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u-boot/drivers/usb/host/dwc2.c
João Loureiro dcd2bbe051 usb: dwc2: Avoid delay when initializing USB peripheral by dwc2 
When `usb start` is called on the terminal, the dwc2 driver will try
to start every USB device as host first, even if it is explicitly
configured as peripheral in the device tree (dr_mode = "peripheral").

So to avoid an unwanted 15 seconds delay when initializing the usb
(one second per channel = 1s x 15), this patch adds a check to the
initialization, and will skip host initialization of the device is
explicitly set as peripheral. The checking is already done similarly
in the `drivers/usb/gadget/dwc2_udc_otg.c` driver.

Signed-off-by: João Loureiro <joaofl@gmail.com>
2021-06-09 10:54:26 +02:00

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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2012 Oleksandr Tymoshenko <gonzo@freebsd.org>
* Copyright (C) 2014 Marek Vasut <marex@denx.de>
*/
#include <common.h>
#include <clk.h>
#include <cpu_func.h>
#include <dm.h>
#include <errno.h>
#include <generic-phy.h>
#include <log.h>
#include <malloc.h>
#include <memalign.h>
#include <phys2bus.h>
#include <usb.h>
#include <usbroothubdes.h>
#include <wait_bit.h>
#include <asm/cache.h>
#include <asm/io.h>
#include <dm/device_compat.h>
#include <linux/delay.h>
#include <linux/usb/otg.h>
#include <power/regulator.h>
#include <reset.h>
#include "dwc2.h"
/* Use only HC channel 0. */
#define DWC2_HC_CHANNEL 0
#define DWC2_STATUS_BUF_SIZE 64
#define DWC2_DATA_BUF_SIZE (CONFIG_USB_DWC2_BUFFER_SIZE * 1024)
#define MAX_DEVICE 16
#define MAX_ENDPOINT 16
struct dwc2_priv {
#if CONFIG_IS_ENABLED(DM_USB)
uint8_t aligned_buffer[DWC2_DATA_BUF_SIZE] __aligned(ARCH_DMA_MINALIGN);
uint8_t status_buffer[DWC2_STATUS_BUF_SIZE] __aligned(ARCH_DMA_MINALIGN);
#ifdef CONFIG_DM_REGULATOR
struct udevice *vbus_supply;
#endif
struct phy phy;
struct clk_bulk clks;
#else
uint8_t *aligned_buffer;
uint8_t *status_buffer;
#endif
u8 in_data_toggle[MAX_DEVICE][MAX_ENDPOINT];
u8 out_data_toggle[MAX_DEVICE][MAX_ENDPOINT];
struct dwc2_core_regs *regs;
int root_hub_devnum;
bool ext_vbus;
/*
* The hnp/srp capability must be disabled if the platform
* does't support hnp/srp. Otherwise the force mode can't work.
*/
bool hnp_srp_disable;
bool oc_disable;
struct reset_ctl_bulk resets;
};
#if !CONFIG_IS_ENABLED(DM_USB)
/* We need cacheline-aligned buffers for DMA transfers and dcache support */
DEFINE_ALIGN_BUFFER(uint8_t, aligned_buffer_addr, DWC2_DATA_BUF_SIZE,
ARCH_DMA_MINALIGN);
DEFINE_ALIGN_BUFFER(uint8_t, status_buffer_addr, DWC2_STATUS_BUF_SIZE,
ARCH_DMA_MINALIGN);
static struct dwc2_priv local;
#endif
/*
* DWC2 IP interface
*/
/*
* Initializes the FSLSPClkSel field of the HCFG register
* depending on the PHY type.
*/
static void init_fslspclksel(struct dwc2_core_regs *regs)
{
uint32_t phyclk;
#if (CONFIG_DWC2_PHY_TYPE == DWC2_PHY_TYPE_FS)
phyclk = DWC2_HCFG_FSLSPCLKSEL_48_MHZ; /* Full speed PHY */
#else
/* High speed PHY running at full speed or high speed */
phyclk = DWC2_HCFG_FSLSPCLKSEL_30_60_MHZ;
#endif
#ifdef CONFIG_DWC2_ULPI_FS_LS
uint32_t hwcfg2 = readl(&regs->ghwcfg2);
uint32_t hval = (ghwcfg2 & DWC2_HWCFG2_HS_PHY_TYPE_MASK) >>
DWC2_HWCFG2_HS_PHY_TYPE_OFFSET;
uint32_t fval = (ghwcfg2 & DWC2_HWCFG2_FS_PHY_TYPE_MASK) >>
DWC2_HWCFG2_FS_PHY_TYPE_OFFSET;
if (hval == 2 && fval == 1)
phyclk = DWC2_HCFG_FSLSPCLKSEL_48_MHZ; /* Full speed PHY */
#endif
clrsetbits_le32(&regs->host_regs.hcfg,
DWC2_HCFG_FSLSPCLKSEL_MASK,
phyclk << DWC2_HCFG_FSLSPCLKSEL_OFFSET);
}
/*
* Flush a Tx FIFO.
*
* @param regs Programming view of DWC_otg controller.
* @param num Tx FIFO to flush.
*/
static void dwc_otg_flush_tx_fifo(struct udevice *dev,
struct dwc2_core_regs *regs, const int num)
{
int ret;
writel(DWC2_GRSTCTL_TXFFLSH | (num << DWC2_GRSTCTL_TXFNUM_OFFSET),
&regs->grstctl);
ret = wait_for_bit_le32(&regs->grstctl, DWC2_GRSTCTL_TXFFLSH,
false, 1000, false);
if (ret)
dev_info(dev, "%s: Timeout!\n", __func__);
/* Wait for 3 PHY Clocks */
udelay(1);
}
/*
* Flush Rx FIFO.
*
* @param regs Programming view of DWC_otg controller.
*/
static void dwc_otg_flush_rx_fifo(struct udevice *dev,
struct dwc2_core_regs *regs)
{
int ret;
writel(DWC2_GRSTCTL_RXFFLSH, &regs->grstctl);
ret = wait_for_bit_le32(&regs->grstctl, DWC2_GRSTCTL_RXFFLSH,
false, 1000, false);
if (ret)
dev_info(dev, "%s: Timeout!\n", __func__);
/* Wait for 3 PHY Clocks */
udelay(1);
}
/*
* Do core a soft reset of the core. Be careful with this because it
* resets all the internal state machines of the core.
