From 867934e9c9babe9192797726f6910554bbdc28ce Mon Sep 17 00:00:00 2001 From: Jerome Brunet Date: Thu, 4 Apr 2019 15:11:44 +0200 Subject: [PATCH 1/4] dt-bindings: net: phy: add g12a mdio mux documentation Add documentation for the device tree bindings of the MDIO mux of Amlogic g12a SoC family Reviewed-by: Rob Herring Signed-off-by: Jerome Brunet Signed-off-by: David S. Miller --- .../bindings/net/mdio-mux-meson-g12a.txt | 48 +++++++++++++++++++ 1 file changed, 48 insertions(+) create mode 100644 Documentation/devicetree/bindings/net/mdio-mux-meson-g12a.txt diff --git a/Documentation/devicetree/bindings/net/mdio-mux-meson-g12a.txt b/Documentation/devicetree/bindings/net/mdio-mux-meson-g12a.txt new file mode 100644 index 000000000000..3a96cbed9294 --- /dev/null +++ b/Documentation/devicetree/bindings/net/mdio-mux-meson-g12a.txt @@ -0,0 +1,48 @@ +Properties for the MDIO bus multiplexer/glue of Amlogic G12a SoC family. + +This is a special case of a MDIO bus multiplexer. It allows to choose between +the internal mdio bus leading to the embedded 10/100 PHY or the external +MDIO bus. + +Required properties in addition to the generic multiplexer properties: +- compatible : amlogic,g12a-mdio-mux +- reg: physical address and length of the multiplexer/glue registers +- clocks: list of clock phandle, one for each entry clock-names. +- clock-names: should contain the following: + * "pclk" : peripheral clock. + * "clkin0" : platform crytal + * "clkin1" : SoC 50MHz MPLL + +Example : + +mdio_mux: mdio-multiplexer@4c000 { + compatible = "amlogic,g12a-mdio-mux"; + reg = <0x0 0x4c000 0x0 0xa4>; + clocks = <&clkc CLKID_ETH_PHY>, + <&xtal>, + <&clkc CLKID_MPLL_5OM>; + clock-names = "pclk", "clkin0", "clkin1"; + mdio-parent-bus = <&mdio0>; + #address-cells = <1>; + #size-cells = <0>; + + ext_mdio: mdio@0 { + reg = <0>; + #address-cells = <1>; + #size-cells = <0>; + }; + + int_mdio: mdio@1 { + reg = <1>; + #address-cells = <1>; + #size-cells = <0>; + + internal_ephy: ethernet-phy@8 { + compatible = "ethernet-phy-id0180.3301", + "ethernet-phy-ieee802.3-c22"; + interrupts = ; + reg = <8>; + max-speed = <100>; + }; + }; +}; From 7090425104dbd87959bd424e9bd5a8711fde0986 Mon Sep 17 00:00:00 2001 From: Jerome Brunet Date: Thu, 4 Apr 2019 15:11:45 +0200 Subject: [PATCH 2/4] net: phy: add amlogic g12a mdio mux support Add support for the mdio mux and internal phy glue of the g12a SoC family Reviewed-by: Neil Armstrong # clk parts Signed-off-by: Jerome Brunet Signed-off-by: David S. Miller --- drivers/net/phy/Kconfig | 11 + drivers/net/phy/Makefile | 1 + drivers/net/phy/mdio-mux-meson-g12a.c | 380 ++++++++++++++++++++++++++ 3 files changed, 392 insertions(+) create mode 100644 drivers/net/phy/mdio-mux-meson-g12a.c diff --git a/drivers/net/phy/Kconfig b/drivers/net/phy/Kconfig index 1c66e92c717c..d408b2eb2966 100644 --- a/drivers/net/phy/Kconfig +++ b/drivers/net/phy/Kconfig @@ -76,6 +76,17 @@ config MDIO_BUS_MUX_GPIO several child MDIO busses to a parent bus. Child bus selection is under the control of GPIO lines. +config MDIO_BUS_MUX_MESON_G12A + tristate "Amlogic G12a based MDIO bus multiplexer" + depends on ARCH_MESON || COMPILE_TEST + depends on OF_MDIO && HAS_IOMEM && COMMON_CLK + select MDIO_BUS_MUX + default m if ARCH_MESON + help + This module provides a driver for the