release/src-rt-6.x.4708/linux/linux-2.6.36/arch/arm/mach-at91/at572d940hf.c

   1 /*
   2  * arch/arm/mach-at91/at572d940hf.c
   3  *
   4  * Antonio R. Costa <costa.antonior@gmail.com>
   5  * Copyright (C) 2008 Atmel
   6  *
   7  * Copyright (C) 2005 SAN People
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  22  *
  23  */
  24
  25 #include <linux/module.h>
  26
  27 #include <asm/mach/irq.h>
  28 #include <asm/mach/arch.h>
  29 #include <asm/mach/map.h>
  30 #include <mach/at572d940hf.h>
  31 #include <mach/at91_pmc.h>
  32 #include <mach/at91_rstc.h>
  33
  34 #include "generic.h"
  35 #include "clock.h"
  36
  37 static struct map_desc at572d940hf_io_desc[] __initdata = {
  38         {
  39                 .virtual        = AT91_VA_BASE_SYS,
  40                 .pfn            = __phys_to_pfn(AT91_BASE_SYS),
  41                 .length         = SZ_16K,
  42                 .type           = MT_DEVICE,
  43         }, {
  44                 .virtual        = AT91_IO_VIRT_BASE - AT572D940HF_SRAM_SIZE,
  45                 .pfn            = __phys_to_pfn(AT572D940HF_SRAM_BASE),
  46                 .length         = AT572D940HF_SRAM_SIZE,
  47                 .type           = MT_DEVICE,
  48         },
  49 };
  50
  51 /* --------------------------------------------------------------------
  52  *  Clocks
  53  * -------------------------------------------------------------------- */
  54
  55 /*
  56  * The peripheral clocks.
  57  */
  58 static struct clk pioA_clk = {
  59         .name           = "pioA_clk",
  60         .pmc_mask       = 1 << AT572D940HF_ID_PIOA,
  61         .type           = CLK_TYPE_PERIPHERAL,
  62 };
  63 static struct clk pioB_clk = {
  64         .name           = "pioB_clk",
  65         .pmc_mask       = 1 << AT572D940HF_ID_PIOB,
  66         .type           = CLK_TYPE_PERIPHERAL,
  67 };
  68 static struct clk pioC_clk = {
  69         .name           = "pioC_clk",
  70         .pmc_mask       = 1 << AT572D940HF_ID_PIOC,
  71         .type           = CLK_TYPE_PERIPHERAL,
  72 };
  73 static struct clk macb_clk = {
  74         .name           = "macb_clk",
  75         .pmc_mask       = 1 << AT572D940HF_ID_EMAC,
  76         .type           = CLK_TYPE_PERIPHERAL,
  77 };
  78 static struct clk usart0_clk = {
  79         .name           = "usart0_clk",
  80         .pmc_mask       = 1 << AT572D940HF_ID_US0,
  81         .type           = CLK_TYPE_PERIPHERAL,
  82 };
  83 static struct clk usart1_clk = {
  84         .name           = "usart1_clk",
  85         .pmc_mask       = 1 << AT572D940HF_ID_US1,
  86         .type           = CLK_TYPE_PERIPHERAL,
  87 };
  88 static struct clk usart2_clk = {
  89         .name           = "usart2_clk",
  90         .pmc_mask       = 1 << AT572D940HF_ID_US2,
  91         .type           = CLK_TYPE_PERIPHERAL,
  92 };
  93 static struct clk mmc_clk = {
  94         .name           = "mci_clk",
  95         .pmc_mask       = 1 << AT572D940HF_ID_MCI,
  96         .type           = CLK_TYPE_PERIPHERAL,
  97 };
  98 static struct clk udc_clk = {
  99         .name           = "udc_clk",
 100         .pmc_mask       = 1 << AT572D940HF_ID_UDP,
 101         .type           = CLK_TYPE_PERIPHERAL,
 102 };
 103 static struct clk twi0_clk = {
 104         .name           = "twi0_clk",
 105         .pmc_mask       = 1 << AT572D940HF_ID_TWI0,
 106         .type           = CLK_TYPE_PERIPHERAL,
 107 };
 108 static struct clk spi0_clk = {
 109         .name           = "spi0_clk",
 110         .pmc_mask       = 1 << AT572D940HF_ID_SPI0,
 111         .type           = CLK_TYPE_PERIPHERAL,
 112 };
 113 static struct clk spi1_clk = {
 114         .name           = "spi1_clk",
 115         .pmc_mask       = 1 << AT572D940HF_ID_SPI1,
 116         .type           = CLK_TYPE_PERIPHERAL,
 117 };
 118 static struct clk ssc0_clk = {
 119         .name           = "ssc0_clk",
 120         .pmc_mask       = 1 << AT572D940HF_ID_SSC0,
 121         .type           = CLK_TYPE_PERIPHERAL,
 122 };
 123 static struct clk ssc1_clk = {
 124         .name           = "ssc1_clk",
 125         .pmc_mask       = 1 << AT572D940HF_ID_SSC1,
 126         .type           = CLK_TYPE_PERIPHERAL,
 127 };
 128 static struct clk ssc2_clk = {
 129         .name           = "ssc2_clk",
 130         .pmc_mask       = 1 << AT572D940HF_ID_SSC2,
 131         .type           = CLK_TYPE_PERIPHERAL,
