#include <linux/module.h>
#include <linux/ioport.h>
#include <linux/slab.h>
-#include <linux/interrupt.h>
#include <linux/init.h>
-#include <linux/delay.h>
+#include <linux/interrupt.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/mii.h>
-#include <linux/ethtool.h>
-#include <linux/bitops.h>
#include <linux/platform_device.h>
+#include <linux/mdio-bitbang.h>
#ifdef CONFIG_PPC_CPM_NEW_BINDING
#include <linux/of_platform.h>
#include "fs_enet.h"
struct bb_info {
+ struct mdiobb_ctrl ctrl;
__be32 __iomem *dir;
__be32 __iomem *dat;
u32 mdio_msk;
u32 mdc_msk;
- int delay;
};
/* FIXME: If any other users of GPIO crop up, then these will have to
return (in_be32(p) & m) != 0;
}
-static inline void mdio_active(struct bb_info *bitbang)
+static inline void mdio_dir(struct mdiobb_ctrl *ctrl, int dir)
{
- bb_set(bitbang->dir, bitbang->mdio_msk);
-}
+ struct bb_info *bitbang = container_of(ctrl, struct bb_info, ctrl);
-static inline void mdio_tristate(struct bb_info *bitbang)
-{
- bb_clr(bitbang->dir, bitbang->mdio_msk);
+ if (dir)
+ bb_set(bitbang->dir, bitbang->mdio_msk);
+ else
+ bb_clr(bitbang->dir, bitbang->mdio_msk);
+
+ /* Read back to flush the write. */
+ in_be32(bitbang->dir);
}
-static inline int mdio_read(struct bb_info *bitbang)
+static inline int mdio_read(struct mdiobb_ctrl *ctrl)
{
+ struct bb_info *bitbang = container_of(ctrl, struct bb_info, ctrl);
return bb_read(bitbang->dat, bitbang->mdio_msk);
}
-static inline void mdio(struct bb_info *bitbang, int what)
+static inline void mdio(struct mdiobb_ctrl *ctrl, int what)
{
+ struct bb_info *bitbang = container_of(ctrl, struct bb_info, ctrl);
+
if (what)
bb_set(bitbang->dat, bitbang->mdio_msk);
else
bb_clr(bitbang->dat, bitbang->mdio_msk);
+
+ /* Read back to flush the write. */
+ in_be32(bitbang->dat);
}
-static inline void mdc(struct bb_info *bitbang, int what)
+static inline void mdc(struct mdiobb_ctrl *ctrl, int what)
{
+ struct bb_info *bitbang = container_of(ctrl, struct bb_info, ctrl);
+
if (what)
bb_set(bitbang->dat, bitbang->mdc_msk);
else
bb_clr(bitbang->dat, bitbang->mdc_msk);
-}
-
-static inline void mii_delay(struct bb_info *bitbang)
-{
- udelay(bitbang->delay);
-}
-
-/* Utility to send the preamble, address, and register (common to read and write). */
-static void bitbang_pre(struct bb_info *bitbang , int read, u8 addr, u8 reg)
-{
- int j;
-
- /*
- * Send a 32 bit preamble ('1's) with an extra '1' bit for good measure.
- * The IEEE spec says this is a PHY optional requirement. The AMD
- * 79C874 requires one after power up and one after a MII communications
- * error. This means that we are doing more preambles than we need,
- * but it is safer and will be much more robust.
- */
-
- mdio_active(bitbang);
- mdio(bitbang, 1);
- for (j = 0; j < 32; j++) {
- mdc(bitbang, 0);
- mii_delay(bitbang);
- mdc(bitbang, 1);
- mii_delay(bitbang);
- }
-
- /* send the start bit (01) and the read opcode (10) or write (10) */
- mdc(bitbang, 0);
- mdio(bitbang, 0);
- mii_delay(bitbang);
- mdc(bitbang, 1);
- mii_delay(bitbang);
- mdc(bitbang, 0);
- mdio(bitbang, 1);
- mii_delay(bitbang);
- mdc(bitbang, 1);
- mii_delay(bitbang);
- mdc(bitbang, 0);
- mdio(bitbang, read);
- mii_delay(bitbang);
- mdc(bitbang, 1);
- mii_delay(bitbang);
- mdc(bitbang, 0);
- mdio(bitbang, !read);
- mii_delay(bitbang);
- mdc(bitbang, 1);
- mii_delay(bitbang);
-
- /* send the PHY address */
- for (j = 0; j < 5; j++) {
- mdc(bitbang, 0);
- mdio(bitbang, (addr & 0x10) != 0);
- mii_delay(bitbang);
- mdc(bitbang, 1);
- mii_delay(bitbang);
- addr <<= 1;
- }
- /* send the register address */
- for (j = 0; j < 5; j++) {
- mdc(bitbang, 0);
- mdio(bitbang, (reg & 0x10) != 0);
- mii_delay(bitbang);
- mdc(bitbang, 1);
- mii_delay(bitbang);
- reg <<= 1;
- }
+ /* Read back to flush the write. */
+ in_be32(bitbang->dat);
}
-static int fs_enet_mii_bb_read(struct mii_bus *bus , int phy_id, int location)
-{
- u16 rdreg;
- int ret, j;
- u8 addr = phy_id & 0xff;
- u8 reg = location & 0xff;
- struct bb_info* bitbang = bus->priv;
-
- bitbang_pre(bitbang, 1, addr, reg);
-
- /* tri-state our MDIO I/O pin so we can read */
- mdc(bitbang, 0);
- mdio_tristate(bitbang);
- mii_delay(bitbang);
- mdc(bitbang, 1);
- mii_delay(bitbang);
-
- /* check the turnaround bit: the PHY should be driving it to zero */
- if (mdio_read(bitbang) != 0) {
- /* PHY didn't drive TA low */
- for (j = 0; j < 32; j++) {
- mdc(bitbang, 0);
- mii_delay(bitbang);
- mdc(bitbang, 1);
- mii_delay(bitbang);
- }
- ret = -1;
- goto out;
- }
-
- mdc(bitbang, 0);
- mii_delay(bitbang);
-
- /* read 16 bits of register data, MSB first */
- rdreg = 0;
- for (j = 0; j < 16; j++) {
- mdc(bitbang, 1);
- mii_delay(bitbang);
- rdreg <<= 1;
- rdreg |= mdio_read(bitbang);
- mdc(bitbang, 0);
- mii_delay(bitbang);
- }
-
- mdc(bitbang, 1);
- mii_delay(bitbang);
- mdc(bitbang, 0);
- mii_delay(bitbang);
- mdc(bitbang, 1);
- mii_delay(bitbang);
-
- ret = rdreg;
-out:
- return ret;
-}
-
-static int fs_enet_mii_bb_write(struct mii_bus *bus, int phy_id, int location, u16 val)
-{
- int j;
- struct bb_info* bitbang = bus->priv;
-
- u8 addr = phy_id & 0xff;
- u8 reg = location & 0xff;
- u16 value = val & 0xffff;
-
- bitbang_pre(bitbang, 0, addr, reg);
-
- /* send the turnaround (10) */
- mdc(bitbang, 0);
- mdio(bitbang, 1);
- mii_delay(bitbang);
- mdc(bitbang, 1);
- mii_delay(bitbang);
- mdc(bitbang, 0);
- mdio(bitbang, 0);
- mii_delay(bitbang);
- mdc(bitbang, 1);
- mii_delay(bitbang);
-
- /* write 16 bits of register data, MSB first */
- for (j = 0; j < 16; j++) {
- mdc(bitbang, 0);
- mdio(bitbang, (value & 0x8000) != 0);
- mii_delay(bitbang);
- mdc(bitbang, 1);
- mii_delay(bitbang);
- value <<= 1;
- }
-
- /*
- * Tri-state the MDIO line.
