/********************************************************************* * * Filename: nsc-ircc.c * Version: 1.0 * Description: Driver for the NSC PC'108 and PC'338 IrDA chipsets * Status: Stable. * Author: Dag Brattli * Created at: Sat Nov 7 21:43:15 1998 * Modified at: Sat Aug 14 04:14:57 2004 * Modified by: Maik Broemme * * Copyright (c) 1998-2000 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 are quite * similar. * ********************************************************************/ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define CHIP_IO_EXTENT 8 #define BROKEN_DONGLE_ID static char *driver_name = "nsc-ircc"; /* Module parameters */ static int qos_mtt_bits = 0x07; /* 1 ms or more */ static int dongle_id; /* Use BIOS settions by default, but user may supply module parameters */ static unsigned int io[] = { ~0, ~0, ~0, ~0 }; static unsigned int irq[] = { 0, 0, 0, 0, 0 }; static unsigned int dma[] = { 0, 0, 0, 0, 0 }; static int nsc_ircc_probe_108(nsc_chip_t *chip, chipio_t *info); static int nsc_ircc_probe_338(nsc_chip_t *chip, chipio_t *info); static int nsc_ircc_probe_39x(nsc_chip_t *chip, chipio_t *info); static int nsc_ircc_init_108(nsc_chip_t *chip, chipio_t *info); static int nsc_ircc_init_338(nsc_chip_t *chip, chipio_t *info); static int nsc_ircc_init_39x(nsc_chip_t *chip, chipio_t *info); /* These are the known NSC chips */ static nsc_chip_t chips[] = { /* Name, {cfg registers}, chip id index reg, chip id expected value, revision mask */ { "PC87108", { 0x150, 0x398, 0xea }, 0x05, 0x10, 0xf0, nsc_ircc_probe_108, nsc_ircc_init_108 }, { "PC87338", { 0x398, 0x15c, 0x2e }, 0x08, 0xb0, 0xf8, nsc_ircc_probe_338, nsc_ircc_init_338 }, /* Contributed by Jan Frey - IBM A30/A31 */ { "PC8739x", { 0x2e, 0x4e, 0x0 }, 0x20, 0xea, 0xff, nsc_ircc_probe_39x, nsc_ircc_init_39x }, { NULL } #if 0 /* Probably bogus, "PC8739x" should be the real thing. Jean II */ /* Contributed by Kevin Thayer - OmniBook 6100 */ { "PC87338?", { 0x2e, 0x15c, 0x398 }, 0x08, 0x00, 0xf8, nsc_ircc_probe_338, nsc_ircc_init_338 }, #endif }; /* Max 4 instances for now */ static struct nsc_ircc_cb *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 nsc_ircc_open(int i, chipio_t *info); #ifdef MODULE static int nsc_ircc_close(struct nsc_ircc_cb *self); #endif /* MODULE */ static int nsc_ircc_setup(chipio_t *info); static void nsc_ircc_pio_receive(struct nsc_ircc_cb *self); static int nsc_ircc_dma_receive(struct nsc_ircc_cb *self); static int nsc_ircc_dma_receive_complete(struct nsc_ircc_cb *self, int iobase); static int nsc_ircc_hard_xmit_sir(struct sk_buff *skb, struct net_device *dev); static int nsc_ircc_hard_xmit_fir(struct sk_buff *skb, struct net_device *dev); static int nsc_ircc_pio_write(int iobase, __u8 *buf, int len, int fifo_size); static void nsc_ircc_dma_xmit(struct nsc_ircc_cb *self, int iobase); static void nsc_ircc_change_speed(struct nsc_ircc_cb *self, __u32 baud); static void nsc_ircc_interrupt(int irq, void *dev_id, struct pt_regs *regs); static int nsc_ircc_is_receiving(struct nsc_ircc_cb *self); static int nsc_ircc_read_dongle_id (int iobase); static void nsc_ircc_init_dongle_interface (int iobase, int dongle_id); static int nsc_ircc_net_init(struct net_device *dev); static int nsc_ircc_net_open(struct net_device *dev); static int nsc_ircc_net_close(struct net_device *dev); static int nsc_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); static struct net_device_stats *nsc_ircc_net_get_stats(struct net_device *dev); static int nsc_ircc_pmproc(struct pm_dev *dev, pm_request_t rqst, void *data); /* * Function nsc_ircc_init () * * Initialize chip. Just try to find out how many chips we are dealing with * and where they are */ int __init nsc_ircc_init(void) { chipio_t info; nsc_chip_t *chip; int ret = -ENODEV; int cfg_base; int cfg, id; int reg; int i = 0; /* Probe for all the NSC chipsets we know about */ for (chip=chips; chip->name ; chip++) { IRDA_DEBUG(2, "%s(), Probing for %s ...\n", __FUNCTION__, chip->name); /* Try all config registers for this chip */ for (cfg=0; cfg<3; cfg++) { cfg_base = chip->cfg[cfg]; if (!cfg_base) continue; memset(&info, 0, sizeof(chipio_t)); info.cfg_base = cfg_base; info.fir_base = io[i]; info.dma = dma[i]; info.irq = irq[i]; /* Read index register */ reg = inb(cfg_base); if (reg == 0xff) { IRDA_DEBUG(2, "%s() no chip at 0x%03x\n", __FUNCTION__, cfg_base); continue; } /* Read chip identification register */ outb(chip->cid_index, cfg_base); id = inb(cfg_base+1); if ((id & chip->cid_mask) == chip->cid_value) { IRDA_DEBUG(2, "%s() Found %s chip, revision=%d\n", __FUNCTION__, chip->name, id & ~chip->cid_mask); /* * If the user supplies the base address, then * we init the chip, if not we probe the values * set by the BIOS */ if (io[i] < 0x2000) { chip->init(chip, &info); } else chip->probe(chip, &info); if (nsc_ircc_open(i, &info) == 0) ret = 0; i++; } else { IRDA_DEBUG(2, "%s(), Wrong chip id=0x%02x\n", __FUNCTION__, id); } } } return ret; } /* * Function nsc_ircc_cleanup () * * Close all configured chips * */ #ifdef MODULE static void nsc_ircc_cleanup(void) { int i; pm_unregister_all(nsc_ircc_pmproc); for (i=0; i < 4; i++) { if (dev_self[i]) nsc_ircc_close(dev_self[i]); } } #endif /* MODULE */ /* * Function nsc_ircc_open (iobase, irq) * * Open driver instance * */ static int nsc_ircc_open(int i, chipio_t *info) { struct net_device *dev; struct nsc_ircc_cb *self; struct pm_dev *pmdev; void *ret; int err; IRDA_DEBUG(2, "%s()\n", __FUNCTION__); MESSAGE("%s, Found chip at base=0x%03x\n", driver_name, info->cfg_base); if ((nsc_ircc_setup(info)) == -1) return -1; MESSAGE("%s, driver loaded (Dag Brattli)\n", driver_name); /* Allocate new instance of the driver */ self = kmalloc(sizeof(struct nsc_ircc_cb), GFP_KERNEL); if (self == NULL) { ERROR("%s(), can't allocate memory for " "control block!