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-rw-r--r--drivers/usb/host/Kconfig8
-rw-r--r--drivers/usb/host/Makefile3
-rw-r--r--drivers/usb/host/xhci-plat.c19
-rw-r--r--drivers/usb/host/xhci-rcar.c148
-rw-r--r--drivers/usb/host/xhci-rcar.h27
5 files changed, 205 insertions, 0 deletions
diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index 03314f861bee..82800a775501 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -37,6 +37,14 @@ config USB_XHCI_MVEBU
37 Say 'Y' to enable the support for the xHCI host controller 37 Say 'Y' to enable the support for the xHCI host controller
38 found in Marvell Armada 375/38x ARM SOCs. 38 found in Marvell Armada 375/38x ARM SOCs.
39 39
40config USB_XHCI_RCAR
41 tristate "xHCI support for Renesas R-Car SoCs"
42 select USB_XHCI_PLATFORM
43 depends on ARCH_SHMOBILE || COMPILE_TEST
44 ---help---
45 Say 'Y' to enable the support for the xHCI host controller
46 found in Renesas R-Car ARM SoCs.
47
40endif # USB_XHCI_HCD 48endif # USB_XHCI_HCD
41 49
42config USB_EHCI_HCD 50config USB_EHCI_HCD
diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
index af89a903d97e..144c038ef70f 100644
--- a/drivers/usb/host/Makefile
+++ b/drivers/usb/host/Makefile
@@ -22,6 +22,9 @@ ifneq ($(CONFIG_USB_XHCI_PLATFORM), )
22ifneq ($(CONFIG_USB_XHCI_MVEBU), ) 22ifneq ($(CONFIG_USB_XHCI_MVEBU), )
23 xhci-hcd-y += xhci-mvebu.o 23 xhci-hcd-y += xhci-mvebu.o
24endif 24endif
25ifneq ($(CONFIG_USB_XHCI_RCAR), )
26 xhci-hcd-y += xhci-rcar.o
27endif
25endif 28endif
26 29
27obj-$(CONFIG_USB_WHCI_HCD) += whci/ 30obj-$(CONFIG_USB_WHCI_HCD) += whci/
diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c
index 794219d8d2a9..1a0cf9f31e43 100644
--- a/drivers/usb/host/xhci-plat.c
+++ b/drivers/usb/host/xhci-plat.c
@@ -21,6 +21,7 @@
21 21
22#include "xhci.h" 22#include "xhci.h"
23#include "xhci-mvebu.h" 23#include "xhci-mvebu.h"
24#include "xhci-rcar.h"
24 25
25static void xhci_plat_quirks(struct device *dev, struct xhci_hcd *xhci) 26static void xhci_plat_quirks(struct device *dev, struct xhci_hcd *xhci)
26{ 27{
@@ -35,11 +36,27 @@ static void xhci_plat_quirks(struct device *dev, struct xhci_hcd *xhci)
35/* called during probe() after chip reset completes */ 36/* called during probe() after chip reset completes */
36static int xhci_plat_setup(struct usb_hcd *hcd) 37static int xhci_plat_setup(struct usb_hcd *hcd)
37{ 38{
39 struct device_node *of_node = hcd->self.controller->of_node;
40 int ret;
41
42 if (of_device_is_compatible(of_node, "renesas,xhci-r8a7790") ||
43 of_device_is_compatible(of_node, "renesas,xhci-r8a7791")) {
44 ret = xhci_rcar_init_quirk(hcd);
45 if (ret)
46 return ret;
47 }
48
38 return xhci_gen_setup(hcd, xhci_plat_quirks); 49 return xhci_gen_setup(hcd, xhci_plat_quirks);
39} 50}
40 51
41static int xhci_plat_start(struct usb_hcd *hcd) 52static int xhci_plat_start(struct usb_hcd *hcd)
42{ 53{
54 struct device_node *of_node = hcd->self.controller->of_node;
55
56 if (of_device_is_compatible(of_node, "renesas,xhci-r8a7790") ||
57 of_device_is_compatible(of_node, "renesas,xhci-r8a7791"))
58 xhci_rcar_start(hcd);
59
43 return xhci_run(hcd); 60 return xhci_run(hcd);
44} 61}
45 62
@@ -263,6 +280,8 @@ static const struct of_device_id usb_xhci_of_match[] = {
263 { .compatible = "xhci-platform" }, 280 { .compatible = "xhci-platform" },
264 { .compatible = "marvell,armada-375-xhci"}, 281 { .compatible = "marvell,armada-375-xhci"},
265 { .compatible = "marvell,armada-380-xhci"}, 282 { .compatible = "marvell,armada-380-xhci"},
283 { .compatible = "renesas,xhci-r8a7790"},
284 { .compatible = "renesas,xhci-r8a7791"},
266 { }, 285 { },
267}; 286};
268MODULE_DEVICE_TABLE(of, usb_xhci_of_match); 287MODULE_DEVICE_TABLE(of, usb_xhci_of_match);
diff --git a/drivers/usb/host/xhci-rcar.c b/drivers/usb/host/xhci-rcar.c
new file mode 100644
index 000000000000..ff0d1b44ea58
--- /dev/null
+++ b/drivers/usb/host/xhci-rcar.c
@@ -0,0 +1,148 @@
1/*
2 * xHCI host controller driver for R-Car SoCs
3 *
4 * Copyright (C) 2014 Renesas Electronics Corporation
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * version 2 as published by the Free Software Foundation.
