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
|
/*
* arch/arm/mach-tegra/board-enterprise-baseband.c
*
* Copyright (c) 2011-2012, NVIDIA CORPORATION. All rights reserved.
*
* 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/err.h>
#include <linux/platform_data/tegra_usb.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 modem handshaking 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
static struct gpio modem_gpios[] = {
{MODEM_PWR_ON, GPIOF_OUT_INIT_LOW, "MODEM PWR ON"},
{MODEM_RESET, GPIOF_IN, "MODEM RESET"},
{AP2MDM_ACK2, GPIOF_OUT_INIT_HIGH, "AP2MDM ACK2"},
{AP2MDM_ACK, GPIOF_OUT_INIT_LOW, "AP2MDM ACK"},
};
static void baseband_post_phy_on(void);
static void baseband_pre_phy_off(void);
static struct tegra_usb_phy_platform_ops ulpi_null_plat_ops = {
.pre_phy_off = baseband_pre_phy_off,
.post_phy_on = baseband_post_phy_on,
};
static struct tegra_usb_platform_data tegra_ehci2_ulpi_null_pdata = {
.port_otg = false,
.has_hostpc = true,
.phy_intf = TEGRA_USB_PHY_INTF_ULPI_NULL,
.op_mode = TEGRA_USB_OPMODE_HOST,
.u_data.host = {
.vbus_gpio = -1,
.vbus_reg = NULL,
.hot_plug = true,
.remote_wakeup_supported = false,
.power_off_on_suspend = true,
},
.u_cfg.ulpi = {
.shadow_clk_delay = 10,
.clock_out_delay = 1,
.data_trimmer = 1,
.stpdirnxt_trimmer = 1,
.dir_trimmer = 1,
.clk = NULL,
.phy_restore_gpio = MDM2AP_ACK,
},
.ops = &ulpi_null_plat_ops,
};
static void baseband_post_phy_on(void)
{
/* set AP2MDM_ACK2 low */
gpio_set_value(AP2MDM_ACK2, 0);
}
static void baseband_pre_phy_off(void)
{
/* set AP2MDM_ACK2 high */
gpio_set_value(AP2MDM_ACK2, 1);
}
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 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);
/* export GPIO for user space access through sysfs */
gpio_export(MODEM_PWR_ON, false);
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,
.wake_irq_flags = IRQF_TRIGGER_FALLING,
.boot_gpio = BB_RST_OUT,
.boot_irq_flags = IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
.autosuspend_delay = 2000,
.short_autosuspend_delay = 50,
.tegra_ehci_device = &tegra_ehci2_device,
.tegra_ehci_pdata = &tegra_ehci2_ulpi_null_pdata,
};
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;
}
|
