planb.c
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上传日期:2013-04-10
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文件大小:70k
- /*
- planb - v4l-compatible frame grabber driver for the PlanB hardware
- PlanB is used in the 7x00/8x00 series of PowerMacintosh
- Computers as video input DMA controller.
- Copyright (C) 1998 - 2002 Michel Lanners <mailto:mlan@cpu.lu>
- Based largely on the old bttv driver by Ralph Metzler
- Additional debugging and coding by Takashi Oe <mailto:toe@unlserve.unl.edu>
- For more information, see <http://www.cpu.lu/~mlan/planb.html>
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
- /* $Id: planb.c,v 2.11 2002/04/03 15:57:57 mlan Exp mlan $ */
- #include <linux/version.h>
- #include <linux/init.h>
- #include <linux/errno.h>
- #include <linux/module.h>
- #include <linux/kernel.h>
- #include <linux/major.h>
- #include <linux/slab.h>
- #include <linux/types.h>
- #include <linux/pci.h>
- #include <linux/delay.h>
- #include <linux/vmalloc.h>
- #include <linux/mm.h>
- #include <linux/sched.h>
- #include <linux/poll.h>
- #include <linux/wrapper.h>
- #include <linux/tqueue.h>
- #include <linux/videodev.h>
- #include <asm/uaccess.h>
- #include <asm/io.h>
- #include <asm/prom.h>
- #include <asm/dbdma.h>
- #include <asm/pgtable.h>
- #include <asm/page.h>
- #include <asm/irq.h>
- #include <asm/semaphore.h>
- /* Define these to get general / interrupt debugging */
- #undef DEBUG
- #undef IDEBUG
- //#define DEBUG
- #ifdef DEBUG
- #define DBG(x...) printk(KERN_DEBUG ## x)
- #else
- #define DBG(x...)
- #endif
- #ifdef IDEBUG
- #define IDBG(x...) printk(KERN_DEBUG ## x)
- #else
- #define IDBG(x...)
- #endif
- #include "planb.h"
- #include "saa7196.h"
- static struct planb planbs;
- static volatile struct planb_registers *planb_regs;
- static int def_norm = PLANB_DEF_NORM; /* default norm */
- static int video_nr = -1;
- static int vbi_nr = -1;
- MODULE_PARM(def_norm, "i");
- MODULE_PARM_DESC(def_norm, "Default startup norm (0=PAL, 1=NTSC, 2=SECAM)");
- MODULE_PARM(video_nr,"i");
- MODULE_PARM(vbi_nr,"i");
- MODULE_DESCRIPTION("planb - v4l driver module for Apple PlanB video in");
- MODULE_AUTHOR("Michel Lanners & Takashi Oe - see: http://www.cpu.lu/planb.html");
- MODULE_LICENSE("GPL");
- /* ------------------ PlanB Exported Functions ------------------ */
- static long planb_write(struct video_device *, const char *, unsigned long, int);
- static long planb_read(struct video_device *, char *, unsigned long, int);
- static int planb_open(struct video_device *, int);
- static void planb_close(struct video_device *);
- static int planb_ioctl(struct video_device *, unsigned int, void *);
- static int planb_mmap(struct video_device *, const char *, unsigned long);
- static void planb_irq(int, void *, struct pt_regs *);
- static int planb_vbi_open(struct video_device *, int);
- static void planb_vbi_close(struct video_device *);
- static long planb_vbi_read(struct video_device *, char *, unsigned long, int);
- static unsigned int planb_vbi_poll(struct video_device *, struct file *,
- poll_table *);
- static int planb_vbi_ioctl(struct video_device *, unsigned int, void *);
- static void release_planb(void);
- static int __init init_planbs(void);
- static void __exit exit_planbs(void);
- /* ------------------ PlanB Internal Functions ------------------ */
- static int planb_prepare_open(struct planb *);
- static int planb_prepare_vbi(struct planb *);
- static int planb_prepare_video(struct planb *);
- static void planb_prepare_close(struct planb *);
- static void planb_close_vbi(struct planb *);
- static void planb_close_video(struct planb *);
- static void saa_write_reg(unsigned char, unsigned char);
- static unsigned char saa_status(int, struct planb *);
- static void saa_set(unsigned char, unsigned char, struct planb *);
- static void saa_init_regs(struct planb *);
- static int grabbuf_alloc(struct planb *);
- static int vgrab(struct planb *, struct video_mmap *);
- static void add_clip(struct planb *, struct video_clip *);
- static void fill_cmd_buff(struct planb *);
- static void cmd_buff(struct planb *);
- static dbdma_cmd_ptr setup_grab_cmd(int, struct planb *);
- static void overlay_start(struct planb *);
- static void overlay_stop(struct planb *);
- static inline void tab_cmd_dbdma(dbdma_cmd_ptr, unsigned short, unsigned int);
- static inline void tab_cmd_store(dbdma_cmd_ptr, unsigned int, unsigned int);
- static inline void tab_cmd_gen(dbdma_cmd_ptr, unsigned short, unsigned short,
- unsigned int, unsigned int);
- static int init_planb(struct planb *);
- static int find_planb(void);
- static void planb_pre_capture(int, struct planb *);
- static dbdma_cmd_ptr cmd_geo_setup(dbdma_cmd_ptr, int, int, int, int, int,
- struct planb *);
- static inline void planb_dbdma_stop(dbdma_regs_ptr);
- static inline void planb_dbdma_restart(dbdma_regs_ptr);
- static void saa_geo_setup(int, int, int, int, struct planb *);
- static inline int overlay_is_active(struct planb *);
- /*******************************/
- /* Memory management functions */
- /*******************************/
- /* I know this is not the right way to allocate memory. Whoever knows
- * the right way to allocate a huge buffer for DMA that can be mapped
- * to user space, please tell me... or better, fix the code and send
- * patches.
- *
- * Michel Lanners (mlan@cpu.lu)
- */
- /* FIXME: As subsequent calls to __get_free_pages don't necessarily return
- * contiguous pages, we need to do horrible things later on when setting
- * up DMA, to make sure a single DMA transfer doesn't cross a page boundary.
- * At least, I hope it's done right later on ;-) ......
- * Anyway, there should be a way to get hold of a large buffer of contiguous
- * pages for DMA....
- */
- static int grabbuf_alloc(struct planb *pb)
- {
- int i, npage;
- npage = MAX_GBUFFERS * ((PLANB_MAX_FBUF / PAGE_SIZE + 1)
- #ifndef PLANB_GSCANLINE
- + MAX_LNUM
- #endif /* PLANB_GSCANLINE */
- );
- if ((pb->rawbuf = (unsigned char**) kmalloc (npage
- * sizeof(unsigned long), GFP_KERNEL)) == 0)
- return -ENOMEM;
- for (i = 0; i < npage; i++) {
- pb->rawbuf[i] = (unsigned char *)__get_free_pages(GFP_KERNEL |
- GFP_DMA, 0);
- if (!pb->rawbuf[i])
- break;
- mem_map_reserve(virt_to_page(pb->rawbuf[i]));
- }
- if (i-- < npage) {
- DBG("PlanB: init_grab: grab buffer not allocatedn");
- for (; i > 0; i--) {
- mem_map_unreserve(virt_to_page(pb->rawbuf[i]));
- free_pages((unsigned long)pb->rawbuf[i], 0);
- }
- kfree(pb->rawbuf);
- return -ENOBUFS;
- }
- pb->rawbuf_nchunks = npage;
- return 0;
- }
- /*****************************/
- /* Hardware access functions */
- /*****************************/
- static void saa_write_reg(unsigned char addr, unsigned char val)
- {
- planb_regs->saa_addr = addr; eieio();
- planb_regs->saa_regval = val; eieio();
- return;
- }
- /* return status byte 0 or 1: */
- static unsigned char saa_status(int byte, struct planb *pb)
- {
- saa_regs[pb->win.norm][SAA7196_STDC] =
- (saa_regs[pb->win.norm][SAA7196_STDC] & ~2) | ((byte & 1) << 1);
- saa_write_reg (SAA7196_STDC, saa_regs[pb->win.norm][SAA7196_STDC]);
- /* Let's wait 30msec for this one */
- current->state = TASK_INTERRUPTIBLE;
- schedule_timeout(30 * HZ / 1000);
- return (unsigned char)in_8 (&planb_regs->saa_status);
- }
- static void saa_set(unsigned char addr, unsigned char val, struct planb *pb)
- {
- if(saa_regs[pb->win.norm][addr] != val) {
- saa_regs[pb->win.norm][addr] = val;
- saa_write_reg (addr, val);
- }
- return;
- }
- static void saa_init_regs(struct planb *pb)
- {
- int i;
- for (i = 0; i < SAA7196_NUMREGS; i++)
- saa_write_reg (i, saa_regs[pb->win.norm][i]);
- }
- static void saa_geo_setup(int width, int height, int interlace,
- int fmt, struct planb *pb)
- {
- int ht, norm = pb->win.norm;
- /* bits FS0, FS1 according to format spec */
- saa_regs[norm][SAA7196_FMTS] &= ~0x3;
- saa_regs[norm][SAA7196_FMTS] |= (palette2fmt[fmt].saa_fmt & 0x3);
- ht = (interlace ? height / 2 : height);
- saa_regs[norm][SAA7196_OUTPIX] = (unsigned char) (width & 0x00ff);
- saa_regs[norm][SAA7196_HFILT] = (saa_regs[norm][SAA7196_HFILT] & ~0x3)
- | (width >> 8 & 0x3);
- saa_regs[norm][SAA7196_OUTLINE] = (unsigned char) (ht & 0xff);
- saa_regs[norm][SAA7196_VYP] = (saa_regs[norm][SAA7196_VYP] & ~0x3)
- | (ht >> 8 & 0x3);
- /* feed both fields if interlaced, or else feed only even fields */
- saa_regs[norm][SAA7196_FMTS] = (interlace) ?
