1 /*
2 	Mantis PCI bridge driver
3 
4 	Copyright (C) Manu Abraham (abraham.manu@gmail.com)
5 
6 	This program is free software; you can redistribute it and/or modify
7 	it under the terms of the GNU General Public License as published by
8 	the Free Software Foundation; either version 2 of the License, or
9 	(at your option) any later version.
10 
11 	This program is distributed in the hope that it will be useful,
12 	but WITHOUT ANY WARRANTY; without even the implied warranty of
13 	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14 	GNU General Public License for more details.
15 
16 	You should have received a copy of the GNU General Public License
17 	along with this program; if not, write to the Free Software
18 	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19 */
20 
21 #include <linux/kernel.h>
22 
23 #include <linux/signal.h>
24 #include <linux/sched.h>
25 #include <linux/interrupt.h>
26 #include <asm/io.h>
27 
28 #include "dmxdev.h"
29 #include "dvbdev.h"
30 #include "dvb_demux.h"
31 #include "dvb_frontend.h"
32 #include "dvb_net.h"
33 
34 #include "mantis_common.h"
35 #include "mantis_link.h" /* temporary due to physical layer stuff */
36 #include "mantis_reg.h"
37 
38 /*
39  * If Slot state is already PLUG_IN event and we are called
40  * again, definitely it is jitter alone
41  */
42 void mantis_event_cam_plugin(struct mantis_ca *ca)
43 {
44 	struct mantis_pci *mantis = ca->ca_priv;
45 
46 	u32 gpif_irqcfg;
47 
48 	if (ca->slot_state == MODULE_XTRACTED) {
49 		dprintk(MANTIS_DEBUG, 1, "Event: CAM Plugged IN: Adapter(%d) Slot(0)", mantis->num);
50 		udelay(50);
51 		mmwrite(0xda000000, MANTIS_CARD_RESET);
52 		gpif_irqcfg  = mmread(MANTIS_GPIF_IRQCFG);
53 		gpif_irqcfg |= MANTIS_MASK_PLUGOUT;
54 		gpif_irqcfg &= ~MANTIS_MASK_PLUGIN;
55 		mmwrite(gpif_irqcfg, MANTIS_GPIF_IRQCFG);
56 		udelay(500);
57 		ca->slot_state = MODULE_INSERTED;
58 	}
59 	udelay(100);
60 }
61 
62 /*
63  * If Slot state is already UN_PLUG event and we are called
64  * again, definitely it is jitter alone
65  */
66 void mantis_event_cam_unplug(struct mantis_ca *ca)
67 {
68 	struct mantis_pci *mantis = ca->ca_priv;
69 
70 	u32 gpif_irqcfg;
71 
72 	if (ca->slot_state == MODULE_INSERTED) {
73 		dprintk(MANTIS_DEBUG, 1, "Event: CAM Unplugged: Adapter(%d) Slot(0)", mantis->num);
74 		udelay(50);
75 		mmwrite(0x00da0000, MANTIS_CARD_RESET);
76 		gpif_irqcfg  = mmread(MANTIS_GPIF_IRQCFG);
77 		gpif_irqcfg |= MANTIS_MASK_PLUGIN;
78 		gpif_irqcfg &= ~MANTIS_MASK_PLUGOUT;
79 		mmwrite(gpif_irqcfg, MANTIS_GPIF_IRQCFG);
80 		udelay(500);
81 		ca->slot_state = MODULE_XTRACTED;
82 	}
83 	udelay(100);
84 }
85 
86 int mantis_pcmcia_init(struct mantis_ca *ca)
87 {
88 	struct mantis_pci *mantis = ca->ca_priv;
89 
90 	u32 gpif_stat, card_stat;
91 
92 	mmwrite(mmread(MANTIS_INT_MASK) | MANTIS_INT_IRQ0, MANTIS_INT_MASK);
93 	gpif_stat = mmread(MANTIS_GPIF_STATUS);
94 	card_stat = mmread(MANTIS_GPIF_IRQCFG);
95 
96 	if (gpif_stat & MANTIS_GPIF_DETSTAT) {
97 		dprintk(MANTIS_DEBUG, 1, "CAM found on Adapter(%d) Slot(0)", mantis->num);
98 		mmwrite(card_stat | MANTIS_MASK_PLUGOUT, MANTIS_GPIF_IRQCFG);
99 		ca->slot_state = MODULE_INSERTED;
100 		dvb_ca_en50221_camchange_irq(&ca->en50221,
101 					     0,
102 					     DVB_CA_EN50221_CAMCHANGE_INSERTED);
103 	} else {
104 		dprintk(MANTIS_DEBUG, 1, "Empty Slot on Adapter(%d) Slot(0)", mantis->num);
105 		mmwrite(card_stat | MANTIS_MASK_PLUGIN, MANTIS_GPIF_IRQCFG);
106 		ca->slot_state = MODULE_XTRACTED;
107 		dvb_ca_en50221_camchange_irq(&ca->en50221,
108 					     0,
109 					     DVB_CA_EN50221_CAMCHANGE_REMOVED);
110 	}
111 
112 	return 0;
113 }
114 
115 void mantis_pcmcia_exit(struct mantis_ca *ca)
116 {
117 	struct mantis_pci *mantis = ca->ca_priv;
118 
119 	mmwrite(mmread(MANTIS_GPIF_STATUS) & (~MANTIS_CARD_PLUGOUT | ~MANTIS_CARD_PLUGIN), MANTIS_GPIF_STATUS);
120 	mmwrite(mmread(MANTIS_INT_MASK) & ~MANTIS_INT_IRQ0, MANTIS_INT_MASK);
121 }
122