NFC: nfcmrvl: add firmware download support

Implement firmware download protocol for Marvell NFC controllers.
This protocol is based on NCI frames that's why parts of its
implementation use some NCI generic functions.

Signed-off-by: Vincent Cuissard <cuissard@marvell.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

drivers/nfc/nfcmrvl/Makefile

@@ -2,7 +2,7 @@
 # Makefile for NFCMRVL NCI based NFC driver
 #
 
-nfcmrvl-y += main.o
+nfcmrvl-y += main.o fw_dnld.o
 obj-$(CONFIG_NFC_MRVL) += nfcmrvl.o
 
 nfcmrvl_usb-y += usb.o

drivers/nfc/nfcmrvl/fw_dnld.c

@@ -0,0 +1,553 @@
+/*
+ * Marvell NFC driver: Firmware downloader
+ *
+ * Copyright (C) 2015, Marvell International Ltd.
+ *
+ * This software file (the "File") is distributed by Marvell International
+ * Ltd. under the terms of the GNU General Public License Version 2, June 1991
+ * (the "License").  You may use, redistribute and/or modify this File in
+ * accordance with the terms and conditions of the License, a copy of which
+ * is available on the worldwide web at
+ * http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
+ *
+ * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
+ * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
+ * this warranty disclaimer.
+ */
+
+#include <linux/module.h>
+#include <linux/unaligned/access_ok.h>
+#include <linux/firmware.h>
+#include <linux/nfc.h>
+#include <net/nfc/nci.h>
+#include <net/nfc/nci_core.h>
+#include "nfcmrvl.h"
+
+#define FW_DNLD_TIMEOUT			15000
+
+#define NCI_OP_PROPRIETARY_BOOT_CMD	nci_opcode_pack(NCI_GID_PROPRIETARY, \
+							NCI_OP_PROP_BOOT_CMD)
+
+/* FW download states */
+
+enum {
+	STATE_RESET = 0,
+	STATE_INIT,
+	STATE_SET_REF_CLOCK,
+	STATE_SET_HI_CONFIG,
+	STATE_OPEN_LC,
+	STATE_FW_DNLD,
+	STATE_CLOSE_LC,
+	STATE_BOOT
+};
+
+enum {
+	SUBSTATE_WAIT_COMMAND = 0,
+	SUBSTATE_WAIT_ACK_CREDIT,
+	SUBSTATE_WAIT_NACK_CREDIT,
+	SUBSTATE_WAIT_DATA_CREDIT,
+};
+
+/*
+** Patterns for responses
+*/
+
+static const uint8_t nci_pattern_core_reset_ntf[] = {
+	0x60, 0x00, 0x02, 0xA0, 0x01
+};
+
+static const uint8_t nci_pattern_core_init_rsp[] = {
+	0x40, 0x01, 0x11
+};
+
+static const uint8_t nci_pattern_core_set_config_rsp[] = {
+	0x40, 0x02, 0x02, 0x00, 0x00
+};
+
+static const uint8_t nci_pattern_core_conn_create_rsp[] = {
+	0x40, 0x04, 0x04, 0x00
+};
+
+static const uint8_t nci_pattern_core_conn_close_rsp[] = {
+	0x40, 0x05, 0x01, 0x00
+};
+
+static const uint8_t nci_pattern_core_conn_credits_ntf[] = {
+	0x60, 0x06, 0x03, 0x01, NCI_CORE_LC_CONNID_PROP_FW_DL, 0x01
+};
+
+static const uint8_t nci_pattern_proprietary_boot_rsp[] = {
+	0x4F, 0x3A, 0x01, 0x00
+};
+
+static struct sk_buff *alloc_lc_skb(struct nfcmrvl_private *priv, uint8_t plen)
+{
+	struct sk_buff *skb;
+	struct nci_data_hdr *hdr;
+
+	skb = nci_skb_alloc(priv->ndev, (NCI_DATA_HDR_SIZE + plen), GFP_KERNEL);
+	if (!skb) {
+		pr_err("no memory for data\n");
+		return NULL;
+	}
+
+	hdr = (struct nci_data_hdr *) skb_put(skb, NCI_DATA_HDR_SIZE);
+	hdr->conn_id = NCI_CORE_LC_CONNID_PROP_FW_DL;
+	hdr->rfu = 0;
+	hdr->plen = plen;
+
+	nci_mt_set((__u8 *)hdr, NCI_MT_DATA_PKT);
+	nci_pbf_set((__u8 *)hdr, NCI_PBF_LAST);
