From a5c18f1131506d23679b896660c73e30c51051cd Mon Sep 17 00:00:00 2001 From: Vahram Aharonyan Date: Mon, 14 Nov 2016 19:16:34 -0800 Subject: [PATCH] usb: dwc2: gadget: Enable descriptor DMA mode Add DCFG register field macro for descriptor DMA mode and update core initialization routine to set that bit accordingly. Signed-off-by: Vahram Aharonyan Signed-off-by: John Youn Signed-off-by: Felipe Balbi --- drivers/usb/dwc2/gadget.c | 10 ++++++++-- drivers/usb/dwc2/hw.h | 1 + 2 files changed, 9 insertions(+), 2 deletions(-) diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c index e5d095924fb4..e12b1f0b0b72 100644 --- a/drivers/usb/dwc2/gadget.c +++ b/drivers/usb/dwc2/gadget.c @@ -2888,15 +2888,21 @@ void dwc2_hsotg_core_init_disconnected(struct dwc2_hsotg *hsotg, dwc2_writel(intmsk, hsotg->regs + GINTMSK); - if (using_dma(hsotg)) + if (using_dma(hsotg)) { dwc2_writel(GAHBCFG_GLBL_INTR_EN | GAHBCFG_DMA_EN | (GAHBCFG_HBSTLEN_INCR4 << GAHBCFG_HBSTLEN_SHIFT), hsotg->regs + GAHBCFG); - else + + /* Set DDMA mode support in the core if needed */ + if (using_desc_dma(hsotg)) + __orr32(hsotg->regs + DCFG, DCFG_DESCDMA_EN); + + } else { dwc2_writel(((hsotg->dedicated_fifos) ? (GAHBCFG_NP_TXF_EMP_LVL | GAHBCFG_P_TXF_EMP_LVL) : 0) | GAHBCFG_GLBL_INTR_EN, hsotg->regs + GAHBCFG); + } /* * If INTknTXFEmpMsk is enabled, it's important to disable ep interrupts diff --git a/drivers/usb/dwc2/hw.h b/drivers/usb/dwc2/hw.h index 0e5bfb38b2df..631396ba733f 100644 --- a/drivers/usb/dwc2/hw.h +++ b/drivers/usb/dwc2/hw.h @@ -412,6 +412,7 @@ /* Device mode registers */ #define DCFG HSOTG_REG(0x800) +#define DCFG_DESCDMA_EN (1 << 23) #define DCFG_EPMISCNT_MASK (0x1f << 18) #define DCFG_EPMISCNT_SHIFT 18 #define DCFG_EPMISCNT_LIMIT 0x1f -- 2.20.1