1 /* The dpalloc function used and implemented in this file was derieved
2 * from PPCBoot/U-Boot file "cpu/mpc8260/commproc.c".
5 /* Author: Arun Dharankar <ADharankar@ATTBI.Com>
6 * This example is meant to only demonstrate how the IDMA could be used.
10 * This file is based on "arch/ppc/8260_io/commproc.c" - here is it's
13 * General Purpose functions for the global management of the
14 * 8260 Communication Processor Module.
15 * Copyright (c) 1999 Dan Malek (dmalek@jlc.net)
16 * Copyright (c) 2000 MontaVista Software, Inc (source@mvista.com)
19 * In addition to the individual control of the communication
20 * channels, there are a few functions that globally affect the
21 * communication processor.
23 * Buffer descriptors must be allocated from the dual ported memory
24 * space. The allocator for that is here. When the communication
25 * process is reset, we reclaim the memory available. There is
26 * currently no deallocator for this memory.
36 #ifndef STANDALONE /* Linked into/Part of PPCBoot */
39 #else /* Standalone app of PPCBoot */
41 #define printf mon_printf
45 #define udelay mon_udelay
46 #define malloc mon_malloc
47 #define WATCHDOG_RESET() { \
48 *(ushort *)(CFG_IMMR + 0x1000E) = 0x556c; \
49 *(ushort *)(CFG_IMMR + 0x1000E) = 0xaa39; \
51 #endif /* STANDALONE */
55 #define DEBUG(fmt, args...) { \
57 printf("[%s %d %s]: ",__FILE__,__LINE__,__FUNCTION__); \
58 printf(fmt, ##args); \
62 #define CPM_CR_IDMA1_SBLOCK (0x14)
63 #define CPM_CR_IDMA2_SBLOCK (0x15)
64 #define CPM_CR_IDMA3_SBLOCK (0x16)
65 #define CPM_CR_IDMA4_SBLOCK (0x17)
66 #define CPM_CR_IDMA1_PAGE (0x07)
67 #define CPM_CR_IDMA2_PAGE (0x08)
68 #define CPM_CR_IDMA3_PAGE (0x09)
69 #define CPM_CR_IDMA4_PAGE (0x0a)
70 #define PROFF_IDMA1_BASE ((uint)0x87fe)
71 #define PROFF_IDMA2_BASE ((uint)0x88fe)
72 #define PROFF_IDMA3_BASE ((uint)0x89fe)
73 #define PROFF_IDMA4_BASE ((uint)0x8afe)
75 #define CPM_CR_INIT_TRX ((ushort)0x0000)
76 #define CPM_CR_FLG ((ushort)0x0001)
78 #define mk_cr_cmd(PG, SBC, MCN, OP) \
79 ((PG << 26) | (SBC << 21) | (MCN << 6) | OP)
83 typedef struct ibdbits {
87 unsigned b_interrupt:1;
107 typedef union ibdbitsu {
113 typedef struct idma_buf_desc {
114 ibdbitsu_t ibd_bits; /* Status and Control */
115 uint ibd_datlen; /* Data length in buffer */
116 uint ibd_sbuf; /* Source buffer addr in host mem */
117 uint ibd_dbuf; /* Destination buffer addr in host mem */
122 typedef struct dcmbits {
137 typedef union dcmbitsu {
143 typedef struct pram_idma {
145 dcmbitsu_t pi_dcmbits;
148 ushort pi_bufinv; /* internal to CPM */
150 ushort pi_dprinptr; /* internal to CPM */
152 ushort pi_dproutptr; /* internal to CPM */
157 ushort pi_resv1; /* internal to CPM */
165 volatile immap_t *immap = (immap_t *) CFG_IMMR;
167 volatile pram_idma_t *piptr;
169 volatile int dmadone;
170 volatile int *dmadonep = &dmadone;
171 void dmadone_handler (void *);
173 int idma_init (void);
174 void idma_start (int, int, int, uint, uint, int);
175 uint dpalloc (uint, uint);
178 uint dpinit_done = 0;
185 switch (mon_getc ()) {
186 case 0x03: /* ^C - Control C */
194 void * memset(void * s,int c,size_t count)
196 char *xs = (char *) s;
201 int memcmp(const void * cs,const void * ct,size_t count)
203 const unsigned char *su1, *su2;
205 for( su1 = cs, su2 = ct; 0 < count; ++su1, ++su2, count--)
206 if ((res = *su1 - *su2) != 0)
210 #endif /* STANDALONE */
213 int mem_to_mem_idma2intr (bd_t * bd, int argc, char *argv[])
215 int do_idma (bd_t * bd, int argc, char *argv[])
216 #endif /* STANDALONE */
224 DEBUG ("Installing dma handler\n");
225 mon_install_hdlr (7, dmadone_handler, (void *) bdf);
227 memset ((void *) 0x100000, 'a', 512);
228 memset ((void *) 0x200000, 'b', 512);
230 for (i = 0; i < 32; i++) {
231 printf ("Startin IDMA, iteration=%d\n", i);
232 idma_start (1, 1, 512, 0x100000, 0x200000, 3);
235 DEBUG ("Uninstalling dma handler\n");
242 idma_start (int sinc, int dinc, int sz, uint sbuf, uint dbuf, int ttype)
244 /* ttype is for M-M, M-P, P-M or P-P: not used for now */
246 piptr->pi_istate = 0; /* manual says: clear it before every START_IDMA */
247 piptr->pi_dcmbits.b.b_resv1 = 0;
250 piptr->pi_dcmbits.b.b_sinc = 1;
252 piptr->pi_dcmbits.b.b_sinc = 0;
255 piptr->pi_dcmbits.b.b_dinc = 1;
257 piptr->pi_dcmbits.b.b_dinc = 0;
259 piptr->pi_dcmbits.b.b_erm = 0;
260 piptr->pi_dcmbits.b.b_sd = 0x00; /* M-M */
262 bdf->ibd_sbuf = sbuf;
263 bdf->ibd_dbuf = dbuf;
264 bdf->ibd_bits.b.b_cm = 0;
265 bdf->ibd_bits.b.b_interrupt = 1;
266 bdf->ibd_bits.b.b_wrap = 1;
267 bdf->ibd_bits.b.b_last = 1;
268 bdf->ibd_bits.b.b_sdn = 0;
269 bdf->ibd_bits.b.b_ddn = 0;
270 bdf->ibd_bits.b.b_dgbl = 0;
271 bdf->ibd_bits.b.b_ddtb = 0;
272 bdf->ibd_bits.b.b_sgbl = 0;
273 bdf->ibd_bits.b.b_sdtb = 0;
274 bdf->ibd_bits.b.b_dbo = 1;
275 bdf->ibd_bits.b.b_sbo = 1;
276 bdf->ibd_bits.b.b_valid = 1;
277 bdf->ibd_datlen = 512;
281 immap->im_sdma.sdma_idmr2 = (uchar) 0xf;
283 immap->im_cpm.cp_cpcr = mk_cr_cmd (CPM_CR_IDMA2_PAGE,
284 CPM_CR_IDMA2_SBLOCK, 0x0,
287 while (*dmadonep != 1) {
289 DEBUG ("\nInterrupted waiting for DMA interrupt.\n");
292 printf ("Waiting for DMA interrupt (dmadone=%d b_valid = %d)...\n",
293 dmadone, bdf->ibd_bits.b.b_valid);
296 printf ("DMA complete notification received!\n");
299 DEBUG ("memcmp(0x%08x, 0x%08x, 512) = %d\n",
300 sbuf, dbuf, memcmp ((void *) sbuf, (void *) dbuf, 512));
305 #define MAX_INT_BUFSZ 64
306 #define DCM_WRAP 0 /* MUST be consistant with MAX_INT_BUFSZ */
312 immap->im_cpm.cp_rccr &= ~0x00F3FFFF;
313 immap->im_cpm.cp_rccr |= 0x00A00A00;
315 memaddr = dpalloc (sizeof (pram_idma_t), 64);
317 *(volatile ushort *) &immap->im_dprambase[PROFF_IDMA2_BASE] = memaddr;
318 piptr = (volatile pram_idma_t *) ((uint) (immap) + memaddr);
320 piptr->pi_resv1 = 0; /* manual says: clear it */
321 piptr->pi_dcmbits.b.b_fb = 0;
322 piptr->pi_dcmbits.b.b_lp = 1;
323 piptr->pi_dcmbits.b.b_erm = 0;
324 piptr->pi_dcmbits.b.b_dt = 0;
326 memaddr = (uint) dpalloc (sizeof (ibd_t), 64);
327 piptr->pi_ibase = piptr->pi_ibdptr = (volatile short) memaddr;
328 bdf = (volatile ibd_t *) ((uint) (immap) + memaddr);
329 bdf->ibd_bits.b.b_valid = 0;
331 memaddr = (uint) dpalloc (64, 64);
332 piptr->pi_dprbuf = (volatile ushort) memaddr;
333 piptr->pi_dcmbits.b.b_wrap = 4;
334 piptr->pi_ssmax = 32;
336 piptr->pi_sts = piptr->pi_ssmax;
337 piptr->pi_dts = piptr->pi_ssmax;
342 void dmadone_handler (void *arg)
344 immap->im_sdma.sdma_idmr2 = (uchar) 0x0;
352 static uint dpbase = 0;
354 uint dpalloc (uint size, uint align)
356 DECLARE_GLOBAL_DATA_PTR;
358 volatile immap_t *immr = (immap_t *) CFG_IMMR;
360 uint align_mask, off;
363 /* Pointer to initial global data area */
365 if (dpinit_done == 0) {
366 dpbase = gd->dp_alloc_base;
370 align_mask = align - 1;
373 if ((off = (dpbase & align_mask)) != 0)
374 dpbase += (align - off);
376 if ((off = size & align_mask) != 0)
379 if ((dpbase + size) >= gd->dp_alloc_top) {
381 printf ("dpalloc: ran out of dual port ram!");
388 memset ((void *) &immr->im_dprambase[retloc], 0, size);