*
* Author: Timur Tabi <timur@freescale.com>
*
- * Copyright 2007-2008 Freescale Semiconductor, Inc. This file is licensed
- * under the terms of the GNU General Public License version 2. This
- * program is licensed "as is" without any warranty of any kind, whether
- * express or implied.
+ * Copyright 2007-2010 Freescale Semiconductor, Inc.
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2. This program is licensed "as is" without any warranty of any
+ * kind, whether express or implied.
*/
#include <linux/init.h>
#include <linux/device.h>
#include <linux/delay.h>
#include <linux/slab.h>
+#include <linux/of_platform.h>
#include <sound/core.h>
#include <sound/pcm.h>
/**
* fsl_ssi_private: per-SSI private data
*
- * @name: short name for this device ("SSI0", "SSI1", etc)
* @ssi: pointer to the SSI's registers
* @ssi_phys: physical address of the SSI registers
* @irq: IRQ of this SSI
* @first_stream: pointer to the stream that was opened first
* @second_stream: pointer to second stream
- * @dev: struct device pointer
* @playback: the number of playback streams opened
* @capture: the number of capture streams opened
* @asynchronous: 0=synchronous mode, 1=asynchronous mode
* @cpu_dai: the CPU DAI for this device
* @dev_attr: the sysfs device attribute structure
* @stats: SSI statistics
+ * @name: name for this device
*/
struct fsl_ssi_private {
- char name[8];
struct ccsr_ssi __iomem *ssi;
dma_addr_t ssi_phys;
unsigned int irq;
struct snd_pcm_substream *first_stream;
struct snd_pcm_substream *second_stream;
- struct device *dev;
unsigned int playback;
unsigned int capture;
int asynchronous;
- struct snd_soc_dai cpu_dai;
+ struct snd_soc_dai_driver cpu_dai_drv;
struct device_attribute dev_attr;
+ struct platform_device *pdev;
struct {
unsigned int rfrc;
unsigned int tfe1;
unsigned int tfe0;
} stats;
+
+ char name[1];
};
/**
struct snd_soc_dai *dai)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
- struct fsl_ssi_private *ssi_private = rtd->dai->cpu_dai->private_data;
+ struct fsl_ssi_private *ssi_private = snd_soc_dai_get_drvdata(rtd->cpu_dai);
/*
* If this is the first stream opened, then request the IRQ
struct ccsr_ssi __iomem *ssi = ssi_private->ssi;
int ret;
+ /* The 'name' should not have any slashes in it. */
ret = request_irq(ssi_private->irq, fsl_ssi_isr, 0,
ssi_private->name, ssi_private);
if (ret < 0) {
static int fsl_ssi_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *hw_params, struct snd_soc_dai *cpu_dai)
{
- struct fsl_ssi_private *ssi_private = cpu_dai->private_data;
+ struct fsl_ssi_private *ssi_private = snd_soc_dai_get_drvdata(cpu_dai);
if (substream == ssi_private->first_stream) {
struct ccsr_ssi __iomem *ssi = ssi_private->ssi;
struct snd_soc_dai *dai)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
- struct fsl_ssi_private *ssi_private = rtd->dai->cpu_dai->private_data;
+ struct fsl_ssi_private *ssi_private = snd_soc_dai_get_drvdata(rtd->cpu_dai);
struct ccsr_ssi __iomem *ssi = ssi_private->ssi;
switch (cmd) {
struct snd_soc_dai *dai)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
- struct fsl_ssi_private *ssi_private = rtd->dai->cpu_dai->private_data;
+ struct fsl_ssi_private *ssi_private = snd_soc_dai_get_drvdata(rtd->cpu_dai);
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
ssi_private->playback--;
}
}
-/**
- * fsl_ssi_set_sysclk: set the clock frequency and direction
- *
- * This function is called by the machine driver to tell us what the clock
- * frequency and direction are.
- *
- * Currently, we only support operating as a clock slave (SND_SOC_CLOCK_IN),
- * and we don't care about the frequency. Return an error if the direction
- * is not SND_SOC_CLOCK_IN.
- *
- * @clk_id: reserved, should be zero
- * @freq: the frequency of the given clock ID, currently ignored
- * @dir: SND_SOC_CLOCK_IN (clock slave) or SND_SOC_CLOCK_OUT (clock master)
- */
-static int fsl_ssi_set_sysclk(struct snd_soc_dai *cpu_dai,
- int clk_id, unsigned int freq, int dir)
-{
-
- return (dir == SND_SOC_CLOCK_IN) ? 0 : -EINVAL;
-}
-
-/**
- * fsl_ssi_set_fmt: set the serial format.
- *
- * This function is called by the machine driver to tell us what serial
- * format to use.
- *
- * Currently, we only support I2S mode. Return an error if the format is
- * not SND_SOC_DAIFMT_I2S.
