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-rw-r--r--packages/linux/linux-2.6.18/at32-dac-oss-driver.patch819
1 files changed, 819 insertions, 0 deletions
diff --git a/packages/linux/linux-2.6.18/at32-dac-oss-driver.patch b/packages/linux/linux-2.6.18/at32-dac-oss-driver.patch
new file mode 100644
index 0000000000..92a17f9af3
--- /dev/null
+++ b/packages/linux/linux-2.6.18/at32-dac-oss-driver.patch
@@ -0,0 +1,819 @@
+From nobody Mon Sep 17 00:00:00 2001
+From: Håvard Skinnemoen <hskinnemoen@atmel.com>
+Date: Mon Apr 3 17:38:29 2006 +0200
+Subject: [PATCH] OSS driver for the AT32 on-chip digital DAC
+
+---
+
+ sound/oss/Kconfig | 4
+ sound/oss/Makefile | 1
+ sound/oss/at32dac.c | 707 ++++++++++++++++++++++++++++++++++++++++++++++++++++
+ sound/oss/at32dac.h | 65 ++++
+ 4 files changed, 777 insertions(+)
+
+Index: linux-2.6.18-avr32/sound/oss/Kconfig
+===================================================================
+--- linux-2.6.18-avr32.orig/sound/oss/Kconfig 2006-11-02 15:54:18.000000000 +0100
++++ linux-2.6.18-avr32/sound/oss/Kconfig 2006-11-02 15:56:20.000000000 +0100
+@@ -869,3 +869,7 @@ config SOUND_SH_DAC_AUDIO_CHANNEL
+ int "DAC channel"
+ default "1"
+ depends on SOUND_SH_DAC_AUDIO
++
++config SOUND_AT32_DAC
++ tristate "Atmel AT32 On-chip DAC support"
++ depends on SOUND_PRIME && AVR32
+Index: linux-2.6.18-avr32/sound/oss/Makefile
+===================================================================
+--- linux-2.6.18-avr32.orig/sound/oss/Makefile 2006-11-02 15:54:18.000000000 +0100
++++ linux-2.6.18-avr32/sound/oss/Makefile 2006-11-02 15:56:20.000000000 +0100
+@@ -10,6 +10,7 @@ obj-$(CONFIG_SOUND_CS4232) += cs4232.o a
+
+ # Please leave it as is, cause the link order is significant !
+
++obj-$(CONFIG_SOUND_AT32_DAC) += at32dac.o
+ obj-$(CONFIG_SOUND_SH_DAC_AUDIO) += sh_dac_audio.o
+ obj-$(CONFIG_SOUND_HAL2) += hal2.o
+ obj-$(CONFIG_SOUND_AEDSP16) += aedsp16.o
+Index: linux-2.6.18-avr32/sound/oss/at32dac.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ linux-2.6.18-avr32/sound/oss/at32dac.c 2006-11-02 15:56:20.000000000 +0100
+@@ -0,0 +1,707 @@
++/*
++ * OSS Sound Driver for the Atmel AT32 on-chip DAC.
++ *
++ * Copyright (C) 2006 Atmel Corporation
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.
++ */
++#include <linux/clk.h>
++#include <linux/dma-mapping.h>
++#include <linux/fs.h>
++#include <linux/init.h>
++#include <linux/interrupt.h>
++#include <linux/kernel.h>
++#include <linux/module.h>
++#include <linux/platform_device.h>
++#include <linux/sound.h>
++#include <linux/soundcard.h>
++
++#include <asm/byteorder.h>
++#include <asm/dma-controller.h>
++#include <asm/io.h>
++#include <asm/uaccess.h>
++
++/* We want to use the "bizarre" swap-bytes-in-each-halfword macro */
++#include <linux/byteorder/swabb.h>
++
++#include "at32dac.h"
++
++#define DMA_BUFFER_SIZE 32768
++#define DMA_PERIOD_SHIFT 10
++#define DMA_PERIOD_SIZE (1 << DMA_PERIOD_SHIFT)
++#define DMA_WRITE_THRESHOLD DMA_PERIOD_SIZE
++
++struct sound_settings {
++ unsigned int format;
++ unsigned int channels;
++ unsigned int sample_rate;
++ /* log2(bytes per sample) */
++ unsigned int input_order;
++};
++
++struct at32_dac {
++ spinlock_t lock;
++ void __iomem *regs;
++
++ /* head and tail refer to number of words */
++ struct {
++ u32 *buf;
++ int head;
++ int tail;
++ } dma;
++
++ struct semaphore sem;
++ wait_queue_head_t write_wait;
++
++ /*
++ * Read at most ucount bytes from ubuf, translate to 2-channel
++ * signed 16-bit big endian format and write to the DMA buffer
++ * as long as there is room left. Return the number of bytes
++ * successfully copied from ubuf, or -EFAULT if the first
++ * sample from ubuf couldn't be read. This function is not
++ * called unless there is room for at least one sample (4
++ * bytes) in the DMA buffer.
