arch/arm/mach-at91/at91sam9rl.c

   1 /*
   2  * arch/arm/mach-at91/at91sam9rl.c
   3  *
   4  *  Copyright (C) 2005 SAN People
   5  *  Copyright (C) 2007 Atmel Corporation
   6  *
   7  * This file is subject to the terms and conditions of the GNU General Public
   8  * License.  See the file COPYING in the main directory of this archive for
   9  * more details.
  10  */
  11
  12 #include <linux/module.h>
  13 #include <linux/pm.h>
  14
  15 #include <asm/mach/arch.h>
  16 #include <asm/mach/map.h>
  17 #include <mach/cpu.h>
  18 #include <mach/at91sam9rl.h>
  19 #include <mach/at91_pmc.h>
  20 #include <mach/at91_rstc.h>
  21 #include <mach/at91_shdwc.h>
  22
  23 #include "generic.h"
  24 #include "clock.h"
  25
  26 static struct map_desc at91sam9rl_io_desc[] __initdata = {
  27         {
  28                 .virtual        = AT91_VA_BASE_SYS,
  29                 .pfn            = __phys_to_pfn(AT91_BASE_SYS),
  30                 .length         = SZ_16K,
  31                 .type           = MT_DEVICE,
  32         },
  33 };
  34
  35 static struct map_desc at91sam9rl_sram_desc[] __initdata = {
  36         {
  37                 .pfn            = __phys_to_pfn(AT91SAM9RL_SRAM_BASE),
  38                 .type           = MT_DEVICE,
  39         }
  40 };
  41
  42 /* --------------------------------------------------------------------
  43  *  Clocks
  44  * -------------------------------------------------------------------- */
  45
  46 /*
  47  * The peripheral clocks.
  48  */
  49 static struct clk pioA_clk = {
  50         .name           = "pioA_clk",
  51         .pmc_mask       = 1 << AT91SAM9RL_ID_PIOA,
  52         .type           = CLK_TYPE_PERIPHERAL,
  53 };
  54 static struct clk pioB_clk = {
  55         .name           = "pioB_clk",
  56         .pmc_mask       = 1 << AT91SAM9RL_ID_PIOB,
  57         .type           = CLK_TYPE_PERIPHERAL,
  58 };
  59 static struct clk pioC_clk = {
  60         .name           = "pioC_clk",
  61         .pmc_mask       = 1 << AT91SAM9RL_ID_PIOC,
  62         .type           = CLK_TYPE_PERIPHERAL,
  63 };
  64 static struct clk pioD_clk = {
  65         .name           = "pioD_clk",
  66         .pmc_mask       = 1 << AT91SAM9RL_ID_PIOD,
  67         .type           = CLK_TYPE_PERIPHERAL,
  68 };
  69 static struct clk usart0_clk = {
  70         .name           = "usart0_clk",
  71         .pmc_mask       = 1 << AT91SAM9RL_ID_US0,
  72         .type           = CLK_TYPE_PERIPHERAL,
  73 };
  74 static struct clk usart1_clk = {
  75         .name           = "usart1_clk",
  76         .pmc_mask       = 1 << AT91SAM9RL_ID_US1,
  77         .type           = CLK_TYPE_PERIPHERAL,
  78 };
  79 static struct clk usart2_clk = {
  80         .name           = "usart2_clk",
  81         .pmc_mask       = 1 << AT91SAM9RL_ID_US2,
  82         .type           = CLK_TYPE_PERIPHERAL,
  83 };
  84 static struct clk usart3_clk = {
  85         .name           = "usart3_clk",
  86         .pmc_mask       = 1 << AT91SAM9RL_ID_US3,
  87         .type           = CLK_TYPE_PERIPHERAL,
  88 };
  89 static struct clk mmc_clk = {
  90         .name           = "mci_clk",
  91         .pmc_mask       = 1 << AT91SAM9RL_ID_MCI,
  92         .type           = CLK_TYPE_PERIPHERAL,
  93 };
  94 static struct clk twi0_clk = {
  95         .name           = "twi0_clk",
