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ipq806x: replace pci patchset with upstream version 

Changes:
- Update patches
- Update dts with new binding
    Tx term offset dropped and replaced with a new compatible

Removed:
- 0071-5-PCI-qcom-Programming-the-PCIE-iATU-for-IPQ806x
    Pci init does the same exact thing (was needed in older kernel version)
- 0071-7-pcie-Set-PCIE-MRRS-and-MPS-to-256B
    Rejected upstream, can't find any reason to have this. No regression with
    testing it on R7800.

Tested on R7800 (ipq8065), R7500 v2 ("ipq8064-v2")

Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
Tested-by: Paul Blazejowski <paulb@blazebox.homeip.net> [R7800]
[rebase and refresh]
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
master
Ansuel Smith 2020-08-08 16:50:04 +02:00 committed by Adrian Schmutzler
parent ba2ddba56b
commit 58d2bd88ae
30 changed files with 628 additions and 580 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
target/linux/ipq806x/files-5.4/arch/arm/boot/dts/qcom-ipq8064-ap148.dts
View File

@ -48,7 +48,7 @@
&pcie1 {
status = "okay";
force_gen1 = <1>;
max-link-speed = <1>;
};
&nand_controller {

2
target/linux/ipq806x/files-5.4/arch/arm/boot/dts/qcom-ipq8064-ap161.dts
View File

@ -56,7 +56,7 @@
&pcie1 {
status = "okay";
force_gen1 = <1>;
max-link-speed = <1>;
};
&pcie2 {

2
target/linux/ipq806x/files-5.4/arch/arm/boot/dts/qcom-ipq8064-c2600.dts
View File

@ -355,7 +355,7 @@
&pcie1 {
status = "okay";
force_gen1 = <1>;
max-link-speed = <1>;
};
&mdio0 {

2
target/linux/ipq806x/files-5.4/arch/arm/boot/dts/qcom-ipq8064-d7800.dts
View File

@ -176,7 +176,7 @@
reset-gpio = <&qcom_pinmux 48 GPIO_ACTIVE_HIGH>;
pinctrl-0 = <&pcie1_pins>;
pinctrl-names = "default";
force_gen1 = <1>;
max-link-speed = <1>;
};
&nand_controller {

2
target/linux/ipq806x/files-5.4/arch/arm/boot/dts/qcom-ipq8064-eax500.dtsi
View File

@ -23,7 +23,7 @@
&pcie0 {
status = "okay";
force_gen1 = <1>;
max-link-speed = <1>;
};
&pcie1 {

2
target/linux/ipq806x/files-5.4/arch/arm/boot/dts/qcom-ipq8064-r7500.dts
View File

@ -157,7 +157,7 @@
&pcie1 {
status = "okay";
force_gen1 = <1>;
max-link-speed = <1>;
};
&nand_controller {

2
target/linux/ipq806x/files-5.4/arch/arm/boot/dts/qcom-ipq8064-r7500v2.dts
View File

@ -187,7 +187,7 @@
reset-gpio = <&qcom_pinmux 48 GPIO_ACTIVE_LOW>;
pinctrl-0 = <&pcie1_pins>;
pinctrl-names = "default";
force_gen1 = <1>;
max-link-speed = <1>;
};
&nand_controller {

6
target/linux/ipq806x/files-5.4/arch/arm/boot/dts/qcom-ipq8064-v2.0.dtsi
View File

@ -41,15 +41,15 @@
};
&pcie0 {
phy-tx0-term-offset = <0>;
compatible = "qcom,pcie-ipq8064-v2";
};
&pcie1 {
phy-tx0-term-offset = <0>;
compatible = "qcom,pcie-ipq8064-v2";
};
&pcie2 {
phy-tx0-term-offset = <0>;
compatible = "qcom,pcie-ipq8064-v2";
};
&sata {

2
target/linux/ipq806x/files-5.4/arch/arm/boot/dts/qcom-ipq8064-vr2600v.dts
View File

@ -278,7 +278,7 @@
&pcie1 {
status = "okay";
force_gen1 = <1>;
max-link-speed = <1>;
};
&mdio0 {

2
target/linux/ipq806x/files-5.4/arch/arm/boot/dts/qcom-ipq8064-wg2600hp.dts
View File

@ -310,7 +310,7 @@
&pcie1 {
status = "okay";
force_gen1 = <1>;
max-link-speed = <1>;
};
&qcom_pinmux {

2
target/linux/ipq806x/files-5.4/arch/arm/boot/dts/qcom-ipq8064-wxr-2533dhp.dts
View File

@ -381,7 +381,7 @@
&pcie1 {
status = "okay";
force_gen1 = <1>;
max-link-speed = <1>;
};
&qcom_pinmux {

2
target/linux/ipq806x/files-5.4/arch/arm/boot/dts/qcom-ipq8065-nbg6817.dts
View File

@ -214,7 +214,7 @@
reset-gpio = <&qcom_pinmux 48 GPIO_ACTIVE_LOW>;
pinctrl-0 = <&pcie1_pins>;
pinctrl-names = "default";
force_gen1 = <1>;
max-link-speed = <1>;
};
&mdio0 {

2
target/linux/ipq806x/files-5.4/arch/arm/boot/dts/qcom-ipq8065-r7800.dts
View File

@ -430,7 +430,7 @@
&pcie1 {
status = "okay";
force_gen1 = <1>;
max-link-speed = <1>;
bridge@0,0 {
reg = <0x00000000 0 0 0 0>;

6
target/linux/ipq806x/files-5.4/arch/arm/boot/dts/qcom-ipq8065.dtsi
View File

@ -46,15 +46,15 @@
};
&pcie0 {
phy-tx0-term-offset = <0>;
compatible = "qcom,pcie-ipq8064-v2";
};
&pcie1 {
phy-tx0-term-offset = <0>;
compatible = "qcom,pcie-ipq8064-v2";
};
&pcie2 {
phy-tx0-term-offset = <0>;
compatible = "qcom,pcie-ipq8064-v2";
};
&sata {

62
target/linux/ipq806x/patches-5.4/0071-2-PCI-qcom-Fixed-IPQ806x-PCIE-reset-changes.patch
View File

