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NFC: port100: Add initiator mode support 

This patch implements the initiator NFC operations in_configure_hw()
and in_send_cmd(). It also implements the switch_rf() operation.

The initiator mode supports NFC-A technology at 106kbits/s and NFC-F
technologies at 212 and 424kbits/s.

Signed-off-by: Thierry Escande <thierry.escande@linux.intel.com>
Cc: Stephen Tiedemann <stephen.tiedemann@gmail.com>
Tested-by: Cho, Yu-Chen <acho@suse.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Thierry Escande 2013-10-04 12:12:02 +02:00 committed by Samuel Ortiz
parent 0347a6ab30
commit 9f7b57f28c
1 changed files with 363 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

366
drivers/nfc/port100.c
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@ -71,6 +71,12 @@ static u8 ack_frame[PORT100_FRAME_ACK_SIZE] = {
#define PORT100_CMD_GET_COMMAND_TYPE 0x28
#define PORT100_CMD_SET_COMMAND_TYPE 0x2A
#define PORT100_CMD_IN_SET_RF 0x00
#define PORT100_CMD_IN_SET_PROTOCOL 0x02
#define PORT100_CMD_IN_COMM_RF 0x04
#define PORT100_CMD_SWITCH_RF 0x06
#define PORT100_CMD_RESPONSE(cmd) (cmd + 1)
#define PORT100_CMD_TYPE_IS_SUPPORTED(mask, cmd_type) \
@ -78,11 +84,204 @@ static u8 ack_frame[PORT100_FRAME_ACK_SIZE] = {
#define PORT100_CMD_TYPE_0 0
#define PORT100_CMD_TYPE_1 1
#define PORT100_CMD_STATUS_OK 0x00
#define PORT100_CMD_STATUS_TIMEOUT 0x80
struct port100;
typedef void (*port100_send_async_complete_t)(struct port100 *dev, void *arg,
struct sk_buff *resp);
/**
* Setting sets structure for in_set_rf command
*
* @in_*_set_number: Represent the entry indexes in the port-100 RF Base Table.
* This table contains multiple RF setting sets required for RF
* communication.
*
* @in_*_comm_type: Theses fields set the communication type to be used.
*/
struct port100_in_rf_setting {
u8 in_send_set_number;
u8 in_send_comm_type;
u8 in_recv_set_number;
u8 in_recv_comm_type;
} __packed;
#define PORT100_COMM_TYPE_IN_212F 0x01
#define PORT100_COMM_TYPE_IN_424F 0x02
#define PORT100_COMM_TYPE_IN_106A 0x03
static const struct port100_in_rf_setting in_rf_settings[] = {
[NFC_DIGITAL_RF_TECH_212F] = {
.in_send_set_number = 1,
.in_send_comm_type = PORT100_COMM_TYPE_IN_212F,
.in_recv_set_number = 15,
.in_recv_comm_type = PORT100_COMM_TYPE_IN_212F,
},
[NFC_DIGITAL_RF_TECH_424F] = {
.in_send_set_number = 1,
.in_send_comm_type = PORT100_COMM_TYPE_IN_424F,
.in_recv_set_number = 15,
.in_recv_comm_type = PORT100_COMM_TYPE_IN_424F,
},
[NFC_DIGITAL_RF_TECH_106A] = {
.in_send_set_number = 2,
.in_send_comm_type = PORT100_COMM_TYPE_IN_106A,
.in_recv_set_number = 15,
.in_recv_comm_type = PORT100_COMM_TYPE_IN_106A,
},
};
#define PORT100_IN_PROT_INITIAL_GUARD_TIME 0x00
#define PORT100_IN_PROT_ADD_CRC 0x01
#define PORT100_IN_PROT_CHECK_CRC 0x02
#define PORT100_IN_PROT_MULTI_CARD 0x03
