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path: root/drivers/usb/dwc3
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-rw-r--r--drivers/usb/dwc3/core.c251
-rw-r--r--drivers/usb/dwc3/core.h105
-rw-r--r--drivers/usb/dwc3/dwc3-omap.c5
-rw-r--r--drivers/usb/dwc3/gadget.c183
-rw-r--r--drivers/usb/dwc3/gadget.h12
5 files changed, 455 insertions, 101 deletions
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index a49217ae3533..d001417e8e37 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -61,9 +61,10 @@ void dwc3_set_mode(struct dwc3 *dwc, u32 mode)
* dwc3_core_soft_reset - Issues core soft reset and PHY reset
* @dwc: pointer to our context structure
*/
-static void dwc3_core_soft_reset(struct dwc3 *dwc)
+static int dwc3_core_soft_reset(struct dwc3 *dwc)
{
u32 reg;
+ int ret;
/* Before Resetting PHY, put Core in Reset */
reg = dwc3_readl(dwc->regs, DWC3_GCTL);
@@ -82,6 +83,15 @@ static void dwc3_core_soft_reset(struct dwc3 *dwc)
usb_phy_init(dwc->usb2_phy);
usb_phy_init(dwc->usb3_phy);
+ ret = phy_init(dwc->usb2_generic_phy);
+ if (ret < 0)
+ return ret;
+
+ ret = phy_init(dwc->usb3_generic_phy);
+ if (ret < 0) {
+ phy_exit(dwc->usb2_generic_phy);
+ return ret;
+ }
mdelay(100);
/* Clear USB3 PHY reset */
@@ -100,6 +110,8 @@ static void dwc3_core_soft_reset(struct dwc3 *dwc)
reg = dwc3_readl(dwc->regs, DWC3_GCTL);
reg &= ~DWC3_GCTL_CORESOFTRESET;
dwc3_writel(dwc->regs, DWC3_GCTL, reg);
+
+ return 0;
}
/**
@@ -242,6 +254,90 @@ static void dwc3_event_buffers_cleanup(struct dwc3 *dwc)
}
}
+static int dwc3_alloc_scratch_buffers(struct dwc3 *dwc)
+{
+ if (!dwc->has_hibernation)
+ return 0;
+
+ if (!dwc->nr_scratch)
+ return 0;
+
+ dwc->scratchbuf = kmalloc_array(dwc->nr_scratch,
+ DWC3_SCRATCHBUF_SIZE, GFP_KERNEL);
+ if (!dwc->scratchbuf)
+ return -ENOMEM;
+
+ return 0;
+}
+
+static int dwc3_setup_scratch_buffers(struct dwc3 *dwc)
+{
+ dma_addr_t scratch_addr;
+ u32 param;
+ int ret;
+
+ if (!dwc->has_hibernation)
+ return 0;
+
+ if (!dwc->nr_scratch)
+ return 0;
+
+ /* should never fall here */
+ if (!WARN_ON(dwc->scratchbuf))
+ return 0;
+
+ scratch_addr = dma_map_single(dwc->dev, dwc->scratchbuf,
+ dwc->nr_scratch * DWC3_SCRATCHBUF_SIZE,
+ DMA_BIDIRECTIONAL);
+ if (dma_mapping_error(dwc->dev, scratch_addr)) {
+ dev_err(dwc->dev, "failed to map scratch buffer\n");
+ ret = -EFAULT;
+ goto err0;
+ }
+
+ dwc->scratch_addr = scratch_addr;
+
+ param = lower_32_bits(scratch_addr);
+
+ ret = dwc3_send_gadget_generic_command(dwc,
+ DWC3_DGCMD_SET_SCRATCHPAD_ADDR_LO, param);
+ if (ret < 0)
+ goto err1;
+
+ param = upper_32_bits(scratch_addr);
+
+ ret = dwc3_send_gadget_generic_command(dwc,
+ DWC3_DGCMD_SET_SCRATCHPAD_ADDR_HI, param);
+ if (ret < 0)
+ goto err1;
+
+ return 0;
+
+err1:
+ dma_unmap_single(dwc->dev, dwc->scratch_addr, dwc->nr_scratch *
+ DWC3_SCRATCHBUF_SIZE, DMA_BIDIRECTIONAL);
+
+err0:
+ return ret;
+}
+
+static void dwc3_free_scratch_buffers(struct dwc3 *dwc)
+{
+ if (!dwc->has_hibernation)
+ return;
+
+ if (!dwc->nr_scratch)
+ return;
+
+ /* should never fall here */
+ if (!WARN_ON(dwc->scratchbuf))
+ return;
+
+ dma_unmap_single(dwc->dev, dwc->scratch_addr, dwc->nr_scratch *
+ DWC3_SCRATCHBUF_SIZE, DMA_BIDIRECTIONAL);
+ kfree(dwc->scratchbuf);
+}
+
static void dwc3_core_num_eps(struct dwc3 *dwc)
{
struct dwc3_hwparams *parms = &dwc->hwparams;
@@ -277,6 +373,7 @@ static void dwc3_cache_hwparams(struct dwc3 *dwc)
static int dwc3_core_init(struct dwc3 *dwc)
{
unsigned long timeout;
+ u32 hwparams4 = dwc->hwparams.hwparams4;
u32 reg;
int ret;
@@ -306,7 +403,9 @@ static int dwc3_core_init(struct dwc3 *dwc)
cpu_relax();
} while (true);
- dwc3_core_soft_reset(dwc);
+ ret = dwc3_core_soft_reset(dwc);
+ if (ret)
+ goto err0;
reg = dwc3_readl(dwc->regs, DWC3_GCTL);
reg &= ~DWC3_GCTL_SCALEDOWN_MASK;
@@ -314,7 +413,29 @@ static int dwc3_core_init(struct dwc3 *dwc)
switch (DWC3_GHWPARAMS1_EN_PWROPT(dwc->hwparams.hwparams1)) {
case DWC3_GHWPARAMS1_EN_PWROPT_CLK:
- reg &= ~DWC3_GCTL_DSBLCLKGTNG;
+ /**
+ * WORKAROUND: DWC3 revisions between 2.10a and 2.50a have an
+ * issue which would cause xHCI compliance tests to fail.
