/* * core.c - DesignWare HS OTG Controller common routines * * Copyright (C) 2004-2013 Synopsys, Inc. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions, and the following disclaimer, * without modification. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. The names of the above-listed copyright holders may not be used * to endorse or promote products derived from this software without * specific prior written permission. * * ALTERNATIVELY, this software may be distributed under the terms of the * GNU General Public License ("GPL") as published by the Free Software * Foundation; either version 2 of the License, or (at your option) any * later version. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /* * The Core code provides basic services for accessing and managing the * DWC_otg hardware. These services are used by both the Host Controller * Driver and the Peripheral Controller Driver. */ #include #include #include #include #include #include #include #include #include #include #include #include #include "core.h" #include "hcd.h" #if IS_ENABLED(CONFIG_USB_DWC2_HOST) || IS_ENABLED(CONFIG_USB_DWC2_DUAL_ROLE) /** * dwc2_backup_host_registers() - Backup controller host registers. * When suspending usb bus, registers needs to be backuped * if controller power is disabled once suspended. * * @hsotg: Programming view of the DWC_otg controller */ static int dwc2_backup_host_registers(struct dwc2_hsotg *hsotg) { struct dwc2_hregs_backup *hr; int i; dev_dbg(hsotg->dev, "%s\n", __func__); /* Backup Host regs */ hr = hsotg->hr_backup; if (!hr) { hr = devm_kzalloc(hsotg->dev, sizeof(*hr), GFP_KERNEL); if (!hr) { dev_err(hsotg->dev, "%s: can't allocate host regs\n", __func__); return -ENOMEM; } hsotg->hr_backup = hr; } hr->hcfg = readl(hsotg->regs + HCFG); hr->haintmsk = readl(hsotg->regs + HAINTMSK); for (i = 0; i < hsotg->core_params->host_channels; ++i) hr->hcintmsk[i] = readl(hsotg->regs + HCINTMSK(i)); hr->hprt0 = readl(hsotg->regs + HPRT0); hr->hfir = readl(hsotg->regs + HFIR); return 0; } /** * dwc2_restore_host_registers() - Restore controller host registers. * When resuming usb bus, device registers needs to be restored * if controller power were disabled. * * @hsotg: Programming view of the DWC_otg controller */ static int dwc2_restore_host_registers(struct dwc2_hsotg *hsotg) { struct dwc2_hregs_backup *hr; int i; dev_dbg(hsotg->dev, "%s\n", __func__); /* Restore host regs */ hr = hsotg->hr_backup; if (!hr) { dev_err(hsotg->dev, "%s: no host registers to restore\n", __func__); return -EINVAL; } writel(hr->hcfg, hsotg->regs + HCFG); writel(hr->haintmsk, hsotg->regs + HAINTMSK); for (i = 0; i < hsotg->core_params->host_channels; ++i) writel(hr->hcintmsk[i], hsotg->regs + HCINTMSK(i)); writel(hr->hprt0, hsotg->regs + HPRT0); writel(hr->hfir, hsotg->regs + HFIR); return 0; } #else static inline int dwc2_backup_host_registers(struct dwc2_hsotg *hsotg) { return 0; } static inline int dwc2_restore_host_registers(struct dwc2_hsotg *hsotg) { return 0; } #endif #if IS_ENABLED(CONFIG_USB_DWC2_PERIPHERAL) || \ IS_ENABLED(CONFIG_USB_DWC2_DUAL_ROLE) /** * dwc2_backup_device_registers() - Backup controller device registers. * When suspending usb bus, registers needs to be backuped * if controller power is disabled once suspended. * * @hsotg: Programming view of the DWC_otg controller */ static int dwc2_backup_device_registers(struct dwc2_hsotg *hsotg) { struct dwc2_dregs_backup *dr; int i; dev_dbg(hsotg->dev, "%s\n", __func__); /* Backup dev regs */ dr = hsotg->dr_backup; if (!dr) { dr = devm_kzalloc(hsotg->dev, sizeof(*dr), GFP_KERNEL); if (!dr) { dev_err(hsotg->dev, "%s: can't allocate device regs\n", __func__); return -ENOMEM; } hsotg->dr_backup = dr; } dr->dcfg = readl(hsotg->regs + DCFG); dr->dctl = readl(hsotg->regs + DCTL); dr->daintmsk = readl(hsotg->regs + DAINTMSK); dr->diepmsk = readl(hsotg->regs + DIEPMSK); dr->doepmsk = readl(hsotg->regs + DOEPMSK); for (i = 0; i < hsotg->num_of_eps; i++) { /* Backup IN EPs */ dr->diepctl[i] = readl(hsotg->regs + DIEPCTL(i)); /* Ensure DATA PID is correctly configured */ if (dr->diepctl[i] & DXEPCTL_DPID) dr->diepctl[i] |= DXEPCTL_SETD1PID; else dr->diepctl[i] |= DXEPCTL_SETD0PID; dr->dieptsiz[i] = readl(hsotg->regs + DIEPTSIZ(i)); dr->diepdma[i] = readl(hsotg->regs + DIEPDMA(i)); /* Backup OUT EPs */ dr->doepctl[i] = readl(hsotg->regs + DOEPCTL(i)); /* Ensure DATA PID is correctly configured */ if (dr->doepctl[i] & DXEPCTL_DPID) dr->doepctl[i] |= DXEPCTL_SETD1PID; else dr->doepctl[i] |= DXEPCTL_SETD0PID; dr->doeptsiz[i] = readl(hsotg->regs + DOEPTSIZ(i)); dr->doepdma[i] = readl(hsotg->regs + DOEPDMA(i)); } return 0; } /** * dwc2_restore_device_registers() - Restore controller device registers. * When resuming usb bus, device registers needs to be restored * if controller power were disabled. * * @hsotg: Programming view of the DWC_otg controller */ static int dwc2_restore_device_registers(struct dwc2_hsotg *hsotg) { struct dwc2_dregs_backup *dr; u32 dctl; int i; dev_dbg(hsotg->dev, "%s\n", __func__); /* Restore dev regs */ dr = hsotg->dr_backup; if (!dr) { dev_err(hsotg->dev, "%s: no device registers to restore\n", __func__); return -EINVAL; } writel(dr->dcfg, hsotg->regs + DCFG); writel(dr->dctl, hsotg->regs + DCTL); writel(dr->daintmsk, hsotg->regs + DAINTMSK); writel(dr->diepmsk, hsotg->regs + DIEPMSK); writel(dr->doepmsk, hsotg->regs + DOEPMSK); for (i = 0; i < hsotg->num_of_eps; i++) { /* Restore IN EPs */ writel(dr->diepctl[i], hsotg->regs + DIEPCTL(i)); writel(dr->dieptsiz[i], hsotg->regs + DIEPTSIZ(i)); writel(dr->diepdma[i], hsotg->regs + DIEPDMA(i)); /* Restore OUT EPs */ writel(dr->doepctl[i], hsotg->regs + DOEPCTL(i)); writel(dr->doeptsiz[i], hsotg->regs + DOEPTSIZ(i)); writel(dr->doepdma[i], hsotg->regs + DOEPDMA(i)); } /* Set the Power-On Programming done bit */ dctl = readl(hsotg->regs + DCTL); dctl |= DCTL_PWRONPRGDONE; writel(dctl, hsotg->regs + DCTL); return 0; } #else static inline int dwc2_backup_device_registers(struct dwc2_hsotg *hsotg) { return 0; } static inline int dwc2_restore_device_registers(struct dwc2_hsotg *hsotg) { return 0; } #endif /** * dwc2_backup_global_registers() - Backup global controller registers. * When suspending usb bus, registers needs to be backuped * if controller power is disabled once suspended. * * @hsotg: Programming view of the DWC_otg controller */ static int dwc2_backup_global_registers(struct dwc2_hsotg *hsotg) { struct dwc2_gregs_backup *gr; int i; /* Backup global regs */ gr = hsotg->gr_backup; if (!gr) { gr = devm_kzalloc(hsotg->dev, sizeof(*gr), GFP_KERNEL); if (!gr) { dev_err(hsotg->dev, "%s: can't allocate global regs\n", __func__); return -ENOMEM; } hsotg->gr_backup = gr; } gr->gotgctl = readl(hsotg->regs + GOTGCTL); gr->gintmsk = readl(hsotg->regs + GINTMSK); gr->gahbcfg = readl(hsotg->regs + GAHBCFG); gr->gusbcfg = readl(hsotg->regs + GUSBCFG); gr->grxfsiz = readl(hsotg->regs + GRXFSIZ); gr->gnptxfsiz = readl(hsotg->regs + GNPTXFSIZ); gr->hptxfsiz = readl(hsotg->regs + HPTXFSIZ); gr->gdfifocfg = readl(hsotg->regs + GDFIFOCFG); for (i = 0; i < MAX_EPS_CHANNELS; i++) gr->dtxfsiz[i] = readl(hsotg->regs + DPTXFSIZN(i)); return 0; } /** * dwc2_restore_global_registers() - Restore controller global registers. * When resuming usb bus, device registers needs to be restored * if controller power were disabled. * * @hsotg: Programming view of the DWC_otg controller */ static int dwc2_restore_global_registers(struct dwc2_hsotg *hsotg) { struct dwc2_gregs_backup *gr; int i; dev_dbg(hsotg->dev, "%s\n", __func__); /* Restore global regs */ gr = hsotg->gr_backup; if (!gr) { dev_err(hsotg->dev, "%s: no global registers to restore\n", __func__); return -EINVAL; } writel(0xffffffff, hsotg->regs + GINTSTS); writel(gr->gotgctl, hsotg->regs + GOTGCTL); writel(gr->gintmsk, hsotg->regs + GINTMSK); writel(gr->gusbcfg, hsotg->regs + GUSBCFG); writel(gr->gahbcfg, hsotg->regs + GAHBCFG); writel(gr->grxfsiz, hsotg->regs + GRXFSIZ); writel(gr->gnptxfsiz, hsotg->regs + GNPTXFSIZ); writel(gr->hptxfsiz, hsotg->regs + HPTXFSIZ); writel(gr->gdfifocfg, hsotg->regs + GDFIFOCFG); for (i = 0; i < MAX_EPS_CHANNELS; i++) writel(gr->dtxfsiz[i], hsotg->regs + DPTXFSIZN(i)); return 0; } /** * dwc2_exit_hibernation() - Exit controller from Partial Power Down. * * @hsotg: Programming view of the DWC_otg controller * @restore: Controller registers need to be restored */ int dwc2_exit_hibernation(struct dwc2_hsotg *hsotg, bool restore) { u32 pcgcctl; int ret = 0; pcgcctl = readl(hsotg->regs + PCGCTL); pcgcctl &= ~PCGCTL_STOPPCLK; writel(pcgcctl, hsotg->regs + PCGCTL); pcgcctl = readl(hsotg->regs + PCGCTL); pcgcctl &= ~PCGCTL_PWRCLMP; writel(pcgcctl, hsotg->regs + PCGCTL); pcgcctl = readl(hsotg->regs + PCGCTL); pcgcctl &= ~PCGCTL_RSTPDWNMODULE; writel(pcgcctl, hsotg->regs + PCGCTL); udelay(100); if (restore) { ret = dwc2_restore_global_registers(hsotg); if (ret) { dev_err(hsotg->dev, "%s: failed to restore registers\n", __func__); return ret; } if (dwc2_is_host_mode(hsotg)) { ret = dwc2_restore_host_registers(hsotg); if (ret) { dev_err(hsotg->dev, "%s: failed to restore host registers\n", __func__); return ret; } } else { ret = dwc2_restore_device_registers(hsotg); if (ret) { dev_err(hsotg->dev, "%s: failed to restore device registers\n", __func__); return ret; } } } return ret; } /** * dwc2_enter_hibernation() - Put controller in Partial Power Down. * * @hsotg: Programming view of the DWC_otg controller */ int dwc2_enter_hibernation(struct dwc2_hsotg *hsotg) { u32 pcgcctl; int ret = 0; /* Backup all registers */ ret = dwc2_backup_global_registers(hsotg); if (ret) { dev_err(hsotg->dev, "%s: failed to backup global registers\n", __func__); return ret; } if (dwc2_is_host_mode(hsotg)) { ret = dwc2_backup_host_registers(hsotg); if (ret) { dev_err(hsotg->dev, "%s: failed to backup host registers\n", __func__); return ret; } } else { ret = dwc2_backup_device_registers(hsotg); if (ret) { dev_err(hsotg->dev, "%s: failed to backup device registers\n", __func__); return ret; } } /* Put the controller in low power state */ pcgcctl = readl(hsotg->regs + PCGCTL); pcgcctl |= PCGCTL_PWRCLMP; writel(pcgcctl, hsotg->regs + PCGCTL); ndelay(20); pcgcctl |= PCGCTL_RSTPDWNMODULE; writel(pcgcctl, hsotg->regs + PCGCTL); ndelay(20); pcgcctl |= PCGCTL_STOPPCLK; writel(pcgcctl, hsotg->regs + PCGCTL); return ret; } /** * dwc2_enable_common_interrupts() - Initializes the commmon interrupts, * used in both device and host modes * * @hsotg: Programming view of the DWC_otg controller */ static void dwc2_enable_common_interrupts(struct dwc2_hsotg *hsotg) { u32 intmsk; /* Clear any pending OTG Interrupts */ writel(0xffffffff, hsotg->regs + GOTGINT); /* Clear any pending interrupts */ writel(0xffffffff, hsotg->regs + GINTSTS); /* Enable the interrupts in the GINTMSK */ intmsk = GINTSTS_MODEMIS | GINTSTS_OTGINT; if (hsotg->core_params->dma_enable <= 0) intmsk |= GINTSTS_RXFLVL; if (hsotg->core_params->external_id_pin_ctl <= 0) intmsk |= GINTSTS_CONIDSTSCHNG; intmsk |= GINTSTS_WKUPINT | GINTSTS_USBSUSP | GINTSTS_SESSREQINT; writel(intmsk, hsotg->regs + GINTMSK); } /* * Initializes the FSLSPClkSel field of the HCFG register depending on the * PHY type */ static void dwc2_init_fs_ls_pclk_sel(struct dwc2_hsotg *hsotg) { u32 hcfg, val; if ((hsotg->hw_params.hs_phy_type == GHWCFG2_HS_PHY_TYPE_ULPI && hsotg->hw_params.fs_phy_type == GHWCFG2_FS_PHY_TYPE_DEDICATED && hsotg->core_params->ulpi_fs_ls > 0) || hsotg->core_params->phy_type == DWC2_PHY_TYPE_PARAM_FS) { /* Full speed PHY */ val = HCFG_FSLSPCLKSEL_48_MHZ; } else { /* High speed PHY running at full speed or high speed */ val = HCFG_FSLSPCLKSEL_30_60_MHZ; } dev_dbg(hsotg->dev, "Initializing HCFG.FSLSPClkSel to %08x\n", val); hcfg = readl(hsotg->regs + HCFG); hcfg &= ~HCFG_FSLSPCLKSEL_MASK; hcfg |= val << HCFG_FSLSPCLKSEL_SHIFT; writel(hcfg, hsotg->regs + HCFG); } /* * Do core a soft reset of the core. Be careful with this because it * resets all the internal state machines of the core. */ static int dwc2_core_reset(struct dwc2_hsotg *hsotg) { u32 greset; int count = 0; u32 gusbcfg; dev_vdbg(hsotg->dev, "%s()\n", __func__); /* Wait for AHB master IDLE state */ do { usleep_range(20000, 40000); greset = readl(hsotg->regs + GRSTCTL); if (++count > 50) { dev_warn(hsotg->dev, "%s() HANG! AHB Idle GRSTCTL=%0x\n", __func__, greset); return -EBUSY; } } while (!