jme: PHY Power control for new chip

After main chip rev 5, the hardware support more power saving
control registers.
Some Non-Linux drivers might turn off the phy power with new
interfaces, this patch makes it possible for Linux to turn it
on again.

Signed-off-by: Guo-Fu Tseng <cooldavid@cooldavid.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 106 insertions, 14 deletions

diff --git a/drivers/net/jme.c b/drivers/net/jme.c
index d44716e804b6..d446fdb89f68 100644
--- a/drivers/net/jme.c
+++ b/drivers/net/jme.c
@@ -1577,6 +1577,38 @@ jme_free_irq(struct jme_adapter *jme)
 }
 
 static inline void
+jme_new_phy_on(struct jme_adapter *jme)
+{
+        u32 reg;
+
+        reg = jread32(jme, JME_PHY_PWR);
+        reg &= ~(PHY_PWR_DWN1SEL | PHY_PWR_DWN1SW |
+                 PHY_PWR_DWN2 | PHY_PWR_CLKSEL);
+        jwrite32(jme, JME_PHY_PWR, reg);
+
+        pci_read_config_dword(jme->pdev, PCI_PRIV_PE1, &reg);
+        reg &= ~PE1_GPREG0_PBG;
+        reg |= PE1_GPREG0_ENBG;
+        pci_write_config_dword(jme->pdev, PCI_PRIV_PE1, reg);
+}
+
+static inline void
+jme_new_phy_off(struct jme_adapter *jme)
+{
+        u32 reg;
+
+        reg = jread32(jme, JME_PHY_PWR);
+        reg |= PHY_PWR_DWN1SEL | PHY_PWR_DWN1SW |
+               PHY_PWR_DWN2 | PHY_PWR_CLKSEL;
+        jwrite32(jme, JME_PHY_PWR, reg);
+
+        pci_read_config_dword(jme->pdev, PCI_PRIV_PE1, &reg);
+        reg &= ~PE1_GPREG0_PBG;
+        reg |= PE1_GPREG0_PDD3COLD;
+        pci_write_config_dword(jme->pdev, PCI_PRIV_PE1, reg);
+}
+
+static inline void
 jme_phy_on(struct jme_adapter *jme)
 {
         u32 bmcr;
@@ -1584,6 +1616,22 @@ jme_phy_on(struct jme_adapter *jme)
         bmcr = jme_mdio_read(jme->dev, jme->mii_if.phy_id, MII_BMCR);
         bmcr &= ~BMCR_PDOWN;
         jme_mdio_write(jme->dev, jme->mii_if.phy_id, MII_BMCR, bmcr);
+
+        if (new_phy_power_ctrl(jme->chip_main_rev))
+                jme_new_phy_on(jme);
+}
+
+static inline void
+jme_phy_off(struct jme_adapter *jme)
+{
+        u32 bmcr;
+
+        bmcr = jme_mdio_read(jme->dev, jme->mii_if.phy_id, MII_BMCR);
+        bmcr |= BMCR_PDOWN;
+        jme_mdio_write(jme->dev, jme->mii_if.phy_id, MII_BMCR, bmcr);
+
+        if (new_phy_power_ctrl(jme->chip_main_rev))
+                jme_new_phy_off(jme);
 }
 
 static int
@@ -1606,12 +1654,11 @@ jme_open(struct net_device *netdev)
 
         jme_start_irq(jme);
 
-        if (test_bit(JME_FLAG_SSET, &jme->flags)) {
-                jme_phy_on(jme);
+        jme_phy_on(jme);
+        if (test_bit(JME_FLAG_SSET, &jme->flags))
                 jme_set_settings(netdev, &jme->old_ecmd);
-        } else {
+        else
                 jme_reset_phy_processor(jme);
-        }
 
         jme_reset_link(jme);
 
@@ -1657,12 +1704,6 @@ jme_wait_link(struct jme_adapter *jme)
         }
 }
 
-static inline void
-jme_phy_off(struct jme_adapter *jme)
-{
-        jme_mdio_write(jme->dev, jme->mii_if.phy_id, MII_BMCR, BMCR_PDOWN);
-}
-
 static void
 jme_powersave_phy(struct jme_adapter *jme)
 {
@@ -3068,12 +3109,11 @@ jme_resume(struct pci_dev *pdev)
         jme_clear_pm(jme);
         pci_restore_state(pdev);
 
