mantis_pcmcia.c

  1// SPDX-License-Identifier: GPL-2.0-or-later
  2/*
  3	Mantis PCI bridge driver
  4
  5	Copyright (C) Manu Abraham (abraham.manu@gmail.com)
  6
  7*/
  8
  9#include <linux/kernel.h>
 10
 11#include <linux/signal.h>
 12#include <linux/sched.h>
 13#include <linux/interrupt.h>
 14#include <asm/io.h>
 15
 16#include <media/dmxdev.h>
 17#include <media/dvbdev.h>
 18#include <media/dvb_demux.h>
 19#include <media/dvb_frontend.h>
 20#include <media/dvb_net.h>
 21
 22#include "mantis_common.h"
 23#include "mantis_link.h" /* temporary due to physical layer stuff */
 24#include "mantis_reg.h"
 25
 26/*
 27 * If Slot state is already PLUG_IN event and we are called
 28 * again, definitely it is jitter alone
 29 */
 30void mantis_event_cam_plugin(struct mantis_ca *ca)
 31{
 32	struct mantis_pci *mantis = ca->ca_priv;
 33
 34	u32 gpif_irqcfg;
 35
 36	if (ca->slot_state == MODULE_XTRACTED) {
 37		dprintk(MANTIS_DEBUG, 1, "Event: CAM Plugged IN: Adapter(%d) Slot(0)", mantis->num);
 38		udelay(50);
 39		mmwrite(0xda000000, MANTIS_CARD_RESET);
 40		gpif_irqcfg  = mmread(MANTIS_GPIF_IRQCFG);
 41		gpif_irqcfg |= MANTIS_MASK_PLUGOUT;
 42		gpif_irqcfg &= ~MANTIS_MASK_PLUGIN;
 43		mmwrite(gpif_irqcfg, MANTIS_GPIF_IRQCFG);
 44		udelay(500);
 45		ca->slot_state = MODULE_INSERTED;
 46	}
 47	udelay(100);
 48}
 49
 50/*
 51 * If Slot state is already UN_PLUG event and we are called
 52 * again, definitely it is jitter alone
 53 */
 54void mantis_event_cam_unplug(struct mantis_ca *ca)
 55{
 56	struct mantis_pci *mantis = ca->ca_priv;
 57
 58	u32 gpif_irqcfg;
 59
 60	if (ca->slot_state == MODULE_INSERTED) {
 61		dprintk(MANTIS_DEBUG, 1, "Event: CAM Unplugged: Adapter(%d) Slot(0)", mantis->num);
 62		udelay(50);
 63		mmwrite(0x00da0000, MANTIS_CARD_RESET);
 64		gpif_irqcfg  = mmread(MANTIS_GPIF_IRQCFG);
 65		gpif_irqcfg |= MANTIS_MASK_PLUGIN;
 66		gpif_irqcfg &= ~MANTIS_MASK_PLUGOUT;
 67		mmwrite(gpif_irqcfg, MANTIS_GPIF_IRQCFG);
 68		udelay(500);
 69		ca->slot_state = MODULE_XTRACTED;
 70	}
 71	udelay(100);
 72}
 73
 74int mantis_pcmcia_init(struct mantis_ca *ca)
 75{
 76	struct mantis_pci *mantis = ca->ca_priv;
 77
 78	u32 gpif_stat, card_stat;
 79
 80	mantis_unmask_ints(mantis, MANTIS_INT_IRQ0);
 81	gpif_stat = mmread(MANTIS_GPIF_STATUS);
 82	card_stat = mmread(MANTIS_GPIF_IRQCFG);
 83
 84	if (gpif_stat & MANTIS_GPIF_DETSTAT) {
 85		dprintk(MANTIS_DEBUG, 1, "CAM found on Adapter(%d) Slot(0)", mantis->num);
 86		mmwrite(card_stat | MANTIS_MASK_PLUGOUT, MANTIS_GPIF_IRQCFG);
 87		ca->slot_state = MODULE_INSERTED;
 88		dvb_ca_en50221_camchange_irq(&ca->en50221,
 89					     0,
 90					     DVB_CA_EN50221_CAMCHANGE_INSERTED);
 91	} else {
 92		dprintk(MANTIS_DEBUG, 1, "Empty Slot on Adapter(%d) Slot(0)", mantis->num);
 93		mmwrite(card_stat | MANTIS_MASK_PLUGIN, MANTIS_GPIF_IRQCFG);
 94		ca->slot_state = MODULE_XTRACTED;
 95		dvb_ca_en50221_camchange_irq(&ca->en50221,
 96					     0,
 97					     DVB_CA_EN50221_CAMCHANGE_REMOVED);
 98	}
 99
100	return 0;
101}
102
103void mantis_pcmcia_exit(struct mantis_ca *ca)
104{
105	struct mantis_pci *mantis = ca->ca_priv;
106
107	mmwrite(mmread(MANTIS_GPIF_STATUS) & (~MANTIS_CARD_PLUGOUT | ~MANTIS_CARD_PLUGIN), MANTIS_GPIF_STATUS);
108	mantis_mask_ints(mantis, MANTIS_INT_IRQ0);
109}