dm: usb: eth: Support driver model with USB Ethernet

[karo-tx-uboot.git] / include / usb_ether.h

diff --git a/include/usb_ether.h b/include/usb_ether.h
index 23507e19e6024918e7617a4a4a98f87e69c774f9..c6d1416048a113c37d529d503bb255f47dffa197 100644 (file)
--- 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__ */