Merge tag 'arm-newsoc-5.9' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
[linux-2.6-microblaze.git] / arch / arm / mach-pxa / viper.c
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  *  linux/arch/arm/mach-pxa/viper.c
4  *
5  *  Support for the Arcom VIPER SBC.
6  *
7  *  Author:     Ian Campbell
8  *  Created:    Feb 03, 2003
9  *  Copyright:  Arcom Control Systems
10  *
11  *  Maintained by Marc Zyngier <maz@misterjones.org>
12  *                             <marc.zyngier@altran.com>
13  *
14  * Based on lubbock.c:
15  *  Author:     Nicolas Pitre
16  *  Created:    Jun 15, 2001
17  *  Copyright:  MontaVista Software Inc.
18  */
19
20 #include <linux/types.h>
21 #include <linux/memory.h>
22 #include <linux/cpu.h>
23 #include <linux/cpufreq.h>
24 #include <linux/delay.h>
25 #include <linux/fs.h>
26 #include <linux/init.h>
27 #include <linux/slab.h>
28 #include <linux/interrupt.h>
29 #include <linux/major.h>
30 #include <linux/module.h>
31 #include <linux/pm.h>
32 #include <linux/sched.h>
33 #include <linux/gpio.h>
34 #include <linux/jiffies.h>
35 #include <linux/platform_data/i2c-gpio.h>
36 #include <linux/gpio/machine.h>
37 #include <linux/platform_data/i2c-pxa.h>
38 #include <linux/serial_8250.h>
39 #include <linux/smc91x.h>
40 #include <linux/pwm.h>
41 #include <linux/pwm_backlight.h>
42 #include <linux/usb/isp116x.h>
43 #include <linux/mtd/mtd.h>
44 #include <linux/mtd/partitions.h>
45 #include <linux/mtd/physmap.h>
46 #include <linux/syscore_ops.h>
47
48 #include "pxa25x.h"
49 #include <mach/audio.h>
50 #include <linux/platform_data/video-pxafb.h>
51 #include <mach/regs-uart.h>
52 #include <linux/platform_data/pcmcia-pxa2xx_viper.h>
53 #include "viper.h"
54
55 #include <asm/setup.h>
56 #include <asm/mach-types.h>
57 #include <asm/irq.h>
58 #include <linux/sizes.h>
59 #include <asm/system_info.h>
60
61 #include <asm/mach/arch.h>
62 #include <asm/mach/map.h>
63 #include <asm/mach/irq.h>
64
65 #include "generic.h"
66 #include "devices.h"
67
68 static unsigned int icr;
69
70 static void viper_icr_set_bit(unsigned int bit)
71 {
72         icr |= bit;
73         VIPER_ICR = icr;
74 }
75
76 static void viper_icr_clear_bit(unsigned int bit)
77 {
78         icr &= ~bit;
79         VIPER_ICR = icr;
80 }
81
82 /* This function is used from the pcmcia module to reset the CF */
83 static void viper_cf_reset(int state)
84 {
85         if (state)
86                 viper_icr_set_bit(VIPER_ICR_CF_RST);
87         else
88                 viper_icr_clear_bit(VIPER_ICR_CF_RST);
89 }
90
91 static struct arcom_pcmcia_pdata viper_pcmcia_info = {
92         .cd_gpio        = VIPER_CF_CD_GPIO,
93         .rdy_gpio       = VIPER_CF_RDY_GPIO,
94         .pwr_gpio       = VIPER_CF_POWER_GPIO,
95         .reset          = viper_cf_reset,
96 };
97
98 static struct platform_device viper_pcmcia_device = {
99         .name           = "viper-pcmcia",
100         .id             = -1,
101         .dev            = {
102                 .platform_data  = &viper_pcmcia_info,
103         },
104 };
105
106 /*
107  * The CPLD version register was not present on VIPER boards prior to
108  * v2i1. On v1 boards where the version register is not present we
109  * will just read back the previous value from the databus.
110  *
111  * Therefore we do two reads. The first time we write 0 to the
112  * (read-only) register before reading and the second time we write
113  * 0xff first. If the two reads do not match or they read back as 0xff
114  * or 0x00 then we have version 1 hardware.
