/********************************************************************* * * Filename: pc87108.c * Version: 0.8 * Description: FIR/MIR driver for the NS PC87108 chip * Status: Experimental. * Author: Dag Brattli * Created at: Sat Nov 7 21:43:15 1998 * Modified at: Mon May 24 15:19:21 1999 * Modified by: Dag Brattli * * Copyright (c) 1998-1999 Dag Brattli * Copyright (c) 1998 Lichen Wang, * Copyright (c) 1998 Actisys Corp., www.actisys.com * 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. * * 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); * * If you find bugs in this file, its very likely that the same bug * will also be in w83977af_ir.c since the implementations is quite * similar. * ********************************************************************/ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define BROKEN_DONGLE_ID static char *driver_name = "pc87108"; static int qos_mtt_bits = 0x07; /* 1 ms or more */ #define CHIP_IO_EXTENT 8 static unsigned int io[] = { 0x2f8, ~0, ~0, ~0 }; static unsigned int io2[] = { 0x150, 0, 0, 0 }; static unsigned int irq[] = { 3, 0, 0, 0 }; static unsigned int dma[] = { 0, 0, 0, 0 }; static struct pc87108 *dev_self[] = { NULL, NULL, NULL, NULL}; static char *dongle_types[] = { "Differential serial interface", "Differential serial interface", "Reserved", "Reserved", "Sharp RY5HD01", "Reserved", "Single-ended serial interface", "Consumer-IR only", "HP HSDL-2300, HP HSDL-3600/HSDL-3610", "IBM31T1100 or Temic TFDS6000/TFDS6500", "Reserved", "Reserved", "HP HSDL-1100/HSDL-2100", "HP HSDL-1100/HSDL-2100" "Supports SIR Mode only", "No dongle connected", }; /* Some prototypes */ static int pc87108_open(int i, unsigned int iobase, unsigned int board_addr, unsigned int irq, unsigned int dma); #ifdef MODULE static int pc87108_close(struct irda_device *idev); #endif /* MODULE */ static int pc87108_probe(int iobase, int board_addr, int irq, int dma); static void pc87108_pio_receive(struct irda_device *idev); static int pc87108_dma_receive(struct irda_device *idev); static int pc87108_dma_receive_complete(struct irda_device *idev, int iobase); static int pc87108_hard_xmit(struct sk_buff *skb, struct device *dev); static int pc87108_pio_write(int iobase, __u8 *buf, int len, int fifo_size); static void pc87108_dma_write(struct irda_device *idev, int iobase); static void pc87108_change_speed(struct irda_device *idev, int baud); static void pc87108_interrupt(int irq, void *dev_id, struct pt_regs *regs); static void pc87108_wait_until_sent(struct irda_device *idev); static int pc87108_is_receiving(struct irda_device *idev); static int pc87108_read_dongle_id (int iobase); static void pc87108_init_dongle_interface (int iobase, int dongle_id); static int pc87108_net_init(struct device *dev); static int pc87108_net_open(struct device *dev); static int pc87108_net_close(struct device *dev); /* * Function pc87108_init () * * Initialize chip. Just try to find out how many chips we are dealing with * and where they are */ int __init pc87108_init(void) { int i; for (i=0; (io[i] < 2000) && (i < 4); i++) { int ioaddr = io[i]; if (check_region(ioaddr, CHIP_IO_EXTENT) < 0) continue; if (pc87108_open(i, io[i], io2[i], irq[i], dma[i]) == 0) return 0; } return -ENODEV; } /* * Function pc87108_cleanup () * * Close all configured chips * */ #ifdef MODULE static void pc87108_cleanup(void) { int i; DEBUG(4, __FUNCTION__ "()\n"); for (i=0; i < 4; i++) { if (dev_self[i]) pc87108_close(&(dev_self[i]->idev)); } } #endif /* MODULE */ /* * Function pc87108_open (iobase, irq) * * Open driver instance * */ static int pc87108_open(int i, unsigned int iobase, unsigned int board_addr, unsigned int irq, unsigned