/********************************************************************* * * Filename: w83977af_ir.c * Version: 1.0 * Description: FIR driver for the Winbond W83977AF Super I/O chip * Status: Experimental. * Author: Paul VanderSpek * Created at: Wed Nov 4 11:46:16 1998 * Modified at: Fri Jan 28 12:10:59 2000 * Modified by: Dag Brattli <dagb@cs.uit.no> * * Copyright (c) 1998-2000 Dag Brattli <dagb@cs.uit.no> * Copyright (c) 1998-1999 Rebel.com * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of * the License, or (at your option) any later version. * * Neither Paul VanderSpek nor Rebel.com admit liability nor provide * warranty for any of this software. This material is provided "AS-IS" * and at no charge. * * If you find bugs in this file, its very likely that the same bug * will also be in pc87108.c since the implementations are quite * similar. * * Notice that all functions that needs to access the chip in _any_ * way, must save BSR register on entry, and restore it on exit. * It is _very_ important to follow this policy! * * __u8 bank; * * bank = inb( iobase+BSR); * * do_your_stuff_here(); * * outb( bank, iobase+BSR); * ********************************************************************/ #include <linux/module.h> #include <linux/kernel.h> #include <linux/types.h> #include <linux/skbuff.h> #include <linux/netdevice.h> #include <linux/ioport.h> #include <linux/delay.h> #include <linux/init.h> #include <linux/interrupt.h> #include <linux/rtnetlink.h> #include <linux/dma-mapping.h> #include <linux/gfp.h> #include <asm/io.h> #include <asm/dma.h> #include <asm/byteorder.h> #include <net/irda/irda.h> #include <net/irda/wrapper.h> #include <net/irda/irda_device.h> #include "w83977af.h" #include "w83977af_ir.h" #ifdef CONFIG_ARCH_NETWINDER /* Adjust to NetWinder differences */ #undef CONFIG_NETWINDER_TX_DMA_PROBLEMS /* Not needed */ #define CONFIG_NETWINDER_RX_DMA_PROBLEMS /* Must have this one! */ #endif #define CONFIG_USE_W977_PNP /* Currently needed */ #define PIO_MAX_SPEED 115200 static char *driver_name = "w83977af_ir"; static int qos_mtt_bits = 0x07; /* 1 ms or more */ #define CHIP_IO_EXTENT 8 static unsigned int io[] = { 0x180, ~0, ~0, ~0 }; #ifdef CONFIG_ARCH_NETWINDER /* Adjust to NetWinder differences */ static unsigned int irq[] = { 6, 0, 0, 0 }; #else static unsigned int irq[] = { 11, 0, 0, 0 }; #endif static unsigned int dma[] = { 1, 0, 0, 0 }; static unsigned int efbase[] = { W977_EFIO_BASE, W977_EFIO2_BASE }; static unsigned int efio = W977_EFIO_BASE; static struct w83977af_ir *dev_self[] = { NULL, NULL, NULL, NULL}; /* Some prototypes */ static int w83977af_open(int i, unsigned int iobase, unsigned int irq, unsigned int dma); static int w83977af_close(struct w83977af_ir *self); static int w83977af_probe(int iobase, int irq, int dma); static int w83977af_dma_receive(struct w83977af_ir *self); static int w83977af_dma_receive_complete(struct w83977af_ir *self); static netdev_tx_t w83977af_hard_xmit(struct sk_buff *skb, struct net_device *dev); static int w83977af_pio_write(int iobase, __u8 *buf, int len, int fifo_size); static void w83977af_dma_write(struct w83977af_ir *self, int iobase); static void w83977af_change_speed(struct w83977af_ir *self, __u32 speed); static int w83977af_is_receiving(struct w83977af_ir *self); static int w83977af_net_open(struct net_device *dev); static int w83977af_net_close(struct net_device *dev); static int w83977af_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); /* * Function w83977af_init () * * Initialize chip. Just try to find out how many chips we are dealing with * and where they are */ static int __init w83977af_init(void) { int i; IRDA_DEBUG(0, "%s()\n", __func__ ); for (i=0; i < ARRAY_SIZE(dev_self) && io[i] < 2000; i++) { if (w83977af_open(i, io[i], irq[i], dma[i]) == 0) return 0; } return -ENODEV; } /* * Function w83977af_cleanup () * * Close all configured chips * */ static void __exit w83977af_cleanup(void) { int i; IRDA_DEBUG(4, "%s()\n", __func__ ); for (i=0; i < ARRAY_SIZE(dev_self); i++) { if (dev_self[i]) w83977af_close(dev_self[i]); } } static const struct net_device_ops