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[ARM] 3980/1: extend the ARM Versatile sched_clock implementation from 32 to 63 bit
[linux-2.6/kmemtrace.git] / arch / arm / mach-versatile / core.c
blob998b398df30e97b1cfe0bc8e02e3741e1f61f144
1 /*
2 * linux/arch/arm/mach-versatile/core.c
3 *
4 * Copyright (C) 1999 - 2003 ARM Limited
5 * Copyright (C) 2000 Deep Blue Solutions Ltd
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 */
21 #include <linux/init.h>
22 #include <linux/device.h>
23 #include <linux/dma-mapping.h>
24 #include <linux/platform_device.h>
25 #include <linux/sysdev.h>
26 #include <linux/interrupt.h>
27 #include <linux/amba/bus.h>
28 #include <linux/amba/clcd.h>
29
30 #include <asm/cnt32_to_63.h>
31 #include <asm/system.h>
32 #include <asm/hardware.h>
33 #include <asm/io.h>
34 #include <asm/irq.h>
35 #include <asm/leds.h>
36 #include <asm/hardware/arm_timer.h>
37 #include <asm/hardware/icst307.h>
38 #include <asm/hardware/vic.h>
39 #include <asm/mach-types.h>
40
41 #include <asm/mach/arch.h>
42 #include <asm/mach/flash.h>
43 #include <asm/mach/irq.h>
44 #include <asm/mach/time.h>
45 #include <asm/mach/map.h>
46 #include <asm/mach/mmc.h>
47
48 #include "core.h"
49 #include "clock.h"
50
51 /*
52 * All IO addresses are mapped onto VA 0xFFFx.xxxx, where x.xxxx
53 * is the (PA >> 12).
54 *
55 * Setup a VA for the Versatile Vectored Interrupt Controller.
56 */
57 #define __io_address(n) __io(IO_ADDRESS(n))
58 #define VA_VIC_BASE __io_address(VERSATILE_VIC_BASE)
59 #define VA_SIC_BASE __io_address(VERSATILE_SIC_BASE)
60
61 static void sic_mask_irq(unsigned int irq)
62 {
63 irq -= IRQ_SIC_START;
64 writel(1 << irq, VA_SIC_BASE + SIC_IRQ_ENABLE_CLEAR);
65 }
66
67 static void sic_unmask_irq(unsigned int irq)
68 {
69 irq -= IRQ_SIC_START;
70 writel(1 << irq, VA_SIC_BASE + SIC_IRQ_ENABLE_SET);
71 }
72
73 static struct irq_chip sic_chip = {
74 .name = "SIC",
75 .ack = sic_mask_irq,
76 .mask = sic_mask_irq,
77 .unmask = sic_unmask_irq,
78 };
79
80 static void
81 sic_handle_irq(unsigned int irq, struct irqdesc *desc)
82 {
83 unsigned long status = readl(VA_SIC_BASE + SIC_IRQ_STATUS);
84
85 if (status == 0) {
86 do_bad_IRQ(irq, desc);
87 return;
88 }
89
90 do {
91 irq = ffs(status) - 1;
92 status &= ~(1 << irq);
93
94 irq += IRQ_SIC_START;
95
96 desc = irq_desc + irq;
97 desc_handle_irq(irq, desc);
98 } while (status);
99 }
100
101 #if 1
102 #define IRQ_MMCI0A IRQ_VICSOURCE22
103 #define IRQ_AACI IRQ_VICSOURCE24
104 #define IRQ_ETH IRQ_VICSOURCE25
105 #define PIC_MASK 0xFFD00000
106 #else
107 #define IRQ_MMCI0A IRQ_SIC_MMCI0A
108 #define IRQ_AACI IRQ_SIC_AACI
109 #define IRQ_ETH IRQ_SIC_ETH
110 #define PIC_MASK 0
111 #endif
112
113 void __init versatile_init_irq(void)
114 {
115 unsigned int i;
116
117 vic_init(VA_VIC_BASE, IRQ_VIC_START, ~0);
118
119 set_irq_chained_handler(IRQ_VICSOURCE31, sic_handle_irq);
120
121 /* Do second interrupt controller */
122 writel(~0, VA_SIC_BASE + SIC_IRQ_ENABLE_CLEAR);
123
124 for (i = IRQ_SIC_START; i <= IRQ_SIC_END; i++) {
125 if ((PIC_MASK & (1 << (i - IRQ_SIC_START))) == 0) {
126 set_irq_chip(i, &sic_chip);
127 set_irq_handler(i, do_level_IRQ);
128 set_irq_flags(i, IRQF_VALID | IRQF_PROBE);
129 }
130 }
131
132 /*
133 * Interrupts on secondary controller from 0 to 8 are routed to
134 * source 31 on PIC.
