[PATCHv2 1/2] Xilinx ML403 AC97 Controller Reference device driver
Joachim Förster
mls.JOFT at gmx.de
Sun Aug 12 02:23:52 EST 2007
Hi Takashi, Grant, Stephen,
I tried to correct the issues you pointed out and below you'll find a
new version of my patch. Maybe important changes:
- I moved to sound/drivers, so there will be less problems as soon as
somebody confirms that it works on MicroBlaze, too.
- I removed the inline stuff from pcm-indirect2.h and split it into a .c
file and a .h file.
@Stephen: Wolfgang Reissnegger's changes don't exist in any
"(un)official" branches, so I thought I stay with XILINX_VIRTEX -
anyway, it's a very small change to make - so we might do this later. Or
did I overlook something?
From: Joachim Foerster <JOFT at gmx.de>
Add ALSA support for the opb_ac97_controller_ref_v1_00_a ip core found
in Xilinx' ML403 reference design.
Known issue: Currently this driver hits a WARN_ON_ONCE(1) statement in
kernel/irq/resend.c (line 70). According to Linus
(http://lkml.org/lkml/2007/8/5/5) this may be ignored, right? I haven't
had a look into this "problem" yet.
(Patch for Linus' master branch, date 2007/08/08)
This patchset _will_ be published on
http://www.esic-solutions.com/support.html soon (like the first version
of the driver (tar file), but this may take some time ...).
Signed-off-by: Joachim Foerster <JOFT at gmx.de>
---
sound/drivers/Kconfig | 12 +
sound/drivers/Makefile | 2 +
sound/drivers/ml403-ac97cr.c | 1353 +++++++++++++++++++++++++++++++++++++++++
sound/drivers/pcm-indirect2.c | 591 ++++++++++++++++++
sound/drivers/pcm-indirect2.h | 140 +++++
5 files changed, 2098 insertions(+), 0 deletions(-)
create mode 100644 sound/drivers/ml403-ac97cr.c
create mode 100644 sound/drivers/pcm-indirect2.c
create mode 100644 sound/drivers/pcm-indirect2.h
diff --git a/sound/drivers/Kconfig b/sound/drivers/Kconfig
index 83529b0..6716adf 100644
--- a/sound/drivers/Kconfig
+++ b/sound/drivers/Kconfig
@@ -120,4 +120,16 @@ config SND_PORTMAN2X4
To compile this driver as a module, choose M here: the module
will be called snd-portman2x4.
+config SND_ML403_AC97CR
+ tristate "Xilinx ML403 AC97 Controller Reference"
+ depends on SND && XILINX_VIRTEX
+ select SND_AC97_CODEC
+ help
+ Say Y here to include support for the
+ opb_ac97_controller_ref_v1_00_a ip core found in Xilinx' ML403
+ reference design.
+
+ To compile this driver as a module, choose M here: the module
+ will be called snd-ml403_ac97cr.
+
endmenu
diff --git a/sound/drivers/Makefile b/sound/drivers/Makefile
index 0411264..c5a9471 100644
--- a/sound/drivers/Makefile
+++ b/sound/drivers/Makefile
@@ -9,6 +9,7 @@ snd-mts64-objs := mts64.o
snd-portman2x4-objs := portman2x4.o
snd-serial-u16550-objs := serial-u16550.o
snd-virmidi-objs := virmidi.o
+snd-ml403-ac97cr-objs := ml403-ac97cr.o pcm-indirect2.o
# Toplevel Module Dependency
obj-$(CONFIG_SND_DUMMY) += snd-dummy.o
@@ -17,5 +18,6 @@ obj-$(CONFIG_SND_SERIAL_U16550) += snd-serial-u16550.o
obj-$(CONFIG_SND_MTPAV) += snd-mtpav.o
obj-$(CONFIG_SND_MTS64) += snd-mts64.o
obj-$(CONFIG_SND_PORTMAN2X4) += snd-portman2x4.o
+obj-$(CONFIG_SND_ML403_AC97CR) += snd-ml403-ac97cr.o
obj-$(CONFIG_SND) += opl3/ opl4/ mpu401/ vx/
diff --git a/sound/drivers/ml403-ac97cr.c b/sound/drivers/ml403-ac97cr.c
new file mode 100644
index 0000000..2222315
--- /dev/null
+++ b/sound/drivers/ml403-ac97cr.c
@@ -0,0 +1,1353 @@
+/*
+ * ALSA driver for Xilinx ML403 AC97 Controller Reference
+ * IP: opb_ac97_controller_ref_v1_00_a (EDK 8.1i)
+ * IP: opb_ac97_controller_ref_v1_00_a (EDK 9.1i)
+ *
+ * Copyright (c) by 2007 Joachim Foerster <JOFT at gmx.de>
+ *
+ * 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; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+/* Some notes / status of this driver:
+ *
+ * - Don't wonder about some strange implementations of things - especially the
+ * (heavy) shadowing of codec registers, with which I tried to reduce read
+ * accesses to a minimum, because after a variable amount of accesses, the AC97
+ * controller doesn't raise the register access finished bit anymore ...
+ *
+ * - Capture support works - basically, but after ~30s (with rates > ~20kHz)
+ * ALSA stops reading captured samples from the intermediate buffer and
+ * therefore a overrun happens - ATM I don't know what's wrong.
+ *
+ * - Playback support seems to be pretty stable - no issues here.
+ */
+
+#include <sound/driver.h>
+#include <linux/init.h>
+#include <linux/moduleparam.h>
+
+#include <linux/platform_device.h>
+
+#include <linux/ioport.h>
+#include <linux/io.h>
+#include <linux/interrupt.h>
+
+/* HZ */
+#include <linux/param.h>
+/* jiffies, time_*() */
+#include <linux/jiffies.h>
+/* schedule_timeout*() */
+#include <linux/sched.h>
+/* spin_lock*() */
+#include <linux/spinlock.h>
+/* struct mutex, mutex_init(), mutex_*lock() */
+#include <linux/mutex.h>
+
+/* snd_printk(), snd_printd() */
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/initval.h>
+#include <sound/ac97_codec.h>
+
+#include "pcm-indirect2.h"
+
+
+#define SND_ML403_AC97CR_DRIVER "ml403-ac97cr"
+
+MODULE_AUTHOR("Joachim Foerster <JOFT at gmx.de>");
+MODULE_DESCRIPTION("Xilinx ML403 AC97 Controller Reference");
+MODULE_LICENSE("GPL");
+MODULE_SUPPORTED_DEVICE("{{Xilinx,ML403 AC97 Controller Reference}}");
+
+static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
+static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
+static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE;
+
+module_param_array(index, int, NULL, 0444);
+MODULE_PARM_DESC(index, "Index value for ML403 AC97 Controller Reference.");
+module_param_array(id, charp, NULL, 0444);
+MODULE_PARM_DESC(id, "ID string for ML403 AC97 Controller Reference.");
+module_param_array(enable, bool, NULL, 0444);
+MODULE_PARM_DESC(enable, "Enable this ML403 AC97 Controller Reference.");
+
+/* Special feature options */
+/*#define CODEC_WRITE_CHECK_RAF*/ /* don't return after a write to a codec
+ * register, while RAF bit is not set
+ */
+/* Debug options for code which may be removed completely in a final version */
+#ifdef CONFIG_SND_DEBUG
+/*#define CODEC_STAT*/ /* turn on some minimal "statistics"
+ * about codec register usage
+ */
+#define SND_PCM_INDIRECT2_STAT /* turn on some "statistics" about the
+ * process of copying bytes from the
+ * intermediate buffer to the hardware
+ * fifo and the other way round
+ */
+#endif
+
+/* Definition of a "level/facility dependent" printk(); may be removed
+ * completely in a final version
+ */
+#undef PDEBUG
+#ifdef CONFIG_SND_DEBUG
+/* "facilities" for PDEBUG */
+#define UNKNOWN (1<<0)
+#define CODEC_SUCCESS (1<<1)
+#define CODEC_FAKE (1<<2)
+#define INIT_INFO (1<<3)
+#define INIT_FAILURE (1<<4)
+#define WORK_INFO (1<<5)
+#define WORK_FAILURE (1<<6)
+
+#define PDEBUG_FACILITIES (UNKNOWN | INIT_FAILURE | WORK_FAILURE)
+
+#define PDEBUG(fac, fmt, args...) do { \
+ if (fac & PDEBUG_FACILITIES) \
+ snd_printd(KERN_DEBUG SND_ML403_AC97CR_DRIVER ": " \
+ fmt, ##args); \
+ } while (0)
+#else
+#define PDEBUG(fac, fmt, args...) /* nothing */
+#endif
+
+
+
+/* Defines for "waits"/timeouts (portions of HZ=250 on arch/ppc by default) */
+#define CODEC_TIMEOUT_ON_INIT 5 /* timeout for checking for codec
+ * readiness (after insmod)
+ */
+#ifndef CODEC_WRITE_CHECK_RAF
+#define CODEC_WAIT_AFTER_WRITE 100 /* general, static wait after a write
+ * access to a codec register, may be
+ * 0 to completely remove wait
+ */
+#else
+#define CODEC_TIMEOUT_AFTER_WRITE 5 /* timeout after a write access to a
+ * codec register, if RAF bit is used
+ */
+#endif
+#define CODEC_TIMEOUT_AFTER_READ 5 /* timeout after a read access to a
+ * codec register (checking RAF bit)
+ */
+
+/* Infrastructure for codec register shadowing */
+#define LM4550_REG_OK (1<<0) /* register exists */
+#define LM4550_REG_DONEREAD (1<<1) /* read register once, value should be
+ * the same currently in the register
+ */
+#define LM4550_REG_NOSAVE (1<<2) /* values written to this register will
+ * not be saved in the register
+ */
+#define LM4550_REG_NOSHADOW (1<<3) /* don't do register shadowing, use plain
+ * hardware access
+ */
+#define LM4550_REG_READONLY (1<<4) /* register is read only */
+#define LM4550_REG_FAKEPROBE (1<<5) /* fake write _and_ read actions during
+ * probe() correctly
+ */
+#define LM4550_REG_FAKEREAD (1<<6) /* fake read access, always return
+ * default value
+ */
+#define LM4550_REG_ALLFAKE (LM4550_REG_FAKEREAD | LM4550_REG_FAKEPROBE)
+
+struct lm4550_reg {
+ u16 value;
+ u16 flag;
+ u16 wmask;
+ u16 def;
+};
+
+struct lm4550_reg lm4550_regfile[64] = {
+ [AC97_RESET / 2] = {.flag = LM4550_REG_OK \
+ | LM4550_REG_NOSAVE \
+ | LM4550_REG_FAKEREAD,
+ .def = 0x0D50},
+ [AC97_MASTER / 2] = {.flag = LM4550_REG_OK
+ | LM4550_REG_FAKEPROBE,
+ .wmask = 0x9F1F,
+ .def = 0x8000},
+ [AC97_HEADPHONE / 2] = {.flag = LM4550_REG_OK \
+ | LM4550_REG_FAKEPROBE,
+ .wmask = 0x9F1F,
+ .def = 0x8000},
+ [AC97_MASTER_MONO / 2] = {.flag = LM4550_REG_OK \
+ | LM4550_REG_FAKEPROBE,
+ .wmask = 0x801F,
+ .def = 0x8000},
+ [AC97_PC_BEEP / 2] = {.flag = LM4550_REG_OK \
+ | LM4550_REG_FAKEPROBE,
+ .wmask = 0x801E,
+ .def = 0x0},
+ [AC97_PHONE / 2] = {.flag = LM4550_REG_OK \
+ | LM4550_REG_FAKEPROBE,
+ .wmask = 0x801F,
+ .def = 0x8008},
+ [AC97_MIC / 2] = {.flag = LM4550_REG_OK \
+ | LM4550_REG_FAKEPROBE,
+ .wmask = 0x805F,
+ .def = 0x8008},
+ [AC97_LINE / 2] = {.flag = LM4550_REG_OK \
+ | LM4550_REG_FAKEPROBE,
+ .wmask = 0x9F1F,
+ .def = 0x8808},
+ [AC97_CD / 2] = {.flag = LM4550_REG_OK \
+ | LM4550_REG_FAKEPROBE,
+ .wmask = 0x9F1F,
+ .def = 0x8808},
+ [AC97_VIDEO / 2] = {.flag = LM4550_REG_OK \
+ | LM4550_REG_FAKEPROBE,
+ .wmask = 0x9F1F,
+ .def = 0x8808},
+ [AC97_AUX / 2] = {.flag = LM4550_REG_OK \
+ | LM4550_REG_FAKEPROBE,
+ .wmask = 0x9F1F,
+ .def = 0x8808},
+ [AC97_PCM / 2] = {.flag = LM4550_REG_OK \
+ | LM4550_REG_FAKEPROBE,
+ .wmask = 0x9F1F,
+ .def = 0x8008},
+ [AC97_REC_SEL / 2] = {.flag = LM4550_REG_OK \
+ | LM4550_REG_FAKEPROBE,
+ .wmask = 0x707,
+ .def = 0x0},
+ [AC97_REC_GAIN / 2] = {.flag = LM4550_REG_OK \
+ | LM4550_REG_FAKEPROBE,
+ .wmask = 0x8F0F,
+ .def = 0x8000},
+ [AC97_GENERAL_PURPOSE / 2] = {.flag = LM4550_REG_OK \
+ | LM4550_REG_FAKEPROBE,
+ .def = 0x0,
+ .wmask = 0xA380},
+ [AC97_3D_CONTROL / 2] = {.flag = LM4550_REG_OK \
+ | LM4550_REG_FAKEREAD \
+ | LM4550_REG_READONLY,
+ .def = 0x0101},
+ [AC97_POWERDOWN / 2] = {.flag = LM4550_REG_OK \
+ | LM4550_REG_NOSHADOW \
+ | LM4550_REG_NOSAVE,
+ .wmask = 0xFF00},
+ /* may not write ones to
+ * REF/ANL/DAC/ADC bits
+ * FIXME: Is this ok?
