Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
[linux-2.6] / 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/interrupt.h>
31 #include <linux/major.h>
32 #include <linux/module.h>
33 #include <linux/pm.h>
34 #include <linux/sched.h>
35 #include <linux/gpio.h>
36 #include <linux/i2c-gpio.h>
37 #include <linux/serial_8250.h>
38 #include <linux/smc91x.h>
39 #include <linux/pwm_backlight.h>
40 #include <linux/usb/isp116x.h>
41 #include <linux/mtd/mtd.h>
42 #include <linux/mtd/partitions.h>
43 #include <linux/mtd/physmap.h>
44
45 #include <mach/pxa-regs.h>
46 #include <mach/pxa2xx-regs.h>
47 #include <mach/bitfield.h>
48 #include <mach/audio.h>
49 #include <mach/pxafb.h>
50 #include <mach/mfp-pxa25x.h>
51 #include <mach/i2c.h>
52 #include <mach/viper.h>
53
54 #include <asm/setup.h>
55 #include <asm/mach-types.h>
56 #include <asm/irq.h>
57 #include <asm/sizes.h>
58
59 #include <asm/mach/arch.h>
60 #include <asm/mach/map.h>
61 #include <asm/mach/irq.h>
62
63 #include "generic.h"
64 #include "devices.h"
65
66 static unsigned int icr;
67
68 static void viper_icr_set_bit(unsigned int bit)
69 {
70         icr |= bit;
71         VIPER_ICR = icr;
72 }
73
74 static void viper_icr_clear_bit(unsigned int bit)
75 {
76         icr &= ~bit;
77         VIPER_ICR = icr;
78 }
79
80 /* This function is used from the pcmcia module to reset the CF */
81 void viper_cf_rst(int state)
82 {
83         if (state)
84                 viper_icr_set_bit(VIPER_ICR_CF_RST);
85         else
86                 viper_icr_clear_bit(VIPER_ICR_CF_RST);
87 }
88 EXPORT_SYMBOL(viper_cf_rst);
89
90 /*
91  * The CPLD version register was not present on VIPER boards prior to
92  * v2i1. On v1 boards where the version register is not present we
93  * will just read back the previous value from the databus.
94  *
95  * Therefore we do two reads. The first time we write 0 to the
96  * (read-only) register before reading and the second time we write
97  * 0xff first. If the two reads do not match or they read back as 0xff
98  * or 0x00 then we have version 1 hardware.
99  */
100 static u8 viper_hw_version(void)
101 {
102         u8 v1, v2;
103         unsigned long flags;
104
105         local_irq_save(flags);
106
107         VIPER_VERSION = 0;
108         v1 = VIPER_VERSION;
109         VIPER_VERSION = 0xff;
110         v2 = VIPER_VERSION;
111
112         v1 = (v1 != v2 || v1 == 0xff) ? 0 : v1;
113
114         local_irq_restore(flags);
115         return v1;
116 }
117
118 /* CPU sysdev */
119 static int viper_cpu_suspend(struct sys_device *sysdev, pm_message_t state)
120 {
121         viper_icr_set_bit(VIPER_ICR_R_DIS);
122         return 0;
123 }
124
125 static int viper_cpu_resume(struct sys_device *sysdev)
126 {
127         viper_icr_clear_bit(VIPER_ICR_R_DIS);
128         return 0;
129 }
130
131 static struct sysdev_driver viper_cpu_sysdev_driver = {
132         .suspend        = viper_cpu_suspend,
133         .resume         = viper_cpu_resume,
134 };
135
136 static unsigned int current_voltage_divisor;
137
138 /*
139  * If force is not true then step from existing to new divisor. If
140  * force is true then jump straight to the new divisor. Stepping is
141  * used because if the jump in voltage is too large, the VCC can dip
142  * too low and the regulator cuts out.