#define PORT100_IN_PROT_ADD_PARITY 0x04
#define PORT100_IN_PROT_CHECK_PARITY 0x05
#define PORT100_IN_PROT_BITWISE_AC_RECV_MODE 0x06
#define PORT100_IN_PROT_VALID_BIT_NUMBER 0x07
#define PORT100_IN_PROT_CRYPTO1 0x08
#define PORT100_IN_PROT_ADD_SOF 0x09
#define PORT100_IN_PROT_CHECK_SOF 0x0A
#define PORT100_IN_PROT_ADD_EOF 0x0B
#define PORT100_IN_PROT_CHECK_EOF 0x0C
#define PORT100_IN_PROT_DEAF_TIME 0x0E
#define PORT100_IN_PROT_CRM 0x0F
#define PORT100_IN_PROT_CRM_MIN_LEN 0x10
#define PORT100_IN_PROT_T1_TAG_FRAME 0x11
#define PORT100_IN_PROT_RFCA 0x12
#define PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR 0x13
#define PORT100_IN_PROT_END 0x14
#define PORT100_IN_MAX_NUM_PROTOCOLS 19
struct port100_protocol {
u8 number;
u8 value;
} __packed;
static struct port100_protocol
in_protocols[][PORT100_IN_MAX_NUM_PROTOCOLS + 1] = {
[NFC_DIGITAL_FRAMING_NFCA_SHORT] = {
{ PORT100_IN_PROT_INITIAL_GUARD_TIME, 6 },
{ PORT100_IN_PROT_ADD_CRC, 0 },
{ PORT100_IN_PROT_CHECK_CRC, 0 },
{ PORT100_IN_PROT_MULTI_CARD, 0 },
{ PORT100_IN_PROT_ADD_PARITY, 0 },
{ PORT100_IN_PROT_CHECK_PARITY, 1 },
{ PORT100_IN_PROT_BITWISE_AC_RECV_MODE, 0 },
{ PORT100_IN_PROT_VALID_BIT_NUMBER, 7 },
{ PORT100_IN_PROT_CRYPTO1, 0 },
{ PORT100_IN_PROT_ADD_SOF, 0 },
{ PORT100_IN_PROT_CHECK_SOF, 0 },
{ PORT100_IN_PROT_ADD_EOF, 0 },
{ PORT100_IN_PROT_CHECK_EOF, 0 },
{ PORT100_IN_PROT_DEAF_TIME, 4 },
{ PORT100_IN_PROT_CRM, 0 },
{ PORT100_IN_PROT_CRM_MIN_LEN, 0 },
{ PORT100_IN_PROT_T1_TAG_FRAME, 0 },
{ PORT100_IN_PROT_RFCA, 0 },
{ PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 },
{ PORT100_IN_PROT_END, 0 },
},
[NFC_DIGITAL_FRAMING_NFCA_STANDARD] = {
{ PORT100_IN_PROT_INITIAL_GUARD_TIME, 6 },
{ PORT100_IN_PROT_ADD_CRC, 0 },
{ PORT100_IN_PROT_CHECK_CRC, 0 },
{ PORT100_IN_PROT_MULTI_CARD, 0 },
{ PORT100_IN_PROT_ADD_PARITY, 1 },
{ PORT100_IN_PROT_CHECK_PARITY, 1 },
{ PORT100_IN_PROT_BITWISE_AC_RECV_MODE, 0 },
{ PORT100_IN_PROT_VALID_BIT_NUMBER, 8 },
{ PORT100_IN_PROT_CRYPTO1, 0 },
{ PORT100_IN_PROT_ADD_SOF, 0 },
{ PORT100_IN_PROT_CHECK_SOF, 0 },
{ PORT100_IN_PROT_ADD_EOF, 0 },
{ PORT100_IN_PROT_CHECK_EOF, 0 },
{ PORT100_IN_PROT_DEAF_TIME, 4 },
{ PORT100_IN_PROT_CRM, 0 },
{ PORT100_IN_PROT_CRM_MIN_LEN, 0 },
{ PORT100_IN_PROT_T1_TAG_FRAME, 0 },
{ PORT100_IN_PROT_RFCA, 0 },
{ PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 },
{ PORT100_IN_PROT_END, 0 },
},
[NFC_DIGITAL_FRAMING_NFCA_STANDARD_WITH_CRC_A] = {
{ PORT100_IN_PROT_INITIAL_GUARD_TIME, 6 },
{ PORT100_IN_PROT_ADD_CRC, 1 },
{ PORT100_IN_PROT_CHECK_CRC, 1 },
{ PORT100_IN_PROT_MULTI_CARD, 0 },
{ PORT100_IN_PROT_ADD_PARITY, 1 },
{ PORT100_IN_PROT_CHECK_PARITY, 1 },
{ PORT100_IN_PROT_BITWISE_AC_RECV_MODE, 0 },
{ PORT100_IN_PROT_VALID_BIT_NUMBER, 8 },
{ PORT100_IN_PROT_CRYPTO1, 0 },
{ PORT100_IN_PROT_ADD_SOF, 0 },
{ PORT100_IN_PROT_CHECK_SOF, 0 },
