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x86: don't call '->send_IPI_mask()' with an empty mask
[linux-2.6/mini2440.git] / arch / arm / mach-versatile / core.c
blob31093af7d05211ba940d80d6700291257db1bb6c
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 #include <linux/clocksource.h>
30 #include <linux/clockchips.h>
31 #include <linux/cnt32_to_63.h>
32 #include <linux/io.h>
33
34 #include <asm/clkdev.h>
35 #include <asm/system.h>
36 #include <mach/hardware.h>
37 #include <asm/irq.h>
38 #include <asm/leds.h>
39 #include <asm/hardware/arm_timer.h>
40 #include <asm/hardware/icst307.h>
41 #include <asm/hardware/vic.h>
42 #include <asm/mach-types.h>
43
44 #include <asm/mach/arch.h>
45 #include <asm/mach/flash.h>
46 #include <asm/mach/irq.h>
47 #include <asm/mach/time.h>
48 #include <asm/mach/map.h>
49 #include <asm/mach/mmc.h>
50
51 #include "core.h"
52 #include "clock.h"
53
54 /*
55 * All IO addresses are mapped onto VA 0xFFFx.xxxx, where x.xxxx
56 * is the (PA >> 12).
57 *
58 * Setup a VA for the Versatile Vectored Interrupt Controller.
59 */
60 #define __io_address(n) __io(IO_ADDRESS(n))
61 #define VA_VIC_BASE __io_address(VERSATILE_VIC_BASE)
62 #define VA_SIC_BASE __io_address(VERSATILE_SIC_BASE)
63
64 static void sic_mask_irq(unsigned int irq)
65 {
66 irq -= IRQ_SIC_START;
67 writel(1 << irq, VA_SIC_BASE + SIC_IRQ_ENABLE_CLEAR);
68 }
69
70 static void sic_unmask_irq(unsigned int irq)
71 {
72 irq -= IRQ_SIC_START;
73 writel(1 << irq, VA_SIC_BASE + SIC_IRQ_ENABLE_SET);
74 }
75
76 static struct irq_chip sic_chip = {
77 .name = "SIC",
78 .ack = sic_mask_irq,
79 .mask = sic_mask_irq,
80 .unmask = sic_unmask_irq,
81 };
82
83 static void
84 sic_handle_irq(unsigned int irq, struct irq_desc *desc)
85 {
86 unsigned long status = readl(VA_SIC_BASE + SIC_IRQ_STATUS);
87
88 if (status == 0) {
89 do_bad_IRQ(irq, desc);
90 return;
91 }
92
93 do {
94 irq = ffs(status) - 1;
95 status &= ~(1 << irq);
96
97 irq += IRQ_SIC_START;
98
99 generic_handle_irq(irq);
100 } while (status);
101 }
102
103 #if 1
104 #define IRQ_MMCI0A IRQ_VICSOURCE22
105 #define IRQ_AACI IRQ_VICSOURCE24
106 #define IRQ_ETH IRQ_VICSOURCE25
107 #define PIC_MASK 0xFFD00000
108 #else
109 #define IRQ_MMCI0A IRQ_SIC_MMCI0A
110 #define IRQ_AACI IRQ_SIC_AACI
111 #define IRQ_ETH IRQ_SIC_ETH
112 #define PIC_MASK 0
113 #endif
114
115 void __init versatile_init_irq(void)
116 {
117 unsigned int i;
118
119 vic_init(VA_VIC_BASE, IRQ_VIC_START, ~0, 0);
120
121 set_irq_chained_handler(IRQ_VICSOURCE31, sic_handle_irq);
122
123 /* Do second interrupt controller */
124 writel(~0, VA_SIC_BASE + SIC_IRQ_ENABLE_CLEAR);
125
126 for (i = IRQ_SIC_START; i <= IRQ_SIC_END; i++) {
127 if ((PIC_MASK & (1 << (i - IRQ_SIC_START))) == 0) {
128 set_irq_chip(i, &sic_chip);
129 set_irq_handler(i, handle_level_irq);
130 set_irq_flags(i, IRQF_VALID | IRQF_PROBE);
131 }
132 }
133
134 /*
135 * Interrupts on secondary controller from 0 to 8 are routed to
136 * source 31 on PIC.
137 * Interrupts from 21 to 31 are routed directly to the VIC on
138 * the corresponding number on primary controller. This is controlled
139 * by setting PIC_ENABLEx.
