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[PATCH] HAL2: fix LE stream playback

To: linux-mips@linux-mips.org
Subject: [PATCH] HAL2: fix LE stream playback
From: Ladislav Michl <ladis@psi.cz>
Date: Fri, 10 Jan 2003 21:43:13 +0100
Cc: Ralf Baechle <ralf@linux-mips.org>, Ulf Karlsson <md1ulfc@mdstud.chalmers.se>
Original-recipient: rfc822;linux-mips@linux-mips.org
Sender: linux-mips-bounce@linux-mips.org
User-agent: Mutt/1.3.28i
Hi,

several people complained about it on IRC, so here is a patch against
linux_2_4 branch. Please apply.

Side note: recording still doesn't work. while ago i tried to play with
PBUS configuration and found following (refer to hpc3.ps):
1) writing 0x08248844 (ie. 16bit DMA stream) into pbus_dmacfgs produces
   noise at output.
2) writing 0x082c8844 (ie. 16bit with EVEN_HIGH bit set) make playback
   two times faster.
3) writing 0x08248844 (ie. 8 bit stream) works as expected. That is
   strange, because I still believe that HAL2 is 16bit device. I'd guess
   that there are two bugs in driver which neutralizes each other.
In all cases DMA stream wasn't started for recording.


--- XXX/drivers/sound/hal2.c    Mon Aug  5 19:40:50 2002
+++ linux/drivers/sound/hal2.c  Fri Jan 10 21:06:27 2003
@@ -1,6 +1,6 @@
 /*
  *  Driver for HAL2 sound processors
- *  Copyright (c) 2001, 2002 Ladislav Michl <ladis@psi.cz>
+ *  Copyright (c) 2001-2003 Ladislav Michl <ladis@linux-mips.org>
  *  
  *  Based on Ulf Carlsson's code.
  *
@@ -394,7 +394,8 @@
        fifobeg = 0;                            /* playback is first */
        fifoend = (sample_size * 4) >> 3;       /* doublewords */
        pbus->ctrl = HPC3_PDMACTRL_RT | HPC3_PDMACTRL_LD |
-                    (highwater << 8) | (fifobeg << 16) | (fifoend << 24);
+                    (highwater << 8) | (fifobeg << 16) | (fifoend << 24) |
+                    (hal2->dac.format & AFMT_S16_LE ? HPC3_PDMACTRL_SEL : 0);
        /* We disable everything before we do anything at all */
        pbus->pbus->pbdma_ctrl = HPC3_PDMACTRL_LD;
        hal2_i_clearbit16(hal2, H2I_DMA_PORT_EN, H2I_DMA_PORT_EN_CODECTX);
@@ -420,7 +421,8 @@
        fifobeg = (4 * 4) >> 3;                         /* record is second */
        fifoend = (4 * 4 + sample_size * 4) >> 3;       /* doublewords */
        pbus->ctrl = HPC3_PDMACTRL_RT | HPC3_PDMACTRL_RCV | HPC3_PDMACTRL_LD | 
-                    (highwater << 8) | (fifobeg << 16) | (fifoend << 24);
+                    (highwater << 8) | (fifobeg << 16) | (fifoend << 24) |
+                    (hal2->adc.format & AFMT_S16_LE ? HPC3_PDMACTRL_SEL : 0);
        pbus->pbus->pbdma_ctrl = HPC3_PDMACTRL_LD;
        hal2_i_clearbit16(hal2, H2I_DMA_PORT_EN, H2I_DMA_PORT_EN_CODECR);
        hal2_i_clearbit16(hal2, H2I_DMA_DRV, (1 << pbus->pbusnr));


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