// SPDX-License-Identifier: GPL-2.0+ /* * Copyright (C) 2012 Oleksandr Tymoshenko * Copyright (C) 2014 Marek Vasut */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "dwc2.h" /* Use only HC channel 0. */ #define DWC2_HC_CHANNEL 0 #define DWC2_STATUS_BUF_SIZE 64 #define DWC2_DATA_BUF_SIZE (CONFIG_USB_DWC2_BUFFER_SIZE * 1024) #define MAX_DEVICE 16 #define MAX_ENDPOINT 16 struct dwc2_priv { #if CONFIG_IS_ENABLED(DM_USB) uint8_t aligned_buffer[DWC2_DATA_BUF_SIZE] __aligned(ARCH_DMA_MINALIGN); uint8_t status_buffer[DWC2_STATUS_BUF_SIZE] __aligned(ARCH_DMA_MINALIGN); #ifdef CONFIG_DM_REGULATOR struct udevice *vbus_supply; #endif struct phy phy; struct clk_bulk clks; #else uint8_t *aligned_buffer; uint8_t *status_buffer; #endif u8 in_data_toggle[MAX_DEVICE][MAX_ENDPOINT]; u8 out_data_toggle[MAX_DEVICE][MAX_ENDPOINT]; struct dwc2_core_regs *regs; int root_hub_devnum; bool ext_vbus; /* * The hnp/srp capability must be disabled if the platform * does't support hnp/srp. Otherwise the force mode can't work. */ bool hnp_srp_disable; bool oc_disable; struct reset_ctl_bulk resets; }; #if !CONFIG_IS_ENABLED(DM_USB) /* We need cacheline-aligned buffers for DMA transfers and dcache support */ DEFINE_ALIGN_BUFFER(uint8_t, aligned_buffer_addr, DWC2_DATA_BUF_SIZE, ARCH_DMA_MINALIGN); DEFINE_ALIGN_BUFFER(uint8_t, status_buffer_addr, DWC2_STATUS_BUF_SIZE, ARCH_DMA_MINALIGN); static struct dwc2_priv local; #endif /* * DWC2 IP interface */ /* * Initializes the FSLSPClkSel field of the HCFG register * depending on the PHY type. */ static void init_fslspclksel(struct dwc2_core_regs *regs) { uint32_t phyclk; #if (CONFIG_DWC2_PHY_TYPE == DWC2_PHY_TYPE_FS) phyclk = DWC2_HCFG_FSLSPCLKSEL_48_MHZ; /* Full speed PHY */ #else /* High speed PHY running at full speed or high speed */ phyclk = DWC2_HCFG_FSLSPCLKSEL_30_60_MHZ; #endif #ifdef CONFIG_DWC2_ULPI_FS_LS uint32_t hwcfg2 = readl(®s->ghwcfg2); uint32_t hval = (ghwcfg2 & DWC2_HWCFG2_HS_PHY_TYPE_MASK) >> DWC2_HWCFG2_HS_PHY_TYPE_OFFSET; uint32_t fval = (ghwcfg2 & DWC2_HWCFG2_FS_PHY_TYPE_MASK) >> DWC2_HWCFG2_FS_PHY_TYPE_OFFSET; if (hval == 2 && fval == 1) phyclk = DWC2_HCFG_FSLSPCLKSEL_48_MHZ; /* Full speed PHY */ #endif clrsetbits_le32(®s->host_regs.hcfg, DWC2_HCFG_FSLSPCLKSEL_MASK, phyclk << DWC2_HCFG_FSLSPCLKSEL_OFFSET); } /* * Flush a Tx FIFO. * * @param regs Programming view of DWC_otg controller. * @param num Tx FIFO to flush. */ static void dwc_otg_flush_tx_fifo(struct dwc2_core_regs *regs, const int num) { int ret; writel(DWC2_GRSTCTL_TXFFLSH | (num << DWC2_GRSTCTL_TXFNUM_OFFSET), ®s->grstctl); ret = wait_for_bit_le32(®s->grstctl, DWC2_GRSTCTL_TXFFLSH, false, 1000, false); if (ret) dev_info(dev, "%s: Timeout!\n", __func__); /* Wait for 3 PHY Clocks */ udelay(1); } /* * Flush Rx FIFO. * * @param regs Programming view of DWC_otg controller. */ static void dwc_otg_flush_rx_fifo(struct dwc2_core_regs *regs) { int ret; writel(DWC2_GRSTCTL_RXFFLSH, ®s->grstctl); ret = wait_for_bit_le32(®s->grstctl, DWC2_GRSTCTL_RXFFLSH, false, 1000, false); if (ret) dev_info(dev, "%s: Timeout!\n", __func__); /* Wait for 3 PHY Clocks */ udelay(1); } /* * Do core a soft reset of the core. Be careful with this because it * resets all the internal state machines of the core. */ static void dwc_otg_core_reset(struct dwc2_core_regs *regs) { int ret; /* Wait for AHB master IDLE state. */ ret = wait_for_bit_le32(®s->grstctl, DWC2_GRSTCTL_AHBIDLE, true, 1000, false); if (ret) dev_info(dev, "%s: Timeout!\n", __func__); /* Core Soft Reset */ writel(DWC2_GRSTCTL_CSFTRST, ®s->grstctl); ret = wait_for_bit_le32(®s->grstctl, DWC2_GRSTCTL_CSFTRST, false, 1000, false); if (ret) dev_info(dev, "%s: Timeout!