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usb: dwc3: patches for v3.9 merge window

Browse source 
We're saving some extra memory now by being a lot
 more conservative when allocating our event buffers.
 
 Our default HIRD threshold value was mistakenly set
 as one of the unsupported which would cause undefined
 behavior. Turns out that it broke OMAP5 ES2.0, so we're
 fixing it now by setting the maximum allowed HIRD
 threshold (12).
 
 Quite a few fixes to Isochronous transfers and scatter/gather
 support from Pratyush.
 
 We're also starting to support devicetree-based probe with
 the latest changes from Kishon.
 
 The usual set of cleanups also available: converting debugfs
 regdump utility to regsets, better "compatible" strings for
 Exynos platforms and the removal of the dependency for
 Host and Gadget; now dwc3 can be compiled host-only, device-only,
 and/or Dual-Role.
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Merge tag 'dwc3-for-v3.9' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb into usb-next

Felipe writes:
	usb: dwc3: patches for v3.9 merge window

	We're saving some extra memory now by being a lot
	more conservative when allocating our event buffers.

	Our default HIRD threshold value was mistakenly set
	as one of the unsupported which would cause undefined
	behavior. Turns out that it broke OMAP5 ES2.0, so we're
	fixing it now by setting the maximum allowed HIRD
	threshold (12).

	Quite a few fixes to Isochronous transfers and scatter/gather
	support from Pratyush.

	We're also starting to support devicetree-based probe with
	the latest changes from Kishon.

	The usual set of cleanups also available: converting debugfs
	regdump utility to regsets, better "compatible" strings for
	Exynos platforms and the removal of the dependency for
	Host and Gadget; now dwc3 can be compiled host-only, device-only,
	and/or Dual-Role.
This commit is contained in:
Greg Kroah-Hartman 2013-01-25 09:02:26 -08:00
commit a9b8676c17
10 changed files with 409 additions and 240 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

31
drivers/usb/dwc3/Kconfig
View file

@ -1,6 +1,6 @@
config USB_DWC3
tristate "DesignWare USB3 DRD Core Support"
depends on (USB && USB_GADGET)
depends on (USB || USB_GADGET)
select USB_OTG_UTILS
select USB_XHCI_PLATFORM if USB_SUPPORT && USB_XHCI_HCD
help
@ -12,6 +12,35 @@ config USB_DWC3
if USB_DWC3
choice
bool "DWC3 Mode Selection"
default USB_DWC3_DUAL_ROLE if (USB && USB_GADGET)
default USB_DWC3_HOST if (USB && !USB_GADGET)
default USB_DWC3_GADGET if (!USB && USB_GADGET)
config USB_DWC3_HOST
bool "Host only mode"
depends on USB
help
Select this when you want to use DWC3 in host mode only,
thereby the gadget feature will be regressed.
config USB_DWC3_GADGET
bool "Gadget only mode"
depends on USB_GADGET
help
Select this when you want to use DWC3 in gadget mode only,
thereby the host feature will be regressed.
config USB_DWC3_DUAL_ROLE
bool "Dual Role mode"
depends on (USB && USB_GADGET)
help
This is the default mode of working of DWC3 controller where
both host and gadget features are enabled.
endchoice
config USB_DWC3_DEBUG
bool "Enable Debugging Messages"
help

10
drivers/usb/dwc3/Makefile
View file

@ -4,8 +4,14 @@ ccflags-$(CONFIG_USB_DWC3_VERBOSE) += -DVERBOSE_DEBUG
obj-$(CONFIG_USB_DWC3) += dwc3.o
dwc3-y := core.o
dwc3-y += host.o
dwc3-y += gadget.o ep0.o
ifneq ($(filter y,$(CONFIG_USB_DWC3_HOST) $(CONFIG_USB_DWC3_DUAL_ROLE)),)
dwc3-y += host.o
endif
ifneq ($(filter y,$(CONFIG_USB_DWC3_GADGET) $(CONFIG_USB_DWC3_DUAL_ROLE)),)
dwc3-y += gadget.o ep0.o
endif
ifneq ($(CONFIG_DEBUG_FS),)
dwc3-y += debugfs.o

7
drivers/usb/dwc3/core.c
View file

@ -432,6 +432,9 @@ static int dwc3_probe(struct platform_device *pdev)
return -EPROBE_DEFER;
}
usb_phy_set_suspend(dwc->usb2_phy, 0);
usb_phy_set_suspend(dwc->usb3_phy, 0);
spin_lock_init(&dwc->lock);
platform_set_drvdata(pdev, dwc);
@ -550,9 +553,9 @@ static int dwc3_probe(struct platform_device *pdev)
static int dwc3_remove(struct platform_device *pdev)
{
struct dwc3 *dwc = platform_get_drvdata(pdev);
struct resource *res;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
usb_phy_set_suspend(dwc->usb2_phy, 1);
usb_phy_set_suspend(dwc->usb3_phy, 1);
pm_runtime_put(&pdev->dev);
pm_runtime_disable(&pdev->dev);

