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Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001/*
2 * Driver for DBRI sound chip found on Sparcs.
Martin Habets43388292005-09-10 15:39:00 +02003 * Copyright (C) 2004, 2005 Martin Habets (mhabets@users.sourceforge.net)
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02004 *
Krzysztof Helt1be54c82006-08-21 19:30:57 +02005 * Converted to ring buffered version by Krzysztof Helt (krzysztof.h1@wp.pl)
6 *
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02007 * Based entirely upon drivers/sbus/audio/dbri.c which is:
8 * Copyright (C) 1997 Rudolf Koenig (rfkoenig@immd4.informatik.uni-erlangen.de)
9 * Copyright (C) 1998, 1999 Brent Baccala (baccala@freesoft.org)
10 *
Krzysztof Helt098ccbc2007-08-20 12:30:54 +020011 * This is the low level driver for the DBRI & MMCODEC duo used for ISDN & AUDIO
12 * on Sun SPARCStation 10, 20, LX and Voyager models.
Takashi Iwai1bd9deb2005-06-30 18:26:20 +020013 *
14 * - DBRI: AT&T T5900FX Dual Basic Rates ISDN Interface. It is a 32 channel
15 * data time multiplexer with ISDN support (aka T7259)
16 * Interfaces: SBus,ISDN NT & TE, CHI, 4 bits parallel.
17 * CHI: (spelled ki) Concentration Highway Interface (AT&T or Intel bus ?).
18 * Documentation:
Krzysztof Helt098ccbc2007-08-20 12:30:54 +020019 * - "STP 4000SBus Dual Basic Rate ISDN (DBRI) Transceiver" from
Takashi Iwai1bd9deb2005-06-30 18:26:20 +020020 * Sparc Technology Business (courtesy of Sun Support)
21 * - Data sheet of the T7903, a newer but very similar ISA bus equivalent
Krzysztof Helt098ccbc2007-08-20 12:30:54 +020022 * available from the Lucent (formerly AT&T microelectronics) home
Takashi Iwai1bd9deb2005-06-30 18:26:20 +020023 * page.
24 * - http://www.freesoft.org/Linux/DBRI/
25 * - MMCODEC: Crystal Semiconductor CS4215 16 bit Multimedia Audio Codec
26 * Interfaces: CHI, Audio In & Out, 2 bits parallel
27 * Documentation: from the Crystal Semiconductor home page.
28 *
29 * The DBRI is a 32 pipe machine, each pipe can transfer some bits between
Krzysztof Helt098ccbc2007-08-20 12:30:54 +020030 * memory and a serial device (long pipes, no. 0-15) or between two serial
31 * devices (short pipes, no. 16-31), or simply send a fixed data to a serial
Takashi Iwai1bd9deb2005-06-30 18:26:20 +020032 * device (short pipes).
Krzysztof Helt098ccbc2007-08-20 12:30:54 +020033 * A timeslot defines the bit-offset and no. of bits read from a serial device.
Takashi Iwai1bd9deb2005-06-30 18:26:20 +020034 * The timeslots are linked to 6 circular lists, one for each direction for
35 * each serial device (NT,TE,CHI). A timeslot is associated to 1 or 2 pipes
36 * (the second one is a monitor/tee pipe, valid only for serial input).
37 *
38 * The mmcodec is connected via the CHI bus and needs the data & some
Krzysztof Helt098ccbc2007-08-20 12:30:54 +020039 * parameters (volume, output selection) time multiplexed in 8 byte
Takashi Iwai1bd9deb2005-06-30 18:26:20 +020040 * chunks. It also has a control mode, which serves for audio format setting.
41 *
42 * Looking at the CS4215 data sheet it is easy to set up 2 or 4 codecs on
Krzysztof Helt098ccbc2007-08-20 12:30:54 +020043 * the same CHI bus, so I thought perhaps it is possible to use the on-board
44 * & the speakerbox codec simultaneously, giving 2 (not very independent :-)
Takashi Iwai1bd9deb2005-06-30 18:26:20 +020045 * audio devices. But the SUN HW group decided against it, at least on my
46 * LX the speakerbox connector has at least 1 pin missing and 1 wrongly
47 * connected.
Martin Habets43388292005-09-10 15:39:00 +020048 *
49 * I've tried to stick to the following function naming conventions:
50 * snd_* ALSA stuff
Adrian Bunkd254c8f2006-06-30 18:29:51 +020051 * cs4215_* CS4215 codec specific stuff
Martin Habets43388292005-09-10 15:39:00 +020052 * dbri_* DBRI high-level stuff
53 * other DBRI low-level stuff
Takashi Iwai1bd9deb2005-06-30 18:26:20 +020054 */
55
Takashi Iwai1bd9deb2005-06-30 18:26:20 +020056#include <linux/interrupt.h>
57#include <linux/delay.h>
Krzysztof Helt098ccbc2007-08-20 12:30:54 +020058#include <linux/irq.h>
59#include <linux/io.h>
David S. Miller738f2b72008-08-27 18:09:11 -070060#include <linux/dma-mapping.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090061#include <linux/gfp.h>
Takashi Iwai1bd9deb2005-06-30 18:26:20 +020062
63#include <sound/core.h>
64#include <sound/pcm.h>
65#include <sound/pcm_params.h>
66#include <sound/info.h>
67#include <sound/control.h>
68#include <sound/initval.h>
69
Krzysztof Heltef285fe2007-09-06 15:02:33 +020070#include <linux/of.h>
David S. Miller2bd320f2008-08-27 00:30:59 -070071#include <linux/of_device.h>
Arun Sharma600634972011-07-26 16:09:06 -070072#include <linux/atomic.h>
Paul Gortmakerda155d52011-07-15 12:38:28 -040073#include <linux/module.h>
Takashi Iwai1bd9deb2005-06-30 18:26:20 +020074
75MODULE_AUTHOR("Rudolf Koenig, Brent Baccala and Martin Habets");
76MODULE_DESCRIPTION("Sun DBRI");
77MODULE_LICENSE("GPL");
78MODULE_SUPPORTED_DEVICE("{{Sun,DBRI}}");
79
80static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */
81static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */
Krzysztof Helt098ccbc2007-08-20 12:30:54 +020082/* Enable this card */
Rusty Russella67ff6a2011-12-15 13:49:36 +103083static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +020084
85module_param_array(index, int, NULL, 0444);
86MODULE_PARM_DESC(index, "Index value for Sun DBRI soundcard.");
87module_param_array(id, charp, NULL, 0444);
88MODULE_PARM_DESC(id, "ID string for Sun DBRI soundcard.");
89module_param_array(enable, bool, NULL, 0444);
90MODULE_PARM_DESC(enable, "Enable Sun DBRI soundcard.");
91
Krzysztof Heltab93c7a2006-08-23 11:37:36 +020092#undef DBRI_DEBUG
Takashi Iwai1bd9deb2005-06-30 18:26:20 +020093
94#define D_INT (1<<0)
95#define D_GEN (1<<1)
96#define D_CMD (1<<2)
97#define D_MM (1<<3)
98#define D_USR (1<<4)
99#define D_DESC (1<<5)
100
Takashi Iwai6581f4e2006-05-17 17:14:51 +0200101static int dbri_debug;
Martin Habets43388292005-09-10 15:39:00 +0200102module_param(dbri_debug, int, 0644);
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200103MODULE_PARM_DESC(dbri_debug, "Debug value for Sun DBRI soundcard.");
104
105#ifdef DBRI_DEBUG
106static char *cmds[] = {
107 "WAIT", "PAUSE", "JUMP", "IIQ", "REX", "SDP", "CDP", "DTS",
108 "SSP", "CHI", "NT", "TE", "CDEC", "TEST", "CDM", "RESRV"
109};
110
Krzysztof Helt098ccbc2007-08-20 12:30:54 +0200111#define dprintk(a, x...) if (dbri_debug & a) printk(KERN_DEBUG x)
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200112
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200113#else
Krzysztof Heltaaad3652006-08-28 12:59:23 +0200114#define dprintk(a, x...) do { } while (0)
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200115
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200116#endif /* DBRI_DEBUG */
117
Krzysztof Helt42fe7642006-08-16 12:53:34 +0200118#define DBRI_CMD(cmd, intr, value) ((cmd << 28) | \
119 (intr << 27) | \
120 value)
121
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200122/***************************************************************************
123 CS4215 specific definitions and structures
124****************************************************************************/
125
126struct cs4215 {
127 __u8 data[4]; /* Data mode: Time slots 5-8 */
128 __u8 ctrl[4]; /* Ctrl mode: Time slots 1-4 */
129 __u8 onboard;
130 __u8 offset; /* Bit offset from frame sync to time slot 1 */
131 volatile __u32 status;
132 volatile __u32 version;
133 __u8 precision; /* In bits, either 8 or 16 */
134 __u8 channels; /* 1 or 2 */
135};
136
137/*
Krzysztof Helt098ccbc2007-08-20 12:30:54 +0200138 * Control mode first
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200139 */
140
141/* Time Slot 1, Status register */
142#define CS4215_CLB (1<<2) /* Control Latch Bit */
143#define CS4215_OLB (1<<3) /* 1: line: 2.0V, speaker 4V */
144 /* 0: line: 2.8V, speaker 8V */
145#define CS4215_MLB (1<<4) /* 1: Microphone: 20dB gain disabled */
146#define CS4215_RSRVD_1 (1<<5)
147
148/* Time Slot 2, Data Format Register */
149#define CS4215_DFR_LINEAR16 0
150#define CS4215_DFR_ULAW 1
151#define CS4215_DFR_ALAW 2
152#define CS4215_DFR_LINEAR8 3
153#define CS4215_DFR_STEREO (1<<2)
154static struct {
155 unsigned short freq;
156 unsigned char xtal;
157 unsigned char csval;
158} CS4215_FREQ[] = {
159 { 8000, (1 << 4), (0 << 3) },
160 { 16000, (1 << 4), (1 << 3) },
161 { 27429, (1 << 4), (2 << 3) }, /* Actually 24428.57 */
162 { 32000, (1 << 4), (3 << 3) },
163 /* { NA, (1 << 4), (4 << 3) }, */
164 /* { NA, (1 << 4), (5 << 3) }, */
165 { 48000, (1 << 4), (6 << 3) },
166 { 9600, (1 << 4), (7 << 3) },
Krzysztof Heltab93c7a2006-08-23 11:37:36 +0200167 { 5512, (2 << 4), (0 << 3) }, /* Actually 5512.5 */
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200168 { 11025, (2 << 4), (1 << 3) },
169 { 18900, (2 << 4), (2 << 3) },
170 { 22050, (2 << 4), (3 << 3) },
171 { 37800, (2 << 4), (4 << 3) },
172 { 44100, (2 << 4), (5 << 3) },
173 { 33075, (2 << 4), (6 << 3) },
174 { 6615, (2 << 4), (7 << 3) },
175 { 0, 0, 0}
176};
177
178#define CS4215_HPF (1<<7) /* High Pass Filter, 1: Enabled */
179
180#define CS4215_12_MASK 0xfcbf /* Mask off reserved bits in slot 1 & 2 */
181
182/* Time Slot 3, Serial Port Control register */
183#define CS4215_XEN (1<<0) /* 0: Enable serial output */
184#define CS4215_XCLK (1<<1) /* 1: Master mode: Generate SCLK */
185#define CS4215_BSEL_64 (0<<2) /* Bitrate: 64 bits per frame */
186#define CS4215_BSEL_128 (1<<2)
187#define CS4215_BSEL_256 (2<<2)
188#define CS4215_MCK_MAST (0<<4) /* Master clock */
189#define CS4215_MCK_XTL1 (1<<4) /* 24.576 MHz clock source */
190#define CS4215_MCK_XTL2 (2<<4) /* 16.9344 MHz clock source */
191#define CS4215_MCK_CLK1 (3<<4) /* Clockin, 256 x Fs */
192#define CS4215_MCK_CLK2 (4<<4) /* Clockin, see DFR */
193
194/* Time Slot 4, Test Register */
195#define CS4215_DAD (1<<0) /* 0:Digital-Dig loop, 1:Dig-Analog-Dig loop */
196#define CS4215_ENL (1<<1) /* Enable Loopback Testing */
197
198/* Time Slot 5, Parallel Port Register */
199/* Read only here and the same as the in data mode */
200
201/* Time Slot 6, Reserved */
202
203/* Time Slot 7, Version Register */
204#define CS4215_VERSION_MASK 0xf /* Known versions 0/C, 1/D, 2/E */
205
206/* Time Slot 8, Reserved */
207
208/*
209 * Data mode
210 */
211/* Time Slot 1-2: Left Channel Data, 2-3: Right Channel Data */
212
213/* Time Slot 5, Output Setting */
214#define CS4215_LO(v) v /* Left Output Attenuation 0x3f: -94.5 dB */
215#define CS4215_LE (1<<6) /* Line Out Enable */
216#define CS4215_HE (1<<7) /* Headphone Enable */
217
218/* Time Slot 6, Output Setting */
219#define CS4215_RO(v) v /* Right Output Attenuation 0x3f: -94.5 dB */
220#define CS4215_SE (1<<6) /* Speaker Enable */
221#define CS4215_ADI (1<<7) /* A/D Data Invalid: Busy in calibration */
222
223/* Time Slot 7, Input Setting */
224#define CS4215_LG(v) v /* Left Gain Setting 0xf: 22.5 dB */
225#define CS4215_IS (1<<4) /* Input Select: 1=Microphone, 0=Line */
Krzysztof Helt098ccbc2007-08-20 12:30:54 +0200226#define CS4215_OVR (1<<5) /* 1: Over range condition occurred */
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200227#define CS4215_PIO0 (1<<6) /* Parallel I/O 0 */
228#define CS4215_PIO1 (1<<7)
229
230/* Time Slot 8, Input Setting */
231#define CS4215_RG(v) v /* Right Gain Setting 0xf: 22.5 dB */
232#define CS4215_MA(v) (v<<4) /* Monitor Path Attenuation 0xf: mute */
233
234/***************************************************************************
235 DBRI specific definitions and structures
236****************************************************************************/
237
238/* DBRI main registers */
Krzysztof Heltcf68d212007-09-04 13:09:20 +0200239#define REG0 0x00 /* Status and Control */
240#define REG1 0x04 /* Mode and Interrupt */
241#define REG2 0x08 /* Parallel IO */
242#define REG3 0x0c /* Test */
243#define REG8 0x20 /* Command Queue Pointer */
244#define REG9 0x24 /* Interrupt Queue Pointer */
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200245
246#define DBRI_NO_CMDS 64
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200247#define DBRI_INT_BLK 64
248#define DBRI_NO_DESCS 64
249#define DBRI_NO_PIPES 32
Krzysztof Helt470f1f1a2006-08-21 19:28:16 +0200250#define DBRI_MAX_PIPE (DBRI_NO_PIPES - 1)
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200251
252#define DBRI_REC 0
253#define DBRI_PLAY 1
254#define DBRI_NO_STREAMS 2
255
256/* One transmit/receive descriptor */
Krzysztof Heltc2735442006-08-21 19:27:35 +0200257/* When ba != 0 descriptor is used */
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200258struct dbri_mem {
259 volatile __u32 word1;
Krzysztof Helt16727d92006-08-17 16:59:28 +0200260 __u32 ba; /* Transmit/Receive Buffer Address */
261 __u32 nda; /* Next Descriptor Address */
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200262 volatile __u32 word4;
263};
264
265/* This structure is in a DMA region where it can accessed by both
266 * the CPU and the DBRI
267 */
268struct dbri_dma {
Krzysztof Helt1be54c82006-08-21 19:30:57 +0200269 s32 cmd[DBRI_NO_CMDS]; /* Place for commands */
Krzysztof Helt6fb98282006-08-16 12:54:29 +0200270 volatile s32 intr[DBRI_INT_BLK]; /* Interrupt field */
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200271 struct dbri_mem desc[DBRI_NO_DESCS]; /* Xmit/receive descriptors */
272};
273
274#define dbri_dma_off(member, elem) \
275 ((u32)(unsigned long) \
276 (&(((struct dbri_dma *)0)->member[elem])))
277
278enum in_or_out { PIPEinput, PIPEoutput };
279
280struct dbri_pipe {
281 u32 sdp; /* SDP command word */
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200282 int nextpipe; /* Next pipe in linked list */
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200283 int length; /* Length of timeslot (bits) */
284 int first_desc; /* Index of first descriptor */
285 int desc; /* Index of active descriptor */
286 volatile __u32 *recv_fixed_ptr; /* Ptr to receive fixed data */
287};
288
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200289/* Per stream (playback or record) information */
Takashi Iwai475675d2005-11-17 15:11:51 +0100290struct dbri_streaminfo {
291 struct snd_pcm_substream *substream;
Krzysztof Helt098ccbc2007-08-20 12:30:54 +0200292 u32 dvma_buffer; /* Device view of ALSA DMA buffer */
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200293 int size; /* Size of DMA buffer */
294 size_t offset; /* offset in user buffer */
295 int pipe; /* Data pipe used */
296 int left_gain; /* mixer elements */
297 int right_gain;
Takashi Iwai475675d2005-11-17 15:11:51 +0100298};
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200299
300/* This structure holds the information for both chips (DBRI & CS4215) */
Takashi Iwai475675d2005-11-17 15:11:51 +0100301struct snd_dbri {
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200302 int regs_size, irq; /* Needed for unload */
Grant Likely2dc11582010-08-06 09:25:50 -0600303 struct platform_device *op; /* OF device info */
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200304 spinlock_t lock;
305
Krzysztof Helt16727d92006-08-17 16:59:28 +0200306 struct dbri_dma *dma; /* Pointer to our DMA block */
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200307 u32 dma_dvma; /* DBRI visible DMA address */
308
309 void __iomem *regs; /* dbri HW regs */
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200310 int dbri_irqp; /* intr queue pointer */
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200311
312 struct dbri_pipe pipes[DBRI_NO_PIPES]; /* DBRI's 32 data pipes */
Krzysztof Heltc2735442006-08-21 19:27:35 +0200313 int next_desc[DBRI_NO_DESCS]; /* Index of next desc, or -1 */
Krzysztof Helt1be54c82006-08-21 19:30:57 +0200314 spinlock_t cmdlock; /* Protects cmd queue accesses */
