Orange Pi5 kernel

// SPDX-License-Identifier: GPL-2.0-only
/*
 * wanXL serial card driver for Linux
 * host part
 *
 * Copyright (C) 2003 Krzysztof Halasa <khc@pm.waw.pl>
 *
 * Status:
 *   - Only DTE (external clock) support with NRZ and NRZI encodings
 *   - wanXL100 will require minor driver modifications, no access to hw
 */
 
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/sched.h>
#include <linux/types.h>
#include <linux/fcntl.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/netdevice.h>
#include <linux/hdlc.h>
#include <linux/pci.h>
#include <linux/dma-mapping.h>
#include <linux/delay.h>
#include <asm/io.h>
 
#include "wanxl.h"
 
static const char* version = "wanXL serial card driver version: 0.48";
 
#define PLX_CTL_RESET   0x40000000 /* adapter reset */
 
#undef DEBUG_PKT
#undef DEBUG_PCI
 
/* MAILBOX #1 - PUTS COMMANDS */
#define MBX1_CMD_ABORTJ 0x85000000 /* Abort and Jump */
#ifdef __LITTLE_ENDIAN
#define MBX1_CMD_BSWAP  0x8C000001 /* little-endian Byte Swap Mode */
#else
#define MBX1_CMD_BSWAP  0x8C000000 /* big-endian Byte Swap Mode */
#endif
 
/* MAILBOX #2 - DRAM SIZE */
#define MBX2_MEMSZ_MASK 0xFFFF0000 /* PUTS Memory Size Register mask */
 
 
struct port {
<------>struct net_device *dev;
<------>struct card *card;
<------>spinlock_t lock;	/* for wanxl_xmit */
        int node;		/* physical port #0 - 3 */
<------>unsigned int clock_type;
<------>int tx_in, tx_out;
<------>struct sk_buff *tx_skbs[TX_BUFFERS];
};
 
 
struct card_status {
<------>desc_t rx_descs[RX_QUEUE_LENGTH];
<------>port_status_t port_status[4];
};
 
 
struct card {
<------>int n_ports;		/* 1, 2 or 4 ports */
<------>u8 irq;
 
<------>u8 __iomem *plx;	/* PLX PCI9060 virtual base address */
<------>struct pci_dev *pdev;	/* for pci_name(pdev) */
<------>int rx_in;
<------>struct sk_buff *rx_skbs[RX_QUEUE_LENGTH];
<------>struct card_status *status;	/* shared between host and card */
<------>dma_addr_t status_address;
<------>struct port ports[];	/* 1 - 4 port structures follow */
};
 
 
 
static inline struct port *dev_to_port(struct net_device *dev)
{
<------>return (struct port *)dev_to_hdlc(dev)->priv;
}
 
 
static inline port_status_t *get_status(struct port *port)
{
<------>return &port->card->status->port_status[port->node];
}
 
 
#ifdef DEBUG_PCI
static inline dma_addr_t pci_map_single_debug(struct pci_dev *pdev, void *ptr,
<------><------><------><------><------>      size_t size, int direction)
{
<------>dma_addr_t addr = dma_map_single(&pdev->dev, ptr, size, direction);
<------>if (addr + size > 0x100000000LL)
<------><------>pr_crit("%s: pci_map_single() returned memory at 0x%llx!\n",
<------><------><------>pci_name(pdev), (unsigned long long)addr);
<------>return addr;
}
 
#undef pci_map_single
#define pci_map_single pci_map_single_debug
#endif
 
 
/* Cable and/or personality module change interrupt service */
static inline void wanxl_cable_intr(struct port *port)
{
<------>u32 value = get_status(port)->cable;
<------>int valid = 1;
<------>const char *cable, *pm, *dte = "", *dsr = "", *dcd = "";
 
<------>switch(value & 0x7) {
<------>case STATUS_CABLE_V35: cable = "V.35"; break;
<------>case STATUS_CABLE_X21: cable = "X.21"; break;
<------>case STATUS_CABLE_V24: cable = "V.24"; break;
<------>case STATUS_CABLE_EIA530: cable = "EIA530"; break;
<------>case STATUS_CABLE_NONE: cable = "no"; break;
<------>default: cable = "invalid";
<------>}
 
