forked from Minki/linux
0a5b0aa8a3
Patch from Sascha Hauer Current implementation of imx_gpio_mode does not allow to configure all alternate routing possibilities of the i.MX. With this patch every bit in the gpio setup registers has a corresponding bit in the gpio_mode parameter, so every routing should be possible now. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
292 lines
6.5 KiB
C
292 lines
6.5 KiB
C
/*
|
|
* arch/arm/mach-imx/generic.c
|
|
*
|
|
* author: Sascha Hauer
|
|
* Created: april 20th, 2004
|
|
* Copyright: Synertronixx GmbH
|
|
*
|
|
* Common code for i.MX machines
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*
|
|
*/
|
|
#include <linux/device.h>
|
|
#include <linux/init.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <asm/arch/imxfb.h>
|
|
#include <asm/hardware.h>
|
|
#include <asm/arch/imx-regs.h>
|
|
|
|
#include <asm/mach/map.h>
|
|
|
|
void imx_gpio_mode(int gpio_mode)
|
|
{
|
|
unsigned int pin = gpio_mode & GPIO_PIN_MASK;
|
|
unsigned int port = (gpio_mode & GPIO_PORT_MASK) >> GPIO_PORT_SHIFT;
|
|
unsigned int ocr = (gpio_mode & GPIO_OCR_MASK) >> GPIO_OCR_SHIFT;
|
|
unsigned int tmp;
|
|
|
|
/* Pullup enable */
|
|
if(gpio_mode & GPIO_PUEN)
|
|
PUEN(port) |= (1<<pin);
|
|
else
|
|
PUEN(port) &= ~(1<<pin);
|
|
|
|
/* Data direction */
|
|
if(gpio_mode & GPIO_OUT)
|
|
DDIR(port) |= 1<<pin;
|
|
else
|
|
DDIR(port) &= ~(1<<pin);
|
|
|
|
/* Primary / alternate function */
|
|
if(gpio_mode & GPIO_AF)
|
|
GPR(port) |= (1<<pin);
|
|
else
|
|
GPR(port) &= ~(1<<pin);
|
|
|
|
/* use as gpio? */
|
|
if(gpio_mode & GPIO_GIUS)
|
|
GIUS(port) |= (1<<pin);
|
|
else
|
|
GIUS(port) &= ~(1<<pin);
|
|
|
|
/* Output / input configuration */
|
|
/* FIXME: I'm not very sure about OCR and ICONF, someone
|
|
* should have a look over it
|
|
*/
|
|
if(pin<16) {
|
|
tmp = OCR1(port);
|
|
tmp &= ~( 3<<(pin*2));
|
|
tmp |= (ocr << (pin*2));
|
|
OCR1(port) = tmp;
|
|
|
|
ICONFA1(port) &= ~( 3<<(pin*2));
|
|
ICONFA1(port) |= ((gpio_mode >> GPIO_AOUT_SHIFT) & 3) << (pin * 2);
|
|
ICONFB1(port) &= ~( 3<<(pin*2));
|
|
ICONFB1(port) |= ((gpio_mode >> GPIO_BOUT_SHIFT) & 3) << (pin * 2);
|
|
} else {
|
|
tmp = OCR2(port);
|
|
tmp &= ~( 3<<((pin-16)*2));
|
|
tmp |= (ocr << ((pin-16)*2));
|
|
OCR2(port) = tmp;
|
|
|
|
ICONFA2(port) &= ~( 3<<((pin-16)*2));
|
|
ICONFA2(port) |= ((gpio_mode >> GPIO_AOUT_SHIFT) & 3) << ((pin-16) * 2);
|
|
