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- // SPDX-License-Identifier: GPL-2.0+
- /*
- * drivers/usb/gadget/dwc2_udc_otg.c
- * Designware DWC2 on-chip full/high speed USB OTG 2.0 device controllers
- *
- * Copyright (C) 2008 for Samsung Electronics
- *
- * BSP Support for Samsung's UDC driver
- * available at:
- * git://git.kernel.org/pub/scm/linux/kernel/git/kki_ap/linux-2.6-samsung.git
- *
- * State machine bugfixes:
- * Marek Szyprowski <m.szyprowski@samsung.com>
- *
- * Ported to u-boot:
- * Marek Szyprowski <m.szyprowski@samsung.com>
- * Lukasz Majewski <l.majewski@samsumg.com>
- */
- #undef DEBUG
- #include <common.h>
- #include <clk.h>
- #include <dm.h>
- #include <generic-phy.h>
- #include <log.h>
- #include <malloc.h>
- #include <reset.h>
- #include <dm/device_compat.h>
- #include <dm/devres.h>
- #include <linux/bug.h>
- #include <linux/delay.h>
- #include <linux/errno.h>
- #include <linux/list.h>
- #include <linux/usb/ch9.h>
- #include <linux/usb/otg.h>
- #include <linux/usb/gadget.h>
- #include <phys2bus.h>
- #include <asm/byteorder.h>
- #include <asm/unaligned.h>
- #include <asm/io.h>
- #include <asm/mach-types.h>
- #include <power/regulator.h>
- #include "dwc2_udc_otg_regs.h"
- #include "dwc2_udc_otg_priv.h"
- /***********************************************************/
- #define OTG_DMA_MODE 1
- #define DEBUG_SETUP 0
- #define DEBUG_EP0 0
- #define DEBUG_ISR 0
- #define DEBUG_OUT_EP 0
- #define DEBUG_IN_EP 0
- #include <usb/dwc2_udc.h>
- #define EP0_CON 0
- #define EP_MASK 0xF
- static char *state_names[] = {
- "WAIT_FOR_SETUP",
- "DATA_STATE_XMIT",
- "DATA_STATE_NEED_ZLP",
- "WAIT_FOR_OUT_STATUS",
- "DATA_STATE_RECV",
- "WAIT_FOR_COMPLETE",
- "WAIT_FOR_OUT_COMPLETE",
- "WAIT_FOR_IN_COMPLETE",
- "WAIT_FOR_NULL_COMPLETE",
- };
- #define DRIVER_VERSION "15 March 2009"
- struct dwc2_udc *the_controller;
- static const char driver_name[] = "dwc2-udc";
- static const char ep0name[] = "ep0-control";
- /* Max packet size*/
- static unsigned int ep0_fifo_size = 64;
- static unsigned int ep_fifo_size = 512;
- static unsigned int ep_fifo_size2 = 1024;
- static int reset_available = 1;
- static struct usb_ctrlrequest *usb_ctrl;
- static dma_addr_t usb_ctrl_dma_addr;
- /*
- Local declarations.
- */
- static int dwc2_ep_enable(struct usb_ep *ep,
- const struct usb_endpoint_descriptor *);
- static int dwc2_ep_disable(struct usb_ep *ep);
- static struct usb_request *dwc2_alloc_request(struct usb_ep *ep,
- gfp_t gfp_flags);
- static void dwc2_free_request(struct usb_ep *ep, struct usb_request *);
- static int dwc2_queue(struct usb_ep *ep, struct usb_request *, gfp_t gfp_flags);
- static int dwc2_dequeue(struct usb_ep *ep, struct usb_request *);
- static int dwc2_fifo_status(struct usb_ep *ep);
- static void dwc2_fifo_flush(struct usb_ep *ep);
- static void dwc2_ep0_read(struct dwc2_udc *dev);
- static void dwc2_ep0_kick(struct dwc2_udc *dev, struct dwc2_ep *ep);
- static void dwc2_handle_ep0(struct dwc2_udc *dev);
- static int dwc2_ep0_write(struct dwc2_udc *dev);
- static int write_fifo_ep0(struct dwc2_ep *ep, struct dwc2_request *req);
- static void done(struct dwc2_ep *ep, struct dwc2_request *req, int status);
- static void stop_activity(struct dwc2_udc *dev,
- struct usb_gadget_driver *driver);
- static int udc_enable(struct dwc2_udc *dev);
- static void udc_set_address(struct dwc2_udc *dev, unsigned char address);
- static void reconfig_usbd(struct dwc2_udc *dev);
- static void set_max_pktsize(struct dwc2_udc *dev, enum usb_device_speed speed);
- static void nuke(struct dwc2_ep *ep, int status);
- static int dwc2_udc_set_halt(struct usb_ep *_ep, int value);
- static void dwc2_udc_set_nak(struct dwc2_ep *ep);
- void set_udc_gadget_private_data(void *p)
- {
