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
  28 #include <asm/irq.h>
  29 #include <asm/proc-fns.h>
  30 #include <asm/mach/arch.h>
  31 #include <asm/mach/map.h>
  32 #include <asm/mach/irq.h>
  33
  34 #include <mach/map.h>
  35 #include <mach/hardware.h>
  36 #include <mach/regs-clock.h>
  37 #include <mach/regs-gpio.h>
  38
  39 #include <plat/cpu.h>
  40 #include <plat/clock.h>
  41 #include <plat/devs.h>
  42 #include <plat/pm.h>
  43 #include <plat/sdhci.h>
  44 #include <plat/adc-core.h>
  45 #include <plat/fb-core.h>
  46 #include <plat/gpio-cfg.h>
  47 #include <plat/regs-irqtype.h>
  48 #include <plat/regs-serial.h>
  49 #include <plat/watchdog-reset.h>
  50
  51 #include "common.h"
  52
  53 static const char name_s5p6440[] = "S5P6440";
  54 static const char name_s5p6450[] = "S5P6450";
  55
  56 static struct cpu_table cpu_ids[] __initdata = {
  57         {
  58                 .idcode         = S5P6440_CPU_ID,
  59                 .idmask         = S5P64XX_CPU_MASK,
  60                 .map_io         = s5p6440_map_io,
  61                 .init_clocks    = s5p6440_init_clocks,
  62                 .init_uarts     = s5p6440_init_uarts,
  63                 .init           = s5p64x0_init,
  64                 .name           = name_s5p6440,
  65         }, {
  66                 .idcode         = S5P6450_CPU_ID,
  67                 .idmask         = S5P64XX_CPU_MASK,
  68                 .map_io         = s5p6450_map_io,
  69                 .init_clocks    = s5p6450_init_clocks,
  70                 .init_uarts     = s5p6450_init_uarts,
  71                 .init           = s5p64x0_init,
  72                 .name           = name_s5p6450,
  73         },
  74 };
  75
  76 /* Initial IO mappings */
  77
  78 static struct map_desc s5p64x0_iodesc[] __initdata = {
  79         {
  80                 .virtual        = (unsigned long)S5P_VA_CHIPID,
  81                 .pfn            = __phys_to_pfn(S5P64X0_PA_CHIPID),
  82                 .length         = SZ_4K,
  83                 .type           = MT_DEVICE,
  84         }, {
  85                 .virtual        = (unsigned long)S3C_VA_SYS,
  86                 .pfn            = __phys_to_pfn(S5P64X0_PA_SYSCON),
  87                 .length         = SZ_64K,
  88                 .type           = MT_DEVICE,
  89         }, {
  90                 .virtual        = (unsigned long)S3C_VA_TIMER,
  91                 .pfn            = __phys_to_pfn(S5P64X0_PA_TIMER),
  92                 .length         = SZ_16K,
  93                 .type           = MT_DEVICE,
  94         }, {
  95                 .virtual        = (unsigned long)S3C_VA_WATCHDOG,
  96                 .pfn            = __phys_to_pfn(S5P64X0_PA_WDT),
  97                 .length         = SZ_4K,
  98                 .type           = MT_DEVICE,
  99         }, {
 100                 .virtual        = (unsigned long)S5P_VA_SROMC,
 101                 .pfn            = __phys_to_pfn(S5P64X0_PA_SROMC),
 102                 .length         = SZ_4K,
 103                 .type           = MT_DEVICE,
 104         }, {
 105                 .virtual        = (unsigned long)S5P_VA_GPIO,
 106                 .pfn            = __phys_to_pfn(S5P64X0_PA_GPIO),
 107                 .length         = SZ_4K,
 108                 .type           = MT_DEVICE,
 109         }, {
 110                 .virtual        = (unsigned long)VA_VIC0,
 111                 .pfn            = __phys_to_pfn(S5P64X0_PA_VIC0),
 112                 .length         = SZ_16K,
 113                 .type           = MT_DEVICE,
 114         }, {
 115                 .virtual        = (unsigned long)VA_VIC1,
 116                 .pfn            = __phys_to_pfn(S5P64X0_PA_VIC1),
