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/au1x/psc-ac97.c | 499 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 499 insertions(+) create mode 100644 sound/soc/au1x/psc-ac97.c (limited to 'sound/soc/au1x/psc-ac97.c') diff --git a/sound/soc/au1x/psc-ac97.c b/sound/soc/au1x/psc-ac97.c new file mode 100644 index 000000000..b536394b9 --- /dev/null +++ b/sound/soc/au1x/psc-ac97.c @@ -0,0 +1,499 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Au12x0/Au1550 PSC ALSA ASoC audio support. + * + * (c) 2007-2009 MSC Vertriebsges.m.b.H., + * Manuel Lauss + * + * Au1xxx-PSC AC97 glue. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "psc.h" + +/* how often to retry failed codec register reads/writes */ +#define AC97_RW_RETRIES 5 + +#define AC97_DIR \ + (SND_SOC_DAIDIR_PLAYBACK | SND_SOC_DAIDIR_CAPTURE) + +#define AC97_RATES \ + SNDRV_PCM_RATE_8000_48000 + +#define AC97_FMTS \ + (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3BE) + +#define AC97PCR_START(stype) \ + ((stype) == SNDRV_PCM_STREAM_PLAYBACK ? PSC_AC97PCR_TS : PSC_AC97PCR_RS) +#define AC97PCR_STOP(stype) \ + ((stype) == SNDRV_PCM_STREAM_PLAYBACK ? PSC_AC97PCR_TP : PSC_AC97PCR_RP) +#define AC97PCR_CLRFIFO(stype) \ + ((stype) == SNDRV_PCM_STREAM_PLAYBACK ? PSC_AC97PCR_TC : PSC_AC97PCR_RC) + +#define AC97STAT_BUSY(stype) \ + ((stype) == SNDRV_PCM_STREAM_PLAYBACK ? PSC_AC97STAT_TB : PSC_AC97STAT_RB) + +/* instance data. There can be only one, MacLeod!!!! */ +static struct au1xpsc_audio_data *au1xpsc_ac97_workdata; + +#if 0 + +/* this could theoretically work, but ac97->bus->card->private_data can be NULL + * when snd_ac97_mixer() is called; I don't know if the rest further down the + * chain are always valid either. + */ +static inline struct au1xpsc_audio_data *ac97_to_pscdata(struct snd_ac97 *x) +{ + struct snd_soc_card *c = x->bus->card->private_data; + return snd_soc_dai_get_drvdata(c->asoc_rtd_to_cpu(rtd, 0)); +} + +#else + +#define ac97_to_pscdata(x) au1xpsc_ac97_workdata + +#endif + +/* AC97 controller reads codec register */ +static unsigned short au1xpsc_ac97_read(struct snd_ac97 *ac97, + unsigned short reg) +{ + struct au1xpsc_audio_data *pscdata = ac97_to_pscdata(ac97); + unsigned short retry, tmo; + unsigned long data; + + __raw_writel(PSC_AC97EVNT_CD, AC97_EVNT(pscdata)); + wmb(); /* drain writebuffer */ + + retry = AC97_RW_RETRIES; + do { + mutex_lock(&pscdata->lock); + + __raw_writel(PSC_AC97CDC_RD | PSC_AC97CDC_INDX(reg), + AC97_CDC(pscdata)); + wmb(); /* drain writebuffer */ + + tmo = 20; + do { + udelay(21); + if (__raw_readl(AC97_EVNT(pscdata)) & PSC_AC97EVNT_CD) + break; + } while (--tmo); + + data = __raw_readl(AC97_CDC(pscdata)); + + __raw_writel(PSC_AC97EVNT_CD, AC97_EVNT(pscdata)); + wmb(); /* drain writebuffer */ + + mutex_unlock(&pscdata->lock); + + if (reg != ((data >> 16) & 0x7f)) + tmo = 1; /* wrong register, try again */ + + } while (--retry && !tmo); + + return retry ? data & 0xffff : 0xffff; +} + +/* AC97 controller writes to codec register */ +static void au1xpsc_ac97_write(struct snd_ac97 *ac97, unsigned short reg, + unsigned short val) +{ + struct au1xpsc_audio_data *pscdata = ac97_to_pscdata(ac97); + unsigned int tmo, retry; + + __raw_writel(PSC_AC97EVNT_CD, AC97_EVNT(pscdata)); + wmb(); /* drain writebuffer */ + + retry = AC97_RW_RETRIES; + do { + mutex_lock(&pscdata->lock); + + __raw_writel(PSC_AC97CDC_INDX(reg) | (val & 0xffff), + AC97_CDC(pscdata)); + wmb(); /* drain writebuffer */ + + tmo = 20; + do { + udelay(21); + if (__raw_readl(AC97_EVNT(pscdata)) & PSC_AC97EVNT_CD) + break; + } while (--tmo); + + __raw_writel(PSC_AC97EVNT_CD, AC97_EVNT(pscdata)); + wmb(); /* drain writebuffer */ + + mutex_unlock(&pscdata->lock); + } while (--retry && !tmo); +} + +/* AC97 controller asserts a warm reset */ +static void au1xpsc_ac97_warm_reset(struct snd_ac97 *ac97) +{ + struct au1xpsc_audio_data *pscdata = ac97_to_pscdata(ac97); + + __raw_writel(PSC_AC97RST_SNC, AC97_RST(pscdata)); + wmb(); /* drain writebuffer */ + msleep(10); + __raw_writel(0, AC97_RST(pscdata)); + wmb(); /* drain writebuffer */ +} + +static void au1xpsc_ac97_cold_reset(struct snd_ac97 *ac97) +{ + struct au1xpsc_audio_data *pscdata = ac97_to_pscdata(ac97); + int i; + + /* disable PSC during cold reset */ + __raw_writel(0, AC97_CFG(au1xpsc_ac97_workdata)); + wmb(); /* drain writebuffer */ + __raw_writel(PSC_CTRL_DISABLE, PSC_CTRL(pscdata)); + wmb(); /* drain writebuffer */ + + /* issue cold reset */ + __raw_writel(PSC_AC97RST_RST, AC97_RST(pscdata)); + wmb(); /* drain writebuffer */ + msleep(500); + __raw_writel(0, AC97_RST(pscdata)); + wmb(); /* drain writebuffer */ + + /* enable PSC */ + __raw_writel(PSC_CTRL_ENABLE, PSC_CTRL(pscdata)); + wmb(); /* drain writebuffer */ + + /* wait for PSC to indicate it's ready */ + i = 1000; + while (!((__raw_readl(AC97_STAT(pscdata)) & PSC_AC97STAT_SR)) && (--i)) + msleep(1); + + if (i == 0) { + printk(KERN_ERR "au1xpsc-ac97: PSC not ready!\n"); + return; + } + + /* enable the ac97 function */ + __raw_writel(pscdata->cfg | PSC_AC97CFG_DE_ENABLE, AC97_CFG(pscdata)); + wmb(); /* drain writebuffer */ + + /* wait for AC97 core to become ready */ + i = 1000; + while (!((__raw_readl(AC97_STAT(pscdata)) & PSC_AC97STAT_DR)) && (--i)) + msleep(1); + if (i == 0) + printk(KERN_ERR "au1xpsc-ac97: AC97 ctrl not ready\n"); +} + +/* AC97 controller operations */ +static struct snd_ac97_bus_ops psc_ac97_ops = { + .read = au1xpsc_ac97_read, + .write = au1xpsc_ac97_write, + .reset = au1xpsc_ac97_cold_reset, + .warm_reset = au1xpsc_ac97_warm_reset, +}; + +static int au1xpsc_ac97_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params, + struct snd_soc_dai *dai) +{ + struct au1xpsc_audio_data *pscdata = snd_soc_dai_get_drvdata(dai); + unsigned long r, ro, stat; + int chans, t, stype = substream->stream; + + chans = params_channels(params); + + r = ro = __raw_readl(AC97_CFG(pscdata)); + stat = __raw_readl(AC97_STAT(pscdata)); + + /* already active? */ + if (stat & (PSC_AC97STAT_TB | PSC_AC97STAT_RB)) { + /* reject parameters not currently set up */ + if ((PSC_AC97CFG_GET_LEN(r) != params->msbits) || + (pscdata->rate != params_rate(params))) + return -EINVAL; + } else { + + /* set sample bitdepth: REG[24:21]=(BITS-2)/2 */ + r &= ~PSC_AC97CFG_LEN_MASK; + r |= PSC_AC97CFG_SET_LEN(params->msbits); + + /* channels: enable slots for front L/R channel */ + if (stype == SNDRV_PCM_STREAM_PLAYBACK) { + r &= ~PSC_AC97CFG_TXSLOT_MASK; + r |= PSC_AC97CFG_TXSLOT_ENA(3); + r |= PSC_AC97CFG_TXSLOT_ENA(4); + } else { + r &= ~PSC_AC97CFG_RXSLOT_MASK; + r |= PSC_AC97CFG_RXSLOT_ENA(3); + r |= PSC_AC97CFG_RXSLOT_ENA(4); + } + + /* do we need to poke the hardware? */ + if (!