\n", __FUNCTION__); return -ENOMEM; } memset(self, 0, sizeof(struct nsc_ircc_cb)); spin_lock_init(&self->lock); /* Need to store self somewhere */ dev_self[i] = self; self->index = i; /* Initialize IO */ self->io.cfg_base = info->cfg_base; self->io.fir_base = info->fir_base; self->io.irq = info->irq; self->io.fir_ext = CHIP_IO_EXTENT; self->io.dma = info->dma; self->io.fifo_size = 32; /* Reserve the ioports that we need */ ret = request_region(self->io.fir_base, self->io.fir_ext, driver_name); if (!ret) { WARNING("%s(), can't get iobase of 0x%03x\n", __FUNCTION__, self->io.fir_base); dev_self[i] = NULL; kfree(self); return -ENODEV; } /* Initialize QoS for this device */ irda_init_max_qos_capabilies(&self->qos); /* The only value we must override it the baudrate */ self->qos.baud_rate.bits = IR_9600|IR_19200|IR_38400|IR_57600| IR_115200|IR_576000|IR_1152000 |(IR_4000000 << 8); self->qos.min_turn_time.bits = qos_mtt_bits; irda_qos_bits_to_value(&self->qos); self->flags = IFF_FIR|IFF_MIR|IFF_SIR|IFF_DMA|IFF_PIO|IFF_DONGLE; /* Max DMA buffer size needed = (data_size + 6) * (window_size) + 6; */ self->rx_buff.truesize = 14384; self->tx_buff.truesize = 14384; /* Allocate memory if needed */ self->rx_buff.head = (__u8 *) kmalloc(self->rx_buff.truesize, GFP_KERNEL|GFP_DMA); if (self->rx_buff.head == NULL) { kfree(self); return -ENOMEM; } memset(self->rx_buff.head, 0, self->rx_buff.truesize); self->tx_buff.head = (__u8 *) kmalloc(self->tx_buff.truesize, GFP_KERNEL|GFP_DMA); if (self->tx_buff.head == NULL) { kfree(self->rx_buff.head); kfree(self); return -ENOMEM; } memset(self->tx_buff.head, 0, self->tx_buff.truesize); 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; /* Reset Tx queue info */ self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0; self->tx_fifo.tail = self->tx_buff.head; if (!(dev = dev_alloc("irda%d", &err))) { ERROR("%s(), dev_alloc() failed!\n", __FUNCTION__); return -ENOMEM; } dev->priv = (void *) self; self->netdev = dev; /* Override the network functions we need to use */ dev->init = nsc_ircc_net_init; dev->hard_start_xmit = nsc_ircc_hard_xmit_sir; dev->open = nsc_ircc_net_open; dev->stop = nsc_ircc_net_close; dev->do_ioctl = nsc_ircc_net_ioctl; dev->get_stats = nsc_ircc_net_get_stats; rtnl_lock(); err = register_netdevice(dev); rtnl_unlock(); if (err) { ERROR("%s(), register_netdev() failed!\n", __FUNCTION__); return -1; } MESSAGE("IrDA: Registered device %s\n", dev->name); /* Check if user has supplied the dongle id and if it is in the range of available ids or not. */ if (!dongle_id) { dongle_id = nsc_ircc_read_dongle_id(self->io.fir_base); MESSAGE("%s, Found dongle: %s\n", driver_name, dongle_types[dongle_id]); } else { if (dongle_id < sizeof(dongle_types) / sizeof(dongle_types[0])) { MESSAGE("%s, Using dongle: %s\n", driver_name, dongle_types[dongle_id]); } else { MESSAGE("%s, dongle id %i out of range, start autodetect.\n", driver_name, dongle_id); dongle_id = nsc_ircc_read_dongle_id(self->io.fir_base); MESSAGE("%s, Found dongle: %s\n", driver_name, dongle_types[dongle_id]); } } self->io.dongle_id = dongle_id; nsc_ircc_init_dongle_interface(self->io.fir_base, dongle_id); pmdev = pm_register(PM_SYS_DEV, PM_SYS_IRDA, nsc_ircc_pmproc); if (pmdev) pmdev->data = self; return 0; } #ifdef MODULE /* * Function nsc_ircc_close (self) * * Close driver instance * */ static int nsc_ircc_close(struct nsc_ircc_cb *self) { int iobase; IRDA_DEBUG(4, "%s()\n", __FUNCTION__); ASSERT(self != NULL, return -1;); iobase = self->io.fir_base; /* Remove netdevice */ if (self->netdev) { rtnl_lock(); unregister_netdevice(self->netdev); rtnl_unlock(); } /* Release the PORT that this driver is using */ IRDA_DEBUG(4, "%s(), Releasing Region %03x\n", __FUNCTION__, self->io.fir_base); release_region(self->io.fir_base, self->io.fir_ext); if (self->tx_buff.head) kfree(self->tx_buff.head); if (self->rx_buff.head) kfree(self->rx_buff.head); dev_self[self->index] = NULL; kfree(self); return 0; } #endif /* MODULE */ /* * Function nsc_ircc_init_108 (iobase, cfg_base, irq, dma) * * Initialize the NSC '108 chip * */ static int nsc_ircc_init_108(nsc_chip_t *chip, chipio_t *info) { int cfg_base = info->cfg_base; __u8 temp=0; outb(2, cfg_base); /* Mode Control Register (MCTL) */ outb(0x00, cfg_base+1); /* Disable device */ /* Base Address and Interrupt Control Register (BAIC) */ outb(CFG_108_BAIC, cfg_base); switch (info->fir_base) { case 0x3e8: outb(0x14, cfg_base+1); break; case 0x2e8: outb(0x15, cfg_base+1); break; case 0x3f8: outb(0x16, cfg_base+1); break; case 0x2f8: outb(0x17, cfg_base+1); break; default: ERROR("%s(), invalid base_address", __FUNCTION__); } /* Control Signal Routing Register (CSRT) */ switch (info->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("%s(), invalid irq", __FUNCTION__); } outb(CFG_108_CSRT, cfg_base); switch (info->dma) { case 0: outb(0x08+temp, cfg_base+1); break; case 1: outb(0x10+temp, cfg_base+1); break; case 3: outb(0x18+temp, cfg_base+1); break; default: ERROR("%s(), invalid dma", __FUNCTION__); } outb(CFG_108_MCTL, cfg_base); /* Mode