| // SPDX-License-Identifier: GPL-2.0 |
| /** |
| * 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> |
| */ |
| |
| #include <linux/clk.h> |
| #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/reset.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; |
| |
| /* |
| * dwc_usb31 does not support OTG mode. If the controller |
| * supports DRD but the dr_mode is not specified or set to OTG, |
| * then set the mode to peripheral. |
| */ |
| if (mode == USB_DR_MODE_OTG && dwc3_is_usb31(dwc)) |
| 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; |
| } |
| |
| 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); |
| |
| dwc->current_dr_role = mode; |
| } |
| |
| static void __dwc3_set_mode(struct work_struct *work) |
| { |
| struct dwc3 *dwc = work_to_dwc(work); |
| unsigned long flags; |
| int ret; |
| |
| if (dwc->dr_mode != USB_DR_MODE_OTG) |
| return; |
| |
| if (dwc->current_dr_role == DWC3_GCTL_PRTCAP_OTG) |
| dwc3_otg_update(dwc, 0); |
| |
| if (!dwc->desired_dr_role) |
| return; |
| |
| if (dwc->desired_dr_role == dwc->current_dr_role) |
| return; |
| |
| if (dwc->desired_dr_role == DWC3_GCTL_PRTCAP_OTG && dwc->edev) |
| 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; |
| case DWC3_GCTL_PRTCAP_OTG: |
| dwc3_otg_exit(dwc); |
| spin_lock_irqsave(&dwc->lock, flags); |
| dwc->desired_otg_role = DWC3_OTG_ROLE_IDLE; |
| spin_unlock_irqrestore(&dwc->lock, flags); |
| dwc3_otg_update(dwc, 1); |
| break; |
| default: |
| break; |
| } |
| |
| spin_lock_irqsave(&dwc->lock, flags); |
| |
| dwc3_set_prtcap(dwc, 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); |
| phy_set_mode(dwc->usb2_generic_phy, PHY_MODE_USB_HOST); |
| phy_set_mode(dwc->usb3_generic_phy, PHY_MODE_USB_HOST); |
| phy_calibrate(dwc->usb2_generic_phy); |
| } |
| break; |
| case DWC3_GCTL_PRTCAP_DEVICE: |
| dwc3_event_buffers_setup(dwc); |
| |
| if (dwc->usb2_phy) |
| otg_set_vbus(dwc->usb2_phy->otg, false); |
| phy_set_mode(dwc->usb2_generic_phy, PHY_MODE_USB_DEVICE); |
| phy_set_mode(dwc->usb3_generic_phy, PHY_MODE_USB_DEVICE); |
| |
| ret = dwc3_gadget_init(dwc); |
| if (ret) |
| dev_err(dwc->dev, "failed to initialize peripheral\n"); |
| break; |
| case DWC3_GCTL_PRTCAP_OTG: |
| dwc3_otg_init(dwc); |
| dwc3_otg_update(dwc, 0); |
| 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_freezable_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->current_dr_role == DWC3_GCTL_PRTCAP_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)) |
| goto done; |
| |
| udelay(1); |
| } while (--retries); |
| |
| phy_exit(dwc->usb3_generic_phy); |
| phy_exit(dwc->usb2_generic_phy); |
| |
| return -ETIMEDOUT; |
| |
| done: |
| /* |
| * For DWC_usb31 controller, once DWC3_DCTL_CSFTRST bit is cleared, |
| * we must wait at least 50ms before accessing the PHY domain |
| * (synchronization delay). DWC_usb31 programming guide section 1.3.2. |
| */ |
| if (dwc3_is_usb31(dwc)) |
| msleep(50); |
| |
| return 0; |
| } |
| |
| static const struct clk_bulk_data dwc3_core_clks[] = { |
| { .id = "ref" }, |
| { .id = "bus_early" }, |
| { .id = "suspend" }, |
| }; |
| |
| /* |
| * 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 (dft != dwc->fladj) { |
