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OMAP3: GPIO: Enable debounce clock only when debounce is enabled v3.
[linux-ginger.git] / arch / arm / mach-integrator / integrator_cp.c
blob6b99e9c258bdcc71ae47d9b928d6ff83c1bccfa8
1 /*
2 * linux/arch/arm/mach-integrator/integrator_cp.c
3 *
4 * Copyright (C) 2003 Deep Blue Solutions Ltd
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License.
9 */
10 #include <linux/types.h>
11 #include <linux/kernel.h>
12 #include <linux/init.h>
13 #include <linux/list.h>
14 #include <linux/platform_device.h>
15 #include <linux/dma-mapping.h>
16 #include <linux/slab.h>
17 #include <linux/string.h>
18 #include <linux/sysdev.h>
19 #include <linux/amba/bus.h>
20 #include <linux/amba/kmi.h>
21 #include <linux/amba/clcd.h>
22
23 #include <mach/hardware.h>
24 #include <asm/io.h>
25 #include <asm/irq.h>
26 #include <asm/setup.h>
27 #include <asm/mach-types.h>
28 #include <asm/hardware/icst525.h>
29
30 #include <mach/cm.h>
31 #include <mach/lm.h>
32
33 #include <asm/mach/arch.h>
34 #include <asm/mach/flash.h>
35 #include <asm/mach/irq.h>
36 #include <asm/mach/mmc.h>
37 #include <asm/mach/map.h>
38 #include <asm/mach/time.h>
39
40 #include "common.h"
41 #include "clock.h"
42
43 #define INTCP_PA_MMC_BASE 0x1c000000
44 #define INTCP_PA_AACI_BASE 0x1d000000
45
46 #define INTCP_PA_FLASH_BASE 0x24000000
47 #define INTCP_FLASH_SIZE SZ_32M
48
49 #define INTCP_PA_CLCD_BASE 0xc0000000
50
51 #define INTCP_VA_CIC_BASE 0xf1000040
52 #define INTCP_VA_PIC_BASE 0xf1400000
53 #define INTCP_VA_SIC_BASE 0xfca00000
54
55 #define INTCP_PA_ETH_BASE 0xc8000000
56 #define INTCP_ETH_SIZE 0x10
57
58 #define INTCP_VA_CTRL_BASE 0xfcb00000
59 #define INTCP_FLASHPROG 0x04
60 #define CINTEGRATOR_FLASHPROG_FLVPPEN (1 << 0)
61 #define CINTEGRATOR_FLASHPROG_FLWREN (1 << 1)
62
63 /*
64 * Logical Physical
65 * f1000000 10000000 Core module registers
66 * f1100000 11000000 System controller registers
67 * f1200000 12000000 EBI registers
68 * f1300000 13000000 Counter/Timer
69 * f1400000 14000000 Interrupt controller
70 * f1600000 16000000 UART 0
71 * f1700000 17000000 UART 1
72 * f1a00000 1a000000 Debug LEDs
73 * f1b00000 1b000000 GPIO
74 */
75
76 static struct map_desc intcp_io_desc[] __initdata = {
77 {
78 .virtual = IO_ADDRESS(INTEGRATOR_HDR_BASE),
79 .pfn = __phys_to_pfn(INTEGRATOR_HDR_BASE),
80 .length = SZ_4K,
81 .type = MT_DEVICE
82 }, {
83 .virtual = IO_ADDRESS(INTEGRATOR_SC_BASE),
84 .pfn = __phys_to_pfn(INTEGRATOR_SC_BASE),
85 .length = SZ_4K,
86 .type = MT_DEVICE
87 }, {
88 .virtual = IO_ADDRESS(INTEGRATOR_EBI_BASE),
89 .pfn = __phys_to_pfn(INTEGRATOR_EBI_BASE),
90 .length = SZ_4K,
91 .type = MT_DEVICE
92 }, {
