siemens/nc_fpga: Add driver for Siemens NC FPGA
Add driver code to initialize Siemens NC FPGA as PCI device.
Beside some glue logic it contains a FAN controller and
temperature monitor.
Change-Id: I2cb722a60081028ee5a8251f51125f12ed38d824
Signed-off-by: Werner Zeh <werner.zeh@siemens.com>
Reviewed-on: https://review.coreboot.org/15543
Tested-by: build bot (Jenkins)
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
diff --git a/src/drivers/siemens/nc_fpga/nc_fpga.c b/src/drivers/siemens/nc_fpga/nc_fpga.c
new file mode 100644
index 0000000..def456b
--- /dev/null
+++ b/src/drivers/siemens/nc_fpga/nc_fpga.c
@@ -0,0 +1,139 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2016 Siemens AG.
+ *
+ * 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; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <types.h>
+#include <console/console.h>
+#include <device/pci.h>
+#include <device/pci_ids.h>
+#include <device/pci_ops.h>
+#include <device/pci_def.h>
+#include <string.h>
+#include <delay.h>
+#include <hwilib.h>
+#include "nc_fpga.h"
+
+#define FPGA_SET_PARAM(src, dst) \
+{ \
+ typeof(dst) var; \
+ size_t len = sizeof(var); \
+ if (hwilib_get_field(src, (uint8_t *)&var, len) == len) \
+ dst = (typeof(dst))(var); \
+}
+
+static void init_temp_mon (void *base_adr)
+{
+ uint32_t cc[5], i = 0;
+ uint8_t num = 0;
+ volatile fan_ctrl_t *ctrl = (fan_ctrl_t *)base_adr;
+
+ /* Program sensor delay first. */
+ FPGA_SET_PARAM(FANSensorDelay, ctrl->sensordelay);
+ /* Program correction curve for every used sensor. */
+ if (hwilib_get_field(FANSensorNum, &num, sizeof(num) != sizeof(num)) ||
+ (num == 0) || (num > MAX_NUM_SENSORS))
+ return;
+ for (i = 0; i < num; i ++) {
+ if (hwilib_get_field(FANSensorCfg0 + i, (uint8_t *)&cc[0],
+ sizeof(cc)) == sizeof(cc)) {
+ ctrl->sensorcfg[cc[0]].rmin = cc[1] & 0xffff;
+ ctrl->sensorcfg[cc[0]].rmax = cc[2] & 0xffff;
+ ctrl->sensorcfg[cc[0]].nmin = cc[3] & 0xffff;
+ ctrl->sensorcfg[cc[0]].nmax = cc[4] & 0xffff;
+ }
+ }
+ ctrl->sensornum = num;
+}
+
+static void init_fan_ctrl (void *base_adr)
+{
+ uint8_t mask = 0, freeze_mode = 0, fan_req = 0;
+ volatile fan_ctrl_t *ctrl = (fan_ctrl_t *)base_adr;
+
+ /* Program all needed fields of FAN controller. */
+ FPGA_SET_PARAM(FANSensorSelect, ctrl->sensorselect);
+ FPGA_SET_PARAM(T_Warn, ctrl->t_warn);
+ FPGA_SET_PARAM(T_Crit, ctrl->t_crit);
+ FPGA_SET_PARAM(FANSamplingTime, ctrl->samplingtime);
+ FPGA_SET_PARAM(FANSetPoint, ctrl->setpoint);
+ FPGA_SET_PARAM(FANHystCtrl, ctrl->hystctrl);
+ FPGA_SET_PARAM(FANHystVal, ctrl->hystval);
+ FPGA_SET_PARAM(FANHystThreshold, ctrl->hystthreshold);
+ FPGA_SET_PARAM(FANKp, ctrl->kp);
+ FPGA_SET_PARAM(FANKi, ctrl->ki);
+ FPGA_SET_PARAM(FANKd, ctrl->kd);
+ FPGA_SET_PARAM(FANMaxSpeed, ctrl->fanmax);
+ /* Set freeze and FAN configuration. */
+ if ((hwilib_get_field(FF_FanReq, &fan_req, 1) == 1) &&
+ (hwilib_get_field(FF_FreezeDis, &freeze_mode, 1) == 1)) {
+ if (!fan_req)
+ mask = 1;
+ else if (fan_req && freeze_mode)
+ mask = 2;
+ else
+ mask = 3;
+ ctrl->fanmon = mask << 10;
+ }
+}
+
+/** \brief This function is the driver entry point for the init phase
+ * of the PCI bus allocator. It will initialize all the needed parts
+ * of NC_FPGA.
+ * @param *dev Pointer to the used PCI device
+ * @return void Nothing is given back
+ */
+static void nc_fpga_init(struct device *dev)
+{
+ void *bar0_ptr = NULL;
+ uint8_t cmd_reg;
+ uint32_t cap = 0;
+
+ /* All we need is mapped to BAR 0, get the address. */
+ bar0_ptr = (void *)(pci_read_config32(dev, PCI_BASE_ADDRESS_0) &
+ ~PCI_BASE_ADDRESS_MEM_ATTR_MASK);
+ cmd_reg = pci_read_config8(dev, PCI_COMMAND);
+ /* Ensure BAR0 has a valid value. */
+ if (!bar0_ptr || !(cmd_reg & PCI_COMMAND_MEMORY))
+ return;
+ /* Ensure this is really a NC FPGA by checking magic register. */
+ if (read32(bar0_ptr + NC_MAGIC_OFFSET) != NC_FPGA_MAGIC)
+ return;
+ /* Open hwinfo block. */
+ if (hwilib_find_blocks("hwinfo.hex") != CB_SUCCESS)
+ return;
+ /* Set up FAN controller and temperature monitor according to */
+ /* capability bits. */
+ cap = read32(bar0_ptr + NC_CAP1_OFFSET);
+ if (cap & (NC_CAP1_TEMP_MON | NC_CAP1_FAN_CTRL))
+ init_temp_mon(bar0_ptr + NC_FANMON_CTRL_OFFSET);
+ if (cap & NC_CAP1_FAN_CTRL)
+ init_fan_ctrl(bar0_ptr + NC_FANMON_CTRL_OFFSET);
+}
+
+static struct device_operations nc_fpga_ops = {
+ .read_resources = pci_dev_read_resources,
+ .set_resources = pci_dev_set_resources,
+ .enable_resources = pci_dev_enable_resources,
+ .init = nc_fpga_init,
+ .scan_bus = 0,
+ .ops_pci = 0,
+};
+
+static const unsigned short nc_fpga_device_ids[] = { 0x4091, 0 };
+
+static const struct pci_driver nc_fpga_driver __pci_driver = {
+ .ops = &nc_fpga_ops,
+ .vendor = 0x110A,
+ .devices = nc_fpga_device_ids,
+};