mISDN: Driver for AVM Fritz!CARD PCI

Add mISDN driver for AVM FRITZ!CARD PCI (all versions).

Signed-off-by: Karsten Keil <keil@b1-systems.de>

3 files changed, 1161 insertions, 0 deletions

diff --git a/drivers/isdn/hardware/mISDN/Kconfig b/drivers/isdn/hardware/mISDN/Kconfig
index a8542b81f95c..212dee6adec6 100644
--- a/drivers/isdn/hardware/mISDN/Kconfig
+++ b/drivers/isdn/hardware/mISDN/Kconfig
@@ -39,6 +39,14 @@ config MISDN_HFCUSB
 	  Enable support for USB ISDN TAs with Cologne Chip AG's
 	  HFC-S USB ISDN Controller
 
+config MISDN_AVMFRITZ
+	tristate "Support for AVM FRITZ!CARD PCI"
+	depends on MISDN
+	depends on PCI
+	select MISDN_IPAC
+	help
+	  Enable support for AVMs FRITZ!CARD PCI cards
+
 config MISDN_INFINEON
 	tristate "Support for cards with Infineon chipset"
 	depends on MISDN
diff --git a/drivers/isdn/hardware/mISDN/Makefile b/drivers/isdn/hardware/mISDN/Makefile
index 2863455b4939..8204d84af70a 100644
--- a/drivers/isdn/hardware/mISDN/Makefile
+++ b/drivers/isdn/hardware/mISDN/Makefile
@@ -6,6 +6,7 @@
 obj-$(CONFIG_MISDN_HFCPCI) += hfcpci.o
 obj-$(CONFIG_MISDN_HFCMULTI) += hfcmulti.o
 obj-$(CONFIG_MISDN_HFCUSB) += hfcsusb.o
+obj-$(CONFIG_MISDN_AVMFRITZ) += avmfritz.o
 obj-$(CONFIG_MISDN_INFINEON) += mISDNinfineon.o
 # chip modules
 obj-$(CONFIG_MISDN_IPAC) += mISDNipac.o
diff --git a/drivers/isdn/hardware/mISDN/avmfritz.c b/drivers/isdn/hardware/mISDN/avmfritz.c
new file mode 100644
index 000000000000..81ac541d40d9
--- /dev/null
+++ b/drivers/isdn/hardware/mISDN/avmfritz.c
@@ -0,0 +1,1152 @@
+/*
+ * avm_fritz.c    low level stuff for AVM FRITZ!CARD PCI ISDN cards
+ *                Thanks to AVM, Berlin for informations
+ *
+ * Author       Karsten Keil <keil@isdn4linux.de>
+ *
+ * Copyright 2009  by Karsten Keil <keil@isdn4linux.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+#include <linux/mISDNhw.h>
+#include <asm/unaligned.h>
+#include "ipac.h"
+
+
+#define AVMFRITZ_REV	"2.1"
+
+static int AVM_cnt;
+static int debug;
+
+enum {
+	AVM_FRITZ_PCI,
+	AVM_FRITZ_PCIV2,
+};
+
+#define HDLC_FIFO		0x0
+#define HDLC_STATUS		0x4
+#define CHIP_WINDOW		0x10
+
+#define CHIP_INDEX		0x4
+#define AVM_HDLC_1		0x00
+#define AVM_HDLC_2		0x01
+#define AVM_ISAC_FIFO		0x02
+#define AVM_ISAC_REG_LOW	0x04
+#define AVM_ISAC_REG_HIGH	0x06
+
+#define AVM_STATUS0_IRQ_ISAC	0x01
+#define AVM_STATUS0_IRQ_HDLC	0x02
+#define AVM_STATUS0_IRQ_TIMER	0x04
+#define AVM_STATUS0_IRQ_MASK	0x07
+
+#define AVM_STATUS0_RESET	0x01
+#define AVM_STATUS0_DIS_TIMER	0x02
+#define AVM_STATUS0_RES_TIMER	0x04
+#define AVM_STATUS0_ENA_IRQ	0x08
+#define AVM_STATUS0_TESTBIT	0x10
+
+#define AVM_STATUS1_INT_SEL	0x0f
+#define AVM_STATUS1_ENA_IOM	0x80
+
+#define HDLC_MODE_ITF_FLG	0x01
+#define HDLC_MODE_TRANS		0x02
+#define HDLC_MODE_CCR_7		0x04
+#define HDLC_MODE_CCR_16	0x08
+#define HDLC_MODE_TESTLOOP	0x80
+
+#define HDLC_INT_XPR		0x80
+#define HDLC_INT_XDU		0x40
+#define HDLC_INT_RPR		0x20
+#define HDLC_INT_MASK		0xE0
+
+#define HDLC_STAT_RME		0x01
+#define HDLC_STAT_RDO		0x10
+#define HDLC_STAT_CRCVFRRAB	0x0E
+#define HDLC_STAT_CRCVFR	0x06
+#define HDLC_STAT_RML_MASK	0x3f00
+
+#define HDLC_CMD_XRS		0x80
+#define HDLC_CMD_XME		0x01
+#define HDLC_CMD_RRS		0x20
+#define HDLC_CMD_XML_MASK	0x3f00
+#define HDLC_FIFO_SIZE		32
+
+/* Fritz PCI v2.0 */
+
+#define AVM_HDLC_FIFO_1		0x10
+#define AVM_HDLC_FIFO_2		0x18
+
+#define AVM_HDLC_STATUS_1	0x14
+#define AVM_HDLC_STATUS_2	0x1c
+
+#define AVM_ISACX_INDEX		0x04
+#define AVM_ISACX_DATA		0x08
+
+/* data struct */
+#define LOG_SIZE		63
+
+struct hdlc_stat_reg {
+#ifdef __BIG_ENDIAN
+	u8 fill;
+	u8 mode;
