Contributors: 20
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Yoshihiro Shimoda |
676 |
56.15% |
13 |
36.11% |
| Biju Das |
246 |
20.43% |
3 |
8.33% |
| Arnd Bergmann |
111 |
9.22% |
1 |
2.78% |
| Felipe Balbi |
56 |
4.65% |
1 |
2.78% |
| Chunfeng Yun |
36 |
2.99% |
1 |
2.78% |
| Al Cooper |
18 |
1.50% |
1 |
2.78% |
| Sebastian Andrzej Siewior |
17 |
1.41% |
1 |
2.78% |
| Sage Sharp |
15 |
1.25% |
1 |
2.78% |
| Ran Wang |
5 |
0.42% |
1 |
2.78% |
| Vikas Sajjan |
4 |
0.33% |
1 |
2.78% |
| Simon Horman |
4 |
0.33% |
1 |
2.78% |
| Gregory CLEMENT |
3 |
0.25% |
2 |
5.56% |
| Wolfram Sang |
3 |
0.25% |
1 |
2.78% |
| Andrew Bresticker |
2 |
0.17% |
1 |
2.78% |
| Baolin Wang |
2 |
0.17% |
1 |
2.78% |
| Greg Kroah-Hartman |
2 |
0.17% |
2 |
5.56% |
| Uwe Kleine-König |
1 |
0.08% |
1 |
2.78% |
| Maxime Ripard |
1 |
0.08% |
1 |
2.78% |
| Mathias Nyman |
1 |
0.08% |
1 |
2.78% |
| Geert Uytterhoeven |
1 |
0.08% |
1 |
2.78% |
| Total |
1204 |
|
36 |
|
// 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/iopoll.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/of.h>
#include <linux/usb/phy.h>
#include <linux/reset.h>
#include "xhci.h"
#include "xhci-plat.h"
#include "xhci-rcar-regs.h"
#include "xhci-rzg3e-regs.h"
#include "xhci-rzv2m.h"
#define XHCI_RCAR_FIRMWARE_NAME_V1 "r8a779x_usb3_v1.dlmem"
#define XHCI_RCAR_FIRMWARE_NAME_V3 "r8a779x_usb3_v3.dlmem"
/*
* - The V3 firmware is for all R-Car Gen3
* - 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_V3);
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, "renesas,rcar-gen2-xhci");
}
static 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 void xhci_rzg3e_start(struct usb_hcd *hcd)
{
u32 int_en;
if (hcd->regs) {
/* Update the controller initial setting */
writel(0x03130200, hcd->regs + RZG3E_USB3_HOST_U3P0PIPESC(0));
writel(0x00160200, hcd->regs + RZG3E_USB3_HOST_U3P0PIPESC(1));
writel(0x03150000, hcd->regs + RZG3E_USB3_HOST_U3P0PIPESC(2));
writel(0x03130200, hcd->regs + RZG3E_USB3_HOST_U3P0PIPESC(3));
writel(0x00180000, hcd->regs + RZG3E_USB3_HOST_U3P0PIPESC(4));
/* Interrupt Enable */
int_en = readl(hcd->regs + RZG3E_USB3_HOST_INTEN);
int_en |= RZG3E_USB3_HOST_INTEN_ENA;
writel(int_en, hcd->regs + RZG3E_USB3_HOST_INTEN);
}
}
static int xhci_rzg3e_resume(struct usb_hcd *hcd)
{
struct xhci_hcd *xhci = hcd_to_xhci(hcd);
return reset_control_deassert(xhci->reset);
}
static int xhci_rzg3e_post_resume(struct usb_hcd *hcd)
{
xhci_rzg3e_start(hcd);
return 0;
}
static int xhci_rzg3e_suspend(struct usb_hcd *hcd)
{
struct xhci_hcd *xhci = hcd_to_xhci(hcd);
reset_control_assert(xhci->reset);
return 0;
}
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;
u32 data, val, temp;
/*
* According to the datasheet, "Upon the completion of FW Download,
* there is no need to write or reload FW".
