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Diffstat (limited to 'target/linux/sunxi/patches-4.14/002-net-stmmac-dwmac-sun8i-Handle-integrated-external-MD.patch')
-rw-r--r--target/linux/sunxi/patches-4.14/002-net-stmmac-dwmac-sun8i-Handle-integrated-external-MD.patch506
1 files changed, 0 insertions, 506 deletions
diff --git a/target/linux/sunxi/patches-4.14/002-net-stmmac-dwmac-sun8i-Handle-integrated-external-MD.patch b/target/linux/sunxi/patches-4.14/002-net-stmmac-dwmac-sun8i-Handle-integrated-external-MD.patch
deleted file mode 100644
index 9f7f89c7e2..0000000000
--- a/target/linux/sunxi/patches-4.14/002-net-stmmac-dwmac-sun8i-Handle-integrated-external-MD.patch
+++ /dev/null
@@ -1,506 +0,0 @@
-From 634db83b82658f4641d8026e340c6027cf74a6bb Mon Sep 17 00:00:00 2001
-From: Corentin Labbe <clabbe.montjoie@gmail.com>
-Date: Tue, 24 Oct 2017 19:57:13 +0200
-Subject: [PATCH] net: stmmac: dwmac-sun8i: Handle integrated/external MDIOs
-
-The Allwinner H3 SoC have two distinct MDIO bus, only one could be
-active at the same time.
-The selection of the active MDIO bus are done via some bits in the EMAC
-register of the system controller.
-
-This patch implement this MDIO switch via a custom MDIO-mux.
-
-Signed-off-by: Corentin Labbe <clabbe.montjoie@gmail.com>
-Reviewed-by: Andrew Lunn <andrew@lunn.ch>
-Signed-off-by: David S. Miller <davem@davemloft.net>
----
- drivers/net/ethernet/stmicro/stmmac/Kconfig | 1 +
- drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c | 353 ++++++++++++++--------
- 2 files changed, 224 insertions(+), 130 deletions(-)
-
---- a/drivers/net/ethernet/stmicro/stmmac/Kconfig
-+++ b/drivers/net/ethernet/stmicro/stmmac/Kconfig
-@@ -159,6 +159,7 @@ config DWMAC_SUN8I
- tristate "Allwinner sun8i GMAC support"
- default ARCH_SUNXI
- depends on OF && (ARCH_SUNXI || COMPILE_TEST)
-+ select MDIO_BUS_MUX
- ---help---
- Support for Allwinner H3 A83T A64 EMAC ethernet controllers.
-
---- a/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c
-+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c
-@@ -17,6 +17,7 @@
- #include <linux/clk.h>
- #include <linux/io.h>
- #include <linux/iopoll.h>
-+#include <linux/mdio-mux.h>
- #include <linux/mfd/syscon.h>
- #include <linux/module.h>
- #include <linux/of_device.h>
-@@ -41,14 +42,14 @@
- * This value is used for disabling properly EMAC
- * and used as a good starting value in case of the
- * boot process(uboot) leave some stuff.
-- * @internal_phy: Does the MAC embed an internal PHY
-+ * @soc_has_internal_phy: Does the MAC embed an internal PHY
- * @support_mii: Does the MAC handle MII
- * @support_rmii: Does the MAC handle RMII
- * @support_rgmii: Does the MAC handle RGMII
- */
- struct emac_variant {
- u32 default_syscon_value;
-- int internal_phy;
-+ bool soc_has_internal_phy;
- bool support_mii;
- bool support_rmii;
- bool support_rgmii;
-@@ -61,7 +62,8 @@ struct emac_variant {
- * @rst_ephy: reference to the optional EPHY reset for the internal PHY
- * @variant: reference to the current board variant
- * @regmap: regmap for using the syscon
-- * @use_internal_phy: Does the current PHY choice imply using the internal PHY
-+ * @internal_phy_powered: Does the internal PHY is enabled
-+ * @mux_handle: Internal pointer used by mdio-mux lib
- */
- struct sunxi_priv_data {
- struct clk *tx_clk;
-@@ -70,12 +72,13 @@ struct sunxi_priv_data {
- struct reset_control *rst_ephy;
