Merge branch 'next/soc-exynos5250-arch' of git://git.kernel.org/pub/scm/linux/kernel...
[linux-2.6.git] / arch / arm / mach-sa1100 / generic.c
1 /*
2  * linux/arch/arm/mach-sa1100/generic.c
3  *
4  * Author: Nicolas Pitre
5  *
6  * Code common to all SA11x0 machines.
7  *
8  * This program is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License version 2 as
10  * published by the Free Software Foundation.
11  */
12 #include <linux/gpio.h>
13 #include <linux/module.h>
14 #include <linux/kernel.h>
15 #include <linux/init.h>
16 #include <linux/delay.h>
17 #include <linux/pm.h>
18 #include <linux/cpufreq.h>
19 #include <linux/ioport.h>
20 #include <linux/platform_device.h>
21
22 #include <asm/div64.h>
23 #include <mach/hardware.h>
24 #include <asm/system.h>
25 #include <asm/mach/map.h>
26 #include <asm/mach/flash.h>
27 #include <asm/irq.h>
28
29 #include "generic.h"
30
31 unsigned int reset_status;
32 EXPORT_SYMBOL(reset_status);
33
34 #define NR_FREQS        16
35
36 /*
37  * This table is setup for a 3.6864MHz Crystal.
38  */
39 static const unsigned short cclk_frequency_100khz[NR_FREQS] = {
40          590,   /*  59.0 MHz */
41          737,   /*  73.7 MHz */
42          885,   /*  88.5 MHz */
43         1032,   /* 103.2 MHz */
44         1180,   /* 118.0 MHz */
45         1327,   /* 132.7 MHz */
46         1475,   /* 147.5 MHz */
47         1622,   /* 162.2 MHz */
48         1769,   /* 176.9 MHz */
49         1917,   /* 191.7 MHz */
50         2064,   /* 206.4 MHz */
51         2212,   /* 221.2 MHz */
52         2359,   /* 235.9 MHz */
53         2507,   /* 250.7 MHz */
54         2654,   /* 265.4 MHz */
55         2802    /* 280.2 MHz */
56 };
57
58 /* rounds up(!)  */
59 unsigned int sa11x0_freq_to_ppcr(unsigned int khz)
60 {
61         int i;
62
63         khz /= 100;
64
65         for (i = 0; i < NR_FREQS; i++)
66                 if (cclk_frequency_100khz[i] >= khz)
67                         break;
68
69         return i;
70 }
71
72 unsigned int sa11x0_ppcr_to_freq(unsigned int idx)
73 {
74         unsigned int freq = 0;
75         if (idx < NR_FREQS)
76                 freq = cclk_frequency_100khz[idx] * 100;
77         return freq;
78 }
79
80
81 /* make sure that only the "userspace" governor is run -- anything else wouldn't make sense on
82  * this platform, anyway.
83  */
84 int sa11x0_verify_speed(struct cpufreq_policy *policy)
85 {
86         unsigned int tmp;
87         if (policy->cpu)
88                 return -EINVAL;
89
90         cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq, policy->cpuinfo.max_freq);
91
92         /* make sure that at least one frequency is within the policy */
93         tmp = cclk_frequency_100khz[sa11x0_freq_to_ppcr(policy->min)] * 100;
94         if (tmp > policy->max)
95                 policy->max = tmp;
96
97         cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq, policy->cpuinfo.max_freq);
98
99         return 0;
100 }
101
102 unsigned int sa11x0_getspeed(unsigned int cpu)
103 {
104         if (cpu)
105                 return 0;
106         return cclk_frequency_100khz[PPCR & 0xf] * 100;
107 }
108
109 /*
110  * Default power-off for SA1100
111  */
112 static void sa1100_power_off(void)
113 {
114         mdelay(100);
115         local_irq_disable();
116         /* disable internal oscillator, float CS lines */
117         PCFR = (PCFR_OPDE | PCFR_FP | PCFR_FS);
118         /* enable wake-up on GPIO0 (Assabet...) */
119         PWER = GFER = GRER = 1;
120         /*
121          * set scratchpad to zero, just in case it is used as a
122          * restart address by the bootloader.