- (saa_regs[norm][SAA7196_FMTS] & ~0x60)
- : (saa_regs[norm][SAA7196_FMTS] | 0x60);
- /* transparent mode; extended format enabled */
- saa_regs[norm][SAA7196_DPATH] |= 0x3;
- /* bits LLV, MCT according to format spec */
- saa_regs[norm][SAA7196_DPATH] &= ~0x30;
- saa_regs[norm][SAA7196_DPATH] |= (palette2fmt[fmt].saa_fmt & 0x30);
- }
- /***************************/
- /* DBDMA support functions */
- /***************************/
- static inline void planb_dbdma_restart(dbdma_regs_ptr ch)
- {
- writel(PLANB_CLR(RUN), &ch->control);
- writel(PLANB_SET(RUN|WAKE) | PLANB_CLR(PAUSE), &ch->control);
- }
- static inline void planb_dbdma_stop(dbdma_regs_ptr ch)
- {
- int i = 0;
- writel(PLANB_CLR(RUN) | PLANB_SET(FLUSH), &ch->control);
- while((readl(&ch->status) == (ACTIVE | FLUSH)) && (i < 999)) {
- IDBG("PlanB: waiting for DMA to stopn");
- i++;
- }
- }
- static inline void tab_cmd_dbdma(dbdma_cmd_ptr ch, unsigned short command,
- unsigned int cmd_dep)
- {
- st_le16(&ch->command, command);
- st_le16(&ch->req_count, 0);
- st_le32(&ch->phy_addr, 0);
- st_le32(&ch->cmd_dep, cmd_dep);
- /* really clears res_count & xfer_status */
- st_le32((unsigned int *)&ch->res_count, 0);
- }
- static inline void tab_cmd_store(dbdma_cmd_ptr ch, unsigned int phy_addr,
- unsigned int cmd_dep)
- {
- st_le16(&ch->command, STORE_WORD | KEY_SYSTEM);
- st_le16(&ch->req_count, 4);
- st_le32(&ch->phy_addr, phy_addr);
- st_le32(&ch->cmd_dep, cmd_dep);
- st_le32((unsigned int *)&ch->res_count, 0);
- }
- static inline void tab_cmd_gen(dbdma_cmd_ptr ch, unsigned short command,
- unsigned short req_count, unsigned int phy_addr, unsigned int cmd_dep)
- {
- st_le16(&ch->command, command);
- st_le16(&ch->req_count, req_count);
- st_le32(&ch->phy_addr, phy_addr);
- st_le32(&ch->cmd_dep, cmd_dep);
- st_le32((unsigned int *)&ch->res_count, 0);
- }
- static dbdma_cmd_ptr cmd_geo_setup(dbdma_cmd_ptr c1, int width, int height,
- int interlace, int fmt, int clip, struct planb *pb)
- {
- int norm = pb->win.norm;
- saa_geo_setup(width, height, interlace, fmt, pb);
- /* if the number of DBDMA commands here (14) changes, lots of
- * things need to be corrected accordingly... */
- tab_cmd_store(c1++, (unsigned)(&pb->planb_base_bus->saa_addr),
- SAA7196_FMTS);
- tab_cmd_store(c1++, (unsigned)(&pb->planb_base_bus->saa_regval),
- saa_regs[norm][SAA7196_FMTS]);
- tab_cmd_store(c1++, (unsigned)(&pb->planb_base_bus->saa_addr),
- SAA7196_DPATH);
- tab_cmd_store(c1++, (unsigned)(&pb->planb_base_bus->saa_regval),
- saa_regs[norm][SAA7196_DPATH]);
- tab_cmd_store(c1++, (unsigned)(&pb->planb_base_bus->even),
- palette2fmt[fmt].pb_fmt | ((clip)? PLANB_CLIPMASK: 0));
- tab_cmd_store(c1++, (unsigned)(&pb->planb_base_bus->odd),
- palette2fmt[fmt].pb_fmt | ((clip)? PLANB_CLIPMASK: 0));
- tab_cmd_store(c1++, (unsigned)(&pb->planb_base_bus->saa_addr),
- SAA7196_OUTPIX);
- tab_cmd_store(c1++, (unsigned)(&pb->planb_base_bus->saa_regval),
- saa_regs[norm][SAA7196_OUTPIX]);
- tab_cmd_store(c1++, (unsigned)(&pb->planb_base_bus->saa_addr),
- SAA7196_HFILT);
- tab_cmd_store(c1++, (unsigned)(&pb->planb_base_bus->saa_regval),
- saa_regs[norm][SAA7196_HFILT]);
- tab_cmd_store(c1++, (unsigned)(&pb->planb_base_bus->saa_addr),
- SAA7196_OUTLINE);
- tab_cmd_store(c1++, (unsigned)(&pb->planb_base_bus->saa_regval),
- saa_regs[norm][SAA7196_OUTLINE]);
- tab_cmd_store(c1++, (unsigned)(&pb->planb_base_bus->saa_addr),
- SAA7196_VYP);
- tab_cmd_store(c1++, (unsigned)(&pb->planb_base_bus->saa_regval),
- saa_regs[norm][SAA7196_VYP]);
- return c1;
- }
- /******************************/
- /* misc. supporting functions */
- /******************************/
- static inline void planb_lock(struct planb *pb)
- {
- DBG("PlanB: planb_lockn");
- down(&pb->lock);
- }
- static inline void planb_unlock(struct planb *pb)
- {
- DBG("PlanB: planb_unlockn");
- up(&pb->lock);
- }
- /***************/
- /* Driver Core */
- /***************/
- /* number of entries in the circular DBDMA command buffer
- * initial stop, odd/even vbi, odd/even video, branch back */
- #define NUMJUMPS 6
- static int planb_prepare_open(struct planb *pb)
- {
- dbdma_cmd_ptr c;
- int size, i;
- size = (NUMJUMPS + 1) * sizeof(struct dbdma_cmd);
- if((pb->jump_raw = kmalloc (size, GFP_KERNEL|GFP_DMA)) == 0)
- return -ENOMEM;
- memset(pb->jump_raw, 0, size);
- c = pb->jumpbuf = (dbdma_cmd_ptr) DBDMA_ALIGN (pb->jump_raw);
- /* circular DBDMA command buffer, to hold jumps to transfer commands */
- tab_cmd_dbdma(c++, DBDMA_STOP, 0);
- for (i=1; i<NUMJUMPS-1; i++)
- tab_cmd_dbdma(c++, DBDMA_NOP, 0);
- tab_cmd_dbdma(c, DBDMA_NOP|BR_ALWAYS,
- (unsigned int)pb->jumpbuf);
- DBG("PlanB: planb_prepare_open, jumpbuffer at 0x%08x, length %d.n",
- (unsigned int)pb->jumpbuf, size);
- return 0;
- }
- #define VBIDUMMY 40 /* must be even !! */
- static int planb_prepare_vbi(struct planb *pb)
- {
- int size;
- /* allocate VBI comand buffer memory
- (2 fields * VBI_MAXLINES + 40 handling + alignment) */
- size = (2*VBI_MAXLINES + VBIDUMMY + 1) * sizeof(struct dbdma_cmd);
- if ((pb->vbi_raw = kmalloc (size, GFP_KERNEL|GFP_DMA)) == 0)
- return -ENOMEM;
- memset (pb->vbi_raw, 0, size);
- size = (VBI_MAXLINES + VBIDUMMY/2) * sizeof(struct dbdma_cmd);
- pb->vbi_cbo.start = (dbdma_cmd_ptr) DBDMA_ALIGN (pb->vbi_raw);
- pb->vbi_cbo.size = pb->vbi_cbe.size = size;
- pb->vbi_cbe.start = pb->vbi_cbo.start + pb->vbi_cbo.size;
- pb->vbi_cbo.jumpaddr = pb->jumpbuf + 1;
- pb->vbi_cbe.jumpaddr = pb->jumpbuf + 3;
- DBG("PlanB: planb_prepare_vbi, dbdma cmd_buf at 0x%08x, length %d.n",
- (unsigned int)pb->vbi_cbo.start, 2*size);
- return 0;
- }
- static int planb_prepare_video(struct planb *pb)
- {
- int i, size;
- /* FIXME: This is stressing kmalloc to its limits...
