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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 <linux/platform_data/video-pxafb.h>
52#include <mach/regs-uart.h>
53#include <linux/platform_data/pcmcia-pxa2xx_viper.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
69static unsigned int icr;
70
71static void viper_icr_set_bit(unsigned int bit)
72{
73 icr |= bit;
74 VIPER_ICR = icr;
75}
76
77static 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 */
84static 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
92static 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
99static 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 */
117static 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. */
136static int viper_cpu_suspend(void)
137{
138 viper_icr_set_bit(VIPER_ICR_R_DIS);
139 return 0;
140}
141
142static void viper_cpu_resume(void)
143{
144 viper_icr_clear_bit(VIPER_ICR_R_DIS);
145}
146
147static struct syscore_ops viper_cpu_syscore_ops = {
148 .suspend = viper_cpu_suspend,
149 .resume = viper_cpu_resume,
150};
151
152static 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 */
165static 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 */
222static unsigned long viper_irq_enabled_mask;
223static const int viper_isa_irqs[] = { 3, 4, 5, 6, 7, 10, 11, 12, 9, 14, 15 };
224static 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
243static inline int viper_irq_to_bitmask(unsigned int irq)
244{
245 return viper_isa_irq_map[irq - PXA_ISA_IRQ(0)];
246}
247
248static inline int viper_bit_to_irq(int bit)
249{
250 return viper_isa_irqs[bit] + PXA_ISA_IRQ(0);
251}
252
253static 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
263static void viper_mask_irq(struct irq_data *d)
264{
265 viper_irq_enabled_mask &= ~(viper_irq_to_bitmask(d->irq));
266}
267
268static void viper_unmask_irq(struct irq_data *d)
269{
270 viper_irq_enabled_mask |= viper_irq_to_bitmask(d->irq);
271}
272
273static 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
279static 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
297static 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
304static 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 */
325static 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
346static 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
352static 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
375err_dir:
376 gpio_free(VIPER_LCD_EN_GPIO);
377err_request_lcd:
378 gpio_free(VIPER_BCKLIGHT_EN_GPIO);
379err_request_bckl:
380 dev_err(dev, "Failed to setup LCD GPIOs\n");
381
382 return ret;
383}
384
385static 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
393static void viper_backlight_exit(struct device *dev)
394{
395 gpio_free(VIPER_LCD_EN_GPIO);
396 gpio_free(VIPER_BCKLIGHT_EN_GPIO);
397}
398
399static 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 .enable_gpio = -1,
405 .init = viper_backlight_init,
406 .notify = viper_backlight_notify,
407 .exit = viper_backlight_exit,
408};
409
410static struct platform_device viper_backlight_device = {
411 .name = "pwm-backlight",
412 .dev = {
413 .parent = &pxa25x_device_pwm0.dev,
414 .platform_data = &viper_backlight_data,
415 },
416};
417
418/* Ethernet */
419static struct resource smc91x_resources[] = {
420 [0] = {
421 .name = "smc91x-regs",
422 .start = VIPER_ETH_PHYS + 0x300,
423 .end = VIPER_ETH_PHYS + 0x30f,
424 .flags = IORESOURCE_MEM,
425 },
426 [1] = {
427 .start = PXA_GPIO_TO_IRQ(VIPER_ETH_GPIO),
428 .end = PXA_GPIO_TO_IRQ(VIPER_ETH_GPIO),
429 .flags = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
430 },
431 [2] = {
432 .name = "smc91x-data32",
433 .start = VIPER_ETH_DATA_PHYS,
434 .end = VIPER_ETH_DATA_PHYS + 3,
435 .flags = IORESOURCE_MEM,
436 },
437};
438
439static struct smc91x_platdata viper_smc91x_info = {
440 .flags = SMC91X_USE_16BIT | SMC91X_NOWAIT,
441 .leda = RPC_LED_100_10,
442 .ledb = RPC_LED_TX_RX,
443};
444
445static struct platform_device smc91x_device = {
446 .name = "smc91x",
447 .id = -1,
448 .num_resources = ARRAY_SIZE(smc91x_resources),
449 .resource = smc91x_resources,
450 .dev = {
451 .platform_data = &viper_smc91x_info,
452 },
453};
454
455/* i2c */
456static struct i2c_gpio_platform_data i2c_bus_data = {
457 .sda_pin = VIPER_RTC_I2C_SDA_GPIO,
458 .scl_pin = VIPER_RTC_I2C_SCL_GPIO,
459 .udelay = 10,
460 .timeout = HZ,
461};
462
463static struct platform_device i2c_bus_device = {
464 .name = "i2c-gpio",
465 .id = 1, /* pxa2xx-i2c is bus 0, so start at 1 */
466 .dev = {
467 .platform_data = &i2c_bus_data,
468 }
469};
470
471static struct i2c_board_info __initdata viper_i2c_devices[] = {
472 {
473 I2C_BOARD_INFO("ds1338", 0x68),
474 },
475};
476
477/*
478 * Serial configuration:
479 * You can either have the standard PXA ports driven by the PXA driver,
480 * or all the ports (PXA + 16850) driven by the 8250 driver.
481 * Choose your poison.
482 */
483
484static struct resource viper_serial_resources[] = {
485#ifndef CONFIG_SERIAL_PXA
486 {
487 .start = 0x40100000,
488 .end = 0x4010001f,
489 .flags = IORESOURCE_MEM,
490 },
491 {
492 .start = 0x40200000,
493 .end = 0x4020001f,
494 .flags = IORESOURCE_MEM,
495 },
496 {
497 .start = 0x40700000,
498 .end = 0x4070001f,
499 .flags = IORESOURCE_MEM,
500 },
501 {
502 .start = VIPER_UARTA_PHYS,
503 .end = VIPER_UARTA_PHYS + 0xf,
504 .flags = IORESOURCE_MEM,
505 },
506 {
507 .start = VIPER_UARTB_PHYS,
508 .end = VIPER_UARTB_PHYS + 0xf,
509 .flags = IORESOURCE_MEM,
510 },
511#else
512 {
513 0,
514 },
515#endif
516};
517
518static struct plat_serial8250_port serial_platform_data[] = {
519#ifndef CONFIG_SERIAL_PXA
520 /* Internal UARTs */
521 {
522 .membase = (void *)&FFUART,
523 .mapbase = __PREG(FFUART),
524 .irq = IRQ_FFUART,
525 .uartclk = 921600 * 16,
526 .regshift = 2,
527 .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
528 .iotype = UPIO_MEM,
529 },
530 {
531 .membase = (void *)&BTUART,
532 .mapbase = __PREG(BTUART),
533 .irq = IRQ_BTUART,
534 .uartclk = 921600 * 16,
535 .regshift = 2,
536 .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
537 .iotype = UPIO_MEM,
538 },
539 {
540 .membase = (void *)&STUART,
541 .mapbase = __PREG(STUART),
542 .irq = IRQ_STUART,
543 .uartclk = 921600 * 16,
544 .regshift = 2,
545 .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
546 .iotype = UPIO_MEM,
547 },
548 /* External UARTs */
549 {
550 .mapbase = VIPER_UARTA_PHYS,
551 .irq = PXA_GPIO_TO_IRQ(VIPER_UARTA_GPIO),
552 .irqflags = IRQF_TRIGGER_RISING,
553 .uartclk = 1843200,
554 .regshift = 1,
555 .iotype = UPIO_MEM,
556 .flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP |
557 UPF_SKIP_TEST,
558 },
559 {
560 .mapbase = VIPER_UARTB_PHYS,
561 .irq = PXA_GPIO_TO_IRQ(VIPER_UARTB_GPIO),
562 .irqflags = IRQF_TRIGGER_RISING,
563 .uartclk = 1843200,
564 .regshift = 1,
565 .iotype = UPIO_MEM,
566 .flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP |
567 UPF_SKIP_TEST,
568 },
569#endif
570 { },
571};
572
573static struct platform_device serial_device = {
574 .name = "serial8250",
575 .id = 0,
576 .dev = {
577 .platform_data = serial_platform_data,
578 },
579 .num_resources = ARRAY_SIZE(viper_serial_resources),
580 .resource = viper_serial_resources,
581};
582
583/* USB */
584static void isp116x_delay(struct device *dev, int delay)
585{
586 ndelay(delay);
587}
588
589static struct resource isp116x_resources[] = {
590 [0] = { /* DATA */
591 .start = VIPER_USB_PHYS + 0,
592 .end = VIPER_USB_PHYS + 1,
593 .flags = IORESOURCE_MEM,
594 },
595 [1] = { /* ADDR */
596 .start = VIPER_USB_PHYS + 2,
597 .end = VIPER_USB_PHYS + 3,
598 .flags = IORESOURCE_MEM,
599 },
600 [2] = {
601 .start = PXA_GPIO_TO_IRQ(VIPER_USB_GPIO),
602 .end = PXA_GPIO_TO_IRQ(VIPER_USB_GPIO),
603 .flags = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
604 },
605};
606
607/* (DataBusWidth16|AnalogOCEnable|DREQOutputPolarity|DownstreamPort15KRSel ) */
608static struct isp116x_platform_data isp116x_platform_data = {
609 /* Enable internal resistors on downstream ports */
610 .sel15Kres = 1,
611 /* On-chip overcurrent protection */
612 .oc_enable = 1,
613 /* INT output polarity */
614 .int_act_high = 1,
615 /* INT edge or level triggered */
616 .int_edge_triggered = 0,
617
618 /* WAKEUP pin connected - NOT SUPPORTED */
619 /* .remote_wakeup_connected = 0, */
620 /* Wakeup by devices on usb bus enabled */
621 .remote_wakeup_enable = 0,
622 .delay = isp116x_delay,
623};
624
625static struct platform_device isp116x_device = {
626 .name = "isp116x-hcd",
627 .id = -1,
628 .num_resources = ARRAY_SIZE(isp116x_resources),
629 .resource = isp116x_resources,
630 .dev = {
631 .platform_data = &isp116x_platform_data,
632 },
633
634};
635
636/* MTD */
637static struct resource mtd_resources[] = {
638 [0] = { /* RedBoot config + filesystem flash */
639 .start = VIPER_FLASH_PHYS,
640 .end = VIPER_FLASH_PHYS + SZ_32M - 1,
641 .flags = IORESOURCE_MEM,
642 },
643 [1] = { /* Boot flash */
644 .start = VIPER_BOOT_PHYS,
645 .end = VIPER_BOOT_PHYS + SZ_1M - 1,
646 .flags = IORESOURCE_MEM,
647 },
648 [2] = { /*
649 * SRAM size is actually 256KB, 8bits, with a sparse mapping
650 * (each byte is on a 16bit boundary).
