1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause
29 /* A10/A20 EMAC driver */
136     bus_space_read_4(sc->emac_tag, sc->emac_handle, reg)
138     bus_space_write_4(sc->emac_tag, sc->emac_handle, reg, val)
146 	error = clk_get_by_ofw_index(sc->emac_dev, 0, 0, &sc->emac_clk);  in emac_sys_setup()
148 		device_printf(sc->emac_dev, "cannot get clock\n");  in emac_sys_setup()
151 	error = clk_enable(sc->emac_clk);  in emac_sys_setup()
153 		device_printf(sc->emac_dev, "cannot enable clock\n");  in emac_sys_setup()
172 	 * If there is something non-zero there just use it.  in emac_get_hwaddr()
175 	 * using the SID rootkey.  in emac_get_hwaddr()
179 	 * 'bsd' + random 24 low-order bits. 'b' is 0x62, which has the locally  in emac_get_hwaddr()
236 	ifp = sc->emac_ifp;  in emac_set_rx_mode()
294 	ifp = sc->emac_ifp;  in emac_txeof()
296 	sc->emac_fifo_mask &= ~status;  in emac_txeof()
304 	sc->emac_watchdog_timer = 0;  in emac_txeof()
317 	ifp = sc->emac_ifp;  in emac_rxeof()
319 	    (if_getdrvflags(ifp) & IFF_DRV_RUNNING) != 0; count--) {  in emac_rxeof()
346 			for (i = 100; i > 0; i--) {  in emac_rxeof()
353 				device_printf(sc->emac_dev,  in emac_rxeof()
396 		m->m_len = m->m_pkthdr.len = MCLBYTES;  in emac_rxeof()
399 		bus_space_read_multi_4(sc->emac_tag, sc->emac_handle,  in emac_rxeof()
402 		m->m_pkthdr.rcvif = ifp;  in emac_rxeof()
403 		m->m_len = m->m_pkthdr.len = len - ETHER_CRC_LEN;  in emac_rxeof()
412 		if (m->m_len <= (MHLEN - ETHER_HDR_LEN)) {  in emac_rxeof()
413 			bcopy(m->m_data, m->m_data + ETHER_HDR_LEN, m->m_len);  in emac_rxeof()
414 			m->m_data += ETHER_HDR_LEN;  in emac_rxeof()
415 		} else if (m->m_len <= (MCLBYTES - ETHER_HDR_LEN) &&  in emac_rxeof()
416 		    m->m_len > (MHLEN - ETHER_HDR_LEN)) {  in emac_rxeof()
419 				len = ETHER_HDR_LEN + m->m_pkthdr.l2hlen;  in emac_rxeof()
420 				bcopy(m->m_data, m0->m_data, len);  in emac_rxeof()
421 				m->m_data += len;  in emac_rxeof()
422 				m->m_len -= len;  in emac_rxeof()
423 				m0->m_len = len;  in emac_rxeof()
425 				m0->m_next = m;  in emac_rxeof()
433 		} else if (m->m_len > EMAC_MAC_MAXF) {  in emac_rxeof()
453 	if (sc->emac_watchdog_timer == 0 || --sc->emac_watchdog_timer)  in emac_watchdog()
456 	ifp = sc->emac_ifp;  in emac_watchdog()
458 	if (sc->emac_link == 0) {  in emac_watchdog()
460 			if_printf(sc->emac_ifp, "watchdog timeout "  in emac_watchdog()
463 		if_printf(sc->emac_ifp, "watchdog timeout -- resetting\n");  in emac_watchdog()
479 	mii = device_get_softc(sc->emac_miibus);  in emac_tick()
483 	callout_reset(&sc->emac_tick_ch, hz, emac_tick, sc);  in emac_tick()
507 	ifp = sc->emac_ifp;  in emac_init_locked()
590 	sc->emac_link = 0;  in emac_init_locked()
593 	mii = device_get_softc(sc->emac_miibus);  in emac_init_locked()
596 	callout_reset(&sc->emac_tick_ch, hz, emac_tick, sc);  in emac_init_locked()
620 	if (sc->emac_fifo_mask == (EMAC_TX_FIFO0 | EMAC_TX_FIFO1))  in emac_start_locked()
622 	if (sc->emac_link == 0)  in emac_start_locked()
629 	if (sc->emac_fifo_mask & EMAC_TX_FIFO0)  in emac_start_locked()
633 	sc->emac_fifo_mask |= (1 << fifo);  in emac_start_locked()
634 	if (sc->emac_fifo_mask == (EMAC_TX_FIFO0 | EMAC_TX_FIFO1))  in emac_start_locked()
642 	if (m->m_next != NULL || (mtod(m, uintptr_t) & 3) != 0) {  in emac_start_locked()
652 	bus_space_write_multi_4(sc->emac_tag, sc->emac_handle,  in emac_start_locked()
654 	    roundup2(m->m_len, 4) / 4);  in emac_start_locked()
658 	EMAC_WRITE_REG(sc, reg, m->m_len);  in emac_start_locked()
665 	sc->emac_watchdog_timer = 5;  in emac_start_locked()
680 	ifp = sc->emac_ifp;  in emac_stop_locked()
682 	sc->emac_link = 0;  in emac_stop_locked()
694 	callout_stop(&sc->emac_tick_ch);  in emac_stop_locked()
716 		emac_rxeof(sc, sc->emac_rx_process_limit);  in emac_intr()
721 		ifp = sc->emac_ifp;  in emac_intr()
726 	/* Re-enable interrupt mask */  in emac_intr()
749 				if ((if_getflags(ifp) ^ sc->emac_if_flags) &  in emac_ioctl()
758 		sc->emac_if_flags = if_getflags(ifp);  in emac_ioctl()