+ */
+ [AC97_EXTENDED_ID / 2] = {.flag = LM4550_REG_OK \
+ | LM4550_REG_FAKEREAD \
+ | LM4550_REG_READONLY,
+ .def = 0x0201}, /* primary codec */
+ [AC97_EXTENDED_STATUS / 2] = {.flag = LM4550_REG_OK \
+ | LM4550_REG_NOSHADOW \
+ | LM4550_REG_NOSAVE,
+ .wmask = 0x1},
+ [AC97_PCM_FRONT_DAC_RATE / 2] = {.flag = LM4550_REG_OK \
+ | LM4550_REG_FAKEPROBE,
+ .def = 0xBB80,
+ .wmask = 0xFFFF},
+ [AC97_PCM_LR_ADC_RATE / 2] = {.flag = LM4550_REG_OK \
+ | LM4550_REG_FAKEPROBE,
+ .def = 0xBB80,
+ .wmask = 0xFFFF},
+ [AC97_VENDOR_ID1 / 2] = {.flag = LM4550_REG_OK \
+ | LM4550_REG_READONLY \
+ | LM4550_REG_FAKEREAD,
+ .def = 0x4E53},
+ [AC97_VENDOR_ID2 / 2] = {.flag = LM4550_REG_OK \
+ | LM4550_REG_READONLY \
+ | LM4550_REG_FAKEREAD,
+ .def = 0x4350}
+};
+
+#define LM4550_RF_OK(reg) (lm4550_regfile[reg / 2].flag & LM4550_REG_OK)
+
+static void lm4550_regfile_init(void)
+{
+ int i;
+ for (i = 0; i < 64; i++)
+ if (lm4550_regfile[i].flag & LM4550_REG_FAKEPROBE)
+ lm4550_regfile[i].value = lm4550_regfile[i].def;
+}
+
+static void lm4550_regfile_write_values_after_init(struct snd_ac97 *ac97)
+{
+ int i;
+ for (i = 0; i < 64; i++)
+ if ((lm4550_regfile[i].flag & LM4550_REG_FAKEPROBE) &&
+ (lm4550_regfile[i].value != lm4550_regfile[i].def)) {
+ PDEBUG(CODEC_FAKE, "lm4550_regfile_write_values_after_"
+ "init(): reg=0x%x value=0x%x / %d is different "
+ "from def=0x%x / %d\n",
+ i, lm4550_regfile[i].value,
+ lm4550_regfile[i].value, lm4550_regfile[i].def,
+ lm4550_regfile[i].def);
+ snd_ac97_write(ac97, i * 2, lm4550_regfile[i].value);
+ lm4550_regfile[i].flag |= LM4550_REG_DONEREAD;
+ }
+}
+
+
+/* direct registers */
+#define CR_REG(ml403_ac97cr, x) ((ml403_ac97cr)->port + CR_REG_##x)
+
+#define CR_REG_PLAYFIFO 0x00
+#define CR_PLAYDATA(a) ((a) & 0xFFFF)
+
+#define CR_REG_RECFIFO 0x04
+#define CR_RECDATA(a) ((a) & 0xFFFF)
+
+#define CR_REG_STATUS 0x08
+#define CR_RECOVER (1<<7)
+#define CR_PLAYUNDER (1<<6)
+#define CR_CODECREADY (1<<5)
+#define CR_RAF (1<<4)
+#define CR_RECEMPTY (1<<3)
+#define CR_RECFULL (1<<2)
+#define CR_PLAYHALF (1<<1)
+#define CR_PLAYFULL (1<<0)
+
+#define CR_REG_RESETFIFO 0x0C
+#define CR_RECRESET (1<<1)
+#define CR_PLAYRESET (1<<0)
+
+#define CR_REG_CODEC_ADDR 0x10
+/* UG082 says:
+ * #define CR_CODEC_ADDR(a) ((a) << 1)
+ * #define CR_CODEC_READ (1<<0)
+ * #define CR_CODEC_WRITE (0<<0)
+ */
+/* RefDesign example says: */
+#define CR_CODEC_ADDR(a) ((a) << 0)
+#define CR_CODEC_READ (1<<7)
+#define CR_CODEC_WRITE (0<<7)
+
+#define CR_REG_CODEC_DATAREAD 0x14
+#define CR_CODEC_DATAREAD(v) ((v) & 0xFFFF)
+
+#define CR_REG_CODEC_DATAWRITE 0x18
+#define CR_CODEC_DATAWRITE(v) ((v) & 0xFFFF)
+
+#define CR_FIFO_SIZE 32
+
+struct snd_ml403_ac97cr {
+ /* lock for access to (controller) registers */
+ spinlock_t reg_lock;
+ /* mutex for the whole sequence of accesses to (controller) registers
+ * which affect codec registers
+ */
+ struct mutex cdc_mutex;
+
+ int irq; /* for playback */
+ int enable_irq; /* for playback */
+
+ int capture_irq;
+ int enable_capture_irq;
+
+ struct resource *res_port;
+ void *port;
+
+ struct snd_ac97 *ac97;
+ int ac97_fake;
+#ifdef CODEC_STAT
+ int ac97_read;
+ int ac97_write;
+#endif
+
+ struct platform_device *pfdev;
+ struct snd_card *card;
+ struct snd_pcm *pcm;
+ struct snd_pcm_substream *playback_substream;
+ struct snd_pcm_substream *capture_substream;
+
+ struct snd_pcm_indirect2 ind_rec; /* for playback */
+ struct snd_pcm_indirect2 capture_ind2_rec;
+};
+
+static struct snd_pcm_hardware snd_ml403_ac97cr_playback = {
+ .info = (SNDRV_PCM_INFO_MMAP |
+ SNDRV_PCM_INFO_INTERLEAVED |
+ SNDRV_PCM_INFO_MMAP_VALID),
+ .formats = SNDRV_PCM_FMTBIT_S16_BE,
+ .rates = (SNDRV_PCM_RATE_CONTINUOUS |
+ SNDRV_PCM_RATE_8000_48000),
+ .rate_min = 4000,
+ .rate_max = 48000,
+ .channels_min = 2,
+ .channels_max = 2,
+ .buffer_bytes_max = (128*1024),
+ .period_bytes_min = CR_FIFO_SIZE/2,
+ .period_bytes_max = (64*1024),
+ .periods_min = 2,
+ .periods_max = (128*1024)/(CR_FIFO_SIZE/2),
+ .fifo_size = 0,
+};
+
+static struct snd_pcm_hardware snd_ml403_ac97cr_capture = {
+ .info = (SNDRV_PCM_INFO_MMAP |
+ SNDRV_PCM_INFO_INTERLEAVED |
+ SNDRV_PCM_INFO_MMAP_VALID),
+ .formats = SNDRV_PCM_FMTBIT_S16_BE,
+ .rates = (SNDRV_PCM_RATE_CONTINUOUS |
+ SNDRV_PCM_RATE_8000_48000),
+ .rate_min = 4000,
+ .rate_max = 48000,
+ .channels_min = 2,
+ .channels_max = 2,
+ .buffer_bytes_max = (128*1024),
+ .period_bytes_min = CR_FIFO_SIZE/2,
+ .period_bytes_max = (64*1024),
+ .periods_min = 2,
+ .periods_max = (128*1024)/(CR_FIFO_SIZE/2),
+ .fifo_size = 0,
+};
+
+static size_t
+snd_ml403_ac97cr_playback_ind2_zero(struct snd_pcm_substream *substream,
+ struct snd_pcm_indirect2 *rec)
+{
+ struct snd_ml403_ac97cr *ml403_ac97cr;
+ int copied_words = 0;
+ u32 full = 0;
+
+ ml403_ac97cr = snd_pcm_substream_chip(substream);
+
+ spin_lock(&ml403_ac97cr->reg_lock);
+ while ((full = (in_be32(CR_REG(ml403_ac97cr, STATUS)) &
+ CR_PLAYFULL)) != CR_PLAYFULL) {
+ out_be32(CR_REG(ml403_ac97cr, PLAYFIFO), 0);
+ copied_words++;
+ }
+ rec->hw_ready = 0;
+ spin_unlock(&ml403_ac97cr->reg_lock);
+
+ return (size_t) (copied_words * 2);
+}
+
+static size_t
+snd_ml403_ac97cr_playback_ind2_copy(struct snd_pcm_substream *substream,
+ struct snd_pcm_indirect2 *rec,
+ size_t bytes)
+{
+ struct snd_ml403_ac97cr *ml403_ac97cr;
+ u16 *src;
+ int copied_words = 0;
+ u32 full = 0;
+
+ ml403_ac97cr = snd_pcm_substream_chip(substream);
+ src = (u16 *)(substream->runtime->dma_area + rec->sw_data);
+
+ spin_lock(&ml403_ac97cr->reg_lock);
+ while (((full = (in_be32(CR_REG(ml403_ac97cr, STATUS)) &
+ CR_PLAYFULL)) != CR_PLAYFULL) && (bytes > 1)) {
+ out_be32(CR_REG(ml403_ac97cr, PLAYFIFO),
+ CR_PLAYDATA(src[copied_words]));
+ copied_words++;
+ bytes = bytes - 2;
+ }
+ if (full != CR_PLAYFULL)
+ rec->hw_ready = 1;
+ else
+ rec->hw_ready = 0;
+ spin_unlock(&ml403_ac97cr->reg_lock);
+
+ return (size_t) (copied_words * 2);
+}
+
+static size_t
+snd_ml403_ac97cr_capture_ind2_null(struct snd_pcm_substream *substream,
+ struct snd_pcm_indirect2 *rec)
+{
+ struct snd_ml403_ac97cr *ml403_ac97cr;
+ int copied_words = 0;
+ u32 empty = 0;
+
+ ml403_ac97cr = snd_pcm_substream_chip(substream);
+
+ spin_lock(&ml403_ac97cr->reg_lock);
+ while ((empty = (in_be32(CR_REG(ml403_ac97cr, STATUS)) &
+ CR_RECEMPTY)) != CR_RECEMPTY) {
+ volatile u32 trash;
+
+ trash = CR_RECDATA(in_be32(CR_REG(ml403_ac97cr, RECFIFO)));
+ /* Hmmmm, really necessary? Don't want call to in_be32()
+ * to be optimised away!
