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()
261 	if (mult == -1)  in longhaul_setstate()
262 		return -EINVAL;  in longhaul_setstate()
266 		return -EINVAL;  in longhaul_setstate()
288 	    || ((pr != NULL) && pr->flags.bm_control))) {  in longhaul_setstate()
293 			bm_timeout--;  in longhaul_setstate()
302 	} else if ((pr != NULL) && pr->flags.bm_control) {  in longhaul_setstate()
317 	 * Longhaul v2 appears in Samuel2 Steppings 1->7 [C5B] and Ezra [C5C]  in longhaul_setstate()
319 	 * Longhaul v3 (aka Powersaver). (Ezra-T [C5M] & Nehemiah [C5N])  in longhaul_setstate()
328 			do_powersaver(cx->address, mults_index, dir);  in longhaul_setstate()
338 	} else if ((pr != NULL) && pr->flags.bm_control) {  in longhaul_setstate()
390 		return -EBUSY;  in longhaul_setstate()
417 		f_min = f_max - ROUNDING;  in guess_fsb()
433 	if (mult == -1) {  in longhaul_get_ranges()
435 		return -EINVAL;  in longhaul_get_ranges()
440 		return -EINVAL;  in longhaul_get_ranges()
442 	/* Get max multiplier - as we always did.  in longhaul_get_ranges()
455 		minmult = 30;  in longhaul_get_ranges()
470 		return -EINVAL;  in longhaul_get_ranges()
475 		return -EINVAL;  in longhaul_get_ranges()
481 		return -ENOMEM;  in longhaul_get_ranges()
485 		if (ratio == -1)  in longhaul_get_ranges()
495 		return -ENODEV;  in longhaul_get_ranges()
498 	for (j = 0; j < k - 1; j++) {  in longhaul_get_ranges()
558 	if (minvid.mV == 0 || maxvid.mV == 0 || minvid.mV > maxvid.mV) {  in longhaul_setup_voltagescaling()
559 		pr_info("Bogus values Min:%d.%03d Max:%d.%03d - Voltage scaling disabled\n",  in longhaul_setup_voltagescaling()
560 			minvid.mV/1000, minvid.mV%1000,  in longhaul_setup_voltagescaling()
561 			maxvid.mV/1000, maxvid.mV%1000);  in longhaul_setup_voltagescaling()
565 	if (minvid.mV == maxvid.mV) {  in longhaul_setup_voltagescaling()
566 …pr_info("Claims to support voltage scaling but min & max are both %d.%03d - Voltage scaling disabl…  in longhaul_setup_voltagescaling()
567 			maxvid.mV/1000, maxvid.mV%1000);  in longhaul_setup_voltagescaling()
572 	numvscales = maxvid.pos - minvid.pos + 1;  in longhaul_setup_voltagescaling()
574 		maxvid.mV/1000, maxvid.mV%1000,  in longhaul_setup_voltagescaling()
575 		minvid.mV/1000, minvid.mV%1000,  in longhaul_setup_voltagescaling()
583 	if (min_vid_speed == -1)  in longhaul_setup_voltagescaling()
601 	kHz_step = (highest_speed - min_vid_speed) / numvscales;  in longhaul_setup_voltagescaling()
604 		speed = freq_pos->frequency;  in longhaul_setup_voltagescaling()
606 			pos = (speed - min_vid_speed) / kHz_step + minvid.pos;  in longhaul_setup_voltagescaling()
609 		freq_pos->driver_data |= mV_vrm_table[pos] << 8;  in longhaul_setup_voltagescaling()
611 		pr_info("f: %d kHz, index: %d, vid: %d mV\n",  in longhaul_setup_voltagescaling()
612 			speed, j, vid.mV);  in longhaul_setup_voltagescaling()
651 				i--;  in longhaul_target()
702 		/* Find CN400 V-Link host bridge */  in enable_arbiter_disable()
768 	switch (c->x86_model) {  in longhaul_cpu_init()
778 		switch (c->x86_stepping) {  in longhaul_cpu_init()
790 			if (c->x86_stepping < 8) {  in longhaul_cpu_init()
805 		cpuname = "C3 'Ezra-T' [C5M]";  in longhaul_cpu_init()
817 		switch (c->x86_stepping) {  in longhaul_cpu_init()
866 		cx = &pr->power.states[ACPI_STATE_C3];  in longhaul_cpu_init()
867 		if (cx->address > 0 && cx->latency <= 1000)  in longhaul_cpu_init()
880 	    && ((pr == NULL) || !(pr->flags.bm_control))) {  in longhaul_cpu_init()
882 		return -ENODEV;  in longhaul_cpu_init()
897 	policy->transition_delay_us = 200000;	/* usec */  in longhaul_cpu_init()
898 	policy->freq_table = longhaul_table;  in longhaul_cpu_init()
923 		return -ENODEV;  in longhaul_init()
926 		pr_err("Option \"enable\" not set - Aborting\n");  in longhaul_init()
927 		return -ENODEV;  in longhaul_init()
932 		return -ENODEV;  in longhaul_init()
938 		return -ENODEV;  in longhaul_init()
941 	switch (c->x86_model) {  in longhaul_init()
945 		pr_err("Use acpi-cpufreq driver for VIA C7\n");  in longhaul_init()
948 	return -ENODEV;  in longhaul_init()
961 			freqs.old = policy->cur;  in longhaul_exit()