e200: Add recording. Just from MIC right now and FM integration will happen soon. Most every bit of weirdness is nescessary and no problems seem to exist that the retailos doesn't exhibit too (namely noise when LCD is on when recording from MIC).

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13557 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 155 insertions, 47 deletions

diff --git a/firmware/target/arm/pcm-pp.c b/firmware/target/arm/pcm-pp.c
index 41bd92bd0d..9027ff13b3 100644
--- a/firmware/target/arm/pcm-pp.c
+++ b/firmware/target/arm/pcm-pp.c
@@ -160,7 +160,7 @@ void fiq(void)
 {
     /* Clear interrupt */
 #if CONFIG_CPU == PP5020 || CONFIG_CPU == PP5024
-    IISCONFIG &= ~0x2;
+    IISCONFIG &= ~(1 << 1);
 #elif CONFIG_CPU == PP5002
     inl(0xcf001040);
     IISFIFO_CFG &= ~(1<<9);
@@ -171,7 +171,7 @@ void fiq(void)
             if (FIFO_FREE_COUNT < 2) {
                 /* Enable interrupt */
 #if CONFIG_CPU == PP5020 || CONFIG_CPU == PP5024
-                IISCONFIG |= 0x2;
+                IISCONFIG |= (1 << 1);
 #elif CONFIG_CPU == PP5002
                 IISFIFO_CFG |= (1<<9);
 #endif
@@ -221,7 +221,7 @@ void pcm_play_dma_start(const void *addr, size_t size)
 
     /* Enable playback FIFO */
 #if CONFIG_CPU == PP5020 || CONFIG_CPU == PP5024
-    IISCONFIG |= 0x20000000;
+    IISCONFIG |= (1 << 29);
 #elif CONFIG_CPU == PP5002
     IISCONFIG |= 0x4;
 #endif
@@ -232,7 +232,7 @@ void pcm_play_dma_start(const void *addr, size_t size)
         if (FIFO_FREE_COUNT < 2) {
             /* Enable interrupt */
 #if CONFIG_CPU == PP5020 || CONFIG_CPU == PP5024
-            IISCONFIG |= 0x2;
+            IISCONFIG |= (1 << 1);
 #elif CONFIG_CPU == PP5002
             IISFIFO_CFG |= (1<<9);
 #endif
@@ -257,13 +257,8 @@ void pcm_play_dma_stop(void)
     pcm_paused = false;
 
 #if CONFIG_CPU == PP5020 || CONFIG_CPU == PP5024
-
-    /* Disable playback FIFO */
-    IISCONFIG &= ~0x20000000;
-
-    /* Disable the interrupt */
-    IISCONFIG &= ~0x2;
-
+    /* Disable playback FIFO and interrupt */
+    IISCONFIG &= ~((1 << 29) | (1 << 1));
 #elif CONFIG_CPU == PP5002
 
     /* Disable playback FIFO */
@@ -279,10 +274,8 @@ void pcm_play_dma_stop(void)
 void pcm_play_pause_pause(void)
 {
 #if CONFIG_CPU == PP5020 || CONFIG_CPU == PP5024
-    /* Disable the interrupt */
-    IISCONFIG &= ~0x2;
-    /* Disable playback FIFO */
-    IISCONFIG &= ~0x20000000;
+    /* Disable playback FIFO and interrupt */
+    IISCONFIG &= ~((1 << 29) | (1 << 1));
 #elif CONFIG_CPU == PP5002
     /* Disable the interrupt */
     IISFIFO_CFG &= ~(1<<9);
@@ -301,7 +294,7 @@ void pcm_play_pause_unpause(void)
 
