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/proc-fns.h>
  15 #include <asm/irq.h>
  16 #include <asm/mach/arch.h>
  17 #include <asm/mach/map.h>
  18 #include <asm/system_misc.h>
  19 #include <mach/cpu.h>
  20 #include <mach/at91_dbgu.h>
  21 #include <mach/at91sam9rl.h>
  22 #include <mach/at91_pmc.h>
  23
  24 #include "at91_aic.h"
  25 #include "at91_rstc.h"
  26 #include "soc.h"
  27 #include "generic.h"
  28 #include "clock.h"
  29 #include "sam9_smc.h"
  30
  31 /* --------------------------------------------------------------------
  32  *  Clocks
  33  * -------------------------------------------------------------------- */
  34
  35 /*
  36  * The peripheral clocks.
  37  */
  38 static struct clk pioA_clk = {
  39         .name           = "pioA_clk",
  40         .pmc_mask       = 1 << AT91SAM9RL_ID_PIOA,
  41         .type           = CLK_TYPE_PERIPHERAL,
  42 };
  43 static struct clk pioB_clk = {
  44         .name           = "pioB_clk",
  45         .pmc_mask       = 1 << AT91SAM9RL_ID_PIOB,
  46         .type           = CLK_TYPE_PERIPHERAL,
  47 };
  48 static struct clk pioC_clk = {
  49         .name           = "pioC_clk",
  50         .pmc_mask       = 1 << AT91SAM9RL_ID_PIOC,
  51         .type           = CLK_TYPE_PERIPHERAL,
  52 };
  53 static struct clk pioD_clk = {
  54         .name           = "pioD_clk",
  55         .pmc_mask       = 1 << AT91SAM9RL_ID_PIOD,
  56         .type           = CLK_TYPE_PERIPHERAL,
  57 };
  58 static struct clk usart0_clk = {
  59         .name           = "usart0_clk",
  60         .pmc_mask       = 1 << AT91SAM9RL_ID_US0,
  61         .type           = CLK_TYPE_PERIPHERAL,
  62 };
  63 static struct clk usart1_clk = {
  64         .name           = "usart1_clk",
  65         .pmc_mask       = 1 << AT91SAM9RL_ID_US1,
  66         .type           = CLK_TYPE_PERIPHERAL,
  67 };
  68 static struct clk usart2_clk = {
  69         .name           = "usart2_clk",
  70         .pmc_mask       = 1 << AT91SAM9RL_ID_US2,
  71         .type           = CLK_TYPE_PERIPHERAL,
  72 };
  73 static struct clk usart3_clk = {
  74         .name           = "usart3_clk",
  75         .pmc_mask       = 1 << AT91SAM9RL_ID_US3,
  76         .type           = CLK_TYPE_PERIPHERAL,
  77 };
  78 static struct clk mmc_clk = {
  79         .name           = "mci_clk",
  80         .pmc_mask       = 1 << AT91SAM9RL_ID_MCI,
  81         .type           = CLK_TYPE_PERIPHERAL,
  82 };
  83 static struct clk twi0_clk = {
  84         .name           = "twi0_clk",
  85         .pmc_mask       = 1 << AT91SAM9RL_ID_TWI0,
  86         .type           = CLK_TYPE_PERIPHERAL,
  87 };
  88 static struct clk twi1_clk = {
  89         .name           = "twi1_clk",
  90         .pmc_mask       = 1 << AT91SAM9RL_ID_TWI1,
  91         .type           = CLK_TYPE_PERIPHERAL,
  92 };
  93 static struct clk spi_clk = {
  94         .name           = "spi_clk",
  95         .pmc_mask       = 1 << AT91SAM9RL_ID_SPI,
  96         .type           = CLK_TYPE_PERIPHERAL,
  97 };
  98 static struct clk ssc0_clk = {
  99         .name           = "ssc0_clk",
 100         .pmc_mask       = 1 << AT91SAM9RL_ID_SSC0,
 101         .type           = CLK_TYPE_PERIPHERAL,
 102 };
 103 static struct clk ssc1_clk = {
 104         .name           = "ssc1_clk",
 105         .pmc_mask       = 1 << AT91SAM9RL_ID_SSC1,
 106         .type           = CLK_TYPE_PERIPHERAL,
 107 };
 108 static struct clk tc0_clk = {
 109         .name           = "tc0_clk",
 110         .pmc_mask       = 1 << AT91SAM9RL_ID_TC0,
 111         .type           = CLK_TYPE_PERIPHERAL,
 112 };
 113 static struct clk tc1_clk = {
 114         .name           = "tc1_clk",
