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[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / arch / arm / mach-integrator / integrator_cp.c
blobe9327da1382e7a5d5f56c55b09f6bc829e02f290
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/string.h>
17 #include <linux/sysdev.h>
18 #include <linux/amba/bus.h>
19 #include <linux/amba/kmi.h>
20 #include <linux/amba/clcd.h>
21 #include <linux/amba/mmci.h>
22 #include <linux/io.h>
23 #include <linux/gfp.h>
24 #include <linux/clkdev.h>
25
26 #include <mach/hardware.h>
27 #include <mach/platform.h>
28 #include <asm/irq.h>
29 #include <asm/setup.h>
30 #include <asm/mach-types.h>
31 #include <asm/hardware/arm_timer.h>
32 #include <asm/hardware/icst.h>
33
34 #include <mach/cm.h>
35 #include <mach/lm.h>
36
37 #include <asm/mach/arch.h>
38 #include <asm/mach/flash.h>
39 #include <asm/mach/irq.h>
40 #include <asm/mach/map.h>
41 #include <asm/mach/time.h>
42
43 #include <asm/hardware/timer-sp.h>
44
45 #include "common.h"
46
47 #define INTCP_PA_FLASH_BASE 0x24000000
48 #define INTCP_FLASH_SIZE SZ_32M
49
50 #define INTCP_PA_CLCD_BASE 0xc0000000
51
52 #define INTCP_VA_CIC_BASE IO_ADDRESS(INTEGRATOR_HDR_BASE + 0x40)
53 #define INTCP_VA_PIC_BASE IO_ADDRESS(INTEGRATOR_IC_BASE)
54 #define INTCP_VA_SIC_BASE IO_ADDRESS(INTEGRATOR_CP_SIC_BASE)
55
56 #define INTCP_ETH_SIZE 0x10
57
58 #define INTCP_VA_CTRL_BASE IO_ADDRESS(INTEGRATOR_CP_CTL_BASE)
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 * fc900000 c9000000 GPIO
74 * fca00000 ca000000 SIC
75 * fcb00000 cb000000 CP system control
76 */
77
78 static struct map_desc intcp_io_desc[] __initdata = {
79 {
80 .virtual = IO_ADDRESS(INTEGRATOR_HDR_BASE),
81 .pfn = __phys_to_pfn(INTEGRATOR_HDR_BASE),
82 .length = SZ_4K,
83 .type = MT_DEVICE
84 }, {
85 .virtual = IO_ADDRESS(INTEGRATOR_SC_BASE),
86 .pfn = __phys_to_pfn(INTEGRATOR_SC_BASE),
87 .length = SZ_4K,
88 .type = MT_DEVICE
89 }, {
90 .virtual = IO_ADDRESS(INTEGRATOR_EBI_BASE),
91 .pfn = __phys_to_pfn(INTEGRATOR_EBI_BASE),
92 .length = SZ_4K,
93 .type = MT_DEVICE
94 }, {
95 .virtual = IO_ADDRESS(INTEGRATOR_CT_BASE),
96 .pfn = __phys_to_pfn(INTEGRATOR_CT_BASE),
97 .length = SZ_4K,
98 .type = MT_DEVICE
99 }, {
100 .virtual = IO_ADDRESS(INTEGRATOR_IC_BASE),
101 .pfn = __phys_to_pfn(INTEGRATOR_IC_BASE),
102 .length = SZ_4K,
103 .type = MT_DEVICE
104 }, {
105 .virtual = IO_ADDRESS(INTEGRATOR_UART0_BASE),
106 .pfn = __phys_to_pfn(INTEGRATOR_UART0_BASE),
107 .length = SZ_4K,
108 .type = MT_DEVICE
109 }, {
110 .virtual = IO_ADDRESS(INTEGRATOR_UART1_BASE),
111 .pfn = __phys_to_pfn(INTEGRATOR_UART1_BASE),
112 .length = SZ_4K,
113 .type = MT_DEVICE
114 }, {
115 .virtual = IO_ADDRESS(INTEGRATOR_DBG_BASE),
116 .pfn = __phys_to_pfn(INTEGRATOR_DBG_BASE),
117 .length = SZ_4K,
118 .type = MT_DEVICE
119 }, {
120 .virtual = IO_ADDRESS(INTEGRATOR_CP_GPIO_BASE),
121 .pfn = __phys_to_pfn(INTEGRATOR_CP_GPIO_BASE),
122 .length = SZ_4K,
123 .type = MT_DEVICE
124 }, {
