tsif: Add option to inverse tsif signals
TSIF signals (clock, data, enable and sync) may be configured
to be inversed at TSIF unit input. This is useful in case
TSIF signals from external units need to be inversed.
Change-Id: I21a5c8eca73df0f4458c0d035ef8ae90920ea0c5
Signed-off-by: Hamad Kadmany <hkadmany@codeaurora.org>
diff --git a/drivers/misc/tsif.c b/drivers/misc/tsif.c
index 1ff4468..b7b1203 100644
--- a/drivers/misc/tsif.c
+++ b/drivers/misc/tsif.c
@@ -140,6 +140,10 @@
unsigned int irq;
int mode;
u32 time_limit;
+ int clock_inverse;
+ int data_inverse;
+ int sync_inverse;
+ int enable_inverse;
enum tsif_state state;
struct wake_lock wake_lock;
/* clocks */
@@ -358,6 +362,19 @@
TSIF_STS_CTL_EN_TIME_LIM |
TSIF_STS_CTL_EN_TCR |
TSIF_STS_CTL_EN_DM;
+
+ if (tsif_device->clock_inverse)
+ ctl |= TSIF_STS_CTL_INV_CLOCK;
+
+ if (tsif_device->data_inverse)
+ ctl |= TSIF_STS_CTL_INV_DATA;
+
+ if (tsif_device->sync_inverse)
+ ctl |= TSIF_STS_CTL_INV_SYNC;
+
+ if (tsif_device->enable_inverse)
+ ctl |= TSIF_STS_CTL_INV_ENABLE;
+
dev_info(&tsif_device->pdev->dev, "%s\n", __func__);
switch (tsif_device->mode) {
case 1: /* mode 1 */
@@ -805,6 +822,10 @@
"Client = %p\n"
"Pkt/Buf = %d\n"
"Pkt/chunk = %d\n"
+ "Clock inv = %d\n"
+ "Data inv = %d\n"
+ "Sync inv = %d\n"
+ "Enable inv = %d\n"
"--statistics--\n"
"Rx chunks = %d\n"
"Overflow = %d\n"
@@ -827,6 +848,10 @@
tsif_device->client_data,
TSIF_PKTS_IN_BUF,
TSIF_PKTS_IN_CHUNK,
+ tsif_device->clock_inverse,
+ tsif_device->data_inverse,
+ tsif_device->sync_inverse,
+ tsif_device->enable_inverse,
tsif_device->stat_rx,
tsif_device->stat_overflow,
tsif_device->stat_lost_sync,
@@ -950,11 +975,120 @@
static DEVICE_ATTR(buf_config, S_IRUGO | S_IWUSR,
show_buf_config, set_buf_config);
+static ssize_t show_clk_inverse(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct msm_tsif_device *tsif_device = dev_get_drvdata(dev);
+ return snprintf(buf, PAGE_SIZE, "%d\n", tsif_device->clock_inverse);
+}
+
+static ssize_t set_clk_inverse(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t count)
+{
+ struct msm_tsif_device *tsif_device = dev_get_drvdata(dev);
+ int value;
+ int rc;
+ if (1 != sscanf(buf, "%d", &value)) {
+ dev_err(&tsif_device->pdev->dev,
+ "Failed to parse integer: <%s>\n", buf);
+ return -EINVAL;
+ }
+ rc = tsif_set_clk_inverse(tsif_device, value);
+ if (!rc)
+ rc = count;
+ return rc;
+}
+static DEVICE_ATTR(clk_inverse, S_IRUGO | S_IWUSR,
+ show_clk_inverse, set_clk_inverse);
+
+static ssize_t show_data_inverse(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct msm_tsif_device *tsif_device = dev_get_drvdata(dev);
+ return snprintf(buf, PAGE_SIZE, "%d\n", tsif_device->data_inverse);
+}
+
+static ssize_t set_data_inverse(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t count)
+{
+ struct msm_tsif_device *tsif_device = dev_get_drvdata(dev);
+ int value;
+ int rc;
+ if (1 != sscanf(buf, "%d", &value)) {
+ dev_err(&tsif_device->pdev->dev,
+ "Failed to parse integer: <%s>\n", buf);
+ return -EINVAL;
+ }
+ rc = tsif_set_data_inverse(tsif_device, value);
+ if (!rc)
+ rc = count;
+ return rc;
+}
+static DEVICE_ATTR(data_inverse, S_IRUGO | S_IWUSR,
+ show_data_inverse, set_data_inverse);
+
+static ssize_t show_sync_inverse(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct msm_tsif_device *tsif_device = dev_get_drvdata(dev);
+ return snprintf(buf, PAGE_SIZE, "%d\n", tsif_device->sync_inverse);
+}
+
+static ssize_t set_sync_inverse(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t count)
+{
+ struct msm_tsif_device *tsif_device = dev_get_drvdata(dev);
+ int value;
+ int rc;
+ if (1 != sscanf(buf, "%d", &value)) {
+ dev_err(&tsif_device->pdev->dev,
+ "Failed to parse integer: <%s>\n", buf);
+ return -EINVAL;
+ }
+ rc = tsif_set_sync_inverse(tsif_device, value);
+ if (!rc)
+ rc = count;