*/
static void dwc_otg_core_reset(struct udevice *dev,
struct dwc2_core_regs *regs)
{
int ret;
/* Wait for AHB master IDLE state. */
ret = wait_for_bit_le32(&regs->grstctl, DWC2_GRSTCTL_AHBIDLE,
true, 1000, false);
if (ret)
dev_info(dev, "%s: Timeout!\n", __func__);
/* Core Soft Reset */
writel(DWC2_GRSTCTL_CSFTRST, &regs->grstctl);
ret = wait_for_bit_le32(&regs->grstctl, DWC2_GRSTCTL_CSFTRST,
false, 1000, false);
if (ret)
dev_info(dev, "%s: Timeout!\n", __func__);
/*
* Wait for core to come out of reset.
* NOTE: This long sleep is _very_ important, otherwise the core will
* not stay in host mode after a connector ID change!
*/
mdelay(100);
}
#if CONFIG_IS_ENABLED(DM_USB) && defined(CONFIG_DM_REGULATOR)
static int dwc_vbus_supply_init(struct udevice *dev)
{
struct dwc2_priv *priv = dev_get_priv(dev);
int ret;
ret = device_get_supply_regulator(dev, "vbus-supply",
&priv->vbus_supply);
if (ret) {
debug("%s: No vbus supply\n", dev->name);
return 0;
}
ret = regulator_set_enable(priv->vbus_supply, true);
if (ret) {
dev_err(dev, "Error enabling vbus supply\n");
return ret;
}
return 0;
}
static int dwc_vbus_supply_exit(struct udevice *dev)
{
struct dwc2_priv *priv = dev_get_priv(dev);
int ret;
if (priv->vbus_supply) {
ret = regulator_set_enable(priv->vbus_supply, false);
if (ret) {
dev_err(dev, "Error disabling vbus supply\n");
return ret;
}
}
return 0;
}
#else
static int dwc_vbus_supply_init(struct udevice *dev)
{
return 0;
}
#if CONFIG_IS_ENABLED(DM_USB)
static int dwc_vbus_supply_exit(struct udevice *dev)
{
return 0;
}
#endif
#endif
/*
* This function initializes the DWC_otg controller registers for
* host mode.
*
* This function flushes the Tx and Rx FIFOs and it flushes any entries in the
* request queues. Host channels are reset to ensure that they are ready for
* performing transfers.
*
* @param dev USB Device (NULL if driver model is not being used)
* @param regs Programming view of DWC_otg controller
*
*/
static void dwc_otg_core_host_init(struct udevice *dev,
struct dwc2_core_regs *regs)
{
uint32_t nptxfifosize = 0;
uint32_t ptxfifosize = 0;
uint32_t hprt0 = 0;
int i, ret, num_channels;
/* Restart the Phy Clock */
writel(0, &regs->pcgcctl);
/* Initialize Host Configuration Register */
init_fslspclksel(regs);
#ifdef CONFIG_DWC2_DFLT_SPEED_FULL
setbits_le32(&regs->host_regs.hcfg, DWC2_HCFG_FSLSSUPP);
#endif
/* Configure data FIFO sizes */
#ifdef CONFIG_DWC2_ENABLE_DYNAMIC_FIFO
if (readl(&regs->ghwcfg2) & DWC2_HWCFG2_DYNAMIC_FIFO) {
/* Rx FIFO */
writel(CONFIG_DWC2_HOST_RX_FIFO_SIZE, &regs->grxfsiz);
/* Non-periodic Tx FIFO */
nptxfifosize |= CONFIG_DWC2_HOST_NPERIO_TX_FIFO_SIZE <<
DWC2_FIFOSIZE_DEPTH_OFFSET;
nptxfifosize |= CONFIG_DWC2_HOST_RX_FIFO_SIZE <<
DWC2_FIFOSIZE_STARTADDR_OFFSET;
writel(nptxfifosize, &regs->gnptxfsiz);
/* Periodic Tx FIFO */
ptxfifosize |= CONFIG_DWC2_HOST_PERIO_TX_FIFO_SIZE <<
DWC2_FIFOSIZE_DEPTH_OFFSET;
ptxfifosize |= (CONFIG_DWC2_HOST_RX_FIFO_SIZE +
CONFIG_DWC2_HOST_NPERIO_TX_FIFO_SIZE) <<
DWC2_FIFOSIZE_STARTADDR_OFFSET;
writel(ptxfifosize, &regs->hptxfsiz);
}
#endif
/* Clear Host Set HNP Enable in the OTG Control Register */
clrbits_le32(&regs->gotgctl, DWC2_GOTGCTL_HSTSETHNPEN);
/* Make sure the FIFOs are flushed. */
dwc_otg_flush_tx_fifo(dev, regs, 0x10); /* All Tx FIFOs */
dwc_otg_flush_rx_fifo(dev, regs);
/* Flush out any leftover queued requests. */
num_channels = readl(&regs->ghwcfg2);
num_channels &= DWC2_HWCFG2_NUM_HOST_CHAN_MASK;
num_channels >>= DWC2_HWCFG2_NUM_HOST_CHAN_OFFSET;
num_channels += 1;
for (i = 0; i < num_channels; i++)
clrsetbits_le32(&regs->hc_regs[i].hcchar,
DWC2_HCCHAR_CHEN | DWC2_HCCHAR_EPDIR,
DWC2_HCCHAR_CHDIS);
/* Halt all channels to put them into a known state. */
for (i = 0; i < num_channels; i++) {
clrsetbits_le32(&regs->hc_regs[i].hcchar,
DWC2_HCCHAR_EPDIR,
DWC2_HCCHAR_CHEN | DWC2_HCCHAR_CHDIS);
ret = wait_for_bit_le32(&regs->hc_regs[i].hcchar,
DWC2_HCCHAR_CHEN, false, 1000, false);
if (ret)
dev_info(dev, "%s: Timeout!\n", __func__);
}
/* Turn on the vbus power. */
if (readl(&regs->gintsts) & DWC2_GINTSTS_CURMODE_HOST) {
hprt0 = readl(&regs->hprt0);
hprt0 &= ~(DWC2_HPRT0_PRTENA | DWC2_HPRT0_PRTCONNDET);
hprt0 &= ~(DWC2_HPRT0_PRTENCHNG | DWC2_HPRT0_PRTOVRCURRCHNG);
if (!(hprt0 & DWC2_HPRT0_PRTPWR)) {
hprt0 |= DWC2_HPRT0_PRTPWR;
writel(hprt0, &regs->hprt0);
}
}
if (dev)
dwc_vbus_supply_init(dev);
}
/*
* This function initializes the DWC_otg controller registers and
* prepares the core for device mode or host mode operation.
