From: crwulff@gmail.com
To: linux-usb@vger.kernel.org
Cc: Pavel Hofman <pavel.hofman@ivitera.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
James Gruber <jimmyjgruber@gmail.com>,
Jeff Johnson <quic_jjohnson@quicinc.com>,
John Keeping <jkeeping@inmusicbrands.com>,
Jonathan Corbet <corbet@lwn.net>, Lee Jones <lee@kernel.org>,
Perr Zhang <perr@usb7.net>,
linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
Chris Wulff <crwulff@gmail.com>
Subject: [PATCH RFC 01/14] usb: gadget: f_uac: Refactor common configfs attribute defines used in UAC1/2.
Date: Sat, 28 Sep 2024 11:08:52 -0400 [thread overview]
Message-ID: <20240928150905.2616313-2-crwulff@gmail.com> (raw)
In-Reply-To: <20240928150905.2616313-1-crwulff@gmail.com>
From: Chris Wulff <crwulff@gmail.com>
Consolidate a bunch of common #defines used by both f_uac1 and f_uac2
to make it easier to maintain. Only the #defines moved and the same static
functions get created in each module as before. Formatters are also #define
which makes slightly smaller code.
Signed-off-by: Chris Wulff <crwulff@gmail.com>
---
drivers/usb/gadget/function/f_uac1.c | 148 +--------------
drivers/usb/gadget/function/f_uac2.c | 207 +--------------------
drivers/usb/gadget/function/u_uac_utils.h | 217 ++++++++++++++++++++++
3 files changed, 235 insertions(+), 337 deletions(-)
create mode 100644 drivers/usb/gadget/function/u_uac_utils.h
diff --git a/drivers/usb/gadget/function/f_uac1.c b/drivers/usb/gadget/function/f_uac1.c
index c87e74afc881..eeedcfa61fa1 100644
--- a/drivers/usb/gadget/function/f_uac1.c
+++ b/drivers/usb/gadget/function/f_uac1.c
@@ -19,6 +19,7 @@
#include "u_audio.h"
#include "u_uac1.h"
+#include "u_uac_utils.h"
/* UAC1 spec: 3.7.2.3 Audio Channel Cluster Format */
#define UAC1_CHANNEL_MASK 0x0FFF
@@ -1516,151 +1517,18 @@ static struct configfs_item_operations f_uac1_item_ops = {
.release = f_uac1_attr_release,
};
-#define uac1_kstrtou32 kstrtou32
-#define uac1_kstrtos16 kstrtos16
-#define uac1_kstrtobool(s, base, res) kstrtobool((s), (res))
-
-static const char *u32_fmt = "%u\n";
-static const char *s16_fmt = "%hd\n";
-static const char *bool_fmt = "%u\n";
-
+#define UAC1_ATTR_TO_OPTS struct f_uac1_opts *opts = to_f_uac1_opts(item)
#define UAC1_ATTRIBUTE(type, name) \
-static ssize_t f_uac1_opts_##name##_show( \
- struct config_item *item, \
- char *page) \
-{ \
- struct f_uac1_opts *opts = to_f_uac1_opts(item); \
- int result; \
- \
- mutex_lock(&opts->lock); \
- result = sprintf(page, type##_fmt, opts->name); \
- mutex_unlock(&opts->lock); \
- \
- return result; \
-} \
- \
-static ssize_t f_uac1_opts_##name##_store( \
- struct config_item *item, \
- const char *page, size_t len) \
-{ \
- struct f_uac1_opts *opts = to_f_uac1_opts(item); \
- int ret; \
- type num; \
- \
- mutex_lock(&opts->lock); \
- if (opts->refcnt) { \
- ret = -EBUSY; \
- goto end; \
- } \
- \
- ret = uac1_kstrto##type(page, 0, &num); \