125 .virtual = IO_ADDRESS(INTEGRATOR_CP_SIC_BASE),
126 .pfn = __phys_to_pfn(INTEGRATOR_CP_SIC_BASE),
127 .length = SZ_4K,
128 .type = MT_DEVICE
129 }, {
130 .virtual = IO_ADDRESS(INTEGRATOR_CP_CTL_BASE),
131 .pfn = __phys_to_pfn(INTEGRATOR_CP_CTL_BASE),
132 .length = SZ_4K,
133 .type = MT_DEVICE
134 }
135 };
136
137 static void __init intcp_map_io(void)
138 {
139 iotable_init(intcp_io_desc, ARRAY_SIZE(intcp_io_desc));
140 }
141
142 #define cic_writel __raw_writel
143 #define cic_readl __raw_readl
144 #define pic_writel __raw_writel
145 #define pic_readl __raw_readl
146 #define sic_writel __raw_writel
147 #define sic_readl __raw_readl
148
149 static void cic_mask_irq(struct irq_data *d)
150 {
151 unsigned int irq = d->irq - IRQ_CIC_START;
152 cic_writel(1 << irq, INTCP_VA_CIC_BASE + IRQ_ENABLE_CLEAR);
153 }
154
155 static void cic_unmask_irq(struct irq_data *d)
156 {
157 unsigned int irq = d->irq - IRQ_CIC_START;
158 cic_writel(1 << irq, INTCP_VA_CIC_BASE + IRQ_ENABLE_SET);
159 }
160
161 static struct irq_chip cic_chip = {
162 .name = "CIC",
163 .irq_ack = cic_mask_irq,
164 .irq_mask = cic_mask_irq,
165 .irq_unmask = cic_unmask_irq,
166 };
167
168 static void pic_mask_irq(struct irq_data *d)
169 {
170 unsigned int irq = d->irq - IRQ_PIC_START;
171 pic_writel(1 << irq, INTCP_VA_PIC_BASE + IRQ_ENABLE_CLEAR);
172 }
173
174 static void pic_unmask_irq(struct irq_data *d)
175 {
176 unsigned int irq = d->irq - IRQ_PIC_START;
177 pic_writel(1 << irq, INTCP_VA_PIC_BASE + IRQ_ENABLE_SET);
178 }
179
180 static struct irq_chip pic_chip = {
181 .name = "PIC",
182 .irq_ack = pic_mask_irq,
183 .irq_mask = pic_mask_irq,
184 .irq_unmask = pic_unmask_irq,
185 };
186
187 static void sic_mask_irq(struct irq_data *d)
188 {
189 unsigned int irq = d->irq - IRQ_SIC_START;
190 sic_writel(1 << irq, INTCP_VA_SIC_BASE + IRQ_ENABLE_CLEAR);
191 }
192
193 static void sic_unmask_irq(struct irq_data *d)
194 {
195 unsigned int irq = d->irq - IRQ_SIC_START;
196 sic_writel(1 << irq, INTCP_VA_SIC_BASE + IRQ_ENABLE_SET);
197 }
198
199 static struct irq_chip sic_chip = {
200 .name = "SIC",
201 .irq_ack = sic_mask_irq,
202 .irq_mask = sic_mask_irq,
203 .irq_unmask = sic_unmask_irq,
204 };
205
206 static void
207 sic_handle_irq(unsigned int irq, struct irq_desc *desc)
208 {
209 unsigned long status = sic_readl(INTCP_VA_SIC_BASE + IRQ_STATUS);
210
211 if (status == 0) {
212 do_bad_IRQ(irq, desc);
213 return;
214 }
215
216 do {
217 irq = ffs(status) - 1;
218 status &= ~(1 << irq);
219
220 irq += IRQ_SIC_START;
221
222 generic_handle_irq(irq);
223 } while (status);
224 }
225
226 static void __init intcp_init_irq(void)
227 {
228 unsigned int i;
229
230 /*
231 * Disable all interrupt sources
232 */
233 pic_writel(0xffffffff, INTCP_VA_PIC_BASE + IRQ_ENABLE_CLEAR);
234 pic_writel(0xffffffff, INTCP_VA_PIC_BASE + FIQ_ENABLE_CLEAR);
235
236 for (i = IRQ_PIC_START; i <= IRQ_PIC_END; i++) {
237 if (i == 11)
238 i = 22;
239 if (i == 29)
