1 /* The dpalloc function used and implemented in this file was derieved
2 * from PPCBoot/U-Boot file "cpu/mpc8260/commproc.c".
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.
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.
35 #ifndef STANDALONE /* Linked into/Part of PPCBoot */
38 #else /* Standalone app of PPCBoot */
39 #define WATCHDOG_RESET() { \
40 *(ushort *)(CFG_IMMR + 0x1000E) = 0x556c; \
41 *(ushort *)(CFG_IMMR + 0x1000E) = 0xaa39; \
43 #endif /* STANDALONE */
47 #define DEBUG(fmt, args...) { \
49 printf("[%s %d %s]: ",__FILE__,__LINE__,__FUNCTION__); \
50 printf(fmt, ##args); \
54 #define CPM_CR_IDMA1_SBLOCK (0x14)
55 #define CPM_CR_IDMA2_SBLOCK (0x15)
56 #define CPM_CR_IDMA3_SBLOCK (0x16)
57 #define CPM_CR_IDMA4_SBLOCK (0x17)
58 #define CPM_CR_IDMA1_PAGE (0x07)
59 #define CPM_CR_IDMA2_PAGE (0x08)
60 #define CPM_CR_IDMA3_PAGE (0x09)
61 #define CPM_CR_IDMA4_PAGE (0x0a)
62 #define PROFF_IDMA1_BASE ((uint)0x87fe)
63 #define PROFF_IDMA2_BASE ((uint)0x88fe)
64 #define PROFF_IDMA3_BASE ((uint)0x89fe)
65 #define PROFF_IDMA4_BASE ((uint)0x8afe)
67 #define CPM_CR_INIT_TRX ((ushort)0x0000)
68 #define CPM_CR_FLG ((ushort)0x0001)
70 #define mk_cr_cmd(PG, SBC, MCN, OP) \
71 ((PG << 26) | (SBC << 21) | (MCN << 6) | OP)
75 typedef struct ibdbits {
79 unsigned b_interrupt:1;
99 typedef union ibdbitsu {
105 typedef struct idma_buf_desc {
106 ibdbitsu_t ibd_bits; /* Status and Control */
107 uint ibd_datlen; /* Data length in buffer */
108 uint ibd_sbuf; /* Source buffer addr in host mem */
109 uint ibd_dbuf; /* Destination buffer addr in host mem */
114 typedef struct dcmbits {
129 typedef union dcmbitsu {
135 typedef struct pram_idma {
137 dcmbitsu_t pi_dcmbits;
140 ushort pi_bufinv; /* internal to CPM */
142 ushort pi_dprinptr; /* internal to CPM */
144 ushort pi_dproutptr; /* internal to CPM */
149 ushort pi_resv1; /* internal to CPM */
157 volatile immap_t *immap = (immap_t *) CFG_IMMR;
159 volatile pram_idma_t *piptr;
161 volatile int dmadone;
162 volatile int *dmadonep = &dmadone;
163 void dmadone_handler (void *);
165 int idma_init (void);
166 void idma_start (int, int, int, uint, uint, int);
167 uint dpalloc (uint, uint);
170 uint dpinit_done = 0;
178 case 0x03: /* ^C - Control C */
186 void * memset(void * s,int c,size_t count)
188 char *xs = (char *) s;
193 int memcmp(const void * cs,const void * ct,size_t count)
195 const unsigned char *su1, *su2;
197 for( su1 = cs, su2 = ct; 0 < count; ++su1, ++su2, count--)
198 if ((res = *su1 - *su2) != 0)
202 #endif /* STANDALONE */
205 int mem_to_mem_idma2intr (int argc, char *argv[])
207 int do_idma (bd_t * bd, int argc, char *argv[])
208 #endif /* STANDALONE */
217 DEBUG ("Installing dma handler\n");
218 install_hdlr (7, dmadone_handler, (void *) bdf);
220 memset ((void *) 0x100000, 'a', 512);
221 memset ((void *) 0x200000, 'b', 512);
223 for (i = 0; i < 32; i++) {
224 printf ("Startin IDMA, iteration=%d\n", i);
225 idma_start (1, 1, 512, 0x100000, 0x200000, 3);
228 DEBUG ("Uninstalling dma handler\n");
235 idma_start (int sinc, int dinc, int sz, uint sbuf, uint dbuf, int ttype)
