From 4d04132c76700b30708bf99fc0ef664e8bb0b58d Mon Sep 17 00:00:00 2001
From: Michael Sevakis <jethead71@rockbox.org>
Date: Wed, 12 May 2010 14:05:36 +0000
Subject: PCM bottom layer simplification. pcm_rec_peak_addr variable no longer
 has to be handled there. Driver can just return current pointer for recording
 peaks. A new define, HAVE_PCM_REC_DMA_ADDRESS, specifies that physical
 addresses are being used for recording and translation is needed before
 starting a new block. The drivers need not worry about aligning start and
 size nor should care if either will be zero. All this will be checked in the
 logical layer first.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@25970 a1c6a512-1295-4272-9138-f99709370657
---
 firmware/target/arm/as3525/pcm-as3525.c            | 13 +++--------
 .../target/arm/imx31/gigabeat-s/pcm-gigabeat-s.c   | 27 ++++------------------
 firmware/target/arm/pcm-pp.c                       | 22 +++---------------
 firmware/target/arm/pcm-telechips.c                |  7 +++---
 firmware/target/arm/s5l8700/pcm-s5l8700.c          |  6 ++---
 5 files changed, 17 insertions(+), 58 deletions(-)

(limited to 'firmware/target/arm')

diff --git a/firmware/target/arm/as3525/pcm-as3525.c b/firmware/target/arm/as3525/pcm-as3525.c
index 53a3f0c9a3..4d78899398 100644
--- a/firmware/target/arm/as3525/pcm-as3525.c
+++ b/firmware/target/arm/as3525/pcm-as3525.c
@@ -202,7 +202,7 @@ void pcm_rec_unlock(void)
 }
 
 
-void pcm_record_more(void *start, size_t size)
+void pcm_rec_dma_record_more(void *start, size_t size)
 {
     rec_start_addr = start;
     rec_size = size;
@@ -331,16 +331,9 @@ void pcm_rec_dma_init(void)
 }
 
 
-const void * pcm_rec_dma_get_peak_buffer(int *count)
+const void * pcm_rec_dma_get_peak_buffer(void)
 {
-    const void *peak_buffer;
-
-    pcm_rec_lock();
-    *count = rec_size >> 2;
-    peak_buffer = (const void*)rec_start_addr;
-    pcm_rec_unlock();
-
-    return peak_buffer;
+    return (const void*)rec_start_addr;
 }
 
 #endif /* HAVE_RECORDING */
diff --git a/firmware/target/arm/imx31/gigabeat-s/pcm-gigabeat-s.c b/firmware/target/arm/imx31/gigabeat-s/pcm-gigabeat-s.c
index c0651caf51..02051fad90 100644
--- a/firmware/target/arm/imx31/gigabeat-s/pcm-gigabeat-s.c
+++ b/firmware/target/arm/imx31/gigabeat-s/pcm-gigabeat-s.c
@@ -432,17 +432,13 @@ void pcm_rec_unlock(void)
     }
 }
 
-void pcm_record_more(void *start, size_t size)
+void pcm_rec_dma_record_more(void *start, size_t size)
 {
-    start = (void *)(((unsigned long)start + 3) & ~3);
-    size &= ~3;
-
     /* Invalidate - buffer must be coherent */
     dump_dcache_range(start, size);
 
     start = (void *)addr_virt_to_phys((unsigned long)start);
 
-    pcm_rec_peak_addr = start;
     dma_rec_bd.buf_addr = start;
     dma_rec_bd.mode.count = size;
     dma_rec_bd.mode.command = TRANSFER_16BIT;
@@ -469,12 +465,6 @@ void pcm_rec_dma_start(void *addr, size_t size)
 {
     pcm_rec_dma_stop();
 
-    addr = (void *)(((unsigned long)addr + 3) & ~3);
-    size &= ~3;
-
-    if (size <= 0)
-        return;
-
     if (!sdma_channel_reset(DMA_REC_CH_NUM))
         return;
     
@@ -482,7 +472,6 @@ void pcm_rec_dma_start(void *addr, size_t size)
     dump_dcache_range(addr, size);
 
     addr = (void *)addr_virt_to_phys((unsigned long)addr);
-    pcm_rec_peak_addr = addr;
     dma_rec_bd.buf_addr = addr;
     dma_rec_bd.mode.count = size;
     dma_rec_bd.mode.command = TRANSFER_16BIT;
@@ -524,10 +513,10 @@ void pcm_rec_dma_init(void)
     sdma_channel_set_priority(DMA_REC_CH_NUM, DMA_REC_CH_PRIORITY);
 }
 
-const void * pcm_rec_dma_get_peak_buffer(int *count)
+const void * pcm_rec_dma_get_peak_buffer(void)
 {
     static unsigned long pda NOCACHEBSS_ATTR;
-    unsigned long buf, addr, end, bufend;
+    unsigned long buf, end, bufend;
     int oldstatus;
 
     /* read burst dma destination address register in channel context */
@@ -536,19 +525,13 @@ const void * pcm_rec_dma_get_peak_buffer(int *count)
     oldstatus = disable_irq_save();
     end = pda;
     buf = (unsigned long)dma_rec_bd.buf_addr;
-    addr = (unsigned long)pcm_rec_peak_addr;
     bufend = buf + dma_rec_bd.mode.count;
     restore_irq(oldstatus);
 
