ssb: pci: implement mdio reading
Signed-off-by: Rafał Miłecki <zajec5@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
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@ -467,6 +467,49 @@ static void ssb_pcie_mdio_set_phy(struct ssb_pcicore *pc, u8 phy)
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}
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}
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#if 0
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//done but not used yet
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static u16 ssb_pcie_mdio_read(struct ssb_pcicore *pc, u8 device, u8 address)
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{
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const u16 mdio_control = 0x128;
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const u16 mdio_data = 0x12C;
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int max_retries = 10;
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u16 ret = 0;
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u32 v;
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int i;
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v = 0x80; /* Enable Preamble Sequence */
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v |= 0x2; /* MDIO Clock Divisor */
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pcicore_write32(pc, mdio_control, v);
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if (pc->dev->id.revision >= 10) {
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max_retries = 200;
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ssb_pcie_mdio_set_phy(pc, device);
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}
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v = (1 << 30); /* Start of Transaction */
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v |= (1 << 29); /* Read Transaction */
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v |= (1 << 17); /* Turnaround */
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if (pc->dev->id.revision < 10)
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v |= (u32)device << 22;
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v |= (u32)address << 18;
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pcicore_write32(pc, mdio_data, v);
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/* Wait for the device to complete the transaction */
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udelay(10);
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for (i = 0; i < 200; i++) {
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v = pcicore_read32(pc, mdio_control);
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if (v & 0x100 /* Trans complete */) {
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udelay(10);
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ret = pcicore_read32(pc, mdio_data);
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break;
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}
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msleep(1);
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}
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pcicore_write32(pc, mdio_control, 0);
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return ret;
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}
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#endif
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static void ssb_pcie_mdio_write(struct ssb_pcicore *pc, u8 device,
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u8 address, u16 data)
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{
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