1 /* 2 * arch/arm/mach-at91/at91rm9200.c 3 * 4 * Copyright (C) 2005 SAN People 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 * 11 */ 12 13 #include <linux/module.h> 14 15 #include <asm/irq.h> 16 #include <asm/mach/arch.h> 17 #include <asm/mach/map.h> 18 #include <asm/system_misc.h> 19 #include <mach/at91rm9200.h> 20 #include <mach/at91_aic.h> 21 #include <mach/at91_pmc.h> 22 #include <mach/at91_st.h> 23 #include <mach/cpu.h> 24 25 #include "soc.h" 26 #include "generic.h" 27 #include "clock.h" 28 #include "sam9_smc.h" 29 30 /* -------------------------------------------------------------------- 31 * Clocks 32 * -------------------------------------------------------------------- */ 33 34 /* 35 * The peripheral clocks. 36 */ 37 static struct clk udc_clk = { 38 .name = "udc_clk", 39 .pmc_mask = 1 << AT91RM9200_ID_UDP, 40 .type = CLK_TYPE_PERIPHERAL, 41 }; 42 static struct clk ohci_clk = { 43 .name = "ohci_clk", 44 .pmc_mask = 1 << AT91RM9200_ID_UHP, 45 .type = CLK_TYPE_PERIPHERAL, 46 }; 47 static struct clk ether_clk = { 48 .name = "ether_clk", 49 .pmc_mask = 1 << AT91RM9200_ID_EMAC, 50 .type = CLK_TYPE_PERIPHERAL, 51 }; 52 static struct clk mmc_clk = { 53 .name = "mci_clk", 54 .pmc_mask = 1 << AT91RM9200_ID_MCI, 55 .type = CLK_TYPE_PERIPHERAL, 56 }; 57 static struct clk twi_clk = { 58 .name = "twi_clk", 59 .pmc_mask = 1 << AT91RM9200_ID_TWI, 60 .type = CLK_TYPE_PERIPHERAL, 61 }; 62 static struct clk usart0_clk = { 63 .name = "usart0_clk", 64 .pmc_mask = 1 << AT91RM9200_ID_US0, 65 .type = CLK_TYPE_PERIPHERAL, 66 }; 67 static struct clk usart1_clk = { 68 .name = "usart1_clk", 69 .pmc_mask = 1 << AT91RM9200_ID_US1, 70 .type = CLK_TYPE_PERIPHERAL, 71 }; 72 static struct clk usart2_clk = { 73 .name = "usart2_clk", 74 .pmc_mask = 1 << AT91RM9200_ID_US2, 75 .type = CLK_TYPE_PERIPHERAL, 76 }; 77 static struct clk usart3_clk = { 78 .name = "usart3_clk", 79 .pmc_mask = 1 << AT91RM9200_ID_US3, 80 .type = CLK_TYPE_PERIPHERAL, 81 }; 82 static struct clk spi_clk = { 83 .name = "spi_clk", 84 .pmc_mask = 1 << AT91RM9200_ID_SPI, 85 .type = CLK_TYPE_PERIPHERAL, 86 }; 87 static struct clk pioA_clk = { 88 .name = "pioA_clk", 89 .pmc_mask = 1 << AT91RM9200_ID_PIOA, 90 .type = CLK_TYPE_PERIPHERAL, 91 }; 92 static struct clk pioB_clk = { 93 .name = "pioB_clk", 94 .pmc_mask = 1 << AT91RM9200_ID_PIOB, 95 .type = CLK_TYPE_PERIPHERAL, 96 }; 97 static struct clk pioC_clk = { 98 .name = "pioC_clk", 99 .pmc_mask = 1 << AT91RM9200_ID_PIOC, 100 .type = CLK_TYPE_PERIPHERAL, 101 }; 102 static struct clk pioD_clk = { 103 .name = "pioD_clk", 104 .pmc_mask = 1 << AT91RM9200_ID_PIOD, 105 .type = CLK_TYPE_PERIPHERAL, 106 }; 107 static struct clk ssc0_clk = { 108 .name = "ssc0_clk", 109 .pmc_mask = 1 << AT91RM9200_ID_SSC0, 110 .type = CLK_TYPE_PERIPHERAL, 111 }; 112 static struct clk ssc1_clk = { 113 .name = "ssc1_clk", 114 .pmc_mask = 1 << AT91RM9200_ID_SSC1, 115 .type = CLK_TYPE_PERIPHERAL, 116 }; 117 static struct clk ssc2_clk = { 118 .name = "ssc2_clk", 119 .pmc_mask = 1 << AT91RM9200_ID_SSC2, 120 .type = CLK_TYPE_PERIPHERAL, 121 }; 122 static struct clk tc0_clk = { 123 .name = "tc0_clk", 124 .pmc_mask = 1 << AT91RM9200_ID_TC0, 125 .type = CLK_TYPE_PERIPHERAL, 126 }; 127 static struct clk tc1_clk = { 128 .name = "tc1_clk", 129 .pmc_mask = 1 << AT91RM9200_ID_TC1, 130 .type = CLK_TYPE_PERIPHERAL, 131 }; 132 static struct clk tc2_clk = { 133 .name = "tc2_clk", 134 .pmc_mask = 1 << AT91RM9200_ID_TC2, 135 .type = CLK_TYPE_PERIPHERAL, 136 }; 137 static struct clk tc3_clk = { 138 .name = "tc3_clk", 139 .pmc_mask = 1 << AT91RM9200_ID_TC3, 140 .type = CLK_TYPE_PERIPHERAL, 141 }; 142 static struct clk tc4_clk = { 143 .name = "tc4_clk", 144 .pmc_mask = 1 << AT91RM9200_ID_TC4, 145 .type = CLK_TYPE_PERIPHERAL, 146 }; 147 static struct clk tc5_clk = { 148 .name = "tc5_clk", 149 .pmc_mask = 1 << AT91RM9200_ID_TC5, 150 .type = CLK_TYPE_PERIPHERAL, 151 }; 152 153 static struct clk *periph_clocks[] __initdata = { 154 &pioA_clk, 155 &pioB_clk, 156 &pioC_clk, 157 &pioD_clk, 158 &usart0_clk, 159 &usart1_clk, 160 &usart2_clk, 161 &usart3_clk, 162 &mmc_clk, 163 &udc_clk, 164 &twi_clk, 165 &spi_clk, 166 &ssc0_clk, 167 &ssc1_clk, 168 &ssc2_clk, 169 &tc0_clk, 170 &tc1_clk, 171 &tc2_clk, 172 &tc3_clk, 173 &tc4_clk, 174 &tc5_clk, 175 &ohci_clk, 176 ðer_clk, 177 // irq0 .. irq6 178 }; 179 180 static struct clk_lookup periph_clocks_lookups[] = { 181 CLKDEV_CON_DEV_ID("t0_clk", "atmel_tcb.0", &tc0_clk), 182 CLKDEV_CON_DEV_ID("t1_clk", "atmel_tcb.0", &tc1_clk), 183 CLKDEV_CON_DEV_ID("t2_clk", "atmel_tcb.0", &tc2_clk), 184 CLKDEV_CON_DEV_ID("t0_clk", "atmel_tcb.1", &tc3_clk), 185 CLKDEV_CON_DEV_ID("t1_clk", "atmel_tcb.1", &tc4_clk), 186 CLKDEV_CON_DEV_ID("t2_clk", "atmel_tcb.1", &tc5_clk), 187 CLKDEV_CON_DEV_ID("pclk", "at91rm9200_ssc.0", &ssc0_clk), 188 CLKDEV_CON_DEV_ID("pclk", "at91rm9200_ssc.1", &ssc1_clk), 189 CLKDEV_CON_DEV_ID("pclk", "at91rm9200_ssc.2", &ssc2_clk), 190 CLKDEV_CON_DEV_ID("pclk", "fffd0000.ssc", &ssc0_clk), 191 CLKDEV_CON_DEV_ID("pclk", "fffd4000.ssc", &ssc1_clk), 192 CLKDEV_CON_DEV_ID("pclk", "fffd8000.ssc", &ssc2_clk), 193 CLKDEV_CON_DEV_ID(NULL, "i2c-at91rm9200.0", &twi_clk), 194 /* fake hclk clock */ 195 CLKDEV_CON_DEV_ID("hclk", "at91_ohci", &ohci_clk), 196 CLKDEV_CON_ID("pioA", &pioA_clk), 197 CLKDEV_CON_ID("pioB", &pioB_clk), 198 CLKDEV_CON_ID("pioC", &pioC_clk), 199 CLKDEV_CON_ID("pioD", &pioD_clk), 200 }; 201 202 static struct clk_lookup usart_clocks_lookups[] = { 203 CLKDEV_CON_DEV_ID("usart", "atmel_usart.0", &mck), 204 CLKDEV_CON_DEV_ID("usart", "atmel_usart.1", &usart0_clk), 205 CLKDEV_CON_DEV_ID("usart", "atmel_usart.2", &usart1_clk), 206 CLKDEV_CON_DEV_ID("usart", "atmel_usart.3", &usart2_clk), 207 CLKDEV_CON_DEV_ID("usart", "atmel_usart.4", &usart3_clk), 208 }; 209 210 /* 211 * The four programmable clocks. 