linux/sound/firewire/fireworks/fireworks_command.c

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/*
* fireworks_command.c - a part of driver for Fireworks based devices
*
* Copyright (c) 2013-2014 Takashi Sakamoto
*
* Licensed under the terms of the GNU General Public License, version 2.
*/
#include "./fireworks.h"
/*
* This driver uses transaction version 1 or later to use extended hardware
* information. Then too old devices are not available.
*
* Each commands are not required to have continuous sequence numbers. This
* number is just used to match command and response.
*
* This module support a part of commands. Please see FFADO if you want to see
* whole commands. But there are some commands which FFADO don't implement.
*
* Fireworks also supports AV/C general commands and AV/C Stream Format
* Information commands. But this module don't use them.
*/
ALSA: fireworks: Add command/response functionality into hwdep interface This commit adds two functionality for hwdep interface, adds two parameters for this driver, add a node for proc interface. To receive responses from devices, this driver already allocate own callback into initial memory space in host controller. This means no one can allocate its own callback to the address. So this driver must give a way for user applications to receive responses. This commit adds a functionality to receive responses via hwdep interface. The application can receive responses to read from this interface. To achieve this, this commit adds a buffer to queue responses. The default size of this buffer is 1024 bytes. This size can be changed to give preferrable size to 'resp_buf_size' parameter for this driver. The application should notice rest of space in this buffer because this driver don't push responses when this buffer has no space. Additionaly, this commit adds a functionality to transmit commands via hwdep interface. The application can transmit commands to write into this interface. I note that the application can transmit one command at once, but can receive as many responses as possible untill the user-buffer is full. When using these interfaces, the application must keep maximum number of sequence number in command within the number in firewire.h because this driver uses this number to distinguish the response is against the command by the application or this driver. Usually responses against commands which the application transmits are pushed into this buffer. But to enable 'resp_buf_debug' parameter for this driver, all responses are pushed into the buffer. When using this mode, I reccomend to expand the size of buffer. Finally this commit adds a new node into proc interface to output status of the buffer. Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2014-04-25 21:45:13 +08:00
#define KERNEL_SEQNUM_MIN (SND_EFW_TRANSACTION_USER_SEQNUM_MAX + 2)
#define KERNEL_SEQNUM_MAX ((u32)~0)
/* for clock source and sampling rate */
struct efc_clock {
u32 source;
u32 sampling_rate;
u32 index;
};
/* command categories */
enum efc_category {
EFC_CAT_HWINFO = 0,
EFC_CAT_TRANSPORT = 2,
EFC_CAT_HWCTL = 3,
};
/* hardware info category commands */
enum efc_cmd_hwinfo {
EFC_CMD_HWINFO_GET_CAPS = 0,
EFC_CMD_HWINFO_GET_POLLED = 1,
EFC_CMD_HWINFO_SET_RESP_ADDR = 2
};
enum efc_cmd_transport {
EFC_CMD_TRANSPORT_SET_TX_MODE = 0
};
