summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
Diffstat
-rw-r--r--drivers/esoc/esoc-mdm-4x.c66
-rw-r--r--drivers/esoc/esoc-mdm-drv.c36
-rw-r--r--drivers/esoc/esoc-mdm-pon.c8
-rw-r--r--drivers/esoc/esoc.h5
4 files changed, 96 insertions, 19 deletions
diff --git a/drivers/esoc/esoc-mdm-4x.c b/drivers/esoc/esoc-mdm-4x.c
index 543bad093090..ac8d8002bcd3 100644
--- a/drivers/esoc/esoc-mdm-4x.c
+++ b/drivers/esoc/esoc-mdm-4x.c
@@ -179,19 +179,37 @@ static int mdm_cmd_exe(enum esoc_cmd cmd, struct esoc_clink *esoc)
struct device *dev = mdm->dev;
int ret;
bool graceful_shutdown = false;
+ u32 status, err_fatal;
switch (cmd) {
case ESOC_PWR_ON:
+ if (esoc->auto_boot) {
+ /*
+ * If esoc has already booted, we would have missed
+ * status change interrupt. Read status and err_fatal
+ * signals to arrive at the state of esoc.
+ */
+ esoc->clink_ops->get_status(&status, esoc);
+ esoc->clink_ops->get_err_fatal(&err_fatal, esoc);
+ if (err_fatal)
+ return -EIO;
+ if (status && !mdm->ready) {
+ mdm->ready = true;
+ esoc->clink_ops->notify(ESOC_BOOT_DONE, esoc);
+ }
+ }
gpio_set_value(MDM_GPIO(mdm, AP2MDM_ERRFATAL), 0);
- mdm_enable_irqs(mdm);
mdm->init = 1;
mdm_do_first_power_on(mdm);
+ mdm_enable_irqs(mdm);
break;
case ESOC_PWR_OFF:
mdm_disable_irqs(mdm);
mdm->debug = 0;
mdm->ready = false;
mdm->trig_cnt = 0;
+ if (esoc->primary)
+ break;
graceful_shutdown = true;
ret = sysmon_send_shutdown(&esoc->subsys);
if (ret) {
@@ -228,6 +246,8 @@ force_poff:
esoc->subsys.sysmon_shutdown_ret);
}
+ if (esoc->primary)
+ break;
/*
* Force a shutdown of the mdm. This is required in order
* to prevent the mdm from immediately powering back on
@@ -249,9 +269,12 @@ force_poff:
*/
mdm->ready = false;
cancel_delayed_work(&mdm->mdm2ap_status_check_work);
- gpio_set_value(MDM_GPIO(mdm, AP2MDM_ERRFATAL), 1);
- dev_dbg(mdm->dev, "set ap2mdm errfatal to force reset\n");
- msleep(mdm->ramdump_delay_ms);
+ if (!mdm->esoc->auto_boot) {
+ gpio_set_value(MDM_GPIO(mdm, AP2MDM_ERRFATAL), 1);
+ dev_dbg(mdm->dev,
+ "set ap2mdm errfatal to force reset\n");
+ msleep(mdm->ramdump_delay_ms);
+ }
break;
case ESOC_EXE_DEBUG:
mdm->debug = 1;
@@ -378,6 +401,8 @@ static void mdm_notify(enum esoc_notify notify, struct esoc_clink *esoc)
status_down = false;
dev_dbg(dev, "signal apq err fatal for graceful restart\n");
gpio_set_value(MDM_GPIO(mdm, AP2MDM_ERRFATAL), 1);
+ if (esoc->primary)
+ break;
timeout = local_clock();
do_div(timeout, NSEC_PER_MSEC);
timeout += MDM_MODEM_TIMEOUT;
@@ -420,7 +445,7 @@ static irqreturn_t mdm_errfatal(int irq, void *dev_id)
goto mdm_pwroff_irq;
esoc = mdm->esoc;
dev_err(dev, "%s: mdm sent errfatal interrupt\n",
- __func__);
+ __func__);
/* disable irq ?*/
esoc_clink_evt_notify(ESOC_ERR_FATAL, esoc);
return IRQ_HANDLED;
@@ -441,11 +466,25 @@ static irqreturn_t mdm_status_change(int irq, void *dev_id)
return IRQ_HANDLED;
dev = mdm->dev;
esoc = mdm->esoc;
+ /*
+ * On auto boot devices, there is a possibility of receiving
+ * status change interrupt before esoc_clink structure is
+ * initialized. Ignore them.
