x86/platform/mellanox: Introduce support for Mellanox systems platform
authorVadim Pasternak <vadimp@mellanox.com>
Thu, 22 Sep 2016 21:13:42 +0000 (21:13 +0000)
committerThomas Gleixner <tglx@linutronix.de>
Thu, 22 Sep 2016 20:13:10 +0000 (22:13 +0200)
Enable system support for the Mellanox Technologies platform, which
provides support for the next Mellanox basic systems: "msx6710",
"msx6720", "msb7700", "msn2700", "msx1410", "msn2410", "msb7800",
"msn2740", "msn2100" and also various number of derivative systems from
the above basic types.

The Kconfig controlling compilation of this code is: MLX_PLATFORM

Signed-off-by: Vadim Pasternak <vadimp@mellanox.com>
Cc: jiri@resnulli.us
Cc: gregkh@linuxfoundation.org
Cc: platform-driver-x86@vger.kernel.org
Cc: geert@linux-m68k.org
Cc: linux@roeck-us.net
Cc: akpm@linux-foundation.org
Cc: mchehab@kernel.org
Cc: davem@davemloft.net
Cc: kvalo@codeaurora.org
Link: http://lkml.kernel.org/r/1474578822-33805-1-git-send-email-vadimp@mellanox.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
MAINTAINERS
arch/x86/Kconfig
arch/x86/platform/Makefile
arch/x86/platform/mellanox/Makefile [new file with mode: 0644]
arch/x86/platform/mellanox/mlx-platform.c [new file with mode: 0644]

index a0ce40f4c66c9885761e021298bec2683a10b276..2adc6ef635ced92859dd112014216e0cc13e11c3 100644 (file)
@@ -7668,6 +7668,12 @@ W:       http://www.mellanox.com
 Q:     http://patchwork.ozlabs.org/project/netdev/list/
 F:     drivers/net/ethernet/mellanox/mlxsw/
 
+MELLANOX PLATFORM DRIVER
+M:      Vadim Pasternak <vadimp@mellanox.com>
+L:      platform-driver-x86@vger.kernel.org
+S:      Supported
+F:      arch/x86/platform/mellanox/mlx-platform.c
+
 SOFT-ROCE DRIVER (rxe)
 M:     Moni Shoua <monis@mellanox.com>
 L:     linux-rdma@vger.kernel.org
index 2a1f0ce7c59acac6e1a6543eeda61ccb3792f277..a72b01b225f23cc47d353b9a01b737ebc0abddbc 100644 (file)
@@ -549,6 +549,18 @@ config X86_INTEL_QUARK
          Say Y here if you have a Quark based system such as the Arduino
          compatible Intel Galileo.
 
+config MLX_PLATFORM
+       tristate "Mellanox Technologies platform support"
+       depends on X86_64
+       depends on X86_EXTENDED_PLATFORM
+       ---help---
+         This option enables system support for the Mellanox Technologies
+         platform.
+
+         Say Y here if you are building a kernel for Mellanox system.
+
+         Otherwise, say N.
+
 config X86_INTEL_LPSS
        bool "Intel Low Power Subsystem Support"
        depends on X86 && ACPI
index 184842ef332e0123762c3463bd795ef4a9aaa282..3c3c19ea94df460b061e232f17cd35fd144eeef6 100644 (file)
@@ -8,6 +8,7 @@ obj-y   += iris/
 obj-y  += intel/
 obj-y  += intel-mid/
 obj-y  += intel-quark/
+obj-y  += mellanox/
 obj-y  += olpc/
 obj-y  += scx200/
 obj-y  += sfi/
diff --git a/arch/x86/platform/mellanox/Makefile b/arch/x86/platform/mellanox/Makefile
new file mode 100644 (file)
index 0000000..f43c931
--- /dev/null
@@ -0,0 +1 @@
+obj-$(CONFIG_MLX_PLATFORM)     += mlx-platform.o
diff --git a/arch/x86/platform/mellanox/mlx-platform.c b/arch/x86/platform/mellanox/mlx-platform.c
new file mode 100644 (file)
index 0000000..e1dc152
--- /dev/null
@@ -0,0 +1,266 @@
+/*
+ * 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*:");