[U-Boot] [PATCH 2/3] usb: dwc2_udc_otg: add bcm2835 SoC (Raspberry Pi4) support

[Lukasz Majewski]

Hi Marek,

> Broadcom 2835 SoC requires special conversion of physical memory
> addresses for DMA purpose, so add needed wrappers to dwc2_udc_otg
> driver. Also extend the list of compatible devices with
> 'brcm,bcm2835-usb' entry. This allows to use USB gadget drivers (i.e.
> DFU) on Raspberry Pi4 boards.
> 
> Signed-off-by: Marek Szyprowski <m.szyprowski at samsung.com>
> ---
>  drivers/usb/gadget/dwc2_udc_otg.c          |  2 ++
>  drivers/usb/gadget/dwc2_udc_otg_xfer_dma.c | 12 ++++++------
>  2 files changed, 8 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/usb/gadget/dwc2_udc_otg.c
> b/drivers/usb/gadget/dwc2_udc_otg.c index 35f4147840e..49f342eb211
> 100644 --- a/drivers/usb/gadget/dwc2_udc_otg.c
> +++ b/drivers/usb/gadget/dwc2_udc_otg.c
> @@ -31,6 +31,7 @@
>  #include <linux/usb/otg.h>
>  #include <linux/usb/gadget.h>
>  
> +#include <phys2bus.h>
>  #include <asm/byteorder.h>
>  #include <asm/unaligned.h>
>  #include <asm/io.h>
> @@ -1213,6 +1214,7 @@ static int dwc2_udc_otg_remove(struct udevice
> *dev) 
>  static const struct udevice_id dwc2_udc_otg_ids[] = {
>  	{ .compatible = "snps,dwc2" },
> +	{ .compatible = "brcm,bcm2835-usb" },
>  	{ .compatible = "st,stm32mp1-hsotg",
>  	  .data = (ulong)dwc2_set_stm32mp1_hsotg_params },
>  	{},
> diff --git a/drivers/usb/gadget/dwc2_udc_otg_xfer_dma.c
> b/drivers/usb/gadget/dwc2_udc_otg_xfer_dma.c index
> 7eb632d3b14..5e695b4ff2a 100644 ---
> a/drivers/usb/gadget/dwc2_udc_otg_xfer_dma.c +++
> b/drivers/usb/gadget/dwc2_udc_otg_xfer_dma.c @@ -28,7 +28,7 @@ static
> inline void dwc2_udc_ep0_zlp(struct dwc2_udc *dev) {
>  	u32 ep_ctrl;
>  
> -	writel(usb_ctrl_dma_addr, &reg->in_endp[EP0_CON].diepdma);
> +	writel(phys_to_bus((unsigned long)usb_ctrl_dma_addr),
> &reg->in_endp[EP0_CON].diepdma); writel(DIEPT_SIZ_PKT_CNT(1),
> &reg->in_endp[EP0_CON].dieptsiz); 
>  	ep_ctrl = readl(&reg->in_endp[EP0_CON].diepctl);
> @@ -49,7 +49,7 @@ static void dwc2_udc_pre_setup(void)
>  
>  	writel(DOEPT_SIZ_PKT_CNT(1) | sizeof(struct usb_ctrlrequest),
>  	       &reg->out_endp[EP0_CON].doeptsiz);
> -	writel(usb_ctrl_dma_addr, &reg->out_endp[EP0_CON].doepdma);
> +	writel(phys_to_bus((unsigned long)usb_ctrl_dma_addr),
> &reg->out_endp[EP0_CON].doepdma); 
>  	ep_ctrl = readl(&reg->out_endp[EP0_CON].doepctl);
>  	writel(ep_ctrl|DEPCTL_EPENA,
> &reg->out_endp[EP0_CON].doepctl); @@ -75,7 +75,7 @@ static inline
> void dwc2_ep0_complete_out(void) 
>  	writel(DOEPT_SIZ_PKT_CNT(1) | sizeof(struct usb_ctrlrequest),
>  	       &reg->out_endp[EP0_CON].doeptsiz);
> -	writel(usb_ctrl_dma_addr, &reg->out_endp[EP0_CON].doepdma);
> +	writel(phys_to_bus((unsigned long)usb_ctrl_dma_addr),
> &reg->out_endp[EP0_CON].doepdma); 
>  	ep_ctrl = readl(&reg->out_endp[EP0_CON].doepctl);
>  	writel(ep_ctrl|DEPCTL_EPENA|DEPCTL_CNAK,
> @@ -113,7 +113,7 @@ static int setdma_rx(struct dwc2_ep *ep, struct
> dwc2_request *req) (unsigned long) ep->dma_buf +
>  				ROUND(ep->len,
> CONFIG_SYS_CACHELINE_SIZE)); 
> -	writel((unsigned long) ep->dma_buf,
> &reg->out_endp[ep_num].doepdma);
> +	writel(phys_to_bus((unsigned long)ep->dma_buf),
> &reg->out_endp[ep_num].doepdma); writel(DOEPT_SIZ_PKT_CNT(pktcnt) |
> DOEPT_SIZ_XFER_SIZE(length), &reg->out_endp[ep_num].doeptsiz);
>  	writel(DEPCTL_EPENA|DEPCTL_CNAK|ctrl,
> &reg->out_endp[ep_num].doepctl); @@ -161,7 +161,7 @@ static int
> setdma_tx(struct dwc2_ep *ep, struct dwc2_request *req) while
> (readl(&reg->grstctl) & TX_FIFO_FLUSH) ;
>  
> -	writel((unsigned long) ep->dma_buf,
> &reg->in_endp[ep_num].diepdma);
> +	writel(phys_to_bus((unsigned long)ep->dma_buf),
> &reg->in_endp[ep_num].diepdma); writel(DIEPT_SIZ_PKT_CNT(pktcnt) |
> DIEPT_SIZ_XFER_SIZE(length), &reg->in_endp[ep_num].dieptsiz);
>  
> @@ -921,7 +921,7 @@ static int dwc2_udc_get_status(struct dwc2_udc
> *dev, (unsigned long) usb_ctrl +
>  			   ROUND(sizeof(g_status),
> CONFIG_SYS_CACHELINE_SIZE)); 
> -	writel(usb_ctrl_dma_addr, &reg->in_endp[EP0_CON].diepdma);
> +	writel(phys_to_bus(usb_ctrl_dma_addr),
> &reg->in_endp[EP0_CON].diepdma); writel(DIEPT_SIZ_PKT_CNT(1) |
> DIEPT_SIZ_XFER_SIZE(2), &reg->in_endp[EP0_CON].dieptsiz);
>  

Reviewed-by: Lukasz Majewski <lukma at denx.de>


Best regards,

Lukasz Majewski

--

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