1 // SPDX-License-Identifier: GPL-2.0
3 * xHCI host controller driver for R-Car SoCs
5 * Copyright (C) 2014 Renesas Electronics Corporation
8 #include <linux/firmware.h>
9 #include <linux/module.h>
10 #include <linux/platform_device.h>
12 #include <linux/usb/phy.h>
13 #include <linux/sys_soc.h>
16 #include "xhci-plat.h"
17 #include "xhci-rcar.h"
20 * - The V3 firmware is for r8a7796 (with good performance) and r8a7795 es2.0
22 * - The V2 firmware can be used on both r8a7795 (es1.x) and r8a7796.
23 * - The V2 firmware is possible to use on R-Car Gen2. However, the V2 causes
24 * performance degradation. So, this driver continues to use the V1 if R-Car
26 * - The V1 firmware is impossible to use on R-Car Gen3.
28 MODULE_FIRMWARE(XHCI_RCAR_FIRMWARE_NAME_V1
);
29 MODULE_FIRMWARE(XHCI_RCAR_FIRMWARE_NAME_V2
);
30 MODULE_FIRMWARE(XHCI_RCAR_FIRMWARE_NAME_V3
);
32 /*** Register Offset ***/
33 #define RCAR_USB3_INT_ENA 0x224 /* Interrupt Enable */
34 #define RCAR_USB3_DL_CTRL 0x250 /* FW Download Control & Status */
35 #define RCAR_USB3_FW_DATA0 0x258 /* FW Data0 */
37 #define RCAR_USB3_LCLK 0xa44 /* LCLK Select */
38 #define RCAR_USB3_CONF1 0xa48 /* USB3.0 Configuration1 */
39 #define RCAR_USB3_CONF2 0xa5c /* USB3.0 Configuration2 */
40 #define RCAR_USB3_CONF3 0xaa8 /* USB3.0 Configuration3 */
41 #define RCAR_USB3_RX_POL 0xab0 /* USB3.0 RX Polarity */
42 #define RCAR_USB3_TX_POL 0xab8 /* USB3.0 TX Polarity */
44 /*** Register Settings ***/
45 /* Interrupt Enable */
46 #define RCAR_USB3_INT_XHC_ENA 0x00000001
47 #define RCAR_USB3_INT_PME_ENA 0x00000002
48 #define RCAR_USB3_INT_HSE_ENA 0x00000004
49 #define RCAR_USB3_INT_ENA_VAL (RCAR_USB3_INT_XHC_ENA | \
50 RCAR_USB3_INT_PME_ENA | RCAR_USB3_INT_HSE_ENA)
52 /* FW Download Control & Status */
53 #define RCAR_USB3_DL_CTRL_ENABLE 0x00000001
54 #define RCAR_USB3_DL_CTRL_FW_SUCCESS 0x00000010
55 #define RCAR_USB3_DL_CTRL_FW_SET_DATA0 0x00000100
58 #define RCAR_USB3_LCLK_ENA_VAL 0x01030001
60 /* USB3.0 Configuration */
61 #define RCAR_USB3_CONF1_VAL 0x00030204
62 #define RCAR_USB3_CONF2_VAL 0x00030300
63 #define RCAR_USB3_CONF3_VAL 0x13802007
66 #define RCAR_USB3_RX_POL_VAL BIT(21)
67 #define RCAR_USB3_TX_POL_VAL BIT(4)
69 /* For soc_device_attribute */
70 #define RCAR_XHCI_FIRMWARE_V2 BIT(0) /* FIRMWARE V2 */
71 #define RCAR_XHCI_FIRMWARE_V3 BIT(1) /* FIRMWARE V3 */
73 static const struct soc_device_attribute rcar_quirks_match
[] = {
75 .soc_id
= "r8a7795", .revision
= "ES1.*",
76 .data
= (void *)RCAR_XHCI_FIRMWARE_V2
,
80 .data
= (void *)RCAR_XHCI_FIRMWARE_V3
,
84 .data
= (void *)RCAR_XHCI_FIRMWARE_V3
,
88 .data
= (void *)RCAR_XHCI_FIRMWARE_V3
,
93 static void xhci_rcar_start_gen2(struct usb_hcd
*hcd
)
96 writel(RCAR_USB3_LCLK_ENA_VAL
, hcd
->regs
+ RCAR_USB3_LCLK
);
97 /* USB3.0 Configuration */
98 writel(RCAR_USB3_CONF1_VAL
, hcd
->regs
+ RCAR_USB3_CONF1
);
99 writel(RCAR_USB3_CONF2_VAL
, hcd
->regs
+ RCAR_USB3_CONF2
);
100 writel(RCAR_USB3_CONF3_VAL
, hcd
->regs
+ RCAR_USB3_CONF3
);
101 /* USB3.0 Polarity */
102 writel(RCAR_USB3_RX_POL_VAL
, hcd
->regs
+ RCAR_USB3_RX_POL
);
103 writel(RCAR_USB3_TX_POL_VAL
, hcd
->regs
+ RCAR_USB3_TX_POL
);
106 static int xhci_rcar_is_gen2(struct device
*dev
)
108 struct device_node
*node
= dev
->of_node
;
110 return of_device_is_compatible(node
, "renesas,xhci-r8a7790") ||
111 of_device_is_compatible(node
, "renesas,xhci-r8a7791") ||
112 of_device_is_compatible(node