*
* @param regs Programming view of the DWC_otg controller
*/
static void dwc_otg_core_init(struct udevice *dev)
{
struct dwc2_priv *priv = dev_get_priv(dev);
struct dwc2_core_regs *regs = priv->regs;
uint32_t ahbcfg = 0;
uint32_t usbcfg = 0;
uint8_t brst_sz = CONFIG_DWC2_DMA_BURST_SIZE;
/* Common Initialization */
usbcfg = readl(&regs->gusbcfg);
/* Program the ULPI External VBUS bit if needed */
if (priv->ext_vbus) {
usbcfg |= DWC2_GUSBCFG_ULPI_EXT_VBUS_DRV;
if (!priv->oc_disable) {
usbcfg |= DWC2_GUSBCFG_ULPI_INT_VBUS_INDICATOR |
DWC2_GUSBCFG_INDICATOR_PASSTHROUGH;
}
} else {
usbcfg &= ~DWC2_GUSBCFG_ULPI_EXT_VBUS_DRV;
}
/* Set external TS Dline pulsing */
#ifdef CONFIG_DWC2_TS_DLINE
usbcfg |= DWC2_GUSBCFG_TERM_SEL_DL_PULSE;
#else
usbcfg &= ~DWC2_GUSBCFG_TERM_SEL_DL_PULSE;
#endif
writel(usbcfg, &regs->gusbcfg);
/* Reset the Controller */
dwc_otg_core_reset(dev, regs);
/*
* This programming sequence needs to happen in FS mode before
* any other programming occurs
*/
#if defined(CONFIG_DWC2_DFLT_SPEED_FULL) && \
(CONFIG_DWC2_PHY_TYPE == DWC2_PHY_TYPE_FS)
/* If FS mode with FS PHY */
setbits_le32(&regs->gusbcfg, DWC2_GUSBCFG_PHYSEL);
/* Reset after a PHY select */
dwc_otg_core_reset(dev, regs);
/*
* Program DCFG.DevSpd or HCFG.FSLSPclkSel to 48Mhz in FS.
* Also do this on HNP Dev/Host mode switches (done in dev_init
* and host_init).
*/
if (readl(&regs->gintsts) & DWC2_GINTSTS_CURMODE_HOST)
init_fslspclksel(regs);
#ifdef CONFIG_DWC2_I2C_ENABLE
/* Program GUSBCFG.OtgUtmifsSel to I2C */
setbits_le32(&regs->gusbcfg, DWC2_GUSBCFG_OTGUTMIFSSEL);
/* Program GI2CCTL.I2CEn */
clrsetbits_le32(&regs->gi2cctl, DWC2_GI2CCTL_I2CEN |
DWC2_GI2CCTL_I2CDEVADDR_MASK,
1 << DWC2_GI2CCTL_I2CDEVADDR_OFFSET);
setbits_le32(&regs->gi2cctl, DWC2_GI2CCTL_I2CEN);
#endif
#else
/* High speed PHY. */
/*
* HS PHY parameters. These parameters are preserved during
* soft reset so only program the first time. Do a soft reset
* immediately after setting phyif.
*/
usbcfg &= ~(DWC2_GUSBCFG_ULPI_UTMI_SEL | DWC2_GUSBCFG_PHYIF);
usbcfg |= CONFIG_DWC2_PHY_TYPE << DWC2_GUSBCFG_ULPI_UTMI_SEL_OFFSET;
if (usbcfg & DWC2_GUSBCFG_ULPI_UTMI_SEL) { /* ULPI interface */
#ifdef CONFIG_DWC2_PHY_ULPI_DDR
usbcfg |= DWC2_GUSBCFG_DDRSEL;
#else
usbcfg &= ~DWC2_GUSBCFG_DDRSEL;
#endif
} else { /* UTMI+ interface */
#if (CONFIG_DWC2_UTMI_WIDTH == 16)
usbcfg |= DWC2_GUSBCFG_PHYIF;
#endif
}
writel(usbcfg, &regs->gusbcfg);
/* Reset after setting the PHY parameters */
dwc_otg_core_reset(dev, regs);
#endif
usbcfg = readl(&regs->gusbcfg);
usbcfg &= ~(DWC2_GUSBCFG_ULPI_FSLS | DWC2_GUSBCFG_ULPI_CLK_SUS_M);
#ifdef CONFIG_DWC2_ULPI_FS_LS
uint32_t hwcfg2 = readl(&regs->ghwcfg2);
uint32_t hval = (ghwcfg2 & DWC2_HWCFG2_HS_PHY_TYPE_MASK) >>
DWC2_HWCFG2_HS_PHY_TYPE_OFFSET;
uint32_t fval = (ghwcfg2 & DWC2_HWCFG2_FS_PHY_TYPE_MASK) >>
DWC2_HWCFG2_FS_PHY_TYPE_OFFSET;
if (hval == 2 && fval == 1) {
usbcfg |= DWC2_GUSBCFG_ULPI_FSLS;
usbcfg |= DWC2_GUSBCFG_ULPI_CLK_SUS_M;
}
#endif
if (priv->hnp_srp_disable)
usbcfg |= DWC2_GUSBCFG_FORCEHOSTMODE;
writel(usbcfg, &regs->gusbcfg);
/* Program the GAHBCFG Register. */
switch (readl(&regs->ghwcfg2) & DWC2_HWCFG2_ARCHITECTURE_MASK) {
case DWC2_HWCFG2_ARCHITECTURE_SLAVE_ONLY:
break;
case DWC2_HWCFG2_ARCHITECTURE_EXT_DMA:
while (brst_sz > 1) {
ahbcfg |= ahbcfg + (1 << DWC2_GAHBCFG_HBURSTLEN_OFFSET);
ahbcfg &= DWC2_GAHBCFG_HBURSTLEN_MASK;
brst_sz >>= 1;
}
#ifdef CONFIG_DWC2_DMA_ENABLE
ahbcfg |= DWC2_GAHBCFG_DMAENABLE;
#endif
break;
case DWC2_HWCFG2_ARCHITECTURE_INT_DMA:
ahbcfg |= DWC2_GAHBCFG_HBURSTLEN_INCR4;
#ifdef CONFIG_DWC2_DMA_ENABLE
ahbcfg |= DWC2_GAHBCFG_DMAENABLE;
#endif
break;
}
writel(ahbcfg, &regs->gahbcfg);
/* Program the capabilities in GUSBCFG Register */
usbcfg = 0;
if (!priv->hnp_srp_disable)
usbcfg |= DWC2_GUSBCFG_HNPCAP | DWC2_GUSBCFG_SRPCAP;
#ifdef CONFIG_DWC2_IC_USB_CAP
usbcfg |= DWC2_GUSBCFG_IC_USB_CAP;
#endif
setbits_le32(&regs->gusbcfg, usbcfg);
}
/*
* Prepares a host channel for transferring packets to/from a specific
* endpoint. The HCCHARn register is set up with the characteristics specified
* in _hc. Host channel interrupts that may need to be serviced while this
* transfer is in progress are enabled.
