blob: dd9963345b930c8aed8aaac81392e9200fea484b [file] [log] [blame]
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +09001/*
2 * Fifo-attached Serial Interface (FSI) support for SH7724
3 *
4 * Copyright (C) 2009 Renesas Solutions Corp.
5 * Kuninori Morimoto <morimoto.kuninori@renesas.com>
6 *
7 * Based on ssi.c
8 * Copyright (c) 2007 Manuel Lauss <mano@roarinelk.homelinux.net>
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
13 */
14
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +090015#include <linux/delay.h>
Kuninori Morimoto785d1c42009-11-30 20:24:48 +090016#include <linux/pm_runtime.h>
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +090017#include <linux/io.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090018#include <linux/slab.h>
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +090019#include <sound/soc.h>
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +090020#include <sound/sh_fsi.h>
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +090021
22#define DO_FMT 0x0000
23#define DOFF_CTL 0x0004
24#define DOFF_ST 0x0008
25#define DI_FMT 0x000C
26#define DIFF_CTL 0x0010
27#define DIFF_ST 0x0014
28#define CKG1 0x0018
29#define CKG2 0x001C
30#define DIDT 0x0020
31#define DODT 0x0024
32#define MUTE_ST 0x0028
Kuninori Morimoto3bc28072010-07-29 16:48:32 +090033#define OUT_SEL 0x0030
34#define REG_END OUT_SEL
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +090035
Kuninori Morimoto3bc28072010-07-29 16:48:32 +090036#define A_MST_CTLR 0x0180
37#define B_MST_CTLR 0x01A0
Kuninori Morimotocc780d32010-03-25 19:15:53 +090038#define CPU_INT_ST 0x01F4
39#define CPU_IEMSK 0x01F8
40#define CPU_IMSK 0x01FC
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +090041#define INT_ST 0x0200
42#define IEMSK 0x0204
43#define IMSK 0x0208
44#define MUTE 0x020C
45#define CLK_RST 0x0210
46#define SOFT_RST 0x0214
Kuninori Morimoto4a942b42010-03-25 19:15:51 +090047#define FIFO_SZ 0x0218
Kuninori Morimoto3bc28072010-07-29 16:48:32 +090048#define MREG_START A_MST_CTLR
Kuninori Morimoto4a942b42010-03-25 19:15:51 +090049#define MREG_END FIFO_SZ
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +090050
51/* DO_FMT */
52/* DI_FMT */
Kuninori Morimotoa7ffb522010-07-13 12:13:00 +090053#define CR_MONO (0x0 << 4)
54#define CR_MONO_D (0x1 << 4)
55#define CR_PCM (0x2 << 4)
56#define CR_I2S (0x3 << 4)
57#define CR_TDM (0x4 << 4)
58#define CR_TDM_D (0x5 << 4)
Kuninori Morimoto3bc28072010-07-29 16:48:32 +090059#define CR_SPDIF 0x00100120
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +090060
61/* DOFF_CTL */
62/* DIFF_CTL */
63#define IRQ_HALF 0x00100000
64#define FIFO_CLR 0x00000001
65
66/* DOFF_ST */
67#define ERR_OVER 0x00000010
68#define ERR_UNDER 0x00000001
Kuninori Morimoto59c3b002009-12-28 14:09:16 +090069#define ST_ERR (ERR_OVER | ERR_UNDER)
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +090070
Kuninori Morimotoccad7b42010-07-13 12:13:14 +090071/* CKG1 */
72#define ACKMD_MASK 0x00007000
73#define BPFMD_MASK 0x00000700
74
Kuninori Morimoto3bc28072010-07-29 16:48:32 +090075/* A/B MST_CTLR */
76#define BP (1 << 4) /* Fix the signal of Biphase output */
77#define SE (1 << 0) /* Fix the master clock */
78
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +090079/* CLK_RST */
80#define B_CLK 0x00000010
81#define A_CLK 0x00000001
82
83/* INT_ST */
84#define INT_B_IN (1 << 12)
85#define INT_B_OUT (1 << 8)
86#define INT_A_IN (1 << 4)
87#define INT_A_OUT (1 << 0)
88
Kuninori Morimotofeb58cf2010-03-24 15:27:24 +090089/* SOFT_RST */
90#define PBSR (1 << 12) /* Port B Software Reset */
91#define PASR (1 << 8) /* Port A Software Reset */
92#define IR (1 << 4) /* Interrupt Reset */
93#define FSISR (1 << 0) /* Software Reset */
94
Kuninori Morimoto4a942b42010-03-25 19:15:51 +090095/* FIFO_SZ */
96#define OUT_SZ_MASK 0x7
97#define BO_SZ_SHIFT 8
98#define AO_SZ_SHIFT 0
99
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900100#define FSI_RATES SNDRV_PCM_RATE_8000_96000
101
102#define FSI_FMTS (SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S16_LE)
103
Kuninori Morimotoc8fe2572010-09-17 13:48:17 +0900104/*
Kuninori Morimoto5bfb9ad2010-09-17 13:48:45 +0900105 * FSI driver use below type name for variable
106 *
107 * xxx_len : data length
108 * xxx_width : data width
109 * xxx_offset : data offset
110 * xxx_num : number of data
111 */
112
113/*
Kuninori Morimotoc8fe2572010-09-17 13:48:17 +0900114 * struct
115 */
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900116
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900117struct fsi_priv {
118 void __iomem *base;
119 struct snd_pcm_substream *substream;
Kuninori Morimoto71f6e062009-12-02 15:11:08 +0900120 struct fsi_master *master;
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900121
Kuninori Morimoto5bfb9ad2010-09-17 13:48:45 +0900122 int fifo_max_num;
123 int chan_num;
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900124
Kuninori Morimoto5bfb9ad2010-09-17 13:48:45 +0900125 int buff_offset;
126 int buff_len;
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900127 int period_len;
Kuninori Morimoto5bfb9ad2010-09-17 13:48:45 +0900128 int period_num;
Kuninori Morimoto3bc28072010-07-29 16:48:32 +0900129
130 u32 mst_ctrl;
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900131};
132
Kuninori Morimoto73b92c12010-07-13 12:13:04 +0900133struct fsi_core {
134 int ver;
135
Kuninori Morimotocc780d32010-03-25 19:15:53 +0900136 u32 int_st;
137 u32 iemsk;
138 u32 imsk;
139};
140
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900141struct fsi_master {
142 void __iomem *base;
143 int irq;
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900144 struct fsi_priv fsia;
145 struct fsi_priv fsib;
Kuninori Morimoto73b92c12010-07-13 12:13:04 +0900146 struct fsi_core *core;
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900147 struct sh_fsi_platform_info *info;
Kuninori Morimoto8fc176d2010-01-28 13:46:16 +0900148 spinlock_t lock;
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900149};
150
Kuninori Morimotoc8fe2572010-09-17 13:48:17 +0900151/*
152 * basic read write function
153 */
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900154
Guennadi Liakhovetski0f69d972010-02-03 17:37:23 +0100155static void __fsi_reg_write(u32 reg, u32 data)
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900156{
157 /* valid data area is 24bit */
158 data &= 0x00ffffff;
159
Guennadi Liakhovetski0f69d972010-02-03 17:37:23 +0100160 __raw_writel(data, reg);
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900161}
