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352699a3 MZ |
1 | /* |
2 | * linux/arch/arm/mach-pxa/viper.c | |
3 | * | |
4 | * Support for the Arcom VIPER SBC. | |
5 | * | |
6 | * Author: Ian Campbell | |
7 | * Created: Feb 03, 2003 | |
8 | * Copyright: Arcom Control Systems | |
9 | * | |
10 | * Maintained by Marc Zyngier <maz@misterjones.org> | |
11 | * <marc.zyngier@altran.com> | |
12 | * | |
13 | * Based on lubbock.c: | |
14 | * Author: Nicolas Pitre | |
15 | * Created: Jun 15, 2001 | |
16 | * Copyright: MontaVista Software Inc. | |
17 | * | |
18 | * This program is free software; you can redistribute it and/or modify | |
19 | * it under the terms of the GNU General Public License version 2 as | |
20 | * published by the Free Software Foundation. | |
21 | */ | |
22 | ||
23 | #include <linux/types.h> | |
24 | #include <linux/memory.h> | |
25 | #include <linux/cpu.h> | |
26 | #include <linux/cpufreq.h> | |
27 | #include <linux/delay.h> | |
28 | #include <linux/fs.h> | |
29 | #include <linux/init.h> | |
30 | #include <linux/interrupt.h> | |
31 | #include <linux/major.h> | |
32 | #include <linux/module.h> | |
33 | #include <linux/pm.h> | |
34 | #include <linux/sched.h> | |
35 | #include <linux/gpio.h> | |
36 | #include <linux/i2c-gpio.h> | |
37 | #include <linux/serial_8250.h> | |
38 | #include <linux/smc91x.h> | |
39 | #include <linux/pwm_backlight.h> | |
40 | #include <linux/usb/isp116x.h> | |
41 | #include <linux/mtd/mtd.h> | |
42 | #include <linux/mtd/partitions.h> | |
43 | #include <linux/mtd/physmap.h> | |
44 | ||
51c62982 | 45 | #include <mach/pxa25x.h> |
352699a3 MZ |
46 | #include <mach/audio.h> |
47 | #include <mach/pxafb.h> | |
352699a3 MZ |
48 | #include <mach/i2c.h> |
49 | #include <mach/viper.h> | |
50 | ||
51 | #include <asm/setup.h> | |
52 | #include <asm/mach-types.h> | |
53 | #include <asm/irq.h> | |
54 | #include <asm/sizes.h> | |
55 | ||
56 | #include <asm/mach/arch.h> | |
57 | #include <asm/mach/map.h> | |
58 | #include <asm/mach/irq.h> | |
59 | ||
60 | #include "generic.h" | |
61 | #include "devices.h" | |
62 | ||
63 | static unsigned int icr; | |
64 | ||
65 | static void viper_icr_set_bit(unsigned int bit) | |
66 | { | |
67 | icr |= bit; | |
68 | VIPER_ICR = icr; | |
69 | } | |
70 | ||
71 | static void viper_icr_clear_bit(unsigned int bit) | |
72 | { | |
73 | icr &= ~bit; | |
74 | VIPER_ICR = icr; | |
75 | } | |
76 | ||
77 | /* This function is used from the pcmcia module to reset the CF */ | |
78 | void viper_cf_rst(int state) | |
79 | { | |
80 | if (state) | |
81 | viper_icr_set_bit(VIPER_ICR_CF_RST); | |
82 | else | |
83 | viper_icr_clear_bit(VIPER_ICR_CF_RST); | |
84 | } | |
85 | EXPORT_SYMBOL(viper_cf_rst); | |
86 | ||
87 | /* | |
88 | * The CPLD version register was not present on VIPER boards prior to | |
89 | * v2i1. On v1 boards where the version register is not present we | |
90 | * will just read back the previous value from the databus. | |
91 | * | |
92 | * Therefore we do two reads. The first time we write 0 to the | |
93 | * (read-only) register before reading and the second time we write | |
94 | * 0xff first. If the two reads do not match or they read back as 0xff | |
95 | * or 0x00 then we have version 1 hardware. | |
96 | */ | |
97 | static u8 viper_hw_version(void) | |
98 | { | |
99 | u8 v1, v2; | |
100 | unsigned long flags; | |
101 | ||
102 | local_irq_save(flags); | |
103 | ||
104 | VIPER_VERSION = 0; | |
105 | v1 = VIPER_VERSION; | |
106 | VIPER_VERSION = 0xff; | |
107 | v2 = VIPER_VERSION; | |
108 | ||
109 | v1 = (v1 != v2 || v1 == 0xff) ? 0 : v1; | |
110 | ||
111 | local_irq_restore(flags); | |
112 | return v1; | |
113 | } | |
114 | ||
115 | /* CPU sysdev */ | |
116 | static int viper_cpu_suspend(struct sys_device *sysdev, pm_message_t state) | |
117 | { | |
118 | viper_icr_set_bit(VIPER_ICR_R_DIS); | |
119 | return 0; | |
