1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
|
/* /linux/drivers/misc/modem_if/modem_modemctl_device_cmc220.c
*
* Copyright (C) 2010 Google, Inc.
* Copyright (C) 2010 Samsung Electronics.
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#include <linux/init.h>
#include <linux/irq.h>
#include <linux/interrupt.h>
#include <linux/gpio.h>
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/platform_data/modem_na.h>
#include "modem_prj.h"
#include "modem_link_device_usb.h"
static int cmc220_on(struct modem_ctl *mc)
{
pr_info("[MODEM_IF] %s()\n", __func__);
if (!mc->gpio_cp_off || !mc->gpio_cp_on || !mc->gpio_cp_reset) {
pr_err("[MODEM_IF] no gpio data\n");
return -ENXIO;
}
gpio_set_value(mc->gpio_cp_on, 1);
msleep(300);
gpio_set_value(mc->gpio_cp_reset, 1);
msleep(100);
gpio_set_value(mc->gpio_cp_off, 0);
msleep(300);
mc->phone_state = STATE_BOOTING;
return 0;
}
static int cmc220_off(struct modem_ctl *mc)
{
pr_info("[MODEM_IF] %s()\n", __func__);
if (!mc->gpio_cp_off || !mc->gpio_cp_on || !mc->gpio_cp_reset) {
pr_err("[MODEM_IF] no gpio data\n");
return -ENXIO;
}
gpio_set_value(mc->gpio_cp_on, 0);
msleep(100);
gpio_set_value(mc->gpio_cp_off, 1);
msleep(100);
gpio_set_value(mc->gpio_cp_reset, 0);
mc->phone_state = STATE_OFFLINE;
return 0;
}
static int cmc220_force_crash_exit(struct modem_ctl *mc)
{
pr_info("[MODEM_IF] %s: # %d\n", __func__, ++(mc->crash_cnt));
mc->phone_state = STATE_CRASH_EXIT;/* DUMP START */
if (mc->iod && mc->iod->modem_state_changed)
mc->iod->modem_state_changed(mc->iod, mc->phone_state);
return 0;
}
static int cmc220_dump_reset(struct modem_ctl *mc)
{
pr_info("[MODEM_IF] %s()\n", __func__);
if (!mc->gpio_cp_reset)
return -ENXIO;
gpio_set_value(mc->gpio_host_active, 0);
mc->cpcrash_flag = 1;
gpio_set_value(mc->gpio_cp_reset, 0);
msleep(100);
gpio_set_value(mc->gpio_cp_reset, 1);
msleep(300);
mc->phone_state = STATE_BOOTING;
return 0;
}
static int cmc220_reset(struct modem_ctl *mc)
{
pr_info("[MODEM_IF] %s()\n", __func__);
if (!mc->gpio_cp_reset)
return -ENXIO;
if (cmc220_off(mc))
return -ENXIO;
msleep(100);
if (cmc220_on(mc))
return -ENXIO;
mc->phone_state = STATE_BOOTING;
return 0;
}
static int cmc220_boot_on(struct modem_ctl *mc)
{
pr_info("[MODEM_IF] %s()\n", __func__);
return 0;
}
static int cmc220_boot_off(struct modem_ctl *mc)
{
pr_info("[MODEM_IF] %s()\n", __func__);
return 0;
}
static int cmc220_get_active(struct modem_ctl *mc)
{
if (!mc->gpio_phone_active || !mc->gpio_cp_reset)
return -ENXIO;
pr_debug("cp %d phone %d\n",
gpio_get_value(mc->gpio_cp_reset),
gpio_get_value(mc->gpio_phone_active));
if (gpio_get_value(mc->gpio_cp_reset))
return gpio_get_value(mc->gpio_phone_active);
return 0;
}
static void mc_work(struct work_struct *work_arg)
{
struct modem_ctl *mc = container_of(work_arg, struct modem_ctl,
dwork.work);
int phone_active;
phone_active = cmc220_get_active(mc);
if (phone_active < 0) {
pr_err("[MODEM_IF] gpio not initialized\n");
return;
}
switch (mc->phone_state) {
case STATE_CRASH_EXIT:
case STATE_BOOTING:
case STATE_LOADER_DONE:
if (phone_active) {
if (mc->cpcrash_flag) {
pr_info("[MODEM_IF] LTE DUMP END!!\n");
mc->cpcrash_flag = 0;
}
}
break;
case STATE_ONLINE:
if (!phone_active) {
pr_info("[MODEM_IF] LTE CRASHED!! LTE DUMP START!!\n");
mc->phone_state = STATE_CRASH_EXIT;
if (mc->iod && mc->iod->modem_state_changed)
mc->iod->modem_state_changed(mc->iod,
mc->phone_state);
}
break;
default:
mc->phone_state = STATE_OFFLINE;
pr_err("[MODEM_IF], phone_status changed to invalid!!\n");
break;
}
}
static irqreturn_t phone_active_irq_handler(int irq, void *_mc)
{
struct modem_ctl *mc = (struct modem_ctl *)_mc;
schedule_delayed_work(&mc->dwork, 20);
return IRQ_HANDLED;
}
static void cmc220_get_ops(struct modem_ctl *mc)
{
mc->ops.modem_on = cmc220_on;
mc->ops.modem_off = cmc220_off;
mc->ops.modem_reset = cmc220_reset;
mc->ops.modem_boot_on = cmc220_boot_on;
mc->ops.modem_boot_off = cmc220_boot_off;
mc->ops.modem_force_crash_exit = cmc220_force_crash_exit;
mc->ops.modem_dump_reset = cmc220_dump_reset;
}
int cmc220_init_modemctl_device(struct modem_ctl *mc,
struct modem_data *pdata)
{
int ret = 0;
struct platform_device *pdev;
mc->gpio_cp_on = pdata->gpio_cp_on;
mc->gpio_reset_req_n = pdata->gpio_reset_req_n;
mc->gpio_cp_reset = pdata->gpio_cp_reset;
mc->gpio_pda_active = pdata->gpio_pda_active;
mc->gpio_phone_active = pdata->gpio_phone_active;
mc->gpio_cp_dump_int = pdata->gpio_cp_dump_int;
mc->gpio_flm_uart_sel = pdata->gpio_flm_uart_sel;
mc->gpio_cp_warm_reset = pdata->gpio_cp_warm_reset;
mc->gpio_cp_off = pdata->gpio_cp_off;
mc->gpio_slave_wakeup = pdata->gpio_slave_wakeup;
mc->gpio_host_active = pdata->gpio_host_active;
mc->gpio_host_wakeup = pdata->gpio_host_wakeup;
pdev = to_platform_device(mc->dev);
mc->irq_phone_active = gpio_to_irq(mc->gpio_phone_active);
cmc220_get_ops(mc);
dev_set_drvdata(mc->dev, mc);
INIT_DELAYED_WORK(&mc->dwork, mc_work);
ret = request_irq(mc->irq_phone_active, phone_active_irq_handler,
IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
"lte_phone_active", mc);
if (ret) {
pr_err("[MODEM_IF] Failed to allocate an interrupt(%d)\n",
mc->irq_phone_active);
goto irq_fail;
}
mc->irq[0] = mc->irq_phone_active;
enable_irq_wake(mc->irq_phone_active);
/*disable_irq(mc->irq_phone_active);*/
return ret;
irq_fail:
kfree(mc);
return ret;
}
|