140 */
141 writel(PIC_MASK, VA_SIC_BASE + SIC_INT_PIC_ENABLE);
142 }
143
144 static struct map_desc versatile_io_desc[] __initdata = {
145 {
146 .virtual = IO_ADDRESS(VERSATILE_SYS_BASE),
147 .pfn = __phys_to_pfn(VERSATILE_SYS_BASE),
148 .length = SZ_4K,
149 .type = MT_DEVICE
150 }, {
151 .virtual = IO_ADDRESS(VERSATILE_SIC_BASE),
152 .pfn = __phys_to_pfn(VERSATILE_SIC_BASE),
153 .length = SZ_4K,
154 .type = MT_DEVICE
155 }, {
156 .virtual = IO_ADDRESS(VERSATILE_VIC_BASE),
157 .pfn = __phys_to_pfn(VERSATILE_VIC_BASE),
158 .length = SZ_4K,
159 .type = MT_DEVICE
160 }, {
161 .virtual = IO_ADDRESS(VERSATILE_SCTL_BASE),
162 .pfn = __phys_to_pfn(VERSATILE_SCTL_BASE),
163 .length = SZ_4K * 9,
164 .type = MT_DEVICE
165 },
166 #ifdef CONFIG_MACH_VERSATILE_AB
167 {
168 .virtual = IO_ADDRESS(VERSATILE_GPIO0_BASE),
169 .pfn = __phys_to_pfn(VERSATILE_GPIO0_BASE),
170 .length = SZ_4K,
171 .type = MT_DEVICE
172 }, {
173 .virtual = IO_ADDRESS(VERSATILE_IB2_BASE),
174 .pfn = __phys_to_pfn(VERSATILE_IB2_BASE),
175 .length = SZ_64M,
176 .type = MT_DEVICE
177 },
178 #endif
179 #ifdef CONFIG_DEBUG_LL
180 {
181 .virtual = IO_ADDRESS(VERSATILE_UART0_BASE),
182 .pfn = __phys_to_pfn(VERSATILE_UART0_BASE),
183 .length = SZ_4K,
184 .type = MT_DEVICE
185 },
186 #endif
187 #ifdef CONFIG_PCI
188 {
189 .virtual = IO_ADDRESS(VERSATILE_PCI_CORE_BASE),
190 .pfn = __phys_to_pfn(VERSATILE_PCI_CORE_BASE),
191 .length = SZ_4K,
192 .type = MT_DEVICE
193 }, {
194 .virtual = (unsigned long)VERSATILE_PCI_VIRT_BASE,
195 .pfn = __phys_to_pfn(VERSATILE_PCI_BASE),
196 .length = VERSATILE_PCI_BASE_SIZE,
197 .type = MT_DEVICE
198 }, {
199 .virtual = (unsigned long)VERSATILE_PCI_CFG_VIRT_BASE,
200 .pfn = __phys_to_pfn(VERSATILE_PCI_CFG_BASE),
201 .length = VERSATILE_PCI_CFG_BASE_SIZE,
202 .type = MT_DEVICE
203 },
204 #if 0
205 {
206 .virtual = VERSATILE_PCI_VIRT_MEM_BASE0,
207 .pfn = __phys_to_pfn(VERSATILE_PCI_MEM_BASE0),
208 .length = SZ_16M,
209 .type = MT_DEVICE
210 }, {
211 .virtual = VERSATILE_PCI_VIRT_MEM_BASE1,
212 .pfn = __phys_to_pfn(VERSATILE_PCI_MEM_BASE1),
213 .length = SZ_16M,
214 .type = MT_DEVICE
215 }, {
216 .virtual = VERSATILE_PCI_VIRT_MEM_BASE2,
217 .pfn = __phys_to_pfn(VERSATILE_PCI_MEM_BASE2),
218 .length = SZ_16M,
219 .type = MT_DEVICE
220 },
221 #endif
222 #endif
223 };
224
225 void __init versatile_map_io(void)
226 {
227 iotable_init(versatile_io_desc, ARRAY_SIZE(versatile_io_desc));
228 }
229
230 #define VERSATILE_REFCOUNTER (__io_address(VERSATILE_SYS_BASE) + VERSATILE_SYS_24MHz_OFFSET)
231
232 /*
233 * This is the Versatile sched_clock implementation. This has
234 * a resolution of 41.7ns, and a maximum value of about 35583 days.
235 *
236 * The return value is guaranteed to be monotonic in that range as
237 * long as there is always less than 89 seconds between successive
238 * calls to this function.