+ *
+ * Because of that we cannot enable clock gating on such
+ * configurations.
+ *
+ * Refers to:
+ *
+ * STAR#9000588375: Clock Gating, SOF Issues when ref_clk-Based
+ * SOF/ITP Mode Used
+ */
+ if ((dwc->dr_mode == USB_DR_MODE_HOST ||
+ dwc->dr_mode == USB_DR_MODE_OTG) &&
+ (dwc->revision >= DWC3_REVISION_210A &&
+ dwc->revision <= DWC3_REVISION_250A))
+ reg |= DWC3_GCTL_DSBLCLKGTNG | DWC3_GCTL_SOFITPSYNC;
+ else
+ reg &= ~DWC3_GCTL_DSBLCLKGTNG;
+ break;
+ case DWC3_GHWPARAMS1_EN_PWROPT_HIB:
+ /* enable hibernation here */
+ dwc->nr_scratch = DWC3_GHWPARAMS4_HIBER_SCRATCHBUFS(hwparams4);
break;
default:
dev_dbg(dwc->dev, "No power optimization available\n");
@@ -333,16 +454,36 @@ static int dwc3_core_init(struct dwc3 *dwc)
dwc3_writel(dwc->regs, DWC3_GCTL, reg);
+ ret = dwc3_alloc_scratch_buffers(dwc);
+ if (ret)
+ goto err1;
+
+ ret = dwc3_setup_scratch_buffers(dwc);
+ if (ret)
+ goto err2;
+
return 0;
+err2:
+ dwc3_free_scratch_buffers(dwc);
+
+err1:
+ usb_phy_shutdown(dwc->usb2_phy);
+ usb_phy_shutdown(dwc->usb3_phy);
+ phy_exit(dwc->usb2_generic_phy);
+ phy_exit(dwc->usb3_generic_phy);
+
err0:
return ret;
}
static void dwc3_core_exit(struct dwc3 *dwc)
{
+ dwc3_free_scratch_buffers(dwc);
usb_phy_shutdown(dwc->usb2_phy);
usb_phy_shutdown(dwc->usb3_phy);
+ phy_exit(dwc->usb2_generic_phy);
+ phy_exit(dwc->usb3_generic_phy);
}
#define DWC3_ALIGN_MASK (16 - 1)
@@ -411,32 +552,52 @@ static int dwc3_probe(struct platform_device *pdev)
if (IS_ERR(dwc->usb2_phy)) {
ret = PTR_ERR(dwc->usb2_phy);
-
- /*
- * if -ENXIO is returned, it means PHY layer wasn't
- * enabled, so it makes no sense to return -EPROBE_DEFER
- * in that case, since no PHY driver will ever probe.
- */
- if (ret == -ENXIO)
+ if (ret == -ENXIO || ret == -ENODEV) {
+ dwc->usb2_phy = NULL;
+ } else if (ret == -EPROBE_DEFER) {
return ret;
-
- dev_err(dev, "no usb2 phy configured\n");
- return -EPROBE_DEFER;
+ } else {
+ dev_err(dev, "no usb2 phy configured\n");
+ return ret;
+ }
}
if (IS_ERR(dwc->usb3_phy)) {
ret = PTR_ERR(dwc->usb3_phy);
+ if (ret == -ENXIO || ret == -ENODEV) {
+ dwc->usb3_phy = NULL;
+ } else if (ret == -EPROBE_DEFER) {
+ return ret;
+ } else {
+ dev_err(dev, "no usb3 phy configured\n");
+ return ret;
+ }
+ }
- /*
- * if -ENXIO is returned, it means PHY layer wasn't
- * enabled, so it makes no sense to return -EPROBE_DEFER
- * in that case, since no PHY driver will ever probe.