- if (ret) \
- goto end; \
- \
- opts->name = num; \
- ret = len; \
- \
-end: \
- mutex_unlock(&opts->lock); \
- return ret; \
-} \
- \
-CONFIGFS_ATTR(f_uac1_opts_, name)
+ UAC_ATTRIBUTE(f_uac1_opts, UAC1_ATTR_TO_OPTS, opts, \
+ opts->lock, opts->refcnt, type, name)
#define UAC1_RATE_ATTRIBUTE(name) \
-static ssize_t f_uac1_opts_##name##_show(struct config_item *item, \
- char *page) \
-{ \
- struct f_uac1_opts *opts = to_f_uac1_opts(item); \
- int result = 0; \
- int i; \
- \
- mutex_lock(&opts->lock); \
- page[0] = '\0'; \
- for (i = 0; i < UAC_MAX_RATES; i++) { \
- if (opts->name##s[i] == 0) \
- break; \
- result += sprintf(page + strlen(page), "%u,", \
- opts->name##s[i]); \
- } \
- if (strlen(page) > 0) \
- page[strlen(page) - 1] = '\n'; \
- mutex_unlock(&opts->lock); \
- \
- return result; \
-} \
- \
-static ssize_t f_uac1_opts_##name##_store(struct config_item *item, \
- const char *page, size_t len) \
-{ \
- struct f_uac1_opts *opts = to_f_uac1_opts(item); \
- char *split_page = NULL; \
- int ret = -EINVAL; \
- char *token; \
- u32 num; \
- int i; \
- \
- mutex_lock(&opts->lock); \
- if (opts->refcnt) { \
- ret = -EBUSY; \
- goto end; \
- } \
- \
- i = 0; \
- memset(opts->name##s, 0x00, sizeof(opts->name##s)); \
- split_page = kstrdup(page, GFP_KERNEL); \
- while ((token = strsep(&split_page, ",")) != NULL) { \
- ret = kstrtou32(token, 0, &num); \
- if (ret) \
- goto end; \
- \
- opts->name##s[i++] = num; \
- ret = len; \
- }; \
- \
-end: \
- kfree(split_page); \
- mutex_unlock(&opts->lock); \
- return ret; \
-} \
- \
-CONFIGFS_ATTR(f_uac1_opts_, name)
+ UAC_RATE_ATTRIBUTE(f_uac1_opts, UAC1_ATTR_TO_OPTS, opts, \
+ opts->lock, opts->refcnt, name)
#define UAC1_ATTRIBUTE_STRING(name) \
-static ssize_t f_uac1_opts_##name##_show(struct config_item *item, \
- char *page) \
-{ \
- struct f_uac1_opts *opts = to_f_uac1_opts(item); \
- int result; \
- \
- mutex_lock(&opts->lock); \
- result = scnprintf(page, sizeof(opts->name), "%s", opts->name); \
- mutex_unlock(&opts->lock); \
- \
- return result; \
-} \
- \
-static ssize_t f_uac1_opts_##name##_store(struct config_item *item, \
- const char *page, size_t len) \
-{ \
- struct f_uac1_opts *opts = to_f_uac1_opts(item); \
- int ret = 0; \
- \
- mutex_lock(&opts->lock); \
- if (opts->refcnt) { \
- ret = -EBUSY; \
- goto end; \
- } \
- \
- ret = scnprintf(opts->name, min(sizeof(opts->name), len), \
- "%s", page); \
- \
-end: \
- mutex_unlock(&opts->lock); \
- return ret; \
-} \
- \
-CONFIGFS_ATTR(f_uac1_opts_, name)
+ UAC_ATTRIBUTE_STRING(f_uac1_opts, UAC1_ATTR_TO_OPTS, opts, \
+ opts->lock, opts->refcnt, name)
UAC1_ATTRIBUTE(u32, c_chmask);
UAC1_RATE_ATTRIBUTE(c_srate);
diff --git a/drivers/usb/gadget/function/f_uac2.c b/drivers/usb/gadget/function/f_uac2.c
index 1cdda44455b3..2142a0951f71 100644
--- a/drivers/usb/gadget/function/f_uac2.c
+++ b/drivers/usb/gadget/function/f_uac2.c
@@ -17,6 +17,7 @@
#include "u_audio.h"
#include "u_uac2.h"
+#include "u_uac_utils.h"
/* UAC2 spec: 4.1 Audio Channel Cluster Descriptor */
#define UAC2_CHANNEL_MASK 0x07FFFFFF
@@ -1877,210 +1878,22 @@ static struct configfs_item_operations f_uac2_item_ops = {
.release = f_uac2_attr_release,
};
-#define uac2_kstrtou8 kstrtou8
-#define uac2_kstrtou32 kstrtou32
-#define uac2_kstrtos16 kstrtos16
-#define uac2_kstrtobool(s, base, res) kstrtobool((s), (res))
-
-static const char *u8_fmt = "%u\n";
-static const char *u32_fmt = "%u\n";
-static const char *s16_fmt = "%hd\n";
-static const char *bool_fmt = "%u\n";
-
+#define UAC2_ATTR_TO_OPTS struct f_uac2_opts *opts = to_f_uac2_opts(item)
#define UAC2_ATTRIBUTE(type, name) \
-static ssize_t f_uac2_opts_##name##_show(struct config_item *item, \
- char *page) \
-{ \
- struct f_uac2_opts *opts = to_f_uac2_opts(item); \
- int result; \
- \
- mutex_lock(&opts->lock); \
- result = sprintf(page, type##_fmt, opts->name); \
- mutex_unlock(&opts->lock); \
- \
- return result; \
-} \
- \
-static ssize_t f_uac2_opts_##name##_store(struct config_item *item, \
- const char *page, size_t len) \
-{ \
- struct f_uac2_opts *opts = to_f_uac2_opts(item); \
- int ret; \
- type num; \
- \
- mutex_lock(&opts->lock); \
- if (opts->refcnt) { \
- ret = -EBUSY; \
- goto end; \
- } \
- \
- ret = uac2_kstrto##type(page, 0, &num); \
- if (ret) \
- goto end; \
- \
- opts->name = num; \
- ret = len; \
- \
-end: \
- mutex_unlock(&opts->lock); \
- return ret; \
-} \
- \
-CONFIGFS_ATTR(f_uac2_opts_, name)
+ UAC_ATTRIBUTE(f_uac2_opts, UAC2_ATTR_TO_OPTS, opts, \
+ opts->lock, opts->refcnt, type, name)
#define UAC2_ATTRIBUTE_SYNC(name) \
-static ssize_t f_uac2_opts_##name##_show(struct config_item *item, \
- char *page) \
-{ \
- struct f_uac2_opts *opts = to_f_uac2_opts(item); \
- int result; \
- char *str; \
- \
- mutex_lock(&opts->lock); \
- switch (opts->name) { \
- case USB_ENDPOINT_SYNC_ASYNC: \
- str = "async"; \
- break; \
- case USB_ENDPOINT_SYNC_ADAPTIVE: \
- str = "adaptive"; \
- break; \
- default: \
- str = "unknown"; \
- break; \
- } \
- result = sprintf(page, "%s\n", str); \
- mutex_unlock(&opts->lock); \
- \
- return result; \
-} \
- \
-static ssize_t f_uac2_opts_##name##_store(struct config_item *item, \
- const char *page, size_t len) \
-{ \
- struct f_uac2_opts *opts = to_f_uac2_opts(item); \
- int ret = 0; \
- \
- mutex_lock(&opts->lock); \
- if (opts->refcnt) { \
- ret = -EBUSY; \
- goto end; \
- } \
- \
- if (!strncmp(page, "async", 5)) \
- opts->name = USB_ENDPOINT_SYNC_ASYNC; \
- else if (!strncmp(page, "adaptive", 8)) \
- opts->name = USB_ENDPOINT_SYNC_ADAPTIVE; \
- else { \
- ret = -EINVAL; \
- goto end; \
- } \
- \
- ret = len; \
- \
-end: \
- mutex_unlock(&opts->lock); \
- return ret; \
-} \
- \
-CONFIGFS_ATTR(f_uac2_opts_, name)
+ UAC_ATTRIBUTE_SYNC(f_uac2_opts, UAC2_ATTR_TO_OPTS, opts, \
