/* SPDX-License-Identifier: GPL-2.0 */
/*
* Generic ULPI interface.
*
* Copyright (C) 2011 Jana Rapava <fermata7@gmail.com>
* Copyright (C) 2011 CompuLab, Ltd. <www.compulab.co.il>
*
* Authors: Jana Rapava <fermata7@gmail.com>
* Igor Grinberg <grinberg@compulab.co.il>
*
* Register offsets taken from:
* linux/include/linux/usb/ulpi.h
*
* Original Copyrights follow:
* Copyright (C) 2010 Nokia Corporation
*/
#ifndef __USB_ULPI_H__
#define __USB_ULPI_H__
#define ULPI_ERROR (1 << 8) /* overflow from any register value */
#ifndef CONFIG_USB_ULPI_TIMEOUT
#define CONFIG_USB_ULPI_TIMEOUT 1000 /* timeout in us */
#endif
/*
* ulpi view port address and
* Port_number that can be passed.
* Any additional data to be passed can
* be extended from this structure
*/
struct ulpi_viewport {
uintptr_t viewport_addr;
u32 port_num;
};
/*
* Initialize the ULPI transciever and check the interface integrity.
* @ulpi_vp - structure containing ULPI viewport data
*
* returns 0 on success, ULPI_ERROR on failure.
*/
int ulpi_init(struct ulpi_viewport *ulpi_vp);
/*
* Select transceiver speed.
* @speed - ULPI_FC_HIGH_SPEED, ULPI_FC_FULL_SPEED (default),
* ULPI_FC_LOW_SPEED, ULPI_FC_FS4LS
* returns 0 on success, ULPI_ERROR on failure.
*/
int ulpi_select_transceiver(struct ulpi_viewport *ulpi_vp, unsigned speed);
/*
* Enable/disable VBUS.
* @ext_power - external VBUS supply is used (default is false)
* @ext_indicator - external VBUS over-current indicator is used
*
* returns 0 on success, ULPI_ERROR on failure.
*/
int ulpi_set_vbus(struct ulpi_viewport *ulpi_vp, int on, int ext_power);
/*
* Configure VBUS indicator
* @external - external VBUS over-current indicator is used
* @passthru - disables ANDing of internal VBUS comparator
* with external VBUS input
* @complement - inverts the external VBUS input
*/
int ulpi_set_vbus_indicator(struct ulpi_viewport *ulpi_vp, int external,
int passthru, int complement);
/*
* Enable/disable pull-down resistors on D+ and D- USB lines.
*
* returns 0 on success, ULPI_ERROR on failure.
*/
int ulpi_set_pd(struct ulpi_viewport *ulpi_vp, int enable);
/*
* Select OpMode.
* @opmode - ULPI_FC_OPMODE_NORMAL (default), ULPI_FC_OPMODE_NONDRIVING,
* ULPI_FC_OPMODE_DISABLE_NRZI, ULPI_FC_OPMODE_NOSYNC_NOEOP
*
* returns 0 on success, ULPI_ERROR on failure.
*/
int ulpi_opmode_sel(struct ulpi_viewport *ulpi_vp, unsigned opmode);
/*
* Switch to Serial Mode.
* @smode - ULPI_IFACE_6_PIN_SERIAL_MODE or ULPI_IFACE_3_PIN_SERIAL_MODE
*
* returns 0 on success, ULPI_ERROR on failure.
*
* Notes:
* Switches immediately to Serial Mode.
* To return from Serial Mode, STP line needs to be asserted.
*/
int ulpi_serial_mode_enable(struct ulpi_viewport *ulpi_vp, unsigned smode);
/*
* Put PHY into low power mode.
*
* returns 0 on success, ULPI_ERROR on failure.
*
* Notes:
* STP line must be driven low to keep the PHY in suspend.
* To resume the PHY, STP line needs to be asserted.
*/
int ulpi_suspend(struct ulpi_viewport *ulpi_vp);
/*
* Reset the transceiver. ULPI interface and registers are not affected.
*
* returns 0 on success, ULPI_ERROR on failure.
*/
int ulpi_reset(struct ulpi_viewport *ulpi_vp);
/* ULPI access methods below must be implemented for each ULPI viewport. */
/*
* Write to the ULPI PHY register via the viewport.
* @reg - the ULPI register (one of the fields in struct ulpi_regs).
* Due to ULPI design, only 8 lsb of address are used.
* @value - the value - only 8 lower bits are used, others ignored.
*
* returns 0 on success, ULPI_ERROR on failure.
*/
int ulpi_write(struct ulpi_viewport *ulpi_vp, u8 *reg, u32 value);
/*
* Read the ULPI PHY register content via the viewport.
