--- zzzz-none-000/linux-3.10.107/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c 2017-06-27 09:49:32.000000000 +0000 +++ scorpion-7490-727/linux-3.10.107/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c 2021-02-04 17:41:59.000000000 +0000 @@ -23,26 +23,167 @@ *******************************************************************************/ #include +#include #include #include #include +#include +#include + #include "stmmac.h" +#include "stmmac_platform.h" #ifdef CONFIG_OF -static int stmmac_probe_config_dt(struct platform_device *pdev, - struct plat_stmmacenet_data *plat, - const char **mac) + +/** + * 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. + */ +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; - if (!np) - return -ENODEV; + plat = devm_kzalloc(&pdev->dev, sizeof(*plat), GFP_KERNEL); + if (!plat) + return ERR_PTR(-ENOMEM); *mac = of_get_mac_address(np); + if (!*mac) { + u8 mtd_mac[ETH_ALEN]; + int ret; + + ret = of_get_mac_address_mtd(np, mtd_mac); + if (ret == -EPROBE_DEFER) + return ERR_PTR(ret); + + if (is_valid_ether_addr(mtd_mac)) + *mac = devm_kmemdup(&pdev->dev, mtd_mac, ETH_ALEN, + GFP_KERNEL); + } + plat->interface = of_get_phy_mode(np); - plat->mdio_bus_data = devm_kzalloc(&pdev->dev, - sizeof(struct stmmac_mdio_bus_data), - GFP_KERNEL); + + /* 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; + + /* If we find a phy-handle property, use it as the PHY */ + plat->phy_node = of_parse_phandle(np, "phy-handle", 0); + + /* If phy-handle is not specified, check if we have a fixed-phy */ + if (!plat->phy_node && of_phy_is_fixed_link(np)) { + if ((of_phy_register_fixed_link(np) < 0)) + return ERR_PTR(-ENODEV); + + plat->phy_node = of_node_get(np); + } + + /* "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_node || 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); + + 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"); + + /* 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 @@ -52,109 +193,110 @@ 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; } - return 0; + 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) { + of_node_put(np); + return ERR_PTR(-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"); + of_property_read_u32(np, "snps,burst_len", &dma_cfg->burst_len); + if (dma_cfg->burst_len < 0 || dma_cfg->burst_len > 256) + dma_cfg->burst_len = 0; + } + 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 ignored if force_thresh_dma_mode is set."); + } + + return plat; } #else -static int stmmac_probe_config_dt(struct platform_device *pdev, - struct plat_stmmacenet_data *plat, - const char **mac) +struct plat_stmmacenet_data * +stmmac_probe_config_dt(struct platform_device *pdev, const char **mac) { - return -ENOSYS; + return ERR_PTR(-ENOSYS); } #endif /* CONFIG_OF */ +EXPORT_SYMBOL_GPL(stmmac_probe_config_dt); -/** - * stmmac_pltfr_probe - * @pdev: platform device pointer - * Description: platform_device probe function. It allocates - * the necessary resources and invokes the main to init - * the net device, register the mdio bus etc. - */ -static int stmmac_pltfr_probe(struct platform_device *pdev) +int stmmac_get_platform_resources(struct platform_device *pdev, + struct stmmac_resources *stmmac_res) { - int ret = 0; struct resource *res; - struct device *dev = &pdev->dev; - void __iomem *addr = NULL; - struct stmmac_priv *priv = NULL; - struct plat_stmmacenet_data *plat_dat = NULL; - const char *mac = NULL; - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!res) - return -ENODEV; + memset(stmmac_res, 0, sizeof(*stmmac_res)); - addr = devm_ioremap_resource(dev, res); - if (IS_ERR(addr)) - return PTR_ERR(addr); - - if (pdev->dev.of_node) { - plat_dat = devm_kzalloc(&pdev->dev, - sizeof(struct plat_stmmacenet_data), - GFP_KERNEL); - if (!plat_dat) { - pr_err("%s: ERROR: no memory", __func__); - return -ENOMEM; - } - - ret = stmmac_probe_config_dt(pdev, plat_dat, &mac); - if (ret) { - pr_err("%s: main dt probe failed", __func__); - return ret; + /* 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) { + if (stmmac_res->irq != -EPROBE_DEFER) { + dev_err(&pdev->dev, + "MAC IRQ configuration information not found\n"); } - } else { - plat_dat = pdev->dev.platform_data; - } - - /* Custom initialisation (if needed)*/ - if (plat_dat->init) { - ret = plat_dat->init(pdev); - if (unlikely(ret)) - return ret; - } - - priv = stmmac_dvr_probe(&(pdev->dev), plat_dat, addr); - if (!priv) { - pr_err("%s: main driver probe failed", __func__); - return -ENODEV; - } - - /* Get MAC address if available (DT) */ - if (mac) - memcpy(priv->dev->dev_addr, mac, ETH_ALEN); - - /* Get the MAC information */ - priv->dev->irq = platform_get_irq_byname(pdev, "macirq"); - if (priv->dev->irq == -ENXIO) { - pr_err("%s: ERROR: MAC IRQ configuration " - "information not found\n", __func__); - return -ENXIO; + return stmmac_res->irq; } - /* - * On some platforms e.g. SPEAr the wake up irq differs from the mac 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) */ - priv->wol_irq = platform_get_irq_byname(pdev, "eth_wake_irq"); - if (priv->wol_irq == -ENXIO) - priv->wol_irq = priv->dev->irq; - - priv->lpi_irq = platform_get_irq_byname(pdev, "eth_lpi"); + 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; + } - platform_set_drvdata(pdev, priv->dev); + stmmac_res->lpi_irq = platform_get_irq_byname(pdev, "eth_lpi"); + if (stmmac_res->lpi_irq == -EPROBE_DEFER) + return -EPROBE_DEFER; - pr_debug("STMMAC platform driver registration completed"); + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + stmmac_res->addr = devm_ioremap_resource(&pdev->dev, res); - return 0; + return PTR_ERR_OR_ZERO(stmmac_res->addr); } +EXPORT_SYMBOL_GPL(stmmac_get_platform_resources); /** * stmmac_pltfr_remove @@ -162,91 +304,65 @@ * Description: this function calls the main to free the net resources * and calls the platforms hook and release the resources (e.g. mem). */ -static int stmmac_pltfr_remove(struct platform_device *pdev) +int stmmac_pltfr_remove(struct platform_device *pdev) { struct net_device *ndev = platform_get_drvdata(pdev); struct stmmac_priv *priv = netdev_priv(ndev); int ret = stmmac_dvr_remove(ndev); if (priv->plat->exit) - priv->plat->exit(pdev); - - platform_set_drvdata(pdev, NULL); + priv->plat->exit(pdev, priv->plat->bsp_priv); return ret; } +EXPORT_SYMBOL_GPL(stmmac_pltfr_remove); -#ifdef CONFIG_PM +#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) { - struct net_device *ndev = dev_get_drvdata(dev); - - return stmmac_suspend(ndev); -} - -static int stmmac_pltfr_resume(struct device *dev) -{ - struct net_device *ndev = dev_get_drvdata(dev); - - return stmmac_resume(ndev); -} - -int stmmac_pltfr_freeze(struct device *dev) -{ int ret; - struct plat_stmmacenet_data *plat_dat = dev_get_platdata(dev); 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_freeze(ndev); - if (plat_dat->exit) - plat_dat->exit(pdev); + ret = stmmac_suspend(ndev); + if (priv->plat->exit) + priv->plat->exit(pdev, priv->plat->bsp_priv); return ret; } -int stmmac_pltfr_restore(struct device *dev) +/** + * 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 plat_stmmacenet_data *plat_dat = dev_get_platdata(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 (plat_dat->init) - plat_dat->init(pdev); + if (priv->plat->init) + priv->plat->init(pdev, priv->plat->bsp_priv); - return stmmac_restore(ndev); + return stmmac_resume(ndev); } +#endif /* CONFIG_PM_SLEEP */ -static const struct dev_pm_ops stmmac_pltfr_pm_ops = { - .suspend = stmmac_pltfr_suspend, - .resume = stmmac_pltfr_resume, - .freeze = stmmac_pltfr_freeze, - .thaw = stmmac_pltfr_restore, - .restore = stmmac_pltfr_restore, -}; -#else -static const struct dev_pm_ops stmmac_pltfr_pm_ops; -#endif /* CONFIG_PM */ - -static const struct of_device_id stmmac_dt_ids[] = { - { .compatible = "st,spear600-gmac"}, - { .compatible = "snps,dwmac-3.70a"}, - { .compatible = "snps,dwmac"}, - { /* sentinel */ } -}; -MODULE_DEVICE_TABLE(of, stmmac_dt_ids); - -struct platform_driver stmmac_pltfr_driver = { - .probe = stmmac_pltfr_probe, - .remove = stmmac_pltfr_remove, - .driver = { - .name = STMMAC_RESOURCE_NAME, - .owner = THIS_MODULE, - .pm = &stmmac_pltfr_pm_ops, - .of_match_table = of_match_ptr(stmmac_dt_ids), - }, -}; +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 driver"); +MODULE_DESCRIPTION("STMMAC 10/100/1000 Ethernet platform support"); MODULE_AUTHOR("Giuseppe Cavallaro "); MODULE_LICENSE("GPL");