(r ^ ro)) + goto out; + + /* ac97 engine is about to be disabled */ + mutex_lock(&pscdata->lock); + + /* disable AC97 device controller first... */ + __raw_writel(r & ~PSC_AC97CFG_DE_ENABLE, AC97_CFG(pscdata)); + wmb(); /* drain writebuffer */ + + /* ...wait for it... */ + t = 100; + while ((__raw_readl(AC97_STAT(pscdata)) & PSC_AC97STAT_DR) && --t) + msleep(1); + + if (!t) + printk(KERN_ERR "PSC-AC97: can't disable!\n"); + + /* ...write config... */ + __raw_writel(r, AC97_CFG(pscdata)); + wmb(); /* drain writebuffer */ + + /* ...enable the AC97 controller again... */ + __raw_writel(r | PSC_AC97CFG_DE_ENABLE, AC97_CFG(pscdata)); + wmb(); /* drain writebuffer */ + + /* ...and wait for ready bit */ + t = 100; + while ((!(__raw_readl(AC97_STAT(pscdata)) & PSC_AC97STAT_DR)) && --t) + msleep(1); + + if (!t) + printk(KERN_ERR "PSC-AC97: can't enable!\n"); + + mutex_unlock(&pscdata->lock); + + pscdata->cfg = r; + pscdata->rate = params_rate(params); + } + +out: + return 0; +} + +static int au1xpsc_ac97_trigger(struct snd_pcm_substream *substream, + int cmd, struct snd_soc_dai *dai) +{ + struct au1xpsc_audio_data *pscdata = snd_soc_dai_get_drvdata(dai); + int ret, stype = substream->stream; + + ret = 0; + + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + case SNDRV_PCM_TRIGGER_RESUME: + __raw_writel(AC97PCR_CLRFIFO(stype), AC97_PCR(pscdata)); + wmb(); /* drain writebuffer */ + __raw_writel(AC97PCR_START(stype), AC97_PCR(pscdata)); + wmb(); /* drain writebuffer */ + break; + case SNDRV_PCM_TRIGGER_STOP: + case SNDRV_PCM_TRIGGER_SUSPEND: + __raw_writel(AC97PCR_STOP(stype), AC97_PCR(pscdata)); + wmb(); /* drain writebuffer */ + + while (__raw_readl(AC97_STAT(pscdata)) & AC97STAT_BUSY(stype)) + asm volatile ("nop"); + + __raw_writel(AC97PCR_CLRFIFO(stype), AC97_PCR(pscdata)); + wmb(); /* drain writebuffer */ + + break; + default: + ret = -EINVAL; + } + return ret; +} + +static int au1xpsc_ac97_startup(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + struct au1xpsc_audio_data *pscdata = snd_soc_dai_get_drvdata(dai); + snd_soc_dai_set_dma_data(dai, substream, &pscdata->dmaids[0]); + return 0; +} + +static int au1xpsc_ac97_probe(struct snd_soc_dai *dai) +{ + return au1xpsc_ac97_workdata ? 0 : -ENODEV; +} + +static const struct snd_soc_dai_ops au1xpsc_ac97_dai_ops = { + .startup = au1xpsc_ac97_startup, + .trigger = au1xpsc_ac97_trigger, + .hw_params = au1xpsc_ac97_hw_params, +}; + +static const struct snd_soc_dai_driver au1xpsc_ac97_dai_template = { + .probe = au1xpsc_ac97_probe, + .playback = { + .rates = AC97_RATES, + .formats = AC97_FMTS, + .channels_min = 2, + .channels_max = 2, + }, + .capture = { + .rates = AC97_RATES, + .formats = AC97_FMTS, + .channels_min = 2, + .channels_max = 2, + }, + .ops = &au1xpsc_ac97_dai_ops, +}; + +static const struct snd_soc_component_driver au1xpsc_ac97_component = { + .name = "au1xpsc-ac97", + .legacy_dai_naming = 1, +}; + +static int au1xpsc_ac97_drvprobe(struct platform_device *pdev) +{ + int ret; + struct resource *dmares; + unsigned long sel; + struct au1xpsc_audio_data *wd; + + wd = devm_kzalloc(&pdev->dev, sizeof(struct au1xpsc_audio_data), + GFP_KERNEL); + if (!wd) + return -ENOMEM; + + mutex_init(&wd->lock); + + wd->mmio = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(wd->mmio)) + return PTR_ERR(wd->mmio); + + dmares = platform_get_resource(pdev, IORESOURCE_DMA, 0); + if (!dmares) + return -EBUSY; + wd->dmaids[SNDRV_PCM_STREAM_PLAYBACK] = dmares->start; + + dmares = platform_get_resource(pdev, IORESOURCE_DMA, 1); + if (!dmares) + return -EBUSY; + wd->dmaids[SNDRV_PCM_STREAM_CAPTURE] = dmares->start; + + /* configuration: max dma trigger threshold, enable ac97 */ + wd->cfg = PSC_AC97CFG_RT_FIFO8 | PSC_AC97CFG_TT_FIFO8 | + PSC_AC97CFG_DE_ENABLE; + + /* preserve PSC clock source set up by platform */ + sel = __raw_readl(PSC_SEL(wd)) & PSC_SEL_CLK_MASK; + __raw_writel(PSC_CTRL_DISABLE, PSC_CTRL(wd)); + wmb(); /* drain writebuffer */ + __raw_writel(0, PSC_SEL(wd)); + wmb(); /* drain writebuffer */ + __raw_writel(PSC_SEL_PS_AC97MODE | sel, PSC_SEL(wd)); + wmb(); /* drain writebuffer */ + + /* name the DAI like this device instance ("au1xpsc-ac97.PSCINDEX") */ + memcpy(&wd->dai_drv, &au1xpsc_ac97_dai_template, + sizeof(struct snd_soc_dai_driver)); + wd->dai_drv.name = dev_name(&pdev->dev); + + platform_set_drvdata(pdev, wd); + + ret = snd_soc_set_ac97_ops(&psc_ac97_ops); + if (ret) + return ret; + + ret = snd_soc_register_component(&pdev->dev, &au1xpsc_ac97_component, + &wd->dai_drv, 1); + if (ret) + return ret; + + au1xpsc_ac97_workdata = wd; + return 0; +} + +static int au1xpsc_ac97_drvremove(struct platform_device *pdev) +{ + struct au1xpsc_audio_data *wd = platform_get_drvdata(pdev); + + snd_soc_unregister_component(&pdev->dev); + + /* disable PSC completely */ + __raw_writel(0, AC97_CFG(wd)); + wmb(); /* drain writebuffer */ + __raw_writel(PSC_CTRL_DISABLE, PSC_CTRL(wd)); + wmb(); /* drain writebuffer */ + + au1xpsc_ac97_workdata = NULL; /* MDEV */ + + return 0; +} + +#ifdef CONFIG_PM +static int au1xpsc_ac97_drvsuspend(struct device *dev) +{ + struct au1xpsc_audio_data *wd = dev_get_drvdata(dev); + + /* save interesting registers and disable PSC */ + wd->pm[0] = __raw_readl(PSC_SEL(wd)); + + __raw_writel(0, AC97_CFG(wd)); + wmb(); /* drain writebuffer */ + __raw_writel(PSC_CTRL_DISABLE, PSC_CTRL(wd)); + wmb(); /* drain writebuffer */ + + return 0; +} + +static int au1xpsc_ac97_drvresume(struct device *dev) +{ + struct au1xpsc_audio_data *wd = dev_get_drvdata(dev); + + /* restore PSC clock config */ + __raw_writel(wd->pm[0] | PSC_SEL_PS_AC97MODE, PSC_SEL(wd)); + wmb(); /* drain writebuffer */ + + /* after this point the ac97 core will cold-reset the codec. + * During cold-reset the PSC is reinitialized and the last + * configuration set up in hw_params() is restored. + */ + return 0; +} + +static const struct dev_pm_ops au1xpscac97_pmops = { + .suspend = au1xpsc_ac97_drvsuspend, + .resume = au1xpsc_ac97_drvresume, +}; + +#define AU1XPSCAC97_PMOPS &au1xpscac97_pmops + +#else + +#define AU1XPSCAC97_PMOPS NULL + +#endif + +static struct platform_driver au1xpsc_ac97_driver = { + .driver = { + .name = "au1xpsc_ac97", + .pm = AU1XPSCAC97_PMOPS, + }, + .probe = au1xpsc_ac97_drvprobe, + .remove = au1xpsc_ac97_drvremove, +}; + +module_platform_driver(au1xpsc_ac97_driver); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("Au12x0/Au1550 PSC AC97 ALSA ASoC audio driver"); +MODULE_AUTHOR("Manuel Lauss"); + -- cgit v1.2.3