// SPDX-License-Identifier: GPL-2.0 /** * core.c - DesignWare USB3 DRD Controller Core file * * Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com * * Authors: Felipe Balbi , * Sebastian Andrzej Siewior * * Taken from Linux Kernel v3.19-rc1 (drivers/usb/dwc3/core.c) and ported * to uboot. * * commit cd72f890d2 : usb: dwc3: core: enable phy suspend quirk on non-FPGA */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "core.h" #include "gadget.h" #include "io.h" #include "linux-compat.h" #define NSEC_PER_SEC 1000000000L static LIST_HEAD(dwc3_list); /* -------------------------------------------------------------------------- */ static 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_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; /* Before Resetting PHY, put Core in Reset */ reg = dwc3_readl(dwc->regs, DWC3_GCTL); reg |= DWC3_GCTL_CORESOFTRESET; dwc3_writel(dwc->regs, DWC3_GCTL, reg); /* Assert USB3 PHY reset */ reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0)); reg |= DWC3_GUSB3PIPECTL_PHYSOFTRST; dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg); /* Assert USB2 PHY reset */ reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0)); reg |= DWC3_GUSB2PHYCFG_PHYSOFTRST; dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg); mdelay(100); /* Clear USB3 PHY reset */ reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0)); reg &= ~DWC3_GUSB3PIPECTL_PHYSOFTRST; dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg); /* Clear USB2 PHY reset */ reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0)); reg &= ~DWC3_GUSB2PHYCFG_PHYSOFTRST; dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg); mdelay(100); /* After PHYs are stable we can take Core out of reset state */ reg = dwc3_readl(dwc->regs, DWC3_GCTL); reg &= ~DWC3_GCTL_CORESOFTRESET; dwc3_writel(dwc->regs, DWC3_GCTL, reg); return 0; } /* * 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; if (dwc->revision < DWC3_REVISION_250A) return; if (fladj == 0) return; reg = dwc3_readl(dwc->regs, DWC3_GFLADJ); reg &= ~DWC3_GFLADJ_30MHZ_MASK; reg |= DWC3_GFLADJ_30MHZ_SDBND_SEL | fladj; dwc3_writel(dwc->regs, DWC3_GFLADJ, reg); } /** * dwc3_ref_clk_period - Reference clock period configuration * Default reference clock period depends on hardware * configuration. For systems with reference clock that differs * from the default, this will set clock period in DWC3_GUCTL * register. * @dwc: Pointer to our controller context structure * @ref_clk_per: reference clock period in ns */ static void dwc3_ref_clk_period(struct dwc3 *dwc) { unsigned long period; unsigned long fladj; unsigned long decr; unsigned long rate; u32 reg; if (dwc->ref_clk) { rate = clk_get_rate(dwc->ref_clk); if (!rate) return; period = NSEC_PER_SEC / rate; } else { return; } reg = dwc3_readl(dwc->regs, DWC3_GUCTL); reg &= ~DWC3_GUCTL_REFCLKPER_MASK; reg |= FIELD_PREP(DWC3_GUCTL_REFCLKPER_MASK, period); dwc3_writel(dwc->regs, DWC3_GUCTL, reg); if (dwc->revision <= DWC3_REVISION_250A) return; /* * The calculation below is * * 125000 * (NSEC_PER_SEC / (rate * period) - 1) * * but rearranged for fixed-point arithmetic. The division must be * 64-bit because 125000 * NSEC_PER_SEC doesn't fit in 32 bits (and * neither does rate * period). * * Note that rate * period ~= NSEC_PER_SECOND, minus the number of * nanoseconds of error caused by the truncation which happened during * the division