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
|
/*
* arch/arm/mach-tegra/board-enterprise-baseband.c
*
* Copyright (c) 2011, NVIDIA Corporation.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* 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.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <linux/resource.h>
#include <linux/platform_device.h>
#include <linux/delay.h>
#include <linux/gpio.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/err.h>
#include <linux/wakelock.h>
#include <linux/platform_data/tegra_usb.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#include <mach/pinmux.h>
#include <mach/usb_phy.h>
#include <mach/tegra_usb_modem_power.h>
#include "devices.h"
#include "gpio-names.h"
/* Tegra3 BB GPIO */
#define MODEM_PWR_ON TEGRA_GPIO_PE0
#define MODEM_RESET TEGRA_GPIO_PE1
#define BB_RST_OUT TEGRA_GPIO_PV1
/* Icera BB GPIO */
#define AP2MDM_ACK TEGRA_GPIO_PE3
#define MDM2AP_ACK TEGRA_GPIO_PU5
#define AP2MDM_ACK2 TEGRA_GPIO_PE2
#define MDM2AP_ACK2 TEGRA_GPIO_PV0
/* ULPI GPIO */
#define ULPI_STP TEGRA_GPIO_PY3
#define ULPI_DIR TEGRA_GPIO_PY1
#define ULPI_D0 TEGRA_GPIO_PO1
#define ULPI_D1 TEGRA_GPIO_PO2
static struct wake_lock mdm_wake_lock;
static struct gpio modem_gpios[] = {
{MODEM_PWR_ON, GPIOF_OUT_INIT_LOW, "MODEM PWR ON"},
{MODEM_RESET, GPIOF_IN, "MODEM RESET"},
{BB_RST_OUT, GPIOF_IN, "BB RST OUT"},
{MDM2AP_ACK, GPIOF_IN, "MDM2AP_ACK"},
{AP2MDM_ACK2, GPIOF_OUT_INIT_HIGH, "AP2MDM ACK2"},
{AP2MDM_ACK, GPIOF_OUT_INIT_LOW, "AP2MDM ACK"},
{ULPI_STP, GPIOF_IN, "ULPI_STP"},
{ULPI_DIR, GPIOF_OUT_INIT_LOW, "ULPI_DIR"},
{ULPI_D0, GPIOF_OUT_INIT_LOW, "ULPI_D0"},
{ULPI_D1, GPIOF_OUT_INIT_LOW, "ULPI_D1"},
};
static int baseband_phy_on(void);
static int baseband_phy_off(void);
static void baseband_phy_restore_start(void);
static void baseband_phy_restore_end(void);
static struct tegra_ulpi_trimmer e1219_trimmer = { 10, 1, 1, 1 };
static struct tegra_ulpi_config ehci2_null_ulpi_phy_config = {
.trimmer = &e1219_trimmer,
.post_phy_on = baseband_phy_on,
.pre_phy_off = baseband_phy_off,
.phy_restore_start = baseband_phy_restore_start,
.phy_restore_end = baseband_phy_restore_end,
.phy_restore_gpio = MDM2AP_ACK,
.ulpi_dir_gpio = ULPI_DIR,
.ulpi_d0_gpio = ULPI_D0,
.ulpi_d1_gpio = ULPI_D1,
};
static struct tegra_ehci_platform_data ehci2_null_ulpi_platform_data = {
.operating_mode = TEGRA_USB_HOST,
.power_down_on_bus_suspend = 0,
.phy_config = &ehci2_null_ulpi_phy_config,
.phy_type = TEGRA_USB_PHY_TYPE_NULL_ULPI,
};
static int __init tegra_null_ulpi_init(void)
{
tegra_ehci2_device.dev.platform_data = &ehci2_null_ulpi_platform_data;
platform_device_register(&tegra_ehci2_device);
return 0;
}
static irqreturn_t mdm_start_thread(int irq, void *data)
{
if (gpio_get_value(BB_RST_OUT)) {
pr_info("BB_RST_OUT high\n");
} else {
pr_info("BB_RST_OUT low\n");
}
/* hold wait lock to complete the enumeration */
wake_lock_timeout(&mdm_wake_lock, HZ * 10);
return IRQ_HANDLED;
}
static int baseband_phy_on(void)
{
static bool phy_init = false;
if (!phy_init) {
/* set AP2MDM_ACK2 low */
gpio_set_value(AP2MDM_ACK2, 0);
phy_init = true;
}
pr_info("%s\n", __func__);
return 0;
}
static int baseband_phy_off(void)
{
pr_info("%s\n", __func__);
return 0;
}
static void baseband_phy_restore_start(void)
{
/* set AP2MDM_ACK2 high */
gpio_set_value(AP2MDM_ACK2, 1);
}
static void baseband_phy_restore_end(void)
{
/* set AP2MDM_ACK2 low */
gpio_set_value(AP2MDM_ACK2, 0);
}
static void baseband_start(void)
{
/*
* Leave baseband powered OFF.