++ */
++ int (*trans)(struct at32_dac *dac, const char __user *ubuf,
++ size_t ucount);
++
++ struct sound_settings dsp_settings;
++ struct dma_request_cyclic req;
++
++ struct clk *mck;
++ struct platform_device *pdev;
++ int busy;
++ int playing;
++ int dev_dsp;
++};
++static struct at32_dac *the_dac;
++
++static inline unsigned int at32dac_get_head(struct at32_dac *dac)
++{
++ return dac->dma.head & ((DMA_BUFFER_SIZE / 4) - 1);
++}
++
++static inline unsigned int at32dac_get_tail(struct at32_dac *dac)
++{
++ return dac->dma.tail & ((DMA_BUFFER_SIZE / 4) - 1);
++}
++
++static inline unsigned int at32dac_dma_space(struct at32_dac *dac)
++{
++ unsigned int space;
++
++ space = ((dac->dma.tail - dac->dma.head - 1)
++ & ((DMA_BUFFER_SIZE / 4) - 1));
++ return space;
++}
++
++static void at32dac_update_dma_tail(struct at32_dac *dac)
++{
++ dma_addr_t dma_addr;
++ unsigned int new_tail;
++
++ if (dac->playing) {
++ dma_addr = dma_get_current_pos(dac->req.req.dmac,
++ dac->req.req.channel);
++ new_tail = (dma_addr - dac->req.buffer_start) / 4;
++ if (new_tail >= dac->dma.head
++ && (dac->dma.tail < dac->dma.head
++ || dac->dma.tail > new_tail))
++ printk(KERN_NOTICE "at32dac: underrun\n");
++ dac->dma.tail = new_tail;
++ pr_debug("update tail: 0x%x - 0x%x = %u\n",
++ dma_addr, dac->req.buffer_start, dac->dma.tail);
++ }
++}
++
++static int at32dac_start_genclock(struct at32_dac *dac)
++{
++ unsigned int div;
++
++ div = ((clk_get_rate(boot_cpu_data.clk) + 256 * dac->dsp_settings.sample_rate)
++ / (512 * dac->dsp_settings.sample_rate) - 1);
++ pr_debug("Real sample rate: %llu (div=%u)\n",
++ boot_cpu_data.cpu_hz / (512 * (div + 1)), div);
++ writel((div << 8) | 0x16, (void __iomem *)(0xfff00060 + 4 * 6));
++
++ return 0;
++}
++
++static void at32dac_stop_genclock(struct at32_dac *dac)
++{
++ writel(0, (void __iomem *)(0xfff00060 + 4 * 6));
++}
++
++static int at32dac_start(struct at32_dac *dac)
++{
++ int ret;
++
++ if (dac->playing)
++ return 0;
++
++ memset(dac->dma.buf, 0, DMA_BUFFER_SIZE);
++
++ ret = at32dac_start_genclock(dac);
++ if (ret)
++ return ret;
++
++ ret = dma_prepare_request_cyclic(dac->req.req.dmac, &dac->req);
++ if (ret)
++ goto out_stop_genclock;
++
++ pr_debug("Starting DMA...\n");
++ ret = dma_start_request(dac->req.req.dmac, dac->req.req.channel);
++ if (ret)
++ goto out_stop_request;
++
++ dac_writel(dac, CTRL, DAC_BIT(EN));
++ dac->playing = 1;
++
++ return 0;
++
++out_stop_request:
++ dma_stop_request(dac->req.req.dmac,
++ dac->req.req.channel);
++out_stop_genclock:
++ at32dac_stop_genclock(dac);
++ return ret;
++}
++
++static int at32dac_stop(struct at32_dac *dac)
++{
++ if (dac->playing) {
++ dma_stop_request(dac->req.req.dmac, dac->req.req.channel);
++ dac_writel(dac, DATA, 0);
++ dac_writel(dac, CTRL, 0);
++ dac->playing = 0;
++ at32dac_stop_genclock(dac);
++ }