@ -1,62 +0,0 @@
From 490d103232287eb51c92c49a4ef8865fd0a9d59e Mon Sep 17 00:00:00 2001
From: Sham Muthayyan <smuthayy@codeaurora.org>
Date: Tue, 19 Jul 2016 18:58:18 +0530
Subject: PCI: qcom: Fixed IPQ806x PCIE reset changes
Change-Id: Ia6590e960b9754b1e8b7a51f318788cd63e9e321
Signed-off-by: Sham Muthayyan <smuthayy@codeaurora.org>
---
--- a/drivers/pci/controller/dwc/pcie-qcom.c
+++ b/drivers/pci/controller/dwc/pcie-qcom.c
@@ -92,6 +92,7 @@ struct qcom_pcie_resources_2_1_0 {
struct reset_control *ahb_reset;
struct reset_control *por_reset;
struct reset_control *phy_reset;
+ struct reset_control *ext_reset;
struct regulator_bulk_data supplies[QCOM_PCIE_2_1_0_MAX_SUPPLY];
};
@@ -261,6 +262,10 @@ static int qcom_pcie_get_resources_2_1_0
if (IS_ERR(res->por_reset))
return PTR_ERR(res->por_reset);
+ res->ext_reset = devm_reset_control_get(dev, "ext");
+ if (IS_ERR(res->ext_reset))
+ return PTR_ERR(res->ext_reset);
+
res->phy_reset = devm_reset_control_get_exclusive(dev, "phy");
return PTR_ERR_OR_ZERO(res->phy_reset);
}
@@ -274,6 +279,7 @@ static void qcom_pcie_deinit_2_1_0(struc
reset_control_assert(res->ahb_reset);
reset_control_assert(res->por_reset);
reset_control_assert(res->pci_reset);
+ reset_control_assert(res->ext_reset);
clk_disable_unprepare(res->iface_clk);
clk_disable_unprepare(res->core_clk);
clk_disable_unprepare(res->phy_clk);
@@ -290,15 +296,21 @@ static int qcom_pcie_init_2_1_0(struct q
u32 val;
int ret;
+ ret = reset_control_assert(res->ahb_reset);
+ if (ret) {
+ dev_err(dev, "cannot assert ahb reset\n");
+ return ret;
+ }
+
ret = regulator_bulk_enable(ARRAY_SIZE(res->supplies), res->supplies);
if (ret < 0) {
dev_err(dev, "cannot enable regulators\n");
return ret;
}
- ret = reset_control_assert(res->ahb_reset);
+ ret = reset_control_deassert(res->ext_reset);
if (ret) {
- dev_err(dev, "cannot assert ahb reset\n");
+ dev_err(dev, "cannot assert ext reset\n");
goto err_assert_ahb;
}

124
target/linux/ipq806x/patches-5.4/0071-3-PCI-qcom-Fixed-IPQ806x-PCIE-init-changes.patch
View File

@ -1,124 +0,0 @@
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) {

112
target/linux/ipq806x/patches-5.4/0071-5-PCI-qcom-Programming-the-PCIE-iATU-for-IPQ806x.patch
View File

@ -1,112 +0,0 @@
From d27c303e828d7e42f339a459d2abfe30c51698e9 Mon Sep 17 00:00:00 2001
From: Sham Muthayyan <smuthayy@codeaurora.org>
Date: Tue, 26 Jul 2016 12:28:31 +0530
Subject: PCI: qcom: Programming the PCIE iATU for IPQ806x
Resolved PCIE EP detection errors caused due to missing iATU programming.
Change-Id: Ie95c0f8cb940abc0192a8a3c4e825ddba54b72fe
Signed-off-by: Sham Muthayyan <smuthayy@codeaurora.org>
---
--- a/drivers/pci/controller/dwc/pcie-qcom.c
+++ b/drivers/pci/controller/dwc/pcie-qcom.c
@@ -76,6 +76,30 @@
#define PCIE20_CAP_LINK_1 (PCIE20_CAP + 0x14)
#define PCIE_CAP_LINK1_VAL 0x2FD7F
+#define PCIE20_CAP_LINKCTRLSTATUS (PCIE20_CAP + 0x10)
+
+#define PCIE20_AXI_MSTR_RESP_COMP_CTRL0 0x818
+#define PCIE20_AXI_MSTR_RESP_COMP_CTRL1 0x81c
+
+#define PCIE20_PLR_IATU_VIEWPORT 0x900
+#define PCIE20_PLR_IATU_REGION_OUTBOUND (0x0 << 31)
+#define PCIE20_PLR_IATU_REGION_INDEX(x) (x << 0)
+
+#define PCIE20_PLR_IATU_CTRL1 0x904
+#define PCIE20_PLR_IATU_TYPE_CFG0 (0x4 << 0)
+#define PCIE20_PLR_IATU_TYPE_MEM (0x0 << 0)
+
+#define PCIE20_PLR_IATU_CTRL2 0x908
+#define PCIE20_PLR_IATU_ENABLE BIT(31)
+
+#define PCIE20_PLR_IATU_LBAR 0x90C
+#define PCIE20_PLR_IATU_UBAR 0x910
+#define PCIE20_PLR_IATU_LAR 0x914
+#define PCIE20_PLR_IATU_LTAR 0x918
+#define PCIE20_PLR_IATU_UTAR 0x91c
+
+#define MSM_PCIE_DEV_CFG_ADDR 0x01000000
+
#define PCIE20_PARF_Q2A_FLUSH 0x1AC
#define PCIE20_MISC_CONTROL_1_REG 0x8BC
@@ -240,6 +264,57 @@ static void qcom_pcie_2_1_0_ltssm_enable
writel(val, pcie->elbi + PCIE20_ELBI_SYS_CTRL);
}
+static void qcom_pcie_prog_viewport_cfg0(struct qcom_pcie *pcie, u32 busdev)
+{
+ struct pcie_port *pp = &pcie->pci->pp;
+
+ /*
+ * program and enable address translation region 0 (device config
+ * address space); region type config;
+ * axi config address range to device config address range
+ */
+ writel(PCIE20_PLR_IATU_REGION_OUTBOUND |
+ PCIE20_PLR_IATU_REGION_INDEX(0),
+ pcie->pci->dbi_base + PCIE20_PLR_IATU_VIEWPORT);
+
+ writel(PCIE20_PLR_IATU_TYPE_CFG0, pcie->pci->dbi_base + PCIE20_PLR_IATU_CTRL1);
+ writel(PCIE20_PLR_IATU_ENABLE, pcie->pci->dbi_base + PCIE20_PLR_IATU_CTRL2);
+ writel(pp->cfg0_base, pcie->pci->dbi_base + PCIE20_PLR_IATU_LBAR);
+ writel((pp->cfg0_base >> 32), pcie->pci->dbi_base + PCIE20_PLR_IATU_UBAR);
+ writel((pp->cfg0_base + pp->cfg0_size - 1),
+ pcie->pci->dbi_base + PCIE20_PLR_IATU_LAR);
+ writel(busdev, pcie->pci->dbi_base + PCIE20_PLR_IATU_LTAR);
+ writel(0, pcie->pci->dbi_base + PCIE20_PLR_IATU_UTAR);
+}
+
+static void qcom_pcie_prog_viewport_mem2_outbound(struct qcom_pcie *pcie)
+{
+ struct pcie_port *pp = &pcie->pci->pp;
+
+ /*
+ * program and enable address translation region 2 (device resource
+ * address space); region type memory;
+ * axi device bar address range to device bar address range
+ */
+ writel(PCIE20_PLR_IATU_REGION_OUTBOUND |
+ PCIE20_PLR_IATU_REGION_INDEX(2),
+ pcie->pci->dbi_base + PCIE20_PLR_IATU_VIEWPORT);
+
+ writel(PCIE20_PLR_IATU_TYPE_MEM, pcie->pci->dbi_base + PCIE20_PLR_IATU_CTRL1);
+ writel(PCIE20_PLR_IATU_ENABLE, pcie->pci->dbi_base + PCIE20_PLR_IATU_CTRL2);
+ writel(pp->mem_base, pcie->pci->dbi_base + PCIE20_PLR_IATU_LBAR);
+ writel((pp->mem_base >> 32), pcie->pci->dbi_base + PCIE20_PLR_IATU_UBAR);
+ writel(pp->mem_base + pp->mem_size - 1,
+ pcie->pci->dbi_base + PCIE20_PLR_IATU_LAR);
+ writel(pp->mem_bus_addr, pcie->pci->dbi_base + PCIE20_PLR_IATU_LTAR);
+ writel(upper_32_bits(pp->mem_bus_addr),
+ pcie->pci->dbi_base + PCIE20_PLR_IATU_UTAR);
+
+ /* 256B PCIE buffer setting */
+ writel(0x1, pcie->pci->dbi_base + PCIE20_AXI_MSTR_RESP_COMP_CTRL0);
+ writel(0x1, pcie->pci->dbi_base + PCIE20_AXI_MSTR_RESP_COMP_CTRL1);
+}
+
static int qcom_pcie_get_resources_2_1_0(struct qcom_pcie *pcie)
{
struct qcom_pcie_resources_2_1_0 *res = &pcie->res.v2_1_0;
@@ -437,6 +512,9 @@ static int qcom_pcie_init_2_1_0(struct q
writel(CFG_BRIDGE_SB_INIT,
pci->dbi_base + PCIE20_AXI_MSTR_RESP_COMP_CTRL1);
+ qcom_pcie_prog_viewport_cfg0(pcie, MSM_PCIE_DEV_CFG_ADDR);
+ qcom_pcie_prog_viewport_mem2_outbound(pcie);
+
return 0;
err_deassert_ahb:

59
target/linux/ipq806x/patches-5.4/0071-6-PCI-qcom-Force-GEN1-support.patch
View File

@ -1,59 +0,0 @@
From 4910cfd150342ec7b038892262923c725a9c4001 Mon Sep 17 00:00:00 2001
From: Sham Muthayyan <smuthayy@codeaurora.org>
Date: Wed, 7 Sep 2016 16:44:28 +0530
Subject: PCI: qcom: Force GEN1 support
Change-Id: Ica54ddb737d7b851469deab1745f54bf431bd3f0
Signed-off-by: Sham Muthayyan <smuthayy@codeaurora.org>
---
--- a/drivers/pci/controller/dwc/pcie-qcom.c
+++ b/drivers/pci/controller/dwc/pcie-qcom.c
@@ -122,6 +122,8 @@
#define PCIE20_v3_PARF_SLV_ADDR_SPACE_SIZE 0x358
#define SLV_ADDR_SPACE_SZ 0x10000000
+#define PCIE20_LNK_CONTROL2_LINK_STATUS2 0xA0
+
#define QCOM_PCIE_2_1_0_MAX_SUPPLY 3
struct qcom_pcie_resources_2_1_0 {
struct clk *iface_clk;
@@ -212,6 +214,7 @@ struct qcom_pcie {
struct phy *phy;
struct gpio_desc *reset;
const struct qcom_pcie_ops *ops;
+ uint32_t force_gen1;
};
#define to_qcom_pcie(x) dev_get_drvdata((x)->dev)
@@ -504,6 +507,11 @@ static int qcom_pcie_init_2_1_0(struct q
/* wait for clock acquisition */
usleep_range(1000, 1500);
+ if (pcie->force_gen1) {
+ writel_relaxed((readl_relaxed(
+ pcie->pci->dbi_base + PCIE20_LNK_CONTROL2_LINK_STATUS2) | 1),
+ pcie->pci->dbi_base + PCIE20_LNK_CONTROL2_LINK_STATUS2);
+ }
/* Set the Max TLP size to 2K, instead of using default of 4K */
@@ -1340,6 +1348,8 @@ static int qcom_pcie_probe(struct platfo
struct dw_pcie *pci;
struct qcom_pcie *pcie;
int ret;
+ uint32_t force_gen1 = 0;
+ struct device_node *np = pdev->dev.of_node;
pcie = devm_kzalloc(dev, sizeof(*pcie), GFP_KERNEL);
if (!pcie)
@@ -1370,6 +1380,9 @@ static int qcom_pcie_probe(struct platfo
goto err_pm_runtime_put;
}
+ of_property_read_u32(np, "force_gen1", &force_gen1);
+ pcie->force_gen1 = force_gen1;
+
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "parf");
pcie->parf = devm_ioremap_resource(dev, res);
if (IS_ERR(pcie->parf)) {

69
target/linux/ipq806x/patches-5.4/0071-7-pcie-Set-PCIE-MRRS-and-MPS-to-256B.patch
View File

@ -1,69 +0,0 @@
From edff8f777c6321ca89bb950a382f409c4a126e28 Mon Sep 17 00:00:00 2001
From: Gokul Sriram Palanisamy <gpalan@codeaurora.org>
Date: Thu, 15 Dec 2016 17:38:18 +0530
Subject: pcie: Set PCIE MRRS and MPS to 256B
Set Max Read Request Size and Max Payload Size to 256 bytes,
per chip team recommendation.
Change-Id: I097004be2ced1b3096ffc10c318aae0b2bb155e8
Signed-off-by: Gokul Sriram Palanisamy <gpalan@codeaurora.org>
---
drivers/pci/host/pcie-qcom.c | 37 +++++++++++++++++++++++++++++++++++++
1 file changed, 37 insertions(+)
(limited to 'drivers/pci/host/pcie-qcom.c')
--- a/drivers/pci/controller/dwc/pcie-qcom.c
+++ b/drivers/pci/controller/dwc/pcie-qcom.c
@@ -124,6 +124,14 @@
#define PCIE20_LNK_CONTROL2_LINK_STATUS2 0xA0
+#define __set(v, a, b) (((v) << (b)) & GENMASK(a, b))
+#define __mask(a, b) (((1 << ((a) + 1)) - 1) & ~((1 << (b)) - 1))
+#define PCIE20_DEV_CAS 0x78
+#define PCIE20_MRRS_MASK __mask(14, 12)
+#define PCIE20_MRRS(x) __set(x, 14, 12)
+#define PCIE20_MPS_MASK __mask(7, 5)
+#define PCIE20_MPS(x) __set(x, 7, 5)
+
#define QCOM_PCIE_2_1_0_MAX_SUPPLY 3
struct qcom_pcie_resources_2_1_0 {
struct clk *iface_clk;
@@ -1448,6 +1456,35 @@ err_pm_runtime_put:
return ret;
}
+static void qcom_pcie_fixup_final(struct pci_dev *dev)
+{
+ int cap, err;
+ u16 ctl, reg_val;
+
+ cap = pci_pcie_cap(dev);
+ if (!cap)
+ return;
+
+ err = pci_read_config_word(dev, cap + PCI_EXP_DEVCTL, &ctl);
+
+ if (err)
+ return;
+
+ reg_val = ctl;
+
+ if (((reg_val & PCIE20_MRRS_MASK) >> 12) > 1)
+ reg_val = (reg_val & ~(PCIE20_MRRS_MASK)) | PCIE20_MRRS(0x1);
+
+ if (((ctl & PCIE20_MPS_MASK) >> 5) > 1)
+ reg_val = (reg_val & ~(PCIE20_MPS_MASK)) | PCIE20_MPS(0x1);
+
+ err = pci_write_config_word(dev, cap + PCI_EXP_DEVCTL, reg_val);
+
+ if (err)
+ pr_err("pcie config write failed %d\n", err);
+}
+DECLARE_PCI_FIXUP_FINAL(PCI_ANY_ID, PCI_ANY_ID, qcom_pcie_fixup_final);
+
static const struct of_device_id qcom_pcie_match[] = {
{ .compatible = "qcom,pcie-apq8084", .data = &ops_1_0_0 },
{ .compatible = "qcom,pcie-ipq8064", .data = &ops_2_1_0 },

