/********************************************************************* * * Filename: smc-ircc.c * Version: 0.1 * Description: Driver for the SMC Infrared Communications Controller (SMC) * Status: Experimental. * Author: Thomas Davis (tadavis@jps.net) * Created at: * Modified at: Wed May 19 15:30:08 1999 * Modified by: Dag Brattli * * Copyright (c) 1998-1999 Thomas Davis, All Rights Reserved. * * 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. * * I, Thomas Davis, admit no liability nor provide warranty for any * of this software. This material is provided "AS-IS" and at no charge. * * Applicable Models : Fujitsu Lifebook 635t * Sony PCG-505TX (gets DMA wrong.) * ********************************************************************/ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include static char *driver_name = "smc-ircc"; #define CHIP_IO_EXTENT 8 static unsigned int io[] = { 0x2e8, 0x140, ~0, ~0 }; static unsigned int io2[] = { 0x2f8, 0x3e8, 0, 0}; static struct ircc_cb *dev_self[] = { NULL, NULL, NULL, NULL}; /* Some prototypes */ static int ircc_open( int i, unsigned int iobase, unsigned int board_addr); static int ircc_close( struct irda_device *idev); static int ircc_probe( int iobase, int board_addr); static int ircc_dma_receive( struct irda_device *idev); static int ircc_dma_receive_complete(struct irda_device *idev, int iobase); static int ircc_hard_xmit( struct sk_buff *skb, struct device *dev); static void ircc_dma_write( struct irda_device *idev, int iobase); static void ircc_change_speed( struct irda_device *idev, int baud); static void ircc_interrupt(int irq, void *dev_id, struct pt_regs *regs); static void ircc_wait_until_sent( struct irda_device *idev); static int ircc_is_receiving( struct irda_device *idev); static int ircc_net_init( struct device *dev); static int ircc_net_open( struct device *dev); static int ircc_net_close( struct device *dev); static int ircc_debug=3; static int ircc_irq=255; static int ircc_dma=255; static inline void register_bank(int port, int bank) { outb(((inb(port+UART_MASTER) & 0xF0) | (bank & 0x07)), port+UART_MASTER); } static inline unsigned int serial_in(int port, int offset) { return inb(port+offset); } static inline void serial_out(int port, int offset, int value) { outb(value, port+offset); } /* * Function ircc_init () * * Initialize chip. Just try to find out how many chips we are dealing with * and where they are */ __initfunc(int ircc_init(void)) { int i; DEBUG(ircc_debug, __FUNCTION__ " -->\n"); for ( i=0; (io[i] < 2000) && (i < 4); i++) { int ioaddr = io[i]; if (check_region(ioaddr, CHIP_IO_EXTENT)) continue; if (ircc_open( i, io[i], io2[i]) == 0) return 0; } DEBUG( ircc_debug, "--> " __FUNCTION__ "\n"); return -ENODEV; } /* * Function ircc_cleanup () * * Close all configured chips * */ #ifdef MODULE static void ircc_cleanup(void) { int i; DEBUG(ircc_debug, __FUNCTION__ " -->\n"); for ( i=0; i < 4; i++) { if ( dev_self[i]) ircc_close( &(dev_self[i]->idev)); } DEBUG( ircc_debug, "--> " __FUNCTION__ "\n"); } #endif /* MODULE */ /* * Function ircc_open (iobase, irq) * * Open driver instance * */ static int ircc_open( int i, unsigned int iobase, unsigned int iobase2) { struct ircc_cb *self; struct irda_device *idev; int ret; int config; DEBUG( ircc_debug, __FUNCTION__ " -->\n"); if ((config = ircc_probe( iobase, iobase2)) == -1) { DEBUG(ircc_debug, __FUNCTION__ ": addr 0x%04x - no device found!