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 /* 19 unused */
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 #define AZX_DCAPS_RETRY_PROBE (1 << 27) /* retry probe if no codec is configured */
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 #define AZX_DCAPS_LS2X_WORKAROUND (1 << 31) /* Loongson-2H workaround */
49
50 enum {
51 AZX_SNOOP_TYPE_NONE,
52 AZX_SNOOP_TYPE_SCH,
53 AZX_SNOOP_TYPE_ATI,
54 AZX_SNOOP_TYPE_NVIDIA,
55 };
56
57 struct azx_dev {
58 struct hdac_stream core;
59
60 unsigned int irq_pending:1;
61 /*
62 * For VIA:
63 * A flag to ensure DMA position is 0
64 * when link position is not greater than FIFO size
65 */
66 unsigned int insufficient:1;
67
68 /* For Loongson */
69 unsigned int fix_prvpos;
70 };
71
72 #define azx_stream(dev) (&(dev)->core)
73 #define stream_to_azx_dev(s) container_of(s, struct azx_dev, core)
74
75 struct azx;
76
77 /* Functions to read/write to hda registers. */
78 struct hda_controller_ops {
79 /* Disable msi if supported, PCI only */
80 int (*disable_msi_reset_irq)(struct azx *);
81 void (*pcm_mmap_prepare)(struct snd_pcm_substream *substream,
82 struct vm_area_struct *area);
83 /* Check if current position is acceptable */
84 int (*position_check)(struct azx *chip, struct azx_dev *azx_dev);
85 /* enable/disable the link power */
86 int (*link_power)(struct azx *chip, bool enable);
87 };
88
89 struct azx_pcm {
90 struct azx *chip;
91 struct snd_pcm *pcm;
92 struct hda_codec *codec;
93 struct hda_pcm *info;
94 struct list_head list;
95 };
96
97 typedef unsigned int (*azx_get_pos_callback_t)(struct azx *, struct azx_dev *);
98 typedef int (*azx_get_delay_callback_t)(struct azx *, struct azx_dev *, unsigned int pos);
99
100 struct azx {
101 struct hda_bus bus;
102
103 struct snd_card *card;
104 struct pci_dev *pci;
105 int dev_index;
106
107 /* chip type specific */
108 int driver_type;
109 unsigned int driver_caps;
110 int playback_streams;
111 int playback_index_offset;
112 int capture_streams;
113 int capture_index_offset;
114 int num_streams;
115 int jackpoll_interval; /* jack poll interval in jiffies */
116
117 /* Register interaction. */
118 const struct hda_controller_ops *ops;
119
120 /* position adjustment callbacks */
121 azx_get_pos_callback_t get_position[2];
122 azx_get_delay_callback_t get_delay[2];
123
124 /* locks */
125 struct mutex open_mutex; /* Prevents concurrent open/close operations */
126
127 /* PCM */
128 struct list_head pcm_list; /* azx_pcm list */
129
130 /* HD codec */
131 int codec_probe_mask; /* copied from probe_mask option */
132 unsigned int beep_mode;
133
134 #ifdef CONFIG_SND_HDA_PATCH_LOADER
135 const struct firmware *fw;
136 #endif
137
138 /* flags */
139 int bdl_pos_adj;
140 unsigned int running:1;
141 unsigned int fallback_to_single_cmd:1;
142 unsigned int single_cmd:1;
143 unsigned int msi:1;
144 unsigned int probing:1; /* codec probing phase */
145 unsigned int snoop:1;
146 unsigned int uc_buffer:1; /* non-cached pages for stream buffers */
147 unsigned int align_buffer_size:1;
148 unsigned int region_requested:1;
149 unsigned int disabled:1; /* disabled by vga_switcheroo */
150 unsigned int pm_prepared:1;
151
152 /* GTS present */
153 unsigned int gts_present:1;
154
155 #ifdef CONFIG_SND_HDA_DSP_LOADER
156 struct azx_dev saved_azx_dev;
157 #endif
158 };
159
160 #define azx_bus(chip) (&(chip)->bus.core)
161 #define bus_to_azx(_bus) container_of(_bus, struct azx, bus.core)
162
azx_snoop(struct azx *chip)163 static inline bool azx_snoop(struct azx *chip)
164 {
165 return !IS_ENABLED(CONFIG_X86) || chip->snoop;
166 }
167
168 /*
169 * macros for easy use
170 */
171
172 #define azx_writel(chip, reg, value) \
173 snd_hdac_chip_writel(azx_bus(chip), reg, value)
174 #define azx_readl(chip, reg) \
175 snd_hdac_chip_readl(azx_bus(chip), reg)
176 #define azx_writew(chip, reg, value) \
177 snd_hdac_chip_writew(azx_bus(chip), reg, value)
178 #define azx_readw(chip, reg) \
179 snd_hdac_chip_readw(azx_bus(chip), reg)
180 #define azx_writeb(chip, reg, value) \
181 snd_hdac_chip_writeb(azx_bus(chip), reg, value)
182 #define azx_readb(chip, reg) \
183 snd_hdac_chip_readb(azx_bus(chip), reg)
184
185 #define azx_has_pm_runtime(chip) \
186 ((chip)->driver_caps & AZX_DCAPS_PM_RUNTIME)
187
188 /* PCM setup */
get_azx_dev(struct snd_pcm_substream *substream)189 static inline struct azx_dev *get_azx_dev(struct snd_pcm_substream *substream)
190 {
191 return substream->runtime->private_data;
192 }
193 unsigned int azx_get_position(struct azx *chip, struct azx_dev *azx_dev);
194 unsigned int azx_get_pos_lpib(struct azx *chip, struct azx_dev *azx_dev);
195 unsigned int azx_get_pos_posbuf(struct azx *chip, struct azx_dev *azx_dev);
196
197 /* Stream control. */
198 void azx_stop_all_streams(struct azx *chip);
199
200 /* Allocation functions. */
201 #define azx_alloc_stream_pages(chip) \
202 snd_hdac_bus_alloc_stream_pages(azx_bus(chip))
203 #define azx_free_stream_pages(chip) \
204 snd_hdac_bus_free_stream_pages(azx_bus(chip))
205
206 /* Low level azx interface */
207 void azx_init_chip(struct azx *chip, bool full_reset);
208 void azx_stop_chip(struct azx *chip);
209 #define azx_enter_link_reset(chip) \
210 snd_hdac_bus_enter_link_reset(azx_bus(chip))
211 irqreturn_t azx_interrupt(int irq, void *dev_id);
212
213 /* Codec interface */
214 int azx_bus_init(struct azx *chip, const char *model);
215 int azx_probe_codecs(struct azx *chip, unsigned int max_slots);
216 int azx_codec_configure(struct azx *chip);
217 int azx_init_streams(struct azx *chip);
218 void azx_free_streams(struct azx *chip);
219
220 #endif /* __SOUND_HDA_CONTROLLER_H */
221