Adding upstream version 6.1.76.upstream/6.1.76

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 342 insertions, 0 deletions

diff --git a/drivers/net/ethernet/stmicro/stmmac/hwif.c b/drivers/net/ethernet/stmicro/stmmac/hwif.c
new file mode 100644
index 000000000..bb7114f97
--- /dev/null
+++ b/drivers/net/ethernet/stmicro/stmmac/hwif.c
@@ -0,0 +1,342 @@
+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+/*
+ * Copyright (c) 2018 Synopsys, Inc. and/or its affiliates.
+ * stmmac HW Interface Handling
+ */
+
+#include "common.h"
+#include "stmmac.h"
+#include "stmmac_ptp.h"
+
+static u32 stmmac_get_id(struct stmmac_priv *priv, u32 id_reg)
+{
+	u32 reg = readl(priv->ioaddr + id_reg);
+
+	if (!reg) {
+		dev_info(priv->device, "Version ID not available\n");
+		return 0x0;
+	}
+
+	dev_info(priv->device, "User ID: 0x%x, Synopsys ID: 0x%x\n",
+			(unsigned int)(reg & GENMASK(15, 8)) >> 8,
+			(unsigned int)(reg & GENMASK(7, 0)));
+	return reg & GENMASK(7, 0);
+}
+
+static u32 stmmac_get_dev_id(struct stmmac_priv *priv, u32 id_reg)
+{
+	u32 reg = readl(priv->ioaddr + id_reg);
+
+	if (!reg) {
+		dev_info(priv->device, "Version ID not available\n");
+		return 0x0;
+	}
+
+	return (reg & GENMASK(15, 8)) >> 8;
+}
+
+static void stmmac_dwmac_mode_quirk(struct stmmac_priv *priv)
+{
+	struct mac_device_info *mac = priv->hw;
+
+	if (priv->chain_mode) {
+		dev_info(priv->device, "Chain mode enabled\n");
+		priv->mode = STMMAC_CHAIN_MODE;
+		mac->mode = &chain_mode_ops;
+	} else {
+		dev_info(priv->device, "Ring mode enabled\n");
+		priv->mode = STMMAC_RING_MODE;
+		mac->mode = &ring_mode_ops;
+	}
+}
+
+static int stmmac_dwmac1_quirks(struct stmmac_priv *priv)
+{
+	struct mac_device_info *mac = priv->hw;
+
+	if (priv->plat->enh_desc) {
+		dev_info(priv->device, "Enhanced/Alternate descriptors\n");
+
+		/* GMAC older than 3.50 has no extended descriptors */
+		if (priv->synopsys_id >= DWMAC_CORE_3_50) {
+			dev_info(priv->device, "Enabled extended descriptors\n");
+			priv->extend_desc = 1;
+		} else {
+			dev_warn(priv->device, "Extended descriptors not supported\n");
+		}
+
+		mac->desc = &enh_desc_ops;
+	} else {
+		dev_info(priv->device, "Normal descriptors\n");
+		mac->desc = &ndesc_ops;
+	}
+
+	stmmac_dwmac_mode_quirk(priv);
+	return 0;
+}
+
+static int stmmac_dwmac4_quirks(struct stmmac_priv *priv)
+{
+	stmmac_dwmac_mode_quirk(priv);
+	return 0;
+}
+
+static int stmmac_dwxlgmac_quirks(struct stmmac_priv *priv)
+{
+	priv->hw->xlgmac = true;
+	return 0;
+}
+
+static const struct stmmac_hwif_entry {
+	bool gmac;
+	bool gmac4;
+	bool xgmac;
+	u32 min_id;
+	u32 dev_id;
+	const struct stmmac_regs_off regs;
+	const void *desc;
+	const void *dma;
+	const void *mac;
+	const void *hwtimestamp;
+	const void *mode;
+	const void *tc;
+	const void *mmc;
+	int (*setup)(struct stmmac_priv *priv);
+	int (*quirks)(struct stmmac_priv *priv);
+} stmmac_hw[] = {