+	u8 xml;
+	u8 cmd;
+#else
+	u8 cmd;
+	u8 xml;
+	u8 mode;
+	u8 fill;
+#endif
+} __attribute__((packed));
+
+struct hdlc_hw {
+	union {
+		u32 ctrl;
+		struct hdlc_stat_reg sr;
+	} ctrl;
+	u32 stat;
+};
+
+struct fritzcard {
+	struct list_head	list;
+	struct pci_dev		*pdev;
+	char			name[MISDN_MAX_IDLEN];
+	u8			type;
+	u8			ctrlreg;
+	u16			irq;
+	u32			irqcnt;
+	u32			addr;
+	spinlock_t		lock; /* hw lock */
+	struct isac_hw		isac;
+	struct hdlc_hw		hdlc[2];
+	struct bchannel		bch[2];
+	char			log[LOG_SIZE + 1];
+};
+
+static LIST_HEAD(Cards);
+static DEFINE_RWLOCK(card_lock); /* protect Cards */
+
+static void
+_set_debug(struct fritzcard *card)
+{
+	card->isac.dch.debug = debug;
+	card->bch[0].debug = debug;
+	card->bch[1].debug = debug;
+}
+
+static int
+set_debug(const char *val, struct kernel_param *kp)
+{
+	int ret;
+	struct fritzcard *card;
+
+	ret = param_set_uint(val, kp);
+	if (!ret) {
+		read_lock(&card_lock);
+		list_for_each_entry(card, &Cards, list)
+			_set_debug(card);
+		read_unlock(&card_lock);
+	}
+	return ret;
+}
+
+MODULE_AUTHOR("Karsten Keil");
+MODULE_LICENSE("GPL v2");
+MODULE_VERSION(AVMFRITZ_REV);
+module_param_call(debug, set_debug, param_get_uint, &debug, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(debug, "avmfritz debug mask");
+
+/* Interface functions */
+
+static u8
+ReadISAC_V1(void *p, u8 offset)
+{
+	struct fritzcard *fc = p;
+	u8 idx = (offset > 0x2f) ? AVM_ISAC_REG_HIGH : AVM_ISAC_REG_LOW;
+
+	outb(idx, fc->addr + CHIP_INDEX);
+	return inb(fc->addr + CHIP_WINDOW + (offset & 0xf));
+}
+
+static void
+WriteISAC_V1(void *p, u8 offset, u8 value)
+{
+	struct fritzcard *fc = p;
+	u8 idx = (offset > 0x2f) ? AVM_ISAC_REG_HIGH : AVM_ISAC_REG_LOW;
+
+	outb(idx, fc->addr + CHIP_INDEX);
+	outb(value, fc->addr + CHIP_WINDOW + (offset & 0xf));
+}
+
+static void
+ReadFiFoISAC_V1(void *p, u8 off, u8 *data, int size)
+{
+	struct fritzcard *fc = p;
+
+	outb(AVM_ISAC_FIFO, fc->addr + CHIP_INDEX);
+	insb(fc->addr + CHIP_WINDOW, data, size);
+}
+
+static void
+WriteFiFoISAC_V1(void *p, u8 off, u8 *data, int size)
+{
+	struct fritzcard *fc = p;
+
+	outb(AVM_ISAC_FIFO, fc->addr + CHIP_INDEX);
+	outsb(fc->addr + CHIP_WINDOW, data, size);
+}
+
+static u8
+ReadISAC_V2(void *p, u8 offset)
+{
+	struct fritzcard *fc = p;
+
+	outl(offset, fc->addr + AVM_ISACX_INDEX);
+	return 0xff & inl(fc->addr + AVM_ISACX_DATA);
+}
+
+static void
+WriteISAC_V2(void *p, u8 offset, u8 value)
+{
+	struct fritzcard *fc = p;
+
+	outl(offset, fc->addr + AVM_ISACX_INDEX);
+	outl(value, fc->addr + AVM_ISACX_DATA);
+}
+
+static void
+ReadFiFoISAC_V2(void *p, u8 off, u8 *data, int size)
+{
+	struct fritzcard *fc = p;
+	int i;
+
+	outl(off, fc->addr + AVM_ISACX_INDEX);
+	for (i = 0; i < size; i++)
+		data[i] = 0xff & inl(fc->addr + AVM_ISACX_DATA);
+}
+
+static void
+WriteFiFoISAC_V2(void *p, u8 off, u8 *data, int size)
+{
+	struct fritzcard *fc = p;
+	int i;
+
+	outl(off, fc->addr + AVM_ISACX_INDEX);
+	for (i = 0; i < size; i++)
+		outl(data[i], fc->addr + AVM_ISACX_DATA);
+}
+
+static struct bchannel *
+Sel_BCS(struct fritzcard *fc, u32 channel)
+{
+	if (test_bit(FLG_ACTIVE, &fc->bch[0].Flags) &&
+		(fc->bch[0].nr & channel))
+		return &fc->bch[0];
+	else if (test_bit(FLG_ACTIVE, &fc->bch[1].Flags) &&
+		(fc->bch[1].nr & channel))
+		return &fc->bch[1];
+	else
+		return NULL;
+}
+
+static inline void
+__write_ctrl_pci(struct fritzcard *fc, struct hdlc_hw *hdlc, u32 channel) {
+	u32 idx = channel == 2 ? AVM_HDLC_2 : AVM_HDLC_1;
+
+	outl(idx, fc->addr + CHIP_INDEX);
+	outl(hdlc->ctrl.ctrl, fc->addr + CHIP_WINDOW + HDLC_STATUS);
+}
+
+static inline void
+__write_ctrl_pciv2(struct fritzcard *fc, struct hdlc_hw *hdlc, u32 channel) {
+	outl(hdlc->ctrl.ctrl, fc->addr + (channel == 2 ? AVM_HDLC_STATUS_2 :
+		AVM_HDLC_STATUS_1));
+}
+
+void
+write_ctrl(struct bchannel *bch, int which) {
+	struct fritzcard *fc = bch->hw;
+	struct hdlc_hw *hdlc;
+
+	hdlc = &fc->hdlc[(bch->nr - 1) & 1];
+	pr_debug("%s: hdlc %c wr%x ctrl %x\n", fc->name, '@' + bch->nr,
+		which, hdlc->ctrl.ctrl);
+	switch (fc->type) {
+	case AVM_FRITZ_PCIV2:
+		__write_ctrl_pciv2(fc, hdlc, bch->nr);
+		break;
+	case AVM_FRITZ_PCI:
+		__write_ctrl_pci(fc, hdlc, bch->nr);
+		break;
+	}
+}
+
+
+static inline u32
+__read_status_pci(u_long addr, u32 channel)
+{
+	outl(channel == 2 ? AVM_HDLC_2 : AVM_HDLC_1, addr + CHIP_INDEX);
+	return inl(addr + CHIP_WINDOW + HDLC_STATUS);
+}
+
+static inline u32
+__read_status_pciv2(u_long addr, u32 channel)
+{
+	return inl(addr + (channel == 2 ? AVM_HDLC_STATUS_2 :
+		AVM_HDLC_STATUS_1));
+}
+
+
+static u32
+read_status(struct fritzcard *fc, u32 channel)
+{
+	switch (fc->type) {
+	case AVM_FRITZ_PCIV2:
+		return __read_status_pciv2(fc->addr, channel);
+	case AVM_FRITZ_PCI:
+		return __read_status_pci(fc->addr, channel);
+	}
+	/* dummy */
+	return 0;
+}
+
+static void
+enable_hwirq(struct fritzcard *fc)
+{
+	fc->ctrlreg |= AVM_STATUS0_ENA_IRQ;
+	outb(fc->ctrlreg, fc->addr + 2);
+}
+
+static void
+disable_hwirq(struct fritzcard *fc)
+{
+	fc->ctrlreg &= ~AVM_STATUS0_ENA_IRQ;
+	outb(fc->ctrlreg, fc->addr + 2);
+}
+
+static int
+modehdlc(struct bchannel *bch, int protocol)
+{
+	struct fritzcard *fc = bch->hw;
+	struct hdlc_hw *hdlc;
+
+	hdlc = &fc->hdlc[(bch->nr - 1) & 1];
+	pr_debug("%s: hdlc %c protocol %x-->%x ch %d\n", fc->name,
+		'@' + bch->nr, bch->state, protocol, bch->nr);
+	hdlc->ctrl.ctrl = 0;
+	switch (protocol) {
+	case -1: /* used for init */
+		bch->state = -1;
+	case ISDN_P_NONE:
+		if (bch->state == ISDN_P_NONE)
+			break;
+		hdlc->ctrl.sr.cmd  = HDLC_CMD_XRS | HDLC_CMD_RRS;
+		hdlc->ctrl.sr.mode = HDLC_MODE_TRANS;
+		write_ctrl(bch, 5);
+		bch->state = ISDN_P_NONE;
+		test_and_clear_bit(FLG_HDLC, &bch->Flags);
+		test_and_clear_bit(FLG_TRANSPARENT, &bch->Flags);
+		break;
+	case ISDN_P_B_RAW:
+		bch->state = protocol;
+		hdlc->ctrl.sr.cmd  = HDLC_CMD_XRS | HDLC_CMD_RRS;
+		hdlc->ctrl.sr.mode = HDLC_MODE_TRANS;
+		write_ctrl(bch, 5);
+		hdlc->ctrl.sr.cmd = HDLC_CMD_XRS;
+		write_ctrl(bch, 1);
+		hdlc->ctrl.sr.cmd = 0;
+		test_and_set_bit(FLG_TRANSPARENT, &bch->Flags);
+		break;
+	case ISDN_P_B_HDLC:
+		bch->state = protocol;
+		hdlc->ctrl.sr.cmd  = HDLC_CMD_XRS | HDLC_CMD_RRS;
+		hdlc->ctrl.sr.mode = HDLC_MODE_ITF_FLG;
+		write_ctrl(bch, 5);
+		hdlc->ctrl.sr.cmd = HDLC_CMD_XRS;
+		write_ctrl(bch, 1);
+		hdlc->ctrl.sr.cmd = 0;
+		test_and_set_bit(FLG_HDLC, &bch->Flags);
+		break;
+	default:
+		pr_info("%s: protocol not known %x\n", fc->name, protocol);
+		return -ENOPROTOOPT;
+	}
+	return 0;
+}
+
+static void
+hdlc_empty_fifo(struct bchannel *bch, int count)
+{
+	u32 *ptr;
+	u8 *p;
+	u32  val, addr;
+	int cnt = 0;
+	struct fritzcard *fc = bch->hw;
+
+	pr_debug("%s: %s %d\n", fc->name, __func__, count);
+	if (!bch->rx_skb) {
+		bch->rx_skb = mI_alloc_skb(bch->maxlen, GFP_ATOMIC);
+		if (!bch->rx_skb) {
+			pr_info("%s: B receive out of memory\n",
+				fc->name);
+			return;
+		}
+	}
+	if ((bch->rx_skb->len + count) > bch->maxlen) {
+		pr_debug("%s: overrun %d\n", fc->name,
+			bch->rx_skb->len + count);
+		return;
+	}
+	p = skb_put(bch->rx_skb, count);
+	ptr = (u32 *)p;
+	if (AVM_FRITZ_PCIV2 == fc->type)
+		addr = fc->addr + (bch->nr == 2 ?
+			AVM_HDLC_FIFO_2 : AVM_HDLC_FIFO_1);
+	else {
+		addr = fc->addr + CHIP_WINDOW;
+		outl(bch->nr == 2 ? AVM_HDLC_2 : AVM_HDLC_1, fc->addr);
+	}
+	while (cnt < count) {
+		val = le32_to_cpu(inl(addr));
+		put_unaligned(val, ptr);
+		ptr++;
+		cnt += 4;
+	}
+	if (debug & DEBUG_HW_BFIFO) {
+		snprintf(fc->log, LOG_SIZE, "B%1d-recv %s %d ",
+			bch->nr, fc->name, count);
+		print_hex_dump_bytes(fc->log, DUMP_PREFIX_OFFSET, p, count);
+	}
+}
+
+static void
+hdlc_fill_fifo(struct bchannel *bch)
+{
+	struct fritzcard *fc = bch->hw;
+	struct hdlc_hw *hdlc;
+	int count, cnt = 0;
+	u8 *p;
+	u32 *ptr, val, addr;
+
+	hdlc = &fc->hdlc[(bch->nr - 1) & 1];
+	if (!bch->tx_skb)
+		return;
+	count = bch->tx_skb->len - bch->tx_idx;
+	if (count <= 0)
+		return;
+	p = bch->tx_skb->data + bch->tx_idx;
+	hdlc->ctrl.sr.cmd &= ~HDLC_CMD_XME;
+	if (count > HDLC_FIFO_SIZE) {
+		count = HDLC_FIFO_SIZE;
+	} else {
+		if (test_bit(FLG_HDLC, &bch->Flags))
+			hdlc->ctrl.sr.cmd |= HDLC_CMD_XME;
+	}
+	pr_debug("%s: %s %d/%d/%d", fc->name, __func__, count,
+		bch->tx_idx, bch->tx_skb->len);
+	ptr = (u32 *)p;
+	bch->tx_idx += count;
+	hdlc->ctrl.sr.xml = ((count == HDLC_FIFO_SIZE) ? 0 : count);
+	if (AVM_FRITZ_PCIV2 == fc->type) {
+		__write_ctrl_pciv2(fc, hdlc, bch->nr);
+		addr = fc->addr + (bch->nr == 2 ?
+			AVM_HDLC_FIFO_2 : AVM_HDLC_FIFO_1);
+	} else {
+		__write_ctrl_pci(fc, hdlc, bch->nr);
+		addr = fc->addr + CHIP_WINDOW;
+	}
+	while (cnt < count) {
+		val = get_unaligned(ptr);
+		outl(cpu_to_le32(val), addr);
+		ptr++;
+		cnt += 4;
+	}
+	if (debug & DEBUG_HW_BFIFO) {
+		snprintf(fc->log, LOG_SIZE, "B%1d-send %s %d ",
+			bch->nr, fc->name, count);
+		print_hex_dump_bytes(fc->log, DUMP_PREFIX_OFFSET, p, count);
+	}
+}
+
+static void
+HDLC_irq_xpr(struct bchannel *bch)
+{
+	if (bch->tx_skb && bch->tx_idx < bch->tx_skb->len)
+		hdlc_fill_fifo(bch);
+	else {
+		if (bch->tx_skb) {
+			/* send confirm, on trans, free on hdlc. */
+			if (test_bit(FLG_TRANSPARENT, &bch->Flags))
+				confirm_Bsend(bch);
+			dev_kfree_skb(bch->tx_skb);
+		}
+		if (get_next_bframe(bch))
+			hdlc_fill_fifo(bch);
+	}
+}
+
+static void
+HDLC_irq(struct bchannel *bch, u32 stat)
+{
+	struct fritzcard *fc = bch->hw;
+	int		len;
+	struct hdlc_hw	*hdlc;
+
+	hdlc = &fc->hdlc[(bch->nr - 1) & 1];
+	pr_debug("%s: ch%d stat %#x\n", fc->name, bch->nr, stat);
+	if (stat & HDLC_INT_RPR) {
+		if (stat & HDLC_STAT_RDO) {
+			hdlc->ctrl.sr.xml = 0;
+			hdlc->ctrl.sr.cmd |= HDLC_CMD_RRS;
+			write_ctrl(bch, 1);
+			hdlc->ctrl.sr.cmd &= ~HDLC_CMD_RRS;
+			write_ctrl(bch, 1);
+			if (bch->rx_skb)
+				skb_trim(bch->rx_skb, 0);
+		} else {
+			len = (stat & HDLC_STAT_RML_MASK) >> 8;
+			if (!len)
+				len = 32;
+			hdlc_empty_fifo(bch, len);
+			if (!bch->rx_skb)
+				goto handle_tx;
+			if ((stat & HDLC_STAT_RME) || test_bit(FLG_TRANSPARENT,
+			    &bch->Flags)) {
+				if (((stat & HDLC_STAT_CRCVFRRAB) ==
+				    HDLC_STAT_CRCVFR) ||
+				    test_bit(FLG_TRANSPARENT, &bch->Flags)) {
+					recv_Bchannel(bch, 0);
+				} else {
+					pr_debug("%s: got invalid frame\n",
+						fc->name);
+					skb_trim(bch->rx_skb, 0);
+				}
+			}
+		}
+	}
+handle_tx:
+	if (stat & HDLC_INT_XDU) {
+		/* Here we lost an TX interrupt, so
+		 * restart transmitting the whole frame on HDLC
+		 * in transparent mode we send the next data
+		 */
+		if (bch->tx_skb)
+			pr_debug("%s: ch%d XDU len(%d) idx(%d) Flags(%lx)\n",
+				fc->name, bch->nr, bch->tx_skb->len,
+				bch->tx_idx, bch->Flags);
+		else
+			pr_debug("%s: ch%d XDU no tx_skb Flags(%lx)\n",
+				fc->name, bch->nr, bch->Flags);
+		if (bch->tx_skb && bch->tx_skb->len) {
+			if (!test_bit(FLG_TRANSPARENT, &bch->Flags))
+				bch->tx_idx = 0;
+		}
+		hdlc->ctrl.sr.xml = 0;
+		hdlc->ctrl.sr.cmd |= HDLC_CMD_XRS;
+		write_ctrl(bch, 1);
+		hdlc->ctrl.sr.cmd &= ~HDLC_CMD_XRS;
+		HDLC_irq_xpr(bch);
+		return;
+	} else if (stat & HDLC_INT_XPR)
+		HDLC_irq_xpr(bch);
+}
+
+static inline void
+HDLC_irq_main(struct fritzcard *fc)
+{
+	u32 stat;
+	struct bchannel *bch;
+
+	stat = read_status(fc, 1);
+	if (stat & HDLC_INT_MASK) {
+		bch = Sel_BCS(fc, 1);
+		if (bch)
+			HDLC_irq(bch, stat);
+		else
+			pr_debug("%s: spurious ch1 IRQ\n", fc->name);
+	}
+	stat = read_status(fc, 2);
+	if (stat & HDLC_INT_MASK) {
+		bch = Sel_BCS(fc, 2);
+		if (bch)
+			HDLC_irq(bch, stat);
+		else
+			pr_debug("%s: spurious ch2 IRQ\n", fc->name);
+	}
+}
+
+static irqreturn_t
+avm_fritz_interrupt(int intno, void *dev_id)
+{
+	struct fritzcard *fc = dev_id;
+	u8 val;
+	u8 sval;
+
+	spin_lock(&fc->lock);
+	sval = inb(fc->addr + 2);
+	pr_debug("%s: irq stat0 %x\n", fc->name, sval);
+	if ((sval & AVM_STATUS0_IRQ_MASK) == AVM_STATUS0_IRQ_MASK) {
+		/* shared  IRQ from other HW */
+		spin_unlock(&fc->lock);
+		return IRQ_NONE;
+	}
+	fc->irqcnt++;
+
+	if (!(sval & AVM_STATUS0_IRQ_ISAC)) {
+		val = ReadISAC_V1(fc, ISAC_ISTA);
+		mISDNisac_irq(&fc->isac, val);
+	}
+	if (!(sval & AVM_STATUS0_IRQ_HDLC))
+		HDLC_irq_main(fc);
+	spin_unlock(&fc->lock);
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t
+avm_fritzv2_interrupt(int intno, void *dev_id)
+{
+	struct fritzcard *fc = dev_id;
+	u8 val;
+	u8 sval;
+
+	spin_lock(&fc->lock);
+	sval = inb(fc->addr + 2);
+	pr_debug("%s: irq stat0 %x\n", fc->name, sval);
+	if (!(sval & AVM_STATUS0_IRQ_MASK)) {
+		/* shared  IRQ from other HW */
+		spin_unlock(&fc->lock);
+		return IRQ_NONE;
+	}
+	fc->irqcnt++;
+
+	if (sval & AVM_STATUS0_IRQ_HDLC)
+		HDLC_irq_main(fc);
+	if (sval & AVM_STATUS0_IRQ_ISAC) {
+		val = ReadISAC_V2(fc, ISACX_ISTA);
+		mISDNisac_irq(&fc->isac, val);
+	}
+	if (sval & AVM_STATUS0_IRQ_TIMER) {
+		pr_debug("%s: timer irq\n", fc->name);
+		outb(fc->ctrlreg | AVM_STATUS0_RES_TIMER, fc->addr + 2);
+		udelay(1);
+		outb(fc->ctrlreg, fc->addr + 2);
+	}
+	spin_unlock(&fc->lock);
+	return IRQ_HANDLED;
+}
+
+static int
+avm_l2l1B(struct mISDNchannel *ch, struct sk_buff *skb)
+{
+	struct bchannel *bch = container_of(ch, struct bchannel, ch);
+	struct fritzcard *fc = bch->hw;
+	int ret = -EINVAL;
+	struct mISDNhead *hh = mISDN_HEAD_P(skb);
+	u32 id;
+	u_long flags;
+
+	switch (hh->prim) {
+	case PH_DATA_REQ:
+		spin_lock_irqsave(&fc->lock, flags);
+		ret = bchannel_senddata(bch, skb);
+		if (ret > 0) { /* direct TX */
+			id = hh->id; /* skb can be freed */
+			hdlc_fill_fifo(bch);
+			ret = 0;
+			spin_unlock_irqrestore(&fc->lock, flags);
+			if (!test_bit(FLG_TRANSPARENT, &bch->Flags))
+				queue_ch_frame(ch, PH_DATA_CNF, id, NULL);
+		} else
+			spin_unlock_irqrestore(&fc->lock, flags);
+		return ret;
+	case PH_ACTIVATE_REQ:
+		spin_lock_irqsave(&fc->lock, flags);
+		if (!test_and_set_bit(FLG_ACTIVE, &bch->Flags))
+			ret = modehdlc(bch, ch->protocol);
+		else
+			ret = 0;
+		spin_unlock_irqrestore(&fc->lock, flags);
+		if (!ret)
+			_queue_data(ch, PH_ACTIVATE_IND, MISDN_ID_ANY, 0,
+				NULL, GFP_KERNEL);
+		break;
+	case PH_DEACTIVATE_REQ:
+		spin_lock_irqsave(&fc->lock, flags);
+		mISDN_clear_bchannel(bch);
+		modehdlc(bch, ISDN_P_NONE);
+		spin_unlock_irqrestore(&fc->lock, flags);
+		_queue_data(ch, PH_DEACTIVATE_IND, MISDN_ID_ANY, 0,
+			NULL, GFP_KERNEL);
+		ret = 0;
+		break;
+	}
+	if (!ret)
+		dev_kfree_skb(skb);
+	return ret;
+}
+
+static void
+inithdlc(struct fritzcard *fc)
+{
+	modehdlc(&fc->bch[0], -1);
+	modehdlc(&fc->bch[1], -1);
+}
+
+void
+clear_pending_hdlc_ints(struct fritzcard *fc)
+{
+	u32 val;
+
+	val = read_status(fc, 1);
+	pr_debug("%s: HDLC 1 STA %x\n", fc->name, val);
+	val = read_status(fc, 2);
+	pr_debug("%s: HDLC 2 STA %x\n", fc->name, val);
+}
+
+static void
+reset_avm(struct fritzcard *fc)
+{
+	switch (fc->type) {
+	case AVM_FRITZ_PCI:
+		fc->ctrlreg = AVM_STATUS0_RESET | AVM_STATUS0_DIS_TIMER;
+		break;
+	case AVM_FRITZ_PCIV2:
+		fc->ctrlreg = AVM_STATUS0_RESET;
+		break;
+	}
+	if (debug & DEBUG_HW)
+		pr_notice("%s: reset\n", fc->name);
+	disable_hwirq(fc);
+	mdelay(5);
+	switch (fc->type) {
+	case AVM_FRITZ_PCI:
+		fc->ctrlreg = AVM_STATUS0_DIS_TIMER | AVM_STATUS0_RES_TIMER;
+		disable_hwirq(fc);
+		outb(AVM_STATUS1_ENA_IOM, fc->addr + 3);
+		break;
+	case AVM_FRITZ_PCIV2:
+		fc->ctrlreg = 0;
+		disable_hwirq(fc);
+		break;
+	}
+	mdelay(1);
+	if (debug & DEBUG_HW)
+		pr_notice("%s: S0/S1 %x/%x\n", fc->name,
+			inb(fc->addr + 2), inb(fc->addr + 3));
+}
+
+static int
+init_card(struct fritzcard *fc)
+{
+	int		ret, cnt = 3;
+	u_long		flags;
+
+	reset_avm(fc); /* disable IRQ */
+	if (fc->type == AVM_FRITZ_PCIV2)
+		ret = request_irq(fc->irq, avm_fritzv2_interrupt,
+			IRQF_SHARED, fc->name, fc);
+	else
+		ret = request_irq(fc->irq, avm_fritz_interrupt,
+			IRQF_SHARED, fc->name, fc);
+	if (ret) {
+		pr_info("%s: couldn't get interrupt %d\n",
+			fc->name, fc->irq);
+		return ret;
+	}
+	while (cnt--) {
+		spin_lock_irqsave(&fc->lock, flags);
+		ret = fc->isac.init(&fc->isac);
+		if (ret) {
+			spin_unlock_irqrestore(&fc->lock, flags);
+			pr_info("%s: ISAC init failed with %d\n",
+				fc->name, ret);
+			break;
+		}
+		clear_pending_hdlc_ints(fc);
+		inithdlc(fc);
+		enable_hwirq(fc);
+		/* RESET Receiver and Transmitter */
+		if (AVM_FRITZ_PCIV2 == fc->type) {
+			WriteISAC_V2(fc, ISACX_MASK, 0);
+			WriteISAC_V2(fc, ISACX_CMDRD, 0x41);
+		} else {
+			WriteISAC_V1(fc, ISAC_MASK, 0);
+			WriteISAC_V1(fc, ISAC_CMDR, 0x41);
+		}
+		spin_unlock_irqrestore(&fc->lock, flags);
+		/* Timeout 10ms */
+		msleep_interruptible(10);
+		if (debug & DEBUG_HW)
+			pr_notice("%s: IRQ %d count %d\n", fc->name,
+				fc->irq, fc->irqcnt);
+		if (!fc->irqcnt) {
+			pr_info("%s: IRQ(%d) getting no IRQs during init %d\n",
+				fc->name, fc->irq, 3 - cnt);
+			reset_avm(fc);
+		} else
+			return 0;
+	}
+	free_irq(fc->irq, fc);
+	return -EIO;
+}
+
+static int
+channel_bctrl(struct bchannel *bch, struct mISDN_ctrl_req *cq)
+{
+	int ret = 0;
+	struct fritzcard *fc = bch->hw;
+
+	switch (cq->op) {
+	case MISDN_CTRL_GETOP:
+		cq->op = 0;
+		break;
+	/* Nothing implemented yet */
+	case MISDN_CTRL_FILL_EMPTY:
+	default:
+		pr_info("%s: %s unknown Op %x\n", fc->name, __func__, cq->op);
+		ret = -EINVAL;
+		break;
+	}
+	return ret;
+}
+
+static int
+avm_bctrl(struct mISDNchannel *ch, u32 cmd, void *arg)
+{
+	struct bchannel *bch = container_of(ch, struct bchannel, ch);
+	struct fritzcard *fc = bch->hw;
+	int ret = -EINVAL;
+	u_long flags;
+
+	pr_debug("%s: %s cmd:%x %p\n", fc->name, __func__, cmd, arg);
+	switch (cmd) {
+	case CLOSE_CHANNEL:
+		test_and_clear_bit(FLG_OPEN, &bch->Flags);
+		if (test_bit(FLG_ACTIVE, &bch->Flags)) {
+			spin_lock_irqsave(&fc->lock, flags);
+			mISDN_freebchannel(bch);
+			test_and_clear_bit(FLG_TX_BUSY, &bch->Flags);
+			test_and_clear_bit(FLG_ACTIVE, &bch->Flags);
+			modehdlc(bch, ISDN_P_NONE);
+			spin_unlock_irqrestore(&fc->lock, flags);
+		}
+		ch->protocol = ISDN_P_NONE;
+		ch->peer = NULL;
+		module_put(THIS_MODULE);
+		ret = 0;
+		break;
+	case CONTROL_CHANNEL:
+		ret = channel_bctrl(bch, arg);
+		break;
+	default:
+		pr_info("%s: %s unknown prim(%x)\n", fc->name, __func__, cmd);
+	}
+	return ret;
+}
+
+static int
+channel_ctrl(struct fritzcard  *fc, struct mISDN_ctrl_req *cq)
+{
+	int	ret = 0;
+
+	switch (cq->op) {
+	case MISDN_CTRL_GETOP:
+		cq->op = MISDN_CTRL_LOOP;
+		break;
+	case MISDN_CTRL_LOOP:
+		/* cq->channel: 0 disable, 1 B1 loop 2 B2 loop, 3 both */
+		if (cq->channel < 0 || cq->channel > 3) {
+			ret = -EINVAL;
+			break;
+		}
+		ret = fc->isac.ctrl(&fc->isac, HW_TESTLOOP, cq->channel);
+		break;
+	default:
+		pr_info("%s: %s unknown Op %x\n", fc->name, __func__, cq->op);
+		ret = -EINVAL;
+		break;
+	}
+	return ret;
+}
+
+static int
+open_bchannel(struct fritzcard *fc, struct channel_req *rq)
+{
+	struct bchannel		*bch;
+
+	if (rq->adr.channel > 2)
+		return -EINVAL;
+	if (rq->protocol == ISDN_P_NONE)
+		return -EINVAL;
+	bch = &fc->bch[rq->adr.channel - 1];
+	if (test_and_set_bit(FLG_OPEN, &bch->Flags))
+		return -EBUSY; /* b-channel can be only open once */
+	test_and_clear_bit(FLG_FILLEMPTY, &bch->Flags);
+	bch->ch.protocol = rq->protocol;
+	rq->ch = &bch->ch;
+	return 0;
+}
+
+/*
+ * device control function
+ */
+static int
+avm_dctrl(struct mISDNchannel *ch, u32 cmd, void *arg)
+{
+	struct mISDNdevice	*dev = container_of(ch, struct mISDNdevice, D);
+	struct dchannel		*dch = container_of(dev, struct dchannel, dev);
+	struct fritzcard	*fc = dch->hw;
+	struct channel_req	*rq;
+	int			err = 0;
+
+	pr_debug("%s: %s cmd:%x %p\n", fc->name, __func__, cmd, arg);
+	switch (cmd) {
+	case OPEN_CHANNEL:
+		rq = arg;
+		if (rq->protocol == ISDN_P_TE_S0)
+			err = fc->isac.open(&fc->isac, rq);
+		else
+			err = open_bchannel(fc, rq);
+		if (err)
+			break;
+		if (!try_module_get(THIS_MODULE))
+			pr_info("%s: cannot get module\n", fc->name);
+		break;
+	case CLOSE_CHANNEL:
+		pr_debug("%s: dev(%d) close from %p\n", fc->name, dch->dev.id,
+			__builtin_return_address(0));
+		module_put(THIS_MODULE);
+		break;
+	case CONTROL_CHANNEL:
+		err = channel_ctrl(fc, arg);
+		break;
+	default:
+		pr_debug("%s: %s unknown command %x\n",
+			fc->name, __func__, cmd);
+		return -EINVAL;
+	}
+	return err;
+}
+
+int
+setup_fritz(struct fritzcard *fc)
+{
+	u32 val, ver;
+
+	if (!request_region(fc->addr, 32, fc->name)) {
+		pr_info("%s: AVM config port %x-%x already in use\n",
+			fc->name, fc->addr, fc->addr + 31);
+		return -EIO;
+	}
+	switch (fc->type) {
+	case AVM_FRITZ_PCI:
+		val = inl(fc->addr);
+		outl(AVM_HDLC_1, fc->addr + CHIP_INDEX);
+		ver = inl(fc->addr + CHIP_WINDOW + HDLC_STATUS) >> 24;
+		if (debug & DEBUG_HW) {
+			pr_notice("%s: PCI stat %#x\n", fc->name, val);
+			pr_notice("%s: PCI Class %X Rev %d\n", fc->name,
+				val & 0xff, (val >> 8) & 0xff);
+			pr_notice("%s: HDLC version %x\n", fc->name, ver & 0xf);
+		}
+		ASSIGN_FUNC(V1, ISAC, fc->isac);
+		fc->isac.type = IPAC_TYPE_ISAC;
+		break;
+	case AVM_FRITZ_PCIV2:
+		val = inl(fc->addr);
+		ver = inl(fc->addr + AVM_HDLC_STATUS_1) >> 24;
+		if (debug & DEBUG_HW) {
+			pr_notice("%s: PCI V2 stat %#x\n", fc->name, val);
+			pr_notice("%s: PCI V2 Class %X Rev %d\n", fc->name,
+				val & 0xff, (val>>8) & 0xff);
+			pr_notice("%s: HDLC version %x\n", fc->name, ver & 0xf);
+		}
+		ASSIGN_FUNC(V2, ISAC, fc->isac);
+		fc->isac.type = IPAC_TYPE_ISACX;
+		break;
+	default:
+		release_region(fc->addr, 32);
+		pr_info("%s: AVM unknown type %d\n", fc->name, fc->type);
+		return -ENODEV;
+	}
+	pr_notice("%s: %s config irq:%d base:0x%X\n", fc->name,
+		(fc->type == AVM_FRITZ_PCI) ? "AVM Fritz!CARD PCI" :
+		"AVM Fritz!CARD PCIv2", fc->irq, fc->addr);
+	return 0;
+}
+
+static void
+release_card(struct fritzcard *card)
+{
+	u_long flags;
+
+	disable_hwirq(card);
+	spin_lock_irqsave(&card->lock, flags);
+	modehdlc(&card->bch[0], ISDN_P_NONE);
+	modehdlc(&card->bch[1], ISDN_P_NONE);
+	spin_unlock_irqrestore(&card->lock, flags);
+	card->isac.release(&card->isac);
+	free_irq(card->irq, card);
+	mISDN_freebchannel(&card->bch[1]);
+	mISDN_freebchannel(&card->bch[0]);
+	mISDN_unregister_device(&card->isac.dch.dev);
+	release_region(card->addr, 32);
+	pci_disable_device(card->pdev);
+	pci_set_drvdata(card->pdev, NULL);
+	write_lock_irqsave(&card_lock, flags);
+	list_del(&card->list);
+	write_unlock_irqrestore(&card_lock, flags);
+	kfree(card);
+	AVM_cnt--;
+}
+
+static int __devinit
+setup_instance(struct fritzcard *card)
+{
+	int i, err;
+	u_long flags;
+
+	snprintf(card->name, MISDN_MAX_IDLEN - 1, "AVM.%d", AVM_cnt + 1);
+	write_lock_irqsave(&card_lock, flags);
+	list_add_tail(&card->list, &Cards);
+	write_unlock_irqrestore(&card_lock, flags);
+
+	_set_debug(card);
+	card->isac.name = card->name;
+	spin_lock_init(&card->lock);
+	card->isac.hwlock = &card->lock;
+	mISDNisac_init(&card->isac, card);
+
+	card->isac.dch.dev.Bprotocols = (1 << (ISDN_P_B_RAW & ISDN_P_B_MASK)) |
+	    (1 << (ISDN_P_B_HDLC & ISDN_P_B_MASK));
+	card->isac.dch.dev.D.ctrl = avm_dctrl;
+	for (i = 0; i < 2; i++) {
+		card->bch[i].nr = i + 1;
+		set_channelmap(i + 1, card->isac.dch.dev.channelmap);
+		mISDN_initbchannel(&card->bch[i], MAX_DATA_MEM);
+		card->bch[i].hw = card;
+		card->bch[i].ch.send = avm_l2l1B;
+		card->bch[i].ch.ctrl = avm_bctrl;
+		card->bch[i].ch.nr = i + 1;
+		list_add(&card->bch[i].ch.list, &card->isac.dch.dev.bchannels);
+	}
+	err = setup_fritz(card);
+	if (err)
+		goto error;
+	err = mISDN_register_device(&card->isac.dch.dev, &card->pdev->dev,
+		card->name);
+	if (err)
+		goto error_reg;
+	err = init_card(card);
+	if (!err)  {
+		AVM_cnt++;
+		pr_notice("AVM %d cards installed DEBUG\n", AVM_cnt);
+		return 0;
+	}
+	mISDN_unregister_device(&card->isac.dch.dev);
+error_reg:
+	release_region(card->addr, 32);
+error:
+	card->isac.release(&card->isac);
+	mISDN_freebchannel(&card->bch[1]);
+	mISDN_freebchannel(&card->bch[0]);
+	write_lock_irqsave(&card_lock, flags);
+	list_del(&card->list);
+	write_unlock_irqrestore(&card_lock, flags);
+	kfree(card);
+	return err;
+}
+
+static int __devinit
+fritzpci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
+{
+	int err = -ENOMEM;
+	struct fritzcard *card;
+
+	card = kzalloc(sizeof(struct fritzcard), GFP_KERNEL);
+	if (!card) {
+		pr_info("No kmem for fritzcard\n");
+		return err;
+	}
+	if (pdev->device == PCI_DEVICE_ID_AVM_A1_V2)
+		card->type = AVM_FRITZ_PCIV2;
+	else
+		card->type = AVM_FRITZ_PCI;
+	card->pdev = pdev;
+	err = pci_enable_device(pdev);
+	if (err) {
+		kfree(card);
+		return err;
+	}
+
+	pr_notice("mISDN: found adapter %s at %s\n",
+	       (char *) ent->driver_data, pci_name(pdev));
+
+	card->addr = pci_resource_start(pdev, 1);
+	card->irq = pdev->irq;
+	pci_set_drvdata(pdev, card);
+	err = setup_instance(card);
+	if (err)
+		pci_set_drvdata(pdev, NULL);
+	return err;
+}
+
+static void __devexit
+fritz_remove_pci(struct pci_dev *pdev)
+{
+	struct fritzcard *card = pci_get_drvdata(pdev);
+
+	if (card)
+		release_card(card);
+	else
+		if (debug)
+			pr_info("%s: drvdata allready removed\n", __func__);
+}
+
+static struct pci_device_id fcpci_ids[] __devinitdata = {
+	{ PCI_VENDOR_ID_AVM, PCI_DEVICE_ID_AVM_A1, PCI_ANY_ID, PCI_ANY_ID,
+	  0, 0, (unsigned long) "Fritz!Card PCI"},
+	{ PCI_VENDOR_ID_AVM, PCI_DEVICE_ID_AVM_A1_V2, PCI_ANY_ID, PCI_ANY_ID,
+	  0, 0, (unsigned long) "Fritz!Card PCI v2" },
+	{ }
+};
+MODULE_DEVICE_TABLE(pci, fcpci_ids);
+
+static struct pci_driver fcpci_driver = {
+	.name = "fcpci",
+	.probe = fritzpci_probe,
+	.remove = __devexit_p(fritz_remove_pci),
+	.id_table = fcpci_ids,
+};
+
+static int __init AVM_init(void)
+{
+	int err;
+
+	pr_notice("AVM Fritz PCI driver Rev. %s\n", AVMFRITZ_REV);
+	err = pci_register_driver(&fcpci_driver);
+	return err;
+}
+
+static void __exit AVM_cleanup(void)
+{
+	pci_unregister_driver(&fcpci_driver);
+}
+
+module_init(AVM_init);
+module_exit(AVM_cleanup);