| 1 | /* |
| 2 | * linux/arch/arm/mach-pxa/viper.c |
| 3 | * |
| 4 | * Support for the Arcom VIPER SBC. |
| 5 | * |
| 6 | * Author: Ian Campbell |
| 7 | * Created: Feb 03, 2003 |
| 8 | * Copyright: Arcom Control Systems |
| 9 | * |
| 10 | * Maintained by Marc Zyngier <maz@misterjones.org> |
| 11 | * <marc.zyngier@altran.com> |
| 12 | * |
| 13 | * Based on lubbock.c: |
| 14 | * Author: Nicolas Pitre |
| 15 | * Created: Jun 15, 2001 |
| 16 | * Copyright: MontaVista Software Inc. |
| 17 | * |
| 18 | * This program is free software; you can redistribute it and/or modify |
| 19 | * it under the terms of the GNU General Public License version 2 as |
| 20 | * published by the Free Software Foundation. |
| 21 | */ |
| 22 | |
| 23 | #include <linux/types.h> |
| 24 | #include <linux/memory.h> |
| 25 | #include <linux/cpu.h> |
| 26 | #include <linux/cpufreq.h> |
| 27 | #include <linux/delay.h> |
| 28 | #include <linux/fs.h> |
| 29 | #include <linux/init.h> |
| 30 | #include <linux/slab.h> |
| 31 | #include <linux/interrupt.h> |
| 32 | #include <linux/major.h> |
| 33 | #include <linux/module.h> |
| 34 | #include <linux/pm.h> |
| 35 | #include <linux/sched.h> |
| 36 | #include <linux/gpio.h> |
| 37 | #include <linux/jiffies.h> |
| 38 | #include <linux/platform_data/i2c-gpio.h> |
| 39 | #include <linux/gpio/machine.h> |
| 40 | #include <linux/platform_data/i2c-pxa.h> |
| 41 | #include <linux/serial_8250.h> |
| 42 | #include <linux/smc91x.h> |
| 43 | #include <linux/pwm.h> |
| 44 | #include <linux/pwm_backlight.h> |
| 45 | #include <linux/usb/isp116x.h> |
| 46 | #include <linux/mtd/mtd.h> |
| 47 | #include <linux/mtd/partitions.h> |
| 48 | #include <linux/mtd/physmap.h> |
| 49 | #include <linux/syscore_ops.h> |
| 50 | |
| 51 | #include "pxa25x.h" |
| 52 | #include <mach/audio.h> |
| 53 | #include <linux/platform_data/video-pxafb.h> |
| 54 | #include <mach/regs-uart.h> |
| 55 | #include <linux/platform_data/pcmcia-pxa2xx_viper.h> |
| 56 | #include "viper.h" |
| 57 | |
| 58 | #include <asm/setup.h> |
| 59 | #include <asm/mach-types.h> |
| 60 | #include <asm/irq.h> |
| 61 | #include <linux/sizes.h> |
| 62 | #include <asm/system_info.h> |
| 63 | |
| 64 | #include <asm/mach/arch.h> |
| 65 | #include <asm/mach/map.h> |
| 66 | #include <asm/mach/irq.h> |
| 67 | |
| 68 | #include "generic.h" |
| 69 | #include "devices.h" |
| 70 | |
| 71 | static unsigned int icr; |
| 72 | |
| 73 | static void viper_icr_set_bit(unsigned int bit) |
| 74 | { |
| 75 | icr |= bit; |
| 76 | VIPER_ICR = icr; |
| 77 | } |
| 78 | |
| 79 | static void viper_icr_clear_bit(unsigned int bit) |
| 80 | { |
| 81 | icr &= ~bit; |
| 82 | VIPER_ICR = icr; |
| 83 | } |
| 84 | |
| 85 | /* This function is used from the pcmcia module to reset the CF */ |
| 86 | static void viper_cf_reset(int state) |
| 87 | { |
| 88 | if (state) |
| 89 | viper_icr_set_bit(VIPER_ICR_CF_RST); |
| 90 | else |
| 91 | viper_icr_clear_bit(VIPER_ICR_CF_RST); |
| 92 | } |
| 93 | |
| 94 | static struct arcom_pcmcia_pdata viper_pcmcia_info = { |
| 95 | .cd_gpio = VIPER_CF_CD_GPIO, |
| 96 | .rdy_gpio = VIPER_CF_RDY_GPIO, |
| 97 | .pwr_gpio = VIPER_CF_POWER_GPIO, |
| 98 | .reset = viper_cf_reset, |
| 99 | }; |
| 100 | |
| 101 | static struct platform_device viper_pcmcia_device = { |
| 102 | .name = "viper-pcmcia", |
| 103 | .id = -1, |
| 104 | .dev = { |
| 105 | .platform_data = &viper_pcmcia_info, |
| 106 | }, |
| 107 | }; |
| 108 | |
| 109 | /* |
| 110 | * The CPLD version register was not present on VIPER boards prior to |
| 111 | * v2i1. On v1 boards where the version register is not present we |
| 112 | * will just read back the previous value from the databus. |
| 113 | * |
| 114 | * Therefore we do two reads. The first time we write 0 to the |
| 115 | * (read-only) register before reading and the second time we write |
| 116 | * 0xff first. If the two reads do not match or they read back as 0xff |
| 117 | * or 0x00 then we have version 1 hardware. |
| 118 | */ |
| 119 | static u8 viper_hw_version(void) |
| 120 | { |
| 121 | u8 v1, v2; |
| 122 | unsigned long flags; |
