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Merge tag 'v3.3.7' into 3.3/master
[zen-stable.git] / arch / arm / mach-pxa / viper.c
blob023d6ca789de4f0126939b247a6972f4f1cb5498
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/i2c-gpio.h>
39 #include <linux/i2c/pxa-i2c.h>
40 #include <linux/serial_8250.h>
41 #include <linux/smc91x.h>
42 #include <linux/pwm_backlight.h>
43 #include <linux/usb/isp116x.h>
44 #include <linux/mtd/mtd.h>
45 #include <linux/mtd/partitions.h>
46 #include <linux/mtd/physmap.h>
47 #include <linux/syscore_ops.h>
48
49 #include <mach/pxa25x.h>
50 #include <mach/audio.h>
51 #include <mach/pxafb.h>
52 #include <mach/regs-uart.h>
53 #include <mach/arcom-pcmcia.h>
54 #include <mach/viper.h>
55
56 #include <asm/setup.h>
57 #include <asm/mach-types.h>
58 #include <asm/irq.h>
59 #include <asm/sizes.h>
60
61 #include <asm/mach/arch.h>
62 #include <asm/mach/map.h>
63 #include <asm/mach/irq.h>
64
65 #include "generic.h"
66 #include "devices.h"
67
68 static unsigned int icr;
69
70 static void viper_icr_set_bit(unsigned int bit)
71 {
72 icr |= bit;
73 VIPER_ICR = icr;
74 }
75
76 static void viper_icr_clear_bit(unsigned int bit)
77 {
78 icr &= ~bit;
79 VIPER_ICR = icr;
80 }
81
82 /* This function is used from the pcmcia module to reset the CF */
83 static void viper_cf_reset(int state)
84 {
85 if (state)
86 viper_icr_set_bit(VIPER_ICR_CF_RST);
87 else
88 viper_icr_clear_bit(VIPER_ICR_CF_RST);
89 }
90
91 static struct arcom_pcmcia_pdata viper_pcmcia_info = {
92 .cd_gpio = VIPER_CF_CD_GPIO,
93 .rdy_gpio = VIPER_CF_RDY_GPIO,
94 .pwr_gpio = VIPER_CF_POWER_GPIO,
95 .reset = viper_cf_reset,
96 };
97
98 static struct platform_device viper_pcmcia_device = {
99 .name = "viper-pcmcia",
100 .id = -1,
101 .dev = {
102 .platform_data = &viper_pcmcia_info,
103 },
104 };
105
106 /*
107 * The CPLD version register was not present on VIPER boards prior to
108 * v2i1. On v1 boards where the version register is not present we
109 * will just read back the previous value from the databus.
110 *
111 * Therefore we do two reads. The first time we write 0 to the
112 * (read-only) register before reading and the second time we write
113 * 0xff first. If the two reads do not match or they read back as 0xff
114 * or 0x00 then we have version 1 hardware.
115 */
116 static u8 viper_hw_version(void)
117 {
118 u8 v1, v2;
119 unsigned long flags;
120
121 local_irq_save(flags);
122
123 VIPER_VERSION = 0;
124 v1 = VIPER_VERSION;
125 VIPER_VERSION = 0xff;
126 v2 = VIPER_VERSION;
127
128 v1 = (v1 != v2 || v1 == 0xff) ? 0 : v1;
129
130 local_irq_restore(flags);
131 return v1;
132 }
133
134 /* CPU system core operations. */
135 static int viper_cpu_suspend(void)
136 {
137 viper_icr_set_bit(VIPER_ICR_R_DIS);
138 return 0;
139 }
140
141 static void viper_cpu_resume(void)
142 {
143 viper_icr_clear_bit(VIPER_ICR_R_DIS);
144 }
145
146 static struct syscore_ops viper_cpu_syscore_ops = {
147 .suspend = viper_cpu_suspend,
148 .resume = viper_cpu_resume,
149 };
150
151 static unsigned int current_voltage_divisor;
152
153 /*
154 * If force is not true then step from existing to new divisor. If
155 * force is true then jump straight to the new divisor. Stepping is
156 * used because if the jump in voltage is too large, the VCC can dip
157 * too low and the regulator cuts out.
