[PATCH] Input: add modalias support
Here's the patch for modalias support for input classes. It uses
comma-separated numbers, and doesn't describe all the potential keys (no
module currently cares, and that would make the strings huge). The
changes to input.h are to move the definitions needed by file2alias
outside __KERNEL__. I chose not to move those definitions to
mod_devicetable.h, because there are so many that it might break compile
of something else in the kernel.
The rest is fairly straightforward.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
CC: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/scripts/mod/file2alias.c b/scripts/mod/file2alias.c
index e3d144a..e0eedff 100644
--- a/scripts/mod/file2alias.c
+++ b/scripts/mod/file2alias.c
@@ -16,8 +16,10 @@
* use either stdint.h or inttypes.h for the rest. */
#if KERNEL_ELFCLASS == ELFCLASS32
typedef Elf32_Addr kernel_ulong_t;
+#define BITS_PER_LONG 32
#else
typedef Elf64_Addr kernel_ulong_t;
+#define BITS_PER_LONG 64
#endif
#ifdef __sun__
#include <inttypes.h>
@@ -35,6 +37,7 @@
* even potentially has different endianness and word sizes, since
* we handle those differences explicitly below */
#include "../../include/linux/mod_devicetable.h"
+#include "../../include/linux/input.h"
#define ADD(str, sep, cond, field) \
do { \
@@ -366,6 +369,61 @@
return 1;
}
+#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
+
+static void do_input(char *alias,
+ kernel_ulong_t *arr, unsigned int min, unsigned int max)
+{
+ unsigned int i;
+ for (i = min; i < max; i++) {
+ if (arr[i/BITS_PER_LONG] & (1 << (i%BITS_PER_LONG)))
+ sprintf(alias+strlen(alias), "%X,*", i);
+ }
+}
+
+/* input:b0v0p0e0-eXkXrXaXmXlXsXfXwX where X is comma-separated %02X. */
+static int do_input_entry(const char *filename, struct input_device_id *id,
+ char *alias)
+{
+ sprintf(alias, "input:");
+
+ ADD(alias, "b", id->flags&INPUT_DEVICE_ID_MATCH_BUS, id->id.bustype);
+ ADD(alias, "v", id->flags&INPUT_DEVICE_ID_MATCH_VENDOR, id->id.vendor);
+ ADD(alias, "p", id->flags&INPUT_DEVICE_ID_MATCH_PRODUCT,
+ id->id.product);
+ ADD(alias, "e", id->flags&INPUT_DEVICE_ID_MATCH_VERSION,
+ id->id.version);
+
+ sprintf(alias + strlen(alias), "-e*");
+ if (id->flags&INPUT_DEVICE_ID_MATCH_EVBIT)
+ do_input(alias, id->evbit, 0, EV_MAX);
+ sprintf(alias + strlen(alias), "k*");
+ if (id->flags&INPUT_DEVICE_ID_MATCH_KEYBIT)
+ do_input(alias, id->keybit, KEY_MIN_INTERESTING, KEY_MAX);
+ sprintf(alias + strlen(alias), "r*");
+ if (id->flags&INPUT_DEVICE_ID_MATCH_RELBIT)
+ do_input(alias, id->relbit, 0, REL_MAX);
+ sprintf(alias + strlen(alias), "a*");
+ if (id->flags&INPUT_DEVICE_ID_MATCH_ABSBIT)
+ do_input(alias, id->absbit, 0, ABS_MAX);
+ sprintf(alias + strlen(alias), "m*");
+ if (id->flags&INPUT_DEVICE_ID_MATCH_MSCIT)
+ do_input(alias, id->mscbit, 0, MSC_MAX);
+ sprintf(alias + strlen(alias), "l*");
+ if (id->flags&INPUT_DEVICE_ID_MATCH_LEDBIT)
+ do_input(alias, id->ledbit, 0, LED_MAX);
+ sprintf(alias + strlen(alias), "s*");
+ if (id->flags&INPUT_DEVICE_ID_MATCH_SNDBIT)
+ do_input(alias, id->sndbit, 0, SND_MAX);
+ sprintf(alias + strlen(alias), "f*");
+ if (id->flags&INPUT_DEVICE_ID_MATCH_FFBIT)
+ do_input(alias, id->ffbit, 0, SND_MAX);
+ sprintf(alias + strlen(alias), "w*");
+ if (id->flags&INPUT_DEVICE_ID_MATCH_SWBIT)
+ do_input(alias, id->swbit, 0, SW_MAX);
+ return 1;
+}
+
/* Ignore any prefix, eg. v850 prepends _ */
static inline int sym_is(const char *symbol, const char *name)
{
@@ -453,7 +511,9 @@
else if (sym_is(symname, "__mod_i2c_device_table"))
do_table(symval, sym->st_size, sizeof(struct i2c_device_id),
do_i2c_entry, mod);
-
+ else if (sym_is(symname, "__mod_input_device_table"))
+ do_table(symval, sym->st_size, sizeof(struct input_device_id),
+ do_input_entry, mod);
}
/* Now add out buffered information to the generated C source */