From patchwork Fri Feb 3 12:25:42 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Horatiu Vultur X-Patchwork-Id: 13127423 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 25285C05027 for ; Fri, 3 Feb 2023 12:28:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231748AbjBCM2W (ORCPT ); Fri, 3 Feb 2023 07:28:22 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37632 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230230AbjBCM2V (ORCPT ); Fri, 3 Feb 2023 07:28:21 -0500 Received: from esa.microchip.iphmx.com (esa.microchip.iphmx.com [68.232.154.123]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id ACCD323119; Fri, 3 Feb 2023 04:28:16 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1675427297; x=1706963297; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=nz4w3CPGREhfTa6UeZUQRnb6oNcR1/rCcFKtf5NCm48=; b=1xmsjWTEFQtFtZ2iUGJRoCh5kz+f5vGwLrZUhhEI6vCUyXz6GGikOQFP ywYvTU9oSlIGz/pgbiyMrzxdbj+N+gtX+J72w+KOiW1BQzsxPfrIhaYxr waZ1JSR58LwBb6QGfUVFNIBSbG2SjEwC6cO85fNfg1jCpY/HXr2awigUp nPGwIeredMKbcch90z0RONP3l4VXPv0QaqdGTQQS+UREn6WdSaCq2gewY n+JE8UVcO5lUmo1z0LloOMtnb+T2FoyqwiCEqAwv/auMtaRaaQUtBZGqa OpjmUT/R1bylLcQQRv1Cx6LQAy0sX+8d5gIfBNzOeOITcK6CYFRztOwRd Q==; X-IronPort-AV: E=Sophos;i="5.97,270,1669100400"; d="scan'208";a="135424185" Received: from unknown (HELO email.microchip.com) ([170.129.1.10]) by esa6.microchip.iphmx.com with ESMTP/TLS/AES256-SHA256; 03 Feb 2023 05:28:15 -0700 Received: from chn-vm-ex02.mchp-main.com (10.10.87.72) by chn-vm-ex02.mchp-main.com (10.10.87.72) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.16; Fri, 3 Feb 2023 05:28:15 -0700 Received: from soft-dev3-1.microsemi.net (10.10.115.15) by chn-vm-ex02.mchp-main.com (10.10.85.144) with Microsoft SMTP Server id 15.1.2507.16 via Frontend Transport; Fri, 3 Feb 2023 05:28:13 -0700 From: Horatiu Vultur To: , CC: , , , , , , , , Horatiu Vultur Subject: [PATCH net-next v2] net: micrel: Add support for lan8841 PHY Date: Fri, 3 Feb 2023 13:25:42 +0100 Message-ID: <20230203122542.436305-1-horatiu.vultur@microchip.com> X-Mailer: git-send-email 2.38.0 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org The LAN8841 is completely integrated triple-speed (10BASE-T/ 100BASE-TX/ 1000BASE-T) Ethernet physical layer transceivers for transmission and reception of data on standard CAT-5, as well as CAT-5e and CAT-6, unshielded twisted pair (UTP) cables. The LAN8841 offers the industry-standard GMII/MII as well as the RGMII. Some of the features of the PHY are: - Wake on LAN - Auto-MDIX - IEEE 1588-2008 (V2) - LinkMD Capable diagnosis Currently the patch offers support only for link configuration. Signed-off-by: Horatiu Vultur --- v1->v2: - Remove hardcoded values - Fix typo in commit message --- drivers/net/phy/micrel.c | 227 +++++++++++++++++++++++++++++++++++-- include/linux/micrel_phy.h | 1 + 2 files changed, 219 insertions(+), 9 deletions(-) diff --git a/drivers/net/phy/micrel.c b/drivers/net/phy/micrel.c index d5b80c31ab91c..53c37ac66c343 100644 --- a/drivers/net/phy/micrel.c +++ b/drivers/net/phy/micrel.c @@ -26,6 +26,7 @@ #include #include #include +#include #include #include #include @@ -268,6 +269,9 @@ struct kszphy_type { u16 interrupt_level_mask; u16 cable_diag_reg; unsigned long pair_mask; + u16 disable_dll_tx_bit; + u16 disable_dll_rx_bit; + u16 disable_dll_mask; bool has_broadcast_disable; bool has_nand_tree_disable; bool has_rmii_ref_clk_sel; @@ -364,6 +368,19 @@ static const struct kszphy_type ksz9021_type = { .interrupt_level_mask = BIT(14), }; +static const struct kszphy_type ksz9131_type = { + .interrupt_level_mask = BIT(14), + .disable_dll_tx_bit = BIT(12), + .disable_dll_rx_bit = BIT(12), + .disable_dll_mask = BIT_MASK(12), +}; + +static const struct kszphy_type lan8841_type = { + .disable_dll_tx_bit = BIT(14), + .disable_dll_rx_bit = BIT(14), + .disable_dll_mask = BIT_MASK(14), +}; + static int kszphy_extended_write(struct phy_device *phydev, u32 regnum, u16 val) { @@ -1172,19 +1189,18 @@ static int ksz9131_of_load_skew_values(struct phy_device *phydev, #define KSZ9131RN_MMD_COMMON_CTRL_REG 2 #define KSZ9131RN_RXC_DLL_CTRL 76 #define KSZ9131RN_TXC_DLL_CTRL 77 -#define KSZ9131RN_DLL_CTRL_BYPASS BIT_MASK(12) #define KSZ9131RN_DLL_ENABLE_DELAY 0 -#define KSZ9131RN_DLL_DISABLE_DELAY BIT(12) static int ksz9131_config_rgmii_delay(struct phy_device *phydev) { + const struct kszphy_type *type = phydev->drv->driver_data; u16 rxcdll_val, txcdll_val; int ret; switch (phydev->interface) { case PHY_INTERFACE_MODE_RGMII: - rxcdll_val = KSZ9131RN_DLL_DISABLE_DELAY; - txcdll_val = KSZ9131RN_DLL_DISABLE_DELAY; + rxcdll_val = type->disable_dll_rx_bit; + txcdll_val = type->disable_dll_tx_bit; break; case PHY_INTERFACE_MODE_RGMII_ID: rxcdll_val = KSZ9131RN_DLL_ENABLE_DELAY; @@ -1192,10 +1208,10 @@ static int ksz9131_config_rgmii_delay(struct phy_device *phydev) break; case PHY_INTERFACE_MODE_RGMII_RXID: rxcdll_val = KSZ9131RN_DLL_ENABLE_DELAY; - txcdll_val = KSZ9131RN_DLL_DISABLE_DELAY; + txcdll_val = type->disable_dll_tx_bit; break; case PHY_INTERFACE_MODE_RGMII_TXID: - rxcdll_val = KSZ9131RN_DLL_DISABLE_DELAY; + rxcdll_val = type->disable_dll_rx_bit; txcdll_val = KSZ9131RN_DLL_ENABLE_DELAY; break; default: @@ -1203,13 +1219,13 @@ static int ksz9131_config_rgmii_delay(struct phy_device *phydev) } ret = phy_modify_mmd(phydev, KSZ9131RN_MMD_COMMON_CTRL_REG, - KSZ9131RN_RXC_DLL_CTRL, KSZ9131RN_DLL_CTRL_BYPASS, + KSZ9131RN_RXC_DLL_CTRL, type->disable_dll_mask, rxcdll_val); if (ret < 0) return ret; return phy_modify_mmd(phydev, KSZ9131RN_MMD_COMMON_CTRL_REG, - KSZ9131RN_TXC_DLL_CTRL, KSZ9131RN_DLL_CTRL_BYPASS, + KSZ9131RN_TXC_DLL_CTRL, type->disable_dll_mask, txcdll_val); } @@ -3152,6 +3168,183 @@ static int lan8814_probe(struct phy_device *phydev) return 0; } +#define LAN8841_MMD_TIMER_REG 0 +#define LAN8841_MMD0_REGISTER_17 17 +#define LAN8841_MMD0_REGISTER_17_DROP_OPT(x) ((x) & 0x3) +#define LAN8841_MMD0_REGISTER_17_XMIT_TOG_TX_DIS BIT(3) +#define LAN8841_OPERATION_MODE_STRAP_OVERRIDE_LOW_REG 2 +#define LAN8841_OPERATION_MODE_STRAP_OVERRIDE_LOW_REG_MAGJACK BIT(14) +#define LAN8841_MMD_ANALOG_REG 28 +#define LAN8841_ANALOG_CONTROL_1 1 +#define LAN8841_ANALOG_CONTROL_1_PLL_TRIM(x) (((x) & 0x3) << 5) +#define LAN8841_ANALOG_CONTROL_10 13 +#define LAN8841_ANALOG_CONTROL_10_PLL_DIV(x) ((x) & 0x3) +#define LAN8841_ANALOG_CONTROL_11 14 +#define LAN8841_ANALOG_CONTROL_11_LDO_REF(x) (((x) & 0x7) << 12) +#define LAN8841_TX_LOW_I_CH_C_D_POWER_MANAGMENT 69 +#define LAN8841_TX_LOW_I_CH_C_D_POWER_MANAGMENT_VAL 0xbffc +#define LAN8841_BTRX_POWER_DOWN 70 +#define LAN8841_BTRX_POWER_DOWN_QBIAS_CH_A BIT(0) +#define LAN8841_BTRX_POWER_DOWN_BTRX_CH_A BIT(1) +#define LAN8841_BTRX_POWER_DOWN_QBIAS_CH_B BIT(2) +#define LAN8841_BTRX_POWER_DOWN_BTRX_CH_B BIT(3) +#define LAN8841_BTRX_POWER_DOWN_BTRX_CH_C BIT(5) +#define LAN8841_BTRX_POWER_DOWN_BTRX_CH_D BIT(7) +#define LAN8841_ADC_CHANNEL_MASK 198 +static int lan8841_config_init(struct phy_device *phydev) +{ + char *rx_data_skews[4] = {"rxd0-skew-psec", "rxd1-skew-psec", + "rxd2-skew-psec", "rxd3-skew-psec"}; + char *tx_data_skews[4] = {"txd0-skew-psec", "txd1-skew-psec", + "txd2-skew-psec", "txd3-skew-psec"}; + char *clk_skews[2] = {"rxc-skew-psec", "txc-skew-psec"}; + struct device_node *of_node; + int ret; + + if (phy_interface_is_rgmii(phydev)) { + ret = ksz9131_config_rgmii_delay(phydev); + if (ret < 0) + return ret; + } + + of_node = phydev->mdio.dev.of_node; + if (!of_node) + goto hw_init; + + ret = ksz9131_of_load_skew_values(phydev, of_node, + MII_KSZ9031RN_CLK_PAD_SKEW, 5, + clk_skews, 2); + if (ret < 0) + return ret; + + ret = ksz9131_of_load_skew_values(phydev, of_node, + MII_KSZ9031RN_RX_DATA_PAD_SKEW, 4, + rx_data_skews, 4); + if (ret < 0) + return ret; + + ret = ksz9131_of_load_skew_values(phydev, of_node, + MII_KSZ9031RN_TX_DATA_PAD_SKEW, 4, + tx_data_skews, 4); + if (ret < 0) + return ret; + +hw_init: + /* 100BT Clause 40 improvenent errata */ + phy_write_mmd(phydev, LAN8841_MMD_ANALOG_REG, + LAN8841_ANALOG_CONTROL_1, + LAN8841_ANALOG_CONTROL_1_PLL_TRIM(0x2)); + phy_write_mmd(phydev, LAN8841_MMD_ANALOG_REG, + LAN8841_ANALOG_CONTROL_10, + LAN8841_ANALOG_CONTROL_10_PLL_DIV(0x1)); + + /* 10M/100M Ethernet Signal Tuning Errata for Shorted-Center Tap + * Magnetics + */ + ret = phy_read_mmd(phydev, KSZ9131RN_MMD_COMMON_CTRL_REG, + LAN8841_OPERATION_MODE_STRAP_OVERRIDE_LOW_REG); + if (ret & LAN8841_OPERATION_MODE_STRAP_OVERRIDE_LOW_REG_MAGJACK) { + phy_write_mmd(phydev, LAN8841_MMD_ANALOG_REG, + LAN8841_TX_LOW_I_CH_C_D_POWER_MANAGMENT, + LAN8841_TX_LOW_I_CH_C_D_POWER_MANAGMENT_VAL); + phy_write_mmd(phydev, LAN8841_MMD_ANALOG_REG, + LAN8841_BTRX_POWER_DOWN, + LAN8841_BTRX_POWER_DOWN_QBIAS_CH_A | + LAN8841_BTRX_POWER_DOWN_BTRX_CH_A | + LAN8841_BTRX_POWER_DOWN_QBIAS_CH_B | + LAN8841_BTRX_POWER_DOWN_BTRX_CH_B | + LAN8841_BTRX_POWER_DOWN_BTRX_CH_C | + LAN8841_BTRX_POWER_DOWN_BTRX_CH_D); + } + + /* LDO Adjustment errata */ + phy_write_mmd(phydev, LAN8841_MMD_ANALOG_REG, + LAN8841_ANALOG_CONTROL_11, + LAN8841_ANALOG_CONTROL_11_LDO_REF(1)); + + /* 100BT RGMII latency tuning errata */ + phy_write_mmd(phydev, MDIO_MMD_PMAPMD, + LAN8841_ADC_CHANNEL_MASK, 0x0); + phy_write_mmd(phydev, LAN8841_MMD_TIMER_REG, + LAN8841_MMD0_REGISTER_17, + LAN8841_MMD0_REGISTER_17_DROP_OPT(2) | + LAN8841_MMD0_REGISTER_17_XMIT_TOG_TX_DIS); + + return 0; +} + +#define LAN8841_OUTPUT_CTRL 25 +#define LAN8841_OUTPUT_CTRL_INT_BUFFER BIT(14) +#define LAN8841_CTRL 31 +#define LAN8841_CTRL_INTR_POLARITY BIT(14) +static int lan8841_config_intr(struct phy_device *phydev) +{ + struct irq_data *irq_data; + int temp = 0; + + irq_data = irq_get_irq_data(phydev->irq); + if (!irq_data) + return 0; + + if (irqd_get_trigger_type(irq_data) & IRQ_TYPE_LEVEL_HIGH) { + /* Change polarity of the interrupt */ + phy_modify(phydev, LAN8841_OUTPUT_CTRL, + LAN8841_OUTPUT_CTRL_INT_BUFFER, + LAN8841_OUTPUT_CTRL_INT_BUFFER); + phy_modify(phydev, LAN8841_CTRL, + LAN8841_CTRL_INTR_POLARITY, + LAN8841_CTRL_INTR_POLARITY); + } else { + /* It is enough to set INT buffer to open-drain because then + * the interrupt will be active low. + */ + phy_modify(phydev, LAN8841_OUTPUT_CTRL, + LAN8841_OUTPUT_CTRL_INT_BUFFER, 0); + } + + /* enable / disable interrupts */ + if (phydev->interrupts == PHY_INTERRUPT_ENABLED) + temp = LAN8814_INT_LINK; + + return phy_write(phydev, LAN8814_INTC, temp); +} + +static irqreturn_t lan8841_handle_interrupt(struct phy_device *phydev) +{ + int irq_status; + + irq_status = phy_read(phydev, LAN8814_INTS); + if (irq_status < 0) { + phy_error(phydev); + return IRQ_NONE; + } + + if (irq_status & LAN8814_INT_LINK) { + phy_trigger_machine(phydev); + return IRQ_HANDLED; + } + + return IRQ_NONE; +} + +#define LAN8841_OPERATION_MODE_STRAP_LOW_REGISTER 3 +#define LAN8841_OPERATION_MODE_STRAP_LOW_REGISTER_STRAP_RGMII_EN BIT(0) +static int lan8841_probe(struct phy_device *phydev) +{ + int err; + + err = kszphy_probe(phydev); + if (err) + return err; + + if (phy_read_mmd(phydev, KSZ9131RN_MMD_COMMON_CTRL_REG, + LAN8841_OPERATION_MODE_STRAP_LOW_REGISTER) & + LAN8841_OPERATION_MODE_STRAP_LOW_REGISTER_STRAP_RGMII_EN) + phydev->interface = PHY_INTERFACE_MODE_RGMII_RXID; + + return 0; +} + static struct phy_driver ksphy_driver[] = { { .phy_id = PHY_ID_KS8737, @@ -3361,13 +3554,28 @@ static struct phy_driver ksphy_driver[] = { .resume = kszphy_resume, .config_intr = lan8804_config_intr, .handle_interrupt = lan8804_handle_interrupt, +}, { + .phy_id = PHY_ID_LAN8841, + .phy_id_mask = MICREL_PHY_ID_MASK, + .name = "Microchip LAN8841 Gigabit PHY", + .driver_data = &lan8841_type, + .config_init = lan8841_config_init, + .probe = lan8841_probe, + .soft_reset = genphy_soft_reset, + .config_intr = lan8841_config_intr, + .handle_interrupt = lan8841_handle_interrupt, + .get_sset_count = kszphy_get_sset_count, + .get_strings = kszphy_get_strings, + .get_stats = kszphy_get_stats, + .suspend = genphy_suspend, + .resume = genphy_resume, }, { .phy_id = PHY_ID_KSZ9131, .phy_id_mask = MICREL_PHY_ID_MASK, .name = "Microchip KSZ9131 Gigabit PHY", /* PHY_GBIT_FEATURES */ .flags = PHY_POLL_CABLE_TEST, - .driver_data = &ksz9021_type, + .driver_data = &ksz9131_type, .probe = kszphy_probe, .config_init = ksz9131_config_init, .config_intr = kszphy_config_intr, @@ -3446,6 +3654,7 @@ static struct mdio_device_id __maybe_unused micrel_tbl[] = { { PHY_ID_KSZ886X, MICREL_PHY_ID_MASK }, { PHY_ID_LAN8814, MICREL_PHY_ID_MASK }, { PHY_ID_LAN8804, MICREL_PHY_ID_MASK }, + { PHY_ID_LAN8841, MICREL_PHY_ID_MASK }, { } }; diff --git a/include/linux/micrel_phy.h b/include/linux/micrel_phy.h index 771e050883db7..8bef1ab62bba3 100644 --- a/include/linux/micrel_phy.h +++ b/include/linux/micrel_phy.h @@ -31,6 +31,7 @@ #define PHY_ID_KSZ9131 0x00221640 #define PHY_ID_LAN8814 0x00221660 #define PHY_ID_LAN8804 0x00221670 +#define PHY_ID_LAN8841 0x00221650 #define PHY_ID_KSZ886X 0x00221430 #define PHY_ID_KSZ8863 0x00221435