fm-eth: Add ability for board code to disable a port

The SoC configuration may have more ports enabled than a given board
actually can utilize.  Add a routinue that allows the board code to
disable a port that it knows isn't being used.

fm_disable_port() needs to be called before cpu_eth_init().

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

drivers/net/fm/fm.h

@@ -110,6 +110,7 @@ u32 fm_muram_base(int fm_idx);
 int fm_init_common(int index, struct ccsr_fman *reg);
 int fm_eth_initialize(struct ccsr_fman *reg, struct fm_eth_info *info);
 phy_interface_t fman_port_enet_if(enum fm_port port);
+void fman_disable_port(enum fm_port port);
 
 struct fsl_enet_mac {
 	void *base; /* MAC controller registers base address */

drivers/net/fm/init.c

@@ -123,6 +123,14 @@ void fman_enet_init(void)
 	return ;
 }
 
+void fm_disable_port(enum fm_port port)
+{
+	int i = fm_port_to_index(port);
+
+	fm_info[i].enabled = 0;
+	fman_disable_port(port);
+}
+
 void fm_info_set_mdio(enum fm_port port, struct mii_dev *bus)
 {
 	int i = fm_port_to_index(port);

drivers/net/fm/p1023.c

@@ -36,6 +36,12 @@ static int is_device_disabled(enum fm_port port)
 	return port_to_devdisr[port] & devdisr;
 }
 
+void fman_disable_port(enum fm_port port)
+{
+	ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
+	setbits_be32(&gur->devdisr, port_to_devdisr[port]);
+}
+
 phy_interface_t fman_port_enet_if(enum fm_port port)
 {
 	ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);

drivers/net/fm/p4080.c

@@ -44,6 +44,12 @@ static int is_device_disabled(enum fm_port port)
 	return port_to_devdisr[port] & devdisr2;
 }
 
+void fman_disable_port(enum fm_port port)
+{
+	ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
+	setbits_be32(&gur->devdisr2, port_to_devdisr[port]);
+}
+
 phy_interface_t fman_port_enet_if(enum fm_port port)
 {
 	ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);

drivers/net/fm/p5020.c

@@ -40,6 +40,12 @@ static int is_device_disabled(enum fm_port port)
 	return port_to_devdisr[port] & devdisr2;
 }
 
+void fman_disable_port(enum fm_port port)
+{
+	ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
+	setbits_be32(&gur->devdisr2, port_to_devdisr[port]);
+}
+
 phy_interface_t fman_port_enet_if(enum fm_port port)
 {
 	ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);

include/fm_eth.h

@@ -110,5 +110,6 @@ void fdt_fixup_fman_ethernet(void *fdt);
 phy_interface_t fm_info_get_enet_if(enum fm_port port);
 void fm_info_set_phy_address(enum fm_port port, int address);
 void fm_info_set_mdio(enum fm_port port, struct mii_dev *bus);
+void fm_disable_port(enum fm_port port);
 
 #endif