^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright (c) 2013, Intel Corporation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * MEI Library for mei bus nfc device access
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/nfc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include "mei_phy.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) struct mei_nfc_hdr {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) u8 cmd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) u8 status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) u16 req_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) u32 reserved;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) u16 data_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) } __packed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) struct mei_nfc_cmd {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) struct mei_nfc_hdr hdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) u8 sub_command;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) u8 data[];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) } __packed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) struct mei_nfc_reply {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) struct mei_nfc_hdr hdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) u8 sub_command;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) u8 reply_status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) u8 data[];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) } __packed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) struct mei_nfc_if_version {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) u8 radio_version_sw[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) u8 reserved[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) u8 radio_version_hw[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) u8 i2c_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) u8 fw_ivn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) u8 vendor_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) u8 radio_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) } __packed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) struct mei_nfc_connect {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) u8 fw_ivn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) u8 vendor_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) } __packed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) struct mei_nfc_connect_resp {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) u8 fw_ivn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) u8 vendor_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) u16 me_major;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) u16 me_minor;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) u16 me_hotfix;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) u16 me_build;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) } __packed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) #define MEI_NFC_CMD_MAINTENANCE 0x00
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) #define MEI_NFC_CMD_HCI_SEND 0x01
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) #define MEI_NFC_CMD_HCI_RECV 0x02
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) #define MEI_NFC_SUBCMD_CONNECT 0x00
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) #define MEI_NFC_SUBCMD_IF_VERSION 0x01
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) #define MEI_NFC_MAX_READ (MEI_NFC_HEADER_SIZE + MEI_NFC_MAX_HCI_PAYLOAD)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) #define MEI_DUMP_SKB_IN(info, skb) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) do { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) pr_debug("%s:\n", info); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) print_hex_dump_debug("mei in : ", DUMP_PREFIX_OFFSET, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) 16, 1, (skb)->data, (skb)->len, false); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) } while (0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) #define MEI_DUMP_SKB_OUT(info, skb) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) do { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) pr_debug("%s:\n", info); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) print_hex_dump_debug("mei out: ", DUMP_PREFIX_OFFSET, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) 16, 1, (skb)->data, (skb)->len, false); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) } while (0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) #define MEI_DUMP_NFC_HDR(info, _hdr) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) do { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) pr_debug("%s:\n", info); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) pr_debug("cmd=%02d status=%d req_id=%d rsvd=%d size=%d\n", \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) (_hdr)->cmd, (_hdr)->status, (_hdr)->req_id, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) (_hdr)->reserved, (_hdr)->data_size); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) } while (0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) static int mei_nfc_if_version(struct nfc_mei_phy *phy)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) struct mei_nfc_cmd cmd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) struct mei_nfc_reply *reply = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) struct mei_nfc_if_version *version;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) size_t if_version_length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) int bytes_recv, r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) pr_info("%s\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) memset(&cmd, 0, sizeof(struct mei_nfc_cmd));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) cmd.hdr.cmd = MEI_NFC_CMD_MAINTENANCE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) cmd.hdr.data_size = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) cmd.sub_command = MEI_NFC_SUBCMD_IF_VERSION;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) MEI_DUMP_NFC_HDR("version", &cmd.hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) r = mei_cldev_send(phy->cldev, (u8 *)&cmd, sizeof(struct mei_nfc_cmd));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) if (r < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) pr_err("Could not send IF version cmd\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) return r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) /* to be sure on the stack we alloc memory */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) if_version_length = sizeof(struct mei_nfc_reply) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) sizeof(struct mei_nfc_if_version);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) reply = kzalloc(if_version_length, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) if (!reply)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) bytes_recv = mei_cldev_recv(phy->cldev, (u8 *)reply, if_version_length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) if (bytes_recv < 0 || bytes_recv < if_version_length) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) pr_err("Could not read IF version\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) r = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) version = (struct mei_nfc_if_version *)reply->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) phy->fw_ivn = version->fw_ivn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) phy->vendor_id = version->vendor_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) phy->radio_type = version->radio_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) kfree(reply);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) return r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) static int mei_nfc_connect(struct nfc_mei_phy *phy)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) struct mei_nfc_cmd *cmd, *reply;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) struct mei_nfc_connect *connect;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) struct mei_nfc_connect_resp *connect_resp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) size_t connect_length, connect_resp_length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) int bytes_recv, r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) pr_info("%s\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) connect_length = sizeof(struct mei_nfc_cmd) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) sizeof(struct mei_nfc_connect);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) connect_resp_length = sizeof(struct mei_nfc_cmd) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) sizeof(struct mei_nfc_connect_resp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) cmd = kzalloc(connect_length, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) if (!cmd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) connect = (struct mei_nfc_connect *)cmd->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) reply = kzalloc(connect_resp_length, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) if (!reply) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) kfree(cmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) connect_resp = (struct mei_nfc_connect_resp *)reply->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) cmd->hdr.cmd = MEI_NFC_CMD_MAINTENANCE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) cmd->hdr.data_size = 3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) cmd->sub_command = MEI_NFC_SUBCMD_CONNECT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) connect->fw_ivn = phy->fw_ivn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) connect->vendor_id = phy->vendor_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) MEI_DUMP_NFC_HDR("connect request", &cmd->hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) r = mei_cldev_send(phy->cldev, (u8 *)cmd, connect_length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) if (r < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) pr_err("Could not send connect cmd %d\n", r);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) bytes_recv = mei_cldev_recv(phy->cldev, (u8 *)reply,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) connect_resp_length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) if (bytes_recv < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) r = bytes_recv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) pr_err("Could not read connect response %d\n", r);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) MEI_DUMP_NFC_HDR("connect reply", &reply->hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) pr_info("IVN 0x%x Vendor ID 0x%x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) connect_resp->fw_ivn, connect_resp->vendor_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) pr_info("ME FW %d.