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Diffstat (limited to 'drivers/net/ethernet/freescale/fsl_pq_mdio.c')
-rw-r--r--drivers/net/ethernet/freescale/fsl_pq_mdio.c549
1 files changed, 292 insertions, 257 deletions
diff --git a/drivers/net/ethernet/freescale/fsl_pq_mdio.c b/drivers/net/ethernet/freescale/fsl_pq_mdio.c
index 9527b28d70d1..c93a05654b46 100644
--- a/drivers/net/ethernet/freescale/fsl_pq_mdio.c
+++ b/drivers/net/ethernet/freescale/fsl_pq_mdio.c
@@ -19,54 +19,90 @@
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/errno.h>
-#include <linux/unistd.h>
#include <linux/slab.h>
-#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/delay.h>
-#include <linux/netdevice.h>
-#include <linux/etherdevice.h>
-#include <linux/skbuff.h>
-#include <linux/spinlock.h>
-#include <linux/mm.h>
#include <linux/module.h>
-#include <linux/platform_device.h>
-#include <linux/crc32.h>
#include <linux/mii.h>
-#include <linux/phy.h>
-#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_mdio.h>
-#include <linux/of_platform.h>
+#include <linux/of_device.h>
#include <asm/io.h>
-#include <asm/irq.h>
-#include <asm/uaccess.h>
-#include <asm/ucc.h>
+#include <asm/ucc.h> /* for ucc_set_qe_mux_mii_mng() */
#include "gianfar.h"
-#include "fsl_pq_mdio.h"
+
+#define MIIMIND_BUSY 0x00000001
+#define MIIMIND_NOTVALID 0x00000004
+#define MIIMCFG_INIT_VALUE 0x00000007
+#define MIIMCFG_RESET 0x80000000
+
+#define MII_READ_COMMAND 0x00000001
+
+struct fsl_pq_mii {
+ u32 miimcfg; /* MII management configuration reg */
+ u32 miimcom; /* MII management command reg */
+ u32 miimadd; /* MII management address reg */
+ u32 miimcon; /* MII management control reg */
+ u32 miimstat; /* MII management status reg */
+ u32 miimind; /* MII management indication reg */
+};
+
+struct fsl_pq_mdio {
+ u8 res1[16];
+ u32 ieventm; /* MDIO Interrupt event register (for etsec2)*/
+ u32 imaskm; /* MDIO Interrupt mask register (for etsec2)*/
+ u8 res2[4];
+ u32 emapm; /* MDIO Event mapping register (for etsec2)*/
+ u8 res3[1280];
+ struct fsl_pq_mii mii;
+ u8 res4[28];
+ u32 utbipar; /* TBI phy address reg (only on UCC) */
+ u8 res5[2728];
+} __packed;
/* Number of microseconds to wait for an MII register to respond */
#define MII_TIMEOUT 1000
struct fsl_pq_mdio_priv {
void __iomem *map;
- struct fsl_pq_mdio __iomem *regs;
+ struct fsl_pq_mii __iomem *regs;
+ int irqs[PHY_MAX_ADDR];
+};
+
+/*
+ * Per-device-type data. Each type of device tree node that we support gets
+ * one of these.
+ *
+ * @mii_offset: the offset of the MII registers within the memory map of the
+ * node. Some nodes define only the MII registers, and some define the whole
+ * MAC (which includes the MII registers).
+ *
+ * @get_tbipa: determines the address of the TBIPA register
+ *
+ * @ucc_configure: a special function for extra QE configuration
+ */
+struct fsl_pq_mdio_data {
+ unsigned int mii_offset; /* offset of the MII registers */
+ uint32_t __iomem * (*get_tbipa)(void __iomem *p);
+ void (*ucc_configure)(phys_addr_t start, phys_addr_t end);
};
/*
- * Write value to the PHY at mii_id at register regnum,
- * on the bus attached to the local interface, which may be different from the
- * generic mdio bus (tied to a single interface), waiting until the write is
- * done before returning. This is helpful in programming interfaces like
- * the TBI which control interfaces like onchip SERDES and are always tied to
- * the local mdio pins, which may not be the same as system mdio bus, used for
+ * Write value to the PHY at mii_id at register regnum, on the bus attached
+ * to the local interface, which may be different from the generic mdio bus
+ * (tied to a single interface), waiting until the write is done before
+ * returning. This is helpful in programming interfaces like the TBI which
+ * control interfaces like onchip SERDES and are always tied to the local
+ * mdio pins, which may not be the same as system mdio bus, used for
* controlling the external PHYs, for example.
