root/sound/pci/hda/hda_controller.h

INCLUDED FROM

DEFINITIONS

1. azx_snoop
2. get_azx_dev

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  *  Common functionality for the alsa driver code base for HD Audio.
   4  */
   5 
   6 #ifndef __SOUND_HDA_CONTROLLER_H
   7 #define __SOUND_HDA_CONTROLLER_H
   8 
   9 #include <linux/timecounter.h>
  10 #include <linux/interrupt.h>
  11 #include <sound/core.h>
  12 #include <sound/pcm.h>
  13 #include <sound/initval.h>
  14 #include <sound/hda_codec.h>
  15 #include <sound/hda_register.h>
  16 
  17 #define AZX_MAX_CODECS          HDA_MAX_CODECS
  18 #define AZX_DEFAULT_CODECS      4
  19 
  20 /* driver quirks (capabilities) */
  21 /* bits 0-7 are used for indicating driver type */
  22 #define AZX_DCAPS_NO_TCSEL      (1 << 8)        /* No Intel TCSEL bit */
  23 #define AZX_DCAPS_NO_MSI        (1 << 9)        /* No MSI support */
  24 #define AZX_DCAPS_SNOOP_MASK    (3 << 10)       /* snoop type mask */
  25 #define AZX_DCAPS_SNOOP_OFF     (1 << 12)       /* snoop default off */
  26 #ifdef CONFIG_SND_HDA_I915
  27 #define AZX_DCAPS_I915_COMPONENT (1 << 13)      /* bind with i915 gfx */
  28 #else
  29 #define AZX_DCAPS_I915_COMPONENT 0              /* NOP */
  30 #endif
  31 /* 14 unused */
  32 #define AZX_DCAPS_CTX_WORKAROUND (1 << 15)      /* X-Fi workaround */
  33 #define AZX_DCAPS_POSFIX_LPIB   (1 << 16)       /* Use LPIB as default */
  34 #define AZX_DCAPS_AMD_WORKAROUND (1 << 17)      /* AMD-specific workaround */
  35 #define AZX_DCAPS_NO_64BIT      (1 << 18)       /* No 64bit address */
  36 #define AZX_DCAPS_SYNC_WRITE    (1 << 19)       /* sync each cmd write */
  37 #define AZX_DCAPS_OLD_SSYNC     (1 << 20)       /* Old SSYNC reg for ICH */
  38 #define AZX_DCAPS_NO_ALIGN_BUFSIZE (1 << 21)    /* no buffer size alignment */
  39 /* 22 unused */
  40 #define AZX_DCAPS_4K_BDLE_BOUNDARY (1 << 23)    /* BDLE in 4k boundary */
  41 /* 24 unused */
  42 #define AZX_DCAPS_COUNT_LPIB_DELAY  (1 << 25)   /* Take LPIB as delay */
  43 #define AZX_DCAPS_PM_RUNTIME    (1 << 26)       /* runtime PM support */
  44 /* 27 unused */
  45 #define AZX_DCAPS_CORBRP_SELF_CLEAR (1 << 28)   /* CORBRP clears itself after reset */
  46 #define AZX_DCAPS_NO_MSI64      (1 << 29)       /* Stick to 32-bit MSIs */
  47 #define AZX_DCAPS_SEPARATE_STREAM_TAG   (1 << 30) /* capture and playback use separate stream tag */
  48 
  49 enum {
  50         AZX_SNOOP_TYPE_NONE,
  51         AZX_SNOOP_TYPE_SCH,
  52         AZX_SNOOP_TYPE_ATI,
  53         AZX_SNOOP_TYPE_NVIDIA,
  54 };
  55 
  56 struct azx_dev {
  57         struct hdac_stream core;
  58 
  59         unsigned int irq_pending:1;
  60         /*
  61          * For VIA:
  62          *  A flag to ensure DMA position is 0
  63          *  when link position is not greater than FIFO size
  64          */
  65         unsigned int insufficient:1;
  66 };
  67 
  68 #define azx_stream(dev)         (&(dev)->core)
  69 #define stream_to_azx_dev(s)    container_of(s, struct azx_dev, core)
  70 
  71 struct azx;
  72 
  73 /* Functions to read/write to hda registers. */
  74 struct hda_controller_ops {
  75         /* Disable msi if supported, PCI only */
  76         int (*disable_msi_reset_irq)(struct azx *);
  77         void (*pcm_mmap_prepare)(struct snd_pcm_substream *substream,
  78                                  struct vm_area_struct *area);
  79         /* Check if current position is acceptable */
  80         int (*position_check)(struct azx *chip, struct azx_dev *azx_dev);
  81         /* enable/disable the link power */
  82         int (*link_power)(struct azx *chip, bool enable);
  83 };
  84 
  85 struct azx_pcm {
  86         struct azx *chip;
  87         struct snd_pcm *pcm;
  88         struct hda_codec *codec;
  89         struct hda_pcm *info;
  90         struct list_head list;
  91 };
  92 
  93 typedef unsigned int (*azx_get_pos_callback_t)(struct azx *, struct azx_dev *);
  94 typedef int (*azx_get_delay_callback_t)(struct azx *, struct azx_dev *, unsigned int pos);
  95 
  96 struct azx {
  97         struct hda_bus bus;
  98 
  99         struct snd_card *card;
 100         struct pci_dev *pci;
 101         int dev_index;
 102 
 103         /* chip type specific */
 104         int driver_type;
 105         unsigned int driver_caps;
 106         int playback_streams;
 107         int playback_index_offset;
 108         int capture_streams;
 109         int capture_index_offset;
 110         int num_streams;
 111         int jackpoll_interval; /* jack poll interval in jiffies */
 112 
 113         /* Register interaction. */
 114         const struct hda_controller_ops *ops;
 115 
 116         /* position adjustment callbacks */
 117         azx_get_pos_callback_t get_position[2];
 118         azx_get_delay_callback_t get_delay[2];
 119 
 120         /* locks */
 121         struct mutex open_mutex; /* Prevents concurrent open/close operations */
 122 
 123         /* PCM */
 124         struct list_head pcm_list; /* azx_pcm list */
 125 
 126         /* HD codec */
 127         int  codec_probe_mask; /* copied from probe_mask option */
 128         unsigned int beep_mode;
 129 
 130 #ifdef CONFIG_SND_HDA_PATCH_LOADER
 131         const struct firmware *fw;
 132 #endif
 133 
 134         /* flags */
 135         int bdl_pos_adj;
 136         unsigned int running:1;
 137         unsigned int fallback_to_single_cmd:1;
 138         unsigned int single_cmd:1;
 139         unsigned int msi:1;
 140         unsigned int probing:1; /* codec probing phase */
 141         unsigned int snoop:1;
 142         unsigned int uc_buffer:1; /* non-cached pages for stream buffers */
 143         unsigned int align_buffer_size:1;
 144         unsigned int region_requested:1;
 145         unsigned int disabled:1; /* disabled by vga_switcheroo */
 146 
 147         /* GTS present */
 148         unsigned int gts_present:1;
 149 
 150 #ifdef CONFIG_SND_HDA_DSP_LOADER
 151         struct azx_dev saved_azx_dev;
 152 #endif
 153 };
 154 
 155 #define azx_bus(chip)   (&(chip)->bus.core)
 156 #define bus_to_azx(_bus)        container_of(_bus, struct azx, bus.core)
 157 
 158 static inline bool azx_snoop(struct azx *chip)
 159 {
 160         return !IS_ENABLED(CONFIG_X86) || chip->snoop;
 161 }
 162 
 163 /*
 164  * macros for easy use
 165  */
 166 
 167 #define azx_writel(chip, reg, value) \
 168         snd_hdac_chip_writel(azx_bus(chip), reg, value)
 169 #define azx_readl(chip, reg) \
 170         snd_hdac_chip_readl(azx_bus(chip), reg)
 171 #define azx_writew(chip, reg, value) \
 172         snd_hdac_chip_writew(azx_bus(chip), reg, value)
 173 #define azx_readw(chip, reg) \
 174         snd_hdac_chip_readw(azx_bus(chip), reg)
 175 #define azx_writeb(chip, reg, value) \
 176         snd_hdac_chip_writeb(azx_bus(chip), reg, value)
 177 #define azx_readb(chip, reg) \
 178         snd_hdac_chip_readb(azx_bus(chip), reg)
 179 
 180 #define azx_has_pm_runtime(chip) \
 181         ((chip)->driver_caps & AZX_DCAPS_PM_RUNTIME)
 182 
 183 /* PCM setup */
 184 static inline struct azx_dev *get_azx_dev(struct snd_pcm_substream *substream)
 185 {
 186         return substream->runtime->private_data;
 187 }
 188 unsigned int azx_get_position(struct azx *chip, struct azx_dev *azx_dev);
 189 unsigned int azx_get_pos_lpib(struct azx *chip, struct azx_dev *azx_dev);
 190 unsigned int azx_get_pos_posbuf(struct azx *chip, struct azx_dev *azx_dev);
 191 
 192 /* Stream control. */
 193 void azx_stop_all_streams(struct azx *chip);
 194 
 195 /* Allocation functions. */
 196 #define azx_alloc_stream_pages(chip) \
 197         snd_hdac_bus_alloc_stream_pages(azx_bus(chip))
 198 #define azx_free_stream_pages(chip) \
 199         snd_hdac_bus_free_stream_pages(azx_bus(chip))
 200 
 201 /* Low level azx interface */
 202 void azx_init_chip(struct azx *chip, bool full_reset);
 203 void azx_stop_chip(struct azx *chip);
 204 #define azx_enter_link_reset(chip) \
 205         snd_hdac_bus_enter_link_reset(azx_bus(chip))
 206 irqreturn_t azx_interrupt(int irq, void *dev_id);
 207 
 208 /* Codec interface */
 209 int azx_bus_init(struct azx *chip, const char *model);
 210 int azx_probe_codecs(struct azx *chip, unsigned int max_slots);
 211 int azx_codec_configure(struct azx *chip);
 212 int azx_init_streams(struct azx *chip);
 213 void azx_free_streams(struct azx *chip);
 214 
 215 #endif /* __SOUND_HDA_CONTROLLER_H */