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linux-stable/sound/pci/lx6464es/lx_core.c
Takashi Iwai a19c921fca ALSA: lx646es: Fix possible uninitialized variable reference 
lx_pipe_state() checks the return value from lx_message_send_atomic()
and breaks the loop only when it's a negative value.  However,
lx_message_send_atomic() may return a positive error code (as the
return code from the hardware), and then lx_pipe_state() tries to
compare the uninitialized current_state variable.

Fix this behavior by checking the positive non-zero error code as
well.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2016-04-15 15:28:52 +02:00

1198 lines
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/* -*- linux-c -*- *
*
* ALSA driver for the digigram lx6464es interface
* low-level interface
*
* Copyright (c) 2009 Tim Blechmann <tim@klingt.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*
*/
/* #define RMH_DEBUG 1 */
#include <linux/bitops.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/delay.h>
#include "lx6464es.h"
#include "lx_core.h"
/* low-level register access */
static const unsigned long dsp_port_offsets[] = {
0,
0x400,
0x401,
0x402,
0x403,
0x404,
0x405,
0x406,
0x407,
0x408,
0x409,
0x40a,
0x40b,
0x40c,
0x410,
0x411,
0x412,
0x413,
0x414,
0x415,
0x416,
0x420,
0x430,
0x431,
0x432,
0x433,
0x434,
0x440
};
static void __iomem *lx_dsp_register(struct lx6464es *chip, int port)
{
void __iomem *base_address = chip->port_dsp_bar;
return base_address + dsp_port_offsets[port]*4;
}
unsigned long lx_dsp_reg_read(struct lx6464es *chip, int port)
{
void __iomem *address = lx_dsp_register(chip, port);
return ioread32(address);
}
static void lx_dsp_reg_readbuf(struct lx6464es *chip, int port, u32 *data,
u32 len)
{
u32 __iomem *address = lx_dsp_register(chip, port);
int i;
/* we cannot use memcpy_fromio */
for (i = 0; i != len; ++i)
data[i] = ioread32(address + i);
}
void lx_dsp_reg_write(struct lx6464es *chip, int port, unsigned data)
{
void __iomem *address = lx_dsp_register(chip, port);
iowrite32(data, address);
}
static void lx_dsp_reg_writebuf(struct lx6464es *chip, int port,
const u32 *data, u32 len)
{
u32 __iomem *address = lx_dsp_register(chip, port);
int i;
/* we cannot use memcpy_to */
for (i = 0; i != len; ++i)
iowrite32(data[i], address + i);
}
static const unsigned long plx_port_offsets[] = {
0x04,
0x40,
0x44,
0x48,
0x4c,
0x50,
0x54,
0x58,
0x5c,
0x64,
0x68,
0x6C
};
static void __iomem *lx_plx_register(struct lx6464es *chip, int port)
{
void __iomem *base_address = chip->port_plx_remapped;
return base_address + plx_port_offsets[port];
}
unsigned long lx_plx_reg_read(struct lx6464es *chip, int port)
{
void __iomem *address = lx_plx_register(chip, port);
return ioread32(address);
}
void lx_plx_reg_write(struct lx6464es *chip, int port, u32 data)
{
void __iomem *address = lx_plx_register(chip, port);
iowrite32(data, address);
}
/* rmh */
#ifdef CONFIG_SND_DEBUG
#define CMD_NAME(a) a
#else
#define CMD_NAME(a) NULL
#endif
#define Reg_CSM_MR 0x00000002
#define Reg_CSM_MC 0x00000001
struct dsp_cmd_info {
u32 dcCodeOp; /* Op Code of the command (usually 1st 24-bits
* word).*/
u16 dcCmdLength; /* Command length in words of 24 bits.*/
u16 dcStatusType; /* Status type: 0 for fixed length, 1 for
* random. */
u16 dcStatusLength; /* Status length (if fixed).*/
char *dcOpName;
};
/*
Initialization and control data for the Microblaze interface
- OpCode:
the opcode field of the command set at the proper offset
