exi.c File Reference

#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include "asm.h"
#include "irq.h"
#include "processor.h"
#include "spinlock.h"
#include "exi.h"

Include dependency graph for exi.c:

Classes
struct	_lck_dev
struct	_exibus_priv

Macros
#define	EXI_LOCK_DEVS   32
#define	EXI_MAX_CHANNELS   3
#define	EXI_MAX_DEVICES   3
#define	EXI_DEVICE0   0x0080
#define	EXI_DEVICE1   0x0100
#define	EXI_DEVICE2   0x0200
#define	EXI_EXI_IRQ   0x0002
#define	EXI_TC_IRQ   0x0008
#define	EXI_EXT_IRQ   0x0800
#define	EXI_EXT_BIT   0x1000
#define	_SHIFTL(v, s, w)   ((u32) (((u32)(v) & ((0x01 << (w)) - 1)) << (s)))
#define	_SHIFTR(v, s, w)   ((u32)(((u32)(v) >> (s)) & ((0x01 << (w)) - 1)))

Typedefs
typedef struct _exibus_priv	exibus_priv

Functions
static void	__exi_irq_handler (u32, void *)
static void	__tc_irq_handler (u32, void *)
static void	__ext_irq_handler (u32, void *)
static __inline__ void	__exi_clearirqs (s32 nChn, u32 nEXIIrq, u32 nTCIrq, u32 nEXTIrq)
static __inline__ void	__exi_setinterrupts (s32 nChn, exibus_priv *exi)
static void	__exi_initmap (exibus_priv *exim)
static s32	__exi_probe (s32 nChn)
static s32	__exi_attach (s32 nChn, EXICallback ext_cb)
s32	EXI_Lock (s32 nChn, s32 nDev, EXICallback unlockCB)
	Try to lock the desired EXI channel on the given device. More...
s32	EXI_Unlock (s32 nChn)
	Unlock the desired EXI channel. More...
s32	EXI_Select (s32 nChn, s32 nDev, s32 nFrq)
	Selects the spedified EXI channel on the given device with the given frequency. More...
s32	EXI_SelectSD (s32 nChn, s32 nDev, s32 nFrq)
	Performs a special select, for SD cards or adapters respectively, on the given device with the given frequence. More...
s32	EXI_Deselect (s32 nChn)
	Deselects the EXI channel. More...
s32	EXI_Sync (s32 nChn)
	Synchronize or finish respectively the last EXI transfer. More...
s32	EXI_Imm (s32 nChn, void *pData, u32 nLen, u32 nMode, EXICallback tc_cb)
	Initializes an immediate mode EXI transfer. More...
s32	EXI_ImmEx (s32 nChn, void *pData, u32 nLen, u32 nMode)
	Initializes an extended immediate mode EXI transfer. More...
s32	EXI_Dma (s32 nChn, void *pData, u32 nLen, u32 nMode, EXICallback tc_cb)
	Initializes a DMA mode EXI transfer. More...
s32	EXI_GetState (s32 nChn)
	Get the EXI state. More...
static s32	__unlocked_handler (s32 nChn, s32 nDev)
s32	EXI_GetID (s32 nChn, s32 nDev, u32 *nId)
	Get the ID of the connected EXI device on the given channel. More...
s32	EXI_Attach (s32 nChn, EXICallback ext_cb)
	Attach the device on the given channel. More...
s32	EXI_Detach (s32 nChn)
	Detach the device on the given channel. More...
EXICallback	EXI_RegisterEXICallback (s32 nChn, EXICallback exi_cb)
	Register a callback function in the EXI driver for the EXI interrupt. More...
s32	EXI_Probe (s32 nChn)
	Probes the EXI channel. More...
s32	EXI_ProbeEx (s32 nChn)
	Performs an extended probe of the EXI channel. More...
void	EXI_ProbeReset ()
	Resets certain internal flags and counters and performs a probe on all 3 channels. More...
void	__exi_init ()
static s32	__probebarnacle (s32 chn, u32 dev, u32 *rev)
static s32	__queuelength ()
void	__SYS_EnableBarnacle (s32 chn, u32 dev)
s32	InitializeUART ()
s32	WriteUARTN (void *buf, u32 len)

