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384 lines
8.5 KiB
384 lines
8.5 KiB
/*
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* arch/arm/mach-imx/generic.c
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*
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* author: Sascha Hauer
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* Created: april 20th, 2004
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* Copyright: Synertronixx GmbH
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*
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* Common code for i.MX machines
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <linux/platform_device.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/string.h>
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#include <asm/errno.h>
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#include <asm/arch/imxfb.h>
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#include <asm/hardware.h>
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#include <asm/arch/imx-regs.h>
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#include <asm/mach/map.h>
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#include <asm/arch/mmc.h>
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#include <asm/arch/gpio.h>
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unsigned long imx_gpio_alloc_map[(GPIO_PORT_MAX + 1) * 32 / BITS_PER_LONG];
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void imx_gpio_mode(int gpio_mode)
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{
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unsigned int pin = gpio_mode & GPIO_PIN_MASK;
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unsigned int port = (gpio_mode & GPIO_PORT_MASK) >> GPIO_PORT_SHIFT;
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unsigned int ocr = (gpio_mode & GPIO_OCR_MASK) >> GPIO_OCR_SHIFT;
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unsigned int tmp;
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/* Pullup enable */
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if(gpio_mode & GPIO_PUEN)
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PUEN(port) |= (1<<pin);
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else
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PUEN(port) &= ~(1<<pin);
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/* Data direction */
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if(gpio_mode & GPIO_OUT)
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DDIR(port) |= 1<<pin;
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else
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DDIR(port) &= ~(1<<pin);
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/* Primary / alternate function */
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if(gpio_mode & GPIO_AF)
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GPR(port) |= (1<<pin);
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else
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GPR(port) &= ~(1<<pin);
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/* use as gpio? */
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if(gpio_mode & GPIO_GIUS)
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GIUS(port) |= (1<<pin);
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else
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GIUS(port) &= ~(1<<pin);
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/* Output / input configuration */
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/* FIXME: I'm not very sure about OCR and ICONF, someone
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* should have a look over it
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*/
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if(pin<16) {
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tmp = OCR1(port);
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tmp &= ~( 3<<(pin*2));
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tmp |= (ocr << (pin*2));
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OCR1(port) = tmp;
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ICONFA1(port) &= ~( 3<<(pin*2));
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ICONFA1(port) |= ((gpio_mode >> GPIO_AOUT_SHIFT) & 3) << (pin * 2);
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ICONFB1(port) &= ~( 3<<(pin*2));
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ICONFB1(port) |= ((gpio_mode >> GPIO_BOUT_SHIFT) & 3) << (pin * 2);
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} else {
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tmp = OCR2(port);
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tmp &= ~( 3<<((pin-16)*2));
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tmp |= (ocr << ((pin-16)*2));
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OCR2(port) = tmp;
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ICONFA2(port) &= ~( 3<<((pin-16)*2));
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ICONFA2(port) |= ((gpio_mode >> GPIO_AOUT_SHIFT) & 3) << ((pin-16) * 2);
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ICONFB2(port) &= ~( 3<<((pin-16)*2));
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ICONFB2(port) |= ((gpio_mode >> GPIO_BOUT_SHIFT) & 3) << ((pin-16) * 2);
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}
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}
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EXPORT_SYMBOL(imx_gpio_mode);
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int imx_gpio_request(unsigned gpio, const char *label)
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{
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if(gpio >= (GPIO_PORT_MAX + 1) * 32) {
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printk(KERN_ERR "imx_gpio: Attempt to request nonexistent GPIO %d for \"%s\"\n",
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gpio, label ? label : "?");
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return -EINVAL;
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}
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if(test_and_set_bit(gpio, imx_gpio_alloc_map)) {
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printk(KERN_ERR "imx_gpio: GPIO %d already used. Allocation for \"%s\" failed\n",
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gpio, label ? label : "?");
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return -EBUSY;
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}
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return 0;
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}
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EXPORT_SYMBOL(imx_gpio_request);
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void imx_gpio_free(unsigned gpio)
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{
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if(gpio >= (GPIO_PORT_MAX + 1) * 32)
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return;
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clear_bit(gpio, imx_gpio_alloc_map);
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}
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EXPORT_SYMBOL(imx_gpio_free);
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int imx_gpio_direction_input(unsigned gpio)
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{
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imx_gpio_mode(gpio | GPIO_IN | GPIO_GIUS | GPIO_DR);
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return 0;
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}
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EXPORT_SYMBOL(imx_gpio_direction_input);
