diff options
Diffstat (limited to 'kernel/sound/pci/ice1712/ak4xxx.c')
| -rw-r--r-- | kernel/sound/pci/ice1712/ak4xxx.c | 196 |
1 files changed, 196 insertions, 0 deletions
diff --git a/kernel/sound/pci/ice1712/ak4xxx.c b/kernel/sound/pci/ice1712/ak4xxx.c new file mode 100644 index 000000000..179ef7a5f --- /dev/null +++ b/kernel/sound/pci/ice1712/ak4xxx.c @@ -0,0 +1,196 @@ +/* + * ALSA driver for ICEnsemble ICE1712 (Envy24) + * + * AK4524 / AK4528 / AK4529 / AK4355 / AK4381 interface + * + * Copyright (c) 2000 Jaroslav Kysela <perex@perex.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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + */ + +#include <linux/io.h> +#include <linux/delay.h> +#include <linux/interrupt.h> +#include <linux/slab.h> +#include <linux/init.h> +#include <linux/module.h> +#include <sound/core.h> +#include <sound/initval.h> +#include "ice1712.h" + +MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>"); +MODULE_DESCRIPTION("ICEnsemble ICE17xx <-> AK4xxx AD/DA chip interface"); +MODULE_LICENSE("GPL"); + +static void snd_ice1712_akm4xxx_lock(struct snd_akm4xxx *ak, int chip) +{ + struct snd_ice1712 *ice = ak->private_data[0]; + + snd_ice1712_save_gpio_status(ice); +} + +static void snd_ice1712_akm4xxx_unlock(struct snd_akm4xxx *ak, int chip) +{ + struct snd_ice1712 *ice = ak->private_data[0]; + + snd_ice1712_restore_gpio_status(ice); +} + +/* + * write AK4xxx register + */ +static void snd_ice1712_akm4xxx_write(struct snd_akm4xxx *ak, int chip, + unsigned char addr, unsigned char data) +{ + unsigned int tmp; + int idx; + unsigned int addrdata; + struct snd_ak4xxx_private *priv = (void *)ak->private_value[0]; + struct snd_ice1712 *ice = ak->private_data[0]; + + if (snd_BUG_ON(chip < 0 || chip >= 4)) + return; + + tmp = snd_ice1712_gpio_read(ice); + tmp |= priv->add_flags; + tmp &= ~priv->mask_flags; + if (priv->cs_mask == priv->cs_addr) { + if (priv->cif) { + tmp |= priv->cs_mask; /* start without chip select */ + } else { + tmp &= ~priv->cs_mask; /* chip select low */ + snd_ice1712_gpio_write(ice, tmp); + udelay(1); + } + } else { + /* doesn't handle cf=1 yet */ + tmp &= ~priv->cs_mask; + tmp |= priv->cs_addr; + snd_ice1712_gpio_write(ice, tmp); + udelay(1); + } + + /* build I2C address + data byte */ + addrdata = (priv->caddr << 6) | 0x20 | (addr & 0x1f); + addrdata = (addrdata << 8) | data; + for (idx = 15; idx >= 0; idx--) { + /* drop clock */ + tmp &= ~priv->clk_mask; + snd_ice1712_gpio_write(ice, tmp); + udelay(1); + /* set data */ + if (addrdata & (1 << idx)) + tmp |= priv->data_mask; + else + tmp &= ~priv->data_mask; + snd_ice1712_gpio_write(ice, tmp); + udelay(1); + /* raise clock */ + tmp |= priv->clk_mask; + snd_ice1712_gpio_write(ice, tmp); + udelay(1); + } + + if (priv->cs_mask == priv->cs_addr) { + if (priv->cif) { + /* assert a cs pulse to trigger */ + tmp &= ~priv->cs_mask; + snd_ice1712_gpio_write(ice, tmp); + udelay(1); + } + tmp |= priv->cs_mask; /* chip select high to trigger */ + } else { + tmp &= ~priv->cs_mask; + tmp |= priv->cs_none; /* deselect address */ + } + snd_ice1712_gpio_write(ice, tmp); + udelay(1); +} + +/* + * initialize the struct snd_akm4xxx record with the template + */ +int snd_ice1712_akm4xxx_init(struct snd_akm4xxx *ak, const struct snd_akm4xxx *temp, + const struct snd_ak4xxx_private *_priv, struct snd_ice1712 *ice) +{ + struct snd_ak4xxx_private *priv; + + if (_priv != NULL) { + priv = kmalloc(sizeof(*priv), GFP_KERNEL); + if (priv == NULL) + return -ENOMEM; + *priv = *_priv; + } else { + priv = NULL; + } + *ak = *temp; + ak->card = ice->card; + ak->private_value[0] = (unsigned long)priv; + ak->private_data[0] = ice; + if (ak->ops.lock == NULL) + ak->ops.lock = snd_ice1712_akm4xxx_lock; + if (ak->ops.unlock == NULL) + ak->ops.unlock = snd_ice1712_akm4xxx_unlock; + if (ak->ops.write == NULL) + ak->ops.write = snd_ice1712_akm4xxx_write; + snd_akm4xxx_init(ak); + return 0; +} + +void snd_ice1712_akm4xxx_free(struct snd_ice1712 *ice) +{ + unsigned int akidx; + if (ice->akm == NULL) + return; + for (akidx = 0; akidx < ice->akm_codecs; akidx++) { + struct snd_akm4xxx *ak = &ice->akm[akidx]; + kfree((void*)ak->private_value[0]); + } + kfree(ice->akm); +} + +/* + * build AK4xxx controls + */ +int snd_ice1712_akm4xxx_build_controls(struct snd_ice1712 *ice) +{ + unsigned int akidx; + int err; + + for (akidx = 0; akidx < ice->akm_codecs; akidx++) { + struct snd_akm4xxx *ak = &ice->akm[akidx]; + err = snd_akm4xxx_build_controls(ak); + if (err < 0) + return err; + } + return 0; +} + +static int __init alsa_ice1712_akm4xxx_module_init(void) +{ + return 0; +} + +static void __exit alsa_ice1712_akm4xxx_module_exit(void) +{ +} + +module_init(alsa_ice1712_akm4xxx_module_init) +module_exit(alsa_ice1712_akm4xxx_module_exit) + +EXPORT_SYMBOL(snd_ice1712_akm4xxx_init); +EXPORT_SYMBOL(snd_ice1712_akm4xxx_free); +EXPORT_SYMBOL(snd_ice1712_akm4xxx_build_controls); |