[alsa-devel] [PATCH] sun-cs4231: code improvements (2nd version)
Krzysztof Helt
krzysztof.h1 at wp.pl
Mon Sep 3 18:41:44 CEST 2007
From: Krzysztof Helt <krzysztof.h1 at wp.pl>
This patch does some code improvements to make
driver (both code and binary) shorter.
It also make use of card->private_data pointer to
store chip information.
Signed-off-by: Krzysztof Helt <krzysztof.h1 at wp.pl>
---
Do I understand correctly, that lines:
if ((err = function()) < 0)
are passe now?
They are so abudant in the alsa code, that I thought it is some kind of template code.
I can clean up drivers according to the checkpatch.pl script if it helps (above problem, long lines, etc).
diff -urp linux-2.6.23.old/sound/sparc/cs4231.c linux-2.6.23/sound/sparc/cs4231.c
--- linux-2.6.23.old/sound/sparc/cs4231.c 2007-09-02 14:02:32.000000000 +0200
+++ linux-2.6.23/sound/sparc/cs4231.c 2007-09-03 15:56:03.000000000 +0200
@@ -30,17 +30,11 @@
#ifdef CONFIG_SBUS
#define SBUS_SUPPORT
-#endif
-
-#ifdef SBUS_SUPPORT
#include <asm/sbus.h>
#endif
#if defined(CONFIG_PCI) && defined(CONFIG_SPARC64)
#define EBUS_SUPPORT
-#endif
-
-#ifdef EBUS_SUPPORT
#include <linux/pci.h>
#include <asm/ebus.h>
#endif
@@ -339,7 +333,7 @@ static unsigned int rates[14] = {
};
static struct snd_pcm_hw_constraint_list hw_constraints_rates = {
- .count = 14,
+ .count = ARRAY_SIZE(rates),
.list = rates,
};
@@ -389,116 +383,85 @@ static unsigned char snd_cs4231_original
static u8 __cs4231_readb(struct snd_cs4231 *cp, void __iomem *reg_addr)
{
#ifdef EBUS_SUPPORT
- if (cp->flags & CS4231_FLAG_EBUS) {
+ if (cp->flags & CS4231_FLAG_EBUS)
return readb(reg_addr);
- } else {
+ else
#endif
#ifdef SBUS_SUPPORT
return sbus_readb(reg_addr);
#endif
-#ifdef EBUS_SUPPORT
- }
-#endif
}
static void __cs4231_writeb(struct snd_cs4231 *cp, u8 val, void __iomem *reg_addr)
{
#ifdef EBUS_SUPPORT
- if (cp->flags & CS4231_FLAG_EBUS) {
+ if (cp->flags & CS4231_FLAG_EBUS)
return writeb(val, reg_addr);
- } else {
+ else
#endif
#ifdef SBUS_SUPPORT
return sbus_writeb(val, reg_addr);
#endif
-#ifdef EBUS_SUPPORT
- }
-#endif
}
/*
* Basic I/O functions
*/
-static void snd_cs4231_outm(struct snd_cs4231 *chip, unsigned char reg,
- unsigned char mask, unsigned char value)
+static void snd_cs4231_ready(struct snd_cs4231 *chip)
{
int timeout;
- unsigned char tmp;
for (timeout = 250;
timeout > 0 && (__cs4231_readb(chip, CS4231P(chip, REGSEL)) & CS4231_INIT);
timeout--)
udelay(100);
-#ifdef CONFIG_SND_DEBUG
- if (__cs4231_readb(chip, CS4231P(chip, REGSEL)) & CS4231_INIT)
- snd_printdd("outm: auto calibration time out - reg = 0x%x, value = 0x%x\n", reg, value);
-#endif
- if (chip->calibrate_mute) {
- chip->image[reg] &= mask;
- chip->image[reg] |= value;
- } else {
- __cs4231_writeb(chip, chip->mce_bit | reg, CS4231P(chip, REGSEL));
- mb();
- tmp = (chip->image[reg] & mask) | value;
- __cs4231_writeb(chip, tmp, CS4231P(chip, REG));