+ opts->lock, opts->refcnt, name)
#define UAC2_RATE_ATTRIBUTE(name) \
-static ssize_t f_uac2_opts_##name##_show(struct config_item *item, \
- char *page) \
-{ \
- struct f_uac2_opts *opts = to_f_uac2_opts(item); \
- int result = 0; \
- int i; \
- \
- mutex_lock(&opts->lock); \
- page[0] = '\0'; \
- for (i = 0; i < UAC_MAX_RATES; i++) { \
- if (opts->name##s[i] == 0) \
- break; \
- result += sprintf(page + strlen(page), "%u,", \
- opts->name##s[i]); \
- } \
- if (strlen(page) > 0) \
- page[strlen(page) - 1] = '\n'; \
- mutex_unlock(&opts->lock); \
- \
- return result; \
-} \
- \
-static ssize_t f_uac2_opts_##name##_store(struct config_item *item, \
- const char *page, size_t len) \
-{ \
- struct f_uac2_opts *opts = to_f_uac2_opts(item); \
- char *split_page = NULL; \
- int ret = -EINVAL; \
- char *token; \
- u32 num; \
- int i; \
- \
- mutex_lock(&opts->lock); \
- if (opts->refcnt) { \
- ret = -EBUSY; \
- goto end; \
- } \
- \
- i = 0; \
- memset(opts->name##s, 0x00, sizeof(opts->name##s)); \
- split_page = kstrdup(page, GFP_KERNEL); \
- while ((token = strsep(&split_page, ",")) != NULL) { \
- ret = kstrtou32(token, 0, &num); \
- if (ret) \
- goto end; \
- \
- opts->name##s[i++] = num; \
- ret = len; \
- }; \
- \
-end: \
- kfree(split_page); \
- mutex_unlock(&opts->lock); \
- return ret; \
-} \
- \
-CONFIGFS_ATTR(f_uac2_opts_, name)
+ UAC_RATE_ATTRIBUTE(f_uac2_opts, UAC2_ATTR_TO_OPTS, opts, \
+ opts->lock, opts->refcnt, name)
#define UAC2_ATTRIBUTE_STRING(name) \
-static ssize_t f_uac2_opts_##name##_show(struct config_item *item, \
- char *page) \
-{ \
- struct f_uac2_opts *opts = to_f_uac2_opts(item); \
- int result; \
- \
- mutex_lock(&opts->lock); \
- result = scnprintf(page, sizeof(opts->name), "%s", opts->name); \
- mutex_unlock(&opts->lock); \
- \
- return result; \
-} \
- \
-static ssize_t f_uac2_opts_##name##_store(struct config_item *item, \
- const char *page, size_t len) \
-{ \
- struct f_uac2_opts *opts = to_f_uac2_opts(item); \
- int ret = 0; \
- \
- mutex_lock(&opts->lock); \
- if (opts->refcnt) { \
- ret = -EBUSY; \
- goto end; \
- } \
- \
- if (len && page[len - 1] == '\n') \
- len--; \
- \
- ret = scnprintf(opts->name, min(sizeof(opts->name), len + 1), \
- "%s", page); \
- \
-end: \
- mutex_unlock(&opts->lock); \
- return ret; \
-} \
- \
-CONFIGFS_ATTR(f_uac2_opts_, name)
+ UAC_ATTRIBUTE_STRING(f_uac2_opts, UAC2_ATTR_TO_OPTS, opts, \
+ opts->lock, opts->refcnt, name)
UAC2_ATTRIBUTE(u32, p_chmask);
UAC2_RATE_ATTRIBUTE(p_srate);
diff --git a/drivers/usb/gadget/function/u_uac_utils.h b/drivers/usb/gadget/function/u_uac_utils.h
new file mode 100644
index 000000000000..5f88e31103dd
--- /dev/null
+++ b/drivers/usb/gadget/function/u_uac_utils.h
@@ -0,0 +1,217 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * u_uac_utils.h -- Utilities for UAC1/2 function driver
+ *
+ * Copyright (C) 2024
+ * Author: Chris Wulff <crwulff@gmail.com>
+ */
+
+#ifndef __U_UAC_UTILS_H
+#define __U_UAC_UTILS_H
+
+#define uac_kstrtou8 kstrtou8
+#define uac_kstrtos16 kstrtos16
+#define uac_kstrtou32 kstrtou32
+#define uac_kstrtobool(s, base, res) kstrtobool((s), (res))
+
+#define u8_FMT "%u\n"
+#define u32_FMT "%u\n"
+#define s16_FMT "%hd\n"
+#define bool_FMT "%u\n"
+
+#define UAC_ATTRIBUTE(prefix, to_struct, var, lock, refcnt, type, name) \
+static ssize_t prefix##_##name##_show(struct config_item *item, \
+ char *page) \
+{ \
+ to_struct; \
+ int result; \
+ \
+ mutex_lock(&lock); \
+ result = sprintf(page, type##_FMT, var->name); \
+ mutex_unlock(&lock); \
+ \
+ return result; \
+} \
+ \
+static ssize_t prefix##_##name##_store(struct config_item *item, \
+ const char *page, size_t len) \
+{ \
+ to_struct; \
+ int ret; \
+ type num; \
+ \
+ mutex_lock(&lock); \
+ if (refcnt) { \
+ ret = -EBUSY; \
+ goto end; \
+ } \
+ \
+ ret = uac_kstrto##type(page, 0, &num); \
+ if (ret) \
+ goto end; \
+ \
+ var->name = num; \
+ ret = len; \
+ \
+end: \
+ mutex_unlock(&lock); \
+ return ret; \
+} \
+ \
+CONFIGFS_ATTR(prefix##_, name)
+
+#define UAC_RATE_ATTRIBUTE(prefix, to_struct, var, lock, refcnt, name) \
+static ssize_t prefix##_##name##_show(struct config_item *item, \
+ char *page) \
+{ \
+ to_struct; \
+ int result = 0; \
+ int i; \
+ \
+ mutex_lock(&lock); \
+ page[0] = '\0'; \
+ for (i = 0; i < UAC_MAX_RATES; i++) { \
+ if (var->name##s[i] == 0) \
+ break; \
+ result += sprintf(page + strlen(page), "%u,", \
+ var->name##s[i]); \
+ } \
+ if (strlen(page) > 0) \
+ page[strlen(page) - 1] = '\n'; \
+ mutex_unlock(&lock); \
+ \
+ return result; \
+} \
+ \
+static ssize_t prefix##_##name##_store(struct config_item *item, \
+ const char *page, size_t len) \
+{ \
+ to_struct; \
+ char *split_page = NULL; \
+ int ret = -EINVAL; \
+ char *token; \
+ u32 num; \
+ int i; \
+ \
+ mutex_lock(&lock); \
+ if (refcnt) { \
+ ret = -EBUSY; \
+ goto end; \
+ } \
+ \
+ i = 0; \
+ memset(var->name##s, 0x00, sizeof(var->name##s)); \
+ split_page = kstrdup(page, GFP_KERNEL); \
+ while ((token = strsep(&split_page, ",")) != NULL) { \
+ ret = kstrtou32(token, 0, &num); \
+ if (ret) \
+ goto end; \
+ \
+ var->name##s[i++] = num; \
+ ret = len; \
+ }; \
+ \
+end: \
+ kfree(split_page); \
+ mutex_unlock(&lock); \
+ return ret; \
+} \
+ \
+CONFIGFS_ATTR(prefix##_, name)
+
+#define UAC_ATTRIBUTE_STRING(prefix, to_struct, var, lock, refcnt, name) \
+static ssize_t prefix##_##name##_show(struct config_item *item, \
+ char *page) \
+{ \
+ to_struct; \
+ int result; \
+ \
+ mutex_lock(&lock); \
+ result = scnprintf(page, sizeof(var->name), "%s", var->name); \
+ mutex_unlock(&lock); \
+ \
+ return result; \
+} \
+ \
+static ssize_t prefix##_##name##_store(struct config_item *item, \
+ const char *page, size_t len) \
+{ \
+ to_struct; \
+ int ret = 0; \
+ \
+ mutex_lock(&lock); \
+ if (refcnt) { \
+ ret = -EBUSY; \
+ goto end; \
+ } \
+ \