22
drivers/usb/dwc3/core.h
View file

@ -55,7 +55,9 @@
#define DWC3_ENDPOINTS_NUM 32
#define DWC3_XHCI_RESOURCES_NUM 2
#define DWC3_EVENT_BUFFERS_SIZE PAGE_SIZE
#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)
#define DWC3_EVENT_TYPE_MASK 0xfe
#define DWC3_EVENT_TYPE_DEV 0
@ -405,7 +407,6 @@ struct dwc3_event_buffer {
* @number: endpoint number (1 - 15)
* @type: set to bmAttributes & USB_ENDPOINT_XFERTYPE_MASK
* @resource_index: Resource transfer index
* @current_uf: Current uf received through last event parameter
* @interval: the intervall on which the ISOC transfer is started
* @name: a human readable name e.g. ep1out-bulk
* @direction: true for TX, false for RX
@ -439,7 +440,6 @@ struct dwc3_ep {
u8 number;
u8 type;
u8 resource_index;
u16 current_uf;
u32 interval;
char name[20];
@ -581,6 +581,7 @@ struct dwc3_request {
struct usb_request request;
struct list_head list;
struct dwc3_ep *dep;
u32 start_slot;
u8 epnum;
struct dwc3_trb *trb;
@ -721,6 +722,7 @@ struct dwc3 {
struct dwc3_hwparams hwparams;
struct dentry *root;
struct debugfs_regset32 *regset;
u8 test_mode;
u8 test_mode_nr;
@ -862,10 +864,24 @@ union dwc3_event {
void dwc3_set_mode(struct dwc3 *dwc, u32 mode);
int dwc3_gadget_resize_tx_fifos(struct dwc3 *dwc);
#if IS_ENABLED(CONFIG_USB_DWC3_HOST) || IS_ENABLED(CONFIG_USB_DWC3_DUAL_ROLE)
int dwc3_host_init(struct dwc3 *dwc);
void dwc3_host_exit(struct dwc3 *dwc);
#else
static inline int dwc3_host_init(struct dwc3 *dwc)
{ return 0; }
static inline void dwc3_host_exit(struct dwc3 *dwc)
{ }
#endif
#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);
#else
static inline int dwc3_gadget_init(struct dwc3 *dwc)
{ return 0; }
static inline void dwc3_gadget_exit(struct dwc3 *dwc)
{ }
#endif
#endif /* __DRIVERS_USB_DWC3_CORE_H */

38
drivers/usb/dwc3/debugfs.c
View file

@ -59,7 +59,7 @@
.offset = DWC3_ ##nm - DWC3_GLOBALS_REGS_START, \
}
static const struct debugfs_reg32 dwc3_regs[] = {
static struct debugfs_reg32 dwc3_regs[] = {
dump_register(GSBUSCFG0),
dump_register(GSBUSCFG1),
dump_register(GTXTHRCFG),
@ -376,27 +376,6 @@ static const struct debugfs_reg32 dwc3_regs[] = {
dump_register(OSTS),
};
static int dwc3_regdump_show(struct seq_file *s, void *unused)
{
struct dwc3 *dwc = s->private;
seq_printf(s, "DesignWare USB3 Core Register Dump\n");
debugfs_print_regs32(s, dwc3_regs, ARRAY_SIZE(dwc3_regs),
dwc->regs, "");
return 0;
}
static int dwc3_regdump_open(struct inode *inode, struct file *file)
{
return single_open(file, dwc3_regdump_show, inode->i_private);
}
static const struct file_operations dwc3_regdump_fops = {
.open = dwc3_regdump_open,
.read = seq_read,
.release = single_release,
};
static int dwc3_mode_show(struct seq_file *s, void *unused)
{
struct dwc3 *dwc = s->private;
@ -666,13 +645,23 @@ int dwc3_debugfs_init(struct dwc3 *dwc)
dwc->root = root;
file = debugfs_create_file("regdump", S_IRUGO, root, dwc,
&dwc3_regdump_fops);
dwc->regset = kzalloc(sizeof(*dwc->regset), GFP_KERNEL);
if (!dwc->regset) {
ret = -ENOMEM;
goto err1;
}
dwc->regset->regs = dwc3_regs;
dwc->regset->nregs = ARRAY_SIZE(dwc3_regs);
dwc->regset->base = dwc->regs;
file = debugfs_create_regset32("regdump", S_IRUGO, root, dwc->regset);
if (!file) {
ret = -ENOMEM;
goto err1;
}
#if IS_ENABLED(CONFIG_USB_DWC3_GADGET)
file = debugfs_create_file("mode", S_IRUGO | S_IWUSR, root,
dwc, &dwc3_mode_fops);
if (!file) {
@ -693,6 +682,7 @@ int dwc3_debugfs_init(struct dwc3 *dwc)
ret = -ENOMEM;
goto err1;
}
#endif
return 0;

