mv88e6xxx-objs += port.o
mv88e6xxx-$(CONFIG_NET_DSA_MV88E6XXX_PTP) += ptp.o
mv88e6xxx-objs += serdes.o
+mv88e6xxx-objs += smi.o
#include "port.h"
#include "ptp.h"
#include "serdes.h"
+#include "smi.h"
static void assert_reg_lock(struct mv88e6xxx_chip *chip)
{
}
}
-/* The switch ADDR[4:1] configuration pins define the chip SMI device address
- * (ADDR[0] is always zero, thus only even SMI addresses can be strapped).
- *
- * When ADDR is all zero, the chip uses Single-chip Addressing Mode, assuming it
- * is the only device connected to the SMI master. In this mode it responds to
- * all 32 possible SMI addresses, and thus maps directly the internal devices.
- *
- * When ADDR is non-zero, the chip uses Multi-chip Addressing Mode, allowing
- * multiple devices to share the SMI interface. In this mode it responds to only
- * 2 registers, used to indirectly access the internal SMI devices.
- */
-
-static int mv88e6xxx_smi_read(struct mv88e6xxx_chip *chip,
- int addr, int reg, u16 *val)
-{
- if (!chip->smi_ops)
- return -EOPNOTSUPP;
-
- return chip->smi_ops->read(chip, addr, reg, val);
-}
-
-static int mv88e6xxx_smi_write(struct mv88e6xxx_chip *chip,
- int addr, int reg, u16 val)
-{
- if (!chip->smi_ops)
- return -EOPNOTSUPP;
-
- return chip->smi_ops->write(chip, addr, reg, val);
-}
-
-static int mv88e6xxx_smi_single_chip_read(struct mv88e6xxx_chip *chip,
- int addr, int reg, u16 *val)
-{
- int ret;
-
- ret = mdiobus_read_nested(chip->bus, addr, reg);
- if (ret < 0)
- return ret;
-
- *val = ret & 0xffff;
-
- return 0;
-}
-
-static int mv88e6xxx_smi_single_chip_write(struct mv88e6xxx_chip *chip,
- int addr, int reg, u16 val)
-{
- int ret;
-
- ret = mdiobus_write_nested(chip->bus, addr, reg, val);
- if (ret < 0)
- return ret;
-
- return 0;
-}
-
-static const struct mv88e6xxx_bus_ops mv88e6xxx_smi_single_chip_ops = {
- .read = mv88e6xxx_smi_single_chip_read,
- .write = mv88e6xxx_smi_single_chip_write,
-};
-
-static int mv88e6xxx_smi_multi_chip_wait(struct mv88e6xxx_chip *chip)
-{
- int ret;
- int i;
-
- for (i = 0; i < 16; i++) {
- ret = mdiobus_read_nested(chip->bus, chip->sw_addr, SMI_CMD);
- if (ret < 0)
- return ret;
-
- if ((ret & SMI_CMD_BUSY) == 0)
- return 0;
- }
-
- return -ETIMEDOUT;
-}
-
-static int mv88e6xxx_smi_multi_chip_read(struct mv88e6xxx_chip *chip,
- int addr, int reg, u16 *val)
-{
- int ret;
-
- /* Wait for the bus to become free. */
- ret = mv88e6xxx_smi_multi_chip_wait(chip);
- if (ret < 0)
- return ret;
-
- /* Transmit the read command. */
- ret = mdiobus_write_nested(chip->bus, chip->sw_addr, SMI_CMD,
- SMI_CMD_OP_22_READ | (addr << 5) | reg);
- if (ret < 0)
- return ret;
-
- /* Wait for the read command to complete. */
- ret = mv88e6xxx_smi_multi_chip_wait(chip);
- if (ret < 0)
- return ret;
-
- /* Read the data. */
- ret = mdiobus_read_nested(chip->bus, chip->sw_addr, SMI_DATA);
- if (ret < 0)
- return ret;
-
- *val = ret & 0xffff;
-
- return 0;
-}
-
-static int mv88e6xxx_smi_multi_chip_write(struct mv88e6xxx_chip *chip,
- int addr, int reg, u16 val)
-{
- int ret;
-
- /* Wait for the bus to become free. */
- ret = mv88e6xxx_smi_multi_chip_wait(chip);
- if (ret < 0)
- return ret;
-
- /* Transmit the data to write. */
- ret = mdiobus_write_nested(chip->bus, chip->sw_addr, SMI_DATA, val);
- if (ret < 0)
- return ret;
-
- /* Transmit the write command. */
- ret = mdiobus_write_nested(chip->bus, chip->sw_addr, SMI_CMD,
- SMI_CMD_OP_22_WRITE | (addr << 5) | reg);
- if (ret < 0)