143  *
144  * force can be used to initialize the divisor to a know state by
145  * setting the value for the current clock speed, since we are already
146  * running at that speed we know the voltage should be pretty close so
147  * the jump won't be too large
148  */
149 static void viper_set_core_cpu_voltage(unsigned long khz, int force)
150 {
151         int i = 0;
152         unsigned int divisor = 0;
153         const char *v;
154
155         if (khz < 200000) {
156                 v = "1.0"; divisor = 0xfff;
157         } else if (khz < 300000) {
158                 v = "1.1"; divisor = 0xde5;
159         } else {
160                 v = "1.3"; divisor = 0x325;
161         }
162
163         pr_debug("viper: setting CPU core voltage to %sV at %d.%03dMHz\n",
164                  v, (int)khz / 1000, (int)khz % 1000);
165
166 #define STEP 0x100
167         do {
168                 int step;
169
170                 if (force)
171                         step = divisor;
172                 else if (current_voltage_divisor < divisor - STEP)
173                         step = current_voltage_divisor + STEP;
174                 else if (current_voltage_divisor > divisor + STEP)
175                         step = current_voltage_divisor - STEP;
176                 else
177                         step = divisor;
178                 force = 0;
179
180                 gpio_set_value(VIPER_PSU_CLK_GPIO, 0);
181                 gpio_set_value(VIPER_PSU_nCS_LD_GPIO, 0);
182
183                 for (i = 1 << 11 ; i > 0 ; i >>= 1) {
184                         udelay(1);
185
186                         gpio_set_value(VIPER_PSU_DATA_GPIO, step & i);
187                         udelay(1);
188
189                         gpio_set_value(VIPER_PSU_CLK_GPIO, 1);
190                         udelay(1);
191
192                         gpio_set_value(VIPER_PSU_CLK_GPIO, 0);
193                 }
194                 udelay(1);
195
196                 gpio_set_value(VIPER_PSU_nCS_LD_GPIO, 1);
197                 udelay(1);
198
199                 gpio_set_value(VIPER_PSU_nCS_LD_GPIO, 0);
200
201                 current_voltage_divisor = step;
202         } while (current_voltage_divisor != divisor);
203 }
204
205 /* Interrupt handling */
206 static unsigned long viper_irq_enabled_mask;
207 static const int viper_isa_irqs[] = { 3, 4, 5, 6, 7, 10, 11, 12, 9, 14, 15 };
208 static const int viper_isa_irq_map[] = {
209         0,              /* ISA irq #0, invalid */
210         0,              /* ISA irq #1, invalid */
211         0,              /* ISA irq #2, invalid */
212         1 << 0,         /* ISA irq #3 */
213         1 << 1,         /* ISA irq #4 */
214         1 << 2,         /* ISA irq #5 */
215         1 << 3,         /* ISA irq #6 */
216         1 << 4,         /* ISA irq #7 */
217         0,              /* ISA irq #8, invalid */
218         1 << 8,         /* ISA irq #9 */
219         1 << 5,         /* ISA irq #10 */
220         1 << 6,         /* ISA irq #11 */
221         1 << 7,         /* ISA irq #12 */
222         0,              /* ISA irq #13, invalid */
223         1 << 9,         /* ISA irq #14 */
224         1 << 10,        /* ISA irq #15 */
225 };
226
227 static inline int viper_irq_to_bitmask(unsigned int irq)
228 {
229         return viper_isa_irq_map[irq - PXA_ISA_IRQ(0)];
230 }
231
232 static inline int viper_bit_to_irq(int bit)
233 {
234         return viper_isa_irqs[bit] + PXA_ISA_IRQ(0);
235 }
236
237 static void viper_ack_irq(unsigned int irq)
238 {
239         int viper_irq = viper_irq_to_bitmask(irq);
240
241         if (viper_irq & 0xff)
242                 VIPER_LO_IRQ_STATUS = viper_irq;
243         else
244                 VIPER_HI_IRQ_STATUS = (viper_irq >> 8);
245 }
246
247 static void viper_mask_irq(unsigned int irq)
248 {
249         viper_irq_enabled_mask &= ~(viper_irq_to_bitmask(irq));
250 }
251
252 static void viper_unmask_irq(unsigned int irq)
253 {
254         viper_irq_enabled_mask |= viper_irq_to_bitmask(irq);
255 }
256
257 static inline unsigned long viper_irq_pending(void)
258 {
259         return (VIPER_HI_IRQ_STATUS << 8 | VIPER_LO_IRQ_STATUS) &
260                         viper_irq_enabled_mask;
261 }
262
263 static void viper_irq_handler(unsigned int irq, struct irq_desc *desc)
264 {
265         unsigned long pending;
266
267         pending = viper_irq_pending();
