1// SPDX-License-Identifier: GPL-2.0
 2/*
 3 * PIO blacklist.  Some drives incorrectly report their maximal PIO mode,
 4 * at least in respect to CMD640.  Here we keep info on some known drives.
 5 *
 6 * Changes to the ide_pio_blacklist[] should be made with EXTREME CAUTION
 7 * to avoid breaking the fragile cmd640.c support.
 8 */
 9
10#include <linux/string.h>
11#include <linux/ide.h>
12
13static struct ide_pio_info {
14	const char	*name;
15	int		pio;
16} ide_pio_blacklist [] = {
17	{ "Conner Peripherals 540MB - CFS540A", 3 },
18
19	{ "WDC AC2700",  3 },
20	{ "WDC AC2540",  3 },
21	{ "WDC AC2420",  3 },
22	{ "WDC AC2340",  3 },
23	{ "WDC AC2250",  0 },
24	{ "WDC AC2200",  0 },
25	{ "WDC AC21200", 4 },
26	{ "WDC AC2120",  0 },
27	{ "WDC AC2850",  3 },
28	{ "WDC AC1270",  3 },
29	{ "WDC AC1170",  1 },
30	{ "WDC AC1210",  1 },
31	{ "WDC AC280",   0 },
32	{ "WDC AC31000", 3 },
33	{ "WDC AC31200", 3 },
34
35	{ "Maxtor 7131 AT", 1 },
36	{ "Maxtor 7171 AT", 1 },
37	{ "Maxtor 7213 AT", 1 },
38	{ "Maxtor 7245 AT", 1 },
39	{ "Maxtor 7345 AT", 1 },
40	{ "Maxtor 7546 AT", 3 },
41	{ "Maxtor 7540 AV", 3 },
42
43	{ "SAMSUNG SHD-3121A", 1 },
44	{ "SAMSUNG SHD-3122A", 1 },
45	{ "SAMSUNG SHD-3172A", 1 },
46
47	{ "ST5660A",  3 },
48	{ "ST3660A",  3 },
49	{ "ST3630A",  3 },
50	{ "ST3655A",  3 },
51	{ "ST3391A",  3 },
52	{ "ST3390A",  1 },
53	{ "ST3600A",  1 },
54	{ "ST3290A",  0 },
55	{ "ST3144A",  0 },
56	{ "ST3491A",  1 }, /* reports 3, should be 1 or 2 (depending on drive)
57			      according to Seagate's FIND-ATA program */
58
59	{ "QUANTUM ELS127A", 0 },
60	{ "QUANTUM ELS170A", 0 },
61	{ "QUANTUM LPS240A", 0 },
62	{ "QUANTUM LPS210A", 3 },
63	{ "QUANTUM LPS270A", 3 },
64	{ "QUANTUM LPS365A", 3 },
65	{ "QUANTUM LPS540A", 3 },
66	{ "QUANTUM LIGHTNING 540A", 3 },
67	{ "QUANTUM LIGHTNING 730A", 3 },
68
69	{ "QUANTUM FIREBALL_540", 3 }, /* Older Quantum Fireballs don't work */
70	{ "QUANTUM FIREBALL_640", 3 },
71	{ "QUANTUM FIREBALL_1080", 3 },
72	{ "QUANTUM FIREBALL_1280", 3 },
73	{ NULL, 0 }
74};
75
76/**
77 *	ide_scan_pio_blacklist 	-	check for a blacklisted drive
78 *	@model: Drive model string
79 *
80 *	This routine searches the ide_pio_blacklist for an entry
81 *	matching the start/whole of the supplied model name.
82 *
83 *	Returns -1 if no match found.
84 *	Otherwise returns the recommended PIO mode from ide_pio_blacklist[].
85 */
86
87int ide_scan_pio_blacklist(char *model)
88{
89	struct ide_pio_info *p;
90
91	for (p = ide_pio_blacklist; p->name != NULL; p++) {
92		if (strncmp(p->name, model, strlen(p->name)) == 0)
93			return p->pio;
94	}
95	return -1;
96}