1 files changed, 96 insertions, 0 deletions
diff --git a/drivers/ide/ide-pio-blacklist.c b/drivers/ide/ide-pio-blacklist.c
new file mode 100644
index 000000000..1fd24798e
--- /dev/null
+++ b/drivers/ide/ide-pio-blacklist.c
@@ -0,0 +1,96 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * PIO blacklist.  Some drives incorrectly report their maximal PIO mode,
+ * at least in respect to CMD640.  Here we keep info on some known drives.
+ *
+ * Changes to the ide_pio_blacklist[] should be made with EXTREME CAUTION
+ * to avoid breaking the fragile cmd640.c support.
+ */
+
+#include <linux/string.h>
+#include <linux/ide.h>
+
+static struct ide_pio_info {
+	const char	*name;
+	int		pio;
+} ide_pio_blacklist [] = {
+	{ "Conner Peripherals 540MB - CFS540A", 3 },
+
+	{ "WDC AC2700",  3 },
+	{ "WDC AC2540",  3 },
+	{ "WDC AC2420",  3 },
+	{ "WDC AC2340",  3 },
+	{ "WDC AC2250",  0 },
+	{ "WDC AC2200",  0 },
+	{ "WDC AC21200", 4 },
+	{ "WDC AC2120",  0 },
+	{ "WDC AC2850",  3 },
+	{ "WDC AC1270",  3 },
+	{ "WDC AC1170",  1 },
+	{ "WDC AC1210",  1 },
+	{ "WDC AC280",   0 },
+	{ "WDC AC31000", 3 },
+	{ "WDC AC31200", 3 },
+
+	{ "Maxtor 7131 AT", 1 },
+	{ "Maxtor 7171 AT", 1 },
+	{ "Maxtor 7213 AT", 1 },
+	{ "Maxtor 7245 AT", 1 },
+	{ "Maxtor 7345 AT", 1 },
+	{ "Maxtor 7546 AT", 3 },
+	{ "Maxtor 7540 AV", 3 },
+
+	{ "SAMSUNG SHD-3121A", 1 },
+	{ "SAMSUNG SHD-3122A", 1 },
+	{ "SAMSUNG SHD-3172A", 1 },
+
+	{ "ST5660A",  3 },
+	{ "ST3660A",  3 },
+	{ "ST3630A",  3 },
+	{ "ST3655A",  3 },
+	{ "ST3391A",  3 },
+	{ "ST3390A",  1 },
+	{ "ST3600A",  1 },
+	{ "ST3290A",  0 },
+	{ "ST3144A",  0 },
+	{ "ST3491A",  1 }, /* reports 3, should be 1 or 2 (depending on drive)
+			      according to Seagate's FIND-ATA program */
+
+	{ "QUANTUM ELS127A", 0 },
+	{ "QUANTUM ELS170A", 0 },
+	{ "QUANTUM LPS240A", 0 },
+	{ "QUANTUM LPS210A", 3 },
+	{ "QUANTUM LPS270A", 3 },
+	{ "QUANTUM LPS365A", 3 },
+	{ "QUANTUM LPS540A", 3 },
+	{ "QUANTUM LIGHTNING 540A", 3 },
+	{ "QUANTUM LIGHTNING 730A", 3 },
+
+	{ "QUANTUM FIREBALL_540", 3 }, /* Older Quantum Fireballs don't work */
+	{ "QUANTUM FIREBALL_640", 3 },
+	{ "QUANTUM FIREBALL_1080", 3 },
+	{ "QUANTUM FIREBALL_1280", 3 },
+	{ NULL, 0 }
+};
+
+/**
+ *	ide_scan_pio_blacklist 	-	check for a blacklisted drive
+ *	@model: Drive model string
+ *
+ *	This routine searches the ide_pio_blacklist for an entry
+ *	matching the start/whole of the supplied model name.
+ *
+ *	Returns -1 if no match found.
+ *	Otherwise returns the recommended PIO mode from ide_pio_blacklist[].
+ */
+
+int ide_scan_pio_blacklist(char *model)
+{
+	struct ide_pio_info *p;
+
+	for (p = ide_pio_blacklist; p->name != NULL; p++) {
+		if (strncmp(p->name, model, strlen(p->name)) == 0)
+			return p->pio;
+	}
+	return -1;
+}