arch/arm/mach-at91/at91cap9.c

   1 /*
   2  * arch/arm/mach-at91/at91cap9.c
   3  *
   4  *  Copyright (C) 2007 Stelian Pop <stelian.pop@leadtechdesign.com>
   5  *  Copyright (C) 2007 Lead Tech Design <www.leadtechdesign.com>
   6  *  Copyright (C) 2007 Atmel Corporation.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  */
  14
  15 #include <linux/module.h>
  16 #include <linux/pm.h>
  17
  18 #include <asm/irq.h>
  19 #include <asm/mach/arch.h>
  20 #include <asm/mach/map.h>
  21
  22 #include <mach/cpu.h>
  23 #include <mach/at91cap9.h>
  24 #include <mach/at91_pmc.h>
  25 #include <mach/at91_rstc.h>
  26 #include <mach/at91_shdwc.h>
  27
  28 #include "generic.h"
  29 #include "clock.h"
  30
  31 static struct map_desc at91cap9_io_desc[] __initdata = {
  32         {
  33                 .virtual        = AT91_VA_BASE_SYS,
  34                 .pfn            = __phys_to_pfn(AT91_BASE_SYS),
  35                 .length         = SZ_16K,
  36                 .type           = MT_DEVICE,
  37         }, {
  38                 .virtual        = AT91_IO_VIRT_BASE - AT91CAP9_SRAM_SIZE,
  39                 .pfn            = __phys_to_pfn(AT91CAP9_SRAM_BASE),
  40                 .length         = AT91CAP9_SRAM_SIZE,
  41                 .type           = MT_DEVICE,
  42         },
  43 };
  44
  45 /* --------------------------------------------------------------------
  46  *  Clocks
  47  * -------------------------------------------------------------------- */
  48
  49 /*
  50  * The peripheral clocks.
  51  */
  52 static struct clk pioABCD_clk = {
  53         .name           = "pioABCD_clk",
  54         .pmc_mask       = 1 << AT91CAP9_ID_PIOABCD,
  55         .type           = CLK_TYPE_PERIPHERAL,
  56 };
  57 static struct clk mpb0_clk = {
  58         .name           = "mpb0_clk",
  59         .pmc_mask       = 1 << AT91CAP9_ID_MPB0,
  60         .type           = CLK_TYPE_PERIPHERAL,
  61 };
  62 static struct clk mpb1_clk = {
  63         .name           = "mpb1_clk",
  64         .pmc_mask       = 1 << AT91CAP9_ID_MPB1,
  65         .type           = CLK_TYPE_PERIPHERAL,
  66 };
  67 static struct clk mpb2_clk = {
  68         .name           = "mpb2_clk",
  69         .pmc_mask       = 1 << AT91CAP9_ID_MPB2,
  70         .type           = CLK_TYPE_PERIPHERAL,
  71 };
  72 static struct clk mpb3_clk = {
  73         .name           = "mpb3_clk",
  74         .pmc_mask       = 1 << AT91CAP9_ID_MPB3,
  75         .type           = CLK_TYPE_PERIPHERAL,
  76 };
  77 static struct clk mpb4_clk = {
  78         .name           = "mpb4_clk",
  79         .pmc_mask       = 1 << AT91CAP9_ID_MPB4,
  80         .type           = CLK_TYPE_PERIPHERAL,
  81 };
  82 static struct clk usart0_clk = {
  83         .name           = "usart0_clk",
  84         .pmc_mask       = 1 << AT91CAP9_ID_US0,
  85         .type           = CLK_TYPE_PERIPHERAL,
  86 };
  87 static struct clk usart1_clk = {
  88         .name           = "usart1_clk",
  89         .pmc_mask       = 1 << AT91CAP9_ID_US1,
  90         .type           = CLK_TYPE_PERIPHERAL,
  91 };
  92 static struct clk usart2_clk = {
  93         .name           = "usart2_clk",
  94         .pmc_mask       = 1 << AT91CAP9_ID_US2,
  95         .type           = CLK_TYPE_PERIPHERAL,
  96 };
  97 static struct clk mmc0_clk = {
  98         .name           = "mci0_clk",
  99         .pmc_mask       = 1 << AT91CAP9_ID_MCI0,
 100         .type           = CLK_TYPE_PERIPHERAL,
 101 };
 102 static struct clk mmc1_clk = {
 103         .name           = "mci1_clk",
 104         .pmc_mask       = 1 << AT91CAP9_ID_MCI1,
 105         .type           = CLK_TYPE_PERIPHERAL,
 106 };
 107 static struct clk can_clk = {
 108         .name           = "can_clk",
 109         .pmc_mask       = 1 << AT91CAP9_ID_CAN,
 110         .type           = CLK_TYPE_PERIPHERAL,