91
target/linux/ipq806x/patches-5.4/0071-8-pcie-qcom-Fixed-pcie_phy_clk-branch-issue.patch
View File

@ -1,91 +0,0 @@
From b74bab6186131eea09459eedf5d737645a3559c9 Mon Sep 17 00:00:00 2001
From: Abhishek Sahu <absahu@codeaurora.org>
Date: Thu, 22 Dec 2016 11:18:45 +0530
Subject: pcie: qcom: Fixed pcie_phy_clk branch issue
Following backtraces are observed in PCIe deinit operation.
Hardware name: Qualcomm (Flattened Device Tree)
(unwind_backtrace) from [] (show_stack+0x10/0x14)
(show_stack) from [] (dump_stack+0x84/0x98)
(dump_stack) from [] (warn_slowpath_common+0x9c/0xb8)
(warn_slowpath_common) from [] (warn_slowpath_fmt+0x30/0x40)
(warn_slowpath_fmt) from [] (clk_branch_wait+0x114/0x120)
(clk_branch_wait) from [] (clk_core_disable+0xd0/0x1f4)
(clk_core_disable) from [] (clk_disable+0x24/0x30)
(clk_disable) from [] (qcom_pcie_deinit_v0+0x6c/0xb8)
(qcom_pcie_deinit_v0) from [] (qcom_pcie_host_init+0xe0/0xe8)
(qcom_pcie_host_init) from [] (dw_pcie_host_init+0x3b0/0x538)
(dw_pcie_host_init) from [] (qcom_pcie_probe+0x20c/0x2e4)
pcie_phy_clk is generated for PCIe controller itself and the
GCC controls its branch operation. This error is coming since
the assert operations turn off the parent clock before branch
clock. Now this patch moves clk_disable_unprepare before assert
operations.
Similarly, during probe function, the clock branch operation
should be done after dessert operation. Currently, it does not
generate any error since bootloader enables the pcie_phy_clk
but the same error is coming during probe, if bootloader
disables pcie_phy_clk.
Change-Id: Ib29c154d10eb64363d9cc982ce5fd8107af5627d
Signed-off-by: Abhishek Sahu <absahu@codeaurora.org>
---
drivers/pci/host/pcie-qcom.c | 16 +++++++---------
1 file changed, 7 insertions(+), 9 deletions(-)
--- a/drivers/pci/controller/dwc/pcie-qcom.c
+++ b/drivers/pci/controller/dwc/pcie-qcom.c
@@ -393,6 +393,7 @@ static void qcom_pcie_deinit_2_1_0(struc
{
struct qcom_pcie_resources_2_1_0 *res = &pcie->res.v2_1_0;
+ clk_disable_unprepare(res->phy_clk);
reset_control_assert(res->pci_reset);
reset_control_assert(res->axi_reset);
reset_control_assert(res->ahb_reset);
@@ -401,7 +402,6 @@ static void qcom_pcie_deinit_2_1_0(struc
reset_control_assert(res->ext_reset);
clk_disable_unprepare(res->iface_clk);
clk_disable_unprepare(res->core_clk);
- clk_disable_unprepare(res->phy_clk);
clk_disable_unprepare(res->aux_clk);
clk_disable_unprepare(res->ref_clk);
regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies);
@@ -444,12 +444,6 @@ static int qcom_pcie_init_2_1_0(struct q
goto err_clk_core;
}
- ret = clk_prepare_enable(res->phy_clk);
- if (ret) {
- dev_err(dev, "cannot prepare/enable phy clock\n");
- goto err_clk_phy;
- }
-
ret = clk_prepare_enable(res->aux_clk);
if (ret) {
dev_err(dev, "cannot prepare/enable aux clock\n");
@@ -513,6 +507,12 @@ static int qcom_pcie_init_2_1_0(struct q
return ret;
}
+ ret = clk_prepare_enable(res->phy_clk);
+ if (ret) {
+ dev_err(dev, "cannot prepare/enable phy clock\n");
+ goto err_deassert_ahb;
+ }
+
/* wait for clock acquisition */
usleep_range(1000, 1500);
if (pcie->force_gen1) {
@@ -538,8 +538,6 @@ err_deassert_ahb:
err_clk_ref:
clk_disable_unprepare(res->aux_clk);
err_clk_aux:
- clk_disable_unprepare(res->phy_clk);
-err_clk_phy:
clk_disable_unprepare(res->core_clk);
err_clk_core:
clk_disable_unprepare(res->iface_clk);

25
target/linux/ipq806x/patches-5.4/0071-9-pcie-qcom-change-duplicate-pci-reset-to-phy-reset.patch
View File

@ -1,25 +0,0 @@
From 1a9c48123bd09f75562b6a2ee0f0a7b2d533cd45 Mon Sep 17 00:00:00 2001
From: Abhishek Sahu <absahu@codeaurora.org>
Date: Thu, 22 Dec 2016 11:50:49 +0530
Subject: pcie: qcom: change duplicate pci reset to phy reset
The deinit issues reset_control_assert for pci twice and
does not contain phy reset.
Change-Id: Iba849963c7e5f9a2a1063f0e2e89635df70b8a99
Signed-off-by: Abhishek Sahu <absahu@codeaurora.org>
---
drivers/pci/host/pcie-qcom.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/pci/controller/dwc/pcie-qcom.c
+++ b/drivers/pci/controller/dwc/pcie-qcom.c
@@ -394,7 +394,7 @@ static void qcom_pcie_deinit_2_1_0(struc
struct qcom_pcie_resources_2_1_0 *res = &pcie->res.v2_1_0;
clk_disable_unprepare(res->phy_clk);
- reset_control_assert(res->pci_reset);
+ reset_control_assert(res->phy_reset);
reset_control_assert(res->axi_reset);
reset_control_assert(res->ahb_reset);
reset_control_assert(res->por_reset);

