mirror of https://gitee.com/openkylin/linux.git
1505 lines
35 KiB
C
1505 lines
35 KiB
C
/**
|
|
* core.c - DesignWare USB3 DRD Controller Core file
|
|
*
|
|
* Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com
|
|
*
|
|
* Authors: Felipe Balbi <balbi@ti.com>,
|
|
* Sebastian Andrzej Siewior <bigeasy@linutronix.de>
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 of
|
|
* the License as published by the Free Software Foundation.
|
|
*
|
|
* 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, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <linux/version.h>
|
|
#include <linux/module.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/spinlock.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/pm_runtime.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/ioport.h>
|
|
#include <linux/io.h>
|
|
#include <linux/list.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/dma-mapping.h>
|
|
#include <linux/of.h>
|
|
#include <linux/acpi.h>
|
|
#include <linux/pinctrl/consumer.h>
|
|
|
|
#include <linux/usb/ch9.h>
|
|
#include <linux/usb/gadget.h>
|
|
#include <linux/usb/of.h>
|
|
#include <linux/usb/otg.h>
|
|
|
|
#include "core.h"
|
|
#include "gadget.h"
|
|
#include "io.h"
|
|
|
|
#include "debug.h"
|
|
|
|
#define DWC3_DEFAULT_AUTOSUSPEND_DELAY 5000 /* ms */
|
|
|
|
/**
|
|
* dwc3_get_dr_mode - Validates and sets dr_mode
|
|
* @dwc: pointer to our context structure
|
|
*/
|
|
static int dwc3_get_dr_mode(struct dwc3 *dwc)
|
|
{
|
|
enum usb_dr_mode mode;
|
|
struct device *dev = dwc->dev;
|
|
unsigned int hw_mode;
|
|
|
|
if (dwc->dr_mode == USB_DR_MODE_UNKNOWN)
|
|
dwc->dr_mode = USB_DR_MODE_OTG;
|
|
|
|
mode = dwc->dr_mode;
|
|
hw_mode = DWC3_GHWPARAMS0_MODE(dwc->hwparams.hwparams0);
|
|
|
|
switch (hw_mode) {
|
|
case DWC3_GHWPARAMS0_MODE_GADGET:
|
|
if (IS_ENABLED(CONFIG_USB_DWC3_HOST)) {
|
|
dev_err(dev,
|
|
"Controller does not support host mode.\n");
|
|
return -EINVAL;
|
|
}
|
|
mode = USB_DR_MODE_PERIPHERAL;
|
|
break;
|
|
case DWC3_GHWPARAMS0_MODE_HOST:
|
|
if (IS_ENABLED(CONFIG_USB_DWC3_GADGET)) {
|
|
dev_err(dev,
|
|
"Controller does not support device mode.\n");
|
|
return -EINVAL;
|
|
}
|
|
mode = USB_DR_MODE_HOST;
|
|
break;
|
|
default:
|
|
if (IS_ENABLED(CONFIG_USB_DWC3_HOST))
|
|
mode = USB_DR_MODE_HOST;
|
|
else if (IS_ENABLED(CONFIG_USB_DWC3_GADGET))
|
|
mode = USB_DR_MODE_PERIPHERAL;
|
|
}
|
|
|
|
if (mode != dwc->dr_mode) {
|
|
dev_warn(dev,
|
|
"Configuration mismatch. dr_mode forced to %s\n",
|
|
mode == USB_DR_MODE_HOST ? "host" : "gadget");
|
|
|
|
dwc->dr_mode = mode;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void dwc3_event_buffers_cleanup(struct dwc3 *dwc);
|
|
static int dwc3_event_buffers_setup(struct dwc3 *dwc);
|
|
|
|
static void dwc3_set_prtcap(struct dwc3 *dwc, u32 mode)
|
|
{
|
|
u32 reg;
|
|
|
|
reg = dwc3_readl(dwc->regs, DWC3_GCTL);
|
|
reg &= ~(DWC3_GCTL_PRTCAPDIR(DWC3_GCTL_PRTCAP_OTG));
|
|
reg |= DWC3_GCTL_PRTCAPDIR(mode);
|
|
dwc3_writel(dwc->regs, DWC3_GCTL, reg);
|
|
}
|
|
|
|
static void __dwc3_set_mode(struct work_struct *work)
|
|
{
|
|
struct dwc3 *dwc = work_to_dwc(work);
|
|
unsigned long flags;
|
|
int ret;
|
|
|
|
if (!dwc->desired_dr_role)
|
|
return;
|
|
|
|
if (dwc->desired_dr_role == dwc->current_dr_role)
|
|
return;
|
|
|
|
if (dwc->dr_mode != USB_DR_MODE_OTG)
|
|
return;
|
|
|
|
switch (dwc->current_dr_role) {
|
|
case DWC3_GCTL_PRTCAP_HOST:
|
|
dwc3_host_exit(dwc);
|
|
break;
|
|
case DWC3_GCTL_PRTCAP_DEVICE:
|
|
dwc3_gadget_exit(dwc);
|
|
dwc3_event_buffers_cleanup(dwc);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
spin_lock_irqsave(&dwc->lock, flags);
|
|
|
|
dwc3_set_prtcap(dwc, dwc->desired_dr_role);
|
|
|
|
dwc->current_dr_role = dwc->desired_dr_role;
|
|
|
|
spin_unlock_irqrestore(&dwc->lock, flags);
|
|
|
|
switch (dwc->desired_dr_role) {
|
|
case DWC3_GCTL_PRTCAP_HOST:
|
|
ret = dwc3_host_init(dwc);
|
|
if (ret) {
|
|
dev_err(dwc->dev, "failed to initialize host\n");
|
|
} else {
|
|
if (dwc->usb2_phy)
|
|
otg_set_vbus(dwc->usb2_phy->otg, true);
|
|
if (dwc->usb2_generic_phy)
|
|
phy_set_mode(dwc->usb2_generic_phy, PHY_MODE_USB_HOST);
|
|
|
|
}
|
|
break;
|
|
case DWC3_GCTL_PRTCAP_DEVICE:
|
|
dwc3_event_buffers_setup(dwc);
|
|
|
|
if (dwc->usb2_phy)
|
|
otg_set_vbus(dwc->usb2_phy->otg, false);
|
|
if (dwc->usb2_generic_phy)
|
|
phy_set_mode(dwc->usb2_generic_phy, PHY_MODE_USB_DEVICE);
|
|
|
|
ret = dwc3_gadget_init(dwc);
|
|
if (ret)
|
|
dev_err(dwc->dev, "failed to initialize peripheral\n");
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
void dwc3_set_mode(struct dwc3 *dwc, u32 mode)
|
|
{
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&dwc->lock, flags);
|
|
dwc->desired_dr_role = mode;
|
|
spin_unlock_irqrestore(&dwc->lock, flags);
|
|
|
|
queue_work(system_power_efficient_wq, &dwc->drd_work);
|
|
}
|
|
|
|
u32 dwc3_core_fifo_space(struct dwc3_ep *dep, u8 type)
|
|
{
|
|
struct dwc3 *dwc = dep->dwc;
|
|
u32 reg;
|
|
|
|
dwc3_writel(dwc->regs, DWC3_GDBGFIFOSPACE,
|
|
DWC3_GDBGFIFOSPACE_NUM(dep->number) |
|
|
DWC3_GDBGFIFOSPACE_TYPE(type));
|
|
|
|
reg = dwc3_readl(dwc->regs, DWC3_GDBGFIFOSPACE);
|
|
|
|
return DWC3_GDBGFIFOSPACE_SPACE_AVAILABLE(reg);
|
|
}
|
|
|
|
/**
|
|
* dwc3_core_soft_reset - Issues core soft reset and PHY reset
|
|
* @dwc: pointer to our context structure
|
|
*/
|
|
static int dwc3_core_soft_reset(struct dwc3 *dwc)
|
|
{
|
|
u32 reg;
|
|
int retries = 1000;
|
|
int ret;
|
|
|
|
usb_phy_init(dwc->usb2_phy);
|
|
usb_phy_init(dwc->usb3_phy);
|
|
ret = phy_init(dwc->usb2_generic_phy);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = phy_init(dwc->usb3_generic_phy);
|
|
if (ret < 0) {
|
|
phy_exit(dwc->usb2_generic_phy);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* We're resetting only the device side because, if we're in host mode,
|
|
* XHCI driver will reset the host block. If dwc3 was configured for
|
|
* host-only mode, then we can return early.
