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