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>
37 void imx_gpio_mode(int gpio_mode)
39 unsigned int pin = gpio_mode & GPIO_PIN_MASK;
40 unsigned int port = (gpio_mode & GPIO_PORT_MASK) >> GPIO_PORT_SHIFT;
41 unsigned int ocr = (gpio_mode & GPIO_OCR_MASK) >> GPIO_OCR_SHIFT;
45 if(gpio_mode & GPIO_PUEN)
46 PUEN(port) |= (1<<pin);
48 PUEN(port) &= ~(1<<pin);
51 if(gpio_mode & GPIO_OUT)
54 DDIR(port) &= ~(1<<pin);
56 /* Primary / alternate function */
57 if(gpio_mode & GPIO_AF)
58 GPR(port) |= (1<<pin);
60 GPR(port) &= ~(1<<pin);
63 if(gpio_mode & GPIO_GIUS)
64 GIUS(port) |= (1<<pin);
66 GIUS(port) &= ~(1<<pin);
68 /* Output / input configuration */
69 /* FIXME: I'm not very sure about OCR and ICONF, someone
70 * should have a look over it
74 tmp &= ~( 3<<(pin*2));
75 tmp |= (ocr << (pin*2));
78 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);
84 tmp &= ~( 3<<((pin-16)*2));
85 tmp |= (ocr << ((pin-16)*2));
88 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);
95 EXPORT_SYMBOL(imx_gpio_mode);
98 * get the system pll clock in Hz
100 * mfi + mfn / (mfd +1)
101 * f = 2 * f_ref * --------------------
104 static unsigned int imx_decode_pll(unsigned int pll)
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);
112 mfi = mfi <= 5 ? 5 : mfi;
114 return (2 * (f_ref>>10) * ( (mfi<<10) + (mfn<<10) / (mfd+1) )) / (pd+1);
117 unsigned int imx_get_system_clk(void)
119 return imx_decode_pll(SPCTL0);
121 EXPORT_SYMBOL(imx_get_system_clk);
123 unsigned int imx_get_mcu_clk(void)
125 return imx_decode_pll(MPCTL0);
127 EXPORT_SYMBOL(imx_get_mcu_clk);
130 * get peripheral clock 1 ( UART[12], Timer[12], PWM )
132 unsigned int imx_get_perclk1(void)
134 return imx_get_system_clk() / (((PCDR) & 0xf)+1);
136 EXPORT_SYMBOL(imx_get_perclk1);
139 * get peripheral clock 2 ( LCD, SD, SPI[12] )
141 unsigned int imx_get_perclk2(void)
143 return imx_get_system_clk() / (((PCDR>>4) & 0xf)+1);
145 EXPORT_SYMBOL(imx_get_perclk2);
148 * get peripheral clock 3 ( SSI )
150 unsigned int imx_get_perclk3(void)
152 return imx_get_system_clk() / (((PCDR>>16) & 0x7f)+1);
154 EXPORT_SYMBOL(imx_get_perclk3);
157 * get hclk ( SDRAM, CSI, Memory Stick, I2C, DMA )
159 unsigned int imx_get_hclk(void)
161 return imx_get_system_clk() / (((CSCR>>10) & 0xf)+1);
163 EXPORT_SYMBOL(imx_get_hclk);
165 static struct resource imx_mmc_resources[] = {
169 .flags = IORESOURCE_MEM,
174 .flags = IORESOURCE_IRQ,
178 static struct platform_device imx_mmc_device = {
181 .num_resources = ARRAY_SIZE(imx_mmc_resources),
182 .resource = imx_mmc_resources,
185 static struct resource imx_uart1_resources[] = {
189 .flags = IORESOURCE_MEM,
192 .start = (UART1_MINT_RX),
193 .end = (UART1_MINT_RX),
194 .flags = IORESOURCE_IRQ,
197 .start = (UART1_MINT_TX),
198 .end = (UART1_MINT_TX),
199 .flags = IORESOURCE_IRQ,
203 static struct platform_device imx_uart1_device = {
206 .num_resources = ARRAY_SIZE(imx_uart1_resources),
207 .resource = imx_uart1_resources,
210 static struct resource imx_uart2_resources[] = {
214 .flags = IORESOURCE_MEM,
217 .start = (UART2_MINT_RX),
218 .end = (UART2_MINT_RX),
219 .flags = IORESOURCE_IRQ,
222 .start = (UART2_MINT_TX),
223 .end = (UART2_MINT_TX),
224 .flags = IORESOURCE_IRQ,
228 static struct platform_device imx_uart2_device = {
231 .num_resources = ARRAY_SIZE(imx_uart2_resources),
232 .resource = imx_uart2_resources,
235 static struct imxfb_mach_info imx_fb_info;
237 void __init set_imx_fb_info(struct imxfb_mach_info *hard_imx_fb_info)
239 memcpy(&imx_fb_info,hard_imx_fb_info,sizeof(struct imxfb_mach_info));
241 EXPORT_SYMBOL(set_imx_fb_info);
243 static struct resource imxfb_resources[] = {
247 .flags = IORESOURCE_MEM,
252 .flags = IORESOURCE_IRQ,
256 static u64 fb_dma_mask = ~(u64)0;
258 static struct platform_device imxfb_device = {
262 .platform_data = &imx_fb_info,
263 .dma_mask = &fb_dma_mask,
264 .coherent_dma_mask = 0xffffffff,
266 .num_resources = ARRAY_SIZE(imxfb_resources),
267 .resource = imxfb_resources,
270 static struct platform_device *devices[] __initdata = {
277 static struct map_desc imx_io_desc[] __initdata = {
279 .virtual = IMX_IO_BASE,
280 .pfn = __phys_to_pfn(IMX_IO_PHYS),
281 .length = IMX_IO_SIZE,
289 iotable_init(imx_io_desc, ARRAY_SIZE(imx_io_desc));
292 static int __init imx_init(void)
294 return platform_add_devices(devices, ARRAY_SIZE(devices));
297 subsys_initcall(imx_init);