From: Krzysztof Helt krzysztof.h1@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@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