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usb: chipidea: introduce dual role mode pdata flags 

Even if a chipidea core is otg capable the board may not be. 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: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Sascha Hauer 2013-06-13 17:59:57 +03:00 committed by Greg Kroah-Hartman
parent 40dcd0e806
commit 691962d159
3 changed files with 21 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
Documentation/devicetree/bindings/usb/ci13xxx-imx.txt
View File

@ -9,6 +9,7 @@ Recommended properies:
- phy_type: the type of the phy connected to the core. Should be one
of "utmi", "utmi_wide", "ulpi", "serial" or "hsic". Without this
property the PORTSC register won't be touched
- dr_mode: One of "host", "peripheral" or "otg". Defaults to "otg"
Optional properties:
- fsl,usbphy: phandler of usb phy that connects to the only one port

26
drivers/usb/chipidea/core.c
View File

@ -405,6 +405,7 @@ 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");
@ -456,14 +457,25 @@ static int ci_hdrc_probe(struct platform_device *pdev)
if (!ci->platdata->phy_mode)
ci->platdata->phy_mode = of_usb_get_phy_mode(dev->of_node);
/* 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 (!ci->platdata->dr_mode)
ci->platdata->dr_mode = of_usb_get_dr_mode(dev->of_node);
ret = ci_hdrc_gadget_init(ci);
if (ret)
dev_info(dev, "doesn't support gadget\n");
if (ci->platdata->dr_mode == USB_DR_MODE_UNKNOWN)
ci->platdata->dr_mode = USB_DR_MODE_OTG;
dr_mode = ci->platdata->dr_mode;
/* initialize role(s) before the interrupt is requested */
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");
}
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");

2
include/linux/usb/chipidea.h
View File

@ -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);