[PATCH 2.6.13.1 1/1] CS5535 AUDIO ALSA driver

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Hi Jaroslav, Takashi, Martin, alsa and kernel folk,

Appended is my patch adding support for the CS5535 Audio device. I've
fixed up some errors as per Takashi's advice from the thread:

http://lkml.org/lkml/2005/9/15/119

This patch is against 2.6.13.1. Please let me know if there are any
issues.

Thanks,
Jaya Kumar

Signed-off-by: Jaya Kumar <[email protected]>

---

 CREDITS                                 |    1 
 MAINTAINERS                             |    5 
 include/linux/pci_ids.h                 |    4 
 sound/pci/Kconfig                       |   13 
 sound/pci/Makefile                      |    1 
 sound/pci/cs5535audio/Makefile          |    8 
 sound/pci/cs5535audio/cs5535audio.c     |  412 ++++++++++++++++++++++++++++++
 sound/pci/cs5535audio/cs5535audio.h     |  124 +++++++++
 sound/pci/cs5535audio/cs5535audio_pcm.c |  431 ++++++++++++++++++++++++++++++++
 9 files changed, 999 insertions(+)
diff -uprN -X dontdiff.13.1 linux-2.6.13.1-vanilla/CREDITS linux-2.6.13.1/CREDITS
--- linux-2.6.13.1-vanilla/CREDITS	2005-09-15 14:33:46.000000000 +0800
+++ linux-2.6.13.1/CREDITS	2005-09-15 14:51:10.000000000 +0800
@@ -1884,6 +1884,7 @@ N: Jaya Kumar
 E: [email protected]
 W: http://www.intworks.biz
 D: Arc monochrome LCD framebuffer driver, x86 reboot fixups
+D: pirq addr, CS5535 alsa audio driver
 S: Gurgaon, India
 S: Kuala Lumpur, Malaysia
 
diff -uprN -X dontdiff.13.1 linux-2.6.13.1-vanilla/include/linux/pci_ids.h linux-2.6.13.1/include/linux/pci_ids.h
--- linux-2.6.13.1-vanilla/include/linux/pci_ids.h	2005-09-15 14:36:19.000000000 +0800
+++ linux-2.6.13.1/include/linux/pci_ids.h	2005-09-15 14:47:41.000000000 +0800
@@ -392,6 +392,10 @@
 #define PCI_DEVICE_ID_NS_87560_USB	0x0012
 #define PCI_DEVICE_ID_NS_83815		0x0020
 #define PCI_DEVICE_ID_NS_83820		0x0022
+#define PCI_DEVICE_ID_NS_CS5535_IDE	0x002d
+#define PCI_DEVICE_ID_NS_CS5535_AUDIO	0x002e
+#define PCI_DEVICE_ID_NS_CS5535_USB	0x002f
+#define PCI_DEVICE_ID_NS_CS5535_VIDEO	0x0030
 #define PCI_DEVICE_ID_NS_SCx200_BRIDGE	0x0500
 #define PCI_DEVICE_ID_NS_SCx200_SMI	0x0501
 #define PCI_DEVICE_ID_NS_SCx200_IDE	0x0502
diff -uprN -X dontdiff.13.1 linux-2.6.13.1-vanilla/MAINTAINERS linux-2.6.13.1/MAINTAINERS
--- linux-2.6.13.1-vanilla/MAINTAINERS	2005-09-15 14:34:02.000000000 +0800
+++ linux-2.6.13.1/MAINTAINERS	2005-09-15 15:00:19.000000000 +0800
@@ -621,6 +621,11 @@ M:	[email protected]
 L:	[email protected]
 S:	Maintained
 
+CS5535 Audio ALSA driver
+P:	Jaya Kumar
+M:	[email protected]
+S:	Maintained
+
 CYBERPRO FB DRIVER
 P:	Russell King
 M:	[email protected]
diff -uprN -X dontdiff.13.1 linux-2.6.13.1-vanilla/sound/pci/cs5535audio/cs5535audio.c linux-2.6.13.1/sound/pci/cs5535audio/cs5535audio.c
--- linux-2.6.13.1-vanilla/sound/pci/cs5535audio/cs5535audio.c	1970-01-01 07:30:00.000000000 +0730
+++ linux-2.6.13.1/sound/pci/cs5535audio/cs5535audio.c	2005-09-19 10:29:32.000000000 +0800
@@ -0,0 +1,412 @@
+/*
+ * Driver for audio on multifunction CS5535 companion device
+ * Copyright (C) Jaya Kumar
+ *  
+ * Based on Jaroslav Kysela and Takashi Iwai's examples.
+ * This work was sponsored by CIS(M) Sdn Bhd.