{ PORT100_IN_PROT_ADD_EOF, 0 },
{ PORT100_IN_PROT_CHECK_EOF, 0 },
{ PORT100_IN_PROT_DEAF_TIME, 4 },
{ PORT100_IN_PROT_CRM, 0 },
{ PORT100_IN_PROT_CRM_MIN_LEN, 0 },
{ PORT100_IN_PROT_T1_TAG_FRAME, 0 },
{ PORT100_IN_PROT_RFCA, 0 },
{ PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 },
{ PORT100_IN_PROT_END, 0 },
},
[NFC_DIGITAL_FRAMING_NFCA_T1T] = {
/* nfc_digital_framing_nfca_short */
{ PORT100_IN_PROT_ADD_CRC, 2 },
{ PORT100_IN_PROT_CHECK_CRC, 2 },
{ PORT100_IN_PROT_VALID_BIT_NUMBER, 8 },
{ PORT100_IN_PROT_T1_TAG_FRAME, 2 },
{ PORT100_IN_PROT_END, 0 },
},
[NFC_DIGITAL_FRAMING_NFCA_T2T] = {
/* nfc_digital_framing_nfca_standard */
{ PORT100_IN_PROT_ADD_CRC, 1 },
{ PORT100_IN_PROT_CHECK_CRC, 0 },
{ PORT100_IN_PROT_END, 0 },
},
[NFC_DIGITAL_FRAMING_NFCA_NFC_DEP] = {
/* nfc_digital_framing_nfca_standard */
{ PORT100_IN_PROT_END, 0 },
},
[NFC_DIGITAL_FRAMING_NFCF] = {
{ PORT100_IN_PROT_INITIAL_GUARD_TIME, 18 },
{ PORT100_IN_PROT_ADD_CRC, 1 },
{ PORT100_IN_PROT_CHECK_CRC, 1 },
{ PORT100_IN_PROT_MULTI_CARD, 0 },
{ PORT100_IN_PROT_ADD_PARITY, 0 },
{ PORT100_IN_PROT_CHECK_PARITY, 0 },
{ PORT100_IN_PROT_BITWISE_AC_RECV_MODE, 0 },
{ PORT100_IN_PROT_VALID_BIT_NUMBER, 8 },
{ PORT100_IN_PROT_CRYPTO1, 0 },
{ PORT100_IN_PROT_ADD_SOF, 0 },
{ PORT100_IN_PROT_CHECK_SOF, 0 },
{ PORT100_IN_PROT_ADD_EOF, 0 },
{ PORT100_IN_PROT_CHECK_EOF, 0 },
{ PORT100_IN_PROT_DEAF_TIME, 4 },
{ PORT100_IN_PROT_CRM, 0 },
{ PORT100_IN_PROT_CRM_MIN_LEN, 0 },
{ PORT100_IN_PROT_T1_TAG_FRAME, 0 },
{ PORT100_IN_PROT_RFCA, 0 },
{ PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 },
{ PORT100_IN_PROT_END, 0 },
},
[NFC_DIGITAL_FRAMING_NFCF_T3T] = {
/* nfc_digital_framing_nfcf */
{ PORT100_IN_PROT_END, 0 },
},
[NFC_DIGITAL_FRAMING_NFCF_NFC_DEP] = {
/* nfc_digital_framing_nfcf */
{ PORT100_IN_PROT_END, 0 },
},
[NFC_DIGITAL_FRAMING_NFC_DEP_ACTIVATED] = {
{ PORT100_IN_PROT_END, 0 },
},
};
struct port100 {
struct nfc_digital_dev *nfc_digital_dev;
@ -626,20 +825,181 @@ static u16 port100_get_firmware_version(struct port100 *dev)
static int port100_switch_rf(struct nfc_digital_dev *ddev, bool on)
{
return -EOPNOTSUPP;
struct port100 *dev = nfc_digital_get_drvdata(ddev);
struct sk_buff *skb, *resp;
skb = port100_alloc_skb(dev, 1);
if (!skb)
return -ENOMEM;
*skb_put(skb, 1) = on ? 1 : 0;
resp = port100_send_cmd_sync(dev, PORT100_CMD_SWITCH_RF, skb);
if (IS_ERR(resp))
return PTR_ERR(resp);
dev_kfree_skb(resp);
return 0;
}
static int port100_in_set_rf(struct nfc_digital_dev *ddev, u8 rf)
{
struct port100 *dev = nfc_digital_get_drvdata(ddev);
struct sk_buff *skb;
struct sk_buff *resp;
int rc;
if (rf >= NFC_DIGITAL_RF_TECH_LAST)
return -EINVAL;
skb = port100_alloc_skb(dev, sizeof(struct port100_in_rf_setting));
if (!skb)
return -ENOMEM;
memcpy(skb_put(skb, sizeof(struct port100_in_rf_setting)),
&in_rf_settings[rf],
