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 <asm/arch/imxfb.h>
30 #include <asm/hardware.h>
31 #include <asm/arch/imx-regs.h>
33 #include <asm/mach/map.h>
35 void imx_gpio_mode(int gpio_mode)
37 unsigned int pin = gpio_mode & GPIO_PIN_MASK;
38 unsigned int port = (gpio_mode & GPIO_PORT_MASK) >> GPIO_PORT_SHIFT;
39 unsigned int ocr = (gpio_mode & GPIO_OCR_MASK) >> GPIO_OCR_SHIFT;
43 if(gpio_mode & GPIO_PUEN)
44 PUEN(port) |= (1<<pin);
46 PUEN(port) &= ~(1<<pin);
49 if(gpio_mode & GPIO_OUT)
52 DDIR(port) &= ~(1<<pin);
54 /* Primary / alternate function */
55 if(gpio_mode & GPIO_AF)
56 GPR(port) |= (1<<pin);
58 GPR(port) &= ~(1<<pin);
61 if(gpio_mode & GPIO_GIUS)
62 GIUS(port) |= (1<<pin);
64 GIUS(port) &= ~(1<<pin);
66 /* Output / input configuration */
67 /* FIXME: I'm not very sure about OCR and ICONF, someone
68 * should have a look over it
72 tmp &= ~( 3<<(pin*2));
73 tmp |= (ocr << (pin*2));
76 ICONFA1(port) &= ~( 3<<(pin*2));
77 ICONFA1(port) |= ((gpio_mode >> GPIO_AOUT_SHIFT) & 3) << (pin * 2);
78 ICONFB1(port) &= ~( 3<<(pin*2));
79 ICONFB1(port) |= ((gpio_mode >> GPIO_BOUT_SHIFT) & 3) << (pin * 2);
82 tmp &= ~( 3<<((pin-16)*2));
83 tmp |= (ocr << ((pin-16)*2));
86 ICONFA2(port) &= ~( 3<<((pin-16)*2));
87 ICONFA2(port) |= ((gpio_mode >> GPIO_AOUT_SHIFT) & 3) << ((pin-16) * 2);
88 ICONFB2(port) &= ~( 3<<((pin-16)*2));
89 ICONFB2(port) |= ((gpio_mode >> GPIO_BOUT_SHIFT) & 3) << ((pin-16) * 2);
93 EXPORT_SYMBOL(imx_gpio_mode);
96 * get the system pll clock in Hz
98 * mfi + mfn / (mfd +1)
99 * f = 2 * f_ref * --------------------
102 static unsigned int imx_decode_pll(unsigned int pll)
104 u32 mfi = (pll >> 10) & 0xf;
105 u32 mfn = pll & 0x3ff;
106 u32 mfd = (pll >> 16) & 0x3ff;
107 u32 pd = (pll >> 26) & 0xf;
108 u32 f_ref = (CSCR & CSCR_SYSTEM_SEL) ? 16000000 : (CLK32 * 512);
110 mfi = mfi <= 5 ? 5 : mfi;
112 return (2 * (f_ref>>10) * ( (mfi<<10) + (mfn<<10) / (mfd+1) )) / (pd+1);
115 unsigned int imx_get_system_clk(void)
117 return imx_decode_pll(SPCTL0);
119 EXPORT_SYMBOL(imx_get_system_clk);
121 unsigned int imx_get_mcu_clk(void)
123 return imx_decode_pll(MPCTL0);
125 EXPORT_SYMBOL(imx_get_mcu_clk);
128 * get peripheral clock 1 ( UART[12], Timer[12], PWM )
130 unsigned int imx_get_perclk1(void)
132 return imx_get_system_clk() / (((PCDR) & 0xf)+1);
134 EXPORT_SYMBOL(imx_get_perclk1);
137 * get peripheral clock 2 ( LCD, SD, SPI[12] )
139 unsigned int imx_get_perclk2(void)
141 return imx_get_system_clk() / (((PCDR>>4) & 0xf)+1);
143 EXPORT_SYMBOL(imx_get_perclk2);
146 * get peripheral clock 3 ( SSI )
148 unsigned int imx_get_perclk3(void)
150 return imx_get_system_clk() / (((PCDR>>16) & 0x7f)+1);
152 EXPORT_SYMBOL(imx_get_perclk3);
155 * get hclk ( SDRAM, CSI, Memory Stick, I2C, DMA )
157 unsigned int imx_get_hclk(void)
159 return imx_get_system_clk() / (((CSCR>>10) & 0xf)+1);
161 EXPORT_SYMBOL(imx_get_hclk);
163 static struct resource imx_mmc_resources[] = {
167 .flags = IORESOURCE_MEM,
172 .flags = IORESOURCE_IRQ,
176 static struct platform_device imx_mmc_device = {
179 .num_resources = ARRAY_SIZE(imx_mmc_resources),
180 .resource = imx_mmc_resources,
183 static struct resource imx_uart1_resources[] = {
187 .flags = IORESOURCE_MEM,
190 .start = (UART1_MINT_RX),
191 .end = (UART1_MINT_RX),
192 .flags = IORESOURCE_IRQ,
195 .start = (UART1_MINT_TX),
196 .end = (UART1_MINT_TX),
197 .flags = IORESOURCE_IRQ,
201 static struct platform_device imx_uart1_device = {
204 .num_resources = ARRAY_SIZE(imx_uart1_resources),
205 .resource = imx_uart1_resources,
208 static struct resource imx_uart2_resources[] = {
212 .flags = IORESOURCE_MEM,
215 .start = (UART2_MINT_RX),
216 .end = (UART2_MINT_RX),
217 .flags = IORESOURCE_IRQ,
220 .start = (UART2_MINT_TX),
221 .end = (UART2_MINT_TX),
222 .flags = IORESOURCE_IRQ,
226 static struct platform_device imx_uart2_device = {
229 .num_resources = ARRAY_SIZE(imx_uart2_resources),
230 .resource = imx_uart2_resources,
233 static struct imxfb_mach_info imx_fb_info;
235 void __init set_imx_fb_info(struct imxfb_mach_info *hard_imx_fb_info)
237 memcpy(&imx_fb_info,hard_imx_fb_info,sizeof(struct imxfb_mach_info));
239 EXPORT_SYMBOL(set_imx_fb_info);
241 static struct resource imxfb_resources[] = {
245 .flags = IORESOURCE_MEM,
250 .flags = IORESOURCE_IRQ,
254 static u64 fb_dma_mask = ~(u64)0;
256 static struct platform_device imxfb_device = {
260 .platform_data = &imx_fb_info,
261 .dma_mask = &fb_dma_mask,
262 .coherent_dma_mask = 0xffffffff,
264 .num_resources = ARRAY_SIZE(imxfb_resources),
265 .resource = imxfb_resources,
268 static struct platform_device *devices[] __initdata = {
275 static struct map_desc imx_io_desc[] __initdata = {
277 .virtual = IMX_IO_BASE,
278 .pfn = __phys_to_pfn(IMX_IO_PHYS),
279 .length = IMX_IO_SIZE,
287 iotable_init(imx_io_desc, ARRAY_SIZE(imx_io_desc));
290 static int __init imx_init(void)
292 return platform_add_devices(devices, ARRAY_SIZE(devices));
295 subsys_initcall(imx_init);