+ *
+ * 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 <asm/io.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/init.h>
+#include <linux/pci.h>
+#include <linux/slab.h>
+#include <linux/moduleparam.h>
+#include <sound/driver.h>
+#include <sound/core.h>
+#include <sound/control.h>
+#include <sound/pcm.h>
+#include <sound/rawmidi.h>
+#include <sound/ac97_codec.h>
+#include <sound/initval.h>
+#include <sound/asoundef.h>
+#include "cs5535audio.h"
+
+#define DRIVER_NAME "cs5535audio"
+
+
+static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;	
+static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
+static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;	
+
+static struct pci_device_id snd_cs5535audio_ids[] = {
+	{ PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_CS5535_AUDIO, PCI_ANY_ID, 
+		PCI_ANY_ID, 0, 0, 0, },	
+	{}
+};
+
+MODULE_DEVICE_TABLE(pci, snd_cs5535audio_ids);
+
+static unsigned short snd_cs5535audio_codec_read(cs5535audio_t *cs5535au, 
+							unsigned short reg)
+{
+	unsigned long regdata;
+	unsigned long tmp, timeout;
+	unsigned long val;
+
+	regdata = ((unsigned long) reg) << 24;
+	regdata |= ACC_CODEC_CNTL_RD_CMD;
+	regdata |= CMD_NEW;
+ 
+	cs_writel(ACC_CODEC_CNTL, regdata);
+
+	timeout = 500;
+	do {
+		tmp = cs_readl(ACC_CODEC_CNTL);
+		if (!(tmp & CMD_NEW)) 
+			break;
+		msleep(10);
+	} while (timeout--);
+	if (!timeout) {
+		snd_printk(KERN_ERR "Failure writing to cs5535 codec\n");
+	}
+
+	timeout = 50;
+	do {
+		val = cs_readl(ACC_CODEC_STATUS);
+		if (	(val & STS_NEW) && 
+			((unsigned long) reg == ((0xFF000000 & val)>>24)) )
+			break;
+		msleep(10);
+	} while (timeout--);
+	if (!timeout) {
+		snd_printk(KERN_ERR "Failure reading cs5535 codec\n");
+	}
+
+	return ((unsigned short) val);
+}
+
+static void snd_cs5535audio_codec_write(cs5535audio_t *cs5535au,
+				   unsigned short reg, unsigned short val)
+{
+	unsigned long regdata;
+	unsigned long tmp, timeout;
+
+	regdata = ((unsigned long) reg) << 24; 
+	regdata |= (unsigned long) val;
+	regdata &= CMD_MASK;
+	regdata |= CMD_NEW;
+	regdata &= ACC_CODEC_CNTL_WR_CMD;
+
+	cs_writel(ACC_CODEC_CNTL, regdata);
+
+	timeout = 50;
+	do {
+		tmp = cs_readl(ACC_CODEC_CNTL);
+		if (!(tmp & CMD_NEW)) 
+			break;
+		msleep(10);
+	} while (timeout--);
+	if (!timeout) {
+		snd_printk(KERN_ERR "Failure writing to cs5535 codec\n");
+	}
+}
+
+static void snd_cs5535audio_ac97_codec_write(ac97_t *ac97,
+				   unsigned short reg, unsigned short val)
+{
+	cs5535audio_t *cs5535au = ac97->private_data;
+	snd_cs5535audio_codec_write(cs5535au,reg,val);
+}
+
+static unsigned short snd_cs5535audio_ac97_codec_read(ac97_t *ac97,
+					    unsigned short reg)
+{
+	cs5535audio_t *cs5535au = ac97->private_data;
+	return snd_cs5535audio_codec_read(cs5535au,reg);
+}
+
+static void snd_cs5535audio_mixer_free_ac97(ac97_t *ac97)
+{
+	cs5535audio_t *cs5535audio = ac97->private_data;
+	cs5535audio->ac97 = NULL;
+}
+
+static int snd_cs5535audio_mixer(cs5535audio_t *cs5535au)
+{
+	snd_card_t *card = cs5535au->card;
+	ac97_bus_t *pbus;
+	ac97_template_t ac97;
+	int err;
+	static ac97_bus_ops_t ops = {
+		.write = snd_cs5535audio_ac97_codec_write,
+		.read = snd_cs5535audio_ac97_codec_read,
+	};
+
+	if ((err = snd_ac97_bus(card, 0, &ops, NULL, &pbus)) < 0)
+		return err;
+
+	memset(&ac97, 0, sizeof(ac97));
+	ac97.scaps = AC97_SCAP_AUDIO|AC97_SCAP_SKIP_MODEM;
+	ac97.private_data = cs5535au;
+	ac97.pci = cs5535au->pci;
+	ac97.private_free = snd_cs5535audio_mixer_free_ac97;
+
+	if ((err = snd_ac97_mixer(pbus, &ac97, &cs5535au->ac97)) < 0) {
+		snd_printk("mixer failed\n");
+		return err;
+	}
+
+	return 0;
+}
+
+static void process_bm0_irq(cs5535audio_t *cs5535au)
+{ 
+	u8 bm_stat;
+	spin_lock(&cs5535au->reg_lock);
+	bm_stat = cs_readb(ACC_BM0_STATUS);
+	spin_unlock(&cs5535au->reg_lock);
+	if (bm_stat & EOP) {
+		cs5535audio_dma_t *dma;
+		dma = (cs5535audio_dma_t *) 
+			cs5535au->playback_substream->runtime->private_data;
