text: // SPDX-License-Identifier: GPL-2.0+
  /*
   * (C) Copyright 2014 CompuLab, Ltd. <www.compulab.co.il>
   *
   * Authors: Igor Grinberg <grinberg@compulab.co.il>
   */
  
  #include <common.h>
  #include <netdev.h>
  
  #include <asm/io.h>
  #include <linux/errno.h>
  #include <asm/arch/cpu.h>
  #include <asm/arch/mem.h>
  #include <asm/arch/sys_proto.h>
  #include <asm/gpio.h>
  
  #include "common.h"
  
  static u32 cl_omap3_smc911x_gpmc_net_config[GPMC_MAX_REG] = {
  	NET_GPMC_CONFIG1,
  	NET_GPMC_CONFIG2,
  	NET_GPMC_CONFIG3,
  	NET_GPMC_CONFIG4,
  	NET_GPMC_CONFIG5,
  	NET_GPMC_CONFIG6,
  	0
  };
  
  static void cl_omap3_smc911x_setup_net_chip_gmpc(int cs, u32 base_addr)
  {
  	struct ctrl *ctrl_base = (struct ctrl *)OMAP34XX_CTRL_BASE;
  
  	enable_gpmc_cs_config(cl_omap3_smc911x_gpmc_net_config,
  			      &gpmc_cfg->cs[cs], base_addr, GPMC_SIZE_16M);
  
  	/* Enable off mode for NWE in PADCONF_GPMC_NWE register */
  	writew(readw(&ctrl_base->gpmc_nwe) | 0x0E00, &ctrl_base->gpmc_nwe);
  
  	/* Enable off mode for NOE in PADCONF_GPMC_NADV_ALE register */
  	writew(readw(&ctrl_base->gpmc_noe) | 0x0E00, &ctrl_base->gpmc_noe);
  
  	/* Enable off mode for ALE in PADCONF_GPMC_NADV_ALE register */
  	writew(readw(&ctrl_base->gpmc_nadv_ale) | 0x0E00,
  	       &ctrl_base->gpmc_nadv_ale);
  }
  
  #ifdef CONFIG_OMAP_GPIO
  static int cl_omap3_smc911x_reset_net_chip(int gpio)
  {
  	int err;
  
  	if (!gpio_is_valid(gpio))
  		return -EINVAL;
  
  	err = gpio_request(gpio, "eth rst");
  	if (err)
  		return err;
  
  	/* Set gpio as output and send a pulse */
  	gpio_direction_output(gpio, 1);
  	udelay(1);
  	gpio_set_value(gpio, 0);
  	mdelay(40);
  	gpio_set_value(gpio, 1);
  	mdelay(1);
  
  	return 0;
  }
  #else /* !CONFIG_OMAP_GPIO */
  static inline int cl_omap3_smc911x_reset_net_chip(int gpio) { return 0; }
  #endif /* CONFIG_OMAP_GPIO */
  
  int cl_omap3_smc911x_init(int id, int cs, u32 base_addr,
  			  int (*reset)(int), int rst_gpio)
  {
  	int ret;
  
  	cl_omap3_smc911x_setup_net_chip_gmpc(cs, base_addr);
  
  	if (reset)
  		reset(rst_gpio);
  	else
  		cl_omap3_smc911x_reset_net_chip(rst_gpio);
  
  	ret = smc911x_initialize(id, base_addr);
  	if (ret > 0)
  		return ret;
  
  	printf("Failed initializing SMC911x! ");
  	return 0;
  }
  