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linux/drivers/nfc/st-nci/vendor_cmds.c
Christophe Ricard b1fa4dc4ff NFC: st-nci: Add support for proprietary commands 
Add support for proprietary commands useful mainly for
factory testings. Here is a list:

- FACTORY_MODE: Allow to set the driver into a mode where
  no secure element are activated. It does not consider any
  NFC_ATTR_VENDOR_DATA.
- HCI_CLEAR_ALL_PIPES: Allow to execute a HCI clear all pipes
  command. It does not consider any NFC_ATTR_VENDOR_DATA.
- HCI_DM_PUT_DATA: Allow to configure specific CLF registry
  like for example RF trimmings or low level drivers
  configurations (I2C, SPI, SWP).
- HCI_DM_UPDATE_AID: Allow to configure an AID routing into the
  CLF routing table following RF technology, CLF mode or protocol.
- HCI_DM_GET_INFO: Allow to retrieve CLF information.
- HCI_DM_GET_DATA: Allow to retrieve CLF configurable data such as
  low level drivers configurations or RF trimmings.
- HCI_DM_DIRECT_LOAD: Allow to load a firmware into the CLF.
  A complete packet can be more than 8KB.
- HCI_DM_RESET: Allow to run a CLF reset in order to "commit" CLF
  configuration changes without CLF power off.
- HCI_GET_PARAM: Allow to retrieve an HCI CLF parameter (for example
  the white list).
- HCI_DM_FIELD_GENERATOR: Allow to generate different kind of RF
  technology. When using this command to anti-collision is done.
- HCI_LOOPBACK: Allow to echo a command and test the Dh to CLF
  connectivity.
- HCI_DM_VDC_MEASUREMENT_VALUE: Allow to measure the field applied
  on the CLF antenna. A value between 0 and 0x0f is returned. 0 is
  maximum.
- HCI_DM_FWUPD_START: Allow to put CLF into firmware update mode.
  It is a specific CLF command as there is no GPIO for this.
- HCI_DM_FWUPD_END:  Allow to complete firmware update.
- HCI_DM_VDC_VALUE_COMPARISON: Allow to compare the field applied
  on the CLF antenna to a reference value.
- MANUFACTURER_SPECIFIC: Allow to retrieve manufacturer specific data
  received during a NCI_CORE_INIT_CMD.

Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2015-10-27 03:55:01 +01:00

517 lines
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/*
* Proprietary commands extension for STMicroelectronics NFC NCI Chip
*
* Copyright (C) 2014-2015 STMicroelectronics SAS. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include <net/genetlink.h>
#include <linux/module.h>
#include <linux/nfc.h>
#include <linux/delay.h>
#include <net/nfc/nci_core.h>
#include "st-nci.h"
#define ST_NCI_HCI_DM_GETDATA 0x10
#define ST_NCI_HCI_DM_PUTDATA 0x11
#define ST_NCI_HCI_DM_LOAD 0x12
#define ST_NCI_HCI_DM_GETINFO 0x13
#define ST_NCI_HCI_DM_FWUPD_START 0x14
#define ST_NCI_HCI_DM_FWUPD_STOP 0x15
#define ST_NCI_HCI_DM_UPDATE_AID 0x20
#define ST_NCI_HCI_DM_RESET 0x3e
#define ST_NCI_HCI_DM_FIELD_GENERATOR 0x32
#define ST_NCI_HCI_DM_VDC_MEASUREMENT_VALUE 0x33
#define ST_NCI_HCI_DM_VDC_VALUE_COMPARISON 0x34
#define ST_NCI_FACTORY_MODE_ON 1
#define ST_NCI_FACTORY_MODE_OFF 0
#define ST_NCI_EVT_POST_DATA 0x02
struct get_param_data {
u8 gate;
u8 data;
} __packed;
static int st_nci_factory_mode(struct nfc_dev *dev, void *data,
size_t data_len)
{
struct nci_dev *ndev = nfc_get_drvdata(dev);
