| // SPDX-License-Identifier: GPL-2.0-only |
| /******************************************************************************* |
| This contains the functions to handle the platform driver. |
| |
| Copyright (C) 2007-2011 STMicroelectronics Ltd |
| |
| |
| Author: Giuseppe Cavallaro <peppe.cavallaro@st.com> |
| *******************************************************************************/ |
| |
| #include <linux/platform_device.h> |
| #include <linux/module.h> |
| #include <linux/io.h> |
| #include <linux/of.h> |
| #include <linux/of_net.h> |
| #include <linux/of_device.h> |
| #include <linux/of_mdio.h> |
| |
| #include "stmmac.h" |
| #include "stmmac_platform.h" |
| |
| #ifdef CONFIG_OF |
| |
| /** |
| * dwmac1000_validate_mcast_bins - validates the number of Multicast filter bins |
| * @dev: struct device of the platform device |
| * @mcast_bins: Multicast filtering bins |
| * Description: |
| * this function validates the number of Multicast filtering bins specified |
| * by the configuration through the device tree. The Synopsys GMAC supports |
| * 64 bins, 128 bins, or 256 bins. "bins" refer to the division of CRC |
| * number space. 64 bins correspond to 6 bits of the CRC, 128 corresponds |
| * to 7 bits, and 256 refers to 8 bits of the CRC. Any other setting is |
| * invalid and will cause the filtering algorithm to use Multicast |
| * promiscuous mode. |
| */ |
| static int dwmac1000_validate_mcast_bins(struct device *dev, int mcast_bins) |
| { |
| int x = mcast_bins; |
| |
| switch (x) { |
| case HASH_TABLE_SIZE: |
| case 128: |
| case 256: |
| break; |
| default: |
| x = 0; |
| dev_info(dev, "Hash table entries set to unexpected value %d\n", |
| mcast_bins); |
| break; |
| } |
| return x; |
| } |
| |
| /** |
| * dwmac1000_validate_ucast_entries - validate the Unicast address entries |
| * @dev: struct device of the platform device |
| * @ucast_entries: number of Unicast address entries |
| * Description: |
| * This function validates the number of Unicast address entries supported |
| * by a particular Synopsys 10/100/1000 controller. The Synopsys controller |
| * supports 1..32, 64, or 128 Unicast filter entries for it's Unicast filter |
| * logic. This function validates a valid, supported configuration is |
| * selected, and defaults to 1 Unicast address if an unsupported |
| * configuration is selected. |
| */ |
| static int dwmac1000_validate_ucast_entries(struct device *dev, |
| int ucast_entries) |
| { |
| int x = ucast_entries; |
| |
| switch (x) { |
| case 1 ... 32: |
| case 64: |
| case 128: |
| break; |
| default: |
| x = 1; |
| dev_info(dev, "Unicast table entries set to unexpected value %d\n", |
| ucast_entries); |
| break; |
| } |
| return x; |
| } |
| |
| /** |
| * stmmac_axi_setup - parse DT parameters for programming the AXI register |
| * @pdev: platform device |
| * Description: |
| * if required, from device-tree the AXI internal register can be tuned |
| * by using platform parameters. |
| */ |
| static struct stmmac_axi *stmmac_axi_setup(struct platform_device *pdev) |
| { |
| struct device_node *np; |
