163 	struct ismt_desc	*desc;  member
229 	struct ismt_desc *desc;  in ismt_alloc_desc()  local
235 	desc = &sc->desc[sc->head++];  in ismt_alloc_desc()
239 	memset(desc, 0, sizeof(*desc));  in ismt_alloc_desc()
241 	return (desc);  in ismt_alloc_desc()
245 ismt_submit(struct ismt_softc *sc, struct ismt_desc *desc, uint8_t slave,  in ismt_submit()  argument
250 	desc->control |= ISMT_DESC_FAIR;  in ismt_submit()
252 		desc->control |= ISMT_DESC_INT;  in ismt_submit()
254 	desc->tgtaddr_rw = ISMT_DESC_ADDR_RW(slave, is_read);  in ismt_submit()
255 	desc->dptr_low = (sc->dma_buffer_bus_addr & 0xFFFFFFFFLL);  in ismt_submit()
256 	desc->dptr_high = (sc->dma_buffer_bus_addr >> 32);  in ismt_submit()
278 	ISMT_DEBUG(sc->pcidev, "%s status=0x%x\n", __func__, desc->status);  in ismt_submit()
280 	if (desc->status & ISMT_DESC_SCS)  in ismt_submit()
283 	if (desc->status & ISMT_DESC_NAK)  in ismt_submit()
286 	if (desc->status & ISMT_DESC_CRC)  in ismt_submit()
289 	if (desc->status & ISMT_DESC_COL)  in ismt_submit()
292 	if (desc->status & ISMT_DESC_LPR)  in ismt_submit()
295 	if (desc->status & (ISMT_DESC_DLTO | ISMT_DESC_CLTO))  in ismt_submit()
305 	struct ismt_desc	*desc;  in ismt_quick()  local
316 	desc = ismt_alloc_desc(sc);  in ismt_quick()
318 	return (ismt_submit(sc, desc, slave, is_read));  in ismt_quick()
324 	struct ismt_desc	*desc;  in ismt_sendb()  local
330 	desc = ismt_alloc_desc(sc);  in ismt_sendb()
331 	desc->control = ISMT_DESC_CWRL;  in ismt_sendb()
332 	desc->wr_len_cmd = byte;  in ismt_sendb()
334 	return (ismt_submit(sc, desc, slave, 0));  in ismt_sendb()
340 	struct ismt_desc	*desc;  in ismt_recvb()  local
347 	desc = ismt_alloc_desc(sc);  in ismt_recvb()
348 	desc->rd_len = 1;  in ismt_recvb()
350 	err = ismt_submit(sc, desc, slave, 1);  in ismt_recvb()
363 	struct ismt_desc	*desc;  in ismt_writeb()  local
369 	desc = ismt_alloc_desc(sc);  in ismt_writeb()
370 	desc->wr_len_cmd = 2;  in ismt_writeb()
374 	return (ismt_submit(sc, desc, slave, 0));  in ismt_writeb()
380 	struct ismt_desc	*desc;  in ismt_writew()  local
386 	desc = ismt_alloc_desc(sc);  in ismt_writew()
387 	desc->wr_len_cmd = 3;  in ismt_writew()
392 	return (ismt_submit(sc, desc, slave, 0));  in ismt_writew()
398 	struct ismt_desc	*desc;  in ismt_readb()  local
405 	desc = ismt_alloc_desc(sc);  in ismt_readb()
406 	desc->control = ISMT_DESC_CWRL;  in ismt_readb()
407 	desc->wr_len_cmd = cmd;  in ismt_readb()
408 	desc->rd_len = 1;  in ismt_readb()
410 	err = ismt_submit(sc, desc, slave, 1);  in ismt_readb()
423 	struct ismt_desc	*desc;  in ismt_readw()  local
430 	desc = ismt_alloc_desc(sc);  in ismt_readw()
431 	desc->control = ISMT_DESC_CWRL;  in ismt_readw()
432 	desc->wr_len_cmd = cmd;  in ismt_readw()
433 	desc->rd_len = 2;  in ismt_readw()
435 	err = ismt_submit(sc, desc, slave, 1);  in ismt_readw()
448 	struct ismt_desc	*desc;  in ismt_pcall()  local
455 	desc = ismt_alloc_desc(sc);  in ismt_pcall()
456 	desc->wr_len_cmd = 3;  in ismt_pcall()
457 	desc->rd_len = 2;  in ismt_pcall()
462 	err = ismt_submit(sc, desc, slave, 0);  in ismt_pcall()
475 	struct ismt_desc	*desc;  in ismt_bwrite()  local
484 	desc = ismt_alloc_desc(sc);  in ismt_bwrite()
485 	desc->control = ISMT_DESC_I2C;  in ismt_bwrite()
486 	desc->wr_len_cmd = count + 1;  in ismt_bwrite()
490 	return (ismt_submit(sc, desc, slave, 0));  in ismt_bwrite()
496 	struct ismt_desc	*desc;  in ismt_bread()  local
506 	desc = ismt_alloc_desc(sc);  in ismt_bread()
507 	desc->control = ISMT_DESC_I2C | ISMT_DESC_CWRL;  in ismt_bread()
508 	desc->wr_len_cmd = cmd;  in ismt_bread()
509 	desc->rd_len = *count;  in ismt_bread()
511 	err = ismt_submit(sc, desc, slave, 0);  in ismt_bread()
516 	memcpy(buf, sc->dma_buffer, desc->rxbytes);  in ismt_bread()
517 	*count = desc->rxbytes;  in ismt_bread()
558 	bus_dmamem_free(sc->desc_dma_tag, sc->desc,  in ismt_detach()
632 	    (void **)&sc->desc, BUS_DMA_WAITOK,  in ismt_attach()
639 	    sc->desc_dma_map, sc->desc, DESC_SIZE,  in ismt_attach()
722 	const char *desc;  in ismt_probe()  local
726 		desc = "Atom Processor S1200 SMBus 2.0 Controller 0";  in ismt_probe()
729 		desc = "Atom Processor S1200 SMBus 2.0 Controller 1";  in ismt_probe()
732 		desc = "Atom Processor C2000 SMBus 2.0";  in ismt_probe()
735 		desc = "Atom Processor C3000 SMBus 2.0";  in ismt_probe()
741 	device_set_desc(dev, desc);  in ismt_probe()