arch/ppc-chrp/efika/ata/ata_bestcomm.c

   1 /*
   2     Copyright © 2009-2014, The AROS Development Team. All rights reserved.
   3     $Id$
   4 */
   5
   6 #define DEBUG 1
   7
   8 #include <aros/debug.h>
   9 #include <asm/mpc5200b.h>
  10 #include <inttypes.h>
  11
  12
  13
  14 #define MAX_DMA_BUFFERS         4
  15 #define MAX_DMA_TRANSFER        256*512
  16
  17 /* Buffer descriptor */
  18 typedef struct {
  19         uint32_t        status;
  20         void            *data1;
  21         void            *data2;
  22 } ata_bd2_t;
  23
  24 #define SDMA_FLAGS_NONE         0x0000
  25 #define SDMA_FLAGS_ENABLE       0x0001
  26 #define SDMA_FLAGS_BD2          0x0002
  27 #define SDMA_BD_READY           0x40000000UL
  28
  29 typedef struct {
  30         uint32_t        enable;
  31         uint32_t        bd_base;
  32         uint32_t        bd_last;
  33         uint32_t        bd_start;
  34         uint32_t        buffer_size;
  35 } ata_ivar_t;
  36
  37 typedef struct {
  38         int16_t pad0;
  39         int16_t incr_bytes;
  40         int16_t pad1;
  41         int16_t incr_dst;
  42         int16_t pad2;
  43         int16_t incr_src;
  44 } ata_inc_t;
  45
  46 uint8_t *sram = NULL;
  47 volatile bestcomm_t *bestcomm = NULL;
  48 volatile bestcomm_tdt_t *tdt = NULL;
  49 uint32_t bestcomm_taskid = 0xffffffff;
  50 volatile uint32_t *bestcomm_taskcode;
  51 volatile uint32_t *bestcomm_vartable;
  52 volatile ata_bd2_t *bd2;
  53 uint16_t idx, odx, num_bd;
  54 uint32_t flags;
  55
  56 volatile ata_ivar_t *ivar;
  57 volatile ata_inc_t      *inc;
  58
  59 void bestcomm_init()
  60 {
  61         D(bug("[ATA] bestcomm_init()\n"));
  62
  63         tdt = (bestcomm_tdt_t *)bestcomm->bc_taskBar;
  64
  65         D(bug("[ATA] taskBar at %08x\n", tdt));
  66
  67         bestcomm_taskcode = (tdt[bestcomm_taskid].start);
  68         bestcomm_vartable = (tdt[bestcomm_taskid].var);
  69
  70         ivar = (ata_ivar_t *)bestcomm_vartable;
  71         inc = (ata_inc_t *)(bestcomm_vartable + 24);
  72
  73         D(bug("[ATA] looking on ivar at %08x:\n", ivar));
  74         D(bug("[ATA]   enable=%08x bd_base=%08x bd_last=%08x bd_start=%08x buffer_size=%08x\n",
  75                         ivar->enable, ivar->bd_base, ivar->bd_last, ivar->bd_start, ivar->buffer_size));
  76 }