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path: root/drivers/misc/ti-st/st_kim.c
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Diffstat (limited to 'drivers/misc/ti-st/st_kim.c')
-rw-r--r--drivers/misc/ti-st/st_kim.c86
1 files changed, 66 insertions, 20 deletions
diff --git a/drivers/misc/ti-st/st_kim.c b/drivers/misc/ti-st/st_kim.c
index 04a819944f6..9d3dbb28734 100644
--- a/drivers/misc/ti-st/st_kim.c
+++ b/drivers/misc/ti-st/st_kim.c
@@ -218,7 +218,7 @@ static long read_local_version(struct kim_data_s *kim_gdata, char *bts_scr_name)
pr_debug("%s", __func__);
- INIT_COMPLETION(kim_gdata->kim_rcvd);
+ reinit_completion(&kim_gdata->kim_rcvd);
if (4 != st_int_write(kim_gdata->core_data, read_ver_cmd, 4)) {
pr_err("kim: couldn't write 4 bytes");
return -EIO;
@@ -229,7 +229,7 @@ static long read_local_version(struct kim_data_s *kim_gdata, char *bts_scr_name)
pr_err(" waiting for ver info- timed out ");
return -ETIMEDOUT;
}
- INIT_COMPLETION(kim_gdata->kim_rcvd);
+ reinit_completion(&kim_gdata->kim_rcvd);
/* the positions 12 & 13 in the response buffer provide with the
* chip, major & minor numbers
*/
@@ -362,7 +362,7 @@ static long download_firmware(struct kim_data_s *kim_gdata)
/* reinit completion before sending for the
* relevant wait
*/
- INIT_COMPLETION(kim_gdata->kim_rcvd);
+ reinit_completion(&kim_gdata->kim_rcvd);
/*
* Free space found in uart buffer, call st_int_write
@@ -398,7 +398,7 @@ static long download_firmware(struct kim_data_s *kim_gdata)
release_firmware(kim_gdata->fw_entry);
return -ETIMEDOUT;
}
- INIT_COMPLETION(kim_gdata->kim_rcvd);
+ reinit_completion(&kim_gdata->kim_rcvd);
break;
case ACTION_DELAY: /* sleep */
pr_info("sleep command in scr");
@@ -468,8 +468,13 @@ long st_kim_start(void *kim_data)
if (pdata->chip_enable)
pdata->chip_enable(kim_gdata);
+ /* Configure BT nShutdown to HIGH state */
+ gpio_set_value(kim_gdata->nshutdown, GPIO_LOW);
+ mdelay(5); /* FIXME: a proper toggle */
+ gpio_set_value(kim_gdata->nshutdown, GPIO_HIGH);
+ mdelay(100);
/* re-initialize the completion */
- INIT_COMPLETION(kim_gdata->ldisc_installed);
+ reinit_completion(&kim_gdata->ldisc_installed);
/* send notification to UIM */
kim_gdata->ldisc_install = 1;
pr_info("ldisc_install = 1");
@@ -509,7 +514,8 @@ long st_kim_start(void *kim_data)
* (b) upon failure to either install ldisc or download firmware.
* The function is responsible to (a) notify UIM about un-installation,
* (b) flush UART if the ldisc was installed.
- * (c) invoke platform's chip disabling routine.
+ * (c) reset BT_EN - pull down nshutdown at the end.
+ * (d) invoke platform's chip disabling routine.
