Lines Matching +full:sync +full:- +full:read
21 * kernel-based SPI device; it is essentially an Ethernet-to-SPI
57 MODULE_PARM_DESC(qcaspi_clkspeed, "SPI bus clock speed (Hz). Use 1000000-16000000.");
63 MODULE_PARM_DESC(qcaspi_burst_len, "Number of data bytes per burst. Use 1-5000.");
75 MODULE_PARM_DESC(wr_verify, "SPI register write verify trails. Use 0-3.");
87 netdev_dbg(qca->net_dev, "interrupts: 0x%04x\n", *intr_cause); in start_spi_intr_handling()
100 netdev_dbg(qca->net_dev, "acking int: 0x%04x\n", intr_cause); in end_spi_intr_handling()
122 ret = spi_sync(qca->spi_dev, &msg); in qcaspi_write_burst()
146 ret = spi_sync(qca->spi_dev, &msg); in qcaspi_write_legacy()
175 ret = spi_sync(qca->spi_dev, &msg); in qcaspi_read_burst()
199 ret = spi_sync(qca->spi_dev, &msg); in qcaspi_read_legacy()
226 ret = spi_sync(qca->spi_dev, &msg); in qcaspi_tx_cmd()
245 len = skb->len; in qcaspi_tx_frame()
248 if (qca->legacy_mode) in qcaspi_tx_frame()
254 if (count > qca->burst_len) in qcaspi_tx_frame()
255 count = qca->burst_len; in qcaspi_tx_frame()
257 if (qca->legacy_mode) { in qcaspi_tx_frame()
259 skb->data + offset, in qcaspi_tx_frame()
263 skb->data + offset, in qcaspi_tx_frame()
268 return -1; in qcaspi_tx_frame()
271 len -= count; in qcaspi_tx_frame()
280 struct net_device_stats *n_stats = &qca->net_dev->stats; in qcaspi_transmit()
286 if (qca->txr.skb[qca->txr.head] == NULL) in qcaspi_transmit()
295 qca->stats.buf_avail_err++; in qcaspi_transmit()
296 return -1; in qcaspi_transmit()
299 while (qca->txr.skb[qca->txr.head]) { in qcaspi_transmit()
300 pkt_len = qca->txr.skb[qca->txr.head]->len + QCASPI_HW_PKT_LEN; in qcaspi_transmit()
304 qca->stats.write_buf_miss++; in qcaspi_transmit()
308 if (qcaspi_tx_frame(qca, qca->txr.skb[qca->txr.head]) == -1) { in qcaspi_transmit()
309 qca->stats.write_err++; in qcaspi_transmit()
310 return -1; in qcaspi_transmit()
314 n_stats->tx_packets++; in qcaspi_transmit()
315 n_stats->tx_bytes += qca->txr.skb[qca->txr.head]->len; in qcaspi_transmit()
316 available -= pkt_len; in qcaspi_transmit()
322 netif_tx_lock_bh(qca->net_dev); in qcaspi_transmit()
323 dev_kfree_skb(qca->txr.skb[qca->txr.head]); in qcaspi_transmit()
324 qca->txr.skb[qca->txr.head] = NULL; in qcaspi_transmit()
325 qca->txr.size -= pkt_len; in qcaspi_transmit()
326 new_head = qca->txr.head + 1; in qcaspi_transmit()
327 if (new_head >= qca->txr.count) in qcaspi_transmit()
329 qca->txr.head = new_head; in qcaspi_transmit()
330 if (netif_queue_stopped(qca->net_dev)) in qcaspi_transmit()
331 netif_wake_queue(qca->net_dev); in qcaspi_transmit()
332 netif_tx_unlock_bh(qca->net_dev); in qcaspi_transmit()
341 struct net_device *net_dev = qca->net_dev; in qcaspi_receive()
