114 static int i2c_gpio_set(struct ipath_devdata *dd,  in i2c_gpio_set()  argument
121 	gpioval = &dd->ipath_gpio_out;  in i2c_gpio_set()
124 		dir_mask = dd->ipath_gpio_scl;  in i2c_gpio_set()
125 		out_mask = (1UL << dd->ipath_gpio_scl_num);  in i2c_gpio_set()
127 		dir_mask = dd->ipath_gpio_sda;  in i2c_gpio_set()
128 		out_mask = (1UL << dd->ipath_gpio_sda_num);  in i2c_gpio_set()
131 	spin_lock_irqsave(&dd->ipath_gpio_lock, flags);  in i2c_gpio_set()
134 		dd->ipath_extctrl &= ~dir_mask;  in i2c_gpio_set()
137 		dd->ipath_extctrl |= dir_mask;  in i2c_gpio_set()
139 	ipath_write_kreg(dd, dd->ipath_kregs->kr_extctrl, dd->ipath_extctrl);  in i2c_gpio_set()
147 	ipath_write_kreg(dd, dd->ipath_kregs->kr_gpio_out, *gpioval);  in i2c_gpio_set()
148 	spin_unlock_irqrestore(&dd->ipath_gpio_lock, flags);  in i2c_gpio_set()
162 static int i2c_gpio_get(struct ipath_devdata *dd,  in i2c_gpio_get()  argument
178 		mask = dd->ipath_gpio_scl;  in i2c_gpio_get()
180 		mask = dd->ipath_gpio_sda;  in i2c_gpio_get()
182 	spin_lock_irqsave(&dd->ipath_gpio_lock, flags);  in i2c_gpio_get()
183 	dd->ipath_extctrl &= ~mask;  in i2c_gpio_get()
184 	ipath_write_kreg(dd, dd->ipath_kregs->kr_extctrl, dd->ipath_extctrl);  in i2c_gpio_get()
189 	read_val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_extstatus);  in i2c_gpio_get()
190 	spin_unlock_irqrestore(&dd->ipath_gpio_lock, flags);  in i2c_gpio_get()
212 static void i2c_wait_for_writes(struct ipath_devdata *dd)  in i2c_wait_for_writes()  argument
214 	(void)ipath_read_kreg32(dd, dd->ipath_kregs->kr_scratch);  in i2c_wait_for_writes()
218 static void scl_out(struct ipath_devdata *dd, u8 bit)  in scl_out()  argument
221 	i2c_gpio_set(dd, i2c_line_scl, bit ? i2c_line_high : i2c_line_low);  in scl_out()
223 	i2c_wait_for_writes(dd);  in scl_out()
226 static void sda_out(struct ipath_devdata *dd, u8 bit)  in sda_out()  argument
228 	i2c_gpio_set(dd, i2c_line_sda, bit ? i2c_line_high : i2c_line_low);  in sda_out()
230 	i2c_wait_for_writes(dd);  in sda_out()
233 static u8 sda_in(struct ipath_devdata *dd, int wait)  in sda_in()  argument
237 	if (i2c_gpio_get(dd, i2c_line_sda, &bit))  in sda_in()
241 		i2c_wait_for_writes(dd);  in sda_in()
250 static int i2c_ackrcv(struct ipath_devdata *dd)  in i2c_ackrcv()  argument
256 	ack_received = sda_in(dd, 1);  in i2c_ackrcv()
257 	scl_out(dd, i2c_line_high);  in i2c_ackrcv()
258 	ack_received = sda_in(dd, 1) == 0;  in i2c_ackrcv()
259 	scl_out(dd, i2c_line_low);  in i2c_ackrcv()
269 static int rd_byte(struct ipath_devdata *dd)  in rd_byte()  argument
277 		scl_out(dd, i2c_line_high);  in rd_byte()
278 		data |= sda_in(dd, 0);  in rd_byte()
279 		scl_out(dd, i2c_line_low);  in rd_byte()
291 static int wr_byte(struct ipath_devdata *dd, u8 data)  in wr_byte()  argument
298 		sda_out(dd, bit);  in wr_byte()
299 		scl_out(dd, i2c_line_high);  in wr_byte()
300 		scl_out(dd, i2c_line_low);  in wr_byte()
302 	return (!i2c_ackrcv(dd)) ? 1 : 0;  in wr_byte()