239 */
240 unsigned long long sched_clock(void)
241 {
242 unsigned long long v = cnt32_to_63(readl(VERSATILE_REFCOUNTER));
243
244 /* the <<1 gets rid of the cnt_32_to_63 top bit saving on a bic insn */
245 v *= 125<<1;
246 do_div(v, 3<<1);
247
248 return v;
249 }
250
251
252 #define VERSATILE_FLASHCTRL (__io_address(VERSATILE_SYS_BASE) + VERSATILE_SYS_FLASH_OFFSET)
253
254 static int versatile_flash_init(void)
255 {
256 u32 val;
257
258 val = __raw_readl(VERSATILE_FLASHCTRL);
259 val &= ~VERSATILE_FLASHPROG_FLVPPEN;
260 __raw_writel(val, VERSATILE_FLASHCTRL);
261
262 return 0;
263 }
264
265 static void versatile_flash_exit(void)
266 {
267 u32 val;
268
269 val = __raw_readl(VERSATILE_FLASHCTRL);
270 val &= ~VERSATILE_FLASHPROG_FLVPPEN;
271 __raw_writel(val, VERSATILE_FLASHCTRL);
272 }
273
274 static void versatile_flash_set_vpp(int on)
275 {
276 u32 val;
277
278 val = __raw_readl(VERSATILE_FLASHCTRL);
279 if (on)
280 val |= VERSATILE_FLASHPROG_FLVPPEN;
281 else
282 val &= ~VERSATILE_FLASHPROG_FLVPPEN;
283 __raw_writel(val, VERSATILE_FLASHCTRL);
284 }
285
286 static struct flash_platform_data versatile_flash_data = {
287 .map_name = "cfi_probe",
288 .width = 4,
289 .init = versatile_flash_init,
290 .exit = versatile_flash_exit,
291 .set_vpp = versatile_flash_set_vpp,
292 };
293
294 static struct resource versatile_flash_resource = {
295 .start = VERSATILE_FLASH_BASE,
296 .end = VERSATILE_FLASH_BASE + VERSATILE_FLASH_SIZE - 1,
297 .flags = IORESOURCE_MEM,
298 };
299
300 static struct platform_device versatile_flash_device = {
301 .name = "armflash",
302 .id = 0,
303 .dev = {
304 .platform_data = &versatile_flash_data,
305 },
306 .num_resources = 1,
307 .resource = &versatile_flash_resource,
308 };
309
310 static struct resource smc91x_resources[] = {
311 [0] = {
312 .start = VERSATILE_ETH_BASE,
313 .end = VERSATILE_ETH_BASE + SZ_64K - 1,
314 .flags = IORESOURCE_MEM,
315 },
316 [1] = {
317 .start = IRQ_ETH,
318 .end = IRQ_ETH,
319 .flags = IORESOURCE_IRQ,
320 },
321 };
322
323 static struct platform_device smc91x_device = {
324 .name = "smc91x",
325 .id = 0,
326 .num_resources = ARRAY_SIZE(smc91x_resources),
327 .resource = smc91x_resources,
328 };
329
330 static struct resource versatile_i2c_resource = {
331 .start = VERSATILE_I2C_BASE,
332 .end = VERSATILE_I2C_BASE + SZ_4K - 1,
333 .flags = IORESOURCE_MEM,
334 };
335
336 static struct platform_device versatile_i2c_device = {
337 .name = "versatile-i2c",
338 .id = 0,
339 .num_resources = 1,
340 .resource = &versatile_i2c_resource,
341 };
342
343 static struct i2c_board_info versatile_i2c_board_info[] = {
344 {
345 I2C_BOARD_INFO("ds1338", 0xd0 >> 1),
346 },
347 };
348
349 static int __init versatile_i2c_init(void)
350 {
351 return i2c_register_board_info(0, versatile_i2c_board_info,
352 ARRAY_SIZE(versatile_i2c_board_info));
353 }
354 arch_initcall(versatile_i2c_init);
355
356 #define VERSATILE_SYSMCI (__io_address(VERSATILE_SYS_BASE) + VERSATILE_SYS_MCI_OFFSET)
357
358 unsigned int mmc_status(struct device *dev)
359 {
360 struct amba_device *adev = container_of(dev, struct amba_device, dev);
361 u32 mask;
362
363 if (adev->res.start == VERSATILE_MMCI0_BASE)
364 mask = 1;
365 else
366 mask = 2;
367
368 return readl(VERSATILE_SYSMCI) & mask;
369 }
370
371 static struct mmc_platform_data mmc0_plat_data = {
372 .ocr_mask = MMC_VDD_32_33|MMC_VDD_33_34,
373 .status = mmc_status,
374 };
375
376 /*
377 * Clock handling
378 */
379 static const struct icst307_params versatile_oscvco_params = {
380 .ref = 24000,
381 .vco_max = 200000,
382 .vd_min = 4 + 8,
383 .vd_max = 511 + 8,
384 .rd_min = 1 + 2,
385 .rd_max = 127 + 2,
386 };
387
388 static void versatile_oscvco_set(struct clk *clk, struct icst307_vco vco)
389 {
390 void __iomem *sys = __io_address(VERSATILE_SYS_BASE);
391 void __iomem *sys_lock = sys + VERSATILE_SYS_LOCK_OFFSET;
392 u32 val;
393
394 val = readl(sys + clk->oscoff) & ~0x7ffff;
395 val |= vco.v | (vco.r << 9) | (vco.s << 16);
396
397 writel(0xa05f, sys_lock);
398 writel(val, sys + clk->oscoff);
399 writel(0, sys_lock);
400 }
401
402 static struct clk osc4_clk = {
403 .params = &versatile_oscvco_params,
404 .oscoff = VERSATILE_SYS_OSCCLCD_OFFSET,
405 .setvco = versatile_oscvco_set,
406 };
407
408 /*
409 * These are fixed clocks.
