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From: asheplyakov@yandex.ru
To: devel@lists.altlinux.org
Cc: Alexey Sheplyakov <asheplyakov@basealt.ru>,
	Dmitry Dunaev <dmitry.dunaev@baikalelectronics.ru>,
	Alexey Sheplyakov <asheplyakov@altlinux.org>,
	Evgeny Sinelnikov <sin@basealt.ru>,
	Vitaly Chikunov <vt@altlinux.org>, Igor Chudov <nir@basealt.ru>
Subject: [devel] [PATCH 03/35] net: stmmac: custom mdio reset for some Baikal-M boards
Date: Fri, 20 May 2022 20:28:17 +0400
Message-ID: <20220520162849.1554351-4-asheplyakov@yandex.ru> (raw)
In-Reply-To: <20220520162849.1554351-1-asheplyakov@yandex.ru>

From: Alexey Sheplyakov <asheplyakov@altlinux.org>

Signed-off-by: Alexey Sheplyakov <asheplyakov@basealt.ru>
Signed-off-by: Dmitry Dunaev <dmitry.dunaev@baikalelectronics.ru>
X-feature-Baikal-M
---
 .../net/ethernet/stmicro/stmmac/stmmac_mdio.c | 63 +++++++++++++++++++
 1 file changed, 63 insertions(+)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c
index a5d150c5f3d8..639bcc35e928 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c
@@ -346,6 +346,63 @@ static int stmmac_mdio_write(struct mii_bus *bus, int phyaddr, int phyreg,
 	return ret;
 }
 
+#define MAC_GPIO 0xe0 /* GPIO register */
+#define MAC_GPIO_GPO BIT(8)  /* output port */
+
+#if IS_ENABLED(CONFIG_STMMAC_PLATFORM) && IS_ENABLED(CONFIG_OF)
+/**
+ * Reset the MII bus via MAC GP_OUT pin
+ */
+static int stmmac_mdio_reset_gp_out(struct stmmac_priv *priv) {
+	u32 value, high, low;
+	u32 delays[3] = { 0, 0, 0 };
+	bool active_low = false;
+	struct device_node *np = priv->device->of_node;
+
+	if (!np)
+		return -ENODEV;
+
+	if (!of_property_read_bool(np, "snps,reset-gp-out")) {
+		dev_warn(priv->device, "snps,reset-gp-out is not set\n");
+		return -ENODEV;
+	}
+
+	dev_info(priv->device, "resetting MDIO via GP_OUT\n");
+	active_low = of_property_read_bool(np, "snsps,reset-active-low");
+	of_property_read_u32_array(np, "snps,reset-delays-us", delays, 3);
+
+	value = readl(priv->ioaddr + MAC_GPIO);
+	if (active_low) {
+		high = value | MAC_GPIO_GPO;
+		low = value & ~MAC_GPIO_GPO;
+	} else {
+		high = value & ~MAC_GPIO_GPO;
+		low = value | MAC_GPIO_GPO;
+	}
+
+	writel(high, priv->ioaddr + MAC_GPIO);
+	if (delays[0])
+		msleep(DIV_ROUND_UP(delays[0], 1000));
+
+	writel(low, priv->ioaddr + MAC_GPIO);
+	if (delays[1])
+		msleep(DIV_ROUND_UP(delays[1], 1000));
+
+	writel(high, priv->ioaddr + MAC_GPIO);
+	if (delays[2])
+		msleep(DIV_ROUND_UP(delays[2], 1000));
+
+	/* Clear PHY reset */
+	udelay(10);
+	value = readl(priv->ioaddr + MAC_GPIO);
+	value |= MAC_GPIO_GPO;
+	writel(value, priv->ioaddr + MAC_GPIO);
+	msleep(1000);
+	dev_info(priv->device, "mdio reset completed\n");
+	return 0;
+}
+#endif
+
 /**
  * stmmac_mdio_reset
  * @bus: points to the mii_bus structure
@@ -361,8 +418,14 @@ int stmmac_mdio_reset(struct mii_bus *bus)
 #ifdef CONFIG_OF
 	if (priv->device->of_node) {
 		struct gpio_desc *reset_gpio;
+		bool reset_gp_out;
 		u32 delays[3] = { 0, 0, 0 };
 
+		reset_gp_out = of_property_read_bool(priv->device->of_node,
+						     "snps,reset-gp-out");
+		if (reset_gp_out)
+			return stmmac_mdio_reset_gp_out(priv);
+
 		reset_gpio = devm_gpiod_get_optional(priv->device,
 						     "snps,reset",
 						     GPIOD_OUT_LOW);
-- 
2.32.0



  parent reply	other threads:[~2022-05-20 16:28 UTC|newest]

Thread overview: 45+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-05-20 16:28 [devel] kernel-image-un-def: Baikal-M asheplyakov
2022-05-20 16:28 ` [devel] [PATCH 01/35] net: stmmac: inital support of Baikal-T1/M SoCs GMAC asheplyakov
2022-05-20 16:28 ` [devel] [PATCH 02/35] dt-bindings: dwmac: Add bindings for Baikal-T1/M SoCs asheplyakov
2022-05-20 16:28 ` asheplyakov [this message]
2022-05-20 16:28 ` [devel] [PATCH 04/35] net: dwmac-baikal: added compatible strings asheplyakov
2022-05-20 16:28 ` [devel] [PATCH 05/35] hwmon: bt1-pvt: access registers via pvt_{readl, writel} helpers asheplyakov
2022-05-20 16:28 ` [devel] [PATCH 06/35] hwmon: bt1-pvt: define pvt_readl/pvt_writel for Baikal-M SoC asheplyakov
2022-05-20 16:28 ` [devel] [PATCH 07/35] hwmon: bt1-pvt: adjusted probing " asheplyakov
2022-05-20 16:28 ` [devel] [PATCH 08/35] hwmon: bt1-pvt: added compatible baikal,pvt asheplyakov
2022-05-20 16:28 ` [devel] [PATCH 09/35] clk: added Baikal-M clock management unit driver asheplyakov
2022-05-20 16:28 ` [devel] [PATCH 10/35] cpufreq-dt: don't load on Baikal-M SoC asheplyakov
2022-05-20 16:28 ` [devel] [PATCH 11/35] usb: dwc3: of-simple: added compatible string for " asheplyakov
2022-05-20 16:28 ` [devel] [PATCH 12/35] arm64: Enable armv8 based Baikal-M SoC support asheplyakov
2022-05-20 16:28 ` [devel] [PATCH 13/35] drm: new bridge driver - stdp4028 asheplyakov
2022-05-20 16:28 ` [devel] [PATCH 14/35] drm: added Baikal-M SoC video display unit driver asheplyakov
2022-05-20 16:28 ` [devel] [PATCH 15/35] dw-hdmi-ahb-audio: support Baikal-M SoC asheplyakov
2022-05-20 16:28 ` [devel] [PATCH 16/35] Added TF307/TF306 board management controller driver asheplyakov
2022-05-20 16:28 ` [devel] [PATCH 17/35] ALSA: hda: Baikal-M support asheplyakov
2022-05-20 16:28 ` [devel] [PATCH 18/35] [rejected] serial: 8250_dw: verify clock rate in dw8250_set_termios asheplyakov
2022-05-20 16:53   ` Andy Shevchenko
2022-05-20 16:28 ` [devel] [PATCH 19/35] drm/panfrost: forcibly set dma-coherent on Baikal-M asheplyakov
2022-05-20 16:28 ` [devel] [PATCH 20/35] drm/panfrost: disable devfreq " asheplyakov
2022-05-20 16:28 ` [devel] [PATCH 21/35] pm: disable all sleep states on Baikal-M based boards asheplyakov
2022-05-20 16:28 ` [devel] [PATCH 22/35] arm64-stub: fixed secondary cores boot on Baikal-M SoC asheplyakov
2022-05-20 16:28 ` [devel] [PATCH 23/35] efi-rtc: avoid calling efi.get_time " asheplyakov
2022-05-20 16:28 ` [devel] [PATCH 24/35] net: fwnode_get_phy_id: consider all compatible strings asheplyakov
2022-05-20 16:28 ` [devel] [PATCH 25/35] (BROKEN) dwc-i2s: support Baikal-M SoC asheplyakov
2022-05-20 16:28 ` [devel] [PATCH 26/35] input: added TF307 serio PS/2 emulator driver asheplyakov
2022-05-20 16:28 ` [devel] [PATCH 27/35] arm64: added Baikal-M SoC and TF307 board device tree asheplyakov
2022-05-20 16:28 ` [devel] [PATCH 28/35] arm64: device tree: baikal: mark GPU as dma-coherent asheplyakov
2022-05-20 16:28 ` [devel] [PATCH 29/35] arm64: device tree: Baikal-M: fixed PHY binding description asheplyakov
2022-05-20 16:28 ` [devel] [PATCH 30/35] arm64: device tree: Baikal-M: fixed gpio alias asheplyakov
2022-05-20 16:28 ` [devel] [PATCH 31/35] arm64: device tree: Baikal-M: fixed GPU opp_table asheplyakov
2022-05-20 16:28 ` [devel] [PATCH 32/35] arm64: device tree: Baikal-M: fixed CPUs opp_table asheplyakov
2022-05-20 16:28 ` [devel] [PATCH 33/35] arm64: defconfig for Baikal-M support testing asheplyakov
2022-05-20 16:28 ` [devel] [PATCH 34/35] config-aarch64: enable more Baikal-M related drivers asheplyakov
2022-05-20 16:28 ` [devel] [PATCH 35/35] 1:5.17.9-alt2 asheplyakov
2022-05-21  4:04   ` P X
2022-05-21 16:50     ` Alexey Sheplyakov
2022-05-21 16:55       ` [devel] devel-kernel@ Антон Мидюков
2022-05-22  5:51       ` [devel] [PATCH 35/35] 1:5.17.9-alt2 Dmitry V. Levin
2022-05-23  8:51         ` Alexey Sheplyakov
2022-05-23  9:58           ` Dmitry V. Levin
2022-05-23 11:21           ` Alexey Gladkov
2022-05-23  9:47   ` [devel] Baikal-M patches for et101, aqbm1000, tf307 Evgeny Sinelnikov

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