arch/arm/mach-u300/core.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  *
   4  * arch/arm/mach-u300/core.c
   5  *
   6  * Copyright (C) 2007-2012 ST-Ericsson SA
   7  * Core platform support, IRQ handling and device definitions.
   8  * Author: Linus Walleij <linus.walleij@stericsson.com>
   9  */
  10 #include <linux/kernel.h>
  11 #include <linux/pinctrl/machine.h>
  12 #include <linux/pinctrl/pinconf-generic.h>
  13 #include <linux/platform_data/clk-u300.h>
  14 #include <linux/irqchip.h>
  15 #include <linux/of_address.h>
  16 #include <linux/of_platform.h>
  17 #include <linux/clocksource.h>
  18 #include <linux/clk.h>
  19
  20 #include <asm/mach/map.h>
  21 #include <asm/mach/arch.h>
  22
  23 /*
  24  * These are the large blocks of memory allocated for I/O.
  25  * the defines are used for setting up the I/O memory mapping.
  26  */
  27
  28 /* NAND Flash CS0 */
  29 #define U300_NAND_CS0_PHYS_BASE         0x80000000
  30 /* NFIF */
  31 #define U300_NAND_IF_PHYS_BASE          0x9f800000
  32 /* ALE, CLE offset for FSMC NAND */
  33 #define PLAT_NAND_CLE                   (1 << 16)
  34 #define PLAT_NAND_ALE                   (1 << 17)
  35 /* AHB Peripherals */
  36 #define U300_AHB_PER_PHYS_BASE          0xa0000000
  37 #define U300_AHB_PER_VIRT_BASE          0xff010000
  38 /* FAST Peripherals */
  39 #define U300_FAST_PER_PHYS_BASE         0xc0000000
  40 #define U300_FAST_PER_VIRT_BASE         0xff020000
  41 /* SLOW Peripherals */
  42 #define U300_SLOW_PER_PHYS_BASE         0xc0010000
  43 #define U300_SLOW_PER_VIRT_BASE         0xff000000
  44 /* Boot ROM */
  45 #define U300_BOOTROM_PHYS_BASE          0xffff0000
  46 #define U300_BOOTROM_VIRT_BASE          0xffff0000
  47 /* SEMI config base */
  48 #define U300_SEMI_CONFIG_BASE           0x2FFE0000
  49
  50 /*
  51  * AHB peripherals
  52  */
  53
  54 /* AHB Peripherals Bridge Controller */
  55 #define U300_AHB_BRIDGE_BASE            (U300_AHB_PER_PHYS_BASE+0x0000)
  56 /* Vectored Interrupt Controller 0, servicing 32 interrupts */
  57 #define U300_INTCON0_BASE               (U300_AHB_PER_PHYS_BASE+0x1000)
  58 #define U300_INTCON0_VBASE              IOMEM(U300_AHB_PER_VIRT_BASE+0x1000)
  59 /* Vectored Interrupt Controller 1, servicing 32 interrupts */
  60 #define U300_INTCON1_BASE               (U300_AHB_PER_PHYS_BASE+0x2000)
  61 #define U300_INTCON1_VBASE              IOMEM(U300_AHB_PER_VIRT_BASE+0x2000)
  62 /* Memory Stick Pro (MSPRO) controller */
  63 #define U300_MSPRO_BASE                 (U300_AHB_PER_PHYS_BASE+0x3000)
  64 /* EMIF Configuration Area */
  65 #define U300_EMIF_CFG_BASE              (U300_AHB_PER_PHYS_BASE+0x4000)
  66
  67 /*
  68  * FAST peripherals
  69  */
  70
  71 /* FAST bridge control */
  72 #define U300_FAST_BRIDGE_BASE           (U300_FAST_PER_PHYS_BASE+0x0000)