+ */
+ trash++;
+ copied_words++;
+ }
+ rec->hw_ready = 0;
+ spin_unlock(&ml403_ac97cr->reg_lock);
+
+ return (size_t) (copied_words * 2);
+}
+
+static size_t
+snd_ml403_ac97cr_capture_ind2_copy(struct snd_pcm_substream *substream,
+ struct snd_pcm_indirect2 *rec, size_t bytes)
+{
+ struct snd_ml403_ac97cr *ml403_ac97cr;
+ u16 *dst;
+ int copied_words = 0;
+ u32 empty = 0;
+
+ ml403_ac97cr = snd_pcm_substream_chip(substream);
+ dst = (u16 *)(substream->runtime->dma_area + rec->sw_data);
+
+ spin_lock(&ml403_ac97cr->reg_lock);
+ while (((empty = (in_be32(CR_REG(ml403_ac97cr, STATUS)) &
+ CR_RECEMPTY)) != CR_RECEMPTY) && (bytes > 1)) {
+ dst[copied_words] = CR_RECDATA(in_be32(CR_REG(ml403_ac97cr,
+ RECFIFO)));
+ copied_words++;
+ bytes = bytes - 2;
+ }
+ if (empty != CR_RECEMPTY)
+ rec->hw_ready = 1;
+ else
+ rec->hw_ready = 0;
+ spin_unlock(&ml403_ac97cr->reg_lock);
+
+ return (size_t) (copied_words * 2);
+}
+
+static snd_pcm_uframes_t
+snd_ml403_ac97cr_pcm_pointer(struct snd_pcm_substream *substream)
+{
+ struct snd_ml403_ac97cr *ml403_ac97cr;
+ struct snd_pcm_indirect2 *ind2_rec = NULL;
+
+ ml403_ac97cr = snd_pcm_substream_chip(substream);
+
+ if (substream == ml403_ac97cr->playback_substream)
+ ind2_rec = &ml403_ac97cr->ind_rec;
+ if (substream == ml403_ac97cr->capture_substream)
+ ind2_rec = &ml403_ac97cr->capture_ind2_rec;
+
+ if (ind2_rec != NULL)
+ return snd_pcm_indirect2_pointer(substream, ind2_rec);
+ return (snd_pcm_uframes_t) 0;
+}
+
+static int
+snd_ml403_ac97cr_pcm_playback_trigger(struct snd_pcm_substream *substream,
+ int cmd)
+{
+ struct snd_ml403_ac97cr *ml403_ac97cr;
+ int err = 0;
+
+ ml403_ac97cr = snd_pcm_substream_chip(substream);
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ PDEBUG(WORK_INFO, "trigger(playback): START\n");
+ ml403_ac97cr->ind_rec.hw_ready = 1;
+
+ /* clear play FIFO */
+ out_be32(CR_REG(ml403_ac97cr, RESETFIFO), CR_PLAYRESET);
+
+ /* enable play irq */
+ ml403_ac97cr->enable_irq = 1;
+ enable_irq(ml403_ac97cr->irq);
+ break;
+ case SNDRV_PCM_TRIGGER_STOP:
+ PDEBUG(WORK_INFO, "trigger(playback): STOP\n");
+ ml403_ac97cr->ind_rec.hw_ready = 0;
+#ifdef SND_PCM_INDIRECT2_STAT
+ snd_pcm_indirect2_stat(substream, &ml403_ac97cr->ind_rec);
+#endif
+ /* disable play irq */
+ disable_irq_nosync(ml403_ac97cr->irq);
+ ml403_ac97cr->enable_irq = 0;
+ break;
+ default:
+ err = -EINVAL;
+ break;
+ }
+ PDEBUG(WORK_INFO, "trigger(playback): (done)\n");
+ return err;
+}
+
+static int
+snd_ml403_ac97cr_pcm_capture_trigger(struct snd_pcm_substream *substream,
+ int cmd)
+{
+ struct snd_ml403_ac97cr *ml403_ac97cr;
+ int err = 0;
+
+ ml403_ac97cr = snd_pcm_substream_chip(substream);
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ PDEBUG(WORK_INFO, "trigger(capture): START\n");
+ ml403_ac97cr->capture_ind2_rec.hw_ready = 0;
+
+ /* clear record FIFO */
+ out_be32(CR_REG(ml403_ac97cr, RESETFIFO), CR_RECRESET);
+
+ /* enable record irq */
+ ml403_ac97cr->enable_capture_irq = 1;
+ enable_irq(ml403_ac97cr->capture_irq);
+ break;
+ case SNDRV_PCM_TRIGGER_STOP:
+ PDEBUG(WORK_INFO, "trigger(capture): STOP\n");
+ ml403_ac97cr->capture_ind2_rec.hw_ready = 0;
+#ifdef SND_PCM_INDIRECT2_STAT
+ snd_pcm_indirect2_stat(substream,
+ &ml403_ac97cr->capture_ind2_rec);
+#endif
+ /* disable capture irq */
+ disable_irq_nosync(ml403_ac97cr->capture_irq);
+ ml403_ac97cr->enable_capture_irq = 0;
+ break;
+ default:
+ err = -EINVAL;
+ break;
+ }
+ PDEBUG(WORK_INFO, "trigger(capture): (done)\n");
+ return err;
+}
+
+static int
+snd_ml403_ac97cr_pcm_playback_prepare(struct snd_pcm_substream *substream)
+{
+ struct snd_ml403_ac97cr *ml403_ac97cr;
+ struct snd_pcm_runtime *runtime;
+
+ ml403_ac97cr = snd_pcm_substream_chip(substream);
+ runtime = substream->runtime;
+
+ PDEBUG(WORK_INFO,
+ "prepare(): period_bytes=%d, minperiod_bytes=%d\n",
+ snd_pcm_lib_period_bytes(substream), CR_FIFO_SIZE / 2);
+
+ /* set sampling rate */
+ snd_ac97_set_rate(ml403_ac97cr->ac97, AC97_PCM_FRONT_DAC_RATE,
+ runtime->rate);
+ PDEBUG(WORK_INFO, "prepare(): rate=%d\n", runtime->rate);
+
+ /* init struct for intermediate buffer */
+ memset(&ml403_ac97cr->ind_rec, 0,
+ sizeof(struct snd_pcm_indirect2));
+ ml403_ac97cr->ind_rec.hw_buffer_size = CR_FIFO_SIZE;
+ ml403_ac97cr->ind_rec.sw_buffer_size =
+ snd_pcm_lib_buffer_bytes(substream);
+ ml403_ac97cr->ind_rec.min_periods = -1;
+ ml403_ac97cr->ind_rec.min_multiple =
+ snd_pcm_lib_period_bytes(substream) / (CR_FIFO_SIZE / 2);
+ PDEBUG(WORK_INFO, "prepare(): hw_buffer_size=%d, "
+ "sw_buffer_size=%d, min_multiple=%d\n",
+ CR_FIFO_SIZE, ml403_ac97cr->ind_rec.sw_buffer_size,
+ ml403_ac97cr->ind_rec.min_multiple);
+ return 0;
+}
+
+static int
+snd_ml403_ac97cr_pcm_capture_prepare(struct snd_pcm_substream *substream)
+{
+ struct snd_ml403_ac97cr *ml403_ac97cr;
+ struct snd_pcm_runtime *runtime;
+
+ ml403_ac97cr = snd_pcm_substream_chip(substream);
+ runtime = substream->runtime;
+
+ PDEBUG(WORK_INFO,
+ "prepare(capture): period_bytes=%d, minperiod_bytes=%d\n",
+ snd_pcm_lib_period_bytes(substream), CR_FIFO_SIZE / 2);
+
+ /* set sampling rate */
+ snd_ac97_set_rate(ml403_ac97cr->ac97, AC97_PCM_LR_ADC_RATE,
+ runtime->rate);
+ PDEBUG(WORK_INFO, "prepare(capture): rate=%d\n", runtime->rate);
+
+ /* init struct for intermediate buffer */
+ memset(&ml403_ac97cr->capture_ind2_rec, 0,
+ sizeof(struct snd_pcm_indirect2));
+ ml403_ac97cr->capture_ind2_rec.hw_buffer_size = CR_FIFO_SIZE;
+ ml403_ac97cr->capture_ind2_rec.sw_buffer_size =
+ snd_pcm_lib_buffer_bytes(substream);
+ ml403_ac97cr->capture_ind2_rec.min_multiple =
+ snd_pcm_lib_period_bytes(substream) / (CR_FIFO_SIZE / 2);
+ PDEBUG(WORK_INFO, "prepare(capture): hw_buffer_size=%d, "
+ "sw_buffer_size=%d, min_multiple=%d\n", CR_FIFO_SIZE,
+ ml403_ac97cr->capture_ind2_rec.sw_buffer_size,
+ ml403_ac97cr->capture_ind2_rec.min_multiple);
+ return 0;
+}
+
+static int snd_ml403_ac97cr_hw_free(struct snd_pcm_substream *substream)
+{
+ PDEBUG(WORK_INFO, "hw_free()\n");
+ return snd_pcm_lib_free_pages(substream);
+}
+
+static int
+snd_ml403_ac97cr_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *hw_params)
+{
+ PDEBUG(WORK_INFO, "hw_params(): desired buffer bytes=%d, desired "
+ "period bytes=%d\n",
+ params_buffer_bytes(hw_params), params_period_bytes(hw_params));
+ return snd_pcm_lib_malloc_pages(substream,
+ params_buffer_bytes(hw_params));
+}
+
+static int snd_ml403_ac97cr_playback_open(struct snd_pcm_substream *substream)
+{
+ struct snd_ml403_ac97cr *ml403_ac97cr;
+ struct snd_pcm_runtime *runtime;
+
+ ml403_ac97cr = snd_pcm_substream_chip(substream);
+ runtime = substream->runtime;
+
+ PDEBUG(WORK_INFO, "open(playback)\n");
+ ml403_ac97cr->playback_substream = substream;
+ runtime->hw = snd_ml403_ac97cr_playback;
+
+ snd_pcm_hw_constraint_step(runtime, 0,
+ SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
+ CR_FIFO_SIZE / 2);
+ return 0;
+}
+
+static int snd_ml403_ac97cr_capture_open(struct snd_pcm_substream *substream)
+{
+ struct snd_ml403_ac97cr *ml403_ac97cr;
+ struct snd_pcm_runtime *runtime;
+
+ ml403_ac97cr = snd_pcm_substream_chip(substream);
+ runtime = substream->runtime;
+
+ PDEBUG(WORK_INFO, "open(capture)\n");
+ ml403_ac97cr->capture_substream = substream;
+ runtime->hw = snd_ml403_ac97cr_capture;
+
+ snd_pcm_hw_constraint_step(runtime, 0,
+ SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
+ CR_FIFO_SIZE / 2);
+ return 0;
+}
+
+static int snd_ml403_ac97cr_playback_close(struct snd_pcm_substream *substream)
+{
+ struct snd_ml403_ac97cr *ml403_ac97cr;
+
+ ml403_ac97cr = snd_pcm_substream_chip(substream);
+
+ PDEBUG(WORK_INFO, "close(playback)\n");
+ ml403_ac97cr->playback_substream = NULL;
+ return 0;
+}
+
+static int snd_ml403_ac97cr_capture_close(struct snd_pcm_substream *substream)
+{
+ struct snd_ml403_ac97cr *ml403_ac97cr;
+
+ ml403_ac97cr = snd_pcm_substream_chip(substream);
+
+ PDEBUG(WORK_INFO, "close(capture)\n");
+ ml403_ac97cr->capture_substream = NULL;
+ return 0;
+}
+
+static struct snd_pcm_ops snd_ml403_ac97cr_playback_ops = {
+ .open = snd_ml403_ac97cr_playback_open,
+ .close = snd_ml403_ac97cr_playback_close,
+ .ioctl = snd_pcm_lib_ioctl,
+ .hw_params = snd_ml403_ac97cr_hw_params,
+ .hw_free = snd_ml403_ac97cr_hw_free,
+ .prepare = snd_ml403_ac97cr_pcm_playback_prepare,
+ .trigger = snd_ml403_ac97cr_pcm_playback_trigger,
+ .pointer = snd_ml403_ac97cr_pcm_pointer,
+};
+
+static struct snd_pcm_ops snd_ml403_ac97cr_capture_ops = {
+ .open = snd_ml403_ac97cr_capture_open,
+ .close = snd_ml403_ac97cr_capture_close,
+ .ioctl = snd_pcm_lib_ioctl,
+ .hw_params = snd_ml403_ac97cr_hw_params,
+ .hw_free = snd_ml403_ac97cr_hw_free,
+ .prepare = snd_ml403_ac97cr_pcm_capture_prepare,
+ .trigger = snd_ml403_ac97cr_pcm_capture_trigger,
+ .pointer = snd_ml403_ac97cr_pcm_pointer,
+};
+
+static irqreturn_t snd_ml403_ac97cr_irq(int irq, void *dev_id)
+{
+ struct snd_ml403_ac97cr *ml403_ac97cr;
+ struct platform_device *pfdev;
+ int cmp_irq;
+
+ ml403_ac97cr = (struct snd_ml403_ac97cr *)dev_id;
+ if (ml403_ac97cr == NULL)
+ return IRQ_NONE;
+
+ pfdev = ml403_ac97cr->pfdev;
+
+ /* playback interrupt */
+ cmp_irq = platform_get_irq(pfdev, 0);
+ if (irq == cmp_irq) {
+ if (ml403_ac97cr->enable_irq)
+ snd_pcm_indirect2_playback_interrupt(
+ ml403_ac97cr->playback_substream,
+ &ml403_ac97cr->ind_rec,
+ snd_ml403_ac97cr_playback_ind2_copy,
+ snd_ml403_ac97cr_playback_ind2_zero);
+ else
+ goto __disable_irq;
+ } else {
+ /* record interrupt */
+ cmp_irq = platform_get_irq(pfdev, 1);
+ if (irq == cmp_irq) {
+ if (ml403_ac97cr->enable_capture_irq)
+ snd_pcm_indirect2_capture_interrupt(
+ ml403_ac97cr->capture_substream,
+ &ml403_ac97cr->capture_ind2_rec,
+ snd_ml403_ac97cr_capture_ind2_copy,
+ snd_ml403_ac97cr_capture_ind2_null);
+ else
+ goto __disable_irq;
+ } else
+ return IRQ_NONE;
+ }
+ return IRQ_HANDLED;
+
+__disable_irq:
+ PDEBUG(INIT_INFO, "irq(): irq %d is meant to be disabled! So, now try "
+ "to disable it _really_!\n", irq);
+ disable_irq_nosync(irq);
+ return IRQ_HANDLED;
+}
+
+static unsigned short
+snd_ml403_ac97cr_codec_read(struct snd_ac97 *ac97, unsigned short reg)
+{
+ struct snd_ml403_ac97cr *ml403_ac97cr = ac97->private_data;
+#ifdef CODEC_STAT
+ u32 stat;
+ u32 rafaccess = 0;
+#endif
+ unsigned long end_time;
+ u16 value = 0;
+
+ if (!LM4550_RF_OK(reg)) {
+ snd_printk(KERN_WARNING SND_ML403_AC97CR_DRIVER ": "
+ "access to unknown/unused codec register 0x%x "
+ "ignored!\n", reg);
+ return 0;
+ }
+ /* check if we can fake/answer this access from our shadow register */
+ if ((lm4550_regfile[reg / 2].flag &
+ (LM4550_REG_DONEREAD | LM4550_REG_ALLFAKE)) &&
+ !(lm4550_regfile[reg / 2].flag & LM4550_REG_NOSHADOW)) {
+ if (lm4550_regfile[reg / 2].flag & LM4550_REG_FAKEREAD) {
+ PDEBUG(CODEC_FAKE, "codec_read(): faking read from "
+ "reg=0x%x, val=0x%x / %d\n",
+ reg, lm4550_regfile[reg / 2].def,
+ lm4550_regfile[reg / 2].def);
+ return lm4550_regfile[reg / 2].def;
+ } else if ((lm4550_regfile[reg / 2].flag &
+ LM4550_REG_FAKEPROBE) &&
+ ml403_ac97cr->ac97_fake) {
+ PDEBUG(CODEC_FAKE, "codec_read(): faking read from "
+ "reg=0x%x, val=0x%x / %d (probe)\n",
+ reg, lm4550_regfile[reg / 2].value,
+ lm4550_regfile[reg / 2].value);
+ return lm4550_regfile[reg / 2].value;
+ } else {
+#ifdef CODEC_STAT
+ PDEBUG(CODEC_FAKE, "codec_read(): read access "
+ "answered by shadow register 0x%x (value=0x%x "
+ "/ %d) (cw=%d cr=%d)\n",
+ reg, lm4550_regfile[reg / 2].value,
+ lm4550_regfile[reg / 2].value,
+ ml403_ac97cr->ac97_write,
+ ml403_ac97cr->ac97_read);
+#else
+ PDEBUG(CODEC_FAKE, "codec_read(): read access "
+ "answered by shadow register 0x%x (value=0x%x "
+ "/ %d)\n",
+ reg, lm4550_regfile[reg / 2].value,
+ lm4550_regfile[reg / 2].value);
+#endif
+ return lm4550_regfile[reg / 2].value;
+ }
+ }
+ /* if we are here, we _have_ to access the codec really, no faking */
+ if (mutex_lock_interruptible(&ml403_ac97cr->cdc_mutex) != 0)
+ return 0;
+#ifdef CODEC_STAT
+ ml403_ac97cr->ac97_read++;
+#endif
+ spin_lock(&ml403_ac97cr->reg_lock);
+ out_be32(CR_REG(ml403_ac97cr, CODEC_ADDR),
+ CR_CODEC_ADDR(reg) | CR_CODEC_READ);
+ spin_unlock(&ml403_ac97cr->reg_lock);
+ end_time = jiffies + (HZ / CODEC_TIMEOUT_AFTER_READ);
+ do {
+ spin_lock(&ml403_ac97cr->reg_lock);
+#ifdef CODEC_STAT
+ rafaccess++;
+ stat = in_be32(CR_REG(ml403_ac97cr, STATUS));
+ if ((stat & CR_RAF) == CR_RAF) {
+ value = CR_CODEC_DATAREAD(
+ in_be32(CR_REG(ml403_ac97cr, CODEC_DATAREAD)));
+ PDEBUG(CODEC_SUCCESS, "codec_read(): (done) reg=0x%x, "
+ "value=0x%x / %d (STATUS=0x%x)\n",
+ reg, value, value, stat);
+#else
+ if ((in_be32(CR_REG(ml403_ac97cr, STATUS)) &
+ CR_RAF) == CR_RAF) {
+ value = CR_CODEC_DATAREAD(
+ in_be32(CR_REG(ml403_ac97cr, CODEC_DATAREAD)));
+ PDEBUG(CODEC_SUCCESS, "codec_read(): (done) "
+ "reg=0x%x, value=0x%x / %d\n",
+ reg, value, value);
+#endif
+ lm4550_regfile[reg / 2].value = value;
+ lm4550_regfile[reg / 2].flag |= LM4550_REG_DONEREAD;
+ spin_unlock(&ml403_ac97cr->reg_lock);
+ mutex_unlock(&ml403_ac97cr->cdc_mutex);
+ return value;
+ }
+ spin_unlock(&ml403_ac97cr->reg_lock);
+ schedule_timeout_uninterruptible(1);
+ } while (time_after(end_time, jiffies));
+ /* read the DATAREAD register anyway, see comment below */
+ spin_lock(&ml403_ac97cr->reg_lock);
+ value =
+ CR_CODEC_DATAREAD(in_be32(CR_REG(ml403_ac97cr, CODEC_DATAREAD)));
+ spin_unlock(&ml403_ac97cr->reg_lock);
+#ifdef CODEC_STAT
+ snd_printk(KERN_WARNING SND_ML403_AC97CR_DRIVER ": "
+ "timeout while codec read! "
+ "(reg=0x%x, last STATUS=0x%x, DATAREAD=0x%x / %d, %d) "
+ "(cw=%d, cr=%d)\n",
+ reg, stat, value, value, rafaccess,
+ ml403_ac97cr->ac97_write, ml403_ac97cr->ac97_read);
+#else
+ snd_printk(KERN_WARNING SND_ML403_AC97CR_DRIVER ": "
+ "timeout while codec read! "
+ "(reg=0x%x, DATAREAD=0x%x / %d)\n",
+ reg, value, value);
+#endif
+ /* BUG: This is PURE speculation! But after _most_ read timeouts the
+ * value in the register is ok!
+ */
+ lm4550_regfile[reg / 2].value = value;
+ lm4550_regfile[reg / 2].flag |= LM4550_REG_DONEREAD;
+ mutex_unlock(&ml403_ac97cr->cdc_mutex);
+ return value;
+}
+
+static void
+snd_ml403_ac97cr_codec_write(struct snd_ac97 *ac97, unsigned short reg,
+ unsigned short val)
+{
+ struct snd_ml403_ac97cr *ml403_ac97cr = ac97->private_data;
+
+#ifdef CODEC_STAT
+ u32 stat;
+ u32 rafaccess = 0;
+#endif
+#ifdef CODEC_WRITE_CHECK_RAF
+ unsigned long end_time;
+#endif
+
+ if (!LM4550_RF_OK(reg)) {
+ snd_printk(KERN_WARNING SND_ML403_AC97CR_DRIVER ": "
+ "access to unknown/unused codec register 0x%x "
+ "ignored!\n", reg);
+ return;
+ }
+ if (lm4550_regfile[reg / 2].flag & LM4550_REG_READONLY) {
+ snd_printk(KERN_WARNING SND_ML403_AC97CR_DRIVER ": "
+ "write access to read only codec register 0x%x "
+ "ignored!\n", reg);
+ return;
+ }
+ if ((val & lm4550_regfile[reg / 2].wmask) != val) {
+ snd_printk(KERN_WARNING SND_ML403_AC97CR_DRIVER ": "
+ "write access to codec register 0x%x "
+ "with bad value 0x%x / %d!\n",
+ reg, val, val);
+ val = val & lm4550_regfile[reg / 2].wmask;
+ }
+ if (((lm4550_regfile[reg / 2].flag & LM4550_REG_FAKEPROBE) &&
+ ml403_ac97cr->ac97_fake) &&
+ !(lm4550_regfile[reg / 2].flag & LM4550_REG_NOSHADOW)) {
+ PDEBUG(CODEC_FAKE, "codec_write(): faking write to reg=0x%x, "
+ "val=0x%x / %d\n", reg, val, val);
+ lm4550_regfile[reg / 2].value = (val &
+ lm4550_regfile[reg / 2].wmask);
+ return;
+ }
+ if (mutex_lock_interruptible(&ml403_ac97cr->cdc_mutex) != 0)
+ return;
+#ifdef CODEC_STAT
+ ml403_ac97cr->ac97_write++;
+#endif
+ spin_lock(&ml403_ac97cr->reg_lock);
+ out_be32(CR_REG(ml403_ac97cr, CODEC_DATAWRITE),
+ CR_CODEC_DATAWRITE(val));
+ out_be32(CR_REG(ml403_ac97cr, CODEC_ADDR),
+ CR_CODEC_ADDR(reg) | CR_CODEC_WRITE);
+ spin_unlock(&ml403_ac97cr->reg_lock);
+#ifdef CODEC_WRITE_CHECK_RAF
+ /* check CR_CODEC_RAF bit to see if write access to register is done;
+ * loop until bit is set or timeout happens
+ */
+ end_time = jiffies + HZ / CODEC_TIMEOUT_AFTER_WRITE;
+ do {
+ spin_lock(&ml403_ac97cr->reg_lock);
+#ifdef CODEC_STAT
+ rafaccess++;
+ stat = in_be32(CR_REG(ml403_ac97cr, STATUS))
+ if ((stat & CR_RAF) == CR_RAF) {
+#else
+ if ((in_be32(CR_REG(ml403_ac97cr, STATUS)) &
+ CR_RAF) == CR_RAF) {
+#endif
+ PDEBUG(CODEC_SUCCESS, "codec_write(): (done) "
+ "reg=0x%x, value=%d / 0x%x\n",
+ reg, val, val);
+ if (!(lm4550_regfile[reg / 2].flag &
+ LM4550_REG_NOSHADOW) &&
+ !(lm4550_regfile[reg / 2].flag &
+ LM4550_REG_NOSAVE))
+ lm4550_regfile[reg / 2].value = val;
+ lm4550_regfile[reg / 2].flag |= LM4550_REG_DONEREAD;
+ spin_unlock(&ml403_ac97cr->reg_lock);
+ mutex_unlock(&ml403_ac97cr->cdc_mutex);
+ return;
+ }
+ spin_unlock(&ml403_ac97cr->reg_lock);
+ schedule_timeout_uninterruptible(1);
+ } while (time_after(end_time, jiffies));
+#ifdef CODEC_STAT
+ snd_printk(KERN_WARNING SND_ML403_AC97CR_DRIVER ": "
+ "timeout while codec write "
+ "(reg=0x%x, val=0x%x / %d, last STATUS=0x%x, %d) "
+ "(cw=%d, cr=%d)\n",
+ reg, val, val, stat, rafaccess, ml403_ac97cr->ac97_write,
+ ml403_ac97cr->ac97_read);
+#else
+ snd_printk(KERN_WARNING SND_ML403_AC97CR_DRIVER ": "
+ "timeout while codec write (reg=0x%x, val=0x%x / %d)\n",
+ reg, val, val);
+#endif
+#else /* CODEC_WRITE_CHECK_RAF */
+#if CODEC_WAIT_AFTER_WRITE > 0
+ /* officially, in AC97 spec there is no possibility for a AC97
+ * controller to determine, if write access is done or not - so: How
+ * is Xilinx able to provide a RAF bit for write access?
+ * => very strange, thus just don't check RAF bit (compare with
+ * Xilinx's example app in EDK 8.1i) and wait
+ */
+ schedule_timeout_uninterruptible(HZ / CODEC_WAIT_AFTER_WRITE);
+#endif
+ PDEBUG(CODEC_SUCCESS, "codec_write(): (done) "
+ "reg=0x%x, value=%d / 0x%x (no RAF check)\n",
+ reg, val, val);
+#endif
+ mutex_unlock(&ml403_ac97cr->cdc_mutex);
+ return;
+}
+
+static int __devinit
+snd_ml403_ac97cr_chip_init(struct snd_ml403_ac97cr *ml403_ac97cr)
+{
+ unsigned long end_time;
+ PDEBUG(INIT_INFO, "chip_init():\n");
+ end_time = jiffies + HZ / CODEC_TIMEOUT_ON_INIT;
+ do {
+ if (in_be32(CR_REG(ml403_ac97cr, STATUS)) & CR_CODECREADY) {
+ /* clear both hardware FIFOs */
+ out_be32(CR_REG(ml403_ac97cr, RESETFIFO),
+ CR_RECRESET | CR_PLAYRESET);
+ PDEBUG(INIT_INFO, "chip_init(): (done)\n");
+ return 0;
+ }
+ schedule_timeout_uninterruptible(1);
+ } while (time_after(end_time, jiffies));
+ snd_printk(KERN_ERR SND_ML403_AC97CR_DRIVER ": "
+ "timeout while waiting for codec, "
+ "not ready!\n");
+ return -EBUSY;
+}
+
+static int snd_ml403_ac97cr_free(struct snd_ml403_ac97cr *ml403_ac97cr)
+{
+ PDEBUG(INIT_INFO, "free():\n");
+ /* irq release */
+ if (ml403_ac97cr->irq >= 0)
+ free_irq(ml403_ac97cr->irq, ml403_ac97cr);
+ if (ml403_ac97cr->capture_irq >= 0)
+ free_irq(ml403_ac97cr->capture_irq, ml403_ac97cr);
+ /* give back "port" */
+ if (ml403_ac97cr->port != NULL)
+ iounmap(ml403_ac97cr->port);
+ kfree(ml403_ac97cr);
+ PDEBUG(INIT_INFO, "free(): (done)\n");
+ return 0;
+}
+
+static int snd_ml403_ac97cr_dev_free(struct snd_device *snddev)
+{
+ struct snd_ml403_ac97cr *ml403_ac97cr = snddev->device_data;
+ PDEBUG(INIT_INFO, "dev_free():\n");
+ return snd_ml403_ac97cr_free(ml403_ac97cr);
+}
+
+static int __devinit
+snd_ml403_ac97cr_create(struct snd_card *card, struct platform_device *pfdev,
+ struct snd_ml403_ac97cr **rml403_ac97cr)
+{
+ struct snd_ml403_ac97cr *ml403_ac97cr;
+ int err;
+ static struct snd_device_ops ops = {
+ .dev_free = snd_ml403_ac97cr_dev_free,
+ };
+ struct resource *resource;
+ int irq;
+
+ *rml403_ac97cr = NULL;
+ ml403_ac97cr = kzalloc(sizeof(*ml403_ac97cr), GFP_KERNEL);
+ if (ml403_ac97cr == NULL)
+ return -ENOMEM;
+ spin_lock_init(&ml403_ac97cr->reg_lock);
+ mutex_init(&ml403_ac97cr->cdc_mutex);
+ ml403_ac97cr->card = card;
+ ml403_ac97cr->pfdev = pfdev;
+ ml403_ac97cr->irq = -1;
+ ml403_ac97cr->enable_irq = 0;
+ ml403_ac97cr->capture_irq = -1;
+ ml403_ac97cr->enable_capture_irq = 0;
+ ml403_ac97cr->port = NULL;
+ ml403_ac97cr->res_port = NULL;
+
+ PDEBUG(INIT_INFO, "Trying to reserve resources now ...\n");
+ resource = platform_get_resource(pfdev, IORESOURCE_MEM, 0);
+ /* get "port" */
+ ml403_ac97cr->port = ioremap_nocache(resource->start,
+ (resource->end) -
+ (resource->start) + 1);
+ if (ml403_ac97cr->port == NULL) {
+ snd_printk(KERN_ERR SND_ML403_AC97CR_DRIVER ": "
+ "unable to remap memory region (%x to %x)\n",
+ resource->start, resource->end);
+ snd_ml403_ac97cr_free(ml403_ac97cr);
+ return -EBUSY;
+ }
+ snd_printk(KERN_INFO SND_ML403_AC97CR_DRIVER ": "
+ "remap controller memory region to "
+ "0x%x done\n", (unsigned int)ml403_ac97cr->port);
+ /* get irq */
+ irq = platform_get_irq(pfdev, 0);
+ if (request_irq(irq, snd_ml403_ac97cr_irq, IRQF_DISABLED,
+ pfdev->dev.bus_id, (void *)ml403_ac97cr)) {
+ snd_printk(KERN_ERR SND_ML403_AC97CR_DRIVER ": "
+ "unable to grab IRQ %d\n",
+ irq);
+ snd_ml403_ac97cr_free(ml403_ac97cr);
+ return -EBUSY;
+ }
+ ml403_ac97cr->irq = irq;
+ snd_printk(KERN_INFO SND_ML403_AC97CR_DRIVER ": "
+ "request (playback) irq %d done\n",
+ ml403_ac97cr->irq);
+ irq = platform_get_irq(pfdev, 1);
+ if (request_irq(irq, snd_ml403_ac97cr_irq, IRQF_DISABLED,
+ pfdev->dev.bus_id, (void *)ml403_ac97cr)) {
+ snd_printk(KERN_ERR SND_ML403_AC97CR_DRIVER ": "
+ "unable to grab IRQ %d\n",
+ irq);
+ snd_ml403_ac97cr_free(ml403_ac97cr);
+ return -EBUSY;
+ }
+ ml403_ac97cr->capture_irq = irq;
+ snd_printk(KERN_INFO SND_ML403_AC97CR_DRIVER ": "
+ "request (capture) irq %d done\n",
+ ml403_ac97cr->capture_irq);
+
+ err = snd_ml403_ac97cr_chip_init(ml403_ac97cr);
+ if (err < 0) {
+ snd_ml403_ac97cr_free(ml403_ac97cr);
+ return err;
+ }
+
+ err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, ml403_ac97cr, &ops);
+ if (err < 0) {
+ PDEBUG(INIT_FAILURE, "probe(): snd_device_new() failed!\n");
+ snd_ml403_ac97cr_free(ml403_ac97cr);
+ return err;
+ }
+
+ snd_card_set_dev(card, &pfdev->dev);
+
+ *rml403_ac97cr = ml403_ac97cr;
+ return 0;
+}
+
+static void snd_ml403_ac97cr_mixer_free(struct snd_ac97 *ac97)
+{
+ struct snd_ml403_ac97cr *ml403_ac97cr = ac97->private_data;
+ PDEBUG(INIT_INFO, "mixer_free():\n");
+ ml403_ac97cr->ac97 = NULL;
+ PDEBUG(INIT_INFO, "mixer_free(): (done)\n");
+}
+
+static int __devinit
+snd_ml403_ac97cr_mixer(struct snd_ml403_ac97cr *ml403_ac97cr)
+{
+ struct snd_ac97_bus *bus;
+ struct snd_ac97_template ac97;
+ int err;
+ static struct snd_ac97_bus_ops ops = {
+ .write = snd_ml403_ac97cr_codec_write,
+ .read = snd_ml403_ac97cr_codec_read,
+ };
+ PDEBUG(INIT_INFO, "mixer():\n");
+ err = snd_ac97_bus(ml403_ac97cr->card, 0, &ops, NULL, &bus);
+ if (err < 0)
+ return err;
+
+ memset(&ac97, 0, sizeof(ac97));
+ ml403_ac97cr->ac97_fake = 1;
+ lm4550_regfile_init();
+#ifdef CODEC_STAT
+ ml403_ac97cr->ac97_read = 0;
+ ml403_ac97cr->ac97_write = 0;
+#endif
+ ac97.private_data = ml403_ac97cr;
+ ac97.private_free = snd_ml403_ac97cr_mixer_free;
+ ac97.scaps = AC97_SCAP_AUDIO | AC97_SCAP_SKIP_MODEM |
+ AC97_SCAP_NO_SPDIF;
+ err = snd_ac97_mixer(bus, &ac97, &ml403_ac97cr->ac97);
+ ml403_ac97cr->ac97_fake = 0;
+ lm4550_regfile_write_values_after_init(ml403_ac97cr->ac97);
+ PDEBUG(INIT_INFO, "mixer(): (done) snd_ac97_mixer()=%d\n", err);
+ return err;
+}
+
+static int __devinit
+snd_ml403_ac97cr_pcm(struct snd_ml403_ac97cr *ml403_ac97cr, int device,
+ struct snd_pcm **rpcm)
+{
+ struct snd_pcm *pcm;
+ int err;
+
+ if (rpcm)
+ *rpcm = NULL;
+ err = snd_pcm_new(ml403_ac97cr->card, "ML403AC97CR/1", device, 1, 1,
+ &pcm);
+ if (err < 0)
+ return err;
+ snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
+ &snd_ml403_ac97cr_playback_ops);
+ snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
+ &snd_ml403_ac97cr_capture_ops);
+ pcm->private_data = ml403_ac97cr;
+ pcm->info_flags = 0;
+ strcpy(pcm->name, "ML403AC97CR DAC/ADC");
+ ml403_ac97cr->pcm = pcm;
+
+ snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS,
+ snd_dma_continuous_data(GFP_KERNEL),
+ 64 * 1024,
+ 128 * 1024);
+ if (rpcm)
+ *rpcm = pcm;
+ return 0;
+}
+
+static int __devinit snd_ml403_ac97cr_probe(struct platform_device *pfdev)
+{
+ struct snd_card *card;
+ struct snd_ml403_ac97cr *ml403_ac97cr = NULL;
+ int err;
+ int dev = pfdev->id;
+
+ if (dev >= SNDRV_CARDS)
+ return -ENODEV;
+ if (!enable[dev])
+ return -ENOENT;
+
+ card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0);
+ if (card == NULL)
+ return -ENOMEM;
+ err = snd_ml403_ac97cr_create(card, pfdev, &ml403_ac97cr);
+ if (err < 0) {
+ PDEBUG(INIT_FAILURE, "probe(): create failed!\n");
+ snd_card_free(card);
+ return err;
+ }
+ PDEBUG(INIT_INFO, "probe(): create done\n");
+ card->private_data = ml403_ac97cr;
+ err = snd_ml403_ac97cr_mixer(ml403_ac97cr);
+ if (err < 0) {
+ snd_card_free(card);
+ return err;
+ }
+ PDEBUG(INIT_INFO, "probe(): mixer done\n");
+ err = snd_ml403_ac97cr_pcm(ml403_ac97cr, 0, NULL);
+ if (err < 0) {
+ snd_card_free(card);
+ return err;
+ }
+ PDEBUG(INIT_INFO, "probe(): PCM done\n");
+ strcpy(card->driver, SND_ML403_AC97CR_DRIVER);
+ strcpy(card->shortname, "ML403 AC97 Controller Reference");
+ sprintf(card->longname, "%s %s at 0x%lx, irq %i & %i, device %i",
+ card->shortname, card->driver,
+ (unsigned long)ml403_ac97cr->port, ml403_ac97cr->irq,
+ ml403_ac97cr->capture_irq, dev + 1);
+
+ err = snd_card_register(card);
+ if (err < 0) {
+ snd_card_free(card);
+ return err;
+ }
+ platform_set_drvdata(pfdev, card);
+ PDEBUG(INIT_INFO, "probe(): (done)\n");
+ return 0;
+}
+
+static int snd_ml403_ac97cr_remove(struct platform_device *pfdev)
+{
+ snd_card_free(platform_get_drvdata(pfdev));
+ platform_set_drvdata(pfdev, NULL);
+ return 0;
+}
+
+static struct platform_driver snd_ml403_ac97cr_driver = {
+ .probe = snd_ml403_ac97cr_probe,
+ .remove = snd_ml403_ac97cr_remove,
+ .driver = {
+ .name = SND_ML403_AC97CR_DRIVER,
+ },
+};
+
+static int __init alsa_card_ml403_ac97cr_init(void)
+{
+ return platform_driver_register(&snd_ml403_ac97cr_driver);
+}
+
+static void __exit alsa_card_ml403_ac97cr_exit(void)
+{
+ platform_driver_unregister(&snd_ml403_ac97cr_driver);
+}
+
+module_init(alsa_card_ml403_ac97cr_init)
+module_exit(alsa_card_ml403_ac97cr_exit)
diff --git a/sound/drivers/pcm-indirect2.c b/sound/drivers/pcm-indirect2.c
new file mode 100644
index 0000000..a36215a
--- /dev/null
+++ b/sound/drivers/pcm-indirect2.c
@@ -0,0 +1,591 @@
+/*
+ * Helper functions for indirect PCM data transfer to a simple FIFO in
+ * hardware (small, no possibility to read "hardware io position",
+ * updating position done by interrupt, ...)
+ *
+ * Copyright (c) by 2007 Joachim Foerster <JOFT at gmx.de>
+ *
+ * Based on "pcm-indirect.h" (alsa-driver-1.0.13) by
+ *
+ * Copyright (c) by Takashi Iwai <tiwai at suse.de>
+ * Jaroslav Kysela <perex at suse.cz>
+ *
+ * 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; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+/* #dependency of sound/core.h# */
+#include <sound/driver.h>
+/* snd_printk/d() */
+#include <sound/core.h>
+/* struct snd_pcm_substream, struct snd_pcm_runtime, snd_pcm_uframes_t
+ * snd_pcm_period_elapsed() */
+#include <sound/pcm.h>
+
+#include "pcm-indirect2.h"
+
+#ifdef SND_PCM_INDIRECT2_STAT
+/* jiffies */
+#include <linux/jiffies.h>
+
+void snd_pcm_indirect2_stat(struct snd_pcm_substream *substream,
+ struct snd_pcm_indirect2 *rec)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ int i;
+ int j;
+ int k;
+ int seconds = (rec->lastbytetime - rec->firstbytetime) / HZ;
+
+ snd_printk(KERN_DEBUG "STAT: mul_elapsed: %u, mul_elapsed_real: %d, "
+ "irq_occured: %d\n",
+ rec->mul_elapsed, rec->mul_elapsed_real, rec->irq_occured);
+ snd_printk(KERN_DEBUG "STAT: min_multiple: %d (irqs/period)\n",
+ rec->min_multiple);
+ snd_printk(KERN_DEBUG "STAT: firstbytetime: %lu, lastbytetime: %lu, "
+ "firstzerotime: %lu\n",
+ rec->firstbytetime, rec->lastbytetime, rec->firstzerotime);
+ snd_printk(KERN_DEBUG "STAT: bytes2hw: %u Bytes => (by runtime->rate) "
+ "length: %d s\n",
+ rec->bytes2hw, rec->bytes2hw / 2 / 2 / runtime->rate);
+ snd_printk(KERN_DEBUG "STAT: (by measurement) length: %d => "
+ "rate: %d Bytes/s = %d Frames/s|Hz\n",
+ seconds, rec->bytes2hw / seconds,
+ rec->bytes2hw / 2 / 2 / seconds);
+ snd_printk(KERN_DEBUG
+ "STAT: zeros2hw: %u = %d ms ~ %d * %d zero copies\n",
+ rec->zeros2hw, ((rec->zeros2hw / 2 / 2) * 1000) /
+ runtime->rate,
+ rec->zeros2hw / (rec->hw_buffer_size / 2),
+ (rec->hw_buffer_size / 2));
+ snd_printk(KERN_DEBUG "STAT: pointer_calls: %u, lastdifftime: %u\n",
+ rec->pointer_calls, rec->lastdifftime);
+ snd_printk(KERN_DEBUG "STAT: sw_io: %d, sw_data: %d\n", rec->sw_io,
+ rec->sw_data);
+ snd_printk(KERN_DEBUG "STAT: byte_sizes[]:\n");
+ k = 0;
+ for (j = 0; j < 8; j++) {
+ for (i = j * 8; i < (j + 1) * 8; i++)
+ if (rec->byte_sizes[i] != 0) {
+ snd_printk(KERN_DEBUG "%u: %u",
+ i, rec->byte_sizes[i]);
+ k++;
+ }
+ if (((k % 8) == 0) && (k != 0)) {
+ snd_printk(KERN_DEBUG "\n");
+ k = 0;
+ }
+ }
+ snd_printk(KERN_DEBUG "\n");
+ snd_printk(KERN_DEBUG "STAT: zero_sizes[]:\n");
+ for (j = 0; j < 8; j++) {
+ k = 0;
+ for (i = j * 8; i < (j + 1) * 8; i++)
+ if (rec->zero_sizes[i] != 0)
+ snd_printk(KERN_DEBUG "%u: %u",
+ i, rec->zero_sizes[i]);
+ else
+ k++;
+ if (!k)
+ snd_printk(KERN_DEBUG "\n");
+ }
+ snd_printk(KERN_DEBUG "\n");
+ snd_printk(KERN_DEBUG "STAT: min_adds[]:\n");
+ for (j = 0; j < 8; j++) {
+ if (rec->min_adds[j] != 0)
+ snd_printk(KERN_DEBUG "%u: %u", j, rec->min_adds[j]);
+ }
+ snd_printk(KERN_DEBUG "\n");
+ snd_printk(KERN_DEBUG "STAT: mul_adds[]:\n");
+ for (j = 0; j < 8; j++) {
+ if (rec->mul_adds[j] != 0)
+ snd_printk(KERN_DEBUG "%u: %u", j, rec->mul_adds[j]);
+ }
+ snd_printk(KERN_DEBUG "\n");
+ snd_printk(KERN_DEBUG
+ "STAT: zero_times_saved: %d, zero_times_notsaved: %d\n",
+ rec->zero_times_saved, rec->zero_times_notsaved);
+ /* snd_printk(KERN_DEBUG "STAT: zero_times[]\n");
+ i = 0;
+ for (j = 0; j < 3750; j++) {
+ if (rec->zero_times[j] != 0) {
+ snd_printk(KERN_DEBUG "%u: %u", j, rec->zero_times[j]);
+ i++;
+ }
+ if (((i % 8) == 0) && (i != 0))
+ snd_printk(KERN_DEBUG "\n");
+ }
+ snd_printk(KERN_DEBUG "\n"); */
+ return;
+}
+#endif
+
+/*
+ * _internal_ helper function for playback/capture transfer function
+ */
+static void
+snd_pcm_indirect2_increase_min_periods(struct snd_pcm_substream *substream,
+ struct snd_pcm_indirect2 *rec,
+ int isplay, int iscopy,
+ unsigned int bytes)
+{
+ if (rec->min_periods >= 0) {
+ if (iscopy) {
+ rec->sw_io += bytes;
+ if (rec->sw_io >= rec->sw_buffer_size)
+ rec->sw_io -= rec->sw_buffer_size;
+ } else if (isplay) {
+ /* If application does not write data in multiples of
+ * a period, move sw_data to the next correctly aligned
+ * position, so that sw_io can converge to it (in the
+ * next step).
+ */
+ if (!rec->check_alignment) {
+ if (rec->bytes2hw %
+ snd_pcm_lib_period_bytes(substream)) {
+ unsigned bytes2hw_aligned =
+ (1 +
+ (rec->bytes2hw /
+ snd_pcm_lib_period_bytes
+ (substream))) *
+ snd_pcm_lib_period_bytes
+ (substream);
+ rec->sw_data =
+ bytes2hw_aligned %
+ rec->sw_buffer_size;
+#ifdef SND_PCM_INDIRECT2_STAT
+ snd_printk(KERN_DEBUG
+ "STAT: @re-align: aligned "
+ "bytes2hw to next period "
+ "size boundary: %d "
+ "(instead of %d)\n",
+ bytes2hw_aligned,
+ rec->bytes2hw);
+ snd_printk(KERN_DEBUG
+ "STAT: @re-align: sw_data "
+ "moves to: %d\n",
+ rec->sw_data);
+#endif
+ }
+ rec->check_alignment = 1;
+ }
+ /* We are at the end and are copying zeros into the
+ * fifo.
+ * Now, we have to make sure that sw_io is increased
+ * until the position of sw_data: Filling the fifo with
+ * the first zeros means, the last bytes were played.
+ */
+ if (rec->sw_io != rec->sw_data) {
+ unsigned int diff;
+ if (rec->sw_data > rec->sw_io)
+ diff = rec->sw_data - rec->sw_io;
+ else
+ diff = (rec->sw_buffer_size -
+ rec->sw_io) +
+ rec->sw_data;
+ if (bytes >= diff)
+ rec->sw_io = rec->sw_data;
+ else {
+ rec->sw_io += bytes;
+ if (rec->sw_io >= rec->sw_buffer_size)
+ rec->sw_io -=
+ rec->sw_buffer_size;
+ }
+ }
+ }
+ rec->min_period_count += bytes;
+ if (rec->min_period_count >= (rec->hw_buffer_size / 2)) {
+ rec->min_periods += (rec->min_period_count /
+ (rec->hw_buffer_size / 2));
+#ifdef SND_PCM_INDIRECT2_STAT
+ if ((rec->min_period_count /
+ (rec->hw_buffer_size / 2)) > 7)
+ snd_printk(KERN_DEBUG
+ "STAT: more than 7 (%d) min_adds "
+ "at once - too big to save!\n",
+ (rec->min_period_count /
+ (rec->hw_buffer_size / 2)));
+ else
+ rec->min_adds[(rec->min_period_count /
+ (rec->hw_buffer_size / 2))]++;
+#endif
+ rec->min_period_count = (rec->min_period_count %
+ (rec->hw_buffer_size / 2));
+ }
+ } else if (isplay && iscopy)
+ rec->min_periods = 0;
+}
+
+/*
+ * helper function for playback/capture pointer callback
+ */
+snd_pcm_uframes_t
+snd_pcm_indirect2_pointer(struct snd_pcm_substream *substream,
+ struct snd_pcm_indirect2 *rec)
+{
+#ifdef SND_PCM_INDIRECT2_STAT
+ rec->pointer_calls++;
+#endif
+ return bytes_to_frames(substream->runtime, rec->sw_io);
+}
+
+/*
+ * _internal_ helper function for playback interrupt callback
+ */
+static void
+snd_pcm_indirect2_playback_transfer(struct snd_pcm_substream *substream,
+ struct snd_pcm_indirect2 *rec,
+ snd_pcm_indirect2_copy_t copy,
+ snd_pcm_indirect2_zero_t zero)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ snd_pcm_uframes_t appl_ptr = runtime->control->appl_ptr;
+
+ /* runtime->control->appl_ptr: position where ALSA will write next time
+ * rec->appl_ptr: position where ALSA was last time
+ * diff: obviously ALSA wrote that much bytes into the intermediate
+ * buffer since we checked last time
+ */
+ snd_pcm_sframes_t diff = appl_ptr - rec->appl_ptr;
+
+ if (diff) {
+#ifdef SND_PCM_INDIRECT2_STAT
+ rec->lastdifftime = jiffies;
+#endif
+ if (diff < -(snd_pcm_sframes_t) (runtime->boundary / 2))
+ diff += runtime->boundary;
+ /* number of bytes "added" by ALSA increases the number of
+ * bytes which are ready to "be transfered to HW"/"played"
+ * Then, set rec->appl_ptr to not count bytes twice next time.
+ */
+ rec->sw_ready += (int)frames_to_bytes(runtime, diff);
+ rec->appl_ptr = appl_ptr;
+ }
+ if (rec->hw_ready && (rec->sw_ready <= 0)) {
+ unsigned int bytes;
+
+#ifdef SND_PCM_INDIRECT2_STAT
+ if (rec->firstzerotime == 0) {
+ rec->firstzerotime = jiffies;
+ snd_printk(KERN_DEBUG
+ "STAT: @firstzerotime: mul_elapsed: %d, "
+ "min_period_count: %d\n",
+ rec->mul_elapsed, rec->min_period_count);
+ snd_printk(KERN_DEBUG
+ "STAT: @firstzerotime: sw_io: %d, "
+ "sw_data: %d, appl_ptr: %u\n",
+ rec->sw_io, rec->sw_data,
+ (unsigned int)appl_ptr);
+ }
+ if ((jiffies - rec->firstzerotime) < 3750) {
+ rec->zero_times[(jiffies - rec->firstzerotime)]++;
+ rec->zero_times_saved++;
+ } else
+ rec->zero_times_notsaved++;
+#endif
+ bytes = zero(substream, rec);
+
+#ifdef SND_PCM_INDIRECT2_STAT
+ rec->zeros2hw += bytes;
+ if (bytes < 64)
+ rec->zero_sizes[bytes]++;
+ else
+ snd_printk(KERN_DEBUG
+ "STAT: %d zero Bytes copied to hardware at "
+ "once - too big to save!\n",
+ bytes);
+#endif
+ snd_pcm_indirect2_increase_min_periods(substream, rec, 1, 0,
+ bytes);
+ return;
+ }
+ while (rec->hw_ready && (rec->sw_ready > 0)) {
+ /* sw_to_end: max. number of bytes that can be read/take from
+ * the current position (sw_data) in _one_ step
+ */
+ unsigned int sw_to_end = rec->sw_buffer_size - rec->sw_data;
+
+ /* bytes: number of bytes we have available (for reading) */
+ unsigned int bytes = rec->sw_ready;
+
+ if (sw_to_end < bytes)
+ bytes = sw_to_end;
+ if (!bytes)
+ break;
+
+#ifdef SND_PCM_INDIRECT2_STAT
+ if (rec->firstbytetime == 0)
+ rec->firstbytetime = jiffies;
+ rec->lastbytetime = jiffies;
+#endif
+ /* copy bytes from intermediate buffer position sw_data to the
+ * HW and return number of bytes actually written
+ * Furthermore, set hw_ready to 0, if the fifo isn't empty
+ * now => more could be transfered to fifo
+ */
+ bytes = copy(substream, rec, bytes);
+ rec->bytes2hw += bytes;
+
+#ifdef SND_PCM_INDIRECT2_STAT
+ if (bytes < 64)
+ rec->byte_sizes[bytes]++;
+ else
+ snd_printk(KERN_DEBUG
+ "STAT: %d Bytes copied to hardware at once "
+ "- too big to save!\n",
+ bytes);
+#endif
+ /* increase sw_data by the number of actually written bytes
+ * (= number of taken bytes from intermediate buffer)
+ */
+ rec->sw_data += bytes;
+ if (rec->sw_data == rec->sw_buffer_size)
+ rec->sw_data = 0;
+ /* now sw_data is the position where ALSA is going to write
+ * in the intermediate buffer next time = position we are going
+ * to read from next time
+ */
+
+ snd_pcm_indirect2_increase_min_periods(substream, rec, 1, 1,
+ bytes);
+
+ /* we read bytes from intermediate buffer, so we need to say
+ * that the number of bytes ready for transfer are decreased
+ * now
+ */
+ rec->sw_ready -= bytes;
+ }
+ return;
+}
+
+/*
+ * helper function for playback interrupt routine
+ */
+void
+snd_pcm_indirect2_playback_interrupt(struct snd_pcm_substream *substream,
+ struct snd_pcm_indirect2 *rec,
+ snd_pcm_indirect2_copy_t copy,
+ snd_pcm_indirect2_zero_t zero)
+{
+#ifdef SND_PCM_INDIRECT2_STAT
+ rec->irq_occured++;
+#endif
+ /* hardware played some bytes, so there is room again (in fifo) */
+ rec->hw_ready = 1;
+
+ /* don't call ack() now, instead call transfer() function directly
+ * (normally called by ack() )
+ */
+ snd_pcm_indirect2_playback_transfer(substream, rec, copy, zero);
+
+ if (rec->min_periods >= rec->min_multiple) {
+#ifdef SND_PCM_INDIRECT2_STAT
+ if ((rec->min_periods / rec->min_multiple) > 7)
+ snd_printk(KERN_DEBUG
+ "STAT: more than 7 (%d) mul_adds - too big "
+ "to save!\n",
+ (rec->min_periods / rec->min_multiple));
+ else
+ rec->mul_adds[(rec->min_periods /
+ rec->min_multiple)]++;
+ rec->mul_elapsed_real += (rec->min_periods /
+ rec->min_multiple);
+ rec->mul_elapsed++;
+#endif
+ rec->min_periods = 0;
+ snd_pcm_period_elapsed(substream);
+ }
+}
+
+/*
+ * _internal_ helper function for capture interrupt callback
+ */
+static void
+snd_pcm_indirect2_capture_transfer(struct snd_pcm_substream *substream,
+ struct snd_pcm_indirect2 *rec,
+ snd_pcm_indirect2_copy_t copy,
+ snd_pcm_indirect2_zero_t null)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ snd_pcm_uframes_t appl_ptr = runtime->control->appl_ptr;
+ snd_pcm_sframes_t diff = appl_ptr - rec->appl_ptr;
+
+ if (diff) {
+#ifdef SND_PCM_INDIRECT2_STAT
+ rec->lastdifftime = jiffies;
+#endif
+ if (diff < -(snd_pcm_sframes_t) (runtime->boundary / 2))
+ diff += runtime->boundary;
+ rec->sw_ready -= frames_to_bytes(runtime, diff);
+ rec->appl_ptr = appl_ptr;
+ }
+ /* if hardware has something, but the intermediate buffer is full
+ * => skip contents of buffer
+ */
+ if (rec->hw_ready && (rec->sw_ready >= (int)rec->sw_buffer_size)) {
+ unsigned int bytes;
+
+#ifdef SND_PCM_INDIRECT2_STAT
+ if (rec->firstzerotime == 0) {
+ rec->firstzerotime = jiffies;
+ snd_printk(KERN_DEBUG "STAT: (capture) "
+ "@firstzerotime: mul_elapsed: %d, "
+ "min_period_count: %d\n",
+ rec->mul_elapsed, rec->min_period_count);
+ snd_printk(KERN_DEBUG "STAT: (capture) "
+ "@firstzerotime: sw_io: %d, sw_data: %d, "
+ "appl_ptr: %u\n",
+ rec->sw_io, rec->sw_data,
+ (unsigned int)appl_ptr);
+ }
+ if ((jiffies - rec->firstzerotime) < 3750) {
+ rec->zero_times[(jiffies - rec->firstzerotime)]++;
+ rec->zero_times_saved++;
+ } else
+ rec->zero_times_notsaved++;
+#endif
+ bytes = null(substream, rec);
+
+#ifdef SND_PCM_INDIRECT2_STAT
+ rec->zeros2hw += bytes;
+ if (bytes < 64)
+ rec->zero_sizes[bytes]++;
+ else
+ snd_printk(KERN_DEBUG
+ "STAT: (capture) %d zero Bytes copied to "
+ "hardware at once - too big to save!\n",
+ bytes);
+#endif
+ snd_pcm_indirect2_increase_min_periods(substream, rec, 0, 0,
+ bytes);
+ /* report an overrun */
+ rec->sw_io = SNDRV_PCM_POS_XRUN;
+ return;
+ }
+ while (rec->hw_ready && (rec->sw_ready < (int)rec->sw_buffer_size)) {
+ /* sw_to_end: max. number of bytes that we can write to the
+ * intermediate buffer (until it's end)
+ */
+ size_t sw_to_end = rec->sw_buffer_size - rec->sw_data;
+
+ /* bytes: max. number of bytes, which may be copied to the
+ * intermediate buffer without overflow (in _one_ step)
+ */
+ size_t bytes = rec->sw_buffer_size - rec->sw_ready;
+
+ /* limit number of bytes (for transfer) by available room in
+ * the intermediate buffer
+ */
+ if (sw_to_end < bytes)
+ bytes = sw_to_end;
+ if (!bytes)
+ break;
+
+#ifdef SND_PCM_INDIRECT2_STAT
+ if (rec->firstbytetime == 0)
+ rec->firstbytetime = jiffies;
+ rec->lastbytetime = jiffies;
+#endif
+ /* copy bytes from the intermediate buffer (position sw_data)
+ * to the HW at most and return number of bytes actually copied
+ * from HW
+ * Furthermore, set hw_ready to 0, if the fifo is empty now.