115  */
116 static u8 viper_hw_version(void)
117 {
118         u8 v1, v2;
119         unsigned long flags;
120
121         local_irq_save(flags);
122
123         VIPER_VERSION = 0;
124         v1 = VIPER_VERSION;
125         VIPER_VERSION = 0xff;
126         v2 = VIPER_VERSION;
127
128         v1 = (v1 != v2 || v1 == 0xff) ? 0 : v1;
129
130         local_irq_restore(flags);
131         return v1;
132 }
133
134 /* CPU system core operations. */
135 static int viper_cpu_suspend(void)
136 {
137         viper_icr_set_bit(VIPER_ICR_R_DIS);
138         return 0;
139 }
140
141 static void viper_cpu_resume(void)
142 {
143         viper_icr_clear_bit(VIPER_ICR_R_DIS);
144 }
145
146 static struct syscore_ops viper_cpu_syscore_ops = {
147         .suspend        = viper_cpu_suspend,
148         .resume         = viper_cpu_resume,
149 };
150
151 static unsigned int current_voltage_divisor;
152
153 /*
154  * If force is not true then step from existing to new divisor. If
155  * force is true then jump straight to the new divisor. Stepping is
156  * used because if the jump in voltage is too large, the VCC can dip
157  * too low and the regulator cuts out.
158  *
159  * force can be used to initialize the divisor to a know state by
160  * setting the value for the current clock speed, since we are already
161  * running at that speed we know the voltage should be pretty close so
162  * the jump won't be too large
163  */
164 static void viper_set_core_cpu_voltage(unsigned long khz, int force)
165 {
166         int i = 0;
167         unsigned int divisor = 0;
168         const char *v;
169
170         if (khz < 200000) {
171                 v = "1.0"; divisor = 0xfff;
172         } else if (khz < 300000) {
173                 v = "1.1"; divisor = 0xde5;
174         } else {
175                 v = "1.3"; divisor = 0x325;
176         }
177
178         pr_debug("viper: setting CPU core voltage to %sV at %d.%03dMHz\n",
179                  v, (int)khz / 1000, (int)khz % 1000);
180
181 #define STEP 0x100
182         do {
183                 int step;
184
185                 if (force)
186                         step = divisor;
187                 else if (current_voltage_divisor < divisor - STEP)
188                         step = current_voltage_divisor + STEP;
189                 else if (current_voltage_divisor > divisor + STEP)
190                         step = current_voltage_divisor - STEP;
191                 else
192                         step = divisor;
193                 force = 0;
194
195                 gpio_set_value(VIPER_PSU_CLK_GPIO, 0);
196                 gpio_set_value(VIPER_PSU_nCS_LD_GPIO, 0);
197
198                 for (i = 1 << 11 ; i > 0 ; i >>= 1) {
199                         udelay(1);
200
201                         gpio_set_value(VIPER_PSU_DATA_GPIO, step & i);
202                         udelay(1);
203
204                         gpio_set_value(VIPER_PSU_CLK_GPIO, 1);
205                         udelay(1);
206
207                         gpio_set_value(VIPER_PSU_CLK_GPIO, 0);
208                 }
209                 udelay(1);
210
211                 gpio_set_value(VIPER_PSU_nCS_LD_GPIO, 1);
212                 udelay(1);
213
214                 gpio_set_value(VIPER_PSU_nCS_LD_GPIO, 0);
215
216                 current_voltage_divisor = step;
217         } while (current_voltage_divisor != divisor);
218 }
219
220 /* Interrupt handling */
221 static unsigned long viper_irq_enabled_mask;
222 static const int viper_isa_irqs[] = { 3, 4, 5, 6, 7, 10, 11, 12, 9, 14, 15 };
223 static const int viper_isa_irq_map[] = {
224         0,              /* ISA irq #0, invalid */
225         0,              /* ISA irq #1, invalid */
226         0,              /* ISA irq #2, invalid */
227         1 << 0,         /* ISA irq #3 */
228         1 << 1,         /* ISA irq #4 */
229         1 << 2,         /* ISA irq #5 */
230         1 << 3,         /* ISA irq #6 */
231         1 << 4,         /* ISA irq #7 */
232         0,              /* ISA irq #8, invalid */
233         1 << 8,         /* ISA irq #9 */
234         1 << 5,         /* ISA irq #10 */
235         1 << 6,         /* ISA irq #11 */
236         1 << 7,         /* ISA irq #12 */
237         0,              /* ISA irq #13, invalid */
238         1 << 9,         /* ISA irq #14 */
239         1 << 10,        /* ISA irq #15 */
240 };
241
242 static inline int viper_irq_to_bitmask(unsigned int irq)
