--- /dev/null
+/*
+ * arch/x86/platform/mellanox/mlx-platform.c
+ * Copyright (c) 2016 Mellanox Technologies. All rights reserved.
+ * Copyright (c) 2016 Vadim Pasternak <vadimp@mellanox.com>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the names of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <linux/device.h>
+#include <linux/dmi.h>
+#include <linux/i2c.h>
+#include <linux/i2c-mux.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/platform_data/i2c-mux-reg.h>
+
+#define MLX_PLAT_DEVICE_NAME "mlxplat"
+
+/* LPC bus IO offsets */
+#define MLXPLAT_CPLD_LPC_I2C_BASE_ADRR 0x2000
+#define MLXPLAT_CPLD_LPC_REG_BASE_ADRR 0x2500
+#define MLXPLAT_CPLD_LPC_IO_RANGE 0x100
+#define MLXPLAT_CPLD_LPC_I2C_CH1_OFF 0xdb
+#define MLXPLAT_CPLD_LPC_I2C_CH2_OFF 0xda
+#define MLXPLAT_CPLD_LPC_PIO_OFFSET 0x10000UL
+#define MLXPLAT_CPLD_LPC_REG1 ((MLXPLAT_CPLD_LPC_REG_BASE_ADRR + \
+ MLXPLAT_CPLD_LPC_I2C_CH1_OFF) | \
+ MLXPLAT_CPLD_LPC_PIO_OFFSET)
+#define MLXPLAT_CPLD_LPC_REG2 ((MLXPLAT_CPLD_LPC_REG_BASE_ADRR + \
+ MLXPLAT_CPLD_LPC_I2C_CH2_OFF) | \
+ MLXPLAT_CPLD_LPC_PIO_OFFSET)
+
+/* Start channel numbers */
+#define MLXPLAT_CPLD_CH1 2
+#define MLXPLAT_CPLD_CH2 10
+
+/* Number of LPC attached MUX platform devices */
+#define MLXPLAT_CPLD_LPC_MUX_DEVS 2
+
+/* mlxplat_priv - platform private data
+ * @pdev_i2c - i2c controller platform device
+ * @pdev_mux - array of mux platform devices
+ */
+struct mlxplat_priv {
+ struct platform_device *pdev_i2c;
+ struct platform_device *pdev_mux[MLXPLAT_CPLD_LPC_MUX_DEVS];
+};
+
+/* Regions for LPC I2C controller and LPC base register space */
+static const struct resource mlxplat_lpc_resources[] = {
+ [0] = DEFINE_RES_NAMED(MLXPLAT_CPLD_LPC_I2C_BASE_ADRR,
+ MLXPLAT_CPLD_LPC_IO_RANGE,
+ "mlxplat_cpld_lpc_i2c_ctrl", IORESOURCE_IO),
+ [1] = DEFINE_RES_NAMED(MLXPLAT_CPLD_LPC_REG_BASE_ADRR,
+ MLXPLAT_CPLD_LPC_IO_RANGE,
+ "mlxplat_cpld_lpc_regs",
+ IORESOURCE_IO),
+};
+
+/* Platform default channels */
+static const int mlxplat_default_channels[][8] = {
+ {
+ MLXPLAT_CPLD_CH1, MLXPLAT_CPLD_CH1 + 1, MLXPLAT_CPLD_CH1 + 2,
+ MLXPLAT_CPLD_CH1 + 3, MLXPLAT_CPLD_CH1 + 4, MLXPLAT_CPLD_CH1 +
+ 5, MLXPLAT_CPLD_CH1 + 6, MLXPLAT_CPLD_CH1 + 7
+ },
+ {
+ MLXPLAT_CPLD_CH2, MLXPLAT_CPLD_CH2 + 1, MLXPLAT_CPLD_CH2 + 2,
+ MLXPLAT_CPLD_CH2 + 3, MLXPLAT_CPLD_CH2 + 4, MLXPLAT_CPLD_CH2 +
+ 5, MLXPLAT_CPLD_CH2 + 6, MLXPLAT_CPLD_CH2 + 7
+ },
+};
+
+/* Platform channels for MSN21xx system family */
+static const int mlxplat_msn21xx_channels[] = { 1, 2, 3, 4, 5, 6, 7, 8 };
+
+/* Platform mux data */
+static struct i2c_mux_reg_platform_data mlxplat_mux_data[] = {
+ {
+ .parent = 1,
+ .base_nr = MLXPLAT_CPLD_CH1,
+ .write_only = 1,
+ .reg = (void __iomem *)MLXPLAT_CPLD_LPC_REG1,
+ .reg_size = 1,
+ .idle_in_use = 1,
+ },
+ {
+ .parent = 1,
+ .base_nr = MLXPLAT_CPLD_CH2,
+ .write_only = 1,
+ .reg = (void __iomem *)MLXPLAT_CPLD_LPC_REG2,
+ .reg_size = 1,
+ .idle_in_use = 1,
+ },
+
+};
+
+static struct platform_device *mlxplat_dev;
+
+static int __init mlxplat_dmi_default_matched(const struct dmi_system_id *dmi)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(mlxplat_mux_data); i++) {
+ mlxplat_mux_data[i].values = mlxplat_default_channels[i];
+ mlxplat_mux_data[i].n_values =
+ ARRAY_SIZE(mlxplat_default_channels[i]);
+ }
+
+ return 1;
+};
+
