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authorLibravatar Linus Torvalds <torvalds@linux-foundation.org>2023-02-21 18:24:12 -0800
committerLibravatar Linus Torvalds <torvalds@linux-foundation.org>2023-02-21 18:24:12 -0800
commit5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 (patch)
treecc5c2d0a898769fd59549594fedb3ee6f84e59a0 /sound/soc/sti/uniperif_reader.c
downloadlinux-5b7c4cabbb65f5c469464da6c5f614cbd7f730f2.tar.gz
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Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted
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(). ...
Diffstat (limited to '')
-rw-r--r--sound/soc/sti/uniperif_reader.c436
1 files changed, 436 insertions, 0 deletions
diff --git a/sound/soc/sti/uniperif_reader.c b/sound/soc/sti/uniperif_reader.c
new file mode 100644
index 000000000..065c5f0d1
--- /dev/null
+++ b/sound/soc/sti/uniperif_reader.c
@@ -0,0 +1,436 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) STMicroelectronics SA 2015
+ * Authors: Arnaud Pouliquen <arnaud.pouliquen@st.com>
+ * for STMicroelectronics.
+ */
+
+#include <sound/soc.h>
+
+#include "uniperif.h"
+
+#define UNIPERIF_READER_I2S_IN 0 /* reader id connected to I2S/TDM TX bus */
+/*
+ * Note: snd_pcm_hardware is linked to DMA controller but is declared here to
+ * integrate unireader capability in term of rate and supported channels
+ */
+static const struct snd_pcm_hardware uni_reader_pcm_hw = {
+ .info = SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER |
+ SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_MMAP |
+ SNDRV_PCM_INFO_MMAP_VALID,
+ .formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S16_LE,
+
+ .rates = SNDRV_PCM_RATE_CONTINUOUS,
+ .rate_min = 8000,
+ .rate_max = 96000,
+
+ .channels_min = 2,
+ .channels_max = 8,
+
+ .periods_min = 2,
+ .periods_max = 48,
+
+ .period_bytes_min = 128,
+ .period_bytes_max = 64 * PAGE_SIZE,
+ .buffer_bytes_max = 256 * PAGE_SIZE
+};
+
+/*
+ * uni_reader_irq_handler
+ * In case of error audio stream is stopped; stop action is protected via PCM
+ * stream lock to avoid race condition with trigger callback.
+ */
+static irqreturn_t uni_reader_irq_handler(int irq, void *dev_id)
+{
+ irqreturn_t ret = IRQ_NONE;
+ struct uniperif *reader = dev_id;
+ unsigned int status;
+
+ spin_lock(&reader->irq_lock);
+ if (!reader->substream)
+ goto irq_spin_unlock;
+
+ snd_pcm_stream_lock(reader->substream);
+ if (reader->state == UNIPERIF_STATE_STOPPED) {
+ /* Unexpected IRQ: do nothing */
+ dev_warn(reader->dev, "unexpected IRQ\n");
+ goto stream_unlock;
+ }
+
+ /* Get interrupt status & clear them immediately */
+ status = GET_UNIPERIF_ITS(reader);
+ SET_UNIPERIF_ITS_BCLR(reader, status);
+
+ /* Check for fifo overflow error */
+ if (unlikely(status & UNIPERIF_ITS_FIFO_ERROR_MASK(reader))) {
+ dev_err(reader->dev, "FIFO error detected\n");
+
+ snd_pcm_stop(reader->substream, SNDRV_PCM_STATE_XRUN);
+
+ ret = IRQ_HANDLED;
+ }
+
+stream_unlock:
+ snd_pcm_stream_unlock(reader->substream);
+irq_spin_unlock:
+ spin_unlock(&reader->irq_lock);
+
+ return ret;
+}
+
+static int uni_reader_prepare_pcm(struct snd_pcm_runtime *runtime,
+ struct uniperif *reader)
+{
+ int slot_width;
+
+ /* Force slot width to 32 in I2S mode */
+ if ((reader->daifmt & SND_SOC_DAIFMT_FORMAT_MASK)
+ == SND_SOC_DAIFMT_I2S) {
+ slot_width = 32;
+ } else {
+ switch (runtime->format) {
+ case SNDRV_PCM_FORMAT_S16_LE:
+ slot_width = 16;
+ break;
+ default:
+ slot_width = 32;
+ break;
+ }
+ }
+
+ /* Number of bits per subframe (i.e one channel sample) on input. */
+ switch (slot_width) {
+ case 32:
+ SET_UNIPERIF_I2S_FMT_NBIT_32(reader);
+ SET_UNIPERIF_I2S_FMT_DATA_SIZE_32(reader);
+ break;
+ case 16:
+ SET_UNIPERIF_I2S_FMT_NBIT_16(reader);
+ SET_UNIPERIF_I2S_FMT_DATA_SIZE_16(reader);
+ break;
+ default:
+ dev_err(reader->dev, "subframe format not supported\n");
+ return -EINVAL;
+ }
+
+ /* Configure data memory format */
+ switch (runtime->format) {
+ case SNDRV_PCM_FORMAT_S16_LE:
+ /* One data word contains two samples */
+ SET_UNIPERIF_CONFIG_MEM_FMT_16_16(reader);
+ break;
+
+ case SNDRV_PCM_FORMAT_S32_LE:
+ /*
+ * Actually "16 bits/0 bits" means "32/28/24/20/18/16 bits
+ * on the MSB then zeros (if less than 32 bytes)"...
+ */
+ SET_UNIPERIF_CONFIG_MEM_FMT_16_0(reader);
+ break;
+
+ default:
+ dev_err(reader->dev, "format not supported\n");
+ return -EINVAL;
+ }
+
+ /* Number of channels must be even */
+ if ((runtime->channels % 2) || (runtime->channels < 2) ||
+ (runtime->channels > 10)) {
+ dev_err(reader->dev, "%s: invalid nb of channels\n", __func__);
+ return -EINVAL;
+ }
+
+ SET_UNIPERIF_I2S_FMT_NUM_CH(reader, runtime->channels / 2);
+ SET_UNIPERIF_I2S_FMT_ORDER_MSB(reader);
+
+ return 0;
+}
+
+static int uni_reader_prepare_tdm(struct snd_pcm_runtime *runtime,
+ struct uniperif *reader)
+{
+ int frame_size; /* user tdm frame size in bytes */
+ /* default unip TDM_WORD_POS_X_Y */
+ unsigned int word_pos[4] = {
+ 0x04060002, 0x0C0E080A, 0x14161012, 0x1C1E181A};
+
+ frame_size = sti_uniperiph_get_user_frame_size(runtime);
+
+ /* fix 16/0 format */
+ SET_UNIPERIF_CONFIG_MEM_FMT_16_0(reader);
+ SET_UNIPERIF_I2S_FMT_DATA_SIZE_32(reader);
+
+ /* number of words inserted on the TDM line */
+ SET_UNIPERIF_I2S_FMT_NUM_CH(reader, frame_size / 4 / 2);
+
+ SET_UNIPERIF_I2S_FMT_ORDER_MSB(reader);
+ SET_UNIPERIF_I2S_FMT_ALIGN_LEFT(reader);
+ SET_UNIPERIF_TDM_ENABLE_TDM_ENABLE(reader);
+
+ /*
+ * set the timeslots allocation for words in FIFO
+ *
+ * HW bug: (LSB word < MSB word) => this config is not possible
+ * So if we want (LSB word < MSB) word, then it shall be
+ * handled by user
+ */
+ sti_uniperiph_get_tdm_word_pos(reader, word_pos);
+ SET_UNIPERIF_TDM_WORD_POS(reader, 1_2, word_pos[WORD_1_2]);
+ SET_UNIPERIF_TDM_WORD_POS(reader, 3_4, word_pos[WORD_3_4]);
+ SET_UNIPERIF_TDM_WORD_POS(reader, 5_6, word_pos[WORD_5_6]);
+ SET_UNIPERIF_TDM_WORD_POS(reader, 7_8, word_pos[WORD_7_8]);
+
+ return 0;
+}
+
+static int uni_reader_prepare(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai);
+ struct uniperif *reader = priv->dai_data.uni;
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ int transfer_size, trigger_limit, ret;
+
+ /* The reader should be stopped */
+ if (reader->state != UNIPERIF_STATE_STOPPED) {
+ dev_err(reader->dev, "%s: invalid reader state %d\n", __func__,
+ reader->state);
+ return -EINVAL;
+ }
+
+ /* Calculate transfer size (in fifo cells and bytes) for frame count */
+ if (reader->type == SND_ST_UNIPERIF_TYPE_TDM) {
+ /* transfer size = unip frame size (in 32 bits FIFO cell) */
+ transfer_size =
+ sti_uniperiph_get_user_frame_size(runtime) / 4;
+ } else {
+ transfer_size = runtime->channels * UNIPERIF_FIFO_FRAMES;
+ }
+
+ /* Calculate number of empty cells available before asserting DREQ */
+ if (reader->ver < SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0)
+ trigger_limit = UNIPERIF_FIFO_SIZE - transfer_size;
+ else
+ /*
+ * Since SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0
+ * FDMA_TRIGGER_LIMIT also controls when the state switches
+ * from OFF or STANDBY to AUDIO DATA.
+ */
+ trigger_limit = transfer_size;
+
+ /* Trigger limit must be an even number */
+ if ((!trigger_limit % 2) ||
+ (trigger_limit != 1 && transfer_size % 2) ||
+ (trigger_limit > UNIPERIF_CONFIG_DMA_TRIG_LIMIT_MASK(reader))) {
+ dev_err(reader->dev, "invalid trigger limit %d\n",
+ trigger_limit);
+ return -EINVAL;
+ }
+
+ SET_UNIPERIF_CONFIG_DMA_TRIG_LIMIT(reader, trigger_limit);
+
+ if (UNIPERIF_TYPE_IS_TDM(reader))
+ ret = uni_reader_prepare_tdm(runtime, reader);
+ else
+ ret = uni_reader_prepare_pcm(runtime, reader);
+ if (ret)
+ return ret;
+
+ switch (reader->daifmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+ case SND_SOC_DAIFMT_I2S:
+ SET_UNIPERIF_I2S_FMT_ALIGN_LEFT(reader);
+ SET_UNIPERIF_I2S_FMT_PADDING_I2S_MODE(reader);
+ break;
+ case SND_SOC_DAIFMT_LEFT_J:
+ SET_UNIPERIF_I2S_FMT_ALIGN_LEFT(reader);
+ SET_UNIPERIF_I2S_FMT_PADDING_SONY_MODE(reader);
+ break;
+ case SND_SOC_DAIFMT_RIGHT_J:
+ SET_UNIPERIF_I2S_FMT_ALIGN_RIGHT(reader);
+ SET_UNIPERIF_I2S_FMT_PADDING_SONY_MODE(reader);
+ break;
+ default:
+ dev_err(reader->dev, "format not supported\n");
+ return -EINVAL;
+ }
+
+ /* Data clocking (changing) on the rising/falling edge */
+ switch (reader->daifmt & SND_SOC_DAIFMT_INV_MASK) {
+ case SND_SOC_DAIFMT_NB_NF:
+ SET_UNIPERIF_I2S_FMT_LR_POL_LOW(reader);
+ SET_UNIPERIF_I2S_FMT_SCLK_EDGE_RISING(reader);
+ break;
+ case SND_SOC_DAIFMT_NB_IF:
+ SET_UNIPERIF_I2S_FMT_LR_POL_HIG(reader);
+ SET_UNIPERIF_I2S_FMT_SCLK_EDGE_RISING(reader);
+ break;
+ case SND_SOC_DAIFMT_IB_NF:
+ SET_UNIPERIF_I2S_FMT_LR_POL_LOW(reader);
+ SET_UNIPERIF_I2S_FMT_SCLK_EDGE_FALLING(reader);
+ break;
+ case SND_SOC_DAIFMT_IB_IF:
+ SET_UNIPERIF_I2S_FMT_LR_POL_HIG(reader);
+ SET_UNIPERIF_I2S_FMT_SCLK_EDGE_FALLING(reader);
+ break;
+ }
+
+ /* Clear any pending interrupts */
+ SET_UNIPERIF_ITS_BCLR(reader, GET_UNIPERIF_ITS(reader));
+
+ SET_UNIPERIF_I2S_FMT_NO_OF_SAMPLES_TO_READ(reader, 0);
+
+ /* Set the interrupt mask */
+ SET_UNIPERIF_ITM_BSET_DMA_ERROR(reader);
+ SET_UNIPERIF_ITM_BSET_FIFO_ERROR(reader);
+ SET_UNIPERIF_ITM_BSET_MEM_BLK_READ(reader);
+
+ /* Enable underflow recovery interrupts */
+ if (reader->underflow_enabled) {
+ SET_UNIPERIF_ITM_BSET_UNDERFLOW_REC_DONE(reader);
+ SET_UNIPERIF_ITM_BSET_UNDERFLOW_REC_FAILED(reader);
+ }
+
+ /* Reset uniperipheral reader */
+ return sti_uniperiph_reset(reader);
+}
+
+static int uni_reader_start(struct uniperif *reader)
+{
+ /* The reader should be stopped */
+ if (reader->state != UNIPERIF_STATE_STOPPED) {
+ dev_err(reader->dev, "%s: invalid reader state\n", __func__);
+ return -EINVAL;
+ }
+
+ /* Enable reader interrupts (and clear possible stalled ones) */
+ SET_UNIPERIF_ITS_BCLR_FIFO_ERROR(reader);
+ SET_UNIPERIF_ITM_BSET_FIFO_ERROR(reader);
+
+ /* Launch the reader */
+ SET_UNIPERIF_CTRL_OPERATION_PCM_DATA(reader);
+
+ /* Update state to started */
+ reader->state = UNIPERIF_STATE_STARTED;
+ return 0;
+}
+
+static int uni_reader_stop(struct uniperif *reader)
+{
+ /* The reader should not be in stopped state */
+ if (reader->state == UNIPERIF_STATE_STOPPED) {
+ dev_err(reader->dev, "%s: invalid reader state\n", __func__);
+ return -EINVAL;
+ }
+
+ /* Turn the reader off */
+ SET_UNIPERIF_CTRL_OPERATION_OFF(reader);
+
+ /* Disable interrupts */
+ SET_UNIPERIF_ITM_BCLR(reader, GET_UNIPERIF_ITM(reader));
+
+ /* Update state to stopped and return */
+ reader->state = UNIPERIF_STATE_STOPPED;
+
+ return 0;
+}
+
+static int uni_reader_trigger(struct snd_pcm_substream *substream,
+ int cmd, struct snd_soc_dai *dai)
+{
+ struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai);
+ struct uniperif *reader = priv->dai_data.uni;
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ return uni_reader_start(reader);
+ case SNDRV_PCM_TRIGGER_STOP:
+ return uni_reader_stop(reader);
+ default:
+ return -EINVAL;
+ }
+}
+
+static int uni_reader_startup(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai);
+ struct uniperif *reader = priv->dai_data.uni;
+ unsigned long flags;
+ int ret;
+
+ spin_lock_irqsave(&reader->irq_lock, flags);
+ reader->substream = substream;
+ spin_unlock_irqrestore(&reader->irq_lock, flags);
+
+ if (!UNIPERIF_TYPE_IS_TDM(reader))
+ return 0;
+
+ /* refine hw constraint in tdm mode */
+ ret = snd_pcm_hw_rule_add(substream->runtime, 0,
+ SNDRV_PCM_HW_PARAM_CHANNELS,
+ sti_uniperiph_fix_tdm_chan,
+ reader, SNDRV_PCM_HW_PARAM_CHANNELS,
+ -1);
+ if (ret < 0)
+ return ret;
+
+ return snd_pcm_hw_rule_add(substream->runtime, 0,
+ SNDRV_PCM_HW_PARAM_FORMAT,
+ sti_uniperiph_fix_tdm_format,
+ reader, SNDRV_PCM_HW_PARAM_FORMAT,
+ -1);
+}
+
+static void uni_reader_shutdown(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai);
+ struct uniperif *reader = priv->dai_data.uni;
+ unsigned long flags;
+
+ spin_lock_irqsave(&reader->irq_lock, flags);
+ if (reader->state != UNIPERIF_STATE_STOPPED) {
+ /* Stop the reader */
+ uni_reader_stop(reader);
+ }
+ reader->substream = NULL;
+ spin_unlock_irqrestore(&reader->irq_lock, flags);
+}
+
+static const struct snd_soc_dai_ops uni_reader_dai_ops = {
+ .startup = uni_reader_startup,
+ .shutdown = uni_reader_shutdown,
+ .prepare = uni_reader_prepare,
+ .trigger = uni_reader_trigger,
+ .hw_params = sti_uniperiph_dai_hw_params,
+ .set_fmt = sti_uniperiph_dai_set_fmt,
+ .set_tdm_slot = sti_uniperiph_set_tdm_slot
+};
+
+int uni_reader_init(struct platform_device *pdev,
+ struct uniperif *reader)
+{
+ int ret = 0;
+
+ reader->dev = &pdev->dev;
+ reader->state = UNIPERIF_STATE_STOPPED;
+ reader->dai_ops = &uni_reader_dai_ops;
+
+ if (UNIPERIF_TYPE_IS_TDM(reader))
+ reader->hw = &uni_tdm_hw;
+ else
+ reader->hw = &uni_reader_pcm_hw;
+
+ ret = devm_request_irq(&pdev->dev, reader->irq,
+ uni_reader_irq_handler, IRQF_SHARED,
+ dev_name(&pdev->dev), reader);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "Failed to request IRQ\n");
+ return -EBUSY;
+ }
+
+ spin_lock_init(&reader->irq_lock);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(uni_reader_init);