, "renesas,xhci-r8a7793") ||
113 of_device_is_compatible(node
, "renensas,rcar-gen2-xhci");
116 static int xhci_rcar_is_gen3(struct device
*dev
)
118 struct device_node
*node
= dev
->of_node
;
120 return of_device_is_compatible(node
, "renesas,xhci-r8a7795") ||
121 of_device_is_compatible(node
, "renesas,xhci-r8a7796") ||
122 of_device_is_compatible(node
, "renesas,rcar-gen3-xhci");
125 void xhci_rcar_start(struct usb_hcd
*hcd
)
129 if (hcd
->regs
!= NULL
) {
130 /* Interrupt Enable */
131 temp
= readl(hcd
->regs
+ RCAR_USB3_INT_ENA
);
132 temp
|= RCAR_USB3_INT_ENA_VAL
;
133 writel(temp
, hcd
->regs
+ RCAR_USB3_INT_ENA
);
134 if (xhci_rcar_is_gen2(hcd
->self
.controller
))
135 xhci_rcar_start_gen2(hcd
);
139 static int xhci_rcar_download_firmware(struct usb_hcd
*hcd
)
141 struct device
*dev
= hcd
->self
.controller
;
142 void __iomem
*regs
= hcd
->regs
;
143 struct xhci_plat_priv
*priv
= hcd_to_xhci_priv(hcd
);
144 const struct firmware
*fw
;
145 int retval
, index
, j
, time
;
149 const struct soc_device_attribute
*attr
;
150 const char *firmware_name
;
152 attr
= soc_device_match(rcar_quirks_match
);
154 quirks
= (uintptr_t)attr
->data
;
156 if (quirks
& RCAR_XHCI_FIRMWARE_V2
)
157 firmware_name
= XHCI_RCAR_FIRMWARE_NAME_V2
;
158 else if (quirks
& RCAR_XHCI_FIRMWARE_V3
)
159 firmware_name
= XHCI_RCAR_FIRMWARE_NAME_V3
;
161 firmware_name
= priv
->firmware_name
;
163 /* request R-Car USB3.0 firmware */
164 retval
= request_firmware(&fw
, firmware_name
, dev
);
168 /* download R-Car USB3.0 firmware */
169 temp
= readl(regs
+ RCAR_USB3_DL_CTRL
);
170 temp
|= RCAR_USB3_DL_CTRL_ENABLE
;
171 writel(temp
, regs
+ RCAR_USB3_DL_CTRL
);
173 for (index
= 0; index
< fw
->size
; index
+= 4) {
174 /* to avoid reading beyond the end of the buffer */
175 for (data
= 0, j
= 3; j
>= 0; j
--) {
176 if ((j
+ index
) < fw
->size
)
177 data
|= fw
->data
[index
+ j
] << (8 * j
);
179 writel(data
, regs
+ RCAR_USB3_FW_DATA0
);
180 temp
= readl(regs
+ RCAR_USB3_DL_CTRL
);
181 temp
|= RCAR_USB3_DL_CTRL_FW_SET_DATA0
;
182 writel(temp
, regs
+ RCAR_USB3_DL_CTRL
);
184 for (time
= 0; time
< timeout
; time
++) {
185 val
= readl(regs
+ RCAR_USB3_DL_CTRL
);
186 if ((val
& RCAR_USB3_DL_CTRL_FW_SET_DATA0
) == 0)
190 if (time
== timeout
) {
196 temp
= readl(regs
+ RCAR_USB3_DL_CTRL
);
197 temp
&= ~RCAR_USB3_DL_CTRL_ENABLE
;
198 writel(temp
, regs
+ RCAR_USB3_DL_CTRL
);
200 for (time
= 0; time
< timeout
; time
++) {
201 val
= readl(regs
+ RCAR_USB3_DL_CTRL
);
202 if (val
& RCAR_USB3_DL_CTRL_FW_SUCCESS
) {
211 release_firmware(fw
);
216 /* This function needs to initialize a "phy" of usb before */
217 int xhci_rcar_init_quirk(struct usb_hcd
*hcd
)
219 struct xhci_hcd
*xhci
= hcd_to_xhci(hcd
);
221 /* If hcd->regs is NULL, we don't just call the following function */
226 * On R-Car Gen2 and Gen3, the AC64 bit (bit 0) of HCCPARAMS1 is set
227 * to 1. However, these SoCs don't support 64-bit address memory
228 * pointers. So, this driver clears the AC64 bit of xhci->hcc_params
229 * to call dma_set_coherent_mask(dev, DMA_BIT_MASK(32)) in
232 if (xhci_rcar_is_gen2(hcd
->self
.controller
) ||
233 xhci_rcar_is_gen3(hcd
->self
.controller
))
234 xhci
->quirks
|= XHCI_NO_64BIT_SUPPORT
;
236 return xhci_rcar_download_firmware(hcd
);
239 int xhci_rcar_resume_quirk(struct usb_hcd
*hcd
)
243 ret
= xhci_rcar_download_firmware(hcd
);
245 xhci_rcar_start(hcd
);