- return ret;
-
- /* Wait for the write command to complete. */
- ret = mv88e6xxx_smi_multi_chip_wait(chip);
- if (ret < 0)
- return ret;
-
- return 0;
-}
-
-static const struct mv88e6xxx_bus_ops mv88e6xxx_smi_multi_chip_ops = {
- .read = mv88e6xxx_smi_multi_chip_read,
- .write = mv88e6xxx_smi_multi_chip_write,
-};
-
int mv88e6xxx_read(struct mv88e6xxx_chip *chip, int addr, int reg, u16 *val)
{
int err;
return chip;
}
-static int mv88e6xxx_smi_init(struct mv88e6xxx_chip *chip,
- struct mii_bus *bus, int sw_addr)
-{
- if (sw_addr == 0)
- chip->smi_ops = &mv88e6xxx_smi_single_chip_ops;
- else if (chip->info->multi_chip)
- chip->smi_ops = &mv88e6xxx_smi_multi_chip_ops;
- else
- return -EINVAL;
-
- chip->bus = bus;
- chip->sw_addr = sw_addr;
-
- return 0;
-}
-
static enum dsa_tag_protocol mv88e6xxx_get_tag_protocol(struct dsa_switch *ds,
int port)
{
#include <linux/timecounter.h>
#include <net/dsa.h>
-#define SMI_CMD 0x00
-#define SMI_CMD_BUSY BIT(15)
-#define SMI_CMD_CLAUSE_22 BIT(12)
-#define SMI_CMD_OP_22_WRITE ((1 << 10) | SMI_CMD_BUSY | SMI_CMD_CLAUSE_22)
-#define SMI_CMD_OP_22_READ ((2 << 10) | SMI_CMD_BUSY | SMI_CMD_CLAUSE_22)
-#define SMI_CMD_OP_45_WRITE_ADDR ((0 << 10) | SMI_CMD_BUSY)
-#define SMI_CMD_OP_45_WRITE_DATA ((1 << 10) | SMI_CMD_BUSY)
-#define SMI_CMD_OP_45_READ_DATA ((2 << 10) | SMI_CMD_BUSY)
-#define SMI_CMD_OP_45_READ_DATA_INC ((3 << 10) | SMI_CMD_BUSY)
-#define SMI_DATA 0x01
-
#define MV88E6XXX_N_FID 4096
/* PVT limits for 4-bit port and 5-bit switch */
--- /dev/null
+/*
+ * Marvell 88E6xxx System Management Interface (SMI) support
+ *
+ * Copyright (c) 2008 Marvell Semiconductor
+ *
+ * Copyright (c) 2019 Vivien Didelot <vivien.didelot@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include "chip.h"
+#include "smi.h"
+
+/* The switch ADDR[4:1] configuration pins define the chip SMI device address
+ * (ADDR[0] is always zero, thus only even SMI addresses can be strapped).
+ *
+ * When ADDR is all zero, the chip uses Single-chip Addressing Mode, assuming it
+ * is the only device connected to the SMI master. In this mode it responds to
+ * all 32 possible SMI addresses, and thus maps directly the internal devices.
+ *
+ * When ADDR is non-zero, the chip uses Multi-chip Addressing Mode, allowing
+ * multiple devices to share the SMI interface. In this mode it responds to only
+ * 2 registers, used to indirectly access the internal SMI devices.
+ */
+
+static int mv88e6xxx_smi_direct_read(struct mv88e6xxx_chip *chip,
+ int dev, int reg, u16 *data)
+{
+ int ret;
+
+ ret = mdiobus_read_nested(chip->bus, dev, reg);
+ if (ret < 0)
+ return ret;
+
+ *data = ret & 0xffff;
+
+ return 0;
+}
+
+static int mv88e6xxx_smi_direct_write(struct mv88e6xxx_chip *chip,
+ int dev, int reg, u16 data)
+{
+ int ret;
+
+ ret = mdiobus_write_nested(chip->bus, dev, reg, data);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+static int mv88e6xxx_smi_direct_wait(struct mv88e6xxx_chip *chip,
+ int dev, int reg, int bit, int val)
+{
+ u16 data;
+ int err;
+ int i;
+
+ for (i = 0; i < 16; i++) {
+ err = mv88e6xxx_smi_direct_read(chip, dev, reg, &data);
+ if (err)
+ return err;
+
+ if (!!(data >> bit) == !!val)
+ return 0;
+ }
+
+ return -ETIMEDOUT;
+}
+
+static const struct mv88e6xxx_bus_ops mv88e6xxx_smi_direct_ops = {
+ .read = mv88e6xxx_smi_direct_read,
+ .write = mv88e6xxx_smi_direct_write,
+};
+
+/* Offset 0x00: SMI Command Register
+ * Offset 0x01: SMI Data Register
+ */
+