| struct stmmac_axi *axi; |
| |
| np = of_parse_phandle(pdev->dev.of_node, "snps,axi-config", 0); |
| if (!np) |
| return NULL; |
| |
| axi = devm_kzalloc(&pdev->dev, sizeof(*axi), GFP_KERNEL); |
| if (!axi) { |
| of_node_put(np); |
| return ERR_PTR(-ENOMEM); |
| } |
| |
| axi->axi_lpi_en = of_property_read_bool(np, "snps,lpi_en"); |
| axi->axi_xit_frm = of_property_read_bool(np, "snps,xit_frm"); |
| axi->axi_kbbe = of_property_read_bool(np, "snps,axi_kbbe"); |
| axi->axi_fb = of_property_read_bool(np, "snps,axi_fb"); |
| axi->axi_mb = of_property_read_bool(np, "snps,axi_mb"); |
| axi->axi_rb = of_property_read_bool(np, "snps,axi_rb"); |
| |
| if (of_property_read_u32(np, "snps,wr_osr_lmt", &axi->axi_wr_osr_lmt)) |
| axi->axi_wr_osr_lmt = 1; |
| if (of_property_read_u32(np, "snps,rd_osr_lmt", &axi->axi_rd_osr_lmt)) |
| axi->axi_rd_osr_lmt = 1; |
| of_property_read_u32_array(np, "snps,blen", axi->axi_blen, AXI_BLEN); |
| of_node_put(np); |
| |
| return axi; |
| } |
| |
| /** |
| * stmmac_mtl_setup - parse DT parameters for multiple queues configuration |
| * @pdev: platform device |
| */ |
| static int stmmac_mtl_setup(struct platform_device *pdev, |
| struct plat_stmmacenet_data *plat) |
| { |
| struct device_node *q_node; |
| struct device_node *rx_node; |
| struct device_node *tx_node; |
| u8 queue = 0; |
| int ret = 0; |
| |
| /* For backwards-compatibility with device trees that don't have any |
| * snps,mtl-rx-config or snps,mtl-tx-config properties, we fall back |
| * to one RX and TX queues each. |
| */ |
| plat->rx_queues_to_use = 1; |
| plat->tx_queues_to_use = 1; |
| |
| /* First Queue must always be in DCB mode. As MTL_QUEUE_DCB = 1 we need |
| * to always set this, otherwise Queue will be classified as AVB |
| * (because MTL_QUEUE_AVB = 0). |
| */ |
| plat->rx_queues_cfg[0].mode_to_use = MTL_QUEUE_DCB; |
| plat->tx_queues_cfg[0].mode_to_use = MTL_QUEUE_DCB; |
| |
| rx_node = of_parse_phandle(pdev->dev.of_node, "snps,mtl-rx-config", 0); |
| if (!rx_node) |
| return ret; |
| |
| tx_node = of_parse_phandle(pdev->dev.of_node, "snps,mtl-tx-config", 0); |
| if (!tx_node) { |
| of_node_put(rx_node); |
| return ret; |
| } |
| |
| /* Processing RX queues common config */ |
| if (of_property_read_u32(rx_node, "snps,rx-queues-to-use", |
| &plat->rx_queues_to_use)) |
| plat->rx_queues_to_use = 1; |
| |
| if (of_property_read_bool(rx_node, "snps,rx-sched-sp")) |
| plat->rx_sched_algorithm = MTL_RX_ALGORITHM_SP; |
| else if (of_property_read_bool(rx_node, "snps,rx-sched-wsp")) |
| plat->rx_sched_algorithm = MTL_RX_ALGORITHM_WSP; |
| else |
| plat->rx_sched_algorithm = MTL_RX_ALGORITHM_SP; |
| |
| /* Processing individual RX queue config */ |
| for_each_child_of_node(rx_node, q_node) { |
| if (queue >= plat->rx_queues_to_use) |
| break; |
| |
| if (of_property_read_bool(q_node, "snps,dcb-algorithm")) |
| plat->rx_queues_cfg[queue].mode_to_use = MTL_QUEUE_DCB; |
| else if (of_property_read_bool(q_node, "snps,avb-algorithm")) |
| plat->rx_queues_cfg[queue].mode_to_use = MTL_QUEUE_AVB; |
| else |
| plat->rx_queues_cfg[queue].mode_to_use = MTL_QUEUE_DCB; |