315 s32 *cmdptr; /* Pointer to the last queued cmd */
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200316
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200317 int chi_bpf;
318
319 struct cs4215 mm; /* mmcodec special info */
320 /* per stream (playback/record) info */
321 struct dbri_streaminfo stream_info[DBRI_NO_STREAMS];
Takashi Iwai475675d2005-11-17 15:11:51 +0100322};
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200323
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200324#define DBRI_MAX_VOLUME 63 /* Output volume */
325#define DBRI_MAX_GAIN 15 /* Input gain */
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200326
327/* DBRI Reg0 - Status Control Register - defines. (Page 17) */
328#define D_P (1<<15) /* Program command & queue pointer valid */
329#define D_G (1<<14) /* Allow 4-Word SBus Burst */
330#define D_S (1<<13) /* Allow 16-Word SBus Burst */
331#define D_E (1<<12) /* Allow 8-Word SBus Burst */
332#define D_X (1<<7) /* Sanity Timer Disable */
333#define D_T (1<<6) /* Permit activation of the TE interface */
334#define D_N (1<<5) /* Permit activation of the NT interface */
335#define D_C (1<<4) /* Permit activation of the CHI interface */
336#define D_F (1<<3) /* Force Sanity Timer Time-Out */
337#define D_D (1<<2) /* Disable Master Mode */
338#define D_H (1<<1) /* Halt for Analysis */
339#define D_R (1<<0) /* Soft Reset */
340
341/* DBRI Reg1 - Mode and Interrupt Register - defines. (Page 18) */
342#define D_LITTLE_END (1<<8) /* Byte Order */
343#define D_BIG_END (0<<8) /* Byte Order */
Krzysztof Helt098ccbc2007-08-20 12:30:54 +0200344#define D_MRR (1<<4) /* Multiple Error Ack on SBus (read only) */
345#define D_MLE (1<<3) /* Multiple Late Error on SBus (read only) */
346#define D_LBG (1<<2) /* Lost Bus Grant on SBus (read only) */
347#define D_MBE (1<<1) /* Burst Error on SBus (read only) */
348#define D_IR (1<<0) /* Interrupt Indicator (read only) */
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200349
350/* DBRI Reg2 - Parallel IO Register - defines. (Page 18) */
351#define D_ENPIO3 (1<<7) /* Enable Pin 3 */
352#define D_ENPIO2 (1<<6) /* Enable Pin 2 */
353#define D_ENPIO1 (1<<5) /* Enable Pin 1 */
354#define D_ENPIO0 (1<<4) /* Enable Pin 0 */
355#define D_ENPIO (0xf0) /* Enable all the pins */
356#define D_PIO3 (1<<3) /* Pin 3: 1: Data mode, 0: Ctrl mode */
357#define D_PIO2 (1<<2) /* Pin 2: 1: Onboard PDN */
358#define D_PIO1 (1<<1) /* Pin 1: 0: Reset */
359#define D_PIO0 (1<<0) /* Pin 0: 1: Speakerbox PDN */
360
361/* DBRI Commands (Page 20) */
362#define D_WAIT 0x0 /* Stop execution */
363#define D_PAUSE 0x1 /* Flush long pipes */
364#define D_JUMP 0x2 /* New command queue */
365#define D_IIQ 0x3 /* Initialize Interrupt Queue */
366#define D_REX 0x4 /* Report command execution via interrupt */
367#define D_SDP 0x5 /* Setup Data Pipe */
368#define D_CDP 0x6 /* Continue Data Pipe (reread NULL Pointer) */
369#define D_DTS 0x7 /* Define Time Slot */
370#define D_SSP 0x8 /* Set short Data Pipe */
371#define D_CHI 0x9 /* Set CHI Global Mode */
372#define D_NT 0xa /* NT Command */
373#define D_TE 0xb /* TE Command */
374#define D_CDEC 0xc /* Codec setup */
375#define D_TEST 0xd /* No comment */
376#define D_CDM 0xe /* CHI Data mode command */
377
378/* Special bits for some commands */
Krzysztof Helt098ccbc2007-08-20 12:30:54 +0200379#define D_PIPE(v) ((v)<<0) /* Pipe No.: 0-15 long, 16-21 short */
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200380
381/* Setup Data Pipe */
382/* IRM */
Krzysztof Helt098ccbc2007-08-20 12:30:54 +0200383#define D_SDP_2SAME (1<<18) /* Report 2nd time in a row value received */
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200384#define D_SDP_CHANGE (2<<18) /* Report any changes */
385#define D_SDP_EVERY (3<<18) /* Report any changes */
386#define D_SDP_EOL (1<<17) /* EOL interrupt enable */
387#define D_SDP_IDLE (1<<16) /* HDLC idle interrupt enable */
388
389/* Pipe data MODE */
390#define D_SDP_MEM (0<<13) /* To/from memory */
391#define D_SDP_HDLC (2<<13)
392#define D_SDP_HDLC_D (3<<13) /* D Channel (prio control) */
393#define D_SDP_SER (4<<13) /* Serial to serial */
394#define D_SDP_FIXED (6<<13) /* Short only */
395#define D_SDP_MODE(v) ((v)&(7<<13))
396
397#define D_SDP_TO_SER (1<<12) /* Direction */
398#define D_SDP_FROM_SER (0<<12) /* Direction */
399#define D_SDP_MSB (1<<11) /* Bit order within Byte */
400#define D_SDP_LSB (0<<11) /* Bit order within Byte */
401#define D_SDP_P (1<<10) /* Pointer Valid */
402#define D_SDP_A (1<<8) /* Abort */
403#define D_SDP_C (1<<7) /* Clear */
404
405/* Define Time Slot */
406#define D_DTS_VI (1<<17) /* Valid Input Time-Slot Descriptor */
407#define D_DTS_VO (1<<16) /* Valid Output Time-Slot Descriptor */
408#define D_DTS_INS (1<<15) /* Insert Time Slot */
409#define D_DTS_DEL (0<<15) /* Delete Time Slot */
410#define D_DTS_PRVIN(v) ((v)<<10) /* Previous In Pipe */
411#define D_DTS_PRVOUT(v) ((v)<<5) /* Previous Out Pipe */
412
413/* Time Slot defines */
414#define D_TS_LEN(v) ((v)<<24) /* Number of bits in this time slot */
415#define D_TS_CYCLE(v) ((v)<<14) /* Bit Count at start of TS */
416#define D_TS_DI (1<<13) /* Data Invert */
417#define D_TS_1CHANNEL (0<<10) /* Single Channel / Normal mode */
418#define D_TS_MONITOR (2<<10) /* Monitor pipe */
419#define D_TS_NONCONTIG (3<<10) /* Non contiguous mode */
420#define D_TS_ANCHOR (7<<10) /* Starting short pipes */
421#define D_TS_MON(v) ((v)<<5) /* Monitor Pipe */
Krzysztof Helt098ccbc2007-08-20 12:30:54 +0200422#define D_TS_NEXT(v) ((v)<<0) /* Pipe no.: 0-15 long, 16-21 short */
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200423
424/* Concentration Highway Interface Modes */
425#define D_CHI_CHICM(v) ((v)<<16) /* Clock mode */
426#define D_CHI_IR (1<<15) /* Immediate Interrupt Report */
427#define D_CHI_EN (1<<14) /* CHIL Interrupt enabled */
428#define D_CHI_OD (1<<13) /* Open Drain Enable */
429#define D_CHI_FE (1<<12) /* Sample CHIFS on Rising Frame Edge */
430#define D_CHI_FD (1<<11) /* Frame Drive */
431#define D_CHI_BPF(v) ((v)<<0) /* Bits per Frame */
432
433/* NT: These are here for completeness */
434#define D_NT_FBIT (1<<17) /* Frame Bit */
435#define D_NT_NBF (1<<16) /* Number of bad frames to loose framing */
436#define D_NT_IRM_IMM (1<<15) /* Interrupt Report & Mask: Immediate */
437#define D_NT_IRM_EN (1<<14) /* Interrupt Report & Mask: Enable */
Krzysztof Helt098ccbc2007-08-20 12:30:54 +0200438#define D_NT_ISNT (1<<13) /* Configure interface as NT */
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200439#define D_NT_FT (1<<12) /* Fixed Timing */
440#define D_NT_EZ (1<<11) /* Echo Channel is Zeros */
441#define D_NT_IFA (1<<10) /* Inhibit Final Activation */
442#define D_NT_ACT (1<<9) /* Activate Interface */
443#define D_NT_MFE (1<<8) /* Multiframe Enable */
444#define D_NT_RLB(v) ((v)<<5) /* Remote Loopback */
445#define D_NT_LLB(v) ((v)<<2) /* Local Loopback */
446#define D_NT_FACT (1<<1) /* Force Activation */
447#define D_NT_ABV (1<<0) /* Activate Bipolar Violation */
448
449/* Codec Setup */
450#define D_CDEC_CK(v) ((v)<<24) /* Clock Select */
451#define D_CDEC_FED(v) ((v)<<12) /* FSCOD Falling Edge Delay */
452#define D_CDEC_RED(v) ((v)<<0) /* FSCOD Rising Edge Delay */
453
454/* Test */
455#define D_TEST_RAM(v) ((v)<<16) /* RAM Pointer */
456#define D_TEST_SIZE(v) ((v)<<11) /* */
457#define D_TEST_ROMONOFF 0x5 /* Toggle ROM opcode monitor on/off */
Krzysztof Helt098ccbc2007-08-20 12:30:54 +0200458#define D_TEST_PROC 0x6 /* Microprocessor test */
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200459#define D_TEST_SER 0x7 /* Serial-Controller test */
460#define D_TEST_RAMREAD 0x8 /* Copy from Ram to system memory */
461#define D_TEST_RAMWRITE 0x9 /* Copy into Ram from system memory */
462#define D_TEST_RAMBIST 0xa /* RAM Built-In Self Test */
463#define D_TEST_MCBIST 0xb /* Microcontroller Built-In Self Test */
464#define D_TEST_DUMP 0xe /* ROM Dump */
465
466/* CHI Data Mode */
Krzysztof Helt098ccbc2007-08-20 12:30:54 +0200467#define D_CDM_THI (1 << 8) /* Transmit Data on CHIDR Pin */
468#define D_CDM_RHI (1 << 7) /* Receive Data on CHIDX Pin */
469#define D_CDM_RCE (1 << 6) /* Receive on Rising Edge of CHICK */
470#define D_CDM_XCE (1 << 2) /* Transmit Data on Rising Edge of CHICK */
471#define D_CDM_XEN (1 << 1) /* Transmit Highway Enable */
472#define D_CDM_REN (1 << 0) /* Receive Highway Enable */
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200473
474/* The Interrupts */
475#define D_INTR_BRDY 1 /* Buffer Ready for processing */
476#define D_INTR_MINT 2 /* Marked Interrupt in RD/TD */
477#define D_INTR_IBEG 3 /* Flag to idle transition detected (HDLC) */
478#define D_INTR_IEND 4 /* Idle to flag transition detected (HDLC) */
479#define D_INTR_EOL 5 /* End of List */
480#define D_INTR_CMDI 6 /* Command has bean read */
481#define D_INTR_XCMP 8 /* Transmission of frame complete */
482#define D_INTR_SBRI 9 /* BRI status change info */
483#define D_INTR_FXDT 10 /* Fixed data change */
484#define D_INTR_CHIL 11 /* CHI lost frame sync (channel 36 only) */
485#define D_INTR_COLL 11 /* Unrecoverable D-Channel collision */
486#define D_INTR_DBYT 12 /* Dropped by frame slip */
487#define D_INTR_RBYT 13 /* Repeated by frame slip */
488#define D_INTR_LINT 14 /* Lost Interrupt */
489#define D_INTR_UNDR 15 /* DMA underrun */
490
491#define D_INTR_TE 32
492#define D_INTR_NT 34
493#define D_INTR_CHI 36
494#define D_INTR_CMD 38
495
Krzysztof Helt098ccbc2007-08-20 12:30:54 +0200496#define D_INTR_GETCHAN(v) (((v) >> 24) & 0x3f)
497#define D_INTR_GETCODE(v) (((v) >> 20) & 0xf)
498#define D_INTR_GETCMD(v) (((v) >> 16) & 0xf)
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200499#define D_INTR_GETVAL(v) ((v) & 0xffff)
500#define D_INTR_GETRVAL(v) ((v) & 0xfffff)
501
502#define D_P_0 0 /* TE receive anchor */
503#define D_P_1 1 /* TE transmit anchor */
504#define D_P_2 2 /* NT transmit anchor */
505#define D_P_3 3 /* NT receive anchor */
506#define D_P_4 4 /* CHI send data */
507#define D_P_5 5 /* CHI receive data */
508#define D_P_6 6 /* */
509#define D_P_7 7 /* */
510#define D_P_8 8 /* */
511#define D_P_9 9 /* */
512#define D_P_10 10 /* */
513#define D_P_11 11 /* */
514#define D_P_12 12 /* */
515#define D_P_13 13 /* */
516#define D_P_14 14 /* */
517#define D_P_15 15 /* */
518#define D_P_16 16 /* CHI anchor pipe */
519#define D_P_17 17 /* CHI send */
520#define D_P_18 18 /* CHI receive */
521#define D_P_19 19 /* CHI receive */
522#define D_P_20 20 /* CHI receive */
523#define D_P_21 21 /* */
524#define D_P_22 22 /* */
525#define D_P_23 23 /* */
526#define D_P_24 24 /* */
527#define D_P_25 25 /* */
528#define D_P_26 26 /* */
529#define D_P_27 27 /* */
530#define D_P_28 28 /* */
531#define D_P_29 29 /* */
532#define D_P_30 30 /* */
533#define D_P_31 31 /* */
534
535/* Transmit descriptor defines */
Krzysztof Helt098ccbc2007-08-20 12:30:54 +0200536#define DBRI_TD_F (1 << 31) /* End of Frame */
537#define DBRI_TD_D (1 << 30) /* Do not append CRC */
538#define DBRI_TD_CNT(v) ((v) << 16) /* Number of valid bytes in the buffer */
539#define DBRI_TD_B (1 << 15) /* Final interrupt */
540#define DBRI_TD_M (1 << 14) /* Marker interrupt */
541#define DBRI_TD_I (1 << 13) /* Transmit Idle Characters */
542#define DBRI_TD_FCNT(v) (v) /* Flag Count */
543#define DBRI_TD_UNR (1 << 3) /* Underrun: transmitter is out of data */
544#define DBRI_TD_ABT (1 << 2) /* Abort: frame aborted */
545#define DBRI_TD_TBC (1 << 0) /* Transmit buffer Complete */
546#define DBRI_TD_STATUS(v) ((v) & 0xff) /* Transmit status */
547 /* Maximum buffer size per TD: almost 8KB */
Krzysztof Helt1be54c82006-08-21 19:30:57 +0200548#define DBRI_TD_MAXCNT ((1 << 13) - 4)
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200549
550/* Receive descriptor defines */
Krzysztof Helt098ccbc2007-08-20 12:30:54 +0200551#define DBRI_RD_F (1 << 31) /* End of Frame */
552#define DBRI_RD_C (1 << 30) /* Completed buffer */
553#define DBRI_RD_B (1 << 15) /* Final interrupt */
554#define DBRI_RD_M (1 << 14) /* Marker interrupt */
555#define DBRI_RD_BCNT(v) (v) /* Buffer size */
556#define DBRI_RD_CRC (1 << 7) /* 0: CRC is correct */
557#define DBRI_RD_BBC (1 << 6) /* 1: Bad Byte received */
558#define DBRI_RD_ABT (1 << 5) /* Abort: frame aborted */
559#define DBRI_RD_OVRN (1 << 3) /* Overrun: data lost */
560#define DBRI_RD_STATUS(v) ((v) & 0xff) /* Receive status */
561#define DBRI_RD_CNT(v) (((v) >> 16) & 0x1fff) /* Valid bytes in the buffer */
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200562
563/* stream_info[] access */
564/* Translate the ALSA direction into the array index */
565#define DBRI_STREAMNO(substream) \
Krzysztof Helt098ccbc2007-08-20 12:30:54 +0200566 (substream->stream == \
Krzysztof Heltcf68d212007-09-04 13:09:20 +0200567 SNDRV_PCM_STREAM_PLAYBACK ? DBRI_PLAY: DBRI_REC)
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200568
569/* Return a pointer to dbri_streaminfo */
Krzysztof Helt098ccbc2007-08-20 12:30:54 +0200570#define DBRI_STREAM(dbri, substream) \
571 &dbri->stream_info[DBRI_STREAMNO(substream)]
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200572
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200573/*
574 * Short data pipes transmit LSB first. The CS4215 receives MSB first. Grrr.
575 * So we have to reverse the bits. Note: not all bit lengths are supported
576 */
577static __u32 reverse_bytes(__u32 b, int len)
578{
579 switch (len) {
580 case 32:
581 b = ((b & 0xffff0000) >> 16) | ((b & 0x0000ffff) << 16);
582 case 16:
583 b = ((b & 0xff00ff00) >> 8) | ((b & 0x00ff00ff) << 8);
584 case 8:
585 b = ((b & 0xf0f0f0f0) >> 4) | ((b & 0x0f0f0f0f) << 4);
586 case 4:
587 b = ((b & 0xcccccccc) >> 2) | ((b & 0x33333333) << 2);
588 case 2:
589 b = ((b & 0xaaaaaaaa) >> 1) | ((b & 0x55555555) << 1);
590 case 1:
591 case 0:
592 break;
593 default:
594 printk(KERN_ERR "DBRI reverse_bytes: unsupported length\n");
Peter Senna Tschudin395d9dd2012-09-28 11:24:57 +0200595 }
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200596
597 return b;
598}
599
600/*
601****************************************************************************
602************** DBRI initialization and command synchronization *************
603****************************************************************************
604
605Commands are sent to the DBRI by building a list of them in memory,
606then writing the address of the first list item to DBRI register 8.
Martin Habets43388292005-09-10 15:39:00 +0200607The list is terminated with a WAIT command, which generates a
608CPU interrupt to signal completion.
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200609
610Since the DBRI can run in parallel with the CPU, several means of
Krzysztof Heltcf68d212007-09-04 13:09:20 +0200611synchronization present themselves. The method implemented here uses
612the dbri_cmdwait() to wait for execution of batch of sent commands.
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200613
Krzysztof Helt098ccbc2007-08-20 12:30:54 +0200614A circular command buffer is used here. A new command is being added
Krzysztof Heltaaad3652006-08-28 12:59:23 +0200615while another can be executed. The scheme works by adding two WAIT commands
Krzysztof Helt1be54c82006-08-21 19:30:57 +0200616after each sent batch of commands. When the next batch is prepared it is
617added after the WAIT commands then the WAITs are replaced with single JUMP
Krzysztof Helt098ccbc2007-08-20 12:30:54 +0200618command to the new batch. The the DBRI is forced to reread the last WAIT
619command (replaced by the JUMP by then). If the DBRI is still executing
Krzysztof Helt1be54c82006-08-21 19:30:57 +0200620previous commands the request to reread the WAIT command is ignored.
