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| author | Kuo-Jung Su <dantesu@faraday-tech.com> | 2013-12-20 12:32:59 +0800 |
|---|---|---|
| committer | Marek Vasut <marex@denx.de> | 2014-01-13 12:15:12 +0100 |
| commit | bd5e301d35621f2b00e0ecd77464c6c0e967fdbb (patch) | |
| tree | f99f8029a9ea646ebd387377902dc4a4339c5a5e | |
| parent | 7f673c99c2d8d1aa21996c5b914f06d784b080ca (diff) | |
| download | u-boot-imx-bd5e301d35621f2b00e0ecd77464c6c0e967fdbb.zip u-boot-imx-bd5e301d35621f2b00e0ecd77464c6c0e967fdbb.tar.gz u-boot-imx-bd5e301d35621f2b00e0ecd77464c6c0e967fdbb.tar.bz2 | |
usb: gadget: fotg210: add w1c interrupt status support
Since hardware revision 1.11.0, the following interrupt status
registers are now W1C (i.e., write 1 clear):
1. Interrupt Source Group 0 Register (0x144) (EP0 Abort: BIT5)
2. Interrupt Source Group 2 Register (0x14C) (All bits)
And before revision 1.11.0, these registers are all R/W.
Which means software must write a 0 to clear the status.
Signed-off-by: Kuo-Jung Su <dantesu@faraday-tech.com>
CC: Marek Vasut <marex@denx.de>
| -rw-r--r-- | drivers/usb/gadget/fotg210.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/usb/gadget/fotg210.c b/drivers/usb/gadget/fotg210.c index 6e19db1..cc5c507 100644 --- a/drivers/usb/gadget/fotg210.c +++ b/drivers/usb/gadget/fotg210.c @@ -847,6 +847,13 @@ int usb_gadget_handle_interrupts(void) /* CX interrupts */ if (gisr & GISR_GRP0) { st = readl(®s->gisr0); + /* + * Write 1 and then 0 works for both W1C & RW. + * + * HW v1.11.0+: It's a W1C register (write 1 clear) + * HW v1.10.0-: It's a R/W register (write 0 clear) + */ + writel(st & GISR0_CXABORT, ®s->gisr0); writel(0, ®s->gisr0); if (st & GISR0_CXERR) @@ -873,6 +880,13 @@ int usb_gadget_handle_interrupts(void) /* Device Status Interrupts */ if (gisr & GISR_GRP2) { st = readl(®s->gisr2); + /* + * Write 1 and then 0 works for both W1C & RW. + * + * HW v1.11.0+: It's a W1C register (write 1 clear) + * HW v1.10.0-: It's a R/W register (write 0 clear) + */ + writel(st, ®s->gisr2); writel(0, ®s->gisr2); if (st & GISR2_RESET) |