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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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 */
Russell Kingd052d1b2005-10-29 19:07:23 +010025#include <linux/platform_device.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070026#include <linux/init.h>
27#include <linux/kernel.h>
28#include <linux/module.h>
Tim Schmielau4e57b682005-10-30 15:03:48 -080029#include <linux/string.h>
30
Sascha Hauera4938202005-05-03 22:57:56 +010031#include <asm/arch/imxfb.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070032#include <asm/hardware.h>
Sascha Hauer0a5b0aa2005-10-04 23:17:52 +010033#include <asm/arch/imx-regs.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070034
35#include <asm/mach/map.h>
36
37void imx_gpio_mode(int gpio_mode)
38{
39 unsigned int pin = gpio_mode & GPIO_PIN_MASK;
Sascha Hauer0a5b0aa2005-10-04 23:17:52 +010040 unsigned int port = (gpio_mode & GPIO_PORT_MASK) >> GPIO_PORT_SHIFT;
41 unsigned int ocr = (gpio_mode & GPIO_OCR_MASK) >> GPIO_OCR_SHIFT;
Linus Torvalds1da177e2005-04-16 15:20:36 -070042 unsigned int tmp;
43
44 /* Pullup enable */
45 if(gpio_mode & GPIO_PUEN)
46 PUEN(port) |= (1<<pin);
47 else
48 PUEN(port) &= ~(1<<pin);
49
50 /* Data direction */
51 if(gpio_mode & GPIO_OUT)
52 DDIR(port) |= 1<<pin;
53 else
54 DDIR(port) &= ~(1<<pin);
55
56 /* Primary / alternate function */
57 if(gpio_mode & GPIO_AF)
58 GPR(port) |= (1<<pin);
59 else
60 GPR(port) &= ~(1<<pin);
61
62 /* use as gpio? */
Sascha Hauer0a5b0aa2005-10-04 23:17:52 +010063 if(gpio_mode & GPIO_GIUS)
Linus Torvalds1da177e2005-04-16 15:20:36 -070064 GIUS(port) |= (1<<pin);
65 else
66 GIUS(port) &= ~(1<<pin);
67
68 /* Output / input configuration */
69 /* FIXME: I'm not very sure about OCR and ICONF, someone
70 * should have a look over it
71 */
72 if(pin<16) {
73 tmp = OCR1(port);
74 tmp &= ~( 3<<(pin*2));
75 tmp |= (ocr << (pin*2));
76 OCR1(port) = tmp;
77
Sascha Hauer0a5b0aa2005-10-04 23:17:52 +010078 ICONFA1(port) &= ~( 3<<(pin*2));
79 ICONFA1(port) |= ((gpio_mode >> GPIO_AOUT_SHIFT) & 3) << (pin * 2);
80 ICONFB1(port) &= ~( 3<<(pin*2));
81 ICONFB1(port) |= ((gpio_mode >> GPIO_BOUT_SHIFT) & 3) << (pin * 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -070082 } else {
83 tmp = OCR2(port);
84 tmp &= ~( 3<<((pin-16)*2));
85 tmp |= (ocr << ((pin-16)*2));
86 OCR2(port) = tmp;
87
Sascha Hauer0a5b0aa2005-10-04 23:17:52 +010088 ICONFA2(port) &= ~( 3<<((pin-16)*2));
89 ICONFA2(port) |= ((gpio_mode >> GPIO_AOUT_SHIFT) & 3) << ((pin-16) * 2);
90 ICONFB2(port) &= ~( 3<<((pin-16)*2));
91 ICONFB2(port) |= ((gpio_mode >> GPIO_BOUT_SHIFT) & 3) << ((pin-16) * 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -070092 }
93}
94
95EXPORT_SYMBOL(imx_gpio_mode);
96
97/*
98 * get the system pll clock in Hz
99 *
100 * mfi + mfn / (mfd +1)
101 * f = 2 * f_ref * --------------------
102 * pd + 1
103 */
104static unsigned int imx_decode_pll(unsigned int pll)
105{
106 u32 mfi = (pll >> 10) & 0xf;
107 u32 mfn = pll & 0x3ff;
108 u32 mfd = (pll >> 16) & 0x3ff;
109 u32 pd = (pll >> 26) & 0xf;
110 u32 f_ref = (CSCR & CSCR_SYSTEM_SEL) ? 16000000 : (CLK32 * 512);
111
112 mfi = mfi <= 5 ? 5 : mfi;
113
114 return (2 * (f_ref>>10) * ( (mfi<<10) + (mfn<<10) / (mfd+1) )) / (pd+1);
115}
116
117unsigned int imx_get_system_clk(void)
118{
119 return imx_decode_pll(SPCTL0);
120}
121EXPORT_SYMBOL(imx_get_system_clk);
122
123unsigned int imx_get_mcu_clk(void)
124{
125 return imx_decode_pll(MPCTL0);
126}
127EXPORT_SYMBOL(imx_get_mcu_clk);
128
129/*
130 * get peripheral clock 1 ( UART[12], Timer[12], PWM )
131 */
132unsigned int imx_get_perclk1(void)
133{
134 return imx_get_system_clk() / (((PCDR) & 0xf)+1);
135}
136EXPORT_SYMBOL(imx_get_perclk1);
137
138/*
139 * get peripheral clock 2 ( LCD, SD, SPI[12] )
140 */
141unsigned int imx_get_perclk2(void)
142{