*/
-int fsl_pq_local_mdio_write(struct fsl_pq_mdio __iomem *regs, int mii_id,
- int regnum, u16 value)
+static int fsl_pq_mdio_write(struct mii_bus *bus, int mii_id, int regnum,
+ u16 value)
{
+ struct fsl_pq_mdio_priv *priv = bus->priv;
+ struct fsl_pq_mii __iomem *regs = priv->regs;
u32 status;
/* Set the PHY address and the register address we want to write */
@@ -83,20 +119,21 @@ int fsl_pq_local_mdio_write(struct fsl_pq_mdio __iomem *regs, int mii_id,
}
/*
- * Read the bus for PHY at addr mii_id, register regnum, and
- * return the value. Clears miimcom first. All PHY operation
- * done on the bus attached to the local interface,
- * which may be different from the generic mdio bus
- * This is helpful in programming interfaces like
- * the TBI which, in turn, control interfaces like onchip SERDES
- * and are always tied to the local mdio pins, which may not be the
+ * Read the bus for PHY at addr mii_id, register regnum, and return the value.
+ * Clears miimcom first.
+ *
+ * All PHY operation done on the bus attached to the local interface, which
+ * may be different from the generic mdio bus. This is helpful in programming
+ * interfaces like the TBI which, in turn, control interfaces like on-chip
+ * SERDES and are always tied to the local mdio pins, which may not be the
* same as system mdio bus, used for controlling the external PHYs, for eg.
*/
-int fsl_pq_local_mdio_read(struct fsl_pq_mdio __iomem *regs,
- int mii_id, int regnum)
+static int fsl_pq_mdio_read(struct mii_bus *bus, int mii_id, int regnum)
{
- u16 value;
+ struct fsl_pq_mdio_priv *priv = bus->priv;
+ struct fsl_pq_mii __iomem *regs = priv->regs;
u32 status;
+ u16 value;
/* Set the PHY address and the register address we want to read */
out_be32(&regs->miimadd, (mii_id << 8) | regnum);
@@ -115,44 +152,15 @@ int fsl_pq_local_mdio_read(struct fsl_pq_mdio __iomem *regs,
/* Grab the value of the register from miimstat */
value = in_be32(&regs->miimstat);
+ dev_dbg(&bus->dev, "read %04x from address %x/%x\n", value, mii_id, regnum);
return value;
}
-static struct fsl_pq_mdio __iomem *fsl_pq_mdio_get_regs(struct mii_bus *bus)
-{
- struct fsl_pq_mdio_priv *priv = bus->priv;
-
- return priv->regs;
-}
-
-/*
- * Write value to the PHY at mii_id at register regnum,
- * on the bus, waiting until the write is done before returning.
- */
-int fsl_pq_mdio_write(struct mii_bus *bus, int mii_id, int regnum, u16 value)
-{
- struct fsl_pq_mdio __iomem *regs = fsl_pq_mdio_get_regs(bus);
-
- /* Write to the local MII regs */
- return fsl_pq_local_mdio_write(regs, mii_id, regnum, value);
-}
-
-/*
- * Read the bus for PHY at addr mii_id, register regnum, and
- * return the value. Clears miimcom first.
- */
-int fsl_pq_mdio_read(struct mii_bus *bus, int mii_id, int regnum)
-{
- struct fsl_pq_mdio __iomem *regs = fsl_pq_mdio_get_regs(bus);
-
- /* Read the local MII regs */
- return fsl_pq_local_mdio_read(regs, mii_id, regnum);
-}
-
/* Reset the MIIM registers, and wait for the bus to free */
static int fsl_pq_mdio_reset(struct mii_bus *bus)
{
- struct fsl_pq_mdio __iomem *regs = fsl_pq_mdio_get_regs(bus);
+ struct fsl_pq_mdio_priv *priv = bus->priv;
+ struct fsl_pq_mii __iomem *regs = priv->regs;
u32 status;
mutex_lock(&bus->mdio_lock);
@@ -170,234 +178,291 @@ static int fsl_pq_mdio_reset(struct mii_bus *bus)
mutex_unlock(&bus->mdio_lock);
if (!status) {
- printk(KERN_ERR "%s: The MII Bus is stuck!\n",
- bus->name);
+ dev_err(&bus->dev, "timeout waiting for MII bus\n");
return -EBUSY;
}
return 0;
}
-void fsl_pq_mdio_bus_name(char *name, struct device_node *np)
+#if defined(CONFIG_GIANFAR) || defined(CONFIG_GIANFAR_MODULE)
+/*
+ * This is mildly evil, but so is our hardware for doing this.
