[PATCH] ide: fix HPT37x timing tables

Fix/remove bad/unused timing tables: HPT370/A 66 MHz tables weren't really
needed (the chips are not UltraATA/133 capable and shouldn't support 66 MHz
PCI) and had many modes over- and underclocked, HPT372 33 MHz table was in
fact for 66 MHz and 50 MHz table missed UltraDMA mode 6, HPT374 33 MHz table
was really for 50 MHz...  (Actually, HPT370/A 33 MHz tables also have issues.
e.g.  HPT370 has PIO modes 0/1 overlocked.)

There's also no need in the separate HPT374 tables because HPT372 timings
should be the same (and those tables has UltraDMA mode 6 which HPT374 supports
depending on HPT374_ALLOW_ATA133_6 #define)...

Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Cc: Bartlomiej Zolnierkiewicz <B.Zolnierkiewicz@elka.pw.edu.pl>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

drivers/ide/pci/hpt366.c

@@ -67,6 +67,10 @@
  * - add support for HPT302N and HPT371N clocking (the same as for HPT372N)
  * - HPT371/N are single channel chips, so avoid touching the primary channel
  *   which exists only virtually (there's no pins for it)
+ * - fix/remove bad/unused timing tables: HPT370/A  66 MHz tables weren't really
+ *   needed and had many modes over- and  underclocked,  HPT372 33 MHz table was
+ *   for 66 MHz and 50 MHz table missed UltraDMA mode 6, HPT374 33 MHz table was
+ *   really for 50 MHz; switch to using HPT372 tables for HPT374...
  *		<source@mvista.com>
  *
  */
@@ -264,26 +268,6 @@ static struct chipset_bus_clock_list_entry thirty_three_base_hpt370[] = {
 	{	0,		0x06514e57	}
 };
 
-static struct chipset_bus_clock_list_entry sixty_six_base_hpt370[] = {
-	{	XFER_UDMA_5,	0x14846231	},
-	{	XFER_UDMA_4,	0x14886231	},
-	{	XFER_UDMA_3,	0x148c6231	},
-	{	XFER_UDMA_2,	0x148c6231	},
-	{	XFER_UDMA_1,	0x14906231	},
-	{	XFER_UDMA_0,	0x14986231	},
-
-	{	XFER_MW_DMA_2,	0x26514e21	},
-	{	XFER_MW_DMA_1,	0x26514e33	},
-	{	XFER_MW_DMA_0,	0x26514e97	},
-
-	{	XFER_PIO_4,	0x06514e21	},
-	{	XFER_PIO_3,	0x06514e22	},
-	{	XFER_PIO_2,	0x06514e33	},
-	{	XFER_PIO_1,	0x06914e43	},
-	{	XFER_PIO_0,	0x06914e57	},
-	{	0,		0x06514e57	}
-};
-
 /* these are the current (4 sep 2001) timings from highpoint */
 static struct chipset_bus_clock_list_entry thirty_three_base_hpt370a[] = {
 	{	XFER_UDMA_5,	0x12446231	},
@@ -305,27 +289,6 @@ static struct chipset_bus_clock_list_entry thirty_three_base_hpt370a[] = {
 	{	0,		0x06814ea7	}
 };
 
-/* 2x 33MHz timings */
-static struct chipset_bus_clock_list_entry sixty_six_base_hpt370a[] = {
-	{	XFER_UDMA_5,	0x1488e673	},
-	{	XFER_UDMA_4,	0x1488e673	},
-	{	XFER_UDMA_3,	0x1498e673	},
-	{	XFER_UDMA_2,	0x1490e673	},
-	{	XFER_UDMA_1,	0x1498e677	},
-	{	XFER_UDMA_0,	0x14a0e73f	},
-
-	{	XFER_MW_DMA_2,	0x2480fa73	},
-	{	XFER_MW_DMA_1,	0x2480fa77	}, 
-	{	XFER_MW_DMA_0,	0x2480fb3f	},
-
-	{	XFER_PIO_4,	0x0c82be73	},
-	{	XFER_PIO_3,	0x0c82be95	},
-	{	XFER_PIO_2,	0x0c82beb7	},
-	{	XFER_PIO_1,	0x0d02bf37	},
-	{	XFER_PIO_0,	0x0d02bf5f	},
-	{	0,		0x0d02bf5f	}
-};
-
 static struct chipset_bus_clock_list_entry fifty_base_hpt370a[] = {
 	{	XFER_UDMA_5,	0x12848242	},
 	{	XFER_UDMA_4,	0x12ac8242	},
@@ -347,27 +310,28 @@ static struct chipset_bus_clock_list_entry fifty_base_hpt370a[] = {
 };
 