| 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. |
| */ |
| 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; |
| } |
| |
| 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); |
| } |
| |
| static int dwc3_core_ulpi_init(struct dwc3 *dwc) |
| { |
| int intf; |
| int ret = 0; |
| |
| intf = DWC3_GHWPARAMS3_HSPHY_IFC(dwc->hwparams.hwparams3); |
| |
| if (intf == DWC3_GHWPARAMS3_HSPHY_IFC_ULPI || |
| (intf == DWC3_GHWPARAMS3_HSPHY_IFC_UTMI_ULPI && |
| dwc->hsphy_interface && |
| !strncmp(dwc->hsphy_interface, "ulpi", 4))) |
| ret = dwc3_ulpi_init(dwc); |
| |
| return ret; |
| } |
| |
| /** |
| * 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; |
| |
| 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: |
| /* 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); |
| clk_bulk_disable(dwc->num_clks, dwc->clks); |
| clk_bulk_unprepare(dwc->num_clks, dwc->clks); |
| reset_control_assert(dwc->reset); |
| } |
| |
| 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); |
| static int dwc3_core_ulpi_init(struct dwc3 *dwc); |
| |
| /* set global incr burst type configuration registers */ |
| static void dwc3_set_incr_burst_type(struct dwc3 *dwc) |
| { |
| struct device *dev = dwc->dev; |
| /* incrx_mode : for INCR burst type. */ |
| bool incrx_mode; |
| /* incrx_size : for size of INCRX burst. */ |
| u32 incrx_size; |
| u32 *vals; |
| u32 cfg; |
| int ntype; |
| int ret; |
| int i; |
| |
| cfg = dwc3_readl(dwc->regs, DWC3_GSBUSCFG0); |
| |
| /* |
| * Handle property "snps,incr-burst-type-adjustment". |
| * Get the number of value from this property: |
| * result <= 0, means this property is not supported. |
| * result = 1, means INCRx burst mode supported. |
| * result > 1, means undefined length burst mode supported. |
| */ |
| ntype = device_property_read_u32_array(dev, |
| "snps,incr-burst-type-adjustment", NULL, 0); |
| if (ntype <= 0) |
| return; |
| |
| vals = kcalloc(ntype, sizeof(u32), GFP_KERNEL); |
| if (!vals) { |
| dev_err(dev, "Error to get memory\n"); |
| return; |
| } |
| |
| /* Get INCR burst type, and parse it */ |
| ret = device_property_read_u32_array(dev, |
| "snps,incr-burst-type-adjustment", vals, ntype); |
| if (ret) { |
| dev_err(dev, "Error to get property\n"); |
| return; |
| } |
| |
| incrx_size = *vals; |
| |
| if (ntype > 1) { |
| /* INCRX (undefined length) burst mode */ |
| incrx_mode = INCRX_UNDEF_LENGTH_BURST_MODE; |
| for (i = 1; i < ntype; i++) { |
| if (vals[i] > incrx_size) |
| incrx_size = vals[i]; |
| } |
| } else { |
| /* INCRX burst mode */ |
| incrx_mode = INCRX_BURST_MODE; |
| } |
| |
| /* Enable Undefined Length INCR Burst and Enable INCRx Burst */ |
| cfg &= ~DWC3_GSBUSCFG0_INCRBRST_MASK; |
| if (incrx_mode) |
| cfg |= DWC3_GSBUSCFG0_INCRBRSTENA; |
| switch (incrx_size) { |
| case 256: |
| cfg |= DWC3_GSBUSCFG0_INCR256BRSTENA; |
| break; |
| case 128: |
| cfg |= DWC3_GSBUSCFG0_INCR128BRSTENA; |
| break; |
| case 64: |
| cfg |= DWC3_GSBUSCFG0_INCR64BRSTENA; |
| break; |
| case 32: |
| cfg |= DWC3_GSBUSCFG0_INCR32BRSTENA; |
| break; |
| case 16: |
| cfg |= DWC3_GSBUSCFG0_INCR16BRSTENA; |
| break; |
| case 8: |
