1 files changed, 109 insertions, 0 deletions

diff --git a/include/linux/moxtet.h b/include/linux/moxtet.h
new file mode 100644
index 000000000000..490db6886dcc
--- /dev/null
+++ b/include/linux/moxtet.h
@@ -0,0 +1,109 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Turris Mox module configuration bus driver
+ *
+ * Copyright (C) 2019 Marek Behun <marek.behun@nic.cz>
+ */
+
+#ifndef __LINUX_MOXTET_H
+#define __LINUX_MOXTET_H
+
+#include <linux/device.h>
+#include <linux/irq.h>
+#include <linux/irqdomain.h>
+#include <linux/mutex.h>
+
+#define TURRIS_MOX_MAX_MODULES  10
+
+enum turris_mox_cpu_module_id {
+        TURRIS_MOX_CPU_ID_EMMC  = 0x00,
+        TURRIS_MOX_CPU_ID_SD    = 0x10,
+};
+
+enum turris_mox_module_id {
+        TURRIS_MOX_MODULE_FIRST         = 0x01,
+
+        TURRIS_MOX_MODULE_SFP           = 0x01,
+        TURRIS_MOX_MODULE_PCI           = 0x02,
+        TURRIS_MOX_MODULE_TOPAZ         = 0x03,
+        TURRIS_MOX_MODULE_PERIDOT       = 0x04,
+        TURRIS_MOX_MODULE_USB3          = 0x05,
+        TURRIS_MOX_MODULE_PCI_BRIDGE    = 0x06,
+
+        TURRIS_MOX_MODULE_LAST          = 0x06,
+};
+
+#define MOXTET_NIRQS    16
+
+extern struct bus_type moxtet_type;
+
+struct moxtet {
+        struct device                   *dev;
+        struct mutex                    lock;
+        u8                              modules[TURRIS_MOX_MAX_MODULES];
+        int                             count;
+        u8                              tx[TURRIS_MOX_MAX_MODULES];
+        int                             dev_irq;
+        struct {
+                struct irq_domain       *domain;
+                struct irq_chip         chip;
+                unsigned long           masked, exists;
+                struct moxtet_irqpos {
+                                        u8 idx;
+                                        u8 bit;
+                } position[MOXTET_NIRQS];
+        } irq;
+#ifdef CONFIG_DEBUG_FS
+        struct dentry                   *debugfs_root;
+#endif
+};
+
+struct moxtet_driver {
+        const enum turris_mox_module_id *id_table;
+        struct device_driver            driver;
+};
+
+static inline struct moxtet_driver *
+to_moxtet_driver(struct device_driver *drv)
+{
+        if (!drv)
+                return NULL;
+        return container_of(drv, struct moxtet_driver, driver);
+}
+
+extern int __moxtet_register_driver(struct module *owner,
+                                    struct moxtet_driver *mdrv);
+
+static inline void moxtet_unregister_driver(struct moxtet_driver *mdrv)
+{
+        if (mdrv)
+                driver_unregister(&mdrv->driver);
+}
+
+#define moxtet_register_driver(driver) \
+        __moxtet_register_driver(THIS_MODULE, driver)
+
+#define module_moxtet_driver(__moxtet_driver) \
+        module_driver(__moxtet_driver, moxtet_register_driver, \
+                        moxtet_unregister_driver)
+
+struct moxtet_device {
+        struct device                   dev;
+        struct moxtet                   *moxtet;
+        enum turris_mox_module_id       id;
+        unsigned int                    idx;
+};
+
+extern int moxtet_device_read(struct device *dev);
+extern int moxtet_device_write(struct device *dev, u8 val);
+extern int moxtet_device_written(struct device *dev);
+
+static inline struct moxtet_device *
+to_moxtet_device(struct device *dev)
+{
+        if (!dev)
+                return NULL;
+        return container_of(dev, struct moxtet_device, dev);
+}
+
+#endif /* __LINUX_MOXTET_H */