Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 851 insertions, 0 deletions

diff --git a/drivers/net/irda/au1k_ir.c b/drivers/net/irda/au1k_ir.c
new file mode 100644
index 000000000000..e6b1985767c2
--- /dev/null
+++ b/drivers/net/irda/au1k_ir.c
@@ -0,0 +1,851 @@
+/*
+ * Alchemy Semi Au1000 IrDA driver
+ *
+ * Copyright 2001 MontaVista Software Inc.
+ * Author: MontaVista Software, Inc.
+ *              ppopov@mvista.com or source@mvista.com
+ *
+ *  This program is free software; you can distribute 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 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/module.h>
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/errno.h>
+#include <linux/netdevice.h>
+#include <linux/slab.h>
+#include <linux/rtnetlink.h>
+#include <linux/interrupt.h>
+#include <linux/pm.h>
+#include <linux/bitops.h>
+
+#include <asm/irq.h>
+#include <asm/io.h>
+#include <asm/au1000.h>
+#if defined(CONFIG_MIPS_PB1000) || defined(CONFIG_MIPS_PB1100)
+#include <asm/pb1000.h>
+#elif defined(CONFIG_MIPS_DB1000) || defined(CONFIG_MIPS_DB1100)
+#include <asm/db1x00.h>
+#else 
+#error au1k_ir: unsupported board
+#endif
+
+#include <net/irda/irda.h>
+#include <net/irda/irmod.h>
+#include <net/irda/wrapper.h>
+#include <net/irda/irda_device.h>
+#include "au1000_ircc.h"
+
+static int au1k_irda_net_init(struct net_device *);
+static int au1k_irda_start(struct net_device *);
+static int au1k_irda_stop(struct net_device *dev);
+static int au1k_irda_hard_xmit(struct sk_buff *, struct net_device *);
+static int au1k_irda_rx(struct net_device *);
+static void au1k_irda_interrupt(int, void *, struct pt_regs *);
+static void au1k_tx_timeout(struct net_device *);
+static struct net_device_stats *au1k_irda_stats(struct net_device *);
+static int au1k_irda_ioctl(struct net_device *, struct ifreq *, int);
+static int au1k_irda_set_speed(struct net_device *dev, int speed);
+
+static void *dma_alloc(size_t, dma_addr_t *);
+static void dma_free(void *, size_t);
+
+static int qos_mtt_bits = 0x07;  /* 1 ms or more */
+static struct net_device *ir_devs[NUM_IR_IFF];
+static char version[] __devinitdata =
+    "au1k_ircc:1.2 ppopov@mvista.com\n";
+
+#define RUN_AT(x) (jiffies + (x))
+
+#if defined(CONFIG_MIPS_DB1000) || defined(CONFIG_MIPS_DB1100)
+static BCSR * const bcsr = (BCSR *)0xAE000000;
+#endif
+
+static DEFINE_SPINLOCK(ir_lock);
+
+/*
+ * IrDA peripheral bug. You have to read the register
+ * twice to get the right value.
+ */
+u32 read_ir_reg(u32 addr) 
+{ 
+        readl(addr);
+        return readl(addr);
+}
+
+
+/*
+ * Buffer allocation/deallocation routines. The buffer descriptor returned
+ * has the virtual and dma address of a buffer suitable for 
+ * both, receive and transmit operations.
+ */
+static db_dest_t *GetFreeDB(struct au1k_private *aup)
+{
+        db_dest_t *pDB;
+        pDB = aup->pDBfree;
+
+        if (pDB) {
+                aup->pDBfree = pDB->pnext;
+        }
+        return pDB;
+}
+
+static void ReleaseDB(struct au1k_private *aup, db_dest_t *pDB)
+{
+        db_dest_t *pDBfree = aup->pDBfree;
+        if (pDBfree)
+                pDBfree->pnext = pDB;
+        aup->pDBfree = pDB;
+}
+
+
+/*
+  DMA memory allocation, derived from pci_alloc_consistent.
