arch/arm/mach-s5p64x0/common.c

   1 /*
   2  * Copyright (c) 2009-2011 Samsung Electronics Co., Ltd.
   3  *              http://www.samsung.com
   4  *
   5  * Common Codes for S5P64X0 machines
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  */
  11
  12 #include <linux/kernel.h>
  13 #include <linux/types.h>
  14 #include <linux/interrupt.h>
  15 #include <linux/list.h>
  16 #include <linux/timer.h>
  17 #include <linux/init.h>
  18 #include <linux/clk.h>
  19 #include <linux/io.h>
  20 #include <linux/device.h>
  21 #include <linux/serial_core.h>
  22 #include <linux/platform_device.h>
  23 #include <linux/sched.h>
  24 #include <linux/dma-mapping.h>
  25 #include <linux/gpio.h>
  26 #include <linux/irq.h>
  27 #include <linux/reboot.h>
  28
  29 #include <asm/irq.h>
  30 #include <asm/proc-fns.h>
  31 #include <asm/system_misc.h>
  32 #include <asm/mach/arch.h>
  33 #include <asm/mach/map.h>
  34 #include <asm/mach/irq.h>
  35
  36 #include <mach/map.h>
  37 #include <mach/hardware.h>
  38 #include <mach/regs-clock.h>
  39 #include <mach/regs-gpio.h>
  40
  41 #include <plat/cpu.h>
  42 #include <plat/clock.h>
  43 #include <plat/devs.h>
  44 #include <plat/pm.h>
  45 #include <plat/sdhci.h>
  46 #include <plat/adc-core.h>
  47 #include <plat/fb-core.h>
  48 #include <plat/spi-core.h>
  49 #include <plat/gpio-cfg.h>
  50 #include <plat/regs-irqtype.h>
  51 #include <plat/regs-serial.h>
  52 #include <plat/watchdog-reset.h>
  53
  54 #include "common.h"
  55
  56 static const char name_s5p6440[] = "S5P6440";
  57 static const char name_s5p6450[] = "S5P6450";
  58
  59 static struct cpu_table cpu_ids[] __initdata = {
  60         {
  61                 .idcode         = S5P6440_CPU_ID,
  62                 .idmask         = S5P64XX_CPU_MASK,
  63                 .map_io         = s5p6440_map_io,
  64                 .init_clocks    = s5p6440_init_clocks,
  65                 .init_uarts     = s5p6440_init_uarts,
  66                 .init           = s5p64x0_init,
  67                 .name           = name_s5p6440,
  68         }, {
  69                 .idcode         = S5P6450_CPU_ID,
  70                 .idmask         = S5P64XX_CPU_MASK,
  71                 .map_io         = s5p6450_map_io,
  72                 .init_clocks    = s5p6450_init_clocks,
  73                 .init_uarts     = s5p6450_init_uarts,
  74                 .init           = s5p64x0_init,
  75                 .name           = name_s5p6450,
  76         },
  77 };
  78
  79 /* Initial IO mappings */
  80
  81 static struct map_desc s5p64x0_iodesc[] __initdata = {
  82         {
  83                 .virtual        = (unsigned long)S5P_VA_CHIPID,
  84                 .pfn            = __phys_to_pfn(S5P64X0_PA_CHIPID),
  85                 .length         = SZ_4K,
  86                 .type           = MT_DEVICE,
  87         }, {
  88                 .virtual        = (unsigned long)S3C_VA_SYS,
  89                 .pfn            = __phys_to_pfn(S5P64X0_PA_SYSCON),
  90                 .length         = SZ_64K,
  91                 .type           = MT_DEVICE,
  92         }, {
  93                 .virtual        = (unsigned long)S3C_VA_TIMER,
  94                 .pfn            = __phys_to_pfn(S5P64X0_PA_TIMER),
  95                 .length         = SZ_16K,
  96                 .type           = MT_DEVICE,
  97         }, {
  98                 .virtual        = (unsigned long)S3C_VA_WATCHDOG,
  99                 .pfn            = __phys_to_pfn(S5P64X0_PA_WDT),
 100                 .length         = SZ_4K,
 101                 .type           = MT_DEVICE,
 102         }, {
 103                 .virtual        = (unsigned long)S5P_VA_SROMC,
 104                 .pfn            = __phys_to_pfn(S5P64X0_PA_SROMC),
 105                 .length         = SZ_4K,
 106                 .type           = MT_DEVICE,
 107         }, {
 108                 .virtual        = (unsigned long)S5P_VA_GPIO,
 109                 .pfn            = __phys_to_pfn(S5P64X0_PA_GPIO),
 110                 .length         = SZ_4K,
 111                 .type           = MT_DEVICE,
 112         }, {
