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Message-Id: <1457512657-15352-1-git-send-email-josright123@gmail.com>
Date: Wed, 9 Mar 2016 16:37:37 +0800
From: Joseph CHANG <josright123@...il.com>
To: Peter Korsgaard <jacmet@...site.dk>, netdev@...r.kernel.org,
linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Cc: Joseph CHANG <josright123@...il.com>
Subject: [PATCH 1/1] dm9601: enable EP3 interrupt and enhance eeprom functions
Enable chip's EP3 interrupt to get the link-up notify soon
immediately.
Add to maintain variant eeprom adapters which may have not right
dm9620x's format.
Add function dm9601_set_eeprom which tested good with ethtool
utility.
Signed-off-by: Joseph CHANG <josright123@...il.com>
---
drivers/net/usb/dm9601.c | 127 +++++++++++++++++++++++++++++++++++++++++++++--
1 file changed, 123 insertions(+), 4 deletions(-)
diff --git a/drivers/net/usb/dm9601.c b/drivers/net/usb/dm9601.c
index 0b4bdd3..3027a60 100644
--- a/drivers/net/usb/dm9601.c
+++ b/drivers/net/usb/dm9601.c
@@ -46,6 +46,9 @@
#define DM_GPR_DATA 0x1f
#define DM_CHIP_ID 0x2c
#define DM_MODE_CTRL 0x91 /* only on dm9620 */
+#define DM_USB_CTRL 0xf4
+
+#define USB_CTRL_EP3ACK 0x20
/* chip id values */
#define ID_DM9601 0
@@ -57,6 +60,9 @@
#define DM_TX_OVERHEAD 2 /* 2 byte header */
#define DM_RX_OVERHEAD 7 /* 3 byte header + 4 byte crc tail */
#define DM_TIMEOUT 1000
+#define DM_EP3I_VAL 0x07
+#define DM_CONF_INC 126
+#define MD96XX_EEPROM_MAGIC 0x9620
static int dm_read(struct usbnet *dev, u8 reg, u16 length, void *data)
{
@@ -146,13 +152,14 @@ static int dm_read_shared_word(struct usbnet *dev, int phy, u8 reg, __le16 *valu
return ret;
}
-static int dm_write_shared_word(struct usbnet *dev, int phy, u8 reg, __le16 value)
+static int dm_write_shared_word(struct usbnet *dev, int phy, u8 reg,
+ __le16 *value)
{
int ret, i;
mutex_lock(&dev->phy_mutex);
- ret = dm_write(dev, DM_SHARED_DATA, 2, &value);
+ ret = dm_write(dev, DM_SHARED_DATA, 2, value);
if (ret < 0)
goto out;
@@ -190,6 +197,77 @@ static int dm_read_eeprom_word(struct usbnet *dev, u8 offset, void *value)
return dm_read_shared_word(dev, 0, offset, value);
}
+static void dm_write_eeprom_word(struct usbnet *dev, u8 offset, void *data)
+{
+ dm_write_shared_word(dev, 0, offset, data);
+}
+
+static int dm_render_write(struct usbnet *dev, u8 wordoffset, u16 mask_word,
+ u16 orset_word, u16 *pmd)
+{
+ u16 srom;
+
+ dm_read_eeprom_word(dev, wordoffset, &srom);
+ if ((srom & mask_word) == orset_word)
+ return 0;
+
+ srom &= ~mask_word;
+ srom |= orset_word;
+
+ dm_write_eeprom_word(dev, wordoffset, &srom);
+ *pmd = srom;
+ return 1;
+}
+
+static void dm_render_report(struct usbnet *dev, u8 wordoffset, u16 md)
+{
+ int i = 0;
+ u16 srom;
+
+ do {
+ i++;
+ usleep_range(100, 200);
+ dm_read_eeprom_word(dev, wordoffset, &srom);
+ if (i == 8)
+ break;
+ } while (srom != md);
+
+ if (srom == md) {
+ netdev_info(dev->net, "set eeprom word%d 0x%04x\n",
+ wordoffset, md);
+ } else {
+ netdev_info(dev->net, "warning - set eeprom word%d 0x%04x\n",
+ wordoffset, md);
+ netdev_info(dev->net, "warning - fail as eeprom word%d 0x%04x\n",
+ wordoffset, srom);
+ }
+}
+
+static void dm_eeprom_render(struct usbnet *dev, u8 wordoffset,