63
drivers/usb/dwc3/dwc3-exynos.c
View file

@ -42,7 +42,7 @@ static int dwc3_exynos_register_phys(struct dwc3_exynos *exynos)
memset(&pdata, 0x00, sizeof(pdata));
pdev = platform_device_alloc("nop_usb_xceiv", 0);
pdev = platform_device_alloc("nop_usb_xceiv", PLATFORM_DEVID_AUTO);
if (!pdev)
return -ENOMEM;
@ -53,7 +53,7 @@ static int dwc3_exynos_register_phys(struct dwc3_exynos *exynos)
if (ret)
goto err1;
pdev = platform_device_alloc("nop_usb_xceiv", 1);
pdev = platform_device_alloc("nop_usb_xceiv", PLATFORM_DEVID_AUTO);
if (!pdev) {
ret = -ENOMEM;
goto err1;
@ -95,13 +95,14 @@ static int dwc3_exynos_probe(struct platform_device *pdev)
struct platform_device *dwc3;
struct dwc3_exynos *exynos;
struct clk *clk;
struct device *dev = &pdev->dev;
int ret = -ENOMEM;
exynos = kzalloc(sizeof(*exynos), GFP_KERNEL);
exynos = devm_kzalloc(dev, sizeof(*exynos), GFP_KERNEL);
if (!exynos) {
dev_err(&pdev->dev, "not enough memory\n");
goto err0;
dev_err(dev, "not enough memory\n");
return -ENOMEM;
}
/*
@ -116,30 +117,30 @@ static int dwc3_exynos_probe(struct platform_device *pdev)
ret = dwc3_exynos_register_phys(exynos);
if (ret) {
dev_err(&pdev->dev, "couldn't register PHYs\n");
goto err1;
dev_err(dev, "couldn't register PHYs\n");
return ret;
}
dwc3 = platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO);
if (!dwc3) {
dev_err(&pdev->dev, "couldn't allocate dwc3 device\n");
dev_err(dev, "couldn't allocate dwc3 device\n");
return -ENOMEM;
}
clk = devm_clk_get(dev, "usbdrd30");
if (IS_ERR(clk)) {
dev_err(dev, "couldn't get clock\n");
ret = -EINVAL;
goto err1;
}
clk = clk_get(&pdev->dev, "usbdrd30");
if (IS_ERR(clk)) {
dev_err(&pdev->dev, "couldn't get clock\n");
ret = -EINVAL;
goto err3;
}
dma_set_coherent_mask(&dwc3->dev, dev->coherent_dma_mask);
dma_set_coherent_mask(&dwc3->dev, pdev->dev.coherent_dma_mask);
dwc3->dev.parent = &pdev->dev;
dwc3->dev.dma_mask = pdev->dev.dma_mask;
dwc3->dev.dma_parms = pdev->dev.dma_parms;
dwc3->dev.parent = dev;
dwc3->dev.dma_mask = dev->dma_mask;
dwc3->dev.dma_parms = dev->dma_parms;
exynos->dwc3 = dwc3;
exynos->dev = &pdev->dev;
exynos->dev = dev;
exynos->clk = clk;
clk_enable(exynos->clk);
@ -147,26 +148,23 @@ static int dwc3_exynos_probe(struct platform_device *pdev)
ret = platform_device_add_resources(dwc3, pdev->resource,
pdev->num_resources);
if (ret) {
dev_err(&pdev->dev, "couldn't add resources to dwc3 device\n");
goto err4;
dev_err(dev, "couldn't add resources to dwc3 device\n");
goto err2;
}
ret = platform_device_add(dwc3);
if (ret) {
dev_err(&pdev->dev, "failed to register dwc3 device\n");
goto err4;
dev_err(dev, "failed to register dwc3 device\n");
goto err2;
}
return 0;
err4:
err2:
clk_disable(clk);
clk_put(clk);
err3:
platform_device_put(dwc3);
err1:
kfree(exynos);
err0:
platform_device_put(dwc3);
return ret;
}
@ -179,16 +177,13 @@ static int dwc3_exynos_remove(struct platform_device *pdev)
platform_device_unregister(exynos->usb3_phy);
clk_disable(exynos->clk);
clk_put(exynos->clk);
kfree(exynos);
return 0;
}
#ifdef CONFIG_OF
static const struct of_device_id exynos_dwc3_match[] = {
{ .compatible = "samsung,exynos-dwc3" },
{ .compatible = "samsung,exynos5250-dwusb3" },
{},
};
MODULE_DEVICE_TABLE(of, exynos_dwc3_match);

152
drivers/usb/dwc3/dwc3-omap.c
View file

@ -43,10 +43,13 @@
#include <linux/spinlock.h>
#include <linux/platform_device.h>
#include <linux/platform_data/dwc3-omap.h>
#include <linux/usb/dwc3-omap.h>
#include <linux/pm_runtime.h>
#include <linux/dma-mapping.h>
#include <linux/ioport.h>
#include <linux/io.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/usb/otg.h>
#include <linux/usb/nop-usb-xceiv.h>
@ -78,23 +81,6 @@
/* SYSCONFIG REGISTER */
#define USBOTGSS_SYSCONFIG_DMADISABLE (1 << 16)
#define USBOTGSS_SYSCONFIG_STANDBYMODE(x) ((x) << 4)
#define USBOTGSS_STANDBYMODE_FORCE_STANDBY 0
#define USBOTGSS_STANDBYMODE_NO_STANDBY 1
#define USBOTGSS_STANDBYMODE_SMART_STANDBY 2
#define USBOTGSS_STANDBYMODE_SMART_WAKEUP 3
#define USBOTGSS_STANDBYMODE_MASK (0x03 << 4)
#define USBOTGSS_SYSCONFIG_IDLEMODE(x) ((x) << 2)
#define USBOTGSS_IDLEMODE_FORCE_IDLE 0
#define USBOTGSS_IDLEMODE_NO_IDLE 1
#define USBOTGSS_IDLEMODE_SMART_IDLE 2
#define USBOTGSS_IDLEMODE_SMART_WAKEUP 3
#define USBOTGSS_IDLEMODE_MASK (0x03 << 2)
/* IRQ_EOI REGISTER */
#define USBOTGSS_IRQ_EOI_LINE_NUMBER (1 << 0)
@ -133,7 +119,6 @@ struct dwc3_omap {
/* device lock */
spinlock_t lock;
struct platform_device *dwc3;
struct platform_device *usb2_phy;
struct platform_device *usb3_phy;
struct device *dev;
@ -147,6 +132,8 @@ struct dwc3_omap {
u32 dma_status:1;
};
struct dwc3_omap *_omap;
static inline u32 dwc3_omap_readl(void __iomem *base, u32 offset)
{
return readl(base + offset);
@ -157,6 +144,57 @@ static inline void dwc3_omap_writel(void __iomem *base, u32 offset, u32 value)
writel(value, base + offset);
}
void dwc3_omap_mailbox(enum omap_dwc3_vbus_id_status status)
{
u32 val;
struct dwc3_omap *omap = _omap;
switch (status) {
case OMAP_DWC3_ID_GROUND:
dev_dbg(omap->dev, "ID GND\n");
val = dwc3_omap_readl(omap->base, USBOTGSS_UTMI_OTG_STATUS);
val &= ~(USBOTGSS_UTMI_OTG_STATUS_IDDIG
| USBOTGSS_UTMI_OTG_STATUS_VBUSVALID
| USBOTGSS_UTMI_OTG_STATUS_SESSEND);
val |= USBOTGSS_UTMI_OTG_STATUS_SESSVALID
| USBOTGSS_UTMI_OTG_STATUS_POWERPRESENT;
dwc3_omap_writel(omap->base, USBOTGSS_UTMI_OTG_STATUS, val);
break;
case OMAP_DWC3_VBUS_VALID:
dev_dbg(omap->dev, "VBUS Connect\n");
val = dwc3_omap_readl(omap->base, USBOTGSS_UTMI_OTG_STATUS);
val &= ~USBOTGSS_UTMI_OTG_STATUS_SESSEND;
val |= USBOTGSS_UTMI_OTG_STATUS_IDDIG
| USBOTGSS_UTMI_OTG_STATUS_VBUSVALID
| USBOTGSS_UTMI_OTG_STATUS_SESSVALID
| USBOTGSS_UTMI_OTG_STATUS_POWERPRESENT;
dwc3_omap_writel(omap->base, USBOTGSS_UTMI_OTG_STATUS, val);
break;
case OMAP_DWC3_ID_FLOAT:
case OMAP_DWC3_VBUS_OFF:
dev_dbg(omap->dev, "VBUS Disconnect\n");
val = dwc3_omap_readl(omap->base, USBOTGSS_UTMI_OTG_STATUS);
val &= ~(USBOTGSS_UTMI_OTG_STATUS_SESSVALID
| USBOTGSS_UTMI_OTG_STATUS_VBUSVALID
| USBOTGSS_UTMI_OTG_STATUS_POWERPRESENT);
val |= USBOTGSS_UTMI_OTG_STATUS_SESSEND
| USBOTGSS_UTMI_OTG_STATUS_IDDIG;
dwc3_omap_writel(omap->base, USBOTGSS_UTMI_OTG_STATUS, val);
break;
default:
dev_dbg(omap->dev, "ID float\n");
}
return;
}
EXPORT_SYMBOL_GPL(dwc3_omap_mailbox);
static int dwc3_omap_register_phys(struct dwc3_omap *omap)
{
struct nop_usb_xceiv_platform_data pdata;
@ -165,7 +203,7 @@ static int dwc3_omap_register_phys(struct dwc3_omap *omap)
memset(&pdata, 0x00, sizeof(pdata));
pdev = platform_device_alloc("nop_usb_xceiv", 0);
pdev = platform_device_alloc("nop_usb_xceiv", PLATFORM_DEVID_AUTO);
if (!pdev)
return -ENOMEM;
@ -176,7 +214,7 @@ static int dwc3_omap_register_phys(struct dwc3_omap *omap)
if (ret)
goto err1;
pdev = platform_device_alloc("nop_usb_xceiv", 1);
pdev = platform_device_alloc("nop_usb_xceiv", PLATFORM_DEVID_AUTO);
if (!pdev) {
ret = -ENOMEM;
goto err1;
@ -262,12 +300,20 @@ static irqreturn_t dwc3_omap_interrupt(int irq, void *_omap)
return IRQ_HANDLED;
}
static int dwc3_omap_remove_core(struct device *dev, void *c)
{
struct platform_device *pdev = to_platform_device(dev);
platform_device_unregister(pdev);
return 0;
}
static int dwc3_omap_probe(struct platform_device *pdev)
{
struct dwc3_omap_data *pdata = pdev->dev.platform_data;
struct device_node *node = pdev->dev.of_node;
struct platform_device *dwc3;
struct dwc3_omap *omap;
struct resource *res;
struct device *dev = &pdev->dev;
@ -314,30 +360,32 @@ static int dwc3_omap_probe(struct platform_device *pdev)
return ret;
}
dwc3 = platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO);
if (!dwc3) {
dev_err(dev, "couldn't allocate dwc3 device\n");
return -ENOMEM;
}
context = devm_kzalloc(dev, resource_size(res), GFP_KERNEL);
if (!context) {
dev_err(dev, "couldn't allocate dwc3 context memory\n");
goto err2;
return -ENOMEM;
}
spin_lock_init(&omap->lock);
dma_set_coherent_mask(&dwc3->dev, dev->coherent_dma_mask);
dwc3->dev.parent = dev;
dwc3->dev.dma_mask = dev->dma_mask;
dwc3->dev.dma_parms = dev->dma_parms;
omap->resource_size = resource_size(res);
omap->context = context;
omap->dev = dev;
omap->irq = irq;
omap->base = base;
omap->dwc3 = dwc3;
/*
* REVISIT if we ever have two instances of the wrapper, we will be
* in big trouble
*/
_omap = omap;
pm_runtime_enable(dev);
ret = pm_runtime_get_sync(dev);
if (ret < 0) {
dev_err(dev, "get_sync failed with err %d\n", ret);
return ret;
}
reg = dwc3_omap_readl(omap->base, USBOTGSS_UTMI_OTG_STATUS);
@ -368,21 +416,12 @@ static int dwc3_omap_probe(struct platform_device *pdev)
reg = dwc3_omap_readl(omap->base, USBOTGSS_SYSCONFIG);
omap->dma_status = !!(reg & USBOTGSS_SYSCONFIG_DMADISABLE);
/* Set No-Idle and No-Standby */
reg &= ~(USBOTGSS_STANDBYMODE_MASK
| USBOTGSS_IDLEMODE_MASK);
reg |= (USBOTGSS_SYSCONFIG_STANDBYMODE(USBOTGSS_STANDBYMODE_NO_STANDBY)
| USBOTGSS_SYSCONFIG_IDLEMODE(USBOTGSS_IDLEMODE_NO_IDLE));
dwc3_omap_writel(omap->base, USBOTGSS_SYSCONFIG, reg);
ret = devm_request_irq(dev, omap->irq, dwc3_omap_interrupt, 0,
"dwc3-omap", omap);
if (ret) {
dev_err(dev, "failed to request IRQ #%d --> %d\n",
omap->irq, ret);
goto err2;
return ret;
}
/* enable all IRQs */
@ -401,33 +440,28 @@ static int dwc3_omap_probe(struct platform_device *pdev)
dwc3_omap_writel(omap->base, USBOTGSS_IRQENABLE_SET_1, reg);
ret = platform_device_add_resources(dwc3, pdev->resource,
pdev->num_resources);
if (ret) {
dev_err(dev, "couldn't add resources to dwc3 device\n");
goto err2;
}
ret = platform_device_add(dwc3);
if (ret) {
dev_err(dev, "failed to register dwc3 device\n");
goto err2;
if (node) {
ret = of_platform_populate(node, NULL, NULL, dev);
if (ret) {
dev_err(&pdev->dev,
"failed to add create dwc3 core\n");
return ret;
}
}
return 0;
err2:
platform_device_put(dwc3);
return ret;
}
static int dwc3_omap_remove(struct platform_device *pdev)
{
struct dwc3_omap *omap = platform_get_drvdata(pdev);
platform_device_unregister(omap->dwc3);
platform_device_unregister(omap->usb2_phy);
platform_device_unregister(omap->usb3_phy);
pm_runtime_put_sync(&pdev->dev);
pm_runtime_disable(&pdev->dev);
device_for_each_child(&pdev->dev, NULL, dwc3_omap_remove_core);
return 0;
}