651 */
652 .start = _VIPER_SRAM_BASE,
653 .end = _VIPER_SRAM_BASE + SZ_512K - 1,
654 .flags = IORESOURCE_MEM,
655 },
656};
657
658static struct mtd_partition viper_boot_flash_partition = {
659 .name = "RedBoot",
660 .size = SZ_1M,
661 .offset = 0,
662 .mask_flags = MTD_WRITEABLE, /* force R/O */
663};
664
665static struct physmap_flash_data viper_flash_data[] = {
666 [0] = {
667 .width = 2,
668 .parts = NULL,
669 .nr_parts = 0,
670 },
671 [1] = {
672 .width = 2,
673 .parts = &viper_boot_flash_partition,
674 .nr_parts = 1,
675 },
676};
677
678static struct platform_device viper_mtd_devices[] = {
679 [0] = {
680 .name = "physmap-flash",
681 .id = 0,
682 .dev = {
683 .platform_data = &viper_flash_data[0],
684 },
685 .resource = &mtd_resources[0],
686 .num_resources = 1,
687 },
688 [1] = {
689 .name = "physmap-flash",
690 .id = 1,
691 .dev = {
692 .platform_data = &viper_flash_data[1],
693 },
694 .resource = &mtd_resources[1],
695 .num_resources = 1,
696 },
697};
698
699static struct platform_device *viper_devs[] __initdata = {
700 &smc91x_device,
701 &i2c_bus_device,
702 &serial_device,
703 &isp116x_device,
704 &viper_mtd_devices[0],
705 &viper_mtd_devices[1],
706 &viper_backlight_device,
707 &viper_pcmcia_device,
708};
709
710static mfp_cfg_t viper_pin_config[] __initdata = {
711 /* Chip selects */
712 GPIO15_nCS_1,
713 GPIO78_nCS_2,
714 GPIO79_nCS_3,
715 GPIO80_nCS_4,
716 GPIO33_nCS_5,
717
718 /* AC97 */
719 GPIO28_AC97_BITCLK,
720 GPIO29_AC97_SDATA_IN_0,
721 GPIO30_AC97_SDATA_OUT,
722 GPIO31_AC97_SYNC,
723
724 /* FP Backlight */
725 GPIO9_GPIO, /* VIPER_BCKLIGHT_EN_GPIO */
726 GPIO10_GPIO, /* VIPER_LCD_EN_GPIO */
727 GPIO16_PWM0_OUT,
728
729 /* Ethernet PHY Ready */
730 GPIO18_RDY,
731
732 /* Serial shutdown */
733 GPIO12_GPIO | MFP_LPM_DRIVE_HIGH, /* VIPER_UART_SHDN_GPIO */
734
735 /* Compact-Flash / PC104 */
736 GPIO48_nPOE,
737 GPIO49_nPWE,
738 GPIO50_nPIOR,
739 GPIO51_nPIOW,
740 GPIO52_nPCE_1,
741 GPIO53_nPCE_2,
742 GPIO54_nPSKTSEL,
743 GPIO55_nPREG,
744 GPIO56_nPWAIT,
745 GPIO57_nIOIS16,
746 GPIO8_GPIO, /* VIPER_CF_RDY_GPIO */
747 GPIO32_GPIO, /* VIPER_CF_CD_GPIO */
748 GPIO82_GPIO, /* VIPER_CF_POWER_GPIO */
749
750 /* Integrated UPS control */
751 GPIO20_GPIO, /* VIPER_UPS_GPIO */
752
753 /* Vcc regulator control */
754 GPIO6_GPIO, /* VIPER_PSU_DATA_GPIO */
755 GPIO11_GPIO, /* VIPER_PSU_CLK_GPIO */
756 GPIO19_GPIO, /* VIPER_PSU_nCS_LD_GPIO */
757
758 /* i2c busses */
759 GPIO26_GPIO, /* VIPER_TPM_I2C_SDA_GPIO */
760 GPIO27_GPIO, /* VIPER_TPM_I2C_SCL_GPIO */
761 GPIO83_GPIO, /* VIPER_RTC_I2C_SDA_GPIO */
762 GPIO84_GPIO, /* VIPER_RTC_I2C_SCL_GPIO */
763
764 /* PC/104 Interrupt */
765 GPIO1_GPIO | WAKEUP_ON_EDGE_RISE, /* VIPER_CPLD_GPIO */
766};
767
768static unsigned long viper_tpm;
769
770static int __init viper_tpm_setup(char *str)
771{
772 return strict_strtoul(str, 10, &viper_tpm) >= 0;
773}
774
775__setup("tpm=", viper_tpm_setup);
776
777static 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
812error_free_tpm:
813 kfree(tpm_device);
814error_tpm:
815 pr_err("viper: Couldn't %s, giving up\n", errstr);
816}
817
818static 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
839err_dir:
840 gpio_free(VIPER_PSU_nCS_LD_GPIO);
841err_request_cs:
842 gpio_free(VIPER_PSU_CLK_GPIO);
843err_request_clk:
844 gpio_free(VIPER_PSU_DATA_GPIO);
845err_request_data:
846 pr_err("viper: Failed to setup vcore control GPIOs\n");
847}
848
849static 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
859err_dir:
860 gpio_free(VIPER_UART_SHDN_GPIO);
861err_request:
862 pr_err("viper: Failed to setup UART shutdown GPIO\n");
863}
864
865#ifdef CONFIG_CPU_FREQ
866static 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 default:
889 /* ignore */
890 break;
891 }
892
893 return 0;
894}
895
896static struct notifier_block viper_cpufreq_notifier_block = {
897 .notifier_call = viper_cpufreq_notifier
898};
899
900static void __init viper_init_cpufreq(void)
901{
902 if (cpufreq_register_notifier(&viper_cpufreq_notifier_block,
903 CPUFREQ_TRANSITION_NOTIFIER))
904 pr_err("viper: Failed to setup cpufreq notifier\n");
905}
906#else
907static inline void viper_init_cpufreq(void) {}
908#endif
909
910static void viper_power_off(void)
911{
912 pr_notice("Shutting off UPS\n");
913 gpio_set_value(VIPER_UPS_GPIO, 1);
914 /* Spin to death... */
915 while (1);
916}
917
918static void __init viper_init(void)
919{
920 u8 version;
921
922 pm_power_off = viper_power_off;
923
924 pxa2xx_mfp_config(ARRAY_AND_SIZE(viper_pin_config));
925
926 pxa_set_ffuart_info(NULL);
927 pxa_set_btuart_info(NULL);
928 pxa_set_stuart_info(NULL);
929
930 /* Wake-up serial console */
931 viper_init_serial_gpio();
932