- We really should allocate smaller chunks. */
- /* allocate memory for two plus alpha command buffers (size: max lines,
- plus 40 commands handling, plus 1 alignment), plus dummy command buf,
- plus clipmask buffer, plus frame grabbing status */
- size = (pb->tab_size * (2 + MAX_GBUFFERS * TAB_FACTOR)
- + MAX_GBUFFERS * PLANB_DUMMY + 1) * sizeof(struct dbdma_cmd)
- + (PLANB_MAXLINES * ((PLANB_MAXPIXELS + 7) & ~7)) / 8
- + MAX_GBUFFERS * sizeof(unsigned int);
- if ((pb->vid_raw = kmalloc (size, GFP_KERNEL|GFP_DMA)) == 0)
- return -ENOMEM;
- memset (pb->vid_raw, 0, size);
- pb->vid_cbo.start = (dbdma_cmd_ptr) DBDMA_ALIGN (pb->vid_raw);
- pb->vid_cbo.size = pb->vid_cbe.size = pb->tab_size/2;
- pb->vid_cbe.start = pb->vid_cbo.start + pb->vid_cbo.size;
- pb->vid_cbo.jumpaddr = pb->jumpbuf + 2;
- pb->vid_cbe.jumpaddr = pb->jumpbuf + 4;
- pb->overlay_last1 = pb->vid_cbo.start;
- pb->vid_cbo.bus = virt_to_bus(pb->vid_cbo.start);
- pb->vid_cbe.bus = virt_to_bus(pb->vid_cbe.start);
- pb->clip_cbo.start = pb->vid_cbe.start + pb->vid_cbe.size;
- pb->clip_cbo.size = pb->clip_cbe.size = pb->tab_size/2;
- pb->clip_cbe.start = pb->clip_cbo.start + pb->clip_cbo.size;
- pb->overlay_last2 = pb->clip_cbo.start;
- pb->clip_cbo.bus = virt_to_bus(pb->clip_cbo.start);
- pb->clip_cbe.bus = virt_to_bus(pb->clip_cbe.start);
- pb->gbuf[0].cap_cmd = pb->clip_cbe.start + pb->clip_cbe.size;
- pb->gbuf[0].pre_cmd = pb->gbuf[0].cap_cmd + pb->tab_size * TAB_FACTOR;
- for (i = 1; i < MAX_GBUFFERS; i++) {
- pb->gbuf[i].cap_cmd = pb->gbuf[i-1].pre_cmd + PLANB_DUMMY;
- pb->gbuf[i].pre_cmd = pb->gbuf[i].cap_cmd +
- pb->tab_size * TAB_FACTOR;
- }
- pb->gbuf[0].status = (volatile unsigned int *)
- (pb->gbuf[MAX_GBUFFERS-1].pre_cmd + PLANB_DUMMY);
- for (i = 1; i < MAX_GBUFFERS; i++)
- pb->gbuf[i].status = pb->gbuf[i-1].status;
- pb->mask = (unsigned char *)(pb->gbuf[MAX_GBUFFERS-1].status + 1);
- pb->rawbuf = NULL;
- pb->rawbuf_nchunks = 0;
- pb->grabbing = 0;
- for (i = 0; i < MAX_GBUFFERS; i++) {
- gbuf_ptr gbuf = &pb->gbuf[i];
- *gbuf->status = GBUFFER_UNUSED;
- gbuf->width = 0;
- gbuf->height = 0;
- gbuf->fmt = 0;
- gbuf->norm_switch = 0;
- #ifndef PLANB_GSCANLINE
- gbuf->lsize = 0;
- gbuf->lnum = 0;
- #endif
- }
- pb->gcount = 0;
- pb->suspend = 0;
- pb->last_fr = -999;
- pb->prev_last_fr = -999;
- /* Reset DMA controllers */
- planb_dbdma_stop(&pb->planb_base->ch2);
- planb_dbdma_stop(&pb->planb_base->ch1);
- DBG("PlanB: planb_prepare_video, dbdma cmd_buf at 0x%08x, "
- "length %d.n", (unsigned int)pb->vid_cbo.start, 2*size);
- return 0;
- }
- static void planb_prepare_close(struct planb *pb)
- {
- /* make sure the dma's are idle */
- planb_dbdma_stop(&pb->planb_base->ch2);
- planb_dbdma_stop(&pb->planb_base->ch1);
- if(pb->jump_raw != 0) {
- kfree(pb->jump_raw);
- pb->jump_raw = 0;
- }
- return;
- }
- static void planb_close_vbi(struct planb *pb)
- {
- /* FIXME: stop running DMA */
- /* Make sure the DMA controller doesn't jump here anymore */
- tab_cmd_dbdma(pb->vbi_cbo.jumpaddr, DBDMA_NOP, 0);
- tab_cmd_dbdma(pb->vbi_cbe.jumpaddr, DBDMA_NOP, 0);
- if(pb->vbi_raw != 0) {
- kfree (pb->vbi_raw);
- pb->vbi_raw = 0;
- }
- /* FIXME: deallocate VBI data buffer */
- /* FIXME: restart running DMA if app. */
- return;
- }
- static void planb_close_video(struct planb *pb)
- {
- int i;
- /* FIXME: stop running DMA */
- /* Make sure the DMA controller doesn't jump here anymore */
- tab_cmd_dbdma(pb->vid_cbo.jumpaddr, DBDMA_NOP, 0);
- tab_cmd_dbdma(pb->vid_cbe.jumpaddr, DBDMA_NOP, 0);
- /* No clipmask jumpbuffer yet */
- #if 0
- tab_cmd_dbdma(pb->clip_cbo.jumpaddr, DBDMA_NOP, 0);
- tab_cmd_dbdma(pb->clip_cbe.jumpaddr, DBDMA_NOP, 0);
- #endif
- if(pb->vid_raw != 0) {
- kfree (pb->vid_raw);
- pb->vid_raw = 0;
- pb->cmd_buff_inited = 0;
- }
- if(pb->rawbuf) {
- for (i = 0; i < pb->rawbuf_nchunks; i++) {
- mem_map_unreserve(virt_to_page(pb->rawbuf[i]));
- free_pages((unsigned long)pb->rawbuf[i], 0);
- }
- kfree(pb->rawbuf);
- }
- pb->rawbuf = NULL;
- /* FIXME: restart running DMA if app. */
- return;
- }
- /*****************************/
- /* overlay support functions */
- /*****************************/
- static void overlay_start(struct planb *pb)
- {
- DBG("PlanB: overlay_start()n");
- if(ACTIVE & readl(&pb->planb_base->ch1.status)) {
- DBG("PlanB: presumably, grabbing is in progress...n");
- planb_dbdma_stop(&pb->planb_base->ch2);
- writel(pb->clip_cbo.bus, &pb->planb_base->ch2.cmdptr);
- planb_dbdma_restart(&pb->planb_base->ch2);
- st_le16 (&pb->vid_cbo.start->command, DBDMA_NOP);
- tab_cmd_dbdma(pb->gbuf[pb->last_fr].last_cmd,
- DBDMA_NOP | BR_ALWAYS, pb->vid_cbo.bus);
- eieio();
- pb->prev_last_fr = pb->last_fr;
- pb->last_fr = -2;
- if(!(ACTIVE & readl(&pb->planb_base->ch1.status))) {
- IDBG("PlanB: became inactive "
- "in the mean time... reactivatingn");
- planb_dbdma_stop(&pb->planb_base->ch1);
- writel(pb->vid_cbo.bus, &pb->planb_base->ch1.cmdptr);
- planb_dbdma_restart(&pb->planb_base->ch1);
- }
- } else {
- DBG("PlanB: currently idle, so can do whatevern");
- planb_dbdma_stop(&pb->planb_base->ch2);
- planb_dbdma_stop(&pb->planb_base->ch1);
- st_le32(&pb->planb_base->ch2.cmdptr, pb->clip_cbo.bus);
- st_le32(&pb->planb_base->ch1.cmdptr, pb->vid_cbo.bus);
- writew(DBDMA_NOP, &pb->vid_cbo.start->command);
- planb_dbdma_restart(&pb->planb_base->ch2);