771 		mii = device_get_softc(sc->emac_miibus);  in emac_ioctl()
772 		error = ifmedia_ioctl(ifp, ifr, &mii->mii_media, command);  in emac_ioctl()
788 	if (!ofw_bus_is_compatible(dev, "allwinner,sun4i-a10-emac"))  in emac_probe()
791 	device_set_desc(dev, "A10/A20 EMAC ethernet controller");  in emac_probe()
801 	if_setdrvflagbits(sc->emac_ifp, 0, IFF_DRV_RUNNING);  in emac_detach()
803 		ether_ifdetach(sc->emac_ifp);  in emac_detach()
807 		callout_drain(&sc->emac_tick_ch);  in emac_detach()
810 	if (sc->emac_intrhand != NULL)  in emac_detach()
811 		bus_teardown_intr(sc->emac_dev, sc->emac_irq,  in emac_detach()
812 		    sc->emac_intrhand);  in emac_detach()
814 	if (sc->emac_miibus != NULL) {  in emac_detach()
815 		device_delete_child(sc->emac_dev, sc->emac_miibus);  in emac_detach()
816 		bus_generic_detach(sc->emac_dev);  in emac_detach()
819 	if (sc->emac_clk != NULL)  in emac_detach()
820 		clk_disable(sc->emac_clk);  in emac_detach()
822 	if (sc->emac_res != NULL)  in emac_detach()
823 		bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->emac_res);  in emac_detach()
825 	if (sc->emac_irq != NULL)  in emac_detach()
826 		bus_release_resource(dev, SYS_RES_IRQ, 0, sc->emac_irq);  in emac_detach()
828 	if (sc->emac_ifp != NULL)  in emac_detach()
829 		if_free(sc->emac_ifp);  in emac_detach()
831 	if (mtx_initialized(&sc->emac_mtx))  in emac_detach()
832 		mtx_destroy(&sc->emac_mtx);  in emac_detach()
853 	ifp = sc->emac_ifp;  in emac_suspend()
870 	ifp = sc->emac_ifp;  in emac_resume()
889 	sc->emac_dev = dev;  in emac_attach()
892 	mtx_init(&sc->emac_mtx, device_get_nameunit(dev), MTX_NETWORK_LOCK,  in emac_attach()
894 	callout_init_mtx(&sc->emac_tick_ch, &sc->emac_mtx, 0);  in emac_attach()
897 	sc->emac_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,  in emac_attach()
899 	if (sc->emac_res == NULL) {  in emac_attach()
905 	sc->emac_tag = rman_get_bustag(sc->emac_res);  in emac_attach()
906 	sc->emac_handle = rman_get_bushandle(sc->emac_res);  in emac_attach()
909 	sc->emac_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,  in emac_attach()
911 	if (sc->emac_irq == NULL) {  in emac_attach()
921 	    &sc->emac_rx_process_limit, 0, sysctl_hw_emac_proc_limit, "I",  in emac_attach()
924 	sc->emac_rx_process_limit = EMAC_PROC_DEFAULT;  in emac_attach()
926 	    "process_limit", &sc->emac_rx_process_limit);  in emac_attach()
928 		if (sc->emac_rx_process_limit < EMAC_PROC_MIN ||  in emac_attach()
929 		    sc->emac_rx_process_limit > EMAC_PROC_MAX) {  in emac_attach()
932 			sc->emac_rx_process_limit = EMAC_PROC_DEFAULT;  in emac_attach()
942 	ifp = sc->emac_ifp = if_alloc(IFT_ETHER);  in emac_attach()
946 	error = mii_attach(dev, &sc->emac_miibus, ifp, emac_ifmedia_upd,  in emac_attach()
967 	/* Tell the upper layer we support VLAN over-sized frames. */  in emac_attach()
970 	error = bus_setup_intr(dev, sc->emac_irq, INTR_TYPE_NET | INTR_MPSAFE,  in emac_attach()
971 	    NULL, emac_intr, sc, &sc->emac_intrhand);  in emac_attach()
989 	for (timeout = 100; timeout != 0; --timeout) {  in emac_miibus_iowait()
1058 	mii = device_get_softc(sc->emac_miibus);  in emac_miibus_statchg()
1059 	ifp = sc->emac_ifp;  in emac_miibus_statchg()
1064 	sc->emac_link = 0;  in emac_miibus_statchg()
1065 	if ((mii->mii_media_status & (IFM_ACTIVE | IFM_AVALID)) ==  in emac_miibus_statchg()
1067 		switch (IFM_SUBTYPE(mii->mii_media_active)) {  in emac_miibus_statchg()
1070 			sc->emac_link = 1;  in emac_miibus_statchg()
1077 	if (sc->emac_link != 0) {  in emac_miibus_statchg()
1079 		if ((IFM_OPTIONS(mii->mii_media_active) & IFM_FDX) != 0) {  in emac_miibus_statchg()
1108 	mii = device_get_softc(sc->emac_miibus);  in emac_ifmedia_upd()
1110 	LIST_FOREACH(miisc, &mii->mii_phys, mii_list)  in emac_ifmedia_upd()
1125 	mii = device_get_softc(sc->emac_miibus);  in emac_ifmedia_sts()
1129 	ifmr->ifm_active = mii->mii_media_active;  in emac_ifmedia_sts()
1130 	ifmr->ifm_status = mii->mii_media_status;  in emac_ifmedia_sts()
1175 	if (error || req->newptr == NULL)  in sysctl_int_range()