diff options
Diffstat (limited to 'include/asm-powerpc/pmac_low_i2c.h')
| -rw-r--r-- | include/asm-powerpc/pmac_low_i2c.h | 92 |
1 files changed, 78 insertions, 14 deletions
diff --git a/include/asm-powerpc/pmac_low_i2c.h b/include/asm-powerpc/pmac_low_i2c.h index 809a5963d5e7..131011bd7e76 100644 --- a/include/asm-powerpc/pmac_low_i2c.h +++ b/include/asm-powerpc/pmac_low_i2c.h | |||
| @@ -11,33 +11,97 @@ | |||
| 11 | */ | 11 | */ |
| 12 | #ifndef __PMAC_LOW_I2C_H__ | 12 | #ifndef __PMAC_LOW_I2C_H__ |
| 13 | #define __PMAC_LOW_I2C_H__ | 13 | #define __PMAC_LOW_I2C_H__ |
| 14 | #ifdef __KERNEL__ | ||
| 14 | 15 | ||
| 15 | /* i2c mode (based on the platform functions format) */ | 16 | /* i2c mode (based on the platform functions format) */ |
| 16 | enum { | 17 | enum { |
| 17 | pmac_low_i2c_mode_dumb = 1, | 18 | pmac_i2c_mode_dumb = 1, |
| 18 | pmac_low_i2c_mode_std = 2, | 19 | pmac_i2c_mode_std = 2, |
| 19 | pmac_low_i2c_mode_stdsub = 3, | 20 | pmac_i2c_mode_stdsub = 3, |
| 20 | pmac_low_i2c_mode_combined = 4, | 21 | pmac_i2c_mode_combined = 4, |
| 21 | }; | 22 | }; |
| 22 | 23 | ||
| 23 | /* RW bit in address */ | 24 | /* RW bit in address */ |
| 24 | enum { | 25 | enum { |
| 25 | pmac_low_i2c_read = 0x01, | 26 | pmac_i2c_read = 0x01, |
| 26 | pmac_low_i2c_write = 0x00 | 27 | pmac_i2c_write = 0x00 |
| 27 | }; | 28 | }; |
| 28 | 29 | ||
| 30 | /* i2c bus type */ | ||
| 31 | enum { | ||
| 32 | pmac_i2c_bus_keywest = 0, | ||
| 33 | pmac_i2c_bus_pmu = 1, | ||
| 34 | pmac_i2c_bus_smu = 2, | ||
| 35 | }; | ||
| 36 | |||
| 37 | /* i2c bus features */ | ||
| 38 | enum { | ||
| 39 | /* can_largesub : supports >1 byte subaddresses (SMU only) */ | ||
| 40 | pmac_i2c_can_largesub = 0x00000001u, | ||
| 41 | |||
| 42 | /* multibus : device node holds multiple busses, bus number is | ||
| 43 | * encoded in bits 0xff00 of "reg" of a given device | ||
| 44 | */ | ||
| 45 | pmac_i2c_multibus = 0x00000002u, | ||
| 46 | }; | ||
| 47 | |||
| 48 | /* i2c busses in the system */ | ||
| 49 | struct pmac_i2c_bus; | ||
| 50 | struct i2c_adapter; | ||
| 51 | |||
| 29 | /* Init, called early during boot */ | 52 | /* Init, called early during boot */ |
| 30 | extern void pmac_init_low_i2c(void); | 53 | extern int pmac_i2c_init(void); |
| 54 | |||
| 55 | /* Lookup an i2c bus for a device-node. The node can be either the bus | ||
| 56 | * node itself or a device below it. In the case of a multibus, the bus | ||
| 57 | * node itself is the controller node, else, it's a child of the controller | ||
| 58 | * node | ||
| 59 | */ | ||
| 60 | extern struct pmac_i2c_bus *pmac_i2c_find_bus(struct device_node *node); | ||
| 61 | |||
| 62 | /* Get the address for an i2c device. This strips the bus number if | ||
| 63 | * necessary. The 7 bits address is returned 1 bit right shifted so that the | ||
| 64 | * direction can be directly ored in | ||
| 65 | */ | ||
| 66 | extern u8 pmac_i2c_get_dev_addr(struct device_node *device); | ||
| 67 | |||
| 68 | /* Get infos about a bus */ | ||
| 69 | extern struct device_node *pmac_i2c_get_controller(struct pmac_i2c_bus *bus); | ||
| 70 | extern struct device_node *pmac_i2c_get_bus_node(struct pmac_i2c_bus *bus); | ||
| 71 | extern int pmac_i2c_get_type(struct pmac_i2c_bus *bus); | ||
| 72 | extern int pmac_i2c_get_flags(struct pmac_i2c_bus *bus); | ||
| 73 | extern int pmac_i2c_get_channel(struct pmac_i2c_bus *bus); | ||
| 74 | |||
| 75 | /* i2c layer adapter attach/detach */ | ||
| 76 | extern void pmac_i2c_attach_adapter(struct pmac_i2c_bus *bus, | ||
| 77 | struct i2c_adapter *adapter); | ||
| 78 | extern void pmac_i2c_detach_adapter(struct pmac_i2c_bus *bus, | ||
| 79 | struct i2c_adapter *adapter); | ||
| 80 | extern struct i2c_adapter *pmac_i2c_get_adapter(struct pmac_i2c_bus *bus); | ||
| 81 | extern struct pmac_i2c_bus *pmac_i2c_adapter_to_bus(struct i2c_adapter *adapter); | ||
| 82 | |||
| 83 | /* March a device or bus with an i2c adapter structure, to be used by drivers | ||
| 84 | * to match device-tree nodes with i2c adapters during adapter discovery | ||
| 85 | * callbacks | ||
| 86 | */ | ||
| 87 | extern int pmac_i2c_match_adapter(struct device_node *dev, | ||
| 88 | struct i2c_adapter *adapter); | ||
| 89 | |||
| 31 | 90 | ||
| 32 | /* Locking functions exposed to i2c-keywest */ | 91 | /* (legacy) Locking functions exposed to i2c-keywest */ |
| 33 | int pmac_low_i2c_lock(struct device_node *np); | 92 | extern int pmac_low_i2c_lock(struct device_node *np); |
| 34 | int pmac_low_i2c_unlock(struct device_node *np); | 93 | extern int pmac_low_i2c_unlock(struct device_node *np); |
| 35 | 94 | ||
| 36 | /* Access functions for platform code */ | 95 | /* Access functions for platform code */ |
| 37 | int pmac_low_i2c_open(struct device_node *np, int channel); | 96 | extern int pmac_i2c_open(struct pmac_i2c_bus *bus, int polled); |
| 38 | int pmac_low_i2c_close(struct device_node *np); | 97 | extern void pmac_i2c_close(struct pmac_i2c_bus *bus); |
| 39 | int pmac_low_i2c_setmode(struct device_node *np, int mode); | 98 | extern int pmac_i2c_setmode(struct pmac_i2c_bus *bus, int mode); |
| 40 | int pmac_low_i2c_xfer(struct device_node *np, u8 addrdir, u8 subaddr, u8 *data, int len); | 99 | extern int pmac_i2c_xfer(struct pmac_i2c_bus *bus, u8 addrdir, int subsize, |
| 100 | u32 subaddr, u8 *data, int len); | ||
| 41 | 101 | ||
| 102 | /* Suspend/resume code called by via-pmu directly for now */ | ||
| 103 | extern void pmac_pfunc_i2c_suspend(void); | ||
| 104 | extern void pmac_pfunc_i2c_resume(void); | ||
| 42 | 105 | ||
| 106 | #endif /* __KERNEL__ */ | ||
| 43 | #endif /* __PMAC_LOW_I2C_H__ */ | 107 | #endif /* __PMAC_LOW_I2C_H__ */ |