arch/arm/mach-w90x900/mfp.c

   1 /*
   2  * linux/arch/arm/mach-w90x900/mfp.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 #define GPIOG0TO1       (0x03 << 14)
  38 #define GPIOG2TO3       (0x03 << 16)
  39 #define ENSPI           (0x0a << 14)
  40 #define ENI2C0          (0x01 << 14)
  41 #define ENI2C1          (0x01 << 16)
  42
  43 static DEFINE_MUTEX(mfp_mutex);
  44
  45 void mfp_set_groupf(struct device *dev)
  46 {
  47         unsigned long mfpen;
  48         const char *dev_id;
  49
  50         BUG_ON(!dev);
  51
  52         mutex_lock(&mfp_mutex);
  53
  54         dev_id = dev_name(dev);
  55
  56         mfpen = __raw_readl(REG_MFSEL);
  57
  58         if (strcmp(dev_id, "nuc900-emc") == 0)
  59                 mfpen |= GPSELF;/*enable mac*/
  60         else
  61                 mfpen &= ~GPSELF;/*GPIOF[9:0]*/
  62
  63         __raw_writel(mfpen, REG_MFSEL);
  64
  65         mutex_unlock(&mfp_mutex);
  66 }
  67 EXPORT_SYMBOL(mfp_set_groupf);
  68
  69 void mfp_set_groupc(struct device *dev)
  70 {
  71         unsigned long mfpen;
  72         const char *dev_id;
  73
  74         BUG_ON(!dev);
  75
  76         mutex_lock(&mfp_mutex);
  77
  78         dev_id = dev_name(dev);
  79
  80         mfpen = __raw_readl(REG_MFSEL);
  81
  82         if (strcmp(dev_id, "nuc900-lcd") == 0)
  83                 mfpen |= GPSELC;/*enable lcd*/
  84         else if (strcmp(dev_id, "nuc900-kpi") == 0) {
  85                 mfpen &= (~GPSELC);/*enable kpi*/
  86                 mfpen |= ENKPI;
  87         } else if (strcmp(dev_id, "nuc900-nand") == 0) {
  88                 mfpen &= (~GPSELC);/*enable nand*/
  89                 mfpen |= ENNAND;
  90         } else
  91                 mfpen &= (~GPSELC);/*GPIOC[14:0]*/
  92
  93         __raw_writel(mfpen, REG_MFSEL);
  94
  95         mutex_unlock(&mfp_mutex);
  96 }
  97 EXPORT_SYMBOL(mfp_set_groupc);
  98
  99 void mfp_set_groupi(struct device *dev)
 100 {
 101         unsigned long mfpen;
 102         const char *dev_id;
 103
 104         BUG_ON(!dev);
 105
 106         mutex_lock(&mfp_mutex);
 107
 108         dev_id = dev_name(dev);
 109
 110         mfpen = __raw_readl(REG_MFSEL);
 111
 112         mfpen &= ~GPSELEI1;/*default gpio16*/
 113
 114         if (strcmp(dev_id, "nuc900-wdog") == 0)
 115                 mfpen |= GPSELEI1;/*enable wdog*/
 116         else if (strcmp(dev_id, "nuc900-atapi") == 0)
 117                 mfpen |= GPSELEI0;/*enable atapi*/
 118         else if (strcmp(dev_id, "nuc900-keypad") == 0)
 119                 mfpen &= ~GPSELEI0;/*enable keypad*/
 120
 121         __raw_writel(mfpen, REG_MFSEL);
 122
 123         mutex_unlock(&mfp_mutex);
 124 }
 125 EXPORT_SYMBOL(mfp_set_groupi);
 126
 127 void mfp_set_groupg(struct device *dev)
 128 {
 129         unsigned long mfpen;
 130         const char *dev_id;
 131
 132         BUG_ON(!dev);
 133
 134         mutex_lock(&mfp_mutex);
 135
 136         dev_id = dev_name(dev);
 137
 138         mfpen = __raw_readl(REG_MFSEL);
 139
 140         if (strcmp(dev_id, "nuc900-spi") == 0) {
 141                 mfpen &= ~(GPIOG0TO1 | GPIOG2TO3);
 142                 mfpen |= ENSPI;/*enable spi*/
 143         } else if (strcmp(dev_id, "nuc900-i2c0") == 0) {
 144                 mfpen &= ~(GPIOG0TO1);
 145                 mfpen |= ENI2C0;/*enable i2c0*/
 146         } else if (strcmp(dev_id, "nuc900-i2c1") == 0) {
 147                 mfpen &= ~(GPIOG2TO3);
 148                 mfpen |= ENI2C1;/*enable i2c1*/
 149         } else {
 150                 mfpen &= ~(GPIOG0TO1 | GPIOG2TO3);/*GPIOG[3:0]*/
 151         }
 152
 153         __raw_writel(mfpen, REG_MFSEL);
 154
 155         mutex_unlock(&mfp_mutex);
 156 }
 157 EXPORT_SYMBOL(mfp_set_groupg);
 158