arch/arm/mach-shmobile/setup-r8a7740.c

   1 /*
   2  * R8A7740 processor support
   3  *
   4  * Copyright (C) 2011  Renesas Solutions Corp.
   5  * Copyright (C) 2011  Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
   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 as published by
   9  * the Free Software Foundation; version 2 of the License.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  19  */
  20 #include <linux/delay.h>
  21 #include <linux/kernel.h>
  22 #include <linux/init.h>
  23 #include <linux/io.h>
  24 #include <linux/platform_device.h>
  25 #include <linux/serial_sci.h>
  26 #include <linux/sh_timer.h>
  27 #include <mach/r8a7740.h>
  28 #include <asm/mach-types.h>
  29 #include <asm/mach/arch.h>
  30
  31 /* SCIFA0 */
  32 static struct plat_sci_port scif0_platform_data = {
  33         .mapbase        = 0xe6c40000,
  34         .flags          = UPF_BOOT_AUTOCONF,
  35         .scscr          = SCSCR_RE | SCSCR_TE,
  36         .scbrr_algo_id  = SCBRR_ALGO_4,
  37         .type           = PORT_SCIFA,
  38         .irqs           = SCIx_IRQ_MUXED(evt2irq(0x0c00)),
  39 };
  40
  41 static struct platform_device scif0_device = {
  42         .name           = "sh-sci",
  43         .id             = 0,
  44         .dev            = {
  45                 .platform_data  = &scif0_platform_data,
  46         },
  47 };
  48
  49 /* SCIFA1 */
  50 static struct plat_sci_port scif1_platform_data = {
  51         .mapbase        = 0xe6c50000,
  52         .flags          = UPF_BOOT_AUTOCONF,
  53         .scscr          = SCSCR_RE | SCSCR_TE,
  54         .scbrr_algo_id  = SCBRR_ALGO_4,
  55         .type           = PORT_SCIFA,
  56         .irqs           = SCIx_IRQ_MUXED(evt2irq(0x0c20)),
  57 };
  58
  59 static struct platform_device scif1_device = {
  60         .name           = "sh-sci",
  61         .id             = 1,
  62         .dev            = {
  63                 .platform_data  = &scif1_platform_data,
  64         },
  65 };
  66
  67 /* SCIFA2 */
  68 static struct plat_sci_port scif2_platform_data = {
  69         .mapbase        = 0xe6c60000,
  70         .flags          = UPF_BOOT_AUTOCONF,
  71         .scscr          = SCSCR_RE | SCSCR_TE,
  72         .scbrr_algo_id  = SCBRR_ALGO_4,
  73         .type           = PORT_SCIFA,
  74         .irqs           = SCIx_IRQ_MUXED(evt2irq(0x0c40)),
  75 };
  76
  77 static struct platform_device scif2_device = {
  78         .name           = "sh-sci",
  79         .id             = 2,
  80         .dev            = {
  81                 .platform_data  = &scif2_platform_data,
  82         },
  83 };
  84
  85 /* SCIFA3 */
  86 static struct plat_sci_port scif3_platform_data = {
  87         .mapbase        = 0xe6c70000,
  88         .flags          = UPF_BOOT_AUTOCONF,
  89         .scscr          = SCSCR_RE | SCSCR_TE,
  90         .scbrr_algo_id  = SCBRR_ALGO_4,
  91         .type           = PORT_SCIFA,
  92         .irqs           = SCIx_IRQ_MUXED(evt2irq(0x0c60)),
  93 };
  94
  95 static struct platform_device scif3_device = {
  96         .name           = "sh-sci",
  97         .id             = 3,
  98         .dev            = {
  99                 .platform_data  = &scif3_platform_data,
 100         },
 101 };
 102
 103 /* SCIFA4 */
 104 static struct plat_sci_port scif4_platform_data = {
 105         .mapbase        = 0xe6c80000,
 106         .flags          = UPF_BOOT_AUTOCONF,
 107         .scscr          = SCSCR_RE | SCSCR_TE,
 108         .scbrr_algo_id  = SCBRR_ALGO_4,
 109         .type           = PORT_SCIFA,
 110         .irqs           = SCIx_IRQ_MUXED(evt2irq(0x0d20)),
 111 };
 112
 113 static struct platform_device scif4_device = {
 114         .name           = "sh-sci",
 115         .id             = 4,
 116         .dev            = {
 117                 .platform_data  = &scif4_platform_data,
 118         },
