diff options
Diffstat (limited to 'drivers/dma')
| -rw-r--r-- | drivers/dma/edma.c | 486 |
1 files changed, 340 insertions, 146 deletions
diff --git a/drivers/dma/edma.c b/drivers/dma/edma.c index d4d71e60da1b..31722d436a42 100644 --- a/drivers/dma/edma.c +++ b/drivers/dma/edma.c @@ -201,13 +201,20 @@ struct edma_desc { struct edma_cc; +struct edma_tc { + struct device_node *node; + u16 id; +}; + struct edma_chan { struct virt_dma_chan vchan; struct list_head node; struct edma_desc *edesc; struct edma_cc *ecc; + struct edma_tc *tc; int ch_num; bool alloced; + bool hw_triggered; int slot[EDMA_MAX_SLOTS]; int missed; struct dma_slave_config cfg; @@ -218,6 +225,7 @@ struct edma_cc { struct edma_soc_info *info; void __iomem *base; int id; + bool legacy_mode; /* eDMA3 resource information */ unsigned num_channels; @@ -228,20 +236,16 @@ struct edma_cc { bool chmap_exist; enum dma_event_q default_queue; - bool unused_chan_list_done; - /* The slot_inuse bit for each PaRAM slot is clear unless the - * channel is in use ... by ARM or DSP, for QDMA, or whatever. + /* + * The slot_inuse bit for each PaRAM slot is clear unless the slot is + * in use by Linux or if it is allocated to be used by DSP. */ unsigned long *slot_inuse; - /* The channel_unused bit for each channel is clear unless - * it is not being used on this platform. It uses a bit - * of SOC-specific initialization code. - */ - unsigned long *channel_unused; - struct dma_device dma_slave; + struct dma_device *dma_memcpy; struct edma_chan *slave_chans; + struct edma_tc *tc_list; int dummy_slot; }; @@ -251,8 +255,17 @@ static const struct edmacc_param dummy_paramset = { .ccnt = 1, }; +#define EDMA_BINDING_LEGACY 0 +#define EDMA_BINDING_TPCC 1 static const struct of_device_id edma_of_ids[] = { - { .compatible = "ti,edma3", }, + { + .compatible = "ti,edma3", + .data = (void *)EDMA_BINDING_LEGACY, + }, + { + .compatible = "ti,edma3-tpcc", + .data = (void *)EDMA_BINDING_TPCC, + }, {} }; @@ -412,60 +425,6 @@ static void edma_set_chmap(struct edma_chan *echan, int slot) } } -static int prepare_unused_channel_list(struct device *dev, void *data) -{ - struct platform_device *pdev = to_platform_device(dev); - struct edma_cc *ecc = data; - int dma_req_min = EDMA_CTLR_CHAN(ecc->id, 0); - int dma_req_max = dma_req_min + ecc->num_channels; - int i, count; - struct of_phandle_args dma_spec; - - if (dev->of_node) { - struct platform_device *dma_pdev; - - count = of_property_count_strings(dev->of_node, "dma-names"); - if (count < 0) - return 0; - for (i = 0; i < count; i++) { - if (of_parse_phandle_with_args(dev->of_node, "dmas", - "#dma-cells", i, - &dma_spec)) - continue; - - if (!of_match_node(edma_of_ids, dma_spec.np)) { - of_node_put(dma_spec.np); - continue; - } - - dma_pdev = of_find_device_by_node(dma_spec.np); - if (&dma_pdev->dev != ecc->dev) - continue; - - clear_bit(EDMA_CHAN_SLOT(dma_spec.args[0]), - ecc->channel_unused); - of_node_put(dma_spec.np); - } - return 0; - } - - /* For non-OF case */ - for (i = 0; i < pdev->num_resources; i++) { - struct resource *res = &pdev->resource[i]; - int dma_req; - - if (!(res->flags & IORESOURCE_DMA)) - continue; - - dma_req = (int)res->start; - if (dma_req >= dma_req_min && dma_req < dma_req_max) - clear_bit(EDMA_CHAN_SLOT(pdev->resource[i].start), - ecc->channel_unused); - } - - return 0; -} - static void edma_setup_interrupt(struct edma_chan *echan, bool enable) { struct edma_cc *ecc = echan->ecc; @@ -617,7 +576,7 @@ static void edma_start(struct edma_chan *echan) int j = (channel >> 5); unsigned int mask = BIT(channel & 0x1f); - if (test_bit(channel, ecc->channel_unused)) { + if (!echan->hw_triggered) { /* EDMA channels without event association */ dev_dbg(ecc->dev, "ESR%d %08x\n", j, edma_shadow0_read_array(ecc, SH_ESR, j)); @@ -734,20 +693,6 @@ static int edma_alloc_channel(struct edma_chan *echan, struct edma_cc *ecc = echan->ecc; int channel = EDMA_CHAN_SLOT(echan->ch_num); - if (!ecc->unused_chan_list_done) { - /* - * Scan all the platform devices to find out the EDMA channels - * used and clear them in the unused list, making the rest - * available for ARM usage. - */ - int ret = bus_for_each_dev(&platform_bus_type, NULL, ecc, - prepare_unused_channel_list); - if (ret < 0) - return ret; - - ecc->unused_chan_list_done = true; - } - /* ensure access through shadow region 0 */ edma_or_array2(ecc, EDMA_DRAE, 0, channel >> 5, BIT(channel & 0x1f)); @@ -899,7 +844,7 @@ static int edma_terminate_all(struct dma_chan *chan) if (echan->edesc) { edma_stop(echan); /* Move the cyclic channel back to default queue */ - if (echan->edesc->cyclic) + if (!echan->tc && echan->edesc->cyclic) edma_assign_channel_eventq(echan, EVENTQ_DEFAULT); /* * free the running request descriptor @@ -1403,7 +1348,8 @@ static struct dma_async_tx_descriptor *edma_prep_dma_cyclic( } /* Place the cyclic channel to highest priority queue */ - edma_assign_channel_eventq(echan, EVENTQ_0); + if (!echan->tc) + edma_assign_channel_eventq(echan, EVENTQ_0); return vchan_tx_prep(&echan->vchan, &edesc->vdesc, tx_flags); } @@ -1609,18 +1555,54 @@ static irqreturn_t dma_ccerr_handler(int irq, void *data) return IRQ_HANDLED; } +static void edma_tc_set_pm_state(struct edma_tc *tc, bool enable) +{ + struct platform_device *tc_pdev; + int ret; + + if (!tc) + return; + + tc_pdev = of_find_device_by_node(tc->node); + if (!tc_pdev) { + pr_err("%s: TPTC device is not found\n", __func__); + return; + } + if (!pm_runtime_enabled(&tc_pdev->dev)) + pm_runtime_enable(&tc_pdev->dev); + + if (enable) + ret = pm_runtime_get_sync(&tc_pdev->dev); + else + ret = pm_runtime_put_sync(&tc_pdev->dev); + + if (ret < 0) + pr_err("%s: pm_runtime_%s_sync() failed for %s\n", __func__, + enable ? "get" : "put", dev_name(&tc_pdev->dev)); +} + /* Alloc channel resources */ static int edma_alloc_chan_resources(struct dma_chan *chan) { struct edma_chan *echan = to_edma_chan(chan); - struct device *dev = chan->device->dev; + struct edma_cc *ecc = echan->ecc; + struct device *dev = ecc->dev; + enum dma_event_q eventq_no = EVENTQ_DEFAULT; int ret; - ret = edma_alloc_channel(echan, EVENTQ_DEFAULT); + if (echan->tc) { + eventq_no = echan->tc->id; + } else if (ecc->tc_list) { + /* memcpy channel */ + echan->tc = &ecc->tc_list[ecc->info->default_queue]; + eventq_no = echan->tc->id; + } + + ret = edma_alloc_channel(echan, eventq_no); if (ret) return ret; - echan->slot[0] = edma_alloc_slot(echan->ecc, echan->ch_num); + echan->slot[0] = edma_alloc_slot(ecc, echan->ch_num); if (echan->slot[0] < 0) { dev_err(dev, "Entry slot allocation failed for channel %u\n", EDMA_CHAN_SLOT(echan->ch_num)); @@ -1631,8 +1613,11 @@ static int edma_alloc_chan_resources(struct dma_chan *chan) edma_set_chmap(echan, echan->slot[0]); echan->alloced = true; - dev_dbg(dev, "allocated channel %d for %u:%u\n", echan->ch_num, - EDMA_CTLR(echan->ch_num), EDMA_CHAN_SLOT(echan->ch_num)); + dev_dbg(dev, "Got eDMA channel %d for virt channel %d (%s trigger)\n", + EDMA_CHAN_SLOT(echan->ch_num), chan->chan_id, + echan->hw_triggered ? "HW" : "SW"); + + edma_tc_set_pm_state(echan->tc, true); return 0; @@ -1645,6 +1630,7 @@ err_slot: static void edma_free_chan_resources(struct dma_chan *chan) { struct edma_chan *echan = to_edma_chan(chan); + struct device *dev = echan->ecc->dev; int i; /* Terminate transfers */ @@ -1669,7 +1655,12 @@ static void edma_free_chan_resources(struct dma_chan *chan) echan->alloced = false; } - dev_dbg(chan->device->dev, "freeing channel for %u\n", echan->ch_num); + edma_tc_set_pm_state(echan->tc, false); + echan->tc = NULL; + echan->hw_triggered = false; + + dev_dbg(dev, "Free eDMA channel %d for virt channel %d\n", + EDMA_CHAN_SLOT(echan->ch_num), chan->chan_id); } /* Send pending descriptor to hardware */ @@ -1756,41 +1747,90 @@ static enum dma_status edma_tx_status(struct dma_chan *chan, return ret; } +static bool edma_is_memcpy_channel(int ch_num, u16 *memcpy_channels) +{ + s16 *memcpy_ch = memcpy_channels; + + if (!memcpy_channels) + return false; + while (*memcpy_ch != -1) { + if (*memcpy_ch == ch_num) + return true; + memcpy_ch++; + } + return false; +} + #define EDMA_DMA_BUSWIDTHS (BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) | \ BIT(DMA_SLAVE_BUSWIDTH_2_BYTES) | \ BIT(DMA_SLAVE_BUSWIDTH_3_BYTES) | \ BIT(DMA_SLAVE_BUSWIDTH_4_BYTES)) -static void edma_dma_init(struct edma_cc *ecc) +static void edma_dma_init(struct edma_cc *ecc, bool legacy_mode) { - struct dma_device *ddev = &ecc->dma_slave; + struct dma_device *s_ddev = &ecc->dma_slave; + struct dma_device *m_ddev = NULL; + s16 *memcpy_channels = ecc->info->memcpy_channels; int i, j; - dma_cap_zero(ddev->cap_mask); - dma_cap_set(DMA_SLAVE, ddev->cap_mask); - dma_cap_set(DMA_CYCLIC, ddev->cap_mask); - dma_cap_set(DMA_MEMCPY, ddev->cap_mask); + dma_cap_zero(s_ddev->cap_mask); + dma_cap_set(DMA_SLAVE, s_ddev->cap_mask); + dma_cap_set(DMA_CYCLIC, s_ddev->cap_mask); + if (ecc->legacy_mode && !memcpy_channels) { + dev_warn(ecc->dev, + "Legacy memcpy is enabled, things might not work\n"); - ddev->device_prep_slave_sg = edma_prep_slave_sg; - ddev->device_prep_dma_cyclic = edma_prep_dma_cyclic; - ddev->device_prep_dma_memcpy = edma_prep_dma_memcpy; - ddev->device_alloc_chan_resources = edma_alloc_chan_resources; - ddev->device_free_chan_resources = edma_free_chan_resources; - ddev->device_issue_pending = edma_issue_pending; - ddev->device_tx_status = edma_tx_status; - ddev->device_config = edma_slave_config; - ddev->device_pause = edma_dma_pause; - ddev->device_resume = edma_dma_resume; - ddev->device_terminate_all = edma_terminate_all; - - ddev->src_addr_widths = EDMA_DMA_BUSWIDTHS; - ddev->dst_addr_widths = EDMA_DMA_BUSWIDTHS; - ddev->directions = BIT(DMA_DEV_TO_MEM) | BIT(DMA_MEM_TO_DEV); - ddev->residue_granularity = DMA_RESIDUE_GRANULARITY_BURST; - - ddev->dev = ecc->dev; + dma_cap_set(DMA_MEMCPY, s_ddev->cap_mask); + s_ddev->device_prep_dma_memcpy = edma_prep_dma_memcpy; + s_ddev->directions = BIT(DMA_MEM_TO_MEM); + } - INIT_LIST_HEAD(&ddev->channels); + s_ddev->device_prep_slave_sg = edma_prep_slave_sg; + s_ddev->device_prep_dma_cyclic = edma_prep_dma_cyclic; + s_ddev->device_alloc_chan_resources = edma_alloc_chan_resources; + s_ddev->device_free_chan_resources = edma_free_chan_resources; + s_ddev->device_issue_pending = edma_issue_pending; + s_ddev->device_tx_status = edma_tx_status; + s_ddev->device_config = edma_slave_config; + s_ddev->device_pause = edma_dma_pause; + s_ddev->device_resume = edma_dma_resume; + s_ddev->device_terminate_all = edma_terminate_all; + + s_ddev->src_addr_widths = EDMA_DMA_BUSWIDTHS; + s_ddev->dst_addr_widths = EDMA_DMA_BUSWIDTHS; + s_ddev->directions |= (BIT(DMA_DEV_TO_MEM) | BIT(DMA_MEM_TO_DEV)); + s_ddev->residue_granularity = DMA_RESIDUE_GRANULARITY_BURST; + + s_ddev->dev = ecc->dev; + INIT_LIST_HEAD(&s_ddev->channels); + + if (memcpy_channels) { + m_ddev = devm_kzalloc(ecc->dev, sizeof(*m_ddev), GFP_KERNEL); + ecc->dma_memcpy = m_ddev; + + dma_cap_zero(m_ddev->cap_mask); + dma_cap_set(DMA_MEMCPY, m_ddev->cap_mask); + + m_ddev->device_prep_dma_memcpy = edma_prep_dma_memcpy; + m_ddev->device_alloc_chan_resources = edma_alloc_chan_resources; + m_ddev->device_free_chan_resources = edma_free_chan_resources; + m_ddev->device_issue_pending = edma_issue_pending; + m_ddev->device_tx_status = edma_tx_status; + m_ddev->device_config = edma_slave_config; + m_ddev->device_pause = edma_dma_pause; + m_ddev->device_resume = edma_dma_resume; + m_ddev->device_terminate_all = edma_terminate_all; + + m_ddev->src_addr_widths = EDMA_DMA_BUSWIDTHS; + m_ddev->dst_addr_widths = EDMA_DMA_BUSWIDTHS; + m_ddev->directions = BIT(DMA_MEM_TO_MEM); + m_ddev->residue_granularity = DMA_RESIDUE_GRANULARITY_BURST; + + m_ddev->dev = ecc->dev; + INIT_LIST_HEAD(&m_ddev->channels); + } else if (!ecc->legacy_mode) { + dev_info(ecc->dev, "memcpy is disabled\n"); + } for (i = 0; i < ecc->num_channels; i++) { struct edma_chan *echan = &ecc->slave_chans[i]; @@ -1798,7 +1838,10 @@ static void edma_dma_init(struct edma_cc *ecc) echan->ecc = ecc; echan->vchan.desc_free = edma_desc_free; - vchan_init(&echan->vchan, ddev); + if (m_ddev && edma_is_memcpy_channel(i, memcpy_channels)) + vchan_init(&echan->vchan, m_ddev); + else + vchan_init(&echan->vchan, s_ddev); INIT_LIST_HEAD(&echan->node); for (j = 0; j < EDMA_MAX_SLOTS; j++) @@ -1921,7 +1964,8 @@ static int edma_xbar_event_map(struct device *dev, struct edma_soc_info *pdata, return 0; } -static struct edma_soc_info *edma_setup_info_from_dt(struct device *dev) +static struct edma_soc_info *edma_setup_info_from_dt(struct device *dev, + bool legacy_mode) { struct edma_soc_info *info; struct property *prop; @@ -1932,20 +1976,121 @@ static struct edma_soc_info *edma_setup_info_from_dt(struct device *dev) if (!info) return ERR_PTR(-ENOMEM); - prop = of_find_property(dev->of_node, "ti,edma-xbar-event-map", &sz); + if (legacy_mode) { + prop = of_find_property(dev->of_node, "ti,edma-xbar-event-map", + &sz); + if (prop) { + ret = edma_xbar_event_map(dev, info, sz); + if (ret) + return ERR_PTR(ret); + } + return info; + } + + /* Get the list of channels allocated to be used for memcpy */ + prop = of_find_property(dev->of_node, "ti,edma-memcpy-channels", &sz); + if (prop) { + const char pname[] = "ti,edma-memcpy-channels"; + size_t nelm = sz / sizeof(s16); + s16 *memcpy_ch; + + memcpy_ch = devm_kcalloc(dev, nelm + 1, sizeof(s16), + GFP_KERNEL); + if (!memcpy_ch) + return ERR_PTR(-ENOMEM); + + ret = of_property_read_u16_array(dev->of_node, pname, + (u16 *)memcpy_ch, nelm); + if (ret) + return ERR_PTR(ret); + + memcpy_ch[nelm] = -1; + info->memcpy_channels = memcpy_ch; + } + + prop = of_find_property(dev->of_node, "ti,edma-reserved-slot-ranges", + &sz); if (prop) { - ret = edma_xbar_event_map(dev, info, sz); + const char pname[] = "ti,edma-reserved-slot-ranges"; + s16 (*rsv_slots)[2]; + size_t nelm = sz / sizeof(*rsv_slots); + struct edma_rsv_info *rsv_info; + + if (!nelm) + return info; + + rsv_info = devm_kzalloc(dev, sizeof(*rsv_info), GFP_KERNEL); + if (!rsv_info) + return ERR_PTR(-ENOMEM); + + rsv_slots = devm_kcalloc(dev, nelm + 1, sizeof(*rsv_slots), + GFP_KERNEL); + if (!rsv_slots) + return ERR_PTR(-ENOMEM); + + ret = of_property_read_u16_array(dev->of_node, pname, + (u16 *)rsv_slots, nelm * 2); if (ret) return ERR_PTR(ret); + + rsv_slots[nelm][0] = -1; + rsv_slots[nelm][1] = -1; + info->rsv = rsv_info; + info->rsv->rsv_slots = (const s16 (*)[2])rsv_slots; } return info; } + +static struct dma_chan *of_edma_xlate(struct of_phandle_args *dma_spec, + struct of_dma *ofdma) +{ + struct edma_cc *ecc = ofdma->of_dma_data; + struct dma_chan *chan = NULL; + struct edma_chan *echan; + int i; + + if (!ecc || dma_spec->args_count < 1) + return NULL; + + for (i = 0; i < ecc->num_channels; i++) { + echan = &ecc->slave_chans[i]; + if (echan->ch_num == dma_spec->args[0]) { + chan = &echan->vchan.chan; + break; + } + } + + if (!chan) + return NULL; + + if (echan->ecc->legacy_mode && dma_spec->args_count == 1) + goto out; + + if (!echan->ecc->legacy_mode && dma_spec->args_count == 2 && + dma_spec->args[1] < echan->ecc->num_tc) { + echan->tc = &echan->ecc->tc_list[dma_spec->args[1]]; + goto out; + } + + return NULL; +out: + /* The channel is going to be used as HW synchronized */ + echan->hw_triggered = true; + return dma_get_slave_channel(chan); +} #else -static struct edma_soc_info *edma_setup_info_from_dt(struct device *dev) +static struct edma_soc_info *edma_setup_info_from_dt(struct device *dev, + bool legacy_mode) { return ERR_PTR(-EINVAL); } + +static struct dma_chan *of_edma_xlate(struct of_phandle_args *dma_spec, + struct of_dma *ofdma) +{ + return NULL; +} #endif static int edma_probe(struct platform_device *pdev) @@ -1953,7 +2098,6 @@ static int edma_probe(struct platform_device *pdev) struct edma_soc_info *info = pdev->dev.platform_data; s8 (*queue_priority_mapping)[2]; int i, off, ln; - const s16 (*rsv_chans)[2]; const s16 (*rsv_slots)[2]; const s16 (*xbar_chans)[2]; int irq; @@ -1962,10 +2106,17 @@ static int edma_probe(struct platform_device *pdev) struct device_node *node = pdev->dev.of_node; struct device *dev = &pdev->dev; struct edma_cc *ecc; + bool legacy_mode = true; int ret; if (node) { - info = edma_setup_info_from_dt(dev); + const struct of_device_id *match; + + match = of_match_node(edma_of_ids, node); + if (match && (u32)match->data == EDMA_BINDING_TPCC) + legacy_mode = false; + + info = edma_setup_info_from_dt(dev, legacy_mode); if (IS_ERR(info)) { dev_err(dev, "failed to get DT data\n"); return PTR_ERR(info); @@ -1994,6 +2145,7 @@ static int edma_probe(struct platform_device *pdev) ecc->dev = dev; ecc->id = pdev->id; + ecc->legacy_mode = legacy_mode; /* When booting with DT the pdev->id is -1 */ if (ecc->id < 0) ecc->id = 0; @@ -2024,12 +2176,6 @@ static int edma_probe(struct platform_device *pdev) if (!ecc->slave_chans) return -ENOMEM; - ecc->channel_unused = devm_kcalloc(dev, - BITS_TO_LONGS(ecc->num_channels), - sizeof(unsigned long), GFP_KERNEL); - if (!ecc->channel_unused) - return -ENOMEM; - ecc->slot_inuse = devm_kcalloc(dev, BITS_TO_LONGS(ecc->num_slots), sizeof(unsigned long), GFP_KERNEL); if (!ecc->slot_inuse) @@ -2040,20 +2186,7 @@ static int edma_probe(struct platform_device *pdev) for (i = 0; i < ecc->num_slots; i++) edma_write_slot(ecc, i, &dummy_paramset); - /* Mark all channels as unused */ - memset(ecc->channel_unused, 0xff, sizeof(ecc->channel_unused)); - if (info->rsv) { - /* Clear the reserved channels in unused list */ - rsv_chans = info->rsv->rsv_chans; - if (rsv_chans) { - for (i = 0; rsv_chans[i][0] != -1; i++) { - off = rsv_chans[i][0]; - ln = rsv_chans[i][1]; - clear_bits(off, ln, ecc->channel_unused); - } - } - /* Set the reserved slots in inuse list */ rsv_slots = info->rsv->rsv_slots; if (rsv_slots) { @@ -2070,7 +2203,6 @@ static int edma_probe(struct platform_device *pdev) if (xbar_chans) { for (i = 0; xbar_chans[i][1] != -1; i++) { off = xbar_chans[i][1]; - clear_bits(off, 1, ecc->channel_unused); } } @@ -2112,6 +2244,31 @@ static int edma_probe(struct platform_device *pdev) queue_priority_mapping = info->queue_priority_mapping; + if (!ecc->legacy_mode) { + int lowest_priority = 0; + struct of_phandle_args tc_args; + + ecc->tc_list = devm_kcalloc(dev, ecc->num_tc, + sizeof(*ecc->tc_list), GFP_KERNEL); + if (!ecc->tc_list) + return -ENOMEM; + + for (i = 0;; i++) { + ret = of_parse_phandle_with_fixed_args(node, "ti,tptcs", + 1, i, &tc_args); + if (ret || i == ecc->num_tc) + break; + + ecc->tc_list[i].node = tc_args.np; + ecc->tc_list[i].id = i; + queue_priority_mapping[i][1] = tc_args.args[0]; + if (queue_priority_mapping[i][1] > lowest_priority) { + lowest_priority = queue_priority_mapping[i][1]; + info->default_queue = i; + } + } + } + /* Event queue priority mapping */ for (i = 0; queue_priority_mapping[i][0] != -1; i++) edma_assign_priority_to_queue(ecc, queue_priority_mapping[i][0], @@ -2125,7 +2282,7 @@ static int edma_probe(struct platform_device *pdev) ecc->info = info; /* Init the dma device and channels */ - edma_dma_init(ecc); + edma_dma_init(ecc, legacy_mode); for (i = 0; i < ecc->num_channels; i++) { /* Assign all channels to the default queue */ @@ -2136,12 +2293,23 @@ static int edma_probe(struct platform_device *pdev) } ret = dma_async_device_register(&ecc->dma_slave); - if (ret) + if (ret) { + dev_err(dev, "slave ddev registration failed (%d)\n", ret); goto err_reg1; + } + + if (ecc->dma_memcpy) { + ret = dma_async_device_register(ecc->dma_memcpy); + if (ret) { + dev_err(dev, "memcpy ddev registration failed (%d)\n", + ret); + dma_async_device_unregister(&ecc->dma_slave); + goto err_reg1; + } + } if (node) - of_dma_controller_register(node, of_dma_xlate_by_chan_id, - &ecc->dma_slave); + of_dma_controller_register(node, of_edma_xlate, ecc); dev_info(dev, "TI EDMA DMA engine driver\n"); @@ -2160,12 +2328,30 @@ static int edma_remove(struct platform_device *pdev) if (dev->of_node) of_dma_controller_free(dev->of_node); dma_async_device_unregister(&ecc->dma_slave); + if (ecc->dma_memcpy) + dma_async_device_unregister(ecc->dma_memcpy); edma_free_slot(ecc, ecc->dummy_slot); return 0; } #ifdef CONFIG_PM_SLEEP +static int edma_pm_suspend(struct device *dev) +{ + struct edma_cc *ecc = dev_get_drvdata(dev); + struct edma_chan *echan = ecc->slave_chans; + int i; + + for (i = 0; i < ecc->num_channels; i++) { + if (echan[i].alloced) { + edma_setup_interrupt(&echan[i], false); + edma_tc_set_pm_state(echan[i].tc, false); + } + } + + return 0; +} + static int edma_pm_resume(struct device *dev) { struct edma_cc *ecc = dev_get_drvdata(dev); @@ -2190,6 +2376,8 @@ static int edma_pm_resume(struct device *dev) /* Set up channel -> slot mapping for the entry slot */ edma_set_chmap(&echan[i], echan[i].slot[0]); + + edma_tc_set_pm_state(echan[i].tc, true); } } @@ -2198,7 +2386,7 @@ static int edma_pm_resume(struct device *dev) #endif static const struct dev_pm_ops edma_pm_ops = { - SET_LATE_SYSTEM_SLEEP_PM_OPS(NULL, edma_pm_resume) + SET_LATE_SYSTEM_SLEEP_PM_OPS(edma_pm_suspend, edma_pm_resume) }; static struct platform_driver edma_driver = { @@ -2213,12 +2401,18 @@ static struct platform_driver edma_driver = { bool edma_filter_fn(struct dma_chan *chan, void *param) { + bool match = false; + if (chan->device->dev->driver == &edma_driver.driver) { struct edma_chan *echan = to_edma_chan(chan); unsigned ch_req = *(unsigned *)param; - return ch_req == echan->ch_num; + if (ch_req == echan->ch_num) { + /* The channel is going to be used as HW synchronized */ + echan->hw_triggered = true; + match = true; + } } - return false; + return match; } EXPORT_SYMBOL(edma_filter_fn); |