++
++ return 0;
++}
++
++static int at32dac_dma_prepare(struct at32_dac *dac)
++{
++ dac->dma.buf = dma_alloc_coherent(&dac->pdev->dev, DMA_BUFFER_SIZE,
++ &dac->req.buffer_start, GFP_KERNEL);
++ if (!dac->dma.buf)
++ return -ENOMEM;
++
++ dac->dma.head = dac->dma.tail = 0;
++ dac->req.periods = DMA_BUFFER_SIZE / DMA_PERIOD_SIZE;
++ dac->req.buffer_size = DMA_BUFFER_SIZE;
++
++ return 0;
++}
++
++static void at32dac_dma_cleanup(struct at32_dac *dac)
++{
++ if (dac->dma.buf)
++ dma_free_coherent(&dac->pdev->dev, DMA_BUFFER_SIZE,
++ dac->dma.buf, dac->req.buffer_start);
++ dac->dma.buf = NULL;
++}
++
++static void at32dac_dma_block_complete(struct dma_request *req)
++{
++ struct dma_request_cyclic *creq = to_dma_request_cyclic(req);
++ struct at32_dac *dac = container_of(creq, struct at32_dac, req);
++
++ wake_up(&dac->write_wait);
++}
++
++static void at32dac_dma_error(struct dma_request *req)
++{
++ printk(KERN_ERR "at32dac: DMA error\n");
++}
++
++static irqreturn_t at32dac_interrupt(int irq, void *dev_id,
++ struct pt_regs *regs)
++{
++ struct at32_dac *dac = dev_id;
++ u32 status;
++
++ status = dac_readl(dac, INT_STATUS);
++ if (status & DAC_BIT(UNDERRUN)) {
++ printk(KERN_ERR "at32dac: Underrun detected\n");
++ dac_writel(dac, INT_CLR, DAC_BIT(UNDERRUN));
++ } else {
++ printk(KERN_ERR "at32dac: Spurious interrupt: status=0x%x\n",
++ status);
++ dac_writel(dac, INT_CLR, status);
++ }
++
++ return IRQ_HANDLED;
++}
++
++static ssize_t trans_s16be(struct at32_dac *dac, const char __user *ubuf,
++ size_t ucount)
++{
++ ssize_t ret;
++
++ if (dac->dsp_settings.channels == 2) {
++ const u32 __user *up = (const u32 __user *)ubuf;
++ u32 sample;
++
++ for (ret = 0; ret < (ssize_t)(ucount - 3); ret += 4) {
++ if (!at32dac_dma_space(dac))
++ break;
++
++ if (unlikely(__get_user(sample, up++))) {
++ if (ret == 0)
++ ret = -EFAULT;
++ break;
++ }
++ dac->dma.buf[at32dac_get_head(dac)] = sample;
++ dac->dma.head++;
++ }
++ } else {
++ const u16 __user *up = (const u16 __user *)ubuf;
++ u16 sample;
++
++ for (ret = 0; ret < (ssize_t)(ucount - 1); ret += 2) {
++ if (!at32dac_dma_space(dac))
++ break;
++
++ if (unlikely(__get_user(sample, up++))) {
++ if (ret == 0)
++ ret = -EFAULT;
++ break;
++ }
++ dac->dma.buf[at32dac_get_head(dac)]
++ = (sample << 16) | sample;
++ dac->dma.head++;
++ }
++ }
++
++ return ret;
++}
++
++static ssize_t trans_s16le(struct at32_dac *dac, const char __user *ubuf,
++ size_t ucount)
++{
++ ssize_t ret;
++
++ if (dac->dsp_settings.channels == 2) {
++ const u32 __user *up = (const u32 __user *)ubuf;
++ u32 sample;
++
++ for (ret = 0; ret < (ssize_t)(ucount - 3); ret += 4) {
++ if (!at32dac_dma_space(dac))
++ break;
++
++ if (unlikely(__get_user(sample, up++))) {
++ if (ret == 0)
++ ret = -EFAULT;
++ break;
++ }
++ /* Swap bytes in each halfword */