+ if (len && page[len - 1] == '\n') \
+ len--; \
+ \
+ ret = scnprintf(var->name, min(sizeof(var->name), len + 1), \
+ "%s", page); \
+ \
+end: \
+ mutex_unlock(&lock); \
+ return ret; \
+} \
+ \
+CONFIGFS_ATTR(prefix##_, name)
+
+#define UAC_ATTRIBUTE_SYNC(prefix, to_struct, var, lock, refcnt, name) \
+static ssize_t prefix##_##name##_show(struct config_item *item, \
+ char *page) \
+{ \
+ to_struct; \
+ int result; \
+ char *str; \
+ \
+ mutex_lock(&lock); \
+ switch (var->name) { \
+ case USB_ENDPOINT_SYNC_ASYNC: \
+ str = "async"; \
+ break; \
+ case USB_ENDPOINT_SYNC_ADAPTIVE: \
+ str = "adaptive"; \
+ break; \
+ default: \
+ str = "unknown"; \
+ break; \
+ } \
+ result = sprintf(page, "%s\n", str); \
+ mutex_unlock(&lock); \
+ \
+ return result; \
+} \
+ \
+static ssize_t prefix##_##name##_store(struct config_item *item, \
+ const char *page, size_t len) \
+{ \
+ to_struct; \
+ int ret = 0; \
+ \
+ mutex_lock(&lock); \
+ if (refcnt) { \
+ ret = -EBUSY; \
+ goto end; \
+ } \
+ \
+ if (!strncmp(page, "async", 5)) \
+ var->name = USB_ENDPOINT_SYNC_ASYNC; \
+ else if (!strncmp(page, "adaptive", 8)) \
+ var->name = USB_ENDPOINT_SYNC_ADAPTIVE; \
+ else { \
+ ret = -EINVAL; \
+ goto end; \
+ } \
+ \
+ ret = len; \
+ \
+end: \
+ mutex_unlock(&lock); \
+ return ret; \
+} \
+ \
+CONFIGFS_ATTR(prefix##_, name)
+
+#endif /* __U_UAC_UTILS_H */
--
2.43.0
next prev parent reply other threads:[~2024-09-28 15:09 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-09-28 15:08 [PATCH RFC 00/14] usb: gadget: f_uac: Add support for alt mode settings crwulff
2024-09-28 15:08 ` crwulff [this message]
2024-09-28 15:08 ` [PATCH RFC 02/14] usb: gadget: f_uac1: Fix fs/hs/ss descriptors to have correct values crwulff
2024-09-28 15:08 ` [PATCH RFC 03/14] usb: gadget: f_uac1: Add adaptive sync support for capture crwulff
2024-09-28 15:08 ` [PATCH RFC 04/14] usb: gadget: f_uac2: Move max packet size code to a common header crwulff
2024-09-28 15:08 ` [PATCH RFC 05/14] usb: gadget: f_uac1: Add hs_bint to configfs crwulff
2024-09-28 15:08 ` [PATCH RFC 06/14] usb: gadget: f_uac1: Add terminal type attributes crwulff
2024-09-28 15:08 ` [PATCH RFC 07/14] usb: gadget: f_uac1: Add alt mode settings interface crwulff
2024-09-28 15:08 ` [PATCH RFC 08/14] usb: gadget: f_uac2: " crwulff
2024-09-28 15:09 ` [PATCH RFC 09/14] usb: gadget: f_uac1: Make string table dynamic with strings from all alt modes crwulff
2024-09-28 15:09 ` [PATCH RFC 10/14] usb: gadget: f_uac2: " crwulff
2024-09-28 15:09 ` [PATCH RFC 11/14] usb: gadget: f_uac1: Generate dynamic descriptors based on alt opts crwulff
2024-09-28 15:09 ` [PATCH RFC 12/14] usb: gadget: f_uac2: " crwulff
2024-09-28 15:09 ` [PATCH RFC 13/14] usb: gadget: f_uac1: support ganged volume/mute controls crwulff
2024-09-28 15:09 ` [PATCH RFC 14/14] usb: gadget: f_uac2: " crwulff
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