+ */
+ if (!esoc)
+ return IRQ_HANDLED;
value = gpio_get_value(MDM_GPIO(mdm, MDM2AP_STATUS));
if (value == 0 && mdm->ready) {
dev_err(dev, "unexpected reset external modem\n");
esoc_clink_evt_notify(ESOC_UNEXPECTED_RESET, esoc);
} else if (value == 1) {
+ /*
+ * In auto_boot cases, bailout early if mdm
+ * is up already.
+ */
+ if (esoc->auto_boot && mdm->ready)
+ return IRQ_HANDLED;
+
cancel_delayed_work(&mdm->mdm2ap_status_check_work);
dev_dbg(dev, "status = 1: mdm is now ready\n");
mdm->ready = true;
@@ -453,6 +492,8 @@ static irqreturn_t mdm_status_change(int irq, void *dev_id)
queue_work(mdm->mdm_queue, &mdm->mdm_status_work);
if (mdm->get_restart_reason)
queue_work(mdm->mdm_queue, &mdm->restart_reason_work);
+ if (esoc->auto_boot)
+ esoc->clink_ops->notify(ESOC_BOOT_DONE, esoc);
}
return IRQ_HANDLED;
}
@@ -582,13 +623,21 @@ static int mdm_configure_ipc(struct mdm_ctrl *mdm, struct platform_device *pdev)
&mdm->ramdump_delay_ms);
if (ret)
mdm->ramdump_delay_ms = DEF_RAMDUMP_DELAY;
- /* Multilple gpio_request calls are allowed */
+ /*
+ * In certain scenarios, multiple esoc devices are monitoring
+ * same AP2MDM_STATUS line. But only one of them will have a
+ * successful gpio_request call. Initialize gpio only if request
+ * succeeds.
+ */
if (gpio_request(MDM_GPIO(mdm, AP2MDM_STATUS), "AP2MDM_STATUS"))
dev_err(dev, "Failed to configure AP2MDM_STATUS gpio\n");
- /* Multilple gpio_request calls are allowed */
+ else
+ gpio_direction_output(MDM_GPIO(mdm, AP2MDM_STATUS), 0);
if (gpio_request(MDM_GPIO(mdm, AP2MDM_ERRFATAL), "AP2MDM_ERRFATAL"))
dev_err(dev, "%s Failed to configure AP2MDM_ERRFATAL gpio\n",
__func__);
+ else
+ gpio_direction_output(MDM_GPIO(mdm, AP2MDM_ERRFATAL), 0);
if (gpio_request(MDM_GPIO(mdm, MDM2AP_STATUS), "MDM2AP_STATUS")) {
dev_err(dev, "%s Failed to configure MDM2AP_STATUS gpio\n",
__func__);
@@ -621,9 +670,6 @@ static int mdm_configure_ipc(struct mdm_ctrl *mdm, struct platform_device *pdev)
}
}
- gpio_direction_output(MDM_GPIO(mdm, AP2MDM_STATUS), 0);
- gpio_direction_output(MDM_GPIO(mdm, AP2MDM_ERRFATAL), 0);
-
if (gpio_is_valid(MDM_GPIO(mdm, AP2MDM_CHNLRDY)))
gpio_direction_output(MDM_GPIO(mdm, AP2MDM_CHNLRDY), 0);
diff --git a/drivers/esoc/esoc-mdm-drv.c b/drivers/esoc/esoc-mdm-drv.c
index 8697428eceb2..266eaccf8b69 100644
--- a/drivers/esoc/esoc-mdm-drv.c
+++ b/drivers/esoc/esoc-mdm-drv.c
@@ -13,6 +13,7 @@
#include <linux/delay.h>
#include <linux/workqueue.h>
#include <linux/reboot.h>
+#include <linux/of.h>
#include "esoc.h"
#include "mdm-dbg.h"
@@ -72,7 +73,14 @@ static void mdm_handle_clink_evt(enum esoc_evt evt,
break;
case ESOC_UNEXPECTED_RESET:
case ESOC_ERR_FATAL:
- if (mdm_drv->mode == CRASH)
+ /*
+ * Modem can crash while we are waiting for boot_done during
+ * a subsystem_get(). Setting mode to CRASH will prevent a
+ * subsequent subsystem_get() from entering poweron ops. Avoid
+ * this by seting mode to CRASH only if device was up and
+ * running.