162
163static u32 __fsi_reg_read(u32 reg)
164{
Guennadi Liakhovetski0f69d972010-02-03 17:37:23 +0100165 return __raw_readl(reg);
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900166}
167
Guennadi Liakhovetski0f69d972010-02-03 17:37:23 +0100168static void __fsi_reg_mask_set(u32 reg, u32 mask, u32 data)
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900169{
170 u32 val = __fsi_reg_read(reg);
171
172 val &= ~mask;
173 val |= data & mask;
174
Guennadi Liakhovetski0f69d972010-02-03 17:37:23 +0100175 __fsi_reg_write(reg, val);
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900176}
177
Guennadi Liakhovetski0f69d972010-02-03 17:37:23 +0100178static void fsi_reg_write(struct fsi_priv *fsi, u32 reg, u32 data)
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900179{
Kuninori Morimotod7854142010-07-13 12:13:09 +0900180 if (reg > REG_END) {
181 pr_err("fsi: register access err (%s)\n", __func__);
Guennadi Liakhovetski0f69d972010-02-03 17:37:23 +0100182 return;
Kuninori Morimotod7854142010-07-13 12:13:09 +0900183 }
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900184
Guennadi Liakhovetski0f69d972010-02-03 17:37:23 +0100185 __fsi_reg_write((u32)(fsi->base + reg), data);
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900186}
187
188static u32 fsi_reg_read(struct fsi_priv *fsi, u32 reg)
189{
Kuninori Morimotod7854142010-07-13 12:13:09 +0900190 if (reg > REG_END) {
191 pr_err("fsi: register access err (%s)\n", __func__);
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900192 return 0;
Kuninori Morimotod7854142010-07-13 12:13:09 +0900193 }
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900194
195 return __fsi_reg_read((u32)(fsi->base + reg));
196}
197
Guennadi Liakhovetski0f69d972010-02-03 17:37:23 +0100198static void fsi_reg_mask_set(struct fsi_priv *fsi, u32 reg, u32 mask, u32 data)
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900199{
Kuninori Morimotod7854142010-07-13 12:13:09 +0900200 if (reg > REG_END) {
201 pr_err("fsi: register access err (%s)\n", __func__);
Guennadi Liakhovetski0f69d972010-02-03 17:37:23 +0100202 return;
Kuninori Morimotod7854142010-07-13 12:13:09 +0900203 }
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900204
Guennadi Liakhovetski0f69d972010-02-03 17:37:23 +0100205 __fsi_reg_mask_set((u32)(fsi->base + reg), mask, data);
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900206}
207
Guennadi Liakhovetski0f69d972010-02-03 17:37:23 +0100208static void fsi_master_write(struct fsi_master *master, u32 reg, u32 data)
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900209{
Kuninori Morimoto8fc176d2010-01-28 13:46:16 +0900210 unsigned long flags;
211
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900212 if ((reg < MREG_START) ||
Kuninori Morimotod7854142010-07-13 12:13:09 +0900213 (reg > MREG_END)) {
214 pr_err("fsi: register access err (%s)\n", __func__);
Guennadi Liakhovetski0f69d972010-02-03 17:37:23 +0100215 return;
Kuninori Morimotod7854142010-07-13 12:13:09 +0900216 }
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900217
Kuninori Morimoto8fc176d2010-01-28 13:46:16 +0900218 spin_lock_irqsave(&master->lock, flags);
Guennadi Liakhovetski0f69d972010-02-03 17:37:23 +0100219 __fsi_reg_write((u32)(master->base + reg), data);
Kuninori Morimoto8fc176d2010-01-28 13:46:16 +0900220 spin_unlock_irqrestore(&master->lock, flags);
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900221}
222
Kuninori Morimoto71f6e062009-12-02 15:11:08 +0900223static u32 fsi_master_read(struct fsi_master *master, u32 reg)
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900224{
Kuninori Morimoto8fc176d2010-01-28 13:46:16 +0900225 u32 ret;
226 unsigned long flags;
227
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900228 if ((reg < MREG_START) ||
Kuninori Morimotod7854142010-07-13 12:13:09 +0900229 (reg > MREG_END)) {
230 pr_err("fsi: register access err (%s)\n", __func__);
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900231 return 0;
Kuninori Morimotod7854142010-07-13 12:13:09 +0900232 }
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900233
Kuninori Morimoto8fc176d2010-01-28 13:46:16 +0900234 spin_lock_irqsave(&master->lock, flags);
235 ret = __fsi_reg_read((u32)(master->base + reg));
236 spin_unlock_irqrestore(&master->lock, flags);
237
238 return ret;
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900239}
240
Guennadi Liakhovetski0f69d972010-02-03 17:37:23 +0100241static void fsi_master_mask_set(struct fsi_master *master,
Kuninori Morimoto71f6e062009-12-02 15:11:08 +0900242 u32 reg, u32 mask, u32 data)
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900243{
Kuninori Morimoto8fc176d2010-01-28 13:46:16 +0900244 unsigned long flags;
245
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900246 if ((reg < MREG_START) ||
Kuninori Morimotod7854142010-07-13 12:13:09 +0900247 (reg > MREG_END)) {
248 pr_err("fsi: register access err (%s)\n", __func__);
Guennadi Liakhovetski0f69d972010-02-03 17:37:23 +0100249 return;
Kuninori Morimotod7854142010-07-13 12:13:09 +0900250 }
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900251
Kuninori Morimoto8fc176d2010-01-28 13:46:16 +0900252 spin_lock_irqsave(&master->lock, flags);
Guennadi Liakhovetski0f69d972010-02-03 17:37:23 +0100253 __fsi_reg_mask_set((u32)(master->base + reg), mask, data);
Kuninori Morimoto8fc176d2010-01-28 13:46:16 +0900254 spin_unlock_irqrestore(&master->lock, flags);
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900255}
256
Kuninori Morimotoc8fe2572010-09-17 13:48:17 +0900257/*
258 * basic function
259 */
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900260
Kuninori Morimoto71f6e062009-12-02 15:11:08 +0900261static struct fsi_master *fsi_get_master(struct fsi_priv *fsi)
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900262{
Kuninori Morimoto71f6e062009-12-02 15:11:08 +0900263 return fsi->master;
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900264}
265
266static int fsi_is_port_a(struct fsi_priv *fsi)
267{
Kuninori Morimoto71f6e062009-12-02 15:11:08 +0900268 return fsi->master->base == fsi->base;
269}
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900270
Kuninori Morimoto142e8172009-12-28 14:09:11 +0900271static struct snd_soc_dai *fsi_get_dai(struct snd_pcm_substream *substream)
Kuninori Morimoto71f6e062009-12-02 15:11:08 +0900272{
273 struct snd_soc_pcm_runtime *rtd = substream->private_data;
Kuninori Morimoto142e8172009-12-28 14:09:11 +0900274
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000275 return rtd->cpu_dai;