- const struct emac_variant *variant;
- struct regmap *regmap;
-- bool use_internal_phy;
-+ bool internal_phy_powered;
-+ void *mux_handle;
- };
-
- static const struct emac_variant emac_variant_h3 = {
- .default_syscon_value = 0x58000,
-- .internal_phy = PHY_INTERFACE_MODE_MII,
-+ .soc_has_internal_phy = true,
- .support_mii = true,
- .support_rmii = true,
- .support_rgmii = true
-@@ -83,20 +86,20 @@ static const struct emac_variant emac_va
-
- static const struct emac_variant emac_variant_v3s = {
- .default_syscon_value = 0x38000,
-- .internal_phy = PHY_INTERFACE_MODE_MII,
-+ .soc_has_internal_phy = true,
- .support_mii = true
- };
-
- static const struct emac_variant emac_variant_a83t = {
- .default_syscon_value = 0,
-- .internal_phy = 0,
-+ .soc_has_internal_phy = false,
- .support_mii = true,
- .support_rgmii = true
- };
-
- static const struct emac_variant emac_variant_a64 = {
- .default_syscon_value = 0,
-- .internal_phy = 0,
-+ .soc_has_internal_phy = false,
- .support_mii = true,
- .support_rmii = true,
- .support_rgmii = true
-@@ -195,6 +198,9 @@ static const struct emac_variant emac_va
- #define H3_EPHY_LED_POL BIT(17) /* 1: active low, 0: active high */
- #define H3_EPHY_SHUTDOWN BIT(16) /* 1: shutdown, 0: power up */
- #define H3_EPHY_SELECT BIT(15) /* 1: internal PHY, 0: external PHY */
-+#define H3_EPHY_MUX_MASK (H3_EPHY_SHUTDOWN | H3_EPHY_SELECT)
-+#define DWMAC_SUN8I_MDIO_MUX_INTERNAL_ID 1
-+#define DWMAC_SUN8I_MDIO_MUX_EXTERNAL_ID 2
-
- /* H3/A64 specific bits */
- #define SYSCON_RMII_EN BIT(13) /* 1: enable RMII (overrides EPIT) */
-@@ -635,6 +641,159 @@ static int sun8i_dwmac_reset(struct stmm
- return 0;
- }
-
-+/* Search in mdio-mux node for internal PHY node and get its clk/reset */
-+static int get_ephy_nodes(struct stmmac_priv *priv)
-+{
-+ struct sunxi_priv_data *gmac = priv->plat->bsp_priv;
-+ struct device_node *mdio_mux, *iphynode;
-+ struct device_node *mdio_internal;
-+ int ret;
-+
-+ mdio_mux = of_get_child_by_name(priv->device->of_node, "mdio-mux");
-+ if (!mdio_mux) {
-+ dev_err(priv->device, "Cannot get mdio-mux node\n");
-+ return -ENODEV;
-+ }
-+
-+ mdio_internal = of_find_compatible_node(mdio_mux, NULL,
-+ "allwinner,sun8i-h3-mdio-internal");
-+ if (!mdio_internal) {
-+ dev_err(priv->device, "Cannot get internal_mdio node\n");
-+ return -ENODEV;
-+ }
-+
-+ /* Seek for internal PHY */
-+ for_each_child_of_node(mdio_internal, iphynode) {
-+ gmac->ephy_clk = of_clk_get(iphynode, 0);
-+ if (IS_ERR(gmac->ephy_clk))
-+ continue;
-+ gmac->rst_ephy = of_reset_control_get_exclusive(iphynode, NULL);
-+ if (IS_ERR(gmac->rst_ephy)) {
-+ ret = PTR_ERR(gmac->rst_ephy);
-+ if (ret == -EPROBE_DEFER)
-+ return ret;
-+ continue;
-+ }
-+ dev_info(priv->device, "Found internal PHY node\n");
-+ return 0;
-+ }
-+ return -ENODEV;
-+}
-+
-+static int sun8i_dwmac_power_internal_phy(struct stmmac_priv *priv)
-+{
-+ struct sunxi_priv_data *gmac = priv->plat->bsp_priv;
-+ int ret;
-+
-+ if (gmac->internal_phy_powered) {
-+ dev_warn(priv->device, "Internal PHY already powered\n");
-+ return 0;
-+ }
-+
-+ dev_info(priv->device, "Powering internal PHY\n");
-+ ret = clk_prepare_enable(gmac->ephy_clk);
-+ if (ret) {
-+ dev_err(priv->device, "Cannot enable internal PHY\n");
-+ return ret;
-+ }
-+
-+ /* Make sure the EPHY is properly reseted, as U-Boot may leave
-+ * it at deasserted state, and thus it may fail to reset EMAC.
-+ */
-+ reset_control_assert(gmac->rst_ephy);
-+
-+ ret = reset_control_deassert(gmac->rst_ephy);
-+ if (ret) {
-+ dev_err(priv->device, "Cannot deassert internal phy\n");
-+ clk_disable_unprepare(gmac->ephy_clk);
-+ return ret;
-+ }
-+
-+ gmac->internal_phy_powered = true;
-+
-+ return 0;
-+}
-+
-+static int sun8i_dwmac_unpower_internal_phy(struct sunxi_priv_data *gmac)
-+{
-+ if (!gmac->internal_phy_powered)
-+ return 0;
-+
-+ clk_disable_unprepare(gmac->ephy_clk);
-+ reset_control_assert(gmac->rst_ephy);
-+ gmac->internal_phy_powered = false;
-+ return 0;
-+}
-+
-+/* MDIO multiplexing switch function
-+ * This function is called by the mdio-mux layer when it thinks the mdio bus
-+ * multiplexer needs to switch.
-+ * 'current_child' is the current value of the mux register
-+ * 'desired_child' is the value of the 'reg' property of the target child MDIO
-+ * node.
-+ * The first time this function is called, current_child == -1.
-+ * If current_child == desired_child, then the mux is already set to the
-+ * correct bus.
-+ */
-+static int mdio_mux_syscon_switch_fn(int current_child, int desired_child,
-+ void *data)
-+{
-+ struct stmmac_priv *priv = data;
-+ struct sunxi_priv_data *gmac = priv->plat->bsp_priv;
-+ u32 reg, val;
-+ int ret = 0;
-+ bool need_power_ephy = false;
-+
-+ if (current_child ^ desired_child) {
-+ regmap_read(gmac->regmap, SYSCON_EMAC_REG, &reg);
-+ switch (desired_child) {
-+ case DWMAC_SUN8I_MDIO_MUX_INTERNAL_ID:
-+ dev_info(priv->device, "Switch mux to internal PHY");
-+ val = (reg & ~H3_EPHY_MUX_MASK) | H3_EPHY_SELECT;
-+
-+ need_power_ephy = true;
-+ break;
-+ case DWMAC_SUN8I_MDIO_MUX_EXTERNAL_ID:
-+ dev_info(priv->device, "Switch mux to external PHY");
-+ val = (reg & ~H3_EPHY_MUX_MASK) | H3_EPHY_SHUTDOWN;
-+ need_power_ephy = false;
-+ break;
-+ default:
-+ dev_err(priv->device, "Invalid child ID %x\n",
-+ desired_child);
-+ return -EINVAL;
-+ }
-+ regmap_write(gmac->regmap, SYSCON_EMAC_REG, val);
-+ if (need_power_ephy) {
-+ ret = sun8i_dwmac_power_internal_phy(priv);
-+ if (ret)
-+ return ret;
-+ } else {
-+ sun8i_dwmac_unpower_internal_phy(gmac);
-+ }
-+ /* After changing syscon value, the MAC need reset or it will
-+ * use the last value (and so the last PHY set).
-+ */
-+ ret = sun8i_dwmac_reset(priv);
-+ }
-+ return ret;
-+}
-+
-+static int sun8i_dwmac_register_mdio_mux(struct stmmac_priv *priv)
-+{
-+ int ret;
-+ struct device_node *mdio_mux;
-+ struct sunxi_priv_data *gmac = priv->plat->bsp_priv;
-+
-+ mdio_mux = of_get_child_by_name(priv->device->of_node, "mdio-mux");
-+ if (!mdio_mux)
-+ return -ENODEV;
-+
-+ ret = mdio_mux_init(priv->device, mdio_mux, mdio_mux_syscon_switch_fn,
-+ &gmac->mux_handle, priv, priv->mii);
-+ return ret;
-+}
-+
- static int sun8i_dwmac_set_syscon(struct stmmac_priv *priv)
- {
- struct sunxi_priv_data *gmac = priv->plat->bsp_priv;
-@@ -649,35 +808,25 @@ static int sun8i_dwmac_set_syscon(struct
- "Current syscon value is not the default %x (expect %x)\n",
- val, reg);
-
-- if (gmac->variant->internal_phy) {
-- if (!gmac->use_internal_phy) {
-- /* switch to external PHY interface */
-- reg &= ~H3_EPHY_SELECT;
-- } else {
-- reg |= H3_EPHY_SELECT;
-- reg &= ~H3_EPHY_SHUTDOWN;
-- dev_dbg(priv->device, "Select internal_phy %x\n", reg);
--
-- if (of_property_read_bool(priv->plat->phy_node,
-- "allwinner,leds-active-low"))
-- reg |= H3_EPHY_LED_POL;
-- else
-- reg &= ~H3_EPHY_LED_POL;
--
-- /* Force EPHY xtal frequency to 24MHz. */
-- reg |= H3_EPHY_CLK_SEL;
--
-- ret = of_mdio_parse_addr(priv->device,
-- priv->plat->phy_node);
-- if (ret < 0) {
-- dev_err(priv->device, "Could not parse MDIO addr\n");
-- return ret;
-- }
-- /* of_mdio_parse_addr returns a valid (0 ~ 31) PHY
-- * address. No need to mask it again.
-- */
-- reg |= ret << H3_EPHY_ADDR_SHIFT;
-+ if (gmac->variant->soc_has_internal_phy) {
-+ if (of_property_read_bool(priv->plat->phy_node,
-+ "allwinner,leds-active-low"))
-+ reg |= H3_EPHY_LED_POL;
-+ else
-+ reg &= ~H3_EPHY_LED_POL;
-+
-+ /* Force EPHY xtal frequency to 24MHz. */
-+ reg |= H3_EPHY_CLK_SEL;
-+
-+ ret = of_mdio_parse_addr(priv->device, priv->plat->phy_node);
-+ if (ret < 0) {
-+ dev_err(priv->device, "Could not parse MDIO addr\n");
-+ return ret;
- }
-+ /* of_mdio_parse_addr returns a valid (0 ~ 31) PHY
-+ * address. No need to mask it again.
-+ */
-+ reg |= 1 << H3_EPHY_ADDR_SHIFT;
- }
-
- if (!of_property_read_u32(node, "allwinner,tx-delay-ps", &val)) {
-@@ -750,81 +899,21 @@ static void sun8i_dwmac_unset_syscon(str
- regmap_write(gmac->regmap, SYSCON_EMAC_REG, reg);
- }
-
--static int sun8i_dwmac_power_internal_phy(struct stmmac_priv *priv)
-+static void sun8i_dwmac_exit(struct platform_device *pdev, void *priv)
- {
-- struct sunxi_priv_data *gmac = priv->plat->bsp_priv;
-- int ret;
--
-- if (!gmac->use_internal_phy)
-- return 0;
-+ struct sunxi_priv_data *gmac = priv;
-
-- ret = clk_prepare_enable(gmac->ephy_clk);
-- if (ret) {
-- dev_err(priv->device, "Cannot enable ephy\n");
-- return ret;
-+ if (gmac->variant->soc_has_internal_phy) {
-+ /* sun8i_dwmac_exit could be called with mdiomux uninit */
-+ if (gmac->mux_handle)
-+ mdio_mux_uninit(gmac->mux_handle);
-+ if (gmac->internal_phy_powered)
-+ sun8i_dwmac_unpower_internal_phy(gmac);
- }
-
-- /* Make sure the EPHY is properly reseted, as U-Boot may leave
-- * it at deasserted state, and thus it may fail to reset EMAC.
-- */
-- reset_control_assert(gmac->rst_ephy);
--
-- ret = reset_control_deassert(gmac->rst_ephy);
-- if (ret) {
-- dev_err(priv->device, "Cannot deassert ephy\n");
-- clk_disable_unprepare(gmac->ephy_clk);
-- return ret;
-- }
--
-- return 0;
--}
--
--static int sun8i_dwmac_unpower_internal_phy(struct sunxi_priv_data *gmac)
--{
-- if (!gmac->use_internal_phy)
-- return 0;
--
-- clk_disable_unprepare(gmac->ephy_clk);
-- reset_control_assert(gmac->rst_ephy);
-- return 0;
--}
--
--/* sun8i_power_phy() - Activate the PHY:
-- * In case of error, no need to call sun8i_unpower_phy(),
-- * it will be called anyway by sun8i_dwmac_exit()
-- */
--static int sun8i_power_phy(struct stmmac_priv *priv)
--{
-- int ret;
--
-- ret = sun8i_dwmac_power_internal_phy(priv);
-- if (ret)
-- return ret;
--
-- ret = sun8i_dwmac_set_syscon(priv);
-- if (ret)
-- return ret;
--
-- /* After changing syscon value, the MAC need reset or it will use
-- * the last value (and so the last PHY set.
