arch/arm/mach-w90x900/mfp-w90p910.c

   1 /*
   2  * linux/arch/arm/mach-w90x900/mfp-w90p910.c
   3  *
   4  * Copyright (c) 2008 Nuvoton technology corporation
   5  *
   6  * Wan ZongShun <mcuos.com@gmail.com>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation;version 2 of the License.
  11  */
  12
  13 #include <linux/module.h>
  14 #include <linux/kernel.h>
  15 #include <linux/device.h>
  16 #include <linux/list.h>
  17 #include <linux/errno.h>
  18 #include <linux/err.h>
  19 #include <linux/string.h>
  20 #include <linux/clk.h>
  21 #include <linux/mutex.h>
  22 #include <linux/io.h>
  23
  24 #include <mach/hardware.h>
  25
  26 #define REG_MFSEL       (W90X900_VA_GCR + 0xC)
  27
  28 #define GPSELF          (0x01 << 1)
  29
  30 #define GPSELC          (0x03 << 2)
  31 #define ENKPI           (0x02 << 2)
  32 #define ENNAND          (0x01 << 2)
  33
  34 #define GPSELEI0        (0x01 << 26)
  35 #define GPSELEI1        (0x01 << 27)
  36
  37 static DECLARE_MUTEX(mfp_sem);
  38
  39 void mfp_set_groupf(struct device *dev)
  40 {
  41         unsigned long mfpen;
  42         const char *dev_id;
  43
  44         BUG_ON(!dev);
  45
  46         down(&mfp_sem);
  47
  48         dev_id = dev_name(dev);
  49
  50         mfpen = __raw_readl(REG_MFSEL);
  51
  52         if (strcmp(dev_id, "w90p910-emc") == 0)
  53                 mfpen |= GPSELF;/*enable mac*/
  54         else
  55                 mfpen &= ~GPSELF;/*GPIOF[9:0]*/
  56
  57         __raw_writel(mfpen, REG_MFSEL);
  58
  59         up(&mfp_sem);
  60 }
  61 EXPORT_SYMBOL(mfp_set_groupf);
  62
  63 void mfp_set_groupc(struct device *dev)
  64 {
  65         unsigned long mfpen;
  66         const char *dev_id;
  67
  68         BUG_ON(!dev);
  69
  70         down(&mfp_sem);
  71
  72         dev_id = dev_name(dev);
  73
  74         mfpen = __raw_readl(REG_MFSEL);
  75
  76         if (strcmp(dev_id, "w90p910-lcd") == 0)
  77                 mfpen |= GPSELC;/*enable lcd*/
  78         else if (strcmp(dev_id, "w90p910-kpi") == 0) {
  79                         mfpen &= (~GPSELC);/*enable kpi*/
  80                         mfpen |= ENKPI;
  81                 } else if (strcmp(dev_id, "w90p910-nand") == 0) {
  82                                 mfpen &= (~GPSELC);/*enable nand*/
  83                                 mfpen |= ENNAND;
  84                         } else
  85                                 mfpen &= (~GPSELC);/*GPIOC[14:0]*/
  86
  87         __raw_writel(mfpen, REG_MFSEL);
  88
  89         up(&mfp_sem);
  90 }
  91 EXPORT_SYMBOL(mfp_set_groupc);
  92
  93 void mfp_set_groupi(struct device *dev, int gpio)
  94 {
  95         unsigned long mfpen;
  96         const char *dev_id;
  97
  98         BUG_ON(!dev);
  99
 100         down(&mfp_sem);
 101
 102         dev_id = dev_name(dev);
 103
 104         mfpen = __raw_readl(REG_MFSEL);
 105
 106         if (strcmp(dev_id, "w90p910-wdog") == 0)
 107                 mfpen |= GPSELEI1;/*enable wdog*/
 108                 else if (strcmp(dev_id, "w90p910-atapi") == 0)
 109                         mfpen |= GPSELEI0;/*enable atapi*/
 110
 111         __raw_writel(mfpen, REG_MFSEL);
 112
 113         up(&mfp_sem);
 114 }
 115 EXPORT_SYMBOL(mfp_set_groupi);
 116