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int imx_gpio_direction_output(unsigned gpio, int value)
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{
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imx_gpio_set_value(gpio, value);
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imx_gpio_mode(gpio | GPIO_OUT | GPIO_GIUS | GPIO_DR);
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return 0;
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}
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EXPORT_SYMBOL(imx_gpio_direction_output);
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int imx_gpio_setup_multiple_pins(const int *pin_list, unsigned count,
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int alloc_mode, const char *label)
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{
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const int *p = pin_list;
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int i;
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unsigned gpio;
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unsigned mode;
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for (i = 0; i < count; i++) {
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gpio = *p & (GPIO_PIN_MASK | GPIO_PORT_MASK);
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mode = *p & ~(GPIO_PIN_MASK | GPIO_PORT_MASK);
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if (gpio >= (GPIO_PORT_MAX + 1) * 32)
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goto setup_error;
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if (alloc_mode & IMX_GPIO_ALLOC_MODE_RELEASE)
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imx_gpio_free(gpio);
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else if (!(alloc_mode & IMX_GPIO_ALLOC_MODE_NO_ALLOC))
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if (imx_gpio_request(gpio, label))
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if (!(alloc_mode & IMX_GPIO_ALLOC_MODE_TRY_ALLOC))
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goto setup_error;
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if (!(alloc_mode & (IMX_GPIO_ALLOC_MODE_ALLOC_ONLY |
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IMX_GPIO_ALLOC_MODE_RELEASE)))
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imx_gpio_mode(gpio | mode);
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p++;
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}
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return 0;
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setup_error:
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if(alloc_mode & (IMX_GPIO_ALLOC_MODE_NO_ALLOC |
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IMX_GPIO_ALLOC_MODE_TRY_ALLOC))
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return -EINVAL;
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while (p != pin_list) {
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p--;
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gpio = *p & (GPIO_PIN_MASK | GPIO_PORT_MASK);
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imx_gpio_free(gpio);
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}
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return -EINVAL;
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}
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EXPORT_SYMBOL(imx_gpio_setup_multiple_pins);
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void __imx_gpio_set_value(unsigned gpio, int value)
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{
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imx_gpio_set_value_inline(gpio, value);
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}
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EXPORT_SYMBOL(__imx_gpio_set_value);
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int imx_gpio_to_irq(unsigned gpio)
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{
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return IRQ_GPIOA(0) + gpio;
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}
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EXPORT_SYMBOL(imx_gpio_to_irq);
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int imx_irq_to_gpio(unsigned irq)
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{
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if (irq < IRQ_GPIOA(0))
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return -EINVAL;
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return irq - IRQ_GPIOA(0);
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}
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EXPORT_SYMBOL(imx_irq_to_gpio);
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/*
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* get the system pll clock in Hz
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*
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* mfi + mfn / (mfd +1)
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* f = 2 * f_ref * --------------------
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* pd + 1
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*/
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static unsigned int imx_decode_pll(unsigned int pll, u32 f_ref)
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{
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unsigned long long ll;
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unsigned long quot;
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u32 mfi = (pll >> 10) & 0xf;
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u32 mfn = pll & 0x3ff;
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u32 mfd = (pll >> 16) & 0x3ff;
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u32 pd = (pll >> 26) & 0xf;
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mfi = mfi <= 5 ? 5 : mfi;
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ll = 2 * (unsigned long long)f_ref * ( (mfi<<16) + (mfn<<16) / (mfd+1) );
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quot = (pd+1) * (1<<16);
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ll += quot / 2;
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do_div(ll, quot);
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return (unsigned int) ll;
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}
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unsigned int imx_get_system_clk(void)
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{
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u32 f_ref = (CSCR & CSCR_SYSTEM_SEL) ? 16000000 : (CLK32 * 512);
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return imx_decode_pll(SPCTL0, f_ref);
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}
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EXPORT_SYMBOL(imx_get_system_clk);
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unsigned int imx_get_mcu_clk(void)
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{
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return imx_decode_pll(MPCTL0, CLK32 * 512);
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}
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EXPORT_SYMBOL(imx_get_mcu_clk);
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/*
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* get peripheral clock 1 ( UART[12], Timer[12], PWM )
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*/
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unsigned int imx_get_perclk1(void)
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{
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return imx_get_system_clk() / (((PCDR) & 0xf)+1);
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}