(greset & GRSTCTL_AHBIDLE)); /* Core Soft Reset */ count = 0; greset |= GRSTCTL_CSFTRST; writel(greset, hsotg->regs + GRSTCTL); do { usleep_range(20000, 40000); greset = readl(hsotg->regs + GRSTCTL); if (++count > 50) { dev_warn(hsotg->dev, "%s() HANG! Soft Reset GRSTCTL=%0x\n", __func__, greset); return -EBUSY; } } while (greset & GRSTCTL_CSFTRST); if (hsotg->dr_mode == USB_DR_MODE_HOST) { gusbcfg = readl(hsotg->regs + GUSBCFG); gusbcfg &= ~GUSBCFG_FORCEDEVMODE; gusbcfg |= GUSBCFG_FORCEHOSTMODE; writel(gusbcfg, hsotg->regs + GUSBCFG); } else if (hsotg->dr_mode == USB_DR_MODE_PERIPHERAL) { gusbcfg = readl(hsotg->regs + GUSBCFG); gusbcfg &= ~GUSBCFG_FORCEHOSTMODE; gusbcfg |= GUSBCFG_FORCEDEVMODE; writel(gusbcfg, hsotg->regs + GUSBCFG); } else if (hsotg->dr_mode == USB_DR_MODE_OTG) { gusbcfg = readl(hsotg->regs + GUSBCFG); gusbcfg &= ~GUSBCFG_FORCEHOSTMODE; gusbcfg &= ~GUSBCFG_FORCEDEVMODE; writel(gusbcfg, hsotg->regs + GUSBCFG); } /* * NOTE: This long sleep is _very_ important, otherwise the core will * not stay in host mode after a connector ID change! */ usleep_range(150000, 200000); return 0; } static int dwc2_fs_phy_init(struct dwc2_hsotg *hsotg, bool select_phy) { u32 usbcfg, i2cctl; int retval = 0; /* * core_init() is now called on every switch so only call the * following for the first time through */ if (select_phy) { dev_dbg(hsotg->dev, "FS PHY selected\n"); usbcfg = readl(hsotg->regs + GUSBCFG); usbcfg |= GUSBCFG_PHYSEL; writel(usbcfg, hsotg->regs + GUSBCFG); /* Reset after a PHY select */ retval = dwc2_core_reset(hsotg); if (retval) { dev_err(hsotg->dev, "%s() Reset failed, aborting", __func__); return retval; } } /* * Program DCFG.DevSpd or HCFG.FSLSPclkSel to 48Mhz in FS. Also * do this on HNP Dev/Host mode switches (done in dev_init and * host_init). */ if (dwc2_is_host_mode(hsotg)) dwc2_init_fs_ls_pclk_sel(hsotg); if (hsotg->core_params->i2c_enable > 0) { dev_dbg(hsotg->dev, "FS PHY enabling I2C\n"); /* Program GUSBCFG.OtgUtmiFsSel to I2C */ usbcfg = readl(hsotg->regs + GUSBCFG); usbcfg |= GUSBCFG_OTG_UTMI_FS_SEL; writel(usbcfg, hsotg->regs + GUSBCFG); /* Program GI2CCTL.I2CEn */ i2cctl = readl(hsotg->regs + GI2CCTL); i2cctl &= ~GI2CCTL_I2CDEVADDR_MASK; i2cctl |= 1 << GI2CCTL_I2CDEVADDR_SHIFT; i2cctl &= ~GI2CCTL_I2CEN; writel(i2cctl, hsotg->regs + GI2CCTL); i2cctl |= GI2CCTL_I2CEN; writel(i2cctl, hsotg->regs + GI2CCTL); } return retval; } static int dwc2_hs_phy_init(struct dwc2_hsotg *hsotg, bool select_phy) { u32 usbcfg; int retval = 0; if (!select_phy) return 0; usbcfg = readl(hsotg->regs + GUSBCFG); /* * HS PHY parameters. These parameters are preserved during soft reset * so only program the first time. Do a soft reset immediately after * setting phyif. */ switch (hsotg->core_params->phy_type) { case DWC2_PHY_TYPE_PARAM_ULPI: /* ULPI interface */ dev_dbg(hsotg->dev, "HS ULPI PHY selected\n"); usbcfg |= GUSBCFG_ULPI_UTMI_SEL; usbcfg &= ~(GUSBCFG_PHYIF16 | GUSBCFG_DDRSEL); if (hsotg->core_params->phy_ulpi_ddr > 0) usbcfg |= GUSBCFG_DDRSEL; break; case DWC2_PHY_TYPE_PARAM_UTMI: /* UTMI+ interface */ dev_dbg(hsotg->dev, "HS UTMI+ PHY selected\n"); usbcfg &= ~(GUSBCFG_ULPI_UTMI_SEL | GUSBCFG_PHYIF16); if (hsotg->core_params->phy_utmi_width == 16) usbcfg |= GUSBCFG_PHYIF16; break; default: dev_err(hsotg->dev, "FS PHY selected at HS!\n"); break; } writel(usbcfg, hsotg->regs + GUSBCFG); /* Reset after setting the PHY parameters */ retval = dwc2_core_reset(hsotg); if (retval) { dev_err(hsotg->dev, "%s() Reset failed, aborting", __func__); return retval; } return retval; } static int dwc2_phy_init(struct dwc2_hsotg *hsotg, bool select_phy) { u32 usbcfg; int retval = 0; if (hsotg->core_params->speed == DWC2_SPEED_PARAM_FULL && hsotg->core_params->phy_type == DWC2_PHY_TYPE_PARAM_FS) { /* If FS mode with FS PHY */ retval = dwc2_fs_phy_init(hsotg, select_phy); if (retval) return retval; } else { /* High speed PHY */ retval = dwc2_hs_phy_init(hsotg, select_phy); if (retval) return retval; } if (hsotg->hw_params.hs_phy_type == GHWCFG2_HS_PHY_TYPE_ULPI && hsotg->hw_params.fs_phy_type == GHWCFG2_FS_PHY_TYPE_DEDICATED && hsotg->core_params->ulpi_fs_ls > 0) { dev_dbg(hsotg->dev, "Setting ULPI FSLS\n"); usbcfg = readl(hsotg->regs + GUSBCFG); usbcfg |= GUSBCFG_ULPI_FS_LS; usbcfg |= GUSBCFG_ULPI_CLK_SUSP_M; writel(usbcfg, hsotg->regs + GUSBCFG); } else { usbcfg = readl(hsotg->regs + GUSBCFG); usbcfg &= ~GUSBCFG_ULPI_FS_LS; usbcfg &= ~GUSBCFG_ULPI_CLK_SUSP_M; writel(usbcfg, hsotg->regs + GUSBCFG); } return retval; } static int dwc2_gahbcfg_init(struct dwc2_hsotg *hsotg) { u32 ahbcfg = readl(hsotg->regs + GAHBCFG); switch (hsotg->hw_params.arch) { case GHWCFG2_EXT_DMA_ARCH: dev_err(hsotg->dev, "External DMA Mode not supported\n"); return -EINVAL; case GHWCFG2_INT_DMA_ARCH: dev_dbg(hsotg->dev, "Internal DMA Mode\n"); if (hsotg->core_params->ahbcfg != -1) { ahbcfg &= GAHBCFG_CTRL_MASK; ahbcfg |= hsotg->core_params->ahbcfg & ~GAHBCFG_CTRL_MASK; } break; case GHWCFG2_SLAVE_ONLY_ARCH: default: dev_dbg(hsotg->dev, "Slave Only Mode\n"); break; } dev_dbg(hsotg->dev, "dma_enable:%d dma_desc_enable:%d\n", hsotg->core_params->dma_enable, hsotg->core_params->dma_desc_enable); if (hsotg->core_params->dma_enable > 0) { if (hsotg->core_params->dma_desc_enable > 0) dev_dbg(hsotg->dev, "Using Descriptor DMA mode\n"); else dev_dbg(hsotg->dev, "Using Buffer DMA mode\n"); } else { dev_dbg(hsotg->dev, "Using Slave mode\n"); hsotg->core_params->dma_desc_enable = 0; } if (hsotg->core_params->dma_enable > 0) ahbcfg |= GAHBCFG_DMA_EN; writel(ahbcfg, hsotg->regs + GAHBCFG); return 0; } static void dwc2_gusbcfg_init(struct dwc2_hsotg *hsotg) { u32 usbcfg; usbcfg = readl(hsotg->regs + GUSBCFG); usbcfg &= ~(GUSBCFG_HNPCAP | GUSBCFG_SRPCAP); switch (hsotg->hw_params.op_mode) { case GHWCFG2_OP_MODE_HNP_SRP_CAPABLE: if (hsotg->core_params->otg_cap == DWC2_CAP_PARAM_HNP_SRP_CAPABLE) usbcfg |= GUSBCFG_HNPCAP; if (hsotg->core_params->otg_cap != DWC2_CAP_PARAM_NO_HNP_SRP_CAPABLE) usbcfg |= GUSBCFG_SRPCAP; break; case GHWCFG2_OP_MODE_SRP_ONLY_CAPABLE: case GHWCFG2_OP_MODE_SRP_CAPABLE_DEVICE: case GHWCFG2_OP_MODE_SRP_CAPABLE_HOST: if (hsotg->core_params->otg_cap != DWC2_CAP_PARAM_NO_HNP_SRP_CAPABLE) usbcfg |= GUSBCFG_SRPCAP; break; case GHWCFG2_OP_MODE_NO_HNP_SRP_CAPABLE: case GHWCFG2_OP_MODE_NO_SRP_CAPABLE_DEVICE: case GHWCFG2_OP_MODE_NO_SRP_CAPABLE_HOST: default: break; } writel(usbcfg, hsotg->regs + GUSBCFG); } /** * dwc2_core_init() - Initializes the DWC_otg controller registers and * prepares the core for device mode or host mode operation * * @hsotg: Programming view of the DWC_otg controller * @select_phy: If true then also set the Phy type * @irq: If >= 0, the irq to register */ int dwc2_core_init(struct dwc2_hsotg *hsotg, bool select_phy, int irq) { u32 usbcfg, otgctl; int retval; dev_dbg(hsotg->dev, "%s(%p)\n", __func__, hsotg); usbcfg = readl(hsotg->regs + GUSBCFG); /* Set ULPI External VBUS bit if needed */ usbcfg &= ~GUSBCFG_ULPI_EXT_VBUS_DRV; if (hsotg->core_params->phy_ulpi_ext_vbus == DWC2_PHY_ULPI_EXTERNAL_VBUS) usbcfg |= GUSBCFG_ULPI_EXT_VBUS_DRV; /* Set external TS Dline pulsing bit if needed */ usbcfg &= ~GUSBCFG_TERMSELDLPULSE; if (hsotg->core_params->ts_dline > 0) usbcfg |= GUSBCFG_TERMSELDLPULSE; writel(usbcfg, hsotg->regs + GUSBCFG); /* Reset the Controller */ retval = dwc2_core_reset(hsotg); if (retval) { dev_err(hsotg->dev, "%s(): Reset failed, aborting\n", __func__); return retval; } /* * This needs to happen in FS mode before any other programming occurs */ retval = dwc2_phy_init(hsotg, select_phy); if (retval) return retval; /* Program the GAHBCFG Register */ retval = dwc2_gahbcfg_init(hsotg); if (retval) return retval; /* Program the GUSBCFG register */ dwc2_gusbcfg_init(hsotg); /* Program the GOTGCTL register */ otgctl = readl(hsotg->regs + GOTGCTL); otgctl &= ~GOTGCTL_OTGVER; if (hsotg->core_params->otg_ver > 0) otgctl |= GOTGCTL_OTGVER; writel(otgctl, hsotg->regs + GOTGCTL); dev_dbg(hsotg->dev, "OTG VER PARAM: %d\n", hsotg->core_params->otg_ver); /* Clear the SRP success bit for FS-I2c */ hsotg->srp_success = 0; /* Enable common interrupts */ dwc2_enable_common_interrupts(hsotg); /* * Do device or host initialization based on mode during PCD and * HCD initialization */ if (dwc2_is_host_mode(hsotg)) { dev_dbg(hsotg->dev, "Host Mode\n"); hsotg->op_state = OTG_STATE_A_HOST; } else { dev_dbg(hsotg->dev, "Device Mode\n"); hsotg->op_state = OTG_STATE_B_PERIPHERAL; } return 0; } /** * dwc2_enable_host_interrupts() - Enables the Host mode interrupts * * @hsotg: Programming view of DWC_otg controller */ void dwc2_enable_host_interrupts(struct dwc2_hsotg *hsotg) { u32 intmsk; dev_dbg(hsotg->dev, "%s()\n", __func__); /* Disable all interrupts */ writel(0, hsotg->regs + GINTMSK); writel(0, hsotg->regs + HAINTMSK); /* Enable the common interrupts */ dwc2_enable_common_interrupts(hsotg); /* Enable host mode interrupts without disturbing common interrupts */ intmsk = readl(hsotg->regs + GINTMSK); intmsk |= GINTSTS_DISCONNINT | GINTSTS_PRTINT | GINTSTS_HCHINT; writel(intmsk, hsotg->regs + GINTMSK); } /** * dwc2_disable_host_interrupts() - Disables the Host Mode interrupts * * @hsotg: Programming view of DWC_otg controller */ void dwc2_disable_host_interrupts(struct dwc2_hsotg *hsotg) { u32 intmsk = readl(hsotg->regs + GINTMSK); /* Disable host mode interrupts without disturbing common interrupts */ intmsk &= ~(GINTSTS_SOF | GINTSTS_PRTINT | GINTSTS_HCHINT | GINTSTS_PTXFEMP | GINTSTS_NPTXFEMP); writel(intmsk, hsotg->regs + GINTMSK); } /* * dwc2_calculate_dynamic_fifo() - Calculates the default fifo size * For system that have a total fifo depth that is smaller than the default * RX + TX fifo size. * * @hsotg: Programming view of DWC_otg