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
255
256
257
258
259
260
261
262
263
264
265
266
267
|
// SPDX-License-Identifier: GPL-2.0
/*
* xHCI host controller driver for R-Car SoCs
*
* Copyright (C) 2014 Renesas Electronics Corporation
*/
#include <linux/firmware.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/of.h>
#include <linux/usb/phy.h>
#include <linux/sys_soc.h>
#include "xhci.h"
#include "xhci-plat.h"
#include "xhci-rcar.h"
/*
* - The V3 firmware is for almost all R-Car Gen3 (except r8a7795 ES1.x)
* - The V2 firmware is for r8a7795 ES1.x.
* - The V2 firmware is possible to use on R-Car Gen2. However, the V2 causes
* performance degradation. So, this driver continues to use the V1 if R-Car
* Gen2.
* - The V1 firmware is impossible to use on R-Car Gen3.
*/
MODULE_FIRMWARE(XHCI_RCAR_FIRMWARE_NAME_V1);
MODULE_FIRMWARE(XHCI_RCAR_FIRMWARE_NAME_V2);
MODULE_FIRMWARE(XHCI_RCAR_FIRMWARE_NAME_V3);
/*** Register Offset ***/
#define RCAR_USB3_AXH_STA 0x104 /* AXI Host Control Status */
#define RCAR_USB3_INT_ENA 0x224 /* Interrupt Enable */
#define RCAR_USB3_DL_CTRL 0x250 /* FW Download Control & Status */
#define RCAR_USB3_FW_DATA0 0x258 /* FW Data0 */
#define RCAR_USB3_LCLK 0xa44 /* LCLK Select */
#define RCAR_USB3_CONF1 0xa48 /* USB3.0 Configuration1 */
#define RCAR_USB3_CONF2 0xa5c /* USB3.0 Configuration2 */
#define RCAR_USB3_CONF3 0xaa8 /* USB3.0 Configuration3 */
#define RCAR_USB3_RX_POL 0xab0 /* USB3.0 RX Polarity */
#define RCAR_USB3_TX_POL 0xab8 /* USB3.0 TX Polarity */
/*** Register Settings ***/
/* AXI Host Control Status */
#define RCAR_USB3_AXH_STA_B3_PLL_ACTIVE 0x00010000
#define RCAR_USB3_AXH_STA_B2_PLL_ACTIVE 0x00000001
#define RCAR_USB3_AXH_STA_PLL_ACTIVE_MASK (RCAR_USB3_AXH_STA_B3_PLL_ACTIVE | \
RCAR_USB3_AXH_STA_B2_PLL_ACTIVE)
/* Interrupt Enable */
#define RCAR_USB3_INT_XHC_ENA 0x00000001
#define RCAR_USB3_INT_PME_ENA 0x00000002
#define RCAR_USB3_INT_HSE_ENA 0x00000004
#define RCAR_USB3_INT_ENA_VAL (RCAR_USB3_INT_XHC_ENA | \
RCAR_USB3_INT_PME_ENA | RCAR_USB3_INT_HSE_ENA)
/* FW Download Control & Status */
#define RCAR_USB3_DL_CTRL_ENABLE 0x00000001
#define RCAR_USB3_DL_CTRL_FW_SUCCESS 0x00000010
#define RCAR_USB3_DL_CTRL_FW_SET_DATA0 0x00000100
/* LCLK Select */
#define RCAR_USB3_LCLK_ENA_VAL 0x01030001
/* USB3.0 Configuration */
#define RCAR_USB3_CONF1_VAL 0x00030204
#define RCAR_USB3_CONF2_VAL 0x00030300
#define RCAR_USB3_CONF3_VAL 0x13802007
/* USB3.0 Polarity */
#define RCAR_USB3_RX_POL_VAL BIT(21)
#define RCAR_USB3_TX_POL_VAL BIT(4)
/* For soc_device_attribute */
#define RCAR_XHCI_FIRMWARE_V2 BIT(0) /* FIRMWARE V2 */
#define RCAR_XHCI_FIRMWARE_V3 BIT(1) /* FIRMWARE V3 */
static const struct soc_device_attribute rcar_quirks_match[] = {
{
.soc_id = "r8a7795", .revision = "ES1.*",
.data = (void *)RCAR_XHCI_FIRMWARE_V2,
},
{ /* sentinel */ },
};
static void xhci_rcar_start_gen2(struct usb_hcd *hcd)
{
/* LCLK Select */
writel(RCAR_USB3_LCLK_ENA_VAL, hcd->regs + RCAR_USB3_LCLK);
/* USB3.0 Configuration */
writel(RCAR_USB3_CONF1_VAL, hcd->regs + RCAR_USB3_CONF1);
writel(RCAR_USB3_CONF2_VAL, hcd->regs + RCAR_USB3_CONF2);
writel(RCAR_USB3_CONF3_VAL, hcd->regs + RCAR_USB3_CONF3);
/* USB3.0 Polarity */
writel(RCAR_USB3_RX_POL_VAL, hcd->regs + RCAR_USB3_RX_POL);
writel(RCAR_USB3_TX_POL_VAL, hcd->regs + RCAR_USB3_TX_POL);
}
static int xhci_rcar_is_gen2(struct device *dev)
{
struct device_node *node = dev->of_node;
return of_device_is_compatible(node, "renesas,xhci-r8a7790") ||
of_device_is_compatible(node, "renesas,xhci-r8a7791") ||
of_device_is_compatible(node, "renesas,xhci-r8a7793") ||
of_device_is_compatible(node, "renensas,rcar-gen2-xhci");
}
static int xhci_rcar_is_gen3(struct device *dev)
{
struct device_node *node = dev->of_node;
return of_device_is_compatible(node, "renesas,xhci-r8a7795") ||
