release/src-rt-6.x/linux/linux-2.6/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
  14 #include <asm/mach/arch.h>
  15 #include <asm/mach/map.h>
  16 #include <asm/arch/cpu.h>
  17 #include <asm/arch/at91sam9rl.h>
  18 #include <asm/arch/at91_pmc.h>
  19 #include <asm/arch/at91_rstc.h>
  20
  21 #include "generic.h"
  22 #include "clock.h"
  23
  24 static struct map_desc at91sam9rl_io_desc[] __initdata = {
  25         {
  26                 .virtual        = AT91_VA_BASE_SYS,
  27                 .pfn            = __phys_to_pfn(AT91_BASE_SYS),
  28                 .length         = SZ_16K,
  29                 .type           = MT_DEVICE,
  30         },
  31 };
  32
  33 static struct map_desc at91sam9rl_sram_desc[] __initdata = {
  34         {
  35                 .pfn            = __phys_to_pfn(AT91SAM9RL_SRAM_BASE),
  36                 .type           = MT_DEVICE,
  37         }
  38 };
  39
  40 /* --------------------------------------------------------------------
  41  *  Clocks
  42  * -------------------------------------------------------------------- */
  43
  44 /*
  45  * The peripheral clocks.
  46  */
  47 static struct clk pioA_clk = {
  48         .name           = "pioA_clk",
  49         .pmc_mask       = 1 << AT91SAM9RL_ID_PIOA,
  50         .type           = CLK_TYPE_PERIPHERAL,
  51 };
  52 static struct clk pioB_clk = {
  53         .name           = "pioB_clk",
  54         .pmc_mask       = 1 << AT91SAM9RL_ID_PIOB,
  55         .type           = CLK_TYPE_PERIPHERAL,
  56 };
  57 static struct clk pioC_clk = {
  58         .name           = "pioC_clk",
  59         .pmc_mask       = 1 << AT91SAM9RL_ID_PIOC,
  60         .type           = CLK_TYPE_PERIPHERAL,
  61 };
  62 static struct clk pioD_clk = {
  63         .name           = "pioD_clk",
  64         .pmc_mask       = 1 << AT91SAM9RL_ID_PIOD,
  65         .type           = CLK_TYPE_PERIPHERAL,
  66 };
  67 static struct clk usart0_clk = {
  68         .name           = "usart0_clk",
  69         .pmc_mask       = 1 << AT91SAM9RL_ID_US0,
  70         .type           = CLK_TYPE_PERIPHERAL,
  71 };
  72 static struct clk usart1_clk = {
  73         .name           = "usart1_clk",
  74         .pmc_mask       = 1 << AT91SAM9RL_ID_US1,
  75         .type           = CLK_TYPE_PERIPHERAL,
  76 };
  77 static struct clk usart2_clk = {
  78         .name           = "usart2_clk",
  79         .pmc_mask       = 1 << AT91SAM9RL_ID_US2,
  80         .type           = CLK_TYPE_PERIPHERAL,
  81 };
  82 static struct clk usart3_clk = {
  83         .name           = "usart3_clk",
  84         .pmc_mask       = 1 << AT91SAM9RL_ID_US3,
  85         .type           = CLK_TYPE_PERIPHERAL,
  86 };
  87 static struct clk mmc_clk = {
  88         .name           = "mci_clk",
  89         .pmc_mask       = 1 << AT91SAM9RL_ID_MCI,
  90         .type           = CLK_TYPE_PERIPHERAL,
  91 };
  92 static struct clk twi0_clk = {
  93         .name           = "twi0_clk",
  94         .pmc_mask       = 1 << AT91SAM9RL_ID_TWI0,
  95         .type           = CLK_TYPE_PERIPHERAL,
  96 };
  97 static struct clk twi1_clk = {
  98         .name           = "twi1_clk",
