[PATCH 6/9] USB chipidea: introduce dual role mode pdata flags
From: mkl@pengutronix.de (Marc Kleine-Budde)
Date: 2013-02-27 12:27:12
Subsystem:
chipidea usb high speed dual role controller, the rest, usb subsystem · Maintainers:
Peter Chen, Linus Torvalds, Greg Kroah-Hartman
From: Sascha Hauer <s.hauer@pengutronix.de> Even if a chipidea core is otg capable the board may not. This allows to explicitly set the core to host/peripheral mode. Without these flags the driver falls back to the old behaviour. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de> --- drivers/usb/chipidea/core.c | 22 ++++++++++++++++------ include/linux/usb/chipidea.h | 2 +- 2 files changed, 17 insertions(+), 7 deletions(-)
diff --git a/drivers/usb/chipidea/core.c b/drivers/usb/chipidea/core.c
index 04d68cb..ec27060 100644
--- a/drivers/usb/chipidea/core.c
+++ b/drivers/usb/chipidea/core.c@@ -435,6 +435,7 @@ static int ci_hdrc_probe(struct platform_device *pdev) struct resource *res; void __iomem *base; int ret; + enum usb_dr_mode dr_mode; if (!dev->platform_data) { dev_err(dev, "platform data missing\n");
@@ -487,14 +488,23 @@ static int ci_hdrc_probe(struct platform_device *pdev) return -ENODEV; } + /* For now we treat dual-role as otg */ + dr_mode = ci->platdata->dr_mode; + if (dr_mode == USB_DR_MODE_UNKNOWN || dr_mode == USB_DR_MODE_DUAL_ROLE) + dr_mode = USB_DR_MODE_OTG; + /* initialize role(s) before the interrupt is requested */ - ret = ci_hdrc_host_init(ci); - if (ret) - dev_info(dev, "doesn't support host\n"); + if (dr_mode == USB_DR_MODE_OTG || dr_mode == USB_DR_MODE_HOST) { + ret = ci_hdrc_host_init(ci); + if (ret) + dev_info(dev, "doesn't support host\n"); + } - ret = ci_hdrc_gadget_init(ci); - if (ret) - dev_info(dev, "doesn't support gadget\n"); + if (dr_mode == USB_DR_MODE_OTG || dr_mode == USB_DR_MODE_PERIPHERAL) { + ret = ci_hdrc_gadget_init(ci); + if (ret) + dev_info(dev, "doesn't support gadget\n"); + } if (!ci->roles[CI_ROLE_HOST] && !ci->roles[CI_ROLE_GADGET]) { dev_err(dev, "no supported roles\n");
diff --git a/include/linux/usb/chipidea.h b/include/linux/usb/chipidea.h
index 1a2aa18..b314647 100644
--- a/include/linux/usb/chipidea.h
+++ b/include/linux/usb/chipidea.h@@ -20,7 +20,7 @@ struct ci13xxx_platform_data { #define CI13XXX_REQUIRE_TRANSCEIVER BIT(1) #define CI13XXX_PULLUP_ON_VBUS BIT(2) #define CI13XXX_DISABLE_STREAMING BIT(3) - + enum usb_dr_mode dr_mode; #define CI13XXX_CONTROLLER_RESET_EVENT 0 #define CI13XXX_CONTROLLER_STOPPED_EVENT 1 void (*notify_event) (struct ci13xxx *ci, unsigned event);
--
1.7.10.4