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b01b59a4fa
'struct mdio_device_id' is not modified in these drivers. Constifying these structures moves some data to a read-only section, so increase overall security. On a x86_64, with allmodconfig, as an example: Before: ====== text data bss dec hex filename 27014 12792 0 39806 9b7e drivers/net/phy/broadcom.o After: ===== text data bss dec hex filename 27206 12600 0 39806 9b7e drivers/net/phy/broadcom.o Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Link: https://patch.msgid.link/403c381b7d9156b67ad68ffc44b8eee70c5e86a9.1736691226.git.christophe.jaillet@wanadoo.fr Signed-off-by: Jakub Kicinski <kuba@kernel.org>
98 lines
2.4 KiB
C
98 lines
2.4 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Driver for the Renesas PHY uPD60620.
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*
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* Copyright (C) 2015 Softing Industrial Automation GmbH
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/phy.h>
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#define UPD60620_PHY_ID 0xb8242824
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/* Extended Registers and values */
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/* PHY Special Control/Status */
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#define PHY_PHYSCR 0x1F /* PHY.31 */
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#define PHY_PHYSCR_10MB 0x0004 /* PHY speed = 10mb */
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#define PHY_PHYSCR_100MB 0x0008 /* PHY speed = 100mb */
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#define PHY_PHYSCR_DUPLEX 0x0010 /* PHY Duplex */
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/* PHY Special Modes */
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#define PHY_SPM 0x12 /* PHY.18 */
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/* Init PHY */
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static int upd60620_config_init(struct phy_device *phydev)
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{
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/* Enable support for passive HUBs (could be a strap option) */
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/* PHYMODE: All speeds, HD in parallel detect */
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return phy_write(phydev, PHY_SPM, 0x0180 | phydev->mdio.addr);
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}
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/* Get PHY status from common registers */
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static int upd60620_read_status(struct phy_device *phydev)
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{
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int phy_state;
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/* Read negotiated state */
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phy_state = phy_read(phydev, MII_BMSR);
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if (phy_state < 0)
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return phy_state;
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phydev->link = 0;
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linkmode_zero(phydev->lp_advertising);
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phydev->pause = 0;
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phydev->asym_pause = 0;
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if (phy_state & (BMSR_ANEGCOMPLETE | BMSR_LSTATUS)) {
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phy_state = phy_read(phydev, PHY_PHYSCR);
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if (phy_state < 0)
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return phy_state;
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if (phy_state & (PHY_PHYSCR_10MB | PHY_PHYSCR_100MB)) {
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phydev->link = 1;
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phydev->speed = SPEED_10;
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phydev->duplex = DUPLEX_HALF;
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if (phy_state & PHY_PHYSCR_100MB)
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phydev->speed = SPEED_100;
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if (phy_state & PHY_PHYSCR_DUPLEX)
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phydev->duplex = DUPLEX_FULL;
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phy_state = phy_read(phydev, MII_LPA);
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if (phy_state < 0)
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return phy_state;
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mii_lpa_to_linkmode_lpa_t(phydev->lp_advertising,
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phy_state);
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phy_resolve_aneg_pause(phydev);
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}
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}
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return 0;
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}
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MODULE_DESCRIPTION("Renesas uPD60620 PHY driver");
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MODULE_AUTHOR("Bernd Edlinger <bernd.edlinger@hotmail.de>");
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MODULE_LICENSE("GPL");
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static struct phy_driver upd60620_driver[1] = { {
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.phy_id = UPD60620_PHY_ID,
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.phy_id_mask = 0xfffffffe,
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.name = "Renesas uPD60620",
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/* PHY_BASIC_FEATURES */
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.flags = 0,
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.config_init = upd60620_config_init,
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.read_status = upd60620_read_status,
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} };
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module_phy_driver(upd60620_driver);
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static const struct mdio_device_id __maybe_unused upd60620_tbl[] = {
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{ UPD60620_PHY_ID, 0xfffffffe },
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{ }
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};
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MODULE_DEVICE_TABLE(mdio, upd60620_tbl);
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