933 pxa_set_fb_info(NULL, &fb_info);
934
935 /* v1 hardware cannot use the datacs line */
936 version = viper_hw_version();
937 if (version == 0)
938 smc91x_device.num_resources--;
939
940 pxa_set_i2c_info(NULL);
941 platform_add_devices(viper_devs, ARRAY_SIZE(viper_devs));
942
943 viper_init_vcore_gpios();
944 viper_init_cpufreq();
945
946 register_syscore_ops(&viper_cpu_syscore_ops);
947
948 if (version) {
949 pr_info("viper: hardware v%di%d detected. "
950 "CPLD revision %d.\n",
951 VIPER_BOARD_VERSION(version),
952 VIPER_BOARD_ISSUE(version),
953 VIPER_CPLD_REVISION(version));
954 system_rev = (VIPER_BOARD_VERSION(version) << 8) |
955 (VIPER_BOARD_ISSUE(version) << 4) |
956 VIPER_CPLD_REVISION(version);
957 } else {
958 pr_info("viper: No version register.\n");
959 }
960
961 i2c_register_board_info(1, ARRAY_AND_SIZE(viper_i2c_devices));
962
963 viper_tpm_init();
964 pxa_set_ac97_info(NULL);
965}
966
967static struct map_desc viper_io_desc[] __initdata = {
968 {
969 .virtual = VIPER_CPLD_BASE,
970 .pfn = __phys_to_pfn(VIPER_CPLD_PHYS),
971 .length = 0x00300000,
972 .type = MT_DEVICE,
973 },
974 {
975 .virtual = VIPER_PC104IO_BASE,
976 .pfn = __phys_to_pfn(0x30000000),
977 .length = 0x00800000,
978 .type = MT_DEVICE,
979 },
980};
981
982static void __init viper_map_io(void)
983{
984 pxa25x_map_io();
985
986 iotable_init(viper_io_desc, ARRAY_SIZE(viper_io_desc));
987
988 PCFR |= PCFR_OPDE;
989}
990
991MACHINE_START(VIPER, "Arcom/Eurotech VIPER SBC")
992 /* Maintainer: Marc Zyngier <maz@misterjones.org> */
993 .atag_offset = 0x100,
994 .map_io = viper_map_io,
995 .nr_irqs = PXA_NR_IRQS,
996 .init_irq = viper_init_irq,
997 .handle_irq = pxa25x_handle_irq,
998 .init_time = pxa_timer_init,
999 .init_machine = viper_init,
1000 .restart = pxa_restart,
1001MACHINE_END
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * linux/arch/arm/mach-pxa/viper.c
4 *
5 * Support for the Arcom VIPER SBC.
6 *
7 * Author: Ian Campbell
8 * Created: Feb 03, 2003
9 * Copyright: Arcom Control Systems
10 *
11 * Maintained by Marc Zyngier <maz@misterjones.org>
12 * <marc.zyngier@altran.com>
13 *
14 * Based on lubbock.c:
15 * Author: Nicolas Pitre
16 * Created: Jun 15, 2001
17 * Copyright: MontaVista Software Inc.
18 */
19
20#include <linux/types.h>
21#include <linux/memory.h>
22#include <linux/cpu.h>
23#include <linux/cpufreq.h>
24#include <linux/delay.h>
25#include <linux/fs.h>
26#include <linux/init.h>
27#include <linux/slab.h>
28#include <linux/interrupt.h>
29#include <linux/major.h>
30#include <linux/module.h>
31#include <linux/pm.h>
32#include <linux/sched.h>
33#include <linux/gpio.h>
34#include <linux/jiffies.h>
35#include <linux/platform_data/i2c-gpio.h>
36#include <linux/gpio/machine.h>
37#include <linux/platform_data/i2c-pxa.h>
38#include <linux/serial_8250.h>
39#include <linux/smc91x.h>
40#include <linux/pwm.h>
41#include <linux/pwm_backlight.h>
42#include <linux/usb/isp116x.h>
43#include <linux/mtd/mtd.h>
44#include <linux/mtd/partitions.h>
45#include <linux/mtd/physmap.h>
46#include <linux/syscore_ops.h>
47
48#include "pxa25x.h"
49#include <mach/audio.h>
50#include <linux/platform_data/video-pxafb.h>
51#include <mach/regs-uart.h>
52#include <linux/platform_data/pcmcia-pxa2xx_viper.h>
53#include "viper.h"
54
55#include <asm/setup.h>
56#include <asm/mach-types.h>
57#include <asm/irq.h>
58#include <linux/sizes.h>
59#include <asm/system_info.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
68static unsigned int icr;
69
70static void viper_icr_set_bit(unsigned int bit)
71{
72 icr |= bit;
73 VIPER_ICR = icr;
74}
75
76static 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 */
83static 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
91static 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
98static 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 */
116static 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. */
135static int viper_cpu_suspend(void)
136{
137 viper_icr_set_bit(VIPER_ICR_R_DIS);
138 return 0;
139}
140
141static void viper_cpu_resume(void)
142{
143 viper_icr_clear_bit(VIPER_ICR_R_DIS);
144}
145
146static struct syscore_ops viper_cpu_syscore_ops = {
147 .suspend = viper_cpu_suspend,
148 .resume = viper_cpu_resume,
149};
150
151static 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 */
164static 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 */
221static unsigned long viper_irq_enabled_mask;
222static const int viper_isa_irqs[] = { 3, 4, 5, 6, 7, 10, 11, 12, 9, 14, 15 };
223static 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
242static inline int viper_irq_to_bitmask(unsigned int irq)
243{
244 return viper_isa_irq_map[irq - PXA_ISA_IRQ(0)];
245}
246
