stmmac_platform.rar_The Handle

/******************************************************************************* This contains the functions to handle the platform driver. Copyright (C) 2007-2011 STMicroelectronics Ltd This program is free software; you can redistribute it and/or modify it under the terms and conditions of the GNU General Public License, version 2, as published by the Free Software Foundation. This program is distributed in the hope it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. The full GNU General Public License is included in this distribution in the file called "COPYING". Author: Giuseppe Cavallaro <peppe.cavallaro@st.com> *******************************************************************************/ #include <linux/platform_device.h> #include <linux/io.h> #include <linux/of.h> #include <linux/of_net.h> #include <linux/of_device.h> #include "stmmac.h" #include "stmmac_platform.h" static const struct of_device_id stmmac_dt_ids[] = { /* SoC specific glue layers should come before generic bindings */ { .compatible = "amlogic,meson6-dwmac", .data = &meson6_dwmac_data}, { .compatible = "allwinner,sun7i-a20-gmac", .data = &sun7i_gmac_data}, { .compatible = "st,stih415-dwmac", .data = &stih4xx_dwmac_data}, { .compatible = "st,stih416-dwmac", .data = &stih4xx_dwmac_data}, { .compatible = "st,stid127-dwmac", .data = &stid127_dwmac_data}, { .compatible = "st,stih407-dwmac", .data = &stih4xx_dwmac_data}, { .compatible = "altr,socfpga-stmmac", .data = &socfpga_gmac_data }, { .compatible = "st,spear600-gmac"}, { .compatible = "snps,dwmac-3.610"}, { .compatible = "snps,dwmac-3.70a"}, { .compatible = "snps,dwmac-3.710"}, { .compatible = "snps,dwmac"}, { /* sentinel */ } }; MODULE_DEVICE_TABLE(of, stmmac_dt_ids); #ifdef CONFIG_OF /** * dwmac1000_validate_mcast_bins - validates the number of Multicast filter bins * @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(int mcast_bins) { int x = mcast_bins; switch (x) { case HASH_TABLE_SIZE: case 128: case 256: break; default: x = 0; pr_info("Hash table entries set to unexpected value %d", mcast_bins); break; } return x; } /** * dwmac1000_validate_ucast_entries - validate the Unicast address entries * @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(int ucast_entries) { int x = ucast_entries; switch (x) { case 1: case 32: case 64: case 128: break; default: x = 1; pr_info("Unicast table entries set to unexpected value %d\n", ucast_entries); break; } return x; } /** * stmmac_probe_config_dt - parse device-tree driver parameters * @pdev: platform_device structure * @plat: driver data platform 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. */ static int stmmac_probe_config_dt(struct platform_device *pdev, struct plat_stmmacenet_data *plat, const char **mac) { struct device_node *np = pdev->dev.of_node; struct stmmac_dma_cfg *dma_cfg; const struct of_device_id *device; if (!np) return -ENODEV; device = of_match_device(stmmac_dt_ids, &pdev->dev); if (!device) return -ENODEV; if (device->data) { const struct stmmac_of_data *data = device->data; plat->has_gmac = data->has_gmac; plat->enh_desc = data->enh_desc; plat->tx_coe = data->tx_coe; plat->rx_coe = data->rx_coe; plat->bugged_jumbo = data->bugged_jumbo; plat->pmt = data->pmt; plat->riwt_off = data->riwt_off; plat->fix_mac_speed = data->fix_mac_speed; plat->bus_setup = data->bus_setup; plat->setup = data->setup; plat->free = data->free; plat->init = data->init; plat->exit = data->exit; } *mac = of_get_mac_address(np); plat->interface = of_get_phy_mode(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; /* "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"); if (plat->phy_bus_name) plat->mdio_bus_data = NULL; else plat->mdio_bus_data = devm_kzalloc(&pdev->dev, sizeof(struct stmmac_mdio_bus_data), GFP_KERNEL); plat->force_sf_dma_mode = of_property_read_bool(np, "snps,force_sf_dma_mode"); /* Set the maxmtu to a default of JUMBO_LEN in case the * parameter is not present in the device tree. */ plat->maxmtu = JUMBO_LEN; /* * 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-3.70a") || 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( plat->unicast_filter_entries); plat->multicast_filter_bins = dwmac1000_validate_mcast_bins( plat->multicast_filter_bins); plat->has_gmac = 1; plat->pmt = 1; } 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_find_property(np, "snps,pbl", NULL)) { dma_cfg = devm_kzalloc(&pdev->dev, sizeof(*dma_cfg), GFP_KERNEL); if (!dma_cfg) return -ENOMEM; plat->dma_cfg = dma_cfg; of_property_read_u32(np, "snps,pbl", &dma_cfg->pbl); 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; pr_warn("force_sf_dma_mode is igno