[PATCH v4 4/7] usb: chipidea: consolidate ci_role_driver's API for both roles
Peter Chen
peter.chen at freescale.com
Thu Dec 27 02:00:00 EST 2012
- Create init/destroy API for probe and remove
- start/stop API are only used otg id switch process
- Create the gadget at ci_hdrc_probe if the gadget is supported
at that port, the main purpose for this is to avoid gadget module
load fail at init.rc
Signed-off-by: Peter Chen <peter.chen at freescale.com>
---
Changes for v4:
- Move some udc operation from core to udc->init
Changes for v3:
- Create init/destroy API for probe and remove
- start/stop API are only used otg id switch process
drivers/usb/chipidea/ci.h | 19 +++++++++++-
drivers/usb/chipidea/core.c | 65 ++++++++++++++++++------------------------
drivers/usb/chipidea/host.c | 2 +
drivers/usb/chipidea/udc.c | 33 ++++++++++++++++++++-
4 files changed, 78 insertions(+), 41 deletions(-)
diff --git a/drivers/usb/chipidea/ci.h b/drivers/usb/chipidea/ci.h
index 325d790..00939e6 100644
--- a/drivers/usb/chipidea/ci.h
+++ b/drivers/usb/chipidea/ci.h
@@ -67,14 +67,18 @@ enum ci_role {
/**
* struct ci_role_driver - host/gadget role driver
- * start: start this role
- * stop: stop this role
+ * init: init this role (used at module probe)
+ * start: start this role (used at id switch)
+ * stop: stop this role (used at id switch)
+ * destroy: destroy this role (used at module remove)
* irq: irq handler for this role
* name: role name string (host/gadget)
*/
struct ci_role_driver {
+ int (*init)(struct ci13xxx *);
int (*start)(struct ci13xxx *);
void (*stop)(struct ci13xxx *);
+ void (*destroy)(struct ci13xxx *);
irqreturn_t (*irq)(struct ci13xxx *);
const char *name;
};
@@ -206,6 +210,17 @@ static inline void ci_role_stop(struct ci13xxx *ci)
ci->roles[role]->stop(ci);
}
+static inline void ci_role_destroy(struct ci13xxx *ci)
+{
+ enum ci_role role = ci->role;
+
+ if (role == CI_ROLE_END)
+ return;
+
+ ci->role = CI_ROLE_END;
+
+ ci->roles[role]->destroy(ci);
+}
/******************************************************************************
* REGISTERS
*****************************************************************************/
diff --git a/drivers/usb/chipidea/core.c b/drivers/usb/chipidea/core.c
index f8f8484..a5adf1a 100644
--- a/drivers/usb/chipidea/core.c
+++ b/drivers/usb/chipidea/core.c
@@ -315,27 +315,16 @@ static void ci_handle_id_switch(struct ci13xxx *ci)
ci_role(ci)->name, ci->roles[role]->name);
/* 1. Finish the current role */
- if (ci->role == CI_ROLE_GADGET) {
- usb_gadget_vbus_disconnect(&ci->gadget);
- /* host doesn't care B_SESSION_VALID event */
- ci_clear_otg_interrupt(ci, OTGSC_BSVIS);
- ci_disable_otg_interrupt(ci, OTGSC_BSVIE);
- ci->role = CI_ROLE_END;
- /* reset controller */
- hw_device_reset(ci, USBMODE_CM_IDLE);
- } else if (ci->role == CI_ROLE_HOST) {
- ci_role_stop(ci);
- /* reset controller */
- hw_device_reset(ci, USBMODE_CM_IDLE);
- }
+ ci_role_stop(ci);
+ hw_device_reset(ci, USBMODE_CM_IDLE);
/* 2. Turn on/off vbus according to coming role */
- if (ci_otg_role(ci) == CI_ROLE_GADGET) {
+ if (role == CI_ROLE_GADGET) {
otg_set_vbus(&ci->otg, false);
/* wait vbus lower than OTGSC_BSV */
hw_wait_reg(ci, OP_OTGSC, OTGSC_BSV, 0,
CI_VBUS_STABLE_TIMEOUT);
- } else if (ci_otg_role(ci) == CI_ROLE_HOST) {
+ } else if (role == CI_ROLE_HOST) {
otg_set_vbus(&ci->otg, true);
/* wait vbus higher than OTGSC_AVV */
hw_wait_reg(ci, OP_OTGSC, OTGSC_AVV, OTGSC_AVV,
@@ -343,13 +332,7 @@ static void ci_handle_id_switch(struct ci13xxx *ci)
}
/* 3. Begin the new role */
- if (ci_otg_role(ci) == CI_ROLE_GADGET) {
- ci->role = role;
- ci_clear_otg_interrupt(ci, OTGSC_BSVIS);
- ci_enable_otg_interrupt(ci, OTGSC_BSVIE);
- } else if (ci_otg_role(ci) == CI_ROLE_HOST) {
- ci_role_start(ci, role);
- }
+ ci_role_start(ci, role);
}
}
@@ -585,7 +568,7 @@ static int ci_hdrc_probe(struct platform_device *pdev)
ret = ci_hdrc_gadget_init(ci);
if (ret)
- dev_info(dev, "doesn't support gadget\n");
+ dev_info(dev, "doesn't support gadget, ret=%d\n", ret);
if (!ci->roles[CI_ROLE_HOST] && !ci->roles[CI_ROLE_GADGET]) {
dev_err(dev, "no supported roles\n");
@@ -607,22 +590,30 @@ static int ci_hdrc_probe(struct platform_device *pdev)
: CI_ROLE_GADGET;
}
- ret = ci_role_start(ci, ci->role);
- if (ret) {
- dev_err(dev, "can't start %s role\n", ci_role(ci)->name);
- ret = -ENODEV;
- goto rm_wq;
- }
-
otgsc = hw_read(ci, OP_OTGSC, ~0);
+
/*
- * if it is device mode:
- * - Enable vbus detect
- * - If it has already connected to host, notify udc
+ * If the gadget is supported, call its init unconditionally,
+ * We need to support load gadget module at init.rc.
