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 <asm/dbdma.h> 11 #include <linux/interrupt.h> 12 #include <sound/pcm.h> 13 #include <linux/spinlock.h> 14 #include <linux/mutex.h> 15 #include <asm/prom.h> 16 #include "i2sbus-interface.h" 17 #include "i2sbus-control.h" 18 #include "../soundbus.h" 19 20 struct i2sbus_control { 21 volatile struct i2s_control_regs __iomem *controlregs; 22 struct resource rsrc; 23 struct list_head list; 24 }; 25 26 #define MAX_DBDMA_COMMANDS 32 27 28 struct dbdma_command_mem { 29 dma_addr_t bus_addr; 30 dma_addr_t bus_cmd_start; 31 struct dbdma_cmd *cmds; 32 void *space; 33 int size; 34 u32 running:1; 35 }; 36 37 struct pcm_info { 38 u32 created:1, /* has this direction been created with alsa? */ 39 active:1; /* is this stream active? */ 40 /* runtime information */ 41 struct snd_pcm_substream *substream; 42 int current_period; 43 u32 frame_count; 44 struct dbdma_command_mem dbdma_ring; 45 volatile struct dbdma_regs __iomem *dbdma; 46 }; 47 48 struct i2sbus_dev { 49 struct soundbus_dev sound; 50 struct macio_dev *macio; 51 struct i2sbus_control *control; 52 volatile struct i2s_interface_regs __iomem *intfregs; 53 54 struct resource resources[3]; 55 struct resource *allocated_resource[3]; 56 int interrupts[3]; 57 char rnames[3][32]; 58 59 /* info about currently active substreams */ 60 struct pcm_info out, in; 61 snd_pcm_format_t format; 62 unsigned int rate; 63 64 /* list for a single controller */ 65 struct list_head item; 66 /* number of bus on controller */ 67 int bus_number; 68 /* for use by control layer */ 69 struct pmf_function *enable, 70 *cell_enable, 71 *cell_disable, 72 *clock_enable, 73 *clock_disable; 74 75 /* locks */ 76 /* spinlock for low-level interrupt locking */ 77 spinlock_t low_lock; 78 /* mutex for high-level consistency */ 79 struct mutex lock; 80 }; 81 82 #define soundbus_dev_to_i2sbus_dev(sdev) \ 83 container_of(sdev, struct i2sbus_dev, sound) 84 85 /* pcm specific functions */ 86 extern int 87 i2sbus_attach_codec(struct soundbus_dev *dev, struct snd_card *card, 88 struct codec_info *ci, void *data); 89 extern void 90 i2sbus_detach_codec(struct soundbus_dev *dev, void *data); 91 extern irqreturn_t 92 i2sbus_tx_intr(int irq, void *devid, struct pt_regs *regs); 93 extern irqreturn_t 94 i2sbus_rx_intr(int irq, void *devid, struct pt_regs *regs); 95 96 /* control specific functions */ 97 extern int i2sbus_control_init(struct macio_dev* dev, 98 struct i2sbus_control **c); 99 extern void i2sbus_control_destroy(struct i2sbus_control *c); 100 extern int i2sbus_control_add_dev(struct i2sbus_control *c, 101 struct i2sbus_dev *i2sdev); 102 extern void i2sbus_control_remove_dev(struct i2sbus_control *c, 103 struct i2sbus_dev *i2sdev); 104 extern int i2sbus_control_enable(struct i2sbus_control *c, 105 struct i2sbus_dev *i2sdev); 106 extern int i2sbus_control_cell(struct i2sbus_control *c, 107 struct i2sbus_dev *i2sdev, 108 int enable); 109 extern int i2sbus_control_clock(struct i2sbus_control *c, 110 struct i2sbus_dev *i2sdev, 111 int enable); 112 #endif /* __I2SBUS_H */ 113