diff options
Diffstat (limited to 'drivers/usb/chipidea/otg_fsm.c')
| -rw-r--r-- | drivers/usb/chipidea/otg_fsm.c | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/drivers/usb/chipidea/otg_fsm.c b/drivers/usb/chipidea/otg_fsm.c index 5afeb59acaa..bb64fb486ee 100644 --- a/drivers/usb/chipidea/otg_fsm.c +++ b/drivers/usb/chipidea/otg_fsm.c @@ -26,6 +26,22 @@ #include "otg.h" #include "otg_fsm.h" +static struct ci_otg_fsm_timer *otg_timer_initializer +(struct ci_hdrc *ci, void (*function)(void *, unsigned long), + unsigned long expires, unsigned long data) +{ + struct ci_otg_fsm_timer *timer; + + timer = devm_kzalloc(ci->dev, sizeof(struct ci_otg_fsm_timer), + GFP_KERNEL); + if (!timer) + return NULL; + timer->function = function; + timer->expires = expires; + timer->data = data; + return timer; +} + /* * Add timer to active timer list */ @@ -77,6 +93,163 @@ static void ci_otg_del_timer(struct ci_hdrc *ci, enum ci_otg_fsm_timer_index t) hw_write_otgsc(ci, OTGSC_1MSIE, 0); } +/* The timeout callback function to set time out bit */ +static void set_tmout(void *ptr, unsigned long indicator) +{ + *(int *)indicator = 1; +} + +static void set_tmout_and_fsm(void *ptr, unsigned long indicator) +{ + struct ci_hdrc *ci = (struct ci_hdrc *)ptr; + + set_tmout(ci, indicator); + + disable_irq_nosync(ci->irq); + queue_work(ci->wq, &ci->work); +} + +static void a_wait_vfall_tmout_func(void *ptr, unsigned long indicator) +{ + struct ci_hdrc *ci = (struct ci_hdrc *)ptr; + + set_tmout(ci, indicator); + /* 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); + disable_irq_nosync(ci->irq); + queue_work(ci->wq, &ci->work); +} + +static void b_ase0_brst_tmout_func(void *ptr, unsigned long indicator) +{ + struct ci_hdrc *ci = (struct ci_hdrc *)ptr; + + set_tmout(ci, indicator); + if (!hw_read_otgsc(ci, OTGSC_BSV)) + ci->fsm.b_sess_vld = 0; + + disable_irq_nosync(ci->irq); + queue_work(ci->wq, &ci->work); +} + +static void b_ssend_srp_tmout_func(void *ptr, unsigned long indicator) +{ + struct ci_hdrc *ci = (struct ci_hdrc *)ptr; + + set_tmout(ci, indicator); + + /* only vbus fall below B_sess_vld in b_idle state */ + if (ci->transceiver->state == OTG_STATE_B_IDLE) { + disable_irq_nosync(ci->irq); + queue_work(ci->wq, &ci->work); + } +} + +static void b_sess_vld_tmout_func(void *ptr, unsigned long indicator) +{ + struct ci_hdrc *ci = (struct ci_hdrc *)ptr; + + /* Check if A detached */ + if (!(hw_read_otgsc(ci, OTGSC_BSV))) { + ci->fsm.b_sess_vld = 0; + ci_otg_add_timer(ci, B_SSEND_SRP); + disable_irq_nosync(ci->irq); + queue_work(ci->wq, &ci->work); + } +} + +static void b_data_pulse_end(void *ptr, unsigned long indicator) +{ + struct ci_hdrc *ci = (struct ci_hdrc *)ptr; + + ci->fsm.b_srp_done = 1; + ci->fsm.b_bus_req = 0; + if (ci->fsm.power_up) + ci->fsm.power_up = 0; + + hw_write_otgsc(ci, OTGSC_HABA, 0); + + disable_irq_nosync(ci->irq); + queue_work(ci->wq, &ci->work); +} + +/* Initialize timers */ +static int ci_otg_init_timers(struct ci_hdrc *ci) +{ + struct otg_fsm *fsm = &ci->fsm; + + /* FSM used timers */ + ci->fsm_timer->timer_list[A_WAIT_VRISE] = + otg_timer_initializer(ci, &set_tmout_and_fsm, TA_WAIT_VRISE, + (unsigned long)&fsm->a_wait_vrise_tmout); + if (ci->fsm_timer->timer_list[A_WAIT_VRISE] == NULL) + return -ENOMEM; + + ci->fsm_timer->timer_list[A_WAIT_VFALL] = + otg_timer_initializer(ci, &a_wait_vfall_tmout_func, + TA_WAIT_VFALL, (unsigned long)&fsm->a_wait_vfall_tmout); + if (ci->fsm_timer->timer_list[A_WAIT_VFALL] == NULL) + return -ENOMEM; + + ci->fsm_timer->timer_list[A_WAIT_BCON] = + otg_timer_initializer(ci, &set_tmout_and_fsm, TA_WAIT_BCON, + (unsigned long)&fsm->a_wait_bcon_tmout); + if (ci->fsm_timer->timer_list[A_WAIT_BCON] == NULL) + return -ENOMEM; + + ci->fsm_timer->timer_list[A_AIDL_BDIS] = + otg_timer_initializer(ci, &set_tmout_and_fsm, TA_AIDL_BDIS, + (unsigned long)&fsm->a_aidl_bdis_tmout); + if (ci->fsm_timer->timer_list[A_AIDL_BDIS] == NULL) + return -ENOMEM; + + ci->fsm_timer->timer_list[A_BIDL_ADIS] = + otg_timer_initializer(ci, &set_tmout_and_fsm, TA_BIDL_ADIS, + (unsigned long)&fsm->a_bidl_adis_tmout); + if (ci->fsm_timer->timer_list[A_BIDL_ADIS] == NULL) + return -ENOMEM; + + ci->fsm_timer->timer_list[B_ASE0_BRST] = + otg_timer_initializer(ci, &b_ase0_brst_tmout_func, TB_ASE0_BRST, + (unsigned long)&fsm->b_ase0_brst_tmout); + if (ci->fsm_timer->timer_list[B_ASE0_BRST] == NULL) + return -ENOMEM; + + ci->fsm_timer->timer_list[B_SE0_SRP] = + otg_timer_initializer(ci, &set_tmout_and_fsm, TB_SE0_SRP, + (unsigned long)&fsm->b_se0_srp); + if (ci->fsm_timer->timer_list[B_SE0_SRP] == NULL) + return -ENOMEM; + + ci->fsm_timer->timer_list[B_SSEND_SRP] = + otg_timer_initializer(ci, &b_ssend_srp_tmout_func, TB_SSEND_SRP, + (unsigned long)&fsm->b_ssend_srp); + if (ci->fsm_timer->timer_list[B_SSEND_SRP] == NULL) + return -ENOMEM; + + ci->fsm_timer->timer_list[B_SRP_FAIL] = + otg_timer_initializer(ci, &set_tmout, TB_SRP_FAIL, + (unsigned long)&fsm->b_srp_done); + if (ci->fsm_timer->timer_list[B_SRP_FAIL] == NULL) + return -ENOMEM; + + ci->fsm_timer->timer_list[B_DATA_PLS] = + otg_timer_initializer(ci, &b_data_pulse_end, TB_DATA_PLS, 0); + if (ci->fsm_timer->timer_list[B_DATA_PLS] == NULL) + return -ENOMEM; + + ci->fsm_timer->timer_list[B_SESS_VLD] = otg_timer_initializer(ci, + &b_sess_vld_tmout_func, TB_SESS_VLD, 0); + if (ci->fsm_timer->timer_list[B_SESS_VLD] == NULL) + return -ENOMEM; + + return 0; +} + /* -------------------------------------------------------------*/ /* Operations that will be called from OTG Finite State Machine */ /* -------------------------------------------------------------*/ @@ -223,6 +396,7 @@ static struct otg_fsm_ops ci_otg_ops = { int ci_hdrc_otg_fsm_init(struct ci_hdrc *ci) { + int retval = 0; struct usb_otg *otg; otg = devm_kzalloc(ci->dev, @@ -244,6 +418,21 @@ int ci_hdrc_otg_fsm_init(struct ci_hdrc *ci) mutex_init(&ci->fsm.lock); + ci->fsm_timer = devm_kzalloc(ci->dev, + sizeof(struct ci_otg_fsm_timer_list), GFP_KERNEL); + if (!ci->fsm_timer) { + dev_err(ci->dev, + "Failed to allocate timer structure for ci hdrc otg!\n"); + return -ENOMEM; + } + + INIT_LIST_HEAD(&ci->fsm_timer->active_timers); + retval = ci_otg_init_timers(ci); + if (retval) { + dev_err(ci->dev, "Couldn't init OTG timers\n"); + return retval; + } + /* Enable A vbus valid irq */ hw_write_otgsc(ci, OTGSC_AVVIE, OTGSC_AVVIE); |