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