Add support for otg for all freescale socs having internal
usb phy.
Ramneek Mehresh (7):
usb:fsl:otg: Make fsl otg driver as tristate
usb:fsl:otg: Add controller version based ULPI and UTMI phy
usb:fsl:otg: Add support to add/remove usb host driver
usb:fsl:otg: Signal host drv when host is otg
usb:fsl:otg: Modify otg_event to start host drv
usb:fsl:otg: Combine host/gadget start/resume for ID change
usb:fsl:otg: Add host-gadget drv sync delay
drivers/usb/host/ehci-fsl.c | 73 +++++++++++++++++++++++++++++++------------
drivers/usb/host/ehci-fsl.h | 16 ++++++++++
drivers/usb/phy/Kconfig | 2 +-
drivers/usb/phy/phy-fsl-usb.c | 58 +++++++++++++++++++++++++---------
drivers/usb/phy/phy-fsl-usb.h | 7 +++++
include/linux/usb.h | 1 +
6 files changed, 122 insertions(+), 35 deletions(-)
--
Changes for v4:
- corrected reference to struct usb_bus inside
ehci_fsl_drv_resume() and ehci_fsl_drv_suspend().
Took pointer instead of structure.
- removed CONFIG_PM from inside struct ehci_fsl
in ehci-fsl.h
- added code to remove host drv upon otg init
by making have_hcd = 1 in probe() from patch 7/8 of
patch-set[v3] to 3/7 in patch-set[v4]
1.8.3.1
Provide option to load fsl otg driver as loadable module.
Signed-off-by: Ramneek Mehresh <[email protected]>
---
drivers/usb/phy/Kconfig | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/usb/phy/Kconfig b/drivers/usb/phy/Kconfig
index 22e8ecb..b6de4a7 100644
--- a/drivers/usb/phy/Kconfig
+++ b/drivers/usb/phy/Kconfig
@@ -19,7 +19,7 @@ config AB8500_USB
in host mode, low speed.
config FSL_USB2_OTG
- bool "Freescale USB OTG Transceiver Driver"
+ tristate "Freescale USB OTG Transceiver Driver"
depends on USB_EHCI_FSL && USB_FSL_USB2 && USB_OTG_FSM && PM
select USB_PHY
help
--
1.8.3.1
Add controller version based ULPI and UTMI phy
initialization for otg driver.
Signed-off-by: Shengzhou Liu <[email protected]>
Signed-off-by: Ramneek Mehresh <[email protected]>
Reviewed-by: Fleming Andrew-AFLEMING <[email protected]>
Tested-by: Fleming Andrew-AFLEMING <[email protected]>
---
drivers/usb/phy/phy-fsl-usb.c | 20 ++++++++++++++++++++
drivers/usb/phy/phy-fsl-usb.h | 7 +++++++
2 files changed, 27 insertions(+)
diff --git a/drivers/usb/phy/phy-fsl-usb.c b/drivers/usb/phy/phy-fsl-usb.c
index 94eb292..4e58aee 100644
--- a/drivers/usb/phy/phy-fsl-usb.c
+++ b/drivers/usb/phy/phy-fsl-usb.c
@@ -923,12 +923,32 @@ int usb_otg_start(struct platform_device *pdev)
temp &= ~(PORTSC_PHY_TYPE_SEL | PORTSC_PTW);
switch (pdata->phy_mode) {
case FSL_USB2_PHY_ULPI:
+ if (pdata->controller_ver) {
+ /* controller version 1.6 or above */
+ setbits32(&p_otg->dr_mem_map->control,
+ USB_CTRL_ULPI_PHY_CLK_SEL);
+ /*
+ * Due to controller issue of PHY_CLK_VALID in ULPI
+ * mode, set USB_CTRL_USB_EN before checking
+ * PHY_CLK_VALID, otherwise PHY_CLK_VALID doesn't work
+ */
+ clrsetbits_be32(&p_otg->dr_mem_map->control,
+ USB_CTRL_UTMI_PHY_EN, USB_CTRL_IOENB);
+ }
temp |= PORTSC_PTS_ULPI;
break;
case FSL_USB2_PHY_UTMI_WIDE:
temp |= PORTSC_PTW_16BIT;
/* fall through */
case FSL_USB2_PHY_UTMI:
+ if (pdata->controller_ver) {
+ /* controller version 1.6 or above */
+ setbits32(&p_otg->dr_mem_map->control,
+ USB_CTRL_UTMI_PHY_EN);
+ /* Delay for UTMI PHY CLK to become stable - 10ms */
+ mdelay(FSL_UTMI_PHY_DLY);
+ }
+ setbits32(&p_otg->dr_mem_map->control, USB_CTRL_UTMI_PHY_EN);
temp |= PORTSC_PTS_UTMI;
/* fall through */
default:
diff --git a/drivers/usb/phy/phy-fsl-usb.h b/drivers/usb/phy/phy-fsl-usb.h
index 2314995..4a78fb3 100644
--- a/drivers/usb/phy/phy-fsl-usb.h
+++ b/drivers/usb/phy/phy-fsl-usb.h
@@ -199,6 +199,13 @@
/* control Register Bit Masks */
#define USB_CTRL_IOENB (0x1<<2)
#define USB_CTRL_ULPI_INT0EN (0x1<<0)
+#define USB_CTRL_WU_INT_EN (0x1<<1)
+#define USB_CTRL_LINE_STATE_FILTER__EN (0x1<<3)
+#define USB_CTRL_KEEP_OTG_ON (0x1<<4)
+#define USB_CTRL_OTG_PORT (0x1<<5)
+#define USB_CTRL_PLL_RESET (0x1<<8)
+#define USB_CTRL_UTMI_PHY_EN (0x1<<9)
+#define USB_CTRL_ULPI_PHY_CLK_SEL (0x1<<10)
/* BCSR5 */
#define BCSR5_INT_USB (0x02)
--
1.8.3.1
Add workqueue to add/remove host driver (outside
interrupt context) upon each id change, and to
remove host driver upon otg initialization by changing
have_hcd variable.
Signed-off-by: Li Yang <[email protected]>
Signed-off-by: Ramneek Mehresh <[email protected]>
Reviewed-by: Alan Stern <[email protected]>
---
drivers/usb/host/ehci-fsl.c | 73 ++++++++++++++++++++++++++++++++-------------
drivers/usb/host/ehci-fsl.h | 16 ++++++++++
2 files changed, 69 insertions(+), 20 deletions(-)
diff --git a/drivers/usb/host/ehci-fsl.c b/drivers/usb/host/ehci-fsl.c
index 3b6eb21..a01860d 100644
--- a/drivers/usb/host/ehci-fsl.c
+++ b/drivers/usb/host/ehci-fsl.c
@@ -44,6 +44,31 @@
static struct hc_driver __read_mostly fsl_ehci_hc_driver;
+static struct ehci_fsl *hcd_to_ehci_fsl(struct usb_hcd *hcd)
+{
+ return (struct ehci_fsl *)hcd_to_ehci(hcd)->priv;
+}
+
+static void do_change_hcd(struct work_struct *work)
+{
+ struct ehci_fsl *ehci_fsl = container_of(work, struct ehci_fsl,
+ change_hcd_work);
+ struct usb_hcd *hcd = ehci_fsl->hcd;
+ void __iomem *non_ehci = hcd->regs;
+ int retval;
+
+ if (ehci_fsl->hcd_add && !ehci_fsl->have_hcd) {
+ writel(USBMODE_CM_HOST, non_ehci + FSL_SOC_USB_USBMODE);
+ /* host, gadget and otg share same int line */
+ retval = usb_add_hcd(hcd, hcd->irq, IRQF_SHARED);
+ if (retval == 0)
+ ehci_fsl->have_hcd = 1;
+ } else if (!ehci_fsl->hcd_add && ehci_fsl->have_hcd) {
+ usb_remove_hcd(hcd);
+ ehci_fsl->have_hcd = 0;
+ }
+}
+
/* configure so an HC device and id are always provided */
/* always called with process context; sleeping is OK */
@@ -147,11 +172,15 @@ static int fsl_ehci_drv_probe(struct platform_device *pdev)
goto err2;
device_wakeup_enable(hcd->self.controller);
-#ifdef CONFIG_USB_OTG
if (pdata->operating_mode == FSL_USB2_DR_OTG) {
struct ehci_hcd *ehci = hcd_to_ehci(hcd);
+ struct ehci_fsl *ehci_fsl = hcd_to_ehci_fsl(hcd);
+ ehci_fsl->hcd = hcd;
hcd->usb_phy = usb_get_phy(USB_PHY_TYPE_USB2);
+
+ INIT_WORK(&ehci_fsl->change_hcd_work, do_change_hcd);
+
dev_dbg(&pdev->dev, "hcd=0x%p ehci=0x%p, phy=0x%p\n",
