diff options
Diffstat (limited to '')
| -rw-r--r-- | drivers/isdn/hardware/mISDN/avmfritz.c | 1163 |
1 files changed, 1163 insertions, 0 deletions
diff --git a/drivers/isdn/hardware/mISDN/avmfritz.c b/drivers/isdn/hardware/mISDN/avmfritz.c new file mode 100644 index 000000000..f68569bfe --- /dev/null +++ b/drivers/isdn/hardware/mISDN/avmfritz.c @@ -0,0 +1,1163 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * 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> + */ +#include <linux/interrupt.h> +#include <linux/module.h> +#include <linux/pci.h> +#include <linux/delay.h> +#include <linux/mISDNhw.h> +#include <linux/slab.h> +#include <asm/unaligned.h> +#include "ipac.h" + + +#define AVMFRITZ_REV "2.3" + +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_FIFO_SIZE_128 0x20 +#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_V1 0x3f00 +#define HDLC_STAT_RML_MASK_V2 0x7f00 + +#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_V1 32 +#define HDLC_FIFO_SIZE_V2 128 + +/* 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, const 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)); +} + +static 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; + u8 mode; + + 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; + mode = (fc->type == AVM_FRITZ_PCIV2) ? HDLC_FIFO_SIZE_128 : 0; + + switch (protocol) { + case -1: /* used for init */ + bch->state = -1; + fallthrough; + 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 = 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 = 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 = 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; + struct fritzcard *fc = bch->hw; + + pr_debug("%s: %s %d\n", fc->name, __func__, count); + if (test_bit(FLG_RX_OFF, &bch->Flags)) { + p = NULL; + bch->dropcnt += count; + } else { + cnt = bchannel_get_rxbuf(bch, count); + if (cnt < 0) { + pr_warn("%s.B%d: No bufferspace for %d bytes\n", + fc->name, bch->nr, count); + return; + } + p = skb_put(bch->rx_skb, count); + } + ptr = (u32 *)p; + if (fc->type == AVM_FRITZ_PCIV2) + 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); + } + cnt = 0; + while (cnt < count) { + val = le32_to_cpu(inl(addr)); + if (p) { + put_unaligned(val, ptr); + ptr++; + } + cnt += 4; + } + if (p && (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, fs, cnt = 0, idx; + bool fillempty = false; + u8 *p; + u32 *ptr, val, addr; + + idx = (bch->nr - 1) & 1; + hdlc = &fc->hdlc[idx]; + fs = (fc->type == AVM_FRITZ_PCIV2) ? + HDLC_FIFO_SIZE_V2 : HDLC_FIFO_SIZE_V1; + if (!bch->tx_skb) { + if (!test_bit(FLG_TX_EMPTY, &bch->Flags)) + return; + count = fs; + p = bch->fill; + fillempty = true; + } else { + 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 > fs) { + count = fs; + } else { + if (test_bit(FLG_HDLC, &bch->Flags)) + hdlc->ctrl.sr.cmd |= HDLC_CMD_XME; + } + ptr = (u32 *)p; + if (!fillempty) { + pr_debug("%s.B%d: %d/%d/%d", fc->name, bch->nr, count, + bch->tx_idx, bch->tx_skb->len); + bch->tx_idx += count; + } else { + pr_debug("%s.B%d: fillempty %d\n", fc->name, bch->nr, count); + } + hdlc->ctrl.sr.xml = ((count == fs) ? 0 : count); + if (fc->type == AVM_FRITZ_PCIV2) { + __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; + } + if (fillempty) { + while (cnt < count) { + /* all bytes the same - no worry about endian */ + outl(*ptr, addr); + cnt += 4; + } + } else { + while (cnt < count) { + val = get_unaligned(ptr); + outl(cpu_to_le32(val), addr); + ptr++; + cnt += 4; + } + } + if ((debug & DEBUG_HW_BFIFO) && !fillempty) { + 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 { + dev_kfree_skb(bch->tx_skb); + if (get_next_bframe(bch)) { + hdlc_fill_fifo(bch); + test_and_clear_bit(FLG_TX_EMPTY, &bch->Flags); + } else if (test_bit(FLG_TX_EMPTY, &bch->Flags)) { + hdlc_fill_fifo(bch); + } + } +} + +static void +HDLC_irq(struct bchannel *bch, u32 stat) +{ + struct fritzcard *fc = bch->hw; + int len, fs; + u32 rmlMask; + 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 (fc->type == AVM_FRITZ_PCIV2) { + rmlMask = HDLC_STAT_RML_MASK_V2; + fs = HDLC_FIFO_SIZE_V2; + } else { + rmlMask = HDLC_STAT_RML_MASK_V1; + fs = HDLC_FIFO_SIZE_V1; + } + if (stat & HDLC_INT_RPR) { + if (stat & HDLC_STAT_RDO) { + pr_warn("%s: ch%d stat %x RDO\n", + fc->name, bch->nr, stat); + 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 & rmlMask) >> 8; + if (!len) + len = fs; + hdlc_empty_fifo(bch, len); + if (!bch->rx_skb) + goto handle_tx; + if (test_bit(FLG_TRANSPARENT, &bch->Flags)) { + recv_Bchannel(bch, 0, false); + } else if (stat & HDLC_STAT_RME) { + if ((stat & HDLC_STAT_CRCVFRRAB) == + HDLC_STAT_CRCVFR) { + recv_Bchannel(bch, 0, false); + } else { + pr_warn("%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 + */ + pr_warn("%s: ch%d stat %x XDU %s\n", fc->name, bch->nr, + stat, bch->tx_skb ? "tx_skb" : "no tx_skb"); + if (bch->tx_skb && bch->tx_skb->len) { + if (!test_bit(FLG_TRANSPARENT, &bch->Flags)) + bch->tx_idx = 0; + } else if (test_bit(FLG_FILLEMPTY, &bch->Flags)) { + test_and_set_bit(FLG_TX_EMPTY, &bch->Flags); + } + 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); + unsigned 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 */ + hdlc_fill_fifo(bch); + ret = 0; + } + 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); +} + +static 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 (fc->type == AVM_FRITZ_PCIV2) { + 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) +{ + return mISDN_ctrl_bchannel(bch, cq); +} + +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); + cancel_work_sync(&bch->workq); + spin_lock_irqsave(&fc->lock, flags); + mISDN_clear_bchannel(bch); + 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 | MISDN_CTRL_L1_TIMER3; + 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; + case MISDN_CTRL_L1_TIMER3: + ret = fc->isac.ctrl(&fc->isac, HW_TIMER3_VALUE, cq->p1); + 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 == 0 || 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 */ + 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; +} + +static 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 +setup_instance(struct fritzcard *card) +{ + int i, err; + unsigned short minsize; + 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); + if (AVM_FRITZ_PCIV2 == card->type) + minsize = HDLC_FIFO_SIZE_V2; + else + minsize = HDLC_FIFO_SIZE_V1; + mISDN_initbchannel(&card->bch[i], MAX_DATA_MEM, minsize); + 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 +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 +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 already removed\n", __func__); +} + +static const struct pci_device_id fcpci_ids[] = { + { 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 = 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); |