| |
| if (of_property_read_u32(q_node, "snps,map-to-dma-channel", |
| &plat->rx_queues_cfg[queue].chan)) |
| plat->rx_queues_cfg[queue].chan = queue; |
| /* TODO: Dynamic mapping to be included in the future */ |
| |
| if (of_property_read_u32(q_node, "snps,priority", |
| &plat->rx_queues_cfg[queue].prio)) { |
| plat->rx_queues_cfg[queue].prio = 0; |
| plat->rx_queues_cfg[queue].use_prio = false; |
| } else { |
| plat->rx_queues_cfg[queue].use_prio = true; |
| } |
| |
| /* RX queue specific packet type routing */ |
| if (of_property_read_bool(q_node, "snps,route-avcp")) |
| plat->rx_queues_cfg[queue].pkt_route = PACKET_AVCPQ; |
| else if (of_property_read_bool(q_node, "snps,route-ptp")) |
| plat->rx_queues_cfg[queue].pkt_route = PACKET_PTPQ; |
| else if (of_property_read_bool(q_node, "snps,route-dcbcp")) |
| plat->rx_queues_cfg[queue].pkt_route = PACKET_DCBCPQ; |
| else if (of_property_read_bool(q_node, "snps,route-up")) |
| plat->rx_queues_cfg[queue].pkt_route = PACKET_UPQ; |
| else if (of_property_read_bool(q_node, "snps,route-multi-broad")) |
| plat->rx_queues_cfg[queue].pkt_route = PACKET_MCBCQ; |
| else |
| plat->rx_queues_cfg[queue].pkt_route = 0x0; |
| |
| queue++; |
| } |
| if (queue != plat->rx_queues_to_use) { |
| ret = -EINVAL; |
| dev_err(&pdev->dev, "Not all RX queues were configured\n"); |
| goto out; |
| } |
| |
| /* Processing TX queues common config */ |
| if (of_property_read_u32(tx_node, "snps,tx-queues-to-use", |
| &plat->tx_queues_to_use)) |
| plat->tx_queues_to_use = 1; |
| |
| if (of_property_read_bool(tx_node, "snps,tx-sched-wrr")) |
| plat->tx_sched_algorithm = MTL_TX_ALGORITHM_WRR; |
| else if (of_property_read_bool(tx_node, "snps,tx-sched-wfq")) |
| plat->tx_sched_algorithm = MTL_TX_ALGORITHM_WFQ; |
| else if (of_property_read_bool(tx_node, "snps,tx-sched-dwrr")) |
| plat->tx_sched_algorithm = MTL_TX_ALGORITHM_DWRR; |
| else if (of_property_read_bool(tx_node, "snps,tx-sched-sp")) |
| plat->tx_sched_algorithm = MTL_TX_ALGORITHM_SP; |
| else |
| plat->tx_sched_algorithm = MTL_TX_ALGORITHM_SP; |
| |
| queue = 0; |
| |
| /* Processing individual TX queue config */ |
| for_each_child_of_node(tx_node, q_node) { |
| if (queue >= plat->tx_queues_to_use) |
| break; |
| |
| if (of_property_read_u32(q_node, "snps,weight", |
| &plat->tx_queues_cfg[queue].weight)) |
| plat->tx_queues_cfg[queue].weight = 0x10 + queue; |
| |
| if (of_property_read_bool(q_node, "snps,dcb-algorithm")) { |
| plat->tx_queues_cfg[queue].mode_to_use = MTL_QUEUE_DCB; |
| } else if (of_property_read_bool(q_node, |
| "snps,avb-algorithm")) { |
| plat->tx_queues_cfg[queue].mode_to_use = MTL_QUEUE_AVB; |
| |
| /* Credit Base Shaper parameters used by AVB */ |
| if (of_property_read_u32(q_node, "snps,send_slope", |
| &plat->tx_queues_cfg[queue].send_slope)) |
| plat->tx_queues_cfg[queue].send_slope = 0x0; |
| if (of_property_read_u32(q_node, "snps,idle_slope", |
| &plat->tx_queues_cfg[queue].idle_slope)) |
| plat->tx_queues_cfg[queue].idle_slope = 0x0; |
| if (of_property_read_u32(q_node, "snps,high_credit", |
| &plat->tx_queues_cfg[queue].high_credit)) |
