1 /***************************************************************************
3 * Open \______ \ ____ ____ | | _\_ |__ _______ ___
4 * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
5 * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
6 * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
10 * Copyright (C) 2006 by Michael Sevakis
11 * Copyright (C) 2008 by Rob Purchase
13 * This program is free software; you can redistribute it and/or
14 * modify it under the terms of the GNU General Public License
15 * as published by the Free Software Foundation; either version 2
16 * of the License, or (at your option) any later version.
18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
19 * KIND, either express or implied.
21 ****************************************************************************/
32 /* NOTE: The order of size and p is important if you use assembler
33 optimised fiq handler, so don't change it. */
43 /****************************************************************************
44 ** Playback DMA transfer
46 struct dma_data dma_play_data SHAREDBSS_ATTR
=
48 /* Initialize to a locked, stopped state */
58 void pcm_postinit(void)
63 const void * pcm_play_dma_get_peak_buffer(int *count
)
65 unsigned long addr
= (unsigned long)dma_play_data
.p
;
66 size_t cnt
= dma_play_data
.size
;
68 return (void *)((addr
+ 2) & ~3);
71 void pcm_play_dma_init(void)
73 DAVC
= 0x0; /* Digital Volume = max */
75 /* Set DAI clock divided from PLL0 (192MHz).
76 The best approximation of 256*44.1kHz is 11.291MHz. */
78 PCLK_DAI
= (1<<28) | 61682; /* DCO mode */
81 /* Enable DAI block in Master mode, 256fs->32fs, 16bit LSB */
83 #elif defined(IAUDIO_7)
85 PCLK_DAI
= (0x800a << 16) | (PCLK_DAI
& 0xffff);
88 /* Master mode, 256->64fs, 16bit LSB*/
90 #elif defined(LOGIK_DAX)
92 #elif defined(SANSA_M200)
94 #elif defined(SANSA_C100)
97 #error "Target isn't supported"
99 /* Set DAI interrupts as FIQs */
100 IRQSEL
= ~(DAI_RX_IRQ_MASK
| DAI_TX_IRQ_MASK
);
102 /* Initialize default register values. */
105 dma_play_data
.size
= 0;
107 dma_play_data
.core
= 0; /* no core in control */
111 void pcm_dma_apply_settings(void)
115 static void play_start_pcm(void)
117 DAMR
&= ~(1<<14); /* disable tx */
118 dma_play_data
.state
= 1;
120 if (dma_play_data
.size
>= 16)
122 DADO_L(0) = *dma_play_data
.p
++;
123 DADO_R(0) = *dma_play_data
.p
++;
124 DADO_L(1) = *dma_play_data
.p
++;
125 DADO_R(1) = *dma_play_data
.p
++;
126 DADO_L(2) = *dma_play_data
.p
++;
127 DADO_R(2) = *dma_play_data
.p
++;
128 DADO_L(3) = *dma_play_data
.p
++;
129 DADO_R(3) = *dma_play_data
.p
++;
130 dma_play_data
.size
-= 16;
133 DAMR
|= (1<<14); /* enable tx */
136 static void play_stop_pcm(void)
138 DAMR
&= ~(1<<14); /* disable tx */
139 dma_play_data
.state
= 0;
142 void pcm_play_dma_start(const void *addr
, size_t size
)
144 dma_play_data
.p
= (void *)(((uintptr_t)addr
+ 2) & ~3);
145 dma_play_data
.size
= (size
& ~3);
148 /* This will become more important later - and different ! */
149 dma_play_data
.core
= processor_id(); /* save initiating core */
152 IEN
|= DAI_TX_IRQ_MASK
;
157 void pcm_play_dma_stop(void)
160 dma_play_data
.size
= 0;
162 dma_play_data
.core
= 0; /* no core in control */
166 void pcm_play_lock(void)
168 int status
= disable_fiq_save();
170 if (++dma_play_data
.locked
== 1)
172 IEN
&= ~DAI_TX_IRQ_MASK
;
178 void pcm_play_unlock(void)
180 int status
= disable_fiq_save();
182 if (--dma_play_data
.locked
== 0 && dma_play_data
.state
!= 0)
184 IEN
|= DAI_TX_IRQ_MASK
;
190 void pcm_play_dma_pause(bool pause
)
199 size_t pcm_get_bytes_waiting(void)
201 return dma_play_data
.size
& ~3;
204 #ifdef HAVE_RECORDING
205 /* TODO: implement */
206 void pcm_rec_dma_init(void)
210 void pcm_rec_dma_close(void)
214 void pcm_rec_dma_start(void *addr
, size_t size
)
220 void pcm_rec_dma_stop(void)
224 void pcm_rec_lock(void)
228 void pcm_rec_unlock(void)
232 const void * pcm_rec_dma_get_peak_buffer(int *count
)
238 void pcm_record_more(void *start
, size_t size
)
245 #if defined(CPU_TCC77X) || defined(CPU_TCC780X)
246 void fiq_handler(void) ICODE_ATTR
__attribute__((naked
));
247 void fiq_handler(void)
249 /* r10 contains DADO_L0 base address (set in crt0.S to minimise code in the
250 * FIQ handler. r11 contains address of p (also set in crt0.S). Most other
251 * addresses we need are generated by using offsets with these two.