 117                 .length         = SZ_16K,
 118                 .type           = MT_DEVICE,
 119         },
 120 };
 121
 122 static struct map_desc s5p6440_iodesc[] __initdata = {
 123         {
 124                 .virtual        = (unsigned long)S3C_VA_UART,
 125                 .pfn            = __phys_to_pfn(S5P6440_PA_UART(0)),
 126                 .length         = SZ_4K,
 127                 .type           = MT_DEVICE,
 128         },
 129 };
 130
 131 static struct map_desc s5p6450_iodesc[] __initdata = {
 132         {
 133                 .virtual        = (unsigned long)S3C_VA_UART,
 134                 .pfn            = __phys_to_pfn(S5P6450_PA_UART(0)),
 135                 .length         = SZ_512K,
 136                 .type           = MT_DEVICE,
 137         }, {
 138                 .virtual        = (unsigned long)S3C_VA_UART + SZ_512K,
 139                 .pfn            = __phys_to_pfn(S5P6450_PA_UART(5)),
 140                 .length         = SZ_4K,
 141                 .type           = MT_DEVICE,
 142         },
 143 };
 144
 145 static void s5p64x0_idle(void)
 146 {
 147         unsigned long val;
 148
 149         if (!need_resched()) {
 150                 val = __raw_readl(S5P64X0_PWR_CFG);
 151                 val &= ~(0x3 << 5);
 152                 val |= (0x1 << 5);
 153                 __raw_writel(val, S5P64X0_PWR_CFG);
 154
 155                 cpu_do_idle();
 156         }
 157         local_irq_enable();
 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 }
 178
 179 void __init s5p6440_map_io(void)
 180 {
 181         /* initialize any device information early */
 182         s3c_adc_setname("s3c64xx-adc");
 183         s3c_fb_setname("s5p64x0-fb");
 184
 185         s5p64x0_default_sdhci0();
 186         s5p64x0_default_sdhci1();
 187         s5p6440_default_sdhci2();
 188
 189         iotable_init(s5p6440_iodesc, ARRAY_SIZE(s5p6440_iodesc));
 190         init_consistent_dma_size(SZ_8M);
 191 }
 192
 193 void __init s5p6450_map_io(void)
 194 {
 195         /* initialize any device information early */
 196         s3c_adc_setname("s3c64xx-adc");
 197         s3c_fb_setname("s5p64x0-fb");
 198
 199         s5p64x0_default_sdhci0();
 200         s5p64x0_default_sdhci1();
 201         s5p6450_default_sdhci2();
 202
 203         iotable_init(s5p6450_iodesc, ARRAY_SIZE(s5p6450_iodesc));
 204         init_consistent_dma_size(SZ_8M);
 205 }
 206
 207 /*
 208  * s5p64x0_init_clocks
 209  *
 210  * register and setup the CPU clocks
 211  */
 212
 213 void __init s5p6440_init_clocks(int xtal)
 214 {
 215         printk(KERN_DEBUG "%s: initializing clocks\n", __func__);
 216
 217         s3c24xx_register_baseclocks(xtal);
 218         s5p_register_clocks(xtal);
 219         s5p6440_register_clocks();
 220         s5p6440_setup_clocks();
 221 }
 222
 223 void __init s5p6450_init_clocks(int xtal)
 224 {
 225         printk(KERN_DEBUG "%s: initializing clocks\n", __func__);
 226
 227         s3c24xx_register_baseclocks(xtal);
 228         s5p_register_clocks(xtal);
 229         s5p6450_register_clocks();
 230         s5p6450_setup_clocks();
 231 }
 232
 233 /*
 234  * s5p64x0_init_irq
 235  *
 236  * register the CPU interrupts
 237  */
 238
 239 void __init s5p6440_init_irq(void)
 240 {
 241         /* S5P6440 supports 2 VIC */
 242         u32 vic[2];
 243
 244         /*
 245          * VIC0 is missing IRQ_VIC0[3, 4, 8, 10, (12-22)]
 246          * VIC1 is missing IRQ VIC1[1, 3, 4, 10, 11, 12, 14, 15, 22]
 247          */
 248         vic[0] = 0xff800ae7;
 249         vic[1] = 0xffbf23e5;
 250
 251         s5p_init_irq(vic, ARRAY_SIZE(vic));
 252 }
 253
 254 void __init s5p6450_init_irq(void)
 255 {
 256         /* S5P6450 supports only 2 VIC */
