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 #include <linux/pm.h>
  14
  15 #include <asm/irq.h>
  16 #include <asm/mach/arch.h>
  17 #include <asm/mach/map.h>
  18 #include <mach/cpu.h>
  19 #include <mach/at91_dbgu.h>
  20 #include <mach/at91sam9rl.h>
  21 #include <mach/at91_pmc.h>
  22 #include <mach/at91_rstc.h>
  23 #include <mach/at91_shdwc.h>
  24
  25 #include "soc.h"
  26 #include "generic.h"
  27 #include "clock.h"
  28
  29 /* --------------------------------------------------------------------
  30  *  Clocks
  31  * -------------------------------------------------------------------- */
  32
  33 /*
  34  * The peripheral clocks.
  35  */
  36 static struct clk pioA_clk = {
  37         .name           = "pioA_clk",
  38         .pmc_mask       = 1 << AT91SAM9RL_ID_PIOA,
  39         .type           = CLK_TYPE_PERIPHERAL,
  40 };
  41 static struct clk pioB_clk = {
  42         .name           = "pioB_clk",
  43         .pmc_mask       = 1 << AT91SAM9RL_ID_PIOB,
  44         .type           = CLK_TYPE_PERIPHERAL,
  45 };
  46 static struct clk pioC_clk = {
  47         .name           = "pioC_clk",
  48         .pmc_mask       = 1 << AT91SAM9RL_ID_PIOC,
  49         .type           = CLK_TYPE_PERIPHERAL,
  50 };
  51 static struct clk pioD_clk = {
  52         .name           = "pioD_clk",
  53         .pmc_mask       = 1 << AT91SAM9RL_ID_PIOD,
  54         .type           = CLK_TYPE_PERIPHERAL,
  55 };
  56 static struct clk usart0_clk = {
  57         .name           = "usart0_clk",
  58         .pmc_mask       = 1 << AT91SAM9RL_ID_US0,
  59         .type           = CLK_TYPE_PERIPHERAL,
  60 };
  61 static struct clk usart1_clk = {
  62         .name           = "usart1_clk",
  63         .pmc_mask       = 1 << AT91SAM9RL_ID_US1,
  64         .type           = CLK_TYPE_PERIPHERAL,
  65 };
  66 static struct clk usart2_clk = {
  67         .name           = "usart2_clk",
  68         .pmc_mask       = 1 << AT91SAM9RL_ID_US2,
  69         .type           = CLK_TYPE_PERIPHERAL,
  70 };
  71 static struct clk usart3_clk = {
  72         .name           = "usart3_clk",
  73         .pmc_mask       = 1 << AT91SAM9RL_ID_US3,
  74         .type           = CLK_TYPE_PERIPHERAL,
  75 };
  76 static struct clk mmc_clk = {
  77         .name           = "mci_clk",
  78         .pmc_mask       = 1 << AT91SAM9RL_ID_MCI,
  79         .type           = CLK_TYPE_PERIPHERAL,
  80 };
  81 static struct clk twi0_clk = {
  82         .name           = "twi0_clk",
  83         .pmc_mask       = 1 << AT91SAM9RL_ID_TWI0,
  84         .type           = CLK_TYPE_PERIPHERAL,
  85 };
  86 static struct clk twi1_clk = {
  87         .name           = "twi1_clk",
  88         .pmc_mask       = 1 << AT91SAM9RL_ID_TWI1,
  89         .type           = CLK_TYPE_PERIPHERAL,
  90 };
  91 static struct clk spi_clk = {
  92         .name           = "spi_clk",
  93         .pmc_mask       = 1 << AT91SAM9RL_ID_SPI,
  94         .type           = CLK_TYPE_PERIPHERAL,
  95 };
  96 static struct clk ssc0_clk = {
  97         .name           = "ssc0_clk",
  98         .pmc_mask       = 1 << AT91SAM9RL_ID_SSC0,
  99         .type           = CLK_TYPE_PERIPHERAL,
 100 };
 101 static struct clk ssc1_clk = {
 102         .name           = "ssc1_clk",
 103         .pmc_mask       = 1 << AT91SAM9RL_ID_SSC1,
 104         .type           = CLK_TYPE_PERIPHERAL,
 105 };
 106 static struct clk tc0_clk = {
