diff options
Diffstat (limited to 'drivers/net/ethernet/micrel/ks8851.c')
| -rw-r--r-- | drivers/net/ethernet/micrel/ks8851.c | 134 |
1 files changed, 98 insertions, 36 deletions
diff --git a/drivers/net/ethernet/micrel/ks8851.c b/drivers/net/ethernet/micrel/ks8851.c index 33bcb63d56a..66d4ab703f4 100644 --- a/drivers/net/ethernet/micrel/ks8851.c +++ b/drivers/net/ethernet/micrel/ks8851.c @@ -23,8 +23,11 @@ #include <linux/crc32.h> #include <linux/mii.h> #include <linux/eeprom_93cx6.h> +#include <linux/regulator/consumer.h> #include <linux/spi/spi.h> +#include <linux/gpio.h> +#include <linux/of_gpio.h> #include "ks8851.h" @@ -83,6 +86,9 @@ union ks8851_tx_hdr { * @rc_rxqcr: Cached copy of KS_RXQCR. * @eeprom_size: Companion eeprom size in Bytes, 0 if no eeprom * @eeprom: 93CX6 EEPROM state for accessing on-board EEPROM. + * @vdd_reg: Optional regulator supplying the chip + * @vdd_io: Optional digital power supply for IO + * @gpio: Optional reset_n gpio * * The @lock ensures that the chip is protected when certain operations are * in progress. When the read or write packet transfer is in progress, most @@ -130,6 +136,9 @@ struct ks8851_net { struct spi_transfer spi_xfer2[2]; struct eeprom_93cx6 eeprom; + struct regulator *vdd_reg; + struct regulator *vdd_io; + int gpio; }; static int msg_enable; @@ -528,7 +537,7 @@ static void ks8851_rx_pkts(struct ks8851_net *ks) for (; rxfc != 0; rxfc--) { rxh = ks8851_rdreg32(ks, KS_RXFHSR); rxstat = rxh & 0xffff; - rxlen = rxh >> 16; + rxlen = (rxh >> 16) & 0xfff; netif_dbg(ks, rx_status, ks->netdev, "rx: stat 0x%04x, len 0x%04x\n", rxstat, rxlen); @@ -1364,43 +1373,44 @@ static int ks8851_read_selftest(struct ks8851_net *ks) /* driver bus management functions */ -#ifdef CONFIG_PM -static int ks8851_suspend(struct spi_device *spi, pm_message_t state) +#ifdef CONFIG_PM_SLEEP + +static int ks8851_suspend(struct device *dev) { - struct ks8851_net *ks = dev_get_drvdata(&spi->dev); - struct net_device *dev = ks->netdev; + struct ks8851_net *ks = dev_get_drvdata(dev); + struct net_device *netdev = ks->netdev; - if (netif_running(dev)) { - netif_device_detach(dev); - ks8851_net_stop(dev); + if (netif_running(netdev)) { + netif_device_detach(netdev); + ks8851_net_stop(netdev); } return 0; } -static int ks8851_resume(struct spi_device *spi) +static int ks8851_resume(struct device *dev) { - struct ks8851_net *ks = dev_get_drvdata(&spi->dev); - struct net_device *dev = ks->netdev; + struct ks8851_net *ks = dev_get_drvdata(dev); + struct net_device *netdev = ks->netdev; - if (netif_running(dev)) { - ks8851_net_open(dev); - netif_device_attach(dev); + if (netif_running(netdev)) { + ks8851_net_open(netdev); + netif_device_attach(netdev); } return 0; } -#else -#define ks8851_suspend NULL -#define ks8851_resume NULL #endif +static SIMPLE_DEV_PM_OPS(ks8851_pm_ops, ks8851_suspend, ks8851_resume); + static int ks8851_probe(struct spi_device *spi) { struct net_device *ndev; struct ks8851_net *ks; int ret; unsigned cider; + int gpio; ndev = alloc_etherdev(sizeof(struct ks8851_net)); if (!ndev) @@ -1414,6 +1424,54 @@ static int ks8851_probe(struct spi_device *spi) ks->spidev = spi; ks->tx_space = 6144; + gpio = of_get_named_gpio_flags(spi->dev.of_node, "reset-gpios", + 0, NULL); + if (gpio == -EPROBE_DEFER) { + ret = gpio; + goto err_gpio; + } + + ks->gpio = gpio; + if (gpio_is_valid(gpio)) { + ret = devm_gpio_request_one(&spi->dev, gpio, + GPIOF_OUT_INIT_LOW, "ks8851_rst_n"); + if (ret) { + dev_err(&spi->dev, "reset gpio request failed\n"); + goto err_gpio; + } + } + + ks->vdd_io = devm_regulator_get(&spi->dev, "vdd-io"); + if (IS_ERR(ks->vdd_io)) { + ret = PTR_ERR(ks->vdd_io); + goto err_reg_io; + } + + ret = regulator_enable(ks->vdd_io); + if (ret) { + dev_err(&spi->dev, "regulator vdd_io enable fail: %d\n", + ret); + goto err_reg_io; + } + + ks->vdd_reg = devm_regulator_get(&spi->dev, "vdd"); + if (IS_ERR(ks->vdd_reg)) { + ret = PTR_ERR(ks->vdd_reg); + goto err_reg; + } + + ret = regulator_enable(ks->vdd_reg); + if (ret) { + dev_err(&spi->dev, "regulator vdd enable fail: %d\n", + ret); + goto err_reg; + } + + if (gpio_is_valid(gpio)) { + usleep_range(10000, 11000); + gpio_set_value(gpio, 1); + } + mutex_init(&ks->lock); spin_lock_init(&ks->statelock); @@ -1453,10 +1511,10 @@ static int ks8851_probe(struct spi_device *spi) skb_queue_head_init(&ks->txq); - SET_ETHTOOL_OPS(ndev, &ks8851_ethtool_ops); + ndev->ethtool_ops = &ks8851_ethtool_ops; SET_NETDEV_DEV(ndev, &spi->dev); - dev_set_drvdata(&spi->dev, ks); + spi_set_drvdata(spi, ks); ndev->if_port = IF_PORT_100BASET; ndev->netdev_ops = &ks8851_netdev_ops; @@ -1508,49 +1566,53 @@ static int ks8851_probe(struct spi_device *spi) err_netdev: free_irq(ndev->irq, ks); -err_id: err_irq: + if (gpio_is_valid(gpio)) + gpio_set_value(gpio, 0); +err_id: + regulator_disable(ks->vdd_reg); +err_reg: + regulator_disable(ks->vdd_io); +err_reg_io: +err_gpio: free_netdev(ndev); return ret; } static int ks8851_remove(struct spi_device *spi) { - struct ks8851_net *priv = dev_get_drvdata(&spi->dev); + struct ks8851_net *priv = spi_get_drvdata(spi); if (netif_msg_drv(priv)) dev_info(&spi->dev, "remove\n"); unregister_netdev(priv->netdev); free_irq(spi->irq, priv); + if (gpio_is_valid(priv->gpio)) + gpio_set_value(priv->gpio, 0); + regulator_disable(priv->vdd_reg); + regulator_disable(priv->vdd_io); free_netdev(priv->netdev); return 0; } +static const struct of_device_id ks8851_match_table[] = { + { .compatible = "micrel,ks8851" }, + { } +}; + static struct spi_driver ks8851_driver = { .driver = { .name = "ks8851", + .of_match_table = ks8851_match_table, .owner = THIS_MODULE, + .pm = &ks8851_pm_ops, }, .probe = ks8851_probe, .remove = ks8851_remove, - .suspend = ks8851_suspend, - .resume = ks8851_resume, }; - -static int __init ks8851_init(void) -{ - return spi_register_driver(&ks8851_driver); -} - -static void __exit ks8851_exit(void) -{ - spi_unregister_driver(&ks8851_driver); -} - -module_init(ks8851_init); -module_exit(ks8851_exit); +module_spi_driver(ks8851_driver); MODULE_DESCRIPTION("KS8851 Network driver"); MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>"); |