+static int __init mlxplat_dmi_msn21xx_matched(const struct dmi_system_id *dmi)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(mlxplat_mux_data); i++) {
+ mlxplat_mux_data[i].values = mlxplat_msn21xx_channels;
+ mlxplat_mux_data[i].n_values =
+ ARRAY_SIZE(mlxplat_msn21xx_channels);
+ }
+
+ return 1;
+};
+
+static struct dmi_system_id mlxplat_dmi_table[] __initdata = {
+ {
+ .callback = mlxplat_dmi_default_matched,
+ .matches = {
+ DMI_MATCH(DMI_BOARD_VENDOR, "Mellanox Technologies"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "MSN24"),
+ },
+ },
+ {
+ .callback = mlxplat_dmi_default_matched,
+ .matches = {
+ DMI_MATCH(DMI_BOARD_VENDOR, "Mellanox Technologies"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "MSN27"),
+ },
+ },
+ {
+ .callback = mlxplat_dmi_default_matched,
+ .matches = {
+ DMI_MATCH(DMI_BOARD_VENDOR, "Mellanox Technologies"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "MSB"),
+ },
+ },
+ {
+ .callback = mlxplat_dmi_default_matched,
+ .matches = {
+ DMI_MATCH(DMI_BOARD_VENDOR, "Mellanox Technologies"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "MSX"),
+ },
+ },
+ {
+ .callback = mlxplat_dmi_msn21xx_matched,
+ .matches = {
+ DMI_MATCH(DMI_BOARD_VENDOR, "Mellanox Technologies"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "MSN21"),
+ },
+ },
+ { }
+};
+
+static int __init mlxplat_init(void)
+{
+ struct mlxplat_priv *priv;
+ int i, err;
+
+ if (!dmi_check_system(mlxplat_dmi_table))
+ return -ENODEV;
+
+ mlxplat_dev = platform_device_register_simple(MLX_PLAT_DEVICE_NAME, -1,
+ mlxplat_lpc_resources,
+ ARRAY_SIZE(mlxplat_lpc_resources));
+
+ if (!mlxplat_dev)
+ return -ENOMEM;
+
+ priv = devm_kzalloc(&mlxplat_dev->dev, sizeof(struct mlxplat_priv),
+ GFP_KERNEL);
+ if (!priv) {
+ err = -ENOMEM;
+ goto fail_alloc;
+ }
+ platform_set_drvdata(mlxplat_dev, priv);
+
+ priv->pdev_i2c = platform_device_register_simple("i2c_mlxcpld", -1,
+ NULL, 0);
+ if (IS_ERR(priv->pdev_i2c)) {
+ err = PTR_ERR(priv->pdev_i2c);
+ goto fail_alloc;
+ };
+
+ for (i = 0; i < ARRAY_SIZE(mlxplat_mux_data); i++) {
+ priv->pdev_mux[i] = platform_device_register_resndata(
+ &mlxplat_dev->dev,
+ "i2c-mux-reg", i, NULL,
+ 0, &mlxplat_mux_data[i],
+ sizeof(mlxplat_mux_data[i]));
+ if (IS_ERR(priv->pdev_mux[i])) {
+ err = PTR_ERR(priv->pdev_mux[i]);
+ goto fail_platform_mux_register;
+ }
+ }
+
+ return 0;
+
+fail_platform_mux_register:
+ for (i--; i > 0 ; i--)
+ platform_device_unregister(priv->pdev_mux[i]);
+ platform_device_unregister(priv->pdev_i2c);
+fail_alloc:
+ platform_device_unregister(mlxplat_dev);
+
+ return err;
+}
+module_init(mlxplat_init);
+
+static void __exit mlxplat_exit(void)
+{
+ struct mlxplat_priv *priv = platform_get_drvdata(mlxplat_dev);
+ int i;
+
+ for (i = ARRAY_SIZE(mlxplat_mux_data) - 1; i >= 0 ; i--)
+ platform_device_unregister(priv->pdev_mux[i]);
+
+ platform_device_unregister(priv->pdev_i2c);
+ platform_device_unregister(mlxplat_dev);
+}
+module_exit(mlxplat_exit);
+
+MODULE_AUTHOR("Vadim Pasternak (vadimp@mellanox.com)");
+MODULE_DESCRIPTION("Mellanox platform driver");
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_ALIAS("dmi:*:*Mellanox*:MSN24*:");
+MODULE_ALIAS("dmi:*:*Mellanox*:MSN27*:");
+MODULE_ALIAS("dmi:*:*Mellanox*:MSB*:");
+MODULE_ALIAS("dmi:*:*Mellanox*:MSX*:");
+MODULE_ALIAS("dmi:*:*Mellanox*:MSN21*:");
projects / platform / kernel / linux-rpi.git / commitdiff