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/hardware.h>
31 #include <asm/mach/map.h>
33 void imx_gpio_mode(int gpio_mode)
35 unsigned int pin = gpio_mode & GPIO_PIN_MASK;
36 unsigned int port = (gpio_mode & GPIO_PORT_MASK) >> 5;
37 unsigned int ocr = (gpio_mode & GPIO_OCR_MASK) >> 10;
41 if(gpio_mode & GPIO_PUEN)
42 PUEN(port) |= (1<<pin);
44 PUEN(port) &= ~(1<<pin);
47 if(gpio_mode & GPIO_OUT)
50 DDIR(port) &= ~(1<<pin);
52 /* Primary / alternate function */
53 if(gpio_mode & GPIO_AF)
54 GPR(port) |= (1<<pin);
56 GPR(port) &= ~(1<<pin);
60 GIUS(port) |= (1<<pin);
62 GIUS(port) &= ~(1<<pin);
64 /* Output / input configuration */
65 /* FIXME: I'm not very sure about OCR and ICONF, someone
66 * should have a look over it
70 tmp &= ~( 3<<(pin*2));
71 tmp |= (ocr << (pin*2));
74 if( gpio_mode & GPIO_AOUT )
75 ICONFA1(port) &= ~( 3<<(pin*2));
76 if( gpio_mode & GPIO_BOUT )
77 ICONFB1(port) &= ~( 3<<(pin*2));
80 tmp &= ~( 3<<((pin-16)*2));
81 tmp |= (ocr << ((pin-16)*2));
84 if( gpio_mode & GPIO_AOUT )
85 ICONFA2(port) &= ~( 3<<((pin-16)*2));
86 if( gpio_mode & GPIO_BOUT )
87 ICONFB2(port) &= ~( 3<<((pin-16)*2));
91 EXPORT_SYMBOL(imx_gpio_mode);
94 * get the system pll clock in Hz
96 * mfi + mfn / (mfd +1)
97 * f = 2 * f_ref * --------------------
100 static unsigned int imx_decode_pll(unsigned int pll)
102 u32 mfi = (pll >> 10) & 0xf;
103 u32 mfn = pll & 0x3ff;
104 u32 mfd = (pll >> 16) & 0x3ff;
105 u32 pd = (pll >> 26) & 0xf;
106 u32 f_ref = (CSCR & CSCR_SYSTEM_SEL) ? 16000000 : (CLK32 * 512);
108 mfi = mfi <= 5 ? 5 : mfi;
110 return (2 * (f_ref>>10) * ( (mfi<<10) + (mfn<<10) / (mfd+1) )) / (pd+1);
113 unsigned int imx_get_system_clk(void)
115 return imx_decode_pll(SPCTL0);
117 EXPORT_SYMBOL(imx_get_system_clk);
119 unsigned int imx_get_mcu_clk(void)
121 return imx_decode_pll(MPCTL0);
123 EXPORT_SYMBOL(imx_get_mcu_clk);
126 * get peripheral clock 1 ( UART[12], Timer[12], PWM )
128 unsigned int imx_get_perclk1(void)
130 return imx_get_system_clk() / (((PCDR) & 0xf)+1);
132 EXPORT_SYMBOL(imx_get_perclk1);
135 * get peripheral clock 2 ( LCD, SD, SPI[12] )
137 unsigned int imx_get_perclk2(void)
139 return imx_get_system_clk() / (((PCDR>>4) & 0xf)+1);
141 EXPORT_SYMBOL(imx_get_perclk2);
144 * get peripheral clock 3 ( SSI )
146 unsigned int imx_get_perclk3(void)
148 return imx_get_system_clk() / (((PCDR>>16) & 0x7f)+1);
150 EXPORT_SYMBOL(imx_get_perclk3);
153 * get hclk ( SDRAM, CSI, Memory Stick, I2C, DMA )
155 unsigned int imx_get_hclk(void)
157 return imx_get_system_clk() / (((CSCR>>10) & 0xf)+1);
159 EXPORT_SYMBOL(imx_get_hclk);
161 static struct resource imx_mmc_resources[] = {
165 .flags = IORESOURCE_MEM,
170 .flags = IORESOURCE_IRQ,
174 static struct platform_device imx_mmc_device = {
177 .num_resources = ARRAY_SIZE(imx_mmc_resources),
178 .resource = imx_mmc_resources,
181 static struct resource imx_uart1_resources[] = {
185 .flags = IORESOURCE_MEM,
188 .start = (UART1_MINT_RX),
189 .end = (UART1_MINT_RX),
190 .flags = IORESOURCE_IRQ,
193 .start = (UART1_MINT_TX),
194 .end = (UART1_MINT_TX),
195 .flags = IORESOURCE_IRQ,
199 static struct platform_device imx_uart1_device = {
202 .num_resources = ARRAY_SIZE(imx_uart1_resources),
203 .resource = imx_uart1_resources,
206 static struct resource imx_uart2_resources[] = {
210 .flags = IORESOURCE_MEM,
213 .start = (UART2_MINT_RX),
214 .end = (UART2_MINT_RX),
215 .flags = IORESOURCE_IRQ,
218 .start = (UART2_MINT_TX),
219 .end = (UART2_MINT_TX),
220 .flags = IORESOURCE_IRQ,
224 static struct platform_device imx_uart2_device = {
227 .num_resources = ARRAY_SIZE(imx_uart2_resources),
228 .resource = imx_uart2_resources,
231 static struct resource imxfb_resources[] = {
235 .flags = IORESOURCE_MEM,
240 .flags = IORESOURCE_IRQ,
244 static struct platform_device imxfb_device = {
247 .num_resources = ARRAY_SIZE(imxfb_resources),
248 .resource = imxfb_resources,
251 static struct platform_device *devices[] __initdata = {
258 static struct map_desc imx_io_desc[] __initdata = {
259 /* virtual physical length type */
260 {IMX_IO_BASE, IMX_IO_PHYS, IMX_IO_SIZE, MT_DEVICE},
266 iotable_init(imx_io_desc, ARRAY_SIZE(imx_io_desc));
269 static int __init imx_init(void)
271 return platform_add_devices(devices, ARRAY_SIZE(devices));
274 subsys_initcall(imx_init);