arch/arm/mach-at91/at91sam9260.c

   1 /*
   2  * arch/arm/mach-at91/at91sam9260.c
   3  *
   4  *  Copyright (C) 2006 SAN People
   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
  15 #include <asm/mach/arch.h>
  16 #include <asm/mach/map.h>
  17 #include <asm/arch/at91sam9260.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 at91sam9260_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                 .virtual        = AT91_IO_VIRT_BASE - AT91SAM9260_SRAM0_SIZE,
  32                 .pfn            = __phys_to_pfn(AT91SAM9260_SRAM0_BASE),
  33                 .length         = AT91SAM9260_SRAM0_SIZE,
  34                 .type           = MT_DEVICE,
  35         }, {
  36                 .virtual        = AT91_IO_VIRT_BASE - AT91SAM9260_SRAM0_SIZE - AT91SAM9260_SRAM1_SIZE,
  37                 .pfn            = __phys_to_pfn(AT91SAM9260_SRAM1_BASE),
  38                 .length         = AT91SAM9260_SRAM1_SIZE,
  39                 .type           = MT_DEVICE,
  40         },
  41 };
  42
  43 /* --------------------------------------------------------------------
  44  *  Clocks
  45  * -------------------------------------------------------------------- */
  46
  47 /*
  48  * The peripheral clocks.
  49  */
  50 static struct clk pioA_clk = {
  51         .name           = "pioA_clk",
  52         .pmc_mask       = 1 << AT91SAM9260_ID_PIOA,
  53         .type           = CLK_TYPE_PERIPHERAL,
  54 };
  55 static struct clk pioB_clk = {
  56         .name           = "pioB_clk",
  57         .pmc_mask       = 1 << AT91SAM9260_ID_PIOB,
  58         .type           = CLK_TYPE_PERIPHERAL,
  59 };
  60 static struct clk pioC_clk = {
  61         .name           = "pioC_clk",
  62         .pmc_mask       = 1 << AT91SAM9260_ID_PIOC,
  63         .type           = CLK_TYPE_PERIPHERAL,
  64 };
  65 static struct clk adc_clk = {
  66         .name           = "adc_clk",
  67         .pmc_mask       = 1 << AT91SAM9260_ID_ADC,
  68         .type           = CLK_TYPE_PERIPHERAL,
  69 };
  70 static struct clk usart0_clk = {
  71         .name           = "usart0_clk",
  72         .pmc_mask       = 1 << AT91SAM9260_ID_US0,
  73         .type           = CLK_TYPE_PERIPHERAL,
  74 };
  75 static struct clk usart1_clk = {
  76         .name           = "usart1_clk",
  77         .pmc_mask       = 1 << AT91SAM9260_ID_US1,
  78         .type           = CLK_TYPE_PERIPHERAL,
  79 };
  80 static struct clk usart2_clk = {
  81         .name           = "usart2_clk",
  82         .pmc_mask       = 1 << AT91SAM9260_ID_US2,
  83         .type           = CLK_TYPE_PERIPHERAL,
  84 };
  85 static struct clk mmc_clk = {
  86         .name           = "mci_clk",
  87         .pmc_mask       = 1 << AT91SAM9260_ID_MCI,
  88         .type           = CLK_TYPE_PERIPHERAL,
  89 };
  90 static struct clk udc_clk = {
  91         .name           = "udc_clk",
  92         .pmc_mask       = 1 << AT91SAM9260_ID_UDP,
  93         .type           = CLK_TYPE_PERIPHERAL,
  94 };
  95 static struct clk twi_clk = {
  96         .name           = "twi_clk",
  97         .pmc_mask       = 1 << AT91SAM9260_ID_TWI,
  98         .type           = CLK_TYPE_PERIPHERAL,
  99 };
 100 static struct clk spi0_clk = {
 101         .name           = "spi0_clk",
 102         .pmc_mask       = 1 << AT91SAM9260_ID_SPI0,
 103         .type           = CLK_TYPE_PERIPHERAL,