\n", __func__); /* * Wait for core to come out of reset. * NOTE: This long sleep is _very_ important, otherwise the core will * not stay in host mode after a connector ID change! */ mdelay(100); } #if CONFIG_IS_ENABLED(DM_USB) && defined(CONFIG_DM_REGULATOR) static int dwc_vbus_supply_init(struct udevice *dev) { struct dwc2_priv *priv = dev_get_priv(dev); int ret; ret = device_get_supply_regulator(dev, "vbus-supply", &priv->vbus_supply); if (ret) { debug("%s: No vbus supply\n", dev->name); return 0; } ret = regulator_set_enable(priv->vbus_supply, true); if (ret) { dev_err(dev, "Error enabling vbus supply\n"); return ret; } return 0; } static int dwc_vbus_supply_exit(struct udevice *dev) { struct dwc2_priv *priv = dev_get_priv(dev); int ret; if (priv->vbus_supply) { ret = regulator_set_enable(priv->vbus_supply, false); if (ret) { dev_err(dev, "Error disabling vbus supply\n"); return ret; } } return 0; } #else static int dwc_vbus_supply_init(struct udevice *dev) { return 0; } #if CONFIG_IS_ENABLED(DM_USB) static int dwc_vbus_supply_exit(struct udevice *dev) { return 0; } #endif #endif /* * This function initializes the DWC_otg controller registers for * host mode. * * This function flushes the Tx and Rx FIFOs and it flushes any entries in the * request queues. Host channels are reset to ensure that they are ready for * performing transfers. * * @param dev USB Device (NULL if driver model is not being used) * @param regs Programming view of DWC_otg controller * */ static void dwc_otg_core_host_init(struct udevice *dev, struct dwc2_core_regs *regs) { uint32_t nptxfifosize = 0; uint32_t ptxfifosize = 0; uint32_t hprt0 = 0; int i, ret, num_channels; /* Restart the Phy Clock */ writel(0, ®s->pcgcctl); /* Initialize Host Configuration Register */ init_fslspclksel(regs); #ifdef CONFIG_DWC2_DFLT_SPEED_FULL setbits_le32(®s->host_regs.hcfg, DWC2_HCFG_FSLSSUPP); #endif /* Configure data FIFO sizes */ #ifdef CONFIG_DWC2_ENABLE_DYNAMIC_FIFO if (readl(®s->ghwcfg2) & DWC2_HWCFG2_DYNAMIC_FIFO) { /* Rx FIFO */ writel(CONFIG_DWC2_HOST_RX_FIFO_SIZE, ®s->grxfsiz); /* Non-periodic Tx FIFO */ nptxfifosize |= CONFIG_DWC2_HOST_NPERIO_TX_FIFO_SIZE << DWC2_FIFOSIZE_DEPTH_OFFSET; nptxfifosize |= CONFIG_DWC2_HOST_RX_FIFO_SIZE << DWC2_FIFOSIZE_STARTADDR_OFFSET; writel(nptxfifosize, ®s->gnptxfsiz); /* Periodic Tx FIFO */ ptxfifosize |= CONFIG_DWC2_HOST_PERIO_TX_FIFO_SIZE << DWC2_FIFOSIZE_DEPTH_OFFSET; ptxfifosize |= (CONFIG_DWC2_HOST_RX_FIFO_SIZE + CONFIG_DWC2_HOST_NPERIO_TX_FIFO_SIZE) << DWC2_FIFOSIZE_STARTADDR_OFFSET; writel(ptxfifosize, ®s->hptxfsiz); } #endif /* Clear Host Set HNP Enable in the OTG Control Register */ clrbits_le32(®s->gotgctl, DWC2_GOTGCTL_HSTSETHNPEN); /* Make sure the FIFOs are flushed. */ dwc_otg_flush_tx_fifo(regs, 0x10); /* All Tx FIFOs */ dwc_otg_flush_rx_fifo(regs); /* Flush out any leftover queued requests. */ num_channels = readl(®s->ghwcfg2); num_channels &= DWC2_HWCFG2_NUM_HOST_CHAN_MASK; num_channels >>= DWC2_HWCFG2_NUM_HOST_CHAN_OFFSET; num_channels += 1; for (i = 0; i < num_channels; i++) clrsetbits_le32(®s->hc_regs[i].hcchar, DWC2_HCCHAR_CHEN | DWC2_HCCHAR_EPDIR, DWC2_HCCHAR_CHDIS); /* Halt all channels to put them into a known state. */ for (i = 0; i < num_channels; i++) { clrsetbits_le32(®s->hc_regs[i].hcchar, DWC2_HCCHAR_EPDIR, DWC2_HCCHAR_CHEN | DWC2_HCCHAR_CHDIS); ret = wait_for_bit_le32(®s->hc_regs[i].hcchar, DWC2_HCCHAR_CHEN, false, 1000, false); if (ret) dev_info("%s: Timeout!\n", __func__); } /* Turn on the vbus power. */ if (readl(®s->gintsts) & DWC2_GINTSTS_CURMODE_HOST) { hprt0 = readl(®s->hprt0); hprt0 &= ~(DWC2_HPRT0_PRTENA | DWC2_HPRT0_PRTCONNDET); hprt0 &= ~(DWC2_HPRT0_PRTENCHNG | DWC2_HPRT0_PRTOVRCURRCHNG); if (!(hprt0 & DWC2_HPRT0_PRTPWR)) { hprt0 |= DWC2_HPRT0_PRTPWR; writel(hprt0, ®s->hprt0); } } if (dev) dwc_vbus_supply_init(dev); } /* * This function initializes the DWC_otg controller registers and * prepares the core for device mode or host mode operation. * * @param regs Programming view of the DWC_otg controller */ static void dwc_otg_core_init(struct dwc2_priv *priv) { struct dwc2_core_regs *regs = priv->regs; uint32_t ahbcfg = 0; uint32_t usbcfg = 0; uint8_t brst_sz = CONFIG_DWC2_DMA_BURST_SIZE; /* Common Initialization */ usbcfg = readl(®s->gusbcfg); /* Program the ULPI External VBUS bit if needed */ if (priv->ext_vbus) { usbcfg |= DWC2_GUSBCFG_ULPI_EXT_VBUS_DRV; if (!priv->oc_disable) { usbcfg |= DWC2_GUSBCFG_ULPI_INT_VBUS_INDICATOR | DWC2_GUSBCFG_INDICATOR_PASSTHROUGH; } } else { usbcfg &= ~DWC2_GUSBCFG_ULPI_EXT_VBUS_DRV; } /* Set external TS Dline pulsing */ #ifdef CONFIG_DWC2_TS_DLINE usbcfg |= DWC2_GUSBCFG_TERM_SEL_DL_PULSE; #else usbcfg &= ~DWC2_GUSBCFG_TERM_SEL_DL_PULSE; #endif writel(usbcfg, ®s->gusbcfg); /* Reset the Controller */ dwc_otg_core_reset(regs); /* * This programming sequence needs to happen in FS mode before * any other programming occurs */ #if defined(CONFIG_DWC2_DFLT_SPEED_FULL) && \ (CONFIG_DWC2_PHY_TYPE == DWC2_PHY_TYPE_FS) /* If FS mode with FS PHY */ setbits_le32(®s->gusbcfg, DWC2_GUSBCFG_PHYSEL); /* Reset after a PHY select */ dwc_otg_core_reset(regs); /* * 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 (readl(®s->gintsts) & DWC2_GINTSTS_CURMODE_HOST) init_fslspclksel(regs); #ifdef CONFIG_DWC2_I2C_ENABLE /* Program GUSBCFG.OtgUtmifsSel to I2C */ setbits_le32(®s->gusbcfg, DWC2_GUSBCFG_OTGUTMIFSSEL); /* Program GI2CCTL.I2CEn */ clrsetbits_le32(®s->gi2cctl, DWC2_GI2CCTL_I2CEN | DWC2_GI2CCTL_I2CDEVADDR_MASK, 1 << DWC2_GI2CCTL_I2CDEVADDR_OFFSET); setbits_le32(®s->gi2cctl, DWC2_GI2CCTL_I2CEN); #endif #else /* High speed PHY. */ /* * HS PHY parameters. These parameters are preserved during * soft reset so only program the first time. Do a soft reset * immediately after setting phyif. */ usbcfg &= ~(DWC2_GUSBCFG_ULPI_UTMI_SEL | DWC2_GUSBCFG_PHYIF); usbcfg |= CONFIG_DWC2_PHY_TYPE << DWC2_GUSBCFG_ULPI_UTMI_SEL_OFFSET; if (usbcfg & DWC2_GUSBCFG_ULPI_UTMI_SEL) { /* ULPI interface */ #ifdef CONFIG_DWC2_PHY_ULPI_DDR usbcfg |= DWC2_GUSBCFG_DDRSEL; #else usbcfg &= ~DWC2_GUSBCFG_DDRSEL; #endif } else { /* UTMI+ interface */ #if (CONFIG_DWC2_UTMI_WIDTH == 16) usbcfg |= DWC2_GUSBCFG_PHYIF; #endif } writel(usbcfg, ®s->gusbcfg); /* Reset after setting the PHY parameters */ dwc_otg_core_reset(regs); #endif usbcfg = readl(®s->gusbcfg); usbcfg &= ~(DWC2_GUSBCFG_ULPI_FSLS | DWC2_GUSBCFG_ULPI_CLK_SUS_M); #ifdef CONFIG_DWC2_ULPI_FS_LS uint32_t hwcfg2 = readl(®s->ghwcfg2); uint32_t hval = (ghwcfg2 & DWC2_HWCFG2_HS_PHY_TYPE_MASK) >> DWC2_HWCFG2_HS_PHY_TYPE_OFFSET; uint32_t fval = (ghwcfg2 & DWC2_HWCFG2_FS_PHY_TYPE_MASK) >> DWC2_HWCFG2_FS_PHY_TYPE_OFFSET; if (hval == 2 && fval == 1) { usbcfg |= DWC2_GUSBCFG_ULPI_FSLS; usbcfg |= DWC2_GUSBCFG_ULPI_CLK_SUS_M; } #endif if (priv->hnp_srp_disable) usbcfg |= DWC2_GUSBCFG_FORCEHOSTMODE; writel(usbcfg, ®s->gusbcfg); /* Program the GAHBCFG Register. */ switch (readl(®s->ghwcfg2) & DWC2_HWCFG2_ARCHITECTURE_MASK) { case DWC2_HWCFG2_ARCHITECTURE_SLAVE_ONLY: break; case DWC2_HWCFG2_ARCHITECTURE_EXT_DMA: while (brst_sz > 1) { ahbcfg |= ahbcfg + (1 << DWC2_GAHBCFG_HBURSTLEN_OFFSET); ahbcfg &= DWC2_GAHBCFG_HBURSTLEN_MASK; brst_sz >>= 1; } #ifdef CONFIG_DWC2_DMA_ENABLE ahbcfg |= DWC2_GAHBCFG_DMAENABLE; #endif break; case DWC2_HWCFG2_ARCHITECTURE_INT_DMA: ahbcfg |= DWC2_GAHBCFG_HBURSTLEN_INCR4; #ifdef CONFIG_DWC2_DMA_ENABLE ahbcfg |= DWC2_GAHBCFG_DMAENABLE; #endif break; } writel(ahbcfg, ®s->gahbcfg); /* Program the capabilities in GUSBCFG Register */ usbcfg = 0; if (!priv->hnp_srp_disable) usbcfg |= DWC2_GUSBCFG_HNPCAP | DWC2_GUSBCFG_SRPCAP; #ifdef CONFIG_DWC2_IC_USB_CAP usbcfg |= DWC2_GUSBCFG_IC_USB_CAP; #endif setbits_le32(®s->gusbcfg, usbcfg); } /* * Prepares a host channel for transferring packets to/from a specific * endpoint. The HCCHARn register is set up with the characteristics specified * in _hc. Host channel interrupts that may need to be serviced while this * transfer is in progress are enabled. * * @param regs Programming view of DWC_otg controller * @param hc Information needed to initialize the host channel */ static void dwc_otg_hc_init(struct dwc2_core_regs *regs, uint8_t hc_num, struct usb_device *dev, uint8_t dev_addr, uint8_t ep_num, uint8_t ep_is_in, uint8_t ep_type, uint16_t max_packet) { struct dwc2_hc_regs *hc_regs = ®s->hc_regs[hc_num]; uint32_t hcchar = (dev_addr << DWC2_HCCHAR_DEVADDR_OFFSET) | (ep_num << DWC2_HCCHAR_EPNUM_OFFSET) | (ep_is_in << DWC2_HCCHAR_EPDIR_OFFSET) | (ep_type << DWC2_HCCHAR_EPTYPE_OFFSET) | (max_packet << DWC2_HCCHAR_MPS_OFFSET); if (dev->speed == USB_SPEED_LOW) hcchar |= DWC2_HCCHAR_LSPDDEV; /* * Program the HCCHARn register with the endpoint characteristics * for the current transfer. */ writel(hcchar, &hc_regs->hcchar); /* Program the HCSPLIT register, default to no SPLIT */ writel(0, &hc_regs->hcsplt); } static void dwc_otg_hc_init_split(struct dwc2_hc_regs *hc_regs, uint8_t hub_devnum, uint8_t hub_port) { uint32_t hcsplt = 0; hcsplt = DWC2_HCSPLT_SPLTENA; hcsplt |= hub_devnum << DWC2_HCSPLT_HUBADDR_OFFSET; hcsplt |= hub_port << DWC2_HCSPLT_PRTADDR_OFFSET; /* Program the HCSPLIT register for SPLITs */ writel(hcsplt, &hc_regs->hcsplt); } /* * DWC2 to USB API interface */ /* Direction: In ; Request: Status */ static int