path: root/drivers/usb/dwc2/core.h

/*
 * core.h - DesignWare HS OTG Controller common declarations
 *
 * Copyright (C) 2004-2013 Synopsys, Inc.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions, and the following disclaimer,
 *    without modification.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. The names of the above-listed copyright holders may not be used
 *    to endorse or promote products derived from this software without
 *    specific prior written permission.
 *
 * ALTERNATIVELY, this software may be distributed under the terms of the
 * GNU General Public License ("GPL") as published by the Free Software
 * Foundation; either version 2 of the License, or (at your option) any
 * later version.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef __DWC2_CORE_H__
#define __DWC2_CORE_H__

#include <linux/usb/phy.h>
#include "hw.h"

#ifdef DWC2_LOG_WRITES
static inline void do_write(u32 value, void *addr)
{
	writel(value, addr);
	pr_info("INFO:: wrote %08x to %p\n", value, addr);
}

#undef writel
#define writel(v, a)	do_write(v, a)
#endif

/* Maximum number of Endpoints/HostChannels */
#define MAX_EPS_CHANNELS	16

struct dwc2_hsotg;
struct dwc2_host_chan;

/* Device States */
enum dwc2_lx_state {
	DWC2_L0,	/* On state */
	DWC2_L1,	/* LPM sleep state */
	DWC2_L2,	/* USB suspend state */
	DWC2_L3,	/* Off state */
};