- CmdLength
the number of command words
- StatusType
offset in the status registers: 0 means that the return value may be
different from 0, and must be read
- StatusLength
the number of status words (in addition to the return value)
*/
static struct dsp_cmd_info dsp_commands[] =
{
{ (CMD_00_INFO_DEBUG << OPCODE_OFFSET) , 1 /*custom*/
, 1 , 0 /**/ , CMD_NAME("INFO_DEBUG") },
{ (CMD_01_GET_SYS_CFG << OPCODE_OFFSET) , 1 /**/
, 1 , 2 /**/ , CMD_NAME("GET_SYS_CFG") },
{ (CMD_02_SET_GRANULARITY << OPCODE_OFFSET) , 1 /**/
, 1 , 0 /**/ , CMD_NAME("SET_GRANULARITY") },
{ (CMD_03_SET_TIMER_IRQ << OPCODE_OFFSET) , 1 /**/
, 1 , 0 /**/ , CMD_NAME("SET_TIMER_IRQ") },
{ (CMD_04_GET_EVENT << OPCODE_OFFSET) , 1 /**/
, 1 , 0 /*up to 10*/ , CMD_NAME("GET_EVENT") },
{ (CMD_05_GET_PIPES << OPCODE_OFFSET) , 1 /**/
, 1 , 2 /*up to 4*/ , CMD_NAME("GET_PIPES") },
{ (CMD_06_ALLOCATE_PIPE << OPCODE_OFFSET) , 1 /**/
, 0 , 0 /**/ , CMD_NAME("ALLOCATE_PIPE") },
{ (CMD_07_RELEASE_PIPE << OPCODE_OFFSET) , 1 /**/
, 0 , 0 /**/ , CMD_NAME("RELEASE_PIPE") },
{ (CMD_08_ASK_BUFFERS << OPCODE_OFFSET) , 1 /**/
, 1 , MAX_STREAM_BUFFER , CMD_NAME("ASK_BUFFERS") },
{ (CMD_09_STOP_PIPE << OPCODE_OFFSET) , 1 /**/
, 0 , 0 /*up to 2*/ , CMD_NAME("STOP_PIPE") },
{ (CMD_0A_GET_PIPE_SPL_COUNT << OPCODE_OFFSET) , 1 /**/
, 1 , 1 /*up to 2*/ , CMD_NAME("GET_PIPE_SPL_COUNT") },
{ (CMD_0B_TOGGLE_PIPE_STATE << OPCODE_OFFSET) , 1 /*up to 5*/
, 1 , 0 /**/ , CMD_NAME("TOGGLE_PIPE_STATE") },
{ (CMD_0C_DEF_STREAM << OPCODE_OFFSET) , 1 /*up to 4*/
, 1 , 0 /**/ , CMD_NAME("DEF_STREAM") },
{ (CMD_0D_SET_MUTE << OPCODE_OFFSET) , 3 /**/
, 1 , 0 /**/ , CMD_NAME("SET_MUTE") },
{ (CMD_0E_GET_STREAM_SPL_COUNT << OPCODE_OFFSET) , 1/**/
, 1 , 2 /**/ , CMD_NAME("GET_STREAM_SPL_COUNT") },
{ (CMD_0F_UPDATE_BUFFER << OPCODE_OFFSET) , 3 /*up to 4*/
, 0 , 1 /**/ , CMD_NAME("UPDATE_BUFFER") },
{ (CMD_10_GET_BUFFER << OPCODE_OFFSET) , 1 /**/
, 1 , 4 /**/ , CMD_NAME("GET_BUFFER") },
{ (CMD_11_CANCEL_BUFFER << OPCODE_OFFSET) , 1 /**/
, 1 , 1 /*up to 4*/ , CMD_NAME("CANCEL_BUFFER") },
{ (CMD_12_GET_PEAK << OPCODE_OFFSET) , 1 /**/
, 1 , 1 /**/ , CMD_NAME("GET_PEAK") },
{ (CMD_13_SET_STREAM_STATE << OPCODE_OFFSET) , 1 /**/
, 1 , 0 /**/ , CMD_NAME("SET_STREAM_STATE") },
};
static void lx_message_init(struct lx_rmh *rmh, enum cmd_mb_opcodes cmd)
{
snd_BUG_ON(cmd >= CMD_14_INVALID);
rmh->cmd[0] = dsp_commands[cmd].dcCodeOp;
rmh->cmd_len = dsp_commands[cmd].dcCmdLength;
rmh->stat_len = dsp_commands[cmd].dcStatusLength;
rmh->dsp_stat = dsp_commands[cmd].dcStatusType;
rmh->cmd_idx = cmd;
memset(&rmh->cmd[1], 0, (REG_CRM_NUMBER - 1) * sizeof(u32));
#ifdef CONFIG_SND_DEBUG
memset(rmh->stat, 0, REG_CRM_NUMBER * sizeof(u32));
#endif
#ifdef RMH_DEBUG
rmh->cmd_idx = cmd;
#endif
}
#ifdef RMH_DEBUG
#define LXRMH "lx6464es rmh: "
static void lx_message_dump(struct lx_rmh *rmh)
{
u8 idx = rmh->cmd_idx;
int i;
snd_printk(LXRMH "command %s\n", dsp_commands[idx].dcOpName);
for (i = 0; i != rmh->cmd_len; ++i)
snd_printk(LXRMH "\tcmd[%d] %08x\n", i, rmh->cmd[i]);
for (i = 0; i != rmh->stat_len; ++i)
snd_printk(LXRMH "\tstat[%d]: %08x\n", i, rmh->stat[i]);
snd_printk("\n");
}
#else
static inline void lx_message_dump(struct lx_rmh *rmh)
{}
#endif
/* sleep 500 - 100 = 400 times 100us -> the timeout is >= 40 ms */
#define XILINX_TIMEOUT_MS 40
#define XILINX_POLL_NO_SLEEP 100
#define XILINX_POLL_ITERATIONS 150
static int lx_message_send_atomic(struct lx6464es *chip, struct lx_rmh *rmh)
{
u32 reg = ED_DSP_TIMED_OUT;