243 {
244         return viper_isa_irq_map[irq - PXA_ISA_IRQ(0)];
245 }
246
247 static inline int viper_bit_to_irq(int bit)
248 {
249         return viper_isa_irqs[bit] + PXA_ISA_IRQ(0);
250 }
251
252 static void viper_ack_irq(struct irq_data *d)
253 {
254         int viper_irq = viper_irq_to_bitmask(d->irq);
255
256         if (viper_irq & 0xff)
257                 VIPER_LO_IRQ_STATUS = viper_irq;
258         else
259                 VIPER_HI_IRQ_STATUS = (viper_irq >> 8);
260 }
261
262 static void viper_mask_irq(struct irq_data *d)
263 {
264         viper_irq_enabled_mask &= ~(viper_irq_to_bitmask(d->irq));
265 }
266
267 static void viper_unmask_irq(struct irq_data *d)
268 {
269         viper_irq_enabled_mask |= viper_irq_to_bitmask(d->irq);
270 }
271
272 static inline unsigned long viper_irq_pending(void)
273 {
274         return (VIPER_HI_IRQ_STATUS << 8 | VIPER_LO_IRQ_STATUS) &
275                         viper_irq_enabled_mask;
276 }
277
278 static void viper_irq_handler(struct irq_desc *desc)
279 {
280         unsigned int irq;
281         unsigned long pending;
282
283         pending = viper_irq_pending();
284         do {
285                 /* we're in a chained irq handler,
286                  * so ack the interrupt by hand */
287                 desc->irq_data.chip->irq_ack(&desc->irq_data);
288
289                 if (likely(pending)) {
290                         irq = viper_bit_to_irq(__ffs(pending));
291                         generic_handle_irq(irq);
292                 }
293                 pending = viper_irq_pending();
294         } while (pending);
295 }
296
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                 irq_clear_status_flags(isa_irq, IRQ_NOREQUEST | IRQ_NOPROBE);
317         }
318
319         irq_set_chained_handler(gpio_to_irq(VIPER_CPLD_GPIO),
320                                 viper_irq_handler);
321         irq_set_irq_type(gpio_to_irq(VIPER_CPLD_GPIO), IRQ_TYPE_EDGE_BOTH);
322 }
323
324 /* Flat Panel */
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 struct pwm_lookup viper_pwm_lookup[] = {
353         PWM_LOOKUP("pxa25x-pwm.0", 0, "pwm-backlight.0", NULL, 1000000,
354                    PWM_POLARITY_NORMAL),
355 };
356
357 static int viper_backlight_init(struct device *dev)
358 {
359         int ret;
360
361         /* GPIO9 and 10 control FB backlight. Initialise to off */
362         ret = gpio_request(VIPER_BCKLIGHT_EN_GPIO, "Backlight");
363         if (ret)
364                 goto err_request_bckl;
365
366         ret = gpio_request(VIPER_LCD_EN_GPIO, "LCD");
367         if (ret)
368                 goto err_request_lcd;
369
370         ret = gpio_direction_output(VIPER_BCKLIGHT_EN_GPIO, 0);
371         if (ret)
372                 goto err_dir;
373
374         ret = gpio_direction_output(VIPER_LCD_EN_GPIO, 0);
375         if (ret)
376                 goto err_dir;
377
378         return 0;
379
380 err_dir:
381         gpio_free(VIPER_LCD_EN_GPIO);
382 err_request_lcd:
383         gpio_free(VIPER_BCKLIGHT_EN_GPIO);
384 err_request_bckl:
385         dev_err(dev, "Failed to setup LCD GPIOs\n");
386
387         return ret;
388 }
389
390 static int viper_backlight_notify(struct device *dev, int brightness)
391 {
392         gpio_set_value(VIPER_LCD_EN_GPIO, !!brightness);
393         gpio_set_value(VIPER_BCKLIGHT_EN_GPIO, !!brightness);
394
395         return brightness;
396 }
397
398 static void viper_backlight_exit(struct device *dev)
399 {
400         gpio_free(VIPER_LCD_EN_GPIO);
401         gpio_free(VIPER_BCKLIGHT_EN_GPIO);
402 }
403
404 static struct platform_pwm_backlight_data viper_backlight_data = {
405         .max_brightness = 100,
406         .dft_brightness = 100,
407         .init           = viper_backlight_init,
408         .notify         = viper_backlight_notify,
409         .exit           = viper_backlight_exit,
410 };
411
412 static struct platform_device viper_backlight_device = {
413         .name           = "pwm-backlight",
414         .dev            = {
415                 .parent         = &pxa25x_device_pwm0.dev,
416                 .platform_data  = &viper_backlight_data,
417         },
418 };
419
420 /* Ethernet */
421 static struct resource smc91x_resources[] = {
422         [0] = {
423                 .name   = "smc91x-regs",
424                 .start  = VIPER_ETH_PHYS + 0x300,
425                 .end    = VIPER_ETH_PHYS + 0x30f,
