From c6eec6f332a0504ba3af1d597e7624b9dfd7cfda Mon Sep 17 00:00:00 2001 From: Alexandre TORGUE Date: Mon, 29 Aug 2016 18:23:38 +0200 Subject: [PATCH 1/3] net: ethernet: dwmac: add Ethernet glue logic for stm32 chip stm324xx family chips support Synopsys MAC 3.510 IP. This patch adds settings for logical glue logic: -clocks -mode selection MII or RMII. Reviewed-by: Joachim Eastwood Acked-by: Giuseppe Cavallaro Tested-by: Maxime Coquelin Signed-off-by: Alexandre TORGUE Signed-off-by: David S. Miller --- drivers/net/ethernet/stmicro/stmmac/Kconfig | 12 ++ drivers/net/ethernet/stmicro/stmmac/Makefile | 1 + .../net/ethernet/stmicro/stmmac/dwmac-stm32.c | 193 ++++++++++++++++++ 3 files changed, 206 insertions(+) create mode 100644 drivers/net/ethernet/stmicro/stmmac/dwmac-stm32.c diff --git a/drivers/net/ethernet/stmicro/stmmac/Kconfig b/drivers/net/ethernet/stmicro/stmmac/Kconfig index 8f06a6621ab1..c732b8ce2528 100644 --- a/drivers/net/ethernet/stmicro/stmmac/Kconfig +++ b/drivers/net/ethernet/stmicro/stmmac/Kconfig @@ -104,6 +104,18 @@ config DWMAC_STI device driver. This driver is used on for the STi series SOCs GMAC ethernet controller. +config DWMAC_STM32 + tristate "STM32 DWMAC support" + default ARCH_STM32 + depends on OF && HAS_IOMEM + select MFD_SYSCON + ---help--- + Support for ethernet controller on STM32 SOCs. + + This selects STM32 SoC glue layer support for the stmmac + device driver. This driver is used on for the STM32 series + SOCs GMAC ethernet controller. + config DWMAC_SUNXI tristate "Allwinner GMAC support" default ARCH_SUNXI diff --git a/drivers/net/ethernet/stmicro/stmmac/Makefile b/drivers/net/ethernet/stmicro/stmmac/Makefile index 44b630cd1755..f0c9396fa28e 100644 --- a/drivers/net/ethernet/stmicro/stmmac/Makefile +++ b/drivers/net/ethernet/stmicro/stmmac/Makefile @@ -13,6 +13,7 @@ obj-$(CONFIG_DWMAC_MESON) += dwmac-meson.o obj-$(CONFIG_DWMAC_ROCKCHIP) += dwmac-rk.o obj-$(CONFIG_DWMAC_SOCFPGA) += dwmac-altr-socfpga.o obj-$(CONFIG_DWMAC_STI) += dwmac-sti.o +obj-$(CONFIG_DWMAC_STM32) += dwmac-stm32.o obj-$(CONFIG_DWMAC_SUNXI) += dwmac-sunxi.o obj-$(CONFIG_DWMAC_GENERIC) += dwmac-generic.o stmmac-platform-objs:= stmmac_platform.o diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-stm32.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-stm32.c new file mode 100644 index 000000000000..79d8b926f17c --- /dev/null +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-stm32.c @@ -0,0 +1,193 @@ +/* + * dwmac-stm32.c - DWMAC Specific Glue layer for STM32 MCU + * + * Copyright (C) Alexandre Torgue 2015 + * Author: Alexandre Torgue + * License terms: GNU General Public License (GPL), version 2 + * + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "stmmac_platform.h" + +#define MII_PHY_SEL_MASK BIT(23) + +struct stm32_dwmac { + struct clk *clk_tx; + struct clk *clk_rx; + u32 mode_reg; /* MAC glue-logic mode register */ + struct regmap *regmap; + u32 speed; +}; + +static int stm32_dwmac_init(struct plat_stmmacenet_data *plat_dat) +{ + struct stm32_dwmac *dwmac = plat_dat->bsp_priv; + u32 reg = dwmac->mode_reg; + u32 val; + int ret; + + val = (plat_dat->interface == PHY_INTERFACE_MODE_MII) ? 0 : 1; + ret = regmap_update_bits(dwmac->regmap, reg, MII_PHY_SEL_MASK, val); + if (ret) + return ret; + + ret = clk_prepare_enable(dwmac->clk_tx); + if (ret) + return ret; + + ret = clk_prepare_enable(dwmac->clk_rx); + if (ret) + clk_disable_unprepare(dwmac->clk_tx); + + return ret; +} + +static void stm32_dwmac_clk_disable(struct stm32_dwmac *dwmac) +{ + clk_disable_unprepare(dwmac->clk_tx); + clk_disable_unprepare(dwmac->clk_rx); +} + +static int stm32_dwmac_parse_data(struct stm32_dwmac *dwmac, + struct device *dev) +{ + struct device_node *np = dev->of_node; + int err; + + /* Get TX/RX clocks */ + dwmac->clk_tx = devm_clk_get(dev, "mac-clk-tx"); + if (IS_ERR(dwmac->clk_tx)) { + dev_err(dev, "No tx clock provided...\n"); + return PTR_ERR(dwmac->clk_tx); + } + dwmac->clk_rx = devm_clk_get(dev, "mac-clk-rx"); + if (IS_ERR(dwmac->clk_rx)) { + dev_err(dev, "No rx clock provided...\n"); + return PTR_ERR(dwmac->clk_rx); + } + + /* Get mode register */ + dwmac->regmap = syscon_regmap_lookup_by_phandle(np, "st,syscon"); + if (IS_ERR(dwmac->regmap)) + return PTR_ERR(dwmac->regmap); + + err = of_property_read_u32_index(np, "st,syscon", 1, &dwmac->mode_reg); + if (err) + dev_err(dev, "Can't get sysconfig mode offset (%d)\n", err); + + return err; +} + +static int stm32_dwmac_probe(struct platform_device *pdev) +{ + struct plat_stmmacenet_data *plat_dat; + struct stmmac_resources stmmac_res; + struct stm32_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) + return -ENOMEM; + + ret = stm32_dwmac_parse_data(dwmac, &pdev->dev); + if (ret) { + dev_err(&pdev->dev, "Unable to parse OF data\n"); + return ret; + } + + plat_dat->bsp_priv = dwmac; + + ret = stm32_dwmac_init(plat_dat); + if (ret) + return ret; + + ret = stmmac_dvr_probe(&pdev->dev, plat_dat, &stmmac_res); + if (ret) + stm32_dwmac_clk_disable(dwmac); + + return ret; +} + +static int stm32_dwmac_remove(struct platform_device *pdev) +{ + struct net_device *ndev = platform_get_drvdata(pdev); + struct stmmac_priv *priv = netdev_priv(ndev); + int ret = stmmac_dvr_remove(&pdev->dev); + + stm32_dwmac_clk_disable(priv->plat->bsp_priv); + + return ret; +} + +#ifdef CONFIG_PM_SLEEP +static int stm32_dwmac_suspend(struct device *dev) +{ + struct net_device *ndev = dev_get_drvdata(dev); + struct stmmac_priv *priv = netdev_priv(ndev); + int ret; + + ret = stmmac_suspend(dev); + stm32_dwmac_clk_disable(priv->plat->bsp_priv); + + return ret; +} + +static int stm32_dwmac_resume(struct device *dev) +{ + struct net_device *ndev = dev_get_drvdata(dev); + struct stmmac_priv *priv = netdev_priv(ndev); + int ret; + + ret = stm32_dwmac_init(priv->plat); + if (ret) + return ret; + + ret = stmmac_resume(dev); + + return ret; +} +#endif /* CONFIG_PM_SLEEP */ + +SIMPLE_DEV_PM_OPS(stm32_dwmac_pm_ops, stm32_dwmac_suspend, stm32_dwmac_resume); + +static const struct of_device_id stm32_dwmac_match[] = { + { .compatible = "st,stm32-dwmac"}, + { } +}; +MODULE_DEVICE_TABLE(of, stm32_dwmac_match); + +static struct platform_driver stm32_dwmac_driver = { + .probe = stm32_dwmac_probe, + .remove = stm32_dwmac_remove, + .driver = { + .name = "stm32-dwmac", + .pm = &stm32_dwmac_pm_ops, + .of_match_table = stm32_dwmac_match, + }, +}; +module_platform_driver(stm32_dwmac_driver); + +MODULE_AUTHOR("Alexandre Torgue "); +MODULE_DESCRIPTION("STMicroelectronics MCU DWMAC Specific Glue layer"); +MODULE_LICENSE("GPL v2"); From 99abf9d6641e7857df67faa2ff7e4044cdea9683 Mon Sep 17 00:00:00 2001 From: Alexandre TORGUE Date: Mon, 29 Aug 2016 18:23:39 +0200 Subject: [PATCH 2/3] Documentation: Bindings: Add STM32 DWMAC glue Acked-by: Rob Herring Signed-off-by: Alexandre TORGUE Signed-off-by: David S. Miller --- .../devicetree/bindings/net/stm32-dwmac.txt | 32 +++++++++++++++++++ 1 file changed, 32 insertions(+) create mode 100644 Documentation/devicetree/bindings/net/stm32-dwmac.txt diff --git a/Documentation/devicetree/bindings/net/stm32-dwmac.txt b/Documentation/devicetree/bindings/net/stm32-dwmac.txt new file mode 100644 index 000000000000..c35afb7e956a --- /dev/null +++ b/Documentation/devicetree/bindings/net/stm32-dwmac.txt @@ -0,0 +1,32 @@ +STMicroelectronics STM32 / MCU DWMAC glue layer controller + +This file documents platform glue layer for stmmac. +Please see stmmac.txt for the other unchanged properties. + +The device node has following properties. + +Required properties: +- compatible: Should be "st,stm32-dwmac" to select glue, and + "snps,dwmac-3.50a" to select IP version. +- clocks: Must contain a phandle for each entry in clock-names. +- clock-names: Should be "stmmaceth" for the host clock. + Should be "mac-clk-tx" for the MAC TX clock. + Should be "mac-clk-rx" for the MAC RX clock. +- st,syscon : Should be phandle/offset pair. The phandle to the syscon node which + encompases the glue register, and the offset of the control register. +Example: + + ethernet@40028000 { + compatible = "st,stm32-dwmac", "snps,dwmac-3.50a"; + status = "disabled"; + reg = <0x40028000 0x8000>; + reg-names = "stmmaceth"; + interrupts = <0 61 0>, <0 62 0>; + interrupt-names = "macirq", "eth_wake_irq"; + clock-names = "stmmaceth", "mac-clk-tx", "mac-clk-rx"; + clocks = <&rcc 0 25>, <&rcc 0 26>, <&rcc 0 27>; + st,syscon = <&syscfg 0x4>; + snps,pbl = <8>; + snps,mixed-burst; + dma-ranges; + }; From f9a09687a87887d1330dd5e5d08d9d7b3d209fb2 Mon Sep 17 00:00:00 2001 From: Alexandre TORGUE Date: Mon, 29 Aug 2016 18:23:40 +0200 Subject: [PATCH 3/3] net: ethernet: stmmac: add support of Synopsys 3.50a MAC IP Adds support of Synopsys 3.50a MAC IP in stmmac driver. Acked-by: Giuseppe Cavallaro Tested-by: Maxime Coquelin Signed-off-by: Alexandre TORGUE Signed-off-by: David S. Miller --- drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c index 756bb548e81a..0a0d6a86f397 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c @@ -265,6 +265,7 @@ stmmac_probe_config_dt(struct platform_device *pdev, const char **mac) * once needed on other platforms. */ if (of_device_is_compatible(np, "st,spear600-gmac") || + of_device_is_compatible(np, "snps,dwmac-3.50a") || of_device_is_compatible(np, "snps,dwmac-3.70a") || of_device_is_compatible(np, "snps,dwmac")) { /* Note that the max-frame-size parameter as defined in the