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![Gustavo A. R. Silva](/assets/img/avatar_default.png)
Replace the existing /* fall through */ comments and its variants with the new pseudo-keyword macro fallthrough[1]. Also, remove unnecessary fall-through markings when it is the case. [1] https://www.kernel.org/doc/html/v5.7/process/deprecated.html?highlight=fallthrough#implicit-switch-case-fall-through Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
1163 lines
27 KiB
C
1163 lines
27 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* avm_fritz.c low level stuff for AVM FRITZ!CARD PCI ISDN cards
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* Thanks to AVM, Berlin for informations
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*
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* Author Karsten Keil <keil@isdn4linux.de>
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*
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* Copyright 2009 by Karsten Keil <keil@isdn4linux.de>
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*/
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#include <linux/interrupt.h>
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#include <linux/module.h>
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#include <linux/pci.h>
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#include <linux/delay.h>
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#include <linux/mISDNhw.h>
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#include <linux/slab.h>
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#include <asm/unaligned.h>
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#include "ipac.h"
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#define AVMFRITZ_REV "2.3"
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static int AVM_cnt;
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static int debug;
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enum {
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AVM_FRITZ_PCI,
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AVM_FRITZ_PCIV2,
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};
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#define HDLC_FIFO 0x0
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#define HDLC_STATUS 0x4
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#define CHIP_WINDOW 0x10
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#define CHIP_INDEX 0x4
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#define AVM_HDLC_1 0x00
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#define AVM_HDLC_2 0x01
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#define AVM_ISAC_FIFO 0x02
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#define AVM_ISAC_REG_LOW 0x04
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#define AVM_ISAC_REG_HIGH 0x06
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#define AVM_STATUS0_IRQ_ISAC 0x01
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#define AVM_STATUS0_IRQ_HDLC 0x02
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#define AVM_STATUS0_IRQ_TIMER 0x04
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#define AVM_STATUS0_IRQ_MASK 0x07
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#define AVM_STATUS0_RESET 0x01
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#define AVM_STATUS0_DIS_TIMER 0x02
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#define AVM_STATUS0_RES_TIMER 0x04
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#define AVM_STATUS0_ENA_IRQ 0x08
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#define AVM_STATUS0_TESTBIT 0x10
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#define AVM_STATUS1_INT_SEL 0x0f
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#define AVM_STATUS1_ENA_IOM 0x80
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#define HDLC_MODE_ITF_FLG 0x01
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#define HDLC_MODE_TRANS 0x02
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#define HDLC_MODE_CCR_7 0x04
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#define HDLC_MODE_CCR_16 0x08
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#define HDLC_FIFO_SIZE_128 0x20
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#define HDLC_MODE_TESTLOOP 0x80
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#define HDLC_INT_XPR 0x80
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#define HDLC_INT_XDU 0x40
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#define HDLC_INT_RPR 0x20
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#define HDLC_INT_MASK 0xE0
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#define HDLC_STAT_RME 0x01
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#define HDLC_STAT_RDO 0x10
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#define HDLC_STAT_CRCVFRRAB 0x0E
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#define HDLC_STAT_CRCVFR 0x06
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#define HDLC_STAT_RML_MASK_V1 0x3f00
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#define HDLC_STAT_RML_MASK_V2 0x7f00
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#define HDLC_CMD_XRS 0x80
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#define HDLC_CMD_XME 0x01
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#define HDLC_CMD_RRS 0x20
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#define HDLC_CMD_XML_MASK 0x3f00
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#define HDLC_FIFO_SIZE_V1 32
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#define HDLC_FIFO_SIZE_V2 128
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/* Fritz PCI v2.0 */
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#define AVM_HDLC_FIFO_1 0x10
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#define AVM_HDLC_FIFO_2 0x18
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#define AVM_HDLC_STATUS_1 0x14
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#define AVM_HDLC_STATUS_2 0x1c
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#define AVM_ISACX_INDEX 0x04
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#define AVM_ISACX_DATA 0x08
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/* data struct */
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#define LOG_SIZE 63
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struct hdlc_stat_reg {
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#ifdef __BIG_ENDIAN
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u8 fill;
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u8 mode;
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u8 xml;
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u8 cmd;
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#else
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u8 cmd;
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u8 xml;
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u8 mode;
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u8 fill;
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#endif
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} __attribute__((packed));
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struct hdlc_hw {
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union {
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u32 ctrl;
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struct hdlc_stat_reg sr;
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} ctrl;
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u32 stat;
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};
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struct fritzcard {
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struct list_head list;
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struct pci_dev *pdev;
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char name[MISDN_MAX_IDLEN];
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u8 type;
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u8 ctrlreg;
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u16 irq;
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u32 irqcnt;
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u32 addr;
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spinlock_t lock; /* hw lock */
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struct isac_hw isac;
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struct hdlc_hw hdlc[2];
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struct bchannel bch[2];
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char log[LOG_SIZE + 1];
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};
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static LIST_HEAD(Cards);
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static DEFINE_RWLOCK(card_lock); /* protect Cards */
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static void
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_set_debug(struct fritzcard *card)
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{
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card->isac.dch.debug = debug;
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card->bch[0].debug = debug;
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card->bch[1].debug = debug;
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}
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static int
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set_debug(const char *val, const struct kernel_param *kp)
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{
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int ret;
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struct fritzcard *card;
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ret = param_set_uint(val, kp);
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if (!ret) {
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read_lock(&card_lock);
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list_for_each_entry(card, &Cards, list)
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_set_debug(card);
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read_unlock(&card_lock);
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}
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return ret;
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}
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MODULE_AUTHOR("Karsten Keil");
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MODULE_LICENSE("GPL v2");
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MODULE_VERSION(AVMFRITZ_REV);
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module_param_call(debug, set_debug, param_get_uint, &debug, S_IRUGO | S_IWUSR);
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MODULE_PARM_DESC(debug, "avmfritz debug mask");
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/* Interface functions */
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static u8
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ReadISAC_V1(void *p, u8 offset)
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{
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struct fritzcard *fc = p;
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u8 idx = (offset > 0x2f) ? AVM_ISAC_REG_HIGH : AVM_ISAC_REG_LOW;
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outb(idx, fc->addr + CHIP_INDEX);
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return inb(fc->addr + CHIP_WINDOW + (offset & 0xf));
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}
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static void
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WriteISAC_V1(void *p, u8 offset, u8 value)
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{
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struct fritzcard *fc = p;
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u8 idx = (offset > 0x2f) ? AVM_ISAC_REG_HIGH : AVM_ISAC_REG_LOW;
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outb(idx, fc->addr + CHIP_INDEX);
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outb(value, fc->addr + CHIP_WINDOW + (offset & 0xf));
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}
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static void
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ReadFiFoISAC_V1(void *p, u8 off, u8 *data, int size)
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{
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struct fritzcard *fc = p;
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outb(AVM_ISAC_FIFO, fc->addr + CHIP_INDEX);
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insb(fc->addr + CHIP_WINDOW, data, size);
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}
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static void
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WriteFiFoISAC_V1(void *p, u8 off, u8 *data, int size)
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{
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struct fritzcard *fc = p;
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outb(AVM_ISAC_FIFO, fc->addr + CHIP_INDEX);
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outsb(fc->addr + CHIP_WINDOW, data, size);
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}
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static u8
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ReadISAC_V2(void *p, u8 offset)
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{
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struct fritzcard *fc = p;
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outl(offset, fc->addr + AVM_ISACX_INDEX);
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return 0xff & inl(fc->addr + AVM_ISACX_DATA);
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}
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static void
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WriteISAC_V2(void *p, u8 offset, u8 value)
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{
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struct fritzcard *fc = p;
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outl(offset, fc->addr + AVM_ISACX_INDEX);
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outl(value, fc->addr + AVM_ISACX_DATA);
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}
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static void
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ReadFiFoISAC_V2(void *p, u8 off, u8 *data, int size)
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{
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struct fritzcard *fc = p;
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int i;
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outl(off, fc->addr + AVM_ISACX_INDEX);
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for (i = 0; i < size; i++)
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data[i] = 0xff & inl(fc->addr + AVM_ISACX_DATA);
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}
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static void
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WriteFiFoISAC_V2(void *p, u8 off, u8 *data, int size)
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{
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struct fritzcard *fc = p;
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int i;
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outl(off, fc->addr + AVM_ISACX_INDEX);
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for (i = 0; i < size; i++)
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outl(data[i], fc->addr + AVM_ISACX_DATA);
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}
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static struct bchannel *
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Sel_BCS(struct fritzcard *fc, u32 channel)
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{
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if (test_bit(FLG_ACTIVE, &fc->bch[0].Flags) &&
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(fc->bch[0].nr & channel))
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return &fc->bch[0];
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else if (test_bit(FLG_ACTIVE, &fc->bch[1].Flags) &&
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(fc->bch[1].nr & channel))
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return &fc->bch[1];
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else
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return NULL;
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}
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static inline void
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__write_ctrl_pci(struct fritzcard *fc, struct hdlc_hw *hdlc, u32 channel) {
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u32 idx = channel == 2 ? AVM_HDLC_2 : AVM_HDLC_1;
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outl(idx, fc->addr + CHIP_INDEX);
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outl(hdlc->ctrl.ctrl, fc->addr + CHIP_WINDOW + HDLC_STATUS);
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}
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static inline void
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__write_ctrl_pciv2(struct fritzcard *fc, struct hdlc_hw *hdlc, u32 channel) {
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outl(hdlc->ctrl.ctrl, fc->addr + (channel == 2 ? AVM_HDLC_STATUS_2 :
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AVM_HDLC_STATUS_1));
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}
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static void
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write_ctrl(struct bchannel *bch, int which) {
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struct fritzcard *fc = bch->hw;
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struct hdlc_hw *hdlc;
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hdlc = &fc->hdlc[(bch->nr - 1) & 1];
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pr_debug("%s: hdlc %c wr%x ctrl %x\n", fc->name, '@' + bch->nr,
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which, hdlc->ctrl.ctrl);
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switch (fc->type) {
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case AVM_FRITZ_PCIV2:
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__write_ctrl_pciv2(fc, hdlc, bch->nr);
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break;
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case AVM_FRITZ_PCI:
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__write_ctrl_pci(fc, hdlc, bch->nr);
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break;
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}
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}
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static inline u32
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__read_status_pci(u_long addr, u32 channel)
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{
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outl(channel == 2 ? AVM_HDLC_2 : AVM_HDLC_1, addr + CHIP_INDEX);
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return inl(addr + CHIP_WINDOW + HDLC_STATUS);
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}
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static inline u32
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__read_status_pciv2(u_long addr, u32 channel)
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{
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return inl(addr + (channel == 2 ? AVM_HDLC_STATUS_2 :
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AVM_HDLC_STATUS_1));
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}
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static u32
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read_status(struct fritzcard *fc, u32 channel)
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{
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switch (fc->type) {
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case AVM_FRITZ_PCIV2:
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return __read_status_pciv2(fc->addr, channel);
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case AVM_FRITZ_PCI:
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return __read_status_pci(fc->addr, channel);
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}
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/* dummy */
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return 0;
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}
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static void
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enable_hwirq(struct fritzcard *fc)
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{
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fc->ctrlreg |= AVM_STATUS0_ENA_IRQ;
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outb(fc->ctrlreg, fc->addr + 2);
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}
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static void
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disable_hwirq(struct fritzcard *fc)
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{
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fc->ctrlreg &= ~AVM_STATUS0_ENA_IRQ;
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outb(fc->ctrlreg, fc->addr + 2);
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}
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static int
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modehdlc(struct bchannel *bch, int protocol)
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{
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struct fritzcard *fc = bch->hw;
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struct hdlc_hw *hdlc;
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u8 mode;
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hdlc = &fc->hdlc[(bch->nr - 1) & 1];
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pr_debug("%s: hdlc %c protocol %x-->%x ch %d\n", fc->name,
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'@' + bch->nr, bch->state, protocol, bch->nr);
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hdlc->ctrl.ctrl = 0;
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mode = (fc->type == AVM_FRITZ_PCIV2) ? HDLC_FIFO_SIZE_128 : 0;
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switch (protocol) {
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case -1: /* used for init */
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bch->state = -1;
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fallthrough;
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case ISDN_P_NONE:
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if (bch->state == ISDN_P_NONE)
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break;
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hdlc->ctrl.sr.cmd = HDLC_CMD_XRS | HDLC_CMD_RRS;
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hdlc->ctrl.sr.mode = mode | HDLC_MODE_TRANS;
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write_ctrl(bch, 5);
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bch->state = ISDN_P_NONE;
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test_and_clear_bit(FLG_HDLC, &bch->Flags);
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test_and_clear_bit(FLG_TRANSPARENT, &bch->Flags);
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break;
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case ISDN_P_B_RAW:
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bch->state = protocol;
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hdlc->ctrl.sr.cmd = HDLC_CMD_XRS | HDLC_CMD_RRS;
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hdlc->ctrl.sr.mode = mode | HDLC_MODE_TRANS;
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write_ctrl(bch, 5);
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hdlc->ctrl.sr.cmd = HDLC_CMD_XRS;
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write_ctrl(bch, 1);
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hdlc->ctrl.sr.cmd = 0;
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test_and_set_bit(FLG_TRANSPARENT, &bch->Flags);
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break;
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case ISDN_P_B_HDLC:
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bch->state = protocol;
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hdlc->ctrl.sr.cmd = HDLC_CMD_XRS | HDLC_CMD_RRS;
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hdlc->ctrl.sr.mode = mode | HDLC_MODE_ITF_FLG;
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write_ctrl(bch, 5);
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hdlc->ctrl.sr.cmd = HDLC_CMD_XRS;
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write_ctrl(bch, 1);
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hdlc->ctrl.sr.cmd = 0;
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test_and_set_bit(FLG_HDLC, &bch->Flags);
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break;
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default:
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pr_info("%s: protocol not known %x\n", fc->name, protocol);
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return -ENOPROTOOPT;
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}
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return 0;
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}
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static void
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hdlc_empty_fifo(struct bchannel *bch, int count)
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{
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u32 *ptr;
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u8 *p;
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u32 val, addr;
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int cnt;
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struct fritzcard *fc = bch->hw;
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pr_debug("%s: %s %d\n", fc->name, __func__, count);
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if (test_bit(FLG_RX_OFF, &bch->Flags)) {
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p = NULL;
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bch->dropcnt += count;
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} else {
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cnt = bchannel_get_rxbuf(bch, count);
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if (cnt < 0) {
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pr_warn("%s.B%d: No bufferspace for %d bytes\n",
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fc->name, bch->nr, count);
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return;
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}
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p = skb_put(bch->rx_skb, count);
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}
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ptr = (u32 *)p;
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if (fc->type == AVM_FRITZ_PCIV2)
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addr = fc->addr + (bch->nr == 2 ?
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AVM_HDLC_FIFO_2 : AVM_HDLC_FIFO_1);
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else {
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addr = fc->addr + CHIP_WINDOW;
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outl(bch->nr == 2 ? AVM_HDLC_2 : AVM_HDLC_1, fc->addr);
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}
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cnt = 0;
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while (cnt < count) {
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val = le32_to_cpu(inl(addr));
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if (p) {
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put_unaligned(val, ptr);
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ptr++;
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}
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cnt += 4;
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}
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if (p && (debug & DEBUG_HW_BFIFO)) {
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snprintf(fc->log, LOG_SIZE, "B%1d-recv %s %d ",
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bch->nr, fc->name, count);
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print_hex_dump_bytes(fc->log, DUMP_PREFIX_OFFSET, p, count);
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}
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}
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static void
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hdlc_fill_fifo(struct bchannel *bch)
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{
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struct fritzcard *fc = bch->hw;
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struct hdlc_hw *hdlc;
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int count, fs, cnt = 0, idx;
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bool fillempty = false;
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u8 *p;
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u32 *ptr, val, addr;
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idx = (bch->nr - 1) & 1;
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hdlc = &fc->hdlc[idx];
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fs = (fc->type == AVM_FRITZ_PCIV2) ?
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HDLC_FIFO_SIZE_V2 : HDLC_FIFO_SIZE_V1;
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if (!bch->tx_skb) {
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if (!test_bit(FLG_TX_EMPTY, &bch->Flags))
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return;
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count = fs;
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p = bch->fill;
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fillempty = true;
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} else {
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count = bch->tx_skb->len - bch->tx_idx;
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if (count <= 0)
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return;
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p = bch->tx_skb->data + bch->tx_idx;
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}
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hdlc->ctrl.sr.cmd &= ~HDLC_CMD_XME;
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if (count > fs) {
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count = fs;
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} else {
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if (test_bit(FLG_HDLC, &bch->Flags))
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hdlc->ctrl.sr.cmd |= HDLC_CMD_XME;
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}
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ptr = (u32 *)p;
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if (!fillempty) {
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pr_debug("%s.B%d: %d/%d/%d", fc->name, bch->nr, count,
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bch->tx_idx, bch->tx_skb->len);
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bch->tx_idx += count;
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} else {
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pr_debug("%s.B%d: fillempty %d\n", fc->name, bch->nr, count);
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}
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hdlc->ctrl.sr.xml = ((count == fs) ? 0 : count);
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if (fc->type == AVM_FRITZ_PCIV2) {
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|
__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);
|