Kuninori Morimoto142e8172009-12-28 14:09:11 +0900276}
277
278static struct fsi_priv *fsi_get_priv(struct snd_pcm_substream *substream)
279{
280 struct snd_soc_dai *dai = fsi_get_dai(substream);
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000281 struct fsi_master *master = snd_soc_dai_get_drvdata(dai);
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900282
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000283 if (dai->id == 0)
284 return &master->fsia;
285 else
286 return &master->fsib;
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900287}
288
289static u32 fsi_get_info_flags(struct fsi_priv *fsi)
290{
291 int is_porta = fsi_is_port_a(fsi);
Kuninori Morimoto71f6e062009-12-02 15:11:08 +0900292 struct fsi_master *master = fsi_get_master(fsi);
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900293
294 return is_porta ? master->info->porta_flags :
295 master->info->portb_flags;
296}
297
298static int fsi_is_master_mode(struct fsi_priv *fsi, int is_play)
299{
300 u32 mode;
301 u32 flags = fsi_get_info_flags(fsi);
302
303 mode = is_play ? SH_FSI_OUT_SLAVE_MODE : SH_FSI_IN_SLAVE_MODE;
304
305 /* return
306 * 1 : master mode
307 * 0 : slave mode
308 */
309
310 return (mode & flags) != mode;
311}
312
313static u32 fsi_port_ab_io_bit(struct fsi_priv *fsi, int is_play)
314{
315 int is_porta = fsi_is_port_a(fsi);
316 u32 data;
317
318 if (is_porta)
319 data = is_play ? (1 << 0) : (1 << 4);
320 else
321 data = is_play ? (1 << 8) : (1 << 12);
322
323 return data;
324}
325
326static void fsi_stream_push(struct fsi_priv *fsi,
327 struct snd_pcm_substream *substream,
328 u32 buffer_len,
329 u32 period_len)
330{
331 fsi->substream = substream;
Kuninori Morimoto5bfb9ad2010-09-17 13:48:45 +0900332 fsi->buff_len = buffer_len;
333 fsi->buff_offset = 0;
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900334 fsi->period_len = period_len;
Kuninori Morimoto5bfb9ad2010-09-17 13:48:45 +0900335 fsi->period_num = 0;
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900336}
337
338static void fsi_stream_pop(struct fsi_priv *fsi)
339{
340 fsi->substream = NULL;
Kuninori Morimoto5bfb9ad2010-09-17 13:48:45 +0900341 fsi->buff_len = 0;
342 fsi->buff_offset = 0;
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900343 fsi->period_len = 0;
Kuninori Morimoto5bfb9ad2010-09-17 13:48:45 +0900344 fsi->period_num = 0;
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900345}
346
Kuninori Morimoto5bfb9ad2010-09-17 13:48:45 +0900347static int fsi_get_fifo_data_num(struct fsi_priv *fsi, int is_play)
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900348{
349 u32 status;
350 u32 reg = is_play ? DOFF_ST : DIFF_ST;
Kuninori Morimoto5bfb9ad2010-09-17 13:48:45 +0900351 int data_num;
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900352
353 status = fsi_reg_read(fsi, reg);
Kuninori Morimoto5bfb9ad2010-09-17 13:48:45 +0900354 data_num = 0x1ff & (status >> 8);
355 data_num *= fsi->chan_num;
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900356
Kuninori Morimoto5bfb9ad2010-09-17 13:48:45 +0900357 return data_num;
358}
359
360static int fsi_len2num(int len, int width)
361{
362 return len / width;
363}
364
365#define fsi_num2offset(a, b) fsi_num2len(a, b)
366static int fsi_num2len(int num, int width)
367{
368 return num * width;
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900369}
370
Kuninori Morimotob9fde182010-09-17 13:48:32 +0900371/*
372 * dma function
373 */
374
Kuninori Morimotoc79eab32010-09-17 13:48:05 +0900375static u8 *fsi_dma_get_area(struct fsi_priv *fsi)
376{
Kuninori Morimoto5bfb9ad2010-09-17 13:48:45 +0900377 return fsi->substream->runtime->dma_area + fsi->buff_offset;
Kuninori Morimotoc79eab32010-09-17 13:48:05 +0900378}
379
Kuninori Morimoto5bfb9ad2010-09-17 13:48:45 +0900380static void fsi_dma_soft_push16(struct fsi_priv *fsi, int num)
Kuninori Morimotob9fde182010-09-17 13:48:32 +0900381{
382 u16 *start;
383 int i;
384
385 start = (u16 *)fsi_dma_get_area(fsi);
386
Kuninori Morimoto5bfb9ad2010-09-17 13:48:45 +0900387 for (i = 0; i < num; i++)
Kuninori Morimotob9fde182010-09-17 13:48:32 +0900388 fsi_reg_write(fsi, DODT, ((u32)*(start + i) << 8));
389}
390
Kuninori Morimoto5bfb9ad2010-09-17 13:48:45 +0900391static void fsi_dma_soft_pop16(struct fsi_priv *fsi, int num)
Kuninori Morimotob9fde182010-09-17 13:48:32 +0900392{
393 u16 *start;
394 int i;
395
396 start = (u16 *)fsi_dma_get_area(fsi);
397
Kuninori Morimoto5bfb9ad2010-09-17 13:48:45 +0900398 for (i = 0; i < num; i++)
Kuninori Morimotob9fde182010-09-17 13:48:32 +0900399 *(start + i) = (u16)(fsi_reg_read(fsi, DIDT) >> 8);
400}
401
Kuninori Morimoto5bfb9ad2010-09-17 13:48:45 +0900402static void fsi_dma_soft_push32(struct fsi_priv *fsi, int num)
Kuninori Morimotob9fde182010-09-17 13:48:32 +0900403{
404 u32 *start;
405 int i;
406
407 start = (u32 *)fsi_dma_get_area(fsi);
408
Kuninori Morimoto5bfb9ad2010-09-17 13:48:45 +0900409 for (i = 0; i < num; i++)
Kuninori Morimotob9fde182010-09-17 13:48:32 +0900410 fsi_reg_write(fsi, DODT, *(start + i));
411}
412
Kuninori Morimoto5bfb9ad2010-09-17 13:48:45 +0900413static void fsi_dma_soft_pop32(struct fsi_priv *fsi, int num)
Kuninori Morimotob9fde182010-09-17 13:48:32 +0900414{
415 u32 *start;
416 int i;
417
418 start = (u32 *)fsi_dma_get_area(fsi);
419
Kuninori Morimoto5bfb9ad2010-09-17 13:48:45 +0900420 for (i = 0; i < num; i++)
Kuninori Morimotob9fde182010-09-17 13:48:32 +0900421 *(start + i) = fsi_reg_read(fsi, DIDT);
422}
423
Kuninori Morimotoc8fe2572010-09-17 13:48:17 +0900424/*
425 * irq function
426 */
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900427
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900428static void fsi_irq_enable(struct fsi_priv *fsi, int is_play)
429{
430 u32 data = fsi_port_ab_io_bit(fsi, is_play);
Kuninori Morimoto71f6e062009-12-02 15:11:08 +0900431 struct fsi_master *master = fsi_get_master(fsi);
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900432
Kuninori Morimoto73b92c12010-07-13 12:13:04 +0900433 fsi_master_mask_set(master, master->core->imsk, data, data);
434 fsi_master_mask_set(master, master->core->iemsk, data, data);
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900435}
436
437static void fsi_irq_disable(struct fsi_priv *fsi, int is_play)
438{
439 u32 data = fsi_port_ab_io_bit(fsi, is_play);
Kuninori Morimoto71f6e062009-12-02 15:11:08 +0900440 struct fsi_master *master = fsi_get_master(fsi);
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900441