+ * Also, we have to cast back to struct gfar because of
+ * definition weirdness done in gianfar.h.
+ */
+static uint32_t __iomem *get_gfar_tbipa(void __iomem *p)
{
- const u32 *addr;
- u64 taddr = OF_BAD_ADDR;
-
- addr = of_get_address(np, 0, NULL, NULL);
- if (addr)
- taddr = of_translate_address(np, addr);
+ struct gfar __iomem *enet_regs = p;
- snprintf(name, MII_BUS_ID_SIZE, "%s@%llx", np->name,
- (unsigned long long)taddr);
+ return &enet_regs->tbipa;
}
-EXPORT_SYMBOL_GPL(fsl_pq_mdio_bus_name);
+/*
+ * Return the TBIPAR address for an eTSEC2 node
+ */
+static uint32_t __iomem *get_etsec_tbipa(void __iomem *p)
+{
+ return p;
+}
+#endif
-static u32 __iomem *get_gfar_tbipa(struct fsl_pq_mdio __iomem *regs, struct device_node *np)
+#if defined(CONFIG_UCC_GETH) || defined(CONFIG_UCC_GETH_MODULE)
+/*
+ * Return the TBIPAR address for a QE MDIO node
+ */
+static uint32_t __iomem *get_ucc_tbipa(void __iomem *p)
{
-#if defined(CONFIG_GIANFAR) || defined(CONFIG_GIANFAR_MODULE)
- struct gfar __iomem *enet_regs;
+ struct fsl_pq_mdio __iomem *mdio = p;
- /*
- * This is mildly evil, but so is our hardware for doing this.
- * Also, we have to cast back to struct gfar because of
- * definition weirdness done in gianfar.h.
- */
- if(of_device_is_compatible(np, "fsl,gianfar-mdio") ||
- of_device_is_compatible(np, "fsl,gianfar-tbi") ||
- of_device_is_compatible(np, "gianfar")) {
- enet_regs = (struct gfar __iomem *)regs;
- return &enet_regs->tbipa;
- } else if (of_device_is_compatible(np, "fsl,etsec2-mdio") ||
- of_device_is_compatible(np, "fsl,etsec2-tbi")) {
- return of_iomap(np, 1);
- }
-#endif
- return NULL;
+ return &mdio->utbipar;
}
-
-static int get_ucc_id_for_range(u64 start, u64 end, u32 *ucc_id)
+/*
+ * Find the UCC node that controls the given MDIO node
+ *
+ * For some reason, the QE MDIO nodes are not children of the UCC devices
+ * that control them. Therefore, we need to scan all UCC nodes looking for
+ * the one that encompases the given MDIO node. We do this by comparing
+ * physical addresses. The 'start' and 'end' addresses of the MDIO node are
+ * passed, and the correct UCC node will cover the entire address range.
+ *
+ * This assumes that there is only one QE MDIO node in the entire device tree.