9 */
10
11#include <linux/firmware.h>
12#include <linux/module.h>
13#include <linux/platform_device.h>
14#include <linux/usb/phy.h>
15
16#include "xhci.h"
17#include "xhci-rcar.h"
18
19#define FIRMWARE_NAME "r8a779x_usb3_v1.dlmem"
20MODULE_FIRMWARE(FIRMWARE_NAME);
21
22/*** Register Offset ***/
23#define RCAR_USB3_INT_ENA 0x224 /* Interrupt Enable */
24#define RCAR_USB3_DL_CTRL 0x250 /* FW Download Control & Status */
25#define RCAR_USB3_FW_DATA0 0x258 /* FW Data0 */
26
27#define RCAR_USB3_LCLK 0xa44 /* LCLK Select */
28#define RCAR_USB3_CONF1 0xa48 /* USB3.0 Configuration1 */
29#define RCAR_USB3_CONF2 0xa5c /* USB3.0 Configuration2 */
30#define RCAR_USB3_CONF3 0xaa8 /* USB3.0 Configuration3 */
31#define RCAR_USB3_RX_POL 0xab0 /* USB3.0 RX Polarity */
32#define RCAR_USB3_TX_POL 0xab8 /* USB3.0 TX Polarity */
33
34/*** Register Settings ***/
35/* Interrupt Enable */
36#define RCAR_USB3_INT_XHC_ENA 0x00000001
37#define RCAR_USB3_INT_PME_ENA 0x00000002
38#define RCAR_USB3_INT_HSE_ENA 0x00000004
39#define RCAR_USB3_INT_ENA_VAL (RCAR_USB3_INT_XHC_ENA | \
40 RCAR_USB3_INT_PME_ENA | RCAR_USB3_INT_HSE_ENA)
41
42/* FW Download Control & Status */
43#define RCAR_USB3_DL_CTRL_ENABLE 0x00000001
44#define RCAR_USB3_DL_CTRL_FW_SUCCESS 0x00000010
45#define RCAR_USB3_DL_CTRL_FW_SET_DATA0 0x00000100
46
47/* LCLK Select */
48#define RCAR_USB3_LCLK_ENA_VAL 0x01030001
49
50/* USB3.0 Configuration */
51#define RCAR_USB3_CONF1_VAL 0x00030204
52#define RCAR_USB3_CONF2_VAL 0x00030300
53#define RCAR_USB3_CONF3_VAL 0x13802007
54
55/* USB3.0 Polarity */
56#define RCAR_USB3_RX_POL_VAL BIT(21)
57#define RCAR_USB3_TX_POL_VAL BIT(4)
58
59void xhci_rcar_start(struct usb_hcd *hcd)
60{
61 u32 temp;
62
63 if (hcd->regs != NULL) {
64 /* Interrupt Enable */
65 temp = readl(hcd->regs + RCAR_USB3_INT_ENA);
66 temp |= RCAR_USB3_INT_ENA_VAL;
67 writel(temp, hcd->regs + RCAR_USB3_INT_ENA);
68 /* LCLK Select */
69 writel(RCAR_USB3_LCLK_ENA_VAL, hcd->regs + RCAR_USB3_LCLK);
70 /* USB3.0 Configuration */
71 writel(RCAR_USB3_CONF1_VAL, hcd->regs + RCAR_USB3_CONF1);
72 writel(RCAR_USB3_CONF2_VAL, hcd->regs + RCAR_USB3_CONF2);
73 writel(RCAR_USB3_CONF3_VAL, hcd->regs + RCAR_USB3_CONF3);
74 /* USB3.0 Polarity */
75 writel(RCAR_USB3_RX_POL_VAL, hcd->regs + RCAR_USB3_RX_POL);
76 writel(RCAR_USB3_TX_POL_VAL, hcd->regs + RCAR_USB3_TX_POL);
77 }
78}
79
80static int xhci_rcar_download_firmware(struct device *dev, void __iomem *regs)
81{
82 const struct firmware *fw;
83 int retval, index, j, time;
84 int timeout = 10000;
85 u32 data, val, temp;
86
87 /* request R-Car USB3.0 firmware */
88 retval = request_firmware(&fw, FIRMWARE_NAME, dev);
89 if (retval)
90 return retval;
91
92 /* download R-Car USB3.0 firmware */
93 temp = readl(regs + RCAR_USB3_DL_CTRL);
94 temp |= RCAR_USB3_DL_CTRL_ENABLE;
95 writel(temp, regs + RCAR_USB3_DL_CTRL);
96
97 for (index = 0; index < fw->size; index += 4) {
98 /* to avoid reading beyond the end of the buffer */
99 for (data = 0, j = 3; j >= 0; j--) {
100 if ((j + index) < fw->size)
101 data |= fw->data[index + j] << (8 * j);
102 }
103 writel(data, regs + RCAR_USB3_FW_DATA0);
104 temp = readl(regs + RCAR_USB3_DL_CTRL);
105 temp |= RCAR_USB3_DL_CTRL_FW_SET_DATA0;
106 writel(temp, regs + RCAR_USB3_DL_CTRL);
107
108 for (time = 0; time < timeout; time++) {
109 val = readl(regs + RCAR_USB3_DL_CTRL);
110 if ((val & RCAR_USB3_DL_CTRL_FW_SET_DATA0) == 0)
111 break;
112 udelay(1);
113 }
114 if (time == timeout) {
115 retval = -ETIMEDOUT;
116 break;
117 }
118 }
119
120 temp = readl(regs + RCAR_USB3_DL_CTRL);
121 temp &= ~RCAR_USB3_DL_CTRL_ENABLE;
122 writel(temp, regs + RCAR_USB3_DL_CTRL);
123
124 for (time = 0; time < timeout; time++) {
125 val = readl(regs + RCAR_USB3_DL_CTRL);
126 if (val & RCAR_USB3_DL_CTRL_FW_SUCCESS) {
127 retval = 0;
128 break;
129 }
130 udelay(1);
131 }
132 if (time == timeout)
133 retval = -ETIMEDOUT;
134
135 release_firmware(fw);
136
137 return retval;
138}
139
140/* This function needs to initialize a "phy" of usb before */
141int xhci_rcar_init_quirk(struct usb_hcd *hcd)
142{
143 /* If hcd->regs is NULL, we don't just call the following function */
144 if (!hcd->regs)
145 return 0;
146
147 return xhci_rcar_download_firmware(hcd->self.controller, hcd->regs);
148}
diff --git a/drivers/usb/host/xhci-rcar.h b/drivers/usb/host/xhci-rcar.h
new file mode 100644
index 000000000000..58501256715d
--- /dev/null
+++ b/drivers/usb/host/xhci-rcar.h
@@ -0,0 +1,27 @@
1/*
2 * drivers/usb/host/xhci-rcar.h
3 *
4 * Copyright (C) 2014 Renesas Electronics Corporation
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * version 2 as published by the Free Software Foundation.
9 */
10
11#ifndef _XHCI_RCAR_H
12#define _XHCI_RCAR_H
13
14#if IS_ENABLED(CONFIG_USB_XHCI_RCAR)
15void xhci_rcar_start(struct usb_hcd *hcd);
16int xhci_rcar_init_quirk(struct usb_hcd *hcd);
17#else
18static inline void xhci_rcar_start(struct usb_hcd *hcd)
19{
20}
21
22static inline int xhci_rcar_init_quirk(struct usb_hcd *hcd)
23{
24 return 0;
25}
26#endif
27#endif /* _XHCI_RCAR_H */
generated by cgit v1.2.2 (git 2.25.0) at 2025-04-25 05:30:32 -0400