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