+  However, the Au1000 data cache is coherent (when programmed
+  so), therefore we return KSEG0 address, not KSEG1.
+*/
+static void *dma_alloc(size_t size, dma_addr_t * dma_handle)
+{
+        void *ret;
+        int gfp = GFP_ATOMIC | GFP_DMA;
+
+        ret = (void *) __get_free_pages(gfp, get_order(size));
+
+        if (ret != NULL) {
+                memset(ret, 0, size);
+                *dma_handle = virt_to_bus(ret);
+                ret = (void *)KSEG0ADDR(ret);
+        }
+        return ret;
+}
+
+
+static void dma_free(void *vaddr, size_t size)
+{
+        vaddr = (void *)KSEG0ADDR(vaddr);
+        free_pages((unsigned long) vaddr, get_order(size));
+}
+
+
+static void 
+setup_hw_rings(struct au1k_private *aup, u32 rx_base, u32 tx_base)
+{
+        int i;
+        for (i=0; i<NUM_IR_DESC; i++) {
+                aup->rx_ring[i] = (volatile ring_dest_t *) 
+                        (rx_base + sizeof(ring_dest_t)*i);
+        }
+        for (i=0; i<NUM_IR_DESC; i++) {
+                aup->tx_ring[i] = (volatile ring_dest_t *) 
+                        (tx_base + sizeof(ring_dest_t)*i);
+        }
+}
+
+static int au1k_irda_init(void)
+{
+        static unsigned version_printed = 0;
+        struct au1k_private *aup;
+        struct net_device *dev;
+        int err;
+
+        if (version_printed++ == 0) printk(version);
+
+        dev = alloc_irdadev(sizeof(struct au1k_private));
+        if (!dev)
+                return -ENOMEM;
+
+        dev->irq = AU1000_IRDA_RX_INT; /* TX has its own interrupt */
+        err = au1k_irda_net_init(dev);
+        if (err)
+                goto out;
+        err = register_netdev(dev);
+        if (err)
+                goto out1;
+        ir_devs[0] = dev;
+        printk(KERN_INFO "IrDA: Registered device %s\n", dev->name);
+        return 0;
+
+out1:
+        aup = netdev_priv(dev);
+        dma_free((void *)aup->db[0].vaddr,
+                MAX_BUF_SIZE * 2*NUM_IR_DESC);
+        dma_free((void *)aup->rx_ring[0],
+                2 * MAX_NUM_IR_DESC*(sizeof(ring_dest_t)));
+        kfree(aup->rx_buff.head);
+out:
+        free_netdev(dev);
+        return err;
+}
+
+static int au1k_irda_init_iobuf(iobuff_t *io, int size)
+{
+        io->head = kmalloc(size, GFP_KERNEL);
+        if (io->head != NULL) {
+                io->truesize = size;
+                io->in_frame = FALSE;
+                io->state    = OUTSIDE_FRAME;
+                io->data     = io->head;
+        }
+        return io->head ? 0 : -ENOMEM;
+}
+
+static int au1k_irda_net_init(struct net_device *dev)
+{
+        struct au1k_private *aup = netdev_priv(dev);
+        int i, retval = 0, err;
+        db_dest_t *pDB, *pDBfree;
+        dma_addr_t temp;
+
+        err = au1k_irda_init_iobuf(&aup->rx_buff, 14384);
+        if (err)
+                goto out1;
+
+        dev->open = au1k_irda_start;
+        dev->hard_start_xmit = au1k_irda_hard_xmit;
+        dev->stop = au1k_irda_stop;
+        dev->get_stats = au1k_irda_stats;
+        dev->do_ioctl = au1k_irda_ioctl;
+        dev->tx_timeout = au1k_tx_timeout;
+
+        irda_init_max_qos_capabilies(&aup->qos);
+
+        /* The only value we must override it the baudrate */
+        aup->qos.baud_rate.bits = IR_9600|IR_19200|IR_38400|IR_57600|
+                IR_115200|IR_576000 |(IR_4000000 << 8);
+        
+        aup->qos.min_turn_time.bits = qos_mtt_bits;
+        irda_qos_bits_to_value(&aup->qos);