- planb_dbdma_restart(&pb->planb_base->ch1);
- pb->last_fr = -1;
- }
- return;
- }
- static void overlay_stop(struct planb *pb)
- {
- DBG("PlanB: overlay_stop()n");
- if(pb->last_fr == -1) {
- DBG("PlanB: no grabbing, it seems...n");
- planb_dbdma_stop(&pb->planb_base->ch2);
- planb_dbdma_stop(&pb->planb_base->ch1);
- pb->last_fr = -999;
- } else if(pb->last_fr == -2) {
- unsigned int cmd_dep;
- tab_cmd_dbdma(pb->gbuf[pb->prev_last_fr].cap_cmd, DBDMA_STOP, 0);
- eieio();
- cmd_dep = (unsigned int)readl(&pb->overlay_last1->cmd_dep);
- if(overlay_is_active(pb)) {
- DBG("PlanB: overlay is currently activen");
- planb_dbdma_stop(&pb->planb_base->ch2);
- planb_dbdma_stop(&pb->planb_base->ch1);
- if(cmd_dep != pb->vid_cbo.bus) {
- writel(virt_to_bus(pb->overlay_last1),
- &pb->planb_base->ch1.cmdptr);
- planb_dbdma_restart(&pb->planb_base->ch1);
- }
- }
- pb->last_fr = pb->prev_last_fr;
- pb->prev_last_fr = -999;
- }
- return;
- }
- static void suspend_overlay(struct planb *pb)
- {
- int fr = -1;
- struct dbdma_cmd last;
- DBG("PlanB: suspend_overlay: %dn", pb->suspend);
- if(pb->suspend++)
- return;
- if(ACTIVE & readl(&pb->planb_base->ch1.status)) {
- if(pb->last_fr == -2) {
- fr = pb->prev_last_fr;
- memcpy(&last, (void*)pb->gbuf[fr].last_cmd, sizeof(last));
- tab_cmd_dbdma(pb->gbuf[fr].last_cmd, DBDMA_STOP, 0);
- }
- if(overlay_is_active(pb)) {
- planb_dbdma_stop(&pb->planb_base->ch2);
- planb_dbdma_stop(&pb->planb_base->ch1);
- pb->suspended.overlay = 1;
- pb->suspended.frame = fr;
- memcpy(&pb->suspended.cmd, &last, sizeof(last));
- return;
- }
- }
- pb->suspended.overlay = 0;
- pb->suspended.frame = fr;
- memcpy(&pb->suspended.cmd, &last, sizeof(last));
- return;
- }
- static void resume_overlay(struct planb *pb)
- {
- DBG("PlanB: resume_overlay: %dn", pb->suspend);
- if(pb->suspend > 1)
- return;
- if(pb->suspended.frame != -1) {
- memcpy((void*)pb->gbuf[pb->suspended.frame].last_cmd,
- &pb->suspended.cmd, sizeof(pb->suspended.cmd));
- }
- if(ACTIVE & readl(&pb->planb_base->ch1.status)) {
- goto finish;
- }
- if(pb->suspended.overlay) {
- DBG("PlanB: overlay being resumedn");
- st_le16 (&pb->vid_cbo.start->command, DBDMA_NOP);
- st_le16 (&pb->clip_cbo.start->command, DBDMA_NOP);
- /* Set command buffer addresses */
- writel(virt_to_bus(pb->overlay_last1),
- &pb->planb_base->ch1.cmdptr);
- writel(virt_to_bus(pb->overlay_last2),
- &pb->planb_base->ch2.cmdptr);
- /* Start the DMA controller */
- writel(PLANB_CLR(PAUSE) | PLANB_SET(RUN|WAKE),
- &pb->planb_base->ch2.control);
- writel(PLANB_CLR(PAUSE) | PLANB_SET(RUN|WAKE),
- &pb->planb_base->ch1.control);
- } else if(pb->suspended.frame != -1) {
- writel(virt_to_bus(pb->gbuf[pb->suspended.frame].last_cmd),
- &pb->planb_base->ch1.cmdptr);
- writel(PLANB_CLR(PAUSE) | PLANB_SET(RUN|WAKE),
- &pb->planb_base->ch1.control);
- }
- finish:
- pb->suspend--;
- wake_up_interruptible(&pb->suspendq);
- }
- static void add_clip(struct planb *pb, struct video_clip *clip)
- {
- volatile unsigned char *base;
- int xc = clip->x, yc = clip->y;
- int wc = clip->width, hc = clip->height;
- int ww = pb->win.width, hw = pb->win.height;
- int x, y, xtmp1, xtmp2;
- DBG("PlanB: clip %dx%d+%d+%dn", wc, hc, xc, yc);
- if(xc < 0) {
- wc += xc;
- xc = 0;
- }
- if(yc < 0) {
- hc += yc;
- yc = 0;
- }
- if(xc + wc > ww)
- wc = ww - xc;
- if(wc <= 0) /* Nothing to do */
- return;
- if(yc + hc > hw)
- hc = hw - yc;
- for (y = yc; y < yc+hc; y++) {
- xtmp1=xc>>3;
- xtmp2=(xc+wc)>>3;
- base = pb->mask + y*96;
- if(xc != 0 || wc >= 8)
- *(base + xtmp1) &= (unsigned char)(0x00ff &
- (0xff00 >> (xc&7)));
- for (x = xtmp1 + 1; x < xtmp2; x++) {
- *(base + x) = 0;
- }
- if(xc < (ww & ~0x7))
- *(base + xtmp2) &= (unsigned char)(0x00ff >>
- ((xc+wc) & 7));
- }
- return;
- }
- static void fill_cmd_buff(struct planb *pb)
- {
- int restore = 0;
- dbdma_cmd_t last;
- DBG("PlanB: fill_cmd_buff()n");
- if(pb->overlay_last1 != pb->vid_cbo.start) {
- restore = 1;
- last = *(pb->overlay_last1);
- }
- memset ((void *) pb->vid_cbo.start, 0, 2 * pb->tab_size
- * sizeof(struct dbdma_cmd));
- cmd_buff (pb);
- if(restore)
- *(pb->overlay_last1) = last;
- if(pb->suspended.overlay) {
- unsigned long jump_addr = readl(&pb->overlay_last1->cmd_dep);
- if(jump_addr != pb->vid_cbo.bus) {
- int i;
- DBG("PlanB: adjusting ch1's jump addressn");
- for(i = 0; i < MAX_GBUFFERS; i++) {
- if(pb->gbuf[i].need_pre_capture) {
- if(jump_addr == virt_to_bus(pb->gbuf[i].pre_cmd))
- goto found;
- } else {
- if(jump_addr ==
- virt_to_bus(pb->gbuf[i].cap_cmd))
- goto found;
- }
- }
- DBG(" not found!n");
- goto out;
- found:
- if(pb->gbuf[i].need_pre_capture)
- writel(virt_to_bus(pb->overlay_last1),
- &pb->gbuf[i].pre_cmd->phy_addr);
- else
- writel(virt_to_bus(pb->overlay_last1),
- &pb->gbuf[i].cap_cmd->phy_addr);
- }
- }
- out:
- pb->cmd_buff_inited = 1;
- return;
- }
- static void cmd_buff(struct planb *pb)
- {
- int i, bpp, count, nlines, stepsize, interlace;
- unsigned long base, jump, addr_com, addr_dep;
- dbdma_cmd_ptr c1 = pb->vid_cbo.start;
- dbdma_cmd_ptr c2 = pb->clip_cbo.start;
- interlace = pb->win.interlace;
- bpp = pb->win.bpp;
- count = (bpp * ((pb->win.x + pb->win.width > pb->win.swidth) ?
- (pb->win.swidth - pb->win.x) : pb->win.width));
- nlines = ((pb->win.y + pb->win.height > pb->win.sheight) ?
