/********************************************************************* * * Filename: uircc.c * Version: 0.1 * Description: Driver for the Sharp Universal Infrared * Communications Controller (UIRCC) * Status: Experimental. * Author: Dag Brattli * Created at: Sat Dec 26 10:59:03 1998 * Modified at: Fri Jan 8 13:06:01 1999 * Modified by: Dag Brattli * * Copyright (c) 1998 Dag Brattli, 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. * * Neither Dag Brattli nor University of Tromsų admit liability nor * provide warranty for any of this software. This material is * provided "AS-IS" and at no charge. * * Applicable Models : Tecra 510CDT, 500C Series, 530CDT, 520CDT, * 740CDT, Portege 300CT, 660CDT, Satellite 220C Series, * Satellite Pro, 440C Series, 470CDT, 460C Series, 480C Series * ********************************************************************/ #include #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 = "uircc"; #define CHIP_IO_EXTENT 16 static unsigned int io[] = { 0x300, ~0, ~0, ~0 }; static unsigned int io2[] = { 0x3e8, 0, 0, 0}; static unsigned int irq[] = { 11, 0, 0, 0 }; static unsigned int dma[] = { 5, 0, 0, 0 }; static struct uircc *dev_self[] = { NULL, NULL, NULL, NULL}; /* Some prototypes */ static int uircc_open( int i, unsigned int iobase, unsigned int board_addr, unsigned int irq, unsigned int dma); static int uircc_close( struct irda_device *idev); static int uircc_probe( int iobase, int board_addr, int irq, int dma); static int uircc_dma_receive( struct irda_device *idev); static int uircc_dma_receive_complete(struct irda_device *idev, int iobase); static int uircc_hard_xmit( struct sk_buff *skb, struct device *dev); static void uircc_dma_write( struct irda_device *idev, int iobase); static void uircc_change_speed( struct irda_device *idev, int baud); static void uircc_interrupt(int irq, void *dev_id, struct pt_regs *regs); static void uircc_wait_until_sent( struct irda_device *idev); static int uircc_is_receiving( struct irda_device *idev); static int uircc_net_init( struct device *dev); static int uircc_net_open( struct device *dev); static int uircc_net_close( struct device *dev); /* * Function uircc_init () * * Initialize chip. Just try to find out how many chips we are dealing with * and where they are */ __initfunc(int uircc_init(void)) { int i; for ( i=0; (io[i] < 2000) && (i < 4); i++) { int ioaddr = io[i]; if (check_region(ioaddr, CHIP_IO_EXTENT)) continue; if (uircc_open( i, io[i], io2[i], irq[i], dma[i]) == 0) return 0; } return -ENODEV; } /* * Function uircc_cleanup () * * Close all configured chips * */ #ifdef MODULE static void uircc_cleanup(void) { int i; DEBUG( 4, __FUNCTION__ "()\n"); for ( i=0; i < 4; i++) { if ( dev_self[i]) uircc_close( &(dev_self[i]->idev)); } } #endif /* MODULE */ /* * Function uircc_open (iobase, irq) * * Open driver instance * */ static int uircc_open( int i, unsigned int iobase, unsigned int iobase2, unsigned int irq, unsigned int dma) { struct uircc *self; struct irda_device *idev; int ret; DEBUG( 0, __FUNCTION__ "()\n"); if (( uircc_probe( iobase, iobase2, irq, dma)) == -1) return -1; /* * Allocate new instance of the driver */ self = kmalloc( sizeof(struct uircc), 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 uircc)); /* 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 = irq; idev->io.io_ext = CHIP_IO_EXTENT; idev->io.io_ext2 = 8; /* Used by irport */ idev->io.dma = 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); /* uircc_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); /* uircc_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); /* 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); idev->qos.min_turn_time.bits = 0x07; irda_qos_bits_to_value( &idev->qos); /* 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->hard_xmit = uircc_hard_xmit; idev->change_speed = uircc_change_speed; idev->wait_until_sent = uircc_wait_until_sent; idev->is_receiving = uircc_is_receiving; /* Override the network functions we need to use */ idev->netdev.init = uircc_net_init; idev->netdev.hard_start_xmit = uircc_hard_xmit; idev->netdev.open = uircc_net_open; idev->netdev.stop = uircc_net_close; irport_open( iobase2); /* Open the IrDA device */ irda_device_open( idev, driver_name, self); return 0; } /* * Function uircc_close (idev) * * Close driver instance * */ static int uircc_close( struct irda_device *idev) { int iobase; DEBUG( 4, __FUNCTION__ "()\n"); ASSERT( idev != NULL, return -1;); ASSERT( idev->magic == IRDA_DEVICE_MAGIC, return -1;); iobase = idev->io.iobase; /* Disable modem */ outb( 0x00, iobase+UIRCC_CR10); irport_close( idev->io.iobase2); /* Release the PORT that this driver is using */ DEBUG( 4, __FUNCTION__ "(), Releasing Region %03x\n", idev->io.iobase); release_region( idev->io.iobase, idev->io.io_ext); if ( idev->io.iobase2) { DEBUG( 4, __FUNCTION__ "(), Releasing Region %03x\n", idev->io.iobase2); release_region( idev->io.iobase2, idev->io.io_ext2); } irda_device_close( idev); return 0; } /* * Function uircc_probe (iobase, board_addr, irq, dma) * * Returns non-negative on success. * */ static int uircc_probe( int iobase, int iobase2, int irq, int dma) { int version; int probe_irq=0; unsigned long mask; DEBUG( 0, __FUNCTION__ "()\n"); /* read the chip version, should be 0x03 */ version = inb( iobase+UIRCC_SR8); if ( version != 0x03) { DEBUG( 0, __FUNCTION__ "(), Wrong chip version"); return -1; } DEBUG( 0, "UIRCC driver loaded. Version: 0x%02x\n", version); /* Reset chip */ outb( UIRCC_CR0_SYS_RST, iobase+UIRCC_CR0); /* Initialize some registers */ outb( 0, iobase+UIRCC_CR11); outb( 0, iobase+UIRCC_CR9); /* Enable DMA single mode */ outb( UIRCC_CR1_RX_DMA|UIRCC_CR1_TX_DMA|UIRCC_CR1_MUST_SET, iobase+UIRCC_CR1); /* Disable interrupts */ outb( 0, iobase+UIRCC_CR2); #if 1 /* Set appropriate speed mode */ outb( UIRCC_CR10_FIR, iobase+UIRCC_CR10); /* Set up timer */ outb( 0x01, iobase+UIRCC_CR12); outb( 0x00, iobase+UIRCC_CR13); /* Set interrupt mask */ outb( 0xff, iobase+UIRCC_CR2); mask = probe_irq_on(); /* Enable timer */ outb( 0x08, iobase+UIRCC_CR11); udelay( 1000); /* Wait for interrupt! */ /* Diable timer */ outb( 0x00, iobase+UIRCC_CR11); probe_irq = probe_irq_off( mask); DEBUG( 0, "Found irq=%d\n", probe_irq); #endif /* Set self poll address */ return 0; } /* * Function uircc_change_speed (idev, baud) * * Change the speed of the device * */ static void uircc_change_speed( struct irda_device *idev, int speed) { int iobase; int modem = UIRCC_CR10_SIR; DEBUG( 0, __FUNCTION__ "()\n"); ASSERT( idev != NULL, return;); ASSERT( idev->magic == IRDA_DEVICE_MAGIC, return;); iobase = idev->io.iobase; /* Update accounting for new speed */ idev->io.baudrate = speed; /* Disable interrupts */ outb( 0, iobase+UIRCC_CR2); switch ( speed) { case 9600: case 19200: case 37600: case 57600: case 115200: irport_change_speed( idev->io.iobase2, speed); modem = UIRCC_CR10_SIR; break; case 576000: DEBUG(0, __FUNCTION__ "(), handling baud of 576000\n"); break; case 1152000: DEBUG(0, __FUNCTION__ "(), handling baud of 1152000\n"); break; case 4000000: modem = UIRCC_CR10_FIR; DEBUG(0, __FUNCTION__ "(), handling baud of 4000000\n"); break; default: DEBUG( 0, __FUNCTION__ "(), unknown baud rate of %d\n", speed); break; } /* Set appropriate speed mode */ outb( modem, iobase+UIRCC_CR10); idev->netdev.tbusy = 