14
target/linux/ipq806x/patches-5.4/085-ipq8064-v1.0-dtsi-additions.patch
View File

@ -4,7 +4,7 @@ for the (local) additional contents of qcom-ipq8064.dtsi
--- a/arch/arm/boot/dts/qcom-ipq8064-v1.0.dtsi
+++ b/arch/arm/boot/dts/qcom-ipq8064-v1.0.dtsi
@@ -56,3 +56,19 @@
@@ -56,3 +56,7 @@
};
};
};
@ -12,15 +12,3 @@ for the (local) additional contents of qcom-ipq8064.dtsi
+&CPU_SPC {
+ status = "okay";
+};
+
+&pcie0 {
+ phy-tx0-term-offset = <7>;
+};
+
+&pcie1 {
+ phy-tx0-term-offset = <7>;
+};
+
+&pcie2 {
+ phy-tx0-term-offset = <7>;
+};

24
target/linux/ipq806x/patches-5.4/0071-1-PCI-qcom-Fixed-IPQ806x-specific-clocks.patch → target/linux/ipq806x/patches-5.4/093-1-v5.8-ipq806x-PCI-qcom-Add-missing-ipq806x-clocks-in-PCIe-driver.patch
View File

@ -1,11 +1,21 @@
From 86655aa14304ca88a8ce8847276147dbc1a83238 Mon Sep 17 00:00:00 2001
From: Sham Muthayyan <smuthayy@codeaurora.org>
Date: Tue, 19 Jul 2016 18:44:49 +0530
Subject: PCI: qcom: Fixed IPQ806x specific clocks
From 8b6f0330b5f9a7543356bfa9e76d580f03aa2c1e Mon Sep 17 00:00:00 2001
From: Ansuel Smith <ansuelsmth@gmail.com>
Date: Mon, 15 Jun 2020 23:05:57 +0200
Subject: PCI: qcom: Add missing ipq806x clocks in PCIe driver
Change-Id: I488e1bc707d6a22b37a338f41935e3922009ba5e
Aux and Ref clk are missing in PCIe qcom driver. Add support for this
optional clks for ipq8064/apq8064 SoC.
Link: https://lore.kernel.org/r/20200615210608.21469-2-ansuelsmth@gmail.com
Fixes: 82a823833f4e ("PCI: qcom: Add Qualcomm PCIe controller driver")
Signed-off-by: Sham Muthayyan <smuthayy@codeaurora.org>
Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Acked-by: Stanimir Varbanov <svarbanov@mm-sol.com>
---
drivers/pci/controller/dwc/pcie-qcom.c | 38 +++++++++++++++++++++++++++++-----
1 file changed, 33 insertions(+), 5 deletions(-)
--- a/drivers/pci/controller/dwc/pcie-qcom.c
+++ b/drivers/pci/controller/dwc/pcie-qcom.c
@ -22,11 +32,11 @@ Signed-off-by: Sham Muthayyan <smuthayy@codeaurora.org>
if (IS_ERR(res->phy_clk))
return PTR_ERR(res->phy_clk);
+ res->aux_clk = devm_clk_get(dev, "aux");
+ res->aux_clk = devm_clk_get_optional(dev, "aux");
+ if (IS_ERR(res->aux_clk))
+ return PTR_ERR(res->aux_clk);
+
+ res->ref_clk = devm_clk_get(dev, "ref");
+ res->ref_clk = devm_clk_get_optional(dev, "ref");
+ if (IS_ERR(res->ref_clk))
+ return PTR_ERR(res->ref_clk);
+

72
target/linux/ipq806x/patches-5.4/093-2-v5.8-ipq806x-PCI-qcom-Change-duplicate-PCI-reset-to-phy-reset.patch Normal file
View File

@ -0,0 +1,72 @@
From dd58318c019f10bc94db36df66af6c55d4c0cbba Mon Sep 17 00:00:00 2001
From: Abhishek Sahu <absahu@codeaurora.org>
Date: Mon, 15 Jun 2020 23:05:59 +0200
Subject: PCI: qcom: Change duplicate PCI reset to phy reset
The deinit issues reset_control_assert for PCI twice and does not contain
phy reset.
Link: https://lore.kernel.org/r/20200615210608.21469-4-ansuelsmth@gmail.com
Signed-off-by: Abhishek Sahu <absahu@codeaurora.org>
Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Acked-by: Stanimir Varbanov <svarbanov@mm-sol.com>
---
drivers/pci/controller/dwc/pcie-qcom.c | 18 ++++++++----------
1 file changed, 8 insertions(+), 10 deletions(-)
--- a/drivers/pci/controller/dwc/pcie-qcom.c
+++ b/drivers/pci/controller/dwc/pcie-qcom.c
@@ -269,14 +269,14 @@ static void qcom_pcie_deinit_2_1_0(struc
{
struct qcom_pcie_resources_2_1_0 *res = &pcie->res.v2_1_0;
+ clk_disable_unprepare(res->phy_clk);
reset_control_assert(res->pci_reset);
reset_control_assert(res->axi_reset);
reset_control_assert(res->ahb_reset);
reset_control_assert(res->por_reset);
- reset_control_assert(res->pci_reset);
+ reset_control_assert(res->phy_reset);
clk_disable_unprepare(res->iface_clk);
clk_disable_unprepare(res->core_clk);
- clk_disable_unprepare(res->phy_clk);
clk_disable_unprepare(res->aux_clk);
clk_disable_unprepare(res->ref_clk);
regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies);
@@ -314,12 +314,6 @@ static int qcom_pcie_init_2_1_0(struct q
goto err_clk_core;
}
- ret = clk_prepare_enable(res->phy_clk);
- if (ret) {
- dev_err(dev, "cannot prepare/enable phy clock\n");
- goto err_clk_phy;
- }
-
ret = clk_prepare_enable(res->aux_clk);
if (ret) {
dev_err(dev, "cannot prepare/enable aux clock\n");
@@ -372,6 +366,12 @@ static int qcom_pcie_init_2_1_0(struct q
return ret;
}
+ ret = clk_prepare_enable(res->phy_clk);
+ if (ret) {
+ dev_err(dev, "cannot prepare/enable phy clock\n");
+ goto err_deassert_ahb;
+ }
+
/* wait for clock acquisition */
usleep_range(1000, 1500);
@@ -389,8 +389,6 @@ err_deassert_ahb:
err_clk_ref:
clk_disable_unprepare(res->aux_clk);
err_clk_aux:
- clk_disable_unprepare(res->phy_clk);
-err_clk_phy:
clk_disable_unprepare(res->core_clk);
err_clk_core:
clk_disable_unprepare(res->iface_clk);

62
target/linux/ipq806x/patches-5.4/093-3-v5.8-ipq806x-PCI-qcom-Add-missing-reset-for-ipq806x.patch Normal file
View File

