ipq806x: copy files to kernel 5.4

Copy files to kernel 5.4 to start porting.

Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>

1 files changed, 124 insertions, 0 deletions

diff --git a/target/linux/ipq806x/patches-5.4/0071-3-PCI-qcom-Fixed-IPQ806x-PCIE-init-changes.patch b/target/linux/ipq806x/patches-5.4/0071-3-PCI-qcom-Fixed-IPQ806x-PCIE-init-changes.patch
new file mode 100644
index 0000000000..dde8fbaa7b
--- /dev/null
+++ b/target/linux/ipq806x/patches-5.4/0071-3-PCI-qcom-Fixed-IPQ806x-PCIE-init-changes.patch
@@ -0,0 +1,124 @@
+From eddd13215d0f2b549ebc5f0e8796d5b1231f90a0 Mon Sep 17 00:00:00 2001
+From: Sham Muthayyan <smuthayy@codeaurora.org>
+Date: Tue, 19 Jul 2016 19:58:22 +0530
+Subject: PCI: qcom: Fixed IPQ806x PCIE init changes
+
+Change-Id: Ic319b1aec27a47809284759f8fcb6a8815b7cf7e
+Signed-off-by: Sham Muthayyan <smuthayy@codeaurora.org>
+---
+
+--- a/drivers/pci/controller/dwc/pcie-qcom.c
++++ b/drivers/pci/controller/dwc/pcie-qcom.c
+@@ -45,7 +45,13 @@
+ #define PCIE_CAP_CPL_TIMEOUT_DISABLE		0x10
+ 
+ #define PCIE20_PARF_PHY_CTRL			0x40
++#define PHY_CTRL_PHY_TX0_TERM_OFFSET_MASK	(0x1f << 16)
++#define PHY_CTRL_PHY_TX0_TERM_OFFSET(x)		(x << 16)
++
+ #define PCIE20_PARF_PHY_REFCLK			0x4C
++#define REF_SSP_EN				BIT(16)
++#define REF_USE_PAD				BIT(12)
++
+ #define PCIE20_PARF_DBI_BASE_ADDR		0x168
+ #define PCIE20_PARF_SLV_ADDR_SPACE_SIZE		0x16C
+ #define PCIE20_PARF_MHI_CLOCK_RESET_CTRL	0x174
+@@ -76,6 +82,18 @@
+ #define DBI_RO_WR_EN				1
+ 
+ #define PERST_DELAY_US				1000
++/* PARF registers */
++#define PCIE20_PARF_PCS_DEEMPH			0x34
++#define PCS_DEEMPH_TX_DEEMPH_GEN1(x)		(x << 16)
++#define PCS_DEEMPH_TX_DEEMPH_GEN2_3_5DB(x)	(x << 8)
++#define PCS_DEEMPH_TX_DEEMPH_GEN2_6DB(x)	(x << 0)
++
++#define PCIE20_PARF_PCS_SWING			0x38
++#define PCS_SWING_TX_SWING_FULL(x)		(x << 8)
++#define PCS_SWING_TX_SWING_LOW(x)		(x << 0)
++
++#define PCIE20_PARF_CONFIG_BITS			0x50
++#define PHY_RX0_EQ(x)				(x << 24)
+ 
+ #define PCIE20_v3_PARF_SLV_ADDR_SPACE_SIZE	0x358
+ #define SLV_ADDR_SPACE_SZ			0x10000000
+@@ -94,6 +112,7 @@ struct qcom_pcie_resources_2_1_0 {
+ 	struct reset_control *phy_reset;
+ 	struct reset_control *ext_reset;
+ 	struct regulator_bulk_data supplies[QCOM_PCIE_2_1_0_MAX_SUPPLY];
++	uint8_t phy_tx0_term_offset;
+ };
+ 
+ struct qcom_pcie_resources_1_0_0 {
+@@ -173,6 +192,16 @@ struct qcom_pcie {
+ 
+ #define to_qcom_pcie(x)		dev_get_drvdata((x)->dev)
+ 
++static inline void
++writel_masked(void __iomem *addr, u32 clear_mask, u32 set_mask)
++{
++	u32 val = readl(addr);
++
++	val &= ~clear_mask;
++	val |= set_mask;
++	writel(val, addr);
++}
++
+ static void qcom_ep_reset_assert(struct qcom_pcie *pcie)
+ {
+ 	gpiod_set_value_cansleep(pcie->reset, 1);
+@@ -266,6 +295,10 @@ static int qcom_pcie_get_resources_2_1_0
+ 	if (IS_ERR(res->ext_reset))
+ 		return PTR_ERR(res->ext_reset);
+ 
++	if (of_property_read_u8(dev->of_node, "phy-tx0-term-offset",
++				&res->phy_tx0_term_offset))
++		res->phy_tx0_term_offset = 0;
++
+ 	res->phy_reset = devm_reset_control_get_exclusive(dev, "phy");
+ 	return PTR_ERR_OR_ZERO(res->phy_reset);
+ }
+@@ -293,7 +326,6 @@ static int qcom_pcie_init_2_1_0(struct q
+ 	struct qcom_pcie_resources_2_1_0 *res = &pcie->res.v2_1_0;
+ 	struct dw_pcie *pci = pcie->pci;
+ 	struct device *dev = pci->dev;
+-	u32 val;
+ 	int ret;
+ 
+ 	ret = reset_control_assert(res->ahb_reset);
+@@ -350,15 +382,26 @@ static int qcom_pcie_init_2_1_0(struct q
+ 		goto err_deassert_ahb;
+ 	}
+ 
+-	/* enable PCIe clocks and resets */
+-	val = readl(pcie->parf + PCIE20_PARF_PHY_CTRL);
+-	val &= ~BIT(0);
+-	writel(val, pcie->parf + PCIE20_PARF_PHY_CTRL);
+-
+-	/* enable external reference clock */
+-	val = readl(pcie->parf + PCIE20_PARF_PHY_REFCLK);
+-	val |= BIT(16);
+-	writel(val, pcie->parf + PCIE20_PARF_PHY_REFCLK);
++	writel_masked(pcie->parf + PCIE20_PARF_PHY_CTRL, BIT(0), 0);
++
++	/* Set Tx termination offset */
++	writel_masked(pcie->parf + PCIE20_PARF_PHY_CTRL,
++		      PHY_CTRL_PHY_TX0_TERM_OFFSET_MASK,
++		      PHY_CTRL_PHY_TX0_TERM_OFFSET(res->phy_tx0_term_offset));
++
++	/* PARF programming */
++	writel(PCS_DEEMPH_TX_DEEMPH_GEN1(0x18) |
++	       PCS_DEEMPH_TX_DEEMPH_GEN2_3_5DB(0x18) |
++	       PCS_DEEMPH_TX_DEEMPH_GEN2_6DB(0x22),
++	       pcie->parf + PCIE20_PARF_PCS_DEEMPH);
++	writel(PCS_SWING_TX_SWING_FULL(0x78) |
++	       PCS_SWING_TX_SWING_LOW(0x78),
++	       pcie->parf + PCIE20_PARF_PCS_SWING);
++	writel(PHY_RX0_EQ(0x4), pcie->parf + PCIE20_PARF_CONFIG_BITS);
++
++	/* Enable reference clock */
++	writel_masked(pcie->parf + PCIE20_PARF_PHY_REFCLK,
++		      REF_USE_PAD, REF_SSP_EN);
+ 
+ 	ret = reset_control_deassert(res->phy_reset);
+ 	if (ret) {