[ALSA] Add support for the CS5535 Audio device

Add 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

 From: Alan Cox <alan@lxorguk.ukuu.org.uk>

        cs5535 is a 32bit x86 only device using weird CPU features
Signed-off-by: Jaya Kumar <jayakumar.alsa@gmail.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

CREDITS

@@ -1883,6 +1883,7 @@ N: Jaya Kumar
 E: jayalk@intworks.biz
 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
 

MAINTAINERS

@@ -650,6 +650,11 @@ L:	linux-crypto@vger.kernel.org
 T:	git kernel.org:/pub/scm/linux/kernel/git/herbert/crypto-2.6.git
 S:	Maintained
 
+CS5535 Audio ALSA driver
+P:	Jaya Kumar
+M:	jayakumar.alsa@gmail.com
+S:	Maintained
+
 CYBERPRO FB DRIVER
 P:	Russell King
 M:	rmk@arm.linux.org.uk

include/linux/pci_ids.h

@@ -376,6 +376,10 @@
 #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_SATURN		0x0035
 #define PCI_DEVICE_ID_NS_SCx200_BRIDGE	0x0500
 #define PCI_DEVICE_ID_NS_SCx200_SMI	0x0501

sound/pci/Kconfig

@@ -359,6 +359,19 @@ 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 && X86 && !X86_64
+	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

sound/pci/Makefile

@@ -54,6 +54,7 @@ obj-$(CONFIG_SND) += \
 	au88x0/ \
 	ca0106/ \
 	cs46xx/ \
+	cs5535audio/ \
 	emu10k1/ \
 	hda/ \
 	ice1712/ \

sound/pci/cs5535audio/Makefile

+#
+# Makefile for cs5535audio
+#
+
+snd-cs5535audio-objs := cs5535audio.o cs5535audio_pcm.o
+
+# Toplevel Module Dependency
+obj-$(CONFIG_SND_CS5535AUDIO) += snd-cs5535audio.o

sound/pci/cs5535audio/cs5535audio.h

+#ifndef __SOUND_CS5535AUDIO_H
+#define __SOUND_CS5535AUDIO_H
+
+#define cs_writel(cs5535au, reg, val) outl(val, (int) cs5535au->port + reg)
+#define cs_writeb(cs5535au, reg, val) outb(val, (int) cs5535au->port + reg)
+#define cs_readl(cs5535au, reg)	inl((unsigned short) (cs5535au->port + reg))
+#define cs_readw(cs5535au, reg)	inw((unsigned short) (cs5535au->port + reg))
+#define cs_readb(cs5535au, 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;
+};
+
+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 */
+