- (pb->win.sheight - pb->win.y) : pb->win.height);
- /* Do video in: */
- /* Preamble commands: */
- addr_com = virt_to_bus(c1);
- addr_dep = virt_to_bus(&c1->cmd_dep);
- tab_cmd_dbdma(c1++, DBDMA_NOP, 0);
- jump = virt_to_bus(c1+16); /* 14 by cmd_geo_setup() and 2 for padding */
- c1 = cmd_geo_setup(c1, pb->win.width, pb->win.height, interlace,
- pb->win.color_fmt, 1, pb);
- tab_cmd_store(c1++, addr_com, (unsigned)(DBDMA_NOP | BR_ALWAYS) << 16);
- tab_cmd_store(c1++, addr_dep, jump);
- tab_cmd_store(c1++, (unsigned)(&pb->planb_base_bus->ch1.wait_sel),
- PLANB_SET(FIELD_SYNC));
- /* (1) wait for field sync to be set */
- tab_cmd_dbdma(c1++, DBDMA_NOP | WAIT_IFCLR, 0);
- tab_cmd_store(c1++, (unsigned)(&pb->planb_base_bus->ch1.br_sel),
- PLANB_SET(ODD_FIELD));
- /* wait for field sync to be cleared */
- tab_cmd_dbdma(c1++, DBDMA_NOP | WAIT_IFSET, 0);
- /* if not odd field, wait until field sync is set again */
- tab_cmd_dbdma(c1, DBDMA_NOP | BR_IFSET, virt_to_bus(c1-3)); c1++;
- /* assert ch_sync to ch2 */
- tab_cmd_store(c1++, (unsigned)(&pb->planb_base_bus->ch2.control),
- PLANB_SET(CH_SYNC));
- tab_cmd_store(c1++, (unsigned)(&pb->planb_base_bus->ch1.br_sel),
- PLANB_SET(DMA_ABORT));
- base = (pb->fb.phys + pb->fb.offset + pb->win.y * (pb->win.bpl +
- pb->win.pad) + pb->win.x * bpp);
- if (interlace) {
- stepsize = 2;
- jump = virt_to_bus(c1 + (nlines + 1) / 2);
- } else {
- stepsize = 1;
- jump = virt_to_bus(c1 + nlines);
- }
- /* even field data: */
- for (i=0; i < nlines; i += stepsize, c1++)
- tab_cmd_gen(c1, INPUT_MORE | KEY_STREAM0 | BR_IFSET,
- count, base + i * (pb->win.bpl + pb->win.pad), jump);
- /* For non-interlaced, we use even fields only */
- if (!interlace)
- goto cmd_tab_data_end;
- /* Resync to odd field */
- /* (2) wait for field sync to be set */
- tab_cmd_dbdma(c1++, DBDMA_NOP | WAIT_IFCLR, 0);
- tab_cmd_store(c1++, (unsigned)(&pb->planb_base_bus->ch1.br_sel),
- PLANB_SET(ODD_FIELD));
- /* wait for field sync to be cleared */
- tab_cmd_dbdma(c1++, DBDMA_NOP | WAIT_IFSET, 0);
- /* if not odd field, wait until field sync is set again */
- tab_cmd_dbdma(c1, DBDMA_NOP | BR_IFCLR, virt_to_bus(c1-3)); c1++;
- /* assert ch_sync to ch2 */
- tab_cmd_store(c1++, (unsigned)(&pb->planb_base_bus->ch2.control),
- PLANB_SET(CH_SYNC));
- tab_cmd_store(c1++, (unsigned)(&pb->planb_base_bus->ch1.br_sel),
- PLANB_SET(DMA_ABORT));
-
- /* odd field data: */
- jump = virt_to_bus(c1 + nlines / 2);
- for (i=1; i < nlines; i += stepsize, c1++)
- tab_cmd_gen(c1, INPUT_MORE | KEY_STREAM0 | BR_IFSET, count,
- base + i * (pb->win.bpl + pb->win.pad), jump);
- /* And jump back to the start */
- cmd_tab_data_end:
- pb->overlay_last1 = c1; /* keep a pointer to the last command */
- tab_cmd_dbdma(c1, DBDMA_NOP | BR_ALWAYS, pb->vid_cbo.bus);
- /* Clipmask command buffer */
- /* Preamble commands: */
- tab_cmd_dbdma(c2++, DBDMA_NOP, 0);
- tab_cmd_store(c2++, (unsigned)(&pb->planb_base_bus->ch2.wait_sel),
- PLANB_SET(CH_SYNC));
- /* wait until ch1 asserts ch_sync */
- tab_cmd_dbdma(c2++, DBDMA_NOP | WAIT_IFCLR, 0);
- /* clear ch_sync asserted by ch1 */
- tab_cmd_store(c2++, (unsigned)(&pb->planb_base_bus->ch2.control),
- PLANB_CLR(CH_SYNC));
- tab_cmd_store(c2++, (unsigned)(&pb->planb_base_bus->ch2.wait_sel),
- PLANB_SET(FIELD_SYNC));
- tab_cmd_store(c2++, (unsigned)(&pb->planb_base_bus->ch2.br_sel),
- PLANB_SET(ODD_FIELD));
- /* jump to end of even field if appropriate */
- /* this points to (interlace)? pos. C: pos. B */
- jump = (interlace) ? virt_to_bus(c2 + (nlines + 1) / 2 + 2):
- virt_to_bus(c2 + nlines + 2);
- /* if odd field, skip over to odd field clipmasking */
- tab_cmd_dbdma(c2++, DBDMA_NOP | BR_IFSET, jump);
- /* even field mask: */
- tab_cmd_store(c2++, (unsigned)(&pb->planb_base_bus->ch2.br_sel),
- PLANB_SET(DMA_ABORT));
- /* this points to pos. B */
- jump = (interlace) ? virt_to_bus(c2 + nlines + 1):
- virt_to_bus(c2 + nlines);
- base = virt_to_bus(pb->mask);
- for (i=0; i < nlines; i += stepsize, c2++)
- tab_cmd_gen(c2, OUTPUT_MORE | KEY_STREAM0 | BR_IFSET, 96,
- base + i * 96, jump);
- /* For non-interlaced, we use only even fields */
- if(!interlace)
- goto cmd_tab_mask_end;
- /* odd field mask: */
- /* C */ tab_cmd_store(c2++, (unsigned)(&pb->planb_base_bus->ch2.br_sel),
- PLANB_SET(DMA_ABORT));
- /* this points to pos. B */
- jump = virt_to_bus(c2 + nlines / 2);
- base = virt_to_bus(pb->mask);
- for (i=1; i < nlines; i += 2, c2++) /* abort if set */
- tab_cmd_gen(c2, OUTPUT_MORE | KEY_STREAM0 | BR_IFSET, 96,
- base + i * 96, jump);
- /* Inform channel 1 and jump back to start */
- cmd_tab_mask_end:
- /* ok, I just realized this is kind of flawed. */
- /* this part is reached only after odd field clipmasking. */
- /* wanna clean up? */
- /* wait for field sync to be set */
- /* corresponds to fsync (1) of ch1 */
- /* B */ tab_cmd_dbdma(c2++, DBDMA_NOP | WAIT_IFCLR, 0);
- /* restart ch1, meant to clear any dead bit or something */
- tab_cmd_store(c2++, (unsigned)(&pb->planb_base_bus->ch1.control),
- PLANB_CLR(RUN));
- tab_cmd_store(c2++, (unsigned)(&pb->planb_base_bus->ch1.control),
- PLANB_SET(RUN));
- pb->overlay_last2 = c2; /* keep a pointer to the last command */
- /* start over even field clipmasking */
- tab_cmd_dbdma(c2, DBDMA_NOP | BR_ALWAYS, pb->clip_cbo.bus);
- eieio();
- return;
- }
- /*********************************/
- /* grabdisplay support functions */
- /*********************************/
- static inline int overlay_is_active(struct planb *pb)
- {
- unsigned int size = pb->tab_size * sizeof(struct dbdma_cmd);
- unsigned int caddr = (unsigned)readl(&pb->planb_base->ch1.cmdptr);
- return (readl(&pb->overlay_last1->cmd_dep) == pb->vid_cbo.bus)
- && (caddr < (pb->vid_cbo.bus + size))
- && (caddr >= (unsigned)pb->vid_cbo.bus);
- }
- static int vgrab(struct planb *pb, struct video_mmap *mp)
- {
- unsigned int fr = mp->frame;
- unsigned int fmt = mp->format;
- unsigned int bpp = palette2fmt[fmt].bpp;
- gbuf_ptr gbuf = &pb->gbuf[fr];
- if(pb->rawbuf==NULL) {
- int err;
- if((err=grabbuf_alloc(pb)))
- return err;
- }
- DBG("PlanB: grab %d: %dx%d fmt %d (%u)n", pb->grabbing, mp->width,
- mp->height, fmt, fr);
- if(pb->grabbing >= MAX_GBUFFERS) {
- DBG(" no buffern");
- return -ENOBUFS;
- }
- if(fr > (MAX_GBUFFERS - 1) || fr < 0) {
- DBG(" invalid buffern");
- return -EINVAL;
- }
- if(mp->height <= 0 || mp->width <= 0) {
- DBG(" negative height or widthn");
- return -EINVAL;
- }
- if(mp->format < 0 || mp->format >= PLANB_PALETTE_MAX) {
- DBG(" format out of rangen");
- return -EINVAL;
- }
- if(bpp == 0) {
- DBG(" unsupported format %dn", mp->format);
- return -EINVAL;
- }
- if (mp->height * mp->width * bpp > PLANB_MAX_FBUF) {
