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_resume_and_get(wl->dev); 60 if (ret < 0) 61 goto out; 62 63 wl1271_acx_sg_enable(wl, wl->sg_enabled); 64 pm_runtime_mark_last_busy(wl->dev); 65 pm_runtime_put_autosuspend(wl->dev); 66 67 out: 68 mutex_unlock(&wl->mutex); 69 return count; 70 } 71 72 static DEVICE_ATTR_RW(bt_coex_state); 73 74 static ssize_t hw_pg_ver_show(struct device *dev, 75 struct device_attribute *attr, 76 char *buf) 77 { 78 struct wl1271 *wl = dev_get_drvdata(dev); 79 ssize_t len; 80 81 len = PAGE_SIZE; 82 83 mutex_lock(&wl->mutex); 84 if (wl->hw_pg_ver >= 0) 85 len = snprintf(buf, len, "%d\n", wl->hw_pg_ver); 86 else 87 len = snprintf(buf, len, "n/a\n"); 88 mutex_unlock(&wl->mutex); 89 90 return len; 91 } 92 93 static DEVICE_ATTR_RO(hw_pg_ver); 94 95 static ssize_t wl1271_sysfs_read_fwlog(struct file *filp, struct kobject *kobj, 96 struct bin_attribute *bin_attr, 97 char *buffer, loff_t pos, size_t count) 98 { 99 struct device *dev = kobj_to_dev(kobj); 100 struct wl1271 *wl = dev_get_drvdata(dev); 101 ssize_t len; 102 int ret; 103 104 ret = mutex_lock_interruptible(&wl->mutex); 105 if (ret < 0) 106 return -ERESTARTSYS; 107 108 /* Check if the fwlog is still valid */ 109 if (wl->fwlog_size < 0) { 110 mutex_unlock(&wl->mutex); 111 return 0; 112 } 113 114 /* Seeking is not supported - old logs are not kept. Disregard pos. */ 115 len = min_t(size_t, count, wl->fwlog_size); 116 wl->fwlog_size -= len; 117 memcpy(buffer, wl->fwlog, len); 118 119 /* Make room for new messages */ 120 memmove(wl->fwlog, wl->fwlog + len, wl->fwlog_size); 121 122 mutex_unlock(&wl->mutex); 123 124 return len; 125 } 126 127 static const struct bin_attribute fwlog_attr = { 128 .attr = { .name = "fwlog", .mode = 0400 }, 129 .read = wl1271_sysfs_read_fwlog, 130 }; 131 132 int wlcore_sysfs_init(struct wl1271 *wl) 133 { 134 int ret; 135 136 /* Create sysfs file to control bt coex state */ 137 ret = device_create_file(wl->dev, &dev_attr_bt_coex_state); 138 if (ret < 0) { 139 wl1271_error("failed to create sysfs file bt_coex_state"); 140 goto out; 141 } 142 143 /* Create sysfs file to get HW PG version */ 144 ret = device_create_file(wl->dev, &dev_attr_hw_pg_ver); 145 if (ret < 0) { 146 wl1271_error("failed to create sysfs file hw_pg_ver"); 147 goto out_bt_coex_state; 148 } 149 150 /* Create sysfs file for the FW log */ 151 ret = device_create_bin_file(wl->dev, &fwlog_attr); 152 if (ret < 0) { 153 wl1271_error("failed to create sysfs file fwlog"); 154 goto out_hw_pg_ver; 155 } 156 157 goto out; 158 159 out_hw_pg_ver: 160 device_remove_file(wl->dev, &dev_attr_hw_pg_ver); 161 162 out_bt_coex_state: 163 device_remove_file(wl->dev, &dev_attr_bt_coex_state); 164 165 out: 166 return ret; 167 } 168 169 void wlcore_sysfs_free(struct wl1271 *wl) 170 { 171 device_remove_bin_file(wl->dev, &fwlog_attr); 172 173 device_remove_file(wl->dev, &dev_attr_hw_pg_ver); 174 175 device_remove_file(wl->dev, &dev_attr_bt_coex_state); 176 } 177