ICONFB2(port) &= ~( 3<<((pin-16)*2));
|
|
ICONFB2(port) |= ((gpio_mode >> GPIO_BOUT_SHIFT) & 3) << ((pin-16) * 2);
|
|
}
|
|
}
|
|
|
|
EXPORT_SYMBOL(imx_gpio_mode);
|
|
|
|
/*
|
|
* get the system pll clock in Hz
|
|
*
|
|
* mfi + mfn / (mfd +1)
|
|
* f = 2 * f_ref * --------------------
|
|
* pd + 1
|
|
*/
|
|
static unsigned int imx_decode_pll(unsigned int pll)
|
|
{
|
|
u32 mfi = (pll >> 10) & 0xf;
|
|
u32 mfn = pll & 0x3ff;
|
|
u32 mfd = (pll >> 16) & 0x3ff;
|
|
u32 pd = (pll >> 26) & 0xf;
|
|
u32 f_ref = (CSCR & CSCR_SYSTEM_SEL) ? 16000000 : (CLK32 * 512);
|
|
|
|
mfi = mfi <= 5 ? 5 : mfi;
|
|
|
|
return (2 * (f_ref>>10) * ( (mfi<<10) + (mfn<<10) / (mfd+1) )) / (pd+1);
|
|
}
|
|
|
|
unsigned int imx_get_system_clk(void)
|
|
{
|
|
return imx_decode_pll(SPCTL0);
|
|
}
|
|
EXPORT_SYMBOL(imx_get_system_clk);
|
|
|
|
unsigned int imx_get_mcu_clk(void)
|
|
{
|
|
return imx_decode_pll(MPCTL0);
|
|
}
|
|
EXPORT_SYMBOL(imx_get_mcu_clk);
|
|
|
|
/*
|
|
* get peripheral clock 1 ( UART[12], Timer[12], PWM )
|
|
*/
|
|
unsigned int imx_get_perclk1(void)
|
|
{
|
|
return imx_get_system_clk() / (((PCDR) & 0xf)+1);
|
|
}
|
|
EXPORT_SYMBOL(imx_get_perclk1);
|
|
|
|
/*
|
|
* get peripheral clock 2 ( LCD, SD, SPI[12] )
|
|
*/
|
|
unsigned int imx_get_perclk2(void)
|
|
{
|
|
return imx_get_system_clk() / (((PCDR>>4) & 0xf)+1);
|
|
}
|
|
EXPORT_SYMBOL(imx_get_perclk2);
|
|
|
|
/*
|
|
* get peripheral clock 3 ( SSI )
|
|
*/
|
|
unsigned int imx_get_perclk3(void)
|
|
{
|
|
return imx_get_system_clk() / (((PCDR>>16) & 0x7f)+1);
|
|
}
|
|
EXPORT_SYMBOL(imx_get_perclk3);
|
|
|
|
/*
|
|
* get hclk ( SDRAM, CSI, Memory Stick, I2C, DMA )
|
|
*/
|
|
unsigned int imx_get_hclk(void)
|
|
{
|
|
return imx_get_system_clk() / (((CSCR>>10) & 0xf)+1);
|
|
}
|
|
EXPORT_SYMBOL(imx_get_hclk);
|
|
|
|
static struct resource imx_mmc_resources[] = {
|
|
[0] = {
|
|
.start = 0x00214000,
|
|
.end = 0x002140FF,
|
|
.flags = IORESOURCE_MEM,
|
|
},
|
|
[1] = {
|
|
.start = (SDHC_INT),
|
|
.end = (SDHC_INT),
|
|
.flags = IORESOURCE_IRQ,
|
|
},
|
|
};
|
|
|
|
static struct platform_device imx_mmc_device = {
|
|
.name = "imx-mmc",
|
|
.id = 0,
|
|
.num_resources = ARRAY_SIZE(imx_mmc_resources),
|
|
.resource = imx_mmc_resources,
|
|
};
|
|
|
|
static struct resource imx_uart1_resources[] = {
|
|
[0] = {
|
|
.start = 0x00206000,
|
|
.end = 0x002060FF,
|
|
.flags = IORESOURCE_MEM,
|
|
},
|
|
[1] = {
