1 // SPDX-License-Identifier: GPL-2.0-only
3  *  (C) 2001-2004  Dave Jones.
13  *   Present in Samuel 2 (steppings 1-7 only) (C5B), and Ezra (C5C).
16  *   It is present in Ezra-T (C5M), Nehemiah (C5X) and above.
192 			/* Dummy op - must do something useless after P_LVL3  in do_powersaver()
210 		/* Dummy op - must do something useless after P_LVL3 read */  in do_powersaver()
229 			/* Dummy op - must do something useless after P_LVL3  in do_powersaver()
260 	if (mult == -1)  in longhaul_setstate()
261 		return -EINVAL;  in longhaul_setstate()
265 		return -EINVAL;  in longhaul_setstate()
287 	    || ((pr != NULL) && pr->flags.bm_control))) {  in longhaul_setstate()
292 			bm_timeout--;  in longhaul_setstate()
301 	} else if ((pr != NULL) && pr->flags.bm_control) {  in longhaul_setstate()
316 	 * Longhaul v2 appears in Samuel2 Steppings 1->7 [C5B] and Ezra [C5C]  in longhaul_setstate()
318 	 * Longhaul v3 (aka Powersaver). (Ezra-T [C5M] & Nehemiah [C5N])  in longhaul_setstate()
327 			do_powersaver(cx->address, mults_index, dir);  in longhaul_setstate()
337 	} else if ((pr != NULL) && pr->flags.bm_control) {  in longhaul_setstate()
389 		return -EBUSY;  in longhaul_setstate()
416 		f_min = f_max - ROUNDING;  in guess_fsb()
432 	if (mult == -1) {  in longhaul_get_ranges()
434 		return -EINVAL;  in longhaul_get_ranges()
439 		return -EINVAL;  in longhaul_get_ranges()
441 	/* Get max multiplier - as we always did.  in longhaul_get_ranges()
454 		minmult = 30;  in longhaul_get_ranges()
469 		return -EINVAL;  in longhaul_get_ranges()
474 		return -EINVAL;  in longhaul_get_ranges()
480 		return -ENOMEM;  in longhaul_get_ranges()
484 		if (ratio == -1)  in longhaul_get_ranges()
494 		return -ENODEV;  in longhaul_get_ranges()
497 	for (j = 0; j < k - 1; j++) {  in longhaul_get_ranges()
557 	if (minvid.mV == 0 || maxvid.mV == 0 || minvid.mV > maxvid.mV) {  in longhaul_setup_voltagescaling()
558 		pr_info("Bogus values Min:%d.%03d Max:%d.%03d - Voltage scaling disabled\n",  in longhaul_setup_voltagescaling()
559 			minvid.mV/1000, minvid.mV%1000,  in longhaul_setup_voltagescaling()
560 			maxvid.mV/1000, maxvid.mV%1000);  in longhaul_setup_voltagescaling()
564 	if (minvid.mV == maxvid.mV) {  in longhaul_setup_voltagescaling()
565 …pr_info("Claims to support voltage scaling but min & max are both %d.%03d - Voltage scaling disabl…  in longhaul_setup_voltagescaling()
566 			maxvid.mV/1000, maxvid.mV%1000);  in longhaul_setup_voltagescaling()
571 	numvscales = maxvid.pos - minvid.pos + 1;  in longhaul_setup_voltagescaling()
573 		maxvid.mV/1000, maxvid.mV%1000,  in longhaul_setup_voltagescaling()
574 		minvid.mV/1000, minvid.mV%1000,  in longhaul_setup_voltagescaling()
582 	if (min_vid_speed == -1)  in longhaul_setup_voltagescaling()
600 	kHz_step = (highest_speed - min_vid_speed) / numvscales;  in longhaul_setup_voltagescaling()
603 		speed = freq_pos->frequency;  in longhaul_setup_voltagescaling()
605 			pos = (speed - min_vid_speed) / kHz_step + minvid.pos;  in longhaul_setup_voltagescaling()
608 		freq_pos->driver_data |= mV_vrm_table[pos] << 8;  in longhaul_setup_voltagescaling()
610 		pr_info("f: %d kHz, index: %d, vid: %d mV\n",  in longhaul_setup_voltagescaling()
611 			speed, j, vid.mV);  in longhaul_setup_voltagescaling()
650 				i--;  in longhaul_target()
701 		/* Find CN400 V-Link host bridge */  in enable_arbiter_disable()
767 	switch (c->x86_model) {  in longhaul_cpu_init()
777 		switch (c->x86_stepping) {  in longhaul_cpu_init()
789 			if (c->x86_stepping < 8) {  in longhaul_cpu_init()
804 		cpuname = "C3 'Ezra-T' [C5M]";  in longhaul_cpu_init()
816 		switch (c->x86_stepping) {  in longhaul_cpu_init()
865 		cx = &pr->power.states[ACPI_STATE_C3];  in longhaul_cpu_init()
866 		if (cx->address > 0 && cx->latency <= 1000)  in longhaul_cpu_init()
879 	    && ((pr == NULL) || !(pr->flags.bm_control))) {  in longhaul_cpu_init()
881 		return -ENODEV;  in longhaul_cpu_init()
896 	policy->transition_delay_us = 200000;	/* usec */  in longhaul_cpu_init()
897 	policy->freq_table = longhaul_table;  in longhaul_cpu_init()
922 		return -ENODEV;  in longhaul_init()
925 		pr_err("Option \"enable\" not set - Aborting\n");  in longhaul_init()
926 		return -ENODEV;  in longhaul_init()
931 		return -ENODEV;  in longhaul_init()
937 		return -ENODEV;  in longhaul_init()
940 	switch (c->x86_model) {  in longhaul_init()
944 		pr_err("Use acpi-cpufreq driver for VIA C7\n");  in longhaul_init()
947 	return -ENODEV;  in longhaul_init()
960 			freqs.old = policy->cur;  in longhaul_exit()