- debug_cond(DEBUG_SETUP != 0,
- "%s: the_controller: 0x%p, p: 0x%p\n", __func__,
- the_controller, p);
- the_controller->gadget.dev.device_data = p;
- }
- void *get_udc_gadget_private_data(struct usb_gadget *gadget)
- {
- return gadget->dev.device_data;
- }
- static struct usb_ep_ops dwc2_ep_ops = {
- .enable = dwc2_ep_enable,
- .disable = dwc2_ep_disable,
- .alloc_request = dwc2_alloc_request,
- .free_request = dwc2_free_request,
- .queue = dwc2_queue,
- .dequeue = dwc2_dequeue,
- .set_halt = dwc2_udc_set_halt,
- .fifo_status = dwc2_fifo_status,
- .fifo_flush = dwc2_fifo_flush,
- };
- #define create_proc_files() do {} while (0)
- #define remove_proc_files() do {} while (0)
- /***********************************************************/
- struct dwc2_usbotg_reg *reg;
- bool dfu_usb_get_reset(void)
- {
- return !!(readl(®->gintsts) & INT_RESET);
- }
- __weak void otg_phy_init(struct dwc2_udc *dev) {}
- __weak void otg_phy_off(struct dwc2_udc *dev) {}
- /***********************************************************/
- #include "dwc2_udc_otg_xfer_dma.c"
- /*
- * udc_disable - disable USB device controller
- */
- static void udc_disable(struct dwc2_udc *dev)
- {
- debug_cond(DEBUG_SETUP != 0, "%s: %p\n", __func__, dev);
- udc_set_address(dev, 0);
- dev->ep0state = WAIT_FOR_SETUP;
- dev->gadget.speed = USB_SPEED_UNKNOWN;
- dev->usb_address = 0;
- otg_phy_off(dev);
- }
- /*
- * udc_reinit - initialize software state
- */
- static void udc_reinit(struct dwc2_udc *dev)
- {
- unsigned int i;
- debug_cond(DEBUG_SETUP != 0, "%s: %p\n", __func__, dev);
- /* device/ep0 records init */
- INIT_LIST_HEAD(&dev->gadget.ep_list);
- INIT_LIST_HEAD(&dev->gadget.ep0->ep_list);
- dev->ep0state = WAIT_FOR_SETUP;
- /* basic endpoint records init */
- for (i = 0; i < DWC2_MAX_ENDPOINTS; i++) {
- struct dwc2_ep *ep = &dev->ep[i];
- if (i != 0)
- list_add_tail(&ep->ep.ep_list, &dev->gadget.ep_list);
- ep->desc = 0;
- ep->stopped = 0;
- INIT_LIST_HEAD(&ep->queue);
- ep->pio_irqs = 0;
- }
- /* the rest was statically initialized, and is read-only */
- }
- #define BYTES2MAXP(x) (x / 8)
- #define MAXP2BYTES(x) (x * 8)
- /* until it's enabled, this UDC should be completely invisible
- * to any USB host.
- */
- static int udc_enable(struct dwc2_udc *dev)
- {
- debug_cond(DEBUG_SETUP != 0, "%s: %p\n", __func__, dev);
- otg_phy_init(dev);
- reconfig_usbd(dev);
- debug_cond(DEBUG_SETUP != 0,
- "DWC2 USB 2.0 OTG Controller Core Initialized : 0x%x\n",
- readl(®->gintmsk));
- dev->gadget.speed = USB_SPEED_UNKNOWN;
- return 0;
- }
- #if !CONFIG_IS_ENABLED(DM_USB_GADGET)
- /*
- Register entry point for the peripheral controller driver.
- */
- int usb_gadget_register_driver(struct usb_gadget_driver *driver)
- {
- struct dwc2_udc *dev = the_controller;
- int retval = 0;
- unsigned long flags = 0;
- debug_cond(DEBUG_SETUP != 0, "%s: %s\n", __func__, "no name");
- if (!driver
- || (driver->speed != USB_SPEED_FULL
- && driver->speed != USB_SPEED_HIGH)
- || !driver->bind || !driver->disconnect || !driver->setup)
- return -EINVAL;
- if (!dev)
- return -ENODEV;
- if (dev->driver)
- return -EBUSY;
- spin_lock_irqsave(&dev->lock, flags);
- /* first hook up the driver ... */
- dev->driver = driver;
- spin_unlock_irqrestore(&dev->lock, flags);
- if (retval) { /* TODO */
- printf("target device_add failed, error %d\n", retval);
- return retval;
- }
- retval = driver->bind(&dev->gadget);
- if (retval) {
- debug_cond(DEBUG_SETUP != 0,
- "%s: bind to driver --> error %d\n",
- dev->gadget.name, retval);
- dev->driver = 0;
- return retval;
- }
- enable_irq(IRQ_OTG);
- debug_cond(DEBUG_SETUP != 0,
- "Registered gadget driver %s\n", dev->gadget.name);
- udc_enable(dev);
- return 0;
- }
- /*
- * Unregister entry point for the peripheral controller driver.