@ -0,0 +1,62 @@
From ee367e2cdd2202b5714982739e684543cd2cee0e Mon Sep 17 00:00:00 2001
From: Ansuel Smith <ansuelsmth@gmail.com>
Date: Mon, 15 Jun 2020 23:06:00 +0200
Subject: PCI: qcom: Add missing reset for ipq806x
Add missing ext reset used by ipq8064 SoC in PCIe qcom driver.
Link: https://lore.kernel.org/r/20200615210608.21469-5-ansuelsmth@gmail.com
Fixes: 82a823833f4e ("PCI: qcom: Add Qualcomm PCIe controller driver")
Signed-off-by: Sham Muthayyan <smuthayy@codeaurora.org>
Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: Stanimir Varbanov <svarbanov@mm-sol.com>
Cc: stable@vger.kernel.org # v4.5+
---
drivers/pci/controller/dwc/pcie-qcom.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
--- a/drivers/pci/controller/dwc/pcie-qcom.c
+++ b/drivers/pci/controller/dwc/pcie-qcom.c
@@ -92,6 +92,7 @@ struct qcom_pcie_resources_2_1_0 {
struct reset_control *ahb_reset;
struct reset_control *por_reset;
struct reset_control *phy_reset;
+ struct reset_control *ext_reset;
struct regulator_bulk_data supplies[QCOM_PCIE_2_1_0_MAX_SUPPLY];
};
@@ -261,6 +262,10 @@ static int qcom_pcie_get_resources_2_1_0
if (IS_ERR(res->por_reset))
return PTR_ERR(res->por_reset);
+ res->ext_reset = devm_reset_control_get_optional_exclusive(dev, "ext");
+ if (IS_ERR(res->ext_reset))
+ return PTR_ERR(res->ext_reset);
+
res->phy_reset = devm_reset_control_get_exclusive(dev, "phy");
return PTR_ERR_OR_ZERO(res->phy_reset);
}
@@ -274,6 +279,7 @@ static void qcom_pcie_deinit_2_1_0(struc
reset_control_assert(res->axi_reset);
reset_control_assert(res->ahb_reset);
reset_control_assert(res->por_reset);
+ reset_control_assert(res->ext_reset);
reset_control_assert(res->phy_reset);
clk_disable_unprepare(res->iface_clk);
clk_disable_unprepare(res->core_clk);
@@ -332,6 +338,12 @@ static int qcom_pcie_init_2_1_0(struct q
goto err_deassert_ahb;
}
+ ret = reset_control_deassert(res->ext_reset);
+ if (ret) {
+ dev_err(dev, "cannot deassert ext reset\n");
+ goto err_deassert_ahb;
+ }
+
/* enable PCIe clocks and resets */
val = readl(pcie->parf + PCIE20_PARF_PHY_CTRL);
val &= ~BIT(0);

226
target/linux/ipq806x/patches-5.4/093-4-v5.8-ipq806x-PCI-qcom-Use-bulk-clk-api-and-assert-on-error.patch Normal file
View File

@ -0,0 +1,226 @@
From 6a114526af4689938863bf34976c83bfd279f517 Mon Sep 17 00:00:00 2001
From: Ansuel Smith <ansuelsmth@gmail.com>
Date: Mon, 15 Jun 2020 23:06:02 +0200
Subject: PCI: qcom: Use bulk clk api and assert on error
Rework 2.1.0 revision to use bulk clk api and fix missing assert on
reset_control_deassert error.
Link: https://lore.kernel.org/r/20200615210608.21469-7-ansuelsmth@gmail.com
Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Acked-by: Stanimir Varbanov <svarbanov@mm-sol.com>
---
drivers/pci/controller/dwc/pcie-qcom.c | 131 ++++++++++++---------------------
1 file changed, 46 insertions(+), 85 deletions(-)
--- a/drivers/pci/controller/dwc/pcie-qcom.c
+++ b/drivers/pci/controller/dwc/pcie-qcom.c
@@ -81,12 +81,9 @@
#define SLV_ADDR_SPACE_SZ 0x10000000
#define QCOM_PCIE_2_1_0_MAX_SUPPLY 3
+#define QCOM_PCIE_2_1_0_MAX_CLOCKS 5
struct qcom_pcie_resources_2_1_0 {
- struct clk *iface_clk;
- struct clk *core_clk;
- struct clk *phy_clk;
- struct clk *aux_clk;
- struct clk *ref_clk;
+ struct clk_bulk_data clks[QCOM_PCIE_2_1_0_MAX_CLOCKS];
struct reset_control *pci_reset;
struct reset_control *axi_reset;
struct reset_control *ahb_reset;
@@ -226,25 +223,21 @@ static int qcom_pcie_get_resources_2_1_0
if (ret)
return ret;
- res->iface_clk = devm_clk_get(dev, "iface");
- if (IS_ERR(res->iface_clk))
- return PTR_ERR(res->iface_clk);
-
- res->core_clk = devm_clk_get(dev, "core");
- if (IS_ERR(res->core_clk))
- return PTR_ERR(res->core_clk);
-
- res->phy_clk = devm_clk_get(dev, "phy");
- if (IS_ERR(res->phy_clk))
- return PTR_ERR(res->phy_clk);
-
- res->aux_clk = devm_clk_get_optional(dev, "aux");
- if (IS_ERR(res->aux_clk))
- return PTR_ERR(res->aux_clk);
-
- res->ref_clk = devm_clk_get_optional(dev, "ref");
- if (IS_ERR(res->ref_clk))
- return PTR_ERR(res->ref_clk);
+ res->clks[0].id = "iface";
+ res->clks[1].id = "core";
+ res->clks[2].id = "phy";
+ res->clks[3].id = "aux";
+ res->clks[4].id = "ref";
+
+ /* iface, core, phy are required */
+ ret = devm_clk_bulk_get(dev, 3, res->clks);
+ if (ret < 0)
+ return ret;
+
+ /* aux, ref are optional */
+ ret = devm_clk_bulk_get_optional(dev, 2, res->clks + 3);
+ if (ret < 0)
+ return ret;
res->pci_reset = devm_reset_control_get_exclusive(dev, "pci");
if (IS_ERR(res->pci_reset))
@@ -274,17 +267,13 @@ static void qcom_pcie_deinit_2_1_0(struc
{
struct qcom_pcie_resources_2_1_0 *res = &pcie->res.v2_1_0;
- clk_disable_unprepare(res->phy_clk);
+ clk_bulk_disable_unprepare(ARRAY_SIZE(res->clks), res->clks);
reset_control_assert(res->pci_reset);
reset_control_assert(res->axi_reset);
reset_control_assert(res->ahb_reset);
reset_control_assert(res->por_reset);
reset_control_assert(res->ext_reset);
reset_control_assert(res->phy_reset);
- clk_disable_unprepare(res->iface_clk);
- clk_disable_unprepare(res->core_clk);
- clk_disable_unprepare(res->aux_clk);
- clk_disable_unprepare(res->ref_clk);
regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies);
}
@@ -302,36 +291,6 @@ static int qcom_pcie_init_2_1_0(struct q
return ret;
}
- ret = reset_control_assert(res->ahb_reset);
- if (ret) {
- dev_err(dev, "cannot assert ahb reset\n");
- goto err_assert_ahb;
- }
-
- ret = clk_prepare_enable(res->iface_clk);
- if (ret) {
- dev_err(dev, "cannot prepare/enable iface clock\n");
- goto err_assert_ahb;
- }
-
- ret = clk_prepare_enable(res->core_clk);
- if (ret) {
- dev_err(dev, "cannot prepare/enable core clock\n");
- goto err_clk_core;
- }
-
- ret = clk_prepare_enable(res->aux_clk);
- if (ret) {
- dev_err(dev, "cannot prepare/enable aux clock\n");
- goto err_clk_aux;
- }
-
- ret = clk_prepare_enable(res->ref_clk);
- if (ret) {
- dev_err(dev, "cannot prepare/enable ref clock\n");
- goto err_clk_ref;
- }
-
ret = reset_control_deassert(res->ahb_reset);
if (ret) {
dev_err(dev, "cannot deassert ahb reset\n");
@@ -341,48 +300,46 @@ static int qcom_pcie_init_2_1_0(struct q
ret = reset_control_deassert(res->ext_reset);
if (ret) {
dev_err(dev, "cannot deassert ext reset\n");
- goto err_deassert_ahb;
+ goto err_deassert_ext;
}
- /* 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);
-
ret = reset_control_deassert(res->phy_reset);
if (ret) {
dev_err(dev, "cannot deassert phy reset\n");
- return ret;
+ goto err_deassert_phy;
}
ret = reset_control_deassert(res->pci_reset);
if (ret) {
dev_err(dev, "cannot deassert pci reset\n");
- return ret;
+ goto err_deassert_pci;
}
ret = reset_control_deassert(res->por_reset);
if (ret) {
dev_err(dev, "cannot deassert por reset\n");
- return ret;
+ goto err_deassert_por;
}
ret = reset_control_deassert(res->axi_reset);
if (ret) {
dev_err(dev, "cannot deassert axi reset\n");
- return ret;
+ goto err_deassert_axi;
}
- ret = clk_prepare_enable(res->phy_clk);
- if (ret) {
- dev_err(dev, "cannot prepare/enable phy clock\n");
- goto err_deassert_ahb;
- }
+ ret = clk_bulk_prepare_enable(ARRAY_SIZE(res->clks), res->clks);
+ if (ret)
+ goto err_clks;
+
+ /* 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);
/* wait for clock acquisition */
usleep_range(1000, 1500);
@@ -396,15 +353,19 @@ static int qcom_pcie_init_2_1_0(struct q
return 0;
+err_clks:
+ reset_control_assert(res->axi_reset);
+err_deassert_axi:
+ reset_control_assert(res->por_reset);
+err_deassert_por:
+ reset_control_assert(res->pci_reset);
+err_deassert_pci:
+ reset_control_assert(res->phy_reset);
+err_deassert_phy:
+ reset_control_assert(res->ext_reset);
+err_deassert_ext:
+ reset_control_assert(res->ahb_reset);
err_deassert_ahb:
- clk_disable_unprepare(res->ref_clk);
-err_clk_ref:
- clk_disable_unprepare(res->aux_clk);
-err_clk_aux:
- clk_disable_unprepare(res->core_clk);
-err_clk_core:
- clk_disable_unprepare(res->iface_clk);
-err_assert_ahb:
regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies);
return ret;

