On Wed, Mar 26, 2014 at 12:52:57PM +0800, Peter Chen wrote:
> On Wed, Mar 19, 2014 at 06:01:38PM +0800, Li Jun wrote:
> > Add OTG HNP and SRP operation functions implementation:
> > - charge vbus
> > - drive vbus
> > - connection signaling
> > - drive sof
> > - start data pulse
> > - add fsm timer
> > - delete fsm timer
> > - start host
> > - start gadget
> >
> > Signed-off-by: Li Jun <[email protected]>
> > ---
> > drivers/usb/chipidea/bits.h | 10 +-
> > drivers/usb/chipidea/ci.h | 1 +
> > drivers/usb/chipidea/otg_fsm.c | 203
> > ++++++++++++++++++++++++++++++++++++++++
> > drivers/usb/chipidea/otg_fsm.h | 23 +++++
> > 4 files changed, 236 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/usb/chipidea/bits.h b/drivers/usb/chipidea/bits.h
> > index 83d06c1..9e95378 100644
> > --- a/drivers/usb/chipidea/bits.h
> > +++ b/drivers/usb/chipidea/bits.h
> > @@ -44,9 +44,14 @@
> > #define DEVICEADDR_USBADR (0x7FUL << 25)
> >
> > /* PORTSC */
> > +#define PORTSC_CCS BIT(0)
> > +#define PORTSC_CSC BIT(1)
> > +#define PORTSC_PEC BIT(3)
> > +#define PORTSC_OCC BIT(5)
> > #define PORTSC_FPR BIT(6)
> > #define PORTSC_SUSP BIT(7)
> > #define PORTSC_HSP BIT(9)
> > +#define PORTSC_PP BIT(12)
> > #define PORTSC_PTC (0x0FUL << 16)
> > #define PORTSC_PHCD(d) ((d) ? BIT(22) : BIT(23))
> > /* PTS and PTW for non lpm version only */
> > @@ -56,6 +61,9 @@
> > #define PORTSC_PTW BIT(28)
> > #define PORTSC_STS BIT(29)
> >
> > +#define PORTSC_W1C_BITS \
> > + (PORTSC_CSC | PORTSC_PEC | PORTSC_OCC)
> > +
> > /* DEVLC */
> > #define DEVLC_PFSC BIT(23)
> > #define DEVLC_PSPD (0x03UL << 25)
> > @@ -69,9 +77,9 @@
> > #define PTS_ULPI 2
> > #define PTS_SERIAL 3
> > #define PTS_HSIC 4
> > -
>
> Do we really need to delete this blank line between two registers?
>
I will remove this change.
> > /* OTGSC */
> > #define OTGSC_IDPU BIT(5)
> > +#define OTGSC_HADP BIT(6)
> > #define OTGSC_ID BIT(8)
> > #define OTGSC_AVV BIT(9)
> > #define OTGSC_ASV BIT(10)
> > diff --git a/drivers/usb/chipidea/ci.h b/drivers/usb/chipidea/ci.h
> > index 4491c43..cece7e2 100644
> > --- a/drivers/usb/chipidea/ci.h
> > +++ b/drivers/usb/chipidea/ci.h
> > @@ -176,6 +176,7 @@ struct ci_hdrc {
> > enum ci_role role;
> > bool is_otg;
> > struct otg_fsm fsm;
> > + struct ci_otg_fsm_timer_list *fsm_timer;
> > struct work_struct work;
> > struct workqueue_struct *wq;
> >
> > diff --git a/drivers/usb/chipidea/otg_fsm.c b/drivers/usb/chipidea/otg_fsm.c
> > index fbe63f0..f0e50fd 100644
> > --- a/drivers/usb/chipidea/otg_fsm.c
> > +++ b/drivers/usb/chipidea/otg_fsm.c
> > @@ -18,12 +18,214 @@
> > #include <linux/usb/otg.h>
> > #include <linux/usb/gadget.h>
> > #include <linux/usb/chipidea.h>
> > +#include <linux/regulator/consumer.h>
> >
> > #include "ci.h"
> > #include "bits.h"
> > #include "otg.h"
> > #include "otg_fsm.h"
> >
> > +/*
> > + * Add timer to active timer list
> > + */
> > +static void ci_otg_add_timer(struct ci_hdrc *ci, enum
> > ci_otg_fsm_timer_index t)
> > +{
> > + struct ci_otg_fsm_timer *tmp_timer;
> > + struct ci_otg_fsm_timer *timer = ci->fsm_timer->timer_list[t];
> > + struct list_head *active_timers = &ci->fsm_timer->active_timers;
> > +
> > + if (t >= NUM_CI_OTG_FSM_TIMERS)
> > + return;
> > +
> > + /*
> > + * Check if the timer is already in the active list,
> > + * if so update timer count
> > + */
> > + list_for_each_entry(tmp_timer, active_timers, list)
> > + if (tmp_timer == timer) {
> > + timer->count = timer->expires;
> > + return;
> > + }
> > +
> > + timer->count = timer->expires;
> > + list_add_tail(&timer->list, active_timers);
> > +
> > + /* Enable 1ms irq */
> > + if (!(hw_read_otgsc(ci, OTGSC_1MSIE)))
> > + hw_write_otgsc(ci, OTGSC_1MSIE, OTGSC_1MSIE);
> > +}
> > +
> > +/*
> > + * Remove timer from active timer list
> > + */
> > +static void ci_otg_del_timer(struct ci_hdrc *ci, enum
> > ci_otg_fsm_timer_index t)
> > +{
> > + struct ci_otg_fsm_timer *tmp_timer, *del_tmp;
> > + struct ci_otg_fsm_timer *timer = ci->fsm_timer->timer_list[t];
> > + struct list_head *active_timers = &ci->fsm_timer->active_timers;
> > +
> > + if (t >= NUM_CI_OTG_FSM_TIMERS)
> > + return;
> > +
> > + list_for_each_entry_safe(tmp_timer, del_tmp, active_timers, list)
> > + if (tmp_timer == timer)
> > + list_del(&timer->list);
> > +
> > + /* Disable 1ms irq if there is no any active timer */
> > + if (list_empty(active_timers))
> > + hw_write_otgsc(ci, OTGSC_1MSIE, 0);
> > +}
> > +
> > +/* -------------------------------------------------------------*/
> > +/* Operations that will be called from OTG Finite State Machine */
> > +/* -------------------------------------------------------------*/
> > +static void ci_otg_fsm_add_timer(struct otg_fsm *fsm, enum otg_fsm_timer t)
> > +{
> > + struct ci_hdrc *ci = container_of(fsm, struct ci_hdrc, fsm);
> > +
> > + if (t < NUM_OTG_FSM_TIMERS)
> > + ci_otg_add_timer(ci, t);
> > + return;
> > +}
> > +
> > +static void ci_otg_fsm_del_timer(struct otg_fsm *fsm, enum otg_fsm_timer t)
> > +{
> > + struct ci_hdrc *ci = container_of(fsm, struct ci_hdrc, fsm);
> > +
> > + if (t < NUM_OTG_FSM_TIMERS)
> > + ci_otg_del_timer(ci, t);
> > + return;
> > +}
> > +
> > +/*
> > + * A-device drive vbus: turn on vbus regulater and enable port power
> > + * Data pulse irq should be disabled while vbus is on.
> > + */
> > +static void ci_otg_drv_vbus(struct otg_fsm *fsm, int on)
> > +{
> > + int ret;
> > + struct ci_hdrc *ci = container_of(fsm, struct ci_hdrc, fsm);
> > +
> > + if (on) {
> > + /* Enable power power */
> > + hw_write(ci, OP_PORTSC, PORTSC_W1C_BITS | PORTSC_PP,
> > + PORTSC_PP);
> > + if (ci->platdata->reg_vbus) {
> > + ret = regulator_enable(ci->platdata->reg_vbus);
> > + if (ret) {
> > + dev_err(ci->dev,
> > + "Failed to enable vbus regulator, ret=%d\n",
> > + ret);
> > + return;
> > + }
> > + }
> > + /* Disable data pulse irq */
> > + hw_write_otgsc(ci, OTGSC_DPIE, 0);
> > + } else {
> > + if (ci->platdata->reg_vbus)
> > + regulator_disable(ci->platdata->reg_vbus);
> > + /* Disable port power */
> > + hw_write(ci, OP_PORTSC, PORTSC_W1C_BITS | PORTSC_PP, 0);
> > +
> > + /* Clear exsiting DP irq */
> > + hw_write_otgsc(ci, OTGSC_DPIS, OTGSC_DPIS);
> > + /* Enable data pulse irq */
> > + hw_write_otgsc(ci, OTGSC_DPIE, OTGSC_DPIE);
> > + }
> > +}
> > +
> > +/*
> > + * Control data line by Run Stop bit.
> > + */
> > +static void ci_otg_loc_conn(struct otg_fsm *fsm, int on)
> > +{
> > + struct ci_hdrc *ci = container_of(fsm, struct ci_hdrc, fsm);
> > +
> > + if (on)
> > + hw_write(ci, OP_USBCMD, USBCMD_RS, USBCMD_RS);
> > + else
> > + hw_write(ci, OP_USBCMD, USBCMD_RS, 0);
> > +}
> > +
> > +/*
> > + * Generate SOF by host.
> > + * This is controlled through suspend/resume the port.
> > + * In host mode, controller will automatically send SOF.
> > + * Suspend will block the data on the port.