|
|
*/
|
|
if (dwc->dr_mode == USB_DR_MODE_HOST)
|
|
return 0;
|
|
|
|
reg = dwc3_readl(dwc->regs, DWC3_DCTL);
|
|
reg |= DWC3_DCTL_CSFTRST;
|
|
dwc3_writel(dwc->regs, DWC3_DCTL, reg);
|
|
|
|
do {
|
|
reg = dwc3_readl(dwc->regs, DWC3_DCTL);
|
|
if (!(reg & DWC3_DCTL_CSFTRST))
|
|
return 0;
|
|
|
|
udelay(1);
|
|
} while (--retries);
|
|
|
|
return -ETIMEDOUT;
|
|
}
|
|
|
|
/*
|
|
* dwc3_frame_length_adjustment - Adjusts frame length if required
|
|
* @dwc3: Pointer to our controller context structure
|
|
*/
|
|
static void dwc3_frame_length_adjustment(struct dwc3 *dwc)
|
|
{
|
|
u32 reg;
|
|
u32 dft;
|
|
|
|
if (dwc->revision < DWC3_REVISION_250A)
|
|
return;
|
|
|
|
if (dwc->fladj == 0)
|
|
return;
|
|
|
|
reg = dwc3_readl(dwc->regs, DWC3_GFLADJ);
|
|
dft = reg & DWC3_GFLADJ_30MHZ_MASK;
|
|
if (!dev_WARN_ONCE(dwc->dev, dft == dwc->fladj,
|
|
"request value same as default, ignoring\n")) {
|
|
reg &= ~DWC3_GFLADJ_30MHZ_MASK;
|
|
reg |= DWC3_GFLADJ_30MHZ_SDBND_SEL | dwc->fladj;
|
|
dwc3_writel(dwc->regs, DWC3_GFLADJ, reg);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* dwc3_free_one_event_buffer - Frees one event buffer
|
|
* @dwc: Pointer to our controller context structure
|
|
* @evt: Pointer to event buffer to be freed
|
|
*/
|
|
static void dwc3_free_one_event_buffer(struct dwc3 *dwc,
|
|
struct dwc3_event_buffer *evt)
|
|
{
|
|
dma_free_coherent(dwc->sysdev, evt->length, evt->buf, evt->dma);
|
|
}
|
|
|
|
/**
|
|
* dwc3_alloc_one_event_buffer - Allocates one event buffer structure
|
|
* @dwc: Pointer to our controller context structure
|
|
* @length: size of the event buffer
|
|
*
|
|
* Returns a pointer to the allocated event buffer structure on success
|
|
* otherwise ERR_PTR(errno).
|
|
*/
|
|
static struct dwc3_event_buffer *dwc3_alloc_one_event_buffer(struct dwc3 *dwc,
|
|
unsigned length)
|
|
{
|
|
struct dwc3_event_buffer *evt;
|
|
|
|
evt = devm_kzalloc(dwc->dev, sizeof(*evt), GFP_KERNEL);
|
|
if (!evt)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
evt->dwc = dwc;
|
|
evt->length = length;
|
|
evt->cache = devm_kzalloc(dwc->dev, length, GFP_KERNEL);
|
|
if (!evt->cache)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
evt->buf = dma_alloc_coherent(dwc->sysdev, length,
|
|
&evt->dma, GFP_KERNEL);
|
|
if (!evt->buf)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
return evt;
|
|
}
|
|
|
|
/**
|
|
* dwc3_free_event_buffers - frees all allocated event buffers
|
|
* @dwc: Pointer to our controller context structure
|
|
*/
|
|
static void dwc3_free_event_buffers(struct dwc3 *dwc)
|
|
{
|
|
struct dwc3_event_buffer *evt;
|
|
|
|
evt = dwc->ev_buf;
|
|
if (evt)
|
|
dwc3_free_one_event_buffer(dwc, evt);
|
|
}
|
|
|
|
/**
|
|
* dwc3_alloc_event_buffers - Allocates @num event buffers of size @length
|
|
* @dwc: pointer to our controller context structure
|
|
* @length: size of event buffer
|
|
*
|
|
* Returns 0 on success otherwise negative errno. In the error case, dwc
|
|
* may contain some buffers allocated but not all which were requested.
|
|
*/
|
|
static int dwc3_alloc_event_buffers(struct dwc3 *dwc, unsigned length)
|
|
{
|
|
struct dwc3_event_buffer *evt;
|
|
|
|
evt = dwc3_alloc_one_event_buffer(dwc, length);
|
|
if (IS_ERR(evt)) {
|
|
dev_err(dwc->dev, "can't allocate event buffer\n");
|
|
return PTR_ERR(evt);
|
|
}
|
|
dwc->ev_buf = evt;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* dwc3_event_buffers_setup - setup our allocated event buffers
|
|
* @dwc: pointer to our controller context structure
|
|
*
|
|
* Returns 0 on success otherwise negative errno.