-        if (test_bit(JME_FLAG_SSET, &jme->flags)) {
-                jme_phy_on(jme);
+        jme_phy_on(jme);
+        if (test_bit(JME_FLAG_SSET, &jme->flags))
                 jme_set_settings(netdev, &jme->old_ecmd);
-        } else {
+        else
                 jme_reset_phy_processor(jme);
-        }
 
         jme_start_irq(jme);
         netif_device_attach(netdev);
diff --git a/drivers/net/jme.h b/drivers/net/jme.h
index 32b2a9ddbcd6..c3764fc151c9 100644
--- a/drivers/net/jme.h
+++ b/drivers/net/jme.h
@@ -103,6 +103,37 @@ enum jme_spi_op_bits {
 #define HALF_US 500     /* 500 ns */
 #define JMESPIIOCTL     SIOCDEVPRIVATE
 
+#define PCI_PRIV_PE1            0xE4
+
+enum pci_priv_pe1_bit_masks {
+        PE1_ASPMSUPRT   = 0x00000003, /*
+                                       * RW:
+                                       * Aspm_support[1:0]
+                                       * (R/W Port of 5C[11:10])
+                                       */
+        PE1_MULTIFUN    = 0x00000004, /* RW: Multi_fun_bit */
+        PE1_RDYDMA      = 0x00000008, /* RO: ~link.rdy_for_dma */
+        PE1_ASPMOPTL    = 0x00000030, /* RW: link.rx10s_option[1:0] */
+        PE1_ASPMOPTH    = 0x000000C0, /* RW: 10_req=[3]?HW:[2] */
+        PE1_GPREG0      = 0x0000FF00, /*
+                                       * SRW:
+                                       * Cfg_gp_reg0
+                                       * [7:6] phy_giga BG control
+                                       * [5] CREQ_N as CREQ_N1 (CPPE# as CREQ#)
+                                       * [4:0] Reserved
+                                       */
+        PE1_GPREG0_PBG  = 0x0000C000, /* phy_giga BG control */
+        PE1_GPREG1      = 0x00FF0000, /* RW: Cfg_gp_reg1 */
+        PE1_REVID       = 0xFF000000, /* RO: Rev ID */
+};
+
+enum pci_priv_pe1_values {
+        PE1_GPREG0_ENBG         = 0x00000000, /* en BG */
+        PE1_GPREG0_PDD3COLD     = 0x00004000, /* giga_PD + d3cold */
+        PE1_GPREG0_PDPCIESD     = 0x00008000, /* giga_PD + pcie_shutdown */
+        PE1_GPREG0_PDPCIEIDDQ   = 0x0000C000, /* giga_PD + pcie_iddq */
+};
+
 /*
  * Dynamic(adaptive)/Static PCC values
  */
@@ -499,6 +530,7 @@ enum jme_iomap_regs {
         JME_PMCS        = JME_MAC | 0x60, /* Power Management Control/Stat */
 
 
+        JME_PHY_PWR     = JME_PHY | 0x24, /* New PHY Power Ctrl Register */
         JME_PHY_CS      = JME_PHY | 0x28, /* PHY Ctrl and Status Register */
         JME_PHY_LINK    = JME_PHY | 0x30, /* PHY Link Status Register */
         JME_SMBCSR      = JME_PHY | 0x40, /* SMB Control and Status */
@@ -835,6 +867,21 @@ enum jme_pmcs_bit_masks {
 };
 
 /*
+ * New PHY Power Control Register
+ */
+enum jme_phy_pwr_bit_masks {
+        PHY_PWR_DWN1SEL = 0x01000000, /* Phy_giga.p_PWR_DOWN1_SEL */
+        PHY_PWR_DWN1SW  = 0x02000000, /* Phy_giga.p_PWR_DOWN1_SW */
+        PHY_PWR_DWN2    = 0x04000000, /* Phy_giga.p_PWR_DOWN2 */
+        PHY_PWR_CLKSEL  = 0x08000000, /*
+                                       * XTL_OUT Clock select
+                                       * (an internal free-running clock)
+                                       * 0: xtl_out = phy_giga.A_XTL25_O
+                                       * 1: xtl_out = phy_giga.PD_OSC
+                                       */
+};
+
+/*
  * Giga PHY Status Registers
  */
 enum jme_phy_link_bit_mask {
@@ -1191,6 +1238,11 @@ static inline int is_buggy250(unsigned short device, u8 chiprev)
         return device == PCI_DEVICE_ID_JMICRON_JMC250 && chiprev == 0x11;
 }
 
+static inline int new_phy_power_ctrl(u8 chip_main_rev)
+{
+        return chip_main_rev >= 5;
+}
+
 /*
  * Function prototypes
  */