PHY fixed driver: rework release path and update phy_id notation
device_bind_driver() error code returning has been fixed. release() function has been written, so that to free resources in correct way; the release path is now clean. Before the rework, it used to cause Device 'fixed@100:1' does not have a release() function, it is broken and must be fixed. BUG: at drivers/base/core.c:104 device_release() Call Trace: [<ffffffff802ec380>] kobject_cleanup+0x53/0x7e [<ffffffff802ec3ab>] kobject_release+0x0/0x9 [<ffffffff802ecf3f>] kref_put+0x74/0x81 [<ffffffff8035493b>] fixed_mdio_register_device+0x230/0x265 [<ffffffff80564d31>] fixed_init+0x1f/0x35 [<ffffffff802071a4>] init+0x147/0x2fb [<ffffffff80223b6e>] schedule_tail+0x36/0x92 [<ffffffff8020a678>] child_rip+0xa/0x12 [<ffffffff80311714>] acpi_ds_init_one_object+0x0/0x83 [<ffffffff8020705d>] init+0x0/0x2fb [<ffffffff8020a66e>] child_rip+0x0/0x12 Also changed the notation of the fixed phy definition on mdio bus to the form of <speed>+<duplex> to make it able to be used by gianfar and ucc_geth that define phy_id strictly as "%d:%d" and cleaned up the whitespace issues. Signed-off-by: Vitaly Bordug <vitb@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Vitaly Bordug
David S. Miller
parent
cdcc520d7b
commit
7c32f470f4
3 changed files with 207 additions and 155 deletions
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@ -76,4 +76,18 @@ config FIXED_MII_100_FDX
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bool "Emulation for 100M Fdx fixed PHY behavior"
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depends on FIXED_PHY
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config FIXED_MII_1000_FDX
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bool "Emulation for 1000M Fdx fixed PHY behavior"
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depends on FIXED_PHY
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config FIXED_MII_AMNT
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int "Number of emulated PHYs to allocate "
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depends on FIXED_PHY
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default "1"
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---help---
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Sometimes it is required to have several independent emulated
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PHYs on the bus (in case of multi-eth but phy-less HW for instance).
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This control will have specified number allocated for each fixed
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PHY type enabled.
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endif # PHYLIB
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@ -30,53 +30,31 @@
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#include <linux/mii.h>
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#include <linux/ethtool.h>
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#include <linux/phy.h>
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#include <linux/phy_fixed.h>
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#include <asm/io.h>
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#include <asm/irq.h>
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#include <asm/uaccess.h>
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#define MII_REGS_NUM 7
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/*
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The idea is to emulate normal phy behavior by responding with
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pre-defined values to mii BMCR read, so that read_status hook could
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take all the needed info.
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*/
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struct fixed_phy_status {
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u8 link;
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u16 speed;
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u8 duplex;
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};
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/*-----------------------------------------------------------------------------
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* Private information hoder for mii_bus
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*-----------------------------------------------------------------------------*/
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struct fixed_info {
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u16 *regs;
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u8 regs_num;
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struct fixed_phy_status phy_status;
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struct phy_device *phydev; /* pointer to the container */
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/* link & speed cb */
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int(*link_update)(struct net_device*, struct fixed_phy_status*);
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};
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/* we need to track the allocated pointers in order to free them on exit */
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static struct fixed_info *fixed_phy_ptrs[CONFIG_FIXED_MII_AMNT*MAX_PHY_AMNT];
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/*-----------------------------------------------------------------------------
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* If something weird is required to be done with link/speed,
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* network driver is able to assign a function to implement this.
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* May be useful for PHY's that need to be software-driven.