     /* Enable playback FIFO */
 #if CONFIG_CPU == PP5020 || CONFIG_CPU == PP5024
-    IISCONFIG |= 0x20000000;
+    IISCONFIG |= (1 << 29);
 #elif CONFIG_CPU == PP5002
     IISCONFIG |= 0x4;
 #endif
@@ -312,7 +305,7 @@ void pcm_play_pause_unpause(void)
         if (FIFO_FREE_COUNT < 2) {
             /* Enable interrupt */
 #if CONFIG_CPU == PP5020 || CONFIG_CPU == PP5024
-            IISCONFIG |= 0x2;
+            IISCONFIG |= (1 << 1);
 #elif CONFIG_CPU == PP5002
             IISFIFO_CFG |= (1<<9);
 #endif
@@ -369,6 +362,79 @@ void pcm_postinit(void)
  ** Recording DMA transfer
  **/
 #ifdef HAVE_RECORDING
+
+#ifdef HAVE_AS3514
+void fiq_record(void) ICODE_ATTR __attribute__((naked));
+void fiq_record(void)
+{
+    register pcm_more_callback_type2 more_ready;
+    register int32_t value1, value2;
+
+    asm volatile ("stmfd sp!, {r0-r7, ip, lr} \n");   /* Store context */
+
+    IISCONFIG &= ~(1 << 0);
+
+    if (audio_channels == 2) {
+        /* RX is stereo */
+        while (p_size > 0) {
+            if (FIFO_FREE_COUNT < 2) {
+                /* enable interrupt */
+                IISCONFIG |= (1 << 0);
+                goto fiq_record_exit;
+            }
+
+            /* Discard every other sample since ADC clock is 1/2 LRCK */
+            value1 = IISFIFO_RD;
+            value2 = IISFIFO_RD;
+
+            *(int32_t *)p = value1;
+            p += 2;
+            p_size -= 4;
+
+            /* TODO: Figure out how to do IIS loopback */
+            if (audio_output_source != AUDIO_SRC_PLAYBACK) {
+                IISFIFO_WR = value1;
+                IISFIFO_WR = value1;
+            }
+        }
+    }
+    else {
+        /* RX is left channel mono */
+        while (p_size > 0) {
+            if (FIFO_FREE_COUNT < 2) {
+                /* enable interrupt */
+                IISCONFIG |= (1 << 0);
+                goto fiq_record_exit;
+            }
+
+            /* Discard every other sample since ADC clock is 1/2 LRCK */
+            value1 = IISFIFO_RD;
+            value2 = IISFIFO_RD;
+            *p++ = value1;
+            *p++ = value1;
+            p_size -= 4;
+
+            if (audio_output_source != AUDIO_SRC_PLAYBACK) {
+                value1 = *((int32_t *)p - 1);
+                IISFIFO_WR = value1;
+                IISFIFO_WR = value1;
+            }
+        }
+    }
+
+    more_ready = pcm_callback_more_ready;
+
+    if (more_ready == NULL || more_ready(0) < 0) {
+        /* Finished recording */
+        pcm_rec_dma_stop();
+    }
+
+fiq_record_exit:
+    asm volatile("ldmfd sp!, {r0-r7, ip, lr} \n"   /* Restore context */
+                 "subs  pc, lr, #4           \n"); /* Return from FIQ */
+}
+
+#else
 static short peak_l, peak_r IBSS_ATTR;
 
 void fiq_record(void) ICODE_ATTR __attribute__ ((interrupt ("FIQ")));
@@ -380,7 +446,7 @@ void fiq_record(void)
 
     /* Clear interrupt */
 #if CONFIG_CPU == PP5020 || CONFIG_CPU == PP5024
-    IISCONFIG &= ~0x01;
+    IISCONFIG &= ~(1 << 0);
 #elif CONFIG_CPU == PP5002
     /* TODO */
 #endif
@@ -389,12 +455,13 @@ void fiq_record(void)
         if (FIFO_FREE_COUNT < 2) {
             /* enable interrupt */
 #if CONFIG_CPU == PP5020 || CONFIG_CPU == PP5024
-            IISCONFIG |= 0x01;
+            IISCONFIG |= (1 << 0);
 #elif CONFIG_CPU == PP5002
             /* TODO */
 #endif
             return;
         }
+
         value = (unsigned short)(IISFIFO_RD >> 16);
         if (value > peak_l) peak_l = value;
         else if (-value > peak_l) peak_l = -value;
@@ -424,16 +491,18 @@ void fiq_record(void)
     pcm_rec_dma_stop();
 }
 
+#endif /* HAVE_AS3514 */
+
 /* Continue transferring data in */
 void pcm_record_more(void *start, size_t size)
 {
-    rec_peak_addr = (unsigned long *)start; /* Start peaking at dest */
-    p             = start;
-    p_size        = size;    /* Bytes to transfer   */
+    rec_peak_addr = start; /* Start peaking at dest */
+    p             = start; /* Start of RX buffer    */
+    p_size        = size;  /* Bytes to transfer     */
 #if CONFIG_CPU == PP5020 || CONFIG_CPU == PP5024
-            IISCONFIG |= 0x01;
+    IISCONFIG |= (1 << 0);
 #elif CONFIG_CPU == PP5002
-            /* TODO */
+    /* TODO */
 #endif
 }
 
