Merge tag 'armsoc-dt' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
[sfrench/cifs-2.6.git] / arch / arm / mach-pxa / viper.c
1 /*
2  *  linux/arch/arm/mach-pxa/viper.c
3  *
4  *  Support for the Arcom VIPER SBC.
5  *
6  *  Author:     Ian Campbell
7  *  Created:    Feb 03, 2003
8  *  Copyright:  Arcom Control Systems
9  *
10  *  Maintained by Marc Zyngier <maz@misterjones.org>
11  *                             <marc.zyngier@altran.com>
12  *
13  * Based on lubbock.c:
14  *  Author:     Nicolas Pitre
15  *  Created:    Jun 15, 2001
16  *  Copyright:  MontaVista Software Inc.
17  *
18  *  This program is free software; you can redistribute it and/or modify
19  *  it under the terms of the GNU General Public License version 2 as
20  *  published by the Free Software Foundation.
21  */
22
23 #include <linux/types.h>
24 #include <linux/memory.h>
25 #include <linux/cpu.h>
26 #include <linux/cpufreq.h>
27 #include <linux/delay.h>
28 #include <linux/fs.h>
29 #include <linux/init.h>
30 #include <linux/slab.h>
31 #include <linux/interrupt.h>
32 #include <linux/major.h>
33 #include <linux/module.h>
34 #include <linux/pm.h>
35 #include <linux/sched.h>
36 #include <linux/gpio.h>
37 #include <linux/jiffies.h>
38 #include <linux/platform_data/i2c-gpio.h>
39 #include <linux/gpio/machine.h>
40 #include <linux/platform_data/i2c-pxa.h>
41 #include <linux/serial_8250.h>
42 #include <linux/smc91x.h>
43 #include <linux/pwm.h>
44 #include <linux/pwm_backlight.h>
45 #include <linux/usb/isp116x.h>
46 #include <linux/mtd/mtd.h>
47 #include <linux/mtd/partitions.h>
48 #include <linux/mtd/physmap.h>
49 #include <linux/syscore_ops.h>
50
51 #include "pxa25x.h"
52 #include <mach/audio.h>
53 #include <linux/platform_data/video-pxafb.h>
54 #include <mach/regs-uart.h>
55 #include <linux/platform_data/pcmcia-pxa2xx_viper.h>
56 #include "viper.h"
57
58 #include <asm/setup.h>
59 #include <asm/mach-types.h>
60 #include <asm/irq.h>
61 #include <linux/sizes.h>
62 #include <asm/system_info.h>
63
64 #include <asm/mach/arch.h>
65 #include <asm/mach/map.h>
66 #include <asm/mach/irq.h>
67
68 #include "generic.h"
69 #include "devices.h"
70
71 static unsigned int icr;
72
73 static void viper_icr_set_bit(unsigned int bit)
74 {
75         icr |= bit;
76         VIPER_ICR = icr;
77 }
78
79 static void viper_icr_clear_bit(unsigned int bit)
80 {
81         icr &= ~bit;
82         VIPER_ICR = icr;
83 }
84
85 /* This function is used from the pcmcia module to reset the CF */
86 static void viper_cf_reset(int state)
87 {
88         if (state)
89                 viper_icr_set_bit(VIPER_ICR_CF_RST);
90         else
91                 viper_icr_clear_bit(VIPER_ICR_CF_RST);
92 }
93
94 static struct arcom_pcmcia_pdata viper_pcmcia_info = {
95         .cd_gpio        = VIPER_CF_CD_GPIO,
96         .rdy_gpio       = VIPER_CF_RDY_GPIO,
97         .pwr_gpio       = VIPER_CF_POWER_GPIO,
98         .reset          = viper_cf_reset,
99 };
100
101 static struct platform_device viper_pcmcia_device = {
102         .name           = "viper-pcmcia",
103         .id             = -1,
104         .dev            = {
105                 .platform_data  = &viper_pcmcia_info,
106         },
107 };
108
109 /*
110  * The CPLD version register was not present on VIPER boards prior to
111  * v2i1. On v1 boards where the version register is not present we
112  * will just read back the previous value from the databus.
113  *
114  * Therefore we do two reads. The first time we write 0 to the
115  * (read-only) register before reading and the second time we write
116  * 0xff first. If the two reads do not match or they read back as 0xff
117  * or 0x00 then we have version 1 hardware.