++ dac->dma.buf[at32dac_get_head(dac)] = swahb32(sample);
++ dac->dma.head++;
++ }
++ } else {
++ const u16 __user *up = (const u16 __user *)ubuf;
++ u16 sample;
++
++ for (ret = 0; ret < (ssize_t)(ucount - 1); ret += 2) {
++ if (!at32dac_dma_space(dac))
++ break;
++
++ if (unlikely(__get_user(sample, up++))) {
++ if (ret == 0)
++ ret = -EFAULT;
++ break;
++ }
++ sample = swab16(sample);
++ dac->dma.buf[at32dac_get_head(dac)]
++ = (sample << 16) | sample;
++ dac->dma.head++;
++ }
++ }
++
++ return ret;
++}
++
++static ssize_t at32dac_dma_translate_from_user(struct at32_dac *dac,
++ const char __user *buffer,
++ size_t count)
++{
++ /* At least one buffer must be available at this point */
++ pr_debug("at32dac: Copying %zu bytes from user...\n", count);
++
++ return dac->trans(dac, buffer, count);
++}
++
++static int at32dac_set_format(struct at32_dac *dac, int format)
++{
++ unsigned int order;
++
++ switch (format) {
++ case AFMT_S16_BE:
++ order = 1;
++ dac->trans = trans_s16be;
++ break;
++ case AFMT_S16_LE:
++ order = 1;
++ dac->trans = trans_s16le;
++ break;
++ default:
++ printk("at32dac: Unsupported format: %d\n", format);
++ return -EINVAL;
++ }
++
++ if (dac->dsp_settings.channels == 2)
++ order++;
++
++ dac->dsp_settings.input_order = order;
++ dac->dsp_settings.format = format;
++ return 0;
++}
++
++static ssize_t at32dac_dsp_write(struct file *file,
++ const char __user *buffer,
++ size_t count, loff_t *ppos)
++{
++ struct at32_dac *dac = file->private_data;
++ DECLARE_WAITQUEUE(wait, current);
++ unsigned int avail;
++ ssize_t copied;
++ ssize_t ret;
++
++ /* Avoid address space checking in the translation functions */
++ if (!access_ok(buffer, count, VERIFY_READ))
++ return -EFAULT;
++
++ down(&dac->sem);
++
++ if (!dac->dma.buf) {
++ ret = at32dac_dma_prepare(dac);
++ if (ret)
++ goto out;
++ }
++
++ add_wait_queue(&dac->write_wait, &wait);
++ ret = 0;
++ while (count > 0) {
++ do {
++ at32dac_update_dma_tail(dac);
++ avail = at32dac_dma_space(dac);
++ set_current_state(TASK_INTERRUPTIBLE);
++ if (avail >= DMA_WRITE_THRESHOLD)
++ break;
++
++ if (file->f_flags & O_NONBLOCK) {
++ if (!ret)
++ ret = -EAGAIN;
++ goto out;
++ }
++
++ pr_debug("Going to wait (avail = %u, count = %zu)\n",
++ avail, count);
++
++ up(&dac->sem);
++ schedule();
++ if (signal_pending(current)) {
++ if (!ret)
++ ret = -ERESTARTSYS;
++ goto out_nosem;
++ }
++ down(&dac->sem);
++ } while (1);
++
++ copied = at32dac_dma_translate_from_user(dac, buffer, count);
++ if (copied < 0) {
++ if (!ret)
++ ret = -EFAULT;
++ goto out;
++ }
++
++ at32dac_start(dac);
++
++ count -= copied;
++ ret += copied;
++ }
++
++out:
++ up(&dac->sem);
++out_nosem:
++ remove_wait_queue(&dac->write_wait, &wait);
++ set_current_state(TASK_RUNNING);
++ return ret;
++}
++
++static int at32dac_dsp_ioctl(struct inode *inode, struct file *file,