410 */
411 static struct clk ref24_clk = {
412 .rate = 24000000,
413 };
414
415 static struct clk_lookup lookups[] = {
416 { /* UART0 */
417 .dev_id = "dev:f1",
418 .clk = &ref24_clk,
419 }, { /* UART1 */
420 .dev_id = "dev:f2",
421 .clk = &ref24_clk,
422 }, { /* UART2 */
423 .dev_id = "dev:f3",
424 .clk = &ref24_clk,
425 }, { /* UART3 */
426 .dev_id = "fpga:09",
427 .clk = &ref24_clk,
428 }, { /* KMI0 */
429 .dev_id = "fpga:06",
430 .clk = &ref24_clk,
431 }, { /* KMI1 */
432 .dev_id = "fpga:07",
433 .clk = &ref24_clk,
434 }, { /* MMC0 */
435 .dev_id = "fpga:05",
436 .clk = &ref24_clk,
437 }, { /* MMC1 */
438 .dev_id = "fpga:0b",
439 .clk = &ref24_clk,
440 }, { /* CLCD */
441 .dev_id = "dev:20",
442 .clk = &osc4_clk,
443 }
444 };
445
446 /*
447 * CLCD support.
448 */
449 #define SYS_CLCD_MODE_MASK (3 << 0)
450 #define SYS_CLCD_MODE_888 (0 << 0)
451 #define SYS_CLCD_MODE_5551 (1 << 0)
452 #define SYS_CLCD_MODE_565_RLSB (2 << 0)
453 #define SYS_CLCD_MODE_565_BLSB (3 << 0)
454 #define SYS_CLCD_NLCDIOON (1 << 2)
455 #define SYS_CLCD_VDDPOSSWITCH (1 << 3)
456 #define SYS_CLCD_PWR3V5SWITCH (1 << 4)
457 #define SYS_CLCD_ID_MASK (0x1f << 8)
458 #define SYS_CLCD_ID_SANYO_3_8 (0x00 << 8)
459 #define SYS_CLCD_ID_UNKNOWN_8_4 (0x01 << 8)
460 #define SYS_CLCD_ID_EPSON_2_2 (0x02 << 8)
461 #define SYS_CLCD_ID_SANYO_2_5 (0x07 << 8)
462 #define SYS_CLCD_ID_VGA (0x1f << 8)
463
464 static struct clcd_panel vga = {
465 .mode = {
466 .name = "VGA",
467 .refresh = 60,
468 .xres = 640,
469 .yres = 480,
470 .pixclock = 39721,
471 .left_margin = 40,
472 .right_margin = 24,
473 .upper_margin = 32,
474 .lower_margin = 11,
475 .hsync_len = 96,
476 .vsync_len = 2,
477 .sync = 0,
478 .vmode = FB_VMODE_NONINTERLACED,
479 },
480 .width = -1,
481 .height = -1,
482 .tim2 = TIM2_BCD | TIM2_IPC,
483 .cntl = CNTL_LCDTFT | CNTL_LCDVCOMP(1),
484 .bpp = 16,
485 };
486
487 static struct clcd_panel sanyo_3_8_in = {
488 .mode = {
489 .name = "Sanyo QVGA",
490 .refresh = 116,
491 .xres = 320,
492 .yres = 240,
493 .pixclock = 100000,
494 .left_margin = 6,
495 .right_margin = 6,
496 .upper_margin = 5,
497 .lower_margin = 5,
498 .hsync_len = 6,
499 .vsync_len = 6,
500 .sync = 0,
501 .vmode = FB_VMODE_NONINTERLACED,
502 },
503 .width = -1,
504 .height = -1,
505 .tim2 = TIM2_BCD,
506 .cntl = CNTL_LCDTFT | CNTL_LCDVCOMP(1),
507 .bpp = 16,
508 };
509
510 static struct clcd_panel sanyo_2_5_in = {
511 .mode = {
512 .name = "Sanyo QVGA Portrait",
513 .refresh = 116,
514 .xres = 240,
515 .yres = 320,
516 .pixclock = 100000,
517 .left_margin = 20,
518 .right_margin = 10,
519 .upper_margin = 2,
520 .lower_margin = 2,
521 .hsync_len = 10,
522 .vsync_len = 2,
523 .sync = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
524 .vmode = FB_VMODE_NONINTERLACED,
525 },
526 .width = -1,
527 .height = -1,
528 .tim2 = TIM2_IVS | TIM2_IHS | TIM2_IPC,
529 .cntl = CNTL_LCDTFT | CNTL_LCDVCOMP(1),
530 .bpp = 16,
531 };
532
533 static struct clcd_panel epson_2_2_in = {
534 .mode = {
535 .name = "Epson QCIF",
536 .refresh = 390,
537 .xres = 176,
538 .yres = 220,
539 .pixclock = 62500,
540 .left_margin = 3,
541 .right_margin = 2,
542 .upper_margin = 1,
543 .lower_margin = 0,
544 .hsync_len = 3,
545 .vsync_len = 2,
546 .sync = 0,
547 .vmode = FB_VMODE_NONINTERLACED,
548 },
549 .width = -1,
550 .height = -1,
551 .tim2 = TIM2_BCD | TIM2_IPC,
552 .cntl = CNTL_LCDTFT | CNTL_LCDVCOMP(1),
553 .bpp = 16,
554 };
555
556 /*
557 * Detect which LCD panel is connected, and return the appropriate
558 * clcd_panel structure. Note: we do not have any information on
559 * the required timings for the 8.4in panel, so we presently assume
560 * VGA timings.
