summaryrefslogtreecommitdiffstats
path: root/sound/firewire/fcp.c
diff options
context:
space:
mode:
authorTakashi Sakamoto <o-takashi@sakamocchi.jp>2014-04-25 22:44:59 +0900
committerTakashi Iwai <tiwai@suse.de>2014-05-26 14:23:13 +0200
commit1017abed18ae7087e7f3e256c48421d09d83176e (patch)
treeb98d0848986364dd5bede66b9553da96a60fcfa1 /sound/firewire/fcp.c
parent00a7bb81c20f3e81711e28e0f6c08cee8fd18514 (diff)
downloadlinux-1017abed18ae7087e7f3e256c48421d09d83176e.tar.gz
linux-1017abed18ae7087e7f3e256c48421d09d83176e.tar.bz2
linux-1017abed18ae7087e7f3e256c48421d09d83176e.zip
ALSA: firewire-lib: Add some AV/C general commands
This commit adds three commands, which may be used by some firewire device drivers. These commands are defined in 'AV/C Digital Interface Command Set General Specification Version 4.2 (2004006, 1394TA)'. 1. PLUG INFO command (clause 10.1) 2. INPUT PLUG SIGNAL FORMAT command (clause 10.10) 3. OUTPUT PLUG SIGNAL FORMAT command (clause 10.11) By the command 1, the drivers can get the number of plugs for AV/C unit or subunit. By the command 2 and 3, the drivers can get/set sampling frequency. The 'firewire-speakers' already uses INPUT PLUG SIGNAL FORMAT command to set sampling rate. So this commit also affects the driver. Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/firewire/fcp.c')
-rw-r--r--sound/firewire/fcp.c154
1 files changed, 154 insertions, 0 deletions
diff --git a/sound/firewire/fcp.c b/sound/firewire/fcp.c
index 6876bfa9f27d..d48e326567c8 100644
--- a/sound/firewire/fcp.c
+++ b/sound/firewire/fcp.c
@@ -10,12 +10,14 @@
#include <linux/firewire-constants.h>
#include <linux/list.h>
#include <linux/module.h>
+#include <linux/slab.h>
#include <linux/sched.h>
#include <linux/spinlock.h>
#include <linux/wait.h>
#include <linux/delay.h>
#include "fcp.h"
#include "lib.h"
+#include "amdtp.h"
#define CTS_AVC 0x00
@@ -23,6 +25,158 @@
#define ERROR_DELAY_MS 5
#define FCP_TIMEOUT_MS 125
+int avc_general_set_sig_fmt(struct fw_unit *unit, unsigned int rate,
+ enum avc_general_plug_dir dir,
+ unsigned short pid)
+{
+ unsigned int sfc;
+ u8 *buf;
+ bool flag;
+ int err;
+
+ flag = false;
+ for (sfc = 0; sfc < CIP_SFC_COUNT; sfc++) {
+ if (amdtp_rate_table[sfc] == rate) {
+ flag = true;
+ break;
+ }
+ }
+ if (!flag)
+ return -EINVAL;
+
+ buf = kzalloc(8, GFP_KERNEL);
+ if (buf == NULL)
+ return -ENOMEM;
+
+ buf[0] = 0x00; /* AV/C CONTROL */
+ buf[1] = 0xff; /* UNIT */
+ if (dir == AVC_GENERAL_PLUG_DIR_IN)
+ buf[2] = 0x19; /* INPUT PLUG SIGNAL FORMAT */
+ else
+ buf[2] = 0x18; /* OUTPUT PLUG SIGNAL FORMAT */
+ buf[3] = 0xff & pid; /* plug id */
+ buf[4] = 0x90; /* EOH_1, Form_1, FMT. AM824 */
+ buf[5] = 0x07 & sfc; /* FDF-hi. AM824, frequency */
+ buf[6] = 0xff; /* FDF-mid. AM824, SYT hi (not used)*/
+ buf[7] = 0xff; /* FDF-low. AM824, SYT lo (not used) */
+
+ /* do transaction and check buf[1-5] are the same against command */
+ err = fcp_avc_transaction(unit, buf, 8, buf, 8,