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200621
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200622Every time a routine wants to write commands to the DBRI, it must
Krzysztof Helt098ccbc2007-08-20 12:30:54 +0200623first call dbri_cmdlock() and get pointer to a free space in
624dbri->dma->cmd buffer. After this, the commands can be written to
625the buffer, and dbri_cmdsend() is called with the final pointer value
Krzysztof Helt1be54c82006-08-21 19:30:57 +0200626to send them to the DBRI.
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200627
628*/
629
Krzysztof Heltaaad3652006-08-28 12:59:23 +0200630#define MAXLOOPS 20
Krzysztof Helt1be54c82006-08-21 19:30:57 +0200631/*
632 * Wait for the current command string to execute
633 */
634static void dbri_cmdwait(struct snd_dbri *dbri)
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200635{
Martin Habets43388292005-09-10 15:39:00 +0200636 int maxloops = MAXLOOPS;
Krzysztof Heltea543f12006-09-05 20:25:05 +0200637 unsigned long flags;
Martin Habets43388292005-09-10 15:39:00 +0200638
Martin Habets43388292005-09-10 15:39:00 +0200639 /* Delay if previous commands are still being processed */
Krzysztof Heltea543f12006-09-05 20:25:05 +0200640 spin_lock_irqsave(&dbri->lock, flags);
641 while ((--maxloops) > 0 && (sbus_readl(dbri->regs + REG0) & D_P)) {
642 spin_unlock_irqrestore(&dbri->lock, flags);
Martin Habets43388292005-09-10 15:39:00 +0200643 msleep_interruptible(1);
Krzysztof Heltea543f12006-09-05 20:25:05 +0200644 spin_lock_irqsave(&dbri->lock, flags);
645 }
646 spin_unlock_irqrestore(&dbri->lock, flags);
Krzysztof Helt1be54c82006-08-21 19:30:57 +0200647
Krzysztof Heltcf68d212007-09-04 13:09:20 +0200648 if (maxloops == 0)
Krzysztof Helt1be54c82006-08-21 19:30:57 +0200649 printk(KERN_ERR "DBRI: Chip never completed command buffer\n");
Krzysztof Heltcf68d212007-09-04 13:09:20 +0200650 else
Martin Habets43388292005-09-10 15:39:00 +0200651 dprintk(D_CMD, "Chip completed command buffer (%d)\n",
652 MAXLOOPS - maxloops - 1);
Krzysztof Helt1be54c82006-08-21 19:30:57 +0200653}
654/*
Krzysztof Heltcf68d212007-09-04 13:09:20 +0200655 * Lock the command queue and return pointer to space for len cmd words
Krzysztof Helt1be54c82006-08-21 19:30:57 +0200656 * It locks the cmdlock spinlock.
657 */
Krzysztof Helt098ccbc2007-08-20 12:30:54 +0200658static s32 *dbri_cmdlock(struct snd_dbri *dbri, int len)
Krzysztof Helt1be54c82006-08-21 19:30:57 +0200659{
660 /* Space for 2 WAIT cmds (replaced later by 1 JUMP cmd) */
661 len += 2;
662 spin_lock(&dbri->cmdlock);
663 if (dbri->cmdptr - dbri->dma->cmd + len < DBRI_NO_CMDS - 2)
664 return dbri->cmdptr + 2;
665 else if (len < sbus_readl(dbri->regs + REG8) - dbri->dma_dvma)
666 return dbri->dma->cmd;
667 else
668 printk(KERN_ERR "DBRI: no space for commands.");
Martin Habets43388292005-09-10 15:39:00 +0200669
Al Viroae97dd92006-09-24 23:42:57 +0100670 return NULL;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200671}
672
Krzysztof Helt1be54c82006-08-21 19:30:57 +0200673/*
Robert P. J. Daybeb7dd82007-05-09 07:14:03 +0200674 * Send prepared cmd string. It works by writing a JUMP cmd into
Krzysztof Helt1be54c82006-08-21 19:30:57 +0200675 * the last WAIT cmd and force DBRI to reread the cmd.
Krzysztof Heltab93c7a2006-08-23 11:37:36 +0200676 * The JUMP cmd points to the new cmd string.
Krzysztof Helt1be54c82006-08-21 19:30:57 +0200677 * It also releases the cmdlock spinlock.
Krzysztof Heltea543f12006-09-05 20:25:05 +0200678 *
Krzysztof Heltca405872006-12-18 14:41:03 +0100679 * Lock must be held before calling this.
Krzysztof Helt1be54c82006-08-21 19:30:57 +0200680 */
Krzysztof Helt098ccbc2007-08-20 12:30:54 +0200681static void dbri_cmdsend(struct snd_dbri *dbri, s32 *cmd, int len)
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200682{
Krzysztof Helt1be54c82006-08-21 19:30:57 +0200683 s32 tmp, addr;
684 static int wait_id = 0;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200685
Krzysztof Helt1be54c82006-08-21 19:30:57 +0200686 wait_id++;
687 wait_id &= 0xffff; /* restrict it to a 16 bit counter. */
688 *(cmd) = DBRI_CMD(D_WAIT, 1, wait_id);
689 *(cmd+1) = DBRI_CMD(D_WAIT, 1, wait_id);
690
691 /* Replace the last command with JUMP */
692 addr = dbri->dma_dvma + (cmd - len - dbri->dma->cmd) * sizeof(s32);
693 *(dbri->cmdptr+1) = addr;
694 *(dbri->cmdptr) = DBRI_CMD(D_JUMP, 0, 0);
695
696#ifdef DBRI_DEBUG
Krzysztof Heltab93c7a2006-08-23 11:37:36 +0200697 if (cmd > dbri->cmdptr) {
698 s32 *ptr;
699
Krzysztof Heltaaad3652006-08-28 12:59:23 +0200700 for (ptr = dbri->cmdptr; ptr < cmd+2; ptr++)
Krzysztof Helt098ccbc2007-08-20 12:30:54 +0200701 dprintk(D_CMD, "cmd: %lx:%08x\n",
702 (unsigned long)ptr, *ptr);
Krzysztof Heltab93c7a2006-08-23 11:37:36 +0200703 } else {
704 s32 *ptr = dbri->cmdptr;
705
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200706 dprintk(D_CMD, "cmd: %lx:%08x\n", (unsigned long)ptr, *ptr);
Krzysztof Heltab93c7a2006-08-23 11:37:36 +0200707 ptr++;
Krzysztof Helt1be54c82006-08-21 19:30:57 +0200708 dprintk(D_CMD, "cmd: %lx:%08x\n", (unsigned long)ptr, *ptr);
Krzysztof Helt098ccbc2007-08-20 12:30:54 +0200709 for (ptr = dbri->dma->cmd; ptr < cmd+2; ptr++)
710 dprintk(D_CMD, "cmd: %lx:%08x\n",
711 (unsigned long)ptr, *ptr);
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200712 }
Krzysztof Helt1be54c82006-08-21 19:30:57 +0200713#endif
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200714
Krzysztof Helt1be54c82006-08-21 19:30:57 +0200715 /* Reread the last command */
716 tmp = sbus_readl(dbri->regs + REG0);
717 tmp |= D_P;
718 sbus_writel(tmp, dbri->regs + REG0);
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200719
Krzysztof Helt1be54c82006-08-21 19:30:57 +0200720 dbri->cmdptr = cmd;
721 spin_unlock(&dbri->cmdlock);
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200722}
723
724/* Lock must be held when calling this */
Krzysztof Helt098ccbc2007-08-20 12:30:54 +0200725static void dbri_reset(struct snd_dbri *dbri)
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200726{
727 int i;
Krzysztof Heltd1fdf072006-08-21 19:29:18 +0200728 u32 tmp;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200729
730 dprintk(D_GEN, "reset 0:%x 2:%x 8:%x 9:%x\n",
731 sbus_readl(dbri->regs + REG0),
732 sbus_readl(dbri->regs + REG2),
733 sbus_readl(dbri->regs + REG8), sbus_readl(dbri->regs + REG9));
734
735 sbus_writel(D_R, dbri->regs + REG0); /* Soft Reset */
736 for (i = 0; (sbus_readl(dbri->regs + REG0) & D_R) && i < 64; i++)
737 udelay(10);
Krzysztof Heltd1fdf072006-08-21 19:29:18 +0200738
739 /* A brute approach - DBRI falls back to working burst size by itself
740 * On SS20 D_S does not work, so do not try so high. */
741 tmp = sbus_readl(dbri->regs + REG0);
742 tmp |= D_G | D_E;
743 tmp &= ~D_S;
744 sbus_writel(tmp, dbri->regs + REG0);
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200745}
746
747/* Lock must not be held before calling this */
Bill Pemberton32e02a72012-12-06 12:35:25 -0500748static void dbri_initialize(struct snd_dbri *dbri)
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200749{
Krzysztof Helt1be54c82006-08-21 19:30:57 +0200750 s32 *cmd;
Krzysztof Heltd1fdf072006-08-21 19:29:18 +0200751 u32 dma_addr;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200752 unsigned long flags;
753 int n;
754
755 spin_lock_irqsave(&dbri->lock, flags);
756
757 dbri_reset(dbri);
758
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200759 /* Initialize pipes */
760 for (n = 0; n < DBRI_NO_PIPES; n++)
761 dbri->pipes[n].desc = dbri->pipes[n].first_desc = -1;
762
Krzysztof Helt1be54c82006-08-21 19:30:57 +0200763 spin_lock_init(&dbri->cmdlock);
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200764 /*
Krzysztof Helt098ccbc2007-08-20 12:30:54 +0200765 * Initialize the interrupt ring buffer.
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200766 */
767 dma_addr = dbri->dma_dvma + dbri_dma_off(intr, 0);
Krzysztof Helt6fb98282006-08-16 12:54:29 +0200768 dbri->dma->intr[0] = dma_addr;
769 dbri->dbri_irqp = 1;
770 /*
771 * Set up the interrupt queue
772 */
Krzysztof Helt1be54c82006-08-21 19:30:57 +0200773 spin_lock(&dbri->cmdlock);
774 cmd = dbri->cmdptr = dbri->dma->cmd;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200775 *(cmd++) = DBRI_CMD(D_IIQ, 0, 0);
776 *(cmd++) = dma_addr;
Krzysztof Helt1be54c82006-08-21 19:30:57 +0200777 *(cmd++) = DBRI_CMD(D_PAUSE, 0, 0);
778 dbri->cmdptr = cmd;
779 *(cmd++) = DBRI_CMD(D_WAIT, 1, 0);
780 *(cmd++) = DBRI_CMD(D_WAIT, 1, 0);
781 dma_addr = dbri->dma_dvma + dbri_dma_off(cmd, 0);
782 sbus_writel(dma_addr, dbri->regs + REG8);
783 spin_unlock(&dbri->cmdlock);
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200784
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200785 spin_unlock_irqrestore(&dbri->lock, flags);
Krzysztof Heltea543f12006-09-05 20:25:05 +0200786 dbri_cmdwait(dbri);
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200787}
788
789/*
790****************************************************************************
791************************** DBRI data pipe management ***********************
792****************************************************************************
793
794While DBRI control functions use the command and interrupt buffers, the
795main data path takes the form of data pipes, which can be short (command
796and interrupt driven), or long (attached to DMA buffers). These functions
797provide a rudimentary means of setting up and managing the DBRI's pipes,
798but the calling functions have to make sure they respect the pipes' linked
799list ordering, among other things. The transmit and receive functions
800here interface closely with the transmit and receive interrupt code.
801
802*/
Krzysztof Heltcf68d212007-09-04 13:09:20 +0200803static inline int pipe_active(struct snd_dbri *dbri, int pipe)
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200804{
805 return ((pipe >= 0) && (dbri->pipes[pipe].desc != -1));
806}
807
808/* reset_pipe(dbri, pipe)
809 *
810 * Called on an in-use pipe to clear anything being transmitted or received
811 * Lock must be held before calling this.
812 */
Krzysztof Helt098ccbc2007-08-20 12:30:54 +0200813static void reset_pipe(struct snd_dbri *dbri, int pipe)
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200814{
815 int sdp;
816 int desc;
Krzysztof Helt1be54c82006-08-21 19:30:57 +0200817 s32 *cmd;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200818
Krzysztof Helt470f1f1a2006-08-21 19:28:16 +0200819 if (pipe < 0 || pipe > DBRI_MAX_PIPE) {
Krzysztof Helt098ccbc2007-08-20 12:30:54 +0200820 printk(KERN_ERR "DBRI: reset_pipe called with "
821 "illegal pipe number\n");
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200822 return;
823 }
824
825 sdp = dbri->pipes[pipe].sdp;
826 if (sdp == 0) {
Krzysztof Helt098ccbc2007-08-20 12:30:54 +0200827 printk(KERN_ERR "DBRI: reset_pipe called "
828 "on uninitialized pipe\n");
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200829 return;
830 }
831
Krzysztof Helt1be54c82006-08-21 19:30:57 +0200832 cmd = dbri_cmdlock(dbri, 3);
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200833 *(cmd++) = DBRI_CMD(D_SDP, 0, sdp | D_SDP_C | D_SDP_P);
834 *(cmd++) = 0;
Krzysztof Helt1be54c82006-08-21 19:30:57 +0200835 *(cmd++) = DBRI_CMD(D_PAUSE, 0, 0);
836 dbri_cmdsend(dbri, cmd, 3);
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200837
838 desc = dbri->pipes[pipe].first_desc;
Krzysztof Helt098ccbc2007-08-20 12:30:54 +0200839 if (desc >= 0)
Krzysztof Helt1be54c82006-08-21 19:30:57 +0200840 do {
Krzysztof Helt098ccbc2007-08-20 12:30:54 +0200841 dbri->dma->desc[desc].ba = 0;
842 dbri->dma->desc[desc].nda = 0;
Krzysztof Helt1be54c82006-08-21 19:30:57 +0200843 desc = dbri->next_desc[desc];
844 } while (desc != -1 && desc != dbri->pipes[pipe].first_desc);
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200845
846 dbri->pipes[pipe].desc = -1;
847 dbri->pipes[pipe].first_desc = -1;
848}
849
Krzysztof Heltea543f12006-09-05 20:25:05 +0200850/*
851 * Lock must be held before calling this.
852 */
Krzysztof Helt098ccbc2007-08-20 12:30:54 +0200853static void setup_pipe(struct snd_dbri *dbri, int pipe, int sdp)
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200854{
Krzysztof Helt470f1f1a2006-08-21 19:28:16 +0200855 if (pipe < 0 || pipe > DBRI_MAX_PIPE) {
Krzysztof Helt098ccbc2007-08-20 12:30:54 +0200856 printk(KERN_ERR "DBRI: setup_pipe called "
857 "with illegal pipe number\n");
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200858 return;
859 }
860
861 if ((sdp & 0xf800) != sdp) {
Krzysztof Helt098ccbc2007-08-20 12:30:54 +0200862 printk(KERN_ERR "DBRI: setup_pipe called "
863 "with strange SDP value\n");
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200864 /* sdp &= 0xf800; */
865 }
866
867 /* If this is a fixed receive pipe, arrange for an interrupt
868 * every time its data changes
869 */
870 if (D_SDP_MODE(sdp) == D_SDP_FIXED && !(sdp & D_SDP_TO_SER))
871 sdp |= D_SDP_CHANGE;
872
873 sdp |= D_PIPE(pipe);
874 dbri->pipes[pipe].sdp = sdp;
875 dbri->pipes[pipe].desc = -1;
876 dbri->pipes[pipe].first_desc = -1;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200877
878 reset_pipe(dbri, pipe);
879}
880
Krzysztof Heltea543f12006-09-05 20:25:05 +0200881/*
882 * Lock must be held before calling this.
883 */
Krzysztof Helt098ccbc2007-08-20 12:30:54 +0200884static void link_time_slot(struct snd_dbri *dbri, int pipe,
Krzysztof Helt294a30d2006-08-21 19:29:59 +0200885 int prevpipe, int nextpipe,
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200886 int length, int cycle)
887{
Krzysztof Helt1be54c82006-08-21 19:30:57 +0200888 s32 *cmd;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200889 int val;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200890
Krzysztof Helt098ccbc2007-08-20 12:30:54 +0200891 if (pipe < 0 || pipe > DBRI_MAX_PIPE
Krzysztof Helt294a30d2006-08-21 19:29:59 +0200892 || prevpipe < 0 || prevpipe > DBRI_MAX_PIPE
893 || nextpipe < 0 || nextpipe > DBRI_MAX_PIPE) {
Krzysztof Helt098ccbc2007-08-20 12:30:54 +0200894 printk(KERN_ERR
Martin Habets43388292005-09-10 15:39:00 +0200895 "DBRI: link_time_slot called with illegal pipe number\n");
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200896 return;
897 }
898
Krzysztof Helt098ccbc2007-08-20 12:30:54 +0200899 if (dbri->pipes[pipe].sdp == 0
Krzysztof Helt294a30d2006-08-21 19:29:59 +0200900 || dbri->pipes[prevpipe].sdp == 0
901 || dbri->pipes[nextpipe].sdp == 0) {
Krzysztof Helt098ccbc2007-08-20 12:30:54 +0200902 printk(KERN_ERR "DBRI: link_time_slot called "
903 "on uninitialized pipe\n");
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200904 return;
905 }
906
Krzysztof Helt294a30d2006-08-21 19:29:59 +0200907 dbri->pipes[prevpipe].nextpipe = pipe;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200908 dbri->pipes[pipe].nextpipe = nextpipe;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200909 dbri->pipes[pipe].length = length;
910
Krzysztof Helt1be54c82006-08-21 19:30:57 +0200911 cmd = dbri_cmdlock(dbri, 4);
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200912
Krzysztof Helt294a30d2006-08-21 19:29:59 +0200913 if (dbri->pipes[pipe].sdp & D_SDP_TO_SER) {
914 /* Deal with CHI special case:
915 * "If transmission on edges 0 or 1 is desired, then cycle n
916 * (where n = # of bit times per frame...) must be used."
917 * - DBRI data sheet, page 11
918 */
919 if (prevpipe == 16 && cycle == 0)
920 cycle = dbri->chi_bpf;
921
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200922 val = D_DTS_VO | D_DTS_INS | D_DTS_PRVOUT(prevpipe) | pipe;
923 *(cmd++) = DBRI_CMD(D_DTS, 0, val);
924 *(cmd++) = 0;
925 *(cmd++) =
926 D_TS_LEN(length) | D_TS_CYCLE(cycle) | D_TS_NEXT(nextpipe);
Krzysztof Helt294a30d2006-08-21 19:29:59 +0200927 } else {
928 val = D_DTS_VI | D_DTS_INS | D_DTS_PRVIN(prevpipe) | pipe;
929 *(cmd++) = DBRI_CMD(D_DTS, 0, val);
930 *(cmd++) =
931 D_TS_LEN(length) | D_TS_CYCLE(cycle) | D_TS_NEXT(nextpipe);
932 *(cmd++) = 0;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200933 }
Krzysztof Helt1be54c82006-08-21 19:30:57 +0200934 *(cmd++) = DBRI_CMD(D_PAUSE, 0, 0);
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200935
Krzysztof Helt1be54c82006-08-21 19:30:57 +0200936 dbri_cmdsend(dbri, cmd, 4);
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200937}
938
Krzysztof Heltea543f12006-09-05 20:25:05 +0200939#if 0
940/*
941 * Lock must be held before calling this.