MDIO multiplexer/glue of + the amlogic g12a SoC. The multiplexers connects either the external + or the internal MDIO bus to the parent bus. + config MDIO_BUS_MUX_MMIOREG tristate "MMIO device-controlled MDIO bus multiplexers" depends on OF_MDIO && HAS_IOMEM diff --git a/drivers/net/phy/Makefile b/drivers/net/phy/Makefile index ece5dae67174..27d7f9f3b0de 100644 --- a/drivers/net/phy/Makefile +++ b/drivers/net/phy/Makefile @@ -28,6 +28,7 @@ obj-$(CONFIG_MDIO_BITBANG) += mdio-bitbang.o obj-$(CONFIG_MDIO_BUS_MUX) += mdio-mux.o obj-$(CONFIG_MDIO_BUS_MUX_BCM_IPROC) += mdio-mux-bcm-iproc.o obj-$(CONFIG_MDIO_BUS_MUX_GPIO) += mdio-mux-gpio.o +obj-$(CONFIG_MDIO_BUS_MUX_MESON_G12A) += mdio-mux-meson-g12a.o obj-$(CONFIG_MDIO_BUS_MUX_MMIOREG) += mdio-mux-mmioreg.o obj-$(CONFIG_MDIO_BUS_MUX_MULTIPLEXER) += mdio-mux-multiplexer.o obj-$(CONFIG_MDIO_CAVIUM) += mdio-cavium.o diff --git a/drivers/net/phy/mdio-mux-meson-g12a.c b/drivers/net/phy/mdio-mux-meson-g12a.c new file mode 100644 index 000000000000..6fa29ea8e2a3 --- /dev/null +++ b/drivers/net/phy/mdio-mux-meson-g12a.c @@ -0,0 +1,380 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2019 Baylibre, SAS. + * Author: Jerome Brunet + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define ETH_PLL_STS 0x40 +#define ETH_PLL_CTL0 0x44 +#define PLL_CTL0_LOCK_DIG BIT(30) +#define PLL_CTL0_RST BIT(29) +#define PLL_CTL0_EN BIT(28) +#define PLL_CTL0_SEL BIT(23) +#define PLL_CTL0_N GENMASK(14, 10) +#define PLL_CTL0_M GENMASK(8, 0) +#define PLL_LOCK_TIMEOUT 1000000 +#define PLL_MUX_NUM_PARENT 2 +#define ETH_PLL_CTL1 0x48 +#define ETH_PLL_CTL2 0x4c +#define ETH_PLL_CTL3 0x50 +#define ETH_PLL_CTL4 0x54 +#define ETH_PLL_CTL5 0x58 +#define ETH_PLL_CTL6 0x5c +#define ETH_PLL_CTL7 0x60 + +#define ETH_PHY_CNTL0 0x80 +#define EPHY_G12A_ID 0x33000180 +#define ETH_PHY_CNTL1 0x84 +#define PHY_CNTL1_ST_MODE GENMASK(2, 0) +#define PHY_CNTL1_ST_PHYADD GENMASK(7, 3) +#define EPHY_DFLT_ADD 8 +#define PHY_CNTL1_MII_MODE GENMASK(15, 14) +#define EPHY_MODE_RMII 0x1 +#define PHY_CNTL1_CLK_EN BIT(16) +#define PHY_CNTL1_CLKFREQ BIT(17) +#define PHY_CNTL1_PHY_ENB BIT(18) +#define ETH_PHY_CNTL2 0x88 +#define PHY_CNTL2_USE_INTERNAL BIT(5) +#define PHY_CNTL2_SMI_SRC_MAC BIT(6) +#define PHY_CNTL2_RX_CLK_EPHY BIT(9) + +#define MESON_G12A_MDIO_EXTERNAL_ID 0 +#define MESON_G12A_MDIO_INTERNAL_ID 1 + +struct g12a_mdio_mux { + bool pll_is_enabled; + void __iomem *regs; + void *mux_handle; + struct clk *pclk; + struct clk *pll; +}; + +struct g12a_ephy_pll { + void __iomem *base; + struct clk_hw hw; +}; + +#define g12a_ephy_pll_to_dev(_hw) \ + container_of(_hw, struct g12a_ephy_pll, hw) + +static unsigned long g12a_ephy_pll_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct g12a_ephy_pll *pll = g12a_ephy_pll_to_dev(hw); + u32 val, m, n; + + val = readl(pll->base + ETH_PLL_CTL0); + m = FIELD_GET(PLL_CTL0_M, val); + n = FIELD_GET(PLL_CTL0_N, val); + + return parent_rate * m / n; +} + +static int g12a_ephy_pll_enable(struct clk_hw *hw) +{ + struct g12a_ephy_pll *pll = g12a_ephy_pll_to_dev(hw); + u32 val = readl(pll->base + ETH_PLL_CTL0); + + /* Apply both enable an reset */ + val |= PLL_CTL0_RST | PLL_CTL0_EN; + writel(val, pll->base + ETH_PLL_CTL0); + + /* Clear the reset to let PLL lock */ + val &= ~PLL_CTL0_RST; + writel(val, pll->base + ETH_PLL_CTL0); + + /* Poll on the digital lock instead of the usual analog lock + * This is done because bit 31 is unreliable on some SoC. Bit + * 31 may indicate that the PLL is not lock eventhough the clock + * is actually running + */ + return readl_poll_timeout(pll->base + ETH_PLL_CTL0, val, + val & PLL_CTL0_LOCK_DIG, 0, PLL_LOCK_TIMEOUT); +} + +static void g12a_ephy_pll_disable(struct clk_hw *hw) +{ + struct g12a_ephy_pll *pll = g12a_ephy_pll_to_dev(hw); + u32 val; + + val = readl(pll->base + ETH_PLL_CTL0); + val &= ~PLL_CTL0_EN; + val |= PLL_CTL0_RST; + writel(val, pll->base + ETH_PLL_CTL0); +} + +static int g12a_ephy_pll_is_enabled(struct clk_hw *hw) +{ + struct g12a_ephy_pll *pll = g12a_ephy_pll_to_dev(hw); + unsigned int val; + + val = readl(pll->base + ETH_PLL_CTL0); + + return (val & PLL_CTL0_LOCK_DIG) ? 1 : 0; +} + +static void g12a_ephy_pll_init(struct clk_hw *hw) +{ + struct g12a_ephy_pll *pll = g12a_ephy_pll_to_dev(hw); + + /* Apply PLL HW settings */ + writel(0x29c0040a, pll->base + ETH_PLL_CTL0); + writel(0x927e0000, pll->base + ETH_PLL_CTL1); + writel(0xac5f49e5, pll->base + ETH_PLL_CTL2); + writel(0x00000000, pll->base + ETH_PLL_CTL3); + writel(0x00000000, pll->base + ETH_PLL_CTL4); + writel(0x20200000, pll->base + ETH_PLL_CTL5); + writel(0x0000c002, pll->base + ETH_PLL_CTL6); + writel(0x00000023, pll->base + ETH_PLL_CTL7); +} + +static const struct clk_ops g12a_ephy_pll_ops = { + .recalc_rate = g12a_ephy_pll_recalc_rate, + .is_enabled = g12a_ephy_pll_is_enabled, + .enable = g12a_ephy_pll_enable, + .disable = g12a_ephy_pll_disable, + .init = g12a_ephy_pll_init, +}; + +static int g12a_enable_internal_mdio(struct g12a_mdio_mux *priv) +{ + int ret; + + /* Enable the phy clock */ + if (!priv->pll_is_enabled) { + ret = clk_prepare_enable(priv->pll); + if (ret) + return ret; + } + + priv->pll_is_enabled = true; + + /* Initialize ephy control */ + writel(EPHY_G12A_ID, priv->regs + ETH_PHY_CNTL0); + writel(FIELD_PREP(PHY_CNTL1_ST_MODE, 3) | + FIELD_PREP(PHY_CNTL1_ST_PHYADD, EPHY_DFLT_ADD) | + FIELD_PREP(PHY_CNTL1_MII_MODE, EPHY_MODE_RMII) | + PHY_CNTL1_CLK_EN | + PHY_CNTL1_CLKFREQ | + PHY_CNTL1_PHY_ENB, + priv->regs + ETH_PHY_CNTL1); + writel(PHY_CNTL2_USE_INTERNAL | + PHY_CNTL2_SMI_SRC_MAC | + PHY_CNTL2_RX_CLK_EPHY, + priv->regs + ETH_PHY_CNTL2); + + return 0; +} + +static int g12a_enable_external_mdio(struct g12a_mdio_mux *priv) +{ + /* Reset the mdio bus mux */ + writel_relaxed(0x0, priv->regs + ETH_PHY_CNTL2); + + /* Disable the phy clock if enabled */ + if (priv->pll_is_enabled) { + clk_disable_unprepare(priv->pll); + priv->pll_is_enabled = false; + } + + return 0; +} + +static int g12a_mdio_switch_fn(int current_child, int desired_child, + void *data) +{ + struct g12a_mdio_mux *priv = dev_get_drvdata(data); + + if (current_child == desired_child) + return 0; + + switch (desired_child) { + case MESON_G12A_MDIO_EXTERNAL_ID: + return g12a_enable_external_mdio(priv); + case MESON_G12A_MDIO_INTERNAL_ID: + return g12a_enable_internal_mdio(priv); + default: + return -EINVAL; + } +} + +static const struct of_device_id g12a_mdio_mux_match[] = { + { .compatible = "amlogic,g12a-mdio-mux", }, + {}, +}; +MODULE_DEVICE_TABLE(of, g12a_mdio_mux_match); + +static int g12a_ephy_glue_clk_register(struct device *dev) +{ + struct g12a_mdio_mux *priv = dev_get_drvdata(dev); + const char *parent_names[PLL_MUX_NUM_PARENT]; + struct clk_init_data init; + struct g12a_ephy_pll *pll; + struct clk_mux *mux; + struct clk *clk; + char *name; + int i; + + /* get the mux parents */ + for (i = 0; i < PLL_MUX_NUM_PARENT; i++) { + char in_name[8]; + + snprintf(in_name, sizeof(in_name), "clkin%d", i); + clk = devm_clk_get(dev, in_name); + if (IS_ERR(clk)) { + if (PTR_ERR(clk) != -EPROBE_DEFER) + dev_err(dev, "Missing clock %s\n", in_name); + return PTR_ERR(clk); + } + + parent_names[i] = __clk_get_name(clk); + } + + /* create the input mux */ + mux = devm_kzalloc(dev, sizeof(*mux), GFP_KERNEL); + if (!mux) + return -ENOMEM; + + name = kasprintf(GFP_KERNEL, "%s#mux", dev_name(dev)); + if (!name) + return -ENOMEM; + + init.name = name; + init.ops = &clk_mux_ro_ops; + init.flags = 0; + init.parent_names = parent_names; + init.num_parents = PLL_MUX_NUM_PARENT; + + mux->reg = priv->regs + ETH_PLL_CTL0; + mux->shift = __ffs(PLL_CTL0_SEL); + mux->mask = PLL_CTL0_SEL >> mux->shift; + mux->hw.init = &init; + + clk = devm_clk_register(dev, &mux->hw); + kfree(name); + if (IS_ERR(clk)) { + dev_err(dev, "failed to register input mux\n"); + return PTR_ERR(clk); + } + + /* create the pll */ + pll = devm_kzalloc(dev, sizeof(*pll), GFP_KERNEL); + if (!pll) + return -ENOMEM; + + name = kasprintf(GFP_KERNEL, "%s#pll", dev_name(dev)); + if (!name) + return -ENOMEM; + + init.name = name; + init.ops = &g12a_ephy_pll_ops; + init.flags = 0; + parent_names[0] = __clk_get_name(clk); + init.parent_names = parent_names; + init.num_parents = 1; + + pll->base = priv->regs; + pll->hw.init = &init; + + clk = devm_clk_register(dev, &pll->hw); + kfree(name); + if (IS_ERR(clk)) { + dev_err(dev, "failed to register input mux\n"); + return PTR_ERR(clk); + } + + priv->pll = clk; + + return 0; +} + +static int g12a_mdio_mux_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct g12a_mdio_mux *priv; + struct resource *res; + int ret; + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + platform_set_drvdata(pdev, priv); + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + priv->regs = devm_ioremap_resource(dev, res); + if (IS_ERR(priv->regs)) + return PTR_ERR(priv->regs); + + priv->pclk = devm_clk_get(dev, "pclk"); + if (IS_ERR(priv->pclk)) { + ret = PTR_ERR(priv->pclk); + if (ret != -EPROBE_DEFER) + dev_err(dev, "failed to get peripheral clock\n"); + return ret; + } + + /* Make sure the device registers are clocked */ + ret = clk_prepare_enable(priv->pclk); + if (ret) { + dev_err(dev, "failed to enable peripheral clock"); + return ret; + } + + /* Register PLL in CCF */ + ret = g12a_ephy_glue_clk_register(dev); + if (ret) + goto err; + + ret = mdio_mux_init(dev, dev->of_node, g12a_mdio_switch_fn, + &priv->mux_handle, dev, NULL); + if (ret) { + if (ret != -EPROBE_DEFER) + dev_err(dev, "mdio multiplexer init failed: %d", ret); + goto err; + } + + return 0; + +err: + clk_disable_unprepare(priv->pclk); + return ret; +} + +static int g12a_mdio_mux_remove(struct platform_device *pdev) +{ + struct g12a_mdio_mux *priv = platform_get_drvdata(pdev); + + mdio_mux_uninit(priv->mux_handle); + + if (priv->pll_is_enabled) + clk_disable_unprepare(priv->pll); + + clk_disable_unprepare(priv->pclk); + + return 0; +} + +static struct platform_driver g12a_mdio_mux_driver = { + .probe = g12a_mdio_mux_probe, + .remove = g12a_mdio_mux_remove, + .driver = { + .name = "g12a-mdio_mux", + .of_match_table = g12a_mdio_mux_match, + }, +}; +module_platform_driver(g12a_mdio_mux_driver); + +MODULE_DESCRIPTION("Amlogic G12a MDIO multiplexer driver"); +MODULE_AUTHOR("Jerome Brunet "); +MODULE_LICENSE("GPL v2"); From 5c3407abb3382fb0621a503662d00495f7ab65c4 Mon Sep 17 00:00:00 2001 From: Jerome Brunet Date: Thu, 4 Apr 2019 15:11:46 +0200 Subject: [PATCH 3/4] net: phy: meson-gxl: add g12a support The g12a SoC family uses the type of internal PHY that was used on the gxl family. The quirks of gxl family, like the LPA register corruption, appear to have been resolved on this new SoC generation. Signed-off-by: Jerome Brunet Reviewed-by: Florian Fainelli Signed-off-by: David S. Miller --- drivers/net/phy/meson-gxl.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/drivers/net/phy/meson-gxl.c b/drivers/net/phy/meson-gxl.c index 0eec2913c289..2033c93a46ca 100644 --- a/drivers/net/phy/meson-gxl.c +++ b/drivers/net/phy/meson-gxl.c @@ -237,11 +237,22 @@ static struct phy_driver meson_gxl_phy[] = { .config_intr = meson_gxl_config_intr, .suspend = genphy_suspend, .resume = genphy_resume, + }, { + PHY_ID_MATCH_EXACT(0x01803301), + .name = "Meson G12A Internal PHY", + .features = PHY_BASIC_FEATURES, + .flags = PHY_IS_INTERNAL, + .soft_reset = genphy_soft_reset, + .ack_interrupt = meson_gxl_ack_interrupt, + .config_intr = meson_gxl_config_intr, + .suspend = genphy_suspend, + .resume = genphy_resume, }, }; static struct mdio_device_id __maybe_unused meson_gxl_tbl[] = { { 0x01814400, 0xfffffff0 }, + { PHY_ID_MATCH_VENDOR(0x01803301) }, { } }; From fad137c4ef073c45fe7696680a555262d48319db Mon Sep 17 00:00:00 2001 From: Jerome Brunet Date: Thu, 4 Apr 2019 15:11:47 +0200 Subject: [PATCH 4/4] net: phy: meson-gxl: clean-up gxl variant driver The purpose of this change is to align the gxl and g12a driver declaration. Like on the g12a variant, remove genphy_aneg_done() from the driver declaration as the net phy framework will default to it anyway. Also, the gxl phy id should be an exact match as well, so let's change this and use the macro provided. Signed-off-by: Jerome Brunet Reviewed-by: Florian Fainelli Signed-off-by: David S. Miller --- drivers/net/phy/meson-gxl.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/drivers/net/phy/meson-gxl.c b/drivers/net/phy/meson-gxl.c index 2033c93a46ca..6d4a8c508ec0 100644 --- a/drivers/net/phy/meson-gxl.c +++ b/drivers/net/phy/meson-gxl.c @@ -224,14 +224,12 @@ static int meson_gxl_config_intr(struct phy_device *phydev) static struct phy_driver meson_gxl_phy[] = { { - .phy_id = 0x01814400, - .phy_id_mask = 0xfffffff0, + PHY_ID_MATCH_EXACT(0x01814400), .name = "Meson GXL Internal PHY", .features = PHY_BASIC_FEATURES, .flags = PHY_IS_INTERNAL, .soft_reset = genphy_soft_reset, .config_init = meson_gxl_config_init, - .aneg_done = genphy_aneg_done, .read_status = meson_gxl_read_status, .ack_interrupt = meson_gxl_ack_interrupt, .config_intr = meson_gxl_config_intr, @@ -251,7 +249,7 @@ static struct phy_driver meson_gxl_phy[] = { }; static struct mdio_device_id __maybe_unused meson_gxl_tbl[] = { - { 0x01814400, 0xfffffff0 }, + { PHY_ID_MATCH_VENDOR(0x01814400) }, { PHY_ID_MATCH_VENDOR(0x01803301) }, { } };