 257         u32 vic[2];
 258
 259         /*
 260          * VIC0 is missing IRQ_VIC0[(13-15), (21-22)]
 261          * VIC1 is missing IRQ VIC1[12, 14, 23]
 262          */
 263         vic[0] = 0xff9f1fff;
 264         vic[1] = 0xff7fafff;
 265
 266         s5p_init_irq(vic, ARRAY_SIZE(vic));
 267 }
 268
 269 struct bus_type s5p64x0_subsys = {
 270         .name           = "s5p64x0-core",
 271         .dev_name       = "s5p64x0-core",
 272 };
 273
 274 static struct device s5p64x0_dev = {
 275         .bus    = &s5p64x0_subsys,
 276 };
 277
 278 static int __init s5p64x0_core_init(void)
 279 {
 280         return subsys_system_register(&s5p64x0_subsys, NULL);
 281 }
 282 core_initcall(s5p64x0_core_init);
 283
 284 int __init s5p64x0_init(void)
 285 {
 286         printk(KERN_INFO "S5P64X0(S5P6440/S5P6450): Initializing architecture\n");
 287
 288         /* set idle function */
 289         pm_idle = s5p64x0_idle;
 290
 291         return device_register(&s5p64x0_dev);
 292 }
 293
 294 /* uart registration process */
 295 void __init s5p6440_init_uarts(struct s3c2410_uartcfg *cfg, int no)
 296 {
 297         int uart;
 298
 299         for (uart = 0; uart < no; uart++) {
 300                 s5p_uart_resources[uart].resources->start = S5P6440_PA_UART(uart);
 301                 s5p_uart_resources[uart].resources->end = S5P6440_PA_UART(uart) + S5P_SZ_UART;
 302         }
 303
 304         s3c24xx_init_uartdevs("s3c6400-uart", s5p_uart_resources, cfg, no);
 305 }
 306
 307 void __init s5p6450_init_uarts(struct s3c2410_uartcfg *cfg, int no)
 308 {
 309         s3c24xx_init_uartdevs("s3c6400-uart", s5p_uart_resources, cfg, no);
 310 }
 311
 312 #define eint_offset(irq)        ((irq) - IRQ_EINT(0))
 313
 314 static int s5p64x0_irq_eint_set_type(struct irq_data *data, unsigned int type)
 315 {
 316         int offs = eint_offset(data->irq);
 317         int shift;
 318         u32 ctrl, mask;
 319         u32 newvalue = 0;
 320
 321         if (offs > 15)
 322                 return -EINVAL;
 323
 324         switch (type) {
 325         case IRQ_TYPE_NONE:
 326                 printk(KERN_WARNING "No edge setting!\n");
 327                 break;
 328         case IRQ_TYPE_EDGE_RISING:
 329                 newvalue = S3C2410_EXTINT_RISEEDGE;
 330                 break;
 331         case IRQ_TYPE_EDGE_FALLING:
 332                 newvalue = S3C2410_EXTINT_FALLEDGE;
 333                 break;
 334         case IRQ_TYPE_EDGE_BOTH:
 335                 newvalue = S3C2410_EXTINT_BOTHEDGE;
 336                 break;
 337         case IRQ_TYPE_LEVEL_LOW:
 338                 newvalue = S3C2410_EXTINT_LOWLEV;
 339                 break;
 340         case IRQ_TYPE_LEVEL_HIGH:
 341                 newvalue = S3C2410_EXTINT_HILEV;
 342                 break;
 343         default:
 344                 printk(KERN_ERR "No such irq type %d", type);
 345                 return -EINVAL;
 346         }
 347
 348         shift = (offs / 2) * 4;
 349         mask = 0x7 << shift;
 350
 351         ctrl = __raw_readl(S5P64X0_EINT0CON0) & ~mask;
 352         ctrl |= newvalue << shift;
 353         __raw_writel(ctrl, S5P64X0_EINT0CON0);
 354
 355         /* Configure the GPIO pin for 6450 or 6440 based on CPU ID */
 356         if (soc_is_s5p6450())
 357                 s3c_gpio_cfgpin(S5P6450_GPN(offs), S3C_GPIO_SFN(2));
 358         else
 359                 s3c_gpio_cfgpin(S5P6440_GPN(offs), S3C_GPIO_SFN(2));
 360
 361         return 0;
 362 }
 363
 364 /*
 365  * s5p64x0_irq_demux_eint
 366  *
 367  * This function demuxes the IRQ from the group0 external interrupts,
 368  * from IRQ_EINT(0) to IRQ_EINT(15). It is designed to be inlined into
 369  * the specific handlers s5p64x0_irq_demux_eintX_Y.