67
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@ -0,0 +1,67 @@
From 5149901e9e6deca487c01cc434a3ac4125c7b00b Mon Sep 17 00:00:00 2001
From: Ansuel Smith <ansuelsmth@gmail.com>
Date: Mon, 15 Jun 2020 23:06:03 +0200
Subject: PCI: qcom: Define some PARF params needed for ipq8064 SoC
Set some specific value for Tx De-Emphasis, Tx Swing and Rx equalization
needed on some ipq8064 based device (Netgear R7800 for example). Without
this the system locks on kernel load.
Link: https://lore.kernel.org/r/20200615210608.21469-8-ansuelsmth@gmail.com
Fixes: 82a823833f4e ("PCI: qcom: Add Qualcomm PCIe controller driver")
Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Acked-by: Stanimir Varbanov <svarbanov@mm-sol.com>
Cc: stable@vger.kernel.org # v4.5+
---
drivers/pci/controller/dwc/pcie-qcom.c | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)
--- a/drivers/pci/controller/dwc/pcie-qcom.c
+++ b/drivers/pci/controller/dwc/pcie-qcom.c
@@ -76,6 +76,18 @@
#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
@@ -282,6 +294,7 @@ 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;
+ struct device_node *node = dev->of_node;
u32 val;
int ret;
@@ -336,6 +349,17 @@ static int qcom_pcie_init_2_1_0(struct q
val &= ~BIT(0);
writel(val, pcie->parf + PCIE20_PARF_PHY_CTRL);
+ if (of_device_is_compatible(node, "qcom,pcie-ipq8064")) {
+ writel(PCS_DEEMPH_TX_DEEMPH_GEN1(24) |
+ PCS_DEEMPH_TX_DEEMPH_GEN2_3_5DB(24) |
+ PCS_DEEMPH_TX_DEEMPH_GEN2_6DB(34),
+ pcie->parf + PCIE20_PARF_PCS_DEEMPH);
+ writel(PCS_SWING_TX_SWING_FULL(120) |
+ PCS_SWING_TX_SWING_LOW(120),
+ pcie->parf + PCIE20_PARF_PCS_SWING);
+ writel(PHY_RX0_EQ(4), pcie->parf + PCIE20_PARF_CONFIG_BITS);
+ }
+
/* enable external reference clock */
val = readl(pcie->parf + PCIE20_PARF_PHY_REFCLK);
val |= BIT(16);

