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path: root/drivers/usb/dwc3/core.c
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Diffstat (limited to 'drivers/usb/dwc3/core.c')
-rw-r--r--drivers/usb/dwc3/core.c209
1 files changed, 174 insertions, 35 deletions
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index 600d82348511..7c9df630dbe4 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -59,6 +59,60 @@
#include "debug.h"
+static char *maximum_speed = "super";
+module_param(maximum_speed, charp, 0);
+MODULE_PARM_DESC(maximum_speed, "Maximum supported speed.");
+
+/* -------------------------------------------------------------------------- */
+
+#define DWC3_DEVS_POSSIBLE 32
+
+static DECLARE_BITMAP(dwc3_devs, DWC3_DEVS_POSSIBLE);
+
+int dwc3_get_device_id(void)
+{
+ int id;
+
+again:
+ id = find_first_zero_bit(dwc3_devs, DWC3_DEVS_POSSIBLE);
+ if (id < DWC3_DEVS_POSSIBLE) {
+ int old;
+
+ old = test_and_set_bit(id, dwc3_devs);
+ if (old)
+ goto again;
+ } else {
+ pr_err("dwc3: no space for new device\n");
+ id = -ENOMEM;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(dwc3_get_device_id);
+
+void dwc3_put_device_id(int id)
+{
+ int ret;
+
+ if (id < 0)
+ return;
+
+ ret = test_bit(id, dwc3_devs);
+ WARN(!ret, "dwc3: ID %d not in use\n", id);
+ clear_bit(id, dwc3_devs);
+}
+EXPORT_SYMBOL_GPL(dwc3_put_device_id);
+
+void dwc3_set_mode(struct dwc3 *dwc, u32 mode)
+{
+ u32 reg;
+
+ reg = dwc3_readl(dwc->regs, DWC3_GCTL);
+ reg &= ~(DWC3_GCTL_PRTCAPDIR(DWC3_GCTL_PRTCAP_OTG));
+ reg |= DWC3_GCTL_PRTCAPDIR(mode);
+ dwc3_writel(dwc->regs, DWC3_GCTL, reg);
+}
+
/**
* dwc3_core_soft_reset - Issues core soft reset and PHY reset
* @dwc: pointer to our context structure
@@ -150,7 +204,7 @@ static void dwc3_free_event_buffers(struct dwc3 *dwc)
struct dwc3_event_buffer *evt;
int i;
- for (i = 0; i < DWC3_EVENT_BUFFERS_NUM; i++) {
+ for (i = 0; i < dwc->num_event_buffers; i++) {
evt = dwc->ev_buffs[i];
if (evt) {
dwc3_free_one_event_buffer(dwc, evt);
@@ -162,17 +216,25 @@ static void dwc3_free_event_buffers(struct dwc3 *dwc)
/**
* dwc3_alloc_event_buffers - Allocates @num event buffers of size @length
* @dwc: Pointer to out controller context structure
- * @num: number of event buffers to allocate
* @length: size of event buffer
*
* Returns 0 on success otherwise negative errno. In error the case, dwc
* may contain some buffers allocated but not all which were requested.
