USB: ehci-fsl: add MPC5121E specific suspend and resume
Signed-off-by: Anatolij Gustschin <agust@denx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/usb/host/ehci-fsl.c b/drivers/usb/host/ehci-fsl.c
index 5c761df..caf3d4a 100644
--- a/drivers/usb/host/ehci-fsl.c
+++ b/drivers/usb/host/ehci-fsl.c
@@ -328,6 +328,149 @@
#ifdef CONFIG_PM
+#ifdef CONFIG_PPC_MPC512x
+static int ehci_fsl_mpc512x_drv_suspend(struct device *dev)
+{
+ struct usb_hcd *hcd = dev_get_drvdata(dev);
+ struct ehci_hcd *ehci = hcd_to_ehci(hcd);
+ struct fsl_usb2_platform_data *pdata = dev->platform_data;
+ u32 tmp;
+
+#ifdef DEBUG
+ u32 mode = ehci_readl(ehci, hcd->regs + FSL_SOC_USB_USBMODE);
+ mode &= USBMODE_CM_MASK;
+ tmp = ehci_readl(ehci, hcd->regs + 0x140); /* usbcmd */
+
+ dev_dbg(dev, "suspend=%d already_suspended=%d "
+ "mode=%d usbcmd %08x\n", pdata->suspended,
+ pdata->already_suspended, mode, tmp);
+#endif
+
+ /*
+ * If the controller is already suspended, then this must be a
+ * PM suspend. Remember this fact, so that we will leave the
+ * controller suspended at PM resume time.
+ */
+ if (pdata->suspended) {
+ dev_dbg(dev, "already suspended, leaving early\n");
+ pdata->already_suspended = 1;
+ return 0;
+ }
+
+ dev_dbg(dev, "suspending...\n");
+
+ hcd->state = HC_STATE_SUSPENDED;
+ dev->power.power_state = PMSG_SUSPEND;
+
+ /* ignore non-host interrupts */
+ clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
+
+ /* stop the controller */
+ tmp = ehci_readl(ehci, &ehci->regs->command);
+ tmp &= ~CMD_RUN;
+ ehci_writel(ehci, tmp, &ehci->regs->command);
+
+ /* save EHCI registers */
+ pdata->pm_command = ehci_readl(ehci, &ehci->regs->command);
+ pdata->pm_command &= ~CMD_RUN;
+ pdata->pm_status = ehci_readl(ehci, &ehci->regs->status);
+ pdata->pm_intr_enable = ehci_readl(ehci, &ehci->regs->intr_enable);
+ pdata->pm_frame_index = ehci_readl(ehci, &ehci->regs->frame_index);
+ pdata->pm_segment = ehci_readl(ehci, &ehci->regs->segment);
+ pdata->pm_frame_list = ehci_readl(ehci, &ehci->regs->frame_list);
+ pdata->pm_async_next = ehci_readl(ehci, &ehci->regs->async_next);
+ pdata->pm_configured_flag =
+ ehci_readl(ehci, &ehci->regs->configured_flag);
+ pdata->pm_portsc = ehci_readl(ehci, &ehci->regs->port_status[0]);
+ pdata->pm_usbgenctrl = ehci_readl(ehci,
+ hcd->regs + FSL_SOC_USB_USBGENCTRL);
+
+ /* clear the W1C bits */
+ pdata->pm_portsc &= cpu_to_hc32(ehci, ~PORT_RWC_BITS);
+
+ pdata->suspended = 1;
+
+ /* clear PP to cut power to the port */
+ tmp = ehci_readl(ehci, &ehci->regs->port_status[0]);
+ tmp &= ~PORT_POWER;
+ ehci_writel(ehci, tmp, &ehci->regs->port_status[0]);
+
+ return 0;
+}
+
+static int ehci_fsl_mpc512x_drv_resume(struct device *dev)
+{
+ struct usb_hcd *hcd = dev_get_drvdata(dev);
+ struct ehci_hcd *ehci = hcd_to_ehci(hcd);
+ struct fsl_usb2_platform_data *pdata = dev->platform_data;
+ u32 tmp;
+
+ dev_dbg(dev, "suspend=%d already_suspended=%d\n",
+ pdata->suspended, pdata->already_suspended);
+
+ /*
+ * If the controller was already suspended at suspend time,
+ * then don't resume it now.