561 */
562 static struct clcd_panel *versatile_clcd_panel(void)
563 {
564 void __iomem *sys_clcd = __io_address(VERSATILE_SYS_BASE) + VERSATILE_SYS_CLCD_OFFSET;
565 struct clcd_panel *panel = &vga;
566 u32 val;
567
568 val = readl(sys_clcd) & SYS_CLCD_ID_MASK;
569 if (val == SYS_CLCD_ID_SANYO_3_8)
570 panel = &sanyo_3_8_in;
571 else if (val == SYS_CLCD_ID_SANYO_2_5)
572 panel = &sanyo_2_5_in;
573 else if (val == SYS_CLCD_ID_EPSON_2_2)
574 panel = &epson_2_2_in;
575 else if (val == SYS_CLCD_ID_VGA)
576 panel = &vga;
577 else {
578 printk(KERN_ERR "CLCD: unknown LCD panel ID 0x%08x, using VGA\n",
579 val);
580 panel = &vga;
581 }
582
583 return panel;
584 }
585
586 /*
587 * Disable all display connectors on the interface module.
588 */
589 static void versatile_clcd_disable(struct clcd_fb *fb)
590 {
591 void __iomem *sys_clcd = __io_address(VERSATILE_SYS_BASE) + VERSATILE_SYS_CLCD_OFFSET;
592 u32 val;
593
594 val = readl(sys_clcd);
595 val &= ~SYS_CLCD_NLCDIOON | SYS_CLCD_PWR3V5SWITCH;
596 writel(val, sys_clcd);
597
598 #ifdef CONFIG_MACH_VERSATILE_AB
599 /*
600 * If the LCD is Sanyo 2x5 in on the IB2 board, turn the back-light off
601 */
602 if (machine_is_versatile_ab() && fb->panel == &sanyo_2_5_in) {
603 void __iomem *versatile_ib2_ctrl = __io_address(VERSATILE_IB2_CTRL);
604 unsigned long ctrl;
605
606 ctrl = readl(versatile_ib2_ctrl);
607 ctrl &= ~0x01;
608 writel(ctrl, versatile_ib2_ctrl);
609 }
610 #endif
611 }
612
613 /*
614 * Enable the relevant connector on the interface module.
615 */
616 static void versatile_clcd_enable(struct clcd_fb *fb)
617 {
618 void __iomem *sys_clcd = __io_address(VERSATILE_SYS_BASE) + VERSATILE_SYS_CLCD_OFFSET;
619 u32 val;
620
621 val = readl(sys_clcd);
622 val &= ~SYS_CLCD_MODE_MASK;
623
624 switch (fb->fb.var.green.length) {
625 case 5:
626 val |= SYS_CLCD_MODE_5551;
627 break;
628 case 6:
629 val |= SYS_CLCD_MODE_565_RLSB;
630 break;
631 case 8:
632 val |= SYS_CLCD_MODE_888;
633 break;
634 }
635
636 /*
637 * Set the MUX
638 */
639 writel(val, sys_clcd);
640
641 /*
642 * And now enable the PSUs
643 */
644 val |= SYS_CLCD_NLCDIOON | SYS_CLCD_PWR3V5SWITCH;
645 writel(val, sys_clcd);
646
647 #ifdef CONFIG_MACH_VERSATILE_AB
648 /*
649 * If the LCD is Sanyo 2x5 in on the IB2 board, turn the back-light on
650 */
651 if (machine_is_versatile_ab() && fb->panel == &sanyo_2_5_in) {
652 void __iomem *versatile_ib2_ctrl = __io_address(VERSATILE_IB2_CTRL);
653 unsigned long ctrl;
654
655 ctrl = readl(versatile_ib2_ctrl);
656 ctrl |= 0x01;
657 writel(ctrl, versatile_ib2_ctrl);
658 }
659 #endif
660 }
661
662 static unsigned long framesize = SZ_1M;
663
664 static int versatile_clcd_setup(struct clcd_fb *fb)
665 {
666 dma_addr_t dma;
667
668 fb->panel = versatile_clcd_panel();
669
670 fb->fb.screen_base = dma_alloc_writecombine(&fb->dev->dev, framesize,
671 &dma, GFP_KERNEL);
672 if (!fb->fb.screen_base) {
673 printk(KERN_ERR "CLCD: unable to map framebuffer\n");
674 return -ENOMEM;
675 }
676
677 fb->fb.fix.smem_start = dma;
678 fb->fb.fix.smem_len = framesize;
679
680 return 0;
681 }
682
683 static int versatile_clcd_mmap(struct clcd_fb *fb, struct vm_area_struct *vma)
684 {
685 return dma_mmap_writecombine(&fb->dev->dev, vma,
686 fb->fb.screen_base,
687 fb->fb.fix.smem_start,
688 fb->fb.fix.smem_len);
689 }
690
