swh:1:snp:c2847dfd741eae21606027cf29250d1ebcd63fb4
Tip revision: 566cf877a1fcb6d6dc0126b076aad062054c2637 authored by Linus Torvalds on 29 January 2017, 22:25:17 UTC
Linux 4.10-rc6
Linux 4.10-rc6
Tip revision: 566cf87
fw_dnld.c
/*
* 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);
if (timer_pending(&priv->ndev->cmd_timer))
del_timer_sync(&priv->ndev->cmd_timer);
if (timer_pending(&priv->fw_dnld.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)
{
/* Discard command timer */
if (timer_pending(&priv->ndev->cmd_timer))
del_timer_sync(&priv->ndev->cmd_timer);
/* Allow next command */
atomic_set(&priv->ndev->cmd_cnt, 1);
/* 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;
}