240 break;
241 set_irq_chip(i, &pic_chip);
242 set_irq_handler(i, handle_level_irq);
243 set_irq_flags(i, IRQF_VALID | IRQF_PROBE);
244 }
245
246 cic_writel(0xffffffff, INTCP_VA_CIC_BASE + IRQ_ENABLE_CLEAR);
247 cic_writel(0xffffffff, INTCP_VA_CIC_BASE + FIQ_ENABLE_CLEAR);
248
249 for (i = IRQ_CIC_START; i <= IRQ_CIC_END; i++) {
250 set_irq_chip(i, &cic_chip);
251 set_irq_handler(i, handle_level_irq);
252 set_irq_flags(i, IRQF_VALID);
253 }
254
255 sic_writel(0x00000fff, INTCP_VA_SIC_BASE + IRQ_ENABLE_CLEAR);
256 sic_writel(0x00000fff, INTCP_VA_SIC_BASE + FIQ_ENABLE_CLEAR);
257
258 for (i = IRQ_SIC_START; i <= IRQ_SIC_END; i++) {
259 set_irq_chip(i, &sic_chip);
260 set_irq_handler(i, handle_level_irq);
261 set_irq_flags(i, IRQF_VALID | IRQF_PROBE);
262 }
263
264 set_irq_chained_handler(IRQ_CP_CPPLDINT, sic_handle_irq);
265 }
266
267 /*
268 * Clock handling
269 */
270 #define CM_LOCK (__io_address(INTEGRATOR_HDR_BASE)+INTEGRATOR_HDR_LOCK_OFFSET)
271 #define CM_AUXOSC (__io_address(INTEGRATOR_HDR_BASE)+0x1c)
272
273 static const struct icst_params cp_auxvco_params = {
274 .ref = 24000000,
275 .vco_max = ICST525_VCO_MAX_5V,
276 .vco_min = ICST525_VCO_MIN,
277 .vd_min = 8,
278 .vd_max = 263,
279 .rd_min = 3,
280 .rd_max = 65,
281 .s2div = icst525_s2div,
282 .idx2s = icst525_idx2s,
283 };
284
285 static void cp_auxvco_set(struct clk *clk, struct icst_vco vco)
286 {
287 u32 val;
288
289 val = readl(clk->vcoreg) & ~0x7ffff;
290 val |= vco.v | (vco.r << 9) | (vco.s << 16);
291
292 writel(0xa05f, CM_LOCK);
293 writel(val, clk->vcoreg);
294 writel(0, CM_LOCK);
295 }
296
297 static const struct clk_ops cp_auxclk_ops = {
298 .round = icst_clk_round,
299 .set = icst_clk_set,
300 .setvco = cp_auxvco_set,
301 };
302
303 static struct clk cp_auxclk = {
304 .ops = &cp_auxclk_ops,
305 .params = &cp_auxvco_params,
306 .vcoreg = CM_AUXOSC,
307 };
308
309 static struct clk_lookup cp_lookups[] = {
310 { /* CLCD */
311 .dev_id = "mb:c0",
312 .clk = &cp_auxclk,
313 },
314 };
315
316 /*
317 * Flash handling.
318 */
319 static int intcp_flash_init(void)
320 {
321 u32 val;
322
323 val = readl(INTCP_VA_CTRL_BASE + INTCP_FLASHPROG);
324 val |= CINTEGRATOR_FLASHPROG_FLWREN;
325 writel(val, INTCP_VA_CTRL_BASE + INTCP_FLASHPROG);
326
327 return 0;
328 }
329
330 static void intcp_flash_exit(void)
331 {
332 u32 val;
333
334 val = readl(INTCP_VA_CTRL_BASE + INTCP_FLASHPROG);
335 val &= ~(CINTEGRATOR_FLASHPROG_FLVPPEN|CINTEGRATOR_FLASHPROG_FLWREN);
336 writel(val, INTCP_VA_CTRL_BASE + INTCP_FLASHPROG);
337 }
338
339 static void intcp_flash_set_vpp(int on)
340 {
341 u32 val;
342
343 val = readl(INTCP_VA_CTRL_BASE + INTCP_FLASHPROG);
344 if (on)
345 val |= CINTEGRATOR_FLASHPROG_FLVPPEN;
346 else
347 val &= ~CINTEGRATOR_FLASHPROG_FLVPPEN;
348 writel(val, INTCP_VA_CTRL_BASE + INTCP_FLASHPROG);
349 }
350
351 static struct flash_platform_data intcp_flash_data = {
352 .map_name = "cfi_probe",
353 .width = 4,
354 .init = intcp_flash_init,
