diff options
| author | Hans de Goede | 2016-09-17 16:02:38 +0200 |
|---|---|---|
| committer | Hans de Goede | 2016-09-18 14:39:16 +0200 |
| commit | 7c22e26ec5badd564cfb674827ac11ac4e943e9f (patch) | |
| tree | c2156a04b6c690866e763e8003f8665a6fc30c49 /drivers/usb | |
| parent | 57075a472a5c2b9a7c498a9dc2f2cfcc1e898ec2 (diff) | |
sunxi: musb: Re-init musb controller on repeated probe calls
With sunxi-musb musb_lowlevel_init() can fail when a charger; or no cable
is plugged into the otg port.
To avoid leaking the struct musb allocated by musb_init_controller()
on repeated musb_usb_probe() calls, we were caching its result.
But musb_init_controller() does more, such as calling sunxi_musb_init()
which enables the clocks.
Not calling sunxi_musb_init() causes the musb controller to stop working
after a "usb reset" since that calls musb_usb_remove() which disables the
clocks.
This commit fixes this by removing the caching of the struct returned
from musb_init_controller(), it replaces this by free-ing the allocated
memory in musb_usb_remove() and calling musb_usb_remove() on
musb_usb_probe() errors to ensure proper cleanup.
While at it also make musb_usb_probe() and musb_usb_remove() static.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/musb-new/sunxi.c | 20 |
1 files changed, 11 insertions, 9 deletions
diff --git a/drivers/usb/musb-new/sunxi.c b/drivers/usb/musb-new/sunxi.c index dece7818dc3..469377fe4e6 100644 --- a/drivers/usb/musb-new/sunxi.c +++ b/drivers/usb/musb-new/sunxi.c @@ -201,7 +201,6 @@ static irqreturn_t sunxi_musb_interrupt(int irq, void *__hci) /* musb_core does not call enable / disable in a balanced manner <sigh> */ static bool enabled = false; -static struct musb *sunxi_musb; static int sunxi_musb_enable(struct musb *musb) { @@ -309,7 +308,9 @@ static struct musb_hdrc_platform_data musb_plat = { }; #ifdef CONFIG_USB_MUSB_HOST -int musb_usb_probe(struct udevice *dev) +static int musb_usb_remove(struct udevice *dev); + +static int musb_usb_probe(struct udevice *dev) { struct musb_host_data *host = dev_get_priv(dev); struct usb_bus_priv *priv = dev_get_uclass_priv(dev); @@ -317,23 +318,21 @@ int musb_usb_probe(struct udevice *dev) priv->desc_before_addr = true; - if (!sunxi_musb) { - sunxi_musb = musb_init_controller(&musb_plat, NULL, - (void *)SUNXI_USB0_BASE); - } - - host->host = sunxi_musb; + host->host = musb_init_controller(&musb_plat, NULL, + (void *)SUNXI_USB0_BASE); if (!host->host) return -EIO; ret = musb_lowlevel_init(host); if (ret == 0) printf("MUSB OTG\n"); + else + musb_usb_remove(dev); return ret; } -int musb_usb_remove(struct udevice *dev) +static int musb_usb_remove(struct udevice *dev) { struct musb_host_data *host = dev_get_priv(dev); struct sunxi_ccm_reg *ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE; @@ -346,6 +345,9 @@ int musb_usb_remove(struct udevice *dev) #endif clrbits_le32(&ccm->ahb_gate0, 1 << AHB_GATE_OFFSET_USB0); + free(host->host); + host->host = NULL; + return 0; } |