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-rw-r--r--target/linux/generic/files/drivers/net/phy/rtl8366_smi.c157
-rw-r--r--target/linux/generic/files/drivers/net/phy/rtl8366_smi.h1
2 files changed, 141 insertions, 17 deletions
diff --git a/target/linux/generic/files/drivers/net/phy/rtl8366_smi.c b/target/linux/generic/files/drivers/net/phy/rtl8366_smi.c
index 00ad68e0bc..c0cb680e23 100644
--- a/target/linux/generic/files/drivers/net/phy/rtl8366_smi.c
+++ b/target/linux/generic/files/drivers/net/phy/rtl8366_smi.c
@@ -199,7 +199,7 @@ static int rtl8366_smi_read_byte1(struct rtl8366_smi *smi, u8 *data)
return 0;
}
-int rtl8366_smi_read_reg(struct rtl8366_smi *smi, u32 addr, u32 *data)
+static int __rtl8366_smi_read_reg(struct rtl8366_smi *smi, u32 addr, u32 *data)
{
unsigned long flags;
u8 lo = 0;
@@ -240,6 +240,101 @@ int rtl8366_smi_read_reg(struct rtl8366_smi *smi, u32 addr, u32 *data)
return ret;
}
+/* Read/write via mdiobus */
+#define MDC_MDIO_CTRL0_REG 31
+#define MDC_MDIO_START_REG 29
+#define MDC_MDIO_CTRL1_REG 21
+#define MDC_MDIO_ADDRESS_REG 23
+#define MDC_MDIO_DATA_WRITE_REG 24
+#define MDC_MDIO_DATA_READ_REG 25
+
+#define MDC_MDIO_START_OP 0xFFFF
+#define MDC_MDIO_ADDR_OP 0x000E
+#define MDC_MDIO_READ_OP 0x0001
+#define MDC_MDIO_WRITE_OP 0x0003
+#define MDC_REALTEK_PHY_ADDR 0x0
+
+int __rtl8366_mdio_read_reg(struct rtl8366_smi *smi, u32 addr, u32 *data)
+{
+ u32 phy_id = MDC_REALTEK_PHY_ADDR;
+ struct mii_bus *mbus = smi->ext_mbus;
+
+ BUG_ON(in_interrupt());
+
+ mutex_lock(&mbus->mdio_lock);
+ /* Write Start command to register 29 */
+ mbus->write(mbus, phy_id, MDC_MDIO_START_REG, MDC_MDIO_START_OP);
+
+ /* Write address control code to register 31 */
+ mbus->write(mbus, phy_id, MDC_MDIO_CTRL0_REG, MDC_MDIO_ADDR_OP);
+
+ /* Write Start command to register 29 */
+ mbus->write(mbus, phy_id, MDC_MDIO_START_REG, MDC_MDIO_START_OP);
+
+ /* Write address to register 23 */
+ mbus->write(mbus, phy_id, MDC_MDIO_ADDRESS_REG, addr);
+
+ /* Write Start command to register 29 */
+ mbus->write(mbus, phy_id, MDC_MDIO_START_REG, MDC_MDIO_START_OP);
+
+ /* Write read control code to register 21 */
+ mbus->write(mbus, phy_id, MDC_MDIO_CTRL1_REG, MDC_MDIO_READ_OP);
+
+ /* Write Start command to register 29 */
+ mbus->write(smi->ext_mbus, phy_id, MDC_MDIO_START_REG, MDC_MDIO_START_OP);
+
+ /* Read data from register 25 */
+ *data = mbus->read(mbus, phy_id, MDC_MDIO_DATA_READ_REG);
+
+ mutex_unlock(&mbus->mdio_lock);
+
+ return 0;
+}
+
+static int __rtl8366_mdio_write_reg(struct rtl8366_smi *smi, u32 addr, u32 data)
+{
+ u32 phy_id = MDC_REALTEK_PHY_ADDR;
+ struct mii_bus *mbus = smi->ext_mbus;
+
+ BUG_ON(in_interrupt());
+
+ mutex_lock(&mbus->mdio_lock);
+
+ /* Write Start command to register 29 */
+ mbus->write(mbus, phy_id, MDC_MDIO_START_REG, MDC_MDIO_START_OP);
+
+ /* Write address control code to register 31 */
+ mbus->write(mbus, phy_id, MDC_MDIO_CTRL0_REG, MDC_MDIO_ADDR_OP);
+
+ /* Write Start command to register 29 */
+ mbus->write(mbus, phy_id, MDC_MDIO_START_REG, MDC_MDIO_START_OP);
+
+ /* Write address to register 23 */
+ mbus->write(mbus, phy_id, MDC_MDIO_ADDRESS_REG, addr);
+
+ /* Write Start command to register 29 */
+ mbus->write(mbus, phy_id, MDC_MDIO_START_REG, MDC_MDIO_START_OP);
+
+ /* Write data to register 24 */
+ mbus->write(mbus, phy_id, MDC_MDIO_DATA_WRITE_REG, data);
+
+ /* Write Start command to register 29 */
+ mbus->write(mbus, phy_id, MDC_MDIO_START_REG, MDC_MDIO_START_OP);
+
+ /* Write data control code to register 21 */
+ mbus->write(mbus, phy_id, MDC_MDIO_CTRL1_REG, MDC_MDIO_WRITE_OP);
+
+ mutex_unlock(&mbus->mdio_lock);