*
* @param regs Programming view of DWC_otg controller
* @param hc Information needed to initialize the host channel
*/
static void dwc_otg_hc_init(struct dwc2_core_regs *regs, uint8_t hc_num,
struct usb_device *dev, uint8_t dev_addr, uint8_t ep_num,
uint8_t ep_is_in, uint8_t ep_type, uint16_t max_packet)
{
struct dwc2_hc_regs *hc_regs = &regs->hc_regs[hc_num];
uint32_t hcchar = (dev_addr << DWC2_HCCHAR_DEVADDR_OFFSET) |
(ep_num << DWC2_HCCHAR_EPNUM_OFFSET) |
(ep_is_in << DWC2_HCCHAR_EPDIR_OFFSET) |
(ep_type << DWC2_HCCHAR_EPTYPE_OFFSET) |
(max_packet << DWC2_HCCHAR_MPS_OFFSET);
if (dev->speed == USB_SPEED_LOW)
hcchar |= DWC2_HCCHAR_LSPDDEV;
/*
* Program the HCCHARn register with the endpoint characteristics
* for the current transfer.
*/
writel(hcchar, &hc_regs->hcchar);
/* Program the HCSPLIT register, default to no SPLIT */
writel(0, &hc_regs->hcsplt);
}
static void dwc_otg_hc_init_split(struct dwc2_hc_regs *hc_regs,
uint8_t hub_devnum, uint8_t hub_port)
{
uint32_t hcsplt = 0;
hcsplt = DWC2_HCSPLT_SPLTENA;
hcsplt |= hub_devnum << DWC2_HCSPLT_HUBADDR_OFFSET;
hcsplt |= hub_port << DWC2_HCSPLT_PRTADDR_OFFSET;
/* Program the HCSPLIT register for SPLITs */
writel(hcsplt, &hc_regs->hcsplt);
}
/*
* DWC2 to USB API interface
*/
/* Direction: In ; Request: Status */
static int dwc_otg_submit_rh_msg_in_status(struct dwc2_core_regs *regs,
struct usb_device *dev, void *buffer,
int txlen, struct devrequest *cmd)
{
uint32_t hprt0 = 0;
uint32_t port_status = 0;
uint32_t port_change = 0;
int len = 0;
int stat = 0;
switch (cmd->requesttype & ~USB_DIR_IN) {
case 0:
*(uint16_t *)buffer = cpu_to_le16(1);
len = 2;
break;
case USB_RECIP_INTERFACE:
case USB_RECIP_ENDPOINT:
*(uint16_t *)buffer = cpu_to_le16(0);
len = 2;
break;
case USB_TYPE_CLASS:
*(uint32_t *)buffer = cpu_to_le32(0);
len = 4;
break;
case USB_RECIP_OTHER | USB_TYPE_CLASS:
hprt0 = readl(&regs->hprt0);
if (hprt0 & DWC2_HPRT0_PRTCONNSTS)
port_status |= USB_PORT_STAT_CONNECTION;
if (hprt0 & DWC2_HPRT0_PRTENA)
port_status |= USB_PORT_STAT_ENABLE;
if (hprt0 & DWC2_HPRT0_PRTSUSP)
port_status |= USB_PORT_STAT_SUSPEND;
if (hprt0 & DWC2_HPRT0_PRTOVRCURRACT)
port_status |= USB_PORT_STAT_OVERCURRENT;
if (hprt0 & DWC2_HPRT0_PRTRST)
port_status |= USB_PORT_STAT_RESET;
if (hprt0 & DWC2_HPRT0_PRTPWR)
port_status |= USB_PORT_STAT_POWER;
if ((hprt0 & DWC2_HPRT0_PRTSPD_MASK) == DWC2_HPRT0_PRTSPD_LOW)
port_status |= USB_PORT_STAT_LOW_SPEED;
else if ((hprt0 & DWC2_HPRT0_PRTSPD_MASK) ==
DWC2_HPRT0_PRTSPD_HIGH)
port_status |= USB_PORT_STAT_HIGH_SPEED;
if (hprt0 & DWC2_HPRT0_PRTENCHNG)
port_change |= USB_PORT_STAT_C_ENABLE;
if (hprt0 & DWC2_HPRT0_PRTCONNDET)
port_change |= USB_PORT_STAT_C_CONNECTION;
if (hprt0 & DWC2_HPRT0_PRTOVRCURRCHNG)
port_change |= USB_PORT_STAT_C_OVERCURRENT;
*(uint32_t *)buffer = cpu_to_le32(port_status |
(port_change << 16));
len = 4;
break;
default:
puts("unsupported root hub command\n");
stat = USB_ST_STALLED;
}
dev->act_len = min(len, txlen);
dev->status = stat;
return stat;
}
/* Direction: In ; Request: Descriptor */
static int dwc_otg_submit_rh_msg_in_descriptor(struct usb_device *dev,
void *buffer, int txlen,
struct devrequest *cmd)
{
unsigned char data[32];
uint32_t dsc;
int len = 0;
int stat = 0;
uint16_t wValue = cpu_to_le16(cmd->value);
uint16_t wLength = cpu_to_le16(cmd->length);
switch (cmd->requesttype & ~USB_DIR_IN) {
case 0:
switch (wValue & 0xff00) {
case 0x0100: /* device descriptor */
len = min3(txlen, (int)sizeof(root_hub_dev_des), (int)wLength);
memcpy(buffer, root_hub_dev_des, len);
break;
case 0x0200: /* configuration descriptor */
len = min3(txlen, (int)sizeof(root_hub_config_des), (int)wLength);
memcpy(buffer, root_hub_config_des, len);
break;
case 0x0300: /* string descriptors */
switch (wValue & 0xff) {
case 0x00:
len = min3(txlen, (int)sizeof(root_hub_str_index0),
(int)wLength);
memcpy(buffer, root_hub_str_index0, len);
break;
case 0x01:
len = min3(txlen, (int)sizeof(root_hub_str_index1),
(int)wLength);
memcpy(buffer, root_hub_str_index1, len);
break;
}
break;
default:
stat = USB_ST_STALLED;
}
break;
case USB_TYPE_CLASS:
/* Root port config, set 1 port and nothing else. */
dsc = 0x00000001;
data[0] = 9; /* min length; */
data[1] = 0x29;
data[2] = dsc & RH_A_NDP;
data[3] = 0;
if (dsc & RH_A_PSM)
data[3] |= 0x1;
if (dsc & RH_A_NOCP)
data[3] |= 0x10;
