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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /sound/pci/ice1712/ak4xxx.c
downloadlinux-stericsson-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'sound/pci/ice1712/ak4xxx.c')
-rw-r--r--sound/pci/ice1712/ak4xxx.c194
1 files changed, 194 insertions, 0 deletions
diff --git a/sound/pci/ice1712/ak4xxx.c b/sound/pci/ice1712/ak4xxx.c
new file mode 100644
index 000000000000..ae9dc029ba0d
--- /dev/null
+++ b/sound/pci/ice1712/ak4xxx.c
@@ -0,0 +1,194 @@
+/*
+ * ALSA driver for ICEnsemble ICE1712 (Envy24)
+ *
+ * AK4524 / AK4528 / AK4529 / AK4355 / AK4381 interface
+ *
+ * Copyright (c) 2000 Jaroslav Kysela <perex@suse.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 <sound/driver.h>
+#include <asm/io.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/init.h>
+#include <sound/core.h>
+#include <sound/initval.h>
+#include "ice1712.h"
+
+MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
+MODULE_DESCRIPTION("ICEnsemble ICE17xx <-> AK4xxx AD/DA chip interface");
+MODULE_LICENSE("GPL");
+
+static void snd_ice1712_akm4xxx_lock(akm4xxx_t *ak, int chip)
+{
+ ice1712_t *ice = ak->private_data[0];
+
+ snd_ice1712_save_gpio_status(ice);
+}
+
+static void snd_ice1712_akm4xxx_unlock(akm4xxx_t *ak, int chip)
+{
+ ice1712_t *ice = ak->private_data[0];
+
+ snd_ice1712_restore_gpio_status(ice);
+}
+
+/*
+ * write AK4xxx register
+ */
+static void snd_ice1712_akm4xxx_write(akm4xxx_t *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];
+ ice1712_t *ice = ak->private_data[0];
+
+ snd_assert(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 akm4xxx_t record with the template
+ */
+int snd_ice1712_akm4xxx_init(akm4xxx_t *ak, const akm4xxx_t *temp,
+ const struct snd_ak4xxx_private *_priv, ice1712_t *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(ice1712_t *ice)
+{
+ unsigned int akidx;
+ if (ice->akm == NULL)
+ return;
+ for (akidx = 0; akidx < ice->akm_codecs; akidx++) {
+ akm4xxx_t *ak = &ice->akm[akidx];
+ kfree((void*)ak->private_value[0]);
+ }
+ kfree(ice->akm);
+}
+
+/*
+ * build AK4xxx controls
+ */
+int snd_ice1712_akm4xxx_build_controls(ice1712_t *ice)
+{
+ unsigned int akidx;
+ int err;
+
+ for (akidx = 0; akidx < ice->akm_codecs; akidx++) {
+ akm4xxx_t *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);