135 * Interrupts from 21 to 31 are routed directly to the VIC on
136 * the corresponding number on primary controller. This is controlled
137 * by setting PIC_ENABLEx.
138 */
139 writel(PIC_MASK, VA_SIC_BASE + SIC_INT_PIC_ENABLE);
140 }
141
142 static struct map_desc versatile_io_desc[] __initdata = {
143 {
144 .virtual = IO_ADDRESS(VERSATILE_SYS_BASE),
145 .pfn = __phys_to_pfn(VERSATILE_SYS_BASE),
146 .length = SZ_4K,
147 .type = MT_DEVICE
148 }, {
149 .virtual = IO_ADDRESS(VERSATILE_SIC_BASE),
150 .pfn = __phys_to_pfn(VERSATILE_SIC_BASE),
151 .length = SZ_4K,
152 .type = MT_DEVICE
153 }, {
154 .virtual = IO_ADDRESS(VERSATILE_VIC_BASE),
155 .pfn = __phys_to_pfn(VERSATILE_VIC_BASE),
156 .length = SZ_4K,
157 .type = MT_DEVICE
158 }, {
159 .virtual = IO_ADDRESS(VERSATILE_SCTL_BASE),
160 .pfn = __phys_to_pfn(VERSATILE_SCTL_BASE),
161 .length = SZ_4K * 9,
162 .type = MT_DEVICE
163 },
164 #ifdef CONFIG_MACH_VERSATILE_AB
165 {
166 .virtual = IO_ADDRESS(VERSATILE_GPIO0_BASE),
167 .pfn = __phys_to_pfn(VERSATILE_GPIO0_BASE),
168 .length = SZ_4K,
169 .type = MT_DEVICE
170 }, {
171 .virtual = IO_ADDRESS(VERSATILE_IB2_BASE),
172 .pfn = __phys_to_pfn(VERSATILE_IB2_BASE),
173 .length = SZ_64M,
174 .type = MT_DEVICE
175 },
176 #endif
177 #ifdef CONFIG_DEBUG_LL
178 {
179 .virtual = IO_ADDRESS(VERSATILE_UART0_BASE),
180 .pfn = __phys_to_pfn(VERSATILE_UART0_BASE),
181 .length = SZ_4K,
182 .type = MT_DEVICE
183 },
184 #endif
185 #ifdef CONFIG_PCI
186 {
187 .virtual = IO_ADDRESS(VERSATILE_PCI_CORE_BASE),
188 .pfn = __phys_to_pfn(VERSATILE_PCI_CORE_BASE),
189 .length = SZ_4K,
190 .type = MT_DEVICE
191 }, {
192 .virtual = (unsigned long)VERSATILE_PCI_VIRT_BASE,
193 .pfn = __phys_to_pfn(VERSATILE_PCI_BASE),
194 .length = VERSATILE_PCI_BASE_SIZE,
195 .type = MT_DEVICE
196 }, {
197 .virtual = (unsigned long)VERSATILE_PCI_CFG_VIRT_BASE,
198 .pfn = __phys_to_pfn(VERSATILE_PCI_CFG_BASE),
199 .length = VERSATILE_PCI_CFG_BASE_SIZE,
200 .type = MT_DEVICE
201 },
202 #if 0
203 {
204 .virtual = VERSATILE_PCI_VIRT_MEM_BASE0,
205 .pfn = __phys_to_pfn(VERSATILE_PCI_MEM_BASE0),
206 .length = SZ_16M,
207 .type = MT_DEVICE
208 }, {
209 .virtual = VERSATILE_PCI_VIRT_MEM_BASE1,
210 .pfn = __phys_to_pfn(VERSATILE_PCI_MEM_BASE1),
211 .length = SZ_16M,
212 .type = MT_DEVICE
213 }, {
214 .virtual = VERSATILE_PCI_VIRT_MEM_BASE2,
215 .pfn = __phys_to_pfn(VERSATILE_PCI_MEM_BASE2),
216 .length = SZ_16M,
217 .type = MT_DEVICE
218 },
219 #endif
220 #endif
221 };
222
223 void __init versatile_map_io(void)
224 {
225 iotable_init(versatile_io_desc, ARRAY_SIZE(versatile_io_desc));
226 }
227
228 #define VERSATILE_REFCOUNTER (__io_address(VERSATILE_SYS_BASE) + VERSATILE_SYS_24MHz_OFFSET)
229
230 /*
231 * This is the Versatile sched_clock implementation. This has
232 * a resolution of 41.7ns, and a maximum value of about 35583 days.