w83977_netdev_ops = { .ndo_open = w83977af_net_open, .ndo_stop = w83977af_net_close, .ndo_start_xmit = w83977af_hard_xmit, .ndo_do_ioctl = w83977af_net_ioctl, }; /* * Function w83977af_open (iobase, irq) * * Open driver instance * */ static int w83977af_open(int i, unsigned int iobase, unsigned int irq, unsigned int dma) { struct net_device *dev; struct w83977af_ir *self; int err; IRDA_DEBUG(0, "%s()\n", __func__ ); /* Lock the port that we need */ if (!request_region(iobase, CHIP_IO_EXTENT, driver_name)) { IRDA_DEBUG(0, "%s(), can't get iobase of 0x%03x\n", __func__ , iobase); return -ENODEV; } if (w83977af_probe(iobase, irq, dma) == -1) { err = -1; goto err_out; } /* * Allocate new instance of the driver */ dev = alloc_irdadev(sizeof(struct w83977af_ir)); if (dev == NULL) { printk( KERN_ERR "IrDA: Can't allocate memory for " "IrDA control block!\n"); err = -ENOMEM; goto err_out; } self = netdev_priv(dev); spin_lock_init(&self->lock); /* Initialize IO */ self->io.fir_base = iobase; self->io.irq = irq; self->io.fir_ext = CHIP_IO_EXTENT; self->io.dma = dma; self->io.fifo_size = 32; /* Initialize QoS for this device */ irda_init_max_qos_capabilies(&self->qos); /* The only value we must override it the baudrate */ /* FIXME: The HP HDLS-1100 does not support 1152000! */ self->qos.baud_rate.bits = IR_9600|IR_19200|IR_38400|IR_57600| IR_115200|IR_576000|IR_1152000|(IR_4000000 << 8); /* The HP HDLS-1100 needs 1 ms according to the specs */ self->qos.min_turn_time.bits = qos_mtt_bits; irda_qos_bits_to_value(&self->qos); /* Max DMA buffer size needed = (data_size + 6) * (window_size) + 6; */ self->rx_buff.truesize = 14384; self->tx_buff.truesize = 4000; /* Allocate memory if needed */ self->rx_buff.head = dma_zalloc_coherent(NULL, self->rx_buff.truesize, &self->rx_buff_dma, GFP_KERNEL); if (self->rx_buff.head == NULL) { err = -ENOMEM; goto err_out1; } self->tx_buff.head = dma_zalloc_coherent(NULL, self->tx_buff.truesize, &self->tx_buff_dma, GFP_KERNEL); if (self->tx_buff.head == NULL) { err = -ENOMEM; goto err_out2; } self->rx_buff.in_frame = FALSE; self->rx_buff.state = OUTSIDE_FRAME; self->tx_buff.data = self->tx_buff.head; self->rx_buff.data = self->rx_buff.head; self->netdev = dev; dev->netdev_ops = &w83977_netdev_ops; err = register_netdev(dev); if (err) { IRDA_ERROR("%s(), register_netdevice() failed!\n", __func__); goto err_out3; } IRDA_MESSAGE("IrDA: Registered device %s\n", dev->name); /* Need to store self somewhere */ dev_self[i] = self; return 0; err_out3: dma_free_coherent(NULL, self->tx_buff.truesize, self->tx_buff.head, self->tx_buff_dma); err_out2: dma_free_coherent(NULL, self->rx_buff.truesize, self->rx_buff.head, self->rx_buff_dma); err_out1: free_netdev(dev); err_out: release_region(iobase, CHIP_IO_EXTENT); return err; } /* * Function w83977af_close (self) * * Close driver instance * */ static int w83977af_close(struct w83977af_ir *self) { int iobase; IRDA_DEBUG(0, "%s()\n", __func__ ); iobase = self->io.fir_base; #ifdef CONFIG_USE_W977_PNP /* enter PnP configuration mode */ w977_efm_enter(efio); w977_select_device(W977_DEVICE_IR, efio); /* Deactivate device */ w977_write_reg(0x30, 0x00, efio); w977_efm_exit(efio); #endif /* CONFIG_USE_W977_PNP */ /* Remove netdevice */ unregister_netdev(self->netdev); /* Release the PORT that this driver is using */ IRDA_DEBUG(0 , "%s(), Releasing Region %03x\n", __func__ , self->io.fir_base); release_region(self->io.fir_base, self->io.fir_ext); if (self->tx_buff.head) dma_free_coherent(NULL, self->tx_buff.truesize, self->tx_buff.head, self->tx_buff_dma); if (self->rx_buff.head) dma_free_coherent(NULL, self->rx_buff.truesize, self->rx_buff.head, self->rx_buff_dma); free_netdev(self->netdev); return 0; } static int w83977af_probe(int iobase, int irq, int dma) { int version; int i; for (i=0; i < 2; i++) { IRDA_DEBUG( 0, "%s()\n", __func__ ); #ifdef CONFIG_USE_W977_PNP /* Enter PnP configuration mode */ w977_efm_enter(efbase[i]); w977_select_device(W977_DEVICE_IR, efbase[i]); /* Configure PnP port, IRQ, and DMA channel */ w977_write_reg(0x60, (iobase >> 8) & 0xff, efbase[i]); w977_write_reg(0x61, (iobase) & 0xff, efbase[i]); w977_write_reg(0x70, irq, efbase[i]); #ifdef CONFIG_ARCH_NETWINDER /* Netwinder uses 1 higher than Linux */ w977_write_reg(0x74, dma+1, efbase[i]); #else w977_write_reg(0x74, dma, efbase[i]); #endif /*CONFIG_ARCH_NETWINDER */ w977_write_reg(0x75, 0x04, efbase[i]); /* Disable Tx DMA */ /* Set append hardware CRC, enable IR bank selection */ w977_write_reg(0xf0, APEDCRC|ENBNKSEL, efbase[i]); /* Activate device */ w977_write_reg(0x30, 0x01, efbase[i]); w977_efm_exit(efbase[i]); #endif /* CONFIG_USE_W977_PNP */ /* Disable Advanced mode */ switch_bank(iobase, SET2); outb(iobase+2, 0x00); /* Turn on UART (global) interrupts */ switch_bank(iobase, SET0); outb(HCR_EN_IRQ, iobase+HCR); /* Switch to advanced mode */ switch_bank(iobase, SET2); outb(inb(iobase+ADCR1) | ADCR1_ADV_SL, iobase+ADCR1); /* Set default IR-mode */ switch_bank(iobase, SET0); outb(HCR_SIR, iobase+HCR); /* Read the Advanced IR ID */ switch_bank(iobase, SET3); version = inb(iobase+AUID); /* Should be 0x1? */ if (0x10 == (version & 0xf0)) { efio = efbase[i]; /* Set FIFO size to 32 */ switch_bank(iobase, SET2); outb(ADCR2_RXFS32|ADCR2_TXFS32, iobase+ADCR2); /* Set FIFO threshold to TX17, RX16 */ switch_bank(iobase, SET0); outb(UFR_RXTL|UFR_TXTL|UFR_TXF_RST|UFR_RXF_RST| UFR_EN_FIFO,iobase+UFR); /* Receiver frame length */ switch_bank(iobase, SET4); outb(2048 & 0xff, iobase+6); outb((2048 >> 8) & 0x1f, iobase+7); /* * Init HP HSDL-1100 transceiver. * * Set IRX_MSL since we have 2 * receive paths IRRX, * and IRRXH. Clear IRSL0D since we want IRSL0 * to * be a input pin used for IRRXH * * IRRX pin 37 connected to receiver * IRTX pin 38 connected to transmitter * FIRRX pin 39 connected to receiver (IRSL0) * CIRRX pin 40 connected to pin 37 */ switch_bank(iobase, SET7); outb(0x40, iobase+7); IRDA_MESSAGE("W83977AF (IR) driver loaded. " "Version: 0x%02x\n", version); return 0; } else { /* Try next extented function register address */ IRDA_DEBUG( 0, "%s(), Wrong chip version", __func__ ); } } return -1; } static void w83977af_change_speed(struct w83977af_ir *self, __u32 speed) { int ir_mode = HCR_SIR; int iobase; __u8 set; iobase = self->io.fir_base; /* Update accounting for new speed */ self->io.speed = speed; /* Save current bank */ set = inb(iobase+SSR); /* Disable interrupts */ switch_bank(iobase, SET0); outb(0, iobase+ICR); /* Select Set 2 */ switch_bank(iobase, SET2); outb(0x00, iobase+ABHL); switch (speed) { case 9600: outb(0x0c, iobase+ABLL); break; case 19200: outb(0x06, iobase+ABLL); break; case 38400: outb(0x03, iobase+ABLL); break; case 57600: outb(0x02, iobase+ABLL); break; case 115200: outb(0x01, iobase+ABLL); break; case 576000: ir_mode = HCR_MIR_576; IRDA_DEBUG(0, "%s(), handling baud of 576000\n", __func__ ); break; case 1152000: ir_mode = HCR_MIR_1152; IRDA_DEBUG(0, "%s(), handling baud of 1152000\n", __func__ ); break; case 4000000: ir_mode = HCR_FIR; IRDA_DEBUG(0, "%s(), handling baud of 4000000\n", __func__ ); break; default: ir_mode = HCR_FIR; IRDA_DEBUG(0, "%s(), unknown baud rate of %d\n", __func__ , speed); break; } /* Set speed mode */ switch_bank(iobase, SET0); outb(ir_mode, iobase+HCR); /* set FIFO size to 32 */ switch_bank(iobase, SET2); outb(ADCR2_RXFS32|ADCR2_TXFS32, iobase+ADCR2); /* set FIFO threshold to TX17, RX16 */ switch_bank(iobase, SET0); outb(0x00, iobase+UFR); /* Reset */ outb(UFR_EN_FIFO, iobase+UFR); /* First we must enable FIFO */ outb(0xa7, iobase+UFR); 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 netdev_tx_t 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_kfree_skb(skb); return NETDEV_TX_OK; } 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); 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); } 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_kfree_skb(skb); /* Restore set register */ outb(set, iobase+SSR); return NETDEV_TX_OK; } /* * 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 underrun! */ 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) { udelay(80); /* Should be enough!? */ } 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, dev); 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);