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net: cpsw: Add a minimal cpsw-common module for shared code 

Looks like davinci_emac and cpsw can share some code although the
device registers have a different layout.

At least the code for getting the MAC address using syscon can
be shared by passing the register offset. Let's start with that
and set up a minimal shared cpsw-shared.c.

Cc: Brian Hutchinson <b.hutchman@gmail.com>
Cc: Felipe Balbi <balbi@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Tony Lindgren 2015-01-28 11:33:04 -08:00 committed by David S. Miller
parent 4c72c53be5
commit e5a49c1e3b
4 changed files with 60 additions and 33 deletions
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3
drivers/net/ethernet/ti/Makefile
View File

@ -2,6 +2,9 @@
# Makefile for the TI network device drivers.
#
obj-$(CONFIG_TI_CPSW) += cpsw-common.o
obj-$(CONFIG_TI_DAVINCI_EMAC) += cpsw-common.o
obj-$(CONFIG_TLAN) += tlan.o
obj-$(CONFIG_CPMAC) += cpmac.o
obj-$(CONFIG_TI_DAVINCI_EMAC) += davinci_emac.o

53
drivers/net/ethernet/ti/cpsw-common.c Normal file
View File

@ -0,0 +1,53 @@
/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/regmap.h>
#include <linux/mfd/syscon.h>
#define AM33XX_CTRL_MAC_LO_REG(offset, id) ((offset) + 0x8 * (id))
#define AM33XX_CTRL_MAC_HI_REG(offset, id) ((offset) + 0x8 * (id) + 0x4)
int cpsw_am33xx_cm_get_macid(struct device *dev, u16 offset, int slave,
u8 *mac_addr)
{
u32 macid_lo;
u32 macid_hi;
struct regmap *syscon;
syscon = syscon_regmap_lookup_by_phandle(dev->of_node, "syscon");
if (IS_ERR(syscon)) {
if (PTR_ERR(syscon) == -ENODEV)
return 0;
return PTR_ERR(syscon);
}
regmap_read(syscon, AM33XX_CTRL_MAC_LO_REG(offset, slave),
&macid_lo);
regmap_read(syscon, AM33XX_CTRL_MAC_HI_REG(offset, slave),
&macid_hi);
mac_addr[5] = (macid_lo >> 8) & 0xff;
mac_addr[4] = macid_lo & 0xff;
mac_addr[3] = (macid_hi >> 24) & 0xff;
mac_addr[2] = (macid_hi >> 16) & 0xff;
mac_addr[1] = (macid_hi >> 8) & 0xff;
mac_addr[0] = macid_hi & 0xff;
return 0;
}
EXPORT_SYMBOL_GPL(cpsw_am33xx_cm_get_macid);
MODULE_LICENSE("GPL");

35
drivers/net/ethernet/ti/cpsw.c
View File

@ -33,8 +33,6 @@
#include <linux/of_net.h>
#include <linux/of_device.h>
#include <linux/if_vlan.h>
#include <linux/mfd/syscon.h>
#include <linux/regmap.h>
#include <linux/pinctrl/consumer.h>
@ -1936,36 +1934,6 @@ static void cpsw_slave_init(struct cpsw_slave *slave, struct cpsw_priv *priv,
slave->port_vlan = data->dual_emac_res_vlan;
}
#define AM33XX_CTRL_MAC_LO_REG(id) (0x630 + 0x8 * id)
#define AM33XX_CTRL_MAC_HI_REG(id) (0x630 + 0x8 * id + 0x4)
static int cpsw_am33xx_cm_get_macid(struct device *dev, int slave,
u8 *mac_addr)
{
u32 macid_lo;
u32 macid_hi;
struct regmap *syscon;
syscon = syscon_regmap_lookup_by_phandle(dev->of_node, "syscon");
if (IS_ERR(syscon)) {
if (PTR_ERR(syscon) == -ENODEV)
return 0;
return PTR_ERR(syscon);
}
regmap_read(syscon, AM33XX_CTRL_MAC_LO_REG(slave), &macid_lo);
regmap_read(syscon, AM33XX_CTRL_MAC_HI_REG(slave), &macid_hi);
mac_addr[5] = (macid_lo >> 8) & 0xff;
mac_addr[4] = macid_lo & 0xff;
mac_addr[3] = (macid_hi >> 24) & 0xff;
mac_addr[2] = (macid_hi >> 16) & 0xff;
mac_addr[1] = (macid_hi >> 8) & 0xff;
mac_addr[0] = macid_hi & 0xff;
return 0;
}
static int cpsw_probe_dt(struct cpsw_platform_data *data,
struct platform_device *pdev)
{
@ -2090,7 +2058,8 @@ no_phy_slave:
memcpy(slave_data->mac_addr, mac_addr, ETH_ALEN);
} else {
if (of_machine_is_compatible("ti,am33xx")) {
ret = cpsw_am33xx_cm_get_macid(&pdev->dev, i,
ret = cpsw_am33xx_cm_get_macid(&pdev->dev,
0x630, i,
slave_data->mac_addr);
if (ret)
return ret;

2
drivers/net/ethernet/ti/cpsw.h
View File

@ -41,5 +41,7 @@ struct cpsw_platform_data {
};
void cpsw_phy_sel(struct device *dev, phy_interface_t phy_mode, int slave);
int cpsw_am33xx_cm_get_macid(struct device *dev, u16 offset, int slave,
u8 *mac_addr);
#endif /* __CPSW_H__ */