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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * MUSB OTG driver debugfs support
4 *
5 * Copyright 2010 Nokia Corporation
6 * Contact: Felipe Balbi <felipe.balbi@nokia.com>
7 */
8
9#include <linux/module.h>
10#include <linux/kernel.h>
11#include <linux/init.h>
12#include <linux/debugfs.h>
13#include <linux/seq_file.h>
14
15#include <linux/uaccess.h>
16
17#include "musb_core.h"
18#include "musb_debug.h"
19
20struct musb_register_map {
21 char *name;
22 unsigned offset;
23 unsigned size;
24};
25
26static const struct musb_register_map musb_regmap[] = {
27 { "FAddr", MUSB_FADDR, 8 },
28 { "Power", MUSB_POWER, 8 },
29 { "Frame", MUSB_FRAME, 16 },
30 { "Index", MUSB_INDEX, 8 },
31 { "Testmode", MUSB_TESTMODE, 8 },
32 { "TxMaxPp", MUSB_TXMAXP, 16 },
33 { "TxCSRp", MUSB_TXCSR, 16 },
34 { "RxMaxPp", MUSB_RXMAXP, 16 },
35 { "RxCSR", MUSB_RXCSR, 16 },
36 { "RxCount", MUSB_RXCOUNT, 16 },
37 { "IntrRxE", MUSB_INTRRXE, 16 },
38 { "IntrTxE", MUSB_INTRTXE, 16 },
39 { "IntrUsbE", MUSB_INTRUSBE, 8 },
40 { "DevCtl", MUSB_DEVCTL, 8 },
41 { "VControl", 0x68, 32 },
42 { "HWVers", MUSB_HWVERS, 16 },
43 { "LinkInfo", MUSB_LINKINFO, 8 },
44 { "VPLen", MUSB_VPLEN, 8 },
45 { "HS_EOF1", MUSB_HS_EOF1, 8 },
46 { "FS_EOF1", MUSB_FS_EOF1, 8 },
47 { "LS_EOF1", MUSB_LS_EOF1, 8 },
48 { "SOFT_RST", 0x7F, 8 },
49 { "DMA_CNTLch0", 0x204, 16 },
50 { "DMA_ADDRch0", 0x208, 32 },
51 { "DMA_COUNTch0", 0x20C, 32 },
52 { "DMA_CNTLch1", 0x214, 16 },
53 { "DMA_ADDRch1", 0x218, 32 },
54 { "DMA_COUNTch1", 0x21C, 32 },
55 { "DMA_CNTLch2", 0x224, 16 },
56 { "DMA_ADDRch2", 0x228, 32 },
57 { "DMA_COUNTch2", 0x22C, 32 },
58 { "DMA_CNTLch3", 0x234, 16 },
59 { "DMA_ADDRch3", 0x238, 32 },
60 { "DMA_COUNTch3", 0x23C, 32 },
61 { "DMA_CNTLch4", 0x244, 16 },
62 { "DMA_ADDRch4", 0x248, 32 },
63 { "DMA_COUNTch4", 0x24C, 32 },
64 { "DMA_CNTLch5", 0x254, 16 },
65 { "DMA_ADDRch5", 0x258, 32 },
66 { "DMA_COUNTch5", 0x25C, 32 },
67 { "DMA_CNTLch6", 0x264, 16 },
68 { "DMA_ADDRch6", 0x268, 32 },
69 { "DMA_COUNTch6", 0x26C, 32 },
70 { "DMA_CNTLch7", 0x274, 16 },
71 { "DMA_ADDRch7", 0x278, 32 },
72 { "DMA_COUNTch7", 0x27C, 32 },
73 { "ConfigData", MUSB_CONFIGDATA,8 },
74 { "BabbleCtl", MUSB_BABBLE_CTL,8 },
75 { "TxFIFOsz", MUSB_TXFIFOSZ, 8 },
76 { "RxFIFOsz", MUSB_RXFIFOSZ, 8 },
77 { "TxFIFOadd", MUSB_TXFIFOADD, 16 },
78 { "RxFIFOadd", MUSB_RXFIFOADD, 16 },
79 { "EPInfo", MUSB_EPINFO, 8 },
80 { "RAMInfo", MUSB_RAMINFO, 8 },
81 { } /* Terminating Entry */
82};
83
84static int musb_regdump_show(struct seq_file *s, void *unused)
85{
86 struct musb *musb = s->private;
87 unsigned i;
88
89 seq_printf(s, "MUSB (M)HDRC Register Dump\n");
90 pm_runtime_get_sync(musb->controller);
91
92 for (i = 0; i < ARRAY_SIZE(musb_regmap); i++) {
93 switch (musb_regmap[i].size) {
94 case 8:
95 seq_printf(s, "%-12s: %02x\n", musb_regmap[i].name,
96 musb_readb(musb->mregs, musb_regmap[i].offset));
97 break;
98 case 16:
99 seq_printf(s, "%-12s: %04x\n", musb_regmap[i].name,
100 musb_readw(musb->mregs, musb_regmap[i].offset));
101 break;
102 case 32:
103 seq_printf(s, "%-12s: %08x\n", musb_regmap[i].name,
104 musb_readl(musb->mregs, musb_regmap[i].offset));
105 break;
106 }
107 }
108
109 pm_runtime_mark_last_busy(musb->controller);
110 pm_runtime_put_autosuspend(musb->controller);
111 return 0;
112}
113DEFINE_SHOW_ATTRIBUTE(musb_regdump);
114
115static int musb_test_mode_show(struct seq_file *s, void *unused)
116{
117 struct musb *musb = s->private;
118 unsigned test;
119
120 pm_runtime_get_sync(musb->controller);
121 test = musb_readb(musb->mregs, MUSB_TESTMODE);
122 pm_runtime_mark_last_busy(musb->controller);
123 pm_runtime_put_autosuspend(musb->controller);
124
125 if (test == (MUSB_TEST_FORCE_HOST | MUSB_TEST_FORCE_FS))
126 seq_printf(s, "force host full-speed\n");
127
128 else if (test == (MUSB_TEST_FORCE_HOST | MUSB_TEST_FORCE_HS))
129 seq_printf(s, "force host high-speed\n");
130
131 else if (test == MUSB_TEST_FORCE_HOST)
132 seq_printf(s, "force host\n");
133
134 else if (test == MUSB_TEST_FIFO_ACCESS)
135 seq_printf(s, "fifo access\n");
136
137 else if (test == MUSB_TEST_FORCE_FS)
138 seq_printf(s, "force full-speed\n");
139
140 else if (test == MUSB_TEST_FORCE_HS)
141 seq_printf(s, "force high-speed\n");
142
143 else if (test == MUSB_TEST_PACKET)
144 seq_printf(s, "test packet\n");
145
146 else if (test == MUSB_TEST_K)
147 seq_printf(s, "test K\n");
148
149 else if (test == MUSB_TEST_J)
150 seq_printf(s, "test J\n");
151
152 else if (test == MUSB_TEST_SE0_NAK)
153 seq_printf(s, "test SE0 NAK\n");
154
155 return 0;
156}
157
158static int musb_test_mode_open(struct inode *inode, struct file *file)
159{
160 return single_open(file, musb_test_mode_show, inode->i_private);
161}
162
163static ssize_t musb_test_mode_write(struct file *file,
164 const char __user *ubuf, size_t count, loff_t *ppos)
165{
166 struct seq_file *s = file->private_data;
167 struct musb *musb = s->private;
168 u8 test;
169 char buf[24];
170
171 memset(buf, 0x00, sizeof(buf));
172
173 if (copy_from_user(buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
174 return -EFAULT;
175
176 pm_runtime_get_sync(musb->controller);
177 test = musb_readb(musb->mregs, MUSB_TESTMODE);
178 if (test) {
179 dev_err(musb->controller, "Error: test mode is already set. "
180 "Please do USB Bus Reset to start a new test.\n");
181 goto ret;
182 }
183
184 if (strstarts(buf, "force host full-speed"))
185 test = MUSB_TEST_FORCE_HOST | MUSB_TEST_FORCE_FS;
186
187 else if (strstarts(buf, "force host high-speed"))
188 test = MUSB_TEST_FORCE_HOST | MUSB_TEST_FORCE_HS;
189
190 else if (strstarts(buf, "force host"))
