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-rw-r--r--target/linux/oxnas/files/drivers/pci/host/pcie-oxnas.c81
-rw-r--r--target/linux/oxnas/files/drivers/phy/phy-oxnas-pcie.c150
2 files changed, 164 insertions, 67 deletions
diff --git a/target/linux/oxnas/files/drivers/pci/host/pcie-oxnas.c b/target/linux/oxnas/files/drivers/pci/host/pcie-oxnas.c
index 76e42d13ef..68898c3beb 100644
--- a/target/linux/oxnas/files/drivers/pci/host/pcie-oxnas.c
+++ b/target/linux/oxnas/files/drivers/pci/host/pcie-oxnas.c
@@ -25,6 +25,8 @@
#include <linux/gpio.h>
#include <linux/delay.h>
#include <linux/clk.h>
+#include <linux/phy.h>
+#include <linux/phy/phy.h>
#include <linux/regmap.h>
#include <linux/reset.h>
#include <linux/io.h>
@@ -75,23 +77,6 @@ enum {
PCIE_OBTRANS = BIT(12),
};
-enum {
- HCSL_BIAS_ON = BIT(0),
- HCSL_PCIE_EN = BIT(1),
- HCSL_PCIEA_EN = BIT(2),
- HCSL_PCIEB_EN = BIT(3),
-};
-
-enum {
- /* pcie phy reg offset */
- PHY_ADDR = 0,
- PHY_DATA = 4,
- /* phy data reg bits */
- READ_EN = BIT(16),
- WRITE_EN = BIT(17),
- CAP_DATA = BIT(18),
-};
-
/* core config registers */
enum {
PCI_CONFIG_VERSION_DEVICEID = 0,
@@ -127,9 +112,6 @@ enum {
PCIE_SLAVE_BE_SHIFT = 22,
};
-#define ADDR_VAL(val) ((val) & 0xFFFF)
-#define DATA_VAL(val) ((val) & 0xFFFF)
-
#define PCIE_SLAVE_BE(val) ((val) << PCIE_SLAVE_BE_SHIFT)
#define PCIE_SLAVE_BE_MASK PCIE_SLAVE_BE(0xF)
@@ -146,7 +128,7 @@ struct oxnas_pcie {
struct regmap *sys_ctrl;
unsigned int outbound_offset;
unsigned int pcie_ctrl_offset;
-
+ struct phy *phy;
int haslink;
struct platform_device *pdev;
struct resource io;
@@ -406,52 +388,11 @@ static void oxnas_pcie_enable(struct device *dev, struct oxnas_pcie *pcie)
pci_common_init_dev(dev, &hw);
}
-void oxnas_pcie_init_shared_hw(struct platform_device *pdev,
- void __iomem *phybase,
- struct regmap *sys_ctrl)
-{
- struct reset_control *rstc;
- int ret;
-
- /* generate clocks from HCSL buffers, shared parts */
- regmap_write(sys_ctrl, SYS_CTRL_HCSL_CTRL_REGOFFSET, HCSL_BIAS_ON|HCSL_PCIE_EN);
-
- /* Ensure PCIe PHY is properly reset */
- rstc = reset_control_get(&pdev->dev, "phy");
- if (IS_ERR(rstc)) {
- ret = PTR_ERR(rstc);
- } else {
- ret = reset_control_reset(rstc);
- reset_control_put(rstc);
- }
-
- if (ret) {
- dev_err(&pdev->dev, "phy reset failed %d\n", ret);
- return;
- }
-
- /* Enable PCIe Pre-Emphasis: What these value means? */
- writel(ADDR_VAL(0x0014), phybase + PHY_ADDR);
- writel(DATA_VAL(0xce10) | CAP_DATA, phybase + PHY_DATA);
- writel(DATA_VAL(0xce10) | WRITE_EN, phybase + PHY_DATA);
-
- writel(ADDR_VAL(0x2004), phybase + PHY_ADDR);
- writel(DATA_VAL(0x82c7) | CAP_DATA, phybase + PHY_DATA);
- writel(DATA_VAL(0x82c7) | WRITE_EN, phybase + PHY_DATA);
-}
-
-static int oxnas_pcie_shared_init(struct platform_device *pdev, struct regmap *sys_ctrl)
