coresight: add coresight fuse state query

Add support to query CoreSight fuse state and fail the probe
if any of the required fuse(s) are disabled. This enables
a single image with CoreSight drivers compiled in to be run on
both Hardware that has CoreSight functionality disabled via fuse
or left enabled for use.

Change-Id: Ib770cc7f76e2b0644bda9600c92fc3a26823452d
Signed-off-by: Pratik Patel <pratikp@codeaurora.org>

drivers/coresight/coresight-csr.c

@@ -168,6 +168,9 @@ static int __devinit csr_probe(struct platform_device *pdev)
 	struct resource *res;
 	struct coresight_desc *desc;
 
+	if (coresight_fuse_access_disabled())
+		return -EPERM;
+
 	if (pdev->dev.of_node) {
 		pdata = of_get_coresight_platform_data(dev, pdev->dev.of_node);
 		if (IS_ERR(pdata))

drivers/coresight/coresight-cti.c

@@ -388,6 +388,9 @@ static int __devinit cti_probe(struct platform_device *pdev)
 	struct resource *res;
 	struct coresight_desc *desc;
 
+	if (coresight_fuse_access_disabled())
+		return -EPERM;
+
 	if (pdev->dev.of_node) {
 		pdata = of_get_coresight_platform_data(dev, pdev->dev.of_node);
 		if (IS_ERR(pdata))

drivers/coresight/coresight-etb.c

@@ -362,6 +362,9 @@ static int __devinit etb_probe(struct platform_device *pdev)
 	struct resource *res;
 	struct coresight_desc *desc;
 
+	if (coresight_fuse_access_disabled())
+		return -EPERM;
+
 	if (pdev->dev.of_node) {
 		pdata = of_get_coresight_platform_data(dev, pdev->dev.of_node);
 		if (IS_ERR(pdata))

drivers/coresight/coresight-etm.c

@@ -2113,6 +2113,10 @@ static int __devinit etm_probe(struct platform_device *pdev)
 	struct msm_client_dump dump;
 	struct coresight_desc *desc;
 
+	if (coresight_fuse_access_disabled() ||
+	    coresight_fuse_apps_access_disabled())
+		return -EPERM;
+
 	if (pdev->dev.of_node) {
 		pdata = of_get_coresight_platform_data(dev, pdev->dev.of_node);
 		if (IS_ERR(pdata))

drivers/coresight/coresight-funnel.c

@@ -174,6 +174,9 @@ static int __devinit funnel_probe(struct platform_device *pdev)
 	struct resource *res;
 	struct coresight_desc *desc;
 
+	if (coresight_fuse_access_disabled())
+		return -EPERM;
+
 	if (pdev->dev.of_node) {
 		pdata = of_get_coresight_platform_data(dev, pdev->dev.of_node);
 		if (IS_ERR(pdata))

drivers/coresight/coresight-hwevent.c

@@ -211,6 +211,9 @@ static int __devinit hwevent_probe(struct platform_device *pdev)
 	int ret, i;
 	const char *hmux_name, *hclk_name;
 
+	if (coresight_fuse_access_disabled())
+		return -EPERM;
+
 	if (pdev->dev.of_node) {
 		pdata = of_get_coresight_platform_data(dev, pdev->dev.of_node);
 		if (IS_ERR(pdata))

drivers/coresight/coresight-replicator.c

@@ -126,6 +126,9 @@ static int __devinit replicator_probe(struct platform_device *pdev)
 	struct resource *res;
 	struct coresight_desc *desc;
 
+	if (coresight_fuse_access_disabled())
+		return -EPERM;
+
 	if (pdev->dev.of_node) {
 		pdata = of_get_coresight_platform_data(dev, pdev->dev.of_node);
 		if (IS_ERR(pdata))

drivers/coresight/coresight-stm.c

@@ -791,6 +791,9 @@ static int __devinit stm_probe(struct platform_device *pdev)
 	size_t res_size, bitmap_size;
 	struct coresight_desc *desc;
 
+	if (coresight_fuse_access_disabled())
+		return -EPERM;
+
 	if (pdev->dev.of_node) {
 		pdata = of_get_coresight_platform_data(dev, pdev->dev.of_node);
 		if (IS_ERR(pdata))

drivers/coresight/coresight-tmc.c

@@ -1134,6 +1134,9 @@ static int __devinit tmc_probe(struct platform_device *pdev)
 	struct coresight_cti_data *ctidata;
 	struct coresight_desc *desc;
 
+	if (coresight_fuse_access_disabled())
+		return -EPERM;
+
 	if (pdev->dev.of_node) {
 		pdata = of_get_coresight_platform_data(dev, pdev->dev.of_node);
 		if (IS_ERR(pdata))

drivers/coresight/coresight-tpiu.c

@@ -717,6 +717,9 @@ static int __devinit tpiu_probe(struct platform_device *pdev)
 	struct resource *res;
 	struct coresight_desc *desc;
 
+	if (coresight_fuse_access_disabled())
+		return -EPERM;
+
 	if (pdev->dev.of_node) {
 		pdata = of_get_coresight_platform_data(dev, pdev->dev.of_node);
 		if (IS_ERR(pdata))