212 * You must configure pin multiplexing to bring these signals out. 213 */ 214 static struct clk pck0 = { 215 .name = "pck0", 216 .pmc_mask = AT91_PMC_PCK0, 217 .type = CLK_TYPE_PROGRAMMABLE, 218 .id = 0, 219 }; 220 static struct clk pck1 = { 221 .name = "pck1", 222 .pmc_mask = AT91_PMC_PCK1, 223 .type = CLK_TYPE_PROGRAMMABLE, 224 .id = 1, 225 }; 226 static struct clk pck2 = { 227 .name = "pck2", 228 .pmc_mask = AT91_PMC_PCK2, 229 .type = CLK_TYPE_PROGRAMMABLE, 230 .id = 2, 231 }; 232 static struct clk pck3 = { 233 .name = "pck3", 234 .pmc_mask = AT91_PMC_PCK3, 235 .type = CLK_TYPE_PROGRAMMABLE, 236 .id = 3, 237 }; 238 239 static void __init at91rm9200_register_clocks(void) 240 { 241 int i; 242 243 for (i = 0; i < ARRAY_SIZE(periph_clocks); i++) 244 clk_register(periph_clocks[i]); 245 246 clkdev_add_table(periph_clocks_lookups, 247 ARRAY_SIZE(periph_clocks_lookups)); 248 clkdev_add_table(usart_clocks_lookups, 249 ARRAY_SIZE(usart_clocks_lookups)); 250 251 clk_register(&pck0); 252 clk_register(&pck1); 253 clk_register(&pck2); 254 clk_register(&pck3); 255 } 256 257 /* -------------------------------------------------------------------- 258 * GPIO 259 * -------------------------------------------------------------------- */ 260 261 static struct at91_gpio_bank at91rm9200_gpio[] __initdata = { 262 { 263 .id = AT91RM9200_ID_PIOA, 264 .regbase = AT91RM9200_BASE_PIOA, 265 }, { 266 .id = AT91RM9200_ID_PIOB, 267 .regbase = AT91RM9200_BASE_PIOB, 268 }, { 269 .id = AT91RM9200_ID_PIOC, 270 .regbase = AT91RM9200_BASE_PIOC, 271 }, { 272 .id = AT91RM9200_ID_PIOD, 273 .regbase = AT91RM9200_BASE_PIOD, 274 } 275 }; 276 277 static void at91rm9200_idle(void) 278 { 279 /* 280 * Disable the processor clock. The processor will be automatically 281 * re-enabled by an interrupt or by a reset. 282 */ 283 at91_pmc_write(AT91_PMC_SCDR, AT91_PMC_PCK); 284 } 285 286 static void at91rm9200_restart(char mode, const char *cmd) 287 { 288 /* 289 * Perform a hardware reset with the use of the Watchdog timer. 