123          */
124         PSPR = 0;
125         /* enter sleep mode */
126         PMCR = PMCR_SF;
127 }
128
129 void sa11x0_restart(char mode, const char *cmd)
130 {
131         if (mode == 's') {
132                 /* Jump into ROM at address 0 */
133                 soft_restart(0);
134         } else {
135                 /* Use on-chip reset capability */
136                 RSRR = RSRR_SWR;
137         }
138 }
139
140 static void sa11x0_register_device(struct platform_device *dev, void *data)
141 {
142         int err;
143         dev->dev.platform_data = data;
144         err = platform_device_register(dev);
145         if (err)
146                 printk(KERN_ERR "Unable to register device %s: %d\n",
147                         dev->name, err);
148 }
149
150
151 static struct resource sa11x0udc_resources[] = {
152         [0] = {
153                 .start  = __PREG(Ser0UDCCR),
154                 .end    = __PREG(Ser0UDCCR) + 0xffff,
155                 .flags  = IORESOURCE_MEM,
156         },
157         [1] = {
158                 .start  = IRQ_Ser0UDC,
159                 .end    = IRQ_Ser0UDC,
160                 .flags  = IORESOURCE_IRQ,
161         },
162 };
163
164 static u64 sa11x0udc_dma_mask = 0xffffffffUL;
165
166 static struct platform_device sa11x0udc_device = {
167         .name           = "sa11x0-udc",
168         .id             = -1,
169         .dev            = {
170                 .dma_mask = &sa11x0udc_dma_mask,
171                 .coherent_dma_mask = 0xffffffff,
172         },
173         .num_resources  = ARRAY_SIZE(sa11x0udc_resources),
174         .resource       = sa11x0udc_resources,
175 };
176
177 static struct resource sa11x0uart1_resources[] = {
178         [0] = {
179                 .start  = __PREG(Ser1UTCR0),
180                 .end    = __PREG(Ser1UTCR0) + 0xffff,
181                 .flags  = IORESOURCE_MEM,
182         },
183         [1] = {
184                 .start  = IRQ_Ser1UART,
185                 .end    = IRQ_Ser1UART,
186                 .flags  = IORESOURCE_IRQ,
187         },
188 };
189
190 static struct platform_device sa11x0uart1_device = {
191         .name           = "sa11x0-uart",
192         .id             = 1,
193         .num_resources  = ARRAY_SIZE(sa11x0uart1_resources),
194         .resource       = sa11x0uart1_resources,
195 };
196
197 static struct resource sa11x0uart3_resources[] = {
198         [0] = {
199                 .start  = __PREG(Ser3UTCR0),
200                 .end    = __PREG(Ser3UTCR0) + 0xffff,
201                 .flags  = IORESOURCE_MEM,
202         },
203         [1] = {
204                 .start  = IRQ_Ser3UART,
205                 .end    = IRQ_Ser3UART,
206                 .flags  = IORESOURCE_IRQ,
207         },
208 };
209
210 static struct platform_device sa11x0uart3_device = {
211         .name           = "sa11x0-uart",
212         .id             = 3,
213         .num_resources  = ARRAY_SIZE(sa11x0uart3_resources),
214         .resource       = sa11x0uart3_resources,
215 };
216
217 static struct resource sa11x0mcp_resources[] = {
218         [0] = {
219                 .start  = __PREG(Ser4MCCR0),
220                 .end    = __PREG(Ser4MCCR0) + 0xffff,
221                 .flags  = IORESOURCE_MEM,
222         },
223         [1] = {
224                 .start  = IRQ_Ser4MCP,
225                 .end    = IRQ_Ser4MCP,
226                 .flags  = IORESOURCE_IRQ,
227         },
228 };
229
230 static u64 sa11x0mcp_dma_mask = 0xffffffffUL;
231
232 static struct platform_device sa11x0mcp_device = {
233         .name           = "sa11x0-mcp",
234         .id             = -1,
235         .dev = {
236                 .dma_mask = &sa11x0mcp_dma_mask,
237                 .coherent_dma_mask = 0xffffffff,
238         },
239         .num_resources  = ARRAY_SIZE(sa11x0mcp_resources),
240         .resource       = sa11x0mcp_resources,
241 };
242
243 void sa11x0_register_mcp(struct mcp_plat_data *data)
244 {
245         sa11x0_register_device(&sa11x0mcp_device, data);
246 }
247
248 static struct resource sa11x0ssp_resources[] = {
249         [0] = {
250                 .start  = 0x80070000,
251                 .end    = 0x8007ffff,
252                 .flags  = IORESOURCE_MEM,
253         },
254         [1] = {
255                 .start  = IRQ_Ser4SSP,
256                 .end    = IRQ_Ser4SSP,
257                 .flags  = IORESOURCE_IRQ,
258         },
259 };
260
261 static u64 sa11x0ssp_dma_mask = 0xffffffffUL;
262
263 static struct platform_device sa11x0ssp_device = {
264         .name           = "sa11x0-ssp",
265         .id             = -1,
266         .dev = {
267                 .dma_mask = &sa11x0ssp_dma_mask,
268                 .coherent_dma_mask = 0xffffffff,
269         },
270         .num_resources  = ARRAY_SIZE(sa11x0ssp_resources),
271         .resource       = sa11x0ssp_resources,
272 };
273
274 static struct resource sa11x0fb_resources[] = {
275         [0] = {
276                 .start  = 0xb0100000,
277                 .end    = 0xb010ffff,
278                 .flags  = IORESOURCE_MEM,
279         },
280         [1] = {
281                 .start  = IRQ_LCD,
282                 .end    = IRQ_LCD,
283                 .flags  = IORESOURCE_IRQ,
284         },
285 };
286
287 static struct platform_device sa11x0fb_device = {
288         .name           = "sa11x0-fb",
289         .id             = -1,
290         .dev = {
291                 .coherent_dma_mask = 0xffffffff,
292         },
293         .num_resources  = ARRAY_SIZE(sa11x0fb_resources),
294         .resource       = sa11x0fb_resources,
295 };
296
297 static struct platform_device sa11x0pcmcia_device = {
298         .name           = "sa11x0-pcmcia",
299         .id             = -1,
300 };
301
302 static struct platform_device sa11x0mtd_device = {
303         .name           = "sa1100-mtd",
304         .id             = -1,
305 };
306
307 void sa11x0_register_mtd(struct flash_platform_data *flash,
308                          struct resource *res, int nr)
309 {
310         flash->name = "sa1100";
311         sa11x0mtd_device.resource = res;
312         sa11x0mtd_device.num_resources = nr;
313         sa11x0_register_device(&sa11x0mtd_device, flash);
314 }
315
316 static struct resource sa11x0ir_resources[] = {
317         {
318                 .start  = __PREG(Ser2UTCR0),
319                 .end    = __PREG(Ser2UTCR0) + 0x24 - 1,
320                 .flags  = IORESOURCE_MEM,
321         }, {
322                 .start  = __PREG(Ser2HSCR0),
323                 .end    = __PREG(Ser2HSCR0) + 0x1c - 1,
324                 .flags  = IORESOURCE_MEM,
325         }, {
326                 .start  = __PREG(Ser2HSCR2),
327                 .end    = __PREG(Ser2HSCR2) + 0x04 - 1,
328                 .flags  = IORESOURCE_MEM,
329         }, {
330                 .start  = IRQ_Ser2ICP,
331                 .end    = IRQ_Ser2ICP,
332                 .flags  = IORESOURCE_IRQ,
333         }
334 };
335
336 static struct platform_device sa11x0ir_device = {
337         .name           = "sa11x0-ir",
338         .id             = -1,
339         .num_resources  = ARRAY_SIZE(sa11x0ir_resources),
340         .resource       = sa11x0ir_resources,
341 };
342
343 void sa11x0_register_irda(struct irda_platform_data *irda)
344 {
345         sa11x0_register_device(&sa11x0ir_device, irda);
346 }
347
348 static struct platform_device sa11x0rtc_device = {
349         .name           = "sa1100-rtc",
350         .id             = -1,
351 };
352
353 static struct platform_device *sa11x0_devices[] __initdata = {
354         &sa11x0udc_device,
355         &sa11x0uart1_device,
356         &sa11x0uart3_device,
357         &sa11x0ssp_device,
358         &sa11x0pcmcia_device,
359         &sa11x0fb_device,
360         &sa11x0rtc_device,
361 };
362
363 static int __init sa1100_init(void)
364 {
365         pm_power_off = sa1100_power_off;
366         return platform_add_devices(sa11x0_devices, ARRAY_SIZE(sa11x0_devices));
367 }
368
369 arch_initcall(sa1100_init);
370
371 void (*sa1100fb_backlight_power)(int on);
372 void (*sa1100fb_lcd_power)(int on);
373
374 EXPORT_SYMBOL(sa1100fb_backlight_power);
375 EXPORT_SYMBOL(sa1100fb_lcd_power);
376
377
378 /*
379  * Common I/O mapping:
380  *
381  * Typically, static virtual address mappings are as follow:
382  *
383  * 0xf0000000-0xf3ffffff:       miscellaneous stuff (CPLDs, etc.)
384  * 0xf4000000-0xf4ffffff:       SA-1111
385  * 0xf5000000-0xf5ffffff:       reserved (used by cache flushing area)
386  * 0xf6000000-0xfffeffff:       reserved (internal SA1100 IO defined above)
387  * 0xffff0000-0xffff0fff:       SA1100 exception vectors
388  * 0xffff2000-0xffff2fff:       Minicache copy_user_page area
389  *
390  * Below 0xe8000000 is reserved for vm allocation.
391  *
392  * The machine specific code must provide the extra mapping beside the
393  * default mapping provided here.
394  */
395
396 static struct map_desc standard_io_desc[] __initdata = {
397         {       /* PCM */
398                 .virtual        =  0xf8000000,
399                 .pfn            = __phys_to_pfn(0x80000000),
400                 .length         = 0x00100000,
401                 .type           = MT_DEVICE
402         }, {    /* SCM */
403                 .virtual        =  0xfa000000,
404                 .pfn            = __phys_to_pfn(0x90000000),
405                 .length         = 0x00100000,
406                 .type           = MT_DEVICE
407         }, {    /* MER */
408                 .virtual        =  0xfc000000,
409                 .pfn            = __phys_to_pfn(0xa0000000),
410                 .length         = 0x00100000,
411                 .type           = MT_DEVICE
412         }, {    /* LCD + DMA */
413                 .virtual        =  0xfe000000,
414                 .pfn            = __phys_to_pfn(0xb0000000),
415                 .length         = 0x00200000,
416                 .type           = MT_DEVICE
417         },
418 };
419
420 void __init sa1100_map_io(void)
421 {
422         iotable_init(standard_io_desc, ARRAY_SIZE(standard_io_desc));
423 }
424
425 /*
426  * Disable the memory bus request/grant signals on the SA1110 to
427  * ensure that we don't receive spurious memory requests.  We set
428  * the MBGNT signal false to ensure the SA1111 doesn't own the
429  * SDRAM bus.
430  */
431 void __init sa1110_mb_disable(void)
432 {
433         unsigned long flags;
434
435         local_irq_save(flags);
436         
437         PGSR &= ~GPIO_MBGNT;
438         GPCR = GPIO_MBGNT;
439         GPDR = (GPDR & ~GPIO_MBREQ) | GPIO_MBGNT;
440
441         GAFR &= ~(GPIO_MBGNT | GPIO_MBREQ);
442
443         local_irq_restore(flags);
444 }
445
446 /*
447  * If the system is going to use the SA-1111 DMA engines, set up
448  * the memory bus request/grant pins.
449  */
450 void __devinit sa1110_mb_enable(void)
451 {
452         unsigned long flags;
453
454         local_irq_save(flags);
455
456         PGSR &= ~GPIO_MBGNT;
457         GPCR = GPIO_MBGNT;
458         GPDR = (GPDR & ~GPIO_MBREQ) | GPIO_MBGNT;
459
460         GAFR |= (GPIO_MBGNT | GPIO_MBREQ);
461         TUCR |= TUCR_MR;
462
463         local_irq_restore(flags);
464 }
465