 104 };
 105 static struct clk spi1_clk = {
 106         .name           = "spi1_clk",
 107         .pmc_mask       = 1 << AT91SAM9260_ID_SPI1,
 108         .type           = CLK_TYPE_PERIPHERAL,
 109 };
 110 static struct clk tc0_clk = {
 111         .name           = "tc0_clk",
 112         .pmc_mask       = 1 << AT91SAM9260_ID_TC0,
 113         .type           = CLK_TYPE_PERIPHERAL,
 114 };
 115 static struct clk tc1_clk = {
 116         .name           = "tc1_clk",
 117         .pmc_mask       = 1 << AT91SAM9260_ID_TC1,
 118         .type           = CLK_TYPE_PERIPHERAL,
 119 };
 120 static struct clk tc2_clk = {
 121         .name           = "tc2_clk",
 122         .pmc_mask       = 1 << AT91SAM9260_ID_TC2,
 123         .type           = CLK_TYPE_PERIPHERAL,
 124 };
 125 static struct clk ohci_clk = {
 126         .name           = "ohci_clk",
 127         .pmc_mask       = 1 << AT91SAM9260_ID_UHP,
 128         .type           = CLK_TYPE_PERIPHERAL,
 129 };
 130 static struct clk ether_clk = {
 131         .name           = "ether_clk",
 132         .pmc_mask       = 1 << AT91SAM9260_ID_EMAC,
 133         .type           = CLK_TYPE_PERIPHERAL,
 134 };
 135 static struct clk isi_clk = {
 136         .name           = "isi_clk",
 137         .pmc_mask       = 1 << AT91SAM9260_ID_ISI,
 138         .type           = CLK_TYPE_PERIPHERAL,
 139 };
 140 static struct clk usart3_clk = {
 141         .name           = "usart3_clk",
 142         .pmc_mask       = 1 << AT91SAM9260_ID_US3,
 143         .type           = CLK_TYPE_PERIPHERAL,
 144 };
 145 static struct clk usart4_clk = {
 146         .name           = "usart4_clk",
 147         .pmc_mask       = 1 << AT91SAM9260_ID_US4,
 148         .type           = CLK_TYPE_PERIPHERAL,
 149 };
 150 static struct clk usart5_clk = {
 151         .name           = "usart5_clk",
 152         .pmc_mask       = 1 << AT91SAM9260_ID_US5,
 153         .type           = CLK_TYPE_PERIPHERAL,
 154 };
 155 static struct clk tc3_clk = {
 156         .name           = "tc3_clk",
 157         .pmc_mask       = 1 << AT91SAM9260_ID_TC3,
 158         .type           = CLK_TYPE_PERIPHERAL,
 159 };
 160 static struct clk tc4_clk = {
 161         .name           = "tc4_clk",
 162         .pmc_mask       = 1 << AT91SAM9260_ID_TC4,
 163         .type           = CLK_TYPE_PERIPHERAL,
 164 };
 165 static struct clk tc5_clk = {
 166         .name           = "tc5_clk",
 167         .pmc_mask       = 1 << AT91SAM9260_ID_TC5,
 168         .type           = CLK_TYPE_PERIPHERAL,
 169 };
 170
 171 static struct clk *periph_clocks[] __initdata = {
 172         &pioA_clk,
 173         &pioB_clk,
 174         &pioC_clk,
 175         &adc_clk,
 176         &usart0_clk,
 177         &usart1_clk,
 178         &usart2_clk,
 179         &mmc_clk,
 180         &udc_clk,
 181         &twi_clk,
 182         &spi0_clk,
 183         &spi1_clk,
 184         // ssc
 185         &tc0_clk,
 186         &tc1_clk,
 187         &tc2_clk,
 188         &ohci_clk,
 189         &ether_clk,
 190         &isi_clk,
 191         &usart3_clk,
 192         &usart4_clk,
 193         &usart5_clk,
 194         &tc3_clk,
 195         &tc4_clk,
 196         &tc5_clk,
 197         // irq0 .. irq2
 198 };
 199
 200 /*
 201  * The two programmable clocks.
 202  * You must configure pin multiplexing to bring these signals out.
