From 22098763a10d9c1340827fcf6edab66f153b27f0 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sun, 13 Sep 2026 12:27:00 -0700 Subject: Merge tag 'trace-v7.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace Pull tracing fixes from Steven Rostedt: - Don't destroy user event fields when removal fails User event fields are destroyed before the event is removed from visibility. But that can fail leaving the still visible event with no fields. Move the destroying of the fields to after the event is successfully removed from visibility. - Initialize function graph state is fork before calling copy_exec_state() For non-CLONE_VM forks, copy_exec_state() allocates a new task_exec_state. If that allocation fails, ftrace_graph_exit_task() will free the tasks ret_stack pointer. Since that pointer is still using the parent's ret_stack, it mistakenly frees the parent's pointer too. Call ftrace_graph_init() on the task first which will NULL out the new tasks's ret_stack and if the copy fails, it will not free anything. - Remove FGRAPH_MAX_INDEX The macro FGRAPH_MAX_INDEX was added but never used. Remove it. - Save ent_size in function graph printing of nested functions The function graph tracer needs to look at the next event to see if the next event is the return of the current function entry. If it is, it prints a single line: ktime_get(); Otherwise it prints it like a nested function: tick_nohz_irq_exit() { ktime_get(); kcpustat_irq_exit(); } In order to look at the next event, it must save the current event so that it has the information to print from it. It saves the event in the iterator descriptor called "ent". What it doesn't save is the ent_size of the event which is now used to know if the function graph arguments are to be printed. The peek doesn't save the size so the size used happens to be that of the size of the last event that was seen. Save the entry event size in the iterator descriptor so that the correct size is used. - Fix several errors with freeing data in the histogram code The histogram code had a lot of leaked or or incorrect accounting when failures happen. Correct them. - Fix histogram regression of .percent and .graph modifiers Up until 6.3 histogram values could have "percent" or "graph" modifiers that changed how they were printed. But a change that added restricting histograms values from being strings, stack traces and other modifiers inadvertently prevented them from using the percent and graph modifiers, which were legal use cases for values. Put back the percent and graph modifiers. - Fix various typos in the comments - Set the trace_clock before initializing a histogram with clock argument The histogram API allows the user to specific which trace clock to use via a "clock=" string. The histogram is set up first before the clock is checked. If the passed in clock is not valid, it exits without fully fixing up the histogram leaving it on the list and a use-after-free can trigger. Update the clock argument first and if it fails then exit gracefully before the histogram trigger is placed on any lists. - Restore :mod: trailer after parsing in ftrace_set_clr_event The function ftrace_set_clr_event() modifies the parse string and needs to put it back to what was passed in. It searches for ":mod:" via a strsep() but fails to put back the first ':' in the string. Add back the ':' in the passed in string. - Take trace_array reference when opening a tracer options file The options files are dynamically created and some tracers add their own options. When a tracer adds their own list of options, the trace_array holding them has an array to hold the list of options for each tracer. This array increases in size via a krealloc(), and the new entry gets a newly allocated array to hold the options of the new tracer being added. The element in each entry of the tracer's option array holds a pointer back to the trace_array, a pointer to the tracer it is associated to, a pointer to the flags of the option. The issue is that these arrays are freed when the trace_array is freed when its instance it represents is removed from the instances directory. There's a race that an open of one of these options files can happen when the instance is being removed. Add a new helper function to be called by the open function of the options file to iterate all existing trace_arrays under a lock and find the one that has the given option element in one of it's tracer arrays. If found, then update the associated trace_array's reference counter to keep it from being freed. If not found, have the open call return -ENODEV. - Disable interrupts when acquiring the lock in rb_wake_up_waiters() The function rb_wake_up_waiters() assumes it will be called in interrupt context and does not disable irqs when taking cpu_buffer->reader_lock, which can be called in hard interrupt context. The issue is in PREEMPT_RT, this function is called in thread context leaving this lock