942 */
Krzysztof Helt098ccbc2007-08-20 12:30:54 +0200943static void unlink_time_slot(struct snd_dbri *dbri, int pipe,
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200944 enum in_or_out direction, int prevpipe,
945 int nextpipe)
946{
Krzysztof Helt1be54c82006-08-21 19:30:57 +0200947 s32 *cmd;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200948 int val;
949
Krzysztof Helt098ccbc2007-08-20 12:30:54 +0200950 if (pipe < 0 || pipe > DBRI_MAX_PIPE
Krzysztof Helt1be54c82006-08-21 19:30:57 +0200951 || prevpipe < 0 || prevpipe > DBRI_MAX_PIPE
952 || nextpipe < 0 || nextpipe > DBRI_MAX_PIPE) {
Krzysztof Helt098ccbc2007-08-20 12:30:54 +0200953 printk(KERN_ERR
Martin Habets43388292005-09-10 15:39:00 +0200954 "DBRI: unlink_time_slot called with illegal pipe number\n");
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200955 return;
956 }
957
Krzysztof Helt1be54c82006-08-21 19:30:57 +0200958 cmd = dbri_cmdlock(dbri, 4);
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200959
960 if (direction == PIPEinput) {
961 val = D_DTS_VI | D_DTS_DEL | D_DTS_PRVIN(prevpipe) | pipe;
962 *(cmd++) = DBRI_CMD(D_DTS, 0, val);
963 *(cmd++) = D_TS_NEXT(nextpipe);
964 *(cmd++) = 0;
965 } else {
966 val = D_DTS_VO | D_DTS_DEL | D_DTS_PRVOUT(prevpipe) | pipe;
967 *(cmd++) = DBRI_CMD(D_DTS, 0, val);
968 *(cmd++) = 0;
969 *(cmd++) = D_TS_NEXT(nextpipe);
970 }
Krzysztof Helt1be54c82006-08-21 19:30:57 +0200971 *(cmd++) = DBRI_CMD(D_PAUSE, 0, 0);
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200972
Krzysztof Helt1be54c82006-08-21 19:30:57 +0200973 dbri_cmdsend(dbri, cmd, 4);
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200974}
Krzysztof Heltea543f12006-09-05 20:25:05 +0200975#endif
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200976
977/* xmit_fixed() / recv_fixed()
978 *
979 * Transmit/receive data on a "fixed" pipe - i.e, one whose contents are not
980 * expected to change much, and which we don't need to buffer.
981 * The DBRI only interrupts us when the data changes (receive pipes),
982 * or only changes the data when this function is called (transmit pipes).
983 * Only short pipes (numbers 16-31) can be used in fixed data mode.
984 *
985 * These function operate on a 32-bit field, no matter how large
986 * the actual time slot is. The interrupt handler takes care of bit
987 * ordering and alignment. An 8-bit time slot will always end up
988 * in the low-order 8 bits, filled either MSB-first or LSB-first,
Krzysztof Heltea543f12006-09-05 20:25:05 +0200989 * depending on the settings passed to setup_pipe().
990 *
991 * Lock must not be held before calling it.
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200992 */
Krzysztof Helt098ccbc2007-08-20 12:30:54 +0200993static void xmit_fixed(struct snd_dbri *dbri, int pipe, unsigned int data)
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200994{
Krzysztof Helt1be54c82006-08-21 19:30:57 +0200995 s32 *cmd;
Krzysztof Heltea543f12006-09-05 20:25:05 +0200996 unsigned long flags;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +0200997
Krzysztof Helt470f1f1a2006-08-21 19:28:16 +0200998 if (pipe < 16 || pipe > DBRI_MAX_PIPE) {
Martin Habets43388292005-09-10 15:39:00 +0200999 printk(KERN_ERR "DBRI: xmit_fixed: Illegal pipe number\n");
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001000 return;
1001 }
1002
1003 if (D_SDP_MODE(dbri->pipes[pipe].sdp) == 0) {
Krzysztof Helt098ccbc2007-08-20 12:30:54 +02001004 printk(KERN_ERR "DBRI: xmit_fixed: "
1005 "Uninitialized pipe %d\n", pipe);
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001006 return;
1007 }
1008
1009 if (D_SDP_MODE(dbri->pipes[pipe].sdp) != D_SDP_FIXED) {
Martin Habets43388292005-09-10 15:39:00 +02001010 printk(KERN_ERR "DBRI: xmit_fixed: Non-fixed pipe %d\n", pipe);
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001011 return;
1012 }
1013
1014 if (!(dbri->pipes[pipe].sdp & D_SDP_TO_SER)) {
Krzysztof Helt098ccbc2007-08-20 12:30:54 +02001015 printk(KERN_ERR "DBRI: xmit_fixed: Called on receive pipe %d\n",
1016 pipe);
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001017 return;
1018 }
1019
1020 /* DBRI short pipes always transmit LSB first */
1021
1022 if (dbri->pipes[pipe].sdp & D_SDP_MSB)
1023 data = reverse_bytes(data, dbri->pipes[pipe].length);
1024
Krzysztof Helt1be54c82006-08-21 19:30:57 +02001025 cmd = dbri_cmdlock(dbri, 3);
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001026
1027 *(cmd++) = DBRI_CMD(D_SSP, 0, pipe);
1028 *(cmd++) = data;
Krzysztof Helt1be54c82006-08-21 19:30:57 +02001029 *(cmd++) = DBRI_CMD(D_PAUSE, 0, 0);
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001030
Krzysztof Heltea543f12006-09-05 20:25:05 +02001031 spin_lock_irqsave(&dbri->lock, flags);
Krzysztof Helt1be54c82006-08-21 19:30:57 +02001032 dbri_cmdsend(dbri, cmd, 3);
Krzysztof Heltea543f12006-09-05 20:25:05 +02001033 spin_unlock_irqrestore(&dbri->lock, flags);
Krzysztof Helt1be54c82006-08-21 19:30:57 +02001034 dbri_cmdwait(dbri);
Krzysztof Heltea543f12006-09-05 20:25:05 +02001035
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001036}
1037
Krzysztof Helt098ccbc2007-08-20 12:30:54 +02001038static void recv_fixed(struct snd_dbri *dbri, int pipe, volatile __u32 *ptr)
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001039{
Krzysztof Helt470f1f1a2006-08-21 19:28:16 +02001040 if (pipe < 16 || pipe > DBRI_MAX_PIPE) {
Krzysztof Helt098ccbc2007-08-20 12:30:54 +02001041 printk(KERN_ERR "DBRI: recv_fixed called with "
1042 "illegal pipe number\n");
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001043 return;
1044 }
1045
1046 if (D_SDP_MODE(dbri->pipes[pipe].sdp) != D_SDP_FIXED) {
Krzysztof Helt098ccbc2007-08-20 12:30:54 +02001047 printk(KERN_ERR "DBRI: recv_fixed called on "
1048 "non-fixed pipe %d\n", pipe);
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001049 return;
1050 }
1051
1052 if (dbri->pipes[pipe].sdp & D_SDP_TO_SER) {
Krzysztof Helt098ccbc2007-08-20 12:30:54 +02001053 printk(KERN_ERR "DBRI: recv_fixed called on "
1054 "transmit pipe %d\n", pipe);
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001055 return;
1056 }
1057
1058 dbri->pipes[pipe].recv_fixed_ptr = ptr;
1059}
1060
1061/* setup_descs()
1062 *
1063 * Setup transmit/receive data on a "long" pipe - i.e, one associated
1064 * with a DMA buffer.
1065 *
1066 * Only pipe numbers 0-15 can be used in this mode.
1067 *
1068 * This function takes a stream number pointing to a data buffer,
1069 * and work by building chains of descriptors which identify the
1070 * data buffers. Buffers too large for a single descriptor will
1071 * be spread across multiple descriptors.
Krzysztof Helt1be54c82006-08-21 19:30:57 +02001072 *
1073 * All descriptors create a ring buffer.
Krzysztof Heltea543f12006-09-05 20:25:05 +02001074 *
1075 * Lock must be held before calling this.
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001076 */
Krzysztof Helt098ccbc2007-08-20 12:30:54 +02001077static int setup_descs(struct snd_dbri *dbri, int streamno, unsigned int period)
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001078{
Takashi Iwai475675d2005-11-17 15:11:51 +01001079 struct dbri_streaminfo *info = &dbri->stream_info[streamno];
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001080 __u32 dvma_buffer;
Krzysztof Helt99dabfe2006-08-28 13:00:45 +02001081 int desc;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001082 int len;
1083 int first_desc = -1;
1084 int last_desc = -1;
1085
1086 if (info->pipe < 0 || info->pipe > 15) {
Martin Habets43388292005-09-10 15:39:00 +02001087 printk(KERN_ERR "DBRI: setup_descs: Illegal pipe number\n");
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001088 return -2;
1089 }
1090
1091 if (dbri->pipes[info->pipe].sdp == 0) {
Martin Habets43388292005-09-10 15:39:00 +02001092 printk(KERN_ERR "DBRI: setup_descs: Uninitialized pipe %d\n",
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001093 info->pipe);
1094 return -2;
1095 }
1096
1097 dvma_buffer = info->dvma_buffer;
1098 len = info->size;
1099
1100 if (streamno == DBRI_PLAY) {
1101 if (!(dbri->pipes[info->pipe].sdp & D_SDP_TO_SER)) {
Krzysztof Helt098ccbc2007-08-20 12:30:54 +02001102 printk(KERN_ERR "DBRI: setup_descs: "
1103 "Called on receive pipe %d\n", info->pipe);
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001104 return -2;
1105 }
1106 } else {
1107 if (dbri->pipes[info->pipe].sdp & D_SDP_TO_SER) {
Krzysztof Helt098ccbc2007-08-20 12:30:54 +02001108 printk(KERN_ERR
Martin Habets43388292005-09-10 15:39:00 +02001109 "DBRI: setup_descs: Called on transmit pipe %d\n",
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001110 info->pipe);
1111 return -2;
1112 }
Krzysztof Helt098ccbc2007-08-20 12:30:54 +02001113 /* Should be able to queue multiple buffers
1114 * to receive on a pipe
1115 */
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001116 if (pipe_active(dbri, info->pipe)) {
Krzysztof Helt098ccbc2007-08-20 12:30:54 +02001117 printk(KERN_ERR "DBRI: recv_on_pipe: "
1118 "Called on active pipe %d\n", info->pipe);
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001119 return -2;
1120 }
1121
1122 /* Make sure buffer size is multiple of four */
1123 len &= ~3;
1124 }
1125
Krzysztof Helt99dabfe2006-08-28 13:00:45 +02001126 /* Free descriptors if pipe has any */
1127 desc = dbri->pipes[info->pipe].first_desc;
Krzysztof Helt098ccbc2007-08-20 12:30:54 +02001128 if (desc >= 0)
Krzysztof Helt99dabfe2006-08-28 13:00:45 +02001129 do {
Krzysztof Helt098ccbc2007-08-20 12:30:54 +02001130 dbri->dma->desc[desc].ba = 0;
1131 dbri->dma->desc[desc].nda = 0;
Krzysztof Helt99dabfe2006-08-28 13:00:45 +02001132 desc = dbri->next_desc[desc];
Krzysztof Helt098ccbc2007-08-20 12:30:54 +02001133 } while (desc != -1 &&
1134 desc != dbri->pipes[info->pipe].first_desc);
Krzysztof Helt99dabfe2006-08-28 13:00:45 +02001135
1136 dbri->pipes[info->pipe].desc = -1;
1137 dbri->pipes[info->pipe].first_desc = -1;
1138
1139 desc = 0;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001140 while (len > 0) {
1141 int mylen;
1142
1143 for (; desc < DBRI_NO_DESCS; desc++) {
Krzysztof Heltc2735442006-08-21 19:27:35 +02001144 if (!dbri->dma->desc[desc].ba)
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001145 break;
1146 }
Krzysztof Heltcf68d212007-09-04 13:09:20 +02001147
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001148 if (desc == DBRI_NO_DESCS) {
Martin Habets43388292005-09-10 15:39:00 +02001149 printk(KERN_ERR "DBRI: setup_descs: No descriptors\n");
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001150 return -1;
1151 }
1152
Krzysztof Helt1be54c82006-08-21 19:30:57 +02001153 if (len > DBRI_TD_MAXCNT)
1154 mylen = DBRI_TD_MAXCNT; /* 8KB - 4 */
1155 else
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001156 mylen = len;
Krzysztof Helt1be54c82006-08-21 19:30:57 +02001157
1158 if (mylen > period)
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001159 mylen = period;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001160
Krzysztof Heltc2735442006-08-21 19:27:35 +02001161 dbri->next_desc[desc] = -1;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001162 dbri->dma->desc[desc].ba = dvma_buffer;
1163 dbri->dma->desc[desc].nda = 0;
1164
1165 if (streamno == DBRI_PLAY) {
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001166 dbri->dma->desc[desc].word1 = DBRI_TD_CNT(mylen);
1167 dbri->dma->desc[desc].word4 = 0;
Krzysztof Helt098ccbc2007-08-20 12:30:54 +02001168 dbri->dma->desc[desc].word1 |= DBRI_TD_F | DBRI_TD_B;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001169 } else {
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001170 dbri->dma->desc[desc].word1 = 0;
1171 dbri->dma->desc[desc].word4 =
1172 DBRI_RD_B | DBRI_RD_BCNT(mylen);
1173 }
1174
Krzysztof Helt1be54c82006-08-21 19:30:57 +02001175 if (first_desc == -1)
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001176 first_desc = desc;
Krzysztof Helt1be54c82006-08-21 19:30:57 +02001177 else {
Krzysztof Heltc2735442006-08-21 19:27:35 +02001178 dbri->next_desc[last_desc] = desc;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001179 dbri->dma->desc[last_desc].nda =
1180 dbri->dma_dvma + dbri_dma_off(desc, desc);
1181 }
1182
1183 last_desc = desc;
1184 dvma_buffer += mylen;
1185 len -= mylen;
1186 }
1187
1188 if (first_desc == -1 || last_desc == -1) {
Krzysztof Helt098ccbc2007-08-20 12:30:54 +02001189 printk(KERN_ERR "DBRI: setup_descs: "
1190 " Not enough descriptors available\n");
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001191 return -1;
1192 }
1193
Krzysztof Heltaaad3652006-08-28 12:59:23 +02001194 dbri->dma->desc[last_desc].nda =
1195 dbri->dma_dvma + dbri_dma_off(desc, first_desc);
1196 dbri->next_desc[last_desc] = first_desc;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001197 dbri->pipes[info->pipe].first_desc = first_desc;
1198 dbri->pipes[info->pipe].desc = first_desc;
1199
Krzysztof Helt1be54c82006-08-21 19:30:57 +02001200#ifdef DBRI_DEBUG
Krzysztof Helt098ccbc2007-08-20 12:30:54 +02001201 for (desc = first_desc; desc != -1;) {
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001202 dprintk(D_DESC, "DESC %d: %08x %08x %08x %08x\n",
1203 desc,
1204 dbri->dma->desc[desc].word1,
1205 dbri->dma->desc[desc].ba,
1206 dbri->dma->desc[desc].nda, dbri->dma->desc[desc].word4);
Krzysztof Helt1be54c82006-08-21 19:30:57 +02001207 desc = dbri->next_desc[desc];
Krzysztof Helt098ccbc2007-08-20 12:30:54 +02001208 if (desc == first_desc)
Krzysztof Helt1be54c82006-08-21 19:30:57 +02001209 break;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001210 }
Krzysztof Helt1be54c82006-08-21 19:30:57 +02001211#endif
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001212 return 0;
1213}
1214
1215/*
1216****************************************************************************
1217************************** DBRI - CHI interface ****************************
1218****************************************************************************
1219
1220The CHI is a four-wire (clock, frame sync, data in, data out) time-division
1221multiplexed serial interface which the DBRI can operate in either master
1222(give clock/frame sync) or slave (take clock/frame sync) mode.
1223
1224*/
1225
1226enum master_or_slave { CHImaster, CHIslave };
1227
Krzysztof Heltea543f12006-09-05 20:25:05 +02001228/*
1229 * Lock must not be held before calling it.