controller */ static void dwc2_calculate_dynamic_fifo(struct dwc2_hsotg *hsotg) { struct dwc2_core_params *params = hsotg->core_params; struct dwc2_hw_params *hw = &hsotg->hw_params; u32 rxfsiz, nptxfsiz, ptxfsiz, total_fifo_size; total_fifo_size = hw->total_fifo_size; rxfsiz = params->host_rx_fifo_size; nptxfsiz = params->host_nperio_tx_fifo_size; ptxfsiz = params->host_perio_tx_fifo_size; /* * Will use Method 2 defined in the DWC2 spec: minimum FIFO depth * allocation with support for high bandwidth endpoints. Synopsys * defines MPS(Max Packet size) for a periodic EP=1024, and for * non-periodic as 512. */ if (total_fifo_size < (rxfsiz + nptxfsiz + ptxfsiz)) { /* * For Buffer DMA mode/Scatter Gather DMA mode * 2 * ((Largest Packet size / 4) + 1 + 1) + n * with n = number of host channel. * 2 * ((1024/4) + 2) = 516 */ rxfsiz = 516 + hw->host_channels; /* * min non-periodic tx fifo depth * 2 * (largest non-periodic USB packet used / 4) * 2 * (512/4) = 256 */ nptxfsiz = 256; /* * min periodic tx fifo depth * (largest packet size*MC)/4 * (1024 * 3)/4 = 768 */ ptxfsiz = 768; params->host_rx_fifo_size = rxfsiz; params->host_nperio_tx_fifo_size = nptxfsiz; params->host_perio_tx_fifo_size = ptxfsiz; } /* * If the summation of RX, NPTX and PTX fifo sizes is still * bigger than the total_fifo_size, then we have a problem. * * We won't be able to allocate as many endpoints. Right now, * we're just printing an error message, but ideally this FIFO * allocation algorithm would be improved in the future. * * FIXME improve this FIFO allocation algorithm. */ if (unlikely(total_fifo_size < (rxfsiz + nptxfsiz + ptxfsiz))) dev_err(hsotg->dev, "invalid fifo sizes\n"); } static void dwc2_config_fifos(struct dwc2_hsotg *hsotg) { struct dwc2_core_params *params = hsotg->core_params; u32 nptxfsiz, hptxfsiz, dfifocfg, grxfsiz; if (!params->enable_dynamic_fifo) return; dwc2_calculate_dynamic_fifo(hsotg); /* Rx FIFO */ grxfsiz = readl(hsotg->regs + GRXFSIZ); dev_dbg(hsotg->dev, "initial grxfsiz=%08x\n", grxfsiz); grxfsiz &= ~GRXFSIZ_DEPTH_MASK; grxfsiz |= params->host_rx_fifo_size << GRXFSIZ_DEPTH_SHIFT & GRXFSIZ_DEPTH_MASK; writel(grxfsiz, hsotg->regs + GRXFSIZ); dev_dbg(hsotg->dev, "new grxfsiz=%08x\n", readl(hsotg->regs + GRXFSIZ)); /* Non-periodic Tx FIFO */ dev_dbg(hsotg->dev, "initial gnptxfsiz=%08x\n", readl(hsotg->regs + GNPTXFSIZ)); nptxfsiz = params->host_nperio_tx_fifo_size << FIFOSIZE_DEPTH_SHIFT & FIFOSIZE_DEPTH_MASK; nptxfsiz |= params->host_rx_fifo_size << FIFOSIZE_STARTADDR_SHIFT & FIFOSIZE_STARTADDR_MASK; writel(nptxfsiz, hsotg->regs + GNPTXFSIZ); dev_dbg(hsotg->dev, "new gnptxfsiz=%08x\n", readl(hsotg->regs + GNPTXFSIZ)); /* Periodic Tx FIFO */ dev_dbg(hsotg->dev, "initial hptxfsiz=%08x\n", readl(hsotg->regs + HPTXFSIZ)); hptxfsiz = params->host_perio_tx_fifo_size << FIFOSIZE_DEPTH_SHIFT & FIFOSIZE_DEPTH_MASK; hptxfsiz |= (params->host_rx_fifo_size + params->host_nperio_tx_fifo_size) << FIFOSIZE_STARTADDR_SHIFT & FIFOSIZE_STARTADDR_MASK; writel(hptxfsiz, hsotg->regs + HPTXFSIZ); dev_dbg(hsotg->dev, "new hptxfsiz=%08x\n", readl(hsotg->regs + HPTXFSIZ)); if (hsotg->core_params->en_multiple_tx_fifo > 0 && hsotg->hw_params.snpsid <= DWC2_CORE_REV_2_94a) { /* * Global DFIFOCFG calculation for Host mode - * include RxFIFO, NPTXFIFO and HPTXFIFO */ dfifocfg = readl(hsotg->regs + GDFIFOCFG); dfifocfg &= ~GDFIFOCFG_EPINFOBASE_MASK; dfifocfg |= (params->host_rx_fifo_size + params->host_nperio_tx_fifo_size + params->host_perio_tx_fifo_size) << GDFIFOCFG_EPINFOBASE_SHIFT & GDFIFOCFG_EPINFOBASE_MASK; writel(dfifocfg, hsotg->regs + GDFIFOCFG); } } /** * dwc2_core_host_init() - Initializes the DWC_otg controller registers for * Host mode * * @hsotg: Programming view of DWC_otg controller * * This function flushes the Tx and Rx FIFOs and flushes any entries in the * request queues. Host channels are reset to ensure that they are ready for * performing transfers. */ void dwc2_core_host_init(struct dwc2_hsotg *hsotg) { u32 hcfg, hfir, otgctl; dev_dbg(hsotg->dev, "%s(%p)\n", __func__, hsotg); /* Restart the Phy Clock */ writel(0, hsotg->regs + PCGCTL); /* Initialize Host Configuration Register */ dwc2_init_fs_ls_pclk_sel(hsotg); if (hsotg->core_params->speed == DWC2_SPEED_PARAM_FULL) { hcfg = readl(hsotg->regs + HCFG); hcfg |= HCFG_FSLSSUPP; writel(hcfg, hsotg->regs + HCFG); } /* * This bit allows dynamic reloading of the HFIR register during * runtime. This bit needs to be programmed during initial configuration * and its value must not be changed during runtime. */ if (hsotg->core_params->reload_ctl > 0) { hfir = readl(hsotg->regs + HFIR); hfir |= HFIR_RLDCTRL; writel(hfir, hsotg->regs + HFIR); } if (hsotg->core_params->dma_desc_enable > 0) { u32 op_mode = hsotg->hw_params.op_mode; if (hsotg->hw_params.snpsid < DWC2_CORE_REV_2_90a || !hsotg->hw_params.dma_desc_enable || op_mode == GHWCFG2_OP_MODE_SRP_CAPABLE_DEVICE || op_mode == GHWCFG2_OP_MODE_NO_SRP_CAPABLE_DEVICE || op_mode == GHWCFG2_OP_MODE_UNDEFINED) { dev_err(hsotg->dev, "Hardware does not support descriptor DMA mode -\n"); dev_err(hsotg->dev, "falling back to buffer DMA mode.\n"); hsotg->core_params->dma_desc_enable = 0; } else { hcfg = readl(hsotg->regs + HCFG); hcfg |= HCFG_DESCDMA; writel(hcfg, hsotg->regs + HCFG); } } /* Configure data FIFO sizes */ dwc2_config_fifos(hsotg); /* TODO - check this */ /* Clear Host Set HNP Enable in the OTG Control Register */ otgctl = readl(hsotg->regs + GOTGCTL); otgctl &= ~GOTGCTL_HSTSETHNPEN; writel(otgctl, hsotg->regs + GOTGCTL); /* Make sure the FIFOs are flushed */ dwc2_flush_tx_fifo(hsotg, 0x10 /* all TX FIFOs */); dwc2_flush_rx_fifo(hsotg); /* Clear Host Set HNP Enable in the OTG Control Register */ otgctl = readl(hsotg->regs + GOTGCTL); otgctl &= ~GOTGCTL_HSTSETHNPEN; writel(otgctl, hsotg->regs + GOTGCTL); if (hsotg->core_params->dma_desc_enable <= 0) { int num_channels, i; u32 hcchar; /* Flush out any leftover queued requests */ num_channels = hsotg->core_params->host_channels; for (i = 0; i < num_channels; i++) { hcchar = readl(hsotg->regs + HCCHAR(i)); hcchar &= ~HCCHAR_CHENA; hcchar |= HCCHAR_CHDIS; hcchar &= ~HCCHAR_EPDIR; writel(hcchar, hsotg->regs + HCCHAR(i)); } /* Halt all channels to put them into a known state */ for (i = 0; i < num_channels; i++) { int count = 0; hcchar = readl(hsotg->regs + HCCHAR(i)); hcchar |= HCCHAR_CHENA | HCCHAR_CHDIS; hcchar &= ~HCCHAR_EPDIR; writel(hcchar, hsotg->regs + HCCHAR(i)); dev_dbg(hsotg->dev, "%s: Halt channel %d\n", __func__, i); do { hcchar = readl(hsotg->regs + HCCHAR(i)); if (++count > 1000) { dev_err(hsotg->dev, "Unable to clear enable on channel %d\n", i); break; } udelay(1); } while (hcchar & HCCHAR_CHENA); } } /* Turn on the vbus power */ dev_dbg(hsotg->dev, "Init: Port Power? op_state=%d\n", hsotg->op_state); if (hsotg->op_state == OTG_STATE_A_HOST) { u32 hprt0 = dwc2_read_hprt0(hsotg); dev_dbg(hsotg->dev, "Init: Power Port (%d)\n", !!(hprt0 & HPRT0_PWR)); if (!(hprt0 & HPRT0_PWR)) { hprt0 |= HPRT0_PWR; writel(hprt0, hsotg->regs + HPRT0); } } dwc2_enable_host_interrupts(hsotg); } static void dwc2_hc_enable_slave_ints(struct dwc2_hsotg *hsotg, struct dwc2_host_chan *chan) { u32 hcintmsk = HCINTMSK_CHHLTD; switch (chan->ep_type) { case USB_ENDPOINT_XFER_CONTROL: case USB_ENDPOINT_XFER_BULK: dev_vdbg(hsotg->dev, "control/bulk\n"); hcintmsk |= HCINTMSK_XFERCOMPL; hcintmsk |= HCINTMSK_STALL; hcintmsk |= HCINTMSK_XACTERR; hcintmsk |= HCINTMSK_DATATGLERR; if (chan->ep_is_in) { hcintmsk |= HCINTMSK_BBLERR; } else { hcintmsk |= HCINTMSK_NAK; hcintmsk |= HCINTMSK_NYET; if (chan->do_ping) hcintmsk |= HCINTMSK_ACK; } if (chan->do_split) { hcintmsk |= HCINTMSK_NAK; if (chan->complete_split) hcintmsk |= HCINTMSK_NYET; else hcintmsk |= HCINTMSK_ACK; } if (chan->error_state) hcintmsk |= HCINTMSK_ACK; break; case USB_ENDPOINT_XFER_INT: if (dbg_perio()) dev_vdbg(hsotg->dev, "intr\n"); hcintmsk |= HCINTMSK_XFERCOMPL; hcintmsk |= HCINTMSK_NAK; hcintmsk |= HCINTMSK_STALL; hcintmsk |= HCINTMSK_XACTERR; hcintmsk |= HCINTMSK_DATATGLERR; hcintmsk |= HCINTMSK_FRMOVRUN; if (chan->ep_is_in) hcintmsk |= HCINTMSK_BBLERR; if (chan->error_state) hcintmsk |= HCINTMSK_ACK; if (chan->do_split) { if (chan->complete_split) hcintmsk |= HCINTMSK_NYET; else hcintmsk |= HCINTMSK_ACK; } break; case USB_ENDPOINT_XFER_ISOC: if (dbg_perio()) dev_vdbg(hsotg->dev, "isoc\n"); hcintmsk |= HCINTMSK_XFERCOMPL; hcintmsk |= HCINTMSK_FRMOVRUN; hcintmsk |= HCINTMSK_ACK; if (chan->ep_is_in) { hcintmsk |= HCINTMSK_XACTERR; hcintmsk |= HCINTMSK_BBLERR; } break; default: dev_err(hsotg->dev, "## Unknown EP type ##\n"); break; } writel(hcintmsk, hsotg->regs + HCINTMSK(chan->hc_num)); if (dbg_hc(chan)) dev_vdbg(hsotg->dev, "set HCINTMSK to %08x\n", hcintmsk); } static void dwc2_hc_enable_dma_ints(struct dwc2_hsotg *hsotg, struct dwc2_host_chan *chan) { u32 hcintmsk = HCINTMSK_CHHLTD; /* * For Descriptor DMA mode core halts the channel on AHB error. * Interrupt is not required. */ if (hsotg->core_params->dma_desc_enable <= 0) { if (dbg_hc(chan)) dev_vdbg(hsotg->dev, "desc DMA disabled\n"); hcintmsk |= HCINTMSK_AHBERR; } else { if (dbg_hc(chan)) dev_vdbg(hsotg->dev, "desc DMA enabled\n"); if (chan->ep_type == USB_ENDPOINT_XFER_ISOC) hcintmsk |= HCINTMSK_XFERCOMPL; } if (chan->error_state && !chan->do_split && chan->ep_type != USB_ENDPOINT_XFER_ISOC) { if (dbg_hc(chan)) dev_vdbg(hsotg->dev, "setting ACK\n"); hcintmsk |= HCINTMSK_ACK; if (chan->ep_is_in) { hcintmsk |= HCINTMSK_DATATGLERR; if (chan->ep_type != USB_ENDPOINT_XFER_INT) hcintmsk |= HCINTMSK_NAK; } } writel(hcintmsk, hsotg->regs + HCINTMSK(chan->hc_num)); if (dbg_hc(chan)) dev_vdbg(hsotg->dev, "set HCINTMSK to %08x\n", hcintmsk); } static void dwc2_hc_enable_ints(struct dwc2_hsotg *hsotg, struct dwc2_host_chan *chan) { u32 intmsk; if (hsotg->core_params->dma_enable > 0) { if (dbg_hc(chan)) dev_vdbg(hsotg->dev, "DMA enabled\n"); dwc2_hc_enable_dma_ints(hsotg, chan); } else { if (dbg_hc(chan)) dev_vdbg(hsotg->dev, "DMA disabled\n"); dwc2_hc_enable_slave_ints(hsotg, chan); } /* Enable the top level host channel interrupt */ intmsk = readl(hsotg->regs + HAINTMSK); intmsk |= 1 << chan->hc_num; writel(intmsk, hsotg->regs + HAINTMSK); if (dbg_hc(chan)) dev_vdbg(hsotg->dev, "set HAINTMSK to %08x\n", intmsk); /* Make sure host channel interrupts are enabled */ intmsk = readl(hsotg->regs + GINTMSK); intmsk |= GINTSTS_HCHINT; writel(intmsk, hsotg->regs + GINTMSK); if (dbg_hc(chan)) dev_vdbg(hsotg->dev, "set GINTMSK to %08x\n", intmsk); } /** * dwc2_hc_init() - Prepares a host channel for transferring packets to/from * a specific endpoint * * @hsotg: Programming view of DWC_otg controller * @chan: Information needed to initialize the host channel * * The HCCHARn register is set up with the characteristics specified in chan. * Host channel interrupts that may need to be serviced while this transfer is * in progress are enabled. */ void dwc2_hc_init(struct dwc2_hsotg *hsotg, struct dwc2_host_chan *chan) { u8 hc_num = chan->hc_num; u32 hcintmsk; u32 hcchar; u32 hcsplt = 0; if (dbg_hc(chan)) dev_vdbg(hsotg->dev, "%s()\n", __func__); /* Clear old interrupt conditions for this host channel */ hcintmsk = 0xffffffff; hcintmsk &= ~HCINTMSK_RESERVED14_31; writel(hcintmsk, hsotg->regs + HCINT(hc_num)); /* Enable channel interrupts required for this transfer */ dwc2_hc_enable_ints(hsotg, chan); /* * Program the HCCHARn register with the endpoint characteristics for * the current transfer */ hcchar = chan->dev_addr << HCCHAR_DEVADDR_SHIFT & HCCHAR_DEVADDR_MASK; hcchar |= chan->ep_num << HCCHAR_EPNUM_SHIFT & HCCHAR_EPNUM_MASK; if (chan->ep_is_in) hcchar |= HCCHAR_EPDIR; if (chan->speed == USB_SPEED_LOW) hcchar |= HCCHAR_LSPDDEV; hcchar |= chan->ep_type << HCCHAR_EPTYPE_SHIFT & HCCHAR_EPTYPE_MASK; hcchar |= chan->max_packet << HCCHAR_MPS_SHIFT & HCCHAR_MPS_MASK; writel(hcchar, hsotg->regs + HCCHAR(hc_num)); if (dbg_hc(chan)) { dev_vdbg(hsotg->dev, "set HCCHAR(%d) to %08x\n", hc_num, hcchar); dev_vdbg(hsotg->dev, "%s: Channel %d\n", __func__, hc_num); dev_vdbg(hsotg->dev, " Dev Addr: %d\n", chan->dev_addr); dev_vdbg(hsotg->dev, " Ep Num: %d\n", chan->ep_num); dev_vdbg(hsotg->dev, " Is In: %d\n", chan->ep_is_in); dev_vdbg(hsotg->dev, " Is Low Speed: %d\n", chan->speed == USB_SPEED_LOW); dev_vdbg(hsotg->dev, " Ep Type: %d\n", chan->ep_type); dev_vdbg(hsotg->dev, " Max Pkt: %d\n", chan->max_packet); } /* Program the HCSPLT register for SPLITs */ if (chan->do_split) { if (dbg_hc(chan)) dev_vdbg(hsotg->dev, "Programming HC %d with split --> %s\n", hc_num, chan->complete_split ? "CSPLIT" : "SSPLIT"); if (chan->complete_split) hcsplt |= HCSPLT_COMPSPLT; hcsplt |= chan->xact_pos << HCSPLT_XACTPOS_SHIFT & HCSPLT_XACTPOS_MASK; hcsplt |= chan->hub_addr << HCSPLT_HUBADDR_SHIFT & HCSPLT_HUBADDR_MASK; hcsplt |= chan->hub_port << HCSPLT_PRTADDR_SHIFT & HCSPLT_PRTADDR_MASK; if (dbg_hc(chan)) { dev_vdbg(hsotg->dev, " comp split %d\n", chan->complete_split); dev_vdbg(hsotg->dev, " xact pos %d\n", chan->xact_pos); dev_vdbg(hsotg->dev, " hub addr %d\n", chan->hub_addr); dev_vdbg(hsotg->dev, " hub port %d\n", chan->hub_port); dev_vdbg(hsotg->dev, " is_in %d\n", chan->ep_is_in); dev_vdbg(hsotg->dev, " Max Pkt %d\n", chan->max_packet); dev_vdbg(hsotg->dev, " xferlen %d\n", chan->xfer_len); } } writel(hcsplt, hsotg->regs + HCSPLT(hc_num)); } /** * dwc2_hc_halt() - Attempts to halt a host channel * * @hsotg: Controller register interface * @chan: Host channel to halt * @halt_status: Reason for halting the channel * * This function should only be called in Slave mode or to abort a transfer in * either Slave mode or DMA mode. Under normal circumstances in DMA mode, the * controller halts the channel when the transfer is complete or a condition * occurs that requires application intervention. * * In slave mode, checks for a free request queue entry, then sets the Channel * Enable and Channel Disable bits of the Host Channel Characteristics * register of the specified channel to intiate the halt. If there is no free * request queue entry, sets only the Channel Disable bit of the HCCHARn * register to flush requests for this channel. In the latter case, sets a * flag to indicate that the host channel needs to be halted when a request * queue slot is open. * * In DMA mode, always sets the Channel Enable and Channel Disable bits of the * HCCHARn register. The controller ensures there is space in the request * queue before submitting the halt request. * * Some time may elapse before the core flushes any posted requests for this * host channel and halts. The Channel Halted interrupt handler completes the * deactivation of the host channel. */ void dwc2_hc_halt(struct dwc2_hsotg *hsotg, struct dwc2_host_chan *chan, enum dwc2_halt_status halt_status) { u32 nptxsts, hptxsts, hcchar; if (dbg_hc(chan)) dev_vdbg(hsotg->dev, "%s()\n", __func__); if (halt_status == DWC2_HC_XFER_NO_HALT_STATUS) dev_err(hsotg->dev, "!!! halt_status = %d !!!\n", halt_status); if (halt_status == DWC2_HC_XFER_URB_DEQUEUE || halt_status == DWC2_HC_XFER_AHB_ERR) { /* * Disable all channel interrupts except Ch Halted. The QTD * and QH state associated with this transfer has been cleared * (in the case of URB_DEQUEUE), so the channel needs to be * shut down carefully to prevent crashes. */ u32 hcintmsk = HCINTMSK_CHHLTD; dev_vdbg(hsotg->dev, "dequeue/error\n"); writel(hcintmsk, hsotg->regs + HCINTMSK(chan->hc_num)); /* * Make sure no other interrupts besides halt are currently * pending. Handling another interrupt could cause a crash due * to the QTD and QH state. */ writel(~hcintmsk, hsotg->regs + HCINT(chan->hc_num)); /* * Make sure the halt status is set to URB_DEQUEUE or AHB_ERR * even if the channel was already halted for some other * reason */ chan->halt_status = halt_status; hcchar = readl(hsotg->regs + HCCHAR(chan->hc_num)); if (!(hcchar & HCCHAR_CHENA)) { /* * The channel is either already halted or it hasn't * started yet. In DMA mode, the transfer may halt if * it finishes normally or a condition occurs that * requires driver intervention. Don't want to halt * the channel again. In either Slave or DMA mode, * it's possible that the transfer has been assigned * to a channel, but not started yet when an URB is * dequeued. Don't want to halt a channel that hasn't * started yet. */ return; } } if (chan->halt_pending) { /* * A halt has already been issued for this channel. This might * happen when a transfer is aborted by a higher level in * the stack. */ dev_vdbg(hsotg->dev, "*** %s: Channel %d, chan->halt_pending already set ***\n", __func__, chan->hc_num); return; } hcchar = readl(hsotg->regs + HCCHAR(chan->hc_num)); /* No need to set the bit in DDMA for disabling the channel */ /* TODO check it everywhere channel is disabled */ if (hsotg->core_params->dma_desc_enable <= 0) { if (dbg_hc(chan)) dev_vdbg(hsotg->dev, "desc DMA disabled\n"); hcchar |= HCCHAR_CHENA; } else { if (dbg_hc(chan)) dev_dbg(hsotg->dev, "desc DMA enabled\n"); } hcchar |= HCCHAR_CHDIS; if (hsotg->core_params->dma_enable <= 0) { if (dbg_hc(chan)) dev_vdbg(hsotg->dev, "DMA not enabled\n"); hcchar |= HCCHAR_CHENA; /* Check for space in the request queue to issue the halt */ if (chan->ep_type == USB_ENDPOINT_XFER_CONTROL || chan->ep_type == USB_ENDPOINT_XFER_BULK) { dev_vdbg(hsotg->dev, "control/bulk\n"); nptxsts = readl(hsotg->regs + GNPTXSTS); if ((nptxsts & TXSTS_QSPCAVAIL_MASK) == 0) { dev_vdbg(hsotg->dev, "Disabling channel\n"); hcchar &= ~HCCHAR_CHENA; } } else { if (dbg_perio()) dev_vdbg(hsotg->dev, "isoc/intr\n"); hptxsts = readl(hsotg->regs + HPTXSTS); if ((hptxsts & TXSTS_QSPCAVAIL_MASK) == 0 || hsotg->queuing_high_bandwidth) { if (dbg_perio()) dev_vdbg(hsotg->dev, "Disabling channel\n"); hcchar &= ~HCCHAR_CHENA; } } } else { if (dbg_hc(chan)) dev_vdbg(hsotg->dev, "DMA enabled\n"); } writel(hcchar, hsotg->regs + HCCHAR(chan->hc_num)); chan->halt_status = halt_status; if (hcchar & HCCHAR_CHENA) { if (dbg_hc(chan)) dev_vdbg(hsotg->dev, "Channel enabled\n"); chan->halt_pending = 1; chan->halt_on_queue = 0; } else { if (dbg_hc(chan)) dev_vdbg(hsotg->dev, "Channel disabled\n"); chan->halt_on_queue = 1; } if (dbg_hc(chan)) { dev_vdbg(hsotg->dev, "%s: Channel %d\n", __func__, chan->hc_num); dev_vdbg(hsotg->dev, " hcchar: 0x%08x\n", hcchar); dev_vdbg(hsotg->dev, " halt_pending: %d\n", chan->halt_pending); dev_vdbg(hsotg->dev, " halt_on_queue: %d\n", chan->halt_on_queue); dev_vdbg(hsotg->dev, " halt_status: %d\n", chan->halt_status); } } /** * dwc2_hc_cleanup() - Clears the transfer state for a host channel * * @hsotg: Programming view of DWC_otg controller * @chan: Identifies the host channel to clean up * * This function is normally called after a transfer is done and the host * channel is being released */ void dwc2_hc_cleanup(struct dwc2_hsotg *hsotg, struct dwc2_host_chan *chan) { u32 hcintmsk; chan->xfer_started = 0; /* * Clear channel interrupt enables and any unhandled channel interrupt * conditions */ writel(0, hsotg->regs + HCINTMSK(chan->hc_num)); hcintmsk = 0xffffffff; hcintmsk &= ~HCINTMSK_RESERVED14_31; writel(hcintmsk, hsotg->regs + HCINT(chan->hc_num)); } /** * dwc2_hc_set_even_odd_frame() - Sets the channel property that indicates in * which frame a periodic transfer should occur * * @hsotg: Programming view of DWC_otg controller * @chan: Identifies the host channel to set up and its properties * @hcchar: Current value of the HCCHAR register for the specified host channel * * This function has no effect on non-periodic transfers */ static void dwc2_hc_set_even_odd_frame(struct dwc2_hsotg *hsotg, struct dwc2_host_chan *chan, u32 *hcchar) { if (chan->ep_type == USB_ENDPOINT_XFER_INT || chan->ep_type == USB_ENDPOINT_XFER_ISOC) { /* 1 if _next_ frame is odd, 0 if it's even */ if (!(dwc2_hcd_get_frame_number(hsotg) & 0x1)) *hcchar |= HCCHAR_ODDFRM; } } static void dwc2_set_pid_isoc(struct dwc2_host_chan *chan) { /* Set up the initial PID for the transfer */ if (chan->speed == USB_SPEED_HIGH) { if (chan->ep_is_in) { if (chan->multi_count == 1) chan->data_pid_start = DWC2_HC_PID_DATA0; else if (chan->multi_count == 2) chan->data_pid_start = DWC2_HC_PID_DATA1; else chan->data_pid_start = DWC2_HC_PID_DATA2; } else { if (chan->multi_count == 1) chan->data_pid_start = DWC2_HC_PID_DATA0; else chan->data_pid_start = DWC2_HC_PID_MDATA; } } else { chan->data_pid_start = DWC2_HC_PID_DATA0; } } /** * dwc2_hc_write_packet() - Writes a packet into the Tx FIFO associated with * the Host Channel * * @hsotg: Programming view of DWC_otg controller * @chan: Information needed to initialize the host channel * * This function should only be called in Slave mode. For a channel associated * with a non-periodic EP, the non-periodic Tx FIFO is written. For a channel * associated with a periodic EP, the periodic Tx FIFO is written. * * Upon return the xfer_buf and xfer_count fields in chan are incremented by * the number of bytes written to the Tx FIFO. */ static void dwc2_hc_write_packet(struct dwc2_hsotg *hsotg, struct dwc2_host_chan *chan) { u32 i; u32 remaining_count; u32 byte_count; u32 dword_count; u32 __iomem *data_fifo; u32 *data_buf = (u32 *)chan->xfer_buf; if (dbg_hc(chan)) dev_vdbg(hsotg->dev, "%s()\n", __func__); data_fifo = (u32 __iomem *)(hsotg->regs + HCFIFO(chan->hc_num)); remaining_count = chan->xfer_len - chan->xfer_count; if (remaining_count > chan->max_packet) byte_count = chan->max_packet; else byte_count = remaining_count; dword_count = (byte_count + 3) / 4; if (((unsigned long)data_buf & 0x3) == 0) { /* xfer_buf is DWORD aligned */ for (i = 0; i < dword_count; i++, data_buf++) writel(*data_buf, data_fifo); } else { /* xfer_buf is not DWORD aligned */ for (i = 0; i < dword_count; i++, data_buf++) { u32 data = data_buf[0] | data_buf[1] << 8 | data_buf[2] << 16 | data_buf[3] << 24; writel(data, data_fifo); } } chan->xfer_count += byte_count; chan->xfer_buf += byte_count; } /** * dwc2_hc_start_transfer() - Does the setup for a data transfer for a host * channel and starts the transfer * * @hsotg: Programming view of DWC_otg controller * @chan: Information needed to initialize the host channel. The xfer_len value * may be reduced to accommodate the max widths of the XferSize and * PktCnt fields in the HCTSIZn register. The multi_count value may be * changed to reflect the final xfer_len value. * * This function may be called in either Slave mode or DMA mode. In Slave mode, * the caller must ensure that there is sufficient space in the request queue * and Tx Data FIFO. * * For an OUT transfer in Slave mode, it loads a data packet into the * appropriate FIFO. If necessary, additional data packets are loaded in the * Host ISR. * * For an IN transfer in Slave mode, a data packet is requested. The data * packets are unloaded from the Rx FIFO in the Host ISR. If necessary, * additional data packets are requested in the Host ISR. * * For a PING transfer in Slave mode, the Do Ping bit is set in the HCTSIZ * register along with a packet count of 1 and the channel is enabled. This * causes a single PING transaction to occur. Other fields in HCTSIZ are * simply set to 0 since no data transfer occurs in this case. * * For a PING transfer in DMA mode, the HCTSIZ register is initialized with * all the information required to perform the subsequent data transfer. In * addition, the Do Ping bit is set in the HCTSIZ register. In this case, the * controller performs the entire PING protocol, then starts the data * transfer. */ void dwc2_hc_start_transfer(struct dwc2_hsotg *hsotg, struct dwc2_host_chan *chan) { u32 max_hc_xfer_size = hsotg->core_params->max_transfer_size; u16 max_hc_pkt_count = hsotg->core_params->max_packet_count; u32 hcchar; u32 hctsiz = 0; u16 num_packets; if (dbg_hc(chan)) dev_vdbg(hsotg->dev, "%s()\n", __func__); if (chan->do_ping) { if (hsotg->core_params->dma_enable <= 0) { if (dbg_hc(chan)) dev_vdbg(hsotg->dev, "ping, no DMA\n"); dwc2_hc_do_ping(hsotg, chan); chan->xfer_started = 1; return; } else { if (dbg_hc(chan)) dev_vdbg(hsotg->dev, "ping, DMA\n"); hctsiz |= TSIZ_DOPNG; } } if (chan->do_split) { if (dbg_hc(chan)) dev_vdbg(hsotg->dev, "split\n"); num_packets = 1; if (chan->complete_split && !chan->ep_is_in) /* * For CSPLIT OUT Transfer, set the size to 0 so the * core doesn't expect any data written to the FIFO */ chan->xfer_len = 0; else if (chan->ep_is_in || chan->xfer_len > chan->max_packet) chan->xfer_len = chan->max_packet; else if (!chan->ep_is_in && chan->xfer_len > 188) chan->xfer_len = 188; hctsiz |= chan->xfer_len << TSIZ_XFERSIZE_SHIFT & TSIZ_XFERSIZE_MASK; } else { if (dbg_hc(chan)) dev_vdbg(hsotg->dev, "no split\n"); /* * Ensure that the transfer length and packet count will fit * in the widths allocated for them in the HCTSIZn register */ if (chan->ep_type == USB_ENDPOINT_XFER_INT || chan->ep_type == USB_ENDPOINT_XFER_ISOC) { /* * Make sure the transfer size is no larger than one * (micro)frame's worth of data. (A check was done * when the periodic transfer was accepted to ensure * that a (micro)frame's worth of data can be * programmed into a channel.) */ u32 max_periodic_len = chan->multi_count * chan->max_packet; if (chan->xfer_len > max_periodic_len) chan->xfer_len = max_periodic_len; } else if (chan->xfer_len > max_hc_xfer_size) { /* * Make sure that xfer_len is a multiple of max packet * size */ chan->xfer_len = max_hc_xfer_size - chan->max_packet + 1; } if (chan->xfer_len > 0) { num_packets = (chan->xfer_len + chan->max_packet - 1) / chan->max_packet; if (num_packets > max_hc_pkt_count) { num_packets = max_hc_pkt_count; chan->xfer_len = num_packets * chan->max_packet; } } else { /* Need 1 packet for transfer length of 0 */ num_packets = 1; } if (chan->ep_is_in) /* * Always program an integral # of max packets for IN * transfers */ chan->xfer_len = num_packets * chan->max_packet; if (chan->ep_type == USB_ENDPOINT_XFER_INT || chan->ep_type == USB_ENDPOINT_XFER_ISOC) /* * Make sure that the multi_count field matches the * actual transfer length */ chan->multi_count = num_packets; if (chan->ep_type == USB_ENDPOINT_XFER_ISOC) dwc2_set_pid_isoc(chan); hctsiz |= chan->xfer_len << TSIZ_XFERSIZE_SHIFT & TSIZ_XFERSIZE_MASK; } chan->start_pkt_count = num_packets; hctsiz |= num_packets << TSIZ_PKTCNT_SHIFT & TSIZ_PKTCNT_MASK; hctsiz |= chan->data_pid_start << TSIZ_SC_MC_PID_SHIFT & TSIZ_SC_MC_PID_MASK; writel(hctsiz, hsotg->regs + HCTSIZ(chan->hc_num)); if (dbg_hc(chan)) { dev_vdbg(hsotg->dev, "Wrote %08x to HCTSIZ(%d)\n", hctsiz, chan->hc_num); dev_vdbg(hsotg->dev, "%s: Channel %d\n", __func__, chan->hc_num); dev_vdbg(hsotg->dev, " Xfer Size: %d\n", (hctsiz & TSIZ_XFERSIZE_MASK) >> TSIZ_XFERSIZE_SHIFT); dev_vdbg(hsotg->dev, " Num Pkts: %d\n", (hctsiz & TSIZ_PKTCNT_MASK) >> TSIZ_PKTCNT_SHIFT); dev_vdbg(hsotg->dev, " Start PID: %d\n", (hctsiz & TSIZ_SC_MC_PID_MASK) >> TSIZ_SC_MC_PID_SHIFT); } if (hsotg->core_params->dma_enable > 0) { dma_addr_t dma_addr; if (chan->align_buf) { if (dbg_hc(chan)) dev_vdbg(hsotg->dev, "align_buf\n"); dma_addr = chan->align_buf; } else { dma_addr = chan->xfer_dma; } writel((u32)dma_addr, hsotg->regs + HCDMA(chan->hc_num)); if (dbg_hc(chan)) dev_vdbg(hsotg->dev, "Wrote %08lx to HCDMA(%d)\n", (unsigned long)dma_addr, chan->hc_num); } /* Start the split */ if (chan->do_split) { u32 hcsplt = readl(hsotg->regs + HCSPLT(chan->hc_num)); hcsplt |= HCSPLT_SPLTENA; writel(hcsplt, hsotg->regs + HCSPLT(chan->hc_num)); } hcchar = readl(hsotg->regs + HCCHAR(chan->hc_num)); hcchar &= ~HCCHAR_MULTICNT_MASK; hcchar |= chan->multi_count << HCCHAR_MULTICNT_SHIFT & HCCHAR_MULTICNT_MASK; dwc2_hc_set_even_odd_frame(hsotg, chan, &hcchar); if (hcchar & HCCHAR_CHDIS) dev_warn(hsotg->dev, "%s: chdis set, channel %d, hcchar 0x%08x\n", __func__, chan->hc_num, hcchar); /* Set host channel enable after all other setup is complete */ hcchar |= HCCHAR_CHENA; hcchar &= ~HCCHAR_CHDIS; if (dbg_hc(chan)) dev_vdbg(hsotg->dev, " Multi Cnt: %d\n", (hcchar & HCCHAR_MULTICNT_MASK) >> HCCHAR_MULTICNT_SHIFT); writel(hcchar, hsotg->regs + HCCHAR(chan->hc_num)); if (dbg_hc(chan)) dev_vdbg(hsotg->dev, "Wrote %08x to HCCHAR(%d)\n", hcchar, chan->hc_num); chan->xfer_started = 1; chan->requests++; if (hsotg->core_params->dma_enable <= 0 && !chan->ep_is_in && chan->xfer_len > 0) /* Load OUT packet into the appropriate Tx FIFO */ dwc2_hc_write_packet(hsotg, chan); } /** * dwc2_hc_start_transfer_ddma() - Does the setup for a data transfer for a * host channel and starts the transfer in Descriptor DMA mode * * @hsotg: Programming view of DWC_otg controller * @chan: Information needed to initialize the host channel * * Initializes HCTSIZ register. For a PING transfer the Do Ping bit is set. * Sets PID and NTD values. For periodic transfers initializes SCHED_INFO field * with micro-frame bitmap. * * Initializes HCDMA register with descriptor list address and CTD value then * starts the transfer via enabling the channel. */ void dwc2_hc_start_transfer_ddma(struct dwc2_hsotg *hsotg, struct dwc2_host_chan *chan) { u32 hcchar; u32 hc_dma; u32 hctsiz = 0; if (chan->do_ping) hctsiz |= TSIZ_DOPNG; if (chan->ep_type == USB_ENDPOINT_XFER_ISOC) dwc2_set_pid_isoc(chan); /* Packet Count and Xfer Size are not used in Descriptor DMA mode */ hctsiz |= chan->data_pid_start << TSIZ_SC_MC_PID_SHIFT & TSIZ_SC_MC_PID_MASK; /* 0 - 1 descriptor, 1 - 2 descriptors, etc */ hctsiz |= (chan->ntd - 1) << TSIZ_NTD_SHIFT & TSIZ_NTD_MASK; /* Non-zero only for high-speed interrupt endpoints */ hctsiz |= chan->schinfo << TSIZ_SCHINFO_SHIFT & TSIZ_SCHINFO_MASK; if (dbg_hc(chan)) { dev_vdbg(hsotg->dev, "%s: Channel %d\n", __func__, chan->hc_num); dev_vdbg(hsotg->dev, " Start PID: %d\n", chan->data_pid_start); dev_vdbg(hsotg->dev, " NTD: %d\n", chan->ntd - 1); } writel(hctsiz, hsotg->regs + HCTSIZ(chan->hc_num)); hc_dma = (u32)chan->desc_list_addr & HCDMA_DMA_ADDR_MASK; /* Always start from first descriptor */ hc_dma &= ~HCDMA_CTD_MASK; writel(hc_dma, hsotg->regs + HCDMA(chan->hc_num)); if (dbg_hc(chan)) dev_vdbg(hsotg->dev, "Wrote %08x to HCDMA(%d)\n", hc_dma, chan->hc_num); hcchar = readl(hsotg->regs + HCCHAR(chan->hc_num)); hcchar &= ~HCCHAR_MULTICNT_MASK; hcchar |= chan->multi_count << HCCHAR_MULTICNT_SHIFT & HCCHAR_MULTICNT_MASK; if (hcchar & HCCHAR_CHDIS) dev_warn(hsotg->dev, "%s: chdis set, channel %d, hcchar 0x%08x\n", __func__, chan->hc_num, hcchar); /* Set host channel enable after all other setup is complete */ hcchar |= HCCHAR_CHENA; hcchar &= ~HCCHAR_CHDIS; if (dbg_hc(chan)) dev_vdbg(hsotg->dev, " Multi Cnt: %d\n", (hcchar & HCCHAR_MULTICNT_MASK) >> HCCHAR_MULTICNT_SHIFT); writel(hcchar, hsotg->regs + HCCHAR(chan->hc_num)); if (dbg_hc(chan)) dev_vdbg(hsotg->dev, "Wrote %08x to HCCHAR(%d)\n", hcchar, chan->hc_num); chan->xfer_started = 1; chan->requests++; } /** * dwc2_hc_continue_transfer() - Continues a data transfer that was started by * a previous call to dwc2_hc_start_transfer() * * @hsotg: Programming view of DWC_otg controller * @chan: Information needed to initialize the host channel * * The caller must ensure there is sufficient space in the request queue and Tx * Data FIFO. This function should only be called in Slave mode. In DMA mode, * the controller acts autonomously to complete transfers programmed to a host * channel. * * For an OUT transfer, a new data packet is loaded into the appropriate FIFO * if there is any data remaining to be queued. For an IN transfer, another * data packet is always requested. For the SETUP phase of a control transfer, * this function does nothing. * * Return: 1 if a new request is queued, 0 if no more requests are required * for this transfer */ int dwc2_hc_continue_transfer(struct dwc2_hsotg *hsotg, struct dwc2_host_chan *chan) { if (dbg_hc(chan)) dev_vdbg(hsotg->dev, "%s: Channel %d\n", __func__, chan->hc_num); if (chan->do_split) /* SPLITs always queue just once per channel */ return 0; if (chan->data_pid_start == DWC2_HC_PID_SETUP) /* SETUPs are queued only once since they can't be NAK'd */ return 0; if (chan->ep_is_in) { /* * Always queue another request for other IN transfers. If * back-to-back INs are issued and NAKs are received for both, * the driver may still be processing the first NAK when the * second NAK is received. When the interrupt handler clears * the NAK interrupt for the first NAK, the second NAK will * not be seen. So we can't depend on the NAK interrupt * handler to requeue a NAK'd request. Instead, IN requests * are issued each time this function is called. When the * transfer completes, the extra requests for the channel will * be flushed. */ u32 hcchar = readl(hsotg->regs + HCCHAR(chan->hc_num)); dwc2_hc_set_even_odd_frame(hsotg, chan, &hcchar); hcchar |= HCCHAR_CHENA; hcchar &= ~HCCHAR_CHDIS; if (dbg_hc(chan)) dev_vdbg(hsotg->dev, " IN xfer: hcchar = 0x%08x\n", hcchar); writel(hcchar, hsotg->regs + HCCHAR(chan->hc_num)); chan->requests++; return 1; } /* OUT transfers */ if (chan->xfer_count < chan->xfer_len) { if (chan->ep_type == USB_ENDPOINT_XFER_INT || chan->ep_type == USB_ENDPOINT_XFER_ISOC) { u32 hcchar = readl(hsotg->regs + HCCHAR(chan->hc_num)); dwc2_hc_set_even_odd_frame(hsotg, chan, &hcchar); } /* Load OUT packet into the appropriate Tx FIFO */ dwc2_hc_write_packet(hsotg, chan); chan->requests++; return 1; } return 0; } /** * dwc2_hc_do_ping() - Starts a PING transfer * * @hsotg: Programming view of DWC_otg controller * @chan: Information needed to initialize the host channel * * This function should only be called in Slave mode. The Do Ping bit is set in * the HCTSIZ register, then the channel is enabled. */ void dwc2_hc_do_ping(struct dwc2_hsotg *hsotg, struct dwc2_host_chan *chan) { u32 hcchar; u32 hctsiz; if (dbg_hc(chan)) dev_vdbg(hsotg->dev, "%s: Channel %d\n", __func__, chan->hc_num); hctsiz = TSIZ_DOPNG; hctsiz |= 1 << TSIZ_PKTCNT_SHIFT; writel(hctsiz, hsotg->regs + HCTSIZ(chan->hc_num)); hcchar = readl(hsotg->regs + HCCHAR(chan->hc_num)); hcchar |= HCCHAR_CHENA; hcchar &= ~HCCHAR_CHDIS; writel(hcchar, hsotg->regs + HCCHAR(chan->hc_num)); } /** * dwc2_calc_frame_interval() - Calculates the correct frame Interval value for * the HFIR register according to PHY type and speed * * @hsotg: Programming view of DWC_otg controller * * NOTE: The caller can modify the value of the HFIR register only after the * Port Enable bit of the Host Port Control and Status register (HPRT.EnaPort) * has been set */ u32 dwc2_calc_frame_interval(struct dwc2_hsotg *hsotg) { u32 usbcfg; u32 hprt0; int clock = 60; /* default value */ usbcfg = readl(hsotg->regs + GUSBCFG); hprt0 = readl(hsotg->regs + HPRT0); if (!