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1 /*
2  * siu.h - ALSA SoC driver for Renesas SH7343, SH7722 SIU peripheral.
3  *
4  * Copyright (C) 2009-2010 Guennadi Liakhovetski <g.liakhovetski@gmx.de>
5  * Copyright (C) 2006 Carlos Munoz <carlos@kenati.com>
6  *
7  * This program is free software; you can redistribute it and/or modify
8  * it under the terms of the GNU General Public License as published by
9  * the Free Software Foundation; either version 2 of the License, or
10  * (at your option) any later version.
11  *
12  * This program is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15  * GNU General Public License for more details.
16  *
17  * You should have received a copy of the GNU General Public License
18  * along with this program; if not, write to the Free Software
19  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20  */
21 
22 #ifndef SIU_H
23 #define SIU_H
24 
25 /* Common kernel and user-space firmware-building defines and types */
26 
27 #define YRAM0_SIZE		(0x0040 / 4)		/* 16 */
28 #define YRAM1_SIZE		(0x0080 / 4)		/* 32 */
29 #define YRAM2_SIZE		(0x0040 / 4)		/* 16 */
30 #define YRAM3_SIZE		(0x0080 / 4)		/* 32 */
31 #define YRAM4_SIZE		(0x0080 / 4)		/* 32 */
32 #define YRAM_DEF_SIZE		(YRAM0_SIZE + YRAM1_SIZE + YRAM2_SIZE + \
33 				 YRAM3_SIZE + YRAM4_SIZE)
34 #define YRAM_FIR_SIZE		(0x0400 / 4)		/* 256 */
35 #define YRAM_IIR_SIZE		(0x0200 / 4)		/* 128 */
36 
37 #define XRAM0_SIZE		(0x0400 / 4)		/* 256 */
38 #define XRAM1_SIZE		(0x0200 / 4)		/* 128 */
39 #define XRAM2_SIZE		(0x0200 / 4)		/* 128 */
40 
41 /* PRAM program array size */
42 #define PRAM0_SIZE		(0x0100 / 4)		/* 64 */
43 #define PRAM1_SIZE		((0x2000 - 0x0100) / 4)	/* 1984 */
44 
45 #include <linux/types.h>
46 
47 struct siu_spb_param {
48 	__u32	ab1a;	/* input FIFO address */
49 	__u32	ab0a;	/* output FIFO address */
50 	__u32	dir;	/* 0=the ather except CPUOUTPUT, 1=CPUINPUT */
51 	__u32	event;	/* SPB program starting conditions */
52 	__u32	stfifo;	/* STFIFO register setting value */
53 	__u32	trdat;	/* TRDAT register setting value */
54 };
55 
56 struct siu_firmware {
57 	__u32			yram_fir_coeff[YRAM_FIR_SIZE];
58 	__u32			pram0[PRAM0_SIZE];
59 	__u32			pram1[PRAM1_SIZE];
60 	__u32			yram0[YRAM0_SIZE];
61 	__u32			yram1[YRAM1_SIZE];
62 	__u32			yram2[YRAM2_SIZE];
63 	__u32			yram3[YRAM3_SIZE];
64 	__u32			yram4[YRAM4_SIZE];
65 	__u32			spbpar_num;
66 	struct siu_spb_param	spbpar[32];
67 };
68 
69 #ifdef __KERNEL__
70 
71 #include <linux/dmaengine.h>
72 #include <linux/interrupt.h>
73 #include <linux/io.h>
74 #include <linux/sh_dma.h>
75 
76 #include <sound/core.h>
77 #include <sound/pcm.h>
78 #include <sound/soc.h>
79 
80 #define SIU_PERIOD_BYTES_MAX	8192		/* DMA transfer/period size */
81 #define SIU_PERIOD_BYTES_MIN	256		/* DMA transfer/period size */
82 #define SIU_PERIODS_MAX		64		/* Max periods in buffer */
83 #define SIU_PERIODS_MIN		4		/* Min periods in buffer */
84 #define SIU_BUFFER_BYTES_MAX	(SIU_PERIOD_BYTES_MAX * SIU_PERIODS_MAX)
85 
86 /* SIU ports: only one can be used at a time */
87 enum {
88 	SIU_PORT_A,
89 	SIU_PORT_B,
90 	SIU_PORT_NUM,
91 };
92 
93 /* SIU clock configuration */
94 enum {
95 	SIU_CLKA_PLL,
96 	SIU_CLKA_EXT,
97 	SIU_CLKB_PLL,