158 *
159 * force can be used to initialize the divisor to a know state by
160 * setting the value for the current clock speed, since we are already
161 * running at that speed we know the voltage should be pretty close so
162 * the jump won't be too large
163 */
164 static void viper_set_core_cpu_voltage(unsigned long khz, int force)
165 {
166 int i = 0;
167 unsigned int divisor = 0;
168 const char *v;
169
170 if (khz < 200000) {
171 v = "1.0"; divisor = 0xfff;
172 } else if (khz < 300000) {
173 v = "1.1"; divisor = 0xde5;
174 } else {
175 v = "1.3"; divisor = 0x325;
176 }
177
178 pr_debug("viper: setting CPU core voltage to %sV at %d.%03dMHz\n",
179 v, (int)khz / 1000, (int)khz % 1000);
180
181 #define STEP 0x100
182 do {
183 int step;
184
185 if (force)
186 step = divisor;
187 else if (current_voltage_divisor < divisor - STEP)
188 step = current_voltage_divisor + STEP;
189 else if (current_voltage_divisor > divisor + STEP)
190 step = current_voltage_divisor - STEP;
191 else
192 step = divisor;
193 force = 0;
194
195 gpio_set_value(VIPER_PSU_CLK_GPIO, 0);
196 gpio_set_value(VIPER_PSU_nCS_LD_GPIO, 0);
197
198 for (i = 1 << 11 ; i > 0 ; i >>= 1) {
199 udelay(1);
200
201 gpio_set_value(VIPER_PSU_DATA_GPIO, step & i);
202 udelay(1);
203
204 gpio_set_value(VIPER_PSU_CLK_GPIO, 1);
205 udelay(1);
206
207 gpio_set_value(VIPER_PSU_CLK_GPIO, 0);
208 }
209 udelay(1);
210
211 gpio_set_value(VIPER_PSU_nCS_LD_GPIO, 1);
212 udelay(1);
213
214 gpio_set_value(VIPER_PSU_nCS_LD_GPIO, 0);
215
216 current_voltage_divisor = step;
217 } while (current_voltage_divisor != divisor);
218 }
219
220 /* Interrupt handling */
221 static unsigned long viper_irq_enabled_mask;
222 static const int viper_isa_irqs[] = { 3, 4, 5, 6, 7, 10, 11, 12, 9, 14, 15 };
223 static const int viper_isa_irq_map[] = {
224 0, /* ISA irq #0, invalid */
225 0, /* ISA irq #1, invalid */
226 0, /* ISA irq #2, invalid */
227 1 << 0, /* ISA irq #3 */
228 1 << 1, /* ISA irq #4 */
229 1 << 2, /* ISA irq #5 */
230 1 << 3, /* ISA irq #6 */
231 1 << 4, /* ISA irq #7 */
232 0, /* ISA irq #8, invalid */
233 1 << 8, /* ISA irq #9 */
234 1 << 5, /* ISA irq #10 */
235 1 << 6, /* ISA irq #11 */
236 1 << 7, /* ISA irq #12 */
237 0, /* ISA irq #13, invalid */
238 1 << 9, /* ISA irq #14 */
239 1 << 10, /* ISA irq #15 */
240 };
241
242 static inline int viper_irq_to_bitmask(unsigned int irq)
243 {
244 return viper_isa_irq_map[irq - PXA_ISA_IRQ(0)];
245 }
246
247 static inline int viper_bit_to_irq(int bit)
248 {
249 return viper_isa_irqs[bit] + PXA_ISA_IRQ(0);
250 }
251
252 static void viper_ack_irq(struct irq_data *d)
253 {
254 int viper_irq = viper_irq_to_bitmask(d->irq);
255
256 if (viper_irq & 0xff)
257 VIPER_LO_IRQ_STATUS = viper_irq;
258 else
259 VIPER_HI_IRQ_STATUS = (viper_irq >> 8);
260 }
261
262 static void viper_mask_irq(struct irq_data *d)
263 {
264 viper_irq_enabled_mask &= ~(viper_irq_to_bitmask(d->irq));
265 }
266
267 static void viper_unmask_irq(struct irq_data *d)
268 {
269 viper_irq_enabled_mask |= viper_irq_to_bitmask(d->irq);
270 }
271
272 static inline unsigned long viper_irq_pending(void)
273 {