268         do {
269                 /* we're in a chained irq handler,
270                  * so ack the interrupt by hand */
271                 GEDR(VIPER_CPLD_GPIO) = GPIO_bit(VIPER_CPLD_GPIO);
272
273                 if (likely(pending)) {
274                         irq = viper_bit_to_irq(__ffs(pending));
275                         generic_handle_irq(irq);
276                 }
277                 pending = viper_irq_pending();
278         } while (pending);
279 }
280
281 static struct irq_chip viper_irq_chip = {
282         .name   = "ISA",
283         .ack    = viper_ack_irq,
284         .mask   = viper_mask_irq,
285         .unmask = viper_unmask_irq
286 };
287
288 static void __init viper_init_irq(void)
289 {
290         int level;
291         int isa_irq;
292
293         pxa25x_init_irq();
294
295         /* setup ISA IRQs */
296         for (level = 0; level < ARRAY_SIZE(viper_isa_irqs); level++) {
297                 isa_irq = viper_bit_to_irq(level);
298                 set_irq_chip(isa_irq, &viper_irq_chip);
299                 set_irq_handler(isa_irq, handle_edge_irq);
300                 set_irq_flags(isa_irq, IRQF_VALID | IRQF_PROBE);
301         }
302
303         set_irq_chained_handler(gpio_to_irq(VIPER_CPLD_GPIO),
304                                 viper_irq_handler);
305         set_irq_type(gpio_to_irq(VIPER_CPLD_GPIO), IRQ_TYPE_EDGE_BOTH);
306
307 #ifndef CONFIG_SERIAL_PXA
308         /*
309          * 8250 doesn't support IRQ_TYPE being passed as part
310          * of the plat_serial8250_port structure...
311          */
312         set_irq_type(gpio_to_irq(VIPER_UARTA_GPIO), IRQ_TYPE_EDGE_RISING);
313         set_irq_type(gpio_to_irq(VIPER_UARTB_GPIO), IRQ_TYPE_EDGE_RISING);
314 #endif
315 }
316
317 /* Flat Panel */
318 static struct pxafb_mode_info fb_mode_info[] = {
319         {
320                 .pixclock       = 157500,
321
322                 .xres           = 320,
323                 .yres           = 240,
324
325                 .bpp            = 16,
326
327                 .hsync_len      = 63,
328                 .left_margin    = 7,
329                 .right_margin   = 13,
330
331                 .vsync_len      = 20,
332                 .upper_margin   = 0,
333                 .lower_margin   = 0,
334
335                 .sync           = 0,
336         },
337 };
338
339 static struct pxafb_mach_info fb_info = {
340         .modes                  = fb_mode_info,
341         .num_modes              = 1,
342         .lcd_conn               = LCD_COLOR_TFT_16BPP | LCD_PCLK_EDGE_FALL,
343 };
344
345 static int viper_backlight_init(struct device *dev)
346 {
347         int ret;
348
349         /* GPIO9 and 10 control FB backlight. Initialise to off */
350         ret = gpio_request(VIPER_BCKLIGHT_EN_GPIO, "Backlight");
351         if (ret)
352                 goto err_request_bckl;
353
354         ret = gpio_request(VIPER_LCD_EN_GPIO, "LCD");
355         if (ret)
356                 goto err_request_lcd;
357
358         ret = gpio_direction_output(VIPER_BCKLIGHT_EN_GPIO, 0);
359         if (ret)
360                 goto err_dir;
361
362         ret = gpio_direction_output(VIPER_LCD_EN_GPIO, 0);
363         if (ret)
364                 goto err_dir;
365
366         return 0;
367
368 err_dir:
369         gpio_free(VIPER_LCD_EN_GPIO);
370 err_request_lcd:
371         gpio_free(VIPER_BCKLIGHT_EN_GPIO);
372 err_request_bckl:
373         dev_err(dev, "Failed to setup LCD GPIOs\n");
374
375         return ret;
376 }
377
378 static int viper_backlight_notify(int brightness)
379 {
380         gpio_set_value(VIPER_LCD_EN_GPIO, !!brightness);
381         gpio_set_value(VIPER_BCKLIGHT_EN_GPIO, !!brightness);
382
383         return brightness;
384 }
385
386 static void viper_backlight_exit(struct device *dev)
387 {
388         gpio_free(VIPER_LCD_EN_GPIO);
389         gpio_free(VIPER_BCKLIGHT_EN_GPIO);
390 }
391
392 static struct platform_pwm_backlight_data viper_backlight_data = {
393         .pwm_id         = 0,
394         .max_brightness = 100,
395         .dft_brightness = 100,
396         .pwm_period_ns  = 1000000,
397         .init           = viper_backlight_init,
398         .notify         = viper_backlight_notify,
399         .exit           = viper_backlight_exit,
400 };
401
402 static struct platform_device viper_backlight_device = {
