xref: /linux/drivers/media/pci/mantis/mantis_ca.c (revision c4ee0af3fa0dc65f690fc908f02b8355f9576ea0)
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/signal.h>
22 #include <linux/slab.h>
23 #include <linux/sched.h>
24 #include <linux/interrupt.h>
25 #include <asm/io.h>
26 
27 #include "dmxdev.h"
28 #include "dvbdev.h"
29 #include "dvb_demux.h"
30 #include "dvb_frontend.h"
31 #include "dvb_net.h"
32 
33 #include "mantis_common.h"
34 #include "mantis_link.h"
35 #include "mantis_hif.h"
36 #include "mantis_reg.h"
37 
38 #include "mantis_ca.h"
39 
40 static int mantis_ca_read_attr_mem(struct dvb_ca_en50221 *en50221, int slot, int addr)
41 {
42 	struct mantis_ca *ca = en50221->data;
43 	struct mantis_pci *mantis = ca->ca_priv;
44 
45 	dprintk(MANTIS_DEBUG, 1, "Slot(%d): Request Attribute Mem Read", slot);
46 
47 	if (slot != 0)
48 		return -EINVAL;
49 
50 	return mantis_hif_read_mem(ca, addr);
51 }
52 
53 static int mantis_ca_write_attr_mem(struct dvb_ca_en50221 *en50221, int slot, int addr, u8 data)
54 {
55 	struct mantis_ca *ca = en50221->data;
56 	struct mantis_pci *mantis = ca->ca_priv;
57 
58 	dprintk(MANTIS_DEBUG, 1, "Slot(%d): Request Attribute Mem Write", slot);
59 
60 	if (slot != 0)
61 		return -EINVAL;
62 
63 	return mantis_hif_write_mem(ca, addr, data);
64 }
65 
66 static int mantis_ca_read_cam_ctl(struct dvb_ca_en50221 *en50221, int slot, u8 addr)
67 {
68 	struct mantis_ca *ca = en50221->data;
69 	struct mantis_pci *mantis = ca->ca_priv;
70 
71 	dprintk(MANTIS_DEBUG, 1, "Slot(%d): Request CAM control Read", slot);
72 
73 	if (slot != 0)
74 		return -EINVAL;
75 
76 	return mantis_hif_read_iom(ca, addr);
77 }
78 
79 static int mantis_ca_write_cam_ctl(struct dvb_ca_en50221 *en50221, int slot, u8 addr, u8 data)
80 {
81 	struct mantis_ca *ca = en50221->data;
82 	struct mantis_pci *mantis = ca->ca_priv;
83 
84 	dprintk(MANTIS_DEBUG, 1, "Slot(%d): Request CAM control Write", slot);
85 
86 	if (slot != 0)
87 		return -EINVAL;
88 
89 	return mantis_hif_write_iom(ca, addr, data);
90 }
91 
92 static int mantis_ca_slot_reset(struct dvb_ca_en50221 *en50221, int slot)
93 {
94 	struct mantis_ca *ca = en50221->data;
95 	struct mantis_pci *mantis = ca->ca_priv;
96 
97 	dprintk(MANTIS_DEBUG, 1, "Slot(%d): Slot RESET", slot);
98 	udelay(500); /* Wait.. */
99 	mmwrite(0xda, MANTIS_PCMCIA_RESET); /* Leading edge assert */
100 	udelay(500);
101 	mmwrite(0x00, MANTIS_PCMCIA_RESET); /* Trailing edge deassert */
102 	msleep(1000);
103 	dvb_ca_en50221_camready_irq(&ca->en50221, 0);
104 
105 	return 0;
106 }
107 
108 static int mantis_ca_slot_shutdown(struct dvb_ca_en50221 *en50221, int slot)
109 {
110 	struct mantis_ca *ca = en50221->data;
111 	struct mantis_pci *mantis = ca->ca_priv;
112 
113 	dprintk(MANTIS_DEBUG, 1, "Slot(%d): Slot shutdown", slot);
114 
115 	return 0;
116 }
117 
118 static int mantis_ts_control(struct dvb_ca_en50221 *en50221, int slot)
119 {
120 	struct mantis_ca *ca = en50221->data;