 119 };
 120
 121 /* SCIFA5 */
 122 static struct plat_sci_port scif5_platform_data = {
 123         .mapbase        = 0xe6cb0000,
 124         .flags          = UPF_BOOT_AUTOCONF,
 125         .scscr          = SCSCR_RE | SCSCR_TE,
 126         .scbrr_algo_id  = SCBRR_ALGO_4,
 127         .type           = PORT_SCIFA,
 128         .irqs           = SCIx_IRQ_MUXED(evt2irq(0x0d40)),
 129 };
 130
 131 static struct platform_device scif5_device = {
 132         .name           = "sh-sci",
 133         .id             = 5,
 134         .dev            = {
 135                 .platform_data  = &scif5_platform_data,
 136         },
 137 };
 138
 139 /* SCIFA6 */
 140 static struct plat_sci_port scif6_platform_data = {
 141         .mapbase        = 0xe6cc0000,
 142         .flags          = UPF_BOOT_AUTOCONF,
 143         .scscr          = SCSCR_RE | SCSCR_TE,
 144         .scbrr_algo_id  = SCBRR_ALGO_4,
 145         .type           = PORT_SCIFA,
 146         .irqs           = SCIx_IRQ_MUXED(evt2irq(0x04c0)),
 147 };
 148
 149 static struct platform_device scif6_device = {
 150         .name           = "sh-sci",
 151         .id             = 6,
 152         .dev            = {
 153                 .platform_data  = &scif6_platform_data,
 154         },
 155 };
 156
 157 /* SCIFA7 */
 158 static struct plat_sci_port scif7_platform_data = {
 159         .mapbase        = 0xe6cd0000,
 160         .flags          = UPF_BOOT_AUTOCONF,
 161         .scscr          = SCSCR_RE | SCSCR_TE,
 162         .scbrr_algo_id  = SCBRR_ALGO_4,
 163         .type           = PORT_SCIFA,
 164         .irqs           = SCIx_IRQ_MUXED(evt2irq(0x04e0)),
 165 };
 166
 167 static struct platform_device scif7_device = {
 168         .name           = "sh-sci",
 169         .id             = 7,
 170         .dev            = {
 171                 .platform_data  = &scif7_platform_data,
 172         },
 173 };
 174
 175 /* SCIFB */
 176 static struct plat_sci_port scifb_platform_data = {
 177         .mapbase        = 0xe6c30000,
 178         .flags          = UPF_BOOT_AUTOCONF,
 179         .scscr          = SCSCR_RE | SCSCR_TE,
 180         .scbrr_algo_id  = SCBRR_ALGO_4,
 181         .type           = PORT_SCIFB,
 182         .irqs           = SCIx_IRQ_MUXED(evt2irq(0x0d60)),
 183 };
 184
 185 static struct platform_device scifb_device = {
 186         .name           = "sh-sci",
 187         .id             = 8,
 188         .dev            = {
 189                 .platform_data  = &scifb_platform_data,
 190         },
 191 };
 192
 193 /* CMT */
 194 static struct sh_timer_config cmt10_platform_data = {
 195         .name = "CMT10",
 196         .channel_offset = 0x10,
 197         .timer_bit = 0,
 198         .clockevent_rating = 125,
 199         .clocksource_rating = 125,
 200 };
 201
 202 static struct resource cmt10_resources[] = {
 203         [0] = {
 204                 .name   = "CMT10",
 205                 .start  = 0xe6138010,
 206                 .end    = 0xe613801b,
 207                 .flags  = IORESOURCE_MEM,
 208         },
 209         [1] = {
 210                 .start  = evt2irq(0x0b00),
 211                 .flags  = IORESOURCE_IRQ,
 212         },
 213 };
 214
 215 static struct platform_device cmt10_device = {
 216         .name           = "sh_cmt",
 217         .id             = 10,
 218         .dev = {
 219                 .platform_data  = &cmt10_platform_data,
 220         },
 221         .resource       = cmt10_resources,
 222         .num_resources  = ARRAY_SIZE(cmt10_resources),
 223 };
 224
 225 static struct platform_device *r8a7740_early_devices[] __initdata = {
 226         &scif0_device,
 227         &scif1_device,
 228         &scif2_device,
 229         &scif3_device,
 230         &scif4_device,
 231         &scif5_device,
 232         &scif6_device,
 233         &scif7_device,
 234         &scifb_device,
 235         &cmt10_device,