274 return (VIPER_HI_IRQ_STATUS << 8 | VIPER_LO_IRQ_STATUS) &
275 viper_irq_enabled_mask;
276 }
277
278 static void viper_irq_handler(unsigned int irq, struct irq_desc *desc)
279 {
280 unsigned long pending;
281
282 pending = viper_irq_pending();
283 do {
284 /* we're in a chained irq handler,
285 * so ack the interrupt by hand */
286 desc->irq_data.chip->irq_ack(&desc->irq_data);
287
288 if (likely(pending)) {
289 irq = viper_bit_to_irq(__ffs(pending));
290 generic_handle_irq(irq);
291 }
292 pending = viper_irq_pending();
293 } while (pending);
294 }
295
296 static struct irq_chip viper_irq_chip = {
297 .name = "ISA",
298 .irq_ack = viper_ack_irq,
299 .irq_mask = viper_mask_irq,
300 .irq_unmask = viper_unmask_irq
301 };
302
303 static void __init viper_init_irq(void)
304 {
305 int level;
306 int isa_irq;
307
308 pxa25x_init_irq();
309
310 /* setup ISA IRQs */
311 for (level = 0; level < ARRAY_SIZE(viper_isa_irqs); level++) {
312 isa_irq = viper_bit_to_irq(level);
313 irq_set_chip_and_handler(isa_irq, &viper_irq_chip,
314 handle_edge_irq);
315 set_irq_flags(isa_irq, IRQF_VALID | IRQF_PROBE);
316 }
317
318 irq_set_chained_handler(gpio_to_irq(VIPER_CPLD_GPIO),
319 viper_irq_handler);
320 irq_set_irq_type(gpio_to_irq(VIPER_CPLD_GPIO), IRQ_TYPE_EDGE_BOTH);
321 }
322
323 /* Flat Panel */
324 static struct pxafb_mode_info fb_mode_info[] = {
325 {
326 .pixclock = 157500,
327
328 .xres = 320,
329 .yres = 240,
330
331 .bpp = 16,
332
333 .hsync_len = 63,
334 .left_margin = 7,
335 .right_margin = 13,
336
337 .vsync_len = 20,
338 .upper_margin = 0,
339 .lower_margin = 0,
340
341 .sync = 0,
342 },
343 };
344
345 static struct pxafb_mach_info fb_info = {
346 .modes = fb_mode_info,
347 .num_modes = 1,
348 .lcd_conn = LCD_COLOR_TFT_16BPP | LCD_PCLK_EDGE_FALL,
349 };
350
351 static int viper_backlight_init(struct device *dev)
352 {
353 int ret;
354
355 /* GPIO9 and 10 control FB backlight. Initialise to off */
356 ret = gpio_request(VIPER_BCKLIGHT_EN_GPIO, "Backlight");
357 if (ret)
358 goto err_request_bckl;
359
360 ret = gpio_request(VIPER_LCD_EN_GPIO, "LCD");
361 if (ret)
362 goto err_request_lcd;
363
364 ret = gpio_direction_output(VIPER_BCKLIGHT_EN_GPIO, 0);
365 if (ret)
366 goto err_dir;
367
368 ret = gpio_direction_output(VIPER_LCD_EN_GPIO, 0);
369 if (ret)
370 goto err_dir;
371
372 return 0;
373
374 err_dir:
375 gpio_free(VIPER_LCD_EN_GPIO);
376 err_request_lcd:
377 gpio_free(VIPER_BCKLIGHT_EN_GPIO);
378 err_request_bckl:
379 dev_err(dev, "Failed to setup LCD GPIOs\n");
380
381 return ret;
382 }
383
384 static int viper_backlight_notify(struct device *dev, int brightness)
385 {
386 gpio_set_value(VIPER_LCD_EN_GPIO, !!brightness);
387 gpio_set_value(VIPER_BCKLIGHT_EN_GPIO, !!brightness);
388
389 return brightness;
390 }
391
392 static void viper_backlight_exit(struct device *dev)
393 {
394 gpio_free(VIPER_LCD_EN_GPIO);
395 gpio_free(VIPER_BCKLIGHT_EN_GPIO);
396 }
397
398 static struct platform_pwm_backlight_data viper_backlight_data = {
399 .pwm_id = 0,
400 .max_brightness = 100,
401 .dft_brightness = 100,
402 .pwm_period_ns = 1000000,
403 .init = viper_backlight_init,
