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/signal.h>
10 #include <linux/slab.h>
11 #include <linux/sched.h>
12 #include <linux/interrupt.h>
13 #include <asm/io.h>
14
15 #include <media/dmxdev.h>
16 #include <media/dvbdev.h>
17 #include <media/dvb_demux.h>
18 #include <media/dvb_frontend.h>
19 #include <media/dvb_net.h>
20
21 #include "mantis_common.h"
22 #include "mantis_link.h"
23 #include "mantis_hif.h"
24 #include "mantis_reg.h"
25
26 #include "mantis_ca.h"
27
mantis_ca_read_attr_mem(struct dvb_ca_en50221 * en50221,int slot,int addr)28 static int mantis_ca_read_attr_mem(struct dvb_ca_en50221 *en50221, int slot, int addr)
29 {
30 struct mantis_ca *ca = en50221->data;
31 struct mantis_pci *mantis = ca->ca_priv;
32
33 dprintk(MANTIS_DEBUG, 1, "Slot(%d): Request Attribute Mem Read", slot);
34
35 if (slot != 0)
36 return -EINVAL;
37
38 return mantis_hif_read_mem(ca, addr);
39 }
40
mantis_ca_write_attr_mem(struct dvb_ca_en50221 * en50221,int slot,int addr,u8 data)41 static int mantis_ca_write_attr_mem(struct dvb_ca_en50221 *en50221, int slot, int addr, u8 data)
42 {
43 struct mantis_ca *ca = en50221->data;
44 struct mantis_pci *mantis = ca->ca_priv;
45
46 dprintk(MANTIS_DEBUG, 1, "Slot(%d): Request Attribute Mem Write", slot);
47
48 if (slot != 0)
49 return -EINVAL;
50
51 return mantis_hif_write_mem(ca, addr, data);
52 }
53
mantis_ca_read_cam_ctl(struct dvb_ca_en50221 * en50221,int slot,u8 addr)54 static int mantis_ca_read_cam_ctl(struct dvb_ca_en50221 *en50221, int slot, u8 addr)
55 {
56 struct mantis_ca *ca = en50221->data;
57 struct mantis_pci *mantis = ca->ca_priv;
58
59 dprintk(MANTIS_DEBUG, 1, "Slot(%d): Request CAM control Read", slot);
60
61 if (slot != 0)
62 return -EINVAL;
63
64 return mantis_hif_read_iom(ca, addr);
65 }
66
mantis_ca_write_cam_ctl(struct dvb_ca_en50221 * en50221,int slot,u8 addr,u8 data)67 static int mantis_ca_write_cam_ctl(struct dvb_ca_en50221 *en50221, int slot, u8 addr, u8 data)
68 {
69 struct mantis_ca *ca = en50221->data;
70 struct mantis_pci *mantis = ca->ca_priv;
71
72 dprintk(MANTIS_DEBUG, 1, "Slot(%d): Request CAM control Write", slot);
73
74 if (slot != 0)
75 return -EINVAL;
76
77 return mantis_hif_write_iom(ca, addr, data);
78 }
79
mantis_ca_slot_reset(struct dvb_ca_en50221 * en50221,int slot)80 static int mantis_ca_slot_reset(struct dvb_ca_en50221 *en50221, int slot)
81 {
82 struct mantis_ca *ca = en50221->data;
83 struct mantis_pci *mantis = ca->ca_priv;
84
85 dprintk(MANTIS_DEBUG, 1, "Slot(%d): Slot RESET", slot);
86 udelay(500); /* Wait.. */
87 mmwrite(0xda, MANTIS_PCMCIA_RESET); /* Leading edge assert */
88 udelay(500);
89 mmwrite(0x00, MANTIS_PCMCIA_RESET); /* Trailing edge deassert */
90 msleep(1000);
91 dvb_ca_en50221_camready_irq(&ca->en50221, 0);
92
93 return 0;
94 }
95
mantis_ca_slot_shutdown(struct dvb_ca_en50221 * en50221,int slot)96 static int mantis_ca_slot_shutdown(struct dvb_ca_en50221 *en50221, int slot)
97 {
98 struct mantis_ca *ca = en50221->data;
99 struct mantis_pci *mantis = ca->ca_priv;
100
101 dprintk(MANTIS_DEBUG, 1, "Slot(%d): Slot shutdown", slot);
102
103 return 0;
104 }
105
mantis_ts_control(struct dvb_ca_en50221 * en50221,int slot)106 static int mantis_ts_control(struct dvb_ca_en50221 *en50221, int slot)
107 {
108 struct mantis_ca *ca = en50221->data;
109 struct mantis_pci *mantis = ca->ca_priv;
110
111 dprintk(MANTIS_DEBUG, 1, "Slot(%d): TS control", slot);
112
113 return 0;
114 }
115
mantis_slot_status(struct dvb_ca_en50221 * en50221,int slot,int open)116 static int mantis_slot_status(struct dvb_ca_en50221 *en50221, int slot, int open)
117 {
118 struct mantis_ca *ca = en50221->data;
119 struct mantis_pci *mantis = ca->ca_priv;
120
121 dprintk(MANTIS_DEBUG, 1, "Slot(%d): Poll Slot status", slot);
122
123 if (ca->slot_state == MODULE_INSERTED) {
124 dprintk(MANTIS_DEBUG, 1, "CA Module present and ready");
125 return DVB_CA_EN50221_POLL_CAM_PRESENT | DVB_CA_EN50221_POLL_CAM_READY;
126 } else {
127 dprintk(MANTIS_DEBUG, 1, "CA Module not present or not ready");
128 }
129
130 return 0;
131 }
132
mantis_ca_init(struct mantis_pci * mantis)133 int mantis_ca_init(struct mantis_pci *mantis)
134 {
135 struct dvb_adapter *dvb_adapter = &mantis->dvb_adapter;
136 struct mantis_ca *ca;
137 int ca_flags = 0, result;
138
139 dprintk(MANTIS_DEBUG, 1, "Initializing Mantis CA");
140 ca = kzalloc(sizeof(struct mantis_ca), GFP_KERNEL);
141 if (!ca) {
142 dprintk(MANTIS_ERROR, 1, "Out of memory!, exiting ..");
143 result = -ENOMEM;
144 goto err;
145 }
146
147 ca->ca_priv = mantis;
148 mantis->mantis_ca = ca;
149 ca_flags = DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE;
150 /* register CA interface */
151 ca->en50221.owner = THIS_MODULE;
152 ca->en50221.read_attribute_mem = mantis_ca_read_attr_mem;
153 ca->en50221.write_attribute_mem = mantis_ca_write_attr_mem;
154 ca->en50221.read_cam_control = mantis_ca_read_cam_ctl;
155 ca->en50221.write_cam_control = mantis_ca_write_cam_ctl;
156 ca->en50221.slot_reset = mantis_ca_slot_reset;
157 ca->en50221.slot_shutdown = mantis_ca_slot_shutdown;
158 ca->en50221.slot_ts_enable = mantis_ts_control;
159 ca->en50221.poll_slot_status = mantis_slot_status;
160 ca->en50221.data = ca;
161
162 mutex_init(&ca->ca_lock);
163
164 init_waitqueue_head(&ca->hif_data_wq);
165 init_waitqueue_head(&ca->hif_opdone_wq);
166 init_waitqueue_head(&ca->hif_write_wq);
167
168 dprintk(MANTIS_ERROR, 1, "Registering EN50221 device");
169 result = dvb_ca_en50221_init(dvb_adapter, &ca->en50221, ca_flags, 1);
170 if (result != 0) {
171 dprintk(MANTIS_ERROR, 1, "EN50221: Initialization failed <%d>", result);
172 goto err;
173 }
174 dprintk(MANTIS_ERROR, 1, "Registered EN50221 device");
175 mantis_evmgr_init(ca);
176 return 0;
177 err:
178 kfree(ca);
179 return result;
180 }
181 EXPORT_SYMBOL_GPL(mantis_ca_init);
182
mantis_ca_exit(struct mantis_pci * mantis)183 void mantis_ca_exit(struct mantis_pci *mantis)
184 {
185 struct mantis_ca *ca = mantis->mantis_ca;
186
187 dprintk(MANTIS_DEBUG, 1, "Mantis CA exit");
188 if (!ca)
189 return;
190
191 mantis_evmgr_exit(ca);
192 dprintk(MANTIS_ERROR, 1, "Unregistering EN50221 device");
193 dvb_ca_en50221_release(&ca->en50221);
194
195 kfree(ca);
196 }
197 EXPORT_SYMBOL_GPL(mantis_ca_exit);
198