 107         .name           = "tc0_clk",
 108         .pmc_mask       = 1 << AT91SAM9RL_ID_TC0,
 109         .type           = CLK_TYPE_PERIPHERAL,
 110 };
 111 static struct clk tc1_clk = {
 112         .name           = "tc1_clk",
 113         .pmc_mask       = 1 << AT91SAM9RL_ID_TC1,
 114         .type           = CLK_TYPE_PERIPHERAL,
 115 };
 116 static struct clk tc2_clk = {
 117         .name           = "tc2_clk",
 118         .pmc_mask       = 1 << AT91SAM9RL_ID_TC2,
 119         .type           = CLK_TYPE_PERIPHERAL,
 120 };
 121 static struct clk pwm_clk = {
 122         .name           = "pwm_clk",
 123         .pmc_mask       = 1 << AT91SAM9RL_ID_PWMC,
 124         .type           = CLK_TYPE_PERIPHERAL,
 125 };
 126 static struct clk tsc_clk = {
 127         .name           = "tsc_clk",
 128         .pmc_mask       = 1 << AT91SAM9RL_ID_TSC,
 129         .type           = CLK_TYPE_PERIPHERAL,
 130 };
 131 static struct clk dma_clk = {
 132         .name           = "dma_clk",
 133         .pmc_mask       = 1 << AT91SAM9RL_ID_DMA,
 134         .type           = CLK_TYPE_PERIPHERAL,
 135 };
 136 static struct clk udphs_clk = {
 137         .name           = "udphs_clk",
 138         .pmc_mask       = 1 << AT91SAM9RL_ID_UDPHS,
 139         .type           = CLK_TYPE_PERIPHERAL,
 140 };
 141 static struct clk lcdc_clk = {
 142         .name           = "lcdc_clk",
 143         .pmc_mask       = 1 << AT91SAM9RL_ID_LCDC,
 144         .type           = CLK_TYPE_PERIPHERAL,
 145 };
 146 static struct clk ac97_clk = {
 147         .name           = "ac97_clk",
 148         .pmc_mask       = 1 << AT91SAM9RL_ID_AC97C,
 149         .type           = CLK_TYPE_PERIPHERAL,
 150 };
 151
 152 static struct clk *periph_clocks[] __initdata = {
 153         &pioA_clk,
 154         &pioB_clk,
 155         &pioC_clk,
 156         &pioD_clk,
 157         &usart0_clk,
 158         &usart1_clk,
 159         &usart2_clk,
 160         &usart3_clk,
 161         &mmc_clk,
 162         &twi0_clk,
 163         &twi1_clk,
 164         &spi_clk,
 165         &ssc0_clk,
 166         &ssc1_clk,
 167         &tc0_clk,
 168         &tc1_clk,
 169         &tc2_clk,
 170         &pwm_clk,
 171         &tsc_clk,
 172         &dma_clk,
 173         &udphs_clk,
 174         &lcdc_clk,
 175         &ac97_clk,
 176         // irq0
 177 };
 178
 179 static struct clk_lookup periph_clocks_lookups[] = {
 180         CLKDEV_CON_DEV_ID("hclk", "atmel_usba_udc", &utmi_clk),
 181         CLKDEV_CON_DEV_ID("pclk", "atmel_usba_udc", &udphs_clk),
 182         CLKDEV_CON_DEV_ID("t0_clk", "atmel_tcb.0", &tc0_clk),
 183         CLKDEV_CON_DEV_ID("t1_clk", "atmel_tcb.0", &tc1_clk),
 184         CLKDEV_CON_DEV_ID("t2_clk", "atmel_tcb.0", &tc2_clk),
 185         CLKDEV_CON_DEV_ID("pclk", "ssc.0", &ssc0_clk),
 186         CLKDEV_CON_DEV_ID("pclk", "ssc.1", &ssc1_clk),
 187 };
 188
 189 static struct clk_lookup usart_clocks_lookups[] = {
 190         CLKDEV_CON_DEV_ID("usart", "atmel_usart.0", &mck),
 191         CLKDEV_CON_DEV_ID("usart", "atmel_usart.1", &usart0_clk),
 192         CLKDEV_CON_DEV_ID("usart", "atmel_usart.2", &usart1_clk),
 193         CLKDEV_CON_DEV_ID("usart", "atmel_usart.3", &usart2_clk),
 194         CLKDEV_CON_DEV_ID("usart", "atmel_usart.4", &usart3_clk),
 195 };
 196
 197 /*
 198  * The two programmable clocks.
 199  * You must configure pin multiplexing to bring these signals out.
 200  */
 201 static struct clk pck0 = {
 202         .name           = "pck0",
 203         .pmc_mask       = AT91_PMC_PCK0,
 204         .type           = CLK_TYPE_PROGRAMMABLE,
 205         .id             = 0,
 206 };
 207 static struct clk pck1 = {
 208         .name           = "pck1",
 209         .pmc_mask       = AT91_PMC_PCK1,
 210         .type           = CLK_TYPE_PROGRAMMABLE,
 211         .id             = 1,
 212 };
 213
 214 static void __init at91sam9rl_register_clocks(void)
 215 {
 216         int i;
 217
 218         for (i = 0; i < ARRAY_SIZE(periph_clocks); i++)
 219                 clk_register(periph_clocks[i]);
 220
 221         clkdev_add_table(periph_clocks_lookups,
 222                          ARRAY_SIZE(periph_clocks_lookups));
 223         clkdev_add_table(usart_clocks_lookups,
 224                          ARRAY_SIZE(usart_clocks_lookups));
 225
 226         clk_register(&pck0);
 227         clk_register(&pck1);
 228 }
 229
 230 static struct clk_lookup console_clock_lookup;
 231
 232 void __init at91sam9rl_set_console_clock(int id)
 233 {
 234         if (id >= ARRAY_SIZE(usart_clocks_lookups))
 235                 return;
 236
 237         console_clock_lookup.con_id = "usart";
 238         console_clock_lookup.clk = usart_clocks_lookups[id].clk;
 239         clkdev_add(&console_clock_lookup);
 240 }
 241
 242 /* --------------------------------------------------------------------
 243  *  GPIO
 244  * -------------------------------------------------------------------- */
 245
 246 static struct at91_gpio_bank at91sam9rl_gpio[] = {
 247         {
 248                 .id             = AT91SAM9RL_ID_PIOA,
 249                 .offset         = AT91_PIOA,
 250                 .clock          = &pioA_clk,
 251         }, {
 252                 .id             = AT91SAM9RL_ID_PIOB,
 253                 .offset         = AT91_PIOB,
 254                 .clock          = &pioB_clk,
 255         }, {
 256                 .id             = AT91SAM9RL_ID_PIOC,
 257                 .offset         = AT91_PIOC,
 258                 .clock          = &pioC_clk,
 259         }, {
 260                 .id             = AT91SAM9RL_ID_PIOD,
 261                 .offset         = AT91_PIOD,
 262                 .clock          = &pioD_clk,
 263         }
 264 };
 265
 266 static void at91sam9rl_poweroff(void)
 267 {
 268         at91_sys_write(AT91_SHDW_CR, AT91_SHDW_KEY | AT91_SHDW_SHDW);
 269 }
 270
 271
 272 /* --------------------------------------------------------------------
 273  *  AT91SAM9RL processor initialization
 274  * -------------------------------------------------------------------- */
 275
 276 static void __init at91sam9rl_map_io(void)
 277 {
 278         unsigned long sram_size;
 279
 280         switch (at91_soc_initdata.cidr & AT91_CIDR_SRAMSIZ) {
 281                 case AT91_CIDR_SRAMSIZ_32K:
 282                         sram_size = 2 * SZ_16K;
 283                         break;
 284                 case AT91_CIDR_SRAMSIZ_16K:
 285                 default:
 286                         sram_size = SZ_16K;
 287         }
 288
 289         /* Map SRAM */
 290         at91_init_sram(0, AT91SAM9RL_SRAM_BASE, sram_size);
 291 }
 292
 293 static void __init at91sam9rl_initialize(void)
 294 {
 295         at91_arch_reset = at91sam9_alt_reset;
 296         pm_power_off = at91sam9rl_poweroff;
 297         at91_extern_irq = (1 << AT91SAM9RL_ID_IRQ0);
 298
 299         /* Register GPIO subsystem */
 300         at91_gpio_init(at91sam9rl_gpio, 4);
 301 }
 302
 303 /* --------------------------------------------------------------------
 304  *  Interrupt initialization
 305  * -------------------------------------------------------------------- */
 306
 307 /*
 308  * The default interrupt priority levels (0 = lowest, 7 = highest).
 309  */
 310 static unsigned int at91sam9rl_default_irq_priority[NR_AIC_IRQS] __initdata = {
 311         7,      /* Advanced Interrupt Controller */
 312         7,      /* System Peripherals */
 313         1,      /* Parallel IO Controller A */
 314         1,      /* Parallel IO Controller B */
 315         1,      /* Parallel IO Controller C */
 316         1,      /* Parallel IO Controller D */
 317         5,      /* USART 0 */
 318         5,      /* USART 1 */
 319         5,      /* USART 2 */
 320         5,      /* USART 3 */
 321         0,      /* Multimedia Card Interface */
 322         6,      /* Two-Wire Interface 0 */
 323         6,      /* Two-Wire Interface 1 */
 324         5,      /* Serial Peripheral Interface */
 325         4,      /* Serial Synchronous Controller 0 */
 326         4,      /* Serial Synchronous Controller 1 */
 327         0,      /* Timer Counter 0 */
 328         0,      /* Timer Counter 1 */
 329         0,      /* Timer Counter 2 */
 330         0,
 331         0,      /* Touch Screen Controller */
 332         0,      /* DMA Controller */
 333         2,      /* USB Device High speed port */
 334         2,      /* LCD Controller */
 335         6,      /* AC97 Controller */
 336         0,
 337         0,
 338         0,
 339         0,
 340         0,
 341         0,
 342         0,      /* Advanced Interrupt Controller */
 343 };
 344
 345 struct at91_init_soc __initdata at91sam9rl_soc = {
 346         .map_io = at91sam9rl_map_io,
 347         .default_irq_priority = at91sam9rl_default_irq_priority,
 348         .register_clocks = at91sam9rl_register_clocks,
 349         .init = at91sam9rl_initialize,
 350 };