691 static void versatile_clcd_remove(struct clcd_fb *fb)
692 {
693 dma_free_writecombine(&fb->dev->dev, fb->fb.fix.smem_len,
694 fb->fb.screen_base, fb->fb.fix.smem_start);
695 }
696
697 static struct clcd_board clcd_plat_data = {
698 .name = "Versatile",
699 .check = clcdfb_check,
700 .decode = clcdfb_decode,
701 .disable = versatile_clcd_disable,
702 .enable = versatile_clcd_enable,
703 .setup = versatile_clcd_setup,
704 .mmap = versatile_clcd_mmap,
705 .remove = versatile_clcd_remove,
706 };
707
708 #define AACI_IRQ { IRQ_AACI, NO_IRQ }
709 #define AACI_DMA { 0x80, 0x81 }
710 #define MMCI0_IRQ { IRQ_MMCI0A,IRQ_SIC_MMCI0B }
711 #define MMCI0_DMA { 0x84, 0 }
712 #define KMI0_IRQ { IRQ_SIC_KMI0, NO_IRQ }
713 #define KMI0_DMA { 0, 0 }
714 #define KMI1_IRQ { IRQ_SIC_KMI1, NO_IRQ }
715 #define KMI1_DMA { 0, 0 }
716
717 /*
718 * These devices are connected directly to the multi-layer AHB switch
719 */
720 #define SMC_IRQ { NO_IRQ, NO_IRQ }
721 #define SMC_DMA { 0, 0 }
722 #define MPMC_IRQ { NO_IRQ, NO_IRQ }
723 #define MPMC_DMA { 0, 0 }
724 #define CLCD_IRQ { IRQ_CLCDINT, NO_IRQ }
725 #define CLCD_DMA { 0, 0 }
726 #define DMAC_IRQ { IRQ_DMAINT, NO_IRQ }
727 #define DMAC_DMA { 0, 0 }
728
729 /*
730 * These devices are connected via the core APB bridge
731 */
732 #define SCTL_IRQ { NO_IRQ, NO_IRQ }
733 #define SCTL_DMA { 0, 0 }
734 #define WATCHDOG_IRQ { IRQ_WDOGINT, NO_IRQ }
735 #define WATCHDOG_DMA { 0, 0 }
736 #define GPIO0_IRQ { IRQ_GPIOINT0, NO_IRQ }
737 #define GPIO0_DMA { 0, 0 }
738 #define GPIO1_IRQ { IRQ_GPIOINT1, NO_IRQ }
739 #define GPIO1_DMA { 0, 0 }
740 #define RTC_IRQ { IRQ_RTCINT, NO_IRQ }
741 #define RTC_DMA { 0, 0 }
742
743 /*
744 * These devices are connected via the DMA APB bridge
745 */
746 #define SCI_IRQ { IRQ_SCIINT, NO_IRQ }
747 #define SCI_DMA { 7, 6 }
748 #define UART0_IRQ { IRQ_UARTINT0, NO_IRQ }
749 #define UART0_DMA { 15, 14 }
750 #define UART1_IRQ { IRQ_UARTINT1, NO_IRQ }
751 #define UART1_DMA { 13, 12 }
752 #define UART2_IRQ { IRQ_UARTINT2, NO_IRQ }
753 #define UART2_DMA { 11, 10 }
754 #define SSP_IRQ { IRQ_SSPINT, NO_IRQ }
755 #define SSP_DMA { 9, 8 }
756
757 /* FPGA Primecells */
758 AMBA_DEVICE(aaci, "fpga:04", AACI, NULL);
759 AMBA_DEVICE(mmc0, "fpga:05", MMCI0, &mmc0_plat_data);
760 AMBA_DEVICE(kmi0, "fpga:06", KMI0, NULL);
761 AMBA_DEVICE(kmi1, "fpga:07", KMI1, NULL);
762
763 /* DevChip Primecells */
764 AMBA_DEVICE(smc, "dev:00", SMC, NULL);
765 AMBA_DEVICE(mpmc, "dev:10", MPMC, NULL);
766 AMBA_DEVICE(clcd, "dev:20", CLCD, &clcd_plat_data);
767 AMBA_DEVICE(dmac, "dev:30", DMAC, NULL);
768 AMBA_DEVICE(sctl, "dev:e0", SCTL, NULL);
769 AMBA_DEVICE(wdog, "dev:e1", WATCHDOG, NULL);
770 AMBA_DEVICE(gpio0, "dev:e4", GPIO0, NULL);
771 AMBA_DEVICE(gpio1, "dev:e5", GPIO1, NULL);
772 AMBA_DEVICE(rtc, "dev:e8", RTC, NULL);
773 AMBA_DEVICE(sci0, "dev:f0", SCI, NULL);
774 AMBA_DEVICE(uart0, "dev:f1", UART0, NULL);
775 AMBA_DEVICE(uart1, "dev:f2", UART1, NULL);
776 AMBA_DEVICE(uart2, "dev:f3", UART2, NULL);
777 AMBA_DEVICE(ssp0, "dev:f4", SSP, NULL);
778
779 static struct amba_device *amba_devs[] __initdata = {
780 &dmac_device,
781 &uart0_device,
782 &uart1_device,
783 &uart2_device,
784 &smc_device,
785 &mpmc_device,
786 &clcd_device,
787 &sctl_device,
788 &wdog_device,
789 &gpio0_device,
790 &gpio1_device,
791 &rtc_device,
