123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537538539540541542543544545546547548549550551552553554555556557558559560561562563564565566567568569570571572573574575576577578579580581582583584585586587588589590591592593594595596597598599600601602603604605606607608609610611612613614615616617618619620621622623624625626627628629630631632633634635636637638639640641642643644645646647648649650651652653654655656657658659660661662663664665666667668669670671672673674675676677678679680681682683684685686687688689690691692693694695696697698699700701702703704705706707708709710711712713714715716717718719720721722723724725726727728729730731732733734735736737738739740741742743744745746747748749750751752753754755756757758759760761762763764765766767768769770771772773774775776777778779780781782783784785786787788789790791792793794795796797798799800801802803804805806807808809810811812813814815816817818819820821822823824825826827828829830831832833834835836837838839840841842843844845846847848849850851852853854855856857858859860861862863864865866867868869870871872873874875876877878879880881882883884885886887888889890891892893894895896897898899900901902903904905906907908909910911912913914915916917918919920921922923924925926927928929930931932933934935936937938939940941942943944945946947948949950951952953954955956957958959960961962963964965966967968969970971972973974975976977978979980981982983984985986987988989990991992993994995996997998999100010011002100310041005100610071008100910101011101210131014101510161017101810191020102110221023102410251026102710281029103010311032103310341035103610371038103910401041104210431044104510461047104810491050105110521053105410551056105710581059106010611062106310641065106610671068106910701071107210731074107510761077107810791080108110821083108410851086108710881089109010911092109310941095109610971098109911001101110211031104110511061107110811091110111111121113111411151116111711181119112011211122112311241125112611271128112911301131113211331134113511361137113811391140114111421143114411451146114711481149115011511152115311541155115611571158115911601161116211631164116511661167116811691170117111721173117411751176117711781179118011811182118311841185118611871188118911901191119211931194119511961197119811991200120112021203120412051206120712081209121012111212121312141215121612171218121912201221122212231224122512261227122812291230123112321233123412351236123712381239124012411242124312441245124612471248124912501251125212531254125512561257125812591260126112621263126412651266126712681269127012711272127312741275127612771278127912801281128212831284128512861287128812891290129112921293129412951296129712981299130013011302130313041305130613071308130913101311131213131314131513161317131813191320132113221323132413251326132713281329133013311332133313341335133613371338133913401341134213431344134513461347134813491350135113521353135413551356135713581359136013611362136313641365136613671368136913701371137213731374137513761377137813791380138113821383138413851386138713881389139013911392139313941395139613971398139914001401140214031404140514061407140814091410141114121413141414151416141714181419142014211422142314241425142614271428142914301431143214331434143514361437143814391440144114421443144414451446144714481449145014511452145314541455145614571458145914601461146214631464146514661467146814691470147114721473147414751476147714781479148014811482148314841485148614871488148914901491149214931494149514961497149814991500150115021503150415051506150715081509151015111512151315141515151615171518151915201521152215231524152515261527152815291530153115321533153415351536153715381539154015411542154315441545 |
- /*
- * Driver for (BCM4706)? GBit MAC core on BCMA bus.
- *
- * Copyright (C) 2012 Rafał Miłecki <zajec5@gmail.com>
- *
- * Licensed under the GNU/GPL. See COPYING for details.
- */
- #include "bgmac.h"
- #include <linux/kernel.h>
- #include <linux/module.h>
- #include <linux/delay.h>
- #include <linux/etherdevice.h>
- #include <linux/mii.h>
- #include <linux/phy.h>
- #include <linux/interrupt.h>
- #include <linux/dma-mapping.h>
- #include <bcm47xx_nvram.h>
- static const struct bcma_device_id bgmac_bcma_tbl[] = {
- BCMA_CORE(BCMA_MANUF_BCM, BCMA_CORE_4706_MAC_GBIT, BCMA_ANY_REV, BCMA_ANY_CLASS),
- BCMA_CORE(BCMA_MANUF_BCM, BCMA_CORE_MAC_GBIT, BCMA_ANY_REV, BCMA_ANY_CLASS),
- BCMA_CORETABLE_END
- };
- MODULE_DEVICE_TABLE(bcma, bgmac_bcma_tbl);
- static bool bgmac_wait_value(struct bcma_device *core, u16 reg, u32 mask,
- u32 value, int timeout)
- {
- u32 val;
- int i;
- for (i = 0; i < timeout / 10; i++) {
- val = bcma_read32(core, reg);
- if ((val & mask) == value)
- return true;
- udelay(10);
- }
- pr_err("Timeout waiting for reg 0x%X\n", reg);
- return false;
- }
- /**************************************************
- * DMA
- **************************************************/
- static void bgmac_dma_tx_reset(struct bgmac *bgmac, struct bgmac_dma_ring *ring)
- {
- u32 val;
- int i;
- if (!ring->mmio_base)
- return;
- /* Suspend DMA TX ring first.
- * bgmac_wait_value doesn't support waiting for any of few values, so
- * implement whole loop here.
- */
- bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_TX_CTL,
- BGMAC_DMA_TX_SUSPEND);
- for (i = 0; i < 10000 / 10; i++) {
- val = bgmac_read(bgmac, ring->mmio_base + BGMAC_DMA_TX_STATUS);
- val &= BGMAC_DMA_TX_STAT;
- if (val == BGMAC_DMA_TX_STAT_DISABLED ||
- val == BGMAC_DMA_TX_STAT_IDLEWAIT ||
- val == BGMAC_DMA_TX_STAT_STOPPED) {
- i = 0;
- break;
- }
- udelay(10);
- }
- if (i)
- bgmac_err(bgmac, "Timeout suspending DMA TX ring 0x%X (BGMAC_DMA_TX_STAT: 0x%08X)\n",
- ring->mmio_base, val);
- /* Remove SUSPEND bit */
- bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_TX_CTL, 0);
- if (!bgmac_wait_value(bgmac->core,
- ring->mmio_base + BGMAC_DMA_TX_STATUS,
- BGMAC_DMA_TX_STAT, BGMAC_DMA_TX_STAT_DISABLED,
- 10000)) {
- bgmac_warn(bgmac, "DMA TX ring 0x%X wasn't disabled on time, waiting additional 300us\n",
- ring->mmio_base);
- udelay(300);
- val = bgmac_read(bgmac, ring->mmio_base + BGMAC_DMA_TX_STATUS);
- if ((val & BGMAC_DMA_TX_STAT) != BGMAC_DMA_TX_STAT_DISABLED)
- bgmac_err(bgmac, "Reset of DMA TX ring 0x%X failed\n",
- ring->mmio_base);
- }
- }
- static void bgmac_dma_tx_enable(struct bgmac *bgmac,
- struct bgmac_dma_ring *ring)
- {
- u32 ctl;
- ctl = bgmac_read(bgmac, ring->mmio_base + BGMAC_DMA_TX_CTL);
- ctl |= BGMAC_DMA_TX_ENABLE;
- ctl |= BGMAC_DMA_TX_PARITY_DISABLE;
- bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_TX_CTL, ctl);
- }
- static netdev_tx_t bgmac_dma_tx_add(struct bgmac *bgmac,
- struct bgmac_dma_ring *ring,
- struct sk_buff *skb)
- {
- struct device *dma_dev = bgmac->core->dma_dev;
- struct net_device *net_dev = bgmac->net_dev;
- struct bgmac_dma_desc *dma_desc;
- struct bgmac_slot_info *slot;
- u32 ctl0, ctl1;
- int free_slots;
- if (skb->len > BGMAC_DESC_CTL1_LEN) {
- bgmac_err(bgmac, "Too long skb (%d)\n", skb->len);
- goto err_stop_drop;
- }
- if (ring->start <= ring->end)
- free_slots = ring->start - ring->end + BGMAC_TX_RING_SLOTS;
- else
- free_slots = ring->start - ring->end;
- if (free_slots == 1) {
- bgmac_err(bgmac, "TX ring is full, queue should be stopped!\n");
- netif_stop_queue(net_dev);
- return NETDEV_TX_BUSY;
- }
- slot = &ring->slots[ring->end];
- slot->skb = skb;
- slot->dma_addr = dma_map_single(dma_dev, skb->data, skb->len,
- DMA_TO_DEVICE);
- if (dma_mapping_error(dma_dev, slot->dma_addr)) {
- bgmac_err(bgmac, "Mapping error of skb on ring 0x%X\n",
- ring->mmio_base);
- goto err_stop_drop;
- }
- ctl0 = BGMAC_DESC_CTL0_IOC | BGMAC_DESC_CTL0_SOF | BGMAC_DESC_CTL0_EOF;
- if (ring->end == ring->num_slots - 1)
- ctl0 |= BGMAC_DESC_CTL0_EOT;
- ctl1 = skb->len & BGMAC_DESC_CTL1_LEN;
- dma_desc = ring->cpu_base;
- dma_desc += ring->end;
- dma_desc->addr_low = cpu_to_le32(lower_32_bits(slot->dma_addr));
- dma_desc->addr_high = cpu_to_le32(upper_32_bits(slot->dma_addr));
- dma_desc->ctl0 = cpu_to_le32(ctl0);
- dma_desc->ctl1 = cpu_to_le32(ctl1);
- wmb();
- /* Increase ring->end to point empty slot. We tell hardware the first
- * slot it should *not* read.
- */
- if (++ring->end >= BGMAC_TX_RING_SLOTS)
- ring->end = 0;
- bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_TX_INDEX,
- ring->end * sizeof(struct bgmac_dma_desc));
- /* Always keep one slot free to allow detecting bugged calls. */
- if (--free_slots == 1)
- netif_stop_queue(net_dev);
- return NETDEV_TX_OK;
- err_stop_drop:
- netif_stop_queue(net_dev);
- dev_kfree_skb(skb);
- return NETDEV_TX_OK;
- }
- /* Free transmitted packets */
- static void bgmac_dma_tx_free(struct bgmac *bgmac, struct bgmac_dma_ring *ring)
- {
- struct device *dma_dev = bgmac->core->dma_dev;
- int empty_slot;
- bool freed = false;
- /* The last slot that hardware didn't consume yet */
- empty_slot = bgmac_read(bgmac, ring->mmio_base + BGMAC_DMA_TX_STATUS);
- empty_slot &= BGMAC_DMA_TX_STATDPTR;
- empty_slot /= sizeof(struct bgmac_dma_desc);
- while (ring->start != empty_slot) {
- struct bgmac_slot_info *slot = &ring->slots[ring->start];
- if (slot->skb) {
- /* Unmap no longer used buffer */
- dma_unmap_single(dma_dev, slot->dma_addr,
- slot->skb->len, DMA_TO_DEVICE);
- slot->dma_addr = 0;
- /* Free memory! :) */
- dev_kfree_skb(slot->skb);
- slot->skb = NULL;
- } else {
- bgmac_err(bgmac, "Hardware reported transmission for empty TX ring slot %d! End of ring: %d\n",
- ring->start, ring->end);
- }
- if (++ring->start >= BGMAC_TX_RING_SLOTS)
- ring->start = 0;
- freed = true;
- }
- if (freed && netif_queue_stopped(bgmac->net_dev))
- netif_wake_queue(bgmac->net_dev);
- }
- static void bgmac_dma_rx_reset(struct bgmac *bgmac, struct bgmac_dma_ring *ring)
- {
- if (!ring->mmio_base)
- return;
- bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_RX_CTL, 0);
- if (!bgmac_wait_value(bgmac->core,
- ring->mmio_base + BGMAC_DMA_RX_STATUS,
- BGMAC_DMA_RX_STAT, BGMAC_DMA_RX_STAT_DISABLED,
- 10000))
- bgmac_err(bgmac, "Reset of ring 0x%X RX failed\n",
- ring->mmio_base);
- }
- static void bgmac_dma_rx_enable(struct bgmac *bgmac,
- struct bgmac_dma_ring *ring)
- {
- u32 ctl;
- ctl = bgmac_read(bgmac, ring->mmio_base + BGMAC_DMA_RX_CTL);
- ctl &= BGMAC_DMA_RX_ADDREXT_MASK;
- ctl |= BGMAC_DMA_RX_ENABLE;
- ctl |= BGMAC_DMA_RX_PARITY_DISABLE;
- ctl |= BGMAC_DMA_RX_OVERFLOW_CONT;
- ctl |= BGMAC_RX_FRAME_OFFSET << BGMAC_DMA_RX_FRAME_OFFSET_SHIFT;
- bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_RX_CTL, ctl);
- }
- static int bgmac_dma_rx_skb_for_slot(struct bgmac *bgmac,
- struct bgmac_slot_info *slot)
- {
- struct device *dma_dev = bgmac->core->dma_dev;
- struct bgmac_rx_header *rx;
- /* Alloc skb */
- slot->skb = netdev_alloc_skb(bgmac->net_dev, BGMAC_RX_BUF_SIZE);
- if (!slot->skb)
- return -ENOMEM;
- /* Poison - if everything goes fine, hardware will overwrite it */
- rx = (struct bgmac_rx_header *)slot->skb->data;
- rx->len = cpu_to_le16(0xdead);
- rx->flags = cpu_to_le16(0xbeef);
- /* Map skb for the DMA */
- slot->dma_addr = dma_map_single(dma_dev, slot->skb->data,
- BGMAC_RX_BUF_SIZE, DMA_FROM_DEVICE);
- if (dma_mapping_error(dma_dev, slot->dma_addr)) {
- bgmac_err(bgmac, "DMA mapping error\n");
- return -ENOMEM;
- }
- if (slot->dma_addr & 0xC0000000)
- bgmac_warn(bgmac, "DMA address using 0xC0000000 bit(s), it may need translation trick\n");
- return 0;
- }
- static int bgmac_dma_rx_read(struct bgmac *bgmac, struct bgmac_dma_ring *ring,
- int weight)
- {
- u32 end_slot;
- int handled = 0;
- end_slot = bgmac_read(bgmac, ring->mmio_base + BGMAC_DMA_RX_STATUS);
- end_slot &= BGMAC_DMA_RX_STATDPTR;
- end_slot /= sizeof(struct bgmac_dma_desc);
- ring->end = end_slot;
- while (ring->start != ring->end) {
- struct device *dma_dev = bgmac->core->dma_dev;
- struct bgmac_slot_info *slot = &ring->slots[ring->start];
- struct sk_buff *skb = slot->skb;
- struct sk_buff *new_skb;
- struct bgmac_rx_header *rx;
- u16 len, flags;
- /* Unmap buffer to make it accessible to the CPU */
- dma_sync_single_for_cpu(dma_dev, slot->dma_addr,
- BGMAC_RX_BUF_SIZE, DMA_FROM_DEVICE);
- /* Get info from the header */
- rx = (struct bgmac_rx_header *)skb->data;
- len = le16_to_cpu(rx->len);
- flags = le16_to_cpu(rx->flags);
- /* Check for poison and drop or pass the packet */
- if (len == 0xdead && flags == 0xbeef) {
- bgmac_err(bgmac, "Found poisoned packet at slot %d, DMA issue!\n",
- ring->start);
- } else {
- /* Omit CRC. */
- len -= ETH_FCS_LEN;
- new_skb = netdev_alloc_skb_ip_align(bgmac->net_dev, len);
- if (new_skb) {
- skb_put(new_skb, len);
- skb_copy_from_linear_data_offset(skb, BGMAC_RX_FRAME_OFFSET,
- new_skb->data,
- len);
- skb_checksum_none_assert(skb);
- new_skb->protocol =
- eth_type_trans(new_skb, bgmac->net_dev);
- netif_receive_skb(new_skb);
- handled++;
- } else {
- bgmac->net_dev->stats.rx_dropped++;
- bgmac_err(bgmac, "Allocation of skb for copying packet failed!\n");
- }
- /* Poison the old skb */
- rx->len = cpu_to_le16(0xdead);
- rx->flags = cpu_to_le16(0xbeef);
- }
- /* Make it back accessible to the hardware */
- dma_sync_single_for_device(dma_dev, slot->dma_addr,
- BGMAC_RX_BUF_SIZE, DMA_FROM_DEVICE);
- if (++ring->start >= BGMAC_RX_RING_SLOTS)
- ring->start = 0;
- if (handled >= weight) /* Should never be greater */
- break;
- }
- return handled;
- }
- /* Does ring support unaligned addressing? */
- static bool bgmac_dma_unaligned(struct bgmac *bgmac,
- struct bgmac_dma_ring *ring,
- enum bgmac_dma_ring_type ring_type)
- {
- switch (ring_type) {
- case BGMAC_DMA_RING_TX:
- bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_TX_RINGLO,
- 0xff0);
- if (bgmac_read(bgmac, ring->mmio_base + BGMAC_DMA_TX_RINGLO))
- return true;
- break;
- case BGMAC_DMA_RING_RX:
- bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_RX_RINGLO,
- 0xff0);
- if (bgmac_read(bgmac, ring->mmio_base + BGMAC_DMA_RX_RINGLO))
- return true;
- break;
- }
- return false;
- }
- static void bgmac_dma_ring_free(struct bgmac *bgmac,
- struct bgmac_dma_ring *ring)
- {
- struct device *dma_dev = bgmac->core->dma_dev;
- struct bgmac_slot_info *slot;
- int size;
- int i;
- for (i = 0; i < ring->num_slots; i++) {
- slot = &ring->slots[i];
- if (slot->skb) {
- if (slot->dma_addr)
- dma_unmap_single(dma_dev, slot->dma_addr,
- slot->skb->len, DMA_TO_DEVICE);
- dev_kfree_skb(slot->skb);
- }
- }
- if (ring->cpu_base) {
- /* Free ring of descriptors */
- size = ring->num_slots * sizeof(struct bgmac_dma_desc);
- dma_free_coherent(dma_dev, size, ring->cpu_base,
- ring->dma_base);
- }
- }
- static void bgmac_dma_free(struct bgmac *bgmac)
- {
- int i;
- for (i = 0; i < BGMAC_MAX_TX_RINGS; i++)
- bgmac_dma_ring_free(bgmac, &bgmac->tx_ring[i]);
- for (i = 0; i < BGMAC_MAX_RX_RINGS; i++)
- bgmac_dma_ring_free(bgmac, &bgmac->rx_ring[i]);
- }
- static int bgmac_dma_alloc(struct bgmac *bgmac)
- {
- struct device *dma_dev = bgmac->core->dma_dev;
- struct bgmac_dma_ring *ring;
- static const u16 ring_base[] = { BGMAC_DMA_BASE0, BGMAC_DMA_BASE1,
- BGMAC_DMA_BASE2, BGMAC_DMA_BASE3, };
- int size; /* ring size: different for Tx and Rx */
- int err;
- int i;
- BUILD_BUG_ON(BGMAC_MAX_TX_RINGS > ARRAY_SIZE(ring_base));
- BUILD_BUG_ON(BGMAC_MAX_RX_RINGS > ARRAY_SIZE(ring_base));
- if (!(bcma_aread32(bgmac->core, BCMA_IOST) & BCMA_IOST_DMA64)) {
- bgmac_err(bgmac, "Core does not report 64-bit DMA\n");
- return -ENOTSUPP;
- }
- for (i = 0; i < BGMAC_MAX_TX_RINGS; i++) {
- ring = &bgmac->tx_ring[i];
- ring->num_slots = BGMAC_TX_RING_SLOTS;
- ring->mmio_base = ring_base[i];
- if (bgmac_dma_unaligned(bgmac, ring, BGMAC_DMA_RING_TX))
- bgmac_warn(bgmac, "TX on ring 0x%X supports unaligned addressing but this feature is not implemented\n",
- ring->mmio_base);
- /* Alloc ring of descriptors */
- size = ring->num_slots * sizeof(struct bgmac_dma_desc);
- ring->cpu_base = dma_zalloc_coherent(dma_dev, size,
- &ring->dma_base,
- GFP_KERNEL);
- if (!ring->cpu_base) {
- bgmac_err(bgmac, "Allocation of TX ring 0x%X failed\n",
- ring->mmio_base);
- goto err_dma_free;
- }
- if (ring->dma_base & 0xC0000000)
- bgmac_warn(bgmac, "DMA address using 0xC0000000 bit(s), it may need translation trick\n");
- /* No need to alloc TX slots yet */
- }
- for (i = 0; i < BGMAC_MAX_RX_RINGS; i++) {
- int j;
- ring = &bgmac->rx_ring[i];
- ring->num_slots = BGMAC_RX_RING_SLOTS;
- ring->mmio_base = ring_base[i];
- if (bgmac_dma_unaligned(bgmac, ring, BGMAC_DMA_RING_RX))
- bgmac_warn(bgmac, "RX on ring 0x%X supports unaligned addressing but this feature is not implemented\n",
- ring->mmio_base);
- /* Alloc ring of descriptors */
- size = ring->num_slots * sizeof(struct bgmac_dma_desc);
- ring->cpu_base = dma_zalloc_coherent(dma_dev, size,
- &ring->dma_base,
- GFP_KERNEL);
- if (!ring->cpu_base) {
- bgmac_err(bgmac, "Allocation of RX ring 0x%X failed\n",
- ring->mmio_base);
- err = -ENOMEM;
- goto err_dma_free;
- }
- if (ring->dma_base & 0xC0000000)
- bgmac_warn(bgmac, "DMA address using 0xC0000000 bit(s), it may need translation trick\n");
- /* Alloc RX slots */
- for (j = 0; j < ring->num_slots; j++) {
- err = bgmac_dma_rx_skb_for_slot(bgmac, &ring->slots[j]);
- if (err) {
- bgmac_err(bgmac, "Can't allocate skb for slot in RX ring\n");
- goto err_dma_free;
- }
- }
- }
- return 0;
- err_dma_free:
- bgmac_dma_free(bgmac);
- return -ENOMEM;
- }
- static void bgmac_dma_init(struct bgmac *bgmac)
- {
- struct bgmac_dma_ring *ring;
- struct bgmac_dma_desc *dma_desc;
- u32 ctl0, ctl1;
- int i;
- for (i = 0; i < BGMAC_MAX_TX_RINGS; i++) {
- ring = &bgmac->tx_ring[i];
- /* We don't implement unaligned addressing, so enable first */
- bgmac_dma_tx_enable(bgmac, ring);
- bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_TX_RINGLO,
- lower_32_bits(ring->dma_base));
- bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_TX_RINGHI,
- upper_32_bits(ring->dma_base));
- ring->start = 0;
- ring->end = 0; /* Points the slot that should *not* be read */
- }
- for (i = 0; i < BGMAC_MAX_RX_RINGS; i++) {
- int j;
- ring = &bgmac->rx_ring[i];
- /* We don't implement unaligned addressing, so enable first */
- bgmac_dma_rx_enable(bgmac, ring);
- bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_RX_RINGLO,
- lower_32_bits(ring->dma_base));
- bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_RX_RINGHI,
- upper_32_bits(ring->dma_base));
- for (j = 0, dma_desc = ring->cpu_base; j < ring->num_slots;
- j++, dma_desc++) {
- ctl0 = ctl1 = 0;
- if (j == ring->num_slots - 1)
- ctl0 |= BGMAC_DESC_CTL0_EOT;
- ctl1 |= BGMAC_RX_BUF_SIZE & BGMAC_DESC_CTL1_LEN;
- /* Is there any BGMAC device that requires extension? */
- /* ctl1 |= (addrext << B43_DMA64_DCTL1_ADDREXT_SHIFT) &
- * B43_DMA64_DCTL1_ADDREXT_MASK;
- */
- dma_desc->addr_low = cpu_to_le32(lower_32_bits(ring->slots[j].dma_addr));
- dma_desc->addr_high = cpu_to_le32(upper_32_bits(ring->slots[j].dma_addr));
- dma_desc->ctl0 = cpu_to_le32(ctl0);
- dma_desc->ctl1 = cpu_to_le32(ctl1);
- }
- bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_RX_INDEX,
- ring->num_slots * sizeof(struct bgmac_dma_desc));
- ring->start = 0;
- ring->end = 0;
- }
- }
- /**************************************************
- * PHY ops
- **************************************************/
- static u16 bgmac_phy_read(struct bgmac *bgmac, u8 phyaddr, u8 reg)
- {
- struct bcma_device *core;
- u16 phy_access_addr;
- u16 phy_ctl_addr;
- u32 tmp;
- BUILD_BUG_ON(BGMAC_PA_DATA_MASK != BCMA_GMAC_CMN_PA_DATA_MASK);
- BUILD_BUG_ON(BGMAC_PA_ADDR_MASK != BCMA_GMAC_CMN_PA_ADDR_MASK);
- BUILD_BUG_ON(BGMAC_PA_ADDR_SHIFT != BCMA_GMAC_CMN_PA_ADDR_SHIFT);
- BUILD_BUG_ON(BGMAC_PA_REG_MASK != BCMA_GMAC_CMN_PA_REG_MASK);
- BUILD_BUG_ON(BGMAC_PA_REG_SHIFT != BCMA_GMAC_CMN_PA_REG_SHIFT);
- BUILD_BUG_ON(BGMAC_PA_WRITE != BCMA_GMAC_CMN_PA_WRITE);
- BUILD_BUG_ON(BGMAC_PA_START != BCMA_GMAC_CMN_PA_START);
- BUILD_BUG_ON(BGMAC_PC_EPA_MASK != BCMA_GMAC_CMN_PC_EPA_MASK);
- BUILD_BUG_ON(BGMAC_PC_MCT_MASK != BCMA_GMAC_CMN_PC_MCT_MASK);
- BUILD_BUG_ON(BGMAC_PC_MCT_SHIFT != BCMA_GMAC_CMN_PC_MCT_SHIFT);
- BUILD_BUG_ON(BGMAC_PC_MTE != BCMA_GMAC_CMN_PC_MTE);
- if (bgmac->core->id.id == BCMA_CORE_4706_MAC_GBIT) {
- core = bgmac->core->bus->drv_gmac_cmn.core;
- phy_access_addr = BCMA_GMAC_CMN_PHY_ACCESS;
- phy_ctl_addr = BCMA_GMAC_CMN_PHY_CTL;
- } else {
- core = bgmac->core;
- phy_access_addr = BGMAC_PHY_ACCESS;
- phy_ctl_addr = BGMAC_PHY_CNTL;
- }
- tmp = bcma_read32(core, phy_ctl_addr);
- tmp &= ~BGMAC_PC_EPA_MASK;
- tmp |= phyaddr;
- bcma_write32(core, phy_ctl_addr, tmp);
- tmp = BGMAC_PA_START;
- tmp |= phyaddr << BGMAC_PA_ADDR_SHIFT;
- tmp |= reg << BGMAC_PA_REG_SHIFT;
- bcma_write32(core, phy_access_addr, tmp);
- if (!bgmac_wait_value(core, phy_access_addr, BGMAC_PA_START, 0, 1000)) {
- bgmac_err(bgmac, "Reading PHY %d register 0x%X failed\n",
- phyaddr, reg);
- return 0xffff;
- }
- return bcma_read32(core, phy_access_addr) & BGMAC_PA_DATA_MASK;
- }
- /* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/chipphywr */
- static int bgmac_phy_write(struct bgmac *bgmac, u8 phyaddr, u8 reg, u16 value)
- {
- struct bcma_device *core;
- u16 phy_access_addr;
- u16 phy_ctl_addr;
- u32 tmp;
- if (bgmac->core->id.id == BCMA_CORE_4706_MAC_GBIT) {
- core = bgmac->core->bus->drv_gmac_cmn.core;
- phy_access_addr = BCMA_GMAC_CMN_PHY_ACCESS;
- phy_ctl_addr = BCMA_GMAC_CMN_PHY_CTL;
- } else {
- core = bgmac->core;
- phy_access_addr = BGMAC_PHY_ACCESS;
- phy_ctl_addr = BGMAC_PHY_CNTL;
- }
- tmp = bcma_read32(core, phy_ctl_addr);
- tmp &= ~BGMAC_PC_EPA_MASK;
- tmp |= phyaddr;
- bcma_write32(core, phy_ctl_addr, tmp);
- bgmac_write(bgmac, BGMAC_INT_STATUS, BGMAC_IS_MDIO);
- if (bgmac_read(bgmac, BGMAC_INT_STATUS) & BGMAC_IS_MDIO)
- bgmac_warn(bgmac, "Error setting MDIO int\n");
- tmp = BGMAC_PA_START;
- tmp |= BGMAC_PA_WRITE;
- tmp |= phyaddr << BGMAC_PA_ADDR_SHIFT;
- tmp |= reg << BGMAC_PA_REG_SHIFT;
- tmp |= value;
- bcma_write32(core, phy_access_addr, tmp);
- if (!bgmac_wait_value(core, phy_access_addr, BGMAC_PA_START, 0, 1000)) {
- bgmac_err(bgmac, "Writing to PHY %d register 0x%X failed\n",
- phyaddr, reg);
- return -ETIMEDOUT;
- }
- return 0;
- }
- /* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/chipphyforce */
- static void bgmac_phy_force(struct bgmac *bgmac)
- {
- u16 ctl;
- u16 mask = ~(BGMAC_PHY_CTL_SPEED | BGMAC_PHY_CTL_SPEED_MSB |
- BGMAC_PHY_CTL_ANENAB | BGMAC_PHY_CTL_DUPLEX);
- if (bgmac->phyaddr == BGMAC_PHY_NOREGS)
- return;
- if (bgmac->autoneg)
- return;
- ctl = bgmac_phy_read(bgmac, bgmac->phyaddr, BGMAC_PHY_CTL);
- ctl &= mask;
- if (bgmac->full_duplex)
- ctl |= BGMAC_PHY_CTL_DUPLEX;
- if (bgmac->speed == BGMAC_SPEED_100)
- ctl |= BGMAC_PHY_CTL_SPEED_100;
- else if (bgmac->speed == BGMAC_SPEED_1000)
- ctl |= BGMAC_PHY_CTL_SPEED_1000;
- bgmac_phy_write(bgmac, bgmac->phyaddr, BGMAC_PHY_CTL, ctl);
- }
- /* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/chipphyadvertise */
- static void bgmac_phy_advertise(struct bgmac *bgmac)
- {
- u16 adv;
- if (bgmac->phyaddr == BGMAC_PHY_NOREGS)
- return;
- if (!bgmac->autoneg)
- return;
- /* Adv selected 10/100 speeds */
- adv = bgmac_phy_read(bgmac, bgmac->phyaddr, BGMAC_PHY_ADV);
- adv &= ~(BGMAC_PHY_ADV_10HALF | BGMAC_PHY_ADV_10FULL |
- BGMAC_PHY_ADV_100HALF | BGMAC_PHY_ADV_100FULL);
- if (!bgmac->full_duplex && bgmac->speed & BGMAC_SPEED_10)
- adv |= BGMAC_PHY_ADV_10HALF;
- if (!bgmac->full_duplex && bgmac->speed & BGMAC_SPEED_100)
- adv |= BGMAC_PHY_ADV_100HALF;
- if (bgmac->full_duplex && bgmac->speed & BGMAC_SPEED_10)
- adv |= BGMAC_PHY_ADV_10FULL;
- if (bgmac->full_duplex && bgmac->speed & BGMAC_SPEED_100)
- adv |= BGMAC_PHY_ADV_100FULL;
- bgmac_phy_write(bgmac, bgmac->phyaddr, BGMAC_PHY_ADV, adv);
- /* Adv selected 1000 speeds */
- adv = bgmac_phy_read(bgmac, bgmac->phyaddr, BGMAC_PHY_ADV2);
- adv &= ~(BGMAC_PHY_ADV2_1000HALF | BGMAC_PHY_ADV2_1000FULL);
- if (!bgmac->full_duplex && bgmac->speed & BGMAC_SPEED_1000)
- adv |= BGMAC_PHY_ADV2_1000HALF;
- if (bgmac->full_duplex && bgmac->speed & BGMAC_SPEED_1000)
- adv |= BGMAC_PHY_ADV2_1000FULL;
- bgmac_phy_write(bgmac, bgmac->phyaddr, BGMAC_PHY_ADV2, adv);
- /* Restart */
- bgmac_phy_write(bgmac, bgmac->phyaddr, BGMAC_PHY_CTL,
- bgmac_phy_read(bgmac, bgmac->phyaddr, BGMAC_PHY_CTL) |
- BGMAC_PHY_CTL_RESTART);
- }
- /* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/chipphyinit */
- static void bgmac_phy_init(struct bgmac *bgmac)
- {
- struct bcma_chipinfo *ci = &bgmac->core->bus->chipinfo;
- struct bcma_drv_cc *cc = &bgmac->core->bus->drv_cc;
- u8 i;
- if (ci->id == BCMA_CHIP_ID_BCM5356) {
- for (i = 0; i < 5; i++) {
- bgmac_phy_write(bgmac, i, 0x1f, 0x008b);
- bgmac_phy_write(bgmac, i, 0x15, 0x0100);
- bgmac_phy_write(bgmac, i, 0x1f, 0x000f);
- bgmac_phy_write(bgmac, i, 0x12, 0x2aaa);
- bgmac_phy_write(bgmac, i, 0x1f, 0x000b);
- }
- }
- if ((ci->id == BCMA_CHIP_ID_BCM5357 && ci->pkg != 10) ||
- (ci->id == BCMA_CHIP_ID_BCM4749 && ci->pkg != 10) ||
- (ci->id == BCMA_CHIP_ID_BCM53572 && ci->pkg != 9)) {
- bcma_chipco_chipctl_maskset(cc, 2, ~0xc0000000, 0);
- bcma_chipco_chipctl_maskset(cc, 4, ~0x80000000, 0);
- for (i = 0; i < 5; i++) {
- bgmac_phy_write(bgmac, i, 0x1f, 0x000f);
- bgmac_phy_write(bgmac, i, 0x16, 0x5284);
- bgmac_phy_write(bgmac, i, 0x1f, 0x000b);
- bgmac_phy_write(bgmac, i, 0x17, 0x0010);
- bgmac_phy_write(bgmac, i, 0x1f, 0x000f);
- bgmac_phy_write(bgmac, i, 0x16, 0x5296);
- bgmac_phy_write(bgmac, i, 0x17, 0x1073);
- bgmac_phy_write(bgmac, i, 0x17, 0x9073);
- bgmac_phy_write(bgmac, i, 0x16, 0x52b6);
- bgmac_phy_write(bgmac, i, 0x17, 0x9273);
- bgmac_phy_write(bgmac, i, 0x1f, 0x000b);
- }
- }
- }
- /* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/chipphyreset */
- static void bgmac_phy_reset(struct bgmac *bgmac)
- {
- if (bgmac->phyaddr == BGMAC_PHY_NOREGS)
- return;
- bgmac_phy_write(bgmac, bgmac->phyaddr, BGMAC_PHY_CTL,
- BGMAC_PHY_CTL_RESET);
- udelay(100);
- if (bgmac_phy_read(bgmac, bgmac->phyaddr, BGMAC_PHY_CTL) &
- BGMAC_PHY_CTL_RESET)
- bgmac_err(bgmac, "PHY reset failed\n");
- bgmac_phy_init(bgmac);
- }
- /**************************************************
- * Chip ops
- **************************************************/
- /* TODO: can we just drop @force? Can we don't reset MAC at all if there is
- * nothing to change? Try if after stabilizng driver.
- */
- static void bgmac_cmdcfg_maskset(struct bgmac *bgmac, u32 mask, u32 set,
- bool force)
- {
- u32 cmdcfg = bgmac_read(bgmac, BGMAC_CMDCFG);
- u32 new_val = (cmdcfg & mask) | set;
- bgmac_set(bgmac, BGMAC_CMDCFG, BGMAC_CMDCFG_SR);
- udelay(2);
- if (new_val != cmdcfg || force)
- bgmac_write(bgmac, BGMAC_CMDCFG, new_val);
- bgmac_mask(bgmac, BGMAC_CMDCFG, ~BGMAC_CMDCFG_SR);
- udelay(2);
- }
- static void bgmac_write_mac_address(struct bgmac *bgmac, u8 *addr)
- {
- u32 tmp;
- tmp = (addr[0] << 24) | (addr[1] << 16) | (addr[2] << 8) | addr[3];
- bgmac_write(bgmac, BGMAC_MACADDR_HIGH, tmp);
- tmp = (addr[4] << 8) | addr[5];
- bgmac_write(bgmac, BGMAC_MACADDR_LOW, tmp);
- }
- static void bgmac_set_rx_mode(struct net_device *net_dev)
- {
- struct bgmac *bgmac = netdev_priv(net_dev);
- if (net_dev->flags & IFF_PROMISC)
- bgmac_cmdcfg_maskset(bgmac, ~0, BGMAC_CMDCFG_PROM, true);
- else
- bgmac_cmdcfg_maskset(bgmac, ~BGMAC_CMDCFG_PROM, 0, true);
- }
- #if 0 /* We don't use that regs yet */
- static void bgmac_chip_stats_update(struct bgmac *bgmac)
- {
- int i;
- if (bgmac->core->id.id != BCMA_CORE_4706_MAC_GBIT) {
- for (i = 0; i < BGMAC_NUM_MIB_TX_REGS; i++)
- bgmac->mib_tx_regs[i] =
- bgmac_read(bgmac,
- BGMAC_TX_GOOD_OCTETS + (i * 4));
- for (i = 0; i < BGMAC_NUM_MIB_RX_REGS; i++)
- bgmac->mib_rx_regs[i] =
- bgmac_read(bgmac,
- BGMAC_RX_GOOD_OCTETS + (i * 4));
- }
- /* TODO: what else? how to handle BCM4706? Specs are needed */
- }
- #endif
- static void bgmac_clear_mib(struct bgmac *bgmac)
- {
- int i;
- if (bgmac->core->id.id == BCMA_CORE_4706_MAC_GBIT)
- return;
- bgmac_set(bgmac, BGMAC_DEV_CTL, BGMAC_DC_MROR);
- for (i = 0; i < BGMAC_NUM_MIB_TX_REGS; i++)
- bgmac_read(bgmac, BGMAC_TX_GOOD_OCTETS + (i * 4));
- for (i = 0; i < BGMAC_NUM_MIB_RX_REGS; i++)
- bgmac_read(bgmac, BGMAC_RX_GOOD_OCTETS + (i * 4));
- }
- /* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/gmac_speed */
- static void bgmac_speed(struct bgmac *bgmac, int speed)
- {
- u32 mask = ~(BGMAC_CMDCFG_ES_MASK | BGMAC_CMDCFG_HD);
- u32 set = 0;
- if (speed & BGMAC_SPEED_10)
- set |= BGMAC_CMDCFG_ES_10;
- if (speed & BGMAC_SPEED_100)
- set |= BGMAC_CMDCFG_ES_100;
- if (speed & BGMAC_SPEED_1000)
- set |= BGMAC_CMDCFG_ES_1000;
- if (!bgmac->full_duplex)
- set |= BGMAC_CMDCFG_HD;
- bgmac_cmdcfg_maskset(bgmac, mask, set, true);
- }
- static void bgmac_miiconfig(struct bgmac *bgmac)
- {
- u8 imode = (bgmac_read(bgmac, BGMAC_DEV_STATUS) & BGMAC_DS_MM_MASK) >>
- BGMAC_DS_MM_SHIFT;
- if (imode == 0 || imode == 1) {
- if (bgmac->autoneg)
- bgmac_speed(bgmac, BGMAC_SPEED_100);
- else
- bgmac_speed(bgmac, bgmac->speed);
- }
- }
- /* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/chipreset */
- static void bgmac_chip_reset(struct bgmac *bgmac)
- {
- struct bcma_device *core = bgmac->core;
- struct bcma_bus *bus = core->bus;
- struct bcma_chipinfo *ci = &bus->chipinfo;
- u32 flags = 0;
- u32 iost;
- int i;
- if (bcma_core_is_enabled(core)) {
- if (!bgmac->stats_grabbed) {
- /* bgmac_chip_stats_update(bgmac); */
- bgmac->stats_grabbed = true;
- }
- for (i = 0; i < BGMAC_MAX_TX_RINGS; i++)
- bgmac_dma_tx_reset(bgmac, &bgmac->tx_ring[i]);
- bgmac_cmdcfg_maskset(bgmac, ~0, BGMAC_CMDCFG_ML, false);
- udelay(1);
- for (i = 0; i < BGMAC_MAX_RX_RINGS; i++)
- bgmac_dma_rx_reset(bgmac, &bgmac->rx_ring[i]);
- /* TODO: Clear software multicast filter list */
- }
- iost = bcma_aread32(core, BCMA_IOST);
- if ((ci->id == BCMA_CHIP_ID_BCM5357 && ci->pkg == 10) ||
- (ci->id == BCMA_CHIP_ID_BCM4749 && ci->pkg == 10) ||
- (ci->id == BCMA_CHIP_ID_BCM53572 && ci->pkg == 9))
- iost &= ~BGMAC_BCMA_IOST_ATTACHED;
- if (iost & BGMAC_BCMA_IOST_ATTACHED) {
- flags = BGMAC_BCMA_IOCTL_SW_CLKEN;
- if (!bgmac->has_robosw)
- flags |= BGMAC_BCMA_IOCTL_SW_RESET;
- }
- bcma_core_enable(core, flags);
- if (core->id.rev > 2) {
- bgmac_set(bgmac, BCMA_CLKCTLST, 1 << 8);
- bgmac_wait_value(bgmac->core, BCMA_CLKCTLST, 1 << 24, 1 << 24,
- 1000);
- }
- if (ci->id == BCMA_CHIP_ID_BCM5357 || ci->id == BCMA_CHIP_ID_BCM4749 ||
- ci->id == BCMA_CHIP_ID_BCM53572) {
- struct bcma_drv_cc *cc = &bgmac->core->bus->drv_cc;
- u8 et_swtype = 0;
- u8 sw_type = BGMAC_CHIPCTL_1_SW_TYPE_EPHY |
- BGMAC_CHIPCTL_1_IF_TYPE_RMII;
- char buf[2];
- if (bcm47xx_nvram_getenv("et_swtype", buf, 1) > 0) {
- if (kstrtou8(buf, 0, &et_swtype))
- bgmac_err(bgmac, "Failed to parse et_swtype (%s)\n",
- buf);
- et_swtype &= 0x0f;
- et_swtype <<= 4;
- sw_type = et_swtype;
- } else if (ci->id == BCMA_CHIP_ID_BCM5357 && ci->pkg == 9) {
- sw_type = BGMAC_CHIPCTL_1_SW_TYPE_EPHYRMII;
- } else if ((ci->id != BCMA_CHIP_ID_BCM53572 && ci->pkg == 10) ||
- (ci->id == BCMA_CHIP_ID_BCM53572 && ci->pkg == 9)) {
- sw_type = BGMAC_CHIPCTL_1_IF_TYPE_RGMII |
- BGMAC_CHIPCTL_1_SW_TYPE_RGMII;
- }
- bcma_chipco_chipctl_maskset(cc, 1,
- ~(BGMAC_CHIPCTL_1_IF_TYPE_MASK |
- BGMAC_CHIPCTL_1_SW_TYPE_MASK),
- sw_type);
- }
- if (iost & BGMAC_BCMA_IOST_ATTACHED && !bgmac->has_robosw)
- bcma_awrite32(core, BCMA_IOCTL,
- bcma_aread32(core, BCMA_IOCTL) &
- ~BGMAC_BCMA_IOCTL_SW_RESET);
- /* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/gmac_reset
- * Specs don't say about using BGMAC_CMDCFG_SR, but in this routine
- * BGMAC_CMDCFG is read _after_ putting chip in a reset. So it has to
- * be keps until taking MAC out of the reset.
- */
- bgmac_cmdcfg_maskset(bgmac,
- ~(BGMAC_CMDCFG_TE |
- BGMAC_CMDCFG_RE |
- BGMAC_CMDCFG_RPI |
- BGMAC_CMDCFG_TAI |
- BGMAC_CMDCFG_HD |
- BGMAC_CMDCFG_ML |
- BGMAC_CMDCFG_CFE |
- BGMAC_CMDCFG_RL |
- BGMAC_CMDCFG_RED |
- BGMAC_CMDCFG_PE |
- BGMAC_CMDCFG_TPI |
- BGMAC_CMDCFG_PAD_EN |
- BGMAC_CMDCFG_PF),
- BGMAC_CMDCFG_PROM |
- BGMAC_CMDCFG_NLC |
- BGMAC_CMDCFG_CFE |
- BGMAC_CMDCFG_SR,
- false);
- bgmac_clear_mib(bgmac);
- if (core->id.id == BCMA_CORE_4706_MAC_GBIT)
- bcma_maskset32(bgmac->cmn, BCMA_GMAC_CMN_PHY_CTL, ~0,
- BCMA_GMAC_CMN_PC_MTE);
- else
- bgmac_set(bgmac, BGMAC_PHY_CNTL, BGMAC_PC_MTE);
- bgmac_miiconfig(bgmac);
- bgmac_phy_init(bgmac);
- bgmac->int_status = 0;
- }
- static void bgmac_chip_intrs_on(struct bgmac *bgmac)
- {
- bgmac_write(bgmac, BGMAC_INT_MASK, bgmac->int_mask);
- }
- static void bgmac_chip_intrs_off(struct bgmac *bgmac)
- {
- bgmac_write(bgmac, BGMAC_INT_MASK, 0);
- bgmac_read(bgmac, BGMAC_INT_MASK);
- }
- /* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/gmac_enable */
- static void bgmac_enable(struct bgmac *bgmac)
- {
- struct bcma_chipinfo *ci = &bgmac->core->bus->chipinfo;
- u32 cmdcfg;
- u32 mode;
- u32 rxq_ctl;
- u32 fl_ctl;
- u16 bp_clk;
- u8 mdp;
- cmdcfg = bgmac_read(bgmac, BGMAC_CMDCFG);
- bgmac_cmdcfg_maskset(bgmac, ~(BGMAC_CMDCFG_TE | BGMAC_CMDCFG_RE),
- BGMAC_CMDCFG_SR, true);
- udelay(2);
- cmdcfg |= BGMAC_CMDCFG_TE | BGMAC_CMDCFG_RE;
- bgmac_write(bgmac, BGMAC_CMDCFG, cmdcfg);
- mode = (bgmac_read(bgmac, BGMAC_DEV_STATUS) & BGMAC_DS_MM_MASK) >>
- BGMAC_DS_MM_SHIFT;
- if (ci->id != BCMA_CHIP_ID_BCM47162 || mode != 0)
- bgmac_set(bgmac, BCMA_CLKCTLST, BCMA_CLKCTLST_FORCEHT);
- if (ci->id == BCMA_CHIP_ID_BCM47162 && mode == 2)
- bcma_chipco_chipctl_maskset(&bgmac->core->bus->drv_cc, 1, ~0,
- BGMAC_CHIPCTL_1_RXC_DLL_BYPASS);
- switch (ci->id) {
- case BCMA_CHIP_ID_BCM5357:
- case BCMA_CHIP_ID_BCM4749:
- case BCMA_CHIP_ID_BCM53572:
- case BCMA_CHIP_ID_BCM4716:
- case BCMA_CHIP_ID_BCM47162:
- fl_ctl = 0x03cb04cb;
- if (ci->id == BCMA_CHIP_ID_BCM5357 ||
- ci->id == BCMA_CHIP_ID_BCM4749 ||
- ci->id == BCMA_CHIP_ID_BCM53572)
- fl_ctl = 0x2300e1;
- bgmac_write(bgmac, BGMAC_FLOW_CTL_THRESH, fl_ctl);
- bgmac_write(bgmac, BGMAC_PAUSE_CTL, 0x27fff);
- break;
- }
- rxq_ctl = bgmac_read(bgmac, BGMAC_RXQ_CTL);
- rxq_ctl &= ~BGMAC_RXQ_CTL_MDP_MASK;
- bp_clk = bcma_pmu_get_bus_clock(&bgmac->core->bus->drv_cc) / 1000000;
- mdp = (bp_clk * 128 / 1000) - 3;
- rxq_ctl |= (mdp << BGMAC_RXQ_CTL_MDP_SHIFT);
- bgmac_write(bgmac, BGMAC_RXQ_CTL, rxq_ctl);
- }
- /* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/chipinit */
- static void bgmac_chip_init(struct bgmac *bgmac, bool full_init)
- {
- struct bgmac_dma_ring *ring;
- int i;
- /* 1 interrupt per received frame */
- bgmac_write(bgmac, BGMAC_INT_RECV_LAZY, 1 << BGMAC_IRL_FC_SHIFT);
- /* Enable 802.3x tx flow control (honor received PAUSE frames) */
- bgmac_cmdcfg_maskset(bgmac, ~BGMAC_CMDCFG_RPI, 0, true);
- bgmac_set_rx_mode(bgmac->net_dev);
- bgmac_write_mac_address(bgmac, bgmac->net_dev->dev_addr);
- if (bgmac->loopback)
- bgmac_cmdcfg_maskset(bgmac, ~0, BGMAC_CMDCFG_ML, false);
- else
- bgmac_cmdcfg_maskset(bgmac, ~BGMAC_CMDCFG_ML, 0, false);
- bgmac_write(bgmac, BGMAC_RXMAX_LENGTH, 32 + ETHER_MAX_LEN);
- if (!bgmac->autoneg) {
- bgmac_speed(bgmac, bgmac->speed);
- bgmac_phy_force(bgmac);
- } else if (bgmac->speed) { /* if there is anything to adv */
- bgmac_phy_advertise(bgmac);
- }
- if (full_init) {
- bgmac_dma_init(bgmac);
- if (1) /* FIXME: is there any case we don't want IRQs? */
- bgmac_chip_intrs_on(bgmac);
- } else {
- for (i = 0; i < BGMAC_MAX_RX_RINGS; i++) {
- ring = &bgmac->rx_ring[i];
- bgmac_dma_rx_enable(bgmac, ring);
- }
- }
- bgmac_enable(bgmac);
- }
- static irqreturn_t bgmac_interrupt(int irq, void *dev_id)
- {
- struct bgmac *bgmac = netdev_priv(dev_id);
- u32 int_status = bgmac_read(bgmac, BGMAC_INT_STATUS);
- int_status &= bgmac->int_mask;
- if (!int_status)
- return IRQ_NONE;
- /* Ack */
- bgmac_write(bgmac, BGMAC_INT_STATUS, int_status);
- /* Disable new interrupts until handling existing ones */
- bgmac_chip_intrs_off(bgmac);
- bgmac->int_status = int_status;
- napi_schedule(&bgmac->napi);
- return IRQ_HANDLED;
- }
- static int bgmac_poll(struct napi_struct *napi, int weight)
- {
- struct bgmac *bgmac = container_of(napi, struct bgmac, napi);
- struct bgmac_dma_ring *ring;
- int handled = 0;
- if (bgmac->int_status & BGMAC_IS_TX0) {
- ring = &bgmac->tx_ring[0];
- bgmac_dma_tx_free(bgmac, ring);
- bgmac->int_status &= ~BGMAC_IS_TX0;
- }
- if (bgmac->int_status & BGMAC_IS_RX) {
- ring = &bgmac->rx_ring[0];
- handled += bgmac_dma_rx_read(bgmac, ring, weight);
- bgmac->int_status &= ~BGMAC_IS_RX;
- }
- if (bgmac->int_status) {
- bgmac_err(bgmac, "Unknown IRQs: 0x%08X\n", bgmac->int_status);
- bgmac->int_status = 0;
- }
- if (handled < weight)
- napi_complete(napi);
- bgmac_chip_intrs_on(bgmac);
- return handled;
- }
- /**************************************************
- * net_device_ops
- **************************************************/
- static int bgmac_open(struct net_device *net_dev)
- {
- struct bgmac *bgmac = netdev_priv(net_dev);
- int err = 0;
- bgmac_chip_reset(bgmac);
- /* Specs say about reclaiming rings here, but we do that in DMA init */
- bgmac_chip_init(bgmac, true);
- err = request_irq(bgmac->core->irq, bgmac_interrupt, IRQF_SHARED,
- KBUILD_MODNAME, net_dev);
- if (err < 0) {
- bgmac_err(bgmac, "IRQ request error: %d!\n", err);
- goto err_out;
- }
- napi_enable(&bgmac->napi);
- netif_carrier_on(net_dev);
- err_out:
- return err;
- }
- static int bgmac_stop(struct net_device *net_dev)
- {
- struct bgmac *bgmac = netdev_priv(net_dev);
- netif_carrier_off(net_dev);
- napi_disable(&bgmac->napi);
- bgmac_chip_intrs_off(bgmac);
- free_irq(bgmac->core->irq, net_dev);
- bgmac_chip_reset(bgmac);
- return 0;
- }
- static netdev_tx_t bgmac_start_xmit(struct sk_buff *skb,
- struct net_device *net_dev)
- {
- struct bgmac *bgmac = netdev_priv(net_dev);
- struct bgmac_dma_ring *ring;
- /* No QOS support yet */
- ring = &bgmac->tx_ring[0];
- return bgmac_dma_tx_add(bgmac, ring, skb);
- }
- static int bgmac_set_mac_address(struct net_device *net_dev, void *addr)
- {
- struct bgmac *bgmac = netdev_priv(net_dev);
- int ret;
- ret = eth_prepare_mac_addr_change(net_dev, addr);
- if (ret < 0)
- return ret;
- bgmac_write_mac_address(bgmac, (u8 *)addr);
- eth_commit_mac_addr_change(net_dev, addr);
- return 0;
- }
- static int bgmac_ioctl(struct net_device *net_dev, struct ifreq *ifr, int cmd)
- {
- struct bgmac *bgmac = netdev_priv(net_dev);
- struct mii_ioctl_data *data = if_mii(ifr);
- switch (cmd) {
- case SIOCGMIIPHY:
- data->phy_id = bgmac->phyaddr;
- /* fallthru */
- case SIOCGMIIREG:
- if (!netif_running(net_dev))
- return -EAGAIN;
- data->val_out = bgmac_phy_read(bgmac, data->phy_id,
- data->reg_num & 0x1f);
- return 0;
- case SIOCSMIIREG:
- if (!netif_running(net_dev))
- return -EAGAIN;
- bgmac_phy_write(bgmac, data->phy_id, data->reg_num & 0x1f,
- data->val_in);
- return 0;
- default:
- return -EOPNOTSUPP;
- }
- }
- static const struct net_device_ops bgmac_netdev_ops = {
- .ndo_open = bgmac_open,
- .ndo_stop = bgmac_stop,
- .ndo_start_xmit = bgmac_start_xmit,
- .ndo_set_rx_mode = bgmac_set_rx_mode,
- .ndo_set_mac_address = bgmac_set_mac_address,
- .ndo_validate_addr = eth_validate_addr,
- .ndo_do_ioctl = bgmac_ioctl,
- };
- /**************************************************
- * ethtool_ops
- **************************************************/
- static int bgmac_get_settings(struct net_device *net_dev,
- struct ethtool_cmd *cmd)
- {
- struct bgmac *bgmac = netdev_priv(net_dev);
- cmd->supported = SUPPORTED_10baseT_Half |
- SUPPORTED_10baseT_Full |
- SUPPORTED_100baseT_Half |
- SUPPORTED_100baseT_Full |
- SUPPORTED_1000baseT_Half |
- SUPPORTED_1000baseT_Full |
- SUPPORTED_Autoneg;
- if (bgmac->autoneg) {
- WARN_ON(cmd->advertising);
- if (bgmac->full_duplex) {
- if (bgmac->speed & BGMAC_SPEED_10)
- cmd->advertising |= ADVERTISED_10baseT_Full;
- if (bgmac->speed & BGMAC_SPEED_100)
- cmd->advertising |= ADVERTISED_100baseT_Full;
- if (bgmac->speed & BGMAC_SPEED_1000)
- cmd->advertising |= ADVERTISED_1000baseT_Full;
- } else {
- if (bgmac->speed & BGMAC_SPEED_10)
- cmd->advertising |= ADVERTISED_10baseT_Half;
- if (bgmac->speed & BGMAC_SPEED_100)
- cmd->advertising |= ADVERTISED_100baseT_Half;
- if (bgmac->speed & BGMAC_SPEED_1000)
- cmd->advertising |= ADVERTISED_1000baseT_Half;
- }
- } else {
- switch (bgmac->speed) {
- case BGMAC_SPEED_10:
- ethtool_cmd_speed_set(cmd, SPEED_10);
- break;
- case BGMAC_SPEED_100:
- ethtool_cmd_speed_set(cmd, SPEED_100);
- break;
- case BGMAC_SPEED_1000:
- ethtool_cmd_speed_set(cmd, SPEED_1000);
- break;
- }
- }
- cmd->duplex = bgmac->full_duplex ? DUPLEX_FULL : DUPLEX_HALF;
- cmd->autoneg = bgmac->autoneg;
- return 0;
- }
- #if 0
- static int bgmac_set_settings(struct net_device *net_dev,
- struct ethtool_cmd *cmd)
- {
- struct bgmac *bgmac = netdev_priv(net_dev);
- return -1;
- }
- #endif
- static void bgmac_get_drvinfo(struct net_device *net_dev,
- struct ethtool_drvinfo *info)
- {
- strlcpy(info->driver, KBUILD_MODNAME, sizeof(info->driver));
- strlcpy(info->bus_info, "BCMA", sizeof(info->bus_info));
- }
- static const struct ethtool_ops bgmac_ethtool_ops = {
- .get_settings = bgmac_get_settings,
- .get_drvinfo = bgmac_get_drvinfo,
- };
- /**************************************************
- * MII
- **************************************************/
- static int bgmac_mii_read(struct mii_bus *bus, int mii_id, int regnum)
- {
- return bgmac_phy_read(bus->priv, mii_id, regnum);
- }
- static int bgmac_mii_write(struct mii_bus *bus, int mii_id, int regnum,
- u16 value)
- {
- return bgmac_phy_write(bus->priv, mii_id, regnum, value);
- }
- static int bgmac_mii_register(struct bgmac *bgmac)
- {
- struct mii_bus *mii_bus;
- int i, err = 0;
- mii_bus = mdiobus_alloc();
- if (!mii_bus)
- return -ENOMEM;
- mii_bus->name = "bgmac mii bus";
- sprintf(mii_bus->id, "%s-%d-%d", "bgmac", bgmac->core->bus->num,
- bgmac->core->core_unit);
- mii_bus->priv = bgmac;
- mii_bus->read = bgmac_mii_read;
- mii_bus->write = bgmac_mii_write;
- mii_bus->parent = &bgmac->core->dev;
- mii_bus->phy_mask = ~(1 << bgmac->phyaddr);
- mii_bus->irq = kmalloc_array(PHY_MAX_ADDR, sizeof(int), GFP_KERNEL);
- if (!mii_bus->irq) {
- err = -ENOMEM;
- goto err_free_bus;
- }
- for (i = 0; i < PHY_MAX_ADDR; i++)
- mii_bus->irq[i] = PHY_POLL;
- err = mdiobus_register(mii_bus);
- if (err) {
- bgmac_err(bgmac, "Registration of mii bus failed\n");
- goto err_free_irq;
- }
- bgmac->mii_bus = mii_bus;
- return err;
- err_free_irq:
- kfree(mii_bus->irq);
- err_free_bus:
- mdiobus_free(mii_bus);
- return err;
- }
- static void bgmac_mii_unregister(struct bgmac *bgmac)
- {
- struct mii_bus *mii_bus = bgmac->mii_bus;
- mdiobus_unregister(mii_bus);
- kfree(mii_bus->irq);
- mdiobus_free(mii_bus);
- }
- /**************************************************
- * BCMA bus ops
- **************************************************/
- /* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/chipattach */
- static int bgmac_probe(struct bcma_device *core)
- {
- struct net_device *net_dev;
- struct bgmac *bgmac;
- struct ssb_sprom *sprom = &core->bus->sprom;
- u8 *mac = core->core_unit ? sprom->et1mac : sprom->et0mac;
- int err;
- /* We don't support 2nd, 3rd, ... units, SPROM has to be adjusted */
- if (core->core_unit > 1) {
- pr_err("Unsupported core_unit %d\n", core->core_unit);
- return -ENOTSUPP;
- }
- if (!is_valid_ether_addr(mac)) {
- dev_err(&core->dev, "Invalid MAC addr: %pM\n", mac);
- eth_random_addr(mac);
- dev_warn(&core->dev, "Using random MAC: %pM\n", mac);
- }
- /* Allocation and references */
- net_dev = alloc_etherdev(sizeof(*bgmac));
- if (!net_dev)
- return -ENOMEM;
- net_dev->netdev_ops = &bgmac_netdev_ops;
- net_dev->irq = core->irq;
- SET_ETHTOOL_OPS(net_dev, &bgmac_ethtool_ops);
- bgmac = netdev_priv(net_dev);
- bgmac->net_dev = net_dev;
- bgmac->core = core;
- bcma_set_drvdata(core, bgmac);
- /* Defaults */
- bgmac->autoneg = true;
- bgmac->full_duplex = true;
- bgmac->speed = BGMAC_SPEED_10 | BGMAC_SPEED_100 | BGMAC_SPEED_1000;
- memcpy(bgmac->net_dev->dev_addr, mac, ETH_ALEN);
- /* On BCM4706 we need common core to access PHY */
- if (core->id.id == BCMA_CORE_4706_MAC_GBIT &&
- !core->bus->drv_gmac_cmn.core) {
- bgmac_err(bgmac, "GMAC CMN core not found (required for BCM4706)\n");
- err = -ENODEV;
- goto err_netdev_free;
- }
- bgmac->cmn = core->bus->drv_gmac_cmn.core;
- bgmac->phyaddr = core->core_unit ? sprom->et1phyaddr :
- sprom->et0phyaddr;
- bgmac->phyaddr &= BGMAC_PHY_MASK;
- if (bgmac->phyaddr == BGMAC_PHY_MASK) {
- bgmac_err(bgmac, "No PHY found\n");
- err = -ENODEV;
- goto err_netdev_free;
- }
- bgmac_info(bgmac, "Found PHY addr: %d%s\n", bgmac->phyaddr,
- bgmac->phyaddr == BGMAC_PHY_NOREGS ? " (NOREGS)" : "");
- if (core->bus->hosttype == BCMA_HOSTTYPE_PCI) {
- bgmac_err(bgmac, "PCI setup not implemented\n");
- err = -ENOTSUPP;
- goto err_netdev_free;
- }
- bgmac_chip_reset(bgmac);
- err = bgmac_dma_alloc(bgmac);
- if (err) {
- bgmac_err(bgmac, "Unable to alloc memory for DMA\n");
- goto err_netdev_free;
- }
- bgmac->int_mask = BGMAC_IS_ERRMASK | BGMAC_IS_RX | BGMAC_IS_TX_MASK;
- if (bcm47xx_nvram_getenv("et0_no_txint", NULL, 0) == 0)
- bgmac->int_mask &= ~BGMAC_IS_TX_MASK;
- /* TODO: reset the external phy. Specs are needed */
- bgmac_phy_reset(bgmac);
- bgmac->has_robosw = !!(core->bus->sprom.boardflags_lo &
- BGMAC_BFL_ENETROBO);
- if (bgmac->has_robosw)
- bgmac_warn(bgmac, "Support for Roboswitch not implemented\n");
- if (core->bus->sprom.boardflags_lo & BGMAC_BFL_ENETADM)
- bgmac_warn(bgmac, "Support for ADMtek ethernet switch not implemented\n");
- err = bgmac_mii_register(bgmac);
- if (err) {
- bgmac_err(bgmac, "Cannot register MDIO\n");
- err = -ENOTSUPP;
- goto err_dma_free;
- }
- err = register_netdev(bgmac->net_dev);
- if (err) {
- bgmac_err(bgmac, "Cannot register net device\n");
- err = -ENOTSUPP;
- goto err_mii_unregister;
- }
- netif_carrier_off(net_dev);
- netif_napi_add(net_dev, &bgmac->napi, bgmac_poll, BGMAC_WEIGHT);
- return 0;
- err_mii_unregister:
- bgmac_mii_unregister(bgmac);
- err_dma_free:
- bgmac_dma_free(bgmac);
- err_netdev_free:
- bcma_set_drvdata(core, NULL);
- free_netdev(net_dev);
- return err;
- }
- static void bgmac_remove(struct bcma_device *core)
- {
- struct bgmac *bgmac = bcma_get_drvdata(core);
- netif_napi_del(&bgmac->napi);
- unregister_netdev(bgmac->net_dev);
- bgmac_mii_unregister(bgmac);
- bgmac_dma_free(bgmac);
- bcma_set_drvdata(core, NULL);
- free_netdev(bgmac->net_dev);
- }
- static struct bcma_driver bgmac_bcma_driver = {
- .name = KBUILD_MODNAME,
- .id_table = bgmac_bcma_tbl,
- .probe = bgmac_probe,
- .remove = bgmac_remove,
- };
- static int __init bgmac_init(void)
- {
- int err;
- err = bcma_driver_register(&bgmac_bcma_driver);
- if (err)
- return err;
- pr_info("Broadcom 47xx GBit MAC driver loaded\n");
- return 0;
- }
- static void __exit bgmac_exit(void)
- {
- bcma_driver_unregister(&bgmac_bcma_driver);
- }
- module_init(bgmac_init)
- module_exit(bgmac_exit)
- MODULE_AUTHOR("Rafał Miłecki");
- MODULE_LICENSE("GPL");
|