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

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