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
13 static 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
ide_scan_pio_blacklist(char * model)87 int 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 }
97