From: Ruchika Kharwar <ruchika@xxxxxx>
This patch adapts the dwc3 to use the device tree helper
"of_usb_get_dr_mode" for the mode of operation of the dwc3 instance
being probed.
[ balbi@xxxxxx : make of_usb_get_dr_mode() conditional on
dev->of_node and let pdata pass dr_mode too ]
Signed-off-by: Ruchika Kharwar <ruchika@xxxxxx>
Signed-off-by: Felipe Balbi <balbi@xxxxxx>
---
drivers/usb/dwc3/core.c | 73 +++++++++++++++++++++-------------------
drivers/usb/dwc3/core.h | 11 +++---
drivers/usb/dwc3/platform_data.h | 2 ++
3 files changed, 44 insertions(+), 42 deletions(-)
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index a4dab1c..dcb744c 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -37,6 +37,7 @@
#include <linux/usb/ch9.h>
#include <linux/usb/gadget.h>
#include <linux/usb/of.h>
+#include <linux/usb/otg.h>
#include "platform_data.h"
#include "core.h"
@@ -359,8 +360,6 @@ static int dwc3_probe(struct platform_device *pdev)
void __iomem *regs;
void *mem;
- u8 mode;
-
mem = devm_kzalloc(dev, sizeof(*dwc) + DWC3_ALIGN_MASK, GFP_KERNEL);
if (!mem) {
dev_err(dev, "not enough memory\n");
@@ -424,6 +423,7 @@ static int dwc3_probe(struct platform_device *pdev)
}
dwc->needs_fifo_resize = of_property_read_bool(node, "tx-fifo-resize");
+ dwc->dr_mode = of_usb_get_dr_mode(node);
} else {
dwc->maximum_speed = pdata->maximum_speed;
@@ -440,6 +440,7 @@ static int dwc3_probe(struct platform_device *pdev)
}
dwc->needs_fifo_resize = pdata->tx_fifo_resize;
+ dwc->dr_mode = pdata->dr_mode;
}
/* default to superspeed if no maximum_speed passed */
@@ -518,14 +519,17 @@ static int dwc3_probe(struct platform_device *pdev)
}
if (IS_ENABLED(CONFIG_USB_DWC3_HOST))
- mode = DWC3_MODE_HOST;
+ dwc->dr_mode = USB_DR_MODE_HOST;
else if (IS_ENABLED(CONFIG_USB_DWC3_GADGET))
- mode = DWC3_MODE_DEVICE;
+ dwc->dr_mode = USB_DR_MODE_PERIPHERAL;
else
- mode = DWC3_MODE_DRD;
+ dwc->dr_mode = of_usb_get_dr_mode(node);
+
+ if (dwc->dr_mode == USB_DR_MODE_UNKNOWN)
+ dwc->dr_mode = USB_DR_MODE_OTG;
- switch (mode) {
- case DWC3_MODE_DEVICE:
+ switch (dwc->dr_mode) {
+ case USB_DR_MODE_PERIPHERAL:
dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_DEVICE);
ret = dwc3_gadget_init(dwc);
if (ret) {
@@ -533,7 +537,7 @@ static int dwc3_probe(struct platform_device *pdev)
goto err2;
}
break;
- case DWC3_MODE_HOST:
+ case USB_DR_MODE_HOST:
dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_HOST);
ret = dwc3_host_init(dwc);
if (ret) {
@@ -541,7 +545,7 @@ static int dwc3_probe(struct platform_device *pdev)
goto err2;
}
break;
- case DWC3_MODE_DRD:
+ case USB_DR_MODE_OTG:
dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_OTG);
ret = dwc3_host_init(dwc);
if (ret) {
@@ -556,10 +560,9 @@ static int dwc3_probe(struct platform_device *pdev)
}
break;
default:
- dev_err(dev, "Unsupported mode of operation %d\n", mode);
+ dev_err(dev, "Unsupported mode of operation %d\n", dwc->dr_mode);
goto err2;
}
- dwc->mode = mode;
ret = dwc3_debugfs_init(dwc);
if (ret) {
@@ -572,14 +575,14 @@ static int dwc3_probe(struct platform_device *pdev)
return 0;
err3:
- switch (mode) {
- case DWC3_MODE_DEVICE:
+ switch (dwc->dr_mode) {
+ case USB_DR_MODE_PERIPHERAL:
dwc3_gadget_exit(dwc);
break;
- case DWC3_MODE_HOST:
+ case USB_DR_MODE_HOST:
dwc3_host_exit(dwc);
break;
- case DWC3_MODE_DRD:
+ case USB_DR_MODE_OTG:
dwc3_host_exit(dwc);
dwc3_gadget_exit(dwc);
break;
@@ -612,14 +615,14 @@ static int dwc3_remove(struct platform_device *pdev)
dwc3_debugfs_exit(dwc);
- switch (dwc->mode) {
- case DWC3_MODE_DEVICE:
+ switch (dwc->dr_mode) {