- chip->image[reg] = tmp;
- mb();
- }
}
static void snd_cs4231_dout(struct snd_cs4231 *chip, unsigned char reg, unsigned char value)
{
- int timeout;
-
- for (timeout = 250;
- timeout > 0 && (__cs4231_readb(chip, CS4231P(chip, REGSEL)) & CS4231_INIT);
- timeout--)
- udelay(100);
+ snd_cs4231_ready(chip);
#ifdef CONFIG_SND_DEBUG
if (__cs4231_readb(chip, CS4231P(chip, REGSEL)) & CS4231_INIT)
- snd_printdd("out: auto calibration time out - reg = 0x%x, value = 0x%x\n", reg, value);
+ snd_printdd("out: auto calibration time out - reg = 0x%x, "
+ "value = 0x%x\n",
+ reg, value);
#endif
__cs4231_writeb(chip, chip->mce_bit | reg, CS4231P(chip, REGSEL));
+ wmb();
__cs4231_writeb(chip, value, CS4231P(chip, REG));
mb();
}
-static void snd_cs4231_out(struct snd_cs4231 *chip, unsigned char reg, unsigned char value)
+static inline void snd_cs4231_outm(struct snd_cs4231 *chip, unsigned char reg,
+ unsigned char mask, unsigned char value)
{
- int timeout;
+ unsigned char tmp = (chip->image[reg] & mask) | value;
- for (timeout = 250;
- timeout > 0 && (__cs4231_readb(chip, CS4231P(chip, REGSEL)) & CS4231_INIT);
- timeout--)
- udelay(100);
-#ifdef CONFIG_SND_DEBUG
- if (__cs4231_readb(chip, CS4231P(chip, REGSEL)) & CS4231_INIT)
- snd_printdd("out: auto calibration time out - reg = 0x%x, value = 0x%x\n", reg, value);
-#endif
- __cs4231_writeb(chip, chip->mce_bit | reg, CS4231P(chip, REGSEL));
- __cs4231_writeb(chip, value, CS4231P(chip, REG));
+ chip->image[reg] = tmp;
+ if (!chip->calibrate_mute)
+ snd_cs4231_dout(chip, reg, tmp);
+}
+
+static void snd_cs4231_out(struct snd_cs4231 *chip, unsigned char reg,
+ unsigned char value)
+{
+ snd_cs4231_dout(chip, reg, value);
chip->image[reg] = value;
mb();
}
static unsigned char snd_cs4231_in(struct snd_cs4231 *chip, unsigned char reg)
{
- int timeout;
- unsigned char ret;
-
- for (timeout = 250;
- timeout > 0 && (__cs4231_readb(chip, CS4231P(chip, REGSEL)) & CS4231_INIT);
- timeout--)
- udelay(100);
+ snd_cs4231_ready(chip);
#ifdef CONFIG_SND_DEBUG
if (__cs4231_readb(chip, CS4231P(chip, REGSEL)) & CS4231_INIT)
- snd_printdd("in: auto calibration time out - reg = 0x%x\n", reg);
+ snd_printdd("in: auto calibration time out - reg = 0x%x\n",
+ reg);
#endif
__cs4231_writeb(chip, chip->mce_bit | reg, CS4231P(chip, REGSEL));
mb();
- ret = __cs4231_readb(chip, CS4231P(chip, REG));
- return ret;
+ return __cs4231_readb(chip, CS4231P(chip, REG));
}
/*
@@ -517,7 +480,7 @@ static void snd_cs4231_busy_wait(struct
for (timeout = 500;
timeout > 0 && (__cs4231_readb(chip, CS4231P(chip, REGSEL)) & CS4231_INIT);
timeout--)
- udelay(1000);
+ msleep(1);
}
static void snd_cs4231_mce_up(struct snd_cs4231 *chip)
@@ -526,8 +489,7 @@ static void snd_cs4231_mce_up(struct snd
int timeout;
spin_lock_irqsave(&chip->lock, flags);
- for (timeout = 250; timeout > 0 && (__cs4231_readb(chip, CS4231P(chip, REGSEL)) & CS4231_INIT); timeout--)
