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 GPIOG22TO23     (0x03 << 22)
  40
  41 #define ENSPI           (0x0a << 14)
  42 #define ENI2C0          (0x01 << 14)
  43 #define ENI2C1          (0x01 << 16)
  44 #define ENAC97          (0x02 << 22)
  45
  46 static DEFINE_MUTEX(mfp_mutex);
  47
  48 void mfp_set_groupf(struct device *dev)
  49 {
  50         unsigned long mfpen;
  51         const char *dev_id;
  52
  53         BUG_ON(!dev);
  54
  55         mutex_lock(&mfp_mutex);
  56
  57         dev_id = dev_name(dev);
  58
  59         mfpen = __raw_readl(REG_MFSEL);
  60
  61         if (strcmp(dev_id, "nuc900-emc") == 0)
  62                 mfpen |= GPSELF;/*enable mac*/
  63         else
  64                 mfpen &= ~GPSELF;/*GPIOF[9:0]*/
  65
  66         __raw_writel(mfpen, REG_MFSEL);
  67
  68         mutex_unlock(&mfp_mutex);
  69 }
  70 EXPORT_SYMBOL(mfp_set_groupf);
  71
  72 void mfp_set_groupc(struct device *dev)
  73 {
  74         unsigned long mfpen;
  75         const char *dev_id;
  76
  77         BUG_ON(!dev);
  78
  79         mutex_lock(&mfp_mutex);
  80
  81         dev_id = dev_name(dev);
  82
  83         mfpen = __raw_readl(REG_MFSEL);
  84
  85         if (strcmp(dev_id, "nuc900-lcd") == 0)
  86                 mfpen |= GPSELC;/*enable lcd*/
  87         else if (strcmp(dev_id, "nuc900-kpi") == 0) {
  88                 mfpen &= (~GPSELC);/*enable kpi*/
  89                 mfpen |= ENKPI;
  90         } else if (strcmp(dev_id, "nuc900-nand") == 0) {
  91                 mfpen &= (~GPSELC);/*enable nand*/
  92                 mfpen |= ENNAND;
  93         } else
  94                 mfpen &= (~GPSELC);/*GPIOC[14:0]*/
  95
  96         __raw_writel(mfpen, REG_MFSEL);
  97
  98         mutex_unlock(&mfp_mutex);
  99 }
 100 EXPORT_SYMBOL(mfp_set_groupc);
 101
 102 void mfp_set_groupi(struct device *dev)
 103 {
 104         unsigned long mfpen;
 105         const char *dev_id;
 106
 107         BUG_ON(!dev);
 108
 109         mutex_lock(&mfp_mutex);
 110
 111         dev_id = dev_name(dev);
 112
 113         mfpen = __raw_readl(REG_MFSEL);
 114
 115         mfpen &= ~GPSELEI1;/*default gpio16*/
 116
 117         if (strcmp(dev_id, "nuc900-wdog") == 0)
 118                 mfpen |= GPSELEI1;/*enable wdog*/
 119         else if (strcmp(dev_id, "nuc900-atapi") == 0)
 120                 mfpen |= GPSELEI0;/*enable atapi*/
 121         else if (strcmp(dev_id, "nuc900-keypad") == 0)
 122                 mfpen &= ~GPSELEI0;/*enable keypad*/
 123
 124         __raw_writel(mfpen, REG_MFSEL);
 125
 126         mutex_unlock(&mfp_mutex);
 127 }
 128 EXPORT_SYMBOL(mfp_set_groupi);
 129
 130 void mfp_set_groupg(struct device *dev)
 131 {
 132         unsigned long mfpen;
 133         const char *dev_id;
 134
 135         BUG_ON(!dev);
 136
 137         mutex_lock(&mfp_mutex);
 138
 139         dev_id = dev_name(dev);
 140
 141         mfpen = __raw_readl(REG_MFSEL);
 142
 143         if (strcmp(dev_id, "nuc900-spi") == 0) {
 144                 mfpen &= ~(GPIOG0TO1 | GPIOG2TO3);
 145                 mfpen |= ENSPI;/*enable spi*/
 146         } else if (strcmp(dev_id, "nuc900-i2c0") == 0) {
 147                 mfpen &= ~(GPIOG0TO1);
 148                 mfpen |= ENI2C0;/*enable i2c0*/
 149         } else if (strcmp(dev_id, "nuc900-i2c1") == 0) {
 150                 mfpen &= ~(GPIOG2TO3);
 151                 mfpen |= ENI2C1;/*enable i2c1*/
 152         } else if (strcmp(dev_id, "nuc900-audio") == 0) {
 153                 mfpen &= ~(GPIOG22TO23);
 154                 mfpen |= ENAC97;/*enable AC97*/
 155         } else {
 156                 mfpen &= ~(GPIOG0TO1 | GPIOG2TO3);/*GPIOG[3:0]*/
 157         }
 158
 159         __raw_writel(mfpen, REG_MFSEL);
 160
 161         mutex_unlock(&mfp_mutex);
 162 }
 163 EXPORT_SYMBOL(mfp_set_groupg);
 164