net/phy: add IC+ IP101A and support APS.

This patch adds the IC+ IP101A Single port 10/100 PHY
and supports the APS (i.e. power saving mode while link is down)
for both IP1001 and IP101A (where this mode is supported).

Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 68 insertions, 11 deletions

diff --git a/drivers/net/phy/icplus.c b/drivers/net/phy/icplus.c
index d4cbc2922b23..6e344e59caf7 100644
--- a/drivers/net/phy/icplus.c
+++ b/drivers/net/phy/icplus.c
@@ -30,10 +30,17 @@
 #include <asm/irq.h>
 #include <asm/uaccess.h>
 
-MODULE_DESCRIPTION("ICPlus IP175C/IC1001 PHY drivers");
+MODULE_DESCRIPTION("ICPlus IP175C/IP101A/IC1001 PHY drivers");
 MODULE_AUTHOR("Michael Barkowski");
 MODULE_LICENSE("GPL");
 
+/* IP101A/IP1001 */
+#define IP10XX_SPEC_CTRL_STATUS         16  /* Spec. Control Register */
+#define IP1001_SPEC_CTRL_STATUS_2       20  /* IP1001 Spec. Control Reg 2 */
+#define IP1001_PHASE_SEL_MASK           3 /* IP1001 RX/TXPHASE_SEL */
+#define IP1001_APS_ON                   11  /* IP1001 APS Mode  bit */
+#define IP101A_APS_ON                   2   /* IP101A APS Mode bit */
+
 static int ip175c_config_init(struct phy_device *phydev)
 {
         int err, i;
@@ -89,27 +96,58 @@ static int ip175c_config_init(struct phy_device *phydev)
         return 0;
 }
 
-static int ip1001_config_init(struct phy_device *phydev)
+static int ip1xx_reset(struct phy_device *phydev)
 {
-        int err, value;
+        int err, bmcr;
 
         /* Software Reset PHY */
-        value = phy_read(phydev, MII_BMCR);
-        value |= BMCR_RESET;
-        err = phy_write(phydev, MII_BMCR, value);
+        bmcr = phy_read(phydev, MII_BMCR);
+        bmcr |= BMCR_RESET;
+        err = phy_write(phydev, MII_BMCR, bmcr);
         if (err < 0)
                 return err;
 
         do {
-                value = phy_read(phydev, MII_BMCR);
-        } while (value & BMCR_RESET);
+                bmcr = phy_read(phydev, MII_BMCR);
+        } while (bmcr & BMCR_RESET);
+
+        return err;
+}
+
+static int ip1001_config_init(struct phy_device *phydev)
+{
+        int c;
+
+        c = ip1xx_reset(phydev);
+        if (c < 0)
+                return c;
+
+        /* Enable Auto Power Saving mode */
+        c = phy_read(phydev, IP1001_SPEC_CTRL_STATUS_2);
+        c |= IP1001_APS_ON;
+        if (c < 0)
+                return c;
 
         /* Additional delay (2ns) used to adjust RX clock phase
          * at GMII/ RGMII interface */
-        value = phy_read(phydev, 16);
-        value |= 0x3;
+        c = phy_read(phydev, IP10XX_SPEC_CTRL_STATUS);
+        c |= IP1001_PHASE_SEL_MASK;
+
+        return phy_write(phydev, IP10XX_SPEC_CTRL_STATUS, c);
+}
+
+static int ip101a_config_init(struct phy_device *phydev)
+{
+        int c;
 
-        return phy_write(phydev, 16, value);
+        c = ip1xx_reset(phydev);
+        if (c < 0)
+                return c;
+
+        /* Enable Auto Power Saving mode */
+        c = phy_read(phydev, IP10XX_SPEC_CTRL_STATUS);
+        c |= IP101A_APS_ON;
+        return c;
 }
 
 static int ip175c_read_status(struct phy_device *phydev)
@@ -158,6 +196,20 @@ static struct phy_driver ip1001_driver = {
         .driver         = { .owner = THIS_MODULE,},
 };
 
+static struct phy_driver ip101a_driver = {
+        .phy_id         = 0x02430c54,
+        .name           = "ICPlus IP101A",
+        .phy_id_mask    = 0x0ffffff0,
+        .features       = PHY_BASIC_FEATURES | SUPPORTED_Pause |
+                          SUPPORTED_Asym_Pause,
+        .config_init    = &ip101a_config_init,
+        .config_aneg    = &genphy_config_aneg,
+        .read_status    = &genphy_read_status,
+        .suspend        = genphy_suspend,
+        .resume         = genphy_resume,
+        .driver         = { .owner = THIS_MODULE,},
+};
+
 static int __init icplus_init(void)
 {
         int ret = 0;
@@ -166,12 +218,17 @@ static int __init icplus_init(void)
         if (ret < 0)
                 return -ENODEV;
 
+        ret = phy_driver_register(&ip101a_driver);
+        if (ret < 0)
+                return -ENODEV;
+
         return phy_driver_register(&ip175c_driver);
 }
 
 static void __exit icplus_exit(void)
 {
         phy_driver_unregister(&ip1001_driver);
+        phy_driver_unregister(&ip101a_driver);
         phy_driver_unregister(&ip175c_driver);
 }