  73 /* MMC/SD controller */
  74 #define U300_MMCSD_BASE                 (U300_FAST_PER_PHYS_BASE+0x1000)
  75 /* PCM I2S0 controller */
  76 #define U300_PCM_I2S0_BASE              (U300_FAST_PER_PHYS_BASE+0x2000)
  77 /* PCM I2S1 controller */
  78 #define U300_PCM_I2S1_BASE              (U300_FAST_PER_PHYS_BASE+0x3000)
  79 /* I2C0 controller */
  80 #define U300_I2C0_BASE                  (U300_FAST_PER_PHYS_BASE+0x4000)
  81 /* I2C1 controller */
  82 #define U300_I2C1_BASE                  (U300_FAST_PER_PHYS_BASE+0x5000)
  83 /* SPI controller */
  84 #define U300_SPI_BASE                   (U300_FAST_PER_PHYS_BASE+0x6000)
  85 /* Fast UART1 on U335 only */
  86 #define U300_UART1_BASE                 (U300_FAST_PER_PHYS_BASE+0x7000)
  87
  88 /*
  89  * SLOW peripherals
  90  */
  91
  92 /* SLOW bridge control */
  93 #define U300_SLOW_BRIDGE_BASE           (U300_SLOW_PER_PHYS_BASE)
  94 /* SYSCON */
  95 #define U300_SYSCON_BASE                (U300_SLOW_PER_PHYS_BASE+0x1000)
  96 #define U300_SYSCON_VBASE               IOMEM(U300_SLOW_PER_VIRT_BASE+0x1000)
  97 /* Watchdog */
  98 #define U300_WDOG_BASE                  (U300_SLOW_PER_PHYS_BASE+0x2000)
  99 /* UART0 */
 100 #define U300_UART0_BASE                 (U300_SLOW_PER_PHYS_BASE+0x3000)
 101 /* APP side special timer */
 102 #define U300_TIMER_APP_BASE             (U300_SLOW_PER_PHYS_BASE+0x4000)
 103 #define U300_TIMER_APP_VBASE            IOMEM(U300_SLOW_PER_VIRT_BASE+0x4000)
 104 /* Keypad */
 105 #define U300_KEYPAD_BASE                (U300_SLOW_PER_PHYS_BASE+0x5000)
 106 /* GPIO */
 107 #define U300_GPIO_BASE                  (U300_SLOW_PER_PHYS_BASE+0x6000)
 108 /* RTC */
 109 #define U300_RTC_BASE                   (U300_SLOW_PER_PHYS_BASE+0x7000)
 110 /* Bus tracer */
 111 #define U300_BUSTR_BASE                 (U300_SLOW_PER_PHYS_BASE+0x8000)
 112 /* Event handler (hardware queue) */
 113 #define U300_EVHIST_BASE                (U300_SLOW_PER_PHYS_BASE+0x9000)
 114 /* Genric Timer */
 115 #define U300_TIMER_BASE                 (U300_SLOW_PER_PHYS_BASE+0xa000)
 116 /* PPM */
 117 #define U300_PPM_BASE                   (U300_SLOW_PER_PHYS_BASE+0xb000)
 118
 119 /*
 120  * REST peripherals
 121  */
 122
 123 /* ISP (image signal processor) */
 124 #define U300_ISP_BASE                   (0xA0008000)
 125 /* DMA Controller base */
 126 #define U300_DMAC_BASE                  (0xC0020000)
 127 /* MSL Base */
 128 #define U300_MSL_BASE                   (0xc0022000)
 129 /* APEX Base */
 130 #define U300_APEX_BASE                  (0xc0030000)
 131 /* Video Encoder Base */
 132 #define U300_VIDEOENC_BASE              (0xc0080000)
 133 /* XGAM Base */
 134 #define U300_XGAM_BASE                  (0xd0000000)
 135
 136 /*
 137  * SYSCON addresses applicable to the core machine.