open to a deadlock. Take the lock with interrupts disabled. - Use rcu_assign_pointer() for tmp_ops filter hash The tmp_ops used in update_ftrace_direct_mod() assigns its filter_hash field directly, but that field is annotated as __rcu and sparse complains. Assign it with rcu_assign_pointer() - Fix use-after-free in enable_trigger_private_data_free() The trace_event_call is accessed through the event_trigger_data's trace_event_file pointer to put the trace_event_call on freeing. The issue is that the trace_event_file data may have been freed already causing a use-after-free. Add a field to the event_trigger_data that points directly to the trace_event_call so that it can decrement its reference directly without needing to go through the trace_event_file. - Fix accounting of buffer data remote headers trace_buffer_desc_size() and trace_remote_alloc_buffer() undercount the number of pages is needed for the asked for size as it doesn't take into account the meta data on each page. Add a helper function to do the calculation properly and use that in these functions. - Catch nr_page_va overflow in ring_buffer_desc sizing The number of pages per remote ring buffer is capped by ring_buffer_desc::nr_page_va (32 bits). A buffer_size large enough to overflow that field would silently allocate a descriptor smaller than what was asked for. - Do not resize the subbuf order if any per_cpu buffer is disabled The mmapping of ring buffers disables resizing the subbuffers, but it is done per-cpu whereas the subbuf size change is done for all the per_cpu buffers under the buffer->mutex. It could change the size of some while the mapping is happening on others. Have the resize of the subbuf order check all the per_cpu buffers under the lock to see if any of them is disabled before starting and causing an inconsistency between buffers that are being mapped. * tag 'trace-v7.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace: (25 commits) ring-buffer: Check resize_disabled before publishing the new subbuf order tracing/remotes: Catch nr_page_va overflow in ring_buffer_desc sizing tracing/remotes: Account for ring buffer page header in size calculation tracing: Don't dereference trace_event_file in deferred trigger free ftrace: Use rcu_assign_pointer() for tmp_ops filter hash ring-buffer: Acquire the lock with irqsave in rb_wake_up_waiters() tracing: Take trace_array reference when opening a tracer options file tracing: Fix ring_buffer_read_page_size() kernel-doc tracing: Restore :mod: trailer after parsing in ftrace_set_clr_event() tracing: Fix memory corruption from a "STACKTRACE" histogram key tracing: Fix memory corruption from the histogram stacktrace modifier tracing: Undo the registration when enabling the histogram trigger fails tracing: Take the reference before publishing the named histogram trigger tracing: Set the trace clock before registering the histogram trigger tracing: Fix typo "preceeded" in comment tracing: Fix typo "availabe" in comment tracing: Let histogram values keep the percent and graph modifiers tracing: Keep the entry count when the histogram stats allocation fails tracing: Free histogram the field rejected for a bad modifier tracing: Free histogram the var ref when its initialization fails ... --- drivers/nfc/microread/Kconfig | 32 ++ drivers/nfc/microread/Makefile | 11 + drivers/nfc/microread/i2c.c | 296 +++++++++++++++ drivers/nfc/microread/mei.c | 71 ++++ drivers/nfc/microread/microread.c | 748 ++++++++++++++++++++++++++++++++++++++ drivers/nfc/microread/microread.h | 19 + 6 files changed, 1177 insertions(+) create mode 100644 drivers/nfc/microread/Kconfig create mode 100644 drivers/nfc/microread/Makefile create mode 100644 drivers/nfc/microread/i2c.c create mode 100644 drivers/nfc/microread/mei.c create mode 100644 drivers/nfc/microread/microread.c create mode 100644 drivers/nfc/microread/microread.h (limited to 'drivers/nfc/microread') diff --git a/drivers/nfc/microread/Kconfig b/drivers/nfc/microread/Kconfig new file mode 100644 index 000000000..21a682b19 --- /dev/null +++ b/drivers/nfc/microread/Kconfig @@ -0,0 +1,32 @@ +# SPDX-License-Identifier: GPL-2.0-only +config NFC_MICROREAD + tristate + select CRC_CCITT + help + This module contains the main code for Inside Secure microread + NFC chipsets. It implements the chipset HCI logic and hooks into + the NFC kernel APIs. Physical layers will register against it. + +config NFC_MICROREAD_I2C + tristate "Inside Secure Microread device support (I2C)" + depends on NFC_HCI && I2C && NFC_SHDLC + select NFC_MICROREAD + help + This module adds support for the i2c interface of adapters using + Inside microread chipsets. Select this if your platform is using + the i2c bus. + + If you choose to build a module, it'll be called microread_i2c. + Say N if unsure. + +config NFC_MICROREAD_MEI + tristate "Inside Secure Microread device support (MEI)" + depends on NFC_HCI && NFC_MEI_PHY + select NFC_MICROREAD + help + This module adds support for the mei interface of adapters using + Inside microread chipsets. Select this if your microread chipset + is handled by Intel's Management Engine Interface on your platform. + + If you choose to build a module, it'll be called microread_mei. + Say N if unsure. diff --git a/drivers/nfc/microread/Makefile b/drivers/nfc/microread/Makefile new file mode 100644 index 000000000..2f7dda265 --- /dev/null +++ b/drivers/nfc/microread/Makefile @@ -0,0 +1,11 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# Makefile for Microread HCI based NFC driver +# + +microread_i2c-objs = i2c.o +microread_mei-objs = mei.o + +obj-$(CONFIG_NFC_MICROREAD) += microread.o +obj-$(CONFIG_NFC_MICROREAD_I2C) += microread_i2c.o +obj-$(CONFIG_NFC_MICROREAD_MEI) += microread_mei.o diff --git a/drivers/nfc/microread/i2c.c b/drivers/nfc/microread/i2c.c new file mode 100644 index 000000000..f45e883b8 --- /dev/null +++ b/drivers/nfc/microread/i2c.c @@ -0,0 +1,296 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * HCI based Driver for Inside Secure microread NFC Chip - i2c layer + * + * Copyright (C) 2013 Intel Corporation. All rights reserved. + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include +#include +#include +#include +#include + +#include +#include +#include + +#include "microread.h" + +#define MICROREAD_I2C_DRIVER_NAME "microread" + +#define MICROREAD_I2C_FRAME_HEADROOM 1 +#define MICROREAD_I2C_FRAME_TAILROOM 1 + +/* framing in HCI mode */ +#define MICROREAD_I2C_LLC_LEN 1 +#define MICROREAD_I2C_LLC_CRC 1 +#define MICROREAD_I2C_LLC_LEN_CRC (MICROREAD_I2C_LLC_LEN + \ + MICROREAD_I2C_LLC_CRC) +#define MICROREAD_I2C_LLC_MIN_SIZE (1 + MICROREAD_I2C_LLC_LEN_CRC) +#define MICROREAD_I2C_LLC_MAX_PAYLOAD 29 +#define MICROREAD_I2C_LLC_MAX_SIZE (MICROREAD_I2C_LLC_LEN_CRC + 1 + \ + MICROREAD_I2C_LLC_MAX_PAYLOAD) + +struct microread_i2c_phy { + struct i2c_client *i2c_dev; + struct nfc_hci_dev *hdev; + + int hard_fault; /* + * < 0 if hardware error occured (e.g. i2c err) + * and prevents normal operation. + */ +}; + +#define I2C_DUMP_SKB(info, skb) \ +do { \ + pr_debug("%s:\n", info); \ + print_hex_dump(KERN_DEBUG, "i2c: ", DUMP_PREFIX_OFFSET, \ + 16, 1, (skb)->data, (skb)->len, 0); \ +} while (0) + +static void microread_i2c_add_len_crc(struct sk_buff *skb) +{ + int i; + u8 crc = 0; + int len; + + len = skb->len; + *(u8 *)skb_push(skb, 1) = len; + + for (i = 0; i < skb->len; i++) + crc = crc ^ skb->data[i]; + + skb_put_u8(skb, crc); +} + +static void microread_i2c_remove_len_crc(struct sk_buff *skb) +{ + skb_pull(skb, MICROREAD_I2C_FRAME_HEADROOM); + skb_trim(skb, MICROREAD_I2C_FRAME_TAILROOM); +} + +static int check_crc(const struct sk_buff *skb) +{ + int i; + u8 crc = 0; + + for (i = 0; i < skb->len - 1; i++) + crc = crc ^ skb->data[i]; + + if (crc != skb->data[skb->len-1]) { + pr_err("CRC error 0x%x != 0x%x\n", crc, skb->data[skb->len-1]); + pr_info("%s: BAD CRC\n", __func__); + return -EPERM; + } + + return 0; +} + +static int microread_i2c_enable(void *phy_id) +{ + return 0; +} + +static void microread_i2c_disable(void *phy_id) +{ + return; +} + +static int microread_i2c_write(void *phy_id, struct sk_buff *skb) +{ + int r; + struct microread_i2c_phy *phy = phy_id; + struct i2c_client *client = phy->i2c_dev; + + if (phy->hard_fault != 0) + return phy->hard_fault; + + usleep_range(3000, 6000); + + microread_i2c_add_len_crc(skb); + + I2C_DUMP_SKB("i2c frame written", skb); + + r = i2c_master_send(client, skb->data, skb->len); + + if (r == -EREMOTEIO) { /* Retry, chip was in standby */ + usleep_range(6000, 10000); + r = i2c_master_send(client, skb->data, skb->len); + } + + if (r >= 0) { + if (r != skb->len) + r = -EREMOTEIO; + else + r = 0; + } + + microread_i2c_remove_len_crc(skb); + + return r; +} + + +static int microread_i2c_read(struct microread_i2c_phy *phy, + struct sk_buff **skb) +{ + int r; + u8 len; + u8 tmp[MICROREAD_I2C_LLC_MAX_SIZE - 1]; + struct i2c_client *client = phy->i2c_dev; + + r = i2c_master_recv(client, &len, 1); + if (r != 1) { + nfc_err(&client->dev, "cannot read len byte\n"); + return -EREMOTEIO; + } + + if ((len < MICROREAD_I2C_LLC_MIN_SIZE) || + (len > MICROREAD_I2C_LLC_MAX_SIZE)) { + nfc_err(&client->dev, "invalid len byte\n"); + r = -EBADMSG; + goto flush; + } + + *skb = alloc_skb(1 + len, GFP_KERNEL); + if (*skb == NULL) { + r = -ENOMEM; + goto flush; + } + + skb_put_u8(*skb, len); + + r = i2c_master_recv(client, skb_put(*skb, len), len); + if (r != len) { + kfree_skb(*skb); + return -EREMOTEIO; + } + + I2C_DUMP_SKB("cc frame read", *skb); + + r = check_crc(*skb); + if (r != 0) { + kfree_skb(*skb); + r = -EBADMSG; + goto flush; + } + + skb_pull(*skb, 1); + skb_trim(*skb, (*skb)->len - MICROREAD_I2C_FRAME_TAILROOM); + + usleep_range(3000, 6000); + + return 0; + +flush: + if (i2c_master_recv(client, tmp, sizeof(tmp)) < 0) + r = -EREMOTEIO; + + usleep_range(3000, 6000); + + return r; +} + +static irqreturn_t