294
drivers/usb/dwc3/gadget.c
View file

@ -241,21 +241,23 @@ void dwc3_gadget_giveback(struct dwc3_ep *dep, struct dwc3_request *req,
int status)
{
struct dwc3 *dwc = dep->dwc;
int i;
if (req->queued) {
if (req->request.num_mapped_sgs)
dep->busy_slot += req->request.num_mapped_sgs;
else
i = 0;
do {
dep->busy_slot++;
/*
* Skip LINK TRB. We can't use req->trb and check for
* DWC3_TRBCTL_LINK_TRB because it points the TRB we just
* completed (not the LINK TRB).
*/
if (((dep->busy_slot & DWC3_TRB_MASK) == DWC3_TRB_NUM - 1) &&
/*
* Skip LINK TRB. We can't use req->trb and check for
* DWC3_TRBCTL_LINK_TRB because it points the TRB we
* just completed (not the LINK TRB).
*/
if (((dep->busy_slot & DWC3_TRB_MASK) ==
DWC3_TRB_NUM- 1) &&
usb_endpoint_xfer_isoc(dep->endpoint.desc))
dep->busy_slot++;
dep->busy_slot++;
} while(++i < req->request.num_mapped_sgs);
req->queued = false;
}
list_del(&req->list);
req->trb = NULL;
@ -749,33 +751,32 @@ static void dwc3_gadget_ep_free_request(struct usb_ep *ep,
*/
static void dwc3_prepare_one_trb(struct dwc3_ep *dep,
struct dwc3_request *req, dma_addr_t dma,
unsigned length, unsigned last, unsigned chain)
unsigned length, unsigned last, unsigned chain, unsigned node)
{
struct dwc3 *dwc = dep->dwc;
struct dwc3_trb *trb;
unsigned int cur_slot;
dev_vdbg(dwc->dev, "%s: req %p dma %08llx length %d%s%s\n",
dep->name, req, (unsigned long long) dma,
length, last ? " last" : "",
chain ? " chain" : "");
trb = &dep->trb_pool[dep->free_slot & DWC3_TRB_MASK];
cur_slot = dep->free_slot;
dep->free_slot++;
/* Skip the LINK-TRB on ISOC */
if (((cur_slot & DWC3_TRB_MASK) == DWC3_TRB_NUM - 1) &&
if (((dep->free_slot & DWC3_TRB_MASK) == DWC3_TRB_NUM - 1) &&
usb_endpoint_xfer_isoc(dep->endpoint.desc))
return;
dep->free_slot++;
trb = &dep->trb_pool[dep->free_slot & DWC3_TRB_MASK];
if (!req->trb) {
dwc3_gadget_move_request_queued(req);
req->trb = trb;
req->trb_dma = dwc3_trb_dma_offset(dep, trb);
req->start_slot = dep->free_slot & DWC3_TRB_MASK;
}
dep->free_slot++;
trb->size = DWC3_TRB_SIZE_LENGTH(length);
trb->bpl = lower_32_bits(dma);
trb->bph = upper_32_bits(dma);
@ -786,9 +787,12 @@ static void dwc3_prepare_one_trb(struct dwc3_ep *dep,
break;
case USB_ENDPOINT_XFER_ISOC:
trb->ctrl = DWC3_TRBCTL_ISOCHRONOUS_FIRST;
if (!node)
trb->ctrl = DWC3_TRBCTL_ISOCHRONOUS_FIRST;
else
trb->ctrl = DWC3_TRBCTL_ISOCHRONOUS;
if (!req->request.no_interrupt)
if (!req->request.no_interrupt && !chain)
trb->ctrl |= DWC3_TRB_CTRL_IOC;
break;
@ -807,14 +811,13 @@ static void dwc3_prepare_one_trb(struct dwc3_ep *dep,
if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) {
trb->ctrl |= DWC3_TRB_CTRL_ISP_IMI;
trb->ctrl |= DWC3_TRB_CTRL_CSP;
} else {
if (chain)
trb->ctrl |= DWC3_TRB_CTRL_CHN;
if (last)
trb->ctrl |= DWC3_TRB_CTRL_LST;
} else if (last) {
trb->ctrl |= DWC3_TRB_CTRL_LST;
}
if (chain)
trb->ctrl |= DWC3_TRB_CTRL_CHN;
if (usb_endpoint_xfer_bulk(dep->endpoint.desc) && dep->stream_capable)
trb->ctrl |= DWC3_TRB_CTRL_SID_SOFN(req->request.stream_id);
@ -885,6 +888,7 @@ static void dwc3_prepare_trbs(struct dwc3_ep *dep, bool starting)
list_for_each_entry_safe(req, n, &dep->request_list, list) {
unsigned length;
dma_addr_t dma;
last_one = false;
if (req->request.num_mapped_sgs > 0) {
struct usb_request *request = &req->request;
@ -900,7 +904,9 @@ static void dwc3_prepare_trbs(struct dwc3_ep *dep, bool starting)
if (i == (request->num_mapped_sgs - 1) ||
sg_is_last(s)) {
last_one = true;
if (list_is_last(&req->list,
&dep->request_list))
last_one = true;
chain = false;
}
@ -912,7 +918,7 @@ static void dwc3_prepare_trbs(struct dwc3_ep *dep, bool starting)
chain = false;
dwc3_prepare_one_trb(dep, req, dma, length,
last_one, chain);
last_one, chain, i);
if (last_one)
break;
@ -930,7 +936,7 @@ static void dwc3_prepare_trbs(struct dwc3_ep *dep, bool starting)
last_one = 1;
dwc3_prepare_one_trb(dep, req, dma, length,
last_one, false);
last_one, false, 0);
if (last_one)
break;
@ -977,13 +983,14 @@ static int __dwc3_gadget_kick_transfer(struct dwc3_ep *dep, u16 cmd_param,
}
memset(&params, 0, sizeof(params));
params.param0 = upper_32_bits(req->trb_dma);
params.param1 = lower_32_bits(req->trb_dma);