121 	struct mantis_pci *mantis = ca->ca_priv;
122 
123 	dprintk(MANTIS_DEBUG, 1, "Slot(%d): TS control", slot);
124 /*	mantis_set_direction(mantis, 1); */ /* Enable TS through CAM */
125 
126 	return 0;
127 }
128 
129 static int mantis_slot_status(struct dvb_ca_en50221 *en50221, int slot, int open)
130 {
131 	struct mantis_ca *ca = en50221->data;
132 	struct mantis_pci *mantis = ca->ca_priv;
133 
134 	dprintk(MANTIS_DEBUG, 1, "Slot(%d): Poll Slot status", slot);
135 
136 	if (ca->slot_state == MODULE_INSERTED) {
137 		dprintk(MANTIS_DEBUG, 1, "CA Module present and ready");
138 		return DVB_CA_EN50221_POLL_CAM_PRESENT | DVB_CA_EN50221_POLL_CAM_READY;
139 	} else {
140 		dprintk(MANTIS_DEBUG, 1, "CA Module not present or not ready");
141 	}
142 
143 	return 0;
144 }
145 
146 int mantis_ca_init(struct mantis_pci *mantis)
147 {
148 	struct dvb_adapter *dvb_adapter	= &mantis->dvb_adapter;
149 	struct mantis_ca *ca;
150 	int ca_flags = 0, result;
151 
152 	dprintk(MANTIS_DEBUG, 1, "Initializing Mantis CA");
153 	ca = kzalloc(sizeof(struct mantis_ca), GFP_KERNEL);
154 	if (!ca) {
155 		dprintk(MANTIS_ERROR, 1, "Out of memory!, exiting ..");
156 		result = -ENOMEM;
157 		goto err;
158 	}
159 
160 	ca->ca_priv		= mantis;
161 	mantis->mantis_ca	= ca;
162 	ca_flags		= DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE;
163 	/* register CA interface */
164 	ca->en50221.owner		= THIS_MODULE;
165 	ca->en50221.read_attribute_mem	= mantis_ca_read_attr_mem;
166 	ca->en50221.write_attribute_mem	= mantis_ca_write_attr_mem;
167 	ca->en50221.read_cam_control	= mantis_ca_read_cam_ctl;
168 	ca->en50221.write_cam_control	= mantis_ca_write_cam_ctl;
169 	ca->en50221.slot_reset		= mantis_ca_slot_reset;
170 	ca->en50221.slot_shutdown	= mantis_ca_slot_shutdown;
171 	ca->en50221.slot_ts_enable	= mantis_ts_control;
172 	ca->en50221.poll_slot_status	= mantis_slot_status;
173 	ca->en50221.data		= ca;
174 
175 	mutex_init(&ca->ca_lock);
176 
177 	init_waitqueue_head(&ca->hif_data_wq);
178 	init_waitqueue_head(&ca->hif_opdone_wq);
179 	init_waitqueue_head(&ca->hif_write_wq);
180 
181 	dprintk(MANTIS_ERROR, 1, "Registering EN50221 device");
182 	result = dvb_ca_en50221_init(dvb_adapter, &ca->en50221, ca_flags, 1);
183 	if (result != 0) {
184 		dprintk(MANTIS_ERROR, 1, "EN50221: Initialization failed <%d>", result);
185 		goto err;
186 	}
187 	dprintk(MANTIS_ERROR, 1, "Registered EN50221 device");
188 	mantis_evmgr_init(ca);
189 	return 0;
190 err:
191 	kfree(ca);
192 	return result;
193 }
194 EXPORT_SYMBOL_GPL(mantis_ca_init);
195 
196 void mantis_ca_exit(struct mantis_pci *mantis)
197 {
198 	struct mantis_ca *ca = mantis->mantis_ca;
199 
200 	dprintk(MANTIS_DEBUG, 1, "Mantis CA exit");
201 	if (!ca)
202 		return;
203 
204 	mantis_evmgr_exit(ca);
205 	dprintk(MANTIS_ERROR, 1, "Unregistering EN50221 device");
206 	dvb_ca_en50221_release(&ca->en50221);
207 
208 	kfree(ca);
209 }
210 EXPORT_SYMBOL_GPL(mantis_ca_exit);
211