| plat->tx_queues_cfg[queue].high_credit = 0x0; |
| if (of_property_read_u32(q_node, "snps,low_credit", |
| &plat->tx_queues_cfg[queue].low_credit)) |
| plat->tx_queues_cfg[queue].low_credit = 0x0; |
| } else { |
| plat->tx_queues_cfg[queue].mode_to_use = MTL_QUEUE_DCB; |
| } |
| |
| if (of_property_read_u32(q_node, "snps,priority", |
| &plat->tx_queues_cfg[queue].prio)) { |
| plat->tx_queues_cfg[queue].prio = 0; |
| plat->tx_queues_cfg[queue].use_prio = false; |
| } else { |
| plat->tx_queues_cfg[queue].use_prio = true; |
| } |
| |
| queue++; |
| } |
| if (queue != plat->tx_queues_to_use) { |
| ret = -EINVAL; |
| dev_err(&pdev->dev, "Not all TX queues were configured\n"); |
| goto out; |
| } |
| |
| out: |
| of_node_put(rx_node); |
| of_node_put(tx_node); |
| of_node_put(q_node); |
| |
| return ret; |
| } |
| |
| /** |
| * stmmac_dt_phy - parse device-tree driver parameters to allocate PHY resources |
| * @plat: driver data platform structure |
| * @np: device tree node |
| * @dev: device pointer |
| * Description: |
| * The mdio bus will be allocated in case of a phy transceiver is on board; |
| * it will be NULL if the fixed-link is configured. |
| * If there is the "snps,dwmac-mdio" sub-node the mdio will be allocated |
| * in any case (for DSA, mdio must be registered even if fixed-link). |
| * The table below sums the supported configurations: |
| * ------------------------------- |
| * snps,phy-addr | Y |
| * ------------------------------- |
| * phy-handle | Y |
| * ------------------------------- |
| * fixed-link | N |
| * ------------------------------- |
| * snps,dwmac-mdio | |
| * even if | Y |
| * fixed-link | |
| * ------------------------------- |
| * |
| * It returns 0 in case of success otherwise -ENODEV. |
| */ |
| static int stmmac_dt_phy(struct plat_stmmacenet_data *plat, |
| struct device_node *np, struct device *dev) |
| { |
| bool mdio = !of_phy_is_fixed_link(np); |
| static const struct of_device_id need_mdio_ids[] = { |
| { .compatible = "snps,dwc-qos-ethernet-4.10" }, |
| {}, |
| }; |
| |
| if (of_match_node(need_mdio_ids, np)) { |
| plat->mdio_node = of_get_child_by_name(np, "mdio"); |
| } else { |
| /** |
| * If snps,dwmac-mdio is passed from DT, always register |
| * the MDIO |
| */ |
| for_each_child_of_node(np, plat->mdio_node) { |
| if (of_device_is_compatible(plat->mdio_node, |
| "snps,dwmac-mdio")) |
| break; |
| } |
| } |
| |
| if (plat->mdio_node) { |
| dev_dbg(dev, "Found MDIO subnode\n"); |
| mdio = true; |
| } |
| |
| if (mdio) { |
| plat->mdio_bus_data = |
| devm_kzalloc(dev, sizeof(struct stmmac_mdio_bus_data), |
| GFP_KERNEL); |
| if (!plat->mdio_bus_data) |
| return -ENOMEM; |
| |
| plat->mdio_bus_data->needs_reset = true; |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * stmmac_of_get_mac_mode - retrieves the interface of the MAC |
| * @np - device-tree node |
| * Description: |
| * Similar to `of_get_phy_mode()`, this function will retrieve (from |
| * the device-tree) the interface mode on the MAC side. This assumes |
| * that there is mode converter in-between the MAC & PHY |
