pcie: host: tegra: adds pad powerdown programming

adds missing pad powerdown programming which is present
in pcie IAS doc

Bug 200069084
Bug 200044687

Change-Id: I3c69be6da8d849e9c203d3af0fb84b2ade4f09fe
Signed-off-by: Vidya Sagar <vidyas@nvidia.com>
Reviewed-on: http://git-master/r/778016
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

diff --git a/drivers/pci/host/pci-tegra.c b/drivers/pci/host/pci-tegra.c
index 0f6ff32506385f7a2b39efcfdd526bc788166b29..5c50062e0de2f4f6736e17dc59e4eac85f8eadcf 100644 (file)
--- a/drivers/pci/host/pci-tegra.c
+++ b/drivers/pci/host/pci-tegra.c
@@ -266,6 +266,17 @@
 #define NV_PCIE2_RP_VEND_XP_BIST                               0x00000F4C
 #define PCIE2_RP_VEND_XP_BIST_GOTO_L1_L2_AFTER_DLLP_DONE       (1 << 28)
 
+#define NV_PCIE2_RP_VEND_XP_PAD_PWRDN                  0x00000F50
+#define NV_PCIE2_RP_VEND_XP_PAD_PWRDN_L1_EN            (1 << 0)
+#define NV_PCIE2_RP_VEND_XP_PAD_PWRDN_DYNAMIC_EN               (1 << 1)
+#define NV_PCIE2_RP_VEND_XP_PAD_PWRDN_DISABLED_EN              (1 << 2)
+#define NV_PCIE2_RP_VEND_XP_PAD_PWRDN_L1_CLKREQ_EN     (1 << 15)
+#define NV_PCIE2_RP_VEND_XP_PAD_PWRDN_SLEEP_MODE_DYNAMIC_L1PP  (3 << 5)
+#define NV_PCIE2_RP_VEND_XP_PAD_PWRDN_SLEEP_MODE_L1_L1P        (2 << 3)
+#define NV_PCIE2_RP_VEND_XP_PAD_PWRDN_SLEEP_MODE_L1_L1PP       (3 << 3)
+#define NV_PCIE2_RP_VEND_XP_PAD_PWRDN_SLEEP_MODE_L1_CLKREQ_L1P (2 << 16)
+#define NV_PCIE2_RP_VEND_XP_PAD_PWRDN_SLEEP_MODE_L1_CLKREQ_L1PP        (3 << 16)
+
 #define NV_PCIE2_RP_PRIV_XP_RX_L0S_ENTRY_COUNT                 0x00000F8C
 #define NV_PCIE2_RP_PRIV_XP_TX_L0S_ENTRY_COUNT                 0x00000F90
 #define NV_PCIE2_RP_PRIV_XP_TX_L1_ENTRY_COUNT                  0x00000F94
@@ -1771,6 +1782,16 @@ static void tegra_pcie_apply_sw_war(struct tegra_pcie_port *port,
                data |= PCIE2_RP_VEND_CTL0_DSK_RST_PULSE_WIDTH;
                rp_writel(port, data, NV_PCIE2_RP_VEND_CTL0);
 
+               data = rp_readl(port, NV_PCIE2_RP_VEND_XP_PAD_PWRDN);
+               data |= NV_PCIE2_RP_VEND_XP_PAD_PWRDN_DISABLED_EN;
+               data |= NV_PCIE2_RP_VEND_XP_PAD_PWRDN_DYNAMIC_EN;
+               data |= NV_PCIE2_RP_VEND_XP_PAD_PWRDN_L1_EN;
+               data |= NV_PCIE2_RP_VEND_XP_PAD_PWRDN_L1_CLKREQ_EN;
+               data |= NV_PCIE2_RP_VEND_XP_PAD_PWRDN_SLEEP_MODE_DYNAMIC_L1PP;
+               data |= NV_PCIE2_RP_VEND_XP_PAD_PWRDN_SLEEP_MODE_L1_L1PP;
+               data |= NV_PCIE2_RP_VEND_XP_PAD_PWRDN_SLEEP_MODE_L1_CLKREQ_L1PP;
+               rp_writel(port, data, NV_PCIE2_RP_VEND_XP_PAD_PWRDN);
+
                /* Do timer settings only if clk25m freq equal to 19.2 MHz */
                if (clk_get_rate(clk_get_sys(NULL, "clk_m")) != 19200000)
                        return;
@@ -1826,6 +1847,16 @@ static void tegra_pcie_apply_sw_war(struct tegra_pcie_port *port,
                data = rp_readl(port, RP_VEND_XP);
                data |= RP_VEND_XP_UPDATE_FC_THRESHOLD;
                rp_writel(port, data, RP_VEND_XP);
+
+               data = rp_readl(port, NV_PCIE2_RP_VEND_XP_PAD_PWRDN);
+               data |= NV_PCIE2_RP_VEND_XP_PAD_PWRDN_DISABLED_EN;
+               data |= NV_PCIE2_RP_VEND_XP_PAD_PWRDN_DYNAMIC_EN;
+               data |= NV_PCIE2_RP_VEND_XP_PAD_PWRDN_L1_EN;
+               data |= NV_PCIE2_RP_VEND_XP_PAD_PWRDN_L1_CLKREQ_EN;
+               data |= NV_PCIE2_RP_VEND_XP_PAD_PWRDN_SLEEP_MODE_DYNAMIC_L1PP;
+               data |= NV_PCIE2_RP_VEND_XP_PAD_PWRDN_SLEEP_MODE_L1_L1P;
+               data |= NV_PCIE2_RP_VEND_XP_PAD_PWRDN_SLEEP_MODE_L1_CLKREQ_L1P;
+               rp_writel(port, data, NV_PCIE2_RP_VEND_XP_PAD_PWRDN);
 #endif
        }
 }