* User-space daemons will take care of powering it up.
*/
pr_info("%s\n", __func__);
gpio_set_value(MODEM_PWR_ON, 0);
}
static void baseband_reset(void)
{
/* Initiate power cycle on baseband sub system */
pr_info("%s\n", __func__);
gpio_set_value(MODEM_PWR_ON, 0);
mdelay(200);
gpio_set_value(MODEM_PWR_ON, 1);
}
static int baseband_init(void)
{
int irq;
int ret;
ret = gpio_request_array(modem_gpios, ARRAY_SIZE(modem_gpios));
if (ret)
return ret;
/* enable pull-up for ULPI STP */
tegra_pinmux_set_pullupdown(TEGRA_PINGROUP_ULPI_STP,
TEGRA_PUPD_PULL_UP);
/* enable pull-up for MDM2AP_ACK2 */
tegra_pinmux_set_pullupdown(TEGRA_PINGROUP_GPIO_PV0,
TEGRA_PUPD_PULL_UP);
tegra_gpio_enable(MODEM_PWR_ON);
tegra_gpio_enable(MODEM_RESET);
tegra_gpio_enable(AP2MDM_ACK2);
tegra_gpio_enable(BB_RST_OUT);
tegra_gpio_enable(AP2MDM_ACK);
tegra_gpio_enable(MDM2AP_ACK);
tegra_gpio_enable(TEGRA_GPIO_PY3);
tegra_gpio_enable(TEGRA_GPIO_PO1);
tegra_gpio_enable(TEGRA_GPIO_PO2);
/* export GPIO for user space access through sysfs */
gpio_export(MODEM_PWR_ON, false);
/* phy init */
tegra_null_ulpi_init();
wake_lock_init(&mdm_wake_lock, WAKE_LOCK_SUSPEND, "mdm_lock");
/* enable IRQ for BB_RST_OUT */
irq = gpio_to_irq(BB_RST_OUT);
ret = request_threaded_irq(irq, NULL, mdm_start_thread,
IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING,
"mdm_start", NULL);
if (ret < 0) {
pr_err("%s: request_threaded_irq error\n", __func__);
return ret;
}
ret = enable_irq_wake(irq);
if (ret) {
pr_err("%s: enable_irq_wake error\n", __func__);
free_irq(irq, NULL);
return ret;
}
return 0;
}
static const struct tegra_modem_operations baseband_operations = {
.init = baseband_init,
.start = baseband_start,
.reset = baseband_reset,
};
static struct tegra_usb_modem_power_platform_data baseband_pdata = {
.ops = &baseband_operations,
.wake_gpio = MDM2AP_ACK2,
.flags = IRQF_TRIGGER_FALLING,
};
static struct platform_device icera_baseband_device = {
.name = "tegra_usb_modem_power",
.id = -1,
.dev = {
.platform_data = &baseband_pdata,
},
};
int __init enterprise_modem_init(void)
{
platform_device_register(&icera_baseband_device);
return 0;
}
|