+
+        retval = -ENOMEM;
+
+        /* Tx ring follows rx ring + 512 bytes */
+        /* we need a 1k aligned buffer */
+        aup->rx_ring[0] = (ring_dest_t *)
+                dma_alloc(2*MAX_NUM_IR_DESC*(sizeof(ring_dest_t)), &temp);
+        if (!aup->rx_ring[0])
+                goto out2;
+
+        /* allocate the data buffers */
+        aup->db[0].vaddr = 
+                (void *)dma_alloc(MAX_BUF_SIZE * 2*NUM_IR_DESC, &temp);
+        if (!aup->db[0].vaddr)
+                goto out3;
+
+        setup_hw_rings(aup, (u32)aup->rx_ring[0], (u32)aup->rx_ring[0] + 512);
+
+        pDBfree = NULL;
+        pDB = aup->db;
+        for (i=0; i<(2*NUM_IR_DESC); i++) {
+                pDB->pnext = pDBfree;
+                pDBfree = pDB;
+                pDB->vaddr = 
+                        (u32 *)((unsigned)aup->db[0].vaddr + MAX_BUF_SIZE*i);
+                pDB->dma_addr = (dma_addr_t)virt_to_bus(pDB->vaddr);
+                pDB++;
+        }
+        aup->pDBfree = pDBfree;
+
+        /* attach a data buffer to each descriptor */
+        for (i=0; i<NUM_IR_DESC; i++) {
+                pDB = GetFreeDB(aup);
+                if (!pDB) goto out;
+                aup->rx_ring[i]->addr_0 = (u8)(pDB->dma_addr & 0xff);
+                aup->rx_ring[i]->addr_1 = (u8)((pDB->dma_addr>>8) & 0xff);
+                aup->rx_ring[i]->addr_2 = (u8)((pDB->dma_addr>>16) & 0xff);
+                aup->rx_ring[i]->addr_3 = (u8)((pDB->dma_addr>>24) & 0xff);
+                aup->rx_db_inuse[i] = pDB;
+        }
+        for (i=0; i<NUM_IR_DESC; i++) {
+                pDB = GetFreeDB(aup);
+                if (!pDB) goto out;
+                aup->tx_ring[i]->addr_0 = (u8)(pDB->dma_addr & 0xff);
+                aup->tx_ring[i]->addr_1 = (u8)((pDB->dma_addr>>8) & 0xff);
+                aup->tx_ring[i]->addr_2 = (u8)((pDB->dma_addr>>16) & 0xff);
+                aup->tx_ring[i]->addr_3 = (u8)((pDB->dma_addr>>24) & 0xff);
+                aup->tx_ring[i]->count_0 = 0;
+                aup->tx_ring[i]->count_1 = 0;
+                aup->tx_ring[i]->flags = 0;
+                aup->tx_db_inuse[i] = pDB;
+        }
+
+#if defined(CONFIG_MIPS_DB1000) || defined(CONFIG_MIPS_DB1100)
+        /* power on */
+        bcsr->resets &= ~BCSR_RESETS_IRDA_MODE_MASK;
+        bcsr->resets |= BCSR_RESETS_IRDA_MODE_FULL;
+        au_sync();
+#endif
+
+        return 0;
+
+out3:
+        dma_free((void *)aup->rx_ring[0],
+                2 * MAX_NUM_IR_DESC*(sizeof(ring_dest_t)));
+out2:
+        kfree(aup->rx_buff.head);
+out1:
+        printk(KERN_ERR "au1k_init_module failed.  Returns %d\n", retval);
+        return retval;
+}
+
+
+static int au1k_init(struct net_device *dev)
+{
+        struct au1k_private *aup = netdev_priv(dev);
+        int i;
+        u32 control;
+        u32 ring_address;
+
+        /* bring the device out of reset */
+        control = 0xe; /* coherent, clock enable, one half system clock */
+                          
+#ifndef CONFIG_CPU_LITTLE_ENDIAN
+        control |= 1;
+#endif
+        aup->tx_head = 0;
+        aup->tx_tail = 0;
+        aup->rx_head = 0;
+
+        for (i=0; i<NUM_IR_DESC; i++) {
+                aup->rx_ring[i]->flags = AU_OWN;
+        }
+
+        writel(control, IR_INTERFACE_CONFIG);
+        au_sync_delay(10);
+
+        writel(read_ir_reg(IR_ENABLE) & ~0x8000, IR_ENABLE); /* disable PHY */
+        au_sync_delay(1);