| * (e.g. GMII-to-RGMII). |
| */ |
| static int stmmac_of_get_mac_mode(struct device_node *np) |
| { |
| const char *pm; |
| int err, i; |
| |
| err = of_property_read_string(np, "mac-mode", &pm); |
| if (err < 0) |
| return err; |
| |
| for (i = 0; i < PHY_INTERFACE_MODE_MAX; i++) { |
| if (!strcasecmp(pm, phy_modes(i))) |
| return i; |
| } |
| |
| return -ENODEV; |
| } |
| |
| /** |
| * stmmac_probe_config_dt - parse device-tree driver parameters |
| * @pdev: platform_device structure |
| * @mac: MAC address to use |
| * Description: |
| * this function is to read the driver parameters from device-tree and |
| * set some private fields that will be used by the main at runtime. |
| */ |
| struct plat_stmmacenet_data * |
| stmmac_probe_config_dt(struct platform_device *pdev, const char **mac) |
| { |
| struct device_node *np = pdev->dev.of_node; |
| struct plat_stmmacenet_data *plat; |
| struct stmmac_dma_cfg *dma_cfg; |
| int rc; |
| |
| plat = devm_kzalloc(&pdev->dev, sizeof(*plat), GFP_KERNEL); |
| if (!plat) |
| return ERR_PTR(-ENOMEM); |
| |
| *mac = of_get_mac_address(np); |
| if (IS_ERR(*mac)) { |
| if (PTR_ERR(*mac) == -EPROBE_DEFER) |
| return ERR_CAST(*mac); |
| |
| *mac = NULL; |
| } |
| |
| rc = of_get_phy_mode(np, &plat->phy_interface); |
| if (rc) |
| return ERR_PTR(rc); |
| |
| plat->interface = stmmac_of_get_mac_mode(np); |
| if (plat->interface < 0) |
| plat->interface = plat->phy_interface; |
| |
| /* Some wrapper drivers still rely on phy_node. Let's save it while |
| * they are not converted to phylink. */ |
| plat->phy_node = of_parse_phandle(np, "phy-handle", 0); |
| |
| /* PHYLINK automatically parses the phy-handle property */ |
| plat->phylink_node = np; |
| |
| /* Get max speed of operation from device tree */ |
| if (of_property_read_u32(np, "max-speed", &plat->max_speed)) |
| plat->max_speed = -1; |
| |
| plat->bus_id = of_alias_get_id(np, "ethernet"); |
| if (plat->bus_id < 0) |
| plat->bus_id = 0; |
| |
| /* Default to phy auto-detection */ |
| plat->phy_addr = -1; |
| |
| /* Default to get clk_csr from stmmac_clk_crs_set(), |
| * or get clk_csr from device tree. |
| */ |
| plat->clk_csr = -1; |
| of_property_read_u32(np, "clk_csr", &plat->clk_csr); |
| |
| /* "snps,phy-addr" is not a standard property. Mark it as deprecated |
| * and warn of its use. Remove this when phy node support is added. |
| */ |
| if (of_property_read_u32(np, "snps,phy-addr", &plat->phy_addr) == 0) |
| dev_warn(&pdev->dev, "snps,phy-addr property is deprecated\n"); |
| |
| /* To Configure PHY by using all device-tree supported properties */ |
| rc = stmmac_dt_phy(plat, np, &pdev->dev); |
| if (rc) |
| return ERR_PTR(rc); |
| |
| of_property_read_u32(np, "tx-fifo-depth", &plat->tx_fifo_size); |
| |
| of_property_read_u32(np, "rx-fifo-depth", &plat->rx_fifo_size); |
| |
| plat->force_sf_dma_mode = |
| of_property_read_bool(np, "snps,force_sf_dma_mode"); |
| |
| plat->en_tx_lpi_clockgating = |
| of_property_read_bool(np, "snps,en-tx-lpi-clockgating"); |
| |
| /* Set the maxmtu to a default of JUMBO_LEN in case the |
| * parameter is not present in the device tree. |
