This GMAC module is integrated into the Loongson-2K SoC and the LS7A
bridge chip.
Signed-off-by: Qing Zhang <zhangqing@xxxxxxxxxxx>
Signed-off-by: Jiaxun Yang <jiaxun.yang@xxxxxxxxxxx>
---
drivers/net/ethernet/stmicro/stmmac/Kconfig | 9 +
drivers/net/ethernet/stmicro/stmmac/Makefile | 1 +
.../ethernet/stmicro/stmmac/dwmac-loongson.c | 218 ++++++++++++++++++
3 files changed, 228 insertions(+)
create mode 100644 drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c
diff --git a/drivers/net/ethernet/stmicro/stmmac/Kconfig b/drivers/net/ethernet/stmicro/stmmac/Kconfig
index 7737e4d0bb9e..0fc4532a2caa 100644
--- a/drivers/net/ethernet/stmicro/stmmac/Kconfig
+++ b/drivers/net/ethernet/stmicro/stmmac/Kconfig
@@ -238,6 +238,15 @@ config DWMAC_INTEL
This selects the Intel platform specific bus support for the
stmmac driver. This driver is used for Intel Quark/EHL/TGL.
+config DWMAC_LOONGSON
+ tristate "Loongson PCI DWMAC support"
+ default MACH_LOONGSON64
+ depends on STMMAC_ETH && PCI
+ depends on COMMON_CLK
+ help
+ This selects the LOONGSON PCI bus support for the stmmac driver,
+ Support for ethernet controller on Loongson-2K1000 SoC and LS7A1000 bridge.
+
config STMMAC_PCI
tristate "STMMAC PCI bus support"
depends on STMMAC_ETH && PCI
diff --git a/drivers/net/ethernet/stmicro/stmmac/Makefile b/drivers/net/ethernet/stmicro/stmmac/Makefile
index f2e478b884b0..56d0d536859c 100644
--- a/drivers/net/ethernet/stmicro/stmmac/Makefile
+++ b/drivers/net/ethernet/stmicro/stmmac/Makefile
@@ -36,4 +36,5 @@ dwmac-altr-socfpga-objs := altr_tse_pcs.o dwmac-socfpga.o
obj-$(CONFIG_STMMAC_PCI) += stmmac-pci.o
obj-$(CONFIG_DWMAC_INTEL) += dwmac-intel.o
+obj-$(CONFIG_DWMAC_LOONGSON) += dwmac-loongson.o
stmmac-pci-objs:= stmmac_pci.o
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c
new file mode 100644
index 000000000000..8cd4e2e8ec40
--- /dev/null
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c
@@ -0,0 +1,218 @@
+// 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;
+ int ret, i, mdio;
+ struct device_node *np;
+
+ 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);
+
+ plat->phy_interface = device_get_phy_mode(&pdev->dev);
+ if (plat->phy_interface < 0)
+ dev_err(&pdev->dev, "phy_mode not found\n");
+
+ 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);
+
+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@xxxxxxxxxxx>");
+MODULE_LICENSE("GPL v2");
--
2.31.0