290 */ 291 at91_st_write(AT91_ST_WDMR, AT91_ST_RSTEN | AT91_ST_EXTEN | 1); 292 at91_st_write(AT91_ST_CR, AT91_ST_WDRST); 293 } 294 295 /* -------------------------------------------------------------------- 296 * AT91RM9200 processor initialization 297 * -------------------------------------------------------------------- */ 298 static void __init at91rm9200_map_io(void) 299 { 300 /* Map peripherals */ 301 at91_init_sram(0, AT91RM9200_SRAM_BASE, AT91RM9200_SRAM_SIZE); 302 } 303 304 static void __init at91rm9200_ioremap_registers(void) 305 { 306 at91rm9200_ioremap_st(AT91RM9200_BASE_ST); 307 at91_ioremap_ramc(0, AT91RM9200_BASE_MC, 256); 308 } 309 310 static void __init at91rm9200_initialize(void) 311 { 312 arm_pm_idle = at91rm9200_idle; 313 arm_pm_restart = at91rm9200_restart; 314 at91_extern_irq = (1 << AT91RM9200_ID_IRQ0) | (1 << AT91RM9200_ID_IRQ1) 315 | (1 << AT91RM9200_ID_IRQ2) | (1 << AT91RM9200_ID_IRQ3) 316 | (1 << AT91RM9200_ID_IRQ4) | (1 << AT91RM9200_ID_IRQ5) 317 | (1 << AT91RM9200_ID_IRQ6); 318 319 /* Initialize GPIO subsystem */ 320 at91_gpio_init(at91rm9200_gpio, 321 cpu_is_at91rm9200_bga() ? AT91RM9200_BGA : AT91RM9200_PQFP); 322 } 323 324 325 /* -------------------------------------------------------------------- 326 * Interrupt initialization 327 * -------------------------------------------------------------------- */ 328 329 /* 330 * The default interrupt priority levels (0 = lowest, 7 = highest). 331 */ 332 static unsigned int at91rm9200_default_irq_priority[NR_AIC_IRQS] __initdata = { 333 7, /* Advanced Interrupt Controller (FIQ) */ 334 7, /* System Peripherals */ 335 1, /* Parallel IO Controller A */ 336 1, /* Parallel IO Controller B */ 337 1, /* Parallel IO Controller C */ 338 1, /* Parallel IO Controller D */ 339 5, /* USART 0 */ 340 5, /* USART 1 */ 341 5, /* USART 2 */ 342 5, /* USART 3 */ 343 0, /* Multimedia Card Interface */ 344 2, /* USB Device Port */ 345 6, /* Two-Wire Interface */ 346 5, /* Serial Peripheral Interface */ 347 4, /* Serial Synchronous Controller 0 */ 348 4, /* Serial Synchronous Controller 1 */ 349 4, /* Serial Synchronous Controller 2 */ 350 0, /* Timer Counter 0 */ 351 0, /* Timer Counter 1 */ 352 0, /* Timer Counter 2 */ 353 0, /* Timer Counter 3 */ 354 0, /* Timer Counter 4 */ 355 0, /* Timer Counter 5 */ 356 2, /* USB Host port */ 357 3, /* Ethernet MAC */ 358 0, /* Advanced Interrupt Controller (IRQ0) */ 359 0, /* Advanced Interrupt Controller (IRQ1) */ 360 0, /* Advanced Interrupt Controller (IRQ2) */ 361 0, /* Advanced Interrupt Controller (IRQ3) */ 362 0, /* Advanced Interrupt Controller (IRQ4) */ 363 0, /* Advanced Interrupt Controller (IRQ5) */ 364 0 /* Advanced Interrupt Controller (IRQ6) */ 365 }; 366 367 struct at91_init_soc __initdata at91rm9200_soc = { 368 .map_io = at91rm9200_map_io, 369 .default_irq_priority = at91rm9200_default_irq_priority, 370 .ioremap_registers = at91rm9200_ioremap_registers, 371 .register_clocks = at91rm9200_register_clocks, 372 .init = at91rm9200_initialize, 373 }; 374