426                 .flags  = IORESOURCE_MEM,
427         },
428         [1] = {
429                 .start  = PXA_GPIO_TO_IRQ(VIPER_ETH_GPIO),
430                 .end    = PXA_GPIO_TO_IRQ(VIPER_ETH_GPIO),
431                 .flags  = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
432         },
433         [2] = {
434                 .name   = "smc91x-data32",
435                 .start  = VIPER_ETH_DATA_PHYS,
436                 .end    = VIPER_ETH_DATA_PHYS + 3,
437                 .flags  = IORESOURCE_MEM,
438         },
439 };
440
441 static struct smc91x_platdata viper_smc91x_info = {
442         .flags  = SMC91X_USE_16BIT | SMC91X_NOWAIT,
443         .leda   = RPC_LED_100_10,
444         .ledb   = RPC_LED_TX_RX,
445 };
446
447 static struct platform_device smc91x_device = {
448         .name           = "smc91x",
449         .id             = -1,
450         .num_resources  = ARRAY_SIZE(smc91x_resources),
451         .resource       = smc91x_resources,
452         .dev            = {
453                 .platform_data  = &viper_smc91x_info,
454         },
455 };
456
457 /* i2c */
458 static struct gpiod_lookup_table viper_i2c_gpiod_table = {
459         .dev_id         = "i2c-gpio.1",
460         .table          = {
461                 GPIO_LOOKUP_IDX("gpio-pxa", VIPER_RTC_I2C_SDA_GPIO,
462                                 NULL, 0, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
463                 GPIO_LOOKUP_IDX("gpio-pxa", VIPER_RTC_I2C_SCL_GPIO,
464                                 NULL, 1, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
465         },
466 };
467
468 static struct i2c_gpio_platform_data i2c_bus_data = {
469         .udelay  = 10,
470         .timeout = HZ,
471 };
472
473 static struct platform_device i2c_bus_device = {
474         .name           = "i2c-gpio",
475         .id             = 1, /* pxa2xx-i2c is bus 0, so start at 1 */
476         .dev = {
477                 .platform_data = &i2c_bus_data,
478         }
479 };
480
481 static struct i2c_board_info __initdata viper_i2c_devices[] = {
482         {
483                 I2C_BOARD_INFO("ds1338", 0x68),
484         },
485 };
486
487 /*
488  * Serial configuration:
489  * You can either have the standard PXA ports driven by the PXA driver,
490  * or all the ports (PXA + 16850) driven by the 8250 driver.
491  * Choose your poison.
492  */
493
494 static struct resource viper_serial_resources[] = {
495 #ifndef CONFIG_SERIAL_PXA
496         {
497                 .start  = 0x40100000,
498                 .end    = 0x4010001f,
499                 .flags  = IORESOURCE_MEM,
500         },
501         {
502                 .start  = 0x40200000,
503                 .end    = 0x4020001f,
504                 .flags  = IORESOURCE_MEM,
505         },
506         {
507                 .start  = 0x40700000,
508                 .end    = 0x4070001f,
509                 .flags  = IORESOURCE_MEM,
510         },
511         {
512                 .start  = VIPER_UARTA_PHYS,
513                 .end    = VIPER_UARTA_PHYS + 0xf,
514                 .flags  = IORESOURCE_MEM,
515         },
516         {
517                 .start  = VIPER_UARTB_PHYS,
518                 .end    = VIPER_UARTB_PHYS + 0xf,
519                 .flags  = IORESOURCE_MEM,
520         },
521 #else
522         {
523                 0,
524         },
525 #endif
526 };
527
528 static struct plat_serial8250_port serial_platform_data[] = {
529 #ifndef CONFIG_SERIAL_PXA
530         /* Internal UARTs */
531         {
532                 .membase        = (void *)&FFUART,
533                 .mapbase        = __PREG(FFUART),
534                 .irq            = IRQ_FFUART,
535                 .uartclk        = 921600 * 16,
536                 .regshift       = 2,
537                 .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
538                 .iotype         = UPIO_MEM,
539         },
540         {
541                 .membase        = (void *)&BTUART,
542                 .mapbase        = __PREG(BTUART),
543                 .irq            = IRQ_BTUART,
544                 .uartclk        = 921600 * 16,
545                 .regshift       = 2,
546                 .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
547                 .iotype         = UPIO_MEM,
548         },
549         {
550                 .membase        = (void *)&STUART,