+
+	return skb;
+}
+
+static void fw_dnld_over(struct nfcmrvl_private *priv, u32 error)
+{
+	if (priv->fw_dnld.fw) {
+		release_firmware(priv->fw_dnld.fw);
+		priv->fw_dnld.fw = NULL;
+		priv->fw_dnld.header = NULL;
+		priv->fw_dnld.binary_config = NULL;
+	}
+
+	atomic_set(&priv->ndev->cmd_cnt, 0);
+	del_timer_sync(&priv->ndev->cmd_timer);
+
+	del_timer_sync(&priv->fw_dnld.timer);
+
+	nfc_info(priv->dev, "FW loading over (%d)]\n", error);
+
+	if (error != 0) {
+		/* failed, halt the chip to avoid power consumption */
+		nfcmrvl_chip_halt(priv);
+	}
+
+	nfc_fw_download_done(priv->ndev->nfc_dev, priv->fw_dnld.name, error);
+}
+
+static void fw_dnld_timeout(unsigned long arg)
+{
+	struct nfcmrvl_private *priv = (struct nfcmrvl_private *) arg;
+
+	nfc_err(priv->dev, "FW loading timeout");
+	priv->fw_dnld.state = STATE_RESET;
+	fw_dnld_over(priv, -ETIMEDOUT);
+}
+
+static int process_state_reset(struct nfcmrvl_private *priv,
+			       struct sk_buff *skb)
+{
+	if (sizeof(nci_pattern_core_reset_ntf) != skb->len ||
+	    memcmp(skb->data, nci_pattern_core_reset_ntf,
+		   sizeof(nci_pattern_core_reset_ntf)))
+		return -EINVAL;
+
+	nfc_info(priv->dev, "BootROM reset, start fw download\n");
+
+	/* Start FW download state machine */
+	priv->fw_dnld.state = STATE_INIT;
+	nci_send_cmd(priv->ndev, NCI_OP_CORE_INIT_CMD, 0, NULL);
+
+	return 0;
+}
+
+static int process_state_init(struct nfcmrvl_private *priv, struct sk_buff *skb)
+{
+	struct nci_core_set_config_cmd cmd;
+
+	if (sizeof(nci_pattern_core_init_rsp) >= skb->len ||
+	    memcmp(skb->data, nci_pattern_core_init_rsp,
+		   sizeof(nci_pattern_core_init_rsp)))
+		return -EINVAL;
+
+	cmd.num_params = 1;
+	cmd.param.id = NFCMRVL_PROP_REF_CLOCK;
+	cmd.param.len = 4;
+	memcpy(cmd.param.val, &priv->fw_dnld.header->ref_clock, 4);
+
+	nci_send_cmd(priv->ndev, NCI_OP_CORE_SET_CONFIG_CMD, 3 + cmd.param.len,
+		     &cmd);
+
+	priv->fw_dnld.state = STATE_SET_REF_CLOCK;
+	return 0;
+}
+
+static void create_lc(struct nfcmrvl_private *priv)
+{
+	uint8_t param[2] = { NCI_CORE_LC_PROP_FW_DL, 0x0 };
+
+	priv->fw_dnld.state = STATE_OPEN_LC;
+	nci_send_cmd(priv->ndev, NCI_OP_CORE_CONN_CREATE_CMD, 2, param);
+}
+
+static int process_state_set_ref_clock(struct nfcmrvl_private *priv,
+				       struct sk_buff *skb)
+{
+	struct nci_core_set_config_cmd cmd;
+
+	if (sizeof(nci_pattern_core_set_config_rsp) != skb->len ||
+	    memcmp(skb->data, nci_pattern_core_set_config_rsp, skb->len))
+		return -EINVAL;
+
+	cmd.num_params = 1;
+	cmd.param.id = NFCMRVL_PROP_SET_HI_CONFIG;
+
+	switch (priv->phy) {
+	case NFCMRVL_PHY_UART:
+		cmd.param.len = 5;
+		memcpy(cmd.param.val,
+		       &priv->fw_dnld.binary_config->uart.baudrate,
+		       4);
+		cmd.param.val[4] =
+			priv->fw_dnld.binary_config->uart.flow_control;
+		break;
+	case NFCMRVL_PHY_I2C:
+		cmd.param.len = 5;
+		memcpy(cmd.param.val,
+		       &priv->fw_dnld.binary_config->i2c.clk,
+		       4);
+		cmd.param.val[4] = 0;
+		break;
+	case NFCMRVL_PHY_SPI:
+		cmd.param.len = 5;
+		memcpy(cmd.param.val,
+		       &priv->fw_dnld.binary_config->spi.clk,
+		       4);
+		cmd.param.val[4] = 0;
+		break;
+	default:
+		create_lc(priv);
+		return 0;
+	}
+
+	priv->fw_dnld.state = STATE_SET_HI_CONFIG;
+	nci_send_cmd(priv->ndev, NCI_OP_CORE_SET_CONFIG_CMD, 3 + cmd.param.len,
+		     &cmd);
+	return 0;
+}
+
+static int process_state_set_hi_config(struct nfcmrvl_private *priv,
+				       struct sk_buff *skb)
+{
+	if (sizeof(nci_pattern_core_set_config_rsp) != skb->len ||
+	    memcmp(skb->data, nci_pattern_core_set_config_rsp, skb->len))
+		return -EINVAL;
+
+	create_lc(priv);
+	return 0;
+}
+
+static int process_state_open_lc(struct nfcmrvl_private *priv,
+				 struct sk_buff *skb)
+{
+	if (sizeof(nci_pattern_core_conn_create_rsp) >= skb->len ||
+	    memcmp(skb->data, nci_pattern_core_conn_create_rsp,
+		   sizeof(nci_pattern_core_conn_create_rsp)))
+		return -EINVAL;
+
+	priv->fw_dnld.state = STATE_FW_DNLD;
+	priv->fw_dnld.substate = SUBSTATE_WAIT_COMMAND;
+	priv->fw_dnld.offset = priv->fw_dnld.binary_config->offset;
+	return 0;
+}
+
+static int process_state_fw_dnld(struct nfcmrvl_private *priv,
+				 struct sk_buff *skb)
+{
+	uint16_t len;
+	uint16_t comp_len;
+	struct sk_buff *out_skb;
+
+	switch (priv->fw_dnld.substate) {
+	case SUBSTATE_WAIT_COMMAND:
+		/*
+		 * Command format:
+		 * B0..2: NCI header
+		 * B3   : Helper command (0xA5)
+		 * B4..5: le16 data size
+		 * B6..7: le16 data size complement (~)
+		 * B8..N: payload
+		 */
+
+		/* Remove NCI HDR */
+		skb_pull(skb, 3);
+		if (skb->data[0] != HELPER_CMD_PACKET_FORMAT || skb->len != 5) {
+			nfc_err(priv->dev, "bad command");
+			return -EINVAL;
+		}
+		skb_pull(skb, 1);
+		memcpy(&len, skb->data, 2);
+		skb_pull(skb, 2);
+		memcpy(&comp_len, skb->data, 2);
+		skb_pull(skb, 2);
+		len = get_unaligned_le16(&len);
+		comp_len = get_unaligned_le16(&comp_len);
+		if (((~len) & 0xFFFF) != comp_len) {
+			nfc_err(priv->dev, "bad len complement: %x %x %x",
+				len, comp_len, (~len & 0xFFFF));
+			out_skb = alloc_lc_skb(priv, 1);
+			if (!out_skb)
+				return -ENOMEM;
+			*skb_put(out_skb, 1) = 0xBF;
+			nci_send_frame(priv->ndev, out_skb);
+			priv->fw_dnld.substate = SUBSTATE_WAIT_NACK_CREDIT;
+			return 0;
+		}
+		priv->fw_dnld.chunk_len = len;
+		out_skb = alloc_lc_skb(priv, 1);
+		if (!out_skb)
+			return -ENOMEM;
+		*skb_put(out_skb, 1) = HELPER_ACK_PACKET_FORMAT;
+		nci_send_frame(priv->ndev, out_skb);
+		priv->fw_dnld.substate = SUBSTATE_WAIT_ACK_CREDIT;
+		break;
+
+	case SUBSTATE_WAIT_ACK_CREDIT:
+		if (sizeof(nci_pattern_core_conn_credits_ntf) != skb->len ||
+		    memcmp(nci_pattern_core_conn_credits_ntf, skb->data,
+			   skb->len)) {
+			nfc_err(priv->dev, "bad packet: waiting for credit");
+			return -EINVAL;
+		}
+		if (priv->fw_dnld.chunk_len == 0) {
+			/* FW Loading is done */
+			uint8_t conn_id = NCI_CORE_LC_CONNID_PROP_FW_DL;
+
+			priv->fw_dnld.state = STATE_CLOSE_LC;
+			nci_send_cmd(priv->ndev, NCI_OP_CORE_CONN_CLOSE_CMD,
+				     1, &conn_id);
+		} else {
+			out_skb = alloc_lc_skb(priv, priv->fw_dnld.chunk_len);
+			if (!out_skb)
+				return -ENOMEM;
+			memcpy(skb_put(out_skb, priv->fw_dnld.chunk_len),
+			       ((uint8_t *)priv->fw_dnld.fw->data) +
+			       priv->fw_dnld.offset,
+			       priv->fw_dnld.chunk_len);
