268 lines
7.0 KiB
C
268 lines
7.0 KiB
C
/*******************************************************************************
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This contains the functions to handle the pci driver.
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Copyright (C) 2011-2012 Vayavya Labs Pvt 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: Rayagond Kokatanur <rayagond@vayavyalabs.com>
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Author: Giuseppe Cavallaro <peppe.cavallaro@st.com>
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*******************************************************************************/
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#include <linux/pci.h>
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#include <linux/dmi.h>
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#include "stmmac.h"
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/*
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* This struct is used to associate PCI Function of MAC controller on a board,
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* discovered via DMI, with the address of PHY connected to the MAC. The
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* negative value of the address means that MAC controller is not connected
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* with PHY.
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*/
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struct stmmac_pci_dmi_data {
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const char *name;
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unsigned int func;
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int phy_addr;
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};
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struct stmmac_pci_info {
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struct pci_dev *pdev;
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int (*setup)(struct plat_stmmacenet_data *plat,
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struct stmmac_pci_info *info);
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struct stmmac_pci_dmi_data *dmi;
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};
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static int stmmac_pci_find_phy_addr(struct stmmac_pci_info *info)
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{
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const char *name = dmi_get_system_info(DMI_BOARD_NAME);
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unsigned int func = PCI_FUNC(info->pdev->devfn);
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struct stmmac_pci_dmi_data *dmi;
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/*
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* Galileo boards with old firmware don't support DMI. We always return
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* 1 here, so at least first found MAC controller would be probed.
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*/
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if (!name)
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return 1;
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for (dmi = info->dmi; dmi->name && *dmi->name; dmi++) {
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if (!strcmp(dmi->name, name) && dmi->func == func)
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return dmi->phy_addr;
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}
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return -ENODEV;
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}
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static void stmmac_default_data(struct plat_stmmacenet_data *plat)
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{
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plat->bus_id = 1;
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plat->phy_addr = 0;
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plat->interface = PHY_INTERFACE_MODE_GMII;
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plat->clk_csr = 2; /* clk_csr_i = 20-35MHz & MDC = clk_csr_i/16 */
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plat->has_gmac = 1;
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plat->force_sf_dma_mode = 1;
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plat->mdio_bus_data->phy_reset = NULL;
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plat->mdio_bus_data->phy_mask = 0;
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plat->dma_cfg->pbl = 32;
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/* TODO: AXI */
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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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static int quark_default_data(struct plat_stmmacenet_data *plat,
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struct stmmac_pci_info *info)
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{
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struct pci_dev *pdev = info->pdev;
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int ret;
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/*
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* Refuse to load the driver and register net device if MAC controller
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* does not connect to any PHY interface.
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*/
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ret = stmmac_pci_find_phy_addr(info);
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if (ret < 0)
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return ret;
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plat->bus_id = PCI_DEVID(pdev->bus->number, pdev->devfn);
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plat->phy_addr = ret;
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plat->interface = PHY_INTERFACE_MODE_RMII;
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plat->clk_csr = 2;
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plat->has_gmac = 1;
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plat->force_sf_dma_mode = 1;
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plat->mdio_bus_data->phy_reset = NULL;
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plat->mdio_bus_data->phy_mask = 0;
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plat->dma_cfg->pbl = 16;
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plat->dma_cfg->fixed_burst = 1;
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/* AXI (TODO) */
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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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return 0;
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}
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static struct stmmac_pci_dmi_data quark_pci_dmi_data[] = {
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{
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.name = "Galileo",
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.func = 6,
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.phy_addr = 1,
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},
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{
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.name = "GalileoGen2",
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.func = 6,
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.phy_addr = 1,
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},
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{}
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};
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static struct stmmac_pci_info quark_pci_info = {
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.setup = quark_default_data,
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.dmi = quark_pci_dmi_data,
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};
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/**
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* stmmac_pci_probe
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*
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* @pdev: pci device pointer
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* @id: pointer to table of device id/id's.
