arch/arm/mach-s3c64xx/setup-ide.c

   1 /* linux/arch/arm/mach-s3c64xx/setup-ide.c
   2  *
   3  * Copyright (c) 2010 Samsung Electronics Co., Ltd.
   4  *              http://www.samsung.com/
   5  *
   6  * S3C64XX 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/map.h>
  18 #include <mach/regs-clock.h>
  19 #include <plat/gpio-cfg.h>
  20 #include <mach/gpio-samsung.h>
  21 #include <linux/platform_data/ata-samsung_cf.h>
  22
  23 void s3c64xx_ide_setup_gpio(void)
  24 {
  25         u32 reg;
  26
  27         reg = readl(S3C_MEM_SYS_CFG) & (~0x3f);
  28
  29         /* Independent CF interface, CF chip select configuration */
  30         writel(reg | MEM_SYS_CFG_INDEP_CF |
  31                 MEM_SYS_CFG_EBI_FIX_PRI_CFCON, S3C_MEM_SYS_CFG);
  32
  33         s3c_gpio_cfgpin(S3C64XX_GPB(4), S3C_GPIO_SFN(4));
  34
  35         /* Set XhiDATA[15:0] pins as CF Data[15:0] */
  36         s3c_gpio_cfgpin_range(S3C64XX_GPK(0), 16, S3C_GPIO_SFN(5));
  37
  38         /* Set XhiADDR[2:0] pins as CF ADDR[2:0] */
  39         s3c_gpio_cfgpin_range(S3C64XX_GPL(0), 3, S3C_GPIO_SFN(6));
  40
  41         /* Set Xhi ctrl pins as CF ctrl pins(IORDY, IOWR, IORD, CE[0:1]) */
  42         s3c_gpio_cfgpin(S3C64XX_GPM(5), S3C_GPIO_SFN(1));
  43         s3c_gpio_cfgpin_range(S3C64XX_GPM(0), 5, S3C_GPIO_SFN(6));
  44 }