diff options
Diffstat (limited to 'drivers/net/ethernet/marvell/mvmdio.c')
| -rw-r--r-- | drivers/net/ethernet/marvell/mvmdio.c | 214 |
1 files changed, 158 insertions, 56 deletions
diff --git a/drivers/net/ethernet/marvell/mvmdio.c b/drivers/net/ethernet/marvell/mvmdio.c index 90a60b98c28e..c9798210fa0f 100644 --- a/drivers/net/ethernet/marvell/mvmdio.c +++ b/drivers/net/ethernet/marvell/mvmdio.c @@ -17,41 +17,52 @@ * warranty of any kind, whether express or implied. */ +#include <linux/clk.h> +#include <linux/delay.h> +#include <linux/interrupt.h> +#include <linux/io.h> #include <linux/kernel.h> #include <linux/module.h> -#include <linux/mutex.h> +#include <linux/of_device.h> +#include <linux/of_mdio.h> #include <linux/phy.h> -#include <linux/interrupt.h> #include <linux/platform_device.h> -#include <linux/delay.h> -#include <linux/io.h> -#include <linux/clk.h> -#include <linux/of_mdio.h> #include <linux/sched.h> #include <linux/wait.h> -#define MVMDIO_SMI_DATA_SHIFT 0 -#define MVMDIO_SMI_PHY_ADDR_SHIFT 16 -#define MVMDIO_SMI_PHY_REG_SHIFT 21 -#define MVMDIO_SMI_READ_OPERATION BIT(26) -#define MVMDIO_SMI_WRITE_OPERATION 0 -#define MVMDIO_SMI_READ_VALID BIT(27) -#define MVMDIO_SMI_BUSY BIT(28) -#define MVMDIO_ERR_INT_CAUSE 0x007C -#define MVMDIO_ERR_INT_SMI_DONE 0x00000010 -#define MVMDIO_ERR_INT_MASK 0x0080 +#define MVMDIO_SMI_DATA_SHIFT 0 +#define MVMDIO_SMI_PHY_ADDR_SHIFT 16 +#define MVMDIO_SMI_PHY_REG_SHIFT 21 +#define MVMDIO_SMI_READ_OPERATION BIT(26) +#define MVMDIO_SMI_WRITE_OPERATION 0 +#define MVMDIO_SMI_READ_VALID BIT(27) +#define MVMDIO_SMI_BUSY BIT(28) +#define MVMDIO_ERR_INT_CAUSE 0x007C +#define MVMDIO_ERR_INT_SMI_DONE 0x00000010 +#define MVMDIO_ERR_INT_MASK 0x0080 + +#define MVMDIO_XSMI_MGNT_REG 0x0 +#define MVMDIO_XSMI_PHYADDR_SHIFT 16 +#define MVMDIO_XSMI_DEVADDR_SHIFT 21 +#define MVMDIO_XSMI_WRITE_OPERATION (0x5 << 26) +#define MVMDIO_XSMI_READ_OPERATION (0x7 << 26) +#define MVMDIO_XSMI_READ_VALID BIT(29) +#define MVMDIO_XSMI_BUSY BIT(30) +#define MVMDIO_XSMI_ADDR_REG 0x8 /* * SMI Timeout measurements: * - Kirkwood 88F6281 (Globalscale Dreamplug): 45us to 95us (Interrupt) * - Armada 370 (Globalscale Mirabox): 41us to 43us (Polled) */ -#define MVMDIO_SMI_TIMEOUT 1000 /* 1000us = 1ms */ -#define MVMDIO_SMI_POLL_INTERVAL_MIN 45 -#define MVMDIO_SMI_POLL_INTERVAL_MAX 55 +#define MVMDIO_SMI_TIMEOUT 1000 /* 1000us = 1ms */ +#define MVMDIO_SMI_POLL_INTERVAL_MIN 45 +#define MVMDIO_SMI_POLL_INTERVAL_MAX 55 + +#define MVMDIO_XSMI_POLL_INTERVAL_MIN 150 +#define MVMDIO_XSMI_POLL_INTERVAL_MAX 160 struct orion_mdio_dev { - struct mutex lock; void __iomem *regs; struct clk *clk[3]; /* @@ -64,14 +75,21 @@ struct orion_mdio_dev { wait_queue_head_t smi_busy_wait; }; -static int orion_mdio_smi_is_done(struct orion_mdio_dev *dev) -{ - return !