118  */
119 static u8 viper_hw_version(void)
120 {
121         u8 v1, v2;
122         unsigned long flags;
123
124         local_irq_save(flags);
125
126         VIPER_VERSION = 0;
127         v1 = VIPER_VERSION;
128         VIPER_VERSION = 0xff;
129         v2 = VIPER_VERSION;
130
131         v1 = (v1 != v2 || v1 == 0xff) ? 0 : v1;
132
133         local_irq_restore(flags);
134         return v1;
135 }
136
137 /* CPU system core operations. */
138 static int viper_cpu_suspend(void)
139 {
140         viper_icr_set_bit(VIPER_ICR_R_DIS);
141         return 0;
142 }
143
144 static void viper_cpu_resume(void)
145 {
146         viper_icr_clear_bit(VIPER_ICR_R_DIS);
147 }
148
149 static struct syscore_ops viper_cpu_syscore_ops = {
150         .suspend        = viper_cpu_suspend,
151         .resume         = viper_cpu_resume,
152 };
153
154 static unsigned int current_voltage_divisor;
155
156 /*
157  * If force is not true then step from existing to new divisor. If
158  * force is true then jump straight to the new divisor. Stepping is
159  * used because if the jump in voltage is too large, the VCC can dip
160  * too low and the regulator cuts out.
161  *
162  * force can be used to initialize the divisor to a know state by
163  * setting the value for the current clock speed, since we are already
164  * running at that speed we know the voltage should be pretty close so
165  * the jump won't be too large
166  */
167 static void viper_set_core_cpu_voltage(unsigned long khz, int force)
168 {
169         int i = 0;
170         unsigned int divisor = 0;
171         const char *v;
172
173         if (khz < 200000) {
174                 v = "1.0"; divisor = 0xfff;
175         } else if (khz < 300000) {
176                 v = "1.1"; divisor = 0xde5;
177         } else {
178                 v = "1.3"; divisor = 0x325;
179         }
180
181         pr_debug("viper: setting CPU core voltage to %sV at %d.%03dMHz\n",
182                  v, (int)khz / 1000, (int)khz % 1000);
183
184 #define STEP 0x100
185         do {
186                 int step;
187
188                 if (force)
189                         step = divisor;
190                 else if (current_voltage_divisor < divisor - STEP)
191                         step = current_voltage_divisor + STEP;
192                 else if (current_voltage_divisor > divisor + STEP)
193                         step = current_voltage_divisor - STEP;
194                 else
195                         step = divisor;
196                 force = 0;
197
198                 gpio_set_value(VIPER_PSU_CLK_GPIO, 0);
199                 gpio_set_value(VIPER_PSU_nCS_LD_GPIO, 0);
200
201                 for (i = 1 << 11 ; i > 0 ; i >>= 1) {
202                         udelay(1);
203
204                         gpio_set_value(VIPER_PSU_DATA_GPIO, step & i);
205                         udelay(1);
206
207                         gpio_set_value(VIPER_PSU_CLK_GPIO, 1);
208                         udelay(1);
209
210                         gpio_set_value(VIPER_PSU_CLK_GPIO, 0);
211                 }
212                 udelay(1);
213
214                 gpio_set_value(VIPER_PSU_nCS_LD_GPIO, 1);
215                 udelay(1);
216
217                 gpio_set_value(VIPER_PSU_nCS_LD_GPIO, 0);
218
219                 current_voltage_divisor = step;
220         } while (current_voltage_divisor != divisor);
221 }
222
223 /* Interrupt handling */
224 static unsigned long viper_irq_enabled_mask;
225 static const int viper_isa_irqs[] = { 3, 4, 5, 6, 7, 10, 11, 12, 9, 14, 15 };
226 static const int viper_isa_irq_map[] = {
227         0,              /* ISA irq #0, invalid */
228         0,              /* ISA irq #1, invalid */
229         0,              /* ISA irq #2, invalid */
230         1 << 0,         /* ISA irq #3 */
231         1 << 1,         /* ISA irq #4 */
232         1 << 2,         /* ISA irq #5 */
233         1 << 3,         /* ISA irq #6 */
234         1 << 4,         /* ISA irq #7 */
235         0,              /* ISA irq #8, invalid */
236         1 << 8,         /* ISA irq #9 */
237         1 << 5,         /* ISA irq #10 */
238         1 << 6,         /* ISA irq #11 */
239         1 << 7,         /* ISA irq #12 */