1230 */
Krzysztof Helt098ccbc2007-08-20 12:30:54 +02001231static void reset_chi(struct snd_dbri *dbri,
1232 enum master_or_slave master_or_slave,
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001233 int bits_per_frame)
1234{
Krzysztof Helt1be54c82006-08-21 19:30:57 +02001235 s32 *cmd;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001236 int val;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001237
Krzysztof Helt1be54c82006-08-21 19:30:57 +02001238 /* Set CHI Anchor: Pipe 16 */
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001239
Krzysztof Helt1be54c82006-08-21 19:30:57 +02001240 cmd = dbri_cmdlock(dbri, 4);
Krzysztof Helt098ccbc2007-08-20 12:30:54 +02001241 val = D_DTS_VO | D_DTS_VI | D_DTS_INS
Krzysztof Helt1be54c82006-08-21 19:30:57 +02001242 | D_DTS_PRVIN(16) | D_PIPE(16) | D_DTS_PRVOUT(16);
1243 *(cmd++) = DBRI_CMD(D_DTS, 0, val);
1244 *(cmd++) = D_TS_ANCHOR | D_TS_NEXT(16);
1245 *(cmd++) = D_TS_ANCHOR | D_TS_NEXT(16);
1246 *(cmd++) = DBRI_CMD(D_PAUSE, 0, 0);
1247 dbri_cmdsend(dbri, cmd, 4);
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001248
Krzysztof Helt1be54c82006-08-21 19:30:57 +02001249 dbri->pipes[16].sdp = 1;
1250 dbri->pipes[16].nextpipe = 16;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001251
Krzysztof Helt1be54c82006-08-21 19:30:57 +02001252 cmd = dbri_cmdlock(dbri, 4);
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001253
1254 if (master_or_slave == CHIslave) {
1255 /* Setup DBRI for CHI Slave - receive clock, frame sync (FS)
1256 *
1257 * CHICM = 0 (slave mode, 8 kHz frame rate)
1258 * IR = give immediate CHI status interrupt
1259 * EN = give CHI status interrupt upon change
1260 */
1261 *(cmd++) = DBRI_CMD(D_CHI, 0, D_CHI_CHICM(0));
1262 } else {
1263 /* Setup DBRI for CHI Master - generate clock, FS
1264 *
Krzysztof Helt098ccbc2007-08-20 12:30:54 +02001265 * BPF = bits per 8 kHz frame
1266 * 12.288 MHz / CHICM_divisor = clock rate
1267 * FD = 1 - drive CHIFS on rising edge of CHICK
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001268 */
1269 int clockrate = bits_per_frame * 8;
1270 int divisor = 12288 / clockrate;
1271
1272 if (divisor > 255 || divisor * clockrate != 12288)
Krzysztof Helt098ccbc2007-08-20 12:30:54 +02001273 printk(KERN_ERR "DBRI: illegal bits_per_frame "
1274 "in setup_chi\n");
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001275
1276 *(cmd++) = DBRI_CMD(D_CHI, 0, D_CHI_CHICM(divisor) | D_CHI_FD
1277 | D_CHI_BPF(bits_per_frame));
1278 }
1279
1280 dbri->chi_bpf = bits_per_frame;
1281
1282 /* CHI Data Mode
1283 *
1284 * RCE = 0 - receive on falling edge of CHICK
1285 * XCE = 1 - transmit on rising edge of CHICK
1286 * XEN = 1 - enable transmitter
1287 * REN = 1 - enable receiver
1288 */
1289
1290 *(cmd++) = DBRI_CMD(D_PAUSE, 0, 0);
1291 *(cmd++) = DBRI_CMD(D_CDM, 0, D_CDM_XCE | D_CDM_XEN | D_CDM_REN);
Krzysztof Helt1be54c82006-08-21 19:30:57 +02001292 *(cmd++) = DBRI_CMD(D_PAUSE, 0, 0);
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001293
Krzysztof Helt1be54c82006-08-21 19:30:57 +02001294 dbri_cmdsend(dbri, cmd, 4);
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001295}
1296
1297/*
1298****************************************************************************
1299*********************** CS4215 audio codec management **********************
1300****************************************************************************
1301
1302In the standard SPARC audio configuration, the CS4215 codec is attached
1303to the DBRI via the CHI interface and few of the DBRI's PIO pins.
1304
Krzysztof Heltea543f12006-09-05 20:25:05 +02001305 * Lock must not be held before calling it.
1306
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001307*/
Bill Pemberton32e02a72012-12-06 12:35:25 -05001308static void cs4215_setup_pipes(struct snd_dbri *dbri)
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001309{
Krzysztof Heltea543f12006-09-05 20:25:05 +02001310 unsigned long flags;
1311
1312 spin_lock_irqsave(&dbri->lock, flags);
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001313 /*
1314 * Data mode:
1315 * Pipe 4: Send timeslots 1-4 (audio data)
1316 * Pipe 20: Send timeslots 5-8 (part of ctrl data)
1317 * Pipe 6: Receive timeslots 1-4 (audio data)
1318 * Pipe 21: Receive timeslots 6-7. We can only receive 20 bits via
1319 * interrupt, and the rest of the data (slot 5 and 8) is
1320 * not relevant for us (only for doublechecking).
1321 *
1322 * Control mode:
Krzysztof Helt098ccbc2007-08-20 12:30:54 +02001323 * Pipe 17: Send timeslots 1-4 (slots 5-8 are read only)
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001324 * Pipe 18: Receive timeslot 1 (clb).
Krzysztof Helt098ccbc2007-08-20 12:30:54 +02001325 * Pipe 19: Receive timeslot 7 (version).
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001326 */
1327
1328 setup_pipe(dbri, 4, D_SDP_MEM | D_SDP_TO_SER | D_SDP_MSB);
1329 setup_pipe(dbri, 20, D_SDP_FIXED | D_SDP_TO_SER | D_SDP_MSB);
1330 setup_pipe(dbri, 6, D_SDP_MEM | D_SDP_FROM_SER | D_SDP_MSB);
1331 setup_pipe(dbri, 21, D_SDP_FIXED | D_SDP_FROM_SER | D_SDP_MSB);
1332
1333 setup_pipe(dbri, 17, D_SDP_FIXED | D_SDP_TO_SER | D_SDP_MSB);
1334 setup_pipe(dbri, 18, D_SDP_FIXED | D_SDP_FROM_SER | D_SDP_MSB);
1335 setup_pipe(dbri, 19, D_SDP_FIXED | D_SDP_FROM_SER | D_SDP_MSB);
Krzysztof Heltea543f12006-09-05 20:25:05 +02001336 spin_unlock_irqrestore(&dbri->lock, flags);
Krzysztof Helt1be54c82006-08-21 19:30:57 +02001337
1338 dbri_cmdwait(dbri);
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001339}
1340
Bill Pemberton32e02a72012-12-06 12:35:25 -05001341static int cs4215_init_data(struct cs4215 *mm)
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001342{
1343 /*
1344 * No action, memory resetting only.
1345 *
1346 * Data Time Slot 5-8
1347 * Speaker,Line and Headphone enable. Gain set to the half.
1348 * Input is mike.
1349 */
1350 mm->data[0] = CS4215_LO(0x20) | CS4215_HE | CS4215_LE;
1351 mm->data[1] = CS4215_RO(0x20) | CS4215_SE;
1352 mm->data[2] = CS4215_LG(0x8) | CS4215_IS | CS4215_PIO0 | CS4215_PIO1;
1353 mm->data[3] = CS4215_RG(0x8) | CS4215_MA(0xf);
1354
1355 /*
1356 * Control Time Slot 1-4
1357 * 0: Default I/O voltage scale
1358 * 1: 8 bit ulaw, 8kHz, mono, high pass filter disabled
1359 * 2: Serial enable, CHI master, 128 bits per frame, clock 1
1360 * 3: Tests disabled
1361 */
1362 mm->ctrl[0] = CS4215_RSRVD_1 | CS4215_MLB;
1363 mm->ctrl[1] = CS4215_DFR_ULAW | CS4215_FREQ[0].csval;
1364 mm->ctrl[2] = CS4215_XCLK | CS4215_BSEL_128 | CS4215_FREQ[0].xtal;
1365 mm->ctrl[3] = 0;
1366
1367 mm->status = 0;
1368 mm->version = 0xff;
1369 mm->precision = 8; /* For ULAW */
Krzysztof Helt1be54c82006-08-21 19:30:57 +02001370 mm->channels = 1;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001371
1372 return 0;
1373}
1374
Krzysztof Helt098ccbc2007-08-20 12:30:54 +02001375static void cs4215_setdata(struct snd_dbri *dbri, int muted)
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001376{
1377 if (muted) {
1378 dbri->mm.data[0] |= 63;
1379 dbri->mm.data[1] |= 63;
1380 dbri->mm.data[2] &= ~15;
1381 dbri->mm.data[3] &= ~15;
1382 } else {
1383 /* Start by setting the playback attenuation. */
Takashi Iwai475675d2005-11-17 15:11:51 +01001384 struct dbri_streaminfo *info = &dbri->stream_info[DBRI_PLAY];
Krzysztof Helt470f1f1a2006-08-21 19:28:16 +02001385 int left_gain = info->left_gain & 0x3f;
1386 int right_gain = info->right_gain & 0x3f;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001387
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001388 dbri->mm.data[0] &= ~0x3f; /* Reset the volume bits */
1389 dbri->mm.data[1] &= ~0x3f;
1390 dbri->mm.data[0] |= (DBRI_MAX_VOLUME - left_gain);
1391 dbri->mm.data[1] |= (DBRI_MAX_VOLUME - right_gain);
1392
1393 /* Now set the recording gain. */
1394 info = &dbri->stream_info[DBRI_REC];
Krzysztof Helt470f1f1a2006-08-21 19:28:16 +02001395 left_gain = info->left_gain & 0xf;
1396 right_gain = info->right_gain & 0xf;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001397 dbri->mm.data[2] |= CS4215_LG(left_gain);
1398 dbri->mm.data[3] |= CS4215_RG(right_gain);
1399 }
1400
1401 xmit_fixed(dbri, 20, *(int *)dbri->mm.data);
1402}
1403
1404/*
1405 * Set the CS4215 to data mode.
1406 */
Krzysztof Helt098ccbc2007-08-20 12:30:54 +02001407static void cs4215_open(struct snd_dbri *dbri)
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001408{
1409 int data_width;
1410 u32 tmp;
Krzysztof Heltea543f12006-09-05 20:25:05 +02001411 unsigned long flags;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001412
1413 dprintk(D_MM, "cs4215_open: %d channels, %d bits\n",
1414 dbri->mm.channels, dbri->mm.precision);
1415
1416 /* Temporarily mute outputs, and wait 1/8000 sec (125 us)
1417 * to make sure this takes. This avoids clicking noises.
1418 */
1419
1420 cs4215_setdata(dbri, 1);
1421 udelay(125);
1422
1423 /*
1424 * Data mode:
1425 * Pipe 4: Send timeslots 1-4 (audio data)
1426 * Pipe 20: Send timeslots 5-8 (part of ctrl data)
1427 * Pipe 6: Receive timeslots 1-4 (audio data)
1428 * Pipe 21: Receive timeslots 6-7. We can only receive 20 bits via
1429 * interrupt, and the rest of the data (slot 5 and 8) is
1430 * not relevant for us (only for doublechecking).
1431 *
1432 * Just like in control mode, the time slots are all offset by eight
1433 * bits. The CS4215, it seems, observes TSIN (the delayed signal)
1434 * even if it's the CHI master. Don't ask me...
1435 */
Krzysztof Heltea543f12006-09-05 20:25:05 +02001436 spin_lock_irqsave(&dbri->lock, flags);
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001437 tmp = sbus_readl(dbri->regs + REG0);
1438 tmp &= ~(D_C); /* Disable CHI */
1439 sbus_writel(tmp, dbri->regs + REG0);
1440
1441 /* Switch CS4215 to data mode - set PIO3 to 1 */
1442 sbus_writel(D_ENPIO | D_PIO1 | D_PIO3 |
1443 (dbri->mm.onboard ? D_PIO0 : D_PIO2), dbri->regs + REG2);
1444
1445 reset_chi(dbri, CHIslave, 128);
1446
1447 /* Note: this next doesn't work for 8-bit stereo, because the two
1448 * channels would be on timeslots 1 and 3, with 2 and 4 idle.
1449 * (See CS4215 datasheet Fig 15)
1450 *
1451 * DBRI non-contiguous mode would be required to make this work.
1452 */
1453 data_width = dbri->mm.channels * dbri->mm.precision;
1454
Krzysztof Helt294a30d2006-08-21 19:29:59 +02001455 link_time_slot(dbri, 4, 16, 16, data_width, dbri->mm.offset);
1456 link_time_slot(dbri, 20, 4, 16, 32, dbri->mm.offset + 32);
1457 link_time_slot(dbri, 6, 16, 16, data_width, dbri->mm.offset);
1458 link_time_slot(dbri, 21, 6, 16, 16, dbri->mm.offset + 40);
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001459
1460 /* FIXME: enable CHI after _setdata? */
1461 tmp = sbus_readl(dbri->regs + REG0);
1462 tmp |= D_C; /* Enable CHI */
1463 sbus_writel(tmp, dbri->regs + REG0);
Krzysztof Heltea543f12006-09-05 20:25:05 +02001464 spin_unlock_irqrestore(&dbri->lock, flags);
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001465
1466 cs4215_setdata(dbri, 0);
1467}
1468
1469/*
1470 * Send the control information (i.e. audio format)
1471 */
Krzysztof Helt098ccbc2007-08-20 12:30:54 +02001472static int cs4215_setctrl(struct snd_dbri *dbri)
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001473{
1474 int i, val;
1475 u32 tmp;
Krzysztof Heltea543f12006-09-05 20:25:05 +02001476 unsigned long flags;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001477
1478 /* FIXME - let the CPU do something useful during these delays */
1479
1480 /* Temporarily mute outputs, and wait 1/8000 sec (125 us)
1481 * to make sure this takes. This avoids clicking noises.
1482 */
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001483 cs4215_setdata(dbri, 1);
1484 udelay(125);
1485
1486 /*
1487 * Enable Control mode: Set DBRI's PIO3 (4215's D/~C) to 0, then wait
1488 * 12 cycles <= 12/(5512.5*64) sec = 34.01 usec
1489 */
1490 val = D_ENPIO | D_PIO1 | (dbri->mm.onboard ? D_PIO0 : D_PIO2);
1491 sbus_writel(val, dbri->regs + REG2);
1492 dprintk(D_MM, "cs4215_setctrl: reg2=0x%x\n", val);
1493 udelay(34);
1494
1495 /* In Control mode, the CS4215 is a slave device, so the DBRI must
1496 * operate as CHI master, supplying clocking and frame synchronization.
1497 *
1498 * In Data mode, however, the CS4215 must be CHI master to insure
1499 * that its data stream is synchronous with its codec.
1500 *
1501 * The upshot of all this? We start by putting the DBRI into master
1502 * mode, program the CS4215 in Control mode, then switch the CS4215
1503 * into Data mode and put the DBRI into slave mode. Various timing
1504 * requirements must be observed along the way.
1505 *
1506 * Oh, and one more thing, on a SPARCStation 20 (and maybe
1507 * others?), the addressing of the CS4215's time slots is
1508 * offset by eight bits, so we add eight to all the "cycle"
1509 * values in the Define Time Slot (DTS) commands. This is
1510 * done in hardware by a TI 248 that delays the DBRI->4215
1511 * frame sync signal by eight clock cycles. Anybody know why?
1512 */
Krzysztof Heltea543f12006-09-05 20:25:05 +02001513 spin_lock_irqsave(&dbri->lock, flags);
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001514 tmp = sbus_readl(dbri->regs + REG0);
1515 tmp &= ~D_C; /* Disable CHI */
1516 sbus_writel(tmp, dbri->regs + REG0);
1517
1518 reset_chi(dbri, CHImaster, 128);
1519
1520 /*
1521 * Control mode:
Krzysztof Helt098ccbc2007-08-20 12:30:54 +02001522 * Pipe 17: Send timeslots 1-4 (slots 5-8 are read only)
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001523 * Pipe 18: Receive timeslot 1 (clb).
Krzysztof Helt098ccbc2007-08-20 12:30:54 +02001524 * Pipe 19: Receive timeslot 7 (version).
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001525 */
1526
Krzysztof Helt294a30d2006-08-21 19:29:59 +02001527 link_time_slot(dbri, 17, 16, 16, 32, dbri->mm.offset);
1528 link_time_slot(dbri, 18, 16, 16, 8, dbri->mm.offset);
1529 link_time_slot(dbri, 19, 18, 16, 8, dbri->mm.offset + 48);
Krzysztof Heltea543f12006-09-05 20:25:05 +02001530 spin_unlock_irqrestore(&dbri->lock, flags);
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001531
1532 /* Wait for the chip to echo back CLB (Control Latch Bit) as zero */
1533 dbri->mm.ctrl[0] &= ~CS4215_CLB;
1534 xmit_fixed(dbri, 17, *(int *)dbri->mm.ctrl);
1535
Krzysztof Heltea543f12006-09-05 20:25:05 +02001536 spin_lock_irqsave(&dbri->lock, flags);
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001537 tmp = sbus_readl(dbri->regs + REG0);
1538 tmp |= D_C; /* Enable CHI */
1539 sbus_writel(tmp, dbri->regs + REG0);
Krzysztof Heltea543f12006-09-05 20:25:05 +02001540 spin_unlock_irqrestore(&dbri->lock, flags);
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001541
Krzysztof Helt098ccbc2007-08-20 12:30:54 +02001542 for (i = 10; ((dbri->mm.status & 0xe4) != 0x20); --i)
Martin Habets43388292005-09-10 15:39:00 +02001543 msleep_interruptible(1);
Krzysztof Helt098ccbc2007-08-20 12:30:54 +02001544
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001545 if (i == 0) {
1546 dprintk(D_MM, "CS4215 didn't respond to CLB (0x%02x)\n",
1547 dbri->mm.status);
1548 return -1;
1549 }
1550
1551 /* Disable changes to our copy of the version number, as we are about
1552 * to leave control mode.
1553 */
1554 recv_fixed(dbri, 19, NULL);
1555
1556 /* Terminate CS4215 control mode - data sheet says
1557 * "Set CLB=1 and send two more frames of valid control info"
1558 */
1559 dbri->mm.ctrl[0] |= CS4215_CLB;
1560 xmit_fixed(dbri, 17, *(int *)dbri->mm.ctrl);
1561
1562 /* Two frames of control info @ 8kHz frame rate = 250 us delay */
1563 udelay(250);
1564
1565 cs4215_setdata(dbri, 0);
1566
1567 return 0;
1568}
1569
1570/*
1571 * Setup the codec with the sampling rate, audio format and number of
1572 * channels.
1573 * As part of the process we resend the settings for the data
1574 * timeslots as well.
