--- /dev/null
+/*
+ * drivers/net/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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <linux/config.h>
+#include <linux/init.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 <asm/hardware.h>
+#include <asm/arch/hardware.h>
+#include <asm/arch/netx-regs.h>
+#include <asm/arch/pfifo.h>
+#include <asm/arch/xc.h>
+#include <asm/arch/eth.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 net_device_stats stats;
+ 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->trans_start = jiffies;
+ priv->stats.tx_packets++;
+ priv->stats.tx_bytes += skb->len;
+
+ netif_stop_queue(ndev);
+ spin_unlock_irq(&priv->lock);
+ dev_kfree_skb(skb);
+
+ return 0;
+}
+
+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 = dev_alloc_skb(len);
+ if (unlikely(skb == NULL)) {
+ printk(KERN_NOTICE "%s: Low memory, packet dropped.\n",
+ ndev->name);
+ priv->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));
+
+ ndev->last_rx = jiffies;
+ skb->dev = ndev;
+ skb->protocol = eth_type_trans(skb, ndev);
+ netif_rx(skb);
+ priv->stats.rx_packets++;
+ priv->stats.rx_bytes += len;
+}
+
+static irqreturn_t
+netx_eth_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+{
+ 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",
+ __FUNCTION__, 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 struct net_device_stats *netx_eth_query_statistics(struct net_device *ndev)
+{
+ struct netx_eth_priv *priv = netdev_priv(ndev);
+ return &priv->stats;
+}
+
+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, SA_SHIRQ, 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 int netx_eth_enable(struct net_device *ndev)
+{
+ struct netx_eth_priv *priv = netdev_priv(ndev);
+ unsigned int mac4321, mac65;
+ int running, i;
+
+ ether_setup(ndev);
+
+ ndev->open = netx_eth_open;
+ ndev->stop = netx_eth_close;
+ ndev->hard_start_xmit = netx_eth_hard_start_xmit;
+ ndev->tx_timeout = netx_eth_timeout;
+ ndev->watchdog_timeo = msecs_to_jiffies(5000);
+ ndev->get_stats = netx_eth_query_statistics;
+ ndev->set_multicast_list = netx_eth_set_multicast_list;
+
+ 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) {
+ printk("%s: could not allocate device.\n", CARDNAME);
+ ret = -ENOMEM;
+ goto exit;
+ }
+ SET_MODULE_OWNER(ndev);
+ SET_NETDEV_DEV(ndev, &pdev->dev);
+
+ platform_set_drvdata(pdev, ndev);
+
+ priv = netdev_priv(ndev);
+
+ pdata = (struct netxeth_platform_data *)pdev->dev.platform_data;
+ 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;
+
+ 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:
+ platform_set_drvdata(pdev, NULL);
+ free_netdev(ndev);
+exit:
+ return ret;
+}
+
+static int netx_eth_drv_remove(struct platform_device *pdev)
+{
+ struct net_device *ndev = dev_get_drvdata(&pdev->dev);
+ struct netx_eth_priv *priv = netdev_priv(ndev);
+
+ platform_set_drvdata(pdev, NULL);
+
+ 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,
+ .owner = THIS_MODULE,
+ },
+};
+
+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");
+
projects / linux-2.6 / commitdiff