struct st_nci_info *info = nci_get_drvdata(ndev);
if (data_len != 1)
return -EINVAL;
pr_debug("factory mode: %x\n", ((u8 *)data)[0]);
switch (((u8 *)data)[0]) {
case ST_NCI_FACTORY_MODE_ON:
test_and_set_bit(ST_NCI_FACTORY_MODE, &info->flags);
break;
case ST_NCI_FACTORY_MODE_OFF:
clear_bit(ST_NCI_FACTORY_MODE, &info->flags);
break;
default:
return -EINVAL;
}
return 0;
}
static int st_nci_hci_clear_all_pipes(struct nfc_dev *dev, void *data,
size_t data_len)
{
struct nci_dev *ndev = nfc_get_drvdata(dev);
return nci_hci_clear_all_pipes(ndev);
}
static int st_nci_hci_dm_put_data(struct nfc_dev *dev, void *data,
size_t data_len)
{
struct nci_dev *ndev = nfc_get_drvdata(dev);
return nci_hci_send_cmd(ndev, ST_NCI_DEVICE_MGNT_GATE,
ST_NCI_HCI_DM_PUTDATA, data,
data_len, NULL);
}
static int st_nci_hci_dm_update_aid(struct nfc_dev *dev, void *data,
size_t data_len)
{
struct nci_dev *ndev = nfc_get_drvdata(dev);
return nci_hci_send_cmd(ndev, ST_NCI_DEVICE_MGNT_GATE,
ST_NCI_HCI_DM_UPDATE_AID, data, data_len, NULL);
}
static int st_nci_hci_dm_get_info(struct nfc_dev *dev, void *data,
size_t data_len)
{
int r;
struct sk_buff *msg, *skb;
struct nci_dev *ndev = nfc_get_drvdata(dev);
r = nci_hci_send_cmd(ndev, ST_NCI_DEVICE_MGNT_GATE, ST_NCI_HCI_DM_GETINFO,
data, data_len, &skb);
if (r)
goto exit;
msg = nfc_vendor_cmd_alloc_reply_skb(dev, ST_NCI_VENDOR_OUI,
HCI_DM_GET_INFO, skb->len);
if (!msg) {
r = -ENOMEM;
goto free_skb;
}
if (nla_put(msg, NFC_ATTR_VENDOR_DATA, skb->len, skb->data)) {
kfree_skb(msg);
r = -ENOBUFS;
goto free_skb;
}
r = nfc_vendor_cmd_reply(msg);
free_skb:
kfree_skb(skb);
exit:
return r;
}
static int st_nci_hci_dm_get_data(struct nfc_dev *dev, void *data,
size_t data_len)
{
int r;
struct sk_buff *msg, *skb;
struct nci_dev *ndev = nfc_get_drvdata(dev);
r = nci_hci_send_cmd(ndev, ST_NCI_DEVICE_MGNT_GATE, ST_NCI_HCI_DM_GETDATA,
data, data_len, &skb);
if (r)
goto exit;
msg = nfc_vendor_cmd_alloc_reply_skb(dev, ST_NCI_VENDOR_OUI,
HCI_DM_GET_DATA, skb->len);
if (!msg) {
r = -ENOMEM;
goto free_skb;
}
if (nla_put(msg, NFC_ATTR_VENDOR_DATA, skb->len, skb->data)) {
kfree_skb(msg);
r = -ENOBUFS;
goto free_skb;
}
r = nfc_vendor_cmd_reply(msg);
free_skb:
kfree_skb(skb);
exit:
return r;
}
static int st_nci_hci_dm_fwupd_start(struct nfc_dev *dev, void *data,
size_t data_len)
{
int r;
struct nci_dev *ndev = nfc_get_drvdata(dev);
dev->fw_download_in_progress = true;
r = nci_hci_send_cmd(ndev, ST_NCI_DEVICE_MGNT_GATE,
ST_NCI_HCI_DM_FWUPD_START, data, data_len, NULL);
if (r)
dev->fw_download_in_progress = false;
return r;
}
static int st_nci_hci_dm_fwupd_end(struct nfc_dev *dev, void *data,
size_t data_len)
{
struct nci_dev *ndev = nfc_get_drvdata(dev);
return nci_hci_send_cmd(ndev, ST_NCI_DEVICE_MGNT_GATE,
ST_NCI_HCI_DM_FWUPD_STOP, data, data_len, NULL);
}
static int st_nci_hci_dm_direct_load(struct nfc_dev *dev, void *data,
size_t data_len)
{
struct nci_dev *ndev = nfc_get_drvdata(dev);
if (dev->fw_download_in_progress) {
dev->fw_download_in_progress = false;
return nci_hci_send_cmd(ndev, ST_NCI_DEVICE_MGNT_GATE,
ST_NCI_HCI_DM_LOAD, data, data_len, NULL);
}
return -EPROTO;
}
static int st_nci_hci_dm_reset(struct nfc_dev *dev, void *data,