@@ -441,11 +510,14 @@ void pcm_rec_dma_stop(void)
 {
     logf("pcm_rec_dma_stop");
 
-    /* disable fifo */
-    IISCONFIG &= ~0x10000000;
-
     disable_fiq();
 
+    /* clear interrupt, disable fifo */
+    IISCONFIG &= ~((1 << 28) | (1 << 0));
+
+    /* clear rx fifo */
+    IISFIFO_CFG |= (1 << 12);
+
     pcm_recording = false;
 }
 
@@ -455,7 +527,10 @@ void pcm_rec_dma_start(void *addr, size_t size)
 
     pcm_recording = true;
 
+#ifndef HAVE_AS3514
     peak_l = peak_r = 0;
+#endif
+
     p_size = size;
     p = addr;
 
@@ -463,11 +538,8 @@ void pcm_rec_dma_start(void *addr, size_t size)
     CPU_INT_PRIORITY |= I2S_MASK;
     CPU_INT_EN = I2S_MASK;
 
-    /* interrupt on full fifo */
-    IISCONFIG |= 0x1;
-
-    /* enable record fifo */
-    IISCONFIG |= 0x10000000;
+    /* interrupt on full fifo, enable record fifo */
+    IISCONFIG |= (1 << 28) | (1 << 0);
 
     set_fiq_handler(fiq_record);
     enable_fiq();
@@ -476,18 +548,7 @@ void pcm_rec_dma_start(void *addr, size_t size)
 void pcm_close_recording(void)
 {
     logf("pcm_close_recording");
-
     pcm_rec_dma_stop();
-
-#if (CONFIG_CPU == PP5020 || CONFIG_CPU == PP5024)
-    disable_fiq();
-
-    /* disable fifo */
-    IISCONFIG &= ~0x10000000;
-
-    /* Clear interrupt */
-    IISCONFIG &= ~0x01;
-#endif
 } /* pcm_close_recording */
 
 void pcm_init_recording(void)
@@ -505,7 +566,7 @@ void pcm_init_recording(void)
     GPIOA_OUTPUT_VAL &= ~0x4;
 #endif
     /* Setup the recording FIQ handler */
-    *((unsigned int*)(15*4)) = (unsigned int)&fiq_record;
+    set_fiq_handler(fiq_record);
 #endif
 
     pcm_rec_dma_stop();
@@ -513,10 +574,57 @@ void pcm_init_recording(void)
 
 void pcm_calculate_rec_peaks(int *left, int *right)
 {
-    *left = rec_peak_left;
-    *right = rec_peak_right;
+#ifdef HAVE_AS3514
+    if (pcm_recording)
+    {
+        unsigned long *start = rec_peak_addr;
+        unsigned long *end = (unsigned long *)p;
+
+        if (start < end)
+        {
+            unsigned long *addr = start;
+            long peak_l   = 0, peak_r   = 0;
+            long peaksq_l = 0, peaksq_r = 0;
+
+            do
+            {
+                long value = *addr;
+                long ch, chsq;
+
+                ch = (int16_t)value;
+                chsq = ch*ch;
+                if (chsq > peaksq_l)
+                    peak_l = ch, peaksq_l = chsq;
+
+                ch = value >> 16;
+                chsq = ch*ch;
+                if (chsq > peaksq_r)
+                    peak_r = ch, peaksq_r = chsq;
+
+                addr += 4;
+            }
+            while (addr < end);
+
+            if (start == rec_peak_addr)
+                rec_peak_addr = end;
+
+            rec_peak_left  = abs(peak_l);
+            rec_peak_right = abs(peak_r);
+        }
+    }
+    else
+    {
+        rec_peak_left = rec_peak_right = 0;
+    }
+#endif /* HAVE_AS3514 */
+
+    if (left)
+        *left = rec_peak_left;
+
+    if (right)
+        *right = rec_peak_right;
 }
-#endif
+#endif /* HAVE_RECORDING */
 
 /*
  * This function goes directly into the DMA buffer to calculate the left and