+			nci_send_frame(priv->ndev, out_skb);
+			priv->fw_dnld.substate = SUBSTATE_WAIT_DATA_CREDIT;
+		}
+		break;
+
+	case SUBSTATE_WAIT_DATA_CREDIT:
+		if (sizeof(nci_pattern_core_conn_credits_ntf) != skb->len ||
+		    memcmp(nci_pattern_core_conn_credits_ntf, skb->data,
+			    skb->len)) {
+			nfc_err(priv->dev, "bad packet: waiting for credit");
+			return -EINVAL;
+		}
+		priv->fw_dnld.offset += priv->fw_dnld.chunk_len;
+		priv->fw_dnld.chunk_len = 0;
+		priv->fw_dnld.substate = SUBSTATE_WAIT_COMMAND;
+		break;
+
+	case SUBSTATE_WAIT_NACK_CREDIT:
+		if (sizeof(nci_pattern_core_conn_credits_ntf) != skb->len ||
+		    memcmp(nci_pattern_core_conn_credits_ntf, skb->data,
+			    skb->len)) {
+			nfc_err(priv->dev, "bad packet: waiting for credit");
+			return -EINVAL;
+		}
+		priv->fw_dnld.substate = SUBSTATE_WAIT_COMMAND;
+		break;
+	}
+	return 0;
+}
+
+static int process_state_close_lc(struct nfcmrvl_private *priv,
+				  struct sk_buff *skb)
+{
+	if (sizeof(nci_pattern_core_conn_close_rsp) != skb->len ||
+	    memcmp(skb->data, nci_pattern_core_conn_close_rsp, skb->len))
+		return -EINVAL;
+
+	priv->fw_dnld.state = STATE_BOOT;
+	nci_send_cmd(priv->ndev, NCI_OP_PROPRIETARY_BOOT_CMD, 0, NULL);
+	return 0;
+}
+
+static int process_state_boot(struct nfcmrvl_private *priv, struct sk_buff *skb)
+{
+	if (sizeof(nci_pattern_proprietary_boot_rsp) != skb->len ||
+	    memcmp(skb->data, nci_pattern_proprietary_boot_rsp, skb->len))
+		return -EINVAL;
+
+	/*
+	 * Update HI config to use the right configuration for the next
+	 * data exchanges.
+	 */
+	priv->if_ops->nci_update_config(priv,
+					&priv->fw_dnld.binary_config->config);
+
+	if (priv->fw_dnld.binary_config == &priv->fw_dnld.header->helper) {
+		/*
+		 * This is the case where an helper was needed and we have
+		 * uploaded it. Now we have to wait the next RESET NTF to start
+		 * FW download.
+		 */
+		priv->fw_dnld.state = STATE_RESET;
+		priv->fw_dnld.binary_config = &priv->fw_dnld.header->firmware;
+		nfc_info(priv->dev, "FW loading: helper loaded");
+	} else {
+		nfc_info(priv->dev, "FW loading: firmware loaded");
+		fw_dnld_over(priv, 0);
+	}
+	return 0;
+}
+
+static void fw_dnld_rx_work(struct work_struct *work)
+{
+	int ret;
+	struct sk_buff *skb;
+	struct nfcmrvl_fw_dnld *fw_dnld = container_of(work,
+						       struct nfcmrvl_fw_dnld,
+						       rx_work);
+	struct nfcmrvl_private *priv = container_of(fw_dnld,
+						    struct nfcmrvl_private,
+						    fw_dnld);
+
+	while ((skb = skb_dequeue(&fw_dnld->rx_q))) {
+		nfc_send_to_raw_sock(priv->ndev->nfc_dev, skb,
+				     RAW_PAYLOAD_NCI, NFC_DIRECTION_RX);
+		switch (fw_dnld->state) {
+		case STATE_RESET:
+			ret = process_state_reset(priv, skb);
+			break;
+		case STATE_INIT:
+			ret = process_state_init(priv, skb);
+			break;
+		case STATE_SET_REF_CLOCK:
+			ret = process_state_set_ref_clock(priv, skb);
+			break;
+		case STATE_SET_HI_CONFIG:
+			ret = process_state_set_hi_config(priv, skb);
+			break;
+		case STATE_OPEN_LC:
+			ret = process_state_open_lc(priv, skb);
+			break;
+		case STATE_FW_DNLD:
+			ret = process_state_fw_dnld(priv, skb);
+			break;