+		dma->index = (++(dma->index)) % dma->periods;
+		snd_pcm_period_elapsed(cs5535au->playback_substream);
+	} else {
+		snd_printk(KERN_ERR "unexpected bm0 irq src, bm_stat=%x\n",
+					bm_stat);
+	}
+}
+
+static void process_bm1_irq(cs5535audio_t *cs5535au)
+{ 
+	u8 bm_stat;
+	spin_lock(&cs5535au->reg_lock);
+	bm_stat = cs_readb(ACC_BM1_STATUS);
+	spin_unlock(&cs5535au->reg_lock);
+	if (bm_stat & EOP) {
+		cs5535audio_dma_t *dma;
+		dma = (cs5535audio_dma_t *) 
+			cs5535au->capture_substream->runtime->private_data;
+		dma->index = (++(dma->index)) % dma->periods;
+		snd_pcm_period_elapsed(cs5535au->capture_substream);
+	}
+}
+
+static irqreturn_t snd_cs5535audio_interrupt(int irq, void *dev_id, 
+						struct pt_regs *regs)
+{
+	u16 acc_irq_stat;
+	u8 bm_stat;
+	unsigned char count;
+	cs5535audio_t *cs5535au = dev_id;
+
+	if (cs5535au == NULL)
+		return IRQ_NONE;
+
+	acc_irq_stat = cs_readw(ACC_IRQ_STATUS);
+
+	if (!acc_irq_stat)
+		return IRQ_NONE; 
+	for (count=0; count < 10; count++) {
+		if (acc_irq_stat & (1<<count)) {
+			switch (count) {
+				case IRQ_STS:
+					cs_readl(ACC_GPIO_STATUS);
+					break;
+				case WU_IRQ_STS:
+					cs_readl(ACC_GPIO_STATUS);
+					break;
+				case BM0_IRQ_STS:
+					process_bm0_irq(cs5535au);
+					break;
+				case BM1_IRQ_STS:
+					process_bm1_irq(cs5535au);
+					break;
+				case BM2_IRQ_STS:
+					bm_stat = cs_readb(ACC_BM2_STATUS);
+					break;
+				case BM3_IRQ_STS:
+					bm_stat = cs_readb(ACC_BM3_STATUS);
+					break;
+				case BM4_IRQ_STS:
+					bm_stat = cs_readb(ACC_BM4_STATUS);
+					break;
+				case BM5_IRQ_STS:
+					bm_stat = cs_readb(ACC_BM5_STATUS);
+					break;
+				case BM6_IRQ_STS:
+					bm_stat = cs_readb(ACC_BM6_STATUS);
+					break;
+				case BM7_IRQ_STS:
+					bm_stat = cs_readb(ACC_BM7_STATUS);
+					break;
+				default:
+					snd_printk(KERN_ERR 
+						"Unexpected irq src\n");
+					break;	
+			}
+		}
+	}
+	return IRQ_HANDLED;
+}
+
+static int snd_cs5535audio_free(cs5535audio_t *cs5535au)
+{
+	synchronize_irq(cs5535au->irq);
+	pci_set_power_state(cs5535au->pci, 3);
+
+	if (cs5535au->irq >= 0)
+		free_irq(cs5535au->irq, (void *)cs5535au);
+
+	pci_release_regions(cs5535au->pci);
+	pci_disable_device(cs5535au->pci);
+	kfree(cs5535au);
+	return 0;
+}
+
+static int snd_cs5535audio_dev_free(snd_device_t *device)
+{
+	cs5535audio_t *cs5535au = device->device_data;
+	return snd_cs5535audio_free(cs5535au);
+}
+
+static int __devinit snd_cs5535audio_create(snd_card_t *card,
+				     struct pci_dev *pci,
+				     cs5535audio_t **rcs5535au)
+{
+	cs5535audio_t *cs5535au;
+
+	int err;
+	static snd_device_ops_t ops = {
+		.dev_free =	snd_cs5535audio_dev_free,
+	};
+
+	*rcs5535au = NULL;
+	if ((err = pci_enable_device(pci)) < 0)
+		return err;
+
+	cs5535au = kcalloc(1, sizeof(*cs5535au), GFP_KERNEL);
+	if (cs5535au == NULL) {
+		pci_disable_device(pci);
+		return -ENOMEM;
+	}
+	spin_lock_init(&cs5535au->reg_lock);
+	cs5535au->card = card;
+	cs5535au->pci = pci;
+	cs5535au->irq = -1;
+	if ((err = pci_request_regions(pci, "CS5535 Audio")) < 0) {
+		kfree(cs5535au);
+		pci_disable_device(pci);
+		return err;
+	}
+	cs5535au->port = pci_resource_start(pci, 0);
+	if (request_irq(pci->irq, snd_cs5535audio_interrupt, 
+		SA_INTERRUPT|SA_SHIRQ, "CS5535 Audio", (void *) cs5535au)) {
+		snd_printk("unable to grab IRQ %d\n", pci->irq);
+		snd_cs5535audio_free(cs5535au);
+		return -EBUSY;
+	}
+
+	cs5535au->irq = pci->irq;
+	pci_set_master(pci);
+
+	if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, 
+					cs5535au, &ops)) < 0) {
+		snd_cs5535audio_free(cs5535au);
+		return err;
+	}
+
+	snd_card_set_dev(card, &pci->dev);
+
+	*rcs5535au = cs5535au;
+	return 0;
+}
+
+static int __devinit snd_cs5535audio_probe(struct pci_dev *pci,
+					const struct pci_device_id *pci_id)
+{
+	static int dev;
+	snd_card_t *card;
+	cs5535audio_t *cs5535au;
+	int err;
+
+	if (dev >= SNDRV_CARDS)
+		return -ENODEV;
+	if (!enable[dev]) {
+		dev++;
+		return -ENOENT;
+	}
+
