^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) * Initialization protocol for ISHTP driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (c) 2003-2016, Intel Corporation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/export.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include "ishtp-dev.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include "hbm.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include "client.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) * ishtp_dev_state_str() -Convert to string format
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) * @state: state to convert
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) * Convert state to string for prints
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) * Return: character pointer to converted string
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) const char *ishtp_dev_state_str(int state)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) switch (state) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) case ISHTP_DEV_INITIALIZING:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) return "INITIALIZING";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) case ISHTP_DEV_INIT_CLIENTS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) return "INIT_CLIENTS";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) case ISHTP_DEV_ENABLED:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) return "ENABLED";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) case ISHTP_DEV_RESETTING:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) return "RESETTING";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) case ISHTP_DEV_DISABLED:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) return "DISABLED";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) case ISHTP_DEV_POWER_DOWN:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) return "POWER_DOWN";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) case ISHTP_DEV_POWER_UP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) return "POWER_UP";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) return "unknown";
^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) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) * ishtp_device_init() - ishtp device init
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) * @dev: ISHTP device instance
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) * After ISHTP device is alloacted, this function is used to initialize
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) * each field which includes spin lock, work struct and lists
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) void ishtp_device_init(struct ishtp_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) dev->dev_state = ISHTP_DEV_INITIALIZING;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) INIT_LIST_HEAD(&dev->cl_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) INIT_LIST_HEAD(&dev->device_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) dev->rd_msg_fifo_head = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) dev->rd_msg_fifo_tail = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) spin_lock_init(&dev->rd_msg_spinlock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) init_waitqueue_head(&dev->wait_hbm_recvd_msg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) spin_lock_init(&dev->read_list_spinlock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) spin_lock_init(&dev->device_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) spin_lock_init(&dev->device_list_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) spin_lock_init(&dev->cl_list_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) spin_lock_init(&dev->fw_clients_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) INIT_WORK(&dev->bh_hbm_work, bh_hbm_work_fn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) bitmap_zero(dev->host_clients_map, ISHTP_CLIENTS_MAX);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) dev->open_handle_count = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) * Reserving client ID 0 for ISHTP Bus Message communications
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) bitmap_set(dev->host_clients_map, 0, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) INIT_LIST_HEAD(&dev->read_list.list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) EXPORT_SYMBOL(ishtp_device_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) * ishtp_start() - Start ISH processing
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) * @dev: ISHTP device instance
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) * Start ISHTP processing by sending query subscriber message
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) * Return: 0 on success else -ENODEV
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) int ishtp_start(struct ishtp_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) if (ishtp_hbm_start_wait(dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) dev_err(dev->devc, "HBM haven't started");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) /* suspend & resume notification - send QUERY_SUBSCRIBERS msg */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) ishtp_query_subscribers(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) dev_err(dev->devc, "link layer initialization failed.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) dev->dev_state = ISHTP_DEV_DISABLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) EXPORT_SYMBOL(ishtp_start);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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