arch/arm/mach-at91/at91sam9g45.c

   1 /*
   2  *  Chip-specific setup code for the AT91SAM9G45 family
   3  *
   4  *  Copyright (C) 2009 Atmel Corporation.
   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 #include <linux/pm.h>
  15
  16 #include <asm/irq.h>
  17 #include <asm/mach/arch.h>
  18 #include <asm/mach/map.h>
  19 #include <mach/at91sam9g45.h>
  20 #include <mach/at91_pmc.h>
  21 #include <mach/at91_rstc.h>
  22 #include <mach/at91_shdwc.h>
  23 #include <mach/cpu.h>
  24
  25 #include "soc.h"
  26 #include "generic.h"
  27 #include "clock.h"
  28
  29 static struct map_desc at91sam9g45_sram_desc[] __initdata = {
  30         {
  31                 .virtual        = AT91_IO_VIRT_BASE - AT91SAM9G45_SRAM_SIZE,
  32                 .pfn            = __phys_to_pfn(AT91SAM9G45_SRAM_BASE),
  33                 .length         = AT91SAM9G45_SRAM_SIZE,
  34                 .type           = MT_DEVICE,
  35         }
  36 };
  37
  38 /* --------------------------------------------------------------------
  39  *  Clocks
  40  * -------------------------------------------------------------------- */
  41
  42 /*
  43  * The peripheral clocks.
  44  */
  45 static struct clk pioA_clk = {
  46         .name           = "pioA_clk",
  47         .pmc_mask       = 1 << AT91SAM9G45_ID_PIOA,
  48         .type           = CLK_TYPE_PERIPHERAL,
  49 };
  50 static struct clk pioB_clk = {
  51         .name           = "pioB_clk",
  52         .pmc_mask       = 1 << AT91SAM9G45_ID_PIOB,
  53         .type           = CLK_TYPE_PERIPHERAL,
  54 };
  55 static struct clk pioC_clk = {
  56         .name           = "pioC_clk",
  57         .pmc_mask       = 1 << AT91SAM9G45_ID_PIOC,
  58         .type           = CLK_TYPE_PERIPHERAL,
  59 };
  60 static struct clk pioDE_clk = {
  61         .name           = "pioDE_clk",
  62         .pmc_mask       = 1 << AT91SAM9G45_ID_PIODE,
  63         .type           = CLK_TYPE_PERIPHERAL,
  64 };
  65 static struct clk usart0_clk = {
  66         .name           = "usart0_clk",
  67         .pmc_mask       = 1 << AT91SAM9G45_ID_US0,
  68         .type           = CLK_TYPE_PERIPHERAL,
  69 };
  70 static struct clk usart1_clk = {
  71         .name           = "usart1_clk",
  72         .pmc_mask       = 1 << AT91SAM9G45_ID_US1,
  73         .type           = CLK_TYPE_PERIPHERAL,
  74 };
  75 static struct clk usart2_clk = {
  76         .name           = "usart2_clk",
  77         .pmc_mask       = 1 << AT91SAM9G45_ID_US2,
  78         .type           = CLK_TYPE_PERIPHERAL,
  79 };
  80 static struct clk usart3_clk = {
  81         .name           = "usart3_clk",
  82         .pmc_mask       = 1 << AT91SAM9G45_ID_US3,
  83         .type           = CLK_TYPE_PERIPHERAL,
  84 };
  85 static struct clk mmc0_clk = {
  86         .name           = "mci0_clk",
  87         .pmc_mask       = 1 << AT91SAM9G45_ID_MCI0,
  88         .type           = CLK_TYPE_PERIPHERAL,
  89 };
  90 static struct clk twi0_clk = {
  91         .name           = "twi0_clk",
  92         .pmc_mask       = 1 << AT91SAM9G45_ID_TWI0,
  93         .type           = CLK_TYPE_PERIPHERAL,
  94 };
  95 static struct clk twi1_clk = {
  96         .name           = "twi1_clk",
  97         .pmc_mask       = 1 << AT91SAM9G45_ID_TWI1,
  98         .type           = CLK_TYPE_PERIPHERAL,
  99 };
 100 static struct clk spi0_clk = {
 101         .name           = "spi0_clk",
 102         .pmc_mask       = 1 << AT91SAM9G45_ID_SPI0,
 103         .type           = CLK_TYPE_PERIPHERAL,
 104 };
 105 static struct clk spi1_clk = {
 106         .name           = "spi1_clk",
 107         .pmc_mask       = 1 << AT91SAM9G45_ID_SPI1,
 108         .type           = CLK_TYPE_PERIPHERAL,
 109 };
