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 <asm/io.h>
20 #include <linux/init.h>
21 #include <linux/time.h>
22 #include <linux/wait.h>
23 #include <linux/firmware.h>
24 #include <sound/core.h>
25 #include <sound/snd_wavefront.h>
26 #include <sound/initval.h>
27 
28 /* Control bits for the Load Control Register
29  */
30 
31 #define FX_LSB_TRANSFER 0x01    /* transfer after DSP LSB byte written */
32 #define FX_MSB_TRANSFER 0x02    /* transfer after DSP MSB byte written */
33 #define FX_AUTO_INCR    0x04    /* auto-increment DSP address after transfer */
34 
35 #define WAIT_IDLE	0xff
36 
37 #ifdef CONFIG_SND_WAVEFRONT_FIRMWARE_IN_KERNEL
38 #include "yss225.c"
39 static const struct firmware yss225_registers_firmware = {
40 	.data = (u8 *)yss225_registers,
41 	.size = sizeof yss225_registers
42 };
43 #endif
44 
45 static int
46 wavefront_fx_idle (snd_wavefront_t *dev)
47 
48 {
49 	int i;
50 	unsigned int x = 0x80;
51 
52 	for (i = 0; i < 1000; i++) {
53 		x = inb (dev->fx_status);
54 		if ((x & 0x80) == 0) {
55 			break;
56 		}
57 	}
58 
59 	if (x & 0x80) {
60 		snd_printk ("FX device never idle.\n");
61 		return 0;
62 	}
63 
64 	return (1);
65 }
66 
67 static void
68 wavefront_fx_mute (snd_wavefront_t *dev, int onoff)
69 
70 {
71 	if (!wavefront_fx_idle(dev)) {
72 		return;
73 	}
74 
75 	outb (onoff ? 0x02 : 0x00, dev->fx_op);
76 }
77 
78 static int
79 wavefront_fx_memset (snd_wavefront_t *dev,
80 		     int page,
81 		     int addr,
82 		     int cnt,
83 		     unsigned short *data)
84 {
85 	if (page < 0 || page > 7) {
86 		snd_printk ("FX memset: "
87 			"page must be >= 0 and <= 7\n");
88 		return -(EINVAL);
89 	}
90 
91 	if (addr < 0 || addr > 0x7f) {
92 		snd_printk ("FX memset: "
93 			"addr must be >= 0 and <= 7f\n");
94 		return -(EINVAL);
95 	}
96 
97 	if (cnt == 1) {
98 
99 		outb (FX_LSB_TRANSFER, dev->fx_lcr);
100 		outb (page, dev->fx_dsp_page);
101 		outb (addr, dev->fx_dsp_addr);
102 		outb ((data[0] >> 8), dev->fx_dsp_msb);
103 		outb ((data[0] & 0xff), dev->fx_dsp_lsb);
104 
105 		snd_printk ("FX: addr %d:%x set to 0x%x\n",
106 			page, addr, data[0]);
107 
108 	} else {
109 		int i;
110 
111 		outb (FX_AUTO_INCR|FX_LSB_TRANSFER, dev->fx_lcr);
112 		outb (page, dev->fx_dsp_page);
113 		outb (addr, dev->fx_dsp_addr);
114 
115 		for (i = 0; i < cnt; i++) {
116 			outb ((data[i] >> 8), dev->fx_dsp_msb);
117 			outb ((data[i] & 0xff), dev->fx_dsp_lsb);
118 			if (!wavefront_fx_idle (dev)) {
119 				break;
120 			}
121 		}
122 
123 		if (i != cnt) {
124 			snd_printk ("FX memset "
125 				    "(0x%x, 0x%x, 0x%lx, %d) incomplete\n",
126 				    page, addr, (unsigned long) data, cnt);
127 			return -(EIO);
128 		}
129 	}
130 
131 	return 0;
132 }
133 
134 int
135 snd_wavefront_fx_detect (snd_wavefront_t *dev)
136 
137 {
138 	/* This is a crude check, but its the best one I have for now.
139 	   Certainly on the Maui and the Tropez, wavefront_fx_idle() will
140 	   report "never idle", which suggests that this test should
141 	   work OK.