- */
- int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
- {
- struct dwc2_udc *dev = the_controller;
- unsigned long flags = 0;
- if (!dev)
- return -ENODEV;
- if (!driver || driver != dev->driver)
- return -EINVAL;
- spin_lock_irqsave(&dev->lock, flags);
- dev->driver = 0;
- stop_activity(dev, driver);
- spin_unlock_irqrestore(&dev->lock, flags);
- driver->unbind(&dev->gadget);
- disable_irq(IRQ_OTG);
- udc_disable(dev);
- return 0;
- }
- #else /* !CONFIG_IS_ENABLED(DM_USB_GADGET) */
- static int dwc2_gadget_start(struct usb_gadget *g,
- struct usb_gadget_driver *driver)
- {
- struct dwc2_udc *dev = the_controller;
- debug_cond(DEBUG_SETUP != 0, "%s: %s\n", __func__, "no name");
- if (!driver ||
- (driver->speed != USB_SPEED_FULL &&
- driver->speed != USB_SPEED_HIGH) ||
- !driver->bind || !driver->disconnect || !driver->setup)
- return -EINVAL;
- if (!dev)
- return -ENODEV;
- if (dev->driver)
- return -EBUSY;
- /* first hook up the driver ... */
- dev->driver = driver;
- debug_cond(DEBUG_SETUP != 0,
- "Registered gadget driver %s\n", dev->gadget.name);
- return udc_enable(dev);
- }
- static int dwc2_gadget_stop(struct usb_gadget *g)
- {
- struct dwc2_udc *dev = the_controller;
- if (!dev)
- return -ENODEV;
- if (!dev->driver)
- return -EINVAL;
- dev->driver = 0;
- stop_activity(dev, dev->driver);
- udc_disable(dev);
- return 0;
- }
- #endif /* !CONFIG_IS_ENABLED(DM_USB_GADGET) */
- /*
- * done - retire a request; caller blocked irqs
- */
- static void done(struct dwc2_ep *ep, struct dwc2_request *req, int status)
- {
- unsigned int stopped = ep->stopped;
- debug("%s: %s %p, req = %p, stopped = %d\n",
- __func__, ep->ep.name, ep, &req->req, stopped);
- list_del_init(&req->queue);
- if (likely(req->req.status == -EINPROGRESS))
- req->req.status = status;
- else
- status = req->req.status;
- if (status && status != -ESHUTDOWN) {
- debug("complete %s req %p stat %d len %u/%u\n",
- ep->ep.name, &req->req, status,
- req->req.actual, req->req.length);
- }
- /* don't modify queue heads during completion callback */
- ep->stopped = 1;
- #ifdef DEBUG
- printf("calling complete callback\n");
- {
- int i, len = req->req.length;
- printf("pkt[%d] = ", req->req.length);
- if (len > 64)
- len = 64;
- for (i = 0; i < len; i++) {
- printf("%02x", ((u8 *)req->req.buf)[i]);
- if ((i & 7) == 7)
- printf(" ");
- }
- printf("\n");
- }
- #endif
- spin_unlock(&ep->dev->lock);
- req->req.complete(&ep->ep, &req->req);
- spin_lock(&ep->dev->lock);
- debug("callback completed\n");
- ep->stopped = stopped;
- }
- /*
- * nuke - dequeue ALL requests
- */
- static void nuke(struct dwc2_ep *ep, int status)
- {
- struct dwc2_request *req;
- debug("%s: %s %p\n", __func__, ep->ep.name, ep);
- /* called with irqs blocked */
- while (!list_empty(&ep->queue)) {
- req = list_entry(ep->queue.next, struct dwc2_request, queue);
- done(ep, req, status);
- }
- }
- static void stop_activity(struct dwc2_udc *dev,
- struct usb_gadget_driver *driver)
- {
- int i;
- /* don't disconnect drivers more than once */
- if (dev->gadget.speed == USB_SPEED_UNKNOWN)
- driver = 0;
- dev->gadget.speed = USB_SPEED_UNKNOWN;
- /* prevent new request submissions, kill any outstanding requests */
- for (i = 0; i < DWC2_MAX_ENDPOINTS; i++) {
- struct dwc2_ep *ep = &dev->ep[i];
- ep->stopped = 1;
- nuke(ep, -ESHUTDOWN);
- }
- /* report disconnect; the driver is already quiesced */
- if (driver) {
- spin_unlock(&dev->lock);
- driver->disconnect(&dev->gadget);
- spin_lock(&dev->lock);
- }
- /* re-init driver-visible data structures */
- udc_reinit(dev);
