arch/arm/mach-sa1100/generic.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * linux/arch/arm/mach-sa1100/generic.c
   4  *
   5  * Author: Nicolas Pitre
   6  *
   7  * Code common to all SA11x0 machines.
   8  */
   9 #include <linux/gpio.h>
  10 #include <linux/gpio/machine.h>
  11 #include <linux/module.h>
  12 #include <linux/kernel.h>
  13 #include <linux/init.h>
  14 #include <linux/delay.h>
  15 #include <linux/dma-mapping.h>
  16 #include <linux/pm.h>
  17 #include <linux/cpufreq.h>
  18 #include <linux/ioport.h>
  19 #include <linux/platform_device.h>
  20 #include <linux/reboot.h>
  21 #include <linux/regulator/fixed.h>
  22 #include <linux/regulator/machine.h>
  23 #include <linux/irqchip/irq-sa11x0.h>
  24
  25 #include <video/sa1100fb.h>
  26
  27 #include <soc/sa1100/pwer.h>
  28
  29 #include <asm/div64.h>
  30 #include <asm/mach/map.h>
  31 #include <asm/mach/flash.h>
  32 #include <asm/irq.h>
  33 #include <asm/system_misc.h>
  34
  35 #include <mach/hardware.h>
  36 #include <mach/irqs.h>
  37 #include <mach/reset.h>
  38
  39 #include "generic.h"
  40 #include <clocksource/pxa.h>
  41
  42 unsigned int reset_status;
  43 EXPORT_SYMBOL(reset_status);
  44
  45 #define NR_FREQS        16
  46
  47 /*
  48  * This table is setup for a 3.6864MHz Crystal.
  49  */
  50 struct cpufreq_frequency_table sa11x0_freq_table[NR_FREQS+1] = {
  51         { .frequency = 59000,   /*  59.0 MHz */},
  52         { .frequency = 73700,   /*  73.7 MHz */},
  53         { .frequency = 88500,   /*  88.5 MHz */},
  54         { .frequency = 103200,  /* 103.2 MHz */},
  55         { .frequency = 118000,  /* 118.0 MHz */},
  56         { .frequency = 132700,  /* 132.7 MHz */},
  57         { .frequency = 147500,  /* 147.5 MHz */},
  58         { .frequency = 162200,  /* 162.2 MHz */},
  59         { .frequency = 176900,  /* 176.9 MHz */},
  60         { .frequency = 191700,  /* 191.7 MHz */},
  61         { .frequency = 206400,  /* 206.4 MHz */},
  62         { .frequency = 221200,  /* 221.2 MHz */},
  63         { .frequency = 235900,  /* 235.9 MHz */},
  64         { .frequency = 250700,  /* 250.7 MHz */},
  65         { .frequency = 265400,  /* 265.4 MHz */},
  66         { .frequency = 280200,  /* 280.2 MHz */},
  67         { .frequency = CPUFREQ_TABLE_END, },
  68 };
  69
  70 unsigned int sa11x0_getspeed(unsigned int cpu)
  71 {
  72         if (cpu)
  73                 return 0;
  74         return sa11x0_freq_table[PPCR & 0xf].frequency;
  75 }
  76
  77 /*
  78  * Default power-off for SA1100
  79  */
  80 static void sa1100_power_off(void)
  81 {
  82         mdelay(100);
  83         local_irq_disable();
  84         /* disable internal oscillator, float CS lines */
  85         PCFR = (PCFR_OPDE | PCFR_FP | PCFR_FS);
  86         /* enable wake-up on GPIO0 (Assabet...) */
  87         PWER = GFER = GRER = 1;
  88         /*
  89          * set scratchpad to zero, just in case it is used as a
  90          * restart address by the bootloader.
  91          */
  92         PSPR = 0;
  93         /* enter sleep mode */
  94         PMCR = PMCR_SF;
  95 }
  96
  97 void sa11x0_restart(enum reboot_mode mode, const char *cmd)
  98 {
  99         clear_reset_status(RESET_STATUS_ALL);
 100
 101         if (mode == REBOOT_SOFT) {
 102                 /* Jump into ROM at address 0 */
 103                 soft_restart(0);
 104         } else {
 105                 /* Use on-chip reset capability */
 106                 RSRR = RSRR_SWR;
 107         }
 108 }
 109
 110 static void sa11x0_register_device(struct platform_device *dev, void *data)
 111 {
 112         int err;
 113         dev->dev.platform_data = data;
 114         err = platform_device_register(dev);
 115         if (err)
 116                 printk(KERN_ERR "Unable to register device %s: %d\n",
 117                         dev->name, err);
 118 }
 119
 120
 121 static struct resource sa11x0udc_resources[] = {
 122         [0] = DEFINE_RES_MEM(__PREG(Ser0UDCCR), SZ_64K),
 123         [1] = DEFINE_RES_IRQ(IRQ_Ser0UDC),
 124 };
 125
 126 static u64 sa11x0udc_dma_mask = 0xffffffffUL;
 127
 128 static struct platform_device sa11x0udc_device = {
 129         .name           = "sa11x0-udc",
 130         .id             = -1,
 131         .dev            = {
 132                 .dma_mask = &sa11x0udc_dma_mask,
 133                 .coherent_dma_mask = 0xffffffff,
 134         },
 135         .num_resources  = ARRAY_SIZE(sa11x0udc_resources),
 136         .resource       = sa11x0udc_resources,
 137 };
 138
 139 static struct resource sa11x0uart1_resources[] = {
 140         [0] = DEFINE_RES_MEM(__PREG(Ser1UTCR0), SZ_64K),
 141         [1] = DEFINE_RES_IRQ(IRQ_Ser1UART),
 142 };
 143
 144 static struct platform_device sa11x0uart1_device = {
 145         .name           = "sa11x0-uart",
 146         .id             = 1,
 147         .num_resources  = ARRAY_SIZE(sa11x0uart1_resources),
 148         .resource       = sa11x0uart1_resources,
 149 };
 150
 151 static struct resource sa11x0uart3_resources[] = {
 152         [0] = DEFINE_RES_MEM(__PREG(Ser3UTCR0), SZ_64K),
 153         [1] = DEFINE_RES_IRQ(IRQ_Ser3UART),
 154 };
 155
 156 static struct platform_device sa11x0uart3_device = {
 157         .name           = "sa11x0-uart",
 158         .id             = 3,
 159         .num_resources  = ARRAY_SIZE(sa11x0uart3_resources),
 160         .resource       = sa11x0uart3_resources,
 161 };
 162
 163 static struct resource sa11x0mcp_resources[] = {
 164         [0] = DEFINE_RES_MEM(__PREG(Ser4MCCR0), SZ_64K),
 165         [1] = DEFINE_RES_MEM(__PREG(Ser4MCCR1), 4),
 166         [2] = DEFINE_RES_IRQ(IRQ_Ser4MCP),
 167 };
 168
 169 static u64 sa11x0mcp_dma_mask = 0xffffffffUL;
 170
 171 static struct platform_device sa11x0mcp_device = {
 172         .name           = "sa11x0-mcp",
 173         .id             = -1,
 174         .dev = {
 175                 .dma_mask = &sa11x0mcp_dma_mask,
 176                 .coherent_dma_mask = 0xffffffff,
 177         },
 178         .num_resources  = ARRAY_SIZE(sa11x0mcp_resources),
 179         .resource       = sa11x0mcp_resources,
 180 };
 181
 182 void __init sa11x0_ppc_configure_mcp(void)
 183 {
 184         /* Setup the PPC unit for the MCP */
 185         PPDR &= ~PPC_RXD4;
 186         PPDR |= PPC_TXD4 | PPC_SCLK | PPC_SFRM;
 187         PSDR |= PPC_RXD4;
 188         PSDR &= ~(PPC_TXD4 | PPC_SCLK | PPC_SFRM);
 189         PPSR &= ~(PPC_TXD4 | PPC_SCLK | PPC_SFRM);
 190 }
 191
 192 void sa11x0_register_mcp(struct mcp_plat_data *data)
 193 {
 194         sa11x0_register_device(&sa11x0mcp_device, data);
 195 }
 196
 197 static struct resource sa11x0ssp_resources[] = {
 198         [0] = DEFINE_RES_MEM(0x80070000, SZ_64K),
 199         [1] = DEFINE_RES_IRQ(IRQ_Ser4SSP),
 200 };
 201
 202 static u64 sa11x0ssp_dma_mask = 0xffffffffUL;
 203
 204 static struct platform_device sa11x0ssp_device = {
 205         .name           = "sa11x0-ssp",
 206         .id             = -1,
 207         .dev = {
 208                 .dma_mask = &sa11x0ssp_dma_mask,
 209                 .coherent_dma_mask = 0xffffffff,
 210         },
 211         .num_resources  = ARRAY_SIZE(sa11x0ssp_resources),
 212         .resource       = sa11x0ssp_resources,
 213 };
 214
 215 static struct resource sa11x0fb_resources[] = {
 216         [0] = DEFINE_RES_MEM(0xb0100000, SZ_64K),
 217         [1] = DEFINE_RES_IRQ(IRQ_LCD),
 218 };
 219
 220 static struct platform_device sa11x0fb_device = {
 221         .name           = "sa11x0-fb",
 222         .id             = -1,
 223         .dev = {
 224                 .coherent_dma_mask = 0xffffffff,
 225         },
 226         .num_resources  = ARRAY_SIZE(sa11x0fb_resources),
 227         .resource       = sa11x0fb_resources,
 228 };
 229
 230 void sa11x0_register_lcd(struct sa1100fb_mach_info *inf)
 231 {
 232         sa11x0_register_device(&sa11x0fb_device, inf);
 233 }
 234
 235 void sa11x0_register_pcmcia(int socket, struct gpiod_lookup_table *table)
 236 {
 237         if (table)
 238                 gpiod_add_lookup_table(table);
 239         platform_device_register_simple("sa11x0-pcmcia", socket, NULL, 0);
 240 }
 241
 242 static struct platform_device sa11x0mtd_device = {
 243         .name           = "sa1100-mtd",
 244         .id             = -1,
 245 };
 246
 247 void sa11x0_register_mtd(struct flash_platform_data *flash,
 248                          struct resource *res, int nr)
 249 {
 250         flash->name = "sa1100";
 251         sa11x0mtd_device.resource = res;
 252         sa11x0mtd_device.num_resources = nr;
 253         sa11x0_register_device(&sa11x0mtd_device, flash);
 254 }
 255
 256 static struct resource sa11x0ir_resources[] = {
 257         DEFINE_RES_MEM(__PREG(Ser2UTCR0), 0x24),
 258         DEFINE_RES_MEM(__PREG(Ser2HSCR0), 0x1c),
 259         DEFINE_RES_MEM(__PREG(Ser2HSCR2), 0x04),
 260         DEFINE_RES_IRQ(IRQ_Ser2ICP),
 261 };
 262
 263 static struct platform_device sa11x0ir_device = {
 264         .name           = "sa11x0-ir",
 265         .id             = -1,
 266         .num_resources  = ARRAY_SIZE(sa11x0ir_resources),
 267         .resource       = sa11x0ir_resources,
 268 };
 269
 270 void sa11x0_register_irda(struct irda_platform_data *irda)
 271 {
 272         sa11x0_register_device(&sa11x0ir_device, irda);
 273 }
 274
 275 static struct resource sa1100_rtc_resources[] = {
 276         DEFINE_RES_MEM(0x90010000, 0x40),
 277         DEFINE_RES_IRQ_NAMED(IRQ_RTC1Hz, "rtc 1Hz"),
 278         DEFINE_RES_IRQ_NAMED(IRQ_RTCAlrm, "rtc alarm"),
 279 };
 280
 281 static struct platform_device sa11x0rtc_device = {
 282         .name           = "sa1100-rtc",
 283         .id             = -1,
 284         .num_resources  = ARRAY_SIZE(sa1100_rtc_resources),
