/*
- * Copyright (c) by Jaroslav Kysela <perex@suse.cz>
+ * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
* Routines for control of AD1848/AD1847/CS4248
*
*
*/
#define SNDRV_MAIN_OBJECT_FILE
-#include <sound/driver.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <asm/io.h>
#include <asm/dma.h>
-MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
+MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
MODULE_DESCRIPTION("Routines for control of AD1848/AD1847/CS4248");
MODULE_LICENSE("GPL");
};
static struct snd_pcm_hw_constraint_list hw_constraints_rates = {
- .count = 14,
+ .count = ARRAY_SIZE(rates),
.list = rates,
.mask = 0,
};
* Basic I/O functions
*/
-void snd_ad1848_out(struct snd_ad1848 *chip,
- unsigned char reg,
- unsigned char value)
+static void snd_ad1848_wait(struct snd_ad1848 *chip)
{
int timeout;
- for (timeout = 250; timeout > 0 && (inb(AD1848P(chip, REGSEL)) & AD1848_INIT); timeout--)
+ for (timeout = 250; timeout > 0; timeout--) {
+ if ((inb(AD1848P(chip, REGSEL)) & AD1848_INIT) == 0)
+ break;
udelay(100);
+ }
+}
+
+void snd_ad1848_out(struct snd_ad1848 *chip,
+ unsigned char reg,
+ unsigned char value)
+{
+ snd_ad1848_wait(chip);
#ifdef CONFIG_SND_DEBUG
if (inb(AD1848P(chip, REGSEL)) & AD1848_INIT)
- snd_printk(KERN_WARNING "auto calibration time out - reg = 0x%x, value = 0x%x\n", reg, value);
+ snd_printk(KERN_WARNING "auto calibration time out - "
+ "reg = 0x%x, value = 0x%x\n", reg, value);
#endif
outb(chip->mce_bit | reg, AD1848P(chip, REGSEL));
outb(chip->image[reg] = value, AD1848P(chip, REG));
mb();
-#if 0
- printk("codec out - reg 0x%x = 0x%x\n", chip->mce_bit | reg, value);
-#endif
+ snd_printdd("codec out - reg 0x%x = 0x%x\n",
+ chip->mce_bit | reg, value);
}
EXPORT_SYMBOL(snd_ad1848_out);
static void snd_ad1848_dout(struct snd_ad1848 *chip,
unsigned char reg, unsigned char value)
{
- int timeout;
-
- for (timeout = 250; timeout > 0 && (inb(AD1848P(chip, REGSEL)) & AD1848_INIT); timeout--)
- udelay(100);
+ snd_ad1848_wait(chip);
outb(chip->mce_bit | reg, AD1848P(chip, REGSEL));
outb(value, AD1848P(chip, REG));
mb();
static unsigned char snd_ad1848_in(struct snd_ad1848 *chip, unsigned char reg)
{
- int timeout;
-
- for (timeout = 250; timeout > 0 && (inb(AD1848P(chip, REGSEL)) & AD1848_INIT); timeout--)
- udelay(100);
+ snd_ad1848_wait(chip);
#ifdef CONFIG_SND_DEBUG
if (inb(AD1848P(chip, REGSEL)) & AD1848_INIT)
- snd_printk(KERN_WARNING "auto calibration time out - reg = 0x%x\n", reg);
+ snd_printk(KERN_WARNING "auto calibration time out - "
+ "reg = 0x%x\n", reg);
#endif
outb(chip->mce_bit | reg, AD1848P(chip, REGSEL));
mb();
unsigned long flags;
int timeout;
- for (timeout = 250; timeout > 0 && (inb(AD1848P(chip, REGSEL)) & AD1848_INIT); timeout--)
- udelay(100);
+ snd_ad1848_wait(chip);
#ifdef CONFIG_SND_DEBUG
if (inb(AD1848P(chip, REGSEL)) & AD1848_INIT)
snd_printk(KERN_WARNING "mce_up - auto calibration time out (0)\n");
static void snd_ad1848_mce_down(struct snd_ad1848 *chip)
{
- unsigned long flags;
- int timeout;
- signed long time;
+ unsigned long flags, timeout;
+ int reg;
spin_lock_irqsave(&chip->reg_lock, flags);
for (timeout = 5; timeout > 0; timeout--)
/* end of cleanup sequence */
for (timeout = 12000; timeout > 0 && (inb(AD1848P(chip, REGSEL)) & AD1848_INIT); timeout--)
udelay(100);
-#if 0
- printk("(1) timeout = %i\n", timeout);
-#endif
+
+ snd_printdd("(1) timeout = %ld\n", timeout);
+
#ifdef CONFIG_SND_DEBUG
if (inb(AD1848P(chip, REGSEL)) & AD1848_INIT)
snd_printk(KERN_WARNING "mce_down [0x%lx] - auto calibration time out (0)\n", AD1848P(chip, REGSEL));
#endif
+
chip->mce_bit &= ~AD1848_MCE;
- timeout = inb(AD1848P(chip, REGSEL));
- outb(chip->mce_bit | (timeout & 0x1f), AD1848P(chip, REGSEL));
- if (timeout == 0x80)
+ reg = inb(AD1848P(chip, REGSEL));
+ outb(chip->mce_bit | (reg & 0x1f), AD1848P(chip, REGSEL));
+ if (reg == 0x80)
snd_printk(KERN_WARNING "mce_down [0x%lx]: serious init problem - codec still busy\n", chip->port);
- if ((timeout & AD1848_MCE) == 0) {
+ if ((reg & AD1848_MCE) == 0) {
spin_unlock_irqrestore(&chip->reg_lock, flags);
return;
}
- /* calibration process */
- for (timeout = 500; timeout > 0 && (snd_ad1848_in(chip, AD1848_TEST_INIT) & AD1848_CALIB_IN_PROGRESS) == 0; timeout--);
- if ((snd_ad1848_in(chip, AD1848_TEST_INIT) & AD1848_CALIB_IN_PROGRESS) == 0) {
- snd_printd("mce_down - auto calibration time out (1)\n");
- spin_unlock_irqrestore(&chip->reg_lock, flags);
- return;
- }
-#if 0
- printk("(2) timeout = %i, jiffies = %li\n", timeout, jiffies);
-#endif
- time = HZ / 4;
- while (snd_ad1848_in(chip, AD1848_TEST_INIT) & AD1848_CALIB_IN_PROGRESS) {
+ /*
+ * Wait for auto-calibration (AC) process to finish, i.e. ACI to go low.
