/* * 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/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 <mach/hardware.h> #include <mach/netx-regs.h> #include <mach/pfifo.h> #include <mach/xc.h> #include <mach/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 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; 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 = dev_alloc_skb(len); if (unlikely(skb == NULL)) { printk(KERN_NOTICE "%s: Low memory, packet dropped.\n", ndev->name); 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_multicast_list = 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; ether_setup(ndev); 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) { printk("%s: could not allocate device.\n", CARDNAME); ret = -ENOMEM; goto exit; } 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; 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: 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"); MODULE_ALIAS("platform:" CARDNAME);