++ unsigned int cmd, unsigned long arg)
++{
++ struct at32_dac *dac = file->private_data;
++ int __user *up = (int __user *)arg;
++ struct audio_buf_info abinfo;
++ int val, ret;
++
++ switch (cmd) {
++ case OSS_GETVERSION:
++ return put_user(SOUND_VERSION, up);
++
++ case SNDCTL_DSP_SPEED:
++ if (get_user(val, up))
++ return -EFAULT;
++ if (val >= 0) {
++ at32dac_stop(dac);
++ dac->dsp_settings.sample_rate = val;
++ }
++ return put_user(dac->dsp_settings.sample_rate, up);
++
++ case SNDCTL_DSP_STEREO:
++ if (get_user(val, up))
++ return -EFAULT;
++ at32dac_stop(dac);
++ if (val && dac->dsp_settings.channels == 1)
++ dac->dsp_settings.input_order++;
++ else if (!val && dac->dsp_settings.channels != 1)
++ dac->dsp_settings.input_order--;
++ dac->dsp_settings.channels = val ? 2 : 1;
++ return 0;
++
++ case SNDCTL_DSP_CHANNELS:
++ if (get_user(val, up))
++ return -EFAULT;
++
++ if (val) {
++ if (val < 0 || val > 2)
++ return -EINVAL;
++
++ at32dac_stop(dac);
++ dac->dsp_settings.input_order
++ += val - dac->dsp_settings.channels;
++ dac->dsp_settings.channels = val;
++ }
++ return put_user(val, (int *)arg);
++
++ case SNDCTL_DSP_GETFMTS:
++ return put_user(AFMT_S16_BE | AFMT_S16_BE, up);
++
++ case SNDCTL_DSP_SETFMT:
++ if (get_user(val, up))
++ return -EFAULT;
++
++ if (val == AFMT_QUERY) {
++ val = dac->dsp_settings.format;
++ } else {
++ ret = at32dac_set_format(dac, val);
++ if (ret)
++ return ret;
++ }
++ return put_user(val, up);
++
++ case SNDCTL_DSP_GETOSPACE:
++ at32dac_update_dma_tail(dac);
++ abinfo.fragsize = ((1 << dac->dsp_settings.input_order)
++ * (DMA_PERIOD_SIZE / 4));
++ abinfo.bytes = (at32dac_dma_space(dac)
++ << dac->dsp_settings.input_order);
++ abinfo.fragstotal = ((DMA_BUFFER_SIZE * 4)
++ >> (DMA_PERIOD_SHIFT
++ + dac->dsp_settings.input_order));
++ abinfo.fragments = ((abinfo.bytes
++ >> dac->dsp_settings.input_order)
++ / (DMA_PERIOD_SIZE / 4));
++ pr_debug("fragments=%d fragstotal=%d fragsize=%d bytes=%d\n",
++ abinfo.fragments, abinfo.fragstotal, abinfo.fragsize,
++ abinfo.bytes);
++ return copy_to_user(up, &abinfo, sizeof(abinfo)) ? -EFAULT : 0;
++
++ default:
++ printk("at32dac: Unimplemented ioctl cmd: 0x%x\n", cmd);
++ return -EINVAL;
++ }
++}
++
++static int at32dac_dsp_open(struct inode *inode, struct file *file)
++{
++ struct at32_dac *dac = the_dac;
++ int ret;
++
++ if (file->f_mode & FMODE_READ)
++ return -ENXIO;
++
++ down(&dac->sem);
++ ret = -EBUSY;
++ if (dac->busy)
++ goto out;
++
++ dac->dma.head = dac->dma.tail = 0;
++
++ /* FIXME: What are the correct defaults? */
++ dac->dsp_settings.format = AFMT_S16_BE;
++ dac->dsp_settings.channels = 2;
++ dac->dsp_settings.sample_rate = 8000;
++ dac->dsp_settings.input_order = 2;
++
++ file->private_data = dac;
++ dac->busy = 1;
++
++ ret = 0;
++
++out:
++ up(&dac->sem);
++ return ret;
++}
++
