From d2ccde1c8e90d38cee87a1b0309ad2827f3fd30d Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Mon, 11 Dec 2023 02:45:28 +0000
Subject: [PATCH] add boot partition size
---
kernel/drivers/gnss/sirf.c | 238 ++++++++++++++++++++++++++++++++++++++++++++++++++---------
1 files changed, 202 insertions(+), 36 deletions(-)
diff --git a/kernel/drivers/gnss/sirf.c b/kernel/drivers/gnss/sirf.c
index 3e88e79..2ecb1d3 100644
--- a/kernel/drivers/gnss/sirf.c
+++ b/kernel/drivers/gnss/sirf.c
@@ -25,18 +25,65 @@
#define SIRF_ON_OFF_PULSE_TIME 100
#define SIRF_ACTIVATE_TIMEOUT 200
#define SIRF_HIBERNATE_TIMEOUT 200
+/*
+ * If no data arrives for this time, we assume that the chip is off.
+ * REVISIT: The report cycle is configurable and can be several minutes long,
+ * so this will only work reliably if the report cycle is set to a reasonable
+ * low value. Also power saving settings (like send data only on movement)
+ * might things work even worse.
+ * Workaround might be to parse shutdown or bootup messages.
+ */
+#define SIRF_REPORT_CYCLE 2000
struct sirf_data {
struct gnss_device *gdev;
struct serdev_device *serdev;
speed_t speed;
struct regulator *vcc;
+ struct regulator *lna;
struct gpio_desc *on_off;
struct gpio_desc *wakeup;
int irq;
bool active;
+
+ struct mutex gdev_mutex;
+ bool open;
+
+ struct mutex serdev_mutex;
+ int serdev_count;
+
wait_queue_head_t power_wait;
};
+
+static int sirf_serdev_open(struct sirf_data *data)
+{
+ int ret = 0;
+
+ mutex_lock(&data->serdev_mutex);
+ if (++data->serdev_count == 1) {
+ ret = serdev_device_open(data->serdev);
+ if (ret) {
+ data->serdev_count--;
+ goto out_unlock;
+ }
+
+ serdev_device_set_baudrate(data->serdev, data->speed);
+ serdev_device_set_flow_control(data->serdev, false);
+ }
+
+out_unlock:
+ mutex_unlock(&data->serdev_mutex);
+
+ return ret;
+}
+
+static void sirf_serdev_close(struct sirf_data *data)
+{
+ mutex_lock(&data->serdev_mutex);
+ if (--data->serdev_count == 0)
+ serdev_device_close(data->serdev);
+ mutex_unlock(&data->serdev_mutex);
+}
static int sirf_open(struct gnss_device *gdev)
{
@@ -44,12 +91,17 @@
struct serdev_device *serdev = data->serdev;
int ret;
- ret = serdev_device_open(serdev);
- if (ret)
- return ret;
+ mutex_lock(&data->gdev_mutex);
+ data->open = true;
+ mutex_unlock(&data->gdev_mutex);
- serdev_device_set_baudrate(serdev, data->speed);
- serdev_device_set_flow_control(serdev, false);
+ ret = sirf_serdev_open(data);
+ if (ret) {
+ mutex_lock(&data->gdev_mutex);
+ data->open = false;
+ mutex_unlock(&data->gdev_mutex);
+ return ret;
+ }
ret = pm_runtime_get_sync(&serdev->dev);
if (ret < 0) {
@@ -61,7 +113,11 @@
return 0;
err_close:
- serdev_device_close(serdev);
+ sirf_serdev_close(data);
+
+ mutex_lock(&data->gdev_mutex);
+ data->open = false;
+ mutex_unlock(&data->gdev_mutex);
return ret;
}
@@ -71,9 +127,13 @@
struct sirf_data *data = gnss_get_drvdata(gdev);
struct serdev_device *serdev = data->serdev;
- serdev_device_close(serdev);
+ sirf_serdev_close(data);
pm_runtime_put(&serdev->dev);
+
+ mutex_lock(&data->gdev_mutex);
+ data->open = false;
+ mutex_unlock(&data->gdev_mutex);
}
static int sirf_write_raw(struct gnss_device *gdev, const unsigned char *buf,
@@ -85,7 +145,7 @@
/* write is only buffered synchronously */
ret = serdev_device_write(serdev, buf, count, MAX_SCHEDULE_TIMEOUT);
- if (ret < 0)
+ if (ret < 0 || ret < count)
return ret;
/* FIXME: determine if interrupted? */
@@ -105,8 +165,19 @@
{
struct sirf_data *data = serdev_device_get_drvdata(serdev);
struct gnss_device *gdev = data->gdev;
+ int ret = 0;
- return gnss_insert_raw(gdev, buf, count);
+ if (!data->wakeup && !data->active) {
+ data->active = true;
+ wake_up_interruptible(&data->power_wait);
+ }
+
+ mutex_lock(&data->gdev_mutex);
+ if (data->open)
+ ret = gnss_insert_raw(gdev, buf, count);
+ mutex_unlock(&data->gdev_mutex);
+
+ return ret;
}
static const struct serdev_device_ops sirf_serdev_ops = {
@@ -125,16 +196,44 @@
if (ret < 0)
goto out;
- data->active = !!ret;
+ data->active = ret;
wake_up_interruptible(&data->power_wait);
out:
return IRQ_HANDLED;
+}
+
+static int sirf_wait_for_power_state_nowakeup(struct sirf_data *data,
+ bool active,
+ unsigned long timeout)
+{
+ int ret;
+
+ /* Wait for state change (including any shutdown messages). */