(usbcfg & GUSBCFG_PHYSEL) && (usbcfg & GUSBCFG_ULPI_UTMI_SEL) && !(usbcfg & GUSBCFG_PHYIF16)) clock = 60; if ((usbcfg & GUSBCFG_PHYSEL) && hsotg->hw_params.fs_phy_type == GHWCFG2_FS_PHY_TYPE_SHARED_ULPI) clock = 48; if (!(usbcfg & GUSBCFG_PHY_LP_CLK_SEL) && !(usbcfg & GUSBCFG_PHYSEL) && !(usbcfg & GUSBCFG_ULPI_UTMI_SEL) && (usbcfg & GUSBCFG_PHYIF16)) clock = 30; if (!(usbcfg & GUSBCFG_PHY_LP_CLK_SEL) && !(usbcfg & GUSBCFG_PHYSEL) && !(usbcfg & GUSBCFG_ULPI_UTMI_SEL) && !(usbcfg & GUSBCFG_PHYIF16)) clock = 60; if ((usbcfg & GUSBCFG_PHY_LP_CLK_SEL) && !(usbcfg & GUSBCFG_PHYSEL) && !(usbcfg & GUSBCFG_ULPI_UTMI_SEL) && (usbcfg & GUSBCFG_PHYIF16)) clock = 48; if ((usbcfg & GUSBCFG_PHYSEL) && !(usbcfg & GUSBCFG_PHYIF16) && hsotg->hw_params.fs_phy_type == GHWCFG2_FS_PHY_TYPE_SHARED_UTMI) clock = 48; if ((usbcfg & GUSBCFG_PHYSEL) && hsotg->hw_params.fs_phy_type == GHWCFG2_FS_PHY_TYPE_DEDICATED) clock = 48; if ((hprt0 & HPRT0_SPD_MASK) >> HPRT0_SPD_SHIFT == HPRT0_SPD_HIGH_SPEED) /* High speed case */ return 125 * clock; else /* FS/LS case */ return 1000 * clock; } /** * dwc2_read_packet() - Reads a packet from the Rx FIFO into the destination * buffer * * @core_if: Programming view of DWC_otg controller * @dest: Destination buffer for the packet * @bytes: Number of bytes to copy to the destination */ void dwc2_read_packet(struct dwc2_hsotg *hsotg, u8 *dest, u16 bytes) { u32 __iomem *fifo = hsotg->regs + HCFIFO(0); u32 *data_buf = (u32 *)dest; int word_count = (bytes + 3) / 4; int i; /* * Todo: Account for the case where dest is not dword aligned. This * requires reading data from the FIFO into a u32 temp buffer, then * moving it into the data buffer. */ dev_vdbg(hsotg->dev, "%s(%p,%p,%d)\n", __func__, hsotg, dest, bytes); for (i = 0; i < word_count; i++, data_buf++) *data_buf = readl(fifo); } /** * dwc2_dump_host_registers() - Prints the host registers * * @hsotg: Programming view of DWC_otg controller * * NOTE: This function will be removed once the peripheral controller code * is integrated and the driver is stable */ void dwc2_dump_host_registers(struct dwc2_hsotg *hsotg) { #ifdef DEBUG u32 __iomem *addr; int i; dev_dbg(hsotg->dev, "Host Global Registers\n"); addr = hsotg->regs + HCFG; dev_dbg(hsotg->dev, "HCFG @0x%08lX : 0x%08X\n", (unsigned long)addr, readl(addr)); addr = hsotg->regs + HFIR; dev_dbg(hsotg->dev, "HFIR @0x%08lX : 0x%08X\n", (unsigned long)addr, readl(addr)); addr = hsotg->regs + HFNUM; dev_dbg(hsotg->dev, "HFNUM @0x%08lX : 0x%08X\n", (unsigned long)addr, readl(addr)); addr = hsotg->regs + HPTXSTS; dev_dbg(hsotg->dev, "HPTXSTS @0x%08lX : 0x%08X\n", (unsigned long)addr, readl(addr)); addr = hsotg->regs + HAINT; dev_dbg(hsotg->dev, "HAINT @0x%08lX : 0x%08X\n", (unsigned long)addr, readl(addr)); addr = hsotg->regs + HAINTMSK; dev_dbg(hsotg->dev, "HAINTMSK @0x%08lX : 0x%08X\n", (unsigned long)addr, readl(addr)); if (hsotg->core_params->dma_desc_enable > 0) { addr = hsotg->regs + HFLBADDR; dev_dbg(hsotg->dev, "HFLBADDR @0x%08lX : 0x%08X\n", (unsigned long)addr, readl(addr)); } addr = hsotg->regs + HPRT0; dev_dbg(hsotg->dev, "HPRT0 @0x%08lX : 0x%08X\n", (unsigned long)addr, readl(addr)); for (i = 0; i < hsotg->core_params->host_channels; i++) { dev_dbg(hsotg->dev, "Host Channel %d Specific Registers\n", i); addr = hsotg->regs + HCCHAR(i); dev_dbg(hsotg->dev, "HCCHAR @0x%08lX : 0x%08X\n", (unsigned long)addr, readl(addr)); addr = hsotg->regs + HCSPLT(i); dev_dbg(hsotg->dev, "HCSPLT @0x%08lX : 0x%08X\n", (unsigned long)addr, readl(addr)); addr = hsotg->regs + HCINT(i); dev_dbg(hsotg->dev, "HCINT @0x%08lX : 0x%08X\n", (unsigned long)addr, readl(addr)); addr = hsotg->regs + HCINTMSK(i); dev_dbg(hsotg->dev, "HCINTMSK @0x%08lX : 0x%08X\n", (unsigned long)addr, readl(addr)); addr = hsotg->regs + HCTSIZ(i); dev_dbg(hsotg->dev, "HCTSIZ @0x%08lX : 0x%08X\n", (unsigned long)addr, readl(addr)); addr = hsotg->regs + HCDMA(i); dev_dbg(hsotg->dev, "HCDMA @0x%08lX : 0x%08X\n", (unsigned long)addr, readl(addr)); if (hsotg->core_params->dma_desc_enable > 0) { addr = hsotg->regs + HCDMAB(i); dev_dbg(hsotg->dev, "HCDMAB @0x%08lX : 0x%08X\n", (unsigned long)addr, readl(addr)); } } #endif } /** * dwc2_dump_global_registers() - Prints the core global registers * * @hsotg: Programming view of DWC_otg controller * * NOTE: This function will be removed once the peripheral controller code * is integrated and the driver is stable */ void dwc2_dump_global_registers(struct dwc2_hsotg *hsotg) { #ifdef DEBUG u32 __iomem *addr; dev_dbg(hsotg->dev, "Core Global Registers\n"); addr = hsotg->regs + GOTGCTL; dev_dbg(hsotg->dev, "GOTGCTL @0x%08lX : 0x%08X\n", (unsigned long)addr, readl(addr)); addr = hsotg->regs + GOTGINT; dev_dbg(hsotg->dev, "GOTGINT @0x%08lX : 0x%08X\n", (unsigned long)addr, readl(addr)); addr = hsotg->regs + GAHBCFG; dev_dbg(hsotg->dev, "GAHBCFG @0x%08lX : 0x%08X\n", (unsigned long)addr, readl(addr)); addr = hsotg->regs + GUSBCFG; dev_dbg(hsotg->dev, "GUSBCFG @0x%08lX : 0x%08X\n", (unsigned long)addr, readl(addr)); addr = hsotg->regs + GRSTCTL; dev_dbg(hsotg->dev, "GRSTCTL @0x%08lX : 0x%08X\n", (unsigned long)addr, readl(addr)); addr = hsotg->regs + GINTSTS; dev_dbg(hsotg->dev, "GINTSTS @0x%08lX : 0x%08X\n", (unsigned long)addr, readl(addr)); addr = hsotg->regs + GINTMSK; dev_dbg(hsotg->dev, "GINTMSK @0x%08lX : 0x%08X\n", (unsigned long)addr, readl(addr)); addr = hsotg->regs + GRXSTSR; dev_dbg(hsotg->dev, "GRXSTSR @0x%08lX : 0x%08X\n", (unsigned long)addr, readl(addr)); addr = hsotg->regs + GRXFSIZ; dev_dbg(hsotg->dev, "GRXFSIZ @0x%08lX : 0x%08X\n", (unsigned long)addr, readl(addr)); addr = hsotg->regs + GNPTXFSIZ; dev_dbg(hsotg->dev, "GNPTXFSIZ @0x%08lX : 0x%08X\n", (unsigned long)addr, readl(addr)); addr = hsotg->regs + GNPTXSTS; dev_dbg(hsotg->dev, "GNPTXSTS @0x%08lX : 0x%08X\n", (unsigned long)addr, readl(addr)); addr = hsotg->regs + GI2CCTL; dev_dbg(hsotg->dev, "GI2CCTL @0x%08lX : 0x%08X\n", (unsigned long)addr, readl(addr)); addr = hsotg->regs + GPVNDCTL; dev_dbg(hsotg->dev, "GPVNDCTL @0x%08lX : 0x%08X\n", (unsigned long)addr, readl(addr)); addr = hsotg->regs + GGPIO; dev_dbg(hsotg->dev, "GGPIO @0x%08lX : 0x%08X\n", (unsigned long)addr, readl(addr)); addr = hsotg->regs + GUID; dev_dbg(hsotg->dev, "GUID @0x%08lX : 0x%08X\n", (unsigned long)addr, readl(addr)); addr = hsotg->regs + GSNPSID; dev_dbg(hsotg->dev, "GSNPSID @0x%08lX : 0x%08X\n", (unsigned long)addr, readl(addr)); addr = hsotg->regs + GHWCFG1; dev_dbg(hsotg->dev, "GHWCFG1 @0x%08lX : 0x%08X\n", (unsigned long)addr, readl(addr)); addr = hsotg->regs + GHWCFG2; dev_dbg(hsotg->dev, "GHWCFG2 @0x%08lX : 0x%08X\n", (unsigned long)addr, readl(addr)); addr = hsotg->regs + GHWCFG3; dev_dbg(hsotg->dev, "GHWCFG3 @0x%08lX : 0x%08X\n", (unsigned long)addr, readl(addr)); addr = hsotg->regs + GHWCFG4; dev_dbg(hsotg->dev, "GHWCFG4 @0x%08lX : 0x%08X\n", (unsigned long)addr, readl(addr)); addr = hsotg->regs + GLPMCFG; dev_dbg(hsotg->dev, "GLPMCFG @0x%08lX : 0x%08X\n", (unsigned long)addr, readl(addr)); addr = hsotg->regs + GPWRDN; dev_dbg(hsotg->dev, "GPWRDN @0x%08lX : 0x%08X\n", (unsigned long)addr, readl(addr)); addr = hsotg->regs + GDFIFOCFG; dev_dbg(hsotg->dev, "GDFIFOCFG @0x%08lX : 0x%08X\n", (unsigned long)addr, readl(addr)); addr = hsotg->regs + HPTXFSIZ; dev_dbg(hsotg->dev, "HPTXFSIZ @0x%08lX : 0x%08X\n", (unsigned long)addr, readl(addr)); addr = hsotg->regs + PCGCTL; dev_dbg(hsotg->dev, "PCGCTL @0x%08lX : 0x%08X\n", (unsigned long)addr, readl(addr)); #endif } /** * dwc2_flush_tx_fifo() - Flushes a Tx FIFO * * @hsotg: Programming view of DWC_otg controller * @num: Tx FIFO to flush */ void dwc2_flush_tx_fifo(struct dwc2_hsotg *hsotg, const int num) { u32 greset; int count = 0; dev_vdbg(hsotg->dev, "Flush Tx FIFO %d\n", num); greset = GRSTCTL_TXFFLSH; greset |= num << GRSTCTL_TXFNUM_SHIFT & GRSTCTL_TXFNUM_MASK; writel(greset, hsotg->regs + GRSTCTL); do { greset = readl(hsotg->regs + GRSTCTL); if (++count > 10000) { dev_warn(hsotg->dev, "%s() HANG! GRSTCTL=%0x GNPTXSTS=0x%08x\n", __func__, greset, readl(hsotg->regs + GNPTXSTS)); break; } udelay(1); } while (greset & GRSTCTL_TXFFLSH); /* Wait for at least 3 PHY Clocks */ udelay(1); } /** * dwc2_flush_rx_fifo() - Flushes the Rx FIFO * * @hsotg: Programming view of DWC_otg controller */ void dwc2_flush_rx_fifo(struct dwc2_hsotg *hsotg) { u32 greset; int count = 0; dev_vdbg(hsotg->dev, "%s()\n", __func__); greset = GRSTCTL_RXFFLSH; writel(greset, hsotg->regs + GRSTCTL); do { greset = readl(hsotg->regs + GRSTCTL); if (++count > 10000) { dev_warn(hsotg->dev, "%s() HANG! GRSTCTL=%0x\n", __func__, greset); break; } udelay(1); } while (greset & GRSTCTL_RXFFLSH); /* Wait for at least 3 PHY Clocks */ udelay(1); } #define DWC2_OUT_OF_BOUNDS(a, b, c) ((a) < (b) || (a) > (c)) /* Parameter access functions */ void dwc2_set_param_otg_cap(struct dwc2_hsotg *hsotg, int val) { int valid = 1; switch (val) { case DWC2_CAP_PARAM_HNP_SRP_CAPABLE: if (hsotg->hw_params.op_mode != GHWCFG2_OP_MODE_HNP_SRP_CAPABLE) valid = 0; break; case DWC2_CAP_PARAM_SRP_ONLY_CAPABLE: switch (hsotg->hw_params.op_mode) { case GHWCFG2_OP_MODE_HNP_SRP_CAPABLE: case GHWCFG2_OP_MODE_SRP_ONLY_CAPABLE: case GHWCFG2_OP_MODE_SRP_CAPABLE_DEVICE: case GHWCFG2_OP_MODE_SRP_CAPABLE_HOST: break; default: valid = 0; break; } break; case DWC2_CAP_PARAM_NO_HNP_SRP_CAPABLE: /* always valid */ break; default: valid = 0; break; } if (!valid) { if (val >= 0) dev_err(hsotg->dev, "%d invalid for otg_cap parameter. Check HW configuration.