int dma) { struct pc87108 *self; struct irda_device *idev; int ret; int dongle_id; DEBUG(0, __FUNCTION__ "()\n"); if ((dongle_id = pc87108_probe(iobase, board_addr, irq, dma)) == -1) return -1; /* * Allocate new instance of the driver */ self = kmalloc(sizeof(struct pc87108), 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 pc87108)); /* Need to store self somewhere */ dev_self[i] = self; idev = &self->idev; /* Initialize IO */ idev->io.iobase = iobase; idev->io.irq = irq; idev->io.io_ext = CHIP_IO_EXTENT; idev->io.dma = dma; idev->io.fifo_size = 32; /* 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); /* pc87108_cleanup( self->idev); */ return -ENODEV; } request_region(idev->io.iobase, idev->io.io_ext, 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 = qos_mtt_bits; irda_qos_bits_to_value(&idev->qos); idev->flags = IFF_FIR|IFF_MIR|IFF_SIR|IFF_DMA|IFF_PIO|IFF_DONGLE; /* 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 = 14384; idev->tx_buff.truesize = 4000; /* Initialize callbacks */ idev->change_speed = pc87108_change_speed; idev->wait_until_sent = pc87108_wait_until_sent; idev->is_receiving = pc87108_is_receiving; /* Override the network functions we need to use */ idev->netdev.init = pc87108_net_init; idev->netdev.hard_start_xmit = pc87108_hard_xmit; idev->netdev.open = pc87108_net_open; idev->netdev.stop = pc87108_net_close; idev->io.dongle_id = dongle_id; pc87108_init_dongle_interface(iobase, dongle_id); /* Open the IrDA device */ irda_device_open(idev, driver_name, self); return 0; } #ifdef MODULE /* * Function pc87108_close (idev) * * Close driver instance * */ static int pc87108_close(struct irda_device *idev) { struct pc87108 *self; int iobase; DEBUG( 4, __FUNCTION__ "()\n"); ASSERT(idev != NULL, return -1;); ASSERT(idev->magic == IRDA_DEVICE_MAGIC, return -1;); iobase = idev->io.iobase; self = (struct pc87108 *) idev->priv; /* 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); irda_device_close(idev); kfree(self); return 0; } #endif /* MODULE */ /* * Function pc87108_probe (iobase, board_addr, irq, dma) * * Returns non-negative on success. * */ static int pc87108_probe(int iobase, int board_addr, int irq, int dma) { int version; __u8 temp=0; int dongle_id; DEBUG(4, __FUNCTION__ "()\n"); /* Base Address and Interrupt Control Register BAIC */ outb(0, board_addr); switch (iobase) { case 0x3E8: outb(0x14, board_addr+1); break; case 0x2E8: outb(0x15, board_addr+1); break; case 0x3F8: outb(0x16, board_addr+1); break; case 0x2F8: outb(0x17, board_addr+1); break; default: ERROR(__FUNCTION__ "(), invalid base_address"); } /* Control Signal Routing Register CSRT */ switch (irq) { case 3: temp = 0x01; break; case 4: temp = 0x02; break; case 5: temp = 0x03; break; case 7: temp = 0x04; break; case 9: temp = 0x05; break; case 11: temp = 0x06; break; case 15: temp = 0x07; break; default: ERROR(__FUNCTION__ "(), invalid irq"); } outb(1, board_addr); switch (dma) { case 0: outb(0x08+temp, board_addr+1); break; case 1: outb(0x10+temp, board_addr+1); break; case 3: outb(0x18+temp, board_addr+1); break; default: DEBUG( 0, __FUNCTION__ "(), invalid dma"); } /* Mode Control Register MCTL */ outb(2, board_addr); outb(0x03, board_addr+1); /* read the Module ID */ switch_bank(iobase, BANK3); version = inb(iobase+MID); /* should be 0x2? */ if (0x20 != (version & 0xf0)) { ERROR(__FUNCTION__ "(), Wrong chip version %02x\n", version); return -1; } /* Switch to advanced mode */ switch_bank( iobase, BANK2); outb(ECR1_EXT_SL, iobase+ECR1); switch_bank(iobase, BANK0); dongle_id = pc87108_read_dongle_id(iobase); DEBUG(0, __FUNCTION__ "(), Found dongle: %s\n", dongle_types[ dongle_id]); /* Set FIFO