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/* The dpalloc function used and implemented in this file was derieved
* from PPCBoot/U-Boot file "arch/powerpc/cpu/mpc8260/commproc.c".
*/
/* Author: Arun Dharankar <ADharankar@ATTBI.Com>
* This example is meant to only demonstrate how the IDMA could be used.
*/
/*
* This file is based on "arch/powerpc/8260_io/commproc.c" - here is it's
* copyright notice:
*
* General Purpose functions for the global management of the
* 8260 Communication Processor Module.
* Copyright (c) 1999 Dan Malek (dmalek@jlc.net)
* Copyright (c) 2000 MontaVista Software, Inc (source@mvista.com)
* 2.3.99 Updates
*
* In addition to the individual control of the communication
* channels, there are a few functions that globally affect the
* communication processor.
*
* Buffer descriptors must be allocated from the dual ported memory
* space. The allocator for that is here. When the communication
* process is reset, we reclaim the memory available. There is
* currently no deallocator for this memory.
*/
#include <common.h>
#include <console.h>
#include <exports.h>
DECLARE_GLOBAL_DATA_PTR;
#define STANDALONE
#ifndef STANDALONE /* Linked into/Part of PPCBoot */
#include <command.h>
#include <watchdog.h>
#else /* Standalone app of PPCBoot */
#define WATCHDOG_RESET() { \
*(ushort *)(CONFIG_SYS_IMMR + 0x1000E) = 0x556c; \
*(ushort *)(CONFIG_SYS_IMMR + 0x1000E) = 0xaa39; \
}
#endif /* STANDALONE */
static int debug = 1;
#define DEBUG(fmt, args...) { \
if(debug != 0) { \
printf("[%s %d %s]: ",__FILE__,__LINE__,__FUNCTION__); \
printf(fmt, ##args); \
} \
}
#define CPM_CR_IDMA1_SBLOCK (0x14)
#define CPM_CR_IDMA2_SBLOCK (0x15)
#define CPM_CR_IDMA3_SBLOCK (0x16)
#define CPM_CR_IDMA4_SBLOCK (0x17)
#define CPM_CR_IDMA1_PAGE (0x07)
#define CPM_CR_IDMA2_PAGE (0x08)
#define CPM_CR_IDMA3_PAGE (0x09)
#define CPM_CR_IDMA4_PAGE (0x0a)
#define PROFF_IDMA1_BASE ((uint)0x87fe)
#define PROFF_IDMA2_BASE ((uint)0x88fe)
#define PROFF_IDMA3_BASE ((uint)0x89fe)
#define PROFF_IDMA4_BASE ((uint)0x8afe)
#define CPM_CR_INIT_TRX ((ushort)0x0000)
#define CPM_CR_FLG ((ushort)0x0001)
#define mk_cr_cmd(PG, SBC, MCN, OP) \
((PG << 26) | (SBC << 21) | (MCN << 6) | OP)
#pragma pack(1)
typedef struct ibdbits {
unsigned b_valid:1;
unsigned b_resv1:1;
unsigned b_wrap:1;
unsigned b_interrupt:1;
unsigned b_last:1;
unsigned b_resv2:1;
unsigned b_cm:1;
unsigned b_resv3:2;
unsigned b_sdn:1;
unsigned b_ddn:1;
unsigned b_dgbl:1;
unsigned b_dbo:2;
unsigned b_resv4:1;
unsigned b_ddtb:1;
unsigned b_resv5:2;
unsigned b_sgbl:1;
unsigned b_sbo:2;
unsigned b_resv6:1;
unsigned b_sdtb:1;
unsigned b_resv7:9;
} ibdbits_t;
#pragma pack(1)
typedef union ibdbitsu {
ibdbits_t b;
uint i;
} ibdbitsu_t;
#pragma pack(1)
typedef struct idma_buf_desc {
ibdbitsu_t ibd_bits; /* Status and Control */
uint ibd_datlen; /* Data length in buffer */
uint ibd_sbuf; /* Source buffer addr in host mem */
uint ibd_dbuf; /* Destination buffer addr in host mem */
} ibd_t;
#pragma pack(1)
typedef struct dcmbits {
unsigned b_fb:1;
unsigned b_lp:1;
unsigned b_resv1:3;
unsigned b_tc2:1;
unsigned b_resv2:1;
unsigned b_wrap:3;
unsigned b_sinc:1;
unsigned b_dinc:1;
unsigned b_erm:1;
unsigned b_dt:1;
unsigned b_sd:2;
} dcmbits_t;
#pragma pack(1)
typedef union dcmbitsu {
dcmbits_t b;
ushort i;
} dcmbitsu_t;
#pragma pack(1)
typedef struct pram_idma {
ushort pi_ibase;
dcmbitsu_t pi_dcmbits;
ushort pi_ibdptr;
ushort pi_dprbuf;
ushort pi_bufinv; /* internal to CPM */
ushort pi_ssmax;
ushort pi_dprinptr; /* internal to CPM */
ushort pi_sts;
ushort pi_dproutptr; /* internal to CPM */
ushort pi_seob;
ushort pi_deob;
ushort pi_dts;
ushort pi_retadd;
ushort pi_resv1; /* internal to CPM */
uint pi_bdcnt;
uint pi_sptr;
uint pi_dptr;
uint pi_istate;
} pram_idma_t;
volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
volatile ibd_t *bdf;
volatile pram_idma_t *piptr;
volatile int dmadone;
volatile int *dmadonep = &dmadone;
void dmadone_handler (void *);
int idma_init (void);
void idma_start (int, int, int, uint, uint, int);
uint dpalloc (uint, uint);
uint dpinit_done = 0;
#ifdef STANDALONE
int ctrlc (void)
{
if (tstc()) {
switch (getc ()) {
case 0x03: /* ^C - Control C */
return 1;
default:
break;
}
}
return 0;
}
void * memset(void * s,int c,size_t count)
{
char *xs = (char *) s;
while (count--)
*xs++ = c;
return s;
}
int memcmp(const void * cs,const void * ct,size_t count)
{
const unsigned char *su1, *su2;
int res = 0;
for( su1 = cs, su2 = ct; 0 < count; ++su1, ++su2, count--)
if ((res = *su1 - *su2) != 0)
break;
return res;
}
#endif /* STANDALONE */
#ifdef STANDALONE
int mem_to_mem_idma2intr (int argc, char * const argv[])
#else
int do_idma (bd_t * bd, int argc, char * const argv[])
#endif /* STANDALONE */
{
int i;
app_startup(argv);
dpinit_done = 0;
idma_init ();
DEBUG ("Installing dma handler\n");
install_hdlr (7, dmadone_handler, (void *) bdf);
memset ((void *) 0x100000, 'a', 512);
memset ((void *) 0x200000, 'b', 512);
for (i = 0; i < 32; i++) {
printf ("Startin IDMA, iteration=%d\n", i);
idma_start (1, 1, 512, 0x100000, 0x200000, 3);
}
DEBUG ("Uninstalling dma handler\n");
free_hdlr (7);
return 0;
}
void
idma_start (int sinc, int dinc, int sz, uint sbuf, uint dbuf, int ttype)
{
/* ttype is for M-M, M-P, P-M or P-P: not used for now */
piptr->pi_istate = 0; /* manual says: clear it before every START_IDMA */
piptr->pi_dcmbits.b.b_resv1 = 0;
if (sinc == 1)
piptr->pi_dcmbits.b.b_sinc = 1;
else
piptr->pi_dcmbits.b.b_sinc = 0;
if (dinc == 1)
piptr->pi_dcmbits.b.b_dinc = 1;
else
piptr->pi_dcmbits.b.b_dinc = 0;
piptr->pi_dcmbits.b.b_erm = 0;
piptr->pi_dcmbits.b.b_sd = 0x00; /* M-M */
bdf->ibd_sbuf = sbuf;
bdf->ibd_dbuf = dbuf;
bdf->ibd_bits.b.b_cm = 0;
bdf->ibd_bits.b.b_interrupt = 1;
bdf->ibd_bits.b.b_wrap = 1;
bdf->ibd_bits.b.b_last = 1;
bdf->ibd_bits.b.b_sdn = 0;
bdf->ibd_bits.b.b_ddn = 0;
bdf->ibd_bits.b.b_dgbl = 0;
bdf->ibd_bits.b.b_ddtb = 0;
bdf->ibd_bits.b.b_sgbl = 0;
bdf->ibd_bits.b.b_sdtb = 0;
bdf->ibd_bits.b.b_dbo = 1;
bdf->ibd_bits.b.b_sbo = 1;
bdf->ibd_bits.b.b_valid = 1;
bdf->ibd_datlen = 512;
*dmadonep = 0;
immap->im_sdma.sdma_idmr2 = (uchar) 0xf;
immap->im_cpm.cp_cpcr = mk_cr_cmd (CPM_CR_IDMA2_PAGE,
CPM_CR_IDMA2_SBLOCK, 0x0,
0x9) | 0x00010000;
while (*dmadonep != 1) {
if (ctrlc ()) {
DEBUG ("\nInterrupted waiting for DMA interrupt.\n");
goto done;
}
printf ("Waiting for DMA interrupt (dmadone=%d b_valid = %d)...\n",
dmadone, bdf->ibd_bits.b.b_valid);
udelay (1000000);
}
printf ("DMA complete notification received!\n");
done:
DEBUG ("memcmp(0x%08x, 0x%08x, 512) = %d\n",
sbuf, dbuf, memcmp ((void *) sbuf, (void *) dbuf, 512));
return;
}
#define MAX_INT_BUFSZ 64
#define DCM_WRAP 0 /* MUST be consistant with MAX_INT_BUFSZ */
int idma_init (void)
{
uint memaddr;
immap->im_cpm.cp_rccr &= ~0x00F3FFFF;
immap->im_cpm.cp_rccr |= 0x00A00A00;
memaddr = dpalloc (sizeof (pram_idma_t), 64);
*(volatile u16 *)&immap->im_dprambase16
[PROFF_IDMA2_BASE / sizeof(u16)] = memaddr;
piptr = (volatile pram_idma_t *) ((uint) (immap) + memaddr);
piptr->pi_resv1 = 0; /* manual says: clear it */
piptr->pi_dcmbits.b.b_fb = 0;
piptr->pi_dcmbits.b.b_lp = 1;
piptr->pi_dcmbits.b.b_erm = 0;
piptr->pi_dcmbits.b.b_dt = 0;
memaddr = (uint) dpalloc (sizeof (ibd_t), 64);
piptr->pi_ibase = piptr->pi_ibdptr = (volatile short) memaddr;
bdf = (volatile ibd_t *) ((uint) (immap) + memaddr);
bdf->ibd_bits.b.b_valid = 0;
memaddr = (uint) dpalloc (64, 64);
piptr->pi_dprbuf = (volatile ushort) memaddr;
piptr->pi_dcmbits.b.b_wrap = 4;
piptr->pi_ssmax = 32;
piptr->pi_sts = piptr->pi_ssmax;
piptr->pi_dts = piptr->pi_ssmax;
return 1;
}
void dmadone_handler (void *arg)
{
immap->im_sdma.sdma_idmr2 = (uchar) 0x0;
*dmadonep = 1;
return;
}
static uint dpbase = 0;
uint dpalloc (uint size, uint align)
{
volatile immap_t *immr = (immap_t *) CONFIG_SYS_IMMR;
uint retloc;
uint align_mask, off;
uint savebase;
/* Pointer to initial global data area */
if (dpinit_done == 0) {
dpbase = gd->arch.dp_alloc_base;
dpinit_done = 1;
}
align_mask = align - 1;
savebase = dpbase;
if ((off = (dpbase & align_mask)) != 0)
dpbase += (align - off);
if ((off = size & align_mask) != 0)
size += align - off;
if ((dpbase + size) >= gd->arch.dp_alloc_top) {
dpbase = savebase;
printf ("dpalloc: ran out of dual port ram!");
return 0;
}
retloc = dpbase;
dpbase += size;
memset ((void *) &immr->im_dprambase[retloc], 0, size);
return (retloc);
}