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authorFilip Bozuta <Filip.Bozuta@rt-rk.com>2020-01-15 20:36:41 +0100
committerLaurent Vivier <laurent@vivier.eu>2020-02-19 11:17:40 +0100
commit1c4c6fcd1a2ae56e98be3a441e19a0933c508a51 (patch)
tree3ef1f82d206f5eda62c6c646f8785259997a12a2 /linux-user
parentf63c9862ffd13e41126dd2a70e4c4c287da549a5 (diff)
linux-user: Add support for getting alsa timer version and id
This patch implements functionalities of following ioctls: SNDRV_TIMER_IOCTL_PVERSION - Getting the sound timer version Read the sound timer version. The third ioctl's argument is a pointer to an int in which the specified timers version is returned. SNDRV_TIMER_IOCTL_NEXT_DEVICE - Getting id information about next timer Read id information about the next timer device from the sound timer device list. The id infomration is returned in the following structure: struct snd_timer_id { int dev_class; /* timer device class number */ int dev_sclass; /* slave device class number (unused) */ int card; /* card number */ int device; /* device number */ int subdevice; /* sub-device number */ }; The devices in the sound timer device list are arranged by the fields of this structure respectively (first by dev_class number, then by card number, ...). A pointer to this structure should be passed as the third ioctl's argument. Before calling the ioctl, the parameters of this structure should be initialized in relation to the next timer device which information is to be obtained. For example, if a wanted timer device has the device class number equal to or bigger then 2, the field dev_class should be initialized to 2. After the ioctl call, the structure fields are filled with values from the next device in the sound timer device list. If there is no next device in the list, the structure is filled with "zero" id values (in that case all fields are filled with value -1). Implementation notes: The ioctl 'SNDRV_TIMER_IOCTL_NEXT_DEVICE' has a pointer to a 'struct snd_timer_id' as its third argument. That is the reason why corresponding definition is added in 'linux-user/syscall_types.h'. Since all elements of this structure are of type 'int', the rest of the implementation was straightforward. The line '#include <linux/rtc.h>' was added to recognize preprocessor definitions for these ioctls. This needs to be done only once in this series of commits. Also, the content of this file (with respect to ioctl definitions) remained unchanged for a long time, therefore there is no need to worry about supporting older Linux kernel version. Reviewed-by: Laurent Vivier <laurent@vivier.eu> Signed-off-by: Filip Bozuta <Filip.Bozuta@rt-rk.com> Message-Id: <1579117007-7565-8-git-send-email-Filip.Bozuta@rt-rk.com> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Diffstat (limited to 'linux-user')
-rw-r--r--linux-user/ioctls.h4
-rw-r--r--linux-user/syscall.c1
-rw-r--r--linux-user/syscall_defs.h5
-rw-r--r--linux-user/syscall_types.h7
4 files changed, 17 insertions, 0 deletions
diff --git a/linux-user/ioctls.h b/linux-user/ioctls.h
index 73dcc761e6..950e99617d 100644
--- a/linux-user/ioctls.h
+++ b/linux-user/ioctls.h
@@ -461,6 +461,10 @@
IOCTL(SOUND_MIXER_WRITE_LOUD, IOC_W, MK_PTR(TYPE_INT))
IOCTL(SOUND_MIXER_WRITE_RECSRC, IOC_W, MK_PTR(TYPE_INT))
+ IOCTL(SNDRV_TIMER_IOCTL_PVERSION, IOC_R, MK_PTR(TYPE_INT))
+ IOCTL(SNDRV_TIMER_IOCTL_NEXT_DEVICE, IOC_RW,
+ MK_PTR(MK_STRUCT(STRUCT_snd_timer_id)))
+
IOCTL(HDIO_GETGEO, IOC_R, MK_PTR(MK_STRUCT(STRUCT_hd_geometry)))
IOCTL(HDIO_GET_UNMASKINTR, IOC_R, MK_PTR(TYPE_INT))
IOCTL(HDIO_GET_MULTCOUNT, IOC_R, MK_PTR(TYPE_INT))
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 274e10e0ee..8d27d10807 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -111,6 +111,7 @@
#include <linux/netlink.h>
#include <linux/if_alg.h>
#include <linux/rtc.h>
+#include <sound/asound.h>
#include "linux_loop.h"
#include "uname.h"
diff --git a/linux-user/syscall_defs.h b/linux-user/syscall_defs.h
index 9b61ae8547..eb00358b54 100644
--- a/linux-user/syscall_defs.h
+++ b/linux-user/syscall_defs.h
@@ -2437,6 +2437,11 @@ struct target_statfs64 {
#define TARGET_SOUND_MIXER_WRITE_RECSRC TARGET_MIXER_WRITE(SOUND_MIXER_RECSRC)
+/* alsa timer ioctls */
+#define TARGET_SNDRV_TIMER_IOCTL_PVERSION TARGET_IOR('T', 0x00, int)
+#define TARGET_SNDRV_TIMER_IOCTL_NEXT_DEVICE TARGET_IOWR('T', 0x01, \
+ struct snd_timer_id)
+
/* vfat ioctls */
#define TARGET_VFAT_IOCTL_READDIR_BOTH TARGET_IORU('r', 1)
#define TARGET_VFAT_IOCTL_READDIR_SHORT TARGET_IORU('r', 2)
diff --git a/linux-user/syscall_types.h b/linux-user/syscall_types.h
index 5ba4155047..4c3a65cfc0 100644
--- a/linux-user/syscall_types.h
+++ b/linux-user/syscall_types.h
@@ -83,6 +83,13 @@ STRUCT(buffmem_desc,
STRUCT(mixer_info,
MK_ARRAY(TYPE_CHAR, 16), MK_ARRAY(TYPE_CHAR, 32), TYPE_INT, MK_ARRAY(TYPE_INT, 10))
+STRUCT(snd_timer_id,
+ TYPE_INT, /* dev_class */
+ TYPE_INT, /* dev_sclass */
+ TYPE_INT, /* card */
+ TYPE_INT, /* device */
+ TYPE_INT) /* subdevice */
+
/* loop device ioctls */
STRUCT(loop_info,
TYPE_INT, /* lo_number */