msm: qdss: coresight PFT tracing support
Initial version of the PFT trace driver.
CRs-Fixed: 305958
Signed-off-by: Pratik Patel <pratikp@codeaurora.org>
diff --git a/arch/arm/mach-msm/qdss-tpiu.c b/arch/arm/mach-msm/qdss-tpiu.c
new file mode 100644
index 0000000..def7467
--- /dev/null
+++ b/arch/arm/mach-msm/qdss-tpiu.c
@@ -0,0 +1,138 @@
+/* Copyright (c) 2011, Code Aurora Forum. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/io.h>
+#include <linux/err.h>
+
+#include "qdss.h"
+
+#define tpiu_writel(tpiu, val, off) __raw_writel((val), tpiu.base + off)
+#define tpiu_readl(tpiu, off) __raw_readl(tpiu.base + off)
+
+#define TPIU_SUPPORTED_PORT_SIZE (0x000)
+#define TPIU_CURRENT_PORT_SIZE (0x004)
+#define TPIU_SUPPORTED_TRIGGER_MODES (0x100)
+#define TPIU_TRIGGER_COUNTER_VALUE (0x104)
+#define TPIU_TRIGGER_MULTIPLIER (0x108)
+#define TPIU_SUPPORTED_TEST_PATTERNM (0x200)
+#define TPIU_CURRENT_TEST_PATTERNM (0x204)
+#define TPIU_TEST_PATTERN_REPEAT_COUNTER (0x208)
+#define TPIU_FORMATTER_AND_FLUSH_STATUS (0x300)
+#define TPIU_FORMATTER_AND_FLUSH_CONTROL (0x304)
+#define TPIU_FORMATTER_SYNCHRONIZATION_COUNTER (0x308)
+#define TPIU_EXTCTL_IN_PORT (0x400)
+#define TPIU_EXTCTL_OUT_PORT (0x404)
+#define TPIU_ITTRFLINACK (0xEE4)
+#define TPIU_ITTRFLIN (0xEE8)
+#define TPIU_ITATBDATA0 (0xEEC)
+#define TPIU_ITATBCTR2 (0xEF0)
+#define TPIU_ITATBCTR1 (0xEF4)
+#define TPIU_ITATBCTR0 (0xEF8)
+
+
+#define TPIU_LOCK() \
+do { \
+ mb(); \
+ tpiu_writel(tpiu, MAGIC2, CS_LAR); \
+} while (0)
+#define TPIU_UNLOCK() \
+do { \
+ tpiu_writel(tpiu, MAGIC1, CS_LAR); \
+ mb(); \
+} while (0)
+
+struct tpiu_ctx {
+ void __iomem *base;
+ bool enabled;
+ atomic_t in_use;
+ struct device *dev;
+};
+
+static struct tpiu_ctx tpiu;
+
+static void __tpiu_disable(void)
+{
+ TPIU_UNLOCK();
+
+ tpiu_writel(tpiu, 0x3000, TPIU_FORMATTER_AND_FLUSH_CONTROL);
+ tpiu_writel(tpiu, 0x3040, TPIU_FORMATTER_AND_FLUSH_CONTROL);
+
+ TPIU_LOCK();
+}
+
+void tpiu_disable(void)
+{
+ __tpiu_disable();
+ tpiu.enabled = false;
+ dev_info(tpiu.dev, "tpiu disabled\n");
+}
+
+static int __devinit tpiu_probe(struct platform_device *pdev)
+{
+ int ret;
+ struct resource *res;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ ret = -EINVAL;
+ goto err_res;
+ }
+
+ tpiu.base = ioremap_nocache(res->start, resource_size(res));
+ if (!tpiu.base) {
+ ret = -EINVAL;
+ goto err_ioremap;
+ }
+
+ tpiu.dev = &pdev->dev;
+
+ return 0;
+
+err_ioremap:
+err_res:
+ return ret;
+}
+
+static int __devexit tpiu_remove(struct platform_device *pdev)
+{
+ if (tpiu.enabled)
+ tpiu_disable();
+ iounmap(tpiu.base);
+
+ return 0;
+}
+
+static struct platform_driver tpiu_driver = {
+ .probe = tpiu_probe,
+ .remove = __devexit_p(tpiu_remove),
+ .driver = {
+ .name = "msm_tpiu",
+ },
+};
+
+static int __init tpiu_init(void)
+{
+ return platform_driver_register(&tpiu_driver);
+}
+module_init(tpiu_init);
+
+static void __exit tpiu_exit(void)
+{
+ platform_driver_unregister(&tpiu_driver);
+}
+module_exit(tpiu_exit);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("Coresight Trace Port Interface Unit");