dwc_otg_submit_rh_msg_in_status(struct dwc2_core_regs *regs, struct usb_device *dev, void *buffer, int txlen, struct devrequest *cmd) { uint32_t hprt0 = 0; uint32_t port_status = 0; uint32_t port_change = 0; int len = 0; int stat = 0; switch (cmd->requesttype & ~USB_DIR_IN) { case 0: *(uint16_t *)buffer = cpu_to_le16(1); len = 2; break; case USB_RECIP_INTERFACE: case USB_RECIP_ENDPOINT: *(uint16_t *)buffer = cpu_to_le16(0); len = 2; break; case USB_TYPE_CLASS: *(uint32_t *)buffer = cpu_to_le32(0); len = 4; break; case USB_RECIP_OTHER | USB_TYPE_CLASS: hprt0 = readl(®s->hprt0); if (hprt0 & DWC2_HPRT0_PRTCONNSTS) port_status |= USB_PORT_STAT_CONNECTION; if (hprt0 & DWC2_HPRT0_PRTENA) port_status |= USB_PORT_STAT_ENABLE; if (hprt0 & DWC2_HPRT0_PRTSUSP) port_status |= USB_PORT_STAT_SUSPEND; if (hprt0 & DWC2_HPRT0_PRTOVRCURRACT) port_status |= USB_PORT_STAT_OVERCURRENT; if (hprt0 & DWC2_HPRT0_PRTRST) port_status |= USB_PORT_STAT_RESET; if (hprt0 & DWC2_HPRT0_PRTPWR) port_status |= USB_PORT_STAT_POWER; if ((hprt0 & DWC2_HPRT0_PRTSPD_MASK) == DWC2_HPRT0_PRTSPD_LOW) port_status |= USB_PORT_STAT_LOW_SPEED; else if ((hprt0 & DWC2_HPRT0_PRTSPD_MASK) == DWC2_HPRT0_PRTSPD_HIGH) port_status |= USB_PORT_STAT_HIGH_SPEED; if (hprt0 & DWC2_HPRT0_PRTENCHNG) port_change |= USB_PORT_STAT_C_ENABLE; if (hprt0 & DWC2_HPRT0_PRTCONNDET) port_change |= USB_PORT_STAT_C_CONNECTION; if (hprt0 & DWC2_HPRT0_PRTOVRCURRCHNG) port_change |= USB_PORT_STAT_C_OVERCURRENT; *(uint32_t *)buffer = cpu_to_le32(port_status | (port_change << 16)); len = 4; break; default: puts("unsupported root hub command\n"); stat = USB_ST_STALLED; } dev->act_len = min(len, txlen); dev->status = stat; return stat; } /* Direction: In ; Request: Descriptor */ static int dwc_otg_submit_rh_msg_in_descriptor(struct usb_device *dev, void *buffer, int txlen, struct devrequest *cmd) { unsigned char data[32]; uint32_t dsc; int len = 0; int stat = 0; uint16_t wValue = cpu_to_le16(cmd->value); uint16_t wLength = cpu_to_le16(cmd->length); switch (cmd->requesttype & ~USB_DIR_IN) { case 0: switch (wValue & 0xff00) { case 0x0100: /* device descriptor */ len = min3(txlen, (int)sizeof(root_hub_dev_des), (int)wLength); memcpy(buffer, root_hub_dev_des, len); break; case 0x0200: /* configuration descriptor */ len = min3(txlen, (int)sizeof(root_hub_config_des), (int)wLength); memcpy(buffer, root_hub_config_des, len); break; case 0x0300: /* string descriptors */ switch (wValue & 0xff) { case 0x00: len = min3(txlen, (int)sizeof(root_hub_str_index0), (int)wLength); memcpy(buffer, root_hub_str_index0, len); break; case 0x01: len = min3(txlen, (int)sizeof(root_hub_str_index1), (int)wLength); memcpy(buffer, root_hub_str_index1, len); break; } break; default: stat = USB_ST_STALLED; } break; case USB_TYPE_CLASS: /* Root port config, set 1 port and nothing else. */ dsc = 0x00000001; data[0] = 9; /* min length; */ data[1] = 0x29; data[2] = dsc & RH_A_NDP; data[3] = 0; if (dsc & RH_A_PSM) data[3] |= 0x1; if (dsc & RH_A_NOCP) data[3] |= 0x10; else if (dsc & RH_A_OCPM) data[3] |= 0x8; /* corresponds to data[4-7] */ data[5] = (dsc & RH_A_POTPGT) >> 24; data[7] = dsc & RH_B_DR; if (data[2] < 7) { data[8] = 0xff; } else { data[0] += 2; data[8] = (dsc & RH_B_DR) >> 8; data[9] = 0xff; data[10] = data[9]; } len = min3(txlen, (int)data[0], (int)wLength); memcpy(buffer, data, len); break; default: puts("unsupported root hub command\n"); stat = USB_ST_STALLED; } dev->act_len = min(len, txlen); dev->status = stat; return stat; } /* Direction: In ; Request: Configuration */ static int dwc_otg_submit_rh_msg_in_configuration(struct usb_device *dev, void *buffer, int txlen, struct devrequest *cmd) { int len = 0; int stat = 0; switch (cmd->requesttype & ~USB_DIR_IN) { case 0: *(uint8_t *)buffer = 0x01; len = 1; break; default: puts("unsupported root hub command\n"); stat = USB_ST_STALLED; } dev->act_len = min(len, txlen); dev->status = stat; return stat; } /* Direction: In */ static int dwc_otg_submit_rh_msg_in(struct dwc2_priv *priv, struct usb_device *dev, void *buffer, int txlen, struct devrequest *cmd) { switch (cmd->request) { case USB_REQ_GET_STATUS: return dwc_otg_submit_rh_msg_in_status(priv->regs, dev, buffer, txlen, cmd); case USB_REQ_GET_DESCRIPTOR: return dwc_otg_submit_rh_msg_in_descriptor(dev, buffer, txlen, cmd); case