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TOMOYO Linux Cross Reference
Linux/arch/arm/mach-pxa/viper.c

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

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