403         .name           = "pwm-backlight",
404         .dev            = {
405                 .parent         = &pxa25x_device_pwm0.dev,
406                 .platform_data  = &viper_backlight_data,
407         },
408 };
409
410 /* Ethernet */
411 static struct resource smc91x_resources[] = {
412         [0] = {
413                 .name   = "smc91x-regs",
414                 .start  = VIPER_ETH_PHYS + 0x300,
415                 .end    = VIPER_ETH_PHYS + 0x30f,
416                 .flags  = IORESOURCE_MEM,
417         },
418         [1] = {
419                 .start  = gpio_to_irq(VIPER_ETH_GPIO),
420                 .end    = gpio_to_irq(VIPER_ETH_GPIO),
421                 .flags  = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
422         },
423         [2] = {
424                 .name   = "smc91x-data32",
425                 .start  = VIPER_ETH_DATA_PHYS,
426                 .end    = VIPER_ETH_DATA_PHYS + 3,
427                 .flags  = IORESOURCE_MEM,
428         },
429 };
430
431 static struct smc91x_platdata viper_smc91x_info = {
432         .flags  = SMC91X_USE_16BIT | SMC91X_NOWAIT,
433         .leda   = RPC_LED_100_10,
434         .ledb   = RPC_LED_TX_RX,
435 };
436
437 static struct platform_device smc91x_device = {
438         .name           = "smc91x",
439         .id             = -1,
440         .num_resources  = ARRAY_SIZE(smc91x_resources),
441         .resource       = smc91x_resources,
442         .dev            = {
443                 .platform_data  = &viper_smc91x_info,
444         },
445 };
446
447 /* i2c */
448 static struct i2c_gpio_platform_data i2c_bus_data = {
449         .sda_pin = VIPER_RTC_I2C_SDA_GPIO,
450         .scl_pin = VIPER_RTC_I2C_SCL_GPIO,
451         .udelay  = 10,
452         .timeout = 100,
453 };
454
455 static struct platform_device i2c_bus_device = {
456         .name           = "i2c-gpio",
457         .id             = 1, /* pxa2xx-i2c is bus 0, so start at 1 */
458         .dev = {
459                 .platform_data = &i2c_bus_data,
460         }
461 };
462
463 static struct i2c_board_info __initdata viper_i2c_devices[] = {
464         {
465                 I2C_BOARD_INFO("ds1338", 0x68),
466         },
467 };
468
469 /*
470  * Serial configuration:
471  * You can either have the standard PXA ports driven by the PXA driver,
472  * or all the ports (PXA + 16850) driven by the 8250 driver.
473  * Choose your poison.
474  */
475
476 static struct resource viper_serial_resources[] = {
477 #ifndef CONFIG_SERIAL_PXA
478         {
479                 .start  = 0x40100000,
480                 .end    = 0x4010001f,
481                 .flags  = IORESOURCE_MEM,
482         },
483         {
484                 .start  = 0x40200000,
485                 .end    = 0x4020001f,
486                 .flags  = IORESOURCE_MEM,
487         },
488         {
489                 .start  = 0x40700000,
490                 .end    = 0x4070001f,
491                 .flags  = IORESOURCE_MEM,
492         },
493         {
494                 .start  = VIPER_UARTA_PHYS,
495                 .end    = VIPER_UARTA_PHYS + 0xf,
496                 .flags  = IORESOURCE_MEM,
497         },
498         {
499                 .start  = VIPER_UARTB_PHYS,
500                 .end    = VIPER_UARTB_PHYS + 0xf,
501                 .flags  = IORESOURCE_MEM,
502         },
503 #else
504         {
505                 0,
506         },
507 #endif
508 };
509
510 static struct plat_serial8250_port serial_platform_data[] = {
511 #ifndef CONFIG_SERIAL_PXA
512         /* Internal UARTs */
513         {
514                 .membase        = (void *)&FFUART,
515                 .mapbase        = __PREG(FFUART),
516                 .irq            = IRQ_FFUART,
517                 .uartclk        = 921600 * 16,
518                 .regshift       = 2,
519                 .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
520                 .iotype         = UPIO_MEM,
521         },
522         {
523                 .membase        = (void *)&BTUART,
524                 .mapbase        = __PREG(BTUART),
525                 .irq            = IRQ_BTUART,
526                 .uartclk        = 921600 * 16,
527                 .regshift       = 2,
528                 .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
529                 .iotype         = UPIO_MEM,
