diff options
Diffstat (limited to 'target/linux/ipq40xx/patches-5.4/700-net-add-qualcomm-mdio.patch')
| -rw-r--r-- | target/linux/ipq40xx/patches-5.4/700-net-add-qualcomm-mdio.patch | 225 |
1 files changed, 225 insertions, 0 deletions
diff --git a/target/linux/ipq40xx/patches-5.4/700-net-add-qualcomm-mdio.patch b/target/linux/ipq40xx/patches-5.4/700-net-add-qualcomm-mdio.patch new file mode 100644 index 0000000000..e939597b8e --- /dev/null +++ b/target/linux/ipq40xx/patches-5.4/700-net-add-qualcomm-mdio.patch @@ -0,0 +1,225 @@ +--- a/drivers/net/phy/Kconfig ++++ b/drivers/net/phy/Kconfig +@@ -519,6 +519,13 @@ config XILINX_GMII2RGMII + the Reduced Gigabit Media Independent Interface(RGMII) between + Ethernet physical media devices and the Gigabit Ethernet controller. + ++config MDIO_IPQ40XX ++ tristate "Qualcomm Atheros ipq40xx MDIO interface" ++ depends on HAS_IOMEM && OF ++ ---help--- ++ This driver supports the MDIO interface found in Qualcomm ++ Atheros ipq40xx Soc chip. ++ + endif # PHYLIB + + config MICREL_KS8995MA +--- a/drivers/net/phy/Makefile ++++ b/drivers/net/phy/Makefile +@@ -48,6 +48,7 @@ obj-$(CONFIG_MDIO_CAVIUM) += mdio-cavium + obj-$(CONFIG_MDIO_GPIO) += mdio-gpio.o + obj-$(CONFIG_MDIO_HISI_FEMAC) += mdio-hisi-femac.o + obj-$(CONFIG_MDIO_I2C) += mdio-i2c.o ++obj-$(CONFIG_MDIO_IPQ40XX) += mdio-ipq40xx.o + obj-$(CONFIG_MDIO_MOXART) += mdio-moxart.o + obj-$(CONFIG_MDIO_MSCC_MIIM) += mdio-mscc-miim.o + obj-$(CONFIG_MDIO_OCTEON) += mdio-octeon.o +--- /dev/null ++++ b/drivers/net/phy/mdio-ipq40xx.c +@@ -0,0 +1,196 @@ ++/* ++ * Copyright (c) 2015-2016, The Linux Foundation. All rights reserved. ++ * ++ * Permission to use, copy, modify, and/or distribute this software for ++ * any purpose with or without fee is hereby granted, provided that the ++ * above copyright notice and this permission notice appear in all copies. ++ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES ++ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF ++ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ++ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES ++ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ++ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT ++ * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. ++ */ ++ ++#include <linux/delay.h> ++#include <linux/kernel.h> ++#include <linux/module.h> ++#include <linux/mutex.h> ++#include <linux/io.h> ++#include <linux/of_address.h> ++#include <linux/of_mdio.h> ++#include <linux/phy.h> ++#include <linux/platform_device.h> ++ ++#define MDIO_CTRL_0_REG 0x40 ++#define MDIO_CTRL_1_REG 0x44 ++#define MDIO_CTRL_2_REG 0x48 ++#define MDIO_CTRL_3_REG 0x4c ++#define MDIO_CTRL_4_REG 0x50 ++#define MDIO_CTRL_4_ACCESS_BUSY BIT(16) ++#define MDIO_CTRL_4_ACCESS_START BIT(8) ++#define MDIO_CTRL_4_ACCESS_CODE_READ 0 ++#define MDIO_CTRL_4_ACCESS_CODE_WRITE 1 ++#define CTRL_0_REG_DEFAULT_VALUE 0x150FF ++ ++#define IPQ40XX_MDIO_RETRY 1000 ++#define IPQ40XX_MDIO_DELAY 10 ++ ++struct ipq40xx_mdio_data { ++ struct mii_bus *mii_bus; ++ void __iomem *membase; ++ struct device *dev; ++}; ++ ++static int ipq40xx_mdio_wait_busy(struct ipq40xx_mdio_data *am) ++{ ++ int i; ++ ++ for (i = 0; i < IPQ40XX_MDIO_RETRY; i++) { ++ unsigned int busy; ++ ++ busy = readl(am->membase + MDIO_CTRL_4_REG) & ++ MDIO_CTRL_4_ACCESS_BUSY; ++ if (!busy) ++ return 0; ++ ++ /* BUSY might take to be cleard by 15~20 times of loop */ ++ udelay(IPQ40XX_MDIO_DELAY); ++ } ++ ++ dev_err(am->dev, "%s: MDIO operation timed out\n", am->mii_bus->name); ++ ++ return -ETIMEDOUT; ++} ++ ++static int ipq40xx_mdio_read(struct mii_bus *bus, int mii_id, int regnum) ++{ ++ struct ipq40xx_mdio_data *am = bus->priv; ++ int value = 0; ++ unsigned int cmd = 0; ++ ++ lockdep_assert_held(&bus->mdio_lock); ++ ++ if (ipq40xx_mdio_wait_busy(am)) ++ return -ETIMEDOUT; ++ ++ /* issue the phy address and reg */ ++ writel((mii_id << 8) | regnum, am->membase + MDIO_CTRL_1_REG); ++ ++ cmd = MDIO_CTRL_4_ACCESS_START|MDIO_CTRL_4_ACCESS_CODE_READ; ++ ++ /* issue read command */ ++ writel(cmd, am->membase + MDIO_CTRL_4_REG); ++ ++ /* Wait read complete */ ++ if (ipq40xx_mdio_wait_busy(am)) ++ return -ETIMEDOUT; ++ ++ /* Read data */ ++ value = readl(am->membase + MDIO_CTRL_3_REG); ++ ++ return value; ++} ++ ++static int ipq40xx_mdio_write(struct mii_bus *bus, int mii_id, int regnum, ++ u16 value) ++{ ++ struct ipq40xx_mdio_data *am = bus->priv; ++ unsigned int cmd = 0; ++ ++ lockdep_assert_held(&bus->mdio_lock); ++ ++ if (ipq40xx_mdio_wait_busy(am)) ++ return -ETIMEDOUT; ++ ++ /* issue the phy address and reg */ ++ writel((mii_id << 8) | regnum, am->membase + MDIO_CTRL_1_REG); ++ ++ /* issue write data */ ++ writel(value, am->membase + MDIO_CTRL_2_REG); ++ ++ cmd = MDIO_CTRL_4_ACCESS_START|MDIO_CTRL_4_ACCESS_CODE_WRITE; ++ /* issue write command */ ++ writel(cmd, am->membase + MDIO_CTRL_4_REG); ++ ++ /* Wait write complete */ ++ if (ipq40xx_mdio_wait_busy(am)) ++ return -ETIMEDOUT; ++ ++ return 0; ++} ++ ++static int ipq40xx_mdio_probe(struct platform_device *pdev) ++{ ++ struct ipq40xx_mdio_data *am; ++ struct resource *res; ++ int i; ++ ++ am = devm_kzalloc(&pdev->dev, sizeof(*am), GFP_KERNEL); ++ if (!am) ++ return -ENOMEM; ++ ++ res = platform_get_resource(pdev, IORESOURCE_MEM, 0); ++ if (!res) { ++ dev_err(&pdev->dev, "no iomem resource found\n"); ++ return -ENXIO; ++ } ++ ++ am->membase = devm_ioremap_resource(&pdev->dev, res); ++ if (IS_ERR(am->membase)) { ++ dev_err(&pdev->dev, "unable to ioremap registers\n"); ++ return PTR_ERR(am->membase); ++ } ++ ++ am->mii_bus = devm_mdiobus_alloc(&pdev->dev); ++ if (!am->mii_bus) ++ return -ENOMEM; ++ ++ writel(CTRL_0_REG_DEFAULT_VALUE, am->membase + MDIO_CTRL_0_REG); ++ ++ am->mii_bus->name = "ipq40xx_mdio"; ++ am->mii_bus->read = ipq40xx_mdio_read; ++ am->mii_bus->write = ipq40xx_mdio_write; ++ am->mii_bus->priv = am; ++ am->mii_bus->parent = &pdev->dev; ++ snprintf(am->mii_bus->id, MII_BUS_ID_SIZE, "%s", dev_name(&pdev->dev)); ++ ++ am->dev = &pdev->dev; ++ platform_set_drvdata(pdev, am); ++ ++ return of_mdiobus_register(am->mii_bus, pdev->dev.of_node); ++} ++ ++static int ipq40xx_mdio_remove(struct platform_device *pdev) ++{ ++ struct ipq40xx_mdio_data *am = platform_get_drvdata(pdev); ++ ++ mdiobus_unregister(am->mii_bus); ++ ++ return 0; ++} ++ ++static const struct of_device_id ipq40xx_mdio_dt_ids[] = { ++ { .compatible = "qcom,ipq4019-mdio" }, ++ { } ++}; ++MODULE_DEVICE_TABLE(of, ipq40xx_mdio_dt_ids); ++ ++static struct platform_driver ipq40xx_mdio_driver = { ++ .probe = ipq40xx_mdio_probe, ++ .remove = ipq40xx_mdio_remove, ++ .driver = { ++ .name = "ipq40xx-mdio", ++ .of_match_table = ipq40xx_mdio_dt_ids, ++ }, ++}; ++ ++module_platform_driver(ipq40xx_mdio_driver); ++ ++#define DRV_VERSION "1.0" ++ ++MODULE_DESCRIPTION("IPQ40XX MDIO interface driver"); ++MODULE_AUTHOR("Qualcomm Atheros"); ++MODULE_VERSION(DRV_VERSION); ++MODULE_LICENSE("Dual BSD/GPL"); |