  99         .pmc_mask       = 1 << AT91SAM9RL_ID_TWI1,
 100         .type           = CLK_TYPE_PERIPHERAL,
 101 };
 102 static struct clk spi_clk = {
 103         .name           = "spi_clk",
 104         .pmc_mask       = 1 << AT91SAM9RL_ID_SPI,
 105         .type           = CLK_TYPE_PERIPHERAL,
 106 };
 107 static struct clk ssc0_clk = {
 108         .name           = "ssc0_clk",
 109         .pmc_mask       = 1 << AT91SAM9RL_ID_SSC0,
 110         .type           = CLK_TYPE_PERIPHERAL,
 111 };
 112 static struct clk ssc1_clk = {
 113         .name           = "ssc1_clk",
 114         .pmc_mask       = 1 << AT91SAM9RL_ID_SSC1,
 115         .type           = CLK_TYPE_PERIPHERAL,
 116 };
 117 static struct clk tc0_clk = {
 118         .name           = "tc0_clk",
 119         .pmc_mask       = 1 << AT91SAM9RL_ID_TC0,
 120         .type           = CLK_TYPE_PERIPHERAL,
 121 };
 122 static struct clk tc1_clk = {
 123         .name           = "tc1_clk",
 124         .pmc_mask       = 1 << AT91SAM9RL_ID_TC1,
 125         .type           = CLK_TYPE_PERIPHERAL,
 126 };
 127 static struct clk tc2_clk = {
 128         .name           = "tc2_clk",
 129         .pmc_mask       = 1 << AT91SAM9RL_ID_TC2,
 130         .type           = CLK_TYPE_PERIPHERAL,
 131 };
 132 static struct clk pwmc_clk = {
 133         .name           = "pwmc_clk",
 134         .pmc_mask       = 1 << AT91SAM9RL_ID_PWMC,
 135         .type           = CLK_TYPE_PERIPHERAL,
 136 };
 137 static struct clk tsc_clk = {
 138         .name           = "tsc_clk",
 139         .pmc_mask       = 1 << AT91SAM9RL_ID_TSC,
 140         .type           = CLK_TYPE_PERIPHERAL,
 141 };
 142 static struct clk dma_clk = {
 143         .name           = "dma_clk",
 144         .pmc_mask       = 1 << AT91SAM9RL_ID_DMA,
 145         .type           = CLK_TYPE_PERIPHERAL,
 146 };
 147 static struct clk udphs_clk = {
 148         .name           = "udphs_clk",
 149         .pmc_mask       = 1 << AT91SAM9RL_ID_UDPHS,
 150         .type           = CLK_TYPE_PERIPHERAL,
 151 };
 152 static struct clk lcdc_clk = {
 153         .name           = "lcdc_clk",
 154         .pmc_mask       = 1 << AT91SAM9RL_ID_LCDC,
 155         .type           = CLK_TYPE_PERIPHERAL,
 156 };
 157 static struct clk ac97_clk = {
 158         .name           = "ac97_clk",
 159         .pmc_mask       = 1 << AT91SAM9RL_ID_AC97C,
 160         .type           = CLK_TYPE_PERIPHERAL,
 161 };
 162
 163 static struct clk *periph_clocks[] __initdata = {
 164         &pioA_clk,
 165         &pioB_clk,
 166         &pioC_clk,
 167         &pioD_clk,
 168         &usart0_clk,
 169         &usart1_clk,
 170         &usart2_clk,
 171         &usart3_clk,
 172         &mmc_clk,
 173         &twi0_clk,
 174         &twi1_clk,
 175         &spi_clk,
 176         &ssc0_clk,
 177         &ssc1_clk,
 178         &tc0_clk,
 179         &tc1_clk,
 180         &tc2_clk,
 181         &pwmc_clk,
 182         &tsc_clk,
 183         &dma_clk,
 184         &udphs_clk,
 185         &lcdc_clk,
 186         &ac97_clk,
 187         // irq0
 188 };
 189
 190 /*
 191  * The two programmable clocks.
 192  * You must configure pin multiplexing to bring these signals out.
