[linux-yocto] [PATCH 21/48] drivers/usb: Updated Axxia DWC3 Driver
Daniel Dragomir
daniel.dragomir at windriver.com
Mon Dec 11 05:13:51 PST 2017
From: John Jacques <john.jacques at intel.com>
Instead of using HCRST, use the GCTL register in the
controller and reset the PHYs individually.
Signed-off-by: John Jacques <john.jacques at intel.com>
---
drivers/usb/dwc3/Makefile | 7 +-
drivers/usb/dwc3/core-axxia.c | 1217 -----------------------------------------
2 files changed, 1 insertion(+), 1223 deletions(-)
delete mode 100644 drivers/usb/dwc3/core-axxia.c
diff --git a/drivers/usb/dwc3/Makefile b/drivers/usb/dwc3/Makefile
index 606a175..fce5665 100644
--- a/drivers/usb/dwc3/Makefile
+++ b/drivers/usb/dwc3/Makefile
@@ -2,12 +2,7 @@
CFLAGS_trace.o := -I$(src)
obj-$(CONFIG_USB_DWC3) += dwc3.o
-
-ifneq ($(CONFIG_USB_DWC3_AXXIA), )
- dwc3-y := core-axxia.o debug.o trace.o
-else
- dwc3-y := core.o debug.o trace.o
-endif
+dwc3-y := core.o debug.o trace.o
ifneq ($(filter y,$(CONFIG_USB_DWC3_HOST) $(CONFIG_USB_DWC3_DUAL_ROLE)),)
dwc3-y += host.o
diff --git a/drivers/usb/dwc3/core-axxia.c b/drivers/usb/dwc3/core-axxia.c
deleted file mode 100644
index 8a85c1a..0000000
--- a/drivers/usb/dwc3/core-axxia.c
+++ /dev/null
@@ -1,1217 +0,0 @@
-/**
- * core.c - DesignWare USB3 DRD Controller Core file
- *
- * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com
- *
- * Authors: Felipe Balbi <balbi at ti.com>,
- * Sebastian Andrzej Siewior <bigeasy at 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/usb/ch9.h>
-#include <linux/usb/gadget.h>
-#include <linux/usb/of.h>
-#include <linux/usb/otg.h>
-
-#include "platform_data.h"
-#include "core.h"
-#include "gadget.h"
-#include "io.h"
-
-#include "debug.h"
-
-/* -------------------------------------------------------------------------- */
-
-void dwc3_set_mode(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);
-}
-
-/**
- * dwc3_soft_reset - Issue soft reset
- * @dwc: Pointer to our controller context structure
- */
-static int dwc3_soft_reset(struct dwc3 *dwc)
-{
- unsigned long timeout;
- u32 reg;
-
- timeout = jiffies + msecs_to_jiffies(500);
- dwc3_writel(dwc->regs, DWC3_DCTL, DWC3_DCTL_CSFTRST);
- do {
- reg = dwc3_readl(dwc->regs, DWC3_DCTL);
- if (!(reg & DWC3_DCTL_CSFTRST))
- break;
-
- if (time_after(jiffies, timeout)) {
- dev_err(dwc->dev, "Reset Timed Out\n");
- return -ETIMEDOUT;
- }
-
- cpu_relax();
- } while (true);
-
- return 0;
-}
-
-static int axxia_dwc3_core_soft_reset(struct dwc3 *dwc)
-{
-
- int retValue = 0;
- unsigned int value;
- unsigned long address;
- int timeout;
- struct resource res;
- void __iomem *xhci_regs;
-
- struct device *dev = dwc->dev;
-
- res = dwc->xhci_resources[0];
- xhci_regs = devm_ioremap(dev, dwc->xhci_resources[0].start,
- (dwc->xhci_resources[0].end -
- dwc->xhci_resources[0].start));
- if (IS_ERR(xhci_regs))
- return -1;
-
- address = (unsigned long) (xhci_regs);
- value = readl((void __iomem *) (address + 0x20));
- value |= (1 << 1);
- writel(value, (void __iomem *) (address + 0x20));
-
- /*
- * The HCRST gets cleared by hardware after about 160 reads
- * (based on experimentation).
- */
-
- timeout = 1000;
-
- do {
- value = readl((void __iomem *) (address + 0x20));
- --timeout;
- } while ((0 != (value & (1 << 1))) && 0 < timeout);
-
- if (0 == timeout)
- retValue = -1;
-
- devm_iounmap(dev, xhci_regs);
-
- return retValue;
-}
-
-/*
- * dwc3_frame_length_adjustment - Adjusts frame length if required
- * @dwc3: Pointer to our controller context structure
- * @fladj: Value of GFLADJ_30MHZ to adjust frame length
- */
-static void dwc3_frame_length_adjustment(struct dwc3 *dwc, u32 fladj)
-{
- u32 reg;
- u32 dft;
-
- if (dwc->revision < DWC3_REVISION_250A)
- return;
-
- if (fladj == 0)
- return;
-
- reg = dwc3_readl(dwc->regs, DWC3_GFLADJ);
- dft = reg & DWC3_GFLADJ_30MHZ_MASK;
- if (!dev_WARN_ONCE(dwc->dev, dft == fladj,
- "request value same as default, ignoring\n")) {
- reg &= ~DWC3_GFLADJ_30MHZ_MASK;
- reg |= DWC3_GFLADJ_30MHZ_SDBND_SEL | 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->dev, 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 int 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->buf = dma_alloc_coherent(dwc->dev, 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;
- int i;
-
- for (i = 0; i < dwc->num_event_buffers; i++) {
- evt = dwc->ev_buffs[i];
- 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 int length)
-{
- int num;
- int i;
-
- num = DWC3_NUM_INT(dwc->hwparams.hwparams1);
- dwc->num_event_buffers = num;
-
- dwc->ev_buffs = devm_kzalloc(dwc->dev, sizeof(*dwc->ev_buffs) * num,
- GFP_KERNEL);
- if (!dwc->ev_buffs)
- return -ENOMEM;
-
- for (i = 0; i < num; i++) {
- 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_buffs[i] = 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;
- int n;
-
- for (n = 0; n < dwc->num_event_buffers; n++) {
- evt = dwc->ev_buffs[n];
- dev_dbg(dwc->dev, "Event buf %p dma %08llx length %d\n",
- evt->buf, (unsigned long long) evt->dma,
- evt->length);
-
- evt->lpos = 0;
-
- dwc3_writel(dwc->regs, DWC3_GEVNTADRLO(n),
- lower_32_bits(evt->dma));
- dwc3_writel(dwc->regs, DWC3_GEVNTADRHI(n),
- upper_32_bits(evt->dma));
- dwc3_writel(dwc->regs, DWC3_GEVNTSIZ(n),
- DWC3_GEVNTSIZ_SIZE(evt->length));
- dwc3_writel(dwc->regs, DWC3_GEVNTCOUNT(n), 0);
- }
-
- return 0;
-}
-
-static void dwc3_event_buffers_cleanup(struct dwc3 *dwc)
-{
- struct dwc3_event_buffer *evt;
- int n;
-
- for (n = 0; n < dwc->num_event_buffers; n++) {
- evt = dwc->ev_buffs[n];
-
- evt->lpos = 0;
-
- dwc3_writel(dwc->regs, DWC3_GEVNTADRLO(n), 0);
- dwc3_writel(dwc->regs, DWC3_GEVNTADRHI(n), 0);
- dwc3_writel(dwc->regs, DWC3_GEVNTSIZ(n), DWC3_GEVNTSIZ_INTMASK
- | DWC3_GEVNTSIZ_SIZE(0));
- dwc3_writel(dwc->regs, DWC3_GEVNTCOUNT(n), 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->dev, dwc->scratchbuf,
- dwc->nr_scratch * DWC3_SCRATCHBUF_SIZE,
- DMA_BIDIRECTIONAL);
- if (dma_mapping_error(dwc->dev, scratch_addr)) {
- dev_err(dwc->dev, "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->dev, 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->dev, 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_in_eps = DWC3_NUM_IN_EPS(parms);
- dwc->num_out_eps = DWC3_NUM_EPS(parms) - dwc->num_in_eps;
-
- dwc3_trace(trace_dwc3_core, "found %d IN and %d OUT endpoints",
- dwc->num_in_eps, dwc->num_out_eps);
-}
-
-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));
-
- /*
- * 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->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;
-
- 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 {
- dev_warn(dwc->dev, "HSPHY Interface not defined\n");
-
- /* Relying on default value. */
- if (!(reg & DWC3_GUSB2PHYCFG_ULPI_UTMI))
- break;
- }
- /* FALLTHROUGH */
- case DWC3_GHWPARAMS3_HSPHY_IFC_ULPI:
- /* Making sure the interface and PHY are operational */
- ret = dwc3_soft_reset(dwc);
- if (ret)
- return ret;
-
- udelay(1);
-
- ret = dwc3_ulpi_init(dwc);
- if (ret)
- return ret;
- /* FALLTHROUGH */
- 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;
-
- dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
-
- return 0;
-}
-
-/**
- * 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 hwparams4 = dwc->hwparams.hwparams4;
- u32 reg;
- int ret;
-
- 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 {
- 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 = axxia_dwc3_core_soft_reset(dwc);
- if (ret)
- goto err0;
-
- 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:
- dev_dbg(dwc->dev, "No power optimization available\n");
- }
-
- /* check if current dwc3 is on simulation board */
- if (dwc->hwparams.hwparams6 & DWC3_GHWPARAMS6_EN_FPGA) {
- dev_dbg(dwc->dev, "it is on FPGA board\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_core_num_eps(dwc);
-
- dwc3_writel(dwc->regs, DWC3_GCTL, reg);
-
- ret = dwc3_alloc_scratch_buffers(dwc);
- if (ret)
- goto err1;
-
- ret = dwc3_setup_scratch_buffers(dwc);
- if (ret)
- goto err2;
-
- return 0;
-
-err2:
- dwc3_free_scratch_buffers(dwc);
-
-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 void dwc3_core_exit(struct dwc3 *dwc)
-{
- dwc3_free_scratch_buffers(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);
-}
-
-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;
-
- 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;
-
- 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;
-
- 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;
-
- 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_mode(dwc, DWC3_GCTL_PRTCAP_DEVICE);
- ret = dwc3_gadget_init(dwc);
- if (ret) {
- dev_err(dev, "failed to initialize gadget\n");
- return ret;
- }
- break;
- case USB_DR_MODE_HOST:
- dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_HOST);
- ret = dwc3_host_init(dwc);
- if (ret) {
- dev_err(dev, "failed to initialize host\n");
- return ret;
- }
- break;
- case USB_DR_MODE_OTG:
- dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_OTG);
- ret = dwc3_host_init(dwc);
- if (ret) {
- dev_err(dev, "failed to initialize host\n");
- return ret;
- }
-
- ret = dwc3_gadget_init(dwc);
- if (ret) {
- dev_err(dev, "failed to initialize gadget\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_host_exit(dwc);
- dwc3_gadget_exit(dwc);
- break;
- default:
- /* do nothing */
- break;
- }
-}
-
-#define DWC3_ALIGN_MASK (16 - 1)
-
-static int dwc3_probe(struct platform_device *pdev)
-{
- struct device *dev = &pdev->dev;
- struct dwc3_platform_data *pdata = dev_get_platdata(dev);
