1 /*
2 * arch/arm/mach-imx/generic.c
3 *
4 * author: Sascha Hauer
5 * Created: april 20th, 2004
6 * Copyright: Synertronixx GmbH
7 *
8 * Common code for i.MX 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 as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 *
24 */
25 #include <linux/platform_device.h>
26 #include <linux/init.h>
27 #include <linux/kernel.h>
28 #include <linux/module.h>
29 #include <linux/string.h>
30
31 #include <asm/errno.h>
32 #include <asm/arch/imxfb.h>
33 #include <asm/hardware.h>
34 #include <asm/arch/imx-regs.h>
35
36 #include <asm/mach/map.h>
37 #include <asm/arch/mmc.h>
38 #include <asm/arch/gpio.h>
39
40 unsigned long imx_gpio_alloc_map[(GPIO_PORT_MAX + 1) * 32 / BITS_PER_LONG];
41
42 void imx_gpio_mode(int gpio_mode)
43 {
44 unsigned int pin = gpio_mode & GPIO_PIN_MASK;
45 unsigned int port = (gpio_mode & GPIO_PORT_MASK) >> GPIO_PORT_SHIFT;
46 unsigned int ocr = (gpio_mode & GPIO_OCR_MASK) >> GPIO_OCR_SHIFT;
47 unsigned int tmp;
48
49 /* Pullup enable */
50 if(gpio_mode & GPIO_PUEN)
51 PUEN(port) |= (1<<pin);
52 else
53 PUEN(port) &= ~(1<<pin);
54
55 /* Data direction */
56 if(gpio_mode & GPIO_OUT)
57 DDIR(port) |= 1<<pin;
58 else
59 DDIR(port) &= ~(1<<pin);
60
61 /* Primary / alternate function */
62 if(gpio_mode & GPIO_AF)
63 GPR(port) |= (1<<pin);
64 else
65 GPR(port) &= ~(1<<pin);
66
67 /* use as gpio? */
68 if(gpio_mode & GPIO_GIUS)
69 GIUS(port) |= (1<<pin);
70 else
71 GIUS(port) &= ~(1<<pin);
72
73 /* Output / input configuration */
74 /* FIXME: I'm not very sure about OCR and ICONF, someone
75 * should have a look over it
76 */
77 if(pin<16) {
78 tmp = OCR1(port);
79 tmp &= ~( 3<<(pin*2));
80 tmp |= (ocr << (pin*2));
81 OCR1(port) = tmp;
82
83 ICONFA1(port) &= ~( 3<<(pin*2));
84 ICONFA1(port) |= ((gpio_mode >> GPIO_AOUT_SHIFT) & 3) << (pin * 2);
85 ICONFB1(port) &= ~( 3<<(pin*2));
86 ICONFB1(port) |= ((gpio_mode >> GPIO_BOUT_SHIFT) & 3) << (pin * 2);
87 } else {
88 tmp = OCR2(port);
89 tmp &= ~( 3<<((pin-16)*2));
90 tmp |= (ocr << ((pin-16)*2));
91 OCR2(port) = tmp;
92
93 ICONFA2(port) &= ~( 3<<((pin-16)*2));
94 ICONFA2(port) |= ((gpio_mode >> GPIO_AOUT_SHIFT) & 3) << ((pin-16) * 2);
95 ICONFB2(port) &= ~( 3<<((pin-16)*2));
96 ICONFB2(port) |= ((gpio_mode >> GPIO_BOUT_SHIFT) & 3) << ((pin-16) * 2);
97 }
98 }
99
100 EXPORT_SYMBOL(imx_gpio_mode);
101
102 int imx_gpio_request(unsigned gpio, const char *label)
103 {
104 if(gpio >= (GPIO_PORT_MAX + 1) * 32) {
105 printk(KERN_ERR "imx_gpio: Attempt to request nonexistent GPIO %d for \"%s\"\n",
106 gpio, label ? label : "?");
107 return -EINVAL;
108 }
109
110 if(test_and_set_bit(gpio, imx_gpio_alloc_map)) {
111 printk(KERN_ERR "imx_gpio: GPIO %d already used. Allocation for \"%s\" failed\n",
112 gpio, label ? label : "?");
113 return -EBUSY;
114 }
115
116 return 0;
117 }
118
119 EXPORT_SYMBOL(imx_gpio_request);
120
121 void imx_gpio_free(unsigned gpio)
122 {
123 if(gpio >= (GPIO_PORT_MAX + 1) * 32)
124 return;
125
126 clear_bit(gpio, imx_gpio_alloc_map);
127 }
128
129 EXPORT_SYMBOL(imx_gpio_free);
130
131 int imx_gpio_direction_input(unsigned gpio)
132 {
133 imx_gpio_mode(gpio | GPIO_IN | GPIO_GIUS | GPIO_DR);
134 return 0;
135 }
136
137 EXPORT_SYMBOL(imx_gpio_direction_input);
138
139 int imx_gpio_direction_output(unsigned gpio, int value)
140 {
141 imx_gpio_set_value(gpio, value);
142 imx_gpio_mode(gpio | GPIO_OUT | GPIO_GIUS | GPIO_DR);
143 return 0;
144 }
145
146 EXPORT_SYMBOL(imx_gpio_direction_output);
147
148 int imx_gpio_setup_multiple_pins(const int *pin_list, unsigned count,
149 int alloc_mode, const char *label)
150 {
151 const int *p = pin_list;
152 int i;
153 unsigned gpio;
154 unsigned mode;
155
156 for (i = 0; i < count; i++) {
157 gpio = *p & (GPIO_PIN_MASK | GPIO_PORT_MASK);
158 mode = *p & ~(GPIO_PIN_MASK | GPIO_PORT_MASK);
159
160 if (gpio >= (GPIO_PORT_MAX + 1) * 32)
161 goto setup_error;
162
163 if (alloc_mode & IMX_GPIO_ALLOC_MODE_RELEASE)
164 imx_gpio_free(gpio);
165 else if (!(alloc_mode & IMX_GPIO_ALLOC_MODE_NO_ALLOC))
166 if (imx_gpio_request(gpio, label))
167 if (!(alloc_mode & IMX_GPIO_ALLOC_MODE_TRY_ALLOC))
168 goto setup_error;
169
170 if (!(alloc_mode & (IMX_GPIO_ALLOC_MODE_ALLOC_ONLY |
171 IMX_GPIO_ALLOC_MODE_RELEASE)))
172 imx_gpio_mode(gpio | mode);
173
174 p++;
175 }
176 return 0;
177
178 setup_error:
179 if(alloc_mode & (IMX_GPIO_ALLOC_MODE_NO_ALLOC |
180 IMX_GPIO_ALLOC_MODE_TRY_ALLOC))
181 return -EINVAL;
182
183 while (p != pin_list) {
184 p--;
185 gpio = *p & (GPIO_PIN_MASK | GPIO_PORT_MASK);
186 imx_gpio_free(gpio);
187 }
188
189 return -EINVAL;
190 }
191
192 EXPORT_SYMBOL(imx_gpio_setup_multiple_pins);
193
194 void __imx_gpio_set_value(unsigned gpio, int value)
195 {
196 imx_gpio_set_value_inline(gpio, value);
197 }
198
199 EXPORT_SYMBOL(__imx_gpio_set_value);
200
201 int imx_gpio_to_irq(unsigned gpio)
202 {
203 return IRQ_GPIOA(0) + gpio;
204 }
205
206 EXPORT_SYMBOL(imx_gpio_to_irq);
207
208 int imx_irq_to_gpio(unsigned irq)
209 {
210 if (irq < IRQ_GPIOA(0))
211 return -EINVAL;
212 return irq - IRQ_GPIOA(0);
213 }
214
215 EXPORT_SYMBOL(imx_irq_to_gpio);
216
217 /*
218 * get the system pll clock in Hz
219 *
220 * mfi + mfn / (mfd +1)
221 * f = 2 * f_ref * --------------------
222 * pd + 1
223 */
224 static unsigned int imx_decode_pll(unsigned int pll, u32 f_ref)
225 {
226 unsigned long long ll;
227 unsigned long quot;
228
229 u32 mfi = (pll >> 10) & 0xf;
230 u32 mfn = pll & 0x3ff;
231 u32 mfd = (pll >> 16) & 0x3ff;
232 u32 pd = (pll >> 26) & 0xf;
233
234 mfi = mfi <= 5 ? 5 : mfi;
235
236 ll = 2 * (unsigned long long)f_ref * ( (mfi<<16) + (mfn<<16) / (mfd+1) );
237 quot = (pd+1) * (1<<16);
238 ll += quot / 2;
239 do_div(ll, quot);
240 return (unsigned int) ll;
241 }
242
243 unsigned int imx_get_system_clk(void)
244 {
245 u32 f_ref = (CSCR & CSCR_SYSTEM_SEL) ? 16000000 : (CLK32 * 512);
246
247 return imx_decode_pll(SPCTL0, f_ref);
248 }
249 EXPORT_SYMBOL(imx_get_system_clk);
250
251 unsigned int imx_get_mcu_clk(void)
252 {
253 return imx_decode_pll(MPCTL0, CLK32 * 512);
254 }
255 EXPORT_SYMBOL(imx_get_mcu_clk);