else if (dsc & RH_A_OCPM)
data[3] |= 0x8;
/* corresponds to data[4-7] */
data[5] = (dsc & RH_A_POTPGT) >> 24;
data[7] = dsc & RH_B_DR;
if (data[2] < 7) {
data[8] = 0xff;
} else {
data[0] += 2;
data[8] = (dsc & RH_B_DR) >> 8;
data[9] = 0xff;
data[10] = data[9];
}
len = min3(txlen, (int)data[0], (int)wLength);
memcpy(buffer, data, len);
break;
default:
puts("unsupported root hub command\n");
stat = USB_ST_STALLED;
}
dev->act_len = min(len, txlen);
dev->status = stat;
return stat;
}
/* Direction: In ; Request: Configuration */
static int dwc_otg_submit_rh_msg_in_configuration(struct usb_device *dev,
void *buffer, int txlen,
struct devrequest *cmd)
{
int len = 0;
int stat = 0;
switch (cmd->requesttype & ~USB_DIR_IN) {
case 0:
*(uint8_t *)buffer = 0x01;
len = 1;
break;
default:
puts("unsupported root hub command\n");
stat = USB_ST_STALLED;
}
dev->act_len = min(len, txlen);
dev->status = stat;
return stat;
}
/* Direction: In */
static int dwc_otg_submit_rh_msg_in(struct dwc2_priv *priv,
struct usb_device *dev, void *buffer,
int txlen, struct devrequest *cmd)
{
switch (cmd->request) {
case USB_REQ_GET_STATUS:
return dwc_otg_submit_rh_msg_in_status(priv->regs, dev, buffer,
txlen, cmd);
case USB_REQ_GET_DESCRIPTOR:
return dwc_otg_submit_rh_msg_in_descriptor(dev, buffer,
txlen, cmd);
case USB_REQ_GET_CONFIGURATION:
return dwc_otg_submit_rh_msg_in_configuration(dev, buffer,
txlen, cmd);
default:
puts("unsupported root hub command\n");
return USB_ST_STALLED;
}
}
/* Direction: Out */
static int dwc_otg_submit_rh_msg_out(struct dwc2_priv *priv,
struct usb_device *dev,
void *buffer, int txlen,
struct devrequest *cmd)
{
struct dwc2_core_regs *regs = priv->regs;
int len = 0;
int stat = 0;
uint16_t bmrtype_breq = cmd->requesttype | (cmd->request << 8);
uint16_t wValue = cpu_to_le16(cmd->value);
switch (bmrtype_breq & ~USB_DIR_IN) {
case (USB_REQ_CLEAR_FEATURE << 8) | USB_RECIP_ENDPOINT:
case (USB_REQ_CLEAR_FEATURE << 8) | USB_TYPE_CLASS:
break;
case (USB_REQ_CLEAR_FEATURE << 8) | USB_RECIP_OTHER | USB_TYPE_CLASS:
switch (wValue) {
case USB_PORT_FEAT_C_CONNECTION:
setbits_le32(&regs->hprt0, DWC2_HPRT0_PRTCONNDET);
break;
}
break;
case (USB_REQ_SET_FEATURE << 8) | USB_RECIP_OTHER | USB_TYPE_CLASS:
switch (wValue) {
case USB_PORT_FEAT_SUSPEND:
break;
case USB_PORT_FEAT_RESET:
clrsetbits_le32(&regs->hprt0, DWC2_HPRT0_PRTENA |
DWC2_HPRT0_PRTCONNDET |
DWC2_HPRT0_PRTENCHNG |
DWC2_HPRT0_PRTOVRCURRCHNG,
DWC2_HPRT0_PRTRST);
mdelay(50);
clrbits_le32(&regs->hprt0, DWC2_HPRT0_PRTRST);
break;
case USB_PORT_FEAT_POWER:
clrsetbits_le32(&regs->hprt0, DWC2_HPRT0_PRTENA |
DWC2_HPRT0_PRTCONNDET |
DWC2_HPRT0_PRTENCHNG |
DWC2_HPRT0_PRTOVRCURRCHNG,
DWC2_HPRT0_PRTRST);
break;
case USB_PORT_FEAT_ENABLE:
break;
}
break;
case (USB_REQ_SET_ADDRESS << 8):
priv->root_hub_devnum = wValue;
break;
case (USB_REQ_SET_CONFIGURATION << 8):
break;
default:
puts("unsupported root hub command\n");
stat = USB_ST_STALLED;
}
len = min(len, txlen);
dev->act_len = len;
dev->status = stat;
return stat;
}
static int dwc_otg_submit_rh_msg(struct dwc2_priv *priv, struct usb_device *dev,
unsigned long pipe, void *buffer, int txlen,
struct devrequest *cmd)
{
int stat = 0;
if (usb_pipeint(pipe)) {
puts("Root-Hub submit IRQ: NOT implemented\n");
return 0;
}
if (cmd->requesttype & USB_DIR_IN)
stat = dwc_otg_submit_rh_msg_in(priv, dev, buffer, txlen, cmd);
else
stat = dwc_otg_submit_rh_msg_out(priv, dev, buffer, txlen, cmd);
mdelay(1);
return stat;
}
int wait_for_chhltd(struct dwc2_hc_regs *hc_regs, uint32_t *sub, u8 *toggle)
{
int ret;
uint32_t hcint, hctsiz;
ret = wait_for_bit_le32(&hc_regs->hcint, DWC2_HCINT_CHHLTD, true,
2000, false);
if (ret)
return ret;
hcint = readl(&hc_regs->hcint);
hctsiz = readl(&hc_regs->hctsiz);
*sub = (hctsiz & DWC2_HCTSIZ_XFERSIZE_MASK) >>
DWC2_HCTSIZ_XFERSIZE_OFFSET;
*toggle = (hctsiz & DWC2_HCTSIZ_PID_MASK) >> DWC2_HCTSIZ_PID_OFFSET;
debug("%s: HCINT=%08x sub=%u toggle=%d\n", __func__, hcint, *sub,
*toggle);
if (hcint & DWC2_HCINT_XFERCOMP)
return 0;
if (hcint & (DWC2_HCINT_NAK | DWC2_HCINT_FRMOVRUN))
return -EAGAIN;
debug("%s: Error (HCINT=%08x)\n", __func__, hcint);
return -EINVAL;
}
static int dwc2_eptype[] = {
DWC2_HCCHAR_EPTYPE_ISOC,
DWC2_HCCHAR_EPTYPE_INTR,
DWC2_HCCHAR_EPTYPE_CONTROL,
DWC2_HCCHAR_EPTYPE_BULK,
};
static int transfer_chunk(struct dwc2_hc_regs *hc_regs, void *aligned_buffer,
