ipq806x: fix wireless regression
[openwrt/openwrt.git] / target / linux / ipq806x / patches-4.9 / 0071-6-PCI-qcom-Force-GEN1-support.patch
1 From 4910cfd150342ec7b038892262923c725a9c4001 Mon Sep 17 00:00:00 2001
2 From: Sham Muthayyan <smuthayy@codeaurora.org>
3 Date: Wed, 7 Sep 2016 16:44:28 +0530
4 Subject: PCI: qcom: Force GEN1 support
5
6 Change-Id: Ica54ddb737d7b851469deab1745f54bf431bd3f0
7 Signed-off-by: Sham Muthayyan <smuthayy@codeaurora.org>
8 ---
9 drivers/pci/host/pcie-qcom.c | 13 +++++++++++++
10 1 file changed, 13 insertions(+)
11
12 --- a/drivers/pci/host/pcie-qcom.c
13 +++ b/drivers/pci/host/pcie-qcom.c
14 @@ -90,6 +90,8 @@
15 #define PCIE20_PARF_CONFIG_BITS 0x50
16 #define PHY_RX0_EQ(x) (x << 24)
17
18 +#define PCIE20_LNK_CONTROL2_LINK_STATUS2 0xA0
19 +
20 struct qcom_pcie_resources_v0 {
21 struct clk *iface_clk;
22 struct clk *core_clk;
23 @@ -138,6 +140,7 @@ struct qcom_pcie {
24 struct phy *phy;
25 struct gpio_desc *reset;
26 struct qcom_pcie_ops *ops;
27 + uint32_t force_gen1;
28 };
29
30 #define to_qcom_pcie(x) container_of(x, struct qcom_pcie, pp)
31 @@ -477,6 +480,11 @@ static int qcom_pcie_init_v0(struct qcom
32
33 /* wait for clock acquisition */
34 usleep_range(1000, 1500);
35 + if (pcie->force_gen1) {
36 + writel_relaxed((readl_relaxed(
37 + pcie->pp.dbi_base + PCIE20_LNK_CONTROL2_LINK_STATUS2) | 1),
38 + pcie->pp.dbi_base + PCIE20_LNK_CONTROL2_LINK_STATUS2);
39 + }
40
41 qcom_pcie_prog_viewport_cfg0(pcie, MSM_PCIE_DEV_CFG_ADDR);
42 qcom_pcie_prog_viewport_mem2_outbound(pcie);
43 @@ -666,6 +674,8 @@ static int qcom_pcie_probe(struct platfo
44 struct qcom_pcie *pcie;
45 struct pcie_port *pp;
46 int ret;
47 + uint32_t force_gen1 = 0;
48 + struct device_node *np = pdev->dev.of_node;
49
50 pcie = devm_kzalloc(dev, sizeof(*pcie), GFP_KERNEL);
51 if (!pcie)
52 @@ -678,6 +688,9 @@ static int qcom_pcie_probe(struct platfo
53 if (IS_ERR(pcie->reset))
54 return PTR_ERR(pcie->reset);
55
56 + of_property_read_u32(np, "force_gen1", &force_gen1);
57 + pcie->force_gen1 = force_gen1;
58 +
59 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "parf");
60 pcie->parf = devm_ioremap_resource(dev, res);
61 if (IS_ERR(pcie->parf))