2 * arch/arm/mach-imx/generic.c
5 * Created: april 20th, 2004
6 * Copyright: Synertronixx GmbH
8 * Common code for i.MX machines
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.
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.
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
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>
31 #include <asm/arch/imxfb.h>
32 #include <asm/hardware.h>
33 #include <asm/arch/imx-regs.h>
35 #include <asm/mach/map.h>
36 #include <asm/arch/mmc.h>
38 void imx_gpio_mode(int gpio_mode
)
40 unsigned int pin
= gpio_mode
& GPIO_PIN_MASK
;
41 unsigned int port
= (gpio_mode
& GPIO_PORT_MASK
) >> GPIO_PORT_SHIFT
;
42 unsigned int ocr
= (gpio_mode
& GPIO_OCR_MASK
) >> GPIO_OCR_SHIFT
;
46 if(gpio_mode
& GPIO_PUEN
)
47 PUEN(port
) |= (1<<pin
);
49 PUEN(port
) &= ~(1<<pin
);
52 if(gpio_mode
& GPIO_OUT
)
55 DDIR(port
) &= ~(1<<pin
);
57 /* Primary / alternate function */
58 if(gpio_mode
& GPIO_AF
)
59 GPR(port
) |= (1<<pin
);
61 GPR(port
) &= ~(1<<pin
);
64 if(gpio_mode
& GPIO_GIUS
)
65 GIUS(port
) |= (1<<pin
);
67 GIUS(port
) &= ~(1<<pin
);
69 /* Output / input configuration */
70 /* FIXME: I'm not very sure about OCR and ICONF, someone
71 * should have a look over it
75 tmp
&= ~( 3<<(pin
*2));
76 tmp
|= (ocr
<< (pin
*2));
79 ICONFA1(port
) &= ~( 3<<(pin
*2));
80 ICONFA1(port
) |= ((gpio_mode
>> GPIO_AOUT_SHIFT
) & 3) << (pin
* 2);
81 ICONFB1(port
) &= ~( 3<<(pin
*2));
82 ICONFB1(port
) |= ((gpio_mode
>> GPIO_BOUT_SHIFT
) & 3) << (pin
* 2);
85 tmp
&= ~( 3<<((pin
-16)*2));
86 tmp
|= (ocr
<< ((pin
-16)*2));
89 ICONFA2(port
) &= ~( 3<<((pin
-16)*2));
90 ICONFA2(port
) |= ((gpio_mode
>> GPIO_AOUT_SHIFT
) & 3) << ((pin
-16) * 2);
91 ICONFB2(port
) &= ~( 3<<((pin
-16)*2));
92 ICONFB2(port
) |= ((gpio_mode
>> GPIO_BOUT_SHIFT
) & 3) << ((pin
-16) * 2);
96 EXPORT_SYMBOL(imx_gpio_mode
);
99 * get the system pll clock in Hz
101 * mfi + mfn / (mfd +1)
102 * f = 2 * f_ref * --------------------
105 static unsigned int imx_decode_pll(unsigned int pll
, u32 f_ref
)
107 unsigned long long ll
;
110 u32 mfi
= (pll
>> 10) & 0xf;
111 u32 mfn
= pll
& 0x3ff;
112 u32 mfd
= (pll
>> 16) & 0x3ff;
113 u32 pd
= (pll
>> 26) & 0xf;
115 mfi
= mfi
<= 5 ? 5 : mfi
;
117 ll
= 2 * (unsigned long long)f_ref
* ( (mfi
<<16) + (mfn
<<16) / (mfd
+1) );
118 quot
= (pd
+1) * (1<<16);
121 return (unsigned int) ll
;
124 unsigned int imx_get_system_clk(void)
126 u32 f_ref
= (CSCR
& CSCR_SYSTEM_SEL
) ? 16000000 : (CLK32
* 512);
128 return imx_decode_pll(SPCTL0
, f_ref
);
130 EXPORT_SYMBOL(imx_get_system_clk
);
132 unsigned int imx_get_mcu_clk(void)
134 return imx_decode_pll(MPCTL0
, CLK32
* 512);
136 EXPORT_SYMBOL(imx_get_mcu_clk
);
139 * get peripheral clock 1 ( UART[12], Timer[12], PWM )
141 unsigned int imx_get_perclk1(void)
143 return imx_get_system_clk() / (((PCDR
) & 0xf)+1);
145 EXPORT_SYMBOL(imx_get_perclk1
);
148 * get peripheral clock 2 ( LCD, SD, SPI[12] )
150 unsigned int imx_get_perclk2(void)
152 return imx_get_system_clk() / (((PCDR
>>4) & 0xf)+1);
154 EXPORT_SYMBOL(imx_get_perclk2
);
157 * get peripheral clock 3 ( SSI )
159 unsigned int imx_get_perclk3(void)
161 return imx_get_system_clk() / (((PCDR
>>16) & 0x7f)+1);
163 EXPORT_SYMBOL(imx_get_perclk3
);
166 * get hclk ( SDRAM, CSI, Memory Stick, I2C, DMA )
168 unsigned int imx_get_hclk(void)
170 return imx_get_system_clk() / (((CSCR
>>10) & 0xf)+1);
172 EXPORT_SYMBOL(imx_get_hclk
);
174 static struct resource imx_mmc_resources
[] = {
178 .flags
= IORESOURCE_MEM
,
183 .flags
= IORESOURCE_IRQ
,
187 static u64 imxmmmc_dmamask
= 0xffffffffUL
;
189 static struct platform_device imx_mmc_device
= {
193 .dma_mask
= &imxmmmc_dmamask
,
194 .coherent_dma_mask
= 0xffffffff,
196 .num_resources
= ARRAY_SIZE(imx_mmc_resources
),
197 .resource
= imx_mmc_resources
,
200 void __init
imx_set_mmc_info(struct imxmmc_platform_data
*info
)
202 imx_mmc_device
.dev
.platform_data
= info
;
204 EXPORT_SYMBOL(imx_set_mmc_info
);
206 static struct imxfb_mach_info imx_fb_info
;
208 void __init
set_imx_fb_info(struct imxfb_mach_info
*hard_imx_fb_info
)
210 memcpy(&imx_fb_info
,hard_imx_fb_info
,sizeof(struct imxfb_mach_info
));
212 EXPORT_SYMBOL(set_imx_fb_info
);
214 static struct resource imxfb_resources
[] = {
218 .flags
= IORESOURCE_MEM
,
223 .flags
= IORESOURCE_IRQ
,
227 static u64 fb_dma_mask
= ~(u64
)0;
229 static struct platform_device imxfb_device
= {
233 .platform_data
= &imx_fb_info
,
234 .dma_mask
= &fb_dma_mask
,
235 .coherent_dma_mask
= 0xffffffff,
237 .num_resources
= ARRAY_SIZE(imxfb_resources
),
238 .resource
= imxfb_resources
,
241 static struct platform_device
*devices
[] __initdata
= {
246 static struct map_desc imx_io_desc
[] __initdata
= {
248 .virtual = IMX_IO_BASE
,
249 .pfn
= __phys_to_pfn(IMX_IO_PHYS
),
250 .length
= IMX_IO_SIZE
,
258 iotable_init(imx_io_desc
, ARRAY_SIZE(imx_io_desc
));
261 static int __init
imx_init(void)
263 return platform_add_devices(devices
, ARRAY_SIZE(devices
));
266 subsys_initcall(imx_init
);