93 .virtual = IO_ADDRESS(INTEGRATOR_CT_BASE),
94 .pfn = __phys_to_pfn(INTEGRATOR_CT_BASE),
95 .length = SZ_4K,
96 .type = MT_DEVICE
97 }, {
98 .virtual = IO_ADDRESS(INTEGRATOR_IC_BASE),
99 .pfn = __phys_to_pfn(INTEGRATOR_IC_BASE),
100 .length = SZ_4K,
101 .type = MT_DEVICE
102 }, {
103 .virtual = IO_ADDRESS(INTEGRATOR_UART0_BASE),
104 .pfn = __phys_to_pfn(INTEGRATOR_UART0_BASE),
105 .length = SZ_4K,
106 .type = MT_DEVICE
107 }, {
108 .virtual = IO_ADDRESS(INTEGRATOR_UART1_BASE),
109 .pfn = __phys_to_pfn(INTEGRATOR_UART1_BASE),
110 .length = SZ_4K,
111 .type = MT_DEVICE
112 }, {
113 .virtual = IO_ADDRESS(INTEGRATOR_DBG_BASE),
114 .pfn = __phys_to_pfn(INTEGRATOR_DBG_BASE),
115 .length = SZ_4K,
116 .type = MT_DEVICE
117 }, {
118 .virtual = IO_ADDRESS(INTEGRATOR_GPIO_BASE),
119 .pfn = __phys_to_pfn(INTEGRATOR_GPIO_BASE),
120 .length = SZ_4K,
121 .type = MT_DEVICE
122 }, {
123 .virtual = 0xfca00000,
124 .pfn = __phys_to_pfn(0xca000000),
125 .length = SZ_4K,
126 .type = MT_DEVICE
127 }, {
128 .virtual = 0xfcb00000,
129 .pfn = __phys_to_pfn(0xcb000000),
130 .length = SZ_4K,
131 .type = MT_DEVICE
132 }
133 };
134
135 static void __init intcp_map_io(void)
136 {
137 iotable_init(intcp_io_desc, ARRAY_SIZE(intcp_io_desc));
138 }
139
140 #define cic_writel __raw_writel
141 #define cic_readl __raw_readl
142 #define pic_writel __raw_writel
143 #define pic_readl __raw_readl
144 #define sic_writel __raw_writel
145 #define sic_readl __raw_readl
146
147 static void cic_mask_irq(unsigned int irq)
148 {
149 irq -= IRQ_CIC_START;
150 cic_writel(1 << irq, INTCP_VA_CIC_BASE + IRQ_ENABLE_CLEAR);
151 }
152
153 static void cic_unmask_irq(unsigned int irq)
154 {
155 irq -= IRQ_CIC_START;
156 cic_writel(1 << irq, INTCP_VA_CIC_BASE + IRQ_ENABLE_SET);
157 }
158
159 static struct irq_chip cic_chip = {
160 .name = "CIC",
161 .ack = cic_mask_irq,
162 .mask = cic_mask_irq,
163 .unmask = cic_unmask_irq,
164 };
165
166 static void pic_mask_irq(unsigned int irq)
167 {
168 irq -= IRQ_PIC_START;
169 pic_writel(1 << irq, INTCP_VA_PIC_BASE + IRQ_ENABLE_CLEAR);
170 }
171
172 static void pic_unmask_irq(unsigned int irq)
173 {
174 irq -= IRQ_PIC_START;
175 pic_writel(1 << irq, INTCP_VA_PIC_BASE + IRQ_ENABLE_SET);
176 }
177
178 static struct irq_chip pic_chip = {
179 .name = "PIC",
180 .ack = pic_mask_irq,
181 .mask = pic_mask_irq,
182 .unmask = pic_unmask_irq,
183 };
184
185 static void sic_mask_irq(unsigned int irq)
186 {
187 irq -= IRQ_SIC_START;
188 sic_writel(1 << irq, INTCP_VA_SIC_BASE + IRQ_ENABLE_CLEAR);
189 }
190
191 static void sic_unmask_irq(unsigned int irq)
192 {
193 irq -= IRQ_SIC_START;
194 sic_writel(1 << irq, INTCP_VA_SIC_BASE + IRQ_ENABLE_SET);
195 }
