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/device.h>
26 #include <linux/init.h>
27 #include <linux/kernel.h>
28 #include <linux/module.h>
29 #include <asm/arch/imxfb.h>
30 #include <asm/hardware.h>
32 #include <asm/mach/map.h>
34 void imx_gpio_mode(int gpio_mode)
36 unsigned int pin = gpio_mode & GPIO_PIN_MASK;
37 unsigned int port = (gpio_mode & GPIO_PORT_MASK) >> 5;
38 unsigned int ocr = (gpio_mode & GPIO_OCR_MASK) >> 10;
42 if(gpio_mode & GPIO_PUEN)
43 PUEN(port) |= (1<<pin);
45 PUEN(port) &= ~(1<<pin);
48 if(gpio_mode & GPIO_OUT)
51 DDIR(port) &= ~(1<<pin);
53 /* Primary / alternate function */
54 if(gpio_mode & GPIO_AF)
55 GPR(port) |= (1<<pin);
57 GPR(port) &= ~(1<<pin);
61 GIUS(port) |= (1<<pin);
63 GIUS(port) &= ~(1<<pin);
65 /* Output / input configuration */
66 /* FIXME: I'm not very sure about OCR and ICONF, someone
67 * should have a look over it
71 tmp &= ~( 3<<(pin*2));
72 tmp |= (ocr << (pin*2));
75 if( gpio_mode & GPIO_AOUT )
76 ICONFA1(port) &= ~( 3<<(pin*2));
77 if( gpio_mode & GPIO_BOUT )
78 ICONFB1(port) &= ~( 3<<(pin*2));
81 tmp &= ~( 3<<((pin-16)*2));
82 tmp |= (ocr << ((pin-16)*2));
85 if( gpio_mode & GPIO_AOUT )
86 ICONFA2(port) &= ~( 3<<((pin-16)*2));
87 if( gpio_mode & GPIO_BOUT )
88 ICONFB2(port) &= ~( 3<<((pin-16)*2));
92 EXPORT_SYMBOL(imx_gpio_mode);
95 * get the system pll clock in Hz
97 * mfi + mfn / (mfd +1)
98 * f = 2 * f_ref * --------------------
101 static unsigned int imx_decode_pll(unsigned int pll)
103 u32 mfi = (pll >> 10) & 0xf;
104 u32 mfn = pll & 0x3ff;
105 u32 mfd = (pll >> 16) & 0x3ff;
106 u32 pd = (pll >> 26) & 0xf;
107 u32 f_ref = (CSCR & CSCR_SYSTEM_SEL) ? 16000000 : (CLK32 * 512);
109 mfi = mfi <= 5 ? 5 : mfi;
111 return (2 * (f_ref>>10) * ( (mfi<<10) + (mfn<<10) / (mfd+1) )) / (pd+1);
114 unsigned int imx_get_system_clk(void)
116 return imx_decode_pll(SPCTL0);
118 EXPORT_SYMBOL(imx_get_system_clk);
120 unsigned int imx_get_mcu_clk(void)
122 return imx_decode_pll(MPCTL0);
124 EXPORT_SYMBOL(imx_get_mcu_clk);
127 * get peripheral clock 1 ( UART[12], Timer[12], PWM )
129 unsigned int imx_get_perclk1(void)
131 return imx_get_system_clk() / (((PCDR) & 0xf)+1);
133 EXPORT_SYMBOL(imx_get_perclk1);
136 * get peripheral clock 2 ( LCD, SD, SPI[12] )
138 unsigned int imx_get_perclk2(void)
140 return imx_get_system_clk() / (((PCDR>>4) & 0xf)+1);
142 EXPORT_SYMBOL(imx_get_perclk2);
145 * get peripheral clock 3 ( SSI )
147 unsigned int imx_get_perclk3(void)
149 return imx_get_system_clk() / (((PCDR>>16) & 0x7f)+1);
151 EXPORT_SYMBOL(imx_get_perclk3);
154 * get hclk ( SDRAM, CSI, Memory Stick, I2C, DMA )
156 unsigned int imx_get_hclk(void)
158 return imx_get_system_clk() / (((CSCR>>10) & 0xf)+1);
160 EXPORT_SYMBOL(imx_get_hclk);
162 static struct resource imx_mmc_resources[] = {
166 .flags = IORESOURCE_MEM,
171 .flags = IORESOURCE_IRQ,
175 static struct platform_device imx_mmc_device = {
178 .num_resources = ARRAY_SIZE(imx_mmc_resources),
179 .resource = imx_mmc_resources,
182 static struct resource imx_uart1_resources[] = {
186 .flags = IORESOURCE_MEM,
189 .start = (UART1_MINT_RX),
190 .end = (UART1_MINT_RX),
191 .flags = IORESOURCE_IRQ,
194 .start = (UART1_MINT_TX),
195 .end = (UART1_MINT_TX),
196 .flags = IORESOURCE_IRQ,
200 static struct platform_device imx_uart1_device = {
203 .num_resources = ARRAY_SIZE(imx_uart1_resources),
204 .resource = imx_uart1_resources,
207 static struct resource imx_uart2_resources[] = {
211 .flags = IORESOURCE_MEM,
214 .start = (UART2_MINT_RX),
215 .end = (UART2_MINT_RX),
216 .flags = IORESOURCE_IRQ,
219 .start = (UART2_MINT_TX),
220 .end = (UART2_MINT_TX),
221 .flags = IORESOURCE_IRQ,
225 static struct platform_device imx_uart2_device = {
228 .num_resources = ARRAY_SIZE(imx_uart2_resources),
229 .resource = imx_uart2_resources,
232 static struct imxfb_mach_info imx_fb_info;
234 void __init set_imx_fb_info(struct imxfb_mach_info *hard_imx_fb_info)
236 memcpy(&imx_fb_info,hard_imx_fb_info,sizeof(struct imxfb_mach_info));
238 EXPORT_SYMBOL(set_imx_fb_info);
240 static struct resource imxfb_resources[] = {
244 .flags = IORESOURCE_MEM,
249 .flags = IORESOURCE_IRQ,
253 static u64 fb_dma_mask = ~(u64)0;
255 static struct platform_device imxfb_device = {
259 .platform_data = &imx_fb_info,
260 .dma_mask = &fb_dma_mask,
261 .coherent_dma_mask = 0xffffffff,
263 .num_resources = ARRAY_SIZE(imxfb_resources),
264 .resource = imxfb_resources,
267 static struct platform_device *devices[] __initdata = {
274 static struct map_desc imx_io_desc[] __initdata = {
275 /* virtual physical length type */
276 {IMX_IO_BASE, IMX_IO_PHYS, IMX_IO_SIZE, MT_DEVICE},
282 iotable_init(imx_io_desc, ARRAY_SIZE(imx_io_desc));
285 static int __init imx_init(void)
287 return platform_add_devices(devices, ARRAY_SIZE(devices));
290 subsys_initcall(imx_init);