patch-2.2.15 linux/drivers/net/irda/nsc_fir.c
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- Lines: 1857
- Date:
Fri Apr 21 12:46:17 2000
- Orig file:
v2.2.14/drivers/net/irda/nsc_fir.c
- Orig date:
Thu Jan 1 01:00:00 1970
diff -u --new-file --recursive --exclude-from ../../exclude v2.2.14/drivers/net/irda/nsc_fir.c linux/drivers/net/irda/nsc_fir.c
@@ -0,0 +1,1856 @@
+/*********************************************************************
+ *
+ * Filename: nsc_fir.c
+ * Version: 1.0
+ * Description: Driver for the NSC PC'108 and PC'338 IrDA chipsets
+ * Status: Stable.
+ * Author: Dag Brattli <dagb@cs.uit.no>
+ * Created at: Sat Nov 7 21:43:15 1998
+ * Modified at: Tue Jan 11 10:17:04 2000
+ * Modified by: Dag Brattli <dagb@cs.uit.no>
+ *
+ * Copyright (c) 1998-2000 Dag Brattli <dagb@cs.uit.no>
+ * Copyright (c) 1998 Lichen Wang, <lwang@actisys.com>
+ * 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 <linux/module.h>
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/skbuff.h>
+#include <linux/netdevice.h>
+#include <linux/ioport.h>
+#include <linux/delay.h>
+#include <linux/malloc.h>
+#include <linux/init.h>
+#include <linux/rtnetlink.h>
+
+#include <asm/io.h>
+#include <asm/dma.h>
+#include <asm/byteorder.h>
+
+#ifdef CONFIG_APM
+#include <linux/apm_bios.h>
+#endif
+
+#include <net/irda/wrapper.h>
+#include <net/irda/irda.h>
+#include <net/irda/irmod.h>
+#include <net/irda/irlap_frame.h>
+#include <net/irda/irda_device.h>
+
+#include <net/irda/nsc_ircc.h>
+
+#define CHIP_IO_EXTENT 8
+#define BROKEN_DONGLE_ID
+
+/*
+ * Define if you have multiple NSC IrDA controllers in your machine. Not
+ * enabled by default since some single chips detects at multiple addresses
+ */
+#undef CONFIG_NSC_IRCC_MULTIPLE
+
+static char *driver_name = "nsc_ircc";
+
+/* Module parameters */
+static int qos_mtt_bits = 0x07; /* 1 ms or more */
+static int dongle_id = 0;
+
+static unsigned int io[] = { 0x2f8, 0x2f8, 0x2f8, 0x2f8, 0x2f8 };
+static unsigned int io2[] = { 0x150, 0x398, 0xea, 0x15c, 0x2e };
+static unsigned int irq[] = { 3, 3, 3, 3, 3 };
+static unsigned int dma[] = { 0, 0, 0, 0, 3 };
+
+static struct nsc_ircc_cb *dev_self[] = { NULL, 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, unsigned int iobase, unsigned int board_addr,
+ unsigned int irq, unsigned int dma);
+#ifdef MODULE
+static int nsc_ircc_close(struct nsc_ircc_cb *self);
+#endif /* MODULE */
+static int nsc_ircc_probe(int iobase, int board_addr, int irq, int dma);
+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 device *dev);
+static int nsc_ircc_hard_xmit_fir(struct sk_buff *skb, struct 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 device *dev);
+static int nsc_ircc_net_open(struct device *dev);
+static int nsc_ircc_net_close(struct device *dev);
+static int nsc_ircc_net_ioctl(struct device *dev, struct ifreq *rq, int cmd);
+static struct net_device_stats *nsc_ircc_net_get_stats(struct device *dev);
+#ifdef CONFIG_APM
+static int nsc_ircc_apmproc(apm_event_t event);
+#endif /* CONFIG_APM */
+/*
+ * 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)
+{
+ int ret = -ENODEV;
+ int ioaddr;
+ int i;
+
+#ifdef CONFIG_APM
+ apm_register_callback(nsc_ircc_apmproc);