240         0,              /* ISA irq #13, invalid */
241         1 << 9,         /* ISA irq #14 */
242         1 << 10,        /* ISA irq #15 */
243 };
244
245 static inline int viper_irq_to_bitmask(unsigned int irq)
246 {
247         return viper_isa_irq_map[irq - PXA_ISA_IRQ(0)];
248 }
249
250 static inline int viper_bit_to_irq(int bit)
251 {
252         return viper_isa_irqs[bit] + PXA_ISA_IRQ(0);
253 }
254
255 static void viper_ack_irq(struct irq_data *d)
256 {
257         int viper_irq = viper_irq_to_bitmask(d->irq);
258
259         if (viper_irq & 0xff)
260                 VIPER_LO_IRQ_STATUS = viper_irq;
261         else
262                 VIPER_HI_IRQ_STATUS = (viper_irq >> 8);
263 }
264
265 static void viper_mask_irq(struct irq_data *d)
266 {
267         viper_irq_enabled_mask &= ~(viper_irq_to_bitmask(d->irq));
268 }
269
270 static void viper_unmask_irq(struct irq_data *d)
271 {
272         viper_irq_enabled_mask |= viper_irq_to_bitmask(d->irq);
273 }
274
275 static inline unsigned long viper_irq_pending(void)
276 {
277         return (VIPER_HI_IRQ_STATUS << 8 | VIPER_LO_IRQ_STATUS) &
278                         viper_irq_enabled_mask;
279 }
280
281 static void viper_irq_handler(struct irq_desc *desc)
282 {
283         unsigned int irq;
284         unsigned long pending;
285
286         pending = viper_irq_pending();
287         do {
288                 /* we're in a chained irq handler,
289                  * so ack the interrupt by hand */
290                 desc->irq_data.chip->irq_ack(&desc->irq_data);
291
292                 if (likely(pending)) {
293                         irq = viper_bit_to_irq(__ffs(pending));
294                         generic_handle_irq(irq);
295                 }
296                 pending = viper_irq_pending();
297         } while (pending);
298 }
299
300 static struct irq_chip viper_irq_chip = {
301         .name           = "ISA",
302         .irq_ack        = viper_ack_irq,
303         .irq_mask       = viper_mask_irq,
304         .irq_unmask     = viper_unmask_irq
305 };
306
307 static void __init viper_init_irq(void)
308 {
309         int level;
310         int isa_irq;
311
312         pxa25x_init_irq();
313
314         /* setup ISA IRQs */
315         for (level = 0; level < ARRAY_SIZE(viper_isa_irqs); level++) {
316                 isa_irq = viper_bit_to_irq(level);
317                 irq_set_chip_and_handler(isa_irq, &viper_irq_chip,
318                                          handle_edge_irq);
319                 irq_clear_status_flags(isa_irq, IRQ_NOREQUEST | IRQ_NOPROBE);
320         }
321
322         irq_set_chained_handler(gpio_to_irq(VIPER_CPLD_GPIO),
323                                 viper_irq_handler);
324         irq_set_irq_type(gpio_to_irq(VIPER_CPLD_GPIO), IRQ_TYPE_EDGE_BOTH);
325 }
326
327 /* Flat Panel */
328 static struct pxafb_mode_info fb_mode_info[] = {
329         {
330                 .pixclock       = 157500,
331
332                 .xres           = 320,
333                 .yres           = 240,
334
335                 .bpp            = 16,
336
337                 .hsync_len      = 63,
338                 .left_margin    = 7,
339                 .right_margin   = 13,
340
341                 .vsync_len      = 20,
342                 .upper_margin   = 0,
343                 .lower_margin   = 0,
344
345                 .sync           = 0,
346         },
347 };
348
349 static struct pxafb_mach_info fb_info = {
350         .modes                  = fb_mode_info,
351         .num_modes              = 1,
352         .lcd_conn               = LCD_COLOR_TFT_16BPP | LCD_PCLK_EDGE_FALL,
353 };
354
355 static struct pwm_lookup viper_pwm_lookup[] = {
356         PWM_LOOKUP("pxa25x-pwm.0", 0, "pwm-backlight.0", NULL, 1000000,
357                    PWM_POLARITY_NORMAL),
358 };
359
360 static int viper_backlight_init(struct device *dev)
361 {
362         int ret;
363
364         /* GPIO9 and 10 control FB backlight. Initialise to off */
365         ret = gpio_request(VIPER_BCKLIGHT_EN_GPIO, "Backlight");
366         if (ret)
367                 goto err_request_bckl;
368
369         ret = gpio_request(VIPER_LCD_EN_GPIO, "LCD");
370         if (ret)