142 	*/
143 
144 	if (inb (dev->fx_status) & 0x80) {
145 		snd_printk ("Hmm, probably a Maui or Tropez.\n");
146 		return -1;
147 	}
148 
149 	return 0;
150 }
151 
152 int
153 snd_wavefront_fx_open (struct snd_hwdep *hw, struct file *file)
154 
155 {
156 	if (!try_module_get(hw->card->module))
157 		return -EFAULT;
158 	file->private_data = hw;
159 	return 0;
160 }
161 
162 int
163 snd_wavefront_fx_release (struct snd_hwdep *hw, struct file *file)
164 
165 {
166 	module_put(hw->card->module);
167 	return 0;
168 }
169 
170 int
171 snd_wavefront_fx_ioctl (struct snd_hwdep *sdev, struct file *file,
172 			unsigned int cmd, unsigned long arg)
173 
174 {
175 	struct snd_card *card;
176 	snd_wavefront_card_t *acard;
177 	snd_wavefront_t *dev;
178 	wavefront_fx_info r;
179 	unsigned short *page_data = NULL;
180 	unsigned short *pd;
181 	int err = 0;
182 
183 	card = sdev->card;
184 	if (snd_BUG_ON(!card))
185 		return -ENODEV;
186 	if (snd_BUG_ON(!card->private_data))
187 		return -ENODEV;
188 
189 	acard = card->private_data;
190 	dev = &acard->wavefront;
191 
192 	if (copy_from_user (&r, (void __user *)arg, sizeof (wavefront_fx_info)))
193 		return -EFAULT;
194 
195 	switch (r.request) {
196 	case WFFX_MUTE:
197 		wavefront_fx_mute (dev, r.data[0]);
198 		return -EIO;
199 
200 	case WFFX_MEMSET:
201 		if (r.data[2] <= 0) {
202 			snd_printk ("cannot write "
203 				"<= 0 bytes to FX\n");
204 			return -EIO;
205 		} else if (r.data[2] == 1) {
206 			pd = (unsigned short *) &r.data[3];
207 		} else {
208 			if (r.data[2] > 256) {
209 				snd_printk ("cannot write "
210 					    "> 512 bytes to FX\n");
211 				return -EIO;
212 			}
213 			page_data = kmalloc(r.data[2] * sizeof(short), GFP_KERNEL);
214 			if (!page_data)
215 				return -ENOMEM;
216 			if (copy_from_user (page_data,
217 					    (unsigned char __user *) r.data[3],
218 					    r.data[2] * sizeof(short))) {
219 				kfree(page_data);
220 				return -EFAULT;
221 			}
222 			pd = page_data;
223 		}
224 
225 		err = wavefront_fx_memset (dev,
226 			     r.data[0], /* page */
227 			     r.data[1], /* addr */
228 			     r.data[2], /* cnt */
229 			     pd);
230 		kfree(page_data);
231 		break;
232 
233 	default:
234 		snd_printk ("FX: ioctl %d not yet supported\n",
235 			    r.request);
236 		return -ENOTTY;
237 	}
238 	return err;
239 }
240 
241 /* YSS225 initialization.
242 
243    This code was developed using DOSEMU. The Turtle Beach SETUPSND
244    utility was run with I/O tracing in DOSEMU enabled, and a reconstruction
245    of the port I/O done, using the Yamaha faxback document as a guide
246    to add more logic to the code. Its really pretty weird.
247 
248    This is the approach of just dumping the whole I/O
249    sequence as a series of port/value pairs and a simple loop
250    that outputs it.
251 */
252 
253 int __devinit
254 snd_wavefront_fx_start (snd_wavefront_t *dev)
255 {
256 	unsigned int i;
257 	int err;
258 	const struct firmware *firmware = NULL;
259 
260 	if (dev->fx_initialized)
261 		return 0;
262 
263 #ifdef CONFIG_SND_WAVEFRONT_FIRMWARE_IN_KERNEL
264 	firmware = &yss225_registers_firmware;
265 #else
266 	err = request_firmware(&firmware, "yamaha/yss225_registers.bin",
267 			       dev->card->dev);
268 	if (err < 0) {
269 		err = -1;
270 		goto out;
271 	}
272 #endif
273 
274 	for (i = 0; i + 1 < firmware->size; i += 2) {
275 		if (firmware->data[i] >= 8 && firmware->data[i] < 16) {
276 			outb(firmware->data[i + 1],
277 			     dev->base + firmware->data[i]);
278 		} else if (firmware->data[i] == WAIT_IDLE) {
279 			if (!wavefront_fx_idle(dev)) {
280 				err = -1;
281 				goto out;
282 			}
283 		} else {
284 			snd_printk(KERN_ERR "invalid address"
285 				   " in register data\n");
286 			err = -1;
287 			goto out;
288 		}
289 	}
290 
291 	dev->fx_initialized = 1;
292 	err = 0;
293 
294 out:
295 #ifndef CONFIG_SND_WAVEFRONT_FIRMWARE_IN_KERNEL
296 	release_firmware(firmware);
297 #endif
298 	return err;
299 }
300 
301 #ifndef CONFIG_SND_WAVEFRONT_FIRMWARE_IN_KERNEL
302 MODULE_FIRMWARE("yamaha/yss225_registers.bin");
303 #endif
304