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 mutex_lock(&wl->mutex); 23 len = sysfs_emit(buf, "%d\n\n0 - off\n1 - on\n", wl->sg_enabled); 24 mutex_unlock(&wl->mutex); 25 26 return len; 27 28 } 29 30 static ssize_t bt_coex_state_store(struct device *dev, 31 struct device_attribute *attr, 32 const char *buf, size_t count) 33 { 34 struct wl1271 *wl = dev_get_drvdata(dev); 35 unsigned long res; 36 int ret; 37 38 ret = kstrtoul(buf, 10, &res); 39 if (ret < 0) { 40 wl1271_warning("incorrect value written to bt_coex_mode"); 41 return count; 42 } 43 44 mutex_lock(&wl->mutex); 45 46 res = !!res; 47 48 if (res == wl->sg_enabled) 49 goto out; 50 51 wl->sg_enabled = res; 52 53 if (unlikely(wl->state != WLCORE_STATE_ON)) 54 goto out; 55 56 ret = pm_runtime_resume_and_get(wl->dev); 57 if (ret < 0) 58 goto out; 59 60 wl1271_acx_sg_enable(wl, wl->sg_enabled); 61 pm_runtime_put_autosuspend(wl->dev); 62 63 out: 64 mutex_unlock(&wl->mutex); 65 return count; 66 } 67 68 static DEVICE_ATTR_RW(bt_coex_state); 69 70 static ssize_t hw_pg_ver_show(struct device *dev, 71 struct device_attribute *attr, 72 char *buf) 73 { 74 struct wl1271 *wl = dev_get_drvdata(dev); 75 ssize_t len; 76 77 mutex_lock(&wl->mutex); 78 if (wl->hw_pg_ver >= 0) 79 len = sysfs_emit(buf, "%d\n", wl->hw_pg_ver); 80 else 81 len = sysfs_emit(buf, "n/a\n"); 82 mutex_unlock(&wl->mutex); 83 84 return len; 85 } 86 87 static DEVICE_ATTR_RO(hw_pg_ver); 88 89 static ssize_t wl1271_sysfs_read_fwlog(struct file *filp, struct kobject *kobj, 90 const struct bin_attribute *bin_attr, 91 char *buffer, loff_t pos, size_t count) 92 { 93 struct device *dev = kobj_to_dev(kobj); 94 struct wl1271 *wl = dev_get_drvdata(dev); 95 ssize_t len; 96 int ret; 97 98 ret = mutex_lock_interruptible(&wl->mutex); 99 if (ret < 0) 100 return -ERESTARTSYS; 101 102 /* Check if the fwlog is still valid */ 103 if (wl->fwlog_size < 0) { 104 mutex_unlock(&wl->mutex); 105 return 0; 106 } 107 108 /* Seeking is not supported - old logs are not kept. Disregard pos. */ 109 len = min_t(size_t, count, wl->fwlog_size); 110 wl->fwlog_size -= len; 111 memcpy(buffer, wl->fwlog, len); 112 113 /* Make room for new messages */ 114 memmove(wl->fwlog, wl->fwlog + len, wl->fwlog_size); 115 116 mutex_unlock(&wl->mutex); 117 118 return len; 119 } 120 121 static const struct bin_attribute fwlog_attr = { 122 .attr = { .name = "fwlog", .mode = 0400 }, 123 .read = wl1271_sysfs_read_fwlog, 124 }; 125 126 int wlcore_sysfs_init(struct wl1271 *wl) 127 { 128 int ret; 129 130 /* Create sysfs file to control bt coex state */ 131 ret = device_create_file(wl->dev, &dev_attr_bt_coex_state); 132 if (ret < 0) { 133 wl1271_error("failed to create sysfs file bt_coex_state"); 134 goto out; 135 } 136 137 /* Create sysfs file to get HW PG version */ 138 ret = device_create_file(wl->dev, &dev_attr_hw_pg_ver); 139 if (ret < 0) { 140 wl1271_error("failed to create sysfs file hw_pg_ver"); 141 goto out_bt_coex_state; 142 } 143 144 /* Create sysfs file for the FW log */ 145 ret = device_create_bin_file(wl->dev, &fwlog_attr); 146 if (ret < 0) { 147 wl1271_error("failed to create sysfs file fwlog"); 148 goto out_hw_pg_ver; 149 } 150 151 goto out; 152 153 out_hw_pg_ver: 154 device_remove_file(wl->dev, &dev_attr_hw_pg_ver); 155 156 out_bt_coex_state: 157 device_remove_file(wl->dev, &dev_attr_bt_coex_state); 158 159 out: 160 return ret; 161 } 162 163 void wlcore_sysfs_free(struct wl1271 *wl) 164 { 165 device_remove_bin_file(wl->dev, &fwlog_attr); 166 167 device_remove_file(wl->dev, &dev_attr_hw_pg_ver); 168 169 device_remove_file(wl->dev, &dev_attr_bt_coex_state); 170 } 171