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e47f30b1 ST |
1 | /* |
2 | * Driver for the Conexant CX23885 PCIe bridge | |
3 | * | |
6d897616 | 4 | * Copyright (c) 2007 Steven Toth <stoth@linuxtv.org> |
e47f30b1 ST |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
20 | */ | |
21 | ||
22 | #include <linux/kernel.h> | |
23 | #include <linux/module.h> | |
24 | #include <linux/moduleparam.h> | |
25 | #include <linux/init.h> | |
e47f30b1 ST |
26 | |
27 | #include "cx23885.h" | |
28 | ||
29 | static unsigned int vbibufs = 4; | |
30 | module_param(vbibufs, int, 0644); | |
31 | MODULE_PARM_DESC(vbibufs, "number of vbi buffers, range 2-32"); | |
32 | ||
4513fc69 | 33 | static unsigned int vbi_debug; |
e47f30b1 ST |
34 | module_param(vbi_debug, int, 0644); |
35 | MODULE_PARM_DESC(vbi_debug, "enable debug messages [vbi]"); | |
36 | ||
4513fc69 ST |
37 | #define dprintk(level, fmt, arg...)\ |
38 | do { if (vbi_debug >= level)\ | |
39 | printk(KERN_DEBUG "%s/0: " fmt, dev->name, ## arg);\ | |
40 | } while (0) | |
e47f30b1 ST |
41 | |
42 | /* ------------------------------------------------------------------ */ | |
43 | ||
4f9c4143 ST |
44 | #define VBI_LINE_LENGTH 1440 |
45 | #define NTSC_VBI_START_LINE 10 /* line 10 - 21 */ | |
46 | #define NTSC_VBI_END_LINE 21 | |
47 | #define NTSC_VBI_LINES (NTSC_VBI_END_LINE - NTSC_VBI_START_LINE + 1) | |
48 | ||
49 | ||
e47f30b1 ST |
50 | int cx23885_vbi_fmt(struct file *file, void *priv, |
51 | struct v4l2_format *f) | |
52 | { | |
53 | struct cx23885_fh *fh = priv; | |
54 | struct cx23885_dev *dev = fh->dev; | |
55 | ||
56 | if (dev->tvnorm & V4L2_STD_525_60) { | |
57 | /* ntsc */ | |
4f9c4143 | 58 | f->fmt.vbi.samples_per_line = VBI_LINE_LENGTH; |
5ab27e6d | 59 | f->fmt.vbi.sampling_rate = 27000000; |
4f9c4143 | 60 | f->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY; |
5ab27e6d ST |
61 | f->fmt.vbi.offset = 0; |
62 | f->fmt.vbi.flags = 0; | |
e47f30b1 | 63 | f->fmt.vbi.start[0] = 10; |
4f9c4143 | 64 | f->fmt.vbi.count[0] = 17; |
5ab27e6d | 65 | f->fmt.vbi.start[1] = 263 + 10 + 1; |
4f9c4143 | 66 | f->fmt.vbi.count[1] = 17; |
e47f30b1 ST |
67 | } else if (dev->tvnorm & V4L2_STD_625_50) { |
68 | /* pal */ | |
69 | f->fmt.vbi.sampling_rate = 35468950; | |
70 | f->fmt.vbi.start[0] = 7 - 1; | |
71 | f->fmt.vbi.start[1] = 319 - 1; | |
72 | } | |
4f9c4143 | 73 | |
e47f30b1 ST |
74 | return 0; |
75 | } | |
76 | ||
b5f74050 ST |
77 | /* We're given the Video Interrupt status register. |
78 | * The cx23885_video_irq() func has already validated | |
79 | * the potential error bits, we just need to | |
80 | * deal with vbi payload and return indication if | |
81 | * we actually processed any payload. | |
82 | */ | |
83 | int cx23885_vbi_irq(struct cx23885_dev *dev, u32 status) | |
84 | { | |
85 | u32 count; | |
86 | int handled = 0; | |
87 | ||
88 | if (status & VID_BC_MSK_VBI_RISCI1) { | |
89 | dprintk(1, "%s() VID_BC_MSK_VBI_RISCI1\n", __func__); | |
90 | spin_lock(&dev->slock); | |
91 | count = cx_read(VID_A_GPCNT); | |
92 | cx23885_video_wakeup(dev, &dev->vbiq, count); | |
93 | spin_unlock(&dev->slock); | |
94 | handled++; | |
95 | } | |
96 | ||
97 | if (status & VID_BC_MSK_VBI_RISCI2) { | |
98 | dprintk(1, "%s() VID_BC_MSK_VBI_RISCI2\n", __func__); | |
99 | dprintk(2, "stopper vbi\n"); | |
100 | spin_lock(&dev->slock); | |
101 | cx23885_restart_vbi_queue(dev, &dev->vbiq); | |
102 | spin_unlock(&dev->slock); | |