530         },
531         {
532                 .membase        = (void *)&STUART,
533                 .mapbase        = __PREG(STUART),
534                 .irq            = IRQ_STUART,
535                 .uartclk        = 921600 * 16,
536                 .regshift       = 2,
537                 .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
538                 .iotype         = UPIO_MEM,
539         },
540         /* External UARTs */
541         {
542                 .mapbase        = VIPER_UARTA_PHYS,
543                 .irq            = gpio_to_irq(VIPER_UARTA_GPIO),
544                 .uartclk        = 1843200,
545                 .regshift       = 1,
546                 .iotype         = UPIO_MEM,
547                 .flags          = UPF_BOOT_AUTOCONF | UPF_IOREMAP |
548                                   UPF_SKIP_TEST,
549         },
550         {
551                 .mapbase        = VIPER_UARTB_PHYS,
552                 .irq            = gpio_to_irq(VIPER_UARTB_GPIO),
553                 .uartclk        = 1843200,
554                 .regshift       = 1,
555                 .iotype         = UPIO_MEM,
556                 .flags          = UPF_BOOT_AUTOCONF | UPF_IOREMAP |
557                                   UPF_SKIP_TEST,
558         },
559 #endif
560         { },
561 };
562
563 static struct platform_device serial_device = {
564         .name                   = "serial8250",
565         .id                     = 0,
566         .dev                    = {
567                 .platform_data  = serial_platform_data,
568         },
569         .num_resources          = ARRAY_SIZE(viper_serial_resources),
570         .resource               = viper_serial_resources,
571 };
572
573 /* USB */
574 static void isp116x_delay(struct device *dev, int delay)
575 {
576         ndelay(delay);
577 }
578
579 static struct resource isp116x_resources[] = {
580         [0] = { /* DATA */
581                 .start  = VIPER_USB_PHYS + 0,
582                 .end    = VIPER_USB_PHYS + 1,
583                 .flags  = IORESOURCE_MEM,
584         },
585         [1] = { /* ADDR */
586                 .start  = VIPER_USB_PHYS + 2,
587                 .end    = VIPER_USB_PHYS + 3,
588                 .flags  = IORESOURCE_MEM,
589         },
590         [2] = {
591                 .start  = gpio_to_irq(VIPER_USB_GPIO),
592                 .end    = gpio_to_irq(VIPER_USB_GPIO),
593                 .flags  = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
594         },
595 };
596
597 /* (DataBusWidth16|AnalogOCEnable|DREQOutputPolarity|DownstreamPort15KRSel ) */
598 static struct isp116x_platform_data isp116x_platform_data = {
599         /* Enable internal resistors on downstream ports */
600         .sel15Kres              = 1,
601         /* On-chip overcurrent protection */
602         .oc_enable              = 1,
603         /* INT output polarity */
604         .int_act_high           = 1,
605         /* INT edge or level triggered */
606         .int_edge_triggered     = 0,
607
608         /* WAKEUP pin connected - NOT SUPPORTED  */
609         /* .remote_wakeup_connected = 0, */
610         /* Wakeup by devices on usb bus enabled */
611         .remote_wakeup_enable   = 0,
612         .delay                  = isp116x_delay,
613 };
614
615 static struct platform_device isp116x_device = {
616         .name                   = "isp116x-hcd",
617         .id                     = -1,
618         .num_resources          = ARRAY_SIZE(isp116x_resources),
619         .resource               = isp116x_resources,
620         .dev                    = {
621                 .platform_data  = &isp116x_platform_data,
622         },
623
624 };
625
626 /* MTD */
627 static struct resource mtd_resources[] = {
628         [0] = { /* RedBoot config + filesystem flash */
629                 .start  = VIPER_FLASH_PHYS,
630                 .end    = VIPER_FLASH_PHYS + SZ_32M - 1,
631                 .flags  = IORESOURCE_MEM,
632         },
633         [1] = { /* Boot flash */
634                 .start  = VIPER_BOOT_PHYS,
635                 .end    = VIPER_BOOT_PHYS + SZ_1M - 1,
636                 .flags  = IORESOURCE_MEM,
637         },
638         [2] = { /*
639                  * SRAM size is actually 256KB, 8bits, with a sparse mapping
640                  * (each byte is on a 16bit boundary).
641                  */
642                 .start  = _VIPER_SRAM_BASE,
643                 .end    = _VIPER_SRAM_BASE + SZ_512K - 1,
644                 .flags  = IORESOURCE_MEM,
645         },
646 };
647
648 static struct mtd_partition viper_boot_flash_partition = {
649         .name           = "RedBoot",
650         .size           = SZ_1M,
651         .offset         = 0,
652         .mask_flags     = MTD_WRITEABLE,        /* force R/O */
653 };
654
655 static struct physmap_flash_data viper_flash_data[] = {
656         [0] = {
657                 .width          = 2,
658                 .parts          = NULL,
659                 .nr_parts       = 0,
660         },
661         [1] = {
662                 .width          = 2,
663                 .parts          = &viper_boot_flash_partition,
664                 .nr_parts       = 1,
665         },
666 };
667
668 static struct platform_device viper_mtd_devices[] = {
669         [0] = {
670                 .name           = "physmap-flash",
671                 .id             = 0,
672                 .dev            = {
673                         .platform_data  = &viper_flash_data[0],
674                 },
675                 .resource       = &mtd_resources[0],
676                 .num_resources  = 1,
677         },
678         [1] = {
679                 .name           = "physmap-flash",
680                 .id             = 1,
681                 .dev            = {
682                         .platform_data  = &viper_flash_data[1],
683                 },
684                 .resource       = &mtd_resources[1],
685                 .num_resources  = 1,
686         },
687 };
688
689 static struct platform_device *viper_devs[] __initdata = {
690         &smc91x_device,
691         &i2c_bus_device,
692         &serial_device,
693         &isp116x_device,
694         &viper_mtd_devices[0],
695         &viper_mtd_devices[1],
696         &viper_backlight_device,
697 };
698
699 static mfp_cfg_t viper_pin_config[] __initdata = {
700         /* Chip selects */
701         GPIO15_nCS_1,
702         GPIO78_nCS_2,
703         GPIO79_nCS_3,
704         GPIO80_nCS_4,
705         GPIO33_nCS_5,
706
707         /* FP Backlight */
708         GPIO9_GPIO,                             /* VIPER_BCKLIGHT_EN_GPIO */
709         GPIO10_GPIO,                            /* VIPER_LCD_EN_GPIO */
710         GPIO16_PWM0_OUT,
711
712         /* Ethernet PHY Ready */
713         GPIO18_RDY,
714
715         /* Serial shutdown */
716         GPIO12_GPIO | MFP_LPM_DRIVE_HIGH,       /* VIPER_UART_SHDN_GPIO */
717
718         /* Compact-Flash / PC104 */
719         GPIO48_nPOE,
720         GPIO49_nPWE,
721         GPIO50_nPIOR,
722         GPIO51_nPIOW,
723         GPIO52_nPCE_1,
724         GPIO53_nPCE_2,
725         GPIO54_nPSKTSEL,
726         GPIO55_nPREG,
727         GPIO56_nPWAIT,
728         GPIO57_nIOIS16,
729         GPIO8_GPIO,                             /* VIPER_CF_RDY_GPIO */
730         GPIO32_GPIO,                            /* VIPER_CF_CD_GPIO */
731         GPIO82_GPIO,                            /* VIPER_CF_POWER_GPIO */
732
733         /* Integrated UPS control */
734         GPIO20_GPIO,                            /* VIPER_UPS_GPIO */
735
736         /* Vcc regulator control */
737         GPIO6_GPIO,                             /* VIPER_PSU_DATA_GPIO */
738         GPIO11_GPIO,                            /* VIPER_PSU_CLK_GPIO */
739         GPIO19_GPIO,                            /* VIPER_PSU_nCS_LD_GPIO */
740
741         /* i2c busses */
742         GPIO26_GPIO,                            /* VIPER_TPM_I2C_SDA_GPIO */
743         GPIO27_GPIO,                            /* VIPER_TPM_I2C_SCL_GPIO */
744         GPIO83_GPIO,                            /* VIPER_RTC_I2C_SDA_GPIO */
745         GPIO84_GPIO,                            /* VIPER_RTC_I2C_SCL_GPIO */
746
747         /* PC/104 Interrupt */