- */
- if (ret == -ENXIO)
+ dwc->usb2_generic_phy = devm_phy_get(dev, "usb2-phy");
+ if (IS_ERR(dwc->usb2_generic_phy)) {
+ ret = PTR_ERR(dwc->usb2_generic_phy);
+ if (ret == -ENOSYS || ret == -ENODEV) {
+ dwc->usb2_generic_phy = NULL;
+ } else if (ret == -EPROBE_DEFER) {
+ return ret;
+ } else {
+ dev_err(dev, "no usb2 phy configured\n");
return ret;
+ }
+ }
- dev_err(dev, "no usb3 phy configured\n");
- return -EPROBE_DEFER;
+ dwc->usb3_generic_phy = devm_phy_get(dev, "usb3-phy");
+ if (IS_ERR(dwc->usb3_generic_phy)) {
+ ret = PTR_ERR(dwc->usb3_generic_phy);
+ if (ret == -ENOSYS || ret == -ENODEV) {
+ dwc->usb3_generic_phy = NULL;
+ } else if (ret == -EPROBE_DEFER) {
+ return ret;
+ } else {
+ dev_err(dev, "no usb3 phy configured\n");
+ return ret;
+ }
}
dwc->xhci_resources[0].start = res->start;
@@ -479,6 +640,14 @@ static int dwc3_probe(struct platform_device *pdev)
goto err0;
}
+ if (IS_ENABLED(CONFIG_USB_DWC3_HOST))
+ dwc->dr_mode = USB_DR_MODE_HOST;
+ else if (IS_ENABLED(CONFIG_USB_DWC3_GADGET))
+ dwc->dr_mode = USB_DR_MODE_PERIPHERAL;
+
+ if (dwc->dr_mode == USB_DR_MODE_UNKNOWN)
+ dwc->dr_mode = USB_DR_MODE_OTG;
+
ret = dwc3_core_init(dwc);
if (ret) {
dev_err(dev, "failed to initialize core\n");
@@ -487,21 +656,20 @@ static int dwc3_probe(struct platform_device *pdev)
usb_phy_set_suspend(dwc->usb2_phy, 0);
usb_phy_set_suspend(dwc->usb3_phy, 0);
+ ret = phy_power_on(dwc->usb2_generic_phy);
+ if (ret < 0)
+ goto err1;
+
+ ret = phy_power_on(dwc->usb3_generic_phy);
+ if (ret < 0)
+ goto err_usb2phy_power;
ret = dwc3_event_buffers_setup(dwc);
if (ret) {
dev_err(dwc->dev, "failed to setup event buffers\n");
- goto err1;
+ goto err_usb3phy_power;
}
- if (IS_ENABLED(CONFIG_USB_DWC3_HOST))
- dwc->dr_mode = USB_DR_MODE_HOST;
- else if (IS_ENABLED(CONFIG_USB_DWC3_GADGET))
- dwc->dr_mode = USB_DR_MODE_PERIPHERAL;
-
- if (dwc->dr_mode == USB_DR_MODE_UNKNOWN)
- dwc->dr_mode = USB_DR_MODE_OTG;
-
switch (dwc->dr_mode) {
case USB_DR_MODE_PERIPHERAL:
dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_DEVICE);
@@ -568,6 +736,12 @@ err3:
err2:
dwc3_event_buffers_cleanup(dwc);
+err_usb3phy_power:
+ phy_power_off(dwc->usb3_generic_phy);
+
+err_usb2phy_power:
+ phy_power_off(dwc->usb2_generic_phy);
+
err1:
usb_phy_set_suspend(dwc->usb2_phy, 1);
usb_phy_set_suspend(dwc->usb3_phy, 1);
@@ -585,6 +759,8 @@ static int dwc3_remove(struct platform_device *pdev)
usb_phy_set_suspend(dwc->usb2_phy, 1);
usb_phy_set_suspend(dwc->usb3_phy, 1);
+ phy_power_off(dwc->usb2_generic_phy);
+ phy_power_off(dwc->usb3_generic_phy);
pm_runtime_put_sync(&pdev->dev);
pm_runtime_disable(&pdev->dev);
@@ -682,6 +858,8 @@ static int dwc3_suspend(struct device *dev)
usb_phy_shutdown(dwc->usb3_phy);
usb_phy_shutdown(dwc->usb2_phy);
+ phy_exit(dwc->usb2_generic_phy);
+ phy_exit(dwc->usb3_generic_phy);
return 0;
}
@@ -690,9 +868,17 @@ static int dwc3_resume(struct device *dev)
{
struct dwc3 *dwc = dev_get_drvdata(dev);
unsigned long flags;
+ int ret;
usb_phy_init(dwc->usb3_phy);
usb_phy_init(dwc->usb2_phy);
+ ret = phy_init(dwc->usb2_generic_phy);
+ if (ret < 0)
+ return ret;
+
+ ret = phy_init(dwc->usb3_generic_phy);
+ if (ret < 0)
+ goto err_usb2phy_init;
spin_lock_irqsave(&dwc->lock, flags);
@@ -716,6 +902,11 @@ static int dwc3_resume(struct device *dev)
pm_runtime_enable(dev);
return 0;
+
+err_usb2phy_init:
+ phy_exit(dwc->usb2_generic_phy);
+
+ return ret;
}
static const struct dev_pm_ops dwc3_dev_pm_ops = {
diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
index f8af8d44af85..57332e3768e4 100644
--- a/drivers/usb/dwc3/core.h
+++ b/drivers/usb/dwc3/core.h
@@ -31,11 +31,14 @@
#include <linux/usb/gadget.h>
#include <linux/usb/otg.h>
+#include <linux/phy/phy.h>
+
/* Global constants */
#define DWC3_EP0_BOUNCE_SIZE 512
#define DWC3_ENDPOINTS_NUM 32
#define DWC3_XHCI_RESOURCES_NUM 2
+#define DWC3_SCRATCHBUF_SIZE 4096 /* each buffer is assumed to be 4KiB */
#define DWC3_EVENT_SIZE 4 /* bytes */
#define DWC3_EVENT_MAX_NUM 64 /* 2 events/endpoint */
#define DWC3_EVENT_BUFFERS_SIZE (DWC3_EVENT_SIZE * DWC3_EVENT_MAX_NUM)
@@ -157,6 +160,7 @@
#define DWC3_GCTL_PRTCAP_OTG 3
#define DWC3_GCTL_CORESOFTRESET (1 << 11)
+#define DWC3_GCTL_SOFITPSYNC (1 << 10)
#define DWC3_GCTL_SCALEDOWN(n) ((n) << 4)
#define DWC3_GCTL_SCALEDOWN_MASK DWC3_GCTL_SCALEDOWN(3)
#define DWC3_GCTL_DISSCRAMBLE (1 << 3)
@@ -318,7 +322,7 @@
/* Device Endpoint Command Register */
#define DWC3_DEPCMD_PARAM_SHIFT 16
#define DWC3_DEPCMD_PARAM(x) ((x) << DWC3_DEPCMD_PARAM_SHIFT)
-#define DWC3_DEPCMD_GET_RSC_IDX(x) (((x) >> DWC3_DEPCMD_PARAM_SHIFT) & 0x7f)
+#define DWC3_DEPCMD_GET_RSC_IDX(x) (((x) >> DWC3_DEPCMD_PARAM_SHIFT) & 0x7f)
#define DWC3_DEPCMD_STATUS(x) (((x) >> 15) & 1)
#define DWC3_DEPCMD_HIPRI_FORCERM (1 << 11)
#define DWC3_DEPCMD_CMDACT (1 << 10)
@@ -393,6 +397,7 @@ struct dwc3_event_buffer {
* @busy_slot: first slot which is owned by HW
* @desc: usb_endpoint_descriptor pointer
* @dwc: pointer to DWC controller
+ * @saved_state: ep state saved during hibernation
* @flags: endpoint flags (wedged, stalled, ...)
