1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * netup_unidvb_ci.c
4 *
5 * DVB CAM support for NetUP Universal Dual DVB-CI
6 *
7 * Copyright (C) 2014 NetUP Inc.
8 * Copyright (C) 2014 Sergey Kozlov <serjk@netup.ru>
9 * Copyright (C) 2014 Abylay Ospan <aospan@netup.ru>
10 */
11
12 #include <linux/init.h>
13 #include <linux/module.h>
14 #include <linux/moduleparam.h>
15 #include <linux/kmod.h>
16 #include <linux/kernel.h>
17 #include <linux/slab.h>
18 #include <linux/interrupt.h>
19 #include <linux/delay.h>
20 #include "netup_unidvb.h"
21
22 /* CI slot 0 base address */
23 #define CAM0_CONFIG 0x0
24 #define CAM0_IO 0x8000
25 #define CAM0_MEM 0x10000
26 #define CAM0_SZ 32
27 /* CI slot 1 base address */
28 #define CAM1_CONFIG 0x20000
29 #define CAM1_IO 0x28000
30 #define CAM1_MEM 0x30000
31 #define CAM1_SZ 32
32 /* ctrlstat registers */
33 #define CAM_CTRLSTAT_READ_SET 0x4980
34 #define CAM_CTRLSTAT_CLR 0x4982
35 /* register bits */
36 #define BIT_CAM_STCHG (1<<0)
37 #define BIT_CAM_PRESENT (1<<1)
38 #define BIT_CAM_RESET (1<<2)
39 #define BIT_CAM_BYPASS (1<<3)
40 #define BIT_CAM_READY (1<<4)
41 #define BIT_CAM_ERROR (1<<5)
42 #define BIT_CAM_OVERCURR (1<<6)
43 /* BIT_CAM_BYPASS bit shift for SLOT 1 */
44 #define CAM1_SHIFT 8
45
netup_ci_interrupt(struct netup_unidvb_dev * ndev)46 irqreturn_t netup_ci_interrupt(struct netup_unidvb_dev *ndev)
47 {
48 writew(0x101, ndev->bmmio0 + CAM_CTRLSTAT_CLR);
49 return IRQ_HANDLED;
50 }
51
netup_unidvb_ci_slot_ts_ctl(struct dvb_ca_en50221 * en50221,int slot)52 static int netup_unidvb_ci_slot_ts_ctl(struct dvb_ca_en50221 *en50221,
53 int slot)
54 {
55 struct netup_ci_state *state = en50221->data;
56 struct netup_unidvb_dev *dev = state->dev;
57 u16 shift = (state->nr == 1) ? CAM1_SHIFT : 0;
58
59 dev_dbg(&dev->pci_dev->dev, "%s(): CAM_CTRLSTAT=0x%x\n",
60 __func__, readw(dev->bmmio0 + CAM_CTRLSTAT_READ_SET));
61 if (slot != 0)
62 return -EINVAL;
63 /* pass data to CAM module */
64 writew(BIT_CAM_BYPASS << shift, dev->bmmio0 + CAM_CTRLSTAT_CLR);
65 dev_dbg(&dev->pci_dev->dev, "%s(): CAM_CTRLSTAT=0x%x done\n",
66 __func__, readw(dev->bmmio0 + CAM_CTRLSTAT_READ_SET));
67 return 0;
68 }
69
netup_unidvb_ci_slot_shutdown(struct dvb_ca_en50221 * en50221,int slot)70 static int netup_unidvb_ci_slot_shutdown(struct dvb_ca_en50221 *en50221,
71 int slot)
72 {
73 struct netup_ci_state *state = en50221->data;
74 struct netup_unidvb_dev *dev = state->dev;
75
76 dev_dbg(&dev->pci_dev->dev, "%s()\n", __func__);
77 return 0;
78 }
79
netup_unidvb_ci_slot_reset(struct dvb_ca_en50221 * en50221,int slot)80 static int netup_unidvb_ci_slot_reset(struct dvb_ca_en50221 *en50221,
81 int slot)
82 {
83 struct netup_ci_state *state = en50221->data;
84 struct netup_unidvb_dev *dev = state->dev;
85 unsigned long timeout = 0;
86 u16 shift = (state->nr == 1) ? CAM1_SHIFT : 0;