551                 .mapbase        = __PREG(STUART),
552                 .irq            = IRQ_STUART,
553                 .uartclk        = 921600 * 16,
554                 .regshift       = 2,
555                 .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
556                 .iotype         = UPIO_MEM,
557         },
558         /* External UARTs */
559         {
560                 .mapbase        = VIPER_UARTA_PHYS,
561                 .irq            = PXA_GPIO_TO_IRQ(VIPER_UARTA_GPIO),
562                 .irqflags       = IRQF_TRIGGER_RISING,
563                 .uartclk        = 1843200,
564                 .regshift       = 1,
565                 .iotype         = UPIO_MEM,
566                 .flags          = UPF_BOOT_AUTOCONF | UPF_IOREMAP |
567                                   UPF_SKIP_TEST,
568         },
569         {
570                 .mapbase        = VIPER_UARTB_PHYS,
571                 .irq            = PXA_GPIO_TO_IRQ(VIPER_UARTB_GPIO),
572                 .irqflags       = IRQF_TRIGGER_RISING,
573                 .uartclk        = 1843200,
574                 .regshift       = 1,
575                 .iotype         = UPIO_MEM,
576                 .flags          = UPF_BOOT_AUTOCONF | UPF_IOREMAP |
577                                   UPF_SKIP_TEST,
578         },
579 #endif
580         { },
581 };
582
583 static struct platform_device serial_device = {
584         .name                   = "serial8250",
585         .id                     = 0,
586         .dev                    = {
587                 .platform_data  = serial_platform_data,
588         },
589         .num_resources          = ARRAY_SIZE(viper_serial_resources),
590         .resource               = viper_serial_resources,
591 };
592
593 /* USB */
594 static void isp116x_delay(struct device *dev, int delay)
595 {
596         ndelay(delay);
597 }
598
599 static struct resource isp116x_resources[] = {
600         [0] = { /* DATA */
601                 .start  = VIPER_USB_PHYS + 0,
602                 .end    = VIPER_USB_PHYS + 1,
603                 .flags  = IORESOURCE_MEM,
604         },
605         [1] = { /* ADDR */
606                 .start  = VIPER_USB_PHYS + 2,
607                 .end    = VIPER_USB_PHYS + 3,
608                 .flags  = IORESOURCE_MEM,
609         },
610         [2] = {
611                 .start  = PXA_GPIO_TO_IRQ(VIPER_USB_GPIO),
612                 .end    = PXA_GPIO_TO_IRQ(VIPER_USB_GPIO),
613                 .flags  = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
614         },
615 };
616
617 /* (DataBusWidth16|AnalogOCEnable|DREQOutputPolarity|DownstreamPort15KRSel ) */
618 static struct isp116x_platform_data isp116x_platform_data = {
619         /* Enable internal resistors on downstream ports */
620         .sel15Kres              = 1,
621         /* On-chip overcurrent protection */
622         .oc_enable              = 1,
623         /* INT output polarity */
624         .int_act_high           = 1,
625         /* INT edge or level triggered */
626         .int_edge_triggered     = 0,
627
628         /* WAKEUP pin connected - NOT SUPPORTED  */
629         /* .remote_wakeup_connected = 0, */
630         /* Wakeup by devices on usb bus enabled */
631         .remote_wakeup_enable   = 0,
632         .delay                  = isp116x_delay,
633 };
634
635 static struct platform_device isp116x_device = {
636         .name                   = "isp116x-hcd",
637         .id                     = -1,
638         .num_resources          = ARRAY_SIZE(isp116x_resources),
639         .resource               = isp116x_resources,
640         .dev                    = {
641                 .platform_data  = &isp116x_platform_data,
642         },
643
644 };
645
646 /* MTD */
647 static struct resource mtd_resources[] = {
648         [0] = { /* RedBoot config + filesystem flash */
649                 .start  = VIPER_FLASH_PHYS,
650                 .end    = VIPER_FLASH_PHYS + SZ_32M - 1,
651                 .flags  = IORESOURCE_MEM,
652         },
653         [1] = { /* Boot flash */
654                 .start  = VIPER_BOOT_PHYS,
655                 .end    = VIPER_BOOT_PHYS + SZ_1M - 1,
656                 .flags  = IORESOURCE_MEM,
657         },
658         [2] = { /*
659                  * SRAM size is actually 256KB, 8bits, with a sparse mapping
660                  * (each byte is on a 16bit boundary).
