Messages in this thread Patch in this message | | | From | Peter Geis <> | Subject | [PATCH v3] net: phy: add driver for Motorcomm yt8511 phy | Date | Fri, 14 May 2021 07:58:26 -0400 |
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Add a driver for the Motorcomm yt8511 phy that will be used in the production Pine64 rk3566-quartz64 development board. It supports gigabit transfer speeds, rgmii, and 125mhz clk output.
Signed-off-by: Peter Geis <pgwipeout@gmail.com> --- Changes v3: - Add rgmii mode selection support
Changes v2: - Change to __phy_modify - Handle return errors - Remove unnecessary &
MAINTAINERS | 6 ++ drivers/net/phy/Kconfig | 6 ++ drivers/net/phy/Makefile | 1 + drivers/net/phy/motorcomm.c | 121 ++++++++++++++++++++++++++++++++++++ 4 files changed, 134 insertions(+) create mode 100644 drivers/net/phy/motorcomm.c
diff --git a/MAINTAINERS b/MAINTAINERS index 601b5ae0368a..2a2e406238fc 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -12388,6 +12388,12 @@ F: Documentation/userspace-api/media/drivers/meye* F: drivers/media/pci/meye/ F: include/uapi/linux/meye.h +MOTORCOMM PHY DRIVER +M: Peter Geis <pgwipeout@gmail.com> +L: netdev@vger.kernel.org +S: Maintained +F: drivers/net/phy/motorcomm.c + MOXA SMARTIO/INDUSTIO/INTELLIO SERIAL CARD S: Orphan F: Documentation/driver-api/serial/moxa-smartio.rst diff --git a/drivers/net/phy/Kconfig b/drivers/net/phy/Kconfig index 288bf405ebdb..16db9f8037b5 100644 --- a/drivers/net/phy/Kconfig +++ b/drivers/net/phy/Kconfig @@ -229,6 +229,12 @@ config MICROSEMI_PHY help Currently supports VSC8514, VSC8530, VSC8531, VSC8540 and VSC8541 PHYs +config MOTORCOMM_PHY + tristate "Motorcomm PHYs" + help + Enables support for Motorcomm network PHYs. + Currently supports the YT8511 gigabit PHY. + config NATIONAL_PHY tristate "National Semiconductor PHYs" help diff --git a/drivers/net/phy/Makefile b/drivers/net/phy/Makefile index bcda7ed2455d..37ffbc6e3c87 100644 --- a/drivers/net/phy/Makefile +++ b/drivers/net/phy/Makefile @@ -70,6 +70,7 @@ obj-$(CONFIG_MICREL_PHY) += micrel.o obj-$(CONFIG_MICROCHIP_PHY) += microchip.o obj-$(CONFIG_MICROCHIP_T1_PHY) += microchip_t1.o obj-$(CONFIG_MICROSEMI_PHY) += mscc/ +obj-$(CONFIG_MOTORCOMM_PHY) += motorcomm.o obj-$(CONFIG_NATIONAL_PHY) += national.o obj-$(CONFIG_NXP_C45_TJA11XX_PHY) += nxp-c45-tja11xx.o obj-$(CONFIG_NXP_TJA11XX_PHY) += nxp-tja11xx.o diff --git a/drivers/net/phy/motorcomm.c b/drivers/net/phy/motorcomm.c new file mode 100644 index 000000000000..b85f10efa28e --- /dev/null +++ b/drivers/net/phy/motorcomm.c @@ -0,0 +1,121 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Driver for Motorcomm PHYs + * + * Author: Peter Geis <pgwipeout@gmail.com> + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/phy.h> + +#define PHY_ID_YT8511 0x0000010a + +#define YT8511_PAGE_SELECT 0x1e +#define YT8511_PAGE 0x1f +#define YT8511_EXT_CLK_GATE 0x0c +#define YT8511_EXT_SLEEP_CTRL 0x27 + +/* 2b00 25m from pll + * 2b01 25m from xtl *default* + * 2b10 62.m from pll + * 2b11 125m from pll + */ +#define YT8511_CLK_125M (BIT(2) | BIT(1)) + +/* RX Delay enabled = 1.8ns 1000T, 8ns 10/100T */ +#define YT8511_DELAY_RX BIT(0) + +/* TX Delay is bits 7:4, default 0x5 + * Delay = 150ps * N - 250ps, Default = 500ps + */ +#define YT8511_DELAY_TX (0x5 << 4) + +static int yt8511_read_page(struct phy_device *phydev) +{ + return __phy_read(phydev, YT8511_PAGE_SELECT); +}; + +static int yt8511_write_page(struct phy_device *phydev, int page) +{ + return __phy_write(phydev, YT8511_PAGE_SELECT, page); +}; + +static int yt8511_config_init(struct phy_device *phydev) +{ + int ret, oldpage, val; + + /* set clock mode to 125mhz */ + oldpage = phy_select_page(phydev, YT8511_EXT_CLK_GATE); + if (oldpage < 0) + goto err_restore_page; + + ret = __phy_modify(phydev, YT8511_PAGE, 0, YT8511_CLK_125M); + if (ret < 0) + goto err_restore_page; + + /* set rgmii delay mode */ + val = __phy_read(phydev, YT8511_PAGE); + + switch (phydev->interface) { + case PHY_INTERFACE_MODE_RGMII: + val &= ~(YT8511_DELAY_RX | YT8511_DELAY_TX); + break; + case PHY_INTERFACE_MODE_RGMII_ID: + val |= YT8511_DELAY_RX | YT8511_DELAY_TX; + break; + case PHY_INTERFACE_MODE_RGMII_RXID: + val &= ~(YT8511_DELAY_TX); + val |= YT8511_DELAY_RX; + break; + case PHY_INTERFACE_MODE_RGMII_TXID: + val &= ~(YT8511_DELAY_RX); + val |= YT8511_DELAY_TX; + break; + default: /* leave everything alone in other modes */ + break; + } + + ret = __phy_write(phydev, YT8511_PAGE, val); + if (ret < 0) + goto err_restore_page; + + /* disable auto sleep */ + ret = __phy_write(phydev, YT8511_PAGE_SELECT, YT8511_EXT_SLEEP_CTRL); + if (ret < 0) + goto err_restore_page; + ret = __phy_modify(phydev, YT8511_PAGE, BIT(15), 0); + if (ret < 0) + goto err_restore_page; + +err_restore_page: + return phy_restore_page(phydev, oldpage, ret); +} + +static struct phy_driver motorcomm_phy_drvs[] = { + { + PHY_ID_MATCH_EXACT(PHY_ID_YT8511), + .name = "YT8511 Gigabit Ethernet", + .config_init = yt8511_config_init, + .get_features = genphy_read_abilities, + .config_aneg = genphy_config_aneg, + .read_status = genphy_read_status, + .suspend = genphy_suspend, + .resume = genphy_resume, + .read_page = yt8511_read_page, + .write_page = yt8511_write_page, + }, +}; + +module_phy_driver(motorcomm_phy_drvs); + +MODULE_DESCRIPTION("Motorcomm PHY driver"); +MODULE_AUTHOR("Peter Geis"); +MODULE_LICENSE("GPL"); + +static const struct mdio_device_id __maybe_unused motorcomm_tbl[] = { + { PHY_ID_MATCH_EXACT(PHY_ID_YT8511) }, + { /* sentinal */ } +}; + +MODULE_DEVICE_TABLE(mdio, motorcomm_tbl); -- 2.25.1
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