| 123 | |
| 124 | local_irq_save(flags); |
| 125 | |
| 126 | VIPER_VERSION = 0; |
| 127 | v1 = VIPER_VERSION; |
| 128 | VIPER_VERSION = 0xff; |
| 129 | v2 = VIPER_VERSION; |
| 130 | |
| 131 | v1 = (v1 != v2 || v1 == 0xff) ? 0 : v1; |
| 132 | |
| 133 | local_irq_restore(flags); |
| 134 | return v1; |
| 135 | } |
| 136 | |
| 137 | /* CPU system core operations. */ |
| 138 | static int viper_cpu_suspend(void) |
| 139 | { |
| 140 | viper_icr_set_bit(VIPER_ICR_R_DIS); |
| 141 | return 0; |
| 142 | } |
| 143 | |
| 144 | static void viper_cpu_resume(void) |
| 145 | { |
| 146 | viper_icr_clear_bit(VIPER_ICR_R_DIS); |
| 147 | } |
| 148 | |
| 149 | static struct syscore_ops viper_cpu_syscore_ops = { |
| 150 | .suspend = viper_cpu_suspend, |
| 151 | .resume = viper_cpu_resume, |
| 152 | }; |
| 153 | |
| 154 | static unsigned int current_voltage_divisor; |
| 155 | |
| 156 | /* |
| 157 | * If force is not true then step from existing to new divisor. If |
| 158 | * force is true then jump straight to the new divisor. Stepping is |
| 159 | * used because if the jump in voltage is too large, the VCC can dip |
| 160 | * too low and the regulator cuts out. |
| 161 | * |
| 162 | * force can be used to initialize the divisor to a know state by |
| 163 | * setting the value for the current clock speed, since we are already |
| 164 | * running at that speed we know the voltage should be pretty close so |
| 165 | * the jump won't be too large |
| 166 | */ |
| 167 | static void viper_set_core_cpu_voltage(unsigned long khz, int force) |
| 168 | { |
| 169 | int i = 0; |
| 170 | unsigned int divisor = 0; |
| 171 | const char *v; |
| 172 | |
| 173 | if (khz < 200000) { |
| 174 | v = "1.0"; divisor = 0xfff; |
| 175 | } else if (khz < 300000) { |
| 176 | v = "1.1"; divisor = 0xde5; |
| 177 | } else { |
| 178 | v = "1.3"; divisor = 0x325; |
| 179 | } |
| 180 | |
| 181 | pr_debug("viper: setting CPU core voltage to %sV at %d.%03dMHz\n", |
| 182 | v, (int)khz / 1000, (int)khz % 1000); |
| 183 | |
| 184 | #define STEP 0x100 |
| 185 | do { |
| 186 | int step; |
| 187 | |
| 188 | if (force) |
| 189 | step = divisor; |
| 190 | else if (current_voltage_divisor < divisor - STEP) |
| 191 | step = current_voltage_divisor + STEP; |
| 192 | else if (current_voltage_divisor > divisor + STEP) |
| 193 | step = current_voltage_divisor - STEP; |
| 194 | else |
| 195 | step = divisor; |
| 196 | force = 0; |
| 197 | |
| 198 | gpio_set_value(VIPER_PSU_CLK_GPIO, 0); |
| 199 | gpio_set_value(VIPER_PSU_nCS_LD_GPIO, 0); |
| 200 | |
| 201 | for (i = 1 << 11 ; i > 0 ; i >>= 1) { |
| 202 | udelay(1); |
| 203 | |
| 204 | gpio_set_value(VIPER_PSU_DATA_GPIO, step & i); |
| 205 | udelay(1); |
| 206 | |
| 207 | gpio_set_value(VIPER_PSU_CLK_GPIO, 1); |
| 208 | udelay(1); |
| 209 | |
| 210 | gpio_set_value(VIPER_PSU_CLK_GPIO, 0); |
| 211 | } |
| 212 | udelay(1); |
| 213 | |
| 214 | gpio_set_value(VIPER_PSU_nCS_LD_GPIO, 1); |
| 215 | udelay(1); |
| 216 | |
| 217 | gpio_set_value(VIPER_PSU_nCS_LD_GPIO, 0); |
| 218 | |
| 219 | current_voltage_divisor = step; |
| 220 | } while (current_voltage_divisor != divisor); |
| 221 | } |
| 222 | |
| 223 | /* Interrupt handling */ |
| 224 | static unsigned long viper_irq_enabled_mask; |
| 225 | static const int viper_isa_irqs[] = { 3, 4, 5, 6, 7, 10, 11, 12, 9, 14, 15 }; |
| 226 | static const int viper_isa_irq_map[] = { |
| 227 | 0, /* ISA irq #0, invalid */ |
| 228 | 0, /* ISA irq #1, invalid */ |
| 229 | 0, /* ISA irq #2, invalid */ |
| 230 | 1 << 0, /* ISA irq #3 */ |
| 231 | 1 << 1, /* ISA irq #4 */ |
| 232 | 1 << 2, /* ISA irq #5 */ |
| 233 | 1 << 3, /* ISA irq #6 */ |
| 234 | 1 << 4, /* ISA irq #7 */ |
| 235 | 0, /* ISA irq #8, invalid */ |
| 236 | 1 << 8, /* ISA irq #9 */ |
| 237 | 1 << 5, /* ISA irq #10 */ |
| 238 | 1 << 6, /* ISA irq #11 */ |
| 239 | 1 << 7, /* ISA irq #12 */ |
| 240 | 0, /* ISA irq #13, invalid */ |
| 241 | 1 << 9, /* ISA irq #14 */ |
| 242 | 1 << 10, /* ISA irq #15 */ |
| 243 | }; |
| 244 | |
| 245 | static inline int viper_irq_to_bitmask(unsigned int irq) |