191 test = MUSB_TEST_FORCE_HOST;
192
193 else if (strstarts(buf, "fifo access"))
194 test = MUSB_TEST_FIFO_ACCESS;
195
196 else if (strstarts(buf, "force full-speed"))
197 test = MUSB_TEST_FORCE_FS;
198
199 else if (strstarts(buf, "force high-speed"))
200 test = MUSB_TEST_FORCE_HS;
201
202 else if (strstarts(buf, "test packet")) {
203 test = MUSB_TEST_PACKET;
204 musb_load_testpacket(musb);
205 }
206
207 else if (strstarts(buf, "test K"))
208 test = MUSB_TEST_K;
209
210 else if (strstarts(buf, "test J"))
211 test = MUSB_TEST_J;
212
213 else if (strstarts(buf, "test SE0 NAK"))
214 test = MUSB_TEST_SE0_NAK;
215
216 musb_writeb(musb->mregs, MUSB_TESTMODE, test);
217
218ret:
219 pm_runtime_mark_last_busy(musb->controller);
220 pm_runtime_put_autosuspend(musb->controller);
221 return count;
222}
223
224static const struct file_operations musb_test_mode_fops = {
225 .open = musb_test_mode_open,
226 .write = musb_test_mode_write,
227 .read = seq_read,
228 .llseek = seq_lseek,
229 .release = single_release,
230};
231
232static int musb_softconnect_show(struct seq_file *s, void *unused)
233{
234 struct musb *musb = s->private;
235 u8 reg;
236 int connect;
237
238 switch (musb_get_state(musb)) {
239 case OTG_STATE_A_HOST:
240 case OTG_STATE_A_WAIT_BCON:
241 pm_runtime_get_sync(musb->controller);
242
243 reg = musb_readb(musb->mregs, MUSB_DEVCTL);
244 connect = reg & MUSB_DEVCTL_SESSION ? 1 : 0;
245
246 pm_runtime_mark_last_busy(musb->controller);
247 pm_runtime_put_autosuspend(musb->controller);
248 break;
249 default:
250 connect = -1;
251 }
252
253 seq_printf(s, "%d\n", connect);
254
255 return 0;
256}
257
258static int musb_softconnect_open(struct inode *inode, struct file *file)
259{
260 return single_open(file, musb_softconnect_show, inode->i_private);
261}
262
263static ssize_t musb_softconnect_write(struct file *file,
264 const char __user *ubuf, size_t count, loff_t *ppos)
265{
266 struct seq_file *s = file->private_data;
267 struct musb *musb = s->private;
268 char buf[2];
269 u8 reg;
270
271 memset(buf, 0x00, sizeof(buf));
272
273 if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
274 return -EFAULT;
275
276 pm_runtime_get_sync(musb->controller);
277 if (!strncmp(buf, "0", 1)) {
278 switch (musb_get_state(musb)) {
279 case OTG_STATE_A_HOST:
280 musb_root_disconnect(musb);
281 reg = musb_readb(musb->mregs, MUSB_DEVCTL);
282 reg &= ~MUSB_DEVCTL_SESSION;
283 musb_writeb(musb->mregs, MUSB_DEVCTL, reg);
284 break;
285 default:
286 break;
287 }
288 } else if (!strncmp(buf, "1", 1)) {
289 switch (musb_get_state(musb)) {
290 case OTG_STATE_A_WAIT_BCON:
291 /*
292 * musb_save_context() called in musb_runtime_suspend()
293 * might cache devctl with SESSION bit cleared during
294 * soft-disconnect, so specifically set SESSION bit
295 * here to preserve it for musb_runtime_resume().
