21  * NVRAM detection and reading.
35  *  Get host setup from NVRAM.
37 void sym_nvram_setup_host(struct Scsi_Host *shost, struct sym_hcb *np, struct sym_nvram *nvram)  in sym_nvram_setup_host()  argument
41 	 *  and miscellaneous host flags from NVRAM.  in sym_nvram_setup_host()
43 	switch (nvram->type) {  in sym_nvram_setup_host()
45 		if (!(nvram->data.Symbios.flags & SYMBIOS_PARITY_ENABLE))  in sym_nvram_setup_host()
47 		np->myaddr = nvram->data.Symbios.host_id & 0x0f;  in sym_nvram_setup_host()
48 		if (nvram->data.Symbios.flags & SYMBIOS_VERBOSE_MSGS)  in sym_nvram_setup_host()
50 		if (nvram->data.Symbios.flags1 & SYMBIOS_SCAN_HI_LO)  in sym_nvram_setup_host()
52 		if (nvram->data.Symbios.flags2 & SYMBIOS_AVOID_BUS_RESET)  in sym_nvram_setup_host()
56 		np->myaddr = nvram->data.Tekram.host_id & 0x0f;  in sym_nvram_setup_host()
60 		if (nvram->data.parisc.host_id != -1)  in sym_nvram_setup_host()
61 			np->myaddr = nvram->data.parisc.host_id;  in sym_nvram_setup_host()
62 		if (nvram->data.parisc.factor != -1)  in sym_nvram_setup_host()
63 			np->minsync = nvram->data.parisc.factor;  in sym_nvram_setup_host()
64 		if (nvram->data.parisc.width != -1)  in sym_nvram_setup_host()
65 			np->maxwide = nvram->data.parisc.width;  in sym_nvram_setup_host()
66 		switch (nvram->data.parisc.mode) {  in sym_nvram_setup_host()
79  *  Get target set-up from Symbios format NVRAM.
82 sym_Symbios_setup_target(struct sym_tcb *tp, int target, Symbios_nvram *nvram)  in sym_Symbios_setup_target()  argument
84 	Symbios_target *tn = &nvram->target[target];  in sym_Symbios_setup_target()
103  *  Get target set-up from Tekram format NVRAM.
106 sym_Tekram_setup_target(struct sym_tcb *tp, int target, Tekram_nvram *nvram)  in sym_Tekram_setup_target()  argument
108 	struct Tekram_target *tn = &nvram->target[target];  in sym_Tekram_setup_target()
111 		tp->usrtags = 2 << nvram->max_tags_index;  in sym_Tekram_setup_target()
123  *  Get target setup from NVRAM.
141  *  Dump Symbios format NVRAM for debugging purpose.
143 static void sym_display_Symbios_nvram(struct sym_device *np, Symbios_nvram *nvram)  in sym_display_Symbios_nvram()  argument
147 	/* display Symbios nvram host data */  in sym_display_Symbios_nvram()
149 		sym_name(np), nvram->host_id & 0x0f,  in sym_display_Symbios_nvram()
150 		(nvram->flags  & SYMBIOS_SCAM_ENABLE)	? " SCAM"	:"",  in sym_display_Symbios_nvram()
151 		(nvram->flags  & SYMBIOS_PARITY_ENABLE)	? " PARITY"	:"",  in sym_display_Symbios_nvram()
152 		(nvram->flags  & SYMBIOS_VERBOSE_MSGS)	? " VERBOSE"	:"",   in sym_display_Symbios_nvram()
153 		(nvram->flags  & SYMBIOS_CHS_MAPPING)	? " CHS_ALT"	:"",   in sym_display_Symbios_nvram()
154 		(nvram->flags2 & SYMBIOS_AVOID_BUS_RESET)?" NO_RESET"	:"",  in sym_display_Symbios_nvram()
155 		(nvram->flags1 & SYMBIOS_SCAN_HI_LO)	? " HI_LO"	:"");  in sym_display_Symbios_nvram()
157 	/* display Symbios nvram drive data */  in sym_display_Symbios_nvram()
159 		struct Symbios_target *tn = &nvram->target[i];  in sym_display_Symbios_nvram()
173  *  Dump TEKRAM format NVRAM for debugging purpose.
175 static void sym_display_Tekram_nvram(struct sym_device *np, Tekram_nvram *nvram)  in sym_display_Tekram_nvram()  argument
180 	/* display Tekram nvram host data */  in sym_display_Tekram_nvram()
181 	tags = 2 << nvram->max_tags_index;  in sym_display_Tekram_nvram()
183 	if (nvram->boot_delay_index < 6)  in sym_display_Tekram_nvram()
184 		boot_delay = Tekram_boot_delay[nvram->boot_delay_index];  in sym_display_Tekram_nvram()
185 	switch ((nvram->flags & TEKRAM_REMOVABLE_FLAGS) >> 6) {  in sym_display_Tekram_nvram()
193 		sym_name(np), nvram->host_id & 0x0f,  in sym_display_Tekram_nvram()
194 		(nvram->flags1 & SYMBIOS_SCAM_ENABLE)	? " SCAM"	:"",  in sym_display_Tekram_nvram()
195 		(nvram->flags & TEKRAM_MORE_THAN_2_DRIVES) ? " >2DRIVES":"",  in sym_display_Tekram_nvram()
196 		(nvram->flags & TEKRAM_DRIVES_SUP_1GB)	? " >1GB"	:"",  in sym_display_Tekram_nvram()
197 		(nvram->flags & TEKRAM_RESET_ON_POWER_ON) ? " RESET"	:"",  in sym_display_Tekram_nvram()
198 		(nvram->flags & TEKRAM_ACTIVE_NEGATION)	? " ACT_NEG"	:"",  in sym_display_Tekram_nvram()
199 		(nvram->flags & TEKRAM_IMMEDIATE_SEEK)	? " IMM_SEEK"	:"",  in sym_display_Tekram_nvram()
200 		(nvram->flags & TEKRAM_SCAN_LUNS)	? " SCAN_LUNS"	:"",  in sym_display_Tekram_nvram()
201 		(nvram->flags1 & TEKRAM_F2_F6_ENABLED)	? " F2_F6"	:"",  in sym_display_Tekram_nvram()
204 	/* display Tekram nvram drive data */  in sym_display_Tekram_nvram()
207 		struct Tekram_target *tn = &nvram->target[i];  in sym_display_Tekram_nvram()
222 …d sym_display_Symbios_nvram(struct sym_device *np, Symbios_nvram *nvram) { (void)np; (void)nvram; }  in sym_display_Symbios_nvram()  argument
223 …oid sym_display_Tekram_nvram(struct sym_device *np, Tekram_nvram *nvram) { (void)np; (void)nvram; }  in sym_display_Tekram_nvram()  argument
232  *  Symbios NVRAM wiring now also used by Tekram.
268  *  Send START condition to NVRAM to wake it up.
279  *  Send STOP condition to NVRAM - puts NVRAM to sleep... ZZzzzz!!
288  *  Read or write a bit to the NVRAM,
303  *  Output an ACK to the NVRAM after reading,
315  *  Input an ACK from NVRAM after writing,
327  *  WRITE a byte to the NVRAM and then get an ACK to see it was accepted OK,
342  *  READ a byte from the NVRAM and then send an ACK to say we have got it,
381 	/* this is to set NVRAM into a known state with GPIO0/1 both low */  in sym_write_S24C16_nvram()
386 	/* now set NVRAM inactive with GPIO0/1 both high */  in sym_write_S24C16_nvram()
389 	/* NVRAM has to be written in segments of 16 bytes */  in sym_write_S24C16_nvram()
407 	/* return GPIO0/1 to original states after having accessed NVRAM */  in sym_write_S24C16_nvram()
435 	/* this is to set NVRAM into a known state with GPIO0/1 both low */  in sym_read_S24C16_nvram()
440 	/* now set NVRAM inactive with GPIO0/1 both high */  in sym_read_S24C16_nvram()
443 	/* activate NVRAM */  in sym_read_S24C16_nvram()
471 	/* input all requested data - only part of total NVRAM */  in sym_read_S24C16_nvram()
475 	/* finally put NVRAM back in inactive mode */  in sym_read_S24C16_nvram()
481 	/* return GPIO0/1 to original states after having accessed NVRAM */  in sym_read_S24C16_nvram()
494  *  Try reading Symbios NVRAM.
497 static int sym_read_Symbios_nvram(struct sym_device *np, Symbios_nvram *nvram)  in sym_read_Symbios_nvram()  argument
500 	u_char *data = (u_char *) nvram;  in sym_read_Symbios_nvram()
501 	int len  = sizeof(*nvram);  in sym_read_Symbios_nvram()
509 	/* check valid NVRAM signature, verify byte count and checksum */  in sym_read_Symbios_nvram()
510 	if (nvram->type != 0 ||  in sym_read_Symbios_nvram()
511 	    memcmp(nvram->trailer, Symbios_trailer, 6) ||  in sym_read_Symbios_nvram()
512 	    nvram->byte_count != len - 12)  in sym_read_Symbios_nvram()
518 	if (csum != nvram->checksum)  in sym_read_Symbios_nvram()
547  *  Read bit from NVRAM
576  *  Send STOP condition to NVRAM - puts NVRAM to sleep... ZZZzzz!!
589  *  Send read command and address to NVRAM
604  *  READ 2 bytes from the NVRAM
624  *  Read Tekram NvRAM data.
645  *  Try reading 93C46 Tekram NVRAM.
647 static int sym_read_T93C46_nvram(struct sym_device *np, Tekram_nvram *nvram)  in sym_read_T93C46_nvram()  argument
664 	/* input all of NVRAM, 64 words */  in sym_read_T93C46_nvram()
665 	retv = T93C46_Read_Data(np, (u_short *) nvram,  in sym_read_T93C46_nvram()
666 				sizeof(*nvram) / sizeof(short), &gpreg);  in sym_read_T93C46_nvram()
668 	/* return GPIO0/1/2/4 to original states after having accessed NVRAM */  in sym_read_T93C46_nvram()
676  *  Try reading Tekram NVRAM.
679 static int sym_read_Tekram_nvram (struct sym_device *np, Tekram_nvram *nvram)  in sym_read_Tekram_nvram()  argument
681 	u_char *data = (u_char *) nvram;  in sym_read_Tekram_nvram()
682 	int len = sizeof(*nvram);  in sym_read_Tekram_nvram()
700 		x = sym_read_T93C46_nvram(np, nvram);  in sym_read_Tekram_nvram()
739  *  Try reading Symbios or Tekram NVRAM
759 		return "Symbios NVRAM";  in sym_nvram_type()
761 		return "Tekram NVRAM";  in sym_nvram_type()
765 		return "No NVRAM";  in sym_nvram_type()