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/dma-mapping.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/cpu.h>
  23
  24 #include "soc.h"
  25 #include "generic.h"
  26 #include "clock.h"
  27 #include "sam9_smc.h"
  28
  29 /* --------------------------------------------------------------------
  30  *  Clocks
  31  * -------------------------------------------------------------------- */
  32
  33 /*
  34  * The peripheral clocks.
  35  */
  36 static struct clk pioA_clk = {
  37         .name           = "pioA_clk",
  38         .pmc_mask       = 1 << AT91SAM9G45_ID_PIOA,
  39         .type           = CLK_TYPE_PERIPHERAL,
  40 };
  41 static struct clk pioB_clk = {
  42         .name           = "pioB_clk",
  43         .pmc_mask       = 1 << AT91SAM9G45_ID_PIOB,
  44         .type           = CLK_TYPE_PERIPHERAL,
  45 };
  46 static struct clk pioC_clk = {
  47         .name           = "pioC_clk",
  48         .pmc_mask       = 1 << AT91SAM9G45_ID_PIOC,
  49         .type           = CLK_TYPE_PERIPHERAL,
  50 };
  51 static struct clk pioDE_clk = {
  52         .name           = "pioDE_clk",
  53         .pmc_mask       = 1 << AT91SAM9G45_ID_PIODE,
  54         .type           = CLK_TYPE_PERIPHERAL,
  55 };
  56 static struct clk trng_clk = {
  57         .name           = "trng_clk",
  58         .pmc_mask       = 1 << AT91SAM9G45_ID_TRNG,
  59         .type           = CLK_TYPE_PERIPHERAL,
  60 };
  61 static struct clk usart0_clk = {
  62         .name           = "usart0_clk",
  63         .pmc_mask       = 1 << AT91SAM9G45_ID_US0,
  64         .type           = CLK_TYPE_PERIPHERAL,
  65 };
  66 static struct clk usart1_clk = {
  67         .name           = "usart1_clk",
  68         .pmc_mask       = 1 << AT91SAM9G45_ID_US1,
  69         .type           = CLK_TYPE_PERIPHERAL,
  70 };
  71 static struct clk usart2_clk = {
  72         .name           = "usart2_clk",
  73         .pmc_mask       = 1 << AT91SAM9G45_ID_US2,
  74         .type           = CLK_TYPE_PERIPHERAL,
  75 };
  76 static struct clk usart3_clk = {
  77         .name           = "usart3_clk",
  78         .pmc_mask       = 1 << AT91SAM9G45_ID_US3,
  79         .type           = CLK_TYPE_PERIPHERAL,
  80 };
  81 static struct clk mmc0_clk = {
  82         .name           = "mci0_clk",
  83         .pmc_mask       = 1 << AT91SAM9G45_ID_MCI0,
  84         .type           = CLK_TYPE_PERIPHERAL,
  85 };
  86 static struct clk twi0_clk = {
  87         .name           = "twi0_clk",
  88         .pmc_mask       = 1 << AT91SAM9G45_ID_TWI0,
  89         .type           = CLK_TYPE_PERIPHERAL,
  90 };
  91 static struct clk twi1_clk = {
  92         .name           = "twi1_clk",
  93         .pmc_mask       = 1 << AT91SAM9G45_ID_TWI1,
  94         .type           = CLK_TYPE_PERIPHERAL,
  95 };
  96 static struct clk spi0_clk = {
  97         .name           = "spi0_clk",
  98         .pmc_mask       = 1 << AT91SAM9G45_ID_SPI0,
  99         .type           = CLK_TYPE_PERIPHERAL,
 100 };
 101 static struct clk spi1_clk = {
 102         .name           = "spi1_clk",
 103         .pmc_mask       = 1 << AT91SAM9G45_ID_SPI1,
 104         .type           = CLK_TYPE_PERIPHERAL,
 105 };
 106 static struct clk ssc0_clk = {
 107         .name           = "ssc0_clk",
 108         .pmc_mask       = 1 << AT91SAM9G45_ID_SSC0,
 109         .type           = CLK_TYPE_PERIPHERAL,
 110 };
 111 static struct clk ssc1_clk = {
 112         .name           = "ssc1_clk",
 113         .pmc_mask       = 1 << AT91SAM9G45_ID_SSC1,
 114         .type           = CLK_TYPE_PERIPHERAL,
 115 };
 116 static struct clk tcb0_clk = {
 117         .name           = "tcb0_clk",
 118         .pmc_mask       = 1 << AT91SAM9G45_ID_TCB,
 119         .type           = CLK_TYPE_PERIPHERAL,
 120 };
 121 static struct clk pwm_clk = {
 122         .name           = "pwm_clk",
 123         .pmc_mask       = 1 << AT91SAM9G45_ID_PWMC,
 124         .type           = CLK_TYPE_PERIPHERAL,
 125 };
 126 static struct clk tsc_clk = {
 127         .name           = "tsc_clk",
 128         .pmc_mask       = 1 << AT91SAM9G45_ID_TSC,
 129         .type           = CLK_TYPE_PERIPHERAL,
 130 };
 131 static struct clk dma_clk = {
 132         .name           = "dma_clk",
 133         .pmc_mask       = 1 << AT91SAM9G45_ID_DMA,
 134         .type           = CLK_TYPE_PERIPHERAL,
 135 };
 136 static struct clk uhphs_clk = {
 137         .name           = "uhphs_clk",
 138         .pmc_mask       = 1 << AT91SAM9G45_ID_UHPHS,
 139         .type           = CLK_TYPE_PERIPHERAL,
 140 };
 141 static struct clk lcdc_clk = {
 142         .name           = "lcdc_clk",
 143         .pmc_mask       = 1 << AT91SAM9G45_ID_LCDC,
 144         .type           = CLK_TYPE_PERIPHERAL,
 145 };
 146 static struct clk ac97_clk = {
 147         .name           = "ac97_clk",
 148         .pmc_mask       = 1 << AT91SAM9G45_ID_AC97C,
 149         .type           = CLK_TYPE_PERIPHERAL,
 150 };
 151 static struct clk macb_clk = {
 152         .name           = "pclk",
 153         .pmc_mask       = 1 << AT91SAM9G45_ID_EMAC,
 154         .type           = CLK_TYPE_PERIPHERAL,
 155 };
 156 static struct clk isi_clk = {
 157         .name           = "isi_clk",
 158         .pmc_mask       = 1 << AT91SAM9G45_ID_ISI,
 159         .type           = CLK_TYPE_PERIPHERAL,
 160 };
 161 static struct clk udphs_clk = {
 162         .name           = "udphs_clk",
 163         .pmc_mask       = 1 << AT91SAM9G45_ID_UDPHS,
 164         .type           = CLK_TYPE_PERIPHERAL,
 165 };
 166 static struct clk mmc1_clk = {
 167         .name           = "mci1_clk",
 168         .pmc_mask       = 1 << AT91SAM9G45_ID_MCI1,
 169         .type           = CLK_TYPE_PERIPHERAL,
 170 };
 171
 172 /* Video decoder clock - Only for sam9m10/sam9m11 */
 173 static struct clk vdec_clk = {
 174         .name           = "vdec_clk",
 175         .pmc_mask       = 1 << AT91SAM9G45_ID_VDEC,
 176         .type           = CLK_TYPE_PERIPHERAL,
 177 };
 178
 179 static struct clk *periph_clocks[] __initdata = {
 180         &pioA_clk,
 181         &pioB_clk,
 182         &pioC_clk,
 183         &pioDE_clk,
 184         &trng_clk,
 185         &usart0_clk,
 186         &usart1_clk,
 187         &usart2_clk,
 188         &usart3_clk,
 189         &mmc0_clk,
 190         &twi0_clk,
 191         &twi1_clk,
 192         &spi0_clk,
 193         &spi1_clk,
 194         &ssc0_clk,
 195         &ssc1_clk,
 196         &tcb0_clk,
 197         &pwm_clk,
 198         &tsc_clk,
 199         &dma_clk,
 200         &uhphs_clk,
 201         &lcdc_clk,
 202         &ac97_clk,
 203         &macb_clk,
 204         &isi_clk,
 205         &udphs_clk,
 206         &mmc1_clk,
 207         // irq0
 208 };
 209
 210 static struct clk_lookup periph_clocks_lookups[] = {
 211         /* One additional fake clock for macb_hclk */
 212         CLKDEV_CON_ID("hclk", &macb_clk),
 213         /* One additional fake clock for ohci */
 214         CLKDEV_CON_ID("ohci_clk", &uhphs_clk),
 215         CLKDEV_CON_DEV_ID("ehci_clk", "atmel-ehci", &uhphs_clk),
 216         CLKDEV_CON_DEV_ID("hclk", "atmel_usba_udc", &utmi_clk),
 217         CLKDEV_CON_DEV_ID("pclk", "atmel_usba_udc", &udphs_clk),
 218         CLKDEV_CON_DEV_ID("mci_clk", "atmel_mci.0", &mmc0_clk),
 219         CLKDEV_CON_DEV_ID("mci_clk", "atmel_mci.1", &mmc1_clk),
 220         CLKDEV_CON_DEV_ID("spi_clk", "atmel_spi.0", &spi0_clk),
 221         CLKDEV_CON_DEV_ID("spi_clk", "atmel_spi.1", &spi1_clk),
 222         CLKDEV_CON_DEV_ID("t0_clk", "atmel_tcb.0", &tcb0_clk),
 223         CLKDEV_CON_DEV_ID("t0_clk", "atmel_tcb.1", &tcb0_clk),
 224         CLKDEV_CON_DEV_ID("pclk", "ssc.0", &ssc0_clk),
 225         CLKDEV_CON_DEV_ID("pclk", "ssc.1", &ssc1_clk),
 226         CLKDEV_CON_DEV_ID(NULL, "atmel-trng", &trng_clk),
 227         /* more usart lookup table for DT entries */
 228         CLKDEV_CON_DEV_ID("usart", "ffffee00.serial", &mck),
 229         CLKDEV_CON_DEV_ID("usart", "fff8c000.serial", &usart0_clk),
 230         CLKDEV_CON_DEV_ID("usart", "fff90000.serial", &usart1_clk),
 231         CLKDEV_CON_DEV_ID("usart", "fff94000.serial", &usart2_clk),
 232         CLKDEV_CON_DEV_ID("usart", "fff98000.serial", &usart3_clk),
 233         /* fake hclk clock */
 234         CLKDEV_CON_DEV_ID("hclk", "at91_ohci", &uhphs_clk),
 235         CLKDEV_CON_ID("pioA", &pioA_clk),
 236         CLKDEV_CON_ID("pioB", &pioB_clk),
 237         CLKDEV_CON_ID("pioC", &pioC_clk),
 238         CLKDEV_CON_ID("pioD", &pioDE_clk),
 239         CLKDEV_CON_ID("pioE", &pioDE_clk),
 240 };
 241
 242 static struct clk_lookup usart_clocks_lookups[] = {
 243         CLKDEV_CON_DEV_ID("usart", "atmel_usart.0", &mck),
 244         CLKDEV_CON_DEV_ID("usart", "atmel_usart.1", &usart0_clk),
 245         CLKDEV_CON_DEV_ID("usart", "atmel_usart.2", &usart1_clk),
 246         CLKDEV_CON_DEV_ID("usart", "atmel_usart.3", &usart2_clk),
 247         CLKDEV_CON_DEV_ID("usart", "atmel_usart.4", &usart3_clk),
 248 };
 249
 250 /*
 251  * The two programmable clocks.
 252  * You must configure pin multiplexing to bring these signals out.
 253  */
 254 static struct clk pck0 = {
 255         .name           = "pck0",
 256         .pmc_mask       = AT91_PMC_PCK0,
 257         .type           = CLK_TYPE_PROGRAMMABLE,
 258         .id             = 0,
 259 };
 260 static struct clk pck1 = {
 261         .name           = "pck1",
 262         .pmc_mask       = AT91_PMC_PCK1,
 263         .type           = CLK_TYPE_PROGRAMMABLE,
 264         .id             = 1,
 265 };
 266
 267 static void __init at91sam9g45_register_clocks(void)
 268 {
 269         int i;
 270
 271         for (i = 0; i < ARRAY_SIZE(periph_clocks); i++)
 272                 clk_register(periph_clocks[i]);
 273
 274         clkdev_add_table(periph_clocks_lookups,
 275                          ARRAY_SIZE(periph_clocks_lookups));
 276         clkdev_add_table(usart_clocks_lookups,
 277                          ARRAY_SIZE(usart_clocks_lookups));
 278
 279         if (cpu_is_at91sam9m10() || cpu_is_at91sam9m11())
 280                 clk_register(&vdec_clk);
 281
 282         clk_register(&pck0);
 283         clk_register(&pck1);
 284 }
 285
 286 static struct clk_lookup console_clock_lookup;
 287
 288 void __init at91sam9g45_set_console_clock(int id)
 289 {
 290         if (id >= ARRAY_SIZE(usart_clocks_lookups))
 291                 return;
 292
 293         console_clock_lookup.con_id = "usart";
 294         console_clock_lookup.clk = usart_clocks_lookups[id].clk;
 295         clkdev_add(&console_clock_lookup);
 296 }
 297
 298 /* --------------------------------------------------------------------
 299  *  GPIO
 300  * -------------------------------------------------------------------- */
 301
 302 static struct at91_gpio_bank at91sam9g45_gpio[] __initdata = {
 303         {
 304                 .id             = AT91SAM9G45_ID_PIOA,
 305                 .regbase        = AT91SAM9G45_BASE_PIOA,
 306         }, {
 307                 .id             = AT91SAM9G45_ID_PIOB,
 308                 .regbase        = AT91SAM9G45_BASE_PIOB,
 309         }, {
 310                 .id             = AT91SAM9G45_ID_PIOC,