 111 };
 112 static struct clk twi_clk = {
 113         .name           = "twi_clk",
 114         .pmc_mask       = 1 << AT91CAP9_ID_TWI,
 115         .type           = CLK_TYPE_PERIPHERAL,
 116 };
 117 static struct clk spi0_clk = {
 118         .name           = "spi0_clk",
 119         .pmc_mask       = 1 << AT91CAP9_ID_SPI0,
 120         .type           = CLK_TYPE_PERIPHERAL,
 121 };
 122 static struct clk spi1_clk = {
 123         .name           = "spi1_clk",
 124         .pmc_mask       = 1 << AT91CAP9_ID_SPI1,
 125         .type           = CLK_TYPE_PERIPHERAL,
 126 };
 127 static struct clk ssc0_clk = {
 128         .name           = "ssc0_clk",
 129         .pmc_mask       = 1 << AT91CAP9_ID_SSC0,
 130         .type           = CLK_TYPE_PERIPHERAL,
 131 };
 132 static struct clk ssc1_clk = {
 133         .name           = "ssc1_clk",
 134         .pmc_mask       = 1 << AT91CAP9_ID_SSC1,
 135         .type           = CLK_TYPE_PERIPHERAL,
 136 };
 137 static struct clk ac97_clk = {
 138         .name           = "ac97_clk",
 139         .pmc_mask       = 1 << AT91CAP9_ID_AC97C,
 140         .type           = CLK_TYPE_PERIPHERAL,
 141 };
 142 static struct clk tcb_clk = {
 143         .name           = "tcb_clk",
 144         .pmc_mask       = 1 << AT91CAP9_ID_TCB,
 145         .type           = CLK_TYPE_PERIPHERAL,
 146 };
 147 static struct clk pwm_clk = {
 148         .name           = "pwm_clk",
 149         .pmc_mask       = 1 << AT91CAP9_ID_PWMC,
 150         .type           = CLK_TYPE_PERIPHERAL,
 151 };
 152 static struct clk macb_clk = {
 153         .name           = "macb_clk",
 154         .pmc_mask       = 1 << AT91CAP9_ID_EMAC,
 155         .type           = CLK_TYPE_PERIPHERAL,
 156 };
 157 static struct clk aestdes_clk = {
 158         .name           = "aestdes_clk",
 159         .pmc_mask       = 1 << AT91CAP9_ID_AESTDES,
 160         .type           = CLK_TYPE_PERIPHERAL,
 161 };
 162 static struct clk adc_clk = {
 163         .name           = "adc_clk",
 164         .pmc_mask       = 1 << AT91CAP9_ID_ADC,
 165         .type           = CLK_TYPE_PERIPHERAL,
 166 };
 167 static struct clk isi_clk = {
 168         .name           = "isi_clk",
 169         .pmc_mask       = 1 << AT91CAP9_ID_ISI,
 170         .type           = CLK_TYPE_PERIPHERAL,
 171 };
 172 static struct clk lcdc_clk = {
 173         .name           = "lcdc_clk",
 174         .pmc_mask       = 1 << AT91CAP9_ID_LCDC,
 175         .type           = CLK_TYPE_PERIPHERAL,
 176 };
 177 static struct clk dma_clk = {
 178         .name           = "dma_clk",
 179         .pmc_mask       = 1 << AT91CAP9_ID_DMA,
 180         .type           = CLK_TYPE_PERIPHERAL,
 181 };
 182 static struct clk udphs_clk = {
 183         .name           = "udphs_clk",
 184         .pmc_mask       = 1 << AT91CAP9_ID_UDPHS,
 185         .type           = CLK_TYPE_PERIPHERAL,
 186 };
 187 static struct clk ohci_clk = {
 188         .name           = "ohci_clk",
 189         .pmc_mask       = 1 << AT91CAP9_ID_UHP,
 190         .type           = CLK_TYPE_PERIPHERAL,
 191 };
 192
 193 static struct clk *periph_clocks[] __initdata = {
 194         &pioABCD_clk,
 195         &mpb0_clk,
 196         &mpb1_clk,
 197         &mpb2_clk,
 198         &mpb3_clk,
 199         &mpb4_clk,
 200         &usart0_clk,
 201         &usart1_clk,
 202         &usart2_clk,
 203         &mmc0_clk,
 204         &mmc1_clk,
 205         &can_clk,
 206         &twi_clk,
 207         &spi0_clk,
 208         &spi1_clk,
 209         &ssc0_clk,
 210         &ssc1_clk,
 211         &ac97_clk,
 212         &tcb_clk,
 213         &pwm_clk,
 214         &macb_clk,
 215         &aestdes_clk,
 216         &adc_clk,
 217         &isi_clk,
 218         &lcdc_clk,
 219         &dma_clk,
 220         &udphs_clk,
 221         &ohci_clk,
 222         // irq0 .. irq1
 223 };
 224