- }
- static void reconfig_usbd(struct dwc2_udc *dev)
- {
- /* 2. Soft-reset OTG Core and then unreset again. */
- int i;
- unsigned int uTemp = writel(CORE_SOFT_RESET, ®->grstctl);
- uint32_t dflt_gusbcfg;
- uint32_t rx_fifo_sz, tx_fifo_sz, np_tx_fifo_sz;
- u32 max_hw_ep;
- int pdata_hw_ep;
- debug("Reseting OTG controller\n");
- dflt_gusbcfg =
- 0<<15 /* PHY Low Power Clock sel*/
- |1<<14 /* Non-Periodic TxFIFO Rewind Enable*/
- |0x5<<10 /* Turnaround time*/
- |0<<9 | 0<<8 /* [0:HNP disable,1:HNP enable][ 0:SRP disable*/
- /* 1:SRP enable] H1= 1,1*/
- |0<<7 /* Ulpi DDR sel*/
- |0<<6 /* 0: high speed utmi+, 1: full speed serial*/
- |0<<4 /* 0: utmi+, 1:ulpi*/
- #ifdef CONFIG_USB_GADGET_DWC2_OTG_PHY_BUS_WIDTH_8
- |0<<3 /* phy i/f 0:8bit, 1:16bit*/
- #else
- |1<<3 /* phy i/f 0:8bit, 1:16bit*/
- #endif
- |0x7<<0; /* HS/FS Timeout**/
- if (dev->pdata->usb_gusbcfg)
- dflt_gusbcfg = dev->pdata->usb_gusbcfg;
- writel(dflt_gusbcfg, ®->gusbcfg);
- /* 3. Put the OTG device core in the disconnected state.*/
- uTemp = readl(®->dctl);
- uTemp |= SOFT_DISCONNECT;
- writel(uTemp, ®->dctl);
- udelay(20);
- /* 4. Make the OTG device core exit from the disconnected state.*/
- uTemp = readl(®->dctl);
- uTemp = uTemp & ~SOFT_DISCONNECT;
- writel(uTemp, ®->dctl);
- /* 5. Configure OTG Core to initial settings of device mode.*/
- /* [][1: full speed(30Mhz) 0:high speed]*/
- writel(EP_MISS_CNT(1) | DEV_SPEED_HIGH_SPEED_20, ®->dcfg);
- mdelay(1);
- /* 6. Unmask the core interrupts*/
- writel(GINTMSK_INIT, ®->gintmsk);
- /* 7. Set NAK bit of EP0, EP1, EP2*/
- writel(DEPCTL_EPDIS|DEPCTL_SNAK, ®->out_endp[EP0_CON].doepctl);
- writel(DEPCTL_EPDIS|DEPCTL_SNAK, ®->in_endp[EP0_CON].diepctl);
- for (i = 1; i < DWC2_MAX_ENDPOINTS; i++) {
- writel(DEPCTL_EPDIS|DEPCTL_SNAK, ®->out_endp[i].doepctl);
- writel(DEPCTL_EPDIS|DEPCTL_SNAK, ®->in_endp[i].diepctl);
- }
- /* 8. Unmask EPO interrupts*/
- writel(((1 << EP0_CON) << DAINT_OUT_BIT)
- | (1 << EP0_CON), ®->daintmsk);
- /* 9. Unmask device OUT EP common interrupts*/
- writel(DOEPMSK_INIT, ®->doepmsk);
- /* 10. Unmask device IN EP common interrupts*/
- writel(DIEPMSK_INIT, ®->diepmsk);
- rx_fifo_sz = RX_FIFO_SIZE;
- np_tx_fifo_sz = NPTX_FIFO_SIZE;
- tx_fifo_sz = PTX_FIFO_SIZE;
- if (dev->pdata->rx_fifo_sz)
- rx_fifo_sz = dev->pdata->rx_fifo_sz;
- if (dev->pdata->np_tx_fifo_sz)
- np_tx_fifo_sz = dev->pdata->np_tx_fifo_sz;
- if (dev->pdata->tx_fifo_sz)
- tx_fifo_sz = dev->pdata->tx_fifo_sz;
- /* 11. Set Rx FIFO Size (in 32-bit words) */
- writel(rx_fifo_sz, ®->grxfsiz);
- /* 12. Set Non Periodic Tx FIFO Size */
- writel((np_tx_fifo_sz << 16) | rx_fifo_sz,
- ®->gnptxfsiz);
- /* retrieve the number of IN Endpoints (excluding ep0) */
- max_hw_ep = (readl(®->ghwcfg4) & GHWCFG4_NUM_IN_EPS_MASK) >>
- GHWCFG4_NUM_IN_EPS_SHIFT;
- pdata_hw_ep = dev->pdata->tx_fifo_sz_nb;
- /* tx_fifo_sz_nb should equal to number of IN Endpoint */
- if (pdata_hw_ep && max_hw_ep != pdata_hw_ep)
- pr_warn("Got %d hw endpoint but %d tx-fifo-size in array !!\n",
- max_hw_ep, pdata_hw_ep);
- for (i = 0; i < max_hw_ep; i++) {
- if (pdata_hw_ep)
- tx_fifo_sz = dev->pdata->tx_fifo_sz_array[i];
- writel((rx_fifo_sz + np_tx_fifo_sz + (tx_fifo_sz * i)) |
- tx_fifo_sz << 16, ®->dieptxf[i]);
- }
- /* Flush the RX FIFO */
- writel(RX_FIFO_FLUSH, ®->grstctl);
- while (readl(®->grstctl) & RX_FIFO_FLUSH)
- debug("%s: waiting for DWC2_UDC_OTG_GRSTCTL\n", __func__);
- /* Flush all the Tx FIFO's */
- writel(TX_FIFO_FLUSH_ALL, ®->grstctl);
- writel(TX_FIFO_FLUSH_ALL | TX_FIFO_FLUSH, ®->grstctl);
- while (readl(®->grstctl) & TX_FIFO_FLUSH)
