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Message-Id: <20230331-topic-oxnas-upstream-remove-v1-11-5bd58fd1dd1f@linaro.org>
Date: Fri, 31 Mar 2023 10:34:49 +0200
From: Neil Armstrong <neil.armstrong@...aro.org>
To: Arnd Bergmann <arnd@...db.de>, Olof Johansson <olof@...om.net>,
soc@...nel.org, Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Russell King <linux@...linux.org.uk>,
Michael Turquette <mturquette@...libre.com>,
Stephen Boyd <sboyd@...nel.org>,
Daniel Lezcano <daniel.lezcano@...aro.org>,
Thomas Gleixner <tglx@...utronix.de>,
Miquel Raynal <miquel.raynal@...tlin.com>,
Richard Weinberger <richard@....at>,
Vignesh Raghavendra <vigneshr@...com>,
Giuseppe Cavallaro <peppe.cavallaro@...com>,
Alexandre Torgue <alexandre.torgue@...s.st.com>,
Jose Abreu <joabreu@...opsys.com>,
"David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>,
Maxime Coquelin <mcoquelin.stm32@...il.com>,
Linus Walleij <linus.walleij@...aro.org>,
Bartosz Golaszewski <brgl@...ev.pl>,
Sebastian Reichel <sre@...nel.org>,
Philipp Zabel <p.zabel@...gutronix.de>,
Marc Zyngier <maz@...nel.org>
Cc: linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-clk@...r.kernel.org,
linux-mtd@...ts.infradead.org, netdev@...r.kernel.org,
linux-stm32@...md-mailman.stormreply.com,
linux-gpio@...r.kernel.org, linux-pm@...r.kernel.org,
Neil Armstrong <neil.armstrong@...aro.org>
Subject: [PATCH RFC 11/20] net: stmmac: dwmac-oxnas: remove obsolete dwmac
glue driver
Due to lack of maintainance and stall of development for a few years now,
and since no new features will ever be added upstream, remove support
for OX810 and OX820 ethernet.
Signed-off-by: Neil Armstrong <neil.armstrong@...aro.org>
---
drivers/net/ethernet/stmicro/stmmac/Kconfig | 11 -
drivers/net/ethernet/stmicro/stmmac/Makefile | 1 -
drivers/net/ethernet/stmicro/stmmac/dwmac-oxnas.c | 245 ----------------------
3 files changed, 257 deletions(-)
diff --git a/drivers/net/ethernet/stmicro/stmmac/Kconfig b/drivers/net/ethernet/stmicro/stmmac/Kconfig
index f77511fe4e87..8a0655d5f22e 100644
--- a/drivers/net/ethernet/stmicro/stmmac/Kconfig
+++ b/drivers/net/ethernet/stmicro/stmmac/Kconfig
@@ -121,17 +121,6 @@ config DWMAC_MESON
the stmmac device driver. This driver is used for Meson6,
Meson8, Meson8b and GXBB SoCs.
-config DWMAC_OXNAS
- tristate "Oxford Semiconductor OXNAS dwmac support"
- default ARCH_OXNAS
- depends on OF && COMMON_CLK && (ARCH_OXNAS || COMPILE_TEST)
- select MFD_SYSCON
- help
- Support for Ethernet controller on Oxford Semiconductor OXNAS SoCs.
-
- This selects the Oxford Semiconductor OXNASSoC glue layer support for
- the stmmac device driver. This driver is used for OX820.
-
config DWMAC_QCOM_ETHQOS
tristate "Qualcomm ETHQOS support"
default ARCH_QCOM
diff --git a/drivers/net/ethernet/stmicro/stmmac/Makefile b/drivers/net/ethernet/stmicro/stmmac/Makefile
index 057e4bab5c08..9b56324ccf7d 100644
--- a/drivers/net/ethernet/stmicro/stmmac/Makefile
+++ b/drivers/net/ethernet/stmicro/stmmac/Makefile
@@ -19,7 +19,6 @@ obj-$(CONFIG_DWMAC_IPQ806X) += dwmac-ipq806x.o
obj-$(CONFIG_DWMAC_LPC18XX) += dwmac-lpc18xx.o
obj-$(CONFIG_DWMAC_MEDIATEK) += dwmac-mediatek.o
obj-$(CONFIG_DWMAC_MESON) += dwmac-meson.o dwmac-meson8b.o
-obj-$(CONFIG_DWMAC_OXNAS) += dwmac-oxnas.o
obj-$(CONFIG_DWMAC_QCOM_ETHQOS) += dwmac-qcom-ethqos.o
obj-$(CONFIG_DWMAC_ROCKCHIP) += dwmac-rk.o
obj-$(CONFIG_DWMAC_SOCFPGA) += dwmac-altr-socfpga.o
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-oxnas.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-oxnas.c
deleted file mode 100644
index 62a69a91ab22..000000000000
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-oxnas.c
+++ /dev/null
@@ -1,245 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Oxford Semiconductor OXNAS DWMAC glue layer
- *
- * Copyright (C) 2016 Neil Armstrong <narmstrong@...libre.com>
- * Copyright (C) 2014 Daniel Golle <daniel@...rotopia.org>
- * Copyright (C) 2013 Ma Haijun <mahaijuns@...il.com>
- * Copyright (C) 2012 John Crispin <blogic@...nwrt.org>
- */
-
-#include <linux/device.h>
-#include <linux/io.h>
-#include <linux/module.h>
-#include <linux/of.h>
-#include <linux/of_device.h>
-#include <linux/platform_device.h>
-#include <linux/regmap.h>
-#include <linux/mfd/syscon.h>
-#include <linux/stmmac.h>
-
-#include "stmmac_platform.h"
-
-/* System Control regmap offsets */
-#define OXNAS_DWMAC_CTRL_REGOFFSET 0x78
-#define OXNAS_DWMAC_DELAY_REGOFFSET 0x100
-
-/* Control Register */
-#define DWMAC_CKEN_RX_IN 14
-#define DWMAC_CKEN_RXN_OUT 13
-#define DWMAC_CKEN_RX_OUT 12
-#define DWMAC_CKEN_TX_IN 10
-#define DWMAC_CKEN_TXN_OUT 9
-#define DWMAC_CKEN_TX_OUT 8
-#define DWMAC_RX_SOURCE 7
-#define DWMAC_TX_SOURCE 6
-#define DWMAC_LOW_TX_SOURCE 4
-#define DWMAC_AUTO_TX_SOURCE 3
-#define DWMAC_RGMII 2
-#define DWMAC_SIMPLE_MUX 1
-#define DWMAC_CKEN_GTX 0
-
-/* Delay register */
-#define DWMAC_TX_VARDELAY_SHIFT 0
-#define DWMAC_TXN_VARDELAY_SHIFT 8
-#define DWMAC_RX_VARDELAY_SHIFT 16
-#define DWMAC_RXN_VARDELAY_SHIFT 24
-#define DWMAC_TX_VARDELAY(d) ((d) << DWMAC_TX_VARDELAY_SHIFT)
-#define DWMAC_TXN_VARDELAY(d) ((d) << DWMAC_TXN_VARDELAY_SHIFT)
-#define DWMAC_RX_VARDELAY(d) ((d) << DWMAC_RX_VARDELAY_SHIFT)
-#define DWMAC_RXN_VARDELAY(d) ((d) << DWMAC_RXN_VARDELAY_SHIFT)
-
-struct oxnas_dwmac;
-
-struct oxnas_dwmac_data {
- int (*setup)(struct oxnas_dwmac *dwmac);
-};
-
-struct oxnas_dwmac {
- struct device *dev;
- struct clk *clk;
- struct regmap *regmap;
- const struct oxnas_dwmac_data *data;
-};
-
-static int oxnas_dwmac_setup_ox810se(struct oxnas_dwmac *dwmac)
-{
- unsigned int value;
- int ret;
-
- ret = regmap_read(dwmac->regmap, OXNAS_DWMAC_CTRL_REGOFFSET, &value);
- if (ret < 0)
- return ret;
-
- /* Enable GMII_GTXCLK to follow GMII_REFCLK, required for gigabit PHY */
- value |= BIT(DWMAC_CKEN_GTX) |
- /* Use simple mux for 25/125 Mhz clock switching */
- BIT(DWMAC_SIMPLE_MUX);
-
- regmap_write(dwmac->regmap, OXNAS_DWMAC_CTRL_REGOFFSET, value);
-
- return 0;
-}
-
-static int oxnas_dwmac_setup_ox820(struct oxnas_dwmac *dwmac)
-{
- unsigned int value;
- int ret;
-
- ret = regmap_read(dwmac->regmap, OXNAS_DWMAC_CTRL_REGOFFSET, &value);
- if (ret < 0)
- return ret;
-
- /* Enable GMII_GTXCLK to follow GMII_REFCLK, required for gigabit PHY */
- value |= BIT(DWMAC_CKEN_GTX) |
- /* Use simple mux for 25/125 Mhz clock switching */
- BIT(DWMAC_SIMPLE_MUX) |
- /* set auto switch tx clock source */
- BIT(DWMAC_AUTO_TX_SOURCE) |
- /* enable tx & rx vardelay */
- BIT(DWMAC_CKEN_TX_OUT) |
- BIT(DWMAC_CKEN_TXN_OUT) |
- BIT(DWMAC_CKEN_TX_IN) |
- BIT(DWMAC_CKEN_RX_OUT) |
- BIT(DWMAC_CKEN_RXN_OUT) |
- BIT(DWMAC_CKEN_RX_IN);
- regmap_write(dwmac->regmap, OXNAS_DWMAC_CTRL_REGOFFSET, value);
-
- /* set tx & rx vardelay */
- value = DWMAC_TX_VARDELAY(4) |
- DWMAC_TXN_VARDELAY(2) |
- DWMAC_RX_VARDELAY(10) |
- DWMAC_RXN_VARDELAY(8);
- regmap_write(dwmac->regmap, OXNAS_DWMAC_DELAY_REGOFFSET, value);
-
- return 0;
-}
-
-static int oxnas_dwmac_init(struct platform_device *pdev, void *priv)
-{
- struct oxnas_dwmac *dwmac = priv;
- int ret;
-
- /* Reset HW here before changing the glue configuration */
- ret = device_reset(dwmac->dev);
- if (ret)
- return ret;
-
- ret = clk_prepare_enable(dwmac->clk);
- if (ret)
- return ret;
-
- ret = dwmac->data->setup(dwmac);
- if (ret)
- clk_disable_unprepare(dwmac->clk);
-
- return ret;
-}
-
-static void oxnas_dwmac_exit(struct platform_device *pdev, void *priv)
-{
- struct oxnas_dwmac *dwmac = priv;
-
- clk_disable_unprepare(dwmac->clk);
-}
-
-static int oxnas_dwmac_probe(struct platform_device *pdev)
-{
- struct plat_stmmacenet_data *plat_dat;
- struct stmmac_resources stmmac_res;
- struct oxnas_dwmac *dwmac;
- int ret;
-
- ret = stmmac_get_platform_resources(pdev, &stmmac_res);
- if (ret)
- return ret;
-
- plat_dat = stmmac_probe_config_dt(pdev, stmmac_res.mac);
- if (IS_ERR(plat_dat))
- return PTR_ERR(plat_dat);
-
- dwmac = devm_kzalloc(&pdev->dev, sizeof(*dwmac), GFP_KERNEL);
- if (!dwmac) {
- ret = -ENOMEM;
- goto err_remove_config_dt;
- }
-
- dwmac->data = (const struct oxnas_dwmac_data *)of_device_get_match_data(&pdev->dev);
- if (!dwmac->data) {
- ret = -EINVAL;
- goto err_remove_config_dt;
- }
-
- dwmac->dev = &pdev->dev;
- plat_dat->bsp_priv = dwmac;
- plat_dat->init = oxnas_dwmac_init;
- plat_dat->exit = oxnas_dwmac_exit;
-
- dwmac->regmap = syscon_regmap_lookup_by_phandle(pdev->dev.of_node,
- "oxsemi,sys-ctrl");
- if (IS_ERR(dwmac->regmap)) {
- dev_err(&pdev->dev, "failed to have sysctrl regmap\n");
- ret = PTR_ERR(dwmac->regmap);
- goto err_remove_config_dt;
- }
-
- dwmac->clk = devm_clk_get(&pdev->dev, "gmac");
- if (IS_ERR(dwmac->clk)) {
- ret = PTR_ERR(dwmac->clk);
- goto err_remove_config_dt;
- }
-
- ret = oxnas_dwmac_init(pdev, plat_dat->bsp_priv);
- if (ret)
- goto err_remove_config_dt;
-
- ret = stmmac_dvr_probe(&pdev->dev, plat_dat, &stmmac_res);
- if (ret)
- goto err_dwmac_exit;
-
-
- return 0;
-
-err_dwmac_exit:
- oxnas_dwmac_exit(pdev, plat_dat->bsp_priv);
-err_remove_config_dt:
- stmmac_remove_config_dt(pdev, plat_dat);
-
- return ret;
-}
-
-static const struct oxnas_dwmac_data ox810se_dwmac_data = {
- .setup = oxnas_dwmac_setup_ox810se,
-};
-
-static const struct oxnas_dwmac_data ox820_dwmac_data = {
- .setup = oxnas_dwmac_setup_ox820,
-};
-
-static const struct of_device_id oxnas_dwmac_match[] = {
- {
- .compatible = "oxsemi,ox810se-dwmac",
- .data = &ox810se_dwmac_data,
- },
- {
- .compatible = "oxsemi,ox820-dwmac",
- .data = &ox820_dwmac_data,
- },
- { }
-};
-MODULE_DEVICE_TABLE(of, oxnas_dwmac_match);
-
-static struct platform_driver oxnas_dwmac_driver = {
- .probe = oxnas_dwmac_probe,
- .remove = stmmac_pltfr_remove,
- .driver = {
- .name = "oxnas-dwmac",
- .pm = &stmmac_pltfr_pm_ops,
- .of_match_table = oxnas_dwmac_match,
- },
-};
-module_platform_driver(oxnas_dwmac_driver);
-
-MODULE_AUTHOR("Neil Armstrong <narmstrong@...libre.com>");
-MODULE_DESCRIPTION("Oxford Semiconductor OXNAS DWMAC glue layer");
-MODULE_LICENSE("GPL v2");
--
2.34.1
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