+
+        writel(MAX_BUF_SIZE, IR_MAX_PKT_LEN);
+
+        ring_address = (u32)virt_to_phys((void *)aup->rx_ring[0]);
+        writel(ring_address >> 26, IR_RING_BASE_ADDR_H);
+        writel((ring_address >> 10) & 0xffff, IR_RING_BASE_ADDR_L);
+
+        writel(RING_SIZE_64<<8 | RING_SIZE_64<<12, IR_RING_SIZE);
+
+        writel(1<<2 | IR_ONE_PIN, IR_CONFIG_2); /* 48MHz */
+        writel(0, IR_RING_ADDR_CMPR);
+
+        au1k_irda_set_speed(dev, 9600);
+        return 0;
+}
+
+static int au1k_irda_start(struct net_device *dev)
+{
+        int retval;
+        char hwname[32];
+        struct au1k_private *aup = netdev_priv(dev);
+
+        if ((retval = au1k_init(dev))) {
+                printk(KERN_ERR "%s: error in au1k_init\n", dev->name);
+                return retval;
+        }
+
+        if ((retval = request_irq(AU1000_IRDA_TX_INT, &au1k_irda_interrupt, 
+                                        0, dev->name, dev))) {
+                printk(KERN_ERR "%s: unable to get IRQ %d\n", 
+                                dev->name, dev->irq);
+                return retval;
+        }
+        if ((retval = request_irq(AU1000_IRDA_RX_INT, &au1k_irda_interrupt, 
+                                        0, dev->name, dev))) {
+                free_irq(AU1000_IRDA_TX_INT, dev);
+                printk(KERN_ERR "%s: unable to get IRQ %d\n", 
+                                dev->name, dev->irq);
+                return retval;
+        }
+
+        /* Give self a hardware name */
+        sprintf(hwname, "Au1000 SIR/FIR");
+        aup->irlap = irlap_open(dev, &aup->qos, hwname);
+        netif_start_queue(dev);
+
+        writel(read_ir_reg(IR_CONFIG_2) | 1<<8, IR_CONFIG_2); /* int enable */
+
+        aup->timer.expires = RUN_AT((3*HZ)); 
+        aup->timer.data = (unsigned long)dev;
+        return 0;
+}
+
+static int au1k_irda_stop(struct net_device *dev)
+{
+        struct au1k_private *aup = netdev_priv(dev);
+
+        /* disable interrupts */
+        writel(read_ir_reg(IR_CONFIG_2) & ~(1<<8), IR_CONFIG_2);
+        writel(0, IR_CONFIG_1); 
+        writel(0, IR_INTERFACE_CONFIG); /* disable clock */
+        au_sync();
+
+        if (aup->irlap) {
+                irlap_close(aup->irlap);
+                aup->irlap = NULL;
+        }
+
+        netif_stop_queue(dev);
+        del_timer(&aup->timer);
+
+        /* disable the interrupt */
+        free_irq(AU1000_IRDA_TX_INT, dev);
+        free_irq(AU1000_IRDA_RX_INT, dev);
+        return 0;
+}
+
+static void __exit au1k_irda_exit(void)
+{
+        struct net_device *dev = ir_devs[0];
+        struct au1k_private *aup = netdev_priv(dev);
+
+        unregister_netdev(dev);
+
+        dma_free((void *)aup->db[0].vaddr,
+                MAX_BUF_SIZE * 2*NUM_IR_DESC);
+        dma_free((void *)aup->rx_ring[0],
+                2 * MAX_NUM_IR_DESC*(sizeof(ring_dest_t)));
+        kfree(aup->rx_buff.head);
+        free_netdev(dev);
+}
+
+
+static inline void 
+update_tx_stats(struct net_device *dev, u32 status, u32 pkt_len)
+{
+        struct au1k_private *aup = netdev_priv(dev);
+        struct net_device_stats *ps = &aup->stats;
+
+        ps->tx_packets++;
+        ps->tx_bytes += pkt_len;
+
+        if (status & IR_TX_ERROR) {
+                ps->tx_errors++;
+                ps->tx_aborted_errors++;
+        }
+}
+
+
+static void au1k_tx_ack(struct net_device *dev)
+{
+        struct au1k_private *aup = netdev_priv(dev);