247static inline int viper_bit_to_irq(int bit)
248{
249 return viper_isa_irqs[bit] + PXA_ISA_IRQ(0);
250}
251
252static 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
262static void viper_mask_irq(struct irq_data *d)
263{
264 viper_irq_enabled_mask &= ~(viper_irq_to_bitmask(d->irq));
265}
266
267static void viper_unmask_irq(struct irq_data *d)
268{
269 viper_irq_enabled_mask |= viper_irq_to_bitmask(d->irq);
270}
271
272static 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
278static void viper_irq_handler(struct irq_desc *desc)
279{
280 unsigned int irq;
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
297static 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
304static 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 irq_clear_status_flags(isa_irq, IRQ_NOREQUEST | IRQ_NOPROBE);
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 */
325static 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
346static 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
352static struct pwm_lookup viper_pwm_lookup[] = {
353 PWM_LOOKUP("pxa25x-pwm.0", 0, "pwm-backlight.0", NULL, 1000000,
354 PWM_POLARITY_NORMAL),
355};
356
357static int viper_backlight_init(struct device *dev)
358{
359 int ret;
360
361 /* GPIO9 and 10 control FB backlight. Initialise to off */
362 ret = gpio_request(VIPER_BCKLIGHT_EN_GPIO, "Backlight");
363 if (ret)
364 goto err_request_bckl;
365
366 ret = gpio_request(VIPER_LCD_EN_GPIO, "LCD");
367 if (ret)
368 goto err_request_lcd;
369
370 ret = gpio_direction_output(VIPER_BCKLIGHT_EN_GPIO, 0);
371 if (ret)
372 goto err_dir;
373
374 ret = gpio_direction_output(VIPER_LCD_EN_GPIO, 0);
375 if (ret)
376 goto err_dir;
377
378 return 0;
379
380err_dir:
381 gpio_free(VIPER_LCD_EN_GPIO);
382err_request_lcd:
383 gpio_free(VIPER_BCKLIGHT_EN_GPIO);
384err_request_bckl:
385 dev_err(dev, "Failed to setup LCD GPIOs\n");
386
387 return ret;
388}
389
390static int viper_backlight_notify(struct device *dev, int brightness)
391{
392 gpio_set_value(VIPER_LCD_EN_GPIO, !!brightness);
393 gpio_set_value(VIPER_BCKLIGHT_EN_GPIO, !!brightness);
394
395 return brightness;
396}
397
398static void viper_backlight_exit(struct device *dev)
399{
400 gpio_free(VIPER_LCD_EN_GPIO);
401 gpio_free(VIPER_BCKLIGHT_EN_GPIO);
402}
403
404static struct platform_pwm_backlight_data viper_backlight_data = {
405 .max_brightness = 100,
406 .dft_brightness = 100,
407 .init = viper_backlight_init,
408 .notify = viper_backlight_notify,
409 .exit = viper_backlight_exit,
410};
411
412static struct platform_device viper_backlight_device = {
413 .name = "pwm-backlight",
414 .dev = {
415 .parent = &pxa25x_device_pwm0.dev,
416 .platform_data = &viper_backlight_data,
417 },
418};
419
420/* Ethernet */
421static struct resource smc91x_resources[] = {
422 [0] = {
423 .name = "smc91x-regs",
424 .start = VIPER_ETH_PHYS + 0x300,
425 .end = VIPER_ETH_PHYS + 0x30f,
426 .flags = IORESOURCE_MEM,
427 },
428 [1] = {
429 .start = PXA_GPIO_TO_IRQ(VIPER_ETH_GPIO),
430 .end = PXA_GPIO_TO_IRQ(VIPER_ETH_GPIO),
431 .flags = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
432 },
433 [2] = {
434 .name = "smc91x-data32",
435 .start = VIPER_ETH_DATA_PHYS,
436 .end = VIPER_ETH_DATA_PHYS + 3,
437 .flags = IORESOURCE_MEM,
438 },
439};
440
441static struct smc91x_platdata viper_smc91x_info = {
442 .flags = SMC91X_USE_16BIT | SMC91X_NOWAIT,
443 .leda = RPC_LED_100_10,
444 .ledb = RPC_LED_TX_RX,
445};
446
447static struct platform_device smc91x_device = {
448 .name = "smc91x",
449 .id = -1,
450 .num_resources = ARRAY_SIZE(smc91x_resources),
451 .resource = smc91x_resources,
452 .dev = {
453 .platform_data = &viper_smc91x_info,
454 },
455};
456
457/* i2c */
458static struct gpiod_lookup_table viper_i2c_gpiod_table = {
459 .dev_id = "i2c-gpio.1",
460 .table = {
461 GPIO_LOOKUP_IDX("gpio-pxa", VIPER_RTC_I2C_SDA_GPIO,
462 NULL, 0, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
463 GPIO_LOOKUP_IDX("gpio-pxa", VIPER_RTC_I2C_SCL_GPIO,
464 NULL, 1, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
465 },
466};
467
468static struct i2c_gpio_platform_data i2c_bus_data = {
469 .udelay = 10,
470 .timeout = HZ,
471};
472
473static struct platform_device i2c_bus_device = {
474 .name = "i2c-gpio",
475 .id = 1, /* pxa2xx-i2c is bus 0, so start at 1 */
476 .dev = {
477 .platform_data = &i2c_bus_data,
478 }
479};
480
481static struct i2c_board_info __initdata viper_i2c_devices[] = {
482 {
483 I2C_BOARD_INFO("ds1338", 0x68),
484 },
485};
486
487/*
488 * Serial configuration:
489 * You can either have the standard PXA ports driven by the PXA driver,
490 * or all the ports (PXA + 16850) driven by the 8250 driver.
491 * Choose your poison.
492 */
493
494static struct resource viper_serial_resources[] = {
495#ifndef CONFIG_SERIAL_PXA
496 {
497 .start = 0x40100000,
498 .end = 0x4010001f,
499 .flags = IORESOURCE_MEM,
500 },
501 {
502 .start = 0x40200000,
503 .end = 0x4020001f,
504 .flags = IORESOURCE_MEM,
505 },
506 {
507 .start = 0x40700000,
508 .end = 0x4070001f,
509 .flags = IORESOURCE_MEM,
510 },
511 {
512 .start = VIPER_UARTA_PHYS,
513 .end = VIPER_UARTA_PHYS + 0xf,
514 .flags = IORESOURCE_MEM,
515 },
516 {
517 .start = VIPER_UARTB_PHYS,
518 .end = VIPER_UARTB_PHYS + 0xf,
519 .flags = IORESOURCE_MEM,
520 },
521#else
522 {
523 0,
524 },
525#endif
526};
527
528static struct plat_serial8250_port serial_platform_data[] = {
529#ifndef CONFIG_SERIAL_PXA
530 /* Internal UARTs */
531 {
532 .membase = (void *)&FFUART,
533 .mapbase = __PREG(FFUART),
534 .irq = IRQ_FFUART,
535 .uartclk = 921600 * 16,
536 .regshift = 2,
537 .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
538 .iotype = UPIO_MEM,
539 },
540 {
541 .membase = (void *)&BTUART,
542 .mapbase = __PREG(BTUART),
543 .irq = IRQ_BTUART,
544 .uartclk = 921600 * 16,
545 .regshift = 2,
546 .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
547 .iotype = UPIO_MEM,
548 },
549 {
550 .membase = (void *)&STUART,
551 .mapbase = __PREG(STUART),
552 .irq = IRQ_STUART,
553 .uartclk = 921600 * 16,
554 .regshift = 2,
555 .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
556 .iotype = UPIO_MEM,
557 },
558 /* External UARTs */
559 {
560 .mapbase = VIPER_UARTA_PHYS,
561 .irq = PXA_GPIO_TO_IRQ(VIPER_UARTA_GPIO),
562 .irqflags = IRQF_TRIGGER_RISING,
563 .uartclk = 1843200,
564 .regshift = 1,
565 .iotype = UPIO_MEM,
566 .flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP |
567 UPF_SKIP_TEST,
568 },
569 {
570 .mapbase = VIPER_UARTB_PHYS,
571 .irq = PXA_GPIO_TO_IRQ(VIPER_UARTB_GPIO),
572 .irqflags = IRQF_TRIGGER_RISING,
573 .uartclk = 1843200,
574 .regshift = 1,
575 .iotype = UPIO_MEM,
576 .flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP |
577 UPF_SKIP_TEST,
578 },
579#endif
580 { },
581};
582
583static struct platform_device serial_device = {
584 .name = "serial8250",
585 .id = 0,
586 .dev = {
587 .platform_data = serial_platform_data,
588 },
589 .num_resources = ARRAY_SIZE(viper_serial_resources),
590 .resource = viper_serial_resources,
591};
592
593/* USB */
594static void isp116x_delay(struct device *dev, int delay)
595{
596 ndelay(delay);
597}
598
599static struct resource isp116x_resources[] = {
600 [0] = { /* DATA */
601 .start = VIPER_USB_PHYS + 0,
602 .end = VIPER_USB_PHYS + 1,
603 .flags = IORESOURCE_MEM,
604 },
605 [1] = { /* ADDR */
606 .start = VIPER_USB_PHYS + 2,
607 .end = VIPER_USB_PHYS + 3,
608 .flags = IORESOURCE_MEM,
609 },
610 [2] = {
611 .start = PXA_GPIO_TO_IRQ(VIPER_USB_GPIO),
612 .end = PXA_GPIO_TO_IRQ(VIPER_USB_GPIO),
613 .flags = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
614 },
615};
616
617/* (DataBusWidth16|AnalogOCEnable|DREQOutputPolarity|DownstreamPort15KRSel ) */
618static struct isp116x_platform_data isp116x_platform_data = {
619 /* Enable internal resistors on downstream ports */
620 .sel15Kres = 1,
621 /* On-chip overcurrent protection */
622 .oc_enable = 1,
623 /* INT output polarity */
624 .int_act_high = 1,
625 /* INT edge or level triggered */
626 .int_edge_triggered = 0,
627
628 /* WAKEUP pin connected - NOT SUPPORTED */
629 /* .remote_wakeup_connected = 0, */
630 /* Wakeup by devices on usb bus enabled */
631 .remote_wakeup_enable = 0,
632 .delay = isp116x_delay,
633};
634
635static struct platform_device isp116x_device = {
636 .name = "isp116x-hcd",
637 .id = -1,
638 .num_resources = ARRAY_SIZE(isp116x_resources),
639 .resource = isp116x_resources,
640 .dev = {
641 .platform_data = &isp116x_platform_data,
642 },
643
644};
645
646/* MTD */
647static struct resource mtd_resources[] = {
648 [0] = { /* RedBoot config + filesystem flash */
649 .start = VIPER_FLASH_PHYS,
650 .end = VIPER_FLASH_PHYS + SZ_32M - 1,
651 .flags = IORESOURCE_MEM,
652 },
653 [1] = { /* Boot flash */
654 .start = VIPER_BOOT_PHYS,
655 .end = VIPER_BOOT_PHYS + SZ_1M - 1,
656 .flags = IORESOURCE_MEM,
657 },
658 [2] = { /*
659 * SRAM size is actually 256KB, 8bits, with a sparse mapping
660 * (each byte is on a 16bit boundary).