98 	SIU_CLKB_EXT
99 };
100 
101 struct device;
102 struct siu_info {
103 	struct device		*dev;
104 	int			port_id;
105 	u32 __iomem		*pram;
106 	u32 __iomem		*xram;
107 	u32 __iomem		*yram;
108 	u32 __iomem		*reg;
109 	struct siu_firmware	fw;
110 };
111 
112 struct siu_stream {
113 	struct tasklet_struct		tasklet;
114 	struct snd_pcm_substream	*substream;
115 	snd_pcm_format_t		format;
116 	size_t				buf_bytes;
117 	size_t				period_bytes;
118 	int				cur_period;	/* Period currently in dma */
119 	u32				volume;
120 	snd_pcm_sframes_t		xfer_cnt;	/* Number of frames */
121 	u8				rw_flg;		/* transfer status */
122 	/* DMA status */
123 	struct dma_chan			*chan;		/* DMA channel */
124 	struct dma_async_tx_descriptor	*tx_desc;
125 	dma_cookie_t			cookie;
126 	struct sh_dmae_slave		param;
127 };
128 
129 struct siu_port {
130 	unsigned long		play_cap;	/* Used to track full duplex */
131 	struct snd_pcm		*pcm;
132 	struct siu_stream	playback;
133 	struct siu_stream	capture;
134 	u32			stfifo;		/* STFIFO value from firmware */
135 	u32			trdat;		/* TRDAT value from firmware */
136 };
137 
138 extern struct siu_port *siu_ports[SIU_PORT_NUM];
139 
siu_port_info(struct snd_pcm_substream * substream)140 static inline struct siu_port *siu_port_info(struct snd_pcm_substream *substream)
141 {
142 	struct platform_device *pdev =
143 		to_platform_device(substream->pcm->card->dev);
144 	return siu_ports[pdev->id];
145 }
146 
147 /* Register access */
siu_write32(u32 __iomem * addr,u32 val)148 static inline void siu_write32(u32 __iomem *addr, u32 val)
149 {
150 	__raw_writel(val, addr);
151 }
152 
siu_read32(u32 __iomem * addr)153 static inline u32 siu_read32(u32 __iomem *addr)
154 {
155 	return __raw_readl(addr);
156 }
157 
158 /* SIU registers */
159 #define SIU_IFCTL	(0x000 / sizeof(u32))
160 #define SIU_SRCTL	(0x004 / sizeof(u32))
161 #define SIU_SFORM	(0x008 / sizeof(u32))
162 #define SIU_CKCTL	(0x00c / sizeof(u32))
163 #define SIU_TRDAT	(0x010 / sizeof(u32))
164 #define SIU_STFIFO	(0x014 / sizeof(u32))
165 #define SIU_DPAK	(0x01c / sizeof(u32))
166 #define SIU_CKREV	(0x020 / sizeof(u32))
167 #define SIU_EVNTC	(0x028 / sizeof(u32))
168 #define SIU_SBCTL	(0x040 / sizeof(u32))
169 #define SIU_SBPSET	(0x044 / sizeof(u32))
170 #define SIU_SBFSTS	(0x068 / sizeof(u32))
171 #define SIU_SBDVCA	(0x06c / sizeof(u32))
172 #define SIU_SBDVCB	(0x070 / sizeof(u32))
173 #define SIU_SBACTIV	(0x074 / sizeof(u32))
174 #define SIU_DMAIA	(0x090 / sizeof(u32))
175 #define SIU_DMAIB	(0x094 / sizeof(u32))
176 #define SIU_DMAOA	(0x098 / sizeof(u32))
177 #define SIU_DMAOB	(0x09c / sizeof(u32))
178 #define SIU_DMAML	(0x0a0 / sizeof(u32))
179 #define SIU_SPSTS	(0x0cc / sizeof(u32))
180 #define SIU_SPCTL	(0x0d0 / sizeof(u32))
181 #define SIU_BRGASEL	(0x100 / sizeof(u32))
182 #define SIU_BRRA	(0x104 / sizeof(u32))
183 #define SIU_BRGBSEL	(0x108 / sizeof(u32))
184 #define SIU_BRRB	(0x10c / sizeof(u32))
185 
186 extern struct snd_soc_platform_driver siu_platform;
187 extern struct siu_info *siu_i2s_data;
188 
189 int siu_init_port(int port, struct siu_port **port_info, struct snd_card *card);
190 void siu_free_port(struct siu_port *port_info);
191 
192 #endif
193 
194 #endif /* SIU_H */
195