256
257 /*
258 * get peripheral clock 1 ( UART[12], Timer[12], PWM )
259 */
260 unsigned int imx_get_perclk1(void)
261 {
262 return imx_get_system_clk() / (((PCDR) & 0xf)+1);
263 }
264 EXPORT_SYMBOL(imx_get_perclk1);
265
266 /*
267 * get peripheral clock 2 ( LCD, SD, SPI[12] )
268 */
269 unsigned int imx_get_perclk2(void)
270 {
271 return imx_get_system_clk() / (((PCDR>>4) & 0xf)+1);
272 }
273 EXPORT_SYMBOL(imx_get_perclk2);
274
275 /*
276 * get peripheral clock 3 ( SSI )
277 */
278 unsigned int imx_get_perclk3(void)
279 {
280 return imx_get_system_clk() / (((PCDR>>16) & 0x7f)+1);
281 }
282 EXPORT_SYMBOL(imx_get_perclk3);
283
284 /*
285 * get hclk ( SDRAM, CSI, Memory Stick, I2C, DMA )
286 */
287 unsigned int imx_get_hclk(void)
288 {
289 return imx_get_system_clk() / (((CSCR>>10) & 0xf)+1);
290 }
291 EXPORT_SYMBOL(imx_get_hclk);
292
293 static struct resource imx_mmc_resources[] = {
294 [0] = {
295 .start = 0x00214000,
296 .end = 0x002140FF,
297 .flags = IORESOURCE_MEM,
298 },
299 [1] = {
300 .start = (SDHC_INT),
301 .end = (SDHC_INT),
302 .flags = IORESOURCE_IRQ,
303 },
304 };
305
306 static u64 imxmmmc_dmamask = 0xffffffffUL;
307
308 static struct platform_device imx_mmc_device = {
309 .name = "imx-mmc",
310 .id = 0,
311 .dev = {
312 .dma_mask = &imxmmmc_dmamask,
313 .coherent_dma_mask = 0xffffffff,
314 },
315 .num_resources = ARRAY_SIZE(imx_mmc_resources),
316 .resource = imx_mmc_resources,
317 };
318
319 void __init imx_set_mmc_info(struct imxmmc_platform_data *info)
320 {
321 imx_mmc_device.dev.platform_data = info;
322 }
323
324 static struct imxfb_mach_info imx_fb_info;
325
326 void __init set_imx_fb_info(struct imxfb_mach_info *hard_imx_fb_info)
327 {
328 memcpy(&imx_fb_info,hard_imx_fb_info,sizeof(struct imxfb_mach_info));
329 }
330 EXPORT_SYMBOL(set_imx_fb_info);
331
332 static struct resource imxfb_resources[] = {
333 [0] = {
334 .start = 0x00205000,
335 .end = 0x002050FF,
336 .flags = IORESOURCE_MEM,
337 },
338 [1] = {
339 .start = LCDC_INT,
340 .end = LCDC_INT,
341 .flags = IORESOURCE_IRQ,
342 },
343 };
344
345 static u64 fb_dma_mask = ~(u64)0;
346
347 static struct platform_device imxfb_device = {
348 .name = "imx-fb",
349 .id = 0,
350 .dev = {
351 .platform_data = &imx_fb_info,
352 .dma_mask = &fb_dma_mask,
353 .coherent_dma_mask = 0xffffffff,
354 },
355 .num_resources = ARRAY_SIZE(imxfb_resources),
356 .resource = imxfb_resources,
357 };
358
359 static struct platform_device *devices[] __initdata = {
360 &imx_mmc_device,
361 &imxfb_device,
362 };
363
364 static struct map_desc imx_io_desc[] __initdata = {
365 {
366 .virtual = IMX_IO_BASE,
367 .pfn = __phys_to_pfn(IMX_IO_PHYS),
368 .length = IMX_IO_SIZE,
369 .type = MT_DEVICE
370 }
371 };
372
373 void __init
374 imx_map_io(void)
375 {
376 iotable_init(imx_io_desc, ARRAY_SIZE(imx_io_desc));
377 }
378
379 static int __init imx_init(void)
380 {
381 return platform_add_devices(devices, ARRAY_SIZE(devices));
382 }
383
384 subsys_initcall(imx_init);
385
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