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}
110