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
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (C) 2012 Oleksandr Tymoshenko <gonzo@freebsd.org>
* Copyright (C) 2014 Marek Vasut <marex@denx.de>
*
* Copied from u-Boot
*/
#include <common.h>
#include <of.h>
#include <dma.h>
#include <init.h>
#include <errno.h>
#include <driver.h>
#include <linux/clk.h>
#include <linux/reset.h>
#include <of_device.h>
#include "dwc2.h"
static void dwc2_set_stm32mp15_fsotg_params(struct dwc2 *dwc2)
{
struct dwc2_core_params *p = &dwc2->params;
p->otg_cap &= ~(DWC2_CAP_PARAM_HNP_SRP_CAPABLE
| DWC2_CAP_PARAM_SRP_ONLY_CAPABLE);
p->otg_cap |= DWC2_CAP_PARAM_NO_HNP_SRP_CAPABLE;
p->speed = DWC2_SPEED_PARAM_FULL;
p->host_rx_fifo_size = 128;
p->host_nperio_tx_fifo_size = 96;
p->host_perio_tx_fifo_size = 96;
p->max_packet_count = 256;
p->phy_type = DWC2_PHY_TYPE_PARAM_FS;
p->i2c_enable = false;
p->activate_stm_fs_transceiver = true;
p->ahbcfg = GAHBCFG_HBSTLEN_INCR16 << GAHBCFG_HBSTLEN_SHIFT;
p->power_down = DWC2_POWER_DOWN_PARAM_NONE;
p->host_support_fs_ls_low_power = true;
p->host_ls_low_power_phy_clk = true;
}
static void dwc2_set_stm32mp15_hsotg_params(struct dwc2 *dwc2)
{
struct dwc2_core_params *p = &dwc2->params;
p->otg_cap &= ~(DWC2_CAP_PARAM_HNP_SRP_CAPABLE
| DWC2_CAP_PARAM_SRP_ONLY_CAPABLE);
p->otg_cap |= DWC2_CAP_PARAM_NO_HNP_SRP_CAPABLE;
p->host_rx_fifo_size = 440;
p->host_nperio_tx_fifo_size = 256;
p->host_perio_tx_fifo_size = 256;
p->ahbcfg = GAHBCFG_HBSTLEN_INCR16 << GAHBCFG_HBSTLEN_SHIFT;
p->power_down = DWC2_POWER_DOWN_PARAM_NONE;
p->lpm = false;
p->lpm_clock_gating = false;
p->besl = false;
p->hird_threshold_en = false;
}
static int dwc2_set_mode(void *ctx, enum usb_dr_mode mode)
{
struct dwc2 *dwc2 = ctx;
int ret = -ENODEV;
int oldmode = dwc2->dr_mode;
dwc2->dr_mode = mode;
if (mode == USB_DR_MODE_HOST || mode == USB_DR_MODE_OTG) {
if (IS_ENABLED(CONFIG_USB_DWC2_HOST))
ret = dwc2_register_host(dwc2);
else
dwc2_err(dwc2, "Host support not available\n");
}
if (mode == USB_DR_MODE_PERIPHERAL || mode == USB_DR_MODE_OTG) {
if (IS_ENABLED(CONFIG_USB_DWC2_GADGET))
ret = dwc2_gadget_init(dwc2);
else
dwc2_err(dwc2, "Peripheral support not available\n");
}
if (ret)
dwc2->dr_mode = oldmode;
return ret;
}
typedef void (*set_params_cb)(struct dwc2 *dwc2);
static int dwc2_probe(struct device *dev)
{
struct resource *iores;
struct dwc2 *dwc2;
set_params_cb set_params;
int ret;
iores = dev_request_mem_resource(dev, 0);
if (IS_ERR(iores))
return PTR_ERR(iores);
dwc2 = xzalloc(sizeof(*dwc2));
dwc2->regs = IOMEM(iores->start);
dwc2->dev = dev;
dwc2->clk = clk_get(dev, "otg");
if (IS_ERR(dwc2->clk)) {
ret = PTR_ERR(dwc2->clk);
dev_err(dev, "Failed to get USB clock %d\n", ret);
goto release_region;
}
ret = clk_enable(dwc2->clk);
if (ret)
goto clk_put;
ret = device_reset_us(dev, 2);
if (ret)
goto clk_disable;
dwc2->phy = phy_optional_get(dev, "usb2-phy");
if (IS_ERR(dwc2->phy)) {
ret = PTR_ERR(dwc2->phy);
goto clk_disable;
}
ret = phy_power_on(dwc2->phy);
if (ret)
goto clk_disable;
ret = phy_init(dwc2->phy);
if (ret)
goto phy_power_off;
ret = dwc2_check_core_version(dwc2);
if (ret)
goto error;
/*
* Reset before dwc2_get_hwparams() then it could get power-on real
* reset value form registers.
*/
ret = dwc2_core_reset(dwc2);
if (ret)
goto error;
/* Detect config values from hardware */
dwc2_get_hwparams(dwc2);
ret = dwc2_get_dr_mode(dwc2);
if (ret)
goto error;
dwc2_set_default_params(dwc2);
dwc2_get_device_properties(dwc2);
set_params = of_device_get_match_data(dev);
if (set_params)
set_params(dwc2);
dma_set_mask(dev, DMA_BIT_MASK(32));
dev->priv = dwc2;
if (dwc2->dr_mode == USB_DR_MODE_OTG)
ret = usb_register_otg_device(dwc2->dev, dwc2_set_mode, dwc2);
else
ret = dwc2_set_mode(dwc2, dwc2->dr_mode);
if (ret)
goto error;
return 0;
error:
phy_exit(dwc2->phy);
phy_power_off:
phy_power_off(dwc2->phy);
clk_disable:
clk_disable(dwc2->clk);
clk_put:
clk_put(dwc2->clk);
release_region:
release_region(iores);
free(dwc2);
return ret;
}
static void dwc2_remove(struct device *dev)
{
struct dwc2 *dwc2 = dev->priv;
dwc2_host_uninit(dwc2);
dwc2_gadget_uninit(dwc2);
phy_exit(dwc2->phy);
phy_power_off(dwc2->phy);
}
static const struct of_device_id dwc2_platform_dt_ids[] = {
{ .compatible = "brcm,bcm2835-usb", },
{ .compatible = "brcm,bcm2708-usb", },
{ .compatible = "snps,dwc2", },
{ .compatible = "st,stm32mp15-fsotg",
.data = dwc2_set_stm32mp15_fsotg_params },
{ .compatible = "st,stm32mp15-hsotg",
.data = dwc2_set_stm32mp15_hsotg_params },
{ }
};
MODULE_DEVICE_TABLE(of, dwc2_platform_dt_ids);
static struct driver dwc2_driver = {
.name = "dwc2",
.probe = dwc2_probe,
.remove = dwc2_remove,
.of_compatible = DRV_OF_COMPAT(dwc2_platform_dt_ids),
};
device_platform_driver(dwc2_driver);
|
