27eb97582d
Add multi-function pin api for w90p910 platform. Signed-off-by: Wan ZongShun <mcuos.com@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
116 lines
2.2 KiB
C
116 lines
2.2 KiB
C
/*
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* linux/arch/arm/mach-w90x900/mfp-w90p910.c
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*
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* Copyright (c) 2008 Nuvoton technology corporation
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*
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* Wan ZongShun <mcuos.com@gmail.com>
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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;version 2 of the License.
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/device.h>
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#include <linux/list.h>
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#include <linux/errno.h>
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#include <linux/err.h>
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#include <linux/string.h>
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#include <linux/clk.h>
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#include <linux/mutex.h>
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#include <linux/io.h>
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#include <mach/hardware.h>
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#define REG_MFSEL (W90X900_VA_GCR + 0xC)
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#define GPSELF (0x01 << 1)
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#define GPSELC (0x03 << 2)
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#define ENKPI (0x02 << 2)
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#define ENNAND (0x01 << 2)
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#define GPSELEI0 (0x01 << 26)
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#define GPSELEI1 (0x01 << 27)
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static DECLARE_MUTEX(mfp_sem);
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void mfp_set_groupf(struct device *dev)
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{
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unsigned long mfpen;
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const char *dev_id;
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BUG_ON(!dev);
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down(&mfp_sem);
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dev_id = dev_name(dev);
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mfpen = __raw_readl(REG_MFSEL);
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if (strcmp(dev_id, "w90p910-emc") == 0)
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mfpen |= GPSELF;/*enable mac*/
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else
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mfpen &= ~GPSELF;/*GPIOF[9:0]*/
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__raw_writel(mfpen, REG_MFSEL);
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up(&mfp_sem);
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}
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EXPORT_SYMBOL(mfp_set_groupf);
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void mfp_set_groupc(struct device *dev)
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{
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unsigned long mfpen;
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const char *dev_id;
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BUG_ON(!dev);
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down(&mfp_sem);
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dev_id = dev_name(dev);
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mfpen = __raw_readl(REG_MFSEL);
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if (strcmp(dev_id, "w90p910-lcd") == 0)
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mfpen |= GPSELC;/*enable lcd*/
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else if (strcmp(dev_id, "w90p910-kpi") == 0) {
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mfpen &= (~GPSELC);/*enable kpi*/
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mfpen |= ENKPI;
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} else if (strcmp(dev_id, "w90p910-nand") == 0) {
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mfpen &= (~GPSELC);/*enable nand*/
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mfpen |= ENNAND;
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} else
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mfpen &= (~GPSELC);/*GPIOC[14:0]*/
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__raw_writel(mfpen, REG_MFSEL);
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up(&mfp_sem);
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}
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EXPORT_SYMBOL(mfp_set_groupc);
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void mfp_set_groupi(struct device *dev, int gpio)
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{
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unsigned long mfpen;
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const char *dev_id;
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BUG_ON(!dev);
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down(&mfp_sem);
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dev_id = dev_name(dev);
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mfpen = __raw_readl(REG_MFSEL);
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if (strcmp(dev_id, "w90p910-wdog") == 0)
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mfpen |= GPSELEI1;/*enable wdog*/
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else if (strcmp(dev_id, "w90p910-atapi") == 0)
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mfpen |= GPSELEI0;/*enable atapi*/
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__raw_writel(mfpen, REG_MFSEL);
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up(&mfp_sem);
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}
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EXPORT_SYMBOL(mfp_set_groupi);
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