 311                 .regbase        = AT91SAM9G45_BASE_PIOC,
 312         }, {
 313                 .id             = AT91SAM9G45_ID_PIODE,
 314                 .regbase        = AT91SAM9G45_BASE_PIOD,
 315         }, {
 316                 .id             = AT91SAM9G45_ID_PIODE,
 317                 .regbase        = AT91SAM9G45_BASE_PIOE,
 318         }
 319 };
 320
 321 static void at91sam9g45_restart(char mode, const char *cmd)
 322 {
 323         at91_sys_write(AT91_RSTC_CR, AT91_RSTC_KEY | AT91_RSTC_PROCRST | AT91_RSTC_PERRST);
 324 }
 325
 326 /* --------------------------------------------------------------------
 327  *  AT91SAM9G45 processor initialization
 328  * -------------------------------------------------------------------- */
 329
 330 static void __init at91sam9g45_map_io(void)
 331 {
 332         at91_init_sram(0, AT91SAM9G45_SRAM_BASE, AT91SAM9G45_SRAM_SIZE);
 333         init_consistent_dma_size(SZ_4M);
 334 }
 335
 336 static void __init at91sam9g45_ioremap_registers(void)
 337 {
 338         at91_ioremap_shdwc(AT91SAM9G45_BASE_SHDWC);
 339         at91sam926x_ioremap_pit(AT91SAM9G45_BASE_PIT);
 340         at91sam9_ioremap_smc(0, AT91SAM9G45_BASE_SMC);
 341 }
 342
 343 static void __init at91sam9g45_initialize(void)
 344 {
 345         arm_pm_restart = at91sam9g45_restart;
 346         at91_extern_irq = (1 << AT91SAM9G45_ID_IRQ0);
 347
 348         /* Register GPIO subsystem */
 349         at91_gpio_init(at91sam9g45_gpio, 5);
 350 }
 351
 352 /* --------------------------------------------------------------------
 353  *  Interrupt initialization
 354  * -------------------------------------------------------------------- */
 355
 356 /*
 357  * The default interrupt priority levels (0 = lowest, 7 = highest).
 358  */
 359 static unsigned int at91sam9g45_default_irq_priority[NR_AIC_IRQS] __initdata = {
 360         7,      /* Advanced Interrupt Controller (FIQ) */
 361         7,      /* System Peripherals */
 362         1,      /* Parallel IO Controller A */
 363         1,      /* Parallel IO Controller B */
 364         1,      /* Parallel IO Controller C */
 365         1,      /* Parallel IO Controller D and E */
 366         0,
 367         5,      /* USART 0 */
 368         5,      /* USART 1 */
 369         5,      /* USART 2 */
 370         5,      /* USART 3 */
 371         0,      /* Multimedia Card Interface 0 */
 372         6,      /* Two-Wire Interface 0 */
 373         6,      /* Two-Wire Interface 1 */
 374         5,      /* Serial Peripheral Interface 0 */
 375         5,      /* Serial Peripheral Interface 1 */
 376         4,      /* Serial Synchronous Controller 0 */
 377         4,      /* Serial Synchronous Controller 1 */
 378         0,      /* Timer Counter 0, 1, 2, 3, 4 and 5 */
 379         0,      /* Pulse Width Modulation Controller */
 380         0,      /* Touch Screen Controller */
 381         0,      /* DMA Controller */
 382         2,      /* USB Host High Speed port */
 383         3,      /* LDC Controller */
 384         5,      /* AC97 Controller */
 385         3,      /* Ethernet */
 386         0,      /* Image Sensor Interface */
 387         2,      /* USB Device High speed port */
 388         0,
 389         0,      /* Multimedia Card Interface 1 */
 390         0,
 391         0,      /* Advanced Interrupt Controller (IRQ0) */
 392 };
 393
 394 struct at91_init_soc __initdata at91sam9g45_soc = {
 395         .map_io = at91sam9g45_map_io,
 396         .default_irq_priority = at91sam9g45_default_irq_priority,
 397         .ioremap_registers = at91sam9g45_ioremap_registers,
 398         .register_clocks = at91sam9g45_register_clocks,
 399         .init = at91sam9g45_initialize,
 400 };