[TG3]: ASIC decoding and basic CPMU support.

Newer products change the way the ASIC revision is obtained.  This patch
implements how the driver will extract the revision number.

This patch also adds preliminary CPMU support.  CPMU stands for Central
Power Management Unit.  The CPMU's role is to put the chip into lower
power states when the operating conditions allow it.

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>

2 files changed, 22 insertions, 8 deletions

diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c
index 4f9fbe268ec9..482b7df55247 100644
--- a/drivers/net/tg3.c
+++ b/drivers/net/tg3.c
@@ -595,7 +595,8 @@ static void tg3_switch_clocks(struct tg3 *tp)
         u32 clock_ctrl = tr32(TG3PCI_CLOCK_CTRL);
         u32 orig_clock_ctrl;
 
-        if (tp->tg3_flags2 & TG3_FLG2_5780_CLASS)
+        if ((tp->tg3_flags & TG3_FLAG_CPMU_PRESENT) ||
+            (tp->tg3_flags2 & TG3_FLG2_5780_CLASS))
                 return;
 
         orig_clock_ctrl = clock_ctrl;
@@ -1400,6 +1401,7 @@ static int tg3_set_power_state(struct tg3 *tp, pci_power_t state)
                 tw32_wait_f(TG3PCI_CLOCK_CTRL, base_val | CLOCK_CTRL_ALTCLK |
                             CLOCK_CTRL_PWRDOWN_PLL133, 40);
         } else if ((tp->tg3_flags2 & TG3_FLG2_5780_CLASS) ||
+                   (tp->tg3_flags & TG3_FLAG_CPMU_PRESENT) ||
                    (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5906)) {
                 /* do nothing */
         } else if (!((tp->tg3_flags2 & TG3_FLG2_5750_PLUS) &&
@@ -6147,11 +6149,13 @@ static int tg3_reset_hw(struct tg3 *tp, int reset_phy)
         /* This works around an issue with Athlon chipsets on
          * B3 tigon3 silicon.  This bit has no effect on any
          * other revision.  But do not set this on PCI Express
-         * chips.
+         * chips and don't even touch the clocks if the CPMU is present.
          */
-        if (!(tp->tg3_flags2 & TG3_FLG2_PCI_EXPRESS))
-                tp->pci_clock_ctrl |= CLOCK_CTRL_DELAY_PCI_GRANT;
-        tw32_f(TG3PCI_CLOCK_CTRL, tp->pci_clock_ctrl);
+        if (!(tp->tg3_flags & TG3_FLAG_CPMU_PRESENT)) {
+                if (!(tp->tg3_flags2 & TG3_FLG2_PCI_EXPRESS))
+                        tp->pci_clock_ctrl |= CLOCK_CTRL_DELAY_PCI_GRANT;
+                tw32_f(TG3PCI_CLOCK_CTRL, tp->pci_clock_ctrl);
+        }
 
         if (tp->pci_chip_rev_id == CHIPREV_ID_5704_A0 &&
             (tp->tg3_flags & TG3_FLAG_PCIX_MODE)) {
@@ -10527,6 +10531,13 @@ static int __devinit tg3_get_invariants(struct tg3 *tp)
 
         tp->pci_chip_rev_id = (misc_ctrl_reg >>
                                MISC_HOST_CTRL_CHIPREV_SHIFT);
+        if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_USE_PROD_ID_REG) {
+                u32 prod_id_asic_rev;
+
+                pci_read_config_dword(tp->pdev, TG3PCI_PRODID_ASICREV,
+                                      &prod_id_asic_rev);
+                tp->pci_chip_rev_id = prod_id_asic_rev & PROD_ID_ASIC_REV_MASK;
+        }
 
         /* Wrong chip ID in 5752 A0. This code can be removed later
          * as A0 is not in production.
diff --git a/drivers/net/tg3.h b/drivers/net/tg3.h
index c4f845dd1e8b..79ce68cf836b 100644
--- a/drivers/net/tg3.h
+++ b/drivers/net/tg3.h
@@ -121,6 +121,7 @@
 #define   ASIC_REV_5755                  0x0a
 #define   ASIC_REV_5787                  0x0b
 #define   ASIC_REV_5906                  0x0c
+#define   ASIC_REV_USE_PROD_ID_REG       0x0f
 #define  GET_CHIP_REV(CHIP_REV_ID)      ((CHIP_REV_ID) >> 8)
 #define   CHIPREV_5700_AX                0x70
 #define   CHIPREV_5700_BX                0x71
@@ -214,7 +215,9 @@
 #define TG3PCI_DUAL_MAC_CTRL            0x000000b8
 #define  DUAL_MAC_CTRL_CH_MASK           0x00000003
 #define  DUAL_MAC_CTRL_ID                0x00000004
-/* 0xbc --> 0x100 unused */
+#define TG3PCI_PRODID_ASICREV           0x000000bc
+#define  PROD_ID_ASIC_REV_MASK           0x0fffffff
+/* 0xc0 --> 0x100 unused */
 
 /* 0x100 --> 0x200 unused */
 
@@ -2213,7 +2216,7 @@ struct tg3 {
 #define TG3_FLAG_JUMBO_RING_ENABLE      0x00800000
 #define TG3_FLAG_10_100_ONLY            0x01000000
 #define TG3_FLAG_PAUSE_AUTONEG          0x02000000
-
+#define TG3_FLAG_CPMU_PRESENT           0x04000000
 #define TG3_FLAG_40BIT_DMA_BUG          0x08000000
 #define TG3_FLAG_BROKEN_CHECKSUMS       0x10000000
 #define TG3_FLAG_SUPPORT_MSI            0x20000000
@@ -2285,7 +2288,7 @@ struct tg3 {
         u32                             pwrmgmt_thresh;
 
         /* PCI block */
-        u16                             pci_chip_rev_id;
+        u32                             pci_chip_rev_id;
         u8                              pci_cacheline_sz;
         u8                              pci_lat_timer;
         u8                              pci_hdr_type;