404 .notify = viper_backlight_notify,
405 .exit = viper_backlight_exit,
406 };
407
408 static struct platform_device viper_backlight_device = {
409 .name = "pwm-backlight",
410 .dev = {
411 .parent = &pxa25x_device_pwm0.dev,
412 .platform_data = &viper_backlight_data,
413 },
414 };
415
416 /* Ethernet */
417 static struct resource smc91x_resources[] = {
418 [0] = {
419 .name = "smc91x-regs",
420 .start = VIPER_ETH_PHYS + 0x300,
421 .end = VIPER_ETH_PHYS + 0x30f,
422 .flags = IORESOURCE_MEM,
423 },
424 [1] = {
425 .start = PXA_GPIO_TO_IRQ(VIPER_ETH_GPIO),
426 .end = PXA_GPIO_TO_IRQ(VIPER_ETH_GPIO),
427 .flags = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
428 },
429 [2] = {
430 .name = "smc91x-data32",
431 .start = VIPER_ETH_DATA_PHYS,
432 .end = VIPER_ETH_DATA_PHYS + 3,
433 .flags = IORESOURCE_MEM,
434 },
435 };
436
437 static struct smc91x_platdata viper_smc91x_info = {
438 .flags = SMC91X_USE_16BIT | SMC91X_NOWAIT,
439 .leda = RPC_LED_100_10,
440 .ledb = RPC_LED_TX_RX,
441 };
442
443 static struct platform_device smc91x_device = {
444 .name = "smc91x",
445 .id = -1,
446 .num_resources = ARRAY_SIZE(smc91x_resources),
447 .resource = smc91x_resources,
448 .dev = {
449 .platform_data = &viper_smc91x_info,
450 },
451 };
452
453 /* i2c */
454 static struct i2c_gpio_platform_data i2c_bus_data = {
455 .sda_pin = VIPER_RTC_I2C_SDA_GPIO,
456 .scl_pin = VIPER_RTC_I2C_SCL_GPIO,
457 .udelay = 10,
458 .timeout = HZ,
459 };
460
461 static struct platform_device i2c_bus_device = {
462 .name = "i2c-gpio",
463 .id = 1, /* pxa2xx-i2c is bus 0, so start at 1 */
464 .dev = {
465 .platform_data = &i2c_bus_data,
466 }
467 };
468
469 static struct i2c_board_info __initdata viper_i2c_devices[] = {
470 {
471 I2C_BOARD_INFO("ds1338", 0x68),
472 },
473 };
474
475 /*
476 * Serial configuration:
477 * You can either have the standard PXA ports driven by the PXA driver,
478 * or all the ports (PXA + 16850) driven by the 8250 driver.
479 * Choose your poison.
480 */
481
482 static struct resource viper_serial_resources[] = {
483 #ifndef CONFIG_SERIAL_PXA
484 {
485 .start = 0x40100000,
486 .end = 0x4010001f,
487 .flags = IORESOURCE_MEM,
488 },
489 {
490 .start = 0x40200000,
491 .end = 0x4020001f,
492 .flags = IORESOURCE_MEM,
493 },
494 {
495 .start = 0x40700000,
496 .end = 0x4070001f,
497 .flags = IORESOURCE_MEM,
498 },
499 {
500 .start = VIPER_UARTA_PHYS,
501 .end = VIPER_UARTA_PHYS + 0xf,
502 .flags = IORESOURCE_MEM,
503 },
504 {
505 .start = VIPER_UARTB_PHYS,
506 .end = VIPER_UARTB_PHYS + 0xf,
507 .flags = IORESOURCE_MEM,
508 },
509 #else
510 {
511 0,
512 },
513 #endif
514 };
515
516 static struct plat_serial8250_port serial_platform_data[] = {
517 #ifndef CONFIG_SERIAL_PXA
518 /* Internal UARTs */
519 {
520 .membase = (void *)&FFUART,
521 .mapbase = __PREG(FFUART),
522 .irq = IRQ_FFUART,
523 .uartclk = 921600 * 16,
524 .regshift = 2,
525 .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
526 .iotype = UPIO_MEM,
527 },
528 {
529 .membase = (void *)&BTUART,
530 .mapbase = __PREG(BTUART),
531 .irq = IRQ_BTUART,
532 .uartclk = 921600 * 16,
533 .regshift = 2,
