board/ar7240/db12x-hybrid/db12x-hybrid.c

/*
 * Copyright (c) 2013 Qualcomm Atheros, Inc.
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

#include <common.h>
#include <command.h>
#include <asm/mipsregs.h>
#include <asm/addrspace.h>
#include <config.h>
#include <version.h>
#include "ar7240_soc.h"

extern int wasp_ddr_initial_config(uint32_t refresh);
extern int ar7240_ddr_find_size(void);

#ifdef COMPRESSED_UBOOT
#	define prmsg(...)
#else
#	define prmsg	printf
#endif

void
wasp_usb_initial_config(void)
{
#define unset(a)	(~(a))

	if ((ar7240_reg_rd(WASP_BOOTSTRAP_REG) & WASP_REF_CLK_25) == 0) {
		ar7240_reg_wr_nf(AR934X_SWITCH_CLOCK_SPARE,
			ar7240_reg_rd(AR934X_SWITCH_CLOCK_SPARE) |
			SWITCH_CLOCK_SPARE_USB_REFCLK_FREQ_SEL_SET(2));
	} else {
		ar7240_reg_wr_nf(AR934X_SWITCH_CLOCK_SPARE,
			ar7240_reg_rd(AR934X_SWITCH_CLOCK_SPARE) |
			SWITCH_CLOCK_SPARE_USB_REFCLK_FREQ_SEL_SET(5));
	}

	udelay(1000);
	ar7240_reg_wr(AR7240_RESET,
		ar7240_reg_rd(AR7240_RESET) |
		RST_RESET_USB_PHY_SUSPEND_OVERRIDE_SET(1));
	udelay(1000);
	ar7240_reg_wr(AR7240_RESET,
		ar7240_reg_rd(AR7240_RESET) &
		unset(RST_RESET_USB_PHY_RESET_SET(1)));
	udelay(1000);
	ar7240_reg_wr(AR7240_RESET,
		ar7240_reg_rd(AR7240_RESET) &
		unset(RST_RESET_USB_PHY_ARESET_SET(1)));
	udelay(1000);
	ar7240_reg_wr(AR7240_RESET,
		ar7240_reg_rd(AR7240_RESET) &
		unset(RST_RESET_USB_HOST_RESET_SET(1)));
	udelay(1000);
	if ((ar7240_reg_rd(AR7240_REV_ID) & 0xf) == 0) {
		/* Only for WASP 1.0 */
		ar7240_reg_wr(0xb8116c84 ,
			ar7240_reg_rd(0xb8116c84) & unset(1<<20));
	}
}

void wasp_gpio_config(void)
{
	/* disable the CLK_OBS on GPIO_4 and set GPIO4 as input */
	ar7240_reg_rmw_clear(GPIO_OE_ADDRESS, (1 << 4));
	ar7240_reg_rmw_clear(GPIO_OUT_FUNCTION1_ADDRESS, GPIO_OUT_FUNCTION1_ENABLE_GPIO_4_MASK);
	ar7240_reg_rmw_set(GPIO_OUT_FUNCTION1_ADDRESS, GPIO_OUT_FUNCTION1_ENABLE_GPIO_4_SET(0x80));
	ar7240_reg_rmw_set(GPIO_OE_ADDRESS, (1 << 4));
}

void ath_set_tuning_caps(void)
{
	typedef struct {
		u_int8_t	pad[0x28],
				params_for_tuning_caps[2],
				featureEnable;
	} __attribute__((__packed__)) ar9300_eeprom_t;

	ar9300_eeprom_t	*eep = (ar9300_eeprom_t *)WLANCAL;
	uint32_t	val;


	val = 0;
	/* checking feature enable bit 6 and caldata is valid */
	if ((eep->featureEnable & 0x40) && (eep->pad[0x0] != 0xff)) {
		/* xtal_capin -bit 17:23 and xtag_capout -bit 24:30*/
		val = (eep->params_for_tuning_caps[0] & 0x7f) << 17;
		val |= (eep->params_for_tuning_caps[0] & 0x7f) << 24;
	} else {
		/* default when no caldata available*/
		/* checking clock in bit 4 */
		if (ar7240_reg_rd(RST_BOOTSTRAP_ADDRESS) & 0x10) {
			val = (0x1020 << 17);  /*default 0x2040 for 40Mhz clock*/
		} else {
			val = (0x2040 << 17); /*default 0x4080 for 25Mhz clock*/
		}
	}
	val |= (ar7240_reg_rd(XTAL_ADDRESS) & (((1 << 17) - 1) | (1 << 31)));
	ar7240_reg_wr(XTAL_ADDRESS, val);
	prmsg("Setting 0xb8116290 to 0x%x\n", val);
	return;
}

int
wasp_mem_config(void)
{
#ifdef CONFIG_AP123
	extern void ath_ddr_tap_cal(void);
#endif
	unsigned int type, reg32;

	type = wasp_ddr_initial_config(CFG_DDR_REFRESH_VAL);

#ifdef CONFIG_AP123
	ath_ddr_tap_cal();

#ifndef COMPRESSED_UBOOT
	printf("Tap value selected = 0x%x [0x%x - 0x%x]\n",
		ar7240_reg_rd(AR7240_DDR_TAP_CONTROL0),
		ar7240_reg_rd(0xbd007f10), ar7240_reg_rd(0xbd007f14));
#endif
#endif

	/* Take WMAC out of reset */
	reg32 = ar7240_reg_rd(AR7240_RESET);
	reg32 = reg32 &  ~AR7240_RESET_WMAC;
	ar7240_reg_wr_nf(AR7240_RESET, reg32);

#if !defined(CONFIG_ATH_NAND_BR)
	/* Switching regulator settings */
	ar7240_reg_wr_nf(0x18116c40, 0x633c8176); /* AR_PHY_PMU1 */
	ar7240_reg_wr_nf(0x18116c44, 0x10380000); /* AR_PHY_PMU2 */

	wasp_usb_initial_config();

#endif /* !defined(CONFIG_ATH_NAND_BR) */

	wasp_gpio_config();

	ath_set_tuning_caps(); /* Needed here not to mess with Ethernet clocks */ 

	reg32 = ar7240_ddr_find_size();

	return reg32;
}

long int initdram(int board_type)
{
	return (wasp_mem_config());
}

#ifdef COMPRESSED_UBOOT
int	checkboard(char *s)
#else
int	checkboard(void)
#endif
{
#ifdef COMPRESSED_UBOOT
#if CONFIG_AP123
	strcpy(s, "U-boot AP123\n");
#elif CONFIG_MI124
	strcpy(s, "U-boot MI124\n");
#else
	strcpy(s, "U-boot DB120\n");
#endif
#endif
#if CONFIG_AP123
	prmsg("U-boot AP123\n");
#elif CONFIG_MI124
	prmsg("U-boot MI124\n");
#else
	prmsg("U-boot DB120\n");
#endif
	return 0;
}