wr-nic: structure is filled

kernel/wr-nic-core.c

+/*
+ * Copyright (C) 2012 CERN (www.cern.ch)
+ * Author: Alessandro Rubini <rubini@gnudd.com>
+ *
+ * Released according to the GNU GPL, version 2 or any later version.
+ *
+ * This work is part of the White Rabbit project, a research effort led
+ * by CERN, the European Institute for Nuclear Research.
+ */
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/firmware.h>
+#include <linux/fmc.h>
+#include "wr-nic.h"
+#include "spec.h"
+
+static char *wrn_filename = "wr_nic_dio.bin";
+module_param_named(file, wrn_filename, charp, 0444);
+
+irqreturn_t wrn_handler(int irq, void *dev_id)
+{
+	struct fmc_device *fmc = dev_id;
+
+	fmc->op->irq_ack(fmc);
+	printk("%s: irq %i\n", __func__, irq);
+	return IRQ_HANDLED;
+}
+
+int wrn_probe(struct fmc_device *fmc)
+{
+	int ret;
+	struct device *dev = fmc->hwdev;
+	const struct firmware *fw;
+
+	/* We first write a new binary within the spec */
+	if (wrn_filename) {
+
+		ret = request_firmware(&fw, wrn_filename, dev);
+		if (ret < 0) {
+			dev_warn(dev, "request firmware \"%s\": error %i\n",
+				wrn_filename, ret);
+			goto out;
+		}
+		ret = fmc->op->reprogram(fmc, (void *)fw->data, fw->size);
+		if (ret <0) {
+			dev_err(dev, "write firmware \"%s\": error %i\n",
+				wrn_filename, ret);
+			goto out_fw;
+		}
+	}
+
+	/* Verify that we have SDB at offset 0x30000 */
+	if (fmc_readl(fmc, 0x30000) != 0x5344422d) {
+		dev_err(dev, "Can't find SDB magic\n");
+		ret = -ENODEV;
+		goto out_fw;
+	}
+
+	/* Register the gpio stuff,  if we have kernel support */
+	ret = wrn_gpio_init(fmc);
+	if (ret < 0)
+		goto out_fw;
+
+	/* The netword device */
+	ret = wrn_eth_init(fmc);
+	if (ret < 0)
+		goto out_gpio;
+
+	/* The interrupt */
+	ret = fmc->op->irq_request(fmc, wrn_handler, "wr-nic", 0);
+	if (ret < 0) {
+		dev_err(dev, "Can't request interrupt\n");
+		goto out_nic;
+	}
+	return 0;
+
+out_nic:
+	wrn_eth_exit(fmc);
+out_gpio:
+	wrn_gpio_exit(fmc);
+out_fw:
+	release_firmware(fw);
+out:
+	return ret;
+}
+
+int wrn_remove(struct fmc_device *fmc)
+{
+	fmc->op->irq_free(fmc);
+	wrn_eth_exit(fmc);
+	wrn_gpio_exit(fmc);
+	return 0;
+}
+
+static struct fmc_driver wrn_drv = {
+	.driver.name = KBUILD_MODNAME,
+	.probe = wrn_probe,
+	.remove = wrn_remove,
+	/* no table, as the current match just matches everything */
+};
+
+static int wrn_init(void)
+{
+	int ret;
+
+	ret = fmc_driver_register(&wrn_drv);
+	return ret;
+}
+
+static void wrn_exit(void)
+{
+	fmc_driver_unregister(&wrn_drv);
+}
+
+module_init(wrn_init);
+module_exit(wrn_exit);
+
+/* If no gpio lib is there, this weak applies */
+int __weak wrn_gpio_init(struct fmc_device *fmc)
+{
+        return 0;
+}
+void __weak wrn_gpio_exit(struct fmc_device *fmc)
+{
+}
+
+MODULE_LICENSE("GPL");

kernel/wr-nic-eth.c

+/*
+ * Copyright (C) 2012 CERN (www.cern.ch)
+ * Author: Alessandro Rubini <rubini@gnudd.com>
+ *
+ * Released according to the GNU GPL, version 2 or any later version.
+ *
+ * This work is part of the White Rabbit project, a research effort led
+ * by CERN, the European Institute for Nuclear Research.
+ */
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/fmc.h>
+#include "wr-nic.h"
+#include "spec.h"
+
+int wrn_eth_init(struct fmc_device *fmc)
+{
+	return 0;
+}
+
+void wrn_eth_exit(struct fmc_device *fmc)
+{
+}

kernel/wr-nic-gpio.c

+#include <linux/kernel.h>
+#include <linux/gpio.h>
+#include <linux/fmc.h>
+#include "spec.h"
+#include "wr-nic.h"
+
+int wrn_gpio_init(struct fmc_device *fmc)
+{
+	return 0;
+}
+
+void wrn_gpio_exit(struct fmc_device *fmc)
+{
+}

kernel/wr-nic.h

+#ifndef __WR_NIC_H__
+#define __WR_NIC_H__
+#include <linux/gpio.h>
+
+/*
+ * This is the memory map of this beast, from "./top/spec/wr_nic_sdb_top.vhd"
+ * in the wr-nic ohwr project (git@ohwr.org:white-rabbit/wr-nic.git for us
+ * and git://ohwr.org/white-rabbit/wr-nic.git for everybody)
+ *
+ * -- Memory map:
+ * --  0x00000000: WRPC
+ * --     0x00000: WRPC I/D Memory
+ * --     0x20000: WRPC Peripheral interconnect
+ * --      +0x000: WRPC Minic
+ * --      +0x100: WRPC Endpoint
+ * --      +0x200: WRPC Softpll
+ * --      +0x300: WRPC PPS gen
+ * --      +0x400: WRPC Syscon
+ * --      +0x500: WRPC UART
+ * --      +0x600: WRPC OneWire
+ * --      +0x700: WRPC Auxillary space (Etherbone config, etc)
+ * --  0x00040000: WRSW NIC
+ * --  0x00060000: VIC
+ * --  0x00061000: TxTSU
+ * --  0x00062000: DIO
+ * --       0x000: DIO-ONEWIRE
+ * --       0x100: DIO-I2C
+ * --       0x200: DIO-GPIO
+ * --       0x300: DIO-REGISTERS
+ * (plus, at 63000 there are the sdb records)
+ */
+
+#define WRN_GPIO	0x62200 /* "standard" GPIO registers */
+#define WRN_DIO		0x62300 /* time-aware gpio registers */
+#define WRN_SDB		0x63000
+
+
+#define WRN_GATEWARE_DEFAULT_NAME "fmc/wr_nic_dio.bin"
+
+struct wrn_drvdata {
+	struct gpio_chip *gc;
+	struct net_device *eth;
+	/* We also need the various base addresses here for fmc_writel/readl */
+	__iomem void *gpio_baseaddr;
+};
+
+/* wr-nic-eth.c */
+extern int wrn_eth_init(struct fmc_device *fmc);
+extern void wrn_eth_exit(struct fmc_device *fmc);
+
+/* wr-nic-gpio.h */
+extern int wrn_gpio_init(struct fmc_device *fmc);
+extern void wrn_gpio_exit(struct fmc_device *fmc);
+
+#endif /* __WR_NIC_H__ */