305 static void send_ack(struct ipath_devdata *dd)  in send_ack()  argument
307 	sda_out(dd, i2c_line_low);  in send_ack()
308 	scl_out(dd, i2c_line_high);  in send_ack()
309 	scl_out(dd, i2c_line_low);  in send_ack()
310 	sda_out(dd, i2c_line_high);  in send_ack()
320 static int i2c_startcmd(struct ipath_devdata *dd, u8 offset_dir)  in i2c_startcmd()  argument
325 	sda_out(dd, i2c_line_high);  in i2c_startcmd()
326 	scl_out(dd, i2c_line_high);  in i2c_startcmd()
327 	sda_out(dd, i2c_line_low);  in i2c_startcmd()
328 	scl_out(dd, i2c_line_low);  in i2c_startcmd()
331 	res = wr_byte(dd, offset_dir);  in i2c_startcmd()
345 static void stop_cmd(struct ipath_devdata *dd)  in stop_cmd()  argument
347 	scl_out(dd, i2c_line_low);  in stop_cmd()
348 	sda_out(dd, i2c_line_low);  in stop_cmd()
349 	scl_out(dd, i2c_line_high);  in stop_cmd()
350 	sda_out(dd, i2c_line_high);  in stop_cmd()
359 static int eeprom_reset(struct ipath_devdata *dd)  in eeprom_reset()  argument
362 	u64 *gpioval = &dd->ipath_gpio_out;  in eeprom_reset()
366 	spin_lock_irqsave(&dd->ipath_gpio_lock, flags);  in eeprom_reset()
368 	dd->ipath_extctrl = ipath_read_kreg64(dd, dd->ipath_kregs->kr_extctrl);  in eeprom_reset()
369 	*gpioval = ipath_read_kreg64(dd, dd->ipath_kregs->kr_gpio_out);  in eeprom_reset()
370 	spin_unlock_irqrestore(&dd->ipath_gpio_lock, flags);  in eeprom_reset()
380 	scl_out(dd, i2c_line_low);  in eeprom_reset()
381 	sda_out(dd, i2c_line_high);  in eeprom_reset()
385 		scl_out(dd, i2c_line_high);  in eeprom_reset()
388 		if (sda_in(dd, 0)) {  in eeprom_reset()
389 			sda_out(dd, i2c_line_low);  in eeprom_reset()
390 			scl_out(dd, i2c_line_low);  in eeprom_reset()
392 			scl_out(dd, i2c_line_high);  in eeprom_reset()
393 			sda_out(dd, i2c_line_high);  in eeprom_reset()
398 		scl_out(dd, i2c_line_low);  in eeprom_reset()
412 static int i2c_probe(struct ipath_devdata *dd, int devaddr)  in i2c_probe()  argument
416 	ret = eeprom_reset(dd);  in i2c_probe()
418 		ipath_dev_err(dd, "Failed reset probing device 0x%02X\n",  in i2c_probe()
426 	ret = i2c_startcmd(dd, devaddr | READ_CMD);  in i2c_probe()
437 		data = rd_byte(dd);  in i2c_probe()
438 		stop_cmd(dd);  in i2c_probe()
453 static struct i2c_chain_desc *ipath_i2c_type(struct ipath_devdata *dd)  in ipath_i2c_type()  argument
458 	idx = dd->ipath_i2c_chain_type - 1;  in ipath_i2c_type()
465 		if (!i2c_probe(dd, i2c_chains[idx].probe_dev))  in ipath_i2c_type()
475 		eeprom_reset(dd);  in ipath_i2c_type()
480 		dd->ipath_i2c_chain_type = idx + 1;  in ipath_i2c_type()
485 static int ipath_eeprom_internal_read(struct ipath_devdata *dd,  in ipath_eeprom_internal_read()  argument
493 	icd = ipath_i2c_type(dd);  in ipath_eeprom_internal_read()
501 		ret = i2c_startcmd(dd, eeprom_offset);  in ipath_eeprom_internal_read()
505 		if (i2c_startcmd(dd, icd->eeprom_dev | WRITE_CMD)) {  in ipath_eeprom_internal_read()
507 			stop_cmd(dd);  in ipath_eeprom_internal_read()
511 		ret = wr_byte(dd, eeprom_offset);  in ipath_eeprom_internal_read()
512 		stop_cmd(dd);  in ipath_eeprom_internal_read()
514 			ipath_dev_err(dd, "Failed to write EEPROM address\n");  in ipath_eeprom_internal_read()
518 		ret = i2c_startcmd(dd, icd->eeprom_dev | READ_CMD);  in ipath_eeprom_internal_read()
522 		stop_cmd(dd);  in ipath_eeprom_internal_read()
533 		*bp++ = rd_byte(dd);  in ipath_eeprom_internal_read()
536 			send_ack(dd);  in ipath_eeprom_internal_read()
539 	stop_cmd(dd);  in ipath_eeprom_internal_read()
547 static int ipath_eeprom_internal_write(struct ipath_devdata *dd, u8 eeprom_offset,  in ipath_eeprom_internal_write()  argument
557 	icd = ipath_i2c_type(dd);  in ipath_eeprom_internal_write()
563 			if (i2c_startcmd(dd,  in ipath_eeprom_internal_write()
571 			if (i2c_startcmd(dd, icd->eeprom_dev | WRITE_CMD)) {  in ipath_eeprom_internal_write()
575 			ret = wr_byte(dd, eeprom_offset);  in ipath_eeprom_internal_write()
577 				ipath_dev_err(dd, "Failed to write EEPROM "  in ipath_eeprom_internal_write()
588 			if (wr_byte(dd, *bp++)) {  in ipath_eeprom_internal_write()
596 		stop_cmd(dd);  in ipath_eeprom_internal_write()
610 		while (i2c_startcmd(dd, icd->eeprom_dev | READ_CMD)) {  in ipath_eeprom_internal_write()
611 			stop_cmd(dd);  in ipath_eeprom_internal_write()
619 		rd_byte(dd);  in ipath_eeprom_internal_write()
620 		stop_cmd(dd);  in ipath_eeprom_internal_write()
627 	stop_cmd(dd);  in ipath_eeprom_internal_write()
641 int ipath_eeprom_read(struct ipath_devdata *dd, u8 eeprom_offset,  in ipath_eeprom_read()  argument
646 	ret = mutex_lock_interruptible(&dd->ipath_eep_lock);  in ipath_eeprom_read()
648 		ret = ipath_eeprom_internal_read(dd, eeprom_offset, buff, len);  in ipath_eeprom_read()
649 		mutex_unlock(&dd->ipath_eep_lock);  in ipath_eeprom_read()
662 int ipath_eeprom_write(struct ipath_devdata *dd, u8 eeprom_offset,  in ipath_eeprom_write()  argument
667 	ret = mutex_lock_interruptible(&dd->ipath_eep_lock);  in ipath_eeprom_write()
669 		ret = ipath_eeprom_internal_write(dd, eeprom_offset, buff, len);  in ipath_eeprom_write()
670 		mutex_unlock(&dd->ipath_eep_lock);  in ipath_eeprom_write()
706 void ipath_get_eeprom_info(struct ipath_devdata *dd)  in ipath_get_eeprom_info()  argument
713 	int t = dd->ipath_unit;  in ipath_get_eeprom_info()
718 		dd->ipath_guid = dd0->ipath_guid;  in ipath_get_eeprom_info()
719 		bguid = (u8 *) & dd->ipath_guid;  in ipath_get_eeprom_info()
727 						dd,  in ipath_get_eeprom_info()
731 					dd->ipath_guid = 0;  in ipath_get_eeprom_info()
738 		dd->ipath_nguid = 1;  in ipath_get_eeprom_info()
743 			  (unsigned long long) be64_to_cpu(dd->ipath_guid));  in ipath_get_eeprom_info()
754 		ipath_dev_err(dd, "Couldn't allocate memory to read %u "  in ipath_get_eeprom_info()
759 	mutex_lock(&dd->ipath_eep_lock);  in ipath_get_eeprom_info()
760 	eep_stat = ipath_eeprom_internal_read(dd, 0, buf, len);  in ipath_get_eeprom_info()
761 	mutex_unlock(&dd->ipath_eep_lock);  in ipath_get_eeprom_info()
764 		ipath_dev_err(dd, "Failed reading GUID from eeprom\n");  in ipath_get_eeprom_info()
771 		dev_info(&dd->pcidev->dev, "Bad I2C flash checksum: "  in ipath_get_eeprom_info()
777 		ipath_dev_err(dd, "Invalid GUID %llx from flash; "  in ipath_get_eeprom_info()
786 		dev_info(&dd->pcidev->dev, "Warning, GUID %llx is "  in ipath_get_eeprom_info()
804 	dd->ipath_guid = guid;  in ipath_get_eeprom_info()
805 	dd->ipath_nguid = ifp->if_numguid;  in ipath_get_eeprom_info()
816 		char *snp = dd->ipath_serial;  in ipath_get_eeprom_info()
821 		len = (sizeof dd->ipath_serial) - len;  in ipath_get_eeprom_info()
827 		memcpy(dd->ipath_serial, ifp->if_serial,  in ipath_get_eeprom_info()
830 		ipath_dev_err(dd, "Board SN %s did not pass functional "  in ipath_get_eeprom_info()
831 			"test: %s\n", dd->ipath_serial,  in ipath_get_eeprom_info()
835 		   (unsigned long long) be64_to_cpu(dd->ipath_guid));  in ipath_get_eeprom_info()
837 	memcpy(&dd->ipath_eep_st_errs, &ifp->if_errcntp, IPATH_EEP_LOG_CNT);  in ipath_get_eeprom_info()
843 	atomic_set(&dd->ipath_active_time, 0);  in ipath_get_eeprom_info()
844 	dd->ipath_eep_hrs = ifp->if_powerhour[0] | (ifp->if_powerhour[1] << 8);  in ipath_get_eeprom_info()
865 int ipath_update_eeprom_log(struct ipath_devdata *dd)  in ipath_update_eeprom_log()  argument
878 		if (dd->ipath_eep_st_new_errs[idx]) {  in ipath_update_eeprom_log()
883 	new_time = atomic_read(&dd->ipath_active_time);  in ipath_update_eeprom_log()
898 		ipath_dev_err(dd, "Couldn't allocate memory to read %u "  in ipath_update_eeprom_log()
906 	ret = mutex_lock_interruptible(&dd->ipath_eep_lock);  in ipath_update_eeprom_log()
908 		ipath_dev_err(dd, "Unable to acquire EEPROM for logging\n");  in ipath_update_eeprom_log()
911 	ret = ipath_eeprom_internal_read(dd, 0, buf, len);  in ipath_update_eeprom_log()
913 		mutex_unlock(&dd->ipath_eep_lock);  in ipath_update_eeprom_log()
914 		ipath_dev_err(dd, "Unable read EEPROM for logging\n");  in ipath_update_eeprom_log()
921 		mutex_unlock(&dd->ipath_eep_lock);  in ipath_update_eeprom_log()
922 		ipath_dev_err(dd, "EEPROM cks err (0x%02X, S/B 0x%02X)\n",  in ipath_update_eeprom_log()
928 	spin_lock_irqsave(&dd->ipath_eep_st_lock, flags);  in ipath_update_eeprom_log()
930 		int new_val = dd->ipath_eep_st_new_errs[idx];  in ipath_update_eeprom_log()
952 			dd->ipath_eep_st_errs[idx] = new_val;  in ipath_update_eeprom_log()
953 			dd->ipath_eep_st_new_errs[idx] = 0;  in ipath_update_eeprom_log()
965 		atomic_sub((new_hrs * 3600), &dd->ipath_active_time);  in ipath_update_eeprom_log()
966 		new_hrs += dd->ipath_eep_hrs;  in ipath_update_eeprom_log()
969 		dd->ipath_eep_hrs = new_hrs;  in ipath_update_eeprom_log()
985 	spin_unlock_irqrestore(&dd->ipath_eep_st_lock, flags);  in ipath_update_eeprom_log()
989 		ret = ipath_eeprom_internal_write(dd, 0, buf, hi_water + 1);  in ipath_update_eeprom_log()
991 	mutex_unlock(&dd->ipath_eep_lock);  in ipath_update_eeprom_log()
993 		ipath_dev_err(dd, "Failed updating EEPROM\n");  in ipath_update_eeprom_log()
1015 void ipath_inc_eeprom_err(struct ipath_devdata *dd, u32 eidx, u32 incr)  in ipath_inc_eeprom_err()  argument
1020 	spin_lock_irqsave(&dd->ipath_eep_st_lock, flags);  in ipath_inc_eeprom_err()
1021 	new_val = dd->ipath_eep_st_new_errs[eidx] + incr;  in ipath_inc_eeprom_err()
1024 	dd->ipath_eep_st_new_errs[eidx] = new_val;  in ipath_inc_eeprom_err()
1025 	spin_unlock_irqrestore(&dd->ipath_eep_st_lock, flags);  in ipath_inc_eeprom_err()
1029 static int ipath_tempsense_internal_read(struct ipath_devdata *dd, u8 regnum)  in ipath_tempsense_internal_read()  argument
1036 	icd = ipath_i2c_type(dd);  in ipath_tempsense_internal_read()
1046 	if (i2c_startcmd(dd, icd->temp_dev | WRITE_CMD)) {  in ipath_tempsense_internal_read()
1048 		stop_cmd(dd);  in ipath_tempsense_internal_read()
1052 	ret = wr_byte(dd, regnum);  in ipath_tempsense_internal_read()
1053 	stop_cmd(dd);  in ipath_tempsense_internal_read()
1055 		ipath_dev_err(dd, "Failed tempsense WR command %02X\n",  in ipath_tempsense_internal_read()
1060 	if (i2c_startcmd(dd, icd->temp_dev | READ_CMD)) {  in ipath_tempsense_internal_read()
1062 		stop_cmd(dd);  in ipath_tempsense_internal_read()
1069 	ret = rd_byte(dd);  in ipath_tempsense_internal_read()
1070 	stop_cmd(dd);  in ipath_tempsense_internal_read()
1085 int ipath_tempsense_read(struct ipath_devdata *dd, u8 regnum)  in ipath_tempsense_read()  argument
1096 	ret = mutex_lock_interruptible(&dd->ipath_eep_lock);  in ipath_tempsense_read()
1098 		ret = ipath_tempsense_internal_read(dd, regnum);  in ipath_tempsense_read()
1099 		mutex_unlock(&dd->ipath_eep_lock);  in ipath_tempsense_read()
1111 static int ipath_tempsense_internal_write(struct ipath_devdata *dd,  in ipath_tempsense_internal_write()  argument
1117 	icd = ipath_i2c_type(dd);  in ipath_tempsense_internal_write()
1126 	if (i2c_startcmd(dd, icd->temp_dev | WRITE_CMD)) {  in ipath_tempsense_internal_write()
1128 		stop_cmd(dd);  in ipath_tempsense_internal_write()
1132 	ret = wr_byte(dd, regnum);  in ipath_tempsense_internal_write()
1134 		stop_cmd(dd);  in ipath_tempsense_internal_write()
1135 		ipath_dev_err(dd, "Failed to write tempsense command %02X\n",  in ipath_tempsense_internal_write()
1140 	ret = wr_byte(dd, data);  in ipath_tempsense_internal_write()
1141 	stop_cmd(dd);  in ipath_tempsense_internal_write()
1142 	ret = i2c_startcmd(dd, icd->temp_dev | READ_CMD);  in ipath_tempsense_internal_write()
1144 		ipath_dev_err(dd, "Failed tempsense data wrt to %02X\n",  in ipath_tempsense_internal_write()
1163 int ipath_tempsense_write(struct ipath_devdata *dd, u8 regnum, u8 data)  in ipath_tempsense_write()  argument
1170 	ret = mutex_lock_interruptible(&dd->ipath_eep_lock);  in ipath_tempsense_write()
1172 		ret = ipath_tempsense_internal_write(dd, regnum, data);  in ipath_tempsense_write()
1173 		mutex_unlock(&dd->ipath_eep_lock);  in ipath_tempsense_write()