| 246 | { |
| 247 | return viper_isa_irq_map[irq - PXA_ISA_IRQ(0)]; |
| 248 | } |
| 249 | |
| 250 | static inline int viper_bit_to_irq(int bit) |
| 251 | { |
| 252 | return viper_isa_irqs[bit] + PXA_ISA_IRQ(0); |
| 253 | } |
| 254 | |
| 255 | static void viper_ack_irq(struct irq_data *d) |
| 256 | { |
| 257 | int viper_irq = viper_irq_to_bitmask(d->irq); |
| 258 | |
| 259 | if (viper_irq & 0xff) |
| 260 | VIPER_LO_IRQ_STATUS = viper_irq; |
| 261 | else |
| 262 | VIPER_HI_IRQ_STATUS = (viper_irq >> 8); |
| 263 | } |
| 264 | |
| 265 | static void viper_mask_irq(struct irq_data *d) |
| 266 | { |
| 267 | viper_irq_enabled_mask &= ~(viper_irq_to_bitmask(d->irq)); |
| 268 | } |
| 269 | |
| 270 | static void viper_unmask_irq(struct irq_data *d) |
| 271 | { |
| 272 | viper_irq_enabled_mask |= viper_irq_to_bitmask(d->irq); |
| 273 | } |
| 274 | |
| 275 | static inline unsigned long viper_irq_pending(void) |
| 276 | { |
| 277 | return (VIPER_HI_IRQ_STATUS << 8 | VIPER_LO_IRQ_STATUS) & |
| 278 | viper_irq_enabled_mask; |
| 279 | } |
| 280 | |
| 281 | static void viper_irq_handler(struct irq_desc *desc) |
| 282 | { |
| 283 | unsigned int irq; |
| 284 | unsigned long pending; |
| 285 | |
| 286 | pending = viper_irq_pending(); |
| 287 | do { |
| 288 | /* we're in a chained irq handler, |
| 289 | * so ack the interrupt by hand */ |
| 290 | desc->irq_data.chip->irq_ack(&desc->irq_data); |
| 291 | |
| 292 | if (likely(pending)) { |
| 293 | irq = viper_bit_to_irq(__ffs(pending)); |
| 294 | generic_handle_irq(irq); |
| 295 | } |
| 296 | pending = viper_irq_pending(); |
| 297 | } while (pending); |
| 298 | } |
| 299 | |
| 300 | static struct irq_chip viper_irq_chip = { |
| 301 | .name = "ISA", |
| 302 | .irq_ack = viper_ack_irq, |
| 303 | .irq_mask = viper_mask_irq, |
| 304 | .irq_unmask = viper_unmask_irq |
| 305 | }; |
| 306 | |
| 307 | static void __init viper_init_irq(void) |
| 308 | { |
| 309 | int level; |
| 310 | int isa_irq; |
| 311 | |
| 312 | pxa25x_init_irq(); |
| 313 | |
| 314 | /* setup ISA IRQs */ |
| 315 | for (level = 0; level < ARRAY_SIZE(viper_isa_irqs); level++) { |
| 316 | isa_irq = viper_bit_to_irq(level); |
| 317 | irq_set_chip_and_handler(isa_irq, &viper_irq_chip, |
| 318 | handle_edge_irq); |
| 319 | irq_clear_status_flags(isa_irq, IRQ_NOREQUEST | IRQ_NOPROBE); |
| 320 | } |
| 321 | |
| 322 | irq_set_chained_handler(gpio_to_irq(VIPER_CPLD_GPIO), |
| 323 | viper_irq_handler); |
| 324 | irq_set_irq_type(gpio_to_irq(VIPER_CPLD_GPIO), IRQ_TYPE_EDGE_BOTH); |
| 325 | } |
| 326 | |
| 327 | /* Flat Panel */ |
| 328 | static struct pxafb_mode_info fb_mode_info[] = { |
| 329 | { |
| 330 | .pixclock = 157500, |
| 331 | |
| 332 | .xres = 320, |
| 333 | .yres = 240, |
| 334 | |
| 335 | .bpp = 16, |
| 336 | |
| 337 | .hsync_len = 63, |
| 338 | .left_margin = 7, |
| 339 | .right_margin = 13, |
| 340 | |
| 341 | .vsync_len = 20, |
| 342 | .upper_margin = 0, |
| 343 | .lower_margin = 0, |
| 344 | |
| 345 | .sync = 0, |
| 346 | }, |
| 347 | }; |
| 348 | |
| 349 | static struct pxafb_mach_info fb_info = { |
| 350 | .modes = fb_mode_info, |
| 351 | .num_modes = 1, |
| 352 | .lcd_conn = LCD_COLOR_TFT_16BPP | LCD_PCLK_EDGE_FALL, |
| 353 | }; |
| 354 | |
| 355 | static struct pwm_lookup viper_pwm_lookup[] = { |
| 356 | PWM_LOOKUP("pxa25x-pwm.0", 0, "pwm-backlight.0", NULL, 1000000, |
| 357 | PWM_POLARITY_NORMAL), |
| 358 | }; |
| 359 | |
| 360 | static int viper_backlight_init(struct device *dev) |
| 361 | { |
| 362 | int ret; |
| 363 | |
| 364 | /* GPIO9 and 10 control FB backlight. Initialise to off */ |
| 365 | ret = gpio_request(VIPER_BCKLIGHT_EN_GPIO, "Backlight"); |
| 366 | if (ret) |
| 367 | goto err_request_bckl; |
| 368 | |
| 369 | ret = gpio_request(VIPER_LCD_EN_GPIO, "LCD"); |
| 370 | if (ret) |
| 371 | goto err_request_lcd; |
| 372 | |
| 373 | ret = gpio_direction_output(VIPER_BCKLIGHT_EN_GPIO, 0); |
| 374 | if (ret) |
| 375 | goto err_dir; |
| 376 | |
| 377 | ret = gpio_direction_output(VIPER_LCD_EN_GPIO, 0); |
| 378 | if (ret) |
| 379 | goto err_dir; |
| 380 | |
| 381 | return 0; |