 115         .pmc_mask       = 1 << AT91SAM9RL_ID_TC1,
 116         .type           = CLK_TYPE_PERIPHERAL,
 117 };
 118 static struct clk tc2_clk = {
 119         .name           = "tc2_clk",
 120         .pmc_mask       = 1 << AT91SAM9RL_ID_TC2,
 121         .type           = CLK_TYPE_PERIPHERAL,
 122 };
 123 static struct clk pwm_clk = {
 124         .name           = "pwm_clk",
 125         .pmc_mask       = 1 << AT91SAM9RL_ID_PWMC,
 126         .type           = CLK_TYPE_PERIPHERAL,
 127 };
 128 static struct clk tsc_clk = {
 129         .name           = "tsc_clk",
 130         .pmc_mask       = 1 << AT91SAM9RL_ID_TSC,
 131         .type           = CLK_TYPE_PERIPHERAL,
 132 };
 133 static struct clk dma_clk = {
 134         .name           = "dma_clk",
 135         .pmc_mask       = 1 << AT91SAM9RL_ID_DMA,
 136         .type           = CLK_TYPE_PERIPHERAL,
 137 };
 138 static struct clk udphs_clk = {
 139         .name           = "udphs_clk",
 140         .pmc_mask       = 1 << AT91SAM9RL_ID_UDPHS,
 141         .type           = CLK_TYPE_PERIPHERAL,
 142 };
 143 static struct clk lcdc_clk = {
 144         .name           = "lcdc_clk",
 145         .pmc_mask       = 1 << AT91SAM9RL_ID_LCDC,
 146         .type           = CLK_TYPE_PERIPHERAL,
 147 };
 148 static struct clk ac97_clk = {
 149         .name           = "ac97_clk",
 150         .pmc_mask       = 1 << AT91SAM9RL_ID_AC97C,
 151         .type           = CLK_TYPE_PERIPHERAL,
 152 };
 153
 154 static struct clk *periph_clocks[] __initdata = {
 155         &pioA_clk,
 156         &pioB_clk,
 157         &pioC_clk,
 158         &pioD_clk,
 159         &usart0_clk,
 160         &usart1_clk,
 161         &usart2_clk,
 162         &usart3_clk,
 163         &mmc_clk,
 164         &twi0_clk,
 165         &twi1_clk,
 166         &spi_clk,
 167         &ssc0_clk,
 168         &ssc1_clk,
 169         &tc0_clk,
 170         &tc1_clk,
 171         &tc2_clk,
 172         &pwm_clk,
 173         &tsc_clk,
 174         &dma_clk,
 175         &udphs_clk,
 176         &lcdc_clk,
 177         &ac97_clk,
 178         // irq0
 179 };
 180
 181 static struct clk_lookup periph_clocks_lookups[] = {
 182         CLKDEV_CON_DEV_ID("hclk", "atmel_usba_udc", &utmi_clk),
 183         CLKDEV_CON_DEV_ID("pclk", "atmel_usba_udc", &udphs_clk),
 184         CLKDEV_CON_DEV_ID("t0_clk", "atmel_tcb.0", &tc0_clk),
 185         CLKDEV_CON_DEV_ID("t1_clk", "atmel_tcb.0", &tc1_clk),
 186         CLKDEV_CON_DEV_ID("t2_clk", "atmel_tcb.0", &tc2_clk),
 187         CLKDEV_CON_DEV_ID("pclk", "at91rm9200_ssc.0", &ssc0_clk),
 188         CLKDEV_CON_DEV_ID("pclk", "at91rm9200_ssc.1", &ssc1_clk),
 189         CLKDEV_CON_DEV_ID("pclk", "fffc0000.ssc", &ssc0_clk),
 190         CLKDEV_CON_DEV_ID("pclk", "fffc4000.ssc", &ssc1_clk),
 191         CLKDEV_CON_DEV_ID(NULL, "i2c-at91sam9g20.0", &twi0_clk),
 192         CLKDEV_CON_DEV_ID(NULL, "i2c-at91sam9g20.1", &twi1_clk),
 193         CLKDEV_CON_ID("pioA", &pioA_clk),
 194         CLKDEV_CON_ID("pioB", &pioB_clk),
 195         CLKDEV_CON_ID("pioC", &pioC_clk),
 196         CLKDEV_CON_ID("pioD", &pioD_clk),
 197 };
 198
 199 static struct clk_lookup usart_clocks_lookups[] = {
 200         CLKDEV_CON_DEV_ID("usart", "atmel_usart.0", &mck),
 201         CLKDEV_CON_DEV_ID("usart", "atmel_usart.1", &usart0_clk),
 202         CLKDEV_CON_DEV_ID("usart", "atmel_usart.2", &usart1_clk),
 203         CLKDEV_CON_DEV_ID("usart", "atmel_usart.3", &usart2_clk),
 204         CLKDEV_CON_DEV_ID("usart", "atmel_usart.4", &usart3_clk),
 205 };
 206
 207 /*
 208  * The two programmable clocks.
 209  * You must configure pin multiplexing to bring these signals out.
