![Stephen Hemminger](/assets/img/avatar_default.png)
Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
1367 lines
32 KiB
C
1367 lines
32 KiB
C
/*********************************************************************
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*
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* Filename: w83977af_ir.c
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* Version: 1.0
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* Description: FIR driver for the Winbond W83977AF Super I/O chip
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* Status: Experimental.
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* Author: Paul VanderSpek
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* Created at: Wed Nov 4 11:46:16 1998
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* Modified at: Fri Jan 28 12:10:59 2000
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* Modified by: Dag Brattli <dagb@cs.uit.no>
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*
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* Copyright (c) 1998-2000 Dag Brattli <dagb@cs.uit.no>
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* Copyright (c) 1998-1999 Rebel.com
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* Neither Paul VanderSpek nor Rebel.com admit liability nor provide
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* warranty for any of this software. This material is provided "AS-IS"
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* and at no charge.
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*
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* If you find bugs in this file, its very likely that the same bug
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* will also be in pc87108.c since the implementations are quite
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* similar.
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*
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* Notice that all functions that needs to access the chip in _any_
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* way, must save BSR register on entry, and restore it on exit.
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* It is _very_ important to follow this policy!
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*
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* __u8 bank;
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*
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* bank = inb( iobase+BSR);
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*
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* do_your_stuff_here();
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*
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* outb( bank, iobase+BSR);
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*
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********************************************************************/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/skbuff.h>
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#include <linux/netdevice.h>
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#include <linux/ioport.h>
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#include <linux/delay.h>
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#include <linux/slab.h>
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#include <linux/init.h>
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#include <linux/rtnetlink.h>
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#include <linux/dma-mapping.h>
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#include <asm/io.h>
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#include <asm/dma.h>
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#include <asm/byteorder.h>
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#include <net/irda/irda.h>
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#include <net/irda/wrapper.h>
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#include <net/irda/irda_device.h>
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#include "w83977af.h"
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#include "w83977af_ir.h"
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#ifdef CONFIG_ARCH_NETWINDER /* Adjust to NetWinder differences */
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#undef CONFIG_NETWINDER_TX_DMA_PROBLEMS /* Not needed */
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#define CONFIG_NETWINDER_RX_DMA_PROBLEMS /* Must have this one! */
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#endif
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#undef CONFIG_USE_INTERNAL_TIMER /* Just cannot make that timer work */
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#define CONFIG_USE_W977_PNP /* Currently needed */
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#define PIO_MAX_SPEED 115200
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static char *driver_name = "w83977af_ir";
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static int qos_mtt_bits = 0x07; /* 1 ms or more */
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#define CHIP_IO_EXTENT 8
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static unsigned int io[] = { 0x180, ~0, ~0, ~0 };
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#ifdef CONFIG_ARCH_NETWINDER /* Adjust to NetWinder differences */
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static unsigned int irq[] = { 6, 0, 0, 0 };
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#else
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static unsigned int irq[] = { 11, 0, 0, 0 };
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#endif
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static unsigned int dma[] = { 1, 0, 0, 0 };
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static unsigned int efbase[] = { W977_EFIO_BASE, W977_EFIO2_BASE };
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static unsigned int efio = W977_EFIO_BASE;
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static struct w83977af_ir *dev_self[] = { NULL, NULL, NULL, NULL};
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/* Some prototypes */
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static int w83977af_open(int i, unsigned int iobase, unsigned int irq,
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unsigned int dma);
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static int w83977af_close(struct w83977af_ir *self);
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static int w83977af_probe(int iobase, int irq, int dma);
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static int w83977af_dma_receive(struct w83977af_ir *self);
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static int w83977af_dma_receive_complete(struct w83977af_ir *self);
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static int w83977af_hard_xmit(struct sk_buff *skb, struct net_device *dev);
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static int w83977af_pio_write(int iobase, __u8 *buf, int len, int fifo_size);
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static void w83977af_dma_write(struct w83977af_ir *self, int iobase);
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static void w83977af_change_speed(struct w83977af_ir *self, __u32 speed);
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static int w83977af_is_receiving(struct w83977af_ir *self);
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static int w83977af_net_open(struct net_device *dev);
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static int w83977af_net_close(struct net_device *dev);
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static int w83977af_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
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/*
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* Function w83977af_init ()
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*
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* Initialize chip. Just try to find out how many chips we are dealing with
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* and where they are
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*/
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static int __init w83977af_init(void)
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{
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int i;
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IRDA_DEBUG(0, "%s()\n", __func__ );
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for (i=0; (io[i] < 2000) && (i < ARRAY_SIZE(dev_self)); i++) {
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if (w83977af_open(i, io[i], irq[i], dma[i]) == 0)
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return 0;
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}
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return -ENODEV;
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}
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/*
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* Function w83977af_cleanup ()
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*
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* Close all configured chips
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*
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*/
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static void __exit w83977af_cleanup(void)
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{
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int i;
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IRDA_DEBUG(4, "%s()\n", __func__ );
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for (i=0; i < ARRAY_SIZE(dev_self); i++) {
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if (dev_self[i])
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w83977af_close(dev_self[i]);
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}
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}
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static const struct net_device_ops w83977_netdev_ops = {
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.ndo_open = w83977af_net_open,
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.ndo_stop = w83977af_net_close,
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.ndo_start_xmit = w83977af_hard_xmit,
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.ndo_do_ioctl = w83977af_net_ioctl,
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};
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/*
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* Function w83977af_open (iobase, irq)
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*
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* Open driver instance
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*
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*/
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static int w83977af_open(int i, unsigned int iobase, unsigned int irq,
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unsigned int dma)
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{
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struct net_device *dev;
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struct w83977af_ir *self;
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int err;
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IRDA_DEBUG(0, "%s()\n", __func__ );
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/* Lock the port that we need */
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if (!request_region(iobase, CHIP_IO_EXTENT, driver_name)) {
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IRDA_DEBUG(0, "%s(), can't get iobase of 0x%03x\n",
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__func__ , iobase);
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return -ENODEV;
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}
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if (w83977af_probe(iobase, irq, dma) == -1) {
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err = -1;
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goto err_out;
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}
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/*
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* Allocate new instance of the driver
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*/
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dev = alloc_irdadev(sizeof(struct w83977af_ir));
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if (dev == NULL) {
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printk( KERN_ERR "IrDA: Can't allocate memory for "
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"IrDA control block!\n");
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err = -ENOMEM;
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goto err_out;