371                 goto err_request_lcd;
372
373         ret = gpio_direction_output(VIPER_BCKLIGHT_EN_GPIO, 0);
374         if (ret)
375                 goto err_dir;
376
377         ret = gpio_direction_output(VIPER_LCD_EN_GPIO, 0);
378         if (ret)
379                 goto err_dir;
380
381         return 0;
382
383 err_dir:
384         gpio_free(VIPER_LCD_EN_GPIO);
385 err_request_lcd:
386         gpio_free(VIPER_BCKLIGHT_EN_GPIO);
387 err_request_bckl:
388         dev_err(dev, "Failed to setup LCD GPIOs\n");
389
390         return ret;
391 }
392
393 static int viper_backlight_notify(struct device *dev, int brightness)
394 {
395         gpio_set_value(VIPER_LCD_EN_GPIO, !!brightness);
396         gpio_set_value(VIPER_BCKLIGHT_EN_GPIO, !!brightness);
397
398         return brightness;
399 }
400
401 static void viper_backlight_exit(struct device *dev)
402 {
403         gpio_free(VIPER_LCD_EN_GPIO);
404         gpio_free(VIPER_BCKLIGHT_EN_GPIO);
405 }
406
407 static struct platform_pwm_backlight_data viper_backlight_data = {
408         .max_brightness = 100,
409         .dft_brightness = 100,
410         .enable_gpio    = -1,
411         .init           = viper_backlight_init,
412         .notify         = viper_backlight_notify,
413         .exit           = viper_backlight_exit,
414 };
415
416 static struct platform_device viper_backlight_device = {
417         .name           = "pwm-backlight",
418         .dev            = {
419                 .parent         = &pxa25x_device_pwm0.dev,
420                 .platform_data  = &viper_backlight_data,
421         },
422 };
423
424 /* Ethernet */
425 static struct resource smc91x_resources[] = {
426         [0] = {
427                 .name   = "smc91x-regs",
428                 .start  = VIPER_ETH_PHYS + 0x300,
429                 .end    = VIPER_ETH_PHYS + 0x30f,
430                 .flags  = IORESOURCE_MEM,
431         },
432         [1] = {
433                 .start  = PXA_GPIO_TO_IRQ(VIPER_ETH_GPIO),
434                 .end    = PXA_GPIO_TO_IRQ(VIPER_ETH_GPIO),
435                 .flags  = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
436         },
437         [2] = {
438                 .name   = "smc91x-data32",
439                 .start  = VIPER_ETH_DATA_PHYS,
440                 .end    = VIPER_ETH_DATA_PHYS + 3,
441                 .flags  = IORESOURCE_MEM,
442         },
443 };
444
445 static struct smc91x_platdata viper_smc91x_info = {
446         .flags  = SMC91X_USE_16BIT | SMC91X_NOWAIT,
447         .leda   = RPC_LED_100_10,
448         .ledb   = RPC_LED_TX_RX,
449 };
450
451 static struct platform_device smc91x_device = {
452         .name           = "smc91x",
453         .id             = -1,
454         .num_resources  = ARRAY_SIZE(smc91x_resources),
455         .resource       = smc91x_resources,
456         .dev            = {
457                 .platform_data  = &viper_smc91x_info,
458         },
459 };
460
461 /* i2c */
462 static struct gpiod_lookup_table viper_i2c_gpiod_table = {
463         .dev_id         = "i2c-gpio.1",
464         .table          = {
465                 GPIO_LOOKUP_IDX("gpio-pxa", VIPER_RTC_I2C_SDA_GPIO,
466                                 NULL, 0, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
467                 GPIO_LOOKUP_IDX("gpio-pxa", VIPER_RTC_I2C_SCL_GPIO,
468                                 NULL, 1, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
469         },
470 };
471
472 static struct i2c_gpio_platform_data i2c_bus_data = {
473         .udelay  = 10,
474         .timeout = HZ,
475 };
476
477 static struct platform_device i2c_bus_device = {
478         .name           = "i2c-gpio",
479         .id             = 1, /* pxa2xx-i2c is bus 0, so start at 1 */
480         .dev = {
481                 .platform_data = &i2c_bus_data,
482         }
483 };
484
485 static struct i2c_board_info __initdata viper_i2c_devices[] = {
486         {
487                 I2C_BOARD_INFO("ds1338", 0x68),
488         },
489 };
490
491 /*
492  * Serial configuration:
493  * You can either have the standard PXA ports driven by the PXA driver,
494  * or all the ports (PXA + 16850) driven by the 8250 driver.
495  * Choose your poison.
