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 at 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 at 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", ®);
+
+ 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 at 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", ®);
+ 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
