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 <mach/imxfb.h>
33 #include <mach/hardware.h>
34 #include <mach/imx-regs.h>
35
36 #include <asm/mach/map.h>
37 #include <mach/mmc.h>
38 #include <mach/gpio.h>
39
40 unsigned long imx_gpio_alloc_map[(GPIO_PORT_MAX + 1) * 32 / BITS_PER_LONG];
41
imx_gpio_mode(int gpio_mode)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
imx_gpio_request(unsigned gpio,const char * label)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
imx_gpio_free(unsigned gpio)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
imx_gpio_direction_input(unsigned gpio)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
imx_gpio_direction_output(unsigned gpio,int value)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
imx_gpio_setup_multiple_pins(const int * pin_list,unsigned count,int alloc_mode,const char * label)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
__imx_gpio_set_value(unsigned gpio,int value)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
imx_gpio_to_irq(unsigned gpio)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
imx_irq_to_gpio(unsigned irq)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 static struct resource imx_mmc_resources[] = {
218 [0] = {
219 .start = 0x00214000,
220 .end = 0x002140FF,
221 .flags = IORESOURCE_MEM,
222 },
223 [1] = {
224 .start = (SDHC_INT),
225 .end = (SDHC_INT),
226 .flags = IORESOURCE_IRQ,
227 },
228 };
229
230 static u64 imxmmmc_dmamask = 0xffffffffUL;
231
232 static struct platform_device imx_mmc_device = {
233 .name = "imx-mmc",
234 .id = 0,
235 .dev = {
236 .dma_mask = &imxmmmc_dmamask,
237 .coherent_dma_mask = 0xffffffff,
238 },
239 .num_resources = ARRAY_SIZE(imx_mmc_resources),
240 .resource = imx_mmc_resources,
241 };
242
imx_set_mmc_info(struct imxmmc_platform_data * info)243 void __init imx_set_mmc_info(struct imxmmc_platform_data *info)
244 {
245 imx_mmc_device.dev.platform_data = info;
246 }
247
248 static struct imx_fb_platform_data imx_fb_info;
249
set_imx_fb_info(struct imx_fb_platform_data * hard_imx_fb_info)250 void __init set_imx_fb_info(struct imx_fb_platform_data *hard_imx_fb_info)
251 {
252 memcpy(&imx_fb_info,hard_imx_fb_info,sizeof(struct imx_fb_platform_data));
253 }
254
255 static struct resource imxfb_resources[] = {
256 [0] = {
257 .start = 0x00205000,
258 .end = 0x002050FF,
259 .flags = IORESOURCE_MEM,
260 },
261 [1] = {
262 .start = LCDC_INT,
263 .end = LCDC_INT,
264 .flags = IORESOURCE_IRQ,
265 },
266 };
267
268 static u64 fb_dma_mask = ~(u64)0;
269
270 static struct platform_device imxfb_device = {
271 .name = "imx-fb",
272 .id = 0,
273 .dev = {
274 .platform_data = &imx_fb_info,
275 .dma_mask = &fb_dma_mask,
276 .coherent_dma_mask = 0xffffffff,
277 },
278 .num_resources = ARRAY_SIZE(imxfb_resources),
279 .resource = imxfb_resources,
280 };
281
282 static struct platform_device *devices[] __initdata = {
283 &imx_mmc_device,
284 &imxfb_device,
285 };
286
287 static struct map_desc imx_io_desc[] __initdata = {
288 {
289 .virtual = IMX_IO_BASE,
290 .pfn = __phys_to_pfn(IMX_IO_PHYS),
291 .length = IMX_IO_SIZE,
292 .type = MT_DEVICE
293 }
294 };
295
296 void __init
imx_map_io(void)297 imx_map_io(void)
298 {
299 iotable_init(imx_io_desc, ARRAY_SIZE(imx_io_desc));
300 }
301
imx_init(void)302 static int __init imx_init(void)
303 {
304 return platform_add_devices(devices, ARRAY_SIZE(devices));
305 }
306
307 subsys_initcall(imx_init);
308