diff options
Diffstat (limited to 'kernel/drivers/usb/host/xhci-rcar.c')
| -rw-r--r-- | kernel/drivers/usb/host/xhci-rcar.c | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/kernel/drivers/usb/host/xhci-rcar.c b/kernel/drivers/usb/host/xhci-rcar.c new file mode 100644 index 000000000..ff0d1b44e --- /dev/null +++ b/kernel/drivers/usb/host/xhci-rcar.c @@ -0,0 +1,148 @@ +/* + * xHCI host controller driver for R-Car SoCs + * + * Copyright (C) 2014 Renesas Electronics Corporation + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * version 2 as published by the Free Software Foundation. + */ + +#include <linux/firmware.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/usb/phy.h> + +#include "xhci.h" +#include "xhci-rcar.h" + +#define FIRMWARE_NAME "r8a779x_usb3_v1.dlmem" +MODULE_FIRMWARE(FIRMWARE_NAME); + +/*** Register Offset ***/ +#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 ***/ +/* 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) + +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); + /* 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_download_firmware(struct device *dev, void __iomem *regs) +{ + const struct firmware *fw; + int retval, index, j, time; + int timeout = 10000; + u32 data, val, temp; + + /* 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; +} + +/* This function needs to initialize a "phy" of usb before */ +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; + + return xhci_rcar_download_firmware(hcd->self.controller, hcd->regs); +} |