 static struct chipset_bus_clock_list_entry thirty_three_base_hpt372[] = {
-	{	XFER_UDMA_6,	0x1c81dc62	},
-	{	XFER_UDMA_5,	0x1c6ddc62	},
-	{	XFER_UDMA_4,	0x1c8ddc62	},
-	{	XFER_UDMA_3,	0x1c8edc62	},	/* checkme */
-	{	XFER_UDMA_2,	0x1c91dc62	},
-	{	XFER_UDMA_1,	0x1c9adc62	},	/* checkme */
-	{	XFER_UDMA_0,	0x1c82dc62	},	/* checkme */
-
-	{	XFER_MW_DMA_2,	0x2c829262	},
-	{	XFER_MW_DMA_1,	0x2c829266	},	/* checkme */
-	{	XFER_MW_DMA_0,	0x2c82922e	},	/* checkme */
+	{	XFER_UDMA_6,	0x12446231	},	/* 0x12646231 ?? */
+	{	XFER_UDMA_5,	0x12446231	},
+	{	XFER_UDMA_4,	0x12446231	},
+	{	XFER_UDMA_3,	0x126c6231	},
+	{	XFER_UDMA_2,	0x12486231	},
+	{	XFER_UDMA_1,	0x124c6233	},
+	{	XFER_UDMA_0,	0x12506297	},
 
-	{	XFER_PIO_4,	0x0c829c62	},
-	{	XFER_PIO_3,	0x0c829c84	},
-	{	XFER_PIO_2,	0x0c829ca6	},
-	{	XFER_PIO_1,	0x0d029d26	},
-	{	XFER_PIO_0,	0x0d029d5e	},
-	{	0,		0x0d029d5e	}
+	{	XFER_MW_DMA_2,	0x22406c31	},
+	{	XFER_MW_DMA_1,	0x22406c33	},
+	{	XFER_MW_DMA_0,	0x22406c97	},
+
+	{	XFER_PIO_4,	0x06414e31	},
+	{	XFER_PIO_3,	0x06414e42	},
+	{	XFER_PIO_2,	0x06414e53	},
+	{	XFER_PIO_1,	0x06814e93	},
+	{	XFER_PIO_0,	0x06814ea7	},
+	{	0,		0x06814ea7	}
 };
 
 static struct chipset_bus_clock_list_entry fifty_base_hpt372[] = {
+	{	XFER_UDMA_6,	0x12848242	},
 	{	XFER_UDMA_5,	0x12848242	},
 	{	XFER_UDMA_4,	0x12ac8242	},
 	{	XFER_UDMA_3,	0x128c8242	},
@@ -389,7 +353,7 @@ static struct chipset_bus_clock_list_entry fifty_base_hpt372[] = {
 
 static struct chipset_bus_clock_list_entry sixty_six_base_hpt372[] = {
 	{	XFER_UDMA_6,	0x1c869c62	},
-	{	XFER_UDMA_5,	0x1cae9c62	},
+	{	XFER_UDMA_5,	0x1cae9c62	},	/* 0x1c8a9c62 */
 	{	XFER_UDMA_4,	0x1c8a9c62	},
 	{	XFER_UDMA_3,	0x1c8e9c62	},
 	{	XFER_UDMA_2,	0x1c929c62	},
@@ -408,50 +372,6 @@ static struct chipset_bus_clock_list_entry sixty_six_base_hpt372[] = {
 	{	0,		0x0d029d26	}
 };
 
-static struct chipset_bus_clock_list_entry thirty_three_base_hpt374[] = {
-	{	XFER_UDMA_6,	0x12808242	},
-	{	XFER_UDMA_5,	0x12848242	},
-	{	XFER_UDMA_4,	0x12ac8242	},
-	{	XFER_UDMA_3,	0x128c8242	},
-	{	XFER_UDMA_2,	0x120c8242	},
-	{	XFER_UDMA_1,	0x12148254	},
-	{	XFER_UDMA_0,	0x121882ea	},
-
-	{	XFER_MW_DMA_2,	0x22808242	},
-	{	XFER_MW_DMA_1,	0x22808254	},
-	{	XFER_MW_DMA_0,	0x228082ea	},
-
-	{	XFER_PIO_4,	0x0a81f442	},
-	{	XFER_PIO_3,	0x0a81f443	},
-	{	XFER_PIO_2,	0x0a81f454	},
-	{	XFER_PIO_1,	0x0ac1f465	},
-	{	XFER_PIO_0,	0x0ac1f48a	},
-	{	0,		0x06814e93	}
-};
-
-/* FIXME: 50MHz timings for HPT374 */
-
-#if 0
-static struct chipset_bus_clock_list_entry sixty_six_base_hpt374[] = {
-	{	XFER_UDMA_6,	0x12406231	},	/* checkme */
-	{	XFER_UDMA_5,	0x12446231	},	/* 0x14846231 */
-	{	XFER_UDMA_4,	0x16814ea7	},	/* 0x14886231 */
-	{	XFER_UDMA_3,	0x16814ea7	},	/* 0x148c6231 */
-	{	XFER_UDMA_2,	0x16814ea7	},	/* 0x148c6231 */
-	{	XFER_UDMA_1,	0x16814ea7	},	/* 0x14906231 */
-	{	XFER_UDMA_0,	0x16814ea7	},	/* 0x14986231 */
-	{	XFER_MW_DMA_2,	0x16814ea7	},	/* 0x26514e21 */
-	{	XFER_MW_DMA_1,	0x16814ea7	},	/* 0x26514e97 */
-	{	XFER_MW_DMA_0,	0x16814ea7	},	/* 0x26514e97 */
-	{	XFER_PIO_4,	0x06814ea7	},	/* 0x06514e21 */
-	{	XFER_PIO_3,	0x06814ea7	},	/* 0x06514e22 */
-	{	XFER_PIO_2,	0x06814ea7	},	/* 0x06514e33 */
-	{	XFER_PIO_1,	0x06814ea7	},	/* 0x06914e43 */
-	{	XFER_PIO_0,	0x06814ea7	},	/* 0x06914e57 */
-	{	0,		0x06814ea7	}
-};
-#endif
-
 #define HPT366_DEBUG_DRIVE_INFO		0
 #define HPT374_ALLOW_ATA133_6		0
 #define HPT371_ALLOW_ATA133_6		0
@@ -1211,9 +1131,7 @@ static void __devinit hpt37x_clocking(ide_hwif_t *hwif)
 			pll = F_LOW_PCI_66;
 	
 		if (pll == F_LOW_PCI_33) {
-			if (info->revision >= 8)
-				info->speed = thirty_three_base_hpt374;
-			else if (info->revision >= 5)
+			if (info->revision >= 5)
 				info->speed = thirty_three_base_hpt372;
 			else if (info->revision >= 4)
 				info->speed = thirty_three_base_hpt370a;
@@ -1223,26 +1141,17 @@ static void __devinit hpt37x_clocking(ide_hwif_t *hwif)
 		} else if (pll == F_LOW_PCI_40) {
 			/* Unsupported */
 		} else if (pll == F_LOW_PCI_50) {
-			if (info->revision >= 8)
-				info->speed = fifty_base_hpt370a;
-			else if (info->revision >= 5)
+			if (info->revision >= 5)
 				info->speed = fifty_base_hpt372;
-			else if (info->revision >= 4)
-				info->speed = fifty_base_hpt370a;
 			else
 				info->speed = fifty_base_hpt370a;
 			printk(KERN_DEBUG "HPT37X: using 50MHz PCI clock\n");
 		} else {
-			if (info->revision >= 8) {
-				printk(KERN_ERR "HPT37x: 66MHz timings are not supported.\n");
-			}
-			else if (info->revision >= 5)
+			if (info->revision >= 5) {
 				info->speed = sixty_six_base_hpt372;
-			else if (info->revision >= 4)
-				info->speed = sixty_six_base_hpt370a;
-			else
-				info->speed = sixty_six_base_hpt370;
-			printk(KERN_DEBUG "HPT37X: using 66MHz PCI clock\n");
+				printk(KERN_DEBUG "HPT37X: using 66MHz PCI clock\n");
+			} else
+				printk(KERN_ERR "HPT37x: 66MHz timings not supported.\n");
 		}
 	}