| 382 | |
| 383 | err_dir: |
| 384 | gpio_free(VIPER_LCD_EN_GPIO); |
| 385 | err_request_lcd: |
| 386 | gpio_free(VIPER_BCKLIGHT_EN_GPIO); |
| 387 | err_request_bckl: |
| 388 | dev_err(dev, "Failed to setup LCD GPIOs\n"); |
| 389 | |
| 390 | return ret; |
| 391 | } |
| 392 | |
| 393 | static int viper_backlight_notify(struct device *dev, int brightness) |
| 394 | { |
| 395 | gpio_set_value(VIPER_LCD_EN_GPIO, !!brightness); |
| 396 | gpio_set_value(VIPER_BCKLIGHT_EN_GPIO, !!brightness); |
| 397 | |
| 398 | return brightness; |
| 399 | } |
| 400 | |
| 401 | static void viper_backlight_exit(struct device *dev) |
| 402 | { |
| 403 | gpio_free(VIPER_LCD_EN_GPIO); |
| 404 | gpio_free(VIPER_BCKLIGHT_EN_GPIO); |
| 405 | } |
| 406 | |
| 407 | static struct platform_pwm_backlight_data viper_backlight_data = { |
| 408 | .max_brightness = 100, |
| 409 | .dft_brightness = 100, |
| 410 | .enable_gpio = -1, |
| 411 | .init = viper_backlight_init, |
| 412 | .notify = viper_backlight_notify, |
| 413 | .exit = viper_backlight_exit, |
| 414 | }; |
| 415 | |
| 416 | static struct platform_device viper_backlight_device = { |
| 417 | .name = "pwm-backlight", |
| 418 | .dev = { |
| 419 | .parent = &pxa25x_device_pwm0.dev, |
| 420 | .platform_data = &viper_backlight_data, |
| 421 | }, |
| 422 | }; |
| 423 | |
| 424 | /* Ethernet */ |
| 425 | static struct resource smc91x_resources[] = { |
| 426 | [0] = { |
| 427 | .name = "smc91x-regs", |
| 428 | .start = VIPER_ETH_PHYS + 0x300, |
| 429 | .end = VIPER_ETH_PHYS + 0x30f, |
| 430 | .flags = IORESOURCE_MEM, |
| 431 | }, |
| 432 | [1] = { |
| 433 | .start = PXA_GPIO_TO_IRQ(VIPER_ETH_GPIO), |
| 434 | .end = PXA_GPIO_TO_IRQ(VIPER_ETH_GPIO), |
| 435 | .flags = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE, |
| 436 | }, |
| 437 | [2] = { |
| 438 | .name = "smc91x-data32", |
| 439 | .start = VIPER_ETH_DATA_PHYS, |
| 440 | .end = VIPER_ETH_DATA_PHYS + 3, |
| 441 | .flags = IORESOURCE_MEM, |
| 442 | }, |
| 443 | }; |
| 444 | |
| 445 | static struct smc91x_platdata viper_smc91x_info = { |
| 446 | .flags = SMC91X_USE_16BIT | SMC91X_NOWAIT, |
| 447 | .leda = RPC_LED_100_10, |
| 448 | .ledb = RPC_LED_TX_RX, |
| 449 | }; |
| 450 | |
| 451 | static struct platform_device smc91x_device = { |
| 452 | .name = "smc91x", |
| 453 | .id = -1, |
| 454 | .num_resources = ARRAY_SIZE(smc91x_resources), |
| 455 | .resource = smc91x_resources, |
| 456 | .dev = { |
| 457 | .platform_data = &viper_smc91x_info, |
| 458 | }, |
| 459 | }; |
| 460 | |
| 461 | /* i2c */ |
| 462 | static struct gpiod_lookup_table viper_i2c_gpiod_table = { |
| 463 | .dev_id = "i2c-gpio.1", |
| 464 | .table = { |
| 465 | GPIO_LOOKUP_IDX("gpio-pxa", VIPER_RTC_I2C_SDA_GPIO, |
| 466 | NULL, 0, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN), |
| 467 | GPIO_LOOKUP_IDX("gpio-pxa", VIPER_RTC_I2C_SCL_GPIO, |
| 468 | NULL, 1, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN), |
| 469 | }, |
| 470 | }; |
| 471 | |
| 472 | static struct i2c_gpio_platform_data i2c_bus_data = { |
| 473 | .udelay = 10, |
| 474 | .timeout = HZ, |
| 475 | }; |
| 476 | |
| 477 | static struct platform_device i2c_bus_device = { |
| 478 | .name = "i2c-gpio", |
| 479 | .id = 1, /* pxa2xx-i2c is bus 0, so start at 1 */ |
| 480 | .dev = { |
| 481 | .platform_data = &i2c_bus_data, |
| 482 | } |
| 483 | }; |
| 484 | |
| 485 | static struct i2c_board_info __initdata viper_i2c_devices[] = { |
| 486 | { |
| 487 | I2C_BOARD_INFO("ds1338", 0x68), |
| 488 | }, |
| 489 | }; |
| 490 | |
| 491 | /* |
| 492 | * Serial configuration: |
| 493 | * You can either have the standard PXA ports driven by the PXA driver, |
| 494 | * or all the ports (PXA + 16850) driven by the 8250 driver. |
| 495 | * Choose your poison. |
| 496 | */ |
| 497 | |
| 498 | static struct resource viper_serial_resources[] = { |
| 499 | #ifndef CONFIG_SERIAL_PXA |
| 500 | { |
| 501 | .start = 0x40100000, |
| 502 | .end = 0x4010001f, |
| 503 | .flags = IORESOURCE_MEM, |
| 504 | }, |
| 505 | { |
| 506 | .start = 0x40200000, |
| 507 | .end = 0x4020001f, |