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}
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self = netdev_priv(dev);
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spin_lock_init(&self->lock);
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/* Initialize IO */
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self->io.fir_base = iobase;
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self->io.irq = irq;
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self->io.fir_ext = CHIP_IO_EXTENT;
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self->io.dma = dma;
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self->io.fifo_size = 32;
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/* Initialize QoS for this device */
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irda_init_max_qos_capabilies(&self->qos);
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/* The only value we must override it the baudrate */
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/* FIXME: The HP HDLS-1100 does not support 1152000! */
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self->qos.baud_rate.bits = IR_9600|IR_19200|IR_38400|IR_57600|
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IR_115200|IR_576000|IR_1152000|(IR_4000000 << 8);
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/* The HP HDLS-1100 needs 1 ms according to the specs */
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self->qos.min_turn_time.bits = qos_mtt_bits;
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irda_qos_bits_to_value(&self->qos);
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/* Max DMA buffer size needed = (data_size + 6) * (window_size) + 6; */
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self->rx_buff.truesize = 14384;
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self->tx_buff.truesize = 4000;
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/* Allocate memory if needed */
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self->rx_buff.head =
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dma_alloc_coherent(NULL, self->rx_buff.truesize,
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&self->rx_buff_dma, GFP_KERNEL);
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if (self->rx_buff.head == NULL) {
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err = -ENOMEM;
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goto err_out1;
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}
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memset(self->rx_buff.head, 0, self->rx_buff.truesize);
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self->tx_buff.head =
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dma_alloc_coherent(NULL, self->tx_buff.truesize,
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&self->tx_buff_dma, GFP_KERNEL);
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if (self->tx_buff.head == NULL) {
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err = -ENOMEM;
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goto err_out2;
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}
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memset(self->tx_buff.head, 0, self->tx_buff.truesize);
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self->rx_buff.in_frame = FALSE;
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self->rx_buff.state = OUTSIDE_FRAME;
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self->tx_buff.data = self->tx_buff.head;
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self->rx_buff.data = self->rx_buff.head;
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self->netdev = dev;
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dev->netdev_ops = &w83977_netdev_ops;
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err = register_netdev(dev);
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if (err) {
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IRDA_ERROR("%s(), register_netdevice() failed!\n", __func__);
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goto err_out3;
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}
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IRDA_MESSAGE("IrDA: Registered device %s\n", dev->name);
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/* Need to store self somewhere */
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dev_self[i] = self;
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return 0;
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err_out3:
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dma_free_coherent(NULL, self->tx_buff.truesize,
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self->tx_buff.head, self->tx_buff_dma);
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err_out2:
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dma_free_coherent(NULL, self->rx_buff.truesize,
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self->rx_buff.head, self->rx_buff_dma);
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err_out1:
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free_netdev(dev);
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err_out:
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release_region(iobase, CHIP_IO_EXTENT);
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return err;
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}
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/*
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* Function w83977af_close (self)
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*
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* Close driver instance
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*
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*/
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static int w83977af_close(struct w83977af_ir *self)
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{
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int iobase;
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IRDA_DEBUG(0, "%s()\n", __func__ );
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iobase = self->io.fir_base;
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#ifdef CONFIG_USE_W977_PNP
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/* enter PnP configuration mode */
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w977_efm_enter(efio);
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w977_select_device(W977_DEVICE_IR, efio);
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/* Deactivate device */
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w977_write_reg(0x30, 0x00, efio);
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w977_efm_exit(efio);
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#endif /* CONFIG_USE_W977_PNP */
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/* Remove netdevice */
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unregister_netdev(self->netdev);
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/* Release the PORT that this driver is using */
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IRDA_DEBUG(0 , "%s(), Releasing Region %03x\n",
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__func__ , self->io.fir_base);
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release_region(self->io.fir_base, self->io.fir_ext);
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if (self->tx_buff.head)
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dma_free_coherent(NULL, self->tx_buff.truesize,
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self->tx_buff.head, self->tx_buff_dma);
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if (self->rx_buff.head)
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dma_free_coherent(NULL, self->rx_buff.truesize,
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self->rx_buff.head, self->rx_buff_dma);
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free_netdev(self->netdev);
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return 0;
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}
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static int w83977af_probe(int iobase, int irq, int dma)
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{
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int version;
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int i;
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for (i=0; i < 2; i++) {
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IRDA_DEBUG( 0, "%s()\n", __func__ );
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#ifdef CONFIG_USE_W977_PNP
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/* Enter PnP configuration mode */
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w977_efm_enter(efbase[i]);
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w977_select_device(W977_DEVICE_IR, efbase[i]);
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/* Configure PnP port, IRQ, and DMA channel */
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w977_write_reg(0x60, (iobase >> 8) & 0xff, efbase[i]);
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w977_write_reg(0x61, (iobase) & 0xff, efbase[i]);
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w977_write_reg(0x70, irq, efbase[i]);
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#ifdef CONFIG_ARCH_NETWINDER
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/* Netwinder uses 1 higher than Linux */
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w977_write_reg(0x74, dma+1, efbase[i]);
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#else
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w977_write_reg(0x74, dma, efbase[i]);
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#endif /*CONFIG_ARCH_NETWINDER */
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w977_write_reg(0x75, 0x04, efbase[i]); /* Disable Tx DMA */
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/* Set append hardware CRC, enable IR bank selection */
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w977_write_reg(0xf0, APEDCRC|ENBNKSEL, efbase[i]);
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/* Activate device */
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w977_write_reg(0x30, 0x01, efbase[i]);
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w977_efm_exit(efbase[i]);
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#endif /* CONFIG_USE_W977_PNP */
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/* Disable Advanced mode */
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switch_bank(iobase, SET2);
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outb(iobase+2, 0x00);
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/* Turn on UART (global) interrupts */
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switch_bank(iobase, SET0);
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outb(HCR_EN_IRQ, iobase+HCR);
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/* Switch to advanced mode */
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switch_bank(iobase, SET2);
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outb(inb(iobase+ADCR1) | ADCR1_ADV_SL, iobase+ADCR1);
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/* Set default IR-mode */
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switch_bank(iobase, SET0);
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outb(HCR_SIR, iobase+HCR);
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/* Read the Advanced IR ID */
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switch_bank(iobase, SET3);
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version = inb(iobase+AUID);
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/* Should be 0x1? */
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if (0x10 == (version & 0xf0)) {
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efio = efbase[i];
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/* Set FIFO size to 32 */
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switch_bank(iobase, SET2);
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outb(ADCR2_RXFS32|ADCR2_TXFS32, iobase+ADCR2);
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/* Set FIFO threshold to TX17, RX16 */
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switch_bank(iobase, SET0);
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outb(UFR_RXTL|UFR_TXTL|UFR_TXF_RST|UFR_RXF_RST|
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UFR_EN_FIFO,iobase+UFR);
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/* Receiver frame length */
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switch_bank(iobase, SET4);
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outb(2048 & 0xff, iobase+6);
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outb((2048 >> 8) & 0x1f, iobase+7);
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/*
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* Init HP HSDL-1100 transceiver.
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*
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* Set IRX_MSL since we have 2 * receive paths IRRX,
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* and IRRXH. Clear IRSL0D since we want IRSL0 * to
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* be a input pin used for IRRXH
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*
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* IRRX pin 37 connected to receiver
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* IRTX pin 38 connected to transmitter
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* FIRRX pin 39 connected to receiver (IRSL0)
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* CIRRX pin 40 connected to pin 37
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*/
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switch_bank(iobase, SET7);
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outb(0x40, iobase+7);
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IRDA_MESSAGE("W83977AF (IR) driver loaded. "
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"Version: 0x%02x\n", version);
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return 0;
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} else {
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/* Try next extented function register address */
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IRDA_DEBUG( 0, "%s(), Wrong chip version", __func__ );
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}
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}
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return -1;
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}
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static void w83977af_change_speed(struct w83977af_ir *self, __u32 speed)
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{
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int ir_mode = HCR_SIR;
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int iobase;
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__u8 set;
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iobase = self->io.fir_base;
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/* Update accounting for new speed */
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self->io.speed = speed;
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/* Save current bank */
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set = inb(iobase+SSR);
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/* Disable interrupts */
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switch_bank(iobase, SET0);
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outb(0, iobase+ICR);
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/* Select Set 2 */
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switch_bank(iobase, SET2);
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outb(0x00, iobase+ABHL);
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switch (speed) {
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case 9600: outb(0x0c, iobase+ABLL); break;
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case 19200: outb(0x06, iobase+ABLL); break;
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case 38400: outb(0x03, iobase+ABLL); break;
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case 57600: outb(0x02, iobase+ABLL); break;
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case 115200: outb(0x01, iobase+ABLL); break;
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case 576000:
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ir_mode = HCR_MIR_576;
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IRDA_DEBUG(0, "%s(), handling baud of 576000\n", __func__ );
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break;
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case 1152000:
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ir_mode = HCR_MIR_1152;
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IRDA_DEBUG(0, "%s(), handling baud of 1152000\n", __func__ );
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break;
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case 4000000:
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ir_mode = HCR_FIR;
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IRDA_DEBUG(0, "%s(), handling baud of 4000000\n", __func__ );
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break;
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default:
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ir_mode = HCR_FIR;
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IRDA_DEBUG(0, "%s(), unknown baud rate of %d\n", __func__ , speed);
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break;
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}
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/* Set speed mode */
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switch_bank(iobase, SET0);
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outb(ir_mode, iobase+HCR);
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|
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/* set FIFO size to 32 */
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switch_bank(iobase, SET2);
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outb(ADCR2_RXFS32|ADCR2_TXFS32, iobase+ADCR2);
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/* set FIFO threshold to TX17, RX16 */
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switch_bank(iobase, SET0);
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outb(0x00, iobase+UFR); /* Reset */
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outb(UFR_EN_FIFO, iobase+UFR); /* First we must enable FIFO */
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outb(0xa7, iobase+UFR);
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|
|
netif_wake_queue(self->netdev);
|
|
|
|
/* Enable some interrupts so we can receive frames */
|
|
switch_bank(iobase, SET0);
|
|
if (speed > PIO_MAX_SPEED) {
|
|
outb(ICR_EFSFI, iobase+ICR);
|
|
w83977af_dma_receive(self);
|
|
} else
|
|
outb(ICR_ERBRI, iobase+ICR);
|
|
|
|
/* Restore SSR */
|
|
outb(set, iobase+SSR);
|
|
}
|
|
|
|
/*
|
|
* Function w83977af_hard_xmit (skb, dev)
|
|
*
|
|
* Sets up a DMA transfer to send the current frame.