+#endif /* CONFIG_APM */
+
+ for (i=0; (io[i] < 2000) && (i < 5); i++) {
+ ioaddr = io[i];
+ if (check_region(ioaddr, CHIP_IO_EXTENT) < 0)
+ continue;
+ if (nsc_ircc_open(i, io[i], io2[i], irq[i], dma[i]) == 0)
+ {
+#ifdef CONFIG_NSC_IRCC_MULTIPLE
+ ret = 0;
+#else
+ return 0;
+#endif
+ }
+ }
+ return ret;
+}
+
+/*
+ * Function nsc_ircc_cleanup ()
+ *
+ * Close all configured chips
+ *
+ */
+#ifdef MODULE
+static void nsc_ircc_cleanup(void)
+{
+ int i;
+
+ IRDA_DEBUG(4, __FUNCTION__ "()\n");
+
+#ifdef CONFIG_APM
+ apm_unregister_callback(nsc_ircc_apmproc);
+#endif /* CONFIG_APM */
+
+
+ for (i=0; i < 5; 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, unsigned int iobase, unsigned int board_addr,
+ unsigned int irq, unsigned int dma)
+{
+ struct device *dev;
+ struct nsc_ircc_cb *self;
+ int dongle_id;
+ int ret;
+ int err;
+
+ IRDA_DEBUG(2, __FUNCTION__ "()\n");
+
+ if ((dongle_id = nsc_ircc_probe(iobase, board_addr, irq, dma)) == -1)
+ return -1;
+
+ /*
+ * Allocate new instance of the driver
+ */
+ self = kmalloc(sizeof(struct nsc_ircc_cb), GFP_KERNEL);
+ if (self == NULL) {
+ ERROR(__FUNCTION__ "(), can't allocate memory for "
+ "control block!\n");
+ return -ENOMEM;
+ }
+ memset(self, 0, sizeof(struct nsc_ircc_cb));
+ spin_lock_init(&self->lock);
+
+ /* Need to store self somewhere */
+ dev_self[i] = self;
+
+ /* Initialize IO */
+ self->io.iobase = iobase;
+ self->io.irq = irq;
+ self->io.io_ext = CHIP_IO_EXTENT;
+ self->io.dma = dma;
+ self->io.fifo_size = 32;
+
+ /* Lock the port that we need */
+ ret = check_region(self->io.iobase, self->io.io_ext);
+ if (ret < 0) {
+ IRDA_DEBUG(0, __FUNCTION__ "(), can't get iobase of 0x%03x\n",
+ self->io.iobase);
+ /* nsc_ircc_cleanup(self->self); */
+ return -ENODEV;
+ }
+ request_region(self->io.iobase, self->io.io_ext, driver_name);
+
+ /* 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)
+ 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);
+ 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(__FUNCTION__ "(), dev_alloc() failed!\n");
+ return -ENOMEM;
+ }
+ /* dev_alloc doesn't clear the struct, so lets do a little hack */
+ memset(((__u8*)dev)+sizeof(char*),0,sizeof(struct device)-sizeof(char*));
+
+ 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(__FUNCTION__ "(), register_netdev() failed!\n");
+ return -1;
+ }
+
+ MESSAGE("IrDA: Registered device %s\n", dev->name);
+
+ self->io.dongle_id = dongle_id;
+ nsc_ircc_init_dongle_interface(iobase, dongle_id);
+
+ 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, __FUNCTION__ "()\n");
+
+ ASSERT(self != NULL, return -1;);
+
+ iobase = self->io.iobase;
+
+ /* Remove netdevice */
+ if (self->netdev) {
+ rtnl_lock();
+ unregister_netdevice(self->netdev);
+ rtnl_unlock();
+ /* Must free the old-style 2.2.x device */
+ kfree(self->netdev);
+ }
+
+ /* Release the PORT that this driver is using */
+ IRDA_DEBUG(4, __FUNCTION__ "(), Releasing Region %03x\n",
+ self->io.iobase);
+ release_region(self->io.iobase, self->io.io_ext);
+
+ if (self->tx_buff.head)
+ kfree(self->tx_buff.head);
+
+ if (self->rx_buff.head)
+ kfree(self->rx_buff.head);
+
+ kfree(self);
+
+ return 0;
+}
+#endif /* MODULE */
+
+/*
