+++ /dev/null
-/* 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;
-}
-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);
-}
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