+	card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0);
+	if (card == NULL)
+		return -ENOMEM;
+
+	if ((err = snd_cs5535audio_create(card, pci, &cs5535au)) < 0) {
+		snd_card_free(card);
+		return err;
+	}
+
+	if ((err = snd_cs5535audio_mixer(cs5535au)) < 0) {
+		snd_card_free(card);
+		return err;
+	}
+
+	if ((err = snd_cs5535audio_pcm(cs5535au)) < 0) {
+		snd_card_free(card);
+		return err;
+	}
+
+	strcpy(card->driver, DRIVER_NAME);
+
+	strcpy(card->shortname, "CS5535 Audio");
+	sprintf(card->longname, "%s %s at 0x%lx, irq %i",
+		card->shortname, card->driver,
+		cs5535au->port, cs5535au->irq);
+
+	if ((err = snd_card_register(card)) < 0) {
+		snd_card_free(card);
+		return err;
+	}
+
+	pci_set_drvdata(pci, card);
+	dev++;
+	return 0;
+}
+
+static void __devexit snd_cs5535audio_remove(struct pci_dev *pci)
+{
+	snd_card_free(pci_get_drvdata(pci));
+	pci_set_drvdata(pci, NULL);
+}
+
+static struct pci_driver driver = {
+	.name = DRIVER_NAME,
+	.id_table = snd_cs5535audio_ids,
+	.probe = snd_cs5535audio_probe,
+	.remove = __devexit_p(snd_cs5535audio_remove),
+};
+	
+static int __init alsa_card_cs5535audio_init(void)
+{
+	return pci_module_init(&driver);
+}
+
+static void __exit alsa_card_cs5535audio_exit(void)
+{
+	pci_unregister_driver(&driver);
+}
+
+module_init(alsa_card_cs5535audio_init)
+module_exit(alsa_card_cs5535audio_exit)
+
+MODULE_AUTHOR("Jaya Kumar");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("CS5535 Audio");
+MODULE_SUPPORTED_DEVICE("CS5535 Audio");
diff -uprN -X dontdiff.13.1 linux-2.6.13.1-vanilla/sound/pci/cs5535audio/cs5535audio.h linux-2.6.13.1/sound/pci/cs5535audio/cs5535audio.h
--- linux-2.6.13.1-vanilla/sound/pci/cs5535audio/cs5535audio.h	1970-01-01 07:30:00.000000000 +0730
+++ linux-2.6.13.1/sound/pci/cs5535audio/cs5535audio.h	2005-09-18 22:45:33.000000000 +0800
@@ -0,0 +1,124 @@
+#ifndef __SOUND_CS5535AUDIO_H
+#define __SOUND_CS5535AUDIO_H
+
+#define cs_writel(reg, val) 	outl(val, (int) cs5535au->port + reg)
+#define cs_writeb(reg, val) 	outb(val, (int) cs5535au->port + reg)
+#define cs_readl(reg) 		inl((unsigned short) (cs5535au->port + reg))
+#define cs_readw(reg) 		inw((unsigned short) (cs5535au->port + reg))
+#define cs_readb(reg) 		inb((unsigned short) (cs5535au->port + reg))
+
+#define CS5535AUDIO_MAX_DESCRIPTORS	128	
+
+/* acc_codec bar0 reg addrs */
+#define ACC_GPIO_STATUS			0x00
+#define ACC_CODEC_STATUS		0x08
+#define ACC_CODEC_CNTL			0x0C
+#define ACC_IRQ_STATUS			0x12
+#define ACC_BM0_CMD			0x20
+#define ACC_BM1_CMD			0x28
+#define ACC_BM2_CMD			0x30
+#define ACC_BM3_CMD			0x38
+#define ACC_BM4_CMD			0x40
+#define ACC_BM5_CMD			0x48
+#define ACC_BM6_CMD			0x50
+#define ACC_BM7_CMD			0x58
+#define ACC_BM0_PRD			0x24
+#define ACC_BM1_PRD			0x2C
+#define ACC_BM2_PRD			0x34
+#define ACC_BM3_PRD			0x3C
+#define ACC_BM4_PRD			0x44
+#define ACC_BM5_PRD			0x4C
+#define ACC_BM6_PRD			0x54
+#define ACC_BM7_PRD			0x5C
+#define ACC_BM0_STATUS			0x21
+#define ACC_BM1_STATUS			0x29
+#define ACC_BM2_STATUS			0x31
+#define ACC_BM3_STATUS			0x39
+#define ACC_BM4_STATUS			0x41
+#define ACC_BM5_STATUS			0x49
+#define ACC_BM6_STATUS			0x51
+#define ACC_BM7_STATUS			0x59
+#define ACC_BM0_PNTR			0x60
+#define ACC_BM1_PNTR			0x64
+#define ACC_BM2_PNTR			0x68
+#define ACC_BM3_PNTR			0x6C
+#define ACC_BM4_PNTR			0x70
+#define ACC_BM5_PNTR			0x74
+#define ACC_BM6_PNTR			0x78
+#define ACC_BM7_PNTR			0x7C
+/* acc_codec bar0 reg bits */
+/* ACC_IRQ_STATUS */
+#define IRQ_STS 			0
+#define WU_IRQ_STS 			1
+#define BM0_IRQ_STS 			2
+#define BM1_IRQ_STS 			3
+#define BM2_IRQ_STS 			4
+#define BM3_IRQ_STS 			5
+#define BM4_IRQ_STS 			6
+#define BM5_IRQ_STS		 	7
+#define BM6_IRQ_STS 			8
+#define BM7_IRQ_STS 			9
+/* ACC_BMX_STATUS */
+#define EOP				(1<<0)
+#define BM_EOP_ERR			(1<<1)
+/* ACC_BMX_CTL */
+#define BM_CTL_EN			0x00000001
+#define BM_CTL_PAUSE			0x00000011
+#define BM_CTL_DIS			0x00000000
+#define BM_CTL_BYTE_ORD_LE		0x00000000
+#define BM_CTL_BYTE_ORD_BE		0x00000100
+/* cs5535 specific ac97 codec register defines */
+#define CMD_MASK			0xFF00FFFF
+#define CMD_NEW				0x00010000  
+#define STS_NEW				0x00020000
+#define PRM_RDY_STS			0x00800000  
+#define ACC_CODEC_CNTL_WR_CMD		(~0x80000000)
+#define ACC_CODEC_CNTL_RD_CMD		0x80000000
+#define PRD_JMP				0x2000
+#define PRD_EOP				0x4000
+#define PRD_EOT				0x8000
+
+typedef struct _snd_cs5535audio cs5535audio_t;
+typedef struct snd_cs5535audio_dma cs5535audio_dma_t;
+typedef struct snd_cs5535audio_dma_ops cs5535audio_dma_ops_t;
+
+enum { CS5535AUDIO_DMA_PLAYBACK, CS5535AUDIO_DMA_CAPTURE, NUM_CS5535AUDIO_DMAS }; 
+struct snd_cs5535audio_dma_ops {
+	int type;
+	void (*enable_dma)(cs5535audio_t *cs5535au);
+	void (*disable_dma)(cs5535audio_t *cs5535au);
+	void (*pause_dma)(cs5535audio_t *cs5535au);	
+	void (*setup_prd)(cs5535audio_t *cs5535au, u32 prd_addr); 
+	u32 (*read_dma_pntr)(cs5535audio_t *cs5535au); 
+};
+
+typedef struct cs5535audio_dma_desc {
+	u32 addr;	
+	u16 size;
+	u16 ctlreserved;
+} cs5535audio_dma_desc_t;
+
+struct snd_cs5535audio_dma {
+	const cs5535audio_dma_ops_t *ops;
+	struct snd_dma_buffer desc_buf;
+	snd_pcm_substream_t *substream;	
+	unsigned int buf_addr, buf_bytes;	
+	unsigned int period_bytes, periods;
+	int index;
+};
+
+struct _snd_cs5535audio {
+	snd_card_t *card;
+	ac97_t *ac97;
+	int irq;
+	struct pci_dev *pci;
+	unsigned long port;
+	spinlock_t reg_lock;
+	snd_pcm_substream_t *playback_substream;
+	snd_pcm_substream_t *capture_substream;
+	cs5535audio_dma_t dmas[NUM_CS5535AUDIO_DMAS];
+};
+
+int __devinit snd_cs5535audio_pcm(cs5535audio_t *cs5535audio);
+#endif /* __SOUND_CS5535AUDIO_H */
+
diff -uprN -X dontdiff.13.1 linux-2.6.13.1-vanilla/sound/pci/cs5535audio/cs5535audio_pcm.c linux-2.6.13.1/sound/pci/cs5535audio/cs5535audio_pcm.c
--- linux-2.6.13.1-vanilla/sound/pci/cs5535audio/cs5535audio_pcm.c	1970-01-01 07:30:00.000000000 +0730
+++ linux-2.6.13.1/sound/pci/cs5535audio/cs5535audio_pcm.c	2005-09-19 14:26:05.000000000 +0800
@@ -0,0 +1,431 @@
+/*
+ * Driver for audio on multifunction CS5535 companion device
+ * Copyright (C) Jaya Kumar
+ *  
+ * Based on Jaroslav Kysela and Takashi Iwai's examples.
+ * This work was sponsored by CIS(M) Sdn Bhd.
+ *
+ * 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
+ *
+ * todo: add be fmt support, spdif, pm
+ */
+
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/pci.h>
+#include <sound/driver.h>
+#include <sound/core.h>
+#include <sound/control.h>
+#include <sound/initval.h>
+#include <sound/asoundef.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/ac97_codec.h>
+#include "cs5535audio.h"
+
+static snd_pcm_hardware_t snd_cs5535audio_playback =
+{
+	.info =			(
+				SNDRV_PCM_INFO_MMAP | 
+				SNDRV_PCM_INFO_INTERLEAVED |
+		 		SNDRV_PCM_INFO_BLOCK_TRANSFER |
+		 		SNDRV_PCM_INFO_MMAP_VALID |
+		 		SNDRV_PCM_INFO_PAUSE | 
+				SNDRV_PCM_INFO_SYNC_START
+				),
+	.formats =		(
+				SNDRV_PCM_FMTBIT_S16_LE 
+				),
+	.rates =		(
+				SNDRV_PCM_RATE_CONTINUOUS | 
+				SNDRV_PCM_RATE_8000_48000
+				),
+	.rate_min =		4000,
+	.rate_max =		48000,
+	.channels_min =		2,
+	.channels_max =		2,
+	.buffer_bytes_max =	(128*1024),
+	.period_bytes_min =	64,
+	.period_bytes_max =	(64*1024 - 16),
+	.periods_min =		1,
+	.periods_max =		CS5535AUDIO_MAX_DESCRIPTORS,
+	.fifo_size =		0,
+};
+
+static snd_pcm_hardware_t snd_cs5535audio_capture =
+{
+	.info =			(
+				SNDRV_PCM_INFO_MMAP | 
+				SNDRV_PCM_INFO_INTERLEAVED |
+		 		SNDRV_PCM_INFO_BLOCK_TRANSFER |
+		 		SNDRV_PCM_INFO_MMAP_VALID | 
+				SNDRV_PCM_INFO_SYNC_START
+				),
+	.formats =		(
+				SNDRV_PCM_FMTBIT_S16_LE 
+				),
+	.rates =		(
+				SNDRV_PCM_RATE_CONTINUOUS | 
+				SNDRV_PCM_RATE_8000_48000
+				),
+	.rate_min =		4000,
+	.rate_max =		48000,
+	.channels_min =		2,
+	.channels_max =		2,
+	.buffer_bytes_max =	(128*1024),
+	.period_bytes_min =	64,
+	.period_bytes_max =	(64*1024 - 16),
+	.periods_min =		1,
+	.periods_max =		CS5535AUDIO_MAX_DESCRIPTORS,
+	.fifo_size =		0,
+};
+
