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NFC: port100: Add target mode support 

This implements the target NFC digital operations tg_configure_hw(),
tg_listen(), tg_listen_mdaa(), and tg_send_cmd().

The target 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 12:12:03 +02:00 коммит произвёл Samuel Ortiz
Родитель 9f7b57f28c
Коммит 7227c0216d
1 изменённых файлов: 317 добавлений и 4 удалений
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321
drivers/nfc/port100.c
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@ -75,6 +75,11 @@ static u8 ack_frame[PORT100_FRAME_ACK_SIZE] = {
#define PORT100_CMD_IN_SET_PROTOCOL 0x02 #define PORT100_CMD_IN_SET_PROTOCOL 0x02
#define PORT100_CMD_IN_COMM_RF 0x04 #define PORT100_CMD_IN_COMM_RF 0x04
#define PORT100_CMD_TG_SET_RF 0x40
#define PORT100_CMD_TG_SET_PROTOCOL 0x42
#define PORT100_CMD_TG_SET_RF_OFF 0x46
#define PORT100_CMD_TG_COMM_RF 0x48
#define PORT100_CMD_SWITCH_RF 0x06 #define PORT100_CMD_SWITCH_RF 0x06
#define PORT100_CMD_RESPONSE(cmd) (cmd + 1) #define PORT100_CMD_RESPONSE(cmd) (cmd + 1)
@ -87,6 +92,9 @@ static u8 ack_frame[PORT100_FRAME_ACK_SIZE] = {
#define PORT100_CMD_STATUS_OK 0x00 #define PORT100_CMD_STATUS_OK 0x00
#define PORT100_CMD_STATUS_TIMEOUT 0x80 #define PORT100_CMD_STATUS_TIMEOUT 0x80
#define PORT100_MDAA_TGT_HAS_BEEN_ACTIVATED_MASK 0x01
#define PORT100_MDAA_TGT_WAS_ACTIVATED_MASK 0x02
struct port100; struct port100;
typedef void (*port100_send_async_complete_t)(struct port100 *dev, void *arg, typedef void (*port100_send_async_complete_t)(struct port100 *dev, void *arg,
@ -133,6 +141,41 @@ static const struct port100_in_rf_setting in_rf_settings[] = {
}, },
}; };
/**
* Setting sets structure for tg_set_rf command
*
* @tg_set_number: Represents the entry index in the port-100 RF Base Table.
* This table contains multiple RF setting sets required for RF
* communication. this field is used for both send and receive
* settings.
*
* @tg_comm_type: Sets the communication type to be used to send and receive
* data.
*/
struct port100_tg_rf_setting {
u8 tg_set_number;
u8 tg_comm_type;
} __packed;
#define PORT100_COMM_TYPE_TG_106A 0x0B
#define PORT100_COMM_TYPE_TG_212F 0x0C
#define PORT100_COMM_TYPE_TG_424F 0x0D
static const struct port100_tg_rf_setting tg_rf_settings[] = {
[NFC_DIGITAL_RF_TECH_106A] = {
.tg_set_number = 8,
.tg_comm_type = PORT100_COMM_TYPE_TG_106A,
},
[NFC_DIGITAL_RF_TECH_212F] = {
.tg_set_number = 8,
.tg_comm_type = PORT100_COMM_TYPE_TG_212F,
},
[NFC_DIGITAL_RF_TECH_424F] = {
.tg_set_number = 8,
.tg_comm_type = PORT100_COMM_TYPE_TG_424F,
},
};
#define PORT100_IN_PROT_INITIAL_GUARD_TIME 0x00 #define PORT100_IN_PROT_INITIAL_GUARD_TIME 0x00
#define PORT100_IN_PROT_ADD_CRC 0x01 #define PORT100_IN_PROT_ADD_CRC 0x01
#define PORT100_IN_PROT_CHECK_CRC 0x02 #define PORT100_IN_PROT_CHECK_CRC 0x02
@ -156,6 +199,13 @@ static const struct port100_in_rf_setting in_rf_settings[] = {
#define PORT100_IN_MAX_NUM_PROTOCOLS 19 #define PORT100_IN_MAX_NUM_PROTOCOLS 19
#define PORT100_TG_PROT_TU 0x00
#define PORT100_TG_PROT_RF_OFF 0x01
#define PORT100_TG_PROT_CRM 0x02
#define PORT100_TG_PROT_END 0x03
#define PORT100_TG_MAX_NUM_PROTOCOLS 3
struct port100_protocol { struct port100_protocol {
u8 number; u8 number;
u8 value; u8 value;
@ -282,6 +332,47 @@ in_protocols[][PORT100_IN_MAX_NUM_PROTOCOLS + 1] = {
}, },
}; };
static struct port100_protocol
tg_protocols[][PORT100_TG_MAX_NUM_PROTOCOLS + 1] = {
[NFC_DIGITAL_FRAMING_NFCA_SHORT] = {