 132 };
 133 static struct clk tc0_clk = {
 134         .name           = "tc0_clk",
 135         .pmc_mask       = 1 << AT572D940HF_ID_TC0,
 136         .type           = CLK_TYPE_PERIPHERAL,
 137 };
 138 static struct clk tc1_clk = {
 139         .name           = "tc1_clk",
 140         .pmc_mask       = 1 << AT572D940HF_ID_TC1,
 141         .type           = CLK_TYPE_PERIPHERAL,
 142 };
 143 static struct clk tc2_clk = {
 144         .name           = "tc2_clk",
 145         .pmc_mask       = 1 << AT572D940HF_ID_TC2,
 146         .type           = CLK_TYPE_PERIPHERAL,
 147 };
 148 static struct clk ohci_clk = {
 149         .name           = "ohci_clk",
 150         .pmc_mask       = 1 << AT572D940HF_ID_UHP,
 151         .type           = CLK_TYPE_PERIPHERAL,
 152 };
 153 static struct clk ssc3_clk = {
 154         .name           = "ssc3_clk",
 155         .pmc_mask       = 1 << AT572D940HF_ID_SSC3,
 156         .type           = CLK_TYPE_PERIPHERAL,
 157 };
 158 static struct clk twi1_clk = {
 159         .name           = "twi1_clk",
 160         .pmc_mask       = 1 << AT572D940HF_ID_TWI1,
 161         .type           = CLK_TYPE_PERIPHERAL,
 162 };
 163 static struct clk can0_clk = {
 164         .name           = "can0_clk",
 165         .pmc_mask       = 1 << AT572D940HF_ID_CAN0,
 166         .type           = CLK_TYPE_PERIPHERAL,
 167 };
 168 static struct clk can1_clk = {
 169         .name           = "can1_clk",
 170         .pmc_mask       = 1 << AT572D940HF_ID_CAN1,
 171         .type           = CLK_TYPE_PERIPHERAL,
 172 };
 173 static struct clk mAgicV_clk = {
 174         .name           = "mAgicV_clk",
 175         .pmc_mask       = 1 << AT572D940HF_ID_MSIRQ0,
 176         .type           = CLK_TYPE_PERIPHERAL,
 177 };
 178
 179
 180 static struct clk *periph_clocks[] __initdata = {
 181         &pioA_clk,
 182         &pioB_clk,
 183         &pioC_clk,
 184         &macb_clk,
 185         &usart0_clk,
 186         &usart1_clk,
 187         &usart2_clk,
 188         &mmc_clk,
 189         &udc_clk,
 190         &twi0_clk,
 191         &spi0_clk,
 192         &spi1_clk,
 193         &ssc0_clk,
 194         &ssc1_clk,
 195         &ssc2_clk,
 196         &tc0_clk,
 197         &tc1_clk,
 198         &tc2_clk,
 199         &ohci_clk,
 200         &ssc3_clk,
 201         &twi1_clk,
 202         &can0_clk,
 203         &can1_clk,
 204         &mAgicV_clk,
 205         /* irq0 .. irq2 */
 206 };
 207
 208 /*
 209  * The five programmable clocks.
 210  * You must configure pin multiplexing to bring these signals out.
 211  */
 212 static struct clk pck0 = {
 213         .name           = "pck0",
 214         .pmc_mask       = AT91_PMC_PCK0,
 215         .type           = CLK_TYPE_PROGRAMMABLE,
 216         .id             = 0,
 217 };
 218 static struct clk pck1 = {
 219         .name           = "pck1",
 220         .pmc_mask       = AT91_PMC_PCK1,
 221         .type           = CLK_TYPE_PROGRAMMABLE,
 222         .id             = 1,
 223 };
 224 static struct clk pck2 = {
 225         .name           = "pck2",
 226         .pmc_mask       = AT91_PMC_PCK2,
 227         .type           = CLK_TYPE_PROGRAMMABLE,
 228         .id             = 2,
 229 };
 230 static struct clk pck3 = {
 231         .name           = "pck3",
 232         .pmc_mask       = AT91_PMC_PCK3,
 233         .type           = CLK_TYPE_PROGRAMMABLE,
 234         .id             = 3,
 235 };
 236
 237 static struct clk mAgicV_mem_clk = {
 238         .name           = "mAgicV_mem_clk",
 239         .pmc_mask       = AT91_PMC_PCK4,
 240         .type           = CLK_TYPE_PROGRAMMABLE,
 241         .id             = 4,
 242 };
 243
 244 /* HClocks */
 245 static struct clk hck0 = {
 246         .name           = "hck0",
 247         .pmc_mask       = AT91_PMC_HCK0,
 248         .type           = CLK_TYPE_SYSTEM,
 249         .id             = 0,
 250 };
 251 static struct clk hck1 = {
 252         .name           = "hck1",
 253         .pmc_mask       = AT91_PMC_HCK1,
 254         .type           = CLK_TYPE_SYSTEM,
 255         .id             = 1,
 256 };
 257
 258 static void __init at572d940hf_register_clocks(void)
 259 {
 260         int i;
 261
 262         for (i = 0; i < ARRAY_SIZE(periph_clocks); i++)
 263                 clk_register(periph_clocks[i]);
 264
 265         clk_register(&pck0);
