1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause
59 	dbdma_channel_t 	*channel; 	/* DBDMA channel */  member
61 	struct pcm_channel 	*pcm;		/* PCM channel */
71 aoa_dma_set_program(struct aoa_dma *dma)  in aoa_dma_set_program()  argument
76 	addr = (u_int32_t)dma->buf->buf_addr;  in aoa_dma_set_program()
77 	KASSERT(dma->bufsz == dma->buf->bufsize, ("bad size"));  in aoa_dma_set_program()
79 	dma->slots = dma->bufsz / dma->blksz;  in aoa_dma_set_program()
81 	for (i = 0; i < dma->slots; ++i) {  in aoa_dma_set_program()
82 		dbdma_insert_command(dma->channel,   in aoa_dma_set_program()
87 		    dma->blksz, /* count */  in aoa_dma_set_program()
91 		    dma->slots + 1 /* branch_slot */  in aoa_dma_set_program()
94 		addr += dma->blksz;  in aoa_dma_set_program()
98 	dbdma_insert_branch(dma->channel, dma->slots, 0);  in aoa_dma_set_program()
101 	dbdma_insert_stop(dma->channel, dma->slots + 1);  in aoa_dma_set_program()
104 	dbdma_set_branch_selector(dma->channel, 1 << 0, 1 << 0);  in aoa_dma_set_program()
105 	dbdma_set_device_status(dma->channel, 1 << 0, 0);  in aoa_dma_set_program()
107 	dbdma_sync_commands(dma->channel, BUS_DMASYNC_PREWRITE);  in aoa_dma_set_program()
115 	struct aoa_dma *dma;  in aoa_dma_create()  local
120 	self = sc->sc_dev;  in aoa_dma_create()
127 	dma = malloc(sizeof(*dma), M_DEVBUF, M_WAITOK | M_ZERO);  in aoa_dma_create()
128 	dma->tag = tag;  in aoa_dma_create()
129 	dma->bufsz = AOA_BUFFER_SIZE;  in aoa_dma_create()
130 	dma->blksz = PAGE_SIZE; /* initial blocksize */  in aoa_dma_create()
132 	mtx_init(&dma->mutex, "AOA", NULL, MTX_DEF);  in aoa_dma_create()
134 	sc->sc_intrp = dma;  in aoa_dma_create()
136 	return (dma);  in aoa_dma_create()
140 aoa_dma_delete(struct aoa_dma *dma)  in aoa_dma_delete()  argument
142 	bus_dma_tag_destroy(dma->tag);  in aoa_dma_delete()
143 	mtx_destroy(&dma->mutex);  in aoa_dma_delete()
144 	free(dma, M_DEVBUF);  in aoa_dma_delete()
150 	struct aoa_dma 		*dma = data;  in aoa_chan_setblocksize()  local
153 	DPRINTF(("aoa_chan_setblocksize: blocksz = %u, dma->blksz = %u\n",   in aoa_chan_setblocksize()
154 		blocksz, dma->blksz));  in aoa_chan_setblocksize()
155 	KASSERT(!dma->running, ("dma is running"));  in aoa_chan_setblocksize()
160 	blocksz = 1 << (31 - lz);  in aoa_chan_setblocksize()
164 	if (blocksz > dma->bufsz)  in aoa_chan_setblocksize()
165 		blocksz = dma->bufsz;  in aoa_chan_setblocksize()
167 	err = sndbuf_resize(dma->buf, dma->bufsz / blocksz, blocksz);  in aoa_chan_setblocksize()
173 	if (blocksz == dma->blksz)  in aoa_chan_setblocksize()
174 		return (dma->blksz);  in aoa_chan_setblocksize()
177 	err = dbdma_resize_channel(dma->channel, 2 + dma->bufsz / blocksz);  in aoa_chan_setblocksize()
184 	dma->blksz = blocksz;  in aoa_chan_setblocksize()