- struct resource *res;
- struct dwc3 *dwc;
- u8 lpm_nyet_threshold;
- u8 tx_de_emphasis;
- u8 hird_threshold;
- u32 fladj = 0;
-
- int ret;
-
- void __iomem *regs;
- void *mem;
-
- mem = devm_kzalloc(dev, sizeof(*dwc) + DWC3_ALIGN_MASK, GFP_KERNEL);
- if (!mem)
- return -ENOMEM;
-
- dwc = PTR_ALIGN(mem, DWC3_ALIGN_MASK + 1);
- dwc->mem = mem;
- dwc->dev = dev;
-
- res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
- if (!res) {
- dev_err(dev, "missing IRQ\n");
- return -ENODEV;
- }
- dwc->xhci_resources[1].start = res->start;
- dwc->xhci_resources[1].end = res->end;
- dwc->xhci_resources[1].flags = res->flags;
- dwc->xhci_resources[1].name = res->name;
-
- 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);
-
- /* 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->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->needs_fifo_resize = device_property_read_bool(dev,
- "tx-fifo-resize");
-
- 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->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",
- &fladj);
-
- if (pdata) {
- dwc->maximum_speed = pdata->maximum_speed;
- dwc->has_lpm_erratum = pdata->has_lpm_erratum;
- if (pdata->lpm_nyet_threshold)
- lpm_nyet_threshold = pdata->lpm_nyet_threshold;
- dwc->is_utmi_l1_suspend = pdata->is_utmi_l1_suspend;
- if (pdata->hird_threshold)
- hird_threshold = pdata->hird_threshold;
-
- dwc->needs_fifo_resize = pdata->tx_fifo_resize;
- dwc->usb3_lpm_capable = pdata->usb3_lpm_capable;
- dwc->dr_mode = pdata->dr_mode;
-
- dwc->disable_scramble_quirk = pdata->disable_scramble_quirk;
- dwc->u2exit_lfps_quirk = pdata->u2exit_lfps_quirk;
- dwc->u2ss_inp3_quirk = pdata->u2ss_inp3_quirk;
- dwc->req_p1p2p3_quirk = pdata->req_p1p2p3_quirk;
- dwc->del_p1p2p3_quirk = pdata->del_p1p2p3_quirk;
- dwc->del_phy_power_chg_quirk = pdata->del_phy_power_chg_quirk;
- dwc->lfps_filter_quirk = pdata->lfps_filter_quirk;
- dwc->rx_detect_poll_quirk = pdata->rx_detect_poll_quirk;
- dwc->dis_u3_susphy_quirk = pdata->dis_u3_susphy_quirk;
- dwc->dis_u2_susphy_quirk = pdata->dis_u2_susphy_quirk;
- dwc->dis_enblslpm_quirk = pdata->dis_enblslpm_quirk;
-
- dwc->tx_de_emphasis_quirk = pdata->tx_de_emphasis_quirk;
- if (pdata->tx_de_emphasis)
- tx_de_emphasis = pdata->tx_de_emphasis;
-
- dwc->hsphy_interface = pdata->hsphy_interface;
- fladj = pdata->fladj_value;
- }
-
- /* default to superspeed if no maximum_speed passed */
- if (dwc->maximum_speed == USB_SPEED_UNKNOWN)
- dwc->maximum_speed = USB_SPEED_SUPER;
-
- 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);
-
- platform_set_drvdata(pdev, dwc);
- dwc3_cache_hwparams(dwc);
-
- ret = dwc3_phy_setup(dwc);
- if (ret)
- goto err0;
-
- ret = dwc3_core_get_phy(dwc);
- if (ret)
- goto err0;
-
- spin_lock_init(&dwc->lock);
-
- if (!dev->dma_mask) {
- dev->dma_mask = dev->parent->dma_mask;
- dev->dma_parms = dev->parent->dma_parms;
- dma_set_coherent_mask(dev, dev->parent->coherent_dma_mask);
- }
-
- pm_runtime_enable(dev);
- pm_runtime_get_sync(dev);
- 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 err1;
- }
-
- if (IS_ENABLED(CONFIG_USB_DWC3_HOST))
- dwc->dr_mode = USB_DR_MODE_HOST;
- else if (IS_ENABLED(CONFIG_USB_DWC3_GADGET))
- dwc->dr_mode = USB_DR_MODE_PERIPHERAL;
-
- if (dwc->dr_mode == USB_DR_MODE_UNKNOWN)
- dwc->dr_mode = USB_DR_MODE_OTG;
-
- ret = dwc3_core_init(dwc);
- if (ret) {
- dev_err(dev, "failed to initialize core\n");
- goto err1;
- }
-
- /* Adjust Frame Length */
- dwc3_frame_length_adjustment(dwc, fladj);
-
- 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;
- }
-
- ret = dwc3_core_init_mode(dwc);
- if (ret)
- goto err5;
-
- dwc3_debugfs_init(dwc);
- pm_runtime_allow(dev);
-
- return 0;
-
-err5:
- dwc3_event_buffers_cleanup(dwc);
-
-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);
- dwc3_core_exit(dwc);
-
-err1:
- dwc3_free_event_buffers(dwc);
- dwc3_ulpi_exit(dwc);
-
-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);
-
- /*
- * 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_event_buffers_cleanup(dwc);
- dwc3_free_event_buffers(dwc);
-
- 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);
-
- dwc3_core_exit(dwc);
- dwc3_ulpi_exit(dwc);
-
- pm_runtime_put_sync(&pdev->dev);
- pm_runtime_disable(&pdev->dev);
-
- return 0;
-}
-
-#ifdef CONFIG_PM_SLEEP
-
-static int dwc3_suspend(struct device *dev)
-{
- struct dwc3 *dwc = dev_get_drvdata(dev);
- unsigned long flags;
-
- spin_lock_irqsave(&dwc->lock, flags);
-
- switch (dwc->dr_mode) {
- case USB_DR_MODE_PERIPHERAL:
- case USB_DR_MODE_OTG:
- dwc3_gadget_suspend(dwc);
- /* FALLTHROUGH */
- case USB_DR_MODE_HOST:
- default:
- dwc3_event_buffers_cleanup(dwc);
- break;
- }
-
- dwc->gctl = dwc3_readl(dwc->regs, DWC3_GCTL);
- spin_unlock_irqrestore(&dwc->lock, flags);
-
- usb_phy_shutdown(dwc->usb3_phy);
- usb_phy_shutdown(dwc->usb2_phy);
- phy_exit(dwc->usb2_generic_phy);
- phy_exit(dwc->usb3_generic_phy);
-
- return 0;
-}
-
-static int dwc3_resume(struct device *dev)
-{
- struct dwc3 *dwc = dev_get_drvdata(dev);
- unsigned long flags;
- int ret;
-
- usb_phy_init(dwc->usb3_phy);
- usb_phy_init(dwc->usb2_phy);
- ret = phy_init(dwc->usb2_generic_phy);
- if (ret < 0)
- return ret;
-
- ret = phy_init(dwc->usb3_generic_phy);
- if (ret < 0)
- goto err_usb2phy_init;
-
- spin_lock_irqsave(&dwc->lock, flags);
-
- dwc3_event_buffers_setup(dwc);
- dwc3_writel(dwc->regs, DWC3_GCTL, dwc->gctl);
-
- switch (dwc->dr_mode) {
- case USB_DR_MODE_PERIPHERAL:
- case USB_DR_MODE_OTG:
- dwc3_gadget_resume(dwc);
- /* FALLTHROUGH */
- case USB_DR_MODE_HOST:
- default:
- /* do nothing */
- break;
- }
-
- spin_unlock_irqrestore(&dwc->lock, flags);
-
- pm_runtime_disable(dev);
- pm_runtime_set_active(dev);
- pm_runtime_enable(dev);
-
- return 0;
-
-err_usb2phy_init:
- phy_exit(dwc->usb2_generic_phy);
-
- return ret;
-}
-
-static const struct dev_pm_ops dwc3_dev_pm_ops = {
- SET_SYSTEM_SLEEP_PM_OPS(dwc3_suspend, dwc3_resume)
-};
-
-#define DWC3_PM_OPS (&(dwc3_dev_pm_ops))
-#else
-#define DWC3_PM_OPS NULL
-#endif
-
-#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_PM_OPS,
- },
-};
-
-module_platform_driver(dwc3_driver);
-
-MODULE_ALIAS("platform:dwc3");
-MODULE_AUTHOR("Felipe Balbi <balbi at ti.com>");
-MODULE_LICENSE("GPL v2");
-MODULE_DESCRIPTION("DesignWare USB3 DRD Controller Driver");
--
2.7.4
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