 225 static struct clk_lookup periph_clocks_lookups[] = {
 226         CLKDEV_CON_DEV_ID("hclk", "atmel_usba_udc", &utmi_clk),
 227         CLKDEV_CON_DEV_ID("pclk", "atmel_usba_udc", &udphs_clk),
 228         CLKDEV_CON_DEV_ID("mci_clk", "at91_mci.0", &mmc0_clk),
 229         CLKDEV_CON_DEV_ID("mci_clk", "at91_mci.1", &mmc1_clk),
 230         CLKDEV_CON_DEV_ID("spi_clk", "atmel_spi.0", &spi0_clk),
 231         CLKDEV_CON_DEV_ID("spi_clk", "atmel_spi.1", &spi1_clk),
 232         CLKDEV_CON_DEV_ID("t0_clk", "atmel_tcb.0", &tcb_clk),
 233         CLKDEV_CON_DEV_ID("pclk", "ssc.0", &ssc0_clk),
 234         CLKDEV_CON_DEV_ID("pclk", "ssc.1", &ssc1_clk),
 235 };
 236
 237 static struct clk_lookup usart_clocks_lookups[] = {
 238         CLKDEV_CON_DEV_ID("usart", "atmel_usart.0", &mck),
 239         CLKDEV_CON_DEV_ID("usart", "atmel_usart.1", &usart0_clk),
 240         CLKDEV_CON_DEV_ID("usart", "atmel_usart.2", &usart1_clk),
 241         CLKDEV_CON_DEV_ID("usart", "atmel_usart.3", &usart2_clk),
 242 };
 243
 244 /*
 245  * The four programmable clocks.
 246  * You must configure pin multiplexing to bring these signals out.
 247  */
 248 static struct clk pck0 = {
 249         .name           = "pck0",
 250         .pmc_mask       = AT91_PMC_PCK0,
 251         .type           = CLK_TYPE_PROGRAMMABLE,
 252         .id             = 0,
 253 };
 254 static struct clk pck1 = {
 255         .name           = "pck1",
 256         .pmc_mask       = AT91_PMC_PCK1,
 257         .type           = CLK_TYPE_PROGRAMMABLE,
 258         .id             = 1,
 259 };
 260 static struct clk pck2 = {
 261         .name           = "pck2",
 262         .pmc_mask       = AT91_PMC_PCK2,
 263         .type           = CLK_TYPE_PROGRAMMABLE,
 264         .id             = 2,
 265 };
 266 static struct clk pck3 = {
 267         .name           = "pck3",
 268         .pmc_mask       = AT91_PMC_PCK3,
 269         .type           = CLK_TYPE_PROGRAMMABLE,
 270         .id             = 3,
 271 };
 272
 273 static void __init at91cap9_register_clocks(void)
 274 {
 275         int i;
 276
 277         for (i = 0; i < ARRAY_SIZE(periph_clocks); i++)
 278                 clk_register(periph_clocks[i]);
 279
 280         clkdev_add_table(periph_clocks_lookups,
 281                          ARRAY_SIZE(periph_clocks_lookups));
 282         clkdev_add_table(usart_clocks_lookups,
 283                          ARRAY_SIZE(usart_clocks_lookups));
 284
 285         clk_register(&pck0);
 286         clk_register(&pck1);
 287         clk_register(&pck2);
 288         clk_register(&pck3);
 289 }
 290
 291 static struct clk_lookup console_clock_lookup;
 292
 293 void __init at91cap9_set_console_clock(int id)
 294 {
 295         if (id >= ARRAY_SIZE(usart_clocks_lookups))
 296                 return;
 297
 298         console_clock_lookup.con_id = "usart";
 299         console_clock_lookup.clk = usart_clocks_lookups[id].clk;
 300         clkdev_add(&console_clock_lookup);
 301 }
 302
 303 /* --------------------------------------------------------------------
 304  *  GPIO
 305  * -------------------------------------------------------------------- */
 306
 307 static struct at91_gpio_bank at91cap9_gpio[] = {
 308         {
 309                 .id             = AT91CAP9_ID_PIOABCD,
 310                 .offset         = AT91_PIOA,
 311                 .clock          = &pioABCD_clk,
 312         }, {
 313                 .id             = AT91CAP9_ID_PIOABCD,
 314                 .offset         = AT91_PIOB,
 315                 .clock          = &pioABCD_clk,
 316         }, {
 317                 .id             = AT91CAP9_ID_PIOABCD,
 318                 .offset         = AT91_PIOC,
 319                 .clock          = &pioABCD_clk,
 320         }, {
 321                 .id             = AT91CAP9_ID_PIOABCD,
 322                 .offset         = AT91_PIOD,
