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Commit 08f12edc authored by Jeff Garzik's avatar Jeff Garzik
Browse files

[libata] ata_piix: attempt to fix ICH8 support 



Take into account the fact that ICH8 changed the register layout of
the MAP and PCS register bits.

Signed-off-by: default avatarJeff Garzik <jeff@garzik.org>
parent ea35d29e

drivers/scsi/ata_piix.c

+38 −4
Original line number Diff line number Diff line
@@ -126,6 +126,7 @@ enum { 
	ich6_sata		= 4,

	ich6_sata_ahci		= 5,

	ich6m_sata_ahci		= 6,

	ich8_sata_ahci		= 7,



	/* constants for mapping table */

	P0			= 0,  /* port 0 */
@@ -142,11 +143,13 @@ enum { 
struct piix_map_db {

	const u32 mask;

	const u32 port_enable;

	const int present_shift;

	const int map[][4];

};



struct piix_host_priv {

	const int *map;

	const struct piix_map_db *map_db;

};



static int piix_init_one (struct pci_dev *pdev,
@@ -192,11 +195,11 @@ static const struct pci_device_id piix_pci_tbl[] = { 
	/* Enterprise Southbridge 2 (where's the datasheet?) */

	{ 0x8086, 0x2680, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich6_sata_ahci },

	/* SATA Controller 1 IDE (ICH8, no datasheet yet) */

	{ 0x8086, 0x2820, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich6_sata_ahci },

	{ 0x8086, 0x2820, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_ahci },

	/* SATA Controller 2 IDE (ICH8, ditto) */

	{ 0x8086, 0x2825, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich6_sata_ahci },

	{ 0x8086, 0x2825, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_ahci },

	/* Mobile SATA Controller IDE (ICH8M, ditto) */

	{ 0x8086, 0x2828, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich6m_sata_ahci },

	{ 0x8086, 0x2828, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_ahci },



	{ }	/* terminate list */

};
@@ -296,6 +299,7 @@ static const struct ata_port_operations piix_sata_ops = { 
static const struct piix_map_db ich5_map_db = {

	.mask = 0x7,

	.port_enable = 0x3,

	.present_shift = 4,

	.map = {

		/* PM   PS   SM   SS       MAP  */

		{  P0,  NA,  P1,  NA }, /* 000b */
@@ -312,6 +316,7 @@ static const struct piix_map_db ich5_map_db = { 
static const struct piix_map_db ich6_map_db = {

	.mask = 0x3,

	.port_enable = 0xf,

	.present_shift = 4,

	.map = {

		/* PM   PS   SM   SS       MAP */

		{  P0,  P2,  P1,  P3 }, /* 00b */
@@ -324,6 +329,7 @@ static const struct piix_map_db ich6_map_db = { 
static const struct piix_map_db ich6m_map_db = {

	.mask = 0x3,

	.port_enable = 0x5,

	.present_shift = 4,

	.map = {

		/* PM   PS   SM   SS       MAP */

		{  P0,  P2,  RV,  RV }, /* 00b */
@@ -333,12 +339,26 @@ static const struct piix_map_db ich6m_map_db = { 
	},

};



static const struct piix_map_db ich8_map_db = {

	.mask = 0x3,

	.port_enable = 0x3,

	.present_shift = 8,

	.map = {

		/* PM   PS   SM   SS       MAP */

		{  P0,  RV,  P1,  RV }, /* 00b (hardwired) */

		{  RV,  RV,  RV,  RV },

		{  RV,  RV,  RV,  RV }, /* 10b (never) */

		{  RV,  RV,  RV,  RV },

	},

};



static const struct piix_map_db *piix_map_db_table[] = {

	[ich5_sata]		= &ich5_map_db,

	[esb_sata]		= &ich5_map_db,

	[ich6_sata]		= &ich6_map_db,

	[ich6_sata_ahci]	= &ich6_map_db,

	[ich6m_sata_ahci]	= &ich6m_map_db,

	[ich8_sata_ahci]	= &ich8_map_db,

};



static struct ata_port_info piix_port_info[] = {
@@ -426,6 +446,18 @@ static struct ata_port_info piix_port_info[] = { 
		.udma_mask	= 0x7f,	/* udma0-6 */

		.port_ops	= &piix_sata_ops,

	},



	/* ich8_sata_ahci */

	{

		.sht		= &piix_sht,

		.host_flags	= ATA_FLAG_SATA | PIIX_FLAG_COMBINED_ICH6 |

				  PIIX_FLAG_CHECKINTR | PIIX_FLAG_SCR |

				  PIIX_FLAG_AHCI,

		.pio_mask	= 0x1f,	/* pio0-4 */

		.mwdma_mask	= 0x07, /* mwdma0-2 */

		.udma_mask	= 0x7f,	/* udma0-6 */

		.port_ops	= &piix_sata_ops,

	},

};



static struct pci_bits piix_enable_bits[] = {
@@ -534,7 +566,8 @@ static int piix_sata_prereset(struct ata_port *ap) 
		port = map[base + i];

		if (port < 0)

			continue;

		if (ap->flags & PIIX_FLAG_IGNORE_PCS || pcs & 1 << (4 + port))

		if ((ap->flags & PIIX_FLAG_IGNORE_PCS) ||

		    (pcs & 1 << (hpriv->map_db->present_shift + port)))

			present = 1;

	}
@@ -817,6 +850,7 @@ static void __devinit piix_init_sata_map(struct pci_dev *pdev, 
			   "invalid MAP value %u\n", map_value);



	hpriv->map = map;

	hpriv->map_db = map_db;

}



/**