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// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2020, Loongson Corporation
*/
#include <linux/clk-provider.h>
#include <linux/pci.h>
#include <linux/dmi.h>
#include <linux/device.h>
#include <linux/of_irq.h>
#include "stmmac.h"
static int loongson_default_data(struct plat_stmmacenet_data *plat)
{
plat->clk_csr = 2; /* clk_csr_i = 20-35MHz & MDC = clk_csr_i/16 */
plat->has_gmac = 1;
plat->force_sf_dma_mode = 1;
/* Set default value for multicast hash bins */
plat->multicast_filter_bins = HASH_TABLE_SIZE;
/* Set default value for unicast filter entries */
plat->unicast_filter_entries = 1;
/* Set the maxmtu to a default of JUMBO_LEN */
plat->maxmtu = JUMBO_LEN;
/* Set default number of RX and TX queues to use */
plat->tx_queues_to_use = 1;
plat->rx_queues_to_use = 1;
/* Disable Priority config by default */
plat->tx_queues_cfg[0].use_prio = false;
plat->rx_queues_cfg[0].use_prio = false;
/* Disable RX queues routing by default */
plat->rx_queues_cfg[0].pkt_route = 0x0;
/* Default to phy auto-detection */
plat->phy_addr = -1;
plat->dma_cfg->pbl = 32;
plat->dma_cfg->pblx8 = true;
plat->multicast_filter_bins = 256;
return 0;
}
static int loongson_dwmac_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
struct plat_stmmacenet_data *plat;
struct stmmac_resources res;
struct device_node *np;
int ret, i, phy_mode;
bool mdio = false;
np = dev_of_node(&pdev->dev);
if (!np) {
pr_info("dwmac_loongson_pci: No OF node\n");
return -ENODEV;
}
if (!of_device_is_compatible(np, "loongson, pci-gmac")) {
pr_info("dwmac_loongson_pci: Incompatible OF node\n");
return -ENODEV;
}
plat = devm_kzalloc(&pdev->dev, sizeof(*plat), GFP_KERNEL);
if (!plat)
return -ENOMEM;
if (plat->mdio_node) {
dev_err(&pdev->dev, "Found MDIO subnode\n");
mdio = true;
}
if (mdio) {
plat->mdio_bus_data = devm_kzalloc(&pdev->dev,
sizeof(*plat->mdio_bus_data),
GFP_KERNEL);
if (!plat->mdio_bus_data)
return -ENOMEM;
plat->mdio_bus_data->needs_reset = true;
}
plat->dma_cfg = devm_kzalloc(&pdev->dev, sizeof(*plat->dma_cfg), GFP_KERNEL);
if (!plat->dma_cfg)
return -ENOMEM;
/* Enable pci device */
ret = pci_enable_device(pdev);
if (ret) {
dev_err(&pdev->dev, "%s: ERROR: failed to enable device\n", __func__);
return ret;
}
/* Get the base address of device */
for (i = 0; i < PCI_STD_NUM_BARS; i++) {
if (pci_resource_len(pdev, i) == 0)
continue;
ret = pcim_iomap_regions(pdev, BIT(0), pci_name(pdev));
if (ret)
return ret;
break;
}
plat->bus_id = of_alias_get_id(np, "ethernet");
if (plat->bus_id < 0)
plat->bus_id = pci_dev_id(pdev);
phy_mode = device_get_phy_mode(&pdev->dev);
if (phy_mode < 0) {
dev_err(&pdev->dev, "phy_mode not found\n");
return phy_mode;
}
plat->phy_interface = phy_mode;
plat->interface = PHY_INTERFACE_MODE_GMII;
pci_set_master(pdev);
loongson_default_data(plat);
pci_enable_msi(pdev);
memset(&res, 0, sizeof(res));
res.addr = pcim_iomap_table(pdev)[0];
res.irq = of_irq_get_byname(np, "macirq");
if (res.irq < 0) {
dev_err(&pdev->dev, "IRQ macirq not found\n");
ret = -ENODEV;
}
res.wol_irq = of_irq_get_byname(np, "eth_wake_irq");
if (res.wol_irq < 0) {
dev_info(&pdev->dev, "IRQ eth_wake_irq not found, using macirq\n");
res.wol_irq = res.irq;
}
res.lpi_irq = of_irq_get_byname(np, "eth_lpi");
if (res.lpi_irq < 0) {
dev_err(&pdev->dev, "IRQ eth_lpi not found\n");
ret = -ENODEV;
}
return stmmac_dvr_probe(&pdev->dev, plat, &res);
}
static void loongson_dwmac_remove(struct pci_dev *pdev)
{
int i;
stmmac_dvr_remove(&pdev->dev);
for (i = 0; i < PCI_STD_NUM_BARS; i++) {
if (pci_resource_len(pdev, i) == 0)
continue;
pcim_iounmap_regions(pdev, BIT(i));
break;
}
pci_disable_device(pdev);
}
static int __maybe_unused loongson_dwmac_suspend(struct device *dev)
{
struct pci_dev *pdev = to_pci_dev(dev);
int ret;
ret = stmmac_suspend(dev);
if (ret)
return ret;
ret = pci_save_state(pdev);
if (ret)
return ret;
pci_disable_device(pdev);
pci_wake_from_d3(pdev, true);
return 0;
}
static int __maybe_unused loongson_dwmac_resume(struct device *dev)
{
struct pci_dev *pdev = to_pci_dev(dev);
int ret;
pci_restore_state(pdev);
pci_set_power_state(pdev, PCI_D0);
ret = pci_enable_device(pdev);
if (ret)
return ret;
pci_set_master(pdev);
return stmmac_resume(dev);
}
static SIMPLE_DEV_PM_OPS(loongson_dwmac_pm_ops, loongson_dwmac_suspend,
loongson_dwmac_resume);
static const struct pci_device_id loongson_dwmac_id_table[] = {
{ PCI_VDEVICE(LOONGSON, 0x7a03) },
{}
};
MODULE_DEVICE_TABLE(pci, loongson_dwmac_id_table);
static struct pci_driver loongson_dwmac_driver = {
.name = "dwmac-loongson-pci",
.id_table = loongson_dwmac_id_table,
.probe = loongson_dwmac_probe,
.remove = loongson_dwmac_remove,
.driver = {
.pm = &loongson_dwmac_pm_ops,
},
};
module_pci_driver(loongson_dwmac_driver);
MODULE_DESCRIPTION("Loongson DWMAC PCI driver");
MODULE_AUTHOR("Qing Zhang <zhangqing@loongson.cn>");
MODULE_LICENSE("GPL v2");
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