+static int mv88e6xxx_smi_indirect_read(struct mv88e6xxx_chip *chip,
+ int dev, int reg, u16 *data)
+{
+ int err;
+
+ err = mv88e6xxx_smi_direct_wait(chip, chip->sw_addr,
+ MV88E6XXX_SMI_CMD, 15, 0);
+ if (err)
+ return err;
+
+ err = mv88e6xxx_smi_direct_write(chip, chip->sw_addr,
+ MV88E6XXX_SMI_CMD,
+ MV88E6XXX_SMI_CMD_BUSY |
+ MV88E6XXX_SMI_CMD_MODE_22 |
+ MV88E6XXX_SMI_CMD_OP_22_READ |
+ (dev << 5) | reg);
+ if (err)
+ return err;
+
+ err = mv88e6xxx_smi_direct_wait(chip, chip->sw_addr,
+ MV88E6XXX_SMI_CMD, 15, 0);
+ if (err)
+ return err;
+
+ return mv88e6xxx_smi_direct_read(chip, chip->sw_addr,
+ MV88E6XXX_SMI_DATA, data);
+}
+
+static int mv88e6xxx_smi_indirect_write(struct mv88e6xxx_chip *chip,
+ int dev, int reg, u16 data)
+{
+ int err;
+
+ err = mv88e6xxx_smi_direct_wait(chip, chip->sw_addr,
+ MV88E6XXX_SMI_CMD, 15, 0);
+ if (err)
+ return err;
+
+ err = mv88e6xxx_smi_direct_write(chip, chip->sw_addr,
+ MV88E6XXX_SMI_DATA, data);
+ if (err)
+ return err;
+
+ err = mv88e6xxx_smi_direct_write(chip, chip->sw_addr,
+ MV88E6XXX_SMI_CMD,
+ MV88E6XXX_SMI_CMD_BUSY |
+ MV88E6XXX_SMI_CMD_MODE_22 |
+ MV88E6XXX_SMI_CMD_OP_22_WRITE |
+ (dev << 5) | reg);
+ if (err)
+ return err;
+
+ return mv88e6xxx_smi_direct_wait(chip, chip->sw_addr,
+ MV88E6XXX_SMI_CMD, 15, 0);
+}
+
+static const struct mv88e6xxx_bus_ops mv88e6xxx_smi_indirect_ops = {
+ .read = mv88e6xxx_smi_indirect_read,
+ .write = mv88e6xxx_smi_indirect_write,
+};
+
+int mv88e6xxx_smi_init(struct mv88e6xxx_chip *chip,
+ struct mii_bus *bus, int sw_addr)
+{
+ if (sw_addr == 0)
+ chip->smi_ops = &mv88e6xxx_smi_direct_ops;
+ else if (chip->info->multi_chip)
+ chip->smi_ops = &mv88e6xxx_smi_indirect_ops;
+ else
+ return -EINVAL;
+
+ chip->bus = bus;
+ chip->sw_addr = sw_addr;
+
+ return 0;
+}
--- /dev/null
+/*
+ * Marvell 88E6xxx System Management Interface (SMI) support
+ *
+ * Copyright (c) 2008 Marvell Semiconductor
+ *
+ * Copyright (c) 2019 Vivien Didelot <vivien.didelot@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#ifndef _MV88E6XXX_SMI_H
+#define _MV88E6XXX_SMI_H
+
+#include "chip.h"
+
+/* Offset 0x00: SMI Command Register */
+#define MV88E6XXX_SMI_CMD 0x00
+#define MV88E6XXX_SMI_CMD_BUSY 0x8000
+#define MV88E6XXX_SMI_CMD_MODE_MASK 0x1000
+#define MV88E6XXX_SMI_CMD_MODE_45 0x0000
+#define MV88E6XXX_SMI_CMD_MODE_22 0x1000
+#define MV88E6XXX_SMI_CMD_OP_MASK 0x0c00
+#define MV88E6XXX_SMI_CMD_OP_22_WRITE 0x0400
+#define MV88E6XXX_SMI_CMD_OP_22_READ 0x0800
+#define MV88E6XXX_SMI_CMD_OP_45_WRITE_ADDR 0x0000
+#define MV88E6XXX_SMI_CMD_OP_45_WRITE_DATA 0x0400
+#define MV88E6XXX_SMI_CMD_OP_45_READ_DATA 0x0800
+#define MV88E6XXX_SMI_CMD_OP_45_READ_DATA_INC 0x0c00
+#define MV88E6XXX_SMI_CMD_DEV_ADDR_MASK 0x003e
+#define MV88E6XXX_SMI_CMD_REG_ADDR_MASK 0x001f
+
+/* Offset 0x01: SMI Data Register */
+#define MV88E6XXX_SMI_DATA 0x01
+
+int mv88e6xxx_smi_init(struct mv88e6xxx_chip *chip,
+ struct mii_bus *bus, int sw_addr);
+
+static inline int mv88e6xxx_smi_read(struct mv88e6xxx_chip *chip,
+ int dev, int reg, u16 *data)
+{
+ if (chip->smi_ops && chip->smi_ops->read)
+ return chip->smi_ops->read(chip, dev, reg, data);
+
+ return -EOPNOTSUPP;
+}
+
+static inline int mv88e6xxx_smi_write(struct mv88e6xxx_chip *chip,
+ int dev, int reg, u16 data)
+{
+ if (chip->smi_ops && chip->smi_ops->write)
+ return chip->smi_ops->write(chip, dev, reg, data);
+
+ return -EOPNOTSUPP;
+}
+
+#endif /* _MV88E6XXX_SMI_H */
projects / linux.git / commitdiff