| cfg |= DWC3_GSBUSCFG0_INCR8BRSTENA; |
| break; |
| case 4: |
| cfg |= DWC3_GSBUSCFG0_INCR4BRSTENA; |
| break; |
| case 1: |
| break; |
| default: |
| dev_err(dev, "Invalid property\n"); |
| break; |
| } |
| |
| dwc3_writel(dwc->regs, DWC3_GSBUSCFG0, cfg); |
| } |
| |
| /** |
| * 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_phy_setup(dwc); |
| if (ret) |
| goto err0; |
| |
| if (!dwc->ulpi_ready) { |
| ret = dwc3_core_ulpi_init(dwc); |
| if (ret) |
| goto err0; |
| dwc->ulpi_ready = true; |
| } |
| |
| if (!dwc->phys_ready) { |
| ret = dwc3_core_get_phy(dwc); |
| if (ret) |
| goto err0a; |
| dwc->phys_ready = true; |
| } |
| |
| ret = dwc3_core_soft_reset(dwc); |
| if (ret) |
| goto err0a; |
| |
| 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); |
| |
| dwc3_set_incr_burst_type(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; |
| |
| if (dwc->parkmode_disable_ss_quirk) |
| reg |= DWC3_GUCTL1_PARKMODE_DISABLE_SS; |
| |
| dwc3_writel(dwc->regs, DWC3_GUCTL1, reg); |
| } |
| |
| if (dwc->dr_mode == USB_DR_MODE_HOST || |
| dwc->dr_mode == USB_DR_MODE_OTG) { |
| reg = dwc3_readl(dwc->regs, DWC3_GUCTL); |
| |
| /* |
| * Enable Auto retry Feature to make the controller operating in |
| * Host mode on seeing transaction errors(CRC errors or internal |
| * overrun scenerios) on IN transfers to reply to the device |
| * with a non-terminating retry ACK (i.e, an ACK transcation |
| * packet with Retry=1 & Nump != 0) |
| */ |
| reg |= DWC3_GUCTL_HSTINAUTORETRY; |
| |
| dwc3_writel(dwc->regs, DWC3_GUCTL, reg); |
| } |
| |
| /* |
| * Must config both number of packets and max burst settings to enable |
| * RX and/or TX threshold. |
| */ |
| if (dwc3_is_usb31(dwc) && dwc->dr_mode == USB_DR_MODE_HOST) { |
| u8 rx_thr_num = dwc->rx_thr_num_pkt_prd; |
| u8 rx_maxburst = dwc->rx_max_burst_prd; |
| u8 tx_thr_num = dwc->tx_thr_num_pkt_prd; |
| u8 tx_maxburst = dwc->tx_max_burst_prd; |
| |
| if (rx_thr_num && rx_maxburst) { |
| reg = dwc3_readl(dwc->regs, DWC3_GRXTHRCFG); |
| reg |= DWC31_RXTHRNUMPKTSEL_PRD; |
| |
| reg &= ~DWC31_RXTHRNUMPKT_PRD(~0); |
| reg |= DWC31_RXTHRNUMPKT_PRD(rx_thr_num); |
| |
| reg &= ~DWC31_MAXRXBURSTSIZE_PRD(~0); |
| reg |= DWC31_MAXRXBURSTSIZE_PRD(rx_maxburst); |
| |
| dwc3_writel(dwc->regs, DWC3_GRXTHRCFG, reg); |
| } |
| |
| if (tx_thr_num && tx_maxburst) { |
| reg = dwc3_readl(dwc->regs, DWC3_GTXTHRCFG); |
| reg |= DWC31_TXTHRNUMPKTSEL_PRD; |
| |
| reg &= ~DWC31_TXTHRNUMPKT_PRD(~0); |
| reg |= DWC31_TXTHRNUMPKT_PRD(tx_thr_num); |
| |
| reg &= ~DWC31_MAXTXBURSTSIZE_PRD(~0); |
| reg |= DWC31_MAXTXBURSTSIZE_PRD(tx_maxburst); |
| |
| dwc3_writel(dwc->regs, DWC3_GTXTHRCFG, 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); |
| |
| err0a: |
| dwc3_ulpi_exit(dwc); |
| |
| 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); |
| phy_set_mode(dwc->usb2_generic_phy, PHY_MODE_USB_DEVICE); |
| phy_set_mode(dwc->usb3_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); |
| phy_set_mode(dwc->usb2_generic_phy, PHY_MODE_USB_HOST); |
| phy_set_mode(dwc->usb3_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; |
| } |
| phy_calibrate(dwc->usb2_generic_phy); |
