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[ARM] 4550/1: sched_clock on PXA should cope with run time clock rate selection
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1 /*
2  *  linux/arch/arm/mach-pxa/generic.c
3  *
4  *  Author:     Nicolas Pitre
5  *  Created:    Jun 15, 2001
6  *  Copyright:  MontaVista Software Inc.
7  *
8  * Code common to all PXA machines.
9  *
10  * This program is free software; you can redistribute it and/or modify
11  * it under the terms of the GNU General Public License version 2 as
12  * published by the Free Software Foundation.
13  *
14  * Since this file should be linked before any other machine specific file,
15  * the __initcall() here will be executed first.  This serves as default
16  * initialization stuff for PXA machines which can be overridden later if
17  * need be.
18  */
19 #include <linux/module.h>
20 #include <linux/kernel.h>
21 #include <linux/init.h>
22 #include <linux/delay.h>
23 #include <linux/platform_device.h>
24 #include <linux/ioport.h>
25 #include <linux/pm.h>
26 #include <linux/string.h>
27
28 #include <asm/hardware.h>
29 #include <asm/irq.h>
30 #include <asm/system.h>
31 #include <asm/pgtable.h>
32 #include <asm/mach/map.h>
33
34 #include <asm/arch/pxa-regs.h>
35 #include <asm/arch/gpio.h>
36 #include <asm/arch/udc.h>
37 #include <asm/arch/pxafb.h>
38 #include <asm/arch/mmc.h>
39 #include <asm/arch/irda.h>
40 #include <asm/arch/i2c.h>
41
42 #include "devices.h"
43 #include "generic.h"
44
45 /*
46  * Handy function to set GPIO alternate functions
47  */
48
49 int pxa_gpio_mode(int gpio_mode)
50 {
51         unsigned long flags;
52         int gpio = gpio_mode & GPIO_MD_MASK_NR;
53         int fn = (gpio_mode & GPIO_MD_MASK_FN) >> 8;
54         int gafr;
55
56         if (gpio > PXA_LAST_GPIO)
57                 return -EINVAL;
58
59         local_irq_save(flags);
60         if (gpio_mode & GPIO_DFLT_LOW)
61                 GPCR(gpio) = GPIO_bit(gpio);
62         else if (gpio_mode & GPIO_DFLT_HIGH)
63                 GPSR(gpio) = GPIO_bit(gpio);
64         if (gpio_mode & GPIO_MD_MASK_DIR)
65                 GPDR(gpio) |= GPIO_bit(gpio);
66         else
67                 GPDR(gpio) &= ~GPIO_bit(gpio);
68         gafr = GAFR(gpio) & ~(0x3 << (((gpio) & 0xf)*2));
69         GAFR(gpio) = gafr |  (fn  << (((gpio) & 0xf)*2));
70         local_irq_restore(flags);
71
72         return 0;
73 }
74
75 EXPORT_SYMBOL(pxa_gpio_mode);
76
77 /*
78  * Return GPIO level
79  */
80 int pxa_gpio_get_value(unsigned gpio)
81 {
82         return __gpio_get_value(gpio);
83 }
84
85 EXPORT_SYMBOL(pxa_gpio_get_value);
86
87 /*
88  * Set output GPIO level
89  */
90 void pxa_gpio_set_value(unsigned gpio, int value)
91 {
92         __gpio_set_value(gpio, value);
93 }
94
95 EXPORT_SYMBOL(pxa_gpio_set_value);
96
97 /*
98  * Routine to safely enable or disable a clock in the CKEN
99  */
100 void pxa_set_cken(int clock, int enable)
101 {
102         unsigned long flags;
103         local_irq_save(flags);
104
105         if (enable)
106                 CKEN |= (1 << clock);
107         else
108                 CKEN &= ~(1 << clock);
109
110         local_irq_restore(flags);
111 }
112
113 EXPORT_SYMBOL(pxa_set_cken);
114
115 /*
116  * Intel PXA2xx internal register mapping.
117  *
118  * Note 1: not all PXA2xx variants implement all those addresses.