int dwloop;
if (lx_dsp_reg_read(chip, eReg_CSM) & (Reg_CSM_MC | Reg_CSM_MR)) {
dev_err(chip->card->dev, "PIOSendMessage eReg_CSM %x\n", reg);
return -EBUSY;
}
/* write command */
lx_dsp_reg_writebuf(chip, eReg_CRM1, rmh->cmd, rmh->cmd_len);
/* MicoBlaze gogogo */
lx_dsp_reg_write(chip, eReg_CSM, Reg_CSM_MC);
/* wait for device to answer */
for (dwloop = 0; dwloop != XILINX_TIMEOUT_MS * 1000; ++dwloop) {
if (lx_dsp_reg_read(chip, eReg_CSM) & Reg_CSM_MR) {
if (rmh->dsp_stat == 0)
reg = lx_dsp_reg_read(chip, eReg_CRM1);
else
reg = 0;
goto polling_successful;
} else
udelay(1);
}
dev_warn(chip->card->dev, "TIMEOUT lx_message_send_atomic! "
"polling failed\n");
polling_successful:
if ((reg & ERROR_VALUE) == 0) {
/* read response */
if (rmh->stat_len) {
snd_BUG_ON(rmh->stat_len >= (REG_CRM_NUMBER-1));
lx_dsp_reg_readbuf(chip, eReg_CRM2, rmh->stat,
rmh->stat_len);
}
} else
dev_err(chip->card->dev, "rmh error: %08x\n", reg);
/* clear Reg_CSM_MR */
lx_dsp_reg_write(chip, eReg_CSM, 0);
switch (reg) {
case ED_DSP_TIMED_OUT:
dev_warn(chip->card->dev, "lx_message_send: dsp timeout\n");
return -ETIMEDOUT;
case ED_DSP_CRASHED:
dev_warn(chip->card->dev, "lx_message_send: dsp crashed\n");
return -EAGAIN;
}
lx_message_dump(rmh);
return reg;
}
/* low-level dsp access */
int lx_dsp_get_version(struct lx6464es *chip, u32 *rdsp_version)
{
u16 ret;
mutex_lock(&chip->msg_lock);
lx_message_init(&chip->rmh, CMD_01_GET_SYS_CFG);
ret = lx_message_send_atomic(chip, &chip->rmh);
*rdsp_version = chip->rmh.stat[1];
mutex_unlock(&chip->msg_lock);
return ret;
}
int lx_dsp_get_clock_frequency(struct lx6464es *chip, u32 *rfreq)
{
u16 ret = 0;
u32 freq_raw = 0;
u32 freq = 0;
u32 frequency = 0;
mutex_lock(&chip->msg_lock);
lx_message_init(&chip->rmh, CMD_01_GET_SYS_CFG);
ret = lx_message_send_atomic(chip, &chip->rmh);
if (ret == 0) {
freq_raw = chip->rmh.stat[0] >> FREQ_FIELD_OFFSET;
freq = freq_raw & XES_FREQ_COUNT8_MASK;
if ((freq < XES_FREQ_COUNT8_48_MAX) ||
(freq > XES_FREQ_COUNT8_44_MIN))
frequency = 0; /* unknown */
else if (freq >= XES_FREQ_COUNT8_44_MAX)
frequency = 44100;
else
frequency = 48000;
}
mutex_unlock(&chip->msg_lock);
*rfreq = frequency * chip->freq_ratio;
return ret;
}
int lx_dsp_get_mac(struct lx6464es *chip)
{
u32 macmsb, maclsb;
macmsb = lx_dsp_reg_read(chip, eReg_ADMACESMSB) & 0x00FFFFFF;
maclsb = lx_dsp_reg_read(chip, eReg_ADMACESLSB) & 0x00FFFFFF;
/* todo: endianess handling */
chip->mac_address[5] = ((u8 *)(&maclsb))[0];
chip->mac_address[4] = ((u8 *)(&maclsb))[1];
chip->mac_address[3] = ((u8 *)(&maclsb))[2];
chip->mac_address[2] = ((u8 *)(&macmsb))[0];
chip->mac_address[1] = ((u8 *)(&macmsb))[1];
chip->mac_address[0] = ((u8 *)(&macmsb))[2];
return 0;
}
int lx_dsp_set_granularity(struct lx6464es *chip, u32 gran)
{
int ret;
mutex_lock(&chip->msg_lock);
lx_message_init(&chip->rmh, CMD_02_SET_GRANULARITY);
chip->rmh.cmd[0] |= gran;
ret = lx_message_send_atomic(chip, &chip->rmh);
mutex_unlock(&chip->msg_lock);
return ret;
}
int lx_dsp_read_async_events(struct lx6464es *chip, u32 *data)
{
int ret;
mutex_lock(&chip->msg_lock);
lx_message_init(&chip->rmh, CMD_04_GET_EVENT);
chip->rmh.stat_len = 9; /* we don't necessarily need the full length */
ret = lx_message_send_atomic(chip, &chip->rmh);
if (!ret)
memcpy(data, chip->rmh.stat, chip->rmh.stat_len * sizeof(u32));
mutex_unlock(&chip->msg_lock);
return ret;
}
#define PIPE_INFO_TO_CMD(capture, pipe) \
((u32)((u32)(pipe) | ((capture) ? ID_IS_CAPTURE : 0L)) << ID_OFFSET)
