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
28static 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
41static 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
54static 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
67static 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
80static 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
96static 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
106static 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
116static 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
133int 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;
177err:
178	kfree(ca);
179	return result;
180}
181EXPORT_SYMBOL_GPL(mantis_ca_init);
182
183void 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}
197EXPORT_SYMBOL_GPL(mantis_ca_exit);
198