+ * Function nsc_ircc_init_807 (iobase, board_addr, irq, dma)
+ *
+ * Initialize the NSC '108 chip
+ *
+ */
+static void nsc_ircc_init_807(int iobase, int board_addr, int irq, int dma)
+{
+ __u8 temp=0;
+
+ outb(2, board_addr); /* Mode Control Register (MCTL) */
+ outb(0x00, board_addr+1); /* Disable device */
+
+ /* 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: ERROR(__FUNCTION__ "(), invalid dma");
+ }
+
+ outb(2, board_addr); /* Mode Control Register (MCTL) */
+ outb(0x03, board_addr+1); /* Enable device */
+}
+
+/*
+ * Function nsc_ircc_init_338 (iobase, board_addr, irq, dma)
+ *
+ * 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 void nsc_ircc_init_338(int iobase, int board_addr, int irq, int dma)
+{
+ /* No init yet */
+}
+
+static int nsc_ircc_find_chip(int board_addr)
+{
+ __u8 index, id;
+
+ IRDA_DEBUG(4, __FUNCTION__ "()\n");
+
+ /* Read index register */
+ index = inb(board_addr);
+ if (index == 0xff) {
+ IRDA_DEBUG(0, __FUNCTION__ "(), no chip at 0x%03x\n",
+ board_addr);
+ return -1;
+ }
+
+ /* Read chip identification register (SID) for the PC97338 */
+ outb(8, board_addr);
+ id = inb(board_addr+1);
+ if ((id & 0xf0) == PC97338) {
+ MESSAGE("%s, Found NSC PC97338 chip, revision=%d\n",
+ driver_name, id & 0x0f);
+ return PC97338;
+ }
+
+ /* Read device identification (DID) for the PC87108 */
+ outb(5, board_addr);
+ id = inb(board_addr+1);
+ if ((id & 0xf0) == PC87108) {
+ MESSAGE("%s, Found NSC PC87108 chip, revision=%d\n",
+ driver_name, id & 0x0f);
+ return PC87108;
+ }
+
+ return -1;
+}
+
+/*
+ * Function nsc_ircc_probe (iobase, board_addr, irq, dma)
+ *
+ * Returns non-negative on success.
+ *
+ */
+static int nsc_ircc_probe(int iobase, int board_addr, int irq, int dma)
+{
+ int version;
+ __u8 chip;
+
+ chip = nsc_ircc_find_chip(board_addr);
+ switch (chip) {
+ case PC87108:
+ nsc_ircc_init_807(iobase, board_addr, irq, dma);
+ break;
+ case PC97338:
+ nsc_ircc_init_338(iobase, board_addr, irq, dma);
+ break;
+ default:
+ /* Found no chip */
+ return -1;
+ }
+
+ /* Read the Module ID */
+ switch_bank(iobase, BANK3);
+ version = inb(iobase+MID);
+
+ /* Should be 0x2? */
+ if (0x20 != (version & 0xf0)) {
+ ERROR("%s, Wrong chip version %02x\n", driver_name, version);
+ return -1;
+ }
+ MESSAGE("%s, Found chip at base=0x%03x\n", driver_name, board_addr);
+
+ /* Switch to advanced mode */
+ switch_bank(iobase, BANK2);
+ outb(ECR1_EXT_SL, iobase+ECR1);
+ switch_bank(iobase, BANK0);
+
+ /* Check if user has supplied the dongle id or not */
+ if (!dongle_id) {
+ dongle_id = nsc_ircc_read_dongle_id(iobase);
+
+ MESSAGE("%s, Found dongle: %s\n", driver_name,
+ dongle_types[dongle_id]);
+ } else {
+ MESSAGE("%s, Using dongle: %s\n", driver_name,
+ 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 */
+
+ MESSAGE("%s, driver loaded (Dag Brattli)\n", driver_name);
+
+ /* Enable receive interrupts */
+ switch_bank(iobase, BANK0);
+ outb(IER_RXHDL_IE, iobase+IER);
+
+ return dongle_id;
+}
+
+/*
+ * 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;
+
+ IRDA_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);
+
+ 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, __FUNCTION__ "(), %s not defined by irda yet\n",
+ dongle_types[dongle_id]);