| 508 | .flags = IORESOURCE_MEM, |
| 509 | }, |
| 510 | { |
| 511 | .start = 0x40700000, |
| 512 | .end = 0x4070001f, |
| 513 | .flags = IORESOURCE_MEM, |
| 514 | }, |
| 515 | { |
| 516 | .start = VIPER_UARTA_PHYS, |
| 517 | .end = VIPER_UARTA_PHYS + 0xf, |
| 518 | .flags = IORESOURCE_MEM, |
| 519 | }, |
| 520 | { |
| 521 | .start = VIPER_UARTB_PHYS, |
| 522 | .end = VIPER_UARTB_PHYS + 0xf, |
| 523 | .flags = IORESOURCE_MEM, |
| 524 | }, |
| 525 | #else |
| 526 | { |
| 527 | 0, |
| 528 | }, |
| 529 | #endif |
| 530 | }; |
| 531 | |
| 532 | static struct plat_serial8250_port serial_platform_data[] = { |
| 533 | #ifndef CONFIG_SERIAL_PXA |
| 534 | /* Internal UARTs */ |
| 535 | { |
| 536 | .membase = (void *)&FFUART, |
| 537 | .mapbase = __PREG(FFUART), |
| 538 | .irq = IRQ_FFUART, |
| 539 | .uartclk = 921600 * 16, |
| 540 | .regshift = 2, |
| 541 | .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST, |
| 542 | .iotype = UPIO_MEM, |
| 543 | }, |
| 544 | { |
| 545 | .membase = (void *)&BTUART, |
| 546 | .mapbase = __PREG(BTUART), |
| 547 | .irq = IRQ_BTUART, |
| 548 | .uartclk = 921600 * 16, |
| 549 | .regshift = 2, |
| 550 | .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST, |
| 551 | .iotype = UPIO_MEM, |
| 552 | }, |
| 553 | { |
| 554 | .membase = (void *)&STUART, |
| 555 | .mapbase = __PREG(STUART), |
| 556 | .irq = IRQ_STUART, |
| 557 | .uartclk = 921600 * 16, |
| 558 | .regshift = 2, |
| 559 | .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST, |
| 560 | .iotype = UPIO_MEM, |
| 561 | }, |
| 562 | /* External UARTs */ |
| 563 | { |
| 564 | .mapbase = VIPER_UARTA_PHYS, |
| 565 | .irq = PXA_GPIO_TO_IRQ(VIPER_UARTA_GPIO), |
| 566 | .irqflags = IRQF_TRIGGER_RISING, |
| 567 | .uartclk = 1843200, |
| 568 | .regshift = 1, |
| 569 | .iotype = UPIO_MEM, |
| 570 | .flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP | |
| 571 | UPF_SKIP_TEST, |
| 572 | }, |
| 573 | { |
| 574 | .mapbase = VIPER_UARTB_PHYS, |
| 575 | .irq = PXA_GPIO_TO_IRQ(VIPER_UARTB_GPIO), |
| 576 | .irqflags = IRQF_TRIGGER_RISING, |
| 577 | .uartclk = 1843200, |
| 578 | .regshift = 1, |
| 579 | .iotype = UPIO_MEM, |
| 580 | .flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP | |
| 581 | UPF_SKIP_TEST, |
| 582 | }, |
| 583 | #endif |
| 584 | { }, |
| 585 | }; |
| 586 | |
| 587 | static struct platform_device serial_device = { |
| 588 | .name = "serial8250", |
| 589 | .id = 0, |
| 590 | .dev = { |
| 591 | .platform_data = serial_platform_data, |
| 592 | }, |
| 593 | .num_resources = ARRAY_SIZE(viper_serial_resources), |
| 594 | .resource = viper_serial_resources, |
| 595 | }; |
| 596 | |
| 597 | /* USB */ |
| 598 | static void isp116x_delay(struct device *dev, int delay) |
| 599 | { |
| 600 | ndelay(delay); |
| 601 | } |
| 602 | |
| 603 | static struct resource isp116x_resources[] = { |
| 604 | [0] = { /* DATA */ |
| 605 | .start = VIPER_USB_PHYS + 0, |
| 606 | .end = VIPER_USB_PHYS + 1, |
| 607 | .flags = IORESOURCE_MEM, |
| 608 | }, |
| 609 | [1] = { /* ADDR */ |
| 610 | .start = VIPER_USB_PHYS + 2, |
| 611 | .end = VIPER_USB_PHYS + 3, |
| 612 | .flags = IORESOURCE_MEM, |
| 613 | }, |
| 614 | [2] = { |
| 615 | .start = PXA_GPIO_TO_IRQ(VIPER_USB_GPIO), |
| 616 | .end = PXA_GPIO_TO_IRQ(VIPER_USB_GPIO), |
| 617 | .flags = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE, |
| 618 | }, |
| 619 | }; |
| 620 | |
| 621 | /* (DataBusWidth16|AnalogOCEnable|DREQOutputPolarity|DownstreamPort15KRSel ) */ |
| 622 | static struct isp116x_platform_data isp116x_platform_data = { |
| 623 | /* Enable internal resistors on downstream ports */ |
| 624 | .sel15Kres = 1, |
| 625 | /* On-chip overcurrent protection */ |
| 626 | .oc_enable = 1, |
| 627 | /* INT output polarity */ |
| 628 | .int_act_high = 1, |
| 629 | /* INT edge or level triggered */ |
| 630 | .int_edge_triggered = 0, |
| 631 | |
| 632 | /* WAKEUP pin connected - NOT SUPPORTED */ |
| 633 | /* .remote_wakeup_connected = 0, */ |
| 634 | /* Wakeup by devices on usb bus enabled */ |
| 635 | .remote_wakeup_enable = 0, |
| 636 | .delay = isp116x_delay, |
| 637 | }; |
| 638 | |
| 639 | static struct platform_device isp116x_device = { |
| 640 | .name = "isp116x-hcd", |
| 641 | .id = -1, |
| 642 | .num_resources = ARRAY_SIZE(isp116x_resources), |
| 643 | .resource = isp116x_resources, |
| 644 | .dev = { |
| 645 | .platform_data = &isp116x_platform_data, |
| 646 | }, |
| 647 | |
| 648 | }; |
| 649 | |
| 650 | /* MTD */ |
| 651 | static struct resource mtd_resources[] = { |
| 652 | [0] = { /* RedBoot config + filesystem flash */ |
| 653 | .start = VIPER_FLASH_PHYS, |
| 654 | .end = VIPER_FLASH_PHYS + SZ_32M - 1, |
| 655 | .flags = IORESOURCE_MEM, |
| 656 | }, |
| 657 | [1] = { /* Boot flash */ |
| 658 | .start = VIPER_BOOT_PHYS, |
| 659 | .end = VIPER_BOOT_PHYS + SZ_1M - 1, |
| 660 | .flags = IORESOURCE_MEM, |
| 661 | }, |
| 662 | [2] = { /* |
| 663 | * SRAM size is actually 256KB, 8bits, with a sparse mapping |
| 664 | * (each byte is on a 16bit boundary). |
| 665 | */ |
| 666 | .start = _VIPER_SRAM_BASE, |
| 667 | .end = _VIPER_SRAM_BASE + SZ_512K - 1, |
| 668 | .flags = IORESOURCE_MEM, |
| 669 | }, |
| 670 | }; |
| 671 | |
| 672 | static struct mtd_partition viper_boot_flash_partition = { |
| 673 | .name = "RedBoot", |
| 674 | .size = SZ_1M, |
| 675 | .offset = 0, |
| 676 | .mask_flags = MTD_WRITEABLE, /* force R/O */ |
| 677 | }; |
| 678 | |
| 679 | static struct physmap_flash_data viper_flash_data[] = { |
| 680 | [0] = { |
| 681 | .width = 2, |
| 682 | .parts = NULL, |
| 683 | .nr_parts = 0, |
| 684 | }, |
| 685 | [1] = { |
| 686 | .width = 2, |
| 687 | .parts = &viper_boot_flash_partition, |
| 688 | .nr_parts = 1, |
| 689 | }, |
| 690 | }; |
| 691 | |
| 692 | static struct platform_device viper_mtd_devices[] = { |
| 693 | [0] = { |
| 694 | .name = "physmap-flash", |
| 695 | .id = 0, |
| 696 | .dev = { |
| 697 | .platform_data = &viper_flash_data[0], |
| 698 | }, |
| 699 | .resource = &mtd_resources[0], |
| 700 | .num_resources = 1, |
| 701 | }, |
| 702 | [1] = { |
| 703 | .name = "physmap-flash", |
| 704 | .id = 1, |
| 705 | .dev = { |
| 706 | .platform_data = &viper_flash_data[1], |
| 707 | }, |
| 708 | .resource = &mtd_resources[1], |
| 709 | .num_resources = 1, |
| 710 | }, |
| 711 | }; |
| 712 | |
| 713 | static struct platform_device *viper_devs[] __initdata = { |
| 714 | &smc91x_device, |
| 715 | &i2c_bus_device, |
| 716 | &serial_device, |
| 717 | &isp116x_device, |
| 718 | &viper_mtd_devices[0], |
| 719 | &viper_mtd_devices[1], |
| 720 | &viper_backlight_device, |
| 721 | &viper_pcmcia_device, |
| 722 | }; |
| 723 | |
| 724 | static mfp_cfg_t viper_pin_config[] __initdata = { |
| 725 | /* Chip selects */ |
| 726 | GPIO15_nCS_1, |
| 727 | GPIO78_nCS_2, |
| 728 | GPIO79_nCS_3, |
| 729 | GPIO80_nCS_4, |
| 730 | GPIO33_nCS_5, |
| 731 | |
| 732 | /* AC97 */ |
| 733 | GPIO28_AC97_BITCLK, |
| 734 | GPIO29_AC97_SDATA_IN_0, |
| 735 | GPIO30_AC97_SDATA_OUT, |
| 736 | GPIO31_AC97_SYNC, |
| 737 | |
| 738 | /* FP Backlight */ |
| 739 | GPIO9_GPIO, /* VIPER_BCKLIGHT_EN_GPIO */ |
| 740 | GPIO10_GPIO, /* VIPER_LCD_EN_GPIO */ |
| 741 | GPIO16_PWM0_OUT, |
| 742 | |
| 743 | /* Ethernet PHY Ready */ |
| 744 | GPIO18_RDY, |
| 745 | |
| 746 | /* Serial shutdown */ |
| 747 | GPIO12_GPIO | MFP_LPM_DRIVE_HIGH, /* VIPER_UART_SHDN_GPIO */ |
| 748 | |
| 749 | /* Compact-Flash / PC104 */ |
| 750 | GPIO48_nPOE, |
| 751 | GPIO49_nPWE, |
| 752 | GPIO50_nPIOR, |
| 753 | GPIO51_nPIOW, |
| 754 | GPIO52_nPCE_1, |
| 755 | GPIO53_nPCE_2, |
| 756 | GPIO54_nPSKTSEL, |
| 757 | GPIO55_nPREG, |
| 758 | GPIO56_nPWAIT, |
| 759 | GPIO57_nIOIS16, |
| 760 | GPIO8_GPIO, /* VIPER_CF_RDY_GPIO */ |
| 761 | GPIO32_GPIO, /* VIPER_CF_CD_GPIO */ |
| 762 | GPIO82_GPIO, /* VIPER_CF_POWER_GPIO */ |
| 763 | |
| 764 | /* Integrated UPS control */ |
| 765 | GPIO20_GPIO, /* VIPER_UPS_GPIO */ |
| 766 | |
| 767 | /* Vcc regulator control */ |
| 768 | GPIO6_GPIO, /* VIPER_PSU_DATA_GPIO */ |
| 769 | GPIO11_GPIO, /* VIPER_PSU_CLK_GPIO */ |
| 770 | GPIO19_GPIO, /* VIPER_PSU_nCS_LD_GPIO */ |
| 771 | |
| 772 | /* i2c busses */ |
| 773 | GPIO26_GPIO, /* VIPER_TPM_I2C_SDA_GPIO */ |