/**
 * struct dwc2_core_params - Parameters for configuring the core
 *
 * @otg_cap:            Specifies the OTG capabilities.
 *                       0 - HNP and SRP capable
 *                       1 - SRP Only capable
 *                       2 - No HNP/SRP capable (always available)
 *                      Defaults to best available option (0, 1, then 2)
 * @otg_ver:            OTG version supported
 *                       0 - 1.3 (default)
 *                       1 - 2.0
 * @dma_enable:         Specifies whether to use slave or DMA mode for accessing
 *                      the data FIFOs. The driver will automatically detect the
 *                      value for this parameter if none is specified.
 *                       0 - Slave (always available)
 *                       1 - DMA (default, if available)
 * @dma_desc_enable:    When DMA mode is enabled, specifies whether to use
 *                      address DMA mode or descriptor DMA mode for accessing
 *                      the data FIFOs. The driver will automatically detect the
 *                      value for this if none is specified.
 *                       0 - Address DMA
 *                       1 - Descriptor DMA (default, if available)
 * @speed:              Specifies the maximum speed of operation in host and
 *                      device mode. The actual speed depends on the speed of
 *                      the attached device and the value of phy_type.
 *                       0 - High Speed
 *                           (default when phy_type is UTMI+ or ULPI)
 *                       1 - Full Speed
 *                           (default when phy_type is Full Speed)
 * @enable_dynamic_fifo: 0 - Use coreConsultant-specified FIFO size parameters
 *                       1 - Allow dynamic FIFO sizing (default, if available)
 * @en_multiple_tx_fifo: Specifies whether dedicated per-endpoint transmit FIFOs
 *                      are enabled
 * @host_rx_fifo_size:  Number of 4-byte words in the Rx FIFO in host mode when
 *                      dynamic FIFO sizing is enabled
 *                       16 to 32768
 *                      Actual maximum value is autodetected and also
 *                      the default.
 * @host_nperio_tx_fifo_size: Number of 4-byte words in the non-periodic Tx FIFO
 *                      in host mode when dynamic FIFO sizing is enabled
 *                       16 to 32768
 *                      Actual maximum value is autodetected and also
 *                      the default.
 * @host_perio_tx_fifo_size: Number of 4-byte words in the periodic Tx FIFO in
 *                      host mode when dynamic FIFO sizing is enabled
 *                       16 to 32768
 *                      Actual maximum value is autodetected and also
 *                      the default.
 * @max_transfer_size:  The maximum transfer size supported, in bytes
 *                       2047 to 65,535
 *                      Actual maximum value is autodetected and also
 *                      the default.
 * @max_packet_count:   The maximum number of packets in a transfer
 *                       15 to 511
 *                      Actual maximum value is autodetected and also
 *                      the default.
 * @host_channels:      The number of host channel registers to use
 *                       1 to 16
 *                      Actual maximum value is autodetected and also
 *                      the default.
 * @phy_type:           Specifies the type of PHY interface to use. By default,
 *                      the driver will automatically detect the phy_type.
 *                       0 - Full Speed Phy
 *                       1 - UTMI+ Phy
 *                       2 - ULPI Phy
 *                      Defaults to best available option (2, 1, then 0)
 * @phy_utmi_width:     Specifies the UTMI+ Data Width (in bits). This parameter
 *                      is applicable for a phy_type of UTMI+ or ULPI. (For a
 *                      ULPI phy_type, this parameter indicates the data width
 *                      between the MAC and the ULPI Wrapper.) Also, this
 *                      parameter is applicable only if the OTG_HSPHY_WIDTH cC
 *                      parameter was set to "8 and 16 bits", meaning that the
 *                      core has been configured to work at either data path
 *                      width.
 *                       8 or 16 (default 16 if available)
 * @phy_ulpi_ddr:       Specifies whether the ULPI operates at double or single
 *                      data rate. This parameter is only applicable if phy_type
 *                      is ULPI.
 *                       0 - single data rate ULPI interface with 8 bit wide
 *                           data bus (default)
 *                       1 - double data rate ULPI interface with 4 bit wide
 *                           data bus
 * @phy_ulpi_ext_vbus:  For a ULPI phy, specifies whether to use the internal or
 *                      external supply to drive the VBus
 *                       0 - Internal supply (default)
 *                       1 - External supply
 * @i2c_enable:         Specifies whether to use the I2Cinterface for a full
 *                      speed PHY. This parameter is only applicable if phy_type
 *                      is FS.
 *                       0 - No (default)
 *                       1 - Yes
 * @ulpi_fs_ls:         Make ULPI phy operate in FS/LS mode only
 *                       0 - No (default)
 *                       1 - Yes
 * @host_support_fs_ls_low_power: Specifies whether low power mode is supported
 *                      when attached to a Full Speed or Low Speed device in
 *                      host mode.
 *                       0 - Don't support low power mode (default)
 *                       1 - Support low power mode
 * @host_ls_low_power_phy_clk: Specifies the PHY clock rate in low power mode
 *                      when connected to a Low Speed device in host
 *                      mode. This parameter is applicable only if
 *                      host_support_fs_ls_low_power is enabled.
 *                       0 - 48 MHz
 *                           (default when phy_type is UTMI+ or ULPI)
 *                       1 - 6 MHz
 *                           (default when phy_type is Full Speed)
 * @ts_dline:           Enable Term Select Dline pulsing
 *                       0 - No (default)
 *                       1 - Yes
 * @reload_ctl:         Allow dynamic reloading of HFIR register during runtime
 *                       0 - No (default for core < 2.92a)
 *                       1 - Yes (default for core >= 2.92a)
 * @ahbcfg:             This field allows the default value of the GAHBCFG
 *                      register to be overridden
 *                       -1         - GAHBCFG value will be set to 0x06
 *                                    (INCR4, default)
 *                       all others - GAHBCFG value will be overridden with
 *                                    this value
 *                      Not all bits can be controlled like this, the
 *                      bits defined by GAHBCFG_CTRL_MASK are controlled
 *                      by the driver and are ignored in this
 *                      configuration value.
 * @uframe_sched:       True to enable the microframe scheduler
 *
 * The following parameters may be specified when starting the module. These
 * parameters define how the DWC_otg controller should be configured. A
 * value of -1 (or any other out of range value) for any parameter means
 * to read the value from hardware (if possible) or use the builtin
 * default described above.
 */
struct dwc2_core_params {
	/*
	 * Don't add any non-int members here, this will break
	 * dwc2_set_all_params!
	 */
	int otg_cap;
	int otg_ver;
	int dma_enable;
	int dma_desc_enable;
	int speed;
	int enable_dynamic_fifo;
	int en_multiple_tx_fifo;
	int host_rx_fifo_size;
	int host_nperio_tx_fifo_size;
	int host_perio_tx_fifo_size;
	int max_transfer_size;
	int max_packet_count;
	int host_channels;
	int phy_type;
	int phy_utmi_width;
	int phy_ulpi_ddr;
	int phy_ulpi_ext_vbus;
	int i2c_enable;
	int ulpi_fs_ls;
	int host_support_fs_ls_low_power;
	int host_ls_low_power_phy_clk;
	int ts_dline;
	int reload_ctl;
	int ahbcfg;
	int uframe_sched;
};

