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1da177e4 LT |
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 | */ | |
d052d1be | 25 | #include <linux/platform_device.h> |
1da177e4 LT |
26 | #include <linux/init.h> |
27 | #include <linux/kernel.h> | |
28 | #include <linux/module.h> | |
4e57b681 TS |
29 | #include <linux/string.h> |
30 | ||
b3e6a508 | 31 | #include <asm/errno.h> |
a09e64fb RK |
32 | #include <mach/imxfb.h> |
33 | #include <mach/hardware.h> | |
34 | #include <mach/imx-regs.h> | |
1da177e4 LT |
35 | |
36 | #include <asm/mach/map.h> | |
a09e64fb RK |
37 | #include <mach/mmc.h> |
38 | #include <mach/gpio.h> | |
b3e6a508 PP |
39 | |
40 | unsigned long imx_gpio_alloc_map[(GPIO_PORT_MAX + 1) * 32 / BITS_PER_LONG]; | |
1da177e4 LT |
41 | |
42 | void imx_gpio_mode(int gpio_mode) | |
43 | { | |
44 | unsigned int pin = gpio_mode & GPIO_PIN_MASK; | |
0a5b0aa8 SH |
45 | unsigned int port = (gpio_mode & GPIO_PORT_MASK) >> GPIO_PORT_SHIFT; |
46 | unsigned int ocr = (gpio_mode & GPIO_OCR_MASK) >> GPIO_OCR_SHIFT; | |
1da177e4 LT |
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? */ | |
0a5b0aa8 | 68 | if(gpio_mode & GPIO_GIUS) |
1da177e4 LT |
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 | ||
0a5b0aa8 SH |
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); | |
1da177e4 LT |
87 | } else { |
88 | tmp = OCR2(port); | |
89 | tmp &= ~( 3<<((pin-16)*2)); | |
90 | tmp |= (ocr << ((pin-16)*2)); | |
91 | OCR2(port) = tmp; | |
92 | ||
0a5b0aa8 SH |
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); | |
1da177e4 LT |
97 | } |
98 | } | |
99 | ||
100 | EXPORT_SYMBOL(imx_gpio_mode); | |
101 | ||
b3e6a508 PP |
102 | int imx_gpio_request(unsigned gpio, const char *label) |
103 | { | |
a98b38b8 | 104 | if(gpio >= (GPIO_PORT_MAX + 1) * 32) { |
b3e6a508 PP |
105 | printk(KERN_ERR "imx_gpio: Attempt to request nonexistent GPIO %d for \"%s\"\n", |
106 | gpio, label ? label : "?"); | |
107 | return -EINVAL; | |
a98b38b8 | 108 | } |
b3e6a508 PP |
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 | { | |
a98b38b8 | 133 | imx_gpio_mode(gpio | GPIO_IN | GPIO_GIUS | GPIO_DR); |
b3e6a508 PP |
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); | |
a228d6e7 | 142 | imx_gpio_mode(gpio | GPIO_OUT | GPIO_GIUS | GPIO_DR); |
b3e6a508 PP |
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 | ||
1da177e4 LT |
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 | ||
56ca9040 PP |
230 | static u64 imxmmmc_dmamask = 0xffffffffUL; |
231 | ||
1da177e4 LT |
232 | static struct platform_device imx_mmc_device = { |
233 | .name = "imx-mmc", | |
234 | .id = 0, | |
56ca9040 PP |
235 | .dev = { |
236 | .dma_mask = &imxmmmc_dmamask, | |
237 | .coherent_dma_mask = 0xffffffff, | |
238 | }, | |
1da177e4 LT |
239 | .num_resources = ARRAY_SIZE(imx_mmc_resources), |
240 | .resource = imx_mmc_resources, | |
241 | }; | |
242 | ||
56ca9040 PP |
243 | void __init imx_set_mmc_info(struct imxmmc_platform_data *info) |
244 | { | |
245 | imx_mmc_device.dev.platform_data = info; | |
246 | } | |
56ca9040 | 247 | |
96cb7672 | 248 | static struct imx_fb_platform_data imx_fb_info; |
a493820d | 249 | |
96cb7672 | 250 | void __init set_imx_fb_info(struct imx_fb_platform_data *hard_imx_fb_info) |
a493820d | 251 | { |
96cb7672 | 252 | memcpy(&imx_fb_info,hard_imx_fb_info,sizeof(struct imx_fb_platform_data)); |
a493820d | 253 | } |
a493820d | 254 | |
1da177e4 LT |
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 | ||
a493820d SH |
268 | static u64 fb_dma_mask = ~(u64)0; |
269 | ||
1da177e4 LT |
270 | static struct platform_device imxfb_device = { |
271 | .name = "imx-fb", | |
272 | .id = 0, | |
a493820d SH |
273 | .dev = { |
274 | .platform_data = &imx_fb_info, | |
275 | .dma_mask = &fb_dma_mask, | |
276 | .coherent_dma_mask = 0xffffffff, | |
277 | }, | |
1da177e4 LT |
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, | |
1da177e4 LT |
285 | }; |
286 | ||
287 | static struct map_desc imx_io_desc[] __initdata = { | |
adecef74 DS |
288 | { |
289 | .virtual = IMX_IO_BASE, | |
290 | .pfn = __phys_to_pfn(IMX_IO_PHYS), | |
291 | .length = IMX_IO_SIZE, | |
292 | .type = MT_DEVICE | |
293 | } | |
1da177e4 LT |
294 | }; |
295 | ||
296 | void __init | |
297 | imx_map_io(void) | |
298 | { | |
299 | iotable_init(imx_io_desc, ARRAY_SIZE(imx_io_desc)); | |
300 | } | |
301 | ||
302 | static int __init imx_init(void) | |
303 | { | |
304 | return platform_add_devices(devices, ARRAY_SIZE(devices)); | |
305 | } | |
306 | ||
307 | subsys_initcall(imx_init); |