196
197 static struct irq_chip sic_chip = {
198 .name = "SIC",
199 .ack = sic_mask_irq,
200 .mask = sic_mask_irq,
201 .unmask = sic_unmask_irq,
202 };
203
204 static void
205 sic_handle_irq(unsigned int irq, struct irq_desc *desc)
206 {
207 unsigned long status = sic_readl(INTCP_VA_SIC_BASE + IRQ_STATUS);
208
209 if (status == 0) {
210 do_bad_IRQ(irq, desc);
211 return;
212 }
213
214 do {
215 irq = ffs(status) - 1;
216 status &= ~(1 << irq);
217
218 irq += IRQ_SIC_START;
219
220 desc = irq_desc + irq;
221 desc_handle_irq(irq, desc);
222 } while (status);
223 }
224
225 static void __init intcp_init_irq(void)
226 {
227 unsigned int i;
228
229 /*
230 * Disable all interrupt sources
231 */
232 pic_writel(0xffffffff, INTCP_VA_PIC_BASE + IRQ_ENABLE_CLEAR);
233 pic_writel(0xffffffff, INTCP_VA_PIC_BASE + FIQ_ENABLE_CLEAR);
234
235 for (i = IRQ_PIC_START; i <= IRQ_PIC_END; i++) {
236 if (i == 11)
237 i = 22;
238 if (i == 29)
239 break;
240 set_irq_chip(i, &pic_chip);
241 set_irq_handler(i, handle_level_irq);
242 set_irq_flags(i, IRQF_VALID | IRQF_PROBE);
243 }
244
245 cic_writel(0xffffffff, INTCP_VA_CIC_BASE + IRQ_ENABLE_CLEAR);
246 cic_writel(0xffffffff, INTCP_VA_CIC_BASE + FIQ_ENABLE_CLEAR);
247
248 for (i = IRQ_CIC_START; i <= IRQ_CIC_END; i++) {
249 set_irq_chip(i, &cic_chip);
250 set_irq_handler(i, handle_level_irq);
251 set_irq_flags(i, IRQF_VALID);
252 }
253
254 sic_writel(0x00000fff, INTCP_VA_SIC_BASE + IRQ_ENABLE_CLEAR);
255 sic_writel(0x00000fff, INTCP_VA_SIC_BASE + FIQ_ENABLE_CLEAR);
256
257 for (i = IRQ_SIC_START; i <= IRQ_SIC_END; i++) {
258 set_irq_chip(i, &sic_chip);
259 set_irq_handler(i, handle_level_irq);
260 set_irq_flags(i, IRQF_VALID | IRQF_PROBE);
261 }
262
263 set_irq_chained_handler(IRQ_CP_CPPLDINT, sic_handle_irq);
264 }
265
266 /*
267 * Clock handling
268 */
269 #define CM_LOCK (IO_ADDRESS(INTEGRATOR_HDR_BASE)+INTEGRATOR_HDR_LOCK_OFFSET)
270 #define CM_AUXOSC (IO_ADDRESS(INTEGRATOR_HDR_BASE)+0x1c)
271
272 static const struct icst525_params cp_auxvco_params = {
273 .ref = 24000,
274 .vco_max = 320000,
275 .vd_min = 8,
276 .vd_max = 263,
277 .rd_min = 3,
278 .rd_max = 65,
279 };
280
281 static void cp_auxvco_set(struct clk *clk, struct icst525_vco vco)
282 {
283 u32 val;
284
285 val = readl(CM_AUXOSC) & ~0x7ffff;
286 val |= vco.v | (vco.r << 9) | (vco.s << 16);
287
288 writel(0xa05f, CM_LOCK);
289 writel(val, CM_AUXOSC);
290 writel(0, CM_LOCK);
291 }
292
293 static struct clk cp_clcd_clk = {
294 .name = "CLCDCLK",
295 .params = &cp_auxvco_params,
296 .setvco = cp_auxvco_set,
297 };
298
299 static struct clk cp_mmci_clk = {
300 .name = "MCLK",
301 .rate = 14745600,
302 };
303
304 /*
305 * Flash handling.
306 */
307 static int intcp_flash_init(void)
308 {
309 u32 val;
310
311 val = readl(INTCP_VA_CTRL_BASE + INTCP_FLASHPROG);
312 val |= CINTEGRATOR_FLASHPROG_FLWREN;
313 writel(val, INTCP_VA_CTRL_BASE + INTCP_FLASHPROG);
314
315 return 0;
316 }
317
318 static void intcp_flash_exit(void)
319 {
320 u32 val;
321
322 val = readl(INTCP_VA_CTRL_BASE + INTCP_FLASHPROG);
323 val &= ~(CINTEGRATOR_FLASHPROG_FLVPPEN|CINTEGRATOR_FLASHPROG_FLWREN);
324 writel(val, INTCP_VA_CTRL_BASE + INTCP_FLASHPROG);
325 }
326
327 static void intcp_flash_set_vpp(int on)
328 {
329 u32 val;
330
331 val = readl(INTCP_VA_CTRL_BASE + INTCP_FLASHPROG);
332 if (on)
333 val |= CINTEGRATOR_FLASHPROG_FLVPPEN;
334 else
335 val &= ~CINTEGRATOR_FLASHPROG_FLVPPEN;
336 writel(val, INTCP_VA_CTRL_BASE + INTCP_FLASHPROG);
337 }
338
339 static struct flash_platform_data intcp_flash_data = {
340 .map_name = "cfi_probe",
341 .width = 4,
342 .init = intcp_flash_init,
343 .exit = intcp_flash_exit,
344 .set_vpp = intcp_flash_set_vpp,
345 };
346
347 static struct resource intcp_flash_resource = {
348 .start = INTCP_PA_FLASH_BASE,
349 .end = INTCP_PA_FLASH_BASE + INTCP_FLASH_SIZE - 1,
350 .flags = IORESOURCE_MEM,
351 };
352
353 static struct platform_device intcp_flash_device = {
354 .name = "armflash",
355 .id = 0,
356 .dev = {
357 .platform_data = &intcp_flash_data,
358 },
359 .num_resources = 1,
360 .resource = &intcp_flash_resource,
361 };
362
363 static struct resource smc91x_resources[] = {
364 [0] = {
365 .start = INTCP_PA_ETH_BASE,
366 .end = INTCP_PA_ETH_BASE + INTCP_ETH_SIZE - 1,
367 .flags = IORESOURCE_MEM,
368 },
369 [1] = {
370 .start = IRQ_CP_ETHINT,
371 .end = IRQ_CP_ETHINT,
372 .flags = IORESOURCE_IRQ,
373 },
374 };
375
376 static struct platform_device smc91x_device = {
377 .name = "smc91x",
378 .id = 0,
379 .num_resources = ARRAY_SIZE(smc91x_resources),
380 .resource = smc91x_resources,
381 };
382
383 static struct platform_device *intcp_devs[] __initdata = {
384 &intcp_flash_device,
385 &smc91x_device,
386 };
387
388 /*
389 * It seems that the card insertion interrupt remains active after
390 * we've acknowledged it. We therefore ignore the interrupt, and
391 * rely on reading it from the SIC. This also means that we must
392 * clear the latched interrupt.
393 */
394 static unsigned int mmc_status(struct device *dev)
395 {
396 unsigned int status = readl(0xfca00004);
397 writel(8, 0xfcb00008);
398
399 return status & 8;
400 }
401
402 static struct mmc_platform_data mmc_data = {
403 .ocr_mask = MMC_VDD_32_33|MMC_VDD_33_34,
404 .status = mmc_status,
405 };
406
407 static struct amba_device mmc_device = {
408 .dev = {
409 .bus_id = "mb:1c",
410 .platform_data = &mmc_data,
411 },
412 .res = {
413 .start = INTCP_PA_MMC_BASE,
414 .end = INTCP_PA_MMC_BASE + SZ_4K - 1,
415 .flags = IORESOURCE_MEM,
416 },
417 .irq = { IRQ_CP_MMCIINT0, IRQ_CP_MMCIINT1 },
418 .periphid = 0,
419 };
420
421 static struct amba_device aaci_device = {
422 .dev = {
423 .bus_id = "mb:1d",
424 },
425 .res = {
426 .start = INTCP_PA_AACI_BASE,
427 .end = INTCP_PA_AACI_BASE + SZ_4K - 1,
428 .flags = IORESOURCE_MEM,
429 },
430 .irq = { IRQ_CP_AACIINT, NO_IRQ },
431 .periphid = 0,
432 };
433
434
435 /*
436 * CLCD support
437 */
438 static struct clcd_panel vga = {
439 .mode = {
440 .name = "VGA",
441 .refresh = 60,
442 .xres = 640,
443 .yres = 480,
444 .pixclock = 39721,
445 .left_margin = 40,
446 .right_margin = 24,
447 .upper_margin = 32,
448 .lower_margin = 11,
449 .hsync_len = 96,
450 .vsync_len = 2,
451 .sync = 0,
452 .vmode = FB_VMODE_NONINTERLACED,
453 },
454 .width = -1,
455 .height = -1,
456 .tim2 = TIM2_BCD | TIM2_IPC,
457 .cntl = CNTL_LCDTFT | CNTL_LCDVCOMP(1),
458 .bpp = 16,
459 .grayscale = 0,
460 };
461
462 /*
463 * Ensure VGA is selected.