> > + */
> > +static void ci_otg_loc_sof(struct otg_fsm *fsm, int on)
> > +{
> > + struct ci_hdrc *ci = container_of(fsm, struct ci_hdrc, fsm);
> > +
> > + if (on)
> > + hw_write(ci, OP_PORTSC, PORTSC_W1C_BITS | PORTSC_FPR,
> > + PORTSC_FPR);
> > + else
> > + hw_write(ci, OP_PORTSC, PORTSC_W1C_BITS | PORTSC_SUSP,
> > + PORTSC_SUSP);
> > +}
> > +
> > +/*
> > + * Start SRP pulsing by data-line pulsing,
> > + * no v-bus pulsing followed
> > + */
> > +static void ci_otg_start_pulse(struct otg_fsm *fsm)
> > +{
> > + struct ci_hdrc *ci = container_of(fsm, struct ci_hdrc, fsm);
> > +
> > + /* Hardware Assistant Data pulse */
> > + hw_write_otgsc(ci, OTGSC_HADP, OTGSC_HADP);
> > +
> > + ci_otg_add_timer(ci, B_DATA_PLS);
> > +}
> > +
> > +static int ci_otg_start_host(struct otg_fsm *fsm, int on)
> > +{
> > + struct ci_hdrc *ci = container_of(fsm, struct ci_hdrc, fsm);
> > +
> > + mutex_unlock(&fsm->lock);
> > + if (on) {
> > + if (ci->role != CI_ROLE_HOST) {
> > + ci_role_stop(ci);
> > + ci_role_start(ci, CI_ROLE_HOST);
> > + }
> > + } else {
> > + if (ci->role == CI_ROLE_HOST) {
> > + ci_role_stop(ci);
> > + ci_role_start(ci, CI_ROLE_GADGET);
> > + }
> > + }
> > + mutex_lock(&fsm->lock);
> > + return 0;
> > +}
> > +
> > +static int ci_otg_start_gadget(struct otg_fsm *fsm, int on)
> > +{
> > + struct ci_hdrc *ci = container_of(fsm, struct ci_hdrc, fsm);
> > +
> > + mutex_unlock(&fsm->lock);
> > + if (on) {
> > + if (ci->role == CI_ROLE_GADGET)
> > + usb_gadget_vbus_connect(&ci->gadget);
> > + } else {
> > + if (ci->role == CI_ROLE_GADGET)
> > + usb_gadget_vbus_disconnect(&ci->gadget);
> > + }
> > + mutex_lock(&fsm->lock);
> > + return 0;
> > +}
>
> Can we know ci->role before calling ci_otg_start_host/gadget?
> In that case, these two APIs are be simpler?
>
Yes, caller already checked the current role before call those APIs,
I will remove ci->role check, thanks!
> > +
> > +static struct otg_fsm_ops ci_otg_ops = {
> > + .drv_vbus = ci_otg_drv_vbus,
> > + .loc_conn = ci_otg_loc_conn,
> > + .loc_sof = ci_otg_loc_sof,
> > + .start_pulse = ci_otg_start_pulse,
> > + .add_timer = ci_otg_fsm_add_timer,
> > + .del_timer = ci_otg_fsm_del_timer,
> > + .start_host = ci_otg_start_host,
> > + .start_gadget = ci_otg_start_gadget,
> > +};
> > +
> > int ci_hdrc_otg_fsm_init(struct ci_hdrc *ci)
> > {
> > if (ci->platdata->dr_mode != USB_DR_MODE_OTG)
> > @@ -43,6 +245,7 @@ int ci_hdrc_otg_fsm_init(struct ci_hdrc *ci)
> > ci->fsm.otg->phy = ci->transceiver;
> > ci->fsm.otg->gadget = &ci->gadget;
> > ci->transceiver->state = OTG_STATE_UNDEFINED;
> > + ci->fsm.ops = &ci_otg_ops;
> >
> > mutex_init(&ci->fsm.lock);
> >
> > diff --git a/drivers/usb/chipidea/otg_fsm.h b/drivers/usb/chipidea/otg_fsm.h
> > index cf27253..1c2eae8 100644
> > --- a/drivers/usb/chipidea/otg_fsm.h
> > +++ b/drivers/usb/chipidea/otg_fsm.h
> > @@ -13,6 +13,29 @@
> >
> > #include <linux/usb/otg-fsm.h>
> >
> > +enum ci_otg_fsm_timer_index {
> > + /* CI specific timers, start from the end
> > + * of standard and auxiliary OTG timers */
>
> Change comment style please.
>
Sorry, missing this one, will update.
> > + B_DATA_PLS = NUM_OTG_FSM_TIMERS,
> > + B_SSEND_SRP,
> > + B_SESS_VLD,
> > +
> > + NUM_CI_OTG_FSM_TIMERS,
> > +};
> > +
> > +struct ci_otg_fsm_timer {
> > + unsigned long expires; /* Number of count increase to timeout */
> > + unsigned long count; /* Tick counter */
> > + void (*function)(void *, unsigned long); /* Timeout function */
> > + unsigned long data; /* Data passed to function */
> > + struct list_head list;
> > +};
> > +
> > +struct ci_otg_fsm_timer_list {
> > + struct ci_otg_fsm_timer *timer_list[NUM_CI_OTG_FSM_TIMERS];
> > + struct list_head active_timers;
> > +};
> > +
> > #ifdef CONFIG_USB_OTG_FSM
> >
> > int ci_hdrc_otg_fsm_init(struct ci_hdrc *ci);
> > --
> > 1.7.9.5
> >
> >
>
> --
>
> Best Regards,
> Peter Chen
>
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