| */ |
| plat->maxmtu = JUMBO_LEN; |
| |
| /* 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; |
| |
| /* |
| * Currently only the properties needed on SPEAr600 |
| * are provided. All other properties should be added |
| * once needed on other platforms. |
| */ |
| if (of_device_is_compatible(np, "st,spear600-gmac") || |
| of_device_is_compatible(np, "snps,dwmac-3.50a") || |
| of_device_is_compatible(np, "snps,dwmac-3.70a") || |
| of_device_is_compatible(np, "snps,dwmac")) { |
| /* Note that the max-frame-size parameter as defined in the |
| * ePAPR v1.1 spec is defined as max-frame-size, it's |
| * actually used as the IEEE definition of MAC Client |
| * data, or MTU. The ePAPR specification is confusing as |
| * the definition is max-frame-size, but usage examples |
| * are clearly MTUs |
| */ |
| of_property_read_u32(np, "max-frame-size", &plat->maxmtu); |
| of_property_read_u32(np, "snps,multicast-filter-bins", |
| &plat->multicast_filter_bins); |
| of_property_read_u32(np, "snps,perfect-filter-entries", |
| &plat->unicast_filter_entries); |
| plat->unicast_filter_entries = dwmac1000_validate_ucast_entries( |
| &pdev->dev, plat->unicast_filter_entries); |
| plat->multicast_filter_bins = dwmac1000_validate_mcast_bins( |
| &pdev->dev, plat->multicast_filter_bins); |
| plat->has_gmac = 1; |
| plat->pmt = 1; |
| } |
| |
| if (of_device_is_compatible(np, "snps,dwmac-4.00") || |
| of_device_is_compatible(np, "snps,dwmac-4.10a") || |
| of_device_is_compatible(np, "snps,dwmac-4.20a")) { |
| plat->has_gmac4 = 1; |
| plat->has_gmac = 0; |
| plat->pmt = 1; |
| plat->tso_en = of_property_read_bool(np, "snps,tso"); |
| } |
| |
| if (of_device_is_compatible(np, "snps,dwmac-3.610") || |
| of_device_is_compatible(np, "snps,dwmac-3.710")) { |
| plat->enh_desc = 1; |
| plat->bugged_jumbo = 1; |
| plat->force_sf_dma_mode = 1; |
| } |
| |
| if (of_device_is_compatible(np, "snps,dwxgmac")) { |
| plat->has_xgmac = 1; |
| plat->pmt = 1; |
| plat->tso_en = of_property_read_bool(np, "snps,tso"); |
| } |
| |
| dma_cfg = devm_kzalloc(&pdev->dev, sizeof(*dma_cfg), |
| GFP_KERNEL); |
| if (!dma_cfg) { |
| stmmac_remove_config_dt(pdev, plat); |
| return ERR_PTR(-ENOMEM); |
| } |
| plat->dma_cfg = dma_cfg; |
| |
| of_property_read_u32(np, "snps,pbl", &dma_cfg->pbl); |
| if (!dma_cfg->pbl) |
| dma_cfg->pbl = DEFAULT_DMA_PBL; |
| of_property_read_u32(np, "snps,txpbl", &dma_cfg->txpbl); |
| of_property_read_u32(np, "snps,rxpbl", &dma_cfg->rxpbl); |
| dma_cfg->pblx8 = !of_property_read_bool(np, "snps,no-pbl-x8"); |
| |
| dma_cfg->aal = of_property_read_bool(np, "snps,aal"); |
| dma_cfg->fixed_burst = of_property_read_bool(np, "snps,fixed-burst"); |
| dma_cfg->mixed_burst = of_property_read_bool(np, "snps,mixed-burst"); |
| |
| plat->force_thresh_dma_mode = of_property_read_bool(np, "snps,force_thresh_dma_mode"); |
| if (plat->force_thresh_dma_mode) { |
| plat->force_sf_dma_mode = 0; |
| dev_warn(&pdev->dev, |
| "force_sf_dma_mode is ignored if force_thresh_dma_mode is set.\n"); |
| } |
| |
| of_property_read_u32(np, "snps,ps-speed", &plat->mac_port_sel_speed); |