496  */
497
498 static struct resource viper_serial_resources[] = {
499 #ifndef CONFIG_SERIAL_PXA
500         {
501                 .start  = 0x40100000,
502                 .end    = 0x4010001f,
503                 .flags  = IORESOURCE_MEM,
504         },
505         {
506                 .start  = 0x40200000,
507                 .end    = 0x4020001f,
508                 .flags  = IORESOURCE_MEM,
509         },
510         {
511                 .start  = 0x40700000,
512                 .end    = 0x4070001f,
513                 .flags  = IORESOURCE_MEM,
514         },
515         {
516                 .start  = VIPER_UARTA_PHYS,
517                 .end    = VIPER_UARTA_PHYS + 0xf,
518                 .flags  = IORESOURCE_MEM,
519         },
520         {
521                 .start  = VIPER_UARTB_PHYS,
522                 .end    = VIPER_UARTB_PHYS + 0xf,
523                 .flags  = IORESOURCE_MEM,
524         },
525 #else
526         {
527                 0,
528         },
529 #endif
530 };
531
532 static struct plat_serial8250_port serial_platform_data[] = {
533 #ifndef CONFIG_SERIAL_PXA
534         /* Internal UARTs */
535         {
536                 .membase        = (void *)&FFUART,
537                 .mapbase        = __PREG(FFUART),
538                 .irq            = IRQ_FFUART,
539                 .uartclk        = 921600 * 16,
540                 .regshift       = 2,
541                 .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
542                 .iotype         = UPIO_MEM,
543         },
544         {
545                 .membase        = (void *)&BTUART,
546                 .mapbase        = __PREG(BTUART),
547                 .irq            = IRQ_BTUART,
548                 .uartclk        = 921600 * 16,
549                 .regshift       = 2,
550                 .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
551                 .iotype         = UPIO_MEM,
552         },
553         {
554                 .membase        = (void *)&STUART,
555                 .mapbase        = __PREG(STUART),
556                 .irq            = IRQ_STUART,
557                 .uartclk        = 921600 * 16,
558                 .regshift       = 2,
559                 .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
560                 .iotype         = UPIO_MEM,
561         },
562         /* External UARTs */
563         {
564                 .mapbase        = VIPER_UARTA_PHYS,
565                 .irq            = PXA_GPIO_TO_IRQ(VIPER_UARTA_GPIO),
566                 .irqflags       = IRQF_TRIGGER_RISING,
567                 .uartclk        = 1843200,
568                 .regshift       = 1,
569                 .iotype         = UPIO_MEM,
570                 .flags          = UPF_BOOT_AUTOCONF | UPF_IOREMAP |
571                                   UPF_SKIP_TEST,
572         },
573         {
574                 .mapbase        = VIPER_UARTB_PHYS,
575                 .irq            = PXA_GPIO_TO_IRQ(VIPER_UARTB_GPIO),
576                 .irqflags       = IRQF_TRIGGER_RISING,
577                 .uartclk        = 1843200,
578                 .regshift       = 1,
579                 .iotype         = UPIO_MEM,
580                 .flags          = UPF_BOOT_AUTOCONF | UPF_IOREMAP |
581                                   UPF_SKIP_TEST,
582         },
583 #endif
584         { },
585 };
586
587 static struct platform_device serial_device = {
588         .name                   = "serial8250",
589         .id                     = 0,
590         .dev                    = {
591                 .platform_data  = serial_platform_data,
592         },
593         .num_resources          = ARRAY_SIZE(viper_serial_resources),
594         .resource               = viper_serial_resources,
595 };
596
597 /* USB */
598 static void isp116x_delay(struct device *dev, int delay)
599 {
600         ndelay(delay);
601 }
602
603 static struct resource isp116x_resources[] = {
604         [0] = { /* DATA */
605                 .start  = VIPER_USB_PHYS + 0,
606                 .end    = VIPER_USB_PHYS + 1,
607                 .flags  = IORESOURCE_MEM,
608         },
609         [1] = { /* ADDR */
610                 .start  = VIPER_USB_PHYS + 2,
611                 .end    = VIPER_USB_PHYS + 3,
612                 .flags  = IORESOURCE_MEM,
613         },
614         [2] = {
615                 .start  = PXA_GPIO_TO_IRQ(VIPER_USB_GPIO),
616                 .end    = PXA_GPIO_TO_IRQ(VIPER_USB_GPIO),
617                 .flags  = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
618         },
619 };
620
621 /* (DataBusWidth16|AnalogOCEnable|DREQOutputPolarity|DownstreamPort15KRSel ) */
622 static struct isp116x_platform_data isp116x_platform_data = {
623         /* Enable internal resistors on downstream ports */
624         .sel15Kres              = 1,
625         /* On-chip overcurrent protection */
626         .oc_enable              = 1,
627         /* INT output polarity */
628         .int_act_high           = 1,
629         /* INT edge or level triggered */
630         .int_edge_triggered     = 0,
631
632         /* WAKEUP pin connected - NOT SUPPORTED  */
633         /* .remote_wakeup_connected = 0, */
634         /* Wakeup by devices on usb bus enabled */
635         .remote_wakeup_enable   = 0,
636         .delay                  = isp116x_delay,
637 };
638
639 static struct platform_device isp116x_device = {
640         .name                   = "isp116x-hcd",
641         .id                     = -1,
642         .num_resources          = ARRAY_SIZE(isp116x_resources),
643         .resource               = isp116x_resources,
644         .dev                    = {
645                 .platform_data  = &isp116x_platform_data,
646         },
647
648 };
649
650 /* MTD */
651 static struct resource mtd_resources[] = {
652         [0] = { /* RedBoot config + filesystem flash */
653                 .start  = VIPER_FLASH_PHYS,
654                 .end    = VIPER_FLASH_PHYS + SZ_32M - 1,
655                 .flags  = IORESOURCE_MEM,
656         },
657         [1] = { /* Boot flash */
658                 .start  = VIPER_BOOT_PHYS,
659                 .end    = VIPER_BOOT_PHYS + SZ_1M - 1,
660                 .flags  = IORESOURCE_MEM,
661         },
662         [2] = { /*
663                  * SRAM size is actually 256KB, 8bits, with a sparse mapping
664                  * (each byte is on a 16bit boundary).
