418 lines
12 KiB
C
418 lines
12 KiB
C
/*******************************************************************************
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This contains the functions to handle the platform driver.
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Copyright (C) 2007-2011 STMicroelectronics Ltd
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This program is free software; you can redistribute it and/or modify it
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under the terms and conditions of the GNU General Public License,
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version 2, as published by the Free Software Foundation.
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This program is distributed in the hope it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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more details.
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You should have received a copy of the GNU General Public License along with
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this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
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The full GNU General Public License is included in this distribution in
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the file called "COPYING".
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Author: Giuseppe Cavallaro <peppe.cavallaro@st.com>
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*******************************************************************************/
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#include <linux/platform_device.h>
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#include <linux/io.h>
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#include <linux/of.h>
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#include <linux/of_net.h>
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#include <linux/of_device.h>
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#include "stmmac.h"
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static const struct of_device_id stmmac_dt_ids[] = {
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#ifdef CONFIG_DWMAC_MESON
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{ .compatible = "amlogic,meson6-dwmac", .data = &meson6_dwmac_data},
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#endif
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#ifdef CONFIG_DWMAC_SUNXI
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{ .compatible = "allwinner,sun7i-a20-gmac", .data = &sun7i_gmac_data},
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#endif
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#ifdef CONFIG_DWMAC_STI
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{ .compatible = "st,stih415-dwmac", .data = &stih4xx_dwmac_data},
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{ .compatible = "st,stih416-dwmac", .data = &stih4xx_dwmac_data},
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{ .compatible = "st,stid127-dwmac", .data = &stid127_dwmac_data},
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{ .compatible = "st,stih407-dwmac", .data = &stih4xx_dwmac_data},
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#endif
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#ifdef CONFIG_DWMAC_SOCFPGA
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{ .compatible = "altr,socfpga-stmmac", .data = &socfpga_gmac_data },
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#endif
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/* SoC specific glue layers should come before generic bindings */
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{ .compatible = "st,spear600-gmac"},
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{ .compatible = "snps,dwmac-3.610"},
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{ .compatible = "snps,dwmac-3.70a"},
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{ .compatible = "snps,dwmac-3.710"},
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{ .compatible = "snps,dwmac"},
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{ /* sentinel */ }
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};
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MODULE_DEVICE_TABLE(of, stmmac_dt_ids);
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#ifdef CONFIG_OF
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/* This function validates the number of Multicast filtering bins specified
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* by the configuration through the device tree. The Synopsys GMAC supports
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* 64 bins, 128 bins, or 256 bins. "bins" refer to the division of CRC
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* number space. 64 bins correspond to 6 bits of the CRC, 128 corresponds
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* to 7 bits, and 256 refers to 8 bits of the CRC. Any other setting is
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* invalid and will cause the filtering algorithm to use Multicast
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* promiscuous mode.
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*/
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static int dwmac1000_validate_mcast_bins(int mcast_bins)
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{
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int x = mcast_bins;
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switch (x) {
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case HASH_TABLE_SIZE:
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case 128:
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case 256:
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break;
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default:
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x = 0;
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pr_info("Hash table entries set to unexpected value %d",
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mcast_bins);
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break;
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}
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return x;
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}
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/* This function validates the number of Unicast address entries supported
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* by a particular Synopsys 10/100/1000 controller. The Synopsys controller
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* supports 1, 32, 64, or 128 Unicast filter entries for it's Unicast filter
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* logic. This function validates a valid, supported configuration is
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* selected, and defaults to 1 Unicast address if an unsupported
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* configuration is selected.
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*/
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static int dwmac1000_validate_ucast_entries(int ucast_entries)
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{
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int x = ucast_entries;
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switch (x) {
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case 1:
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case 32:
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case 64:
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case 128:
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break;
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default:
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x = 1;
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pr_info("Unicast table entries set to unexpected value %d\n",
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ucast_entries);
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break;
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}
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return x;
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}
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static int stmmac_probe_config_dt(struct platform_device *pdev,
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struct plat_stmmacenet_data *plat,
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const char **mac)
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{
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struct device_node *np = pdev->dev.of_node;
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struct stmmac_dma_cfg *dma_cfg;
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const struct of_device_id *device;
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if (!np)
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return -ENODEV;
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device = of_match_device(stmmac_dt_ids, &pdev->dev);
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if (!device)
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return -ENODEV;
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if (device->data) {
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const struct stmmac_of_data *data = device->data;
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plat->has_gmac = data->has_gmac;
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plat->enh_desc = data->enh_desc;
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plat->tx_coe = data->tx_coe;
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plat->rx_coe = data->rx_coe;
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plat->bugged_jumbo = data->bugged_jumbo;
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plat->pmt = data->pmt;
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plat->riwt_off = data->riwt_off;
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plat->fix_mac_speed = data->fix_mac_speed;
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plat->bus_setup = data->bus_setup;
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plat->setup = data->setup;
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plat->free = data->free;
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plat->init = data->init;
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plat->exit = data->exit;
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}
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*mac = of_get_mac_address(np);
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plat->interface = of_get_phy_mode(np);
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/* Get max speed of operation from device tree */
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if (of_property_read_u32(np, "max-speed", &plat->max_speed))
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plat->max_speed = -1;
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plat->bus_id = of_alias_get_id(np, "ethernet");
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if (plat->bus_id < 0)
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plat->bus_id = 0;
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/* Default to phy auto-detection */
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plat->phy_addr = -1;
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/* "snps,phy-addr" is not a standard property. Mark it as deprecated
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* and warn of its use. Remove this when phy node support is added.