342 struct net_device_stats *n_stats = &net_dev->stats; in qcaspi_receive()
348 if (!qca->rx_skb) { in qcaspi_receive()
349 qca->rx_skb = netdev_alloc_skb_ip_align(net_dev, in qcaspi_receive()
350 net_dev->mtu + in qcaspi_receive()
352 if (!qca->rx_skb) { in qcaspi_receive()
354 qca->stats.out_of_mem++; in qcaspi_receive()
355 return -1; in qcaspi_receive()
359 /* Read the packet size. */ in qcaspi_receive()
369 qca->stats.buf_avail_err++; in qcaspi_receive()
370 return -1; in qcaspi_receive()
373 return -1; in qcaspi_receive()
378 if (qca->legacy_mode) in qcaspi_receive()
384 if (count > qca->burst_len) in qcaspi_receive()
385 count = qca->burst_len; in qcaspi_receive()
387 if (qca->legacy_mode) { in qcaspi_receive()
388 bytes_read = qcaspi_read_legacy(qca, qca->rx_buffer, in qcaspi_receive()
391 bytes_read = qcaspi_read_burst(qca, qca->rx_buffer, in qcaspi_receive()
395 netdev_dbg(net_dev, "available: %d, byte read: %d\n", in qcaspi_receive()
399 available -= bytes_read; in qcaspi_receive()
401 qca->stats.read_err++; in qcaspi_receive()
402 return -1; in qcaspi_receive()
405 cp = qca->rx_buffer; in qcaspi_receive()
407 while ((bytes_read--) && (qca->rx_skb)) { in qcaspi_receive()
410 retcode = qcafrm_fsm_decode(&qca->frm_handle, in qcaspi_receive()
411 qca->rx_skb->data, in qcaspi_receive()
412 skb_tailroom(qca->rx_skb), in qcaspi_receive()
421 n_stats->rx_errors++; in qcaspi_receive()
422 n_stats->rx_dropped++; in qcaspi_receive()
426 n_stats->rx_errors++; in qcaspi_receive()
427 n_stats->rx_dropped++; in qcaspi_receive()
430 qca->rx_skb->dev = qca->net_dev; in qcaspi_receive()
431 n_stats->rx_packets++; in qcaspi_receive()
432 n_stats->rx_bytes += retcode; in qcaspi_receive()
433 skb_put(qca->rx_skb, retcode); in qcaspi_receive()
434 qca->rx_skb->protocol = eth_type_trans( in qcaspi_receive()
435 qca->rx_skb, qca->rx_skb->dev); in qcaspi_receive()
436 skb_checksum_none_assert(qca->rx_skb); in qcaspi_receive()
437 netif_rx(qca->rx_skb); in qcaspi_receive()
438 qca->rx_skb = netdev_alloc_skb_ip_align(net_dev, in qcaspi_receive()
439 net_dev->mtu + VLAN_ETH_HLEN); in qcaspi_receive()
440 if (!qca->rx_skb) { in qcaspi_receive()
442 n_stats->rx_errors++; in qcaspi_receive()
443 qca->stats.out_of_mem++; in qcaspi_receive()
460 if (txr->skb[txr->tail]) in qcaspi_tx_ring_has_space()
463 return (txr->size + QCAFRM_MAX_LEN < QCASPI_HW_BUF_LEN) ? 1 : 0; in qcaspi_tx_ring_has_space()
478 netif_tx_lock_bh(qca->net_dev); in qcaspi_flush_tx_ring()
480 if (qca->txr.skb[i]) { in qcaspi_flush_tx_ring()
481 dev_kfree_skb(qca->txr.skb[i]); in qcaspi_flush_tx_ring()
482 qca->txr.skb[i] = NULL; in qcaspi_flush_tx_ring()
483 qca->net_dev->stats.tx_dropped++; in qcaspi_flush_tx_ring()
486 qca->txr.tail = 0; in qcaspi_flush_tx_ring()
487 qca->txr.head = 0; in qcaspi_flush_tx_ring()
488 qca->txr.size = 0; in qcaspi_flush_tx_ring()
489 netif_tx_unlock_bh(qca->net_dev); in qcaspi_flush_tx_ring()
500 /* Read signature twice, if not valid in qcaspi_qca7k_sync()
506 if (qca->sync == QCASPI_SYNC_READY) in qcaspi_qca7k_sync()
507 qca->stats.bad_signature++; in qcaspi_qca7k_sync()
509 qca->sync = QCASPI_SYNC_UNKNOWN; in qcaspi_qca7k_sync()
510 netdev_dbg(qca->net_dev, "sync: got CPU on, but signature was invalid, restart\n"); in qcaspi_qca7k_sync()
517 netdev_dbg(qca->net_dev, "sync: got CPU on, but wrbuf not empty. reset!\n"); in qcaspi_qca7k_sync()
518 qca->sync = QCASPI_SYNC_UNKNOWN; in qcaspi_qca7k_sync()
520 netdev_dbg(qca->net_dev, "sync: got CPU on, now in sync\n"); in qcaspi_qca7k_sync()
521 qca->sync = QCASPI_SYNC_READY; in qcaspi_qca7k_sync()
527 switch (qca->sync) { in qcaspi_qca7k_sync()
535 qca->sync = QCASPI_SYNC_UNKNOWN; in qcaspi_qca7k_sync()
536 qca->stats.bad_signature++; in qcaspi_qca7k_sync()
537 netdev_dbg(qca->net_dev, "sync: bad signature, restart\n"); in qcaspi_qca7k_sync()
543 /* Read signature, if not valid stay in unknown state */ in qcaspi_qca7k_sync()
546 netdev_dbg(qca->net_dev, "sync: could not read signature to reset device, retry.\n"); in qcaspi_qca7k_sync()
551 netdev_dbg(qca->net_dev, "sync: resetting device.\n"); in qcaspi_qca7k_sync()
556 qca->sync = QCASPI_SYNC_RESET; in qcaspi_qca7k_sync()
557 qca->stats.trig_reset++; in qcaspi_qca7k_sync()
558 qca->reset_count = 0; in qcaspi_qca7k_sync()
561 qca->reset_count++; in qcaspi_qca7k_sync()
562 netdev_dbg(qca->net_dev, "sync: waiting for CPU on, count %u.\n", in qcaspi_qca7k_sync()
563 qca->reset_count); in qcaspi_qca7k_sync()
564 if (qca->reset_count >= QCASPI_RESET_TIMEOUT) { in qcaspi_qca7k_sync()
566 qca->sync = QCASPI_SYNC_UNKNOWN; in qcaspi_qca7k_sync()
567 qca->stats.reset_timeout++; in qcaspi_qca7k_sync()
568 netdev_dbg(qca->net_dev, "sync: reset timeout, restarting process.\n"); in qcaspi_qca7k_sync()
580 netdev_info(qca->net_dev, "SPI thread created\n"); in qcaspi_spi_thread()
584 netif_tx_disable(qca->net_dev); in qcaspi_spi_thread()
585 netif_carrier_off(qca->net_dev); in qcaspi_spi_thread()
588 if (qca->sync == QCASPI_SYNC_READY) { in qcaspi_spi_thread()
589 netif_carrier_on(qca->net_dev); in qcaspi_spi_thread()
590 netif_wake_queue(qca->net_dev); in qcaspi_spi_thread()
595 if ((qca->intr_req == qca->intr_svc) && in qcaspi_spi_thread()
596 !qca->txr.skb[qca->txr.head]) in qcaspi_spi_thread()
601 netdev_dbg(qca->net_dev, "have work to do. int: %d, tx_skb: %p\n", in qcaspi_spi_thread()
602 qca->intr_req - qca->intr_svc, in qcaspi_spi_thread()
603 qca->txr.skb[qca->txr.head]); in qcaspi_spi_thread()
607 if (qca->sync != QCASPI_SYNC_READY) { in qcaspi_spi_thread()
608 netdev_dbg(qca->net_dev, "sync: not ready %u, turn off carrier and flush\n", in qcaspi_spi_thread()
609 (unsigned int)qca->sync); in qcaspi_spi_thread()
610 netif_stop_queue(qca->net_dev); in qcaspi_spi_thread()
611 netif_carrier_off(qca->net_dev); in qcaspi_spi_thread()
616 if (qca->intr_svc != qca->intr_req) { in qcaspi_spi_thread()
617 qca->intr_svc = qca->intr_req; in qcaspi_spi_thread()
624 if (qca->frm_handle.state != qca->frm_handle.init) in qcaspi_spi_thread()
625 qca->net_dev->stats.rx_dropped++; in qcaspi_spi_thread()
627 qcafrm_fsm_init_spi(&qca->frm_handle); in qcaspi_spi_thread()
628 qca->stats.device_reset++; in qcaspi_spi_thread()
631 if (qca->sync != QCASPI_SYNC_READY) in qcaspi_spi_thread()
634 netif_wake_queue(qca->net_dev); in qcaspi_spi_thread()
635 netif_carrier_on(qca->net_dev); in qcaspi_spi_thread()
639 /* restart sync */ in qcaspi_spi_thread()
640 netdev_dbg(qca->net_dev, "===> rdbuf error!\n"); in qcaspi_spi_thread()
641 qca->stats.read_buf_err++; in qcaspi_spi_thread()
642 qca->sync = QCASPI_SYNC_UNKNOWN; in qcaspi_spi_thread()
647 /* restart sync */ in qcaspi_spi_thread()
648 netdev_dbg(qca->net_dev, "===> wrbuf error!\n"); in qcaspi_spi_thread()
649 qca->stats.write_buf_err++; in qcaspi_spi_thread()
650 qca->sync = QCASPI_SYNC_UNKNOWN; in qcaspi_spi_thread()
655 * if sync has occurred in qcaspi_spi_thread()
657 if (qca->sync == QCASPI_SYNC_READY) { in qcaspi_spi_thread()
665 if (qca->sync == QCASPI_SYNC_READY) in qcaspi_spi_thread()
669 netdev_info(qca->net_dev, "SPI thread exit\n"); in qcaspi_spi_thread()
679 qca->intr_req++; in qcaspi_intr_handler()
680 if (qca->spi_thread) in qcaspi_intr_handler()
681 wake_up_process(qca->spi_thread); in qcaspi_intr_handler()
693 return -EINVAL; in qcaspi_netdev_open()
695 qca->intr_req = 1; in qcaspi_netdev_open()
696 qca->intr_svc = 0; in qcaspi_netdev_open()
697 qca->sync = QCASPI_SYNC_UNKNOWN; in qcaspi_netdev_open()
698 qcafrm_fsm_init_spi(&qca->frm_handle); in qcaspi_netdev_open()
700 qca->spi_thread = kthread_run((void *)qcaspi_spi_thread, in qcaspi_netdev_open()
701 qca, "%s", dev->name); in qcaspi_netdev_open()
703 if (IS_ERR(qca->spi_thread)) { in qcaspi_netdev_open()
706 return PTR_ERR(qca->spi_thread); in qcaspi_netdev_open()
709 ret = request_irq(qca->spi_dev->irq, qcaspi_intr_handler, 0, in qcaspi_netdev_open()
710 dev->name, qca); in qcaspi_netdev_open()
713 QCASPI_DRV_NAME, qca->spi_dev->irq, ret); in qcaspi_netdev_open()
714 kthread_stop(qca->spi_thread); in qcaspi_netdev_open()
731 free_irq(qca->spi_dev->irq, qca); in qcaspi_netdev_close()
733 kthread_stop(qca->spi_thread); in qcaspi_netdev_close()
734 qca->spi_thread = NULL; in qcaspi_netdev_close()
750 if (skb->len < QCAFRM_MIN_LEN) in qcaspi_netdev_xmit()
751 pad_len = QCAFRM_MIN_LEN - skb->len; in qcaspi_netdev_xmit()
753 if (qca->txr.skb[qca->txr.tail]) { in qcaspi_netdev_xmit()
754 netdev_warn(qca->net_dev, "queue was unexpectedly full!\n"); in qcaspi_netdev_xmit()
755 netif_stop_queue(qca->net_dev); in qcaspi_netdev_xmit()
756 qca->stats.ring_full++; in qcaspi_netdev_xmit()
765 qca->stats.out_of_mem++; in qcaspi_netdev_xmit()
772 frame_len = skb->len + pad_len; in qcaspi_netdev_xmit()
784 netdev_dbg(qca->net_dev, "Tx-ing packet: Size: 0x%08x\n", in qcaspi_netdev_xmit()
785 skb->len); in qcaspi_netdev_xmit()
787 qca->txr.size += skb->len + QCASPI_HW_PKT_LEN; in qcaspi_netdev_xmit()
789 new_tail = qca->txr.tail + 1; in qcaspi_netdev_xmit()
790 if (new_tail >= qca->txr.count) in qcaspi_netdev_xmit()
793 qca->txr.skb[qca->txr.tail] = skb; in qcaspi_netdev_xmit()
794 qca->txr.tail = new_tail; in qcaspi_netdev_xmit()
796 if (!qcaspi_tx_ring_has_space(&qca->txr)) { in qcaspi_netdev_xmit()
797 netif_stop_queue(qca->net_dev); in qcaspi_netdev_xmit()
798 qca->stats.ring_full++; in qcaspi_netdev_xmit()
803 if (qca->spi_thread) in qcaspi_netdev_xmit()
804 wake_up_process(qca->spi_thread); in qcaspi_netdev_xmit()
814 netdev_info(qca->net_dev, "Transmit timeout at %ld, latency %ld\n", in qcaspi_netdev_tx_timeout()
815 jiffies, jiffies - dev_trans_start(dev)); in qcaspi_netdev_tx_timeout()
816 qca->net_dev->stats.tx_errors++; in qcaspi_netdev_tx_timeout()
818 qca->sync = QCASPI_SYNC_UNKNOWN; in qcaspi_netdev_tx_timeout()
820 if (qca->spi_thread) in qcaspi_netdev_tx_timeout()
821 wake_up_process(qca->spi_thread); in qcaspi_netdev_tx_timeout()
829 dev->mtu = QCAFRM_MAX_MTU; in qcaspi_netdev_init()
830 dev->type = ARPHRD_ETHER; in qcaspi_netdev_init()
831 qca->clkspeed = qcaspi_clkspeed; in qcaspi_netdev_init()
832 qca->burst_len = qcaspi_burst_len; in qcaspi_netdev_init()
833 qca->spi_thread = NULL; in qcaspi_netdev_init()
834 qca->buffer_size = (dev->mtu + VLAN_ETH_HLEN + QCAFRM_HEADER_LEN + in qcaspi_netdev_init()
837 memset(&qca->stats, 0, sizeof(struct qcaspi_stats)); in qcaspi_netdev_init()
839 qca->rx_buffer = kmalloc(qca->buffer_size, GFP_KERNEL); in qcaspi_netdev_init()
840 if (!qca->rx_buffer) in qcaspi_netdev_init()
841 return -ENOBUFS; in qcaspi_netdev_init()
843 qca->rx_skb = netdev_alloc_skb_ip_align(dev, qca->net_dev->mtu + in qcaspi_netdev_init()
845 if (!qca->rx_skb) { in qcaspi_netdev_init()
846 kfree(qca->rx_buffer); in qcaspi_netdev_init()
847 netdev_info(qca->net_dev, "Failed to allocate RX sk_buff.\n"); in qcaspi_netdev_init()
848 return -ENOBUFS; in qcaspi_netdev_init()
859 kfree(qca->rx_buffer); in qcaspi_netdev_uninit()
860 qca->buffer_size = 0; in qcaspi_netdev_uninit()
861 dev_kfree_skb(qca->rx_skb); in qcaspi_netdev_uninit()
880 dev->netdev_ops = &qcaspi_netdev_ops; in qcaspi_netdev_setup()
882 dev->watchdog_timeo = QCASPI_TX_TIMEOUT; in qcaspi_netdev_setup()
883 dev->priv_flags &= ~IFF_TX_SKB_SHARING; in qcaspi_netdev_setup()
884 dev->tx_queue_len = 100; in qcaspi_netdev_setup()
886 /* MTU range: 46 - 1500 */ in qcaspi_netdev_setup()
887 dev->min_mtu = QCAFRM_MIN_MTU; in qcaspi_netdev_setup()
888 dev->max_mtu = QCAFRM_MAX_MTU; in qcaspi_netdev_setup()
893 memset(&qca->txr, 0, sizeof(qca->txr)); in qcaspi_netdev_setup()
894 qca->txr.count = TX_RING_MAX_LEN; in qcaspi_netdev_setup()
912 if (!spi->dev.of_node) { in qca_spi_probe()
913 dev_err(&spi->dev, "Missing device tree\n"); in qca_spi_probe()
914 return -EINVAL; in qca_spi_probe()
917 legacy_mode = of_property_read_bool(spi->dev.of_node, in qca_spi_probe()
918 "qca,legacy-mode"); in qca_spi_probe()
921 if (spi->max_speed_hz) in qca_spi_probe()
922 qcaspi_clkspeed = spi->max_speed_hz; in qca_spi_probe()
929 dev_err(&spi->dev, "Invalid clkspeed: %d\n", in qca_spi_probe()
931 return -EINVAL; in qca_spi_probe()
936 dev_err(&spi->dev, "Invalid burst len: %d\n", in qca_spi_probe()
938 return -EINVAL; in qca_spi_probe()
943 dev_err(&spi->dev, "Invalid pluggable: %d\n", in qca_spi_probe()
945 return -EINVAL; in qca_spi_probe()
950 dev_err(&spi->dev, "Invalid write verify: %d\n", in qca_spi_probe()
952 return -EINVAL; in qca_spi_probe()
955 dev_info(&spi->dev, "ver=%s, clkspeed=%d, burst_len=%d, pluggable=%d\n", in qca_spi_probe()
961 spi->mode = SPI_MODE_3; in qca_spi_probe()
962 spi->max_speed_hz = qcaspi_clkspeed; in qca_spi_probe()
964 dev_err(&spi->dev, "Unable to setup SPI device\n"); in qca_spi_probe()
965 return -EFAULT; in qca_spi_probe()
970 return -ENOMEM; in qca_spi_probe()
973 SET_NETDEV_DEV(qcaspi_devs, &spi->dev); in qca_spi_probe()
978 dev_err(&spi->dev, "Fail to retrieve private structure\n"); in qca_spi_probe()
979 return -ENOMEM; in qca_spi_probe()
981 qca->net_dev = qcaspi_devs; in qca_spi_probe()
982 qca->spi_dev = spi; in qca_spi_probe()
983 qca->legacy_mode = legacy_mode; in qca_spi_probe()
987 ret = of_get_ethdev_address(spi->dev.of_node, qca->net_dev); in qca_spi_probe()
989 eth_hw_addr_random(qca->net_dev); in qca_spi_probe()
990 dev_info(&spi->dev, "Using random MAC address: %pM\n", in qca_spi_probe()
991 qca->net_dev->dev_addr); in qca_spi_probe()
994 netif_carrier_off(qca->net_dev); in qca_spi_probe()
1001 dev_err(&spi->dev, "Invalid signature (0x%04X)\n", in qca_spi_probe()
1004 return -EFAULT; in qca_spi_probe()
1009 dev_err(&spi->dev, "Unable to register net device %s\n", in qca_spi_probe()
1010 qcaspi_devs->name); in qca_spi_probe()
1012 return -EFAULT; in qca_spi_probe()