665                  */
666                 .start  = _VIPER_SRAM_BASE,
667                 .end    = _VIPER_SRAM_BASE + SZ_512K - 1,
668                 .flags  = IORESOURCE_MEM,
669         },
670 };
671
672 static struct mtd_partition viper_boot_flash_partition = {
673         .name           = "RedBoot",
674         .size           = SZ_1M,
675         .offset         = 0,
676         .mask_flags     = MTD_WRITEABLE,        /* force R/O */
677 };
678
679 static struct physmap_flash_data viper_flash_data[] = {
680         [0] = {
681                 .width          = 2,
682                 .parts          = NULL,
683                 .nr_parts       = 0,
684         },
685         [1] = {
686                 .width          = 2,
687                 .parts          = &viper_boot_flash_partition,
688                 .nr_parts       = 1,
689         },
690 };
691
692 static struct platform_device viper_mtd_devices[] = {
693         [0] = {
694                 .name           = "physmap-flash",
695                 .id             = 0,
696                 .dev            = {
697                         .platform_data  = &viper_flash_data[0],
698                 },
699                 .resource       = &mtd_resources[0],
700                 .num_resources  = 1,
701         },
702         [1] = {
703                 .name           = "physmap-flash",
704                 .id             = 1,
705                 .dev            = {
706                         .platform_data  = &viper_flash_data[1],
707                 },
708                 .resource       = &mtd_resources[1],
709                 .num_resources  = 1,
710         },
711 };
712
713 static struct platform_device *viper_devs[] __initdata = {
714         &smc91x_device,
715         &i2c_bus_device,
716         &serial_device,
717         &isp116x_device,
718         &viper_mtd_devices[0],
719         &viper_mtd_devices[1],
720         &viper_backlight_device,
721         &viper_pcmcia_device,
722 };
723
724 static mfp_cfg_t viper_pin_config[] __initdata = {
725         /* Chip selects */
726         GPIO15_nCS_1,
727         GPIO78_nCS_2,
728         GPIO79_nCS_3,
729         GPIO80_nCS_4,
730         GPIO33_nCS_5,
731
732         /* AC97 */
733         GPIO28_AC97_BITCLK,
734         GPIO29_AC97_SDATA_IN_0,
735         GPIO30_AC97_SDATA_OUT,
736         GPIO31_AC97_SYNC,
737
738         /* FP Backlight */
739         GPIO9_GPIO,                             /* VIPER_BCKLIGHT_EN_GPIO */
740         GPIO10_GPIO,                            /* VIPER_LCD_EN_GPIO */
741         GPIO16_PWM0_OUT,
742
743         /* Ethernet PHY Ready */
744         GPIO18_RDY,
745
746         /* Serial shutdown */
747         GPIO12_GPIO | MFP_LPM_DRIVE_HIGH,       /* VIPER_UART_SHDN_GPIO */
748
749         /* Compact-Flash / PC104 */
750         GPIO48_nPOE,
751         GPIO49_nPWE,
752         GPIO50_nPIOR,
753         GPIO51_nPIOW,
754         GPIO52_nPCE_1,
755         GPIO53_nPCE_2,
756         GPIO54_nPSKTSEL,
757         GPIO55_nPREG,
758         GPIO56_nPWAIT,
759         GPIO57_nIOIS16,
760         GPIO8_GPIO,                             /* VIPER_CF_RDY_GPIO */
761         GPIO32_GPIO,                            /* VIPER_CF_CD_GPIO */
762         GPIO82_GPIO,                            /* VIPER_CF_POWER_GPIO */
763
764         /* Integrated UPS control */
765         GPIO20_GPIO,                            /* VIPER_UPS_GPIO */
766
767         /* Vcc regulator control */
768         GPIO6_GPIO,                             /* VIPER_PSU_DATA_GPIO */
769         GPIO11_GPIO,                            /* VIPER_PSU_CLK_GPIO */
770         GPIO19_GPIO,                            /* VIPER_PSU_nCS_LD_GPIO */
771
772         /* i2c busses */
773         GPIO26_GPIO,                            /* VIPER_TPM_I2C_SDA_GPIO */
774         GPIO27_GPIO,                            /* VIPER_TPM_I2C_SCL_GPIO */
775         GPIO83_GPIO,                            /* VIPER_RTC_I2C_SDA_GPIO */
776         GPIO84_GPIO,                            /* VIPER_RTC_I2C_SCL_GPIO */
777
778         /* PC/104 Interrupt */
779         GPIO1_GPIO | WAKEUP_ON_EDGE_RISE,       /* VIPER_CPLD_GPIO */
780 };
781