|
|
*/
|
|
static int dwc3_event_buffers_setup(struct dwc3 *dwc)
|
|
{
|
|
struct dwc3_event_buffer *evt;
|
|
|
|
evt = dwc->ev_buf;
|
|
evt->lpos = 0;
|
|
dwc3_writel(dwc->regs, DWC3_GEVNTADRLO(0),
|
|
lower_32_bits(evt->dma));
|
|
dwc3_writel(dwc->regs, DWC3_GEVNTADRHI(0),
|
|
upper_32_bits(evt->dma));
|
|
dwc3_writel(dwc->regs, DWC3_GEVNTSIZ(0),
|
|
DWC3_GEVNTSIZ_SIZE(evt->length));
|
|
dwc3_writel(dwc->regs, DWC3_GEVNTCOUNT(0), 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void dwc3_event_buffers_cleanup(struct dwc3 *dwc)
|
|
{
|
|
struct dwc3_event_buffer *evt;
|
|
|
|
evt = dwc->ev_buf;
|
|
|
|
evt->lpos = 0;
|
|
|
|
dwc3_writel(dwc->regs, DWC3_GEVNTADRLO(0), 0);
|
|
dwc3_writel(dwc->regs, DWC3_GEVNTADRHI(0), 0);
|
|
dwc3_writel(dwc->regs, DWC3_GEVNTSIZ(0), DWC3_GEVNTSIZ_INTMASK
|
|
| DWC3_GEVNTSIZ_SIZE(0));
|
|
dwc3_writel(dwc->regs, DWC3_GEVNTCOUNT(0), 0);
|
|
}
|
|
|
|
static int dwc3_alloc_scratch_buffers(struct dwc3 *dwc)
|
|
{
|
|
if (!dwc->has_hibernation)
|
|
return 0;
|
|
|
|
if (!dwc->nr_scratch)
|
|
return 0;
|
|
|
|
dwc->scratchbuf = kmalloc_array(dwc->nr_scratch,
|
|
DWC3_SCRATCHBUF_SIZE, GFP_KERNEL);
|
|
if (!dwc->scratchbuf)
|
|
return -ENOMEM;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dwc3_setup_scratch_buffers(struct dwc3 *dwc)
|
|
{
|
|
dma_addr_t scratch_addr;
|
|
u32 param;
|
|
int ret;
|
|
|
|
if (!dwc->has_hibernation)
|
|
return 0;
|
|
|
|
if (!dwc->nr_scratch)
|
|
return 0;
|
|
|
|
/* should never fall here */
|
|
if (!WARN_ON(dwc->scratchbuf))
|
|
return 0;
|
|
|
|
scratch_addr = dma_map_single(dwc->sysdev, dwc->scratchbuf,
|
|
dwc->nr_scratch * DWC3_SCRATCHBUF_SIZE,
|
|
DMA_BIDIRECTIONAL);
|
|
if (dma_mapping_error(dwc->sysdev, scratch_addr)) {
|
|
dev_err(dwc->sysdev, "failed to map scratch buffer\n");
|
|
ret = -EFAULT;
|
|
goto err0;
|
|
}
|
|
|
|
dwc->scratch_addr = scratch_addr;
|
|
|
|
param = lower_32_bits(scratch_addr);
|
|
|
|
ret = dwc3_send_gadget_generic_command(dwc,
|
|
DWC3_DGCMD_SET_SCRATCHPAD_ADDR_LO, param);
|
|
if (ret < 0)
|
|
goto err1;
|
|
|
|
param = upper_32_bits(scratch_addr);
|
|
|
|
ret = dwc3_send_gadget_generic_command(dwc,
|
|
DWC3_DGCMD_SET_SCRATCHPAD_ADDR_HI, param);
|
|
if (ret < 0)
|
|
goto err1;
|
|
|
|
return 0;
|
|
|
|
err1:
|
|
dma_unmap_single(dwc->sysdev, dwc->scratch_addr, dwc->nr_scratch *
|
|
DWC3_SCRATCHBUF_SIZE, DMA_BIDIRECTIONAL);
|
|
|
|
err0:
|
|
return ret;
|
|
}
|
|
|
|
static void dwc3_free_scratch_buffers(struct dwc3 *dwc)
|
|
{
|
|
if (!dwc->has_hibernation)
|
|
return;
|
|
|
|
if (!dwc->nr_scratch)
|
|
return;
|
|
|
|
/* should never fall here */
|
|
if (!WARN_ON(dwc->scratchbuf))
|
|
return;
|
|
|
|
dma_unmap_single(dwc->sysdev, dwc->scratch_addr, dwc->nr_scratch *
|
|
DWC3_SCRATCHBUF_SIZE, DMA_BIDIRECTIONAL);
|
|
kfree(dwc->scratchbuf);
|
|
}
|
|
|
|
static void dwc3_core_num_eps(struct dwc3 *dwc)
|
|
{
|
|
struct dwc3_hwparams *parms = &dwc->hwparams;
|
|
|
|
dwc->num_eps = DWC3_NUM_EPS(parms);
|
|
}
|
|
|
|
static void dwc3_cache_hwparams(struct dwc3 *dwc)
|
|
{
|
|
struct dwc3_hwparams *parms = &dwc->hwparams;
|
|
|
|
parms->hwparams0 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS0);
|
|
parms->hwparams1 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS1);
|
|
parms->hwparams2 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS2);
|
|
parms->hwparams3 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS3);
|
|
parms->hwparams4 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS4);
|
|
parms->hwparams5 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS5);
|
|
parms->hwparams6 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS6);
|
|
parms->hwparams7 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS7);
|
|
parms->hwparams8 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS8);
|
|
}
|
|
|
|
/**
|
|
* dwc3_phy_setup - Configure USB PHY Interface of DWC3 Core
|
|
* @dwc: Pointer to our controller context structure
|
|
*
|
|
* Returns 0 on success. The USB PHY interfaces are configured but not
|
|
* initialized. The PHY interfaces and the PHYs get initialized together with
|
|
* the core in dwc3_core_init.
|
|
*/
|
|
static int dwc3_phy_setup(struct dwc3 *dwc)
|
|
{
|
|
u32 reg;
|
|
int ret;
|
|
|
|
reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0));
|
|
|
|
/*
|
|
* Make sure UX_EXIT_PX is cleared as that causes issues with some
|
|
* PHYs. Also, this bit is not supposed to be used in normal operation.
|
|
*/
|
|
reg &= ~DWC3_GUSB3PIPECTL_UX_EXIT_PX;
|
|
|
|
/*
|
|
* Above 1.94a, it is recommended to set DWC3_GUSB3PIPECTL_SUSPHY
|
|
* to '0' during coreConsultant configuration. So default value
|
|
* will be '0' when the core is reset. Application needs to set it
|
|
* to '1' after the core initialization is completed.
|
|
*/
|
|
if (dwc->revision > DWC3_REVISION_194A)
|
|
reg |= DWC3_GUSB3PIPECTL_SUSPHY;
|
|
|
|
if (dwc->u2ss_inp3_quirk)
|
|
reg |= DWC3_GUSB3PIPECTL_U2SSINP3OK;
|
|
|
|
if (dwc->dis_rxdet_inp3_quirk)
|
|
reg |= DWC3_GUSB3PIPECTL_DISRXDETINP3;
|
|
|
|
if (dwc->req_p1p2p3_quirk)
|
|
reg |= DWC3_GUSB3PIPECTL_REQP1P2P3;
|
|
|
|
if (dwc->del_p1p2p3_quirk)
|
|
reg |= DWC3_GUSB3PIPECTL_DEP1P2P3_EN;
|
|
|
|
if (dwc->del_phy_power_chg_quirk)
|
|
reg |= DWC3_GUSB3PIPECTL_DEPOCHANGE;
|
|
|
|
if (dwc->lfps_filter_quirk)
|
|
reg |= DWC3_GUSB3PIPECTL_LFPSFILT;
|
|
|
|
if (dwc->rx_detect_poll_quirk)
|
|
reg |= DWC3_GUSB3PIPECTL_RX_DETOPOLL;
|
|
|
|
if (dwc->tx_de_emphasis_quirk)
|
|
reg |= DWC3_GUSB3PIPECTL_TX_DEEPH(dwc->tx_de_emphasis);
|
|
|
|
if (dwc->dis_u3_susphy_quirk)
|
|
reg &= ~DWC3_GUSB3PIPECTL_SUSPHY;
|
|
|
|
if (dwc->dis_del_phy_power_chg_quirk)
|
|
reg &= ~DWC3_GUSB3PIPECTL_DEPOCHANGE;
|
|
|
|
dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg);
|
|
|
|
reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0));
|
|
|
|
/* Select the HS PHY interface */
|
|
switch (DWC3_GHWPARAMS3_HSPHY_IFC(dwc->hwparams.hwparams3)) {
|
|
case DWC3_GHWPARAMS3_HSPHY_IFC_UTMI_ULPI:
|
|
if (dwc->hsphy_interface &&
|
|
!strncmp(dwc->hsphy_interface, "utmi", 4)) {
|
|
reg &= ~DWC3_GUSB2PHYCFG_ULPI_UTMI;
|
|
break;
|
|
} else if (dwc->hsphy_interface &&
|
|
!strncmp(dwc->hsphy_interface, "ulpi", 4)) {
|
|
reg |= DWC3_GUSB2PHYCFG_ULPI_UTMI;
|
|
dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
|
|
} else {
|
|
/* Relying on default value. */
|
|
if (!(reg & DWC3_GUSB2PHYCFG_ULPI_UTMI))
|
|
break;
|
|
}
|
|
/* FALLTHROUGH */
|
|
case DWC3_GHWPARAMS3_HSPHY_IFC_ULPI:
|
|
ret = dwc3_ulpi_init(dwc);
|
|
if (ret)
|
|
return ret;
|
|
/* FALLTHROUGH */
|
|
default:
|
|
break;
|
|
}
|
|
|
|
switch (dwc->hsphy_mode) {
|
|
case USBPHY_INTERFACE_MODE_UTMI:
|
|
reg &= ~(DWC3_GUSB2PHYCFG_PHYIF_MASK |
|
|
DWC3_GUSB2PHYCFG_USBTRDTIM_MASK);
|
|
reg |= DWC3_GUSB2PHYCFG_PHYIF(UTMI_PHYIF_8_BIT) |
|
|
DWC3_GUSB2PHYCFG_USBTRDTIM(USBTRDTIM_UTMI_8_BIT);
|
|
break;
|
|
case USBPHY_INTERFACE_MODE_UTMIW:
|
|
reg &= ~(DWC3_GUSB2PHYCFG_PHYIF_MASK |
|
|
DWC3_GUSB2PHYCFG_USBTRDTIM_MASK);
|
|
reg |= DWC3_GUSB2PHYCFG_PHYIF(UTMI_PHYIF_16_BIT) |
|
|
DWC3_GUSB2PHYCFG_USBTRDTIM(USBTRDTIM_UTMI_16_BIT);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Above 1.94a, it is recommended to set DWC3_GUSB2PHYCFG_SUSPHY to
|
|
* '0' during coreConsultant configuration. So default value will
|
|
* be '0' when the core is reset. Application needs to set it to
|
|
* '1' after the core initialization is completed.
