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
|
/*
* Qualcomm EHCI driver
*
* (C) Copyright 2015 Mateusz Kulikowski <mateusz.kulikowski@gmail.com>
*
* Based on Linux driver
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <dm.h>
#include <errno.h>
#include <fdtdec.h>
#include <libfdt.h>
#include <usb.h>
#include <usb/ehci-ci.h>
#include <usb/ulpi.h>
#include <wait_bit.h>
#include <asm/gpio.h>
#include <asm/io.h>
#include <linux/compat.h>
#include "ehci.h"
/* PHY viewport regs */
#define ULPI_MISC_A_READ 0x96
#define ULPI_MISC_A_SET 0x97
#define ULPI_MISC_A_CLEAR 0x98
#define ULPI_MISC_A_VBUSVLDEXTSEL (1 << 1)
#define ULPI_MISC_A_VBUSVLDEXT (1 << 0)
#define GEN2_SESS_VLD_CTRL_EN (1 << 7)
#define SESS_VLD_CTRL (1 << 25)
struct msm_ehci_priv {
struct ehci_ctrl ctrl; /* Needed by EHCI */
struct usb_ehci *ehci; /* Start of IP core*/
struct ulpi_viewport ulpi_vp; /* ULPI Viewport */
};
int __weak board_prepare_usb(enum usb_init_type type)
{
return 0;
}
static void setup_usb_phy(struct msm_ehci_priv *priv)
{
/* Select and enable external configuration with USB PHY */
ulpi_write(&priv->ulpi_vp, (u8 *)ULPI_MISC_A_SET,
ULPI_MISC_A_VBUSVLDEXTSEL | ULPI_MISC_A_VBUSVLDEXT);
}
static void reset_usb_phy(struct msm_ehci_priv *priv)
{
/* Disable VBUS mimicing in the controller. */
ulpi_write(&priv->ulpi_vp, (u8 *)ULPI_MISC_A_CLEAR,
ULPI_MISC_A_VBUSVLDEXTSEL | ULPI_MISC_A_VBUSVLDEXT);
}
static int msm_init_after_reset(struct ehci_ctrl *dev)
{
struct msm_ehci_priv *p = container_of(dev, struct msm_ehci_priv, ctrl);
struct usb_ehci *ehci = p->ehci;
/* select ULPI phy */
writel(PORT_PTS_ULPI, &ehci->portsc);
setup_usb_phy(p);
/* Enable sess_vld */
setbits_le32(&ehci->genconfig2, GEN2_SESS_VLD_CTRL_EN);
/* Enable external vbus configuration in the LINK */
setbits_le32(&ehci->usbcmd, SESS_VLD_CTRL);
/* USB_OTG_HS_AHB_BURST */
writel(0x0, &ehci->sbuscfg);
/* USB_OTG_HS_AHB_MODE: HPROT_MODE */
/* Bus access related config. */
writel(0x08, &ehci->sbusmode);
/* set mode to host controller */
writel(CM_HOST, &ehci->usbmode);
return 0;
}
static const struct ehci_ops msm_ehci_ops = {
.init_after_reset = msm_init_after_reset
};
static int ehci_usb_probe(struct udevice *dev)
{
struct msm_ehci_priv *p = dev_get_priv(dev);
struct usb_ehci *ehci = p->ehci;
struct ehci_hccr *hccr;
struct ehci_hcor *hcor;
int ret;
hccr = (struct ehci_hccr *)((phys_addr_t)&ehci->caplength);
hcor = (struct ehci_hcor *)((phys_addr_t)hccr +
HC_LENGTH(ehci_readl(&(hccr)->cr_capbase)));
ret = board_prepare_usb(USB_INIT_HOST);
if (ret < 0)
return ret;
return ehci_register(dev, hccr, hcor, &msm_ehci_ops, 0, USB_INIT_HOST);
}
static int ehci_usb_remove(struct udevice *dev)
{
struct msm_ehci_priv *p = dev_get_priv(dev);
struct usb_ehci *ehci = p->ehci;
int ret;
ret = ehci_deregister(dev);
if (ret)
return ret;
/* Stop controller. */
clrbits_le32(&ehci->usbcmd, CMD_RUN);
reset_usb_phy(p);
ret = board_prepare_usb(USB_INIT_DEVICE); /* Board specific hook */
if (ret < 0)
return ret;
/* Reset controller */
setbits_le32(&ehci->usbcmd, CMD_RESET);
/* Wait for reset */
if (wait_for_bit(__func__, &ehci->usbcmd, CMD_RESET, false, 30,
false)) {
printf("Stuck on USB reset.\n");
return -ETIMEDOUT;
}
return 0;
}
static int ehci_usb_ofdata_to_platdata(struct udevice *dev)
{
struct msm_ehci_priv *priv = dev_get_priv(dev);
priv->ulpi_vp.port_num = 0;
priv->ehci = (void *)devfdt_get_addr(dev);
if (priv->ehci == (void *)FDT_ADDR_T_NONE)
return -EINVAL;
/* Warning: this will not work if viewport address is > 64 bit due to
* ULPI design.
*/
priv->ulpi_vp.viewport_addr = (phys_addr_t)&priv->ehci->ulpi_viewpoint;
return 0;
}
static const struct udevice_id ehci_usb_ids[] = {
{ .compatible = "qcom,ehci-host", },
{ }
};
U_BOOT_DRIVER(usb_ehci) = {
.name = "ehci_msm",
.id = UCLASS_USB,
.of_match = ehci_usb_ids,
.ofdata_to_platdata = ehci_usb_ofdata_to_platdata,
.probe = ehci_usb_probe,
.remove = ehci_usb_remove,
.ops = &ehci_usb_ops,
.priv_auto_alloc_size = sizeof(struct msm_ehci_priv),
.flags = DM_FLAG_ALLOC_PRIV_DMA,
};
|