296 */
297 musb->context.devctl |= MUSB_DEVCTL_SESSION;
298 reg = musb_readb(musb->mregs, MUSB_DEVCTL);
299 reg |= MUSB_DEVCTL_SESSION;
300 musb_writeb(musb->mregs, MUSB_DEVCTL, reg);
301 break;
302 default:
303 break;
304 }
305 }
306
307 pm_runtime_mark_last_busy(musb->controller);
308 pm_runtime_put_autosuspend(musb->controller);
309 return count;
310}
311
312/*
313 * In host mode, connect/disconnect the bus without physically
314 * remove the devices.
315 */
316static const struct file_operations musb_softconnect_fops = {
317 .open = musb_softconnect_open,
318 .write = musb_softconnect_write,
319 .read = seq_read,
320 .llseek = seq_lseek,
321 .release = single_release,
322};
323
324void musb_init_debugfs(struct musb *musb)
325{
326 struct dentry *root;
327
328 root = debugfs_create_dir(dev_name(musb->controller), usb_debug_root);
329 musb->debugfs_root = root;
330
331 debugfs_create_file("regdump", S_IRUGO, root, musb, &musb_regdump_fops);
332 debugfs_create_file("testmode", S_IRUGO | S_IWUSR, root, musb,
333 &musb_test_mode_fops);
334 debugfs_create_file("softconnect", S_IRUGO | S_IWUSR, root, musb,
335 &musb_softconnect_fops);
336}
337
338void /* __init_or_exit */ musb_exit_debugfs(struct musb *musb)
339{
340 debugfs_remove_recursive(musb->debugfs_root);
341}
1/*
2 * MUSB OTG driver debugfs support
3 *
4 * Copyright 2010 Nokia Corporation
5 * Contact: Felipe Balbi <felipe.balbi@nokia.com>
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * version 2 as published by the Free Software Foundation.
10 *
11 * This program is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
19 * 02110-1301 USA
20 *
21 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
22 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
23 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
24 * NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
27 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
28 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 *
32 */
33
34#include <linux/module.h>
35#include <linux/kernel.h>
36#include <linux/sched.h>
37#include <linux/init.h>
38#include <linux/list.h>
39#include <linux/platform_device.h>
40#include <linux/io.h>
41#include <linux/debugfs.h>
42#include <linux/seq_file.h>
43
44#ifdef CONFIG_ARM
45#include <mach/hardware.h>
46#include <mach/memory.h>
47#include <asm/mach-types.h>
48#endif
49
50#include <asm/uaccess.h>
51
52#include "musb_core.h"
53#include "musb_debug.h"
54
55#ifdef CONFIG_ARCH_DAVINCI
56#include "davinci.h"
57#endif
58
59struct musb_register_map {
60 char *name;
61 unsigned offset;
62 unsigned size;
63};
64
65static const struct musb_register_map musb_regmap[] = {
66 { "FAddr", 0x00, 8 },
67 { "Power", 0x01, 8 },
68 { "Frame", 0x0c, 16 },
69 { "Index", 0x0e, 8 },
70 { "Testmode", 0x0f, 8 },
71 { "TxMaxPp", 0x10, 16 },
