diff options
| author | Peter Chen <peter.chen@nxp.com> | 2020-05-22 17:56:30 +0800 |
|---|---|---|
| committer | Peter Chen <peter.chen@nxp.com> | 2020-12-10 08:45:26 +0800 |
| commit | ed22764847e8100f0af9af91ccfa58e5c559bd47 (patch) | |
| tree | 6d6c023cbce3175eb30eaa8f18610b1e41298815 /drivers/usb/cdns3/host.c | |
| parent | cdd3013dcc5cf6b03150caac0b96212ab221cf7a (diff) | |
usb: cdns3: host: add .suspend_quirk for xhci-plat.c
cdns3 has some special PM sequence between xhci_bus_suspend and
xhci_suspend, add quirk to implement it.
Reviewed-by: Pawel Laszczak <pawell@cadence.com>
Signed-off-by: Peter Chen <peter.chen@nxp.com>
Diffstat (limited to 'drivers/usb/cdns3/host.c')
| -rw-r--r-- | drivers/usb/cdns3/host.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/drivers/usb/cdns3/host.c b/drivers/usb/cdns3/host.c index b3e2cb69762c..de8da737fa25 100644 --- a/drivers/usb/cdns3/host.c +++ b/drivers/usb/cdns3/host.c @@ -14,6 +14,18 @@ #include "drd.h" #include "host-export.h" #include <linux/usb/hcd.h> +#include "../host/xhci.h" +#include "../host/xhci-plat.h" + +#define XECP_PORT_CAP_REG 0x8000 +#define XECP_AUX_CTRL_REG1 0x8120 + +#define CFG_RXDET_P3_EN BIT(15) +#define LPM_2_STB_SWITCH_EN BIT(25) + +static const struct xhci_plat_priv xhci_plat_cdns3_xhci = { + .suspend_quirk = xhci_cdns3_suspend_quirk, +}; static int __cdns3_host_init(struct cdns3 *cdns) { @@ -39,6 +51,11 @@ static int __cdns3_host_init(struct cdns3 *cdns) goto err1; } + ret = platform_device_add_data(xhci, &xhci_plat_cdns3_xhci, + sizeof(struct xhci_plat_priv)); + if (ret) + goto err1; + ret = platform_device_add(xhci); if (ret) { dev_err(cdns->dev, "failed to register xHCI device\n"); @@ -56,6 +73,32 @@ err1: return ret; } +int xhci_cdns3_suspend_quirk(struct usb_hcd *hcd) +{ + struct xhci_hcd *xhci = hcd_to_xhci(hcd); + u32 value; + + if (pm_runtime_status_suspended(hcd->self.controller)) + return 0; + + /* set usbcmd.EU3S */ + value = readl(&xhci->op_regs->command); + value |= CMD_PM_INDEX; + writel(value, &xhci->op_regs->command); + + if (hcd->regs) { + value = readl(hcd->regs + XECP_AUX_CTRL_REG1); + value |= CFG_RXDET_P3_EN; + writel(value, hcd->regs + XECP_AUX_CTRL_REG1); + + value = readl(hcd->regs + XECP_PORT_CAP_REG); + value |= LPM_2_STB_SWITCH_EN; + writel(value, hcd->regs + XECP_PORT_CAP_REG); + } + + return 0; +} + static void cdns3_host_exit(struct cdns3 *cdns) { platform_device_unregister(cdns->host_dev); |