 138  */
 139
 140 /* Chip ID register 16bit (R/-) */
 141 #define U300_SYSCON_CIDR                                        (0x400)
 142 /* SMCR */
 143 #define U300_SYSCON_SMCR                                        (0x4d0)
 144 #define U300_SYSCON_SMCR_FIELD_MASK                             (0x000e)
 145 #define U300_SYSCON_SMCR_SEMI_SREFACK_IND                       (0x0008)
 146 #define U300_SYSCON_SMCR_SEMI_SREFREQ_ENABLE                    (0x0004)
 147 #define U300_SYSCON_SMCR_SEMI_EXT_BOOT_MODE_ENABLE              (0x0002)
 148 /* CPU_SW_DBGEN Software Debug Enable 16bit (R/W) */
 149 #define U300_SYSCON_CSDR                                        (0x4f0)
 150 #define U300_SYSCON_CSDR_SW_DEBUG_ENABLE                        (0x0001)
 151 /* PRINT_CONTROL Print Control 16bit (R/-) */
 152 #define U300_SYSCON_PCR                                         (0x4f8)
 153 #define U300_SYSCON_PCR_SERV_IND                                (0x0001)
 154 /* BOOT_CONTROL 16bit (R/-) */
 155 #define U300_SYSCON_BCR                                         (0x4fc)
 156 #define U300_SYSCON_BCR_ACC_CPU_SUBSYS_VINITHI_IND              (0x0400)
 157 #define U300_SYSCON_BCR_APP_CPU_SUBSYS_VINITHI_IND              (0x0200)
 158 #define U300_SYSCON_BCR_EXTRA_BOOT_OPTION_MASK                  (0x01FC)
 159 #define U300_SYSCON_BCR_APP_BOOT_SERV_MASK                      (0x0003)
 160
 161 static void __iomem *syscon_base;
 162
 163 /*
 164  * Static I/O mappings that are needed for booting the U300 platforms. The
 165  * only things we need are the areas where we find the timer, syscon and
 166  * intcon, since the remaining device drivers will map their own memory
 167  * physical to virtual as the need arise.
 168  */
 169 static struct map_desc u300_io_desc[] __initdata = {
 170         {
 171                 .virtual        = U300_SLOW_PER_VIRT_BASE,
 172                 .pfn            = __phys_to_pfn(U300_SLOW_PER_PHYS_BASE),
 173                 .length         = SZ_64K,
 174                 .type           = MT_DEVICE,
 175         },
 176         {
 177                 .virtual        = U300_AHB_PER_VIRT_BASE,
 178                 .pfn            = __phys_to_pfn(U300_AHB_PER_PHYS_BASE),
 179                 .length         = SZ_32K,
 180                 .type           = MT_DEVICE,
 181         },
 182         {
 183                 .virtual        = U300_FAST_PER_VIRT_BASE,
 184                 .pfn            = __phys_to_pfn(U300_FAST_PER_PHYS_BASE),
 185                 .length         = SZ_32K,
 186                 .type           = MT_DEVICE,
 187         },
 188 };
 189
 190 static void __init u300_map_io(void)
 191 {
 192         iotable_init(u300_io_desc, ARRAY_SIZE(u300_io_desc));
 193 }
 194
 195 static unsigned long pin_pullup_conf[] = {
 196         PIN_CONF_PACKED(PIN_CONFIG_BIAS_PULL_UP, 1),
 197 };
 198
 199 static unsigned long pin_highz_conf[] = {
 200         PIN_CONF_PACKED(PIN_CONFIG_BIAS_HIGH_IMPEDANCE, 0),
 201 };
 202
 203 /* Pin control settings */
 204 static const struct pinctrl_map u300_pinmux_map[] = {
 205         /* anonymous maps for chip power and EMIFs */
 206         PIN_MAP_MUX_GROUP_HOG_DEFAULT("pinctrl-u300", NULL, "power"),
 207         PIN_MAP_MUX_GROUP_HOG_DEFAULT("pinctrl-u300", NULL, "emif0"),
 208         PIN_MAP_MUX_GROUP_HOG_DEFAULT("pinctrl-u300", NULL, "emif1"),
 209         /* per-device maps for MMC/SD, SPI and UART */
 210         PIN_MAP_MUX_GROUP_DEFAULT("mmci",  "pinctrl-u300", NULL, "mmc0"),
 211         PIN_MAP_MUX_GROUP_DEFAULT("pl022", "pinctrl-u300", NULL, "spi0"),
 212         PIN_MAP_MUX_GROUP_DEFAULT("uart0", "pinctrl-u300", NULL, "uart0"),
 213         /* This pin is used for clock return rather than GPIO */
 214         PIN_MAP_CONFIGS_PIN_DEFAULT("mmci", "pinctrl-u300", "PIO APP GPIO 11",
 215                                     pin_pullup_conf),
 216         /* This pin is used for card detect */
 217         PIN_MAP_CONFIGS_PIN_DEFAULT("mmci", "pinctrl-u300", "PIO MS INS",
 218                                     pin_highz_conf),
 219 };
 220
 221 struct db_chip {
 222         u16 chipid;
 223         const char *name;
 224 };
 225
 226 /*
 227  * This is a list of the Digital Baseband chips used in the U300 platform.
