1 /*
2  *  Copyright (c) 1998-2002 by Paul Davis <pbd@op.net>
3  *
4  *  This program is free software; you can redistribute it and/or modify
5  *  it under the terms of the GNU General Public License as published by
6  *  the Free Software Foundation; either version 2 of the License, or
7  *  (at your option) any later version.
8  *
9  *  This program is distributed in the hope that it will be useful,
10  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
11  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12  *  GNU General Public License for more details.
13  *
14  *  You should have received a copy of the GNU General Public License
15  *  along with this program; if not, write to the Free Software
16  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
17  */
18 
19 #include <linux/io.h>
20 #include <linux/init.h>
21 #include <linux/time.h>
22 #include <linux/wait.h>
23 #include <linux/slab.h>
24 #include <linux/module.h>
25 #include <linux/firmware.h>
26 #include <sound/core.h>
27 #include <sound/snd_wavefront.h>
28 #include <sound/initval.h>
29 
30 /* Control bits for the Load Control Register
31  */
32 
33 #define FX_LSB_TRANSFER 0x01    /* transfer after DSP LSB byte written */
34 #define FX_MSB_TRANSFER 0x02    /* transfer after DSP MSB byte written */
35 #define FX_AUTO_INCR    0x04    /* auto-increment DSP address after transfer */
36 
37 #define WAIT_IDLE	0xff
38 
39 static int
40 wavefront_fx_idle (snd_wavefront_t *dev)
41 
42 {
43 	int i;
44 	unsigned int x = 0x80;
45 
46 	for (i = 0; i < 1000; i++) {
47 		x = inb (dev->fx_status);
48 		if ((x & 0x80) == 0) {
49 			break;
50 		}
51 	}
52 
53 	if (x & 0x80) {
54 		snd_printk ("FX device never idle.\n");
55 		return 0;
56 	}
57 
58 	return (1);
59 }
60 
61 static void
62 wavefront_fx_mute (snd_wavefront_t *dev, int onoff)
63 
64 {
65 	if (!wavefront_fx_idle(dev)) {
66 		return;
67 	}
68 
69 	outb (onoff ? 0x02 : 0x00, dev->fx_op);
70 }
71 
72 static int
73 wavefront_fx_memset (snd_wavefront_t *dev,
74 		     int page,
75 		     int addr,
76 		     int cnt,
77 		     unsigned short *data)
78 {
79 	if (page < 0 || page > 7) {
80 		snd_printk ("FX memset: "
81 			"page must be >= 0 and <= 7\n");
82 		return -EINVAL;
83 	}
84 
85 	if (addr < 0 || addr > 0x7f) {
86 		snd_printk ("FX memset: "
87 			"addr must be >= 0 and <= 7f\n");
88 		return -EINVAL;
89 	}
90 
91 	if (cnt == 1) {
92 
93 		outb (FX_LSB_TRANSFER, dev->fx_lcr);
94 		outb (page, dev->fx_dsp_page);
95 		outb (addr, dev->fx_dsp_addr);
96 		outb ((data[0] >> 8), dev->fx_dsp_msb);
97 		outb ((data[0] & 0xff), dev->fx_dsp_lsb);
98 
99 		snd_printk ("FX: addr %d:%x set to 0x%x\n",
100 			page, addr, data[0]);
101 
102 	} else {
103 		int i;
104 
105 		outb (FX_AUTO_INCR|FX_LSB_TRANSFER, dev->fx_lcr);
106 		outb (page, dev->fx_dsp_page);
107 		outb (addr, dev->fx_dsp_addr);
108 
109 		for (i = 0; i < cnt; i++) {
110 			outb ((data[i] >> 8), dev->fx_dsp_msb);
111 			outb ((data[i] & 0xff), dev->fx_dsp_lsb);
112 			if (!wavefront_fx_idle (dev)) {
113 				break;
114 			}
115 		}
116 
117 		if (i != cnt) {
118 			snd_printk ("FX memset "
119 				    "(0x%x, 0x%x, 0x%lx, %d) incomplete\n",
120 				    page, addr, (unsigned long) data, cnt);
121 			return -EIO;
122 		}
123 	}
124 
125 	return 0;
126 }
127 
128 int
129 snd_wavefront_fx_detect (snd_wavefront_t *dev)
130 
131 {
132 	/* This is a crude check, but its the best one I have for now.
133 	   Certainly on the Maui and the Tropez, wavefront_fx_idle() will
134 	   report "never idle", which suggests that this test should
135 	   work OK.