 193  */
 194 static struct clk pck0 = {
 195         .name           = "pck0",
 196         .pmc_mask       = AT91_PMC_PCK0,
 197         .type           = CLK_TYPE_PROGRAMMABLE,
 198         .id             = 0,
 199 };
 200 static struct clk pck1 = {
 201         .name           = "pck1",
 202         .pmc_mask       = AT91_PMC_PCK1,
 203         .type           = CLK_TYPE_PROGRAMMABLE,
 204         .id             = 1,
 205 };
 206
 207 static void __init at91sam9rl_register_clocks(void)
 208 {
 209         int i;
 210
 211         for (i = 0; i < ARRAY_SIZE(periph_clocks); i++)
 212                 clk_register(periph_clocks[i]);
 213
 214         clk_register(&pck0);
 215         clk_register(&pck1);
 216 }
 217
 218 /* --------------------------------------------------------------------
 219  *  GPIO
 220  * -------------------------------------------------------------------- */
 221
 222 static struct at91_gpio_bank at91sam9rl_gpio[] = {
 223         {
 224                 .id             = AT91SAM9RL_ID_PIOA,
 225                 .offset         = AT91_PIOA,
 226                 .clock          = &pioA_clk,
 227         }, {
 228                 .id             = AT91SAM9RL_ID_PIOB,
 229                 .offset         = AT91_PIOB,
 230                 .clock          = &pioB_clk,
 231         }, {
 232                 .id             = AT91SAM9RL_ID_PIOC,
 233                 .offset         = AT91_PIOC,
 234                 .clock          = &pioC_clk,
 235         }, {
 236                 .id             = AT91SAM9RL_ID_PIOD,
 237                 .offset         = AT91_PIOD,
 238                 .clock          = &pioD_clk,
 239         }
 240 };
 241
 242 static void at91sam9rl_reset(void)
 243 {
 244         at91_sys_write(AT91_RSTC_CR, AT91_RSTC_KEY | AT91_RSTC_PROCRST | AT91_RSTC_PERRST);
 245 }
 246
 247
 248 /* --------------------------------------------------------------------
 249  *  AT91SAM9RL processor initialization
 250  * -------------------------------------------------------------------- */
 251
 252 void __init at91sam9rl_initialize(unsigned long main_clock)
 253 {
 254         unsigned long cidr, sram_size;
 255
 256         /* Map peripherals */
 257         iotable_init(at91sam9rl_io_desc, ARRAY_SIZE(at91sam9rl_io_desc));
 258
 259         cidr = at91_sys_read(AT91_DBGU_CIDR);
 260
 261         switch (cidr & AT91_CIDR_SRAMSIZ) {
 262                 case AT91_CIDR_SRAMSIZ_32K:
 263                         sram_size = 2 * SZ_16K;
 264                         break;
 265                 case AT91_CIDR_SRAMSIZ_16K:
 266                 default:
 267                         sram_size = SZ_16K;
 268         }
 269
 270         at91sam9rl_sram_desc->virtual = AT91_IO_VIRT_BASE - sram_size;
 271         at91sam9rl_sram_desc->length = sram_size;
 272
 273         /* Map SRAM */
 274         iotable_init(at91sam9rl_sram_desc, ARRAY_SIZE(at91sam9rl_sram_desc));
 275
 276         at91_arch_reset = at91sam9rl_reset;
 277         at91_extern_irq = (1 << AT91SAM9RL_ID_IRQ0);
 278
 279         /* Init clock subsystem */
 280         at91_clock_init(main_clock);
 281
 282         /* Register the processor-specific clocks */
 283         at91sam9rl_register_clocks();
 284
 285         /* Register GPIO subsystem */
 286         at91_gpio_init(at91sam9rl_gpio, 4);
 287 }
 288
 289 /* --------------------------------------------------------------------
 290  *  Interrupt initialization
 291  * -------------------------------------------------------------------- */
 292
 293 /*
 294  * The default interrupt priority levels (0 = lowest, 7 = highest).
 295  */
 296 static unsigned int at91sam9rl_default_irq_priority[NR_AIC_IRQS] __initdata = {
 297         7,      /* Advanced Interrupt Controller */
 298         7,      /* System Peripherals */
 299         1,      /* Parallel IO Controller A */
 300         1,      /* Parallel IO Controller B */
 301         1,      /* Parallel IO Controller C */
 302         1,      /* Parallel IO Controller D */
 303         5,      /* USART 0 */
 304         5,      /* USART 1 */
 305         5,      /* USART 2 */
 306         5,      /* USART 3 */
 307         0,      /* Multimedia Card Interface */
 308         6,      /* Two-Wire Interface 0 */
 309         6,      /* Two-Wire Interface 1 */
 310         5,      /* Serial Peripheral Interface */
 311         4,      /* Serial Synchronous Controller 0 */
 312         4,      /* Serial Synchronous Controller 1 */
 313         0,      /* Timer Counter 0 */
 314         0,      /* Timer Counter 1 */
 315         0,      /* Timer Counter 2 */
 316         0,
 317         0,      /* Touch Screen Controller */
 318         0,      /* DMA Controller */
 319         2,      /* USB Device High speed port */
 320         2,      /* LCD Controller */
 321         6,      /* AC97 Controller */
 322         0,
 323         0,
 324         0,
 325         0,
 326         0,
 327         0,
 328         0,      /* Advanced Interrupt Controller */
 329 };
 330
 331 void __init at91sam9rl_init_interrupts(unsigned int priority[NR_AIC_IRQS])
 332 {
 333         if (!priority)
 334                 priority = at91sam9rl_default_irq_priority;
 335
 336         /* Initialize the AIC interrupt controller */
 337         at91_aic_init(priority);
 338
 339         /* Enable GPIO interrupts */
 340         at91_gpio_irq_setup();
 341 }