233 *
234 * The return value is guaranteed to be monotonic in that range as
235 * long as there is always less than 89 seconds between successive
236 * calls to this function.
237 */
238 unsigned long long sched_clock(void)
239 {
240 unsigned long long v = cnt32_to_63(readl(VERSATILE_REFCOUNTER));
241
242 /* the <<1 gets rid of the cnt_32_to_63 top bit saving on a bic insn */
243 v *= 125<<1;
244 do_div(v, 3<<1);
245
246 return v;
247 }
248
249
250 #define VERSATILE_FLASHCTRL (__io_address(VERSATILE_SYS_BASE) + VERSATILE_SYS_FLASH_OFFSET)
251
252 static int versatile_flash_init(void)
253 {
254 u32 val;
255
256 val = __raw_readl(VERSATILE_FLASHCTRL);
257 val &= ~VERSATILE_FLASHPROG_FLVPPEN;
258 __raw_writel(val, VERSATILE_FLASHCTRL);
259
260 return 0;
261 }
262
263 static void versatile_flash_exit(void)
264 {
265 u32 val;
266
267 val = __raw_readl(VERSATILE_FLASHCTRL);
268 val &= ~VERSATILE_FLASHPROG_FLVPPEN;
269 __raw_writel(val, VERSATILE_FLASHCTRL);
270 }
271
272 static void versatile_flash_set_vpp(int on)
273 {
274 u32 val;
275
276 val = __raw_readl(VERSATILE_FLASHCTRL);
277 if (on)
278 val |= VERSATILE_FLASHPROG_FLVPPEN;
279 else
280 val &= ~VERSATILE_FLASHPROG_FLVPPEN;
281 __raw_writel(val, VERSATILE_FLASHCTRL);
282 }
283
284 static struct flash_platform_data versatile_flash_data = {
285 .map_name = "cfi_probe",
286 .width = 4,
287 .init = versatile_flash_init,
288 .exit = versatile_flash_exit,
289 .set_vpp = versatile_flash_set_vpp,
290 };
291
292 static struct resource versatile_flash_resource = {
293 .start = VERSATILE_FLASH_BASE,
294 .end = VERSATILE_FLASH_BASE + VERSATILE_FLASH_SIZE - 1,
295 .flags = IORESOURCE_MEM,
296 };
297
298 static struct platform_device versatile_flash_device = {
299 .name = "armflash",
300 .id = 0,
301 .dev = {
302 .platform_data = &versatile_flash_data,
303 },
304 .num_resources = 1,
305 .resource = &versatile_flash_resource,
306 };
307
308 static struct resource smc91x_resources[] = {
309 [0] = {
310 .start = VERSATILE_ETH_BASE,
311 .end = VERSATILE_ETH_BASE + SZ_64K - 1,
312 .flags = IORESOURCE_MEM,
313 },
314 [1] = {
315 .start = IRQ_ETH,
316 .end = IRQ_ETH,
317 .flags = IORESOURCE_IRQ,
318 },
319 };
320
321 static struct platform_device smc91x_device = {
322 .name = "smc91x",
323 .id = 0,
324 .num_resources = ARRAY_SIZE(smc91x_resources),
325 .resource = smc91x_resources,
326 };
327
328 #define VERSATILE_SYSMCI (__io_address(VERSATILE_SYS_BASE) + VERSATILE_SYS_MCI_OFFSET)
329
330 unsigned int mmc_status(struct device *dev)
331 {
332 struct amba_device *adev = container_of(dev, struct amba_device, dev);
333 u32 mask;
334
335 if (adev->res.start == VERSATILE_MMCI0_BASE)
336 mask = 1;
337 else
338 mask = 2;
339
340 return readl(VERSATILE_SYSMCI) & mask;
341 }
342
343 static struct mmc_platform_data mmc0_plat_data = {
344 .ocr_mask = MMC_VDD_32_33|MMC_VDD_33_34,
345 .status = mmc_status,
346 };
347
348 /*
349 * Clock handling
350 */
351 static const struct icst307_params versatile_oscvco_params = {
352 .ref = 24000,
353 .vco_max = 200000,
354 .vd_min = 4 + 8,
355 .vd_max = 511 + 8,
356 .rd_min = 1 + 2,
357 .rd_max = 127 + 2,
358 };
359
360 static void versatile_oscvco_set(struct clk *clk, struct icst307_vco vco)
361 {
362 void __iomem *sys_lock = __io_address(VERSATILE_SYS_BASE) + VERSATILE_SYS_LOCK_OFFSET;
363 void __iomem *sys_osc = __io_address(VERSATILE_SYS_BASE) + VERSATILE_SYS_OSCCLCD_OFFSET;
364 u32 val;
365
366 val = readl(sys_osc) & ~0x7ffff;
367 val |= vco.v | (vco.r << 9) | (vco.s << 16);
368
369 writel(0xa05f, sys_lock);
370 writel(val, sys_osc);
371 writel(0, sys_lock);
372 }
373
374 static struct clk versatile_clcd_clk = {
375 .name = "CLCDCLK",
376 .params = &versatile_oscvco_params,
377 .setvco = versatile_oscvco_set,
378 };
379
380 /*
381 * CLCD support.
382 */
383 #define SYS_CLCD_MODE_MASK (3 << 0)
384 #define SYS_CLCD_MODE_888 (0 << 0)
385 #define SYS_CLCD_MODE_5551 (1 << 0)
386 #define SYS_CLCD_MODE_565_RLSB (2 << 0)
387 #define SYS_CLCD_MODE_565_BLSB (3 << 0)
388 #define SYS_CLCD_NLCDIOON (1 << 2)
389 #define SYS_CLCD_VDDPOSSWITCH (1 << 3)
390 #define SYS_CLCD_PWR3V5SWITCH (1 << 4)
391 #define SYS_CLCD_ID_MASK (0x1f << 8)
392 #define SYS_CLCD_ID_SANYO_3_8 (0x00 << 8)
393 #define SYS_CLCD_ID_UNKNOWN_8_4 (0x01 << 8)
394 #define SYS_CLCD_ID_EPSON_2_2 (0x02 << 8)
395 #define SYS_CLCD_ID_SANYO_2_5 (0x07 << 8)
396 #define SYS_CLCD_ID_VGA (0x1f << 8)
397
398 static struct clcd_panel vga = {
399 .mode = {
400 .name = "VGA",
401 .refresh = 60,
402 .xres = 640,
403 .yres = 480,
404 .pixclock = 39721,
405 .left_margin = 40,
406 .right_margin = 24,
407 .upper_margin = 32,
408 .lower_margin = 11,
409 .hsync_len = 96,
410 .vsync_len = 2,
411 .sync = 0,
412 .vmode = FB_VMODE_NONINTERLACED,
413 },
414 .width = -1,
415 .height = -1,
416 .tim2 = TIM2_BCD | TIM2_IPC,
417 .cntl = CNTL_LCDTFT | CNTL_LCDVCOMP(1),
418 .bpp = 16,
419 };
420
421 static struct clcd_panel sanyo_3_8_in = {
422 .mode = {
423 .name = "Sanyo QVGA",
424 .refresh = 116,
425 .xres = 320,
426 .yres = 240,
427 .pixclock = 100000,
428 .left_margin = 6,
429 .right_margin = 6,
430 .upper_margin = 5,
431 .lower_margin = 5,
432 .hsync_len = 6,
433 .vsync_len = 6,
434 .sync = 0,
435 .vmode = FB_VMODE_NONINTERLACED,
436 },
437 .width = -1,
438 .height = -1,
439 .tim2 = TIM2_BCD,
440 .cntl = CNTL_LCDTFT | CNTL_LCDVCOMP(1),
441 .bpp = 16,
442 };
443
444 static struct clcd_panel sanyo_2_5_in = {
445 .mode = {
446 .name = "Sanyo QVGA Portrait",
447 .refresh = 116,
448 .xres = 240,
449 .yres = 320,
450 .pixclock = 100000,
451 .left_margin = 20,
452 .right_margin = 10,
453 .upper_margin = 2,
454 .lower_margin = 2,
455 .hsync_len = 10,
456 .vsync_len = 2,
457 .sync = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
458 .vmode = FB_VMODE_NONINTERLACED,
459 },
460 .width = -1,
461 .height = -1,
462 .tim2 = TIM2_IVS | TIM2_IHS | TIM2_IPC,
463 .cntl = CNTL_LCDTFT | CNTL_LCDVCOMP(1),
464 .bpp = 16,
465 };
466
467 static struct clcd_panel epson_2_2_in = {
468 .mode = {
469 .name = "Epson QCIF",
470 .refresh = 390,
471 .xres = 176,
472 .yres = 220,
473 .pixclock = 62500,
474 .left_margin = 3,
475 .right_margin = 2,
476 .upper_margin = 1,
477 .lower_margin = 0,
478 .hsync_len = 3,
479 .vsync_len = 2,
480 .sync = 0,
481 .vmode = FB_VMODE_NONINTERLACED,
482 },
483 .width = -1,
484 .height = -1,
485 .tim2 = TIM2_BCD | TIM2_IPC,
486 .cntl = CNTL_LCDTFT | CNTL_LCDVCOMP(1),
487 .bpp = 16,
488 };
489
490 /*
491 * Detect which LCD panel is connected, and return the appropriate
492 * clcd_panel structure. Note: we do not have any information on
493 * the required timings for the 8.4in panel, so we presently assume
494 * VGA timings.
