drivers/usb/eth/usb_ether.c - uboot-imx - Git at Google

 // SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright (c) 2011 The Chromium OS Authors.
  */

 #include <common.h>
 #include <dm.h>
 #include <errno.h>
 #include <malloc.h>
 #include <usb.h>
 #include <dm/device-internal.h>

 #include "usb_ether.h"

 #ifdef CONFIG_DM_ETH

 #define USB_BULK_RECV_TIMEOUT 500

 int usb_ether_register(struct udevice *dev, struct ueth_data *ueth, int rxsize)
 {
 	struct usb_device *udev = dev_get_parent_priv(dev);
 	struct usb_interface_descriptor *iface_desc;
 	bool ep_in_found = false, ep_out_found = false;
 	struct usb_interface *iface;
 	const int ifnum = 0; /* Always use interface 0 */
 	int ret, i;

 	iface = &udev->config.if_desc[ifnum];
 	iface_desc = &udev->config.if_desc[ifnum].desc;

 	/* Initialize the ueth_data structure with some useful info */
 	ueth->ifnum = ifnum;
 	ueth->subclass = iface_desc->bInterfaceSubClass;
 	ueth->protocol = iface_desc->bInterfaceProtocol;

 	/*
 	 * We are expecting a minimum of 3 endpoints - in, out (bulk), and int.
 	 * We will ignore any others.
 	 */
 	for (i = 0; i < iface_desc->bNumEndpoints; i++) {
 		int ep_addr = iface->ep_desc[i].bEndpointAddress;

 		/* is it an BULK endpoint? */
 		if ((iface->ep_desc[i].bmAttributes &
 		     USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_BULK) {
 			if (ep_addr & USB_DIR_IN && !ep_in_found) {
 				ueth->ep_in = ep_addr &
 					USB_ENDPOINT_NUMBER_MASK;
 				ep_in_found = true;
 			} else if (!(ep_addr & USB_DIR_IN) && !ep_out_found) {
 				ueth->ep_out = ep_addr &
 					USB_ENDPOINT_NUMBER_MASK;
 				ep_out_found = true;
 			}
 		}

 		/* is it an interrupt endpoint? */
 		if ((iface->ep_desc[i].bmAttributes &
 		    USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT) {
 			ueth->ep_int = iface->ep_desc[i].bEndpointAddress &
 				USB_ENDPOINT_NUMBER_MASK;
 			ueth->irqinterval = iface->ep_desc[i].bInterval;
 		}
 	}
 	debug("Endpoints In %d Out %d Int %d\n", ueth->ep_in, ueth->ep_out,
 	      ueth->ep_int);

 	/* Do some basic sanity checks, and bail if we find a problem */
 	if (!ueth->ep_in || !ueth->ep_out || !ueth->ep_int) {
 		debug("%s: %s: Cannot find endpoints\n", __func__, dev->name);
 		return -ENXIO;
 	}

 	ueth->rxsize = rxsize;
 	ueth->rxbuf = memalign(ARCH_DMA_MINALIGN, rxsize);
 	if (!ueth->rxbuf)
 		return -ENOMEM;

 	ret = usb_set_interface(udev, iface_desc->bInterfaceNumber, ifnum);
 	if (ret) {
 		debug("%s: %s: Cannot set interface: %d\n", __func__, dev->name,
 		      ret);
 		return ret;
 	}
 	ueth->pusb_dev = udev;

 	return 0;
 }

 int usb_ether_deregister(struct ueth_data *ueth)
 {
 	return 0;
 }

 int usb_ether_receive(struct ueth_data *ueth, int rxsize)
 {
 	int actual_len;
 	int ret;

 	if (rxsize > ueth->rxsize)
 		return -EINVAL;
 	ret = usb_bulk_msg(ueth->pusb_dev,
 			   usb_rcvbulkpipe(ueth->pusb_dev, ueth->ep_in),
 			   ueth->rxbuf, rxsize, &actual_len,
 			   USB_BULK_RECV_TIMEOUT);
 	debug("Rx: len = %u, actual = %u, err = %d\n", rxsize, actual_len, ret);
 	if (ret) {
 		printf("Rx: failed to receive: %d\n", ret);
 		return ret;
 	}
 	if (actual_len > rxsize) {
 		debug("Rx: received too many bytes %d\n", actual_len);
 		return -ENOSPC;
 	}
 	ueth->rxlen = actual_len;
 	ueth->rxptr = 0;

 	return actual_len ? 0 : -EAGAIN;
 }

 void usb_ether_advance_rxbuf(struct ueth_data *ueth, int num_bytes)
 {
 	ueth->rxptr += num_bytes;
 	if (num_bytes < 0 || ueth->rxptr >= ueth->rxlen)
 		ueth->rxlen = 0;
 }

 int usb_ether_get_rx_bytes(struct ueth_data *ueth, uint8_t **ptrp)
 {
 	if (!ueth->rxlen)
 		return 0;

 	*ptrp = &ueth->rxbuf[ueth->rxptr];

 	return ueth->rxlen - ueth->rxptr;
 }

 #else

 typedef void (*usb_eth_before_probe)(void);
 typedef int (*usb_eth_probe)(struct usb_device *dev, unsigned int ifnum,
 			struct ueth_data *ss);
 typedef int (*usb_eth_get_info)(struct usb_device *dev, struct ueth_data *ss,
 			struct eth_device *dev_desc);

 struct usb_eth_prob_dev {
 	usb_eth_before_probe	before_probe; /* optional */
 	usb_eth_probe			probe;
 	usb_eth_get_info		get_info;
 };

 /* driver functions go here, each bracketed by #ifdef CONFIG_USB_ETHER_xxx */
 static const struct usb_eth_prob_dev prob_dev[] = {
 #ifdef CONFIG_USB_ETHER_ASIX
 	{
 		.before_probe = asix_eth_before_probe,
 		.probe = asix_eth_probe,
 		.get_info = asix_eth_get_info,
 	},
 #endif
 #ifdef CONFIG_USB_ETHER_ASIX88179
 	{
 		.before_probe = ax88179_eth_before_probe,
 		.probe = ax88179_eth_probe,
 		.get_info = ax88179_eth_get_info,
 	},
 #endif
 #ifdef CONFIG_USB_ETHER_MCS7830
 	{
 		.before_probe = mcs7830_eth_before_probe,
 		.probe = mcs7830_eth_probe,
 		.get_info = mcs7830_eth_get_info,
 	},
 #endif
 #ifdef CONFIG_USB_ETHER_SMSC95XX
 	{
 		.before_probe = smsc95xx_eth_before_probe,
 		.probe = smsc95xx_eth_probe,
 		.get_info = smsc95xx_eth_get_info,
 	},
 #endif
 #ifdef CONFIG_USB_ETHER_RTL8152
 	{
 		.before_probe = r8152_eth_before_probe,
 		.probe = r8152_eth_probe,
 		.get_info = r8152_eth_get_info,
 	},
 #endif
 	{ },		/* END */
 };

 static int usb_max_eth_dev; /* number of highest available usb eth device */
 static struct ueth_data usb_eth[USB_MAX_ETH_DEV];

 /*******************************************************************************
  * tell if current ethernet device is a usb dongle
  */
 int is_eth_dev_on_usb_host(void)
 {
 	int i;
 	struct eth_device *dev = eth_get_dev();

 	if (dev) {
 		for (i = 0; i < usb_max_eth_dev; i++)
 			if (&usb_eth[i].eth_dev == dev)
 				return 1;
 	}
 	return 0;
 }

 /*
  * Given a USB device, ask each driver if it can support it, and attach it
  * to the first driver that says 'yes'
  */
 static void probe_valid_drivers(struct usb_device *dev)
 {
 	struct eth_device *eth;
 	int j;

 	for (j = 0; prob_dev[j].probe && prob_dev[j].get_info; j++) {
 		if (!prob_dev[j].probe(dev, 0, &usb_eth[usb_max_eth_dev]))
 			continue;
 		/*
 		 * ok, it is a supported eth device. Get info and fill it in
 		 */
 		eth = &usb_eth[usb_max_eth_dev].eth_dev;
 		if (prob_dev[j].get_info(dev,
 			&usb_eth[usb_max_eth_dev],
 			eth)) {
 			/* found proper driver */
 			/* register with networking stack */
 			usb_max_eth_dev++;

 			/*
 			 * usb_max_eth_dev must be incremented prior to this
 			 * call since eth_current_changed (internally called)
 			 * relies on it
 			 */
 			eth_register(eth);
 			if (eth_write_hwaddr(eth, "usbeth",
 					usb_max_eth_dev - 1))
 				puts("Warning: failed to set MAC address\n");
 			break;
 			}
 		}
 	}