+		case STATE_CLOSE_LC:
+			ret = process_state_close_lc(priv, skb);
+			break;
+		case STATE_BOOT:
+			ret = process_state_boot(priv, skb);
+			break;
+		default:
+			ret = -EFAULT;
+		}
+
+		kfree_skb(skb);
+
+		if (ret != 0) {
+			nfc_err(priv->dev, "FW loading error");
+			fw_dnld_over(priv, ret);
+			break;
+		}
+	}
+}
+
+int	nfcmrvl_fw_dnld_init(struct nfcmrvl_private *priv)
+{
+	char name[32];
+
+	INIT_WORK(&priv->fw_dnld.rx_work, fw_dnld_rx_work);
+	snprintf(name, sizeof(name), "%s_nfcmrvl_fw_dnld_rx_wq",
+		 dev_name(priv->dev));
+	priv->fw_dnld.rx_wq = create_singlethread_workqueue(name);
+	if (!priv->fw_dnld.rx_wq)
+		return -ENOMEM;
+	skb_queue_head_init(&priv->fw_dnld.rx_q);
+	return 0;
+}
+
+void	nfcmrvl_fw_dnld_deinit(struct nfcmrvl_private *priv)
+{
+	destroy_workqueue(priv->fw_dnld.rx_wq);
+}
+
+void	nfcmrvl_fw_dnld_recv_frame(struct nfcmrvl_private *priv,
+				   struct sk_buff *skb)
+{
+	/* Allow next command */
+	atomic_set(&priv->ndev->cmd_cnt, 1);
+	del_timer_sync(&priv->ndev->cmd_timer);
+
+	/* Queue and trigger rx work */
+	skb_queue_tail(&priv->fw_dnld.rx_q, skb);
+	queue_work(priv->fw_dnld.rx_wq, &priv->fw_dnld.rx_work);
+}
+
+void nfcmrvl_fw_dnld_abort(struct nfcmrvl_private *priv)
+{
+	fw_dnld_over(priv, -EHOSTDOWN);
+}
+
+int nfcmrvl_fw_dnld_start(struct nci_dev *ndev, const char *firmware_name)
+{
+	struct nfcmrvl_private *priv = nci_get_drvdata(ndev);
+	struct nfcmrvl_fw_dnld *fw_dnld = &priv->fw_dnld;
+
+	if (!priv->support_fw_dnld)
+		return -ENOTSUPP;
+
+	if (!firmware_name || !firmware_name[0])
+		return -EINVAL;
+
+	strcpy(fw_dnld->name, firmware_name);
+
+	/*
+	 * Retrieve FW binary file and parse it to initialize FW download
+	 * state machine.
+	 */
+
+	/* Retrieve FW binary */
+	if (request_firmware(&fw_dnld->fw, firmware_name, priv->dev) < 0) {
+		nfc_err(priv->dev, "failed to retrieve FW %s", firmware_name);
+		return -ENOENT;
+	}
+
+	fw_dnld->header = (const struct nfcmrvl_fw *) priv->fw_dnld.fw->data;
+
+	if (fw_dnld->header->magic != NFCMRVL_FW_MAGIC ||
+	    fw_dnld->header->phy != priv->phy) {
+		nfc_err(priv->dev, "bad firmware binary %s magic=0x%x phy=%d",
+			firmware_name, fw_dnld->header->magic,
+			fw_dnld->header->phy);
+		release_firmware(fw_dnld->fw);
+		fw_dnld->header = NULL;
+		return -EINVAL;
+	}
+
+	if (fw_dnld->header->helper.offset != 0) {
+		nfc_info(priv->dev, "loading helper");
+		fw_dnld->binary_config = &fw_dnld->header->helper;
+	} else {
+		nfc_info(priv->dev, "loading firmware");
+		fw_dnld->binary_config = &fw_dnld->header->firmware;
+	}
+
+	/* Configure a timer for timeout */
+	setup_timer(&priv->fw_dnld.timer, fw_dnld_timeout,
+		    (unsigned long) priv);
+	mod_timer(&priv->fw_dnld.timer,
+		  jiffies + msecs_to_jiffies(FW_DNLD_TIMEOUT));
+
+	/* Ronfigure HI to be sure that it is the bootrom values */
+	priv->if_ops->nci_update_config(priv,
+					&fw_dnld->header->bootrom.config);
+
+	/* Allow first command */
+	atomic_set(&priv->ndev->cmd_cnt, 1);
+
+	/* First, reset the chip */
+	priv->fw_dnld.state = STATE_RESET;
+	nfcmrvl_chip_reset(priv);
+
+	/* Now wait for CORE_RESET_NTF or timeout */
+
+	return 0;
+}