size_t data_len)
{
struct nci_dev *ndev = nfc_get_drvdata(dev);
nci_hci_send_cmd(ndev, ST_NCI_DEVICE_MGNT_GATE,
ST_NCI_HCI_DM_RESET, data, data_len, NULL);
msleep(200);
return 0;
}
static int st_nci_hci_get_param(struct nfc_dev *dev, void *data,
size_t data_len)
{
int r;
struct sk_buff *msg, *skb;
struct nci_dev *ndev = nfc_get_drvdata(dev);
struct get_param_data *param = (struct get_param_data *)data;
if (data_len < sizeof(struct get_param_data))
return -EPROTO;
r = nci_hci_get_param(ndev, param->gate, param->data, &skb);
if (r)
goto exit;
msg = nfc_vendor_cmd_alloc_reply_skb(dev, ST_NCI_VENDOR_OUI,
HCI_GET_PARAM, skb->len);
if (!msg) {
r = -ENOMEM;
goto free_skb;
}
if (nla_put(msg, NFC_ATTR_VENDOR_DATA, skb->len, skb->data)) {
kfree_skb(msg);
r = -ENOBUFS;
goto free_skb;
}
r = nfc_vendor_cmd_reply(msg);
free_skb:
kfree_skb(skb);
exit:
return r;
}
static int st_nci_hci_dm_field_generator(struct nfc_dev *dev, void *data,
size_t data_len)
{
struct nci_dev *ndev = nfc_get_drvdata(dev);
return nci_hci_send_cmd(ndev, ST_NCI_DEVICE_MGNT_GATE,
ST_NCI_HCI_DM_FIELD_GENERATOR, data, data_len, NULL);
}
static int st_nci_hci_dm_vdc_measurement_value(struct nfc_dev *dev, void *data,
size_t data_len)
{
int r;
struct sk_buff *msg, *skb;
struct nci_dev *ndev = nfc_get_drvdata(dev);
if (data_len != 4)
return -EPROTO;
r = nci_hci_send_cmd(ndev, ST_NCI_DEVICE_MGNT_GATE,
ST_NCI_HCI_DM_VDC_MEASUREMENT_VALUE,
data, data_len, &skb);
if (r)
goto exit;
msg = nfc_vendor_cmd_alloc_reply_skb(dev, ST_NCI_VENDOR_OUI,
HCI_DM_VDC_MEASUREMENT_VALUE, skb->len);
if (!msg) {
r = -ENOMEM;
goto free_skb;
}
if (nla_put(msg, NFC_ATTR_VENDOR_DATA, skb->len, skb->data)) {
kfree_skb(msg);
r = -ENOBUFS;
goto free_skb;
}
r = nfc_vendor_cmd_reply(msg);
free_skb:
kfree_skb(skb);
exit:
return r;
}
static int st_nci_hci_dm_vdc_value_comparison(struct nfc_dev *dev, void *data,
size_t data_len)
{
int r;
struct sk_buff *msg, *skb;
struct nci_dev *ndev = nfc_get_drvdata(dev);
if (data_len != 2)
return -EPROTO;
r = nci_hci_send_cmd(ndev, ST_NCI_DEVICE_MGNT_GATE,
ST_NCI_HCI_DM_VDC_VALUE_COMPARISON,
data, data_len, &skb);
if (r)
goto exit;
msg = nfc_vendor_cmd_alloc_reply_skb(dev, ST_NCI_VENDOR_OUI,
HCI_DM_VDC_VALUE_COMPARISON, skb->len);
if (!msg) {
r = -ENOMEM;
goto free_skb;
}
if (nla_put(msg, NFC_ATTR_VENDOR_DATA, skb->len, skb->data)) {
kfree_skb(msg);
r = -ENOBUFS;
goto free_skb;
}
r = nfc_vendor_cmd_reply(msg);
free_skb:
kfree_skb(skb);
exit:
return r;
}
void st_nci_hci_loopback_event_received(struct nci_dev *ndev, u8 event,
struct sk_buff *skb)
{
struct st_nci_info *info = nci_get_drvdata(ndev);
switch (event) {
case ST_NCI_EVT_POST_DATA:
info->vendor_info.rx_skb = skb;
break;
default:
nfc_err(&ndev->nfc_dev->dev, "Unexpected event on loopback gate\n");
}
complete(&info->vendor_info.req_completion);
}
EXPORT_SYMBOL(st_nci_hci_loopback_event_received);
static int st_nci_hci_loopback(struct nfc_dev *dev, void *data,
size_t data_len)
{
int r;
struct sk_buff *msg;
struct nci_dev *ndev = nfc_get_drvdata(dev);
struct st_nci_info *info = nci_get_drvdata(ndev);
if (data_len <= 0)
return -EPROTO;
reinit_completion(&info->vendor_info.req_completion);
info->vendor_info.rx_skb = NULL;
