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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>
99 lines
2.1 KiB
C
99 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright 2017 NXP
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*
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* CORTINA is a registered trademark of Cortina Systems, Inc.
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*
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*/
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#include <linux/module.h>
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#include <linux/phy.h>
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#define PHY_ID_CS4340 0x13e51002
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#define VILLA_GLOBAL_CHIP_ID_LSB 0x0
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#define VILLA_GLOBAL_CHIP_ID_MSB 0x1
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#define VILLA_GLOBAL_GPIO_1_INTS 0x017
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static int cortina_read_reg(struct phy_device *phydev, u16 regnum)
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{
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return mdiobus_c45_read(phydev->mdio.bus, phydev->mdio.addr, 0, regnum);
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}
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static int cortina_read_status(struct phy_device *phydev)
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{
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int gpio_int_status, ret = 0;
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gpio_int_status = cortina_read_reg(phydev, VILLA_GLOBAL_GPIO_1_INTS);
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if (gpio_int_status < 0) {
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ret = gpio_int_status;
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goto err;
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}
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if (gpio_int_status & 0x8) {
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/* up when edc_convergedS set */
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phydev->speed = SPEED_10000;
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phydev->duplex = DUPLEX_FULL;
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phydev->link = 1;
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} else {
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phydev->link = 0;
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}
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err:
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return ret;
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}
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static int cortina_probe(struct phy_device *phydev)
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{
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u32 phy_id = 0;
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int id_lsb = 0, id_msb = 0;
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/* Read device id from phy registers. */
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id_lsb = cortina_read_reg(phydev, VILLA_GLOBAL_CHIP_ID_LSB);
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if (id_lsb < 0)
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return -ENXIO;
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phy_id = id_lsb << 16;
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id_msb = cortina_read_reg(phydev, VILLA_GLOBAL_CHIP_ID_MSB);
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if (id_msb < 0)
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return -ENXIO;
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phy_id |= id_msb;
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/* Make sure the device tree binding matched the driver with the
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* right device.
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*/
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if (phy_id != phydev->drv->phy_id) {
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phydev_err(phydev, "Error matching phy with %s driver\n",
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phydev->drv->name);
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return -ENODEV;
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}
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return 0;
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}
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static struct phy_driver cortina_driver[] = {
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{
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.phy_id = PHY_ID_CS4340,
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.phy_id_mask = 0xffffffff,
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.name = "Cortina CS4340",
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.features = PHY_10GBIT_FEATURES,
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.config_aneg = gen10g_config_aneg,
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.read_status = cortina_read_status,
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.probe = cortina_probe,
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},
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};
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module_phy_driver(cortina_driver);
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static const struct mdio_device_id __maybe_unused cortina_tbl[] = {
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{ PHY_ID_CS4340, 0xffffffff},
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{},
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};
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MODULE_DEVICE_TABLE(mdio, cortina_tbl);
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MODULE_DESCRIPTION("Cortina EDC CDR 10G Ethernet PHY driver");
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MODULE_AUTHOR("NXP");
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MODULE_LICENSE("GPL");
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