 203  */
 204 static struct clk pck0 = {
 205         .name           = "pck0",
 206         .pmc_mask       = AT91_PMC_PCK0,
 207         .type           = CLK_TYPE_PROGRAMMABLE,
 208         .id             = 0,
 209 };
 210 static struct clk pck1 = {
 211         .name           = "pck1",
 212         .pmc_mask       = AT91_PMC_PCK1,
 213         .type           = CLK_TYPE_PROGRAMMABLE,
 214         .id             = 1,
 215 };
 216
 217 static void __init at91sam9260_register_clocks(void)
 218 {
 219         int i;
 220
 221         for (i = 0; i < ARRAY_SIZE(periph_clocks); i++)
 222                 clk_register(periph_clocks[i]);
 223
 224         clk_register(&pck0);
 225         clk_register(&pck1);
 226 }
 227
 228 /* --------------------------------------------------------------------
 229  *  GPIO
 230  * -------------------------------------------------------------------- */
 231
 232 static struct at91_gpio_bank at91sam9260_gpio[] = {
 233         {
 234                 .id             = AT91SAM9260_ID_PIOA,
 235                 .offset         = AT91_PIOA,
 236                 .clock          = &pioA_clk,
 237         }, {
 238                 .id             = AT91SAM9260_ID_PIOB,
 239                 .offset         = AT91_PIOB,
 240                 .clock          = &pioB_clk,
 241         }, {
 242                 .id             = AT91SAM9260_ID_PIOC,
 243                 .offset         = AT91_PIOC,
 244                 .clock          = &pioC_clk,
 245         }
 246 };
 247
 248 static void at91sam9260_reset(void)
 249 {
 250         at91_sys_write(AT91_RSTC_CR, (0xA5 << 24) | AT91_RSTC_PROCRST | AT91_RSTC_PERRST);
 251 }
 252
 253
 254 /* --------------------------------------------------------------------
 255  *  AT91SAM9260 processor initialization
 256  * -------------------------------------------------------------------- */
 257
 258 void __init at91sam9260_initialize(unsigned long main_clock)
 259 {
 260         /* Map peripherals */
 261         iotable_init(at91sam9260_io_desc, ARRAY_SIZE(at91sam9260_io_desc));
 262
 263         at91_arch_reset = at91sam9260_reset;
 264         at91_extern_irq = (1 << AT91SAM9260_ID_IRQ0) | (1 << AT91SAM9260_ID_IRQ1)
 265                         | (1 << AT91SAM9260_ID_IRQ2);
 266
 267         /* Init clock subsystem */
 268         at91_clock_init(main_clock);
 269
 270         /* Register the processor-specific clocks */
 271         at91sam9260_register_clocks();
 272
 273         /* Register GPIO subsystem */
 274         at91_gpio_init(at91sam9260_gpio, 3);
 275 }
 276
 277 /* --------------------------------------------------------------------
 278  *  Interrupt initialization
 279  * -------------------------------------------------------------------- */
 280
 281 /*
 282  * The default interrupt priority levels (0 = lowest, 7 = highest).
 283  */
 284 static unsigned int at91sam9260_default_irq_priority[NR_AIC_IRQS] __initdata = {
 285         7,      /* Advanced Interrupt Controller */
 286         7,      /* System Peripherals */
 287         0,      /* Parallel IO Controller A */
 288         0,      /* Parallel IO Controller B */
 289         0,      /* Parallel IO Controller C */
 290         0,      /* Analog-to-Digital Converter */
 291         6,      /* USART 0 */
 292         6,      /* USART 1 */
 293         6,      /* USART 2 */
 294         0,      /* Multimedia Card Interface */
 295         4,      /* USB Device Port */
 296         0,      /* Two-Wire Interface */
 297         6,      /* Serial Peripheral Interface 0 */
 298         6,      /* Serial Peripheral Interface 1 */
 299         5,      /* Serial Synchronous Controller */
 300         0,
 301         0,
 302         0,      /* Timer Counter 0 */
 303         0,      /* Timer Counter 1 */
 304         0,      /* Timer Counter 2 */
 305         3,      /* USB Host port */
 306         3,      /* Ethernet */
 307         0,      /* Image Sensor Interface */
 308         6,      /* USART 3 */
 309         6,      /* USART 4 */
 310         6,      /* USART 5 */
 311         0,      /* Timer Counter 3 */
 312         0,      /* Timer Counter 4 */
 313         0,      /* Timer Counter 5 */
 314         0,      /* Advanced Interrupt Controller */
 315         0,      /* Advanced Interrupt Controller */
 316         0,      /* Advanced Interrupt Controller */
 317 };
 318
 319 void __init at91sam9260_init_interrupts(unsigned int priority[NR_AIC_IRQS])
 320 {
 321         if (!priority)
 322                 priority = at91sam9260_default_irq_priority;
 323
 324         /* Initialize the AIC interrupt controller */
 325         at91_aic_init(priority);
 326
 327         /* Enable GPIO interrupts */
 328         at91_gpio_irq_setup();
 329 }