 110 static struct clk ssc0_clk = {
 111         .name           = "ssc0_clk",
 112         .pmc_mask       = 1 << AT91SAM9G45_ID_SSC0,
 113         .type           = CLK_TYPE_PERIPHERAL,
 114 };
 115 static struct clk ssc1_clk = {
 116         .name           = "ssc1_clk",
 117         .pmc_mask       = 1 << AT91SAM9G45_ID_SSC1,
 118         .type           = CLK_TYPE_PERIPHERAL,
 119 };
 120 static struct clk tcb0_clk = {
 121         .name           = "tcb0_clk",
 122         .pmc_mask       = 1 << AT91SAM9G45_ID_TCB,
 123         .type           = CLK_TYPE_PERIPHERAL,
 124 };
 125 static struct clk pwm_clk = {
 126         .name           = "pwm_clk",
 127         .pmc_mask       = 1 << AT91SAM9G45_ID_PWMC,
 128         .type           = CLK_TYPE_PERIPHERAL,
 129 };
 130 static struct clk tsc_clk = {
 131         .name           = "tsc_clk",
 132         .pmc_mask       = 1 << AT91SAM9G45_ID_TSC,
 133         .type           = CLK_TYPE_PERIPHERAL,
 134 };
 135 static struct clk dma_clk = {
 136         .name           = "dma_clk",
 137         .pmc_mask       = 1 << AT91SAM9G45_ID_DMA,
 138         .type           = CLK_TYPE_PERIPHERAL,
 139 };
 140 static struct clk uhphs_clk = {
 141         .name           = "uhphs_clk",
 142         .pmc_mask       = 1 << AT91SAM9G45_ID_UHPHS,
 143         .type           = CLK_TYPE_PERIPHERAL,
 144 };
 145 static struct clk lcdc_clk = {
 146         .name           = "lcdc_clk",
 147         .pmc_mask       = 1 << AT91SAM9G45_ID_LCDC,
 148         .type           = CLK_TYPE_PERIPHERAL,
 149 };
 150 static struct clk ac97_clk = {
 151         .name           = "ac97_clk",
 152         .pmc_mask       = 1 << AT91SAM9G45_ID_AC97C,
 153         .type           = CLK_TYPE_PERIPHERAL,
 154 };
 155 static struct clk macb_clk = {
 156         .name           = "macb_clk",
 157         .pmc_mask       = 1 << AT91SAM9G45_ID_EMAC,
 158         .type           = CLK_TYPE_PERIPHERAL,
 159 };
 160 static struct clk isi_clk = {
 161         .name           = "isi_clk",
 162         .pmc_mask       = 1 << AT91SAM9G45_ID_ISI,
 163         .type           = CLK_TYPE_PERIPHERAL,
 164 };
 165 static struct clk udphs_clk = {
 166         .name           = "udphs_clk",
 167         .pmc_mask       = 1 << AT91SAM9G45_ID_UDPHS,
 168         .type           = CLK_TYPE_PERIPHERAL,
 169 };
 170 static struct clk mmc1_clk = {
 171         .name           = "mci1_clk",
 172         .pmc_mask       = 1 << AT91SAM9G45_ID_MCI1,
 173         .type           = CLK_TYPE_PERIPHERAL,
 174 };
 175
 176 /* Video decoder clock - Only for sam9m10/sam9m11 */
 177 static struct clk vdec_clk = {
 178         .name           = "vdec_clk",
 179         .pmc_mask       = 1 << AT91SAM9G45_ID_VDEC,
 180         .type           = CLK_TYPE_PERIPHERAL,
 181 };
 182
 183 static struct clk *periph_clocks[] __initdata = {
 184         &pioA_clk,
 185         &pioB_clk,
 186         &pioC_clk,
 187         &pioDE_clk,
 188         &usart0_clk,
 189         &usart1_clk,
 190         &usart2_clk,
 191         &usart3_clk,
 192         &mmc0_clk,
 193         &twi0_clk,
 194         &twi1_clk,
 195         &spi0_clk,
 196         &spi1_clk,
 197         &ssc0_clk,
 198         &ssc1_clk,
 199         &tcb0_clk,
 200         &pwm_clk,
 201         &tsc_clk,
 202         &dma_clk,
 203         &uhphs_clk,
 204         &lcdc_clk,
 205         &ac97_clk,
 206         &macb_clk,
 207         &isi_clk,
 208         &udphs_clk,
 209         &mmc1_clk,
 210         // irq0
 211 };
 212
 213 static struct clk_lookup periph_clocks_lookups[] = {
 214         /* One additional fake clock for ohci */
 215         CLKDEV_CON_ID("ohci_clk", &uhphs_clk),
 216         CLKDEV_CON_DEV_ID("ehci_clk", "atmel-ehci", &uhphs_clk),