* @current_trb: index of current used trb
* @number: endpoint number (1 - 15)
@@ -415,6 +420,7 @@ struct dwc3_ep {
const struct usb_ss_ep_comp_descriptor *comp_desc;
struct dwc3 *dwc;
+ u32 saved_state;
unsigned flags;
#define DWC3_EP_ENABLED (1 << 0)
#define DWC3_EP_STALL (1 << 1)
@@ -598,6 +604,7 @@ struct dwc3_scratchpad_array {
* @ep0_trb: dma address of ep0_trb
* @ep0_usb_req: dummy req used while handling STD USB requests
* @ep0_bounce_addr: dma address of ep0_bounce
+ * @scratch_addr: dma address of scratchbuf
* @lock: for synchronizing
* @dev: pointer to our struct device
* @xhci: pointer to our xHCI child
@@ -606,6 +613,7 @@ struct dwc3_scratchpad_array {
* @gadget_driver: pointer to the gadget driver
* @regs: base address for our registers
* @regs_size: address space size
+ * @nr_scratch: number of scratch buffers
* @num_event_buffers: calculated number of event buffers
* @u1u2: only used on revisions <1.83a for workaround
* @maximum_speed: maximum speed requested (mainly for testing purposes)
@@ -613,16 +621,10 @@ struct dwc3_scratchpad_array {
* @dr_mode: requested mode of operation
* @usb2_phy: pointer to USB2 PHY
* @usb3_phy: pointer to USB3 PHY
+ * @usb2_generic_phy: pointer to USB2 PHY
+ * @usb3_generic_phy: pointer to USB3 PHY
* @dcfg: saved contents of DCFG register
* @gctl: saved contents of GCTL register
- * @is_selfpowered: true when we are selfpowered
- * @three_stage_setup: set if we perform a three phase setup
- * @ep0_bounced: true when we used bounce buffer
- * @ep0_expect_in: true when we expect a DATA IN transfer
- * @start_config_issued: true when StartConfig command has been issued
- * @setup_packet_pending: true when there's a Setup Packet in FIFO. Workaround
- * @needs_fifo_resize: not all users might want fifo resizing, flag it
- * @resize_fifos: tells us it's ok to reconfigure our TxFIFO sizes.
* @isoch_delay: wValue from Set Isochronous Delay request;
* @u2sel: parameter from Set SEL request.
* @u2pel: parameter from Set SEL request.
@@ -637,15 +639,31 @@ struct dwc3_scratchpad_array {
* @mem: points to start of memory which is used for this struct.
* @hwparams: copy of hwparams registers
* @root: debugfs root folder pointer
+ * @regset: debugfs pointer to regdump file
+ * @test_mode: true when we're entering a USB test mode
+ * @test_mode_nr: test feature selector
+ * @delayed_status: true when gadget driver asks for delayed status
+ * @ep0_bounced: true when we used bounce buffer
+ * @ep0_expect_in: true when we expect a DATA IN transfer
+ * @has_hibernation: true when dwc3 was configured with Hibernation
+ * @is_selfpowered: true when we are selfpowered
+ * @needs_fifo_resize: not all users might want fifo resizing, flag it
+ * @pullups_connected: true when Run/Stop bit is set
+ * @resize_fifos: tells us it's ok to reconfigure our TxFIFO sizes.
+ * @setup_packet_pending: true when there's a Setup Packet in FIFO. Workaround
+ * @start_config_issued: true when StartConfig command has been issued
+ * @three_stage_setup: set if we perform a three phase setup
*/
struct dwc3 {
struct usb_ctrlrequest *ctrl_req;
struct dwc3_trb *ep0_trb;
void *ep0_bounce;
+ void *scratchbuf;
u8 *setup_buf;
dma_addr_t ctrl_req_addr;
dma_addr_t ep0_trb_addr;
dma_addr_t ep0_bounce_addr;
+ dma_addr_t scratch_addr;
struct dwc3_request ep0_usb_req;
/* device lock */
@@ -665,6 +683,9 @@ struct dwc3 {
struct usb_phy *usb2_phy;
struct usb_phy *usb3_phy;
+ struct phy *usb2_generic_phy;
+ struct phy *usb3_generic_phy;
+
void __iomem *regs;
size_t regs_size;
@@ -674,6 +695,7 @@ struct dwc3 {
u32 dcfg;
u32 gctl;
+ u32 nr_scratch;
u32 num_event_buffers;
u32 u1u2;
u32 maximum_speed;
@@ -695,17 +717,9 @@ struct dwc3 {
#define DWC3_REVISION_230A 0x5533230a
#define DWC3_REVISION_240A 0x5533240a
#define DWC3_REVISION_250A 0x5533250a
-
- unsigned is_selfpowered:1;
- unsigned three_stage_setup:1;
- unsigned ep0_bounced:1;
- unsigned ep0_expect_in:1;