72 { "TxCSRp", 0x12, 16 },
73 { "RxMaxPp", 0x14, 16 },
74 { "RxCSR", 0x16, 16 },
75 { "RxCount", 0x18, 16 },
76 { "ConfigData", 0x1f, 8 },
77 { "DevCtl", 0x60, 8 },
78 { "MISC", 0x61, 8 },
79 { "TxFIFOsz", 0x62, 8 },
80 { "RxFIFOsz", 0x63, 8 },
81 { "TxFIFOadd", 0x64, 16 },
82 { "RxFIFOadd", 0x66, 16 },
83 { "VControl", 0x68, 32 },
84 { "HWVers", 0x6C, 16 },
85 { "EPInfo", 0x78, 8 },
86 { "RAMInfo", 0x79, 8 },
87 { "LinkInfo", 0x7A, 8 },
88 { "VPLen", 0x7B, 8 },
89 { "HS_EOF1", 0x7C, 8 },
90 { "FS_EOF1", 0x7D, 8 },
91 { "LS_EOF1", 0x7E, 8 },
92 { "SOFT_RST", 0x7F, 8 },
93 { "DMA_CNTLch0", 0x204, 16 },
94 { "DMA_ADDRch0", 0x208, 32 },
95 { "DMA_COUNTch0", 0x20C, 32 },
96 { "DMA_CNTLch1", 0x214, 16 },
97 { "DMA_ADDRch1", 0x218, 32 },
98 { "DMA_COUNTch1", 0x21C, 32 },
99 { "DMA_CNTLch2", 0x224, 16 },
100 { "DMA_ADDRch2", 0x228, 32 },
101 { "DMA_COUNTch2", 0x22C, 32 },
102 { "DMA_CNTLch3", 0x234, 16 },
103 { "DMA_ADDRch3", 0x238, 32 },
104 { "DMA_COUNTch3", 0x23C, 32 },
105 { "DMA_CNTLch4", 0x244, 16 },
106 { "DMA_ADDRch4", 0x248, 32 },
107 { "DMA_COUNTch4", 0x24C, 32 },
108 { "DMA_CNTLch5", 0x254, 16 },
109 { "DMA_ADDRch5", 0x258, 32 },
110 { "DMA_COUNTch5", 0x25C, 32 },
111 { "DMA_CNTLch6", 0x264, 16 },
112 { "DMA_ADDRch6", 0x268, 32 },
113 { "DMA_COUNTch6", 0x26C, 32 },
114 { "DMA_CNTLch7", 0x274, 16 },
115 { "DMA_ADDRch7", 0x278, 32 },
116 { "DMA_COUNTch7", 0x27C, 32 },
117 { } /* Terminating Entry */
118};
119
120static struct dentry *musb_debugfs_root;
121
122static int musb_regdump_show(struct seq_file *s, void *unused)
123{
124 struct musb *musb = s->private;
125 unsigned i;
126
127 seq_printf(s, "MUSB (M)HDRC Register Dump\n");
128
129 for (i = 0; i < ARRAY_SIZE(musb_regmap); i++) {
130 switch (musb_regmap[i].size) {
131 case 8:
132 seq_printf(s, "%-12s: %02x\n", musb_regmap[i].name,
133 musb_readb(musb->mregs, musb_regmap[i].offset));
134 break;
135 case 16:
136 seq_printf(s, "%-12s: %04x\n", musb_regmap[i].name,
137 musb_readw(musb->mregs, musb_regmap[i].offset));
138 break;
139 case 32:
140 seq_printf(s, "%-12s: %08x\n", musb_regmap[i].name,
141 musb_readl(musb->mregs, musb_regmap[i].offset));
142 break;
143 }
144 }
145
146 return 0;
147}
148
149static int musb_regdump_open(struct inode *inode, struct file *file)
150{
151 return single_open(file, musb_regdump_show, inode->i_private);
152}
153
154static int musb_test_mode_show(struct seq_file *s, void *unused)
155{
156 struct musb *musb = s->private;
157 unsigned test;
158
159 test = musb_readb(musb->mregs, MUSB_TESTMODE);
160
161 if (test & MUSB_TEST_FORCE_HOST)
162 seq_printf(s, "force host\n");
163
164 if (test & MUSB_TEST_FIFO_ACCESS)
165 seq_printf(s, "fifo access\n");
166
167 if (test & MUSB_TEST_FORCE_FS)
168 seq_printf(s, "force full-speed\n");
169
170 if (test & MUSB_TEST_FORCE_HS)