 323                 .clock          = &pioABCD_clk,
 324         }
 325 };
 326
 327 static void at91cap9_reset(void)
 328 {
 329         at91_sys_write(AT91_RSTC_CR, AT91_RSTC_KEY | AT91_RSTC_PROCRST | AT91_RSTC_PERRST);
 330 }
 331
 332 static void at91cap9_poweroff(void)
 333 {
 334         at91_sys_write(AT91_SHDW_CR, AT91_SHDW_KEY | AT91_SHDW_SHDW);
 335 }
 336
 337
 338 /* --------------------------------------------------------------------
 339  *  AT91CAP9 processor initialization
 340  * -------------------------------------------------------------------- */
 341
 342 void __init at91cap9_map_io(void)
 343 {
 344         /* Map peripherals */
 345         iotable_init(at91cap9_io_desc, ARRAY_SIZE(at91cap9_io_desc));
 346 }
 347
 348 void __init at91cap9_initialize(unsigned long main_clock)
 349 {
 350         at91_arch_reset = at91cap9_reset;
 351         pm_power_off = at91cap9_poweroff;
 352         at91_extern_irq = (1 << AT91CAP9_ID_IRQ0) | (1 << AT91CAP9_ID_IRQ1);
 353
 354         /* Init clock subsystem */
 355         at91_clock_init(main_clock);
 356
 357         /* Register the processor-specific clocks */
 358         at91cap9_register_clocks();
 359
 360         /* Register GPIO subsystem */
 361         at91_gpio_init(at91cap9_gpio, 4);
 362
 363         /* Remember the silicon revision */
 364         if (cpu_is_at91cap9_revB())
 365                 system_rev = 0xB;
 366         else if (cpu_is_at91cap9_revC())
 367                 system_rev = 0xC;
 368 }
 369
 370 /* --------------------------------------------------------------------
 371  *  Interrupt initialization
 372  * -------------------------------------------------------------------- */
 373
 374 /*
 375  * The default interrupt priority levels (0 = lowest, 7 = highest).
 376  */
 377 static unsigned int at91cap9_default_irq_priority[NR_AIC_IRQS] __initdata = {
 378         7,      /* Advanced Interrupt Controller (FIQ) */
 379         7,      /* System Peripherals */
 380         1,      /* Parallel IO Controller A, B, C and D */
 381         0,      /* MP Block Peripheral 0 */
 382         0,      /* MP Block Peripheral 1 */
 383         0,      /* MP Block Peripheral 2 */
 384         0,      /* MP Block Peripheral 3 */
 385         0,      /* MP Block Peripheral 4 */
 386         5,      /* USART 0 */
 387         5,      /* USART 1 */
 388         5,      /* USART 2 */
 389         0,      /* Multimedia Card Interface 0 */
 390         0,      /* Multimedia Card Interface 1 */
 391         3,      /* CAN */
 392         6,      /* Two-Wire Interface */
 393         5,      /* Serial Peripheral Interface 0 */
 394         5,      /* Serial Peripheral Interface 1 */
 395         4,      /* Serial Synchronous Controller 0 */
 396         4,      /* Serial Synchronous Controller 1 */
 397         5,      /* AC97 Controller */
 398         0,      /* Timer Counter 0, 1 and 2 */
 399         0,      /* Pulse Width Modulation Controller */
 400         3,      /* Ethernet */
 401         0,      /* Advanced Encryption Standard, Triple DES*/
 402         0,      /* Analog-to-Digital Converter */
 403         0,      /* Image Sensor Interface */
 404         3,      /* LCD Controller */
 405         0,      /* DMA Controller */
 406         2,      /* USB Device Port */
 407         2,      /* USB Host port */
 408         0,      /* Advanced Interrupt Controller (IRQ0) */
 409         0,      /* Advanced Interrupt Controller (IRQ1) */
 410 };
 411
 412 void __init at91cap9_init_interrupts(unsigned int priority[NR_AIC_IRQS])
 413 {
 414         if (!priority)
 415                 priority = at91cap9_default_irq_priority;
 416
 417         /* Initialize the AIC interrupt controller */
 418         at91_aic_init(priority);
 419
 420         /* Enable GPIO interrupts */
 421         at91_gpio_irq_setup();
 422 }