diff options
Diffstat (limited to 'kernel/drivers/net/ethernet/netx-eth.c')
| -rw-r--r-- | kernel/drivers/net/ethernet/netx-eth.c | 505 |
1 files changed, 505 insertions, 0 deletions
diff --git a/kernel/drivers/net/ethernet/netx-eth.c b/kernel/drivers/net/ethernet/netx-eth.c new file mode 100644 index 000000000..9fbc30264 --- /dev/null +++ b/kernel/drivers/net/ethernet/netx-eth.c @@ -0,0 +1,505 @@ +/* + * drivers/net/ethernet/netx-eth.c + * + * Copyright (c) 2005 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 + * as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see <http://www.gnu.org/licenses/>. + */ + +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/delay.h> + +#include <linux/netdevice.h> +#include <linux/platform_device.h> +#include <linux/etherdevice.h> +#include <linux/skbuff.h> +#include <linux/mii.h> + +#include <asm/io.h> +#include <mach/hardware.h> +#include <mach/netx-regs.h> +#include <mach/pfifo.h> +#include <mach/xc.h> +#include <linux/platform_data/eth-netx.h> + +/* XC Fifo Offsets */ +#define EMPTY_PTR_FIFO(xcno) (0 + ((xcno) << 3)) /* Index of the empty pointer FIFO */ +#define IND_FIFO_PORT_HI(xcno) (1 + ((xcno) << 3)) /* Index of the FIFO where received */ + /* Data packages are indicated by XC */ +#define IND_FIFO_PORT_LO(xcno) (2 + ((xcno) << 3)) /* Index of the FIFO where received */ + /* Data packages are indicated by XC */ +#define REQ_FIFO_PORT_HI(xcno) (3 + ((xcno) << 3)) /* Index of the FIFO where Data packages */ + /* have to be indicated by ARM which */ + /* shall be sent */ +#define REQ_FIFO_PORT_LO(xcno) (4 + ((xcno) << 3)) /* Index of the FIFO where Data packages */ + /* have to be indicated by ARM which shall */ + /* be sent */ +#define CON_FIFO_PORT_HI(xcno) (5 + ((xcno) << 3)) /* Index of the FIFO where sent Data packages */ + /* are confirmed */ +#define CON_FIFO_PORT_LO(xcno) (6 + ((xcno) << 3)) /* Index of the FIFO where sent Data */ + /* packages are confirmed */ +#define PFIFO_MASK(xcno) (0x7f << (xcno*8)) + +#define FIFO_PTR_FRAMELEN_SHIFT 0 +#define FIFO_PTR_FRAMELEN_MASK (0x7ff << 0) +#define FIFO_PTR_FRAMELEN(len) (((len) << 0) & FIFO_PTR_FRAMELEN_MASK) +#define FIFO_PTR_TIMETRIG (1<<11) +#define FIFO_PTR_MULTI_REQ +#define FIFO_PTR_ORIGIN (1<<14) +#define FIFO_PTR_VLAN (1<<15) +#define FIFO_PTR_FRAMENO_SHIFT 16 +#define FIFO_PTR_FRAMENO_MASK (0x3f << 16) +#define FIFO_PTR_FRAMENO(no) (((no) << 16) & FIFO_PTR_FRAMENO_MASK) +#define FIFO_PTR_SEGMENT_SHIFT 22 +#define FIFO_PTR_SEGMENT_MASK (0xf << 22) +#define FIFO_PTR_SEGMENT(seg) (((seg) & 0xf) << 22) +#define FIFO_PTR_ERROR_SHIFT 28 +#define FIFO_PTR_ERROR_MASK (0xf << 28) + +#define ISR_LINK_STATUS_CHANGE (1<<4) +#define ISR_IND_LO (1<<3) +#define ISR_CON_LO (1<<2) +#define ISR_IND_HI (1<<1) +#define ISR_CON_HI (1<<0) + +#define ETH_MAC_LOCAL_CONFIG 0x1560 +#define ETH_MAC_4321 0x1564 +#define ETH_MAC_65 0x1568 + +#define MAC_TRAFFIC_CLASS_ARRANGEMENT_SHIFT 16 +#define MAC_TRAFFIC_CLASS_ARRANGEMENT_MASK (0xf<<MAC_TRAFFIC_CLASS_ARRANGEMENT_SHIFT) +#define MAC_TRAFFIC_CLASS_ARRANGEMENT(x) (((x)<<MAC_TRAFFIC_CLASS_ARRANGEMENT_SHIFT) & MAC_TRAFFIC_CLASS_ARRANGEMENT_MASK) +#define LOCAL_CONFIG_LINK_STATUS_IRQ_EN (1<<24) +#define LOCAL_CONFIG_CON_LO_IRQ_EN (1<<23) +#define LOCAL_CONFIG_CON_HI_IRQ_EN (1<<22) +#define LOCAL_CONFIG_IND_LO_IRQ_EN (1<<21) +#define LOCAL_CONFIG_IND_HI_IRQ_EN (1<<20) + +#define CARDNAME "netx-eth" + +/* LSB must be zero */ +#define INTERNAL_PHY_ADR 0x1c + +struct netx_eth_priv { + void __iomem *sram_base, *xpec_base, *xmac_base; + int id; + struct mii_if_info mii; + u32 msg_enable; + struct xc *xc; + spinlock_t lock; +}; + +static void netx_eth_set_multicast_list(struct net_device *ndev) +{ + /* implement me */ +} + +static int +netx_eth_hard_start_xmit(struct sk_buff *skb, struct net_device *ndev) +{ + struct netx_eth_priv *priv = netdev_priv(ndev); + unsigned char *buf = skb->data; + unsigned int len = skb->len; + + spin_lock_irq(&priv->lock); + memcpy_toio(priv->sram_base + 1560, (void *)buf, len); + if (len < 60) { + memset_io(priv->sram_base + 1560 + len, 0, 60 - len); + len = 60; + } + + pfifo_push(REQ_FIFO_PORT_LO(priv->id), + FIFO_PTR_SEGMENT(priv->id) | + FIFO_PTR_FRAMENO(1) | + FIFO_PTR_FRAMELEN(len)); + + ndev->stats.tx_packets++; + ndev->stats.tx_bytes += skb->len; + + netif_stop_queue(ndev); + spin_unlock_irq(&priv->lock); + dev_kfree_skb(skb); + + return NETDEV_TX_OK; +} + +static void netx_eth_receive(struct net_device *ndev) +{ + struct netx_eth_priv *priv = netdev_priv(ndev); + unsigned int val, frameno, seg, len; + unsigned char *data; + struct sk_buff *skb; + + val = pfifo_pop(IND_FIFO_PORT_LO(priv->id)); + + frameno = (val & FIFO_PTR_FRAMENO_MASK) >> FIFO_PTR_FRAMENO_SHIFT; + seg = (val & FIFO_PTR_SEGMENT_MASK) >> FIFO_PTR_SEGMENT_SHIFT; + len = (val & FIFO_PTR_FRAMELEN_MASK) >> FIFO_PTR_FRAMELEN_SHIFT; + + skb = netdev_alloc_skb(ndev, len); + if (unlikely(skb == NULL)) { + ndev->stats.rx_dropped++; + return; + } + + data = skb_put(skb, len); + + memcpy_fromio(data, priv->sram_base + frameno * 1560, len); + + pfifo_push(EMPTY_PTR_FIFO(priv->id), + FIFO_PTR_SEGMENT(seg) | FIFO_PTR_FRAMENO(frameno)); + + skb->protocol = eth_type_trans(skb, ndev); + netif_rx(skb); + ndev->stats.rx_packets++; + ndev->stats.rx_bytes += len; +} + +static irqreturn_t +netx_eth_interrupt(int irq, void *dev_id) +{ + struct net_device *ndev = dev_id; + struct netx_eth_priv *priv = netdev_priv(ndev); + int status; + unsigned long flags; + + spin_lock_irqsave(&priv->lock, flags); + + status = readl(NETX_PFIFO_XPEC_ISR(priv->id)); + while (status) { + int fill_level; + writel(status, NETX_PFIFO_XPEC_ISR(priv->id)); + + if ((status & ISR_CON_HI) || (status & ISR_IND_HI)) + printk("%s: unexpected status: 0x%08x\n", + __func__, status); + + fill_level = + readl(NETX_PFIFO_FILL_LEVEL(IND_FIFO_PORT_LO(priv->id))); + while (fill_level--) + netx_eth_receive(ndev); + + if (status & ISR_CON_LO) + netif_wake_queue(ndev); + + if (status & ISR_LINK_STATUS_CHANGE) + mii_check_media(&priv->mii, netif_msg_link(priv), 1); + + status = readl(NETX_PFIFO_XPEC_ISR(priv->id)); + } + spin_unlock_irqrestore(&priv->lock, flags); + return IRQ_HANDLED; +} + +static int netx_eth_open(struct net_device *ndev) +{ + struct netx_eth_priv *priv = netdev_priv(ndev); + + if (request_irq + (ndev->irq, netx_eth_interrupt, IRQF_SHARED, ndev->name, ndev)) + return -EAGAIN; + + writel(ndev->dev_addr[0] | + ndev->dev_addr[1]<<8 | + ndev->dev_addr[2]<<16 | + ndev->dev_addr[3]<<24, + priv->xpec_base + NETX_XPEC_RAM_START_OFS + ETH_MAC_4321); + writel(ndev->dev_addr[4] | + ndev->dev_addr[5]<<8, + priv->xpec_base + NETX_XPEC_RAM_START_OFS + ETH_MAC_65); + + writel(LOCAL_CONFIG_LINK_STATUS_IRQ_EN | + LOCAL_CONFIG_CON_LO_IRQ_EN | + LOCAL_CONFIG_CON_HI_IRQ_EN | + LOCAL_CONFIG_IND_LO_IRQ_EN | + LOCAL_CONFIG_IND_HI_IRQ_EN, + priv->xpec_base + NETX_XPEC_RAM_START_OFS + + ETH_MAC_LOCAL_CONFIG); + + mii_check_media(&priv->mii, netif_msg_link(priv), 1); + netif_start_queue(ndev); + + return 0; +} + +static int netx_eth_close(struct net_device *ndev) +{ + struct netx_eth_priv *priv = netdev_priv(ndev); + + netif_stop_queue(ndev); + + writel(0, + priv->xpec_base + NETX_XPEC_RAM_START_OFS + ETH_MAC_LOCAL_CONFIG); + + free_irq(ndev->irq, ndev); + + return 0; +} + +static void netx_eth_timeout(struct net_device *ndev) +{ + struct netx_eth_priv *priv = netdev_priv(ndev); + int i; + + printk(KERN_ERR "%s: transmit timed out, resetting\n", ndev->name); + + spin_lock_irq(&priv->lock); + + xc_reset(priv->xc); + xc_start(priv->xc); + + for (i=2; i<=18; i++) + pfifo_push(EMPTY_PTR_FIFO(priv->id), + FIFO_PTR_FRAMENO(i) | FIFO_PTR_SEGMENT(priv->id)); + + spin_unlock_irq(&priv->lock); + + netif_wake_queue(ndev); +} + +static int +netx_eth_phy_read(struct net_device *ndev, int phy_id, int reg) +{ + unsigned int val; + + val = MIIMU_SNRDY | MIIMU_PREAMBLE | MIIMU_PHYADDR(phy_id) | + MIIMU_REGADDR(reg) | MIIMU_PHY_NRES; + + writel(val, NETX_MIIMU); + while (readl(NETX_MIIMU) & MIIMU_SNRDY); + + return readl(NETX_MIIMU) >> 16; + +} + +static void +netx_eth_phy_write(struct net_device *ndev, int phy_id, int reg, int value) +{ + unsigned int val; + + val = MIIMU_SNRDY | MIIMU_PREAMBLE | MIIMU_PHYADDR(phy_id) | + MIIMU_REGADDR(reg) | MIIMU_PHY_NRES | MIIMU_OPMODE_WRITE | + MIIMU_DATA(value); + + writel(val, NETX_MIIMU); + while (readl(NETX_MIIMU) & MIIMU_SNRDY); +} + +static const struct net_device_ops netx_eth_netdev_ops = { + .ndo_open = netx_eth_open, + .ndo_stop = netx_eth_close, + .ndo_start_xmit = netx_eth_hard_start_xmit, + .ndo_tx_timeout = netx_eth_timeout, + .ndo_set_rx_mode = netx_eth_set_multicast_list, + .ndo_change_mtu = eth_change_mtu, + .ndo_validate_addr = eth_validate_addr, + .ndo_set_mac_address = eth_mac_addr, +}; + +static int netx_eth_enable(struct net_device *ndev) +{ + struct netx_eth_priv *priv = netdev_priv(ndev); + unsigned int mac4321, mac65; + int running, i; + + ndev->netdev_ops = &netx_eth_netdev_ops; + ndev->watchdog_timeo = msecs_to_jiffies(5000); + + priv->msg_enable = NETIF_MSG_LINK; + priv->mii.phy_id_mask = 0x1f; + priv->mii.reg_num_mask = 0x1f; + priv->mii.force_media = 0; + priv->mii.full_duplex = 0; + priv->mii.dev = ndev; + priv->mii.mdio_read = netx_eth_phy_read; + priv->mii.mdio_write = netx_eth_phy_write; + priv->mii.phy_id = INTERNAL_PHY_ADR + priv->id; + + running = xc_running(priv->xc); + xc_stop(priv->xc); + + /* if the xc engine is already running, assume the bootloader has + * loaded the firmware for us + */ + if (running) { + /* get Node Address from hardware */ + mac4321 = readl(priv->xpec_base + + NETX_XPEC_RAM_START_OFS + ETH_MAC_4321); + mac65 = readl(priv->xpec_base + + NETX_XPEC_RAM_START_OFS + ETH_MAC_65); + + ndev->dev_addr[0] = mac4321 & 0xff; + ndev->dev_addr[1] = (mac4321 >> 8) & 0xff; + ndev->dev_addr[2] = (mac4321 >> 16) & 0xff; + ndev->dev_addr[3] = (mac4321 >> 24) & 0xff; + ndev->dev_addr[4] = mac65 & 0xff; + ndev->dev_addr[5] = (mac65 >> 8) & 0xff; + } else { + if (xc_request_firmware(priv->xc)) { + printk(CARDNAME ": requesting firmware failed\n"); + return -ENODEV; + } + } + + xc_reset(priv->xc); + xc_start(priv->xc); + + if (!is_valid_ether_addr(ndev->dev_addr)) + printk("%s: Invalid ethernet MAC address. Please " + "set using ifconfig\n", ndev->name); + + for (i=2; i<=18; i++) + pfifo_push(EMPTY_PTR_FIFO(priv->id), + FIFO_PTR_FRAMENO(i) | FIFO_PTR_SEGMENT(priv->id)); + + return register_netdev(ndev); + +} + +static int netx_eth_drv_probe(struct platform_device *pdev) +{ + struct netx_eth_priv *priv; + struct net_device *ndev; + struct netxeth_platform_data *pdata; + int ret; + + ndev = alloc_etherdev(sizeof (struct netx_eth_priv)); + if (!ndev) { + ret = -ENOMEM; + goto exit; + } + SET_NETDEV_DEV(ndev, &pdev->dev); + + platform_set_drvdata(pdev, ndev); + + priv = netdev_priv(ndev); + + pdata = dev_get_platdata(&pdev->dev); + priv->xc = request_xc(pdata->xcno, &pdev->dev); + if (!priv->xc) { + dev_err(&pdev->dev, "unable to request xc engine\n"); + ret = -ENODEV; + goto exit_free_netdev; + } + + ndev->irq = priv->xc->irq; + priv->id = pdev->id; + priv->xpec_base = priv->xc->xpec_base; + priv->xmac_base = priv->xc->xmac_base; + priv->sram_base = priv->xc->sram_base; + + spin_lock_init(&priv->lock); + + ret = pfifo_request(PFIFO_MASK(priv->id)); + if (ret) { + printk("unable to request PFIFO\n"); + goto exit_free_xc; + } + + ret = netx_eth_enable(ndev); + if (ret) + goto exit_free_pfifo; + + return 0; +exit_free_pfifo: + pfifo_free(PFIFO_MASK(priv->id)); +exit_free_xc: + free_xc(priv->xc); +exit_free_netdev: + free_netdev(ndev); +exit: + return ret; +} + +static int netx_eth_drv_remove(struct platform_device *pdev) +{ + struct net_device *ndev = platform_get_drvdata(pdev); + struct netx_eth_priv *priv = netdev_priv(ndev); + + unregister_netdev(ndev); + xc_stop(priv->xc); + free_xc(priv->xc); + free_netdev(ndev); + pfifo_free(PFIFO_MASK(priv->id)); + + return 0; +} + +static int netx_eth_drv_suspend(struct platform_device *pdev, pm_message_t state) +{ + dev_err(&pdev->dev, "suspend not implemented\n"); + return 0; +} + +static int netx_eth_drv_resume(struct platform_device *pdev) +{ + dev_err(&pdev->dev, "resume not implemented\n"); + return 0; +} + +static struct platform_driver netx_eth_driver = { + .probe = netx_eth_drv_probe, + .remove = netx_eth_drv_remove, + .suspend = netx_eth_drv_suspend, + .resume = netx_eth_drv_resume, + .driver = { + .name = CARDNAME, + }, +}; + +static int __init netx_eth_init(void) +{ + unsigned int phy_control, val; + + printk("NetX Ethernet driver\n"); + + phy_control = PHY_CONTROL_PHY_ADDRESS(INTERNAL_PHY_ADR>>1) | + PHY_CONTROL_PHY1_MODE(PHY_MODE_ALL) | + PHY_CONTROL_PHY1_AUTOMDIX | + PHY_CONTROL_PHY1_EN | + PHY_CONTROL_PHY0_MODE(PHY_MODE_ALL) | + PHY_CONTROL_PHY0_AUTOMDIX | + PHY_CONTROL_PHY0_EN | + PHY_CONTROL_CLK_XLATIN; + + val = readl(NETX_SYSTEM_IOC_ACCESS_KEY); + writel(val, NETX_SYSTEM_IOC_ACCESS_KEY); + + writel(phy_control | PHY_CONTROL_RESET, NETX_SYSTEM_PHY_CONTROL); + udelay(100); + + val = readl(NETX_SYSTEM_IOC_ACCESS_KEY); + writel(val, NETX_SYSTEM_IOC_ACCESS_KEY); + + writel(phy_control, NETX_SYSTEM_PHY_CONTROL); + + return platform_driver_register(&netx_eth_driver); +} + +static void __exit netx_eth_cleanup(void) +{ + platform_driver_unregister(&netx_eth_driver); +} + +module_init(netx_eth_init); +module_exit(netx_eth_cleanup); + +MODULE_AUTHOR("Sascha Hauer, Pengutronix"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:" CARDNAME); +MODULE_FIRMWARE("xc0.bin"); +MODULE_FIRMWARE("xc1.bin"); +MODULE_FIRMWARE("xc2.bin"); |