Variables
static lwp_queue	_lckdev_queue
static struct _lck_dev	lckdevs [EXI_LOCK_DEVS]
static exibus_priv	eximap [EXI_MAX_CHANNELS]
static u64	last_exi_idtime [EXI_MAX_CHANNELS]
static u32	exi_id_serport1 = 0
static u32	exi_uart_chan = EXI_CHANNEL_0
static u32	exi_uart_dev = EXI_DEVICE_0
static u32	exi_uart_barnacle_enabled = 0
static u32	exi_uart_enabled = 0

Macro Definition Documentation

_SHIFTL

#define _SHIFTL	(		v,
			s,
			w
	)		((u32) (((u32)(v) & ((0x01 << (w)) - 1)) << (s)))

_SHIFTR

#define _SHIFTR	(		v,
			s,
			w
	)		((u32)(((u32)(v) >> (s)) & ((0x01 << (w)) - 1)))

EXI_DEVICE0

#define EXI_DEVICE0   0x0080

EXI_DEVICE1

#define EXI_DEVICE1   0x0100

EXI_DEVICE2

#define EXI_DEVICE2   0x0200

EXI_EXI_IRQ

#define EXI_EXI_IRQ   0x0002

EXI_EXT_BIT

#define EXI_EXT_BIT   0x1000

EXI_EXT_IRQ

#define EXI_EXT_IRQ   0x0800

EXI_LOCK_DEVS

#define EXI_LOCK_DEVS   32

EXI_MAX_CHANNELS

#define EXI_MAX_CHANNELS   3

EXI_MAX_DEVICES

#define EXI_MAX_DEVICES   3

EXI_TC_IRQ

#define EXI_TC_IRQ   0x0008

Typedef Documentation

exibus_priv

typedef struct _exibus_priv exibus_priv

Function Documentation

__exi_attach()

static s32 __exi_attach ( s32  nChn, EXICallback  ext_cb  )

static

Here is the call graph for this function:

Here is the caller graph for this function:

__exi_clearirqs()

static __inline__ void __exi_clearirqs ( s32  nChn, u32  nEXIIrq, u32  nTCIrq, u32  nEXTIrq  )

static

Here is the caller graph for this function:

__exi_init()

void __exi_init

(

void

)

Here is the call graph for this function:

Here is the caller graph for this function:

__exi_initmap()

static void __exi_initmap ( exibus_priv *  exim )

static

Here is the call graph for this function:

Here is the caller graph for this function:

__exi_irq_handler()

void __exi_irq_handler ( u32  nIrq, void *  pCtx  )

static

Here is the call graph for this function:

Here is the caller graph for this function:

__exi_probe()

static s32 __exi_probe ( s32  nChn )

static

Here is the call graph for this function:

Here is the caller graph for this function:

__exi_setinterrupts()

static __inline__ void __exi_setinterrupts ( s32  nChn, exibus_priv *  exi  )

static

Here is the call graph for this function:

Here is the caller graph for this function:

__ext_irq_handler()

void __ext_irq_handler ( u32  nIrq, void *  pCtx  )

static

Here is the call graph for this function:

Here is the caller graph for this function:

__probebarnacle()

static s32 __probebarnacle ( s32  chn, u32  dev, u32 *  rev  )

static

Here is the call graph for this function:

Here is the caller graph for this function:

__queuelength()

static s32 __queuelength ( )

static

Here is the call graph for this function:

Here is the caller graph for this function:

__SYS_EnableBarnacle()

void __SYS_EnableBarnacle	(	s32	chn,
		u32	dev
	)

Here is the call graph for this function:

__tc_irq_handler()

void __tc_irq_handler ( u32  nIrq, void *  pCtx  )

static

Here is the call graph for this function:

Here is the caller graph for this function:

__unlocked_handler()

static s32 __unlocked_handler ( s32  nChn, s32  nDev  )

static

Here is the call graph for this function:

Here is the caller graph for this function:

EXI_Attach()

s32 EXI_Attach	(	s32	nChn,
		EXICallback	ext_cb
	)

Attach the device on the given channel.

Parameters

[in]	nChn	EXI channel to select
[in]	ext_cb	pointer to callback to call when device is physically removed.

Returns

1 on success, <=0 on error

Here is the call graph for this function:

Here is the caller graph for this function:

EXI_Deselect()

s32 EXI_Deselect

(

s32

nChn

)

Deselects the EXI channel.

Parameters

[in]

nChn

EXI channel to deselect

Returns

1 on success, <=0 on error

Here is the call graph for this function:

Here is the caller graph for this function:

EXI_Detach()

s32 EXI_Detach

(

s32

nChn

)

Detach the device on the given channel.

Parameters

[in]

nChn

EXI channel to select

Returns

1 on success, <=0 on error

Here is the call graph for this function:

Here is the caller graph for this function:

EXI_Dma()

s32 EXI_Dma	(	s32	nChn,
		void *	pData,
		u32	nLen,
		u32	nMode,
		EXICallback	tc_cb
	)

Initializes a DMA mode EXI transfer.

Parameters

[in]	nChn	EXI channel to select
[in,out]	pData	pointer to a buffer to read/copy from/to data.
[in]	nLen	lenght of data to transfer.
[in]	nMode	direction of transferoperation(EXI_READ,EXI_WRITE,EXI_READWRITE)
[in]	tc_cb	pointer to a callback to call when transfer has completed. May be NULL.

Returns

1 on success, <=0 on error

Here is the call graph for this function:

Here is the caller graph for this function:

EXI_GetID()

s32 EXI_GetID	(	s32	nChn,
		s32	nDev,
		u32 *	nId
	)

Get the ID of the connected EXI device on the given channel.

Parameters

[in]	nChn	EXI channel to select
[in]	nDev	EXI device to select
[out]	nId	EXI device ID to return.

Returns

1 on success, <=0 on error

Here is the call graph for this function:

Here is the caller graph for this function:

EXI_GetState()

s32 EXI_GetState

(

s32

nChn

)

Get the EXI state.

Parameters

[in]

nChn

EXI channel to select

Returns

EXI channels state flag.

Here is the caller graph for this function:

EXI_Imm()

s32 EXI_Imm	(	s32	nChn,
		void *	pData,
		u32	nLen,
		u32	nMode,
		EXICallback	tc_cb
	)

Initializes an immediate mode EXI transfer.

Parameters

[in]	nChn	EXI channel to select
[in,out]	pData	pointer to a buffer to read/copy from/to data.
[in]	nLen	lenght of data to transfer <=4.
[in]	nMode	direction of transferoperation(EXI_READ,EXI_WRITE,EXI_READWRITE)
[in]	tc_cb	pointer to a callback to call when transfer has completed. May be NULL.

Returns

1 on success, <=0 on error

Here is the call graph for this function:

Here is the caller graph for this function:

EXI_ImmEx()

s32 EXI_ImmEx	(	s32	nChn,
		void *	pData,
		u32	nLen,
		u32	nMode
	)

Initializes an extended immediate mode EXI transfer.

Parameters

[in]	nChn	EXI channel to select
[in,out]	pData	pointer to a buffer to read/copy from/to data.
[in]	nLen	lenght of data to transfer.
[in]	nMode	direction of transferoperation(EXI_READ,EXI_WRITE,EXI_READWRITE)

Returns

1 on success, <=0 on error

Here is the call graph for this function:

Here is the caller graph for this function:

EXI_Lock()

s32 EXI_Lock	(	s32	nChn,
		s32	nDev,
		EXICallback	unlockCB
	)

Try to lock the desired EXI channel on the given device.

Parameters

[in]	nChn	EXI channel to lock
[in]	nDev	EXI device to lock
[in]	unlockCB	pointer to callback to call when EXI_Unlock() is called. Thus allowing us a small way of mutual exclusion.

Returns

1 on success, <=0 on error

Here is the call graph for this function:

Here is the caller graph for this function:

EXI_Probe()

s32 EXI_Probe

(

s32

nChn

)

Probes the EXI channel.

Parameters

[in]

nChn

EXI channel to probe

Returns

1 on success, <=0 on error

Here is the call graph for this function:

Here is the caller graph for this function:

EXI_ProbeEx()

s32 EXI_ProbeEx

(

s32

nChn

)

Performs an extended probe of the EXI channel.

Parameters

[in]

nChn

EXI channel to probe

Returns

1 on success, <=0 on error

Here is the call graph for this function:

Here is the caller graph for this function:

EXI_ProbeReset()

void EXI_ProbeReset

(

)

Resets certain internal flags and counters and performs a probe on all 3 channels.

Returns

nothing

Here is the call graph for this function:

Here is the caller graph for this function:

EXI_RegisterEXICallback()

EXICallback EXI_RegisterEXICallback	(	s32	nChn,
		EXICallback	exi_cb
	)

Register a callback function in the EXI driver for the EXI interrupt.

Parameters

[in]	nChn	EXI channel to select
[in]	exi_cb	pointer to the function which to call when EXI interrupt has triggered.

Returns

old callback function pointer or NULL

Here is the call graph for this function:

Here is the caller graph for this function:

EXI_Select()

s32 EXI_Select	(	s32	nChn,
		s32	nDev,
		s32	nFrq
	)

Selects the spedified EXI channel on the given device with the given frequency.

Parameters

[in]	nChn	EXI channel to select
[in]	nDev	EXI device to select
[in]	nFrq	EXI frequency to select

Returns

1 on success, <=0 on error

Here is the call graph for this function:

Here is the caller graph for this function:

EXI_SelectSD()

s32 EXI_SelectSD	(	s32	nChn,
		s32	nDev,
		s32	nFrq
	)

Performs a special select, for SD cards or adapters respectively, on the given device with the given frequence.

Parameters

[in]	nChn	EXI channel to select
[in]	nDev	EXI device to select
[in]	nFrq	EXI frequency to select

Returns

1 on success, <=0 on error

Here is the call graph for this function:

Here is the caller graph for this function:

EXI_Sync()

s32 EXI_Sync

(

s32

nChn

)

Synchronize or finish respectively the last EXI transfer.

Parameters

[in]

nChn

EXI channel to select

Returns

1 on success, <=0 on error

Here is the caller graph for this function:

EXI_Unlock()

s32 EXI_Unlock

(

s32

nChn

)

Unlock the desired EXI channel.

Parameters

[in]

nChn

EXI channel to unlock

Returns

1 on success, <=0 on error

Here is the call graph for this function:

Here is the caller graph for this function:

InitializeUART()

s32 InitializeUART

(

)

WriteUARTN()

s32 WriteUARTN	(	void *	buf,
		u32	len
	)

Here is the call graph for this function:

Variable Documentation

_lckdev_queue

lwp_queue _lckdev_queue

static

exi_id_serport1

u32 exi_id_serport1 = 0

static

exi_uart_barnacle_enabled

u32 exi_uart_barnacle_enabled = 0

static

exi_uart_chan

u32 exi_uart_chan = EXI_CHANNEL_0

static

exi_uart_dev

u32 exi_uart_dev = EXI_DEVICE_0

static

exi_uart_enabled

u32 exi_uart_enabled = 0

static

eximap

exibus_priv eximap[EXI_MAX_CHANNELS]

static

last_exi_idtime

u64 last_exi_idtime[EXI_MAX_CHANNELS]

static

lckdevs

struct _lck_dev lckdevs[EXI_LOCK_DEVS]

static