*/
if (readl(regs + RCAR_USB3_DL_CTRL) & RCAR_USB3_DL_CTRL_FW_SUCCESS)
return 0;
/* request R-Car USB3.0 firmware */
retval = request_firmware(&fw, priv->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);
retval = readl_poll_timeout_atomic(regs + RCAR_USB3_DL_CTRL,
val, !(val & RCAR_USB3_DL_CTRL_FW_SET_DATA0),
1, 10000);
if (retval < 0)
break;
}
temp = readl(regs + RCAR_USB3_DL_CTRL);
temp &= ~RCAR_USB3_DL_CTRL_ENABLE;
writel(temp, regs + RCAR_USB3_DL_CTRL);
retval = readl_poll_timeout_atomic((regs + RCAR_USB3_DL_CTRL),
val, val & RCAR_USB3_DL_CTRL_FW_SUCCESS, 1, 10000);
release_firmware(fw);
return retval;
}
static bool xhci_rcar_wait_for_pll_active(struct usb_hcd *hcd)
{
int retval;
u32 val, mask = RCAR_USB3_AXH_STA_PLL_ACTIVE_MASK;
retval = readl_poll_timeout_atomic(hcd->regs + RCAR_USB3_AXH_STA,
val, (val & mask) == mask, 1, 1000);
return !retval;
}
/* This function needs to initialize a "phy" of usb before */
static int xhci_rcar_init_quirk(struct usb_hcd *hcd)
{
/* If hcd->regs is NULL, we don't just call the following function */
if (!hcd->regs)
return 0;
if (!xhci_rcar_wait_for_pll_active(hcd))
return -ETIMEDOUT;
return xhci_rcar_download_firmware(hcd);
}
static 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;
}
/*
* 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() by using the XHCI_NO_64BIT_SUPPORT quirk.
*
* 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()
* by using the XHCI_SLOW_SUSPEND quirk.
*/
#define SET_XHCI_PLAT_PRIV_FOR_RCAR(firmware) \
.firmware_name = firmware, \
.quirks = XHCI_NO_64BIT_SUPPORT | XHCI_SLOW_SUSPEND, \
.init_quirk = xhci_rcar_init_quirk, \
.plat_start = xhci_rcar_start, \
.resume_quirk = xhci_rcar_resume_quirk,
static const struct xhci_plat_priv xhci_plat_renesas_rcar_gen2 = {
SET_XHCI_PLAT_PRIV_FOR_RCAR(XHCI_RCAR_FIRMWARE_NAME_V1)
};
static const struct xhci_plat_priv xhci_plat_renesas_rcar_gen3 = {
SET_XHCI_PLAT_PRIV_FOR_RCAR(XHCI_RCAR_FIRMWARE_NAME_V3)
};
static const struct xhci_plat_priv xhci_plat_renesas_rzv2m = {
.quirks = XHCI_NO_64BIT_SUPPORT | XHCI_SLOW_SUSPEND,
.init_quirk = xhci_rzv2m_init_quirk,
.plat_start = xhci_rzv2m_start,
};
static const struct xhci_plat_priv xhci_plat_renesas_rzg3e = {
.quirks = XHCI_NO_64BIT_SUPPORT | XHCI_RESET_ON_RESUME | XHCI_SUSPEND_RESUME_CLKS,
.plat_start = xhci_rzg3e_start,
.suspend_quirk = xhci_rzg3e_suspend,
.resume_quirk = xhci_rzg3e_resume,
.post_resume_quirk = xhci_rzg3e_post_resume,
};
static const struct of_device_id usb_xhci_of_match[] = {
{
.compatible = "renesas,xhci-r8a7790",
.data = &xhci_plat_renesas_rcar_gen2,
}, {
.compatible = "renesas,xhci-r8a7791",
.data = &xhci_plat_renesas_rcar_gen2,
}, {
.compatible = "renesas,xhci-r8a7793",
.data = &xhci_plat_renesas_rcar_gen2,
}, {
.compatible = "renesas,xhci-r8a7795",
.data = &xhci_plat_renesas_rcar_gen3,
}, {
.compatible = "renesas,xhci-r8a7796",
.data = &xhci_plat_renesas_rcar_gen3,
}, {
.compatible = "renesas,r9a09g047-xhci",
.data = &xhci_plat_renesas_rzg3e,
}, {
.compatible = "renesas,rcar-gen2-xhci",
.data = &xhci_plat_renesas_rcar_gen2,
}, {
.compatible = "renesas,rcar-gen3-xhci",
.data = &xhci_plat_renesas_rcar_gen3,
}, {
.compatible = "renesas,rzv2m-xhci",
.data = &xhci_plat_renesas_rzv2m,
},
{ },
};
MODULE_DEVICE_TABLE(of, usb_xhci_of_match);
static int xhci_renesas_probe(struct platform_device *pdev)
{
const struct xhci_plat_priv *priv_match;
priv_match = of_device_get_match_data(&pdev->dev);
return xhci_plat_probe(pdev, NULL, priv_match);
}
static struct platform_driver usb_xhci_renesas_driver = {
.probe = xhci_renesas_probe,
.remove = xhci_plat_remove,
.shutdown = usb_hcd_platform_shutdown,
.driver = {
.name = "xhci-renesas-hcd",
.pm = &xhci_plat_pm_ops,
.of_match_table = usb_xhci_of_match,
},
};
module_platform_driver(usb_xhci_renesas_driver);
MODULE_DESCRIPTION("xHCI Platform Host Controller Driver for Renesas R-Car and RZ");
MODULE_LICENSE("GPL");