Kuninori Morimoto73b92c12010-07-13 12:13:04 +0900442 fsi_master_mask_set(master, master->core->imsk, data, 0);
443 fsi_master_mask_set(master, master->core->iemsk, data, 0);
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900444}
445
Kuninori Morimoto10ea76c2010-03-23 11:47:54 +0900446static u32 fsi_irq_get_status(struct fsi_master *master)
447{
Kuninori Morimoto73b92c12010-07-13 12:13:04 +0900448 return fsi_master_read(master, master->core->int_st);
Kuninori Morimoto10ea76c2010-03-23 11:47:54 +0900449}
450
451static void fsi_irq_clear_all_status(struct fsi_master *master)
452{
Kuninori Morimoto73b92c12010-07-13 12:13:04 +0900453 fsi_master_write(master, master->core->int_st, 0);
Kuninori Morimoto10ea76c2010-03-23 11:47:54 +0900454}
455
456static void fsi_irq_clear_status(struct fsi_priv *fsi)
457{
458 u32 data = 0;
459 struct fsi_master *master = fsi_get_master(fsi);
460
461 data |= fsi_port_ab_io_bit(fsi, 0);
462 data |= fsi_port_ab_io_bit(fsi, 1);
463
464 /* clear interrupt factor */
Kuninori Morimoto73b92c12010-07-13 12:13:04 +0900465 fsi_master_mask_set(master, master->core->int_st, data, 0);
Kuninori Morimoto10ea76c2010-03-23 11:47:54 +0900466}
467
Kuninori Morimotoc8fe2572010-09-17 13:48:17 +0900468/*
469 * SPDIF master clock function
470 *
471 * These functions are used later FSI2
472 */
Kuninori Morimoto3bc28072010-07-29 16:48:32 +0900473static void fsi_spdif_clk_ctrl(struct fsi_priv *fsi, int enable)
474{
475 struct fsi_master *master = fsi_get_master(fsi);
476 u32 val = BP | SE;
477
478 if (master->core->ver < 2) {
479 pr_err("fsi: register access err (%s)\n", __func__);
480 return;
481 }
482
483 if (enable)
484 fsi_master_mask_set(master, fsi->mst_ctrl, val, val);
485 else
486 fsi_master_mask_set(master, fsi->mst_ctrl, val, 0);
487}
488
Kuninori Morimotoc8fe2572010-09-17 13:48:17 +0900489/*
490 * ctrl function
491 */
Kuninori Morimoto3bc28072010-07-29 16:48:32 +0900492
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900493static void fsi_clk_ctrl(struct fsi_priv *fsi, int enable)
494{
495 u32 val = fsi_is_port_a(fsi) ? (1 << 0) : (1 << 4);
Kuninori Morimoto71f6e062009-12-02 15:11:08 +0900496 struct fsi_master *master = fsi_get_master(fsi);
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900497
498 if (enable)
Kuninori Morimoto71f6e062009-12-02 15:11:08 +0900499 fsi_master_mask_set(master, CLK_RST, val, val);
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900500 else
Kuninori Morimoto71f6e062009-12-02 15:11:08 +0900501 fsi_master_mask_set(master, CLK_RST, val, 0);
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900502}
503
Kuninori Morimoto4a942b42010-03-25 19:15:51 +0900504static void fsi_fifo_init(struct fsi_priv *fsi,
505 int is_play,
506 struct snd_soc_dai *dai)
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900507{
Kuninori Morimoto4a942b42010-03-25 19:15:51 +0900508 struct fsi_master *master = fsi_get_master(fsi);
509 u32 ctrl, shift, i;
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900510
Kuninori Morimoto4a942b42010-03-25 19:15:51 +0900511 /* get on-chip RAM capacity */
512 shift = fsi_master_read(master, FIFO_SZ);
513 shift >>= fsi_is_port_a(fsi) ? AO_SZ_SHIFT : BO_SZ_SHIFT;
514 shift &= OUT_SZ_MASK;
Kuninori Morimoto5bfb9ad2010-09-17 13:48:45 +0900515 fsi->fifo_max_num = 256 << shift;
516 dev_dbg(dai->dev, "fifo = %d words\n", fsi->fifo_max_num);
Kuninori Morimoto4a942b42010-03-25 19:15:51 +0900517
518 /*
519 * The maximum number of sample data varies depending
520 * on the number of channels selected for the format.
521 *
522 * FIFOs are used in 4-channel units in 3-channel mode
523 * and in 8-channel units in 5- to 7-channel mode
524 * meaning that more FIFOs than the required size of DPRAM
525 * are used.
526 *
527 * ex) if 256 words of DP-RAM is connected
528 * 1 channel: 256 (256 x 1 = 256)
529 * 2 channels: 128 (128 x 2 = 256)
530 * 3 channels: 64 ( 64 x 3 = 192)
531 * 4 channels: 64 ( 64 x 4 = 256)
532 * 5 channels: 32 ( 32 x 5 = 160)
533 * 6 channels: 32 ( 32 x 6 = 192)
534 * 7 channels: 32 ( 32 x 7 = 224)
535 * 8 channels: 32 ( 32 x 8 = 256)
536 */
Kuninori Morimoto5bfb9ad2010-09-17 13:48:45 +0900537 for (i = 1; i < fsi->chan_num; i <<= 1)
538 fsi->fifo_max_num >>= 1;
539 dev_dbg(dai->dev, "%d channel %d store\n",
540 fsi->chan_num, fsi->fifo_max_num);
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900541
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900542 ctrl = is_play ? DOFF_CTL : DIFF_CTL;
543
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900544 /* set interrupt generation factor */
545 fsi_reg_write(fsi, ctrl, IRQ_HALF);
546
547 /* clear FIFO */
548 fsi_reg_mask_set(fsi, ctrl, FIFO_CLR, FIFO_CLR);
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900549}
550
Kuninori Morimoto71f6e062009-12-02 15:11:08 +0900551static void fsi_soft_all_reset(struct fsi_master *master)
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900552{
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900553 /* port AB reset */
Kuninori Morimotofeb58cf2010-03-24 15:27:24 +0900554 fsi_master_mask_set(master, SOFT_RST, PASR | PBSR, 0);
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900555 mdelay(10);
556
557 /* soft reset */
Kuninori Morimotofeb58cf2010-03-24 15:27:24 +0900558 fsi_master_mask_set(master, SOFT_RST, FSISR, 0);
559 fsi_master_mask_set(master, SOFT_RST, FSISR, FSISR);
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900560 mdelay(10);
561}
562
Kuninori Morimotod8b33532010-09-17 13:49:05 +0900563static int fsi_fifo_data_ctrl(struct fsi_priv *fsi, int startup, int is_play)
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900564{
565 struct snd_pcm_runtime *runtime;
566 struct snd_pcm_substream *substream = NULL;
Kuninori Morimoto59c3b002009-12-28 14:09:16 +0900567 u32 status;
Kuninori Morimotod8b33532010-09-17 13:49:05 +0900568 u32 status_reg = is_play ? DOFF_ST : DIFF_ST;
569 int data_residue_num;
570 int data_num;
571 int data_num_max;
Kuninori Morimoto5bfb9ad2010-09-17 13:48:45 +0900572 int ch_width;
Kuninori Morimotob9fde182010-09-17 13:48:32 +0900573 int over_period;
Kuninori Morimotod8b33532010-09-17 13:49:05 +0900574 void (*fn)(struct fsi_priv *fsi, int size);
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900575
576 if (!fsi ||
577 !fsi->substream ||
578 !fsi->substream->runtime)
579 return -EINVAL;
580
Kuninori Morimoto1c418d12009-12-28 14:09:05 +0900581 over_period = 0;
582 substream = fsi->substream;
583 runtime = substream->runtime;
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900584
585 /* FSI FIFO has limit.