120 | } | |
121 | ||
122 | static int viper_cpu_resume(struct sys_device *sysdev) | |
123 | { | |
124 | viper_icr_clear_bit(VIPER_ICR_R_DIS); | |
125 | return 0; | |
126 | } | |
127 | ||
128 | static struct sysdev_driver viper_cpu_sysdev_driver = { | |
129 | .suspend = viper_cpu_suspend, | |
130 | .resume = viper_cpu_resume, | |
131 | }; | |
132 | ||
133 | static unsigned int current_voltage_divisor; | |
134 | ||
135 | /* | |
136 | * If force is not true then step from existing to new divisor. If | |
137 | * force is true then jump straight to the new divisor. Stepping is | |
138 | * used because if the jump in voltage is too large, the VCC can dip | |
139 | * too low and the regulator cuts out. | |
140 | * | |
141 | * force can be used to initialize the divisor to a know state by | |
142 | * setting the value for the current clock speed, since we are already | |
143 | * running at that speed we know the voltage should be pretty close so | |
144 | * the jump won't be too large | |
145 | */ | |
146 | static void viper_set_core_cpu_voltage(unsigned long khz, int force) | |
147 | { | |
148 | int i = 0; | |
149 | unsigned int divisor = 0; | |
150 | const char *v; | |
151 | ||
152 | if (khz < 200000) { | |
153 | v = "1.0"; divisor = 0xfff; | |
154 | } else if (khz < 300000) { | |
155 | v = "1.1"; divisor = 0xde5; | |
156 | } else { | |
157 | v = "1.3"; divisor = 0x325; | |
158 | } | |
159 | ||
160 | pr_debug("viper: setting CPU core voltage to %sV at %d.%03dMHz\n", | |
161 | v, (int)khz / 1000, (int)khz % 1000); | |
162 | ||
163 | #define STEP 0x100 | |
164 | do { | |
165 | int step; | |
166 | ||
167 | if (force) | |
168 | step = divisor; | |
169 | else if (current_voltage_divisor < divisor - STEP) | |
170 | step = current_voltage_divisor + STEP; | |
171 | else if (current_voltage_divisor > divisor + STEP) | |
172 | step = current_voltage_divisor - STEP; | |
173 | else | |
174 | step = divisor; | |
175 | force = 0; | |
176 | ||
177 | gpio_set_value(VIPER_PSU_CLK_GPIO, 0); | |
178 | gpio_set_value(VIPER_PSU_nCS_LD_GPIO, 0); | |
179 | ||
180 | for (i = 1 << 11 ; i > 0 ; i >>= 1) { | |
181 | udelay(1); | |
182 | ||
183 | gpio_set_value(VIPER_PSU_DATA_GPIO, step & i); | |
184 | udelay(1); | |
185 | ||
186 | gpio_set_value(VIPER_PSU_CLK_GPIO, 1); | |
187 | udelay(1); | |
188 | ||
189 | gpio_set_value(VIPER_PSU_CLK_GPIO, 0); | |
190 | } | |
191 | udelay(1); | |
192 | ||
193 | gpio_set_value(VIPER_PSU_nCS_LD_GPIO, 1); | |
194 | udelay(1); | |
195 | ||
196 | gpio_set_value(VIPER_PSU_nCS_LD_GPIO, 0); | |
197 | ||
198 | current_voltage_divisor = step; | |
199 | } while (current_voltage_divisor != divisor); | |
200 | } | |
201 | ||
202 | /* Interrupt handling */ | |
203 | static unsigned long viper_irq_enabled_mask; | |
a9ff8f64 MZ |
204 | static const int viper_isa_irqs[] = { 3, 4, 5, 6, 7, 10, 11, 12, 9, 14, 15 }; |
205 | static const int viper_isa_irq_map[] = { | |
206 | 0, /* ISA irq #0, invalid */ | |
207 | 0, /* ISA irq #1, invalid */ | |
208 | 0, /* ISA irq #2, invalid */ | |
209 | 1 << 0, /* ISA irq #3 */ | |
210 | 1 << 1, /* ISA irq #4 */ | |
211 | 1 << 2, /* ISA irq #5 */ | |
212 | 1 << 3, /* ISA irq #6 */ | |
213 | 1 << 4, /* ISA irq #7 */ | |
214 | 0, /* ISA irq #8, invalid */ | |
215 | 1 << 8, /* ISA irq #9 */ | |
216 | 1 << 5, /* ISA irq #10 */ | |
217 | 1 << 6, /* ISA irq #11 */ | |
218 | 1 << 7, /* ISA irq #12 */ | |
219 | 0, /* ISA irq #13, invalid */ | |
220 | 1 << 9, /* ISA irq #14 */ | |
221 | 1 << 10, /* ISA irq #15 */ | |
222 | }; | |
223 | ||
224 | static inline int viper_irq_to_bitmask(unsigned int irq) | |
225 | { | |
226 | return viper_isa_irq_map[irq - PXA_ISA_IRQ(0)]; | |
227 | } | |
228 | ||
229 | static inline int viper_bit_to_irq(int bit) | |
230 | { | |
231 | return viper_isa_irqs[bit] + PXA_ISA_IRQ(0); | |
232 | } | |
352699a3 MZ |
233 | |