USB_REQ_GET_CONFIGURATION: return dwc_otg_submit_rh_msg_in_configuration(dev, buffer, txlen, cmd); default: puts("unsupported root hub command\n"); return USB_ST_STALLED; } } /* Direction: Out */ static int dwc_otg_submit_rh_msg_out(struct dwc2_priv *priv, struct usb_device *dev, void *buffer, int txlen, struct devrequest *cmd) { struct dwc2_core_regs *regs = priv->regs; int len = 0; int stat = 0; uint16_t bmrtype_breq = cmd->requesttype | (cmd->request << 8); uint16_t wValue = cpu_to_le16(cmd->value); switch (bmrtype_breq & ~USB_DIR_IN) { case (USB_REQ_CLEAR_FEATURE << 8) | USB_RECIP_ENDPOINT: case (USB_REQ_CLEAR_FEATURE << 8) | USB_TYPE_CLASS: break; case (USB_REQ_CLEAR_FEATURE << 8) | USB_RECIP_OTHER | USB_TYPE_CLASS: switch (wValue) { case USB_PORT_FEAT_C_CONNECTION: setbits_le32(®s->hprt0, DWC2_HPRT0_PRTCONNDET); break; } break; case (USB_REQ_SET_FEATURE << 8) | USB_RECIP_OTHER | USB_TYPE_CLASS: switch (wValue) { case USB_PORT_FEAT_SUSPEND: break; case USB_PORT_FEAT_RESET: clrsetbits_le32(®s->hprt0, DWC2_HPRT0_PRTENA | DWC2_HPRT0_PRTCONNDET | DWC2_HPRT0_PRTENCHNG | DWC2_HPRT0_PRTOVRCURRCHNG, DWC2_HPRT0_PRTRST); mdelay(50); clrbits_le32(®s->hprt0, DWC2_HPRT0_PRTRST); break; case USB_PORT_FEAT_POWER: clrsetbits_le32(®s->hprt0, DWC2_HPRT0_PRTENA | DWC2_HPRT0_PRTCONNDET | DWC2_HPRT0_PRTENCHNG | DWC2_HPRT0_PRTOVRCURRCHNG, DWC2_HPRT0_PRTRST); break; case USB_PORT_FEAT_ENABLE: break; } break; case (USB_REQ_SET_ADDRESS << 8): priv->root_hub_devnum = wValue; break; case (USB_REQ_SET_CONFIGURATION << 8): break; default: puts("unsupported root hub command\n"); stat = USB_ST_STALLED; } len = min(len, txlen); dev->act_len = len; dev->status = stat; return stat; } static int dwc_otg_submit_rh_msg(struct dwc2_priv *priv, struct usb_device *dev, unsigned long pipe, void *buffer, int txlen, struct devrequest *cmd) { int stat = 0; if (usb_pipeint(pipe)) { puts("Root-Hub submit IRQ: NOT implemented\n"); return 0; } if (cmd->requesttype & USB_DIR_IN) stat = dwc_otg_submit_rh_msg_in(priv, dev, buffer, txlen, cmd); else stat = dwc_otg_submit_rh_msg_out(priv, dev, buffer, txlen, cmd); mdelay(1); return stat; } int wait_for_chhltd(struct dwc2_hc_regs *hc_regs, uint32_t *sub, u8 *toggle) { int ret; uint32_t hcint, hctsiz; ret = wait_for_bit_le32(&hc_regs->hcint, DWC2_HCINT_CHHLTD, true, 2000, false); if (ret) return ret; hcint = readl(&hc_regs->hcint); hctsiz = readl(&hc_regs->hctsiz); *sub = (hctsiz & DWC2_HCTSIZ_XFERSIZE_MASK) >> DWC2_HCTSIZ_XFERSIZE_OFFSET; *toggle = (hctsiz & DWC2_HCTSIZ_PID_MASK) >> DWC2_HCTSIZ_PID_OFFSET; debug("%s: HCINT=%08x sub=%u toggle=%d\n", __func__, hcint, *sub, *toggle); if (hcint & DWC2_HCINT_XFERCOMP) return 0; if (hcint & (DWC2_HCINT_NAK | DWC2_HCINT_FRMOVRUN)) return -EAGAIN; debug("%s: Error (HCINT=%08x)\n", __func__, hcint); return -EINVAL; } static int dwc2_eptype[] = { DWC2_HCCHAR_EPTYPE_ISOC, DWC2_HCCHAR_EPTYPE_INTR, DWC2_HCCHAR_EPTYPE_CONTROL, DWC2_HCCHAR_EPTYPE_BULK, }; static int transfer_chunk(struct dwc2_hc_regs *hc_regs, void *aligned_buffer, u8 *pid, int in, void *buffer, int num_packets, int xfer_len, int *actual_len, int odd_frame) { int ret = 0; uint32_t sub; debug("%s: chunk: pid %d xfer_len %u pkts %u\n", __func__, *pid, xfer_len, num_packets); writel((xfer_len << DWC2_HCTSIZ_XFERSIZE_OFFSET) | (num_packets << DWC2_HCTSIZ_PKTCNT_OFFSET) | (*pid << DWC2_HCTSIZ_PID_OFFSET), &hc_regs->hctsiz); if (xfer_len) { if (in) { invalidate_dcache_range( (uintptr_t)aligned_buffer, (uintptr_t)aligned_buffer + roundup(xfer_len, ARCH_DMA_MINALIGN)); } else { memcpy(aligned_buffer, buffer, xfer_len); flush_dcache_range( (uintptr_t)aligned_buffer, (uintptr_t)aligned_buffer + roundup(xfer_len, ARCH_DMA_MINALIGN)); } } writel(phys_to_bus((unsigned long)aligned_buffer), &hc_regs->hcdma); /* Clear old interrupt conditions for this host channel. */ writel(0x3fff, &hc_regs->hcint); /* Set host channel enable after all other setup is complete. */ clrsetbits_le32(&hc_regs->hcchar, DWC2_HCCHAR_MULTICNT_MASK | DWC2_HCCHAR_CHEN | DWC2_HCCHAR_CHDIS | DWC2_HCCHAR_ODDFRM, (1 << DWC2_HCCHAR_MULTICNT_OFFSET) | (odd_frame << DWC2_HCCHAR_ODDFRM_OFFSET) | DWC2_HCCHAR_CHEN); ret = wait_for_chhltd(hc_regs, &sub, pid); if (ret < 0) return ret; if (in) { xfer_len -= sub; invalidate_dcache_range((unsigned long)aligned_buffer, (unsigned