// 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 "xhci.h" #include "xhci-plat.h" #include "xhci-rzv2m.h" #define XHCI_RCAR_FIRMWARE_NAME_V1 … #define XHCI_RCAR_FIRMWARE_NAME_V3 … /* * - 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(…); MODULE_FIRMWARE(…); /*** Register Offset ***/ #define RCAR_USB3_AXH_STA … #define RCAR_USB3_INT_ENA … #define RCAR_USB3_DL_CTRL … #define RCAR_USB3_FW_DATA0 … #define RCAR_USB3_LCLK … #define RCAR_USB3_CONF1 … #define RCAR_USB3_CONF2 … #define RCAR_USB3_CONF3 … #define RCAR_USB3_RX_POL … #define RCAR_USB3_TX_POL … /*** Register Settings ***/ /* AXI Host Control Status */ #define RCAR_USB3_AXH_STA_B3_PLL_ACTIVE … #define RCAR_USB3_AXH_STA_B2_PLL_ACTIVE … #define RCAR_USB3_AXH_STA_PLL_ACTIVE_MASK … /* Interrupt Enable */ #define RCAR_USB3_INT_XHC_ENA … #define RCAR_USB3_INT_PME_ENA … #define RCAR_USB3_INT_HSE_ENA … #define RCAR_USB3_INT_ENA_VAL … /* FW Download Control & Status */ #define RCAR_USB3_DL_CTRL_ENABLE … #define RCAR_USB3_DL_CTRL_FW_SUCCESS … #define RCAR_USB3_DL_CTRL_FW_SET_DATA0 … /* LCLK Select */ #define RCAR_USB3_LCLK_ENA_VAL … /* USB3.0 Configuration */ #define RCAR_USB3_CONF1_VAL … #define RCAR_USB3_CONF2_VAL … #define RCAR_USB3_CONF3_VAL … /* USB3.0 Polarity */ #define RCAR_USB3_RX_POL_VAL … #define RCAR_USB3_TX_POL_VAL … static void xhci_rcar_start_gen2(struct usb_hcd *hcd) { … } static int xhci_rcar_is_gen2(struct device *dev) { … } static void xhci_rcar_start(struct usb_hcd *hcd) { … } static int xhci_rcar_download_firmware(struct usb_hcd *hcd) { … } static bool xhci_rcar_wait_for_pll_active(struct usb_hcd *hcd) { … } /* This function needs to initialize a "phy" of usb before */ static int xhci_rcar_init_quirk(struct usb_hcd *hcd) { … } static int xhci_rcar_resume_quirk(struct usb_hcd *hcd) { … } /* * 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) … static const struct xhci_plat_priv xhci_plat_renesas_rcar_gen2 = …; static const struct xhci_plat_priv xhci_plat_renesas_rcar_gen3 = …; static const struct xhci_plat_priv xhci_plat_renesas_rzv2m = …; static const struct of_device_id usb_xhci_of_match[] = …; MODULE_DEVICE_TABLE(of, usb_xhci_of_match); static int xhci_renesas_probe(struct platform_device *pdev) { … } static struct platform_driver usb_xhci_renesas_driver = …; module_platform_driver(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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