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EXPORT_SYMBOL(imx_get_perclk1);
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/*
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* get peripheral clock 2 ( LCD, SD, SPI[12] )
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*/
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unsigned int imx_get_perclk2(void)
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{
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return imx_get_system_clk() / (((PCDR>>4) & 0xf)+1);
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}
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EXPORT_SYMBOL(imx_get_perclk2);
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/*
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* get peripheral clock 3 ( SSI )
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*/
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unsigned int imx_get_perclk3(void)
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{
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return imx_get_system_clk() / (((PCDR>>16) & 0x7f)+1);
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}
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EXPORT_SYMBOL(imx_get_perclk3);
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/*
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* get hclk ( SDRAM, CSI, Memory Stick, I2C, DMA )
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*/
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unsigned int imx_get_hclk(void)
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{
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return imx_get_system_clk() / (((CSCR>>10) & 0xf)+1);
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}
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EXPORT_SYMBOL(imx_get_hclk);
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static struct resource imx_mmc_resources[] = {
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[0] = {
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.start = 0x00214000,
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.end = 0x002140FF,
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.flags = IORESOURCE_MEM,
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},
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[1] = {
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.start = (SDHC_INT),
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.end = (SDHC_INT),
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.flags = IORESOURCE_IRQ,
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},
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};
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static u64 imxmmmc_dmamask = 0xffffffffUL;
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static struct platform_device imx_mmc_device = {
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.name = "imx-mmc",
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.id = 0,
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.dev = {
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.dma_mask = &imxmmmc_dmamask,
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.coherent_dma_mask = 0xffffffff,
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},
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.num_resources = ARRAY_SIZE(imx_mmc_resources),
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.resource = imx_mmc_resources,
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};
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void __init imx_set_mmc_info(struct imxmmc_platform_data *info)
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{
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imx_mmc_device.dev.platform_data = info;
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}
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static struct imxfb_mach_info imx_fb_info;
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void __init set_imx_fb_info(struct imxfb_mach_info *hard_imx_fb_info)
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{
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memcpy(&imx_fb_info,hard_imx_fb_info,sizeof(struct imxfb_mach_info));
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}
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EXPORT_SYMBOL(set_imx_fb_info);
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static struct resource imxfb_resources[] = {
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[0] = {
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.start = 0x00205000,
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.end = 0x002050FF,
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.flags = IORESOURCE_MEM,
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},
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[1] = {
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.start = LCDC_INT,
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.end = LCDC_INT,
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.flags = IORESOURCE_IRQ,
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},
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};
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static u64 fb_dma_mask = ~(u64)0;
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static struct platform_device imxfb_device = {
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.name = "imx-fb",
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.id = 0,
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.dev = {
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.platform_data = &imx_fb_info,
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.dma_mask = &fb_dma_mask,
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.coherent_dma_mask = 0xffffffff,
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},
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.num_resources = ARRAY_SIZE(imxfb_resources),
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.resource = imxfb_resources,
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};
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static struct platform_device *devices[] __initdata = {
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&imx_mmc_device,
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&imxfb_device,
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};
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static struct map_desc imx_io_desc[] __initdata = {
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{
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.virtual = IMX_IO_BASE,
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.pfn = __phys_to_pfn(IMX_IO_PHYS),
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.length = IMX_IO_SIZE,
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.type = MT_DEVICE
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}
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};
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void __init
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imx_map_io(void)
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{
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iotable_init(imx_io_desc, ARRAY_SIZE(imx_io_desc));
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}
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static int __init imx_init(void)
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{
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return platform_add_devices(devices, ARRAY_SIZE(devices));
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}
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subsys_initcall(imx_init);
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