diff options
Diffstat (limited to 'drivers/usb/dwc3')
-rw-r--r-- | drivers/usb/dwc3/Kconfig | 7 | ||||
-rw-r--r-- | drivers/usb/dwc3/Makefile | 4 | ||||
-rw-r--r-- | drivers/usb/dwc3/core.c | 108 | ||||
-rw-r--r-- | drivers/usb/dwc3/core.h | 26 | ||||
-rw-r--r-- | drivers/usb/dwc3/dwc3-pci.c | 36 | ||||
-rw-r--r-- | drivers/usb/dwc3/gadget.c | 10 | ||||
-rw-r--r-- | drivers/usb/dwc3/platform_data.h | 2 | ||||
-rw-r--r-- | drivers/usb/dwc3/ulpi.c | 91 |
8 files changed, 258 insertions, 26 deletions
diff --git a/drivers/usb/dwc3/Kconfig b/drivers/usb/dwc3/Kconfig index 827c4f8..473bfaa 100644 --- a/drivers/usb/dwc3/Kconfig +++ b/drivers/usb/dwc3/Kconfig @@ -11,6 +11,13 @@ config USB_DWC3 if USB_DWC3 +config USB_DWC3_ULPI + bool "Register ULPI PHY Interface" + depends on USB_ULPI_BUS=y || USB_ULPI_BUS=USB_DWC3 + help + Select this if you have ULPI type PHY attached to your DWC3 + controller. + choice bool "DWC3 Mode Selection" default USB_DWC3_DUAL_ROLE if (USB && USB_GADGET) diff --git a/drivers/usb/dwc3/Makefile b/drivers/usb/dwc3/Makefile index 46172f4..c7076e3 100644 --- a/drivers/usb/dwc3/Makefile +++ b/drivers/usb/dwc3/Makefile @@ -15,6 +15,10 @@ ifneq ($(filter y,$(CONFIG_USB_DWC3_GADGET) $(CONFIG_USB_DWC3_DUAL_ROLE)),) dwc3-y += gadget.o ep0.o endif +ifneq ($(CONFIG_USB_DWC3_ULPI),) + dwc3-y += ulpi.o +endif + ifneq ($(CONFIG_DEBUG_FS),) dwc3-y += debugfs.o endif diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c index 2bbab3d..5c110d8 100644 --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -117,6 +117,33 @@ static int dwc3_core_soft_reset(struct dwc3 *dwc) } /** + * 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; +} + +/** * dwc3_free_one_event_buffer - Frees one event buffer * @dwc: Pointer to our controller context structure * @evt: Pointer to event buffer to be freed @@ -367,10 +394,15 @@ static void dwc3_cache_hwparams(struct dwc3 *dwc) /** * 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 void dwc3_phy_setup(struct dwc3 *dwc) +static int dwc3_phy_setup(struct dwc3 *dwc) { u32 reg; + int ret; reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0)); @@ -409,10 +441,41 @@ static void dwc3_phy_setup(struct dwc3 *dwc) dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg); - mdelay(100); - 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 (!strncmp(dwc->hsphy_interface, "utmi", 4)) { + reg &= ~DWC3_GUSB2PHYCFG_ULPI_UTMI; + break; + } else if (!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 @@ -427,7 +490,7 @@ static void dwc3_phy_setup(struct dwc3 *dwc) dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg); - mdelay(100); + return 0; } /** @@ -438,7 +501,6 @@ static void dwc3_phy_setup(struct dwc3 *dwc) */ static int dwc3_core_init(struct dwc3 *dwc) { - unsigned long timeout; u32 hwparams4 = dwc->hwparams.hwparams4; u32 reg; int ret; @@ -466,21 +528,9 @@ static int dwc3_core_init(struct dwc3 *dwc) } /* issue device SoftReset too */ - 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"); - ret = -ETIMEDOUT; - goto err0; - } - - cpu_relax(); - } while (true); + ret = dwc3_soft_reset(dwc); + if (ret) + goto err0; ret = dwc3_core_soft_reset(dwc); if (ret) @@ -555,8 +605,6 @@ static int dwc3_core_init(struct dwc3 *dwc) dwc3_writel(dwc->regs, DWC3_GCTL, reg); - dwc3_phy_setup(dwc); - ret = dwc3_alloc_scratch_buffers(dwc); if (ret) goto err1; @@ -836,6 +884,8 @@ static int dwc3_probe(struct platform_device *pdev) "snps,tx_de_emphasis_quirk"); of_property_read_u8(node, "snps,tx_de_emphasis", &tx_de_emphasis); + of_property_read_string(node, "snps,hsphy_interface", + &dwc->hsphy_interface); } else if (pdata) { dwc->maximum_speed = pdata->maximum_speed; dwc->has_lpm_erratum = pdata->has_lpm_erratum; @@ -863,6 +913,8 @@ static int dwc3_probe(struct platform_device *pdev) 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; } /* default to superspeed if no maximum_speed passed */ @@ -875,12 +927,18 @@ static int dwc3_probe(struct platform_device *pdev) 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); - platform_set_drvdata(pdev, dwc); if (!dev->dma_mask) { dev->dma_mask = dev->parent->dma_mask; @@ -892,8 +950,6 @@ static int dwc3_probe(struct platform_device *pdev) pm_runtime_get_sync(dev); pm_runtime_forbid(dev); - dwc3_cache_hwparams(dwc); - ret = dwc3_alloc_event_buffers(dwc, DWC3_EVENT_BUFFERS_SIZE); if (ret) { dev_err(dwc->dev, "failed to allocate event buffers\n"); @@ -964,6 +1020,7 @@ err2: err1: dwc3_free_event_buffers(dwc); + dwc3_ulpi_exit(dwc); err0: /* @@ -999,6 +1056,7 @@ static int dwc3_remove(struct platform_device *pdev) 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); diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h index fdab715..d70da20 100644 --- a/drivers/usb/dwc3/core.h +++ b/drivers/usb/dwc3/core.h @@ -30,6 +30,7 @@ #include <linux/usb/ch9.h> #include <linux/usb/gadget.h> #include <linux/usb/otg.h> +#include <linux/ulpi/interface.h> #include <linux/phy/phy.h> @@ -173,6 +174,15 @@ /* Global USB2 PHY Configuration Register */ #define DWC3_GUSB2PHYCFG_PHYSOFTRST (1 << 31) #define DWC3_GUSB2PHYCFG_SUSPHY (1 << 6) +#define DWC3_GUSB2PHYCFG_ULPI_UTMI (1 << 4) + +/* Global USB2 PHY Vendor Control Register */ +#define DWC3_GUSB2PHYACC_NEWREGREQ (1 << 25) +#define DWC3_GUSB2PHYACC_BUSY (1 << 23) +#define DWC3_GUSB2PHYACC_WRITE (1 << 22) +#define DWC3_GUSB2PHYACC_ADDR(n) (n << 16) +#define DWC3_GUSB2PHYACC_EXTEND_ADDR(n) (n << 8) +#define DWC3_GUSB2PHYACC_DATA(n) (n & 0xff) /* Global USB3 PIPE Control Register */ #define DWC3_GUSB3PIPECTL_PHYSOFTRST (1 << 31) @@ -652,6 +662,7 @@ struct dwc3_scratchpad_array { * @usb3_phy: pointer to USB3 PHY * @usb2_generic_phy: pointer to USB2 PHY * @usb3_generic_phy: pointer to USB3 PHY + * @ulpi: pointer to ulpi interface * @dcfg: saved contents of DCFG register * @gctl: saved contents of GCTL register * @isoch_delay: wValue from Set Isochronous Delay request; @@ -673,6 +684,7 @@ struct dwc3_scratchpad_array { * @test_mode_nr: test feature selector * @lpm_nyet_threshold: LPM NYET response threshold * @hird_threshold: HIRD threshold + * @hsphy_interface: "utmi" or "ulpi" * @delayed_status: true when gadget driver asks for delayed status * @ep0_bounced: true when we used bounce buffer * @ep0_expect_in: true when we expect a DATA IN transfer @@ -739,6 +751,8 @@ struct dwc3 { struct phy *usb2_generic_phy; struct phy *usb3_generic_phy; + struct ulpi *ulpi; + void __iomem *regs; size_t regs_size; @@ -800,6 +814,8 @@ struct dwc3 { u8 lpm_nyet_threshold; u8 hird_threshold; + const char *hsphy_interface; + unsigned delayed_status:1; unsigned ep0_bounced:1; unsigned ep0_expect_in:1; @@ -1035,4 +1051,14 @@ static inline int dwc3_gadget_resume(struct dwc3 *dwc) } #endif /* !IS_ENABLED(CONFIG_USB_DWC3_HOST) */ +#if IS_ENABLED(CONFIG_USB_DWC3_ULPI) +int dwc3_ulpi_init(struct dwc3 *dwc); +void dwc3_ulpi_exit(struct dwc3 *dwc); +#else +static inline int dwc3_ulpi_init(struct dwc3 *dwc) +{ return 0; } +static inline void dwc3_ulpi_exit(struct dwc3 *dwc) +{ } +#endif + #endif /* __DRIVERS_USB_DWC3_CORE_H */ diff --git a/drivers/usb/dwc3/dwc3-pci.c b/drivers/usb/dwc3/dwc3-pci.c index b773fb5..27e4fc8 100644 --- a/drivers/usb/dwc3/dwc3-pci.c +++ b/drivers/usb/dwc3/dwc3-pci.c @@ -21,6 +21,8 @@ #include <linux/slab.h> #include <linux/pci.h> #include <linux/platform_device.h> +#include <linux/gpio/consumer.h> +#include <linux/acpi.h> #include "platform_data.h" @@ -31,6 +33,15 @@ #define PCI_DEVICE_ID_INTEL_SPTLP 0x9d30 #define PCI_DEVICE_ID_INTEL_SPTH 0xa130 +static const struct acpi_gpio_params reset_gpios = { 0, 0, false }; +static const struct acpi_gpio_params cs_gpios = { 1, 0, false }; + +static const struct acpi_gpio_mapping acpi_dwc3_byt_gpios[] = { + { "reset-gpios", &reset_gpios, 1 }, + { "cs-gpios", &cs_gpios, 1 }, + { }, +}; + static int dwc3_pci_quirks(struct pci_dev *pdev) { if (pdev->vendor == PCI_VENDOR_ID_AMD && @@ -65,6 +76,30 @@ static int dwc3_pci_quirks(struct pci_dev *pdev) sizeof(pdata)); } + if (pdev->vendor == PCI_VENDOR_ID_INTEL && + pdev->device == PCI_DEVICE_ID_INTEL_BYT) { + struct gpio_desc *gpio; + + acpi_dev_add_driver_gpios(ACPI_COMPANION(&pdev->dev), + acpi_dwc3_byt_gpios); + + /* These GPIOs will turn on the USB2 PHY */ + gpio = gpiod_get(&pdev->dev, "cs"); + if (!IS_ERR(gpio)) { + gpiod_direction_output(gpio, 0); + gpiod_set_value_cansleep(gpio, 1); + gpiod_put(gpio); + } + + gpio = gpiod_get(&pdev->dev, "reset"); + if (!IS_ERR(gpio)) { + gpiod_direction_output(gpio, 0); + gpiod_set_value_cansleep(gpio, 1); + gpiod_put(gpio); + usleep_range(10000, 11000); + } + } + return 0; } @@ -128,6 +163,7 @@ err: static void dwc3_pci_remove(struct pci_dev *pci) { + acpi_dev_remove_driver_gpios(ACPI_COMPANION(&pci->dev)); platform_device_unregister(pci_get_drvdata(pci)); } diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 8946c32..333a7c0 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -291,6 +291,8 @@ int dwc3_send_gadget_generic_command(struct dwc3 *dwc, unsigned cmd, u32 param) dwc3_trace(trace_dwc3_gadget, "Command Complete --> %d", DWC3_DGCMD_STATUS(reg)); + if (DWC3_DGCMD_STATUS(reg)) + return -EINVAL; return 0; } @@ -328,6 +330,8 @@ int dwc3_send_gadget_ep_cmd(struct dwc3 *dwc, unsigned ep, dwc3_trace(trace_dwc3_gadget, "Command Complete --> %d", DWC3_DEPCMD_STATUS(reg)); + if (DWC3_DEPCMD_STATUS(reg)) + return -EINVAL; return 0; } @@ -1902,12 +1906,16 @@ static void dwc3_endpoint_transfer_complete(struct dwc3 *dwc, { unsigned status = 0; int clean_busy; + u32 is_xfer_complete; + + is_xfer_complete = (event->endpoint_event == DWC3_DEPEVT_XFERCOMPLETE); if (event->status & DEPEVT_STATUS_BUSERR) status = -ECONNRESET; clean_busy = dwc3_cleanup_done_reqs(dwc, dep, event, status); - if (clean_busy) + if (clean_busy && (is_xfer_complete || + usb_endpoint_xfer_isoc(dep->endpoint.desc))) dep->flags &= ~DWC3_EP_BUSY; /* diff --git a/drivers/usb/dwc3/platform_data.h b/drivers/usb/dwc3/platform_data.h index a2bd464..d3614ec 100644 --- a/drivers/usb/dwc3/platform_data.h +++ b/drivers/usb/dwc3/platform_data.h @@ -45,4 +45,6 @@ struct dwc3_platform_data { unsigned tx_de_emphasis_quirk:1; unsigned tx_de_emphasis:2; + + const char *hsphy_interface; }; diff --git a/drivers/usb/dwc3/ulpi.c b/drivers/usb/dwc3/ulpi.c new file mode 100644 index 0000000..ec004c6 --- /dev/null +++ b/drivers/usb/dwc3/ulpi.c @@ -0,0 +1,91 @@ +/** + * ulpi.c - DesignWare USB3 Controller's ULPI PHY interface + * + * Copyright (C) 2015 Intel Corporation + * + * Author: Heikki Krogerus <heikki.krogerus@linux.intel.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/ulpi/regs.h> + +#include "core.h" +#include "io.h" + +#define DWC3_ULPI_ADDR(a) \ + ((a >= ULPI_EXT_VENDOR_SPECIFIC) ? \ + DWC3_GUSB2PHYACC_ADDR(ULPI_ACCESS_EXTENDED) | \ + DWC3_GUSB2PHYACC_EXTEND_ADDR(a) : DWC3_GUSB2PHYACC_ADDR(a)) + +static int dwc3_ulpi_busyloop(struct dwc3 *dwc) +{ + unsigned count = 1000; + u32 reg; + + while (count--) { + reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYACC(0)); + if (!(reg & DWC3_GUSB2PHYACC_BUSY)) + return 0; + cpu_relax(); + } + + return -ETIMEDOUT; +} + +static int dwc3_ulpi_read(struct ulpi_ops *ops, u8 addr) +{ + struct dwc3 *dwc = dev_get_drvdata(ops->dev); + u32 reg; + int ret; + + reg = DWC3_GUSB2PHYACC_NEWREGREQ | DWC3_ULPI_ADDR(addr); + dwc3_writel(dwc->regs, DWC3_GUSB2PHYACC(0), reg); + + ret = dwc3_ulpi_busyloop(dwc); + if (ret) + return ret; + + reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYACC(0)); + + return DWC3_GUSB2PHYACC_DATA(reg); +} + +static int dwc3_ulpi_write(struct ulpi_ops *ops, u8 addr, u8 val) +{ + struct dwc3 *dwc = dev_get_drvdata(ops->dev); + u32 reg; + + reg = DWC3_GUSB2PHYACC_NEWREGREQ | DWC3_ULPI_ADDR(addr); + reg |= DWC3_GUSB2PHYACC_WRITE | val; + dwc3_writel(dwc->regs, DWC3_GUSB2PHYACC(0), reg); + + return dwc3_ulpi_busyloop(dwc); +} + +static struct ulpi_ops dwc3_ulpi_ops = { + .read = dwc3_ulpi_read, + .write = dwc3_ulpi_write, +}; + +int dwc3_ulpi_init(struct dwc3 *dwc) +{ + /* Register the interface */ + dwc->ulpi = ulpi_register_interface(dwc->dev, &dwc3_ulpi_ops); + if (IS_ERR(dwc->ulpi)) { + dev_err(dwc->dev, "failed to register ULPI interface"); + return PTR_ERR(dwc->ulpi); + } + + return 0; +} + +void dwc3_ulpi_exit(struct dwc3 *dwc) +{ + if (dwc->ulpi) { + ulpi_unregister_interface(dwc->ulpi); + dwc->ulpi = NULL; + } +} |