661                  */
662                 .start  = _VIPER_SRAM_BASE,
663                 .end    = _VIPER_SRAM_BASE + SZ_512K - 1,
664                 .flags  = IORESOURCE_MEM,
665         },
666 };
667
668 static struct mtd_partition viper_boot_flash_partition = {
669         .name           = "RedBoot",
670         .size           = SZ_1M,
671         .offset         = 0,
672         .mask_flags     = MTD_WRITEABLE,        /* force R/O */
673 };
674
675 static struct physmap_flash_data viper_flash_data[] = {
676         [0] = {
677                 .width          = 2,
678                 .parts          = NULL,
679                 .nr_parts       = 0,
680         },
681         [1] = {
682                 .width          = 2,
683                 .parts          = &viper_boot_flash_partition,
684                 .nr_parts       = 1,
685         },
686 };
687
688 static struct platform_device viper_mtd_devices[] = {
689         [0] = {
690                 .name           = "physmap-flash",
691                 .id             = 0,
692                 .dev            = {
693                         .platform_data  = &viper_flash_data[0],
694                 },
695                 .resource       = &mtd_resources[0],
696                 .num_resources  = 1,
697         },
698         [1] = {
699                 .name           = "physmap-flash",
700                 .id             = 1,
701                 .dev            = {
702                         .platform_data  = &viper_flash_data[1],
703                 },
704                 .resource       = &mtd_resources[1],
705                 .num_resources  = 1,
706         },
707 };
708
709 static struct platform_device *viper_devs[] __initdata = {
710         &smc91x_device,
711         &i2c_bus_device,
712         &serial_device,
713         &isp116x_device,
714         &viper_mtd_devices[0],
715         &viper_mtd_devices[1],
716         &viper_backlight_device,
717         &viper_pcmcia_device,
718 };
719
720 static mfp_cfg_t viper_pin_config[] __initdata = {
721         /* Chip selects */
722         GPIO15_nCS_1,
723         GPIO78_nCS_2,
724         GPIO79_nCS_3,
725         GPIO80_nCS_4,
726         GPIO33_nCS_5,
727
728         /* AC97 */
729         GPIO28_AC97_BITCLK,
730         GPIO29_AC97_SDATA_IN_0,
731         GPIO30_AC97_SDATA_OUT,
732         GPIO31_AC97_SYNC,
733
734         /* FP Backlight */
735         GPIO9_GPIO,                             /* VIPER_BCKLIGHT_EN_GPIO */
736         GPIO10_GPIO,                            /* VIPER_LCD_EN_GPIO */
737         GPIO16_PWM0_OUT,
738
739         /* Ethernet PHY Ready */
740         GPIO18_RDY,
741
742         /* Serial shutdown */
743         GPIO12_GPIO | MFP_LPM_DRIVE_HIGH,       /* VIPER_UART_SHDN_GPIO */
744
745         /* Compact-Flash / PC104 */
746         GPIO48_nPOE,
747         GPIO49_nPWE,
748         GPIO50_nPIOR,
749         GPIO51_nPIOW,
750         GPIO52_nPCE_1,
751         GPIO53_nPCE_2,
752         GPIO54_nPSKTSEL,
753         GPIO55_nPREG,
754         GPIO56_nPWAIT,
755         GPIO57_nIOIS16,
756         GPIO8_GPIO,                             /* VIPER_CF_RDY_GPIO */
757         GPIO32_GPIO,                            /* VIPER_CF_CD_GPIO */
758         GPIO82_GPIO,                            /* VIPER_CF_POWER_GPIO */
759
760         /* Integrated UPS control */
761         GPIO20_GPIO,                            /* VIPER_UPS_GPIO */
762
763         /* Vcc regulator control */
764         GPIO6_GPIO,                             /* VIPER_PSU_DATA_GPIO */
765         GPIO11_GPIO,                            /* VIPER_PSU_CLK_GPIO */
766         GPIO19_GPIO,                            /* VIPER_PSU_nCS_LD_GPIO */
767
768         /* i2c busses */
769         GPIO26_GPIO,                            /* VIPER_TPM_I2C_SDA_GPIO */
770         GPIO27_GPIO,                            /* VIPER_TPM_I2C_SCL_GPIO */
771         GPIO83_GPIO,                            /* VIPER_RTC_I2C_SDA_GPIO */
772         GPIO84_GPIO,                            /* VIPER_RTC_I2C_SCL_GPIO */
773
774         /* PC/104 Interrupt */
775         GPIO1_GPIO | WAKEUP_ON_EDGE_RISE,       /* VIPER_CPLD_GPIO */
776 };
777