534 .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
535 .iotype = UPIO_MEM,
536 },
537 {
538 .membase = (void *)&STUART,
539 .mapbase = __PREG(STUART),
540 .irq = IRQ_STUART,
541 .uartclk = 921600 * 16,
542 .regshift = 2,
543 .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
544 .iotype = UPIO_MEM,
545 },
546 /* External UARTs */
547 {
548 .mapbase = VIPER_UARTA_PHYS,
549 .irq = PXA_GPIO_TO_IRQ(VIPER_UARTA_GPIO),
550 .irqflags = IRQF_TRIGGER_RISING,
551 .uartclk = 1843200,
552 .regshift = 1,
553 .iotype = UPIO_MEM,
554 .flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP |
555 UPF_SKIP_TEST,
556 },
557 {
558 .mapbase = VIPER_UARTB_PHYS,
559 .irq = PXA_GPIO_TO_IRQ(VIPER_UARTB_GPIO),
560 .irqflags = IRQF_TRIGGER_RISING,
561 .uartclk = 1843200,
562 .regshift = 1,
563 .iotype = UPIO_MEM,
564 .flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP |
565 UPF_SKIP_TEST,
566 },
567 #endif
568 { },
569 };
570
571 static struct platform_device serial_device = {
572 .name = "serial8250",
573 .id = 0,
574 .dev = {
575 .platform_data = serial_platform_data,
576 },
577 .num_resources = ARRAY_SIZE(viper_serial_resources),
578 .resource = viper_serial_resources,
579 };
580
581 /* USB */
582 static void isp116x_delay(struct device *dev, int delay)
583 {
584 ndelay(delay);
585 }
586
587 static struct resource isp116x_resources[] = {
588 [0] = { /* DATA */
589 .start = VIPER_USB_PHYS + 0,
590 .end = VIPER_USB_PHYS + 1,
591 .flags = IORESOURCE_MEM,
592 },
593 [1] = { /* ADDR */
594 .start = VIPER_USB_PHYS + 2,
595 .end = VIPER_USB_PHYS + 3,
596 .flags = IORESOURCE_MEM,
597 },
598 [2] = {
599 .start = PXA_GPIO_TO_IRQ(VIPER_USB_GPIO),
600 .end = PXA_GPIO_TO_IRQ(VIPER_USB_GPIO),
601 .flags = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
602 },
603 };
604
605 /* (DataBusWidth16|AnalogOCEnable|DREQOutputPolarity|DownstreamPort15KRSel ) */
606 static struct isp116x_platform_data isp116x_platform_data = {
607 /* Enable internal resistors on downstream ports */
608 .sel15Kres = 1,
609 /* On-chip overcurrent protection */
610 .oc_enable = 1,
611 /* INT output polarity */
612 .int_act_high = 1,
613 /* INT edge or level triggered */
614 .int_edge_triggered = 0,
615
616 /* WAKEUP pin connected - NOT SUPPORTED */
617 /* .remote_wakeup_connected = 0, */
618 /* Wakeup by devices on usb bus enabled */
619 .remote_wakeup_enable = 0,
620 .delay = isp116x_delay,
621 };
622
623 static struct platform_device isp116x_device = {
624 .name = "isp116x-hcd",
625 .id = -1,
626 .num_resources = ARRAY_SIZE(isp116x_resources),
627 .resource = isp116x_resources,
628 .dev = {
629 .platform_data = &isp116x_platform_data,
630 },
631
632 };
633
634 /* MTD */
635 static struct resource mtd_resources[] = {
636 [0] = { /* RedBoot config + filesystem flash */
637 .start = VIPER_FLASH_PHYS,
638 .end = VIPER_FLASH_PHYS + SZ_32M - 1,
639 .flags = IORESOURCE_MEM,
640 },
641 [1] = { /* Boot flash */
642 .start = VIPER_BOOT_PHYS,
643 .end = VIPER_BOOT_PHYS + SZ_1M - 1,
644 .flags = IORESOURCE_MEM,
645 },
646 [2] = { /*
647 * SRAM size is actually 256KB, 8bits, with a sparse mapping
648 * (each byte is on a 16bit boundary).