+ BIT(1) | BIT(2) | BIT(3) | BIT(4) | BIT(5));
+ if (err >= 0 && err < 8)
+ err = -EIO;
+ else if (buf[0] == 0x08) /* NOT IMPLEMENTED */
+ err = -ENOSYS;
+ else if (buf[0] == 0x0a) /* REJECTED */
+ err = -EINVAL;
+ if (err < 0)
+ goto end;
+
+ err = 0;
+end:
+ kfree(buf);
+ return err;
+}
+EXPORT_SYMBOL(avc_general_set_sig_fmt);
+
+int avc_general_get_sig_fmt(struct fw_unit *unit, unsigned int *rate,
+ enum avc_general_plug_dir dir,
+ unsigned short pid)
+{
+ unsigned int sfc;
+ u8 *buf;
+ int err;
+
+ buf = kzalloc(8, GFP_KERNEL);
+ if (buf == NULL)
+ return -ENOMEM;
+
+ buf[0] = 0x01; /* AV/C STATUS */
+ buf[1] = 0xff; /* Unit */
+ if (dir == AVC_GENERAL_PLUG_DIR_IN)
+ buf[2] = 0x19; /* INPUT PLUG SIGNAL FORMAT */
+ else
+ buf[2] = 0x18; /* OUTPUT PLUG SIGNAL FORMAT */
+ buf[3] = 0xff & pid; /* plug id */
+ buf[4] = 0x90; /* EOH_1, Form_1, FMT. AM824 */
+ buf[5] = 0xff; /* FDF-hi. AM824, frequency */
+ buf[6] = 0xff; /* FDF-mid. AM824, SYT hi (not used) */
+ buf[7] = 0xff; /* FDF-low. AM824, SYT lo (not used) */
+
+ /* do transaction and check buf[1-4] are the same against command */
+ err = fcp_avc_transaction(unit, buf, 8, buf, 8,
+ BIT(1) | BIT(2) | BIT(3) | BIT(4));
+ if (err >= 0 && err < 8)
+ err = -EIO;
+ else if (buf[0] == 0x08) /* NOT IMPLEMENTED */
+ err = -ENOSYS;
+ else if (buf[0] == 0x0a) /* REJECTED */
+ err = -EINVAL;
+ else if (buf[0] == 0x0b) /* IN TRANSITION */
+ err = -EAGAIN;
+ if (err < 0)
+ goto end;
+
+ /* check sfc field and pick up rate */
+ sfc = 0x07 & buf[5];
+ if (sfc >= CIP_SFC_COUNT) {
+ err = -EAGAIN; /* also in transition */
+ goto end;
+ }
+
+ *rate = amdtp_rate_table[sfc];
+ err = 0;
+end:
+ kfree(buf);
+ return err;
+}
+EXPORT_SYMBOL(avc_general_get_sig_fmt);
+
+int avc_general_get_plug_info(struct fw_unit *unit, unsigned int subunit_type,
+ unsigned int subunit_id, unsigned int subfunction,
+ u8 info[AVC_PLUG_INFO_BUF_BYTES])
+{
+ u8 *buf;
+ int err;
+
+ /* extended subunit in spec.4.2 is not supported */
+ if ((subunit_type == 0x1E) || (subunit_id == 5))
+ return -EINVAL;
+
+ buf = kzalloc(8, GFP_KERNEL);
+ if (buf == NULL)
+ return -ENOMEM;
+
+ buf[0] = 0x01; /* AV/C STATUS */
+ /* UNIT or Subunit, Functionblock */
+ buf[1] = ((subunit_type & 0x1f) << 3) | (subunit_id & 0x7);
+ buf[2] = 0x02; /* PLUG INFO */
+ buf[3] = 0xff & subfunction;
+
+ err = fcp_avc_transaction(unit, buf, 8, buf, 8, BIT(1) | BIT(2));
+ if (err >= 0 && err < 8)
+ err = -EIO;
+ else if (buf[0] == 0x08) /* NOT IMPLEMENTED */
+ err = -ENOSYS;
+ else if (buf[0] == 0x0a) /* REJECTED */
+ err = -EINVAL;
+ else if (buf[0] == 0x0b) /* IN TRANSITION */
+ err = -EAGAIN;
+ if (err < 0)
+ goto end;
+
+ info[0] = buf[4];
+ info[1] = buf[5];
+ info[2] = buf[6];
+ info[3] = buf[7];
+
+ err = 0;
+end:
+ kfree(buf);
+ return err;
+}
+EXPORT_SYMBOL(avc_general_get_plug_info);
+
static DEFINE_SPINLOCK(transactions_lock);
static LIST_HEAD(transactions);