/* * Freescale MPC5200 Audio DMA driver */ #ifndef __SOUND_SOC_FSL_MPC5200_DMA_H__ #define __SOUND_SOC_FSL_MPC5200_DMA_H__ #define PSC_STREAM_NAME_LEN 32 /** * psc_ac97_stream - Data specific to a single stream (playback or capture) * @active: flag indicating if the stream is active * @psc_dma: pointer back to parent psc_dma data structure * @bcom_task: bestcomm task structure * @irq: irq number for bestcomm task * @period_end: physical address of end of DMA region * @period_next_pt: physical address of next DMA buffer to enqueue * @period_bytes: size of DMA period in bytes * @ac97_slot_bits: Enable bits for turning on the correct AC97 slot */ struct psc_dma_stream { struct snd_pcm_runtime *runtime; int active; struct psc_dma *psc_dma; struct bcom_task *bcom_task; int irq; struct snd_pcm_substream *stream; int period_next; int period_current; int period_bytes; int period_count; /* AC97 state */ u32 ac97_slot_bits; }; /** * psc_dma - Private driver data * @name: short name for this device ("PSC0", "PSC1", etc) * @psc_regs: pointer to the PSC's registers * @fifo_regs: pointer to the PSC's FIFO registers * @irq: IRQ of this PSC * @dev: struct device pointer * @dai: the CPU DAI for this device * @sicr: Base value used in serial interface control register; mode is ORed * with this value. * @playback: Playback stream context data * @capture: Capture stream context data */ struct psc_dma { char name[32]; struct mpc52xx_psc __iomem *psc_regs; struct mpc52xx_psc_fifo __iomem *fifo_regs; unsigned int irq; struct device *dev; spinlock_t lock; struct mutex mutex; u32 sicr; uint sysclk; int imr; int id; unsigned int slots; /* per-stream data */ struct psc_dma_stream playback; struct psc_dma_stream capture; /* Statistics */ struct { unsigned long overrun_count; unsigned long underrun_count; } stats; }; /* Utility for retrieving psc_dma_stream structure from a substream */ static inline struct psc_dma_stream * to_psc_dma_stream(struct snd_pcm_substream *substream, struct psc_dma *psc_dma) { if (substream->pstr->stream == SNDRV_PCM_STREAM_CAPTURE) return &psc_dma->capture; return &psc_dma->playback; } int mpc5200_audio_dma_create(struct platform_device *op); int mpc5200_audio_dma_destroy(struct platform_device *op); #endif /* __SOUND_SOC_FSL_MPC5200_DMA_H__ */ e='author'>author
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authorzhong jiang <zhongjiang@huawei.com>2017-01-24 15:18:52 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2017-01-24 16:26:14 -0800
commit3277953de2f31dd03c6375e9a9f680ac37fc9d27 (patch)
tree6ba22924faa1b82ef2f0277db10a3f5abdc44157 /sound/soc/tegra
parent3705ccfdd1e8b539225ce20e3925a945cc788d67 (diff)
mm: do not export ioremap_page_range symbol for external module
Recently, I've found cases in which ioremap_page_range was used incorrectly, in external modules, leading to crashes. This can be partly attributed to the fact that ioremap_page_range is lower-level, with fewer protections, as compared to the other functions that an external module would typically call. Those include: ioremap_cache ioremap_nocache ioremap_prot ioremap_uc ioremap_wc ioremap_wt ...each of which wraps __ioremap_caller, which in turn provides a safer way to achieve the mapping. Therefore, stop EXPORT-ing ioremap_page_range. Link: http://lkml.kernel.org/r/1485173220-29010-1-git-send-email-zhongjiang@huawei.com Signed-off-by: zhong jiang <zhongjiang@huawei.com> Reviewed-by: John Hubbard <jhubbard@nvidia.com> Suggested-by: John Hubbard <jhubbard@nvidia.com> Acked-by: Michal Hocko <mhocko@suse.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'sound/soc/tegra')