summaryrefslogtreecommitdiffstats
path: root/arch/arm/mach-imx/generic.c
blob: b5aa49d00ca388cce26ea6bcb1c8e9b972c18c80 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
/*
 *  arch/arm/mach-imx/generic.c
 *
 *  author: Sascha Hauer
 *  Created: april 20th, 2004
 *  Copyright: Synertronixx GmbH
 *
 *  Common code for i.MX machines
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */
#include <linux/platform_device.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/string.h>

#include <asm/arch/imxfb.h>
#include <asm/hardware.h>
#include <asm/arch/imx-regs.h>

#include <asm/mach/map.h>
#include <asm/arch/mmc.h>

void imx_gpio_mode(int gpio_mode)
{
	unsigned int pin = gpio_mode & GPIO_PIN_MASK;
	unsigned int port = (gpio_mode & GPIO_PORT_MASK) >> GPIO_PORT_SHIFT;
	unsigned int ocr = (gpio_mode & GPIO_OCR_MASK) >> GPIO_OCR_SHIFT;
	unsigned int tmp;

	/* Pullup enable */
	if(gpio_mode & GPIO_PUEN)
		PUEN(port) |= (1<<pin);
	else
		PUEN(port) &= ~(1<<pin);

	/* Data direction */
	if(gpio_mode & GPIO_OUT)
		DDIR(port) |= 1<<pin;
	else
		DDIR(port) &= ~(1<<pin);

	/* Primary / alternate function */
	if(gpio_mode & GPIO_AF)
		GPR(port) |= (1<<pin);
	else
		GPR(port) &= ~(1<<pin);

	/* use as gpio? */
	if(gpio_mode &  GPIO_GIUS)
		GIUS(port) |= (1<<pin);
	else
		GIUS(port) &= ~(1<<pin);

	/* Output / input configuration */
	/* FIXME: I'm not very sure about OCR and ICONF, someone
	 * should have a look over it
	 */
	if(pin<16) {
		tmp = OCR1(port);
		tmp &= ~( 3<<(pin*2));
		tmp |= (ocr << (pin*2));
		OCR1(port) = tmp;

		ICONFA1(port) &= ~( 3<<(pin*2));
		ICONFA1(port) |= ((gpio_mode >> GPIO_AOUT_SHIFT) & 3) << (pin * 2);
		ICONFB1(port) &= ~( 3<<(pin*2));
		ICONFB1(port) |= ((gpio_mode >> GPIO_BOUT_SHIFT) & 3) << (pin * 2);
	} else {
		tmp = OCR2(port);
		tmp &= ~( 3<<((pin-16)*2));
		tmp |= (ocr << ((pin-16)*2));
		OCR2(port) = tmp;

		ICONFA2(port) &= ~( 3<<((pin-16)*2));
		ICONFA2(port) |= ((gpio_mode >> GPIO_AOUT_SHIFT) & 3) << ((pin-16) * 2);
		ICONFB2(port) &= ~( 3<<((pin-16)*2));
		ICONFB2(port) |= ((gpio_mode >> GPIO_BOUT_SHIFT) & 3) << ((pin-16) * 2);
	}
}

EXPORT_SYMBOL(imx_gpio_mode);

/*
 *  get the system pll clock in Hz
 *
 *                  mfi + mfn / (mfd +1)
 *  f = 2 * f_ref * --------------------
 *                        pd + 1
 */
static unsigned int imx_decode_pll(unsigned int pll)
{
	unsigned long long ll;
	unsigned long quot;

	u32 mfi = (pll >> 10) & 0xf;
	u32 mfn = pll & 0x3ff;
	u32 mfd = (pll >> 16) & 0x3ff;
	u32 pd =  (pll >> 26) & 0xf;
	u32 f_ref = (CSCR & CSCR_SYSTEM_SEL) ? 16000000 : (CLK32 * 512);

	mfi = mfi <= 5 ? 5 : mfi;

	ll = 2 * (unsigned long long)f_ref * ( (mfi<<16) + (mfn<<16) / (mfd+1) );
	quot = (pd+1) * (1<<16);
	ll += quot / 2;
	do_div(ll, quot);
	return (unsigned int) ll;
}

unsigned int imx_get_system_clk(void)
{
	return imx_decode_pll(SPCTL0);
}
EXPORT_SYMBOL(imx_get_system_clk);

unsigned int imx_get_mcu_clk(void)
{
	return imx_decode_pll(MPCTL0);
}
EXPORT_SYMBOL(imx_get_mcu_clk);