778 static unsigned long viper_tpm;
779
780 static int __init viper_tpm_setup(char *str)
781 {
782         return kstrtoul(str, 10, &viper_tpm) >= 0;
783 }
784
785 __setup("tpm=", viper_tpm_setup);
786
787 struct gpiod_lookup_table viper_tpm_i2c_gpiod_table = {
788         .dev_id = "i2c-gpio.2",
789         .table = {
790                 GPIO_LOOKUP_IDX("gpio-pxa", VIPER_TPM_I2C_SDA_GPIO,
791                                 NULL, 0, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
792                 GPIO_LOOKUP_IDX("gpio-pxa", VIPER_TPM_I2C_SCL_GPIO,
793                                 NULL, 1, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
794         },
795 };
796
797 static void __init viper_tpm_init(void)
798 {
799         struct platform_device *tpm_device;
800         struct i2c_gpio_platform_data i2c_tpm_data = {
801                 .udelay  = 10,
802                 .timeout = HZ,
803         };
804         char *errstr;
805
806         /* Allocate TPM i2c bus if requested */
807         if (!viper_tpm)
808                 return;
809
810         gpiod_add_lookup_table(&viper_tpm_i2c_gpiod_table);
811         tpm_device = platform_device_alloc("i2c-gpio", 2);
812         if (tpm_device) {
813                 if (!platform_device_add_data(tpm_device,
814                                               &i2c_tpm_data,
815                                               sizeof(i2c_tpm_data))) {
816                         if (platform_device_add(tpm_device)) {
817                                 errstr = "register TPM i2c bus";
818                                 goto error_free_tpm;
819                         }
820                 } else {
821                         errstr = "allocate TPM i2c bus data";
822                         goto error_free_tpm;
823                 }
824         } else {
825                 errstr = "allocate TPM i2c device";
826                 goto error_tpm;
827         }
828
829         return;
830
831 error_free_tpm:
832         kfree(tpm_device);
833 error_tpm:
834         pr_err("viper: Couldn't %s, giving up\n", errstr);
835 }
836
837 static void __init viper_init_vcore_gpios(void)
838 {
839         if (gpio_request(VIPER_PSU_DATA_GPIO, "PSU data"))
840                 goto err_request_data;
841
842         if (gpio_request(VIPER_PSU_CLK_GPIO, "PSU clock"))
843                 goto err_request_clk;
844
845         if (gpio_request(VIPER_PSU_nCS_LD_GPIO, "PSU cs"))
846                 goto err_request_cs;
847
848         if (gpio_direction_output(VIPER_PSU_DATA_GPIO, 0) ||
849             gpio_direction_output(VIPER_PSU_CLK_GPIO, 0) ||
850             gpio_direction_output(VIPER_PSU_nCS_LD_GPIO, 0))
851                 goto err_dir;
852
853         /* c/should assume redboot set the correct level ??? */
854         viper_set_core_cpu_voltage(get_clk_frequency_khz(0), 1);
855
856         return;
857
858 err_dir:
859         gpio_free(VIPER_PSU_nCS_LD_GPIO);
860 err_request_cs:
861         gpio_free(VIPER_PSU_CLK_GPIO);
862 err_request_clk:
863         gpio_free(VIPER_PSU_DATA_GPIO);
864 err_request_data:
865         pr_err("viper: Failed to setup vcore control GPIOs\n");
866 }
867
868 static void __init viper_init_serial_gpio(void)
869 {
870         if (gpio_request(VIPER_UART_SHDN_GPIO, "UARTs shutdown"))
871                 goto err_request;
872
873         if (gpio_direction_output(VIPER_UART_SHDN_GPIO, 0))
874                 goto err_dir;
875
876         return;
877
878 err_dir:
879         gpio_free(VIPER_UART_SHDN_GPIO);
880 err_request:
881         pr_err("viper: Failed to setup UART shutdown GPIO\n");
882 }
883
884 #ifdef CONFIG_CPU_FREQ
885 static int viper_cpufreq_notifier(struct notifier_block *nb,
886                                   unsigned long val, void *data)
887 {
888         struct cpufreq_freqs *freq = data;
889
890         /* TODO: Adjust timings??? */
891
892         switch (val) {
893         case CPUFREQ_PRECHANGE:
894                 if (freq->old < freq->new) {
895                         /* we are getting faster so raise the voltage
896                          * before we change freq */
897                         viper_set_core_cpu_voltage(freq->new, 0);
