linux-kernel - [PATCH] pata_cmd64x: suspend/resume

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Message-ID: <20061122165907.5a424362@localhost.localdomain>
Date:	Wed, 22 Nov 2006 16:59:07 +0000
From:	Alan <alan@...rguk.ukuu.org.uk>
To:	jgarzik@...ox.com, linux-kernel@...r.kernel.org, akpm@...l.org
Subject: [PATCH] pata_cmd64x: suspend/resume

On a resume of the CMD64x we must restore MRDMODE and latency if the BIOS
didn't get them right originally.

Signed-off-by: Alan Cox <alan@...hat.com>

diff -u --new-file --recursive --exclude-from /usr/src/exclude linux.vanilla-2.6.19-rc5-mm2/drivers/ata/pata_cmd64x.c linux-2.6.19-rc5-mm2/drivers/ata/pata_cmd64x.c
--- linux.vanilla-2.6.19-rc5-mm2/drivers/ata/pata_cmd64x.c	2006-11-15 13:25:59.000000000 +0000
+++ linux-2.6.19-rc5-mm2/drivers/ata/pata_cmd64x.c	2006-11-22 15:47:25.680962200 +0000
@@ -31,7 +31,7 @@
 #include <linux/libata.h>
 
 #define DRV_NAME "pata_cmd64x"
-#define DRV_VERSION "0.2.1"
+#define DRV_VERSION "0.2.2"
 
 /*
  * CMD64x specific registers definition.
@@ -276,6 +276,8 @@
 	.dma_boundary		= ATA_DMA_BOUNDARY,
 	.slave_configure	= ata_scsi_slave_config,
 	.bios_param		= ata_std_bios_param,
+	.resume			= ata_scsi_device_resume,
+	.suspend		= ata_scsi_device_suspend,
 };
 
 static struct ata_port_operations cmd64x_port_ops = {
@@ -468,6 +470,20 @@
 	return ata_pci_init_one(pdev, port_info, 2);
 }
 
+static int cmd64x_reinit_one(struct pci_dev *pdev)
+{
+	u8 mrdmode;
+	pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 64);
+	pci_read_config_byte(pdev, MRDMODE, &mrdmode);
+	mrdmode &= ~ 0x30;	/* IRQ set up */
+	mrdmode |= 0x02;	/* Memory read line enable */
+	pci_write_config_byte(pdev, MRDMODE, mrdmode);
+#ifdef CONFIG_PPC
+	pci_write_config_byte(pdev, UDIDETCR0, 0xF0);
+#endif
+	return ata_pci_device_resume(pdev);
+}
+
 static const struct pci_device_id cmd64x[] = {
 	{ PCI_VDEVICE(CMD, PCI_DEVICE_ID_CMD_643), 0 },
 	{ PCI_VDEVICE(CMD, PCI_DEVICE_ID_CMD_646), 1 },
@@ -481,7 +497,9 @@
 	.name 		= DRV_NAME,
 	.id_table	= cmd64x,
 	.probe 		= cmd64x_init_one,
-	.remove		= ata_pci_remove_one
+	.remove		= ata_pci_remove_one,
+	.suspend	= ata_pci_device_suspend,
+	.resume		= cmd64x_reinit_one,
 };
 
 static int __init cmd64x_init(void)
-
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