+static int oxnas_pcie_shared_init(struct platform_device *pdev, struct oxnas_pcie *pcie)
{
if (++pcie_shared.refcount == 1) {
- /* we are the first */
- struct device_node *np = pdev->dev.of_node;
- void __iomem *phy = of_iomap(np, 2);
- if (!phy) {
- --pcie_shared.refcount;
- return -ENOMEM;
- }
- oxnas_pcie_init_shared_hw(pdev, phy, sys_ctrl);
- iounmap(phy);
+ phy_init(pcie->phy);
+ phy_power_on(pcie->phy);
return 0;
} else {
return 0;
@@ -478,7 +419,6 @@ oxnas_pcie_map_registers(struct platform_device *pdev,
u32 outbound_ctrl_offset;
u32 pcie_ctrl_offset;
- /* 2 is reserved for shared phy */
ret = of_address_to_resource(np, 0, &regs);
if (ret)
return -EINVAL;
@@ -493,6 +433,12 @@ oxnas_pcie_map_registers(struct platform_device *pdev,
if (!pcie->inbound)
return -ENOMEM;
+ pcie->phy = devm_of_phy_get(&pdev->dev, np, NULL);
+ if (IS_ERR(pcie->phy)) {
+ if (PTR_ERR(pcie->phy) == -EPROBE_DEFER)
+ return PTR_ERR(pcie->phy);
+ pcie->phy = NULL;
+ }
if (of_property_read_u32(np, "plxtech,pcie-outbound-offset",
&outbound_ctrl_offset))
@@ -589,6 +535,7 @@ static void oxnas_pcie_init_hw(struct platform_device *pdev,
mdelay(100);
}
+ /* ToDo: use phy power-on port... */
regmap_update_bits(pcie->sys_ctrl, SYS_CTRL_HCSL_CTRL_REGOFFSET,
BIT(pcie->hcsl_en), BIT(pcie->hcsl_en));
@@ -664,7 +611,7 @@ static int oxnas_pcie_probe(struct platform_device *pdev)
goto err_free_gpio;
}
- ret = oxnas_pcie_shared_init(pdev, pcie->sys_ctrl);
+ ret = oxnas_pcie_shared_init(pdev, pcie);
if (ret)
goto err_free_gpio;
diff --git a/target/linux/oxnas/files/drivers/phy/phy-oxnas-pcie.c b/target/linux/oxnas/files/drivers/phy/phy-oxnas-pcie.c
new file mode 100644
index 0000000000..676a5f9332
--- /dev/null
+++ b/target/linux/oxnas/files/drivers/phy/phy-oxnas-pcie.c
@@ -0,0 +1,150 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2019 Daniel Golle <daniel@makrotopia.org>
+ *
+ */
+
+#include <dt-bindings/phy/phy.h>
+#include <linux/io.h>
+#include <linux/iopoll.h>
+#include <linux/module.h>
+#include <linux/of_address.h>
+#include <linux/of_device.h>
+#include <linux/mfd/syscon.h>
+#include <linux/phy/phy.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/reset.h>
+
+#define ADDR_VAL(val) ((val) & 0xFFFF)
+#define DATA_VAL(val) ((val) & 0xFFFF)
+
+#define SYS_CTRL_HCSL_CTRL_REGOFFSET 0x114
+
+enum {
+ HCSL_BIAS_ON = BIT(0),
+ HCSL_PCIE_EN = BIT(1),
+ HCSL_PCIEA_EN = BIT(2),
+ HCSL_PCIEB_EN = BIT(3),
+};
+
+enum {
+ /* pcie phy reg offset */
+ PHY_ADDR = 0,
+ PHY_DATA = 4,
+ /* phy data reg bits */
+ READ_EN = BIT(16),
+ WRITE_EN = BIT(17),
+ CAP_DATA = BIT(18),
+};
+
+struct oxnas_pcie_phy {
+ struct device *dev;
+ void __iomem *membase;
+ const struct phy_ops *ops;
+ struct regmap *sys_ctrl;
+};