+        volatile ring_dest_t *ptxd;
+
+        ptxd = aup->tx_ring[aup->tx_tail];
+        while (!(ptxd->flags & AU_OWN) && (aup->tx_tail != aup->tx_head)) {
+                update_tx_stats(dev, ptxd->flags, 
+                                ptxd->count_1<<8 | ptxd->count_0);
+                ptxd->count_0 = 0;
+                ptxd->count_1 = 0;
+                au_sync();
+
+                aup->tx_tail = (aup->tx_tail + 1) & (NUM_IR_DESC - 1);
+                ptxd = aup->tx_ring[aup->tx_tail];
+
+                if (aup->tx_full) {
+                        aup->tx_full = 0;
+                        netif_wake_queue(dev);
+                }
+        }
+
+        if (aup->tx_tail == aup->tx_head) {
+                if (aup->newspeed) {
+                        au1k_irda_set_speed(dev, aup->newspeed);
+                        aup->newspeed = 0;
+                }
+                else {
+                        writel(read_ir_reg(IR_CONFIG_1) & ~IR_TX_ENABLE, 
+                                        IR_CONFIG_1); 
+                        au_sync();
+                        writel(read_ir_reg(IR_CONFIG_1) | IR_RX_ENABLE, 
+                                        IR_CONFIG_1); 
+                        writel(0, IR_RING_PROMPT);
+                        au_sync();
+                }
+        }
+}
+
+
+/*
+ * Au1000 transmit routine.
+ */
+static int au1k_irda_hard_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+        struct au1k_private *aup = netdev_priv(dev);
+        int speed = irda_get_next_speed(skb);
+        volatile ring_dest_t *ptxd;
+        u32 len;
+
+        u32 flags;
+        db_dest_t *pDB;
+
+        if (speed != aup->speed && speed != -1) {
+                aup->newspeed = speed;
+        }
+
+        if ((skb->len == 0) && (aup->newspeed)) {
+                if (aup->tx_tail == aup->tx_head) {
+                        au1k_irda_set_speed(dev, speed);
+                        aup->newspeed = 0;
+                }
+                dev_kfree_skb(skb);
+                return 0;
+        }
+
+        ptxd = aup->tx_ring[aup->tx_head];
+        flags = ptxd->flags;
+
+        if (flags & AU_OWN) {
+                printk(KERN_DEBUG "%s: tx_full\n", dev->name);
+                netif_stop_queue(dev);
+                aup->tx_full = 1;
+                return 1;
+        }
+        else if (((aup->tx_head + 1) & (NUM_IR_DESC - 1)) == aup->tx_tail) {
+                printk(KERN_DEBUG "%s: tx_full\n", dev->name);
+                netif_stop_queue(dev);
+                aup->tx_full = 1;
+                return 1;
+        }
+
+        pDB = aup->tx_db_inuse[aup->tx_head];
+
+#if 0
+        if (read_ir_reg(IR_RX_BYTE_CNT) != 0) {
+                printk("tx warning: rx byte cnt %x\n", 
+                                read_ir_reg(IR_RX_BYTE_CNT));
+        }
+#endif
+        
+        if (aup->speed == 4000000) {
+                /* FIR */
+                memcpy((void *)pDB->vaddr, skb->data, skb->len);
+                ptxd->count_0 = skb->len & 0xff;
+                ptxd->count_1 = (skb->len >> 8) & 0xff;
+
+        }
+        else {
+                /* SIR */
+                len = async_wrap_skb(skb, (u8 *)pDB->vaddr, MAX_BUF_SIZE);
+                ptxd->count_0 = len & 0xff;
+                ptxd->count_1 = (len >> 8) & 0xff;
+                ptxd->flags |= IR_DIS_CRC;
+                au_writel(au_readl(0xae00000c) & ~(1<<13), 0xae00000c);