661 */
662 .start = _VIPER_SRAM_BASE,
663 .end = _VIPER_SRAM_BASE + SZ_512K - 1,
664 .flags = IORESOURCE_MEM,
665 },
666};
667
668static struct mtd_partition viper_boot_flash_partition = {
669 .name = "RedBoot",
670 .size = SZ_1M,
671 .offset = 0,
672 .mask_flags = MTD_WRITEABLE, /* force R/O */
673};
674
675static struct physmap_flash_data viper_flash_data[] = {
676 [0] = {
677 .width = 2,
678 .parts = NULL,
679 .nr_parts = 0,
680 },
681 [1] = {
682 .width = 2,
683 .parts = &viper_boot_flash_partition,
684 .nr_parts = 1,
685 },
686};
687
688static struct platform_device viper_mtd_devices[] = {
689 [0] = {
690 .name = "physmap-flash",
691 .id = 0,
692 .dev = {
693 .platform_data = &viper_flash_data[0],
694 },
695 .resource = &mtd_resources[0],
696 .num_resources = 1,
697 },
698 [1] = {
699 .name = "physmap-flash",
700 .id = 1,
701 .dev = {
702 .platform_data = &viper_flash_data[1],
703 },
704 .resource = &mtd_resources[1],
705 .num_resources = 1,
706 },
707};
708
709static struct platform_device *viper_devs[] __initdata = {
710 &smc91x_device,
711 &i2c_bus_device,
712 &serial_device,
713 &isp116x_device,
714 &viper_mtd_devices[0],
715 &viper_mtd_devices[1],
716 &viper_backlight_device,
717 &viper_pcmcia_device,
718};
719
720static mfp_cfg_t viper_pin_config[] __initdata = {
721 /* Chip selects */
722 GPIO15_nCS_1,
723 GPIO78_nCS_2,
724 GPIO79_nCS_3,
725 GPIO80_nCS_4,
726 GPIO33_nCS_5,
727
728 /* AC97 */
729 GPIO28_AC97_BITCLK,
730 GPIO29_AC97_SDATA_IN_0,
731 GPIO30_AC97_SDATA_OUT,
732 GPIO31_AC97_SYNC,
733
734 /* FP Backlight */
735 GPIO9_GPIO, /* VIPER_BCKLIGHT_EN_GPIO */
736 GPIO10_GPIO, /* VIPER_LCD_EN_GPIO */
737 GPIO16_PWM0_OUT,
738
739 /* Ethernet PHY Ready */
740 GPIO18_RDY,
741
742 /* Serial shutdown */
743 GPIO12_GPIO | MFP_LPM_DRIVE_HIGH, /* VIPER_UART_SHDN_GPIO */
744
745 /* Compact-Flash / PC104 */
746 GPIO48_nPOE,
747 GPIO49_nPWE,
748 GPIO50_nPIOR,
749 GPIO51_nPIOW,
750 GPIO52_nPCE_1,
751 GPIO53_nPCE_2,
752 GPIO54_nPSKTSEL,
753 GPIO55_nPREG,
754 GPIO56_nPWAIT,
755 GPIO57_nIOIS16,
756 GPIO8_GPIO, /* VIPER_CF_RDY_GPIO */
757 GPIO32_GPIO, /* VIPER_CF_CD_GPIO */
758 GPIO82_GPIO, /* VIPER_CF_POWER_GPIO */
759
760 /* Integrated UPS control */
761 GPIO20_GPIO, /* VIPER_UPS_GPIO */
762
763 /* Vcc regulator control */
764 GPIO6_GPIO, /* VIPER_PSU_DATA_GPIO */
765 GPIO11_GPIO, /* VIPER_PSU_CLK_GPIO */
766 GPIO19_GPIO, /* VIPER_PSU_nCS_LD_GPIO */
767
768 /* i2c busses */
769 GPIO26_GPIO, /* VIPER_TPM_I2C_SDA_GPIO */
770 GPIO27_GPIO, /* VIPER_TPM_I2C_SCL_GPIO */
771 GPIO83_GPIO, /* VIPER_RTC_I2C_SDA_GPIO */
772 GPIO84_GPIO, /* VIPER_RTC_I2C_SCL_GPIO */
773
774 /* PC/104 Interrupt */
775 GPIO1_GPIO | WAKEUP_ON_EDGE_RISE, /* VIPER_CPLD_GPIO */
776};
777
778static unsigned long viper_tpm;
779
780static int __init viper_tpm_setup(char *str)
781{
782 return kstrtoul(str, 10, &viper_tpm) >= 0;
783}
784
785__setup("tpm=", viper_tpm_setup);
786
787struct gpiod_lookup_table viper_tpm_i2c_gpiod_table = {
788 .dev_id = "i2c-gpio.2",
789 .table = {
790 GPIO_LOOKUP_IDX("gpio-pxa", VIPER_TPM_I2C_SDA_GPIO,
791 NULL, 0, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
792 GPIO_LOOKUP_IDX("gpio-pxa", VIPER_TPM_I2C_SCL_GPIO,
793 NULL, 1, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
794 },
795};
796
797static void __init viper_tpm_init(void)
798{
799 struct platform_device *tpm_device;
800 struct i2c_gpio_platform_data i2c_tpm_data = {
801 .udelay = 10,
802 .timeout = HZ,
803 };
804 char *errstr;
805
806 /* Allocate TPM i2c bus if requested */
807 if (!viper_tpm)
808 return;
809
810 gpiod_add_lookup_table(&viper_tpm_i2c_gpiod_table);
811 tpm_device = platform_device_alloc("i2c-gpio", 2);
812 if (tpm_device) {
813 if (!platform_device_add_data(tpm_device,
814 &i2c_tpm_data,
815 sizeof(i2c_tpm_data))) {
816 if (platform_device_add(tpm_device)) {
817 errstr = "register TPM i2c bus";
818 goto error_free_tpm;
819 }
820 } else {
821 errstr = "allocate TPM i2c bus data";
822 goto error_free_tpm;
823 }
824 } else {
825 errstr = "allocate TPM i2c device";
826 goto error_tpm;
827 }
828
829 return;
830
831error_free_tpm:
832 kfree(tpm_device);
833error_tpm:
834 pr_err("viper: Couldn't %s, giving up\n", errstr);
835}
836
837static void __init viper_init_vcore_gpios(void)
838{
839 if (gpio_request(VIPER_PSU_DATA_GPIO, "PSU data"))
840 goto err_request_data;
841
842 if (gpio_request(VIPER_PSU_CLK_GPIO, "PSU clock"))
843 goto err_request_clk;
844
845 if (gpio_request(VIPER_PSU_nCS_LD_GPIO, "PSU cs"))
846 goto err_request_cs;
847