+ case USB_DR_MODE_PERIPHERAL:
dwc3_gadget_exit(dwc);
break;
- case DWC3_MODE_HOST:
+ case USB_DR_MODE_HOST:
dwc3_host_exit(dwc);
break;
- case DWC3_MODE_DRD:
+ case USB_DR_MODE_OTG:
dwc3_host_exit(dwc);
dwc3_gadget_exit(dwc);
break;
@@ -643,12 +646,12 @@ static int dwc3_prepare(struct device *dev)
spin_lock_irqsave(&dwc->lock, flags);
- switch (dwc->mode) {
- case DWC3_MODE_DEVICE:
- case DWC3_MODE_DRD:
+ switch (dwc->dr_mode) {
+ case USB_DR_MODE_PERIPHERAL:
+ case USB_DR_MODE_OTG:
dwc3_gadget_prepare(dwc);
/* FALLTHROUGH */
- case DWC3_MODE_HOST:
+ case USB_DR_MODE_HOST:
default:
dwc3_event_buffers_cleanup(dwc);
break;
@@ -666,12 +669,12 @@ static void dwc3_complete(struct device *dev)
spin_lock_irqsave(&dwc->lock, flags);
- switch (dwc->mode) {
- case DWC3_MODE_DEVICE:
- case DWC3_MODE_DRD:
+ switch (dwc->dr_mode) {
+ case USB_DR_MODE_PERIPHERAL:
+ case USB_DR_MODE_OTG:
dwc3_gadget_complete(dwc);
/* FALLTHROUGH */
- case DWC3_MODE_HOST:
+ case USB_DR_MODE_HOST:
default:
dwc3_event_buffers_setup(dwc);
break;
@@ -687,12 +690,12 @@ static int dwc3_suspend(struct device *dev)
spin_lock_irqsave(&dwc->lock, flags);
- switch (dwc->mode) {
- case DWC3_MODE_DEVICE:
- case DWC3_MODE_DRD:
+ switch (dwc->dr_mode) {
+ case USB_DR_MODE_PERIPHERAL:
+ case USB_DR_MODE_OTG:
dwc3_gadget_suspend(dwc);
/* FALLTHROUGH */
- case DWC3_MODE_HOST:
+ case USB_DR_MODE_HOST:
default:
/* do nothing */
break;
@@ -720,12 +723,12 @@ static int dwc3_resume(struct device *dev)
dwc3_writel(dwc->regs, DWC3_GCTL, dwc->gctl);
- switch (dwc->mode) {
- case DWC3_MODE_DEVICE:
- case DWC3_MODE_DRD:
+ switch (dwc->dr_mode) {
+ case USB_DR_MODE_PERIPHERAL:
+ case USB_DR_MODE_OTG:
dwc3_gadget_resume(dwc);
/* FALLTHROUGH */
- case DWC3_MODE_HOST:
+ case USB_DR_MODE_HOST:
default:
/* do nothing */
break;
diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
index b847728..92df952 100644
--- a/drivers/usb/dwc3/core.h
+++ b/drivers/usb/dwc3/core.h
@@ -29,6 +29,7 @@
#include <linux/usb/ch9.h>
#include <linux/usb/gadget.h>
+#include <linux/usb/otg.h>
/* Global constants */
#define DWC3_EP0_BOUNCE_SIZE 512
@@ -545,11 +546,6 @@ struct dwc3_hwparams {
/* HWPARAMS0 */
#define DWC3_MODE(n) ((n) & 0x7)
-#define DWC3_MODE_DEVICE 0
-#define DWC3_MODE_HOST 1
-#define DWC3_MODE_DRD 2
-#define DWC3_MODE_HUB 3
-
#define DWC3_MDWIDTH(n) (((n) & 0xff00) >> 8)
/* HWPARAMS1 */
@@ -611,7 +607,7 @@ struct dwc3_scratchpad_array {
* @u1u2: only used on revisions <1.83a for workaround
* @maximum_speed: maximum speed requested (mainly for testing purposes)
* @revision: revision register contents
- * @mode: mode of operation
+ * @dr_mode: requested mode of operation
* @usb2_phy: pointer to USB2 PHY
* @usb3_phy: pointer to USB3 PHY
* @dcfg: saved contents of DCFG register
@@ -669,6 +665,8 @@ struct dwc3 {
void __iomem *regs;
size_t regs_size;
+ enum usb_dr_mode dr_mode;
+
/* used for suspend/resume */
u32 dcfg;
u32 gctl;
@@ -677,7 +675,6 @@ struct dwc3 {
u32 u1u2;
u32 maximum_speed;
u32 revision;
- u32 mode;
#define DWC3_REVISION_173A 0x5533173a
#define DWC3_REVISION_175A 0x5533175a
diff --git a/drivers/usb/dwc3/platform_data.h b/drivers/usb/dwc3/platform_data.h
index 16ffe19..7db34f0 100644
--- a/drivers/usb/dwc3/platform_data.h
+++ b/drivers/usb/dwc3/platform_data.h
@@ -18,8 +18,10 @@
*/
#include <linux/usb/ch9.h>
+#include <linux/usb/otg.h>
struct dwc3_platform_data {
enum usb_device_speed maximum_speed;
+ enum usb_dr_mode dr_mode;
bool tx_fifo_resize;
};
--
1.8.2.1
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