hcd, ehci, hcd->usb_phy);
@@ -167,8 +196,10 @@ static int fsl_ehci_drv_probe(struct platform_device *pdev)
retval = -ENODEV;
goto err2;
}
+
+ ehci_fsl->have_hcd = 1;
}
-#endif
+
return retval;
err2:
@@ -375,15 +406,6 @@ static int ehci_fsl_setup(struct usb_hcd *hcd)
return retval;
}
-struct ehci_fsl {
- struct ehci_hcd ehci;
-
-#ifdef CONFIG_PM
- /* Saved USB PHY settings, need to restore after deep sleep. */
- u32 usb_ctrl;
-#endif
-};
-
#ifdef CONFIG_PM
#ifdef CONFIG_PPC_MPC512x
@@ -531,24 +553,26 @@ static inline int ehci_fsl_mpc512x_drv_resume(struct device *dev)
}
#endif /* CONFIG_PPC_MPC512x */
-static struct ehci_fsl *hcd_to_ehci_fsl(struct usb_hcd *hcd)
-{
- struct ehci_hcd *ehci = hcd_to_ehci(hcd);
-
- return container_of(ehci, struct ehci_fsl, ehci);
-}
-
static int ehci_fsl_drv_suspend(struct device *dev)
{
struct usb_hcd *hcd = dev_get_drvdata(dev);
- struct ehci_fsl *ehci_fsl = hcd_to_ehci_fsl(hcd);
void __iomem *non_ehci = hcd->regs;
+ struct ehci_fsl *ehci_fsl = hcd_to_ehci_fsl(hcd);
+ struct usb_bus *host = &hcd->self;
if (of_device_is_compatible(dev->parent->of_node,
"fsl,mpc5121-usb2-dr")) {
return ehci_fsl_mpc512x_drv_suspend(dev);
}
+ if (host->is_otg) {
+ /* remove hcd */
+ ehci_fsl->hcd_add = 0;
+ schedule_work(&ehci_fsl->change_hcd_work);
+ host->is_otg = 0;
+ return 0;
+ }
+
ehci_prepare_ports_for_controller_suspend(hcd_to_ehci(hcd),
device_may_wakeup(dev));
if (!fsl_deep_sleep())
@@ -561,15 +585,24 @@ static int ehci_fsl_drv_suspend(struct device *dev)
static int ehci_fsl_drv_resume(struct device *dev)
{
struct usb_hcd *hcd = dev_get_drvdata(dev);
- struct ehci_fsl *ehci_fsl = hcd_to_ehci_fsl(hcd);
struct ehci_hcd *ehci = hcd_to_ehci(hcd);
void __iomem *non_ehci = hcd->regs;
+ struct ehci_fsl *ehci_fsl = hcd_to_ehci_fsl(hcd);
+ struct usb_bus *host = &hcd->self;
if (of_device_is_compatible(dev->parent->of_node,
"fsl,mpc5121-usb2-dr")) {
return ehci_fsl_mpc512x_drv_resume(dev);
}
+ if (host->is_otg) {
+ /* add hcd */
+ ehci_fsl->hcd_add = 1;
+ schedule_work(&ehci_fsl->change_hcd_work);
+ host->is_otg = 0;
+ return 0;
+ }
+
ehci_prepare_ports_for_controller_resume(ehci);
if (!fsl_deep_sleep())
return 0;
diff --git a/drivers/usb/host/ehci-fsl.h b/drivers/usb/host/ehci-fsl.h
index 1a8a60a..64538eb 100644
--- a/drivers/usb/host/ehci-fsl.h
+++ b/drivers/usb/host/ehci-fsl.h
@@ -63,4 +63,20 @@
#define UTMI_PHY_EN (1<<9)
#define ULPI_PHY_CLK_SEL (1<<10)
#define PHY_CLK_VALID (1<<17)
+
+struct ehci_fsl {
+ /* Save USB CTRL, need to restore after deep sleep. */
+ u32 usb_ctrl;
+ struct usb_hcd *hcd;
+ struct work_struct change_hcd_work;
+ /*
+ * store current hcd state for otg;
+ * have_hcd is true when host drv al already part of otg framework,
+ * otherwise false;
+ * hcd_add is true when otg framework wants to add host
+ * drv as part of otg;flase when it wants to remove it
+ */
+ unsigned have_hcd:1;
+ unsigned hcd_add:1;
+};
#endif /* _EHCI_FSL_H */
--
1.8.3.1
Set is_otg boolean flag to signal host driver when host
is running in context of otg host suspend/resume.
