linux-kernel - [PATCH] Accessiblity: speakup_bns: specifying the default driver parameters among the module params

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Date:   Fri, 21 Oct 2022 18:53:42 +0500
From:   Osama Muhammad <osmtendev@...il.com>
To:     samuel.thibault@...-lyon.org
Cc:     gregkh@...uxfoundation.org, speakup@...ux-speakup.org,
        linux-kernel@...r.kernel.org, Osama Muhammad <osmtendev@...il.com>
Subject: [PATCH] Accessiblity: speakup_bns: 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 a default variables to the speakup_bns module
allows to easily set that at boot, rather than
setting the sys variables after boot.
More details can be found here:
https://github.com/linux-speakup/speakup/issues/7

Signed-off-by: Osama Muhammad <osmtendev@...il.com>
---
 drivers/accessibility/speakup/speakup_bns.c | 36 ++++++++++++++++-----
 1 file changed, 28 insertions(+), 8 deletions(-)

diff --git a/drivers/accessibility/speakup/speakup_bns.c b/drivers/accessibility/speakup/speakup_bns.c
index b8103eb117b8..60507756499c 100644
--- a/drivers/accessibility/speakup/speakup_bns.c
+++ b/drivers/accessibility/speakup/speakup_bns.c
@@ -16,14 +16,23 @@
 #define SYNTH_CLEAR 0x18
 #define PROCSPEECH '\r'
 
-static struct var_t vars[] = {
-	{ CAPS_START, .u.s = {"\x05\x31\x32P" } },
-	{ CAPS_STOP, .u.s = {"\x05\x38P" } },
-	{ RATE, .u.n = {"\x05%dE", 8, 1, 16, 0, 0, NULL } },
-	{ PITCH, .u.n = {"\x05%dP", 8, 0, 16, 0, 0, NULL } },
-	{ VOL, .u.n = {"\x05%dV", 8, 0, 16, 0, 0, NULL } },
-	{ TONE, .u.n = {"\x05%dT", 8, 0, 16, 0, 0, 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,
+	VOL_ID, TONE_ID,
+	DIRECT_ID, V_LAST_VAR_ID,
+	NB_ID
+};
+
+static struct var_t vars[NB_ID] = {
+	[CAPS_START_ID] = { CAPS_START, .u.s = {"\x05\x31\x32P" } },
+	[CAPS_STOP_ID] = { CAPS_STOP, .u.s = {"\x05\x38P" } },
+	[RATE_ID] = { RATE, .u.n = {"\x05%dE", 8, 1, 16, 0, 0, NULL } },
+	[PITCH_ID] = { PITCH, .u.n = {"\x05%dP", 8, 0, 16, 0, 0, NULL } },
+	[VOL_ID] = { VOL, .u.n = {"\x05%dV", 8, 0, 16, 0, 0, NULL } },
+	[TONE_ID] = { TONE, .u.n = {"\x05%dT", 8, 0, 16, 0, 0, NULL } },
+	[DIRECT_ID] = { DIRECT, .u.n = {NULL, 0, 0, 1, 0, 0, NULL } },
 	V_LAST_VAR
 };
 
@@ -113,10 +122,21 @@ static struct spk_synth synth_bns = {
 module_param_named(ser, synth_bns.ser, int, 0444);
 module_param_named(dev, synth_bns.dev_name, charp, 0444);
 module_param_named(start, synth_bns.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(vol, vars[VOL_ID].u.n.default_val, int, 0444);
+module_param_named(tone, vars[TONE_ID].u.n.default_val, int, 0444);
+module_param_named(direct, vars[DIRECT_ID].u.n.default_val, int, 0444);
+
 
 MODULE_PARM_DESC(ser, "Set the serial port for the synthesizer (0-based).");
 MODULE_PARM_DESC(dev, "Set the device e.g. ttyUSB0, for the synthesizer.");
 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(vol, "Set the vol variable on load.");
+MODULE_PARM_DESC(tone, "Set the tone variable on load.");
+MODULE_PARM_DESC(direct, "Set the direct variable on load.");
 
 module_spk_synth(synth_bns);
 
-- 
2.25.1