diff options
| author | Biju Das <biju.das.jz@bp.renesas.com> | 2023-01-21 17:58:50 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-01-25 17:48:17 +0300 |
| commit | c52c9acc415eb6ff54f658492f8c53da0fc3528a (patch) | |
| tree | 0b538ef22919c8ede81156de76b7082399148684 /drivers/usb/host/xhci-rzv2m.c | |
| parent | 224eb5311d6a8c180932465873d809b48a2470bf (diff) | |
| download | linux-c52c9acc415eb6ff54f658492f8c53da0fc3528a.tar.xz | |
xhci: host: Add Renesas RZ/V2M SoC support
RZ/V2M is similar to R-Car XHCI but it doesn't require any
firmware, we need to reset the USB Host reset release in DRD Module
before accessing host registers.
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Link: https://lore.kernel.org/r/20230121145853.4792-10-biju.das.jz@bp.renesas.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/host/xhci-rzv2m.c')
| -rw-r--r-- | drivers/usb/host/xhci-rzv2m.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/drivers/usb/host/xhci-rzv2m.c b/drivers/usb/host/xhci-rzv2m.c new file mode 100644 index 000000000000..ec65b24eafa8 --- /dev/null +++ b/drivers/usb/host/xhci-rzv2m.c @@ -0,0 +1,38 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * xHCI host controller driver for RZ/V2M + * + * Copyright (C) 2022 Renesas Electronics Corporation + */ + +#include <linux/usb/rzv2m_usb3drd.h> +#include "xhci-plat.h" +#include "xhci-rzv2m.h" + +#define RZV2M_USB3_INTEN 0x1044 /* Interrupt Enable */ + +#define RZV2M_USB3_INT_XHC_ENA BIT(0) +#define RZV2M_USB3_INT_HSE_ENA BIT(2) +#define RZV2M_USB3_INT_ENA_VAL (RZV2M_USB3_INT_XHC_ENA \ + | RZV2M_USB3_INT_HSE_ENA) + +int xhci_rzv2m_init_quirk(struct usb_hcd *hcd) +{ + struct device *dev = hcd->self.controller; + + rzv2m_usb3drd_reset(dev->parent, true); + + return 0; +} + +void xhci_rzv2m_start(struct usb_hcd *hcd) +{ + u32 int_en; + + if (hcd->regs) { + /* Interrupt Enable */ + int_en = readl(hcd->regs + RZV2M_USB3_INTEN); + int_en |= RZV2M_USB3_INT_ENA_VAL; + writel(int_en, hcd->regs + RZV2M_USB3_INTEN); + } +} |