252 * r8 and r9 contains local copies of p and size respectively.
253 * r0-r3 and r12 is a working register.
256 #if defined(CPU_TCC780X)
257 "mov r8, #0xc000 \n" /* DAI_TX_IRQ_MASK | DAI_RX_IRQ_MASK */
258 "ldr r9, =0xf3001004 \n" /* CREQ */
259 #elif defined(CPU_TCC77X)
260 "mov r8, #0x0030 \n" /* DAI_TX_IRQ_MASK | DAI_RX_IRQ_MASK */
261 "ldr r9, =0x80000104 \n" /* CREQ */
263 "str r8, [r9] \n" /* clear DAI IRQs */
264 "ldmia r11, { r8-r9 } \n" /* r8 = p, r9 = size */
265 "cmp r9, #0x10 \n" /* is size <16? */
266 "blt .more_data \n" /* if so, ask pcmbuf for more data */
269 "ldr r12, [r8], #4 \n" /* load two samples */
270 "str r12, [r10, #0x0] \n" /* write top sample to DADO_L0 */
271 "mov r12, r12, lsr #16 \n" /* put right sample at the bottom */
272 "str r12, [r10, #0x4] \n" /* write low sample to DADO_R0*/
273 "ldr r12, [r8], #4 \n" /* load two samples */
274 "str r12, [r10, #0x8] \n" /* write top sample to DADO_L1 */
275 "mov r12, r12, lsr #16 \n" /* put right sample at the bottom */
276 "str r12, [r10, #0xc] \n" /* write low sample to DADO_R1*/
277 "ldr r12, [r8], #4 \n" /* load two samples */
278 "str r12, [r10, #0x10] \n" /* write top sample to DADO_L2 */
279 "mov r12, r12, lsr #16 \n" /* put right sample at the bottom */
280 "str r12, [r10, #0x14] \n" /* write low sample to DADO_R2*/
281 "ldr r12, [r8], #4 \n" /* load two samples */
282 "str r12, [r10, #0x18] \n" /* write top sample to DADO_L3 */
283 "mov r12, r12, lsr #16 \n" /* put right sample at the bottom */
284 "str r12, [r10, #0x1c] \n" /* write low sample to DADO_R3*/
285 "sub r9, r9, #0x10 \n" /* 4 words written */
286 "stmia r11, { r8-r9 } \n" /* save p and size */
289 "subs pc, lr, #4 \n" /* FIQ specific return sequence */
292 "stmfd sp!, { r0-r3, lr } \n" /* stack scratch regs and lr */
293 "ldr r2, =pcm_callback_for_more \n"
294 "ldr r2, [r2] \n" /* get callback address */
295 "cmp r2, #0 \n" /* check for null pointer */
296 "movne r0, r11 \n" /* r0 = &p */
297 "addne r1, r11, #4 \n" /* r1 = &size */
298 "blxne r2 \n" /* call pcm_callback_for_more */
299 "ldmia r11, { r8-r9 } \n" /* reload p and size */
300 "cmp r9, #0x10 \n" /* did we actually get more data? */
301 "ldmgefd sp!, { r0-r3, lr } \n"
302 "bge .fill_fifo \n" /* yes: fill the fifo */
303 "ldr r12, =pcm_play_dma_stop \n"
304 "blx r12 \n" /* no: stop playback */
305 "ldr r12, =pcm_play_dma_stopped_callback \n"
307 "ldmfd sp!, { r0-r3, lr } \n"
312 #else /* C version for reference */
313 void fiq_handler(void) ICODE_ATTR
__attribute__((naked
));
314 void fiq_handler(void)
316 asm volatile( "stmfd sp!, {r0-r7, ip, lr} \n" /* Store context */
317 "sub sp, sp, #8 \n"); /* Reserve stack */
319 register pcm_more_callback_type get_more
;
321 if (dma_play_data
.size
< 16)
323 /* p is empty, get some more data */
324 get_more
= pcm_callback_for_more
;
327 get_more((unsigned char**)&dma_play_data
.p
,
328 &dma_play_data
.size
);
332 if (dma_play_data
.size
>= 16)
334 DADO_L(0) = *dma_play_data
.p
++;
335 DADO_R(0) = *dma_play_data
.p
++;
336 DADO_L(1) = *dma_play_data
.p
++;
337 DADO_R(1) = *dma_play_data
.p
++;
338 DADO_L(2) = *dma_play_data
.p
++;
339 DADO_R(2) = *dma_play_data
.p
++;
340 DADO_L(3) = *dma_play_data
.p
++;
341 DADO_R(3) = *dma_play_data
.p
++;
343 dma_play_data
.size
-= 16;
347 /* No more data, so disable the FIFO/interrupt */
349 pcm_play_dma_stopped_callback();
352 /* Clear FIQ status */
353 CREQ
= DAI_TX_IRQ_MASK
| DAI_RX_IRQ_MASK
;
355 asm volatile( "add sp, sp, #8 \n" /* Cleanup stack */
356 "ldmfd sp!, {r0-r7, ip, lr} \n" /* Restore context */
357 "subs pc, lr, #4 \n"); /* Return from FIQ */
361 /* TODO: required by wm8731 codec */