(readl(dev->regs) & MVMDIO_SMI_BUSY); -} +enum orion_mdio_bus_type { + BUS_TYPE_SMI, + BUS_TYPE_XSMI +}; + +struct orion_mdio_ops { + int (*is_done)(struct orion_mdio_dev *); + unsigned int poll_interval_min; + unsigned int poll_interval_max; +}; /* Wait for the SMI unit to be ready for another operation */ -static int orion_mdio_wait_ready(struct mii_bus *bus) +static int orion_mdio_wait_ready(const struct orion_mdio_ops *ops, + struct mii_bus *bus) { struct orion_mdio_dev *dev = bus->priv; unsigned long timeout = usecs_to_jiffies(MVMDIO_SMI_TIMEOUT); @@ -79,14 +97,14 @@ static int orion_mdio_wait_ready(struct mii_bus *bus) int timedout = 0; while (1) { - if (orion_mdio_smi_is_done(dev)) + if (ops->is_done(dev)) return 0; else if (timedout) break; if (dev->err_interrupt <= 0) { - usleep_range(MVMDIO_SMI_POLL_INTERVAL_MIN, - MVMDIO_SMI_POLL_INTERVAL_MAX); + usleep_range(ops->poll_interval_min, + ops->poll_interval_max); if (time_is_before_jiffies(end)) ++timedout; @@ -98,8 +116,7 @@ static int orion_mdio_wait_ready(struct mii_bus *bus) if (timeout < 2) timeout = 2; wait_event_timeout(dev->smi_busy_wait, - orion_mdio_smi_is_done(dev), - timeout); + ops->is_done(dev), timeout); ++timedout; } @@ -109,52 +126,61 @@ static int orion_mdio_wait_ready(struct mii_bus *bus) return -ETIMEDOUT; } -static int orion_mdio_read(struct mii_bus *bus, int mii_id, - int regnum) +static int orion_mdio_smi_is_done(struct orion_mdio_dev *dev) +{ + return !(readl(dev->regs) & MVMDIO_SMI_BUSY); +} + +static const struct orion_mdio_ops orion_mdio_smi_ops = { + .is_done = orion_mdio_smi_is_done, + .poll_interval_min = MVMDIO_SMI_POLL_INTERVAL_MIN, + .poll_interval_max = MVMDIO_SMI_POLL_INTERVAL_MAX, +}; + +static int orion_mdio_smi_read(struct mii_bus *bus, int mii_id, + int regnum) { struct orion_mdio_dev *dev = bus->priv; u32 val; int ret; - mutex_lock(&dev->lock); + if (regnum & MII_ADDR_C45) + return -EOPNOTSUPP; - ret = orion_mdio_wait_ready(bus); + ret = orion_mdio_wait_ready(&orion_mdio_smi_ops, bus); if (ret < 0) - goto out; + return ret; writel(((mii_id << MVMDIO_SMI_PHY_ADDR_SHIFT) | (regnum << MVMDIO_SMI_PHY_REG_SHIFT) | MVMDIO_SMI_READ_OPERATION), dev->regs); - ret = orion_mdio_wait_ready(bus); + ret = orion_mdio_wait_ready(&orion_mdio_smi_ops, bus); if (ret < 0) - goto out; + return ret; val = readl(dev->regs); if (!(val & MVMDIO_SMI_READ_VALID)) { dev_err(bus->parent, "SMI bus read not valid\n"); - ret = -ENODEV; - goto out; + return -ENODEV; } - ret = val & 0xFFFF; -out: - mutex_unlock(&dev->lock); - return ret; + return val & GENMASK(15, 0); } -static int orion_mdio_write(struct mii_bus *bus, int mii_id, - int regnum, u16 value) +static int orion_mdio_smi_write(struct mii_bus *bus, int mii_id, + int regnum, u16 value) { struct orion_mdio_dev *dev = bus->priv; int ret; - mutex_lock(&dev->lock); + if (regnum & MII_ADDR_C45) + return -EOPNOTSUPP; - ret = orion_mdio_wait_ready(bus); + ret = orion_mdio_wait_ready(&orion_mdio_smi_ops, bus); if (ret < 0) - goto out; + return ret; writel(((mii_id << MVMDIO_SMI_PHY_ADDR_SHIFT) | (regnum << MVMDIO_SMI_PHY_REG_SHIFT) | @@ -162,9 +188,74 @@ static int orion_mdio_write(struct mii_bus *bus, int mii_id, (value << MVMDIO_SMI_DATA_SHIFT)), dev->regs); -out: - mutex_unlock(&dev->lock); - return ret; + return 0; +} + +static int orion_mdio_xsmi_is_done(struct orion_mdio_dev *dev) +{ + return !