\n", val); switch (hsotg->hw_params.op_mode) { case GHWCFG2_OP_MODE_HNP_SRP_CAPABLE: val = DWC2_CAP_PARAM_HNP_SRP_CAPABLE; break; case GHWCFG2_OP_MODE_SRP_ONLY_CAPABLE: case GHWCFG2_OP_MODE_SRP_CAPABLE_DEVICE: case GHWCFG2_OP_MODE_SRP_CAPABLE_HOST: val = DWC2_CAP_PARAM_SRP_ONLY_CAPABLE; break; default: val = DWC2_CAP_PARAM_NO_HNP_SRP_CAPABLE; break; } dev_dbg(hsotg->dev, "Setting otg_cap to %d\n", val); } hsotg->core_params->otg_cap = val; } void dwc2_set_param_dma_enable(struct dwc2_hsotg *hsotg, int val) { int valid = 1; if (val > 0 && hsotg->hw_params.arch == GHWCFG2_SLAVE_ONLY_ARCH) valid = 0; if (val < 0) valid = 0; if (!valid) { if (val >= 0) dev_err(hsotg->dev, "%d invalid for dma_enable parameter. Check HW configuration.\n", val); val = hsotg->hw_params.arch != GHWCFG2_SLAVE_ONLY_ARCH; dev_dbg(hsotg->dev, "Setting dma_enable to %d\n", val); } hsotg->core_params->dma_enable = val; } void dwc2_set_param_dma_desc_enable(struct dwc2_hsotg *hsotg, int val) { int valid = 1; if (val > 0 && (hsotg->core_params->dma_enable <= 0 || !hsotg->hw_params.dma_desc_enable)) valid = 0; if (val < 0) valid = 0; if (!valid) { if (val >= 0) dev_err(hsotg->dev, "%d invalid for dma_desc_enable parameter. Check HW configuration.\n", val); val = (hsotg->core_params->dma_enable > 0 && hsotg->hw_params.dma_desc_enable); dev_dbg(hsotg->dev, "Setting dma_desc_enable to %d\n", val); } hsotg->core_params->dma_desc_enable = val; } void dwc2_set_param_host_support_fs_ls_low_power(struct dwc2_hsotg *hsotg, int val) { if (DWC2_OUT_OF_BOUNDS(val, 0, 1)) { if (val >= 0) { dev_err(hsotg->dev, "Wrong value for host_support_fs_low_power\n"); dev_err(hsotg->dev, "host_support_fs_low_power must be 0 or 1\n"); } val = 0; dev_dbg(hsotg->dev, "Setting host_support_fs_low_power to %d\n", val); } hsotg->core_params->host_support_fs_ls_low_power = val; } void dwc2_set_param_enable_dynamic_fifo(struct dwc2_hsotg *hsotg, int val) { int valid = 1; if (val > 0 && !hsotg->hw_params.enable_dynamic_fifo) valid = 0; if (val < 0) valid = 0; if (!valid) { if (val >= 0) dev_err(hsotg->dev, "%d invalid for enable_dynamic_fifo parameter. Check HW configuration.\n", val); val = hsotg->hw_params.enable_dynamic_fifo; dev_dbg(hsotg->dev, "Setting enable_dynamic_fifo to %d\n", val); } hsotg->core_params->enable_dynamic_fifo = val; } void dwc2_set_param_host_rx_fifo_size(struct dwc2_hsotg *hsotg, int val) { int valid = 1; if (val < 16 || val > hsotg->hw_params.host_rx_fifo_size) valid = 0; if (!valid) { if (val >= 0) dev_err(hsotg->dev, "%d invalid for host_rx_fifo_size. Check HW configuration.\n", val); val = hsotg->hw_params.host_rx_fifo_size; dev_dbg(hsotg->dev, "Setting host_rx_fifo_size to %d\n", val); } hsotg->core_params->host_rx_fifo_size = val; } void dwc2_set_param_host_nperio_tx_fifo_size(struct dwc2_hsotg *hsotg, int val) { int valid = 1; if (val < 16 || val > hsotg->hw_params.host_nperio_tx_fifo_size) valid = 0; if (!valid) { if (val >= 0) dev_err(hsotg->dev, "%d invalid for host_nperio_tx_fifo_size. Check HW configuration.\n", val); val = hsotg->hw_params.host_nperio_tx_fifo_size; dev_dbg(hsotg->dev, "Setting host_nperio_tx_fifo_size to %d\n", val); } hsotg->core_params->host_nperio_tx_fifo_size = val; } void dwc2_set_param_host_perio_tx_fifo_size(struct dwc2_hsotg *hsotg, int val) { int valid = 1; if (val < 16 || val > hsotg->hw_params.host_perio_tx_fifo_size) valid = 0; if (!valid) { if (val >= 0) dev_err(hsotg->dev, "%d invalid for host_perio_tx_fifo_size. Check HW configuration.\n", val); val = hsotg->hw_params.host_perio_tx_fifo_size; dev_dbg(hsotg->dev, "Setting host_perio_tx_fifo_size to %d\n", val); } hsotg->core_params->host_perio_tx_fifo_size = val; } void dwc2_set_param_max_transfer_size(struct dwc2_hsotg *hsotg, int val) { int valid = 1; if (val < 2047 || val > hsotg->hw_params.max_transfer_size) valid = 0; if (!valid) { if (val >= 0) dev_err(hsotg->dev, "%d invalid for max_transfer_size. Check HW configuration.\n", val); val = hsotg->hw_params.max_transfer_size; dev_dbg(hsotg->dev, "Setting max_transfer_size to %d\n", val); } hsotg->core_params->max_transfer_size = val; } void dwc2_set_param_max_packet_count(struct dwc2_hsotg *hsotg, int val) { int valid = 1; if (val < 15 || val > hsotg->hw_params.max_packet_count) valid = 0; if (!valid) { if (val >= 0) dev_err(hsotg->dev, "%d invalid for max_packet_count. Check HW configuration.\n", val); val = hsotg->hw_params.max_packet_count; dev_dbg(hsotg->dev, "Setting max_packet_count to %d\n", val); } hsotg->core_params->max_packet_count = val; } void dwc2_set_param_host_channels(struct dwc2_hsotg *hsotg, int val) { int valid = 1; if (val < 1 || val > hsotg->hw_params.host_channels) valid = 0; if (!valid) { if (val >= 0) dev_err(hsotg->dev, "%d invalid for host_channels. Check HW configuration.\n", val); val = hsotg->hw_params.host_channels; dev_dbg(hsotg->dev, "Setting host_channels to %d\n", val); } hsotg->core_params->host_channels = val; } void dwc2_set_param_phy_type(struct dwc2_hsotg *hsotg, int val) { int valid = 0; u32 hs_phy_type, fs_phy_type; if (DWC2_OUT_OF_BOUNDS(val, DWC2_PHY_TYPE_PARAM_FS, DWC2_PHY_TYPE_PARAM_ULPI)) { if (val >= 0) { dev_err(hsotg->dev, "Wrong value for phy_type\n"); dev_err(hsotg->dev, "phy_type must be 0, 1 or 2\n"); } valid = 0; } hs_phy_type = hsotg->hw_params.hs_phy_type; fs_phy_type = hsotg->hw_params.fs_phy_type; if (val == DWC2_PHY_TYPE_PARAM_UTMI && (hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI || hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI_ULPI)) valid = 1; else if (val == DWC2_PHY_TYPE_PARAM_ULPI && (hs_phy_type == GHWCFG2_HS_PHY_TYPE_ULPI || hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI_ULPI)) valid = 1; else if (val == DWC2_PHY_TYPE_PARAM_FS && fs_phy_type == GHWCFG2_FS_PHY_TYPE_DEDICATED) valid = 1; if (!valid) { if (val >= 0) dev_err(hsotg->dev, "%d invalid for phy_type. Check HW configuration.\n", val); val = DWC2_PHY_TYPE_PARAM_FS; if (hs_phy_type != GHWCFG2_HS_PHY_TYPE_NOT_SUPPORTED) { if (hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI || hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI_ULPI) val = DWC2_PHY_TYPE_PARAM_UTMI; else val = DWC2_PHY_TYPE_PARAM_ULPI; } dev_dbg(hsotg->dev, "Setting phy_type to %d\n", val); } hsotg->core_params->phy_type = val; } static int dwc2_get_param_phy_type(struct dwc2_hsotg *hsotg) { return hsotg->core_params->phy_type; } void dwc2_set_param_speed(struct dwc2_hsotg *hsotg, int val) { int valid = 1; if (DWC2_OUT_OF_BOUNDS(val, 0, 1)) { if (val >= 0) { dev_err(hsotg->dev, "Wrong value for speed parameter\n"); dev_err(hsotg->dev, "max_speed parameter must be 0 or 1\n"); } valid = 0; } if (val == DWC2_SPEED_PARAM_HIGH && dwc2_get_param_phy_type(hsotg) == DWC2_PHY_TYPE_PARAM_FS) valid = 0; if (!valid) { if (val >= 0) dev_err(hsotg->dev, "%d invalid for speed parameter. Check HW configuration.\n", val); val = dwc2_get_param_phy_type(hsotg) == DWC2_PHY_TYPE_PARAM_FS ? DWC2_SPEED_PARAM_FULL : DWC2_SPEED_PARAM_HIGH; dev_dbg(hsotg->dev, "Setting speed to %d\n", val); } hsotg->core_params->speed = val; } void dwc2_set_param_host_ls_low_power_phy_clk(struct dwc2_hsotg *hsotg, int val) { int valid = 1; if (DWC2_OUT_OF_BOUNDS(val, DWC2_HOST_LS_LOW_POWER_PHY_CLK_PARAM_48MHZ, DWC2_HOST_LS_LOW_POWER_PHY_CLK_PARAM_6MHZ)) { if (val >= 0) { dev_err(hsotg->dev, "Wrong value for host_ls_low_power_phy_clk parameter\n"); dev_err(hsotg->dev, "host_ls_low_power_phy_clk must be 0 or 1\n"); } valid = 0; } if (val == DWC2_HOST_LS_LOW_POWER_PHY_CLK_PARAM_48MHZ && dwc2_get_param_phy_type(hsotg) == DWC2_PHY_TYPE_PARAM_FS) valid = 0; if (!valid) { if (val >= 0) dev_err(hsotg->dev, "%d invalid for host_ls_low_power_phy_clk. Check HW configuration.\n", val); val = dwc2_get_param_phy_type(hsotg) == DWC2_PHY_TYPE_PARAM_FS ? DWC2_HOST_LS_LOW_POWER_PHY_CLK_PARAM_6MHZ : DWC2_HOST_LS_LOW_POWER_PHY_CLK_PARAM_48MHZ; dev_dbg(hsotg->dev, "Setting host_ls_low_power_phy_clk to %d\n", val); } hsotg->core_params->host_ls_low_power_phy_clk = val; } void dwc2_set_param_phy_ulpi_ddr(struct dwc2_hsotg *hsotg, int val) { if (DWC2_OUT_OF_BOUNDS(val, 0, 1)) { if (val >= 0) { dev_err(hsotg->dev, "Wrong value for phy_ulpi_ddr\n"); dev_err(hsotg->dev, "phy_upli_ddr must be 0 or 1\n"); } val = 0; dev_dbg(hsotg->dev, "Setting phy_upli_ddr to %d\n", val); } hsotg->core_params->phy_ulpi_ddr = val; } void dwc2_set_param_phy_ulpi_ext_vbus(struct dwc2_hsotg *hsotg, int val) { if (DWC2_OUT_OF_BOUNDS(val, 0, 1)) { if (val >= 0) { dev_err(hsotg->dev, "Wrong value for phy_ulpi_ext_vbus\n"); dev_err(hsotg->dev, "phy_ulpi_ext_vbus must be 0 or 1\n"); } val = 0; dev_dbg(hsotg->dev, "Setting phy_ulpi_ext_vbus to %d\n", val); } hsotg->core_params->phy_ulpi_ext_vbus = val; } void dwc2_set_param_phy_utmi_width(struct dwc2_hsotg *hsotg, int val) { int valid = 0; switch (hsotg->hw_params.utmi_phy_data_width) { case GHWCFG4_UTMI_PHY_DATA_WIDTH_8: valid = (val == 8); break; case GHWCFG4_UTMI_PHY_DATA_WIDTH_16: valid = (val == 16); break; case GHWCFG4_UTMI_PHY_DATA_WIDTH_8_OR_16: valid = (val == 8 || val == 16); break; } if (!valid) { if (val >= 0) { dev_err(hsotg->dev, "%d invalid for phy_utmi_width. Check HW configuration.\n", val); } val = (hsotg->hw_params.utmi_phy_data_width == GHWCFG4_UTMI_PHY_DATA_WIDTH_8) ? 8 : 16; dev_dbg(hsotg->dev, "Setting phy_utmi_width to %d\n", val); } hsotg->core_params->phy_utmi_width = val; } void dwc2_set_param_ulpi_fs_ls(struct dwc2_hsotg *hsotg, int val) { if (DWC2_OUT_OF_BOUNDS(val, 0, 1)) { if (val >= 0) { dev_err(hsotg->dev, "Wrong value for ulpi_fs_ls\n"); dev_err(hsotg->dev, "ulpi_fs_ls must be 0 or 1\n"); } val = 0; dev_dbg(hsotg->dev, "Setting ulpi_fs_ls to %d\n", val); } hsotg->core_params->ulpi_fs_ls = val; } void dwc2_set_param_ts_dline(struct dwc2_hsotg *hsotg, int val) { if (DWC2_OUT_OF_BOUNDS(val, 0, 1)) { if (val >= 0) { dev_err(hsotg->dev, "Wrong value for ts_dline\n"); dev_err(hsotg->dev, "ts_dline must be 0 or 1\n"); } val = 0; dev_dbg(hsotg->dev, "Setting ts_dline to %d\n", val); } hsotg->core_params->ts_dline = val; } void dwc2_set_param_i2c_enable(struct dwc2_hsotg *hsotg, int val) { int valid = 1; if (DWC2_OUT_OF_BOUNDS(val, 0, 1)) { if (val >= 0) { dev_err(hsotg->dev, "Wrong value for i2c_enable\n"); dev_err(hsotg->dev, "i2c_enable must be 0 or 1\n"); } valid = 0; } if (val == 1 && !(hsotg->hw_params.i2c_enable)) valid = 0; if (!valid) { if (val >= 0) dev_err(hsotg->dev, "%d invalid for i2c_enable. Check HW configuration.\n", val); val = hsotg->hw_params.i2c_enable; dev_dbg(hsotg->dev, "Setting i2c_enable to %d\n", val); } hsotg->core_params->i2c_enable = val; } void dwc2_set_param_en_multiple_tx_fifo(struct dwc2_hsotg *hsotg, int val) { int valid = 1; if (DWC2_OUT_OF_BOUNDS(val, 0, 1)) { if (val >= 0) { dev_err(hsotg->dev, "Wrong value for en_multiple_tx_fifo,\n"); dev_err(hsotg->dev, "en_multiple_tx_fifo must be 0 or 1\n"); } valid = 0; } if (val == 1 && !hsotg->hw_params.en_multiple_tx_fifo) valid = 0; if (!valid) { if (val >= 0) dev_err(hsotg->dev, "%d invalid for parameter en_multiple_tx_fifo. Check HW configuration.