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Message-Id: <1450964968-9792-7-git-send-email-nick.dyer@itdev.co.uk>
Date: Thu, 24 Dec 2015 13:49:25 +0000
From: Nick Dyer <nick.dyer@...ev.co.uk>
To: Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc: Benson Leung <bleung@...omium.org>, linux-input@...r.kernel.org,
linux-kernel@...r.kernel.org, Alan Bowens <Alan.Bowens@...el.com>,
Javier Martinez Canillas <javier@....samsung.com>,
Chris Healy <cphealy@...il.com>,
Nick Dyer <nick.dyer@...ev.co.uk>
Subject: [PATCH RFC v2 6/9] Input: atmel_mxt_ts - add support for reference data
There are different datatypes available from a maXTouch chip. Add
support to retrieve reference data as well.
Signed-off-by: Nick Dyer <nick.dyer@...ev.co.uk>
---
drivers/input/touchscreen/atmel_mxt_ts.c | 75 +++++++++++++++++++++++++-------
1 file changed, 59 insertions(+), 16 deletions(-)
diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c
index a2f11836..bccd7bc 100644
--- a/drivers/input/touchscreen/atmel_mxt_ts.c
+++ b/drivers/input/touchscreen/atmel_mxt_ts.c
@@ -132,6 +132,7 @@ struct t9_range {
/* MXT_DEBUG_DIAGNOSTIC_T37 */
#define MXT_DIAGNOSTIC_PAGEUP 0x01
#define MXT_DIAGNOSTIC_DELTAS 0x10
+#define MXT_DIAGNOSTIC_REFS 0x11
#define MXT_DIAGNOSTIC_SIZE 128
#define MXT_FAMILY_1386 160
@@ -211,6 +212,8 @@ enum t100_type {
#define MXT_PIXELS_PER_MM 20
+struct mxt_data;
+
struct mxt_info {
u8 family_id;
u8 variant_id;
@@ -230,6 +233,27 @@ struct mxt_object {
} __packed;
#ifdef CONFIG_DEBUG_FS
+struct mxt_debug_datatype {
+ u8 mode;
+ char *name;
+};
+
+struct mxt_debug_entry {
+ struct mxt_data *data;
+ const struct mxt_debug_datatype *datatype;
+};
+
+static const struct mxt_debug_datatype mxt_dbg_datatypes[] = {
+ {
+ .mode = MXT_DIAGNOSTIC_REFS,
+ .name = "refs",
+ },
+ {
+ .mode = MXT_DIAGNOSTIC_DELTAS,
+ .name = "deltas",
+ },
+};
+
struct mxt_dbg {
u16 t37_address;
u16 diag_cmd_address;
@@ -238,6 +262,8 @@ struct mxt_dbg {
unsigned int t37_nodes;
struct dentry *debugfs_dir;
+ struct mxt_debug_entry entries[ARRAY_SIZE(mxt_dbg_datatypes)];
+ struct mutex dbg_mutex;
};
#endif
@@ -2142,7 +2168,7 @@ static u16 mxt_get_debug_value(struct mxt_data *data, unsigned int x,
return get_unaligned_le16(&dbg->t37_buf[page].data[ofs]);
}
-static void mxt_convert_debug_pages(struct seq_file *s, struct mxt_data *data)
+static int mxt_convert_debug_pages(struct seq_file *s, struct mxt_data *data)
{
struct mxt_dbg *dbg = &data->dbg;
unsigned int x = 0;
@@ -2166,26 +2192,31 @@ static void mxt_convert_debug_pages(struct seq_file *s, struct mxt_data *data)
y++;
}
}
+
+ return 0;
}
static int mxt_read_diagnostic_debug(struct seq_file *s, void *d)
{
- struct mxt_data *data = dev_get_drvdata(s->private);
+ struct mxt_debug_entry *e = s->private;
+ struct mxt_data *data = e->data;
struct mxt_dbg *dbg = &data->dbg;
int retries = 0;
int page;
int ret;
- u8 mode = MXT_DIAGNOSTIC_DELTAS;
+ u8 mode = e->datatype->mode;
u8 cmd = mode;
struct t37_debug *p;
+ mutex_lock(&dbg->dbg_mutex);
+
for (page = 0; page < dbg->t37_pages; page++) {
p = dbg->t37_buf + page;
ret = mxt_write_reg(data->client, dbg->diag_cmd_address,
cmd);
if (ret)
- return ret;
+ goto release;
retries = 0;
@@ -2196,7 +2227,7 @@ wait_cmd:
ret = __mxt_read_reg(data->client, dbg->t37_address,
2, p);
if (ret)
- return ret;
+ goto release;
if ((p->mode != mode) || (p->page != page)) {
if (retries++ > 100)
@@ -2210,7 +2241,7 @@ wait_cmd:
ret = __mxt_read_reg(data->client, dbg->t37_address,
sizeof(struct t37_debug), p);
if (ret)
- return ret;
+ goto release;
dev_dbg(&data->client->dev, "%s page:%d retries:%d\n",
__func__, page, retries);
@@ -2219,17 +2250,19 @@ wait_cmd:
cmd = MXT_DIAGNOSTIC_PAGEUP;
}
- mxt_convert_debug_pages(s, data);
+ ret = mxt_convert_debug_pages(s, data);
- return 0;
+release:
+ mutex_unlock(&dbg->dbg_mutex);
+ return ret;
}
static int mxt_debugfs_data_open(struct inode *inode, struct file *f)
{
- struct mxt_data *data = inode->i_private;
- size_t size = data->dbg.t37_nodes * sizeof(u16);
+ struct mxt_debug_entry *e = inode->i_private;
+ size_t size = e->data->dbg.t37_nodes * sizeof(u16);
- return single_open_size(f, mxt_read_diagnostic_debug, data, size);
+ return single_open_size(f, mxt_read_diagnostic_debug, e, size);
}
static const struct file_operations mxt_debugfs_data_ops = {
@@ -2252,6 +2285,8 @@ static void mxt_debugfs_init(struct mxt_data *data)
struct mxt_object *object;
char dirname[50];
struct dentry *dent;
+ struct mxt_debug_entry *e;
+ int i;
object = mxt_get_object(data, MXT_GEN_COMMAND_T6);
if (!object)
@@ -2297,11 +2332,19 @@ static void mxt_debugfs_init(struct mxt_data *data)
if (!dbg->t37_buf)
goto error;
- dent = debugfs_create_file("deltas", S_IRUGO,
- dbg->debugfs_dir, data,
- &mxt_debugfs_data_ops);
- if (!dent)
- goto error;
+ for (i = 0; i < ARRAY_SIZE(mxt_dbg_datatypes); i++) {
+ e = &dbg->entries[i];
+ e->data = data;
+ e->datatype = mxt_dbg_datatypes + i;
+
+ dent = debugfs_create_file(mxt_dbg_datatypes[i].name, S_IRUGO,
+ dbg->debugfs_dir, e,
+ &mxt_debugfs_data_ops);
+ if (!dent)
+ goto error;
+ }
+
+ mutex_init(&dbg->dbg_mutex);
return;
--
2.5.0
--
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