- DBG(" grab bigger than buffern");
- return -EINVAL;
- }
- planb_lock(pb);
- if(mp->width != gbuf->width || mp->height != gbuf->height ||
- fmt != gbuf->fmt || (gbuf->norm_switch)) {
- int i;
- #ifndef PLANB_GSCANLINE
- unsigned int osize = gbuf->width * gbuf->height *
- palette2fmt[gbuf->fmt].bpp;
- unsigned int nsize = mp->width * mp->height * bpp;
- #endif
- DBG("PlanB: changed gwidth = %d, gheight = %d, format = %u, "
- "osize = %d, nsize = %dn", mp->width, mp->height, fmt,
- osize, nsize);
- /* Do we _really_ need to clear the grab buffers?? */
- #if 0
- #ifndef PLANB_GSCANLINE
- if(gbuf->norm_switch)
- nsize = 0;
- if (nsize < osize) {
- for(i = gbuf->idx; osize > 0; i++) {
- memset((void *)pb->rawbuf[i], 0, PAGE_SIZE);
- osize -= PAGE_SIZE;
- }
- }
- for(i = gbuf->l_fr_addr_idx; i <
- gbuf->l_fr_addr_idx + gbuf->lnum; i++)
- memset((void *)pb->rawbuf[i], 0, PAGE_SIZE);
- #else
- /* XXX TODO */
- /*
- if(gbuf->norm_switch)
- memset((void *)pb->gbuffer[fr], 0,
- pb->gbytes_per_line * gbuf->height);
- else {
- if(mp->
- for(i = 0; i < gbuf->height; i++) {
- memset((void *)(pb->gbuffer[fr]
- + pb->gbytes_per_line * i
- }
- }
- */
- #endif
- #endif /* if 0 */
- gbuf->width = mp->width;
- gbuf->height = mp->height;
- gbuf->fmt = fmt;
- gbuf->last_cmd = setup_grab_cmd(fr, pb);
- planb_pre_capture(fr, pb);
- gbuf->need_pre_capture = 1;
- gbuf->norm_switch = 0;
- } else
- gbuf->need_pre_capture = 0;
- *gbuf->status = GBUFFER_GRABBING;
- if(!(ACTIVE & readl(&pb->planb_base->ch1.status))) {
- IDBG("PlanB: ch1 inactive, initiating grabbingn");
- planb_dbdma_stop(&pb->planb_base->ch1);
- if(gbuf->need_pre_capture) {
- DBG("PlanB: padding pre-capture sequencen");
- writel(virt_to_bus(gbuf->pre_cmd),
- &pb->planb_base->ch1.cmdptr);
- } else {
- tab_cmd_dbdma(gbuf->last_cmd, DBDMA_STOP, 0);
- tab_cmd_dbdma(gbuf->cap_cmd, DBDMA_NOP, 0);
- /* let's be on the safe side. here is not timing critical. */
- tab_cmd_dbdma((gbuf->cap_cmd + 1), DBDMA_NOP, 0);
- writel(virt_to_bus(gbuf->cap_cmd),
- &pb->planb_base->ch1.cmdptr);
- }
- planb_dbdma_restart(&pb->planb_base->ch1);
- pb->last_fr = fr;
- } else {
- int i;
- DBG("PlanB: ch1 active, grabbing being queuedn");
- if((pb->last_fr == -1) || ((pb->last_fr == -2) &&
- overlay_is_active(pb))) {
- DBG("PlanB: overlay is active, grabbing deferedn");
- tab_cmd_dbdma(gbuf->last_cmd, DBDMA_NOP | BR_ALWAYS,
- pb->vid_cbo.bus);
- if(gbuf->need_pre_capture) {
- DBG("PlanB: padding pre-capture sequencen");
- tab_cmd_store(gbuf->pre_cmd,
- virt_to_bus(&pb->overlay_last1->cmd_dep),
- pb->vid_cbo.bus);
- eieio();
- writel(virt_to_bus(gbuf->pre_cmd),
- &pb->overlay_last1->cmd_dep);
- } else {
- tab_cmd_store(gbuf->cap_cmd,
- virt_to_bus(&pb->overlay_last1->cmd_dep),
- pb->vid_cbo.bus);
- tab_cmd_dbdma((gbuf->cap_cmd + 1),
- DBDMA_NOP, 0);
- eieio();
- writel(virt_to_bus(gbuf->cap_cmd),
- &pb->overlay_last1->cmd_dep);
- }
- for(i = 0; overlay_is_active(pb) && i < 999; i++)
- DBG("PlanB: waiting for overlay donen");
- tab_cmd_dbdma(pb->vid_cbo.start, DBDMA_NOP, 0);
- pb->prev_last_fr = fr;
- pb->last_fr = -2;
- } else if(pb->last_fr == -2) {
- DBG("PlanB: mixed mode detected, grabbing"
- " will be done before activating overlayn");
- tab_cmd_dbdma(pb->vid_cbo.start, DBDMA_NOP, 0);
- if(gbuf->need_pre_capture) {
- DBG("PlanB: padding pre-capture sequencen");
- tab_cmd_dbdma(pb->gbuf[pb->prev_last_fr].last_cmd,
- DBDMA_NOP | BR_ALWAYS,
- virt_to_bus(gbuf->pre_cmd));
- eieio();
- } else {
- tab_cmd_dbdma(gbuf->cap_cmd, DBDMA_NOP, 0);
- if(pb->gbuf[pb->prev_last_fr].width !=
- gbuf->width
- || pb->gbuf[pb->prev_last_fr].height !=
- gbuf->height
- || pb->gbuf[pb->prev_last_fr].fmt !=
- gbuf->fmt)
- tab_cmd_dbdma((gbuf->cap_cmd + 1),
- DBDMA_NOP, 0);
- else
- tab_cmd_dbdma((gbuf->cap_cmd + 1),
- DBDMA_NOP | BR_ALWAYS,
- virt_to_bus(gbuf->cap_cmd + 16));
- tab_cmd_dbdma(pb->gbuf[pb->prev_last_fr].last_cmd,
- DBDMA_NOP | BR_ALWAYS,
- virt_to_bus(gbuf->cap_cmd));
- eieio();
- }
- tab_cmd_dbdma(gbuf->last_cmd, DBDMA_NOP | BR_ALWAYS,
- pb->vid_cbo.bus);
- eieio();
- pb->prev_last_fr = fr;
- pb->last_fr = -2;
- } else {
- gbuf_ptr lastgbuf = &pb->gbuf[pb->last_fr];
- DBG("PlanB: active grabbing session detectedn");
- if(gbuf->need_pre_capture) {
- DBG("PlanB: padding pre-capture sequencen");
- tab_cmd_dbdma(lastgbuf->last_cmd,
- DBDMA_NOP | BR_ALWAYS,
- virt_to_bus(gbuf->pre_cmd));
- eieio();
- } else {
- tab_cmd_dbdma(gbuf->last_cmd, DBDMA_STOP, 0);
- tab_cmd_dbdma(gbuf->cap_cmd, DBDMA_NOP, 0);
- if(lastgbuf->width != gbuf->width
- || lastgbuf->height != gbuf->height
- || lastgbuf->fmt != gbuf->fmt)
- tab_cmd_dbdma((gbuf->cap_cmd + 1),
- DBDMA_NOP, 0);
- else
- tab_cmd_dbdma((gbuf->cap_cmd + 1),
- DBDMA_NOP | BR_ALWAYS,
- virt_to_bus(gbuf->cap_cmd + 16));
- tab_cmd_dbdma(lastgbuf->last_cmd,
- DBDMA_NOP | BR_ALWAYS,
- virt_to_bus(gbuf->cap_cmd));
- eieio();
- }
- pb->last_fr = fr;
- }
- if(!(ACTIVE & readl(&pb->planb_base->ch1.status))) {
- DBG("PlanB: became inactive in the mean time... "
- "reactivatingn");
- planb_dbdma_stop(&pb->planb_base->ch1);
- writel(virt_to_bus(gbuf->cap_cmd),
- &pb->planb_base->ch1.cmdptr);
- planb_dbdma_restart(&pb->planb_base->ch1);
- }
- }
- pb->grabbing++;
- planb_unlock(pb);
- return 0;
- }
- static void planb_pre_capture(int fr, struct planb *pb)
- {
- gbuf_ptr gbuf = &pb->gbuf[fr];
- dbdma_cmd_ptr c1 = gbuf->pre_cmd;
- int height = gbuf->height;
- int interlace = (height > pb->maxlines/2)? 1: 0;
- tab_cmd_dbdma(c1++, DBDMA_NOP, 0);
- c1 = cmd_geo_setup(c1, gbuf->width, height, interlace, gbuf->fmt,
- 0, pb);
- /* Sync to even field */
- tab_cmd_store(c1++, (unsigned)(&pb->planb_base_bus->ch1.wait_sel),
- PLANB_SET(FIELD_SYNC));
- tab_cmd_dbdma(c1++, DBDMA_NOP | WAIT_IFCLR, 0);
- tab_cmd_store(c1++, (unsigned)(&pb->planb_base_bus->ch1.br_sel),
- PLANB_SET(ODD_FIELD));
- tab_cmd_dbdma(c1++, DBDMA_NOP | WAIT_IFSET, 0);
- tab_cmd_dbdma(c1, DBDMA_NOP | BR_IFSET, virt_to_bus(c1-3)); c1++;
- tab_cmd_dbdma(c1++, DBDMA_NOP | INTR_ALWAYS, 0);
- tab_cmd_store(c1++, (unsigned)(&pb->planb_base_bus->ch1.br_sel),
- PLANB_SET(DMA_ABORT));
- /* For non-interlaced, we use even fields only */
- if (interlace == 0)
- goto cmd_tab_data_end;
- /* Sync to odd field */
- tab_cmd_dbdma(c1++, DBDMA_NOP | WAIT_IFCLR, 0);
- tab_cmd_store(c1++, (unsigned)(&pb->planb_base_bus->ch1.br_sel),
- PLANB_SET(ODD_FIELD));
- tab_cmd_dbdma(c1++, DBDMA_NOP | WAIT_IFSET, 0);
- tab_cmd_dbdma(c1, DBDMA_NOP | BR_IFCLR, virt_to_bus(c1-3)); c1++;
- tab_cmd_store(c1++, (unsigned)(&pb->planb_base_bus->ch1.br_sel),
- PLANB_SET(DMA_ABORT));
- cmd_tab_data_end:
- tab_cmd_dbdma(c1, DBDMA_NOP | BR_ALWAYS, virt_to_bus(gbuf->cap_cmd));
- eieio();
- }
- /* This needs some explanation.
