From: Vadim Pasternak <vadimp@xxxxxxxxxxxx>
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 currently controlling compilation of this code is:
arch/x86/platform:config MLX_PLATFORM
arch/x86/platform: tristate "Mellanox Technologies platform support"
Signed-off-by: Vadim Pasternak <vadimp@xxxxxxxxxxxx>
---
MAINTAINERS | 7 +
arch/x86/Kconfig | 23 ++
arch/x86/platform/Makefile | 1 +
arch/x86/platform/mellanox/Makefile | 1 +
arch/x86/platform/mellanox/mlx-platform.c | 501 ++++++++++++++++++++++++++++++
5 files changed, 533 insertions(+)
create mode 100644 arch/x86/platform/mellanox/Makefile
create mode 100644 arch/x86/platform/mellanox/mlx-platform.c
diff --git a/MAINTAINERS b/MAINTAINERS
index 4705c94..8a675de 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -7664,6 +7664,13 @@ 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@xxxxxxxxxxxx>
+L: platform-driver-x86@xxxxxxxxxxxxxxx
+S: Supported
+W: http://www.mellanox.com
+F: arch/x86/platform/mellanox/mlx-platform.c
+
SOFT-ROCE DRIVER (rxe)
M: Moni Shoua <monis@xxxxxxxxxxxx>
L: linux-rdma@xxxxxxxxxxxxxxx
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index c580d8c..cc7efdd9 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -2631,6 +2631,29 @@ config TS5500
endif # X86_32
+config MLX_PLATFORM
+ tristate "Mellanox Technologies platform support"
+ depends on X86_64
+ depends on PCI
+ depends on DMI
+ depends on I2C_MLXCPLD
+ depends on I2C_MUX_REG
+ select HWMON
+ select PMBUS
+ select LM75
+ select NEW_LEDS
+ select LEDS_CLASS
+ select LEDS_TRIGGERS
+ select LEDS_TRIGGER_TIMER
+ select LEDS_MLXCPLD
+ ---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 AMD_NB
def_bool y
depends on CPU_SUP_AMD && PCI
diff --git a/arch/x86/platform/Makefile b/arch/x86/platform/Makefile
index 184842e..3c3c19e 100644
--- a/arch/x86/platform/Makefile
+++ b/arch/x86/platform/Makefile
@@ -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
index 0000000..f43c931
--- /dev/null
+++ b/arch/x86/platform/mellanox/Makefile
@@ -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
index 0000000..02afa89
--- /dev/null
+++ b/arch/x86/platform/mellanox/mlx-platform.c
@@ -0,0 +1,501 @@
+/*
+ * arch/x86/platform/mellanox/mlx-platform.c
+ * Copyright (c) 2016 Mellanox Technologies. All rights reserved.
+ * Copyright (c) 2016 Vadim Pasternak <vadimp@xxxxxxxxxxxx>
+ *
+ * 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/acpi.h>
+#include <linux/device.h>
+#include <linux/i2c.h>
+#include <linux/i2c-mux.h>
+#include <linux/module.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/platform_data/i2c-mux-reg.h>
+#include <linux/pci.h>
+#include <linux/slab.h>
+#include <linux/version.h>
+
+#define MLX_PLAT_DEVICE_NAME "mlxplat"
+
+/* LPC IFC in PCH defines */
+#define MLXPLAT_CPLD_LPC_I2C_BASE_ADRR 0x2000
+#define MLXPLAT_CPLD_LPC_REG_BASE_ADRR 0x2500
+#define MLXPLAT_CPLD_LPC_CTRL_IFC_BUS_ID 0
+#define MLXPLAT_CPLD_LPC_CTRL_IFC_SLOT_ID 31
+#define MLXPLAT_CPLD_LPC_CTRL_IFC_FUNC_ID 0
+#define MLXPLAT_CPLD_LPC_QM67_DEV_ID 0x1c4f
+#define MLXPLAT_CPLD_LPC_QM77_DEV_ID 0x1e55
