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Merge branch 'riscv-spacemit-add-ethernet-support-for-k3'
Inochi Amaoto says: ==================== riscv: spacemit: Add ethernet support for K3 Add initial support for ethernet controller of the Spacemit K3 SoC. This ethernet controller is almost a standard Synopsys DesignWare MAC (version 5.40a). This controller require a syscon device to configure some basic features, like interface type and internal delay. ==================== Link: https://patch.msgid.link/20260316010041.164360-1-inochiama@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Jakub Kicinski
commit
1c0714c745
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@ -109,6 +109,7 @@ properties:
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- snps,dwmac-5.10a
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- snps,dwmac-5.20
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- snps,dwmac-5.30a
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- snps,dwmac-5.40a
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- snps,dwxgmac
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- snps,dwxgmac-2.10
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- sophgo,sg2042-dwmac
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@ -656,6 +657,7 @@ allOf:
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- snps,dwmac-5.10a
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- snps,dwmac-5.20
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- snps,dwmac-5.30a
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- snps,dwmac-5.40a
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- snps,dwxgmac
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- snps,dwxgmac-2.10
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- st,spear600-gmac
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102
Documentation/devicetree/bindings/net/spacemit,k3-dwmac.yaml
Normal file
102
Documentation/devicetree/bindings/net/spacemit,k3-dwmac.yaml
Normal file
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@ -0,0 +1,102 @@
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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/net/spacemit,k3-dwmac.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Spacemit K3 DWMAC glue layer
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maintainers:
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- Inochi Amaoto <inochiama@gmail.com>
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select:
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properties:
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compatible:
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contains:
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const: spacemit,k3-dwmac
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required:
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- compatible
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properties:
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compatible:
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items:
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- const: spacemit,k3-dwmac
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- const: snps,dwmac-5.40a
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reg:
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maxItems: 1
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clocks:
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items:
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- description: GMAC application clock
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- description: PTP clock
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- description: TX clock
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clock-names:
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items:
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- const: stmmaceth
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- const: ptp_ref
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- const: tx
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interrupts:
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minItems: 1
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items:
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- description: MAC interrupt
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- description: MAC wake interrupt
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interrupt-names:
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minItems: 1
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items:
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- const: macirq
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- const: eth_wake_irq
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resets:
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maxItems: 1
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reset-names:
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const: stmmaceth
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spacemit,apmu:
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$ref: /schemas/types.yaml#/definitions/phandle-array
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items:
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- items:
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- description: phandle to the syscon node which control the glue register
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- description: offset of the control register
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- description: offset of the dline register
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description:
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A phandle to syscon with offset to control registers for this MAC
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required:
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- compatible
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- reg
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- clocks
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- clock-names
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- interrupts
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- interrupt-names
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- resets
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- reset-names
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- spacemit,apmu
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allOf:
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- $ref: snps,dwmac.yaml#
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unevaluatedProperties: false
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examples:
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- |
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#include <dt-bindings/interrupt-controller/irq.h>
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ethernet@cac80000 {
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compatible = "spacemit,k3-dwmac", "snps,dwmac-5.40a";
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reg = <0xcac80000 0x2000>;
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clocks = <&syscon_apmu 66>, <&syscon_apmu 68>,
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<&syscon_apmu 69>;
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clock-names = "stmmaceth", "ptp_ref", "tx";
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interrupts = <131 IRQ_TYPE_LEVEL_HIGH>, <276 IRQ_TYPE_LEVEL_HIGH>;
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interrupt-names = "macirq", "eth_wake_irq";
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phy-mode = "rgmii-id";
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phy-handle = <&phy0>;
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resets = <&syscon_apmu 67>;
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reset-names = "stmmaceth";
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spacemit,apmu = <&syscon_apmu 0x384 0x38c>;
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};
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@ -24827,6 +24827,12 @@ W: https://linuxtv.org
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Q: http://patchwork.linuxtv.org/project/linux-media/list/
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F: drivers/media/dvb-frontends/sp2*
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SPACEMIT DWMAC GLUE LAYER
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M: Inochi Amaoto <inochiama@gmail.com>
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S: Maintained
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F: Documentation/devicetree/bindings/net/spacemit,k3-dwmac.yaml
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F: drivers/net/ethernet/stmicro/stmmac/dwmac-spacemit.c
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SPACEMIT K1 I2C DRIVER
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M: Troy Mitchell <troy.mitchell@linux.spacemit.com>
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S: Maintained
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@ -216,6 +216,18 @@ config DWMAC_SOPHGO
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for the stmmac device driver. This driver is used for the
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ethernet controllers on various Sophgo SoCs.
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config DWMAC_SPACEMIT
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tristate "Spacemit dwmac support"
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depends on OF && (ARCH_SPACEMIT || COMPILE_TEST)
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select MFD_SYSCON
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default m if ARCH_SPACEMIT
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help
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Support for ethernet controllers on Spacemit RISC-V SoCs
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This selects the Spacemit platform specific glue layer support
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for the stmmac device driver. This driver is used for the
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Spacemit K3 ethernet controllers.
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config DWMAC_STARFIVE
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tristate "StarFive dwmac support"
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depends on OF && (ARCH_STARFIVE || COMPILE_TEST)
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@ -27,6 +27,7 @@ obj-$(CONFIG_DWMAC_RZN1) += dwmac-rzn1.o
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obj-$(CONFIG_DWMAC_S32) += dwmac-s32.o
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obj-$(CONFIG_DWMAC_SOCFPGA) += dwmac-altr-socfpga.o
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obj-$(CONFIG_DWMAC_SOPHGO) += dwmac-sophgo.o
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obj-$(CONFIG_DWMAC_SPACEMIT) += dwmac-spacemit.o
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obj-$(CONFIG_DWMAC_STARFIVE) += dwmac-starfive.o
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obj-$(CONFIG_DWMAC_STI) += dwmac-sti.o
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obj-$(CONFIG_DWMAC_STM32) += dwmac-stm32.o
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227
drivers/net/ethernet/stmicro/stmmac/dwmac-spacemit.c
Normal file
227
drivers/net/ethernet/stmicro/stmmac/dwmac-spacemit.c
Normal file
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@ -0,0 +1,227 @@
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// SPDX-License-Identifier: GPL-2.0+
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/*
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* Spacemit DWMAC platform driver
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*
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* Copyright (C) 2026 Inochi Amaoto <inochiama@gmail.com>
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*/
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#include <linux/clk.h>
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#include <linux/math.h>
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#include <linux/mod_devicetable.h>
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#include <linux/module.h>
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#include <linux/mfd/syscon.h>
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#include <linux/of.h>
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#include <linux/platform_device.h>
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#include <linux/property.h>
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#include <linux/regmap.h>
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#include "stmmac_platform.h"
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/* ctrl register bits */
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#define CTRL_PHY_INTF_RGMII BIT(3)
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#define CTRL_PHY_INTF_MII BIT(4)
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#define CTRL_WAKE_IRQ_EN BIT(9)
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#define CTRL_PHY_IRQ_EN BIT(12)
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/* dline register bits */
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#define RGMII_RX_DLINE_EN BIT(0)
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#define RGMII_RX_DLINE_STEP GENMASK(5, 4)
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#define RGMII_RX_DLINE_CODE GENMASK(15, 8)
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#define RGMII_TX_DLINE_EN BIT(16)
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#define RGMII_TX_DLINE_STEP GENMASK(21, 20)
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#define RGMII_TX_DLINE_CODE GENMASK(31, 24)
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#define MAX_DLINE_DELAY_CODE 0xff
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#define MAX_WORKED_DELAY 2800
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/* Note: the delay step value is at 0.1ps */
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#define K3_DELAY_STEP 367
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struct spacmit_dwmac {
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struct regmap *apmu;
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unsigned int ctrl_offset;
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unsigned int dline_offset;
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};
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static int spacemit_dwmac_set_delay(struct spacmit_dwmac *dwmac,
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unsigned int tx_code, unsigned int rx_code)
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{
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unsigned int mask, val;
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mask = RGMII_TX_DLINE_STEP | RGMII_TX_DLINE_CODE | RGMII_TX_DLINE_EN |
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RGMII_RX_DLINE_STEP | RGMII_RX_DLINE_CODE | RGMII_RX_DLINE_EN;
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/*
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* Since the delay step provided by config 0 is small enough, and
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* it can cover the range of the valid delay, so there is no needed
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* to use other step config.
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*/
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val = FIELD_PREP(RGMII_TX_DLINE_STEP, 0) |
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FIELD_PREP(RGMII_TX_DLINE_CODE, tx_code) | RGMII_TX_DLINE_EN |
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FIELD_PREP(RGMII_RX_DLINE_STEP, 0) |
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FIELD_PREP(RGMII_RX_DLINE_CODE, rx_code) | RGMII_RX_DLINE_EN;
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return regmap_update_bits(dwmac->apmu, dwmac->dline_offset,
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mask, val);
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}
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static int spacemit_dwmac_detected_delay_value(unsigned int delay)
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{
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if (delay == 0)
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return 0;
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if (delay > MAX_WORKED_DELAY)
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return -EINVAL;
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/*
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* Note K3 require a specific factor for calculate
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* the delay, in this scenario it is 0.9. So the
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* formula is code * step / 10 * 0.9
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*/
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return DIV_ROUND_CLOSEST(delay * 10 * 10, K3_DELAY_STEP * 9);
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}
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static int spacemit_dwmac_fix_delay(struct spacmit_dwmac *dwmac,
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unsigned int tx_delay,
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unsigned int rx_delay)
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{
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int rx_code;
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int tx_code;
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rx_code = spacemit_dwmac_detected_delay_value(rx_delay);
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if (rx_code < 0)
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return rx_code;
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tx_code = spacemit_dwmac_detected_delay_value(tx_delay);
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if (tx_code < 0)
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return tx_code;
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return spacemit_dwmac_set_delay(dwmac, tx_code, rx_code);
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}
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static int spacemit_dwmac_update_irq_config(struct spacmit_dwmac *dwmac,
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struct stmmac_resources *stmmac_res)
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{
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unsigned int val = stmmac_res->wol_irq >= 0 ? CTRL_WAKE_IRQ_EN : 0;
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unsigned int mask = CTRL_WAKE_IRQ_EN;
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return regmap_update_bits(dwmac->apmu, dwmac->ctrl_offset,
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mask, val);
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}
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static void spacemit_get_interfaces(struct stmmac_priv *priv, void *bsp_priv,
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unsigned long *interfaces)
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{
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__set_bit(PHY_INTERFACE_MODE_MII, interfaces);
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__set_bit(PHY_INTERFACE_MODE_RMII, interfaces);
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phy_interface_set_rgmii(interfaces);
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}
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static int spacemit_set_phy_intf_sel(void *bsp_priv, u8 phy_intf_sel)
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{
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unsigned int mask = CTRL_PHY_INTF_MII | CTRL_PHY_INTF_RGMII;
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struct spacmit_dwmac *dwmac = bsp_priv;
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unsigned int val = 0;
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switch (phy_intf_sel) {
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case PHY_INTF_SEL_GMII_MII:
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val = CTRL_PHY_INTF_MII;
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break;
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case PHY_INTF_SEL_RMII:
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break;
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case PHY_INTF_SEL_RGMII:
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val = CTRL_PHY_INTF_RGMII;
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break;
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default:
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return -EINVAL;
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}
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return regmap_update_bits(dwmac->apmu, dwmac->ctrl_offset,
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mask, val);
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}
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static int spacemit_dwmac_probe(struct platform_device *pdev)
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{
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struct plat_stmmacenet_data *plat_dat;
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struct stmmac_resources stmmac_res;
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struct device *dev = &pdev->dev;
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struct spacmit_dwmac *dwmac;
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unsigned int offset[2];
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struct regmap *apmu;
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struct clk *clk_tx;
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u32 rx_delay = 0;
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u32 tx_delay = 0;
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int ret;
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ret = stmmac_get_platform_resources(pdev, &stmmac_res);
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if (ret)
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return dev_err_probe(dev, ret,
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"failed to get platform resources\n");
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dwmac = devm_kzalloc(&pdev->dev, sizeof(*dwmac), GFP_KERNEL);
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if (!dwmac)
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return -ENOMEM;
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plat_dat = devm_stmmac_probe_config_dt(pdev, stmmac_res.mac);
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if (IS_ERR(plat_dat))
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return dev_err_probe(dev, PTR_ERR(plat_dat),
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"failed to parse DT parameters\n");
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clk_tx = devm_clk_get_enabled(&pdev->dev, "tx");
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if (IS_ERR(clk_tx))
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return dev_err_probe(&pdev->dev, PTR_ERR(clk_tx),
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"failed to get tx clock\n");
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apmu = syscon_regmap_lookup_by_phandle_args(pdev->dev.of_node,
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"spacemit,apmu", 2,
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offset);
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if (IS_ERR(apmu))
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return dev_err_probe(dev, PTR_ERR(apmu),
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"Failed to get apmu regmap\n");
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dwmac->apmu = apmu;
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dwmac->ctrl_offset = offset[0];
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dwmac->dline_offset = offset[1];
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ret = spacemit_dwmac_update_irq_config(dwmac, &stmmac_res);
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if (ret)
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return dev_err_probe(dev, ret, "Failed to configure irq config\n");
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of_property_read_u32(pdev->dev.of_node, "tx-internal-delay-ps",
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&tx_delay);
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of_property_read_u32(pdev->dev.of_node, "rx-internal-delay-ps",
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&rx_delay);
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plat_dat->get_interfaces = spacemit_get_interfaces;
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plat_dat->set_phy_intf_sel = spacemit_set_phy_intf_sel;
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plat_dat->bsp_priv = dwmac;
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ret = spacemit_dwmac_fix_delay(dwmac, tx_delay, rx_delay);
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if (ret)
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return dev_err_probe(dev, ret, "Failed to configure delay\n");
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return stmmac_dvr_probe(dev, plat_dat, &stmmac_res);
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}
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static const struct of_device_id spacemit_dwmac_match[] = {
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{ .compatible = "spacemit,k3-dwmac" },
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{ /* sentinel */ }
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};
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MODULE_DEVICE_TABLE(of, spacemit_dwmac_match);
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static struct platform_driver spacemit_dwmac_driver = {
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.probe = spacemit_dwmac_probe,
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.remove = stmmac_pltfr_remove,
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.driver = {
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.name = "spacemit-dwmac",
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.pm = &stmmac_pltfr_pm_ops,
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.of_match_table = spacemit_dwmac_match,
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},
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};
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module_platform_driver(spacemit_dwmac_driver);
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MODULE_AUTHOR("Inochi Amaoto <inochiama@gmail.com>");
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MODULE_DESCRIPTION("Spacemit DWMAC platform driver");
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MODULE_LICENSE("GPL");
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@ -403,6 +403,7 @@ static const char * const stmmac_gmac4_compats[] = {
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"snps,dwmac-5.10a",
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"snps,dwmac-5.20",
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"snps,dwmac-5.30a",
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"snps,dwmac-5.40a",
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NULL
|
||||
};
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||||
|
|
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