+ */
+static void ucc_configure(phys_addr_t start, phys_addr_t end)
{
-#if defined(CONFIG_UCC_GETH) || defined(CONFIG_UCC_GETH_MODULE)
+ static bool found_mii_master;
struct device_node *np = NULL;
- int err = 0;
- for_each_compatible_node(np, NULL, "ucc_geth") {
- struct resource tempres;
+ if (found_mii_master)
+ return;
- err = of_address_to_resource(np, 0, &tempres);
- if (err)
+ for_each_compatible_node(np, NULL, "ucc_geth") {
+ struct resource res;
+ const uint32_t *iprop;
+ uint32_t id;
+ int ret;
+
+ ret = of_address_to_resource(np, 0, &res);
+ if (ret < 0) {
+ pr_debug("fsl-pq-mdio: no address range in node %s\n",
+ np->full_name);
continue;
+ }
/* if our mdio regs fall within this UCC regs range */
- if ((start >= tempres.start) && (end <= tempres.end)) {
- /* Find the id of the UCC */
- const u32 *id;
-
- id = of_get_property(np, "cell-index", NULL);
- if (!id) {
- id = of_get_property(np, "device-id", NULL);
- if (!id)
- continue;
+ if ((start < res.start) || (end > res.end))
+ continue;
+
+ iprop = of_get_property(np, "cell-index", NULL);
+ if (!iprop) {
+ iprop = of_get_property(np, "device-id", NULL);
+ if (!iprop) {
+ pr_debug("fsl-pq-mdio: no UCC ID in node %s\n",
+ np->full_name);
+ continue;
}
+ }
- *ucc_id = *id;
+ id = be32_to_cpup(iprop);
- return 0;
+ /*
+ * cell-index and device-id for QE nodes are
+ * numbered from 1, not 0.
+ */
+ if (ucc_set_qe_mux_mii_mng(id - 1) < 0) {
+ pr_debug("fsl-pq-mdio: invalid UCC ID in node %s\n",
+ np->full_name);
+ continue;
}
+
+ pr_debug("fsl-pq-mdio: setting node UCC%u to MII master\n", id);
+ found_mii_master = true;
}
+}
- if (err)
- return err;
- else
- return -EINVAL;
-#else
- return -ENODEV;
#endif
-}
-static int fsl_pq_mdio_probe(struct platform_device *ofdev)
+static struct of_device_id fsl_pq_mdio_match[] = {
+#if defined(CONFIG_GIANFAR) || defined(CONFIG_GIANFAR_MODULE)
+ {
+ .compatible = "fsl,gianfar-tbi",
+ .data = &(struct fsl_pq_mdio_data) {
+ .mii_offset = 0,
+ .get_tbipa = get_gfar_tbipa,
+ },
+ },
+ {
+ .compatible = "fsl,gianfar-mdio",
+ .data = &(struct fsl_pq_mdio_data) {
+ .mii_offset = 0,
+ .get_tbipa = get_gfar_tbipa,
+ },
+ },
+ {
+ .type = "mdio",
+ .compatible = "gianfar",
+ .data = &(struct fsl_pq_mdio_data) {
+ .mii_offset = offsetof(struct fsl_pq_mdio, mii),
+ .get_tbipa = get_gfar_tbipa,
+ },
+ },
+ {
+ .compatible = "fsl,etsec2-tbi",
+ .data = &(struct fsl_pq_mdio_data) {
+ .mii_offset = offsetof(struct fsl_pq_mdio, mii),
+ .get_tbipa = get_etsec_tbipa,
+ },
+ },
+ {
+ .compatible = "fsl,etsec2-mdio",
+ .data = &(struct fsl_pq_mdio_data) {
+ .mii_offset = offsetof(struct fsl_pq_mdio, mii),
+ .get_tbipa = get_etsec_tbipa,
+ },
+ },
+#endif
+#if defined(CONFIG_UCC_GETH) || defined(CONFIG_UCC_GETH_MODULE)
+ {
+ .compatible = "fsl,ucc-mdio",
+ .data = &(struct fsl_pq_mdio_data) {
+ .mii_offset = 0,
+ .get_tbipa = get_ucc_tbipa,
+ .ucc_configure = ucc_configure,
+ },
+ },
+ {
+ /* Legacy UCC MDIO node */
+ .type = "mdio",
+ .compatible = "ucc_geth_phy",