495 */
496 static struct clcd_panel *versatile_clcd_panel(void)
497 {
498 void __iomem *sys_clcd = __io_address(VERSATILE_SYS_BASE) + VERSATILE_SYS_CLCD_OFFSET;
499 struct clcd_panel *panel = &vga;
500 u32 val;
501
502 val = readl(sys_clcd) & SYS_CLCD_ID_MASK;
503 if (val == SYS_CLCD_ID_SANYO_3_8)
504 panel = &sanyo_3_8_in;
505 else if (val == SYS_CLCD_ID_SANYO_2_5)
506 panel = &sanyo_2_5_in;
507 else if (val == SYS_CLCD_ID_EPSON_2_2)
508 panel = &epson_2_2_in;
509 else if (val == SYS_CLCD_ID_VGA)
510 panel = &vga;
511 else {
512 printk(KERN_ERR "CLCD: unknown LCD panel ID 0x%08x, using VGA\n",
513 val);
514 panel = &vga;
515 }
516
517 return panel;
518 }
519
520 /*
521 * Disable all display connectors on the interface module.
522 */
523 static void versatile_clcd_disable(struct clcd_fb *fb)
524 {
525 void __iomem *sys_clcd = __io_address(VERSATILE_SYS_BASE) + VERSATILE_SYS_CLCD_OFFSET;
526 u32 val;
527
528 val = readl(sys_clcd);
529 val &= ~SYS_CLCD_NLCDIOON | SYS_CLCD_PWR3V5SWITCH;
530 writel(val, sys_clcd);
531
532 #ifdef CONFIG_MACH_VERSATILE_AB
533 /*
534 * If the LCD is Sanyo 2x5 in on the IB2 board, turn the back-light off
535 */
536 if (machine_is_versatile_ab() && fb->panel == &sanyo_2_5_in) {
537 void __iomem *versatile_ib2_ctrl = __io_address(VERSATILE_IB2_CTRL);
538 unsigned long ctrl;
539
540 ctrl = readl(versatile_ib2_ctrl);
541 ctrl &= ~0x01;
542 writel(ctrl, versatile_ib2_ctrl);
543 }
544 #endif
545 }
546
547 /*
548 * Enable the relevant connector on the interface module.
549 */
550 static void versatile_clcd_enable(struct clcd_fb *fb)
551 {
552 void __iomem *sys_clcd = __io_address(VERSATILE_SYS_BASE) + VERSATILE_SYS_CLCD_OFFSET;
553 u32 val;
554
555 val = readl(sys_clcd);
556 val &= ~SYS_CLCD_MODE_MASK;
557
558 switch (fb->fb.var.green.length) {
559 case 5:
560 val |= SYS_CLCD_MODE_5551;
561 break;
562 case 6:
563 val |= SYS_CLCD_MODE_565_RLSB;
564 break;
565 case 8:
566 val |= SYS_CLCD_MODE_888;
567 break;
568 }
569
570 /*
571 * Set the MUX
572 */
573 writel(val, sys_clcd);
574
575 /*
576 * And now enable the PSUs
577 */
578 val |= SYS_CLCD_NLCDIOON | SYS_CLCD_PWR3V5SWITCH;
579 writel(val, sys_clcd);
580
581 #ifdef CONFIG_MACH_VERSATILE_AB
582 /*
583 * If the LCD is Sanyo 2x5 in on the IB2 board, turn the back-light on
584 */
585 if (machine_is_versatile_ab() && fb->panel == &sanyo_2_5_in) {
586 void __iomem *versatile_ib2_ctrl = __io_address(VERSATILE_IB2_CTRL);
587 unsigned long ctrl;
588
589 ctrl = readl(versatile_ib2_ctrl);
590 ctrl |= 0x01;
591 writel(ctrl, versatile_ib2_ctrl);
592 }
593 #endif
594 }
595
596 static unsigned long framesize = SZ_1M;
597
598 static int versatile_clcd_setup(struct clcd_fb *fb)
599 {
600 dma_addr_t dma;
601
602 fb->panel = versatile_clcd_panel();
603