- * What we do here is write the DBDMA commands to fill the grab buffer.
- * Since the grab buffer is made up of physically non-contiguous chunks,
- * we need to make sure to not make the DMA engine write across a chunk
- * boundary: the DMA engine needs a physically contiguous memory chunk for
- * a single scan line.
- * So all those scan lines that cross a chunk boundary are written do spare
- * scratch buffers, and we keep track of this fact.
- * Later, in the interrupt routine, we copy those scan lines (in two pieces)
- * back to where they belong in the right sequence in the grab buffer.
- */
- static dbdma_cmd_ptr setup_grab_cmd(int fr, struct planb *pb)
- {
- int i, count, nlines, stepsize, interlace;
- #ifdef PLANB_GSCANLINE
- int scanline;
- #else
- int nlpp, leftover1;
- unsigned long base;
- #endif
- unsigned long jump;
- int pagei;
- dbdma_cmd_ptr c1;
- dbdma_cmd_ptr jump_addr;
- gbuf_ptr gbuf = &pb->gbuf[fr];
- int fmt = gbuf->fmt;
- c1 = gbuf->cap_cmd;
- nlines = gbuf->height;
- interlace = (nlines > pb->maxlines/2) ? 1 : 0;
- count = palette2fmt[fmt].bpp * gbuf->width;
- #ifdef PLANB_GSCANLINE
- scanline = pb->gbytes_per_line;
- #else
- gbuf->lsize = count;
- gbuf->lnum = 0;
- #endif
- /* Do video in: */
- /* Preamble commands: */
- tab_cmd_dbdma(c1++, DBDMA_NOP, 0);
- tab_cmd_dbdma(c1, DBDMA_NOP | BR_ALWAYS, virt_to_bus(c1 + 16)); c1++;
- c1 = cmd_geo_setup(c1, gbuf->width, nlines, interlace, fmt, 0, pb);
- tab_cmd_store(c1++, (unsigned)(&pb->planb_base_bus->ch1.wait_sel),
- PLANB_SET(FIELD_SYNC));
- tab_cmd_dbdma(c1++, DBDMA_NOP | WAIT_IFCLR, 0);
- tab_cmd_store(c1++, (unsigned)(&pb->planb_base_bus->ch1.br_sel),
- PLANB_SET(ODD_FIELD));
- tab_cmd_dbdma(c1++, DBDMA_NOP | WAIT_IFSET, 0);
- tab_cmd_dbdma(c1, DBDMA_NOP | BR_IFSET, virt_to_bus(c1-3)); c1++;
- tab_cmd_dbdma(c1++, DBDMA_NOP | INTR_ALWAYS, 0);
- tab_cmd_store(c1++, (unsigned)(&pb->planb_base_bus->ch1.br_sel),
- PLANB_SET(DMA_ABORT));
- if (interlace) {
- stepsize = 2;
- jump_addr = c1 + TAB_FACTOR * (nlines + 1) / 2;
- } else {
- stepsize = 1;
- jump_addr = c1 + TAB_FACTOR * nlines;
- }
- jump = virt_to_bus(jump_addr);
- /* even field data: */
- pagei = gbuf->idx;
- #ifdef PLANB_GSCANLINE
- for (i = 0; i < nlines; i += stepsize) {
- tab_cmd_gen(c1++, INPUT_MORE | KEY_STREAM0 | BR_IFSET, count,
- virt_to_bus(pb->rawbuf[pagei + i * scanline / PAGE_SIZE]),
- jump);
- }
- #else
- i = 0;
- leftover1 = 0;
- do {
- int j;
- base = virt_to_bus(pb->rawbuf[pagei]);
- nlpp = (PAGE_SIZE - leftover1) / count / stepsize;
- for(j = 0; j < nlpp && i < nlines; j++, i += stepsize, c1++)
- tab_cmd_gen(c1, INPUT_MORE | KEY_STREAM0 | BR_IFSET,
- count, base + count * j * stepsize + leftover1, jump);
- if(i < nlines) {
- int lov0 = PAGE_SIZE - count * nlpp * stepsize - leftover1;
- if(lov0 == 0)
- leftover1 = 0;
- else {
- if(lov0 >= count) {
- /* can happen only when interlacing; then other field
- * uses up leftover space (lov0 - count). */
- tab_cmd_gen(c1++, INPUT_MORE | BR_IFSET, count, base
- + count * nlpp * stepsize + leftover1, jump);
- } else {
- /* start of free space at end of page: */
- pb->l_to_addr[fr][gbuf->lnum] = pb->rawbuf[pagei]
- + count * nlpp * stepsize + leftover1;
- /* index where continuation is: */
- pb->l_to_next_idx[fr][gbuf->lnum] = pagei + 1;
- /* How much is left to do in next page: */
- pb->l_to_next_size[fr][gbuf->lnum] = count - lov0;
- tab_cmd_gen(c1++, INPUT_MORE | BR_IFSET, count,
- virt_to_bus(pb->rawbuf[gbuf->l_fr_addr_idx
- + gbuf->lnum]), jump);
- if(++gbuf->lnum > MAX_LNUM) {
- /* FIXME: error condition! */
- gbuf->lnum--;
- }
- }
- leftover1 = count * stepsize - lov0;
- i += stepsize;
- }
- }
- pagei++;
- } while(i < nlines);
- tab_cmd_dbdma(c1, DBDMA_NOP | BR_ALWAYS, jump);
- c1 = jump_addr;
- #endif /* PLANB_GSCANLINE */
- /* For non-interlaced, we use even fields only */
- if (!interlace)
- goto cmd_tab_data_end;
- /* Sync to odd field */
- tab_cmd_dbdma(c1++, DBDMA_NOP | WAIT_IFCLR, 0);
- tab_cmd_store(c1++, (unsigned)(&pb->planb_base_bus->ch1.br_sel),
- PLANB_SET(ODD_FIELD));
- tab_cmd_dbdma(c1++, DBDMA_NOP | WAIT_IFSET, 0);
- tab_cmd_dbdma(c1, DBDMA_NOP | BR_IFCLR, virt_to_bus(c1-3)); c1++;
- tab_cmd_store(c1++, (unsigned)(&pb->planb_base_bus->ch1.br_sel),
- PLANB_SET(DMA_ABORT));
-
- /* odd field data: */
- jump_addr = c1 + TAB_FACTOR * nlines / 2;
- jump = virt_to_bus(jump_addr);
- #ifdef PLANB_GSCANLINE
- for (i = 1; i < nlines; i += stepsize) {
- tab_cmd_gen(c1++, INPUT_MORE | KEY_STREAM0 | BR_IFSET, count,
- virt_to_bus(pb->rawbuf[pagei
- + i * scanline / PAGE_SIZE]), jump);
- }
- #else
- i = 1;
- leftover1 = 0;
- pagei = gbuf->idx;
- if(nlines <= 1)
- goto skip;
- do {
- int j;
- base = virt_to_bus(pb->rawbuf[pagei]);
- nlpp = (PAGE_SIZE - leftover1) / count / stepsize;
- if(leftover1 >= count) {
- tab_cmd_gen(c1++, INPUT_MORE | KEY_STREAM0 | BR_IFSET, count,
- base + leftover1 - count, jump);
- i += stepsize;
- }
- for(j = 0; j < nlpp && i < nlines; j++, i += stepsize, c1++)
- tab_cmd_gen(c1, INPUT_MORE | KEY_STREAM0 | BR_IFSET, count,
- base + count * (j * stepsize + 1) + leftover1, jump);
- if(i < nlines) {
- int lov0 = PAGE_SIZE - count * nlpp * stepsize - leftover1;
- if(lov0 == 0)
- leftover1 = 0;
- else {
- if(lov0 > count) {
- pb->l_to_addr[fr][gbuf->lnum] = pb->rawbuf[pagei]
- + count * (nlpp * stepsize + 1) + leftover1;
- pb->l_to_next_idx[fr][gbuf->lnum] = pagei + 1;
- pb->l_to_next_size[fr][gbuf->lnum] = count * stepsize
- - lov0;
- tab_cmd_gen(c1++, INPUT_MORE | BR_IFSET, count,
- virt_to_bus(pb->rawbuf[gbuf->l_fr_addr_idx
- + gbuf->lnum]), jump);
- if(++gbuf->lnum > MAX_LNUM) {
- /* FIXME: error condition! */
- gbuf->lnum--;
- }
- i += stepsize;
- }
- leftover1 = count * stepsize - lov0;
- }
- }
- pagei++;
