Home Home > GIT Browse
summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorMian Yousaf Kaukab <yousaf.kaukab@suse.com>2017-11-15 15:39:19 +0100
committerMian Yousaf Kaukab <yousaf.kaukab@suse.com>2017-11-15 15:39:57 +0100
commitc8d683809c29d5557e7ca44f982e83423f90d720 (patch)
tree74bd4b4ae464cd8e317142c1f7be16052738e088
parent372e08455ba69d0d52eb7bde12b44dfb9f33465d (diff)
PCI: rockchip: Add per-lane PHY support (fate#323912).
-rw-r--r--drivers/pci/host/pcie-rockchip.c78
1 files changed, 58 insertions, 20 deletions
diff --git a/drivers/pci/host/pcie-rockchip.c b/drivers/pci/host/pcie-rockchip.c
index d274ed9ddfb0..4a0dfff94fa6 100644
--- a/drivers/pci/host/pcie-rockchip.c
+++ b/drivers/pci/host/pcie-rockchip.c
@@ -47,6 +47,7 @@
#define HIWORD_UPDATE_BIT(val) HIWORD_UPDATE(val, val)
#define ENCODE_LANES(x) ((((x) >> 1) & 3) << 4)
+#define MAX_LANE_NUM 4
#define PCIE_CLIENT_BASE 0x0
#define PCIE_CLIENT_CONFIG (PCIE_CLIENT_BASE + 0x00)
@@ -204,7 +205,8 @@
struct rockchip_pcie {
void __iomem *reg_base; /* DT axi-base */
void __iomem *apb_base; /* DT apb-base */
- struct phy *phy;
+ bool legacy_phy;
+ struct phy *phys[MAX_LANE_NUM];
struct reset_control *core_rst;
struct reset_control *mgmt_rst;
struct reset_control *mgmt_sticky_rst;
@@ -474,7 +476,7 @@ static void rockchip_pcie_set_power_limit(struct rockchip_pcie *rockchip)
static int rockchip_pcie_init_port(struct rockchip_pcie *rockchip)
{
struct device *dev = rockchip->dev;
- int err;
+ int err, i;
u32 status;
gpiod_set_value(rockchip->ep_gpio, 0);
@@ -497,10 +499,12 @@ static int rockchip_pcie_init_port(struct rockchip_pcie *rockchip)
return err;
}
- err = phy_init(rockchip->phy);
- if (err < 0) {
- dev_err(dev, "fail to init phy, err %d\n", err);
- return err;
+ for (i = 0; i < MAX_LANE_NUM; i++) {
+ err = phy_init(rockchip->phys[i]);
+ if (err) {
+ dev_err(dev, "init phy%d err %d\n", i, err);
+ return err;
+ }
}
err = reset_control_assert(rockchip->core_rst);
@@ -562,10 +566,12 @@ static int rockchip_pcie_init_port(struct rockchip_pcie *rockchip)
PCIE_CLIENT_MODE_RC,
PCIE_CLIENT_CONFIG);
- err = phy_power_on(rockchip->phy);
- if (err) {
- dev_err(dev, "fail to power on phy, err %d\n", err);
- return err;
+ for (i = 0; i < MAX_LANE_NUM; i++) {
+ err = phy_power_on(rockchip->phys[i]);
+ if (err) {
+ dev_err(dev, "power on phy%d err %d\n", i, err);
+ return err;
+ }
}
/*
@@ -821,12 +827,39 @@ static void rockchip_pcie_legacy_int_handler(struct irq_desc *desc)
static int rockchip_pcie_get_phys(struct rockchip_pcie *rockchip)
{
struct device *dev = rockchip->dev;
+ struct phy *phy;
+ char *name;
+ u32 i;
+
+ phy = devm_phy_get(dev, "pcie-phy");
+ if (!IS_ERR(phy)) {
+ rockchip->legacy_phy = true;
+ rockchip->phys[0] = phy;
+ dev_warn(dev, "legacy phy model is deprecated!\n");
+ return 0;
+ }
+
+ if (PTR_ERR(phy) == -EPROBE_DEFER)
+ return PTR_ERR(phy);
+
+ dev_dbg(dev, "missing legacy phy; search for per-lane PHY\n");
+
+ for (i = 0; i < MAX_LANE_NUM; i++) {
+ name = kasprintf(GFP_KERNEL, "pcie-phy-%u", i);
+ if (!name)
+ return -ENOMEM;
- rockchip->phy = devm_phy_get(dev, "pcie-phy");
- if (IS_ERR(rockchip->phy)) {
- if (PTR_ERR(rockchip->phy) != -EPROBE_DEFER)
- dev_err(dev, "missing phy\n");
- return PTR_ERR(rockchip->phy);
+ phy = devm_of_phy_get(dev, dev->of_node, name);
+ kfree(name);
+
+ if (IS_ERR(phy)) {
+ if (PTR_ERR(phy) != -EPROBE_DEFER)
+ dev_err(dev, "missing phy for lane %d: %ld\n",
+ i, PTR_ERR(phy));
+ return PTR_ERR(phy);
+ }
+
+ rockchip->phys[i] = phy;
}
return 0;
@@ -1245,7 +1278,7 @@ static int rockchip_pcie_wait_l2(struct rockchip_pcie *rockchip)
static int __maybe_unused rockchip_pcie_suspend_noirq(struct device *dev)
{
struct rockchip_pcie *rockchip = dev_get_drvdata(dev);
- int ret;
+ int ret, i;
/* disable core and cli int since we don't need to ack PME_ACK */
rockchip_pcie_write(rockchip, (PCIE_CLIENT_INT_CLI << 16) |
@@ -1258,8 +1291,10 @@ static int __maybe_unused rockchip_pcie_suspend_noirq(struct device *dev)
return ret;
}
- phy_power_off(rockchip->phy);
- phy_exit(rockchip->phy);
+ for (i = 0; i < MAX_LANE_NUM; i++) {
+ phy_power_off(rockchip->phys[i]);
+ phy_exit(rockchip->phys[i]);
+ }
clk_disable_unprepare(rockchip->clk_pcie_pm);
clk_disable_unprepare(rockchip->hclk_pcie);
@@ -1451,14 +1486,17 @@ static int rockchip_pcie_remove(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct rockchip_pcie *rockchip = dev_get_drvdata(dev);
+ int i;
pci_stop_root_bus(rockchip->root_bus);
pci_remove_root_bus(rockchip->root_bus);
pci_unmap_iospace(rockchip->io);
irq_domain_remove(rockchip->irq_domain);
- phy_power_off(rockchip->phy);
- phy_exit(rockchip->phy);
+ for (i = 0; i < MAX_LANE_NUM; i++) {
+ phy_power_off(rockchip->phys[i]);
+ phy_exit(rockchip->phys[i]);
+ }
clk_disable_unprepare(rockchip->clk_pcie_pm);
clk_disable_unprepare(rockchip->hclk_pcie);