136 	*/
137 
138 	if (inb (dev->fx_status) & 0x80) {
139 		snd_printk ("Hmm, probably a Maui or Tropez.\n");
140 		return -1;
141 	}
142 
143 	return 0;
144 }
145 
146 int
147 snd_wavefront_fx_open (struct snd_hwdep *hw, struct file *file)
148 
149 {
150 	if (!try_module_get(hw->card->module))
151 		return -EFAULT;
152 	file->private_data = hw;
153 	return 0;
154 }
155 
156 int
157 snd_wavefront_fx_release (struct snd_hwdep *hw, struct file *file)
158 
159 {
160 	module_put(hw->card->module);
161 	return 0;
162 }
163 
164 int
165 snd_wavefront_fx_ioctl (struct snd_hwdep *sdev, struct file *file,
166 			unsigned int cmd, unsigned long arg)
167 
168 {
169 	struct snd_card *card;
170 	snd_wavefront_card_t *acard;
171 	snd_wavefront_t *dev;
172 	wavefront_fx_info r;
173 	unsigned short *page_data = NULL;
174 	unsigned short *pd;
175 	int err = 0;
176 
177 	card = sdev->card;
178 	if (snd_BUG_ON(!card))
179 		return -ENODEV;
180 	if (snd_BUG_ON(!card->private_data))
181 		return -ENODEV;
182 
183 	acard = card->private_data;
184 	dev = &acard->wavefront;
185 
186 	if (copy_from_user (&r, (void __user *)arg, sizeof (wavefront_fx_info)))
187 		return -EFAULT;
188 
189 	switch (r.request) {
190 	case WFFX_MUTE:
191 		wavefront_fx_mute (dev, r.data[0]);
192 		return -EIO;
193 
194 	case WFFX_MEMSET:
195 		if (r.data[2] <= 0) {
196 			snd_printk ("cannot write "
197 				"<= 0 bytes to FX\n");
198 			return -EIO;
199 		} else if (r.data[2] == 1) {
200 			pd = (unsigned short *) &r.data[3];
201 		} else {
202 			if (r.data[2] > 256) {
203 				snd_printk ("cannot write "
204 					    "> 512 bytes to FX\n");
205 				return -EIO;
206 			}
207 			page_data = memdup_user((unsigned char __user *)
208 						r.data[3],
209 						r.data[2] * sizeof(short));
210 			if (IS_ERR(page_data))
211 				return PTR_ERR(page_data);
212 			pd = page_data;
213 		}
214 
215 		err = wavefront_fx_memset (dev,
216 			     r.data[0], /* page */
217 			     r.data[1], /* addr */
218 			     r.data[2], /* cnt */
219 			     pd);
220 		kfree(page_data);
221 		break;
222 
223 	default:
224 		snd_printk ("FX: ioctl %d not yet supported\n",
225 			    r.request);
226 		return -ENOTTY;
227 	}
228 	return err;
229 }
230 
231 /* YSS225 initialization.
232 
233    This code was developed using DOSEMU. The Turtle Beach SETUPSND
234    utility was run with I/O tracing in DOSEMU enabled, and a reconstruction
235    of the port I/O done, using the Yamaha faxback document as a guide
236    to add more logic to the code. Its really pretty weird.
237 
238    This is the approach of just dumping the whole I/O
239    sequence as a series of port/value pairs and a simple loop
240    that outputs it.
241 */
242 
243 int
244 snd_wavefront_fx_start (snd_wavefront_t *dev)
245 {
246 	unsigned int i;
247 	int err;
248 	const struct firmware *firmware = NULL;
249 
250 	if (dev->fx_initialized)
251 		return 0;
252 
253 	err = request_firmware(&firmware, "yamaha/yss225_registers.bin",
254 			       dev->card->dev);
255 	if (err < 0) {
256 		err = -1;
257 		goto out;
258 	}
259 
260 	for (i = 0; i + 1 < firmware->size; i += 2) {
261 		if (firmware->data[i] >= 8 && firmware->data[i] < 16) {
262 			outb(firmware->data[i + 1],
263 			     dev->base + firmware->data[i]);
264 		} else if (firmware->data[i] == WAIT_IDLE) {
265 			if (!wavefront_fx_idle(dev)) {
266 				err = -1;
267 				goto out;
268 			}
269 		} else {
270 			snd_printk(KERN_ERR "invalid address"
271 				   " in register data\n");
272 			err = -1;
273 			goto out;
274 		}
275 	}
276 
277 	dev->fx_initialized = 1;
278 	err = 0;
279 
280 out:
281 	release_firmware(firmware);
282 	return err;
283 }
284 
285 MODULE_FIRMWARE("yamaha/yss225_registers.bin");
286