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