119  *
120  * Note 2: virtual 0xfffe0000-0xffffffff is reserved for the vector table
121  *         and cache flush area.
122  */
123 static struct map_desc standard_io_desc[] __initdata = {
124         {       /* Devs */
125                 .virtual        =  0xf2000000,
126                 .pfn            = __phys_to_pfn(0x40000000),
127                 .length         = 0x02000000,
128                 .type           = MT_DEVICE
129         }, {    /* LCD */
130                 .virtual        =  0xf4000000,
131                 .pfn            = __phys_to_pfn(0x44000000),
132                 .length         = 0x00100000,
133                 .type           = MT_DEVICE
134         }, {    /* Mem Ctl */
135                 .virtual        =  0xf6000000,
136                 .pfn            = __phys_to_pfn(0x48000000),
137                 .length         = 0x00100000,
138                 .type           = MT_DEVICE
139         }, {    /* USB host */
140                 .virtual        =  0xf8000000,
141                 .pfn            = __phys_to_pfn(0x4c000000),
142                 .length         = 0x00100000,
143                 .type           = MT_DEVICE
144         }, {    /* Camera */
145                 .virtual        =  0xfa000000,
146                 .pfn            = __phys_to_pfn(0x50000000),
147                 .length         = 0x00100000,
148                 .type           = MT_DEVICE
149         }, {    /* IMem ctl */
150                 .virtual        =  0xfe000000,
151                 .pfn            = __phys_to_pfn(0x58000000),
152                 .length         = 0x00100000,
153                 .type           = MT_DEVICE
154         }, {    /* UNCACHED_PHYS_0 */
155                 .virtual        = 0xff000000,
156                 .pfn            = __phys_to_pfn(0x00000000),
157                 .length         = 0x00100000,
158                 .type           = MT_DEVICE
159         }
160 };
161
162 void __init pxa_map_io(void)
163 {
164         iotable_init(standard_io_desc, ARRAY_SIZE(standard_io_desc));
165         get_clk_frequency_khz(1);
166 }
167
168
169 static struct resource pxamci_resources[] = {
170         [0] = {
171                 .start  = 0x41100000,
172                 .end    = 0x41100fff,
173                 .flags  = IORESOURCE_MEM,
174         },
175         [1] = {
176                 .start  = IRQ_MMC,
177                 .end    = IRQ_MMC,
178                 .flags  = IORESOURCE_IRQ,
179         },
180 };
181
182 static u64 pxamci_dmamask = 0xffffffffUL;
183
184 struct platform_device pxa_device_mci = {
185         .name           = "pxa2xx-mci",
186         .id             = -1,
187         .dev            = {
188                 .dma_mask = &pxamci_dmamask,
189                 .coherent_dma_mask = 0xffffffff,
190         },
191         .num_resources  = ARRAY_SIZE(pxamci_resources),
192         .resource       = pxamci_resources,
193 };
194
195 void __init pxa_set_mci_info(struct pxamci_platform_data *info)
196 {
197         pxa_device_mci.dev.platform_data = info;
198 }
199
200
201 static struct pxa2xx_udc_mach_info pxa_udc_info;
202
203 void __init pxa_set_udc_info(struct pxa2xx_udc_mach_info *info)
204 {
205         memcpy(&pxa_udc_info, info, sizeof *info);
206 }
207
208 static struct resource pxa2xx_udc_resources[] = {
209         [0] = {
210                 .start  = 0x40600000,
211                 .end    = 0x4060ffff,
212                 .flags  = IORESOURCE_MEM,
213         },
214         [1] = {
215                 .start  = IRQ_USB,
216                 .end    = IRQ_USB,
217                 .flags  = IORESOURCE_IRQ,
218         },
219 };
220
221 static u64 udc_dma_mask = ~(u32)0;
222
223 struct platform_device pxa_device_udc = {
224         .name           = "pxa2xx-udc",
225         .id             = -1,