87 u16 ci_stat = 0;
88 int reset_counter = 3;
89
90 dev_dbg(&dev->pci_dev->dev, "%s(): CAM_CTRLSTAT_READ_SET=0x%x\n",
91 __func__, readw(dev->bmmio0 + CAM_CTRLSTAT_READ_SET));
92 reset:
93 timeout = jiffies + msecs_to_jiffies(5000);
94 /* start reset */
95 writew(BIT_CAM_RESET << shift, dev->bmmio0 + CAM_CTRLSTAT_READ_SET);
96 dev_dbg(&dev->pci_dev->dev, "%s(): waiting for reset\n", __func__);
97 /* wait until reset done */
98 while (time_before(jiffies, timeout)) {
99 ci_stat = readw(dev->bmmio0 + CAM_CTRLSTAT_READ_SET);
100 if (ci_stat & (BIT_CAM_READY << shift))
101 break;
102 udelay(1000);
103 }
104 if (!(ci_stat & (BIT_CAM_READY << shift)) && reset_counter > 0) {
105 dev_dbg(&dev->pci_dev->dev,
106 "%s(): CAMP reset timeout! Will try again..\n",
107 __func__);
108 reset_counter--;
109 goto reset;
110 }
111 return 0;
112 }
113
netup_unidvb_poll_ci_slot_status(struct dvb_ca_en50221 * en50221,int slot,int open)114 static int netup_unidvb_poll_ci_slot_status(struct dvb_ca_en50221 *en50221,
115 int slot, int open)
116 {
117 struct netup_ci_state *state = en50221->data;
118 struct netup_unidvb_dev *dev = state->dev;
119 u16 shift = (state->nr == 1) ? CAM1_SHIFT : 0;
120 u16 ci_stat = 0;
121
122 dev_dbg(&dev->pci_dev->dev, "%s(): CAM_CTRLSTAT_READ_SET=0x%x\n",
123 __func__, readw(dev->bmmio0 + CAM_CTRLSTAT_READ_SET));
124 ci_stat = readw(dev->bmmio0 + CAM_CTRLSTAT_READ_SET);
125 if (ci_stat & (BIT_CAM_READY << shift)) {
126 state->status = DVB_CA_EN50221_POLL_CAM_PRESENT |
127 DVB_CA_EN50221_POLL_CAM_READY;
128 } else if (ci_stat & (BIT_CAM_PRESENT << shift)) {
129 state->status = DVB_CA_EN50221_POLL_CAM_PRESENT;
130 } else {
131 state->status = 0;
132 }
133 return state->status;
134 }
135
netup_unidvb_ci_read_attribute_mem(struct dvb_ca_en50221 * en50221,int slot,int addr)136 static int netup_unidvb_ci_read_attribute_mem(struct dvb_ca_en50221 *en50221,
137 int slot, int addr)
138 {
139 struct netup_ci_state *state = en50221->data;
140 struct netup_unidvb_dev *dev = state->dev;
141 u8 val = *((u8 __force *)state->membase8_config + addr);
142
143 dev_dbg(&dev->pci_dev->dev,
144 "%s(): addr=0x%x val=0x%x\n", __func__, addr, val);
145 return val;
146 }
147
netup_unidvb_ci_write_attribute_mem(struct dvb_ca_en50221 * en50221,int slot,int addr,u8 data)148 static int netup_unidvb_ci_write_attribute_mem(struct dvb_ca_en50221 *en50221,
149 int slot, int addr, u8 data)
150 {
151 struct netup_ci_state *state = en50221->data;
152 struct netup_unidvb_dev *dev = state->dev;
153
154 dev_dbg(&dev->pci_dev->dev,
155 "%s(): addr=0x%x data=0x%x\n", __func__, addr, data);
156 *((u8 __force *)state->membase8_config + addr) = data;
157 return 0;
158 }
159
netup_unidvb_ci_read_cam_ctl(struct dvb_ca_en50221 * en50221,int slot,u8 addr)160 static int netup_unidvb_ci_read_cam_ctl(struct dvb_ca_en50221 *en50221,