+        }
+        ptxd->flags |= AU_OWN;
+        au_sync();
+
+        writel(read_ir_reg(IR_CONFIG_1) | IR_TX_ENABLE, IR_CONFIG_1); 
+        writel(0, IR_RING_PROMPT);
+        au_sync();
+
+        dev_kfree_skb(skb);
+        aup->tx_head = (aup->tx_head + 1) & (NUM_IR_DESC - 1);
+        dev->trans_start = jiffies;
+        return 0;
+}
+
+
+static inline void 
+update_rx_stats(struct net_device *dev, u32 status, u32 count)
+{
+        struct au1k_private *aup = netdev_priv(dev);
+        struct net_device_stats *ps = &aup->stats;
+
+        ps->rx_packets++;
+
+        if (status & IR_RX_ERROR) {
+                ps->rx_errors++;
+                if (status & (IR_PHY_ERROR|IR_FIFO_OVER))
+                        ps->rx_missed_errors++;
+                if (status & IR_MAX_LEN)
+                        ps->rx_length_errors++;
+                if (status & IR_CRC_ERROR)
+                        ps->rx_crc_errors++;
+        }
+        else 
+                ps->rx_bytes += count;
+}
+
+/*
+ * Au1000 receive routine.
+ */
+static int au1k_irda_rx(struct net_device *dev)
+{
+        struct au1k_private *aup = netdev_priv(dev);
+        struct sk_buff *skb;
+        volatile ring_dest_t *prxd;
+        u32 flags, count;
+        db_dest_t *pDB;
+
+        prxd = aup->rx_ring[aup->rx_head];
+        flags = prxd->flags;
+
+        while (!(flags & AU_OWN))  {
+                pDB = aup->rx_db_inuse[aup->rx_head];
+                count = prxd->count_1<<8 | prxd->count_0;
+                if (!(flags & IR_RX_ERROR))  {
+                        /* good frame */
+                        update_rx_stats(dev, flags, count);
+                        skb=alloc_skb(count+1,GFP_ATOMIC);
+                        if (skb == NULL) {
+                                aup->stats.rx_dropped++;
+                                continue;
+                        }
+                        skb_reserve(skb, 1);
+                        if (aup->speed == 4000000)
+                                skb_put(skb, count);
+                        else
+                                skb_put(skb, count-2);
+                        memcpy(skb->data, (void *)pDB->vaddr, count-2);
+                        skb->dev = dev;
+                        skb->mac.raw = skb->data;
+                        skb->protocol = htons(ETH_P_IRDA);
+                        netif_rx(skb);
+                        prxd->count_0 = 0;
+                        prxd->count_1 = 0;
+                }
+                prxd->flags |= AU_OWN;
+                aup->rx_head = (aup->rx_head + 1) & (NUM_IR_DESC - 1);
+                writel(0, IR_RING_PROMPT);
+                au_sync();
+
+                /* next descriptor */
+                prxd = aup->rx_ring[aup->rx_head];
+                flags = prxd->flags;
+                dev->last_rx = jiffies;
+
+        }
+        return 0;
+}
+
+
+void au1k_irda_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+{
+        struct net_device *dev = (struct net_device *) dev_id;
+
+        if (dev == NULL) {
+                printk(KERN_ERR "%s: isr: null dev ptr\n", dev->name);
+                return;
+        }
+
+        writel(0, IR_INT_CLEAR); /* ack irda interrupts */
+
+        au1k_irda_rx(dev);
+        au1k_tx_ack(dev);
+}
+
+
+/*
+ * The Tx ring has been full longer than the watchdog timeout
+ * value. The transmitter must be hung?