<------>switch((value >> STATUS_CABLE_PM_SHIFT) & 0x7) {
<------>case STATUS_CABLE_V35: pm = "V.35"; break;
<------>case STATUS_CABLE_X21: pm = "X.21"; break;
<------>case STATUS_CABLE_V24: pm = "V.24"; break;
<------>case STATUS_CABLE_EIA530: pm = "EIA530"; break;
<------>case STATUS_CABLE_NONE: pm = "no personality"; valid = 0; break;
<------>default: pm = "invalid personality"; valid = 0;
<------>}
 
<------>if (valid) {
<------><------>if ((value & 7) == ((value >> STATUS_CABLE_PM_SHIFT) & 7)) {
<------><------><------>dsr = (value & STATUS_CABLE_DSR) ? ", DSR ON" :
<------><------><------><------>", DSR off";
<------><------><------>dcd = (value & STATUS_CABLE_DCD) ? ", carrier ON" :
<------><------><------><------>", carrier off";
<------><------>}
<------><------>dte = (value & STATUS_CABLE_DCE) ? " DCE" : " DTE";
<------>}
<------>netdev_info(port->dev, "%s%s module, %s cable%s%s\n",
<------><------>    pm, dte, cable, dsr, dcd);
 
<------>if (value & STATUS_CABLE_DCD)
<------><------>netif_carrier_on(port->dev);
<------>else
<------><------>netif_carrier_off(port->dev);
}
 
 
 
/* Transmit complete interrupt service */
static inline void wanxl_tx_intr(struct port *port)
{
<------>struct net_device *dev = port->dev;
<------>while (1) {
                desc_t *desc = &get_status(port)->tx_descs[port->tx_in];
<------><------>struct sk_buff *skb = port->tx_skbs[port->tx_in];
 
<------><------>switch (desc->stat) {
<------><------>case PACKET_FULL:
<------><------>case PACKET_EMPTY:
<------><------><------>netif_wake_queue(dev);
<------><------><------>return;
 
<------><------>case PACKET_UNDERRUN:
<------><------><------>dev->stats.tx_errors++;
<------><------><------>dev->stats.tx_fifo_errors++;
<------><------><------>break;
 
<------><------>default:
<------><------><------>dev->stats.tx_packets++;
<------><------><------>dev->stats.tx_bytes += skb->len;
<------><------>}
                desc->stat = PACKET_EMPTY; /* Free descriptor */
<------><------>dma_unmap_single(&port->card->pdev->dev, desc->address,
<------><------><------><------> skb->len, DMA_TO_DEVICE);
<------><------>dev_consume_skb_irq(skb);
                port->tx_in = (port->tx_in + 1) % TX_BUFFERS;
        }
}
 
 
 
/* Receive complete interrupt service */
static inline void wanxl_rx_intr(struct card *card)
{
<------>desc_t *desc;
<------>while (desc = &card->status->rx_descs[card->rx_in],
<------>       desc->stat != PACKET_EMPTY) {
<------><------>if ((desc->stat & PACKET_PORT_MASK) > card->n_ports)
<------><------><------>pr_crit("%s: received packet for nonexistent port\n",
<------><------><------><------>pci_name(card->pdev));
<------><------>else {
<------><------><------>struct sk_buff *skb = card->rx_skbs[card->rx_in];
<------><------><------>struct port *port = &card->ports[desc->stat &
<------><------><------><------><------><------>    PACKET_PORT_MASK];
<------><------><------>struct net_device *dev = port->dev;
 
<------><------><------>if (!skb)
<------><------><------><------>dev->stats.rx_dropped++;
<------><------><------>else {
<------><------><------><------>dma_unmap_single(&card->pdev->dev,
<------><------><------><------><------><------> desc->address, BUFFER_LENGTH,
<------><------><------><------><------><------> DMA_FROM_DEVICE);
<------><------><------><------>skb_put(skb, desc->length);
 
#ifdef DEBUG_PKT
<------><------><------><------>printk(KERN_DEBUG "%s RX(%i):", dev->name,
<------><------><------><------>       skb->len);
<------><------><------><------>debug_frame(skb);
#endif
<------><------><------><------>dev->stats.rx_packets++;
<------><------><------><------>dev->stats.rx_bytes += skb->len;
<------><------><------><------>skb->protocol = hdlc_type_trans(skb, dev);
<------><------><------><------>netif_rx(skb);
<------><------><------><------>skb = NULL;
<------><------><------>}
 
<------><------><------>if (!skb) {
<------><------><------><------>skb = dev_alloc_skb(BUFFER_LENGTH);
<------><------><------><------>desc->address = skb ?
<------><------><------><------><------>dma_map_single(&card->pdev->dev,
<------><------><------><------><------><------>       skb->data,
<------><------><------><------><------><------>       BUFFER_LENGTH,
<------><------><------><------><------><------>       DMA_FROM_DEVICE) : 0;
<------><------><------><------>card->rx_skbs[card->rx_in] = skb;
<------><------><------>}
<------><------>}
<------><------>desc->stat = PACKET_EMPTY; /* Free descriptor */
<------><------>card->rx_in = (card->rx_in + 1) % RX_QUEUE_LENGTH;
<------>}
}
 
 
 
static irqreturn_t wanxl_intr(int irq, void* dev_id)
{
<------>struct card *card = dev_id;
        int i;
        u32 stat;
        int handled = 0;
 
 
        while((stat = readl(card->plx + PLX_DOORBELL_FROM_CARD)) != 0) {
                handled = 1;
<------><------>writel(stat, card->plx + PLX_DOORBELL_FROM_CARD);
 
                for (i = 0; i < card->n_ports; i++) {
<------><------><------>if (stat & (1 << (DOORBELL_FROM_CARD_TX_0 + i)))
<------><------><------><------>wanxl_tx_intr(&card->ports[i]);
<------><------><------>if (stat & (1 << (DOORBELL_FROM_CARD_CABLE_0 + i)))
<------><------><------><------>wanxl_cable_intr(&card->ports[i]);
<------><------>}
<------><------>if (stat & (1 << DOORBELL_FROM_CARD_RX))
<------><------><------>wanxl_rx_intr(card);
        }
 
        return IRQ_RETVAL(handled);
}
 
 
 
static netdev_tx_t wanxl_xmit(struct sk_buff *skb, struct net_device *dev)
{
<------>struct port *port = dev_to_port(dev);
<------>desc_t *desc;
 
        spin_lock(&port->lock);
 
<------>desc = &get_status(port)->tx_descs[port->tx_out];
        if (desc->stat != PACKET_EMPTY) {
                /* should never happen - previous xmit should stop queue */
#ifdef DEBUG_PKT
                printk(KERN_DEBUG "%s: transmitter buffer full\n", dev->name);
#endif
<------><------>netif_stop_queue(dev);
<------><------>spin_unlock(&port->lock);
<------><------>return NETDEV_TX_BUSY;       /* request packet to be queued */
<------>}
 
#ifdef DEBUG_PKT
<------>printk(KERN_DEBUG "%s TX(%i):", dev->name, skb->len);
<------>debug_frame(skb);
#endif
 
<------>port->tx_skbs[port->tx_out] = skb;
<------>desc->address = dma_map_single(&port->card->pdev->dev, skb->data,
<------><------><------><------>       skb->len, DMA_TO_DEVICE);
<------>desc->length = skb->len;
<------>desc->stat = PACKET_FULL;
<------>writel(1 << (DOORBELL_TO_CARD_TX_0 + port->node),
<------>       port->card->plx + PLX_DOORBELL_TO_CARD);
 
<------>port->tx_out = (port->tx_out + 1) % TX_BUFFERS;
 
<------>if (get_status(port)->tx_descs[port->tx_out].stat != PACKET_EMPTY) {
<------><------>netif_stop_queue(dev);
#ifdef DEBUG_PKT
<------><------>printk(KERN_DEBUG "%s: transmitter buffer full\n", dev->name);
#endif
<------>}
 
<------>spin_unlock(&port->lock);
<------>return NETDEV_TX_OK;
}
 
 
 
static int wanxl_attach(struct net_device *dev, unsigned short encoding,
<------><------><------>unsigned short parity)
{
<------>struct port *port = dev_to_port(dev);
 
<------>if (encoding != ENCODING_NRZ &&
<------>    encoding != ENCODING_NRZI)
<------><------>return -EINVAL;
 
<------>if (parity != PARITY_NONE &&
<------>    parity != PARITY_CRC32_PR1_CCITT &&
<------>    parity != PARITY_CRC16_PR1_CCITT &&
<------>    parity != PARITY_CRC32_PR0_CCITT &&
<------>    parity != PARITY_CRC16_PR0_CCITT)
<------><------>return -EINVAL;
 
<------>get_status(port)->encoding = encoding;
<------>get_status(port)->parity = parity;
<------>return 0;
}
 
 
 
static int wanxl_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
{
<------>const size_t size = sizeof(sync_serial_settings);
<------>sync_serial_settings line;
<------>struct port *port = dev_to_port(dev);
 
<------>if (cmd != SIOCWANDEV)
<------><------>return hdlc_ioctl(dev, ifr, cmd);
 
<------>switch (ifr->ifr_settings.type) {
<------>case IF_GET_IFACE:
<------><------>ifr->ifr_settings.type = IF_IFACE_SYNC_SERIAL;
<------><------>if (ifr->ifr_settings.size < size) {
<------><------><------>ifr->ifr_settings.size = size; /* data size wanted */
<------><------><------>return -ENOBUFS;
<------><------>}
<------><------>memset(&line, 0, sizeof(line));
<------><------>line.clock_type = get_status(port)->clocking;
<------><------>line.clock_rate = 0;
<------><------>line.loopback = 0;
 
<------><------>if (copy_to_user(ifr->ifr_settings.ifs_ifsu.sync, &line, size))
<------><------><------>return -EFAULT;
<------><------>return 0;
 
<------>case IF_IFACE_SYNC_SERIAL:
<------><------>if (!capable(CAP_NET_ADMIN))
<------><------><------>return -EPERM;
<------><------>if (dev->flags & IFF_UP)
<------><------><------>return -EBUSY;
 
<------><------>if (copy_from_user(&line, ifr->ifr_settings.ifs_ifsu.sync,
<------><------><------><------>   size))
<------><------><------>return -EFAULT;
 
<------><------>if (line.clock_type != CLOCK_EXT &&
<------><------>    line.clock_type != CLOCK_TXFROMRX)
<------><------><------>return -EINVAL; /* No such clock setting */
 
<------><------>if (line.loopback != 0)
<------><------><------>return -EINVAL;
 
<------><------>get_status(port)->clocking = line.clock_type;
<------><------>return 0;
 
<------>default:
<------><------>return hdlc_ioctl(dev, ifr, cmd);
        }
}
 
 
 
static int wanxl_open(struct net_device *dev)
{
<------>struct port *port = dev_to_port(dev);
<------>u8 __iomem *dbr = port->card->plx + PLX_DOORBELL_TO_CARD;
<------>unsigned long timeout;
<------>int i;
 
<------>if (get_status(port)->open) {
<------><------>netdev_err(dev, "port already open\n");
<------><------>return -EIO;
<------>}
<------>if ((i = hdlc_open(dev)) != 0)
<------><------>return i;
 
<------>port->tx_in = port->tx_out = 0;
<------>for (i = 0; i < TX_BUFFERS; i++)
<------><------>get_status(port)->tx_descs[i].stat = PACKET_EMPTY;
<------>/* signal the card */
<------>writel(1 << (DOORBELL_TO_CARD_OPEN_0 + port->node), dbr);
 
<------>timeout = jiffies + HZ;
<------>do {
<------><------>if (get_status(port)->open) {
<------><------><------>netif_start_queue(dev);
<------><------><------>return 0;
<------><------>}
<------>} while (time_after(timeout, jiffies));
 
<------>netdev_err(dev, "unable to open port\n");
<------>/* ask the card to close the port, should it be still alive */
<------>writel(1 << (DOORBELL_TO_CARD_CLOSE_0 + port->node), dbr);
<------>return -EFAULT;
}
 
 
 
static int wanxl_close(struct net_device *dev)
{
<------>struct port *port = dev_to_port(dev);
<------>unsigned long timeout;
<------>int i;
 
<------>hdlc_close(dev);
<------>/* signal the card */
<------>writel(1 << (DOORBELL_TO_CARD_CLOSE_0 + port->node),
<------>       port->card->plx + PLX_DOORBELL_TO_CARD);
 