55
target/linux/ipq806x/patches-5.4/093-6-v5.8-ipq806x-PCI-qcom-Add-support-for-tx-term-offset-for-rev-2_1_0.patch Normal file
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@ -0,0 +1,55 @@
From de3c4bf648975ea0b1d344d811e9b0748907b47c Mon Sep 17 00:00:00 2001
From: Ansuel Smith <ansuelsmth@gmail.com>
Date: Mon, 15 Jun 2020 23:06:04 +0200
Subject: PCI: qcom: Add support for tx term offset for rev 2.1.0
Add tx term offset support to pcie qcom driver need in some revision of
the ipq806x SoC. Ipq8064 needs tx term offset set to 7.
Link: https://lore.kernel.org/r/20200615210608.21469-9-ansuelsmth@gmail.com
Fixes: 82a823833f4e ("PCI: qcom: Add Qualcomm PCIe controller driver")
Signed-off-by: Sham Muthayyan <smuthayy@codeaurora.org>
Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Stanimir Varbanov <svarbanov@mm-sol.com>
Cc: stable@vger.kernel.org # v4.5+
---
drivers/pci/controller/dwc/pcie-qcom.c | 17 ++++++++++++++++-
1 file changed, 16 insertions(+), 1 deletion(-)
--- 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 GENMASK(20, 16)
+#define PHY_CTRL_PHY_TX0_TERM_OFFSET(x) ((x) << 16)
+
#define PCIE20_PARF_PHY_REFCLK 0x4C
+#define PHY_REFCLK_SSP_EN BIT(16)
+#define PHY_REFCLK_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
@@ -360,9 +366,18 @@ static int qcom_pcie_init_2_1_0(struct q
writel(PHY_RX0_EQ(4), pcie->parf + PCIE20_PARF_CONFIG_BITS);
}
+ if (of_device_is_compatible(node, "qcom,pcie-ipq8064")) {
+ /* set TX termination offset */
+ val = readl(pcie->parf + PCIE20_PARF_PHY_CTRL);
+ val &= ~PHY_CTRL_PHY_TX0_TERM_OFFSET_MASK;
+ val |= PHY_CTRL_PHY_TX0_TERM_OFFSET(7);
+ writel(val, pcie->parf + PCIE20_PARF_PHY_CTRL);
+ }
+
/* enable external reference clock */
val = readl(pcie->parf + PCIE20_PARF_PHY_REFCLK);
- val |= BIT(16);
+ val &= ~PHY_REFCLK_USE_PAD;
+ val |= PHY_REFCLK_SSP_EN;
writel(val, pcie->parf + PCIE20_PARF_PHY_REFCLK);
/* wait for clock acquisition */

36
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@ -0,0 +1,36 @@
From 8df093fe2ae1717389df0dcdc620c02cc35abb21 Mon Sep 17 00:00:00 2001
From: Ansuel Smith <ansuelsmth@gmail.com>
Date: Mon, 15 Jun 2020 23:06:05 +0200
Subject: PCI: qcom: Add ipq8064 rev2 variant
Ipq8064-v2 have tx term offset set to 0. Introduce this variant to permit
different offset based on the revision.
Link: https://lore.kernel.org/r/20200615210608.21469-10-ansuelsmth@gmail.com
Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Stanimir Varbanov <svarbanov@mm-sol.com>
---
drivers/pci/controller/dwc/pcie-qcom.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
--- a/drivers/pci/controller/dwc/pcie-qcom.c
+++ b/drivers/pci/controller/dwc/pcie-qcom.c
@@ -355,7 +355,8 @@ static int qcom_pcie_init_2_1_0(struct q
val &= ~BIT(0);
writel(val, pcie->parf + PCIE20_PARF_PHY_CTRL);
- if (of_device_is_compatible(node, "qcom,pcie-ipq8064")) {
+ if (of_device_is_compatible(node, "qcom,pcie-ipq8064") ||
+ of_device_is_compatible(node, "qcom,pcie-ipq8064-v2")) {
writel(PCS_DEEMPH_TX_DEEMPH_GEN1(24) |
PCS_DEEMPH_TX_DEEMPH_GEN2_3_5DB(24) |
PCS_DEEMPH_TX_DEEMPH_GEN2_6DB(34),
@@ -1315,6 +1316,7 @@ err_pm_runtime_put:
static const struct of_device_id qcom_pcie_match[] = {
{ .compatible = "qcom,pcie-apq8084", .data = &ops_1_0_0 },
{ .compatible = "qcom,pcie-ipq8064", .data = &ops_2_1_0 },
+ { .compatible = "qcom,pcie-ipq8064-v2", .data = &ops_2_1_0 },
{ .compatible = "qcom,pcie-apq8064", .data = &ops_2_1_0 },
{ .compatible = "qcom,pcie-msm8996", .data = &ops_2_3_2 },
{ .compatible = "qcom,pcie-ipq8074", .data = &ops_2_3_3 },

74
target/linux/ipq806x/patches-5.4/093-8-v5.8-ipq806x-PCI-qcom-Support-pci-speed-set-for-ipq806x.patch Normal file
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@ -0,0 +1,74 @@
From 51ed2c2b60265006bde7531d10993cf24def0aee Mon Sep 17 00:00:00 2001
From: Sham Muthayyan <smuthayy@codeaurora.org>
Date: Mon, 15 Jun 2020 23:06:07 +0200
Subject: PCI: qcom: Support pci speed set for ipq806x
Some SoC based on ipq8064/5 needs to be limited to pci GEN1 speed due to
some hardware limitations. Add support for speed setting defined by the
max-link-speed binding. If not defined the max speed is set to GEN2 by
default.
Link: https://lore.kernel.org/r/20200615210608.21469-12-ansuelsmth@gmail.com
Signed-off-by: Sham Muthayyan <smuthayy@codeaurora.org>
Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Acked-by: Stanimir Varbanov <svarbanov@mm-sol.com>
---
Backported with light changes:
* One include is missing in kernel 5.4
drivers/pci/controller/dwc/pcie-qcom.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
--- a/drivers/pci/controller/dwc/pcie-qcom.c
+++ b/drivers/pci/controller/dwc/pcie-qcom.c
@@ -27,6 +27,7 @@
#include <linux/slab.h>
#include <linux/types.h>
+#include "../../pci.h"
#include "pcie-designware.h"
#define PCIE20_PARF_SYS_CTRL 0x00
@@ -98,6 +99,8 @@
#define PCIE20_v3_PARF_SLV_ADDR_SPACE_SIZE 0x358
#define SLV_ADDR_SPACE_SZ 0x10000000
+#define PCIE20_LNK_CONTROL2_LINK_STATUS2 0xa0
+
#define QCOM_PCIE_2_1_0_MAX_SUPPLY 3
#define QCOM_PCIE_2_1_0_MAX_CLOCKS 5
struct qcom_pcie_resources_2_1_0 {
@@ -184,6 +187,7 @@ struct qcom_pcie {
struct phy *phy;
struct gpio_desc *reset;
const struct qcom_pcie_ops *ops;
+ int gen;
};
#define to_qcom_pcie(x) dev_get_drvdata((x)->dev)
@@ -384,6 +388,11 @@ static int qcom_pcie_init_2_1_0(struct q
/* wait for clock acquisition */
usleep_range(1000, 1500);
+ if (pcie->gen == 1) {
+ val = readl(pci->dbi_base + PCIE20_LNK_CONTROL2_LINK_STATUS2);
+ val |= PCI_EXP_LNKSTA_CLS_2_5GB;
+ writel(val, pci->dbi_base + PCIE20_LNK_CONTROL2_LINK_STATUS2);
+ }
/* Set the Max TLP size to 2K, instead of using default of 4K */
writel(CFG_REMOTE_RD_REQ_BRIDGE_SIZE_2K,
@@ -1248,6 +1257,10 @@ static int qcom_pcie_probe(struct platfo
goto err_pm_runtime_put;
}
+ pcie->gen = of_pci_get_max_link_speed(pdev->dev.of_node);
+ if (pcie->gen < 0)
+ pcie->gen = 2;
+
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "parf");
pcie->parf = devm_ioremap_resource(dev, res);
if (IS_ERR(pcie->parf)) {