649 */
650 .start = _VIPER_SRAM_BASE,
651 .end = _VIPER_SRAM_BASE + SZ_512K - 1,
652 .flags = IORESOURCE_MEM,
653 },
654 };
655
656 static struct mtd_partition viper_boot_flash_partition = {
657 .name = "RedBoot",
658 .size = SZ_1M,
659 .offset = 0,
660 .mask_flags = MTD_WRITEABLE, /* force R/O */
661 };
662
663 static struct physmap_flash_data viper_flash_data[] = {
664 [0] = {
665 .width = 2,
666 .parts = NULL,
667 .nr_parts = 0,
668 },
669 [1] = {
670 .width = 2,
671 .parts = &viper_boot_flash_partition,
672 .nr_parts = 1,
673 },
674 };
675
676 static struct platform_device viper_mtd_devices[] = {
677 [0] = {
678 .name = "physmap-flash",
679 .id = 0,
680 .dev = {
681 .platform_data = &viper_flash_data[0],
682 },
683 .resource = &mtd_resources[0],
684 .num_resources = 1,
685 },
686 [1] = {
687 .name = "physmap-flash",
688 .id = 1,
689 .dev = {
690 .platform_data = &viper_flash_data[1],
691 },
692 .resource = &mtd_resources[1],
693 .num_resources = 1,
694 },
695 };
696
697 static struct platform_device *viper_devs[] __initdata = {
698 &smc91x_device,
699 &i2c_bus_device,
700 &serial_device,
701 &isp116x_device,
702 &viper_mtd_devices[0],
703 &viper_mtd_devices[1],
704 &viper_backlight_device,
705 &viper_pcmcia_device,
706 };
707
708 static mfp_cfg_t viper_pin_config[] __initdata = {
709 /* Chip selects */
710 GPIO15_nCS_1,
711 GPIO78_nCS_2,
712 GPIO79_nCS_3,
713 GPIO80_nCS_4,
714 GPIO33_nCS_5,
715
716 /* AC97 */
717 GPIO28_AC97_BITCLK,
718 GPIO29_AC97_SDATA_IN_0,
719 GPIO30_AC97_SDATA_OUT,
720 GPIO31_AC97_SYNC,
721
722 /* FP Backlight */
723 GPIO9_GPIO, /* VIPER_BCKLIGHT_EN_GPIO */
724 GPIO10_GPIO, /* VIPER_LCD_EN_GPIO */
725 GPIO16_PWM0_OUT,
726
727 /* Ethernet PHY Ready */
728 GPIO18_RDY,
729
730 /* Serial shutdown */
731 GPIO12_GPIO | MFP_LPM_DRIVE_HIGH, /* VIPER_UART_SHDN_GPIO */
732
733 /* Compact-Flash / PC104 */
734 GPIO48_nPOE,
735 GPIO49_nPWE,
736 GPIO50_nPIOR,
737 GPIO51_nPIOW,
738 GPIO52_nPCE_1,
739 GPIO53_nPCE_2,
740 GPIO54_nPSKTSEL,
741 GPIO55_nPREG,
742 GPIO56_nPWAIT,
743 GPIO57_nIOIS16,
744 GPIO8_GPIO, /* VIPER_CF_RDY_GPIO */
745 GPIO32_GPIO, /* VIPER_CF_CD_GPIO */
746 GPIO82_GPIO, /* VIPER_CF_POWER_GPIO */
747
748 /* Integrated UPS control */
749 GPIO20_GPIO, /* VIPER_UPS_GPIO */
750
751 /* Vcc regulator control */
752 GPIO6_GPIO, /* VIPER_PSU_DATA_GPIO */
753 GPIO11_GPIO, /* VIPER_PSU_CLK_GPIO */
754 GPIO19_GPIO, /* VIPER_PSU_nCS_LD_GPIO */
755
756 /* i2c busses */
757 GPIO26_GPIO, /* VIPER_TPM_I2C_SDA_GPIO */
758 GPIO27_GPIO, /* VIPER_TPM_I2C_SCL_GPIO */
759 GPIO83_GPIO, /* VIPER_RTC_I2C_SDA_GPIO */
760 GPIO84_GPIO, /* VIPER_RTC_I2C_SCL_GPIO */
761
762 /* PC/104 Interrupt */
763 GPIO1_GPIO | WAKEUP_ON_EDGE_RISE, /* VIPER_CPLD_GPIO */
764 };
765
766 static unsigned long viper_tpm;
767
768 static int __init viper_tpm_setup(char *str)
769 {
770 strict_strtoul(str, 10, &viper_tpm);
771 return 1;
772 }
773
