1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * i2sbus driver -- private definitions 4 * 5 * Copyright 2006 Johannes Berg <johannes@sipsolutions.net> 6 */ 7 #ifndef __I2SBUS_H 8 #define __I2SBUS_H 9 #include <linux/interrupt.h> 10 #include <linux/spinlock.h> 11 #include <linux/mutex.h> 12 #include <linux/completion.h> 13 14 #include <sound/pcm.h> 15 16 #include <asm/prom.h> 17 #include <asm/pmac_feature.h> 18 #include <asm/dbdma.h> 19 20 #include "interface.h" 21 #include "../soundbus.h" 22 23 struct i2sbus_control { 24 struct list_head list; 25 struct macio_chip *macio; 26 }; 27 28 #define MAX_DBDMA_COMMANDS 32 29 30 struct dbdma_command_mem { 31 dma_addr_t bus_addr; 32 dma_addr_t bus_cmd_start; 33 struct dbdma_cmd *cmds; 34 void *space; 35 int size; 36 u32 running:1; 37 u32 stopping:1; 38 }; 39 40 struct pcm_info { 41 u32 created:1, /* has this direction been created with alsa? */ 42 active:1; /* is this stream active? */ 43 /* runtime information */ 44 struct snd_pcm_substream *substream; 45 int current_period; 46 u32 frame_count; 47 struct dbdma_command_mem dbdma_ring; 48 volatile struct dbdma_regs __iomem *dbdma; 49 struct completion *stop_completion; 50 }; 51 52 enum { 53 aoa_resource_i2smmio = 0, 54 aoa_resource_txdbdma, 55 aoa_resource_rxdbdma, 56 }; 57 58 struct i2sbus_dev { 59 struct soundbus_dev sound; 60 struct macio_dev *macio; 61 struct i2sbus_control *control; 62 volatile struct i2s_interface_regs __iomem *intfregs; 63 64 struct resource resources[3]; 65 struct resource *allocated_resource[3]; 66 int interrupts[3]; 67 char rnames[3][32]; 68 69 /* info about currently active substreams */ 70 struct pcm_info out, in; 71 snd_pcm_format_t format; 72 unsigned int rate; 73 74 /* list for a single controller */ 75 struct list_head item; 76 /* number of bus on controller */ 77 int bus_number; 78 /* for use by control layer */ 79 struct pmf_function *enable, 80 *cell_enable, 81 *cell_disable, 82 *clock_enable, 83 *clock_disable; 84 85 /* locks */ 86 /* spinlock for low-level interrupt locking */ 87 spinlock_t low_lock; 88 /* mutex for high-level consistency */ 89 struct mutex lock; 90 }; 91 92 #define soundbus_dev_to_i2sbus_dev(sdev) \ 93 container_of(sdev, struct i2sbus_dev, sound) 94 95 /* pcm specific functions */ 96 extern int 97 i2sbus_attach_codec(struct soundbus_dev *dev, struct snd_card *card, 98 struct codec_info *ci, void *data); 99 extern void 100 i2sbus_detach_codec(struct soundbus_dev *dev, void *data); 101 extern irqreturn_t 102 i2sbus_tx_intr(int irq, void *devid); 103 extern irqreturn_t 104 i2sbus_rx_intr(int irq, void *devid); 105 106 extern void i2sbus_wait_for_stop_both(struct i2sbus_dev *i2sdev); 107 extern void i2sbus_pcm_prepare_both(struct i2sbus_dev *i2sdev); 108 109 /* control specific functions */ 110 extern int i2sbus_control_init(struct macio_dev* dev, 111 struct i2sbus_control **c); 112 extern void i2sbus_control_destroy(struct i2sbus_control *c); 113 extern int i2sbus_control_add_dev(struct i2sbus_control *c, 114 struct i2sbus_dev *i2sdev); 115 extern void i2sbus_control_remove_dev(struct i2sbus_control *c, 116 struct i2sbus_dev *i2sdev); 117 extern int i2sbus_control_enable(struct i2sbus_control *c, 118 struct i2sbus_dev *i2sdev); 119 extern int i2sbus_control_cell(struct i2sbus_control *c, 120 struct i2sbus_dev *i2sdev, 121 int enable); 122 extern int i2sbus_control_clock(struct i2sbus_control *c, 123 struct i2sbus_dev *i2sdev, 124 int enable); 125 #endif /* __I2SBUS_H */ 126