r = nci_hci_send_event(ndev, NCI_HCI_LOOPBACK_GATE,
ST_NCI_EVT_POST_DATA, data, data_len);
if (r != data_len) {
r = -EPROTO;
goto exit;
}
wait_for_completion_interruptible(&info->vendor_info.req_completion);
if (!info->vendor_info.rx_skb ||
info->vendor_info.rx_skb->len != data_len) {
r = -EPROTO;
goto exit;
}
msg = nfc_vendor_cmd_alloc_reply_skb(ndev->nfc_dev,
ST_NCI_VENDOR_OUI,
HCI_LOOPBACK,
info->vendor_info.rx_skb->len);
if (!msg) {
r = -ENOMEM;
goto free_skb;
}
if (nla_put(msg, NFC_ATTR_VENDOR_DATA, info->vendor_info.rx_skb->len,
info->vendor_info.rx_skb->data)) {
kfree_skb(msg);
r = -ENOBUFS;
goto free_skb;
}
r = nfc_vendor_cmd_reply(msg);
free_skb:
kfree_skb(info->vendor_info.rx_skb);
exit:
return r;
}
static int st_nci_manufacturer_specific(struct nfc_dev *dev, void *data,
size_t data_len)
{
struct sk_buff *msg;
struct nci_dev *ndev = nfc_get_drvdata(dev);
msg = nfc_vendor_cmd_alloc_reply_skb(dev, ST_NCI_VENDOR_OUI,
MANUFACTURER_SPECIFIC,
sizeof(ndev->manufact_specific_info));
if (!msg)
return -ENOMEM;
if (nla_put(msg, NFC_ATTR_VENDOR_DATA, sizeof(ndev->manufact_specific_info),
&ndev->manufact_specific_info)) {
kfree_skb(msg);
return -ENOBUFS;
}
return nfc_vendor_cmd_reply(msg);
}
static struct nfc_vendor_cmd st_nci_vendor_cmds[] = {
{
.vendor_id = ST_NCI_VENDOR_OUI,
.subcmd = FACTORY_MODE,
.doit = st_nci_factory_mode,
},
{
.vendor_id = ST_NCI_VENDOR_OUI,
.subcmd = HCI_CLEAR_ALL_PIPES,
.doit = st_nci_hci_clear_all_pipes,
},
{
.vendor_id = ST_NCI_VENDOR_OUI,
.subcmd = HCI_DM_PUT_DATA,
.doit = st_nci_hci_dm_put_data,
},
{
.vendor_id = ST_NCI_VENDOR_OUI,
.subcmd = HCI_DM_UPDATE_AID,
.doit = st_nci_hci_dm_update_aid,
},
{
.vendor_id = ST_NCI_VENDOR_OUI,
.subcmd = HCI_DM_GET_INFO,
.doit = st_nci_hci_dm_get_info,
},
{
.vendor_id = ST_NCI_VENDOR_OUI,
.subcmd = HCI_DM_GET_DATA,
.doit = st_nci_hci_dm_get_data,
},
{
.vendor_id = ST_NCI_VENDOR_OUI,
.subcmd = HCI_DM_DIRECT_LOAD,
.doit = st_nci_hci_dm_direct_load,
},
{
.vendor_id = ST_NCI_VENDOR_OUI,
.subcmd = HCI_DM_RESET,
.doit = st_nci_hci_dm_reset,
},
{
.vendor_id = ST_NCI_VENDOR_OUI,
.subcmd = HCI_GET_PARAM,
.doit = st_nci_hci_get_param,
},
{
.vendor_id = ST_NCI_VENDOR_OUI,
.subcmd = HCI_DM_FIELD_GENERATOR,
.doit = st_nci_hci_dm_field_generator,
},
{
.vendor_id = ST_NCI_VENDOR_OUI,
.subcmd = HCI_DM_FWUPD_START,
.doit = st_nci_hci_dm_fwupd_start,
},
{
.vendor_id = ST_NCI_VENDOR_OUI,
.subcmd = HCI_DM_FWUPD_END,
.doit = st_nci_hci_dm_fwupd_end,
},
{
.vendor_id = ST_NCI_VENDOR_OUI,
.subcmd = HCI_LOOPBACK,
.doit = st_nci_hci_loopback,
},
{
.vendor_id = ST_NCI_VENDOR_OUI,
.subcmd = HCI_DM_VDC_MEASUREMENT_VALUE,
.doit = st_nci_hci_dm_vdc_measurement_value,
},
{
.vendor_id = ST_NCI_VENDOR_OUI,
.subcmd = HCI_DM_VDC_VALUE_COMPARISON,
.doit = st_nci_hci_dm_vdc_value_comparison,
},
{
.vendor_id = ST_NCI_VENDOR_OUI,
.subcmd = MANUFACTURER_SPECIFIC,
.doit = st_nci_manufacturer_specific,
},
};
int st_nci_vendor_cmds_init(struct nci_dev *ndev)
{
struct st_nci_info *info = nci_get_drvdata(ndev);
init_completion(&info->vendor_info.req_completion);
return nfc_set_vendor_cmds(ndev->nfc_dev, st_nci_vendor_cmds,
sizeof(st_nci_vendor_cmds));
}
EXPORT_SYMBOL(st_nci_vendor_cmds_init);
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