 217         CLKDEV_CON_DEV_ID("hclk", "atmel_usba_udc", &utmi_clk),
 218         CLKDEV_CON_DEV_ID("pclk", "atmel_usba_udc", &udphs_clk),
 219         CLKDEV_CON_DEV_ID("mci_clk", "atmel_mci.0", &mmc0_clk),
 220         CLKDEV_CON_DEV_ID("mci_clk", "atmel_mci.1", &mmc1_clk),
 221         CLKDEV_CON_DEV_ID("spi_clk", "atmel_spi.0", &spi0_clk),
 222         CLKDEV_CON_DEV_ID("spi_clk", "atmel_spi.1", &spi1_clk),
 223         CLKDEV_CON_DEV_ID("t0_clk", "atmel_tcb.0", &tcb0_clk),
 224         CLKDEV_CON_DEV_ID("t0_clk", "atmel_tcb.1", &tcb0_clk),
 225         CLKDEV_CON_DEV_ID("pclk", "ssc.0", &ssc0_clk),
 226         CLKDEV_CON_DEV_ID("pclk", "ssc.1", &ssc1_clk),
 227 };
 228
 229 static struct clk_lookup usart_clocks_lookups[] = {
 230         CLKDEV_CON_DEV_ID("usart", "atmel_usart.0", &mck),
 231         CLKDEV_CON_DEV_ID("usart", "atmel_usart.1", &usart0_clk),
 232         CLKDEV_CON_DEV_ID("usart", "atmel_usart.2", &usart1_clk),
 233         CLKDEV_CON_DEV_ID("usart", "atmel_usart.3", &usart2_clk),
 234         CLKDEV_CON_DEV_ID("usart", "atmel_usart.4", &usart3_clk),
 235 };
 236
 237 /*
 238  * The two programmable clocks.
 239  * You must configure pin multiplexing to bring these signals out.
 240  */
 241 static struct clk pck0 = {
 242         .name           = "pck0",
 243         .pmc_mask       = AT91_PMC_PCK0,
 244         .type           = CLK_TYPE_PROGRAMMABLE,
 245         .id             = 0,
 246 };
 247 static struct clk pck1 = {
 248         .name           = "pck1",
 249         .pmc_mask       = AT91_PMC_PCK1,
 250         .type           = CLK_TYPE_PROGRAMMABLE,
 251         .id             = 1,
 252 };
 253
 254 static void __init at91sam9g45_register_clocks(void)
 255 {
 256         int i;
 257
 258         for (i = 0; i < ARRAY_SIZE(periph_clocks); i++)
 259                 clk_register(periph_clocks[i]);
 260
 261         clkdev_add_table(periph_clocks_lookups,
 262                          ARRAY_SIZE(periph_clocks_lookups));
 263         clkdev_add_table(usart_clocks_lookups,
 264                          ARRAY_SIZE(usart_clocks_lookups));
 265
 266         if (cpu_is_at91sam9m10() || cpu_is_at91sam9m11())
 267                 clk_register(&vdec_clk);
 268
 269         clk_register(&pck0);
 270         clk_register(&pck1);
 271 }
 272
 273 static struct clk_lookup console_clock_lookup;
 274
 275 void __init at91sam9g45_set_console_clock(int id)
 276 {
 277         if (id >= ARRAY_SIZE(usart_clocks_lookups))
 278                 return;
 279
 280         console_clock_lookup.con_id = "usart";
 281         console_clock_lookup.clk = usart_clocks_lookups[id].clk;
 282         clkdev_add(&console_clock_lookup);
 283 }
 284
 285 /* --------------------------------------------------------------------
 286  *  GPIO
 287  * -------------------------------------------------------------------- */
 288
 289 static struct at91_gpio_bank at91sam9g45_gpio[] = {
 290         {
 291                 .id             = AT91SAM9G45_ID_PIOA,
 292                 .offset         = AT91_PIOA,
 293                 .clock          = &pioA_clk,
 294         }, {
 295                 .id             = AT91SAM9G45_ID_PIOB,
 296                 .offset         = AT91_PIOB,
 297                 .clock          = &pioB_clk,
 298         }, {
 299                 .id             = AT91SAM9G45_ID_PIOC,
 300                 .offset         = AT91_PIOC,
 301                 .clock          = &pioC_clk,
 302         }, {
 303                 .id             = AT91SAM9G45_ID_PIODE,
 304                 .offset         = AT91_PIOD,
 305                 .clock          = &pioDE_clk,
 306         }, {
 307                 .id             = AT91SAM9G45_ID_PIODE,
