int dwc3_intel_byt_resume(struct dwc_otg2 *otg)
{
struct pci_dev *pci_dev;
if (!otg)
return 0;
pci_dev = to_pci_dev(otg->dev);
/* From synopsys spec 12.2.11.
* Software cannot access memory-mapped I/O space
* for 10ms.
*/
mdelay(10);
pci_restore_state(pci_dev);
if (pci_enable_device(pci_dev) < 0) {
otg_err(otg, "pci_enable_device failed.\n");
return -EIO;
}
set_sus_phy(otg, 0);
return 0;
}
int dwc3_intel_platform_init(struct dwc_otg2 *otg)
{
int retval;
struct intel_dwc_otg_pdata *data;
data = (struct intel_dwc_otg_pdata *)otg->otg_data;
/* Init a_bus_drop callback */
otg->usb2_phy.a_bus_drop = dwc_a_bus_drop;
otg->usb2_phy.vbus_state = VBUS_ENABLED;
/* Get usb2 phy type */
otg->usb2_phy.intf = data->usb2_phy_type;
/* Turn off VUSBPHY if it haven't used by USB2 PHY.
* Otherwise, it will consume ~2.6mA(on VSYS) on MOFD.
*/
if (!data->using_vusbphy) {
retval = control_usb_phy_power(PMIC_VLDOCNT, false);
if (retval)
otg_err(otg, "Fail to turn off VUSBPHY\n");
} else if (!is_utmi_phy(otg)) {
/* If the current USB2 PHY low power controlled by VUSBPHY. Then
* we need to de-assert USBRST pin to make USB2 PHY always stay
* in active state.
*/
retval = control_usb_phy_power(PMIC_USBPHYCTRL, true);
if (retval)
otg_err(otg, "Fail to de-assert USBRST#\n");
} else {
/* If we are using utmi phy, and through VUSBPHY to do power
* control. Then we need to assert USBRST# for external ULPI phy
* to ask it under inactive state saving power.
*/
retval = control_usb_phy_power(PMIC_USBPHYCTRL, false);
if (retval)
otg_err(otg, "Fail to de-assert USBRST#\n");
}
/* Don't let phy go to suspend mode, which
* will cause FS/LS devices enum failed in host mode.
*/
set_sus_phy(otg, 0);
retval = device_create_file(otg->dev, &dev_attr_otg_id);
if (retval < 0) {
otg_dbg(otg,
"Can't register sysfs attribute: %d\n", retval);
return -ENOMEM;
}
otg_dbg(otg, "\n");
otg_write(otg, OEVTEN, 0);
otg_write(otg, OCTL, 0);
dwc3_switch_mode(otg, GCTL_PRT_CAP_DIR_OTG);
return 0;
}
int dwc3_intel_byt_suspend(struct dwc_otg2 *otg)
{
struct pci_dev *pci_dev;
pci_power_t state = PCI_D3hot;
if (!otg)
return 0;
pci_dev = to_pci_dev(otg->dev);
set_sus_phy(otg, 1);
if (pci_save_state(pci_dev)) {
otg_err(otg, "pci_save_state failed!\n");
return -EIO;
}
pci_disable_device(pci_dev);
pci_set_power_state(pci_dev, state);
return 0;
}
int dwc3_intel_byt_platform_init(struct dwc_otg2 *otg)
{
struct intel_dwc_otg_pdata *data;
u32 gctl;
int id_value;
int retval;
data = (struct intel_dwc_otg_pdata *)otg->otg_data;
if (data)
INIT_DELAYED_WORK(&data->suspend_discon_work,
dwc_otg_suspend_discon_work);
if (data && data->gpio_cs && data->gpio_reset) {
retval = gpio_request(data->gpio_cs, "phy_cs");
if (retval < 0) {
otg_err(otg, "failed to request CS pin %d\n",
data->gpio_cs);
return retval;
}
retval = gpio_request(data->gpio_reset, "phy_reset");
if (retval < 0) {
otg_err(otg, "failed to request RESET pin %d\n",
data->gpio_reset);
return retval;
}
}
if (data && data->gpio_id) {
dev_info(otg->dev, "USB ID detection - Enabled - GPIO\n");
/* Set ID default value to 1 Floating */
data->id = 1;
retval = gpio_request(data->gpio_id, "gpio_id");
if (retval < 0) {
otg_err(otg, "failed to request ID pin %d\n",
data->gpio_id);
return retval;
}
retval = gpio_direction_input(data->gpio_id);
if (retval < 0) {
otg_err(otg, "failed to request ID pin %d\n",
data->gpio_id);
return retval;
}
retval = request_threaded_irq(gpio_to_irq(data->gpio_id),
NULL, dwc3_gpio_id_irq,
IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING |
IRQF_ONESHOT, "dwc-gpio-id", otg->dev);
if (retval < 0) {
otg_err(otg, "failed to request interrupt gpio ID\n");
return retval;
}
otg_dbg(otg, "GPIO ID request/Interrupt reuqest Done\n");
id_value = dwc3_check_gpio_id(otg);
if ((id_value == 0 || id_value == 1) &&
(data->id != id_value)) {
data->id = id_value;
dev_info(otg->dev, "ID notification (id = %d)\n",
data->id);
atomic_notifier_call_chain(&otg->usb2_phy.notifier,
USB_EVENT_ID, &id_value);
} else
otg_dbg(otg, "Get incorrect ID value %d\n", id_value);
}
/* Don't let phy go to suspend mode, which
* will cause FS/LS devices enum failed in host mode.