Control Register (MCTL) */ outb(0x03, cfg_base+1); /* Enable device */ return 0; } /* * Function nsc_ircc_probe_108 (chip, info) * * * */ static int nsc_ircc_probe_108(nsc_chip_t *chip, chipio_t *info) { int cfg_base = info->cfg_base; int reg; /* Read address and interrupt control register (BAIC) */ outb(CFG_108_BAIC, cfg_base); reg = inb(cfg_base+1); switch (reg & 0x03) { case 0: info->fir_base = 0x3e8; break; case 1: info->fir_base = 0x2e8; break; case 2: info->fir_base = 0x3f8; break; case 3: info->fir_base = 0x2f8; break; } info->sir_base = info->fir_base; IRDA_DEBUG(2, "%s(), probing fir_base=0x%03x\n", __FUNCTION__, info->fir_base); /* Read control signals routing register (CSRT) */ outb(CFG_108_CSRT, cfg_base); reg = inb(cfg_base+1); switch (reg & 0x07) { case 0: info->irq = -1; break; case 1: info->irq = 3; break; case 2: info->irq = 4; break; case 3: info->irq = 5; break; case 4: info->irq = 7; break; case 5: info->irq = 9; break; case 6: info->irq = 11; break; case 7: info->irq = 15; break; } IRDA_DEBUG(2, "%s(), probing irq=%d\n", __FUNCTION__, info->irq); /* Currently we only read Rx DMA but it will also be used for Tx */ switch ((reg >> 3) & 0x03) { case 0: info->dma = -1; break; case 1: info->dma = 0; break; case 2: info->dma = 1; break; case 3: info->dma = 3; break; } IRDA_DEBUG(2, "%s(), probing dma=%d\n", __FUNCTION__, info->dma); /* Read mode control register (MCTL) */ outb(CFG_108_MCTL, cfg_base); reg = inb(cfg_base+1); info->enabled = reg & 0x01; info->suspended = !((reg >> 1) & 0x01); return 0; } /* * Function nsc_ircc_init_338 (chip, info) * * Initialize the NSC '338 chip. Remember that the 87338 needs two * consecutive writes to the data registers while CPU interrupts are * disabled. The 97338 does not require this, but shouldn't be any * harm if we do it anyway. */ static int nsc_ircc_init_338(nsc_chip_t *chip, chipio_t *info) { /* No init yet */ return 0; } /* * Function nsc_ircc_probe_338 (chip, info) * * * */ static int nsc_ircc_probe_338(nsc_chip_t *chip, chipio_t *info) { int cfg_base = info->cfg_base; int reg, com = 0; int pnp; /* Read funtion enable register (FER) */ outb(CFG_338_FER, cfg_base); reg = inb(cfg_base+1); info->enabled = (reg >> 2) & 0x01; /* Check if we are in Legacy or PnP mode */ outb(CFG_338_PNP0, cfg_base); reg = inb(cfg_base+1); pnp = (reg >> 3) & 0x01; if (pnp) { IRDA_DEBUG(2, "(), Chip is in PnP mode\n"); outb(0x46, cfg_base); reg = (inb(cfg_base+1) & 0xfe) << 2; outb(0x47, cfg_base); reg |= ((inb(cfg_base+1) & 0xfc) << 8); info->fir_base = reg; } else { /* Read function address register (FAR) */ outb(CFG_338_FAR, cfg_base); reg = inb(cfg_base+1); switch ((reg >> 4) & 0x03) { case 0: info->fir_base = 0x3f8; break; case 1: info->fir_base = 0x2f8; break; case 2: com = 3; break; case 3: com = 4; break; } if (com) { switch ((reg >> 6) & 0x03) { case 0: if (com == 3) info->fir_base = 0x3e8; else info->fir_base = 0x2e8; break; case 1: if (com == 3) info->fir_base = 0x338; else info->fir_base = 0x238; break; case 2: if (com == 3) info->fir_base = 0x2e8; else info->fir_base = 0x2e0; break; case 3: if (com == 3) info->fir_base = 0x220; else info->fir_base = 0x228; break; } } } info->sir_base = info->fir_base; /* Read PnP register 1 (PNP1) */ outb(CFG_338_PNP1, cfg_base); reg = inb(cfg_base+1); info->irq = reg >> 4; /* Read PnP register 3 (PNP3) */ outb(CFG_338_PNP3, cfg_base); reg = inb(cfg_base+1); info->dma = (reg & 0x07) - 1; /* Read power and test register (PTR) */ outb(CFG_338_PTR, cfg_base); reg = inb(cfg_base+1); info->suspended = reg & 0x01; return 0; } /* * Function nsc_ircc_init_39x (chip, info) * * Now that we know it's a '39x (see probe below), we need to * configure it so we can use it. * * The NSC '338 chip is a Super I/O chip with a "bank" architecture, * the configuration of the different functionality (serial, parallel, * floppy...) are each in a different bank (Logical Device Number). * The base address, irq and dma configuration registers are common * to all functionalities (index 0x30 to 0x7F). * There is only one configuration register specific to the * serial port, CFG_39X_SPC. * JeanII * * Note : this code was written by Jan Frey */ static int nsc_ircc_init_39x(nsc_chip_t *chip, chipio_t *info) { int cfg_base = info->cfg_base; int enabled; /* User is shure about his config... accept it. */ IRDA_DEBUG(2, "%s(): nsc_ircc_init_39x (user settings): " "io=0x%04x, irq=%d, dma=%d\n", __FUNCTION__, info->fir_base, info->irq, info->dma); /* Access bank for SP2 */ outb(CFG_39X_LDN, cfg_base); outb(0x02, cfg_base+1); /* Configure SP2 */ /* We want to enable the device if not enabled */ outb(CFG_39X_ACT, cfg_base); enabled = inb(cfg_base+1) & 0x01; if (!enabled) { /* Enable the device */ outb(CFG_39X_SIOCF1, cfg_base); outb(0x01, cfg_base+1); /* May want to update info->enabled. Jean II */ } /* Enable UART bank switching (bit 7) ; Sets the chip to normal * power mode (wake up from sleep mode) (bit 1) */ outb(CFG_39X_SPC, cfg_base); outb(0x82, cfg_base+1); return 0; } /* * Function nsc_ircc_probe_39x (chip, info) * * Test if we really have a '39x chip at the given address * * Note : this code was written by Jan Frey */ static int nsc_ircc_probe_39x(nsc_chip_t *chip, chipio_t *info) { int cfg_base = info->cfg_base; int reg1, reg2, irq, irqt, dma1, dma2; int enabled, susp; IRDA_DEBUG(2, "%s(), nsc_ircc_probe_39x, base=%d\n", __FUNCTION__, cfg_base); /* This function should be executed with irq off to avoid * another driver messing with the Super I/O bank - Jean II */ /* Access bank for SP2 */ outb(CFG_39X_LDN, cfg_base); outb(0x02, cfg_base+1); /* Read infos about SP2 ; store in info struct */ outb(CFG_39X_BASEH, cfg_base); reg1 = inb(cfg_base+1); outb(CFG_39X_BASEL, cfg_base); reg2 = inb(cfg_base+1); info->fir_base = (reg1 << 8) | reg2; outb(CFG_39X_IRQNUM, cfg_base); irq = inb(cfg_base+1); outb(CFG_39X_IRQSEL, cfg_base); irqt = inb(cfg_base+1); info->irq = irq; outb(CFG_39X_DMA0, cfg_base); dma1 = inb(cfg_base+1); outb(CFG_39X_DMA1, cfg_base); dma2 = inb(cfg_base+1); info->dma = dma1 -1; outb(CFG_39X_ACT, cfg_base); info->enabled = enabled = inb(cfg_base+1) & 0x01; outb(CFG_39X_SPC, cfg_base); susp = 1 - ((inb(cfg_base+1) & 0x02) >> 1); IRDA_DEBUG(2, "%s(): io=0x%02x%02x, irq=%d (type %d), rxdma=%d, txdma=%d, enabled=%d (suspended=%d)\n", __FUNCTION__, reg1,reg2,irq,irqt,dma1,dma2,enabled,susp); /* Configure SP2 */ /* We want to enable the device if not enabled */ outb(CFG_39X_ACT, cfg_base); enabled = inb(cfg_base+1) & 0x01; if (!enabled) { /* Enable the device */ outb(CFG_39X_SIOCF1, cfg_base); outb(0x01, cfg_base+1); /* May want to update info->enabled. Jean II */ } /* Enable UART bank switching (bit 7) ; Sets the chip to normal * power mode (wake up from sleep mode) (bit 1) */ outb(CFG_39X_SPC, cfg_base); outb(0x82, cfg_base+1); return 0; } /* * Function nsc_ircc_setup (info) * * Returns non-negative on success. * */ static int nsc_ircc_setup(chipio_t *info) { int version; int iobase = info->fir_base; /* Read the Module ID */ switch_bank(iobase, BANK3); version = inb(iobase+MID); IRDA_DEBUG(2, "%s() Driver %s Found chip version %02x\n", __FUNCTION__, driver_name, version); /* Should be 0x2? */ if (0x20 != (version & 0xf0)) { ERROR("%s, Wrong chip version %02x\n", driver_name, version); return -1; } /* Switch to advanced mode */ switch_bank(iobase, BANK2); outb(ECR1_EXT_SL, iobase+ECR1); switch_bank(iobase, BANK0); /* 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); outb(0x03, iobase+LCR); /* 8 bit word length */ outb(MCR_SIR, iobase+MCR); /* Start at SIR-mode, also clears LSR*/ /* Set FIFO size to 32 */ switch_bank(iobase, BANK2); outb(EXCR2_RFSIZ|EXCR2_TFSIZ, iobase+EXCR2); /* IRCR2: FEND_MD is not set */ switch_bank(iobase, BANK5); outb(0x02, 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 to 1.6us */ outb(0x2a, iobase+4); /* Set beginning frag, and preamble length */ /* Enable receive interrupts */ switch_bank(iobase, BANK0); outb(IER_RXHDL_IE, iobase+IER); return 0; } /* * Function nsc_ircc_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 nsc_ircc_read_dongle_id (int iobase) { int dongle_id; __u8 bank; 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); outb(bank, iobase+BSR); return dongle_id; } /* * Function nsc_ircc_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 nsc_ircc_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 */ IRDA_DEBUG(0, "%s(), %s not defined by irda yet\n", __FUNCTION__, dongle_types[dongle_id]); break; case 0x02: /* same as */ case 0x03: /* Reserved */ IRDA_DEBUG(0, "%s(), %s not defined by irda yet\n", __FUNCTION__, dongle_types[dongle_id]); break; case 0x04: /* Sharp RY5HD01 */ break; case 0x05: /* Reserved, but this is what the Thinkpad reports */ IRDA_DEBUG(0, "%s(), %s not defined by irda yet\n", __FUNCTION__, dongle_types[dongle_id]); break; case 0x06: /* Single-ended serial interface */ IRDA_DEBUG(0, "%s(), %s not defined by irda yet\n", __FUNCTION__, dongle_types[dongle_id]); break; case 0x07: /* Consumer-IR only */ IRDA_DEBUG(0, "%s(), %s is not for IrDA mode\n", __FUNCTION__, dongle_types[dongle_id]); break; case 0x08: /* HP HSDL-2300, HP HSDL-3600/HSDL-3610 */ IRDA_DEBUG(0, "%s(), %s\n", __FUNCTION__, dongle_types[dongle_id]); break; case 0x09: /* IBM31T1100 or Temic TFDS6000/TFDS6500 */ outb(0x28, iobase+7); /* Set irsl[0-2] as output */ break; case 0x0A: /* same as */ case 0x0B: /* Reserved */ IRDA_DEBUG(0, "%s(), %s not defined by irda yet\n", __FUNCTION__, 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 */ IRDA_DEBUG(0, "%s(), %s\n", __FUNCTION__, dongle_types[dongle_id]); switch_bank(iobase, BANK0); outb(0x62, iobase+MCR); break; default: IRDA_DEBUG(0, "%s(), invalid dongle_id %#x", __FUNCTION__, 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 nsc_ircc_change_dongle_speed (iobase, speed, dongle_id) * * Change speed of the attach dongle * */ static void nsc_ircc_change_dongle_speed(int iobase, int speed, int dongle_id) { unsigned long flags; __u8 bank; /* 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 */ IRDA_DEBUG(0, "%s(), %s not defined by irda yet\n", __FUNCTION__, dongle_types[dongle_id]); break; case 0x02: /* same as */ case 0x03: /* Reserved */ IRDA_DEBUG(0, "%s(), %s not defined by irda yet\n", __FUNCTION__, dongle_types[dongle_id]); break; case 0x04: /* Sharp RY5HD01 */ break; case 0x05: /* Reserved */ IRDA_DEBUG(0, "%s(), %s not defined by irda yet\n", __FUNCTION__, dongle_types[dongle_id]); break; case 0x06: /* Single-ended serial interface */ IRDA_DEBUG(0, "%s(), %s not defined by irda yet\n", __FUNCTION__, dongle_types[dongle_id]); break; case 0x07: /* Consumer-IR only */ IRDA_DEBUG(0, "%s(), %s is not for IrDA mode\n", __FUNCTION__, dongle_types[dongle_id]); break; case 0x08: /* HP HSDL-2300, HP HSDL-3600/HSDL-3610 */ IRDA_DEBUG(0, "%s(), %s\n", __FUNCTION__, dongle_types[dongle_id]); outb(0x00, iobase+4); if (speed > 115200) outb(0x01, iobase+4); break; case 0x09: /* IBM31T1100 or Temic TFDS6000/TFDS6500 */ outb(0x01, iobase+4); if (speed == 4000000) { save_flags(flags); cli(); outb(0x81, iobase+4); outb(0x80, iobase+4); restore_flags(flags); } else outb(0x00, iobase+4); break; case 0x0A: /* same as */ case 0x0B: /* Reserved */ IRDA_DEBUG(0, "%s(), %s not defined by irda yet\n", __FUNCTION__, 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 */ IRDA_DEBUG(0, "%s(), %s is not for IrDA mode\n", __FUNCTION__, dongle_types[dongle_id]); switch_bank(iobase, BANK0); outb(0x62, iobase+MCR); break; default: IRDA_DEBUG(0, "%s(), invalid data_rate\n", __FUNCTION__); } /* Restore bank register */ outb(bank, iobase+BSR); } /* * Function nsc_ircc_change_speed (self, baud) * * Change the speed of the device * */ static void nsc_ircc_change_speed(struct nsc_ircc_cb *self, __u32 speed) { struct net_device *dev = self->netdev; __u8 mcr = MCR_SIR; int iobase; __u8 bank; IRDA_DEBUG(2, "%s(), speed=%d\n", __FUNCTION__, speed); ASSERT(self != NULL, return;); iobase = self->io.fir_base; /* Update accounting for new speed */ self->io.speed = 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 38400: 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; IRDA_DEBUG(0, "%s(), handling baud of 576000\n", __FUNCTION__); break; case 1152000: mcr = MCR_MIR; IRDA_DEBUG(0, "%s(), handling baud of 1152000\n", __FUNCTION__); break; case 4000000: mcr = MCR_FIR; IRDA_DEBUG(0, "%s(), handling baud of 4000000\n", __FUNCTION__); break; default: mcr = MCR_FIR; IRDA_DEBUG(0, "%s(), unknown baud rate of %d\n", __FUNCTION__, speed); break; } /* Set appropriate speed mode */ switch_bank(iobase, BANK0); outb(mcr | MCR_TX_DFR, iobase+MCR); /* Give some hits to the transceiver */ nsc_ircc_change_dongle_speed(iobase, speed, self->io.dongle_id); /* Set FIFO threshold to TX17, RX16 */ switch_bank(iobase, BANK0); outb(0x00, iobase+FCR); outb(FCR_FIFO_EN, iobase+FCR); 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); /* Set FIFO size to 32 */ switch_bank(iobase, BANK2); outb(EXCR2_RFSIZ|EXCR2_TFSIZ, iobase+EXCR2); /* Enable some interrupts so we can receive frames */ switch_bank(iobase, BANK0); if (speed > 115200) { /* Install FIR xmit handler */ dev->hard_start_xmit = nsc_ircc_hard_xmit_fir; outb(IER_SFIF_IE, iobase+IER); nsc_ircc_dma_receive(self); } else { /* Install SIR xmit handler */ dev->hard_start_xmit = nsc_ircc_hard_xmit_sir; outb(IER_RXHDL_IE, iobase+IER); } /* Restore BSR */ outb(bank, iobase+BSR); netif_wake_queue(dev); } /* * Function nsc_ircc_hard_xmit (skb, dev) * * Transmit the frame! * */ static int nsc_ircc_hard_xmit_sir(struct sk_buff *skb, struct net_device *dev) { struct nsc_ircc_cb *self; unsigned long flags; int iobase; __s32 speed; __u8 bank; self = (struct nsc_ircc_cb *) dev->priv; ASSERT(self != NULL, return 0;); iobase = self->io.fir_base; 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) { nsc_ircc_change_speed(self, speed); dev_kfree_skb(skb); return 0; } else self->new_speed = speed; } spin_lock_irqsave(&self->lock, flags); /* Save current bank */ bank = inb(iobase+BSR); self->tx_buff.data = self->tx_buff.head; self->tx_buff.len = async_wrap_skb(skb, self->tx_buff.data, self->tx_buff.truesize); self->stats.tx_bytes += self->tx_buff.len; /* Add interrupt on tx low level (will fire immediately) */ switch_bank(iobase, BANK0); outb(IER_TXLDL_IE, iobase+IER); /* Restore bank register */ outb(bank, iobase+BSR); spin_unlock_irqrestore(&self->lock, flags); dev_kfree_skb(skb); return 0; } static int nsc_ircc_hard_xmit_fir(struct sk_buff *skb, struct net_device *dev) { struct nsc_ircc_cb *self; unsigned long flags; int iobase; __s32 speed; __u8 bank; int mtt, diff; self = (struct nsc_ircc_cb *) dev->priv; iobase = self->io.fir_base; 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) { nsc_ircc_change_speed(self, speed); dev_kfree_skb(skb); return 0; } else self->new_speed = speed; } spin_lock_irqsave(&self->lock, flags); /* Save current bank */ bank = inb(iobase+BSR); /* Register and copy this frame to DMA memory */ self->tx_fifo.queue[self->tx_fifo.free].start = self->tx_fifo.tail; self->tx_fifo.queue[self->tx_fifo.free].len = skb->len; self->tx_fifo.tail += skb->len; self->stats.tx_bytes += skb->len; memcpy(self->tx_fifo.queue[self->tx_fifo.free].start, skb->data, skb->len); self->tx_fifo.len++; self->tx_fifo.free++; /* Start transmit only if there is currently no transmit going on */ if (self->tx_fifo.len == 1) { /* Check if we must wait the min turn time or not */ mtt = irda_get_mtt(skb); if (mtt) { /* Check how much time we have used already */ do_gettimeofday(&self->now); diff = self->now.tv_usec - self->stamp.tv_usec; if (diff < 0) diff += 1000000; /* Check if the mtt is larger than the time we have * already used by all the protocol processing */ if (mtt > diff) { mtt -= diff; /* * Use timer if delay larger than 125 us, and * use udelay for smaller values which should * be acceptable */ if (mtt > 125) { /* Adjust for timer resolution */ mtt = mtt / 125; /* 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); self->io.direction = IO_XMIT; /* Enable timer interrupt */ switch_bank(iobase, BANK0); outb(IER_TMR_IE, iobase+IER); /* Timer will take care of the rest */ goto out; } else udelay(mtt); } } /* Enable DMA interrupt */ switch_bank(iobase, BANK0); outb(IER_DMA_IE, iobase+IER); /* Transmit frame */ nsc_ircc_dma_xmit(self, iobase); } out: /* Not busy transmitting anymore if window is not full */ if (self->tx_fifo.free < MAX_TX_WINDOW) netif_wake_queue(self->netdev); /* Restore bank register */ outb(bank, iobase+BSR); spin_unlock_irqrestore(&self->lock, flags); dev_kfree_skb(skb); return 0; } /* * Function nsc_ircc_dma_xmit (self, iobase) * * Transmit data using DMA * */ static void nsc_ircc_dma_xmit(struct nsc_ircc_cb *self, int iobase) { int bsr; /* Save current bank */ bsr = inb(iobase+BSR); /* Disable DMA */ switch_bank(iobase, BANK0); outb(inb(iobase+MCR) & ~MCR_DMA_EN, iobase+MCR); self->io.direction = IO_XMIT; /* Choose transmit DMA channel */ switch_bank(iobase, BANK2); outb(ECR1_DMASWP|ECR1_DMANF|ECR1_EXT_SL, iobase+ECR1); setup_dma(self->io.dma, self->tx_fifo.queue[self->tx_fifo.ptr].start, self->tx_fifo.queue[self->tx_fifo.ptr].len, DMA_TX_MODE); /* Enable DMA and SIR interaction pulse */ switch_bank(iobase, BANK0); outb(inb(iobase+MCR)|MCR_TX_DFR|MCR_DMA_EN|MCR_IR_PLS, iobase+MCR); /* Restore bank register */ outb(bsr, iobase+BSR); } /* * Function nsc_ircc_pio_xmit (self, iobase) * * Transmit data using PIO. Returns the number of bytes that actually * got transferred * */ static int nsc_ircc_pio_write(int iobase, __u8 *buf, int len, int fifo_size) { int actual = 0; __u8 bank; IRDA_DEBUG(4, "%s()\n", __FUNCTION__); /* Save current bank */ bank = inb(iobase+BSR); switch_bank(iobase, BANK0); if (!(inb_p(iobase+LSR) & LSR_TXEMP)) { IRDA_DEBUG(4, "%s(), warning, FIFO not empty yet!\n", __FUNCTION__); /* FIFO may still be filled to the Tx interrupt threshold */ fifo_size -= 17; } /* Fill FIFO with current frame */ while ((fifo_size-- > 0) && (actual < len)) { /* Transmit next byte */ outb(buf[actual++], iobase+TXD); } IRDA_DEBUG(4, "%s(), fifo_size %d ; %d sent of %d\n", __FUNCTION__, fifo_size, actual, len); /* Restore bank */ outb(bank, iobase+BSR); return actual; } /* * Function nsc_ircc_dma_xmit_complete (self) * * The transfer of a frame in finished. This function will only be called * by the interrupt handler * */ static int nsc_ircc_dma_xmit_complete(struct nsc_ircc_cb *self) { int iobase; __u8 bank; int ret = TRUE; IRDA_DEBUG(2, "%s()\n", __FUNCTION__); iobase = self->io.fir_base; /* 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) { self->stats.tx_errors++; self->stats.tx_fifo_errors++; /* Clear bit, by writing 1 into it */ outb(ASCR_TXUR, iobase+ASCR); } else { self->stats.tx_packets++; } /* Check if we need to change the speed */ if (self->new_speed) { nsc_ircc_change_speed(self, self->new_speed); self->new_speed = 0; } /* Finished with this frame, so prepare for next */ self->tx_fifo.ptr++; self->tx_fifo.len--; /* Any frames to be sent back-to-back? */ if (self->tx_fifo.len) { nsc_ircc_dma_xmit(self, iobase); /* Not finished yet! */ ret = FALSE; } else { /* Reset Tx FIFO info */ self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0; self->tx_fifo.tail = self->tx_buff.head; } /* Make sure we have room for more frames */ if (self->tx_fifo.free < MAX_TX_WINDOW) { /* Not busy transmitting anymore */ /* Tell the network layer, that we can accept more frames */ netif_wake_queue(self->netdev); } /* Restore bank */ outb(bank, iobase+BSR); return ret; } /* * Function nsc_ircc_dma_receive (self) * * Get ready for receiving a frame. The device will initiate a DMA * if it starts to receive a frame. * */ static int nsc_ircc_dma_receive(struct nsc_ircc_cb *self) { int iobase; __u8 bsr; iobase = self->io.fir_base; /* Reset Tx FIFO info */ self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0; self->tx_fifo.tail = self->tx_buff.head; /* Save current bank */ bsr = inb(iobase+BSR); /* Disable DMA */ switch_bank(iobase, BANK0); outb(inb(iobase+MCR) & ~MCR_DMA_EN, iobase+MCR); /* Choose DMA Rx, DMA Fairness, and Advanced mode */ switch_bank(iobase, BANK2); outb(ECR1_DMANF|ECR1_EXT_SL, iobase+ECR1); self->io.direction = IO_RECV; self->rx_buff.data = self->rx_buff.head; /* Reset Rx FIFO. This will also flush the ST_FIFO */ switch_bank(iobase, BANK0); outb(FCR_RXSR|FCR_FIFO_EN, iobase+FCR); self->st_fifo.len = self->st_fifo.pending_bytes = 0; self->st_fifo.tail = self->st_fifo.head = 0; setup_dma(self->io.dma, self->rx_buff.data, self->rx_buff.truesize, DMA_RX_MODE); /* Enable DMA */ switch_bank(iobase, BANK0); outb(inb(iobase+MCR)|MCR_DMA_EN, iobase+MCR); /* Restore bank register */ outb(bsr, iobase+BSR); return 0; } /* * Function nsc_ircc_dma_receive_complete (self) * * Finished with receiving frames * * */ static int nsc_ircc_dma_receive_complete(struct nsc_ircc_cb *self, int iobase) { struct st_fifo *st_fifo; struct sk_buff *skb; __u8 status; __u8 bank; int len; st_fifo = &self->st_fifo; /* Save current bank */ bank = inb(iobase+BSR); /* Read all entries in status FIFO */ switch_bank(iobase, BANK5); while ((status = inb(iobase+FRM_ST)) & FRM_ST_VLD) { /* We must empty the status FIFO no matter what */ len = inb(iobase+RFLFL) | ((inb(iobase+RFLFH) & 0x1f) << 8); if (st_fifo->tail >= MAX_RX_WINDOW) { IRDA_DEBUG(0, "%s(), window is full!\n", __FUNCTION__); continue; } st_fifo->entries[st_fifo->tail].status = status; st_fifo->entries[st_fifo->tail].len = len; st_fifo->pending_bytes += len; st_fifo->tail++; st_fifo->len++; } /* Try to process all entries in status FIFO */ while (st_fifo->len > 0) { /* Get first entry */ status = st_fifo->entries[st_fifo->head].status; len = st_fifo->entries[st_fifo->head].len; st_fifo->pending_bytes -= 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 */ self->stats.rx_errors += len; } else { /* Skip frame */ self->stats.rx_errors++; self->rx_buff.data += len; if (status & FRM_ST_MAX_LEN) self->stats.rx_length_errors++; if (status & FRM_ST_PHY_ERR) self->stats.rx_frame_errors++; if (status & FRM_ST_BAD_CRC) self->stats.rx_crc_errors++; } /* The errors below can be reported in both cases */ if (status & FRM_ST_OVR1) self->stats.rx_fifo_errors++; if (status & FRM_ST_OVR2) self->stats.rx_fifo_errors++; } else { /* * First we must make sure that the frame we * want to deliver is all in main memory. If we * cannot tell, then we check if the Rx FIFO is * empty. If not then we will have to take a nap * and try again later. */ if (st_fifo->pending_bytes < self->io.fifo_size) { switch_bank(iobase, BANK0); if (inb(iobase+LSR) & LSR_RXDA) { /* Put this entry back in fifo */ st_fifo->head--; st_fifo->len++; st_fifo->pending_bytes += len; st_fifo->entries[st_fifo->head].status = status; st_fifo->entries[st_fifo->head].len = len; /* * DMA not finished yet, so try again * later, set timer value, resolution * 125 us */ switch_bank(iobase, BANK4); outb(0x02, iobase+TMRL); /* x 125 us */ outb(0x00, iobase+TMRH); /* Start timer */ outb(IRCR1_TMR_EN, iobase+IRCR1); /* Restore bank register */ outb(bank, iobase+BSR); return FALSE; /* I'll be back! */ } } /* * Remember the time we received this frame, so we can * reduce the min turn time a bit since we will know * how much time we have used for protocol processing */ do_gettimeofday(&self->stamp); skb = dev_alloc_skb(len+1); if (skb == NULL) { WARNING("%s(), memory squeeze, " "dropping frame.\n", __FUNCTION__); self->stats.rx_dropped++; /* Restore bank register */ outb(bank, iobase+BSR); return FALSE; } /* Make sure IP header gets aligned */ skb_reserve(skb, 1); /* Copy frame without CRC */ if (self->io.speed < 4000000) { skb_put(skb, len-2); memcpy(skb->data, self->rx_buff.data, len-2); } else { skb_put(skb, len-4); memcpy(skb->data, self->rx_buff.data, len-4); } /* Move to next frame */ self->rx_buff.data += len; self->stats.rx_bytes += len; self->stats.rx_packets++; skb->dev = self->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 nsc_ircc_pio_receive (self) * * Receive all data in receiver FIFO * */ static void nsc_ircc_pio_receive(struct nsc_ircc_cb *self) { __u8 byte; int iobase; iobase = self->io.fir_base; /* Receive all characters in Rx FIFO */ do { byte = inb(iobase+RXD); async_unwrap_char(self->netdev, &self->stats, &self->rx_buff, byte); } while (inb(iobase+LSR) & LSR_RXDA); /* Data available */ } /* * Function nsc_ircc_sir_interrupt (self, eir) * * Handle SIR interrupt * */ static void nsc_ircc_sir_interrupt(struct nsc_ircc_cb *self, int eir) { int actual; /* Check if transmit FIFO is low on data */ if (eir & EIR_TXLDL_EV) { /* Write data left in transmit buffer */ actual = nsc_ircc_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) self->ier = IER_TXLDL_IE; else { self->stats.tx_packets++; netif_wake_queue(self->netdev); self->ier = IER_TXEMP_IE; } } /* Check if transmission has completed */ if (eir & EIR_TXEMP_EV) { /* Check if we need to change the speed? */ if (self->new_speed) { IRDA_DEBUG(2, "%s(), Changing speed!\n", __FUNCTION__); nsc_ircc_change_speed(self, self->new_speed); self->new_speed = 0; /* Check if we are going to FIR */ if (self->io.speed > 115200) { /* Should wait for status FIFO interrupt */ self->ier = IER_SFIF_IE; /* No need to do anymore SIR stuff */ return; } } /* Turn around and get ready to receive some data */ self->io.direction = IO_RECV; self->ier = IER_RXHDL_IE; } /* Rx FIFO threshold or timeout */ if (eir & EIR_RXHDL_EV) { nsc_ircc_pio_receive(self); /* Keep receiving */ self->ier = IER_RXHDL_IE; } } /* * Function nsc_ircc_fir_interrupt (self, eir) * * Handle MIR/FIR interrupt * */ static void nsc_ircc_fir_interrupt(struct nsc_ircc_cb *self, int iobase, int eir) { __u8 bank; bank = inb(iobase+BSR); /* Status FIFO event*/ if (eir & EIR_SFIF_EV) { /* Check if DMA has finished */ if (nsc_ircc_dma_receive_complete(self, iobase)) { /* Wait for next status FIFO interrupt */ self->ier = IER_SFIF_IE; } else { self->ier = IER_SFIF_IE | IER_TMR_IE; } } else if (eir & EIR_TMR_EV) { /* Timer finished */ /* 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 (self->io.direction == IO_XMIT) { nsc_ircc_dma_xmit(self, iobase); /* Interrupt on DMA */ self->ier = IER_DMA_IE; } else { /* Check (again) if DMA has finished */ if (nsc_ircc_dma_receive_complete(self, iobase)) { self->ier = IER_SFIF_IE; } else { self->ier = IER_SFIF_IE | IER_TMR_IE; } } } else if (eir & EIR_DMA_EV) { /* Finished with all transmissions? */ if (nsc_ircc_dma_xmit_complete(self)) { /* Check if there are more frames to be transmitted */ if (irda_device_txqueue_empty(self->netdev)) { /* Prepare for receive */ nsc_ircc_dma_receive(self); self->ier = IER_SFIF_IE; } } else { /* Not finished yet, so interrupt on DMA again */ self->ier = IER_DMA_IE; } } outb(bank, iobase+BSR); } /* * Function nsc_ircc_interrupt (irq, dev_id, regs) * * An interrupt from the chip has arrived. Time to do some work * */ static void nsc_ircc_interrupt(int irq, void *dev_id, struct pt_regs *regs) { struct net_device *dev = (struct net_device *) dev_id; struct nsc_ircc_cb *self; __u8 bsr, eir; int iobase; if (!dev) { WARNING("%s: irq %d for unknown device.\n", driver_name, irq); return; } self = (struct nsc_ircc_cb *) dev->priv; spin_lock(&self->lock); iobase = self->io.fir_base; bsr = inb(iobase+BSR); /* Save current bank */ switch_bank(iobase, BANK0); self->ier = inb(iobase+IER); eir = inb(iobase+EIR) & self->ier; /* Mask out the interesting ones */ outb(0, iobase+IER); /* Disable interrupts */ if (eir) { /* Dispatch interrupt handler for the current speed */ if (self->io.speed > 115200) nsc_ircc_fir_interrupt(self, iobase, eir); else nsc_ircc_sir_interrupt(self, eir); } outb(self->ier, iobase+IER); /* Restore interrupts */ outb(bsr, iobase+BSR); /* Restore bank register */ spin_unlock(&self->lock); } /* * Function nsc_ircc_is_receiving (self) * * Return TRUE is we are currently receiving a frame * */ static int nsc_ircc_is_receiving(struct nsc_ircc_cb *self) { unsigned long flags; int status = FALSE; int iobase; __u8 bank; ASSERT(self != NULL, return FALSE;); spin_lock_irqsave(&self->lock, flags); if (self->io.speed > 115200) { iobase = self->io.fir_base; /* 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 = (self->rx_buff.state != OUTSIDE_FRAME); spin_unlock_irqrestore(&self->lock, flags); return status; } /* * Function nsc_ircc_net_init (dev) * * Initialize network device * */ static int nsc_ircc_net_init(struct net_device *dev) { IRDA_DEBUG(4, "%s()\n", __FUNCTION__); /* Setup to be a normal IrDA network device driver */ irda_device_setup(dev); /* Insert overrides below this line! */ return 0; } /* * Function nsc_ircc_net_open (dev) * * Start the device * */ static int nsc_ircc_net_open(struct net_device *dev) { struct nsc_ircc_cb *self; int iobase; char hwname[32]; __u8 bank; IRDA_DEBUG(4, "%s()\n", __FUNCTION__); ASSERT(dev != NULL, return -1;); self = (struct nsc_ircc_cb *) dev->priv; ASSERT(self != NULL, return 0;); iobase = self->io.fir_base; if (request_irq(self->io.irq, nsc_ircc_interrupt, 0, dev->name, dev)) { WARNING("%s, unable to allocate irq=%d\n", driver_name, self->io.irq); return -EAGAIN; } /* * Always allocate the DMA channel after the IRQ, and clean up on * failure. */ if (request_dma(self->io.dma, dev->name)) { WARNING("%s, unable to allocate dma=%d\n", driver_name, self->io.dma); free_irq(self->io.irq, dev); return -EAGAIN; } /* 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); /* Ready to play! */ netif_start_queue(dev); /* Give self a hardware name */ sprintf(hwname, "NSC-FIR @ 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); MOD_INC_USE_COUNT; return 0; } /* * Function nsc_ircc_net_close (dev) * * Stop the device * */ static int nsc_ircc_net_close(struct net_device *dev) { struct nsc_ircc_cb *self; int iobase; __u8 bank; IRDA_DEBUG(4, "%s()\n", __FUNCTION__); ASSERT(dev != NULL, return -1;); self = (struct nsc_ircc_cb *) dev->priv; ASSERT(self != NULL, return 0;); /* Stop device */ netif_stop_queue(dev); /* Stop and remove instance of IrLAP */ if (self->irlap) irlap_close(self->irlap); self->irlap = NULL; iobase = self->io.fir_base; disable_dma(self->io.dma); /* Save current bank */ bank = inb(iobase+BSR); /* Disable interrupts */ switch_bank(iobase, BANK0); outb(0, iobase+IER); free_irq(self->io.irq, dev); free_dma(self->io.dma); /* Restore bank register */ outb(bank, iobase+BSR); MOD_DEC_USE_COUNT; return 0; } /* * Function nsc_ircc_net_ioctl (dev, rq, cmd) * * Process IOCTL commands for this device * */ static int nsc_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) { struct if_irda_req *irq = (struct if_irda_req *) rq; struct nsc_ircc_cb *self; unsigned long flags; int ret = 0; ASSERT(dev != NULL, return -1;); self = dev->priv; ASSERT(self != NULL, return -1;); IRDA_DEBUG(2, "%s(), %s, (cmd=0x%X)\n", __FUNCTION__, dev->name, cmd); /* Disable interrupts & save flags */ save_flags(flags); cli(); switch (cmd) { case SIOCSBANDWIDTH: /* Set bandwidth */ if (!capable(CAP_NET_ADMIN)) { ret = -EPERM; goto out; } nsc_ircc_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 = nsc_ircc_is_receiving(self); break; default: ret = -EOPNOTSUPP; } out: restore_flags(flags); return ret; } static struct net_device_stats *nsc_ircc_net_get_stats(struct net_device *dev) { struct nsc_ircc_cb *self = (struct nsc_ircc_cb *) dev->priv; return &self->stats; } static void nsc_ircc_suspend(struct nsc_ircc_cb *self) { MESSAGE("%s, Suspending\n", driver_name); if (self->io.suspended) return; nsc_ircc_net_close(self->netdev); self->io.suspended = 1; } static void nsc_ircc_wakeup(struct nsc_ircc_cb *self) { if (!self->io.suspended) return; nsc_ircc_setup(&self->io); nsc_ircc_net_open(self->netdev); MESSAGE("%s, Waking up\n", driver_name); self->io.suspended = 0; } static int nsc_ircc_pmproc(struct pm_dev *dev, pm_request_t rqst, void *data) { struct nsc_ircc_cb *self = (struct nsc_ircc_cb*) dev->data; if (self) { switch (rqst) { case PM_SUSPEND: nsc_ircc_suspend(self); break; case PM_RESUME: nsc_ircc_wakeup(self); break; } } return 0; } #ifdef MODULE MODULE_AUTHOR("Dag Brattli "); MODULE_DESCRIPTION("NSC IrDA Device Driver"); MODULE_LICENSE("GPL"); MODULE_PARM(qos_mtt_bits, "i"); MODULE_PARM_DESC(qos_mtt_bits, "Minimum Turn Time"); MODULE_PARM(io, "1-4i"); MODULE_PARM_DESC(io, "Base I/O addresses"); MODULE_PARM(irq, "1-4i"); MODULE_PARM_DESC(irq, "IRQ lines"); MODULE_PARM(dma, "1-4i"); MODULE_PARM_DESC(dma, "DMA channels"); MODULE_PARM(dongle_id, "i"); MODULE_PARM_DESC(dongle_id, "Type-id of used dongle"); int init_module(void) { return nsc_ircc_init(); } void cleanup_module(void) { nsc_ircc_cleanup(); } #endif /* MODULE */