|
|
*
|
|
*/
|
|
static int w83977af_hard_xmit(struct sk_buff *skb, struct net_device *dev)
|
|
{
|
|
struct w83977af_ir *self;
|
|
__s32 speed;
|
|
int iobase;
|
|
__u8 set;
|
|
int mtt;
|
|
|
|
self = netdev_priv(dev);
|
|
|
|
iobase = self->io.fir_base;
|
|
|
|
IRDA_DEBUG(4, "%s(%ld), skb->len=%d\n", __func__ , jiffies,
|
|
(int) skb->len);
|
|
|
|
/* Lock transmit buffer */
|
|
netif_stop_queue(dev);
|
|
|
|
/* Check if we need to change the speed */
|
|
speed = irda_get_next_speed(skb);
|
|
if ((speed != self->io.speed) && (speed != -1)) {
|
|
/* Check for empty frame */
|
|
if (!skb->len) {
|
|
w83977af_change_speed(self, speed);
|
|
dev->trans_start = jiffies;
|
|
dev_kfree_skb(skb);
|
|
return 0;
|
|
} else
|
|
self->new_speed = speed;
|
|
}
|
|
|
|
/* Save current set */
|
|
set = inb(iobase+SSR);
|
|
|
|
/* Decide if we should use PIO or DMA transfer */
|
|
if (self->io.speed > PIO_MAX_SPEED) {
|
|
self->tx_buff.data = self->tx_buff.head;
|
|
skb_copy_from_linear_data(skb, self->tx_buff.data, skb->len);
|
|
self->tx_buff.len = skb->len;
|
|
|
|
mtt = irda_get_mtt(skb);
|
|
#ifdef CONFIG_USE_INTERNAL_TIMER
|
|
if (mtt > 50) {
|
|
/* Adjust for timer resolution */
|
|
mtt /= 1000+1;
|
|
|
|
/* Setup timer */
|
|
switch_bank(iobase, SET4);
|
|
outb(mtt & 0xff, iobase+TMRL);
|
|
outb((mtt >> 8) & 0x0f, iobase+TMRH);
|
|
|
|
/* Start timer */
|
|
outb(IR_MSL_EN_TMR, iobase+IR_MSL);
|
|
self->io.direction = IO_XMIT;
|
|
|
|
/* Enable timer interrupt */
|
|
switch_bank(iobase, SET0);
|
|
outb(ICR_ETMRI, iobase+ICR);
|
|
} else {
|
|
#endif
|
|
IRDA_DEBUG(4, "%s(%ld), mtt=%d\n", __func__ , jiffies, mtt);
|
|
if (mtt)
|
|
udelay(mtt);
|
|
|
|
/* Enable DMA interrupt */
|
|
switch_bank(iobase, SET0);
|
|
outb(ICR_EDMAI, iobase+ICR);
|
|
w83977af_dma_write(self, iobase);
|
|
#ifdef CONFIG_USE_INTERNAL_TIMER
|
|
}
|
|
#endif
|
|
} else {
|
|
self->tx_buff.data = self->tx_buff.head;
|
|
self->tx_buff.len = async_wrap_skb(skb, self->tx_buff.data,
|
|
self->tx_buff.truesize);
|
|
|
|
/* Add interrupt on tx low level (will fire immediately) */
|
|
switch_bank(iobase, SET0);
|
|
outb(ICR_ETXTHI, iobase+ICR);
|
|
}
|
|
dev->trans_start = jiffies;
|
|
dev_kfree_skb(skb);
|
|
|
|
/* Restore set register */
|
|
outb(set, iobase+SSR);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Function w83977af_dma_write (self, iobase)
|
|
*
|
|
* Send frame using DMA
|
|
*
|
|
*/
|
|
static void w83977af_dma_write(struct w83977af_ir *self, int iobase)
|
|
{
|
|
__u8 set;
|
|
#ifdef CONFIG_NETWINDER_TX_DMA_PROBLEMS
|
|
unsigned long flags;
|
|
__u8 hcr;
|
|
#endif
|
|
IRDA_DEBUG(4, "%s(), len=%d\n", __func__ , self->tx_buff.len);
|
|
|
|
/* Save current set */
|
|
set = inb(iobase+SSR);
|
|
|
|
/* Disable DMA */
|
|
switch_bank(iobase, SET0);
|
|
outb(inb(iobase+HCR) & ~HCR_EN_DMA, iobase+HCR);
|
|
|
|
/* Choose transmit DMA channel */
|
|
switch_bank(iobase, SET2);
|
|
outb(ADCR1_D_CHSW|/*ADCR1_DMA_F|*/ADCR1_ADV_SL, iobase+ADCR1);
|
|
#ifdef CONFIG_NETWINDER_TX_DMA_PROBLEMS
|
|
spin_lock_irqsave(&self->lock, flags);
|
|
|
|
disable_dma(self->io.dma);
|
|
clear_dma_ff(self->io.dma);
|
|
set_dma_mode(self->io.dma, DMA_MODE_READ);
|
|
set_dma_addr(self->io.dma, self->tx_buff_dma);
|
|
set_dma_count(self->io.dma, self->tx_buff.len);
|
|
#else
|
|
irda_setup_dma(self->io.dma, self->tx_buff_dma, self->tx_buff.len,
|
|
DMA_MODE_WRITE);
|
|
#endif
|
|
self->io.direction = IO_XMIT;
|
|
|
|
/* Enable DMA */
|
|
switch_bank(iobase, SET0);
|
|
#ifdef CONFIG_NETWINDER_TX_DMA_PROBLEMS
|
|
hcr = inb(iobase+HCR);
|
|
outb(hcr | HCR_EN_DMA, iobase+HCR);
|
|
enable_dma(self->io.dma);
|
|
spin_unlock_irqrestore(&self->lock, flags);
|
|
#else
|
|
outb(inb(iobase+HCR) | HCR_EN_DMA | HCR_TX_WT, iobase+HCR);
|
|
#endif
|
|
|
|
/* Restore set register */
|
|
outb(set, iobase+SSR);
|
|
}
|
|
|
|
/*
|
|
* Function w83977af_pio_write (iobase, buf, len, fifo_size)
|
|
*
|
|
*
|
|
*
|
|
*/
|
|
static int w83977af_pio_write(int iobase, __u8 *buf, int len, int fifo_size)
|
|
{
|
|
int actual = 0;
|
|
__u8 set;
|
|
|
|
IRDA_DEBUG(4, "%s()\n", __func__ );
|
|
|
|
/* Save current bank */
|
|
set = inb(iobase+SSR);
|
|
|
|
switch_bank(iobase, SET0);
|
|
if (!(inb_p(iobase+USR) & USR_TSRE)) {
|
|
IRDA_DEBUG(4,
|
|
"%s(), warning, FIFO not empty yet!\n", __func__ );
|
|
|
|
fifo_size -= 17;
|
|
IRDA_DEBUG(4, "%s(), %d bytes left in tx fifo\n",
|
|
__func__ , fifo_size);
|
|
}
|
|
|
|
/* Fill FIFO with current frame */
|
|
while ((fifo_size-- > 0) && (actual < len)) {
|
|
/* Transmit next byte */
|
|
outb(buf[actual++], iobase+TBR);
|
|
}
|
|
|
|
IRDA_DEBUG(4, "%s(), fifo_size %d ; %d sent of %d\n",
|
|
__func__ , fifo_size, actual, len);
|
|
|
|
/* Restore bank */
|
|
outb(set, iobase+SSR);
|
|
|
|
return actual;
|
|
}
|
|
|
|
/*
|
|
* Function w83977af_dma_xmit_complete (self)
|
|
*
|
|
* The transfer of a frame in finished. So do the necessary things
|
|
*
|
|
*
|
|
*/
|
|
static void w83977af_dma_xmit_complete(struct w83977af_ir *self)
|
|
{
|
|
int iobase;
|
|
__u8 set;
|
|
|
|
IRDA_DEBUG(4, "%s(%ld)\n", __func__ , jiffies);
|
|
|
|
IRDA_ASSERT(self != NULL, return;);
|
|
|
|
iobase = self->io.fir_base;
|
|
|
|
/* Save current set */
|
|
set = inb(iobase+SSR);
|
|
|
|
/* Disable DMA */
|
|
switch_bank(iobase, SET0);
|
|
outb(inb(iobase+HCR) & ~HCR_EN_DMA, iobase+HCR);
|
|
|
|
/* Check for underrrun! */
|
|
if (inb(iobase+AUDR) & AUDR_UNDR) {
|
|
IRDA_DEBUG(0, "%s(), Transmit underrun!\n", __func__ );
|
|
|
|
self->netdev->stats.tx_errors++;
|
|
self->netdev->stats.tx_fifo_errors++;
|
|
|
|
/* Clear bit, by writing 1 to it */
|
|
outb(AUDR_UNDR, iobase+AUDR);
|
|
} else
|
|
self->netdev->stats.tx_packets++;
|
|
|
|
|
|
if (self->new_speed) {
|
|
w83977af_change_speed(self, self->new_speed);
|
|
self->new_speed = 0;
|
|
}
|
|
|
|
/* Unlock tx_buff and request another frame */
|
|
/* Tell the network layer, that we want more frames */
|
|
netif_wake_queue(self->netdev);
|
|
|
|
/* Restore set */
|
|
outb(set, iobase+SSR);
|
|
}
|
|
|
|
/*
|
|
* Function w83977af_dma_receive (self)
|
|
*
|
|
* Get ready for receiving a frame. The device will initiate a DMA
|
|
* if it starts to receive a frame.
|
|
*
|
|
*/
|
|
static int w83977af_dma_receive(struct w83977af_ir *self)
|
|
{
|
|
int iobase;
|
|
__u8 set;
|
|
#ifdef CONFIG_NETWINDER_RX_DMA_PROBLEMS
|
|
unsigned long flags;
|
|
__u8 hcr;
|
|
#endif
|
|
IRDA_ASSERT(self != NULL, return -1;);
|
|
|
|
IRDA_DEBUG(4, "%s\n", __func__ );
|
|
|
|
iobase= self->io.fir_base;
|
|
|
|
/* Save current set */
|
|
set = inb(iobase+SSR);
|
|
|
|
/* Disable DMA */
|
|
switch_bank(iobase, SET0);
|
|
outb(inb(iobase+HCR) & ~HCR_EN_DMA, iobase+HCR);
|
|
|
|
/* Choose DMA Rx, DMA Fairness, and Advanced mode */
|
|
switch_bank(iobase, SET2);
|
|
outb((inb(iobase+ADCR1) & ~ADCR1_D_CHSW)/*|ADCR1_DMA_F*/|ADCR1_ADV_SL,
|
|
iobase+ADCR1);
|
|
|
|
self->io.direction = IO_RECV;
|
|
self->rx_buff.data = self->rx_buff.head;
|
|
|
|
#ifdef CONFIG_NETWINDER_RX_DMA_PROBLEMS
|
|
spin_lock_irqsave(&self->lock, flags);
|
|
|
|
disable_dma(self->io.dma);
|
|
clear_dma_ff(self->io.dma);
|
|
set_dma_mode(self->io.dma, DMA_MODE_READ);
|
|
set_dma_addr(self->io.dma, self->rx_buff_dma);
|
|
set_dma_count(self->io.dma, self->rx_buff.truesize);
|
|
#else
|
|
irda_setup_dma(self->io.dma, self->rx_buff_dma, self->rx_buff.truesize,
|
|
DMA_MODE_READ);
|
|
#endif
|
|
/*
|
|
* Reset Rx FIFO. This will also flush the ST_FIFO, it's very
|
|
* important that we don't reset the Tx FIFO since it might not
|
|
* be finished transmitting yet
|
|
*/
|
|
switch_bank(iobase, SET0);
|
|
outb(UFR_RXTL|UFR_TXTL|UFR_RXF_RST|UFR_EN_FIFO, iobase+UFR);
|
|
self->st_fifo.len = self->st_fifo.tail = self->st_fifo.head = 0;
|
|
|
|
/* Enable DMA */
|
|
switch_bank(iobase, SET0);
|
|
#ifdef CONFIG_NETWINDER_RX_DMA_PROBLEMS
|
|
hcr = inb(iobase+HCR);
|
|
outb(hcr | HCR_EN_DMA, iobase+HCR);
|
|
enable_dma(self->io.dma);
|
|
spin_unlock_irqrestore(&self->lock, flags);
|
|
#else
|
|
outb(inb(iobase+HCR) | HCR_EN_DMA, iobase+HCR);
|
|
#endif
|
|
/* Restore set */
|
|
outb(set, iobase+SSR);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Function w83977af_receive_complete (self)
|
|
*
|
|
* Finished with receiving a frame
|
|
*
|
|
*/
|
|
static int w83977af_dma_receive_complete(struct w83977af_ir *self)
|
|
{
|
|
struct sk_buff *skb;
|
|
struct st_fifo *st_fifo;
|
|
int len;
|
|
int iobase;
|
|
__u8 set;
|
|
__u8 status;
|
|
|
|
IRDA_DEBUG(4, "%s\n", __func__ );
|
|
|
|
st_fifo = &self->st_fifo;
|
|
|
|
iobase = self->io.fir_base;
|
|
|
|
/* Save current set */
|
|
set = inb(iobase+SSR);
|
|
|
|
iobase = self->io.fir_base;
|
|
|
|
/* Read status FIFO */
|
|
switch_bank(iobase, SET5);
|
|
while ((status = inb(iobase+FS_FO)) & FS_FO_FSFDR) {
|
|
st_fifo->entries[st_fifo->tail].status = status;
|
|
|
|
st_fifo->entries[st_fifo->tail].len = inb(iobase+RFLFL);
|
|
st_fifo->entries[st_fifo->tail].len |= inb(iobase+RFLFH) << 8;
|
|
|
|
st_fifo->tail++;
|
|
st_fifo->len++;
|
|
}
|
|
|
|
while (st_fifo->len) {
|
|
/* Get first entry */
|
|
status = st_fifo->entries[st_fifo->head].status;
|
|
len = st_fifo->entries[st_fifo->head].len;
|
|
st_fifo->head++;
|
|
st_fifo->len--;
|
|
|
|
/* Check for errors */
|
|
if (status & FS_FO_ERR_MSK) {
|
|
if (status & FS_FO_LST_FR) {
|
|
/* Add number of lost frames to stats */
|
|
self->netdev->stats.rx_errors += len;
|
|
} else {
|
|
/* Skip frame */
|
|
self->netdev->stats.rx_errors++;
|
|
|
|
self->rx_buff.data += len;
|
|
|
|
if (status & FS_FO_MX_LEX)
|
|
self->netdev->stats.rx_length_errors++;
|
|
|
|
if (status & FS_FO_PHY_ERR)
|
|
self->netdev->stats.rx_frame_errors++;
|
|
|
|
if (status & FS_FO_CRC_ERR)
|
|
self->netdev->stats.rx_crc_errors++;
|
|
}
|
|
/* The errors below can be reported in both cases */
|
|
if (status & FS_FO_RX_OV)
|
|
self->netdev->stats.rx_fifo_errors++;
|
|
|
|
if (status & FS_FO_FSF_OV)
|
|
self->netdev->stats.rx_fifo_errors++;
|
|
|
|
} else {
|
|
/* Check if we have transferred all data to memory */
|
|
switch_bank(iobase, SET0);
|
|
if (inb(iobase+USR) & USR_RDR) {
|
|
#ifdef CONFIG_USE_INTERNAL_TIMER
|
|
/* Put this entry back in fifo */
|
|
st_fifo->head--;
|
|
st_fifo->len++;
|
|
st_fifo->entries[st_fifo->head].status = status;
|
|
st_fifo->entries[st_fifo->head].len = len;
|
|
|
|
/* Restore set register */
|
|
outb(set, iobase+SSR);
|
|
|
|
return FALSE; /* I'll be back! */
|
|
#else
|
|
udelay(80); /* Should be enough!? */
|
|
#endif
|
|
}
|
|
|
|
skb = dev_alloc_skb(len+1);
|
|
if (skb == NULL) {
|
|
printk(KERN_INFO
|
|
"%s(), memory squeeze, dropping frame.\n", __func__);
|
|
/* Restore set register */
|
|
outb(set, iobase+SSR);
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
/* Align to 20 bytes */
|
|
skb_reserve(skb, 1);
|
|
|
|
/* Copy frame without CRC */
|
|
if (self->io.speed < 4000000) {
|
|
skb_put(skb, len-2);
|
|
skb_copy_to_linear_data(skb,
|
|
self->rx_buff.data,
|
|
len - 2);
|
|
} else {
|
|
skb_put(skb, len-4);
|
|
skb_copy_to_linear_data(skb,
|
|
self->rx_buff.data,
|
|
len - 4);
|
|
}
|
|
|
|
/* Move to next frame */
|
|
self->rx_buff.data += len;
|
|
self->netdev->stats.rx_packets++;
|
|
|
|
skb->dev = self->netdev;
|
|
skb_reset_mac_header(skb);
|
|
skb->protocol = htons(ETH_P_IRDA);
|
|
netif_rx(skb);
|
|
}
|
|
}
|
|
/* Restore set register */
|
|
outb(set, iobase+SSR);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/*
|
|
* Function pc87108_pio_receive (self)
|
|
*
|
|
* Receive all data in receiver FIFO
|
|
*
|
|
*/
|
|
static void w83977af_pio_receive(struct w83977af_ir *self)
|
|
{
|
|
__u8 byte = 0x00;
|
|
int iobase;
|
|
|
|
IRDA_DEBUG(4, "%s()\n", __func__ );
|
|
|
|
IRDA_ASSERT(self != NULL, return;);
|
|
|
|
iobase = self->io.fir_base;
|
|
|
|
/* Receive all characters in Rx FIFO */
|
|
do {
|
|
byte = inb(iobase+RBR);
|
|
async_unwrap_char(self->netdev, &self->netdev->stats, &self->rx_buff,
|
|
byte);
|
|
} while (inb(iobase+USR) & USR_RDR); /* Data available */
|
|
}
|
|
|
|
/*
|
|
* Function w83977af_sir_interrupt (self, eir)
|
|
*
|
|
* Handle SIR interrupt
|
|
*
|
|
*/
|
|
static __u8 w83977af_sir_interrupt(struct w83977af_ir *self, int isr)
|
|
{
|
|
int actual;
|
|
__u8 new_icr = 0;
|
|
__u8 set;
|
|
int iobase;
|
|
|
|
IRDA_DEBUG(4, "%s(), isr=%#x\n", __func__ , isr);
|
|
|
|
iobase = self->io.fir_base;
|
|
/* Transmit FIFO low on data */
|
|
if (isr & ISR_TXTH_I) {
|
|
/* Write data left in transmit buffer */
|
|
actual = w83977af_pio_write(self->io.fir_base,
|
|
self->tx_buff.data,
|
|
self->tx_buff.len,
|
|
self->io.fifo_size);
|
|
|
|
self->tx_buff.data += actual;
|
|
self->tx_buff.len -= actual;
|
|
|
|
self->io.direction = IO_XMIT;
|
|
|
|
/* Check if finished */
|
|
if (self->tx_buff.len > 0) {
|
|
new_icr |= ICR_ETXTHI;
|
|
} else {
|
|
set = inb(iobase+SSR);
|
|
switch_bank(iobase, SET0);
|
|
outb(AUDR_SFEND, iobase+AUDR);
|
|
outb(set, iobase+SSR);
|
|
|
|
self->netdev->stats.tx_packets++;
|
|
|
|
/* Feed me more packets */
|
|
netif_wake_queue(self->netdev);
|
|
new_icr |= ICR_ETBREI;
|
|
}
|
|
}
|
|
/* Check if transmission has completed */
|
|
if (isr & ISR_TXEMP_I) {
|
|
/* Check if we need to change the speed? */
|
|
if (self->new_speed) {
|
|
IRDA_DEBUG(2,
|
|
"%s(), Changing speed!\n", __func__ );
|
|
w83977af_change_speed(self, self->new_speed);
|
|
self->new_speed = 0;
|
|
}
|
|
|
|
/* Turn around and get ready to receive some data */