\n", iobase); return -1; } /* * Allocate new instance of the driver */ self = kmalloc( sizeof(struct ircc_cb), GFP_KERNEL); if ( self == NULL) { printk( KERN_ERR "IrDA: Can't allocate memory for " "IrDA control block!\n"); return -ENOMEM; } memset(self, 0, sizeof(struct ircc_cb)); /* Need to store self somewhere */ dev_self[i] = self; idev = &self->idev; /* Initialize IO */ idev->io.iobase = iobase; idev->io.iobase2 = iobase2; /* Used by irport */ idev->io.irq = config >> 4 & 0x0f; if (ircc_irq < 255) { printk(KERN_INFO "smc: Overriding IRQ - chip says %d, using %d\n", idev->io.irq, ircc_irq); idev->io.irq = ircc_irq; } idev->io.io_ext = CHIP_IO_EXTENT; idev->io.io_ext2 = 8; /* Used by irport */ idev->io.dma = config & 0x0f; if (ircc_dma < 255) { printk(KERN_INFO "smc: Overriding DMA - chip says %d, using %d\n", idev->io.dma, ircc_dma); idev->io.dma = ircc_dma; } idev->io.fifo_size = 16; /* Lock the port that we need */ ret = check_region( idev->io.iobase, idev->io.io_ext); if ( ret < 0) { DEBUG( 0, __FUNCTION__ ": can't get iobase of 0x%03x\n", idev->io.iobase); /* ircc_cleanup( self->idev); */ return -ENODEV; } ret = check_region( idev->io.iobase2, idev->io.io_ext2); if ( ret < 0) { DEBUG( 0, __FUNCTION__ ": can't get iobase of 0x%03x\n", idev->io.iobase2); /* ircc_cleanup( self->idev); */ return -ENODEV; } request_region( idev->io.iobase, idev->io.io_ext, idev->name); request_region( idev->io.iobase2, idev->io.io_ext2, idev->name); /* Initialize QoS for this device */ irda_init_max_qos_capabilies( &idev->qos); #if 1 /* The only value we must override it the baudrate */ idev->qos.baud_rate.bits = IR_9600|IR_19200|IR_38400|IR_57600| IR_115200|IR_576000|IR_1152000|(IR_4000000 << 8); #else /* The only value we must override it the baudrate */ idev->qos.baud_rate.bits = IR_9600|IR_19200|IR_38400|IR_57600| IR_115200; #endif idev->qos.min_turn_time.bits = 0x07; irda_qos_bits_to_value( &idev->qos); idev->flags = IFF_FIR|IFF_SIR|IFF_DMA|IFF_PIO; /* Specify which buffer allocation policy we need */ idev->rx_buff.flags = GFP_KERNEL | GFP_DMA; idev->tx_buff.flags = GFP_KERNEL | GFP_DMA; /* Max DMA buffer size needed = (data_size + 6) * (window_size) + 6; */ idev->rx_buff.truesize = 4000; idev->tx_buff.truesize = 4000; /* Initialize callbacks */ idev->change_speed = ircc_change_speed; idev->wait_until_sent = ircc_wait_until_sent; idev->is_receiving = ircc_is_receiving; /* Override the network functions we need to use */ idev->netdev.init = ircc_net_init; idev->netdev.hard_start_xmit = ircc_hard_xmit; idev->netdev.open = ircc_net_open; idev->netdev.stop = ircc_net_close; irport_start(idev, iobase2); /* Open the IrDA device */ irda_device_open( idev, driver_name, self); DEBUG( ircc_debug, "--> " __FUNCTION__ "\n"); return 0; } /* * Function ircc_close (idev) * * Close driver instance * */ static int ircc_close( struct irda_device *idev) { int iobase; DEBUG(ircc_debug, __FUNCTION__ " -->\n"); ASSERT( idev != NULL, return -1;); ASSERT( idev->magic == IRDA_DEVICE_MAGIC, return -1;); iobase = idev->io.iobase; irport_stop(idev, idev->io.iobase2); register_bank(iobase, 0); serial_out(iobase, UART_IER, 0); serial_out(iobase, UART_MASTER, UART_MASTER_RESET); register_bank(iobase, 1); serial_out(iobase, UART_SCE_CFGA, UART_CFGA_IRDA_SIR_A | UART_CFGA_TX_POLARITY); serial_out(iobase, UART_SCE_CFGB, UART_CFGB_IR); /* Release the PORT that this driver is using */ DEBUG( ircc_debug, __FUNCTION__ ": releasing 0x%03x\n", idev->io.iobase); release_region( idev->io.iobase, idev->io.io_ext); if ( idev->io.iobase2) { DEBUG( ircc_debug, __FUNCTION__ ": releasing 0x%03x\n", idev->io.iobase2); release_region( idev->io.iobase2, idev->io.io_ext2); } irda_device_close( idev); DEBUG( ircc_debug, "--> " __FUNCTION__ "\n"); return 0; } /* * Function ircc_probe (iobase, board_addr, irq, dma) * * Returns non-negative on success. * */ static int ircc_probe( int iobase, int iobase2) { int version = 1; int low, high, chip, config, dma, irq; DEBUG(ircc_debug, __FUNCTION__ " -->\n"); register_bank(iobase, 3); high = serial_in(iobase, UART_ID_HIGH); low = serial_in(iobase, UART_ID_LOW); chip = serial_in(iobase, UART_CHIP_ID); version = serial_in(iobase, UART_VERSION); config = serial_in(iobase, UART_INTERFACE); irq = config >> 4 & 0x0f; dma = config & 0x0f; if (high == 0x10 && low == 0xb8 && chip == 0xf1) { DEBUG(0, "SMC IrDA Controller found; version = %d, " "port 0x%04x, dma %d, interrupt %d\n", version, iobase, dma, irq); } else { return -1; } serial_out(iobase, UART_MASTER, 0); DEBUG( ircc_debug, "--> " __FUNCTION__ "\n"); return config; } /* * Function ircc_change_speed (idev, baud) * * Change the speed of the device * */ static void ircc_change_speed( struct irda_device *idev, int speed) { struct ircc_cb *self; int iobase, ir_mode, select, fast; DEBUG(ircc_debug+1, __FUNCTION__ " -->\n"); ASSERT(idev != NULL, return;); ASSERT(idev->magic == IRDA_DEVICE_MAGIC, return;); self = idev->priv; iobase = idev->io.iobase; /* Update accounting for new speed */ idev->io.baudrate = speed; switch ( speed) { case 9600: case 19200: case 37600: case 57600: case 115200: DEBUG(ircc_debug+1, __FUNCTION__ ": using irport to change speed to %d\n", speed); register_bank(iobase, 0); serial_out(iobase, UART_IER, 0); serial_out(iobase, UART_MASTER, UART_MASTER_RESET); serial_out(iobase, UART_MASTER, UART_MASTER_INT_EN); irport_start(idev, idev->io.iobase2); irport_change_speed( idev, speed); return; break; case 576000: ir_mode = UART_CFGA_IRDA_HDLC; select = 0; fast = 0; DEBUG( ircc_debug, __FUNCTION__ ": handling baud of 576000\n"); break; case 1152000: ir_mode = UART_CFGA_IRDA_HDLC; select = UART_1152; fast = 0; DEBUG(ircc_debug, __FUNCTION__ ": handling baud of 1152000\n"); break; case 4000000: ir_mode = UART_CFGA_IRDA_4PPM; select = 0; fast = UART_LCR_A_FAST; DEBUG(ircc_debug, __FUNCTION__ ": handling baud of 4000000\n"); break; default: DEBUG( 0, __FUNCTION__ ": unknown baud rate of %d\n", speed); return; } #if 0 serial_out(idev->io.iobase2, 4, 0x08); #endif serial_out(iobase, UART_MASTER, UART_MASTER_RESET); register_bank(iobase, 0); serial_out(iobase, UART_IER, 0); irport_stop(idev, idev->io.iobase2); idev->netdev.tbusy = 0; register_bank(iobase, 1); serial_out(iobase, UART_SCE_CFGA, ((serial_in(iobase, UART_SCE_CFGA) & 0x87) | ir_mode)); serial_out(iobase, UART_SCE_CFGB, ((serial_in(iobase, UART_SCE_CFGB) & 0x3f) | UART_CFGB_IR)); (void) serial_in(iobase, UART_FIFO_THRESHOLD); serial_out(iobase, UART_FIFO_THRESHOLD, 64); register_bank(iobase, 4); serial_out(iobase, UART_CONTROL, (serial_in(iobase, UART_CONTROL) & 0x30) | select | UART_CRC ); register_bank(iobase, 0); serial_out(iobase, UART_LCR_A, fast); DEBUG( ircc_debug, "--> " __FUNCTION__ "\n"); } /* * Function ircc_hard_xmit (skb, dev) * * Transmit the frame! * */ static int ircc_hard_xmit( struct sk_buff *skb, struct device *dev) { struct irda_device *idev; int iobase; int mtt; DEBUG(ircc_debug+1, __FUNCTION__ " -->\n"); idev = (struct irda_device *) dev->priv; ASSERT( idev != NULL, return 0;); ASSERT( idev->magic == IRDA_DEVICE_MAGIC, return 0;); iobase = idev->io.iobase; DEBUG(ircc_debug+1, __FUNCTION__ "(%ld), skb->len=%d\n", jiffies, (int) skb->len); /* Use irport for SIR speeds */ if (idev->io.baudrate <= 115200) { DEBUG(ircc_debug+1, __FUNCTION__ ": calling irport_hard_xmit\n"); return irport_hard_xmit(skb, dev); } DEBUG(ircc_debug, __FUNCTION__ ": using dma; len=%d\n", skb->len); /* Lock transmit buffer */ if (irda_lock((void *) &dev->tbusy) == FALSE) return -EBUSY; memcpy( idev->tx_buff.head, skb->data, skb->len); /* Make sure that the length is a multiple of 16 bits */ if ( skb->len & 0x01) skb->len++; idev->tx_buff.len = skb->len; idev->tx_buff.data = idev->tx_buff.head; #if 0 idev->tx_buff.offset = 0; #endif mtt = irda_get_mtt( skb); /* Use udelay for delays less than 50 us. */ if (mtt) udelay( mtt); ircc_dma_write( idev, iobase); dev_kfree_skb( skb); DEBUG( ircc_debug, "--> " __FUNCTION__ "\n"); return 0; } /* * Function ircc_dma_xmit (idev, iobase) * * Transmit data using DMA * */ static void ircc_dma_write( struct irda_device *idev, int iobase) { struct ircc_cb *self; DEBUG(ircc_debug, __FUNCTION__ " -->\n"); ASSERT( idev != NULL, return;); ASSERT( idev->magic == IRDA_DEVICE_MAGIC, return;); self = idev->priv; iobase = idev->io.iobase; setup_dma( idev->io.dma, idev->tx_buff.data, idev->tx_buff.len, DMA_MODE_WRITE); idev->io.direction = IO_XMIT; serial_out(idev->io.iobase2, 4, 0x08); register_bank(iobase, 4); serial_out(iobase, UART_CONTROL, (serial_in(iobase, UART_CONTROL) & 