586 * So, this driver can not send periods data at a time
587 */
Kuninori Morimoto5bfb9ad2010-09-17 13:48:45 +0900588 if (fsi->buff_offset >=
589 fsi_num2offset(fsi->period_num + 1, fsi->period_len)) {
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900590
Kuninori Morimoto1c418d12009-12-28 14:09:05 +0900591 over_period = 1;
Kuninori Morimoto5bfb9ad2010-09-17 13:48:45 +0900592 fsi->period_num = (fsi->period_num + 1) % runtime->periods;
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900593
Kuninori Morimoto5bfb9ad2010-09-17 13:48:45 +0900594 if (0 == fsi->period_num)
595 fsi->buff_offset = 0;
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900596 }
597
598 /* get 1 channel data width */
Kuninori Morimoto5bfb9ad2010-09-17 13:48:45 +0900599 ch_width = frames_to_bytes(runtime, 1) / fsi->chan_num;
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900600
Kuninori Morimotod8b33532010-09-17 13:49:05 +0900601 /* get residue data number of alsa */
602 data_residue_num = fsi_len2num(fsi->buff_len - fsi->buff_offset,
603 ch_width);
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900604
Kuninori Morimotod8b33532010-09-17 13:49:05 +0900605 if (is_play) {
606 /*
607 * for play-back
608 *
609 * data_num_max : number of FSI fifo free space
610 * data_num : number of ALSA residue data
611 */
612 data_num_max = fsi->fifo_max_num * fsi->chan_num;
613 data_num_max -= fsi_get_fifo_data_num(fsi, is_play);
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900614
Kuninori Morimotod8b33532010-09-17 13:49:05 +0900615 data_num = data_residue_num;
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900616
Kuninori Morimotod8b33532010-09-17 13:49:05 +0900617 switch (ch_width) {
618 case 2:
619 fn = fsi_dma_soft_push16;
620 break;
621 case 4:
622 fn = fsi_dma_soft_push32;
623 break;
624 default:
625 return -EINVAL;
626 }
627 } else {
628 /*
629 * for capture
630 *
631 * data_num_max : number of ALSA free space
632 * data_num : number of data in FSI fifo
633 */
634 data_num_max = data_residue_num;
635 data_num = fsi_get_fifo_data_num(fsi, is_play);
636
637 switch (ch_width) {
638 case 2:
639 fn = fsi_dma_soft_pop16;
640 break;
641 case 4:
642 fn = fsi_dma_soft_pop32;
643 break;
644 default:
645 return -EINVAL;
646 }
Kuninori Morimoto9ddc9aa2009-10-30 12:02:39 +0900647 }
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900648
Kuninori Morimotod8b33532010-09-17 13:49:05 +0900649 data_num = min(data_num, data_num_max);
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900650
Kuninori Morimotod8b33532010-09-17 13:49:05 +0900651 fn(fsi, data_num);
652
653 /* update buff_offset */
654 fsi->buff_offset += fsi_num2offset(data_num, ch_width);
655
656 /* check fifo status */
657 status = fsi_reg_read(fsi, status_reg);
Kuninori Morimoto47fc9a02010-02-22 16:41:57 +0900658 if (!startup) {
Kuninori Morimoto59c3b002009-12-28 14:09:16 +0900659 struct snd_soc_dai *dai = fsi_get_dai(substream);
Kuninori Morimoto47fc9a02010-02-22 16:41:57 +0900660
661 if (status & ERR_OVER)
662 dev_err(dai->dev, "over run\n");
663 if (status & ERR_UNDER)
664 dev_err(dai->dev, "under run\n");
Kuninori Morimoto59c3b002009-12-28 14:09:16 +0900665 }
Kuninori Morimotod8b33532010-09-17 13:49:05 +0900666 fsi_reg_write(fsi, status_reg, 0);
Kuninori Morimoto59c3b002009-12-28 14:09:16 +0900667
Kuninori Morimotod8b33532010-09-17 13:49:05 +0900668 /* re-enable irq */
669 fsi_irq_enable(fsi, is_play);
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900670
Kuninori Morimoto1c418d12009-12-28 14:09:05 +0900671 if (over_period)
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900672 snd_pcm_period_elapsed(substream);
673
Kuninori Morimoto47fc9a02010-02-22 16:41:57 +0900674 return 0;
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900675}
676
Kuninori Morimoto47fc9a02010-02-22 16:41:57 +0900677static int fsi_data_pop(struct fsi_priv *fsi, int startup)
Kuninori Morimoto07102f32009-10-30 12:02:44 +0900678{
Kuninori Morimotod8b33532010-09-17 13:49:05 +0900679 return fsi_fifo_data_ctrl(fsi, startup, 0);
680}
Kuninori Morimoto07102f32009-10-30 12:02:44 +0900681
Kuninori Morimotod8b33532010-09-17 13:49:05 +0900682static int fsi_data_push(struct fsi_priv *fsi, int startup)
683{
684 return fsi_fifo_data_ctrl(fsi, startup, 1);
Kuninori Morimoto07102f32009-10-30 12:02:44 +0900685}
686
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900687static irqreturn_t fsi_interrupt(int irq, void *data)
688{
Kuninori Morimoto71f6e062009-12-02 15:11:08 +0900689 struct fsi_master *master = data;
Kuninori Morimoto10ea76c2010-03-23 11:47:54 +0900690 u32 int_st = fsi_irq_get_status(master);
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900691
692 /* clear irq status */
Kuninori Morimotofeb58cf2010-03-24 15:27:24 +0900693 fsi_master_mask_set(master, SOFT_RST, IR, 0);
694 fsi_master_mask_set(master, SOFT_RST, IR, IR);
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900695
696 if (int_st & INT_A_OUT)
Kuninori Morimoto47fc9a02010-02-22 16:41:57 +0900697 fsi_data_push(&master->fsia, 0);
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900698 if (int_st & INT_B_OUT)
Kuninori Morimoto47fc9a02010-02-22 16:41:57 +0900699 fsi_data_push(&master->fsib, 0);
Kuninori Morimoto07102f32009-10-30 12:02:44 +0900700 if (int_st & INT_A_IN)
Kuninori Morimoto47fc9a02010-02-22 16:41:57 +0900701 fsi_data_pop(&master->fsia, 0);
Kuninori Morimoto07102f32009-10-30 12:02:44 +0900702 if (int_st & INT_B_IN)
Kuninori Morimoto47fc9a02010-02-22 16:41:57 +0900703 fsi_data_pop(&master->fsib, 0);
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900704
Kuninori Morimoto10ea76c2010-03-23 11:47:54 +0900705 fsi_irq_clear_all_status(master);
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900706
707 return IRQ_HANDLED;
708}
709
Kuninori Morimotoc8fe2572010-09-17 13:48:17 +0900710/*
711 * dai ops
712 */
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900713
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900714static int fsi_dai_startup(struct snd_pcm_substream *substream,
715 struct snd_soc_dai *dai)
716{
Kuninori Morimoto71f6e062009-12-02 15:11:08 +0900717 struct fsi_priv *fsi = fsi_get_priv(substream);
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900718 u32 flags = fsi_get_info_flags(fsi);
Kuninori Morimoto3bc28072010-07-29 16:48:32 +0900719 struct fsi_master *master = fsi_get_master(fsi);
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900720 u32 fmt;
721 u32 reg;
722 u32 data;
723 int is_play = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK);
724 int is_master;
725 int ret = 0;
726
Kuninori Morimoto785d1c42009-11-30 20:24:48 +0900727 pm_runtime_get_sync(dai->dev);
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900728
729 /* CKG1 */
730 data = is_play ? (1 << 0) : (1 << 4);
731 is_master = fsi_is_master_mode(fsi, is_play);
732 if (is_master)
733 fsi_reg_mask_set(fsi, CKG1, data, data);
734 else
735 fsi_reg_mask_set(fsi, CKG1, data, 0);
736
737 /* clock inversion (CKG2) */
738 data = 0;
Kuninori Morimotob427b442010-07-13 12:01:15 +0900739 if (SH_FSI_LRM_INV & flags)
740 data |= 1 << 12;
741 if (SH_FSI_BRM_INV & flags)
742 data |= 1 << 8;
743 if (SH_FSI_LRS_INV & flags)
744 data |= 1 << 4;
745 if (SH_FSI_BRS_INV & flags)
746 data |= 1 << 0;
747
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900748 fsi_reg_write(fsi, CKG2, data);
749
750 /* do fmt, di fmt */
751 data = 0;
752 reg = is_play ? DO_FMT : DI_FMT;
753 fmt = is_play ? SH_FSI_GET_OFMT(flags) : SH_FSI_GET_IFMT(flags);
754 switch (fmt) {
755 case SH_FSI_FMT_MONO:
Kuninori Morimotoa7ffb522010-07-13 12:13:00 +0900756 data = CR_MONO;
Kuninori Morimoto5bfb9ad2010-09-17 13:48:45 +0900757 fsi->chan_num = 1;
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900758 break;
759 case SH_FSI_FMT_MONO_DELAY:
Kuninori Morimotoa7ffb522010-07-13 12:13:00 +0900760 data = CR_MONO_D;
Kuninori Morimoto5bfb9ad2010-09-17 13:48:45 +0900761 fsi->chan_num = 1;
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900762 break;
763 case SH_FSI_FMT_PCM:
Kuninori Morimotoa7ffb522010-07-13 12:13:00 +0900764 data = CR_PCM;
Kuninori Morimoto5bfb9ad2010-09-17 13:48:45 +0900765 fsi->chan_num = 2;
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900766 break;
767 case SH_FSI_FMT_I2S:
Kuninori Morimotoa7ffb522010-07-13 12:13:00 +0900768 data = CR_I2S;
Kuninori Morimoto5bfb9ad2010-09-17 13:48:45 +0900769 fsi->chan_num = 2;
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900770 break;
771 case SH_FSI_FMT_TDM:
Kuninori Morimoto5bfb9ad2010-09-17 13:48:45 +0900772 fsi->chan_num = is_play ?
