This patch has been accepted for linux v5.13.
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
--- /dev/null
+From da6557edb9f3f4513b01d9a20a36c2fbc31810a1 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?=C3=81lvaro=20Fern=C3=A1ndez=20Rojas?= <noltari@gmail.com>
+Date: Mon, 15 Mar 2021 16:45:27 +0100
+Subject: [PATCH 1/2] dt-bindings: net: Add bcm6368-mdio-mux bindings
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Add documentations for bcm6368 mdio mux driver.
+
+Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
+Signed-off-by: David S. Miller <davem@davemloft.net>
+---
+ .../bindings/net/brcm,bcm6368-mdio-mux.yaml | 76 +++++++++++++++++++
+ 1 file changed, 76 insertions(+)
+ create mode 100644 Documentation/devicetree/bindings/net/brcm,bcm6368-mdio-mux.yaml
+
+--- /dev/null
++++ b/Documentation/devicetree/bindings/net/brcm,bcm6368-mdio-mux.yaml
+@@ -0,0 +1,76 @@
++# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
++%YAML 1.2
++---
++$id: http://devicetree.org/schemas/net/brcm,bcm6368-mdio-mux.yaml#
++$schema: http://devicetree.org/meta-schemas/core.yaml#
++
++title: Broadcom BCM6368 MDIO bus multiplexer
++
++maintainers:
++ - Álvaro Fernández Rojas <noltari@gmail.com>
++
++description:
++ This MDIO bus multiplexer defines buses that could be internal as well as
++ external to SoCs. When child bus is selected, one needs to select these two
++ properties as well to generate desired MDIO transaction on appropriate bus.
++
++allOf:
++ - $ref: "mdio.yaml#"
++
++properties:
++ compatible:
++ const: brcm,bcm6368-mdio-mux
++
++ "#address-cells":
++ const: 1
++
++ "#size-cells":
++ const: 0
++
++ reg:
++ maxItems: 1
++
++required:
++ - compatible
++ - reg
++
++patternProperties:
++ '^mdio@[0-1]$':
++ type: object
++ properties:
++ reg:
++ maxItems: 1
++
++ "#address-cells":
++ const: 1
++
++ "#size-cells":
++ const: 0
++
++ required:
++ - reg
++ - "#address-cells"
++ - "#size-cells"
++
++unevaluatedProperties: false
++
++examples:
++ - |
++ mdio0: mdio@10e000b0 {
++ #address-cells = <1>;
++ #size-cells = <0>;
++ compatible = "brcm,bcm6368-mdio-mux";
++ reg = <0x10e000b0 0x6>;
++
++ mdio_int: mdio@0 {
++ #address-cells = <1>;
++ #size-cells = <0>;
++ reg = <0>;
++ };
++
++ mdio_ext: mdio@1 {
++ #address-cells = <1>;
++ #size-cells = <0>;
++ reg = <1>;
++ };
++ };
--- /dev/null
+From e239756717b5c866958823a1609e2ccf268435be Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?=C3=81lvaro=20Fern=C3=A1ndez=20Rojas?= <noltari@gmail.com>
+Date: Mon, 15 Mar 2021 16:45:28 +0100
+Subject: [PATCH 2/2] net: mdio: Add BCM6368 MDIO mux bus controller
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+This controller is present on BCM6318, BCM6328, BCM6362, BCM6368 and BCM63268
+SoCs.
+
+Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
+Signed-off-by: David S. Miller <davem@davemloft.net>
+---
+ drivers/net/mdio/Kconfig | 11 ++
+ drivers/net/mdio/Makefile | 1 +
+ drivers/net/mdio/mdio-mux-bcm6368.c | 184 ++++++++++++++++++++++++++++
+ 3 files changed, 196 insertions(+)
+ create mode 100644 drivers/net/mdio/mdio-mux-bcm6368.c
+
+--- a/drivers/net/mdio/Kconfig
++++ b/drivers/net/mdio/Kconfig
+@@ -200,6 +200,17 @@ config MDIO_BUS_MUX_MESON_G12A
+ the amlogic g12a SoC. The multiplexers connects either the external
+ or the internal MDIO bus to the parent bus.
