atl1c: refine SERDES-clock related code

bit 17/18 of reg1424 must be clear for l2cb 1.x, or it will cause
the write-reg operation fail without cable connected.
so, please do connect the cable when apply this patch to the driver
to make sure these 2bits are cleared by new driver.
The revised code is move to al1c_reset_mac.
SERDES register definition is refined as well.

when do reset MAC, speed/duplex control right should be transferred
to software before do PHY auto-neg -- by bit MASTER_CTRL_SPEED_MODE_SW.
SERDES register definition is refined as well.

Signed-off-by: xiong <xiong@qca.qualcomm.com>
Tested-by: Liu David <dwliu@qca.qualcomm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/atheros/atl1c/atl1c_ethtool.c b/drivers/net/ethernet/atheros/atl1c/atl1c_ethtool.c
index 3feb846..859ea84 100644 (file)
--- a/drivers/net/ethernet/atheros/atl1c/atl1c_ethtool.c
+++ b/drivers/net/ethernet/atheros/atl1c/atl1c_ethtool.c
@@ -153,7 +153,7 @@ static void atl1c_get_regs(struct net_device *netdev,
        AT_READ_REG(hw, REG_LINK_CTRL,            p++);
        AT_READ_REG(hw, REG_IDLE_STATUS,          p++);
        AT_READ_REG(hw, REG_MDIO_CTRL,            p++);
-       AT_READ_REG(hw, REG_SERDES_LOCK,          p++);
+       AT_READ_REG(hw, REG_SERDES,               p++);
        AT_READ_REG(hw, REG_MAC_CTRL,             p++);
        AT_READ_REG(hw, REG_MAC_IPG_IFG,          p++);
        AT_READ_REG(hw, REG_MAC_STA_ADDR,         p++);

diff --git a/drivers/net/ethernet/atheros/atl1c/atl1c_hw.h b/drivers/net/ethernet/atheros/atl1c/atl1c_hw.h
index cb2d20b..113e67b 100644 (file)
--- a/drivers/net/ethernet/atheros/atl1c/atl1c_hw.h
+++ b/drivers/net/ethernet/atheros/atl1c/atl1c_hw.h
@@ -327,18 +327,28 @@ int atl1c_write_phy_ext(struct atl1c_hw *hw, u8 dev_addr,
 #define BIST1_FUSE_FLAG                0x4
 
 /* SerDes Lock Detect Control and Status Register */
-#define REG_SERDES_LOCK                0x1424
-#define SERDES_LOCK_DETECT             0x1  /* SerDes lock detected. This signal
-                                             * comes from Analog SerDes */
-#define SERDES_LOCK_DETECT_EN          0x2  /* 1: Enable SerDes Lock detect function */
-#define SERDES_LOCK_STS_SELFB_PLL_SHIFT 0xE
-#define SERDES_LOCK_STS_SELFB_PLL_MASK  0x3
-#define SERDES_OVCLK_18_25             0x0
-#define SERDES_OVCLK_12_18             0x1
-#define SERDES_OVCLK_0_4               0x2
-#define SERDES_OVCLK_4_12              0x3
-#define SERDES_MAC_CLK_SLOWDOWN                0x20000
-#define SERDES_PYH_CLK_SLOWDOWN                0x40000
+#define REG_SERDES                     0x1424
+#define SERDES_PHY_CLK_SLOWDOWN                BIT(18)
+#define SERDES_MAC_CLK_SLOWDOWN                BIT(17)
+#define SERDES_SELFB_PLL_MASK          0x3UL
+#define SERDES_SELFB_PLL_SHIFT         14
+#define SERDES_PHYCLK_SEL_GTX          BIT(13) /* 1:gtx_clk, 0:25M */
+#define SERDES_PCIECLK_SEL_SRDS                BIT(12) /* 1:serdes,0:25M */
+#define SERDES_BUFS_RX_EN              BIT(11)
+#define SERDES_PD_RX                   BIT(10)
+#define SERDES_PLL_EN                  BIT(9)
+#define SERDES_EN                      BIT(8)
+#define SERDES_SELFB_PLL_SEL_CSR       BIT(6)  /* 0:state-machine,1:csr */
+#define SERDES_SELFB_PLL_CSR_MASK      0x3UL
+#define SERDES_SELFB_PLL_CSR_SHIFT     4
+#define SERDES_SELFB_PLL_CSR_4         3       /* 4-12% OV-CLK */
+#define SERDES_SELFB_PLL_CSR_0         2       /* 0-4% OV-CLK */
+#define SERDES_SELFB_PLL_CSR_12                1       /* 12-18% OV-CLK */
+#define SERDES_SELFB_PLL_CSR_18                0       /* 18-25% OV-CLK */
+#define SERDES_VCO_SLOW                        BIT(3)
+#define SERDES_VCO_FAST                        BIT(2)
+#define SERDES_LOCK_DETECT_EN          BIT(1)
+#define SERDES_LOCK_DETECT             BIT(0)
 
 /* MAC Control Register  */
 #define REG_MAC_CTRL                   0x1480

diff --git a/drivers/net/ethernet/atheros/atl1c/atl1c_main.c b/drivers/net/ethernet/atheros/atl1c/atl1c_main.c
index f0f348b..cf78287 100644 (file)
--- a/drivers/net/ethernet/atheros/atl1c/atl1c_main.c
+++ b/drivers/net/ethernet/atheros/atl1c/atl1c_main.c
@@ -1008,7 +1008,6 @@ static void atl1c_configure_des_ring(struct atl1c_adapter *adapter)
        struct atl1c_rrd_ring *rrd_ring = &adapter->rrd_ring;
        struct atl1c_tpd_ring *tpd_ring = (struct atl1c_tpd_ring *)
                                adapter->tpd_ring;
-       u32 data;
 
        /* TPD */
        AT_WRITE_REG(hw, REG_TX_BASE_ADDR_HI,
@@ -1052,13 +1051,6 @@ static void atl1c_configure_des_ring(struct atl1c_adapter *adapter)
                AT_WRITE_REG(hw, REG_TXF_WATER_MARK, 0);        /* TX watermark, to enter l1 state.*/
                AT_WRITE_REG(hw, REG_RXD_DMA_CTRL, 0);          /* RXD threshold.*/
        }
-       if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l1d_2) {
-                       /* Power Saving for L2c_B */
-               AT_READ_REG(hw, REG_SERDES_LOCK, &data);
-               data |= SERDES_MAC_CLK_SLOWDOWN;
-               data |= SERDES_PYH_CLK_SLOWDOWN;
-               AT_WRITE_REG(hw, REG_SERDES_LOCK, data);
-       }
        /* Load all of base address above */
        AT_WRITE_REG(hw, REG_LOAD_PTR, 1);
 }
@@ -1177,7 +1169,7 @@ static int atl1c_reset_mac(struct atl1c_hw *hw)
 {
        struct atl1c_adapter *adapter = (struct atl1c_adapter *)hw->adapter;
        struct pci_dev *pdev = adapter->pdev;
-       u32 master_ctrl_data = 0;
+       u32 ctrl_data = 0;
 
        AT_WRITE_REG(hw, REG_IMR, 0);
        AT_WRITE_REG(hw, REG_ISR, ISR_DIS_INT);
@@ -1189,10 +1181,9 @@ static int atl1c_reset_mac(struct atl1c_hw *hw)
         * the current PCI configuration.  The global reset bit is self-
         * clearing, and should clear within a microsecond.
         */
-       AT_READ_REG(hw, REG_MASTER_CTRL, &master_ctrl_data);
-       master_ctrl_data |= MASTER_CTRL_OOB_DIS;
-       AT_WRITE_REG(hw, REG_MASTER_CTRL,
-               master_ctrl_data | MASTER_CTRL_SOFT_RST);
+       AT_READ_REG(hw, REG_MASTER_CTRL, &ctrl_data);
+       ctrl_data |= MASTER_CTRL_OOB_DIS;
+       AT_WRITE_REG(hw, REG_MASTER_CTRL, ctrl_data | MASTER_CTRL_SOFT_RST);
 
        AT_WRITE_FLUSH(hw);
        msleep(10);
@@ -1204,7 +1195,28 @@ static int atl1c_reset_mac(struct atl1c_hw *hw)
                        " disabled for 10ms second\n");
                return -1;
        }
-       AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl_data);
+       AT_WRITE_REG(hw, REG_MASTER_CTRL, ctrl_data);
+
+       /* driver control speed/duplex */
+       AT_READ_REG(hw, REG_MAC_CTRL, &ctrl_data);
+       AT_WRITE_REG(hw, REG_MAC_CTRL, ctrl_data | MAC_CTRL_SPEED_MODE_SW);
+
+       /* clk switch setting */
+       AT_READ_REG(hw, REG_SERDES, &ctrl_data);
+       switch (hw->nic_type) {
+       case athr_l2c_b:
+               ctrl_data &= ~(SERDES_PHY_CLK_SLOWDOWN |
+                               SERDES_MAC_CLK_SLOWDOWN);
+               AT_WRITE_REG(hw, REG_SERDES, ctrl_data);
+               break;
+       case athr_l2c_b2:
+       case athr_l1d_2:
+               ctrl_data |= SERDES_PHY_CLK_SLOWDOWN | SERDES_MAC_CLK_SLOWDOWN;
+               AT_WRITE_REG(hw, REG_SERDES, ctrl_data);
+               break;
+       default:
+               break;
+       }
 
        return 0;
 }