+ .data = &(struct fsl_pq_mdio_data) {
+ .mii_offset = 0,
+ .get_tbipa = get_ucc_tbipa,
+ .ucc_configure = ucc_configure,
+ },
+ },
+#endif
+ /* No Kconfig option for Fman support yet */
+ {
+ .compatible = "fsl,fman-mdio",
+ .data = &(struct fsl_pq_mdio_data) {
+ .mii_offset = 0,
+ /* Fman TBI operations are handled elsewhere */
+ },
+ },
+
+ {},
+};
+MODULE_DEVICE_TABLE(of, fsl_pq_mdio_match);
+
+static int fsl_pq_mdio_probe(struct platform_device *pdev)
{
- struct device_node *np = ofdev->dev.of_node;
+ const struct of_device_id *id =
+ of_match_device(fsl_pq_mdio_match, &pdev->dev);
+ const struct fsl_pq_mdio_data *data = id->data;
+ struct device_node *np = pdev->dev.of_node;
+ struct resource res;
struct device_node *tbi;
struct fsl_pq_mdio_priv *priv;
- struct fsl_pq_mdio __iomem *regs = NULL;
- void __iomem *map;
- u32 __iomem *tbipa;
struct mii_bus *new_bus;
- int tbiaddr = -1;
- const u32 *addrp;
- u64 addr = 0, size = 0;
int err;
- priv = kzalloc(sizeof(*priv), GFP_KERNEL);
- if (!priv)
- return -ENOMEM;
+ dev_dbg(&pdev->dev, "found %s compatible node\n", id->compatible);
- new_bus = mdiobus_alloc();
- if (!new_bus) {
- err = -ENOMEM;
- goto err_free_priv;
- }
+ new_bus = mdiobus_alloc_size(sizeof(*priv));
+ if (!new_bus)
+ return -ENOMEM;
+ priv = new_bus->priv;
new_bus->name = "Freescale PowerQUICC MII Bus",
- new_bus->read = &fsl_pq_mdio_read,
- new_bus->write = &fsl_pq_mdio_write,
- new_bus->reset = &fsl_pq_mdio_reset,
- new_bus->priv = priv;
- fsl_pq_mdio_bus_name(new_bus->id, np);
-
- addrp = of_get_address(np, 0, &size, NULL);
- if (!addrp) {
- err = -EINVAL;
- goto err_free_bus;
+ new_bus->read = &fsl_pq_mdio_read;
+ new_bus->write = &fsl_pq_mdio_write;
+ new_bus->reset = &fsl_pq_mdio_reset;
+ new_bus->irq = priv->irqs;
+
+ err = of_address_to_resource(np, 0, &res);
+ if (err < 0) {
+ dev_err(&pdev->dev, "could not obtain address information\n");
+ goto error;
}
- /* Set the PHY base address */
- addr = of_translate_address(np, addrp);
- if (addr == OF_BAD_ADDR) {
- err = -EINVAL;
- goto err_free_bus;
- }
+ snprintf(new_bus->id, MII_BUS_ID_SIZE, "%s@%llx", np->name,
+ (unsigned long long)res.start);
- map = ioremap(addr, size);
- if (!map) {
+ priv->map = of_iomap(np, 0);
+ if (!priv->map) {
err = -ENOMEM;
- goto err_free_bus;
+ goto error;
}
- priv->map = map;
-
- if (of_device_is_compatible(np, "fsl,gianfar-mdio") ||
- of_device_is_compatible(np, "fsl,gianfar-tbi") ||
- of_device_is_compatible(np, "fsl,ucc-mdio") ||
- of_device_is_compatible(np, "ucc_geth_phy"))
- map -= offsetof(struct fsl_pq_mdio, miimcfg);
- regs = map;
- priv->regs = regs;
-
- new_bus->irq = kcalloc(PHY_MAX_ADDR, sizeof(int), GFP_KERNEL);
- if (NULL == new_bus->irq) {
- err = -ENOMEM;
- goto err_unmap_regs;
+ /*
+ * Some device tree nodes represent only the MII registers, and
+ * others represent the MAC and MII registers. The 'mii_offset' field
+ * contains the offset of the MII registers inside the mapped register
+ * space.