++static int at32dac_dsp_release(struct inode *inode, struct file *file)
++{
++ struct at32_dac *dac = file->private_data;
++
++ down(&dac->sem);
++
++ at32dac_stop(dac);
++ at32dac_dma_cleanup(dac);
++ dac->busy = 0;
++
++ up(&dac->sem);
++
++ return 0;
++}
++
++static struct file_operations at32dac_dsp_fops = {
++ .owner = THIS_MODULE,
++ .llseek = no_llseek,
++ .write = at32dac_dsp_write,
++ .ioctl = at32dac_dsp_ioctl,
++ .open = at32dac_dsp_open,
++ .release = at32dac_dsp_release,
++};
++
++static int __devinit at32dac_probe(struct platform_device *pdev)
++{
++ struct at32_dac *dac;
++ struct resource *regs;
++ struct clk *mck;
++ int irq;
++ int ret;
++
++ if (the_dac)
++ return -EBUSY;
++
++ regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
++ if (!regs)
++ return -ENXIO;
++ irq = platform_get_irq(pdev, 0);
++ if (irq < 0)
++ return irq;
++
++ mck = clk_get(&pdev->dev, "mck");
++ if (IS_ERR(mck))
++ return PTR_ERR(mck);
++ clk_enable(mck);
++
++ ret = -ENOMEM;
++ dac = kzalloc(sizeof(struct at32_dac), GFP_KERNEL);
++ if (!dac)
++ goto out_disable_clk;
++
++ spin_lock_init(&dac->lock);
++ init_MUTEX(&dac->sem);
++ init_waitqueue_head(&dac->write_wait);
++ dac->pdev = pdev;
++ dac->mck = mck;
++
++ dac->regs = ioremap(regs->start, regs->end - regs->start + 1);
++ if (!dac->regs)
++ goto out_free_dac;
++
++ ret = request_irq(irq, at32dac_interrupt, 0, "dac", dac);
++ if (ret)
++ goto out_unmap_regs;
++
++ /* FIXME */
++ dac->req.req.dmac = find_dma_controller(0);
++ if (!dac->req.req.dmac)
++ goto out_free_irq;
++
++ ret = dma_alloc_channel(dac->req.req.dmac);
++ if (ret < 0)
++ goto out_free_irq;
++
++ dac->req.req.channel = ret;
++ dac->req.req.block_complete = at32dac_dma_block_complete;
++ dac->req.req.error = at32dac_dma_error;
++ dac->req.data_reg = regs->start + DAC_DATA;
++ dac->req.periph_id = 2; /* FIXME */
++ dac->req.direction = DMA_DIR_MEM_TO_PERIPH;
++ dac->req.width = DMA_WIDTH_32BIT;
++
++ /* Make sure the DAC is silent and disabled */
++ dac_writel(dac, DATA, 0);
++ dac_writel(dac, CTRL, 0);
++
++ ret = register_sound_dsp(&at32dac_dsp_fops, -1);
++ if (ret < 0)
++ goto out_free_dma;
++ dac->dev_dsp = ret;
++
++ /* TODO: Register mixer */
++
++ the_dac = dac;
++ platform_set_drvdata(pdev, dac);
++
++ return 0;
++
++out_free_dma:
++ dma_release_channel(dac->req.req.dmac, dac->req.req.channel);
++out_free_irq:
++ free_irq(irq, dac);
++out_unmap_regs:
++ iounmap(dac->regs);
++out_free_dac:
++ kfree(dac);
++out_disable_clk:
++ clk_disable(mck);
++ clk_put(mck);
++ return ret;
++}
++
++static int __devexit at32dac_remove(struct platform_device *pdev)
++{
++ struct at32_dac *dac;
++
++ dac = platform_get_drvdata(pdev);
++ if (dac) {
++ unregister_sound_dsp(dac->dev_dsp);
++ dma_release_channel(dac->req.req.dmac, dac->req.req.channel);
++ free_irq(platform_get_irq(pdev, 0), dac);
++ iounmap(dac->regs);