 308                 .offset         = AT91_PIOE,
 309                 .clock          = &pioDE_clk,
 310         }
 311 };
 312
 313 static void at91sam9g45_reset(void)
 314 {
 315         at91_sys_write(AT91_RSTC_CR, AT91_RSTC_KEY | AT91_RSTC_PROCRST | AT91_RSTC_PERRST);
 316 }
 317
 318 static void at91sam9g45_poweroff(void)
 319 {
 320         at91_sys_write(AT91_SHDW_CR, AT91_SHDW_KEY | AT91_SHDW_SHDW);
 321 }
 322
 323
 324 /* --------------------------------------------------------------------
 325  *  AT91SAM9G45 processor initialization
 326  * -------------------------------------------------------------------- */
 327
 328 static void __init at91sam9g45_map_io(void)
 329 {
 330         iotable_init(at91sam9g45_sram_desc, ARRAY_SIZE(at91sam9g45_sram_desc));
 331 }
 332
 333 static void __init at91sam9g45_initialize(unsigned long main_clock)
 334 {
 335         at91_arch_reset = at91sam9g45_reset;
 336         pm_power_off = at91sam9g45_poweroff;
 337         at91_extern_irq = (1 << AT91SAM9G45_ID_IRQ0);
 338
 339         /* Init clock subsystem */
 340         at91_clock_init(main_clock);
 341
 342         /* Register the processor-specific clocks */
 343         at91sam9g45_register_clocks();
 344
 345         /* Register GPIO subsystem */
 346         at91_gpio_init(at91sam9g45_gpio, 5);
 347 }
 348
 349 /* --------------------------------------------------------------------
 350  *  Interrupt initialization
 351  * -------------------------------------------------------------------- */
 352
 353 /*
 354  * The default interrupt priority levels (0 = lowest, 7 = highest).
 355  */
 356 static unsigned int at91sam9g45_default_irq_priority[NR_AIC_IRQS] __initdata = {
 357         7,      /* Advanced Interrupt Controller (FIQ) */
 358         7,      /* System Peripherals */
 359         1,      /* Parallel IO Controller A */
 360         1,      /* Parallel IO Controller B */
 361         1,      /* Parallel IO Controller C */
 362         1,      /* Parallel IO Controller D and E */
 363         0,
 364         5,      /* USART 0 */
 365         5,      /* USART 1 */
 366         5,      /* USART 2 */
 367         5,      /* USART 3 */
 368         0,      /* Multimedia Card Interface 0 */
 369         6,      /* Two-Wire Interface 0 */
 370         6,      /* Two-Wire Interface 1 */
 371         5,      /* Serial Peripheral Interface 0 */
 372         5,      /* Serial Peripheral Interface 1 */
 373         4,      /* Serial Synchronous Controller 0 */
 374         4,      /* Serial Synchronous Controller 1 */
 375         0,      /* Timer Counter 0, 1, 2, 3, 4 and 5 */
 376         0,      /* Pulse Width Modulation Controller */
 377         0,      /* Touch Screen Controller */
 378         0,      /* DMA Controller */
 379         2,      /* USB Host High Speed port */
 380         3,      /* LDC Controller */
 381         5,      /* AC97 Controller */
 382         3,      /* Ethernet */
 383         0,      /* Image Sensor Interface */
 384         2,      /* USB Device High speed port */
 385         0,
 386         0,      /* Multimedia Card Interface 1 */
 387         0,
 388         0,      /* Advanced Interrupt Controller (IRQ0) */
 389 };
 390
 391 void __init at91sam9g45_init_interrupts(unsigned int priority[NR_AIC_IRQS])
 392 {
 393         if (!priority)
 394                 priority = at91sam9g45_default_irq_priority;
 395
 396         /* Initialize the AIC interrupt controller */
 397         at91_aic_init(priority);
 398
 399         /* Enable GPIO interrupts */
 400         at91_gpio_irq_setup();
 401 }
 402
 403 struct at91_soc __initdata at91sam9g45_soc = {
 404         .map_io = at91sam9g45_map_io,
 405         .init = at91sam9g45_initialize,
 406 };