 113                 .virtual        = (unsigned long)VA_VIC0,
 114                 .pfn            = __phys_to_pfn(S5P64X0_PA_VIC0),
 115                 .length         = SZ_16K,
 116                 .type           = MT_DEVICE,
 117         }, {
 118                 .virtual        = (unsigned long)VA_VIC1,
 119                 .pfn            = __phys_to_pfn(S5P64X0_PA_VIC1),
 120                 .length         = SZ_16K,
 121                 .type           = MT_DEVICE,
 122         },
 123 };
 124
 125 static struct map_desc s5p6440_iodesc[] __initdata = {
 126         {
 127                 .virtual        = (unsigned long)S3C_VA_UART,
 128                 .pfn            = __phys_to_pfn(S5P6440_PA_UART(0)),
 129                 .length         = SZ_4K,
 130                 .type           = MT_DEVICE,
 131         },
 132 };
 133
 134 static struct map_desc s5p6450_iodesc[] __initdata = {
 135         {
 136                 .virtual        = (unsigned long)S3C_VA_UART,
 137                 .pfn            = __phys_to_pfn(S5P6450_PA_UART(0)),
 138                 .length         = SZ_512K,
 139                 .type           = MT_DEVICE,
 140         }, {
 141                 .virtual        = (unsigned long)S3C_VA_UART + SZ_512K,
 142                 .pfn            = __phys_to_pfn(S5P6450_PA_UART(5)),
 143                 .length         = SZ_4K,
 144                 .type           = MT_DEVICE,
 145         },
 146 };
 147
 148 static void s5p64x0_idle(void)
 149 {
 150         unsigned long val;
 151
 152         val = __raw_readl(S5P64X0_PWR_CFG);
 153         val &= ~(0x3 << 5);
 154         val |= (0x1 << 5);
 155         __raw_writel(val, S5P64X0_PWR_CFG);
 156
 157         cpu_do_idle();
 158 }
 159
 160 /*
 161  * s5p64x0_map_io
 162  *
 163  * register the standard CPU IO areas
 164  */
 165
 166 void __init s5p64x0_init_io(struct map_desc *mach_desc, int size)
 167 {
 168         /* initialize the io descriptors we need for initialization */
 169         iotable_init(s5p64x0_iodesc, ARRAY_SIZE(s5p64x0_iodesc));
 170         if (mach_desc)
 171                 iotable_init(mach_desc, size);
 172
 173         /* detect cpu id and rev. */
 174         s5p_init_cpu(S5P64X0_SYS_ID);
 175
 176         s3c_init_cpu(samsung_cpu_id, cpu_ids, ARRAY_SIZE(cpu_ids));
 177         samsung_wdt_reset_init(S3C_VA_WATCHDOG);
 178
 179 }
 180
 181 void __init s5p6440_map_io(void)
 182 {
 183         /* initialize any device information early */
 184         s3c_adc_setname("s3c64xx-adc");
 185         s3c_fb_setname("s5p64x0-fb");
 186         s3c64xx_spi_setname("s5p64x0-spi");
 187
 188         s5p64x0_default_sdhci0();
 189         s5p64x0_default_sdhci1();
 190         s5p6440_default_sdhci2();
 191
 192         iotable_init(s5p6440_iodesc, ARRAY_SIZE(s5p6440_iodesc));
 193 }
 194
 195 void __init s5p6450_map_io(void)
 196 {
 197         /* initialize any device information early */
 198         s3c_adc_setname("s3c64xx-adc");
 199         s3c_fb_setname("s5p64x0-fb");
 200         s3c64xx_spi_setname("s5p64x0-spi");
 201
 202         s5p64x0_default_sdhci0();
 203         s5p64x0_default_sdhci1();
 204         s5p6450_default_sdhci2();
 205
 206         iotable_init(s5p6450_iodesc, ARRAY_SIZE(s5p6450_iodesc));
 207 }
 208
 209 /*
 210  * s5p64x0_init_clocks
 211  *
 212  * register and setup the CPU clocks
 213  */
 214
 215 void __init s5p6440_init_clocks(int xtal)
 216 {
 217         printk(KERN_DEBUG "%s: initializing clocks\n", __func__);
 218
 219         s3c24xx_register_baseclocks(xtal);
 220         s5p_register_clocks(xtal);
 221         s5p6440_register_clocks();
 222         s5p6440_setup_clocks();
 223 }
 224
 225 void __init s5p6450_init_clocks(int xtal)
 226 {
 227         printk(KERN_DEBUG "%s: initializing clocks\n", __func__);
 228
 229         s3c24xx_register_baseclocks(xtal);
 230         s5p_register_clocks(xtal);
 231         s5p6450_register_clocks();
 232         s5p6450_setup_clocks();
 233 }
 234
 235 /*
 236  * s5p64x0_init_irq
 237  *
 238  * register the CPU interrupts
 239  */
 240
 241 void __init s5p6440_init_irq(void)
 242 {
 243         /* S5P6440 supports 2 VIC */
 244         u32 vic[2];