234 | static void viper_ack_irq(unsigned int irq) | |
235 | { | |
a9ff8f64 | 236 | int viper_irq = viper_irq_to_bitmask(irq); |
352699a3 | 237 | |
a9ff8f64 MZ |
238 | if (viper_irq & 0xff) |
239 | VIPER_LO_IRQ_STATUS = viper_irq; | |
352699a3 | 240 | else |
a9ff8f64 | 241 | VIPER_HI_IRQ_STATUS = (viper_irq >> 8); |
352699a3 MZ |
242 | } |
243 | ||
244 | static void viper_mask_irq(unsigned int irq) | |
245 | { | |
a9ff8f64 | 246 | viper_irq_enabled_mask &= ~(viper_irq_to_bitmask(irq)); |
352699a3 MZ |
247 | } |
248 | ||
249 | static void viper_unmask_irq(unsigned int irq) | |
250 | { | |
a9ff8f64 | 251 | viper_irq_enabled_mask |= viper_irq_to_bitmask(irq); |
352699a3 MZ |
252 | } |
253 | ||
254 | static inline unsigned long viper_irq_pending(void) | |
255 | { | |
256 | return (VIPER_HI_IRQ_STATUS << 8 | VIPER_LO_IRQ_STATUS) & | |
257 | viper_irq_enabled_mask; | |
258 | } | |
259 | ||
260 | static void viper_irq_handler(unsigned int irq, struct irq_desc *desc) | |
261 | { | |
262 | unsigned long pending; | |
263 | ||
264 | pending = viper_irq_pending(); | |
265 | do { | |
a9ff8f64 MZ |
266 | /* we're in a chained irq handler, |
267 | * so ack the interrupt by hand */ | |
268 | GEDR(VIPER_CPLD_GPIO) = GPIO_bit(VIPER_CPLD_GPIO); | |
269 | ||
352699a3 | 270 | if (likely(pending)) { |
a9ff8f64 | 271 | irq = viper_bit_to_irq(__ffs(pending)); |
352699a3 MZ |
272 | generic_handle_irq(irq); |
273 | } | |
274 | pending = viper_irq_pending(); | |
275 | } while (pending); | |
276 | } | |
277 | ||
278 | static struct irq_chip viper_irq_chip = { | |
279 | .name = "ISA", | |
280 | .ack = viper_ack_irq, | |
281 | .mask = viper_mask_irq, | |
282 | .unmask = viper_unmask_irq | |
283 | }; | |
284 | ||
285 | static void __init viper_init_irq(void) | |
286 | { | |
a9ff8f64 | 287 | int level; |
352699a3 MZ |
288 | int isa_irq; |
289 | ||
290 | pxa25x_init_irq(); | |
291 | ||
292 | /* setup ISA IRQs */ | |
a9ff8f64 MZ |
293 | for (level = 0; level < ARRAY_SIZE(viper_isa_irqs); level++) { |
294 | isa_irq = viper_bit_to_irq(level); | |
352699a3 MZ |
295 | set_irq_chip(isa_irq, &viper_irq_chip); |
296 | set_irq_handler(isa_irq, handle_edge_irq); | |
297 | set_irq_flags(isa_irq, IRQF_VALID | IRQF_PROBE); | |
298 | } | |
299 | ||
300 | set_irq_chained_handler(gpio_to_irq(VIPER_CPLD_GPIO), | |
301 | viper_irq_handler); | |
302 | set_irq_type(gpio_to_irq(VIPER_CPLD_GPIO), IRQ_TYPE_EDGE_BOTH); | |
303 | ||
304 | #ifndef CONFIG_SERIAL_PXA | |
305 | /* | |
306 | * 8250 doesn't support IRQ_TYPE being passed as part | |
307 | * of the plat_serial8250_port structure... | |
308 | */ | |
309 | set_irq_type(gpio_to_irq(VIPER_UARTA_GPIO), IRQ_TYPE_EDGE_RISING); | |
310 | set_irq_type(gpio_to_irq(VIPER_UARTB_GPIO), IRQ_TYPE_EDGE_RISING); | |
311 | #endif | |
312 | } | |
313 | ||
314 | /* Flat Panel */ | |
315 | static struct pxafb_mode_info fb_mode_info[] = { | |
316 | { | |
317 | .pixclock = 157500, | |
318 | ||
319 | .xres = 320, | |
320 | .yres = 240, | |
321 | ||
322 | .bpp = 16, | |
323 | ||
324 | .hsync_len = 63, | |
325 | .left_margin = 7, | |
326 | .right_margin = 13, | |
327 | ||
328 | .vsync_len = 20, | |
329 | .upper_margin = 0, | |
330 | .lower_margin = 0, | |
331 | ||
332 | .sync = 0, | |
333 | }, | |
334 | }; | |
335 | ||
336 | static struct pxafb_mach_info fb_info = { | |
337 | .modes = fb_mode_info, | |
338 | .num_modes = 1, | |
339 | .lcd_conn = LCD_COLOR_TFT_16BPP | LCD_PCLK_EDGE_FALL, | |
340 | }; | |
341 | ||
342 | static int viper_backlight_init(struct device *dev) | |
343 | { | |
344 | int ret; | |
345 | ||
346 | /* GPIO9 and 10 control FB backlight. Initialise to off */ | |
347 | ret = gpio_request(VIPER_BCKLIGHT_EN_GPIO, "Backlight"); | |
348 | if (ret) | |
349 | goto err_request_bckl; | |
350 | ||
351 | ret = gpio_request(VIPER_LCD_EN_GPIO, "LCD"); | |
352 | if (ret) | |
353 | goto err_request_lcd; | |
354 | ||
355 | ret = gpio_direction_output(VIPER_BCKLIGHT_EN_GPIO, 0); | |
356 | if (ret) | |
357 | goto err_dir; | |
358 | ||
359 | ret = gpio_direction_output(VIPER_LCD_EN_GPIO, 0); | |
360 | if (ret) | |
361 | goto err_dir; | |
362 | ||
363 | return 0; | |
364 | ||
365 | err_dir: | |
366 | gpio_free(VIPER_LCD_EN_GPIO); | |
367 | err_request_lcd: | |
368 | gpio_free(VIPER_BCKLIGHT_EN_GPIO); | |
369 | err_request_bckl: | |
370 | dev_err(dev, "Failed to setup LCD GPIOs\n"); | |
371 | ||
372 | return ret; | |
373 | } | |
374 | ||
375 | static int viper_backlight_notify(int brightness) | |
376 | { | |
377 | gpio_set_value(VIPER_LCD_EN_GPIO, !!brightness); | |
378 | gpio_set_value(VIPER_BCKLIGHT_EN_GPIO, !!brightness); | |
379 | ||
380 | return brightness; | |
381 | } | |
382 | ||
383 | static void viper_backlight_exit(struct device *dev) | |
384 | { | |
385 | gpio_free(VIPER_LCD_EN_GPIO); | |
386 | gpio_free(VIPER_BCKLIGHT_EN_GPIO); | |
387 | } | |
388 | ||
389 | static struct platform_pwm_backlight_data viper_backlight_data = { | |
390 | .pwm_id = 0, | |
391 | .max_brightness = 100, | |
392 | .dft_brightness = 100, | |
393 | .pwm_period_ns = 1000000, | |
394 | .init = viper_backlight_init, | |
395 | .notify = viper_backlight_notify, | |
396 | .exit = viper_backlight_exit, | |
397 | }; | |
398 | ||
399 | static struct platform_device viper_backlight_device = { | |
400 | .name = "pwm-backlight", | |
401 | .dev = { | |
402 | .parent = &pxa25x_device_pwm0.dev, | |
403 | .platform_data = &viper_backlight_data, | |
404 | }, | |
405 | }; | |
406 | ||
407 | /* Ethernet */ | |
408 | static struct resource smc91x_resources[] = { | |
409 | [0] = { | |
410 | .name = "smc91x-regs", | |
411 | .start = VIPER_ETH_PHYS + 0x300, | |
412 | .end = VIPER_ETH_PHYS + 0x30f, | |
413 | .flags = IORESOURCE_MEM, | |
414 | }, | |
415 | [1] = { | |
416 | .start = gpio_to_irq(VIPER_ETH_GPIO), | |
417 | .end = gpio_to_irq(VIPER_ETH_GPIO), | |
418 | .flags = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE, | |
419 | }, | |
420 | [2] = { | |
421 | .name = "smc91x-data32", | |
422 | .start = VIPER_ETH_DATA_PHYS, | |
423 | .end = VIPER_ETH_DATA_PHYS + 3, | |
424 | .flags = IORESOURCE_MEM, | |
425 | }, | |
426 | }; | |
427 | ||
428 | static struct smc91x_platdata viper_smc91x_info = { | |
429 | .flags = SMC91X_USE_16BIT | SMC91X_NOWAIT, | |
430 | .leda = RPC_LED_100_10, | |
431 | .ledb = RPC_LED_TX_RX, | |
432 | }; | |
433 | ||
434 | static struct platform_device smc91x_device = { | |
435 | .name = "smc91x", | |
436 | .id = -1, | |
437 | .num_resources = ARRAY_SIZE(smc91x_resources), | |
438 | .resource = smc91x_resources, | |
439 | .dev = { | |
440 | .platform_data = &viper_smc91x_info, | |
441 | }, | |
442 | }; | |
443 | ||
444 | /* i2c */ | |
445 | static struct i2c_gpio_platform_data i2c_bus_data = { | |
446 | .sda_pin = VIPER_RTC_I2C_SDA_GPIO, | |
447 | .scl_pin = VIPER_RTC_I2C_SCL_GPIO, | |
448 | .udelay = 10, | |
449 | .timeout = 100, | |
450 | }; | |
451 | ||
452 | static struct platform_device i2c_bus_device = { | |
453 | .name = "i2c-gpio", | |
454 | .id = 1, /* pxa2xx-i2c is bus 0, so start at 1 */ | |
455 | .dev = { | |
456 | .platform_data = &i2c_bus_data, | |
457 | } | |
458 | }; | |
459 | ||
460 | static struct i2c_board_info __initdata viper_i2c_devices[] = { | |
461 | { | |
462 | I2C_BOARD_INFO("ds1338", 0x68), | |
463 | }, | |
464 | }; | |
465 | ||
466 | /* | |
467 | * Serial configuration: | |
468 | * You can either have the standard PXA ports driven by the PXA driver, | |
469 | * or all the ports (PXA + 16850) driven by the 8250 driver. | |
470 | * Choose your poison. | |
471 | */ | |
472 | ||
473 | static struct resource viper_serial_resources[] = { | |
474 | #ifndef CONFIG_SERIAL_PXA | |
475 | { | |
476 | .start = 0x40100000, | |
477 | .end = 0x4010001f, | |
478 | .flags = IORESOURCE_MEM, | |
479 | }, | |
480 | { | |
481 | .start = 0x40200000, | |
482 | .end = 0x4020001f, | |
483 | .flags = IORESOURCE_MEM, | |
484 | }, | |
485 | { | |
486 | .start = 0x40700000, | |
487 | .end = 0x4070001f, | |
488 | .flags = IORESOURCE_MEM, | |
489 | }, | |
490 | { | |
491 | .start = VIPER_UARTA_PHYS, | |
492 | .end = VIPER_UARTA_PHYS + 0xf, | |
493 | .flags = IORESOURCE_MEM, | |
494 | }, | |
495 | { | |
496 | .start = VIPER_UARTB_PHYS, | |
497 | .end = VIPER_UARTB_PHYS + 0xf, | |
498 | .flags = IORESOURCE_MEM, | |
499 | }, | |
500 | #else | |
501 | { | |
502 | 0, | |
503 | }, | |
504 | #endif | |
505 | }; | |
506 | ||
507 | static struct plat_serial8250_port serial_platform_data[] = { | |
508 | #ifndef CONFIG_SERIAL_PXA | |
509 | /* Internal UARTs */ | |
510 | { | |
511 | .membase = (void *)&FFUART, | |
512 | .mapbase = __PREG(FFUART), | |
513 | .irq = IRQ_FFUART, | |
514 | .uartclk = 921600 * 16, | |
515 | .regshift = 2, | |
516 | .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST, | |
517 | .iotype = UPIO_MEM, | |
518 | }, | |
519 | { | |
520 | .membase = (void *)&BTUART, | |
521 | .mapbase = __PREG(BTUART), | |
522 | .irq = IRQ_BTUART, | |
523 | .uartclk = 921600 * 16, | |
524 | .regshift = 2, | |
525 | .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST, | |
526 | .iotype = UPIO_MEM, | |
527 | }, | |
528 | { | |
529 | .membase = (void *)&STUART, | |
530 | .mapbase = __PREG(STUART), | |
531 | .irq = IRQ_STUART, | |
532 | .uartclk = 921600 * 16, | |
533 | .regshift = 2, | |
534 | .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST, | |
535 | .iotype = UPIO_MEM, | |
536 | }, | |
537 | /* External UARTs */ | |
538 | { | |
539 | .mapbase = VIPER_UARTA_PHYS, | |
540 | .irq = gpio_to_irq(VIPER_UARTA_GPIO), | |
541 | .uartclk = 1843200, | |
542 | .regshift = 1, | |
543 | .iotype = UPIO_MEM, | |
544 | .flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP | | |
545 | UPF_SKIP_TEST, | |
546 | }, | |
547 | { | |
548 | .mapbase = VIPER_UARTB_PHYS, | |
549 | .irq = gpio_to_irq(VIPER_UARTB_GPIO), | |
550 | .uartclk = 1843200, | |
551 | .regshift = 1, | |
552 | .iotype = UPIO_MEM, | |
553 | .flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP | | |
554 | UPF_SKIP_TEST, | |
555 | }, | |
556 | #endif | |
557 | { }, | |
558 | }; | |
559 | ||
560 | static struct platform_device serial_device = { | |
561 | .name = "serial8250", | |
562 | .id = 0, | |
563 | .dev = { | |
564 | .platform_data = serial_platform_data, | |
565 | }, | |
566 | .num_resources = ARRAY_SIZE(viper_serial_resources), | |
567 | .resource = viper_serial_resources, | |
568 | }; | |
569 | ||
570 | /* USB */ | |
571 | static void isp116x_delay(struct device *dev, int delay) | |
572 | { | |
573 | ndelay(delay); | |
574 | } | |
575 | ||
576 | static struct resource isp116x_resources[] = { | |
577 | [0] = { /* DATA */ | |
578 | .start = VIPER_USB_PHYS + 0, | |
579 | .end = VIPER_USB_PHYS + 1, | |
580 | .flags = IORESOURCE_MEM, | |
581 | }, | |
582 | [1] = { /* ADDR */ | |
583 | .start = VIPER_USB_PHYS + 2, | |
584 | .end = VIPER_USB_PHYS + 3, | |
585 | .flags = IORESOURCE_MEM, | |
586 | }, | |
587 | [2] = { | |
588 | .start = gpio_to_irq(VIPER_USB_GPIO), | |
589 | .end = gpio_to_irq(VIPER_USB_GPIO), | |
590 | .flags = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE, | |
591 | }, | |
592 | }; | |
593 | ||
594 | /* (DataBusWidth16|AnalogOCEnable|DREQOutputPolarity|DownstreamPort15KRSel ) */ | |
595 | static struct isp116x_platform_data isp116x_platform_data = { | |
596 | /* Enable internal resistors on downstream ports */ | |
597 | .sel15Kres = 1, | |
598 | /* On-chip overcurrent protection */ | |
599 | .oc_enable = 1, | |
600 | /* INT output polarity */ | |
601 | .int_act_high = 1, | |
602 | /* INT edge or level triggered */ | |
603 | .int_edge_triggered = 0, | |
604 | ||
605 | /* WAKEUP pin connected - NOT SUPPORTED */ | |
606 | /* .remote_wakeup_connected = 0, */ | |
607 | /* Wakeup by devices on usb bus enabled */ | |
608 | .remote_wakeup_enable = 0, | |
609 | .delay = isp116x_delay, | |
610 | }; | |
611 | ||
612 | static struct platform_device isp116x_device = { | |
613 | .name = "isp116x-hcd", | |
614 | .id = -1, | |
615 | .num_resources = ARRAY_SIZE(isp116x_resources), | |
616 | .resource = isp116x_resources, | |
617 | .dev = { | |
618 | .platform_data = &isp116x_platform_data, | |
619 | }, | |
620 | ||
621 | }; | |
622 | ||
623 | /* MTD */ | |
624 | static struct resource mtd_resources[] = { | |
625 | [0] = { /* RedBoot config + filesystem flash */ | |
626 | .start = VIPER_FLASH_PHYS, | |
627 | .end = VIPER_FLASH_PHYS + SZ_32M - 1, | |
628 | .flags = IORESOURCE_MEM, | |
629 | }, | |
630 | [1] = { /* Boot flash */ | |
631 | .start = VIPER_BOOT_PHYS, | |
632 | .end = VIPER_BOOT_PHYS + SZ_1M - 1, | |
633 | .flags = IORESOURCE_MEM, | |
634 | }, | |
635 | [2] = { /* | |
636 | * SRAM size is actually 256KB, 8bits, with a sparse mapping | |
637 | * (each byte is on a 16bit boundary). | |
638 | */ | |
639 | .start = _VIPER_SRAM_BASE, | |
640 | .end = _VIPER_SRAM_BASE + SZ_512K - 1, | |
641 | .flags = IORESOURCE_MEM, | |
642 | }, | |
643 | }; | |
644 | ||
645 | static struct mtd_partition viper_boot_flash_partition = { | |
646 | .name = "RedBoot", | |
647 | .size = SZ_1M, | |
648 | .offset = 0, | |
649 | .mask_flags = MTD_WRITEABLE, /* force R/O */ | |
650 | }; | |
651 | ||
652 | static struct physmap_flash_data viper_flash_data[] = { | |
653 | [0] = { | |
654 | .width = 2, | |
655 | .parts = NULL, | |
656 | .nr_parts = 0, | |
657 | }, | |
658 | [1] = { | |
659 | .width = 2, | |
660 | .parts = &viper_boot_flash_partition, | |
661 | .nr_parts = 1, | |
662 | }, | |
663 | }; | |
664 | ||
665 | static struct platform_device viper_mtd_devices[] = { | |
666 | [0] = { | |
667 | .name = "physmap-flash", | |
668 | .id = 0, | |
669 | .dev = { | |
670 | .platform_data = &viper_flash_data[0], | |
671 | }, | |
672 | .resource = &mtd_resources[0], | |
673 | .num_resources = 1, | |
674 | }, | |
675 | [1] = { | |
676 | .name = "physmap-flash", | |
677 | .id = 1, | |
678 | .dev = { | |
679 | .platform_data = &viper_flash_data[1], | |
680 | }, | |
681 | .resource = &mtd_resources[1], | |
682 | .num_resources = 1, | |
683 | }, | |
684 | }; | |
685 | ||
686 | static struct platform_device *viper_devs[] __initdata = { | |
687 | &smc91x_device, | |
688 | &i2c_bus_device, | |
689 | &serial_device, | |
690 | &isp116x_device, | |
691 | &viper_mtd_devices[0], | |
692 | &viper_mtd_devices[1], | |
693 | &viper_backlight_device, | |
694 | }; | |
695 | ||
696 | static mfp_cfg_t viper_pin_config[] __initdata = { | |
697 | /* Chip selects */ | |
698 | GPIO15_nCS_1, | |
699 | GPIO78_nCS_2, | |
700 | GPIO79_nCS_3, | |
701 | GPIO80_nCS_4, | |
702 | GPIO33_nCS_5, | |
703 | ||
704 | /* FP Backlight */ | |
705 | GPIO9_GPIO, /* VIPER_BCKLIGHT_EN_GPIO */ | |
706 | GPIO10_GPIO, /* VIPER_LCD_EN_GPIO */ | |
707 | GPIO16_PWM0_OUT, | |
708 | ||
709 | /* Ethernet PHY Ready */ | |
710 | GPIO18_RDY, | |
711 | ||
712 | /* Serial shutdown */ | |
713 | GPIO12_GPIO | MFP_LPM_DRIVE_HIGH, /* VIPER_UART_SHDN_GPIO */ | |
714 | ||
715 | /* Compact-Flash / PC104 */ | |
716 | GPIO48_nPOE, | |
717 | GPIO49_nPWE, | |
718 | GPIO50_nPIOR, | |
719 | GPIO51_nPIOW, | |
720 | GPIO52_nPCE_1, | |
721 | GPIO53_nPCE_2, | |
722 | GPIO54_nPSKTSEL, | |
723 | GPIO55_nPREG, | |
724 | GPIO56_nPWAIT, | |
725 | GPIO57_nIOIS16, | |
726 | GPIO8_GPIO, /* VIPER_CF_RDY_GPIO */ | |
727 | GPIO32_GPIO, /* VIPER_CF_CD_GPIO */ | |
728 | GPIO82_GPIO, /* VIPER_CF_POWER_GPIO */ | |
729 | ||
730 | /* Integrated UPS control */ | |
731 | GPIO20_GPIO, /* VIPER_UPS_GPIO */ | |
732 | ||
733 | /* Vcc regulator control */ | |
734 | GPIO6_GPIO, /* VIPER_PSU_DATA_GPIO */ | |