782 static unsigned long viper_tpm;
783
784 static int __init viper_tpm_setup(char *str)
785 {
786         return kstrtoul(str, 10, &viper_tpm) >= 0;
787 }
788
789 __setup("tpm=", viper_tpm_setup);
790
791 struct gpiod_lookup_table viper_tpm_i2c_gpiod_table = {
792         .dev_id = "i2c-gpio.2",
793         .table = {
794                 GPIO_LOOKUP_IDX("gpio-pxa", VIPER_TPM_I2C_SDA_GPIO,
795                                 NULL, 0, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
796                 GPIO_LOOKUP_IDX("gpio-pxa", VIPER_TPM_I2C_SCL_GPIO,
797                                 NULL, 1, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
798         },
799 };
800
801 static void __init viper_tpm_init(void)
802 {
803         struct platform_device *tpm_device;
804         struct i2c_gpio_platform_data i2c_tpm_data = {
805                 .udelay  = 10,
806                 .timeout = HZ,
807         };
808         char *errstr;
809
810         /* Allocate TPM i2c bus if requested */
811         if (!viper_tpm)
812                 return;
813
814         gpiod_add_lookup_table(&viper_tpm_i2c_gpiod_table);
815         tpm_device = platform_device_alloc("i2c-gpio", 2);
816         if (tpm_device) {
817                 if (!platform_device_add_data(tpm_device,
818                                               &i2c_tpm_data,
819                                               sizeof(i2c_tpm_data))) {
820                         if (platform_device_add(tpm_device)) {
821                                 errstr = "register TPM i2c bus";
822                                 goto error_free_tpm;
823                         }
824                 } else {
825                         errstr = "allocate TPM i2c bus data";
826                         goto error_free_tpm;
827                 }
828         } else {
829                 errstr = "allocate TPM i2c device";
830                 goto error_tpm;
831         }
832
833         return;
834
835 error_free_tpm:
836         kfree(tpm_device);
837 error_tpm:
838         pr_err("viper: Couldn't %s, giving up\n", errstr);
839 }
840
841 static void __init viper_init_vcore_gpios(void)
842 {
843         if (gpio_request(VIPER_PSU_DATA_GPIO, "PSU data"))
844                 goto err_request_data;
845
846         if (gpio_request(VIPER_PSU_CLK_GPIO, "PSU clock"))
847                 goto err_request_clk;
848
849         if (gpio_request(VIPER_PSU_nCS_LD_GPIO, "PSU cs"))
850                 goto err_request_cs;
851
852         if (gpio_direction_output(VIPER_PSU_DATA_GPIO, 0) ||
853             gpio_direction_output(VIPER_PSU_CLK_GPIO, 0) ||
854             gpio_direction_output(VIPER_PSU_nCS_LD_GPIO, 0))
855                 goto err_dir;
856
857         /* c/should assume redboot set the correct level ??? */
858         viper_set_core_cpu_voltage(get_clk_frequency_khz(0), 1);
859
860         return;
861
862 err_dir:
863         gpio_free(VIPER_PSU_nCS_LD_GPIO);
864 err_request_cs:
865         gpio_free(VIPER_PSU_CLK_GPIO);
866 err_request_clk:
867         gpio_free(VIPER_PSU_DATA_GPIO);
868 err_request_data:
869         pr_err("viper: Failed to setup vcore control GPIOs\n");
870 }
871
872 static void __init viper_init_serial_gpio(void)
873 {
874         if (gpio_request(VIPER_UART_SHDN_GPIO, "UARTs shutdown"))
875                 goto err_request;
876
877         if (gpio_direction_output(VIPER_UART_SHDN_GPIO, 0))
878                 goto err_dir;
879
880         return;
881
882 err_dir:
883         gpio_free(VIPER_UART_SHDN_GPIO);
884 err_request:
885         pr_err("viper: Failed to setup UART shutdown GPIO\n");
886 }
887
888 #ifdef CONFIG_CPU_FREQ
889 static int viper_cpufreq_notifier(struct notifier_block *nb,
890                                   unsigned long val, void *data)
891 {
892         struct cpufreq_freqs *freq = data;
893
894         /* TODO: Adjust timings??? */
895
896         switch (val) {
897         case CPUFREQ_PRECHANGE:
898                 if (freq->old < freq->new) {
899                         /* we are getting faster so raise the voltage
900                          * before we change freq */
901                         viper_set_core_cpu_voltage(freq->new, 0);
