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61 lines
1.7 KiB
Diff
61 lines
1.7 KiB
Diff
--- a/drivers/usb/gadget/ether.c
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+++ b/drivers/usb/gadget/ether.c
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@@ -2249,6 +2249,38 @@ static u8 __devinit nibble (unsigned cha
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return 0;
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}
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+static inline unsigned int is_gumstix_oui(u8 *addr)
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+{
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+ return (addr[0] == 0x00 && addr[1] == 0x15 && addr[2] == 0xC9);
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+}
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+
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+/**
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+ * gen_serial_ether_addr - Generate software assigned Ethernet address
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+ * based on the system_serial number
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+ * @addr: Pointer to a six-byte array containing the Ethernet address
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+ *
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+ * Generate an Ethernet address (MAC) that is not multicast
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+ * and has the local assigned bit set, keyed on the system_serial
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+ */
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+static inline void gen_serial_ether_addr(u8 *addr)
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+{
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+ static u8 ether_serial_digit = 0;
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+ addr [0] = system_serial_high >> 8;
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+ addr [1] = system_serial_high;
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+ addr [2] = system_serial_low >> 24;
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+ addr [3] = system_serial_low >> 16;
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+ addr [4] = system_serial_low >> 8;
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+ addr [5] = (system_serial_low & 0xc0) | /* top bits are from system serial */
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+ (2 << 4) | /* 2 bits identify interface type 1=ether, 2=usb, 3&4 undef */
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+ ((ether_serial_digit++) & 0x0f); /* 15 possible interfaces of each type */
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+
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+ if(!is_gumstix_oui(addr))
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+ {
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+ addr [0] &= 0xfe; /* clear multicast bit */
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+ addr [0] |= 0x02; /* set local assignment bit (IEEE802) */
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+ }
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+}
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+
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static int __devinit get_ether_addr(const char *str, u8 *dev_addr)
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{
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if (str) {
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@@ -2266,8 +2298,16 @@ static int __devinit get_ether_addr(cons
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if (is_valid_ether_addr (dev_addr))
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return 0;
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}
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- random_ether_addr(dev_addr);
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- return 1;
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+ if(system_serial_high | system_serial_low)
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+ {
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+ gen_serial_ether_addr(dev_addr);
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+ return 0;
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+ }
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+ else
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+ {
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+ random_ether_addr(dev_addr);
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+ return 1;
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+ }
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}
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static int __devinit
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