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*
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* Description: This probing function gets called for all PCI devices which
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* match the ID table and are not "owned" by other driver yet. This function
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* gets passed a "struct pci_dev *" for each device whose entry in the ID table
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* matches the device. The probe functions returns zero when the driver choose
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* to take "ownership" of the device or an error code(-ve no) otherwise.
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*/
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static int stmmac_pci_probe(struct pci_dev *pdev,
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const struct pci_device_id *id)
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{
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struct stmmac_pci_info *info = (struct stmmac_pci_info *)id->driver_data;
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struct plat_stmmacenet_data *plat;
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struct stmmac_resources res;
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int i;
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int ret;
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plat = devm_kzalloc(&pdev->dev, sizeof(*plat), GFP_KERNEL);
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if (!plat)
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return -ENOMEM;
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plat->mdio_bus_data = devm_kzalloc(&pdev->dev,
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sizeof(*plat->mdio_bus_data),
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GFP_KERNEL);
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if (!plat->mdio_bus_data)
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return -ENOMEM;
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plat->dma_cfg = devm_kzalloc(&pdev->dev, sizeof(*plat->dma_cfg),
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GFP_KERNEL);
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if (!plat->dma_cfg)
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return -ENOMEM;
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/* Enable pci device */
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ret = pcim_enable_device(pdev);
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if (ret) {
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dev_err(&pdev->dev, "%s: ERROR: failed to enable device\n",
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__func__);
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return ret;
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}
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/* Get the base address of device */
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for (i = 0; i <= PCI_STD_RESOURCE_END; i++) {
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if (pci_resource_len(pdev, i) == 0)
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continue;
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ret = pcim_iomap_regions(pdev, BIT(i), pci_name(pdev));
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if (ret)
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return ret;
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break;
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}
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pci_set_master(pdev);
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if (info) {
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info->pdev = pdev;
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if (info->setup) {
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ret = info->setup(plat, info);
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if (ret)
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return ret;
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}
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} else
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stmmac_default_data(plat);
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pci_enable_msi(pdev);
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memset(&res, 0, sizeof(res));
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res.addr = pcim_iomap_table(pdev)[i];
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res.wol_irq = pdev->irq;
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res.irq = pdev->irq;
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return stmmac_dvr_probe(&pdev->dev, plat, &res);
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}
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/**
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* stmmac_pci_remove
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*
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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 releases the PCI resources.
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*/
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static void stmmac_pci_remove(struct pci_dev *pdev)
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{
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stmmac_dvr_remove(&pdev->dev);
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}
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static SIMPLE_DEV_PM_OPS(stmmac_pm_ops, stmmac_suspend, stmmac_resume);
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#define STMMAC_VENDOR_ID 0x700
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#define STMMAC_QUARK_ID 0x0937
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#define STMMAC_DEVICE_ID 0x1108
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static const struct pci_device_id stmmac_id_table[] = {
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{PCI_DEVICE(STMMAC_VENDOR_ID, STMMAC_DEVICE_ID)},
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{PCI_DEVICE(PCI_VENDOR_ID_STMICRO, PCI_DEVICE_ID_STMICRO_MAC)},
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{PCI_VDEVICE(INTEL, STMMAC_QUARK_ID), (kernel_ulong_t)&quark_pci_info},
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{}
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};
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MODULE_DEVICE_TABLE(pci, stmmac_id_table);
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static struct pci_driver stmmac_pci_driver = {
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.name = STMMAC_RESOURCE_NAME,
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.id_table = stmmac_id_table,
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.probe = stmmac_pci_probe,
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.remove = stmmac_pci_remove,
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.driver = {
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.pm = &stmmac_pm_ops,
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},
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};
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module_pci_driver(stmmac_pci_driver);
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MODULE_DESCRIPTION("STMMAC 10/100/1000 Ethernet PCI driver");
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MODULE_AUTHOR("Rayagond Kokatanur <rayagond.kokatanur@vayavyalabs.com>");
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MODULE_AUTHOR("Giuseppe Cavallaro <peppe.cavallaro@st.com>");
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MODULE_LICENSE("GPL");
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