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>hifive-unleashed-5.1
Thierry Escande
Samuel Ortiz
parent
9f7b57f28c
commit
7227c0216d
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@ -75,6 +75,11 @@ static u8 ack_frame[PORT100_FRAME_ACK_SIZE] = {
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#define PORT100_CMD_IN_SET_PROTOCOL 0x02
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#define PORT100_CMD_IN_COMM_RF 0x04
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#define PORT100_CMD_TG_SET_RF 0x40
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#define PORT100_CMD_TG_SET_PROTOCOL 0x42
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#define PORT100_CMD_TG_SET_RF_OFF 0x46
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#define PORT100_CMD_TG_COMM_RF 0x48
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#define PORT100_CMD_SWITCH_RF 0x06
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#define PORT100_CMD_RESPONSE(cmd) (cmd + 1)
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@ -87,6 +92,9 @@ static u8 ack_frame[PORT100_FRAME_ACK_SIZE] = {
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#define PORT100_CMD_STATUS_OK 0x00
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#define PORT100_CMD_STATUS_TIMEOUT 0x80
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#define PORT100_MDAA_TGT_HAS_BEEN_ACTIVATED_MASK 0x01
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#define PORT100_MDAA_TGT_WAS_ACTIVATED_MASK 0x02
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struct port100;
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typedef void (*port100_send_async_complete_t)(struct port100 *dev, void *arg,
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@ -133,6 +141,41 @@ static const struct port100_in_rf_setting in_rf_settings[] = {
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},
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};
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/**
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* Setting sets structure for tg_set_rf command
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*
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* @tg_set_number: Represents the entry index in the port-100 RF Base Table.
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* This table contains multiple RF setting sets required for RF
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* communication. this field is used for both send and receive
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* settings.
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*
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* @tg_comm_type: Sets the communication type to be used to send and receive
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* data.
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*/
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struct port100_tg_rf_setting {
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u8 tg_set_number;
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u8 tg_comm_type;
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} __packed;
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#define PORT100_COMM_TYPE_TG_106A 0x0B
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#define PORT100_COMM_TYPE_TG_212F 0x0C
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#define PORT100_COMM_TYPE_TG_424F 0x0D
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static const struct port100_tg_rf_setting tg_rf_settings[] = {
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[NFC_DIGITAL_RF_TECH_106A] = {
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.tg_set_number = 8,
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.tg_comm_type = PORT100_COMM_TYPE_TG_106A,
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},
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[NFC_DIGITAL_RF_TECH_212F] = {
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.tg_set_number = 8,
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.tg_comm_type = PORT100_COMM_TYPE_TG_212F,
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},
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[NFC_DIGITAL_RF_TECH_424F] = {
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.tg_set_number = 8,
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.tg_comm_type = PORT100_COMM_TYPE_TG_424F,
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},
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};
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#define PORT100_IN_PROT_INITIAL_GUARD_TIME 0x00
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#define PORT100_IN_PROT_ADD_CRC 0x01
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#define PORT100_IN_PROT_CHECK_CRC 0x02
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@ -156,6 +199,13 @@ static const struct port100_in_rf_setting in_rf_settings[] = {
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#define PORT100_IN_MAX_NUM_PROTOCOLS 19
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#define PORT100_TG_PROT_TU 0x00
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#define PORT100_TG_PROT_RF_OFF 0x01
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#define PORT100_TG_PROT_CRM 0x02
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#define PORT100_TG_PROT_END 0x03
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#define PORT100_TG_MAX_NUM_PROTOCOLS 3
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struct port100_protocol {
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u8 number;
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u8 value;
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@ -282,6 +332,47 @@ in_protocols[][PORT100_IN_MAX_NUM_PROTOCOLS + 1] = {
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},
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};
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static struct port100_protocol
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tg_protocols[][PORT100_TG_MAX_NUM_PROTOCOLS + 1] = {
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[NFC_DIGITAL_FRAMING_NFCA_SHORT] = {
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{ PORT100_TG_PROT_END, 0 },
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},
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[NFC_DIGITAL_FRAMING_NFCA_STANDARD] = {
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{ PORT100_TG_PROT_END, 0 },
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},
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[NFC_DIGITAL_FRAMING_NFCA_STANDARD_WITH_CRC_A] = {
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{ PORT100_TG_PROT_END, 0 },
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},
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[NFC_DIGITAL_FRAMING_NFCA_T1T] = {
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{ PORT100_TG_PROT_END, 0 },
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},
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[NFC_DIGITAL_FRAMING_NFCA_T2T] = {
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{ PORT100_TG_PROT_END, 0 },
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},
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[NFC_DIGITAL_FRAMING_NFCA_NFC_DEP] = {
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{ PORT100_TG_PROT_TU, 1 },
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{ PORT100_TG_PROT_RF_OFF, 0 },
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{ PORT100_TG_PROT_CRM, 7 },
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{ PORT100_TG_PROT_END, 0 },
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},
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[NFC_DIGITAL_FRAMING_NFCF] = {
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{ PORT100_TG_PROT_END, 0 },
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},
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[NFC_DIGITAL_FRAMING_NFCF_T3T] = {
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{ PORT100_TG_PROT_END, 0 },
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},
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[NFC_DIGITAL_FRAMING_NFCF_NFC_DEP] = {
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{ PORT100_TG_PROT_TU, 1 },
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{ PORT100_TG_PROT_RF_OFF, 0 },
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{ PORT100_TG_PROT_CRM, 7 },
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{ PORT100_TG_PROT_END, 0 },
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},