- unsigned start_config_issued:1;
- unsigned setup_packet_pending:1;
- unsigned delayed_status:1;
- unsigned needs_fifo_resize:1;
- unsigned resize_fifos:1;
- unsigned pullups_connected:1;
+#define DWC3_REVISION_260A 0x5533260a
+#define DWC3_REVISION_270A 0x5533270a
+#define DWC3_REVISION_280A 0x5533280a
enum dwc3_ep0_next ep0_next_event;
enum dwc3_ep0_state ep0state;
@@ -730,6 +744,18 @@ struct dwc3 {
u8 test_mode;
u8 test_mode_nr;
+
+ unsigned delayed_status:1;
+ unsigned ep0_bounced:1;
+ unsigned ep0_expect_in:1;
+ unsigned has_hibernation:1;
+ unsigned is_selfpowered:1;
+ unsigned needs_fifo_resize:1;
+ unsigned pullups_connected:1;
+ unsigned resize_fifos:1;
+ unsigned setup_packet_pending:1;
+ unsigned start_config_issued:1;
+ unsigned three_stage_setup:1;
};
/* -------------------------------------------------------------------------- */
@@ -815,15 +841,15 @@ struct dwc3_event_depevt {
* 12 - VndrDevTstRcved
* @reserved15_12: Reserved, not used
* @event_info: Information about this event
- * @reserved31_24: Reserved, not used
+ * @reserved31_25: Reserved, not used
*/
struct dwc3_event_devt {
u32 one_bit:1;
u32 device_event:7;
u32 type:4;
u32 reserved15_12:4;
- u32 event_info:8;
- u32 reserved31_24:8;
+ u32 event_info:9;
+ u32 reserved31_25:7;
} __packed;
/**
@@ -856,6 +882,19 @@ union dwc3_event {
struct dwc3_event_gevt gevt;
};
+/**
+ * struct dwc3_gadget_ep_cmd_params - representation of endpoint command
+ * parameters
+ * @param2: third parameter
+ * @param1: second parameter
+ * @param0: first parameter
+ */
+struct dwc3_gadget_ep_cmd_params {
+ u32 param2;
+ u32 param1;
+ u32 param0;
+};
+
/*
* DWC3 Features to be used as Driver Data
*/
@@ -881,11 +920,31 @@ static inline void dwc3_host_exit(struct dwc3 *dwc)
#if IS_ENABLED(CONFIG_USB_DWC3_GADGET) || IS_ENABLED(CONFIG_USB_DWC3_DUAL_ROLE)
int dwc3_gadget_init(struct dwc3 *dwc);
void dwc3_gadget_exit(struct dwc3 *dwc);
+int dwc3_gadget_set_test_mode(struct dwc3 *dwc, int mode);
+int dwc3_gadget_get_link_state(struct dwc3 *dwc);
+int dwc3_gadget_set_link_state(struct dwc3 *dwc, enum dwc3_link_state state);
+int dwc3_send_gadget_ep_cmd(struct dwc3 *dwc, unsigned ep,
+ unsigned cmd, struct dwc3_gadget_ep_cmd_params *params);
+int dwc3_send_gadget_generic_command(struct dwc3 *dwc, int cmd, u32 param);
#else
static inline int dwc3_gadget_init(struct dwc3 *dwc)
{ return 0; }
static inline void dwc3_gadget_exit(struct dwc3 *dwc)
{ }
+static inline int dwc3_gadget_set_test_mode(struct dwc3 *dwc, int mode)
+{ return 0; }
+static inline int dwc3_gadget_get_link_state(struct dwc3 *dwc)
+{ return 0; }
+static inline int dwc3_gadget_set_link_state(struct dwc3 *dwc,
+ enum dwc3_link_state state)
+{ return 0; }
+
+static inline int dwc3_send_gadget_ep_cmd(struct dwc3 *dwc, unsigned ep,
+ unsigned cmd, struct dwc3_gadget_ep_cmd_params *params)
+{ return 0; }
+static inline int dwc3_send_gadget_generic_command(struct dwc3 *dwc,
+ int cmd, u32 param)
+{ return 0; }
#endif
/* power management interface */
diff --git a/drivers/usb/dwc3/dwc3-omap.c b/drivers/usb/dwc3/dwc3-omap.c
index b1d7ee6e40b7..1160ff41bed4 100644
--- a/drivers/usb/dwc3/dwc3-omap.c
+++ b/drivers/usb/dwc3/dwc3-omap.c
@@ -423,11 +423,6 @@ static int dwc3_omap_probe(struct platform_device *pdev)
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!res) {
- dev_err(dev, "missing memory base resource\n");
- return -EINVAL;
- }
-
base = devm_ioremap_resource(dev, res);
if (IS_ERR(base))
return PTR_ERR(base);
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 2da0a5a2803a..a740eac74d56 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -68,6 +68,22 @@ int dwc3_gadget_set_test_mode(struct dwc3 *dwc, int mode)
}
/**
+ * dwc3_gadget_get_link_state - Gets current state of USB Link
+ * @dwc: pointer to our context structure
+ *
+ * Caller should take care of locking. This function will
+ * return the link state on success (>= 0) or -ETIMEDOUT.