103 | handled++; | |
104 | } | |
105 | ||
106 | return handled; | |
107 | } | |
108 | ||
e47f30b1 ST |
109 | static int cx23885_start_vbi_dma(struct cx23885_dev *dev, |
110 | struct cx23885_dmaqueue *q, | |
111 | struct cx23885_buffer *buf) | |
112 | { | |
b5f74050 ST |
113 | dprintk(1, "%s()\n", __func__); |
114 | ||
e47f30b1 ST |
115 | /* setup fifo + format */ |
116 | cx23885_sram_channel_setup(dev, &dev->sram_channels[SRAM_CH02], | |
117 | buf->vb.width, buf->risc.dma); | |
118 | ||
119 | /* reset counter */ | |
b5f74050 | 120 | cx_write(VID_A_GPCNT_CTL, 3); |
4f9c4143 ST |
121 | cx_write(VID_A_VBI_CTRL, 3); |
122 | cx_write(VBI_A_GPCNT_CTL, 3); | |
e47f30b1 ST |
123 | q->count = 1; |
124 | ||
b5f74050 | 125 | /* enable irq */ |
dbe83a3b | 126 | cx23885_irq_add_enable(dev, 0x01); |
e47f30b1 ST |
127 | cx_set(VID_A_INT_MSK, 0x000022); |
128 | ||
129 | /* start dma */ | |
130 | cx_set(DEV_CNTRL2, (1<<5)); | |
b5f74050 | 131 | cx_set(VID_A_DMA_CTL, 0x22); /* FIFO and RISC enable */ |
e47f30b1 ST |
132 | |
133 | return 0; | |
134 | } | |
135 | ||
e47f30b1 | 136 | |
b5f74050 | 137 | int cx23885_restart_vbi_queue(struct cx23885_dev *dev, |
e47f30b1 ST |
138 | struct cx23885_dmaqueue *q) |
139 | { | |
140 | struct cx23885_buffer *buf; | |
141 | struct list_head *item; | |
142 | ||
143 | if (list_empty(&q->active)) | |
144 | return 0; | |
145 | ||
146 | buf = list_entry(q->active.next, struct cx23885_buffer, vb.queue); | |
147 | dprintk(2, "restart_queue [%p/%d]: restart dma\n", | |
148 | buf, buf->vb.i); | |
149 | cx23885_start_vbi_dma(dev, q, buf); | |
150 | list_for_each(item, &q->active) { | |
151 | buf = list_entry(item, struct cx23885_buffer, vb.queue); | |
152 | buf->count = q->count++; | |
153 | } | |
1ca3553a | 154 | mod_timer(&q->timeout, jiffies + (BUFFER_TIMEOUT / 30)); |
e47f30b1 ST |
155 | return 0; |
156 | } | |
157 | ||
158 | void cx23885_vbi_timeout(unsigned long data) | |
159 | { | |
160 | struct cx23885_dev *dev = (struct cx23885_dev *)data; | |
161 | struct cx23885_dmaqueue *q = &dev->vbiq; | |
162 | struct cx23885_buffer *buf; | |
163 | unsigned long flags; | |
164 | ||
b5f74050 | 165 | /* Stop the VBI engine */ |
e47f30b1 ST |
166 | cx_clear(VID_A_DMA_CTL, 0x22); |
167 | ||
168 | spin_lock_irqsave(&dev->slock, flags); | |
169 | while (!list_empty(&q->active)) { | |
170 | buf = list_entry(q->active.next, struct cx23885_buffer, | |
171 | vb.queue); | |
172 | list_del(&buf->vb.queue); | |
173 | buf->vb.state = VIDEOBUF_ERROR; | |
174 | wake_up(&buf->vb.done); | |
175 | printk("%s/0: [%p/%d] timeout - dma=0x%08lx\n", dev->name, | |
176 | buf, buf->vb.i, (unsigned long)buf->risc.dma); | |
177 | } | |
178 | cx23885_restart_vbi_queue(dev, q); | |
179 | spin_unlock_irqrestore(&dev->slock, flags); | |
180 | } | |
181 | ||
182 | /* ------------------------------------------------------------------ */ | |
4f9c4143 | 183 | #define VBI_LINE_LENGTH 1440 |
e47f30b1 ST |
184 | #define VBI_LINE_COUNT 17 |
185 | ||
186 | static int | |
187 | vbi_setup(struct videobuf_queue *q, unsigned int *count, unsigned int *size) | |
188 | { | |
189 | *size = VBI_LINE_COUNT * VBI_LINE_LENGTH * 2; | |
190 | if (0 == *count) | |
191 | *count = vbibufs; | |
192 | if (*count < 2) | |
193 | *count = 2; | |
194 | if (*count > 32) | |
195 | *count = 32; | |
196 | return 0; | |
197 | } | |
198 | ||
199 | static int | |
200 | vbi_prepare(struct videobuf_queue *q, struct videobuf_buffer *vb, | |
201 | enum v4l2_field field) | |
202 | { | |
203 | struct cx23885_fh *fh = q->priv_data; | |
204 | struct cx23885_dev *dev = fh->dev; | |
205 | struct cx23885_buffer *buf = container_of(vb, | |
206 | struct cx23885_buffer, vb); | |
207 | struct videobuf_dmabuf *dma = videobuf_to_dma(&buf->vb); | |
208 | unsigned int size; | |
209 | int rc; | |
210 | ||
211 | size = VBI_LINE_COUNT * VBI_LINE_LENGTH * 2; | |
212 | if (0 != buf->vb.baddr && buf->vb.bsize < size) | |
213 | return -EINVAL; | |
214 | ||
215 | if (VIDEOBUF_NEEDS_INIT == buf->vb.state) { | |
216 | buf->vb.width = VBI_LINE_LENGTH; | |
217 | buf->vb.height = VBI_LINE_COUNT; | |
218 | buf->vb.size = size; | |
219 | buf->vb.field = V4L2_FIELD_SEQ_TB; | |
220 | ||
221 | rc = videobuf_iolock(q, &buf->vb, NULL); | |
222 | if (0 != rc) | |
223 | goto fail; | |
5ab27e6d | 224 | cx23885_risc_vbibuffer(dev->pci, &buf->risc, |
e47f30b1 ST |
225 | dma->sglist, |
226 | 0, buf->vb.width * buf->vb.height, | |
227 | buf->vb.width, 0, | |
228 | buf->vb.height); | |
229 | } | |
230 | buf->vb.state = VIDEOBUF_PREPARED; | |
231 | return 0; | |
232 | ||
233 | fail: | |
234 | cx23885_free_buffer(q, buf); | |
235 | return rc; | |
236 | } | |
237 | ||
238 | static void | |
239 | vbi_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb) | |
240 | { | |
241 | struct cx23885_buffer *buf = | |
242 | container_of(vb, struct cx23885_buffer, vb); | |
243 | struct cx23885_buffer *prev; | |
244 | struct cx23885_fh *fh = vq->priv_data; | |
245 | struct cx23885_dev *dev = fh->dev; | |
246 | struct cx23885_dmaqueue *q = &dev->vbiq; | |
247 | ||
248 | /* add jump to stopper */ | |
249 | buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_IRQ1 | RISC_CNT_INC); | |
250 | buf->risc.jmp[1] = cpu_to_le32(q->stopper.dma); | |
251 | buf->risc.jmp[2] = cpu_to_le32(0); /* bits 63-32 */ | |
252 | ||
253 | if (list_empty(&q->active)) { | |
254 | list_add_tail(&buf->vb.queue, &q->active); | |
255 | cx23885_start_vbi_dma(dev, q, buf); | |
256 | buf->vb.state = VIDEOBUF_ACTIVE; | |
257 | buf->count = q->count++; | |
1ca3553a | 258 | mod_timer(&q->timeout, jiffies + (BUFFER_TIMEOUT / 30)); |
e47f30b1 ST |
259 | dprintk(2, "[%p/%d] vbi_queue - first active\n", |
260 | buf, buf->vb.i); | |
261 | ||
262 | } else { | |
263 | prev = list_entry(q->active.prev, struct cx23885_buffer, | |
264 | vb.queue); | |
265 | list_add_tail(&buf->vb.queue, &q->active); | |
266 | buf->vb.state = VIDEOBUF_ACTIVE; | |
267 | buf->count = q->count++; | |
268 | prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma); | |
269 | prev->risc.jmp[2] = cpu_to_le32(0); /* Bits 63-32 */ | |
270 | dprintk(2, "[%p/%d] buffer_queue - append to active\n", | |
271 | buf, buf->vb.i); | |
272 | } | |
273 | } | |
274 | ||
275 | static void vbi_release(struct videobuf_queue *q, struct videobuf_buffer *vb) | |
276 | { | |
277 | struct cx23885_buffer *buf = | |
278 | container_of(vb, struct cx23885_buffer, vb); | |
279 | ||
280 | cx23885_free_buffer(q, buf); | |
281 | } | |
282 | ||
283 | struct videobuf_queue_ops cx23885_vbi_qops = { | |
284 | .buf_setup = vbi_setup, | |
285 | .buf_prepare = vbi_prepare, | |
286 | .buf_queue = vbi_queue, | |
287 | .buf_release = vbi_release, | |
288 | }; | |
289 | ||
290 | /* ------------------------------------------------------------------ */ | |
291 | /* | |
292 | * Local variables: | |
293 | * c-basic-offset: 8 | |
294 | * End: | |
295 | */ |