ag71xx_mdio_rr(am, AG71XX_REG_MII_IND));
}
+static int ag71xx_mdio_wait_busy(struct ag71xx_mdio *am)
+{
+ int i;
+
+ for (i = 0; i < AG71XX_MDIO_RETRY; i++) {
+ u32 busy;
+
+ udelay(AG71XX_MDIO_DELAY);
+
+ busy = ag71xx_mdio_rr(am, AG71XX_REG_MII_IND);
+ if (!busy)
+ return 0;
+
+ udelay(AG71XX_MDIO_DELAY);
+ }
+
+ pr_err("%s: MDIO operation timed out\n", am->mii_bus->name);
+
+ return -ETIMEDOUT;
+}
+
int ag71xx_mdio_mii_read(struct ag71xx_mdio *am, int addr, int reg)
{
+ int err;
int ret;
- int i;
+
+ err = ag71xx_mdio_wait_busy(am);
+ if (err)
+ return 0xffff;
ag71xx_mdio_wr(am, AG71XX_REG_MII_CMD, MII_CMD_WRITE);
ag71xx_mdio_wr(am, AG71XX_REG_MII_ADDR,
((addr & 0xff) << MII_ADDR_SHIFT) | (reg & 0xff));
ag71xx_mdio_wr(am, AG71XX_REG_MII_CMD, MII_CMD_READ);
- i = AG71XX_MDIO_RETRY;
- while (ag71xx_mdio_rr(am, AG71XX_REG_MII_IND) & MII_IND_BUSY) {
- if (i-- == 0) {
- pr_err("%s: mii_read timed out\n", am->mii_bus->name);
- ret = 0xffff;
- goto out;
- }
- udelay(AG71XX_MDIO_DELAY);
- }
+ err = ag71xx_mdio_wait_busy(am);
+ if (err)
+ return 0xffff;
ret = ag71xx_mdio_rr(am, AG71XX_REG_MII_STATUS) & 0xffff;
ag71xx_mdio_wr(am, AG71XX_REG_MII_CMD, MII_CMD_WRITE);
DBG("mii_read: addr=%04x, reg=%04x, value=%04x\n", addr, reg, ret);
-out:
return ret;
}
void ag71xx_mdio_mii_write(struct ag71xx_mdio *am, int addr, int reg, u16 val)
{
- int i;
-
DBG("mii_write: addr=%04x, reg=%04x, value=%04x\n", addr, reg, val);
ag71xx_mdio_wr(am, AG71XX_REG_MII_ADDR,
((addr & 0xff) << MII_ADDR_SHIFT) | (reg & 0xff));
ag71xx_mdio_wr(am, AG71XX_REG_MII_CTRL, val);
- i = AG71XX_MDIO_RETRY;
- while (ag71xx_mdio_rr(am, AG71XX_REG_MII_IND) & MII_IND_BUSY) {
- if (i-- == 0) {
- pr_err("%s: mii_write timed out\n", am->mii_bus->name);
- break;
+ ag71xx_mdio_wait_busy(am);
+}
+
+static const u32 ar71xx_mdio_div_table[] = {
+ 4, 4, 6, 8, 10, 14, 20, 28,
+};
+
+static const u32 ar7240_mdio_div_table[] = {
+ 2, 2, 4, 6, 8, 12, 18, 26, 32, 40, 48, 56, 62, 70, 78, 96,
+};
+
+static const u32 ar933x_mdio_div_table[] = {
+ 4, 4, 6, 8, 10, 14, 20, 28, 34, 42, 50, 58, 66, 74, 82, 98,
+};
+
+static int ag71xx_mdio_get_divider(struct ag71xx_mdio *am, u32 *div)
+{
+ unsigned long ref_clock, mdio_clock;
+ const u32 *table;
+ int ndivs;
+ int i;
+
+ ref_clock = am->pdata->ref_clock;
+ mdio_clock = am->pdata->mdio_clock;
+
+ if (!ref_clock || !mdio_clock)
+ return -EINVAL;
+
+ if (am->pdata->is_ar9330 || am->pdata->is_ar934x) {
+ table = ar933x_mdio_div_table;
+ ndivs = ARRAY_SIZE(ar933x_mdio_div_table);
+ } else if (am->pdata->is_ar7240) {
+ table = ar7240_mdio_div_table;
+ ndivs = ARRAY_SIZE(ar7240_mdio_div_table);
+ } else {
+ table = ar71xx_mdio_div_table;
+ ndivs = ARRAY_SIZE(ar71xx_mdio_div_table);
+ }
+
+ for (i = 0; i < ndivs; i++) {
+ unsigned long t;
+
+ t = ref_clock / table[i];
+ if (t <= mdio_clock) {
+ *div = i;
+ return 0;
}
- udelay(AG71XX_MDIO_DELAY);
}
+
+ dev_err(&am->mii_bus->dev, "no divider found for %lu/%lu\n",
+ ref_clock, mdio_clock);
+ return -ENOENT;
}
static int ag71xx_mdio_reset(struct mii_bus *bus)
{
struct ag71xx_mdio *am = bus->priv;
u32 t;
+ int err;
- if (am->pdata->is_ar7240)
- t = MII_CFG_CLK_DIV_6;
- else
- t = MII_CFG_CLK_DIV_28;
+ err = ag71xx_mdio_get_divider(am, &t);
+ if (err) {
+ /* fallback */
+ if (am->pdata->is_ar7240)
+ t = MII_CFG_CLK_DIV_6;
+ else if (am->pdata->builtin_switch && !am->pdata->is_ar934x)
+ t = MII_CFG_CLK_DIV_10;
+ else if (!am->pdata->builtin_switch && am->pdata->is_ar934x)
+ t = MII_CFG_CLK_DIV_58;
+ else
+ t = MII_CFG_CLK_DIV_28;
+ }
ag71xx_mdio_wr(am, AG71XX_REG_MII_CFG, t | MII_CFG_RESET);
udelay(100);
ag71xx_mdio_wr(am, AG71XX_REG_MII_CFG, t);
udelay(100);
+ if (am->pdata->reset)
+ am->pdata->reset(bus);
+
return 0;
}
{
struct ag71xx_mdio *am = bus->priv;
- if (am->pdata->is_ar7240)
+ if (am->pdata->builtin_switch)
return ar7240sw_phy_read(bus, addr, reg);
else
return ag71xx_mdio_mii_read(am, addr, reg);
{
struct ag71xx_mdio *am = bus->priv;
- if (am->pdata->is_ar7240)
+ if (am->pdata->builtin_switch)
ar7240sw_phy_write(bus, addr, reg, val);
else
ag71xx_mdio_mii_write(am, addr, reg, val);
return 0;
}
-static int __devinit ag71xx_mdio_probe(struct platform_device *pdev)
+static int ag71xx_mdio_probe(struct platform_device *pdev)
{
struct ag71xx_mdio_platform_data *pdata;
struct ag71xx_mdio *am;
return err;
}
-static int __devexit ag71xx_mdio_remove(struct platform_device *pdev)
+static int ag71xx_mdio_remove(struct platform_device *pdev)
{
struct ag71xx_mdio *am = platform_get_drvdata(pdev);
static struct platform_driver ag71xx_mdio_driver = {
.probe = ag71xx_mdio_probe,
- .remove = __exit_p(ag71xx_mdio_remove),
+ .remove = ag71xx_mdio_remove,
.driver = {
.name = "ag71xx-mdio",
}