Add Ethernet hardware MAC address framework to usbnet

Built-in Ethernet adapters support setting the mac address by means of a
ethaddr environment variable for each interface (ethaddr, eth1addr, eth2addr).

This adds similar support to the USB network side, using the names
usbethaddr, usbeth1addr, etc. They are kept separate since we don't want
a USB device taking the MAC address of a built-in device or vice versa.

Signed-off-by: Simon Glass <sjg@chromium.org>
Tested-by: Eric Bénard <eric@eukrea.com>

diff --git a/board/davinci/common/misc.c b/board/davinci/common/misc.c
index 6103339216dd3ef893967220a0df40764254ea29..89ae1115d6078931b6e784d97154e984306966c7 100644 (file)
--- a/board/davinci/common/misc.c
+++ b/board/davinci/common/misc.c
@@ -101,7 +101,7 @@ void davinci_sync_env_enetaddr(uint8_t *rom_enetaddr)
 {
        uint8_t env_enetaddr[6];
 
-       eth_getenv_enetaddr_by_index(0, env_enetaddr);
+       eth_getenv_enetaddr_by_index("eth", 0, env_enetaddr);
        if (!memcmp(env_enetaddr, "\0\0\0\0\0\0", 6)) {
                /* There is no MAC address in the environment, so we initialize
                 * it from the value in the EEPROM. */

diff --git a/drivers/net/designware.c b/drivers/net/designware.c
index bfa43842ac34b582a7f1796192b14fe09ce4ac6f..1e34436772d3018403c7615331b600dc3595e660 100644 (file)
--- a/drivers/net/designware.c
+++ b/drivers/net/designware.c
@@ -504,7 +504,7 @@ int designware_initialize(u32 id, ulong base_addr, u32 phy_addr)
        dev->iobase = (int)base_addr;
        dev->priv = priv;
 
-       eth_getenv_enetaddr_by_index(id, &dev->enetaddr[0]);
+       eth_getenv_enetaddr_by_index("eth", id, &dev->enetaddr[0]);
 
        priv->dev = dev;
        priv->mac_regs_p = (struct eth_mac_regs *)base_addr;

diff --git a/drivers/usb/eth/usb_ether.c b/drivers/usb/eth/usb_ether.c
index 7b55da30e06736d521785ed7943c5872cae5f411..6565ea5590b8235834166c99bb083b3cc1debd72 100644 (file)
--- a/drivers/usb/eth/usb_ether.c
+++ b/drivers/usb/eth/usb_ether.c
@@ -80,6 +80,7 @@ int is_eth_dev_on_usb_host(void)
  */
 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++) {
@@ -88,9 +89,10 @@ static void probe_valid_drivers(struct usb_device *dev)
                /*
                 * 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],
-                       &usb_eth[usb_max_eth_dev].eth_dev)) {
+                       eth)) {
                        /* found proper driver */
                        /* register with networking stack */
                        usb_max_eth_dev++;
@@ -100,7 +102,10 @@ static void probe_valid_drivers(struct usb_device *dev)
                         * call since eth_current_changed (internally called)
                         * relies on it
                         */
-                       eth_register(&usb_eth[usb_max_eth_dev - 1].eth_dev);
+                       eth_register(eth);
+                       if (eth_write_hwaddr(eth, "usbeth",
+                                       usb_max_eth_dev - 1))
+                               puts("Warning: failed to set MAC address\n");
                        break;
                        }
                }

diff --git a/include/net.h b/include/net.h
index 018a74402c8357f55e3c63777cb49be4514ccd78..ce54825085569a29c7242958a06956882b6138d6 100644 (file)
--- a/include/net.h
+++ b/include/net.h
@@ -128,7 +128,18 @@ extern int eth_get_dev_index (void);               /* get the device index */
 extern void eth_parse_enetaddr(const char *addr, uchar *enetaddr);
 extern int eth_getenv_enetaddr(char *name, uchar *enetaddr);
 extern int eth_setenv_enetaddr(char *name, const uchar *enetaddr);
-extern int eth_getenv_enetaddr_by_index(int index, uchar *enetaddr);
+
+/*
+ * Get the hardware address for an ethernet interface .
+ * Args:
+ *     base_name - base name for device (normally "eth")
+ *     index - device index number (0 for first)
+ *     enetaddr - returns 6 byte hardware address
+ * Returns:
+ *     Return true if the address is valid.
+ */
+extern int eth_getenv_enetaddr_by_index(const char *base_name, int index,
+                                       uchar *enetaddr);
 
 extern int usb_eth_initialize(bd_t *bi);
 extern int eth_init(bd_t *bis);                        /* Initialize the device */
@@ -141,6 +152,18 @@ extern int eth_rx(void);                   /* Check for received packets */
 extern void eth_halt(void);                    /* stop SCC */
 extern char *eth_get_name(void);               /* get name of current device */
 