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900773 SH_FSI_GET_CH_O(flags) : SH_FSI_GET_CH_I(flags);
Kuninori Morimoto5bfb9ad2010-09-17 13:48:45 +0900774 data = CR_TDM | (fsi->chan_num - 1);
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900775 break;
776 case SH_FSI_FMT_TDM_DELAY:
Kuninori Morimoto5bfb9ad2010-09-17 13:48:45 +0900777 fsi->chan_num = is_play ?
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900778 SH_FSI_GET_CH_O(flags) : SH_FSI_GET_CH_I(flags);
Kuninori Morimoto5bfb9ad2010-09-17 13:48:45 +0900779 data = CR_TDM_D | (fsi->chan_num - 1);
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900780 break;
Kuninori Morimoto3bc28072010-07-29 16:48:32 +0900781 case SH_FSI_FMT_SPDIF:
782 if (master->core->ver < 2) {
783 dev_err(dai->dev, "This FSI can not use SPDIF\n");
784 return -EINVAL;
785 }
786 data = CR_SPDIF;
Kuninori Morimoto5bfb9ad2010-09-17 13:48:45 +0900787 fsi->chan_num = 2;
Kuninori Morimoto3bc28072010-07-29 16:48:32 +0900788 fsi_spdif_clk_ctrl(fsi, 1);
789 fsi_reg_mask_set(fsi, OUT_SEL, 0x0010, 0x0010);
790 break;
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900791 default:
792 dev_err(dai->dev, "unknown format.\n");
793 return -EINVAL;
794 }
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900795 fsi_reg_write(fsi, reg, data);
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900796
Kuninori Morimoto10ea76c2010-03-23 11:47:54 +0900797 /* irq clear */
798 fsi_irq_disable(fsi, is_play);
799 fsi_irq_clear_status(fsi);
800
801 /* fifo init */
Kuninori Morimoto4a942b42010-03-25 19:15:51 +0900802 fsi_fifo_init(fsi, is_play, dai);
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900803
804 return ret;
805}
806
807static void fsi_dai_shutdown(struct snd_pcm_substream *substream,
808 struct snd_soc_dai *dai)
809{
Kuninori Morimoto71f6e062009-12-02 15:11:08 +0900810 struct fsi_priv *fsi = fsi_get_priv(substream);
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900811 int is_play = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
812
813 fsi_irq_disable(fsi, is_play);
814 fsi_clk_ctrl(fsi, 0);
815
Kuninori Morimoto785d1c42009-11-30 20:24:48 +0900816 pm_runtime_put_sync(dai->dev);
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900817}
818
819static int fsi_dai_trigger(struct snd_pcm_substream *substream, int cmd,
820 struct snd_soc_dai *dai)
821{
Kuninori Morimoto71f6e062009-12-02 15:11:08 +0900822 struct fsi_priv *fsi = fsi_get_priv(substream);
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900823 struct snd_pcm_runtime *runtime = substream->runtime;
824 int is_play = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
825 int ret = 0;
826
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900827 switch (cmd) {
828 case SNDRV_PCM_TRIGGER_START:
829 fsi_stream_push(fsi, substream,
830 frames_to_bytes(runtime, runtime->buffer_size),
831 frames_to_bytes(runtime, runtime->period_size));
Kuninori Morimoto47fc9a02010-02-22 16:41:57 +0900832 ret = is_play ? fsi_data_push(fsi, 1) : fsi_data_pop(fsi, 1);
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900833 break;
834 case SNDRV_PCM_TRIGGER_STOP:
835 fsi_irq_disable(fsi, is_play);
836 fsi_stream_pop(fsi);
837 break;
838 }
839
840 return ret;
841}
842
Kuninori Morimotoccad7b42010-07-13 12:13:14 +0900843static int fsi_dai_hw_params(struct snd_pcm_substream *substream,
844 struct snd_pcm_hw_params *params,
845 struct snd_soc_dai *dai)
846{
847 struct fsi_priv *fsi = fsi_get_priv(substream);
848 struct fsi_master *master = fsi_get_master(fsi);
849 int (*set_rate)(int is_porta, int rate) = master->info->set_rate;
850 int fsi_ver = master->core->ver;
851 int is_play = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK);
852 int ret;
853
854 /* if slave mode, set_rate is not needed */
855 if (!fsi_is_master_mode(fsi, is_play))
856 return 0;
857
858 /* it is error if no set_rate */
859 if (!set_rate)
860 return -EIO;
861
Kuninori Morimotoccad7b42010-07-13 12:13:14 +0900862 ret = set_rate(fsi_is_port_a(fsi), params_rate(params));
863 if (ret > 0) {
864 u32 data = 0;
865
866 switch (ret & SH_FSI_ACKMD_MASK) {
867 default:
868 /* FALL THROUGH */
869 case SH_FSI_ACKMD_512:
870 data |= (0x0 << 12);
871 break;
872 case SH_FSI_ACKMD_256:
873 data |= (0x1 << 12);
874 break;
875 case SH_FSI_ACKMD_128:
876 data |= (0x2 << 12);
877 break;
878 case SH_FSI_ACKMD_64:
879 data |= (0x3 << 12);
880 break;
881 case SH_FSI_ACKMD_32:
882 if (fsi_ver < 2)
883 dev_err(dai->dev, "unsupported ACKMD\n");
884 else
885 data |= (0x4 << 12);
886 break;
887 }
888
889 switch (ret & SH_FSI_BPFMD_MASK) {
890 default:
891 /* FALL THROUGH */
892 case SH_FSI_BPFMD_32:
893 data |= (0x0 << 8);
894 break;
895 case SH_FSI_BPFMD_64:
896 data |= (0x1 << 8);
897 break;
898 case SH_FSI_BPFMD_128:
899 data |= (0x2 << 8);
900 break;
901 case SH_FSI_BPFMD_256:
902 data |= (0x3 << 8);
903 break;
904 case SH_FSI_BPFMD_512:
905 data |= (0x4 << 8);
906 break;
907 case SH_FSI_BPFMD_16:
908 if (fsi_ver < 2)
909 dev_err(dai->dev, "unsupported ACKMD\n");
910 else
911 data |= (0x7 << 8);
912 break;
913 }
914
915 fsi_reg_mask_set(fsi, CKG1, (ACKMD_MASK | BPFMD_MASK) , data);
916 udelay(10);
917 fsi_clk_ctrl(fsi, 1);
918 ret = 0;
919 }
Kuninori Morimotoccad7b42010-07-13 12:13:14 +0900920
921 return ret;
922
923}
924
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900925static struct snd_soc_dai_ops fsi_dai_ops = {
926 .startup = fsi_dai_startup,
927 .shutdown = fsi_dai_shutdown,
928 .trigger = fsi_dai_trigger,
Kuninori Morimotoccad7b42010-07-13 12:13:14 +0900929 .hw_params = fsi_dai_hw_params,
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900930};
931
Kuninori Morimotoc8fe2572010-09-17 13:48:17 +0900932/*
933 * pcm ops
934 */
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900935
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900936static struct snd_pcm_hardware fsi_pcm_hardware = {
937 .info = SNDRV_PCM_INFO_INTERLEAVED |
938 SNDRV_PCM_INFO_MMAP |
939 SNDRV_PCM_INFO_MMAP_VALID |
940 SNDRV_PCM_INFO_PAUSE,
941 .formats = FSI_FMTS,
942 .rates = FSI_RATES,