| |
| plat->axi = stmmac_axi_setup(pdev); |
| |
| rc = stmmac_mtl_setup(pdev, plat); |
| if (rc) { |
| stmmac_remove_config_dt(pdev, plat); |
| return ERR_PTR(rc); |
| } |
| |
| /* clock setup */ |
| if (!of_device_is_compatible(np, "snps,dwc-qos-ethernet-4.10")) { |
| plat->stmmac_clk = devm_clk_get(&pdev->dev, |
| STMMAC_RESOURCE_NAME); |
| if (IS_ERR(plat->stmmac_clk)) { |
| dev_warn(&pdev->dev, "Cannot get CSR clock\n"); |
| plat->stmmac_clk = NULL; |
| } |
| clk_prepare_enable(plat->stmmac_clk); |
| } |
| |
| plat->pclk = devm_clk_get(&pdev->dev, "pclk"); |
| if (IS_ERR(plat->pclk)) { |
| if (PTR_ERR(plat->pclk) == -EPROBE_DEFER) |
| goto error_pclk_get; |
| |
| plat->pclk = NULL; |
| } |
| clk_prepare_enable(plat->pclk); |
| |
| /* Fall-back to main clock in case of no PTP ref is passed */ |
| plat->clk_ptp_ref = devm_clk_get(&pdev->dev, "ptp_ref"); |
| if (IS_ERR(plat->clk_ptp_ref)) { |
| plat->clk_ptp_rate = clk_get_rate(plat->stmmac_clk); |
| plat->clk_ptp_ref = NULL; |
| dev_warn(&pdev->dev, "PTP uses main clock\n"); |
| } else { |
| plat->clk_ptp_rate = clk_get_rate(plat->clk_ptp_ref); |
| dev_dbg(&pdev->dev, "PTP rate %d\n", plat->clk_ptp_rate); |
| } |
| |
| plat->stmmac_rst = devm_reset_control_get(&pdev->dev, |
| STMMAC_RESOURCE_NAME); |
| if (IS_ERR(plat->stmmac_rst)) { |
| if (PTR_ERR(plat->stmmac_rst) == -EPROBE_DEFER) |
| goto error_hw_init; |
| |
| dev_info(&pdev->dev, "no reset control found\n"); |
| plat->stmmac_rst = NULL; |
| } |
| |
| return plat; |
| |
| error_hw_init: |
| clk_disable_unprepare(plat->pclk); |
| error_pclk_get: |
| clk_disable_unprepare(plat->stmmac_clk); |
| |
| return ERR_PTR(-EPROBE_DEFER); |
| } |
| |
| /** |
| * stmmac_remove_config_dt - undo the effects of stmmac_probe_config_dt() |
| * @pdev: platform_device structure |
| * @plat: driver data platform structure |
| * |
| * Release resources claimed by stmmac_probe_config_dt(). |
| */ |
| void stmmac_remove_config_dt(struct platform_device *pdev, |
| struct plat_stmmacenet_data *plat) |
| { |
| of_node_put(plat->phy_node); |
| of_node_put(plat->mdio_node); |
| } |
| #else |
| struct plat_stmmacenet_data * |
| stmmac_probe_config_dt(struct platform_device *pdev, const char **mac) |
| { |
| return ERR_PTR(-EINVAL); |
| } |
| |
| void stmmac_remove_config_dt(struct platform_device *pdev, |
| struct plat_stmmacenet_data *plat) |
| { |
| } |
| #endif /* CONFIG_OF */ |
| EXPORT_SYMBOL_GPL(stmmac_probe_config_dt); |
| EXPORT_SYMBOL_GPL(stmmac_remove_config_dt); |
| |
| int stmmac_get_platform_resources(struct platform_device *pdev, |
| struct stmmac_resources *stmmac_res) |
| { |
| struct resource *res; |
| |
| memset(stmmac_res, 0, sizeof(*stmmac_res)); |
| |
| /* Get IRQ information early to have an ability to ask for deferred |
| * probe if needed before we went too far with resource allocation. |
| */ |
| stmmac_res->irq = platform_get_irq_byname(pdev, "macirq"); |
| if (stmmac_res->irq < 0) |
| return stmmac_res->irq; |
| |
| /* On some platforms e.g. SPEAr the wake up irq differs from the mac irq |
| * The external wake up irq can be passed through the platform code |