774 __setup("tpm=", viper_tpm_setup);
775
776 static void __init viper_tpm_init(void)
777 {
778 struct platform_device *tpm_device;
779 struct i2c_gpio_platform_data i2c_tpm_data = {
780 .sda_pin = VIPER_TPM_I2C_SDA_GPIO,
781 .scl_pin = VIPER_TPM_I2C_SCL_GPIO,
782 .udelay = 10,
783 .timeout = HZ,
784 };
785 char *errstr;
786
787 /* Allocate TPM i2c bus if requested */
788 if (!viper_tpm)
789 return;
790
791 tpm_device = platform_device_alloc("i2c-gpio", 2);
792 if (tpm_device) {
793 if (!platform_device_add_data(tpm_device,
794 &i2c_tpm_data,
795 sizeof(i2c_tpm_data))) {
796 if (platform_device_add(tpm_device)) {
797 errstr = "register TPM i2c bus";
798 goto error_free_tpm;
799 }
800 } else {
801 errstr = "allocate TPM i2c bus data";
802 goto error_free_tpm;
803 }
804 } else {
805 errstr = "allocate TPM i2c device";
806 goto error_tpm;
807 }
808
809 return;
810
811 error_free_tpm:
812 kfree(tpm_device);
813 error_tpm:
814 pr_err("viper: Couldn't %s, giving up\n", errstr);
815 }
816
817 static void __init viper_init_vcore_gpios(void)
818 {
819 if (gpio_request(VIPER_PSU_DATA_GPIO, "PSU data"))
820 goto err_request_data;
821
822 if (gpio_request(VIPER_PSU_CLK_GPIO, "PSU clock"))
823 goto err_request_clk;
824
825 if (gpio_request(VIPER_PSU_nCS_LD_GPIO, "PSU cs"))
826 goto err_request_cs;
827
828 if (gpio_direction_output(VIPER_PSU_DATA_GPIO, 0) ||
829 gpio_direction_output(VIPER_PSU_CLK_GPIO, 0) ||
830 gpio_direction_output(VIPER_PSU_nCS_LD_GPIO, 0))
831 goto err_dir;
832
833 /* c/should assume redboot set the correct level ??? */
834 viper_set_core_cpu_voltage(get_clk_frequency_khz(0), 1);
835
836 return;
837
838 err_dir:
839 gpio_free(VIPER_PSU_nCS_LD_GPIO);
840 err_request_cs:
841 gpio_free(VIPER_PSU_CLK_GPIO);
842 err_request_clk:
843 gpio_free(VIPER_PSU_DATA_GPIO);
844 err_request_data:
845 pr_err("viper: Failed to setup vcore control GPIOs\n");
846 }
847
848 static void __init viper_init_serial_gpio(void)
849 {
850 if (gpio_request(VIPER_UART_SHDN_GPIO, "UARTs shutdown"))
851 goto err_request;
852
853 if (gpio_direction_output(VIPER_UART_SHDN_GPIO, 0))
854 goto err_dir;
855
856 return;
857
858 err_dir:
859 gpio_free(VIPER_UART_SHDN_GPIO);
860 err_request:
861 pr_err("viper: Failed to setup UART shutdown GPIO\n");
862 }
863
864 #ifdef CONFIG_CPU_FREQ
865 static int viper_cpufreq_notifier(struct notifier_block *nb,
866 unsigned long val, void *data)
867 {
868 struct cpufreq_freqs *freq = data;
869
870 /* TODO: Adjust timings??? */
871
872 switch (val) {
873 case CPUFREQ_PRECHANGE:
874 if (freq->old < freq->new) {
875 /* we are getting faster so raise the voltage
876 * before we change freq */
877 viper_set_core_cpu_voltage(freq->new, 0);
878 }
879 break;
880 case CPUFREQ_POSTCHANGE:
881 if (freq->old > freq->new) {
882 /* we are slowing down so drop the power
883 * after we change freq */
884 viper_set_core_cpu_voltage(freq->new, 0);