|
|
*/
|
|
if (dwc->revision > DWC3_REVISION_194A)
|
|
reg |= DWC3_GUSB2PHYCFG_SUSPHY;
|
|
|
|
if (dwc->dis_u2_susphy_quirk)
|
|
reg &= ~DWC3_GUSB2PHYCFG_SUSPHY;
|
|
|
|
if (dwc->dis_enblslpm_quirk)
|
|
reg &= ~DWC3_GUSB2PHYCFG_ENBLSLPM;
|
|
|
|
if (dwc->dis_u2_freeclk_exists_quirk)
|
|
reg &= ~DWC3_GUSB2PHYCFG_U2_FREECLK_EXISTS;
|
|
|
|
dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void dwc3_core_exit(struct dwc3 *dwc)
|
|
{
|
|
dwc3_event_buffers_cleanup(dwc);
|
|
|
|
usb_phy_shutdown(dwc->usb2_phy);
|
|
usb_phy_shutdown(dwc->usb3_phy);
|
|
phy_exit(dwc->usb2_generic_phy);
|
|
phy_exit(dwc->usb3_generic_phy);
|
|
|
|
usb_phy_set_suspend(dwc->usb2_phy, 1);
|
|
usb_phy_set_suspend(dwc->usb3_phy, 1);
|
|
phy_power_off(dwc->usb2_generic_phy);
|
|
phy_power_off(dwc->usb3_generic_phy);
|
|
}
|
|
|
|
static bool dwc3_core_is_valid(struct dwc3 *dwc)
|
|
{
|
|
u32 reg;
|
|
|
|
reg = dwc3_readl(dwc->regs, DWC3_GSNPSID);
|
|
|
|
/* This should read as U3 followed by revision number */
|
|
if ((reg & DWC3_GSNPSID_MASK) == 0x55330000) {
|
|
/* Detected DWC_usb3 IP */
|
|
dwc->revision = reg;
|
|
} else if ((reg & DWC3_GSNPSID_MASK) == 0x33310000) {
|
|
/* Detected DWC_usb31 IP */
|
|
dwc->revision = dwc3_readl(dwc->regs, DWC3_VER_NUMBER);
|
|
dwc->revision |= DWC3_REVISION_IS_DWC31;
|
|
} else {
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
static void dwc3_core_setup_global_control(struct dwc3 *dwc)
|
|
{
|
|
u32 hwparams4 = dwc->hwparams.hwparams4;
|
|
u32 reg;
|
|
|
|
reg = dwc3_readl(dwc->regs, DWC3_GCTL);
|
|
reg &= ~DWC3_GCTL_SCALEDOWN_MASK;
|
|
|
|
switch (DWC3_GHWPARAMS1_EN_PWROPT(dwc->hwparams.hwparams1)) {
|
|
case DWC3_GHWPARAMS1_EN_PWROPT_CLK:
|
|
/**
|
|
* WORKAROUND: DWC3 revisions between 2.10a and 2.50a have an
|
|
* issue which would cause xHCI compliance tests to fail.
|
|
*
|
|
* Because of that we cannot enable clock gating on such
|
|
* configurations.
|
|
*
|
|
* Refers to:
|
|
*
|
|
* STAR#9000588375: Clock Gating, SOF Issues when ref_clk-Based
|
|
* SOF/ITP Mode Used
|
|
*/
|
|
if ((dwc->dr_mode == USB_DR_MODE_HOST ||
|
|
dwc->dr_mode == USB_DR_MODE_OTG) &&
|
|
(dwc->revision >= DWC3_REVISION_210A &&
|
|
dwc->revision <= DWC3_REVISION_250A))
|
|
reg |= DWC3_GCTL_DSBLCLKGTNG | DWC3_GCTL_SOFITPSYNC;
|
|
else
|
|
reg &= ~DWC3_GCTL_DSBLCLKGTNG;
|
|
break;
|
|
case DWC3_GHWPARAMS1_EN_PWROPT_HIB:
|
|
/* enable hibernation here */
|
|
dwc->nr_scratch = DWC3_GHWPARAMS4_HIBER_SCRATCHBUFS(hwparams4);
|
|
|
|
/*
|
|
* REVISIT Enabling this bit so that host-mode hibernation
|
|
* will work. Device-mode hibernation is not yet implemented.
|
|
*/
|
|
reg |= DWC3_GCTL_GBLHIBERNATIONEN;
|
|
break;
|
|
default:
|
|
/* nothing */
|
|
break;
|
|
}
|
|
|
|
/* check if current dwc3 is on simulation board */
|
|
if (dwc->hwparams.hwparams6 & DWC3_GHWPARAMS6_EN_FPGA) {
|
|
dev_info(dwc->dev, "Running with FPGA optmizations\n");
|
|
dwc->is_fpga = true;
|
|
}
|
|
|
|
WARN_ONCE(dwc->disable_scramble_quirk && !dwc->is_fpga,
|
|
"disable_scramble cannot be used on non-FPGA builds\n");
|
|
|
|
if (dwc->disable_scramble_quirk && dwc->is_fpga)
|
|
reg |= DWC3_GCTL_DISSCRAMBLE;
|
|
else
|
|
reg &= ~DWC3_GCTL_DISSCRAMBLE;
|
|
|
|
if (dwc->u2exit_lfps_quirk)
|
|
reg |= DWC3_GCTL_U2EXIT_LFPS;
|
|
|
|
/*
|
|
* WORKAROUND: DWC3 revisions <1.90a have a bug
|
|
* where the device can fail to connect at SuperSpeed
|
|
* and falls back to high-speed mode which causes
|
|
* the device to enter a Connect/Disconnect loop
|
|
*/
|
|
if (dwc->revision < DWC3_REVISION_190A)
|
|
reg |= DWC3_GCTL_U2RSTECN;
|
|
|
|
dwc3_writel(dwc->regs, DWC3_GCTL, reg);
|
|
}
|
|
|
|
static int dwc3_core_get_phy(struct dwc3 *dwc);
|
|
|
|
/**
|
|
* dwc3_core_init - Low-level initialization of DWC3 Core
|
|
* @dwc: Pointer to our controller context structure
|
|
*
|
|
* Returns 0 on success otherwise negative errno.
