[TG3]: 5784 / 5764 GPHY power down fix

5784 and 5764 devices fail to link / pass traffic after one load /
unload cycle.  This happens because of a hardware bug in the new CPMU.
During normal operation, the MAC depends on the PHY clock being
available.  When the PHY is powered down, the clock the MAC depends on
is disabled.  The fix is to switch the MAC clock to an alternate source
before powering down the PHY, and to restore the MAC clock to the PHY
source upon device resume.

Signed-off-by: Matt Carlson <mcarlson@broadcom.com>
Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 8 insertions, 1 deletions

diff --git a/drivers/net/tg3.h b/drivers/net/tg3.h
index 1d5b2a3dd29d..4659697beb4b 100644
--- a/drivers/net/tg3.h
+++ b/drivers/net/tg3.h
@@ -109,6 +109,7 @@
 #define  CHIPREV_ID_5714_A2              0x9002
 #define  CHIPREV_ID_5906_A1              0xc001
 #define  CHIPREV_ID_5784_A0              0x5784000
+#define  CHIPREV_ID_5761_A0              0x5761000
 #define  GET_ASIC_REV(CHIP_REV_ID)      ((CHIP_REV_ID) >> 12)
 #define   ASIC_REV_5700                  0x07
 #define   ASIC_REV_5701                  0x00
@@ -856,7 +857,13 @@
 #define  CPMU_CTRL_LINK_IDLE_MODE        0x00000200
 #define  CPMU_CTRL_LINK_AWARE_MODE       0x00000400
 #define  CPMU_CTRL_LINK_SPEED_MODE       0x00004000
-/* 0x3604 --> 0x365c unused */
+/* 0x3604 --> 0x360c unused */
+
+#define TG3_CPMU_LSPD_1000MB_CLK        0x0000360c
+#define  CPMU_LSPD_1000MB_MACCLK_62_5    0x00000000
+#define  CPMU_LSPD_1000MB_MACCLK_12_5    0x00110000
+#define  CPMU_LSPD_1000MB_MACCLK_MASK    0x001f0000
+/* 0x3610 --> 0x365c unused */
 
 #define TG3_CPMU_MUTEX_REQ              0x0000365c
 #define  CPMU_MUTEX_REQ_DRIVER           0x00001000