+static int snd_cs5535audio_playback_open(snd_pcm_substream_t *substream)
+{
+	int err;
+	cs5535audio_t *cs5535au = snd_pcm_substream_chip(substream);
+	snd_pcm_runtime_t *runtime = substream->runtime;
+
+	runtime->hw = snd_cs5535audio_playback;
+	cs5535au->playback_substream = substream;
+	runtime->private_data = &(cs5535au->dmas[CS5535AUDIO_DMA_PLAYBACK]);
+	snd_pcm_set_sync(substream);
+	if ((err = snd_pcm_hw_constraint_integer(runtime, 
+				SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
+		return err;
+
+	return 0;
+}
+
+static int snd_cs5535audio_playback_close(snd_pcm_substream_t *substream)
+{
+	return 0;
+}
+
+#define CS5535AUDIO_DESC_LIST_SIZE \
+	PAGE_ALIGN(CS5535AUDIO_MAX_DESCRIPTORS * sizeof(cs5535audio_dma_desc_t))
+
+static int cs5535audio_build_dma_packets(cs5535audio_t *cs5535au, 
+					cs5535audio_dma_t *dma,
+					snd_pcm_substream_t *substream,
+					unsigned int periods,
+					unsigned int period_bytes)
+{
+	unsigned int i;
+	u32 addr, desc_addr, jmpprd_addr;
+	cs5535audio_dma_desc_t *lastdesc;
+
+	if (periods > CS5535AUDIO_MAX_DESCRIPTORS)
+		return -ENOMEM;
+
+	if (dma->desc_buf.area == NULL) {
+		if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, 
+					snd_dma_pci_data(cs5535au->pci),
+					CS5535AUDIO_DESC_LIST_SIZE+1, 
+					&dma->desc_buf) < 0)
+			return -ENOMEM;
+		dma->period_bytes = dma->periods = 0; 
+	}
+
+	if (dma->periods == periods && dma->period_bytes == period_bytes)
+		return 0;
+
+	addr = (u32)substream->runtime->dma_addr;
+	desc_addr = (u32)dma->desc_buf.addr;
+	for (i = 0; i < periods; i++) {
+		cs5535audio_dma_desc_t *desc = 
+			&((cs5535audio_dma_desc_t *)dma->desc_buf.area)[i];
+		desc->addr = cpu_to_le32(addr);
+		desc->size = period_bytes;
+		desc->ctlreserved = PRD_EOP; 
+		desc_addr += sizeof(cs5535audio_dma_desc_t);
+		addr += period_bytes;
+	}
+	/* we reserved one dummy descriptor at the end to do the PRD jump */
+	lastdesc = &((cs5535audio_dma_desc_t *)dma->desc_buf.area)[periods];
+	lastdesc->addr = cpu_to_le32((u32)dma->desc_buf.addr);
+	lastdesc->size = 0;
+	lastdesc->ctlreserved = PRD_JMP; 
+	jmpprd_addr = cpu_to_le32(lastdesc->addr + 
+				(sizeof(cs5535audio_dma_desc_t)*periods));
+
+	dma->period_bytes = period_bytes;
+	dma->periods = periods;
+	spin_lock_irq(&cs5535au->reg_lock);
+	dma->ops->disable_dma(cs5535au);
+	dma->ops->setup_prd(cs5535au, jmpprd_addr);
+	spin_unlock_irq(&cs5535au->reg_lock);
+	return 0;
+}
+
+static void cs5535audio_playback_enable_dma(cs5535audio_t *cs5535au)
+{
+	cs_writeb(ACC_BM0_CMD, BM_CTL_EN);
+}
+
+static void cs5535audio_playback_disable_dma(cs5535audio_t *cs5535au)
+{
+	cs_writeb(ACC_BM0_CMD, 0);
+}
+
+static void cs5535audio_playback_pause_dma(cs5535audio_t *cs5535au)
+{
+	cs_writeb(ACC_BM0_CMD, BM_CTL_PAUSE);
+}
+
+static void cs5535audio_playback_setup_prd(cs5535audio_t *cs5535au, 
+						u32 prd_addr)
+{
+	cs_writel(ACC_BM0_PRD, prd_addr);
+}
+
+static u32 cs5535audio_playback_read_dma_pntr(cs5535audio_t *cs5535au)
+{
+	return cs_readl(ACC_BM0_PNTR);
+}
+
+static void cs5535audio_capture_enable_dma(cs5535audio_t *cs5535au)
+{
+	cs_writeb(ACC_BM1_CMD, BM_CTL_EN);
+}
+
+static void cs5535audio_capture_disable_dma(cs5535audio_t *cs5535au)
+{
+	cs_writeb(ACC_BM1_CMD, 0);
+}
+
+static void cs5535audio_capture_pause_dma(cs5535audio_t *cs5535au)
+{
+	cs_writeb(ACC_BM1_CMD, BM_CTL_PAUSE);
+}
+
+static void cs5535audio_capture_setup_prd(cs5535audio_t *cs5535au, 
+						u32 prd_addr)
+{
+	cs_writel(ACC_BM1_PRD, prd_addr);
+}
+
+static u32 cs5535audio_capture_read_dma_pntr(cs5535audio_t *cs5535au)
+{
+	return cs_readl(ACC_BM1_PNTR);
+}
+
+static void cs5535audio_clear_dma_packets(cs5535audio_t *cs5535au, 
+					cs5535audio_dma_t *dma, 
+					snd_pcm_substream_t *substream)
+{
+	snd_dma_free_pages(&dma->desc_buf);
+	dma->desc_buf.area = NULL;
+}
+
+static int snd_cs5535audio_hw_params(snd_pcm_substream_t *substream,
+				 snd_pcm_hw_params_t *hw_params)
+{
+	cs5535audio_t *cs5535au = snd_pcm_substream_chip(substream);