Signed-off-by: Ramneek Mehresh <[email protected]>
---
drivers/usb/phy/phy-fsl-usb.c | 7 ++++++-
include/linux/usb.h | 1 +
2 files changed, 7 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/phy/phy-fsl-usb.c b/drivers/usb/phy/phy-fsl-usb.c
index 4e58aee..815c22c 100644
--- a/drivers/usb/phy/phy-fsl-usb.c
+++ b/drivers/usb/phy/phy-fsl-usb.c
@@ -463,6 +463,7 @@ void otg_reset_controller(void)
int fsl_otg_start_host(struct otg_fsm *fsm, int on)
{
struct usb_otg *otg = fsm->otg;
+ struct usb_bus *host = otg->host;
struct device *dev;
struct fsl_otg *otg_dev =
container_of(otg->usb_phy, struct fsl_otg, phy);
@@ -485,6 +486,7 @@ int fsl_otg_start_host(struct otg_fsm *fsm, int on)
else {
otg_reset_controller();
VDBG("host on......\n");
+ host->is_otg = 1;
if (dev->driver->pm && dev->driver->pm->resume) {
retval = dev->driver->pm->resume(dev);
if (fsm->id) {
@@ -510,8 +512,11 @@ int fsl_otg_start_host(struct otg_fsm *fsm, int on)
else {
VDBG("host off......\n");
if (dev && dev->driver) {
- if (dev->driver->pm && dev->driver->pm->suspend)
+ if (dev->driver->pm &&
+ dev->driver->pm->suspend) {
+ host->is_otg = 1;
retval = dev->driver->pm->suspend(dev);
+ }
if (fsm->id)
/* default-b */
fsl_otg_drv_vbus(fsm, 0);
diff --git a/include/linux/usb.h b/include/linux/usb.h
index 89533ba..b7eb033 100644
--- a/include/linux/usb.h
+++ b/include/linux/usb.h
@@ -359,6 +359,7 @@ struct usb_bus {
* for control transfers?
*/
u8 otg_port; /* 0, or number of OTG/HNP port */
+ unsigned is_otg:1; /* true when host is also otg */
unsigned is_b_host:1; /* true during some HNP roleswitches */
unsigned b_hnp_enable:1; /* OTG: did A-Host enable HNP? */
unsigned no_stop_on_short:1; /*
--
1.8.3.1
Add mechanism to start host driver from inside fsl_otg_even upon
each id change interrupt.
Signed-off-by: Ramneek Mehresh <[email protected]>
Reviewed-by: Fleming Andrew-AFLEMING <[email protected]>
Tested-by: Fleming Andrew-AFLEMING <[email protected]>
---
drivers/usb/phy/phy-fsl-usb.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/usb/phy/phy-fsl-usb.c b/drivers/usb/phy/phy-fsl-usb.c
index 815c22c..3b8a9e5 100644
--- a/drivers/usb/phy/phy-fsl-usb.c
+++ b/drivers/usb/phy/phy-fsl-usb.c
@@ -677,6 +677,10 @@ static void fsl_otg_event(struct work_struct *work)
fsl_otg_start_host(fsm, 0);
otg_drv_vbus(fsm, 0);
fsl_otg_start_gadget(fsm, 1);
+ } else {
+ fsl_otg_start_gadget(fsm, 0);
+ otg_drv_vbus(fsm, 1);
+ fsl_otg_start_host(fsm, 1);
}
}
--
1.8.3.1
Make call to fsl_otg_event for each id change even.
Signed-off-by: Ramneek Mehresh <[email protected]>
Reviewed-by: Fleming Andrew-AFLEMING <[email protected]>
Tested-by: Fleming Andrew-AFLEMING <[email protected]>
---
drivers/usb/phy/phy-fsl-usb.c | 15 +++------------
1 file changed, 3 insertions(+), 12 deletions(-)
diff --git a/drivers/usb/phy/phy-fsl-usb.c b/drivers/usb/phy/phy-fsl-usb.c
index 3b8a9e5..689516d 100644
--- a/drivers/usb/phy/phy-fsl-usb.c
+++ b/drivers/usb/phy/phy-fsl-usb.c
@@ -733,6 +733,7 @@ irqreturn_t fsl_otg_isr(int irq, void *dev_id)
{
struct otg_fsm *fsm = &((struct fsl_otg *)dev_id)->fsm;
struct usb_otg *otg = ((struct fsl_otg *)dev_id)->phy.otg;
+ struct fsl_otg *otg_dev = dev_id;
u32 otg_int_src, otg_sc;
otg_sc = fsl_readl(&usb_dr_regs->otgsc);
@@ -762,18 +763,8 @@ irqreturn_t fsl_otg_isr(int irq, void *dev_id)
otg->gadget->is_a_peripheral = !fsm->id;
VDBG("ID int (ID is %d)\n", fsm->id);
- if (fsm->id) { /* switch to gadget */
- schedule_delayed_work(
- &((struct fsl_otg *)dev_id)->otg_event,
- 100);
- } else { /* switch to host */
- cancel_delayed_work(&
- ((struct fsl_otg *)dev_id)->
- otg_event);
- fsl_otg_start_gadget(fsm, 0);
- otg_drv_vbus(fsm, 1);
- fsl_otg_start_host(fsm, 1);
- }
+ schedule_delayed_work(&otg_dev->otg_event, 100);
+
return IRQ_HANDLED;
}
}
--
1.8.3.1
Resolve synchronization issue between host
and gadget drivers upon role-reversal.
