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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.c109
1 files changed, 44 insertions, 65 deletions
diff --git a/drivers/misc/ti-st/st_kim.c b/drivers/misc/ti-st/st_kim.c
index 7c14f8fd98db..04a819944f6b 100644
--- a/drivers/misc/ti-st/st_kim.c
+++ b/drivers/misc/ti-st/st_kim.c
@@ -63,10 +63,27 @@ static struct platform_device *st_get_plat_device(int id)
* in case of error don't complete so that waiting for proper
* response times out
*/
-void validate_firmware_response(struct kim_data_s *kim_gdata)
+static void validate_firmware_response(struct kim_data_s *kim_gdata)
{
struct sk_buff *skb = kim_gdata->rx_skb;
- if (unlikely(skb->data[5] != 0)) {
+ if (!skb)
+ return;
+
+ /* these magic numbers are the position in the response buffer which
+ * allows us to distinguish whether the response is for the read
+ * version info. command
+ */
+ if (skb->data[2] == 0x01 && skb->data[3] == 0x01 &&
+ skb->data[4] == 0x10 && skb->data[5] == 0x00) {
+ /* fw version response */
+ memcpy(kim_gdata->resp_buffer,
+ kim_gdata->rx_skb->data,
+ kim_gdata->rx_skb->len);
+ complete_all(&kim_gdata->kim_rcvd);
+ kim_gdata->rx_state = ST_W4_PACKET_TYPE;
+ kim_gdata->rx_skb = NULL;
+ kim_gdata->rx_count = 0;
+ } else if (unlikely(skb->data[5] != 0)) {
pr_err("no proper response during fw download");
pr_err("data6 %x", skb->data[5]);
kfree_skb(skb);
@@ -119,7 +136,7 @@ static inline int kim_check_data_len(struct kim_data_s *kim_gdata, int len)
* have been observed to come in bursts of different
* tty_receive and hence the logic
*/
-void kim_int_recv(struct kim_data_s *kim_gdata,
+static void kim_int_recv(struct kim_data_s *kim_gdata,
const unsigned char *data, long count)
{
const unsigned char *ptr;
@@ -207,16 +224,19 @@ static long read_local_version(struct kim_data_s *kim_gdata, char *bts_scr_name)
return -EIO;
}
- if (!wait_for_completion_timeout
- (&kim_gdata->kim_rcvd, msecs_to_jiffies(CMD_RESP_TIME))) {
+ if (!wait_for_completion_interruptible_timeout(
+ &kim_gdata->kim_rcvd, msecs_to_jiffies(CMD_RESP_TIME))) {
pr_err(" waiting for ver info- timed out ");
return -ETIMEDOUT;
}
INIT_COMPLETION(kim_gdata->kim_rcvd);
+ /* the positions 12 & 13 in the response buffer provide with the
+ * chip, major & minor numbers
+ */
version =
- MAKEWORD(kim_gdata->resp_buffer[13],
- kim_gdata->resp_buffer[14]);
+ MAKEWORD(kim_gdata->resp_buffer[12],
+ kim_gdata->resp_buffer[13]);
chip = (version & 0x7C00) >> 10;
min_ver = (version & 0x007F);
maj_ver = (version & 0x0380) >> 7;
@@ -236,7 +256,7 @@ static long read_local_version(struct kim_data_s *kim_gdata, char *bts_scr_name)
return 0;
}
-void skip_change_remote_baud(unsigned char **ptr, long *len)
+static void skip_change_remote_baud(unsigned char **ptr, long *len)
{
unsigned char *nxt_action, *cur_action;
cur_action = *ptr;
@@ -370,9 +390,9 @@ static long download_firmware(struct kim_data_s *kim_gdata)
break;
case ACTION_WAIT_EVENT: /* wait */
pr_debug("W");
- if (!wait_for_completion_timeout
- (&kim_gdata->kim_rcvd,
- msecs_to_jiffies(CMD_RESP_TIME))) {
+ if (!wait_for_completion_interruptible_timeout(
+ &kim_gdata->kim_rcvd,
+ msecs_to_jiffies(CMD_RESP_TIME))) {
pr_err("response timeout during fw download ");
/* timed out */
release_firmware(kim_gdata->fw_entry);
@@ -410,16 +430,10 @@ void st_kim_recv(void *disc_data, const unsigned char *data, long count)
struct st_data_s *st_gdata = (struct st_data_s *)disc_data;
struct kim_data_s *kim_gdata = st_gdata->kim_data;
