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/atmel/atmel-classd.c | 637 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 637 insertions(+) create mode 100644 sound/soc/atmel/atmel-classd.c (limited to 'sound/soc/atmel/atmel-classd.c') diff --git a/sound/soc/atmel/atmel-classd.c b/sound/soc/atmel/atmel-classd.c new file mode 100644 index 000000000..87d6d6ed0 --- /dev/null +++ b/sound/soc/atmel/atmel-classd.c @@ -0,0 +1,637 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* Atmel ALSA SoC Audio Class D Amplifier (CLASSD) driver + * + * Copyright (C) 2015 Atmel + * + * Author: Songjun Wu + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include "atmel-classd.h" + +struct atmel_classd_pdata { + bool non_overlap_enable; + int non_overlap_time; + int pwm_type; + const char *card_name; +}; + +struct atmel_classd { + dma_addr_t phy_base; + struct regmap *regmap; + struct clk *pclk; + struct clk *gclk; + struct device *dev; + int irq; + const struct atmel_classd_pdata *pdata; +}; + +#ifdef CONFIG_OF +static const struct of_device_id atmel_classd_of_match[] = { + { + .compatible = "atmel,sama5d2-classd", + }, { + /* sentinel */ + } +}; +MODULE_DEVICE_TABLE(of, atmel_classd_of_match); + +static struct atmel_classd_pdata *atmel_classd_dt_init(struct device *dev) +{ + struct device_node *np = dev->of_node; + struct atmel_classd_pdata *pdata; + const char *pwm_type_s; + int ret; + + if (!np) { + dev_err(dev, "device node not found\n"); + return ERR_PTR(-EINVAL); + } + + pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); + if (!pdata) + return ERR_PTR(-ENOMEM); + + ret = of_property_read_string(np, "atmel,pwm-type", &pwm_type_s); + if ((ret == 0) && (strcmp(pwm_type_s, "diff") == 0)) + pdata->pwm_type = CLASSD_MR_PWMTYP_DIFF; + else + pdata->pwm_type = CLASSD_MR_PWMTYP_SINGLE; + + ret = of_property_read_u32(np, + "atmel,non-overlap-time", &pdata->non_overlap_time); + if (ret) + pdata->non_overlap_enable = false; + else + pdata->non_overlap_enable = true; + + ret = of_property_read_string(np, "atmel,model", &pdata->card_name); + if (ret) + pdata->card_name = "CLASSD"; + + return pdata; +} +#else +static inline struct atmel_classd_pdata * +atmel_classd_dt_init(struct device *dev) +{ + return ERR_PTR(-EINVAL); +} +#endif + +#define ATMEL_CLASSD_RATES (SNDRV_PCM_RATE_8000 \ + | SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 \ + | SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 \ + | SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 \ + | SNDRV_PCM_RATE_96000) + +static const struct snd_pcm_hardware atmel_classd_hw = { + .info = SNDRV_PCM_INFO_MMAP + | SNDRV_PCM_INFO_MMAP_VALID + | SNDRV_PCM_INFO_INTERLEAVED + | SNDRV_PCM_INFO_RESUME + | SNDRV_PCM_INFO_PAUSE, + .formats = (SNDRV_PCM_FMTBIT_S16_LE), + .rates = ATMEL_CLASSD_RATES, + .rate_min = 8000, + .rate_max = 96000, + .channels_min = 1, + .channels_max = 2, + .buffer_bytes_max = 64 * 1024, + .period_bytes_min = 256, + .period_bytes_max = 32 * 1024, + .periods_min = 2, + .periods_max = 256, +}; + +#define ATMEL_CLASSD_PREALLOC_BUF_SIZE (64 * 1024) + +/* cpu dai component */ +static int atmel_classd_cpu_dai_startup(struct snd_pcm_substream *substream, + struct snd_soc_dai *cpu_dai) +{ + struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); + struct atmel_classd *dd = snd_soc_card_get_drvdata(rtd->card); + int err; + + regmap_write(dd->regmap, CLASSD_THR, 0x0); + + err = clk_prepare_enable(dd->pclk); + if (err) + return err; + err = clk_prepare_enable(dd->gclk); + if (err) { + clk_disable_unprepare(dd->pclk); + return err; + } + return 0; +} + +/* platform */ +static int +atmel_classd_platform_configure_dma(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params, + struct dma_slave_config *slave_config) +{ + struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); + struct atmel_classd *dd = snd_soc_card_get_drvdata(rtd->card); + + if (params_physical_width(params) != 16) { + dev_err(dd->dev, + "only supports 16-bit audio data\n"); + return -EINVAL; + } + + if (params_channels(params) == 1) + slave_config->dst_addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES; + else + slave_config->dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; + + slave_config->direction = DMA_MEM_TO_DEV; + slave_config->dst_addr = dd->phy_base + CLASSD_THR; + slave_config->dst_maxburst = 1; + slave_config->src_maxburst = 1; + slave_config->device_fc = false; + + return 0; +} + +static const struct snd_dmaengine_pcm_config +atmel_classd_dmaengine_pcm_config = { + .prepare_slave_config = atmel_classd_platform_configure_dma, + .pcm_hardware = &atmel_classd_hw, + .prealloc_buffer_size = ATMEL_CLASSD_PREALLOC_BUF_SIZE, +}; + +/* codec */ +static const char * const mono_mode_text[] = { + "mix", "sat", "left", "right" +}; + +static SOC_ENUM_SINGLE_DECL(classd_mono_mode_enum, + CLASSD_INTPMR, CLASSD_INTPMR_MONO_MODE_SHIFT, + mono_mode_text); + +static const char * const eqcfg_text[] = { + "Treble-12dB", "Treble-6dB", + "Medium-8dB", "Medium-3dB", + "Bass-12dB", "Bass-6dB", + "0 dB", + "Bass+6dB", "Bass+12dB", + "Medium+3dB", "Medium+8dB", + "Treble+6dB", "Treble+12dB", +}; + +static const unsigned int eqcfg_value[] = { + CLASSD_INTPMR_EQCFG_T_CUT_12, CLASSD_INTPMR_EQCFG_T_CUT_6, + CLASSD_INTPMR_EQCFG_M_CUT_8, CLASSD_INTPMR_EQCFG_M_CUT_3, + CLASSD_INTPMR_EQCFG_B_CUT_12, CLASSD_INTPMR_EQCFG_B_CUT_6, + CLASSD_INTPMR_EQCFG_FLAT, + CLASSD_INTPMR_EQCFG_B_BOOST_6, CLASSD_INTPMR_EQCFG_B_BOOST_12, + CLASSD_INTPMR_EQCFG_M_BOOST_3, CLASSD_INTPMR_EQCFG_M_BOOST_8, + CLASSD_INTPMR_EQCFG_T_BOOST_6, CLASSD_INTPMR_EQCFG_T_BOOST_12, +}; + +static SOC_VALUE_ENUM_SINGLE_DECL(classd_eqcfg_enum, + CLASSD_INTPMR, CLASSD_INTPMR_EQCFG_SHIFT, 0xf, + eqcfg_text, eqcfg_value); + +static const DECLARE_TLV_DB_SCALE(classd_digital_tlv, -7800, 100, 1); + +static const struct snd_kcontrol_new atmel_classd_snd_controls[] = { +SOC_DOUBLE_TLV("Playback Volume", CLASSD_INTPMR, + CLASSD_INTPMR_ATTL_SHIFT, CLASSD_INTPMR_ATTR_SHIFT, + 78, 1, classd_digital_tlv), + +SOC_SINGLE("Deemphasis Switch", CLASSD_INTPMR, + CLASSD_INTPMR_DEEMP_SHIFT, 1, 0), + +SOC_SINGLE("Mono Switch", CLASSD_INTPMR, CLASSD_INTPMR_MONO_SHIFT, 1, 0), + +SOC_SINGLE("Swap Switch", CLASSD_INTPMR, CLASSD_INTPMR_SWAP_SHIFT, 1, 0), + +SOC_ENUM("Mono Mode", classd_mono_mode_enum), + +SOC_ENUM("EQ", classd_eqcfg_enum), +}; + +static const char * const pwm_type[] = { + "Single ended", "Differential" +}; + +static int atmel_classd_component_probe(struct snd_soc_component *component) +{ + struct snd_soc_card *card = snd_soc_component_get_drvdata(component); + struct atmel_classd *dd = snd_soc_card_get_drvdata(card); + const struct atmel_classd_pdata *pdata = dd->pdata; + u32 mask, val; + + mask = CLASSD_MR_PWMTYP_MASK; + val = pdata->pwm_type << CLASSD_MR_PWMTYP_SHIFT; + + mask |= CLASSD_MR_NON_OVERLAP_MASK; + if (pdata->non_overlap_enable) { + val |= (CLASSD_MR_NON_OVERLAP_EN + << CLASSD_MR_NON_OVERLAP_SHIFT); + + mask |= CLASSD_MR_NOVR_VAL_MASK; + switch (pdata->non_overlap_time) { + case 5: + val |= (CLASSD_MR_NOVR_VAL_5NS + << CLASSD_MR_NOVR_VAL_SHIFT); + break; + case 10: + val |= (CLASSD_MR_NOVR_VAL_10NS + << CLASSD_MR_NOVR_VAL_SHIFT); + break; + case 15: + val |= (CLASSD_MR_NOVR_VAL_15NS + << CLASSD_MR_NOVR_VAL_SHIFT); + break; + case 20: + val |= (CLASSD_MR_NOVR_VAL_20NS + << CLASSD_MR_NOVR_VAL_SHIFT); + break; + default: + val |= (CLASSD_MR_NOVR_VAL_10NS + << CLASSD_MR_NOVR_VAL_SHIFT); + dev_warn(component->dev, + "non-overlapping value %d is invalid, the default value 10 is specified\n", + pdata->non_overlap_time); + break; + } + } + + snd_soc_component_update_bits(component, CLASSD_MR, mask, val); + + dev_info(component->dev, + "PWM modulation type is %s, non-overlapping is %s\n", + pwm_type[pdata->pwm_type], + pdata->non_overlap_enable?"enabled":"disabled"); + + return 0; +} + +static int atmel_classd_component_resume(struct snd_soc_component *component) +{ + struct snd_soc_card *card = snd_soc_component_get_drvdata(component); + struct atmel_classd *dd = snd_soc_card_get_drvdata(card); + + return regcache_sync(dd->regmap); +} + +static int atmel_classd_cpu_dai_mute_stream(struct snd_soc_dai *cpu_dai, + int mute, int direction) +{ + struct snd_soc_component *component = cpu_dai->component; + u32 mask, val; + + mask = CLASSD_MR_LMUTE_MASK | CLASSD_MR_RMUTE_MASK; + + if (mute) + val = mask; + else + val = 0; + + snd_soc_component_update_bits(component, CLASSD_MR, mask, val); + + return 0; +} + +#define CLASSD_GCLK_RATE_11M2896_MPY_8 (112896 * 100 * 8) +#define CLASSD_GCLK_RATE_12M288_MPY_8 (12288 * 1000 * 8) + +static struct { + int rate; + int sample_rate; + int dsp_clk; + unsigned long gclk_rate; +} const sample_rates[] = { + { 8000, CLASSD_INTPMR_FRAME_8K, + CLASSD_INTPMR_DSP_CLK_FREQ_12M288, CLASSD_GCLK_RATE_12M288_MPY_8 }, + { 16000, CLASSD_INTPMR_FRAME_16K, + CLASSD_INTPMR_DSP_CLK_FREQ_12M288, CLASSD_GCLK_RATE_12M288_MPY_8 }, + { 32000, CLASSD_INTPMR_FRAME_32K, + CLASSD_INTPMR_DSP_CLK_FREQ_12M288, CLASSD_GCLK_RATE_12M288_MPY_8 }, + { 48000, CLASSD_INTPMR_FRAME_48K, + CLASSD_INTPMR_DSP_CLK_FREQ_12M288, CLASSD_GCLK_RATE_12M288_MPY_8 }, + { 96000, CLASSD_INTPMR_FRAME_96K, + CLASSD_INTPMR_DSP_CLK_FREQ_12M288, CLASSD_GCLK_RATE_12M288_MPY_8 }, + { 22050, CLASSD_INTPMR_FRAME_22K, + CLASSD_INTPMR_DSP_CLK_FREQ_11M2896, CLASSD_GCLK_RATE_11M2896_MPY_8 }, + { 44100, CLASSD_INTPMR_FRAME_44K, + CLASSD_INTPMR_DSP_CLK_FREQ_11M2896, CLASSD_GCLK_RATE_11M2896_MPY_8 }, + { 88200, CLASSD_INTPMR_FRAME_88K, + CLASSD_INTPMR_DSP_CLK_FREQ_11M2896, CLASSD_GCLK_RATE_11M2896_MPY_8 }, +}; + +static int +atmel_classd_cpu_dai_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params, + struct snd_soc_dai *cpu_dai) +{ + struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); + struct atmel_classd *dd = snd_soc_card_get_drvdata(rtd->card); + struct snd_soc_component *component = cpu_dai->component; + int fs; + int i, best, best_val, cur_val, ret; + u32 mask, val; + + fs = params_rate(params); + + best = 0; + best_val = abs(fs - sample_rates[0].rate); + for (i = 1; i < ARRAY_SIZE(sample_rates); i++) { + /* Closest match */ + cur_val = abs(fs - sample_rates[i].rate); + if (cur_val < best_val) { + best = i; + best_val = cur_val; + } + } + + dev_dbg(component->dev, + "Selected SAMPLE_RATE of %dHz, GCLK_RATE of %ldHz\n", + sample_rates[best].rate, sample_rates[best].gclk_rate); + + clk_disable_unprepare(dd->gclk); + + ret = clk_set_rate(dd->gclk, sample_rates[best].gclk_rate); + if (ret) + return ret; + + mask = CLASSD_INTPMR_DSP_CLK_FREQ_MASK | CLASSD_INTPMR_FRAME_MASK; + val = (sample_rates[best].dsp_clk << CLASSD_INTPMR_DSP_CLK_FREQ_SHIFT) + | (sample_rates[best].sample_rate << CLASSD_INTPMR_FRAME_SHIFT); + + snd_soc_component_update_bits(component, CLASSD_INTPMR, mask, val); + + return clk_prepare_enable(dd->gclk); +} + +static void +atmel_classd_cpu_dai_shutdown(struct snd_pcm_substream *substream, + struct snd_soc_dai *cpu_dai) +{ + struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); + struct atmel_classd *dd = snd_soc_card_get_drvdata(rtd->card); + + clk_disable_unprepare(dd->gclk); +} + +static int atmel_classd_cpu_dai_prepare(struct snd_pcm_substream *substream, + struct snd_soc_dai *cpu_dai) +{ + struct snd_soc_component *component = cpu_dai->component; + + snd_soc_component_update_bits(component, CLASSD_MR, + CLASSD_MR_LEN_MASK | CLASSD_MR_REN_MASK, + (CLASSD_MR_LEN_DIS << CLASSD_MR_LEN_SHIFT) + |(CLASSD_MR_REN_DIS << CLASSD_MR_REN_SHIFT)); + + return 0; +} + +static int atmel_classd_cpu_dai_trigger(struct snd_pcm_substream *substream, + int cmd, struct snd_soc_dai *cpu_dai) +{ + struct snd_soc_component *component = cpu_dai->component; + u32 mask, val; + + mask = CLASSD_MR_LEN_MASK | CLASSD_MR_REN_MASK; + + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + case SNDRV_PCM_TRIGGER_RESUME: + case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: + val = mask; + break; + case SNDRV_PCM_TRIGGER_STOP: + case SNDRV_PCM_TRIGGER_SUSPEND: + case SNDRV_PCM_TRIGGER_PAUSE_PUSH: + val = (CLASSD_MR_LEN_DIS << CLASSD_MR_LEN_SHIFT) + | (CLASSD_MR_REN_DIS << CLASSD_MR_REN_SHIFT); + break; + default: + return -EINVAL; + } + + snd_soc_component_update_bits(component, CLASSD_MR, mask, val); + + return 0; +} + +static const struct snd_soc_dai_ops atmel_classd_cpu_dai_ops = { + .startup = atmel_classd_cpu_dai_startup, + .shutdown = atmel_classd_cpu_dai_shutdown, + .mute_stream = atmel_classd_cpu_dai_mute_stream, + .hw_params = atmel_classd_cpu_dai_hw_params, + .prepare = atmel_classd_cpu_dai_prepare, + .trigger = atmel_classd_cpu_dai_trigger, + .no_capture_mute = 1, +}; + +static struct snd_soc_dai_driver atmel_classd_cpu_dai = { + .playback = { + .stream_name = "Playback", + .channels_min = 1, + .channels_max = 2, + .rates = ATMEL_CLASSD_RATES, + .formats = SNDRV_PCM_FMTBIT_S16_LE, + }, + .ops = &atmel_classd_cpu_dai_ops, +}; + +static const struct snd_soc_component_driver atmel_classd_cpu_dai_component = { + .name = "atmel-classd", + .probe = atmel_classd_component_probe, + .resume = atmel_classd_component_resume, + .controls = atmel_classd_snd_controls, + .num_controls = ARRAY_SIZE(atmel_classd_snd_controls), + .idle_bias_on = 1, + .use_pmdown_time = 1, + .legacy_dai_naming = 1, +}; + +/* ASoC sound card */ +static int atmel_classd_asoc_card_init(struct device *dev, + struct snd_soc_card *card) +{ + struct snd_soc_dai_link *dai_link; + struct atmel_classd *dd = snd_soc_card_get_drvdata(card); + struct snd_soc_dai_link_component *comp; + + dai_link = devm_kzalloc(dev, sizeof(*dai_link), GFP_KERNEL); + if (!dai_link) + return -ENOMEM; + + comp = devm_kzalloc(dev, 3 * sizeof(*comp), GFP_KERNEL); + if (!comp) + return -ENOMEM; + + dai_link->cpus = &comp[0]; + dai_link->codecs = &comp[1]; + dai_link->platforms = &comp[2]; + + dai_link->num_cpus = 1; + dai_link->num_codecs = 1; + dai_link->num_platforms = 1; + + dai_link->name = "CLASSD"; + dai_link->stream_name = "CLASSD PCM"; + dai_link->codecs->dai_name = "snd-soc-dummy-dai"; + dai_link->cpus->dai_name = dev_name(dev); + dai_link->codecs->name = "snd-soc-dummy"; + dai_link->platforms->name = dev_name(dev); + + card->dai_link = dai_link; + card->num_links = 1; + card->name = dd->pdata->card_name; + card->dev = dev; + + return 0; +}; + +/* regmap configuration */ +static const struct reg_default atmel_classd_reg_defaults[] = { + { CLASSD_INTPMR, 0x00301212 }, +}; + +#define ATMEL_CLASSD_REG_MAX 0xE4 +static const struct regmap_config atmel_classd_regmap_config = { + .reg_bits = 32, + .reg_stride = 4, + .val_bits = 32, + .max_register = ATMEL_CLASSD_REG_MAX, + + .cache_type = REGCACHE_FLAT, + .reg_defaults = atmel_classd_reg_defaults, + .num_reg_defaults = ARRAY_SIZE(atmel_classd_reg_defaults), +}; + +static int atmel_classd_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct atmel_classd *dd; + struct resource *res; + void __iomem *io_base; + const struct atmel_classd_pdata *pdata; + struct snd_soc_card *card; + int ret; + + pdata = dev_get_platdata(dev); + if (!pdata) { + pdata = atmel_classd_dt_init(dev); + if (IS_ERR(pdata)) + return PTR_ERR(pdata); + } + + dd = devm_kzalloc(dev, sizeof(*dd), GFP_KERNEL); + if (!dd) + return -ENOMEM; + + dd->pdata = pdata; + + dd->irq = platform_get_irq(pdev, 0); + if (dd->irq < 0) + return dd->irq; + + dd->pclk = devm_clk_get(dev, "pclk"); + if (IS_ERR(dd->pclk)) { + ret = PTR_ERR(dd->pclk); + dev_err(dev, "failed to get peripheral clock: %d\n", ret); + return ret; + } + + dd->gclk = devm_clk_get(dev, "gclk"); + if (IS_ERR(dd->gclk)) { + ret = PTR_ERR(dd->gclk); + dev_err(dev, "failed to get GCK clock: %d\n", ret); + return ret; + } + + io_base = devm_platform_get_and_ioremap_resource(pdev, 0, &res); + if (IS_ERR(io_base)) + return PTR_ERR(io_base); + + dd->phy_base = res->start; + dd->dev = dev; + + dd->regmap = devm_regmap_init_mmio(dev, io_base, + &atmel_classd_regmap_config); + if (IS_ERR(dd->regmap)) { + ret = PTR_ERR(dd->regmap); + dev_err(dev, "failed to init register map: %d\n", ret); + return ret; + } + + ret = devm_snd_soc_register_component(dev, + &atmel_classd_cpu_dai_component, + &atmel_classd_cpu_dai, 1); + if (ret) { + dev_err(dev, "could not register CPU DAI: %d\n", ret); + return ret; + } + + ret = devm_snd_dmaengine_pcm_register(dev, + &atmel_classd_dmaengine_pcm_config, + 0); + if (ret) { + dev_err(dev, "could not register platform: %d\n", ret); + return ret; + } + + /* register sound card */ + card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL); + if (!card) { + ret = -ENOMEM; + goto unregister_codec; + } + + snd_soc_card_set_drvdata(card, dd); + + ret = atmel_classd_asoc_card_init(dev, card); + if (ret) { + dev_err(dev, "failed to init sound card\n"); + goto unregister_codec; + } + + ret = devm_snd_soc_register_card(dev, card); + if (ret) { + dev_err(dev, "failed to register sound card: %d\n", ret); + goto unregister_codec; + } + + return 0; + +unregister_codec: + return ret; +} + +static int atmel_classd_remove(struct platform_device *pdev) +{ + return 0; +} + +static struct platform_driver atmel_classd_driver = { + .driver = { + .name = "atmel-classd", + .of_match_table = of_match_ptr(atmel_classd_of_match), + .pm = &snd_soc_pm_ops, + }, + .probe = atmel_classd_probe, + .remove = atmel_classd_remove, +}; +module_platform_driver(atmel_classd_driver); + +MODULE_DESCRIPTION("Atmel ClassD driver under ALSA SoC architecture"); +MODULE_AUTHOR("Songjun Wu "); +MODULE_LICENSE("GPL"); -- cgit v1.2.3