<------>timeout = jiffies + HZ;
<------>do {
<------><------>if (!get_status(port)->open)
<------><------><------>break;
<------>} while (time_after(timeout, jiffies));
 
<------>if (get_status(port)->open)
<------><------>netdev_err(dev, "unable to close port\n");
 
<------>netif_stop_queue(dev);
 
<------>for (i = 0; i < TX_BUFFERS; i++) {
<------><------>desc_t *desc = &get_status(port)->tx_descs[i];
 
<------><------>if (desc->stat != PACKET_EMPTY) {
<------><------><------>desc->stat = PACKET_EMPTY;
<------><------><------>dma_unmap_single(&port->card->pdev->dev,
<------><------><------><------><------> desc->address, port->tx_skbs[i]->len,
<------><------><------><------><------> DMA_TO_DEVICE);
<------><------><------>dev_kfree_skb(port->tx_skbs[i]);
<------><------>}
<------>}
<------>return 0;
}
 
 
 
static struct net_device_stats *wanxl_get_stats(struct net_device *dev)
{
<------>struct port *port = dev_to_port(dev);
 
<------>dev->stats.rx_over_errors = get_status(port)->rx_overruns;
<------>dev->stats.rx_frame_errors = get_status(port)->rx_frame_errors;
<------>dev->stats.rx_errors = dev->stats.rx_over_errors +
<------><------>dev->stats.rx_frame_errors;
<------>return &dev->stats;
}
 
 
 
static int wanxl_puts_command(struct card *card, u32 cmd)
{
<------>unsigned long timeout = jiffies + 5 * HZ;
 
<------>writel(cmd, card->plx + PLX_MAILBOX_1);
<------>do {
<------><------>if (readl(card->plx + PLX_MAILBOX_1) == 0)
<------><------><------>return 0;
 
<------><------>schedule();
<------>}while (time_after(timeout, jiffies));
 
<------>return -1;
}
 
 
 
static void wanxl_reset(struct card *card)
{
<------>u32 old_value = readl(card->plx + PLX_CONTROL) & ~PLX_CTL_RESET;
 
<------>writel(0x80, card->plx + PLX_MAILBOX_0);
<------>writel(old_value | PLX_CTL_RESET, card->plx + PLX_CONTROL);
<------>readl(card->plx + PLX_CONTROL); /* wait for posted write */
<------>udelay(1);
<------>writel(old_value, card->plx + PLX_CONTROL);
<------>readl(card->plx + PLX_CONTROL); /* wait for posted write */
}
 
 
 
static void wanxl_pci_remove_one(struct pci_dev *pdev)
{
<------>struct card *card = pci_get_drvdata(pdev);
<------>int i;
 
<------>for (i = 0; i < card->n_ports; i++) {
<------><------>unregister_hdlc_device(card->ports[i].dev);
<------><------>free_netdev(card->ports[i].dev);
<------>}
 
<------>/* unregister and free all host resources */
<------>if (card->irq)
<------><------>free_irq(card->irq, card);
 
<------>wanxl_reset(card);
 
<------>for (i = 0; i < RX_QUEUE_LENGTH; i++)
<------><------>if (card->rx_skbs[i]) {
<------><------><------>dma_unmap_single(&card->pdev->dev,
<------><------><------><------><------> card->status->rx_descs[i].address,
<------><------><------><------><------> BUFFER_LENGTH, DMA_FROM_DEVICE);
<------><------><------>dev_kfree_skb(card->rx_skbs[i]);
<------><------>}
 
<------>if (card->plx)
<------><------>iounmap(card->plx);
 
<------>if (card->status)
<------><------>dma_free_coherent(&pdev->dev, sizeof(struct card_status),
<------><------><------><------>  card->status, card->status_address);
 
<------>pci_release_regions(pdev);
<------>pci_disable_device(pdev);
<------>kfree(card);
}
 