+ */
+ if (mdm_drv->mode == CRASH || mdm_drv->mode != RUN)
return;
mdm_drv->mode = CRASH;
queue_work(mdm_drv->mdm_queue, &mdm_drv->ssr_work);
@@ -161,8 +169,9 @@ static int mdm_subsys_powerup(const struct subsys_desc *crashed_subsys)
subsys);
struct mdm_drv *mdm_drv = esoc_get_drv_data(esoc_clink);
const struct esoc_clink_ops const *clink_ops = esoc_clink->clink_ops;
+ int timeout = INT_MAX;
- if (!esoc_req_eng_enabled(esoc_clink)) {
+ if (!esoc_clink->auto_boot && !esoc_req_eng_enabled(esoc_clink)) {
dev_dbg(&esoc_clink->dev, "Wait for req eng registration\n");
wait_for_completion(&mdm_drv->req_eng_wait);
}
@@ -187,8 +196,17 @@ static int mdm_subsys_powerup(const struct subsys_desc *crashed_subsys)
return ret;
}
}
- wait_for_completion(&mdm_drv->boot_done);
- if (mdm_drv->boot_fail) {
+
+ /*
+ * In autoboot case, it is possible that we can forever wait for
+ * boot completion, when esoc fails to boot. This is because there
+ * is no helper application which can alert esoc driver about boot
+ * failure. Prevent going to wait forever in such case.
+ */
+ if (esoc_clink->auto_boot)
+ timeout = 10 * HZ;
+ ret = wait_for_completion_timeout(&mdm_drv->boot_done, timeout);
+ if (mdm_drv->boot_fail || ret <= 0) {
dev_err(&esoc_clink->dev, "booting failed\n");
return -EIO;
}
@@ -216,10 +234,12 @@ static int mdm_subsys_ramdumps(int want_dumps,
static int mdm_register_ssr(struct esoc_clink *esoc_clink)
{
- esoc_clink->subsys.shutdown = mdm_subsys_shutdown;
- esoc_clink->subsys.ramdump = mdm_subsys_ramdumps;
- esoc_clink->subsys.powerup = mdm_subsys_powerup;
- esoc_clink->subsys.crash_shutdown = mdm_crash_shutdown;
+ struct subsys_desc *subsys = &esoc_clink->subsys;
+
+ subsys->shutdown = mdm_subsys_shutdown;
+ subsys->ramdump = mdm_subsys_ramdumps;
+ subsys->powerup = mdm_subsys_powerup;
+ subsys->crash_shutdown = mdm_crash_shutdown;
return esoc_clink_register_ssr(esoc_clink);
}
diff --git a/drivers/esoc/esoc-mdm-pon.c b/drivers/esoc/esoc-mdm-pon.c
index acda06485364..a54c3e2715dd 100644
--- a/drivers/esoc/esoc-mdm-pon.c
+++ b/drivers/esoc/esoc-mdm-pon.c
@@ -1,4 +1,4 @@
-/* Copyright (c) 2014-2015, The Linux Foundation. All rights reserved.
+/* Copyright (c) 2014-2015, 2017, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
@@ -68,6 +68,9 @@ static int mdm4x_do_first_power_on(struct mdm_ctrl *mdm)
struct device *dev = mdm->dev;
dev_dbg(dev, "Powering on modem for the first time\n");
+ if (mdm->esoc->auto_boot)
+ return 0;
+
mdm_toggle_soft_reset(mdm, false);
/* Add a delay to allow PON sequence to complete*/
msleep(50);
@@ -134,6 +137,9 @@ static int mdm9x55_power_down(struct mdm_ctrl *mdm)
static void mdm4x_cold_reset(struct mdm_ctrl *mdm)
{
+ if (!gpio_is_valid(MDM_GPIO(mdm, AP2MDM_SOFT_RESET)))
+ return;
+
dev_dbg(mdm->dev, "Triggering mdm cold reset");
gpio_direction_output(MDM_GPIO(mdm, AP2MDM_SOFT_RESET),
!!mdm->soft_reset_inverted);
diff --git a/drivers/esoc/esoc.h b/drivers/esoc/esoc.h
index 86aa1a918dfb..6d9d0aa3272f 100644
--- a/drivers/esoc/esoc.h
+++ b/drivers/esoc/esoc.h
@@ -60,6 +60,9 @@ struct esoc_eng {
* @subsys_desc: descriptor for subsystem restart
* @subsys_dev: ssr device handle.
* @np: device tree node for esoc_clink.
+ * @auto_boot: boots independently.
+ * @primary: primary esoc controls(reset/poweroff) all secondary
+ * esocs, but not otherway around.
*/
struct esoc_clink {
const char *name;
@@ -79,6 +82,8 @@ struct esoc_clink {
struct subsys_desc subsys;
struct subsys_device *subsys_dev;
struct device_node *np;
+ bool auto_boot;
+ bool primary;
};
/**
generated by cgit v1.2.3 (git 2.25.1) at 2026-06-12 09:08:00 +0000