arch/arm/mach-s3c/setup-ide-s3c64xx.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 //
   3 // Copyright (c) 2010 Samsung Electronics Co., Ltd.
   4 //              http://www.samsung.com/
   5 //
   6 // S3C64XX setup information for IDE
   7
   8 #include <linux/kernel.h>
   9 #include <linux/gpio.h>
  10 #include <linux/io.h>
  11
  12 #include <linux/platform_data/ata-samsung_cf.h>
  13
  14 #include "map.h"
  15 #include "regs-clock.h"
  16 #include "gpio-cfg.h"
  17 #include "gpio-samsung.h"
  18
  19 void s3c64xx_ide_setup_gpio(void)
  20 {
  21         u32 reg;
  22
  23         reg = readl(S3C_MEM_SYS_CFG) & (~0x3f);
  24
  25         /* Independent CF interface, CF chip select configuration */
  26         writel(reg | MEM_SYS_CFG_INDEP_CF |
  27                 MEM_SYS_CFG_EBI_FIX_PRI_CFCON, S3C_MEM_SYS_CFG);
  28
  29         s3c_gpio_cfgpin(S3C64XX_GPB(4), S3C_GPIO_SFN(4));
  30
  31         /* Set XhiDATA[15:0] pins as CF Data[15:0] */
  32         s3c_gpio_cfgpin_range(S3C64XX_GPK(0), 16, S3C_GPIO_SFN(5));
  33
  34         /* Set XhiADDR[2:0] pins as CF ADDR[2:0] */
  35         s3c_gpio_cfgpin_range(S3C64XX_GPL(0), 3, S3C_GPIO_SFN(6));
  36
  37         /* Set Xhi ctrl pins as CF ctrl pins(IORDY, IOWR, IORD, CE[0:1]) */
  38         s3c_gpio_cfgpin(S3C64XX_GPM(5), S3C_GPIO_SFN(1));
  39         s3c_gpio_cfgpin_range(S3C64XX_GPM(0), 5, S3C_GPIO_SFN(6));
  40 }