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path: root/drivers/usb/chipidea
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Diffstat (limited to 'drivers/usb/chipidea')
-rw-r--r--drivers/usb/chipidea/bits.h1
-rw-r--r--drivers/usb/chipidea/otg_fsm.c189
-rw-r--r--drivers/usb/chipidea/otg_fsm.h51
3 files changed, 241 insertions, 0 deletions
diff --git a/drivers/usb/chipidea/bits.h b/drivers/usb/chipidea/bits.h
index 44882c8133d6..ca57e3dcd3d5 100644
--- a/drivers/usb/chipidea/bits.h
+++ b/drivers/usb/chipidea/bits.h
@@ -81,6 +81,7 @@
/* OTGSC */
#define OTGSC_IDPU BIT(5)
#define OTGSC_HADP BIT(6)
+#define OTGSC_HABA BIT(7)
#define OTGSC_ID BIT(8)
#define OTGSC_AVV BIT(9)
#define OTGSC_ASV BIT(10)
diff --git a/drivers/usb/chipidea/otg_fsm.c b/drivers/usb/chipidea/otg_fsm.c
index 5afeb59acaa6..bb64fb486eef 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);
diff --git a/drivers/usb/chipidea/otg_fsm.h b/drivers/usb/chipidea/otg_fsm.h
index 4d0dfe6900d6..420f081e7e6a 100644
--- a/drivers/usb/chipidea/otg_fsm.h
+++ b/drivers/usb/chipidea/otg_fsm.h
@@ -13,6 +13,57 @@
#include <linux/usb/otg-fsm.h>
+/*
+ * A-DEVICE timing constants
+ */
+
+/* Wait for VBUS Rise */
+#define TA_WAIT_VRISE (100) /* a_wait_vrise: section 7.1.2
+ * a_wait_vrise_tmr: section 7.4.5.1
+ * TA_VBUS_RISE <= 100ms, section 4.4
+ * Table 4-1: Electrical Characteristics
+ * ->DC Electrical Timing
+ */
+/* Wait for VBUS Fall */
+#define TA_WAIT_VFALL (1000) /* a_wait_vfall: section 7.1.7
+ * a_wait_vfall_tmr: section: 7.4.5.2
+ */
+/* Wait for B-Connect */
+#define TA_WAIT_BCON (10000) /* a_wait_bcon: section 7.1.3
+ * TA_WAIT_BCON: should be between 1100
+ * and 30000 ms, section 5.5, Table 5-1
+ */
+/* A-Idle to B-Disconnect */
+#define TA_AIDL_BDIS (5000) /* a_suspend min 200 ms, section 5.2.1
+ * TA_AIDL_BDIS: section 5.5, Table 5-1
+ */
+/* B-Idle to A-Disconnect */
+#define TA_BIDL_ADIS (500) /* TA_BIDL_ADIS: section 5.2.1
+ * 500ms is used for B switch to host
+ * for safe
+ */
+
+/*
+ * B-device timing constants
+ */
+
+/* Data-Line Pulse Time*/
+#define TB_DATA_PLS (10) /* b_srp_init,continue 5~10ms
+ * section:5.1.3
+ */
+/* SRP Fail Time */
+#define TB_SRP_FAIL (6000) /* b_srp_init,fail time 5~6s
+ * section:5.1.6
+ */
+/* A-SE0 to B-Reset */
+#define TB_ASE0_BRST (155) /* minimum 155 ms, section:5.3.1 */
+/* SE0 Time Before SRP */
+#define TB_SE0_SRP (1000) /* b_idle,minimum 1s, section:5.1.2 */
+/* SSEND time before SRP */
+#define TB_SSEND_SRP (1500) /* minimum 1.5 sec, section:5.1.2 */
+
+#define TB_SESS_VLD (1000)
+
enum ci_otg_fsm_timer_index {
/*
* CI specific timers, start from the end
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-02 03:33:49 +0300