- udelay(100);
+ snd_cs4231_ready(chip);
#ifdef CONFIG_SND_DEBUG
if (__cs4231_readb(chip, CS4231P(chip, REGSEL)) & CS4231_INIT)
snd_printdd("mce_up - auto calibration time out (0)\n");
@@ -565,8 +527,8 @@ static void snd_cs4231_mce_down(struct s
/* calibration process */
- for (timeout = 500; timeout > 0 && (snd_cs4231_in(chip, CS4231_TEST_INIT) & CS4231_CALIB_IN_PROGRESS) == 0; timeout--)
- udelay(100);
+ snd_cs4231_ready(chip);
+ snd_cs4231_ready(chip);
if ((snd_cs4231_in(chip, CS4231_TEST_INIT) & CS4231_CALIB_IN_PROGRESS) == 0) {
snd_printd("cs4231_mce_down - auto calibration time out (1)\n");
spin_unlock_irqrestore(&chip->lock, flags);
@@ -1058,11 +1020,6 @@ static int snd_cs4231_playback_hw_params
return 0;
}
-static int snd_cs4231_playback_hw_free(struct snd_pcm_substream *substream)
-{
- return snd_pcm_lib_free_pages(substream);
-}
-
static int snd_cs4231_playback_prepare(struct snd_pcm_substream *substream)
{
struct snd_cs4231 *chip = snd_pcm_substream_chip(substream);
@@ -1100,11 +1057,6 @@ static int snd_cs4231_capture_hw_params(
return 0;
}
-static int snd_cs4231_capture_hw_free(struct snd_pcm_substream *substream)
-{
- return snd_pcm_lib_free_pages(substream);
-}
-
static int snd_cs4231_capture_prepare(struct snd_pcm_substream *substream)
{
struct snd_cs4231 *chip = snd_pcm_substream_chip(substream);
@@ -1182,10 +1134,6 @@ static snd_pcm_uframes_t snd_cs4231_capt
return bytes_to_frames(substream->runtime, ptr);
}
-/*
-
- */
-
static int __init snd_cs4231_probe(struct snd_cs4231 *chip)
{
unsigned long flags;
@@ -1356,7 +1304,7 @@ static struct snd_pcm_ops snd_cs4231_pla
.close = snd_cs4231_playback_close,
.ioctl = snd_pcm_lib_ioctl,
.hw_params = snd_cs4231_playback_hw_params,
- .hw_free = snd_cs4231_playback_hw_free,
+ .hw_free = snd_pcm_lib_free_pages,
.prepare = snd_cs4231_playback_prepare,
.trigger = snd_cs4231_trigger,
.pointer = snd_cs4231_playback_pointer,
@@ -1367,18 +1315,20 @@ static struct snd_pcm_ops snd_cs4231_cap
.close = snd_cs4231_capture_close,
.ioctl = snd_pcm_lib_ioctl,
.hw_params = snd_cs4231_capture_hw_params,
- .hw_free = snd_cs4231_capture_hw_free,
+ .hw_free = snd_pcm_lib_free_pages,
.prepare = snd_cs4231_capture_prepare,
.trigger = snd_cs4231_trigger,
.pointer = snd_cs4231_capture_pointer,
};
-static int __init snd_cs4231_pcm(struct snd_cs4231 *chip)
+static int __init snd_cs4231_pcm(struct snd_card *card)
{
+ struct snd_cs4231 *chip = card->private_data;
struct snd_pcm *pcm;
int err;
- if ((err = snd_pcm_new(chip->card, "CS4231", 0, 1, 1, &pcm)) < 0)
+ err = snd_pcm_new(card, "CS4231", 0, 1, 1, &pcm);
+ if (err < 0)
return err;
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_cs4231_playback_ops);
@@ -1396,8 +1346,9 @@ static int __init snd_cs4231_pcm(struct
return 0;
}
-static int __init snd_cs4231_timer(struct snd_cs4231 *chip)
