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-rw-r--r--sound/firewire/fcp.c189
1 files changed, 182 insertions, 7 deletions
diff --git a/sound/firewire/fcp.c b/sound/firewire/fcp.c
index 860c08073c59..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);
@@ -30,6 +184,7 @@ enum fcp_state {
STATE_PENDING,
STATE_BUS_RESET,
STATE_COMPLETE,
+ STATE_DEFERRED,
};
struct fcp_transaction {
@@ -40,6 +195,7 @@ struct fcp_transaction {
unsigned int response_match_bytes;
enum fcp_state state;
wait_queue_head_t wait;
+ bool deferrable;
};
/**
@@ -81,6 +237,9 @@ int fcp_avc_transaction(struct fw_unit *unit,
t.state = STATE_PENDING;
init_waitqueue_head(&t.wait);
+ if (*(const u8 *)command == 0x00 || *(const u8 *)command == 0x03)
+ t.deferrable = true;
+
spin_lock_irq(&transactions_lock);
list_add_tail(&t.list, &transactions);
spin_unlock_irq(&transactions_lock);
@@ -93,11 +252,21 @@ int fcp_avc_transaction(struct fw_unit *unit,
(void *)command, command_size, 0);
if (ret < 0)
break;
-
+deferred:
wait_event_timeout(t.wait, t.state != STATE_PENDING,
msecs_to_jiffies(FCP_TIMEOUT_MS));
- if (t.state == STATE_COMPLETE) {
+ if (t.state == STATE_DEFERRED) {
+ /*
+ * 'AV/C General Specification' define no time limit
+ * on command completion once an INTERIM response has
+ * been sent. but we promise to finish this function
+ * for a caller. Here we use FCP_TIMEOUT_MS for next
+ * interval. This is not in the specification.
+ */
+ t.state = STATE_PENDING;
+ goto deferred;
+ } else if (t.state == STATE_COMPLETE) {
ret = t.response_size;
break;
} else if (t.state == STATE_BUS_RESET) {
@@ -132,7 +301,8 @@ void fcp_bus_reset(struct fw_unit *unit)
spin_lock_irq(&transactions_lock);
list_for_each_entry(t, &transactions, list) {
if (t->unit == unit &&
- t->state == STATE_PENDING) {
+ (t->state == STATE_PENDING ||
+ t->state == STATE_DEFERRED)) {
t->state = STATE_BUS_RESET;
wake_up(&t->wait);
}
@@ -186,10 +356,15 @@ static void fcp_response(struct fw_card *card, struct fw_request *request,
if (t->state == STATE_PENDING &&
is_matching_response(t, data, length)) {
- t->state = STATE_COMPLETE;
- t->response_size = min((unsigned int)length,
- t->response_size);
- memcpy(t->response_buffer, data, t->response_size);
+ if (t->deferrable && *(const u8 *)data == 0x0f) {
+ t->state = STATE_DEFERRED;
+ } else {
+ t->state = STATE_COMPLETE;
+ t->response_size = min_t(unsigned int, length,
+ t->response_size);
+ memcpy(t->response_buffer, data,
+ t->response_size);
+ }
wake_up(&t->wait);
}
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-20 19:54:15 +0100