735 | GPIO11_GPIO, /* VIPER_PSU_CLK_GPIO */ | |
736 | GPIO19_GPIO, /* VIPER_PSU_nCS_LD_GPIO */ | |
737 | ||
738 | /* i2c busses */ | |
739 | GPIO26_GPIO, /* VIPER_TPM_I2C_SDA_GPIO */ | |
740 | GPIO27_GPIO, /* VIPER_TPM_I2C_SCL_GPIO */ | |
741 | GPIO83_GPIO, /* VIPER_RTC_I2C_SDA_GPIO */ | |
742 | GPIO84_GPIO, /* VIPER_RTC_I2C_SCL_GPIO */ | |
743 | ||
744 | /* PC/104 Interrupt */ | |
745 | GPIO1_GPIO | WAKEUP_ON_EDGE_RISE, /* VIPER_CPLD_GPIO */ | |
746 | }; | |
747 | ||
748 | static unsigned long viper_tpm; | |
749 | ||
750 | static int __init viper_tpm_setup(char *str) | |
751 | { | |
752 | strict_strtoul(str, 10, &viper_tpm); | |
753 | return 1; | |
754 | } | |
755 | ||
756 | __setup("tpm=", viper_tpm_setup); | |
757 | ||
758 | static void __init viper_tpm_init(void) | |
759 | { | |
760 | struct platform_device *tpm_device; | |
761 | struct i2c_gpio_platform_data i2c_tpm_data = { | |
762 | .sda_pin = VIPER_TPM_I2C_SDA_GPIO, | |
763 | .scl_pin = VIPER_TPM_I2C_SCL_GPIO, | |
764 | .udelay = 10, | |
765 | .timeout = 100, | |
766 | }; | |
767 | char *errstr; | |
768 | ||
769 | /* Allocate TPM i2c bus if requested */ | |
770 | if (!viper_tpm) | |
771 | return; | |
772 | ||
773 | tpm_device = platform_device_alloc("i2c-gpio", 2); | |
774 | if (tpm_device) { | |
775 | if (!platform_device_add_data(tpm_device, | |
776 | &i2c_tpm_data, | |
777 | sizeof(i2c_tpm_data))) { | |
778 | if (platform_device_add(tpm_device)) { | |
779 | errstr = "register TPM i2c bus"; | |
780 | goto error_free_tpm; | |
781 | } | |
782 | } else { | |
783 | errstr = "allocate TPM i2c bus data"; | |
784 | goto error_free_tpm; | |
785 | } | |
786 | } else { | |
787 | errstr = "allocate TPM i2c device"; | |
788 | goto error_tpm; | |
789 | } | |
790 | ||
791 | return; | |
792 | ||
793 | error_free_tpm: | |
794 | kfree(tpm_device); | |
795 | error_tpm: | |
796 | pr_err("viper: Couldn't %s, giving up\n", errstr); | |
797 | } | |
798 | ||
799 | static void __init viper_init_vcore_gpios(void) | |
800 | { | |
801 | if (gpio_request(VIPER_PSU_DATA_GPIO, "PSU data")) | |
802 | goto err_request_data; | |
803 | ||
804 | if (gpio_request(VIPER_PSU_CLK_GPIO, "PSU clock")) | |
805 | goto err_request_clk; | |
806 | ||
807 | if (gpio_request(VIPER_PSU_nCS_LD_GPIO, "PSU cs")) | |
808 | goto err_request_cs; | |
809 | ||
810 | if (gpio_direction_output(VIPER_PSU_DATA_GPIO, 0) || | |
811 | gpio_direction_output(VIPER_PSU_CLK_GPIO, 0) || | |
812 | gpio_direction_output(VIPER_PSU_nCS_LD_GPIO, 0)) | |
813 | goto err_dir; | |
814 | ||
815 | /* c/should assume redboot set the correct level ??? */ | |
816 | viper_set_core_cpu_voltage(get_clk_frequency_khz(0), 1); | |
817 | ||
818 | return; | |
819 | ||
820 | err_dir: | |
821 | gpio_free(VIPER_PSU_nCS_LD_GPIO); | |
822 | err_request_cs: | |
823 | gpio_free(VIPER_PSU_CLK_GPIO); | |
824 | err_request_clk: | |
825 | gpio_free(VIPER_PSU_DATA_GPIO); | |
826 | err_request_data: | |
827 | pr_err("viper: Failed to setup vcore control GPIOs\n"); | |
828 | } | |
829 | ||
830 | static void __init viper_init_serial_gpio(void) | |
831 | { | |
832 | if (gpio_request(VIPER_UART_SHDN_GPIO, "UARTs shutdown")) | |
833 | goto err_request; | |
834 | ||
835 | if (gpio_direction_output(VIPER_UART_SHDN_GPIO, 0)) | |
836 | goto err_dir; | |
837 | ||
838 | return; | |
839 | ||
840 | err_dir: | |
841 | gpio_free(VIPER_UART_SHDN_GPIO); | |
842 | err_request: | |
843 | pr_err("viper: Failed to setup UART shutdown GPIO\n"); | |
844 | } | |
845 | ||
846 | #ifdef CONFIG_CPU_FREQ | |
847 | static int viper_cpufreq_notifier(struct notifier_block *nb, | |
848 | unsigned long val, void *data) | |
849 | { | |
850 | struct cpufreq_freqs *freq = data; | |
851 | ||
852 | /* TODO: Adjust timings??? */ | |
853 | ||
854 | switch (val) { | |
855 | case CPUFREQ_PRECHANGE: | |
856 | if (freq->old < freq->new) { | |