+static int __init snd_cs4231_timer(struct snd_card *card)
{
+ struct snd_cs4231 *chip = card->private_data;
struct snd_timer *timer;
struct snd_timer_id tid;
int err;
@@ -1405,10 +1356,11 @@ static int __init snd_cs4231_timer(struc
/* Timer initialization */
tid.dev_class = SNDRV_TIMER_CLASS_CARD;
tid.dev_sclass = SNDRV_TIMER_SCLASS_NONE;
- tid.card = chip->card->number;
+ tid.card = card->number;
tid.device = 0;
tid.subdevice = 0;
- if ((err = snd_timer_new(chip->card, "CS4231", &tid, &timer)) < 0)
+ err = snd_timer_new(card, "CS4231", &tid, &timer);
+ if (err < 0)
return err;
strcpy(timer->name, "CS4231");
timer->private_data = chip;
@@ -1428,9 +1380,7 @@ static int snd_cs4231_info_mux(struct sn
static char *texts[4] = {
"Line", "CD", "Mic", "Mix"
};
- struct snd_cs4231 *chip = snd_kcontrol_chip(kcontrol);
- snd_assert(chip->card != NULL, return -EINVAL);
uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
uinfo->count = 2;
uinfo->value.enumerated.items = 4;
@@ -1670,21 +1620,19 @@ CS4231_SINGLE("Line Out Switch", 0, CS42
CS4231_SINGLE("Headphone Out Switch", 0, CS4231_PIN_CTRL, 7, 1, 1)
};
-static int __init snd_cs4231_mixer(struct snd_cs4231 *chip)
+static int __init snd_cs4231_mixer(struct snd_card *card)
{
- struct snd_card *card;
+ struct snd_cs4231 *chip = card->private_data;
int err, idx;
snd_assert(chip != NULL && chip->pcm != NULL, return -EINVAL);
- card = chip->card;
-
strcpy(card->mixername, chip->pcm->name);
for (idx = 0; idx < ARRAY_SIZE(snd_cs4231_controls); idx++) {
- if ((err = snd_ctl_add(card,
- snd_ctl_new1(&snd_cs4231_controls[idx],
- chip))) < 0)
+ err = snd_ctl_add(card,
+ snd_ctl_new1(&snd_cs4231_controls[idx], chip));
+ if (err < 0)
return err;
}
return 0;
@@ -1695,6 +1643,7 @@ static int dev;
static int __init cs4231_attach_begin(struct snd_card **rcard)
{
struct snd_card *card;
+ struct snd_cs4231 *chip;
*rcard = NULL;
@@ -1706,31 +1655,40 @@ static int __init cs4231_attach_begin(st
return -ENOENT;
}
- card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0);
+ card = snd_card_new(index[dev], id[dev], THIS_MODULE,
+ sizeof(struct snd_cs4231));
if (card == NULL)
return -ENOMEM;
strcpy(card->driver, "CS4231");
strcpy(card->shortname, "Sun CS4231");
+ chip = card->private_data;
+ chip->card = card;
+
*rcard = card;
return 0;
}
-static int __init cs4231_attach_finish(struct snd_card *card, struct snd_cs4231 *chip)
+static int __init cs4231_attach_finish(struct snd_card *card)
{
+ struct snd_cs4231 *chip = card->private_data;
int err;
- if ((err = snd_cs4231_pcm(chip)) < 0)
+ err = snd_cs4231_pcm(card);
+ if (err < 0)
goto out_err;
- if ((err = snd_cs4231_mixer(chip)) < 0)
+ err = snd_cs4231_mixer(card);
+ if (err < 0)
goto out_err;
- if ((err = snd_cs4231_timer(chip)) < 0)
+ err = snd_cs4231_timer(card);
+ if (err < 0)
goto out_err;
- if ((err = snd_card_register(card)) < 0)
