commit 2a7a7d92d87c74f1df5b03caa9e87034116b1c2a
author Marek Szyprowski <m.szyprowski@samsung.com> Mon Dec 02 12:11:17 2019 +0100
committer Matthias Brugger <mbrugger@suse.com> Wed Jan 29 18:30:33 2020 +0100
tree 049ef3a9d3ab03037690714bf533a8c220cb6f41
parent 253d3b699df2ba4400fb1b28514da7df06b724c0

usb: dwc2_udc_otg: add bcm2835 SoC (Raspberry Pi4) support

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@samsung.com>
Reviewed-by: Lukasz Majewski <lukma@denx.de>
Signed-off-by: Matthias Brugger <mbrugger@suse.com>

drivers/usb/gadget/dwc2_udc_otg.c

diff --git a/drivers/usb/gadget/dwc2_udc_otg.c b/drivers/usb/gadget/dwc2_udc_otg.c
index 35f4147..49f342e 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 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 },
 	{},

drivers/usb/gadget/dwc2_udc_otg_xfer_dma.c

diff --git a/drivers/usb/gadget/dwc2_udc_otg_xfer_dma.c b/drivers/usb/gadget/dwc2_udc_otg_xfer_dma.c
index b68c2b2..d4fbb75 100644
--- a/drivers/usb/gadget/dwc2_udc_otg_xfer_dma.c
+++ b/drivers/usb/gadget/dwc2_udc_otg_xfer_dma.c
@@ -31,7 +31,7 @@
 {
 	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);
@@ -52,7 +52,7 @@
 
 	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);
@@ -78,7 +78,7 @@
 
 	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,
@@ -116,7 +116,7 @@
 				(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);
@@ -164,7 +164,7 @@
 	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);
 
@@ -924,7 +924,7 @@
 			   (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);