604 fb->fb.screen_base = dma_alloc_writecombine(&fb->dev->dev, framesize,
605 &dma, GFP_KERNEL);
606 if (!fb->fb.screen_base) {
607 printk(KERN_ERR "CLCD: unable to map framebuffer\n");
608 return -ENOMEM;
609 }
610
611 fb->fb.fix.smem_start = dma;
612 fb->fb.fix.smem_len = framesize;
613
614 return 0;
615 }
616
617 static int versatile_clcd_mmap(struct clcd_fb *fb, struct vm_area_struct *vma)
618 {
619 return dma_mmap_writecombine(&fb->dev->dev, vma,
620 fb->fb.screen_base,
621 fb->fb.fix.smem_start,
622 fb->fb.fix.smem_len);
623 }
624
625 static void versatile_clcd_remove(struct clcd_fb *fb)
626 {
627 dma_free_writecombine(&fb->dev->dev, fb->fb.fix.smem_len,
628 fb->fb.screen_base, fb->fb.fix.smem_start);
629 }
630
631 static struct clcd_board clcd_plat_data = {
632 .name = "Versatile",
633 .check = clcdfb_check,
634 .decode = clcdfb_decode,
635 .disable = versatile_clcd_disable,
636 .enable = versatile_clcd_enable,
637 .setup = versatile_clcd_setup,
638 .mmap = versatile_clcd_mmap,
639 .remove = versatile_clcd_remove,
640 };
641
642 #define AACI_IRQ { IRQ_AACI, NO_IRQ }
643 #define AACI_DMA { 0x80, 0x81 }
644 #define MMCI0_IRQ { IRQ_MMCI0A,IRQ_SIC_MMCI0B }
645 #define MMCI0_DMA { 0x84, 0 }
646 #define KMI0_IRQ { IRQ_SIC_KMI0, NO_IRQ }
647 #define KMI0_DMA { 0, 0 }
648 #define KMI1_IRQ { IRQ_SIC_KMI1, NO_IRQ }
649 #define KMI1_DMA { 0, 0 }
650
651 /*
652 * These devices are connected directly to the multi-layer AHB switch
653 */
654 #define SMC_IRQ { NO_IRQ, NO_IRQ }
655 #define SMC_DMA { 0, 0 }
656 #define MPMC_IRQ { NO_IRQ, NO_IRQ }
657 #define MPMC_DMA { 0, 0 }
658 #define CLCD_IRQ { IRQ_CLCDINT, NO_IRQ }
659 #define CLCD_DMA { 0, 0 }
660 #define DMAC_IRQ { IRQ_DMAINT, NO_IRQ }
661 #define DMAC_DMA { 0, 0 }
662
663 /*
664 * These devices are connected via the core APB bridge
665 */
666 #define SCTL_IRQ { NO_IRQ, NO_IRQ }
667 #define SCTL_DMA { 0, 0 }
668 #define WATCHDOG_IRQ { IRQ_WDOGINT, NO_IRQ }
669 #define WATCHDOG_DMA { 0, 0 }
670 #define GPIO0_IRQ { IRQ_GPIOINT0, NO_IRQ }
671 #define GPIO0_DMA { 0, 0 }
672 #define GPIO1_IRQ { IRQ_GPIOINT1, NO_IRQ }
673 #define GPIO1_DMA { 0, 0 }
674 #define RTC_IRQ { IRQ_RTCINT, NO_IRQ }
675 #define RTC_DMA { 0, 0 }
676
677 /*
678 * These devices are connected via the DMA APB bridge
679 */
680 #define SCI_IRQ { IRQ_SCIINT, NO_IRQ }
681 #define SCI_DMA { 7, 6 }
682 #define UART0_IRQ { IRQ_UARTINT0, NO_IRQ }
683 #define UART0_DMA { 15, 14 }
684 #define UART1_IRQ { IRQ_UARTINT1, NO_IRQ }
685 #define UART1_DMA { 13, 12 }
686 #define UART2_IRQ { IRQ_UARTINT2, NO_IRQ }
687 #define UART2_DMA { 11, 10 }
688 #define SSP_IRQ { IRQ_SSPINT, NO_IRQ }
689 #define SSP_DMA { 9, 8 }
690
691 /* FPGA Primecells */
692 AMBA_DEVICE(aaci, "fpga:04", AACI, NULL);
693 AMBA_DEVICE(mmc0, "fpga:05", MMCI0, &mmc0_plat_data);