+ * It may take up to 5 sample periods (at most 907 us @ 5.5125 kHz) for
+ * the process to _start_, so it is important to wait at least that long
+ * before checking. Otherwise we might think AC has finished when it
+ * has in fact not begun. It could take 128 (no AC) or 384 (AC) cycles
+ * for ACI to drop. This gives a wait of at most 70 ms with a more
+ * typical value of 3-9 ms.
+ */
+ timeout = jiffies + msecs_to_jiffies(250);
+ do {
spin_unlock_irqrestore(&chip->reg_lock, flags);
- if (time <= 0) {
- snd_printk(KERN_ERR "mce_down - auto calibration time out (2)\n");
- return;
- }
- time = schedule_timeout_interruptible(time);
+ msleep(1);
spin_lock_irqsave(&chip->reg_lock, flags);
- }
-#if 0
- printk("(3) jiffies = %li\n", jiffies);
-#endif
- time = HZ / 10;
- while (inb(AD1848P(chip, REGSEL)) & AD1848_INIT) {
- spin_unlock_irqrestore(&chip->reg_lock, flags);
- if (time <= 0) {
- snd_printk(KERN_ERR "mce_down - auto calibration time out (3)\n");
- return;
- }
- time = schedule_timeout_interruptible(time);
- spin_lock_irqsave(&chip->reg_lock, flags);
- }
+ reg = snd_ad1848_in(chip, AD1848_TEST_INIT) &
+ AD1848_CALIB_IN_PROGRESS;
+ } while (reg && time_before(jiffies, timeout));
spin_unlock_irqrestore(&chip->reg_lock, flags);
-#if 0
- printk("(4) jiffies = %li\n", jiffies);
- snd_printk("mce_down - exit = 0x%x\n", inb(AD1848P(chip, REGSEL)));
-#endif
+ if (reg)
+ snd_printk(KERN_ERR
+ "mce_down - auto calibration time out (2)\n");
+
+ snd_printdd("(4) jiffies = %lu\n", jiffies);
+ snd_printd("mce_down - exit = 0x%x\n", inb(AD1848P(chip, REGSEL)));
}
static unsigned int snd_ad1848_get_count(unsigned char format,
{
int i;
- for (i = 0; i < 14; i++)
+ for (i = 0; i < ARRAY_SIZE(rates); i++)
if (rate == rates[i])
return freq_bits[i];
snd_BUG();
- return freq_bits[13];
+ return freq_bits[ARRAY_SIZE(rates) - 1];
}
static int snd_ad1848_ioctl(struct snd_pcm_substream *substream,
{
unsigned long flags;
- mutex_lock(&chip->open_mutex);
- if (chip->mode & AD1848_MODE_OPEN) {
- mutex_unlock(&chip->open_mutex);
+ if (chip->mode & AD1848_MODE_OPEN)
return -EAGAIN;
- }
+
snd_ad1848_mce_down(chip);
#ifdef SNDRV_DEBUG_MCE
spin_unlock_irqrestore(&chip->reg_lock, flags);
chip->mode = mode;
- mutex_unlock(&chip->open_mutex);
return 0;
}
{
unsigned long flags;
- mutex_lock(&chip->open_mutex);
- if (!chip->mode) {
- mutex_unlock(&chip->open_mutex);
+ if (!chip->mode)
return;
- }
/* disable IRQ */
spin_lock_irqsave(&chip->reg_lock, flags);
outb(0, AD1848P(chip, STATUS)); /* clear IRQ */
spin_unlock_irqrestore(&chip->reg_lock, flags);
chip->mode = 0;
- mutex_unlock(&chip->open_mutex);
}
/*
if (chip == NULL)
return -ENOMEM;
spin_lock_init(&chip->reg_lock);
- mutex_init(&chip->open_mutex);
chip->card = card;
chip->port = port;
chip->irq = -1;
git.openpandora.org / pandora-kernel.git / blobdiff