 266         clk_register(&pck1);
 267         clk_register(&pck2);
 268         clk_register(&pck3);
 269         clk_register(&mAgicV_mem_clk);
 270
 271         clk_register(&hck0);
 272         clk_register(&hck1);
 273 }
 274
 275 /* --------------------------------------------------------------------
 276  *  GPIO
 277  * -------------------------------------------------------------------- */
 278
 279 static struct at91_gpio_bank at572d940hf_gpio[] = {
 280         {
 281                 .id             = AT572D940HF_ID_PIOA,
 282                 .offset         = AT91_PIOA,
 283                 .clock          = &pioA_clk,
 284         }, {
 285                 .id             = AT572D940HF_ID_PIOB,
 286                 .offset         = AT91_PIOB,
 287                 .clock          = &pioB_clk,
 288         }, {
 289                 .id             = AT572D940HF_ID_PIOC,
 290                 .offset         = AT91_PIOC,
 291                 .clock          = &pioC_clk,
 292         }
 293 };
 294
 295 static void at572d940hf_reset(void)
 296 {
 297         at91_sys_write(AT91_RSTC_CR, AT91_RSTC_KEY | AT91_RSTC_PROCRST | AT91_RSTC_PERRST);
 298 }
 299
 300
 301 /* --------------------------------------------------------------------
 302  *  AT572D940HF processor initialization
 303  * -------------------------------------------------------------------- */
 304
 305 void __init at572d940hf_initialize(unsigned long main_clock)
 306 {
 307         /* Map peripherals */
 308         iotable_init(at572d940hf_io_desc, ARRAY_SIZE(at572d940hf_io_desc));
 309
 310         at91_arch_reset = at572d940hf_reset;
 311         at91_extern_irq = (1 << AT572D940HF_ID_IRQ0) | (1 << AT572D940HF_ID_IRQ1)
 312                         | (1 << AT572D940HF_ID_IRQ2);
 313
 314         /* Init clock subsystem */
 315         at91_clock_init(main_clock);
 316
 317         /* Register the processor-specific clocks */
 318         at572d940hf_register_clocks();
 319
 320         /* Register GPIO subsystem */
 321         at91_gpio_init(at572d940hf_gpio, 3);
 322 }
 323
 324 /* --------------------------------------------------------------------
 325  *  Interrupt initialization
 326  * -------------------------------------------------------------------- */
 327
 328 /*
 329  * The default interrupt priority levels (0 = lowest, 7 = highest).
 330  */
 331 static unsigned int at572d940hf_default_irq_priority[NR_AIC_IRQS] __initdata = {
 332         7,      /* Advanced Interrupt Controller */
 333         7,      /* System Peripherals */
 334         0,      /* Parallel IO Controller A */
 335         0,      /* Parallel IO Controller B */
 336         0,      /* Parallel IO Controller C */
 337         3,      /* Ethernet */
 338         6,      /* USART 0 */
 339         6,      /* USART 1 */
 340         6,      /* USART 2 */
 341         0,      /* Multimedia Card Interface */
 342         4,      /* USB Device Port */
 343         0,      /* Two-Wire Interface 0 */
 344         6,      /* Serial Peripheral Interface 0 */
 345         6,      /* Serial Peripheral Interface 1 */
 346         5,      /* Serial Synchronous Controller 0 */
 347         5,      /* Serial Synchronous Controller 1 */
 348         5,      /* Serial Synchronous Controller 2 */
 349         0,      /* Timer Counter 0 */
 350         0,      /* Timer Counter 1 */
 351         0,      /* Timer Counter 2 */
 352         3,      /* USB Host port */
 353         3,      /* Serial Synchronous Controller 3 */
 354         0,      /* Two-Wire Interface 1 */
 355         0,      /* CAN Controller 0 */
 356         0,      /* CAN Controller 1 */
 357         0,      /* mAgicV HALT line */
 358         0,      /* mAgicV SIRQ0 line */
 359         0,      /* mAgicV exception line */
 360         0,      /* mAgicV end of DMA line */
 361         0,      /* Advanced Interrupt Controller */
 362         0,      /* Advanced Interrupt Controller */
 363         0,      /* Advanced Interrupt Controller */
 364 };
 365
 366 void __init at572d940hf_init_interrupts(unsigned int priority[NR_AIC_IRQS])
 367 {
 368         if (!priority)
 369                 priority = at572d940hf_default_irq_priority;
 370
 371         /* Initialize the AIC interrupt controller */
 372         at91_aic_init(priority);
 373
 374         /* Enable GPIO interrupts */
 375         at91_gpio_irq_setup();
 376 }