1 // SPDX-License-Identifier: GPL-2.0-or-later
10  *  acknowledged.  Full credit goes to them - any problems within this code
24  *  @rp:	pointer to current risc program position
25  *  @sglist:	pointer to "scatter-gather list" of buffer pointers
27  *  @sync_line:	0 -> no sync, 1 -> odd sync, 2 -> even sync
33 static __le32 *tw68_risc_field(__le32 *rp, struct scatterlist *sglist,  in tw68_risc_field()  argument
42 		*(rp++) = cpu_to_le32(RISC_JUMP);  in tw68_risc_field()
43 		*(rp++) = 0;  in tw68_risc_field()
48 		*(rp++) = cpu_to_le32(RISC_SYNCO);  in tw68_risc_field()
50 		*(rp++) = cpu_to_le32(RISC_SYNCE);  in tw68_risc_field()
51 	*(rp++) = 0;  in tw68_risc_field()
58 			offset -= sg_dma_len(sg);  in tw68_risc_field()
61 		if (bpl <= sg_dma_len(sg) - offset) {  in tw68_risc_field()
63 			*(rp++) = cpu_to_le32(RISC_LINESTART |  in tw68_risc_field()
65 			*(rp++) = cpu_to_le32(sg_dma_address(sg) + offset);  in tw68_risc_field()
72 			 * given by the scatter-gather list.  in tw68_risc_field()
76 			done = (sg_dma_len(sg) - offset);  in tw68_risc_field()
77 			*(rp++) = cpu_to_le32(RISC_LINESTART |  in tw68_risc_field()
80 			*(rp++) = cpu_to_le32(sg_dma_address(sg) + offset);  in tw68_risc_field()
81 			todo -= done;  in tw68_risc_field()
85 				*(rp++) = cpu_to_le32(RISC_INLINE |  in tw68_risc_field()
88 				*(rp++) = cpu_to_le32(sg_dma_address(sg));  in tw68_risc_field()
89 				todo -= sg_dma_len(sg);  in tw68_risc_field()
94 				/* final chunk - offset 0, count 'todo' */  in tw68_risc_field()
95 				*(rp++) = cpu_to_le32(RISC_INLINE |  in tw68_risc_field()
98 				*(rp++) = cpu_to_le32(sg_dma_address(sg));  in tw68_risc_field()
105 	return rp;  in tw68_risc_field()
111  *	This routine is called by tw68-video.  It allocates
119  *	@sglist:	scatter-gather list entry
138 	__le32 *rp;  in tw68_risc_buffer()  local
153 	buf->size = instructions * 8;  in tw68_risc_buffer()
154 	buf->cpu = dma_alloc_coherent(&pci->dev, buf->size, &buf->dma,  in tw68_risc_buffer()
156 	if (buf->cpu == NULL)  in tw68_risc_buffer()
157 		return -ENOMEM;  in tw68_risc_buffer()
160 	rp = buf->cpu;  in tw68_risc_buffer()
162 		rp = tw68_risc_field(rp, sglist, top_offset, 1,  in tw68_risc_buffer()
165 		rp = tw68_risc_field(rp, sglist, bottom_offset, 2,  in tw68_risc_buffer()
169 	buf->jmp = rp;  in tw68_risc_buffer()
170 	buf->cpu[1] = cpu_to_le32(buf->dma + 8);  in tw68_risc_buffer()
172 	BUG_ON((buf->jmp - buf->cpu + 2) * sizeof(buf->cpu[0]) > buf->size);  in tw68_risc_buffer()
177 /* ------------------------------------------------------------------ */
199 		pr_debug("0x%08x [ INVALID ]\n", risc);
202 	pr_debug("0x%08x %-9s IRQ=%d",
207 		pr_debug(" Start=0x%03x Count=%03u",
210 		pr_debug(" StartAddr=0x%08x", addr);
218 	pr_debug("%s: risc_program_dump: risc=%p, buf->cpu=0x%p, buf->jmp=0x%p\n",
219 		  core->name, buf, buf->cpu, buf->jmp);
220 	for (addr = buf->cpu; addr <= buf->jmp; addr += 2)