sizeof(struct port100_in_rf_setting));
resp = port100_send_cmd_sync(dev, PORT100_CMD_IN_SET_RF, skb);
if (IS_ERR(resp))
return PTR_ERR(resp);
rc = resp->data[0];
dev_kfree_skb(resp);
return rc;
}
static int port100_in_set_framing(struct nfc_digital_dev *ddev, int param)
{
struct port100 *dev = nfc_digital_get_drvdata(ddev);
struct port100_protocol *protocols;
struct sk_buff *skb;
struct sk_buff *resp;
int num_protocols;
size_t size;
int rc;
if (param >= NFC_DIGITAL_FRAMING_LAST)
return -EINVAL;
protocols = in_protocols[param];
num_protocols = 0;
while (protocols[num_protocols].number != PORT100_IN_PROT_END)
num_protocols++;
if (!num_protocols)
return 0;
size = sizeof(struct port100_protocol) * num_protocols;
skb = port100_alloc_skb(dev, size);
if (!skb)
return -ENOMEM;
memcpy(skb_put(skb, size), protocols, size);
resp = port100_send_cmd_sync(dev, PORT100_CMD_IN_SET_PROTOCOL, skb);
if (IS_ERR(resp))
return PTR_ERR(resp);
rc = resp->data[0];
dev_kfree_skb(resp);
return rc;
}
static int port100_in_configure_hw(struct nfc_digital_dev *ddev, int type,
int param)
{
return -EOPNOTSUPP;
if (type == NFC_DIGITAL_CONFIG_RF_TECH)
return port100_in_set_rf(ddev, param);
if (type == NFC_DIGITAL_CONFIG_FRAMING)
return port100_in_set_framing(ddev, param);
return -EINVAL;
}
static void port100_in_comm_rf_complete(struct port100 *dev, void *arg,
struct sk_buff *resp)
{
struct port100_cb_arg *cb_arg = arg;
nfc_digital_cmd_complete_t cb = cb_arg->complete_cb;
u32 status;
int rc;
if (IS_ERR(resp)) {
rc = PTR_ERR(resp);
goto exit;
}
if (resp->len < 4) {
nfc_err(&dev->interface->dev,
"Invalid packet length received.\n");
rc = -EIO;
goto error;
}
status = le32_to_cpu(*(__le32 *)resp->data);
skb_pull(resp, sizeof(u32));
if (status == PORT100_CMD_STATUS_TIMEOUT) {
rc = -ETIMEDOUT;
goto error;
}
if (status != PORT100_CMD_STATUS_OK) {
nfc_err(&dev->interface->dev,
"in_comm_rf failed with status 0x%08x\n", status);
rc = -EIO;
goto error;
}
/* Remove collision bits byte */
skb_pull(resp, 1);
goto exit;
error:
kfree_skb(resp);
resp = ERR_PTR(rc);
exit:
cb(dev->nfc_digital_dev, cb_arg->complete_arg, resp);
kfree(cb_arg);
}
static int port100_in_send_cmd(struct nfc_digital_dev *ddev,
struct sk_buff *skb, u16 _timeout,
nfc_digital_cmd_complete_t cb, void *arg)
{
return -EOPNOTSUPP;
struct port100 *dev = nfc_digital_get_drvdata(ddev);
struct port100_cb_arg *cb_arg;
__le16 timeout;
cb_arg = kzalloc(sizeof(struct port100_cb_arg), GFP_KERNEL);
if (!cb_arg)
return -ENOMEM;
cb_arg->complete_cb = cb;
cb_arg->complete_arg = arg;
timeout = cpu_to_le16(_timeout * 10);
memcpy(skb_push(skb, sizeof(__le16)), &timeout, sizeof(__le16));
return port100_send_cmd_async(dev, PORT100_CMD_IN_COMM_RF, skb,
port100_in_comm_rf_complete, cb_arg);
}
static int port100_tg_configure_hw(struct nfc_digital_dev *ddev, int type,