+ break;
+ case 0x02: /* same as */
+ case 0x03: /* Reserved */
+ IRDA_DEBUG(0, __FUNCTION__ "(), %s not defined by irda yet\n",
+ dongle_types[dongle_id]);
+ break;
+ case 0x04: /* Sharp RY5HD01 */
+ IRDA_DEBUG(0, __FUNCTION__ "(), %s not supported yet\n",
+ dongle_types[dongle_id]);
+ break;
+ case 0x05: /* Reserved, but this is what the Thinkpad reports */
+ IRDA_DEBUG(0, __FUNCTION__ "(), %s not defined by irda yet\n",
+ dongle_types[dongle_id]);
+ break;
+ case 0x06: /* Single-ended serial interface */
+ IRDA_DEBUG(0, __FUNCTION__ "(), %s not defined by irda yet\n",
+ dongle_types[dongle_id]);
+ break;
+ case 0x07: /* Consumer-IR only */
+ IRDA_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 */
+ IRDA_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 */
+ IRDA_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 */
+ IRDA_DEBUG(0, __FUNCTION__ "(), %s\n",
+ dongle_types[dongle_id]);
+
+ switch_bank(iobase, BANK0);
+ outb(0x62, iobase+MCR);
+ break;
+ default:
+ IRDA_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 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;
+
+ IRDA_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 */
+ IRDA_DEBUG(0, __FUNCTION__ "(), %s not defined by irda yet\n",
+ dongle_types[dongle_id]);
+ break;
+ case 0x02: /* same as */
+ case 0x03: /* Reserved */
+ IRDA_DEBUG(0, __FUNCTION__ "(), %s not defined by irda yet\n",
+ dongle_types[dongle_id]);
+ break;
+ case 0x04: /* Sharp RY5HD01 */
+ IRDA_DEBUG(0, __FUNCTION__ "(), %s not supported yet\n",
+ dongle_types[dongle_id]);
+ case 0x05: /* Reserved */
+ IRDA_DEBUG(0, __FUNCTION__ "(), %s not defined by irda yet\n",
+ dongle_types[dongle_id]);
+ break;
+ case 0x06: /* Single-ended serial interface */
+ IRDA_DEBUG(0, __FUNCTION__ "(), %s not defined by irda yet\n",
+ dongle_types[dongle_id]);
+ break;
+ case 0x07: /* Consumer-IR only */
+ IRDA_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 */
+ IRDA_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 */
+ IRDA_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 */
+ IRDA_DEBUG(0, __FUNCTION__ "(), %s is not for IrDA mode\n",
+ dongle_types[dongle_id]);
+
+ switch_bank(iobase, BANK0);
+ outb(0x62, iobase+MCR);
+ break;
+ default:
+ IRDA_DEBUG(0, __FUNCTION__ "(), invalid data_rate\n");
+ }
+ /* 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 device *dev = self->netdev;
+ __u8 mcr = MCR_SIR;
+ int iobase;
+ __u8 bank;
+
+ IRDA_DEBUG(2, __FUNCTION__ "(), speed=%d\n", speed);
+
+ ASSERT(self != NULL, return;);
+
+ iobase = self->io.iobase;
+
+ /* 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, __FUNCTION__ "(), handling baud of 576000\n");
+ break;
+ case 1152000:
+ mcr = MCR_MIR;
+ IRDA_DEBUG(0, __FUNCTION__ "(), handling baud of 1152000\n");
+ break;
+ case 4000000:
+ mcr = MCR_FIR;
+ IRDA_DEBUG(0, __FUNCTION__ "(), handling baud of 4000000\n");
+ break;
+ default:
+ mcr = MCR_FIR;
+ IRDA_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 */
+ 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);
+
+ self->netdev->tbusy = 0;
+
+ /* 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);
+}
+
+/*
+ * Function nsc_ircc_hard_xmit (skb, dev)
+ *
+ * Transmit the frame!
+ *
+ */
+static int nsc_ircc_hard_xmit_sir(struct sk_buff *skb, struct device *dev)
+{
+ struct nsc_ircc_cb *self;
+ unsigned long flags;
+ int iobase;
+ __u32 speed;
+ __u8 bank;
+
+ self = (struct nsc_ircc_cb *) dev->priv;
+
+ ASSERT(self != NULL, return 0;);
+
+ iobase = self->io.iobase;
+
+ /* Lock transmit buffer */
+ if (irda_lock((void *) &dev->tbusy) == FALSE)
+ return -EBUSY;
+
+ /* Check if we need to change the speed */
+ if ((speed = irda_get_speed(skb)) != self->io.speed)
+ 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);
+
+ /* 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 device *dev)
+{
+ struct nsc_ircc_cb *self;
+ unsigned long flags;
+ int iobase;
+ __u32 speed;
+ __u8 bank;
+ int mtt, diff;
+
+ self = (struct nsc_ircc_cb *) dev->priv;
+
+ ASSERT(self != NULL, return 0;);
+
+ iobase = self->io.iobase;
+
+ /* Lock transmit buffer */
+ if (irda_lock((void *) &dev->tbusy) == FALSE)
+ return -EBUSY;
+
+ /* Check if we need to change the speed */
+ if ((speed = irda_get_speed(skb)) != self->io.speed)
+ 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;
+
+ 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 */
+ get_fast_time(&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_WINDOW)
+ dev->tbusy = 0;
+
+ /* 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 transfered
+ *
+ */
+static int nsc_ircc_pio_write(int iobase, __u8 *buf, int len, int fifo_size)
+{
+ int actual = 0;
+ __u8 bank;
+
+ IRDA_DEBUG(4, __FUNCTION__ "()\n");
+
+ /* Save current bank */
+ bank = inb(iobase+BSR);
+
+ switch_bank(iobase, BANK0);
+ if (!(inb_p(iobase+LSR) & LSR_TXEMP)) {
+ IRDA_DEBUG(4, __FUNCTION__
+ "(), warning, FIFO not empty yet!\n");
+
+ 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, __FUNCTION__ "(), fifo_size %d ; %d sent of %d\n",
+ 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, __FUNCTION__ "()\n");
+
+ iobase = self->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) {
+ 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++;
+ self->stats.tx_bytes += self->tx_buff.len;
+ }
+
+ 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_WINDOW) {
+ /* Not busy transmitting anymore */
+ self->netdev->tbusy = 0;
+
+ /* Tell the network layer, that we can accept more frames */
+ mark_bh(NET_BH);
+ }
+
+ /* 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;
+
+ ASSERT(self != NULL, return -1;);
+
+ iobase = self->io.iobase;
+
+ /* 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.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 sk_buff *skb;
+ struct st_fifo *st_fifo;
+ __u8 bank;
+ __u8 status;
+ int len;
+
+ 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 */
+ 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 */
+ 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 {
+ /* Check if we have transfered all data to memory */
+ switch_bank(iobase, BANK0);
+ 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! */
+ }
+
+ /*
+ * Remember when 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
+ */
+ get_fast_time(&self->stamp);
+
+ skb = dev_alloc_skb(len+1);
+ if (skb == NULL) {
+ WARNING(__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 (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_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 = 0x00;
+ int iobase;
+
+ IRDA_DEBUG(4, __FUNCTION__ "()\n");
+
+ ASSERT(self != NULL, return;);
+
+ iobase = self->io.iobase;
+
+ /* 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 __u8 nsc_ircc_sir_interrupt(struct nsc_ircc_cb *self, int eir)
+{
+ int actual;
+ __u8 new_ier = 0;
+
+ /* 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.iobase,
+ self->tx_buff.data,
+ self->tx_buff.len,
+ self->io.fifo_size);
+ self->tx_buff.data += actual;
+ self->tx_buff.len -= actual;
+
+ self->io.direction = IO_XMIT;
+
+ /* Check if finished */
+ if (self->tx_buff.len > 0)
+ new_ier |= IER_TXLDL_IE;
+ else {
+ self->netdev->tbusy = 0; /* Unlock */
+ self->stats.tx_packets++;
+
+ mark_bh(NET_BH);
+
+ new_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, __FUNCTION__ "(), Changing speed!\n");
+ 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 */
+ new_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;
+ new_ier |= IER_RXHDL_IE;
+ }
+
+ /* Rx FIFO threshold or timeout */
+ if (eir & EIR_RXHDL_EV) {
+ nsc_ircc_pio_receive(self);
+
+ /* Keep receiving */
+ new_ier |= IER_RXHDL_IE;
+ }
+ return new_ier;
+}
+
+/*
+ * Function nsc_ircc_fir_interrupt (self, eir)
+ *
+ * Handle MIR/FIR interrupt
+ *
+ */
+static __u8 nsc_ircc_fir_interrupt(struct nsc_ircc_cb *self, 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 (nsc_ircc_dma_receive_complete(self, iobase)) {
+
+ /* Wait for next status FIFO interrupt */
+ new_ier |= IER_SFIF_IE;
+ } else {
+ /*
+ * DMA not finished yet, so try again later, set
+ * timer value, resolution 125 us
+ */
+ switch_bank(iobase, BANK4);
+ outb(0x07, iobase+TMRL); /* 125 us * 7 = 875 us */
+ outb(0x00, iobase+TMRH);
+
+ /* Start timer */
+ outb(IRCR1_TMR_EN, iobase+IRCR1);
+
+ new_ier |= 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 */
+ new_ier |= IER_DMA_IE;
+ } else {
+ /* Check if DMA has now finished */
+ nsc_ircc_dma_receive_complete(self, iobase);
+
+ new_ier |= IER_SFIF_IE;
+ }
+ } else if (eir & EIR_DMA_EV) { /* Finished with transmission */
+ 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);
+
+ new_ier = IER_LS_IE|IER_SFIF_IE;
+ }
+ } else {
+ /* Not finished yet, so interrupt on DMA again */
+ new_ier |= IER_DMA_IE;
+ }
+ }
+ outb(bank, iobase+BSR);
+
+ return new_ier;
+}
+
+/*
+ * 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 device *dev = (struct device *) dev_id;
+ struct nsc_ircc_cb *self;
+ __u8 bsr, eir, ier;
+ int iobase;
+
+ if (!dev) {
+ printk(KERN_WARNING "%s: irq %d for unknown device.\n",
+ driver_name, irq);
+ return;
+ }
+ self = (struct nsc_ircc_cb *) dev->priv;
+
+ spin_lock(&self->lock);
+ dev->interrupt = 1;
+
+ iobase = self->io.iobase;
+
+ bsr = inb(iobase+BSR); /* Save current bank */
+
+ 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 (self->io.speed > 115200)
+ ier = nsc_ircc_fir_interrupt(self, iobase, eir);
+ else
+ ier = nsc_ircc_sir_interrupt(self, eir);
+ }
+
+ outb(ier, iobase+IER); /* Restore interrupts */
+ outb(bsr, iobase+BSR); /* Restore bank register */
+
+ dev->interrupt = 0;
+ 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)
+{
+ int status = FALSE;
+ int iobase;
+ __u8 bank;
+
+ ASSERT(self != NULL, return FALSE;);
+
+ if (self->io.speed > 115200) {
+ iobase = self->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 = (self->rx_buff.state != OUTSIDE_FRAME);
+
+ return status;
+}
+
+/*
+ * Function nsc_ircc_net_init (dev)
+ *
+ * Initialize network device
+ *
+ */
+static int nsc_ircc_net_init(struct device *dev)
+{
+ IRDA_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 nsc_ircc_net_open (dev)
+ *
+ * Start the device
+ *
+ */
+static int nsc_ircc_net_open(struct device *dev)
+{
+ struct nsc_ircc_cb *self;
+ int iobase;
+ __u8 bank;
+
+ IRDA_DEBUG(4, __FUNCTION__ "()\n");
+
+ ASSERT(dev != NULL, return -1;);
+ self = (struct nsc_ircc_cb *) dev->priv;
+
+ ASSERT(self != NULL, return 0;);
+
+ iobase = self->io.iobase;
+
+ if (request_irq(self->io.irq, nsc_ircc_interrupt, 0, dev->name,
+ (void *) dev))
+ {
+ return -EAGAIN;
+ }
+ /*
+ * Always allocate the DMA channel after the IRQ, and clean up on
+ * failure.
+ */
+ if (request_dma(self->io.dma, dev->name)) {
+ free_irq(self->io.irq, self);
+ 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! */
+ dev->tbusy = 0;
+ dev->interrupt = 0;
+ dev->start = 1;
+
+ /*
+ * Open new IrLAP layer instance, now that everything should be
+ * initialized properly
+ */
+ self->irlap = irlap_open(dev, &self->qos);
+
+ MOD_INC_USE_COUNT;
+
+ return 0;
+}
+
+/*
+ * Function nsc_ircc_net_close (dev)
+ *
+ * Stop the device
+ *
+ */
+static int nsc_ircc_net_close(struct device *dev)
+{
+ struct nsc_ircc_cb *self;
+ int iobase;
+ __u8 bank;
+
+ IRDA_DEBUG(4, __FUNCTION__ "()\n");
+
+ ASSERT(dev != NULL, return -1;);
+ self = (struct nsc_ircc_cb *) dev->priv;
+
+ ASSERT(self != NULL, return 0;);
+
+ /* Stop device */
+ dev->tbusy = 1;
+ dev->start = 0;
+
+ /* Stop and remove instance of IrLAP */
+ if (self->irlap)
+ irlap_close(self->irlap);
+ self->irlap = NULL;
+
+ iobase = self->io.iobase;
+
+ 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 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, __FUNCTION__ "(), %s, (cmd=0x%X)\n", dev->name, cmd);
+
+ /* Disable interrupts & save flags */
+ save_flags(flags);
+ cli();
+
+ switch (cmd) {
+ case SIOCSBANDWIDTH: /* Set bandwidth */
+ nsc_ircc_change_speed(self, irq->ifr_baudrate);
+ break;
+ case SIOCSMEDIABUSY: /* Set media busy */
+ 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;
+ }
+
+ restore_flags(flags);
+
+ return ret;
+}
+
+static struct net_device_stats *nsc_ircc_net_get_stats(struct device *dev)
+{
+ struct nsc_ircc_cb *self = (struct nsc_ircc_cb *) dev->priv;
+
+ return &self->stats;
+}
+
+#ifdef CONFIG_APM
+static void nsc_ircc_suspend(struct nsc_ircc_cb *self)
+{
+ int i = 10;
+
+ MESSAGE("%s, Suspending\n", driver_name);
+
+ if (self->suspend)
+ return;
+
+ self->suspend = 1;
+}
+
+
+static void nsc_ircc_wakeup(struct nsc_ircc_cb *self)
+{
+ struct device *dev = self->netdev;
+ unsigned long flags;
+
+ if (!self->suspend)
+ return;
+
+ save_flags(flags);
+ cli();
+
+
+ restore_flags(flags);
+ MESSAGE("%s, Waking up\n", driver_name);
+}
+
+static int nsc_ircc_apmproc(apm_event_t event)
+{
+ static int down = 0; /* Filter out double events */
+ int i;
+
+ switch (event) {
+ case APM_SYS_SUSPEND:
+ case APM_USER_SUSPEND:
+ if (!down) {
+ for (i = 0; i < 4; i++) {
+ if (dev_self[i])
+ nsc_ircc_suspend(dev_self[i]);
+ }
+ }
+ down = 1;
+ break;
+ case APM_NORMAL_RESUME:
+ case APM_CRITICAL_RESUME:
+ if (down) {
+ for (i = 0; i < 4; i++) {
+ if (dev_self[i])
+ nsc_ircc_wakeup(dev_self[i]);
+ }
+ }
+ down = 0;
+ break;
+ }
+ return 0;
+}
+#endif /* CONFIG_APM */
+
+#ifdef MODULE
+MODULE_AUTHOR("Dag Brattli <dagb@cs.uit.no>");
+MODULE_DESCRIPTION("NSC FIR IrDA Device Driver");
+
+MODULE_PARM(qos_mtt_bits, "i");
+MODULE_PARM(io, "1-4i");
+MODULE_PARM(io2, "1-4i");
+MODULE_PARM(irq, "1-4i");
+MODULE_PARM(dongle_id, "i");
+
+int init_module(void)
+{
+ return nsc_ircc_init();
+}
+
+void cleanup_module(void)
+{
+ nsc_ircc_cleanup();
+}
+#endif /* MODULE */
+
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TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)