/* low-level pipe handling */
int lx_pipe_allocate(struct lx6464es *chip, u32 pipe, int is_capture,
int channels)
{
int err;
u32 pipe_cmd = PIPE_INFO_TO_CMD(is_capture, pipe);
mutex_lock(&chip->msg_lock);
lx_message_init(&chip->rmh, CMD_06_ALLOCATE_PIPE);
chip->rmh.cmd[0] |= pipe_cmd;
chip->rmh.cmd[0] |= channels;
err = lx_message_send_atomic(chip, &chip->rmh);
mutex_unlock(&chip->msg_lock);
if (err != 0)
dev_err(chip->card->dev, "could not allocate pipe\n");
return err;
}
int lx_pipe_release(struct lx6464es *chip, u32 pipe, int is_capture)
{
int err;
u32 pipe_cmd = PIPE_INFO_TO_CMD(is_capture, pipe);
mutex_lock(&chip->msg_lock);
lx_message_init(&chip->rmh, CMD_07_RELEASE_PIPE);
chip->rmh.cmd[0] |= pipe_cmd;
err = lx_message_send_atomic(chip, &chip->rmh);
mutex_unlock(&chip->msg_lock);
return err;
}
int lx_buffer_ask(struct lx6464es *chip, u32 pipe, int is_capture,
u32 *r_needed, u32 *r_freed, u32 *size_array)
{
int err;
u32 pipe_cmd = PIPE_INFO_TO_CMD(is_capture, pipe);
#ifdef CONFIG_SND_DEBUG
if (size_array)
memset(size_array, 0, sizeof(u32)*MAX_STREAM_BUFFER);
#endif
*r_needed = 0;
*r_freed = 0;
mutex_lock(&chip->msg_lock);
lx_message_init(&chip->rmh, CMD_08_ASK_BUFFERS);
chip->rmh.cmd[0] |= pipe_cmd;
err = lx_message_send_atomic(chip, &chip->rmh);
if (!err) {
int i;
for (i = 0; i < MAX_STREAM_BUFFER; ++i) {
u32 stat = chip->rmh.stat[i];
if (stat & (BF_EOB << BUFF_FLAGS_OFFSET)) {
/* finished */
*r_freed += 1;
if (size_array)
size_array[i] = stat & MASK_DATA_SIZE;
} else if ((stat & (BF_VALID << BUFF_FLAGS_OFFSET))
== 0)
/* free */
*r_needed += 1;
}
dev_dbg(chip->card->dev,
"CMD_08_ASK_BUFFERS: needed %d, freed %d\n",
*r_needed, *r_freed);
for (i = 0; i < MAX_STREAM_BUFFER; ++i) {
for (i = 0; i != chip->rmh.stat_len; ++i)
dev_dbg(chip->card->dev,
" stat[%d]: %x, %x\n", i,
chip->rmh.stat[i],
chip->rmh.stat[i] & MASK_DATA_SIZE);
}
}
mutex_unlock(&chip->msg_lock);
return err;
}
int lx_pipe_stop(struct lx6464es *chip, u32 pipe, int is_capture)
{
int err;
u32 pipe_cmd = PIPE_INFO_TO_CMD(is_capture, pipe);
mutex_lock(&chip->msg_lock);
lx_message_init(&chip->rmh, CMD_09_STOP_PIPE);
chip->rmh.cmd[0] |= pipe_cmd;
err = lx_message_send_atomic(chip, &chip->rmh);
mutex_unlock(&chip->msg_lock);
return err;
}
static int lx_pipe_toggle_state(struct lx6464es *chip, u32 pipe, int is_capture)
{
int err;
u32 pipe_cmd = PIPE_INFO_TO_CMD(is_capture, pipe);
mutex_lock(&chip->msg_lock);
lx_message_init(&chip->rmh, CMD_0B_TOGGLE_PIPE_STATE);
chip->rmh.cmd[0] |= pipe_cmd;
err = lx_message_send_atomic(chip, &chip->rmh);
mutex_unlock(&chip->msg_lock);
return err;
}
int lx_pipe_start(struct lx6464es *chip, u32 pipe, int is_capture)
{
int err;
err = lx_pipe_wait_for_idle(chip, pipe, is_capture);
if (err < 0)
return err;
err = lx_pipe_toggle_state(chip, pipe, is_capture);
return err;
}
int lx_pipe_pause(struct lx6464es *chip, u32 pipe, int is_capture)
{
int err = 0;
err = lx_pipe_wait_for_start(chip, pipe, is_capture);
if (err < 0)
return err;
err = lx_pipe_toggle_state(chip, pipe, is_capture);
return err;
}
int lx_pipe_sample_count(struct lx6464es *chip, u32 pipe, int is_capture,
u64 *rsample_count)
{
int err;
u32 pipe_cmd = PIPE_INFO_TO_CMD(is_capture, pipe);
mutex_lock(&chip->msg_lock);
lx_message_init(&chip->rmh, CMD_0A_GET_PIPE_SPL_COUNT);
chip->rmh.cmd[0] |= pipe_cmd;
chip->rmh.stat_len = 2; /* need all words here! */
err = lx_message_send_atomic(chip, &chip->rmh); /* don't sleep! */
if (err != 0)
dev_err(chip->card->dev,