/* hardware control category commands */
enum efc_cmd_hwctl {
EFC_CMD_HWCTL_SET_CLOCK = 0,
EFC_CMD_HWCTL_GET_CLOCK = 1,
EFC_CMD_HWCTL_IDENTIFY = 5
};
/* return values in response */
enum efr_status {
EFR_STATUS_OK = 0,
EFR_STATUS_BAD = 1,
EFR_STATUS_BAD_COMMAND = 2,
EFR_STATUS_COMM_ERR = 3,
EFR_STATUS_BAD_QUAD_COUNT = 4,
EFR_STATUS_UNSUPPORTED = 5,
EFR_STATUS_1394_TIMEOUT = 6,
EFR_STATUS_DSP_TIMEOUT = 7,
EFR_STATUS_BAD_RATE = 8,
EFR_STATUS_BAD_CLOCK = 9,
EFR_STATUS_BAD_CHANNEL = 10,
EFR_STATUS_BAD_PAN = 11,
EFR_STATUS_FLASH_BUSY = 12,
EFR_STATUS_BAD_MIRROR = 13,
EFR_STATUS_BAD_LED = 14,
EFR_STATUS_BAD_PARAMETER = 15,
EFR_STATUS_INCOMPLETE = 0x80000000
};
static const char *const efr_status_names[] = {
[EFR_STATUS_OK] = "OK",
[EFR_STATUS_BAD] = "bad",
[EFR_STATUS_BAD_COMMAND] = "bad command",
[EFR_STATUS_COMM_ERR] = "comm err",
[EFR_STATUS_BAD_QUAD_COUNT] = "bad quad count",
[EFR_STATUS_UNSUPPORTED] = "unsupported",
[EFR_STATUS_1394_TIMEOUT] = "1394 timeout",
[EFR_STATUS_DSP_TIMEOUT] = "DSP timeout",
[EFR_STATUS_BAD_RATE] = "bad rate",
[EFR_STATUS_BAD_CLOCK] = "bad clock",
[EFR_STATUS_BAD_CHANNEL] = "bad channel",
[EFR_STATUS_BAD_PAN] = "bad pan",
[EFR_STATUS_FLASH_BUSY] = "flash busy",
[EFR_STATUS_BAD_MIRROR] = "bad mirror",
[EFR_STATUS_BAD_LED] = "bad LED",
[EFR_STATUS_BAD_PARAMETER] = "bad parameter",
[EFR_STATUS_BAD_PARAMETER + 1] = "incomplete"
};
static int
efw_transaction(struct snd_efw *efw, unsigned int category,
unsigned int command,
const __be32 *params, unsigned int param_bytes,
const __be32 *resp, unsigned int resp_bytes)
{
struct snd_efw_transaction *header;
__be32 *buf;
u32 seqnum;
unsigned int buf_bytes, cmd_bytes;
int err;
/* calculate buffer size*/
buf_bytes = sizeof(struct snd_efw_transaction) +
max(param_bytes, resp_bytes);
/* keep buffer */
buf = kzalloc(buf_bytes, GFP_KERNEL);
if (buf == NULL)
return -ENOMEM;
/* to keep consistency of sequence number */
spin_lock(&efw->lock);
ALSA: fireworks: Add command/response functionality into hwdep interface This commit adds two functionality for hwdep interface, adds two parameters for this driver, add a node for proc interface. To receive responses from devices, this driver already allocate own callback into initial memory space in host controller. This means no one can allocate its own callback to the address. So this driver must give a way for user applications to receive responses. This commit adds a functionality to receive responses via hwdep interface. The application can receive responses to read from this interface. To achieve this, this commit adds a buffer to queue responses. The default size of this buffer is 1024 bytes. This size can be changed to give preferrable size to 'resp_buf_size' parameter for this driver. The application should notice rest of space in this buffer because this driver don't push responses when this buffer has no space. Additionaly, this commit adds a functionality to transmit commands via hwdep interface. The application can transmit commands to write into this interface. I note that the application can transmit one command at once, but can receive as many responses as possible untill the user-buffer is full. When using these interfaces, the application must keep maximum number of sequence number in command within the number in firewire.h because this driver uses this number to distinguish the response is against the command by the application or this driver. Usually responses against commands which the application transmits are pushed into this buffer. But to enable 'resp_buf_debug' parameter for this driver, all responses are pushed into the buffer. When using this mode, I reccomend to expand the size of buffer. Finally this commit adds a new node into proc interface to output status of the buffer. Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2014-04-25 21:45:13 +08:00
if ((efw->seqnum < KERNEL_SEQNUM_MIN) ||
(efw->seqnum >= KERNEL_SEQNUM_MAX - 2))
efw->seqnum = KERNEL_SEQNUM_MIN;
else
efw->seqnum += 2;
seqnum = efw->seqnum;
spin_unlock(&efw->lock);
/* fill transaction header fields */
cmd_bytes = sizeof(struct snd_efw_transaction) + param_bytes;
header = (struct snd_efw_transaction *)buf;
header->length = cpu_to_be32(cmd_bytes / sizeof(__be32));
header->version = cpu_to_be32(1);
header->seqnum = cpu_to_be32(seqnum);
header->category = cpu_to_be32(category);
header->command = cpu_to_be32(command);
header->status = 0;
/* fill transaction command parameters */
memcpy(header->params, params, param_bytes);
err = snd_efw_transaction_run(efw->unit, buf, cmd_bytes,
buf, buf_bytes);
if (err < 0)
goto end;
/* check transaction header fields */
if ((be32_to_cpu(header->version) < 1) ||
(be32_to_cpu(header->category) != category) ||
(be32_to_cpu(header->command) != command) ||
(be32_to_cpu(header->status) != EFR_STATUS_OK)) {
dev_err(&efw->unit->device, "EFW command failed [%u/%u]: %s\n",
be32_to_cpu(header->category),
be32_to_cpu(header->command),
efr_status_names[be32_to_cpu(header->status)]);
err = -EIO;
goto end;
}
if (resp == NULL)
goto end;
/* fill transaction response parameters */
memset((void *)resp, 0, resp_bytes);
resp_bytes = min_t(unsigned int, resp_bytes,
be32_to_cpu(header->length) * sizeof(__be32) -
sizeof(struct snd_efw_transaction));
memcpy((void *)resp, &buf[6], resp_bytes);
end:
kfree(buf);
return err;
}
/*
* The address in host system for transaction response is changable when the
* device supports. struct hwinfo.flags includes its flag. The default is
* MEMORY_SPACE_EFW_RESPONSE.
*/
int snd_efw_command_set_resp_addr(struct snd_efw *efw,
u16 addr_high, u32 addr_low)
{
__be32 addr[2];
addr[0] = cpu_to_be32(addr_high);
addr[1] = cpu_to_be32(addr_low);
if (!efw->resp_addr_changable)
return -ENOSYS;
return efw_transaction(efw, EFC_CAT_HWCTL,
EFC_CMD_HWINFO_SET_RESP_ADDR,
addr, sizeof(addr), NULL, 0);
}
/*
* This is for timestamp processing. In Windows mode, all 32bit fields of second
* CIP header in AMDTP transmit packet is used for 'presentation timestamp'. In
* 'no data' packet the value of this field is 0x90ffffff.
*/
int snd_efw_command_set_tx_mode(struct snd_efw *efw,
enum snd_efw_transport_mode mode)
{
__be32 param = cpu_to_be32(mode);
return efw_transaction(efw, EFC_CAT_TRANSPORT,
EFC_CMD_TRANSPORT_SET_TX_MODE,
&param, sizeof(param), NULL, 0);
}
int snd_efw_command_get_hwinfo(struct snd_efw *efw,
struct snd_efw_hwinfo *hwinfo)
{
int err;
err = efw_transaction(efw, EFC_CAT_HWINFO,
EFC_CMD_HWINFO_GET_CAPS,
NULL, 0, (__be32 *)hwinfo, sizeof(*hwinfo));
if (err < 0)
goto end;
be32_to_cpus(&hwinfo->flags);
be32_to_cpus(&hwinfo->guid_hi);
be32_to_cpus(&hwinfo->guid_lo);
be32_to_cpus(&hwinfo->type);
be32_to_cpus(&hwinfo->version);