+#define MLXPLAT_CPLD_LPC_RNG_DEV_ID 0x1f38
+#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)
+
+/* Use generic decode range 4 for CPLD LPC */
+#define MLXPLAT_CPLD_LPC_PCH_GEN_DEC_RANGE4 0x90
+#define MLXPLAT_CPLD_LPC_PCH_GEN_DEC_BASE 0x84
+#define MLXPLAT_CPLD_LPC_RNG_CTRL 0x84
+#define MLXPLAT_CPLD_LPC_PCH_GEN_DEC_RANGES 4
+#define MLXPLAT_CPLD_LPC_I2C_RANGE 2
+#define MLXPLAT_CPLD_LPC_RANGE 3
+#define MLXPLAT_CPLD_LPC_CLKS_EN 0
+#define MLXPLAT_CPLD_LPC_IO_RANGE 0x100
+
+/* Start channel numbers */
+#define MLXPLAT_CPLD_CH1 2
+#define MLXPLAT_CPLD_CH2 10
+
+/* mlxplat_priv - board private data
+ * @lpc_reg - register space
+ * @dev_id - platform device id
+ * @lpc_i2c_res- lpc cpld i2c resource space
+ * @lpc_cpld_res - lpc cpld register resource space
+ * @pdev - platform device
+ */
+struct mlxplat_priv {
+ u32 lpc_reg[MLXPLAT_CPLD_LPC_PCH_GEN_DEC_RANGES];
+ u16 dev_id;
+ struct resource *lpc_i2c_res;
+ struct resource *lpc_cpld_res;
+ struct platform_device *pdev;
+ struct platform_device *pdev_i2c;
+};
+
+/* Regions for LPC I2C controller and LPC base register space */
+static 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),
+};
+
+/* Platfform channels */
+static int mlxplat_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 mux data */
+struct i2c_mux_reg_platform_data mlxplat_mux_data[] = {
+ {
+ .parent = 1,
+ .base_nr = MLXPLAT_CPLD_CH1,
+ .write_only = 1,
+ .values = mlxplat_channels[0],
+ .n_values = ARRAY_SIZE(mlxplat_channels[0]),
+ .reg = (void __iomem *)MLXPLAT_CPLD_LPC_REG1,
+ .reg_size = 1,
+ .idle_in_use = 1,
+ },
+ {
+ .parent = 1,
+ .base_nr = MLXPLAT_CPLD_CH2,
+ .write_only = 1,
+ .values = mlxplat_channels[1],
+ .n_values = ARRAY_SIZE(mlxplat_channels[1]),
+ .reg = (void __iomem *)MLXPLAT_CPLD_LPC_REG2,
+ .reg_size = 1,
+ .idle_in_use = 1,
+ },
+
+};
+
+/* mlxplat_topology - platform entry data:
+ * @pdev - platform device
+ * @name - platform device name
+ */
+struct mlxplat_topology {
+ struct platform_device *pdev;
+ const char *name;
+};
+
+/* Platform topology */
+struct mlxplat_topology mlxplat_topo[] = {
+ {
+ .name = "i2c-mux-reg",
+ },
+ {
+ .name = "i2c-mux-reg",
+ },
+};
+
+struct platform_device *mlxplat_dev;
+
+static int mlxplat_lpc_i2c_dec_range_config(struct mlxplat_priv *priv,
+ struct pci_dev *pdev, u8 range,
+ u16 base_addr)
+{
+ u16 rng_reg;
+ u32 val;
+ int err;
+
+ if (range >= MLXPLAT_CPLD_LPC_PCH_GEN_DEC_RANGES) {
+ dev_err(&priv->pdev->dev, "Incorrect LPC decode range %d > %d\n",
+ range, MLXPLAT_CPLD_LPC_PCH_GEN_DEC_RANGES);
+ return -ERANGE;
+ }
+
+ rng_reg = MLXPLAT_CPLD_LPC_PCH_GEN_DEC_BASE + 4 * range;
+ err = pci_read_config_dword(pdev, rng_reg, &val);
+ if (err) {
+ dev_err(&priv->pdev->dev, "Access to LPC_PCH config failed, err %d\n",
+ err);
+ return -EFAULT;
+ }
+ priv->lpc_reg[range] = val;
+
+ /* Clean all bits excepted reserved (reserved: 2, 16, 17 , 24 - 31). */
+ val &= 0xff030002;
+ /* Set bits 18 - 23 to allow decode range address mask, set bit 1 to
+ * enable decode range, clear bit 1,2 in base address.
+ */
+ val |= 0xfc0001 | (base_addr & 0xfff3);
+ err = pci_write_config_dword(pdev, rng_reg, val);
+ if (err)
+ dev_err(&priv->pdev->dev, "Config of LPC_PCH Generic Decode Range %d failed, err %d\n",
+ range, err);
+
+ return err;
+}
+
+static void mlxplat_lpc_dec_rng_config_clean(struct pci_dev *pdev, u32 val,
+ u8 range)
+{
+ /* Restore old value */
+ if (pci_write_config_dword(pdev, (MLXPLAT_CPLD_LPC_PCH_GEN_DEC_BASE +
+ range * 4), val))
+ dev_err(&pdev->dev, "Deconfig of LPC_PCH Generic Decode Range %x failed\n",
+ range);
+
+}
+
+static int mlxplat_lpc_request_region(struct mlxplat_priv *priv,
+ struct resource *res)
+{
+ resource_size_t size = resource_size(res);
+
+ if (!devm_request_region(&priv->pdev->dev, res->start, size,
+ res->name)) {
+ devm_release_region(&priv->pdev->dev, res->start, size);
+
+ if (!devm_request_region(&priv->pdev->dev, res->start, size,
+ res->name)) {
+ dev_err(&priv->pdev->dev, "Request ioregion 0x%llx len 0x%llx for %s fail\n",
+ res->start, size, res->name);
+ return -EIO;
+ }
+ }
+
+ return 0;
+}
+
+static int mlxplat_lpc_request_regions(struct mlxplat_priv *priv)
+{
+ int i;
+ int err;
+
+ for (i = 0; i < ARRAY_SIZE(mlxplat_lpc_resources); i++) {
+ err = mlxplat_lpc_request_region(priv,
+ &mlxplat_lpc_resources[i]);
+ if (err)
+ return err;
+ }
+
+ priv->lpc_i2c_res = &mlxplat_lpc_resources[0];
+ priv->lpc_cpld_res = &mlxplat_lpc_resources[1];
+
+ return 0;
+}
+
+static int mlxplat_lpc_ivb_config(struct mlxplat_priv *priv,
+ struct pci_dev *pdev)
+{
+ int err;
+
+ err = mlxplat_lpc_i2c_dec_range_config(priv, pdev,
+ MLXPLAT_CPLD_LPC_I2C_RANGE,
+ MLXPLAT_CPLD_LPC_I2C_BASE_ADRR);
+ if (err) {
+ dev_err(&priv->pdev->dev, "LPC decode range %d config failed, err %d\n",
+ MLXPLAT_CPLD_LPC_I2C_RANGE, err);
+ pci_dev_put(pdev);
+ return -EFAULT;
+ }
+
+ err = mlxplat_lpc_i2c_dec_range_config(priv, pdev,
+ MLXPLAT_CPLD_LPC_RANGE,
+ MLXPLAT_CPLD_LPC_REG_BASE_ADRR);
+ if (err) {
+ dev_err(&priv->pdev->dev, "LPC decode range %d config failed, err %d\n",
+ MLXPLAT_CPLD_LPC_I2C_RANGE, err);
+ return -EFAULT;
+ }
+
+ return err;
+}
+
+static void mlxplat_lpc_ivb_config_clean(struct mlxplat_priv *priv,
+ struct pci_dev *pdev)
+{
+ mlxplat_lpc_dec_rng_config_clean(pdev,
+ priv->lpc_reg[MLXPLAT_CPLD_LPC_RANGE],
+ MLXPLAT_CPLD_LPC_RANGE);
+ mlxplat_lpc_dec_rng_config_clean(pdev,
+ priv->lpc_reg[MLXPLAT_CPLD_LPC_I2C_RANGE],
+ MLXPLAT_CPLD_LPC_I2C_RANGE);
+
+}
+
+static int mlxplat_lpc_range_config(struct mlxplat_priv *priv,
+ struct pci_dev *pdev)
+{
+ u32 val, lpc_clks;
+ int err;
+
+ err = pci_read_config_dword(pdev, MLXPLAT_CPLD_LPC_RNG_CTRL, &val);
+ if (err) {
+ dev_err(&priv->pdev->dev, "Access to LPC Ctrl reg failed, err %d\n",
+ err);
+ return -EFAULT;
+ }
+ lpc_clks = val & 0x3;
+ if (lpc_clks != MLXPLAT_CPLD_LPC_CLKS_EN) {
+ val &= 0xFFFFFFFC;
+ err = pci_write_config_dword(pdev, MLXPLAT_CPLD_LPC_RNG_CTRL,
+ val);
+ if (err) {
+ dev_err(&priv->pdev->dev, "Config LPC CLKS CTRL failed, err %d\n",
+ err);
+ return -EFAULT;
+ }
+ }
+
+ return err;
+}
+
+static int mlxplat_lpc_config(struct mlxplat_priv *priv)
+{
+ struct pci_dev *pdev = NULL;
+ u16 dev_id;
+ int err;
+
+ pdev = pci_get_bus_and_slot(MLXPLAT_CPLD_LPC_CTRL_IFC_BUS_ID,
+ PCI_DEVFN(MLXPLAT_CPLD_LPC_CTRL_IFC_SLOT_ID,
+ MLXPLAT_CPLD_LPC_CTRL_IFC_FUNC_ID));
+