|
|
self->io.direction = IO_RECV;
|
|
new_icr |= ICR_ERBRI;
|
|
}
|
|
|
|
/* Rx FIFO threshold or timeout */
|
|
if (isr & ISR_RXTH_I) {
|
|
w83977af_pio_receive(self);
|
|
|
|
/* Keep receiving */
|
|
new_icr |= ICR_ERBRI;
|
|
}
|
|
return new_icr;
|
|
}
|
|
|
|
/*
|
|
* Function pc87108_fir_interrupt (self, eir)
|
|
*
|
|
* Handle MIR/FIR interrupt
|
|
*
|
|
*/
|
|
static __u8 w83977af_fir_interrupt(struct w83977af_ir *self, int isr)
|
|
{
|
|
__u8 new_icr = 0;
|
|
__u8 set;
|
|
int iobase;
|
|
|
|
iobase = self->io.fir_base;
|
|
set = inb(iobase+SSR);
|
|
|
|
/* End of frame detected in FIFO */
|
|
if (isr & (ISR_FEND_I|ISR_FSF_I)) {
|
|
if (w83977af_dma_receive_complete(self)) {
|
|
|
|
/* Wait for next status FIFO interrupt */
|
|
new_icr |= ICR_EFSFI;
|
|
} else {
|
|
/* DMA not finished yet */
|
|
|
|
/* Set timer value, resolution 1 ms */
|
|
switch_bank(iobase, SET4);
|
|
outb(0x01, iobase+TMRL); /* 1 ms */
|
|
outb(0x00, iobase+TMRH);
|
|
|
|
/* Start timer */
|
|
outb(IR_MSL_EN_TMR, iobase+IR_MSL);
|
|
|
|
new_icr |= ICR_ETMRI;
|
|
}
|
|
}
|
|
/* Timer finished */
|
|
if (isr & ISR_TMR_I) {
|
|
/* Disable timer */
|
|
switch_bank(iobase, SET4);
|
|
outb(0, iobase+IR_MSL);
|
|
|
|
/* Clear timer event */
|
|
/* switch_bank(iobase, SET0); */
|
|
/* outb(ASCR_CTE, iobase+ASCR); */
|
|
|
|
/* Check if this is a TX timer interrupt */
|
|
if (self->io.direction == IO_XMIT) {
|
|
w83977af_dma_write(self, iobase);
|
|
|
|
new_icr |= ICR_EDMAI;
|
|
} else {
|
|
/* Check if DMA has now finished */
|
|
w83977af_dma_receive_complete(self);
|
|
|
|
new_icr |= ICR_EFSFI;
|
|
}
|
|
}
|
|
/* Finished with DMA */
|
|
if (isr & ISR_DMA_I) {
|
|
w83977af_dma_xmit_complete(self);
|
|
|
|
/* Check if there are more frames to be transmitted */
|
|
/* if (irda_device_txqueue_empty(self)) { */
|
|
|
|
/* Prepare for receive
|
|
*
|
|
* ** Netwinder Tx DMA likes that we do this anyway **
|
|
*/
|
|
w83977af_dma_receive(self);
|
|
new_icr = ICR_EFSFI;
|
|
/* } */
|
|
}
|
|
|
|
/* Restore set */
|
|
outb(set, iobase+SSR);
|
|
|
|
return new_icr;
|
|
}
|
|
|
|
/*
|
|
* Function w83977af_interrupt (irq, dev_id, regs)
|
|
*
|
|
* An interrupt from the chip has arrived. Time to do some work
|
|
*
|
|
*/
|
|
static irqreturn_t w83977af_interrupt(int irq, void *dev_id)
|
|
{
|
|
struct net_device *dev = dev_id;
|
|
struct w83977af_ir *self;
|
|
__u8 set, icr, isr;
|
|
int iobase;
|
|
|
|
self = netdev_priv(dev);
|
|
|
|
iobase = self->io.fir_base;
|
|
|
|
/* Save current bank */
|
|
set = inb(iobase+SSR);
|
|
switch_bank(iobase, SET0);
|
|
|
|
icr = inb(iobase+ICR);
|
|
isr = inb(iobase+ISR) & icr; /* Mask out the interesting ones */
|
|
|
|
outb(0, iobase+ICR); /* Disable interrupts */
|
|
|
|
if (isr) {
|
|
/* Dispatch interrupt handler for the current speed */
|
|
if (self->io.speed > PIO_MAX_SPEED )
|
|
icr = w83977af_fir_interrupt(self, isr);
|
|
else
|
|
icr = w83977af_sir_interrupt(self, isr);
|
|
}
|
|
|
|
outb(icr, iobase+ICR); /* Restore (new) interrupts */
|
|
outb(set, iobase+SSR); /* Restore bank register */
|
|
return IRQ_RETVAL(isr);
|
|
}
|
|
|
|
/*
|
|
* Function w83977af_is_receiving (self)
|
|
*
|
|
* Return TRUE is we are currently receiving a frame
|
|
*
|
|
*/
|
|
static int w83977af_is_receiving(struct w83977af_ir *self)
|
|
{
|
|
int status = FALSE;
|
|
int iobase;
|
|
__u8 set;
|
|
|
|
IRDA_ASSERT(self != NULL, return FALSE;);
|
|
|
|
if (self->io.speed > 115200) {
|
|
iobase = self->io.fir_base;
|
|
|
|
/* Check if rx FIFO is not empty */
|
|
set = inb(iobase+SSR);
|
|
switch_bank(iobase, SET2);
|
|
if ((inb(iobase+RXFDTH) & 0x3f) != 0) {
|
|
/* We are receiving something */
|
|
status = TRUE;
|
|
}
|
|
outb(set, iobase+SSR);
|
|
} else
|
|
status = (self->rx_buff.state != OUTSIDE_FRAME);
|
|
|
|
return status;
|
|
}
|
|
|
|
/*
|
|
* Function w83977af_net_open (dev)
|
|
*
|
|
* Start the device
|
|
*
|
|
*/
|
|
static int w83977af_net_open(struct net_device *dev)
|
|
{
|
|
struct w83977af_ir *self;
|
|
int iobase;
|
|
char hwname[32];
|
|
__u8 set;
|
|
|
|
IRDA_DEBUG(0, "%s()\n", __func__ );
|
|
|
|
IRDA_ASSERT(dev != NULL, return -1;);
|
|
self = netdev_priv(dev);
|
|
|
|
IRDA_ASSERT(self != NULL, return 0;);
|
|
|
|
iobase = self->io.fir_base;
|
|
|
|
if (request_irq(self->io.irq, w83977af_interrupt, 0, dev->name,
|
|
(void *) dev)) {
|
|
return -EAGAIN;
|
|
}
|
|
/*
|
|
* Always allocate the DMA channel after the IRQ,
|
|
* and clean up on failure.
