projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blame
| Commit | Line | Data |
|---|---|---|
| 6c742509 SG |
1 | /* |
| 2 | * at91-pcm.h - ALSA PCM interface for the Atmel AT91 SoC. | |
| 3 | * | |
| 4 | * Copyright (C) 2005 SAN People | |
| 5 | * Copyright (C) 2008 Atmel | |
| 6 | * | |
| 7 | * Authors: Sedji Gaouaou <sedji.gaouaou@atmel.com> | |
| 8 | * | |
| 9 | * Based on at91-pcm. by: | |
| 10 | * Frank Mandarino <fmandarino@endrelia.com> | |
| 11 | * Copyright 2006 Endrelia Technologies Inc. | |
| 12 | * | |
| 13 | * Based on pxa2xx-pcm.c by: | |
| 14 | * | |
| 15 | * Author: Nicolas Pitre | |
| 16 | * Created: Nov 30, 2004 | |
| 17 | * Copyright: (C) 2004 MontaVista Software, Inc. | |
| 18 | * | |
| 19 | * This program is free software; you can redistribute it and/or modify | |
| 20 | * it under the terms of the GNU General Public License as published by | |
| 21 | * the Free Software Foundation; either version 2 of the License, or | |
| 22 | * (at your option) any later version. | |
| 23 | * | |
| 24 | * This program is distributed in the hope that it will be useful, | |
| 25 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 26 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 27 | * GNU General Public License for more details. | |
| 28 | * | |
| 29 | * You should have received a copy of the GNU General Public License | |
| 30 | * along with this program; if not, write to the Free Software | |
| 31 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| 32 | */ | |
| 33 | ||
| 34 | #ifndef _ATMEL_PCM_H | |
| 35 | #define _ATMEL_PCM_H | |
| 36 | ||
| 37 | #include <linux/atmel-ssc.h> | |
| 38 | ||
| 92dfa619 BS |
39 | #define ATMEL_SSC_DMABUF_SIZE (64 * 1024) |
| 40 | ||
| 6c742509 SG |
41 | /* |
| 42 | * Registers and status bits that are required by the PCM driver. | |
| 43 | */ | |
| 44 | struct atmel_pdc_regs { | |
| 45 | unsigned int xpr; /* PDC recv/trans pointer */ | |
| 46 | unsigned int xcr; /* PDC recv/trans counter */ | |
| 47 | unsigned int xnpr; /* PDC next recv/trans pointer */ | |
| 48 | unsigned int xncr; /* PDC next recv/trans counter */ | |
| 49 | unsigned int ptcr; /* PDC transfer control */ | |
| 50 | }; | |
| 51 | ||
| 52 | struct atmel_ssc_mask { | |
| 53 | u32 ssc_enable; /* SSC recv/trans enable */ | |
| 54 | u32 ssc_disable; /* SSC recv/trans disable */ | |
| 3951e4aa | 55 | u32 ssc_error; /* SSC error conditions */ |
| 6c742509 SG |
56 | u32 ssc_endx; /* SSC ENDTX or ENDRX */ |
| 57 | u32 ssc_endbuf; /* SSC TXBUFE or RXBUFF */ | |
| 58 | u32 pdc_enable; /* PDC recv/trans enable */ | |
| 59 | u32 pdc_disable; /* PDC recv/trans disable */ | |
| 60 | }; | |
| 61 | ||
| 62 | /* | |
| 63 | * This structure, shared between the PCM driver and the interface, | |
| 64 | * contains all information required by the PCM driver to perform the | |
| 65 | * PDC DMA operation. All fields except dma_intr_handler() are initialized | |
| 97b4fc3c | 66 | * by the interface. The dma_intr_handler() pointer is set by the PCM |
| 6c742509 SG |
67 | * driver and called by the interface SSC interrupt handler if it is |
| 68 | * non-NULL. | |
| 69 | */ | |
| 70 | struct atmel_pcm_dma_params { | |
| 71 | char *name; /* stream identifier */ | |
| 72 | int pdc_xfer_size; /* PDC counter increment in bytes */ | |
| 73 | struct ssc_device *ssc; /* SSC device for stream */ | |
| 74 | struct atmel_pdc_regs *pdc; /* PDC receive or transmit registers */ | |
| 75 | struct atmel_ssc_mask *mask; /* SSC & PDC status bits */ | |
| 76 | struct snd_pcm_substream *substream; | |
| 77 | void (*dma_intr_handler)(u32, struct snd_pcm_substream *); | |
| 78 | }; | |
| 79 | ||
| 6c742509 SG |
80 | /* |
| 81 | * SSC register access (since ssc_writel() / ssc_readl() require literal name) | |
| 82 | */ | |
| 83 | #define ssc_readx(base, reg) (__raw_readl((base) + (reg))) | |
| 84 | #define ssc_writex(base, reg, value) __raw_writel((value), (base) + (reg)) | |
| 85 | ||
| 92dfa619 BS |
86 | int atmel_pcm_new(struct snd_soc_pcm_runtime *rtd); |
| 87 | void atmel_pcm_free(struct snd_pcm *pcm); | |
| 88 | int atmel_pcm_mmap(struct snd_pcm_substream *substream, | |
| 89 | struct vm_area_struct *vma); | |
| 90 | ||
| d8976cfd BS |
91 | #if defined(CONFIG_SND_ATMEL_SOC_PDC) || \ |
| 92 | defined(CONFIG_SND_ATMEL_SOC_PDC_MODULE) | |
| 92dfa619 BS |
93 | int atmel_pcm_pdc_platform_register(struct device *dev); |
| 94 | void atmel_pcm_pdc_platform_unregister(struct device *dev); | |
| 95 | #else | |
| 96 | static inline int atmel_pcm_pdc_platform_register(struct device *dev) | |
| 97 | { | |
| 98 | return 0; | |
| 99 | } | |
| 100 | static inline void atmel_pcm_pdc_platform_unregister(struct device *dev) | |
| 101 | { | |
| 102 | } | |
| 103 | #endif | |
| be681a82 | 104 | |
| d8976cfd BS |
105 | #if defined(CONFIG_SND_ATMEL_SOC_DMA) || \ |
| 106 | defined(CONFIG_SND_ATMEL_SOC_DMA_MODULE) | |
| 3951e4aa BS |
107 | int atmel_pcm_dma_platform_register(struct device *dev); |
| 108 | void atmel_pcm_dma_platform_unregister(struct device *dev); | |
| 109 | #else | |
| 110 | static inline int atmel_pcm_dma_platform_register(struct device *dev) | |
| 111 | { | |
| 112 | return 0; | |
| 113 | } | |
| 114 | static inline void atmel_pcm_dma_platform_unregister(struct device *dev) | |
| 115 | { | |
| 116 | } | |
| 117 | #endif | |
| 118 | ||
| 6c742509 | 119 | #endif /* _ATMEL_PCM_H */ |