be32_to_cpus(&hwinfo->supported_clocks);
be32_to_cpus(&hwinfo->amdtp_rx_pcm_channels);
be32_to_cpus(&hwinfo->amdtp_tx_pcm_channels);
be32_to_cpus(&hwinfo->phys_out);
be32_to_cpus(&hwinfo->phys_in);
be32_to_cpus(&hwinfo->phys_out_grp_count);
be32_to_cpus(&hwinfo->phys_in_grp_count);
be32_to_cpus(&hwinfo->midi_out_ports);
be32_to_cpus(&hwinfo->midi_in_ports);
be32_to_cpus(&hwinfo->max_sample_rate);
be32_to_cpus(&hwinfo->min_sample_rate);
be32_to_cpus(&hwinfo->dsp_version);
be32_to_cpus(&hwinfo->arm_version);
be32_to_cpus(&hwinfo->mixer_playback_channels);
be32_to_cpus(&hwinfo->mixer_capture_channels);
be32_to_cpus(&hwinfo->fpga_version);
be32_to_cpus(&hwinfo->amdtp_rx_pcm_channels_2x);
be32_to_cpus(&hwinfo->amdtp_tx_pcm_channels_2x);
be32_to_cpus(&hwinfo->amdtp_rx_pcm_channels_4x);
be32_to_cpus(&hwinfo->amdtp_tx_pcm_channels_4x);
/* ensure terminated */
hwinfo->vendor_name[HWINFO_NAME_SIZE_BYTES - 1] = '\0';
hwinfo->model_name[HWINFO_NAME_SIZE_BYTES - 1] = '\0';
end:
return err;
}
int snd_efw_command_get_phys_meters(struct snd_efw *efw,
struct snd_efw_phys_meters *meters,
unsigned int len)
{
u32 *buf = (u32 *)meters;
unsigned int i;
int err;
err = efw_transaction(efw, EFC_CAT_HWINFO,
EFC_CMD_HWINFO_GET_POLLED,
NULL, 0, (__be32 *)meters, len);
if (err >= 0)
for (i = 0; i < len / sizeof(u32); i++)
be32_to_cpus(&buf[i]);
return err;
}
static int
command_get_clock(struct snd_efw *efw, struct efc_clock *clock)
{
int err;
err = efw_transaction(efw, EFC_CAT_HWCTL,
EFC_CMD_HWCTL_GET_CLOCK,
NULL, 0,
(__be32 *)clock, sizeof(struct efc_clock));
if (err >= 0) {
be32_to_cpus(&clock->source);
be32_to_cpus(&clock->sampling_rate);
be32_to_cpus(&clock->index);
}
return err;
}
/* give UINT_MAX if set nothing */
static int
command_set_clock(struct snd_efw *efw,
unsigned int source, unsigned int rate)
{
struct efc_clock clock = {0};
int err;
/* check arguments */
if ((source == UINT_MAX) && (rate == UINT_MAX)) {
err = -EINVAL;
goto end;
}
/* get current status */
err = command_get_clock(efw, &clock);
if (err < 0)
goto end;
/* no need */
if ((clock.source == source) && (clock.sampling_rate == rate))
goto end;
/* set params */
if ((source != UINT_MAX) && (clock.source != source))
clock.source = source;
if ((rate != UINT_MAX) && (clock.sampling_rate != rate))
clock.sampling_rate = rate;
clock.index = 0;
cpu_to_be32s(&clock.source);
cpu_to_be32s(&clock.sampling_rate);
cpu_to_be32s(&clock.index);
err = efw_transaction(efw, EFC_CAT_HWCTL,
EFC_CMD_HWCTL_SET_CLOCK,
(__be32 *)&clock, sizeof(struct efc_clock),
NULL, 0);
if (err < 0)
goto end;
/*
* With firmware version 5.8, just after changing clock state, these
* parameters are not immediately retrieved by get command. In my
* trial, there needs to be 100msec to get changed parameters.
*/
msleep(150);
end:
return err;
}
int snd_efw_command_get_clock_source(struct snd_efw *efw,
enum snd_efw_clock_source *source)
{
int err;
struct efc_clock clock = {0};
err = command_get_clock(efw, &clock);
if (err >= 0)
*source = clock.source;
return err;
}
int snd_efw_command_get_sampling_rate(struct snd_efw *efw, unsigned int *rate)
{
int err;
struct efc_clock clock = {0};
err = command_get_clock(efw, &clock);
if (err >= 0)
*rate = clock.sampling_rate;
return err;
}
int snd_efw_command_set_sampling_rate(struct snd_efw *efw, unsigned int rate)
{
return command_set_clock(efw, UINT_MAX, rate);
}