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*-----------------------------------------------------------------------------*/
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int fixed_mdio_set_link_update(struct phy_device* phydev,
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int(*link_update)(struct net_device*, struct fixed_phy_status*))
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int fixed_mdio_set_link_update(struct phy_device *phydev,
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int (*link_update) (struct net_device *,
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struct fixed_phy_status *))
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{
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struct fixed_info *fixed;
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if(link_update == NULL)
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if (link_update == NULL)
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return -EINVAL;
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if(phydev) {
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if(phydev->bus) {
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if (phydev) {
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if (phydev->bus) {
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fixed = phydev->bus->priv;
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fixed->link_update = link_update;
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return 0;
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@ -84,54 +62,64 @@ int fixed_mdio_set_link_update(struct phy_device* phydev,
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}
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return -EINVAL;
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}
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EXPORT_SYMBOL(fixed_mdio_set_link_update);
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struct fixed_info *fixed_mdio_get_phydev (int phydev_ind)
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{
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if (phydev_ind >= MAX_PHY_AMNT)
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return NULL;
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return fixed_phy_ptrs[phydev_ind];
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}
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EXPORT_SYMBOL(fixed_mdio_get_phydev);
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/*-----------------------------------------------------------------------------
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* This is used for updating internal mii regs from the status
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*-----------------------------------------------------------------------------*/
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#if defined(CONFIG_FIXED_MII_100_FDX) || defined(CONFIG_FIXED_MII_10_FDX)
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#if defined(CONFIG_FIXED_MII_100_FDX) || defined(CONFIG_FIXED_MII_10_FDX) || defined(CONFIG_FIXED_MII_1000_FDX)
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static int fixed_mdio_update_regs(struct fixed_info *fixed)
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{
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u16 *regs = fixed->regs;
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u16 bmsr = 0;
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u16 bmcr = 0;
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if(!regs) {
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if (!regs) {
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printk(KERN_ERR "%s: regs not set up", __FUNCTION__);
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return -EINVAL;
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}
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if(fixed->phy_status.link)
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if (fixed->phy_status.link)
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bmsr |= BMSR_LSTATUS;
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if(fixed->phy_status.duplex) {
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if (fixed->phy_status.duplex) {
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bmcr |= BMCR_FULLDPLX;
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switch ( fixed->phy_status.speed ) {
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switch (fixed->phy_status.speed) {
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case 100:
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bmsr |= BMSR_100FULL;
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bmcr |= BMCR_SPEED100;
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break;
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break;
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case 10:
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bmsr |= BMSR_10FULL;
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break;
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break;
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}
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} else {
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switch ( fixed->phy_status.speed ) {
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switch (fixed->phy_status.speed) {
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case 100:
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bmsr |= BMSR_100HALF;
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bmcr |= BMCR_SPEED100;
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break;
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break;
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case 10:
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bmsr |= BMSR_100HALF;
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break;
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break;
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}
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}
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regs[MII_BMCR] = bmcr;
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regs[MII_BMSR] = bmsr | 0x800; /*we are always capable of 10 hdx*/
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regs[MII_BMCR] = bmcr;
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regs[MII_BMSR] = bmsr | 0x800; /*we are always capable of 10 hdx */
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return 0;
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}
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@ -141,29 +129,30 @@ static int fixed_mii_read(struct mii_bus *bus, int phy_id, int location)
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struct fixed_info *fixed = bus->priv;
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/* if user has registered link update callback, use it */
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if(fixed->phydev)
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if(fixed->phydev->attached_dev) {
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if(fixed->link_update) {
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if (fixed->phydev)
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if (fixed->phydev->attached_dev) {
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if (fixed->link_update) {
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fixed->link_update(fixed->phydev->attached_dev,
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&fixed->phy_status);
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&fixed->phy_status);
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fixed_mdio_update_regs(fixed);
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}
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}
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}
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if ((unsigned int)location >= fixed->regs_num)
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return -1;
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return fixed->regs[location];
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}
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static int fixed_mii_write(struct mii_bus *bus, int phy_id, int location, u16 val)
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static int fixed_mii_write(struct mii_bus *bus, int phy_id, int location,
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u16 val)
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{
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/* do nothing for now*/
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/* do nothing for now */
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return 0;
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}
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static int fixed_mii_reset(struct mii_bus *bus)
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{
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/*nothing here - no way/need to reset it*/
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/*nothing here - no way/need to reset it */
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return 0;
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}
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#endif
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@ -171,8 +160,8 @@ static int fixed_mii_reset(struct mii_bus *bus)
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static int fixed_config_aneg(struct phy_device *phydev)
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{
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/* :TODO:03/13/2006 09:45:37 PM::
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The full autoneg funcionality can be emulated,
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but no need to have anything here for now
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The full autoneg funcionality can be emulated,
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but no need to have anything here for now
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*/
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return 0;
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}
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@ -182,59 +171,79 @@ static int fixed_config_aneg(struct phy_device *phydev)
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* match will never return true...
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*-----------------------------------------------------------------------------*/
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static struct phy_driver fixed_mdio_driver = {
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.name = "Fixed PHY",
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.features = PHY_BASIC_FEATURES,
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.config_aneg = fixed_config_aneg,
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.read_status = genphy_read_status,
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.driver = { .owner = THIS_MODULE,},
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.name = "Fixed PHY",
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#ifdef CONFIG_FIXED_MII_1000_FDX
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.features = PHY_GBIT_FEATURES,
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#else
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.features = PHY_BASIC_FEATURES,
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#endif
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.config_aneg = fixed_config_aneg,
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.read_status = genphy_read_status,
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.driver = { .owner = THIS_MODULE, },
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};
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static void fixed_mdio_release(struct device *dev)
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{
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struct phy_device *phydev = container_of(dev, struct phy_device, dev);
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struct mii_bus *bus = phydev->bus;
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struct fixed_info *fixed = bus->priv;
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kfree(phydev);
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kfree(bus->dev);
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kfree(bus);
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kfree(fixed->regs);
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kfree(fixed);
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}
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/*-----------------------------------------------------------------------------
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* This func is used to create all the necessary stuff, bind
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* the fixed phy driver and register all it on the mdio_bus_type.
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* speed is either 10 or 100, duplex is boolean.
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* speed is either 10 or 100 or 1000, duplex is boolean.
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* number is used to create multiple fixed PHYs, so that several devices can
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* utilize them simultaneously.
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*
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* The device on mdio bus will look like [bus_id]:[phy_id],
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* bus_id = number
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* phy_id = speed+duplex.
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*-----------------------------------------------------------------------------*/
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#if defined(CONFIG_FIXED_MII_100_FDX) || defined(CONFIG_FIXED_MII_10_FDX)
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static int fixed_mdio_register_device(int number, int speed, int duplex)
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#if defined(CONFIG_FIXED_MII_100_FDX) || defined(CONFIG_FIXED_MII_10_FDX) || defined(CONFIG_FIXED_MII_1000_FDX)
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struct fixed_info *fixed_mdio_register_device(
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int bus_id, int speed, int duplex, u8 phy_id)
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{
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struct mii_bus *new_bus;
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struct fixed_info *fixed;
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struct phy_device *phydev;
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int err = 0;
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int err;
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struct device* dev = kzalloc(sizeof(struct device), GFP_KERNEL);
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struct device *dev = kzalloc(sizeof(struct device), GFP_KERNEL);
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if (NULL == dev)
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return -ENOMEM;
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if (dev == NULL)
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goto err_dev_alloc;
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new_bus = kzalloc(sizeof(struct mii_bus), GFP_KERNEL);
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if (NULL == new_bus) {
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kfree(dev);
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return -ENOMEM;
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}
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if (new_bus == NULL)
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goto err_bus_alloc;
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fixed = kzalloc(sizeof(struct fixed_info), GFP_KERNEL);
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if (NULL == fixed) {
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kfree(dev);
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kfree(new_bus);
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return -ENOMEM;
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}
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if (fixed == NULL)
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goto err_fixed_alloc;
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fixed->regs = kzalloc(MII_REGS_NUM * sizeof(int), GFP_KERNEL);
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if (NULL == fixed->regs)
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goto err_fixed_regs_alloc;
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fixed->regs = kzalloc(MII_REGS_NUM*sizeof(int), GFP_KERNEL);
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fixed->regs_num = MII_REGS_NUM;
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fixed->phy_status.speed = speed;
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fixed->phy_status.duplex = duplex;
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fixed->phy_status.link = 1;
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new_bus->name = "Fixed MII Bus",
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new_bus->read = &fixed_mii_read,
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new_bus->write = &fixed_mii_write,
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new_bus->reset = &fixed_mii_reset,
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/*set up workspace*/
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new_bus->name = "Fixed MII Bus";
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new_bus->read = &fixed_mii_read;
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new_bus->write = &fixed_mii_write;
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new_bus->reset = &fixed_mii_reset;
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/*set up workspace */
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fixed_mdio_update_regs(fixed);
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new_bus->priv = fixed;
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@ -243,119 +252,110 @@ static int fixed_mdio_register_device(int number, int speed, int duplex)
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/* create phy_device and register it on the mdio bus */
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phydev = phy_device_create(new_bus, 0, 0);
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if (phydev == NULL)
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goto err_phy_dev_create;
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/*
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Put the phydev pointer into the fixed pack so that bus read/write code could
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be able to access for instance attached netdev. Well it doesn't have to do
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so, only in case of utilizing user-specified link-update...
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* Put the phydev pointer into the fixed pack so that bus read/write
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* code could be able to access for instance attached netdev. Well it
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* doesn't have to do so, only in case of utilizing user-specified
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* link-update...
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*/
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fixed->phydev = phydev;
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if(NULL == phydev) {
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err = -ENOMEM;
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goto device_create_fail;
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}
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fixed->phydev = phydev;
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phydev->speed = speed;
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phydev->duplex = duplex;
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phydev->irq = PHY_IGNORE_INTERRUPT;
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phydev->dev.bus = &mdio_bus_type;
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if(number)
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snprintf(phydev->dev.bus_id, BUS_ID_SIZE,
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"fixed_%d@%d:%d", number, speed, duplex);
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else
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snprintf(phydev->dev.bus_id, BUS_ID_SIZE,
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"fixed@%d:%d", speed, duplex);
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snprintf(phydev->dev.bus_id, BUS_ID_SIZE,
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PHY_ID_FMT, bus_id, phy_id);
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phydev->bus = new_bus;
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err = device_register(&phydev->dev);
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if(err) {
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printk(KERN_ERR "Phy %s failed to register\n",
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phydev->dev.bus_id);
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goto bus_register_fail;
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}
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/*
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the mdio bus has phy_id match... In order not to do it
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artificially, we are binding the driver here by hand;
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it will be the same for all the fixed phys anyway.
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*/
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phydev->dev.driver = &fixed_mdio_driver.driver;
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phydev->dev.release = fixed_mdio_release;
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err = phydev->dev.driver->probe(&phydev->dev);
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if(err < 0) {
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printk(KERN_ERR "Phy %s: problems with fixed driver\n",phydev->dev.bus_id);
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goto probe_fail;
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if (err < 0) {
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printk(KERN_ERR "Phy %s: problems with fixed driver\n",
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phydev->dev.bus_id);
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goto err_out;
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}
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err = device_register(&phydev->dev);
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if (err) {
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printk(KERN_ERR "Phy %s failed to register\n",
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phydev->dev.bus_id);
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goto err_out;
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}
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//phydev->state = PHY_RUNNING; /* make phy go up quick, but in 10Mbit/HDX
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return fixed;
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err = device_bind_driver(&phydev->dev);
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if (err)
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goto probe_fail;
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return 0;
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probe_fail:
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device_unregister(&phydev->dev);
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bus_register_fail:
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err_out:
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kfree(phydev);
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device_create_fail:
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kfree(dev);
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kfree(new_bus);
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err_phy_dev_create:
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kfree(fixed->regs);
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err_fixed_regs_alloc:
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kfree(fixed);
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err_fixed_alloc:
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kfree(new_bus);
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err_bus_alloc:
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kfree(dev);
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err_dev_alloc:
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return NULL;
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return err;
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}
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#endif
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MODULE_DESCRIPTION("Fixed PHY device & driver for PAL");
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MODULE_AUTHOR("Vitaly Bordug");
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MODULE_LICENSE("GPL");
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static int __init fixed_init(void)
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{
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#if 0
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int ret;
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int duplex = 0;
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#endif
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/* register on the bus... Not expected to be matched with anything there... */
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int cnt = 0;
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int i;
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/* register on the bus... Not expected to be matched
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* with anything there...
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*
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*/
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phy_driver_register(&fixed_mdio_driver);
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/* So let the fun begin...
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We will create several mdio devices here, and will bound the upper
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driver to them.
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Then the external software can lookup the phy bus by searching
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fixed@speed:duplex, e.g. fixed@100:1, to be connected to the
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virtual 100M Fdx phy.
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In case several virtual PHYs required, the bus_id will be in form
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fixed_<num>@<speed>:<duplex>, which make it able even to define
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driver-specific link control callback, if for instance PHY is completely
|
||||
SW-driven.
|
||||
|
||||
*/
|
||||
|
||||
#ifdef CONFIG_FIXED_MII_DUPLEX
|
||||
#if 0
|
||||
duplex = 1;
|
||||
/* We will create several mdio devices here, and will bound the upper
|
||||
* driver to them.
|
||||
*
|
||||
* Then the external software can lookup the phy bus by searching
|
||||
* for 0:101, to be connected to the virtual 100M Fdx phy.
|
||||
*
|
||||
* In case several virtual PHYs required, the bus_id will be in form
|
||||
* [num]:[duplex]+[speed], which make it able even to define
|
||||
* driver-specific link control callback, if for instance PHY is
|
||||
* completely SW-driven.
|
||||
*/
|
||||
for (i=1; i <= CONFIG_FIXED_MII_AMNT; i++) {
|
||||
#ifdef CONFIG_FIXED_MII_1000_FDX
|
||||
fixed_phy_ptrs[cnt++] = fixed_mdio_register_device(0, 1000, 1, i);
|
||||
#endif
|
||||
#endif
|
||||
|
||||
#ifdef CONFIG_FIXED_MII_100_FDX
|
||||
fixed_mdio_register_device(0, 100, 1);
|
||||
fixed_phy_ptrs[cnt++] = fixed_mdio_register_device(1, 100, 1, i);
|
||||
#endif
|
||||
|
||||
#ifdef CONFIG_FIXED_MII_10_FDX
|
||||
fixed_mdio_register_device(0, 10, 1);
|
||||
fixed_phy_ptrs[cnt++] = fixed_mdio_register_device(2, 10, 1, i);
|
||||
#endif
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void __exit fixed_exit(void)
|
||||
{
|
||||
int i;
|
||||
|
||||
phy_driver_unregister(&fixed_mdio_driver);
|
||||
/* :WARNING:02/18/2006 04:32:40 AM:: Cleanup all the created stuff */
|
||||
for (i=0; i < MAX_PHY_AMNT; i++)
|
||||
if ( fixed_phy_ptrs[i] )
|
||||
device_unregister(&fixed_phy_ptrs[i]->phydev->dev);
|
||||
}
|
||||
|
||||
module_init(fixed_init);
|
||||
|
|
|
|||
38
include/linux/phy_fixed.h
Normal file
38
include/linux/phy_fixed.h
Normal file
|
|
@ -0,0 +1,38 @@
|
|||
#ifndef __PHY_FIXED_H
|
||||
#define __PHY_FIXED_H
|
||||
|
||||
#define MII_REGS_NUM 29
|
||||
|
||||
/* max number of virtual phy stuff */
|
||||
#define MAX_PHY_AMNT 10
|
||||
/*
|
||||
The idea is to emulate normal phy behavior by responding with
|
||||
pre-defined values to mii BMCR read, so that read_status hook could
|
||||
take all the needed info.
|
||||
*/
|
||||
|
||||
struct fixed_phy_status {
|
||||
u8 link;
|
||||
u16 speed;
|
||||
u8 duplex;
|
||||
};
|
||||
|
||||
/*-----------------------------------------------------------------------------
|
||||
* Private information hoder for mii_bus
|
||||
*-----------------------------------------------------------------------------*/
|
||||
struct fixed_info {
|
||||
u16 *regs;
|
||||
u8 regs_num;
|
||||
struct fixed_phy_status phy_status;
|
||||
struct phy_device *phydev; /* pointer to the container */
|
||||
/* link & speed cb */
|
||||
int (*link_update) (struct net_device *, struct fixed_phy_status *);
|
||||
|
||||
};
|
||||
|
||||
|
||||
int fixed_mdio_set_link_update(struct phy_device *,
|
||||
int (*link_update) (struct net_device *, struct fixed_phy_status *));
|
||||
struct fixed_info *fixed_mdio_get_phydev (int phydev_ind);
|
||||
|
||||
#endif /* __PHY_FIXED_H */
|
||||
Loading…
Reference in a new issue