943 .rate_min = 8000,
944 .rate_max = 192000,
945 .channels_min = 1,
946 .channels_max = 2,
947 .buffer_bytes_max = 64 * 1024,
948 .period_bytes_min = 32,
949 .period_bytes_max = 8192,
950 .periods_min = 1,
951 .periods_max = 32,
952 .fifo_size = 256,
953};
954
955static int fsi_pcm_open(struct snd_pcm_substream *substream)
956{
957 struct snd_pcm_runtime *runtime = substream->runtime;
958 int ret = 0;
959
960 snd_soc_set_runtime_hwparams(substream, &fsi_pcm_hardware);
961
962 ret = snd_pcm_hw_constraint_integer(runtime,
963 SNDRV_PCM_HW_PARAM_PERIODS);
964
965 return ret;
966}
967
968static int fsi_hw_params(struct snd_pcm_substream *substream,
969 struct snd_pcm_hw_params *hw_params)
970{
971 return snd_pcm_lib_malloc_pages(substream,
972 params_buffer_bytes(hw_params));
973}
974
975static int fsi_hw_free(struct snd_pcm_substream *substream)
976{
977 return snd_pcm_lib_free_pages(substream);
978}
979
980static snd_pcm_uframes_t fsi_pointer(struct snd_pcm_substream *substream)
981{
982 struct snd_pcm_runtime *runtime = substream->runtime;
Kuninori Morimoto71f6e062009-12-02 15:11:08 +0900983 struct fsi_priv *fsi = fsi_get_priv(substream);
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900984 long location;
985
Kuninori Morimoto5bfb9ad2010-09-17 13:48:45 +0900986 location = (fsi->buff_offset - 1);
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +0900987 if (location < 0)
988 location = 0;
989
990 return bytes_to_frames(runtime, location);
991}
992
993static struct snd_pcm_ops fsi_pcm_ops = {
994 .open = fsi_pcm_open,
995 .ioctl = snd_pcm_lib_ioctl,
996 .hw_params = fsi_hw_params,
997 .hw_free = fsi_hw_free,
998 .pointer = fsi_pointer,
999};
1000
Kuninori Morimotoc8fe2572010-09-17 13:48:17 +09001001/*
1002 * snd_soc_platform
1003 */
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +09001004
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +09001005#define PREALLOC_BUFFER (32 * 1024)
1006#define PREALLOC_BUFFER_MAX (32 * 1024)
1007
1008static void fsi_pcm_free(struct snd_pcm *pcm)
1009{
1010 snd_pcm_lib_preallocate_free_for_all(pcm);
1011}
1012
1013static int fsi_pcm_new(struct snd_card *card,
1014 struct snd_soc_dai *dai,
1015 struct snd_pcm *pcm)
1016{
1017 /*
1018 * dont use SNDRV_DMA_TYPE_DEV, since it will oops the SH kernel
1019 * in MMAP mode (i.e. aplay -M)
1020 */
1021 return snd_pcm_lib_preallocate_pages_for_all(
1022 pcm,
1023 SNDRV_DMA_TYPE_CONTINUOUS,
1024 snd_dma_continuous_data(GFP_KERNEL),
1025 PREALLOC_BUFFER, PREALLOC_BUFFER_MAX);
1026}
1027
Kuninori Morimotoc8fe2572010-09-17 13:48:17 +09001028/*
1029 * alsa struct
1030 */
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +09001031
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +00001032static struct snd_soc_dai_driver fsi_soc_dai[] = {
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +09001033 {
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +00001034 .name = "fsia-dai",
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +09001035 .playback = {
1036 .rates = FSI_RATES,
1037 .formats = FSI_FMTS,
1038 .channels_min = 1,
1039 .channels_max = 8,
1040 },
Kuninori Morimoto07102f32009-10-30 12:02:44 +09001041 .capture = {
1042 .rates = FSI_RATES,
1043 .formats = FSI_FMTS,
1044 .channels_min = 1,
1045 .channels_max = 8,
1046 },
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +09001047 .ops = &fsi_dai_ops,
1048 },
1049 {
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +00001050 .name = "fsib-dai",
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +09001051 .playback = {
1052 .rates = FSI_RATES,
1053 .formats = FSI_FMTS,
1054 .channels_min = 1,
1055 .channels_max = 8,
1056 },
Kuninori Morimoto07102f32009-10-30 12:02:44 +09001057 .capture = {
1058 .rates = FSI_RATES,
1059 .formats = FSI_FMTS,
1060 .channels_min = 1,
1061 .channels_max = 8,
1062 },
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +09001063 .ops = &fsi_dai_ops,
1064 },
1065};
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +09001066
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +00001067static struct snd_soc_platform_driver fsi_soc_platform = {
1068 .ops = &fsi_pcm_ops,
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +09001069 .pcm_new = fsi_pcm_new,
1070 .pcm_free = fsi_pcm_free,
1071};
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +09001072
Kuninori Morimotoc8fe2572010-09-17 13:48:17 +09001073/*
1074 * platform function
1075 */
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +09001076
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +09001077static int fsi_probe(struct platform_device *pdev)
1078{
Kuninori Morimoto71f6e062009-12-02 15:11:08 +09001079 struct fsi_master *master;
Kuninori Morimotocc780d32010-03-25 19:15:53 +09001080 const struct platform_device_id *id_entry;
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +09001081 struct resource *res;
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +09001082 unsigned int irq;
1083 int ret;
1084
Kuninori Morimotocc780d32010-03-25 19:15:53 +09001085 id_entry = pdev->id_entry;
1086 if (!id_entry) {
1087 dev_err(&pdev->dev, "unknown fsi device\n");
1088 return -ENODEV;
1089 }
1090
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +09001091 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1092 irq = platform_get_irq(pdev, 0);
Uwe Kleine-Königb6aa1792009-12-16 17:10:09 +01001093 if (!res || (int)irq <= 0) {
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +09001094 dev_err(&pdev->dev, "Not enough FSI platform resources.\n");
1095 ret = -ENODEV;
1096 goto exit;
1097 }
1098
1099 master = kzalloc(sizeof(*master), GFP_KERNEL);
1100 if (!master) {
1101 dev_err(&pdev->dev, "Could not allocate master\n");
1102 ret = -ENOMEM;
1103 goto exit;
1104 }
1105
1106 master->base = ioremap_nocache(res->start, resource_size(res));
1107 if (!master->base) {
1108 ret = -ENXIO;
1109 dev_err(&pdev->dev, "Unable to ioremap FSI registers.\n");
1110 goto exit_kfree;
1111 }
1112
Kuninori Morimoto3bc28072010-07-29 16:48:32 +09001113 /* master setting */