|
|
*/
|
|
static int dwc3_core_init(struct dwc3 *dwc)
|
|
{
|
|
u32 reg;
|
|
int ret;
|
|
|
|
if (!dwc3_core_is_valid(dwc)) {
|
|
dev_err(dwc->dev, "this is not a DesignWare USB3 DRD Core\n");
|
|
ret = -ENODEV;
|
|
goto err0;
|
|
}
|
|
|
|
/*
|
|
* Write Linux Version Code to our GUID register so it's easy to figure
|
|
* out which kernel version a bug was found.
|
|
*/
|
|
dwc3_writel(dwc->regs, DWC3_GUID, LINUX_VERSION_CODE);
|
|
|
|
/* Handle USB2.0-only core configuration */
|
|
if (DWC3_GHWPARAMS3_SSPHY_IFC(dwc->hwparams.hwparams3) ==
|
|
DWC3_GHWPARAMS3_SSPHY_IFC_DIS) {
|
|
if (dwc->maximum_speed == USB_SPEED_SUPER)
|
|
dwc->maximum_speed = USB_SPEED_HIGH;
|
|
}
|
|
|
|
ret = dwc3_core_get_phy(dwc);
|
|
if (ret)
|
|
goto err0;
|
|
|
|
ret = dwc3_core_soft_reset(dwc);
|
|
if (ret)
|
|
goto err0;
|
|
|
|
ret = dwc3_phy_setup(dwc);
|
|
if (ret)
|
|
goto err0;
|
|
|
|
dwc3_core_setup_global_control(dwc);
|
|
dwc3_core_num_eps(dwc);
|
|
|
|
ret = dwc3_setup_scratch_buffers(dwc);
|
|
if (ret)
|
|
goto err1;
|
|
|
|
/* Adjust Frame Length */
|
|
dwc3_frame_length_adjustment(dwc);
|
|
|
|
usb_phy_set_suspend(dwc->usb2_phy, 0);
|
|
usb_phy_set_suspend(dwc->usb3_phy, 0);
|
|
ret = phy_power_on(dwc->usb2_generic_phy);
|
|
if (ret < 0)
|
|
goto err2;
|
|
|
|
ret = phy_power_on(dwc->usb3_generic_phy);
|
|
if (ret < 0)
|
|
goto err3;
|
|
|
|
ret = dwc3_event_buffers_setup(dwc);
|
|
if (ret) {
|
|
dev_err(dwc->dev, "failed to setup event buffers\n");
|
|
goto err4;
|
|
}
|
|
|
|
/*
|
|
* ENDXFER polling is available on version 3.10a and later of
|
|
* the DWC_usb3 controller. It is NOT available in the
|
|
* DWC_usb31 controller.
|
|
*/
|
|
if (!dwc3_is_usb31(dwc) && dwc->revision >= DWC3_REVISION_310A) {
|
|
reg = dwc3_readl(dwc->regs, DWC3_GUCTL2);
|
|
reg |= DWC3_GUCTL2_RST_ACTBITLATER;
|
|
dwc3_writel(dwc->regs, DWC3_GUCTL2, reg);
|
|
}
|
|
|
|
if (dwc->revision >= DWC3_REVISION_250A) {
|
|
reg = dwc3_readl(dwc->regs, DWC3_GUCTL1);
|
|
|
|
/*
|
|
* Enable hardware control of sending remote wakeup
|
|
* in HS when the device is in the L1 state.
|
|
*/
|
|
if (dwc->revision >= DWC3_REVISION_290A)
|
|
reg |= DWC3_GUCTL1_DEV_L1_EXIT_BY_HW;
|
|
|
|
if (dwc->dis_tx_ipgap_linecheck_quirk)
|
|
reg |= DWC3_GUCTL1_TX_IPGAP_LINECHECK_DIS;
|
|
|
|
dwc3_writel(dwc->regs, DWC3_GUCTL1, reg);
|
|
}
|
|
|
|
return 0;
|
|
|
|
err4:
|
|
phy_power_off(dwc->usb3_generic_phy);
|
|
|
|
err3:
|
|
phy_power_off(dwc->usb2_generic_phy);
|
|
|
|
err2:
|
|
usb_phy_set_suspend(dwc->usb2_phy, 1);
|
|
usb_phy_set_suspend(dwc->usb3_phy, 1);
|
|
|
|
err1:
|
|
usb_phy_shutdown(dwc->usb2_phy);
|
|
usb_phy_shutdown(dwc->usb3_phy);
|
|
phy_exit(dwc->usb2_generic_phy);
|
|
phy_exit(dwc->usb3_generic_phy);
|
|
|
|
err0:
|
|
return ret;
|
|
}
|
|
|
|
static int dwc3_core_get_phy(struct dwc3 *dwc)
|
|
{
|
|
struct device *dev = dwc->dev;
|
|
struct device_node *node = dev->of_node;
|
|
int ret;
|
|
|
|
if (node) {
|
|
dwc->usb2_phy = devm_usb_get_phy_by_phandle(dev, "usb-phy", 0);
|
|
dwc->usb3_phy = devm_usb_get_phy_by_phandle(dev, "usb-phy", 1);
|
|
} else {
|
|
dwc->usb2_phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2);
|
|
dwc->usb3_phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB3);
|
|
}
|
|
|
|
if (IS_ERR(dwc->usb2_phy)) {
|
|
ret = PTR_ERR(dwc->usb2_phy);
|
|
if (ret == -ENXIO || ret == -ENODEV) {
|
|
dwc->usb2_phy = NULL;
|
|
} else if (ret == -EPROBE_DEFER) {
|
|
return ret;
|
|
} else {
|
|
dev_err(dev, "no usb2 phy configured\n");
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
if (IS_ERR(dwc->usb3_phy)) {
|
|
ret = PTR_ERR(dwc->usb3_phy);
|
|
if (ret == -ENXIO || ret == -ENODEV) {
|
|
dwc->usb3_phy = NULL;
|
|
} else if (ret == -EPROBE_DEFER) {
|
|
return ret;
|
|
} else {
|
|
dev_err(dev, "no usb3 phy configured\n");
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
dwc->usb2_generic_phy = devm_phy_get(dev, "usb2-phy");
|
|
if (IS_ERR(dwc->usb2_generic_phy)) {
|
|
ret = PTR_ERR(dwc->usb2_generic_phy);
|
|
if (ret == -ENOSYS || ret == -ENODEV) {
|
|
dwc->usb2_generic_phy = NULL;
|
|
} else if (ret == -EPROBE_DEFER) {
|
|
return ret;
|
|
} else {
|
|
dev_err(dev, "no usb2 phy configured\n");
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
dwc->usb3_generic_phy = devm_phy_get(dev, "usb3-phy");
|
|
if (IS_ERR(dwc->usb3_generic_phy)) {
|
|
ret = PTR_ERR(dwc->usb3_generic_phy);
|
|
if (ret == -ENOSYS || ret == -ENODEV) {
|
|
dwc->usb3_generic_phy = NULL;
|
|
} else if (ret == -EPROBE_DEFER) {
|
|
return ret;
|
|
} else {
|
|
dev_err(dev, "no usb3 phy configured\n");
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dwc3_core_init_mode(struct dwc3 *dwc)
|
|
{
|
|
struct device *dev = dwc->dev;
|
|
int ret;
|
|
|
|
switch (dwc->dr_mode) {
|
|
case USB_DR_MODE_PERIPHERAL:
|
|
dwc3_set_prtcap(dwc, DWC3_GCTL_PRTCAP_DEVICE);
|
|
|
|
if (dwc->usb2_phy)
|
|
otg_set_vbus(dwc->usb2_phy->otg, false);
|
|
if (dwc->usb2_generic_phy)
|
|
phy_set_mode(dwc->usb2_generic_phy, PHY_MODE_USB_DEVICE);
|
|
|
|
ret = dwc3_gadget_init(dwc);
|
|
if (ret) {
|
|
if (ret != -EPROBE_DEFER)
|
|
dev_err(dev, "failed to initialize gadget\n");
|
|
return ret;
|
|
}
|
|
break;
|
|
case USB_DR_MODE_HOST:
|
|
dwc3_set_prtcap(dwc, DWC3_GCTL_PRTCAP_HOST);
|
|
|
|
if (dwc->usb2_phy)
|
|
otg_set_vbus(dwc->usb2_phy->otg, true);
|
|
if (dwc->usb2_generic_phy)
|
|
phy_set_mode(dwc->usb2_generic_phy, PHY_MODE_USB_HOST);
|
|
|
|
ret = dwc3_host_init(dwc);
|
|
if (ret) {
|
|
if (ret != -EPROBE_DEFER)
|
|
dev_err(dev, "failed to initialize host\n");
|
|
return ret;
|
|
}
|
|
break;
|
|
case USB_DR_MODE_OTG:
|
|
INIT_WORK(&dwc->drd_work, __dwc3_set_mode);
|
|
ret = dwc3_drd_init(dwc);
|
|
if (ret) {
|
|
if (ret != -EPROBE_DEFER)
|
|
dev_err(dev, "failed to initialize dual-role\n");
|
|
return ret;
|
|
}
|
|
break;
|
|
default:
|
|
dev_err(dev, "Unsupported mode of operation %d\n", dwc->dr_mode);
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void dwc3_core_exit_mode(struct dwc3 *dwc)
|
|
{
|
|
switch (dwc->dr_mode) {
|
|
case USB_DR_MODE_PERIPHERAL:
|
|
dwc3_gadget_exit(dwc);
|
|
break;
|
|
case USB_DR_MODE_HOST:
|
|
dwc3_host_exit(dwc);
|
|
break;
|
|
case USB_DR_MODE_OTG:
|
|
dwc3_drd_exit(dwc);
|
|
break;
|
|
default:
|
|
/* do nothing */
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void dwc3_get_properties(struct dwc3 *dwc)
|
|
{
|
|
struct device *dev = dwc->dev;
|
|
u8 lpm_nyet_threshold;
|
|
u8 tx_de_emphasis;
|
|
u8 hird_threshold;
|
|
|
|
/* default to highest possible threshold */
|
|
lpm_nyet_threshold = 0xff;
|
|
|
|
/* default to -3.5dB de-emphasis */
|
|
tx_de_emphasis = 1;
|
|
|
|
/*
|
|
* default to assert utmi_sleep_n and use maximum allowed HIRD
|
|
* threshold value of 0b1100
|
|
*/
|
|
hird_threshold = 12;
|
|
|
|
dwc->maximum_speed = usb_get_maximum_speed(dev);
|
|
dwc->dr_mode = usb_get_dr_mode(dev);
|
|
dwc->hsphy_mode = of_usb_get_phy_mode(dev->of_node);
|
|
|
|
dwc->sysdev_is_parent = device_property_read_bool(dev,
|
|
"linux,sysdev_is_parent");
|
|
if (dwc->sysdev_is_parent)
|
|
dwc->sysdev = dwc->dev->parent;
|
|
else
|
|
dwc->sysdev = dwc->dev;
|
|
|
|
dwc->has_lpm_erratum = device_property_read_bool(dev,
|
|
"snps,has-lpm-erratum");
|
|
device_property_read_u8(dev, "snps,lpm-nyet-threshold",
|
|
&lpm_nyet_threshold);
|
|
dwc->is_utmi_l1_suspend = device_property_read_bool(dev,
|
|
"snps,is-utmi-l1-suspend");
|
|
device_property_read_u8(dev, "snps,hird-threshold",
|
|
&hird_threshold);
|
|
dwc->usb3_lpm_capable = device_property_read_bool(dev,
|
|
"snps,usb3_lpm_capable");
|
|
|
|
dwc->disable_scramble_quirk = device_property_read_bool(dev,
|
|
"snps,disable_scramble_quirk");
|
|
dwc->u2exit_lfps_quirk = device_property_read_bool(dev,
|
|
"snps,u2exit_lfps_quirk");
|
|
dwc->u2ss_inp3_quirk = device_property_read_bool(dev,
|
|
"snps,u2ss_inp3_quirk");
|
|
dwc->req_p1p2p3_quirk = device_property_read_bool(dev,
|
|
"snps,req_p1p2p3_quirk");
|
|
dwc->del_p1p2p3_quirk = device_property_read_bool(dev,
|
|
"snps,del_p1p2p3_quirk");
|
|
dwc->del_phy_power_chg_quirk = device_property_read_bool(dev,
|
|
"snps,del_phy_power_chg_quirk");
|
|
dwc->lfps_filter_quirk = device_property_read_bool(dev,
|
|
"snps,lfps_filter_quirk");
|
|
dwc->rx_detect_poll_quirk = device_property_read_bool(dev,
|
|
"snps,rx_detect_poll_quirk");
|
|
dwc->dis_u3_susphy_quirk = device_property_read_bool(dev,
|
|
"snps,dis_u3_susphy_quirk");
|
|
dwc->dis_u2_susphy_quirk = device_property_read_bool(dev,
|
|
"snps,dis_u2_susphy_quirk");
|
|
dwc->dis_enblslpm_quirk = device_property_read_bool(dev,
|
|
"snps,dis_enblslpm_quirk");
|
|
dwc->dis_rxdet_inp3_quirk = device_property_read_bool(dev,
|
|
"snps,dis_rxdet_inp3_quirk");
|
|
dwc->dis_u2_freeclk_exists_quirk = device_property_read_bool(dev,
|
|
"snps,dis-u2-freeclk-exists-quirk");
|
|
dwc->dis_del_phy_power_chg_quirk = device_property_read_bool(dev,
|
|
"snps,dis-del-phy-power-chg-quirk");
|
|
dwc->dis_tx_ipgap_linecheck_quirk = device_property_read_bool(dev,
|
|
"snps,dis-tx-ipgap-linecheck-quirk");
|
|
|
|
dwc->tx_de_emphasis_quirk = device_property_read_bool(dev,
|
|
"snps,tx_de_emphasis_quirk");
|
|
device_property_read_u8(dev, "snps,tx_de_emphasis",
|
|
&tx_de_emphasis);
|
|
device_property_read_string(dev, "snps,hsphy_interface",
|
|
&dwc->hsphy_interface);
|
|
device_property_read_u32(dev, "snps,quirk-frame-length-adjustment",
|
|
&dwc->fladj);
|
|
|
|
dwc->lpm_nyet_threshold = lpm_nyet_threshold;
|
|
dwc->tx_de_emphasis = tx_de_emphasis;
|
|
|
|
dwc->hird_threshold = hird_threshold
|
|
| (dwc->is_utmi_l1_suspend << 4);
|
|
|
|
dwc->imod_interval = 0;
|
|
}
|
|
|
|
/* check whether the core supports IMOD */
|
|
bool dwc3_has_imod(struct dwc3 *dwc)
|
|
{
|
|
return ((dwc3_is_usb3(dwc) &&
|
|
dwc->revision >= DWC3_REVISION_300A) ||
|
|
(dwc3_is_usb31(dwc) &&
|
|
dwc->revision >= DWC3_USB31_REVISION_120A));
|
|
}
|
|
|
|
static void dwc3_check_params(struct dwc3 *dwc)
|
|
{
|
|
struct device *dev = dwc->dev;
|
|
|
|
/* Check for proper value of imod_interval */
|
|
if (dwc->imod_interval && !dwc3_has_imod(dwc)) {
|
|
dev_warn(dwc->dev, "Interrupt moderation not supported\n");
|
|
dwc->imod_interval = 0;
|
|
}
|
|
|
|
/*
|
|
* Workaround for STAR 9000961433 which affects only version
|
|
* 3.00a of the DWC_usb3 core. This prevents the controller
|
|
* interrupt from being masked while handling events. IMOD
|
|
* allows us to work around this issue. Enable it for the
|
|
* affected version.
|
|
*/
|
|
if (!dwc->imod_interval &&
|
|
(dwc->revision == DWC3_REVISION_300A))
|
|
dwc->imod_interval = 1;
|
|
|
|
/* Check the maximum_speed parameter */
|
|
switch (dwc->maximum_speed) {
|
|
case USB_SPEED_LOW:
|
|
case USB_SPEED_FULL:
|
|
case USB_SPEED_HIGH:
|
|
case USB_SPEED_SUPER:
|
|
case USB_SPEED_SUPER_PLUS:
|
|
break;
|
|
default:
|
|
dev_err(dev, "invalid maximum_speed parameter %d\n",
|
|
dwc->maximum_speed);
|
|
/* fall through */
|
|
case USB_SPEED_UNKNOWN:
|
|
/* default to superspeed */
|
|
dwc->maximum_speed = USB_SPEED_SUPER;
|
|
|
|
/*
|
|
* default to superspeed plus if we are capable.
|
|
*/
|
|
if (dwc3_is_usb31(dwc) &&
|
|
(DWC3_GHWPARAMS3_SSPHY_IFC(dwc->hwparams.hwparams3) ==
|
|
DWC3_GHWPARAMS3_SSPHY_IFC_GEN2))
|
|
dwc->maximum_speed = USB_SPEED_SUPER_PLUS;
|
|
|
|
break;
|
|
}
|
|
}
|
|
|
|
static int dwc3_probe(struct platform_device *pdev)
|
|
{
|
|
struct device *dev = &pdev->dev;
|
|
struct resource *res;
|
|
struct dwc3 *dwc;
|
|
|
|
int ret;
|
|
|
|
void __iomem *regs;
|
|
|
|
dwc = devm_kzalloc(dev, sizeof(*dwc), GFP_KERNEL);
|
|
if (!dwc)
|
|
return -ENOMEM;
|
|
|
|
dwc->dev = dev;
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
if (!res) {
|
|
dev_err(dev, "missing memory resource\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
dwc->xhci_resources[0].start = res->start;
|
|
dwc->xhci_resources[0].end = dwc->xhci_resources[0].start +
|
|
DWC3_XHCI_REGS_END;
|
|
dwc->xhci_resources[0].flags = res->flags;
|
|
dwc->xhci_resources[0].name = res->name;
|
|
|
|
res->start += DWC3_GLOBALS_REGS_START;
|
|
|
|
/*
|
|
* Request memory region but exclude xHCI regs,
|
|
* since it will be requested by the xhci-plat driver.
|
|
*/
|
|
regs = devm_ioremap_resource(dev, res);
|
|
if (IS_ERR(regs)) {
|
|
ret = PTR_ERR(regs);
|
|
goto err0;
|
|
}
|
|
|
|
dwc->regs = regs;
|
|
dwc->regs_size = resource_size(res);
|
|
|
|
dwc3_get_properties(dwc);
|
|
|
|
platform_set_drvdata(pdev, dwc);
|
|
dwc3_cache_hwparams(dwc);
|
|
|
|
spin_lock_init(&dwc->lock);
|
|
|
|
pm_runtime_set_active(dev);
|
|
pm_runtime_use_autosuspend(dev);
|
|
pm_runtime_set_autosuspend_delay(dev, DWC3_DEFAULT_AUTOSUSPEND_DELAY);
|
|
pm_runtime_enable(dev);
|
|
ret = pm_runtime_get_sync(dev);
|
|
if (ret < 0)
|
|
goto err1;
|
|
|
|
pm_runtime_forbid(dev);
|
|
|
|
ret = dwc3_alloc_event_buffers(dwc, DWC3_EVENT_BUFFERS_SIZE);
|
|
if (ret) {
|
|
dev_err(dwc->dev, "failed to allocate event buffers\n");
|
|
ret = -ENOMEM;
|
|
goto err2;
|
|
}
|
|
|
|
ret = dwc3_get_dr_mode(dwc);
|
|
if (ret)
|
|
goto err3;
|
|
|
|
ret = dwc3_alloc_scratch_buffers(dwc);
|
|
if (ret)
|
|
goto err3;
|
|
|
|
ret = dwc3_core_init(dwc);
|
|
if (ret) {
|
|
dev_err(dev, "failed to initialize core\n");
|
|
goto err4;
|
|
}
|
|
|
|
dwc3_check_params(dwc);
|
|
|
|
ret = dwc3_core_init_mode(dwc);
|
|
if (ret)
|
|
goto err5;
|
|
|
|
dwc3_debugfs_init(dwc);
|
|
pm_runtime_put(dev);
|
|
|
|
return 0;
|
|
|
|
err5:
|
|
dwc3_event_buffers_cleanup(dwc);
|
|
|
|
err4:
|
|
dwc3_free_scratch_buffers(dwc);
|
|
|
|
err3:
|
|
dwc3_free_event_buffers(dwc);
|
|
dwc3_ulpi_exit(dwc);
|
|
|
|
err2:
|
|
pm_runtime_allow(&pdev->dev);
|
|
|
|
err1:
|
|
pm_runtime_put_sync(&pdev->dev);
|
|
pm_runtime_disable(&pdev->dev);
|
|
|
|
err0:
|
|
/*
|
|
* restore res->start back to its original value so that, in case the
|
|
* probe is deferred, we don't end up getting error in request the
|
|
* memory region the next time probe is called.
|
|
*/
|
|
res->start -= DWC3_GLOBALS_REGS_START;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int dwc3_remove(struct platform_device *pdev)
|
|
{
|
|
struct dwc3 *dwc = platform_get_drvdata(pdev);
|
|
struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
|
|
pm_runtime_get_sync(&pdev->dev);
|
|
/*
|
|
* restore res->start back to its original value so that, in case the
|
|
* probe is deferred, we don't end up getting error in request the
|
|
* memory region the next time probe is called.