"could not query pipe's sample count\n");
else {
*rsample_count = ((u64)(chip->rmh.stat[0] & MASK_SPL_COUNT_HI)
<< 24) /* hi part */
+ chip->rmh.stat[1]; /* lo part */
}
mutex_unlock(&chip->msg_lock);
return err;
}
int lx_pipe_state(struct lx6464es *chip, u32 pipe, int is_capture, u16 *rstate)
{
int err;
u32 pipe_cmd = PIPE_INFO_TO_CMD(is_capture, pipe);
mutex_lock(&chip->msg_lock);
lx_message_init(&chip->rmh, CMD_0A_GET_PIPE_SPL_COUNT);
chip->rmh.cmd[0] |= pipe_cmd;
err = lx_message_send_atomic(chip, &chip->rmh);
if (err != 0)
dev_err(chip->card->dev, "could not query pipe's state\n");
else
*rstate = (chip->rmh.stat[0] >> PSTATE_OFFSET) & 0x0F;
mutex_unlock(&chip->msg_lock);
return err;
}
static int lx_pipe_wait_for_state(struct lx6464es *chip, u32 pipe,
int is_capture, u16 state)
{
int i;
/* max 2*PCMOnlyGranularity = 2*1024 at 44100 = < 50 ms:
* timeout 50 ms */
for (i = 0; i != 50; ++i) {
u16 current_state;
int err = lx_pipe_state(chip, pipe, is_capture, &current_state);
if (err < 0)
return err;
if (!err && current_state == state)
return 0;
mdelay(1);
}
return -ETIMEDOUT;
}
int lx_pipe_wait_for_start(struct lx6464es *chip, u32 pipe, int is_capture)
{
return lx_pipe_wait_for_state(chip, pipe, is_capture, PSTATE_RUN);
}
int lx_pipe_wait_for_idle(struct lx6464es *chip, u32 pipe, int is_capture)
{
return lx_pipe_wait_for_state(chip, pipe, is_capture, PSTATE_IDLE);
}
/* low-level stream handling */
int lx_stream_set_state(struct lx6464es *chip, u32 pipe,
int is_capture, enum stream_state_t state)
{
int err;
u32 pipe_cmd = PIPE_INFO_TO_CMD(is_capture, pipe);
mutex_lock(&chip->msg_lock);
lx_message_init(&chip->rmh, CMD_13_SET_STREAM_STATE);
chip->rmh.cmd[0] |= pipe_cmd;
chip->rmh.cmd[0] |= state;
err = lx_message_send_atomic(chip, &chip->rmh);
mutex_unlock(&chip->msg_lock);
return err;
}
int lx_stream_set_format(struct lx6464es *chip, struct snd_pcm_runtime *runtime,
u32 pipe, int is_capture)
{
int err;
u32 pipe_cmd = PIPE_INFO_TO_CMD(is_capture, pipe);
u32 channels = runtime->channels;
if (runtime->channels != channels)
dev_err(chip->card->dev, "channel count mismatch: %d vs %d",
runtime->channels, channels);
mutex_lock(&chip->msg_lock);
lx_message_init(&chip->rmh, CMD_0C_DEF_STREAM);
chip->rmh.cmd[0] |= pipe_cmd;
if (runtime->sample_bits == 16)
/* 16 bit format */
chip->rmh.cmd[0] |= (STREAM_FMT_16b << STREAM_FMT_OFFSET);
if (snd_pcm_format_little_endian(runtime->format))
/* little endian/intel format */
chip->rmh.cmd[0] |= (STREAM_FMT_intel << STREAM_FMT_OFFSET);
chip->rmh.cmd[0] |= channels-1;
err = lx_message_send_atomic(chip, &chip->rmh);
mutex_unlock(&chip->msg_lock);
return err;
}
int lx_stream_state(struct lx6464es *chip, u32 pipe, int is_capture,
int *rstate)
{
int err;
u32 pipe_cmd = PIPE_INFO_TO_CMD(is_capture, pipe);
mutex_lock(&chip->msg_lock);
lx_message_init(&chip->rmh, CMD_0E_GET_STREAM_SPL_COUNT);
chip->rmh.cmd[0] |= pipe_cmd;
err = lx_message_send_atomic(chip, &chip->rmh);
*rstate = (chip->rmh.stat[0] & SF_START) ? START_STATE : PAUSE_STATE;
mutex_unlock(&chip->msg_lock);
return err;
}
int lx_stream_sample_position(struct lx6464es *chip, u32 pipe, int is_capture,
u64 *r_bytepos)
{
int err;
u32 pipe_cmd = PIPE_INFO_TO_CMD(is_capture, pipe);
mutex_lock(&chip->msg_lock);
lx_message_init(&chip->rmh, CMD_0E_GET_STREAM_SPL_COUNT);
chip->rmh.cmd[0] |= pipe_cmd;
err = lx_message_send_atomic(chip, &chip->rmh);
*r_bytepos = ((u64) (chip->rmh.stat[0] & MASK_SPL_COUNT_HI)
<< 32) /* hi part */
