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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> | |
26 | #include <linux/slab.h> | |
27 | ||
28 | #include "cx23885.h" | |
29 | ||
30 | static unsigned int vbibufs = 4; | |
31 | module_param(vbibufs, int, 0644); | |
32 | MODULE_PARM_DESC(vbibufs, "number of vbi buffers, range 2-32"); | |
33 | ||
4513fc69 | 34 | static unsigned int vbi_debug; |
e47f30b1 ST |
35 | module_param(vbi_debug, int, 0644); |
36 | MODULE_PARM_DESC(vbi_debug, "enable debug messages [vbi]"); | |
37 | ||
4513fc69 ST |
38 | #define dprintk(level, fmt, arg...)\ |
39 | do { if (vbi_debug >= level)\ | |
40 | printk(KERN_DEBUG "%s/0: " fmt, dev->name, ## arg);\ | |
41 | } while (0) | |
e47f30b1 ST |
42 | |
43 | /* ------------------------------------------------------------------ */ | |
44 | ||
45 | int cx23885_vbi_fmt(struct file *file, void *priv, | |
46 | struct v4l2_format *f) | |
47 | { | |
48 | struct cx23885_fh *fh = priv; | |
49 | struct cx23885_dev *dev = fh->dev; | |
50 | ||
51 | if (dev->tvnorm & V4L2_STD_525_60) { | |
52 | /* ntsc */ | |
53 | f->fmt.vbi.sampling_rate = 28636363; | |
54 | f->fmt.vbi.start[0] = 10; | |
55 | f->fmt.vbi.start[1] = 273; | |
56 | ||
57 | } else if (dev->tvnorm & V4L2_STD_625_50) { | |
58 | /* pal */ | |
59 | f->fmt.vbi.sampling_rate = 35468950; | |
60 | f->fmt.vbi.start[0] = 7 - 1; | |
61 | f->fmt.vbi.start[1] = 319 - 1; | |
62 | } | |
63 | return 0; | |
64 | } | |
65 | ||
66 | static int cx23885_start_vbi_dma(struct cx23885_dev *dev, | |
67 | struct cx23885_dmaqueue *q, | |
68 | struct cx23885_buffer *buf) | |
69 | { | |
70 | /* setup fifo + format */ | |
71 | cx23885_sram_channel_setup(dev, &dev->sram_channels[SRAM_CH02], | |
72 | buf->vb.width, buf->risc.dma); | |
73 | ||
74 | /* reset counter */ | |
75 | q->count = 1; | |
76 | ||
77 | /* enable irqs */ | |
78 | cx_set(PCI_INT_MSK, cx_read(PCI_INT_MSK) | 0x01); | |
79 | cx_set(VID_A_INT_MSK, 0x000022); | |
80 | ||
81 | /* start dma */ | |
82 | cx_set(DEV_CNTRL2, (1<<5)); | |
83 | cx_set(VID_A_DMA_CTL, 0x00000022); | |
84 | ||
85 | return 0; | |
86 | } | |
87 | ||
e47f30b1 | 88 | |
d45b9b8a | 89 | static int cx23885_restart_vbi_queue(struct cx23885_dev *dev, |
e47f30b1 ST |
90 | struct cx23885_dmaqueue *q) |
91 | { | |
92 | struct cx23885_buffer *buf; | |
93 | struct list_head *item; | |
94 | ||
95 | if (list_empty(&q->active)) | |
96 | return 0; | |
97 | ||
98 | buf = list_entry(q->active.next, struct cx23885_buffer, vb.queue); | |
99 | dprintk(2, "restart_queue [%p/%d]: restart dma\n", | |
100 | buf, buf->vb.i); | |
101 | cx23885_start_vbi_dma(dev, q, buf); | |
102 | list_for_each(item, &q->active) { | |
103 | buf = list_entry(item, struct cx23885_buffer, vb.queue); | |
104 | buf->count = q->count++; | |
105 | } | |
106 | mod_timer(&q->timeout, jiffies+BUFFER_TIMEOUT); | |
107 | return 0; | |
108 | } | |
109 | ||
110 | void cx23885_vbi_timeout(unsigned long data) | |
111 | { | |
112 | struct cx23885_dev *dev = (struct cx23885_dev *)data; | |
113 | struct cx23885_dmaqueue *q = &dev->vbiq; | |
114 | struct cx23885_buffer *buf; | |
115 | unsigned long flags; | |
116 | ||
117 | cx23885_sram_channel_dump(dev, &dev->sram_channels[SRAM_CH02]); | |
118 | ||
119 | cx_clear(VID_A_DMA_CTL, 0x22); | |
120 | ||
121 | spin_lock_irqsave(&dev->slock, flags); | |
122 | while (!list_empty(&q->active)) { | |
123 | buf = list_entry(q->active.next, struct cx23885_buffer, | |
124 | vb.queue); | |
125 | list_del(&buf->vb.queue); | |
126 | buf->vb.state = VIDEOBUF_ERROR; | |
127 | wake_up(&buf->vb.done); | |
128 | printk("%s/0: [%p/%d] timeout - dma=0x%08lx\n", dev->name, | |
129 | buf, buf->vb.i, (unsigned long)buf->risc.dma); | |
130 | } | |
131 | cx23885_restart_vbi_queue(dev, q); | |
132 | spin_unlock_irqrestore(&dev->slock, flags); | |
133 | } | |
134 | ||
135 | /* ------------------------------------------------------------------ */ | |