885 }
886 break;
887 case CPUFREQ_RESUMECHANGE:
888 viper_set_core_cpu_voltage(freq->new, 0);
889 break;
890 default:
891 /* ignore */
892 break;
893 }
894
895 return 0;
896 }
897
898 static struct notifier_block viper_cpufreq_notifier_block = {
899 .notifier_call = viper_cpufreq_notifier
900 };
901
902 static void __init viper_init_cpufreq(void)
903 {
904 if (cpufreq_register_notifier(&viper_cpufreq_notifier_block,
905 CPUFREQ_TRANSITION_NOTIFIER))
906 pr_err("viper: Failed to setup cpufreq notifier\n");
907 }
908 #else
909 static inline void viper_init_cpufreq(void) {}
910 #endif
911
912 static void viper_power_off(void)
913 {
914 pr_notice("Shutting off UPS\n");
915 gpio_set_value(VIPER_UPS_GPIO, 1);
916 /* Spin to death... */
917 while (1);
918 }
919
920 static void __init viper_init(void)
921 {
922 u8 version;
923
924 pm_power_off = viper_power_off;
925
926 pxa2xx_mfp_config(ARRAY_AND_SIZE(viper_pin_config));
927
928 pxa_set_ffuart_info(NULL);
929 pxa_set_btuart_info(NULL);
930 pxa_set_stuart_info(NULL);
931
932 /* Wake-up serial console */
933 viper_init_serial_gpio();
934
935 pxa_set_fb_info(NULL, &fb_info);
936
937 /* v1 hardware cannot use the datacs line */
938 version = viper_hw_version();
939 if (version == 0)
940 smc91x_device.num_resources--;
941
942 pxa_set_i2c_info(NULL);
943 platform_add_devices(viper_devs, ARRAY_SIZE(viper_devs));
944
945 viper_init_vcore_gpios();
946 viper_init_cpufreq();
947
948 register_syscore_ops(&viper_cpu_syscore_ops);
949
950 if (version) {
951 pr_info("viper: hardware v%di%d detected. "
952 "CPLD revision %d.\n",
953 VIPER_BOARD_VERSION(version),
954 VIPER_BOARD_ISSUE(version),
955 VIPER_CPLD_REVISION(version));
956 system_rev = (VIPER_BOARD_VERSION(version) << 8) |
957 (VIPER_BOARD_ISSUE(version) << 4) |
958 VIPER_CPLD_REVISION(version);
959 } else {
960 pr_info("viper: No version register.\n");
961 }
962
963 i2c_register_board_info(1, ARRAY_AND_SIZE(viper_i2c_devices));
964
965 viper_tpm_init();
966 pxa_set_ac97_info(NULL);
967 }
968
969 static struct map_desc viper_io_desc[] __initdata = {
970 {
971 .virtual = VIPER_CPLD_BASE,
972 .pfn = __phys_to_pfn(VIPER_CPLD_PHYS),
973 .length = 0x00300000,
974 .type = MT_DEVICE,
975 },
976 {
977 .virtual = VIPER_PC104IO_BASE,
978 .pfn = __phys_to_pfn(0x30000000),
979 .length = 0x00800000,
980 .type = MT_DEVICE,
981 },
982 };
983
984 static void __init viper_map_io(void)
985 {
986 pxa25x_map_io();
987
988 iotable_init(viper_io_desc, ARRAY_SIZE(viper_io_desc));
989
990 PCFR |= PCFR_OPDE;
991 }
992
993 MACHINE_START(VIPER, "Arcom/Eurotech VIPER SBC")
994 /* Maintainer: Marc Zyngier <maz@misterjones.org> */
995 .atag_offset = 0x100,
996 .map_io = viper_map_io,
997 .init_irq = viper_init_irq,
998 .handle_irq = pxa25x_handle_irq,
999 .timer = &pxa_timer,
1000 .init_machine = viper_init,
1001 .restart = pxa_restart,
1002 MACHINE_END