1 /*-
53 /* Hardware Descriptor Constants - Control Field */
62 /* Hardware Descriptor Constants - Status Field */
83 #define ISMT_MSTR_MDBA		0x100	/* Master Descriptor Base Address */
86 #define ISMT_MSTR_MDS		0x110	/* Master Descriptor Size */
108 /* Master Descriptor Size (MDS) bit definitions */
109 #define ISMT_MDS_MASK	0xff	/* Master Descriptor Size mask (MDS) */
128 /* iSMT Hardware Descriptor */
182 	val = bus_read_4(sc->mmio_res, ISMT_MSTR_MSTS);  in ismt_intr()
183 	ISMT_DEBUG(sc->pcidev, "%s MSTS=0x%x\n", __func__, val);  in ismt_intr()
186 	bus_write_4(sc->mmio_res, ISMT_MSTR_MSTS, val);  in ismt_intr()
202 		    (uintptr_t *)&sc->bus_reserved,  in ismt_callback()
211 		KASSERT(sc->bus_reserved == curthread,  in ismt_callback()
214 		atomic_store_rel_ptr((uintptr_t *)&sc->bus_reserved,  in ismt_callback()
231 	KASSERT(sc->bus_reserved == curthread,  in ismt_alloc_desc()
233 	    curthread, sc->bus_reserved));  in ismt_alloc_desc()
235 	desc = &sc->desc[sc->head++];  in ismt_alloc_desc()
236 	if (sc->head == ISMT_DESC_ENTRIES)  in ismt_alloc_desc()
237 		sc->head = 0;  in ismt_alloc_desc()
250 	desc->control |= ISMT_DESC_FAIR;  in ismt_submit()
251 	if (sc->using_msi)  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()
260 	fmhp = sc->head << 16;  in ismt_submit()
261 	val = bus_read_4(sc->mmio_res, ISMT_MSTR_MCTRL);  in ismt_submit()
264 	bus_write_4(sc->mmio_res, ISMT_MSTR_MCTRL, val);  in ismt_submit()
267 	val = bus_read_4(sc->mmio_res, ISMT_MSTR_MCTRL);  in ismt_submit()
269 	bus_write_4(sc->mmio_res, ISMT_MSTR_MCTRL, val);  in ismt_submit()
274 		ISMT_DEBUG(sc->pcidev, "%s timeout\n", __func__);  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()
331 	desc->control = ISMT_DESC_CWRL;  in ismt_sendb()
332 	desc->wr_len_cmd = byte;  in ismt_sendb()
348 	desc->rd_len = 1;  in ismt_recvb()
355 	*byte = sc->dma_buffer[0];  in ismt_recvb()
370 	desc->wr_len_cmd = 2;  in ismt_writeb()
371 	sc->dma_buffer[0] = cmd;  in ismt_writeb()
372 	sc->dma_buffer[1] = byte;  in ismt_writeb()
378 ismt_writew(device_t dev, u_char slave, char cmd, short word)  in ismt_writew()
387 	desc->wr_len_cmd = 3;  in ismt_writew()
388 	sc->dma_buffer[0] = cmd;  in ismt_writew()
389 	sc->dma_buffer[1] = word & 0xFF;  in ismt_writew()
390 	sc->dma_buffer[2] = word >> 8;  in ismt_writew()
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()
415 	*byte = sc->dma_buffer[0];  in ismt_readb()
421 ismt_readw(device_t dev, u_char slave, char cmd, short *word)  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()
440 	*word = sc->dma_buffer[0] | (sc->dma_buffer[1] << 8);  in ismt_readw()
446 ismt_pcall(device_t dev, u_char slave, char cmd, short sdata, short *rdata)  in ismt_pcall()
456 	desc->wr_len_cmd = 3;  in ismt_pcall()
457 	desc->rd_len = 2;  in ismt_pcall()
458 	sc->dma_buffer[0] = cmd;  in ismt_pcall()
459 	sc->dma_buffer[1] = sdata & 0xff;  in ismt_pcall()
460 	sc->dma_buffer[2] = sdata >> 8;  in ismt_pcall()
467 	*rdata = sc->dma_buffer[0] | (sc->dma_buffer[1] << 8);  in ismt_pcall()
485 	desc->control = ISMT_DESC_I2C;  in ismt_bwrite()
486 	desc->wr_len_cmd = count + 1;  in ismt_bwrite()
487 	sc->dma_buffer[0] = cmd;  in ismt_bwrite()
488 	memcpy(&sc->dma_buffer[1], buf, count);  in ismt_bwrite()
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()
516 	memcpy(buf, sc->dma_buffer, desc->rxbytes);  in ismt_bread()
517 	*count = desc->rxbytes;  in ismt_bread()
535 	if (sc->intr_handle != NULL) {  in ismt_detach()
536 		bus_teardown_intr(dev, sc->intr_res, sc->intr_handle);  in ismt_detach()
537 		sc->intr_handle = NULL;  in ismt_detach()
539 	if (sc->intr_res != NULL) {  in ismt_detach()
541 		    SYS_RES_IRQ, sc->intr_rid, sc->intr_res);  in ismt_detach()
542 		sc->intr_res = NULL;  in ismt_detach()
544 	if (sc->using_msi == 1)  in ismt_detach()
547 	if (sc->mmio_res != NULL) {  in ismt_detach()
549 		    SYS_RES_MEMORY, sc->mmio_rid, sc->mmio_res);  in ismt_detach()
550 		sc->mmio_res = NULL;  in ismt_detach()
553 	bus_dmamap_unload(sc->desc_dma_tag, sc->desc_dma_map);  in ismt_detach()
554 	bus_dmamap_unload(sc->dma_buffer_dma_tag, sc->dma_buffer_dma_map);  in ismt_detach()
556 	bus_dmamem_free(sc->desc_dma_tag, sc->desc,  in ismt_detach()
557 	    sc->desc_dma_map);  in ismt_detach()
558 	bus_dmamem_free(sc->dma_buffer_dma_tag, sc->dma_buffer,  in ismt_detach()
559 	    sc->dma_buffer_dma_map);  in ismt_detach()
561 	bus_dma_tag_destroy(sc->desc_dma_tag);  in ismt_detach()
562 	bus_dma_tag_destroy(sc->dma_buffer_dma_tag);  in ismt_detach()
586 	sc->pcidev = dev;  in ismt_attach()
589 	if ((sc->smbdev = device_add_child(dev, "smbus",  in ismt_attach()
596 	sc->mmio_rid = PCIR_BAR(0);  in ismt_attach()
597 	sc->mmio_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY,  in ismt_attach()
598 	    &sc->mmio_rid, RF_ACTIVE);  in ismt_attach()
599 	if (sc->mmio_res == NULL) {  in ismt_attach()
605 	sc->mmio_tag = rman_get_bustag(sc->mmio_res);  in ismt_attach()
606 	sc->mmio_handle = rman_get_bushandle(sc->mmio_res);  in ismt_attach()
614 	    0, NULL, NULL, &sc->desc_dma_tag);  in ismt_attach()
619 	    0, NULL, NULL, &sc->dma_buffer_dma_tag);  in ismt_attach()
621 	bus_dmamap_create(sc->desc_dma_tag, 0,  in ismt_attach()
622 	    &sc->desc_dma_map);  in ismt_attach()
623 	bus_dmamap_create(sc->dma_buffer_dma_tag, 0,  in ismt_attach()
624 	    &sc->dma_buffer_dma_map);  in ismt_attach()
626 	bus_dmamem_alloc(sc->desc_dma_tag,  in ismt_attach()
627 	    (void **)&sc->desc, BUS_DMA_WAITOK,  in ismt_attach()
628 	    &sc->desc_dma_map);  in ismt_attach()
629 	bus_dmamem_alloc(sc->dma_buffer_dma_tag,  in ismt_attach()
630 	    (void **)&sc->dma_buffer, BUS_DMA_WAITOK,  in ismt_attach()
631 	    &sc->dma_buffer_dma_map);  in ismt_attach()
633 	bus_dmamap_load(sc->desc_dma_tag,  in ismt_attach()
634 	    sc->desc_dma_map, sc->desc, DESC_SIZE,  in ismt_attach()
635 	    ismt_single_map, &sc->desc_bus_addr, 0);  in ismt_attach()
636 	bus_dmamap_load(sc->dma_buffer_dma_tag,  in ismt_attach()
637 	    sc->dma_buffer_dma_map, sc->dma_buffer, DMA_BUFFER_SIZE,  in ismt_attach()
638 	    ismt_single_map, &sc->dma_buffer_bus_addr, 0);  in ismt_attach()
640 	bus_write_4(sc->mmio_res, ISMT_MSTR_MDBA,  in ismt_attach()
641 	    (sc->desc_bus_addr & 0xFFFFFFFFLL));  in ismt_attach()
642 	bus_write_4(sc->mmio_res, ISMT_MSTR_MDBA + 4,  in ismt_attach()
643 	    (sc->desc_bus_addr >> 32));  in ismt_attach()
646 	bus_write_4(sc->mmio_res, ISMT_MSTR_MCTRL, ISMT_MCTRL_MEIE);  in ismt_attach()
649 	bus_write_4(sc->mmio_res, ISMT_MSTR_MSTS, 0);  in ismt_attach()
651 	/* initialize the Master Descriptor Size (MDS) */  in ismt_attach()
652 	val = bus_read_4(sc->mmio_res, ISMT_MSTR_MDS);  in ismt_attach()
654 	val |= (ISMT_DESC_ENTRIES - 1);  in ismt_attach()
655 	bus_write_4(sc->mmio_res, ISMT_MSTR_MDS, val);  in ismt_attach()
657 	sc->using_msi = 1;  in ismt_attach()
660 		sc->using_msi = 0;  in ismt_attach()
666 		sc->using_msi = 0;  in ismt_attach()
670 	sc->intr_rid = 1;  in ismt_attach()
671 	sc->intr_res = bus_alloc_resource_any(dev, SYS_RES_IRQ,  in ismt_attach()
672 	    &sc->intr_rid, RF_ACTIVE);  in ismt_attach()
674 	if (sc->intr_res == NULL) {  in ismt_attach()
675 		sc->using_msi = 0;  in ismt_attach()
680 	if (sc->using_msi == 0) {  in ismt_attach()
681 		sc->intr_rid = 0;  in ismt_attach()
682 		sc->intr_res = bus_alloc_resource_any(dev, SYS_RES_IRQ,  in ismt_attach()
683 		    &sc->intr_rid, RF_SHAREABLE | RF_ACTIVE);  in ismt_attach()
684 		if (sc->intr_res == NULL) {  in ismt_attach()
691 	ISMT_DEBUG(dev, "using_msi = %d\n", sc->using_msi);  in ismt_attach()
693 	err = bus_setup_intr(dev, sc->intr_res,  in ismt_attach()
695 	    &sc->intr_handle);  in ismt_attach()