136 | #define VBI_LINE_LENGTH 2048 | |
137 | #define VBI_LINE_COUNT 17 | |
138 | ||
139 | static int | |
140 | vbi_setup(struct videobuf_queue *q, unsigned int *count, unsigned int *size) | |
141 | { | |
142 | *size = VBI_LINE_COUNT * VBI_LINE_LENGTH * 2; | |
143 | if (0 == *count) | |
144 | *count = vbibufs; | |
145 | if (*count < 2) | |
146 | *count = 2; | |
147 | if (*count > 32) | |
148 | *count = 32; | |
149 | return 0; | |
150 | } | |
151 | ||
152 | static int | |
153 | vbi_prepare(struct videobuf_queue *q, struct videobuf_buffer *vb, | |
154 | enum v4l2_field field) | |
155 | { | |
156 | struct cx23885_fh *fh = q->priv_data; | |
157 | struct cx23885_dev *dev = fh->dev; | |
158 | struct cx23885_buffer *buf = container_of(vb, | |
159 | struct cx23885_buffer, vb); | |
160 | struct videobuf_dmabuf *dma = videobuf_to_dma(&buf->vb); | |
161 | unsigned int size; | |
162 | int rc; | |
163 | ||
164 | size = VBI_LINE_COUNT * VBI_LINE_LENGTH * 2; | |
165 | if (0 != buf->vb.baddr && buf->vb.bsize < size) | |
166 | return -EINVAL; | |
167 | ||
168 | if (VIDEOBUF_NEEDS_INIT == buf->vb.state) { | |
169 | buf->vb.width = VBI_LINE_LENGTH; | |
170 | buf->vb.height = VBI_LINE_COUNT; | |
171 | buf->vb.size = size; | |
172 | buf->vb.field = V4L2_FIELD_SEQ_TB; | |
173 | ||
174 | rc = videobuf_iolock(q, &buf->vb, NULL); | |
175 | if (0 != rc) | |
176 | goto fail; | |
177 | cx23885_risc_buffer(dev->pci, &buf->risc, | |
178 | dma->sglist, | |
179 | 0, buf->vb.width * buf->vb.height, | |
180 | buf->vb.width, 0, | |
181 | buf->vb.height); | |
182 | } | |
183 | buf->vb.state = VIDEOBUF_PREPARED; | |
184 | return 0; | |
185 | ||
186 | fail: | |
187 | cx23885_free_buffer(q, buf); | |
188 | return rc; | |
189 | } | |
190 | ||
191 | static void | |
192 | vbi_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb) | |
193 | { | |
194 | struct cx23885_buffer *buf = | |
195 | container_of(vb, struct cx23885_buffer, vb); | |
196 | struct cx23885_buffer *prev; | |
197 | struct cx23885_fh *fh = vq->priv_data; | |
198 | struct cx23885_dev *dev = fh->dev; | |
199 | struct cx23885_dmaqueue *q = &dev->vbiq; | |
200 | ||
201 | /* add jump to stopper */ | |
202 | buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_IRQ1 | RISC_CNT_INC); | |
203 | buf->risc.jmp[1] = cpu_to_le32(q->stopper.dma); | |
204 | buf->risc.jmp[2] = cpu_to_le32(0); /* bits 63-32 */ | |
205 | ||
206 | if (list_empty(&q->active)) { | |
207 | list_add_tail(&buf->vb.queue, &q->active); | |
208 | cx23885_start_vbi_dma(dev, q, buf); | |
209 | buf->vb.state = VIDEOBUF_ACTIVE; | |
210 | buf->count = q->count++; | |
211 | mod_timer(&q->timeout, jiffies+BUFFER_TIMEOUT); | |
212 | dprintk(2, "[%p/%d] vbi_queue - first active\n", | |
213 | buf, buf->vb.i); | |
214 | ||
215 | } else { | |
216 | prev = list_entry(q->active.prev, struct cx23885_buffer, | |
217 | vb.queue); | |
218 | list_add_tail(&buf->vb.queue, &q->active); | |
219 | buf->vb.state = VIDEOBUF_ACTIVE; | |
220 | buf->count = q->count++; | |
221 | prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma); | |
222 | prev->risc.jmp[2] = cpu_to_le32(0); /* Bits 63-32 */ | |
223 | dprintk(2, "[%p/%d] buffer_queue - append to active\n", | |
224 | buf, buf->vb.i); | |
225 | } | |
226 | } | |
227 | ||
228 | static void vbi_release(struct videobuf_queue *q, struct videobuf_buffer *vb) | |
229 | { | |
230 | struct cx23885_buffer *buf = | |
231 | container_of(vb, struct cx23885_buffer, vb); | |
232 | ||
233 | cx23885_free_buffer(q, buf); | |
234 | } | |
235 | ||
236 | struct videobuf_queue_ops cx23885_vbi_qops = { | |
237 | .buf_setup = vbi_setup, | |
238 | .buf_prepare = vbi_prepare, | |
239 | .buf_queue = vbi_queue, | |
240 | .buf_release = vbi_release, | |
241 | }; | |
242 | ||
243 | /* ------------------------------------------------------------------ */ | |
244 | /* | |
245 | * Local variables: | |
246 | * c-basic-offset: 8 | |
247 | * End: | |
248 | */ |