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Commit b8cec3c2 authored by Sergei Shtylyov's avatar Sergei Shtylyov Committed by Jeff Garzik
Browse files

pata_cmd64x: implement sff_irq_check() method 



Implement sff_irq_check() method for both old and new chips.

Signed-off-by: default avatarSergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: default avatarJeff Garzik <jgarzik@redhat.com>
parent 419fd246

drivers/ata/pata_cmd64x.c

+42 −1
Original line number Diff line number Diff line
@@ -33,7 +33,7 @@ 
#include <linux/libata.h>



#define DRV_NAME "pata_cmd64x"

#define DRV_VERSION "0.2.17"

#define DRV_VERSION "0.2.18"



/*

 * CMD64x specific registers definition.
@@ -229,6 +229,26 @@ static void cmd64x_set_dmamode(struct ata_port *ap, struct ata_device *adev) 
	pci_write_config_byte(pdev, pciD, regD);

}



/**

 *	cmd64x_sff_irq_check	-	check IDE interrupt

 *	@ap: ATA interface

 *

 *	Check IDE interrupt in CFR/ARTTIM23 registers.

 */



static bool cmd64x_sff_irq_check(struct ata_port *ap)

{

	struct pci_dev *pdev = to_pci_dev(ap->host->dev);

	int irq_mask = ap->port_no ? ARTTIM23_INTR_CH1 : CFR_INTR_CH0;

	int irq_reg  = ap->port_no ? ARTTIM23 : CFR;

	u8 irq_stat;



	/* NOTE: reading the register should clear the interrupt */

	pci_read_config_byte(pdev, irq_reg, &irq_stat);



	return irq_stat & irq_mask;

}



/**

 *	cmd64x_sff_irq_clear	-	clear IDE interrupt

 *	@ap: ATA interface
@@ -248,6 +268,23 @@ static void cmd64x_sff_irq_clear(struct ata_port *ap) 
	pci_read_config_byte(pdev, irq_reg, &irq_stat);

}



/**

 *	cmd648_sff_irq_check	-	check IDE interrupt

 *	@ap: ATA interface

 *

 *	Check IDE interrupt in MRDMODE register.

 */



static bool cmd648_sff_irq_check(struct ata_port *ap)

{

	struct pci_dev *pdev = to_pci_dev(ap->host->dev);

	unsigned long base = pci_resource_start(pdev, 4);

	int irq_mask = ap->port_no ? MRDMODE_INTR_CH1 : MRDMODE_INTR_CH0;

	u8 mrdmode = inb(base + 1);



	return mrdmode & irq_mask;

}



/**

 *	cmd648_sff_irq_clear	-	clear IDE interrupt

 *	@ap: ATA interface
@@ -294,12 +331,14 @@ static const struct ata_port_operations cmd64x_base_ops = { 


static struct ata_port_operations cmd64x_port_ops = {

	.inherits	= &cmd64x_base_ops,

	.sff_irq_check	= cmd64x_sff_irq_check,

	.sff_irq_clear	= cmd64x_sff_irq_clear,

	.cable_detect	= ata_cable_40wire,

};



static struct ata_port_operations cmd646r1_port_ops = {

	.inherits	= &cmd64x_base_ops,

	.sff_irq_check	= cmd64x_sff_irq_check,

	.sff_irq_clear	= cmd64x_sff_irq_clear,

	.bmdma_stop	= cmd646r1_bmdma_stop,

	.cable_detect	= ata_cable_40wire,
@@ -307,12 +346,14 @@ static struct ata_port_operations cmd646r1_port_ops = { 


static struct ata_port_operations cmd646r3_port_ops = {

	.inherits	= &cmd64x_base_ops,

	.sff_irq_check	= cmd648_sff_irq_check,

	.sff_irq_clear	= cmd648_sff_irq_clear,

	.cable_detect	= ata_cable_40wire,

};



static struct ata_port_operations cmd648_port_ops = {

	.inherits	= &cmd64x_base_ops,

	.sff_irq_check	= cmd648_sff_irq_check,

	.sff_irq_clear	= cmd648_sff_irq_clear,

	.cable_detect	= cmd648_cable_detect,

};