1575 */
Krzysztof Helt098ccbc2007-08-20 12:30:54 +02001576static int cs4215_prepare(struct snd_dbri *dbri, unsigned int rate,
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001577 snd_pcm_format_t format, unsigned int channels)
1578{
1579 int freq_idx;
1580 int ret = 0;
1581
1582 /* Lookup index for this rate */
1583 for (freq_idx = 0; CS4215_FREQ[freq_idx].freq != 0; freq_idx++) {
1584 if (CS4215_FREQ[freq_idx].freq == rate)
1585 break;
1586 }
1587 if (CS4215_FREQ[freq_idx].freq != rate) {
1588 printk(KERN_WARNING "DBRI: Unsupported rate %d Hz\n", rate);
1589 return -1;
1590 }
1591
1592 switch (format) {
1593 case SNDRV_PCM_FORMAT_MU_LAW:
1594 dbri->mm.ctrl[1] = CS4215_DFR_ULAW;
1595 dbri->mm.precision = 8;
1596 break;
1597 case SNDRV_PCM_FORMAT_A_LAW:
1598 dbri->mm.ctrl[1] = CS4215_DFR_ALAW;
1599 dbri->mm.precision = 8;
1600 break;
1601 case SNDRV_PCM_FORMAT_U8:
1602 dbri->mm.ctrl[1] = CS4215_DFR_LINEAR8;
1603 dbri->mm.precision = 8;
1604 break;
1605 case SNDRV_PCM_FORMAT_S16_BE:
1606 dbri->mm.ctrl[1] = CS4215_DFR_LINEAR16;
1607 dbri->mm.precision = 16;
1608 break;
1609 default:
1610 printk(KERN_WARNING "DBRI: Unsupported format %d\n", format);
1611 return -1;
1612 }
1613
1614 /* Add rate parameters */
1615 dbri->mm.ctrl[1] |= CS4215_FREQ[freq_idx].csval;
1616 dbri->mm.ctrl[2] = CS4215_XCLK |
1617 CS4215_BSEL_128 | CS4215_FREQ[freq_idx].xtal;
1618
1619 dbri->mm.channels = channels;
Krzysztof Heltab93c7a2006-08-23 11:37:36 +02001620 if (channels == 2)
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001621 dbri->mm.ctrl[1] |= CS4215_DFR_STEREO;
1622
1623 ret = cs4215_setctrl(dbri);
1624 if (ret == 0)
1625 cs4215_open(dbri); /* set codec to data mode */
1626
1627 return ret;
1628}
1629
1630/*
1631 *
1632 */
Bill Pemberton32e02a72012-12-06 12:35:25 -05001633static int cs4215_init(struct snd_dbri *dbri)
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001634{
1635 u32 reg2 = sbus_readl(dbri->regs + REG2);
1636 dprintk(D_MM, "cs4215_init: reg2=0x%x\n", reg2);
1637
1638 /* Look for the cs4215 chips */
1639 if (reg2 & D_PIO2) {
1640 dprintk(D_MM, "Onboard CS4215 detected\n");
1641 dbri->mm.onboard = 1;
1642 }
1643 if (reg2 & D_PIO0) {
1644 dprintk(D_MM, "Speakerbox detected\n");
1645 dbri->mm.onboard = 0;
1646
1647 if (reg2 & D_PIO2) {
1648 printk(KERN_INFO "DBRI: Using speakerbox / "
1649 "ignoring onboard mmcodec.\n");
1650 sbus_writel(D_ENPIO2, dbri->regs + REG2);
1651 }
1652 }
1653
1654 if (!(reg2 & (D_PIO0 | D_PIO2))) {
1655 printk(KERN_ERR "DBRI: no mmcodec found.\n");
1656 return -EIO;
1657 }
1658
1659 cs4215_setup_pipes(dbri);
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001660 cs4215_init_data(&dbri->mm);
1661
1662 /* Enable capture of the status & version timeslots. */
1663 recv_fixed(dbri, 18, &dbri->mm.status);
1664 recv_fixed(dbri, 19, &dbri->mm.version);
1665
1666 dbri->mm.offset = dbri->mm.onboard ? 0 : 8;
1667 if (cs4215_setctrl(dbri) == -1 || dbri->mm.version == 0xff) {
1668 dprintk(D_MM, "CS4215 failed probe at offset %d\n",
1669 dbri->mm.offset);
1670 return -EIO;
1671 }
1672 dprintk(D_MM, "Found CS4215 at offset %d\n", dbri->mm.offset);
1673
1674 return 0;
1675}
1676
1677/*
1678****************************************************************************
1679*************************** DBRI interrupt handler *************************
1680****************************************************************************
1681
1682The DBRI communicates with the CPU mainly via a circular interrupt
1683buffer. When an interrupt is signaled, the CPU walks through the
1684buffer and calls dbri_process_one_interrupt() for each interrupt word.
1685Complicated interrupts are handled by dedicated functions (which
1686appear first in this file). Any pending interrupts can be serviced by
1687calling dbri_process_interrupt_buffer(), which works even if the CPU's
Krzysztof Helt1be54c82006-08-21 19:30:57 +02001688interrupts are disabled.
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001689
1690*/
1691
1692/* xmit_descs()
1693 *
Krzysztof Helt098ccbc2007-08-20 12:30:54 +02001694 * Starts transmitting the current TD's for recording/playing.
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001695 * For playback, ALSA has filled the DMA memory with new data (we hope).
1696 */
Krzysztof Helt1be54c82006-08-21 19:30:57 +02001697static void xmit_descs(struct snd_dbri *dbri)
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001698{
Takashi Iwai475675d2005-11-17 15:11:51 +01001699 struct dbri_streaminfo *info;
Krzysztof Helt1be54c82006-08-21 19:30:57 +02001700 s32 *cmd;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001701 unsigned long flags;
1702 int first_td;
1703
1704 if (dbri == NULL)
1705 return; /* Disabled */
1706
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001707 info = &dbri->stream_info[DBRI_REC];
1708 spin_lock_irqsave(&dbri->lock, flags);
1709
Krzysztof Helt1be54c82006-08-21 19:30:57 +02001710 if (info->pipe >= 0) {
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001711 first_td = dbri->pipes[info->pipe].first_desc;
1712
1713 dprintk(D_DESC, "xmit_descs rec @ TD %d\n", first_td);
1714
1715 /* Stream could be closed by the time we run. */
Krzysztof Heltaaad3652006-08-28 12:59:23 +02001716 if (first_td >= 0) {
1717 cmd = dbri_cmdlock(dbri, 2);
1718 *(cmd++) = DBRI_CMD(D_SDP, 0,
1719 dbri->pipes[info->pipe].sdp
1720 | D_SDP_P | D_SDP_EVERY | D_SDP_C);
Krzysztof Helt098ccbc2007-08-20 12:30:54 +02001721 *(cmd++) = dbri->dma_dvma +
1722 dbri_dma_off(desc, first_td);
Krzysztof Heltaaad3652006-08-28 12:59:23 +02001723 dbri_cmdsend(dbri, cmd, 2);
1724
1725 /* Reset our admin of the pipe. */
1726 dbri->pipes[info->pipe].desc = first_td;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001727 }
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001728 }
1729
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001730 info = &dbri->stream_info[DBRI_PLAY];
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001731
Krzysztof Helt1be54c82006-08-21 19:30:57 +02001732 if (info->pipe >= 0) {
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001733 first_td = dbri->pipes[info->pipe].first_desc;
1734
1735 dprintk(D_DESC, "xmit_descs play @ TD %d\n", first_td);
1736
1737 /* Stream could be closed by the time we run. */
Krzysztof Helt1be54c82006-08-21 19:30:57 +02001738 if (first_td >= 0) {
1739 cmd = dbri_cmdlock(dbri, 2);
1740 *(cmd++) = DBRI_CMD(D_SDP, 0,
1741 dbri->pipes[info->pipe].sdp
1742 | D_SDP_P | D_SDP_EVERY | D_SDP_C);
Krzysztof Helt098ccbc2007-08-20 12:30:54 +02001743 *(cmd++) = dbri->dma_dvma +
1744 dbri_dma_off(desc, first_td);
Krzysztof Helt1be54c82006-08-21 19:30:57 +02001745 dbri_cmdsend(dbri, cmd, 2);
1746
Krzysztof Heltaaad3652006-08-28 12:59:23 +02001747 /* Reset our admin of the pipe. */
Krzysztof Helt1be54c82006-08-21 19:30:57 +02001748 dbri->pipes[info->pipe].desc = first_td;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001749 }
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001750 }
Krzysztof Heltea543f12006-09-05 20:25:05 +02001751
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001752 spin_unlock_irqrestore(&dbri->lock, flags);
1753}
1754
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001755/* transmission_complete_intr()
1756 *
1757 * Called by main interrupt handler when DBRI signals transmission complete
1758 * on a pipe (interrupt triggered by the B bit in a transmit descriptor).
1759 *
Martin Habets43388292005-09-10 15:39:00 +02001760 * Walks through the pipe's list of transmit buffer descriptors and marks
1761 * them as available. Stops when the first descriptor is found without
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001762 * TBC (Transmit Buffer Complete) set, or we've run through them all.
Martin Habets43388292005-09-10 15:39:00 +02001763 *
Krzysztof Heltab93c7a2006-08-23 11:37:36 +02001764 * The DMA buffers are not released. They form a ring buffer and
1765 * they are filled by ALSA while others are transmitted by DMA.
1766 *
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001767 */
1768
Krzysztof Helt098ccbc2007-08-20 12:30:54 +02001769static void transmission_complete_intr(struct snd_dbri *dbri, int pipe)
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001770{
Krzysztof Heltcf68d212007-09-04 13:09:20 +02001771 struct dbri_streaminfo *info = &dbri->stream_info[DBRI_PLAY];
1772 int td = dbri->pipes[pipe].desc;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001773 int status;
1774
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001775 while (td >= 0) {
1776 if (td >= DBRI_NO_DESCS) {
1777 printk(KERN_ERR "DBRI: invalid td on pipe %d\n", pipe);
1778 return;
1779 }
1780
1781 status = DBRI_TD_STATUS(dbri->dma->desc[td].word4);
Krzysztof Helt098ccbc2007-08-20 12:30:54 +02001782 if (!(status & DBRI_TD_TBC))
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001783 break;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001784
1785 dprintk(D_INT, "TD %d, status 0x%02x\n", td, status);
1786
1787 dbri->dma->desc[td].word4 = 0; /* Reset it for next time. */
Krzysztof Helt1be54c82006-08-21 19:30:57 +02001788 info->offset += DBRI_RD_CNT(dbri->dma->desc[td].word1);
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001789
Krzysztof Heltc2735442006-08-21 19:27:35 +02001790 td = dbri->next_desc[td];
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001791 dbri->pipes[pipe].desc = td;
1792 }
1793
1794 /* Notify ALSA */
Krzysztof Heltcf68d212007-09-04 13:09:20 +02001795 spin_unlock(&dbri->lock);
1796 snd_pcm_period_elapsed(info->substream);
1797 spin_lock(&dbri->lock);
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001798}
1799
Krzysztof Helt098ccbc2007-08-20 12:30:54 +02001800static void reception_complete_intr(struct snd_dbri *dbri, int pipe)
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001801{
Takashi Iwai475675d2005-11-17 15:11:51 +01001802 struct dbri_streaminfo *info;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001803 int rd = dbri->pipes[pipe].desc;
1804 s32 status;
1805
1806 if (rd < 0 || rd >= DBRI_NO_DESCS) {
1807 printk(KERN_ERR "DBRI: invalid rd on pipe %d\n", pipe);
1808 return;
1809 }
1810
Krzysztof Heltc2735442006-08-21 19:27:35 +02001811 dbri->pipes[pipe].desc = dbri->next_desc[rd];
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001812 status = dbri->dma->desc[rd].word1;
1813 dbri->dma->desc[rd].word1 = 0; /* Reset it for next time. */
1814
1815 info = &dbri->stream_info[DBRI_REC];
1816 info->offset += DBRI_RD_CNT(status);
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001817
1818 /* FIXME: Check status */
1819
1820 dprintk(D_INT, "Recv RD %d, status 0x%02x, len %d\n",
1821 rd, DBRI_RD_STATUS(status), DBRI_RD_CNT(status));
1822
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001823 /* Notify ALSA */
Krzysztof Heltcf68d212007-09-04 13:09:20 +02001824 spin_unlock(&dbri->lock);
1825 snd_pcm_period_elapsed(info->substream);
1826 spin_lock(&dbri->lock);
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001827}
1828
Krzysztof Helt098ccbc2007-08-20 12:30:54 +02001829static void dbri_process_one_interrupt(struct snd_dbri *dbri, int x)
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001830{
1831 int val = D_INTR_GETVAL(x);
1832 int channel = D_INTR_GETCHAN(x);
1833 int command = D_INTR_GETCMD(x);
1834 int code = D_INTR_GETCODE(x);
1835#ifdef DBRI_DEBUG
1836 int rval = D_INTR_GETRVAL(x);
1837#endif
1838
1839 if (channel == D_INTR_CMD) {
1840 dprintk(D_CMD, "INTR: Command: %-5s Value:%d\n",
1841 cmds[command], val);
1842 } else {
1843 dprintk(D_INT, "INTR: Chan:%d Code:%d Val:%#x\n",
1844 channel, code, rval);
1845 }
1846
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001847 switch (code) {
Krzysztof Helt1be54c82006-08-21 19:30:57 +02001848 case D_INTR_CMDI:
1849 if (command != D_WAIT)
1850 printk(KERN_ERR "DBRI: Command read interrupt\n");
1851 break;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001852 case D_INTR_BRDY:
1853 reception_complete_intr(dbri, channel);
1854 break;
1855 case D_INTR_XCMP:
1856 case D_INTR_MINT:
1857 transmission_complete_intr(dbri, channel);
1858 break;
1859 case D_INTR_UNDR:
1860 /* UNDR - Transmission underrun
1861 * resend SDP command with clear pipe bit (C) set
1862 */
1863 {
Krzysztof Helt1be54c82006-08-21 19:30:57 +02001864 /* FIXME: do something useful in case of underrun */
1865 printk(KERN_ERR "DBRI: Underrun error\n");
1866#if 0
1867 s32 *cmd;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001868 int pipe = channel;
1869 int td = dbri->pipes[pipe].desc;
1870
1871 dbri->dma->desc[td].word4 = 0;
1872 cmd = dbri_cmdlock(dbri, NoGetLock);
1873 *(cmd++) = DBRI_CMD(D_SDP, 0,
1874 dbri->pipes[pipe].sdp
1875 | D_SDP_P | D_SDP_C | D_SDP_2SAME);
1876 *(cmd++) = dbri->dma_dvma + dbri_dma_off(desc, td);
1877 dbri_cmdsend(dbri, cmd);
Krzysztof Helt1be54c82006-08-21 19:30:57 +02001878#endif
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001879 }
1880 break;
1881 case D_INTR_FXDT:
1882 /* FXDT - Fixed data change */
1883 if (dbri->pipes[channel].sdp & D_SDP_MSB)
1884 val = reverse_bytes(val, dbri->pipes[channel].length);
1885
1886 if (dbri->pipes[channel].recv_fixed_ptr)
1887 *(dbri->pipes[channel].recv_fixed_ptr) = val;
1888 break;
1889 default:
1890 if (channel != D_INTR_CMD)
1891 printk(KERN_WARNING
1892 "DBRI: Ignored Interrupt: %d (0x%x)\n", code, x);
1893 }
1894}
1895
1896/* dbri_process_interrupt_buffer advances through the DBRI's interrupt
1897 * buffer until it finds a zero word (indicating nothing more to do
1898 * right now). Non-zero words require processing and are handed off
Krzysztof Helt1be54c82006-08-21 19:30:57 +02001899 * to dbri_process_one_interrupt AFTER advancing the pointer.
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001900 */
Krzysztof Helt098ccbc2007-08-20 12:30:54 +02001901static void dbri_process_interrupt_buffer(struct snd_dbri *dbri)
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001902{
1903 s32 x;
1904
1905 while ((x = dbri->dma->intr[dbri->dbri_irqp]) != 0) {
1906 dbri->dma->intr[dbri->dbri_irqp] = 0;
1907 dbri->dbri_irqp++;
Krzysztof Helt6fb98282006-08-16 12:54:29 +02001908 if (dbri->dbri_irqp == DBRI_INT_BLK)
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001909 dbri->dbri_irqp = 1;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001910
1911 dbri_process_one_interrupt(dbri, x);
1912 }
1913}
1914
David Howells7d12e782006-10-05 14:55:46 +01001915static irqreturn_t snd_dbri_interrupt(int irq, void *dev_id)
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001916{
Takashi Iwai475675d2005-11-17 15:11:51 +01001917 struct snd_dbri *dbri = dev_id;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001918 static int errcnt = 0;
1919 int x;
1920
1921 if (dbri == NULL)
1922 return IRQ_NONE;
1923 spin_lock(&dbri->lock);
1924
1925 /*
1926 * Read it, so the interrupt goes away.
1927 */
1928 x = sbus_readl(dbri->regs + REG1);
1929
1930 if (x & (D_MRR | D_MLE | D_LBG | D_MBE)) {
1931 u32 tmp;
1932
1933 if (x & D_MRR)
1934 printk(KERN_ERR
1935 "DBRI: Multiple Error Ack on SBus reg1=0x%x\n",
1936 x);
1937 if (x & D_MLE)
1938 printk(KERN_ERR
1939 "DBRI: Multiple Late Error on SBus reg1=0x%x\n",
1940 x);
1941 if (x & D_LBG)
1942 printk(KERN_ERR
1943 "DBRI: Lost Bus Grant on SBus reg1=0x%x\n", x);
1944 if (x & D_MBE)
1945 printk(KERN_ERR
1946 "DBRI: Burst Error on SBus reg1=0x%x\n", x);
1947
1948 /* Some of these SBus errors cause the chip's SBus circuitry
1949 * to be disabled, so just re-enable and try to keep going.
1950 *
1951 * The only one I've seen is MRR, which will be triggered
1952 * if you let a transmit pipe underrun, then try to CDP it.
1953 *
Martin Habets43388292005-09-10 15:39:00 +02001954 * If these things persist, we reset the chip.
