mISDN: Add ISDN sample clock API to mISDN core

[linux-2.6-omap-h63xx.git] / drivers / isdn / hardware / mISDN / hfcmulti.c

diff --git a/drivers/isdn/hardware/mISDN/hfcmulti.c b/drivers/isdn/hardware/mISDN/hfcmulti.c
index 3fc2e9d953413f11ede05c82979ca57de2c10bc6..592db93105f957e1c98bb9addd198567ccdee21d 100644 (file)
--- a/drivers/isdn/hardware/mISDN/hfcmulti.c
+++ b/drivers/isdn/hardware/mISDN/hfcmulti.c
@@ -133,6 +133,12 @@
  *     Give the value of the clock control register (A_ST_CLK_DLY)
  *     of the S/T interfaces in TE mode.
  *     This register is needed for the TBR3 certification, so don't change it.
+ *
+ * clock:
+ *     NOTE: only one clockdelay_te value must be given once
+ *     Selects interface with clock source for mISDN and applications.
+ *     Set to card number starting with 1. Set to -1 to disable.
+ *     By default, the first card is used as clock source.
  */
 
 /*
@@ -190,12 +196,13 @@ static int nt_t1_count[] = { 3840, 1920, 960, 480, 240, 120, 60, 30  };
  */
 
 static uint    type[MAX_CARDS];
-static uint    pcm[MAX_CARDS];
-static uint    dslot[MAX_CARDS];
+static int     pcm[MAX_CARDS];
+static int     dslot[MAX_CARDS];
 static uint    iomode[MAX_CARDS];
 static uint    port[MAX_PORTS];
 static uint    debug;
 static uint    poll;
+static int     clock;
 static uint    timer;
 static uint    clockdelay_te = CLKDEL_TE;
 static uint    clockdelay_nt = CLKDEL_NT;
@@ -207,12 +214,13 @@ MODULE_LICENSE("GPL");
 MODULE_VERSION(HFC_MULTI_VERSION);
 module_param(debug, uint, S_IRUGO | S_IWUSR);
 module_param(poll, uint, S_IRUGO | S_IWUSR);
+module_param(clock, int, S_IRUGO | S_IWUSR);
 module_param(timer, uint, S_IRUGO | S_IWUSR);
 module_param(clockdelay_te, uint, S_IRUGO | S_IWUSR);
 module_param(clockdelay_nt, uint, S_IRUGO | S_IWUSR);
 module_param_array(type, uint, NULL, S_IRUGO | S_IWUSR);
-module_param_array(pcm, uint, NULL, S_IRUGO | S_IWUSR);
-module_param_array(dslot, uint, NULL, S_IRUGO | S_IWUSR);
+module_param_array(pcm, int, NULL, S_IRUGO | S_IWUSR);
+module_param_array(dslot, int, NULL, S_IRUGO | S_IWUSR);
 module_param_array(iomode, uint, NULL, S_IRUGO | S_IWUSR);
 module_param_array(port, uint, NULL, S_IRUGO | S_IWUSR);
 
@@ -2629,6 +2637,7 @@ hfcmulti_interrupt(int intno, void *dev_id)
                iqcnt = 0;
        }
 #endif
+
        if (!r_irq_statech &&
            !(status & (V_DTMF_STA | V_LOST_STA | V_EXT_IRQSTA |
            V_MISC_IRQSTA | V_FR_IRQSTA))) {
@@ -2683,11 +2692,13 @@ hfcmulti_interrupt(int intno, void *dev_id)
                                        plxsd_checksync(hc, 0);
                        }
                }
-               if (r_irq_misc & V_TI_IRQ)
+               if (r_irq_misc & V_TI_IRQ) {
+                       if (hc->iclock_on)
+                               mISDN_clock_update(hc->iclock, poll, NULL);
                        handle_timer_irq(hc);
+               }
 
                if (r_irq_misc & V_DTMF_IRQ) {
-                       /* -> DTMF IRQ */
                        hfcmulti_dtmf(hc);
                }
                if (r_irq_misc & V_IRQ_PROC) {
@@ -4075,6 +4086,15 @@ hfcm_dctrl(struct mISDNchannel *ch, u_int cmd, void *arg)
        return err;
 }
 
+static int
+clockctl(void *priv, int enable)
+{
+       struct hfc_multi *hc = priv;
+
+       hc->iclock_on = enable;
+       return 0;
+}
+
 /*
  * initialize the card
  */
@@ -4489,10 +4509,14 @@ release_card(struct hfc_multi *hc)
                printk(KERN_WARNING "%s: release card (%d) entered\n",
                    __func__, hc->id);
 
+       /* unregister clock source */
+       if (hc->iclock)
+               mISDN_unregister_clock(hc->iclock);
+
+       /* disable irq */
        spin_lock_irqsave(&hc->lock, flags);
        disable_hwirq(hc);
        spin_unlock_irqrestore(&hc->lock, flags);
-
        udelay(1000);
 
        /* dimm leds */
@@ -5003,6 +5027,10 @@ hfcmulti_init(struct pci_dev *pdev, const struct pci_device_id *ent)
        list_add_tail(&hc->list, &HFClist);
        spin_unlock_irqrestore(&HFClock, flags);
 
+       /* use as clock source */
+       if (clock == HFC_cnt + 1)
+               hc->iclock = mISDN_register_clock("HFCMulti", 0, clockctl, hc);
+
        /* initialize hardware */
        ret_err = init_card(hc);
        if (ret_err) {
@@ -5273,6 +5301,9 @@ HFCmulti_init(void)
 
        }
 
+       if (!clock)
+               clock = 1;
+
        err = pci_register_driver(&hfcmultipci_driver);
        if (err < 0) {
                printk(KERN_ERR "error registering pci driver: %x\n", err);