 /*******************************************************************************
  * scan the usb and reports device info
  * to the user if mode = 1
  * returns current device or -1 if no
  */
 int usb_host_eth_scan(int mode)
 {
 	int i, old_async;

 	if (mode == 1)
 		printf("       scanning usb for ethernet devices... ");

 	old_async = usb_disable_asynch(1); /* asynch transfer not allowed */

 	/* unregister a previously detected device */
 	for (i = 0; i < usb_max_eth_dev; i++)
 		eth_unregister(&usb_eth[i].eth_dev);

 	memset(usb_eth, 0, sizeof(usb_eth));

 	for (i = 0; prob_dev[i].probe; i++) {
 		if (prob_dev[i].before_probe)
 			prob_dev[i].before_probe();
 	}

 	usb_max_eth_dev = 0;
 #if CONFIG_IS_ENABLED(DM_USB)
 	/*
 	 * TODO: We should add U_BOOT_USB_DEVICE() declarations to each USB
 	 * Ethernet driver and then most of this file can be removed.
 	 */
 	struct udevice *bus;
 	struct uclass *uc;
 	int ret;

 	ret = uclass_get(UCLASS_USB, &uc);
 	if (ret)
 		return ret;
 	uclass_foreach_dev(bus, uc) {
 		for (i = 0; i < USB_MAX_DEVICE; i++) {
 			struct usb_device *dev;

 			dev = usb_get_dev_index(bus, i); /* get device */
 			debug("i=%d, %s\n", i, dev ? dev->dev->name : "(done)");
 			if (!dev)
 				break; /* no more devices available */

 			/*
 			 * find valid usb_ether driver for this device,
 			 * if any
 			 */
 			probe_valid_drivers(dev);

 			/* check limit */
 			if (usb_max_eth_dev == USB_MAX_ETH_DEV)
 				break;
 		} /* for */
 	}
 #else
 	for (i = 0; i < USB_MAX_DEVICE; i++) {
 		struct usb_device *dev;

 		dev = usb_get_dev_index(i); /* get device */
 		debug("i=%d\n", i);
 		if (!dev)
 			break; /* no more devices available */

 		/* find valid usb_ether driver for this device, if any */
 		probe_valid_drivers(dev);

 		/* check limit */
 		if (usb_max_eth_dev == USB_MAX_ETH_DEV)
 			break;
 	} /* for */
 #endif
 	if (usb_max_eth_dev == USB_MAX_ETH_DEV) {
 		printf("max USB Ethernet Device reached: %d stopping\n",
 		       usb_max_eth_dev);
 	}
 	usb_disable_asynch(old_async); /* restore asynch value */
 	printf("%d Ethernet Device(s) found\n", usb_max_eth_dev);
 	if (usb_max_eth_dev > 0)
 		return 0;
 	return -1;
 }
 #endif
	// SPDX-License-Identifier: GPL-2.0+
	/*
	* Copyright (c) 2011 The Chromium OS Authors.
	*/

	#include <common.h>
	#include <dm.h>
	#include <errno.h>
	#include <malloc.h>
	#include <usb.h>
	#include <dm/device-internal.h>

	#include "usb_ether.h"

	#ifdef CONFIG_DM_ETH

	#define USB_BULK_RECV_TIMEOUT 500

	int usb_ether_register(struct udevice dev, struct ueth_data ueth, int rxsize)
	{
	struct usb_device *udev = dev_get_parent_priv(dev);
	struct usb_interface_descriptor *iface_desc;
	bool ep_in_found = false, ep_out_found = false;
	struct usb_interface *iface;
	const int ifnum = 0; /* Always use interface 0 */
	int ret, i;

	iface = &udev->config.if_desc[ifnum];
	iface_desc = &udev->config.if_desc[ifnum].desc;

	/* Initialize the ueth_data structure with some useful info */
	ueth->ifnum = ifnum;
	ueth->subclass = iface_desc->bInterfaceSubClass;
	ueth->protocol = iface_desc->bInterfaceProtocol;

	/*
	* We are expecting a minimum of 3 endpoints - in, out (bulk), and int.
	* We will ignore any others.
	*/
	for (i = 0; i < iface_desc->bNumEndpoints; i++) {
	int ep_addr = iface->ep_desc[i].bEndpointAddress;

	/* is it an BULK endpoint? */
	if ((iface->ep_desc[i].bmAttributes &
	USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_BULK) {
	if (ep_addr & USB_DIR_IN && !ep_in_found) {
	ueth->ep_in = ep_addr &
	USB_ENDPOINT_NUMBER_MASK;
	ep_in_found = true;
	} else if (!(ep_addr & USB_DIR_IN) && !ep_out_found) {
	ueth->ep_out = ep_addr &
	USB_ENDPOINT_NUMBER_MASK;
	ep_out_found = true;
	}
	}