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001955 */
1956 if ((++errcnt) % 10 == 0) {
1957 dprintk(D_INT, "Interrupt errors exceeded.\n");
1958 dbri_reset(dbri);
1959 } else {
1960 tmp = sbus_readl(dbri->regs + REG0);
1961 tmp &= ~(D_D);
1962 sbus_writel(tmp, dbri->regs + REG0);
1963 }
1964 }
1965
1966 dbri_process_interrupt_buffer(dbri);
1967
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001968 spin_unlock(&dbri->lock);
1969
1970 return IRQ_HANDLED;
1971}
1972
1973/****************************************************************************
1974 PCM Interface
1975****************************************************************************/
Takashi Iwai475675d2005-11-17 15:11:51 +01001976static struct snd_pcm_hardware snd_dbri_pcm_hw = {
Krzysztof Heltcf68d212007-09-04 13:09:20 +02001977 .info = SNDRV_PCM_INFO_MMAP |
1978 SNDRV_PCM_INFO_INTERLEAVED |
1979 SNDRV_PCM_INFO_BLOCK_TRANSFER |
Takashi Iwai2008f132009-04-28 12:25:59 +02001980 SNDRV_PCM_INFO_MMAP_VALID |
1981 SNDRV_PCM_INFO_BATCH,
Krzysztof Helt098ccbc2007-08-20 12:30:54 +02001982 .formats = SNDRV_PCM_FMTBIT_MU_LAW |
1983 SNDRV_PCM_FMTBIT_A_LAW |
1984 SNDRV_PCM_FMTBIT_U8 |
1985 SNDRV_PCM_FMTBIT_S16_BE,
1986 .rates = SNDRV_PCM_RATE_8000_48000 | SNDRV_PCM_RATE_5512,
Krzysztof Heltab93c7a2006-08-23 11:37:36 +02001987 .rate_min = 5512,
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001988 .rate_max = 48000,
1989 .channels_min = 1,
1990 .channels_max = 2,
Krzysztof Heltcf68d212007-09-04 13:09:20 +02001991 .buffer_bytes_max = 64 * 1024,
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02001992 .period_bytes_min = 1,
1993 .period_bytes_max = DBRI_TD_MAXCNT,
1994 .periods_min = 1,
1995 .periods_max = 1024,
1996};
1997
Krzysztof Heltab93c7a2006-08-23 11:37:36 +02001998static int snd_hw_rule_format(struct snd_pcm_hw_params *params,
1999 struct snd_pcm_hw_rule *rule)
2000{
2001 struct snd_interval *c = hw_param_interval(params,
2002 SNDRV_PCM_HW_PARAM_CHANNELS);
2003 struct snd_mask *f = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
2004 struct snd_mask fmt;
2005
2006 snd_mask_any(&fmt);
2007 if (c->min > 1) {
2008 fmt.bits[0] &= SNDRV_PCM_FMTBIT_S16_BE;
2009 return snd_mask_refine(f, &fmt);
2010 }
2011 return 0;
2012}
2013
2014static int snd_hw_rule_channels(struct snd_pcm_hw_params *params,
2015 struct snd_pcm_hw_rule *rule)
2016{
2017 struct snd_interval *c = hw_param_interval(params,
2018 SNDRV_PCM_HW_PARAM_CHANNELS);
2019 struct snd_mask *f = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
2020 struct snd_interval ch;
2021
2022 snd_interval_any(&ch);
2023 if (!(f->bits[0] & SNDRV_PCM_FMTBIT_S16_BE)) {
Krzysztof Helt098ccbc2007-08-20 12:30:54 +02002024 ch.min = 1;
2025 ch.max = 1;
Krzysztof Heltab93c7a2006-08-23 11:37:36 +02002026 ch.integer = 1;
2027 return snd_interval_refine(c, &ch);
2028 }
2029 return 0;
2030}
2031
Takashi Iwai475675d2005-11-17 15:11:51 +01002032static int snd_dbri_open(struct snd_pcm_substream *substream)
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002033{
Takashi Iwai475675d2005-11-17 15:11:51 +01002034 struct snd_dbri *dbri = snd_pcm_substream_chip(substream);
2035 struct snd_pcm_runtime *runtime = substream->runtime;
2036 struct dbri_streaminfo *info = DBRI_STREAM(dbri, substream);
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002037 unsigned long flags;
2038
2039 dprintk(D_USR, "open audio output.\n");
2040 runtime->hw = snd_dbri_pcm_hw;
2041
2042 spin_lock_irqsave(&dbri->lock, flags);
2043 info->substream = substream;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002044 info->offset = 0;
2045 info->dvma_buffer = 0;
2046 info->pipe = -1;
2047 spin_unlock_irqrestore(&dbri->lock, flags);
2048
Krzysztof Helt098ccbc2007-08-20 12:30:54 +02002049 snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
Al Viroae97dd92006-09-24 23:42:57 +01002050 snd_hw_rule_format, NULL, SNDRV_PCM_HW_PARAM_FORMAT,
Krzysztof Heltab93c7a2006-08-23 11:37:36 +02002051 -1);
Krzysztof Helt098ccbc2007-08-20 12:30:54 +02002052 snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
2053 snd_hw_rule_channels, NULL,
Krzysztof Heltab93c7a2006-08-23 11:37:36 +02002054 SNDRV_PCM_HW_PARAM_CHANNELS,
2055 -1);
Krzysztof Helt098ccbc2007-08-20 12:30:54 +02002056
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002057 cs4215_open(dbri);
2058
2059 return 0;
2060}
2061
Takashi Iwai475675d2005-11-17 15:11:51 +01002062static int snd_dbri_close(struct snd_pcm_substream *substream)
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002063{
Takashi Iwai475675d2005-11-17 15:11:51 +01002064 struct snd_dbri *dbri = snd_pcm_substream_chip(substream);
2065 struct dbri_streaminfo *info = DBRI_STREAM(dbri, substream);
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002066
2067 dprintk(D_USR, "close audio output.\n");
2068 info->substream = NULL;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002069 info->offset = 0;
2070
2071 return 0;
2072}
2073
Takashi Iwai475675d2005-11-17 15:11:51 +01002074static int snd_dbri_hw_params(struct snd_pcm_substream *substream,
2075 struct snd_pcm_hw_params *hw_params)
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002076{
Takashi Iwai475675d2005-11-17 15:11:51 +01002077 struct snd_pcm_runtime *runtime = substream->runtime;
2078 struct snd_dbri *dbri = snd_pcm_substream_chip(substream);
2079 struct dbri_streaminfo *info = DBRI_STREAM(dbri, substream);
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002080 int direction;
2081 int ret;
2082
2083 /* set sampling rate, audio format and number of channels */
2084 ret = cs4215_prepare(dbri, params_rate(hw_params),
2085 params_format(hw_params),
2086 params_channels(hw_params));
2087 if (ret != 0)
2088 return ret;
2089
2090 if ((ret = snd_pcm_lib_malloc_pages(substream,
2091 params_buffer_bytes(hw_params))) < 0) {
Martin Habets43388292005-09-10 15:39:00 +02002092 printk(KERN_ERR "malloc_pages failed with %d\n", ret);
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002093 return ret;
2094 }
2095
2096 /* hw_params can get called multiple times. Only map the DMA once.
2097 */
2098 if (info->dvma_buffer == 0) {
2099 if (DBRI_STREAMNO(substream) == DBRI_PLAY)
David S. Miller738f2b72008-08-27 18:09:11 -07002100 direction = DMA_TO_DEVICE;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002101 else
David S. Miller738f2b72008-08-27 18:09:11 -07002102 direction = DMA_FROM_DEVICE;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002103
David S. Miller7a715f42008-08-27 18:37:58 -07002104 info->dvma_buffer =
David S. Miller2bd320f2008-08-27 00:30:59 -07002105 dma_map_single(&dbri->op->dev,
David S. Miller738f2b72008-08-27 18:09:11 -07002106 runtime->dma_area,
2107 params_buffer_bytes(hw_params),
2108 direction);
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002109 }
2110
2111 direction = params_buffer_bytes(hw_params);
2112 dprintk(D_USR, "hw_params: %d bytes, dvma=%x\n",
2113 direction, info->dvma_buffer);
2114 return 0;
2115}
2116
Takashi Iwai475675d2005-11-17 15:11:51 +01002117static int snd_dbri_hw_free(struct snd_pcm_substream *substream)
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002118{
Takashi Iwai475675d2005-11-17 15:11:51 +01002119 struct snd_dbri *dbri = snd_pcm_substream_chip(substream);
2120 struct dbri_streaminfo *info = DBRI_STREAM(dbri, substream);
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002121 int direction;
Krzysztof Helt99dabfe2006-08-28 13:00:45 +02002122
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002123 dprintk(D_USR, "hw_free.\n");
2124
2125 /* hw_free can get called multiple times. Only unmap the DMA once.
2126 */
2127 if (info->dvma_buffer) {
2128 if (DBRI_STREAMNO(substream) == DBRI_PLAY)
David S. Miller738f2b72008-08-27 18:09:11 -07002129 direction = DMA_TO_DEVICE;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002130 else
David S. Miller738f2b72008-08-27 18:09:11 -07002131 direction = DMA_FROM_DEVICE;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002132
David S. Miller2bd320f2008-08-27 00:30:59 -07002133 dma_unmap_single(&dbri->op->dev, info->dvma_buffer,
David S. Miller738f2b72008-08-27 18:09:11 -07002134 substream->runtime->buffer_size, direction);
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002135 info->dvma_buffer = 0;
2136 }
Krzysztof Helt99dabfe2006-08-28 13:00:45 +02002137 if (info->pipe != -1) {
2138 reset_pipe(dbri, info->pipe);
2139 info->pipe = -1;
2140 }
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002141
2142 return snd_pcm_lib_free_pages(substream);
2143}
2144
Takashi Iwai475675d2005-11-17 15:11:51 +01002145static int snd_dbri_prepare(struct snd_pcm_substream *substream)
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002146{
Takashi Iwai475675d2005-11-17 15:11:51 +01002147 struct snd_dbri *dbri = snd_pcm_substream_chip(substream);
2148 struct dbri_streaminfo *info = DBRI_STREAM(dbri, substream);
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002149 int ret;
2150
2151 info->size = snd_pcm_lib_buffer_bytes(substream);
2152 if (DBRI_STREAMNO(substream) == DBRI_PLAY)
2153 info->pipe = 4; /* Send pipe */
Krzysztof Helt1be54c82006-08-21 19:30:57 +02002154 else
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002155 info->pipe = 6; /* Receive pipe */
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002156
2157 spin_lock_irq(&dbri->lock);
Krzysztof Heltaaad3652006-08-28 12:59:23 +02002158 info->offset = 0;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002159
Krzysztof Helt098ccbc2007-08-20 12:30:54 +02002160 /* Setup the all the transmit/receive descriptors to cover the
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002161 * whole DMA buffer.
2162 */
2163 ret = setup_descs(dbri, DBRI_STREAMNO(substream),
2164 snd_pcm_lib_period_bytes(substream));
2165
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002166 spin_unlock_irq(&dbri->lock);
2167
2168 dprintk(D_USR, "prepare audio output. %d bytes\n", info->size);
2169 return ret;
2170}
2171
Takashi Iwai475675d2005-11-17 15:11:51 +01002172static int snd_dbri_trigger(struct snd_pcm_substream *substream, int cmd)
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002173{
Takashi Iwai475675d2005-11-17 15:11:51 +01002174 struct snd_dbri *dbri = snd_pcm_substream_chip(substream);
2175 struct dbri_streaminfo *info = DBRI_STREAM(dbri, substream);
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002176 int ret = 0;
2177
2178 switch (cmd) {
2179 case SNDRV_PCM_TRIGGER_START:
2180 dprintk(D_USR, "start audio, period is %d bytes\n",
2181 (int)snd_pcm_lib_period_bytes(substream));
Krzysztof Helt1be54c82006-08-21 19:30:57 +02002182 /* Re-submit the TDs. */
2183 xmit_descs(dbri);
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002184 break;
2185 case SNDRV_PCM_TRIGGER_STOP:
2186 dprintk(D_USR, "stop audio.\n");
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002187 reset_pipe(dbri, info->pipe);
2188 break;
2189 default:
2190 ret = -EINVAL;
2191 }
2192
2193 return ret;
2194}
2195
Takashi Iwai475675d2005-11-17 15:11:51 +01002196static snd_pcm_uframes_t snd_dbri_pointer(struct snd_pcm_substream *substream)
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002197{
Takashi Iwai475675d2005-11-17 15:11:51 +01002198 struct snd_dbri *dbri = snd_pcm_substream_chip(substream);
2199 struct dbri_streaminfo *info = DBRI_STREAM(dbri, substream);
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002200 snd_pcm_uframes_t ret;
2201
2202 ret = bytes_to_frames(substream->runtime, info->offset)
2203 % substream->runtime->buffer_size;
Krzysztof Helt1be54c82006-08-21 19:30:57 +02002204 dprintk(D_USR, "I/O pointer: %ld frames of %ld.\n",
2205 ret, substream->runtime->buffer_size);
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002206 return ret;
2207}
2208
Takashi Iwai475675d2005-11-17 15:11:51 +01002209static struct snd_pcm_ops snd_dbri_ops = {
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002210 .open = snd_dbri_open,
2211 .close = snd_dbri_close,
2212 .ioctl = snd_pcm_lib_ioctl,
2213 .hw_params = snd_dbri_hw_params,
2214 .hw_free = snd_dbri_hw_free,
2215 .prepare = snd_dbri_prepare,
2216 .trigger = snd_dbri_trigger,
2217 .pointer = snd_dbri_pointer,
2218};
2219
Bill Pemberton32e02a72012-12-06 12:35:25 -05002220static int snd_dbri_pcm(struct snd_card *card)
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002221{
Takashi Iwai475675d2005-11-17 15:11:51 +01002222 struct snd_pcm *pcm;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002223 int err;
2224
Krzysztof Heltafeacfd2007-09-05 15:05:08 +02002225 if ((err = snd_pcm_new(card,
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002226 /* ID */ "sun_dbri",
2227 /* device */ 0,
2228 /* playback count */ 1,
2229 /* capture count */ 1, &pcm)) < 0)
2230 return err;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002231
2232 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_dbri_ops);
2233 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_dbri_ops);
2234
Krzysztof Heltafeacfd2007-09-05 15:05:08 +02002235 pcm->private_data = card->private_data;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002236 pcm->info_flags = 0;
Krzysztof Heltafeacfd2007-09-05 15:05:08 +02002237 strcpy(pcm->name, card->shortname);
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002238
2239 if ((err = snd_pcm_lib_preallocate_pages_for_all(pcm,
2240 SNDRV_DMA_TYPE_CONTINUOUS,
2241 snd_dma_continuous_data(GFP_KERNEL),
Krzysztof Helt098ccbc2007-08-20 12:30:54 +02002242 64 * 1024, 64 * 1024)) < 0)
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002243 return err;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002244
2245 return 0;
2246}
2247
2248/*****************************************************************************
2249 Mixer interface
2250*****************************************************************************/
2251
Takashi Iwai475675d2005-11-17 15:11:51 +01002252static int snd_cs4215_info_volume(struct snd_kcontrol *kcontrol,
2253 struct snd_ctl_elem_info *uinfo)
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002254{
2255 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2256 uinfo->count = 2;
2257 uinfo->value.integer.min = 0;
Krzysztof Heltcf68d212007-09-04 13:09:20 +02002258 if (kcontrol->private_value == DBRI_PLAY)
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002259 uinfo->value.integer.max = DBRI_MAX_VOLUME;
Krzysztof Heltcf68d212007-09-04 13:09:20 +02002260 else
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002261 uinfo->value.integer.max = DBRI_MAX_GAIN;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002262 return 0;
2263}
2264
Takashi Iwai475675d2005-11-17 15:11:51 +01002265static int snd_cs4215_get_volume(struct snd_kcontrol *kcontrol,
2266 struct snd_ctl_elem_value *ucontrol)
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002267{
Takashi Iwai475675d2005-11-17 15:11:51 +01002268 struct snd_dbri *dbri = snd_kcontrol_chip(kcontrol);
2269 struct dbri_streaminfo *info;
Takashi Iwai5e246b82008-08-08 17:12:47 +02002270
2271 if (snd_BUG_ON(!dbri))
2272 return -EINVAL;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002273 info = &dbri->stream_info[kcontrol->private_value];
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002274
2275 ucontrol->value.integer.value[0] = info->left_gain;
2276 ucontrol->value.integer.value[1] = info->right_gain;
2277 return 0;
2278}
2279
Takashi Iwai475675d2005-11-17 15:11:51 +01002280static int snd_cs4215_put_volume(struct snd_kcontrol *kcontrol,
2281 struct snd_ctl_elem_value *ucontrol)
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002282{
Takashi Iwai475675d2005-11-17 15:11:51 +01002283 struct snd_dbri *dbri = snd_kcontrol_chip(kcontrol);
Krzysztof Helt098ccbc2007-08-20 12:30:54 +02002284 struct dbri_streaminfo *info =
2285 &dbri->stream_info[kcontrol->private_value];
Takashi Iwai3b892462007-11-15 16:17:24 +01002286 unsigned int vol[2];
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002287 int changed = 0;
2288
Takashi Iwai3b892462007-11-15 16:17:24 +01002289 vol[0] = ucontrol->value.integer.value[0];
2290 vol[1] = ucontrol->value.integer.value[1];
2291 if (kcontrol->private_value == DBRI_PLAY) {
2292 if (vol[0] > DBRI_MAX_VOLUME || vol[1] > DBRI_MAX_VOLUME)
2293 return -EINVAL;
2294 } else {
2295 if (vol[0] > DBRI_MAX_GAIN || vol[1] > DBRI_MAX_GAIN)
2296 return -EINVAL;
2297 }
2298
Takashi Iwai4581aa32007-11-20 18:31:22 +01002299 if (info->left_gain != vol[0]) {
2300 info->left_gain = vol[0];
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002301 changed = 1;
2302 }
Takashi Iwai4581aa32007-11-20 18:31:22 +01002303 if (info->right_gain != vol[1]) {
2304 info->right_gain = vol[1];
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002305 changed = 1;
2306 }
Krzysztof Heltcf68d212007-09-04 13:09:20 +02002307 if (changed) {
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002308 /* First mute outputs, and wait 1/8000 sec (125 us)
2309 * to make sure this takes. This avoids clicking noises.
2310 */
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002311 cs4215_setdata(dbri, 1);
2312 udelay(125);
2313 cs4215_setdata(dbri, 0);
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002314 }
2315 return changed;
2316}
2317
Takashi Iwai475675d2005-11-17 15:11:51 +01002318static int snd_cs4215_info_single(struct snd_kcontrol *kcontrol,
2319 struct snd_ctl_elem_info *uinfo)
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002320{
2321 int mask = (kcontrol->private_value >> 16) & 0xff;
2322
2323 uinfo->type = (mask == 1) ?
2324 SNDRV_CTL_ELEM_TYPE_BOOLEAN : SNDRV_CTL_ELEM_TYPE_INTEGER;
2325 uinfo->count = 1;
2326 uinfo->value.integer.min = 0;
2327 uinfo->value.integer.max = mask;
2328 return 0;
2329}
2330
Takashi Iwai475675d2005-11-17 15:11:51 +01002331static int snd_cs4215_get_single(struct snd_kcontrol *kcontrol,
2332 struct snd_ctl_elem_value *ucontrol)
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002333{
Takashi Iwai475675d2005-11-17 15:11:51 +01002334 struct snd_dbri *dbri = snd_kcontrol_chip(kcontrol);
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002335 int elem = kcontrol->private_value & 0xff;
2336 int shift = (kcontrol->private_value >> 8) & 0xff;
2337 int mask = (kcontrol->private_value >> 16) & 0xff;
2338 int invert = (kcontrol->private_value >> 24) & 1;
Takashi Iwai5e246b82008-08-08 17:12:47 +02002339
2340 if (snd_BUG_ON(!dbri))
2341 return -EINVAL;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002342
Krzysztof Helt098ccbc2007-08-20 12:30:54 +02002343 if (elem < 4)
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002344 ucontrol->value.integer.value[0] =
2345 (dbri->mm.data[elem] >> shift) & mask;
Krzysztof Helt098ccbc2007-08-20 12:30:54 +02002346 else
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002347 ucontrol->value.integer.value[0] =
2348 (dbri->mm.ctrl[elem - 4] >> shift) & mask;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002349
Krzysztof Helt098ccbc2007-08-20 12:30:54 +02002350 if (invert == 1)
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002351 ucontrol->value.integer.value[0] =
2352 mask - ucontrol->value.integer.value[0];
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002353 return 0;
2354}
2355
Takashi Iwai475675d2005-11-17 15:11:51 +01002356static int snd_cs4215_put_single(struct snd_kcontrol *kcontrol,
2357 struct snd_ctl_elem_value *ucontrol)
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002358{
Takashi Iwai475675d2005-11-17 15:11:51 +01002359 struct snd_dbri *dbri = snd_kcontrol_chip(kcontrol);
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002360 int elem = kcontrol->private_value & 0xff;
2361 int shift = (kcontrol->private_value >> 8) & 0xff;
2362 int mask = (kcontrol->private_value >> 16) & 0xff;
2363 int invert = (kcontrol->private_value >> 24) & 1;
2364 int changed = 0;
2365 unsigned short val;
Takashi Iwai5e246b82008-08-08 17:12:47 +02002366
2367 if (snd_BUG_ON(!dbri))
2368 return -EINVAL;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002369
2370 val = (ucontrol->value.integer.value[0] & mask);
2371 if (invert == 1)
2372 val = mask - val;
2373 val <<= shift;
2374
2375 if (elem < 4) {
2376 dbri->mm.data[elem] = (dbri->mm.data[elem] &
2377 ~(mask << shift)) | val;
2378 changed = (val != dbri->mm.data[elem]);
2379 } else {
2380 dbri->mm.ctrl[elem - 4] = (dbri->mm.ctrl[elem - 4] &
2381 ~(mask << shift)) | val;
2382 changed = (val != dbri->mm.ctrl[elem - 4]);
2383 }
2384
2385 dprintk(D_GEN, "put_single: mask=0x%x, changed=%d, "
2386 "mixer-value=%ld, mm-value=0x%x\n",
2387 mask, changed, ucontrol->value.integer.value[0],
2388 dbri->mm.data[elem & 3]);
2389
2390 if (changed) {
2391 /* First mute outputs, and wait 1/8000 sec (125 us)
2392 * to make sure this takes. This avoids clicking noises.