 210  */
 211 static struct clk pck0 = {
 212         .name           = "pck0",
 213         .pmc_mask       = AT91_PMC_PCK0,
 214         .type           = CLK_TYPE_PROGRAMMABLE,
 215         .id             = 0,
 216 };
 217 static struct clk pck1 = {
 218         .name           = "pck1",
 219         .pmc_mask       = AT91_PMC_PCK1,
 220         .type           = CLK_TYPE_PROGRAMMABLE,
 221         .id             = 1,
 222 };
 223
 224 static void __init at91sam9rl_register_clocks(void)
 225 {
 226         int i;
 227
 228         for (i = 0; i < ARRAY_SIZE(periph_clocks); i++)
 229                 clk_register(periph_clocks[i]);
 230
 231         clkdev_add_table(periph_clocks_lookups,
 232                          ARRAY_SIZE(periph_clocks_lookups));
 233         clkdev_add_table(usart_clocks_lookups,
 234                          ARRAY_SIZE(usart_clocks_lookups));
 235
 236         clk_register(&pck0);
 237         clk_register(&pck1);
 238 }
 239
 240 /* --------------------------------------------------------------------
 241  *  GPIO
 242  * -------------------------------------------------------------------- */
 243
 244 static struct at91_gpio_bank at91sam9rl_gpio[] __initdata = {
 245         {
 246                 .id             = AT91SAM9RL_ID_PIOA,
 247                 .regbase        = AT91SAM9RL_BASE_PIOA,
 248         }, {
 249                 .id             = AT91SAM9RL_ID_PIOB,
 250                 .regbase        = AT91SAM9RL_BASE_PIOB,
 251         }, {
 252                 .id             = AT91SAM9RL_ID_PIOC,
 253                 .regbase        = AT91SAM9RL_BASE_PIOC,
 254         }, {
 255                 .id             = AT91SAM9RL_ID_PIOD,
 256                 .regbase        = AT91SAM9RL_BASE_PIOD,
 257         }
 258 };
 259
 260 /* --------------------------------------------------------------------
 261  *  AT91SAM9RL processor initialization
 262  * -------------------------------------------------------------------- */
 263
 264 static void __init at91sam9rl_map_io(void)
 265 {
 266         unsigned long sram_size;
 267
 268         switch (at91_soc_initdata.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         /* Map SRAM */
 278         at91_init_sram(0, AT91SAM9RL_SRAM_BASE, sram_size);
 279 }
 280
 281 static void __init at91sam9rl_ioremap_registers(void)
 282 {
 283         at91_ioremap_shdwc(AT91SAM9RL_BASE_SHDWC);
 284         at91_ioremap_rstc(AT91SAM9RL_BASE_RSTC);
 285         at91_ioremap_ramc(0, AT91SAM9RL_BASE_SDRAMC, 512);
 286         at91sam926x_ioremap_pit(AT91SAM9RL_BASE_PIT);
 287         at91sam9_ioremap_smc(0, AT91SAM9RL_BASE_SMC);
 288         at91_ioremap_matrix(AT91SAM9RL_BASE_MATRIX);
 289 }
 290
 291 static void __init at91sam9rl_initialize(void)
 292 {
 293         arm_pm_idle = at91sam9_idle;
 294         arm_pm_restart = at91sam9_alt_restart;
 295         at91_extern_irq = (1 << AT91SAM9RL_ID_IRQ0);
 296
 297         /* Register GPIO subsystem */
 298         at91_gpio_init(at91sam9rl_gpio, 4);
 299 }
 300
 301 /* --------------------------------------------------------------------
 302  *  Interrupt initialization
 303  * -------------------------------------------------------------------- */
 304
 305 /*
 306  * The default interrupt priority levels (0 = lowest, 7 = highest).
 307  */
 308 static unsigned int at91sam9rl_default_irq_priority[NR_AIC_IRQS] __initdata = {
 309         7,      /* Advanced Interrupt Controller */
 310         7,      /* System Peripherals */
 311         1,      /* Parallel IO Controller A */
 312         1,      /* Parallel IO Controller B */
 313         1,      /* Parallel IO Controller C */
 314         1,      /* Parallel IO Controller D */
 315         5,      /* USART 0 */
 316         5,      /* USART 1 */
 317         5,      /* USART 2 */
 318         5,      /* USART 3 */
 319         0,      /* Multimedia Card Interface */
 320         6,      /* Two-Wire Interface 0 */
 321         6,      /* Two-Wire Interface 1 */
 322         5,      /* Serial Peripheral Interface */
 323         4,      /* Serial Synchronous Controller 0 */
 324         4,      /* Serial Synchronous Controller 1 */
 325         0,      /* Timer Counter 0 */
 326         0,      /* Timer Counter 1 */
 327         0,      /* Timer Counter 2 */
 328         0,
 329         0,      /* Touch Screen Controller */
 330         0,      /* DMA Controller */
 331         2,      /* USB Device High speed port */
 332         2,      /* LCD Controller */
 333         6,      /* AC97 Controller */
 334         0,
 335         0,
 336         0,
 337         0,
 338         0,
 339         0,
 340         0,      /* Advanced Interrupt Controller */
 341 };
 342
 343 AT91_SOC_START(sam9rl)
 344         .map_io = at91sam9rl_map_io,
 345         .default_irq_priority = at91sam9rl_default_irq_priority,
 346         .ioremap_registers = at91sam9rl_ioremap_registers,
 347         .register_clocks = at91sam9rl_register_clocks,
 348         .init = at91sam9rl_initialize,
 349 AT91_SOC_END