+ */
+ if (data->mii_offset > resource_size(&res)) {
+ dev_err(&pdev->dev, "invalid register map\n");
+ err = -EINVAL;
+ goto error;
}
+ priv->regs = priv->map + data->mii_offset;
- new_bus->parent = &ofdev->dev;
- dev_set_drvdata(&ofdev->dev, new_bus);
-
- if (of_device_is_compatible(np, "fsl,gianfar-mdio") ||
- of_device_is_compatible(np, "fsl,gianfar-tbi") ||
- of_device_is_compatible(np, "fsl,etsec2-mdio") ||
- of_device_is_compatible(np, "fsl,etsec2-tbi") ||
- of_device_is_compatible(np, "gianfar")) {
- tbipa = get_gfar_tbipa(regs, np);
- if (!tbipa) {
- err = -EINVAL;
- goto err_free_irqs;
- }
- } else if (of_device_is_compatible(np, "fsl,ucc-mdio") ||
- of_device_is_compatible(np, "ucc_geth_phy")) {
- u32 id;
- static u32 mii_mng_master;
-
- tbipa = &regs->utbipar;
-
- if ((err = get_ucc_id_for_range(addr, addr + size, &id)))
- goto err_free_irqs;
+ new_bus->parent = &pdev->dev;
+ dev_set_drvdata(&pdev->dev, new_bus);
- if (!mii_mng_master) {
- mii_mng_master = id;
- ucc_set_qe_mux_mii_mng(id - 1);
+ if (data->get_tbipa) {
+ for_each_child_of_node(np, tbi) {
+ if (strcmp(tbi->type, "tbi-phy") == 0) {
+ dev_dbg(&pdev->dev, "found TBI PHY node %s\n",
+ strrchr(tbi->full_name, '/') + 1);
+ break;
+ }
}
- } else {
- err = -ENODEV;
- goto err_free_irqs;
- }
- for_each_child_of_node(np, tbi) {
- if (!strncmp(tbi->type, "tbi-phy", 8))
- break;
- }
+ if (tbi) {
+ const u32 *prop = of_get_property(tbi, "reg", NULL);
+ uint32_t __iomem *tbipa;
- if (tbi) {
- const u32 *prop = of_get_property(tbi, "reg", NULL);
+ if (!prop) {
+ dev_err(&pdev->dev,
+ "missing 'reg' property in node %s\n",
+ tbi->full_name);
+ err = -EBUSY;
+ goto error;
+ }
- if (prop)
- tbiaddr = *prop;
+ tbipa = data->get_tbipa(priv->map);
- if (tbiaddr == -1) {
- err = -EBUSY;
- goto err_free_irqs;
- } else {
- out_be32(tbipa, tbiaddr);
+ out_be32(tbipa, be32_to_cpup(prop));
}
}
+ if (data->ucc_configure)
+ data->ucc_configure(res.start, res.end);
+
err = of_mdiobus_register(new_bus, np);
if (err) {
- printk (KERN_ERR "%s: Cannot register as MDIO bus\n",
- new_bus->name);
- goto err_free_irqs;
+ dev_err(&pdev->dev, "cannot register %s as MDIO bus\n",
+ new_bus->name);
+ goto error;
}
return 0;
-err_free_irqs:
- kfree(new_bus->irq);
-err_unmap_regs:
- iounmap(priv->map);
-err_free_bus:
+error:
+ if (priv->map)
+ iounmap(priv->map);
+
kfree(new_bus);
-err_free_priv:
- kfree(priv);
+
return err;
}
-static int fsl_pq_mdio_remove(struct platform_device *ofdev)
+static int fsl_pq_mdio_remove(struct platform_device *pdev)
{
- struct device *device = &ofdev->dev;
+ struct device *device = &pdev->dev;
struct mii_bus *bus = dev_get_drvdata(device);
struct fsl_pq_mdio_priv *priv = bus->priv;
@@ -406,41 +471,11 @@ static int fsl_pq_mdio_remove(struct platform_device *ofdev)
dev_set_drvdata(device, NULL);
iounmap(priv->map);
- bus->priv = NULL;
mdiobus_free(bus);
- kfree(priv);
return 0;
}
-static struct of_device_id fsl_pq_mdio_match[] = {
- {
- .type = "mdio",
- .compatible = "ucc_geth_phy",
- },
- {
- .type = "mdio",
- .compatible = "gianfar",
- },
- {
- .compatible = "fsl,ucc-mdio",
- },
- {
- .compatible = "fsl,gianfar-tbi",
- },
- {
- .compatible = "fsl,gianfar-mdio",
- },
- {
- .compatible = "fsl,etsec2-tbi",
- },
- {
- .compatible = "fsl,etsec2-mdio",
- },
- {},
-};
-MODULE_DEVICE_TABLE(of, fsl_pq_mdio_match);
-
static struct platform_driver fsl_pq_mdio_driver = {
.driver = {
.name = "fsl-pq_mdio",