 228  */
 229 static struct db_chip db_chips[] __initdata = {
 230         {
 231                 .chipid = 0xb800,
 232                 .name = "DB3000",
 233         },
 234         {
 235                 .chipid = 0xc000,
 236                 .name = "DB3100",
 237         },
 238         {
 239                 .chipid = 0xc800,
 240                 .name = "DB3150",
 241         },
 242         {
 243                 .chipid = 0xd800,
 244                 .name = "DB3200",
 245         },
 246         {
 247                 .chipid = 0xe000,
 248                 .name = "DB3250",
 249         },
 250         {
 251                 .chipid = 0xe800,
 252                 .name = "DB3210",
 253         },
 254         {
 255                 .chipid = 0xf000,
 256                 .name = "DB3350 P1x",
 257         },
 258         {
 259                 .chipid = 0xf100,
 260                 .name = "DB3350 P2x",
 261         },
 262         {
 263                 .chipid = 0x0000, /* List terminator */
 264                 .name = NULL,
 265         }
 266 };
 267
 268 static void __init u300_init_check_chip(void)
 269 {
 270
 271         u16 val;
 272         struct db_chip *chip;
 273         const char *chipname;
 274         const char unknown[] = "UNKNOWN";
 275
 276         /* Read out and print chip ID */
 277         val = readw(syscon_base + U300_SYSCON_CIDR);
 278         /* This is in funky bigendian order... */
 279         val = (val & 0xFFU) << 8 | (val >> 8);
 280         chip = db_chips;
 281         chipname = unknown;
 282
 283         for ( ; chip->chipid; chip++) {
 284                 if (chip->chipid == (val & 0xFF00U)) {
 285                         chipname = chip->name;
 286                         break;
 287                 }
 288         }
 289         printk(KERN_INFO "Initializing U300 system on %s baseband chip " \
 290                "(chip ID 0x%04x)\n", chipname, val);
 291
 292         if ((val & 0xFF00U) != 0xf000 && (val & 0xFF00U) != 0xf100) {
 293                 printk(KERN_ERR "Platform configured for BS335 " \
 294                        " with DB3350 but %s detected, expect problems!",
 295                        chipname);
 296         }
 297 }
 298
 299 /* Forward declare this function from the watchdog */
 300 void coh901327_watchdog_reset(void);
 301
 302 static void u300_restart(enum reboot_mode mode, const char *cmd)
 303 {
 304         switch (mode) {
 305         case REBOOT_SOFT:
 306         case REBOOT_HARD:
 307 #ifdef CONFIG_COH901327_WATCHDOG
 308                 coh901327_watchdog_reset();
 309 #endif
 310                 break;
 311         default:
 312                 /* Do nothing */
 313                 break;
 314         }
 315         /* Wait for system do die/reset. */
 316         while (1);
 317 }
 318
 319 /* These are mostly to get the right device names for the clock lookups */
 320 static struct of_dev_auxdata u300_auxdata_lookup[] __initdata = {
 321         OF_DEV_AUXDATA("stericsson,pinctrl-u300", U300_SYSCON_BASE,
 322                 "pinctrl-u300", NULL),
 323         OF_DEV_AUXDATA("stericsson,gpio-coh901", U300_GPIO_BASE,
 324                 "u300-gpio", NULL),
 325         OF_DEV_AUXDATA("stericsson,coh901327", U300_WDOG_BASE,
 326                 "coh901327_wdog", NULL),