*/
long st_kim_stop(void *kim_data)
{
@@ -519,13 +525,12 @@ long st_kim_stop(void *kim_data)
kim_gdata->kim_pdev->dev.platform_data;
struct tty_struct *tty = kim_gdata->core_data->tty;
- INIT_COMPLETION(kim_gdata->ldisc_installed);
+ reinit_completion(&kim_gdata->ldisc_installed);
if (tty) { /* can be called before ldisc is installed */
/* Flush any pending characters in the driver and discipline. */
tty_ldisc_flush(tty);
tty_driver_flush_buffer(tty);
- tty->ops->flush_buffer(tty);
}
/* send uninstall notification to UIM */
@@ -541,6 +546,13 @@ long st_kim_stop(void *kim_data)
err = -ETIMEDOUT;
}
+ /* By default configure BT nShutdown to LOW state */
+ gpio_set_value(kim_gdata->nshutdown, GPIO_LOW);
+ mdelay(1);
+ gpio_set_value(kim_gdata->nshutdown, GPIO_HIGH);
+ mdelay(1);
+ gpio_set_value(kim_gdata->nshutdown, GPIO_LOW);
+
/* platform specific disable */
if (pdata->chip_disable)
pdata->chip_disable(kim_gdata);
@@ -667,7 +679,7 @@ void st_kim_ref(struct st_data_s **core_data, int id)
*core_data = NULL;
return;
}
- kim_gdata = dev_get_drvdata(&pdev->dev);
+ kim_gdata = platform_get_drvdata(pdev);
*core_data = kim_gdata->core_data;
}
@@ -705,9 +717,9 @@ static const struct file_operations list_debugfs_fops = {
static struct dentry *kim_debugfs_dir;
static int kim_probe(struct platform_device *pdev)
{
- long status;
struct kim_data_s *kim_gdata;
struct ti_st_plat_data *pdata = pdev->dev.platform_data;
+ int err;
if ((pdev->id != -1) && (pdev->id < MAX_ST_DEVICES)) {
/* multiple devices could exist */
@@ -722,26 +734,41 @@ static int kim_probe(struct platform_device *pdev)
pr_err("no mem to allocate");
return -ENOMEM;
}
- dev_set_drvdata(&pdev->dev, kim_gdata);
+ platform_set_drvdata(pdev, kim_gdata);
- status = st_core_init(&kim_gdata->core_data);
- if (status != 0) {
+ err = st_core_init(&kim_gdata->core_data);
+ if (err != 0) {
pr_err(" ST core init failed");
- return -EIO;
+ err = -EIO;
+ goto err_core_init;
}
/* refer to itself */
kim_gdata->core_data->kim_data = kim_gdata;
+ /* Claim the chip enable nShutdown gpio from the system */
+ kim_gdata->nshutdown = pdata->nshutdown_gpio;
+ err = gpio_request(kim_gdata->nshutdown, "kim");
+ if (unlikely(err)) {
+ pr_err(" gpio %ld request failed ", kim_gdata->nshutdown);
+ return err;
+ }
+
+ /* Configure nShutdown GPIO as output=0 */
+ err = gpio_direction_output(kim_gdata->nshutdown, 0);
+ if (unlikely(err)) {
+ pr_err(" unable to configure gpio %ld", kim_gdata->nshutdown);
+ return err;
+ }
/* get reference of pdev for request_firmware
*/
kim_gdata->kim_pdev = pdev;
init_completion(&kim_gdata->kim_rcvd);
init_completion(&kim_gdata->ldisc_installed);
- status = sysfs_create_group(&pdev->dev.kobj, &uim_attr_grp);
- if (status) {
+ err = sysfs_create_group(&pdev->dev.kobj, &uim_attr_grp);
+ if (err) {
pr_err("failed to create sysfs entries");
- return status;
+ goto err_sysfs_group;
}
/* copying platform data */
@@ -753,8 +780,8 @@ static int kim_probe(struct platform_device *pdev)
kim_debugfs_dir = debugfs_create_dir("ti-st", NULL);
if (IS_ERR(kim_debugfs_dir)) {
pr_err(" debugfs entries creation failed ");
- kim_debugfs_dir = NULL;
- return -EIO;
+ err = -EIO;
+ goto err_debugfs_dir;
}
debugfs_create_file("version", S_IRUGO, kim_debugfs_dir,
@@ -763,13 +790,32 @@ static int kim_probe(struct platform_device *pdev)
kim_gdata, &list_debugfs_fops);
pr_info(" debugfs entries created ");
return 0;
+
+err_debugfs_dir:
+ sysfs_remove_group(&pdev->dev.kobj, &uim_attr_grp);
+
+err_sysfs_group:
+ st_core_exit(kim_gdata->core_data);
+
+err_core_init:
+ kfree(kim_gdata);
+
+ return err;
}
static int kim_remove(struct platform_device *pdev)
{
+ /* free the GPIOs requested */
+ struct ti_st_plat_data *pdata = pdev->dev.platform_data;
struct kim_data_s *kim_gdata;
- kim_gdata = dev_get_drvdata(&pdev->dev);
+ kim_gdata = platform_get_drvdata(pdev);
+
+ /* Free the Bluetooth/FM/GPIO
+ * nShutdown gpio from the system
+ */
+ gpio_free(pdata->nshutdown_gpio);
+ pr_info("nshutdown GPIO Freed");
debugfs_remove_recursive(kim_debugfs_dir);
sysfs_remove_group(&pdev->dev.kobj, &uim_attr_grp);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-10 06:21:16 +0000