 370  */
 371 static inline void s5p64x0_irq_demux_eint(unsigned int start, unsigned int end)
 372 {
 373         u32 status = __raw_readl(S5P64X0_EINT0PEND);
 374         u32 mask = __raw_readl(S5P64X0_EINT0MASK);
 375         unsigned int irq;
 376
 377         status &= ~mask;
 378         status >>= start;
 379         status &= (1 << (end - start + 1)) - 1;
 380
 381         for (irq = IRQ_EINT(start); irq <= IRQ_EINT(end); irq++) {
 382                 if (status & 1)
 383                         generic_handle_irq(irq);
 384                 status >>= 1;
 385         }
 386 }
 387
 388 static void s5p64x0_irq_demux_eint0_3(unsigned int irq, struct irq_desc *desc)
 389 {
 390         s5p64x0_irq_demux_eint(0, 3);
 391 }
 392
 393 static void s5p64x0_irq_demux_eint4_11(unsigned int irq, struct irq_desc *desc)
 394 {
 395         s5p64x0_irq_demux_eint(4, 11);
 396 }
 397
 398 static void s5p64x0_irq_demux_eint12_15(unsigned int irq,
 399                                         struct irq_desc *desc)
 400 {
 401         s5p64x0_irq_demux_eint(12, 15);
 402 }
 403
 404 static int s5p64x0_alloc_gc(void)
 405 {
 406         struct irq_chip_generic *gc;
 407         struct irq_chip_type *ct;
 408
 409         gc = irq_alloc_generic_chip("s5p64x0-eint", 1, S5P_IRQ_EINT_BASE,
 410                                     S5P_VA_GPIO, handle_level_irq);
 411         if (!gc) {
 412                 printk(KERN_ERR "%s: irq_alloc_generic_chip for group 0"
 413                         "external interrupts failed\n", __func__);
 414                 return -EINVAL;
 415         }
 416
 417         ct = gc->chip_types;
 418         ct->chip.irq_ack = irq_gc_ack_set_bit;
 419         ct->chip.irq_mask = irq_gc_mask_set_bit;
 420         ct->chip.irq_unmask = irq_gc_mask_clr_bit;
 421         ct->chip.irq_set_type = s5p64x0_irq_eint_set_type;
 422         ct->chip.irq_set_wake = s3c_irqext_wake;
 423         ct->regs.ack = EINT0PEND_OFFSET;
 424         ct->regs.mask = EINT0MASK_OFFSET;
 425         irq_setup_generic_chip(gc, IRQ_MSK(16), IRQ_GC_INIT_MASK_CACHE,
 426                                IRQ_NOREQUEST | IRQ_NOPROBE, 0);
 427         return 0;
 428 }
 429
 430 static int __init s5p64x0_init_irq_eint(void)
 431 {
 432         int ret = s5p64x0_alloc_gc();
 433         irq_set_chained_handler(IRQ_EINT0_3, s5p64x0_irq_demux_eint0_3);
 434         irq_set_chained_handler(IRQ_EINT4_11, s5p64x0_irq_demux_eint4_11);
 435         irq_set_chained_handler(IRQ_EINT12_15, s5p64x0_irq_demux_eint12_15);
 436
 437         return ret;
 438 }
 439 arch_initcall(s5p64x0_init_irq_eint);
 440
 441 void s5p64x0_restart(char mode, const char *cmd)
 442 {
 443         if (mode != 's')
 444                 arch_wdt_reset();
 445
 446         soft_restart(0);
 447 }