--- /dev/null
+/*
+ * 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);
projects / GitHub / LineageOS / android_kernel_motorola_exynos9610.git / commitdiff