|
|
*/
|
|
if (request_dma(self->io.dma, dev->name)) {
|
|
free_irq(self->io.irq, self);
|
|
return -EAGAIN;
|
|
}
|
|
|
|
/* Save current set */
|
|
set = inb(iobase+SSR);
|
|
|
|
/* Enable some interrupts so we can receive frames again */
|
|
switch_bank(iobase, SET0);
|
|
if (self->io.speed > 115200) {
|
|
outb(ICR_EFSFI, iobase+ICR);
|
|
w83977af_dma_receive(self);
|
|
} else
|
|
outb(ICR_ERBRI, iobase+ICR);
|
|
|
|
/* Restore bank register */
|
|
outb(set, iobase+SSR);
|
|
|
|
/* Ready to play! */
|
|
netif_start_queue(dev);
|
|
|
|
/* Give self a hardware name */
|
|
sprintf(hwname, "w83977af @ 0x%03x", self->io.fir_base);
|
|
|
|
/*
|
|
* Open new IrLAP layer instance, now that everything should be
|
|
* initialized properly
|
|
*/
|
|
self->irlap = irlap_open(dev, &self->qos, hwname);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Function w83977af_net_close (dev)
|
|
*
|
|
* Stop the device
|
|
*
|
|
*/
|
|
static int w83977af_net_close(struct net_device *dev)
|
|
{
|
|
struct w83977af_ir *self;
|
|
int iobase;
|
|
__u8 set;
|
|
|
|
IRDA_DEBUG(0, "%s()\n", __func__ );
|
|
|
|
IRDA_ASSERT(dev != NULL, return -1;);
|
|
|
|
self = netdev_priv(dev);
|
|
|
|
IRDA_ASSERT(self != NULL, return 0;);
|
|
|
|
iobase = self->io.fir_base;
|
|
|
|
/* Stop device */
|
|
netif_stop_queue(dev);
|
|
|
|
/* Stop and remove instance of IrLAP */
|
|
if (self->irlap)
|
|
irlap_close(self->irlap);
|
|
self->irlap = NULL;
|
|
|
|
disable_dma(self->io.dma);
|
|
|
|
/* Save current set */
|
|
set = inb(iobase+SSR);
|
|
|
|
/* Disable interrupts */
|
|
switch_bank(iobase, SET0);
|
|
outb(0, iobase+ICR);
|
|
|
|
free_irq(self->io.irq, dev);
|
|
free_dma(self->io.dma);
|
|
|
|
/* Restore bank register */
|
|
outb(set, iobase+SSR);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Function w83977af_net_ioctl (dev, rq, cmd)
|
|
*
|
|
* Process IOCTL commands for this device
|
|
*
|
|
*/
|
|
static int w83977af_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
|
|
{
|
|
struct if_irda_req *irq = (struct if_irda_req *) rq;
|
|
struct w83977af_ir *self;
|
|
unsigned long flags;
|
|
int ret = 0;
|
|
|
|
IRDA_ASSERT(dev != NULL, return -1;);
|
|
|
|
self = netdev_priv(dev);
|
|
|
|
IRDA_ASSERT(self != NULL, return -1;);
|
|
|
|
IRDA_DEBUG(2, "%s(), %s, (cmd=0x%X)\n", __func__ , dev->name, cmd);
|
|
|
|
spin_lock_irqsave(&self->lock, flags);
|
|
|
|
switch (cmd) {
|
|
case SIOCSBANDWIDTH: /* Set bandwidth */
|
|
if (!capable(CAP_NET_ADMIN)) {
|
|
ret = -EPERM;
|
|
goto out;
|
|
}
|
|
w83977af_change_speed(self, irq->ifr_baudrate);
|
|
break;
|
|
case SIOCSMEDIABUSY: /* Set media busy */
|
|
if (!capable(CAP_NET_ADMIN)) {
|
|
ret = -EPERM;
|
|
goto out;
|
|
}
|
|
irda_device_set_media_busy(self->netdev, TRUE);
|
|
break;
|
|
case SIOCGRECEIVING: /* Check if we are receiving right now */
|
|
irq->ifr_receiving = w83977af_is_receiving(self);
|
|
break;
|
|
default:
|
|
ret = -EOPNOTSUPP;
|
|
}
|
|
out:
|
|
spin_unlock_irqrestore(&self->lock, flags);
|
|
return ret;
|
|
}
|
|
|
|
MODULE_AUTHOR("Dag Brattli <dagb@cs.uit.no>");
|
|
MODULE_DESCRIPTION("Winbond W83977AF IrDA Device Driver");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
|
|
module_param(qos_mtt_bits, int, 0);
|
|
MODULE_PARM_DESC(qos_mtt_bits, "Mimimum Turn Time");
|
|
module_param_array(io, int, NULL, 0);
|
|
MODULE_PARM_DESC(io, "Base I/O addresses");
|
|
module_param_array(irq, int, NULL, 0);
|
|
MODULE_PARM_DESC(irq, "IRQ lines");
|
|
|
|
/*
|
|
* Function init_module (void)
|
|
*
|
|
*
|
|
*
|
|
*/
|
|
module_init(w83977af_init);
|
|
|
|
/*
|
|
* Function cleanup_module (void)
|
|
*
|
|
*
|
|
*
|
|
*/
|
|
module_exit(w83977af_cleanup);
|