of_device_is_compatible(node, "renesas,xhci-r8a7796") ||
of_device_is_compatible(node, "renesas,rcar-gen3-xhci");
}
void xhci_rcar_start(struct usb_hcd *hcd)
{
u32 temp;
if (hcd->regs != NULL) {
/* Interrupt Enable */
temp = readl(hcd->regs + RCAR_USB3_INT_ENA);
temp |= RCAR_USB3_INT_ENA_VAL;
writel(temp, hcd->regs + RCAR_USB3_INT_ENA);
if (xhci_rcar_is_gen2(hcd->self.controller))
xhci_rcar_start_gen2(hcd);
}
}
static int xhci_rcar_download_firmware(struct usb_hcd *hcd)
{
struct device *dev = hcd->self.controller;
void __iomem *regs = hcd->regs;
struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd);
const struct firmware *fw;
int retval, index, j, time;
int timeout = 10000;
u32 data, val, temp;
u32 quirks = 0;
const struct soc_device_attribute *attr;
const char *firmware_name;
attr = soc_device_match(rcar_quirks_match);
if (attr)
quirks = (uintptr_t)attr->data;
if (quirks & RCAR_XHCI_FIRMWARE_V2)
firmware_name = XHCI_RCAR_FIRMWARE_NAME_V2;
else if (quirks & RCAR_XHCI_FIRMWARE_V3)
firmware_name = XHCI_RCAR_FIRMWARE_NAME_V3;
else
firmware_name = priv->firmware_name;
/* request R-Car USB3.0 firmware */
retval = request_firmware(&fw, firmware_name, dev);
if (retval)
return retval;
/* download R-Car USB3.0 firmware */
temp = readl(regs + RCAR_USB3_DL_CTRL);
temp |= RCAR_USB3_DL_CTRL_ENABLE;
writel(temp, regs + RCAR_USB3_DL_CTRL);
for (index = 0; index < fw->size; index += 4) {
/* to avoid reading beyond the end of the buffer */
for (data = 0, j = 3; j >= 0; j--) {
if ((j + index) < fw->size)
data |= fw->data[index + j] << (8 * j);
}
writel(data, regs + RCAR_USB3_FW_DATA0);
temp = readl(regs + RCAR_USB3_DL_CTRL);
temp |= RCAR_USB3_DL_CTRL_FW_SET_DATA0;
writel(temp, regs + RCAR_USB3_DL_CTRL);
for (time = 0; time < timeout; time++) {
val = readl(regs + RCAR_USB3_DL_CTRL);
if ((val & RCAR_USB3_DL_CTRL_FW_SET_DATA0) == 0)
break;
udelay(1);
}
if (time == timeout) {
retval = -ETIMEDOUT;
break;
}
}
temp = readl(regs + RCAR_USB3_DL_CTRL);
temp &= ~RCAR_USB3_DL_CTRL_ENABLE;
writel(temp, regs + RCAR_USB3_DL_CTRL);
for (time = 0; time < timeout; time++) {
val = readl(regs + RCAR_USB3_DL_CTRL);
if (val & RCAR_USB3_DL_CTRL_FW_SUCCESS) {
retval = 0;
break;
}
udelay(1);
}
if (time == timeout)
retval = -ETIMEDOUT;
release_firmware(fw);
return retval;
}
static bool xhci_rcar_wait_for_pll_active(struct usb_hcd *hcd)
{
int timeout = 1000;
u32 val, mask = RCAR_USB3_AXH_STA_PLL_ACTIVE_MASK;
while (timeout > 0) {
val = readl(hcd->regs + RCAR_USB3_AXH_STA);
if ((val & mask) == mask)
return true;
udelay(1);
timeout--;
}
return false;
}
/* This function needs to initialize a "phy" of usb before */
int xhci_rcar_init_quirk(struct usb_hcd *hcd)
{
struct xhci_hcd *xhci = hcd_to_xhci(hcd);
/* If hcd->regs is NULL, we don't just call the following function */
if (!hcd->regs)
return 0;
/*
* On R-Car Gen2 and Gen3, the AC64 bit (bit 0) of HCCPARAMS1 is set
* to 1. However, these SoCs don't support 64-bit address memory
* pointers. So, this driver clears the AC64 bit of xhci->hcc_params
* to call dma_set_coherent_mask(dev, DMA_BIT_MASK(32)) in
* xhci_gen_setup().
*
* And, since the firmware/internal CPU control the USBSTS.STS_HALT
* and the process speed is down when the roothub port enters U3,
* long delay for the handshake of STS_HALT is neeed in xhci_suspend().
*/
if (xhci_rcar_is_gen2(hcd->self.controller) ||
xhci_rcar_is_gen3(hcd->self.controller)) {
xhci->quirks |= XHCI_NO_64BIT_SUPPORT | XHCI_SLOW_SUSPEND;
}
if (!xhci_rcar_wait_for_pll_active(hcd))
return -ETIMEDOUT;
xhci->quirks |= XHCI_TRUST_TX_LENGTH;
return xhci_rcar_download_firmware(hcd);
}
int xhci_rcar_resume_quirk(struct usb_hcd *hcd)
{
int ret;
ret = xhci_rcar_download_firmware(hcd);
if (!ret)
xhci_rcar_start(hcd);
return ret;
}
|
