^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * I2C link layer for the NXP NCI driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2014 NXP Semiconductors All rights reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Copyright (C) 2012-2015 Intel Corporation. All rights reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Authors: Clément Perrochaud <clement.perrochaud@nxp.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * Authors: Oleg Zhurakivskyy <oleg.zhurakivskyy@intel.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * Derived from PN544 device driver:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * Copyright (C) 2012 Intel Corporation. All rights reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/acpi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/i2c.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/nfc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/gpio/consumer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <asm/unaligned.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <net/nfc/nfc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include "nxp-nci.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #define NXP_NCI_I2C_DRIVER_NAME "nxp-nci_i2c"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #define NXP_NCI_I2C_MAX_PAYLOAD 32
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) struct nxp_nci_i2c_phy {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) struct i2c_client *i2c_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) struct nci_dev *ndev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) struct gpio_desc *gpiod_en;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) struct gpio_desc *gpiod_fw;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) int hard_fault; /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) * < 0 if hardware error occurred (e.g. i2c err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) * and prevents normal operation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) static int nxp_nci_i2c_set_mode(void *phy_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) enum nxp_nci_mode mode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) struct nxp_nci_i2c_phy *phy = (struct nxp_nci_i2c_phy *) phy_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) gpiod_set_value(phy->gpiod_fw, (mode == NXP_NCI_MODE_FW) ? 1 : 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) gpiod_set_value(phy->gpiod_en, (mode != NXP_NCI_MODE_COLD) ? 1 : 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) usleep_range(10000, 15000);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) if (mode == NXP_NCI_MODE_COLD)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) phy->hard_fault = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) static int nxp_nci_i2c_write(void *phy_id, struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) int r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) struct nxp_nci_i2c_phy *phy = phy_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) struct i2c_client *client = phy->i2c_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) if (phy->hard_fault != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) return phy->hard_fault;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) r = i2c_master_send(client, skb->data, skb->len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) if (r < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) /* Retry, chip was in standby */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) msleep(110);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) r = i2c_master_send(client, skb->data, skb->len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) if (r < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) nfc_err(&client->dev, "Error %d on I2C send\n", r);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) } else if (r != skb->len) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) nfc_err(&client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) "Invalid length sent: %u (expected %u)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) r, skb->len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) r = -EREMOTEIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) /* Success but return 0 and not number of bytes */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) r = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) return r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) static const struct nxp_nci_phy_ops i2c_phy_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) .set_mode = nxp_nci_i2c_set_mode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) .write = nxp_nci_i2c_write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) static int nxp_nci_i2c_fw_read(struct nxp_nci_i2c_phy *phy,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) struct sk_buff **skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) struct i2c_client *client = phy->i2c_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) u16 header;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) size_t frame_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) int r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) r = i2c_master_recv(client, (u8 *) &header, NXP_NCI_FW_HDR_LEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) if (r < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) goto fw_read_exit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) } else if (r != NXP_NCI_FW_HDR_LEN) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) nfc_err(&client->dev, "Incorrect header length: %u\n", r);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) r = -EBADMSG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) goto fw_read_exit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) frame_len = (be16_to_cpu(header) & NXP_NCI_FW_FRAME_LEN_MASK) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) NXP_NCI_FW_CRC_LEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) *skb = alloc_skb(NXP_NCI_FW_HDR_LEN + frame_len, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) if (*skb == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) r = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) goto fw_read_exit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) skb_put_data(*skb, &header, NXP_NCI_FW_HDR_LEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) r = i2c_master_recv(client, skb_put(*skb, frame_len), frame_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) if (r != frame_len) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) nfc_err(&client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) "Invalid frame length: %u (expected %zu)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) r, frame_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) r = -EBADMSG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) goto fw_read_exit_free_skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) fw_read_exit_free_skb:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) kfree_skb(*skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) fw_read_exit:
^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 nxp_nci_i2c_nci_read(struct nxp_nci_i2c_phy *phy,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) struct sk_buff **skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) struct nci_ctrl_hdr header; /* May actually be a data header */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) struct i2c_client *client = phy->i2c_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) int r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) r = i2c_master_recv(client, (u8 *) &header, NCI_CTRL_HDR_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) if (r < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) goto nci_read_exit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) } else if (r != NCI_CTRL_HDR_SIZE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) nfc_err(&client->dev, "Incorrect header length: %u\n", r);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) r = -EBADMSG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) goto nci_read_exit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) *skb = alloc_skb(NCI_CTRL_HDR_SIZE + header.plen, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) if (*skb == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) r = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) goto nci_read_exit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) skb_put_data(*skb, (void *)&header, NCI_CTRL_HDR_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) r = i2c_master_recv(client, skb_put(*skb, header.plen), header.plen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) if (r != header.plen) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) nfc_err(&client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) "Invalid frame payload length: %u (expected %u)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) r, header.plen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) r = -EBADMSG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) goto nci_read_exit_free_skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) nci_read_exit_free_skb:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) kfree_skb(*skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) nci_read_exit:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) return r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) static irqreturn_t nxp_nci_i2c_irq_thread_fn(int irq, void *phy_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) struct nxp_nci_i2c_phy *phy = phy_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) struct i2c_client *client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) struct nxp_nci_info *info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) struct sk_buff *skb = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) int r = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) if (!phy || !phy->ndev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) goto exit_irq_none;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) client = phy->i2c_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) if (!client || irq != client->irq)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) goto exit_irq_none;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) info = nci_get_drvdata(phy->ndev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) if (!info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) goto exit_irq_none;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) mutex_lock(&info->info_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) if (phy->hard_fault != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) goto exit_irq_handled;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) switch (info->mode) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) case NXP_NCI_MODE_NCI:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) r = nxp_nci_i2c_nci_read(phy, &skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) case NXP_NCI_MODE_FW:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) r = nxp_nci_i2c_fw_read(phy, &skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) case NXP_NCI_MODE_COLD:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) r = -EREMOTEIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) if (r == -EREMOTEIO) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) phy->hard_fault = r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) if (info->mode == NXP_NCI_MODE_FW)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) nxp_nci_fw_recv_frame(phy->ndev, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) if (r < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) nfc_err(&client->dev, "Read failed with error %d\n", r);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) goto exit_irq_handled;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) switch (info->mode) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) case NXP_NCI_MODE_NCI:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) nci_recv_frame(phy->ndev, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) case NXP_NCI_MODE_FW:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) nxp_nci_fw_recv_frame(phy->ndev, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) case NXP_NCI_MODE_COLD:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) exit_irq_handled:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) mutex_unlock(&info->info_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) return IRQ_HANDLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) exit_irq_none:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) WARN_ON_ONCE(1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) return IRQ_NONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) static const struct acpi_gpio_params firmware_gpios = { 1, 0, false };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) static const struct acpi_gpio_params enable_gpios = { 2, 0, false };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) static const struct acpi_gpio_mapping acpi_nxp_nci_gpios[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) { "enable-gpios", &enable_gpios, 1 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) { "firmware-gpios", &firmware_gpios, 1 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) { }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) static int nxp_nci_i2c_probe(struct i2c_client *client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) const struct i2c_device_id *id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) struct device *dev = &client->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) struct nxp_nci_i2c_phy *phy;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) int r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) nfc_err(&client->dev, "Need I2C_FUNC_I2C\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) phy = devm_kzalloc(&client->dev, sizeof(struct nxp_nci_i2c_phy),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) if (!phy)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) phy->i2c_dev = client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) i2c_set_clientdata(client, phy);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) r = devm_acpi_dev_add_driver_gpios(dev, acpi_nxp_nci_gpios);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) if (r)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) dev_dbg(dev, "Unable to add GPIO mapping table\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) phy->gpiod_en = devm_gpiod_get(dev, "enable", GPIOD_OUT_LOW);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) if (IS_ERR(phy->gpiod_en)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) nfc_err(dev, "Failed to get EN gpio\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) return PTR_ERR(phy->gpiod_en);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) phy->gpiod_fw = devm_gpiod_get(dev, "firmware", GPIOD_OUT_LOW);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) if (IS_ERR(phy->gpiod_fw)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) nfc_err(dev, "Failed to get FW gpio\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) return PTR_ERR(phy->gpiod_fw);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) r = nxp_nci_probe(phy, &client->dev, &i2c_phy_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) NXP_NCI_I2C_MAX_PAYLOAD, &phy->ndev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) if (r < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) return r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) r = request_threaded_irq(client->irq, NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) nxp_nci_i2c_irq_thread_fn,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) IRQF_TRIGGER_RISING | IRQF_ONESHOT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) NXP_NCI_I2C_DRIVER_NAME, phy);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) if (r < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) nfc_err(&client->dev, "Unable to register IRQ handler\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) return r;
^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) static int nxp_nci_i2c_remove(struct i2c_client *client)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) struct nxp_nci_i2c_phy *phy = i2c_get_clientdata(client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) nxp_nci_remove(phy->ndev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) free_irq(client->irq, phy);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) static const struct i2c_device_id nxp_nci_i2c_id_table[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) {"nxp-nci_i2c", 0},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) {}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) MODULE_DEVICE_TABLE(i2c, nxp_nci_i2c_id_table);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) static const struct of_device_id of_nxp_nci_i2c_match[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) { .compatible = "nxp,nxp-nci-i2c", },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) {}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) MODULE_DEVICE_TABLE(of, of_nxp_nci_i2c_match);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) #ifdef CONFIG_ACPI
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) static const struct acpi_device_id acpi_id[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) { "NXP1001" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) { "NXP7471" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) { }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) MODULE_DEVICE_TABLE(acpi, acpi_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) static struct i2c_driver nxp_nci_i2c_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) .name = NXP_NCI_I2C_DRIVER_NAME,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) .acpi_match_table = ACPI_PTR(acpi_id),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) .of_match_table = of_nxp_nci_i2c_match,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) .probe = nxp_nci_i2c_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) .id_table = nxp_nci_i2c_id_table,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) .remove = nxp_nci_i2c_remove,
^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) module_i2c_driver(nxp_nci_i2c_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) MODULE_DESCRIPTION("I2C driver for NXP NCI NFC controllers");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) MODULE_AUTHOR("Clément Perrochaud <clement.perrochaud@nxp.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) MODULE_AUTHOR("Oleg Zhurakivskyy <oleg.zhurakivskyy@intel.com>");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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