2393 */
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002394 cs4215_setdata(dbri, 1);
2395 udelay(125);
2396 cs4215_setdata(dbri, 0);
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002397 }
2398 return changed;
2399}
2400
2401/* Entries 0-3 map to the 4 data timeslots, entries 4-7 map to the 4 control
2402 timeslots. Shift is the bit offset in the timeslot, mask defines the
2403 number of bits. invert is a boolean for use with attenuation.
2404 */
Krzysztof Helt098ccbc2007-08-20 12:30:54 +02002405#define CS4215_SINGLE(xname, entry, shift, mask, invert) \
2406{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = (xname), \
2407 .info = snd_cs4215_info_single, \
2408 .get = snd_cs4215_get_single, .put = snd_cs4215_put_single, \
2409 .private_value = (entry) | ((shift) << 8) | ((mask) << 16) | \
2410 ((invert) << 24) },
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002411
Bill Pemberton32e02a72012-12-06 12:35:25 -05002412static struct snd_kcontrol_new dbri_controls[] = {
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002413 {
2414 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
2415 .name = "Playback Volume",
2416 .info = snd_cs4215_info_volume,
2417 .get = snd_cs4215_get_volume,
2418 .put = snd_cs4215_put_volume,
2419 .private_value = DBRI_PLAY,
2420 },
2421 CS4215_SINGLE("Headphone switch", 0, 7, 1, 0)
2422 CS4215_SINGLE("Line out switch", 0, 6, 1, 0)
2423 CS4215_SINGLE("Speaker switch", 1, 6, 1, 0)
2424 {
2425 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
2426 .name = "Capture Volume",
2427 .info = snd_cs4215_info_volume,
2428 .get = snd_cs4215_get_volume,
2429 .put = snd_cs4215_put_volume,
2430 .private_value = DBRI_REC,
2431 },
2432 /* FIXME: mic/line switch */
2433 CS4215_SINGLE("Line in switch", 2, 4, 1, 0)
2434 CS4215_SINGLE("High Pass Filter switch", 5, 7, 1, 0)
2435 CS4215_SINGLE("Monitor Volume", 3, 4, 0xf, 1)
2436 CS4215_SINGLE("Mic boost", 4, 4, 1, 1)
2437};
2438
Bill Pemberton32e02a72012-12-06 12:35:25 -05002439static int snd_dbri_mixer(struct snd_card *card)
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002440{
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002441 int idx, err;
Krzysztof Heltafeacfd2007-09-05 15:05:08 +02002442 struct snd_dbri *dbri;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002443
Takashi Iwai5e246b82008-08-08 17:12:47 +02002444 if (snd_BUG_ON(!card || !card->private_data))
2445 return -EINVAL;
Krzysztof Heltafeacfd2007-09-05 15:05:08 +02002446 dbri = card->private_data;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002447
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002448 strcpy(card->mixername, card->shortname);
2449
Tobias Klauser6c2d8b52006-09-29 02:00:21 -07002450 for (idx = 0; idx < ARRAY_SIZE(dbri_controls); idx++) {
Krzysztof Heltcf68d212007-09-04 13:09:20 +02002451 err = snd_ctl_add(card,
2452 snd_ctl_new1(&dbri_controls[idx], dbri));
2453 if (err < 0)
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002454 return err;
2455 }
2456
2457 for (idx = DBRI_REC; idx < DBRI_NO_STREAMS; idx++) {
2458 dbri->stream_info[idx].left_gain = 0;
2459 dbri->stream_info[idx].right_gain = 0;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002460 }
2461
2462 return 0;
2463}
2464
2465/****************************************************************************
2466 /proc interface
2467****************************************************************************/
Krzysztof Helt098ccbc2007-08-20 12:30:54 +02002468static void dbri_regs_read(struct snd_info_entry *entry,
2469 struct snd_info_buffer *buffer)
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002470{
Takashi Iwai475675d2005-11-17 15:11:51 +01002471 struct snd_dbri *dbri = entry->private_data;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002472
2473 snd_iprintf(buffer, "REG0: 0x%x\n", sbus_readl(dbri->regs + REG0));
2474 snd_iprintf(buffer, "REG2: 0x%x\n", sbus_readl(dbri->regs + REG2));
2475 snd_iprintf(buffer, "REG8: 0x%x\n", sbus_readl(dbri->regs + REG8));
2476 snd_iprintf(buffer, "REG9: 0x%x\n", sbus_readl(dbri->regs + REG9));
2477}
2478
2479#ifdef DBRI_DEBUG
Krzysztof Helt098ccbc2007-08-20 12:30:54 +02002480static void dbri_debug_read(struct snd_info_entry *entry,
Takashi Iwai475675d2005-11-17 15:11:51 +01002481 struct snd_info_buffer *buffer)
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002482{
Takashi Iwai475675d2005-11-17 15:11:51 +01002483 struct snd_dbri *dbri = entry->private_data;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002484 int pipe;
2485 snd_iprintf(buffer, "debug=%d\n", dbri_debug);
2486
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002487 for (pipe = 0; pipe < 32; pipe++) {
2488 if (pipe_active(dbri, pipe)) {
2489 struct dbri_pipe *pptr = &dbri->pipes[pipe];
2490 snd_iprintf(buffer,
2491 "Pipe %d: %s SDP=0x%x desc=%d, "
Krzysztof Helt294a30d2006-08-21 19:29:59 +02002492 "len=%d next %d\n",
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002493 pipe,
Krzysztof Heltcf68d212007-09-04 13:09:20 +02002494 (pptr->sdp & D_SDP_TO_SER) ? "output" :
2495 "input",
Krzysztof Helt5fc3a2b2006-08-17 16:58:45 +02002496 pptr->sdp, pptr->desc,
Krzysztof Helt294a30d2006-08-21 19:29:59 +02002497 pptr->length, pptr->nextpipe);
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002498 }
2499 }
2500}
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002501#endif
2502
Bill Pemberton32e02a72012-12-06 12:35:25 -05002503static void snd_dbri_proc(struct snd_card *card)
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002504{
Krzysztof Heltafeacfd2007-09-05 15:05:08 +02002505 struct snd_dbri *dbri = card->private_data;
Takashi Iwai475675d2005-11-17 15:11:51 +01002506 struct snd_info_entry *entry;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002507
Krzysztof Heltafeacfd2007-09-05 15:05:08 +02002508 if (!snd_card_proc_new(card, "regs", &entry))
Takashi Iwaibf850202006-04-28 15:13:41 +02002509 snd_info_set_text_ops(entry, dbri, dbri_regs_read);
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002510
2511#ifdef DBRI_DEBUG
Krzysztof Heltafeacfd2007-09-05 15:05:08 +02002512 if (!snd_card_proc_new(card, "debug", &entry)) {
Takashi Iwaibf850202006-04-28 15:13:41 +02002513 snd_info_set_text_ops(entry, dbri, dbri_debug_read);
Takashi Iwai8cb7b632005-12-01 10:48:37 +01002514 entry->mode = S_IFREG | S_IRUGO; /* Readable only. */
2515 }
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002516#endif
2517}
2518
2519/*
2520****************************************************************************
2521**************************** Initialization ********************************
2522****************************************************************************
2523*/
Krzysztof Helt098ccbc2007-08-20 12:30:54 +02002524static void snd_dbri_free(struct snd_dbri *dbri);
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002525
Bill Pemberton32e02a72012-12-06 12:35:25 -05002526static int snd_dbri_create(struct snd_card *card,
2527 struct platform_device *op,
2528 int irq, int dev)
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002529{
Takashi Iwai475675d2005-11-17 15:11:51 +01002530 struct snd_dbri *dbri = card->private_data;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002531 int err;
2532
2533 spin_lock_init(&dbri->lock);
David S. Miller2bd320f2008-08-27 00:30:59 -07002534 dbri->op = op;
Krzysztof Heltafeacfd2007-09-05 15:05:08 +02002535 dbri->irq = irq;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002536
Joe Perches7f0f2042014-06-15 13:37:55 -07002537 dbri->dma = dma_zalloc_coherent(&op->dev, sizeof(struct dbri_dma),
2538 &dbri->dma_dvma, GFP_ATOMIC);
FUJITA Tomonoribe376642008-10-29 15:34:39 -07002539 if (!dbri->dma)
2540 return -ENOMEM;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002541
2542 dprintk(D_GEN, "DMA Cmd Block 0x%p (0x%08x)\n",
2543 dbri->dma, dbri->dma_dvma);
2544
2545 /* Map the registers into memory. */
David S. Miller2bd320f2008-08-27 00:30:59 -07002546 dbri->regs_size = resource_size(&op->resource[0]);
2547 dbri->regs = of_ioremap(&op->resource[0], 0,
2548 dbri->regs_size, "DBRI Registers");
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002549 if (!dbri->regs) {
2550 printk(KERN_ERR "DBRI: could not allocate registers\n");
David S. Miller2bd320f2008-08-27 00:30:59 -07002551 dma_free_coherent(&op->dev, sizeof(struct dbri_dma),
David S. Miller738f2b72008-08-27 18:09:11 -07002552 (void *)dbri->dma, dbri->dma_dvma);
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002553 return -EIO;
2554 }
2555
Thomas Gleixner65ca68b2006-07-01 19:29:46 -07002556 err = request_irq(dbri->irq, snd_dbri_interrupt, IRQF_SHARED,
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002557 "DBRI audio", dbri);
2558 if (err) {
2559 printk(KERN_ERR "DBRI: Can't get irq %d\n", dbri->irq);
David S. Miller2bd320f2008-08-27 00:30:59 -07002560 of_iounmap(&op->resource[0], dbri->regs, dbri->regs_size);
2561 dma_free_coherent(&op->dev, sizeof(struct dbri_dma),
David S. Miller738f2b72008-08-27 18:09:11 -07002562 (void *)dbri->dma, dbri->dma_dvma);
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002563 return err;
2564 }
2565
2566 /* Do low level initialization of the DBRI and CS4215 chips */
2567 dbri_initialize(dbri);
2568 err = cs4215_init(dbri);
2569 if (err) {
2570 snd_dbri_free(dbri);
2571 return err;
2572 }
2573
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002574 return 0;
2575}
2576
Krzysztof Helt098ccbc2007-08-20 12:30:54 +02002577static void snd_dbri_free(struct snd_dbri *dbri)
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002578{
2579 dprintk(D_GEN, "snd_dbri_free\n");
2580 dbri_reset(dbri);
2581
2582 if (dbri->irq)
2583 free_irq(dbri->irq, dbri);
2584
2585 if (dbri->regs)
David S. Miller2bd320f2008-08-27 00:30:59 -07002586 of_iounmap(&dbri->op->resource[0], dbri->regs, dbri->regs_size);
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002587
2588 if (dbri->dma)
David S. Miller2bd320f2008-08-27 00:30:59 -07002589 dma_free_coherent(&dbri->op->dev,
David S. Miller738f2b72008-08-27 18:09:11 -07002590 sizeof(struct dbri_dma),
2591 (void *)dbri->dma, dbri->dma_dvma);
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002592}
2593
Bill Pemberton32e02a72012-12-06 12:35:25 -05002594static int dbri_probe(struct platform_device *op)
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002595{
Takashi Iwai475675d2005-11-17 15:11:51 +01002596 struct snd_dbri *dbri;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002597 struct resource *rp;
Takashi Iwai475675d2005-11-17 15:11:51 +01002598 struct snd_card *card;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002599 static int dev = 0;
David S. Miller2bd320f2008-08-27 00:30:59 -07002600 int irq;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002601 int err;
2602
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002603 if (dev >= SNDRV_CARDS)
2604 return -ENODEV;
2605 if (!enable[dev]) {
2606 dev++;
2607 return -ENOENT;
2608 }
2609
Grant Likely1636f8a2010-06-18 11:09:58 -06002610 irq = op->archdata.irqs[0];
Krzysztof Heltafeacfd2007-09-05 15:05:08 +02002611 if (irq <= 0) {
2612 printk(KERN_ERR "DBRI-%d: No IRQ.\n", dev);
Martin Habets43388292005-09-10 15:39:00 +02002613 return -ENODEV;
2614 }
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002615
Takashi Iwaia2fefc32014-01-29 14:41:09 +01002616 err = snd_card_new(&op->dev, index[dev], id[dev], THIS_MODULE,
2617 sizeof(struct snd_dbri), &card);
Takashi Iwaibd7dd772008-12-28 16:45:02 +01002618 if (err < 0)
2619 return err;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002620
2621 strcpy(card->driver, "DBRI");
2622 strcpy(card->shortname, "Sun DBRI");
David S. Miller2bd320f2008-08-27 00:30:59 -07002623 rp = &op->resource[0];
Andrew Morton5863aa62006-07-03 00:24:22 -07002624 sprintf(card->longname, "%s at 0x%02lx:0x%016Lx, irq %d",
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002625 card->shortname,
Krzysztof Heltafeacfd2007-09-05 15:05:08 +02002626 rp->flags & 0xffL, (unsigned long long)rp->start, irq);
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002627
David S. Miller2bd320f2008-08-27 00:30:59 -07002628 err = snd_dbri_create(card, op, irq, dev);
Krzysztof Heltafeacfd2007-09-05 15:05:08 +02002629 if (err < 0) {
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002630 snd_card_free(card);
2631 return err;
2632 }
2633
Takashi Iwai475675d2005-11-17 15:11:51 +01002634 dbri = card->private_data;
Krzysztof Heltafeacfd2007-09-05 15:05:08 +02002635 err = snd_dbri_pcm(card);
Krzysztof Heltcf68d212007-09-04 13:09:20 +02002636 if (err < 0)
Takashi Iwai16dab542005-09-05 17:17:58 +02002637 goto _err;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002638
Krzysztof Heltafeacfd2007-09-05 15:05:08 +02002639 err = snd_dbri_mixer(card);
Krzysztof Heltcf68d212007-09-04 13:09:20 +02002640 if (err < 0)
Takashi Iwai16dab542005-09-05 17:17:58 +02002641 goto _err;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002642
2643 /* /proc file handling */
Krzysztof Heltafeacfd2007-09-05 15:05:08 +02002644 snd_dbri_proc(card);
David S. Miller2bd320f2008-08-27 00:30:59 -07002645 dev_set_drvdata(&op->dev, card);
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002646
Krzysztof Helt098ccbc2007-08-20 12:30:54 +02002647 err = snd_card_register(card);
2648 if (err < 0)
Takashi Iwai16dab542005-09-05 17:17:58 +02002649 goto _err;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002650
2651 printk(KERN_INFO "audio%d at %p (irq %d) is DBRI(%c)+CS4215(%d)\n",
2652 dev, dbri->regs,
Grant Likely61c7a082010-04-13 16:12:29 -07002653 dbri->irq, op->dev.of_node->name[9], dbri->mm.version);
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002654 dev++;
2655
2656 return 0;
Takashi Iwai16dab542005-09-05 17:17:58 +02002657
Krzysztof Helt098ccbc2007-08-20 12:30:54 +02002658_err:
Takashi Iwai16dab542005-09-05 17:17:58 +02002659 snd_dbri_free(dbri);
2660 snd_card_free(card);
2661 return err;
Takashi Iwai1bd9deb2005-06-30 18:26:20 +02002662}
2663
Bill Pemberton32e02a72012-12-06 12:35:25 -05002664static int dbri_remove(struct platform_device *op)
Krzysztof Heltafeacfd2007-09-05 15:05:08 +02002665{
David S. Miller2bd320f2008-08-27 00:30:59 -07002666 struct snd_card *card = dev_get_drvdata(&op->dev);
Krzysztof Heltafeacfd2007-09-05 15:05:08 +02002667
2668 snd_dbri_free(card->private_data);
2669 snd_card_free(card);
2670
Krzysztof Heltafeacfd2007-09-05 15:05:08 +02002671 return 0;
2672}
2673
David S. Millerfd098312008-08-31 01:23:17 -07002674static const struct of_device_id dbri_match[] = {
Krzysztof Heltafeacfd2007-09-05 15:05:08 +02002675 {
2676 .name = "SUNW,DBRIe",
2677 },
2678 {
2679 .name = "SUNW,DBRIf",
2680 },
2681 {},
2682};
2683
2684MODULE_DEVICE_TABLE(of, dbri_match);
2685
Grant Likelyf07eb222011-02-22 21:05:04 -07002686static struct platform_driver dbri_sbus_driver = {
Grant Likely40182942010-04-13 16:13:02 -07002687 .driver = {
2688 .name = "dbri",
Grant Likely40182942010-04-13 16:13:02 -07002689 .of_match_table = dbri_match,
2690 },
Krzysztof Heltafeacfd2007-09-05 15:05:08 +02002691 .probe = dbri_probe,
Bill Pemberton32e02a72012-12-06 12:35:25 -05002692 .remove = dbri_remove,
Krzysztof Heltafeacfd2007-09-05 15:05:08 +02002693};
2694
Axel Lina09452e2011-11-27 16:36:04 +08002695module_platform_driver(dbri_sbus_driver);