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authorChen-Yu Tsai <wens@csie.org>2014-01-17 21:24:42 +0800
committerDavid S. Miller <davem@davemloft.net>2014-01-19 20:02:02 -0800
commit938dfdaa3c0f92e9a490d324f3bce43bbaef7632 (patch)
treeda3396dd24faaa4898790d3e995bfb7ecb5ea0fb
parentc5e4ddbdfa1134a36589c1466ed4abb85fe6f976 (diff)
downloadlinux-938dfdaa3c0f92e9a490d324f3bce43bbaef7632.tar.bz2
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>
-rw-r--r--Documentation/networking/stmmac.txt12
-rw-r--r--drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c18
-rw-r--r--include/linux/stmmac.h6
3 files changed, 26 insertions, 10 deletions
diff --git a/Documentation/networking/stmmac.txt b/Documentation/networking/stmmac.txt
index cdd916da838d..2090895b08d4 100644
--- a/Documentation/networking/stmmac.txt
+++ b/Documentation/networking/stmmac.txt
@@ -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.
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
index cc6b89a75f99..704a5e0069c0 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
@@ -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);
}
diff --git a/include/linux/stmmac.h b/include/linux/stmmac.h
index 33ace712e7e8..0a5a7aca562e 100644
--- a/include/linux/stmmac.h
+++ b/include/linux/stmmac.h
@@ -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;