171 seq_printf(s, "force high-speed\n");
172
173 if (test & MUSB_TEST_PACKET)
174 seq_printf(s, "test packet\n");
175
176 if (test & MUSB_TEST_K)
177 seq_printf(s, "test K\n");
178
179 if (test & MUSB_TEST_J)
180 seq_printf(s, "test J\n");
181
182 if (test & MUSB_TEST_SE0_NAK)
183 seq_printf(s, "test SE0 NAK\n");
184
185 return 0;
186}
187
188static const struct file_operations musb_regdump_fops = {
189 .open = musb_regdump_open,
190 .read = seq_read,
191 .llseek = seq_lseek,
192 .release = single_release,
193};
194
195static int musb_test_mode_open(struct inode *inode, struct file *file)
196{
197 return single_open(file, musb_test_mode_show, inode->i_private);
198}
199
200static ssize_t musb_test_mode_write(struct file *file,
201 const char __user *ubuf, size_t count, loff_t *ppos)
202{
203 struct seq_file *s = file->private_data;
204 struct musb *musb = s->private;
205 u8 test = 0;
206 char buf[18];
207
208 memset(buf, 0x00, sizeof(buf));
209
210 if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
211 return -EFAULT;
212
213 if (!strncmp(buf, "force host", 9))
214 test = MUSB_TEST_FORCE_HOST;
215
216 if (!strncmp(buf, "fifo access", 11))
217 test = MUSB_TEST_FIFO_ACCESS;
218
219 if (!strncmp(buf, "force full-speed", 15))
220 test = MUSB_TEST_FORCE_FS;
221
222 if (!strncmp(buf, "force high-speed", 15))
223 test = MUSB_TEST_FORCE_HS;
224
225 if (!strncmp(buf, "test packet", 10)) {
226 test = MUSB_TEST_PACKET;
227 musb_load_testpacket(musb);
228 }
229
230 if (!strncmp(buf, "test K", 6))
231 test = MUSB_TEST_K;
232
233 if (!strncmp(buf, "test J", 6))
234 test = MUSB_TEST_J;
235
236 if (!strncmp(buf, "test SE0 NAK", 12))
237 test = MUSB_TEST_SE0_NAK;
238
239 musb_writeb(musb->mregs, MUSB_TESTMODE, test);
240
241 return count;
242}
243
244static const struct file_operations musb_test_mode_fops = {
245 .open = musb_test_mode_open,
246 .write = musb_test_mode_write,
247 .read = seq_read,
248 .llseek = seq_lseek,
249 .release = single_release,
250};
251
252int __init musb_init_debugfs(struct musb *musb)
253{
254 struct dentry *root;
255 struct dentry *file;
256 int ret;
257
258 root = debugfs_create_dir("musb", NULL);
259 if (IS_ERR(root)) {
260 ret = PTR_ERR(root);
261 goto err0;
262 }
263
264 file = debugfs_create_file("regdump", S_IRUGO, root, musb,
265 &musb_regdump_fops);
266 if (IS_ERR(file)) {
267 ret = PTR_ERR(file);
268 goto err1;
269 }
270
271 file = debugfs_create_file("testmode", S_IRUGO | S_IWUSR,
272 root, musb, &musb_test_mode_fops);
273 if (IS_ERR(file)) {
274 ret = PTR_ERR(file);
275 goto err1;
276 }
277
278 musb_debugfs_root = root;
279
280 return 0;
281
282err1:
283 debugfs_remove_recursive(root);
284
285err0:
286 return ret;
287}
288
289void /* __init_or_exit */ musb_exit_debugfs(struct musb *musb)
290{
291 debugfs_remove_recursive(musb_debugfs_root);
292}