if (start_new)
if (start_new) {
params.param0 = upper_32_bits(req->trb_dma);
params.param1 = lower_32_bits(req->trb_dma);
cmd = DWC3_DEPCMD_STARTTRANSFER;
else
} else {
cmd = DWC3_DEPCMD_UPDATETRANSFER;
}
cmd |= DWC3_DEPCMD_PARAM(cmd_param);
ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, cmd, &params);
@ -1082,8 +1089,6 @@ static int __dwc3_gadget_ep_queue(struct dwc3_ep *dep, struct dwc3_request *req)
*
*/
if (dep->flags & DWC3_EP_PENDING_REQUEST) {
int ret;
/*
* If xfernotready is already elapsed and it is a case
* of isoc transfer, then issue END TRANSFER, so that
@ -1091,7 +1096,10 @@ static int __dwc3_gadget_ep_queue(struct dwc3_ep *dep, struct dwc3_request *req)
* notion of current microframe.
*/
if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) {
dwc3_stop_active_transfer(dwc, dep->number);
if (list_empty(&dep->req_queued)) {
dwc3_stop_active_transfer(dwc, dep->number);
dep->flags = DWC3_EP_ENABLED;
}
return 0;
}
@ -1099,6 +1107,7 @@ static int __dwc3_gadget_ep_queue(struct dwc3_ep *dep, struct dwc3_request *req)
if (ret && ret != -EBUSY)
dev_dbg(dwc->dev, "%s: failed to kick transfers\n",
dep->name);
return ret;
}
/*
@ -1115,16 +1124,7 @@ static int __dwc3_gadget_ep_queue(struct dwc3_ep *dep, struct dwc3_request *req)
if (ret && ret != -EBUSY)
dev_dbg(dwc->dev, "%s: failed to kick transfers\n",
dep->name);
}
/*
* 3. Missed ISOC Handling. We need to start isoc transfer on the saved
* uframe number.
*/
if (usb_endpoint_xfer_isoc(dep->endpoint.desc) &&
(dep->flags & DWC3_EP_MISSED_ISOC)) {
__dwc3_gadget_start_isoc(dwc, dep, dep->current_uf);
dep->flags &= ~DWC3_EP_MISSED_ISOC;
return ret;
}
return 0;
@ -1651,14 +1651,90 @@ static void dwc3_gadget_release(struct device *dev)
}
/* -------------------------------------------------------------------------- */
static int __dwc3_cleanup_done_trbs(struct dwc3 *dwc, struct dwc3_ep *dep,
struct dwc3_request *req, struct dwc3_trb *trb,
const struct dwc3_event_depevt *event, int status)
{
unsigned int count;
unsigned int s_pkt = 0;
unsigned int trb_status;
if ((trb->ctrl & DWC3_TRB_CTRL_HWO) && status != -ESHUTDOWN)
/*
* We continue despite the error. There is not much we
* can do. If we don't clean it up we loop forever. If
* we skip the TRB then it gets overwritten after a
* while since we use them in a ring buffer. A BUG()
* would help. Lets hope that if this occurs, someone
* fixes the root cause instead of looking away :)
*/
dev_err(dwc->dev, "%s's TRB (%p) still owned by HW\n",
dep->name, trb);
count = trb->size & DWC3_TRB_SIZE_MASK;
if (dep->direction) {
if (count) {
trb_status = DWC3_TRB_SIZE_TRBSTS(trb->size);
if (trb_status == DWC3_TRBSTS_MISSED_ISOC) {
dev_dbg(dwc->dev, "incomplete IN transfer %s\n",
dep->name);
/*
* If missed isoc occurred and there is
* no request queued then issue END
* TRANSFER, so that core generates
* next xfernotready and we will issue
* a fresh START TRANSFER.
* If there are still queued request
* then wait, do not issue either END
* or UPDATE TRANSFER, just attach next
* request in request_list during
* giveback.If any future queued request
* is successfully transferred then we
* will issue UPDATE TRANSFER for all
* request in the request_list.
*/
dep->flags |= DWC3_EP_MISSED_ISOC;
} else {
dev_err(dwc->dev, "incomplete IN transfer %s\n",
dep->name);
status = -ECONNRESET;
}
} else {
dep->flags &= ~DWC3_EP_MISSED_ISOC;
}
} else {
if (count && (event->status & DEPEVT_STATUS_SHORT))
s_pkt = 1;
}
/*
* We assume here we will always receive the entire data block
* which we should receive. Meaning, if we program RX to
* receive 4K but we receive only 2K, we assume that's all we
* should receive and we simply bounce the request back to the
* gadget driver for further processing.
*/
req->request.actual += req->request.length - count;
if (s_pkt)
return 1;
if ((event->status & DEPEVT_STATUS_LST) &&
(trb->ctrl & (DWC3_TRB_CTRL_LST |
DWC3_TRB_CTRL_HWO)))
return 1;
if ((event->status & DEPEVT_STATUS_IOC) &&
(trb->ctrl & DWC3_TRB_CTRL_IOC))
return 1;
return 0;
}
static int dwc3_cleanup_done_reqs(struct dwc3 *dwc, struct dwc3_ep *dep,
const struct dwc3_event_depevt *event, int status)
{
