[ALSA] ALS4000 update
Modules: SB drivers,ALS4000 driver
some update for the ALS4000 driver (tested with hardware in my PC):
- use common control names according to ControlNames.txt
- add some controls (Master Mono, 3D control)
- optimize struct snd_card_als4000_t layout (performance/size)
- save some bytes via unified error path
- constify some read-only data
- add ToDo list
- move GPL license text to top
- add comments
Signed-off-by: Andreas Mohr <andi@lisas.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/pci/als4000.c b/sound/pci/als4000.c
index d496cc5..48b5175 100644
--- a/sound/pci/als4000.c
+++ b/sound/pci/als4000.c
@@ -6,6 +6,21 @@
*
* Framework borrowed from Massimo Piccioni's card-als100.c.
*
+ *
+ * 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
+ *
* NOTES
*
* Since Avance does not provide any meaningful documentation, and I
@@ -43,19 +58,9 @@
* Set KSound:
* - value -> some port 0x0c0d
*
- * 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
+ * ToDo:
+ * - Proper shared IRQ handling?
+ * - power management? (card can do voice wakeup according to datasheet!!)
*/
#include <sound/driver.h>
@@ -101,8 +106,9 @@
#endif
typedef struct {
- struct pci_dev *pci;
+ /* most frequent access first */
unsigned long gcr;
+ struct pci_dev *pci;
#ifdef SUPPORT_JOYSTICK
struct gameport *gameport;
#endif
@@ -146,13 +152,13 @@
}
}
-static void snd_als4000_set_capture_dma(sb_t *chip, dma_addr_t addr, unsigned size)
+static inline void snd_als4000_set_capture_dma(sb_t *chip, dma_addr_t addr, unsigned size)
{
snd_als4000_gcr_write(chip, 0xa2, addr);
snd_als4000_gcr_write(chip, 0xa3, (size-1));
}
-static void snd_als4000_set_playback_dma(sb_t *chip, dma_addr_t addr, unsigned size)
+static inline void snd_als4000_set_playback_dma(sb_t *chip, dma_addr_t addr, unsigned size)
{
snd_als4000_gcr_write(chip, 0x91, addr);
snd_als4000_gcr_write(chip, 0x92, (size-1)|0x180000);
@@ -177,7 +183,7 @@
}
/* structure for setting up playback */
-static struct {
+static const struct {
unsigned char dsp_cmd, dma_on, dma_off, format;
} playback_cmd_vals[]={
/* ALS4000_FORMAT_U8_MONO */
@@ -201,7 +207,7 @@
/* structure for setting up capture */
enum { CMD_WIDTH8=0x04, CMD_SIGNED=0x10, CMD_MONO=0x80, CMD_STEREO=0xA0 };
-static unsigned char capture_cmd_vals[]=
+static const unsigned char capture_cmd_vals[]=
{
CMD_WIDTH8|CMD_MONO, /* ALS4000_FORMAT_U8_MONO */
CMD_WIDTH8|CMD_SIGNED|CMD_MONO, /* ALS4000_FORMAT_S8_MONO */
@@ -228,9 +234,9 @@
static int snd_als4000_capture_prepare(snd_pcm_substream_t * substream)
{
- unsigned long flags;
sb_t *chip = snd_pcm_substream_chip(substream);
snd_pcm_runtime_t *runtime = substream->runtime;
+ unsigned long flags;
unsigned long size;
unsigned count;
@@ -256,9 +262,9 @@
static int snd_als4000_playback_prepare(snd_pcm_substream_t *substream)
{
- unsigned long flags;
sb_t *chip = snd_pcm_substream_chip(substream);
snd_pcm_runtime_t *runtime = substream->runtime;
+ unsigned long flags;
unsigned long size;
unsigned count;
@@ -353,6 +359,18 @@
return bytes_to_frames( substream->runtime, result );
}
+/* FIXME: this IRQ routine doesn't really support IRQ sharing (we always
+ * return IRQ_HANDLED no matter whether we actually had an IRQ flag or not).
+ * ALS4000a.PDF writes that while ACKing IRQ in PCI block will *not* ACK
+ * the IRQ in the SB core, ACKing IRQ in SB block *will* ACK the PCI IRQ
+ * register (alt_port + 0x0e). Probably something could be optimized here to
+ * query/write one register only...
+ * And even if both registers need to be queried, then there's still the
+ * question of whether it's actually correct to ACK PCI IRQ before reading
+ * SB IRQ like we do now, since ALS4000a.PDF mentions that PCI IRQ will *clear*
+ * SB IRQ status.
+ * And do we *really* need the lock here for *reading* SB_DSP4_IRQSTATUS??
+ * */
static irqreturn_t snd_als4000_interrupt(int irq, void *dev_id, struct pt_regs *regs)
{
sb_t *chip = dev_id;
@@ -698,8 +716,7 @@
-1,
SB_HW_ALS4000,
&chip)) < 0) {
- snd_card_free(card);
- return err;
+ goto out_err;
}
chip->pci = pci;
@@ -716,40 +733,42 @@
if ((err = snd_mpu401_uart_new( card, 0, MPU401_HW_ALS4000,
gcr+0x30, 1, pci->irq, 0,
&chip->rmidi)) < 0) {
- snd_card_free(card);
- printk(KERN_ERR "als4000: no MPU-401device at 0x%lx ?\n", gcr+0x30);
- return err;
+ printk(KERN_ERR "als4000: no MPU-401 device at 0x%lx?\n", gcr+0x30);
+ goto out_err;
}
if ((err = snd_als4000_pcm(chip, 0)) < 0) {
- snd_card_free(card);
- return err;
+ goto out_err;
}
if ((err = snd_sbmixer_new(chip)) < 0) {
- snd_card_free(card);
- return err;
+ goto out_err;
}
if (snd_opl3_create(card, gcr+0x10, gcr+0x12,
OPL3_HW_AUTO, 1, &opl3) < 0) {
- printk(KERN_ERR "als4000: no OPL device at 0x%lx-0x%lx ?\n",
+ printk(KERN_ERR "als4000: no OPL device at 0x%lx-0x%lx?\n",
gcr+0x10, gcr+0x12 );
} else {
if ((err = snd_opl3_hwdep_new(opl3, 0, 1, NULL)) < 0) {
- snd_card_free(card);
- return err;
+ goto out_err;
}
}
snd_als4000_create_gameport(acard, dev);
if ((err = snd_card_register(card)) < 0) {
- snd_card_free(card);
- return err;
+ goto out_err;
}
pci_set_drvdata(pci, card);
dev++;
- return 0;
+ err = 0;
+ goto out;
+
+out_err:
+ snd_card_free(card);
+
+out:
+ return err;
}
static void __devexit snd_card_als4000_remove(struct pci_dev *pci)