+ err = snd_card_register(card);
+ if (err < 0)
goto out_err;
chip->next = cs4231_list;
@@ -1925,23 +1883,16 @@ static struct snd_device_ops snd_cs4231_
static int __init snd_cs4231_sbus_create(struct snd_card *card,
struct sbus_dev *sdev,
- int dev,
- struct snd_cs4231 **rchip)
+ int dev)
{
- struct snd_cs4231 *chip;
+ struct snd_cs4231 *chip = card->private_data;
int err;
- *rchip = NULL;
- chip = kzalloc(sizeof(*chip), GFP_KERNEL);
- if (chip == NULL)
- return -ENOMEM;
-
spin_lock_init(&chip->lock);
spin_lock_init(&chip->c_dma.sbus_info.lock);
spin_lock_init(&chip->p_dma.sbus_info.lock);
mutex_init(&chip->mce_mutex);
mutex_init(&chip->open_mutex);
- chip->card = card;
chip->dev_u.sdev = sdev;
chip->regs_size = sdev->reg_addrs[0].reg_size;
memcpy(&chip->image, &snd_cs4231_original_image,
@@ -1992,14 +1943,12 @@ static int __init snd_cs4231_sbus_create
return err;
}
- *rchip = chip;
return 0;
}
static int __init cs4231_sbus_attach(struct sbus_dev *sdev)
{
struct resource *rp = &sdev->resource[0];
- struct snd_cs4231 *cp;
struct snd_card *card;
int err;
@@ -2013,12 +1962,13 @@ static int __init cs4231_sbus_attach(str
(unsigned long long)rp->start,
sdev->irqs[0]);
- if ((err = snd_cs4231_sbus_create(card, sdev, dev, &cp)) < 0) {
+ err = snd_cs4231_sbus_create(card, sdev, dev);
+ if (err < 0) {
snd_card_free(card);
return err;
}
- return cs4231_attach_finish(card, cp);
+ return cs4231_attach_finish(card);
}
#endif
@@ -2105,24 +2055,17 @@ static struct snd_device_ops snd_cs4231_
static int __init snd_cs4231_ebus_create(struct snd_card *card,
struct linux_ebus_device *edev,
- int dev,
- struct snd_cs4231 **rchip)
+ int dev)
{
- struct snd_cs4231 *chip;
+ struct snd_cs4231 *chip = card->private_data;
int err;
- *rchip = NULL;
- chip = kzalloc(sizeof(*chip), GFP_KERNEL);
- if (chip == NULL)
- return -ENOMEM;
-
spin_lock_init(&chip->lock);
spin_lock_init(&chip->c_dma.ebus_info.lock);
spin_lock_init(&chip->p_dma.ebus_info.lock);
mutex_init(&chip->mce_mutex);
mutex_init(&chip->open_mutex);
chip->flags |= CS4231_FLAG_EBUS;
- chip->card = card;
chip->dev_u.pdev = edev->bus->self;
memcpy(&chip->image, &snd_cs4231_original_image,
sizeof(snd_cs4231_original_image));
@@ -2192,14 +2135,12 @@ static int __init snd_cs4231_ebus_create
return err;
}
- *rchip = chip;
return 0;
}
static int __init cs4231_ebus_attach(struct linux_ebus_device *edev)
{
struct snd_card *card;
- struct snd_cs4231 *chip;
int err;
err = cs4231_attach_begin(&card);
@@ -2211,12 +2152,13 @@ static int __init cs4231_ebus_attach(str
edev->resource[0].start,
edev->irqs[0]);
- if ((err = snd_cs4231_ebus_create(card, edev, dev, &chip)) < 0) {
+ err = snd_cs4231_ebus_create(card, edev, dev);
+ if (err < 0) {
snd_card_free(card);
return err;
}
- return cs4231_attach_finish(card, chip);
+ return cs4231_attach_finish(card);
}
#endif
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