[u-boot.git] / drivers / phy / phy-da8xx-usb.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * Based on the DA8xx "glue layer" code.
 * Copyright (c) 2008-2019, MontaVista Software, Inc. <[email protected]>
 *
 * DT support added by: Adam Ford <[email protected]>
 */

#include <common.h>
#include <dm.h>
#include <log.h>
#include <dm/device-internal.h>
#include <dm/lists.h>
#include <asm/arch/hardware.h>
#include <asm/arch/da8xx-usb.h>
#include <asm/io.h>
#include <generic-phy.h>

static int da8xx_usb_phy_power_on(struct phy *phy)
{
	unsigned long timeout;

	clrsetbits_le32(&davinci_syscfg_regs->cfgchip2,
			CFGCHIP2_RESET | CFGCHIP2_PHYPWRDN | CFGCHIP2_OTGPWRDN |
			CFGCHIP2_OTGMODE | CFGCHIP2_REFFREQ,
			CFGCHIP2_SESENDEN | CFGCHIP2_VBDTCTEN |
			CFGCHIP2_PHY_PLLON | CFGCHIP2_REFFREQ_24MHZ);

	/* wait until the usb phy pll locks */
	timeout = get_timer(0);
	while (get_timer(timeout) < 10) {
		if (readl(&davinci_syscfg_regs->cfgchip2) & CFGCHIP2_PHYCLKGD)
			return 0;
	}

	debug("Phy was not turned on\n");

	return -ENODEV;
}

static int da8xx_usb_phy_power_off(struct phy *phy)
{
	clrsetbits_le32(&davinci_syscfg_regs->cfgchip2,
			CFGCHIP2_PHY_PLLON,
			CFGCHIP2_PHYPWRDN | CFGCHIP2_OTGPWRDN);

	return 0;
}

static const struct udevice_id da8xx_phy_ids[] = {
	{ .compatible = "ti,da830-usb-phy" },
	{ }
};

static struct phy_ops da8xx_phy_ops = {
	.power_on = da8xx_usb_phy_power_on,
	.power_off = da8xx_usb_phy_power_off,
};

U_BOOT_DRIVER(da8xx_phy) = {
	.name	= "da8xx-usb-phy",
	.id	= UCLASS_PHY,
	.of_match = da8xx_phy_ids,
	.ops = &da8xx_phy_ops,
};
Commit	Line	Data
fc58263d AF	1	// SPDX-License-Identifier: GPL-2.0+
	2	/*
	3	* Based on the DA8xx "glue layer" code.
	4	* Copyright (c) 2008-2019, MontaVista Software, Inc. <[email protected]>
	5	*
	6	* DT support added by: Adam Ford <[email protected]>
	7	*/
	8
	9	#include <common.h>
	10	#include <dm.h>
f7ae49fc	11	#include <log.h>
fc58263d AF	12	#include <dm/device-internal.h>
	13	#include <dm/lists.h>
	14	#include <asm/arch/hardware.h>
	15	#include <asm/arch/da8xx-usb.h>
	16	#include <asm/io.h>
	17	#include <generic-phy.h>
	18
	19	static int da8xx_usb_phy_power_on(struct phy *phy)
	20	{
	21	unsigned long timeout;
	22
	23	clrsetbits_le32(&davinci_syscfg_regs->cfgchip2,
	24	CFGCHIP2_RESET \| CFGCHIP2_PHYPWRDN \| CFGCHIP2_OTGPWRDN \|
	25	CFGCHIP2_OTGMODE \| CFGCHIP2_REFFREQ,
	26	CFGCHIP2_SESENDEN \| CFGCHIP2_VBDTCTEN \|
	27	CFGCHIP2_PHY_PLLON \| CFGCHIP2_REFFREQ_24MHZ);
	28
	29	/* wait until the usb phy pll locks */
	30	timeout = get_timer(0);
	31	while (get_timer(timeout) < 10) {
	32	if (readl(&davinci_syscfg_regs->cfgchip2) & CFGCHIP2_PHYCLKGD)
	33	return 0;
	34	}
	35
	36	debug("Phy was not turned on\n");
	37
	38	return -ENODEV;
	39	}
	40
	41	static int da8xx_usb_phy_power_off(struct phy *phy)
	42	{
	43	clrsetbits_le32(&davinci_syscfg_regs->cfgchip2,
	44	CFGCHIP2_PHY_PLLON,
	45	CFGCHIP2_PHYPWRDN \| CFGCHIP2_OTGPWRDN);
	46
	47	return 0;
	48	}
	49
	50	static const struct udevice_id da8xx_phy_ids[] = {
	51	{ .compatible = "ti,da830-usb-phy" },
	52	{ }
	53	};
	54
	55	static struct phy_ops da8xx_phy_ops = {
	56	.power_on = da8xx_usb_phy_power_on,
	57	.power_off = da8xx_usb_phy_power_off,
	58	};
	59
	60	U_BOOT_DRIVER(da8xx_phy) = {
	61	.name = "da8xx-usb-phy",
	62	.id = UCLASS_PHY,
	63	.of_match = da8xx_phy_ids,
	64	.ops = &da8xx_phy_ops,
	65	};