0xF0)); serial_out(iobase, UART_BOF_COUNT_LO, 2); serial_out(iobase, UART_BRICKWALL_CNT_LO, 0); #if 1 serial_out(iobase, UART_BRICKWALL_TX_CNT_HI, idev->tx_buff.len >> 8); serial_out(iobase, UART_TX_SIZE_LO, idev->tx_buff.len & 0xff); #else serial_out(iobase, UART_BRICKWALL_TX_CNT_HI, 0); serial_out(iobase, UART_TX_SIZE_LO, 0); #endif register_bank(iobase, 1); serial_out(iobase, UART_SCE_CFGB, serial_in(iobase, UART_SCE_CFGB) | UART_CFGB_DMA_ENABLE); register_bank(iobase, 0); serial_out(iobase, UART_IER, UART_IER_ACTIVE_FRAME | UART_IER_EOM); serial_out(iobase, UART_LCR_B, UART_LCR_B_SCE_TRANSMIT|UART_LCR_B_SIP_ENABLE); serial_out(iobase, UART_MASTER, UART_MASTER_INT_EN); DEBUG( ircc_debug, "--> " __FUNCTION__ "\n"); } /* * Function ircc_dma_xmit_complete (idev) * * The transfer of a frame in finished. This function will only be called * by the interrupt handler * */ static void ircc_dma_xmit_complete( struct irda_device *idev, int underrun) { struct ircc_cb *self; int iobase, d; DEBUG(ircc_debug, __FUNCTION__ " -->\n"); ASSERT( idev != NULL, return;); ASSERT( idev->magic == IRDA_DEVICE_MAGIC, return;); register_bank(idev->io.iobase, 1); serial_out(idev->io.iobase, UART_SCE_CFGB, serial_in(idev->io.iobase, UART_SCE_CFGB) & ~UART_CFGB_DMA_ENABLE); d = get_dma_residue(idev->io.dma); DEBUG(ircc_debug, __FUNCTION__ ": dma residue = %d, len=%d, sent=%d\n", d, idev->tx_buff.len, idev->tx_buff.len - d); self = idev->priv; iobase = idev->io.iobase; /* Check for underrrun! */ if ( underrun) { idev->stats.tx_errors++; idev->stats.tx_fifo_errors++; } else { idev->stats.tx_packets++; idev->stats.tx_bytes += idev->tx_buff.len; } /* Unlock tx_buff and request another frame */ idev->netdev.tbusy = 0; /* Unlock */ idev->media_busy = FALSE; /* Tell the network layer, that we can accept more frames */ mark_bh( NET_BH); DEBUG( ircc_debug, "--> " __FUNCTION__ "\n"); } /* * Function ircc_dma_receive (idev) * * Get ready for receiving a frame. The device will initiate a DMA * if it starts to receive a frame. * */ static int ircc_dma_receive( struct irda_device *idev) { struct ircc_cb *self; int iobase; DEBUG(ircc_debug, __FUNCTION__ " -->\n"); ASSERT( idev != NULL, return -1;); ASSERT( idev->magic == IRDA_DEVICE_MAGIC, return -1;); self = idev->priv; iobase= idev->io.iobase; setup_dma( idev->io.dma, idev->rx_buff.data, idev->rx_buff.truesize, DMA_MODE_READ); /* driver->media_busy = FALSE; */ idev->io.direction = IO_RECV; idev->rx_buff.data = idev->rx_buff.head; #if 0 idev->rx_buff.offset = 0; #endif register_bank(iobase, 4); serial_out(iobase, UART_CONTROL, (serial_in(iobase, UART_CONTROL) &0xF0)); serial_out(iobase, UART_BOF_COUNT_LO, 2); serial_out(iobase, UART_BRICKWALL_CNT_LO, 0); serial_out(iobase, UART_BRICKWALL_TX_CNT_HI, 0); serial_out(iobase, UART_TX_SIZE_LO, 0); serial_out(iobase, UART_RX_SIZE_HI, 0); serial_out(iobase, UART_RX_SIZE_LO, 0); register_bank(iobase, 0); serial_out(iobase, UART_LCR_B, UART_LCR_B_SCE_RECEIVE | UART_LCR_B_SIP_ENABLE); register_bank(iobase, 1); serial_out(iobase, UART_SCE_CFGB, serial_in(iobase, UART_SCE_CFGB) | UART_CFGB_DMA_ENABLE | UART_CFGB_DMA_BURST); DEBUG( ircc_debug, "--> " __FUNCTION__ "\n"); return 0; } /* * Function ircc_dma_receive_complete (idev) * * Finished with receiving frames * * */ static int ircc_dma_receive_complete( struct irda_device *idev, int iobase) { struct sk_buff *skb; struct ircc_cb *self; int len, msgcnt; DEBUG(ircc_debug, __FUNCTION__ " -->\n"); self = idev->priv; msgcnt = serial_in(idev->io.iobase, UART_LCR_B) & 0x08; DEBUG(ircc_debug, __FUNCTION__ ": dma count = %d\n", get_dma_residue(idev->io.dma)); len = idev->rx_buff.truesize - get_dma_residue(idev->io.dma) - 4; DEBUG(ircc_debug, __FUNCTION__ ": msgcnt = %d, len=%d\n", msgcnt, len); skb = dev_alloc_skb( len+1); if (skb == NULL) { printk( KERN_INFO __FUNCTION__ ": memory squeeze, dropping frame.\n"); return FALSE; } /* Make sure IP header gets aligned */ skb_reserve( skb, 1); skb_put( skb, len); memcpy(skb->data, idev->rx_buff.data, len); idev->stats.rx_packets++; skb->dev = &idev->netdev; skb->mac.raw = skb->data; skb->protocol = htons(ETH_P_IRDA); netif_rx( skb); register_bank(idev->io.iobase, 1); serial_out(idev->io.iobase, UART_SCE_CFGB, serial_in(idev->io.iobase, UART_SCE_CFGB) & ~UART_CFGB_DMA_ENABLE); DEBUG( ircc_debug, "--> " __FUNCTION__ "\n"); return TRUE; } /* * Function ircc_interrupt (irq, dev_id, regs) * * An interrupt from the chip has arrived. Time to do some work * */ static void ircc_interrupt(int irq, void *dev_id, struct pt_regs *regs) { int iobase, iir; struct irda_device *idev = (struct irda_device *) dev_id; DEBUG(ircc_debug+1, __FUNCTION__ " -->\n"); if (idev == NULL) { printk( KERN_WARNING "%s: irq %d for unknown device.\n", driver_name, irq); return; } if (idev->io.baudrate <= 115200) { DEBUG(ircc_debug+1, __FUNCTION__ ": routing interrupt to irport_interrupt\n"); return irport_interrupt( irq, dev_id, regs); } iobase = idev->io.iobase; idev->netdev.interrupt = 1; serial_out(iobase, UART_MASTER, 0); register_bank(iobase, 0); iir = serial_in(iobase, UART_IIR); serial_out(iobase, UART_IER, 0); DEBUG(ircc_debug, __FUNCTION__ ": iir = 0x%02x\n", iir); if (iir & UART_IIR_EOM) { DEBUG(ircc_debug, __FUNCTION__ ": UART_IIR_EOM\n"); if (idev->io.direction == IO_RECV) { ircc_dma_receive_complete(idev, iobase); } else { ircc_dma_xmit_complete(idev, iobase); } ircc_dma_receive(idev); } if (iir & UART_IIR_ACTIVE_FRAME) { DEBUG(ircc_debug, __FUNCTION__ ": UART_IIR_ACTIVE_FRAME\n"); idev->rx_buff.state = INSIDE_FRAME; #if 0 ircc_dma_receive(idev); #endif } if (iir & UART_IIR_RAW_MODE) { DEBUG(ircc_debug, __FUNCTION__ ": IIR RAW mode interrupt.\n"); } idev->netdev.interrupt = 0; register_bank(iobase, 0); serial_out(iobase, UART_IER, UART_IER_ACTIVE_FRAME|UART_IER_EOM); serial_out(iobase, UART_MASTER, UART_MASTER_INT_EN); DEBUG( ircc_debug, "--> " __FUNCTION__ "\n"); } /* * Function ircc_wait_until_sent (idev) * * This function should put the current thread to sleep until all data * have been sent, so it is safe to change the speed. */ static void ircc_wait_until_sent( struct irda_device *idev) { DEBUG(ircc_debug, __FUNCTION__ " -->\n"); /* Just delay 60 ms */ current->state = TASK_INTERRUPTIBLE; schedule_timeout(6); DEBUG( ircc_debug, "--> " __FUNCTION__ "\n"); } /* * Function ircc_is_receiving (idev) * * Return TRUE is we are currently receiving a frame * */ static int ircc_is_receiving( struct irda_device *idev) { int status = FALSE; /* int iobase; */ DEBUG(ircc_debug, __FUNCTION__ " -->\n"); ASSERT( idev != NULL, return FALSE;); ASSERT( idev->magic == IRDA_DEVICE_MAGIC, return FALSE;); DEBUG(ircc_debug, __FUNCTION__ ": dma count = %d\n", get_dma_residue(idev->io.dma)); status = ( idev->rx_buff.state != OUTSIDE_FRAME); DEBUG( ircc_debug, "--> " __FUNCTION__ "\n"); return status; } /* * Function ircc_net_init (dev) * * Initialize network device * */ static int ircc_net_init( struct device *dev) { DEBUG(ircc_debug, __FUNCTION__ " -->\n"); /* Setup to be a normal IrDA network device driver */ irda_device_setup( dev); /* Insert overrides below this line! */ DEBUG( ircc_debug, "--> " __FUNCTION__ "\n"); return 0; } /* * Function ircc_net_open (dev) * * Start the device * */ static int ircc_net_open( struct device *dev) { struct irda_device *idev; int iobase; DEBUG(ircc_debug, __FUNCTION__ " -->\n"); ASSERT( dev != NULL, return -1;); idev = (struct irda_device *) dev->priv; ASSERT( idev != NULL, return 0;); ASSERT( idev->magic == IRDA_DEVICE_MAGIC, return 0;); iobase = idev->io.iobase; if (request_irq( idev->io.irq, ircc_interrupt, 0, idev->name, (void *) idev)) { return -EAGAIN; } /* * Always allocate the DMA channel after the IRQ, * and clean up on failure. */ if (request_dma(idev->io.dma, idev->name)) { free_irq( idev->io.irq, idev); return -EAGAIN; } /* Ready to play! */ dev->tbusy = 0; dev->interrupt = 0; dev->start = 1; /* turn on interrupts */ MOD_INC_USE_COUNT; DEBUG( ircc_debug, "--> " __FUNCTION__ "\n"); return 0; } /* * Function ircc_net_close (dev) * * Stop the device * */ static int ircc_net_close(struct device *dev) { struct irda_device *idev; int iobase; DEBUG(ircc_debug, __FUNCTION__ " -->\n"); /* Stop device */ dev->tbusy = 1; dev->start = 0; ASSERT( dev != NULL, return -1;); idev = (struct irda_device *) dev->priv; ASSERT( idev != NULL, return 0;); ASSERT( idev->magic == IRDA_DEVICE_MAGIC, return 0;); iobase = idev->io.iobase; disable_dma( idev->io.dma); /* Disable interrupts */ free_irq( idev->io.irq, idev); free_dma( idev->io.dma); MOD_DEC_USE_COUNT; DEBUG( ircc_debug, "--> " __FUNCTION__ "\n"); return 0; } #ifdef MODULE MODULE_AUTHOR("Thomas Davis "); MODULE_DESCRIPTION("SMC IrCC controller driver"); MODULE_PARM(ircc_debug,"1i"); MODULE_PARM(ircc_dma, "1i"); MODULE_PARM(ircc_irq, "1i"); /* * Function init_module (void) * * * */ int init_module(void) { return ircc_init(); } /* * Function cleanup_module (void) * * * */ void cleanup_module(void) { ircc_cleanup(); } #endif