+ return rc;
+}
+static DEVICE_ATTR(sync_inverse, S_IRUGO | S_IWUSR,
+ show_sync_inverse, set_sync_inverse);
+
+static ssize_t show_enable_inverse(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct msm_tsif_device *tsif_device = dev_get_drvdata(dev);
+ return snprintf(buf, PAGE_SIZE, "%d\n", tsif_device->enable_inverse);
+}
+
+static ssize_t set_enable_inverse(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t count)
+{
+ struct msm_tsif_device *tsif_device = dev_get_drvdata(dev);
+ int value;
+ int rc;
+ if (1 != sscanf(buf, "%d", &value)) {
+ dev_err(&tsif_device->pdev->dev,
+ "Failed to parse integer: <%s>\n", buf);
+ return -EINVAL;
+ }
+ rc = tsif_set_enable_inverse(tsif_device, value);
+ if (!rc)
+ rc = count;
+ return rc;
+}
+static DEVICE_ATTR(enable_inverse, S_IRUGO | S_IWUSR,
+ show_enable_inverse, set_enable_inverse);
+
+
static struct attribute *dev_attrs[] = {
&dev_attr_stats.attr,
&dev_attr_mode.attr,
&dev_attr_time_limit.attr,
&dev_attr_buf_config.attr,
+ &dev_attr_clk_inverse.attr,
+ &dev_attr_data_inverse.attr,
+ &dev_attr_sync_inverse.attr,
+ &dev_attr_enable_inverse.attr,
NULL,
};
static struct attribute_group dev_attr_grp = {
@@ -1287,6 +1421,10 @@
tsif_device->pdev = pdev;
platform_set_drvdata(pdev, tsif_device);
tsif_device->mode = 1;
+ tsif_device->clock_inverse = 0;
+ tsif_device->data_inverse = 0;
+ tsif_device->sync_inverse = 0;
+ tsif_device->enable_inverse = 0;
tsif_device->pkts_per_chunk = TSIF_PKTS_IN_CHUNK_DEFAULT;
tsif_device->chunks_per_buf = TSIF_CHUNKS_IN_BUF_DEFAULT;
tasklet_init(&tsif_device->dma_refill, tsif_dma_refill,
@@ -1534,6 +1672,78 @@
}
EXPORT_SYMBOL(tsif_set_buf_config);
+int tsif_set_clk_inverse(void *cookie, int value)
+{
+ struct msm_tsif_device *tsif_device = cookie;
+ if (tsif_device->state != tsif_state_stopped) {
+ dev_err(&tsif_device->pdev->dev,
+ "Can't change clock inverse while device is active\n");
+ return -EBUSY;
+ }
+ if ((value != 0) && (value != 1)) {
+ dev_err(&tsif_device->pdev->dev,
+ "Invalid parameter, either 0 or 1: %#x\n", value);
+ return -EINVAL;
+ }
+ tsif_device->clock_inverse = value;
+ return 0;
+}
+EXPORT_SYMBOL(tsif_set_clk_inverse);
+
+int tsif_set_data_inverse(void *cookie, int value)
+{
+ struct msm_tsif_device *tsif_device = cookie;
+ if (tsif_device->state != tsif_state_stopped) {
+ dev_err(&tsif_device->pdev->dev,
+ "Can't change data inverse while device is active\n");
+ return -EBUSY;
+ }
+ if ((value != 0) && (value != 1)) {
+ dev_err(&tsif_device->pdev->dev,
+ "Invalid parameter, either 0 or 1: %#x\n", value);
+ return -EINVAL;
+ }
+ tsif_device->data_inverse = value;
+ return 0;
+}
+EXPORT_SYMBOL(tsif_set_data_inverse);
+
+int tsif_set_sync_inverse(void *cookie, int value)
+{
+ struct msm_tsif_device *tsif_device = cookie;
+ if (tsif_device->state != tsif_state_stopped) {
+ dev_err(&tsif_device->pdev->dev,
+ "Can't change sync inverse while device is active\n");
+ return -EBUSY;
+ }
+ if ((value != 0) && (value != 1)) {
+ dev_err(&tsif_device->pdev->dev,
+ "Invalid parameter, either 0 or 1: %#x\n", value);
+ return -EINVAL;
+ }
+ tsif_device->sync_inverse = value;
+ return 0;
+}
+EXPORT_SYMBOL(tsif_set_sync_inverse);
+
+int tsif_set_enable_inverse(void *cookie, int value)
+{
+ struct msm_tsif_device *tsif_device = cookie;
+ if (tsif_device->state != tsif_state_stopped) {
+ dev_err(&tsif_device->pdev->dev,
+ "Can't change enable inverse while device is active\n");
+ return -EBUSY;
+ }
+ if ((value != 0) && (value != 1)) {
+ dev_err(&tsif_device->pdev->dev,
+ "Invalid parameter, either 0 or 1: %#x\n", value);
+ return -EINVAL;
+ }
+ tsif_device->enable_inverse = value;
+ return 0;
+}
+EXPORT_SYMBOL(tsif_set_enable_inverse);
+
void tsif_get_state(void *cookie, int *ri, int *wi, enum tsif_state *state)
{
struct msm_tsif_device *tsif_device = cookie;