+ */
+ bytes = copy(substream, rec, bytes);
+ rec->bytes2hw += bytes;
+
+#ifdef SND_PCM_INDIRECT2_STAT
+ if (bytes < 64)
+ rec->byte_sizes[bytes]++;
+ else
+ snd_printk(KERN_DEBUG
+ "STAT: (capture) %d Bytes copied to "
+ "hardware at once - too big to save!\n",
+ bytes);
+#endif
+ /* increase sw_data by the number of actually copied bytes from
+ * HW
+ */
+ rec->sw_data += bytes;
+ if (rec->sw_data == rec->sw_buffer_size)
+ rec->sw_data = 0;
+
+ snd_pcm_indirect2_increase_min_periods(substream, rec, 0, 1,
+ bytes);
+
+ /* number of bytes in the intermediate buffer, which haven't
+ * been fetched by ALSA yet.
+ */
+ rec->sw_ready += bytes;
+ }
+ return;
+}
+
+/*
+ * helper function for capture interrupt routine
+ */
+void
+snd_pcm_indirect2_capture_interrupt(struct snd_pcm_substream *substream,
+ struct snd_pcm_indirect2 *rec,
+ snd_pcm_indirect2_copy_t copy,
+ snd_pcm_indirect2_zero_t null)
+{
+#ifdef SND_PCM_INDIRECT2_STAT
+ rec->irq_occured++;
+#endif
+ /* hardware recorded some bytes, so there is something to read from the
+ * record fifo:
+ */
+ rec->hw_ready = 1;
+
+ /* don't call ack() now, instead call transfer() function directly
+ * (normally called by ack() )
+ */
+ snd_pcm_indirect2_capture_transfer(substream, rec, copy, null);
+
+ if (rec->min_periods >= rec->min_multiple) {
+
+#ifdef SND_PCM_INDIRECT2_STAT
+ if ((rec->min_periods / rec->min_multiple) > 7)
+ snd_printk(KERN_DEBUG
+ "STAT: more than 7 (%d) mul_adds - "
+ "too big to save!\n",
+ (rec->min_periods / rec->min_multiple));
+ else
+ rec->mul_adds[(rec->min_periods /
+ rec->min_multiple)]++;
+ rec->mul_elapsed_real += (rec->min_periods /
+ rec->min_multiple);
+ rec->mul_elapsed++;
+
+ if (!(rec->mul_elapsed % 4)) {
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ unsigned int appl_ptr =
+ frames_to_bytes(runtime,
+ (unsigned int)runtime->control->
+ appl_ptr) % rec->sw_buffer_size;
+ int diff = rec->sw_data - appl_ptr;
+ if (diff < 0)
+ diff += rec->sw_buffer_size;
+ snd_printk(KERN_DEBUG
+ "STAT: mul_elapsed: %d, sw_data: %u, "
+ "appl_ptr (bytes): %u, diff: %d\n",
+ rec->mul_elapsed, rec->sw_data, appl_ptr,
+ diff);
+ }
+#endif
+ rec->min_periods = 0;
+ snd_pcm_period_elapsed(substream);
+ }
+}
diff --git a/sound/drivers/pcm-indirect2.h b/sound/drivers/pcm-indirect2.h
new file mode 100644
index 0000000..859cd7a
--- /dev/null
+++ b/sound/drivers/pcm-indirect2.h
@@ -0,0 +1,140 @@
+/*
+ * Helper functions for indirect PCM data transfer to a simple FIFO in
+ * hardware (small, no possibility to read "hardware io position",
+ * updating position done by interrupt, ...)
+ *
+ * Copyright (c) by 2007 Joachim Foerster <JOFT at gmx.de>
+ *
+ * Based on "pcm-indirect.h" (alsa-driver-1.0.13) by
+ *
+ * Copyright (c) by Takashi Iwai <tiwai at suse.de>
+ * Jaroslav Kysela <perex at suse.cz>
+ *
+ * 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; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#ifndef __SOUND_PCM_INDIRECT2_H
+#define __SOUND_PCM_INDIRECT2_H
+
+/* struct snd_pcm_substream, struct snd_pcm_runtime, snd_pcm_uframes_t */
+#include <sound/pcm.h>
+
+/* Debug options for code which may be removed completely in a final version */
+#ifdef CONFIG_SND_DEBUG
+#define SND_PCM_INDIRECT2_STAT /* turn on some "statistics" about the
+ * process of copying bytes from the
+ * intermediate buffer to the hardware
+ * fifo and the other way round
+ */
+#endif
+
+struct snd_pcm_indirect2 {
+ unsigned int hw_buffer_size; /* Byte size of hardware buffer */
+ int hw_ready; /* playback: 1 = hw fifo has room left,
+ * 0 = hw fifo is full
+ */
+ unsigned int min_multiple;
+ int min_periods; /* counts number of min. periods until
+ * min_multiple is reached
+ */
+ int min_period_count; /* counts bytes to count number of
+ * min. periods
+ */
+
+ unsigned int sw_buffer_size; /* Byte size of software buffer */
+
+ /* sw_data: position in intermediate buffer, where we will read (or
+ * write) from/to next time (to transfer data to/from HW)
+ */
+ unsigned int sw_data; /* Offset to next dst (or src) in sw
+ * ring buffer
+ */
+ /* easiest case (playback):
+ * sw_data is nearly the same as ~ runtime->control->appl_ptr, with the
+ * exception that sw_data is "behind" by the number if bytes ALSA wrote
+ * to the intermediate buffer last time.
+ * A call to ack() callback synchronizes both indirectly.
+ */
+
+ /* We have no real sw_io pointer here. Usually sw_io is pointing to the
+ * current playback/capture position _inside_ the hardware. Devices
+ * with plain FIFOs often have no possibility to publish this position.
+ * So we say: if sw_data is updated, that means bytes were copied to
+ * the hardware, we increase sw_io by that amount, because there have
+ * to be as much bytes which were played. So sw_io will stay behind
+ * sw_data all the time and has to converge to sw_data at the end of
+ * playback.
+ */
+ unsigned int sw_io; /* Current software pointer in bytes */
+
+ /* sw_ready: number of bytes ALSA copied to the intermediate buffer, so
+ * it represents the number of bytes which wait for transfer to the HW
+ */
+ int sw_ready; /* Bytes ready to be transferred to/from hw */
+
+ /* appl_ptr: last known position of ALSA (where ALSA is going to write
+ * next time into the intermediate buffer
+ */
+ snd_pcm_uframes_t appl_ptr; /* Last seen appl_ptr */
+
+ unsigned int bytes2hw;
+ int check_alignment;
+
+#ifdef SND_PCM_INDIRECT2_STAT
+ unsigned int zeros2hw;
+ unsigned int mul_elapsed;
+ unsigned int mul_elapsed_real;
+ unsigned long firstbytetime;
+ unsigned long lastbytetime;
+ unsigned long firstzerotime;
+ unsigned int byte_sizes[64];
+ unsigned int zero_sizes[64];
+ unsigned int min_adds[8];
+ unsigned int mul_adds[8];
+ unsigned int zero_times[3750]; /* = 15s */
+ unsigned int zero_times_saved;
+ unsigned int zero_times_notsaved;
+ unsigned int irq_occured;
+ unsigned int pointer_calls;
+ unsigned int lastdifftime;
+#endif
+};
+
+typedef size_t(*snd_pcm_indirect2_copy_t) (struct snd_pcm_substream *substream,
+ struct snd_pcm_indirect2 *rec,
+ size_t bytes);
+typedef size_t(*snd_pcm_indirect2_zero_t) (struct snd_pcm_substream *substream,
+ struct snd_pcm_indirect2 *rec);
+
+#ifdef SND_PCM_INDIRECT2_STAT
+void snd_pcm_indirect2_stat(struct snd_pcm_substream *substream,
+ struct snd_pcm_indirect2 *rec);
+#endif
+
+snd_pcm_uframes_t
+snd_pcm_indirect2_pointer(struct snd_pcm_substream *substream,
+ struct snd_pcm_indirect2 *rec);
+void
+snd_pcm_indirect2_playback_interrupt(struct snd_pcm_substream *substream,
+ struct snd_pcm_indirect2 *rec,
+ snd_pcm_indirect2_copy_t copy,
+ snd_pcm_indirect2_zero_t zero);
+void
+snd_pcm_indirect2_capture_interrupt(struct snd_pcm_substream *substream,
+ struct snd_pcm_indirect2 *rec,
+ snd_pcm_indirect2_copy_t copy,
+ snd_pcm_indirect2_zero_t null);
+
+#endif /* __SOUND_PCM_INDIRECT2_H */
--
1.5.2.4
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