+
++config MDIO_BUS_MUX_BCM6368
++ tristate "Broadcom BCM6368 MDIO bus multiplexers"
++ depends on OF && OF_MDIO && (BMIPS_GENERIC || COMPILE_TEST)
++ select MDIO_BUS_MUX
++ default BMIPS_GENERIC
++ help
++ This module provides a driver for MDIO bus multiplexers found in
++ BCM6368 based Broadcom SoCs. This multiplexer connects one of several
++ child MDIO bus to a parent bus. Buses could be internal as well as
++ external and selection logic lies inside the same multiplexer.
++
+ config MDIO_BUS_MUX_BCM_IPROC
+ tristate "Broadcom iProc based MDIO bus multiplexers"
+ depends on OF && OF_MDIO && (ARCH_BCM_IPROC || COMPILE_TEST)
+--- a/drivers/net/mdio/Makefile
++++ b/drivers/net/mdio/Makefile
+@@ -22,6 +22,7 @@ obj-$(CONFIG_MDIO_THUNDER) += mdio-thun
+ obj-$(CONFIG_MDIO_XGENE) += mdio-xgene.o
+
+ obj-$(CONFIG_MDIO_BUS_MUX) += mdio-mux.o
++obj-$(CONFIG_MDIO_BUS_MUX_BCM6368) += mdio-mux-bcm6368.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
+--- /dev/null
++++ b/drivers/net/mdio/mdio-mux-bcm6368.c
+@@ -0,0 +1,184 @@
++// SPDX-License-Identifier: GPL-2.0+
++/*
++ * Broadcom BCM6368 mdiomux bus controller driver
++ *
++ * Copyright (C) 2021 Álvaro Fernández Rojas <noltari@gmail.com>
++ */
++
++#include <linux/delay.h>
++#include <linux/io.h>
++#include <linux/kernel.h>
++#include <linux/mdio-mux.h>
++#include <linux/module.h>
++#include <linux/of.h>
++#include <linux/of_platform.h>
++#include <linux/of_mdio.h>
++#include <linux/phy.h>
++#include <linux/platform_device.h>
++#include <linux/sched.h>
++
++#define MDIOC_REG 0x0
++#define MDIOC_EXT_MASK BIT(16)
++#define MDIOC_REG_SHIFT 20
++#define MDIOC_PHYID_SHIFT 25
++#define MDIOC_RD_MASK BIT(30)
++#define MDIOC_WR_MASK BIT(31)
++
++#define MDIOD_REG 0x4
++
++struct bcm6368_mdiomux_desc {
++ void *mux_handle;
++ void __iomem *base;
++ struct device *dev;
++ struct mii_bus *mii_bus;
++ int ext_phy;
++};
++
++static int bcm6368_mdiomux_read(struct mii_bus *bus, int phy_id, int loc)
++{
++ struct bcm6368_mdiomux_desc *md = bus->priv;
++ uint32_t reg;
++ int ret;
++
++ __raw_writel(0, md->base + MDIOC_REG);
++
++ reg = MDIOC_RD_MASK |
++ (phy_id << MDIOC_PHYID_SHIFT) |
++ (loc << MDIOC_REG_SHIFT);
++ if (md->ext_phy)
++ reg |= MDIOC_EXT_MASK;
++
++ __raw_writel(reg, md->base + MDIOC_REG);
++ udelay(50);
++ ret = __raw_readw(md->base + MDIOD_REG);
++
++ return ret;
++}
++
++static int bcm6368_mdiomux_write(struct mii_bus *bus, int phy_id, int loc,
++ uint16_t val)
++{
++ struct bcm6368_mdiomux_desc *md = bus->priv;
++ uint32_t reg;
++
++ __raw_writel(0, md->base + MDIOC_REG);
++
++ reg = MDIOC_WR_MASK |
++ (phy_id << MDIOC_PHYID_SHIFT) |
++ (loc << MDIOC_REG_SHIFT);
++ if (md->ext_phy)
++ reg |= MDIOC_EXT_MASK;
++ reg |= val;
++
++ __raw_writel(reg, md->base + MDIOC_REG);
++ udelay(50);
++
++ return 0;
++}
++
++static int bcm6368_mdiomux_switch_fn(int current_child, int desired_child,
++ void *data)
++{
++ struct bcm6368_mdiomux_desc *md = data;
++
++ md->ext_phy = desired_child;
++
++ return 0;
++}
++
++static int bcm6368_mdiomux_probe(struct platform_device *pdev)
++{
++ struct bcm6368_mdiomux_desc *md;
++ struct mii_bus *bus;
++ struct resource *res;
++ int rc;
++
++ md = devm_kzalloc(&pdev->dev, sizeof(*md), GFP_KERNEL);
++ if (!md)
++ return -ENOMEM;
++ md->dev = &pdev->dev;
++
++ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
++ if (!res)
++ return -EINVAL;
++
++ /*
++ * Just ioremap, as this MDIO block is usually integrated into an
++ * Ethernet MAC controller register range
++ */
++ md->base = devm_ioremap(&pdev->dev, res->start, resource_size(res));
++ if (!md->base) {
++ dev_err(&pdev->dev, "failed to ioremap register\n");
++ return -ENOMEM;
++ }
++
++ md->mii_bus = devm_mdiobus_alloc(&pdev->dev);
++ if (!md->mii_bus) {
++ dev_err(&pdev->dev, "mdiomux bus alloc failed\n");
++ return ENOMEM;
++ }
++
++ bus = md->mii_bus;
++ bus->priv = md;
++ bus->name = "BCM6368 MDIO mux bus";
++ snprintf(bus->id, MII_BUS_ID_SIZE, "%s-%d", pdev->name, pdev->id);
++ bus->parent = &pdev->dev;
++ bus->read = bcm6368_mdiomux_read;
++ bus->write = bcm6368_mdiomux_write;
++ bus->phy_mask = 0x3f;
++ bus->dev.of_node = pdev->dev.of_node;
++
++ rc = mdiobus_register(bus);
++ if (rc) {
++ dev_err(&pdev->dev, "mdiomux registration failed\n");
++ return rc;
++ }
++
++ platform_set_drvdata(pdev, md);
++
++ rc = mdio_mux_init(md->dev, md->dev->of_node,
++ bcm6368_mdiomux_switch_fn, &md->mux_handle, md,
++ md->mii_bus);
++ if (rc) {
++ dev_info(md->dev, "mdiomux initialization failed\n");
++ goto out_register;
++ }
++
++ dev_info(&pdev->dev, "Broadcom BCM6368 MDIO mux bus\n");
++
++ return 0;
++
++out_register:
++ mdiobus_unregister(bus);
++ return rc;
++}
++
++static int bcm6368_mdiomux_remove(struct platform_device *pdev)
++{
++ struct bcm6368_mdiomux_desc *md = platform_get_drvdata(pdev);
++
++ mdio_mux_uninit(md->mux_handle);
++ mdiobus_unregister(md->mii_bus);
++
++ return 0;
++}
++
++static const struct of_device_id bcm6368_mdiomux_ids[] = {
++ { .compatible = "brcm,bcm6368-mdio-mux", },
++ { /* sentinel */ }
++};
++MODULE_DEVICE_TABLE(of, bcm6368_mdiomux_ids);
++
++static struct platform_driver bcm6368_mdiomux_driver = {
++ .driver = {
++ .name = "bcm6368-mdio-mux",
++ .of_match_table = bcm6368_mdiomux_ids,
++ },
++ .probe = bcm6368_mdiomux_probe,
++ .remove = bcm6368_mdiomux_remove,
++};
++module_platform_driver(bcm6368_mdiomux_driver);
++
++MODULE_AUTHOR("Álvaro Fernández Rojas <noltari@gmail.com>");
++MODULE_DESCRIPTION("BCM6368 mdiomux bus controller driver");
++MODULE_LICENSE("GPL v2");
+++ /dev/null
-From b6ecb2bca2b8ff80ae4b1b15f09dcf071f4ceaf4 Mon Sep 17 00:00:00 2001
-From: =?UTF-8?q?=C3=81lvaro=20Fern=C3=A1ndez=20Rojas?= <noltari@gmail.com>
-Date: Mon, 1 Mar 2021 16:42:12 +0100
-Subject: [PATCH] net: mdio: Add BCM6368 MDIO mux bus controller
-MIME-Version: 1.0
-Content-Type: text/plain; charset=UTF-8
-Content-Transfer-Encoding: 8bit
-
-This controller is present on BCM6318, BCM6328, BCM6362, BCM6368 and BCM63268
-SoCs.