- debug("%s: waiting for DWC2_UDC_OTG_GRSTCTL\n", __func__);
- /* 13. Clear NAK bit of EP0, EP1, EP2*/
- /* For Slave mode*/
- /* EP0: Control OUT */
- writel(DEPCTL_EPDIS | DEPCTL_CNAK,
- ®->out_endp[EP0_CON].doepctl);
- /* 14. Initialize OTG Link Core.*/
- writel(GAHBCFG_INIT, ®->gahbcfg);
- }
- static void set_max_pktsize(struct dwc2_udc *dev, enum usb_device_speed speed)
- {
- unsigned int ep_ctrl;
- int i;
- if (speed == USB_SPEED_HIGH) {
- ep0_fifo_size = 64;
- ep_fifo_size = 512;
- ep_fifo_size2 = 1024;
- dev->gadget.speed = USB_SPEED_HIGH;
- } else {
- ep0_fifo_size = 64;
- ep_fifo_size = 64;
- ep_fifo_size2 = 64;
- dev->gadget.speed = USB_SPEED_FULL;
- }
- dev->ep[0].ep.maxpacket = ep0_fifo_size;
- for (i = 1; i < DWC2_MAX_ENDPOINTS; i++)
- dev->ep[i].ep.maxpacket = ep_fifo_size;
- /* EP0 - Control IN (64 bytes)*/
- ep_ctrl = readl(®->in_endp[EP0_CON].diepctl);
- writel(ep_ctrl|(0<<0), ®->in_endp[EP0_CON].diepctl);
- /* EP0 - Control OUT (64 bytes)*/
- ep_ctrl = readl(®->out_endp[EP0_CON].doepctl);
- writel(ep_ctrl|(0<<0), ®->out_endp[EP0_CON].doepctl);
- }
- static int dwc2_ep_enable(struct usb_ep *_ep,
- const struct usb_endpoint_descriptor *desc)
- {
- struct dwc2_ep *ep;
- struct dwc2_udc *dev;
- unsigned long flags = 0;
- debug("%s: %p\n", __func__, _ep);
- ep = container_of(_ep, struct dwc2_ep, ep);
- if (!_ep || !desc || ep->desc || _ep->name == ep0name
- || desc->bDescriptorType != USB_DT_ENDPOINT
- || ep->bEndpointAddress != desc->bEndpointAddress
- || ep_maxpacket(ep) <
- le16_to_cpu(get_unaligned(&desc->wMaxPacketSize))) {
- debug("%s: bad ep or descriptor\n", __func__);
- return -EINVAL;
- }
- /* xfer types must match, except that interrupt ~= bulk */
- if (ep->bmAttributes != desc->bmAttributes
- && ep->bmAttributes != USB_ENDPOINT_XFER_BULK
- && desc->bmAttributes != USB_ENDPOINT_XFER_INT) {
- debug("%s: %s type mismatch\n", __func__, _ep->name);
- return -EINVAL;
- }
- /* hardware _could_ do smaller, but driver doesn't */
- if ((desc->bmAttributes == USB_ENDPOINT_XFER_BULK &&
- le16_to_cpu(get_unaligned(&desc->wMaxPacketSize)) >
- ep_maxpacket(ep)) || !get_unaligned(&desc->wMaxPacketSize)) {
- debug("%s: bad %s maxpacket\n", __func__, _ep->name);
- return -ERANGE;
- }
- dev = ep->dev;
- if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) {
- debug("%s: bogus device state\n", __func__);
- return -ESHUTDOWN;
- }
- ep->stopped = 0;
- ep->desc = desc;
- ep->pio_irqs = 0;
- ep->ep.maxpacket = le16_to_cpu(get_unaligned(&desc->wMaxPacketSize));
- /* Reset halt state */
- dwc2_udc_set_nak(ep);
- dwc2_udc_set_halt(_ep, 0);
- spin_lock_irqsave(&ep->dev->lock, flags);
- dwc2_udc_ep_activate(ep);
- spin_unlock_irqrestore(&ep->dev->lock, flags);
- debug("%s: enabled %s, stopped = %d, maxpacket = %d\n",
- __func__, _ep->name, ep->stopped, ep->ep.maxpacket);
- return 0;
- }
- /*
- * Disable EP
- */
- static int dwc2_ep_disable(struct usb_ep *_ep)
- {
- struct dwc2_ep *ep;
- unsigned long flags = 0;
- debug("%s: %p\n", __func__, _ep);
- ep = container_of(_ep, struct dwc2_ep, ep);
- if (!_ep || !ep->desc) {
- debug("%s: %s not enabled\n", __func__,
- _ep ? ep->ep.name : NULL);
- return -EINVAL;
- }
- spin_lock_irqsave(&ep->dev->lock, flags);
- /* Nuke all pending requests */
- nuke(ep, -ESHUTDOWN);
- ep->desc = 0;
- ep->stopped = 1;
- spin_unlock_irqrestore(&ep->dev->lock, flags);
- debug("%s: disabled %s\n", __func__, _ep->name);
- return 0;
- }
- static struct usb_request *dwc2_alloc_request(struct usb_ep *ep,
- gfp_t gfp_flags)
- {
- struct dwc2_request *req;
