Root/
| 1 | /* |
| 2 | * adummy.c: a dummy ATM driver |
| 3 | */ |
| 4 | |
| 5 | #include <linux/module.h> |
| 6 | #include <linux/kernel.h> |
| 7 | #include <linux/skbuff.h> |
| 8 | #include <linux/errno.h> |
| 9 | #include <linux/types.h> |
| 10 | #include <linux/string.h> |
| 11 | #include <linux/delay.h> |
| 12 | #include <linux/init.h> |
| 13 | #include <linux/mm.h> |
| 14 | #include <linux/timer.h> |
| 15 | #include <linux/interrupt.h> |
| 16 | #include <linux/slab.h> |
| 17 | #include <asm/io.h> |
| 18 | #include <asm/byteorder.h> |
| 19 | #include <asm/uaccess.h> |
| 20 | |
| 21 | #include <linux/atmdev.h> |
| 22 | #include <linux/atm.h> |
| 23 | #include <linux/sonet.h> |
| 24 | |
| 25 | /* version definition */ |
| 26 | |
| 27 | #define DRV_VERSION "1.0" |
| 28 | |
| 29 | #define DEV_LABEL "adummy" |
| 30 | |
| 31 | #define ADUMMY_DEV(dev) ((struct adummy_dev *) (dev)->dev_data) |
| 32 | |
| 33 | struct adummy_dev { |
| 34 | struct atm_dev *atm_dev; |
| 35 | |
| 36 | struct list_head entry; |
| 37 | }; |
| 38 | |
| 39 | /* globals */ |
| 40 | |
| 41 | static LIST_HEAD(adummy_devs); |
| 42 | |
| 43 | static ssize_t __set_signal(struct device *dev, |
| 44 | struct device_attribute *attr, |
| 45 | const char *buf, size_t len) |
| 46 | { |
| 47 | struct atm_dev *atm_dev = container_of(dev, struct atm_dev, class_dev); |
| 48 | int signal; |
| 49 | |
| 50 | if (sscanf(buf, "%d", &signal) == 1) { |
| 51 | |
| 52 | if (signal < ATM_PHY_SIG_LOST || signal > ATM_PHY_SIG_FOUND) |
| 53 | signal = ATM_PHY_SIG_UNKNOWN; |
| 54 | |
| 55 | atm_dev_signal_change(atm_dev, signal); |
| 56 | return 1; |
| 57 | } |
| 58 | return -EINVAL; |
| 59 | } |
| 60 | |
| 61 | static ssize_t __show_signal(struct device *dev, |
| 62 | struct device_attribute *attr, char *buf) |
| 63 | { |
| 64 | struct atm_dev *atm_dev = container_of(dev, struct atm_dev, class_dev); |
| 65 | return sprintf(buf, "%d\n", atm_dev->signal); |
| 66 | } |
| 67 | static DEVICE_ATTR(signal, 0644, __show_signal, __set_signal); |
| 68 | |
| 69 | static struct attribute *adummy_attrs[] = { |
| 70 | &dev_attr_signal.attr, |
| 71 | NULL |
| 72 | }; |
| 73 | |
| 74 | static struct attribute_group adummy_group_attrs = { |
| 75 | .name = NULL, /* We want them in dev's root folder */ |
| 76 | .attrs = adummy_attrs |
| 77 | }; |
| 78 | |
| 79 | static int __init |
| 80 | adummy_start(struct atm_dev *dev) |
| 81 | { |
| 82 | dev->ci_range.vpi_bits = 4; |
| 83 | dev->ci_range.vci_bits = 12; |
| 84 | |
| 85 | return 0; |
| 86 | } |
| 87 | |
| 88 | static int |
| 89 | adummy_open(struct atm_vcc *vcc) |
| 90 | { |
| 91 | short vpi = vcc->vpi; |
| 92 | int vci = vcc->vci; |
| 93 | |
| 94 | if (vci == ATM_VCI_UNSPEC || vpi == ATM_VPI_UNSPEC) |
| 95 | return 0; |
| 96 | |
| 97 | set_bit(ATM_VF_ADDR, &vcc->flags); |
| 98 | set_bit(ATM_VF_READY, &vcc->flags); |
| 99 | |
| 100 | return 0; |
| 101 | } |
| 102 | |
| 103 | static void |
| 104 | adummy_close(struct atm_vcc *vcc) |
| 105 | { |
| 106 | clear_bit(ATM_VF_READY, &vcc->flags); |
| 107 | clear_bit(ATM_VF_ADDR, &vcc->flags); |
| 108 | } |
| 109 | |
| 110 | static int |
| 111 | adummy_send(struct atm_vcc *vcc, struct sk_buff *skb) |
| 112 | { |
| 113 | if (vcc->pop) |
| 114 | vcc->pop(vcc, skb); |
| 115 | else |
| 116 | dev_kfree_skb_any(skb); |
| 117 | atomic_inc(&vcc->stats->tx); |
| 118 | |
| 119 | return 0; |
| 120 | } |
| 121 | |
| 122 | static int |
| 123 | adummy_proc_read(struct atm_dev *dev, loff_t *pos, char *page) |
| 124 | { |
| 125 | int left = *pos; |
| 126 | |
| 127 | if (!left--) |
| 128 | return sprintf(page, "version %s\n", DRV_VERSION); |
| 129 | |
| 130 | return 0; |
| 131 | } |
| 132 | |
| 133 | static struct atmdev_ops adummy_ops = |
| 134 | { |
| 135 | .open = adummy_open, |
| 136 | .close = adummy_close, |
| 137 | .send = adummy_send, |
| 138 | .proc_read = adummy_proc_read, |
| 139 | .owner = THIS_MODULE |
| 140 | }; |
| 141 | |
| 142 | static int __init adummy_init(void) |
| 143 | { |
| 144 | struct atm_dev *atm_dev; |
| 145 | struct adummy_dev *adummy_dev; |
| 146 | int err = 0; |
| 147 | |
| 148 | printk(KERN_ERR "adummy: version %s\n", DRV_VERSION); |
| 149 | |
| 150 | adummy_dev = kzalloc(sizeof(struct adummy_dev), |
| 151 | GFP_KERNEL); |
| 152 | if (!adummy_dev) { |
| 153 | printk(KERN_ERR DEV_LABEL ": kzalloc() failed\n"); |
| 154 | err = -ENOMEM; |
| 155 | goto out; |
| 156 | } |
| 157 | atm_dev = atm_dev_register(DEV_LABEL, NULL, &adummy_ops, -1, NULL); |
| 158 | if (!atm_dev) { |
| 159 | printk(KERN_ERR DEV_LABEL ": atm_dev_register() failed\n"); |
| 160 | err = -ENODEV; |
| 161 | goto out_kfree; |
| 162 | } |
| 163 | |
| 164 | adummy_dev->atm_dev = atm_dev; |
| 165 | atm_dev->dev_data = adummy_dev; |
| 166 | |
| 167 | if (sysfs_create_group(&atm_dev->class_dev.kobj, &adummy_group_attrs)) |
| 168 | dev_err(&atm_dev->class_dev, "Could not register attrs for adummy\n"); |
| 169 | |
| 170 | if (adummy_start(atm_dev)) { |
| 171 | printk(KERN_ERR DEV_LABEL ": adummy_start() failed\n"); |
| 172 | err = -ENODEV; |
| 173 | goto out_unregister; |
| 174 | } |
| 175 | |
| 176 | list_add(&adummy_dev->entry, &adummy_devs); |
| 177 | out: |
| 178 | return err; |
| 179 | |
| 180 | out_unregister: |
| 181 | atm_dev_deregister(atm_dev); |
| 182 | out_kfree: |
| 183 | kfree(adummy_dev); |
| 184 | goto out; |
| 185 | } |
| 186 | |
| 187 | static void __exit adummy_cleanup(void) |
| 188 | { |
| 189 | struct adummy_dev *adummy_dev, *next; |
| 190 | |
| 191 | list_for_each_entry_safe(adummy_dev, next, &adummy_devs, entry) { |
| 192 | atm_dev_deregister(adummy_dev->atm_dev); |
| 193 | kfree(adummy_dev); |
| 194 | } |
| 195 | } |
| 196 | |
| 197 | module_init(adummy_init); |
| 198 | module_exit(adummy_cleanup); |
| 199 | |
| 200 | MODULE_AUTHOR("chas williams <chas@cmf.nrl.navy.mil>"); |
| 201 | MODULE_DESCRIPTION("dummy ATM driver"); |
| 202 | MODULE_LICENSE("GPL"); |
| 203 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.11
jz-3.12
jz-3.13
jz-3.15
jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9