* @reg - the ULPI register (one of the fields in struct ulpi_regs).
* Due to ULPI design, only 8 lsb of address are used.
*
* returns register content on success, ULPI_ERROR on failure.
*/
u32 ulpi_read(struct ulpi_viewport *ulpi_vp, u8 *reg);
/*
* Wait for the reset to complete.
* The Link must not attempt to access the PHY until the reset has
* completed and DIR line is de-asserted.
*/
int ulpi_reset_wait(struct ulpi_viewport *ulpi_vp);
/* Access Extended Register Set (indicator) */
#define ACCESS_EXT_REGS_OFFSET 0x2f /* read-write */
/* Vendor-specific */
#define VENDOR_SPEC_OFFSET 0x30
/*
* Extended Register Set
*
* Addresses 0x00-0x3F map directly to Immediate Register Set.
* Addresses 0x40-0x7F are reserved.
* Addresses 0x80-0xff are vendor-specific.
*/
#define EXT_VENDOR_SPEC_OFFSET 0x80
/* ULPI registers, bits and offsets definitions */
struct ulpi_regs {
/* Vendor ID and Product ID: 0x00 - 0x03 Read-only */
u8 vendor_id_low;
u8 vendor_id_high;
u8 product_id_low;
u8 product_id_high;
/* Function Control: 0x04 - 0x06 Read */
u8 function_ctrl; /* 0x04 Write */
u8 function_ctrl_set; /* 0x05 Set */
u8 function_ctrl_clear; /* 0x06 Clear */
/* Interface Control: 0x07 - 0x09 Read */
u8 iface_ctrl; /* 0x07 Write */
u8 iface_ctrl_set; /* 0x08 Set */
u8 iface_ctrl_clear; /* 0x09 Clear */
/* OTG Control: 0x0A - 0x0C Read */
u8 otg_ctrl; /* 0x0A Write */
u8 otg_ctrl_set; /* 0x0B Set */
u8 otg_ctrl_clear; /* 0x0C Clear */
/* USB Interrupt Enable Rising: 0x0D - 0x0F Read */
u8 usb_ie_rising; /* 0x0D Write */
u8 usb_ie_rising_set; /* 0x0E Set */
u8 usb_ie_rising_clear; /* 0x0F Clear */
/* USB Interrupt Enable Falling: 0x10 - 0x12 Read */
u8 usb_ie_falling; /* 0x10 Write */
u8 usb_ie_falling_set; /* 0x11 Set */
u8 usb_ie_falling_clear; /* 0x12 Clear */
/* USB Interrupt Status: 0x13 Read-only */
u8 usb_int_status;
/* USB Interrupt Latch: 0x14 Read-only with auto-clear */
u8 usb_int_latch;
/* Debug: 0x15 Read-only */
u8 debug;
/* Scratch Register: 0x16 - 0x18 Read */
u8 scratch; /* 0x16 Write */
u8 scratch_set; /* 0x17 Set */
u8 scratch_clear; /* 0x18 Clear */
/*
* Optional Carkit registers:
* Carkit Control: 0x19 - 0x1B Read
*/
u8 carkit_ctrl; /* 0x19 Write */
u8 carkit_ctrl_set; /* 0x1A Set */
u8 carkit_ctrl_clear; /* 0x1B Clear */
/* Carkit Interrupt Delay: 0x1C Read, Write */
u8 carkit_int_delay;
/* Carkit Interrupt Enable: 0x1D - 0x1F Read */
u8 carkit_ie; /* 0x1D Write */
u8 carkit_ie_set; /* 0x1E Set */
u8 carkit_ie_clear; /* 0x1F Clear */
/* Carkit Interrupt Status: 0x20 Read-only */
u8 carkit_int_status;
/* Carkit Interrupt Latch: 0x21 Read-only with auto-clear */
u8 carkit_int_latch;
/* Carkit Pulse Control: 0x22 - 0x24 Read */
u8 carkit_pulse_ctrl; /* 0x22 Write */
u8 carkit_pulse_ctrl_set; /* 0x23 Set */
u8 carkit_pulse_ctrl_clear; /* 0x24 Clear */
/*
* Other optional registers:
* Transmit Positive Width: 0x25 Read, Write
