1 /* 2 * i2sbus driver -- private definitions 3 * 4 * Copyright 2006 Johannes Berg <johannes@sipsolutions.net> 5 * 6 * GPL v2, can be found in COPYING. 7 */ 8 #ifndef __I2SBUS_H 9 #define __I2SBUS_H 10 #include <linux/interrupt.h> 11 #include <linux/spinlock.h> 12 #include <linux/mutex.h> 13 #include <linux/completion.h> 14 15 #include <sound/pcm.h> 16 17 #include <asm/prom.h> 18 #include <asm/pmac_feature.h> 19 #include <asm/dbdma.h> 20 21 #include "interface.h" 22 #include "../soundbus.h" 23 24 struct i2sbus_control { 25 struct list_head list; 26 struct macio_chip *macio; 27 }; 28 29 #define MAX_DBDMA_COMMANDS 32 30 31 struct dbdma_command_mem { 32 dma_addr_t bus_addr; 33 dma_addr_t bus_cmd_start; 34 struct dbdma_cmd *cmds; 35 void *space; 36 int size; 37 u32 running:1; 38 u32 stopping:1; 39 }; 40 41 struct pcm_info { 42 u32 created:1, /* has this direction been created with alsa? */ 43 active:1; /* is this stream active? */ 44 /* runtime information */ 45 struct snd_pcm_substream *substream; 46 int current_period; 47 u32 frame_count; 48 struct dbdma_command_mem dbdma_ring; 49 volatile struct dbdma_regs __iomem *dbdma; 50 struct completion *stop_completion; 51 }; 52 53 enum { 54 aoa_resource_i2smmio = 0, 55 aoa_resource_txdbdma, 56 aoa_resource_rxdbdma, 57 }; 58 59 struct i2sbus_dev { 60 struct soundbus_dev sound; 61 struct macio_dev *macio; 62 struct i2sbus_control *control; 63 volatile struct i2s_interface_regs __iomem *intfregs; 64 65 struct resource resources[3]; 66 struct resource *allocated_resource[3]; 67 int interrupts[3]; 68 char rnames[3][32]; 69 70 /* info about currently active substreams */ 71 struct pcm_info out, in; 72 snd_pcm_format_t format; 73 unsigned int rate; 74 75 /* list for a single controller */ 76 struct list_head item; 77 /* number of bus on controller */ 78 int bus_number; 79 /* for use by control layer */ 80 struct pmf_function *enable, 81 *cell_enable, 82 *cell_disable, 83 *clock_enable, 84 *clock_disable; 85 86 /* locks */ 87 /* spinlock for low-level interrupt locking */ 88 spinlock_t low_lock; 89 /* mutex for high-level consistency */ 90 struct mutex lock; 91 }; 92 93 #define soundbus_dev_to_i2sbus_dev(sdev) \ 94 container_of(sdev, struct i2sbus_dev, sound) 95 96 /* pcm specific functions */ 97 extern int 98 i2sbus_attach_codec(struct soundbus_dev *dev, struct snd_card *card, 99 struct codec_info *ci, void *data); 100 extern void 101 i2sbus_detach_codec(struct soundbus_dev *dev, void *data); 102 extern irqreturn_t 103 i2sbus_tx_intr(int irq, void *devid); 104 extern irqreturn_t 105 i2sbus_rx_intr(int irq, void *devid); 106 107 extern void i2sbus_wait_for_stop_both(struct i2sbus_dev *i2sdev); 108 extern void i2sbus_pcm_prepare_both(struct i2sbus_dev *i2sdev); 109 110 /* control specific functions */ 111 extern int i2sbus_control_init(struct macio_dev* dev, 112 struct i2sbus_control **c); 113 extern void i2sbus_control_destroy(struct i2sbus_control *c); 114 extern int i2sbus_control_add_dev(struct i2sbus_control *c, 115 struct i2sbus_dev *i2sdev); 116 extern void i2sbus_control_remove_dev(struct i2sbus_control *c, 117 struct i2sbus_dev *i2sdev); 118 extern int i2sbus_control_enable(struct i2sbus_control *c, 119 struct i2sbus_dev *i2sdev); 120 extern int i2sbus_control_cell(struct i2sbus_control *c, 121 struct i2sbus_dev *i2sdev, 122 int enable); 123 extern int i2sbus_control_clock(struct i2sbus_control *c, 124 struct i2sbus_dev *i2sdev, 125 int enable); 126 #endif /* __I2SBUS_H */ 127