143 return imx_get_system_clk() / (((PCDR>>4) & 0xf)+1);
144}
145EXPORT_SYMBOL(imx_get_perclk2);
146
147/*
148 * get peripheral clock 3 ( SSI )
149 */
150unsigned int imx_get_perclk3(void)
151{
152 return imx_get_system_clk() / (((PCDR>>16) & 0x7f)+1);
153}
154EXPORT_SYMBOL(imx_get_perclk3);
155
156/*
157 * get hclk ( SDRAM, CSI, Memory Stick, I2C, DMA )
158 */
159unsigned int imx_get_hclk(void)
160{
161 return imx_get_system_clk() / (((CSCR>>10) & 0xf)+1);
162}
163EXPORT_SYMBOL(imx_get_hclk);
164
165static struct resource imx_mmc_resources[] = {
166 [0] = {
167 .start = 0x00214000,
168 .end = 0x002140FF,
169 .flags = IORESOURCE_MEM,
170 },
171 [1] = {
172 .start = (SDHC_INT),
173 .end = (SDHC_INT),
174 .flags = IORESOURCE_IRQ,
175 },
176};
177
178static struct platform_device imx_mmc_device = {
179 .name = "imx-mmc",
180 .id = 0,
181 .num_resources = ARRAY_SIZE(imx_mmc_resources),
182 .resource = imx_mmc_resources,
183};
184
185static struct resource imx_uart1_resources[] = {
186 [0] = {
187 .start = 0x00206000,
188 .end = 0x002060FF,
189 .flags = IORESOURCE_MEM,
190 },
191 [1] = {
192 .start = (UART1_MINT_RX),
193 .end = (UART1_MINT_RX),
194 .flags = IORESOURCE_IRQ,
195 },
196 [2] = {
197 .start = (UART1_MINT_TX),
198 .end = (UART1_MINT_TX),
199 .flags = IORESOURCE_IRQ,
200 },
201};
202
203static struct platform_device imx_uart1_device = {
204 .name = "imx-uart",
205 .id = 0,
206 .num_resources = ARRAY_SIZE(imx_uart1_resources),
207 .resource = imx_uart1_resources,
208};
209
210static struct resource imx_uart2_resources[] = {
211 [0] = {
212 .start = 0x00207000,
213 .end = 0x002070FF,
214 .flags = IORESOURCE_MEM,
215 },
216 [1] = {
217 .start = (UART2_MINT_RX),
218 .end = (UART2_MINT_RX),
219 .flags = IORESOURCE_IRQ,
220 },
221 [2] = {
222 .start = (UART2_MINT_TX),
223 .end = (UART2_MINT_TX),
224 .flags = IORESOURCE_IRQ,
225 },
226};
227
228static struct platform_device imx_uart2_device = {
229 .name = "imx-uart",
230 .id = 1,
231 .num_resources = ARRAY_SIZE(imx_uart2_resources),
232 .resource = imx_uart2_resources,
233};
234
Sascha Hauera4938202005-05-03 22:57:56 +0100235static struct imxfb_mach_info imx_fb_info;
236
237void __init set_imx_fb_info(struct imxfb_mach_info *hard_imx_fb_info)
238{
239 memcpy(&imx_fb_info,hard_imx_fb_info,sizeof(struct imxfb_mach_info));
240}
241EXPORT_SYMBOL(set_imx_fb_info);
242
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243static struct resource imxfb_resources[] = {
244 [0] = {
245 .start = 0x00205000,
246 .end = 0x002050FF,
247 .flags = IORESOURCE_MEM,
248 },
249 [1] = {
250 .start = LCDC_INT,
251 .end = LCDC_INT,
252 .flags = IORESOURCE_IRQ,
253 },
254};
255
Sascha Hauera4938202005-05-03 22:57:56 +0100256static u64 fb_dma_mask = ~(u64)0;
257
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258static struct platform_device imxfb_device = {
259 .name = "imx-fb",
260 .id = 0,
Sascha Hauera4938202005-05-03 22:57:56 +0100261 .dev = {
262 .platform_data = &imx_fb_info,
263 .dma_mask = &fb_dma_mask,
264 .coherent_dma_mask = 0xffffffff,
265 },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266 .num_resources = ARRAY_SIZE(imxfb_resources),
267 .resource = imxfb_resources,
268};
269
270static struct platform_device *devices[] __initdata = {
271 &imx_mmc_device,
272 &imxfb_device,
273 &imx_uart1_device,
274 &imx_uart2_device,
275};
276
277static struct map_desc imx_io_desc[] __initdata = {
Deepak Saxenaadecef72005-10-28 15:19:10 +0100278 {
279 .virtual = IMX_IO_BASE,
280 .pfn = __phys_to_pfn(IMX_IO_PHYS),
281 .length = IMX_IO_SIZE,
282 .type = MT_DEVICE
283 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284};
285
286void __init
287imx_map_io(void)
288{
289 iotable_init(imx_io_desc, ARRAY_SIZE(imx_io_desc));
290}
291
292static int __init imx_init(void)
293{
294 return platform_add_devices(devices, ARRAY_SIZE(devices));
295}
296
297subsys_initcall(imx_init);