- */
- mdio_tristate(bitbang);
- mdc(bitbang, 0);
- mii_delay(bitbang);
- mdc(bitbang, 1);
- mii_delay(bitbang);
- return 0;
-}
-
-static int fs_enet_mii_bb_reset(struct mii_bus *bus)
-{
- /*nothing here - dunno how to reset it*/
- return 0;
-}
+static struct mdiobb_ops bb_ops = {
+ .owner = THIS_MODULE,
+ .set_mdc = mdc,
+ .set_mdio_dir = mdio_dir,
+ .set_mdio_data = mdio,
+ .get_mdio_data = mdio_read,
+};
#ifdef CONFIG_PPC_CPM_NEW_BINDING
static int __devinit fs_mii_bitbang_init(struct mii_bus *bus,
bitbang->dat = bitbang->dir + 4;
bitbang->mdio_msk = 1 << (31 - mdio_pin);
bitbang->mdc_msk = 1 << (31 - mdc_pin);
- bitbang->delay = 1; /* 1 us between operations */
return 0;
}
int ret = -ENOMEM;
int i;
- new_bus = kzalloc(sizeof(struct mii_bus), GFP_KERNEL);
- if (!new_bus)
- goto out;
-
bitbang = kzalloc(sizeof(struct bb_info), GFP_KERNEL);
if (!bitbang)
- goto out_free_bus;
+ goto out;
+
+ bitbang->ctrl.ops = &bb_ops;
+
+ new_bus = alloc_mdio_bitbang(&bitbang->ctrl);
+ if (!new_bus)
+ goto out_free_priv;
- new_bus->priv = bitbang;
new_bus->name = "CPM2 Bitbanged MII",
- new_bus->read = &fs_enet_mii_bb_read,
- new_bus->write = &fs_enet_mii_bb_write,
- new_bus->reset = &fs_enet_mii_bb_reset,
ret = fs_mii_bitbang_init(new_bus, ofdev->node);
if (ret)
- goto out_free_bitbang;
+ goto out_free_bus;
new_bus->phy_mask = ~0;
new_bus->irq = kmalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL);
kfree(new_bus->irq);
out_unmap_regs:
iounmap(bitbang->dir);
-out_free_bitbang:
- kfree(bitbang);
out_free_bus:
kfree(new_bus);
+out_free_priv:
+ free_mdio_bitbang(new_bus);
out:
return ret;
}
struct bb_info *bitbang = bus->priv;
mdiobus_unregister(bus);
+ free_mdio_bitbang(bus);
dev_set_drvdata(&ofdev->dev, NULL);
kfree(bus->irq);
iounmap(bitbang->dir);
.remove = fs_enet_mdio_remove,
};
-int fs_enet_mdio_bb_init(void)
+static int fs_enet_mdio_bb_init(void)
{
return of_register_platform_driver(&fs_enet_bb_mdio_driver);
}
-void fs_enet_mdio_bb_exit(void)
+static void fs_enet_mdio_bb_exit(void)
{
of_unregister_platform_driver(&fs_enet_bb_mdio_driver);
}
bitbang->dat = (u32 __iomem *)fmpi->mdio_dat.offset;
bitbang->mdio_msk = 1U << (31 - fmpi->mdio_dat.bit);
bitbang->mdc_msk = 1U << (31 - fmpi->mdc_dat.bit);
- bitbang->delay = fmpi->delay;
return 0;
}
if (NULL == dev)
return -EINVAL;
- new_bus = kzalloc(sizeof(struct mii_bus), GFP_KERNEL);
+ bitbang = kzalloc(sizeof(struct bb_info), GFP_KERNEL);
- if (NULL == new_bus)
+ if (NULL == bitbang)
return -ENOMEM;
- bitbang = kzalloc(sizeof(struct bb_info), GFP_KERNEL);
+ bitbang->ctrl.ops = &bb_ops;
- if (NULL == bitbang)
+ new_bus = alloc_mdio_bitbang(&bitbang->ctrl);
+
+ if (NULL == new_bus)
return -ENOMEM;
new_bus->name = "BB MII Bus",
- new_bus->read = &fs_enet_mii_bb_read,
- new_bus->write = &fs_enet_mii_bb_write,
- new_bus->reset = &fs_enet_mii_bb_reset,
new_bus->id = pdev->id;
new_bus->phy_mask = ~0x9;
return 0;
bus_register_fail:
+ free_mdio_bitbang(new_bus);
kfree(bitbang);
- kfree(new_bus);
return err;
}
dev_set_drvdata(dev, NULL);
- iounmap((void *) (&bus->priv));
- bus->priv = NULL;
- kfree(bus);
+ free_mdio_bitbang(bus);
return 0;
}
{
driver_unregister(&fs_enet_bb_mdio_driver);
}
-
+#endif
projects / linux-2.6 / commitdiff