++ clk_disable(dac->mck);
++ clk_put(dac->mck);
++ kfree(dac);
++ platform_set_drvdata(pdev, NULL);
++ the_dac = NULL;
++ }
++
++ return 0;
++}
++
++static struct platform_driver at32dac_driver = {
++ .probe = at32dac_probe,
++ .remove = __devexit_p(at32dac_remove),
++ .driver = {
++ .name = "dac",
++ },
++};
++
++static int __init at32dac_init(void)
++{
++ return platform_driver_register(&at32dac_driver);
++}
++module_init(at32dac_init);
++
++static void __exit at32dac_exit(void)
++{
++ platform_driver_unregister(&at32dac_driver);
++}
++module_exit(at32dac_exit);
++
++MODULE_AUTHOR("Haavard Skinnemoen <hskinnemoen@atmel.com>");
++MODULE_DESCRIPTION("DMA Sound Driver for the Atmel AT32 on-chip DAC");
++MODULE_LICENSE("GPL");
+Index: linux-2.6.18-avr32/sound/oss/at32dac.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ linux-2.6.18-avr32/sound/oss/at32dac.h 2006-11-02 15:57:01.000000000 +0100
+@@ -0,0 +1,65 @@
++/*
++ * Register definitions for the Atmel AT32 on-chip DAC.
++ *
++ * Copyright (C) 2006 Atmel Corporation
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.
++ */
++#ifndef __ASM_AVR32_DAC_H__
++#define __ASM_AVR32_DAC_H__
++
++/* DAC register offsets */
++#define DAC_DATA 0x0000
++#define DAC_CTRL 0x0008
++#define DAC_INT_MASK 0x000c
++#define DAC_INT_EN 0x0010
++#define DAC_INT_DIS 0x0014
++#define DAC_INT_CLR 0x0018
++#define DAC_INT_STATUS 0x001c
++#define DAC_PDC_DATA 0x0020
++
++/* Bitfields in DATA */
++#define DAC_DATA_OFFSET 0
++#define DAC_DATA_SIZE 32
++
++/* Bitfields in CTRL */
++#define DAC_SWAP_OFFSET 30
++#define DAC_SWAP_SIZE 1
++#define DAC_EN_OFFSET 31
++#define DAC_EN_SIZE 1
++
++/* Bitfields in INT_MASK */
++
++/* Bitfields in INT_EN */
++
++/* Bitfields in INT_DIS */
++#define DAC_TX_READY_OFFSET 29
++#define DAC_TX_READY_SIZE 1
++#define DAC_TX_BUFFER_EMPTY_OFFSET 30
++#define DAC_TX_BUFFER_EMPTY_SIZE 1
++#define DAC_CHANNEL_TX_END_OFFSET 31
++#define DAC_CHANNEL_TX_END_SIZE 1
++
++/* Bitfields in INT_CLR */
++#define DAC_UNDERRUN_OFFSET 28
++#define DAC_UNDERRUN_SIZE 1
++
++/* Bitfields in INT_STATUS */
++
++/* Bitfields in PDC_DATA */
++
++/* Bit manipulation macros */
++#define DAC_BIT(name) (1 << DAC_##name##_OFFSET)
++#define DAC_BF(name,value) (((value) & ((1 << DAC_##name##_SIZE) - 1)) << DAC_##name##_OFFSET)
++#define DAC_BFEXT(name,value) (((value) >> DAC_##name##_OFFSET) & ((1 << DAC_##name##_SIZE) - 1))
++#define DAC_BFINS(name,value,old) (((old) & ~(((1 << DAC_##name##_SIZE) - 1) << DAC_##name##_OFFSET)) | DAC_BF(name,value))
++
++/* Register access macros */
++#define dac_readl(port,reg) \
++ __raw_readl((port)->regs + DAC_##reg)
++#define dac_writel(port,reg,value) \
++ __raw_writel((value), (port)->regs + DAC_##reg)
++
++#endif /* __ASM_AVR32_DAC_H__ */
generated by cgit 1.2.3-korg (git 2.39.0) at 2024-05-06 19:25:06 +0000