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authorAndrey Smirnov <andrew.smirnov@gmail.com>2017-01-10 07:08:56 -0800
committerSascha Hauer <s.hauer@pengutronix.de>2017-01-12 07:40:00 +0100
commit75b6972be4ec9c7edb7e4a42fc3d3fa6778cb5d1 (patch)
treea57baa29fcda8b7d2e543bddd27b10df767f02d6 /arch
parentf36c383bcc053da35edcbc3ca1dfffe78993e3e0 (diff)
downloadbarebox-75b6972be4ec9c7edb7e4a42fc3d3fa6778cb5d1.tar.gz
i.MX: ocotp: Add provisions for storing multiple MAC addresses
i.MX SoC variants like Vybrid have more than one built-in Ethernet interface and as a consequence support storing more than one MAC address in OCOTP module. Add code to create multiple 'mac_addr<n>' parameters as well as 'mac_addr' as an "alias" to 'mac_addr0' for backwards compatibility. Acked-by: Stefan Lengfeld <s.lengfeld@phytec.de> Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/mach-imx/ocotp.c70
1 files changed, 51 insertions, 19 deletions
diff --git a/arch/arm/mach-imx/ocotp.c b/arch/arm/mach-imx/ocotp.c
index 7f625d8..bd5448d 100644
--- a/arch/arm/mach-imx/ocotp.c
+++ b/arch/arm/mach-imx/ocotp.c
@@ -69,12 +69,22 @@
/* Other definitions */
#define IMX6_OTP_DATA_ERROR_VAL 0xBADABADA
#define DEF_RELAX 20
-#define MAC_OFFSET (0x22 * 4)
+#define MAC_OFFSET_0 (0x22 * 4)
+#define MAC_OFFSET_1 (0x24 * 4)
+#define MAX_MAC_OFFSETS 2
#define MAC_BYTES 8
struct imx_ocotp_data {
int num_regs;
u32 (*addr_to_offset)(u32 addr);
+ u8 mac_offsets[MAX_MAC_OFFSETS];
+ u8 mac_offsets_num;
+};
+
+struct ocotp_priv_ethaddr {
+ char value[MAC_BYTES];
+ struct regmap *map;
+ u8 offset;
};
struct ocotp_priv {
@@ -84,9 +94,10 @@ struct ocotp_priv {
struct device_d dev;
int permanent_write_enable;
int sense_enable;
- char ethaddr[6];
+ struct ocotp_priv_ethaddr ethaddr[MAX_MAC_OFFSETS];
struct regmap_config map_config;
const struct imx_ocotp_data *data;
+ int mac_offset_idx;
};
static struct ocotp_priv *imx_ocotp;
@@ -408,32 +419,28 @@ static void memreverse(void *dest, const void *src, size_t n)
static int imx_ocotp_get_mac(struct param_d *param, void *priv)
{
- struct ocotp_priv *ocotp_priv = priv;
- char buf[8];
+ char buf[MAC_BYTES];
int ret;
+ struct ocotp_priv_ethaddr *ethaddr = priv;
- ret = regmap_bulk_read(ocotp_priv->map, MAC_OFFSET, buf, MAC_BYTES);
+ ret = regmap_bulk_read(ethaddr->map, ethaddr->offset,
+ buf, MAC_BYTES);
if (ret < 0)
return ret;
- memreverse(ocotp_priv->ethaddr, buf, 6);
+ memreverse(ethaddr->value, buf, 6);
return 0;
}
static int imx_ocotp_set_mac(struct param_d *param, void *priv)
{
- struct ocotp_priv *ocotp_priv = priv;
- char buf[8];
- int ret;
+ char buf[MAC_BYTES];
+ struct ocotp_priv_ethaddr *ethaddr = priv;
- memreverse(buf, ocotp_priv->ethaddr, 6);
- buf[6] = 0; buf[7] = 0;
-
- ret = regmap_bulk_write(ocotp_priv->map, MAC_OFFSET, buf, MAC_BYTES);
- if (ret < 0)
- return ret;
+ memreverse(buf, ethaddr->value, 6);
- return 0;
+ return regmap_bulk_write(ethaddr->map, ethaddr->offset,
+ buf, MAC_BYTES);
}
static struct regmap_bus imx_ocotp_regmap_bus = {
@@ -492,9 +499,28 @@ static int imx_ocotp_probe(struct device_d *dev)
NULL, NULL, &priv->permanent_write_enable, NULL);
}
- if (IS_ENABLED(CONFIG_NET))
- dev_add_param_mac(&(priv->dev), "mac_addr", imx_ocotp_set_mac,
- imx_ocotp_get_mac, priv->ethaddr, priv);
+ if (IS_ENABLED(CONFIG_NET)) {
+ int i;
+ struct ocotp_priv_ethaddr *ethaddr;
+
+ for (i = 0; i < priv->data->mac_offsets_num; i++) {
+ ethaddr = &priv->ethaddr[i];
+ ethaddr->map = priv->map;
+ ethaddr->offset = priv->data->mac_offsets[i];
+
+ dev_add_param_mac(&priv->dev, xasprintf("mac_addr%d", i),
+ imx_ocotp_set_mac, imx_ocotp_get_mac,
+ ethaddr->value, ethaddr);
+ }
+
+ /*
+ * Alias to mac_addr0 for backwards compatibility
+ */
+ ethaddr = &priv->ethaddr[0];
+ dev_add_param_mac(&priv->dev, "mac_addr",
+ imx_ocotp_set_mac, imx_ocotp_get_mac,
+ ethaddr->value, ethaddr);
+ }
dev_add_param_bool(&(priv->dev), "sense_enable", NULL, NULL, &priv->sense_enable, priv);
@@ -533,16 +559,22 @@ static u32 vf610_addr_to_offset(u32 addr)
static struct imx_ocotp_data imx6q_ocotp_data = {
.num_regs = 512,
.addr_to_offset = imx6q_addr_to_offset,
+ .mac_offsets_num = 1,
+ .mac_offsets = { MAC_OFFSET_0 },
};
static struct imx_ocotp_data imx6sl_ocotp_data = {
.num_regs = 256,
.addr_to_offset = imx6sl_addr_to_offset,
+ .mac_offsets_num = 1,
+ .mac_offsets = { MAC_OFFSET_0 },
};
static struct imx_ocotp_data vf610_ocotp_data = {
.num_regs = 512,
.addr_to_offset = vf610_addr_to_offset,
+ .mac_offsets_num = 2,
+ .mac_offsets = { MAC_OFFSET_0, MAC_OFFSET_1 },
};
static __maybe_unused struct of_device_id imx_ocotp_dt_ids[] = {