diff options
| -rw-r--r-- | common/cmd_usb.c | 2 | ||||
| -rw-r--r-- | drivers/usb/eth/usb_ether.c | 127 | ||||
| -rw-r--r-- | include/usb_ether.h | 89 |
3 files changed, 206 insertions, 12 deletions
diff --git a/common/cmd_usb.c b/common/cmd_usb.c index 6198d06..0ade775 100644 --- a/common/cmd_usb.c +++ b/common/cmd_usb.c @@ -22,7 +22,7 @@ #ifdef CONFIG_USB_STORAGE static int usb_stor_curr_dev = -1; /* current device */ #endif -#ifdef CONFIG_USB_HOST_ETHER +#if defined(CONFIG_USB_HOST_ETHER) && !defined(CONFIG_DM_ETH) static int __maybe_unused usb_ether_curr_dev = -1; /* current ethernet device */ #endif diff --git a/drivers/usb/eth/usb_ether.c b/drivers/usb/eth/usb_ether.c index c72b7e4..07d2309 100644 --- a/drivers/usb/eth/usb_ether.c +++ b/drivers/usb/eth/usb_ether.c @@ -6,11 +6,137 @@ #include <common.h> #include <dm.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_parentdata(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(rxsize, ARCH_DMA_MINALIGN); + 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); @@ -197,3 +323,4 @@ int usb_host_eth_scan(int mode) return 0; return -1; } +#endif diff --git a/include/usb_ether.h b/include/usb_ether.h index 23507e1..c6d1416 100644 --- a/include/usb_ether.h +++ b/include/usb_ether.h @@ -19,25 +19,91 @@ #define ETH_DATA_LEN 1500 /* Max. octets in payload */ #define ETH_FRAME_LEN PKTSIZE_ALIGN /* Max. octets in frame sans FCS */ +/* TODO(sjg@chromium.org): Remove @pusb_dev when all boards use CONFIG_DM_ETH */ struct ueth_data { /* eth info */ - struct eth_device eth_dev; /* used with eth_register */ - int phy_id; /* mii phy id */ +#ifdef CONFIG_DM_ETH + uint8_t *rxbuf; + int rxsize; + int rxlen; /* Total bytes available in rxbuf */ + int rxptr; /* Current position in rxbuf */ +#else + struct eth_device eth_dev; /* used with eth_register */ + /* driver private */ + void *dev_priv; +#endif + int phy_id; /* mii phy id */ /* usb info */ struct usb_device *pusb_dev; /* this usb_device */ - unsigned char ifnum; /* interface number */ - unsigned char ep_in; /* in endpoint */ - unsigned char ep_out; /* out ....... */ - unsigned char ep_int; /* interrupt . */ - unsigned char subclass; /* as in overview */ - unsigned char protocol; /* .............. */ + unsigned char ifnum; /* interface number */ + unsigned char ep_in; /* in endpoint */ + unsigned char ep_out; /* out ....... */ + unsigned char ep_int; /* interrupt . */ + unsigned char subclass; /* as in overview */ + unsigned char protocol; /* .............. */ unsigned char irqinterval; /* Intervall for IRQ Pipe */ - - /* driver private */ - void *dev_priv; }; +#ifdef CONFIG_DM_ETH +/** + * usb_ether_register() - register a new USB ethernet device + * + * This selects the correct USB interface and figures out the endpoints to use. + * + * @dev: USB device + * @ss: Place to put USB ethernet data + * @rxsize: Maximum size to allocate for the receive buffer + * @return 0 if OK, -ve on error + */ +int usb_ether_register(struct udevice *dev, struct ueth_data *ueth, int rxsize); + +/** + * usb_ether_deregister() - deregister a USB ethernet device + * + * @ueth: USB Ethernet device + * @return 0 + */ +int usb_ether_deregister(struct ueth_data *ueth); + +/** + * usb_ether_receive() - recieve a packet from the bulk in endpoint + * + * The packet is stored in the internal buffer ready for processing. + * + * @ueth: USB Ethernet device + * @rxsize: Maximum size to receive + * @return 0 if a packet was received, -EAGAIN if not, -ENOSPC if @rxsize is + * larger than the size passed ot usb_ether_register(), other -ve on error + */ +int usb_ether_receive(struct ueth_data *ueth, int rxsize); + +/** + * usb_ether_get_rx_bytes() - obtain bytes from the internal packet buffer + * + * This should be called repeatedly to obtain packet data until it returns 0. + * After each packet is processed, call usb_ether_advance_rxbuf() to move to + * the next one. + * + * @ueth: USB Ethernet device + * @ptrp: Returns a pointer to the start of the next packet if there is + * one available + * @return number of bytes available, or 0 if none + */ +int usb_ether_get_rx_bytes(struct ueth_data *ueth, uint8_t **ptrp); + +/** + * usb_ether_advance_rxbuf() - Advance to the next packet in the internal buffer + * + * After processing the data returned by usb_ether_get_rx_bytes(), call this + * function to move to the next packet. You must specify the number of bytes + * you have processed in @num_bytes. + * + * @ueth: USB Ethernet device + * @num_bytes: Number of bytes to skip, or -1 to skip all bytes + */ +void usb_ether_advance_rxbuf(struct ueth_data *ueth, int num_bytes); +#else /* * Function definitions for each USB ethernet driver go here * (declaration is unconditional, compilation is conditional) @@ -65,5 +131,6 @@ int smsc95xx_eth_probe(struct usb_device *dev, unsigned int ifnum, struct ueth_data *ss); int smsc95xx_eth_get_info(struct usb_device *dev, struct ueth_data *ss, struct eth_device *eth); +#endif #endif /* __USB_ETHER_H__ */ |