*/
- if (ci->role == CI_ROLE_GADGET) {
- ci_enable_otg_interrupt(ci, OTGSC_BSVIE);
- ci_handle_vbus_change(ci);
+ if (ci->roles[CI_ROLE_GADGET]) {
+ ret = ci->roles[CI_ROLE_GADGET]->init(ci);
+ if (ret) {
+ dev_err(dev, "can't init %s role, ret=%d\n",
+ ci_role(ci)->name, ret);
+ ret = -ENODEV;
+ goto rm_wq;
+ }
+ }
+
+ if (ci->role == CI_ROLE_HOST) {
+ ret = ci->roles[CI_ROLE_HOST]->init(ci);
+ if (ret) {
+ dev_err(dev, "can't init %s role, ret=%d\n",
+ ci_role(ci)->name, ret);
+ ret = -ENODEV;
+ goto rm_wq;
+ }
}
platform_set_drvdata(pdev, ci);
@@ -660,7 +651,7 @@ static int ci_hdrc_remove(struct platform_device *pdev)
destroy_workqueue(ci->wq);
device_remove_file(ci->dev, &dev_attr_role);
free_irq(ci->irq, ci);
- ci_role_stop(ci);
+ ci_role_destroy(ci);
return 0;
}
diff --git a/drivers/usb/chipidea/host.c b/drivers/usb/chipidea/host.c
index caecad9..6024a4f 100644
--- a/drivers/usb/chipidea/host.c
+++ b/drivers/usb/chipidea/host.c
@@ -92,8 +92,10 @@ int ci_hdrc_host_init(struct ci13xxx *ci)
if (!rdrv)
return -ENOMEM;
+ rdrv->init = host_start;
rdrv->start = host_start;
rdrv->stop = host_stop;
+ rdrv->destroy = host_stop;
rdrv->irq = host_irq;
rdrv->name = "host";
ci->roles[CI_ROLE_HOST] = rdrv;
diff --git a/drivers/usb/chipidea/udc.c b/drivers/usb/chipidea/udc.c
index b52cb10..1ac6321 100644
--- a/drivers/usb/chipidea/udc.c
+++ b/drivers/usb/chipidea/udc.c
@@ -31,6 +31,7 @@
#include "ci.h"
#include "udc.h"
+#include "otg.h"
#include "bits.h"
#include "debug.h"
@@ -1754,6 +1755,16 @@ static int udc_start(struct ci13xxx *ci)
pm_runtime_no_callbacks(&ci->gadget.dev);
pm_runtime_enable(&ci->gadget.dev);
+ /*
+ * if it is device mode:
+ * - Enable vbus detect
+ * - If it has already connected to host, notify udc
+ */
+ if (ci->role == CI_ROLE_GADGET) {
+ ci_enable_otg_interrupt(ci, OTGSC_BSVIE);
+ ci_handle_vbus_change(ci);
+ }
+
return retval;
remove_trans:
@@ -1780,6 +1791,22 @@ free_qh_pool:
return retval;
}
+static int udc_id_switch_for_device(struct ci13xxx *ci)
+{
+ ci_clear_otg_interrupt(ci, OTGSC_BSVIS);
+ ci_enable_otg_interrupt(ci, OTGSC_BSVIE);
+
+ return 0;
+}
+
+static void udc_id_switch_for_host(struct ci13xxx *ci)
+{
+ usb_gadget_vbus_disconnect(&ci->gadget);
+ /* host doesn't care B_SESSION_VALID event */
+ ci_clear_otg_interrupt(ci, OTGSC_BSVIS);
+ ci_disable_otg_interrupt(ci, OTGSC_BSVIE);
+}
+
/**
* udc_remove: parent remove must call this to remove UDC
*
@@ -1825,8 +1852,10 @@ int ci_hdrc_gadget_init(struct ci13xxx *ci)
if (!rdrv)
return -ENOMEM;
- rdrv->start = udc_start;
- rdrv->stop = udc_stop;
+ rdrv->init = udc_start;
+ rdrv->start = udc_id_switch_for_device;
+ rdrv->stop = udc_id_switch_for_host;
+ rdrv->destroy = udc_stop;
rdrv->irq = udc_irq;
rdrv->name = "gadget";
ci->roles[CI_ROLE_GADGET] = rdrv;
--
1.7.0.4
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