185 	aoa_dma_set_program(dma);  in aoa_chan_setblocksize()
187 	return (dma->blksz);  in aoa_chan_setblocksize()
212 	struct aoa_dma 	 *dma = data;  in aoa_chan_getptr()  local
214 	if (!dma->running)  in aoa_chan_getptr()
217 	return (dma->slot * dma->blksz);  in aoa_chan_getptr()
225 	struct aoa_dma		*dma;  in aoa_chan_init()  local
230 	dma = aoa_dma_create(sc);  in aoa_chan_init()
231 	if (!dma)  in aoa_chan_init()
233 	dma->pcm = c;  in aoa_chan_init()
234 	dma->buf = b;  in aoa_chan_init()
235 	dma->reg = sc->sc_odma;  in aoa_chan_init()
238 	max_slots = 2 + dma->bufsz / dma->blksz;  in aoa_chan_init()
239 	err = dbdma_allocate_channel(dma->reg, 0, bus_get_dma_tag(sc->sc_dev),  in aoa_chan_init()
240 	    max_slots, &dma->channel );  in aoa_chan_init()
242 		aoa_dma_delete(dma);  in aoa_chan_init()
246 	if (sndbuf_alloc(dma->buf, dma->tag, 0, dma->bufsz) != 0) {  in aoa_chan_init()
247 		dbdma_free_channel(dma->channel);  in aoa_chan_init()
248 		aoa_dma_delete(dma);  in aoa_chan_init()
252 	aoa_dma_set_program(dma);  in aoa_chan_init()
254 	return (dma);  in aoa_chan_init()
260 	struct aoa_dma 	*dma = data;  in aoa_chan_trigger()  local
266 		/* Start the DMA. */  in aoa_chan_trigger()
267 		dma->running = 1;  in aoa_chan_trigger()
269 		dma->slot = 0;  in aoa_chan_trigger()
270 		dbdma_set_current_cmd(dma->channel, dma->slot);  in aoa_chan_trigger()
272 		dbdma_run(dma->channel);  in aoa_chan_trigger()
279 		mtx_lock(&dma->mutex);  in aoa_chan_trigger()
281 		dma->running = 0;  in aoa_chan_trigger()
284 		dbdma_set_device_status(dma->channel, 1 << 0, 1 << 0);  in aoa_chan_trigger()
289 		/* Reset the DMA. */  in aoa_chan_trigger()
290 		dbdma_stop(dma->channel);  in aoa_chan_trigger()
291 		dbdma_set_device_status(dma->channel, 1 << 0, 0);  in aoa_chan_trigger()
293 		for (i = 0; i < dma->slots; ++i)  in aoa_chan_trigger()
294 			dbdma_clear_cmd_status(dma->channel, i);  in aoa_chan_trigger()
296 		mtx_unlock(&dma->mutex);  in aoa_chan_trigger()
307 	struct aoa_dma 	*dma = data;  in aoa_chan_free()  local
309 	sndbuf_free(dma->buf);  in aoa_chan_free()
310 	dbdma_free_channel(dma->channel);  in aoa_chan_free()
311 	aoa_dma_delete(dma);  in aoa_chan_free()
320 	struct aoa_dma		*dma;  in aoa_interrupt()  local
322 	if (!(dma = sc->sc_intrp) || !dma->running)  in aoa_interrupt()
325 	mtx_lock(&dma->mutex);  in aoa_interrupt()
327 	while (dbdma_get_cmd_status(dma->channel, dma->slot)) {  in aoa_interrupt()
328 		dbdma_clear_cmd_status(dma->channel, dma->slot);  in aoa_interrupt()
329 		dma->slot = (dma->slot + 1) % dma->slots;  in aoa_interrupt()
331 		mtx_unlock(&dma->mutex);  in aoa_interrupt()
332 		chn_intr(dma->pcm);  in aoa_interrupt()
333 		mtx_lock(&dma->mutex);  in aoa_interrupt()
336 	mtx_unlock(&dma->mutex);  in aoa_interrupt()
373 	self = sc->sc_dev;  in aoa_attach()