0; /* Enable some interrupts so we can receive frames */ if ( speed > 115200) { outb( UIRCC_CR2_RECV_MASK, iobase+UIRCC_CR2); uircc_dma_receive( idev); } } /* * Function uircc_hard_xmit (skb, dev) * * Transmit the frame! * */ static int uircc_hard_xmit( struct sk_buff *skb, struct device *dev) { struct irda_device *idev; int iobase; int mtt; idev = (struct irda_device *) dev->priv; ASSERT( idev != NULL, return 0;); ASSERT( idev->magic == IRDA_DEVICE_MAGIC, return 0;); iobase = idev->io.iobase; DEBUG(0, __FUNCTION__ "(%ld), skb->len=%d\n", jiffies, (int) skb->len); /* Use irport for SIR speeds */ if ( idev->io.baudrate <= 115200) { return irport_hard_xmit( skb, dev); } if ( dev->tbusy) { DEBUG( 4, __FUNCTION__ "(), tbusy==TRUE\n"); return -EBUSY; } /* Lock transmit buffer */ if ( irda_lock( (void *) &dev->tbusy) == FALSE) return -EBUSY; memcpy( idev->tx_buff.data, 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.head = idev->tx_buff.data; idev->tx_buff.offset = 0; mtt = irda_get_mtt( skb); /* Use udelay for delays less than 50 us. */ if (mtt) udelay( mtt); /* Enable transmit interrupts */ outb( UIRCC_CR2_XMIT_MASK, iobase+UIRCC_CR2); uircc_dma_write( idev, iobase); dev_kfree_skb( skb); return 0; } /* * Function uircc_dma_xmit (idev, iobase) * * Transmit data using DMA * */ static void uircc_dma_write( struct irda_device *idev, int iobase) { struct uircc *self; int i; DEBUG( 0, __FUNCTION__ "()\n"); ASSERT( idev != NULL, return;); ASSERT( idev->magic == IRDA_DEVICE_MAGIC, return;); self = idev->priv; /* Receiving disable */ self->cr3 &= ~UIRCC_CR3_RECV_EN; outb( self->cr3, iobase+UIRCC_CR3); setup_dma( idev->io.dma, idev->tx_buff.data, idev->tx_buff.len, DMA_MODE_WRITE); DEBUG( 0, __FUNCTION__ "residue=%d\n", get_dma_residue( idev->io.dma)); idev->io.direction = IO_XMIT; /* Set frame length */ outb( idev->tx_buff.len & 0xff, iobase+UIRCC_CR4); /* Low byte */ outb( idev->tx_buff.len >> 8, iobase+UIRCC_CR5); /* High byte */ /* Enable transmit and transmit CRC */ self->cr3 |= (UIRCC_CR3_XMIT_EN|UIRCC_CR3_TX_CRC_EN); outb( self->cr3, iobase+UIRCC_CR3); for (i=0;i<5;i++) { DEBUG( 0, __FUNCTION__ "residue=%d\n", get_dma_residue( idev->io.dma)); udelay(100000); } } /* * Function uircc_dma_xmit_complete (idev) * * The transfer of a frame in finished. This function will only be called * by the interrupt handler * */ static void uircc_dma_xmit_complete( struct irda_device *idev, int underrun) { struct uircc *self; int iobase; int len; DEBUG( 0, __FUNCTION__ "()\n"); ASSERT( idev != NULL, return;); ASSERT( idev->magic == IRDA_DEVICE_MAGIC, return;); self = idev->priv; iobase = idev->io.iobase; /* Select TX counter */ outb( UIRCC_CR0_CNT_SWT, iobase+UIRCC_CR0); /* Read TX length counter */ len = inb( iobase+UIRCC_SR4); /* Low byte */ len |= inb( iobase+UIRCC_SR5) << 8; /* High byte */ /* Disable transmit */ self->cr3 &= ~UIRCC_CR3_XMIT_EN; outb( self->cr3, iobase+UIRCC_CR3); /* 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); } /* * Function uircc_dma_receive (idev) * * Get ready for receiving a frame. The device will initiate a DMA * if it starts to receive a frame. * */ static int uircc_dma_receive( struct irda_device *idev) { struct uircc *self; int iobase; ASSERT( idev != NULL, return -1;); ASSERT( idev->magic == IRDA_DEVICE_MAGIC, return -1;); DEBUG( 0, __FUNCTION__ "\n"); self = idev->priv; iobase= idev->io.iobase; /* Disable DMA */ 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.head = idev->rx_buff.data; idev->rx_buff.offset = 0; /* Enable receiving with CRC */ self->cr3 |= (UIRCC_CR3_RECV_EN|UIRCC_CR3_RX_CRC_EN); outb( self->cr3, iobase+UIRCC_CR3); /* Address check? */ DEBUG( 4, __FUNCTION__ "(), done!