{ PORT100_TG_PROT_END, 0 },
},
[NFC_DIGITAL_FRAMING_NFCA_STANDARD] = {
{ PORT100_TG_PROT_END, 0 },
},
[NFC_DIGITAL_FRAMING_NFCA_STANDARD_WITH_CRC_A] = {
{ PORT100_TG_PROT_END, 0 },
},
[NFC_DIGITAL_FRAMING_NFCA_T1T] = {
{ PORT100_TG_PROT_END, 0 },
},
[NFC_DIGITAL_FRAMING_NFCA_T2T] = {
{ PORT100_TG_PROT_END, 0 },
},
[NFC_DIGITAL_FRAMING_NFCA_NFC_DEP] = {
{ PORT100_TG_PROT_TU, 1 },
{ PORT100_TG_PROT_RF_OFF, 0 },
{ PORT100_TG_PROT_CRM, 7 },
{ PORT100_TG_PROT_END, 0 },
},
[NFC_DIGITAL_FRAMING_NFCF] = {
{ PORT100_TG_PROT_END, 0 },
},
[NFC_DIGITAL_FRAMING_NFCF_T3T] = {
{ PORT100_TG_PROT_END, 0 },
},
[NFC_DIGITAL_FRAMING_NFCF_NFC_DEP] = {
{ PORT100_TG_PROT_TU, 1 },
{ PORT100_TG_PROT_RF_OFF, 0 },
{ PORT100_TG_PROT_CRM, 7 },
{ PORT100_TG_PROT_END, 0 },
},
[NFC_DIGITAL_FRAMING_NFC_DEP_ACTIVATED] = {
{ PORT100_TG_PROT_RF_OFF, 1 },
{ PORT100_TG_PROT_END, 0 },
},
};
struct port100 { struct port100 {
struct nfc_digital_dev *nfc_digital_dev; struct nfc_digital_dev *nfc_digital_dev;
@ -348,6 +439,14 @@ struct port100_tg_comm_rf_cmd {
u8 data[]; u8 data[];
} __packed; } __packed;
struct port100_tg_comm_rf_res {
u8 comm_type;
u8 ar_status;
u8 target_activated;
__le32 status;
u8 data[];
} __packed;
/* The rule: value + checksum = 0 */ /* The rule: value + checksum = 0 */
static inline u8 port100_checksum(u16 value) static inline u8 port100_checksum(u16 value)
{ {
@ -1002,17 +1101,176 @@ static int port100_in_send_cmd(struct nfc_digital_dev *ddev,
port100_in_comm_rf_complete, cb_arg); port100_in_comm_rf_complete, cb_arg);
} }
static int port100_tg_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_tg_rf_setting));
if (!skb)
return -ENOMEM;
memcpy(skb_put(skb, sizeof(struct port100_tg_rf_setting)),
&tg_rf_settings[rf],
sizeof(struct port100_tg_rf_setting));
resp = port100_send_cmd_sync(dev, PORT100_CMD_TG_SET_RF, skb);
if (IS_ERR(resp))
return PTR_ERR(resp);
rc = resp->data[0];
dev_kfree_skb(resp);
return rc;
}
static int port100_tg_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 rc;
int num_protocols;
size_t size;
if (param >= NFC_DIGITAL_FRAMING_LAST)
return -EINVAL;
protocols = tg_protocols[param];
num_protocols = 0;
while (protocols[num_protocols].number != PORT100_TG_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_TG_SET_PROTOCOL, skb);
if (IS_ERR(resp))
return PTR_ERR(resp);
rc = resp->data[0];
dev_kfree_skb(resp);
return rc;
}
static int port100_tg_configure_hw(struct nfc_digital_dev *ddev, int type, static int port100_tg_configure_hw(struct nfc_digital_dev *ddev, int type,
int param) int param)
{ {
return -EOPNOTSUPP; if (type == NFC_DIGITAL_CONFIG_RF_TECH)
return port100_tg_set_rf(ddev, param);
if (type == NFC_DIGITAL_CONFIG_FRAMING)
return port100_tg_set_framing(ddev, param);
return -EINVAL;
}
static bool port100_tg_target_activated(struct port100 *dev, u8 tgt_activated)
{
u8 mask;
switch (dev->cmd_type) {
case PORT100_CMD_TYPE_0:
mask = PORT100_MDAA_TGT_HAS_BEEN_ACTIVATED_MASK;
break;
case PORT100_CMD_TYPE_1:
mask = PORT100_MDAA_TGT_HAS_BEEN_ACTIVATED_MASK |
PORT100_MDAA_TGT_WAS_ACTIVATED_MASK;
break;
default:
nfc_err(&dev->interface->dev, "Unknonwn command type.\n");
return false;
}
return ((tgt_activated & mask) == mask);
}
static void port100_tg_comm_rf_complete(struct port100 *dev, void *arg,
struct sk_buff *resp)
{
u32 status;
struct port100_cb_arg *cb_arg = arg;
nfc_digital_cmd_complete_t cb = cb_arg->complete_cb;
struct port100_tg_comm_rf_res *hdr;
if (IS_ERR(resp))
goto exit;
hdr = (struct port100_tg_comm_rf_res *)resp->data;
status = le32_to_cpu(hdr->status);
if (cb_arg->mdaa &&
!port100_tg_target_activated(dev, hdr->target_activated)) {
kfree_skb(resp);
resp = ERR_PTR(-ETIMEDOUT);
goto exit;
}
skb_pull(resp, sizeof(struct port100_tg_comm_rf_res));
if (status != PORT100_CMD_STATUS_OK) {
kfree_skb(resp);
if (status == PORT100_CMD_STATUS_TIMEOUT)
resp = ERR_PTR(-ETIMEDOUT);
else
resp = ERR_PTR(-EIO);
}
exit:
cb(dev->nfc_digital_dev, cb_arg->complete_arg, resp);
kfree(cb_arg);
} }
static int port100_tg_send_cmd(struct nfc_digital_dev *ddev, static int port100_tg_send_cmd(struct nfc_digital_dev *ddev,
struct sk_buff *skb, u16 timeout, struct sk_buff *skb, u16 timeout,
nfc_digital_cmd_complete_t cb, void *arg) nfc_digital_cmd_complete_t cb, void *arg)
{ {
return -EOPNOTSUPP; struct port100 *dev = nfc_digital_get_drvdata(ddev);
struct port100_tg_comm_rf_cmd *hdr;
struct port100_cb_arg *cb_arg;
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;
skb_push(skb, sizeof(struct port100_tg_comm_rf_cmd));
hdr = (struct port100_tg_comm_rf_cmd *)skb->data;
memset(hdr, 0, sizeof(struct port100_tg_comm_rf_cmd));
hdr->guard_time = cpu_to_le16(500);
hdr->send_timeout = cpu_to_le16(0xFFFF);
hdr->recv_timeout = cpu_to_le16(timeout);
return port100_send_cmd_async(dev, PORT100_CMD_TG_COMM_RF, skb,
port100_tg_comm_rf_complete, cb_arg);
} }
static int port100_listen_mdaa(struct nfc_digital_dev *ddev, static int port100_listen_mdaa(struct nfc_digital_dev *ddev,
@ -1020,13 +1278,68 @@ static int port100_listen_mdaa(struct nfc_digital_dev *ddev,
u16 timeout, u16 timeout,
nfc_digital_cmd_complete_t cb, void *arg) nfc_digital_cmd_complete_t cb, void *arg)
{ {
return -EOPNOTSUPP; struct port100 *dev = nfc_digital_get_drvdata(ddev);
struct port100_tg_comm_rf_cmd *hdr;
struct port100_cb_arg *cb_arg;
struct sk_buff *skb;
int rc;
rc = port100_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH,
NFC_DIGITAL_RF_TECH_106A);
if (rc)
return rc;
rc = port100_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING,
NFC_DIGITAL_FRAMING_NFCA_NFC_DEP);
if (rc)
return rc;
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;
cb_arg->mdaa = 1;
skb = port100_alloc_skb(dev, 0);
if (!skb) {
kfree(cb_arg);
return -ENOMEM;
}
skb_push(skb, sizeof(struct port100_tg_comm_rf_cmd));
hdr = (struct port100_tg_comm_rf_cmd *)skb->data;
memset(hdr, 0, sizeof(struct port100_tg_comm_rf_cmd));
hdr->guard_time = 0;
hdr->send_timeout = cpu_to_le16(0xFFFF);
hdr->mdaa = 1;
hdr->nfca_param[0] = (params->sens_res >> 8) & 0xFF;
hdr->nfca_param[1] = params->sens_res & 0xFF;
memcpy(hdr->nfca_param + 2, params->nfcid1, 3);
hdr->nfca_param[5] = params->sel_res;
memcpy(hdr->nfcf_param, params->nfcid2, 8);
hdr->nfcf_param[16] = (params->sc >> 8) & 0xFF;
hdr->nfcf_param[17] = params->sc & 0xFF;
hdr->recv_timeout = cpu_to_le16(timeout);
return port100_send_cmd_async(dev, PORT100_CMD_TG_COMM_RF, skb,
port100_tg_comm_rf_complete, cb_arg);
} }
static int port100_listen(struct nfc_digital_dev *ddev, u16 timeout, static int port100_listen(struct nfc_digital_dev *ddev, u16 timeout,
nfc_digital_cmd_complete_t cb, void *arg) nfc_digital_cmd_complete_t cb, void *arg)
{ {
return -EOPNOTSUPP; struct port100 *dev = nfc_digital_get_drvdata(ddev);
struct sk_buff *skb;
skb = port100_alloc_skb(dev, 0);
if (!skb)
return -ENOMEM;
return port100_tg_send_cmd(ddev, skb, timeout, cb, arg);
} }
static struct nfc_digital_ops port100_digital_ops = { static struct nfc_digital_ops port100_digital_ops = {