 245
 246         /*
 247          * VIC0 is missing IRQ_VIC0[3, 4, 8, 10, (12-22)]
 248          * VIC1 is missing IRQ VIC1[1, 3, 4, 10, 11, 12, 14, 15, 22]
 249          */
 250         vic[0] = 0xff800ae7;
 251         vic[1] = 0xffbf23e5;
 252
 253         s5p_init_irq(vic, ARRAY_SIZE(vic));
 254 }
 255
 256 void __init s5p6450_init_irq(void)
 257 {
 258         /* S5P6450 supports only 2 VIC */
 259         u32 vic[2];
 260
 261         /*
 262          * VIC0 is missing IRQ_VIC0[(13-15), (21-22)]
 263          * VIC1 is missing IRQ VIC1[12, 14, 23]
 264          */
 265         vic[0] = 0xff9f1fff;
 266         vic[1] = 0xff7fafff;
 267
 268         s5p_init_irq(vic, ARRAY_SIZE(vic));
 269 }
 270
 271 struct bus_type s5p64x0_subsys = {
 272         .name           = "s5p64x0-core",
 273         .dev_name       = "s5p64x0-core",
 274 };
 275
 276 static struct device s5p64x0_dev = {
 277         .bus    = &s5p64x0_subsys,
 278 };
 279
 280 static int __init s5p64x0_core_init(void)
 281 {
 282         return subsys_system_register(&s5p64x0_subsys, NULL);
 283 }
 284 core_initcall(s5p64x0_core_init);
 285
 286 int __init s5p64x0_init(void)
 287 {
 288         printk(KERN_INFO "S5P64X0(S5P6440/S5P6450): Initializing architecture\n");
 289
 290         /* set idle function */
 291         arm_pm_idle = s5p64x0_idle;
 292
 293         return device_register(&s5p64x0_dev);
 294 }
 295
 296 /* uart registration process */
 297 void __init s5p6440_init_uarts(struct s3c2410_uartcfg *cfg, int no)
 298 {
 299         int uart;
 300
 301         for (uart = 0; uart < no; uart++) {
 302                 s5p_uart_resources[uart].resources->start = S5P6440_PA_UART(uart);
 303                 s5p_uart_resources[uart].resources->end = S5P6440_PA_UART(uart) + S5P_SZ_UART;
 304         }
 305
 306         s3c24xx_init_uartdevs("s3c6400-uart", s5p_uart_resources, cfg, no);
 307 }
 308
 309 void __init s5p6450_init_uarts(struct s3c2410_uartcfg *cfg, int no)
 310 {
 311         s3c24xx_init_uartdevs("s3c6400-uart", s5p_uart_resources, cfg, no);
 312 }
 313
 314 #define eint_offset(irq)        ((irq) - IRQ_EINT(0))
 315
 316 static int s5p64x0_irq_eint_set_type(struct irq_data *data, unsigned int type)
 317 {
 318         int offs = eint_offset(data->irq);
 319         int shift;
 320         u32 ctrl, mask;
 321         u32 newvalue = 0;
 322
 323         if (offs > 15)
 324                 return -EINVAL;
 325
 326         switch (type) {
 327         case IRQ_TYPE_NONE:
 328                 printk(KERN_WARNING "No edge setting!\n");
 329                 break;
 330         case IRQ_TYPE_EDGE_RISING:
 331                 newvalue = S3C2410_EXTINT_RISEEDGE;
 332                 break;
 333         case IRQ_TYPE_EDGE_FALLING:
 334                 newvalue = S3C2410_EXTINT_FALLEDGE;
 335                 break;
 336         case IRQ_TYPE_EDGE_BOTH:
 337                 newvalue = S3C2410_EXTINT_BOTHEDGE;
 338                 break;
 339         case IRQ_TYPE_LEVEL_LOW:
 340                 newvalue = S3C2410_EXTINT_LOWLEV;
 341                 break;
 342         case IRQ_TYPE_LEVEL_HIGH:
 343                 newvalue = S3C2410_EXTINT_HILEV;
 344                 break;
 345         default:
 346                 printk(KERN_ERR "No such irq type %d", type);
 347                 return -EINVAL;
 348         }
 349
 350         shift = (offs / 2) * 4;
 351         mask = 0x7 << shift;
 352
 353         ctrl = __raw_readl(S5P64X0_EINT0CON0) & ~mask;
 354         ctrl |= newvalue << shift;
 355         __raw_writel(ctrl, S5P64X0_EINT0CON0);
 356
 357         /* Configure the GPIO pin for 6450 or 6440 based on CPU ID */
 358         if (soc_is_s5p6450())
 359                 s3c_gpio_cfgpin(S5P6450_GPN(offs), S3C_GPIO_SFN(2));
 360         else
 361                 s3c_gpio_cfgpin(S5P6440_GPN(offs), S3C_GPIO_SFN(2));
 362
 363         return 0;
 364 }
 365
 366 /*
 367  * s5p64x0_irq_demux_eint
 368  *
 369  * This function demuxes the IRQ from the group0 external interrupts,
 370  * from IRQ_EINT(0) to IRQ_EINT(15). It is designed to be inlined into
 371  * the specific handlers s5p64x0_irq_demux_eintX_Y.