+	/* NOTE: New HW versions shall go to the end of this table */
+	{
+		.gmac = false,
+		.gmac4 = false,
+		.xgmac = false,
+		.min_id = 0,
+		.regs = {
+			.ptp_off = PTP_GMAC3_X_OFFSET,
+			.mmc_off = MMC_GMAC3_X_OFFSET,
+		},
+		.desc = NULL,
+		.dma = &dwmac100_dma_ops,
+		.mac = &dwmac100_ops,
+		.hwtimestamp = &stmmac_ptp,
+		.mode = NULL,
+		.tc = NULL,
+		.mmc = &dwmac_mmc_ops,
+		.setup = dwmac100_setup,
+		.quirks = stmmac_dwmac1_quirks,
+	}, {
+		.gmac = true,
+		.gmac4 = false,
+		.xgmac = false,
+		.min_id = 0,
+		.regs = {
+			.ptp_off = PTP_GMAC3_X_OFFSET,
+			.mmc_off = MMC_GMAC3_X_OFFSET,
+		},
+		.desc = NULL,
+		.dma = &dwmac1000_dma_ops,
+		.mac = &dwmac1000_ops,
+		.hwtimestamp = &stmmac_ptp,
+		.mode = NULL,
+		.tc = NULL,
+		.mmc = &dwmac_mmc_ops,
+		.setup = dwmac1000_setup,
+		.quirks = stmmac_dwmac1_quirks,
+	}, {
+		.gmac = false,
+		.gmac4 = true,
+		.xgmac = false,
+		.min_id = 0,
+		.regs = {
+			.ptp_off = PTP_GMAC4_OFFSET,
+			.mmc_off = MMC_GMAC4_OFFSET,
+		},
+		.desc = &dwmac4_desc_ops,
+		.dma = &dwmac4_dma_ops,
+		.mac = &dwmac4_ops,
+		.hwtimestamp = &stmmac_ptp,
+		.mode = NULL,
+		.tc = &dwmac510_tc_ops,
+		.mmc = &dwmac_mmc_ops,
+		.setup = dwmac4_setup,
+		.quirks = stmmac_dwmac4_quirks,
+	}, {
+		.gmac = false,
+		.gmac4 = true,
+		.xgmac = false,
+		.min_id = DWMAC_CORE_4_00,
+		.regs = {
+			.ptp_off = PTP_GMAC4_OFFSET,
+			.mmc_off = MMC_GMAC4_OFFSET,
+		},
+		.desc = &dwmac4_desc_ops,
+		.dma = &dwmac4_dma_ops,
+		.mac = &dwmac410_ops,
+		.hwtimestamp = &stmmac_ptp,
+		.mode = &dwmac4_ring_mode_ops,
+		.tc = &dwmac510_tc_ops,
+		.mmc = &dwmac_mmc_ops,
+		.setup = dwmac4_setup,
+		.quirks = NULL,
+	}, {
+		.gmac = false,
+		.gmac4 = true,
+		.xgmac = false,
+		.min_id = DWMAC_CORE_4_10,
+		.regs = {
+			.ptp_off = PTP_GMAC4_OFFSET,
+			.mmc_off = MMC_GMAC4_OFFSET,
+		},
+		.desc = &dwmac4_desc_ops,
+		.dma = &dwmac410_dma_ops,
+		.mac = &dwmac410_ops,
+		.hwtimestamp = &stmmac_ptp,
+		.mode = &dwmac4_ring_mode_ops,
+		.tc = &dwmac510_tc_ops,
+		.mmc = &dwmac_mmc_ops,
+		.setup = dwmac4_setup,
+		.quirks = NULL,
+	}, {
+		.gmac = false,
+		.gmac4 = true,
+		.xgmac = false,
+		.min_id = DWMAC_CORE_5_10,
+		.regs = {
+			.ptp_off = PTP_GMAC4_OFFSET,
+			.mmc_off = MMC_GMAC4_OFFSET,
+		},
+		.desc = &dwmac4_desc_ops,
+		.dma = &dwmac410_dma_ops,
+		.mac = &dwmac510_ops,
+		.hwtimestamp = &stmmac_ptp,
+		.mode = &dwmac4_ring_mode_ops,
+		.tc = &dwmac510_tc_ops,
+		.mmc = &dwmac_mmc_ops,
+		.setup = dwmac4_setup,
+		.quirks = NULL,
+	}, {
+		.gmac = false,
+		.gmac4 = false,
+		.xgmac = true,
+		.min_id = DWXGMAC_CORE_2_10,
+		.dev_id = DWXGMAC_ID,
+		.regs = {
+			.ptp_off = PTP_XGMAC_OFFSET,
+			.mmc_off = MMC_XGMAC_OFFSET,
+		},
+		.desc = &dwxgmac210_desc_ops,
+		.dma = &dwxgmac210_dma_ops,
+		.mac = &dwxgmac210_ops,
+		.hwtimestamp = &stmmac_ptp,
+		.mode = NULL,
+		.tc = &dwmac510_tc_ops,
+		.mmc = &dwxgmac_mmc_ops,
+		.setup = dwxgmac2_setup,
+		.quirks = NULL,
+	}, {
+		.gmac = false,
+		.gmac4 = false,
+		.xgmac = true,
+		.min_id = DWXLGMAC_CORE_2_00,
+		.dev_id = DWXLGMAC_ID,
+		.regs = {
+			.ptp_off = PTP_XGMAC_OFFSET,
+			.mmc_off = MMC_XGMAC_OFFSET,
+		},
+		.desc = &dwxgmac210_desc_ops,
+		.dma = &dwxgmac210_dma_ops,
+		.mac = &dwxlgmac2_ops,
+		.hwtimestamp = &stmmac_ptp,
+		.mode = NULL,
+		.tc = &dwmac510_tc_ops,
+		.mmc = &dwxgmac_mmc_ops,
+		.setup = dwxlgmac2_setup,
+		.quirks = stmmac_dwxlgmac_quirks,
+	},
+};
+
+int stmmac_hwif_init(struct stmmac_priv *priv)
+{
+	bool needs_xgmac = priv->plat->has_xgmac;
+	bool needs_gmac4 = priv->plat->has_gmac4;
+	bool needs_gmac = priv->plat->has_gmac;
+	const struct stmmac_hwif_entry *entry;
+	struct mac_device_info *mac;
+	bool needs_setup = true;
+	u32 id, dev_id = 0;
+	int i, ret;
+
+	if (needs_gmac) {
+		id = stmmac_get_id(priv, GMAC_VERSION);
+	} else if (needs_gmac4 || needs_xgmac) {
+		id = stmmac_get_id(priv, GMAC4_VERSION);
+		if (needs_xgmac)
+			dev_id = stmmac_get_dev_id(priv, GMAC4_VERSION);
+	} else {
+		id = 0;
+	}
+
+	/* Save ID for later use */
+	priv->synopsys_id = id;
+
+	/* Lets assume some safe values first */
+	priv->ptpaddr = priv->ioaddr +
+		(needs_gmac4 ? PTP_GMAC4_OFFSET : PTP_GMAC3_X_OFFSET);
+	priv->mmcaddr = priv->ioaddr +
+		(needs_gmac4 ? MMC_GMAC4_OFFSET : MMC_GMAC3_X_OFFSET);
+
+	/* Check for HW specific setup first */
+	if (priv->plat->setup) {
+		mac = priv->plat->setup(priv);
+		needs_setup = false;
+	} else {
+		mac = devm_kzalloc(priv->device, sizeof(*mac), GFP_KERNEL);
+	}
+
+	if (!mac)
+		return -ENOMEM;
+
+	/* Fallback to generic HW */
+	for (i = ARRAY_SIZE(stmmac_hw) - 1; i >= 0; i--) {
+		entry = &stmmac_hw[i];
+
+		if (needs_gmac ^ entry->gmac)
+			continue;
+		if (needs_gmac4 ^ entry->gmac4)
+			continue;
+		if (needs_xgmac ^ entry->xgmac)
+			continue;
+		/* Use synopsys_id var because some setups can override this */
+		if (priv->synopsys_id < entry->min_id)
+			continue;
+		if (needs_xgmac && (dev_id ^ entry->dev_id))
+			continue;
+
+		/* Only use generic HW helpers if needed */
+		mac->desc = mac->desc ? : entry->desc;
+		mac->dma = mac->dma ? : entry->dma;
+		mac->mac = mac->mac ? : entry->mac;
+		mac->ptp = mac->ptp ? : entry->hwtimestamp;
+		mac->mode = mac->mode ? : entry->mode;
+		mac->tc = mac->tc ? : entry->tc;
+		mac->mmc = mac->mmc ? : entry->mmc;
+
+		priv->hw = mac;
+		priv->ptpaddr = priv->ioaddr + entry->regs.ptp_off;
+		priv->mmcaddr = priv->ioaddr + entry->regs.mmc_off;
+
+		/* Entry found */
+		if (needs_setup) {
+			ret = entry->setup(priv);
+			if (ret)
+				return ret;
+		}
+
+		/* Save quirks, if needed for posterior use */
+		priv->hwif_quirks = entry->quirks;
+		return 0;
+	}
+
+	dev_err(priv->device, "Failed to find HW IF (id=0x%x, gmac=%d/%d)\n",
+			id, needs_gmac, needs_gmac4);
+	return -EINVAL;
+}