 285         .resource       = sa1100_rtc_resources,
 286 };
 287
 288 static struct resource sa11x0dma_resources[] = {
 289         DEFINE_RES_MEM(DMA_PHYS, DMA_SIZE),
 290         DEFINE_RES_IRQ(IRQ_DMA0),
 291         DEFINE_RES_IRQ(IRQ_DMA1),
 292         DEFINE_RES_IRQ(IRQ_DMA2),
 293         DEFINE_RES_IRQ(IRQ_DMA3),
 294         DEFINE_RES_IRQ(IRQ_DMA4),
 295         DEFINE_RES_IRQ(IRQ_DMA5),
 296 };
 297
 298 static u64 sa11x0dma_dma_mask = DMA_BIT_MASK(32);
 299
 300 static struct platform_device sa11x0dma_device = {
 301         .name           = "sa11x0-dma",
 302         .id             = -1,
 303         .dev = {
 304                 .dma_mask = &sa11x0dma_dma_mask,
 305                 .coherent_dma_mask = 0xffffffff,
 306         },
 307         .num_resources  = ARRAY_SIZE(sa11x0dma_resources),
 308         .resource       = sa11x0dma_resources,
 309 };
 310
 311 static struct platform_device *sa11x0_devices[] __initdata = {
 312         &sa11x0udc_device,
 313         &sa11x0uart1_device,
 314         &sa11x0uart3_device,
 315         &sa11x0ssp_device,
 316         &sa11x0rtc_device,
 317         &sa11x0dma_device,
 318 };
 319
 320 static int __init sa1100_init(void)
 321 {
 322         pm_power_off = sa1100_power_off;
 323
 324         regulator_has_full_constraints();
 325
 326         return platform_add_devices(sa11x0_devices, ARRAY_SIZE(sa11x0_devices));
 327 }
 328
 329 arch_initcall(sa1100_init);
 330
 331 void __init sa11x0_init_late(void)
 332 {
 333         sa11x0_pm_init();
 334 }
 335
 336 int __init sa11x0_register_fixed_regulator(int n,
 337         struct fixed_voltage_config *cfg,
 338         struct regulator_consumer_supply *supplies, unsigned num_supplies,
 339         bool uses_gpio)
 340 {
 341         struct regulator_init_data *id;
 342
 343         cfg->init_data = id = kzalloc(sizeof(*cfg->init_data), GFP_KERNEL);
 344         if (!cfg->init_data)
 345                 return -ENOMEM;
 346
 347         if (!uses_gpio)
 348                 id->constraints.always_on = 1;
 349         id->constraints.name = cfg->supply_name;
 350         id->constraints.min_uV = cfg->microvolts;
 351         id->constraints.max_uV = cfg->microvolts;
 352         id->constraints.valid_modes_mask = REGULATOR_MODE_NORMAL;
 353         id->constraints.valid_ops_mask = REGULATOR_CHANGE_STATUS;
 354         id->consumer_supplies = supplies;
 355         id->num_consumer_supplies = num_supplies;
 356
 357         platform_device_register_resndata(NULL, "reg-fixed-voltage", n,
 358                                           NULL, 0, cfg, sizeof(*cfg));
 359         return 0;
 360 }
 361
 362 /*
 363  * Common I/O mapping:
 364  *
 365  * Typically, static virtual address mappings are as follow:
 366  *
 367  * 0xf0000000-0xf3ffffff:       miscellaneous stuff (CPLDs, etc.)
 368  * 0xf4000000-0xf4ffffff:       SA-1111
 369  * 0xf5000000-0xf5ffffff:       reserved (used by cache flushing area)
 370  * 0xf6000000-0xfffeffff:       reserved (internal SA1100 IO defined above)
 371  * 0xffff0000-0xffff0fff:       SA1100 exception vectors
 372  * 0xffff2000-0xffff2fff:       Minicache copy_user_page area
 373  *
 374  * Below 0xe8000000 is reserved for vm allocation.
 375  *
 376  * The machine specific code must provide the extra mapping beside the
 377  * default mapping provided here.
