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net: stmmac: Allocate and pass soc/board specific data to callbacks 

The current .init and .exit callbacks requires access to driver
private data structures. This is not a good seperation and abstraction.

Instead, we add a new .setup callback for allocating private data, and
pass the returned pointer to the other callbacks.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Chen-Yu Tsai 2014-01-17 21:24:42 +08:00 committed by David S. Miller
parent c5e4ddbdfa
commit 938dfdaa3c
3 changed files with 26 additions and 10 deletions
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12
Documentation/networking/stmmac.txt
View File

@ -127,8 +127,9 @@ struct plat_stmmacenet_data {
int riwt_off;
void (*fix_mac_speed)(void *priv, unsigned int speed);
void (*bus_setup)(void __iomem *ioaddr);
int (*init)(struct platform_device *pdev);
void (*exit)(struct platform_device *pdev);
void *(*setup)(struct platform_device *pdev);
int (*init)(struct platform_device *pdev, void *priv);
void (*exit)(struct platform_device *pdev, void *priv);
void *custom_cfg;
void *custom_data;
void *bsp_priv;
@ -169,10 +170,13 @@ Where:
o bus_setup: perform HW setup of the bus. For example, on some ST platforms
this field is used to configure the AMBA bridge to generate more
efficient STBus traffic.
o init/exit: callbacks used for calling a custom initialization;
o setup/init/exit: callbacks used for calling a custom initialization;
this is sometime necessary on some platforms (e.g. ST boxes)
where the HW needs to have set some PIO lines or system cfg
registers.
registers. setup should return a pointer to private data,
which will be stored in bsp_priv, and then passed to init and
exit callbacks. init/exit callbacks should not use or modify
platform data.
o custom_cfg/custom_data: this is a custom configuration that can be passed
while initializing the resources.
o bsp_priv: another private pointer.

18
drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
View File

@ -144,9 +144,16 @@ static int stmmac_pltfr_probe(struct platform_device *pdev)
}
}
/* Custom setup (if needed) */
if (plat_dat->setup) {
plat_dat->bsp_priv = plat_dat->setup(pdev);
if (IS_ERR(plat_dat->bsp_priv))
return PTR_ERR(plat_dat->bsp_priv);
}
/* Custom initialisation (if needed)*/
if (plat_dat->init) {
ret = plat_dat->init(pdev);
ret = plat_dat->init(pdev, plat_dat->bsp_priv);
if (unlikely(ret))
return ret;
}
@ -203,7 +210,10 @@ static int stmmac_pltfr_remove(struct platform_device *pdev)
int ret = stmmac_dvr_remove(ndev);
if (priv->plat->exit)
priv->plat->exit(pdev);
priv->plat->exit(pdev, priv->plat->bsp_priv);
if (priv->plat->free)
priv->plat->free(pdev, priv->plat->bsp_priv);
return ret;
}
@ -218,7 +228,7 @@ static int stmmac_pltfr_suspend(struct device *dev)
ret = stmmac_suspend(ndev);
if (priv->plat->exit)
priv->plat->exit(pdev);
priv->plat->exit(pdev, priv->plat->bsp_priv);
return ret;
}
@ -230,7 +240,7 @@ static int stmmac_pltfr_resume(struct device *dev)
struct platform_device *pdev = to_platform_device(dev);
if (priv->plat->init)
priv->plat->init(pdev);
priv->plat->init(pdev, priv->plat->bsp_priv);
return stmmac_resume(ndev);
}

6
include/linux/stmmac.h
View File

@ -113,8 +113,10 @@ struct plat_stmmacenet_data {
int max_speed;
void (*fix_mac_speed)(void *priv, unsigned int speed);
void (*bus_setup)(void __iomem *ioaddr);
int (*init)(struct platform_device *pdev);
void (*exit)(struct platform_device *pdev);
void *(*setup)(struct platform_device *pdev);
void (*free)(struct platform_device *pdev, void *priv);
int (*init)(struct platform_device *pdev, void *priv);
void (*exit)(struct platform_device *pdev, void *priv);
void *custom_cfg;
void *custom_data;
void *bsp_priv;