- debug("%s: %s %p\n", __func__, ep->name, ep);
- req = memalign(CONFIG_SYS_CACHELINE_SIZE, sizeof(*req));
- if (!req)
- return 0;
- memset(req, 0, sizeof *req);
- INIT_LIST_HEAD(&req->queue);
- return &req->req;
- }
- static void dwc2_free_request(struct usb_ep *ep, struct usb_request *_req)
- {
- struct dwc2_request *req;
- debug("%s: %p\n", __func__, ep);
- req = container_of(_req, struct dwc2_request, req);
- WARN_ON(!list_empty(&req->queue));
- kfree(req);
- }
- /* dequeue JUST ONE request */
- static int dwc2_dequeue(struct usb_ep *_ep, struct usb_request *_req)
- {
- struct dwc2_ep *ep;
- struct dwc2_request *req;
- unsigned long flags = 0;
- debug("%s: %p\n", __func__, _ep);
- ep = container_of(_ep, struct dwc2_ep, ep);
- if (!_ep || ep->ep.name == ep0name)
- return -EINVAL;
- spin_lock_irqsave(&ep->dev->lock, flags);
- /* make sure it's actually queued on this endpoint */
- list_for_each_entry(req, &ep->queue, queue) {
- if (&req->req == _req)
- break;
- }
- if (&req->req != _req) {
- spin_unlock_irqrestore(&ep->dev->lock, flags);
- return -EINVAL;
- }
- done(ep, req, -ECONNRESET);
- spin_unlock_irqrestore(&ep->dev->lock, flags);
- return 0;
- }
- /*
- * Return bytes in EP FIFO
- */
- static int dwc2_fifo_status(struct usb_ep *_ep)
- {
- int count = 0;
- struct dwc2_ep *ep;
- ep = container_of(_ep, struct dwc2_ep, ep);
- if (!_ep) {
- debug("%s: bad ep\n", __func__);
- return -ENODEV;
- }
- debug("%s: %d\n", __func__, ep_index(ep));
- /* LPD can't report unclaimed bytes from IN fifos */
- if (ep_is_in(ep))
- return -EOPNOTSUPP;
- return count;
- }
- /*
- * Flush EP FIFO
- */
- static void dwc2_fifo_flush(struct usb_ep *_ep)
- {
- struct dwc2_ep *ep;
- ep = container_of(_ep, struct dwc2_ep, ep);
- if (unlikely(!_ep || (!ep->desc && ep->ep.name != ep0name))) {
- debug("%s: bad ep\n", __func__);
- return;
- }
- debug("%s: %d\n", __func__, ep_index(ep));
- }
- static const struct usb_gadget_ops dwc2_udc_ops = {
- /* current versions must always be self-powered */
- #if CONFIG_IS_ENABLED(DM_USB_GADGET)
- .udc_start = dwc2_gadget_start,
- .udc_stop = dwc2_gadget_stop,
- #endif
- };
- static struct dwc2_udc memory = {
- .usb_address = 0,
- .gadget = {
- .ops = &dwc2_udc_ops,
- .ep0 = &memory.ep[0].ep,
- .name = driver_name,
- },
- /* control endpoint */
- .ep[0] = {
- .ep = {
- .name = ep0name,
- .ops = &dwc2_ep_ops,
- .maxpacket = EP0_FIFO_SIZE,
- },
- .dev = &memory,
- .bEndpointAddress = 0,
- .bmAttributes = 0,
- .ep_type = ep_control,
- },
- /* first group of endpoints */
- .ep[1] = {
- .ep = {
- .name = "ep1in-bulk",
- .ops = &dwc2_ep_ops,
- .maxpacket = EP_FIFO_SIZE,
- },
- .dev = &memory,
- .bEndpointAddress = USB_DIR_IN | 1,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- .ep_type = ep_bulk_out,
- .fifo_num = 1,
- },
- .ep[2] = {
- .ep = {
- .name = "ep2out-bulk",
- .ops = &dwc2_ep_ops,
- .maxpacket = EP_FIFO_SIZE,
- },
- .dev = &memory,
- .bEndpointAddress = USB_DIR_OUT | 2,
- .bmAttributes = USB_ENDPOINT_XFER_BULK,
- .ep_type = ep_bulk_in,
- .fifo_num = 2,
- },
- .ep[3] = {
- .ep = {
- .name = "ep3in-int",
- .ops = &dwc2_ep_ops,
- .maxpacket = EP_FIFO_SIZE,
- },
- .dev = &memory,
- .bEndpointAddress = USB_DIR_IN | 3,
- .bmAttributes = USB_ENDPOINT_XFER_INT,
- .ep_type = ep_interrupt,
- .fifo_num = 3,
- },
- };
- /*
- * probe - binds to the platform device
- */
- int dwc2_udc_probe(struct dwc2_plat_otg_data *pdata)
- {
- struct dwc2_udc *dev = &memory;
- int retval = 0;
- debug("%s: %p\n", __func__, pdata);
- dev->pdata = pdata;
- reg = (struct dwc2_usbotg_reg *)pdata->regs_otg;