792 &sci0_device,
793 &ssp0_device,
794 &aaci_device,
795 &mmc0_device,
796 &kmi0_device,
797 &kmi1_device,
798 };
799
800 #ifdef CONFIG_LEDS
801 #define VA_LEDS_BASE (__io_address(VERSATILE_SYS_BASE) + VERSATILE_SYS_LED_OFFSET)
802
803 static void versatile_leds_event(led_event_t ledevt)
804 {
805 unsigned long flags;
806 u32 val;
807
808 local_irq_save(flags);
809 val = readl(VA_LEDS_BASE);
810
811 switch (ledevt) {
812 case led_idle_start:
813 val = val & ~VERSATILE_SYS_LED0;
814 break;
815
816 case led_idle_end:
817 val = val | VERSATILE_SYS_LED0;
818 break;
819
820 case led_timer:
821 val = val ^ VERSATILE_SYS_LED1;
822 break;
823
824 case led_halted:
825 val = 0;
826 break;
827
828 default:
829 break;
830 }
831
832 writel(val, VA_LEDS_BASE);
833 local_irq_restore(flags);
834 }
835 #endif /* CONFIG_LEDS */
836
837 void __init versatile_init(void)
838 {
839 int i;
840
841 for (i = 0; i < ARRAY_SIZE(lookups); i++)
842 clkdev_add(&lookups[i]);
843
844 platform_device_register(&versatile_flash_device);
845 platform_device_register(&versatile_i2c_device);
846 platform_device_register(&smc91x_device);
847
848 for (i = 0; i < ARRAY_SIZE(amba_devs); i++) {
849 struct amba_device *d = amba_devs[i];
850 amba_device_register(d, &iomem_resource);
851 }
852
853 #ifdef CONFIG_LEDS
854 leds_event = versatile_leds_event;
855 #endif
856 }
857
858 /*
859 * Where is the timer (VA)?
860 */
861 #define TIMER0_VA_BASE __io_address(VERSATILE_TIMER0_1_BASE)
862 #define TIMER1_VA_BASE (__io_address(VERSATILE_TIMER0_1_BASE) + 0x20)
863 #define TIMER2_VA_BASE __io_address(VERSATILE_TIMER2_3_BASE)
864 #define TIMER3_VA_BASE (__io_address(VERSATILE_TIMER2_3_BASE) + 0x20)
865 #define VA_IC_BASE __io_address(VERSATILE_VIC_BASE)
866
867 /*
868 * How long is the timer interval?
869 */
870 #define TIMER_INTERVAL (TICKS_PER_uSEC * mSEC_10)
871 #if TIMER_INTERVAL >= 0x100000
872 #define TIMER_RELOAD (TIMER_INTERVAL >> 8)
873 #define TIMER_DIVISOR (TIMER_CTRL_DIV256)
874 #define TICKS2USECS(x) (256 * (x) / TICKS_PER_uSEC)
875 #elif TIMER_INTERVAL >= 0x10000
876 #define TIMER_RELOAD (TIMER_INTERVAL >> 4) /* Divide by 16 */
877 #define TIMER_DIVISOR (TIMER_CTRL_DIV16)
878 #define TICKS2USECS(x) (16 * (x) / TICKS_PER_uSEC)
879 #else
880 #define TIMER_RELOAD (TIMER_INTERVAL)
881 #define TIMER_DIVISOR (TIMER_CTRL_DIV1)
882 #define TICKS2USECS(x) ((x) / TICKS_PER_uSEC)
883 #endif
884
885 static void timer_set_mode(enum clock_event_mode mode,
886 struct clock_event_device *clk)
887 {
888 unsigned long ctrl;
889
890 switch(mode) {
891 case CLOCK_EVT_MODE_PERIODIC:
892 writel(TIMER_RELOAD, TIMER0_VA_BASE + TIMER_LOAD);
893
894 ctrl = TIMER_CTRL_PERIODIC;
895 ctrl |= TIMER_CTRL_32BIT | TIMER_CTRL_IE | TIMER_CTRL_ENABLE;
896 break;
897 case CLOCK_EVT_MODE_ONESHOT:
898 /* period set, and timer enabled in 'next_event' hook */
899 ctrl = TIMER_CTRL_ONESHOT;
900 ctrl |= TIMER_CTRL_32BIT | TIMER_CTRL_IE;
901 break;
902 case CLOCK_EVT_MODE_UNUSED:
903 case CLOCK_EVT_MODE_SHUTDOWN:
904 default:
905 ctrl = 0;
906 }
907
908 writel(ctrl, TIMER0_VA_BASE + TIMER_CTRL);
909 }
910
911 static int timer_set_next_event(unsigned long evt,
912 struct clock_event_device *unused)
913 {
914 unsigned long ctrl = readl(TIMER0_VA_BASE + TIMER_CTRL);
915
916 writel(evt, TIMER0_VA_BASE + TIMER_LOAD);