 372  */
 373 static inline void s5p64x0_irq_demux_eint(unsigned int start, unsigned int end)
 374 {
 375         u32 status = __raw_readl(S5P64X0_EINT0PEND);
 376         u32 mask = __raw_readl(S5P64X0_EINT0MASK);
 377         unsigned int irq;
 378
 379         status &= ~mask;
 380         status >>= start;
 381         status &= (1 << (end - start + 1)) - 1;
 382
 383         for (irq = IRQ_EINT(start); irq <= IRQ_EINT(end); irq++) {
 384                 if (status & 1)
 385                         generic_handle_irq(irq);
 386                 status >>= 1;
 387         }
 388 }
 389
 390 static void s5p64x0_irq_demux_eint0_3(unsigned int irq, struct irq_desc *desc)
 391 {
 392         s5p64x0_irq_demux_eint(0, 3);
 393 }
 394
 395 static void s5p64x0_irq_demux_eint4_11(unsigned int irq, struct irq_desc *desc)
 396 {
 397         s5p64x0_irq_demux_eint(4, 11);
 398 }
 399
 400 static void s5p64x0_irq_demux_eint12_15(unsigned int irq,
 401                                         struct irq_desc *desc)
 402 {
 403         s5p64x0_irq_demux_eint(12, 15);
 404 }
 405
 406 static int s5p64x0_alloc_gc(void)
 407 {
 408         struct irq_chip_generic *gc;
 409         struct irq_chip_type *ct;
 410
 411         gc = irq_alloc_generic_chip("s5p64x0-eint", 1, S5P_IRQ_EINT_BASE,
 412                                     S5P_VA_GPIO, handle_level_irq);
 413         if (!gc) {
 414                 printk(KERN_ERR "%s: irq_alloc_generic_chip for group 0"
 415                         "external interrupts failed\n", __func__);
 416                 return -EINVAL;
 417         }
 418
 419         ct = gc->chip_types;
 420         ct->chip.irq_ack = irq_gc_ack_set_bit;
 421         ct->chip.irq_mask = irq_gc_mask_set_bit;
 422         ct->chip.irq_unmask = irq_gc_mask_clr_bit;
 423         ct->chip.irq_set_type = s5p64x0_irq_eint_set_type;
 424         ct->chip.irq_set_wake = s3c_irqext_wake;
 425         ct->regs.ack = EINT0PEND_OFFSET;
 426         ct->regs.mask = EINT0MASK_OFFSET;
 427         irq_setup_generic_chip(gc, IRQ_MSK(16), IRQ_GC_INIT_MASK_CACHE,
 428                                IRQ_NOREQUEST | IRQ_NOPROBE, 0);
 429         return 0;
 430 }
 431
 432 static int __init s5p64x0_init_irq_eint(void)
 433 {
 434         int ret = s5p64x0_alloc_gc();
 435         irq_set_chained_handler(IRQ_EINT0_3, s5p64x0_irq_demux_eint0_3);
 436         irq_set_chained_handler(IRQ_EINT4_11, s5p64x0_irq_demux_eint4_11);
 437         irq_set_chained_handler(IRQ_EINT12_15, s5p64x0_irq_demux_eint12_15);
 438
 439         return ret;
 440 }
 441 arch_initcall(s5p64x0_init_irq_eint);
 442
 443 void s5p64x0_restart(enum reboot_mode mode, const char *cmd)
 444 {
 445         if (mode != REBOOT_SOFT)
 446                 samsung_wdt_reset();
 447
 448         soft_restart(0);
 449 }