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[NFC_DIGITAL_FRAMING_NFC_DEP_ACTIVATED] = {
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{ PORT100_TG_PROT_RF_OFF, 1 },
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{ PORT100_TG_PROT_END, 0 },
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},
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};
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struct port100 {
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struct nfc_digital_dev *nfc_digital_dev;
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@ -348,6 +439,14 @@ struct port100_tg_comm_rf_cmd {
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u8 data[];
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} __packed;
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struct port100_tg_comm_rf_res {
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u8 comm_type;
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u8 ar_status;
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u8 target_activated;
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__le32 status;
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u8 data[];
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} __packed;
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/* The rule: value + checksum = 0 */
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static inline u8 port100_checksum(u16 value)
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{
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@ -1002,17 +1101,176 @@ static int port100_in_send_cmd(struct nfc_digital_dev *ddev,
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port100_in_comm_rf_complete, cb_arg);
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}
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static int port100_tg_set_rf(struct nfc_digital_dev *ddev, u8 rf)
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{
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struct port100 *dev = nfc_digital_get_drvdata(ddev);
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struct sk_buff *skb;
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struct sk_buff *resp;
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int rc;
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if (rf >= NFC_DIGITAL_RF_TECH_LAST)
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return -EINVAL;
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skb = port100_alloc_skb(dev, sizeof(struct port100_tg_rf_setting));
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if (!skb)
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return -ENOMEM;
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memcpy(skb_put(skb, sizeof(struct port100_tg_rf_setting)),
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&tg_rf_settings[rf],
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sizeof(struct port100_tg_rf_setting));
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resp = port100_send_cmd_sync(dev, PORT100_CMD_TG_SET_RF, skb);
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if (IS_ERR(resp))
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return PTR_ERR(resp);
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rc = resp->data[0];
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dev_kfree_skb(resp);
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return rc;
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}
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static int port100_tg_set_framing(struct nfc_digital_dev *ddev, int param)
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{
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struct port100 *dev = nfc_digital_get_drvdata(ddev);
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struct port100_protocol *protocols;
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struct sk_buff *skb;
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struct sk_buff *resp;
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int rc;
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int num_protocols;
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size_t size;
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if (param >= NFC_DIGITAL_FRAMING_LAST)
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return -EINVAL;
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protocols = tg_protocols[param];
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num_protocols = 0;
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while (protocols[num_protocols].number != PORT100_TG_PROT_END)
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num_protocols++;
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if (!num_protocols)
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return 0;
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size = sizeof(struct port100_protocol) * num_protocols;
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skb = port100_alloc_skb(dev, size);
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if (!skb)
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return -ENOMEM;
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memcpy(skb_put(skb, size), protocols, size);
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resp = port100_send_cmd_sync(dev, PORT100_CMD_TG_SET_PROTOCOL, skb);
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if (IS_ERR(resp))
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return PTR_ERR(resp);
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rc = resp->data[0];
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dev_kfree_skb(resp);
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return rc;
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}
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static int port100_tg_configure_hw(struct nfc_digital_dev *ddev, int type,
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int param)
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{
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return -EOPNOTSUPP;
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if (type == NFC_DIGITAL_CONFIG_RF_TECH)
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return port100_tg_set_rf(ddev, param);
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if (type == NFC_DIGITAL_CONFIG_FRAMING)
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return port100_tg_set_framing(ddev, param);
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return -EINVAL;
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}
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static bool port100_tg_target_activated(struct port100 *dev, u8 tgt_activated)
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{
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u8 mask;
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switch (dev->cmd_type) {
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case PORT100_CMD_TYPE_0:
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mask = PORT100_MDAA_TGT_HAS_BEEN_ACTIVATED_MASK;
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break;
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case PORT100_CMD_TYPE_1:
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mask = PORT100_MDAA_TGT_HAS_BEEN_ACTIVATED_MASK |
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PORT100_MDAA_TGT_WAS_ACTIVATED_MASK;
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break;
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default:
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nfc_err(&dev->interface->dev, "Unknonwn command type.\n");
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return false;
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}
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return ((tgt_activated & mask) == mask);
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}
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static void port100_tg_comm_rf_complete(struct port100 *dev, void *arg,
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struct sk_buff *resp)
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{
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u32 status;
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struct port100_cb_arg *cb_arg = arg;
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nfc_digital_cmd_complete_t cb = cb_arg->complete_cb;
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struct port100_tg_comm_rf_res *hdr;
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if (IS_ERR(resp))