(readl(dev->regs + MVMDIO_XSMI_MGNT_REG) & MVMDIO_XSMI_BUSY); +} + +static const struct orion_mdio_ops orion_mdio_xsmi_ops = { + .is_done = orion_mdio_xsmi_is_done, + .poll_interval_min = MVMDIO_XSMI_POLL_INTERVAL_MIN, + .poll_interval_max = MVMDIO_XSMI_POLL_INTERVAL_MAX, +}; + +static int orion_mdio_xsmi_read(struct mii_bus *bus, int mii_id, + int regnum) +{ + struct orion_mdio_dev *dev = bus->priv; + u16 dev_addr = (regnum >> 16) & GENMASK(4, 0); + int ret; + + if (!(regnum & MII_ADDR_C45)) + return -EOPNOTSUPP; + + ret = orion_mdio_wait_ready(&orion_mdio_xsmi_ops, bus); + if (ret < 0) + return ret; + + writel(regnum & GENMASK(15, 0), dev->regs + MVMDIO_XSMI_ADDR_REG); + writel((mii_id << MVMDIO_XSMI_PHYADDR_SHIFT) | + (dev_addr << MVMDIO_XSMI_DEVADDR_SHIFT) | + MVMDIO_XSMI_READ_OPERATION, + dev->regs + MVMDIO_XSMI_MGNT_REG); + + ret = orion_mdio_wait_ready(&orion_mdio_xsmi_ops, bus); + if (ret < 0) + return ret; + + if (!(readl(dev->regs + MVMDIO_XSMI_MGNT_REG) & + MVMDIO_XSMI_READ_VALID)) { + dev_err(bus->parent, "XSMI bus read not valid\n"); + return -ENODEV; + } + + return readl(dev->regs + MVMDIO_XSMI_MGNT_REG) & GENMASK(15, 0); +} + +static int orion_mdio_xsmi_write(struct mii_bus *bus, int mii_id, + int regnum, u16 value) +{ + struct orion_mdio_dev *dev = bus->priv; + u16 dev_addr = (regnum >> 16) & GENMASK(4, 0); + int ret; + + if (!(regnum & MII_ADDR_C45)) + return -EOPNOTSUPP; + + ret = orion_mdio_wait_ready(&orion_mdio_xsmi_ops, bus); + if (ret < 0) + return ret; + + writel(regnum & GENMASK(15, 0), dev->regs + MVMDIO_XSMI_ADDR_REG); + writel((mii_id << MVMDIO_XSMI_PHYADDR_SHIFT) | + (dev_addr << MVMDIO_XSMI_DEVADDR_SHIFT) | + MVMDIO_XSMI_WRITE_OPERATION | value, + dev->regs + MVMDIO_XSMI_MGNT_REG); + + return 0; } static irqreturn_t orion_mdio_err_irq(int irq, void *dev_id) @@ -184,11 +275,14 @@ static irqreturn_t orion_mdio_err_irq(int irq, void *dev_id) static int orion_mdio_probe(struct platform_device *pdev) { + enum orion_mdio_bus_type type; struct resource *r; struct mii_bus *bus; struct orion_mdio_dev *dev; int i, ret; + type = (enum orion_mdio_bus_type)of_device_get_match_data(&pdev->dev); + r = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!r) { dev_err(&pdev->dev, "No SMI register address given\n"); @@ -200,9 +294,18 @@ static int orion_mdio_probe(struct platform_device *pdev) if (!bus) return -ENOMEM; + switch (type) { + case BUS_TYPE_SMI: + bus->read = orion_mdio_smi_read; + bus->write = orion_mdio_smi_write; + break; + case BUS_TYPE_XSMI: + bus->read = orion_mdio_xsmi_read; + bus->write = orion_mdio_xsmi_write; + break; + } + bus->name = "orion_mdio_bus"; - bus->read = orion_mdio_read; - bus->write = orion_mdio_write; snprintf(bus->id, MII_BUS_ID_SIZE, "%s-mii", dev_name(&pdev->dev)); bus->parent = &pdev->dev; @@ -244,8 +347,6 @@ static int orion_mdio_probe(struct platform_device *pdev) return -EPROBE_DEFER; } - mutex_init(&dev->lock); - if (pdev->dev.of_node) ret = of_mdiobus_register(bus, pdev->dev.of_node); else @@ -294,7 +395,8 @@ static int orion_mdio_remove(struct platform_device *pdev) } static const struct of_device_id orion_mdio_match[] = { - { .compatible = "marvell,orion-mdio" }, + { .compatible = "marvell,orion-mdio", .data = (void *)BUS_TYPE_SMI }, + { .compatible = "marvell,xmdio", .data = (void *)BUS_TYPE_XSMI }, { } }; MODULE_DEVICE_TABLE(of, orion_mdio_match); |