| 774 | GPIO27_GPIO, /* VIPER_TPM_I2C_SCL_GPIO */ |
| 775 | GPIO83_GPIO, /* VIPER_RTC_I2C_SDA_GPIO */ |
| 776 | GPIO84_GPIO, /* VIPER_RTC_I2C_SCL_GPIO */ |
| 777 | |
| 778 | /* PC/104 Interrupt */ |
| 779 | GPIO1_GPIO | WAKEUP_ON_EDGE_RISE, /* VIPER_CPLD_GPIO */ |
| 780 | }; |
| 781 | |
| 782 | static unsigned long viper_tpm; |
| 783 | |
| 784 | static int __init viper_tpm_setup(char *str) |
| 785 | { |
| 786 | return kstrtoul(str, 10, &viper_tpm) >= 0; |
| 787 | } |
| 788 | |
| 789 | __setup("tpm=", viper_tpm_setup); |
| 790 | |
| 791 | struct gpiod_lookup_table viper_tpm_i2c_gpiod_table = { |
| 792 | .dev_id = "i2c-gpio.2", |
| 793 | .table = { |
| 794 | GPIO_LOOKUP_IDX("gpio-pxa", VIPER_TPM_I2C_SDA_GPIO, |
| 795 | NULL, 0, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN), |
| 796 | GPIO_LOOKUP_IDX("gpio-pxa", VIPER_TPM_I2C_SCL_GPIO, |
| 797 | NULL, 1, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN), |
| 798 | }, |
| 799 | }; |
| 800 | |
| 801 | static void __init viper_tpm_init(void) |
| 802 | { |
| 803 | struct platform_device *tpm_device; |
| 804 | struct i2c_gpio_platform_data i2c_tpm_data = { |
| 805 | .udelay = 10, |
| 806 | .timeout = HZ, |
| 807 | }; |
| 808 | char *errstr; |
| 809 | |
| 810 | /* Allocate TPM i2c bus if requested */ |
| 811 | if (!viper_tpm) |
| 812 | return; |
| 813 | |
| 814 | gpiod_add_lookup_table(&viper_tpm_i2c_gpiod_table); |
| 815 | tpm_device = platform_device_alloc("i2c-gpio", 2); |
| 816 | if (tpm_device) { |
| 817 | if (!platform_device_add_data(tpm_device, |
| 818 | &i2c_tpm_data, |
| 819 | sizeof(i2c_tpm_data))) { |
| 820 | if (platform_device_add(tpm_device)) { |
| 821 | errstr = "register TPM i2c bus"; |
| 822 | goto error_free_tpm; |
| 823 | } |
| 824 | } else { |
| 825 | errstr = "allocate TPM i2c bus data"; |
| 826 | goto error_free_tpm; |
| 827 | } |
| 828 | } else { |
| 829 | errstr = "allocate TPM i2c device"; |
| 830 | goto error_tpm; |
| 831 | } |
| 832 | |
| 833 | return; |
| 834 | |
| 835 | error_free_tpm: |
| 836 | kfree(tpm_device); |
| 837 | error_tpm: |
| 838 | pr_err("viper: Couldn't %s, giving up\n", errstr); |
| 839 | } |
| 840 | |
| 841 | static void __init viper_init_vcore_gpios(void) |
| 842 | { |
| 843 | if (gpio_request(VIPER_PSU_DATA_GPIO, "PSU data")) |
| 844 | goto err_request_data; |
| 845 | |
| 846 | if (gpio_request(VIPER_PSU_CLK_GPIO, "PSU clock")) |
| 847 | goto err_request_clk; |
| 848 | |
| 849 | if (gpio_request(VIPER_PSU_nCS_LD_GPIO, "PSU cs")) |
| 850 | goto err_request_cs; |
| 851 | |
| 852 | if (gpio_direction_output(VIPER_PSU_DATA_GPIO, 0) || |
| 853 | gpio_direction_output(VIPER_PSU_CLK_GPIO, 0) || |
| 854 | gpio_direction_output(VIPER_PSU_nCS_LD_GPIO, 0)) |
| 855 | goto err_dir; |
| 856 | |
| 857 | /* c/should assume redboot set the correct level ??? */ |
| 858 | viper_set_core_cpu_voltage(get_clk_frequency_khz(0), 1); |
| 859 | |
| 860 | return; |
| 861 | |
| 862 | err_dir: |
| 863 | gpio_free(VIPER_PSU_nCS_LD_GPIO); |
| 864 | err_request_cs: |
| 865 | gpio_free(VIPER_PSU_CLK_GPIO); |
| 866 | err_request_clk: |
| 867 | gpio_free(VIPER_PSU_DATA_GPIO); |
| 868 | err_request_data: |
| 869 | pr_err("viper: Failed to setup vcore control GPIOs\n"); |
| 870 | } |
| 871 | |
| 872 | static void __init viper_init_serial_gpio(void) |
| 873 | { |
| 874 | if (gpio_request(VIPER_UART_SHDN_GPIO, "UARTs shutdown")) |
| 875 | goto err_request; |
| 876 | |
| 877 | if (gpio_direction_output(VIPER_UART_SHDN_GPIO, 0)) |
| 878 | goto err_dir; |
| 879 | |
| 880 | return; |
| 881 | |
| 882 | err_dir: |
| 883 | gpio_free(VIPER_UART_SHDN_GPIO); |
| 884 | err_request: |
| 885 | pr_err("viper: Failed to setup UART shutdown GPIO\n"); |
| 886 | } |
| 887 | |
| 888 | #ifdef CONFIG_CPU_FREQ |
| 889 | static int viper_cpufreq_notifier(struct notifier_block *nb, |
| 890 | unsigned long val, void *data) |
| 891 | { |
| 892 | struct cpufreq_freqs *freq = data; |
| 893 | |
| 894 | /* TODO: Adjust timings??? */ |
| 895 | |
| 896 | switch (val) { |
| 897 | case CPUFREQ_PRECHANGE: |
| 898 | if (freq->old < freq->new) { |
