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// 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"
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 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 const struct stmmac_hwif_entry {
bool gmac;
bool gmac4;
u32 min_id;
const void *desc;
const void *dma;
const void *mac;
const void *hwtimestamp;
const void *mode;
const void *tc;
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,
.min_id = 0,
.desc = NULL,
.dma = &dwmac100_dma_ops,
.mac = &dwmac100_ops,
.hwtimestamp = &stmmac_ptp,
.mode = NULL,
.tc = NULL,
.setup = dwmac100_setup,
.quirks = stmmac_dwmac1_quirks,
}, {
.gmac = true,
.gmac4 = false,
.min_id = 0,
.desc = NULL,
.dma = &dwmac1000_dma_ops,
.mac = &dwmac1000_ops,
.hwtimestamp = &stmmac_ptp,
.mode = NULL,
.tc = NULL,
.setup = dwmac1000_setup,
.quirks = stmmac_dwmac1_quirks,
}, {
.gmac = false,
.gmac4 = true,
.min_id = 0,
.desc = &dwmac4_desc_ops,
.dma = &dwmac4_dma_ops,
.mac = &dwmac4_ops,
.hwtimestamp = &stmmac_ptp,
.mode = NULL,
.tc = NULL,
.setup = dwmac4_setup,
.quirks = stmmac_dwmac4_quirks,
}, {
.gmac = false,
.gmac4 = true,
.min_id = DWMAC_CORE_4_00,
.desc = &dwmac4_desc_ops,
.dma = &dwmac4_dma_ops,
.mac = &dwmac410_ops,
.hwtimestamp = &stmmac_ptp,
.mode = &dwmac4_ring_mode_ops,
.tc = NULL,
.setup = dwmac4_setup,
.quirks = NULL,
}, {
.gmac = false,
.gmac4 = true,
.min_id = DWMAC_CORE_4_10,
.desc = &dwmac4_desc_ops,
.dma = &dwmac410_dma_ops,
.mac = &dwmac410_ops,
.hwtimestamp = &stmmac_ptp,
.mode = &dwmac4_ring_mode_ops,
.tc = NULL,
.setup = dwmac4_setup,
.quirks = NULL,
}, {
.gmac = false,
.gmac4 = true,
.min_id = DWMAC_CORE_5_10,
.desc = &dwmac4_desc_ops,
.dma = &dwmac410_dma_ops,
.mac = &dwmac510_ops,
.hwtimestamp = &stmmac_ptp,
.mode = &dwmac4_ring_mode_ops,
.tc = &dwmac510_tc_ops,
.setup = dwmac4_setup,
.quirks = NULL,
}
};
int stmmac_hwif_init(struct stmmac_priv *priv)
{
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;
int i, ret;
u32 id;
if (needs_gmac) {
id = stmmac_get_id(priv, GMAC_VERSION);
} else {
id = stmmac_get_id(priv, GMAC4_VERSION);
}
/* Save ID for later use */
priv->synopsys_id = id;
/* Check for HW specific setup first */
if (priv->plat->setup) {
priv->hw = priv->plat->setup(priv);
if (!priv->hw)
return -ENOMEM;
return 0;
}
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 (id < entry->min_id)
continue;
mac->desc = entry->desc;
mac->dma = entry->dma;
mac->mac = entry->mac;
mac->ptp = entry->hwtimestamp;
mac->mode = entry->mode;
mac->tc = entry->tc;
priv->hw = mac;
/* Entry found */
ret = entry->setup(priv);
if (ret)
return ret;
/* Run quirks, if needed */
if (entry->quirks) {
ret = entry->quirks(priv);
if (ret)
return ret;
}
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;
}
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