/*
 *  get peripheral clock 1 ( UART[12], Timer[12], PWM )
 */
unsigned int imx_get_perclk1(void)
{
	return imx_get_system_clk() / (((PCDR) & 0xf)+1);
}
EXPORT_SYMBOL(imx_get_perclk1);

/*
 *  get peripheral clock 2 ( LCD, SD, SPI[12] )
 */
unsigned int imx_get_perclk2(void)
{
	return imx_get_system_clk() / (((PCDR>>4) & 0xf)+1);
}
EXPORT_SYMBOL(imx_get_perclk2);

/*
 *  get peripheral clock 3 ( SSI )
 */
unsigned int imx_get_perclk3(void)
{
	return imx_get_system_clk() / (((PCDR>>16) & 0x7f)+1);
}
EXPORT_SYMBOL(imx_get_perclk3);

/*
 *  get hclk ( SDRAM, CSI, Memory Stick, I2C, DMA )
 */
unsigned int imx_get_hclk(void)
{
	return imx_get_system_clk() / (((CSCR>>10) & 0xf)+1);
}
EXPORT_SYMBOL(imx_get_hclk);

static struct resource imx_mmc_resources[] = {
	[0] = {
		.start	= 0x00214000,
		.end	= 0x002140FF,
		.flags	= IORESOURCE_MEM,
	},
	[1] = {
		.start	= (SDHC_INT),
		.end	= (SDHC_INT),
		.flags	= IORESOURCE_IRQ,
	},
};

static u64 imxmmmc_dmamask = 0xffffffffUL;

static struct platform_device imx_mmc_device = {
	.name		= "imx-mmc",
	.id		= 0,
	.dev		= {
		.dma_mask = &imxmmmc_dmamask,
		.coherent_dma_mask = 0xffffffff,
	},
	.num_resources	= ARRAY_SIZE(imx_mmc_resources),
	.resource	= imx_mmc_resources,
};

void __init imx_set_mmc_info(struct imxmmc_platform_data *info)
{
	imx_mmc_device.dev.platform_data = info;
}
EXPORT_SYMBOL(imx_set_mmc_info);

static struct imxfb_mach_info imx_fb_info;

void __init set_imx_fb_info(struct imxfb_mach_info *hard_imx_fb_info)
{
	memcpy(&imx_fb_info,hard_imx_fb_info,sizeof(struct imxfb_mach_info));
}
EXPORT_SYMBOL(set_imx_fb_info);

static struct resource imxfb_resources[] = {
	[0] = {
		.start	= 0x00205000,
		.end	= 0x002050FF,
		.flags	= IORESOURCE_MEM,
	},
	[1] = {
		.start	= LCDC_INT,
		.end	= LCDC_INT,
		.flags	= IORESOURCE_IRQ,
	},
};

static u64 fb_dma_mask = ~(u64)0;

static struct platform_device imxfb_device = {
	.name		= "imx-fb",
	.id		= 0,
	.dev		= {
 		.platform_data	= &imx_fb_info,
		.dma_mask	= &fb_dma_mask,
		.coherent_dma_mask = 0xffffffff,
	},
	.num_resources	= ARRAY_SIZE(imxfb_resources),
	.resource	= imxfb_resources,
};

static struct platform_device *devices[] __initdata = {
	&imx_mmc_device,
	&imxfb_device,
};

static struct map_desc imx_io_desc[] __initdata = {
	{
		.virtual	= IMX_IO_BASE,
		.pfn		= __phys_to_pfn(IMX_IO_PHYS),
		.length		= IMX_IO_SIZE,
		.type		= MT_DEVICE
	}
};

void __init
imx_map_io(void)
{
	iotable_init(imx_io_desc, ARRAY_SIZE(imx_io_desc));
}

static int __init imx_init(void)
{
	return platform_add_devices(devices, ARRAY_SIZE(devices));
}

subsys_initcall(imx_init);