848 if (gpio_direction_output(VIPER_PSU_DATA_GPIO, 0) ||
849 gpio_direction_output(VIPER_PSU_CLK_GPIO, 0) ||
850 gpio_direction_output(VIPER_PSU_nCS_LD_GPIO, 0))
851 goto err_dir;
852
853 /* c/should assume redboot set the correct level ??? */
854 viper_set_core_cpu_voltage(get_clk_frequency_khz(0), 1);
855
856 return;
857
858err_dir:
859 gpio_free(VIPER_PSU_nCS_LD_GPIO);
860err_request_cs:
861 gpio_free(VIPER_PSU_CLK_GPIO);
862err_request_clk:
863 gpio_free(VIPER_PSU_DATA_GPIO);
864err_request_data:
865 pr_err("viper: Failed to setup vcore control GPIOs\n");
866}
867
868static void __init viper_init_serial_gpio(void)
869{
870 if (gpio_request(VIPER_UART_SHDN_GPIO, "UARTs shutdown"))
871 goto err_request;
872
873 if (gpio_direction_output(VIPER_UART_SHDN_GPIO, 0))
874 goto err_dir;
875
876 return;
877
878err_dir:
879 gpio_free(VIPER_UART_SHDN_GPIO);
880err_request:
881 pr_err("viper: Failed to setup UART shutdown GPIO\n");
882}
883
884#ifdef CONFIG_CPU_FREQ
885static int viper_cpufreq_notifier(struct notifier_block *nb,
886 unsigned long val, void *data)
887{
888 struct cpufreq_freqs *freq = data;
889
890 /* TODO: Adjust timings??? */
891
892 switch (val) {
893 case CPUFREQ_PRECHANGE:
894 if (freq->old < freq->new) {
895 /* we are getting faster so raise the voltage
896 * before we change freq */
897 viper_set_core_cpu_voltage(freq->new, 0);
898 }
899 break;
900 case CPUFREQ_POSTCHANGE:
901 if (freq->old > freq->new) {
902 /* we are slowing down so drop the power
903 * after we change freq */
904 viper_set_core_cpu_voltage(freq->new, 0);
905 }
906 break;
907 default:
908 /* ignore */
909 break;
910 }
911
912 return 0;
913}
914
915static struct notifier_block viper_cpufreq_notifier_block = {
916 .notifier_call = viper_cpufreq_notifier
917};
918
919static void __init viper_init_cpufreq(void)
920{
921 if (cpufreq_register_notifier(&viper_cpufreq_notifier_block,
922 CPUFREQ_TRANSITION_NOTIFIER))
923 pr_err("viper: Failed to setup cpufreq notifier\n");
924}
925#else
926static inline void viper_init_cpufreq(void) {}
927#endif
928
929static void viper_power_off(void)
930{
931 pr_notice("Shutting off UPS\n");
932 gpio_set_value(VIPER_UPS_GPIO, 1);
933 /* Spin to death... */
934 while (1);
935}
936
937static void __init viper_init(void)
938{
939 u8 version;
940
941 pm_power_off = viper_power_off;
942
943 pxa2xx_mfp_config(ARRAY_AND_SIZE(viper_pin_config));
944
945 pxa_set_ffuart_info(NULL);
946 pxa_set_btuart_info(NULL);
947 pxa_set_stuart_info(NULL);
948
949 /* Wake-up serial console */
950 viper_init_serial_gpio();
951
952 pxa_set_fb_info(NULL, &fb_info);
953
954 /* v1 hardware cannot use the datacs line */
955 version = viper_hw_version();
956 if (version == 0)
957 smc91x_device.num_resources--;
958
959 pxa_set_i2c_info(NULL);
960 gpiod_add_lookup_table(&viper_i2c_gpiod_table);
961 pwm_add_table(viper_pwm_lookup, ARRAY_SIZE(viper_pwm_lookup));
962 platform_add_devices(viper_devs, ARRAY_SIZE(viper_devs));
963
964 viper_init_vcore_gpios();
965 viper_init_cpufreq();
966
967 register_syscore_ops(&viper_cpu_syscore_ops);
968
969 if (version) {
970 pr_info("viper: hardware v%di%d detected. "
971 "CPLD revision %d.\n",
972 VIPER_BOARD_VERSION(version),
973 VIPER_BOARD_ISSUE(version),
974 VIPER_CPLD_REVISION(version));
975 system_rev = (VIPER_BOARD_VERSION(version) << 8) |
976 (VIPER_BOARD_ISSUE(version) << 4) |
977 VIPER_CPLD_REVISION(version);
978 } else {
979 pr_info("viper: No version register.\n");
980 }
981
982 i2c_register_board_info(1, ARRAY_AND_SIZE(viper_i2c_devices));
983
984 viper_tpm_init();
985 pxa_set_ac97_info(NULL);
986}
987
988static struct map_desc viper_io_desc[] __initdata = {
989 {
990 .virtual = VIPER_CPLD_BASE,
991 .pfn = __phys_to_pfn(VIPER_CPLD_PHYS),
992 .length = 0x00300000,
993 .type = MT_DEVICE,
994 },
995 {
996 .virtual = VIPER_PC104IO_BASE,
997 .pfn = __phys_to_pfn(0x30000000),
998 .length = 0x00800000,
999 .type = MT_DEVICE,
1000 },
1001};
1002
1003static void __init viper_map_io(void)
1004{
1005 pxa25x_map_io();
1006
1007 iotable_init(viper_io_desc, ARRAY_SIZE(viper_io_desc));
1008
1009 PCFR |= PCFR_OPDE;
1010}
1011
1012MACHINE_START(VIPER, "Arcom/Eurotech VIPER SBC")
1013 /* Maintainer: Marc Zyngier <maz@misterjones.org> */
1014 .atag_offset = 0x100,
1015 .map_io = viper_map_io,
1016 .nr_irqs = PXA_NR_IRQS,
1017 .init_irq = viper_init_irq,
1018 .handle_irq = pxa25x_handle_irq,
1019 .init_time = pxa_timer_init,
1020 .init_machine = viper_init,
1021 .restart = pxa_restart,
1022MACHINE_END