+	cs5535audio_dma_t *dma = (cs5535audio_dma_t *)
+					substream->runtime->private_data;
+	int err;
+
+	err = snd_pcm_lib_malloc_pages(substream, 
+					params_buffer_bytes(hw_params));
+	if (err < 0)
+		return err;
+	dma->buf_addr = substream->runtime->dma_addr;
+	dma->buf_bytes = params_buffer_bytes(hw_params);
+
+	err = cs5535audio_build_dma_packets(cs5535au, dma, substream,
+				       params_periods(hw_params),
+				       params_period_bytes(hw_params));
+	return err;
+}
+
+static int snd_cs5535audio_hw_free(snd_pcm_substream_t *substream)
+{
+	cs5535audio_t *cs5535au = snd_pcm_substream_chip(substream);
+	cs5535audio_dma_t *dma = (cs5535audio_dma_t *)
+				substream->runtime->private_data;
+
+	cs5535audio_clear_dma_packets(cs5535au, dma, substream);
+	return snd_pcm_lib_free_pages(substream);
+}
+
+static int snd_cs5535audio_playback_prepare(snd_pcm_substream_t *substream)
+{
+	cs5535audio_t *cs5535au = snd_pcm_substream_chip(substream);
+	return snd_ac97_set_rate(cs5535au->ac97, AC97_PCM_FRONT_DAC_RATE, 
+					substream->runtime->rate);
+}
+
+static int snd_cs5535audio_trigger(snd_pcm_substream_t *substream, int cmd)
+{
+	cs5535audio_t *cs5535au = snd_pcm_substream_chip(substream);
+	cs5535audio_dma_t *dma = (cs5535audio_dma_t *)
+				substream->runtime->private_data;
+
+	switch (cmd) {
+		case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+			spin_lock_irq(&cs5535au->reg_lock);
+			dma->ops->pause_dma(cs5535au);
+			spin_unlock_irq(&cs5535au->reg_lock);
+			break;
+		case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+			spin_lock_irq(&cs5535au->reg_lock);
+			dma->ops->enable_dma(cs5535au);
+			spin_unlock_irq(&cs5535au->reg_lock);
+			break;
+		case SNDRV_PCM_TRIGGER_START:
+			spin_lock_irq(&cs5535au->reg_lock);
+			dma->ops->enable_dma(cs5535au);
+			spin_unlock_irq(&cs5535au->reg_lock);
+			break;
+		case SNDRV_PCM_TRIGGER_STOP:
+			spin_lock_irq(&cs5535au->reg_lock);
+			dma->ops->disable_dma(cs5535au);
+			spin_unlock_irq(&cs5535au->reg_lock);
+			break;
+		default:
+			snd_printk(KERN_ERR "unhandled trigger\n");
+			return -EINVAL;
+			break;
+	}
+	return 0;
+}
+
+static snd_pcm_uframes_t snd_cs5535audio_pcm_pointer(snd_pcm_substream_t 
+							*substream)
+{
+	cs5535audio_t *cs5535au = snd_pcm_substream_chip(substream);
+	u32 curdma;
+	cs5535audio_dma_t *dma;
+
+	dma = (cs5535audio_dma_t *)substream->runtime->private_data;
+	curdma = dma->ops->read_dma_pntr(cs5535au);
+	if (curdma < dma->buf_addr) {
+		snd_printk(KERN_ERR "curdma=%x < %x bufaddr.\n",
+					curdma, dma->buf_addr);
+		return 0;
+	}
+	curdma -= dma->buf_addr;
+	if (curdma >= dma->buf_bytes) {
+		snd_printk(KERN_ERR "diff=%x >= %x buf_bytes.\n",
+					curdma, dma->buf_bytes);
+		return 0;
+	}
+	return bytes_to_frames(substream->runtime, curdma);
+}
+
+static int snd_cs5535audio_capture_open(snd_pcm_substream_t *substream)
+{
+	int err;
+	cs5535audio_t *cs5535au = snd_pcm_substream_chip(substream);
+	snd_pcm_runtime_t *runtime = substream->runtime;
+
+	runtime->hw = snd_cs5535audio_capture;
+	cs5535au->capture_substream = substream;
+	runtime->private_data = &(cs5535au->dmas[CS5535AUDIO_DMA_CAPTURE]);
+	snd_pcm_set_sync(substream);
+	if ((err = snd_pcm_hw_constraint_integer(runtime,
+					 SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
+		return err;
+	return 0;
+}
+
+static int snd_cs5535audio_capture_close(snd_pcm_substream_t *substream)
+{
+	return 0;
+}
+
+static int snd_cs5535audio_capture_prepare(snd_pcm_substream_t *substream)
+{
+	cs5535audio_t *cs5535au = snd_pcm_substream_chip(substream);
+	return snd_ac97_set_rate(cs5535au->ac97, AC97_PCM_LR_ADC_RATE, 
+					substream->runtime->rate);
+}
+
+static snd_pcm_ops_t snd_cs5535audio_playback_ops = {
+	.open =		snd_cs5535audio_playback_open,
+	.close =	snd_cs5535audio_playback_close,
+	.ioctl =	snd_pcm_lib_ioctl,
+	.hw_params =	snd_cs5535audio_hw_params,
+	.hw_free =	snd_cs5535audio_hw_free,
+	.prepare =	snd_cs5535audio_playback_prepare,
+	.trigger =	snd_cs5535audio_trigger,