	/* is it an interrupt endpoint? */
	if ((iface->ep_desc[i].bmAttributes &
	USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT) {
	ueth->ep_int = iface->ep_desc[i].bEndpointAddress &
	USB_ENDPOINT_NUMBER_MASK;
	ueth->irqinterval = iface->ep_desc[i].bInterval;
	}
	}
	debug("Endpoints In %d Out %d Int %d\n", ueth->ep_in, ueth->ep_out,
	ueth->ep_int);

	/* Do some basic sanity checks, and bail if we find a problem */
	if (!ueth->ep_in \|\| !ueth->ep_out \|\| !ueth->ep_int) {
	debug("%s: %s: Cannot find endpoints\n", __func__, dev->name);
	return -ENXIO;
	}

	ueth->rxsize = rxsize;
	ueth->rxbuf = memalign(ARCH_DMA_MINALIGN, rxsize);
	if (!ueth->rxbuf)
	return -ENOMEM;

	ret = usb_set_interface(udev, iface_desc->bInterfaceNumber, ifnum);
	if (ret) {
	debug("%s: %s: Cannot set interface: %d\n", __func__, dev->name,
	ret);
	return ret;
	}
	ueth->pusb_dev = udev;

	return 0;
	}

	int usb_ether_deregister(struct ueth_data *ueth)
	{
	return 0;
	}

	int usb_ether_receive(struct ueth_data *ueth, int rxsize)
	{
	int actual_len;
	int ret;

	if (rxsize > ueth->rxsize)
	return -EINVAL;
	ret = usb_bulk_msg(ueth->pusb_dev,
	usb_rcvbulkpipe(ueth->pusb_dev, ueth->ep_in),
	ueth->rxbuf, rxsize, &actual_len,
	USB_BULK_RECV_TIMEOUT);
	debug("Rx: len = %u, actual = %u, err = %d\n", rxsize, actual_len, ret);
	if (ret) {
	printf("Rx: failed to receive: %d\n", ret);
	return ret;
	}
	if (actual_len > rxsize) {
	debug("Rx: received too many bytes %d\n", actual_len);
	return -ENOSPC;
	}
	ueth->rxlen = actual_len;
	ueth->rxptr = 0;

	return actual_len ? 0 : -EAGAIN;
	}

	void usb_ether_advance_rxbuf(struct ueth_data *ueth, int num_bytes)
	{
	ueth->rxptr += num_bytes;
	if (num_bytes < 0 \|\| ueth->rxptr >= ueth->rxlen)
	ueth->rxlen = 0;
	}

	int usb_ether_get_rx_bytes(struct ueth_data ueth, uint8_t *ptrp)
	{
	if (!ueth->rxlen)
	return 0;

	*ptrp = &ueth->rxbuf[ueth->rxptr];

	return ueth->rxlen - ueth->rxptr;
	}

	#else

	typedef void (*usb_eth_before_probe)(void);
	typedef int (usb_eth_probe)(struct usb_device dev, unsigned int ifnum,
	struct ueth_data *ss);
	typedef int (usb_eth_get_info)(struct usb_device dev, struct ueth_data *ss,
	struct eth_device *dev_desc);

	struct usb_eth_prob_dev {
	usb_eth_before_probe before_probe; /* optional */
	usb_eth_probe probe;
	usb_eth_get_info get_info;
	};

	/* driver functions go here, each bracketed by #ifdef CONFIG_USB_ETHER_xxx */
	static const struct usb_eth_prob_dev prob_dev[] = {
	#ifdef CONFIG_USB_ETHER_ASIX
	{
	.before_probe = asix_eth_before_probe,
	.probe = asix_eth_probe,
	.get_info = asix_eth_get_info,
	},
	#endif
	#ifdef CONFIG_USB_ETHER_ASIX88179
	{
	.before_probe = ax88179_eth_before_probe,
	.probe = ax88179_eth_probe,
	.get_info = ax88179_eth_get_info,
	},
	#endif
	#ifdef CONFIG_USB_ETHER_MCS7830
	{
	.before_probe = mcs7830_eth_before_probe,
	.probe = mcs7830_eth_probe,
	.get_info = mcs7830_eth_get_info,
	},
	#endif
	#ifdef CONFIG_USB_ETHER_SMSC95XX
	{
	.before_probe = smsc95xx_eth_before_probe,
	.probe = smsc95xx_eth_probe,
	.get_info = smsc95xx_eth_get_info,
	},
	#endif
	#ifdef CONFIG_USB_ETHER_RTL8152
	{
	.before_probe = r8152_eth_before_probe,
	.probe = r8152_eth_probe,
	.get_info = r8152_eth_get_info,
	},
	#endif
	{ }, /* END */
	};

	static int usb_max_eth_dev; /* number of highest available usb eth device */
	static struct ueth_data usb_eth[USB_MAX_ETH_DEV];

	/*******************************************************************************
	* tell if current ethernet device is a usb dongle
	*/
	int is_eth_dev_on_usb_host(void)
	{
	int i;
	struct eth_device *dev = eth_get_dev();

	if (dev) {
	for (i = 0; i < usb_max_eth_dev; i++)
	if (&usb_eth[i].eth_dev == dev)
	return 1;
	}
	return 0;
	}

	/*
	* Given a USB device, ask each driver if it can support it, and attach it
	* to the first driver that says 'yes'
	*/
	static void probe_valid_drivers(struct usb_device *dev)
	{
	struct eth_device *eth;
	int j;

	for (j = 0; prob_dev[j].probe && prob_dev[j].get_info; j++) {
	if (!prob_dev[j].probe(dev, 0, &usb_eth[usb_max_eth_dev]))
	continue;
	/*
	* ok, it is a supported eth device. Get info and fill it in
	*/
	eth = &usb_eth[usb_max_eth_dev].eth_dev;
	if (prob_dev[j].get_info(dev,
	&usb_eth[usb_max_eth_dev],
	eth)) {
	/* found proper driver */
	/* register with networking stack */
	usb_max_eth_dev++;

	/*
	* usb_max_eth_dev must be incremented prior to this
	* call since eth_current_changed (internally called)
	* relies on it
	*/
	eth_register(eth);
	if (eth_write_hwaddr(eth, "usbeth",
	usb_max_eth_dev - 1))
	puts("Warning: failed to set MAC address\n");
	break;
	}
	}
	}

	/*******************************************************************************
	* scan the usb and reports device info
	* to the user if mode = 1
	* returns current device or -1 if no
	*/
	int usb_host_eth_scan(int mode)
	{
	int i, old_async;

	if (mode == 1)
	printf(" scanning usb for ethernet devices... ");

	old_async = usb_disable_asynch(1); /* asynch transfer not allowed */

	/* unregister a previously detected device */
	for (i = 0; i < usb_max_eth_dev; i++)
	eth_unregister(&usb_eth[i].eth_dev);

	memset(usb_eth, 0, sizeof(usb_eth));

	for (i = 0; prob_dev[i].probe; i++) {
	if (prob_dev[i].before_probe)
	prob_dev[i].before_probe();
	}

	usb_max_eth_dev = 0;
	#if CONFIG_IS_ENABLED(DM_USB)
	/*
	* TODO: We should add U_BOOT_USB_DEVICE() declarations to each USB
	* Ethernet driver and then most of this file can be removed.
	*/
	struct udevice *bus;
	struct uclass *uc;
	int ret;

	ret = uclass_get(UCLASS_USB, &uc);
	if (ret)
	return ret;
	uclass_foreach_dev(bus, uc) {
	for (i = 0; i < USB_MAX_DEVICE; i++) {
	struct usb_device *dev;

	dev = usb_get_dev_index(bus, i); /* get device */
	debug("i=%d, %s\n", i, dev ? dev->dev->name : "(done)");
	if (!dev)
	break; /* no more devices available */

	/*
	* find valid usb_ether driver for this device,
	* if any
	*/
	probe_valid_drivers(dev);

	/* check limit */
	if (usb_max_eth_dev == USB_MAX_ETH_DEV)
	break;
	} /* for */
	}
	#else
	for (i = 0; i < USB_MAX_DEVICE; i++) {
	struct usb_device *dev;

	dev = usb_get_dev_index(i); /* get device */
	debug("i=%d\n", i);
	if (!dev)
	break; /* no more devices available */

	/* find valid usb_ether driver for this device, if any */
	probe_valid_drivers(dev);

	/* check limit */
	if (usb_max_eth_dev == USB_MAX_ETH_DEV)
	break;
	} /* for */
	#endif
	if (usb_max_eth_dev == USB_MAX_ETH_DEV) {
	printf("max USB Ethernet Device reached: %d stopping\n",
	usb_max_eth_dev);
	}
	usb_disable_asynch(old_async); /* restore asynch value */
	printf("%d Ethernet Device(s) found\n", usb_max_eth_dev);
	if (usb_max_eth_dev > 0)
	return 0;
	return -1;
	}
	#endif