68 #define setsda(adap,val) adap->setsda(adap->data, val)  argument
69 #define setscl(adap,val) adap->setscl(adap->data, val)  argument
70 #define getsda(adap) adap->getsda(adap->data)  argument
71 #define getscl(adap) adap->getscl(adap->data)  argument
73 static inline void sdalo(struct i2c_algo_bit_data *adap)  in sdalo()  argument
75 	setsda(adap,0);  in sdalo()
76 	udelay(adap->udelay);  in sdalo()
79 static inline void sdahi(struct i2c_algo_bit_data *adap)  in sdahi()  argument
81 	setsda(adap,1);  in sdahi()
82 	udelay(adap->udelay);  in sdahi()
85 static inline void scllo(struct i2c_algo_bit_data *adap)  in scllo()  argument
87 	setscl(adap,0);  in scllo()
88 	udelay(adap->udelay);  in scllo()
98 static inline int sclhi(struct i2c_algo_bit_data *adap)  in sclhi()  argument
102 	setscl(adap,1);  in sclhi()
104 	udelay(adap->udelay);  in sclhi()
107 	if (adap->getscl == NULL )  in sclhi()
110  	while (! getscl(adap) ) {	  in sclhi()
116 		setscl(adap,1);  in sclhi()
117 		if (time_after_eq(jiffies, start+adap->timeout)) {  in sclhi()
132 static void i2c_start(struct i2c_algo_bit_data *adap)   in i2c_start()  argument
136 	sdalo(adap);  in i2c_start()
137 	scllo(adap);  in i2c_start()
140 static void i2c_repstart(struct i2c_algo_bit_data *adap)   in i2c_repstart()  argument
144 	setsda(adap,1);  in i2c_repstart()
145 	setscl(adap,1);  in i2c_repstart()
146 	udelay(adap->udelay);  in i2c_repstart()
148 	sdalo(adap);  in i2c_repstart()
149 	scllo(adap);  in i2c_repstart()
153 static void i2c_stop(struct i2c_algo_bit_data *adap)   in i2c_stop()  argument
157 	sdalo(adap);  in i2c_stop()
158 	sclhi(adap);   in i2c_stop()
159 	sdahi(adap);  in i2c_stop()
176 	struct i2c_algo_bit_data *adap = i2c_adap->algo_data;  in i2c_outb()  local
182 		setsda(adap,sb);  in i2c_outb()
183 		udelay(adap->udelay);  in i2c_outb()
185 		if (sclhi(adap)<0) { /* timed out */  in i2c_outb()
186 			sdahi(adap); /* we don't want to block the net */  in i2c_outb()
192 		setscl(adap, 0 );  in i2c_outb()
193 		udelay(adap->udelay);  in i2c_outb()
195 	sdahi(adap);  in i2c_outb()
196 	if (sclhi(adap)<0){ /* timeout */  in i2c_outb()
200 	ack=getsda(adap);	/* ack: sda is pulled low ->success.	 */  in i2c_outb()
205 	scllo(adap);  in i2c_outb()
217 	struct i2c_algo_bit_data *adap = i2c_adap->algo_data;  in i2c_inb()  local
222 	sdahi(adap);  in i2c_inb()
224 		if (sclhi(adap)<0) { /* timeout */  in i2c_inb()
228 		if ( getsda(adap) )   in i2c_inb()
230 		scllo(adap);  in i2c_inb()
241 static int test_bus(struct i2c_algo_bit_data *adap, char* name) {  in test_bus()  argument
243 	sda=getsda(adap);  in test_bus()
244 	if (adap->getscl==NULL) {  in test_bus()
248 	scl=getscl(adap);  in test_bus()
250 	       name,getscl(adap),getsda(adap));  in test_bus()
255 	sdalo(adap);  in test_bus()
256 	printk("i2c-algo-bit.o:1 scl: %d  sda: %d \n",getscl(adap),  in test_bus()
257 	       getsda(adap));  in test_bus()
258 	if ( 0 != getsda(adap) ) {  in test_bus()
260 		sdahi(adap);  in test_bus()
263 	if ( 0 == getscl(adap) ) {  in test_bus()
268 	sdahi(adap);  in test_bus()
269 	printk("i2c-algo-bit.o:2 scl: %d  sda: %d \n",getscl(adap),  in test_bus()
270 	       getsda(adap));  in test_bus()
271 	if ( 0 == getsda(adap) ) {  in test_bus()
273 		sdahi(adap);  in test_bus()
276 	if ( 0 == getscl(adap) ) {  in test_bus()
281 	scllo(adap);  in test_bus()
282 	printk("i2c-algo-bit.o:3 scl: %d  sda: %d \n",getscl(adap),  in test_bus()
283 	       getsda(adap));  in test_bus()
284 	if ( 0 != getscl(adap) ) {  in test_bus()
286 		sclhi(adap);  in test_bus()
289 	if ( 0 == getsda(adap) ) {  in test_bus()
294 	sclhi(adap);  in test_bus()
295 	printk("i2c-algo-bit.o:4 scl: %d  sda: %d \n",getscl(adap),  in test_bus()
296 	       getsda(adap));  in test_bus()
297 	if ( 0 == getscl(adap) ) {  in test_bus()
299 		sclhi(adap);  in test_bus()
302 	if ( 0 == getsda(adap) ) {  in test_bus()
310 	sdahi(adap);  in test_bus()
311 	sclhi(adap);  in test_bus()
328 	struct i2c_algo_bit_data *adap = i2c_adap->algo_data;  in try_address()  local
334 		i2c_stop(adap);  in try_address()
338 		i2c_start(adap);  in try_address()
339 		udelay(adap->udelay);  in try_address()
348 	struct i2c_algo_bit_data *adap = i2c_adap->algo_data;  in sendbytes()  local
366 			i2c_stop(adap);  in sendbytes()
379 	struct i2c_algo_bit_data *adap = i2c_adap->algo_data;  in readbytes()  local
392 			sdalo(adap);  in readbytes()
395 			sdahi(adap);	/* neg. ack on last byte */  in readbytes()
398 		if (sclhi(adap)<0) {	/* timeout */  in readbytes()
399 			sdahi(adap);  in readbytes()
403 		scllo(adap);  in readbytes()
404 		sdahi(adap);  in readbytes()
423 	struct i2c_algo_bit_data *adap = i2c_adap->algo_data;  in bit_doAddress()  local
445 			i2c_repstart(adap);  in bit_doAddress()
472 	struct i2c_algo_bit_data *adap = i2c_adap->algo_data;  in bit_xfer()  local
476 	i2c_start(adap);  in bit_xfer()
481 				i2c_repstart(adap);  in bit_xfer()
506 	i2c_stop(adap);  in bit_xfer()
516 static u32 bit_func(struct i2c_adapter *adap)  in bit_func()  argument
536 int i2c_bit_add_bus(struct i2c_adapter *adap)  in i2c_bit_add_bus()  argument
539 	struct i2c_algo_bit_data *bit_adap = adap->algo_data;  in i2c_bit_add_bus()
542 		int ret = test_bus(bit_adap, adap->name);  in i2c_bit_add_bus()
548 	            adap->name));  in i2c_bit_add_bus()
552 	adap->id |= i2c_bit_algo.id;  in i2c_bit_add_bus()
553 	adap->algo = &i2c_bit_algo;  in i2c_bit_add_bus()
555 	adap->timeout = 100;	/* default values, should	*/  in i2c_bit_add_bus()
556 	adap->retries = 3;	/* be replaced by defines	*/  in i2c_bit_add_bus()
562 		       adap->name);  in i2c_bit_add_bus()
565 			ack = i2c_outb(adap,i);  in i2c_bit_add_bus()
579 	return i2c_add_adapter(adap);  in i2c_bit_add_bus()
583 int i2c_bit_del_bus(struct i2c_adapter *adap)  in i2c_bit_del_bus()  argument
587 	if ((res = i2c_del_adapter(adap)) < 0)  in i2c_bit_del_bus()
590 	DEB2(printk("i2c-algo-bit.o: adapter unregistered: %s\n",adap->name));  in i2c_bit_del_bus()