902                 }
903                 break;
904         case CPUFREQ_POSTCHANGE:
905                 if (freq->old > freq->new) {
906                         /* we are slowing down so drop the power
907                          * after we change freq */
908                         viper_set_core_cpu_voltage(freq->new, 0);
909                 }
910                 break;
911         default:
912                 /* ignore */
913                 break;
914         }
915
916         return 0;
917 }
918
919 static struct notifier_block viper_cpufreq_notifier_block = {
920         .notifier_call  = viper_cpufreq_notifier
921 };
922
923 static void __init viper_init_cpufreq(void)
924 {
925         if (cpufreq_register_notifier(&viper_cpufreq_notifier_block,
926                                       CPUFREQ_TRANSITION_NOTIFIER))
927                 pr_err("viper: Failed to setup cpufreq notifier\n");
928 }
929 #else
930 static inline void viper_init_cpufreq(void) {}
931 #endif
932
933 static void viper_power_off(void)
934 {
935         pr_notice("Shutting off UPS\n");
936         gpio_set_value(VIPER_UPS_GPIO, 1);
937         /* Spin to death... */
938         while (1);
939 }
940
941 static void __init viper_init(void)
942 {
943         u8 version;
944
945         pm_power_off = viper_power_off;
946
947         pxa2xx_mfp_config(ARRAY_AND_SIZE(viper_pin_config));
948
949         pxa_set_ffuart_info(NULL);
950         pxa_set_btuart_info(NULL);
951         pxa_set_stuart_info(NULL);
952
953         /* Wake-up serial console */
954         viper_init_serial_gpio();
955
956         pxa_set_fb_info(NULL, &fb_info);
957
958         /* v1 hardware cannot use the datacs line */
959         version = viper_hw_version();
960         if (version == 0)
961                 smc91x_device.num_resources--;
962
963         pxa_set_i2c_info(NULL);
964         gpiod_add_lookup_table(&viper_i2c_gpiod_table);
965         pwm_add_table(viper_pwm_lookup, ARRAY_SIZE(viper_pwm_lookup));
966         platform_add_devices(viper_devs, ARRAY_SIZE(viper_devs));
967
968         viper_init_vcore_gpios();
969         viper_init_cpufreq();
970
971         register_syscore_ops(&viper_cpu_syscore_ops);
972
973         if (version) {
974                 pr_info("viper: hardware v%di%d detected. "
975                         "CPLD revision %d.\n",
976                         VIPER_BOARD_VERSION(version),
977                         VIPER_BOARD_ISSUE(version),
978                         VIPER_CPLD_REVISION(version));
979                 system_rev = (VIPER_BOARD_VERSION(version) << 8) |
980                              (VIPER_BOARD_ISSUE(version) << 4) |
981                              VIPER_CPLD_REVISION(version);
982         } else {
983                 pr_info("viper: No version register.\n");
984         }
985
986         i2c_register_board_info(1, ARRAY_AND_SIZE(viper_i2c_devices));
987
988         viper_tpm_init();
989         pxa_set_ac97_info(NULL);
990 }
991
992 static struct map_desc viper_io_desc[] __initdata = {
993         {
994                 .virtual = VIPER_CPLD_BASE,
995                 .pfn     = __phys_to_pfn(VIPER_CPLD_PHYS),
996                 .length  = 0x00300000,
997                 .type    = MT_DEVICE,
998         },
999         {
1000                 .virtual = VIPER_PC104IO_BASE,
1001                 .pfn     = __phys_to_pfn(0x30000000),
1002                 .length  = 0x00800000,
1003                 .type    = MT_DEVICE,
1004         },
1005 };
1006
1007 static void __init viper_map_io(void)
1008 {
1009         pxa25x_map_io();
1010
1011         iotable_init(viper_io_desc, ARRAY_SIZE(viper_io_desc));
1012
1013         PCFR |= PCFR_OPDE;
1014 }
1015
1016 MACHINE_START(VIPER, "Arcom/Eurotech VIPER SBC")
1017         /* Maintainer: Marc Zyngier <maz@misterjones.org> */
1018         .atag_offset    = 0x100,
1019         .map_io         = viper_map_io,
1020         .nr_irqs        = PXA_NR_IRQS,
1021         .init_irq       = viper_init_irq,
1022         .handle_irq     = pxa25x_handle_irq,
1023         .init_time      = pxa_timer_init,
1024         .init_machine   = viper_init,
1025         .restart        = pxa_restart,
1026 MACHINE_END