Signed-off-by: Ramneek Mehresh <[email protected]>
Reviewed-by: Li Yang-R58472 <[email protected]>
Reviewed-by: Fleming Andrew-AFLEMING <[email protected]>
Tested-by: Fleming Andrew-AFLEMING <[email protected]>
---
drivers/usb/phy/phy-fsl-usb.c | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/phy/phy-fsl-usb.c b/drivers/usb/phy/phy-fsl-usb.c
index 689516d..5d678ea 100644
--- a/drivers/usb/phy/phy-fsl-usb.c
+++ b/drivers/usb/phy/phy-fsl-usb.c
@@ -544,8 +544,18 @@ int fsl_otg_start_gadget(struct otg_fsm *fsm, int on)
dev = otg->gadget->dev.parent;
if (on) {
- if (dev->driver->resume)
+ /*
+ * Delay gadget resume to synchronize between host and gadget
+ * drivers. Upon role-reversal host drv is shutdown by kernel
+ * worker thread. By the time host drv shuts down, controller
+ * gets programmed for gadget role. Shutting host drv after
+ * this results in controller getting reset, and it stops
+ * responding to otg events
+ */
+ if (dev->driver->resume) {
+ msleep(1000);
dev->driver->resume(dev);
+ }
} else {
if (dev->driver->suspend)
dev->driver->suspend(dev, otg_suspend_state);
--
1.8.3.1
[if your patch is applied to the wrong git tree, please drop us a note to help improving the system]
Hi Ramneek,
[auto build test ERROR on balbi-usb/next]
[also build test ERROR on v4.4-rc6 next-20151223]
url: https://github.com/0day-ci/linux/commits/Ramneek-Mehresh/Add-OTG-support-for-FSL-socs/20151224-192624
base: https://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb.git next
config: powerpc-mpc837x_rdb_defconfig (attached as .config)
reproduce:
wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# save the attached .config to linux build tree
make.cross ARCH=powerpc
Note: the linux-review/Ramneek-Mehresh/Add-OTG-support-for-FSL-socs/20151224-192624 HEAD 8d1f660bb7a0e738ef7663aa729799df9c540a48 builds fine.
It only hurts bisectibility.
All errors (new ones prefixed by >>):
drivers/usb/host/ehci-fsl.c: In function 'ehci_fsl_drv_suspend':
>> drivers/usb/host/ehci-fsl.c:568:10: error: 'struct usb_bus' has no member named 'is_otg'
if (host->is_otg) {
^
drivers/usb/host/ehci-fsl.c:572:7: error: 'struct usb_bus' has no member named 'is_otg'
host->is_otg = 0;
^
drivers/usb/host/ehci-fsl.c: In function 'ehci_fsl_drv_resume':
drivers/usb/host/ehci-fsl.c:598:10: error: 'struct usb_bus' has no member named 'is_otg'
if (host->is_otg) {
^
drivers/usb/host/ehci-fsl.c:602:7: error: 'struct usb_bus' has no member named 'is_otg'
host->is_otg = 0;
^
vim +568 drivers/usb/host/ehci-fsl.c
562
563 if (of_device_is_compatible(dev->parent->of_node,
564 "fsl,mpc5121-usb2-dr")) {
565 return ehci_fsl_mpc512x_drv_suspend(dev);
566 }
567
> 568 if (host->is_otg) {
569 /* remove hcd */
570 ehci_fsl->hcd_add = 0;
571 schedule_work(&ehci_fsl->change_hcd_work);
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation