From 5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Tue, 21 Feb 2023 18:24:12 -0800 Subject: Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next Pull networking updates from Jakub Kicinski: "Core: - Add dedicated kmem_cache for typical/small skb->head, avoid having to access struct page at kfree time, and improve memory use. - Introduce sysctl to set default RPS configuration for new netdevs. - Define Netlink protocol specification format which can be used to describe messages used by each family and auto-generate parsers. Add tools for generating kernel data structures and uAPI headers. - Expose all net/core sysctls inside netns. - Remove 4s sleep in netpoll if carrier is instantly detected on boot. - Add configurable limit of MDB entries per port, and port-vlan. - Continue populating drop reasons throughout the stack. - Retire a handful of legacy Qdiscs and classifiers. Protocols: - Support IPv4 big TCP (TSO frames larger than 64kB). - Add IP_LOCAL_PORT_RANGE socket option, to control local port range on socket by socket basis. - Track and report in procfs number of MPTCP sockets used. - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path manager. - IPv6: don't check net.ipv6.route.max_size and rely on garbage collection to free memory (similarly to IPv4). - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986). - ICMP: add per-rate limit counters. - Add support for user scanning requests in ieee802154. - Remove static WEP support. - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate reporting. - WiFi 7 EHT channel puncturing support (client & AP). BPF: - Add a rbtree data structure following the "next-gen data structure" precedent set by recently added linked list, that is, by using kfunc + kptr instead of adding a new BPF map type. - Expose XDP hints via kfuncs with initial support for RX hash and timestamp metadata. - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to better support decap on GRE tunnel devices not operating in collect metadata. - Improve x86 JIT's codegen for PROBE_MEM runtime error checks. - Remove the need for trace_printk_lock for bpf_trace_printk and bpf_trace_vprintk helpers. - Extend libbpf's bpf_tracing.h support for tracing arguments of kprobes/uprobes and syscall as a special case. - Significantly reduce the search time for module symbols by livepatch and BPF. - Enable cpumasks to be used as kptrs, which is useful for tracing programs tracking which tasks end up running on which CPUs in different time intervals. - Add support for BPF trampoline on s390x and riscv64. - Add capability to export the XDP features supported by the NIC. - Add __bpf_kfunc tag for marking kernel functions as kfuncs. - Add cgroup.memory=nobpf kernel parameter option to disable BPF memory accounting for container environments. Netfilter: - Remove the CLUSTERIP target. It has been marked as obsolete for years, and we still have WARN splats wrt races of the out-of-band /proc interface installed by this target. - Add 'destroy' commands to nf_tables. They are identical to the existing 'delete' commands, but do not return an error if the referenced object (set, chain, rule...) did not exist. Driver API: - Improve cpumask_local_spread() locality to help NICs set the right IRQ affinity on AMD platforms. - Separate C22 and C45 MDIO bus transactions more clearly. - Introduce new DCB table to control DSCP rewrite on egress. - Support configuration of Physical Layer Collision Avoidance (PLCA) Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of shared medium Ethernet. - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing preemption of low priority frames by high priority frames. - Add support for controlling MACSec offload using netlink SET. - Rework devlink instance refcounts to allow registration and de-registration under the instance lock. Split the code into multiple files, drop some of the unnecessarily granular locks and factor out common parts of netlink operation handling. - Add TX frame aggregation parameters (for USB drivers). - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning messages with notifications for debug. - Allow offloading of UDP NEW connections via act_ct. - Add support for per action HW stats in TC. - Support hardware miss to TC action (continue processing in SW from a specific point in the action chain). - Warn if old Wireless Extension user space interface is used with modern cfg80211/mac80211 drivers. Do not support Wireless Extensions for Wi-Fi 7 devices at all. Everyone should switch to using nl80211 interface instead. - Improve the CAN bit timing configuration. Use extack to return error messages directly to user space, update the SJW handling, including the definition of a new default value that will benefit CAN-FD controllers, by increasing their oscillator tolerance. New hardware / drivers: - Ethernet: - nVidia BlueField-3 support (control traffic driver) - Ethernet support for imx93 SoCs - Motorcomm yt8531 gigabit Ethernet PHY - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA) - Microchip LAN8841 PHY (incl. cable diagnostics and PTP) - Amlogic gxl MDIO mux - WiFi: - RealTek RTL8188EU (rtl8xxxu) - Qualcomm Wi-Fi 7 devices (ath12k) - CAN: - Renesas R-Car V4H Drivers: - Bluetooth: - Set Per Platform Antenna Gain (PPAG) for Intel controllers. - Ethernet NICs: - Intel (1G, igc): - support TSN / Qbv / packet scheduling features of i226 model - Intel (100G, ice): - use GNSS subsystem instead of TTY - multi-buffer XDP support - extend support for GPIO pins to E823 devices - nVidia/Mellanox: - update the shared buffer configuration on PFC commands - implement PTP adjphase function for HW offset control - TC support for Geneve and GRE with VF tunnel offload - more efficient crypto key management method - multi-port eswitch support - Netronome/Corigine: - add DCB IEEE support - support IPsec offloading for NFP3800 - Freescale/NXP (enetc): - support XDP_REDIRECT for XDP non-linear buffers - improve reconfig, avoid link flap and waiting for idle - support MAC Merge layer - Other NICs: - sfc/ef100: add basic devlink support for ef100 - ionic: rx_push mode operation (writing descriptors via MMIO) - bnxt: use the auxiliary bus abstraction for RDMA - r8169: disable ASPM and reset bus in case of tx timeout - cpsw: support QSGMII mode for J721e CPSW9G - cpts: support pulse-per-second output - ngbe: add an mdio bus driver - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing - r8152: handle devices with FW with NCM support - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation - virtio-net: support multi buffer XDP - virtio/vsock: replace virtio_vsock_pkt with sk_buff - tsnep: XDP support - Ethernet high-speed switches: - nVidia/Mellanox (mlxsw): - add support for latency TLV (in FW control messages) - Microchip (sparx5): - separate explicit and implicit traffic forwarding rules, make the implicit rules always active - add support for egress DSCP rewrite - IS0 VCAP support (Ingress Classification) - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS etc.) - ES2 VCAP support (Egress Access Control) - support for Per-Stream Filtering and Policing (802.1Q, 8.6.5.1) - Ethernet embedded switches: - Marvell (mv88e6xxx): - add MAB (port auth) offload support - enable PTP receive for mv88e6390 - NXP (ocelot): - support MAC Merge layer - support for the the vsc7512 internal copper phys - Microchip: - lan9303: convert to PHYLINK - lan966x: support TC flower filter statistics - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x - lan937x: support Credit Based Shaper configuration - ksz9477: support Energy Efficient Ethernet - other: - qca8k: convert to regmap read/write API, use bulk operations - rswitch: Improve TX timestamp accuracy - Intel WiFi (iwlwifi): - EHT (Wi-Fi 7) rate reporting - STEP equalizer support: transfer some STEP (connection to radio on platforms with integrated wifi) related parameters from the BIOS to the firmware. - Qualcomm 802.11ax WiFi (ath11k): - IPQ5018 support - Fine Timing Measurement (FTM) responder role support - channel 177 support - MediaTek WiFi (mt76): - per-PHY LED support - mt7996: EHT (Wi-Fi 7) support - Wireless Ethernet Dispatch (WED) reset support - switch to using page pool allocator - RealTek WiFi (rtw89): - support new version of Bluetooth co-existance - Mobile: - rmnet: support TX aggregation" * tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits) page_pool: add a comment explaining the fragment counter usage net: ethtool: fix __ethtool_dev_mm_supported() implementation ethtool: pse-pd: Fix double word in comments xsk: add linux/vmalloc.h to xsk.c sefltests: netdevsim: wait for devlink instance after netns removal selftest: fib_tests: Always cleanup before exit net/mlx5e: Align IPsec ASO result memory to be as required by hardware net/mlx5e: TC, Set CT miss to the specific ct action instance net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG net/mlx5: Refactor tc miss handling to a single function net/mlx5: Kconfig: Make tc offload depend on tc skb extension net/sched: flower: Support hardware miss to tc action net/sched: flower: Move filter handle initialization earlier net/sched: cls_api: Support hardware miss to tc action net/sched: Rename user cookie and act cookie sfc: fix builds without CONFIG_RTC_LIB sfc: clean up some inconsistent indentings net/mlx4_en: Introduce flexible array to silence overflow warning net: lan966x: Fix possible deadlock inside PTP net/ulp: Remove redundant ->clone() test in inet_clone_ulp(). ... --- sound/soc/fsl/mpc5200_dma.c | 454 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 454 insertions(+) create mode 100644 sound/soc/fsl/mpc5200_dma.c (limited to 'sound/soc/fsl/mpc5200_dma.c') diff --git a/sound/soc/fsl/mpc5200_dma.c b/sound/soc/fsl/mpc5200_dma.c new file mode 100644 index 000000000..901497810 --- /dev/null +++ b/sound/soc/fsl/mpc5200_dma.c @@ -0,0 +1,454 @@ +// SPDX-License-Identifier: GPL-2.0-only +// +// Freescale MPC5200 PSC DMA +// ALSA SoC Platform driver +// +// Copyright (C) 2008 Secret Lab Technologies Ltd. +// Copyright (C) 2009 Jon Smirl, Digispeaker + +#include +#include +#include +#include +#include +#include +#include + +#include + +#include +#include +#include + +#include "mpc5200_dma.h" + +#define DRV_NAME "mpc5200_dma" + +/* + * Interrupt handlers + */ +static irqreturn_t psc_dma_status_irq(int irq, void *_psc_dma) +{ + struct psc_dma *psc_dma = _psc_dma; + struct mpc52xx_psc __iomem *regs = psc_dma->psc_regs; + u16 isr; + + isr = in_be16(®s->mpc52xx_psc_isr); + + /* Playback underrun error */ + if (psc_dma->playback.active && (isr & MPC52xx_PSC_IMR_TXEMP)) + psc_dma->stats.underrun_count++; + + /* Capture overrun error */ + if (psc_dma->capture.active && (isr & MPC52xx_PSC_IMR_ORERR)) + psc_dma->stats.overrun_count++; + + out_8(®s->command, MPC52xx_PSC_RST_ERR_STAT); + + return IRQ_HANDLED; +} + +/** + * psc_dma_bcom_enqueue_next_buffer - Enqueue another audio buffer + * @s: pointer to stream private data structure + * + * Enqueues another audio period buffer into the bestcomm queue. + * + * Note: The routine must only be called when there is space available in + * the queue. Otherwise the enqueue will fail and the audio ring buffer + * will get out of sync + */ +static void psc_dma_bcom_enqueue_next_buffer(struct psc_dma_stream *s) +{ + struct bcom_bd *bd; + + /* Prepare and enqueue the next buffer descriptor */ + bd = bcom_prepare_next_buffer(s->bcom_task); + bd->status = s->period_bytes; + bd->data[0] = s->runtime->dma_addr + (s->period_next * s->period_bytes); + bcom_submit_next_buffer(s->bcom_task, NULL); + + /* Update for next period */ + s->period_next = (s->period_next + 1) % s->runtime->periods; +} + +/* Bestcomm DMA irq handler */ +static irqreturn_t psc_dma_bcom_irq(int irq, void *_psc_dma_stream) +{ + struct psc_dma_stream *s = _psc_dma_stream; + + spin_lock(&s->psc_dma->lock); + /* For each finished period, dequeue the completed period buffer + * and enqueue a new one in it's place. */ + while (bcom_buffer_done(s->bcom_task)) { + bcom_retrieve_buffer(s->bcom_task, NULL, NULL); + + s->period_current = (s->period_current+1) % s->runtime->periods; + s->period_count++; + + psc_dma_bcom_enqueue_next_buffer(s); + } + spin_unlock(&s->psc_dma->lock); + + /* If the stream is active, then also inform the PCM middle layer + * of the period finished event. */ + if (s->active) + snd_pcm_period_elapsed(s->stream); + + return IRQ_HANDLED; +} + +/** + * psc_dma_trigger: start and stop the DMA transfer. + * + * This function is called by ALSA to start, stop, pause, and resume the DMA + * transfer of data. + */ +static int psc_dma_trigger(struct snd_soc_component *component, + struct snd_pcm_substream *substream, int cmd) +{ + struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); + struct psc_dma *psc_dma = snd_soc_dai_get_drvdata(asoc_rtd_to_cpu(rtd, 0)); + struct snd_pcm_runtime *runtime = substream->runtime; + struct psc_dma_stream *s = to_psc_dma_stream(substream, psc_dma); + struct mpc52xx_psc __iomem *regs = psc_dma->psc_regs; + u16 imr; + unsigned long flags; + int i; + + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + dev_dbg(psc_dma->dev, "START: stream=%i fbits=%u ps=%u #p=%u\n", + substream->pstr->stream, runtime->frame_bits, + (int)runtime->period_size, runtime->periods); + s->period_bytes = frames_to_bytes(runtime, + runtime->period_size); + s->period_next = 0; + s->period_current = 0; + s->active = 1; + s->period_count = 0; + s->runtime = runtime; + + /* Fill up the bestcomm bd queue and enable DMA. + * This will begin filling the PSC's fifo. + */ + spin_lock_irqsave(&psc_dma->lock, flags); + + if (substream->pstr->stream == SNDRV_PCM_STREAM_CAPTURE) + bcom_gen_bd_rx_reset(s->bcom_task); + else + bcom_gen_bd_tx_reset(s->bcom_task); + + for (i = 0; i < runtime->periods; i++) + if (!bcom_queue_full(s->bcom_task)) + psc_dma_bcom_enqueue_next_buffer(s); + + bcom_enable(s->bcom_task); + spin_unlock_irqrestore(&psc_dma->lock, flags); + + out_8(®s->command, MPC52xx_PSC_RST_ERR_STAT); + + break; + + case SNDRV_PCM_TRIGGER_STOP: + dev_dbg(psc_dma->dev, "STOP: stream=%i periods_count=%i\n", + substream->pstr->stream, s->period_count); + s->active = 0; + + spin_lock_irqsave(&psc_dma->lock, flags); + bcom_disable(s->bcom_task); + if (substream->pstr->stream == SNDRV_PCM_STREAM_CAPTURE) + bcom_gen_bd_rx_reset(s->bcom_task); + else + bcom_gen_bd_tx_reset(s->bcom_task); + spin_unlock_irqrestore(&psc_dma->lock, flags); + + break; + + default: + dev_dbg(psc_dma->dev, "unhandled trigger: stream=%i cmd=%i\n", + substream->pstr->stream, cmd); + return -EINVAL; + } + + /* Update interrupt enable settings */ + imr = 0; + if (psc_dma->playback.active) + imr |= MPC52xx_PSC_IMR_TXEMP; + if (psc_dma->capture.active) + imr |= MPC52xx_PSC_IMR_ORERR; + out_be16(®s->isr_imr.imr, psc_dma->imr | imr); + + return 0; +} + + +/* --------------------------------------------------------------------- + * The PSC DMA 'ASoC platform' driver + * + * Can be referenced by an 'ASoC machine' driver + * This driver only deals with the audio bus; it doesn't have any + * interaction with the attached codec + */ + +static const struct snd_pcm_hardware psc_dma_hardware = { + .info = SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID | + SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER | + SNDRV_PCM_INFO_BATCH, + .formats = SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_BE | + SNDRV_PCM_FMTBIT_S24_BE | SNDRV_PCM_FMTBIT_S32_BE, + .period_bytes_max = 1024 * 1024, + .period_bytes_min = 32, + .periods_min = 2, + .periods_max = 256, + .buffer_bytes_max = 2 * 1024 * 1024, + .fifo_size = 512, +}; + +static int psc_dma_open(struct snd_soc_component *component, + struct snd_pcm_substream *substream) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); + struct psc_dma *psc_dma = snd_soc_dai_get_drvdata(asoc_rtd_to_cpu(rtd, 0)); + struct psc_dma_stream *s; + int rc; + + dev_dbg(psc_dma->dev, "psc_dma_open(substream=%p)\n", substream); + + if (substream->pstr->stream == SNDRV_PCM_STREAM_CAPTURE) + s = &psc_dma->capture; + else + s = &psc_dma->playback; + + snd_soc_set_runtime_hwparams(substream, &psc_dma_hardware); + + rc = snd_pcm_hw_constraint_integer(runtime, + SNDRV_PCM_HW_PARAM_PERIODS); + if (rc < 0) { + dev_err(substream->pcm->card->dev, "invalid buffer size\n"); + return rc; + } + + s->stream = substream; + return 0; +} + +static int psc_dma_close(struct snd_soc_component *component, + struct snd_pcm_substream *substream) +{ + struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); + struct psc_dma *psc_dma = snd_soc_dai_get_drvdata(asoc_rtd_to_cpu(rtd, 0)); + struct psc_dma_stream *s; + + dev_dbg(psc_dma->dev, "psc_dma_close(substream=%p)\n", substream); + + if (substream->pstr->stream == SNDRV_PCM_STREAM_CAPTURE) + s = &psc_dma->capture; + else + s = &psc_dma->playback; + + if (!psc_dma->playback.active && + !psc_dma->capture.active) { + + /* Disable all interrupts and reset the PSC */ + out_be16(&psc_dma->psc_regs->isr_imr.imr, psc_dma->imr); + out_8(&psc_dma->psc_regs->command, 4 << 4); /* reset error */ + } + s->stream = NULL; + return 0; +} + +static snd_pcm_uframes_t +psc_dma_pointer(struct snd_soc_component *component, + struct snd_pcm_substream *substream) +{ + struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); + struct psc_dma *psc_dma = snd_soc_dai_get_drvdata(asoc_rtd_to_cpu(rtd, 0)); + struct psc_dma_stream *s; + dma_addr_t count; + + if (substream->pstr->stream == SNDRV_PCM_STREAM_CAPTURE) + s = &psc_dma->capture; + else + s = &psc_dma->playback; + + count = s->period_current * s->period_bytes; + + return bytes_to_frames(substream->runtime, count); +} + +static int psc_dma_new(struct snd_soc_component *component, + struct snd_soc_pcm_runtime *rtd) +{ + struct snd_card *card = rtd->card->snd_card; + struct snd_soc_dai *dai = asoc_rtd_to_cpu(rtd, 0); + struct snd_pcm *pcm = rtd->pcm; + size_t size = psc_dma_hardware.buffer_bytes_max; + int rc; + + dev_dbg(component->dev, "psc_dma_new(card=%p, dai=%p, pcm=%p)\n", + card, dai, pcm); + + rc = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32)); + if (rc) + return rc; + + return snd_pcm_set_fixed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV, card->dev, + size); +} + +static const struct snd_soc_component_driver mpc5200_audio_dma_component = { + .name = DRV_NAME, + .open = psc_dma_open, + .close = psc_dma_close, + .pointer = psc_dma_pointer, + .trigger = psc_dma_trigger, + .pcm_construct = psc_dma_new, +}; + +int mpc5200_audio_dma_create(struct platform_device *op) +{ + phys_addr_t fifo; + struct psc_dma *psc_dma; + struct resource res; + int size, irq, rc; + const __be32 *prop; + void __iomem *regs; + int ret; + + /* Fetch the registers and IRQ of the PSC */ + irq = irq_of_parse_and_map(op->dev.of_node, 0); + if (of_address_to_resource(op->dev.of_node, 0, &res)) { + dev_err(&op->dev, "Missing reg property\n"); + return -ENODEV; + } + regs = ioremap(res.start, resource_size(&res)); + if (!regs) { + dev_err(&op->dev, "Could not map registers\n"); + return -ENODEV; + } + + /* Allocate and initialize the driver private data */ + psc_dma = kzalloc(sizeof *psc_dma, GFP_KERNEL); + if (!psc_dma) { + ret = -ENOMEM; + goto out_unmap; + } + + /* Get the PSC ID */ + prop = of_get_property(op->dev.of_node, "cell-index", &size); + if (!prop || size < sizeof *prop) { + ret = -ENODEV; + goto out_free; + } + + spin_lock_init(&psc_dma->lock); + mutex_init(&psc_dma->mutex); + psc_dma->id = be32_to_cpu(*prop); + psc_dma->irq = irq; + psc_dma->psc_regs = regs; + psc_dma->fifo_regs = regs + sizeof *psc_dma->psc_regs; + psc_dma->dev = &op->dev; + psc_dma->playback.psc_dma = psc_dma; + psc_dma->capture.psc_dma = psc_dma; + snprintf(psc_dma->name, sizeof(psc_dma->name), "PSC%d", psc_dma->id); + + /* Find the address of the fifo data registers and setup the + * DMA tasks */ + fifo = res.start + offsetof(struct mpc52xx_psc, buffer.buffer_32); + psc_dma->capture.bcom_task = + bcom_psc_gen_bd_rx_init(psc_dma->id, 10, fifo, 512); + psc_dma->playback.bcom_task = + bcom_psc_gen_bd_tx_init(psc_dma->id, 10, fifo); + if (!psc_dma->capture.bcom_task || + !psc_dma->playback.bcom_task) { + dev_err(&op->dev, "Could not allocate bestcomm tasks\n"); + ret = -ENODEV; + goto out_free; + } + + /* Disable all interrupts and reset the PSC */ + out_be16(&psc_dma->psc_regs->isr_imr.imr, psc_dma->imr); + /* reset receiver */ + out_8(&psc_dma->psc_regs->command, MPC52xx_PSC_RST_RX); + /* reset transmitter */ + out_8(&psc_dma->psc_regs->command, MPC52xx_PSC_RST_TX); + /* reset error */ + out_8(&psc_dma->psc_regs->command, MPC52xx_PSC_RST_ERR_STAT); + /* reset mode */ + out_8(&psc_dma->psc_regs->command, MPC52xx_PSC_SEL_MODE_REG_1); + + /* Set up mode register; + * First write: RxRdy (FIFO Alarm) generates rx FIFO irq + * Second write: register Normal mode for non loopback + */ + out_8(&psc_dma->psc_regs->mode, 0); + out_8(&psc_dma->psc_regs->mode, 0); + + /* Set the TX and RX fifo alarm thresholds */ + out_be16(&psc_dma->fifo_regs->rfalarm, 0x100); + out_8(&psc_dma->fifo_regs->rfcntl, 0x4); + out_be16(&psc_dma->fifo_regs->tfalarm, 0x100); + out_8(&psc_dma->fifo_regs->tfcntl, 0x7); + + /* Lookup the IRQ numbers */ + psc_dma->playback.irq = + bcom_get_task_irq(psc_dma->playback.bcom_task); + psc_dma->capture.irq = + bcom_get_task_irq(psc_dma->capture.bcom_task); + + rc = request_irq(psc_dma->irq, &psc_dma_status_irq, IRQF_SHARED, + "psc-dma-status", psc_dma); + rc |= request_irq(psc_dma->capture.irq, &psc_dma_bcom_irq, IRQF_SHARED, + "psc-dma-capture", &psc_dma->capture); + rc |= request_irq(psc_dma->playback.irq, &psc_dma_bcom_irq, IRQF_SHARED, + "psc-dma-playback", &psc_dma->playback); + if (rc) { + ret = -ENODEV; + goto out_irq; + } + + /* Save what we've done so it can be found again later */ + dev_set_drvdata(&op->dev, psc_dma); + + /* Tell the ASoC OF helpers about it */ + return devm_snd_soc_register_component(&op->dev, + &mpc5200_audio_dma_component, NULL, 0); +out_irq: + free_irq(psc_dma->irq, psc_dma); + free_irq(psc_dma->capture.irq, &psc_dma->capture); + free_irq(psc_dma->playback.irq, &psc_dma->playback); +out_free: + kfree(psc_dma); +out_unmap: + iounmap(regs); + return ret; +} +EXPORT_SYMBOL_GPL(mpc5200_audio_dma_create); + +int mpc5200_audio_dma_destroy(struct platform_device *op) +{ + struct psc_dma *psc_dma = dev_get_drvdata(&op->dev); + + dev_dbg(&op->dev, "mpc5200_audio_dma_destroy()\n"); + + bcom_gen_bd_rx_release(psc_dma->capture.bcom_task); + bcom_gen_bd_tx_release(psc_dma->playback.bcom_task); + + /* Release irqs */ + free_irq(psc_dma->irq, psc_dma); + free_irq(psc_dma->capture.irq, &psc_dma->capture); + free_irq(psc_dma->playback.irq, &psc_dma->playback); + + iounmap(psc_dma->psc_regs); + kfree(psc_dma); + dev_set_drvdata(&op->dev, NULL); + + return 0; +} +EXPORT_SYMBOL_GPL(mpc5200_audio_dma_destroy); + +MODULE_AUTHOR("Grant Likely "); +MODULE_DESCRIPTION("Freescale MPC5200 PSC in DMA mode ASoC Driver"); +MODULE_LICENSE("GPL"); -- cgit v1.2.3