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musb: sunxi: Add support for platform_set_mode 

This allows run-time dr_mode switching support via the "mode" musb
sysfs attribute.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Hans de Goede 2016-09-12 21:48:32 -05:00 committed by Greg Kroah-Hartman
parent 65b3f50ed6
commit 7cba17ec9a
1 changed files with 57 additions and 4 deletions
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61
drivers/usb/musb/sunxi.c
View File

@ -74,6 +74,7 @@
#define SUNXI_MUSB_FL_HAS_SRAM 5
#define SUNXI_MUSB_FL_HAS_RESET 6
#define SUNXI_MUSB_FL_NO_CONFIGDATA 7
#define SUNXI_MUSB_FL_PHY_MODE_PEND 8
/* Our read/write methods need access and do not get passed in a musb ref :| */
static struct musb *sunxi_musb;
@ -87,6 +88,7 @@ struct sunxi_glue {
struct phy *phy;
struct platform_device *usb_phy;
struct usb_phy *xceiv;
enum phy_mode phy_mode;
unsigned long flags;
struct work_struct work;
struct extcon_dev *extcon;
@ -140,6 +142,9 @@ static void sunxi_musb_work(struct work_struct *work)
clear_bit(SUNXI_MUSB_FL_PHY_ON, &glue->flags);
}
}
if (test_and_clear_bit(SUNXI_MUSB_FL_PHY_MODE_PEND, &glue->flags))
phy_set_mode(glue->phy, glue->phy_mode);
}
static void sunxi_musb_set_vbus(struct musb *musb, int is_on)
@ -341,6 +346,50 @@ static void sunxi_musb_dma_controller_destroy(struct dma_controller *c)
{
}
static int sunxi_musb_set_mode(struct musb *musb, u8 mode)
{
struct sunxi_glue *glue = dev_get_drvdata(musb->controller->parent);
enum phy_mode new_mode;
switch (mode) {
case MUSB_HOST:
new_mode = PHY_MODE_USB_HOST;
break;
case MUSB_PERIPHERAL:
new_mode = PHY_MODE_USB_DEVICE;
break;
case MUSB_OTG:
new_mode = PHY_MODE_USB_OTG;
break;
default:
dev_err(musb->controller->parent,
"Error requested mode not supported by this kernel\n");
return -EINVAL;
}
if (glue->phy_mode == new_mode)
return 0;
if (musb->port_mode != MUSB_PORT_MODE_DUAL_ROLE) {
dev_err(musb->controller->parent,
"Error changing modes is only supported in dual role mode\n");
return -EINVAL;
}
if (musb->port1_status & USB_PORT_STAT_ENABLE)
musb_root_disconnect(musb);
/*
* phy_set_mode may sleep, and we're called with a spinlock held,
* so let sunxi_musb_work deal with it.
*/
glue->phy_mode = new_mode;
set_bit(SUNXI_MUSB_FL_PHY_MODE_PEND, &glue->flags);
schedule_work(&glue->work);
return 0;
}
/*
* sunxi musb register layout
* 0x00 - 0x17 fifo regs, 1 long per fifo
@ -568,6 +617,7 @@ static const struct musb_platform_ops sunxi_musb_ops = {
.writew = sunxi_musb_writew,
.dma_init = sunxi_musb_dma_controller_create,
.dma_exit = sunxi_musb_dma_controller_destroy,
.set_mode = sunxi_musb_set_mode,
.set_vbus = sunxi_musb_set_vbus,
.pre_root_reset_end = sunxi_musb_pre_root_reset_end,
.post_root_reset_end = sunxi_musb_post_root_reset_end,
@ -614,21 +664,28 @@ static int sunxi_musb_probe(struct platform_device *pdev)
return -EINVAL;
}
glue = devm_kzalloc(&pdev->dev, sizeof(*glue), GFP_KERNEL);
if (!glue)
return -ENOMEM;
memset(&pdata, 0, sizeof(pdata));
switch (usb_get_dr_mode(&pdev->dev)) {
#if defined CONFIG_USB_MUSB_DUAL_ROLE || defined CONFIG_USB_MUSB_HOST
case USB_DR_MODE_HOST:
pdata.mode = MUSB_PORT_MODE_HOST;
glue->phy_mode = PHY_MODE_USB_HOST;
break;
#endif
#if defined CONFIG_USB_MUSB_DUAL_ROLE || defined CONFIG_USB_MUSB_GADGET
case USB_DR_MODE_PERIPHERAL:
pdata.mode = MUSB_PORT_MODE_GADGET;
glue->phy_mode = PHY_MODE_USB_DEVICE;
break;
#endif
#ifdef CONFIG_USB_MUSB_DUAL_ROLE
case USB_DR_MODE_OTG:
pdata.mode = MUSB_PORT_MODE_DUAL_ROLE;
glue->phy_mode = PHY_MODE_USB_OTG;
break;
#endif
default:
@ -638,10 +695,6 @@ static int sunxi_musb_probe(struct platform_device *pdev)
pdata.platform_ops = &sunxi_musb_ops;
pdata.config = &sunxi_musb_hdrc_config;
glue = devm_kzalloc(&pdev->dev, sizeof(*glue), GFP_KERNEL);
if (!glue)
return -ENOMEM;
glue->dev = &pdev->dev;
INIT_WORK(&glue->work, sunxi_musb_work);
glue->host_nb.notifier_call = sunxi_musb_host_notifier;