u8 *pid, int in, void *buffer, int num_packets,
int xfer_len, int *actual_len, int odd_frame)
{
int ret = 0;
uint32_t sub;
debug("%s: chunk: pid %d xfer_len %u pkts %u\n", __func__,
*pid, xfer_len, num_packets);
writel((xfer_len << DWC2_HCTSIZ_XFERSIZE_OFFSET) |
(num_packets << DWC2_HCTSIZ_PKTCNT_OFFSET) |
(*pid << DWC2_HCTSIZ_PID_OFFSET),
&hc_regs->hctsiz);
if (xfer_len) {
if (in) {
invalidate_dcache_range(
(uintptr_t)aligned_buffer,
(uintptr_t)aligned_buffer +
roundup(xfer_len, ARCH_DMA_MINALIGN));
} else {
memcpy(aligned_buffer, buffer, xfer_len);
flush_dcache_range(
(uintptr_t)aligned_buffer,
(uintptr_t)aligned_buffer +
roundup(xfer_len, ARCH_DMA_MINALIGN));
}
}
writel(phys_to_bus((unsigned long)aligned_buffer), &hc_regs->hcdma);
/* Clear old interrupt conditions for this host channel. */
writel(0x3fff, &hc_regs->hcint);
/* Set host channel enable after all other setup is complete. */
clrsetbits_le32(&hc_regs->hcchar, DWC2_HCCHAR_MULTICNT_MASK |
DWC2_HCCHAR_CHEN | DWC2_HCCHAR_CHDIS |
DWC2_HCCHAR_ODDFRM,
(1 << DWC2_HCCHAR_MULTICNT_OFFSET) |
(odd_frame << DWC2_HCCHAR_ODDFRM_OFFSET) |
DWC2_HCCHAR_CHEN);
ret = wait_for_chhltd(hc_regs, &sub, pid);
if (ret < 0)
return ret;
if (in) {
xfer_len -= sub;
invalidate_dcache_range((unsigned long)aligned_buffer,
(unsigned long)aligned_buffer +
roundup(xfer_len, ARCH_DMA_MINALIGN));
memcpy(buffer, aligned_buffer, xfer_len);
}
*actual_len = xfer_len;
return ret;
}
int chunk_msg(struct dwc2_priv *priv, struct usb_device *dev,
unsigned long pipe, u8 *pid, int in, void *buffer, int len)
{
struct dwc2_core_regs *regs = priv->regs;
struct dwc2_hc_regs *hc_regs = &regs->hc_regs[DWC2_HC_CHANNEL];
struct dwc2_host_regs *host_regs = &regs->host_regs;
int devnum = usb_pipedevice(pipe);
int ep = usb_pipeendpoint(pipe);
int max = usb_maxpacket(dev, pipe);
int eptype = dwc2_eptype[usb_pipetype(pipe)];
int done = 0;
int ret = 0;
int do_split = 0;
int complete_split = 0;
uint32_t xfer_len;
uint32_t num_packets;
int stop_transfer = 0;
uint32_t max_xfer_len;
int ssplit_frame_num = 0;
debug("%s: msg: pipe %lx pid %d in %d len %d\n", __func__, pipe, *pid,
in, len);
max_xfer_len = CONFIG_DWC2_MAX_PACKET_COUNT * max;
if (max_xfer_len > CONFIG_DWC2_MAX_TRANSFER_SIZE)
max_xfer_len = CONFIG_DWC2_MAX_TRANSFER_SIZE;
if (max_xfer_len > DWC2_DATA_BUF_SIZE)
max_xfer_len = DWC2_DATA_BUF_SIZE;
/* Make sure that max_xfer_len is a multiple of max packet size. */
num_packets = max_xfer_len / max;
max_xfer_len = num_packets * max;
/* Initialize channel */
dwc_otg_hc_init(regs, DWC2_HC_CHANNEL, dev, devnum, ep, in,
eptype, max);
/* Check if the target is a FS/LS device behind a HS hub */
if (dev->speed != USB_SPEED_HIGH) {
uint8_t hub_addr;
uint8_t hub_port;
uint32_t hprt0 = readl(&regs->hprt0);
if ((hprt0 & DWC2_HPRT0_PRTSPD_MASK) ==
DWC2_HPRT0_PRTSPD_HIGH) {
usb_find_usb2_hub_address_port(dev, &hub_addr,
&hub_port);
dwc_otg_hc_init_split(hc_regs, hub_addr, hub_port);
do_split = 1;
num_packets = 1;
max_xfer_len = max;
}
}
do {
int actual_len = 0;
uint32_t hcint;
int odd_frame = 0;
xfer_len = len - done;
if (xfer_len > max_xfer_len)
xfer_len = max_xfer_len;
else if (xfer_len > max)
num_packets = (xfer_len + max - 1) / max;
else
num_packets = 1;
if (complete_split)
setbits_le32(&hc_regs->hcsplt, DWC2_HCSPLT_COMPSPLT);
else if (do_split)
clrbits_le32(&hc_regs->hcsplt, DWC2_HCSPLT_COMPSPLT);
if (eptype == DWC2_HCCHAR_EPTYPE_INTR) {
int uframe_num = readl(&host_regs->hfnum);
if (!(uframe_num & 0x1))
odd_frame = 1;
}
ret = transfer_chunk(hc_regs, priv->aligned_buffer, pid,
in, (char *)buffer + done, num_packets,
xfer_len, &actual_len, odd_frame);
hcint = readl(&hc_regs->hcint);
if (complete_split) {
stop_transfer = 0;
if (hcint & DWC2_HCINT_NYET) {
ret = 0;
int frame_num = DWC2_HFNUM_MAX_FRNUM &
readl(&host_regs->hfnum);
if (((frame_num - ssplit_frame_num) &
DWC2_HFNUM_MAX_FRNUM) > 4)
ret = -EAGAIN;
} else
complete_split = 0;
} else if (do_split) {
if (hcint & DWC2_HCINT_ACK) {
ssplit_frame_num = DWC2_HFNUM_MAX_FRNUM &
readl(&host_regs->hfnum);
ret = 0;
complete_split = 1;
}
}
if (ret)
break;
if (actual_len < xfer_len)
stop_transfer = 1;
done += actual_len;
/* Transactions are done when when either all data is transferred or
* there is a short transfer. In case of a SPLIT make sure the CSPLIT
* is executed.
*/
} while (((done < len) && !stop_transfer) || complete_split);
writel(0, &hc_regs->hcintmsk);
writel(0xFFFFFFFF, &hc_regs->hcint);
dev->status = 0;
dev->act_len = done;
return ret;
}
/* U-Boot USB transmission interface */
int _submit_bulk_msg(struct dwc2_priv *priv, struct usb_device *dev,
unsigned long pipe, void *buffer, int len)
{
int devnum = usb_pipedevice(pipe);
int ep = usb_pipeendpoint(pipe);
u8* pid;
if ((devnum >= MAX_DEVICE) || (devnum == priv->root_hub_devnum)) {
dev->status = 0;
return -EINVAL;
}
if (usb_pipein(pipe))
pid = &priv->in_data_toggle[devnum][ep];
else
pid = &priv->out_data_toggle[devnum][ep];
return chunk_msg(priv, dev, pipe, pid, usb_pipein(pipe), buffer, len);
}
static int _submit_control_msg(struct dwc2_priv *priv, struct usb_device *dev,
unsigned long pipe, void *buffer, int len,
struct devrequest *setup)
{
int devnum = usb_pipedevice(pipe);
int ret, act_len;
u8 pid;
/* For CONTROL endpoint pid should start with DATA1 */
int status_direction;
if (devnum == priv->root_hub_devnum) {
dev->status = 0;
dev->speed = USB_SPEED_HIGH;
return dwc_otg_submit_rh_msg(priv, dev, pipe, buffer, len,
setup);
}
/* SETUP stage */
pid = DWC2_HC_PID_SETUP;
do {
ret = chunk_msg(priv, dev, pipe, &pid, 0, setup, 8);
} while (ret == -EAGAIN);
if (ret)
return ret;
/* DATA stage */
act_len = 0;
if (buffer) {
pid = DWC2_HC_PID_DATA1;
do {
ret = chunk_msg(priv, dev, pipe, &pid, usb_pipein(pipe),
buffer, len);
act_len += dev->act_len;
buffer += dev->act_len;
len -= dev->act_len;
} while (ret == -EAGAIN);
if (ret)
return ret;
status_direction = usb_pipeout(pipe);
} else {
/* No-data CONTROL always ends with an IN transaction */
status_direction = 1;
}
/* STATUS stage */
pid = DWC2_HC_PID_DATA1;
do {
ret = chunk_msg(priv, dev, pipe, &pid, status_direction,
priv->status_buffer, 0);
} while (ret == -EAGAIN);
if (ret)
return ret;
dev->act_len = act_len;
return 0;
}
int _submit_int_msg(struct dwc2_priv *priv, struct usb_device *dev,
unsigned long pipe, void *buffer, int len, int interval,
bool nonblock)
{
unsigned long timeout;
int ret;
/* FIXME: what is interval? */
timeout = get_timer(0) + USB_TIMEOUT_MS(pipe);
for (;;) {
if (get_timer(0) > timeout) {
#if CONFIG_IS_ENABLED(DM_USB)
dev_err(dev->dev,
"Timeout poll on interrupt endpoint\n");
#else
log_err("Timeout poll on interrupt endpoint\n");
#endif
return -ETIMEDOUT;
}
ret = _submit_bulk_msg(priv, dev, pipe, buffer, len);
if ((ret != -EAGAIN) || nonblock)
return ret;
}
}
static int dwc2_reset(struct udevice *dev)
{
int ret;
struct dwc2_priv *priv = dev_get_priv(dev);
ret = reset_get_bulk(dev, &priv->resets);
if (ret) {
dev_warn(dev, "Can't get reset: %d\n", ret);
/* Return 0 if error due to !CONFIG_DM_RESET and reset
* DT property is not present.
*/
if (ret == -ENOENT || ret == -ENOTSUPP)
return 0;
else
return ret;
}
/* force reset to clear all IP register */
reset_assert_bulk(&priv->resets);
ret = reset_deassert_bulk(&priv->resets);
if (ret) {
reset_release_bulk(&priv->resets);
dev_err(dev, "Failed to reset: %d\n", ret);
return ret;
}
return 0;
}
static int dwc2_init_common(struct udevice *dev, struct dwc2_priv *priv)
{
struct dwc2_core_regs *regs = priv->regs;
uint32_t snpsid;
int i, j;
int ret;
ret = dwc2_reset(dev);
if (ret)
return ret;
snpsid = readl(&regs->gsnpsid);
dev_info(dev, "Core Release: %x.%03x\n",
snpsid >> 12 & 0xf, snpsid & 0xfff);
if ((snpsid & DWC2_SNPSID_DEVID_MASK) != DWC2_SNPSID_DEVID_VER_2xx &&
(snpsid & DWC2_SNPSID_DEVID_MASK) != DWC2_SNPSID_DEVID_VER_3xx) {
dev_info(dev, "SNPSID invalid (not DWC2 OTG device): %08x\n",
snpsid);
return -ENODEV;
}
#ifdef CONFIG_DWC2_PHY_ULPI_EXT_VBUS
priv->ext_vbus = 1;
#else
priv->ext_vbus = 0;
#endif
dwc_otg_core_init(dev);
if (usb_get_dr_mode(dev_ofnode(dev)) == USB_DR_MODE_PERIPHERAL) {
dev_dbg(dev, "USB device %s dr_mode set to %d. Skipping host_init.\n",
dev->name, usb_get_dr_mode(dev_ofnode(dev)));
} else {
dwc_otg_core_host_init(dev, regs);
}
clrsetbits_le32(&regs->hprt0, DWC2_HPRT0_PRTENA |
DWC2_HPRT0_PRTCONNDET | DWC2_HPRT0_PRTENCHNG |
DWC2_HPRT0_PRTOVRCURRCHNG,
DWC2_HPRT0_PRTRST);
mdelay(50);
clrbits_le32(&regs->hprt0, DWC2_HPRT0_PRTENA | DWC2_HPRT0_PRTCONNDET |
DWC2_HPRT0_PRTENCHNG | DWC2_HPRT0_PRTOVRCURRCHNG |
DWC2_HPRT0_PRTRST);
for (i = 0; i < MAX_DEVICE; i++) {
for (j = 0; j < MAX_ENDPOINT; j++) {
priv->in_data_toggle[i][j] = DWC2_HC_PID_DATA0;
priv->out_data_toggle[i][j] = DWC2_HC_PID_DATA0;
}
}
/*
* Add a 1 second delay here. This gives the host controller
* a bit time before the comminucation with the USB devices
* is started (the bus is scanned) and fixes the USB detection
* problems with some problematic USB keys.
*/
if (readl(&regs->gintsts) & DWC2_GINTSTS_CURMODE_HOST)
mdelay(1000);
printf("USB DWC2\n");
return 0;
}
static void dwc2_uninit_common(struct dwc2_core_regs *regs)
{
/* Put everything in reset. */
clrsetbits_le32(&regs->hprt0, DWC2_HPRT0_PRTENA |
DWC2_HPRT0_PRTCONNDET | DWC2_HPRT0_PRTENCHNG |
DWC2_HPRT0_PRTOVRCURRCHNG,
DWC2_HPRT0_PRTRST);
}
#if !CONFIG_IS_ENABLED(DM_USB)
int submit_control_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
int len, struct devrequest *setup)
{
return _submit_control_msg(&local, dev, pipe, buffer, len, setup);
}
int submit_bulk_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
int len)
{
return _submit_bulk_msg(&local, dev, pipe, buffer, len);
}
int submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
int len, int interval, bool nonblock)
{
return _submit_int_msg(&local, dev, pipe, buffer, len, interval,
nonblock);
}
/* U-Boot USB control interface */
int usb_lowlevel_init(int index, enum usb_init_type init, void **controller)
{
struct dwc2_priv *priv = &local;
memset(priv, '\0', sizeof(*priv));
priv->root_hub_devnum = 0;
priv->regs = (struct dwc2_core_regs *)CONFIG_USB_DWC2_REG_ADDR;
priv->aligned_buffer = aligned_buffer_addr;
priv->status_buffer = status_buffer_addr;
/* board-dependant init */
if (board_usb_init(index, USB_INIT_HOST))
return -1;
return dwc2_init_common(NULL, priv);
}
int usb_lowlevel_stop(int index)
{
dwc2_uninit_common(local.regs);
return 0;
}
#endif
#if CONFIG_IS_ENABLED(DM_USB)
static int dwc2_submit_control_msg(struct udevice *dev, struct usb_device *udev,
unsigned long pipe, void *buffer, int length,
struct devrequest *setup)
{
struct dwc2_priv *priv = dev_get_priv(dev);
debug("%s: dev='%s', udev=%p, udev->dev='%s', portnr=%d\n", __func__,
dev->name, udev, udev->dev->name, udev->portnr);
return _submit_control_msg(priv, udev, pipe, buffer, length, setup);
}
static int dwc2_submit_bulk_msg(struct udevice *dev, struct usb_device *udev,
unsigned long pipe, void *buffer, int length)
{
struct dwc2_priv *priv = dev_get_priv(dev);
debug("%s: dev='%s', udev=%p\n", __func__, dev->name, udev);
return _submit_bulk_msg(priv, udev, pipe, buffer, length);
}
static int dwc2_submit_int_msg(struct udevice *dev, struct usb_device *udev,
unsigned long pipe, void *buffer, int length,
int interval, bool nonblock)
{
struct dwc2_priv *priv = dev_get_priv(dev);
debug("%s: dev='%s', udev=%p\n", __func__, dev->name, udev);
return _submit_int_msg(priv, udev, pipe, buffer, length, interval,
nonblock);
}
static int dwc2_usb_of_to_plat(struct udevice *dev)
{
struct dwc2_priv *priv = dev_get_priv(dev);
priv->regs = dev_read_addr_ptr(dev);
if (!priv->regs)
return -EINVAL;
priv->oc_disable = dev_read_bool(dev, "disable-over-current");
priv->hnp_srp_disable = dev_read_bool(dev, "hnp-srp-disable");
return 0;
}
static int dwc2_setup_phy(struct udevice *dev)
{
struct dwc2_priv *priv = dev_get_priv(dev);
int ret;
ret = generic_phy_get_by_index(dev, 0, &priv->phy);
if (ret) {
if (ret == -ENOENT)
return 0; /* no PHY, nothing to do */
dev_err(dev, "Failed to get USB PHY: %d.\n", ret);
return ret;
}
ret = generic_phy_init(&priv->phy);
if (ret) {
dev_dbg(dev, "Failed to init USB PHY: %d.\n", ret);
return ret;
}
ret = generic_phy_power_on(&priv->phy);
if (ret) {
dev_dbg(dev, "Failed to power on USB PHY: %d.\n", ret);
generic_phy_exit(&priv->phy);
return ret;
}
return 0;
}
static int dwc2_shutdown_phy(struct udevice *dev)
{
struct dwc2_priv *priv = dev_get_priv(dev);
int ret;
/* PHY is not valid when generic_phy_get_by_index() = -ENOENT */
if (!generic_phy_valid(&priv->phy))
return 0; /* no PHY, nothing to do */
ret = generic_phy_power_off(&priv->phy);
if (ret) {
dev_dbg(dev, "Failed to power off USB PHY: %d.\n", ret);
return ret;
}
ret = generic_phy_exit(&priv->phy);
if (ret) {
dev_dbg(dev, "Failed to power off USB PHY: %d.\n", ret);
return ret;
}
return 0;
}
static int dwc2_clk_init(struct udevice *dev)
{
struct dwc2_priv *priv = dev_get_priv(dev);
int ret;
ret = clk_get_bulk(dev, &priv->clks);
if (ret == -ENOSYS || ret == -ENOENT)
return 0;
if (ret)
return ret;
ret = clk_enable_bulk(&priv->clks);
if (ret) {
clk_release_bulk(&priv->clks);
return ret;
}
return 0;
}
static int dwc2_usb_probe(struct udevice *dev)
{
struct dwc2_priv *priv = dev_get_priv(dev);
struct usb_bus_priv *bus_priv = dev_get_uclass_priv(dev);
int ret;
bus_priv->desc_before_addr = true;
ret = dwc2_clk_init(dev);
if (ret)
return ret;
ret = dwc2_setup_phy(dev);
if (ret)
return ret;
return dwc2_init_common(dev, priv);
}
static int dwc2_usb_remove(struct udevice *dev)
{
struct dwc2_priv *priv = dev_get_priv(dev);
int ret;
ret = dwc_vbus_supply_exit(dev);
if (ret)
return ret;
ret = dwc2_shutdown_phy(dev);
if (ret) {
dev_dbg(dev, "Failed to shutdown USB PHY: %d.\n", ret);
return ret;
}
dwc2_uninit_common(priv->regs);
reset_release_bulk(&priv->resets);
clk_disable_bulk(&priv->clks);
clk_release_bulk(&priv->clks);
return 0;
}
struct dm_usb_ops dwc2_usb_ops = {
.control = dwc2_submit_control_msg,
.bulk = dwc2_submit_bulk_msg,
.interrupt = dwc2_submit_int_msg,
};
static const struct udevice_id dwc2_usb_ids[] = {
{ .compatible = "brcm,bcm2835-usb" },
{ .compatible = "brcm,bcm2708-usb" },
{ .compatible = "snps,dwc2" },
{ }
};
U_BOOT_DRIVER(usb_dwc2) = {
.name = "dwc2_usb",
.id = UCLASS_USB,
.of_match = dwc2_usb_ids,
.of_to_plat = dwc2_usb_of_to_plat,
.probe = dwc2_usb_probe,
.remove = dwc2_usb_remove,
.ops = &dwc2_usb_ops,
.priv_auto = sizeof(struct dwc2_priv),
.flags = DM_FLAG_ALLOC_PRIV_DMA,
};
#endif
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