- *
- * @format: one of SND_SOC_DAIFMT_xxx
- */
-static int fsl_ssi_set_fmt(struct snd_soc_dai *cpu_dai, unsigned int format)
-{
- return (format == SND_SOC_DAIFMT_I2S) ? 0 : -EINVAL;
-}
-
-/**
- * fsl_ssi_dai_template: template CPU DAI for the SSI
- */
static struct snd_soc_dai_ops fsl_ssi_dai_ops = {
.startup = fsl_ssi_startup,
.hw_params = fsl_ssi_hw_params,
.shutdown = fsl_ssi_shutdown,
.trigger = fsl_ssi_trigger,
- .set_sysclk = fsl_ssi_set_sysclk,
- .set_fmt = fsl_ssi_set_fmt,
};
-static struct snd_soc_dai fsl_ssi_dai_template = {
+/* Template for the CPU dai driver structure */
+static struct snd_soc_dai_driver fsl_ssi_dai_template = {
.playback = {
/* The SSI does not support monaural audio. */
.channels_min = 2,
}
/**
- * fsl_ssi_create_dai: create a snd_soc_dai structure
- *
- * This function is called by the machine driver to create a snd_soc_dai
- * structure. The function creates an ssi_private object, which contains
- * the snd_soc_dai. It also creates the sysfs statistics device.
+ * Make every character in a string lower-case
*/
-struct snd_soc_dai *fsl_ssi_create_dai(struct fsl_ssi_info *ssi_info)
+static void make_lowercase(char *s)
+{
+ char *p = s;
+ char c;
+
+ while ((c = *p)) {
+ if ((c >= 'A') && (c <= 'Z'))
+ *p = c + ('a' - 'A');
+ p++;
+ }
+}
+
+static int __devinit fsl_ssi_probe(struct of_device *of_dev,
+ const struct of_device_id *match)
{
- struct snd_soc_dai *fsl_ssi_dai;
struct fsl_ssi_private *ssi_private;
int ret = 0;
struct device_attribute *dev_attr;
+ struct device_node *np = of_dev->dev.of_node;
+ const char *p, *sprop;
+ struct resource res;
+ char name[64];
- ssi_private = kzalloc(sizeof(struct fsl_ssi_private), GFP_KERNEL);
+ /* We are only interested in SSIs with a codec phandle in them, so let's
+ * make sure this SSI has one.
+ */
+ if (!of_get_property(np, "codec-handle", NULL))
+ return -ENODEV;
+
+ /* We only support the SSI in "I2S Slave" mode */
+ sprop = of_get_property(np, "fsl,mode", NULL);
+ if (!sprop || strcmp(sprop, "i2s-slave")) {
+ dev_notice(&of_dev->dev, "mode %s is unsupported\n", sprop);
+ return -ENODEV;
+ }
+
+ /* The DAI name is the last part of the full name of the node. */
+ p = strrchr(np->full_name, '/') + 1;
+ ssi_private = kzalloc(sizeof(struct fsl_ssi_private) + strlen(p),
+ GFP_KERNEL);
if (!ssi_private) {
- dev_err(ssi_info->dev, "could not allocate DAI object\n");
- return NULL;
+ dev_err(&of_dev->dev, "could not allocate DAI object\n");
+ return -ENOMEM;
}
- memcpy(&ssi_private->cpu_dai, &fsl_ssi_dai_template,
- sizeof(struct snd_soc_dai));
- fsl_ssi_dai = &ssi_private->cpu_dai;
- dev_attr = &ssi_private->dev_attr;
+ strcpy(ssi_private->name, p);
- sprintf(ssi_private->name, "ssi%u", (u8) ssi_info->id);
- ssi_private->ssi = ssi_info->ssi;
- ssi_private->ssi_phys = ssi_info->ssi_phys;
- ssi_private->irq = ssi_info->irq;
- ssi_private->dev = ssi_info->dev;
- ssi_private->asynchronous = ssi_info->asynchronous;
+ /* Initialize this copy of the CPU DAI driver structure */
+ memcpy(&ssi_private->cpu_dai_drv, &fsl_ssi_dai_template,
+ sizeof(fsl_ssi_dai_template));
+ ssi_private->cpu_dai_drv.name = ssi_private->name;
+
+ /* Get the addresses and IRQ */
+ ret = of_address_to_resource(np, 0, &res);
+ if (ret) {
+ dev_err(&of_dev->dev, "could not determine device resources\n");
+ kfree(ssi_private);
+ return ret;
+ }
+ ssi_private->ssi = ioremap(res.start, 1 + res.end - res.start);
+ ssi_private->ssi_phys = res.start;
+ ssi_private->irq = irq_of_parse_and_map(np, 0);
- dev_set_drvdata(ssi_private->dev, fsl_ssi_dai);
+ /* Are the RX and the TX clocks locked? */
+ if (of_find_property(np, "fsl,ssi-asynchronous", NULL))
+ ssi_private->asynchronous = 1;
+ else
+ ssi_private->cpu_dai_drv.symmetric_rates = 1;
/* Initialize the the device_attribute structure */
