Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-29 07:31:29 +00:00
Code Issues Packages Projects Releases Wiki Activity

ata: ahci-dwc: Add platform-specific quirks support

Browse Source 
Some DWC AHCI SATA IP-core derivatives require to perform small platform
or IP-core specific setups. They are too small to be placed in a dedicated
driver. It's just much easier to have a set of quirks for them right in
the DWC AHCI driver code. Since we are about to add such platform support,
as a pre-requisite we introduce a platform-data based DWC AHCI quirks API.
The platform data can be used to define the flags passed to the
ahci_platform_get_resources() method, additional AHCI host-flags and a set
of callbacks to initialize, re-initialize and clear the platform settings.

Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru>
Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
This commit is contained in:
Serge Semin 2022-09-09 22:36:19 +03:00 committed by Damien Le Moal
parent 064f14e9df
commit bc7af9100f
1 changed files with 48 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

52
drivers/ata/ahci_dwc.c
View File

@ -90,7 +90,16 @@
#define AHCI_DWC_PORT_PHYCR 0x74
#define AHCI_DWC_PORT_PHYSR 0x78
struct ahci_dwc_plat_data {
unsigned int pflags;
unsigned int hflags;
int (*init)(struct ahci_host_priv *hpriv);
int (*reinit)(struct ahci_host_priv *hpriv);
void (*clear)(struct ahci_host_priv *hpriv);
};
struct ahci_dwc_host_priv {
const struct ahci_dwc_plat_data *pdata;
struct platform_device *pdev;
u32 timv;
@ -107,11 +116,15 @@ static struct ahci_host_priv *ahci_dwc_get_resources(struct platform_device *pde
return ERR_PTR(-ENOMEM);
dpriv->pdev = pdev;
dpriv->pdata = device_get_match_data(&pdev->dev);
if (!dpriv->pdata)
return ERR_PTR(-EINVAL);
hpriv = ahci_platform_get_resources(pdev, AHCI_PLATFORM_GET_RESETS);
hpriv = ahci_platform_get_resources(pdev, dpriv->pdata->pflags);
if (IS_ERR(hpriv))
return hpriv;
hpriv->flags |= dpriv->pdata->hflags;
hpriv->plat_data = (void *)dpriv;
return hpriv;
@ -242,22 +255,33 @@ static int ahci_dwc_init_dmacr(struct ahci_host_priv *hpriv)
static int ahci_dwc_init_host(struct ahci_host_priv *hpriv)
{
struct ahci_dwc_host_priv *dpriv = hpriv->plat_data;
int rc;
rc = ahci_platform_enable_resources(hpriv);
if (rc)
return rc;
if (dpriv->pdata->init) {
rc = dpriv->pdata->init(hpriv);
if (rc)
goto err_disable_resources;
}
ahci_dwc_check_cap(hpriv);
ahci_dwc_init_timer(hpriv);
rc = ahci_dwc_init_dmacr(hpriv);
if (rc)
goto err_disable_resources;
goto err_clear_platform;
return 0;
err_clear_platform:
if (dpriv->pdata->clear)
dpriv->pdata->clear(hpriv);
err_disable_resources:
ahci_platform_disable_resources(hpriv);
@ -275,6 +299,12 @@ static int ahci_dwc_reinit_host(struct ahci_host_priv *hpriv)
if (rc)
return rc;
if (dpriv->pdata->reinit) {
rc = dpriv->pdata->reinit(hpriv);
if (rc)
goto err_disable_resources;
}
writel(dpriv->timv, hpriv->mmio + AHCI_DWC_HOST_TIMER1MS);
for_each_set_bit(i, &port_map, AHCI_MAX_PORTS) {
@ -283,10 +313,20 @@ static int ahci_dwc_reinit_host(struct ahci_host_priv *hpriv)
}
return 0;
err_disable_resources:
ahci_platform_disable_resources(hpriv);
return rc;
}
static void ahci_dwc_clear_host(struct ahci_host_priv *hpriv)
{
struct ahci_dwc_host_priv *dpriv = hpriv->plat_data;
if (dpriv->pdata->clear)
dpriv->pdata->clear(hpriv);
ahci_platform_disable_resources(hpriv);
}
@ -370,9 +410,13 @@ static int ahci_dwc_resume(struct device *dev)
static DEFINE_SIMPLE_DEV_PM_OPS(ahci_dwc_pm_ops, ahci_dwc_suspend,
ahci_dwc_resume);
static struct ahci_dwc_plat_data ahci_dwc_plat = {
.pflags = AHCI_PLATFORM_GET_RESETS,
};
static const struct of_device_id ahci_dwc_of_match[] = {
{ .compatible = "snps,dwc-ahci", },
{ .compatible = "snps,spear-ahci", },
{ .compatible = "snps,dwc-ahci", &ahci_dwc_plat },
{ .compatible = "snps,spear-ahci", &ahci_dwc_plat },
{},
};
MODULE_DEVICE_TABLE(of, ahci_dwc_of_match);