/**
 * struct dwc2_hw_params - Autodetected parameters.
 *
 * These parameters are the various parameters read from hardware
 * registers during initialization. They typically contain the best
 * supported or maximum value that can be configured in the
 * corresponding dwc2_core_params value.
 *
 * The values that are not in dwc2_core_params are documented below.
 *
 * @op_mode             Mode of Operation
 *                       0 - HNP- and SRP-Capable OTG (Host & Device)
 *                       1 - SRP-Capable OTG (Host & Device)
 *                       2 - Non-HNP and Non-SRP Capable OTG (Host & Device)
 *                       3 - SRP-Capable Device
 *                       4 - Non-OTG Device
 *                       5 - SRP-Capable Host
 *                       6 - Non-OTG Host
 * @arch                Architecture
 *                       0 - Slave only
 *                       1 - External DMA
 *                       2 - Internal DMA
 * @power_optimized     Are power optimizations enabled?
 * @num_dev_ep          Number of device endpoints available
 * @num_dev_perio_in_ep Number of device periodic IN endpoints
 *                      avaialable
 * @dev_token_q_depth   Device Mode IN Token Sequence Learning Queue
 *                      Depth
 *                       0 to 30
 * @host_perio_tx_q_depth
 *                      Host Mode Periodic Request Queue Depth
 *                       2, 4 or 8
 * @nperio_tx_q_depth
 *                      Non-Periodic Request Queue Depth
 *                       2, 4 or 8
 * @hs_phy_type         High-speed PHY interface type
 *                       0 - High-speed interface not supported
 *                       1 - UTMI+
 *                       2 - ULPI
 *                       3 - UTMI+ and ULPI
 * @fs_phy_type         Full-speed PHY interface type
 *                       0 - Full speed interface not supported
 *                       1 - Dedicated full speed interface
 *                       2 - FS pins shared with UTMI+ pins
 *                       3 - FS pins shared with ULPI pins
 * @total_fifo_size:    Total internal RAM for FIFOs (bytes)
 * @utmi_phy_data_width UTMI+ PHY data width
 *                       0 - 8 bits
 *                       1 - 16 bits
 *                       2 - 8 or 16 bits
 * @snpsid:             Value from SNPSID register
 */
struct dwc2_hw_params {
	unsigned op_mode:3;
	unsigned arch:2;
	unsigned dma_desc_enable:1;
	unsigned enable_dynamic_fifo:1;
	unsigned en_multiple_tx_fifo:1;
	unsigned host_rx_fifo_size:16;
	unsigned host_nperio_tx_fifo_size:16;
	unsigned host_perio_tx_fifo_size:16;
	unsigned nperio_tx_q_depth:3;
	unsigned host_perio_tx_q_depth:3;
	unsigned dev_token_q_depth:5;
	unsigned max_transfer_size:26;
	unsigned max_packet_count:11;
	unsigned host_channels:5;
	unsigned hs_phy_type:2;
	unsigned fs_phy_type:2;
	unsigned i2c_enable:1;
	unsigned num_dev_ep:4;
	unsigned num_dev_perio_in_ep:4;
	unsigned total_fifo_size:16;
	unsigned power_optimized:1;
	unsigned utmi_phy_data_width:2;
	u32 snpsid;
};

/**
 * struct dwc2_hsotg - Holds the state of the driver, including the non-periodic
 * and periodic schedules
 *
 * @dev:                The struct device pointer
 * @regs:		Pointer to controller regs
 * @core_params:        Parameters that define how the core should be configured
 * @hw_params:          Parameters that were autodetected from the
 *                      hardware registers
 * @op_state:           The operational State, during transitions (a_host=>
 *                      a_peripheral and b_device=>b_host) this may not match
 *                      the core, but allows the software to determine
 *                      transitions
 * @queuing_high_bandwidth: True if multiple packets of a high-bandwidth
 *                      transfer are in process of being queued
 * @srp_success:        Stores status of SRP request in the case of a FS PHY
 *                      with an I2C interface
 * @wq_otg:             Workqueue object used for handling of some interrupts
 * @wf_otg:             Work object for handling Connector ID Status Change
 *                      interrupt
 * @wkp_timer:          Timer object for handling Wakeup Detected interrupt
 * @lx_state:           Lx state of connected device
 * @flags:              Flags for handling root port state changes
 * @non_periodic_sched_inactive: Inactive QHs in the non-periodic schedule.
 *                      Transfers associated with these QHs are not currently
 *                      assigned to a host channel.
 * @non_periodic_sched_active: Active QHs in the non-periodic schedule.
 *                      Transfers associated with these QHs are currently
 *                      assigned to a host channel.
 * @non_periodic_qh_ptr: Pointer to next QH to process in the active
 *                      non-periodic schedule
 * @periodic_sched_inactive: Inactive QHs in the periodic schedule. This is a
 *                      list of QHs for periodic transfers that are _not_
 *                      scheduled for the next frame. Each QH in the list has an
 *                      interval counter that determines when it needs to be
 *                      scheduled for execution. This scheduling mechanism
 *                      allows only a simple calculation for periodic bandwidth
 *                      used (i.e. must assume that all periodic transfers may
 *                      need to execute in the same frame). However, it greatly
 *                      simplifies scheduling and should be sufficient for the
 *