|
|
*/
|
|
res->start -= DWC3_GLOBALS_REGS_START;
|
|
|
|
dwc3_debugfs_exit(dwc);
|
|
dwc3_core_exit_mode(dwc);
|
|
|
|
dwc3_core_exit(dwc);
|
|
dwc3_ulpi_exit(dwc);
|
|
|
|
pm_runtime_put_sync(&pdev->dev);
|
|
pm_runtime_allow(&pdev->dev);
|
|
pm_runtime_disable(&pdev->dev);
|
|
|
|
dwc3_free_event_buffers(dwc);
|
|
dwc3_free_scratch_buffers(dwc);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
static int dwc3_suspend_common(struct dwc3 *dwc)
|
|
{
|
|
unsigned long flags;
|
|
|
|
switch (dwc->dr_mode) {
|
|
case USB_DR_MODE_PERIPHERAL:
|
|
case USB_DR_MODE_OTG:
|
|
spin_lock_irqsave(&dwc->lock, flags);
|
|
dwc3_gadget_suspend(dwc);
|
|
spin_unlock_irqrestore(&dwc->lock, flags);
|
|
break;
|
|
case USB_DR_MODE_HOST:
|
|
default:
|
|
/* do nothing */
|
|
break;
|
|
}
|
|
|
|
dwc3_core_exit(dwc);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dwc3_resume_common(struct dwc3 *dwc)
|
|
{
|
|
unsigned long flags;
|
|
int ret;
|
|
|
|
ret = dwc3_core_init(dwc);
|
|
if (ret)
|
|
return ret;
|
|
|
|
switch (dwc->dr_mode) {
|
|
case USB_DR_MODE_PERIPHERAL:
|
|
case USB_DR_MODE_OTG:
|
|
spin_lock_irqsave(&dwc->lock, flags);
|
|
dwc3_gadget_resume(dwc);
|
|
spin_unlock_irqrestore(&dwc->lock, flags);
|
|
/* FALLTHROUGH */
|
|
case USB_DR_MODE_HOST:
|
|
default:
|
|
/* do nothing */
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dwc3_runtime_checks(struct dwc3 *dwc)
|
|
{
|
|
switch (dwc->dr_mode) {
|
|
case USB_DR_MODE_PERIPHERAL:
|
|
case USB_DR_MODE_OTG:
|
|
if (dwc->connected)
|
|
return -EBUSY;
|
|
break;
|
|
case USB_DR_MODE_HOST:
|
|
default:
|
|
/* do nothing */
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dwc3_runtime_suspend(struct device *dev)
|
|
{
|
|
struct dwc3 *dwc = dev_get_drvdata(dev);
|
|
int ret;
|
|
|
|
if (dwc3_runtime_checks(dwc))
|
|
return -EBUSY;
|
|
|
|
ret = dwc3_suspend_common(dwc);
|
|
if (ret)
|
|
return ret;
|
|
|
|
device_init_wakeup(dev, true);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dwc3_runtime_resume(struct device *dev)
|
|
{
|
|
struct dwc3 *dwc = dev_get_drvdata(dev);
|
|
int ret;
|
|
|
|
device_init_wakeup(dev, false);
|
|
|
|
ret = dwc3_resume_common(dwc);
|
|
if (ret)
|
|
return ret;
|
|
|
|
switch (dwc->dr_mode) {
|
|
case USB_DR_MODE_PERIPHERAL:
|
|
case USB_DR_MODE_OTG:
|
|
dwc3_gadget_process_pending_events(dwc);
|
|
break;
|
|
case USB_DR_MODE_HOST:
|
|
default:
|
|
/* do nothing */
|
|
break;
|
|
}
|
|
|
|
pm_runtime_mark_last_busy(dev);
|
|
pm_runtime_put(dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dwc3_runtime_idle(struct device *dev)
|
|
{
|
|
struct dwc3 *dwc = dev_get_drvdata(dev);
|
|
|
|
switch (dwc->dr_mode) {
|
|
case USB_DR_MODE_PERIPHERAL:
|
|
case USB_DR_MODE_OTG:
|
|
if (dwc3_runtime_checks(dwc))
|
|
return -EBUSY;
|
|
break;
|
|
case USB_DR_MODE_HOST:
|
|
default:
|
|
/* do nothing */
|
|
break;
|
|
}
|
|
|
|
pm_runtime_mark_last_busy(dev);
|
|
pm_runtime_autosuspend(dev);
|
|
|
|
return 0;
|
|
}
|
|
#endif /* CONFIG_PM */
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
static int dwc3_suspend(struct device *dev)
|
|
{
|
|
struct dwc3 *dwc = dev_get_drvdata(dev);
|
|
int ret;
|
|
|
|
ret = dwc3_suspend_common(dwc);
|
|
if (ret)
|
|
return ret;
|
|
|
|
pinctrl_pm_select_sleep_state(dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dwc3_resume(struct device *dev)
|
|
{
|
|
struct dwc3 *dwc = dev_get_drvdata(dev);
|
|
int ret;
|
|
|
|
pinctrl_pm_select_default_state(dev);
|
|
|
|
ret = dwc3_resume_common(dwc);
|
|
if (ret)
|
|
return ret;
|
|
|
|
pm_runtime_disable(dev);
|
|
pm_runtime_set_active(dev);
|
|
pm_runtime_enable(dev);
|
|
|
|
return 0;
|
|
}
|
|
#endif /* CONFIG_PM_SLEEP */
|
|
|
|
static const struct dev_pm_ops dwc3_dev_pm_ops = {
|
|
SET_SYSTEM_SLEEP_PM_OPS(dwc3_suspend, dwc3_resume)
|
|
SET_RUNTIME_PM_OPS(dwc3_runtime_suspend, dwc3_runtime_resume,
|
|
dwc3_runtime_idle)
|
|
};
|
|
|
|
#ifdef CONFIG_OF
|
|
static const struct of_device_id of_dwc3_match[] = {
|
|
{
|
|
.compatible = "snps,dwc3"
|
|
},
|
|
{
|
|
.compatible = "synopsys,dwc3"
|
|
},
|
|
{ },
|
|
};
|
|
MODULE_DEVICE_TABLE(of, of_dwc3_match);
|
|
#endif
|
|
|
|
#ifdef CONFIG_ACPI
|
|
|
|
#define ACPI_ID_INTEL_BSW "808622B7"
|
|
|
|
static const struct acpi_device_id dwc3_acpi_match[] = {
|
|
{ ACPI_ID_INTEL_BSW, 0 },
|
|
{ },
|
|
};
|
|
MODULE_DEVICE_TABLE(acpi, dwc3_acpi_match);
|
|
#endif
|
|
|
|
static struct platform_driver dwc3_driver = {
|
|
.probe = dwc3_probe,
|
|
.remove = dwc3_remove,
|
|
.driver = {
|
|
.name = "dwc3",
|
|
.of_match_table = of_match_ptr(of_dwc3_match),
|
|
.acpi_match_table = ACPI_PTR(dwc3_acpi_match),
|
|
.pm = &dwc3_dev_pm_ops,
|
|
},
|
|
};
|
|
|
|
module_platform_driver(dwc3_driver);
|
|
|
|
MODULE_ALIAS("platform:dwc3");
|
|
MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
|
|
MODULE_LICENSE("GPL v2");
|
|
MODULE_DESCRIPTION("DesignWare USB3 DRD Controller Driver");
|