%d.%d.%d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) connect_resp->me_major, connect_resp->me_minor,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) connect_resp->me_hotfix, connect_resp->me_build);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) r = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) kfree(reply);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) kfree(cmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) return r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) static int mei_nfc_send(struct nfc_mei_phy *phy, u8 *buf, size_t length)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) struct mei_nfc_hdr *hdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) u8 *mei_buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) err = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) mei_buf = kzalloc(length + MEI_NFC_HEADER_SIZE, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) if (!mei_buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) hdr = (struct mei_nfc_hdr *)mei_buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) hdr->cmd = MEI_NFC_CMD_HCI_SEND;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) hdr->status = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) hdr->req_id = phy->req_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) hdr->reserved = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) hdr->data_size = length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) MEI_DUMP_NFC_HDR("send", hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) memcpy(mei_buf + MEI_NFC_HEADER_SIZE, buf, length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) err = mei_cldev_send(phy->cldev, mei_buf, length + MEI_NFC_HEADER_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) if (!wait_event_interruptible_timeout(phy->send_wq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) phy->recv_req_id == phy->req_id, HZ)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) pr_err("NFC MEI command timeout\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) err = -ETIME;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) phy->req_id++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) kfree(mei_buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) * Writing a frame must not return the number of written bytes.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) * It must return either zero for success, or <0 for error.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) * In addition, it must not alter the skb
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) static int nfc_mei_phy_write(void *phy_id, struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) struct nfc_mei_phy *phy = phy_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) int r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) MEI_DUMP_SKB_OUT("mei frame sent", skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) r = mei_nfc_send(phy, skb->data, skb->len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) if (r > 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) r = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) return r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) static int mei_nfc_recv(struct nfc_mei_phy *phy, u8 *buf, size_t length)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) struct mei_nfc_hdr *hdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) int received_length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) received_length = mei_cldev_recv(phy->cldev, buf, length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) if (received_length < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) return received_length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) hdr = (struct mei_nfc_hdr *) buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) MEI_DUMP_NFC_HDR("receive", hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) if (hdr->cmd == MEI_NFC_CMD_HCI_SEND) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) phy->recv_req_id = hdr->req_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) wake_up(&phy->send_wq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) return received_length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) static void nfc_mei_rx_cb(struct mei_cl_device *cldev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) struct nfc_mei_phy *phy = mei_cldev_get_drvdata(cldev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) int reply_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) if (!phy)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) if (phy->hard_fault != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) skb = alloc_skb(MEI_NFC_MAX_READ, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) if (!skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) reply_size = mei_nfc_recv(phy, skb->data, MEI_NFC_MAX_READ);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) if (reply_size < MEI_NFC_HEADER_SIZE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) kfree_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) skb_put(skb, reply_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) skb_pull(skb, MEI_NFC_HEADER_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) MEI_DUMP_SKB_IN("mei frame read", skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) nfc_hci_recv_frame(phy->hdev, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) static int nfc_mei_phy_enable(void *phy_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) int r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) struct nfc_mei_phy *phy = phy_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) pr_info("%s\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) if (phy->powered == 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) r = mei_cldev_enable(phy->cldev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) if (r < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) pr_err("Could not enable device %d\n", r);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) return r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) r = mei_nfc_if_version(phy);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) if (r < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) pr_err("Could not enable device %d\n", r);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) r = mei_nfc_connect(phy);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) if (r < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) pr_err("Could not connect to device %d\n", r);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) r = mei_cldev_register_rx_cb(phy->cldev, nfc_mei_rx_cb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) if (r) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) pr_err("Event cb registration failed %d\n", r);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) phy->powered = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) phy->powered = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) mei_cldev_disable(phy->cldev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) return r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) static void nfc_mei_phy_disable(void *phy_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) struct nfc_mei_phy *phy = phy_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) pr_info("%s\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) mei_cldev_disable(phy->cldev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) phy->powered = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) struct nfc_phy_ops mei_phy_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) .write = nfc_mei_phy_write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) .enable = nfc_mei_phy_enable,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) .disable = nfc_mei_phy_disable,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) EXPORT_SYMBOL_GPL(mei_phy_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) struct nfc_mei_phy *nfc_mei_phy_alloc(struct mei_cl_device *cldev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) struct nfc_mei_phy *phy;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) phy = kzalloc(sizeof(struct nfc_mei_phy), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) if (!phy)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) phy->cldev = cldev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) init_waitqueue_head(&phy->send_wq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) mei_cldev_set_drvdata(cldev, phy);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) return phy;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) EXPORT_SYMBOL_GPL(nfc_mei_phy_alloc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) void nfc_mei_phy_free(struct nfc_mei_phy *phy)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) mei_cldev_disable(phy->cldev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) kfree(phy);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) EXPORT_SYMBOL_GPL(nfc_mei_phy_free);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) MODULE_DESCRIPTION("mei bus NFC device interface");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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