- /* copy to local buffer */
- if (unlikely(data[4] == 0x01 && data[5] == 0x10 && data[0] == 0x04)) {
- /* must be the read_ver_cmd */
- memcpy(kim_gdata->resp_buffer, data, count);
- complete_all(&kim_gdata->kim_rcvd);
- return;
- } else {
- kim_int_recv(kim_gdata, data, count);
- /* either completes or times out */
- }
+ /* proceed to gather all data and distinguish read fw version response
+ * from other fw responses when data gathering is complete
+ */
+ kim_int_recv(kim_gdata, data, count);
return;
}
@@ -454,11 +468,6 @@ 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);
/* send notification to UIM */
@@ -467,8 +476,8 @@ long st_kim_start(void *kim_data)
sysfs_notify(&kim_gdata->kim_pdev->dev.kobj,
NULL, "install");
/* wait for ldisc to be installed */
- err = wait_for_completion_timeout(&kim_gdata->ldisc_installed,
- msecs_to_jiffies(LDISC_TIME));
+ err = wait_for_completion_interruptible_timeout(
+ &kim_gdata->ldisc_installed, msecs_to_jiffies(LDISC_TIME));
if (!err) {
/* ldisc installation timeout,
* flush uart, power cycle BT_EN */
@@ -500,8 +509,7 @@ 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) reset BT_EN - pull down nshutdown at the end.
- * (d) invoke platform's chip disabling routine.
+ * (c) invoke platform's chip disabling routine.
*/
long st_kim_stop(void *kim_data)
{
@@ -526,20 +534,13 @@ long st_kim_stop(void *kim_data)
sysfs_notify(&kim_gdata->kim_pdev->dev.kobj, NULL, "install");
/* wait for ldisc to be un-installed */
- err = wait_for_completion_timeout(&kim_gdata->ldisc_installed,
- msecs_to_jiffies(LDISC_TIME));
+ err = wait_for_completion_interruptible_timeout(
+ &kim_gdata->ldisc_installed, msecs_to_jiffies(LDISC_TIME));
if (!err) { /* timeout */
pr_err(" timed out waiting for ldisc to be un-installed");
- return -ETIMEDOUT;
+ 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);
@@ -701,7 +702,7 @@ static const struct file_operations list_debugfs_fops = {
* board-*.c file
*/
-struct dentry *kim_debugfs_dir;
+static struct dentry *kim_debugfs_dir;
static int kim_probe(struct platform_device *pdev)
{
long status;
@@ -731,20 +732,6 @@ static int kim_probe(struct platform_device *pdev)
/* 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;
- status = gpio_request(kim_gdata->nshutdown, "kim");
- if (unlikely(status)) {
- pr_err(" gpio %ld request failed ", kim_gdata->nshutdown);
- return status;
- }
-
- /* Configure nShutdown GPIO as output=0 */
- status = gpio_direction_output(kim_gdata->nshutdown, 0);
- if (unlikely(status)) {
- pr_err(" unable to configure gpio %ld", kim_gdata->nshutdown);
- return status;
- }
/* get reference of pdev for request_firmware
*/
kim_gdata->kim_pdev = pdev;
@@ -780,18 +767,10 @@ static int kim_probe(struct platform_device *pdev)
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);
- /* 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);
pr_info("sysfs entries removed");
@@ -804,7 +783,7 @@ static int kim_remove(struct platform_device *pdev)
return 0;
}
-int kim_suspend(struct platform_device *pdev, pm_message_t state)
+static int kim_suspend(struct platform_device *pdev, pm_message_t state)
{
struct ti_st_plat_data *pdata = pdev->dev.platform_data;
@@ -814,7 +793,7 @@ int kim_suspend(struct platform_device *pdev, pm_message_t state)
return -EOPNOTSUPP;
}
-int kim_resume(struct platform_device *pdev)
+static int kim_resume(struct platform_device *pdev)
{
struct ti_st_plat_data *pdata = pdev->dev.platform_data;
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.