yuezonghe | 824eb0c | 2024-06-27 02:32:26 -0700 | [diff] [blame] | 1 | /* ATM driver model support. */ |
| 2 | |
| 3 | #include <linux/kernel.h> |
| 4 | #include <linux/slab.h> |
| 5 | #include <linux/init.h> |
| 6 | #include <linux/kobject.h> |
| 7 | #include <linux/atmdev.h> |
| 8 | #include "common.h" |
| 9 | #include "resources.h" |
| 10 | |
| 11 | #define to_atm_dev(cldev) container_of(cldev, struct atm_dev, class_dev) |
| 12 | |
| 13 | static ssize_t show_type(struct device *cdev, |
| 14 | struct device_attribute *attr, char *buf) |
| 15 | { |
| 16 | struct atm_dev *adev = to_atm_dev(cdev); |
| 17 | return sprintf(buf, "%s\n", adev->type); |
| 18 | } |
| 19 | |
| 20 | static ssize_t show_address(struct device *cdev, |
| 21 | struct device_attribute *attr, char *buf) |
| 22 | { |
| 23 | char *pos = buf; |
| 24 | struct atm_dev *adev = to_atm_dev(cdev); |
| 25 | int i; |
| 26 | |
| 27 | for (i = 0; i < (ESI_LEN - 1); i++) |
| 28 | pos += sprintf(pos, "%02x:", adev->esi[i]); |
| 29 | pos += sprintf(pos, "%02x\n", adev->esi[i]); |
| 30 | |
| 31 | return pos - buf; |
| 32 | } |
| 33 | |
| 34 | static ssize_t show_atmaddress(struct device *cdev, |
| 35 | struct device_attribute *attr, char *buf) |
| 36 | { |
| 37 | unsigned long flags; |
| 38 | char *pos = buf; |
| 39 | struct atm_dev *adev = to_atm_dev(cdev); |
| 40 | struct atm_dev_addr *aaddr; |
| 41 | int bin[] = { 1, 2, 10, 6, 1 }, *fmt = bin; |
| 42 | int i, j; |
| 43 | |
| 44 | spin_lock_irqsave(&adev->lock, flags); |
| 45 | list_for_each_entry(aaddr, &adev->local, entry) { |
| 46 | for (i = 0, j = 0; i < ATM_ESA_LEN; ++i, ++j) { |
| 47 | if (j == *fmt) { |
| 48 | pos += sprintf(pos, "."); |
| 49 | ++fmt; |
| 50 | j = 0; |
| 51 | } |
| 52 | pos += sprintf(pos, "%02x", |
| 53 | aaddr->addr.sas_addr.prv[i]); |
| 54 | } |
| 55 | pos += sprintf(pos, "\n"); |
| 56 | } |
| 57 | spin_unlock_irqrestore(&adev->lock, flags); |
| 58 | |
| 59 | return pos - buf; |
| 60 | } |
| 61 | |
| 62 | static ssize_t show_atmindex(struct device *cdev, |
| 63 | struct device_attribute *attr, char *buf) |
| 64 | { |
| 65 | struct atm_dev *adev = to_atm_dev(cdev); |
| 66 | |
| 67 | return sprintf(buf, "%d\n", adev->number); |
| 68 | } |
| 69 | |
| 70 | static ssize_t show_carrier(struct device *cdev, |
| 71 | struct device_attribute *attr, char *buf) |
| 72 | { |
| 73 | char *pos = buf; |
| 74 | struct atm_dev *adev = to_atm_dev(cdev); |
| 75 | |
| 76 | pos += sprintf(pos, "%d\n", |
| 77 | adev->signal == ATM_PHY_SIG_LOST ? 0 : 1); |
| 78 | |
| 79 | return pos - buf; |
| 80 | } |
| 81 | |
| 82 | static ssize_t show_link_rate(struct device *cdev, |
| 83 | struct device_attribute *attr, char *buf) |
| 84 | { |
| 85 | char *pos = buf; |
| 86 | struct atm_dev *adev = to_atm_dev(cdev); |
| 87 | int link_rate; |
| 88 | |
| 89 | /* show the link rate, not the data rate */ |
| 90 | switch (adev->link_rate) { |
| 91 | case ATM_OC3_PCR: |
| 92 | link_rate = 155520000; |
| 93 | break; |
| 94 | case ATM_OC12_PCR: |
| 95 | link_rate = 622080000; |
| 96 | break; |
| 97 | case ATM_25_PCR: |
| 98 | link_rate = 25600000; |
| 99 | break; |
| 100 | default: |
| 101 | link_rate = adev->link_rate * 8 * 53; |
| 102 | } |
| 103 | pos += sprintf(pos, "%d\n", link_rate); |
| 104 | |
| 105 | return pos - buf; |
| 106 | } |
| 107 | |
| 108 | static DEVICE_ATTR(address, S_IRUGO, show_address, NULL); |
| 109 | static DEVICE_ATTR(atmaddress, S_IRUGO, show_atmaddress, NULL); |
| 110 | static DEVICE_ATTR(atmindex, S_IRUGO, show_atmindex, NULL); |
| 111 | static DEVICE_ATTR(carrier, S_IRUGO, show_carrier, NULL); |
| 112 | static DEVICE_ATTR(type, S_IRUGO, show_type, NULL); |
| 113 | static DEVICE_ATTR(link_rate, S_IRUGO, show_link_rate, NULL); |
| 114 | |
| 115 | static struct device_attribute *atm_attrs[] = { |
| 116 | &dev_attr_atmaddress, |
| 117 | &dev_attr_address, |
| 118 | &dev_attr_atmindex, |
| 119 | &dev_attr_carrier, |
| 120 | &dev_attr_type, |
| 121 | &dev_attr_link_rate, |
| 122 | NULL |
| 123 | }; |
| 124 | |
| 125 | |
| 126 | static int atm_uevent(struct device *cdev, struct kobj_uevent_env *env) |
| 127 | { |
| 128 | struct atm_dev *adev; |
| 129 | |
| 130 | if (!cdev) |
| 131 | return -ENODEV; |
| 132 | |
| 133 | adev = to_atm_dev(cdev); |
| 134 | if (!adev) |
| 135 | return -ENODEV; |
| 136 | |
| 137 | if (add_uevent_var(env, "NAME=%s%d", adev->type, adev->number)) |
| 138 | return -ENOMEM; |
| 139 | |
| 140 | return 0; |
| 141 | } |
| 142 | |
| 143 | static void atm_release(struct device *cdev) |
| 144 | { |
| 145 | struct atm_dev *adev = to_atm_dev(cdev); |
| 146 | |
| 147 | kfree(adev); |
| 148 | } |
| 149 | |
| 150 | static struct class atm_class = { |
| 151 | .name = "atm", |
| 152 | .dev_release = atm_release, |
| 153 | .dev_uevent = atm_uevent, |
| 154 | }; |
| 155 | |
| 156 | int atm_register_sysfs(struct atm_dev *adev, struct device *parent) |
| 157 | { |
| 158 | struct device *cdev = &adev->class_dev; |
| 159 | int i, j, err; |
| 160 | |
| 161 | cdev->class = &atm_class; |
| 162 | cdev->parent = parent; |
| 163 | dev_set_drvdata(cdev, adev); |
| 164 | |
| 165 | dev_set_name(cdev, "%s%d", adev->type, adev->number); |
| 166 | err = device_register(cdev); |
| 167 | if (err < 0) |
| 168 | return err; |
| 169 | |
| 170 | for (i = 0; atm_attrs[i]; i++) { |
| 171 | err = device_create_file(cdev, atm_attrs[i]); |
| 172 | if (err) |
| 173 | goto err_out; |
| 174 | } |
| 175 | |
| 176 | return 0; |
| 177 | |
| 178 | err_out: |
| 179 | for (j = 0; j < i; j++) |
| 180 | device_remove_file(cdev, atm_attrs[j]); |
| 181 | device_del(cdev); |
| 182 | return err; |
| 183 | } |
| 184 | |
| 185 | void atm_unregister_sysfs(struct atm_dev *adev) |
| 186 | { |
| 187 | struct device *cdev = &adev->class_dev; |
| 188 | |
| 189 | device_del(cdev); |
| 190 | } |
| 191 | |
| 192 | int __init atm_sysfs_init(void) |
| 193 | { |
| 194 | return class_register(&atm_class); |
| 195 | } |
| 196 | |
| 197 | void __exit atm_sysfs_exit(void) |
| 198 | { |
| 199 | class_unregister(&atm_class); |
| 200 | } |