1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * This file is part of wlcore 4 * 5 * Copyright (C) 2013 Texas Instruments Inc. 6 */ 7 8 #include <linux/pm_runtime.h> 9 10 #include "acx.h" 11 #include "wlcore.h" 12 #include "debug.h" 13 #include "sysfs.h" 14 15 static ssize_t wl1271_sysfs_show_bt_coex_state(struct device *dev, 16 struct device_attribute *attr, 17 char *buf) 18 { 19 struct wl1271 *wl = dev_get_drvdata(dev); 20 ssize_t len; 21 22 len = PAGE_SIZE; 23 24 mutex_lock(&wl->mutex); 25 len = snprintf(buf, len, "%d\n\n0 - off\n1 - on\n", 26 wl->sg_enabled); 27 mutex_unlock(&wl->mutex); 28 29 return len; 30 31 } 32 33 static ssize_t wl1271_sysfs_store_bt_coex_state(struct device *dev, 34 struct device_attribute *attr, 35 const char *buf, size_t count) 36 { 37 struct wl1271 *wl = dev_get_drvdata(dev); 38 unsigned long res; 39 int ret; 40 41 ret = kstrtoul(buf, 10, &res); 42 if (ret < 0) { 43 wl1271_warning("incorrect value written to bt_coex_mode"); 44 return count; 45 } 46 47 mutex_lock(&wl->mutex); 48 49 res = !!res; 50 51 if (res == wl->sg_enabled) 52 goto out; 53 54 wl->sg_enabled = res; 55 56 if (unlikely(wl->state != WLCORE_STATE_ON)) 57 goto out; 58 59 ret = pm_runtime_get_sync(wl->dev); 60 if (ret < 0) { 61 pm_runtime_put_noidle(wl->dev); 62 goto out; 63 } 64 65 wl1271_acx_sg_enable(wl, wl->sg_enabled); 66 pm_runtime_mark_last_busy(wl->dev); 67 pm_runtime_put_autosuspend(wl->dev); 68 69 out: 70 mutex_unlock(&wl->mutex); 71 return count; 72 } 73 74 static DEVICE_ATTR(bt_coex_state, 0644, 75 wl1271_sysfs_show_bt_coex_state, 76 wl1271_sysfs_store_bt_coex_state); 77 78 static ssize_t wl1271_sysfs_show_hw_pg_ver(struct device *dev, 79 struct device_attribute *attr, 80 char *buf) 81 { 82 struct wl1271 *wl = dev_get_drvdata(dev); 83 ssize_t len; 84 85 len = PAGE_SIZE; 86 87 mutex_lock(&wl->mutex); 88 if (wl->hw_pg_ver >= 0) 89 len = snprintf(buf, len, "%d\n", wl->hw_pg_ver); 90 else 91 len = snprintf(buf, len, "n/a\n"); 92 mutex_unlock(&wl->mutex); 93 94 return len; 95 } 96 97 static DEVICE_ATTR(hw_pg_ver, 0444, wl1271_sysfs_show_hw_pg_ver, NULL); 98 99 static ssize_t wl1271_sysfs_read_fwlog(struct file *filp, struct kobject *kobj, 100 struct bin_attribute *bin_attr, 101 char *buffer, loff_t pos, size_t count) 102 { 103 struct device *dev = container_of(kobj, struct device, kobj); 104 struct wl1271 *wl = dev_get_drvdata(dev); 105 ssize_t len; 106 int ret; 107 108 ret = mutex_lock_interruptible(&wl->mutex); 109 if (ret < 0) 110 return -ERESTARTSYS; 111 112 /* Check if the fwlog is still valid */ 113 if (wl->fwlog_size < 0) { 114 mutex_unlock(&wl->mutex); 115 return 0; 116 } 117 118 /* Seeking is not supported - old logs are not kept. Disregard pos. */ 119 len = min_t(size_t, count, wl->fwlog_size); 120 wl->fwlog_size -= len; 121 memcpy(buffer, wl->fwlog, len); 122 123 /* Make room for new messages */ 124 memmove(wl->fwlog, wl->fwlog + len, wl->fwlog_size); 125 126 mutex_unlock(&wl->mutex); 127 128 return len; 129 } 130 131 static const struct bin_attribute fwlog_attr = { 132 .attr = { .name = "fwlog", .mode = 0400 }, 133 .read = wl1271_sysfs_read_fwlog, 134 }; 135 136 int wlcore_sysfs_init(struct wl1271 *wl) 137 { 138 int ret; 139 140 /* Create sysfs file to control bt coex state */ 141 ret = device_create_file(wl->dev, &dev_attr_bt_coex_state); 142 if (ret < 0) { 143 wl1271_error("failed to create sysfs file bt_coex_state"); 144 goto out; 145 } 146 147 /* Create sysfs file to get HW PG version */ 148 ret = device_create_file(wl->dev, &dev_attr_hw_pg_ver); 149 if (ret < 0) { 150 wl1271_error("failed to create sysfs file hw_pg_ver"); 151 goto out_bt_coex_state; 152 } 153 154 /* Create sysfs file for the FW log */ 155 ret = device_create_bin_file(wl->dev, &fwlog_attr); 156 if (ret < 0) { 157 wl1271_error("failed to create sysfs file fwlog"); 158 goto out_hw_pg_ver; 159 } 160 161 goto out; 162 163 out_hw_pg_ver: 164 device_remove_file(wl->dev, &dev_attr_hw_pg_ver); 165 166 out_bt_coex_state: 167 device_remove_file(wl->dev, &dev_attr_bt_coex_state); 168 169 out: 170 return ret; 171 } 172 173 void wlcore_sysfs_free(struct wl1271 *wl) 174 { 175 device_remove_bin_file(wl->dev, &fwlog_attr); 176 177 device_remove_file(wl->dev, &dev_attr_hw_pg_ver); 178 179 device_remove_file(wl->dev, &dev_attr_bt_coex_state); 180 } 181