microread_i2c_irq_thread_fn(int irq, void *phy_id) +{ + struct microread_i2c_phy *phy = phy_id; + struct sk_buff *skb = NULL; + int r; + + if (!phy || irq != phy->i2c_dev->irq) { + WARN_ON_ONCE(1); + return IRQ_NONE; + } + + if (phy->hard_fault != 0) + return IRQ_HANDLED; + + r = microread_i2c_read(phy, &skb); + if (r == -EREMOTEIO) { + phy->hard_fault = r; + + nfc_hci_recv_frame(phy->hdev, NULL); + + return IRQ_HANDLED; + } else if ((r == -ENOMEM) || (r == -EBADMSG)) { + return IRQ_HANDLED; + } + + nfc_hci_recv_frame(phy->hdev, skb); + + return IRQ_HANDLED; +} + +static const struct nfc_phy_ops i2c_phy_ops = { + .write = microread_i2c_write, + .enable = microread_i2c_enable, + .disable = microread_i2c_disable, +}; + +static int microread_i2c_probe(struct i2c_client *client) +{ + struct microread_i2c_phy *phy; + int r; + + phy = devm_kzalloc(&client->dev, sizeof(struct microread_i2c_phy), + GFP_KERNEL); + if (!phy) + return -ENOMEM; + + i2c_set_clientdata(client, phy); + phy->i2c_dev = client; + + r = request_threaded_irq(client->irq, NULL, microread_i2c_irq_thread_fn, + IRQF_TRIGGER_RISING | IRQF_ONESHOT, + MICROREAD_I2C_DRIVER_NAME, phy); + if (r) { + nfc_err(&client->dev, "Unable to register IRQ handler\n"); + return r; + } + + r = microread_probe(phy, &i2c_phy_ops, LLC_SHDLC_NAME, + MICROREAD_I2C_FRAME_HEADROOM, + MICROREAD_I2C_FRAME_TAILROOM, + MICROREAD_I2C_LLC_MAX_PAYLOAD, &phy->hdev); + if (r < 0) + goto err_irq; + + return 0; + +err_irq: + free_irq(client->irq, phy); + + return r; +} + +static void microread_i2c_remove(struct i2c_client *client) +{ + struct microread_i2c_phy *phy = i2c_get_clientdata(client); + + microread_remove(phy->hdev); + + free_irq(client->irq, phy); +} + +static const struct i2c_device_id microread_i2c_id[] = { + { .name = MICROREAD_I2C_DRIVER_NAME }, + { } +}; +MODULE_DEVICE_TABLE(i2c, microread_i2c_id); + +static struct i2c_driver microread_i2c_driver = { + .driver = { + .name = MICROREAD_I2C_DRIVER_NAME, + }, + .probe = microread_i2c_probe, + .remove = microread_i2c_remove, + .id_table = microread_i2c_id, +}; + +module_i2c_driver(microread_i2c_driver); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION(DRIVER_DESC); diff --git a/drivers/nfc/microread/mei.c b/drivers/nfc/microread/mei.c new file mode 100644 index 000000000..484e3ae0e --- /dev/null +++ b/drivers/nfc/microread/mei.c @@ -0,0 +1,71 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2013 Intel Corporation. All rights reserved. + * + * HCI based Driver for Inside Secure microread NFC Chip + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include +#include +#include + +#include "../mei_phy.h" +#include "microread.h" + +#define MICROREAD_DRIVER_NAME "microread" + +static int microread_mei_probe(struct mei_cl_device *cldev, + const struct mei_cl_device_id *id) +{ + struct nfc_mei_phy *phy; + int r; + + phy = nfc_mei_phy_alloc(cldev); + if (!phy) + return -ENOMEM; + + r = microread_probe(phy, &mei_phy_ops, LLC_NOP_NAME, + MEI_NFC_HEADER_SIZE, 0, MEI_NFC_MAX_HCI_PAYLOAD, + &phy->hdev); + if (r < 0) { + nfc_mei_phy_free(phy); + + return r; + } + + return 0; +} + +static void microread_mei_remove(struct mei_cl_device *cldev) +{ + struct nfc_mei_phy *phy = mei_cldev_get_drvdata(cldev); + + microread_remove(phy->hdev); + + nfc_mei_phy_free(phy); +} + +static struct mei_cl_device_id microread_mei_tbl[] = { + { + .name = MICROREAD_DRIVER_NAME, + .uuid = MEI_NFC_UUID, + .version = MEI_CL_VERSION_ANY, + }, + { /* required last entry */ } +}; +MODULE_DEVICE_TABLE(mei, microread_mei_tbl); + +static struct mei_cl_driver microread_driver = { + .id_table = microread_mei_tbl, + .name = MICROREAD_DRIVER_NAME, + + .probe = microread_mei_probe, + .remove = microread_mei_remove, +}; + +module_mei_cl_driver(microread_driver); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION(DRIVER_DESC); diff --git a/drivers/nfc/microread/microread.c b/drivers/nfc/microread/microread.c new file mode 100644 index 000000000..dfa2490db --- /dev/null +++ b/drivers/nfc/microread/microread.c @@ -0,0 +1,748 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * HCI based Driver for Inside Secure microread NFC Chip + * + * Copyright (C) 2013 Intel Corporation. All rights reserved. + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include +#include +#include +#include + +#include +#include +#include + +#include "microread.h" + +/* Proprietary gates, events, commands and registers */ +/* Admin */ +#define MICROREAD_GATE_ID_ADM NFC_HCI_ADMIN_GATE +#define MICROREAD_GATE_ID_MGT 0x01 +#define MICROREAD_GATE_ID_OS 0x02 +#define MICROREAD_GATE_ID_TESTRF 0x03 +#define MICROREAD_GATE_ID_LOOPBACK NFC_HCI_LOOPBACK_GATE +#define MICROREAD_GATE_ID_IDT NFC_HCI_ID_MGMT_GATE +#define MICROREAD_GATE_ID_LMS NFC_HCI_LINK_MGMT_GATE + +/* Reader */ +#define MICROREAD_GATE_ID_MREAD_GEN 0x10 +#define MICROREAD_GATE_ID_MREAD_ISO_B NFC_HCI_RF_READER_B_GATE +#define MICROREAD_GATE_ID_MREAD_NFC_T1 0x12 +#define