 327         OF_DEV_AUXDATA("stericsson,coh901331", U300_RTC_BASE,
 328                 "rtc-coh901331", NULL),
 329         OF_DEV_AUXDATA("stericsson,coh901318", U300_DMAC_BASE,
 330                 "coh901318", NULL),
 331         OF_DEV_AUXDATA("stericsson,fsmc-nand", U300_NAND_IF_PHYS_BASE,
 332                 "fsmc-nand", NULL),
 333         OF_DEV_AUXDATA("arm,primecell", U300_UART0_BASE,
 334                 "uart0", NULL),
 335         OF_DEV_AUXDATA("arm,primecell", U300_UART1_BASE,
 336                 "uart1", NULL),
 337         OF_DEV_AUXDATA("arm,primecell", U300_SPI_BASE,
 338                 "pl022", NULL),
 339         OF_DEV_AUXDATA("st,ddci2c", U300_I2C0_BASE,
 340                 "stu300.0", NULL),
 341         OF_DEV_AUXDATA("st,ddci2c", U300_I2C1_BASE,
 342                 "stu300.1", NULL),
 343         OF_DEV_AUXDATA("arm,primecell", U300_MMCSD_BASE,
 344                 "mmci", NULL),
 345         { /* sentinel */ },
 346 };
 347
 348 static void __init u300_init_irq_dt(void)
 349 {
 350         struct device_node *syscon;
 351         struct clk *clk;
 352
 353         syscon = of_find_node_by_path("/syscon@c0011000");
 354         if (!syscon) {
 355                 pr_crit("could not find syscon node\n");
 356                 return;
 357         }
 358         syscon_base = of_iomap(syscon, 0);
 359         if (!syscon_base) {
 360                 pr_crit("could not remap syscon\n");
 361                 return;
 362         }
 363         /* initialize clocking early, we want to clock the INTCON */
 364         u300_clk_init(syscon_base);
 365
 366         /* Bootstrap EMIF and SEMI clocks */
 367         clk = clk_get_sys("pl172", NULL);
 368         BUG_ON(IS_ERR(clk));
 369         clk_prepare_enable(clk);
 370         clk = clk_get_sys("semi", NULL);
 371         BUG_ON(IS_ERR(clk));
 372         clk_prepare_enable(clk);
 373
 374         /* Clock the interrupt controller */
 375         clk = clk_get_sys("intcon", NULL);
 376         BUG_ON(IS_ERR(clk));
 377         clk_prepare_enable(clk);
 378
 379         irqchip_init();
 380 }
 381
 382 static void __init u300_init_machine_dt(void)
 383 {
 384         u16 val;
 385
 386         /* Check what platform we run and print some status information */
 387         u300_init_check_chip();
 388
 389         /* Initialize pinmuxing */
 390         pinctrl_register_mappings(u300_pinmux_map,
 391                                   ARRAY_SIZE(u300_pinmux_map));
 392
 393         of_platform_default_populate(NULL, u300_auxdata_lookup, NULL);
 394
 395         /* Enable SEMI self refresh */
 396         val = readw(syscon_base + U300_SYSCON_SMCR) |
 397                 U300_SYSCON_SMCR_SEMI_SREFREQ_ENABLE;
 398         writew(val, syscon_base + U300_SYSCON_SMCR);
 399 }
 400
 401 static const char * u300_board_compat[] = {
 402         "stericsson,u300",
 403         NULL,
 404 };
 405
 406 DT_MACHINE_START(U300_DT, "U300 S335/B335 (Device Tree)")
 407         .map_io         = u300_map_io,
 408         .init_irq       = u300_init_irq_dt,
 409         .init_time      = timer_probe,
 410         .init_machine   = u300_init_machine_dt,
 411         .restart        = u300_restart,
 412         .dt_compat      = u300_board_compat,
 413 MACHINE_END