+ u16 orset_word, u16 mask_word)
+{
+ u16 m;
+
+ if (!dm_render_write(dev, wordoffset, mask_word, orset_word, &m))
+ return;
+
+ dm_render_report(dev, wordoffset, m);
+}
+
+static void dm_render_begin(struct usbnet *dev)
+{
+ /* Render eeprom if need, WORD3 render, set D[15:14] 01b */
+ dm_eeprom_render(dev, 3, 0x4000, 0xc000);
+ /* Render eeprom if need, WORD7 render, clear D[10] */
+ dm_eeprom_render(dev, 7, 0x0000, 0x0400);
+ /* Render eeprom if need, WORD11 render, need 0x005a */
+ dm_eeprom_render(dev, 11, 0x005a, 0xffff);
+ /* Render eeprom if need, WORD12 render, need 0x0007 */
+ dm_eeprom_render(dev, 12, DM_EP3I_VAL, 0xffff);
+ /* Render eeprom if need, WORD15 render, need E.g.126 (0x007e) */
+ dm_eeprom_render(dev, 15, (u16)(DM_CONF_INC << 8), 0xffff);
+}
+
static int dm9601_get_eeprom_len(struct net_device *dev)
@@ -216,6 +294,41 @@ static int dm9601_get_eeprom(struct net_device *net,
return 0;
}
+static int dm9601_set_eeprom(struct net_device *net,
+ struct ethtool_eeprom *eeprom, u8 *data)
+{
+ struct usbnet *dev = netdev_priv(net);
+ int offset = eeprom->offset;
+ int len = eeprom->len;
+ int done;
+
+ if (eeprom->magic != MD96XX_EEPROM_MAGIC) {
+ netdev_dbg(dev->net, "EEPROM: magic value mismatch, magic = 0x%x",
+ eeprom->magic);
+ return -EINVAL;
+ }
+
+ while (len > 0) {
+ if (len & 1 || offset & 1) {
+ int which = offset & 1;
+ u8 tmp[2];
+
+ dm_read_eeprom_word(dev, offset / 2, tmp);
+ tmp[which] = *data;
+ dm_write_eeprom_word(dev, offset / 2, tmp);
+ mdelay(10);
+ done = 1;
+ } else {
+ dm_write_eeprom_word(dev, offset / 2, data);
+ done = 2;
+ }
+ data += done;
+ offset += done;
+ len -= done;
+ }
+ return 0;
+}
+
static int dm9601_mdio_read(struct net_device *netdev, int phy_id, int loc)
{
struct usbnet *dev = netdev_priv(netdev);
@@ -250,7 +363,7 @@ static void dm9601_mdio_write(struct net_device *netdev, int phy_id, int loc,
netdev_dbg(dev->net, "dm9601_mdio_write() phy_id=0x%02x, loc=0x%02x, val=0x%04x\n",
phy_id, loc, val);
- dm_write_shared_word(dev, 1, loc, res);
+ dm_write_shared_word(dev, 1, loc, &res);
}
static void dm9601_get_drvinfo(struct net_device *net,
@@ -281,6 +394,7 @@ static const struct ethtool_ops dm9601_ethtool_ops = {
.set_msglevel = usbnet_set_msglevel,
.get_eeprom_len = dm9601_get_eeprom_len,
.get_eeprom = dm9601_get_eeprom,
+ .set_eeprom = dm9601_set_eeprom,
.get_settings = usbnet_get_settings,
.set_settings = usbnet_set_settings,
.nway_reset = usbnet_nway_reset,
@@ -344,7 +458,7 @@ static const struct net_device_ops dm9601_netdev_ops = {
.ndo_tx_timeout = usbnet_tx_timeout,
.ndo_change_mtu = usbnet_change_mtu,
.ndo_validate_addr = eth_validate_addr,
- .ndo_do_ioctl = dm9601_ioctl,
+ .ndo_do_ioctl = dm9601_ioctl,
.ndo_set_rx_mode = dm9601_set_multicast,
.ndo_set_mac_address = dm9601_set_mac_address,
};
@@ -414,6 +528,11 @@ static int dm9601_bind(struct usbnet *dev, struct usb_interface *intf)
goto out;
}
dm_write_reg(dev, DM_MODE_CTRL, mode & 0x7f);
+
+ /* Always return 8-bytes data to host per interrupt-interval */
+ dm_write_reg(dev, DM_USB_CTRL, USB_CTRL_EP3ACK);
+
+ dm_render_begin(dev);
}
/* power up phy */
--
2.1.4
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