MICROREAD_GATE_ID_MREAD_ISO_A NFC_HCI_RF_READER_A_GATE +#define MICROREAD_GATE_ID_MREAD_NFC_T3 0x14 +#define MICROREAD_GATE_ID_MREAD_ISO_15_3 0x15 +#define MICROREAD_GATE_ID_MREAD_ISO_15_2 0x16 +#define MICROREAD_GATE_ID_MREAD_ISO_B_3 0x17 +#define MICROREAD_GATE_ID_MREAD_BPRIME 0x18 +#define MICROREAD_GATE_ID_MREAD_ISO_A_3 0x19 + +/* Card */ +#define MICROREAD_GATE_ID_MCARD_GEN 0x20 +#define MICROREAD_GATE_ID_MCARD_ISO_B 0x21 +#define MICROREAD_GATE_ID_MCARD_BPRIME 0x22 +#define MICROREAD_GATE_ID_MCARD_ISO_A 0x23 +#define MICROREAD_GATE_ID_MCARD_NFC_T3 0x24 +#define MICROREAD_GATE_ID_MCARD_ISO_15_3 0x25 +#define MICROREAD_GATE_ID_MCARD_ISO_15_2 0x26 +#define MICROREAD_GATE_ID_MCARD_ISO_B_2 0x27 +#define MICROREAD_GATE_ID_MCARD_ISO_CUSTOM 0x28 +#define MICROREAD_GATE_ID_SECURE_ELEMENT 0x2F + +/* P2P */ +#define MICROREAD_GATE_ID_P2P_GEN 0x30 +#define MICROREAD_GATE_ID_P2P_TARGET 0x31 +#define MICROREAD_PAR_P2P_TARGET_MODE 0x01 +#define MICROREAD_PAR_P2P_TARGET_GT 0x04 +#define MICROREAD_GATE_ID_P2P_INITIATOR 0x32 +#define MICROREAD_PAR_P2P_INITIATOR_GI 0x01 +#define MICROREAD_PAR_P2P_INITIATOR_GT 0x03 + +/* Those pipes are created/opened by default in the chip */ +#define MICROREAD_PIPE_ID_LMS 0x00 +#define MICROREAD_PIPE_ID_ADMIN 0x01 +#define MICROREAD_PIPE_ID_MGT 0x02 +#define MICROREAD_PIPE_ID_OS 0x03 +#define MICROREAD_PIPE_ID_HDS_LOOPBACK 0x04 +#define MICROREAD_PIPE_ID_HDS_IDT 0x05 +#define MICROREAD_PIPE_ID_HDS_MCARD_ISO_B 0x08 +#define MICROREAD_PIPE_ID_HDS_MCARD_ISO_BPRIME 0x09 +#define MICROREAD_PIPE_ID_HDS_MCARD_ISO_A 0x0A +#define MICROREAD_PIPE_ID_HDS_MCARD_ISO_15_3 0x0B +#define MICROREAD_PIPE_ID_HDS_MCARD_ISO_15_2 0x0C +#define MICROREAD_PIPE_ID_HDS_MCARD_NFC_T3 0x0D +#define MICROREAD_PIPE_ID_HDS_MCARD_ISO_B_2 0x0E +#define MICROREAD_PIPE_ID_HDS_MCARD_CUSTOM 0x0F +#define MICROREAD_PIPE_ID_HDS_MREAD_ISO_B 0x10 +#define MICROREAD_PIPE_ID_HDS_MREAD_NFC_T1 0x11 +#define MICROREAD_PIPE_ID_HDS_MREAD_ISO_A 0x12 +#define MICROREAD_PIPE_ID_HDS_MREAD_ISO_15_3 0x13 +#define MICROREAD_PIPE_ID_HDS_MREAD_ISO_15_2 0x14 +#define MICROREAD_PIPE_ID_HDS_MREAD_NFC_T3 0x15 +#define MICROREAD_PIPE_ID_HDS_MREAD_ISO_B_3 0x16 +#define MICROREAD_PIPE_ID_HDS_MREAD_BPRIME 0x17 +#define MICROREAD_PIPE_ID_HDS_MREAD_ISO_A_3 0x18 +#define MICROREAD_PIPE_ID_HDS_MREAD_GEN 0x1B +#define MICROREAD_PIPE_ID_HDS_STACKED_ELEMENT 0x1C +#define MICROREAD_PIPE_ID_HDS_INSTANCES 0x1D +#define MICROREAD_PIPE_ID_HDS_TESTRF 0x1E +#define MICROREAD_PIPE_ID_HDS_P2P_TARGET 0x1F +#define MICROREAD_PIPE_ID_HDS_P2P_INITIATOR 0x20 + +/* Events */ +#define MICROREAD_EVT_MREAD_DISCOVERY_OCCURED NFC_HCI_EVT_TARGET_DISCOVERED +#define MICROREAD_EVT_MREAD_CARD_FOUND 0x3D +#define MICROREAD_EMCF_A_ATQA 0 +#define MICROREAD_EMCF_A_SAK 2 +#define MICROREAD_EMCF_A_LEN 3 +#define MICROREAD_EMCF_A_UID 4 +#define MICROREAD_EMCF_A3_ATQA 0 +#define MICROREAD_EMCF_A3_SAK 2 +#define MICROREAD_EMCF_A3_LEN 3 +#define MICROREAD_EMCF_A3_UID 4 +#define MICROREAD_EMCF_B_UID 0 +#define MICROREAD_EMCF_T1_ATQA 0 +#define MICROREAD_EMCF_T1_UID 4 +#define MICROREAD_EMCF_T3_UID 0 +#define MICROREAD_EVT_MREAD_DISCOVERY_START NFC_HCI_EVT_READER_REQUESTED +#define MICROREAD_EVT_MREAD_DISCOVERY_START_SOME 0x3E +#define MICROREAD_EVT_MREAD_DISCOVERY_STOP NFC_HCI_EVT_END_OPERATION +#define MICROREAD_EVT_MREAD_SIM_REQUESTS 0x3F +#define MICROREAD_EVT_MCARD_EXCHANGE NFC_HCI_EVT_TARGET_DISCOVERED +#define MICROREAD_EVT_P2P_INITIATOR_EXCHANGE_TO_RF 0x20 +#define MICROREAD_EVT_P2P_INITIATOR_EXCHANGE_FROM_RF 0x21 +#define MICROREAD_EVT_MCARD_FIELD_ON 0x11 +#define MICROREAD_EVT_P2P_TARGET_ACTIVATED 0x13 +#define MICROREAD_EVT_P2P_TARGET_DEACTIVATED 0x12 +#define MICROREAD_EVT_MCARD_FIELD_OFF 0x14 + +/* Commands */ +#define MICROREAD_CMD_MREAD_EXCHANGE 0x10 +#define MICROREAD_CMD_MREAD_SUBSCRIBE 0x3F + +/* Hosts IDs */ +#define MICROREAD_ELT_ID_HDS NFC_HCI_TERMINAL_HOST_ID +#define MICROREAD_ELT_ID_SIM NFC_HCI_UICC_HOST_ID +#define MICROREAD_ELT_ID_SE1 0x03 +#define MICROREAD_ELT_ID_SE2 0x04 +#define MICROREAD_ELT_ID_SE3 0x05 + +static const struct nfc_hci_gate microread_gates[] = { + {MICROREAD_GATE_ID_ADM, MICROREAD_PIPE_ID_ADMIN}, + {MICROREAD_GATE_ID_LOOPBACK, MICROREAD_PIPE_ID_HDS_LOOPBACK}, + {MICROREAD_GATE_ID_IDT, MICROREAD_PIPE_ID_HDS_IDT}, + {MICROREAD_GATE_ID_LMS, MICROREAD_PIPE_ID_LMS}, + {MICROREAD_GATE_ID_MREAD_ISO_B, MICROREAD_PIPE_ID_HDS_MREAD_ISO_B}, + {MICROREAD_GATE_ID_MREAD_ISO_A, MICROREAD_PIPE_ID_HDS_MREAD_ISO_A}, + {MICROREAD_GATE_ID_MREAD_ISO_A_3, MICROREAD_PIPE_ID_HDS_MREAD_ISO_A_3}, + {MICROREAD_GATE_ID_MGT, MICROREAD_PIPE_ID_MGT}, + {MICROREAD_GATE_ID_OS, MICROREAD_PIPE_ID_OS}, + {MICROREAD_GATE_ID_MREAD_NFC_T1, MICROREAD_PIPE_ID_HDS_MREAD_NFC_T1}, + {MICROREAD_GATE_ID_MREAD_NFC_T3, MICROREAD_PIPE_ID_HDS_MREAD_NFC_T3}, + {MICROREAD_GATE_ID_P2P_TARGET, MICROREAD_PIPE_ID_HDS_P2P_TARGET}, + {MICROREAD_GATE_ID_P2P_INITIATOR, MICROREAD_PIPE_ID_HDS_P2P_INITIATOR} +}; + +/* Largest headroom needed for outgoing custom commands */ +#define MICROREAD_CMDS_HEADROOM 2 +#define MICROREAD_CMD_TAILROOM 2 + +struct microread_info { + const struct nfc_phy_ops *phy_ops; + void *phy_id; + + struct nfc_hci_dev *hdev; + + int async_cb_type; + data_exchange_cb_t async_cb; + void *async_cb_context; +}; + +static int microread_open(struct nfc_hci_dev *hdev) +{ + struct microread_info *info = nfc_hci_get_clientdata(hdev); + + return info->phy_ops->enable(info->phy_id); +} + +static void microread_close(struct nfc_hci_dev *hdev) +{ + struct microread_info *info = nfc_hci_get_clientdata(hdev); + + info->phy_ops->disable(info->phy_id); +} + +static int microread_hci_ready(struct nfc_hci_dev *hdev) +{ + int r; + u8 param[4]; + + param[0] = 0x03; + r = nfc_hci_send_cmd(hdev, MICROREAD_GATE_ID_MREAD_ISO_A, + MICROREAD_CMD_MREAD_SUBSCRIBE, param, 1, NULL); + if (r) + return r; + + r = nfc_hci_send_cmd(hdev, MICROREAD_GATE_ID_MREAD_ISO_A_3, + MICROREAD_CMD_MREAD_SUBSCRIBE, NULL, 0, NULL); + if (r) + return r; + + param[0] = 0x00; + param[1] = 0x03; + param[2] = 0x00; + r = nfc_hci_send_cmd(hdev, MICROREAD_GATE_ID_MREAD_ISO_B, + MICROREAD_CMD_MREAD_SUBSCRIBE, param, 3, NULL); + if (r) + return r; + + r = nfc_hci_send_cmd(hdev, MICROREAD_GATE_ID_MREAD_NFC_T1, + MICROREAD_CMD_MREAD_SUBSCRIBE, NULL, 0, NULL); + if (r) + return r; + + param[0] = 0xFF; + param[1] = 0xFF; + param[2] = 0x00; + param[3] = 0x00; + r = nfc_hci_send_cmd(hdev, MICROREAD_GATE_ID_MREAD_NFC_T3, + MICROREAD_CMD_MREAD_SUBSCRIBE, param, 4, NULL); + + return r; +} + +static int microread_xmit(struct nfc_hci_dev *hdev, struct sk_buff *skb) +{ + struct microread_info *info = nfc_hci_get_clientdata(hdev); + + return info->phy_ops->write(info->phy_id, skb); +} + +static int microread_start_poll(struct nfc_hci_dev *hdev, + u32 im_protocols, u32 tm_protocols) +{ + int r; + + u8 param[2]; + u8 mode; + + param[0] = 0x00; + param[1] = 0x00; + + if (im_protocols & NFC_PROTO_ISO14443_MASK) + param[0] |= (1 << 2); + + if (im_protocols & NFC_PROTO_ISO14443_B_MASK) + param[0] |= 1; + + if (im_protocols & NFC_PROTO_MIFARE_MASK) + param[1] |= 1; + + if (im_protocols & NFC_PROTO_JEWEL_MASK) + param[0] |= (1 << 1); + + if (im_protocols & NFC_PROTO_FELICA_MASK) + param[0] |= (1 << 5); + + if (im_protocols & NFC_PROTO_NFC_DEP_MASK) + param[1] |= (1 << 1); + + if ((im_protocols | tm_protocols) & NFC_PROTO_NFC_DEP_MASK) { + hdev->gb = nfc_get_local_general_bytes(hdev->ndev, + &hdev->gb_len); + if (hdev->gb == NULL || hdev->gb_len == 0) { + im_protocols &= ~NFC_PROTO_NFC_DEP_MASK; + tm_protocols &= ~NFC_PROTO_NFC_DEP_MASK; + } + } + + r = nfc_hci_send_event(hdev, MICROREAD_GATE_ID_MREAD_ISO_A, + MICROREAD_EVT_MREAD_DISCOVERY_STOP, NULL, 0); + if (r) + return r; + + mode = 0xff; + r = nfc_hci_set_param(hdev, MICROREAD_GATE_ID_P2P_TARGET, + MICROREAD_PAR_P2P_TARGET_MODE, &mode, 1); + if (r) + return r; + + if (im_protocols & NFC_PROTO_NFC_DEP_MASK) { + r = nfc_hci_set_param(hdev, MICROREAD_GATE_ID_P2P_INITIATOR, + MICROREAD_PAR_P2P_INITIATOR_GI, + hdev->gb, hdev->gb_len); + if (r) + return r; + } + + if (tm_protocols & NFC_PROTO_NFC_DEP_MASK) { + r = nfc_hci_set_param(hdev, MICROREAD_GATE_ID_P2P_TARGET, + MICROREAD_PAR_P2P_TARGET_GT, + hdev->gb, hdev->gb_len); + if (r) + return r; + + mode = 0x02; + r = nfc_hci_set_param(hdev, MICROREAD_GATE_ID_P2P_TARGET, + MICROREAD_PAR_P2P_TARGET_MODE, &mode, 1); + if (r) + return r; + } + + return nfc_hci_send_event(hdev, MICROREAD_GATE_ID_MREAD_ISO_A, + MICROREAD_EVT_MREAD_DISCOVERY_START_SOME, + param, 2); +} + +static int microread_dep_link_up(struct nfc_hci_dev *hdev, + struct nfc_target *target, u8 comm_mode, + u8 *gb, size_t gb_len) +{ + struct sk_buff *rgb_skb = NULL; + int r; + + r = nfc_hci_get_param(hdev, target->hci_reader_gate, + MICROREAD_PAR_P2P_INITIATOR_GT, &rgb_skb); + if (r < 0) + return r; + + if (rgb_skb->len == 0 || rgb_skb->len > NFC_GB_MAXSIZE) { + r = -EPROTO; + goto exit; + } + + r = nfc_set_remote_general_bytes(hdev->ndev, rgb_skb->data, + rgb_skb->len); + if (r == 0) + r = nfc_dep_link_is_up(hdev->ndev, target->idx, comm_mode, + NFC_RF_INITIATOR); +exit: + kfree_skb(rgb_skb); + + return r; +} + +static int microread_dep_link_down(struct nfc_hci_dev *hdev) +{ + return nfc_hci_send_event(hdev, MICROREAD_GATE_ID_P2P_INITIATOR, + MICROREAD_EVT_MREAD_DISCOVERY_STOP, NULL, 0); +} + +static int microread_target_from_gate(struct nfc_hci_dev *hdev, u8 gate, + struct nfc_target *target) +{ + switch (gate) { + case MICROREAD_GATE_ID_P2P_INITIATOR: + target->supported_protocols = NFC_PROTO_NFC_DEP_MASK; + break; + default: + return -EPROTO; + } + + return 0; +} + +static int microread_complete_target_discovered(struct nfc_hci_dev *hdev, + u8 gate, + struct nfc_target *target) +{ + return 0; +} + +#define MICROREAD_CB_TYPE_READER_ALL 1 + +static void microread_im_transceive_cb(void *context, struct sk_buff *skb, + int err) +{ + const struct microread_info *info = context; + + switch (info->async_cb_type) { + case