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ahci_platform: Provide for vendor specific init 

Some AHCI implementations may use Vendor Specific HBA[A0h, FFh]
and/or Port[70h, 7Fh] registers to 'prepare' for initialization.
For that, the platform needs memory mapped address of AHCI registers.

This patch adds the 'mmio' argument and reorders the call to
platform init function.

Signed-off-by: Jassi Brar <jassi.brar@samsung.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
This commit is contained in:
Jassi Brar 2010-06-25 18:21:19 +09:00 committed by Jeff Garzik
parent 9fe6206f40
commit 08354809d6
2 changed files with 18 additions and 11 deletions
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25
drivers/ata/ahci_platform.c
View File

@ -54,19 +54,13 @@ static int __init ahci_probe(struct platform_device *pdev)
return -EINVAL;
}
if (pdata && pdata->init) {
rc = pdata->init(dev);
if (rc)
return rc;
}
if (pdata && pdata->ata_port_info)
pi = *pdata->ata_port_info;
hpriv = devm_kzalloc(dev, sizeof(*hpriv), GFP_KERNEL);
if (!hpriv) {
rc = -ENOMEM;
goto err0;
dev_err(dev, "can't alloc ahci_host_priv\n");
return -ENOMEM;
}
hpriv->flags |= (unsigned long)pi.private_data;
@ -74,8 +68,19 @@ static int __init ahci_probe(struct platform_device *pdev)
hpriv->mmio = devm_ioremap(dev, mem->start, resource_size(mem));
if (!hpriv->mmio) {
dev_err(dev, "can't map %pR\n", mem);
rc = -ENOMEM;
goto err0;
return -ENOMEM;
}
/*
* Some platforms might need to prepare for mmio region access,
* which could be done in the following init call. So, the mmio
* region shouldn't be accessed before init (if provided) has
* returned successfully.
*/
if (pdata && pdata->init) {
rc = pdata->init(dev, hpriv->mmio);
if (rc)
return rc;
}
ahci_save_initial_config(dev, hpriv,

4
include/linux/ahci_platform.h
View File

@ -15,11 +15,13 @@
#ifndef _AHCI_PLATFORM_H
#define _AHCI_PLATFORM_H
#include <linux/compiler.h>
struct device;
struct ata_port_info;
struct ahci_platform_data {
int (*init)(struct device *dev);
int (*init)(struct device *dev, void __iomem *addr);
void (*exit)(struct device *dev);
const struct ata_port_info *ata_port_info;
unsigned int force_port_map;