Merge branch 'for-38-rc2' of git://codeaurora.org/quic/kernel/davidb/linux-msm
[pandora-kernel.git] / arch / arm / mach-integrator / integrator_cp.c
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