+ return 0;
+}
+
+int rtl8366_smi_read_reg(struct rtl8366_smi *smi, u32 addr, u32 *data)
+{
+ if (smi->ext_mbus)
+ return __rtl8366_mdio_read_reg(smi, addr, data);
+ else
+ return __rtl8366_smi_read_reg(smi, addr, data);
+}
EXPORT_SYMBOL_GPL(rtl8366_smi_read_reg);
static int __rtl8366_smi_write_reg(struct rtl8366_smi *smi,
@@ -291,7 +386,10 @@ static int __rtl8366_smi_write_reg(struct rtl8366_smi *smi,
int rtl8366_smi_write_reg(struct rtl8366_smi *smi, u32 addr, u32 data)
{
- return __rtl8366_smi_write_reg(smi, addr, data, true);
+ if (smi->ext_mbus)
+ return __rtl8366_mdio_write_reg(smi, addr, data);
+ else
+ return __rtl8366_smi_write_reg(smi, addr, data, true);
}
EXPORT_SYMBOL_GPL(rtl8366_smi_write_reg);
@@ -1282,18 +1380,20 @@ static int __rtl8366_smi_init(struct rtl8366_smi *smi, const char *name)
{
int err;
- err = gpio_request(smi->gpio_sda, name);
- if (err) {
- printk(KERN_ERR "rtl8366_smi: gpio_request failed for %u, err=%d\n",
- smi->gpio_sda, err);
- goto err_out;
- }
+ if (!smi->ext_mbus) {
+ err = gpio_request(smi->gpio_sda, name);
+ if (err) {
+ printk(KERN_ERR "rtl8366_smi: gpio_request failed for %u, err=%d\n",
+ smi->gpio_sda, err);
+ goto err_out;
+ }
- err = gpio_request(smi->gpio_sck, name);
- if (err) {
- printk(KERN_ERR "rtl8366_smi: gpio_request failed for %u, err=%d\n",
- smi->gpio_sck, err);
- goto err_free_sda;
+ err = gpio_request(smi->gpio_sck, name);
+ if (err) {
+ printk(KERN_ERR "rtl8366_smi: gpio_request failed for %u, err=%d\n",
+ smi->gpio_sck, err);
+ goto err_free_sda;
+ }
}
spin_lock_init(&smi->lock);
@@ -1317,8 +1417,10 @@ static void __rtl8366_smi_cleanup(struct rtl8366_smi *smi)
if (smi->hw_reset)
smi->hw_reset(smi, true);
- gpio_free(smi->gpio_sck);
- gpio_free(smi->gpio_sda);
+ if (!smi->ext_mbus) {
+ gpio_free(smi->gpio_sck);
+ gpio_free(smi->gpio_sda);
+ }
}
enum rtl8366_type rtl8366_smi_detect(struct rtl8366_platform_data *pdata)
@@ -1371,8 +1473,11 @@ int rtl8366_smi_init(struct rtl8366_smi *smi)
if (err)
goto err_out;
- dev_info(smi->parent, "using GPIO pins %u (SDA) and %u (SCK)\n",
- smi->gpio_sda, smi->gpio_sck);
+ if (!smi->ext_mbus)
+ dev_info(smi->parent, "using GPIO pins %u (SDA) and %u (SCK)\n",
+ smi->gpio_sda, smi->gpio_sck);
+ else
+ dev_info(smi->parent, "using MDIO bus '%s'\n", smi->ext_mbus->name);
err = smi->ops->detect(smi);
if (err) {
@@ -1437,7 +1542,25 @@ int rtl8366_smi_probe_of(struct platform_device *pdev, struct rtl8366_smi *smi)
{
int sck = of_get_named_gpio(pdev->dev.of_node, "gpio-sck", 0);
int sda = of_get_named_gpio(pdev->dev.of_node, "gpio-sda", 0);
+ struct device_node *np = pdev->dev.of_node;
+ struct device_node *mdio_node;
+
+ mdio_node = of_parse_phandle(np, "mii-bus", 0);
+ if (!mdio_node) {
+ dev_err(&pdev->dev, "cannot find mdio node phandle");
+ goto try_gpio;
+ }
+
+ smi->ext_mbus = of_mdio_find_bus(mdio_node);
+ if (!smi->ext_mbus) {
+ dev_err(&pdev->dev,
+ "cannot find mdio bus from bus handle");
+ goto try_gpio;
+ }
+
+ return 0;
+try_gpio:
if (!gpio_is_valid(sck) || !gpio_is_valid(sda)) {
dev_err(&pdev->dev, "gpios missing in devictree\n");
return -EINVAL;
diff --git a/target/linux/generic/files/drivers/net/phy/rtl8366_smi.h b/target/linux/generic/files/drivers/net/phy/rtl8366_smi.h
index e5f34bf9cf..d1d988a372 100644
--- a/target/linux/generic/files/drivers/net/phy/rtl8366_smi.h
+++ b/target/linux/generic/files/drivers/net/phy/rtl8366_smi.h
@@ -63,6 +63,7 @@ struct rtl8366_smi {
u16 dbg_reg;
u8 dbg_vlan_4k_page;
#endif
+ struct mii_bus *ext_mbus;
};
struct rtl8366_vlan_mc {
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-03 17:07:23 +0000