From 10aebc772a10c95e30dff0779cb0f879b8f1554f Mon Sep 17 00:00:00 2001 From: Ben Dooks Date: Mon, 19 Jul 2010 09:40:44 +0100 Subject: USB: s3c-hsotg: Add initial detection and setup for dedicated FIFO mode Add support for the dedicated FIFO mode on newer SoCs such as the S5PV210 partly to improve support and to fix the bug where any non-EP0 IN endpoint requires its own FIFO allocation. To fix this, we ensure that any non-zero IN endpoint is given a TXFIFO using the same allocation method as the periodic case (all our current hardware has enough FIFOs and FIFO memory for a 1:1 mapping) and ensure that the necessary transmission done interrupt is enabled. The default settings from reset for the core point all EPs at FIFO0, used for the control endpoint. However, the controller documentation states that all IN endpoints _must_ have a unique FIFO to avoid any contention during transmission. Note, this leaves us with a large IN FIFO for EP0 (which re-uses the old NPTXFIFO) for an endpoint which cannot shift more than a pair of packets at a time... this is a waste, but it looks like we cannot re-allocate space to the individual IN FIFOs as they are already maxed out (to be confirmed). Signed-off-by: Ben Dooks Signed-off-by: Greg Kroah-Hartman --- arch/arm/plat-samsung/include/plat/regs-usb-hsotg.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'arch') diff --git a/arch/arm/plat-samsung/include/plat/regs-usb-hsotg.h b/arch/arm/plat-samsung/include/plat/regs-usb-hsotg.h index 8d18d9d4d148..dc90f5ede88f 100644 --- a/arch/arm/plat-samsung/include/plat/regs-usb-hsotg.h +++ b/arch/arm/plat-samsung/include/plat/regs-usb-hsotg.h @@ -226,6 +226,7 @@ #define S3C_DIEPMSK S3C_HSOTG_REG(0x810) +#define S3C_DIEPMSK_TxFIFOEmpty (1 << 7) #define S3C_DIEPMSK_INEPNakEffMsk (1 << 6) #define S3C_DIEPMSK_INTknEPMisMsk (1 << 5) #define S3C_DIEPMSK_INTknTXFEmpMsk (1 << 4) @@ -371,6 +372,7 @@ #define S3C_DIEPDMA(_a) S3C_HSOTG_REG(0x914 + ((_a) * 0x20)) #define S3C_DOEPDMA(_a) S3C_HSOTG_REG(0xB14 + ((_a) * 0x20)) +#define S3C_DTXFSTS(_a) S3C_HSOTG_REG(0x918 + ((_a) * 0x20)) #define S3C_EPFIFO(_a) S3C_HSOTG_REG(0x1000 + ((_a) * 0x1000)) -- cgit v1.2.3