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 29static unsigned int vbibufs = 4; 30module_param(vbibufs, int, 0644); 31MODULE_PARM_DESC(vbibufs, "number of vbi buffers, range 2-32"); 32 33static unsigned int vbi_debug; 34module_param(vbi_debug, int, 0644); 35MODULE_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 44int cx23885_vbi_fmt(struct file *file, void *priv, 45 struct v4l2_format *f) 46{ 47 struct cx23885_fh *fh = priv; 48 struct cx23885_dev *dev = fh->dev; 49 50 if (dev->tvnorm & V4L2_STD_525_60) { 51 /* ntsc */ 52 f->fmt.vbi.sampling_rate = 28636363; 53 f->fmt.vbi.start[0] = 10; 54 f->fmt.vbi.start[1] = 273; 55 56 } else if (dev->tvnorm & V4L2_STD_625_50) { 57 /* pal */ 58 f->fmt.vbi.sampling_rate = 35468950; 59 f->fmt.vbi.start[0] = 7 - 1; 60 f->fmt.vbi.start[1] = 319 - 1; 61 } 62 return 0; 63} 64 65static int cx23885_start_vbi_dma(struct cx23885_dev *dev, 66 struct cx23885_dmaqueue *q, 67 struct cx23885_buffer *buf) 68{ 69 /* setup fifo + format */ 70 cx23885_sram_channel_setup(dev, &dev->sram_channels[SRAM_CH02], 71 buf->vb.width, buf->risc.dma); 72 73 /* reset counter */ 74 q->count = 1; 75 76 /* enable irqs */ 77 cx23885_irq_add_enable(dev, 0x01); 78 cx_set(VID_A_INT_MSK, 0x000022); 79 80 /* start dma */ 81 cx_set(DEV_CNTRL2, (1<<5)); 82 cx_set(VID_A_DMA_CTL, 0x00000022); 83 84 return 0; 85} 86 87 88static int cx23885_restart_vbi_queue(struct cx23885_dev *dev, 89 struct cx23885_dmaqueue *q) 90{ 91 struct cx23885_buffer *buf; 92 struct list_head *item; 93 94 if (list_empty(&q->active)) 95 return 0; 96 97 buf = list_entry(q->active.next, struct cx23885_buffer, vb.queue); 98 dprintk(2, "restart_queue [%p/%d]: restart dma\n", 99 buf, buf->vb.i); 100 cx23885_start_vbi_dma(dev, q, buf); 101 list_for_each(item, &q->active) { 102 buf = list_entry(item, struct cx23885_buffer, vb.queue); 103 buf->count = q->count++; 104 } 105 mod_timer(&q->timeout, jiffies+BUFFER_TIMEOUT); 106 return 0; 107} 108 109void cx23885_vbi_timeout(unsigned long data) 110{ 111 struct cx23885_dev *dev = (struct cx23885_dev *)data; 112 struct cx23885_dmaqueue *q = &dev->vbiq; 113 struct cx23885_buffer *buf; 114 unsigned long flags; 115 116 cx23885_sram_channel_dump(dev, &dev->sram_channels[SRAM_CH02]); 117 118 cx_clear(VID_A_DMA_CTL, 0x22); 119 120 spin_lock_irqsave(&dev->slock, flags); 121 while (!list_empty(&q->active)) { 122 buf = list_entry(q->active.next, struct cx23885_buffer, 123 vb.queue); 124 list_del(&buf->vb.queue); 125 buf->vb.state = VIDEOBUF_ERROR; 126 wake_up(&buf->vb.done); 127 printk("%s/0: [%p/%d] timeout - dma=0x%08lx\n", dev->name, 128 buf, buf->vb.i, (unsigned long)buf->risc.dma); 129 } 130 cx23885_restart_vbi_queue(dev, q); 131 spin_unlock_irqrestore(&dev->slock, flags); 132} 133 134/* ------------------------------------------------------------------ */ 135#define VBI_LINE_LENGTH 2048 136#define VBI_LINE_COUNT 17 137 138static int 139vbi_setup(struct videobuf_queue *q, unsigned int *count, unsigned int *size) 140{ 141 *size = VBI_LINE_COUNT * VBI_LINE_LENGTH * 2; 142 if (0 == *count) 143 *count = vbibufs; 144 if (*count < 2) 145 *count = 2; 146 if (*count > 32) 147 *count = 32; 148 return 0; 149} 150 151static int 152vbi_prepare(struct videobuf_queue *q, struct videobuf_buffer *vb, 153 enum v4l2_field field) 154{ 155 struct cx23885_fh *fh = q->priv_data; 156 struct cx23885_dev *dev = fh->dev; 157 struct cx23885_buffer *buf = container_of(vb, 158 struct cx23885_buffer, vb); 159 struct videobuf_dmabuf *dma = videobuf_to_dma(&buf->vb); 160 unsigned int size; 161 int rc; 162 163 size = VBI_LINE_COUNT * VBI_LINE_LENGTH * 2; 164 if (0 != buf->vb.baddr && buf->vb.bsize < size) 165 return -EINVAL; 166 167 if (VIDEOBUF_NEEDS_INIT == buf->vb.state) { 168 buf->vb.width = VBI_LINE_LENGTH; 169 buf->vb.height = VBI_LINE_COUNT; 170 buf->vb.size = size; 171 buf->vb.field = V4L2_FIELD_SEQ_TB; 172 173 rc = videobuf_iolock(q, &buf->vb, NULL); 174 if (0 != rc) 175 goto fail; 176 cx23885_risc_buffer(dev->pci, &buf->risc, 177 dma->sglist, 178 0, buf->vb.width * buf->vb.height, 179 buf->vb.width, 0, 180 buf->vb.height); 181 } 182 buf->vb.state = VIDEOBUF_PREPARED; 183 return 0; 184 185 fail: 186 cx23885_free_buffer(q, buf); 187 return rc; 188} 189 190static void 191vbi_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb) 192{ 193 struct cx23885_buffer *buf = 194 container_of(vb, struct cx23885_buffer, vb); 195 struct cx23885_buffer *prev; 196 struct cx23885_fh *fh = vq->priv_data; 197 struct cx23885_dev *dev = fh->dev; 198 struct cx23885_dmaqueue *q = &dev->vbiq; 199 200 /* add jump to stopper */ 201 buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_IRQ1 | RISC_CNT_INC); 202 buf->risc.jmp[1] = cpu_to_le32(q->stopper.dma); 203 buf->risc.jmp[2] = cpu_to_le32(0); /* bits 63-32 */ 204 205 if (list_empty(&q->active)) { 206 list_add_tail(&buf->vb.queue, &q->active); 207 cx23885_start_vbi_dma(dev, q, buf); 208 buf->vb.state = VIDEOBUF_ACTIVE; 209 buf->count = q->count++; 210 mod_timer(&q->timeout, jiffies+BUFFER_TIMEOUT); 211 dprintk(2, "[%p/%d] vbi_queue - first active\n", 212 buf, buf->vb.i); 213 214 } else { 215 prev = list_entry(q->active.prev, struct cx23885_buffer, 216 vb.queue); 217 list_add_tail(&buf->vb.queue, &q->active); 218 buf->vb.state = VIDEOBUF_ACTIVE; 219 buf->count = q->count++; 220 prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma); 221 prev->risc.jmp[2] = cpu_to_le32(0); /* Bits 63-32 */ 222 dprintk(2, "[%p/%d] buffer_queue - append to active\n", 223 buf, buf->vb.i); 224 } 225} 226 227static void vbi_release(struct videobuf_queue *q, struct videobuf_buffer *vb) 228{ 229 struct cx23885_buffer *buf = 230 container_of(vb, struct cx23885_buffer, vb); 231 232 cx23885_free_buffer(q, buf); 233} 234 235struct videobuf_queue_ops cx23885_vbi_qops = { 236 .buf_setup = vbi_setup, 237 .buf_prepare = vbi_prepare, 238 .buf_queue = vbi_queue, 239 .buf_release = vbi_release, 240}; 241 242/* ------------------------------------------------------------------ */ 243/* 244 * Local variables: 245 * c-basic-offset: 8 246 * End: 247 */ 248