diff options
Diffstat (limited to 'drivers/media/pci/cx23885/cx23885-vbi.c')
-rw-r--r-- | drivers/media/pci/cx23885/cx23885-vbi.c | 295 |
1 files changed, 295 insertions, 0 deletions
diff --git a/drivers/media/pci/cx23885/cx23885-vbi.c b/drivers/media/pci/cx23885/cx23885-vbi.c new file mode 100644 index 000000000000..a1154f035bc1 --- /dev/null +++ b/drivers/media/pci/cx23885/cx23885-vbi.c | |||
@@ -0,0 +1,295 @@ | |||
1 | /* | ||
2 | * Driver for the Conexant CX23885 PCIe bridge | ||
3 | * | ||
4 | * Copyright (c) 2007 Steven Toth <stoth@linuxtv.org> | ||
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> | ||
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 | |||
33 | static unsigned int vbi_debug; | ||
34 | module_param(vbi_debug, int, 0644); | ||
35 | MODULE_PARM_DESC(vbi_debug, "enable debug messages [vbi]"); | ||
36 | |||
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) | ||
41 | |||
42 | /* ------------------------------------------------------------------ */ | ||
43 | |||
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 | |||
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 */ | ||
58 | f->fmt.vbi.samples_per_line = VBI_LINE_LENGTH; | ||
59 | f->fmt.vbi.sampling_rate = 27000000; | ||
60 | f->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY; | ||
61 | f->fmt.vbi.offset = 0; | ||
62 | f->fmt.vbi.flags = 0; | ||
63 | f->fmt.vbi.start[0] = 10; | ||
64 | f->fmt.vbi.count[0] = 17; | ||
65 | f->fmt.vbi.start[1] = 263 + 10 + 1; | ||
66 | f->fmt.vbi.count[1] = 17; | ||
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 | } | ||
73 | |||
74 | return 0; | ||
75 | } | ||
76 | |||
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 | |||
109 | static int cx23885_start_vbi_dma(struct cx23885_dev *dev, | ||
110 | struct cx23885_dmaqueue *q, | ||
111 | struct cx23885_buffer *buf) | ||
112 | { | ||
113 | dprintk(1, "%s()\n", __func__); | ||
114 | |||
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 */ | ||
120 | cx_write(VID_A_GPCNT_CTL, 3); | ||
121 | cx_write(VID_A_VBI_CTRL, 3); | ||
122 | cx_write(VBI_A_GPCNT_CTL, 3); | ||
123 | q->count = 1; | ||
124 | |||
125 | /* enable irq */ | ||
126 | cx23885_irq_add_enable(dev, 0x01); | ||
127 | cx_set(VID_A_INT_MSK, 0x000022); | ||
128 | |||
129 | /* start dma */ | ||
130 | cx_set(DEV_CNTRL2, (1<<5)); | ||
131 | cx_set(VID_A_DMA_CTL, 0x22); /* FIFO and RISC enable */ | ||
132 | |||
133 | return 0; | ||
134 | } | ||
135 | |||
136 | |||
137 | int cx23885_restart_vbi_queue(struct cx23885_dev *dev, | ||
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 | } | ||
154 | mod_timer(&q->timeout, jiffies + (BUFFER_TIMEOUT / 30)); | ||
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 | |||
165 | /* Stop the VBI engine */ | ||
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 | /* ------------------------------------------------------------------ */ | ||
183 | #define VBI_LINE_LENGTH 1440 | ||
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; | ||
224 | cx23885_risc_vbibuffer(dev->pci, &buf->risc, | ||
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++; | ||
258 | mod_timer(&q->timeout, jiffies + (BUFFER_TIMEOUT / 30)); | ||
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 | */ | ||