drivers/nfc/nfcmrvl/fw_dnld.h

@@ -0,0 +1,98 @@
+/**
+ * Marvell NFC driver: Firmware downloader
+ *
+ * Copyright (C) 2015, Marvell International Ltd.
+ *
+ * This software file (the "File") is distributed by Marvell International
+ * Ltd. under the terms of the GNU General Public License Version 2, June 1991
+ * (the "License").  You may use, redistribute and/or modify this File in
+ * accordance with the terms and conditions of the License, a copy of which
+ * is available on the worldwide web at
+ * http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
+ *
+ * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
+ * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
+ * this warranty disclaimer.
+ **/
+
+#ifndef __NFCMRVL_FW_DNLD_H__
+#define __NFCMRVL_FW_DNLD_H__
+
+#include <linux/workqueue.h>
+
+#define NFCMRVL_FW_MAGIC		0x88888888
+
+#define NCI_OP_PROP_BOOT_CMD		0x3A
+
+#define NCI_CORE_LC_PROP_FW_DL		0xFD
+#define NCI_CORE_LC_CONNID_PROP_FW_DL	0x02
+
+#define HELPER_CMD_ENTRY_POINT		0x04
+#define HELPER_CMD_PACKET_FORMAT	0xA5
+#define HELPER_ACK_PACKET_FORMAT	0x5A
+#define HELPER_RETRY_REQUESTED		(1 << 15)
+
+struct nfcmrvl_private;
+
+struct nfcmrvl_fw_uart_config {
+	uint8_t flow_control;
+	uint32_t baudrate;
+} __packed;
+
+struct nfcmrvl_fw_i2c_config {
+	uint32_t clk;
+} __packed;
+
+struct nfcmrvl_fw_spi_config {
+	uint32_t clk;
+} __packed;
+
+struct nfcmrvl_fw_binary_config {
+	uint32_t offset;
+	union {
+		void *config;
+		struct nfcmrvl_fw_uart_config uart;
+		struct nfcmrvl_fw_i2c_config i2c;
+		struct nfcmrvl_fw_spi_config spi;
+		uint8_t reserved[64];
+	};
+} __packed;
+
+struct nfcmrvl_fw {
+	uint32_t magic;
+	uint32_t ref_clock;
+	uint32_t phy;
+	struct nfcmrvl_fw_binary_config bootrom;
+	struct nfcmrvl_fw_binary_config helper;
+	struct nfcmrvl_fw_binary_config firmware;
+	uint8_t reserved[64];
+} __packed;
+
+struct nfcmrvl_fw_dnld {
+	char name[NFC_FIRMWARE_NAME_MAXSIZE + 1];
+	const struct firmware *fw;
+
+	const struct nfcmrvl_fw *header;
+	const struct nfcmrvl_fw_binary_config *binary_config;
+
+	int state;
+	int substate;
+	int offset;
+	int chunk_len;
+
+	struct workqueue_struct	*rx_wq;
+	struct work_struct rx_work;
+	struct sk_buff_head rx_q;
+
+	struct timer_list timer;
+};
+
+int nfcmrvl_fw_dnld_init(struct nfcmrvl_private *priv);
+void nfcmrvl_fw_dnld_deinit(struct nfcmrvl_private *priv);
+void nfcmrvl_fw_dnld_abort(struct nfcmrvl_private *priv);
+int nfcmrvl_fw_dnld_start(struct nci_dev *ndev, const char *firmware_name);
+void nfcmrvl_fw_dnld_recv_frame(struct nfcmrvl_private *priv,
+				struct sk_buff *skb);
+
+#endif