| 899 | /* we are getting faster so raise the voltage |
| 900 | * before we change freq */ |
| 901 | viper_set_core_cpu_voltage(freq->new, 0); |
| 902 | } |
| 903 | break; |
| 904 | case CPUFREQ_POSTCHANGE: |
| 905 | if (freq->old > freq->new) { |
| 906 | /* we are slowing down so drop the power |
| 907 | * after we change freq */ |
| 908 | viper_set_core_cpu_voltage(freq->new, 0); |
| 909 | } |
| 910 | break; |
| 911 | default: |
| 912 | /* ignore */ |
| 913 | break; |
| 914 | } |
| 915 | |
| 916 | return 0; |
| 917 | } |
| 918 | |
| 919 | static struct notifier_block viper_cpufreq_notifier_block = { |
| 920 | .notifier_call = viper_cpufreq_notifier |
| 921 | }; |
| 922 | |
| 923 | static void __init viper_init_cpufreq(void) |
| 924 | { |
| 925 | if (cpufreq_register_notifier(&viper_cpufreq_notifier_block, |
| 926 | CPUFREQ_TRANSITION_NOTIFIER)) |
| 927 | pr_err("viper: Failed to setup cpufreq notifier\n"); |
| 928 | } |
| 929 | #else |
| 930 | static inline void viper_init_cpufreq(void) {} |
| 931 | #endif |
| 932 | |
| 933 | static void viper_power_off(void) |
| 934 | { |
| 935 | pr_notice("Shutting off UPS\n"); |
| 936 | gpio_set_value(VIPER_UPS_GPIO, 1); |
| 937 | /* Spin to death... */ |
| 938 | while (1); |
| 939 | } |
| 940 | |
| 941 | static void __init viper_init(void) |
| 942 | { |
| 943 | u8 version; |
| 944 | |
| 945 | pm_power_off = viper_power_off; |
| 946 | |
| 947 | pxa2xx_mfp_config(ARRAY_AND_SIZE(viper_pin_config)); |
| 948 | |
| 949 | pxa_set_ffuart_info(NULL); |
| 950 | pxa_set_btuart_info(NULL); |
| 951 | pxa_set_stuart_info(NULL); |
| 952 | |
| 953 | /* Wake-up serial console */ |
| 954 | viper_init_serial_gpio(); |
| 955 | |
| 956 | pxa_set_fb_info(NULL, &fb_info); |
| 957 | |
| 958 | /* v1 hardware cannot use the datacs line */ |
| 959 | version = viper_hw_version(); |
| 960 | if (version == 0) |
| 961 | smc91x_device.num_resources--; |
| 962 | |
| 963 | pxa_set_i2c_info(NULL); |
| 964 | gpiod_add_lookup_table(&viper_i2c_gpiod_table); |
| 965 | pwm_add_table(viper_pwm_lookup, ARRAY_SIZE(viper_pwm_lookup)); |
| 966 | platform_add_devices(viper_devs, ARRAY_SIZE(viper_devs)); |
| 967 | |
| 968 | viper_init_vcore_gpios(); |
| 969 | viper_init_cpufreq(); |
| 970 | |
| 971 | register_syscore_ops(&viper_cpu_syscore_ops); |
| 972 | |
| 973 | if (version) { |
| 974 | pr_info("viper: hardware v%di%d detected. " |
| 975 | "CPLD revision %d.\n", |
| 976 | VIPER_BOARD_VERSION(version), |
| 977 | VIPER_BOARD_ISSUE(version), |
| 978 | VIPER_CPLD_REVISION(version)); |
| 979 | system_rev = (VIPER_BOARD_VERSION(version) << 8) | |
| 980 | (VIPER_BOARD_ISSUE(version) << 4) | |
| 981 | VIPER_CPLD_REVISION(version); |
| 982 | } else { |
| 983 | pr_info("viper: No version register.\n"); |
| 984 | } |
| 985 | |
| 986 | i2c_register_board_info(1, ARRAY_AND_SIZE(viper_i2c_devices)); |
| 987 | |
| 988 | viper_tpm_init(); |
| 989 | pxa_set_ac97_info(NULL); |
| 990 | } |
| 991 | |
| 992 | static struct map_desc viper_io_desc[] __initdata = { |
| 993 | { |
| 994 | .virtual = VIPER_CPLD_BASE, |
| 995 | .pfn = __phys_to_pfn(VIPER_CPLD_PHYS), |
| 996 | .length = 0x00300000, |
| 997 | .type = MT_DEVICE, |
| 998 | }, |
| 999 | { |
| 1000 | .virtual = VIPER_PC104IO_BASE, |
| 1001 | .pfn = __phys_to_pfn(0x30000000), |
| 1002 | .length = 0x00800000, |
| 1003 | .type = MT_DEVICE, |
| 1004 | }, |
| 1005 | }; |
| 1006 | |
| 1007 | static void __init viper_map_io(void) |
| 1008 | { |
| 1009 | pxa25x_map_io(); |
| 1010 | |
| 1011 | iotable_init(viper_io_desc, ARRAY_SIZE(viper_io_desc)); |
| 1012 | |
| 1013 | PCFR |= PCFR_OPDE; |
| 1014 | } |
| 1015 | |
| 1016 | MACHINE_START(VIPER, "Arcom/Eurotech VIPER SBC") |
| 1017 | /* Maintainer: Marc Zyngier <maz@misterjones.org> */ |
| 1018 | .atag_offset = 0x100, |
| 1019 | .map_io = viper_map_io, |
| 1020 | .nr_irqs = PXA_NR_IRQS, |
| 1021 | .init_irq = viper_init_irq, |
| 1022 | .handle_irq = pxa25x_handle_irq, |
| 1023 | .init_time = pxa_timer_init, |
| 1024 | .init_machine = viper_init, |
| 1025 | .restart = pxa_restart, |
| 1026 | MACHINE_END |