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 bt_coex_state_show(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 bt_coex_state_store(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_RW(bt_coex_state); 75 76 static ssize_t hw_pg_ver_show(struct device *dev, 77 struct device_attribute *attr, 78 char *buf) 79 { 80 struct wl1271 *wl = dev_get_drvdata(dev); 81 ssize_t len; 82 83 len = PAGE_SIZE; 84 85 mutex_lock(&wl->mutex); 86 if (wl->hw_pg_ver >= 0) 87 len = snprintf(buf, len, "%d\n", wl->hw_pg_ver); 88 else 89 len = snprintf(buf, len, "n/a\n"); 90 mutex_unlock(&wl->mutex); 91 92 return len; 93 } 94 95 static DEVICE_ATTR_RO(hw_pg_ver); 96 97 static ssize_t wl1271_sysfs_read_fwlog(struct file *filp, struct kobject *kobj, 98 struct bin_attribute *bin_attr, 99 char *buffer, loff_t pos, size_t count) 100 { 101 struct device *dev = kobj_to_dev(kobj); 102 struct wl1271 *wl = dev_get_drvdata(dev); 103 ssize_t len; 104 int ret; 105 106 ret = mutex_lock_interruptible(&wl->mutex); 107 if (ret < 0) 108 return -ERESTARTSYS; 109 110 /* Check if the fwlog is still valid */ 111 if (wl->fwlog_size < 0) { 112 mutex_unlock(&wl->mutex); 113 return 0; 114 } 115 116 /* Seeking is not supported - old logs are not kept. Disregard pos. */ 117 len = min_t(size_t, count, wl->fwlog_size); 118 wl->fwlog_size -= len; 119 memcpy(buffer, wl->fwlog, len); 120 121 /* Make room for new messages */ 122 memmove(wl->fwlog, wl->fwlog + len, wl->fwlog_size); 123 124 mutex_unlock(&wl->mutex); 125 126 return len; 127 } 128 129 static const struct bin_attribute fwlog_attr = { 130 .attr = { .name = "fwlog", .mode = 0400 }, 131 .read = wl1271_sysfs_read_fwlog, 132 }; 133 134 int wlcore_sysfs_init(struct wl1271 *wl) 135 { 136 int ret; 137 138 /* Create sysfs file to control bt coex state */ 139 ret = device_create_file(wl->dev, &dev_attr_bt_coex_state); 140 if (ret < 0) { 141 wl1271_error("failed to create sysfs file bt_coex_state"); 142 goto out; 143 } 144 145 /* Create sysfs file to get HW PG version */ 146 ret = device_create_file(wl->dev, &dev_attr_hw_pg_ver); 147 if (ret < 0) { 148 wl1271_error("failed to create sysfs file hw_pg_ver"); 149 goto out_bt_coex_state; 150 } 151 152 /* Create sysfs file for the FW log */ 153 ret = device_create_bin_file(wl->dev, &fwlog_attr); 154 if (ret < 0) { 155 wl1271_error("failed to create sysfs file fwlog"); 156 goto out_hw_pg_ver; 157 } 158 159 goto out; 160 161 out_hw_pg_ver: 162 device_remove_file(wl->dev, &dev_attr_hw_pg_ver); 163 164 out_bt_coex_state: 165 device_remove_file(wl->dev, &dev_attr_bt_coex_state); 166 167 out: 168 return ret; 169 } 170 171 void wlcore_sysfs_free(struct wl1271 *wl) 172 { 173 device_remove_bin_file(wl->dev, &fwlog_attr); 174 175 device_remove_file(wl->dev, &dev_attr_hw_pg_ver); 176 177 device_remove_file(wl->dev, &dev_attr_bt_coex_state); 178 } 179