+ */
+int dwc3_gadget_get_link_state(struct dwc3 *dwc)
+{
+ u32 reg;
+
+ reg = dwc3_readl(dwc->regs, DWC3_DSTS);
+
+ return DWC3_DSTS_USBLNKST(reg);
+}
+
+/**
* dwc3_gadget_set_link_state - Sets USB Link to a particular State
* @dwc: pointer to our context structure
* @state: the state to put link into
@@ -417,7 +433,7 @@ static int dwc3_gadget_start_config(struct dwc3 *dwc, struct dwc3_ep *dep)
static int dwc3_gadget_set_ep_config(struct dwc3 *dwc, struct dwc3_ep *dep,
const struct usb_endpoint_descriptor *desc,
const struct usb_ss_ep_comp_descriptor *comp_desc,
- bool ignore)
+ bool ignore, bool restore)
{
struct dwc3_gadget_ep_cmd_params params;
@@ -436,6 +452,11 @@ static int dwc3_gadget_set_ep_config(struct dwc3 *dwc, struct dwc3_ep *dep,
if (ignore)
params.param0 |= DWC3_DEPCFG_IGN_SEQ_NUM;
+ if (restore) {
+ params.param0 |= DWC3_DEPCFG_ACTION_RESTORE;
+ params.param2 |= dep->saved_state;
+ }
+
params.param1 = DWC3_DEPCFG_XFER_COMPLETE_EN
| DWC3_DEPCFG_XFER_NOT_READY_EN;
@@ -494,7 +515,7 @@ static int dwc3_gadget_set_xfer_resource(struct dwc3 *dwc, struct dwc3_ep *dep)
static int __dwc3_gadget_ep_enable(struct dwc3_ep *dep,
const struct usb_endpoint_descriptor *desc,
const struct usb_ss_ep_comp_descriptor *comp_desc,
- bool ignore)
+ bool ignore, bool restore)
{
struct dwc3 *dwc = dep->dwc;
u32 reg;
@@ -508,7 +529,8 @@ static int __dwc3_gadget_ep_enable(struct dwc3_ep *dep,
return ret;
}
- ret = dwc3_gadget_set_ep_config(dwc, dep, desc, comp_desc, ignore);
+ ret = dwc3_gadget_set_ep_config(dwc, dep, desc, comp_desc, ignore,
+ restore);
if (ret)
return ret;
@@ -548,13 +570,13 @@ static int __dwc3_gadget_ep_enable(struct dwc3_ep *dep,
return 0;
}
-static void dwc3_stop_active_transfer(struct dwc3 *dwc, u32 epnum);
+static void dwc3_stop_active_transfer(struct dwc3 *dwc, u32 epnum, bool force);
static void dwc3_remove_requests(struct dwc3 *dwc, struct dwc3_ep *dep)
{
struct dwc3_request *req;
if (!list_empty(&dep->req_queued)) {
- dwc3_stop_active_transfer(dwc, dep->number);
+ dwc3_stop_active_transfer(dwc, dep->number, true);
/* - giveback all requests to gadget driver */
while (!list_empty(&dep->req_queued)) {
@@ -659,7 +681,7 @@ static int dwc3_gadget_ep_enable(struct usb_ep *ep,
}
spin_lock_irqsave(&dwc->lock, flags);
- ret = __dwc3_gadget_ep_enable(dep, desc, ep->comp_desc, false);
+ ret = __dwc3_gadget_ep_enable(dep, desc, ep->comp_desc, false, false);
spin_unlock_irqrestore(&dwc->lock, flags);
return ret;
@@ -771,9 +793,6 @@ static void dwc3_prepare_one_trb(struct dwc3_ep *dep,
trb->ctrl = DWC3_TRBCTL_ISOCHRONOUS_FIRST;
else
trb->ctrl = DWC3_TRBCTL_ISOCHRONOUS;
-
- if (!req->request.no_interrupt && !chain)
- trb->ctrl |= DWC3_TRB_CTRL_IOC;
break;
case USB_ENDPOINT_XFER_BULK:
@@ -788,6 +807,9 @@ static void dwc3_prepare_one_trb(struct dwc3_ep *dep,
BUG();
}
+ if (!req->request.no_interrupt && !chain)
+ trb->ctrl |= DWC3_TRB_CTRL_IOC;
+
if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) {
trb->ctrl |= DWC3_TRB_CTRL_ISP_IMI;
trb->ctrl |= DWC3_TRB_CTRL_CSP;
@@ -1077,7 +1099,7 @@ static int __dwc3_gadget_ep_queue(struct dwc3_ep *dep, struct dwc3_request *req)
*/
if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) {
if (list_empty(&dep->req_queued)) {
- dwc3_stop_active_transfer(dwc, dep->number);
+ dwc3_stop_active_transfer(dwc, dep->number, true);
dep->flags = DWC3_EP_ENABLED;
}
return 0;
@@ -1107,6 +1129,23 @@ static int __dwc3_gadget_ep_queue(struct dwc3_ep *dep, struct dwc3_request *req)
return ret;
}
+ /*
+ * 4. Stream Capable Bulk Endpoints. We need to start the transfer
+ * right away, otherwise host will not know we have streams to be
+ * handled.