  96         .pmc_mask       = 1 << AT91SAM9RL_ID_TWI0,
  97         .type           = CLK_TYPE_PERIPHERAL,
  98 };
  99 static struct clk twi1_clk = {
 100         .name           = "twi1_clk",
 101         .pmc_mask       = 1 << AT91SAM9RL_ID_TWI1,
 102         .type           = CLK_TYPE_PERIPHERAL,
 103 };
 104 static struct clk spi_clk = {
 105         .name           = "spi_clk",
 106         .pmc_mask       = 1 << AT91SAM9RL_ID_SPI,
 107         .type           = CLK_TYPE_PERIPHERAL,
 108 };
 109 static struct clk ssc0_clk = {
 110         .name           = "ssc0_clk",
 111         .pmc_mask       = 1 << AT91SAM9RL_ID_SSC0,
 112         .type           = CLK_TYPE_PERIPHERAL,
 113 };
 114 static struct clk ssc1_clk = {
 115         .name           = "ssc1_clk",
 116         .pmc_mask       = 1 << AT91SAM9RL_ID_SSC1,
 117         .type           = CLK_TYPE_PERIPHERAL,
 118 };
 119 static struct clk tc0_clk = {
 120         .name           = "tc0_clk",
 121         .pmc_mask       = 1 << AT91SAM9RL_ID_TC0,
 122         .type           = CLK_TYPE_PERIPHERAL,
 123 };
 124 static struct clk tc1_clk = {
 125         .name           = "tc1_clk",
 126         .pmc_mask       = 1 << AT91SAM9RL_ID_TC1,
 127         .type           = CLK_TYPE_PERIPHERAL,
 128 };
 129 static struct clk tc2_clk = {
 130         .name           = "tc2_clk",
 131         .pmc_mask       = 1 << AT91SAM9RL_ID_TC2,
 132         .type           = CLK_TYPE_PERIPHERAL,
 133 };
 134 static struct clk pwmc_clk = {
 135         .name           = "pwmc_clk",
 136         .pmc_mask       = 1 << AT91SAM9RL_ID_PWMC,
 137         .type           = CLK_TYPE_PERIPHERAL,
 138 };
 139 static struct clk tsc_clk = {
 140         .name           = "tsc_clk",
 141         .pmc_mask       = 1 << AT91SAM9RL_ID_TSC,
 142         .type           = CLK_TYPE_PERIPHERAL,
 143 };
 144 static struct clk dma_clk = {
 145         .name           = "dma_clk",
 146         .pmc_mask       = 1 << AT91SAM9RL_ID_DMA,
 147         .type           = CLK_TYPE_PERIPHERAL,
 148 };
 149 static struct clk udphs_clk = {
 150         .name           = "udphs_clk",
 151         .pmc_mask       = 1 << AT91SAM9RL_ID_UDPHS,
 152         .type           = CLK_TYPE_PERIPHERAL,
 153 };
 154 static struct clk lcdc_clk = {
 155         .name           = "lcdc_clk",
 156         .pmc_mask       = 1 << AT91SAM9RL_ID_LCDC,
 157         .type           = CLK_TYPE_PERIPHERAL,
 158 };
 159 static struct clk ac97_clk = {
 160         .name           = "ac97_clk",
 161         .pmc_mask       = 1 << AT91SAM9RL_ID_AC97C,
 162         .type           = CLK_TYPE_PERIPHERAL,
 163 };
 164
 165 static struct clk *periph_clocks[] __initdata = {
 166         &pioA_clk,
 167         &pioB_clk,
 168         &pioC_clk,
 169         &pioD_clk,
 170         &usart0_clk,
 171         &usart1_clk,
 172         &usart2_clk,
 173         &usart3_clk,
 174         &mmc_clk,
 175         &twi0_clk,
 176         &twi1_clk,
 177         &spi_clk,
 178         &ssc0_clk,
 179         &ssc1_clk,
 180         &tc0_clk,
 181         &tc1_clk,
 182         &tc2_clk,
 183         &pwmc_clk,
 184         &tsc_clk,
 185         &dma_clk,
 186         &udphs_clk,
 187         &lcdc_clk,
 188         &ac97_clk,
 189         // irq0
 190 };
 191
 192 /*
 193  * The two programmable clocks.
 194  * You must configure pin multiplexing to bring these signals out.
 195  */
 196 static struct clk pck0 = {
 197         .name           = "pck0",
 198         .pmc_mask       = AT91_PMC_PCK0,
 199         .type           = CLK_TYPE_PROGRAMMABLE,
 200         .id             = 0,
 201 };
 202 static struct clk pck1 = {
 203         .name           = "pck1",
 204         .pmc_mask       = AT91_PMC_PCK1,
 205         .type           = CLK_TYPE_PROGRAMMABLE,
 206         .id             = 1,
 207 };
 208
 209 static void __init at91sam9rl_register_clocks(void)
 210 {
 211         int i;
 212
 213         for (i = 0; i < ARRAY_SIZE(periph_clocks); i++)
 214                 clk_register(periph_clocks[i]);
 215
 216         clk_register(&pck0);
 217         clk_register(&pck1);
 218 }
 219
 220 /* --------------------------------------------------------------------
 221  *  GPIO
 222  * -------------------------------------------------------------------- */
 223
 224 static struct at91_gpio_bank at91sam9rl_gpio[] = {
 225         {
 226                 .id             = AT91SAM9RL_ID_PIOA,
 227                 .offset         = AT91_PIOA,
 228                 .clock          = &pioA_clk,
 229         }, {
 230                 .id             = AT91SAM9RL_ID_PIOB,
 231                 .offset         = AT91_PIOB,
 232                 .clock          = &pioB_clk,
 233         }, {
 234                 .id             = AT91SAM9RL_ID_PIOC,
 235                 .offset         = AT91_PIOC,
 236                 .clock          = &pioC_clk,
 237         }, {
 238                 .id             = AT91SAM9RL_ID_PIOD,
 239                 .offset         = AT91_PIOD,
 240                 .clock          = &pioD_clk,
 241         }
 242 };
 243
 244 static void at91sam9rl_reset(void)
 245 {
 246         at91_sys_write(AT91_RSTC_CR, AT91_RSTC_KEY | AT91_RSTC_PROCRST | AT91_RSTC_PERRST);
 247 }
 248
 249 static void at91sam9rl_poweroff(void)
 250 {
 251         at91_sys_write(AT91_SHDW_CR, AT91_SHDW_KEY | AT91_SHDW_SHDW);
 252 }
 253
 254
 255 /* --------------------------------------------------------------------
 256  *  AT91SAM9RL processor initialization
 257  * -------------------------------------------------------------------- */
 258
 259 void __init at91sam9rl_initialize(unsigned long main_clock)
 260 {
 261         unsigned long cidr, sram_size;
 262
 263         /* Map peripherals */
 264         iotable_init(at91sam9rl_io_desc, ARRAY_SIZE(at91sam9rl_io_desc));
 265
 266         cidr = at91_sys_read(AT91_DBGU_CIDR);
 267
 268         switch (cidr & AT91_CIDR_SRAMSIZ) {
 269                 case AT91_CIDR_SRAMSIZ_32K:
 270                         sram_size = 2 * SZ_16K;
 271                         break;
 272                 case AT91_CIDR_SRAMSIZ_16K:
 273                 default:
 274                         sram_size = SZ_16K;
 275         }
 276
 277         at91sam9rl_sram_desc->virtual = AT91_IO_VIRT_BASE - sram_size;
 278         at91sam9rl_sram_desc->length = sram_size;
 279
 280         /* Map SRAM */
 281         iotable_init(at91sam9rl_sram_desc, ARRAY_SIZE(at91sam9rl_sram_desc));
 282
 283         at91_arch_reset = at91sam9rl_reset;
 284         pm_power_off = at91sam9rl_poweroff;
 285         at91_extern_irq = (1 << AT91SAM9RL_ID_IRQ0);
 286
 287         /* Init clock subsystem */
 288         at91_clock_init(main_clock);
 289
 290         /* Register the processor-specific clocks */
 291         at91sam9rl_register_clocks();
 292
 293         /* Register GPIO subsystem */
 294         at91_gpio_init(at91sam9rl_gpio, 4);
 295 }
 296
 297 /* --------------------------------------------------------------------
 298  *  Interrupt initialization
 299  * -------------------------------------------------------------------- */
 300
 301 /*
 302  * The default interrupt priority levels (0 = lowest, 7 = highest).
 303  */
 304 static unsigned int at91sam9rl_default_irq_priority[NR_AIC_IRQS] __initdata = {
 305         7,      /* Advanced Interrupt Controller */
 306         7,      /* System Peripherals */
 307         1,      /* Parallel IO Controller A */
 308         1,      /* Parallel IO Controller B */
 309         1,      /* Parallel IO Controller C */
 310         1,      /* Parallel IO Controller D */
 311         5,      /* USART 0 */
 312         5,      /* USART 1 */
 313         5,      /* USART 2 */
 314         5,      /* USART 3 */
 315         0,      /* Multimedia Card Interface */
 316         6,      /* Two-Wire Interface 0 */
 317         6,      /* Two-Wire Interface 1 */
 318         5,      /* Serial Peripheral Interface */
 319         4,      /* Serial Synchronous Controller 0 */
 320         4,      /* Serial Synchronous Controller 1 */
 321         0,      /* Timer Counter 0 */
 322         0,      /* Timer Counter 1 */
 323         0,      /* Timer Counter 2 */
 324         0,
 325         0,      /* Touch Screen Controller */
 326         0,      /* DMA Controller */
 327         2,      /* USB Device High speed port */
 328         2,      /* LCD Controller */
 329         6,      /* AC97 Controller */
 330         0,
 331         0,
 332         0,
 333         0,
 334         0,
 335         0,
 336         0,      /* Advanced Interrupt Controller */
 337 };
 338
 339 void __init at91sam9rl_init_interrupts(unsigned int priority[NR_AIC_IRQS])
 340 {
 341         if (!priority)
 342                 priority = at91sam9rl_default_irq_priority;
 343
 344         /* Initialize the AIC interrupt controller */
 345         at91_aic_init(priority);
 346
 347         /* Enable GPIO interrupts */
 348         at91_gpio_irq_setup();
 349 }