threshold to TX17, RX16, reset and enable FIFO's */ switch_bank(iobase, BANK0); outb(FCR_RXTH|FCR_TXTH|FCR_TXSR|FCR_RXSR|FCR_FIFO_EN, iobase+FCR); /* Set FIFO size to 32 */ switch_bank(iobase, BANK2); outb(EXCR2_RFSIZ|EXCR2_TFSIZ, iobase+EXCR2); /* IRCR2: FEND_MD is set */ switch_bank(iobase, BANK5); outb(0x2a, iobase+4); /* Make sure that some defaults are OK */ switch_bank(iobase, BANK6); outb(0x20, iobase+0); /* Set 32 bits FIR CRC */ outb(0x0a, iobase+1); /* Set MIR pulse width */ outb(0x0d, iobase+2); /* Set SIR pulse width */ outb(0x2a, iobase+4); /* Set beginning frag, and preamble length */ /* Receiver frame length */ switch_bank(iobase, BANK4); outb(2048 & 0xff, iobase+6); outb((2048 >> 8) & 0x1f, iobase+7); /* Transmitter frame length */ outb(2048 & 0xff, iobase+4); outb((2048 >> 8) & 0x1f, iobase+5); DEBUG(0, "PC87108 driver loaded. Version: 0x%02x\n", version); /* Enable receive interrupts */ switch_bank(iobase, BANK0); outb(IER_RXHDL_IE, iobase+IER); return dongle_id; } /* * Function pc87108_read_dongle_id (void) * * Try to read dongle indentification. This procedure needs to be executed * once after power-on/reset. It also needs to be used whenever you suspect * that the user may have plugged/unplugged the IrDA Dongle. * */ static int pc87108_read_dongle_id ( int iobase) { int dongle_id; __u8 bank; DEBUG( 4, __FUNCTION__ "()\n"); bank = inb( iobase+BSR); /* Select Bank 7 */ switch_bank(iobase, BANK7); /* IRCFG4: IRSL0_DS and IRSL21_DS are cleared */ outb(0x00, iobase+7); /* ID0, 1, and 2 are pulled up/down very slowly */ udelay(50); /* IRCFG1: read the ID bits */ dongle_id = inb( iobase+4) & 0x0f; #ifdef BROKEN_DONGLE_ID if (dongle_id == 0x0a) dongle_id = 0x09; #endif /* Go back to bank 0 before returning */ switch_bank(iobase, BANK0); DEBUG(0, __FUNCTION__ "(), Dongle = %#x\n", dongle_id); outb(bank, iobase+BSR); return dongle_id; } /* * Function pc87108_init_dongle_interface (iobase, dongle_id) * * This function initializes the dongle for the transceiver that is * used. This procedure needs to be executed once after * power-on/reset. It also needs to be used whenever you suspect that * the dongle is changed. */ static void pc87108_init_dongle_interface (int iobase, int dongle_id) { int bank; /* Save current bank */ bank = inb( iobase+BSR); /* Select Bank 7 */ switch_bank( iobase, BANK7); /* IRCFG4: set according to dongle_id */ switch (dongle_id) { case 0x00: /* same as */ case 0x01: /* Differential serial interface */ DEBUG( 0, __FUNCTION__ "(), %s not defined by irda yet\n", dongle_types[dongle_id]); break; case 0x02: /* same as */ case 0x03: /* Reserved */ DEBUG( 0, __FUNCTION__ "(), %s not defined by irda yet\n", dongle_types[dongle_id]); break; case 0x04: /* Sharp RY5HD01 */ DEBUG( 0, __FUNCTION__ "(), %s not supported yet\n", dongle_types[dongle_id]); break; case 0x05: /* Reserved */ DEBUG( 0, __FUNCTION__ "(), %s not defined by irda yet", dongle_types[dongle_id]); break; case 0x06: /* Single-ended serial interface */ DEBUG( 0, __FUNCTION__ "(), %s not defined by irda yet\n", dongle_types[dongle_id]); break; case 0x07: /* Consumer-IR only */ DEBUG( 0, __FUNCTION__ "(), %s is not for IrDA mode\n", dongle_types[dongle_id]); break; case 0x08: /* HP HSDL-2300, HP HSDL-3600/HSDL-3610 */ DEBUG( 0, __FUNCTION__ "(), %s not supported yet\n", dongle_types[dongle_id]); break; case 0x09: /* IBM31T1100 or Temic TFDS6000/TFDS6500 */ outb_p( 0x28, iobase+7); /* Set irsl[0-2] as output */ break; case 0x0A: /* same as */ case 0x0B: /* Reserved */ DEBUG( 0, __FUNCTION__ "(), %s not defined by irda yet\n", dongle_types[dongle_id]); break; case 0x0C: /* same as */ case 0x0D: /* HP HSDL-1100/HSDL-2100 */ /* * Set irsl0 as input, irsl[1-2] as output, and separate * inputs are used for SIR and MIR/FIR */ outb( 0x48, iobase+7); break; case 0x0E: /* Supports SIR Mode only */ outb( 0x28, iobase+7); /* Set irsl[0-2] as output */ break; case 0x0F: /* No dongle connected */ DEBUG( 0, __FUNCTION__ "(), %s\n", dongle_types[dongle_id]); DEBUG( 0, "***\n"); switch_bank( iobase, BANK0); outb( 0x62, iobase+MCR); break; default: DEBUG( 0, __FUNCTION__ "(), invalid dongle_id %#x", dongle_id); } /* IRCFG1: IRSL1 and 2 are set to IrDA mode */ outb( 0x00, iobase+4); /* Restore bank register */ outb( bank, iobase+BSR); } /* set_up_dongle_interface */ /* * Function pc87108_change_dongle_speed (iobase, speed, dongle_id) * * Change speed of the attach dongle * */ static void pc87108_change_dongle_speed( int iobase, int speed, int dongle_id) { unsigned long flags; __u8 bank; DEBUG( 4, __FUNCTION__ "()\n"); /* Save current bank */ bank = inb( iobase+BSR); /* Select Bank 7 */ switch_bank( iobase, BANK7); /* IRCFG1: set according to dongle_id */ switch (dongle_id) { case 0x00: /* same as */ case 0x01: /* Differential serial interface */ DEBUG( 0, __FUNCTION__ "(), %s not defined by irda yet\n", dongle_types[dongle_id]); break; case 0x02: /* same as */ case 0x03: /* Reserved */ DEBUG( 0, __FUNCTION__ "(), %s not defined by irda yet\n", dongle_types[dongle_id]); break; case 0x04: /* Sharp RY5HD01 */ DEBUG( 0, __FUNCTION__ "(), %s not supported yet\n", dongle_types[dongle_id]); case 0x05: /* Reserved */ DEBUG( 0, __FUNCTION__ "(), %s not defined by irda yet\n", dongle_types[dongle_id]); break; case 0x06: /* Single-ended serial interface */ DEBUG( 0, __FUNCTION__ "(), %s not defined by irda yet\n", dongle_types[dongle_id]); break; case 0x07: /* Consumer-IR only */ DEBUG( 0, __FUNCTION__ "(), %s is not for IrDA mode\n", dongle_types[dongle_id]); break; case 0x08: /* HP HSDL-2300, HP HSDL-3600/HSDL-3610 */ DEBUG( 0, __FUNCTION__ "(), %s not supported yet\n", dongle_types[dongle_id]); case 0x09: /* IBM31T1100 or Temic TFDS6000/TFDS6500 */ switch_bank( iobase, BANK7); outb_p( 0x01, iobase+4); if ( speed == 4000000) { save_flags(flags); cli(); outb( 0x81, iobase+4); outb( 0x80, iobase+4); restore_flags(flags); } else outb_p( 0x00, iobase+4); break; case 0x0A: /* same as */ case 0x0B: /* Reserved */ DEBUG( 0, __FUNCTION__ "(), %s not defined by irda yet\n", dongle_types[dongle_id]); break; case 0x0C: /* same as */ case 0x0D: /* HP HSDL-1100/HSDL-2100 */ break; case 0x0E: /* Supports SIR Mode only */ break; case 0x0F: /* No dongle connected */ DEBUG( 0, __FUNCTION__ "(), %s is not for IrDA mode\n", dongle_types[dongle_id]); switch_bank( iobase, BANK0); outb( 0x62, iobase+MCR); break; default: DEBUG( 0, __FUNCTION__ "(), invalid data_rate\n"); } /* Restore bank register */ outb( bank, iobase+BSR); } /* * Function pc87108_change_speed (idev, baud) * * Change the speed of the device * */ static void pc87108_change_speed( struct irda_device *idev, int speed) { __u8 mcr = MCR_SIR; __u8 bank; int iobase; DEBUG( 4, __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; /* Save current bank */ bank = inb( iobase+BSR); /* Disable interrupts */ switch_bank( iobase, BANK0); outb( 0, iobase+IER); /* Select Bank 2 */ switch_bank( iobase, BANK2); outb( 0x00, iobase+BGDH); switch ( speed) { case 9600: outb( 0x0c, iobase+BGDL); break; case 19200: outb( 0x06, iobase+BGDL); break; case 37600: outb( 0x03, iobase+BGDL); break; case 57600: outb( 0x02, iobase+BGDL); break; case 115200: outb( 0x01, iobase+BGDL); break; case 576000: switch_bank( iobase, BANK5); /* IRCR2: MDRS is set */ outb( inb( iobase+4) | 0x04, iobase+4); mcr = MCR_MIR; DEBUG(0, __FUNCTION__ "(), handling