 378  */
 379
 380 static struct map_desc standard_io_desc[] __initdata = {
 381         {       /* PCM */
 382                 .virtual        =  0xf8000000,
 383                 .pfn            = __phys_to_pfn(0x80000000),
 384                 .length         = 0x00100000,
 385                 .type           = MT_DEVICE
 386         }, {    /* SCM */
 387                 .virtual        =  0xfa000000,
 388                 .pfn            = __phys_to_pfn(0x90000000),
 389                 .length         = 0x00100000,
 390                 .type           = MT_DEVICE
 391         }, {    /* MER */
 392                 .virtual        =  0xfc000000,
 393                 .pfn            = __phys_to_pfn(0xa0000000),
 394                 .length         = 0x00100000,
 395                 .type           = MT_DEVICE
 396         }, {    /* LCD + DMA */
 397                 .virtual        =  0xfe000000,
 398                 .pfn            = __phys_to_pfn(0xb0000000),
 399                 .length         = 0x00200000,
 400                 .type           = MT_DEVICE
 401         },
 402 };
 403
 404 void __init sa1100_map_io(void)
 405 {
 406         iotable_init(standard_io_desc, ARRAY_SIZE(standard_io_desc));
 407 }
 408
 409 void __init sa1100_timer_init(void)
 410 {
 411         pxa_timer_nodt_init(IRQ_OST0, io_p2v(0x90000000));
 412 }
 413
 414 static struct resource irq_resource =
 415         DEFINE_RES_MEM_NAMED(0x90050000, SZ_64K, "irqs");
 416
 417 void __init sa1100_init_irq(void)
 418 {
 419         request_resource(&iomem_resource, &irq_resource);
 420
 421         sa11x0_init_irq_nodt(IRQ_GPIO0_SC, irq_resource.start);
 422
 423         sa1100_init_gpio();
 424         sa11xx_clk_init();
 425 }
 426
 427 /*
 428  * Disable the memory bus request/grant signals on the SA1110 to
 429  * ensure that we don't receive spurious memory requests.  We set
 430  * the MBGNT signal false to ensure the SA1111 doesn't own the
 431  * SDRAM bus.
 432  */
 433 void sa1110_mb_disable(void)
 434 {
 435         unsigned long flags;
 436
 437         local_irq_save(flags);
 438
 439         PGSR &= ~GPIO_MBGNT;
 440         GPCR = GPIO_MBGNT;
 441         GPDR = (GPDR & ~GPIO_MBREQ) | GPIO_MBGNT;
 442
 443         GAFR &= ~(GPIO_MBGNT | GPIO_MBREQ);
 444
 445         local_irq_restore(flags);
 446 }
 447
 448 /*
 449  * If the system is going to use the SA-1111 DMA engines, set up
 450  * the memory bus request/grant pins.
 451  */
 452 void sa1110_mb_enable(void)
 453 {
 454         unsigned long flags;
 455
 456         local_irq_save(flags);
 457
 458         PGSR &= ~GPIO_MBGNT;
 459         GPCR = GPIO_MBGNT;
 460         GPDR = (GPDR & ~GPIO_MBREQ) | GPIO_MBGNT;
 461
 462         GAFR |= (GPIO_MBGNT | GPIO_MBREQ);
 463         TUCR |= TUCR_MR;
 464
 465         local_irq_restore(flags);
 466 }
 467
 468 int sa11x0_gpio_set_wake(unsigned int gpio, unsigned int on)
 469 {
 470         if (on)
 471                 PWER |= BIT(gpio);
 472         else
 473                 PWER &= ~BIT(gpio);
 474
 475         return 0;
 476 }
 477
 478 int sa11x0_sc_set_wake(unsigned int irq, unsigned int on)
 479 {
 480         if (BIT(irq) != IC_RTCAlrm)
 481                 return -EINVAL;
 482
 483         if (on)
 484                 PWER |= PWER_RTC;
 485         else
 486                 PWER &= ~PWER_RTC;
 487
 488         return 0;
 489 }