- dev->gadget.is_dualspeed = 1; /* Hack only*/
- dev->gadget.is_otg = 0;
- dev->gadget.is_a_peripheral = 0;
- dev->gadget.b_hnp_enable = 0;
- dev->gadget.a_hnp_support = 0;
- dev->gadget.a_alt_hnp_support = 0;
- the_controller = dev;
- usb_ctrl = memalign(CONFIG_SYS_CACHELINE_SIZE,
- ROUND(sizeof(struct usb_ctrlrequest),
- CONFIG_SYS_CACHELINE_SIZE));
- if (!usb_ctrl) {
- pr_err("No memory available for UDC!\n");
- return -ENOMEM;
- }
- usb_ctrl_dma_addr = (dma_addr_t) usb_ctrl;
- udc_reinit(dev);
- return retval;
- }
- int dwc2_udc_handle_interrupt(void)
- {
- u32 intr_status = readl(®->gintsts);
- u32 gintmsk = readl(®->gintmsk);
- if (intr_status & gintmsk)
- return dwc2_udc_irq(1, (void *)the_controller);
- return 0;
- }
- #if !CONFIG_IS_ENABLED(DM_USB_GADGET)
- int usb_gadget_handle_interrupts(int index)
- {
- return dwc2_udc_handle_interrupt();
- }
- #else /* CONFIG_IS_ENABLED(DM_USB_GADGET) */
- struct dwc2_priv_data {
- struct clk_bulk clks;
- struct reset_ctl_bulk resets;
- struct phy_bulk phys;
- struct udevice *usb33d_supply;
- };
- int dm_usb_gadget_handle_interrupts(struct udevice *dev)
- {
- return dwc2_udc_handle_interrupt();
- }
- static int dwc2_phy_setup(struct udevice *dev, struct phy_bulk *phys)
- {
- int ret;
- ret = generic_phy_get_bulk(dev, phys);
- if (ret)
- return ret;
- ret = generic_phy_init_bulk(phys);
- if (ret)
- return ret;
- ret = generic_phy_power_on_bulk(phys);
- if (ret)
- generic_phy_exit_bulk(phys);
- return ret;
- }
- static void dwc2_phy_shutdown(struct udevice *dev, struct phy_bulk *phys)
- {
- generic_phy_power_off_bulk(phys);
- generic_phy_exit_bulk(phys);
- }
- static int dwc2_udc_otg_of_to_plat(struct udevice *dev)
- {
- struct dwc2_plat_otg_data *plat = dev_get_plat(dev);
- ulong drvdata;
- void (*set_params)(struct dwc2_plat_otg_data *data);
- int ret;
- if (usb_get_dr_mode(dev_ofnode(dev)) != USB_DR_MODE_PERIPHERAL &&
- usb_get_dr_mode(dev_ofnode(dev)) != USB_DR_MODE_OTG) {
- dev_dbg(dev, "Invalid mode\n");
- return -ENODEV;
- }
- plat->regs_otg = dev_read_addr(dev);
- plat->rx_fifo_sz = dev_read_u32_default(dev, "g-rx-fifo-size", 0);
- plat->np_tx_fifo_sz = dev_read_u32_default(dev, "g-np-tx-fifo-size", 0);
- plat->tx_fifo_sz_nb =
- dev_read_size(dev, "g-tx-fifo-size") / sizeof(u32);
- if (plat->tx_fifo_sz_nb > DWC2_MAX_HW_ENDPOINTS)
- plat->tx_fifo_sz_nb = DWC2_MAX_HW_ENDPOINTS;
- if (plat->tx_fifo_sz_nb) {
- ret = dev_read_u32_array(dev, "g-tx-fifo-size",
- plat->tx_fifo_sz_array,
- plat->tx_fifo_sz_nb);
- if (ret)
- return ret;
- }
- plat->force_b_session_valid =
- dev_read_bool(dev, "u-boot,force-b-session-valid");
- plat->force_vbus_detection =
- dev_read_bool(dev, "u-boot,force-vbus-detection");
- /* force plat according compatible */
- drvdata = dev_get_driver_data(dev);
- if (drvdata) {
- set_params = (void *)drvdata;
- set_params(plat);
- }
- return 0;
- }
- static void dwc2_set_stm32mp1_hsotg_params(struct dwc2_plat_otg_data *p)
- {
- p->activate_stm_id_vb_detection = true;
- p->usb_gusbcfg =
- 0 << 15 /* PHY Low Power Clock sel*/
- | 0x9 << 10 /* USB Turnaround time (0x9 for HS phy) */
- | 0 << 9 /* [0:HNP disable,1:HNP enable]*/
- | 0 << 8 /* [0:SRP disable 1:SRP enable]*/
- | 0 << 6 /* 0: high speed utmi+, 1: full speed serial*/
- | 0x7 << 0; /* FS timeout calibration**/
- if (p->force_b_session_valid)
- p->usb_gusbcfg |= 1 << 30; /* FDMOD: Force device mode */
- }
- static int dwc2_udc_otg_reset_init(struct udevice *dev,
- struct reset_ctl_bulk *resets)
- {
- int ret;
- ret = reset_get_bulk(dev, resets);