237 /* ttype is for M-M, M-P, P-M or P-P: not used for now */
239 piptr->pi_istate = 0; /* manual says: clear it before every START_IDMA */
240 piptr->pi_dcmbits.b.b_resv1 = 0;
243 piptr->pi_dcmbits.b.b_sinc = 1;
245 piptr->pi_dcmbits.b.b_sinc = 0;
248 piptr->pi_dcmbits.b.b_dinc = 1;
250 piptr->pi_dcmbits.b.b_dinc = 0;
252 piptr->pi_dcmbits.b.b_erm = 0;
253 piptr->pi_dcmbits.b.b_sd = 0x00; /* M-M */
255 bdf->ibd_sbuf = sbuf;
256 bdf->ibd_dbuf = dbuf;
257 bdf->ibd_bits.b.b_cm = 0;
258 bdf->ibd_bits.b.b_interrupt = 1;
259 bdf->ibd_bits.b.b_wrap = 1;
260 bdf->ibd_bits.b.b_last = 1;
261 bdf->ibd_bits.b.b_sdn = 0;
262 bdf->ibd_bits.b.b_ddn = 0;
263 bdf->ibd_bits.b.b_dgbl = 0;
264 bdf->ibd_bits.b.b_ddtb = 0;
265 bdf->ibd_bits.b.b_sgbl = 0;
266 bdf->ibd_bits.b.b_sdtb = 0;
267 bdf->ibd_bits.b.b_dbo = 1;
268 bdf->ibd_bits.b.b_sbo = 1;
269 bdf->ibd_bits.b.b_valid = 1;
270 bdf->ibd_datlen = 512;
274 immap->im_sdma.sdma_idmr2 = (uchar) 0xf;
276 immap->im_cpm.cp_cpcr = mk_cr_cmd (CPM_CR_IDMA2_PAGE,
277 CPM_CR_IDMA2_SBLOCK, 0x0,
280 while (*dmadonep != 1) {
282 DEBUG ("\nInterrupted waiting for DMA interrupt.\n");
285 printf ("Waiting for DMA interrupt (dmadone=%d b_valid = %d)...\n",
286 dmadone, bdf->ibd_bits.b.b_valid);
289 printf ("DMA complete notification received!\n");
292 DEBUG ("memcmp(0x%08x, 0x%08x, 512) = %d\n",
293 sbuf, dbuf, memcmp ((void *) sbuf, (void *) dbuf, 512));
298 #define MAX_INT_BUFSZ 64
299 #define DCM_WRAP 0 /* MUST be consistant with MAX_INT_BUFSZ */
305 immap->im_cpm.cp_rccr &= ~0x00F3FFFF;
306 immap->im_cpm.cp_rccr |= 0x00A00A00;
308 memaddr = dpalloc (sizeof (pram_idma_t), 64);
310 *(volatile ushort *) &immap->im_dprambase[PROFF_IDMA2_BASE] = memaddr;
311 piptr = (volatile pram_idma_t *) ((uint) (immap) + memaddr);
313 piptr->pi_resv1 = 0; /* manual says: clear it */
314 piptr->pi_dcmbits.b.b_fb = 0;
315 piptr->pi_dcmbits.b.b_lp = 1;
316 piptr->pi_dcmbits.b.b_erm = 0;
317 piptr->pi_dcmbits.b.b_dt = 0;
319 memaddr = (uint) dpalloc (sizeof (ibd_t), 64);
320 piptr->pi_ibase = piptr->pi_ibdptr = (volatile short) memaddr;
321 bdf = (volatile ibd_t *) ((uint) (immap) + memaddr);
322 bdf->ibd_bits.b.b_valid = 0;
324 memaddr = (uint) dpalloc (64, 64);
325 piptr->pi_dprbuf = (volatile ushort) memaddr;
326 piptr->pi_dcmbits.b.b_wrap = 4;
327 piptr->pi_ssmax = 32;
329 piptr->pi_sts = piptr->pi_ssmax;
330 piptr->pi_dts = piptr->pi_ssmax;
335 void dmadone_handler (void *arg)
337 immap->im_sdma.sdma_idmr2 = (uchar) 0x0;
345 static uint dpbase = 0;
347 uint dpalloc (uint size, uint align)
349 DECLARE_GLOBAL_DATA_PTR;
351 volatile immap_t *immr = (immap_t *) CFG_IMMR;
353 uint align_mask, off;
356 /* Pointer to initial global data area */
358 if (dpinit_done == 0) {
359 dpbase = gd->dp_alloc_base;
363 align_mask = align - 1;
366 if ((off = (dpbase & align_mask)) != 0)
367 dpbase += (align - off);
369 if ((off = size & align_mask) != 0)
372 if ((dpbase + size) >= gd->dp_alloc_top) {
374 printf ("dpalloc: ran out of dual port ram!");
381 memset ((void *) &immr->im_dprambase[retloc], 0, size);