+ chip->rmh.stat[1]; /* lo part */
mutex_unlock(&chip->msg_lock);
return err;
}
/* low-level buffer handling */
int lx_buffer_give(struct lx6464es *chip, u32 pipe, int is_capture,
u32 buffer_size, u32 buf_address_lo, u32 buf_address_hi,
u32 *r_buffer_index)
{
int err;
u32 pipe_cmd = PIPE_INFO_TO_CMD(is_capture, pipe);
mutex_lock(&chip->msg_lock);
lx_message_init(&chip->rmh, CMD_0F_UPDATE_BUFFER);
chip->rmh.cmd[0] |= pipe_cmd;
chip->rmh.cmd[0] |= BF_NOTIFY_EOB; /* request interrupt notification */
/* todo: pause request, circular buffer */
chip->rmh.cmd[1] = buffer_size & MASK_DATA_SIZE;
chip->rmh.cmd[2] = buf_address_lo;
if (buf_address_hi) {
chip->rmh.cmd_len = 4;
chip->rmh.cmd[3] = buf_address_hi;
chip->rmh.cmd[0] |= BF_64BITS_ADR;
}
err = lx_message_send_atomic(chip, &chip->rmh);
if (err == 0) {
*r_buffer_index = chip->rmh.stat[0];
goto done;
}
if (err == EB_RBUFFERS_TABLE_OVERFLOW)
dev_err(chip->card->dev,
"lx_buffer_give EB_RBUFFERS_TABLE_OVERFLOW\n");
if (err == EB_INVALID_STREAM)
dev_err(chip->card->dev,
"lx_buffer_give EB_INVALID_STREAM\n");
if (err == EB_CMD_REFUSED)
dev_err(chip->card->dev,
"lx_buffer_give EB_CMD_REFUSED\n");
done:
mutex_unlock(&chip->msg_lock);
return err;
}
int lx_buffer_free(struct lx6464es *chip, u32 pipe, int is_capture,
u32 *r_buffer_size)
{
int err;
u32 pipe_cmd = PIPE_INFO_TO_CMD(is_capture, pipe);
mutex_lock(&chip->msg_lock);
lx_message_init(&chip->rmh, CMD_11_CANCEL_BUFFER);
chip->rmh.cmd[0] |= pipe_cmd;
chip->rmh.cmd[0] |= MASK_BUFFER_ID; /* ask for the current buffer: the
* microblaze will seek for it */
err = lx_message_send_atomic(chip, &chip->rmh);
if (err == 0)
*r_buffer_size = chip->rmh.stat[0] & MASK_DATA_SIZE;
mutex_unlock(&chip->msg_lock);
return err;
}
int lx_buffer_cancel(struct lx6464es *chip, u32 pipe, int is_capture,
u32 buffer_index)
{
int err;
u32 pipe_cmd = PIPE_INFO_TO_CMD(is_capture, pipe);
mutex_lock(&chip->msg_lock);
lx_message_init(&chip->rmh, CMD_11_CANCEL_BUFFER);
chip->rmh.cmd[0] |= pipe_cmd;
chip->rmh.cmd[0] |= buffer_index;
err = lx_message_send_atomic(chip, &chip->rmh);
mutex_unlock(&chip->msg_lock);
return err;
}
/* low-level gain/peak handling
*
* \todo: can we unmute capture/playback channels independently?
*
* */
int lx_level_unmute(struct lx6464es *chip, int is_capture, int unmute)
{
int err;
/* bit set to 1: channel muted */
u64 mute_mask = unmute ? 0 : 0xFFFFFFFFFFFFFFFFLLU;
mutex_lock(&chip->msg_lock);
lx_message_init(&chip->rmh, CMD_0D_SET_MUTE);
chip->rmh.cmd[0] |= PIPE_INFO_TO_CMD(is_capture, 0);
chip->rmh.cmd[1] = (u32)(mute_mask >> (u64)32); /* hi part */
chip->rmh.cmd[2] = (u32)(mute_mask & (u64)0xFFFFFFFF); /* lo part */
dev_dbg(chip->card->dev,
"mute %x %x %x\n", chip->rmh.cmd[0], chip->rmh.cmd[1],
chip->rmh.cmd[2]);
err = lx_message_send_atomic(chip, &chip->rmh);
mutex_unlock(&chip->msg_lock);
return err;
}
static u32 peak_map[] = {
0x00000109, /* -90.308dB */
0x0000083B, /* -72.247dB */
0x000020C4, /* -60.205dB */
0x00008273, /* -48.030dB */
0x00020756, /* -36.005dB */
0x00040C37, /* -30.001dB */
0x00081385, /* -24.002dB */
0x00101D3F, /* -18.000dB */
0x0016C310, /* -15.000dB */
0x002026F2, /* -12.001dB */
0x002D6A86, /* -9.000dB */
0x004026E6, /* -6.004dB */
0x005A9DF6, /* -3.000dB */
0x0065AC8B, /* -2.000dB */
0x00721481, /* -1.000dB */
0x007FFFFF, /* FS */
};
int lx_level_peaks(struct lx6464es *chip, int is_capture, int channels,
u32 *r_levels)
{
int err = 0;
int i;
mutex_lock(&chip->msg_lock);
for (i = 0; i < channels; i += 4) {
u32 s0, s1, s2, s3;
lx_message_init(&chip->rmh, CMD_12_GET_PEAK);
chip->rmh.cmd[0] |= PIPE_INFO_TO_CMD(is_capture, i);
err = lx_message_send_atomic(chip, &chip->rmh);
if (err == 0) {
s0 = peak_map[chip->rmh.stat[0] & 0x0F];
s1 = peak_map[(chip->rmh.stat[0] >> 4) & 0xf];
s2 = peak_map[(chip->rmh.stat[0] >> 8) & 0xf];
s3 = peak_map[(chip->rmh.stat[0] >> 12) & 0xf];
} else
s0 = s1 = s2 = s3 = 0;
r_levels[0] = s0;
r_levels[1] = s1;
r_levels[2] = s2;
r_levels[3] = s3;
r_levels += 4;
}
mutex_unlock(&chip->msg_lock);
return err;
}
/* interrupt handling */
#define PCX_IRQ_NONE 0
#define IRQCS_ACTIVE_PCIDB BIT(13)
#define IRQCS_ENABLE_PCIIRQ BIT(8)
#define IRQCS_ENABLE_PCIDB BIT(9)
static u32 lx_interrupt_test_ack(struct lx6464es *chip)
{
u32 irqcs = lx_plx_reg_read(chip, ePLX_IRQCS);
/* Test if PCI Doorbell interrupt is active */
if (irqcs & IRQCS_ACTIVE_PCIDB) {
u32 temp;
irqcs = PCX_IRQ_NONE;
while ((temp = lx_plx_reg_read(chip, ePLX_L2PCIDB))) {
/* RAZ interrupt */
irqcs |= temp;
lx_plx_reg_write(chip, ePLX_L2PCIDB, temp);
}
return irqcs;
}
return PCX_IRQ_NONE;
}
static int lx_interrupt_ack(struct lx6464es *chip, u32 *r_irqsrc,
int *r_async_pending, int *r_async_escmd)
{
u32 irq_async;
u32 irqsrc = lx_interrupt_test_ack(chip);
if (irqsrc == PCX_IRQ_NONE)
return 0;
*r_irqsrc = irqsrc;
irq_async = irqsrc & MASK_SYS_ASYNC_EVENTS; /* + EtherSound response
* (set by xilinx) + EOB */
if (irq_async & MASK_SYS_STATUS_ESA) {
irq_async &= ~MASK_SYS_STATUS_ESA;
*r_async_escmd = 1;
}
if (irq_async) {
/* dev_dbg(chip->card->dev, "interrupt: async event pending\n"); */
*r_async_pending = 1;
}
return 1;
}
static int lx_interrupt_handle_async_events(struct lx6464es *chip, u32 irqsrc,
int *r_freq_changed,
u64 *r_notified_in_pipe_mask,
u64 *r_notified_out_pipe_mask)
{
int err;
u32 stat[9]; /* answer from CMD_04_GET_EVENT */
/* We can optimize this to not read dumb events.
* Answer words are in the following order:
* Stat[0] general status
* Stat[1] end of buffer OUT pF
* Stat[2] end of buffer OUT pf
* Stat[3] end of buffer IN pF
* Stat[4] end of buffer IN pf
* Stat[5] MSB underrun
* Stat[6] LSB underrun
* Stat[7] MSB overrun
* Stat[8] LSB overrun
* */
u64 orun_mask;
u64 urun_mask;
int eb_pending_out = (irqsrc & MASK_SYS_STATUS_EOBO) ? 1 : 0;
int eb_pending_in = (irqsrc & MASK_SYS_STATUS_EOBI) ? 1 : 0;
*r_freq_changed = (irqsrc & MASK_SYS_STATUS_FREQ) ? 1 : 0;
err = lx_dsp_read_async_events(chip, stat);
if (err < 0)
return err;
if (eb_pending_in) {
*r_notified_in_pipe_mask = ((u64)stat[3] << 32)
+ stat[4];
dev_dbg(chip->card->dev, "interrupt: EOBI pending %llx\n",
*r_notified_in_pipe_mask);
}
if (eb_pending_out) {
*r_notified_out_pipe_mask = ((u64)stat[1] << 32)
+ stat[2];
dev_dbg(chip->card->dev, "interrupt: EOBO pending %llx\n",
*r_notified_out_pipe_mask);
}
orun_mask = ((u64)stat[7] << 32) + stat[8];
urun_mask = ((u64)stat[5] << 32) + stat[6];
/* todo: handle xrun notification */
return err;
}
static int lx_interrupt_request_new_buffer(struct lx6464es *chip,
struct lx_stream *lx_stream)
{
struct snd_pcm_substream *substream = lx_stream->stream;
const unsigned int is_capture = lx_stream->is_capture;
int err;
const u32 channels = substream->runtime->channels;
const u32 bytes_per_frame = channels * 3;
const u32 period_size = substream->runtime->period_size;
const u32 period_bytes = period_size * bytes_per_frame;
const u32 pos = lx_stream->frame_pos;
const u32 next_pos = ((pos+1) == substream->runtime->periods) ?
0 : pos + 1;
dma_addr_t buf = substream->dma_buffer.addr + pos * period_bytes;
u32 buf_hi = 0;
u32 buf_lo = 0;
u32 buffer_index = 0;
u32 needed, freed;
u32 size_array[MAX_STREAM_BUFFER];
dev_dbg(chip->card->dev, "->lx_interrupt_request_new_buffer\n");
mutex_lock(&chip->lock);
err = lx_buffer_ask(chip, 0, is_capture, &needed, &freed, size_array);
dev_dbg(chip->card->dev,
"interrupt: needed %d, freed %d\n", needed, freed);
unpack_pointer(buf, &buf_lo, &buf_hi);
err = lx_buffer_give(chip, 0, is_capture, period_bytes, buf_lo, buf_hi,
&buffer_index);
dev_dbg(chip->card->dev,
"interrupt: gave buffer index %x on 0x%lx (%d bytes)\n",
buffer_index, (unsigned long)buf, period_bytes);
lx_stream->frame_pos = next_pos;
mutex_unlock(&chip->lock);
return err;
}
irqreturn_t lx_interrupt(int irq, void *dev_id)
{
struct lx6464es *chip = dev_id;
int async_pending, async_escmd;
u32 irqsrc;
bool wake_thread = false;
dev_dbg(chip->card->dev,
"**************************************************\n");
if (!lx_interrupt_ack(chip, &irqsrc, &async_pending, &async_escmd)) {
dev_dbg(chip->card->dev, "IRQ_NONE\n");
return IRQ_NONE; /* this device did not cause the interrupt */
}
if (irqsrc & MASK_SYS_STATUS_CMD_DONE)
return IRQ_HANDLED;
if (irqsrc & MASK_SYS_STATUS_EOBI)
dev_dbg(chip->card->dev, "interrupt: EOBI\n");
if (irqsrc & MASK_SYS_STATUS_EOBO)
dev_dbg(chip->card->dev, "interrupt: EOBO\n");
if (irqsrc & MASK_SYS_STATUS_URUN)
dev_dbg(chip->card->dev, "interrupt: URUN\n");
if (irqsrc & MASK_SYS_STATUS_ORUN)
dev_dbg(chip->card->dev, "interrupt: ORUN\n");
if (async_pending) {
wake_thread = true;
chip->irqsrc = irqsrc;
}
if (async_escmd) {
/* backdoor for ethersound commands
*
* for now, we do not need this
*
* */
dev_dbg(chip->card->dev, "interrupt requests escmd handling\n");
}
return wake_thread ? IRQ_WAKE_THREAD : IRQ_HANDLED;
}
irqreturn_t lx_threaded_irq(int irq, void *dev_id)
{
struct lx6464es *chip = dev_id;
u64 notified_in_pipe_mask = 0;
u64 notified_out_pipe_mask = 0;
int freq_changed;
int err;
/* handle async events */
err = lx_interrupt_handle_async_events(chip, chip->irqsrc,
&freq_changed,
&notified_in_pipe_mask,
&notified_out_pipe_mask);
if (err)
dev_err(chip->card->dev, "error handling async events\n");
if (notified_in_pipe_mask) {
struct lx_stream *lx_stream = &chip->capture_stream;
dev_dbg(chip->card->dev,
"requesting audio transfer for capture\n");
err = lx_interrupt_request_new_buffer(chip, lx_stream);
if (err < 0)
dev_err(chip->card->dev,
"cannot request new buffer for capture\n");
snd_pcm_period_elapsed(lx_stream->stream);
}
if (notified_out_pipe_mask) {
struct lx_stream *lx_stream = &chip->playback_stream;
dev_dbg(chip->card->dev,
"requesting audio transfer for playback\n");
err = lx_interrupt_request_new_buffer(chip, lx_stream);
if (err < 0)
dev_err(chip->card->dev,
"cannot request new buffer for playback\n");
snd_pcm_period_elapsed(lx_stream->stream);
}
return IRQ_HANDLED;
}
static void lx_irq_set(struct lx6464es *chip, int enable)
{
u32 reg = lx_plx_reg_read(chip, ePLX_IRQCS);
/* enable/disable interrupts
*
* Set the Doorbell and PCI interrupt enable bits
*
* */
if (enable)
reg |= (IRQCS_ENABLE_PCIIRQ | IRQCS_ENABLE_PCIDB);
else
reg &= ~(IRQCS_ENABLE_PCIIRQ | IRQCS_ENABLE_PCIDB);
lx_plx_reg_write(chip, ePLX_IRQCS, reg);
}
void lx_irq_enable(struct lx6464es *chip)
{
dev_dbg(chip->card->dev, "->lx_irq_enable\n");
lx_irq_set(chip, 1);
}
void lx_irq_disable(struct lx6464es *chip)
{
dev_dbg(chip->card->dev, "->lx_irq_disable\n");
lx_irq_set(chip, 0);
}
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