r6040: check for absent PHY
[linux-2.6] / drivers / net / gianfar_sysfs.c
1 /*
2  * drivers/net/gianfar_sysfs.c
3  *
4  * Gianfar Ethernet Driver
5  * This driver is designed for the non-CPM ethernet controllers
6  * on the 85xx and 83xx family of integrated processors
7  * Based on 8260_io/fcc_enet.c
8  *
9  * Author: Andy Fleming
10  * Maintainer: Kumar Gala (galak@kernel.crashing.org)
11  *
12  * Copyright (c) 2002-2005 Freescale Semiconductor, Inc.
13  *
14  * This program is free software; you can redistribute  it and/or modify it
15  * under  the terms of  the GNU General  Public License as published by the
16  * Free Software Foundation;  either version 2 of the  License, or (at your
17  * option) any later version.
18  *
19  * Sysfs file creation and management
20  */
21
22 #include <linux/kernel.h>
23 #include <linux/string.h>
24 #include <linux/errno.h>
25 #include <linux/unistd.h>
26 #include <linux/slab.h>
27 #include <linux/init.h>
28 #include <linux/delay.h>
29 #include <linux/etherdevice.h>
30 #include <linux/spinlock.h>
31 #include <linux/mm.h>
32 #include <linux/device.h>
33
34 #include <asm/uaccess.h>
35 #include <linux/module.h>
36
37 #include "gianfar.h"
38
39 static ssize_t gfar_show_bd_stash(struct device *dev,
40                                   struct device_attribute *attr, char *buf)
41 {
42         struct gfar_private *priv = netdev_priv(to_net_dev(dev));
43
44         return sprintf(buf, "%s\n", priv->bd_stash_en ? "on" : "off");
45 }
46
47 static ssize_t gfar_set_bd_stash(struct device *dev,
48                                  struct device_attribute *attr,
49                                  const char *buf, size_t count)
50 {
51         struct gfar_private *priv = netdev_priv(to_net_dev(dev));
52         int new_setting = 0;
53         u32 temp;
54         unsigned long flags;
55
56         if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_BD_STASHING))
57                 return count;
58
59         /* Find out the new setting */
60         if (!strncmp("on", buf, count - 1) || !strncmp("1", buf, count - 1))
61                 new_setting = 1;
62         else if (!strncmp("off", buf, count - 1)
63                  || !strncmp("0", buf, count - 1))
64                 new_setting = 0;
65         else
66                 return count;
67
68         spin_lock_irqsave(&priv->rxlock, flags);
69
70         /* Set the new stashing value */
71         priv->bd_stash_en = new_setting;
72
73         temp = gfar_read(&priv->regs->attr);
74
75         if (new_setting)
76                 temp |= ATTR_BDSTASH;
77         else
78                 temp &= ~(ATTR_BDSTASH);
79
80         gfar_write(&priv->regs->attr, temp);
81
82         spin_unlock_irqrestore(&priv->rxlock, flags);
83
84         return count;
85 }
86
87 static DEVICE_ATTR(bd_stash, 0644, gfar_show_bd_stash, gfar_set_bd_stash);
88
89 static ssize_t gfar_show_rx_stash_size(struct device *dev,
90                                        struct device_attribute *attr, char *buf)
91 {
92         struct gfar_private *priv = netdev_priv(to_net_dev(dev));
93
94         return sprintf(buf, "%d\n", priv->rx_stash_size);
95 }
96
97 static ssize_t gfar_set_rx_stash_size(struct device *dev,
98                                       struct device_attribute *attr,
99                                       const char *buf, size_t count)
100 {
101         struct gfar_private *priv = netdev_priv(to_net_dev(dev));
102         unsigned int length = simple_strtoul(buf, NULL, 0);
103         u32 temp;
104         unsigned long flags;
105
106         if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_BUF_STASHING))
107                 return count;
108
109         spin_lock_irqsave(&priv->rxlock, flags);
110         if (length > priv->rx_buffer_size)
111                 goto out;
112
113         if (length == priv->rx_stash_size)
114                 goto out;
115
116         priv->rx_stash_size = length;
117
118         temp = gfar_read(&priv->regs->attreli);
119         temp &= ~ATTRELI_EL_MASK;
120         temp |= ATTRELI_EL(length);
121         gfar_write(&priv->regs->attreli, temp);
122
123         /* Turn stashing on/off as appropriate */
124         temp = gfar_read(&priv->regs->attr);
125
126         if (length)
127                 temp |= ATTR_BUFSTASH;
128         else
129                 temp &= ~(ATTR_BUFSTASH);
130
131         gfar_write(&priv->regs->attr, temp);
132
133 out:
134         spin_unlock_irqrestore(&priv->rxlock, flags);
135
136         return count;
137 }
138
139 static DEVICE_ATTR(rx_stash_size, 0644, gfar_show_rx_stash_size,
140                    gfar_set_rx_stash_size);
141
142 /* Stashing will only be enabled when rx_stash_size != 0 */
143 static ssize_t gfar_show_rx_stash_index(struct device *dev,
144                                         struct device_attribute *attr,
145                                         char *buf)
146 {
147         struct gfar_private *priv = netdev_priv(to_net_dev(dev));
148
149         return sprintf(buf, "%d\n", priv->rx_stash_index);
150 }
151
152 static ssize_t gfar_set_rx_stash_index(struct device *dev,
153                                        struct device_attribute *attr,
154                                        const char *buf, size_t count)
155 {
156         struct gfar_private *priv = netdev_priv(to_net_dev(dev));
157         unsigned short index = simple_strtoul(buf, NULL, 0);
158         u32 temp;
159         unsigned long flags;
160
161         if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_BUF_STASHING))
162                 return count;
163
164         spin_lock_irqsave(&priv->rxlock, flags);
165         if (index > priv->rx_stash_size)
166                 goto out;
167
168         if (index == priv->rx_stash_index)
169                 goto out;
170
171         priv->rx_stash_index = index;
172
173         temp = gfar_read(&priv->regs->attreli);
174         temp &= ~ATTRELI_EI_MASK;
175         temp |= ATTRELI_EI(index);
176         gfar_write(&priv->regs->attreli, flags);
177
178 out:
179         spin_unlock_irqrestore(&priv->rxlock, flags);
180
181         return count;
182 }
183
184 static DEVICE_ATTR(rx_stash_index, 0644, gfar_show_rx_stash_index,
185                    gfar_set_rx_stash_index);
186
187 static ssize_t gfar_show_fifo_threshold(struct device *dev,
188                                         struct device_attribute *attr,
189                                         char *buf)
190 {
191         struct gfar_private *priv = netdev_priv(to_net_dev(dev));
192
193         return sprintf(buf, "%d\n", priv->fifo_threshold);
194 }
195
196 static ssize_t gfar_set_fifo_threshold(struct device *dev,
197                                        struct device_attribute *attr,
198                                        const char *buf, size_t count)
199 {
200         struct gfar_private *priv = netdev_priv(to_net_dev(dev));
201         unsigned int length = simple_strtoul(buf, NULL, 0);
202         u32 temp;
203         unsigned long flags;
204
205         if (length > GFAR_MAX_FIFO_THRESHOLD)
206                 return count;
207
208         spin_lock_irqsave(&priv->txlock, flags);
209
210         priv->fifo_threshold = length;
211
212         temp = gfar_read(&priv->regs->fifo_tx_thr);
213         temp &= ~FIFO_TX_THR_MASK;
214         temp |= length;
215         gfar_write(&priv->regs->fifo_tx_thr, temp);
216
217         spin_unlock_irqrestore(&priv->txlock, flags);
218
219         return count;
220 }
221
222 static DEVICE_ATTR(fifo_threshold, 0644, gfar_show_fifo_threshold,
223                    gfar_set_fifo_threshold);
224
225 static ssize_t gfar_show_fifo_starve(struct device *dev,
226                                      struct device_attribute *attr, char *buf)
227 {
228         struct gfar_private *priv = netdev_priv(to_net_dev(dev));
229
230         return sprintf(buf, "%d\n", priv->fifo_starve);
231 }
232
233 static ssize_t gfar_set_fifo_starve(struct device *dev,
234                                     struct device_attribute *attr,
235                                     const char *buf, size_t count)
236 {
237         struct gfar_private *priv = netdev_priv(to_net_dev(dev));
238         unsigned int num = simple_strtoul(buf, NULL, 0);
239         u32 temp;
240         unsigned long flags;
241
242         if (num > GFAR_MAX_FIFO_STARVE)
243                 return count;
244
245         spin_lock_irqsave(&priv->txlock, flags);
246
247         priv->fifo_starve = num;
248
249         temp = gfar_read(&priv->regs->fifo_tx_starve);
250         temp &= ~FIFO_TX_STARVE_MASK;
251         temp |= num;
252         gfar_write(&priv->regs->fifo_tx_starve, temp);
253
254         spin_unlock_irqrestore(&priv->txlock, flags);
255
256         return count;
257 }
258
259 static DEVICE_ATTR(fifo_starve, 0644, gfar_show_fifo_starve,
260                    gfar_set_fifo_starve);
261
262 static ssize_t gfar_show_fifo_starve_off(struct device *dev,
263                                          struct device_attribute *attr,
264                                          char *buf)
265 {
266         struct gfar_private *priv = netdev_priv(to_net_dev(dev));
267
268         return sprintf(buf, "%d\n", priv->fifo_starve_off);
269 }
270
271 static ssize_t gfar_set_fifo_starve_off(struct device *dev,
272                                         struct device_attribute *attr,
273                                         const char *buf, size_t count)
274 {
275         struct gfar_private *priv = netdev_priv(to_net_dev(dev));
276         unsigned int num = simple_strtoul(buf, NULL, 0);
277         u32 temp;
278         unsigned long flags;
279
280         if (num > GFAR_MAX_FIFO_STARVE_OFF)
281                 return count;
282
283         spin_lock_irqsave(&priv->txlock, flags);
284
285         priv->fifo_starve_off = num;
286
287         temp = gfar_read(&priv->regs->fifo_tx_starve_shutoff);
288         temp &= ~FIFO_TX_STARVE_OFF_MASK;
289         temp |= num;
290         gfar_write(&priv->regs->fifo_tx_starve_shutoff, temp);
291
292         spin_unlock_irqrestore(&priv->txlock, flags);
293
294         return count;
295 }
296
297 static DEVICE_ATTR(fifo_starve_off, 0644, gfar_show_fifo_starve_off,
298                    gfar_set_fifo_starve_off);
299
300 void gfar_init_sysfs(struct net_device *dev)
301 {
302         struct gfar_private *priv = netdev_priv(dev);
303         int rc;
304
305         /* Initialize the default values */
306         priv->fifo_threshold = DEFAULT_FIFO_TX_THR;
307         priv->fifo_starve = DEFAULT_FIFO_TX_STARVE;
308         priv->fifo_starve_off = DEFAULT_FIFO_TX_STARVE_OFF;
309
310         /* Create our sysfs files */
311         rc = device_create_file(&dev->dev, &dev_attr_bd_stash);
312         rc |= device_create_file(&dev->dev, &dev_attr_rx_stash_size);
313         rc |= device_create_file(&dev->dev, &dev_attr_rx_stash_index);
314         rc |= device_create_file(&dev->dev, &dev_attr_fifo_threshold);
315         rc |= device_create_file(&dev->dev, &dev_attr_fifo_starve);
316         rc |= device_create_file(&dev->dev, &dev_attr_fifo_starve_off);
317         if (rc)
318                 dev_err(&dev->dev, "Error creating gianfar sysfs files.\n");
319 }