when calculating rate or period (whichever one was * derived from the other). We first calculate the relative error, then * scale it to units of 8 ppm. */ fladj = div64_u64(125000ULL * NSEC_PER_SEC, (u64)rate * period); fladj -= 125000; /* * The documented 240MHz constant is scaled by 2 to get PLS1 as well. */ decr = 480000000 / rate; reg = dwc3_readl(dwc->regs, DWC3_GFLADJ); reg &= ~DWC3_GFLADJ_REFCLK_FLADJ_MASK & ~DWC3_GFLADJ_240MHZDECR & ~DWC3_GFLADJ_240MHZDECR_PLS1; reg |= FIELD_PREP(DWC3_GFLADJ_REFCLK_FLADJ_MASK, fladj) | FIELD_PREP(DWC3_GFLADJ_240MHZDECR, decr >> 1) | FIELD_PREP(DWC3_GFLADJ_240MHZDECR_PLS1, decr & 1); 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(evt->buf); } /** * 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((struct udevice *)dwc->dev, sizeof(*evt), GFP_KERNEL); if (!evt) return ERR_PTR(-ENOMEM); evt->dwc = dwc; evt->length = length; evt->buf = dma_alloc_coherent(length, (unsigned long *)&evt->dma); if (!evt->buf) return ERR_PTR(-ENOMEM); dwc3_flush_cache((uintptr_t)evt->buf, evt->length); 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 length) { int num; int i; num = DWC3_NUM_INT(dwc->hwparams.hwparams1); dwc->num_event_buffers = num; dwc->ev_buffs = memalign(CONFIG_SYS_CACHELINE_SIZE, sizeof(*dwc->ev_buffs) * num); 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; scratch_addr = dma_map_single(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(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; dma_unmap_single(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; dev_vdbg(dwc->dev, "found %d IN and %d OUT endpoints\n", 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); } static void dwc3_hsphy_mode_setup(struct dwc3 *dwc) { enum usb_phy_interface hsphy_mode = dwc->hsphy_mode; u32 reg; /* Set dwc3 usb2 phy config */ reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0)); switch (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; } dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg); } /** * dwc3_phy_setup - Configure USB PHY Interface of DWC3 Core * @dwc: Pointer to our controller context structure */ static void dwc3_phy_setup(struct dwc3 *dwc) { u32 reg; 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; if (dwc->dis_del_phy_power_chg_quirk) reg &= ~DWC3_GUSB3PIPECTL_DEPOCHANGE; dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg); dwc3_hsphy_mode_setup(dwc); mdelay(100); reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0)); /* * 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); mdelay(100); } /* set global incr burst type configuration registers */ static void dwc3_set_incr_burst_type(struct dwc3 *dwc) { struct udevice *dev = dwc->dev; u32 cfg; if (!dwc->incrx_size) return; cfg = dwc3_readl(dwc->regs, DWC3_GSBUSCFG0); /* Enable Undefined Length INCR Burst and Enable INCRx Burst */ cfg &= ~DWC3_GSBUSCFG0_INCRBRST_MASK; if (dwc->incrx_mode) cfg |= DWC3_GSBUSCFG0_INCRBRSTENA; switch (dwc->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) { unsigned long timeout; 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) { dev_err(dwc->dev, "this is not a DesignWare USB3 DRD Core\n"); ret = -ENODEV; goto err0; } dwc->revision = reg; /* 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; } /* issue device SoftReset too */ timeout = 5000; dwc3_writel(dwc->regs, DWC3_DCTL, DWC3_DCTL_CSFTRST); while (timeout--) { reg = dwc3_readl(dwc->regs, DWC3_DCTL); if (!