+	.pointer =	snd_cs5535audio_pcm_pointer,
+};
+
+static snd_pcm_ops_t snd_cs5535audio_capture_ops = {
+	.open =		snd_cs5535audio_capture_open,
+	.close =	snd_cs5535audio_capture_close,
+	.ioctl =	snd_pcm_lib_ioctl,
+	.hw_params =	snd_cs5535audio_hw_params,
+	.hw_free =	snd_cs5535audio_hw_free,
+	.prepare =	snd_cs5535audio_capture_prepare,
+	.trigger =	snd_cs5535audio_trigger,
+	.pointer =	snd_cs5535audio_pcm_pointer,
+};
+
+static void snd_cs5535audio_pcm_free(snd_pcm_t *pcm)
+{
+	snd_pcm_lib_preallocate_free_for_all(pcm);
+}
+
+static cs5535audio_dma_ops_t snd_cs5535audio_playback_dma_ops = {
+        .type = CS5535AUDIO_DMA_PLAYBACK,
+        .enable_dma = cs5535audio_playback_enable_dma,
+        .disable_dma = cs5535audio_playback_disable_dma,
+        .setup_prd = cs5535audio_playback_setup_prd,
+        .pause_dma = cs5535audio_playback_pause_dma,
+        .read_dma_pntr = cs5535audio_playback_read_dma_pntr,
+};
+        
+static cs5535audio_dma_ops_t snd_cs5535audio_capture_dma_ops = {
+        .type = CS5535AUDIO_DMA_CAPTURE,
+        .enable_dma = cs5535audio_capture_enable_dma,
+        .disable_dma = cs5535audio_capture_disable_dma,
+        .setup_prd = cs5535audio_capture_setup_prd,
+        .pause_dma = cs5535audio_capture_pause_dma,
+        .read_dma_pntr = cs5535audio_capture_read_dma_pntr,
+};
+
+int __devinit snd_cs5535audio_pcm(cs5535audio_t *cs5535au)
+{
+	snd_pcm_t *pcm;
+	int err;
+
+	err = snd_pcm_new(cs5535au->card, "CS5535 Audio", 0, 1, 1, &pcm);
+	if (err < 0)
+		return err;
+
+	cs5535au->dmas[CS5535AUDIO_DMA_PLAYBACK].ops = 
+					&snd_cs5535audio_playback_dma_ops;
+	cs5535au->dmas[CS5535AUDIO_DMA_CAPTURE].ops = 
+					&snd_cs5535audio_capture_dma_ops;
+	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, 
+					&snd_cs5535audio_playback_ops);
+	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, 
+					&snd_cs5535audio_capture_ops);
+
+	pcm->private_data = cs5535au;
+	pcm->private_free = snd_cs5535audio_pcm_free;
+	pcm->info_flags = 0;
+	strcpy(pcm->name, "CS5535 Audio");
+
+	snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
+					snd_dma_pci_data(cs5535au->pci),
+					64*1024, 128*1024);
+
+	return 0;
+}
+
diff -uprN -X dontdiff.13.1 linux-2.6.13.1-vanilla/sound/pci/cs5535audio/Makefile linux-2.6.13.1/sound/pci/cs5535audio/Makefile
--- linux-2.6.13.1-vanilla/sound/pci/cs5535audio/Makefile	1970-01-01 07:30:00.000000000 +0730
+++ linux-2.6.13.1/sound/pci/cs5535audio/Makefile	2005-09-15 14:47:41.000000000 +0800
@@ -0,0 +1,8 @@
+#
+# Makefile for cs5535audio
+#
+
+snd-cs5535audio-objs := cs5535audio.o cs5535audio_pcm.o
+
+# Toplevel Module Dependency
+obj-$(CONFIG_SND_CS5535AUDIO) += snd-cs5535audio.o
diff -uprN -X dontdiff.13.1 linux-2.6.13.1-vanilla/sound/pci/Kconfig linux-2.6.13.1/sound/pci/Kconfig
--- linux-2.6.13.1-vanilla/sound/pci/Kconfig	2005-09-15 14:36:41.000000000 +0800
+++ linux-2.6.13.1/sound/pci/Kconfig	2005-09-15 16:34:18.000000000 +0800
@@ -350,6 +350,19 @@ config SND_ENS1370
 	  To compile this driver as a module, choose M here: the module
 	  will be called snd-ens1370.
 
+config SND_CS5535AUDIO
+	tristate "CS5535 Audio"
+	depends on SND
+	select SND_PCM
+	select SND_AC97_CODEC
+	help
+	  Say Y here to include support for audio on CS5535 chips. It is
+	  referred to as NS CS5535 IO or AMD CS5535 IO companion in 
+	  various literature.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called snd-cs5535audio.
+
 config SND_ENS1371
 	tristate "(Creative) Ensoniq AudioPCI 1371/1373"
 	depends on SND
diff -uprN -X dontdiff.13.1 linux-2.6.13.1-vanilla/sound/pci/Makefile linux-2.6.13.1/sound/pci/Makefile
--- linux-2.6.13.1-vanilla/sound/pci/Makefile	2005-09-15 14:36:41.000000000 +0800
+++ linux-2.6.13.1/sound/pci/Makefile	2005-09-15 14:47:41.000000000 +0800
@@ -52,6 +52,7 @@ obj-$(CONFIG_SND) += \
 	au88x0/ \
 	ca0106/ \
 	cs46xx/ \
+	cs5535audio/ \
 	emu10k1/ \
 	hda/ \
 	ice1712/ \
-
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