161 int slot, u8 addr)
162 {
163 struct netup_ci_state *state = en50221->data;
164 struct netup_unidvb_dev *dev = state->dev;
165 u8 val = *((u8 __force *)state->membase8_io + addr);
166
167 dev_dbg(&dev->pci_dev->dev,
168 "%s(): addr=0x%x val=0x%x\n", __func__, addr, val);
169 return val;
170 }
171
netup_unidvb_ci_write_cam_ctl(struct dvb_ca_en50221 * en50221,int slot,u8 addr,u8 data)172 static int netup_unidvb_ci_write_cam_ctl(struct dvb_ca_en50221 *en50221,
173 int slot, u8 addr, u8 data)
174 {
175 struct netup_ci_state *state = en50221->data;
176 struct netup_unidvb_dev *dev = state->dev;
177
178 dev_dbg(&dev->pci_dev->dev,
179 "%s(): addr=0x%x data=0x%x\n", __func__, addr, data);
180 *((u8 __force *)state->membase8_io + addr) = data;
181 return 0;
182 }
183
netup_unidvb_ci_register(struct netup_unidvb_dev * dev,int num,struct pci_dev * pci_dev)184 int netup_unidvb_ci_register(struct netup_unidvb_dev *dev,
185 int num, struct pci_dev *pci_dev)
186 {
187 int result;
188 struct netup_ci_state *state;
189
190 if (num < 0 || num > 1) {
191 dev_err(&pci_dev->dev, "%s(): invalid CI adapter %d\n",
192 __func__, num);
193 return -EINVAL;
194 }
195 state = &dev->ci[num];
196 state->nr = num;
197 state->membase8_config = dev->bmmio1 +
198 ((num == 0) ? CAM0_CONFIG : CAM1_CONFIG);
199 state->membase8_io = dev->bmmio1 +
200 ((num == 0) ? CAM0_IO : CAM1_IO);
201 state->dev = dev;
202 state->ca.owner = THIS_MODULE;
203 state->ca.read_attribute_mem = netup_unidvb_ci_read_attribute_mem;
204 state->ca.write_attribute_mem = netup_unidvb_ci_write_attribute_mem;
205 state->ca.read_cam_control = netup_unidvb_ci_read_cam_ctl;
206 state->ca.write_cam_control = netup_unidvb_ci_write_cam_ctl;
207 state->ca.slot_reset = netup_unidvb_ci_slot_reset;
208 state->ca.slot_shutdown = netup_unidvb_ci_slot_shutdown;
209 state->ca.slot_ts_enable = netup_unidvb_ci_slot_ts_ctl;
210 state->ca.poll_slot_status = netup_unidvb_poll_ci_slot_status;
211 state->ca.data = state;
212 result = dvb_ca_en50221_init(&dev->frontends[num].adapter,
213 &state->ca, 0, 1);
214 if (result < 0) {
215 dev_err(&pci_dev->dev,
216 "%s(): dvb_ca_en50221_init result %d\n",
217 __func__, result);
218 return result;
219 }
220 writew(NETUP_UNIDVB_IRQ_CI, dev->bmmio0 + REG_IMASK_SET);
221 dev_info(&pci_dev->dev,
222 "%s(): CI adapter %d init done\n", __func__, num);
223 return 0;
224 }
225
netup_unidvb_ci_unregister(struct netup_unidvb_dev * dev,int num)226 void netup_unidvb_ci_unregister(struct netup_unidvb_dev *dev, int num)
227 {
228 struct netup_ci_state *state;
229
230 dev_dbg(&dev->pci_dev->dev, "%s()\n", __func__);
231 if (num < 0 || num > 1) {
232 dev_err(&dev->pci_dev->dev, "%s(): invalid CI adapter %d\n",
233 __func__, num);
234 return;
235 }
236 state = &dev->ci[num];
237 dvb_ca_en50221_release(&state->ca);
238 }
239
240