long)aligned_buffer + roundup(xfer_len, ARCH_DMA_MINALIGN)); memcpy(buffer, aligned_buffer, xfer_len); } *actual_len = xfer_len; return ret; } int chunk_msg(struct dwc2_priv *priv, struct usb_device *dev, unsigned long pipe, u8 *pid, int in, void *buffer, int len) { struct dwc2_core_regs *regs = priv->regs; struct dwc2_hc_regs *hc_regs = ®s->hc_regs[DWC2_HC_CHANNEL]; struct dwc2_host_regs *host_regs = ®s->host_regs; int devnum = usb_pipedevice(pipe); int ep = usb_pipeendpoint(pipe); int max = usb_maxpacket(dev, pipe); int eptype = dwc2_eptype[usb_pipetype(pipe)]; int done = 0; int ret = 0; int do_split = 0; int complete_split = 0; uint32_t xfer_len; uint32_t num_packets; int stop_transfer = 0; uint32_t max_xfer_len; int ssplit_frame_num = 0; debug("%s: msg: pipe %lx pid %d in %d len %d\n", __func__, pipe, *pid, in, len); max_xfer_len = CONFIG_DWC2_MAX_PACKET_COUNT * max; if (max_xfer_len > CONFIG_DWC2_MAX_TRANSFER_SIZE) max_xfer_len = CONFIG_DWC2_MAX_TRANSFER_SIZE; if (max_xfer_len > DWC2_DATA_BUF_SIZE) max_xfer_len = DWC2_DATA_BUF_SIZE; /* Make sure that max_xfer_len is a multiple of max packet size. */ num_packets = max_xfer_len / max; max_xfer_len = num_packets * max; /* Initialize channel */ dwc_otg_hc_init(regs, DWC2_HC_CHANNEL, dev, devnum, ep, in, eptype, max); /* Check if the target is a FS/LS device behind a HS hub */ if (dev->speed != USB_SPEED_HIGH) { uint8_t hub_addr; uint8_t hub_port; uint32_t hprt0 = readl(®s->hprt0); if ((hprt0 & DWC2_HPRT0_PRTSPD_MASK) == DWC2_HPRT0_PRTSPD_HIGH) { usb_find_usb2_hub_address_port(dev, &hub_addr, &hub_port); dwc_otg_hc_init_split(hc_regs, hub_addr, hub_port); do_split = 1; num_packets = 1; max_xfer_len = max; } } do { int actual_len = 0; uint32_t hcint; int odd_frame = 0; xfer_len = len - done; if (xfer_len > max_xfer_len) xfer_len = max_xfer_len; else if (xfer_len > max) num_packets = (xfer_len + max - 1) / max; else num_packets = 1; if (complete_split) setbits_le32(&hc_regs->hcsplt, DWC2_HCSPLT_COMPSPLT); else if (do_split) clrbits_le32(&hc_regs->hcsplt, DWC2_HCSPLT_COMPSPLT); if (eptype == DWC2_HCCHAR_EPTYPE_INTR) { int uframe_num = readl(&host_regs->hfnum); if (!(uframe_num & 0x1)) odd_frame = 1; } ret = transfer_chunk(hc_regs, priv->aligned_buffer, pid, in, (char *)buffer + done, num_packets, xfer_len, &actual_len, odd_frame); hcint = readl(&hc_regs->hcint); if (complete_split) { stop_transfer = 0; if (hcint & DWC2_HCINT_NYET) { ret = 0; int frame_num = DWC2_HFNUM_MAX_FRNUM & readl(&host_regs->hfnum); if (((frame_num - ssplit_frame_num) & DWC2_HFNUM_MAX_FRNUM) > 4) ret = -EAGAIN; } else complete_split = 0; } else if (do_split) { if (hcint & DWC2_HCINT_ACK) { ssplit_frame_num = DWC2_HFNUM_MAX_FRNUM & readl(&host_regs->hfnum); ret = 0; complete_split = 1; } } if (ret) break; if (actual_len < xfer_len) stop_transfer = 1; done += actual_len; /* Transactions are done when when either all data is transferred or * there is a short transfer. In case of a SPLIT make sure the CSPLIT * is executed. */ } while (((done < len) && !stop_transfer) || complete_split); writel(0, &hc_regs->hcintmsk); writel(0xFFFFFFFF, &hc_regs->hcint); dev->status = 0; dev->act_len = done; return ret; } /* U-Boot USB transmission interface */ int _submit_bulk_msg(struct dwc2_priv *priv, struct usb_device *dev, unsigned long pipe, void *buffer, int len) { int devnum = usb_pipedevice(pipe); int ep = usb_pipeendpoint(pipe); u8* pid; if ((devnum >= MAX_DEVICE) || (devnum == priv->root_hub_devnum)) { dev->status = 0; return -EINVAL; } if (usb_pipein(pipe)) pid = &priv->in_data_toggle[devnum][ep]; else pid = &priv->out_data_toggle[devnum][ep]; return chunk_msg(priv, dev, pipe, pid, usb_pipein(pipe), buffer, len); } static int _submit_control_msg(struct dwc2_priv *priv, struct usb_device *dev, unsigned long pipe, void *buffer, int len, struct devrequest *setup) { int devnum = usb_pipedevice(pipe); int ret, act_len; u8 pid; /* For CONTROL endpoint pid should start with DATA1 */ int status_direction; if (devnum == priv->root_hub_devnum) { dev->status = 0; dev->speed = USB_SPEED_HIGH; return dwc_otg_submit_rh_msg(priv, dev, pipe, buffer, len, setup); } /* SETUP stage */ pid = DWC2_HC_PID_SETUP; do { ret = chunk_msg(priv, dev, pipe, &pid, 0, setup, 8); } while (ret == -EAGAIN); if (ret) return ret; /* DATA stage */ act_len = 0; if (buffer) { pid = DWC2_HC_PID_DATA1; do { ret = chunk_msg(priv, dev, pipe, &pid, usb_pipein(pipe), buffer, len); act_len += dev->act_len; buffer += dev->act_len; len -= dev->act_len; } while (ret == -EAGAIN); if (ret) return ret; status_direction = usb_pipeout(pipe); } else { /* No-data CONTROL always ends with an IN transaction */ status_direction = 1; } /* STATUS stage */ pid = DWC2_HC_PID_DATA1; do { ret = chunk_msg(priv, dev, pipe, &pid, status_direction, priv->status_buffer, 0); } while (ret == -EAGAIN); if (ret) return ret; dev->act_len = act_len; return 0; } int _submit_int_msg(struct dwc2_priv *priv, struct usb_device *dev, unsigned long pipe, void *buffer, int len, int interval, bool nonblock) { unsigned long timeout; int ret; /* FIXME: what is interval? */ timeout = get_timer(0) + USB_TIMEOUT_MS(pipe); for (;;) { if (get_timer(0) > timeout) { dev_err(dev, "Timeout poll on interrupt endpoint\n"); return -ETIMEDOUT; } ret = _submit_bulk_msg(priv, dev, pipe, buffer, len); if ((ret != -EAGAIN) || nonblock) return ret; } } static int dwc2_reset(struct udevice *dev) { int ret; struct dwc2_priv *priv = dev_get_priv(dev); ret = reset_get_bulk(dev, &priv->resets); if (ret) { dev_warn(dev, "Can't get reset: %d\n", ret); /* Return 0 if error due to !CONFIG_DM_RESET and reset * DT property is not present. */ if (ret == -ENOENT || ret == -ENOTSUPP) return 0; else return ret; } /* force reset to clear all IP register */ reset_assert_bulk(&priv->resets); ret = reset_deassert_bulk(&priv->resets); if (ret) { reset_release_bulk(&priv->resets); dev_err(dev, "Failed to reset: %d\n", ret); return ret; } return 0; } static int dwc2_init_common(struct udevice *dev, struct dwc2_priv *priv) { struct dwc2_core_regs *regs = priv->regs; uint32_t snpsid; int i, j; int ret; ret = dwc2_reset(dev); if (ret) return ret; snpsid = readl(®s->gsnpsid); dev_info(dev, "Core Release: %x.%03x\n", snpsid >> 12 & 0xf, snpsid & 0xfff); if ((snpsid & DWC2_SNPSID_DEVID_MASK) != DWC2_SNPSID_DEVID_VER_2xx && (snpsid & DWC2_SNPSID_DEVID_MASK) != DWC2_SNPSID_DEVID_VER_3xx) { dev_info(dev, "SNPSID invalid (not DWC2 OTG device): %08x\n", snpsid); return -ENODEV; } #ifdef CONFIG_DWC2_PHY_ULPI_EXT_VBUS priv->ext_vbus = 1; #else priv->ext_vbus = 0; #endif dwc_otg_core_init(priv); dwc_otg_core_host_init(dev, regs); clrsetbits_le32(®s->hprt0, DWC2_HPRT0_PRTENA | DWC2_HPRT0_PRTCONNDET | DWC2_HPRT0_PRTENCHNG | DWC2_HPRT0_PRTOVRCURRCHNG, DWC2_HPRT0_PRTRST); mdelay(50); clrbits_le32(®s->hprt0, DWC2_HPRT0_PRTENA | DWC2_HPRT0_PRTCONNDET | DWC2_HPRT0_PRTENCHNG | DWC2_HPRT0_PRTOVRCURRCHNG | DWC2_HPRT0_PRTRST); for (i = 0; i < MAX_DEVICE; i++) { for (j = 0; j < MAX_ENDPOINT; j++) { priv->in_data_toggle[i][j] = DWC2_HC_PID_DATA0; priv->out_data_toggle[i][j] = DWC2_HC_PID_DATA0; } } /* * Add a 1 second delay here. This gives the host controller * a bit time before the comminucation with the USB devices * is started (the bus is scanned) and fixes the USB detection * problems with some problematic USB keys. */ if (readl(®s->gintsts) & DWC2_GINTSTS_CURMODE_HOST) mdelay(1000); return 0; } static void dwc2_uninit_common(struct dwc2_core_regs *regs) { /* Put everything in reset. */ clrsetbits_le32(®s->hprt0, DWC2_HPRT0_PRTENA | DWC2_HPRT0_PRTCONNDET | DWC2_HPRT0_PRTENCHNG | DWC2_HPRT0_PRTOVRCURRCHNG, DWC2_HPRT0_PRTRST); } #if !CONFIG_IS_ENABLED(DM_USB) int submit_control_msg(struct usb_device *dev, unsigned long pipe, void *buffer, int len, struct devrequest *setup) { return _submit_control_msg(&local, dev, pipe, buffer, len, setup); } int submit_bulk_msg(struct usb_device *dev, unsigned long pipe, void *buffer, int len) { return _submit_bulk_msg(&local, dev, pipe, buffer, len); } int submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer, int len, int interval, bool nonblock) { return _submit_int_msg(&local, dev, pipe, buffer, len, interval, nonblock); } /* U-Boot USB control interface */ int usb_lowlevel_init(int index, enum usb_init_type init, void **controller) { struct dwc2_priv *priv = &local; memset(priv, '\0', sizeof(*priv)); priv->root_hub_devnum = 0; priv->regs = (struct dwc2_core_regs *)CONFIG_USB_DWC2_REG_ADDR; priv->aligned_buffer = aligned_buffer_addr; priv->status_buffer = status_buffer_addr; /* board-dependant init */ if (board_usb_init(index, USB_INIT_HOST)) return -1; return dwc2_init_common(NULL, priv); } int usb_lowlevel_stop(int index) { dwc2_uninit_common(local.regs); return 0; } #endif #if CONFIG_IS_ENABLED(DM_USB) static int dwc2_submit_control_msg(struct udevice *dev, struct usb_device *udev, unsigned long pipe, void *buffer, int length, struct devrequest *setup) { struct dwc2_priv *priv = dev_get_priv(dev); debug("%s: dev='%s', udev=%p, udev->dev='%s', portnr=%d\n", __func__, dev->name, udev, udev->dev->name, udev->portnr); return _submit_control_msg(priv, udev, pipe, buffer, length, setup); } static int dwc2_submit_bulk_msg(struct udevice *dev, struct usb_device *udev, unsigned long pipe, void *buffer, int length) { struct dwc2_priv *priv = dev_get_priv(dev); debug("%s: dev='%s', udev=%p\n", __func__, dev->name, udev); return _submit_bulk_msg(priv, udev, pipe, buffer, length); } static int dwc2_submit_int_msg(struct udevice *dev, struct usb_device *udev, unsigned long pipe, void *buffer, int length, int interval, bool nonblock) { struct dwc2_priv *priv = dev_get_priv(dev); debug("%s: dev='%s', udev=%p\n", __func__, dev->name, udev); return _submit_int_msg(priv, udev, pipe, buffer, length, interval, nonblock); } static int dwc2_usb_ofdata_to_platdata(struct udevice *dev) { struct dwc2_priv *priv = dev_get_priv(dev); fdt_addr_t addr; addr = dev_read_addr(dev); if (addr == FDT_ADDR_T_NONE) return -EINVAL; priv->regs = (struct dwc2_core_regs *)addr; priv->oc_disable = dev_read_bool(dev, "disable-over-current"); priv->hnp_srp_disable = dev_read_bool(dev, "hnp-srp-disable"); return 0; } static int dwc2_setup_phy(struct udevice *dev) { struct dwc2_priv *priv = dev_get_priv(dev); int ret; ret = generic_phy_get_by_index(dev, 0, &priv->phy); if (ret) { if (ret == -ENOENT) return 0; /* no PHY, nothing to do */ dev_err(dev, "Failed to get USB PHY: %d.\n", ret); return ret; } ret = generic_phy_init(&priv->phy); if (ret) { dev_dbg(dev, "Failed to init USB PHY: %d.\n", ret); return ret; } ret = generic_phy_power_on(&priv->phy); if (ret) { dev_dbg(dev, "Failed to power on USB PHY: %d.\n", ret); generic_phy_exit(&priv->phy); return ret; } return 0; } static int dwc2_shutdown_phy(struct udevice *dev) { struct dwc2_priv *priv = dev_get_priv(dev); int ret; /* PHY is not valid when generic_phy_get_by_index() = -ENOENT */ if (!generic_phy_valid(&priv->phy)) return 0; /* no PHY, nothing to do */ ret = generic_phy_power_off(&priv->phy); if (ret) { dev_dbg(dev, "Failed to power off USB PHY: %d.\n", ret); return ret; } ret = generic_phy_exit(&priv->phy); if (ret) { dev_dbg(dev, "Failed to power off USB PHY: %d.\n", ret); return ret; } return 0; } static int dwc2_clk_init(struct udevice *dev) { struct dwc2_priv *priv = dev_get_priv(dev); int ret; ret = clk_get_bulk(dev, &priv->clks); if (ret == -ENOSYS || ret == -ENOENT) return 0; if (ret) return ret; ret = clk_enable_bulk(&priv->clks); if (ret) { clk_release_bulk(&priv->clks); return ret; } return 0; } static int dwc2_usb_probe(struct udevice *dev) { struct dwc2_priv *priv = dev_get_priv(dev); struct usb_bus_priv *bus_priv = dev_get_uclass_priv(dev); int ret; bus_priv->desc_before_addr = true; ret = dwc2_clk_init(dev); if (ret) return ret; ret = dwc2_setup_phy(dev); if (ret) return ret; return dwc2_init_common(dev, priv); } static int dwc2_usb_remove(struct udevice *dev) { struct dwc2_priv *priv = dev_get_priv(dev); int ret; ret = dwc_vbus_supply_exit(dev); if (ret) return ret; ret = dwc2_shutdown_phy(dev); if (ret) { dev_dbg(dev, "Failed to shutdown USB PHY: %d.\n", ret); return ret; } dwc2_uninit_common(priv->regs); reset_release_bulk(&priv->resets); clk_disable_bulk(&priv->clks); clk_release_bulk(&priv->clks); return 0; } struct dm_usb_ops dwc2_usb_ops = { .control = dwc2_submit_control_msg, .bulk = dwc2_submit_bulk_msg, .interrupt = dwc2_submit_int_msg, }; static const struct udevice_id dwc2_usb_ids[] = { { .compatible = "brcm,bcm2835-usb" }, { .compatible = "brcm,bcm2708-usb" }, { .compatible = "snps,dwc2" }, { } }; U_BOOT_DRIVER(usb_dwc2) = { .name = "dwc2_usb", .id = UCLASS_USB, .of_match = dwc2_usb_ids, .ofdata_to_platdata = dwc2_usb_ofdata_to_platdata, .probe = dwc2_usb_probe, .remove = dwc2_usb_remove, .ops = &dwc2_usb_ops, .priv_auto_alloc_size = sizeof(struct dwc2_priv), .flags = DM_FLAG_ALLOC_PRIV_DMA, }; #endif