V4L/DVB (13736): [Mantis] Implement CAM Plug IN and Unplug events

Sigh! how i wish things were simpler ...
Signed-off-by: Manu Abraham <manu@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/dvb/mantis/mantis_link.h

@@ -31,6 +31,12 @@ struct mantis_slot {
 	u32				timeout;
 };
 
+/* Physical layer */
+enum mantis_slot_state {
+	MODULE_INSERTED			= 3,
+	MODULE_XTRACTED			= 4
+};
+
 struct mantis_ca {
 	struct mantis_slot		slot;
 
@@ -44,6 +50,8 @@ struct mantis_ca {
 
 	enum mantis_sbuf_status		sbuf_status;
 
+	enum mantis_slot_state		slot_state;
+
 	struct dvb_device		*ca_dev;
 	void				*ca_priv;
 };

drivers/media/dvb/mantis/mantis_pcmcia.c

@@ -19,11 +19,75 @@
 */
 
 #include "mantis_common.h"
+#include "mantis_link.h" /* temporary due to physical layer stuff */
+
+/*
+ * If Slot state is already PLUG_IN event and we are called
+ * again, definitely it is jitter alone
+ */
+void mantis_event_cam_plugin(struct mantis_ca *ca)
+{
+	struct mantis_pci *mantis = ca->ca_priv;
+
+	u32 gpif_irqcfg;
+
+	if (ca->slot_state == MODULE_XTRACTED) {
+		dprintk(mantis->verbose, MANTIS_DEBUG, 1, "Event: CAM Plugged IN: Adapter(%d) Slot(0)", mantis->num);
+		udelay(50);
+		mmwrite(0xda000000, MANTIS_CARD_RESET);
+		gpif_irqcfg  = mmread(MANTIS_GPIF_IRQCFG);
+		gpif_irqcfg |= MANTIS_MASK_PLUGOUT;
+		gpif_irqcfg &= ~MANTIS_MASK_PLUGIN;
+		mmwrite(gpif_irqcfg, MANTIS_GPIF_IRQCFG);
+		udelay(500);
+		ca->slot_state = MODULE_INSERTED;
+	}
+	udelay(100);
+}
+
+/*
+ * If Slot state is already UN_PLUG event and we are called
+ * again, definitely it is jitter alone
+ */
+void mantis_event_cam_unplug(struct mantis_ca *ca)
+{
+	struct mantis_pci *mantis = ca->ca_priv;
+
+	u32 gpif_irqcfg;
+
+	if (ca->slot_state == MODULE_INSERTED) {
+		dprintk(mantis->verbose, MANTIS_DEBUG, 1, "Event: CAM Unplugged: Adapter(%d) Slot(0)", mantis->num);
+		udelay(50);
+		mmwrite(0x00da0000, MANTIS_CARD_RESET);
+		gpif_irqcfg  = mmread(MANTIS_GPIF_IRQCFG);
+		gpif_irqcfg |= MANTIS_MASK_PLUGIN;
+		gpif_irqcfg &= ~MANTIS_MASK_PLUGOUT;
+		mmwrite(gpif_irqcfg, MANTIS_GPIF_IRQCFG);
+		udelay(500);
+		ca->slot_state = MODULE_XTRACTED;
+	}
+	udelay(100);
+}
 
 int mantis_pcmcia_init(struct mantis_ca *ca)
 {
 	struct mantis_pci *mantis = ca->ca_priv;
 
+	u32 gpif_stat, card_stat;
+
+	gpif_stat = mmread(MANTIS_GPIF_STATUS);
+	card_stat = mmread(MANTIS_GPIF_IRQCFG);
+
+	if (gpif_stat & MANTIS_GPIF_DETSTAT) {
+		dprintk(mantis->verbose, MANTIS_DEBUG, 1, "CAM found on Adapter(%d) Slot(0)", mantis->num);
+		mmwrite(card_stat | MANTIS_MASK_PLUGOUT, MANTIS_GPIF_IRQCFG);
+		ca->slot_state = MODULE_INSERTED;
+	} else {
+		dprintk(mantis->verbose, MANTIS_DEBUG, 1, "Empty Slot on Adapter(%d) Slot(0)", mantis->num);
+		mmwrite(card_stat | MANTIS_MASK_PLUGIN, MANTIS_GPIF_IRQCFG);
+		ca->slot_state = MODULE_XTRACTED;
+	}
+
 	return 0;
 }
 
@@ -31,4 +95,6 @@ void mantis_pcmcia_exit(struct mantis_ca *ca)
 {
 	struct mantis_pci *mantis = ca->ca_priv;
 
+	mmwrite(mmread(MANTIS_GPIF_STATUS) & (~MANTIS_CARD_PLUGOUT | ~MANTIS_CARD_PLUGIN), MANTIS_GPIF_STATUS);
+	mmwrite(mmread(MANTIS_INT_MASK) & ~MANTIS_INT_IRQ0, MANTIS_INT_MASK);
 }