 236 };
 237
 238 /* I2C */
 239 static struct resource i2c0_resources[] = {
 240         [0] = {
 241                 .name   = "IIC0",
 242                 .start  = 0xfff20000,
 243                 .end    = 0xfff20425 - 1,
 244                 .flags  = IORESOURCE_MEM,
 245         },
 246         [1] = {
 247                 .start  = intcs_evt2irq(0xe00),
 248                 .end    = intcs_evt2irq(0xe60),
 249                 .flags  = IORESOURCE_IRQ,
 250         },
 251 };
 252
 253 static struct resource i2c1_resources[] = {
 254         [0] = {
 255                 .name   = "IIC1",
 256                 .start  = 0xe6c20000,
 257                 .end    = 0xe6c20425 - 1,
 258                 .flags  = IORESOURCE_MEM,
 259         },
 260         [1] = {
 261                 .start  = evt2irq(0x780), /* IIC1_ALI1 */
 262                 .end    = evt2irq(0x7e0), /* IIC1_DTEI1 */
 263                 .flags  = IORESOURCE_IRQ,
 264         },
 265 };
 266
 267 static struct platform_device i2c0_device = {
 268         .name           = "i2c-sh_mobile",
 269         .id             = 0,
 270         .resource       = i2c0_resources,
 271         .num_resources  = ARRAY_SIZE(i2c0_resources),
 272 };
 273
 274 static struct platform_device i2c1_device = {
 275         .name           = "i2c-sh_mobile",
 276         .id             = 1,
 277         .resource       = i2c1_resources,
 278         .num_resources  = ARRAY_SIZE(i2c1_resources),
 279 };
 280
 281 static struct platform_device *r8a7740_late_devices[] __initdata = {
 282         &i2c0_device,
 283         &i2c1_device,
 284 };
 285
 286 #define ICCR    0x0004
 287 #define ICSTART 0x0070
 288
 289 #define i2c_read(reg, offset)           ioread8(reg + offset)
 290 #define i2c_write(reg, offset, data)    iowrite8(data, reg + offset)
 291
 292 /*
 293  * r8a7740 chip has lasting errata on I2C I/O pad reset.
 294  * this is work-around for it.
 295  */
 296 static void r8a7740_i2c_workaround(struct platform_device *pdev)
 297 {
 298         struct resource *res;
 299         void __iomem *reg;
 300
 301         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 302         if (unlikely(!res)) {
 303                 pr_err("r8a7740 i2c workaround fail (cannot find resource)\n");
 304                 return;
 305         }
 306
 307         reg = ioremap(res->start, resource_size(res));
 308         if (unlikely(!reg)) {
 309                 pr_err("r8a7740 i2c workaround fail (cannot map IO)\n");
 310                 return;
 311         }
 312
 313         i2c_write(reg, ICCR, i2c_read(reg, ICCR) | 0x80);
 314         i2c_read(reg, ICCR); /* dummy read */
 315
 316         i2c_write(reg, ICSTART, i2c_read(reg, ICSTART) | 0x10);
 317         i2c_read(reg, ICSTART); /* dummy read */
 318
 319         mdelay(100);
 320
 321         i2c_write(reg, ICCR, 0x01);
 322         i2c_read(reg, ICCR);
 323         i2c_write(reg, ICSTART, 0x00);
 324         i2c_read(reg, ICSTART);
 325
 326         i2c_write(reg, ICCR, 0x10);
 327         mdelay(100);
 328         i2c_write(reg, ICCR, 0x00);
 329         mdelay(100);
 330         i2c_write(reg, ICCR, 0x10);
 331         mdelay(100);
 332
 333         iounmap(reg);
 334 }
 335
 336 void __init r8a7740_add_standard_devices(void)
 337 {
 338         /* I2C work-around */
 339         r8a7740_i2c_workaround(&i2c0_device);
 340         r8a7740_i2c_workaround(&i2c1_device);
 341
 342         platform_add_devices(r8a7740_early_devices,
 343                             ARRAY_SIZE(r8a7740_early_devices));
 344         platform_add_devices(r8a7740_late_devices,
 345                              ARRAY_SIZE(r8a7740_late_devices));
 346 }
 347
 348 void __init r8a7740_add_early_devices(void)
 349 {
 350         early_platform_add_devices(r8a7740_early_devices,
 351                                    ARRAY_SIZE(r8a7740_early_devices));
 352 }