struct dwc3_request *req;
struct dwc3_trb *trb;
unsigned int count;
unsigned int s_pkt = 0;
unsigned int trb_status;
unsigned int slot;
unsigned int i;
int ret;
do {
req = next_request(&dep->req_queued);
@ -1666,62 +1742,44 @@ static int dwc3_cleanup_done_reqs(struct dwc3 *dwc, struct dwc3_ep *dep,
WARN_ON_ONCE(1);
return 1;
}
i = 0;
do {
slot = req->start_slot + i;
if ((slot == DWC3_TRB_NUM - 1) &&
usb_endpoint_xfer_isoc(dep->endpoint.desc))
slot++;
slot %= DWC3_TRB_NUM;
trb = &dep->trb_pool[slot];
trb = req->trb;
ret = __dwc3_cleanup_done_trbs(dwc, dep, req, trb,
event, status);
if (ret)
break;
}while (++i < req->request.num_mapped_sgs);
if ((trb->ctrl & DWC3_TRB_CTRL_HWO) && status != -ESHUTDOWN)
/*
* We continue despite the error. There is not much we
* can do. If we don't clean it up we loop forever. If
* we skip the TRB then it gets overwritten after a
* while since we use them in a ring buffer. A BUG()
* would help. Lets hope that if this occurs, someone
* fixes the root cause instead of looking away :)
*/
dev_err(dwc->dev, "%s's TRB (%p) still owned by HW\n",
dep->name, req->trb);
count = trb->size & DWC3_TRB_SIZE_MASK;
if (dep->direction) {
if (count) {
trb_status = DWC3_TRB_SIZE_TRBSTS(trb->size);
if (trb_status == DWC3_TRBSTS_MISSED_ISOC) {
dev_dbg(dwc->dev, "incomplete IN transfer %s\n",
dep->name);
dep->current_uf = event->parameters &
~(dep->interval - 1);
dep->flags |= DWC3_EP_MISSED_ISOC;
} else {
dev_err(dwc->dev, "incomplete IN transfer %s\n",
dep->name);
status = -ECONNRESET;
}
}
} else {
if (count && (event->status & DEPEVT_STATUS_SHORT))
s_pkt = 1;
}
/*
* We assume here we will always receive the entire data block
* which we should receive. Meaning, if we program RX to
* receive 4K but we receive only 2K, we assume that's all we
* should receive and we simply bounce the request back to the
* gadget driver for further processing.
*/
req->request.actual += req->request.length - count;
dwc3_gadget_giveback(dep, req, status);
if (s_pkt)
break;
if ((event->status & DEPEVT_STATUS_LST) &&
(trb->ctrl & (DWC3_TRB_CTRL_LST |
DWC3_TRB_CTRL_HWO)))
break;
if ((event->status & DEPEVT_STATUS_IOC) &&
(trb->ctrl & DWC3_TRB_CTRL_IOC))
if (ret)
break;
} while (1);
if (usb_endpoint_xfer_isoc(dep->endpoint.desc) &&
list_empty(&dep->req_queued)) {
if (list_empty(&dep->request_list)) {
/*
* If there is no entry in request list then do
* not issue END TRANSFER now. Just set PENDING
* flag, so that END TRANSFER is issued when an
* entry is added into request list.
*/
dep->flags = DWC3_EP_PENDING_REQUEST;
} else {
dwc3_stop_active_transfer(dwc, dep->number);
dep->flags = DWC3_EP_ENABLED;
}
return 1;
}
if ((event->status & DEPEVT_STATUS_IOC) &&
(trb->ctrl & DWC3_TRB_CTRL_IOC))
return 0;
@ -2156,6 +2214,26 @@ static void dwc3_gadget_conndone_interrupt(struct dwc3 *dwc)
break;
}
/* Enable USB2 LPM Capability */
if ((dwc->revision > DWC3_REVISION_194A)
&& (speed != DWC3_DCFG_SUPERSPEED)) {
reg = dwc3_readl(dwc->regs, DWC3_DCFG);
reg |= DWC3_DCFG_LPM_CAP;
dwc3_writel(dwc->regs, DWC3_DCFG, reg);
reg = dwc3_readl(dwc->regs, DWC3_DCTL);
reg &= ~(DWC3_DCTL_HIRD_THRES_MASK | DWC3_DCTL_L1_HIBER_EN);
/*
* TODO: This should be configurable. For now using
* maximum allowed HIRD threshold value of 0b1100
*/
reg |= DWC3_DCTL_HIRD_THRES(12);
dwc3_writel(dwc->regs, DWC3_DCTL, reg);
}
/* Recent versions support automatic phy suspend and don't need this */
if (dwc->revision < DWC3_REVISION_194A) {
/* Suspend unneeded PHY */
@ -2462,20 +2540,8 @@ int dwc3_gadget_init(struct dwc3 *dwc)
DWC3_DEVTEN_DISCONNEVTEN);
dwc3_writel(dwc->regs, DWC3_DEVTEN, reg);
/* Enable USB2 LPM and automatic phy suspend only on recent versions */
/* automatic phy suspend only on recent versions */
if (dwc->revision >= DWC3_REVISION_194A) {
reg = dwc3_readl(dwc->regs, DWC3_DCFG);
reg |= DWC3_DCFG_LPM_CAP;
dwc3_writel(dwc->regs, DWC3_DCFG, reg);
reg = dwc3_readl(dwc->regs, DWC3_DCTL);
reg &= ~(DWC3_DCTL_HIRD_THRES_MASK | DWC3_DCTL_L1_HIBER_EN);
/* TODO: This should be configurable */
reg |= DWC3_DCTL_HIRD_THRES(28);
dwc3_writel(dwc->regs, DWC3_DCTL, reg);
dwc3_gadget_usb2_phy_suspend(dwc, false);
dwc3_gadget_usb3_phy_suspend(dwc, false);
}