*/
u8 transmit_pos_width;
/* Transmit Negative Width: 0x26 Read, Write */
u8 transmit_neg_width;
/* Receive Polarity Recovery: 0x27 Read, Write */
u8 recv_pol_recovery;
/*
* Addresses 0x28 - 0x2E are reserved, so we use offsets
* for immediate registers with higher addresses
*/
};
/*
* Register Bits
*/
/* Function Control */
#define ULPI_FC_XCVRSEL_MASK (3 << 0)
#define ULPI_FC_HIGH_SPEED (0 << 0)
#define ULPI_FC_FULL_SPEED (1 << 0)
#define ULPI_FC_LOW_SPEED (2 << 0)
#define ULPI_FC_FS4LS (3 << 0)
#define ULPI_FC_TERMSELECT (1 << 2)
#define ULPI_FC_OPMODE_MASK (3 << 3)
#define ULPI_FC_OPMODE_NORMAL (0 << 3)
#define ULPI_FC_OPMODE_NONDRIVING (1 << 3)
#define ULPI_FC_OPMODE_DISABLE_NRZI (2 << 3)
#define ULPI_FC_OPMODE_NOSYNC_NOEOP (3 << 3)
#define ULPI_FC_RESET (1 << 5)
#define ULPI_FC_SUSPENDM (1 << 6)
/* Interface Control */
#define ULPI_IFACE_6_PIN_SERIAL_MODE (1 << 0)
#define ULPI_IFACE_3_PIN_SERIAL_MODE (1 << 1)
#define ULPI_IFACE_CARKITMODE (1 << 2)
#define ULPI_IFACE_CLOCKSUSPENDM (1 << 3)
#define ULPI_IFACE_AUTORESUME (1 << 4)
#define ULPI_IFACE_EXTVBUS_COMPLEMENT (1 << 5)
#define ULPI_IFACE_PASSTHRU (1 << 6)
#define ULPI_IFACE_PROTECT_IFC_DISABLE (1 << 7)
/* OTG Control */
#define ULPI_OTG_ID_PULLUP (1 << 0)
#define ULPI_OTG_DP_PULLDOWN (1 << 1)
#define ULPI_OTG_DM_PULLDOWN (1 << 2)
#define ULPI_OTG_DISCHRGVBUS (1 << 3)
#define ULPI_OTG_CHRGVBUS (1 << 4)
#define ULPI_OTG_DRVVBUS (1 << 5)
#define ULPI_OTG_DRVVBUS_EXT (1 << 6)
#define ULPI_OTG_EXTVBUSIND (1 << 7)
/*
* USB Interrupt Enable Rising,
* USB Interrupt Enable Falling,
* USB Interrupt Status and
* USB Interrupt Latch
*/
#define ULPI_INT_HOST_DISCONNECT (1 << 0)
#define ULPI_INT_VBUS_VALID (1 << 1)
#define ULPI_INT_SESS_VALID (1 << 2)
#define ULPI_INT_SESS_END (1 << 3)
#define ULPI_INT_IDGRD (1 << 4)
/* Debug */
#define ULPI_DEBUG_LINESTATE0 (1 << 0)
#define ULPI_DEBUG_LINESTATE1 (1 << 1)
/* Carkit Control */
#define ULPI_CARKIT_CTRL_CARKITPWR (1 << 0)
#define ULPI_CARKIT_CTRL_IDGNDDRV (1 << 1)
#define ULPI_CARKIT_CTRL_TXDEN (1 << 2)
#define ULPI_CARKIT_CTRL_RXDEN (1 << 3)
#define ULPI_CARKIT_CTRL_SPKLEFTEN (1 << 4)
#define ULPI_CARKIT_CTRL_SPKRIGHTEN (1 << 5)
#define ULPI_CARKIT_CTRL_MICEN (1 << 6)
/* Carkit Interrupt Enable */
#define ULPI_CARKIT_INT_EN_IDFLOAT_RISE (1 << 0)
#define ULPI_CARKIT_INT_EN_IDFLOAT_FALL (1 << 1)
#define ULPI_CARKIT_INT_EN_CARINTDET (1 << 2)
#define ULPI_CARKIT_INT_EN_DP_RISE (1 << 3)
#define ULPI_CARKIT_INT_EN_DP_FALL (1 << 4)
/* Carkit Interrupt Status and Latch */
#define ULPI_CARKIT_INT_IDFLOAT (1 << 0)
#define ULPI_CARKIT_INT_CARINTDET (1 << 1)
#define ULPI_CARKIT_INT_DP (1 << 2)
/* Carkit Pulse Control*/
#define ULPI_CARKIT_PLS_CTRL_TXPLSEN (1 << 0)
#define ULPI_CARKIT_PLS_CTRL_RXPLSEN (1 << 1)
#define ULPI_CARKIT_PLS_CTRL_SPKRLEFT_BIASEN (1 << 2)
#define ULPI_CARKIT_PLS_CTRL_SPKRRIGHT_BIASEN (1 << 3)
#endif /* __USB_ULPI_H__ */