 
#include "wanxlfw.inc"
 
static const struct net_device_ops wanxl_ops = {
<------>.ndo_open       = wanxl_open,
<------>.ndo_stop       = wanxl_close,
<------>.ndo_start_xmit = hdlc_start_xmit,
<------>.ndo_do_ioctl   = wanxl_ioctl,
<------>.ndo_get_stats  = wanxl_get_stats,
};
 
static int wanxl_pci_init_one(struct pci_dev *pdev,
<------><------><------>      const struct pci_device_id *ent)
{
<------>struct card *card;
<------>u32 ramsize, stat;
<------>unsigned long timeout;
<------>u32 plx_phy;		/* PLX PCI base address */
<------>u32 mem_phy;		/* memory PCI base addr */
<------>u8 __iomem *mem;	/* memory virtual base addr */
<------>int i, ports;
 
#ifndef MODULE
<------>pr_info_once("%s\n", version);
#endif
 
<------>i = pci_enable_device(pdev);
<------>if (i)
<------><------>return i;
 
<------>/* QUICC can only access first 256 MB of host RAM directly,
<------>   but PLX9060 DMA does 32-bits for actual packet data transfers */
 
<------>/* FIXME when PCI/DMA subsystems are fixed.
<------>   We set both dma_mask and consistent_dma_mask to 28 bits
<------>   and pray pci_alloc_consistent() will use this info. It should
<------>   work on most platforms */
<------>if (dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(28)) ||
<------>    dma_set_mask(&pdev->dev, DMA_BIT_MASK(28))) {
<------><------>pr_err("No usable DMA configuration\n");
<------><------>pci_disable_device(pdev);
<------><------>return -EIO;
<------>}
 
<------>i = pci_request_regions(pdev, "wanXL");
<------>if (i) {
<------><------>pci_disable_device(pdev);
<------><------>return i;
<------>}
 
<------>switch (pdev->device) {
<------>case PCI_DEVICE_ID_SBE_WANXL100: ports = 1; break;
<------>case PCI_DEVICE_ID_SBE_WANXL200: ports = 2; break;
<------>default: ports = 4;
<------>}
 
<------>card = kzalloc(struct_size(card, ports, ports), GFP_KERNEL);
<------>if (card == NULL) {
<------><------>pci_release_regions(pdev);
<------><------>pci_disable_device(pdev);
<------><------>return -ENOBUFS;
<------>}
 
<------>pci_set_drvdata(pdev, card);
<------>card->pdev = pdev;
 
<------>card->status = dma_alloc_coherent(&pdev->dev,
<------><------><------><------><------>  sizeof(struct card_status),
<------><------><------><------><------>  &card->status_address, GFP_KERNEL);
<------>if (card->status == NULL) {
<------><------>wanxl_pci_remove_one(pdev);
<------><------>return -ENOBUFS;
<------>}
 
#ifdef DEBUG_PCI
<------>printk(KERN_DEBUG "wanXL %s: pci_alloc_consistent() returned memory"
<------>       " at 0x%LX\n", pci_name(pdev),
<------>       (unsigned long long)card->status_address);
#endif
 
<------>/* FIXME when PCI/DMA subsystems are fixed.
<------>   We set both dma_mask and consistent_dma_mask back to 32 bits
<------>   to indicate the card can do 32-bit DMA addressing */
<------>if (dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32)) ||
<------>    dma_set_mask(&pdev->dev, DMA_BIT_MASK(32))) {
<------><------>pr_err("No usable DMA configuration\n");
<------><------>wanxl_pci_remove_one(pdev);
<------><------>return -EIO;
<------>}
 
<------>/* set up PLX mapping */
<------>plx_phy = pci_resource_start(pdev, 0);
 
<------>card->plx = ioremap(plx_phy, 0x70);
<------>if (!card->plx) {
<------><------>pr_err("ioremap() failed\n");
 		wanxl_pci_remove_one(pdev);
<------><------>return -EFAULT;
<------>}
 
#if RESET_WHILE_LOADING
<------>wanxl_reset(card);
#endif
 
<------>timeout = jiffies + 20 * HZ;
<------>while ((stat = readl(card->plx + PLX_MAILBOX_0)) != 0) {
<------><------>if (time_before(timeout, jiffies)) {
<------><------><------>pr_warn("%s: timeout waiting for PUTS to complete\n",
<------><------><------><------>pci_name(pdev));
<------><------><------>wanxl_pci_remove_one(pdev);
<------><------><------>return -ENODEV;
<------><------>}
 
<------><------>switch(stat & 0xC0) {
<------><------>case 0x00:	/* hmm - PUTS completed with non-zero code? */
<------><------>case 0x80:	/* PUTS still testing the hardware */
<------><------><------>break;
 
<------><------>default:
<------><------><------>pr_warn("%s: PUTS test 0x%X failed\n",
<------><------><------><------>pci_name(pdev), stat & 0x30);
<------><------><------>wanxl_pci_remove_one(pdev);
<------><------><------>return -ENODEV;
<------><------>}
 
<------><------>schedule();
<------>}
 
<------>/* get on-board memory size (PUTS detects no more than 4 MB) */
<------>ramsize = readl(card->plx + PLX_MAILBOX_2) & MBX2_MEMSZ_MASK;
 
<------>/* set up on-board RAM mapping */
<------>mem_phy = pci_resource_start(pdev, 2);
 
 
<------>/* sanity check the board's reported memory size */
<------>if (ramsize < BUFFERS_ADDR +
<------>    (TX_BUFFERS + RX_BUFFERS) * BUFFER_LENGTH * ports) {
<------><------>pr_warn("%s: no enough on-board RAM (%u bytes detected, %u bytes required)\n",
<------><------><------>pci_name(pdev), ramsize,
<------><------><------>BUFFERS_ADDR +
<------><------><------>(TX_BUFFERS + RX_BUFFERS) * BUFFER_LENGTH * ports);
<------><------>wanxl_pci_remove_one(pdev);
<------><------>return -ENODEV;
<------>}
 
<------>if (wanxl_puts_command(card, MBX1_CMD_BSWAP)) {
<------><------>pr_warn("%s: unable to Set Byte Swap Mode\n", pci_name(pdev));
<------><------>wanxl_pci_remove_one(pdev);
<------><------>return -ENODEV;
<------>}
 
<------>for (i = 0; i < RX_QUEUE_LENGTH; i++) {
<------><------>struct sk_buff *skb = dev_alloc_skb(BUFFER_LENGTH);
<------><------>card->rx_skbs[i] = skb;
<------><------>if (skb)
<------><------><------>card->status->rx_descs[i].address =
<------><------><------><------>dma_map_single(&card->pdev->dev, skb->data,
<------><------><------><------><------>       BUFFER_LENGTH, DMA_FROM_DEVICE);
<------>}
 
<------>mem = ioremap(mem_phy, PDM_OFFSET + sizeof(firmware));
<------>if (!mem) {
<------><------>pr_err("ioremap() failed\n");
 		wanxl_pci_remove_one(pdev);
<------><------>return -EFAULT;
<------>}
 
<------>for (i = 0; i < sizeof(firmware); i += 4)
<------><------>writel(ntohl(*(__be32*)(firmware + i)), mem + PDM_OFFSET + i);
 
<------>for (i = 0; i < ports; i++)
<------><------>writel(card->status_address +
<------><------>       (void *)&card->status->port_status[i] -
<------><------>       (void *)card->status, mem + PDM_OFFSET + 4 + i * 4);
<------>writel(card->status_address, mem + PDM_OFFSET + 20);
<------>writel(PDM_OFFSET, mem);
<------>iounmap(mem);
 
<------>writel(0, card->plx + PLX_MAILBOX_5);
 
<------>if (wanxl_puts_command(card, MBX1_CMD_ABORTJ)) {
<------><------>pr_warn("%s: unable to Abort and Jump\n", pci_name(pdev));
<------><------>wanxl_pci_remove_one(pdev);
<------><------>return -ENODEV;
<------>}
 
<------>timeout = jiffies + 5 * HZ;
<------>do {
<------><------>if ((stat = readl(card->plx + PLX_MAILBOX_5)) != 0)
<------><------><------>break;
<------><------>schedule();
<------>}while (time_after(timeout, jiffies));
 
<------>if (!stat) {
<------><------>pr_warn("%s: timeout while initializing card firmware\n",
<------><------><------>pci_name(pdev));
<------><------>wanxl_pci_remove_one(pdev);
<------><------>return -ENODEV;
<------>}
 
#if DETECT_RAM
<------>ramsize = stat;
#endif
 
<------>pr_info("%s: at 0x%X, %u KB of RAM at 0x%X, irq %u\n",
<------><------>pci_name(pdev), plx_phy, ramsize / 1024, mem_phy, pdev->irq);
 
<------>/* Allocate IRQ */
<------>if (request_irq(pdev->irq, wanxl_intr, IRQF_SHARED, "wanXL", card)) {
<------><------>pr_warn("%s: could not allocate IRQ%i\n",
<------><------><------>pci_name(pdev), pdev->irq);
<------><------>wanxl_pci_remove_one(pdev);
<------><------>return -EBUSY;
<------>}
<------>card->irq = pdev->irq;
 
<------>for (i = 0; i < ports; i++) {
<------><------>hdlc_device *hdlc;
<------><------>struct port *port = &card->ports[i];
<------><------>struct net_device *dev = alloc_hdlcdev(port);
<------><------>if (!dev) {
<------><------><------>pr_err("%s: unable to allocate memory\n",
<------><------><------>       pci_name(pdev));
<------><------><------>wanxl_pci_remove_one(pdev);
<------><------><------>return -ENOMEM;
<------><------>}
 
<------><------>port->dev = dev;
<------><------>hdlc = dev_to_hdlc(dev);
<------><------>spin_lock_init(&port->lock);
<------><------>dev->tx_queue_len = 50;
<------><------>dev->netdev_ops = &wanxl_ops;
<------><------>hdlc->attach = wanxl_attach;
<------><------>hdlc->xmit = wanxl_xmit;
<------><------>port->card = card;
<------><------>port->node = i;
<------><------>get_status(port)->clocking = CLOCK_EXT;
<------><------>if (register_hdlc_device(dev)) {
<------><------><------>pr_err("%s: unable to register hdlc device\n",
<------><------><------>       pci_name(pdev));
<------><------><------>free_netdev(dev);
<------><------><------>wanxl_pci_remove_one(pdev);
<------><------><------>return -ENOBUFS;
<------><------>}
<------><------>card->n_ports++;
<------>}
 
<------>pr_info("%s: port", pci_name(pdev));
<------>for (i = 0; i < ports; i++)
<------><------>pr_cont("%s #%i: %s",
<------><------><------>i ? "," : "", i, card->ports[i].dev->name);
<------>pr_cont("\n");
 
<------>for (i = 0; i < ports; i++)
<------><------>wanxl_cable_intr(&card->ports[i]); /* get carrier status etc.*/
 
<------>return 0;
}
 
static const struct pci_device_id wanxl_pci_tbl[] = {
<------>{ PCI_VENDOR_ID_SBE, PCI_DEVICE_ID_SBE_WANXL100, PCI_ANY_ID,
<------>  PCI_ANY_ID, 0, 0, 0 },
<------>{ PCI_VENDOR_ID_SBE, PCI_DEVICE_ID_SBE_WANXL200, PCI_ANY_ID,
<------>  PCI_ANY_ID, 0, 0, 0 },
<------>{ PCI_VENDOR_ID_SBE, PCI_DEVICE_ID_SBE_WANXL400, PCI_ANY_ID,
<------>  PCI_ANY_ID, 0, 0, 0 },
<------>{ 0, }
};
 
 
static struct pci_driver wanxl_pci_driver = {
<------>.name		= "wanXL",
<------>.id_table	= wanxl_pci_tbl,
<------>.probe		= wanxl_pci_init_one,
<------>.remove		= wanxl_pci_remove_one,
};
 
 
static int __init wanxl_init_module(void)
{
#ifdef MODULE
<------>pr_info("%s\n", version);
#endif
<------>return pci_register_driver(&wanxl_pci_driver);
}
 
static void __exit wanxl_cleanup_module(void)
{
<------>pci_unregister_driver(&wanxl_pci_driver);
}
 
 
MODULE_AUTHOR("Krzysztof Halasa <khc@pm.waw.pl>");
MODULE_DESCRIPTION("SBE Inc. wanXL serial port driver");
MODULE_LICENSE("GPL v2");
MODULE_DEVICE_TABLE(pci, wanxl_pci_tbl);
 
module_init(wanxl_init_module);
module_exit(wanxl_cleanup_module);