MICROREAD_CB_TYPE_READER_ALL: + if (err == 0) { + if (skb->len == 0) { + kfree_skb(skb); + info->async_cb(info->async_cb_context, NULL, + -EPROTO); + return; + } + + if (skb->data[skb->len - 1] != 0) { + err = nfc_hci_result_to_errno( + skb->data[skb->len - 1]); + kfree_skb(skb); + info->async_cb(info->async_cb_context, NULL, + err); + return; + } + + skb_trim(skb, skb->len - 1); /* RF Error ind. */ + } + info->async_cb(info->async_cb_context, skb, err); + break; + default: + if (err == 0) + kfree_skb(skb); + break; + } +} + +/* + * Returns: + * <= 0: driver handled the data exchange + * 1: driver doesn't especially handle, please do standard processing + */ +static int microread_im_transceive(struct nfc_hci_dev *hdev, + struct nfc_target *target, + struct sk_buff *skb, data_exchange_cb_t cb, + void *cb_context) +{ + struct microread_info *info = nfc_hci_get_clientdata(hdev); + u8 control_bits; + u16 crc; + + pr_info("data exchange to gate 0x%x\n", target->hci_reader_gate); + + if (target->hci_reader_gate == MICROREAD_GATE_ID_P2P_INITIATOR) { + *(u8 *)skb_push(skb, 1) = 0; + + return nfc_hci_send_event(hdev, target->hci_reader_gate, + MICROREAD_EVT_P2P_INITIATOR_EXCHANGE_TO_RF, + skb->data, skb->len); + } + + switch (target->hci_reader_gate) { + case MICROREAD_GATE_ID_MREAD_ISO_A: + control_bits = 0xCB; + break; + case MICROREAD_GATE_ID_MREAD_ISO_A_3: + control_bits = 0xCB; + break; + case MICROREAD_GATE_ID_MREAD_ISO_B: + control_bits = 0xCB; + break; + case MICROREAD_GATE_ID_MREAD_NFC_T1: + control_bits = 0x1B; + + crc = crc_ccitt(0xffff, skb->data, skb->len); + crc = ~crc; + skb_put_u8(skb, crc & 0xff); + skb_put_u8(skb, crc >> 8); + break; + case MICROREAD_GATE_ID_MREAD_NFC_T3: + control_bits = 0xDB; + break; + default: + pr_info("Abort im_transceive to invalid gate 0x%x\n", + target->hci_reader_gate); + return 1; + } + + *(u8 *)skb_push(skb, 1) = control_bits; + + info->async_cb_type = MICROREAD_CB_TYPE_READER_ALL; + info->async_cb = cb; + info->async_cb_context = cb_context; + + return nfc_hci_send_cmd_async(hdev, target->hci_reader_gate, + MICROREAD_CMD_MREAD_EXCHANGE, + skb->data, skb->len, + microread_im_transceive_cb, info); +} + +static int microread_tm_send(struct nfc_hci_dev *hdev, struct sk_buff *skb) +{ + int r; + + r = nfc_hci_send_event(hdev, MICROREAD_GATE_ID_P2P_TARGET, + MICROREAD_EVT_MCARD_EXCHANGE, + skb->data, skb->len); + + kfree_skb(skb); + + return r; +} + +static void microread_target_discovered(struct nfc_hci_dev *hdev, u8 gate, + struct sk_buff *skb) +{ + struct nfc_target *targets; + int r = 0; + + pr_info("target discovered to gate 0x%x\n", gate); + + targets = kzalloc_obj(struct nfc_target); + if (targets == NULL) { + r = -ENOMEM; + goto exit; + } + + targets->hci_reader_gate = gate; + + switch (gate) { + case MICROREAD_GATE_ID_MREAD_ISO_A: + if (skb->len <= MICROREAD_EMCF_A_LEN) { + r = -EINVAL; + goto exit_free; + } + + targets->supported_protocols = + nfc_hci_sak_to_protocol(skb->data[MICROREAD_EMCF_A_SAK]); + targets->sens_res = + be16_to_cpu(*(u16 *)&skb->data[MICROREAD_EMCF_A_ATQA]); + targets->sel_res = skb->data[MICROREAD_EMCF_A_SAK]; + targets->nfcid1_len = skb->data[MICROREAD_EMCF_A_LEN]; + if (targets->nfcid1_len > sizeof(targets->nfcid1) || + targets->nfcid1_len > skb->len - MICROREAD_EMCF_A_UID) { + r = -EINVAL; + goto exit_free; + } + memcpy(targets->nfcid1, &skb->data[MICROREAD_EMCF_A_UID], + targets->nfcid1_len); + break; + case MICROREAD_GATE_ID_MREAD_ISO_A_3: + if (skb->len <= MICROREAD_EMCF_A3_LEN) { + r = -EINVAL; + goto exit_free; + } + + targets->supported_protocols = + nfc_hci_sak_to_protocol(skb->data[MICROREAD_EMCF_A3_SAK]); + targets->sens_res = + be16_to_cpu(*(u16 *)&skb->data[MICROREAD_EMCF_A3_ATQA]); + targets->sel_res = skb->data[MICROREAD_EMCF_A3_SAK]; + targets->nfcid1_len = skb->data[MICROREAD_EMCF_A3_LEN]; + if (targets->nfcid1_len > sizeof(targets->nfcid1) || + targets->nfcid1_len > skb->len - MICROREAD_EMCF_A3_UID) { + r = -EINVAL; + goto exit_free; + } + memcpy(targets->nfcid1, &skb->data[MICROREAD_EMCF_A3_UID], + targets->nfcid1_len); + break; + case MICROREAD_GATE_ID_MREAD_ISO_B: + if (skb->len < MICROREAD_EMCF_B_UID + 4) { + r = -EINVAL; + goto exit_free; + } + + targets->supported_protocols = NFC_PROTO_ISO14443_B_MASK; + memcpy(targets->nfcid1, &skb->data[MICROREAD_EMCF_B_UID], 4); + targets->nfcid1_len = 4; + break; + case MICROREAD_GATE_ID_MREAD_NFC_T1: + if (skb->len < MICROREAD_EMCF_T1_UID + 4) { + r = -EINVAL; + goto exit_free; + } + + targets->supported_protocols = NFC_PROTO_JEWEL_MASK; + targets->sens_res = + le16_to_cpu(*(u16 *)&skb->data[MICROREAD_EMCF_T1_ATQA]); + memcpy(targets->nfcid1, &skb->data[MICROREAD_EMCF_T1_UID], 4); + targets->nfcid1_len = 4; + break; + case MICROREAD_GATE_ID_MREAD_NFC_T3: + if (skb->len < MICROREAD_EMCF_T3_UID + 8) { + r = -EINVAL; + goto exit_free; + } + + targets->supported_protocols = NFC_PROTO_FELICA_MASK; + memcpy(targets->nfcid1, &skb->data[MICROREAD_EMCF_T3_UID], 