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authorVunny Sodhi <vunnyx.sodhi@intel.com>2017-06-30 09:06:08 +0530
committerMark Brown <broonie@kernel.org>2017-06-30 13:28:06 +0100
commitbdd0384a5ada8bb5745e5f29c10a5ba88827efad (patch)
tree793e739aaed545302f4ef784e1c9f77919bcc4e0 /sound
parent09e914d6b647cf23d81a226e1f1c4464bafdeb2d (diff)
downloadlinux-bdd0384a5ada8bb5745e5f29c10a5ba88827efad.tar.bz2
ASoC: Intel: Skylake: Add support to read firmware registers
This patch adds debugfs support to read fw registers, mailbox offsets and sram address. Signed-off-by: Mousumi Jana <mousumix.jana@intel.com> Signed-off-by: Ramesh Babu <ramesh.babu@intel.com> Signed-off-by: Jayachandran B <jayachandran.b@intel.com> Signed-off-by: Pardha Saradhi K <pardha.saradhi.kesapragada@intel.com> Signed-off-by: Vunny Sodhi <vunnyx.sodhi@intel.com> Signed-off-by: Guneshwor Singh <guneshwor.o.singh@intel.com> Acked-By: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound')
-rw-r--r--sound/soc/intel/skylake/skl-debug.c57
1 files changed, 57 insertions, 0 deletions
diff --git a/sound/soc/intel/skylake/skl-debug.c b/sound/soc/intel/skylake/skl-debug.c
index be3238c63200..75497b1fda45 100644
--- a/sound/soc/intel/skylake/skl-debug.c
+++ b/sound/soc/intel/skylake/skl-debug.c
@@ -16,10 +16,15 @@
#include <linux/pci.h>
#include <linux/debugfs.h>
#include "skl.h"
+#include "skl-sst-dsp.h"
+#include "skl-sst-ipc.h"
#include "skl-tplg-interface.h"
#include "skl-topology.h"
+#include "../common/sst-dsp-priv.h"
#define MOD_BUF PAGE_SIZE
+#define FW_REG_BUF PAGE_SIZE
+#define FW_REG_SIZE 0x60
struct skl_debug {
struct skl *skl;
@@ -27,6 +32,7 @@ struct skl_debug {
struct dentry *fs;
struct dentry *modules;
+ u8 fw_read_buff[FW_REG_BUF];
};
static ssize_t skl_print_pins(struct skl_module_pin *m_pin, char *buf,
@@ -169,6 +175,51 @@ void skl_debug_init_module(struct skl_debug *d,
dev_err(d->dev, "%s: module debugfs init failed\n", w->name);
}
+static ssize_t fw_softreg_read(struct file *file, char __user *user_buf,
+ size_t count, loff_t *ppos)
+{
+ struct skl_debug *d = file->private_data;
+ struct sst_dsp *sst = d->skl->skl_sst->dsp;
+ size_t w0_stat_sz = sst->addr.w0_stat_sz;
+ void __iomem *in_base = sst->mailbox.in_base;
+ void __iomem *fw_reg_addr;
+ unsigned int offset;
+ char *tmp;
+ ssize_t ret = 0;
+
+ tmp = kzalloc(FW_REG_BUF, GFP_KERNEL);
+ if (!tmp)
+ return -ENOMEM;
+
+ fw_reg_addr = in_base - w0_stat_sz;
+ memset(d->fw_read_buff, 0, FW_REG_BUF);
+
+ if (w0_stat_sz > 0)
+ __iowrite32_copy(d->fw_read_buff, fw_reg_addr, w0_stat_sz >> 2);
+
+ for (offset = 0; offset < FW_REG_SIZE; offset += 16) {
+ ret += snprintf(tmp + ret, FW_REG_BUF - ret, "%#.4x: ", offset);
+ hex_dump_to_buffer(d->fw_read_buff + offset, 16, 16, 4,
+ tmp + ret, FW_REG_BUF - ret, 0);
+ ret += strlen(tmp + ret);
+
+ /* print newline for each offset */
+ if (FW_REG_BUF - ret > 0)
+ tmp[ret++] = '\n';
+ }
+
+ ret = simple_read_from_buffer(user_buf, count, ppos, tmp, ret);
+ kfree(tmp);
+
+ return ret;
+}
+
+static const struct file_operations soft_regs_ctrl_fops = {
+ .open = simple_open,
+ .read = fw_softreg_read,
+ .llseek = default_llseek,
+};
+
struct skl_debug *skl_debugfs_init(struct skl *skl)
{
struct skl_debug *d;
@@ -195,6 +246,12 @@ struct skl_debug *skl_debugfs_init(struct skl *skl)
goto err;
}
+ if (!debugfs_create_file("fw_soft_regs_rd", 0444, d->fs, d,
+ &soft_regs_ctrl_fops)) {
+ dev_err(d->dev, "fw soft regs control debugfs init failed\n");
+ goto err;
+ }
+
return d;
err: