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Revision 8c89ecf5c13b0504018c5045896a0b78d5d811e6 authored by Alexander Potapenko on 11 January 2023, 10:50:12 UTC, committed by Alexander Potapenko on 07 February 2023, 09:50:25 UTC 
kmsan: silence -Wmissing-prototypes warnings
 
When building the kernel with W=1, the compiler reports numerous
warnings about the missing prototypes for KMSAN instrumentation hooks.

Because these functions are not supposed to be called explicitly by the
kernel code (calls to them are emitted by the compiler), they do not
have to be declared in the headers. Instead, we add forward declarations
right before the definitions to silence the warnings produced by
-Wmissing-prototypes.

Reported-by: kernel test robot <lkp@intel.com>
Link: https://lore.kernel.org/lkml/202301020356.dFruA4I5-lkp@intel.com/T/
Reported-by: Vlastimil Babka <vbabka@suse.cz>
Suggested-by: Marco Elver <elver@google.com>
Signed-off-by: Alexander Potapenko <glider@google.com>
1 parent 8b0ffea
Raw File
cs5535audio.h 
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __SOUND_CS5535AUDIO_H
#define __SOUND_CS5535AUDIO_H

#define cs_writel(cs5535au, reg, val)	outl(val, (cs5535au)->port + reg)
#define cs_writeb(cs5535au, reg, val)	outb(val, (cs5535au)->port + reg)
#define cs_readl(cs5535au, reg)		inl((cs5535au)->port + reg)
#define cs_readw(cs5535au, reg)		inw((cs5535au)->port + reg)
#define cs_readb(cs5535au, reg)		inb((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_BM0_PRD			0x24
#define ACC_BM1_PRD			0x2C
#define ACC_BM0_STATUS			0x21
#define ACC_BM1_STATUS			0x29
#define ACC_BM0_PNTR			0x60
#define ACC_BM1_PNTR			0x64

/* 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
/* ACC_BMX_STATUS */
#define EOP				(1<<0)
#define BM_EOP_ERR			(1<<1)
/* ACC_BMX_CTL */
#define BM_CTL_EN			0x01
#define BM_CTL_PAUSE			0x03
#define BM_CTL_DIS			0x00
#define BM_CTL_BYTE_ORD_LE		0x00
#define BM_CTL_BYTE_ORD_BE		0x04
/* 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 ACC_CODEC_CNTL_LNK_SHUTDOWN	0x00040000
#define ACC_CODEC_CNTL_LNK_WRM_RST	0x00020000
#define PRD_JMP				0x2000
#define PRD_EOP				0x4000
#define PRD_EOT				0x8000

enum { CS5535AUDIO_DMA_PLAYBACK, CS5535AUDIO_DMA_CAPTURE, NUM_CS5535AUDIO_DMAS };

struct cs5535audio;

struct cs5535audio_dma_ops {
	int type;
	void (*enable_dma)(struct cs5535audio *cs5535au);
	void (*disable_dma)(struct cs5535audio *cs5535au);
	void (*pause_dma)(struct cs5535audio *cs5535au);
	void (*setup_prd)(struct cs5535audio *cs5535au, u32 prd_addr);
	u32 (*read_prd)(struct cs5535audio *cs5535au);
	u32 (*read_dma_pntr)(struct cs5535audio *cs5535au);
};

struct cs5535audio_dma_desc {
	__le32 addr;
	__le16 size;
	__le16 ctlreserved;
};

struct cs5535audio_dma {
	const struct cs5535audio_dma_ops *ops;
	struct snd_dma_buffer desc_buf;
	struct snd_pcm_substream *substream;
	unsigned int buf_addr, buf_bytes;
	unsigned int period_bytes, periods;
	u32 saved_prd;
	int pcm_open_flag;
};

struct cs5535audio {
	struct snd_card *card;
	struct snd_ac97 *ac97;
	struct snd_pcm *pcm;
	int irq;
	struct pci_dev *pci;
	unsigned long port;
	spinlock_t reg_lock;
	struct snd_pcm_substream *playback_substream;
	struct snd_pcm_substream *capture_substream;
	struct cs5535audio_dma dmas[NUM_CS5535AUDIO_DMAS];
};

extern const struct dev_pm_ops snd_cs5535audio_pm;

#ifdef CONFIG_OLPC
void olpc_prequirks(struct snd_card *card,
		    struct snd_ac97_template *ac97);
int olpc_quirks(struct snd_card *card, struct snd_ac97 *ac97);
void olpc_quirks_cleanup(void);
void olpc_analog_input(struct snd_ac97 *ac97, int on);
void olpc_mic_bias(struct snd_ac97 *ac97, int on);

static inline void olpc_capture_open(struct snd_ac97 *ac97)
{
	/* default to Analog Input off */
	olpc_analog_input(ac97, 0);
	/* enable MIC Bias for recording */
	olpc_mic_bias(ac97, 1);
}

static inline void olpc_capture_close(struct snd_ac97 *ac97)
{
	/* disable Analog Input */
	olpc_analog_input(ac97, 0);
	/* disable the MIC Bias (so the recording LED turns off) */
	olpc_mic_bias(ac97, 0);
}
#else
static inline void olpc_prequirks(struct snd_card *card,
		struct snd_ac97_template *ac97) { }
static inline int olpc_quirks(struct snd_card *card, struct snd_ac97 *ac97)
{
	return 0;
}
static inline void olpc_quirks_cleanup(void) { }
static inline void olpc_analog_input(struct snd_ac97 *ac97, int on) { }
static inline void olpc_mic_bias(struct snd_ac97 *ac97, int on) { }
static inline void olpc_capture_open(struct snd_ac97 *ac97) { }
static inline void olpc_capture_close(struct snd_ac97 *ac97) { }
#endif

int snd_cs5535audio_pcm(struct cs5535audio *cs5535audio);

#endif /* __SOUND_CS5535AUDIO_H */
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