355 .exit = intcp_flash_exit,
356 .set_vpp = intcp_flash_set_vpp,
357 };
358
359 static struct resource intcp_flash_resource = {
360 .start = INTCP_PA_FLASH_BASE,
361 .end = INTCP_PA_FLASH_BASE + INTCP_FLASH_SIZE - 1,
362 .flags = IORESOURCE_MEM,
363 };
364
365 static struct platform_device intcp_flash_device = {
366 .name = "armflash",
367 .id = 0,
368 .dev = {
369 .platform_data = &intcp_flash_data,
370 },
371 .num_resources = 1,
372 .resource = &intcp_flash_resource,
373 };
374
375 static struct resource smc91x_resources[] = {
376 [0] = {
377 .start = INTEGRATOR_CP_ETH_BASE,
378 .end = INTEGRATOR_CP_ETH_BASE + INTCP_ETH_SIZE - 1,
379 .flags = IORESOURCE_MEM,
380 },
381 [1] = {
382 .start = IRQ_CP_ETHINT,
383 .end = IRQ_CP_ETHINT,
384 .flags = IORESOURCE_IRQ,
385 },
386 };
387
388 static struct platform_device smc91x_device = {
389 .name = "smc91x",
390 .id = 0,
391 .num_resources = ARRAY_SIZE(smc91x_resources),
392 .resource = smc91x_resources,
393 };
394
395 static struct platform_device *intcp_devs[] __initdata = {
396 &intcp_flash_device,
397 &smc91x_device,
398 };
399
400 /*
401 * It seems that the card insertion interrupt remains active after
402 * we've acknowledged it. We therefore ignore the interrupt, and
403 * rely on reading it from the SIC. This also means that we must
404 * clear the latched interrupt.
405 */
406 static unsigned int mmc_status(struct device *dev)
407 {
408 unsigned int status = readl(IO_ADDRESS(0xca000000 + 4));
409 writel(8, IO_ADDRESS(INTEGRATOR_CP_CTL_BASE + 8));
410
411 return status & 8;
412 }
413
414 static struct mmci_platform_data mmc_data = {
415 .ocr_mask = MMC_VDD_32_33|MMC_VDD_33_34,
416 .status = mmc_status,
417 .gpio_wp = -1,
418 .gpio_cd = -1,
419 };
420
421 static struct amba_device mmc_device = {
422 .dev = {
423 .init_name = "mb:1c",
424 .platform_data = &mmc_data,
425 },
426 .res = {
427 .start = INTEGRATOR_CP_MMC_BASE,
428 .end = INTEGRATOR_CP_MMC_BASE + SZ_4K - 1,
429 .flags = IORESOURCE_MEM,
430 },
431 .irq = { IRQ_CP_MMCIINT0, IRQ_CP_MMCIINT1 },
432 .periphid = 0,
433 };
434
435 static struct amba_device aaci_device = {
436 .dev = {
437 .init_name = "mb:1d",
438 },
439 .res = {
440 .start = INTEGRATOR_CP_AACI_BASE,
441 .end = INTEGRATOR_CP_AACI_BASE + SZ_4K - 1,
442 .flags = IORESOURCE_MEM,
443 },
444 .irq = { IRQ_CP_AACIINT, NO_IRQ },
445 .periphid = 0,
446 };
447
448
449 /*
450 * CLCD support
451 */
452 static struct clcd_panel vga = {
453 .mode = {
454 .name = "VGA",
455 .refresh = 60,
456 .xres = 640,
457 .yres = 480,
458 .pixclock = 39721,
459 .left_margin = 40,
460 .right_margin = 24,
461 .upper_margin = 32,
462 .lower_margin = 11,
463 .hsync_len = 96,
464 .vsync_len = 2,
465 .sync = 0,
466 .vmode = FB_VMODE_NONINTERLACED,
467 },
468 .width = -1,
469 .height = -1,
470 .tim2 = TIM2_BCD | TIM2_IPC,
471 .cntl = CNTL_LCDTFT | CNTL_LCDVCOMP(1),
472 .bpp = 16,
473 .grayscale = 0,
474 };
475
476 /*
477 * Ensure VGA is selected.