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +09001114 master->irq = irq;
1115 master->info = pdev->dev.platform_data;
Kuninori Morimoto73b92c12010-07-13 12:13:04 +09001116 master->core = (struct fsi_core *)id_entry->driver_data;
Kuninori Morimoto8fc176d2010-01-28 13:46:16 +09001117 spin_lock_init(&master->lock);
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +09001118
Kuninori Morimoto3bc28072010-07-29 16:48:32 +09001119 /* FSI A setting */
1120 master->fsia.base = master->base;
1121 master->fsia.master = master;
1122 master->fsia.mst_ctrl = A_MST_CTLR;
1123
1124 /* FSI B setting */
1125 master->fsib.base = master->base + 0x40;
1126 master->fsib.master = master;
1127 master->fsib.mst_ctrl = B_MST_CTLR;
1128
Kuninori Morimoto785d1c42009-11-30 20:24:48 +09001129 pm_runtime_enable(&pdev->dev);
1130 pm_runtime_resume(&pdev->dev);
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +00001131 dev_set_drvdata(&pdev->dev, master);
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +09001132
Kuninori Morimoto71f6e062009-12-02 15:11:08 +09001133 fsi_soft_all_reset(master);
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +09001134
Kuninori Morimotocc780d32010-03-25 19:15:53 +09001135 ret = request_irq(irq, &fsi_interrupt, IRQF_DISABLED,
1136 id_entry->name, master);
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +09001137 if (ret) {
1138 dev_err(&pdev->dev, "irq request err\n");
Kuninori Morimoto9ddc9aa2009-10-30 12:02:39 +09001139 goto exit_iounmap;
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +09001140 }
1141
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +00001142 ret = snd_soc_register_platform(&pdev->dev, &fsi_soc_platform);
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +09001143 if (ret < 0) {
1144 dev_err(&pdev->dev, "cannot snd soc register\n");
1145 goto exit_free_irq;
1146 }
1147
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +00001148 return snd_soc_register_dais(&pdev->dev, fsi_soc_dai, ARRAY_SIZE(fsi_soc_dai));
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +09001149
1150exit_free_irq:
1151 free_irq(irq, master);
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +09001152exit_iounmap:
1153 iounmap(master->base);
Kuninori Morimoto785d1c42009-11-30 20:24:48 +09001154 pm_runtime_disable(&pdev->dev);
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +09001155exit_kfree:
1156 kfree(master);
1157 master = NULL;
1158exit:
1159 return ret;
1160}
1161
1162static int fsi_remove(struct platform_device *pdev)
1163{
Kuninori Morimoto71f6e062009-12-02 15:11:08 +09001164 struct fsi_master *master;
1165
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +00001166 master = dev_get_drvdata(&pdev->dev);
Kuninori Morimoto71f6e062009-12-02 15:11:08 +09001167
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +00001168 snd_soc_unregister_dais(&pdev->dev, ARRAY_SIZE(fsi_soc_dai));
1169 snd_soc_unregister_platform(&pdev->dev);
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +09001170
Kuninori Morimoto785d1c42009-11-30 20:24:48 +09001171 pm_runtime_disable(&pdev->dev);
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +09001172
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +09001173 free_irq(master->irq, master);
1174
1175 iounmap(master->base);
1176 kfree(master);
Kuninori Morimoto71f6e062009-12-02 15:11:08 +09001177
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +09001178 return 0;
1179}
1180
Kuninori Morimoto785d1c42009-11-30 20:24:48 +09001181static int fsi_runtime_nop(struct device *dev)
1182{
1183 /* Runtime PM callback shared between ->runtime_suspend()
1184 * and ->runtime_resume(). Simply returns success.
1185 *
1186 * This driver re-initializes all registers after
1187 * pm_runtime_get_sync() anyway so there is no need
1188 * to save and restore registers here.
1189 */
1190 return 0;
1191}
1192
1193static struct dev_pm_ops fsi_pm_ops = {
1194 .runtime_suspend = fsi_runtime_nop,
1195 .runtime_resume = fsi_runtime_nop,
1196};
1197
Kuninori Morimoto73b92c12010-07-13 12:13:04 +09001198static struct fsi_core fsi1_core = {
1199 .ver = 1,
1200
1201 /* Interrupt */
Kuninori Morimotocc780d32010-03-25 19:15:53 +09001202 .int_st = INT_ST,
1203 .iemsk = IEMSK,
1204 .imsk = IMSK,
1205};
1206
Kuninori Morimoto73b92c12010-07-13 12:13:04 +09001207static struct fsi_core fsi2_core = {
1208 .ver = 2,
1209
1210 /* Interrupt */
Kuninori Morimotocc780d32010-03-25 19:15:53 +09001211 .int_st = CPU_INT_ST,
1212 .iemsk = CPU_IEMSK,
1213 .imsk = CPU_IMSK,
1214};
1215
1216static struct platform_device_id fsi_id_table[] = {
Kuninori Morimoto73b92c12010-07-13 12:13:04 +09001217 { "sh_fsi", (kernel_ulong_t)&fsi1_core },
1218 { "sh_fsi2", (kernel_ulong_t)&fsi2_core },
Guennadi Liakhovetski05c69452010-10-05 17:54:28 +02001219 {},
Kuninori Morimotocc780d32010-03-25 19:15:53 +09001220};
Dzianis Kahanovichd85a6d72010-09-17 16:42:05 +03001221MODULE_DEVICE_TABLE(platform, fsi_id_table);
Kuninori Morimotocc780d32010-03-25 19:15:53 +09001222
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +09001223static struct platform_driver fsi_driver = {
1224 .driver = {
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +00001225 .name = "fsi-pcm-audio",
Kuninori Morimoto785d1c42009-11-30 20:24:48 +09001226 .pm = &fsi_pm_ops,
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +09001227 },
1228 .probe = fsi_probe,
1229 .remove = fsi_remove,
Kuninori Morimotocc780d32010-03-25 19:15:53 +09001230 .id_table = fsi_id_table,
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +09001231};
1232
1233static int __init fsi_mobile_init(void)
1234{
1235 return platform_driver_register(&fsi_driver);
1236}
1237
1238static void __exit fsi_mobile_exit(void)
1239{
1240 platform_driver_unregister(&fsi_driver);
1241}
Dzianis Kahanovichd85a6d72010-09-17 16:42:05 +03001242
Kuninori Morimotoa4d7d552009-08-20 21:01:05 +09001243module_init(fsi_mobile_init);
1244module_exit(fsi_mobile_exit);
1245
1246MODULE_LICENSE("GPL");
1247MODULE_DESCRIPTION("SuperH onchip FSI audio driver");
1248MODULE_AUTHOR("Kuninori Morimoto <morimoto.kuninori@renesas.com>");