-- */
-- ret = sun8i_dwmac_reset(priv);
-- if (ret)
-- return ret;
-- return 0;
--}
--
--static void sun8i_unpower_phy(struct sunxi_priv_data *gmac)
--{
- sun8i_dwmac_unset_syscon(gmac);
-- sun8i_dwmac_unpower_internal_phy(gmac);
--}
--
--static void sun8i_dwmac_exit(struct platform_device *pdev, void *priv)
--{
-- struct sunxi_priv_data *gmac = priv;
-
-- sun8i_unpower_phy(gmac);
-+ reset_control_put(gmac->rst_ephy);
-
- clk_disable_unprepare(gmac->tx_clk);
-
-@@ -853,7 +942,7 @@ static struct mac_device_info *sun8i_dwm
- if (!mac)
- return NULL;
-
-- ret = sun8i_power_phy(priv);
-+ ret = sun8i_dwmac_set_syscon(priv);
- if (ret)
- return NULL;
-
-@@ -895,6 +984,8 @@ static int sun8i_dwmac_probe(struct plat
- struct sunxi_priv_data *gmac;
- struct device *dev = &pdev->dev;
- int ret;
-+ struct stmmac_priv *priv;
-+ struct net_device *ndev;
-
- ret = stmmac_get_platform_resources(pdev, &stmmac_res);
- if (ret)
-@@ -938,29 +1029,6 @@ static int sun8i_dwmac_probe(struct plat
- }
-
- plat_dat->interface = of_get_phy_mode(dev->of_node);
-- if (plat_dat->interface == gmac->variant->internal_phy) {
-- dev_info(&pdev->dev, "Will use internal PHY\n");
-- gmac->use_internal_phy = true;
-- gmac->ephy_clk = of_clk_get(plat_dat->phy_node, 0);
-- if (IS_ERR(gmac->ephy_clk)) {
-- ret = PTR_ERR(gmac->ephy_clk);
-- dev_err(&pdev->dev, "Cannot get EPHY clock: %d\n", ret);
-- return -EINVAL;
-- }
--
-- gmac->rst_ephy = of_reset_control_get(plat_dat->phy_node, NULL);
-- if (IS_ERR(gmac->rst_ephy)) {
-- ret = PTR_ERR(gmac->rst_ephy);
-- if (ret == -EPROBE_DEFER)
-- return ret;
-- dev_err(&pdev->dev, "No EPHY reset control found %d\n",
-- ret);
-- return -EINVAL;
-- }
-- } else {
-- dev_info(&pdev->dev, "Will use external PHY\n");
-- gmac->use_internal_phy = false;
-- }
-
- /* platform data specifying hardware features and callbacks.
- * hardware features were copied from Allwinner drivers.
-@@ -979,9 +1047,34 @@ static int sun8i_dwmac_probe(struct plat
-
- ret = stmmac_dvr_probe(&pdev->dev, plat_dat, &stmmac_res);
- if (ret)
-- sun8i_dwmac_exit(pdev, plat_dat->bsp_priv);
-+ goto dwmac_exit;
-+
-+ ndev = dev_get_drvdata(&pdev->dev);
-+ priv = netdev_priv(ndev);
-+ /* The mux must be registered after parent MDIO
-+ * so after stmmac_dvr_probe()
-+ */
-+ if (gmac->variant->soc_has_internal_phy) {
-+ ret = get_ephy_nodes(priv);
-+ if (ret)
-+ goto dwmac_exit;
-+ ret = sun8i_dwmac_register_mdio_mux(priv);
-+ if (ret) {
-+ dev_err(&pdev->dev, "Failed to register mux\n");
-+ goto dwmac_mux;
-+ }
-+ } else {
-+ ret = sun8i_dwmac_reset(priv);
-+ if (ret)
-+ goto dwmac_exit;
-+ }
-
- return ret;
-+dwmac_mux:
-+ sun8i_dwmac_unset_syscon(gmac);
-+dwmac_exit:
-+ sun8i_dwmac_exit(pdev, plat_dat->bsp_priv);
-+return ret;
- }
-
- static const struct of_device_id sun8i_dwmac_match[] = {
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-08 14:59:56 +0000