\n", val); val = hsotg->hw_params.en_multiple_tx_fifo; dev_dbg(hsotg->dev, "Setting en_multiple_tx_fifo to %d\n", val); } hsotg->core_params->en_multiple_tx_fifo = val; } void dwc2_set_param_reload_ctl(struct dwc2_hsotg *hsotg, int val) { int valid = 1; if (DWC2_OUT_OF_BOUNDS(val, 0, 1)) { if (val >= 0) { dev_err(hsotg->dev, "'%d' invalid for parameter reload_ctl\n", val); dev_err(hsotg->dev, "reload_ctl must be 0 or 1\n"); } valid = 0; } if (val == 1 && hsotg->hw_params.snpsid < DWC2_CORE_REV_2_92a) valid = 0; if (!valid) { if (val >= 0) dev_err(hsotg->dev, "%d invalid for parameter reload_ctl. Check HW configuration.\n", val); val = hsotg->hw_params.snpsid >= DWC2_CORE_REV_2_92a; dev_dbg(hsotg->dev, "Setting reload_ctl to %d\n", val); } hsotg->core_params->reload_ctl = val; } void dwc2_set_param_ahbcfg(struct dwc2_hsotg *hsotg, int val) { if (val != -1) hsotg->core_params->ahbcfg = val; else hsotg->core_params->ahbcfg = GAHBCFG_HBSTLEN_INCR4 << GAHBCFG_HBSTLEN_SHIFT; } void dwc2_set_param_otg_ver(struct dwc2_hsotg *hsotg, int val) { if (DWC2_OUT_OF_BOUNDS(val, 0, 1)) { if (val >= 0) { dev_err(hsotg->dev, "'%d' invalid for parameter otg_ver\n", val); dev_err(hsotg->dev, "otg_ver must be 0 (for OTG 1.3 support) or 1 (for OTG 2.0 support)\n"); } val = 0; dev_dbg(hsotg->dev, "Setting otg_ver to %d\n", val); } hsotg->core_params->otg_ver = val; } static void dwc2_set_param_uframe_sched(struct dwc2_hsotg *hsotg, int val) { if (DWC2_OUT_OF_BOUNDS(val, 0, 1)) { if (val >= 0) { dev_err(hsotg->dev, "'%d' invalid for parameter uframe_sched\n", val); dev_err(hsotg->dev, "uframe_sched must be 0 or 1\n"); } val = 1; dev_dbg(hsotg->dev, "Setting uframe_sched to %d\n", val); } hsotg->core_params->uframe_sched = val; } static void dwc2_set_param_external_id_pin_ctl(struct dwc2_hsotg *hsotg, int val) { if (DWC2_OUT_OF_BOUNDS(val, 0, 1)) { if (val >= 0) { dev_err(hsotg->dev, "'%d' invalid for parameter external_id_pin_ctl\n", val); dev_err(hsotg->dev, "external_id_pin_ctl must be 0 or 1\n"); } val = 0; dev_dbg(hsotg->dev, "Setting external_id_pin_ctl to %d\n", val); } hsotg->core_params->external_id_pin_ctl = val; } /* * This function is called during module intialization to pass module parameters * for the DWC_otg core. */ void dwc2_set_parameters(struct dwc2_hsotg *hsotg, const struct dwc2_core_params *params) { dev_dbg(hsotg->dev, "%s()\n", __func__); dwc2_set_param_otg_cap(hsotg, params->otg_cap); dwc2_set_param_dma_enable(hsotg, params->dma_enable); dwc2_set_param_dma_desc_enable(hsotg, params->dma_desc_enable); dwc2_set_param_host_support_fs_ls_low_power(hsotg, params->host_support_fs_ls_low_power); dwc2_set_param_enable_dynamic_fifo(hsotg, params->enable_dynamic_fifo); dwc2_set_param_host_rx_fifo_size(hsotg, params->host_rx_fifo_size); dwc2_set_param_host_nperio_tx_fifo_size(hsotg, params->host_nperio_tx_fifo_size); dwc2_set_param_host_perio_tx_fifo_size(hsotg, params->host_perio_tx_fifo_size); dwc2_set_param_max_transfer_size(hsotg, params->max_transfer_size); dwc2_set_param_max_packet_count(hsotg, params->max_packet_count); dwc2_set_param_host_channels(hsotg, params->host_channels); dwc2_set_param_phy_type(hsotg, params->phy_type); dwc2_set_param_speed(hsotg, params->speed); dwc2_set_param_host_ls_low_power_phy_clk(hsotg, params->host_ls_low_power_phy_clk); dwc2_set_param_phy_ulpi_ddr(hsotg, params->phy_ulpi_ddr); dwc2_set_param_phy_ulpi_ext_vbus(hsotg, params->phy_ulpi_ext_vbus); dwc2_set_param_phy_utmi_width(hsotg, params->phy_utmi_width); dwc2_set_param_ulpi_fs_ls(hsotg, params->ulpi_fs_ls); dwc2_set_param_ts_dline(hsotg, params->ts_dline); dwc2_set_param_i2c_enable(hsotg, params->i2c_enable); dwc2_set_param_en_multiple_tx_fifo(hsotg, params->en_multiple_tx_fifo); dwc2_set_param_reload_ctl(hsotg, params->reload_ctl); dwc2_set_param_ahbcfg(hsotg, params->ahbcfg); dwc2_set_param_otg_ver(hsotg, params->otg_ver); dwc2_set_param_uframe_sched(hsotg, params->uframe_sched); dwc2_set_param_external_id_pin_ctl(hsotg, params->external_id_pin_ctl); } EXPORT_SYMBOL_GPL(dwc2_set_parameters); /** * During device initialization, read various hardware configuration * registers and interpret the contents. */ int dwc2_get_hwparams(struct dwc2_hsotg *hsotg) { struct dwc2_hw_params *hw = &hsotg->hw_params; unsigned width; u32 hwcfg1, hwcfg2, hwcfg3, hwcfg4; u32 hptxfsiz, grxfsiz, gnptxfsiz; u32 gusbcfg; /* * Attempt to ensure this device is really a DWC_otg Controller. * Read and verify the GSNPSID register contents. The value should be * 0x45f42xxx or 0x45f43xxx, which corresponds to either "OT2" or "OT3", * as in "OTG version 2.xx" or "OTG version 3.xx". */ hw->snpsid = readl(hsotg->regs + GSNPSID); if ((hw->snpsid & 0xfffff000) != 0x4f542000 && (hw->snpsid & 0xfffff000) != 0x4f543000) { dev_err(hsotg->dev, "Bad value for GSNPSID: 0x%08x\n", hw->snpsid); return -ENODEV; } dev_dbg(hsotg->dev, "Core Release: %1x.%1x%1x%1x (snpsid=%x)\n", hw->snpsid >> 12 & 0xf, hw->snpsid >> 8 & 0xf, hw->snpsid >> 4 & 0xf, hw->snpsid & 0xf, hw->snpsid); hwcfg1 = readl(hsotg->regs + GHWCFG1); hwcfg2 = readl(hsotg->regs + GHWCFG2); hwcfg3 = readl(hsotg->regs + GHWCFG3); hwcfg4 = readl(hsotg->regs + GHWCFG4); grxfsiz = readl(hsotg->regs + GRXFSIZ); dev_dbg(hsotg->dev, "hwcfg1=%08x\n", hwcfg1); dev_dbg(hsotg->dev, "hwcfg2=%08x\n", hwcfg2); dev_dbg(hsotg->dev, "hwcfg3=%08x\n", hwcfg3); dev_dbg(hsotg->dev, "hwcfg4=%08x\n", hwcfg4); dev_dbg(hsotg->dev, "grxfsiz=%08x\n", grxfsiz); /* Force host mode to get HPTXFSIZ / GNPTXFSIZ exact power on value */ gusbcfg = readl(hsotg->regs + GUSBCFG); gusbcfg |= GUSBCFG_FORCEHOSTMODE; writel(gusbcfg, hsotg->regs + GUSBCFG); usleep_range(100000, 150000); gnptxfsiz = readl(hsotg->regs + GNPTXFSIZ); hptxfsiz = readl(hsotg->regs + HPTXFSIZ); dev_dbg(hsotg->dev, "gnptxfsiz=%08x\n", gnptxfsiz); dev_dbg(hsotg->dev, "hptxfsiz=%08x\n", hptxfsiz); gusbcfg = readl(hsotg->regs + GUSBCFG); gusbcfg &= ~GUSBCFG_FORCEHOSTMODE; writel(gusbcfg, hsotg->regs + GUSBCFG); usleep_range(100000, 150000); /* hwcfg2 */ hw->op_mode = (hwcfg2 & GHWCFG2_OP_MODE_MASK) >> GHWCFG2_OP_MODE_SHIFT; hw->arch = (hwcfg2 & GHWCFG2_ARCHITECTURE_MASK) >> GHWCFG2_ARCHITECTURE_SHIFT; hw->enable_dynamic_fifo = !!(hwcfg2 & GHWCFG2_DYNAMIC_FIFO); hw->host_channels = 1 + ((hwcfg2 & GHWCFG2_NUM_HOST_CHAN_MASK) >> GHWCFG2_NUM_HOST_CHAN_SHIFT); hw->hs_phy_type = (hwcfg2 & GHWCFG2_HS_PHY_TYPE_MASK) >> GHWCFG2_HS_PHY_TYPE_SHIFT; hw->fs_phy_type = (hwcfg2 & GHWCFG2_FS_PHY_TYPE_MASK) >> GHWCFG2_FS_PHY_TYPE_SHIFT; hw->num_dev_ep = (hwcfg2 & GHWCFG2_NUM_DEV_EP_MASK) >> GHWCFG2_NUM_DEV_EP_SHIFT; hw->nperio_tx_q_depth = (hwcfg2 & GHWCFG2_NONPERIO_TX_Q_DEPTH_MASK) >> GHWCFG2_NONPERIO_TX_Q_DEPTH_SHIFT << 1; hw->host_perio_tx_q_depth = (hwcfg2 & GHWCFG2_HOST_PERIO_TX_Q_DEPTH_MASK) >> GHWCFG2_HOST_PERIO_TX_Q_DEPTH_SHIFT << 1; hw->dev_token_q_depth = (hwcfg2 & GHWCFG2_DEV_TOKEN_Q_DEPTH_MASK) >> GHWCFG2_DEV_TOKEN_Q_DEPTH_SHIFT; /* hwcfg3 */ width = (hwcfg3 & GHWCFG3_XFER_SIZE_CNTR_WIDTH_MASK) >> GHWCFG3_XFER_SIZE_CNTR_WIDTH_SHIFT; hw->max_transfer_size = (1 << (width + 11)) - 1; /* * Clip max_transfer_size to 65535. dwc2_hc_setup_align_buf() allocates * coherent buffers with this size, and if it's too large we can * exhaust the coherent DMA pool. */ if (hw->max_transfer_size > 65535) hw->max_transfer_size = 65535; width = (hwcfg3 & GHWCFG3_PACKET_SIZE_CNTR_WIDTH_MASK) >> GHWCFG3_PACKET_SIZE_CNTR_WIDTH_SHIFT; hw->max_packet_count = (1 << (width + 4)) - 1; hw->i2c_enable = !!(hwcfg3 & GHWCFG3_I2C); hw->total_fifo_size = (hwcfg3 & GHWCFG3_DFIFO_DEPTH_MASK) >> GHWCFG3_DFIFO_DEPTH_SHIFT; /* hwcfg4 */ hw->en_multiple_tx_fifo = !!(hwcfg4 & GHWCFG4_DED_FIFO_EN); hw->num_dev_perio_in_ep = (hwcfg4 & GHWCFG4_NUM_DEV_PERIO_IN_EP_MASK) >> GHWCFG4_NUM_DEV_PERIO_IN_EP_SHIFT; hw->dma_desc_enable = !!(hwcfg4 & GHWCFG4_DESC_DMA); hw->power_optimized = !!(hwcfg4 & GHWCFG4_POWER_OPTIMIZ); hw->utmi_phy_data_width = (hwcfg4 & GHWCFG4_UTMI_PHY_DATA_WIDTH_MASK) >> GHWCFG4_UTMI_PHY_DATA_WIDTH_SHIFT; /* fifo sizes */ hw->host_rx_fifo_size = (grxfsiz & GRXFSIZ_DEPTH_MASK) >> GRXFSIZ_DEPTH_SHIFT; hw->host_nperio_tx_fifo_size = (gnptxfsiz & FIFOSIZE_DEPTH_MASK) >> FIFOSIZE_DEPTH_SHIFT; hw->host_perio_tx_fifo_size = (hptxfsiz & FIFOSIZE_DEPTH_MASK) >> FIFOSIZE_DEPTH_SHIFT; dev_dbg(hsotg->dev, "Detected values from hardware:\n"); dev_dbg(hsotg->dev, " op_mode=%d\n", hw->op_mode); dev_dbg(hsotg->dev, " arch=%d\n", hw->arch); dev_dbg(hsotg->dev, " dma_desc_enable=%d\n", hw->dma_desc_enable); dev_dbg(hsotg->dev, " power_optimized=%d\n", hw->power_optimized); dev_dbg(hsotg->dev, " i2c_enable=%d\n", hw->i2c_enable); dev_dbg(hsotg->dev, " hs_phy_type=%d\n", hw->hs_phy_type); dev_dbg(hsotg->dev, " fs_phy_type=%d\n", hw->fs_phy_type); dev_dbg(hsotg->dev, " utmi_phy_data_wdith=%d\n", hw->utmi_phy_data_width); dev_dbg(hsotg->dev, " num_dev_ep=%d\n", hw->num_dev_ep); dev_dbg(hsotg->dev, " num_dev_perio_in_ep=%d\n", hw->num_dev_perio_in_ep); dev_dbg(hsotg->dev, " host_channels=%d\n", hw->host_channels); dev_dbg(hsotg->dev, " max_transfer_size=%d\n", hw->max_transfer_size); dev_dbg(hsotg->dev, " max_packet_count=%d\n", hw->max_packet_count); dev_dbg(hsotg->dev, " nperio_tx_q_depth=0x%0x\n", hw->nperio_tx_q_depth); dev_dbg(hsotg->dev, " host_perio_tx_q_depth=0x%0x\n", hw->host_perio_tx_q_depth); dev_dbg(hsotg->dev, " dev_token_q_depth=0x%0x\n", hw->dev_token_q_depth); dev_dbg(hsotg->dev, " enable_dynamic_fifo=%d\n", hw->enable_dynamic_fifo); dev_dbg(hsotg->dev, " en_multiple_tx_fifo=%d\n", hw->en_multiple_tx_fifo); dev_dbg(hsotg->dev, " total_fifo_size=%d\n", hw->total_fifo_size); dev_dbg(hsotg->dev, " host_rx_fifo_size=%d\n", hw->host_rx_fifo_size); dev_dbg(hsotg->dev, " host_nperio_tx_fifo_size=%d\n", hw->host_nperio_tx_fifo_size); dev_dbg(hsotg->dev, " host_perio_tx_fifo_size=%d\n", hw->host_perio_tx_fifo_size); dev_dbg(hsotg->dev, "\n"); return 0; } EXPORT_SYMBOL_GPL(dwc2_get_hwparams); /* * Sets all parameters to the given value. * * Assumes that the dwc2_core_params struct contains only integers. */ void dwc2_set_all_params(struct dwc2_core_params *params, int value) { int *p = (int *)params; size_t size = sizeof(*params) / sizeof(*p); int i; for (i = 0; i < size; i++) p[i] = value; } EXPORT_SYMBOL_GPL(dwc2_set_all_params); u16 dwc2_get_otg_version(struct dwc2_hsotg *hsotg) { return hsotg->core_params->otg_ver == 1 ? 0x0200 : 0x0103; } bool dwc2_is_controller_alive(struct dwc2_hsotg *hsotg) { if (readl(hsotg->regs + GSNPSID) == 0xffffffff) return false; else return true; } /** * dwc2_enable_global_interrupts() - Enables the controller's Global * Interrupt in the AHB Config register * * @hsotg: Programming view of DWC_otg controller */ void dwc2_enable_global_interrupts(struct dwc2_hsotg *hsotg) { u32 ahbcfg = readl(hsotg->regs + GAHBCFG); ahbcfg |= GAHBCFG_GLBL_INTR_EN; writel(ahbcfg, hsotg->regs + GAHBCFG); } /** * dwc2_disable_global_interrupts() - Disables the controller's Global * Interrupt in the AHB Config register * * @hsotg: Programming view of DWC_otg controller */ void dwc2_disable_global_interrupts(struct dwc2_hsotg *hsotg) { u32 ahbcfg = readl(hsotg->regs + GAHBCFG); ahbcfg &= ~GAHBCFG_GLBL_INTR_EN; writel(ahbcfg, hsotg->regs + GAHBCFG); } MODULE_DESCRIPTION("DESIGNWARE HS OTG Core"); MODULE_AUTHOR("Synopsys, Inc."); MODULE_LICENSE("Dual BSD/GPL");