694 AMBA_DEVICE(kmi0, "fpga:06", KMI0, NULL);
695 AMBA_DEVICE(kmi1, "fpga:07", KMI1, NULL);
696
697 /* DevChip Primecells */
698 AMBA_DEVICE(smc, "dev:00", SMC, NULL);
699 AMBA_DEVICE(mpmc, "dev:10", MPMC, NULL);
700 AMBA_DEVICE(clcd, "dev:20", CLCD, &clcd_plat_data);
701 AMBA_DEVICE(dmac, "dev:30", DMAC, NULL);
702 AMBA_DEVICE(sctl, "dev:e0", SCTL, NULL);
703 AMBA_DEVICE(wdog, "dev:e1", WATCHDOG, NULL);
704 AMBA_DEVICE(gpio0, "dev:e4", GPIO0, NULL);
705 AMBA_DEVICE(gpio1, "dev:e5", GPIO1, NULL);
706 AMBA_DEVICE(rtc, "dev:e8", RTC, NULL);
707 AMBA_DEVICE(sci0, "dev:f0", SCI, NULL);
708 AMBA_DEVICE(uart0, "dev:f1", UART0, NULL);
709 AMBA_DEVICE(uart1, "dev:f2", UART1, NULL);
710 AMBA_DEVICE(uart2, "dev:f3", UART2, NULL);
711 AMBA_DEVICE(ssp0, "dev:f4", SSP, NULL);
712
713 static struct amba_device *amba_devs[] __initdata = {
714 &dmac_device,
715 &uart0_device,
716 &uart1_device,
717 &uart2_device,
718 &smc_device,
719 &mpmc_device,
720 &clcd_device,
721 &sctl_device,
722 &wdog_device,
723 &gpio0_device,
724 &gpio1_device,
725 &rtc_device,
726 &sci0_device,
727 &ssp0_device,
728 &aaci_device,
729 &mmc0_device,
730 &kmi0_device,
731 &kmi1_device,
732 };
733
734 #ifdef CONFIG_LEDS
735 #define VA_LEDS_BASE (__io_address(VERSATILE_SYS_BASE) + VERSATILE_SYS_LED_OFFSET)
736
737 static void versatile_leds_event(led_event_t ledevt)
738 {
739 unsigned long flags;
740 u32 val;
741
742 local_irq_save(flags);
743 val = readl(VA_LEDS_BASE);
744
745 switch (ledevt) {
746 case led_idle_start:
747 val = val & ~VERSATILE_SYS_LED0;
748 break;
749
750 case led_idle_end:
751 val = val | VERSATILE_SYS_LED0;
752 break;
753
754 case led_timer:
755 val = val ^ VERSATILE_SYS_LED1;
756 break;
757
758 case led_halted:
759 val = 0;
760 break;
761
762 default:
763 break;
764 }
765
766 writel(val, VA_LEDS_BASE);
767 local_irq_restore(flags);
768 }
769 #endif /* CONFIG_LEDS */
770
771 void __init versatile_init(void)
772 {
773 int i;
774
775 clk_register(&versatile_clcd_clk);
776
777 platform_device_register(&versatile_flash_device);
778 platform_device_register(&smc91x_device);
779
780 for (i = 0; i < ARRAY_SIZE(amba_devs); i++) {
781 struct amba_device *d = amba_devs[i];
782 amba_device_register(d, &iomem_resource);
783 }
784
785 #ifdef CONFIG_LEDS
786 leds_event = versatile_leds_event;
787 #endif
788 }
789
790 /*
791 * Where is the timer (VA)?
792 */
793 #define TIMER0_VA_BASE __io_address(VERSATILE_TIMER0_1_BASE)
794 #define TIMER1_VA_BASE (__io_address(VERSATILE_TIMER0_1_BASE) + 0x20)
795 #define TIMER2_VA_BASE __io_address(VERSATILE_TIMER2_3_BASE)
796 #define TIMER3_VA_BASE (__io_address(VERSATILE_TIMER2_3_BASE) + 0x20)
797 #define VA_IC_BASE __io_address(VERSATILE_VIC_BASE)
798
799 /*
800 * How long is the timer interval?
