net: dsa: vsc73xx: add support for parallel mode (631e83bf) · Commits · e / devices / android_kernel_fairphone_FP5

drivers/net/dsa/Kconfig

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		@@ -116,4 +116,13 @@ config NET_DSA_VITESSE_VSC73XX_SPI
		---help---
		This enables support for the Vitesse VSC7385, VSC7388, VSC7395
		and VSC7398 SparX integrated ethernet switches in SPI managed mode.

		config NET_DSA_VITESSE_VSC73XX_PLATFORM
		tristate "Vitesse VSC7385/7388/7395/7398 Platform mode support"
		depends on HAS_IOMEM
		select NET_DSA_VITESSE_VSC73XX
		---help---
		This enables support for the Vitesse VSC7385, VSC7388, VSC7395
		and VSC7398 SparX integrated ethernet switches, connected over
		a CPU-attached address bus and work in memory-mapped I/O mode.
		endmenu

drivers/net/dsa/Makefile

+1 −0

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		@@ -15,6 +15,7 @@ obj-$(CONFIG_NET_DSA_SMSC_LAN9303) += lan9303-core.o
		obj-$(CONFIG_NET_DSA_SMSC_LAN9303_I2C) += lan9303_i2c.o
		obj-$(CONFIG_NET_DSA_SMSC_LAN9303_MDIO) += lan9303_mdio.o
		obj-$(CONFIG_NET_DSA_VITESSE_VSC73XX) += vitesse-vsc73xx-core.o
		obj-$(CONFIG_NET_DSA_VITESSE_VSC73XX_PLATFORM) += vitesse-vsc73xx-platform.o
		obj-$(CONFIG_NET_DSA_VITESSE_VSC73XX_SPI) += vitesse-vsc73xx-spi.o
		obj-y += b53/
		obj-y += microchip/

drivers/net/dsa/vitesse-vsc73xx-platform.c

0 → 100644

+164 −0

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		// SPDX-License-Identifier: GPL-2.0
		/* DSA driver for:
		* Vitesse VSC7385 SparX-G5 5+1-port Integrated Gigabit Ethernet Switch
		* Vitesse VSC7388 SparX-G8 8-port Integrated Gigabit Ethernet Switch
		* Vitesse VSC7395 SparX-G5e 5+1-port Integrated Gigabit Ethernet Switch
		* Vitesse VSC7398 SparX-G8e 8-port Integrated Gigabit Ethernet Switch
		*
		* This driver takes control of the switch chip connected over CPU-attached
		* address bus and configures it to route packages around when connected to
		* a CPU port.
		*
		* Copyright (C) 2019 Pawel Dembicki <paweldembicki@gmail.com>
		* Based on vitesse-vsc-spi.c by:
		* Copyright (C) 2018 Linus Wallej <linus.walleij@linaro.org>
		* Includes portions of code from the firmware uploader by:
		* Copyright (C) 2009 Gabor Juhos <juhosg@openwrt.org>
		*/
		#include <linux/kernel.h>
		#include <linux/module.h>
		#include <linux/of.h>
		#include <linux/platform_device.h>

		#include "vitesse-vsc73xx.h"

		#define VSC73XX_CMD_PLATFORM_BLOCK_SHIFT 14
		#define VSC73XX_CMD_PLATFORM_BLOCK_MASK 0x7
		#define VSC73XX_CMD_PLATFORM_SUBBLOCK_SHIFT 10
		#define VSC73XX_CMD_PLATFORM_SUBBLOCK_MASK 0xf
		#define VSC73XX_CMD_PLATFORM_REGISTER_SHIFT 2

		/**
		* struct vsc73xx_platform - VSC73xx Platform state container
		*/
		struct vsc73xx_platform {
		struct platform_device *pdev;
		void __iomem *base_addr;
		struct vsc73xx vsc;
		};

		static const struct vsc73xx_ops vsc73xx_platform_ops;

		static u32 vsc73xx_make_addr(u8 block, u8 subblock, u8 reg)
		{
		u32 ret;

		ret = (block & VSC73XX_CMD_PLATFORM_BLOCK_MASK)
		<< VSC73XX_CMD_PLATFORM_BLOCK_SHIFT;
		ret \|= (subblock & VSC73XX_CMD_PLATFORM_SUBBLOCK_MASK)
		<< VSC73XX_CMD_PLATFORM_SUBBLOCK_SHIFT;
		ret \|= reg << VSC73XX_CMD_PLATFORM_REGISTER_SHIFT;

		return ret;
		}

		static int vsc73xx_platform_read(struct vsc73xx *vsc, u8 block, u8 subblock,
		u8 reg, u32 *val)
		{
		struct vsc73xx_platform *vsc_platform = vsc->priv;
		u32 offset;

		if (!vsc73xx_is_addr_valid(block, subblock))
		return -EINVAL;

		offset = vsc73xx_make_addr(block, subblock, reg);
		/* By default vsc73xx running in big-endian mode.
		* (See "Register Addressing" section 5.5.3 in the VSC7385 manual.)
		*/
		*val = ioread32be(vsc_platform->base_addr + offset);

		return 0;
		}

		static int vsc73xx_platform_write(struct vsc73xx *vsc, u8 block, u8 subblock,
		u8 reg, u32 val)
		{
		struct vsc73xx_platform *vsc_platform = vsc->priv;
		u32 offset;

		if (!vsc73xx_is_addr_valid(block, subblock))
		return -EINVAL;

		offset = vsc73xx_make_addr(block, subblock, reg);
		iowrite32be(val, vsc_platform->base_addr + offset);

		return 0;
		}

		static int vsc73xx_platform_probe(struct platform_device *pdev)
		{
		struct device *dev = &pdev->dev;
		struct vsc73xx_platform *vsc_platform;
		struct resource *res = NULL;
		int ret;

		vsc_platform = devm_kzalloc(dev, sizeof(*vsc_platform), GFP_KERNEL);
		if (!vsc_platform)
		return -ENOMEM;

		platform_set_drvdata(pdev, vsc_platform);
		vsc_platform->pdev = pdev;
		vsc_platform->vsc.dev = dev;
		vsc_platform->vsc.priv = vsc_platform;
		vsc_platform->vsc.ops = &vsc73xx_platform_ops;

		/* obtain I/O memory space */
		res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
		if (!res) {
		dev_err(&pdev->dev, "cannot obtain I/O memory space\n");
		ret = -ENXIO;
		return ret;
		}

		vsc_platform->base_addr = devm_ioremap_resource(&pdev->dev, res);
		if (IS_ERR(vsc_platform->base_addr)) {
		dev_err(&pdev->dev, "cannot request I/O memory space\n");
		ret = -ENXIO;
		return ret;
		}

		return vsc73xx_probe(&vsc_platform->vsc);
		}

		static int vsc73xx_platform_remove(struct platform_device *pdev)
		{
		struct vsc73xx_platform *vsc_platform = platform_get_drvdata(pdev);

		return vsc73xx_remove(&vsc_platform->vsc);
		}

		static const struct vsc73xx_ops vsc73xx_platform_ops = {
		.read = vsc73xx_platform_read,
		.write = vsc73xx_platform_write,
		};

		static const struct of_device_id vsc73xx_of_match[] = {
		{
		.compatible = "vitesse,vsc7385",
		},
		{
		.compatible = "vitesse,vsc7388",
		},
		{
		.compatible = "vitesse,vsc7395",
		},
		{
		.compatible = "vitesse,vsc7398",
		},
		{ },
		};
		MODULE_DEVICE_TABLE(of, vsc73xx_of_match);

		static struct platform_driver vsc73xx_platform_driver = {
		.probe = vsc73xx_platform_probe,
		.remove = vsc73xx_platform_remove,
		.driver = {
		.name = "vsc73xx-platform",
		.of_match_table = vsc73xx_of_match,
		},
		};
		module_platform_driver(vsc73xx_platform_driver);

		MODULE_AUTHOR("Pawel Dembicki <paweldembicki@gmail.com>");
		MODULE_DESCRIPTION("Vitesse VSC7385/7388/7395/7398 Platform driver");
		MODULE_LICENSE("GPL v2");