748         GPIO1_GPIO | WAKEUP_ON_EDGE_RISE,       /* VIPER_CPLD_GPIO */
749 };
750
751 static unsigned long viper_tpm;
752
753 static int __init viper_tpm_setup(char *str)
754 {
755         strict_strtoul(str, 10, &viper_tpm);
756         return 1;
757 }
758
759 __setup("tpm=", viper_tpm_setup);
760
761 static void __init viper_tpm_init(void)
762 {
763         struct platform_device *tpm_device;
764         struct i2c_gpio_platform_data i2c_tpm_data = {
765                 .sda_pin = VIPER_TPM_I2C_SDA_GPIO,
766                 .scl_pin = VIPER_TPM_I2C_SCL_GPIO,
767                 .udelay  = 10,
768                 .timeout = 100,
769         };
770         char *errstr;
771
772         /* Allocate TPM i2c bus if requested */
773         if (!viper_tpm)
774                 return;
775
776         tpm_device = platform_device_alloc("i2c-gpio", 2);
777         if (tpm_device) {
778                 if (!platform_device_add_data(tpm_device,
779                                               &i2c_tpm_data,
780                                               sizeof(i2c_tpm_data))) {
781                         if (platform_device_add(tpm_device)) {
782                                 errstr = "register TPM i2c bus";
783                                 goto error_free_tpm;
784                         }
785                 } else {
786                         errstr = "allocate TPM i2c bus data";
787                         goto error_free_tpm;
788                 }
789         } else {
790                 errstr = "allocate TPM i2c device";
791                 goto error_tpm;
792         }
793
794         return;
795
796 error_free_tpm:
797         kfree(tpm_device);
798 error_tpm:
799         pr_err("viper: Couldn't %s, giving up\n", errstr);
800 }
801
802 static void __init viper_init_vcore_gpios(void)
803 {
804         if (gpio_request(VIPER_PSU_DATA_GPIO, "PSU data"))
805                 goto err_request_data;
806
807         if (gpio_request(VIPER_PSU_CLK_GPIO, "PSU clock"))
808                 goto err_request_clk;
809
810         if (gpio_request(VIPER_PSU_nCS_LD_GPIO, "PSU cs"))
811                 goto err_request_cs;
812
813         if (gpio_direction_output(VIPER_PSU_DATA_GPIO, 0) ||
814             gpio_direction_output(VIPER_PSU_CLK_GPIO, 0) ||
815             gpio_direction_output(VIPER_PSU_nCS_LD_GPIO, 0))
816                 goto err_dir;
817
818         /* c/should assume redboot set the correct level ??? */
819         viper_set_core_cpu_voltage(get_clk_frequency_khz(0), 1);
820
821         return;
822
823 err_dir:
824         gpio_free(VIPER_PSU_nCS_LD_GPIO);
825 err_request_cs:
826         gpio_free(VIPER_PSU_CLK_GPIO);
827 err_request_clk:
828         gpio_free(VIPER_PSU_DATA_GPIO);
829 err_request_data:
830         pr_err("viper: Failed to setup vcore control GPIOs\n");
831 }
832
833 static void __init viper_init_serial_gpio(void)
834 {
835         if (gpio_request(VIPER_UART_SHDN_GPIO, "UARTs shutdown"))
836                 goto err_request;
837
838         if (gpio_direction_output(VIPER_UART_SHDN_GPIO, 0))
839                 goto err_dir;
840
841         return;
842
843 err_dir:
844         gpio_free(VIPER_UART_SHDN_GPIO);
845 err_request:
846         pr_err("viper: Failed to setup UART shutdown GPIO\n");
847 }
848
849 #ifdef CONFIG_CPU_FREQ
850 static int viper_cpufreq_notifier(struct notifier_block *nb,
851                                   unsigned long val, void *data)
852 {
853         struct cpufreq_freqs *freq = data;
854
855         /* TODO: Adjust timings??? */
856
857         switch (val) {
858         case CPUFREQ_PRECHANGE:
859                 if (freq->old < freq->new) {
860                         /* we are getting faster so raise the voltage
861                          * before we change freq */
862                         viper_set_core_cpu_voltage(freq->new, 0);
863                 }
864                 break;
865         case CPUFREQ_POSTCHANGE:
866                 if (freq->old > freq->new) {
867                         /* we are slowing down so drop the power
868                          * after we change freq */
869                         viper_set_core_cpu_voltage(freq->new, 0);
870                 }
871                 break;
872         case CPUFREQ_RESUMECHANGE:
873                 viper_set_core_cpu_voltage(freq->new, 0);
874                 break;
875         default:
876                 /* ignore */
877                 break;
878         }
879
880         return 0;
881 }
882
883 static struct notifier_block viper_cpufreq_notifier_block = {
884         .notifier_call  = viper_cpufreq_notifier
885 };
886
887 static void __init viper_init_cpufreq(void)
888 {
889         if (cpufreq_register_notifier(&viper_cpufreq_notifier_block,
890                                       CPUFREQ_TRANSITION_NOTIFIER))
891                 pr_err("viper: Failed to setup cpufreq notifier\n");
892 }
893 #else
894 static inline void viper_init_cpufreq(void) {}
895 #endif
896
897 static void viper_power_off(void)
898 {
899         pr_notice("Shutting off UPS\n");
900         gpio_set_value(VIPER_UPS_GPIO, 1);
901         /* Spin to death... */
902         while (1);
903 }
904
905 static void __init viper_init(void)
906 {
907         u8 version;
908
909         pm_power_off = viper_power_off;
910
911         pxa2xx_mfp_config(ARRAY_AND_SIZE(viper_pin_config));
912
913         /* Wake-up serial console */
914         viper_init_serial_gpio();
915
916         set_pxa_fb_info(&fb_info);
917
918         /* v1 hardware cannot use the datacs line */
919         version = viper_hw_version();
920         if (version == 0)
921                 smc91x_device.num_resources--;
922
923         pxa_set_i2c_info(NULL);
924         platform_add_devices(viper_devs, ARRAY_SIZE(viper_devs));
925
926         viper_init_vcore_gpios();
927         viper_init_cpufreq();
928
929         sysdev_driver_register(&cpu_sysdev_class, &viper_cpu_sysdev_driver);
930
931         if (version) {
932                 pr_info("viper: hardware v%di%d detected. "
933                         "CPLD revision %d.\n",
934                         VIPER_BOARD_VERSION(version),
935                         VIPER_BOARD_ISSUE(version),
936                         VIPER_CPLD_REVISION(version));
937                 system_rev = (VIPER_BOARD_VERSION(version) << 8) |
938                              (VIPER_BOARD_ISSUE(version) << 4) |
939                              VIPER_CPLD_REVISION(version);
940         } else {
941                 pr_info("viper: No version register.\n");
942         }
943
944         i2c_register_board_info(1, ARRAY_AND_SIZE(viper_i2c_devices));
945
946         viper_tpm_init();
947         pxa_set_ac97_info(NULL);
948 }
949
950 static struct map_desc viper_io_desc[] __initdata = {
951         {
952                 .virtual = VIPER_CPLD_BASE,
953                 .pfn     = __phys_to_pfn(VIPER_CPLD_PHYS),
954                 .length  = 0x00300000,
955                 .type    = MT_DEVICE,
956         },
957         {
958                 .virtual = VIPER_PC104IO_BASE,
959                 .pfn     = __phys_to_pfn(_PCMCIA1IO),
960                 .length  = 0x00800000,
961                 .type    = MT_DEVICE,
962         },
963 };
964
965 static void __init viper_map_io(void)
966 {
967         pxa_map_io();
968
969         iotable_init(viper_io_desc, ARRAY_SIZE(viper_io_desc));
970
971         PCFR |= PCFR_OPDE;
972 }
973
974 MACHINE_START(VIPER, "Arcom/Eurotech VIPER SBC")
975         /* Maintainer: Marc Zyngier <maz@misterjones.org> */
976         .phys_io        = 0x40000000,
977         .io_pg_offst    = (io_p2v(0x40000000) >> 18) & 0xfffc,
978         .boot_params    = 0xa0000100,
979         .map_io         = viper_map_io,
980         .init_irq       = viper_init_irq,
981         .timer          = &pxa_timer,
982         .init_machine   = viper_init,
983 MACHINE_END