- if (ret == -ENOTSUPP || ret == -ENOENT)
- return 0;
- if (ret)
- return ret;
- ret = reset_assert_bulk(resets);
- if (!ret) {
- udelay(2);
- ret = reset_deassert_bulk(resets);
- }
- if (ret) {
- reset_release_bulk(resets);
- return ret;
- }
- return 0;
- }
- static int dwc2_udc_otg_clk_init(struct udevice *dev,
- struct clk_bulk *clks)
- {
- int ret;
- ret = clk_get_bulk(dev, clks);
- if (ret == -ENOSYS)
- return 0;
- if (ret)
- return ret;
- ret = clk_enable_bulk(clks);
- if (ret) {
- clk_release_bulk(clks);
- return ret;
- }
- return 0;
- }
- static int dwc2_udc_otg_probe(struct udevice *dev)
- {
- struct dwc2_plat_otg_data *plat = dev_get_plat(dev);
- struct dwc2_priv_data *priv = dev_get_priv(dev);
- struct dwc2_usbotg_reg *usbotg_reg =
- (struct dwc2_usbotg_reg *)plat->regs_otg;
- int ret;
- ret = dwc2_udc_otg_clk_init(dev, &priv->clks);
- if (ret)
- return ret;
- ret = dwc2_udc_otg_reset_init(dev, &priv->resets);
- if (ret)
- return ret;
- ret = dwc2_phy_setup(dev, &priv->phys);
- if (ret)
- return ret;
- if (plat->activate_stm_id_vb_detection) {
- if (CONFIG_IS_ENABLED(DM_REGULATOR) &&
- (!plat->force_b_session_valid ||
- plat->force_vbus_detection)) {
- ret = device_get_supply_regulator(dev, "usb33d-supply",
- &priv->usb33d_supply);
- if (ret) {
- dev_err(dev, "can't get voltage level detector supply\n");
- return ret;
- }
- ret = regulator_set_enable(priv->usb33d_supply, true);
- if (ret) {
- dev_err(dev, "can't enable voltage level detector supply\n");
- return ret;
- }
- }
- if (plat->force_b_session_valid &&
- !plat->force_vbus_detection) {
- /* Override VBUS detection: enable then value*/
- setbits_le32(&usbotg_reg->gotgctl, VB_VALOEN);
- setbits_le32(&usbotg_reg->gotgctl, VB_VALOVAL);
- } else {
- /* Enable VBUS sensing */
- setbits_le32(&usbotg_reg->ggpio,
- GGPIO_STM32_OTG_GCCFG_VBDEN);
- }
- if (plat->force_b_session_valid) {
- /* Override B session bits: enable then value */
- setbits_le32(&usbotg_reg->gotgctl, A_VALOEN | B_VALOEN);
- setbits_le32(&usbotg_reg->gotgctl,
- A_VALOVAL | B_VALOVAL);
- } else {
- /* Enable ID detection */
- setbits_le32(&usbotg_reg->ggpio,
- GGPIO_STM32_OTG_GCCFG_IDEN);
- }
- }
- ret = dwc2_udc_probe(plat);
- if (ret)
- return ret;
- the_controller->driver = 0;
- ret = usb_add_gadget_udc((struct device *)dev, &the_controller->gadget);
- return ret;
- }
- static int dwc2_udc_otg_remove(struct udevice *dev)
- {
- struct dwc2_priv_data *priv = dev_get_priv(dev);
- usb_del_gadget_udc(&the_controller->gadget);
- reset_release_bulk(&priv->resets);
- clk_release_bulk(&priv->clks);
- dwc2_phy_shutdown(dev, &priv->phys);
- return dm_scan_fdt_dev(dev);
- }
- static const struct udevice_id dwc2_udc_otg_ids[] = {
- { .compatible = "snps,dwc2" },
- { .compatible = "brcm,bcm2835-usb" },
- { .compatible = "st,stm32mp1-hsotg",
- .data = (ulong)dwc2_set_stm32mp1_hsotg_params },
- {},
- };
- U_BOOT_DRIVER(dwc2_udc_otg) = {
- .name = "dwc2-udc-otg",
- .id = UCLASS_USB_GADGET_GENERIC,
- .of_match = dwc2_udc_otg_ids,
- .of_to_plat = dwc2_udc_otg_of_to_plat,
- .probe = dwc2_udc_otg_probe,
- .remove = dwc2_udc_otg_remove,
- .plat_auto = sizeof(struct dwc2_plat_otg_data),
- .priv_auto = sizeof(struct dwc2_priv_data),
- };
- int dwc2_udc_B_session_valid(struct udevice *dev)
- {
- struct dwc2_plat_otg_data *plat = dev_get_plat(dev);
- struct dwc2_usbotg_reg *usbotg_reg =
- (struct dwc2_usbotg_reg *)plat->regs_otg;
- return readl(&usbotg_reg->gotgctl) & B_SESSION_VALID;
- }
- #endif /* CONFIG_IS_ENABLED(DM_USB_GADGET) */
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