = readl(base); 248 src_cr &= SRC_CR_INIT_MASK; 249 src_cr |= SRC_CR_INIT_VAL; 250 writel(src_cr, base); 251 252 nmdk_timer_init(base, irq); 253 } 254 255 static struct fsmc_nand_timings cpu8815_nand_timings = { 256 .thiz = 0, 257 .thold = 0x10, 258 .twait = 0x0A, 259 .tset = 0, 260 }; 261 262 static struct fsmc_nand_platform_data cpu8815_nand_data = { 263 .nand_timings = &cpu8815_nand_timings, 264 }; 265 266 /* These are mostly to get the right device names for the clock lookups */ 267 static struct of_dev_auxdata cpu8815_auxdata_lookup[] __initdata = { 268 OF_DEV_AUXDATA("st,nomadik-gpio", NOMADIK_GPIO0_BASE, 269 "gpio.0", NULL), 270 OF_DEV_AUXDATA("st,nomadik-gpio", NOMADIK_GPIO1_BASE, 271 "gpio.1", NULL), 272 OF_DEV_AUXDATA("st,nomadik-gpio", NOMADIK_GPIO2_BASE, 273 "gpio.2", NULL), 274 OF_DEV_AUXDATA("st,nomadik-gpio", NOMADIK_GPIO3_BASE, 275 "gpio.3", NULL), 276 OF_DEV_AUXDATA("stericsson,nmk-pinctrl-stn8815", 0, 277 "pinctrl-stn8815", NULL), 278 OF_DEV_AUXDATA("arm,primecell", NOMADIK_UART0_BASE, 279 "uart0", NULL), 280 OF_DEV_AUXDATA("arm,primecell", NOMADIK_UART1_BASE, 281 "uart1", NULL), 282 OF_DEV_AUXDATA("arm,primecell", NOMADIK_RNG_BASE, 283 "rng", NULL), 284 OF_DEV_AUXDATA("arm,primecell", NOMADIK_RTC_BASE, 285 "rtc-pl031", NULL), 286 OF_DEV_AUXDATA("stericsson,fsmc-nand", NOMADIK_FSMC_BASE, 287 "fsmc-nand", &cpu8815_nand_data), 288 289 { /* sentinel */ }, 290 }; 291 292 static void __init cpu8815_init_of(void) 293 { 294 #ifdef CONFIG_CACHE_L2X0 295 /* At full speed latency must be >=2, so 0x249 in low bits */ 296 l2x0_of_init(0x00730249, 0xfe000fff); 297 #endif 298 pinctrl_register_mappings(nhk8815_pinmap, ARRAY_SIZE(nhk8815_pinmap)); 299 of_platform_populate(NULL, of_default_bus_match_table, 300 cpu8815_auxdata_lookup, NULL); 301 } 302 303 static const char * cpu8815_board_compat[] = { 304 "calaosystems,usb-s8815", 305 NULL, 306 }; 307 308 DT_MACHINE_START(NOMADIK_DT, "Nomadik STn8815") 309 .map_io = cpu8815_map_io, 310 .init_irq = irqchip_init, 311 .init_time = cpu8815_timer_init_of, 312 .init_machine = cpu8815_init_of, 313 .restart = cpu8815_restart, 314 .dt_compat = cpu8815_board_compat, 315 MACHINE_END 316 317 #endif 318