+ msleep(timeout);
+
+ /* Wait for data reception or timeout. */
+ data->active = false;
+ ret = wait_event_interruptible_timeout(data->power_wait,
+ data->active, msecs_to_jiffies(SIRF_REPORT_CYCLE));
+ if (ret < 0)
+ return ret;
+
+ if (ret > 0 && !active)
+ return -ETIMEDOUT;
+
+ if (ret == 0 && active)
+ return -ETIMEDOUT;
+
+ return 0;
}
static int sirf_wait_for_power_state(struct sirf_data *data, bool active,
unsigned long timeout)
{
int ret;
+
+ if (!data->wakeup)
+ return sirf_wait_for_power_state_nowakeup(data, active, timeout);
ret = wait_event_interruptible_timeout(data->power_wait,
data->active == active, msecs_to_jiffies(timeout));
@@ -168,21 +267,22 @@
else
timeout = SIRF_HIBERNATE_TIMEOUT;
+ if (!data->wakeup) {
+ ret = sirf_serdev_open(data);
+ if (ret)
+ return ret;
+ }
+
do {
sirf_pulse_on_off(data);
ret = sirf_wait_for_power_state(data, active, timeout);
- if (ret < 0) {
- if (ret == -ETIMEDOUT)
- continue;
+ } while (ret == -ETIMEDOUT && retries--);
- return ret;
- }
+ if (!data->wakeup)
+ sirf_serdev_close(data);
- break;
- } while (retries--);
-
- if (retries < 0)
- return -ETIMEDOUT;
+ if (ret)
+ return ret;
return 0;
}
@@ -190,21 +290,60 @@
static int sirf_runtime_suspend(struct device *dev)
{
struct sirf_data *data = dev_get_drvdata(dev);
+ int ret2;
+ int ret;
- if (!data->on_off)
- return regulator_disable(data->vcc);
+ if (data->on_off)
+ ret = sirf_set_active(data, false);
+ else
+ ret = regulator_disable(data->vcc);
- return sirf_set_active(data, false);
+ if (ret)
+ return ret;
+
+ ret = regulator_disable(data->lna);
+ if (ret)
+ goto err_reenable;
+
+ return 0;
+
+err_reenable:
+ if (data->on_off)
+ ret2 = sirf_set_active(data, true);
+ else
+ ret2 = regulator_enable(data->vcc);
+
+ if (ret2)
+ dev_err(dev,
+ "failed to reenable power on failed suspend: %d\n",
+ ret2);
+
+ return ret;
}
static int sirf_runtime_resume(struct device *dev)
{
struct sirf_data *data = dev_get_drvdata(dev);
+ int ret;
- if (!data->on_off)
- return regulator_enable(data->vcc);
+ ret = regulator_enable(data->lna);
+ if (ret)
+ return ret;
- return sirf_set_active(data, true);
+ if (data->on_off)
+ ret = sirf_set_active(data, true);
+ else
+ ret = regulator_enable(data->vcc);
+
+ if (ret)
+ goto err_disable_lna;
+
+ return 0;
+
+err_disable_lna:
+ regulator_disable(data->lna);
+
+ return ret;
}
static int __maybe_unused sirf_suspend(struct device *dev)
@@ -275,6 +414,8 @@
data->serdev = serdev;
data->gdev = gdev;
+ mutex_init(&data->gdev_mutex);
+ mutex_init(&data->serdev_mutex);
init_waitqueue_head(&data->power_wait);
serdev_device_set_drvdata(serdev, data);
@@ -287,6 +428,12 @@
data->vcc = devm_regulator_get(dev, "vcc");
if (IS_ERR(data->vcc)) {
ret = PTR_ERR(data->vcc);
+ goto err_put_device;
+ }
+
+ data->lna = devm_regulator_get(dev, "lna");
+ if (IS_ERR(data->lna)) {
+ ret = PTR_ERR(data->lna);
goto err_put_device;
}
@@ -305,16 +452,6 @@
goto err_put_device;
}
- /*
- * Configurations where WAKEUP has been left not connected,
- * are currently not supported.
- */
- if (!data->wakeup) {
- dev_err(dev, "no wakeup gpio specified\n");
- ret = -ENODEV;
- goto err_put_device;
- }
-
ret = regulator_enable(data->vcc);
if (ret)
goto err_put_device;
@@ -324,6 +461,11 @@
}
if (data->wakeup) {
+ ret = gpiod_get_value_cansleep(data->wakeup);
+ if (ret < 0)
+ goto err_disable_vcc;
+ data->active = ret;
+
ret = gpiod_to_irq(data->wakeup);
if (ret < 0)
goto err_disable_vcc;
@@ -334,6 +476,29 @@
"wakeup", data);
if (ret)
goto err_disable_vcc;
+ }
+
+ if (data->on_off) {
+ if (!data->wakeup) {
+ data->active = false;
+
+ ret = sirf_serdev_open(data);
+ if (ret)
+ goto err_disable_vcc;
+
+ msleep(SIRF_REPORT_CYCLE);
+ sirf_serdev_close(data);
+ }
+
+ /* Force hibernate mode if already active. */
+ if (data->active) {
+ ret = sirf_set_active(data, false);
+ if (ret) {
+ dev_err(dev, "failed to set hibernate mode: %d\n",
+ ret);
+ goto err_free_irq;
+ }
+ }
}
if (IS_ENABLED(CONFIG_PM)) {
@@ -392,6 +557,7 @@
static const struct of_device_id sirf_of_match[] = {
{ .compatible = "fastrax,uc430" },
{ .compatible = "linx,r4" },
+ { .compatible = "wi2wi,w2sg0004" },
{ .compatible = "wi2wi,w2sg0008i" },
{ .compatible = "wi2wi,w2sg0084i" },
{},
--
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