+/*
+ * Set the hardware address for an ethernet interface based on 'eth%daddr'
+ * environment variable (or just 'ethaddr' if eth_number is 0).
+ * Args:
+ *     base_name - base name for device (normally "eth")
+ *     eth_number - value of %d (0 for first device of this type)
+ * Returns:
+ *     0 is success, non-zero is error status from driver.
+ */
+int eth_write_hwaddr(struct eth_device *dev, const char *base_name,
+                    int eth_number);
+
 #ifdef CONFIG_MCAST_TFTP
 int eth_mcast_join( IPaddr_t mcast_addr, u8 join);
 u32 ether_crc (size_t len, unsigned char const *p);

diff --git a/net/eth.c b/net/eth.c
index 3aad71f5d35ba0e59e9b0d25f7db8ea86b637577..a34fe59383f38bc40a830c2628d191960c4396d3 100644 (file)
--- a/net/eth.c
+++ b/net/eth.c
@@ -54,10 +54,11 @@ int eth_setenv_enetaddr(char *name, const uchar *enetaddr)
        return setenv(name, buf);
 }
 
-int eth_getenv_enetaddr_by_index(int index, uchar *enetaddr)
+int eth_getenv_enetaddr_by_index(const char *base_name, int index,
+                                uchar *enetaddr)
 {
        char enetvar[32];
-       sprintf(enetvar, index ? "eth%daddr" : "ethaddr", index);
+       sprintf(enetvar, index ? "%s%daddr" : "%saddr", base_name, index);
        return eth_getenv_enetaddr(enetvar, enetaddr);
 }
 
@@ -188,6 +189,38 @@ static void eth_current_changed(void)
 #endif
 }
 
+int eth_write_hwaddr(struct eth_device *dev, const char *base_name,
+                  int eth_number)
+{
+       unsigned char env_enetaddr[6];
+       int ret = 0;
+
+       if (!eth_getenv_enetaddr_by_index(base_name, eth_number, env_enetaddr))
+               return -1;
+
+       if (memcmp(env_enetaddr, "\0\0\0\0\0\0", 6)) {
+               if (memcmp(dev->enetaddr, "\0\0\0\0\0\0", 6) &&
+                       memcmp(dev->enetaddr, env_enetaddr, 6)) {
+                       printf("\nWarning: %s MAC addresses don't match:\n",
+                               dev->name);
+                       printf("Address in SROM is         %pM\n",
+                               dev->enetaddr);
+                       printf("Address in environment is  %pM\n",
+                               env_enetaddr);
+               }
+
+               memcpy(dev->enetaddr, env_enetaddr, 6);
+       }
+
+       if (dev->write_hwaddr &&
+               !eth_mac_skip(eth_number) &&
+               is_valid_ether_addr(dev->enetaddr)) {
+               ret = dev->write_hwaddr(dev);
+       }
+
+       return ret;
+}
+
 int eth_register(struct eth_device *dev)
 {
        struct eth_device *d;
@@ -208,7 +241,6 @@ int eth_register(struct eth_device *dev)
 
 int eth_initialize(bd_t *bis)
 {
-       unsigned char env_enetaddr[6];
        int eth_number = 0;
 
        eth_devices = NULL;
@@ -264,27 +296,8 @@ int eth_initialize(bd_t *bis)
                        if (strchr(dev->name, ' '))
                                puts("\nWarning: eth device name has a space!\n");
 
-                       eth_getenv_enetaddr_by_index(eth_number, env_enetaddr);
-
-                       if (memcmp(env_enetaddr, "\0\0\0\0\0\0", 6)) {
-                               if (memcmp(dev->enetaddr, "\0\0\0\0\0\0", 6) &&
-                                   memcmp(dev->enetaddr, env_enetaddr, 6))
-                               {
-                                       printf ("\nWarning: %s MAC addresses don't match:\n",
-                                               dev->name);
-                                       printf ("Address in SROM is         %pM\n",
-                                               dev->enetaddr);
-                                       printf ("Address in environment is  %pM\n",
-                                               env_enetaddr);
-                               }
-
-                               memcpy(dev->enetaddr, env_enetaddr, 6);
-                       }
-                       if (dev->write_hwaddr &&
-                               !eth_mac_skip(eth_number) &&
-                               is_valid_ether_addr(dev->enetaddr)) {
-                               dev->write_hwaddr(dev);
-                       }
+                       if (eth_write_hwaddr(dev, NULL, eth_number))
+                               puts("Warning: failed to set MAC address\n");
 
                        eth_number++;
                        dev = dev->next;
@@ -359,7 +372,8 @@ int eth_init(bd_t *bis)
        do {
                uchar env_enetaddr[6];
 
-               if (eth_getenv_enetaddr_by_index(eth_number, env_enetaddr))
+               if (eth_getenv_enetaddr_by_index("eth", eth_number,
+                                                env_enetaddr))
                        memcpy(dev->enetaddr, env_enetaddr, 6);
 
                ++eth_number;