- dev_attr->attr.name = "ssi-stats";
+ dev_attr = &ssi_private->dev_attr;
+ dev_attr->attr.name = "statistics";
dev_attr->attr.mode = S_IRUGO;
dev_attr->show = fsl_sysfs_ssi_show;
- ret = device_create_file(ssi_private->dev, dev_attr);
+ ret = device_create_file(&of_dev->dev, dev_attr);
if (ret) {
- dev_err(ssi_info->dev, "could not create sysfs %s file\n",
+ dev_err(&of_dev->dev, "could not create sysfs %s file\n",
ssi_private->dev_attr.attr.name);
- kfree(fsl_ssi_dai);
- return NULL;
+ kfree(ssi_private);
+ return ret;
}
- fsl_ssi_dai->private_data = ssi_private;
- fsl_ssi_dai->name = ssi_private->name;
- fsl_ssi_dai->id = ssi_info->id;
- fsl_ssi_dai->dev = ssi_info->dev;
- fsl_ssi_dai->symmetric_rates = 1;
+ /* Register with ASoC */
+ dev_set_drvdata(&of_dev->dev, ssi_private);
- ret = snd_soc_register_dai(fsl_ssi_dai);
+ ret = snd_soc_register_dai(&of_dev->dev, &ssi_private->cpu_dai_drv);
if (ret != 0) {
- dev_err(ssi_info->dev, "failed to register DAI: %d\n", ret);
- kfree(fsl_ssi_dai);
- return NULL;
+ dev_err(&of_dev->dev, "failed to register DAI: %d\n", ret);
+ kfree(ssi_private);
+ return ret;
+ }
+
+ /* Trigger the machine driver's probe function. The platform driver
+ * name of the machine driver is taken from the /model property of the
+ * device tree. We also pass the address of the CPU DAI driver
+ * structure.
+ */
+ sprop = of_get_property(of_find_node_by_path("/"), "model", NULL);
+ /* Sometimes the model name has a "fsl," prefix, so we strip that. */
+ p = strrchr(sprop, ',');
+ if (p)
+ sprop = p + 1;
+ snprintf(name, sizeof(name), "snd-soc-%s", sprop);
+ make_lowercase(name);
+
+ ssi_private->pdev =
+ platform_device_register_data(&of_dev->dev, name, 0, NULL, 0);
+ if (IS_ERR(ssi_private->pdev)) {
+ ret = PTR_ERR(ssi_private->pdev);
+ dev_err(&of_dev->dev, "failed to register platform: %d\n", ret);
+ kfree(ssi_private);
+ return ret;
}
- return fsl_ssi_dai;
+ return 0;
}
-EXPORT_SYMBOL_GPL(fsl_ssi_create_dai);
/**
* fsl_ssi_destroy_dai: destroy the snd_soc_dai object
*
- * This function undoes the operations of fsl_ssi_create_dai()
+ * This function undoes the operations of fsl_ssi_probe()
*/
-void fsl_ssi_destroy_dai(struct snd_soc_dai *fsl_ssi_dai)
+static int fsl_ssi_remove(struct of_device *of_dev)
{
- struct fsl_ssi_private *ssi_private =
- container_of(fsl_ssi_dai, struct fsl_ssi_private, cpu_dai);
+ struct fsl_ssi_private *ssi_private = dev_get_drvdata(&of_dev->dev);
- device_remove_file(ssi_private->dev, &ssi_private->dev_attr);
-
- snd_soc_unregister_dai(&ssi_private->cpu_dai);
+ platform_device_unregister(ssi_private->pdev);
+ snd_soc_unregister_dai(&of_dev->dev);
+ device_remove_file(&of_dev->dev, &ssi_private->dev_attr);
kfree(ssi_private);
+ dev_set_drvdata(&of_dev->dev, NULL);
+
+ return 0;
}
-EXPORT_SYMBOL_GPL(fsl_ssi_destroy_dai);
+
+static const struct of_device_id fsl_ssi_ids[] = {
+ { .compatible = "fsl,mpc8610-ssi", },
+ {}
+};
+MODULE_DEVICE_TABLE(of, fsl_ssi_ids);
+
+static struct of_platform_driver fsl_ssi_driver = {
+ .driver = {
+ .name = "fsl-ssi-dai",
+ .owner = THIS_MODULE,
+ .of_match_table = fsl_ssi_ids,
+ },
+ .probe = fsl_ssi_probe,
+ .remove = fsl_ssi_remove,
+};
static int __init fsl_ssi_init(void)
{
printk(KERN_INFO "Freescale Synchronous Serial Interface (SSI) ASoC Driver\n");
- return 0;
+ return of_register_platform_driver(&fsl_ssi_driver);
+}
+
+static void __exit fsl_ssi_exit(void)
+{
+ of_unregister_platform_driver(&fsl_ssi_driver);
}
+
module_init(fsl_ssi_init);
+module_exit(fsl_ssi_exit);
MODULE_AUTHOR("Timur Tabi <timur@freescale.com>");
MODULE_DESCRIPTION("Freescale Synchronous Serial Interface (SSI) ASoC Driver");
-MODULE_LICENSE("GPL");
+MODULE_LICENSE("GPL v2");
projects / mirror_ubuntu-artful-kernel.git / blobdiff