| 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; |
| } |
| |
| /* de-assert DRVVBUS for HOST and OTG mode */ |
| dwc3_set_prtcap(dwc, DWC3_GCTL_PRTCAP_DEVICE); |
| } |
| |
| static void dwc3_get_properties(struct dwc3 *dwc) |
| { |
| struct device *dev = dwc->dev; |
| u8 lpm_nyet_threshold; |
| u8 tx_de_emphasis; |
| u8 hird_threshold; |
| u8 rx_thr_num_pkt_prd; |
| u8 rx_max_burst_prd; |
| u8 tx_thr_num_pkt_prd; |
| u8 tx_max_burst_prd; |
| |
| /* default to highest possible threshold */ |
| lpm_nyet_threshold = 0xf; |
| |
| /* 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"); |
| device_property_read_u8(dev, "snps,rx-thr-num-pkt-prd", |
| &rx_thr_num_pkt_prd); |
| device_property_read_u8(dev, "snps,rx-max-burst-prd", |
| &rx_max_burst_prd); |
| device_property_read_u8(dev, "snps,tx-thr-num-pkt-prd", |
| &tx_thr_num_pkt_prd); |
| device_property_read_u8(dev, "snps,tx-max-burst-prd", |
| &tx_max_burst_prd); |
| |
| 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->parkmode_disable_ss_quirk = device_property_read_bool(dev, |
| "snps,parkmode-disable-ss-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->dis_metastability_quirk = device_property_read_bool(dev, |
| "snps,dis_metastability_quirk"); |
| |
| 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->rx_thr_num_pkt_prd = rx_thr_num_pkt_prd; |
| dwc->rx_max_burst_prd = rx_max_burst_prd; |
| |
| dwc->tx_thr_num_pkt_prd = tx_thr_num_pkt_prd; |
| dwc->tx_max_burst_prd = tx_max_burst_prd; |
| |
| 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, dwc_res; |
| struct dwc3 *dwc; |
| |
| int ret; |
| |
| void __iomem *regs; |
| |
| dwc = devm_kzalloc(dev, sizeof(*dwc), GFP_KERNEL); |
| if (!dwc) |
| return -ENOMEM; |
| |
| dwc->clks = devm_kmemdup(dev, dwc3_core_clks, sizeof(dwc3_core_clks), |
| GFP_KERNEL); |
| if (!dwc->clks) |
| 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; |
| |
| /* |
| * Request memory region but exclude xHCI regs, |
| * since it will be requested by the xhci-plat driver. |
| */ |
| dwc_res = *res; |
| dwc_res.start += DWC3_GLOBALS_REGS_START; |
| |
| regs = devm_ioremap_resource(dev, &dwc_res); |
| if (IS_ERR(regs)) |
| return PTR_ERR(regs); |
| |
| dwc->regs = regs; |
| dwc->regs_size = resource_size(&dwc_res); |
| |
| dwc3_get_properties(dwc); |
| |
| dwc->reset = devm_reset_control_get_optional_shared(dev, NULL); |
| if (IS_ERR(dwc->reset)) |
| return PTR_ERR(dwc->reset); |
| |
| if (dev->of_node) { |
| dwc->num_clks = ARRAY_SIZE(dwc3_core_clks); |
| |
| ret = clk_bulk_get(dev, dwc->num_clks, dwc->clks); |
| if (ret == -EPROBE_DEFER) |
| return ret; |
| /* |
| * Clocks are optional, but new DT platforms should support all |
| * clocks as required by the DT-binding. |
| */ |
| if (ret) |
| dwc->num_clks = 0; |
| } |
| |
| ret = reset_control_deassert(dwc->reset); |
| if (ret) |
| goto put_clks; |
| |
| ret = clk_bulk_prepare(dwc->num_clks, dwc->clks); |
| if (ret) |
| goto assert_reset; |
| |
| ret = clk_bulk_enable(dwc->num_clks, dwc->clks); |
| if (ret) |
| goto unprepare_clks; |
| |
| 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) { |
| if (ret != -EPROBE_DEFER) |
| dev_err(dev, "failed to initialize core: %d\n", ret); |
| goto err4; |
| } |
| |
| dwc3_check_params(dwc); |
| dwc3_debugfs_init(dwc); |
| |
| ret = dwc3_core_init_mode(dwc); |
| if (ret) |
| goto err5; |
| |
| pm_runtime_put(dev); |
| |
| return 0; |
| |
| err5: |
| dwc3_debugfs_exit(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); |
| |
| dwc3_ulpi_exit(dwc); |
| |
| err4: |
| dwc3_free_scratch_buffers(dwc); |
| |
| err3: |
| dwc3_free_event_buffers(dwc); |
| |
| err2: |
| pm_runtime_allow(&pdev->dev); |
| |
| err1: |
| pm_runtime_put_sync(&pdev->dev); |
| pm_runtime_disable(&pdev->dev); |
| |
| clk_bulk_disable(dwc->num_clks, dwc->clks); |
| unprepare_clks: |
| clk_bulk_unprepare(dwc->num_clks, dwc->clks); |
| assert_reset: |
| reset_control_assert(dwc->reset); |
| put_clks: |
| clk_bulk_put(dwc->num_clks, dwc->clks); |
| |
| return ret; |
| } |
| |
| static int dwc3_remove(struct platform_device *pdev) |
| { |
| struct dwc3 *dwc = platform_get_drvdata(pdev); |
| |
| pm_runtime_get_sync(&pdev->dev); |
| |
| dwc3_core_exit_mode(dwc); |
| dwc3_debugfs_exit(dwc); |
| |
| dwc3_core_exit(dwc); |
| dwc3_ulpi_exit(dwc); |
| |
| pm_runtime_disable(&pdev->dev); |
| pm_runtime_put_noidle(&pdev->dev); |
| pm_runtime_set_suspended(&pdev->dev); |
| |
| dwc3_free_event_buffers(dwc); |
| dwc3_free_scratch_buffers(dwc); |
| clk_bulk_put(dwc->num_clks, dwc->clks); |
| |
| return 0; |
| } |
| |
| #ifdef CONFIG_PM |
| static int dwc3_core_init_for_resume(struct dwc3 *dwc) |
| { |
| int ret; |
| |
| ret = reset_control_deassert(dwc->reset); |
| if (ret) |
| return ret; |
| |
| ret = clk_bulk_prepare(dwc->num_clks, dwc->clks); |
| if (ret) |
| goto assert_reset; |
| |
| ret = clk_bulk_enable(dwc->num_clks, dwc->clks); |
| if (ret) |
| goto unprepare_clks; |
| |
| ret = dwc3_core_init(dwc); |
| if (ret) |
| goto disable_clks; |
| |
| return 0; |
| |
| disable_clks: |
| clk_bulk_disable(dwc->num_clks, dwc->clks); |
| unprepare_clks: |
| clk_bulk_unprepare(dwc->num_clks, dwc->clks); |
| assert_reset: |
| reset_control_assert(dwc->reset); |
| |
| return ret; |
| } |
| |
| static int dwc3_suspend_common(struct dwc3 *dwc, pm_message_t msg) |
| { |
| unsigned long flags; |
| u32 reg; |
| |
| switch (dwc->current_dr_role) { |
| case DWC3_GCTL_PRTCAP_DEVICE: |
| spin_lock_irqsave(&dwc->lock, flags); |
| dwc3_gadget_suspend(dwc); |
| spin_unlock_irqrestore(&dwc->lock, flags); |
| synchronize_irq(dwc->irq_gadget); |
| dwc3_core_exit(dwc); |
| break; |
| case DWC3_GCTL_PRTCAP_HOST: |
| if (!PMSG_IS_AUTO(msg)) { |
| dwc3_core_exit(dwc); |
| break; |
| } |
| |
| /* Let controller to suspend HSPHY before PHY driver suspends */ |
| if (dwc->dis_u2_susphy_quirk || |
| dwc->dis_enblslpm_quirk) { |
| reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0)); |
| reg |= DWC3_GUSB2PHYCFG_ENBLSLPM | |
| DWC3_GUSB2PHYCFG_SUSPHY; |
| dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg); |
| |
| /* Give some time for USB2 PHY to suspend */ |
| usleep_range(5000, 6000); |
| } |
| |
| phy_pm_runtime_put_sync(dwc->usb2_generic_phy); |
| phy_pm_runtime_put_sync(dwc->usb3_generic_phy); |
| break; |
| case DWC3_GCTL_PRTCAP_OTG: |
| /* do nothing during runtime_suspend */ |
