forked from Minki/linux
85d89e6115
As all dwmac-* drivers now have their own probe function move the common one into dwmac-generic driver and drop the EXPORT. Signed-off-by: Joachim Eastwood <manabian@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
373 lines
11 KiB
C
373 lines
11 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/module.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 <linux/of_mdio.h>
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#include "stmmac.h"
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#include "stmmac_platform.h"
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#ifdef CONFIG_OF
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/**
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* dwmac1000_validate_mcast_bins - validates the number of Multicast filter bins
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* @mcast_bins: Multicast filtering bins
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* Description:
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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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/**
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* dwmac1000_validate_ucast_entries - validate the Unicast address entries
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* @ucast_entries: number of Unicast address entries
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* Description:
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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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/**
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* stmmac_probe_config_dt - parse device-tree driver parameters
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* @pdev: platform_device structure
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* @plat: driver data platform structure
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* @mac: MAC address to use
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* Description:
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* this function is to read the driver parameters from device-tree and
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* set some private fields that will be used by the main at runtime.
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*/
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struct plat_stmmacenet_data *
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stmmac_probe_config_dt(struct platform_device *pdev, const char **mac)
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{
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struct device_node *np = pdev->dev.of_node;
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struct plat_stmmacenet_data *plat;
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const struct stmmac_of_data *data;
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struct stmmac_dma_cfg *dma_cfg;
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plat = devm_kzalloc(&pdev->dev, sizeof(*plat), GFP_KERNEL);
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if (!plat)
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return ERR_PTR(-ENOMEM);
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data = of_device_get_match_data(&pdev->dev);
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if (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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/* If we find a phy-handle property, use it as the PHY */
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plat->phy_node = of_parse_phandle(np, "phy-handle", 0);
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/* If phy-handle is not specified, check if we have a fixed-phy */
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if (!plat->phy_node && of_phy_is_fixed_link(np)) {
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if ((of_phy_register_fixed_link(np) < 0))
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return ERR_PTR(-ENODEV);
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plat->phy_node = of_node_get(np);
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}
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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_node || 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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of_property_read_u32(np, "tx-fifo-depth", &plat->tx_fifo_size);
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of_property_read_u32(np, "rx-fifo-depth", &plat->rx_fifo_size);
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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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/* Set default value for multicast hash bins */
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plat->multicast_filter_bins = HASH_TABLE_SIZE;
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/* Set default value for unicast filter entries */
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plat->unicast_filter_entries = 1;
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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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of_node_put(np);
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return ERR_PTR(-ENOMEM);
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}
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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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of_property_read_u32(np, "snps,burst_len", &dma_cfg->burst_len);
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if (dma_cfg->burst_len < 0 || dma_cfg->burst_len > 256)
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dma_cfg->burst_len = 0;
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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 plat;
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}
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#else
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struct plat_stmmacenet_data *
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stmmac_probe_config_dt(struct platform_device *pdev, const char **mac)
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{
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return ERR_PTR(-ENOSYS);
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}
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#endif /* CONFIG_OF */
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EXPORT_SYMBOL_GPL(stmmac_probe_config_dt);
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int stmmac_get_platform_resources(struct platform_device *pdev,
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struct stmmac_resources *stmmac_res)
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{
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struct resource *res;
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memset(stmmac_res, 0, sizeof(*stmmac_res));
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/* Get IRQ information early to have an ability to ask for deferred
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* probe if needed before we went too far with resource allocation.
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*/
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stmmac_res->irq = platform_get_irq_byname(pdev, "macirq");
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if (stmmac_res->irq < 0) {
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if (stmmac_res->irq != -EPROBE_DEFER) {
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dev_err(&pdev->dev,
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"MAC IRQ configuration information not found\n");
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}
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return stmmac_res->irq;
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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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stmmac_res->wol_irq = platform_get_irq_byname(pdev, "eth_wake_irq");
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if (stmmac_res->wol_irq < 0) {
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if (stmmac_res->wol_irq == -EPROBE_DEFER)
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return -EPROBE_DEFER;
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stmmac_res->wol_irq = stmmac_res->irq;
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}
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stmmac_res->lpi_irq = platform_get_irq_byname(pdev, "eth_lpi");
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if (stmmac_res->lpi_irq == -EPROBE_DEFER)
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return -EPROBE_DEFER;
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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stmmac_res->addr = devm_ioremap_resource(&pdev->dev, res);
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return PTR_ERR_OR_ZERO(stmmac_res->addr);
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}
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EXPORT_SYMBOL_GPL(stmmac_get_platform_resources);
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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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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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EXPORT_SYMBOL_GPL(stmmac_pltfr_remove);
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#ifdef CONFIG_PM_SLEEP
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/**
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* stmmac_pltfr_suspend
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* @dev: device pointer
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* Description: this function is invoked when suspend the driver and it direcly
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* call the main suspend function and then, if required, on some platform, it
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* can call an exit helper.
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*/
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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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/**
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* stmmac_pltfr_resume
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* @dev: device pointer
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* Description: this function is invoked when resume the driver before calling
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* the main resume function, on some platforms, it can call own init helper
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* if required.
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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_SLEEP */
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SIMPLE_DEV_PM_OPS(stmmac_pltfr_pm_ops, stmmac_pltfr_suspend,
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stmmac_pltfr_resume);
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EXPORT_SYMBOL_GPL(stmmac_pltfr_pm_ops);
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