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goto exit;
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hdr = (struct port100_tg_comm_rf_res *)resp->data;
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status = le32_to_cpu(hdr->status);
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if (cb_arg->mdaa &&
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!port100_tg_target_activated(dev, hdr->target_activated)) {
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kfree_skb(resp);
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resp = ERR_PTR(-ETIMEDOUT);
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goto exit;
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}
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skb_pull(resp, sizeof(struct port100_tg_comm_rf_res));
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if (status != PORT100_CMD_STATUS_OK) {
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kfree_skb(resp);
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if (status == PORT100_CMD_STATUS_TIMEOUT)
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resp = ERR_PTR(-ETIMEDOUT);
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else
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resp = ERR_PTR(-EIO);
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}
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exit:
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cb(dev->nfc_digital_dev, cb_arg->complete_arg, resp);
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kfree(cb_arg);
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}
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static int port100_tg_send_cmd(struct nfc_digital_dev *ddev,
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struct sk_buff *skb, u16 timeout,
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nfc_digital_cmd_complete_t cb, void *arg)
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{
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return -EOPNOTSUPP;
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struct port100 *dev = nfc_digital_get_drvdata(ddev);
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struct port100_tg_comm_rf_cmd *hdr;
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struct port100_cb_arg *cb_arg;
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cb_arg = kzalloc(sizeof(struct port100_cb_arg), GFP_KERNEL);
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if (!cb_arg)
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return -ENOMEM;
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cb_arg->complete_cb = cb;
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cb_arg->complete_arg = arg;
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skb_push(skb, sizeof(struct port100_tg_comm_rf_cmd));
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hdr = (struct port100_tg_comm_rf_cmd *)skb->data;
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memset(hdr, 0, sizeof(struct port100_tg_comm_rf_cmd));
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hdr->guard_time = cpu_to_le16(500);
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hdr->send_timeout = cpu_to_le16(0xFFFF);
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hdr->recv_timeout = cpu_to_le16(timeout);
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return port100_send_cmd_async(dev, PORT100_CMD_TG_COMM_RF, skb,
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port100_tg_comm_rf_complete, cb_arg);
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}
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static int port100_listen_mdaa(struct nfc_digital_dev *ddev,
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@ -1020,13 +1278,68 @@ static int port100_listen_mdaa(struct nfc_digital_dev *ddev,
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u16 timeout,
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nfc_digital_cmd_complete_t cb, void *arg)
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{
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return -EOPNOTSUPP;
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struct port100 *dev = nfc_digital_get_drvdata(ddev);
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struct port100_tg_comm_rf_cmd *hdr;
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struct port100_cb_arg *cb_arg;
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struct sk_buff *skb;
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int rc;
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rc = port100_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH,
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NFC_DIGITAL_RF_TECH_106A);
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if (rc)
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return rc;
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rc = port100_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING,
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NFC_DIGITAL_FRAMING_NFCA_NFC_DEP);
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if (rc)
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return rc;
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cb_arg = kzalloc(sizeof(struct port100_cb_arg), GFP_KERNEL);
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if (!cb_arg)
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return -ENOMEM;
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cb_arg->complete_cb = cb;
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cb_arg->complete_arg = arg;
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cb_arg->mdaa = 1;
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skb = port100_alloc_skb(dev, 0);
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if (!skb) {
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kfree(cb_arg);
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return -ENOMEM;
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}
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skb_push(skb, sizeof(struct port100_tg_comm_rf_cmd));
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hdr = (struct port100_tg_comm_rf_cmd *)skb->data;
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memset(hdr, 0, sizeof(struct port100_tg_comm_rf_cmd));
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hdr->guard_time = 0;
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hdr->send_timeout = cpu_to_le16(0xFFFF);
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hdr->mdaa = 1;
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hdr->nfca_param[0] = (params->sens_res >> 8) & 0xFF;
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hdr->nfca_param[1] = params->sens_res & 0xFF;
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memcpy(hdr->nfca_param + 2, params->nfcid1, 3);
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hdr->nfca_param[5] = params->sel_res;
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memcpy(hdr->nfcf_param, params->nfcid2, 8);
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hdr->nfcf_param[16] = (params->sc >> 8) & 0xFF;
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hdr->nfcf_param[17] = params->sc & 0xFF;
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hdr->recv_timeout = cpu_to_le16(timeout);
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return port100_send_cmd_async(dev, PORT100_CMD_TG_COMM_RF, skb,
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port100_tg_comm_rf_complete, cb_arg);
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}
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static int port100_listen(struct nfc_digital_dev *ddev, u16 timeout,
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nfc_digital_cmd_complete_t cb, void *arg)
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{
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return -EOPNOTSUPP;
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struct port100 *dev = nfc_digital_get_drvdata(ddev);
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struct sk_buff *skb;
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skb = port100_alloc_skb(dev, 0);
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if (!skb)
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return -ENOMEM;
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return port100_tg_send_cmd(ddev, skb, timeout, cb, arg);
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}
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static struct nfc_digital_ops port100_digital_ops = {
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