478 */
479 static void cp_clcd_enable(struct clcd_fb *fb)
480 {
481 u32 val;
482
483 if (fb->fb.var.bits_per_pixel <= 8)
484 val = CM_CTRL_LCDMUXSEL_VGA_8421BPP;
485 else if (fb->fb.var.bits_per_pixel <= 16)
486 val = CM_CTRL_LCDMUXSEL_VGA_16BPP
487 | CM_CTRL_LCDEN0 | CM_CTRL_LCDEN1
488 | CM_CTRL_STATIC1 | CM_CTRL_STATIC2;
489 else
490 val = 0; /* no idea for this, don't trust the docs */
491
492 cm_control(CM_CTRL_LCDMUXSEL_MASK|
493 CM_CTRL_LCDEN0|
494 CM_CTRL_LCDEN1|
495 CM_CTRL_STATIC1|
496 CM_CTRL_STATIC2|
497 CM_CTRL_STATIC|
498 CM_CTRL_n24BITEN, val);
499 }
500
501 static unsigned long framesize = SZ_1M;
502
503 static int cp_clcd_setup(struct clcd_fb *fb)
504 {
505 dma_addr_t dma;
506
507 fb->panel = &vga;
508
509 fb->fb.screen_base = dma_alloc_writecombine(&fb->dev->dev, framesize,
510 &dma, GFP_KERNEL);
511 if (!fb->fb.screen_base) {
512 printk(KERN_ERR "CLCD: unable to map framebuffer\n");
513 return -ENOMEM;
514 }
515
516 fb->fb.fix.smem_start = dma;
517 fb->fb.fix.smem_len = framesize;
518
519 return 0;
520 }
521
522 static int cp_clcd_mmap(struct clcd_fb *fb, struct vm_area_struct *vma)
523 {
524 return dma_mmap_writecombine(&fb->dev->dev, vma,
525 fb->fb.screen_base,
526 fb->fb.fix.smem_start,
527 fb->fb.fix.smem_len);
528 }
529
530 static void cp_clcd_remove(struct clcd_fb *fb)
531 {
532 dma_free_writecombine(&fb->dev->dev, fb->fb.fix.smem_len,
533 fb->fb.screen_base, fb->fb.fix.smem_start);
534 }
535
536 static struct clcd_board clcd_data = {
537 .name = "Integrator/CP",
538 .check = clcdfb_check,
539 .decode = clcdfb_decode,
540 .enable = cp_clcd_enable,
541 .setup = cp_clcd_setup,
542 .mmap = cp_clcd_mmap,
543 .remove = cp_clcd_remove,
544 };
545
546 static struct amba_device clcd_device = {
547 .dev = {
548 .init_name = "mb:c0",
549 .coherent_dma_mask = ~0,
550 .platform_data = &clcd_data,
551 },
552 .res = {
553 .start = INTCP_PA_CLCD_BASE,
554 .end = INTCP_PA_CLCD_BASE + SZ_4K - 1,
555 .flags = IORESOURCE_MEM,
556 },
557 .dma_mask = ~0,
558 .irq = { IRQ_CP_CLCDCINT, NO_IRQ },
559 .periphid = 0,
560 };
561
562 static struct amba_device *amba_devs[] __initdata = {
563 &mmc_device,
564 &aaci_device,
565 &clcd_device,
566 };
567
568 static void __init intcp_init(void)
569 {
570 int i;
571
572 clkdev_add_table(cp_lookups, ARRAY_SIZE(cp_lookups));
573 platform_add_devices(intcp_devs, ARRAY_SIZE(intcp_devs));
574
575 for (i = 0; i < ARRAY_SIZE(amba_devs); i++) {
576 struct amba_device *d = amba_devs[i];
577 amba_device_register(d, &iomem_resource);
578 }
579 }
580
581 #define TIMER0_VA_BASE __io_address(INTEGRATOR_TIMER0_BASE)
582 #define TIMER1_VA_BASE __io_address(INTEGRATOR_TIMER1_BASE)
583 #define TIMER2_VA_BASE __io_address(INTEGRATOR_TIMER2_BASE)
584
585 static void __init intcp_timer_init(void)
586 {
587 writel(0, TIMER0_VA_BASE + TIMER_CTRL);
588 writel(0, TIMER1_VA_BASE + TIMER_CTRL);
589 writel(0, TIMER2_VA_BASE + TIMER_CTRL);
590
591 sp804_clocksource_init(TIMER2_VA_BASE);
592 sp804_clockevents_init(TIMER1_VA_BASE, IRQ_TIMERINT1);
593 }
594
595 static struct sys_timer cp_timer = {
596 .init = intcp_timer_init,
597 };
598
599 MACHINE_START(CINTEGRATOR, "ARM-IntegratorCP")
600 /* Maintainer: ARM Ltd/Deep Blue Solutions Ltd */
601 .boot_params = 0x00000100,
602 .map_io = intcp_map_io,
603 .reserve = integrator_reserve,
604 .init_irq = intcp_init_irq,
605 .timer = &cp_timer,
606 .init_machine = intcp_init,
607 MACHINE_END
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree