[mISDN PATCH v2 01/19] Add watchdog functionality to hfcmulti driver

From: Karsten Keil
Date: Fri May 22 2009 - 17:05:20 EST


From: Andreas Eversberg <andreas@xxxxxxxxxxxx>

This patch was made by Titus Moldovan and provides IOCTL functions for enabling
and disabling the controller's built in watchdog. The use is optional.

Signed-off-by: Andreas Eversberg <andreas@xxxxxxxxxxxx>
Signed-off-by: Karsten Keil <keil@xxxxxxxxxxxxx>
---
drivers/isdn/hardware/mISDN/hfc_multi.h | 1 +
drivers/isdn/hardware/mISDN/hfcmulti.c | 32 ++++++++++++++++++++++++++++++-
include/linux/mISDNif.h | 3 +-
3 files changed, 34 insertions(+), 2 deletions(-)

diff --git a/drivers/isdn/hardware/mISDN/hfc_multi.h b/drivers/isdn/hardware/mISDN/hfc_multi.h
index 663b77f..5765e19 100644
--- a/drivers/isdn/hardware/mISDN/hfc_multi.h
+++ b/drivers/isdn/hardware/mISDN/hfc_multi.h
@@ -62,6 +62,7 @@ struct hfcm_hw {
u_char r_sci_msk;
u_char r_tx0, r_tx1;
u_char a_st_ctrl0[8];
+ u_char r_bert_wd_md;
timer_t timer;
};

diff --git a/drivers/isdn/hardware/mISDN/hfcmulti.c b/drivers/isdn/hardware/mISDN/hfcmulti.c
index 0b28141..ca153de 100644
--- a/drivers/isdn/hardware/mISDN/hfcmulti.c
+++ b/drivers/isdn/hardware/mISDN/hfcmulti.c
@@ -4013,11 +4013,41 @@ open_bchannel(struct hfc_multi *hc, struct dchannel *dch,
static int
channel_dctrl(struct dchannel *dch, struct mISDN_ctrl_req *cq)
{
+ struct hfc_multi *hc = dch->hw;
int ret = 0;
+ int wd_mode, wd_cnt;

switch (cq->op) {
case MISDN_CTRL_GETOP:
- cq->op = 0;
+ cq->op = MISDN_CTRL_HFC_OP;
+ break;
+ case MISDN_CTRL_HFC_WD_INIT: /* init the watchdog */
+ wd_cnt = cq->p1 & 0xf;
+ wd_mode = !!(cq->p1 >> 4);
+ if (debug & DEBUG_HFCMULTI_MSG)
+ printk(KERN_DEBUG
+ "%s: MISDN_CTRL_HFC_WD_INIT mode %s counter 0x%x\n",
+ __func__, wd_mode ? "AUTO" : "MANUAL", wd_cnt);
+ /* set the watchdog timer */
+ HFC_outb(hc, R_TI_WD, poll_timer | (wd_cnt << 4));
+ hc->hw.r_bert_wd_md = (wd_mode ? V_AUTO_WD_RES : 0);
+ if (hc->ctype == HFC_TYPE_XHFC)
+ hc->hw.r_bert_wd_md |= 0x40 /* V_WD_EN */;
+ /* init the watchdog register and reset the counter */
+ HFC_outb(hc, R_BERT_WD_MD, hc->hw.r_bert_wd_md | V_WD_RES);
+ if (test_bit(HFC_CHIP_PLXSD, &hc->chip)) {
+ /* enable the watchdog output for Speech-Design */
+ HFC_outb(hc, R_GPIO_SEL, V_GPIO_SEL7);
+ HFC_outb(hc, R_GPIO_EN1, V_GPIO_EN15);
+ HFC_outb(hc, R_GPIO_OUT1, 0);
+ HFC_outb(hc, R_GPIO_OUT1, V_GPIO_OUT15);
+ }
+ break;
+ case MISDN_CTRL_HFC_WD_RESET: /* reset the watchdog counter */
+ if (debug & DEBUG_HFCMULTI_MSG)
+ printk(KERN_DEBUG "%s: MISDN_CTRL_HFC_WD_RESET\n",
+ __func__);
+ HFC_outb(hc, R_BERT_WD_MD, hc->hw.r_bert_wd_md | V_WD_RES);
break;
default:
printk(KERN_WARNING "%s: unknown Op %x\n",
diff --git a/include/linux/mISDNif.h b/include/linux/mISDNif.h
index 5da3d95..cf97459 100644
--- a/include/linux/mISDNif.h
+++ b/include/linux/mISDNif.h
@@ -362,7 +362,8 @@ clear_channelmap(u_int nr, u_char *map)
#define MISDN_CTRL_HFC_RECEIVE_ON 0x4006
#define MISDN_CTRL_HFC_ECHOCAN_ON 0x4007
#define MISDN_CTRL_HFC_ECHOCAN_OFF 0x4008
-
+#define MISDN_CTRL_HFC_WD_INIT 0x4009
+#define MISDN_CTRL_HFC_WD_RESET 0x400A

/* socket options */
#define MISDN_TIME_STAMP 0x0001
--
1.6.0.2

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