*/
set_sus_phy(otg, 0);
retval = device_create_file(otg->dev, &dev_attr_otg_id);
if (retval < 0) {
otg_dbg(otg,
"Can't register sysfs attribute: %d\n", retval);
return -ENOMEM;
}
retval = device_create_file(otg->dev, &dev_attr_vbus_evt);
if (retval < 0) {
otg_dbg(otg,
"Can't register sysfs attribute: %d\n", retval);
return -ENOMEM;
}
otg_dbg(otg, "\n");
otg_write(otg, OEVTEN, 0);
otg_write(otg, OCTL, 0);
gctl = otg_read(otg, GCTL);
gctl |= GCTL_PRT_CAP_DIR_OTG << GCTL_PRT_CAP_DIR_SHIFT;
otg_write(otg, GCTL, gctl);
return 0;
}
int dwc3_intel_resume(struct dwc_otg2 *otg)
{
struct pci_dev *pci_dev;
struct usb_hcd *hcd = NULL;
u32 data;
int ret;
if (!otg)
return 0;
hcd = container_of(otg->otg.host, struct usb_hcd, self);
/* After resume from D0i3cold. The UTMI PHY D+ drive issue
* reproduced due to all setting be reseted. So switch to OTG
* mode avoid D+ drive too early.
*/
if ((otg->state == DWC_STATE_B_IDLE ||
otg->state == DWC_STATE_CHARGING ||
otg->state == DWC_STATE_WAIT_VBUS_FALL ||
otg->state == DWC_STATE_WAIT_VBUS_RAISE) &&
is_utmi_phy(otg)) {
/* Reconnect DP/DM between Pmic and SOC for support host
* and device mode. */
ret = intel_scu_ipc_update_register(PMIC_USBPHYCTRL,
USBPHYRSTB, USBPHYRSTB);
if (ret)
otg_err(otg, "%s: ipc update failed\n", __func__);
otg_write(otg, OEVTEN, 0);
otg_write(otg, OCTL, 0);
dwc3_switch_mode(otg, GCTL_PRT_CAP_DIR_OTG);
}
/* This is one SCU WA. SCU should set GUSB2PHYCFG0
* bit 4 for ULPI setting. But SCU haven't do that.
* So do WA first until SCU fix.
*/
data = otg_read(otg, GUSB2PHYCFG0);
if (is_utmi_phy(otg))
data &= ~(1 << 4);
else
data |= (1 << 4);
otg_write(otg, GUSB2PHYCFG0, data);
pci_dev = to_pci_dev(otg->dev);
/* From synopsys spec 12.2.11.
* Software cannot access memory-mapped I/O space
* for 10ms. Delay 5 ms here should be enough. Too
* long a delay causes hibernation exit failure.
*/
mdelay(5);
pci_restore_state(pci_dev);
if (pci_enable_device(pci_dev) < 0) {
otg_err(otg, "pci_enable_device failed.\n");
return -EIO;
}
set_sus_phy(otg, 0);
/* Delay 1ms waiting PHY clock debounce.
* Without this debounce, will met fabric error randomly.
**/
mdelay(1);
if (otg->state == DWC_STATE_A_HOST &&
otg->resume_host)
otg->resume_host(hcd);
return 0;
}
int dwc3_intel_suspend(struct dwc_otg2 *otg)
{
int ret;
struct usb_phy *phy;
struct pci_dev *pci_dev;
struct usb_hcd *hcd = NULL;
pci_power_t state = PCI_D3cold;
if (!otg)
return 0;
hcd = container_of(otg->otg.host, struct usb_hcd, self);
pci_dev = to_pci_dev(otg->dev);
if (otg->state == DWC_STATE_A_HOST &&
otg->suspend_host) {
/* Check if USB2 ULPI PHY is hang via access its internal
* registers. If hang, then do hard reset before enter
* hibernation mode. Otherwise, the USB2 PHY can't enter
* suspended state which will blocking U2PMU can't get ready
* then can't enter D0i3hot forever in SCU FW.
*/
if (!is_utmi_phy(otg)) {
phy = usb_get_phy(USB_PHY_TYPE_USB2);
if (!phy)
return -ENODEV;
if (usb_phy_io_read(phy, ULPI_VENDOR_ID_LOW) < 0) {
enable_usb_phy(otg, 0);
enable_usb_phy(otg, 1);
}
usb_put_phy(phy);
}
ret = otg->suspend_host(hcd);
if (ret) {
otg_err(otg, "dwc3-host enter suspend faield: %d\n", ret);
return ret;
}
}
if (otg->state == DWC_STATE_B_PERIPHERAL ||
otg->state == DWC_STATE_A_HOST)
state = PCI_D3hot;
set_sus_phy(otg, 1);
if (pci_save_state(pci_dev)) {
otg_err(otg, "pci_save_state failed!\n");
return -EIO;
}
pci_disable_device(pci_dev);
if ((state == PCI_D3cold) && is_utmi_phy(otg)) {
/* Important!! Whenever the VUSBPHY rail is disabled, SW
* must assert USBRST# to isolate the SOC’s DP/DM pins from the
* outside world. There is a risk of damage to the SOC if a
* peripheral were to bias DP/DM to 3.3V when the SOC is
* unpowered. */
ret = intel_scu_ipc_update_register(PMIC_USBPHYCTRL,
0x0, USBPHYRSTB);
if (ret)
otg_err(otg, "%s: ipc update failed\n", __func__);
}
pci_set_power_state(pci_dev, state);
return 0;
}