drivers/nfc/nfcmrvl/main.c

@@ -61,9 +61,6 @@ static int nfcmrvl_nci_send(struct nci_dev *ndev, struct sk_buff *skb)
 
 	skb->dev = (void *)ndev;
 
-	if (!test_bit(NFCMRVL_NCI_RUNNING, &priv->flags))
-		return -EBUSY;
-
 	if (priv->config.hci_muxed) {
 		unsigned char *hdr;
 		unsigned char len = skb->len;
@@ -86,11 +83,18 @@ static int nfcmrvl_nci_setup(struct nci_dev *ndev)
 	return 0;
 }
 
+static int nfcmrvl_nci_fw_download(struct nci_dev *ndev,
+				   const char *firmware_name)
+{
+	return nfcmrvl_fw_dnld_start(ndev, firmware_name);
+}
+
 static struct nci_ops nfcmrvl_nci_ops = {
 	.open = nfcmrvl_nci_open,
 	.close = nfcmrvl_nci_close,
 	.send = nfcmrvl_nci_send,
 	.setup = nfcmrvl_nci_setup,
+	.fw_download = nfcmrvl_nci_fw_download,
 };
 
 struct nfcmrvl_private *nfcmrvl_nci_register_dev(void *drv_data,
@@ -143,18 +147,26 @@ struct nfcmrvl_private *nfcmrvl_nci_register_dev(void *drv_data,
 
 	nci_set_drvdata(priv->ndev, priv);
 
-	nfcmrvl_chip_reset(priv);
-
 	rc = nci_register_device(priv->ndev);
 	if (rc) {
 		nfc_err(dev, "nci_register_device failed %d\n", rc);
-		nci_free_device(priv->ndev);
+		goto error_free_dev;
-		goto error;
+	}
+
+	/* Ensure that controller is powered off */
+	nfcmrvl_chip_halt(priv);
+
+	rc = nfcmrvl_fw_dnld_init(priv);
+	if (rc) {
+		nfc_err(dev, "failed to initialize FW download %d\n", rc);
+		goto error_free_dev;
 	}
 
 	nfc_info(dev, "registered with nci successfully\n");
 	return priv;
 
+error_free_dev:
+	nci_free_device(priv->ndev);
 error:
 	kfree(priv);
 	return ERR_PTR(rc);
@@ -165,6 +177,11 @@ void nfcmrvl_nci_unregister_dev(struct nfcmrvl_private *priv)
 {
 	struct nci_dev *ndev = priv->ndev;
 
+	if (priv->ndev->nfc_dev->fw_download_in_progress)
+		nfcmrvl_fw_dnld_abort(priv);
+
+	nfcmrvl_fw_dnld_deinit(priv);
+
 	nci_unregister_device(ndev);
 	nci_free_device(ndev);
 	kfree(priv);
@@ -185,6 +202,11 @@ int nfcmrvl_nci_recv_frame(struct nfcmrvl_private *priv, struct sk_buff *skb)
 		}
 	}
 
+	if (priv->ndev->nfc_dev->fw_download_in_progress) {
+		nfcmrvl_fw_dnld_recv_frame(priv, skb);
+		return 0;
+	}
+
 	if (test_bit(NFCMRVL_NCI_RUNNING, &priv->flags))
 		nci_recv_frame(priv->ndev, skb);
 	else {
@@ -213,6 +235,12 @@ void nfcmrvl_chip_reset(struct nfcmrvl_private *priv)
 		nfc_info(priv->dev, "no reset available on this interface\n");
 }
 
+void nfcmrvl_chip_halt(struct nfcmrvl_private *priv)
+{
+	if (priv->config.reset_n_io)
+		gpio_set_value(priv->config.reset_n_io, 0);
+}
+
 #ifdef CONFIG_OF
 
 int nfcmrvl_parse_dt(struct device_node *node,

drivers/nfc/nfcmrvl/nfcmrvl.h

@@ -1,7 +1,7 @@
 /**
  * Marvell NFC driver
  *
- * Copyright (C) 2014, Marvell International Ltd.
+ * Copyright (C) 2014-2015, Marvell International Ltd.
  *
  * This software file (the "File") is distributed by Marvell International
  * Ltd. under the terms of the GNU General Public License Version 2, June 1991
@@ -21,6 +21,8 @@
 