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*/
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if (of_property_read_u32(np, "snps,phy-addr", &plat->phy_addr) == 0)
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dev_warn(&pdev->dev, "snps,phy-addr property is deprecated\n");
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if (plat->phy_bus_name)
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plat->mdio_bus_data = NULL;
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else
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plat->mdio_bus_data =
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devm_kzalloc(&pdev->dev,
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sizeof(struct stmmac_mdio_bus_data),
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GFP_KERNEL);
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plat->force_sf_dma_mode =
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of_property_read_bool(np, "snps,force_sf_dma_mode");
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/* Set the maxmtu to a default of JUMBO_LEN in case the
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* parameter is not present in the device tree.
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*/
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plat->maxmtu = JUMBO_LEN;
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/*
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* Currently only the properties needed on SPEAr600
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* are provided. All other properties should be added
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* once needed on other platforms.
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*/
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if (of_device_is_compatible(np, "st,spear600-gmac") ||
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of_device_is_compatible(np, "snps,dwmac-3.70a") ||
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of_device_is_compatible(np, "snps,dwmac")) {
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/* Note that the max-frame-size parameter as defined in the
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* ePAPR v1.1 spec is defined as max-frame-size, it's
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* actually used as the IEEE definition of MAC Client
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* data, or MTU. The ePAPR specification is confusing as
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* the definition is max-frame-size, but usage examples
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* are clearly MTUs
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*/
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of_property_read_u32(np, "max-frame-size", &plat->maxmtu);
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of_property_read_u32(np, "snps,multicast-filter-bins",
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&plat->multicast_filter_bins);
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of_property_read_u32(np, "snps,perfect-filter-entries",
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&plat->unicast_filter_entries);
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plat->unicast_filter_entries = dwmac1000_validate_ucast_entries(
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plat->unicast_filter_entries);
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plat->multicast_filter_bins = dwmac1000_validate_mcast_bins(
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plat->multicast_filter_bins);
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plat->has_gmac = 1;
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plat->pmt = 1;
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}
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if (of_device_is_compatible(np, "snps,dwmac-3.610") ||
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of_device_is_compatible(np, "snps,dwmac-3.710")) {
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plat->enh_desc = 1;
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plat->bugged_jumbo = 1;
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plat->force_sf_dma_mode = 1;
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}
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if (of_find_property(np, "snps,pbl", NULL)) {
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dma_cfg = devm_kzalloc(&pdev->dev, sizeof(*dma_cfg),
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GFP_KERNEL);
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if (!dma_cfg)
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return -ENOMEM;
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plat->dma_cfg = dma_cfg;
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of_property_read_u32(np, "snps,pbl", &dma_cfg->pbl);
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dma_cfg->fixed_burst =
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of_property_read_bool(np, "snps,fixed-burst");
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dma_cfg->mixed_burst =
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of_property_read_bool(np, "snps,mixed-burst");
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}
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plat->force_thresh_dma_mode = of_property_read_bool(np, "snps,force_thresh_dma_mode");
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if (plat->force_thresh_dma_mode) {
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plat->force_sf_dma_mode = 0;
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pr_warn("force_sf_dma_mode is ignored if force_thresh_dma_mode is set.");
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}
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return 0;
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}
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#else
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static int stmmac_probe_config_dt(struct platform_device *pdev,
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struct plat_stmmacenet_data *plat,
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const char **mac)
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{
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return -ENOSYS;
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}
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#endif /* CONFIG_OF */
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/**
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* stmmac_pltfr_probe
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* @pdev: platform device pointer
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* Description: platform_device probe function. It allocates
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* the necessary resources and invokes the main to init
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* the net device, register the mdio bus etc.
