Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 449 insertions, 0 deletions

diff --git a/drivers/isdn/act2000/act2000_isa.c b/drivers/isdn/act2000/act2000_isa.c
new file mode 100644
index 000000000000..bc98d77c5ecd
--- /dev/null
+++ b/drivers/isdn/act2000/act2000_isa.c
@@ -0,0 +1,449 @@
+/* $Id: act2000_isa.c,v 1.11.6.3 2001/09/23 22:24:32 kai Exp $
+ *
+ * ISDN lowlevel-module for the IBM ISDN-S0 Active 2000 (ISA-Version).
+ *
+ * Author       Fritz Elfert
+ * Copyright    by Fritz Elfert      <fritz@isdn4linux.de>
+ * 
+ * This software may be used and distributed according to the terms
+ * of the GNU General Public License, incorporated herein by reference.
+ *
+ * Thanks to Friedemann Baitinger and IBM Germany
+ *
+ */
+
+#include "act2000.h"
+#include "act2000_isa.h"
+#include "capi.h"
+
+static act2000_card *irq2card_map[16];
+
+/*
+ * Reset Controller, then try to read the Card's signature.
+ + Return:
+ *   1 = Signature found.
+ *   0 = Signature not found.
+ */
+static int
+act2000_isa_reset(unsigned short portbase)
+{
+        unsigned char reg;
+        int i;
+        int found;
+        int serial = 0;
+
+        found = 0;
+        if ((reg = inb(portbase + ISA_COR)) != 0xff) {
+                outb(reg | ISA_COR_RESET, portbase + ISA_COR);
+                mdelay(10);
+                outb(reg, portbase + ISA_COR);
+                mdelay(10);
+
+                for (i = 0; i < 16; i++) {
+                        if (inb(portbase + ISA_ISR) & ISA_ISR_SERIAL)
+                                serial |= 0x10000;
+                        serial >>= 1;
+                }
+                if (serial == ISA_SER_ID)
+                        found++;
+        }
+        return found;
+}
+
+int
+act2000_isa_detect(unsigned short portbase)
+{
+        int ret = 0;
+
+	if (request_region(portbase, ACT2000_PORTLEN, "act2000isa")) {
+                ret = act2000_isa_reset(portbase);
+		release_region(portbase, ISA_REGION);
+	}
+        return ret;
+}
+
+static irqreturn_t
+act2000_isa_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+{
+        act2000_card *card = irq2card_map[irq];
+        u_char istatus;
+
+        if (!card) {
+                printk(KERN_WARNING
+                       "act2000: Spurious interrupt!\n");
+                return IRQ_NONE;
+        }
+        istatus = (inb(ISA_PORT_ISR) & 0x07);
+        if (istatus & ISA_ISR_OUT) {
+                /* RX fifo has data */
+		istatus &= ISA_ISR_OUT_MASK;
+		outb(0, ISA_PORT_SIS);
+		act2000_isa_receive(card);
+		outb(ISA_SIS_INT, ISA_PORT_SIS);
+        }
+        if (istatus & ISA_ISR_ERR) {
+                /* Error Interrupt */
+		istatus &= ISA_ISR_ERR_MASK;
+                printk(KERN_WARNING "act2000: errIRQ\n");
+        }
+	if (istatus)
+		printk(KERN_DEBUG "act2000: ?IRQ %d %02x\n", irq, istatus);
+	return IRQ_HANDLED;
+}
+
+static void
+act2000_isa_select_irq(act2000_card * card)
+{
+	unsigned char reg;
+
+	reg = (inb(ISA_PORT_COR) & ~ISA_COR_IRQOFF) | ISA_COR_PERR;
+	switch (card->irq) {
+		case 3:
+			reg = ISA_COR_IRQ03;
+			break;
+		case 5:
+			reg = ISA_COR_IRQ05;
+			break;
+		case 7:
+			reg = ISA_COR_IRQ07;
+			break;
+		case 10:
+			reg = ISA_COR_IRQ10;
+			break;
+		case 11:
+			reg = ISA_COR_IRQ11;
+			break;
+		case 12:
+			reg = ISA_COR_IRQ12;
+			break;
+		case 15:
+			reg = ISA_COR_IRQ15;
+			break;
+	}
+	outb(reg, ISA_PORT_COR);
+}
+
+static void
+act2000_isa_enable_irq(act2000_card * card)
+{
+	act2000_isa_select_irq(card);
+	/* Enable READ irq */
+	outb(ISA_SIS_INT, ISA_PORT_SIS);
+}
+
+/*
+ * Install interrupt handler, enable irq on card.
+ * If irq is -1, choose next free irq, else irq is given explicitely.
+ */
+int
+act2000_isa_config_irq(act2000_card * card, short irq)
+{
+        if (card->flags & ACT2000_FLAGS_IVALID) {
+                free_irq(card->irq, NULL);
+                irq2card_map[card->irq] = NULL;
+        }
+        card->flags &= ~ACT2000_FLAGS_IVALID;
+        outb(ISA_COR_IRQOFF, ISA_PORT_COR);
+        if (!irq)
+                return 0;
+
+	if (!request_irq(irq, &act2000_isa_interrupt, 0, card->regname, NULL)) {
+		card->irq = irq;
+		irq2card_map[card->irq] = card;
+		card->flags |= ACT2000_FLAGS_IVALID;
+                printk(KERN_WARNING
+                       "act2000: Could not request irq %d\n",irq);
+                return -EBUSY;
+        } else {
+		act2000_isa_select_irq(card);
+                /* Disable READ and WRITE irq */
+                outb(0, ISA_PORT_SIS);
+                outb(0, ISA_PORT_SOS);
+        }
+        return 0;
+}
+
+int
+act2000_isa_config_port(act2000_card * card, unsigned short portbase)
+{
+        if (card->flags & ACT2000_FLAGS_PVALID) {
+                release_region(card->port, ISA_REGION);
+                card->flags &= ~ACT2000_FLAGS_PVALID;
+        }
+	if (request_region(portbase, ACT2000_PORTLEN, card->regname) == NULL)
+		return -EBUSY;
+	else {
+                card->port = portbase;
+                card->flags |= ACT2000_FLAGS_PVALID;
+                return 0;
+        }
+}
+
+/*
+ * Release ressources, used by an adaptor.
+ */
+void
+act2000_isa_release(act2000_card * card)
+{
+        unsigned long flags;
+
+        spin_lock_irqsave(&card->lock, flags);
+        if (card->flags & ACT2000_FLAGS_IVALID) {
+                free_irq(card->irq, NULL);
+                irq2card_map[card->irq] = NULL;
+        }
+        card->flags &= ~ACT2000_FLAGS_IVALID;
+        if (card->flags & ACT2000_FLAGS_PVALID)
+                release_region(card->port, ISA_REGION);
+        card->flags &= ~ACT2000_FLAGS_PVALID;
+        spin_unlock_irqrestore(&card->lock, flags);
+}
+
+static int
+act2000_isa_writeb(act2000_card * card, u_char data)
+{
+        u_char timeout = 40;
+
+        while (timeout) {
+                if (inb(ISA_PORT_SOS) & ISA_SOS_READY) {
+                        outb(data, ISA_PORT_SDO);
+                        return 0;
+                } else {
+                        timeout--;
+                        udelay(10);
+                }
+        }
+        return 1;
+}
+
+static int
+act2000_isa_readb(act2000_card * card, u_char * data)
+{
+        u_char timeout = 40;
+
+        while (timeout) {
+                if (inb(ISA_PORT_SIS) & ISA_SIS_READY) {
+                        *data = inb(ISA_PORT_SDI);
+                        return 0;
+                } else {
+                        timeout--;
+                        udelay(10);
+                }
+        }
+        return 1;
+}
+
+void
+act2000_isa_receive(act2000_card *card)
+{
+	u_char c;
+
+        if (test_and_set_bit(ACT2000_LOCK_RX, (void *) &card->ilock) != 0)
+		return;
+	while (!act2000_isa_readb(card, &c)) {
+		if (card->idat.isa.rcvidx < 8) {
+                        card->idat.isa.rcvhdr[card->idat.isa.rcvidx++] = c;
+			if (card->idat.isa.rcvidx == 8) {
+				int valid = actcapi_chkhdr(card, (actcapi_msghdr *)&card->idat.isa.rcvhdr);
+
+				if (valid) {
+					card->idat.isa.rcvlen = ((actcapi_msghdr *)&card->idat.isa.rcvhdr)->len;
+					card->idat.isa.rcvskb = dev_alloc_skb(card->idat.isa.rcvlen);
+					if (card->idat.isa.rcvskb == NULL) {
+						card->idat.isa.rcvignore = 1;
+						printk(KERN_WARNING
+						       "act2000_isa_receive: no memory\n");
+						test_and_clear_bit(ACT2000_LOCK_RX, (void *) &card->ilock);
+						return;
+					}
+					memcpy(skb_put(card->idat.isa.rcvskb, 8), card->idat.isa.rcvhdr, 8);
+					card->idat.isa.rcvptr = skb_put(card->idat.isa.rcvskb, card->idat.isa.rcvlen - 8);
+				} else {
+					card->idat.isa.rcvidx = 0;
+					printk(KERN_WARNING
+					       "act2000_isa_receive: Invalid CAPI msg\n");
+					{
+						int i; __u8 *p; __u8 *c; __u8 tmp[30];
+						for (i = 0, p = (__u8 *)&card->idat.isa.rcvhdr, c = tmp; i < 8; i++)
+							c += sprintf(c, "%02x ", *(p++));
+						printk(KERN_WARNING "act2000_isa_receive: %s\n", tmp);
+					}
+				}
+			}
+		} else {
+			if (!card->idat.isa.rcvignore)
+				*card->idat.isa.rcvptr++ = c;
+			if (++card->idat.isa.rcvidx >= card->idat.isa.rcvlen) {
+				if (!card->idat.isa.rcvignore) {
+					skb_queue_tail(&card->rcvq, card->idat.isa.rcvskb);
+					act2000_schedule_rx(card);
+				}
+				card->idat.isa.rcvidx = 0;
+				card->idat.isa.rcvlen = 8;
+				card->idat.isa.rcvignore = 0;
+				card->idat.isa.rcvskb = NULL;
+				card->idat.isa.rcvptr = card->idat.isa.rcvhdr;
+			}
+		}
+	}
+	if (!(card->flags & ACT2000_FLAGS_IVALID)) {
+		/* In polling mode, schedule myself */
+		if ((card->idat.isa.rcvidx) &&
+		    (card->idat.isa.rcvignore ||
+		     (card->idat.isa.rcvidx < card->idat.isa.rcvlen)))
+			act2000_schedule_poll(card);
+	}
+	test_and_clear_bit(ACT2000_LOCK_RX, (void *) &card->ilock);
+}
+
+void
+act2000_isa_send(act2000_card * card)
+{
+	unsigned long flags;
+	struct sk_buff *skb;
+	actcapi_msg *msg;
+	int l;
+
+        if (test_and_set_bit(ACT2000_LOCK_TX, (void *) &card->ilock) != 0)
+		return;
+	while (1) {
+		spin_lock_irqsave(&card->lock, flags);
+		if (!(card->sbuf)) {
+			if ((card->sbuf = skb_dequeue(&card->sndq))) {
+				card->ack_msg = card->sbuf->data;
+				msg = (actcapi_msg *)card->sbuf->data;
+				if ((msg->hdr.cmd.cmd == 0x86) &&
+				    (msg->hdr.cmd.subcmd == 0)   ) {
+					/* Save flags in message */
+					card->need_b3ack = msg->msg.data_b3_req.flags;
+					msg->msg.data_b3_req.flags = 0;
+				}
+			}
+		}
+		spin_unlock_irqrestore(&card->lock, flags);
+		if (!(card->sbuf)) {
+			/* No more data to send */
+			test_and_clear_bit(ACT2000_LOCK_TX, (void *) &card->ilock);
+			return;
+		}
+		skb = card->sbuf;
+		l = 0;
+		while (skb->len) {
+			if (act2000_isa_writeb(card, *(skb->data))) {
+				/* Fifo is full, but more data to send */
+				test_and_clear_bit(ACT2000_LOCK_TX, (void *) &card->ilock);
+				/* Schedule myself */
+				act2000_schedule_tx(card);
+				return;
+			}
+			skb_pull(skb, 1);
+			l++;
+		}
+		msg = (actcapi_msg *)card->ack_msg;
+		if ((msg->hdr.cmd.cmd == 0x86) &&
+		    (msg->hdr.cmd.subcmd == 0)   ) {
+			/*
+			 * If it's user data, reset data-ptr
+			 * and put skb into ackq.
+			 */
+			skb->data = card->ack_msg;
+			/* Restore flags in message */
+			msg->msg.data_b3_req.flags = card->need_b3ack;
+			skb_queue_tail(&card->ackq, skb);
+		} else
+			dev_kfree_skb(skb);
+		card->sbuf = NULL;
+	}
+}
+
+/*
+ * Get firmware ID, check for 'ISDN' signature.
+ */
+static int
+act2000_isa_getid(act2000_card * card)
+{
+
+        act2000_fwid fid;
+        u_char *p = (u_char *) & fid;
+        int count = 0;
+
+        while (1) {
+                if (count > 510)
+                        return -EPROTO;
+                if (act2000_isa_readb(card, p++))
+                        break;
+                count++;
+        }
+        if (count <= 20) {
+                printk(KERN_WARNING "act2000: No Firmware-ID!\n");
+                return -ETIME;
+        }
+        *p = '\0';
+        fid.revlen[0] = '\0';
+        if (strcmp(fid.isdn, "ISDN")) {
+                printk(KERN_WARNING "act2000: Wrong Firmware-ID!\n");
+                return -EPROTO;
+        }
+	if ((p = strchr(fid.revision, '\n')))
+		*p = '\0';
+        printk(KERN_INFO "act2000: Firmware-ID: %s\n", fid.revision);
+	if (card->flags & ACT2000_FLAGS_IVALID) {
+		printk(KERN_DEBUG "Enabling Interrupts ...\n");
+		act2000_isa_enable_irq(card);
+	}
+        return 0;
+}
+
+/*
+ * Download microcode into card, check Firmware signature.
+ */
+int
+act2000_isa_download(act2000_card * card, act2000_ddef __user * cb)
+{
+        unsigned int length;
+        int l;
+        int c;
+        long timeout;
+        u_char *b;
+        u_char __user *p;
+        u_char *buf;
+        act2000_ddef cblock;
+
+        if (!act2000_isa_reset(card->port))
+                return -ENXIO;
+        msleep_interruptible(500);
+        if (copy_from_user(&cblock, cb, sizeof(cblock)))
+        	return -EFAULT;
+        length = cblock.length;
+        p = cblock.buffer;
+        if (!access_ok(VERIFY_READ, p, length))
+                return -EFAULT;
+        buf = (u_char *) kmalloc(1024, GFP_KERNEL);
+        if (!buf)
+                return -ENOMEM;
+        timeout = 0;
+        while (length) {
+                l = (length > 1024) ? 1024 : length;
+                c = 0;
+                b = buf;
+                if (copy_from_user(buf, p, l)) {
+                        kfree(buf);
+                        return -EFAULT;
+                }
+                while (c < l) {
+                        if (act2000_isa_writeb(card, *b++)) {
+                                printk(KERN_WARNING
+                                       "act2000: loader timed out"
+                                       " len=%d c=%d\n", length, c);
+                                kfree(buf);
+                                return -ETIME;
+                        }
+                        c++;
+                }
+                length -= l;
+                p += l;
+        }
+        kfree(buf);
+        msleep_interruptible(500);
+        return (act2000_isa_getid(card));
+}