     /* Be addresses are coherent (no buffer change during read) */
-    if (addr >= buf && addr < bufend &&
-        end >= buf && end < bufend)
-    {
-        *count = (end >> 2) - (addr >> 2);
-        return (void *)(addr & ~3);
-    }
+    if (end >= buf && end < bufend)
+        return (void *)(end & ~3);
 
-    *count = 0;
     return NULL;
 }
 
diff --git a/firmware/target/arm/pcm-pp.c b/firmware/target/arm/pcm-pp.c
index bd12b13032..bad3f593fe 100644
--- a/firmware/target/arm/pcm-pp.c
+++ b/firmware/target/arm/pcm-pp.c
@@ -431,9 +431,6 @@ static void play_stop_pcm(void)
 
 void pcm_play_dma_start(const void *addr, size_t size)
 {
-    addr = (void *)(((long)addr + 2) & ~3);
-    size &= ~3;
-
 #if NUM_CORES > 1
     /* This will become more important later - and different ! */
     dma_play_data.core = processor_id(); /* save initiating core */
@@ -441,9 +438,6 @@ void pcm_play_dma_start(const void *addr, size_t size)
 
     pcm_play_dma_stop();
 
-    if (size == 0)
-        return;
-
 #ifdef CPU_PP502x
     if ((unsigned long)addr < UNCACHED_BASE_ADDR) {
         /* Flush any pending cache writes */
@@ -691,9 +685,8 @@ void fiq_record(void)
 #endif /* SANSA_E200 */
 
 /* Continue transferring data in */
-void pcm_record_more(void *start, size_t size)
+void pcm_rec_dma_record_more(void *start, size_t size)
 {
-    pcm_rec_peak_addr = start; /* Start peaking at dest */
     dma_rec_data.addr = (unsigned long)start; /* Start of RX buffer */
     dma_rec_data.size = size; /* Bytes to transfer */
 }
@@ -718,7 +711,6 @@ void pcm_rec_dma_start(void *addr, size_t size)
 {
     pcm_rec_dma_stop();
 
-    pcm_rec_peak_addr = addr;
     dma_rec_data.addr = (unsigned long)addr;
     dma_rec_data.size = size;
 #if NUM_CORES > 1
@@ -749,17 +741,9 @@ void pcm_rec_dma_init(void)
     pcm_rec_dma_stop();
 } /* pcm_init */
 
-const void * pcm_rec_dma_get_peak_buffer(int *count)
+const void * pcm_rec_dma_get_peak_buffer(void)
 {
-    unsigned long addr, end;
-
-    int status = disable_fiq_save();
-    addr = (unsigned long)pcm_rec_peak_addr;
-    end = dma_rec_data.addr;
-    restore_fiq(status);
-
-    *count = (end >> 2) - (addr >> 2);
-    return (void *)(addr & ~3);
+    return (void *)((unsigned long)dma_rec_data.addr & ~3);
 } /* pcm_rec_dma_get_peak_buffer */
 
 #endif /* HAVE_RECORDING */
diff --git a/firmware/target/arm/pcm-telechips.c b/firmware/target/arm/pcm-telechips.c
index f0ef667d4f..9d14fa5ed5 100644
--- a/firmware/target/arm/pcm-telechips.c
+++ b/firmware/target/arm/pcm-telechips.c
@@ -141,8 +141,8 @@ static void play_stop_pcm(void)
 
 void pcm_play_dma_start(const void *addr, size_t size)
 {
-    dma_play_data.p    = (void *)(((uintptr_t)addr + 2) & ~3);
-    dma_play_data.size = (size & ~3);
+    dma_play_data.p    = addr;
+    dma_play_data.size = size;
 
 #if NUM_CORES > 1
     /* This will become more important later - and different ! */
@@ -229,9 +229,8 @@ void pcm_rec_unlock(void)
 {
 }
 
-const void * pcm_rec_dma_get_peak_buffer(int *count)
+const void * pcm_rec_dma_get_peak_buffer(void)
 {
-    *count = 0;
     return NULL;
 }
 
diff --git a/firmware/target/arm/s5l8700/pcm-s5l8700.c b/firmware/target/arm/s5l8700/pcm-s5l8700.c
index 1edb05fd15..7798f41d11 100644
--- a/firmware/target/arm/s5l8700/pcm-s5l8700.c
+++ b/firmware/target/arm/s5l8700/pcm-s5l8700.c
@@ -367,7 +367,7 @@ void pcm_rec_unlock(void)
 {
 }
 
-void pcm_record_more(void *start, size_t size)
+void pcm_rec_dma_record_more(void *start, size_t size)
 {
     (void)start;
     (void)size;
@@ -393,9 +393,9 @@ void pcm_rec_dma_init(void)
 }
 
 
-const void * pcm_rec_dma_get_peak_buffer(int *count)
+const void * pcm_rec_dma_get_peak_buffer(void)
 {
-    (void)count;
+    return NULL;
 }
 
 #endif /* HAVE_RECORDING */
-- 
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