+ */
+ if (dep->stream_capable) {
+ int ret;
+
+ ret = __dwc3_gadget_kick_transfer(dep, 0, true);
+ if (ret && ret != -EBUSY) {
+ struct dwc3 *dwc = dep->dwc;
+
+ dev_dbg(dwc->dev, "%s: failed to kick transfers\n",
+ dep->name);
+ }
+ }
+
return 0;
}
@@ -1163,7 +1202,7 @@ static int dwc3_gadget_ep_dequeue(struct usb_ep *ep,
}
if (r == req) {
/* wait until it is processed */
- dwc3_stop_active_transfer(dwc, dep->number);
+ dwc3_stop_active_transfer(dwc, dep->number, true);
goto out1;
}
dev_err(dwc->dev, "request %p was not queued to %s\n",
@@ -1194,8 +1233,7 @@ int __dwc3_gadget_ep_set_halt(struct dwc3_ep *dep, int value)
ret = dwc3_send_gadget_ep_cmd(dwc, dep->number,
DWC3_DEPCMD_SETSTALL, &params);
if (ret)
- dev_err(dwc->dev, "failed to %s STALL on %s\n",
- value ? "set" : "clear",
+ dev_err(dwc->dev, "failed to set STALL on %s\n",
dep->name);
else
dep->flags |= DWC3_EP_STALL;
@@ -1203,8 +1241,7 @@ int __dwc3_gadget_ep_set_halt(struct dwc3_ep *dep, int value)
ret = dwc3_send_gadget_ep_cmd(dwc, dep->number,
DWC3_DEPCMD_CLEARSTALL, &params);
if (ret)
- dev_err(dwc->dev, "failed to %s STALL on %s\n",
- value ? "set" : "clear",
+ dev_err(dwc->dev, "failed to clear STALL on %s\n",
dep->name);
else
dep->flags &= ~(DWC3_EP_STALL | DWC3_EP_WEDGE);
@@ -1387,7 +1424,7 @@ static int dwc3_gadget_set_selfpowered(struct usb_gadget *g,
return 0;
}
-static int dwc3_gadget_run_stop(struct dwc3 *dwc, int is_on)
+static int dwc3_gadget_run_stop(struct dwc3 *dwc, int is_on, int suspend)
{
u32 reg;
u32 timeout = 500;
@@ -1402,9 +1439,17 @@ static int dwc3_gadget_run_stop(struct dwc3 *dwc, int is_on)
if (dwc->revision >= DWC3_REVISION_194A)
reg &= ~DWC3_DCTL_KEEP_CONNECT;
reg |= DWC3_DCTL_RUN_STOP;
+
+ if (dwc->has_hibernation)
+ reg |= DWC3_DCTL_KEEP_CONNECT;
+
dwc->pullups_connected = true;
} else {
reg &= ~DWC3_DCTL_RUN_STOP;
+
+ if (dwc->has_hibernation && !suspend)
+ reg &= ~DWC3_DCTL_KEEP_CONNECT;
+
dwc->pullups_connected = false;
}
@@ -1442,7 +1487,7 @@ static int dwc3_gadget_pullup(struct usb_gadget *g, int is_on)
is_on = !!is_on;
spin_lock_irqsave(&dwc->lock, flags);
- ret = dwc3_gadget_run_stop(dwc, is_on);
+ ret = dwc3_gadget_run_stop(dwc, is_on, false);
spin_unlock_irqrestore(&dwc->lock, flags);
return ret;
@@ -1549,14 +1594,16 @@ static int dwc3_gadget_start(struct usb_gadget *g,
dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(512);
dep = dwc->eps[0];
- ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL, false);
+ ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL, false,
+ false);
if (ret) {
dev_err(dwc->dev, "failed to enable %s\n", dep->name);
goto err2;
}
dep = dwc->eps[1];
- ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL, false);
+ ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL, false,
+ false);
if (ret) {
dev_err(dwc->dev, "failed to enable %s\n", dep->name);
goto err3;
@@ -1849,15 +1896,12 @@ static int dwc3_cleanup_done_reqs(struct dwc3 *dwc, struct dwc3_ep *dep,
*/
dep->flags = DWC3_EP_PENDING_REQUEST;
} else {
- dwc3_stop_active_transfer(dwc, dep->number);
+ dwc3_stop_active_transfer(dwc, dep->number, true);
dep->flags = DWC3_EP_ENABLED;
}
return 1;
}
- if ((event->status & DEPEVT_STATUS_IOC) &&
- (trb->ctrl & DWC3_TRB_CTRL_IOC))
- return 0;
return 1;
}
@@ -1999,7 +2043,25 @@ static void dwc3_disconnect_gadget(struct dwc3 *dwc)
}
}
-static void dwc3_stop_active_transfer(struct dwc3 *dwc, u32 epnum)
+static void dwc3_suspend_gadget(struct dwc3 *dwc)
+{
+ if (dwc->gadget_driver && dwc->gadget_driver->suspend) {
+ spin_unlock(&dwc->lock);
+ dwc->gadget_driver->suspend(&dwc->gadget);
+ spin_lock(&dwc->lock);
+ }
+}
+
+static void dwc3_resume_gadget(struct dwc3 *dwc)
+{
+ if (dwc->gadget_driver && dwc->gadget_driver->resume) {
+ spin_unlock(&dwc->lock);
+ dwc->gadget_driver->resume(&dwc->gadget);
+ spin_lock(&dwc->lock);
+ }
+}
+
+static void dwc3_stop_active_transfer(struct dwc3 *dwc, u32 epnum, bool force)
{
struct dwc3_ep *dep;
struct dwc3_gadget_ep_cmd_params params;
@@ -2031,7 +2093,8 @@ static void dwc3_stop_active_transfer(struct dwc3 *dwc, u32 epnum)
*/
cmd = DWC3_DEPCMD_ENDTRANSFER;
- cmd |= DWC3_DEPCMD_HIPRI_FORCERM | DWC3_DEPCMD_CMDIOC;
+ cmd |= force ? DWC3_DEPCMD_HIPRI_FORCERM : 0;
+ cmd |= DWC3_DEPCMD_CMDIOC;
cmd |= DWC3_DEPCMD_PARAM(dep->resource_index);
memset(&params, 0, sizeof(params));
ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, cmd, &params);
@@ -2260,17 +2323,23 @@ static void dwc3_gadget_conndone_interrupt(struct dwc3 *dwc)
reg |= DWC3_DCTL_HIRD_THRES(12);
dwc3_writel(dwc->regs, DWC3_DCTL, reg);
+ } else {
+ reg = dwc3_readl(dwc->regs, DWC3_DCTL);
+ reg &= ~DWC3_DCTL_HIRD_THRES_MASK;
+ dwc3_writel(dwc->regs, DWC3_DCTL, reg);
}
dep = dwc->eps[0];
- ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL, true);
+ ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL, true,
+ false);
if (ret) {
dev_err(dwc->dev, "failed to enable %s\n", dep->name);
return;
}
dep = dwc->eps[1];
- ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL, true);
+ ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL, true,
+ false);
if (ret) {
dev_err(dwc->dev, "failed to enable %s\n", dep->name);
return;
@@ -2378,9 +2447,50 @@ static void dwc3_gadget_linksts_change_interrupt(struct dwc3 *dwc,
dwc->link_state = next;
+ switch (next) {
+ case DWC3_LINK_STATE_U1:
+ if (dwc->speed == USB_SPEED_SUPER)
+ dwc3_suspend_gadget(dwc);
+ break;
+ case DWC3_LINK_STATE_U2:
+ case DWC3_LINK_STATE_U3:
+ dwc3_suspend_gadget(dwc);
+ break;
+ case DWC3_LINK_STATE_RESUME:
+ dwc3_resume_gadget(dwc);
+ break;
+ default:
+ /* do nothing */
+ break;
+ }
+
dev_vdbg(dwc->dev, "%s link %d\n", __func__, dwc->link_state);
}
+static void dwc3_gadget_hibernation_interrupt(struct dwc3 *dwc,
+ unsigned int evtinfo)
+{
+ unsigned int is_ss = evtinfo & BIT(4);
+
+ /**
+ * WORKAROUND: DWC3 revison 2.20a with hibernation support
+ * have a known issue which can cause USB CV TD.9.23 to fail
+ * randomly.