| * named as "eth_wake_irq" |
| * |
| * In case the wake up interrupt is not passed from the platform |
| * so the driver will continue to use the mac irq (ndev->irq) |
| */ |
| stmmac_res->wol_irq = platform_get_irq_byname(pdev, "eth_wake_irq"); |
| if (stmmac_res->wol_irq < 0) { |
| if (stmmac_res->wol_irq == -EPROBE_DEFER) |
| return -EPROBE_DEFER; |
| stmmac_res->wol_irq = stmmac_res->irq; |
| } |
| |
| stmmac_res->lpi_irq = platform_get_irq_byname(pdev, "eth_lpi"); |
| if (stmmac_res->lpi_irq == -EPROBE_DEFER) |
| return -EPROBE_DEFER; |
| |
| res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| stmmac_res->addr = devm_ioremap_resource(&pdev->dev, res); |
| |
| return PTR_ERR_OR_ZERO(stmmac_res->addr); |
| } |
| EXPORT_SYMBOL_GPL(stmmac_get_platform_resources); |
| |
| /** |
| * stmmac_pltfr_remove |
| * @pdev: platform device pointer |
| * Description: this function calls the main to free the net resources |
| * and calls the platforms hook and release the resources (e.g. mem). |
| */ |
| int stmmac_pltfr_remove(struct platform_device *pdev) |
| { |
| struct net_device *ndev = platform_get_drvdata(pdev); |
| struct stmmac_priv *priv = netdev_priv(ndev); |
| struct plat_stmmacenet_data *plat = priv->plat; |
| int ret = stmmac_dvr_remove(&pdev->dev); |
| |
| if (plat->exit) |
| plat->exit(pdev, plat->bsp_priv); |
| |
| stmmac_remove_config_dt(pdev, plat); |
| |
| return ret; |
| } |
| EXPORT_SYMBOL_GPL(stmmac_pltfr_remove); |
| |
| #ifdef CONFIG_PM_SLEEP |
| /** |
| * stmmac_pltfr_suspend |
| * @dev: device pointer |
| * Description: this function is invoked when suspend the driver and it direcly |
| * call the main suspend function and then, if required, on some platform, it |
| * can call an exit helper. |
| */ |
| static int stmmac_pltfr_suspend(struct device *dev) |
| { |
| int ret; |
| struct net_device *ndev = dev_get_drvdata(dev); |
| struct stmmac_priv *priv = netdev_priv(ndev); |
| struct platform_device *pdev = to_platform_device(dev); |
| |
| ret = stmmac_suspend(dev); |
| if (priv->plat->exit) |
| priv->plat->exit(pdev, priv->plat->bsp_priv); |
| |
| return ret; |
| } |
| |
| /** |
| * stmmac_pltfr_resume |
| * @dev: device pointer |
| * Description: this function is invoked when resume the driver before calling |
| * the main resume function, on some platforms, it can call own init helper |
| * if required. |
| */ |
| static int stmmac_pltfr_resume(struct device *dev) |
| { |
| struct net_device *ndev = dev_get_drvdata(dev); |
| struct stmmac_priv *priv = netdev_priv(ndev); |
| struct platform_device *pdev = to_platform_device(dev); |
| |
| if (priv->plat->init) |
| priv->plat->init(pdev, priv->plat->bsp_priv); |
| |
| return stmmac_resume(dev); |
| } |
| #endif /* CONFIG_PM_SLEEP */ |
| |
| SIMPLE_DEV_PM_OPS(stmmac_pltfr_pm_ops, stmmac_pltfr_suspend, |
| stmmac_pltfr_resume); |
| EXPORT_SYMBOL_GPL(stmmac_pltfr_pm_ops); |
| |
| MODULE_DESCRIPTION("STMMAC 10/100/1000 Ethernet platform support"); |
| MODULE_AUTHOR("Giuseppe Cavallaro <peppe.cavallaro@st.com>"); |
| MODULE_LICENSE("GPL"); |