+ */
+static void au1k_tx_timeout(struct net_device *dev)
+{
+        u32 speed;
+        struct au1k_private *aup = netdev_priv(dev);
+
+        printk(KERN_ERR "%s: tx timeout\n", dev->name);
+        speed = aup->speed;
+        aup->speed = 0;
+        au1k_irda_set_speed(dev, speed);
+        aup->tx_full = 0;
+        netif_wake_queue(dev);
+}
+
+
+/*
+ * Set the IrDA communications speed.
+ */
+static int 
+au1k_irda_set_speed(struct net_device *dev, int speed)
+{
+        unsigned long flags;
+        struct au1k_private *aup = netdev_priv(dev);
+        u32 control;
+        int ret = 0, timeout = 10, i;
+        volatile ring_dest_t *ptxd;
+#if defined(CONFIG_MIPS_DB1000) || defined(CONFIG_MIPS_DB1100)
+        unsigned long irda_resets;
+#endif
+
+        if (speed == aup->speed)
+                return ret;
+
+        spin_lock_irqsave(&ir_lock, flags);
+
+        /* disable PHY first */
+        writel(read_ir_reg(IR_ENABLE) & ~0x8000, IR_ENABLE);
+
+        /* disable RX/TX */
+        writel(read_ir_reg(IR_CONFIG_1) & ~(IR_RX_ENABLE|IR_TX_ENABLE), 
+                        IR_CONFIG_1);
+        au_sync_delay(1);
+        while (read_ir_reg(IR_ENABLE) & (IR_RX_STATUS | IR_TX_STATUS)) {
+                mdelay(1);
+                if (!timeout--) {
+                        printk(KERN_ERR "%s: rx/tx disable timeout\n",
+                                        dev->name);
+                        break;
+                }
+        }
+
+        /* disable DMA */
+        writel(read_ir_reg(IR_CONFIG_1) & ~IR_DMA_ENABLE, IR_CONFIG_1);
+        au_sync_delay(1);
+
+        /* 
+         *  After we disable tx/rx. the index pointers
+         * go back to zero.
+         */
+        aup->tx_head = aup->tx_tail = aup->rx_head = 0;
+        for (i=0; i<NUM_IR_DESC; i++) {
+                ptxd = aup->tx_ring[i];
+                ptxd->flags = 0;
+                ptxd->count_0 = 0;
+                ptxd->count_1 = 0;
+        }
+
+        for (i=0; i<NUM_IR_DESC; i++) {
+                ptxd = aup->rx_ring[i];
+                ptxd->count_0 = 0;
+                ptxd->count_1 = 0;
+                ptxd->flags = AU_OWN;
+        }
+
+        if (speed == 4000000) {
+#if defined(CONFIG_MIPS_DB1000) || defined(CONFIG_MIPS_DB1100)
+                bcsr->resets |= BCSR_RESETS_FIR_SEL;
+#else /* Pb1000 and Pb1100 */
+                writel(1<<13, CPLD_AUX1);
+#endif
+        }
+        else {
+#if defined(CONFIG_MIPS_DB1000) || defined(CONFIG_MIPS_DB1100)
+                bcsr->resets &= ~BCSR_RESETS_FIR_SEL;
+#else /* Pb1000 and Pb1100 */
+                writel(readl(CPLD_AUX1) & ~(1<<13), CPLD_AUX1);
+#endif
+        }
+
+        switch (speed) {
+        case 9600:      
+                writel(11<<10 | 12<<5, IR_WRITE_PHY_CONFIG); 
+                writel(IR_SIR_MODE, IR_CONFIG_1); 
+                break;
+        case 19200:     
+                writel(5<<10 | 12<<5, IR_WRITE_PHY_CONFIG); 
+                writel(IR_SIR_MODE, IR_CONFIG_1); 
+                break;
+        case 38400:
+                writel(2<<10 | 12<<5, IR_WRITE_PHY_CONFIG); 
+                writel(IR_SIR_MODE, IR_CONFIG_1); 
+                break;
+        case 57600:     
+                writel(1<<10 | 12<<5, IR_WRITE_PHY_CONFIG); 
+                writel(IR_SIR_MODE, IR_CONFIG_1); 
+                break;
+        case 115200: 
+                writel(12<<5, IR_WRITE_PHY_CONFIG); 
+                writel(IR_SIR_MODE, IR_CONFIG_1); 
+                break;
+        case 4000000:
+                writel(0xF, IR_WRITE_PHY_CONFIG);
+                writel(IR_FIR|IR_DMA_ENABLE|IR_RX_ENABLE, IR_CONFIG_1); 
+                break;
+        default:
+                printk(KERN_ERR "%s unsupported speed %x\n", dev->name, speed);
+                ret = -EINVAL;
+                break;
+        }
+
+        aup->speed = speed;
+        writel(read_ir_reg(IR_ENABLE) | 0x8000, IR_ENABLE);
+        au_sync();
+
+        control = read_ir_reg(IR_ENABLE);
+        writel(0, IR_RING_PROMPT);
+        au_sync();
+
+        if (control & (1<<14)) {
+                printk(KERN_ERR "%s: configuration error\n", dev->name);
+        }
+        else {
+                if (control & (1<<11))
+                        printk(KERN_DEBUG "%s Valid SIR config\n", dev->name);
+                if (control & (1<<12))
+                        printk(KERN_DEBUG "%s Valid MIR config\n", dev->name);
+                if (control & (1<<13))
+                        printk(KERN_DEBUG "%s Valid FIR config\n", dev->name);
+                if (control & (1<<10))
+                        printk(KERN_DEBUG "%s TX enabled\n", dev->name);
+                if (control & (1<<9))
+                        printk(KERN_DEBUG "%s RX enabled\n", dev->name);
+        }
+
+        spin_unlock_irqrestore(&ir_lock, flags);
+        return ret;
+}
+
+static int 
+au1k_irda_ioctl(struct net_device *dev, struct ifreq *ifreq, int cmd)
+{
+        struct if_irda_req *rq = (struct if_irda_req *)ifreq;
+        struct au1k_private *aup = netdev_priv(dev);
+        int ret = -EOPNOTSUPP;
+
+        switch (cmd) {
+        case SIOCSBANDWIDTH:
+                if (capable(CAP_NET_ADMIN)) {
+                        /*
+                         * We are unable to set the speed if the
+                         * device is not running.
+                         */
+                        if (aup->open)
+                                ret = au1k_irda_set_speed(dev,
+                                                rq->ifr_baudrate);
+                        else {
+                                printk(KERN_ERR "%s ioctl: !netif_running\n",
+                                                dev->name);
+                                ret = 0;
+                        }
+                }
+                break;
+
+        case SIOCSMEDIABUSY:
+                ret = -EPERM;
+                if (capable(CAP_NET_ADMIN)) {
+                        irda_device_set_media_busy(dev, TRUE);
+                        ret = 0;
+                }
+                break;
+
+        case SIOCGRECEIVING:
+                rq->ifr_receiving = 0;
+                break;
+        default:
+                break;
+        }
+        return ret;
+}
+
+
+static struct net_device_stats *au1k_irda_stats(struct net_device *dev)
+{
+        struct au1k_private *aup = netdev_priv(dev);
+        return &aup->stats;
+}
+
+MODULE_AUTHOR("Pete Popov <ppopov@mvista.com>");
+MODULE_DESCRIPTION("Au1000 IrDA Device Driver");
+
+module_init(au1k_irda_init);
+module_exit(au1k_irda_exit);