+ */
+ if (pdata->already_suspended) {
+ dev_dbg(dev, "already suspended, leaving early\n");
+ pdata->already_suspended = 0;
+ return 0;
+ }
+
+ if (!pdata->suspended) {
+ dev_dbg(dev, "not suspended, leaving early\n");
+ return 0;
+ }
+
+ pdata->suspended = 0;
+
+ dev_dbg(dev, "resuming...\n");
+
+ /* set host mode */
+ tmp = USBMODE_CM_HOST | (pdata->es ? USBMODE_ES : 0);
+ ehci_writel(ehci, tmp, hcd->regs + FSL_SOC_USB_USBMODE);
+
+ ehci_writel(ehci, pdata->pm_usbgenctrl,
+ hcd->regs + FSL_SOC_USB_USBGENCTRL);
+ ehci_writel(ehci, ISIPHYCTRL_PXE | ISIPHYCTRL_PHYE,
+ hcd->regs + FSL_SOC_USB_ISIPHYCTRL);
+
+ /* restore EHCI registers */
+ ehci_writel(ehci, pdata->pm_command, &ehci->regs->command);
+ ehci_writel(ehci, pdata->pm_intr_enable, &ehci->regs->intr_enable);
+ ehci_writel(ehci, pdata->pm_frame_index, &ehci->regs->frame_index);
+ ehci_writel(ehci, pdata->pm_segment, &ehci->regs->segment);
+ ehci_writel(ehci, pdata->pm_frame_list, &ehci->regs->frame_list);
+ ehci_writel(ehci, pdata->pm_async_next, &ehci->regs->async_next);
+ ehci_writel(ehci, pdata->pm_configured_flag,
+ &ehci->regs->configured_flag);
+ ehci_writel(ehci, pdata->pm_portsc, &ehci->regs->port_status[0]);
+
+ set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
+ hcd->state = HC_STATE_RUNNING;
+ dev->power.power_state = PMSG_ON;
+
+ tmp = ehci_readl(ehci, &ehci->regs->command);
+ tmp |= CMD_RUN;
+ ehci_writel(ehci, tmp, &ehci->regs->command);
+
+ usb_hcd_resume_root_hub(hcd);
+
+ return 0;
+}
+#else
+static inline int ehci_fsl_mpc512x_drv_suspend(struct device *dev)
+{
+ return 0;
+}
+
+static inline int ehci_fsl_mpc512x_drv_resume(struct device *dev)
+{
+ return 0;
+}
+#endif /* CONFIG_PPC_MPC512x */
+
static struct ehci_fsl *hcd_to_ehci_fsl(struct usb_hcd *hcd)
{
struct ehci_hcd *ehci = hcd_to_ehci(hcd);
@@ -341,6 +484,11 @@
struct ehci_fsl *ehci_fsl = hcd_to_ehci_fsl(hcd);
void __iomem *non_ehci = hcd->regs;
+ if (of_device_is_compatible(dev->parent->of_node,
+ "fsl,mpc5121-usb2-dr")) {
+ return ehci_fsl_mpc512x_drv_suspend(dev);
+ }
+
ehci_prepare_ports_for_controller_suspend(hcd_to_ehci(hcd),
device_may_wakeup(dev));
if (!fsl_deep_sleep())
@@ -357,6 +505,11 @@
struct ehci_hcd *ehci = hcd_to_ehci(hcd);
void __iomem *non_ehci = hcd->regs;
+ if (of_device_is_compatible(dev->parent->of_node,
+ "fsl,mpc5121-usb2-dr")) {
+ return ehci_fsl_mpc512x_drv_resume(dev);
+ }
+
ehci_prepare_ports_for_controller_resume(ehci);
if (!fsl_deep_sleep())
return 0;
diff --git a/drivers/usb/host/ehci-fsl.h b/drivers/usb/host/ehci-fsl.h
index 3fabed3..4918062 100644
--- a/drivers/usb/host/ehci-fsl.h
+++ b/drivers/usb/host/ehci-fsl.h
@@ -27,6 +27,10 @@
#define PORT_PTS_SERIAL (3<<30)
#define PORT_PTS_PTW (1<<28)
#define FSL_SOC_USB_PORTSC2 0x188
+#define FSL_SOC_USB_USBMODE 0x1a8
+#define USBMODE_CM_MASK (3 << 0) /* controller mode mask */
+#define USBMODE_CM_HOST (3 << 0) /* controller mode: host */
+#define USBMODE_ES (1 << 2) /* (Big) Endian Select */
#define FSL_SOC_USB_USBGENCTRL 0x200
#define USBGENCTRL_PPP (1 << 3)
diff --git a/include/linux/fsl_devices.h b/include/linux/fsl_devices.h
index 4eb56ed..3773c5d 100644
--- a/include/linux/fsl_devices.h
+++ b/include/linux/fsl_devices.h
@@ -79,6 +79,21 @@
unsigned have_sysif_regs:1;
unsigned invert_drvvbus:1;
unsigned invert_pwr_fault:1;
+
+ unsigned suspended:1;
+ unsigned already_suspended:1;
+
+ /* register save area for suspend/resume */
+ u32 pm_command;
+ u32 pm_status;
+ u32 pm_intr_enable;
+ u32 pm_frame_index;
+ u32 pm_segment;
+ u32 pm_frame_list;
+ u32 pm_async_next;
+ u32 pm_configured_flag;
+ u32 pm_portsc;
+ u32 pm_usbgenctrl;
};
/* Flags in fsl_usb2_mph_platform_data */