*/
-static int __devinit dwc3_alloc_event_buffers(struct dwc3 *dwc, unsigned num,
- unsigned length)
+static int __devinit dwc3_alloc_event_buffers(struct dwc3 *dwc, unsigned length)
{
+ int num;
int i;
+ num = DWC3_NUM_INT(dwc->hwparams.hwparams1);
+ dwc->num_event_buffers = num;
+
+ dwc->ev_buffs = kzalloc(sizeof(*dwc->ev_buffs) * num, GFP_KERNEL);
+ if (!dwc->ev_buffs) {
+ dev_err(dwc->dev, "can't allocate event buffers array\n");
+ return -ENOMEM;
+ }
+
for (i = 0; i < num; i++) {
struct dwc3_event_buffer *evt;
@@ -198,7 +260,7 @@ static int __devinit dwc3_event_buffers_setup(struct dwc3 *dwc)
struct dwc3_event_buffer *evt;
int n;
- for (n = 0; n < DWC3_EVENT_BUFFERS_NUM; n++) {
+ for (n = 0; n < dwc->num_event_buffers; n++) {
evt = dwc->ev_buffs[n];
dev_dbg(dwc->dev, "Event buf %p dma %08llx length %d\n",
evt->buf, (unsigned long long) evt->dma,
@@ -221,7 +283,7 @@ static void dwc3_event_buffers_cleanup(struct dwc3 *dwc)
struct dwc3_event_buffer *evt;
int n;
- for (n = 0; n < DWC3_EVENT_BUFFERS_NUM; n++) {
+ for (n = 0; n < dwc->num_event_buffers; n++) {
evt = dwc->ev_buffs[n];
dwc3_writel(dwc->regs, DWC3_GEVNTADRLO(n), 0);
dwc3_writel(dwc->regs, DWC3_GEVNTADRHI(n), 0);
@@ -285,8 +347,32 @@ static int __devinit dwc3_core_init(struct dwc3 *dwc)
cpu_relax();
} while (true);
- ret = dwc3_alloc_event_buffers(dwc, DWC3_EVENT_BUFFERS_NUM,
- DWC3_EVENT_BUFFERS_SIZE);
+ dwc3_cache_hwparams(dwc);
+
+ reg = dwc3_readl(dwc->regs, DWC3_GCTL);
+ reg &= ~DWC3_GCTL_SCALEDOWN(3);
+ reg &= ~DWC3_GCTL_DISSCRAMBLE;
+
+ switch (DWC3_GHWPARAMS1_EN_PWROPT(dwc->hwparams.hwparams1)) {
+ case DWC3_GHWPARAMS1_EN_PWROPT_CLK:
+ reg &= ~DWC3_GCTL_DSBLCLKGTNG;
+ break;
+ default:
+ dev_dbg(dwc->dev, "No power optimization available\n");
+ }
+
+ /*
+ * WORKAROUND: DWC3 revisions <1.90a have a bug
+ * when The device fails to connect at SuperSpeed
+ * and falls back to high-speed mode which causes
+ * the device to enter in a Connect/Disconnect loop
+ */
+ if (dwc->revision < DWC3_REVISION_190A)
+ reg |= DWC3_GCTL_U2RSTECN;
+
+ dwc3_writel(dwc->regs, DWC3_GCTL, reg);
+
+ ret = dwc3_alloc_event_buffers(dwc, DWC3_EVENT_BUFFERS_SIZE);
if (ret) {
dev_err(dwc->dev, "failed to allocate event buffers\n");
ret = -ENOMEM;
@@ -299,8 +385,6 @@ static int __devinit dwc3_core_init(struct dwc3 *dwc)
goto err1;
}
- dwc3_cache_hwparams(dwc);
-
return 0;
err1:
@@ -320,15 +404,17 @@ static void dwc3_core_exit(struct dwc3 *dwc)
static int __devinit dwc3_probe(struct platform_device *pdev)
{
- const struct platform_device_id *id = platform_get_device_id(pdev);
struct resource *res;
struct dwc3 *dwc;
- void __iomem *regs;
- unsigned int features = id->driver_data;
+
int ret = -ENOMEM;
int irq;
+
+ void __iomem *regs;
void *mem;
+ u8 mode;
+
mem = kzalloc(sizeof(*dwc) + DWC3_ALIGN_MASK, GFP_KERNEL);
if (!mem) {
dev_err(&pdev->dev, "not enough memory\n");
@@ -343,6 +429,8 @@ static int __devinit dwc3_probe(struct platform_device *pdev)
goto err1;
}
+ dwc->res = res;
+
res = request_mem_region(res->start, resource_size(res),
dev_name(&pdev->dev));
if (!res) {
@@ -370,6 +458,17 @@ static int __devinit dwc3_probe(struct platform_device *pdev)
dwc->dev = &pdev->dev;
dwc->irq = irq;
+ if (!strncmp("super", maximum_speed, 5))
+ dwc->maximum_speed = DWC3_DCFG_SUPERSPEED;
+ else if (!strncmp("high", maximum_speed, 4))
+ dwc->maximum_speed = DWC3_DCFG_HIGHSPEED;
+ else if (!strncmp("full", maximum_speed, 4))
+ dwc->maximum_speed = DWC3_DCFG_FULLSPEED1;