|
|
.start = (UART1_MINT_RX),
|
|
.end = (UART1_MINT_RX),
|
|
.flags = IORESOURCE_IRQ,
|
|
},
|
|
[2] = {
|
|
.start = (UART1_MINT_TX),
|
|
.end = (UART1_MINT_TX),
|
|
.flags = IORESOURCE_IRQ,
|
|
},
|
|
};
|
|
|
|
static struct platform_device imx_uart1_device = {
|
|
.name = "imx-uart",
|
|
.id = 0,
|
|
.num_resources = ARRAY_SIZE(imx_uart1_resources),
|
|
.resource = imx_uart1_resources,
|
|
};
|
|
|
|
static struct resource imx_uart2_resources[] = {
|
|
[0] = {
|
|
.start = 0x00207000,
|
|
.end = 0x002070FF,
|
|
.flags = IORESOURCE_MEM,
|
|
},
|
|
[1] = {
|
|
.start = (UART2_MINT_RX),
|
|
.end = (UART2_MINT_RX),
|
|
.flags = IORESOURCE_IRQ,
|
|
},
|
|
[2] = {
|
|
.start = (UART2_MINT_TX),
|
|
.end = (UART2_MINT_TX),
|
|
.flags = IORESOURCE_IRQ,
|
|
},
|
|
};
|
|
|
|
static struct platform_device imx_uart2_device = {
|
|
.name = "imx-uart",
|
|
.id = 1,
|
|
.num_resources = ARRAY_SIZE(imx_uart2_resources),
|
|
.resource = imx_uart2_resources,
|
|
};
|
|
|
|
static struct imxfb_mach_info imx_fb_info;
|
|
|
|
void __init set_imx_fb_info(struct imxfb_mach_info *hard_imx_fb_info)
|
|
{
|
|
memcpy(&imx_fb_info,hard_imx_fb_info,sizeof(struct imxfb_mach_info));
|
|
}
|
|
EXPORT_SYMBOL(set_imx_fb_info);
|
|
|
|
static struct resource imxfb_resources[] = {
|
|
[0] = {
|
|
.start = 0x00205000,
|
|
.end = 0x002050FF,
|
|
.flags = IORESOURCE_MEM,
|
|
},
|
|
[1] = {
|
|
.start = LCDC_INT,
|
|
.end = LCDC_INT,
|
|
.flags = IORESOURCE_IRQ,
|
|
},
|
|
};
|
|
|
|
static u64 fb_dma_mask = ~(u64)0;
|
|
|
|
static struct platform_device imxfb_device = {
|
|
.name = "imx-fb",
|
|
.id = 0,
|
|
.dev = {
|
|
.platform_data = &imx_fb_info,
|
|
.dma_mask = &fb_dma_mask,
|
|
.coherent_dma_mask = 0xffffffff,
|
|
},
|
|
.num_resources = ARRAY_SIZE(imxfb_resources),
|
|
.resource = imxfb_resources,
|
|
};
|
|
|
|
static struct platform_device *devices[] __initdata = {
|
|
&imx_mmc_device,
|
|
&imxfb_device,
|
|
&imx_uart1_device,
|
|
&imx_uart2_device,
|
|
};
|
|
|
|
static struct map_desc imx_io_desc[] __initdata = {
|
|
/* virtual physical length type */
|
|
{IMX_IO_BASE, IMX_IO_PHYS, IMX_IO_SIZE, MT_DEVICE},
|
|
};
|
|
|
|
void __init
|
|
imx_map_io(void)
|
|
{
|
|
iotable_init(imx_io_desc, ARRAY_SIZE(imx_io_desc));
|
|
}
|
|
|
|
static int __init imx_init(void)
|
|
{
|
|
return platform_add_devices(devices, ARRAY_SIZE(devices));
|
|
}
|
|
|
|
subsys_initcall(imx_init);
|