464 */
465 static void cp_clcd_enable(struct clcd_fb *fb)
466 {
467 u32 val;
468
469 if (fb->fb.var.bits_per_pixel <= 8)
470 val = CM_CTRL_LCDMUXSEL_VGA_8421BPP;
471 else if (fb->fb.var.bits_per_pixel <= 16)
472 val = CM_CTRL_LCDMUXSEL_VGA_16BPP
473 | CM_CTRL_LCDEN0 | CM_CTRL_LCDEN1
474 | CM_CTRL_STATIC1 | CM_CTRL_STATIC2;
475 else
476 val = 0; /* no idea for this, don't trust the docs */
477
478 cm_control(CM_CTRL_LCDMUXSEL_MASK|
479 CM_CTRL_LCDEN0|
480 CM_CTRL_LCDEN1|
481 CM_CTRL_STATIC1|
482 CM_CTRL_STATIC2|
483 CM_CTRL_STATIC|
484 CM_CTRL_n24BITEN, val);
485 }
486
487 static unsigned long framesize = SZ_1M;
488
489 static int cp_clcd_setup(struct clcd_fb *fb)
490 {
491 dma_addr_t dma;
492
493 fb->panel = &vga;
494
495 fb->fb.screen_base = dma_alloc_writecombine(&fb->dev->dev, framesize,
496 &dma, GFP_KERNEL);
497 if (!fb->fb.screen_base) {
498 printk(KERN_ERR "CLCD: unable to map framebuffer\n");
499 return -ENOMEM;
500 }
501
502 fb->fb.fix.smem_start = dma;
503 fb->fb.fix.smem_len = framesize;
504
505 return 0;
506 }
507
508 static int cp_clcd_mmap(struct clcd_fb *fb, struct vm_area_struct *vma)
509 {
510 return dma_mmap_writecombine(&fb->dev->dev, vma,
511 fb->fb.screen_base,
512 fb->fb.fix.smem_start,
513 fb->fb.fix.smem_len);
514 }
515
516 static void cp_clcd_remove(struct clcd_fb *fb)
517 {
518 dma_free_writecombine(&fb->dev->dev, fb->fb.fix.smem_len,
519 fb->fb.screen_base, fb->fb.fix.smem_start);
520 }
521
522 static struct clcd_board clcd_data = {
523 .name = "Integrator/CP",
524 .check = clcdfb_check,
525 .decode = clcdfb_decode,
526 .enable = cp_clcd_enable,
527 .setup = cp_clcd_setup,
528 .mmap = cp_clcd_mmap,
529 .remove = cp_clcd_remove,
530 };
531
532 static struct amba_device clcd_device = {
533 .dev = {
534 .bus_id = "mb:c0",
535 .coherent_dma_mask = ~0,
536 .platform_data = &clcd_data,
537 },
538 .res = {
539 .start = INTCP_PA_CLCD_BASE,
540 .end = INTCP_PA_CLCD_BASE + SZ_4K - 1,
541 .flags = IORESOURCE_MEM,
542 },
543 .dma_mask = ~0,
544 .irq = { IRQ_CP_CLCDCINT, NO_IRQ },
545 .periphid = 0,
546 };
547
548 static struct amba_device *amba_devs[] __initdata = {
549 &mmc_device,
550 &aaci_device,
551 &clcd_device,
552 };
553
554 static void __init intcp_init(void)
555 {
556 int i;
557
558 clk_register(&cp_clcd_clk);
559 clk_register(&cp_mmci_clk);
560
561 platform_add_devices(intcp_devs, ARRAY_SIZE(intcp_devs));
562
563 for (i = 0; i < ARRAY_SIZE(amba_devs); i++) {
564 struct amba_device *d = amba_devs[i];
565 amba_device_register(d, &iomem_resource);
566 }
567 }
568
569 #define TIMER_CTRL_IE (1 << 5) /* Interrupt Enable */
570
571 static void __init intcp_timer_init(void)
572 {
573 integrator_time_init(1000000 / HZ, TIMER_CTRL_IE);
574 }
575
576 static struct sys_timer cp_timer = {
577 .init = intcp_timer_init,
578 .offset = integrator_gettimeoffset,
579 };
580
581 MACHINE_START(CINTEGRATOR, "ARM-IntegratorCP")
582 /* Maintainer: ARM Ltd/Deep Blue Solutions Ltd */
583 .phys_io = 0x16000000,
584 .io_pg_offst = ((0xf1600000) >> 18) & 0xfffc,
585 .boot_params = 0x00000100,
586 .map_io = intcp_map_io,
587 .init_irq = intcp_init_irq,
588 .timer = &cp_timer,
589 .init_machine = intcp_init,
590 MACHINE_END
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