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(). ... --- drivers/media/pci/cx23885/cx23885-alsa.c | 594 +++++++++++++++++++++++++++++++ 1 file changed, 594 insertions(+) create mode 100644 drivers/media/pci/cx23885/cx23885-alsa.c (limited to 'drivers/media/pci/cx23885/cx23885-alsa.c') diff --git a/drivers/media/pci/cx23885/cx23885-alsa.c b/drivers/media/pci/cx23885/cx23885-alsa.c new file mode 100644 index 000000000..25dc8d4dc --- /dev/null +++ b/drivers/media/pci/cx23885/cx23885-alsa.c @@ -0,0 +1,594 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * + * Support for CX23885 analog audio capture + * + * (c) 2008 Mijhail Moreyra + * Adapted from cx88-alsa.c + * (c) 2009 Steven Toth + */ + +#include "cx23885.h" +#include "cx23885-reg.h" + +#include +#include +#include +#include +#include +#include +#include + +#include + +#include +#include +#include +#include +#include + +#include + +#define AUDIO_SRAM_CHANNEL SRAM_CH07 + +#define dprintk(level, fmt, arg...) do { \ + if (audio_debug + 1 > level) \ + printk(KERN_DEBUG pr_fmt("%s: alsa: " fmt), \ + chip->dev->name, ##arg); \ +} while(0) + +/**************************************************************************** + Module global static vars + ****************************************************************************/ + +static unsigned int disable_analog_audio; +module_param(disable_analog_audio, int, 0644); +MODULE_PARM_DESC(disable_analog_audio, "disable analog audio ALSA driver"); + +static unsigned int audio_debug; +module_param(audio_debug, int, 0644); +MODULE_PARM_DESC(audio_debug, "enable debug messages [analog audio]"); + +/**************************************************************************** + Board specific functions + ****************************************************************************/ + +/* Constants taken from cx88-reg.h */ +#define AUD_INT_DN_RISCI1 (1 << 0) +#define AUD_INT_UP_RISCI1 (1 << 1) +#define AUD_INT_RDS_DN_RISCI1 (1 << 2) +#define AUD_INT_DN_RISCI2 (1 << 4) /* yes, 3 is skipped */ +#define AUD_INT_UP_RISCI2 (1 << 5) +#define AUD_INT_RDS_DN_RISCI2 (1 << 6) +#define AUD_INT_DN_SYNC (1 << 12) +#define AUD_INT_UP_SYNC (1 << 13) +#define AUD_INT_RDS_DN_SYNC (1 << 14) +#define AUD_INT_OPC_ERR (1 << 16) +#define AUD_INT_BER_IRQ (1 << 20) +#define AUD_INT_MCHG_IRQ (1 << 21) +#define GP_COUNT_CONTROL_RESET 0x3 + +static int cx23885_alsa_dma_init(struct cx23885_audio_dev *chip, + unsigned long nr_pages) +{ + struct cx23885_audio_buffer *buf = chip->buf; + struct page *pg; + int i; + + buf->vaddr = vmalloc_32(nr_pages << PAGE_SHIFT); + if (NULL == buf->vaddr) { + dprintk(1, "vmalloc_32(%lu pages) failed\n", nr_pages); + return -ENOMEM; + } + + dprintk(1, "vmalloc is at addr %p, size=%lu\n", + buf->vaddr, nr_pages << PAGE_SHIFT); + + memset(buf->vaddr, 0, nr_pages << PAGE_SHIFT); + buf->nr_pages = nr_pages; + + buf->sglist = vzalloc(array_size(sizeof(*buf->sglist), buf->nr_pages)); + if (NULL == buf->sglist) + goto vzalloc_err; + + sg_init_table(buf->sglist, buf->nr_pages); + for (i = 0; i < buf->nr_pages; i++) { + pg = vmalloc_to_page(buf->vaddr + i * PAGE_SIZE); + if (NULL == pg) + goto vmalloc_to_page_err; + sg_set_page(&buf->sglist[i], pg, PAGE_SIZE, 0); + } + return 0; + +vmalloc_to_page_err: + vfree(buf->sglist); + buf->sglist = NULL; +vzalloc_err: + vfree(buf->vaddr); + buf->vaddr = NULL; + return -ENOMEM; +} + +static int cx23885_alsa_dma_map(struct cx23885_audio_dev *dev) +{ + struct cx23885_audio_buffer *buf = dev->buf; + + buf->sglen = dma_map_sg(&dev->pci->dev, buf->sglist, + buf->nr_pages, DMA_FROM_DEVICE); + + if (0 == buf->sglen) { + pr_warn("%s: cx23885_alsa_map_sg failed\n", __func__); + return -ENOMEM; + } + return 0; +} + +static int cx23885_alsa_dma_unmap(struct cx23885_audio_dev *dev) +{ + struct cx23885_audio_buffer *buf = dev->buf; + + if (!buf->sglen) + return 0; + + dma_unmap_sg(&dev->pci->dev, buf->sglist, buf->nr_pages, DMA_FROM_DEVICE); + buf->sglen = 0; + return 0; +} + +static int cx23885_alsa_dma_free(struct cx23885_audio_buffer *buf) +{ + vfree(buf->sglist); + buf->sglist = NULL; + vfree(buf->vaddr); + buf->vaddr = NULL; + return 0; +} + +/* + * BOARD Specific: Sets audio DMA + */ + +static int cx23885_start_audio_dma(struct cx23885_audio_dev *chip) +{ + struct cx23885_audio_buffer *buf = chip->buf; + struct cx23885_dev *dev = chip->dev; + struct sram_channel *audio_ch = + &dev->sram_channels[AUDIO_SRAM_CHANNEL]; + + dprintk(1, "%s()\n", __func__); + + /* Make sure RISC/FIFO are off before changing FIFO/RISC settings */ + cx_clear(AUD_INT_DMA_CTL, 0x11); + + /* setup fifo + format - out channel */ + cx23885_sram_channel_setup(chip->dev, audio_ch, buf->bpl, + buf->risc.dma); + + /* sets bpl size */ + cx_write(AUD_INT_A_LNGTH, buf->bpl); + + /* This is required to get good audio (1 seems to be ok) */ + cx_write(AUD_INT_A_MODE, 1); + + /* reset counter */ + cx_write(AUD_INT_A_GPCNT_CTL, GP_COUNT_CONTROL_RESET); + atomic_set(&chip->count, 0); + + dprintk(1, "Start audio DMA, %d B/line, %d lines/FIFO, %d periods, %d byte buffer\n", + buf->bpl, cx_read(audio_ch->cmds_start+12)>>1, + chip->num_periods, buf->bpl * chip->num_periods); + + /* Enables corresponding bits at AUD_INT_STAT */ + cx_write(AUDIO_INT_INT_MSK, AUD_INT_OPC_ERR | AUD_INT_DN_SYNC | + AUD_INT_DN_RISCI1); + + /* Clean any pending interrupt bits already set */ + cx_write(AUDIO_INT_INT_STAT, ~0); + + /* enable audio irqs */ + cx_set(PCI_INT_MSK, chip->dev->pci_irqmask | PCI_MSK_AUD_INT); + + /* start dma */ + cx_set(DEV_CNTRL2, (1<<5)); /* Enables Risc Processor */ + cx_set(AUD_INT_DMA_CTL, 0x11); /* audio downstream FIFO and + RISC enable */ + if (audio_debug) + cx23885_sram_channel_dump(chip->dev, audio_ch); + + return 0; +} + +/* + * BOARD Specific: Resets audio DMA + */ +static int cx23885_stop_audio_dma(struct cx23885_audio_dev *chip) +{ + struct cx23885_dev *dev = chip->dev; + dprintk(1, "Stopping audio DMA\n"); + + /* stop dma */ + cx_clear(AUD_INT_DMA_CTL, 0x11); + + /* disable irqs */ + cx_clear(PCI_INT_MSK, PCI_MSK_AUD_INT); + cx_clear(AUDIO_INT_INT_MSK, AUD_INT_OPC_ERR | AUD_INT_DN_SYNC | + AUD_INT_DN_RISCI1); + + if (audio_debug) + cx23885_sram_channel_dump(chip->dev, + &dev->sram_channels[AUDIO_SRAM_CHANNEL]); + + return 0; +} + +/* + * BOARD Specific: Handles audio IRQ + */ +int cx23885_audio_irq(struct cx23885_dev *dev, u32 status, u32 mask) +{ + struct cx23885_audio_dev *chip = dev->audio_dev; + + if (0 == (status & mask)) + return 0; + + cx_write(AUDIO_INT_INT_STAT, status); + + /* risc op code error */ + if (status & AUD_INT_OPC_ERR) { + pr_warn("%s/1: Audio risc op code error\n", + dev->name); + cx_clear(AUD_INT_DMA_CTL, 0x11); + cx23885_sram_channel_dump(dev, + &dev->sram_channels[AUDIO_SRAM_CHANNEL]); + } + if (status & AUD_INT_DN_SYNC) { + dprintk(1, "Downstream sync error\n"); + cx_write(AUD_INT_A_GPCNT_CTL, GP_COUNT_CONTROL_RESET); + return 1; + } + /* risc1 downstream */ + if (status & AUD_INT_DN_RISCI1) { + atomic_set(&chip->count, cx_read(AUD_INT_A_GPCNT)); + snd_pcm_period_elapsed(chip->substream); + } + /* FIXME: Any other status should deserve a special handling? */ + + return 1; +} + +static int dsp_buffer_free(struct cx23885_audio_dev *chip) +{ + struct cx23885_riscmem *risc; + + BUG_ON(!chip->dma_size); + + dprintk(2, "Freeing buffer\n"); + cx23885_alsa_dma_unmap(chip); + cx23885_alsa_dma_free(chip->buf); + risc = &chip->buf->risc; + dma_free_coherent(&chip->pci->dev, risc->size, risc->cpu, risc->dma); + kfree(chip->buf); + + chip->buf = NULL; + chip->dma_size = 0; + + return 0; +} + +/**************************************************************************** + ALSA PCM Interface + ****************************************************************************/ + +/* + * Digital hardware definition + */ +#define DEFAULT_FIFO_SIZE 4096 + +static const struct snd_pcm_hardware snd_cx23885_digital_hw = { + .info = SNDRV_PCM_INFO_MMAP | + SNDRV_PCM_INFO_INTERLEAVED | + SNDRV_PCM_INFO_BLOCK_TRANSFER | + SNDRV_PCM_INFO_MMAP_VALID, + .formats = SNDRV_PCM_FMTBIT_S16_LE, + + .rates = SNDRV_PCM_RATE_48000, + .rate_min = 48000, + .rate_max = 48000, + .channels_min = 2, + .channels_max = 2, + /* Analog audio output will be full of clicks and pops if there + are not exactly four lines in the SRAM FIFO buffer. */ + .period_bytes_min = DEFAULT_FIFO_SIZE/4, + .period_bytes_max = DEFAULT_FIFO_SIZE/4, + .periods_min = 1, + .periods_max = 1024, + .buffer_bytes_max = (1024*1024), +}; + +/* + * audio pcm capture open callback + */ +static int snd_cx23885_pcm_open(struct snd_pcm_substream *substream) +{ + struct cx23885_audio_dev *chip = snd_pcm_substream_chip(substream); + struct snd_pcm_runtime *runtime = substream->runtime; + int err; + + if (!chip) { + pr_err("BUG: cx23885 can't find device struct. Can't proceed with open\n"); + return -ENODEV; + } + + err = snd_pcm_hw_constraint_pow2(runtime, 0, + SNDRV_PCM_HW_PARAM_PERIODS); + if (err < 0) + goto _error; + + chip->substream = substream; + + runtime->hw = snd_cx23885_digital_hw; + + if (chip->dev->sram_channels[AUDIO_SRAM_CHANNEL].fifo_size != + DEFAULT_FIFO_SIZE) { + unsigned int bpl = chip->dev-> + sram_channels[AUDIO_SRAM_CHANNEL].fifo_size / 4; + bpl &= ~7; /* must be multiple of 8 */ + runtime->hw.period_bytes_min = bpl; + runtime->hw.period_bytes_max = bpl; + } + + return 0; +_error: + dprintk(1, "Error opening PCM!\n"); + return err; +} + +/* + * audio close callback + */ +static int snd_cx23885_close(struct snd_pcm_substream *substream) +{ + return 0; +} + + +/* + * hw_params callback + */ +static int snd_cx23885_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *hw_params) +{ + struct cx23885_audio_dev *chip = snd_pcm_substream_chip(substream); + struct cx23885_audio_buffer *buf; + int ret; + + if (substream->runtime->dma_area) { + dsp_buffer_free(chip); + substream->runtime->dma_area = NULL; + } + + chip->period_size = params_period_bytes(hw_params); + chip->num_periods = params_periods(hw_params); + chip->dma_size = chip->period_size * params_periods(hw_params); + + BUG_ON(!chip->dma_size); + BUG_ON(chip->num_periods & (chip->num_periods-1)); + + buf = kzalloc(sizeof(*buf), GFP_KERNEL); + if (NULL == buf) + return -ENOMEM; + + buf->bpl = chip->period_size; + chip->buf = buf; + + ret = cx23885_alsa_dma_init(chip, + (PAGE_ALIGN(chip->dma_size) >> PAGE_SHIFT)); + if (ret < 0) + goto error; + + ret = cx23885_alsa_dma_map(chip); + if (ret < 0) + goto error; + + ret = cx23885_risc_databuffer(chip->pci, &buf->risc, buf->sglist, + chip->period_size, chip->num_periods, 1); + if (ret < 0) + goto error; + + /* Loop back to start of program */ + buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP|RISC_IRQ1|RISC_CNT_INC); + buf->risc.jmp[1] = cpu_to_le32(buf->risc.dma); + buf->risc.jmp[2] = cpu_to_le32(0); /* bits 63-32 */ + + substream->runtime->dma_area = chip->buf->vaddr; + substream->runtime->dma_bytes = chip->dma_size; + substream->runtime->dma_addr = 0; + + return 0; + +error: + kfree(buf); + chip->buf = NULL; + return ret; +} + +/* + * hw free callback + */ +static int snd_cx23885_hw_free(struct snd_pcm_substream *substream) +{ + + struct cx23885_audio_dev *chip = snd_pcm_substream_chip(substream); + + if (substream->runtime->dma_area) { + dsp_buffer_free(chip); + substream->runtime->dma_area = NULL; + } + + return 0; +} + +/* + * prepare callback + */ +static int snd_cx23885_prepare(struct snd_pcm_substream *substream) +{ + return 0; +} + +/* + * trigger callback + */ +static int snd_cx23885_card_trigger(struct snd_pcm_substream *substream, + int cmd) +{ + struct cx23885_audio_dev *chip = snd_pcm_substream_chip(substream); + int err; + + /* Local interrupts are already disabled by ALSA */ + spin_lock(&chip->lock); + + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + err = cx23885_start_audio_dma(chip); + break; + case SNDRV_PCM_TRIGGER_STOP: + err = cx23885_stop_audio_dma(chip); + break; + default: + err = -EINVAL; + break; + } + + spin_unlock(&chip->lock); + + return err; +} + +/* + * pointer callback + */ +static snd_pcm_uframes_t snd_cx23885_pointer( + struct snd_pcm_substream *substream) +{ + struct cx23885_audio_dev *chip = snd_pcm_substream_chip(substream); + struct snd_pcm_runtime *runtime = substream->runtime; + u16 count; + + count = atomic_read(&chip->count); + + return runtime->period_size * (count & (runtime->periods-1)); +} + +/* + * page callback (needed for mmap) + */ +static struct page *snd_cx23885_page(struct snd_pcm_substream *substream, + unsigned long offset) +{ + void *pageptr = substream->runtime->dma_area + offset; + return vmalloc_to_page(pageptr); +} + +/* + * operators + */ +static const struct snd_pcm_ops snd_cx23885_pcm_ops = { + .open = snd_cx23885_pcm_open, + .close = snd_cx23885_close, + .hw_params = snd_cx23885_hw_params, + .hw_free = snd_cx23885_hw_free, + .prepare = snd_cx23885_prepare, + .trigger = snd_cx23885_card_trigger, + .pointer = snd_cx23885_pointer, + .page = snd_cx23885_page, +}; + +/* + * create a PCM device + */ +static int snd_cx23885_pcm(struct cx23885_audio_dev *chip, int device, + char *name) +{ + int err; + struct snd_pcm *pcm; + + err = snd_pcm_new(chip->card, name, device, 0, 1, &pcm); + if (err < 0) + return err; + pcm->private_data = chip; + strscpy(pcm->name, name, sizeof(pcm->name)); + snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_cx23885_pcm_ops); + + return 0; +} + +/**************************************************************************** + Basic Flow for Sound Devices + ****************************************************************************/ + +/* + * Alsa Constructor - Component probe + */ + +struct cx23885_audio_dev *cx23885_audio_register(struct cx23885_dev *dev) +{ + struct snd_card *card; + struct cx23885_audio_dev *chip; + int err; + + if (disable_analog_audio) + return NULL; + + if (dev->sram_channels[AUDIO_SRAM_CHANNEL].cmds_start == 0) { + pr_warn("%s(): Missing SRAM channel configuration for analog TV Audio\n", + __func__); + return NULL; + } + + err = snd_card_new(&dev->pci->dev, + SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1, + THIS_MODULE, sizeof(struct cx23885_audio_dev), &card); + if (err < 0) + goto error_msg; + + chip = (struct cx23885_audio_dev *) card->private_data; + chip->dev = dev; + chip->pci = dev->pci; + chip->card = card; + spin_lock_init(&chip->lock); + + err = snd_cx23885_pcm(chip, 0, "CX23885 Digital"); + if (err < 0) + goto error; + + strscpy(card->driver, "CX23885", sizeof(card->driver)); + sprintf(card->shortname, "Conexant CX23885"); + sprintf(card->longname, "%s at %s", card->shortname, dev->name); + + err = snd_card_register(card); + if (err < 0) + goto error; + + dprintk(0, "registered ALSA audio device\n"); + + return chip; + +error: + snd_card_free(card); +error_msg: + pr_err("%s(): Failed to register analog audio adapter\n", + __func__); + + return NULL; +} + +/* + * ALSA destructor + */ +void cx23885_audio_unregister(struct cx23885_dev *dev) +{ + struct cx23885_audio_dev *chip = dev->audio_dev; + + snd_card_free(chip->card); +} -- cgit v1.2.3