\n"); return 0; } /* * Function uircc_dma_receive_complete (idev) * * Finished with receiving frames * * */ static int uircc_dma_receive_complete( struct irda_device *idev, int iobase) { struct sk_buff *skb; struct uircc *self; int len; self = idev->priv; DEBUG( 0, __FUNCTION__ "()\n"); /* Check for CRC or framing error */ if ( inb( iobase+UIRCC_SR0) & UIRCC_SR0_RX_CRCFRM) { DEBUG( 0, __FUNCTION__ "(), crc or frm error\n"); return -1; } /* Select receive length counter */ outb( 0x00, iobase+UIRCC_CR0); /* Read frame length */ len = inb( iobase+UIRCC_SR4); /* Low byte */ len |= inb( iobase+UIRCC_SR5) << 8; /* High byte */ DEBUG( 0, __FUNCTION__ "(), len=%d\n", len); /* Receiving disable */ self->cr3 &= ~UIRCC_CR3_RECV_EN; outb( self->cr3, iobase+UIRCC_CR3); return TRUE; } /* * Function uircc_interrupt (irq, dev_id, regs) * * An interrupt from the chip has arrived. Time to do some work * */ static void uircc_interrupt(int irq, void *dev_id, struct pt_regs *regs) { __u8 sr3; int iobase; struct irda_device *idev = (struct irda_device *) dev_id; if (idev == NULL) { printk( KERN_WARNING "%s: irq %d for unknown device.\n", driver_name, irq); return; } if (idev->io.baudrate <= 115200) return irport_interrupt( irq, dev_id, regs); idev->netdev.interrupt = 1; iobase = idev->io.iobase; /* Read interrupt status */ sr3 = inb( iobase+UIRCC_SR3); DEBUG( 0, __FUNCTION__ "(), sr3=%#x\n", sr3); /* * Check what interrupt this is. The UIRCC will not report two * different interrupts at the same time! */ switch( sr3) { case UIRCC_SR3_RX_EOF: /* Check of end of frame */ uircc_dma_receive_complete( idev, iobase); break; case UIRCC_SR3_TXUR: /* Check for transmit underrun */ uircc_dma_xmit_complete( idev, TRUE); break; case UIRCC_SR3_TX_DONE: uircc_dma_xmit_complete( idev, FALSE); break; case UIRCC_SR3_TMR_OUT: /* Disable timer */ outb( inb( iobase+UIRCC_CR11) & ~UIRCC_CR11_TMR_EN, iobase+UIRCC_CR11); break; default: DEBUG( 0, __FUNCTION__ "(), unknown interrupt status=%#x\n", sr3); break; } idev->netdev.interrupt = 0; } /* * Function uircc_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 uircc_wait_until_sent( struct irda_device *idev) { /* Just delay 60 ms */ current->state = TASK_INTERRUPTIBLE; schedule_timeout(6); } /* * Function uircc_is_receiving (idev) * * Return TRUE is we are currently receiving a frame * */ static int uircc_is_receiving( struct irda_device *idev) { int status = FALSE; /* int iobase; */ ASSERT( idev != NULL, return FALSE;); ASSERT( idev->magic == IRDA_DEVICE_MAGIC, return FALSE;); if ( idev->io.baudrate > 115200) { } else status = ( idev->rx_buff.state != OUTSIDE_FRAME); return status; } /* * Function uircc_net_init (dev) * * Initialize network device * */ static int uircc_net_init( struct device *dev) { DEBUG( 4, __FUNCTION__ "()\n"); /* Setup to be a normal IrDA network device driver */ irda_device_setup( dev); /* Insert overrides below this line! */ return 0; } /* * Function uircc_net_open (dev) * * Start the device * */ static int uircc_net_open( struct device *dev) { struct irda_device *idev; int iobase; DEBUG( 4, __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, uircc_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; return 0; } /* * Function uircc_net_close (dev) * * Stop the device * */ static int uircc_net_close(struct device *dev) { struct irda_device *idev; int iobase; DEBUG( 4, __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; return 0; } #ifdef MODULE /* * Function init_module (void) * * * */ int init_module(void) { uircc_init(); return(0); } /* * Function cleanup_module (void) * * * */ void cleanup_module(void) { uircc_cleanup(); } #endif