898                 }
899                 break;
900         case CPUFREQ_POSTCHANGE:
901                 if (freq->old > freq->new) {
902                         /* we are slowing down so drop the power
903                          * after we change freq */
904                         viper_set_core_cpu_voltage(freq->new, 0);
905                 }
906                 break;
907         default:
908                 /* ignore */
909                 break;
910         }
911
912         return 0;
913 }
914
915 static struct notifier_block viper_cpufreq_notifier_block = {
916         .notifier_call  = viper_cpufreq_notifier
917 };
918
919 static void __init viper_init_cpufreq(void)
920 {
921         if (cpufreq_register_notifier(&viper_cpufreq_notifier_block,
922                                       CPUFREQ_TRANSITION_NOTIFIER))
923                 pr_err("viper: Failed to setup cpufreq notifier\n");
924 }
925 #else
926 static inline void viper_init_cpufreq(void) {}
927 #endif
928
929 static void viper_power_off(void)
930 {
931         pr_notice("Shutting off UPS\n");
932         gpio_set_value(VIPER_UPS_GPIO, 1);
933         /* Spin to death... */
934         while (1);
935 }
936
937 static void __init viper_init(void)
938 {
939         u8 version;
940
941         pm_power_off = viper_power_off;
942
943         pxa2xx_mfp_config(ARRAY_AND_SIZE(viper_pin_config));
944
945         pxa_set_ffuart_info(NULL);
946         pxa_set_btuart_info(NULL);
947         pxa_set_stuart_info(NULL);
948
949         /* Wake-up serial console */
950         viper_init_serial_gpio();
951
952         pxa_set_fb_info(NULL, &fb_info);
953
954         /* v1 hardware cannot use the datacs line */
955         version = viper_hw_version();
956         if (version == 0)
957                 smc91x_device.num_resources--;
958
959         pxa_set_i2c_info(NULL);
960         gpiod_add_lookup_table(&viper_i2c_gpiod_table);
961         pwm_add_table(viper_pwm_lookup, ARRAY_SIZE(viper_pwm_lookup));
962         platform_add_devices(viper_devs, ARRAY_SIZE(viper_devs));
963
964         viper_init_vcore_gpios();
965         viper_init_cpufreq();
966
967         register_syscore_ops(&viper_cpu_syscore_ops);
968
969         if (version) {
970                 pr_info("viper: hardware v%di%d detected. "
971                         "CPLD revision %d.\n",
972                         VIPER_BOARD_VERSION(version),
973                         VIPER_BOARD_ISSUE(version),
974                         VIPER_CPLD_REVISION(version));
975                 system_rev = (VIPER_BOARD_VERSION(version) << 8) |
976                              (VIPER_BOARD_ISSUE(version) << 4) |
977                              VIPER_CPLD_REVISION(version);
978         } else {
979                 pr_info("viper: No version register.\n");
980         }
981
982         i2c_register_board_info(1, ARRAY_AND_SIZE(viper_i2c_devices));
983
984         viper_tpm_init();
985         pxa_set_ac97_info(NULL);
986 }
987
988 static struct map_desc viper_io_desc[] __initdata = {
989         {
990                 .virtual = VIPER_CPLD_BASE,
991                 .pfn     = __phys_to_pfn(VIPER_CPLD_PHYS),
992                 .length  = 0x00300000,
993                 .type    = MT_DEVICE,
994         },
995         {
996                 .virtual = VIPER_PC104IO_BASE,
997                 .pfn     = __phys_to_pfn(0x30000000),
998                 .length  = 0x00800000,
999                 .type    = MT_DEVICE,
1000         },
1001 };
1002
1003 static void __init viper_map_io(void)
1004 {
1005         pxa25x_map_io();
1006
1007         iotable_init(viper_io_desc, ARRAY_SIZE(viper_io_desc));
1008
1009         PCFR |= PCFR_OPDE;
1010 }
1011
1012 MACHINE_START(VIPER, "Arcom/Eurotech VIPER SBC")
1013         /* Maintainer: Marc Zyngier <maz@misterjones.org> */
1014         .atag_offset    = 0x100,
1015         .map_io         = viper_map_io,
1016         .nr_irqs        = PXA_NR_IRQS,
1017         .init_irq       = viper_init_irq,
1018         .handle_irq     = pxa25x_handle_irq,
1019         .init_time      = pxa_timer_init,
1020         .init_machine   = viper_init,
1021         .restart        = pxa_restart,
1022 MACHINE_END