arch/arm/mach-at91rm9200/at91sam9260.c

   1 /*
   2  * arch/arm/mach-at91rm9200/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 ohci_clk = {
 111         .name           = "ohci_clk",
 112         .pmc_mask       = 1 << AT91SAM9260_ID_UHP,
 113         .type           = CLK_TYPE_PERIPHERAL,
 114 };
 115 static struct clk ether_clk = {
 116         .name           = "ether_clk",
 117         .pmc_mask       = 1 << AT91SAM9260_ID_EMAC,
 118         .type           = CLK_TYPE_PERIPHERAL,
 119 };
 120 static struct clk isi_clk = {
 121         .name           = "isi_clk",
 122         .pmc_mask       = 1 << AT91SAM9260_ID_ISI,
 123         .type           = CLK_TYPE_PERIPHERAL,
 124 };
 125 static struct clk usart3_clk = {
 126         .name           = "usart3_clk",
 127         .pmc_mask       = 1 << AT91SAM9260_ID_US3,
 128         .type           = CLK_TYPE_PERIPHERAL,
 129 };
 130 static struct clk usart4_clk = {
 131         .name           = "usart4_clk",
 132         .pmc_mask       = 1 << AT91SAM9260_ID_US4,
 133         .type           = CLK_TYPE_PERIPHERAL,
 134 };
 135 static struct clk usart5_clk = {
 136         .name           = "usart5_clk",
 137         .pmc_mask       = 1 << AT91SAM9260_ID_US5,
 138         .type           = CLK_TYPE_PERIPHERAL,
 139 };
 140
 141 static struct clk *periph_clocks[] __initdata = {
 142         &pioA_clk,
 143         &pioB_clk,
 144         &pioC_clk,
 145         &adc_clk,
 146         &usart0_clk,
 147         &usart1_clk,
 148         &usart2_clk,
 149         &mmc_clk,
 150         &udc_clk,
 151         &twi_clk,
 152         &spi0_clk,
 153         &spi1_clk,
 154         // ssc
 155         // tc0 .. tc2
 156         &ohci_clk,
 157         &ether_clk,
 158         &isi_clk,
 159         &usart3_clk,
 160         &usart4_clk,
 161         &usart5_clk,
 162         // tc3 .. tc5
 163         // irq0 .. irq2
 164 };
 165
 166 /*
 167  * The two programmable clocks.
 168  * You must configure pin multiplexing to bring these signals out.
 169  */
 170 static struct clk pck0 = {
 171         .name           = "pck0",
 172         .pmc_mask       = AT91_PMC_PCK0,
 173         .type           = CLK_TYPE_PROGRAMMABLE,
 174         .id             = 0,
 175 };
 176 static struct clk pck1 = {
 177         .name           = "pck1",
 178         .pmc_mask       = AT91_PMC_PCK1,
 179         .type           = CLK_TYPE_PROGRAMMABLE,
 180         .id             = 1,
 181 };
 182
 183 static void __init at91sam9260_register_clocks(void)
 184 {
 185         int i;
 186
 187         for (i = 0; i < ARRAY_SIZE(periph_clocks); i++)
 188                 clk_register(periph_clocks[i]);
 189
 190         clk_register(&pck0);
 191         clk_register(&pck1);
 192 }
 193
 194 /* --------------------------------------------------------------------
 195  *  GPIO
 196  * -------------------------------------------------------------------- */
 197
 198 static struct at91_gpio_bank at91sam9260_gpio[] = {
 199         {
 200                 .id             = AT91SAM9260_ID_PIOA,
 201                 .offset         = AT91_PIOA,
 202                 .clock          = &pioA_clk,
 203         }, {
 204                 .id             = AT91SAM9260_ID_PIOB,
 205                 .offset         = AT91_PIOB,
 206                 .clock          = &pioB_clk,
 207         }, {
 208                 .id             = AT91SAM9260_ID_PIOC,
 209                 .offset         = AT91_PIOC,
 210                 .clock          = &pioC_clk,
 211         }
 212 };
 213
 214 static void at91sam9260_reset(void)
 215 {
 216         at91_sys_write(AT91_RSTC_CR, (0xA5 << 24) | AT91_RSTC_PROCRST | AT91_RSTC_PERRST);
 217 }
 218
 219
 220 /* --------------------------------------------------------------------
 221  *  AT91SAM9260 processor initialization
 222  * -------------------------------------------------------------------- */
 223
 224 void __init at91sam9260_initialize(unsigned long main_clock)
 225 {
 226         /* Map peripherals */
 227         iotable_init(at91sam9260_io_desc, ARRAY_SIZE(at91sam9260_io_desc));
 228
 229         at91_arch_reset = at91sam9260_reset;
 230         at91_extern_irq = (1 << AT91SAM9260_ID_IRQ0) | (1 << AT91SAM9260_ID_IRQ1)
 231                         | (1 << AT91SAM9260_ID_IRQ2);
 232
 233         /* Init clock subsystem */
 234         at91_clock_init(main_clock);
 235
 236         /* Register the processor-specific clocks */
 237         at91sam9260_register_clocks();
 238
 239         /* Register GPIO subsystem */
 240         at91_gpio_init(at91sam9260_gpio, 3);
 241 }
 242
 243 /* --------------------------------------------------------------------
 244  *  Interrupt initialization
 245  * -------------------------------------------------------------------- */
 246
 247 /*
 248  * The default interrupt priority levels (0 = lowest, 7 = highest).
 249  */
 250 static unsigned int at91sam9260_default_irq_priority[NR_AIC_IRQS] __initdata = {
 251         7,      /* Advanced Interrupt Controller */
 252         7,      /* System Peripherals */
 253         0,      /* Parallel IO Controller A */
 254         0,      /* Parallel IO Controller B */
 255         0,      /* Parallel IO Controller C */
 256         0,      /* Analog-to-Digital Converter */
 257         6,      /* USART 0 */
 258         6,      /* USART 1 */
 259         6,      /* USART 2 */
 260         0,      /* Multimedia Card Interface */
 261         4,      /* USB Device Port */
 262         0,      /* Two-Wire Interface */
 263         6,      /* Serial Peripheral Interface 0 */
 264         6,      /* Serial Peripheral Interface 1 */
 265         5,      /* Serial Synchronous Controller */
 266         0,
 267         0,
 268         0,      /* Timer Counter 0 */
 269         0,      /* Timer Counter 1 */
 270         0,      /* Timer Counter 2 */
 271         3,      /* USB Host port */
 272         3,      /* Ethernet */
 273         0,      /* Image Sensor Interface */
 274         6,      /* USART 3 */
 275         6,      /* USART 4 */
 276         6,      /* USART 5 */
 277         0,      /* Timer Counter 3 */
 278         0,      /* Timer Counter 4 */
 279         0,      /* Timer Counter 5 */
 280         0,      /* Advanced Interrupt Controller */
 281         0,      /* Advanced Interrupt Controller */
 282         0,      /* Advanced Interrupt Controller */
 283 };
 284
 285 void __init at91sam9260_init_interrupts(unsigned int priority[NR_AIC_IRQS])
 286 {
 287         if (!priority)
 288                 priority = at91sam9260_default_irq_priority;
 289
 290         /* Initialize the AIC interrupt controller */
 291         at91_aic_init(priority);
 292
 293         /* Enable GPIO interrupts */
 294         at91_gpio_irq_setup();
 295 }