baud of 576000\n"); break; case 1152000: mcr = MCR_MIR; DEBUG(0, __FUNCTION__ "(), handling baud of 1152000\n"); break; case 4000000: mcr = MCR_FIR; DEBUG(0, __FUNCTION__ "(), handling baud of 4000000\n"); break; default: mcr = MCR_FIR; DEBUG( 0, __FUNCTION__ "(), unknown baud rate of %d\n", speed); break; } /* Set appropriate speed mode */ switch_bank(iobase, BANK0); outb(mcr | MCR_TX_DFR, iobase+MCR); /* Give some hits to the transceiver */ pc87108_change_dongle_speed( iobase, speed, idev->io.dongle_id); /* Set FIFO threshold to TX17, RX16 */ switch_bank( iobase, BANK0); outb( FCR_RXTH| /* Set Rx FIFO threshold */ FCR_TXTH| /* Set Tx FIFO threshold */ FCR_TXSR| /* Reset Tx FIFO */ FCR_RXSR| /* Reset Rx FIFO */ FCR_FIFO_EN, /* Enable FIFOs */ iobase+FCR); /* outb( 0xa7, iobase+FCR); */ /* Set FIFO size to 32 */ switch_bank( iobase, BANK2); outb( EXCR2_RFSIZ|EXCR2_TFSIZ, iobase+EXCR2); idev->netdev.tbusy = 0; /* Enable some interrupts so we can receive frames */ switch_bank( iobase, BANK0); if ( speed > 115200) { outb( IER_SFIF_IE, iobase+IER); pc87108_dma_receive( idev); } else outb( IER_RXHDL_IE, iobase+IER); /* Restore BSR */ outb( bank, iobase+BSR); } /* * Function pc87108_hard_xmit (skb, dev) * * Transmit the frame! * */ static int pc87108_hard_xmit( struct sk_buff *skb, struct device *dev) { struct irda_device *idev; int iobase; __u8 bank; 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(4, __FUNCTION__ "(%ld), skb->len=%d\n", jiffies, (int) skb->len); /* Lock transmit buffer */ if ( irda_lock( (void *) &dev->tbusy) == FALSE) return -EBUSY; /* Save current bank */ bank = inb( iobase+BSR); /* Decide if we should use PIO or DMA transfer */ if ( idev->io.baudrate > 115200) { idev->tx_buff.data = idev->tx_buff.head; memcpy(idev->tx_buff.data, skb->data, skb->len); idev->tx_buff.len = skb->len; mtt = irda_get_mtt( skb); if ( mtt > 50) { /* Adjust for timer resolution */ mtt = mtt / 125 + 1; /* Setup timer */ switch_bank( iobase, BANK4); outb( mtt & 0xff, iobase+TMRL); outb(( mtt >> 8) & 0x0f, iobase+TMRH); /* Start timer */ outb( IRCR1_TMR_EN, iobase+IRCR1); idev->io.direction = IO_XMIT; /* Enable timer interrupt */ switch_bank( iobase, BANK0); outb( IER_TMR_IE, iobase+IER); } else { /* Use udelay for delays less than 50 us. */ if (mtt) udelay( mtt); /* Enable DMA interrupt */ switch_bank( iobase, BANK0); outb( IER_DMA_IE, iobase+IER); pc87108_dma_write( idev, iobase); } } else { idev->tx_buff.len = async_wrap_skb(skb, idev->tx_buff.data, idev->tx_buff.truesize); idev->tx_buff.data = idev->tx_buff.head; /* Add interrupt on tx low level (will fire immediately) */ switch_bank( iobase, BANK0); outb( IER_TXLDL_IE, iobase+IER); } dev_kfree_skb( skb); /* Restore bank register */ outb( bank, iobase+BSR); return 0; } /* * Function pc87108_dma_xmit (idev, iobase) * * Transmit data using DMA * */ static void pc87108_dma_write( struct irda_device *idev, int iobase) { int bsr; DEBUG( 4, __FUNCTION__ "()\n"); /* Save current bank */ bsr = inb( iobase+BSR); /* Disable DMA */ switch_bank(iobase, BANK0); outb( inb( iobase+MCR) & ~MCR_DMA_EN, iobase+MCR); setup_dma(idev->io.dma, idev->tx_buff.data, idev->tx_buff.len, DMA_MODE_WRITE); idev->io.direction = IO_XMIT; /* Choose transmit DMA channel */ switch_bank(iobase, BANK2); outb( inb( iobase+ECR1) | ECR1_DMASWP|ECR1_DMANF|ECR1_EXT_SL, iobase+ECR1); /* Enable DMA */ switch_bank(iobase, BANK0); outb(inb(iobase+MCR)|MCR_DMA_EN, iobase+MCR); /* Restore bank register */ outb(bsr, iobase+BSR); } /* * Function pc87108_pio_xmit (idev, iobase) * * Transmit data using PIO. Returns the number of bytes that actually * got transfered * */ static int pc87108_pio_write(int iobase, __u8 *buf, int len, int fifo_size) { int actual = 0; __u8 bank; DEBUG( 4, __FUNCTION__ "()\n"); /* Save current bank */ bank = inb( iobase+BSR); switch_bank( iobase, BANK0); if (!(inb_p( iobase+LSR) & LSR_TXEMP)) { DEBUG( 4, __FUNCTION__ "(), warning, FIFO not empty yet!\n"); fifo_size -= 17; DEBUG( 4, __FUNCTION__ "%d bytes left in tx fifo\n", fifo_size); } /* Fill FIFO with current frame */ while ((fifo_size-- > 0) && (actual < len)) { /* Transmit next byte */ outb(buf[actual++], iobase+TXD); } DEBUG(4, __FUNCTION__ "(), fifo_size %d ; %d sent of %d\n", fifo_size, actual, len); /* Restore bank */ outb(bank, iobase+BSR); return actual; } /* * Function pc87108_dma_xmit_complete (idev) * * The transfer of a frame in finished. This function will only be called * by the interrupt handler * */ static void pc87108_dma_xmit_complete( struct irda_device *idev) { int iobase; __u8 bank; DEBUG( 4, __FUNCTION__ "()\n"); ASSERT( idev != NULL, return;); ASSERT( idev->magic == IRDA_DEVICE_MAGIC, return;); iobase = idev->io.iobase; /* Save current bank */ bank = inb( iobase+BSR); /* Disable DMA */ switch_bank( iobase, BANK0); outb( inb(iobase+MCR) & ~MCR_DMA_EN, iobase+MCR); /* Check for underrrun! */ if ( inb( iobase+ASCR) & ASCR_TXUR) { idev->stats.tx_errors++; idev->stats.tx_fifo_errors++; /* Clear bit, by writing 1 into it */ outb( ASCR_TXUR, iobase+ASCR); } 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); /* Restore bank */ outb( bank, iobase+BSR); } /* * Function pc87108_dma_receive (idev) * * Get ready for receiving a frame. The device will initiate a DMA * if it starts to receive a frame. * */ static int pc87108_dma_receive(struct irda_device *idev) { struct pc87108 *self; int iobase; __u8 bsr; ASSERT(idev != NULL, return -1;); ASSERT(idev->magic == IRDA_DEVICE_MAGIC, return -1;); DEBUG(4, __FUNCTION__ "\n"); self = idev->priv; iobase = idev->io.iobase; /* Save current bank */ bsr = inb(iobase+BSR); /* Disable DMA */ switch_bank(iobase, BANK0); outb(inb(iobase+MCR) & ~MCR_DMA_EN, iobase+MCR); 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; /* Reset Rx FIFO. This will also flush the ST_FIFO */ outb(FCR_RXTH|FCR_TXTH|FCR_RXSR|FCR_FIFO_EN, iobase+FCR); self->st_fifo.len = self->st_fifo.tail = self->st_fifo.head = 0; /* Choose DMA Rx, DMA Fairness, and Advanced mode */ switch_bank(iobase, BANK2); outb((inb( iobase+ECR1) & ~ECR1_DMASWP)|ECR1_DMANF|ECR1_EXT_SL, iobase+ECR1); /* enable DMA */ switch_bank(iobase, BANK0); outb(inb(iobase+MCR)|MCR_DMA_EN, iobase+MCR); /* Restore bank register */ outb(bsr, iobase+BSR); DEBUG(4, __FUNCTION__ "(), done!\n"); return 0; } /* * Function pc87108_dma_receive_complete (idev) * * Finished with receiving frames * * */ static int pc87108_dma_receive_complete(struct irda_device *idev, int iobase) { struct sk_buff *skb; struct pc87108 *self; struct st_fifo *st_fifo; int len; __u8 bank; __u8 status; self = idev->priv; st_fifo = &self->st_fifo; /* Save current bank */ bank = inb( iobase+BSR); /* Read status FIFO */ switch_bank(iobase, BANK5); while (( status = inb( iobase+FRM_ST)) & FRM_ST_VLD) { 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++; } /* Try to process all entries in status FIFO */ switch_bank(iobase, BANK0); 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 & FRM_ST_ERR_MSK) { if (status & FRM_ST_LOST_FR) { /* Add number of lost frames to stats */ idev->stats.rx_errors += len; } else { /* Skip frame */ idev->stats.rx_errors++; idev->rx_buff.data += len; if (status & FRM_ST_MAX_LEN) idev->stats.rx_length_errors++; if (status & FRM_ST_PHY_ERR) idev->stats.rx_frame_errors++; if (status & FRM_ST_BAD_CRC) idev->stats.rx_crc_errors++; } /* The errors below can be reported in both cases */ if (status & FRM_ST_OVR1) idev->stats.rx_fifo_errors++; if (status & FRM_ST_OVR2) idev->stats.rx_fifo_errors++; } else { /* Check if we have transfered all data to memory */ if (inb(iobase+LSR) & LSR_RXDA) { /* 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 bank register */ outb(bank, iobase+BSR); return FALSE; /* I'll be back! */ } /* Should be OK then */ skb = dev_alloc_skb(len+1); if (skb == NULL) { printk( KERN_INFO __FUNCTION__ "(), memory squeeze, dropping frame.\n"); /* Restore bank register */ outb( bank, iobase+BSR); return FALSE; } /* Make sure IP header gets aligned */ skb_reserve(skb, 1); /* Copy frame without CRC */ if (idev->io.baudrate < 4000000) { skb_put(skb, len-2); memcpy(skb->data, idev->rx_buff.data, len-2); } else { skb_put(skb, len-4); memcpy(skb->data, idev->rx_buff.data, len-4); } /* Move to next frame */ 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); } } /* Restore bank register */ outb(bank, iobase+BSR); return TRUE; } /* * Function pc87108_pio_receive (idev) * * Receive all data in receiver FIFO * */ static void pc87108_pio_receive( struct irda_device *idev) { __u8 byte = 0x00; int iobase; DEBUG(4, __FUNCTION__ "()\n"); ASSERT(idev != NULL, return;); ASSERT(idev->magic == IRDA_DEVICE_MAGIC, return;); iobase = idev->io.iobase; /* Receive all characters in Rx FIFO */ do { byte = inb(iobase+RXD); async_unwrap_char(idev, byte); } while (inb(iobase+LSR) & LSR_RXDA); /* Data available */ } /* * Function pc87108_sir_interrupt (idev, eir) * * Handle SIR interrupt * */ static __u8 pc87108_sir_interrupt(struct irda_device *idev, int eir) { int actual; __u8 new_ier = 0; /* Transmit FIFO low on data */ if ( eir & EIR_TXLDL_EV) { /* Write data left in transmit buffer */ actual = pc87108_pio_write(idev->io.iobase, idev->tx_buff.data, idev->tx_buff.len, idev->io.fifo_size); idev->tx_buff.data += actual; idev->tx_buff.len -= actual; idev->io.direction = IO_XMIT; /* Check if finished */ if (idev->tx_buff.len > 0) new_ier |= IER_TXLDL_IE; else { idev->netdev.tbusy = 0; /* Unlock */ idev->stats.tx_packets++; mark_bh(NET_BH); new_ier |= IER_TXEMP_IE; } } /* Check if transmission has completed */ if ( eir & EIR_TXEMP_EV) { /* Turn around and get ready to receive some data */ idev->io.direction = IO_RECV; new_ier |= IER_RXHDL_IE; } /* Rx FIFO threshold or timeout */ if ( eir & EIR_RXHDL_EV) { pc87108_pio_receive( idev); /* Keep receiving */ new_ier |= IER_RXHDL_IE; } return new_ier; } /* * Function pc87108_fir_interrupt (idev, eir) * * Handle MIR/FIR interrupt * */ static __u8 pc87108_fir_interrupt( struct irda_device *idev, int iobase, int eir) { __u8 new_ier = 0; __u8 bank; bank = inb( iobase+BSR); /* Status event, or end of frame detected in FIFO */ if (eir & (EIR_SFIF_EV|EIR_LS_EV)) { if (pc87108_dma_receive_complete( idev, iobase)) { /* Wait for next status FIFO interrupt */ new_ier |= IER_SFIF_IE; } else { /* DMA not finished yet */ /* Set timer value, resolution 125 us */ switch_bank( iobase, BANK4); outb( 0x0f, iobase+TMRL); /* 125 us */ outb( 0x00, iobase+TMRH); /* Start timer */ outb( IRCR1_TMR_EN, iobase+IRCR1); new_ier |= IER_TMR_IE; } } /* Timer finished */ if ( eir & EIR_TMR_EV) { /* Disable timer */ switch_bank( iobase, BANK4); outb( 0, iobase+IRCR1); /* Clear timer event */ switch_bank(iobase, BANK0); outb( ASCR_CTE, iobase+ASCR); /* Check if this is a TX timer interrupt */ if ( idev->io.direction == IO_XMIT) { pc87108_dma_write( idev, iobase); /* Interrupt on DMA */ new_ier |= IER_DMA_IE; } else { /* Check if DMA has now finished */ pc87108_dma_receive_complete( idev, iobase); new_ier |= IER_SFIF_IE; } } /* Finished with transmission */ if ( eir & EIR_DMA_EV) { pc87108_dma_xmit_complete( idev); /* Check if there are more frames to be transmitted */ if ( irda_device_txqueue_empty( idev)) { /* Prepare for receive */ pc87108_dma_receive( idev); new_ier = IER_LS_IE|IER_SFIF_IE; } } outb( bank, iobase+BSR); return new_ier; } /* * Function pc87108_interrupt (irq, dev_id, regs) * * An interrupt from the chip has arrived. Time to do some work * */ static void pc87108_interrupt(int irq, void *dev_id, struct pt_regs *regs) { __u8 bsr, eir, ier; 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; } idev->netdev.interrupt = 1; iobase = idev->io.iobase; /* Save current bank */ bsr = inb( iobase+BSR); switch_bank( iobase, BANK0); ier = inb( iobase+IER); eir = inb( iobase+EIR) & ier; /* Mask out the interesting ones */ outb( 0, iobase+IER); /* Disable interrupts */ if ( eir) { /* Dispatch interrupt handler for the current speed */ if ( idev->io.baudrate > 115200) ier = pc87108_fir_interrupt( idev, iobase, eir); else ier = pc87108_sir_interrupt( idev, eir); } outb( ier, iobase+IER); /* Restore interrupts */ outb( bsr, iobase+BSR); /* Restore bank register */ idev->netdev.interrupt = 0; } /* * Function pc87108_wait_until_sent (idev) * * This function should put the current thread to sleep until all data * have been sent, so it is safe to f.eks. change the speed. */ static void pc87108_wait_until_sent( struct irda_device *idev) { /* Just delay 60 ms */ current->state = TASK_INTERRUPTIBLE; schedule_timeout(6); } /* * Function pc87108_is_receiving (idev) * * Return TRUE is we are currently receiving a frame * */ static int pc87108_is_receiving( struct irda_device *idev) { int status = FALSE; int iobase; __u8 bank; ASSERT( idev != NULL, return FALSE;); ASSERT( idev->magic == IRDA_DEVICE_MAGIC, return FALSE;); if ( idev->io.baudrate > 115200) { iobase = idev->io.iobase; /* Check if rx FIFO is not empty */ bank = inb( iobase+BSR); switch_bank( iobase, BANK2); if (( inb( iobase+RXFLV) & 0x3f) != 0) { /* We are receiving something */ status = TRUE; } outb( bank, iobase+BSR); } else status = ( idev->rx_buff.state != OUTSIDE_FRAME); return status; } /* * Function pc87108_net_init (dev) * * Initialize network device * */ static int pc87108_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 pc87108_net_open (dev) * * Start the device * */ static int pc87108_net_open( struct device *dev) { struct irda_device *idev; int iobase; __u8 bank; 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, pc87108_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; /* Save current bank */ bank = inb( iobase+BSR); /* turn on interrupts */ switch_bank( iobase, BANK0); outb( IER_LS_IE | IER_RXHDL_IE, iobase+IER); /* Restore bank register */ outb( bank, iobase+BSR); MOD_INC_USE_COUNT; return 0; } /* * Function pc87108_net_close (dev) * * Stop the device * */ static int pc87108_net_close(struct device *dev) { struct irda_device *idev; int iobase; __u8 bank; 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); /* Save current bank */ bank = inb( iobase+BSR); /* Disable interrupts */ switch_bank( iobase, BANK0); outb( 0, iobase+IER); free_irq( idev->io.irq, idev); free_dma( idev->io.dma); /* Restore bank register */ outb( bank, iobase+BSR); MOD_DEC_USE_COUNT; return 0; } #ifdef MODULE MODULE_AUTHOR("Dag Brattli "); MODULE_DESCRIPTION("NSC PC87108 IrDA Device Driver"); MODULE_PARM(qos_mtt_bits, "i"); MODULE_PARM(io, "1-4i"); MODULE_PARM(io2, "1-4i"); MODULE_PARM(irq, "1-4i"); /* * Function init_module (void) * * * */ int init_module(void) { return pc87108_init(); } /* * Function cleanup_module (void) * * * */ void cleanup_module(void) { pc87108_cleanup(); } #endif /* MODULE */