(reg & DWC3_DCTL_CSFTRST)) break; }; if (!timeout) { dev_err(dwc->dev, "Reset Timed Out\n"); ret = -ETIMEDOUT; goto err0; } dwc3_phy_setup(dwc); ret = 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; } if(dwc->disable_scramble_quirk && !dwc->is_fpga) WARN(true, "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 err0; ret = dwc3_setup_scratch_buffers(dwc); if (ret) goto err1; /* Adjust Frame Length */ dwc3_frame_length_adjustment(dwc, dwc->fladj); /* Adjust Reference Clock Period */ dwc3_ref_clk_period(dwc); dwc3_set_incr_burst_type(dwc); return 0; err1: dwc3_free_scratch_buffers(dwc); err0: return ret; } static void dwc3_core_exit(struct dwc3 *dwc) { dwc3_free_scratch_buffers(dwc); } static int dwc3_core_init_mode(struct dwc3 *dwc) { 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(dwc->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(dwc->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(dwc->dev, "failed to initialize host\n"); return ret; } ret = dwc3_gadget_init(dwc); if (ret) { dev_err(dwc->dev, "failed to initialize gadget\n"); return ret; } break; default: dev_err(dwc->dev, "Unsupported mode of operation %d\n", dwc->dr_mode); return -EINVAL; } return 0; } static void dwc3_gadget_run(struct dwc3 *dwc) { dwc3_writel(dwc->regs, DWC3_DCTL, DWC3_DCTL_RUN_STOP); mdelay(100); } static void dwc3_core_stop(struct dwc3 *dwc) { u32 reg; reg = dwc3_readl(dwc->regs, DWC3_DCTL); dwc3_writel(dwc->regs, DWC3_DCTL, reg & ~(DWC3_DCTL_RUN_STOP)); } 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; } /* * switch back to peripheral mode * This enables the phy to enter idle and then, if enabled, suspend. */ dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_DEVICE); dwc3_gadget_run(dwc); } #define DWC3_ALIGN_MASK (16 - 1) /** * dwc3_uboot_init - dwc3 core uboot initialization code * @dwc3_dev: struct dwc3_device containing initialization data * * Entry point for dwc3 driver (equivalent to dwc3_probe in linux * kernel driver). Pointer to dwc3_device should be passed containing * base address and other initialization data. Returns '0' on success and * a negative value on failure. * * Generally called from board_usb_init() implemented in board file. */ int dwc3_uboot_init(struct dwc3_device *dwc3_dev) { struct dwc3 *dwc; struct device *dev = NULL; u8 lpm_nyet_threshold; u8 tx_de_emphasis; u8 hird_threshold; int ret; void *mem; mem = devm_kzalloc((struct udevice *)dev, sizeof(*dwc) + DWC3_ALIGN_MASK, GFP_KERNEL); if (!mem) return -ENOMEM; dwc = PTR_ALIGN(mem, DWC3_ALIGN_MASK + 1); dwc->mem = mem; dwc->regs = (void *)(uintptr_t)(dwc3_dev->base + DWC3_GLOBALS_REGS_START); /* 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 = dwc3_dev->maximum_speed; dwc->has_lpm_erratum = dwc3_dev->has_lpm_erratum; if (dwc3_dev->lpm_nyet_threshold) lpm_nyet_threshold = dwc3_dev->lpm_nyet_threshold; dwc->is_utmi_l1_suspend = dwc3_dev->is_utmi_l1_suspend; if (dwc3_dev->hird_threshold) hird_threshold = dwc3_dev->hird_threshold; dwc->needs_fifo_resize = dwc3_dev->tx_fifo_resize; dwc->dr_mode = dwc3_dev->dr_mode; dwc->disable_scramble_quirk = dwc3_dev->disable_scramble_quirk; dwc->u2exit_lfps_quirk = dwc3_dev->u2exit_lfps_quirk; dwc->u2ss_inp3_quirk = dwc3_dev->u2ss_inp3_quirk; dwc->req_p1p2p3_quirk = dwc3_dev->req_p1p2p3_quirk; dwc->del_p1p2p3_quirk = dwc3_dev->del_p1p2p3_quirk; dwc->del_phy_power_chg_quirk = dwc3_dev->del_phy_power_chg_quirk; dwc->lfps_filter_quirk = dwc3_dev->lfps_filter_quirk; dwc->rx_detect_poll_quirk = dwc3_dev->rx_detect_poll_quirk; dwc->dis_u3_susphy_quirk = dwc3_dev->dis_u3_susphy_quirk; dwc->dis_u2_susphy_quirk = dwc3_dev->dis_u2_susphy_quirk; dwc->dis_del_phy_power_chg_quirk = dwc3_dev->dis_del_phy_power_chg_quirk; dwc->dis_tx_ipgap_linecheck_quirk = dwc3_dev->dis_tx_ipgap_linecheck_quirk; dwc->dis_enblslpm_quirk = dwc3_dev->dis_enblslpm_quirk; dwc->dis_u2_freeclk_exists_quirk = dwc3_dev->dis_u2_freeclk_exists_quirk; dwc->tx_de_emphasis_quirk = dwc3_dev->tx_de_emphasis_quirk; if (dwc3_dev->tx_de_emphasis) tx_de_emphasis = dwc3_dev->tx_de_emphasis; /* 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); dwc->hsphy_mode = dwc3_dev->hsphy_mode; dwc->index = dwc3_dev->index; 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"); return -ENOMEM; } if (!IS_ENABLED(CONFIG_USB_DWC3_GADGET)) dwc->dr_mode = USB_DR_MODE_HOST; else if (!IS_ENABLED(CONFIG_USB_HOST)) 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(dwc->dev, "failed to initialize core\n"); goto err0; } ret = dwc3_event_buffers_setup(dwc); if (ret) { dev_err(dwc->dev, "failed to setup event buffers\n"); goto err1; } ret = dwc3_core_init_mode(dwc); if (ret) goto err2; list_add_tail(&dwc->list, &dwc3_list); return 0; err2: dwc3_event_buffers_cleanup(dwc); err1: dwc3_core_exit(dwc); err0: dwc3_free_event_buffers(dwc); return ret; } /** * dwc3_uboot_exit - dwc3 core uboot cleanup code * @index: index of this controller * * Performs cleanup of memory allocated in dwc3_uboot_init and other misc * cleanups (equivalent to dwc3_remove in linux). index of _this_ controller * should be passed and should match with the index passed in * dwc3_device during init. * * Generally called from board file. */ void dwc3_uboot_exit(int index) { struct dwc3 *dwc; list_for_each_entry(dwc, &dwc3_list, list) { if (dwc->index != index) continue; dwc3_core_exit_mode(dwc); dwc3_event_buffers_cleanup(dwc); dwc3_free_event_buffers(dwc); dwc3_core_exit(dwc); list_del(&dwc->list); kfree(dwc->mem); break; } } /** * dwc3_uboot_handle_interrupt - handle dwc3 core interrupt * @index: index of this controller * * Invokes dwc3 gadget interrupts. * * Generally called from board file. */ void dwc3_uboot_handle_interrupt(int index) { struct dwc3 *dwc = NULL; list_for_each_entry(dwc, &dwc3_list, list) { if (dwc->index != index) continue; dwc3_gadget_uboot_handle_interrupt(dwc); break; } } MODULE_ALIAS("platform:dwc3"); MODULE_AUTHOR("Felipe Balbi "); MODULE_LICENSE("GPL v2"); MODULE_DESCRIPTION("DesignWare USB3 DRD Controller Driver"); #if CONFIG_IS_ENABLED(PHY) && CONFIG_IS_ENABLED(DM_USB) int dwc3_setup_phy(struct udevice *dev, struct phy_bulk *phys) { int ret; ret = generic_phy_get_bulk(dev, phys); if (ret) return ret; ret = generic_phy_init_bulk(phys); if (ret) return ret; ret = generic_phy_power_on_bulk(phys); if (ret) generic_phy_exit_bulk(phys); return ret; } int dwc3_shutdown_phy(struct udevice *dev, struct phy_bulk *phys) { int ret; ret = generic_phy_power_off_bulk(phys); ret |= generic_phy_exit_bulk(phys); return ret; } #endif #if CONFIG_IS_ENABLED(DM_USB) void dwc3_of_parse(struct dwc3 *dwc) { const u8 *tmp; struct udevice *dev = dwc->dev; u8 lpm_nyet_threshold; u8 tx_de_emphasis; u8 hird_threshold; u32 val; int i; /* 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->hsphy_mode = usb_get_phy_mode(dev_ofnode(dev)); dwc->has_lpm_erratum = dev_read_bool(dev, "snps,has-lpm-erratum"); tmp = dev_read_u8_array_ptr(dev, "snps,lpm-nyet-threshold", 1); if (tmp) lpm_nyet_threshold = *tmp; dwc->is_utmi_l1_suspend = dev_read_bool(dev, "snps,is-utmi-l1-suspend"); tmp = dev_read_u8_array_ptr(dev, "snps,hird-threshold", 1); if (tmp) hird_threshold = *tmp; dwc->disable_scramble_quirk = dev_read_bool(dev, "snps,disable_scramble_quirk"); dwc->u2exit_lfps_quirk = dev_read_bool(dev, "snps,u2exit_lfps_quirk"); dwc->u2ss_inp3_quirk = dev_read_bool(dev, "snps,u2ss_inp3_quirk"); dwc->req_p1p2p3_quirk = dev_read_bool(dev, "snps,req_p1p2p3_quirk"); dwc->del_p1p2p3_quirk = dev_read_bool(dev, "snps,del_p1p2p3_quirk"); dwc->del_phy_power_chg_quirk = dev_read_bool(dev, "snps,del_phy_power_chg_quirk"); dwc->lfps_filter_quirk = dev_read_bool(dev, "snps,lfps_filter_quirk"); dwc->rx_detect_poll_quirk = dev_read_bool(dev, "snps,rx_detect_poll_quirk"); dwc->dis_u3_susphy_quirk = dev_read_bool(dev, "snps,dis_u3_susphy_quirk"); dwc->dis_u2_susphy_quirk = dev_read_bool(dev, "snps,dis_u2_susphy_quirk"); dwc->dis_del_phy_power_chg_quirk = dev_read_bool(dev, "snps,dis-del-phy-power-chg-quirk"); dwc->dis_tx_ipgap_linecheck_quirk = dev_read_bool(dev, "snps,dis-tx-ipgap-linecheck-quirk"); dwc->dis_enblslpm_quirk = dev_read_bool(dev, "snps,dis_enblslpm_quirk"); dwc->dis_u2_freeclk_exists_quirk = dev_read_bool(dev, "snps,dis-u2-freeclk-exists-quirk"); dwc->tx_de_emphasis_quirk = dev_read_bool(dev, "snps,tx_de_emphasis_quirk"); tmp = dev_read_u8_array_ptr(dev, "snps,tx_de_emphasis", 1); if (tmp) tx_de_emphasis = *tmp; 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); dev_read_u32(dev, "snps,quirk-frame-length-adjustment", &dwc->fladj); /* * 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. */ dwc->incrx_mode = INCRX_BURST_MODE; dwc->incrx_size = 0; for (i = 0; i < 8; i++) { if (dev_read_u32_index(dev, "snps,incr-burst-type-adjustment", i, &val)) break; dwc->incrx_mode = INCRX_UNDEF_LENGTH_BURST_MODE; dwc->incrx_size = max(dwc->incrx_size, val); } } int dwc3_init(struct dwc3 *dwc) { int ret; u32 reg; 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"); return -ENOMEM; } ret = dwc3_core_init(dwc); if (ret) { dev_err(dwc->dev, "failed to initialize core\n"); goto core_fail; } ret = dwc3_event_buffers_setup(dwc); if (ret) { dev_err(dwc->dev, "failed to setup event buffers\n"); goto event_fail; } if (dwc->revision >= DWC3_REVISION_250A) { reg = dwc3_readl(dwc->regs, DWC3_GUCTL1); /* * Enable hardware control of sending remote wakeup * in HS when the device is in the L1 state. */ if (dwc->revision >= DWC3_REVISION_290A) reg |= DWC3_GUCTL1_DEV_L1_EXIT_BY_HW; if (dwc->dis_tx_ipgap_linecheck_quirk) reg |= DWC3_GUCTL1_TX_IPGAP_LINECHECK_DIS; dwc3_writel(dwc->regs, DWC3_GUCTL1, reg); } if (dwc->dr_mode == USB_DR_MODE_HOST || dwc->dr_mode == USB_DR_MODE_OTG) { reg = dwc3_readl(dwc->regs, DWC3_GUCTL); reg |= DWC3_GUCTL_HSTINAUTORETRY; dwc3_writel(dwc->regs, DWC3_GUCTL, reg); } ret = dwc3_core_init_mode(dwc); if (ret) goto mode_fail; return 0; mode_fail: dwc3_event_buffers_cleanup(dwc); event_fail: dwc3_core_exit(dwc); core_fail: dwc3_free_event_buffers(dwc); return ret; } void dwc3_remove(struct dwc3 *dwc) { dwc3_core_exit_mode(dwc); dwc3_event_buffers_cleanup(dwc); dwc3_free_event_buffers(dwc); dwc3_core_stop(dwc); dwc3_core_exit(dwc); kfree(dwc->mem); } #endif