arch/arm/mach-s5pc100/setup-ide.c

   1 /* linux/arch/arm/mach-s5pc100/setup-ide.c
   2  *
   3  * Copyright (c) 2010 Samsung Electronics Co., Ltd.
   4  *              http://www.samsung.com
   5  *
   6  * S5PC100 setup information for IDE
   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 version 2 as
  10  * published by the Free Software Foundation.
  11 */
  12
  13 #include <linux/kernel.h>
  14 #include <linux/gpio.h>
  15 #include <linux/io.h>
  16
  17 #include <mach/regs-clock.h>
  18 #include <plat/gpio-cfg.h>
  19
  20 static void s5pc100_ide_cfg_gpios(unsigned int base, unsigned int nr)
  21 {
  22         s3c_gpio_cfgrange_nopull(base, nr, S3C_GPIO_SFN(4));
  23
  24         for (; nr > 0; nr--, base++)
  25                 s5p_gpio_set_drvstr(base, S5P_GPIO_DRVSTR_LV4);
  26 }
  27
  28 void s5pc100_ide_setup_gpio(void)
  29 {
  30         u32 reg;
  31
  32         /* Independent CF interface, CF chip select configuration */
  33         reg = readl(S5PC100_MEM_SYS_CFG) & (~0x3f);
  34         writel(reg | MEM_SYS_CFG_EBI_FIX_PRI_CFCON, S5PC100_MEM_SYS_CFG);
  35
  36         /* CF_Add[0 - 2], CF_IORDY, CF_INTRQ, CF_DMARQ, CF_DMARST, CF_DMACK */
  37         s5pc100_ide_cfg_gpios(S5PC100_GPJ0(0), 8);
  38
  39         /*CF_Data[0 - 7] */
  40         s5pc100_ide_cfg_gpios(S5PC100_GPJ2(0), 8);
  41
  42         /* CF_Data[8 - 15] */
  43         s5pc100_ide_cfg_gpios(S5PC100_GPJ3(0), 8);
  44
  45         /* CF_CS0, CF_CS1, CF_IORD, CF_IOWR */
  46         s5pc100_ide_cfg_gpios(S5PC100_GPJ4(0), 4);
  47
  48         /* EBI_OE, EBI_WE */
  49         s3c_gpio_cfgpin_range(S5PC100_GPK0(6), 2, S3C_GPIO_SFN(0));
  50
  51         /* CF_OE, CF_WE */
  52         s3c_gpio_cfgrange_nopull(S5PC100_GPK1(6), 8, S3C_GPIO_SFN(2));
  53
  54         /* CF_CD */
  55         s3c_gpio_cfgpin(S5PC100_GPK3(5), S3C_GPIO_SFN(2));
  56         s3c_gpio_setpull(S5PC100_GPK3(5), S3C_GPIO_PULL_NONE);
  57 }