917 writel(ctrl | TIMER_CTRL_ENABLE, TIMER0_VA_BASE + TIMER_CTRL);
918
919 return 0;
920 }
921
922 static struct clock_event_device timer0_clockevent = {
923 .name = "timer0",
924 .shift = 32,
925 .features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT,
926 .set_mode = timer_set_mode,
927 .set_next_event = timer_set_next_event,
928 };
929
930 /*
931 * IRQ handler for the timer
932 */
933 static irqreturn_t versatile_timer_interrupt(int irq, void *dev_id)
934 {
935 struct clock_event_device *evt = &timer0_clockevent;
936
937 writel(1, TIMER0_VA_BASE + TIMER_INTCLR);
938
939 evt->event_handler(evt);
940
941 return IRQ_HANDLED;
942 }
943
944 static struct irqaction versatile_timer_irq = {
945 .name = "Versatile Timer Tick",
946 .flags = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL,
947 .handler = versatile_timer_interrupt,
948 };
949
950 static cycle_t versatile_get_cycles(struct clocksource *cs)
951 {
952 return ~readl(TIMER3_VA_BASE + TIMER_VALUE);
953 }
954
955 static struct clocksource clocksource_versatile = {
956 .name = "timer3",
957 .rating = 200,
958 .read = versatile_get_cycles,
959 .mask = CLOCKSOURCE_MASK(32),
960 .shift = 20,
961 .flags = CLOCK_SOURCE_IS_CONTINUOUS,
962 };
963
964 static int __init versatile_clocksource_init(void)
965 {
966 /* setup timer3 as free-running clocksource */
967 writel(0, TIMER3_VA_BASE + TIMER_CTRL);
968 writel(0xffffffff, TIMER3_VA_BASE + TIMER_LOAD);
969 writel(0xffffffff, TIMER3_VA_BASE + TIMER_VALUE);
970 writel(TIMER_CTRL_32BIT | TIMER_CTRL_ENABLE | TIMER_CTRL_PERIODIC,
971 TIMER3_VA_BASE + TIMER_CTRL);
972
973 clocksource_versatile.mult =
974 clocksource_khz2mult(1000, clocksource_versatile.shift);
975 clocksource_register(&clocksource_versatile);
976
977 return 0;
978 }
979
980 /*
981 * Set up timer interrupt, and return the current time in seconds.
982 */
983 static void __init versatile_timer_init(void)
984 {
985 u32 val;
986
987 /*
988 * set clock frequency:
989 * VERSATILE_REFCLK is 32KHz
990 * VERSATILE_TIMCLK is 1MHz
991 */
992 val = readl(__io_address(VERSATILE_SCTL_BASE));
993 writel((VERSATILE_TIMCLK << VERSATILE_TIMER1_EnSel) |
994 (VERSATILE_TIMCLK << VERSATILE_TIMER2_EnSel) |
995 (VERSATILE_TIMCLK << VERSATILE_TIMER3_EnSel) |
996 (VERSATILE_TIMCLK << VERSATILE_TIMER4_EnSel) | val,
997 __io_address(VERSATILE_SCTL_BASE));
998
999 /*
1000 * Initialise to a known state (all timers off)
1001 */
1002 writel(0, TIMER0_VA_BASE + TIMER_CTRL);
1003 writel(0, TIMER1_VA_BASE + TIMER_CTRL);
1004 writel(0, TIMER2_VA_BASE + TIMER_CTRL);
1005 writel(0, TIMER3_VA_BASE + TIMER_CTRL);
1006
1007 /*
1008 * Make irqs happen for the system timer
1009 */
1010 setup_irq(IRQ_TIMERINT0_1, &versatile_timer_irq);
1011
1012 versatile_clocksource_init();
1013
1014 timer0_clockevent.mult =
1015 div_sc(1000000, NSEC_PER_SEC, timer0_clockevent.shift);
1016 timer0_clockevent.max_delta_ns =
1017 clockevent_delta2ns(0xffffffff, &timer0_clockevent);
1018 timer0_clockevent.min_delta_ns =
1019 clockevent_delta2ns(0xf, &timer0_clockevent);
1020
1021 timer0_clockevent.cpumask = cpumask_of(0);
1022 clockevents_register_device(&timer0_clockevent);
1023 }
1024
1025 struct sys_timer versatile_timer = {
1026 .init = versatile_timer_init,
1027 };
1028
Support for the Chinese Samsung S3C2440 based development boards