8); + targets->nfcid1_len = 8; + break; + default: + pr_info("discard target discovered to gate 0x%x\n", gate); + goto exit_free; + } + + r = nfc_targets_found(hdev->ndev, targets, 1); + +exit_free: + kfree(targets); + +exit: + kfree_skb(skb); + + if (r) + pr_err("Failed to handle discovered target err=%d\n", r); +} + +static int microread_event_received(struct nfc_hci_dev *hdev, u8 pipe, + u8 event, struct sk_buff *skb) +{ + int r; + u8 gate = hdev->pipes[pipe].gate; + u8 mode; + + pr_info("Microread received event 0x%x to gate 0x%x\n", event, gate); + + switch (event) { + case MICROREAD_EVT_MREAD_CARD_FOUND: + microread_target_discovered(hdev, gate, skb); + return 0; + + case MICROREAD_EVT_P2P_INITIATOR_EXCHANGE_FROM_RF: + if (skb->len < 1) { + kfree_skb(skb); + return -EPROTO; + } + + if (skb->data[skb->len - 1]) { + kfree_skb(skb); + return -EIO; + } + + skb_trim(skb, skb->len - 1); + + r = nfc_tm_data_received(hdev->ndev, skb); + break; + + case MICROREAD_EVT_MCARD_FIELD_ON: + case MICROREAD_EVT_MCARD_FIELD_OFF: + kfree_skb(skb); + return 0; + + case MICROREAD_EVT_P2P_TARGET_ACTIVATED: + r = nfc_tm_activated(hdev->ndev, NFC_PROTO_NFC_DEP_MASK, + NFC_COMM_PASSIVE, skb->data, + skb->len); + + kfree_skb(skb); + break; + + case MICROREAD_EVT_MCARD_EXCHANGE: + if (skb->len < 1) { + kfree_skb(skb); + return -EPROTO; + } + + if (skb->data[skb->len-1]) { + kfree_skb(skb); + return -EIO; + } + + skb_trim(skb, skb->len - 1); + + r = nfc_tm_data_received(hdev->ndev, skb); + break; + + case MICROREAD_EVT_P2P_TARGET_DEACTIVATED: + kfree_skb(skb); + + mode = 0xff; + r = nfc_hci_set_param(hdev, MICROREAD_GATE_ID_P2P_TARGET, + MICROREAD_PAR_P2P_TARGET_MODE, &mode, 1); + if (r) + break; + + r = nfc_hci_send_event(hdev, gate, + MICROREAD_EVT_MREAD_DISCOVERY_STOP, NULL, + 0); + break; + + default: + return 1; + } + + return r; +} + +static const struct nfc_hci_ops microread_hci_ops = { + .open = microread_open, + .close = microread_close, + .hci_ready = microread_hci_ready, + .xmit = microread_xmit, + .start_poll = microread_start_poll, + .dep_link_up = microread_dep_link_up, + .dep_link_down = microread_dep_link_down, + .target_from_gate = microread_target_from_gate, + .complete_target_discovered = microread_complete_target_discovered, + .im_transceive = microread_im_transceive, + .tm_send = microread_tm_send, + .check_presence = NULL, + .event_received = microread_event_received, +}; + +int microread_probe(void *phy_id, const struct nfc_phy_ops *phy_ops, + const char *llc_name, int phy_headroom, int phy_tailroom, + int phy_payload, struct nfc_hci_dev **hdev) +{ + struct microread_info *info; + unsigned long quirks = 0; + u32 protocols; + struct nfc_hci_init_data init_data; + int r; + + info = kzalloc_obj(struct microread_info); + if (!info) { + r = -ENOMEM; + goto err_info_alloc; + } + + info->phy_ops = phy_ops; + info->phy_id = phy_id; + + init_data.gate_count = ARRAY_SIZE(microread_gates); + memcpy(init_data.gates, microread_gates, sizeof(microread_gates)); + + strcpy(init_data.session_id, "MICROREA"); + + set_bit(NFC_HCI_QUIRK_SHORT_CLEAR, &quirks); + + protocols = NFC_PROTO_JEWEL_MASK | + NFC_PROTO_MIFARE_MASK | + NFC_PROTO_FELICA_MASK | + NFC_PROTO_ISO14443_MASK | + NFC_PROTO_ISO14443_B_MASK | + NFC_PROTO_NFC_DEP_MASK; + + info->hdev = nfc_hci_allocate_device(µread_hci_ops, &init_data, + quirks, protocols, llc_name, + phy_headroom + + MICROREAD_CMDS_HEADROOM, + phy_tailroom + + MICROREAD_CMD_TAILROOM, + phy_payload); + if (!info->hdev) { + pr_err("Cannot allocate nfc hdev\n"); + r = -ENOMEM; + goto err_alloc_hdev; + } + + nfc_hci_set_clientdata(info->hdev, info); + + r = nfc_hci_register_device(info->hdev); + if (r) + goto err_regdev; + + *hdev = info->hdev; + + return 0; + +err_regdev: + nfc_hci_free_device(info->hdev); + +err_alloc_hdev: + kfree(info); + +err_info_alloc: + return r; +} +EXPORT_SYMBOL(microread_probe); + +void microread_remove(struct nfc_hci_dev *hdev) +{ + struct microread_info *info = nfc_hci_get_clientdata(hdev); + + nfc_hci_unregister_device(hdev); + nfc_hci_free_device(hdev); + kfree(info); +} +EXPORT_SYMBOL(microread_remove); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION(DRIVER_DESC); diff --git a/drivers/nfc/microread/microread.h b/drivers/nfc/microread/microread.h new file mode 100644 index 000000000..2ee7ccfa2 --- /dev/null +++ b/drivers/nfc/microread/microread.h @@ -0,0 +1,19 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * Copyright (C) 2011 - 2012 Intel Corporation. All rights reserved. + */ + +#ifndef __LOCAL_MICROREAD_H_ +#define __LOCAL_MICROREAD_H_ + +#include + +#define DRIVER_DESC "NFC driver for microread" + +int microread_probe(void *phy_id, const struct nfc_phy_ops *phy_ops, + const char *llc_name, int phy_headroom, int phy_tailroom, + int phy_payload, struct nfc_hci_dev **hdev); + +void microread_remove(struct nfc_hci_dev *hdev); + +#endif /* __LOCAL_MICROREAD_H_ */ -- cgit v1.3.1