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798424e857
This adds a proper glue driver for the Designware DWMAC ethernet MAC IP found in the Amlogic Meson8, GXBB, GXL, GXM, G12A, G12B & SM1 SoCs. This is aimed to replace the static ethernet link setup found on the board init code for the Amlogic SoC based boards. Tested on a libretech-cc (S905x Internal RMII 10/100 PHY) and Khadas VIM3 (A113d with external 10/100/1000 RGMII PHY) to cover the most extreme setups. Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
150 lines
3.9 KiB
C
150 lines
3.9 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2021 BayLibre, SAS
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*/
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#include <common.h>
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#include <asm/io.h>
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#include <dm.h>
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#include <phy.h>
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#include "designware.h"
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#include <dm/device_compat.h>
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#include <linux/err.h>
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#define ETH_REG_0 0x0
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#define ETH_REG_1 0x4
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#define ETH_REG_2 0x18
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#define ETH_REG_3 0x1c
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#define GX_ETH_REG_0_PHY_INTF BIT(0)
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#define GX_ETH_REG_0_TX_PHASE(x) (((x) & 3) << 5)
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#define GX_ETH_REG_0_TX_RATIO(x) (((x) & 7) << 7)
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#define GX_ETH_REG_0_PHY_CLK_EN BIT(10)
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#define GX_ETH_REG_0_INVERT_RMII_CLK BIT(11)
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#define GX_ETH_REG_0_CLK_EN BIT(12)
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#define AXG_ETH_REG_0_PHY_INTF_RGMII BIT(0)
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#define AXG_ETH_REG_0_PHY_INTF_RMII BIT(2)
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#define AXG_ETH_REG_0_TX_PHASE(x) (((x) & 3) << 5)
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#define AXG_ETH_REG_0_TX_RATIO(x) (((x) & 7) << 7)
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#define AXG_ETH_REG_0_PHY_CLK_EN BIT(10)
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#define AXG_ETH_REG_0_INVERT_RMII_CLK BIT(11)
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#define AXG_ETH_REG_0_CLK_EN BIT(12)
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struct dwmac_meson8b_plat {
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struct dw_eth_pdata dw_eth_pdata;
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int (*dwmac_setup)(struct udevice *dev, struct eth_pdata *edata);
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void *regs;
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};
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static int dwmac_meson8b_of_to_plat(struct udevice *dev)
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{
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struct dwmac_meson8b_plat *pdata = dev_get_plat(dev);
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pdata->regs = (void *)dev_read_addr_index(dev, 1);
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if ((fdt_addr_t)pdata->regs == FDT_ADDR_T_NONE)
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return -EINVAL;
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pdata->dwmac_setup = (void *)dev_get_driver_data(dev);
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if (!pdata->dwmac_setup)
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return -EINVAL;
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return designware_eth_of_to_plat(dev);
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}
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static int dwmac_setup_axg(struct udevice *dev, struct eth_pdata *edata)
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{
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struct dwmac_meson8b_plat *plat = dev_get_plat(dev);
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switch (edata->phy_interface) {
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case PHY_INTERFACE_MODE_RGMII:
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case PHY_INTERFACE_MODE_RGMII_ID:
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case PHY_INTERFACE_MODE_RGMII_RXID:
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case PHY_INTERFACE_MODE_RGMII_TXID:
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/* Set RGMII mode */
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setbits_le32(plat->regs + ETH_REG_0, AXG_ETH_REG_0_PHY_INTF_RGMII |
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AXG_ETH_REG_0_TX_PHASE(1) |
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AXG_ETH_REG_0_TX_RATIO(4) |
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AXG_ETH_REG_0_PHY_CLK_EN |
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AXG_ETH_REG_0_CLK_EN);
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break;
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case PHY_INTERFACE_MODE_RMII:
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/* Set RMII mode */
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out_le32(plat->regs + ETH_REG_0, AXG_ETH_REG_0_PHY_INTF_RMII |
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AXG_ETH_REG_0_INVERT_RMII_CLK |
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AXG_ETH_REG_0_CLK_EN);
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break;
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default:
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dev_err(dev, "Unsupported PHY mode\n");
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return -EINVAL;
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}
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return 0;
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}
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static int dwmac_setup_gx(struct udevice *dev, struct eth_pdata *edata)
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{
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struct dwmac_meson8b_plat *plat = dev_get_plat(dev);
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switch (edata->phy_interface) {
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case PHY_INTERFACE_MODE_RGMII:
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case PHY_INTERFACE_MODE_RGMII_ID:
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case PHY_INTERFACE_MODE_RGMII_RXID:
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case PHY_INTERFACE_MODE_RGMII_TXID:
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/* Set RGMII mode */
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setbits_le32(plat->regs + ETH_REG_0, GX_ETH_REG_0_PHY_INTF |
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GX_ETH_REG_0_TX_PHASE(1) |
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GX_ETH_REG_0_TX_RATIO(4) |
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GX_ETH_REG_0_PHY_CLK_EN |
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GX_ETH_REG_0_CLK_EN);
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break;
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case PHY_INTERFACE_MODE_RMII:
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/* Set RMII mode */
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out_le32(plat->regs + ETH_REG_0, GX_ETH_REG_0_INVERT_RMII_CLK |
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GX_ETH_REG_0_CLK_EN);
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if (!IS_ENABLED(CONFIG_MESON_GXBB))
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writel(0x10110181, plat->regs + ETH_REG_2);
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break;
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default:
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dev_err(dev, "Unsupported PHY mode\n");
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return -EINVAL;
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}
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return 0;
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}
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static int dwmac_meson8b_probe(struct udevice *dev)
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{
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struct dwmac_meson8b_plat *pdata = dev_get_plat(dev);
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struct eth_pdata *edata = &pdata->dw_eth_pdata.eth_pdata;
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int ret;
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ret = pdata->dwmac_setup(dev, edata);
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if (ret)
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return ret;
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return designware_eth_probe(dev);
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}
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static const struct udevice_id dwmac_meson8b_ids[] = {
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{ .compatible = "amlogic,meson-gxbb-dwmac", .data = (ulong)dwmac_setup_gx },
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{ .compatible = "amlogic,meson-axg-dwmac", .data = (ulong)dwmac_setup_axg },
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{ }
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};
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U_BOOT_DRIVER(dwmac_meson8b) = {
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.name = "dwmac_meson8b",
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.id = UCLASS_ETH,
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.of_match = dwmac_meson8b_ids,
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.of_to_plat = dwmac_meson8b_of_to_plat,
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.probe = dwmac_meson8b_probe,
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.ops = &designware_eth_ops,
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.priv_auto = sizeof(struct dw_eth_dev),
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.plat_auto = sizeof(struct dwmac_meson8b_plat),
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.flags = DM_FLAG_ALLOC_PRIV_DMA,
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};
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