[PATCH intel-gpu-tools] tools: Added intel_dpio_read and intel_dpio_write

Vijay Purushothaman
2012-08-02T12:06:17Z

In Valleyview the DPLL and lane control registers are accessible only
through side band fabric called DPIO. Added two tools to read and write
registers residing in this space.

Signed-off-by: Vijay Purushothaman <vijay.a.purushothaman@intel.com>
---
tools/Makefile.am | 2 +
tools/intel_dpio_read.c | 105 ++++++++++++++++++++++++++++++++++++++++++++++
tools/intel_dpio_write.c | 103 +++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 210 insertions(+)
create mode 100644 tools/intel_dpio_read.c
create mode 100644 tools/intel_dpio_write.c

diff --git a/tools/Makefile.am b/tools/Makefile.am
index d461f38..71fb087 100644
--- a/tools/Makefile.am
+++ b/tools/Makefile.am
@@ -15,6 +15,8 @@ bin_PROGRAMS = \
intel_reg_write \
intel_reg_read \
intel_forcewaked \
+ intel_dpio_read \
+ intel_dpio_write \
intel_l3_parity

noinst_PROGRAMS = \
diff --git a/tools/intel_dpio_read.c b/tools/intel_dpio_read.c
new file mode 100644
index 0000000..8b924fd
--- /dev/null
+++ b/tools/intel_dpio_read.c
@@ -0,0 +1,105 @@
+/*
+ * Copyright © 2012 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ * Authors:
+ * Vijay Purushothaman <vijay.a.purushothaman@intel.com>
+ *
+ */
+
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <err.h>
+#include <string.h>
+#include "intel_gpu_tools.h"
+
+#define VLV_DISPLAY_BASE 0x180000
+#define DPIO_PKT 0x2100
+#define DPIO_RID (0 << 24)
+#define DPIO_OP_WRITE (1 << 16)
+#define DPIO_OP_READ (0 << 16)
+#define DPIO_PORTID (0x12 << 8)
+#define DPIO_BYTE (0xf << 4)
+#define DPIO_BUSY (1 << 0)
+#define DPIO_DATA 0x2104
+#define DPIO_REG 0x2108
+
+static uint32_t vlv_display_reg_read(uint32_t reg)
+{
+ reg += VLV_DISPLAY_BASE;
+ return (*(volatile uint32_t *)((volatile char*)mmio + reg));
+}
+
+static void vlv_display_reg_write(uint32_t reg, uint32_t val)
+{
+ volatile uint32_t *ptr;
+
+ reg += VLV_DISPLAY_BASE;
+ ptr = (volatile uint32_t *)((volatile char *) mmio + reg);
+ *ptr = val;
+}
+
+static void usage(char *cmdname)
+{
+ printf("Warning : This program will work only on Valleyview\n");
+ printf("Usage: %s [addr]\n", cmdname);
+ printf("\t addr : in 0xXXXX format\n");
+}
+
+int main(int argc, char** argv)
+{
+ int ret = 0;
+ uint32_t reg, val;
+ char *cmdname = strdup(argv[0]);
+
+ if (argc != 2) {
+ usage(cmdname);
+ ret = 1;
+ goto out;
+ }
+
+ sscanf(argv[1], "0x%x", &reg);
+
+ intel_register_access_init(intel_get_pci_device(), 0);
+
+ /* Check whether the side band fabric is ready to accept commands */
+ do {
+ usleep(1);
+ } while (vlv_display_reg_read(DPIO_PKT) & DPIO_BUSY);
+
+ vlv_display_reg_write(DPIO_REG, reg);
+ vlv_display_reg_write(DPIO_PKT, DPIO_RID | DPIO_OP_READ | DPIO_PORTID |
+ DPIO_BYTE);
+ do {
+ usleep(1);
+ } while (vlv_display_reg_read(DPIO_PKT) & DPIO_BUSY);
+
+ val = vlv_display_reg_read(DPIO_DATA);
+
+ printf("Read DPIO register: 0x%x - Value : 0x%x\n", reg, val);
+
+ intel_register_access_fini();
+
+out:
+ free(cmdname);
+ return ret;
+}
diff --git a/tools/intel_dpio_write.c b/tools/intel_dpio_write.c
new file mode 100644
index 0000000..96b72dd
--- /dev/null
+++ b/tools/intel_dpio_write.c
@@ -0,0 +1,103 @@
+/*
+ * Copyright © 2012 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ * Authors:
+ * Vijay Purushothaman <vijay.a.purushothaman@intel.com>
+ *
+ */
+
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <err.h>
+#include <string.h>
+#include "intel_gpu_tools.h"
+
+#define VLV_DISPLAY_BASE 0x180000
+#define DPIO_PKT 0x2100
+#define DPIO_RID (0 << 24)
+#define DPIO_OP_WRITE (1 << 16)
+#define DPIO_OP_READ (0 << 16)
+#define DPIO_PORTID (0x12 << 8)
+#define DPIO_BYTE (0xf << 4)
+#define DPIO_BUSY (1 << 0)
+#define DPIO_DATA 0x2104
+#define DPIO_REG 0x2108
+
+static uint32_t vlv_display_reg_read(uint32_t reg)
+{
+ reg += VLV_DISPLAY_BASE;
+ return (*(volatile uint32_t *)((volatile char*)mmio + reg));
+}
+
+static void vlv_display_reg_write(uint32_t reg, uint32_t val)
+{
+ volatile uint32_t *ptr;
+
+ reg += VLV_DISPLAY_BASE;
+ ptr = (volatile uint32_t *)((volatile char *) mmio + reg);
+ *ptr = val;
+}
+
+static void usage(char *cmdname)
+{
+ printf("Warning : This program will work only on Valleyview\n");
+ printf("Usage: %s [addr] [val]\n", cmdname);
+ printf("\t addr : in 0xXXXX format\n");
+}
+
+int main(int argc, char** argv)
+{
+ int ret = 0;
+ uint32_t reg, val;
+ char *cmdname = strdup(argv[0]);
+
+ if (argc != 3) {
+ usage(cmdname);
+ ret = 1;
+ goto out;
+ }
+
+ sscanf(argv[1], "0x%x", &reg);
+ sscanf(argv[2], "0x%x", &val);
+
+ intel_register_access_init(intel_get_pci_device(), 0);
+
+ /* Check whether the side band fabric is ready to accept commands */
+ do {
+ usleep(1);
+ } while (vlv_display_reg_read(DPIO_PKT) & DPIO_BUSY);
+
+ vlv_display_reg_write(DPIO_DATA, val);
+ vlv_display_reg_write(DPIO_REG, reg);
+ vlv_display_reg_write(DPIO_PKT, DPIO_RID | DPIO_OP_WRITE | DPIO_PORTID |
+ DPIO_BYTE);
+ do {
+ usleep(1);
+ } while (vlv_display_reg_read(DPIO_PKT) & DPIO_BUSY);
+
+ intel_register_access_fini();
+
+out:
+ free(cmdname);
+ return ret;
+}
--
1.7.9.5