226         .resource       = pxa2xx_udc_resources,
227         .num_resources  = ARRAY_SIZE(pxa2xx_udc_resources),
228         .dev            =  {
229                 .platform_data  = &pxa_udc_info,
230                 .dma_mask       = &udc_dma_mask,
231         }
232 };
233
234 static struct resource pxafb_resources[] = {
235         [0] = {
236                 .start  = 0x44000000,
237                 .end    = 0x4400ffff,
238                 .flags  = IORESOURCE_MEM,
239         },
240         [1] = {
241                 .start  = IRQ_LCD,
242                 .end    = IRQ_LCD,
243                 .flags  = IORESOURCE_IRQ,
244         },
245 };
246
247 static u64 fb_dma_mask = ~(u64)0;
248
249 struct platform_device pxa_device_fb = {
250         .name           = "pxa2xx-fb",
251         .id             = -1,
252         .dev            = {
253                 .dma_mask       = &fb_dma_mask,
254                 .coherent_dma_mask = 0xffffffff,
255         },
256         .num_resources  = ARRAY_SIZE(pxafb_resources),
257         .resource       = pxafb_resources,
258 };
259
260 void __init set_pxa_fb_info(struct pxafb_mach_info *info)
261 {
262         pxa_device_fb.dev.platform_data = info;
263 }
264
265 void __init set_pxa_fb_parent(struct device *parent_dev)
266 {
267         pxa_device_fb.dev.parent = parent_dev;
268 }
269
270 struct platform_device pxa_device_ffuart= {
271         .name           = "pxa2xx-uart",
272         .id             = 0,
273 };
274 struct platform_device pxa_device_btuart = {
275         .name           = "pxa2xx-uart",
276         .id             = 1,
277 };
278 struct platform_device pxa_device_stuart = {
279         .name           = "pxa2xx-uart",
280         .id             = 2,
281 };
282 struct platform_device pxa_device_hwuart = {
283         .name           = "pxa2xx-uart",
284         .id             = 3,
285 };
286
287 static struct resource pxai2c_resources[] = {
288         {
289                 .start  = 0x40301680,
290                 .end    = 0x403016a3,
291                 .flags  = IORESOURCE_MEM,
292         }, {
293                 .start  = IRQ_I2C,
294                 .end    = IRQ_I2C,
295                 .flags  = IORESOURCE_IRQ,
296         },
297 };
298
299 struct platform_device pxa_device_i2c = {
300         .name           = "pxa2xx-i2c",
301         .id             = 0,
302         .resource       = pxai2c_resources,
303         .num_resources  = ARRAY_SIZE(pxai2c_resources),
304 };
305
306 void __init pxa_set_i2c_info(struct i2c_pxa_platform_data *info)
307 {
308         pxa_device_i2c.dev.platform_data = info;
309 }
310
311 static struct resource pxai2s_resources[] = {
312         {
313                 .start  = 0x40400000,
314                 .end    = 0x40400083,
315                 .flags  = IORESOURCE_MEM,
316         }, {
317                 .start  = IRQ_I2S,
318                 .end    = IRQ_I2S,
319                 .flags  = IORESOURCE_IRQ,
320         },
321 };
322
323 struct platform_device pxa_device_i2s = {
324         .name           = "pxa2xx-i2s",
325         .id             = -1,
326         .resource       = pxai2s_resources,
327         .num_resources  = ARRAY_SIZE(pxai2s_resources),
328 };
329
330 static u64 pxaficp_dmamask = ~(u32)0;
331
332 struct platform_device pxa_device_ficp = {
333         .name           = "pxa2xx-ir",
334         .id             = -1,
335         .dev            = {
336                 .dma_mask = &pxaficp_dmamask,
337                 .coherent_dma_mask = 0xffffffff,
338         },
339 };
340
341 void __init pxa_set_ficp_info(struct pxaficp_platform_data *info)
342 {
343         pxa_device_ficp.dev.platform_data = info;
344 }
345
346 struct platform_device pxa_device_rtc = {
347         .name           = "sa1100-rtc",
348         .id             = -1,
349 };