857 | /* we are getting faster so raise the voltage | |
858 | * before we change freq */ | |
859 | viper_set_core_cpu_voltage(freq->new, 0); | |
860 | } | |
861 | break; | |
862 | case CPUFREQ_POSTCHANGE: | |
863 | if (freq->old > freq->new) { | |
864 | /* we are slowing down so drop the power | |
865 | * after we change freq */ | |
866 | viper_set_core_cpu_voltage(freq->new, 0); | |
867 | } | |
868 | break; | |
869 | case CPUFREQ_RESUMECHANGE: | |
870 | viper_set_core_cpu_voltage(freq->new, 0); | |
871 | break; | |
872 | default: | |
873 | /* ignore */ | |
874 | break; | |
875 | } | |
876 | ||
877 | return 0; | |
878 | } | |
879 | ||
880 | static struct notifier_block viper_cpufreq_notifier_block = { | |
881 | .notifier_call = viper_cpufreq_notifier | |
882 | }; | |
883 | ||
884 | static void __init viper_init_cpufreq(void) | |
885 | { | |
886 | if (cpufreq_register_notifier(&viper_cpufreq_notifier_block, | |
887 | CPUFREQ_TRANSITION_NOTIFIER)) | |
888 | pr_err("viper: Failed to setup cpufreq notifier\n"); | |
889 | } | |
890 | #else | |
891 | static inline void viper_init_cpufreq(void) {} | |
892 | #endif | |
893 | ||
894 | static void viper_power_off(void) | |
895 | { | |
896 | pr_notice("Shutting off UPS\n"); | |
897 | gpio_set_value(VIPER_UPS_GPIO, 1); | |
898 | /* Spin to death... */ | |
899 | while (1); | |
900 | } | |
901 | ||
902 | static void __init viper_init(void) | |
903 | { | |
904 | u8 version; | |
905 | ||
906 | pm_power_off = viper_power_off; | |
907 | ||
908 | pxa2xx_mfp_config(ARRAY_AND_SIZE(viper_pin_config)); | |
909 | ||
910 | /* Wake-up serial console */ | |
911 | viper_init_serial_gpio(); | |
912 | ||
913 | set_pxa_fb_info(&fb_info); | |
914 | ||
915 | /* v1 hardware cannot use the datacs line */ | |
916 | version = viper_hw_version(); | |
917 | if (version == 0) | |
918 | smc91x_device.num_resources--; | |
919 | ||
920 | pxa_set_i2c_info(NULL); | |
921 | platform_add_devices(viper_devs, ARRAY_SIZE(viper_devs)); | |
922 | ||
923 | viper_init_vcore_gpios(); | |
924 | viper_init_cpufreq(); | |
925 | ||
926 | sysdev_driver_register(&cpu_sysdev_class, &viper_cpu_sysdev_driver); | |
927 | ||
928 | if (version) { | |
929 | pr_info("viper: hardware v%di%d detected. " | |
930 | "CPLD revision %d.\n", | |
931 | VIPER_BOARD_VERSION(version), | |
932 | VIPER_BOARD_ISSUE(version), | |
933 | VIPER_CPLD_REVISION(version)); | |
934 | system_rev = (VIPER_BOARD_VERSION(version) << 8) | | |
935 | (VIPER_BOARD_ISSUE(version) << 4) | | |
936 | VIPER_CPLD_REVISION(version); | |
937 | } else { | |
938 | pr_info("viper: No version register.\n"); | |
939 | } | |
940 | ||
941 | i2c_register_board_info(1, ARRAY_AND_SIZE(viper_i2c_devices)); | |
942 | ||
943 | viper_tpm_init(); | |
944 | pxa_set_ac97_info(NULL); | |
945 | } | |
946 | ||
947 | static struct map_desc viper_io_desc[] __initdata = { | |
948 | { | |
949 | .virtual = VIPER_CPLD_BASE, | |
950 | .pfn = __phys_to_pfn(VIPER_CPLD_PHYS), | |
951 | .length = 0x00300000, | |
952 | .type = MT_DEVICE, | |
953 | }, | |
954 | { | |
955 | .virtual = VIPER_PC104IO_BASE, | |
956 | .pfn = __phys_to_pfn(_PCMCIA1IO), | |
957 | .length = 0x00800000, | |
958 | .type = MT_DEVICE, | |
959 | }, | |
960 | }; | |
961 | ||
962 | static void __init viper_map_io(void) | |
963 | { | |
964 | pxa_map_io(); | |
965 | ||
966 | iotable_init(viper_io_desc, ARRAY_SIZE(viper_io_desc)); | |
967 | ||
968 | PCFR |= PCFR_OPDE; | |
969 | } | |
970 | ||
971 | MACHINE_START(VIPER, "Arcom/Eurotech VIPER SBC") | |
972 | /* Maintainer: Marc Zyngier <maz@misterjones.org> */ | |
973 | .phys_io = 0x40000000, | |
974 | .io_pg_offst = (io_p2v(0x40000000) >> 18) & 0xfffc, | |
975 | .boot_params = 0xa0000100, | |
976 | .map_io = viper_map_io, | |
977 | .init_irq = viper_init_irq, | |
978 | .timer = &pxa_timer, | |
979 | .init_machine = viper_init, | |
980 | MACHINE_END |