nvidia-oot: add support for mttcan driver

Using this patch we are adding support for
mttcan driver in oot kernel.

JIRA ESLC-6885

Signed-off-by: Manish Bhardwaj <mbhardwaj@nvidia.com>
Change-Id: I83a6d43aa99278a546778cf1700e2bd106ec42a9
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/2785360
Reviewed-by: Bitan Biswas <bbiswas@nvidia.com>
GVS: Gerrit_Virtual_Submit <buildbot_gerritrpt@nvidia.com>

drivers/net/can/mttcan/include/m_ttcan_linux.h

@@ -0,0 +1,126 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (c) 2022, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+ */
+
+#ifndef _M_TTCAN_LINUX_H
+#define  _M_TTCAN_LINUX_H
+
+#include <linux/list.h>
+#include <linux/vmalloc.h>
+#include <linux/slab.h>
+#include <linux/kernel.h>
+#include <linux/netdevice.h>
+#include <linux/can/dev.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <linux/if_arp.h>
+#include <linux/if_ether.h>
+#include <linux/io.h>
+#include <linux/gpio.h>
+#include <linux/of_gpio.h>
+#include <linux/platform_device.h>
+#include <linux/clk.h>
+#include <linux/reset.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/pinctrl/consumer.h>
+#include <linux/pm_runtime.h>
+#include <linux/net_tstamp.h>
+#include <linux/spinlock.h>
+#include <linux/clocksource.h>
+#include <linux/platform/tegra/ptp-notifier.h>
+#include <linux/mailbox_client.h>
+#ifdef CONFIG_CLK_SRC_TEGRA18_US_TIMER
+#include <linux/tegra-us-timer.h>
+#endif
+
+#include <asm/io.h>
+#include "m_ttcan_ivc.h"
+
+#define MTTCAN_RX_FIFO_INTR     (0xFF)
+#define MTTCAN_RX_HP_INTR       (0x1 << 8)
+#define MTTCAN_TX_EV_FIFO_INTR  (0xF << 12)
+
+#define MTTCAN_ERR_INTR       (0x1FF9 << 17)
+#define MTTCAN_BUS_OFF        (1 << 25)
+#define MTTCAN_ERR_WARN       (1 << 24)
+#define MTTCAN_ERR_PASS       (1 << 23)
+
+#define MTT_CAN_NAPI_WEIGHT	64
+#define MTT_CAN_TX_OBJ_NUM	32
+#define MTT_CAN_MAX_MRAM_ELEMS	9
+#define MTT_MAX_TX_CONF		4
+#define MTT_MAX_RX_CONF		3
+
+#define MTTCAN_POLL_TIME	50
+#define MTTCAN_HWTS_ROLLOVER	250
+/* block period in ms */
+#define TX_BLOCK_PERIOD		200
+#define TSC_REF_CLK_RATE	31250000
+
+#define MTTCAN_TSC_SIZE		16U
+#define MTTCAN_TSC_MASK		0xFFFFULL
+#define TSC_REF_CLK_SHIFT	9U
+
+struct tegra_mttcan_soc_info {
+	bool set_can_core_clk;
+	unsigned long can_core_clk_rate;
+	unsigned long can_clk_rate;
+	bool use_external_timer;
+};
+
+struct can_gpio {
+	int gpio;
+	int active_low;
+};
+
+struct mttcan_priv {
+	struct can_priv can;
+	struct ttcan_controller *ttcan;
+	const struct tegra_mttcan_soc_info *sinfo;
+	struct delayed_work can_work;
+	struct delayed_work drv_restart_work;
+	struct napi_struct napi;
+	struct net_device *dev;
+	struct device *device;
+	struct clk *can_clk, *host_clk, *core_clk;
+	struct can_gpio gpio_can_en;
+	struct can_gpio gpio_can_stb;
+	struct timer_list timer;
+	struct cyclecounter cc;
+	struct timecounter tc;
+	struct hwtstamp_config hwtstamp_config;
+	struct mbox_client cl;
+	struct completion xfer_completion;
+	struct mbox_chan *mbox;
+	raw_spinlock_t tc_lock; /* lock to protect timecounter infra */
+	spinlock_t tslock; /* lock to protect ioctl */
+	spinlock_t tx_lock; /* lock to protect transmit path */
+	void __iomem *regs;
+	void __iomem *mres;
+	void *std_shadow;
+	void *xtd_shadow;
+	void *tmc_shadow;
+	u32 gfc_reg;
+	u32 xidam_reg;
+	u32 irq_flags;
+	u32 irq_ttflags;
+	u32 irqstatus;
+	u32 tt_irqstatus;
+	u32 instance;
+	int tt_intrs;
+	int tt_param[2];
+	u32 mram_param[MTT_CAN_MAX_MRAM_ELEMS];
+	u32 tx_conf[MTT_MAX_TX_CONF]; /*<txb, txq, txq_mode, txb_dsize>*/
+	u32 rx_conf[MTT_MAX_RX_CONF]; /*<rxb_dsize, rxq0_dsize, rxq1_dsize>*/
+	bool poll;
+	bool hwts_rx_en;
+	u32 resp;
+};
+
+int mttcan_create_sys_files(struct device *dev);
+void mttcan_delete_sys_files(struct device *dev);
+#endif