-
-Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
----
- drivers/net/mdio/Kconfig | 11 ++
- drivers/net/mdio/Makefile | 1 +
- drivers/net/mdio/mdio-mux-bcm6368.c | 179 ++++++++++++++++++++++++++++
- 3 files changed, 191 insertions(+)
- create mode 100644 drivers/net/mdio/mdio-mux-bcm6368.c
-
---- a/drivers/net/mdio/Kconfig
-+++ b/drivers/net/mdio/Kconfig
-@@ -200,6 +200,17 @@ config MDIO_BUS_MUX_MESON_G12A
- the amlogic g12a SoC. The multiplexers connects either the external
- or the internal MDIO bus to the parent bus.
-
-+config MDIO_BUS_MUX_BCM6368
-+ tristate "Broadcom BCM6368 MDIO bus multiplexers"
-+ depends on OF && OF_MDIO && (BMIPS_GENERIC || COMPILE_TEST)
-+ select MDIO_BUS_MUX
-+ default BMIPS_GENERIC
-+ help
-+ This module provides a driver for MDIO bus multiplexers found in
-+ BCM6368 based Broadcom SoCs. This multiplexer connects one of several
-+ child MDIO bus to a parent bus. Buses could be internal as well as
-+ external and selection logic lies inside the same multiplexer.
-+
- config MDIO_BUS_MUX_BCM_IPROC
- tristate "Broadcom iProc based MDIO bus multiplexers"
- depends on OF && OF_MDIO && (ARCH_BCM_IPROC || COMPILE_TEST)
---- a/drivers/net/mdio/Makefile
-+++ b/drivers/net/mdio/Makefile
-@@ -22,6 +22,7 @@ obj-$(CONFIG_MDIO_THUNDER) += mdio-thun
- obj-$(CONFIG_MDIO_XGENE) += mdio-xgene.o
-
- obj-$(CONFIG_MDIO_BUS_MUX) += mdio-mux.o
-+obj-$(CONFIG_MDIO_BUS_MUX_BCM6368) += mdio-mux-bcm6368.o
- obj-$(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
---- /dev/null
-+++ b/drivers/net/mdio/mdio-mux-bcm6368.c
-@@ -0,0 +1,179 @@
-+// SPDX-License-Identifier: GPL-2.0+
-+/*
-+ * Broadcom BCM6368 mdiomux bus controller driver
-+ *
-+ * Copyright (C) 2021 Álvaro Fernández Rojas <noltari@gmail.com>
-+ */
-+
-+#include <linux/delay.h>
-+#include <linux/io.h>
-+#include <linux/kernel.h>
-+#include <linux/mdio-mux.h>
-+#include <linux/module.h>
-+#include <linux/of.h>
-+#include <linux/of_platform.h>
-+#include <linux/of_mdio.h>
-+#include <linux/phy.h>
-+#include <linux/platform_device.h>
-+#include <linux/sched.h>
-+
-+#define MDIOC_REG 0x0
-+#define MDIOC_EXT_MASK BIT(16)
-+#define MDIOC_REG_SHIFT 20
-+#define MDIOC_PHYID_SHIFT 25
-+#define MDIOC_RD_MASK BIT(30)
-+#define MDIOC_WR_MASK BIT(31)
-+
-+#define MDIOD_REG 0x4
-+
-+struct bcm6368_mdiomux_desc {
-+ void *mux_handle;
-+ void __iomem *base;
-+ struct device *dev;
-+ struct mii_bus *mii_bus;
-+ int ext_phy;
-+};
-+
-+static int bcm6368_mdiomux_read(struct mii_bus *bus, int phy_id, int loc)
-+{
-+ struct bcm6368_mdiomux_desc *md = bus->priv;
-+ uint32_t reg;
-+ int ret;
-+
-+ __raw_writel(0, md->base + MDIOC_REG);
-+
-+ reg = MDIOC_RD_MASK |
-+ (phy_id << MDIOC_PHYID_SHIFT) |
-+ (loc << MDIOC_REG_SHIFT);
-+ if (md->ext_phy)
-+ reg |= MDIOC_EXT_MASK;
-+
-+ __raw_writel(reg, md->base + MDIOC_REG);
-+ udelay(50);
-+ ret = __raw_readw(md->base + MDIOD_REG);
-+
-+ return ret;
-+}
-+
-+static int bcm6368_mdiomux_write(struct mii_bus *bus, int phy_id, int loc,
-+ uint16_t val)
-+{
-+ struct bcm6368_mdiomux_desc *md = bus->priv;
-+ uint32_t reg;
-+
-+ __raw_writel(0, md->base + MDIOC_REG);
-+
-+ reg = MDIOC_WR_MASK |
-+ (phy_id << MDIOC_PHYID_SHIFT) |
-+ (loc << MDIOC_REG_SHIFT);
-+ if (md->ext_phy)
-+ reg |= MDIOC_EXT_MASK;
-+ reg |= val;
-+
-+ __raw_writel(reg, md->base + MDIOC_REG);
-+ udelay(50);
-+
-+ return 0;
-+}
-+
-+static int bcm6368_mdiomux_switch_fn(int current_child, int desired_child,
-+ void *data)
-+{
-+ struct bcm6368_mdiomux_desc *md = data;
-+
-+ md->ext_phy = desired_child;
-+
-+ return 0;
-+}
-+
-+static int bcm6368_mdiomux_probe(struct platform_device *pdev)
-+{
-+ struct bcm6368_mdiomux_desc *md;
-+ struct mii_bus *bus;
-+ struct resource *res;
-+ int rc;
-+
-+ md = devm_kzalloc(&pdev->dev, sizeof(*md), GFP_KERNEL);
-+ if (!md)
-+ return -ENOMEM;
-+ md->dev = &pdev->dev;
-+
-+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-+ if (!res)
-+ return -EINVAL;
-+
-+ /* Just ioremap, as this MDIO block is usually integrated into an
-+ * Ethernet MAC controller register range
-+ */
-+ md->base = devm_ioremap(&pdev->dev, res->start, resource_size(res));
-+ if (!md->base) {
-+ dev_err(&pdev->dev, "failed to ioremap register\n");
-+ return -ENOMEM;
-+ }
-+
-+ md->mii_bus = devm_mdiobus_alloc(&pdev->dev);
-+ if (!md->mii_bus) {
-+ dev_err(&pdev->dev, "mdiomux bus alloc failed\n");
-+ return ENOMEM;
-+ }
-+
-+ bus = md->mii_bus;
-+ bus->priv = md;
-+ bus->name = "BCM6368 MDIO mux bus";
-+ snprintf(bus->id, MII_BUS_ID_SIZE, "%s-%d", pdev->name, pdev->id);
-+ bus->parent = &pdev->dev;
-+ bus->read = bcm6368_mdiomux_read;
-+ bus->write = bcm6368_mdiomux_write;
-+ bus->phy_mask = 0x3f;
-+ bus->dev.of_node = pdev->dev.of_node;
-+
-+ rc = mdiobus_register(bus);
-+ if (rc) {
-+ dev_err(&pdev->dev, "mdiomux registration failed\n");
-+ return rc;
-+ }
-+
-+ platform_set_drvdata(pdev, md);
-+
-+ rc = mdio_mux_init(md->dev, md->dev->of_node,
-+ bcm6368_mdiomux_switch_fn, &md->mux_handle, md,
-+ md->mii_bus);
-+ if (rc) {
-+ dev_info(md->dev, "mdiomux initialization failed\n");
-+ goto out_register;
-+ }
-+
-+ dev_info(&pdev->dev, "Broadcom BCM6368 MDIO mux bus\n");
-+
-+ return 0;
-+
-+out_register:
-+ mdiobus_unregister(bus);
-+ return rc;
-+}
-+
-+static int bcm6368_mdiomux_remove(struct platform_device *pdev)
-+{
-+ struct bcm6368_mdiomux_desc *md = platform_get_drvdata(pdev);
-+
-+ mdio_mux_uninit(md->mux_handle);
-+ mdiobus_unregister(md->mii_bus);
-+
-+ return 0;
-+}
-+
-+static const struct of_device_id bcm6368_mdiomux_ids[] = {
-+ { .compatible = "brcm,bcm6368-mdio-mux", },
-+ { /* sentinel */ }
-+};
-+MODULE_DEVICE_TABLE(of, bcm6368_mdiomux_ids);
-+
-+static struct platform_driver bcm6368_mdiomux_driver = {
-+ .driver = {
-+ .name = "bcm6368-mdio-mux",
-+ .of_match_table = bcm6368_mdiomux_ids,
-+ },
-+ .probe = bcm6368_mdiomux_probe,
-+ .remove = bcm6368_mdiomux_remove,
-+};
-+module_platform_driver(bcm6368_mdiomux_driver);
projects / openwrt / staging / noltari.git / commitdiff