 #include <linux/platform_data/nfcmrvl.h>
 
+#include "fw_dnld.h"
+
 /* Define private flags: */
 #define NFCMRVL_NCI_RUNNING			1
 
@@ -37,6 +39,8 @@
 */
 
 #define NFCMRVL_PB_BAIL_OUT			0x11
+#define NFCMRVL_PROP_REF_CLOCK			0xF0
+#define NFCMRVL_PROP_SET_HI_CONFIG		0xF1
 
 /*
 ** HCI defines
@@ -52,9 +56,10 @@
 enum nfcmrvl_phy {
 	NFCMRVL_PHY_USB		= 0,
 	NFCMRVL_PHY_UART	= 1,
+	NFCMRVL_PHY_I2C		= 2,
+	NFCMRVL_PHY_SPI		= 3,
 };
 
-
 struct nfcmrvl_private {
 
 	unsigned long flags;
@@ -62,8 +67,15 @@ struct nfcmrvl_private {
 	/* Platform configuration */
 	struct nfcmrvl_platform_data config;
 
+	/* Parent dev */
 	struct nci_dev *ndev;
 
+	/* FW download context */
+	struct nfcmrvl_fw_dnld fw_dnld;
+
+	/* FW download support */
+	bool support_fw_dnld;
+
 	/*
 	** PHY related information
 	*/
@@ -82,6 +94,8 @@ struct nfcmrvl_if_ops {
 	int (*nci_open) (struct nfcmrvl_private *priv);
 	int (*nci_close) (struct nfcmrvl_private *priv);
 	int (*nci_send) (struct nfcmrvl_private *priv, struct sk_buff *skb);
+	void (*nci_update_config)(struct nfcmrvl_private *priv,
+				  const void *param);
 };
 
 void nfcmrvl_nci_unregister_dev(struct nfcmrvl_private *priv);
@@ -93,6 +107,7 @@ struct nfcmrvl_private *nfcmrvl_nci_register_dev(void *drv_data,
 
 
 void nfcmrvl_chip_reset(struct nfcmrvl_private *priv);
+void nfcmrvl_chip_halt(struct nfcmrvl_private *priv);
 
 int nfcmrvl_parse_dt(struct device_node *node,
 		     struct nfcmrvl_platform_data *pdata);

drivers/nfc/nfcmrvl/uart.c

@@ -50,10 +50,21 @@ static int nfcmrvl_uart_nci_send(struct nfcmrvl_private *priv,
 	return nu->ops.send(nu, skb);
 }
 
+static void nfcmrvl_uart_nci_update_config(struct nfcmrvl_private *priv,
+					   const void *param)
+{
+	struct nci_uart *nu = priv->drv_data;
+	const struct nfcmrvl_fw_uart_config *config = param;
+
+	nci_uart_set_config(nu, le32_to_cpu(config->baudrate),
+			    config->flow_control);
+}
+
 static struct nfcmrvl_if_ops uart_ops = {
 	.nci_open = nfcmrvl_uart_nci_open,
 	.nci_close = nfcmrvl_uart_nci_close,
 	.nci_send = nfcmrvl_uart_nci_send,
+	.nci_update_config = nfcmrvl_uart_nci_update_config
 };
 
 #ifdef CONFIG_OF
@@ -132,6 +143,7 @@ static int nfcmrvl_nci_uart_open(struct nci_uart *nu)
 		return PTR_ERR(priv);
 
 	priv->phy = NFCMRVL_PHY_UART;
+	priv->support_fw_dnld = true;
 
 	nu->drv_data = priv;
 	nu->ndev = priv->ndev;

drivers/nfc/nfcmrvl/usb.c

@@ -347,6 +347,8 @@ static int nfcmrvl_probe(struct usb_interface *intf,
 
 	drv_data->priv = priv;
 	drv_data->priv->phy = NFCMRVL_PHY_USB;
+	drv_data->priv->support_fw_dnld = false;
+
 	priv->dev = &drv_data->udev->dev;
 
 	usb_set_intfdata(intf, drv_data);