801 */
802 #define TIMER_INTERVAL (TICKS_PER_uSEC * mSEC_10)
803 #if TIMER_INTERVAL >= 0x100000
804 #define TIMER_RELOAD (TIMER_INTERVAL >> 8)
805 #define TIMER_DIVISOR (TIMER_CTRL_DIV256)
806 #define TICKS2USECS(x) (256 * (x) / TICKS_PER_uSEC)
807 #elif TIMER_INTERVAL >= 0x10000
808 #define TIMER_RELOAD (TIMER_INTERVAL >> 4) /* Divide by 16 */
809 #define TIMER_DIVISOR (TIMER_CTRL_DIV16)
810 #define TICKS2USECS(x) (16 * (x) / TICKS_PER_uSEC)
811 #else
812 #define TIMER_RELOAD (TIMER_INTERVAL)
813 #define TIMER_DIVISOR (TIMER_CTRL_DIV1)
814 #define TICKS2USECS(x) ((x) / TICKS_PER_uSEC)
815 #endif
816
817 /*
818 * Returns number of ms since last clock interrupt. Note that interrupts
819 * will have been disabled by do_gettimeoffset()
820 */
821 static unsigned long versatile_gettimeoffset(void)
822 {
823 unsigned long ticks1, ticks2, status;
824
825 /*
826 * Get the current number of ticks. Note that there is a race
827 * condition between us reading the timer and checking for
828 * an interrupt. We get around this by ensuring that the
829 * counter has not reloaded between our two reads.
830 */
831 ticks2 = readl(TIMER0_VA_BASE + TIMER_VALUE) & 0xffff;
832 do {
833 ticks1 = ticks2;
834 status = __raw_readl(VA_IC_BASE + VIC_RAW_STATUS);
835 ticks2 = readl(TIMER0_VA_BASE + TIMER_VALUE) & 0xffff;
836 } while (ticks2 > ticks1);
837
838 /*
839 * Number of ticks since last interrupt.
840 */
841 ticks1 = TIMER_RELOAD - ticks2;
842
843 /*
844 * Interrupt pending? If so, we've reloaded once already.
845 *
846 * FIXME: Need to check this is effectively timer 0 that expires
847 */
848 if (status & IRQMASK_TIMERINT0_1)
849 ticks1 += TIMER_RELOAD;
850
851 /*
852 * Convert the ticks to usecs
853 */
854 return TICKS2USECS(ticks1);
855 }
856
857 /*
858 * IRQ handler for the timer
859 */
860 static irqreturn_t versatile_timer_interrupt(int irq, void *dev_id)
861 {
862 write_seqlock(&xtime_lock);
863
864 // ...clear the interrupt
865 writel(1, TIMER0_VA_BASE + TIMER_INTCLR);
866
867 timer_tick();
868
869 write_sequnlock(&xtime_lock);
870
871 return IRQ_HANDLED;
872 }
873
874 static struct irqaction versatile_timer_irq = {
875 .name = "Versatile Timer Tick",
876 .flags = IRQF_DISABLED | IRQF_TIMER,
877 .handler = versatile_timer_interrupt,
878 };
879
880 /*
881 * Set up timer interrupt, and return the current time in seconds.
882 */
883 static void __init versatile_timer_init(void)
884 {
885 u32 val;
886
887 /*
888 * set clock frequency:
889 * VERSATILE_REFCLK is 32KHz
890 * VERSATILE_TIMCLK is 1MHz
891 */
892 val = readl(__io_address(VERSATILE_SCTL_BASE));
893 writel((VERSATILE_TIMCLK << VERSATILE_TIMER1_EnSel) |
894 (VERSATILE_TIMCLK << VERSATILE_TIMER2_EnSel) |
895 (VERSATILE_TIMCLK << VERSATILE_TIMER3_EnSel) |
896 (VERSATILE_TIMCLK << VERSATILE_TIMER4_EnSel) | val,
897 __io_address(VERSATILE_SCTL_BASE));
898
899 /*
900 * Initialise to a known state (all timers off)
901 */
902 writel(0, TIMER0_VA_BASE + TIMER_CTRL);
903 writel(0, TIMER1_VA_BASE + TIMER_CTRL);
904 writel(0, TIMER2_VA_BASE + TIMER_CTRL);
905 writel(0, TIMER3_VA_BASE + TIMER_CTRL);
906
907 writel(TIMER_RELOAD, TIMER0_VA_BASE + TIMER_LOAD);
908 writel(TIMER_RELOAD, TIMER0_VA_BASE + TIMER_VALUE);
909 writel(TIMER_DIVISOR | TIMER_CTRL_ENABLE | TIMER_CTRL_PERIODIC |
910 TIMER_CTRL_IE, TIMER0_VA_BASE + TIMER_CTRL);
911
912 /*
913 * Make irqs happen for the system timer
914 */
915 setup_irq(IRQ_TIMERINT0_1, &versatile_timer_irq);
916 }
917
918 struct sys_timer versatile_timer = {
919 .init = versatile_timer_init,
920 .offset = versatile_gettimeoffset,
921 };
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