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*/
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static int stmmac_pltfr_probe(struct platform_device *pdev)
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{
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int ret = 0;
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struct resource *res;
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struct device *dev = &pdev->dev;
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void __iomem *addr = NULL;
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struct stmmac_priv *priv = NULL;
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struct plat_stmmacenet_data *plat_dat = NULL;
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const char *mac = NULL;
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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addr = devm_ioremap_resource(dev, res);
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if (IS_ERR(addr))
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return PTR_ERR(addr);
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plat_dat = dev_get_platdata(&pdev->dev);
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if (!plat_dat)
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plat_dat = devm_kzalloc(&pdev->dev,
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sizeof(struct plat_stmmacenet_data),
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GFP_KERNEL);
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if (!plat_dat) {
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pr_err("%s: ERROR: no memory", __func__);
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return -ENOMEM;
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}
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/* Set default value for multicast hash bins */
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plat_dat->multicast_filter_bins = HASH_TABLE_SIZE;
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/* Set default value for unicast filter entries */
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plat_dat->unicast_filter_entries = 1;
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if (pdev->dev.of_node) {
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ret = stmmac_probe_config_dt(pdev, plat_dat, &mac);
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if (ret) {
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pr_err("%s: main dt probe failed", __func__);
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return ret;
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}
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}
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/* Custom setup (if needed) */
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if (plat_dat->setup) {
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plat_dat->bsp_priv = plat_dat->setup(pdev);
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if (IS_ERR(plat_dat->bsp_priv))
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return PTR_ERR(plat_dat->bsp_priv);
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}
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/* Custom initialisation (if needed)*/
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if (plat_dat->init) {
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ret = plat_dat->init(pdev, plat_dat->bsp_priv);
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if (unlikely(ret))
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return ret;
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}
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priv = stmmac_dvr_probe(&(pdev->dev), plat_dat, addr);
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if (IS_ERR(priv)) {
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pr_err("%s: main driver probe failed", __func__);
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return PTR_ERR(priv);
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}
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/* Get MAC address if available (DT) */
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if (mac)
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memcpy(priv->dev->dev_addr, mac, ETH_ALEN);
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/* Get the MAC information */
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priv->dev->irq = platform_get_irq_byname(pdev, "macirq");
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if (priv->dev->irq < 0) {
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if (priv->dev->irq != -EPROBE_DEFER) {
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netdev_err(priv->dev,
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"MAC IRQ configuration information not found\n");
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}
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return priv->dev->irq;
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}
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/*
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* On some platforms e.g. SPEAr the wake up irq differs from the mac irq
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* The external wake up irq can be passed through the platform code
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* named as "eth_wake_irq"
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*
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* In case the wake up interrupt is not passed from the platform
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* so the driver will continue to use the mac irq (ndev->irq)
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*/
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priv->wol_irq = platform_get_irq_byname(pdev, "eth_wake_irq");
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if (priv->wol_irq < 0) {
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if (priv->wol_irq == -EPROBE_DEFER)
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return -EPROBE_DEFER;
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priv->wol_irq = priv->dev->irq;
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}
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priv->lpi_irq = platform_get_irq_byname(pdev, "eth_lpi");
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if (priv->lpi_irq == -EPROBE_DEFER)
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return -EPROBE_DEFER;
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platform_set_drvdata(pdev, priv->dev);
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pr_debug("STMMAC platform driver registration completed");
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return 0;
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}
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/**
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* stmmac_pltfr_remove
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* @pdev: platform device pointer
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* Description: this function calls the main to free the net resources
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* and calls the platforms hook and release the resources (e.g. mem).
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*/
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static int stmmac_pltfr_remove(struct platform_device *pdev)
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{
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struct net_device *ndev = platform_get_drvdata(pdev);
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struct stmmac_priv *priv = netdev_priv(ndev);
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int ret = stmmac_dvr_remove(ndev);
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if (priv->plat->exit)
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priv->plat->exit(pdev, priv->plat->bsp_priv);
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if (priv->plat->free)
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priv->plat->free(pdev, priv->plat->bsp_priv);
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return ret;
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}
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#ifdef CONFIG_PM
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static int stmmac_pltfr_suspend(struct device *dev)
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{
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int ret;
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struct net_device *ndev = dev_get_drvdata(dev);
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struct stmmac_priv *priv = netdev_priv(ndev);
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struct platform_device *pdev = to_platform_device(dev);
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ret = stmmac_suspend(ndev);
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if (priv->plat->exit)
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priv->plat->exit(pdev, priv->plat->bsp_priv);
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return ret;
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}
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static int stmmac_pltfr_resume(struct device *dev)
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{
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struct net_device *ndev = dev_get_drvdata(dev);
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struct stmmac_priv *priv = netdev_priv(ndev);
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struct platform_device *pdev = to_platform_device(dev);
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if (priv->plat->init)
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priv->plat->init(pdev, priv->plat->bsp_priv);
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return stmmac_resume(ndev);
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}
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#endif /* CONFIG_PM */
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static SIMPLE_DEV_PM_OPS(stmmac_pltfr_pm_ops,
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stmmac_pltfr_suspend, stmmac_pltfr_resume);
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struct platform_driver stmmac_pltfr_driver = {
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.probe = stmmac_pltfr_probe,
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.remove = stmmac_pltfr_remove,
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.driver = {
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.name = STMMAC_RESOURCE_NAME,
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.owner = THIS_MODULE,
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.pm = &stmmac_pltfr_pm_ops,
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.of_match_table = of_match_ptr(stmmac_dt_ids),
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},
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};
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MODULE_DESCRIPTION("STMMAC 10/100/1000 Ethernet PLATFORM driver");
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MODULE_AUTHOR("Giuseppe Cavallaro <peppe.cavallaro@st.com>");
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MODULE_LICENSE("GPL");
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