Accessiblity: speakup_keypc: specifying the default driver parameters…

… among the module params

This is an enhancement which allows to specify the default driver
parameters among the module parameters.

Adding default variables to the speakup_keypc module
allows to easily set that at boot, rather than
setting the sys variables after boot.
More details can be found here:
linux-speakup/speakup#7

Signed-off-by: Osama Muhammad <osmtendev@gmail.com>
Reviewed-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Link: https://lore.kernel.org/r/20221109215108.7933-11-osmtendev@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/accessibility/speakup/speakup_keypc.c

@@ -33,12 +33,21 @@ static int synth_port;
 static int port_forced;
 static unsigned int synth_portlist[] = { 0x2a8, 0 };
 
-static struct var_t vars[] = {
-	{ CAPS_START, .u.s = {"[f130]" } },
-	{ CAPS_STOP, .u.s = {"[f90]" } },
-	{ RATE, .u.n = {"\04%c ", 8, 0, 10, 81, -8, NULL } },
-	{ PITCH, .u.n = {"[f%d]", 5, 0, 9, 40, 10, NULL } },
-	{ DIRECT, .u.n = {NULL, 0, 0, 1, 0, 0, NULL } },
+
+enum default_vars_id {
+	CAPS_START_ID = 0, CAPS_STOP_ID,
+	RATE_ID, PITCH_ID,
+	DIRECT_ID, V_LAST_VAR_ID,
+	NB_ID
+};
+
+
+static struct var_t vars[NB_ID] = {
+	[CAPS_START_ID] = { CAPS_START, .u.s = {"[f130]" } },
+	[CAPS_STOP_ID] = { CAPS_STOP, .u.s = {"[f90]" } },
+	[RATE_ID] = { RATE, .u.n = {"\04%c ", 8, 0, 10, 81, -8, NULL } },
+	[PITCH_ID] = { PITCH, .u.n = {"[f%d]", 5, 0, 9, 40, 10, NULL } },
+	[DIRECT_ID] = { DIRECT, .u.n = {NULL, 0, 0, 1, 0, 0, NULL } },
 	V_LAST_VAR
 };
 
@@ -305,9 +314,17 @@ static void keynote_release(struct spk_synth *synth)
 
 module_param_hw_named(port, port_forced, int, ioport, 0444);
 module_param_named(start, synth_keypc.startup, short, 0444);
+module_param_named(rate, vars[RATE_ID].u.n.default_val, int, 0444);
+module_param_named(pitch, vars[PITCH_ID].u.n.default_val, int, 0444);
+module_param_named(direct, vars[DIRECT_ID].u.n.default_val, int, 0444);
 
 MODULE_PARM_DESC(port, "Set the port for the synthesizer (override probing).");
 MODULE_PARM_DESC(start, "Start the synthesizer once it is loaded.");
+MODULE_PARM_DESC(rate, "Set the rate variable on load.");
+MODULE_PARM_DESC(pitch, "Set the pitch variable on load.");
+MODULE_PARM_DESC(direct, "Set the direct variable on load.");
+
+
 
 module_spk_synth(synth_keypc);