| if (PMSG_IS_AUTO(msg)) |
| break; |
| |
| if (dwc->current_otg_role == DWC3_OTG_ROLE_DEVICE) { |
| spin_lock_irqsave(&dwc->lock, flags); |
| dwc3_gadget_suspend(dwc); |
| spin_unlock_irqrestore(&dwc->lock, flags); |
| synchronize_irq(dwc->irq_gadget); |
| } |
| |
| dwc3_otg_exit(dwc); |
| dwc3_core_exit(dwc); |
| break; |
| default: |
| /* do nothing */ |
| break; |
| } |
| |
| return 0; |
| } |
| |
| static int dwc3_resume_common(struct dwc3 *dwc, pm_message_t msg) |
| { |
| unsigned long flags; |
| int ret; |
| u32 reg; |
| |
| switch (dwc->current_dr_role) { |
| case DWC3_GCTL_PRTCAP_DEVICE: |
| ret = dwc3_core_init_for_resume(dwc); |
| if (ret) |
| return ret; |
| |
| dwc3_set_prtcap(dwc, DWC3_GCTL_PRTCAP_DEVICE); |
| spin_lock_irqsave(&dwc->lock, flags); |
| dwc3_gadget_resume(dwc); |
| spin_unlock_irqrestore(&dwc->lock, flags); |
| break; |
| case DWC3_GCTL_PRTCAP_HOST: |
| if (!PMSG_IS_AUTO(msg)) { |
| ret = dwc3_core_init_for_resume(dwc); |
| if (ret) |
| return ret; |
| dwc3_set_prtcap(dwc, DWC3_GCTL_PRTCAP_HOST); |
| break; |
| } |
| /* Restore GUSB2PHYCFG bits that were modified in suspend */ |
| reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0)); |
| 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); |
| |
| phy_pm_runtime_get_sync(dwc->usb2_generic_phy); |
| phy_pm_runtime_get_sync(dwc->usb3_generic_phy); |
| break; |
| case DWC3_GCTL_PRTCAP_OTG: |
| /* nothing to do on runtime_resume */ |
| if (PMSG_IS_AUTO(msg)) |
| break; |
| |
| ret = dwc3_core_init_for_resume(dwc); |
| if (ret) |
| return ret; |
| |
| dwc3_set_prtcap(dwc, dwc->current_dr_role); |
| |
| dwc3_otg_init(dwc); |
| if (dwc->current_otg_role == DWC3_OTG_ROLE_HOST) { |
| dwc3_otg_host_init(dwc); |
| } else if (dwc->current_otg_role == DWC3_OTG_ROLE_DEVICE) { |
| spin_lock_irqsave(&dwc->lock, flags); |
| dwc3_gadget_resume(dwc); |
| spin_unlock_irqrestore(&dwc->lock, flags); |
| } |
| |
| break; |
| default: |
| /* do nothing */ |
| break; |
| } |
| |
| return 0; |
| } |
| |
| static int dwc3_runtime_checks(struct dwc3 *dwc) |
| { |
| switch (dwc->current_dr_role) { |
| case DWC3_GCTL_PRTCAP_DEVICE: |
| if (dwc->connected) |
| return -EBUSY; |
| break; |
| case DWC3_GCTL_PRTCAP_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, PMSG_AUTO_SUSPEND); |
| 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, PMSG_AUTO_RESUME); |
| if (ret) |
| return ret; |
| |
| switch (dwc->current_dr_role) { |
| case DWC3_GCTL_PRTCAP_DEVICE: |
| dwc3_gadget_process_pending_events(dwc); |
| break; |
| case DWC3_GCTL_PRTCAP_HOST: |
| default: |
| /* do nothing */ |
| break; |
| } |
| |
| pm_runtime_mark_last_busy(dev); |
| |
| return 0; |
| } |
| |
| static int dwc3_runtime_idle(struct device *dev) |
| { |
| struct dwc3 *dwc = dev_get_drvdata(dev); |
| |
| switch (dwc->current_dr_role) { |
| case DWC3_GCTL_PRTCAP_DEVICE: |
| if (dwc3_runtime_checks(dwc)) |
| return -EBUSY; |
| break; |
| case DWC3_GCTL_PRTCAP_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, PMSG_SUSPEND); |
| 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, PMSG_RESUME); |
| 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"); |