2
drivers/usb/dwc3/host.c
View file

@ -44,7 +44,7 @@ int dwc3_host_init(struct dwc3 *dwc)
struct platform_device *xhci;
int ret;
xhci = platform_device_alloc("xhci-hcd", -1);
xhci = platform_device_alloc("xhci-hcd", PLATFORM_DEVID_AUTO);
if (!xhci) {
dev_err(dwc->dev, "couldn't allocate xHCI device\n");
ret = -ENOMEM;

30
include/linux/usb/dwc3-omap.h Normal file
View file

@ -0,0 +1,30 @@
/*
* Copyright (C) 2013 by Texas Instruments
*
* The Inventra Controller Driver for Linux is free software; you
* can redistribute it and/or modify it under the terms of the GNU
* General Public License version 2 as published by the Free Software
* Foundation.
*/
#ifndef __DWC3_OMAP_H__
#define __DWC3_OMAP_H__
enum omap_dwc3_vbus_id_status {
OMAP_DWC3_UNKNOWN = 0,
OMAP_DWC3_ID_GROUND,
OMAP_DWC3_ID_FLOAT,
OMAP_DWC3_VBUS_VALID,
OMAP_DWC3_VBUS_OFF,
};
#if (defined(CONFIG_USB_DWC3) || defined(CONFIG_USB_DWC3_MODULE))
extern void dwc3_omap_mailbox(enum omap_dwc3_vbus_id_status status);
#else
static inline void dwc3_omap_mailbox(enum omap_dwc3_vbus_id_status status)
{
return;
}
#endif
#endif /* __DWC3_OMAP_H__ */