+ else if (!strncmp("low", maximum_speed, 3))
+ dwc->maximum_speed = DWC3_DCFG_LOWSPEED;
+ else
+ dwc->maximum_speed = DWC3_DCFG_SUPERSPEED;
+
pm_runtime_enable(&pdev->dev);
pm_runtime_get_sync(&pdev->dev);
pm_runtime_forbid(&pdev->dev);
@@ -380,13 +479,44 @@ static int __devinit dwc3_probe(struct platform_device *pdev)
goto err3;
}
- if (features & DWC3_HAS_PERIPHERAL) {
+ mode = DWC3_MODE(dwc->hwparams.hwparams0);
+
+ switch (mode) {
+ case DWC3_MODE_DEVICE:
+ dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_DEVICE);
ret = dwc3_gadget_init(dwc);
if (ret) {
- dev_err(&pdev->dev, "failed to initialized gadget\n");
+ dev_err(&pdev->dev, "failed to initialize gadget\n");
goto err4;
}
+ break;
+ case DWC3_MODE_HOST:
+ dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_HOST);
+ ret = dwc3_host_init(dwc);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to initialize host\n");
+ goto err4;
+ }
+ break;
+ case DWC3_MODE_DRD:
+ dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_OTG);
+ ret = dwc3_host_init(dwc);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to initialize host\n");
+ goto err4;
+ }
+
+ ret = dwc3_gadget_init(dwc);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to initialize gadget\n");
+ goto err4;
+ }
+ break;
+ default:
+ dev_err(&pdev->dev, "Unsupported mode of operation %d\n", mode);
+ goto err4;
}
+ dwc->mode = mode;
ret = dwc3_debugfs_init(dwc);
if (ret) {
@@ -399,8 +529,21 @@ static int __devinit dwc3_probe(struct platform_device *pdev)
return 0;
err5:
- if (features & DWC3_HAS_PERIPHERAL)
+ switch (mode) {
+ case DWC3_MODE_DEVICE:
+ dwc3_gadget_exit(dwc);
+ break;
+ case DWC3_MODE_HOST:
+ dwc3_host_exit(dwc);
+ break;
+ case DWC3_MODE_DRD:
+ dwc3_host_exit(dwc);
dwc3_gadget_exit(dwc);
+ break;
+ default:
+ /* do nothing */
+ break;
+ }
err4:
dwc3_core_exit(dwc);
@@ -420,10 +563,8 @@ err0:
static int __devexit dwc3_remove(struct platform_device *pdev)
{
- const struct platform_device_id *id = platform_get_device_id(pdev);
struct dwc3 *dwc = platform_get_drvdata(pdev);
struct resource *res;
- unsigned int features = id->driver_data;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
@@ -432,8 +573,21 @@ static int __devexit dwc3_remove(struct platform_device *pdev)
dwc3_debugfs_exit(dwc);
- if (features & DWC3_HAS_PERIPHERAL)
+ switch (dwc->mode) {
+ case DWC3_MODE_DEVICE:
+ dwc3_gadget_exit(dwc);
+ break;
+ case DWC3_MODE_HOST:
+ dwc3_host_exit(dwc);
+ break;
+ case DWC3_MODE_DRD:
+ dwc3_host_exit(dwc);
dwc3_gadget_exit(dwc);
+ break;
+ default:
+ /* do nothing */
+ break;
+ }
dwc3_core_exit(dwc);
release_mem_region(res->start, resource_size(res));
@@ -443,30 +597,15 @@ static int __devexit dwc3_remove(struct platform_device *pdev)
return 0;
}
-static const struct platform_device_id dwc3_id_table[] __devinitconst = {
- {
- .name = "dwc3-omap",
- .driver_data = (DWC3_HAS_PERIPHERAL
- | DWC3_HAS_XHCI
- | DWC3_HAS_OTG),
- },
- {
- .name = "dwc3-pci",
- .driver_data = DWC3_HAS_PERIPHERAL,
- },
- { }, /* Terminating Entry */
-};
-MODULE_DEVICE_TABLE(platform, dwc3_id_table);
-
static struct platform_driver dwc3_driver = {
.probe = dwc3_probe,
.remove = __devexit_p(dwc3_remove),
.driver = {
.name = "dwc3",
},
- .id_table = dwc3_id_table,
};
+MODULE_ALIAS("platform:dwc3");
MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
MODULE_LICENSE("Dual BSD/GPL");
MODULE_DESCRIPTION("DesignWare USB3 DRD Controller Driver");