+ *
+ * Because of this issue, core could generate bogus hibernation
+ * events which SW needs to ignore.
+ *
+ * Refers to:
+ *
+ * STAR#9000546576: Device Mode Hibernation: Issue in USB 2.0
+ * Device Fallback from SuperSpeed
+ */
+ if (is_ss ^ (dwc->speed == USB_SPEED_SUPER))
+ return;
+
+ /* enter hibernation here */
+}
+
static void dwc3_gadget_interrupt(struct dwc3 *dwc,
const struct dwc3_event_devt *event)
{
@@ -2397,6 +2507,13 @@ static void dwc3_gadget_interrupt(struct dwc3 *dwc,
case DWC3_DEVICE_EVENT_WAKEUP:
dwc3_gadget_wakeup_interrupt(dwc);
break;
+ case DWC3_DEVICE_EVENT_HIBER_REQ:
+ if (dev_WARN_ONCE(dwc->dev, !dwc->has_hibernation,
+ "unexpected hibernation event\n"))
+ break;
+
+ dwc3_gadget_hibernation_interrupt(dwc, event->event_info);
+ break;
case DWC3_DEVICE_EVENT_LINK_STATUS_CHANGE:
dwc3_gadget_linksts_change_interrupt(dwc, event->event_info);
break;
@@ -2661,8 +2778,10 @@ void dwc3_gadget_exit(struct dwc3 *dwc)
int dwc3_gadget_prepare(struct dwc3 *dwc)
{
- if (dwc->pullups_connected)
+ if (dwc->pullups_connected) {
dwc3_gadget_disable_irq(dwc);
+ dwc3_gadget_run_stop(dwc, true, true);
+ }
return 0;
}
@@ -2671,7 +2790,7 @@ void dwc3_gadget_complete(struct dwc3 *dwc)
{
if (dwc->pullups_connected) {
dwc3_gadget_enable_irq(dwc);
- dwc3_gadget_run_stop(dwc, true);
+ dwc3_gadget_run_stop(dwc, true, false);
}
}
@@ -2694,12 +2813,14 @@ int dwc3_gadget_resume(struct dwc3 *dwc)
dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(512);
dep = dwc->eps[0];
- ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL, false);
+ ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL, false,
+ false);
if (ret)
goto err0;
dep = dwc->eps[1];
- ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL, false);
+ ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL, false,
+ false);
if (ret)
goto err1;
diff --git a/drivers/usb/dwc3/gadget.h b/drivers/usb/dwc3/gadget.h
index febe1aa7b714..a0ee75b68a80 100644
--- a/drivers/usb/dwc3/gadget.h
+++ b/drivers/usb/dwc3/gadget.h
@@ -56,12 +56,6 @@ struct dwc3;
/* DEPXFERCFG parameter 0 */
#define DWC3_DEPXFERCFG_NUM_XFER_RES(n) ((n) & 0xffff)
-struct dwc3_gadget_ep_cmd_params {
- u32 param2;
- u32 param1;
- u32 param0;
-};
-
/* -------------------------------------------------------------------------- */
#define to_dwc3_request(r) (container_of(r, struct dwc3_request, request))
@@ -85,9 +79,6 @@ static inline void dwc3_gadget_move_request_queued(struct dwc3_request *req)
void dwc3_gadget_giveback(struct dwc3_ep *dep, struct dwc3_request *req,
int status);
-int dwc3_gadget_set_test_mode(struct dwc3 *dwc, int mode);
-int dwc3_gadget_set_link_state(struct dwc3 *dwc, enum dwc3_link_state state);
-
void dwc3_ep0_interrupt(struct dwc3 *dwc,
const struct dwc3_event_depevt *event);
void dwc3_ep0_out_start(struct dwc3 *dwc);
@@ -95,9 +86,6 @@ int dwc3_gadget_ep0_set_halt(struct usb_ep *ep, int value);
int dwc3_gadget_ep0_queue(struct usb_ep *ep, struct usb_request *request,
gfp_t gfp_flags);
int __dwc3_gadget_ep_set_halt(struct dwc3_ep *dep, int value);
-int dwc3_send_gadget_ep_cmd(struct dwc3 *dwc, unsigned ep,
- unsigned cmd, struct dwc3_gadget_ep_cmd_params *params);
-int dwc3_send_gadget_generic_command(struct dwc3 *dwc, int cmd, u32 param);
/**
* dwc3_gadget_ep_get_transfer_index - Gets transfer index from HW
generated by cgit v1.2.3 (git 2.0.4) at 2024-07-07 02:01:18 +0000