+
+static int oxnas_pcie_phy_init(struct phy *phy)
+{
+ struct oxnas_pcie_phy *pciephy = phy_get_drvdata(phy);
+ struct reset_control *rstc;
+ int ret;
+
+ /* generate clocks from HCSL buffers, shared parts */
+ regmap_write(pciephy->sys_ctrl, SYS_CTRL_HCSL_CTRL_REGOFFSET, HCSL_BIAS_ON|HCSL_PCIE_EN);
+
+ /* Ensure PCIe PHY is properly reset */
+ rstc = reset_control_get(pciephy->dev, "phy");
+ if (IS_ERR(rstc)) {
+ ret = PTR_ERR(rstc);
+ } else {
+ ret = reset_control_reset(rstc);
+ reset_control_put(rstc);
+ }
+
+ if (ret) {
+ dev_err(pciephy->dev, "phy reset failed %d\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int oxnas_pcie_phy_power_on(struct phy *phy)
+{
+ struct oxnas_pcie_phy *pciephy = phy_get_drvdata(phy);
+
+ /* Enable PCIe Pre-Emphasis: What these value means? */
+ writel(ADDR_VAL(0x0014), pciephy->membase + PHY_ADDR);
+ writel(DATA_VAL(0xce10) | CAP_DATA, pciephy->membase + PHY_DATA);
+ writel(DATA_VAL(0xce10) | WRITE_EN, pciephy->membase + PHY_DATA);
+
+ writel(ADDR_VAL(0x2004), pciephy->membase + PHY_ADDR);
+ writel(DATA_VAL(0x82c7) | CAP_DATA, pciephy->membase + PHY_DATA);
+ writel(DATA_VAL(0x82c7) | WRITE_EN, pciephy->membase + PHY_DATA);
+
+ return 0;
+}
+
+static const struct phy_ops ops = {
+ .init = oxnas_pcie_phy_init,
+ .power_on = oxnas_pcie_phy_power_on,
+ .owner = THIS_MODULE,
+};
+
+static int oxnas_pcie_phy_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct device_node *np = pdev->dev.of_node;
+ struct phy *generic_phy;
+ struct phy_provider *phy_provider;
+ struct oxnas_pcie_phy *pciephy;
+ struct regmap *sys_ctrl;
+ void __iomem *membase;
+
+ membase = of_iomap(np, 0);
+ if (IS_ERR(membase))
+ return PTR_ERR(membase);
+
+ sys_ctrl = syscon_regmap_lookup_by_compatible("oxsemi,ox820-sys-ctrl");
+ if (IS_ERR(sys_ctrl)) {
+ dev_err(dev, "Cannot find OX820 SYSCRTL\n");
+ return PTR_ERR(sys_ctrl);
+ }
+
+ pciephy = devm_kzalloc(dev, sizeof(*pciephy), GFP_KERNEL);
+ if (!pciephy)
+ return -ENOMEM;
+
+ pciephy->sys_ctrl = sys_ctrl;
+ pciephy->membase = membase;
+ pciephy->dev = dev;
+ pciephy->ops = &ops;
+
+ generic_phy = devm_phy_create(dev, dev->of_node, pciephy->ops);
+ if (IS_ERR(generic_phy)) {
+ dev_err(dev, "failed to create PHY\n");
+ return PTR_ERR(generic_phy);
+ }
+
+ phy_set_drvdata(generic_phy, pciephy);
+ phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
+
+ return PTR_ERR_OR_ZERO(phy_provider);
+}
+
+static const struct of_device_id oxnas_pcie_phy_id_table[] = {
+ { .compatible = "oxsemi,ox820-pcie-phy" },
+ { },
+};
+
+static struct platform_driver oxnas_pcie_phy_driver = {
+ .probe = oxnas_pcie_phy_probe,
+ .driver = {
+ .name = "ox820-pcie-phy",
+ .of_match_table = oxnas_pcie_phy_id_table,
+ },
+};
+
+builtin_platform_driver(oxnas_pcie_phy_driver);