- } while(i < nlines);
- skip:
- tab_cmd_dbdma(c1, DBDMA_NOP | BR_ALWAYS, jump);
- c1 = jump_addr;
- #endif /* PLANB_GSCANLINE */
- cmd_tab_data_end:
- tab_cmd_store(c1++, (unsigned)(&pb->planb_base_bus->intr_stat),
- (fr << 9) | PLANB_FRM_IRQ | PLANB_GEN_IRQ);
- /* stop it */
- tab_cmd_dbdma(c1, DBDMA_STOP, 0);
- eieio();
- return c1;
- }
- static void planb_irq(int irq, void *dev_id, struct pt_regs * regs)
- {
- unsigned int stat, astat;
- struct planb *pb = (struct planb *)dev_id;
- IDBG("PlanB: planb_irq()n");
- /* get/clear interrupt status bits */
- eieio();
- stat = readl(&pb->planb_base->intr_stat);
- astat = stat & pb->intr_mask;
- writel(PLANB_FRM_IRQ & ~astat & stat & ~PLANB_GEN_IRQ,
- &pb->planb_base->intr_stat);
- IDBG("PlanB: stat = %X, astat = %Xn", stat, astat);
- if(astat & PLANB_FRM_IRQ) {
- unsigned int fr = stat >> 9;
- gbuf_ptr gbuf = &pb->gbuf[fr];
- #ifndef PLANB_GSCANLINE
- int i;
- #endif
- IDBG("PlanB: PLANB_FRM_IRQn");
- pb->gcount++;
- IDBG("PlanB: grab %d: fr = %d, gcount = %dn",
- pb->grabbing, fr, pb->gcount);
- #ifndef PLANB_GSCANLINE
- /* Now that the buffer is full, copy those lines that fell
- * on a page boundary from the spare buffers back to where
- * they belong. */
- IDBG("PlanB: %d * %d bytes are being copied overn",
- gbuf->lnum, gbuf->lsize);
- for(i = 0; i < gbuf->lnum; i++) {
- int first = gbuf->lsize - pb->l_to_next_size[fr][i];
- memcpy(pb->l_to_addr[fr][i],
- pb->rawbuf[gbuf->l_fr_addr_idx + i],
- first);
- memcpy(pb->rawbuf[pb->l_to_next_idx[fr][i]],
- pb->rawbuf[gbuf->l_fr_addr_idx + i] + first,
- pb->l_to_next_size[fr][i]);
- }
- #endif
- *gbuf->status = GBUFFER_DONE;
- pb->grabbing--;
- wake_up_interruptible(&pb->capq);
- return;
- }
- /* incorrect interrupts? */
- pb->intr_mask = PLANB_CLR_IRQ;
- writel(PLANB_CLR_IRQ, &pb->planb_base->intr_stat);
- printk(KERN_ERR "PlanB: IRQ lockup, cleared interrupts"
- " unconditionallyn");
- }
- /*******************************
- * Device Operations functions *
- *******************************/
- static int planb_open(struct video_device *dev, int mode)
- {
- struct planb *pb = (struct planb *)dev->priv;
- int err;
- /* first open on driver? */
- if(pb->vid_user + pb->vbi_user == 0) {
- if((err = planb_prepare_open(pb)) != 0)
- return err;
- }
- /* first open on video dev? */
- if(pb->vid_user == 0) {
- if((err = planb_prepare_video(pb)) != 0)
- return err;
- }
- pb->vid_user++;
- DBG("PlanB: device openedn");
- MOD_INC_USE_COUNT;
- return 0;
- }
- static void planb_close(struct video_device *dev)
- {
- struct planb *pb = (struct planb *)dev->priv;
- planb_lock(pb);
- /* last close? then stop everything... */
- if(--pb->vid_user == 0) {
- if(pb->overlay) {
- planb_dbdma_stop(&pb->planb_base->ch2);
- planb_dbdma_stop(&pb->planb_base->ch1);
- pb->overlay = 0;
- }
- planb_close_video(pb);
- }
- /* last open on PlanB hardware? */
- if(pb->vid_user + pb->vbi_user == 0)
- planb_prepare_close(pb);
- planb_unlock(pb);
- DBG("PlanB: device closedn");
- MOD_DEC_USE_COUNT;
- return;
- }
- static long planb_read(struct video_device *v, char *buf, unsigned long count,
- int nonblock)
- {
- DBG("planb: read requestn");
- return -EINVAL;
- }
- static long planb_write(struct video_device *v, const char *buf,
- unsigned long count, int nonblock)
- {
- DBG("planb: write requestn");
- return -EINVAL;
- }
- static int planb_ioctl(struct video_device *dev, unsigned int cmd, void *arg)
- {
- struct planb *pb=(struct planb *)dev->priv;
-
- switch (cmd)
- {
- case VIDIOCGCAP:
- {
- struct video_capability b;
- DBG("PlanB: IOCTL VIDIOCGCAPn");
- strcpy (b.name, pb->video_dev.name);
- b.type = VID_TYPE_OVERLAY | VID_TYPE_CLIPPING |
- VID_TYPE_FRAMERAM | VID_TYPE_SCALES |
- VID_TYPE_CAPTURE;
- b.channels = 2; /* composite & svhs */
- b.audios = 0;
- b.maxwidth = PLANB_MAXPIXELS;
- b.maxheight = PLANB_MAXLINES;
- b.minwidth = 32; /* wild guess */
- b.minheight = 32;
- if (copy_to_user(arg,&b,sizeof(b)))
- return -EFAULT;
- return 0;
- }
- case VIDIOCSFBUF:
- {
- struct video_buffer v;
- unsigned int fmt;
- DBG("PlanB: IOCTL VIDIOCSFBUFn");
- if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO))
- return -EPERM;
- if (copy_from_user(&v, arg, sizeof(v)))
- return -EFAULT;
- planb_lock(pb);
- switch(v.depth) {
- /* xawtv only asks for 8 bit in static grey, but
- * there is no way to know what it really means.. */
- case 8:
- fmt = VIDEO_PALETTE_GREY;
- break;
- case 15:
- fmt = VIDEO_PALETTE_RGB555;
- break;
- case 32:
- fmt = VIDEO_PALETTE_RGB32;
- break;
- /* We don't deliver these two... */
- case 16:
- case 24:
- default:
- planb_unlock(pb);
- return -EINVAL;
- }
- if (palette2fmt[fmt].bpp * v.width > v.bytesperline) {
- planb_unlock(pb);
- return -EINVAL;
- }
- pb->win.bpp = palette2fmt[fmt].bpp;
- pb->win.color_fmt = fmt;
- pb->fb.phys = (unsigned long) v.base;
- pb->win.sheight = v.height;
- pb->win.swidth = v.width;
- pb->picture.depth = pb->win.depth = v.depth;
- pb->win.bpl = pb->win.bpp * pb->win.swidth;
- pb->win.pad = v.bytesperline - pb->win.bpl;
- DBG("PlanB: Display at %p is %d by %d, bytedepth %d,"
- " bpl %d (+ %d)n", v.base, v.width,v.height,
- pb->win.bpp, pb->win.bpl, pb->win.pad);
- pb->cmd_buff_inited = 0;
- if(pb->overlay) {
- suspend_overlay(pb);
- fill_cmd_buff(pb);
- resume_overlay(pb);
- }
- planb_unlock(pb);
- return 0;
- }
- case VIDIOCGFBUF:
- {
- struct video_buffer v;
- DBG("PlanB: IOCTL VIDIOCGFBUFn");
- v.base = (void *)pb->fb.phys;
- v.height = pb->win.sheight;
- v.width = pb->win.swidth;
- v.depth = pb->win.depth;
- v.bytesperline = pb->win.bpl + pb->win.pad;
- if (copy_to_user(arg, &v, sizeof(v)))
- return -EFAULT;
- return 0;
- }
- case VIDIOCCAPTURE:
- {
- int i;
- if(copy_from_user(&i, arg, sizeof(i)))
- return -EFAULT;
- if(i==0) {
- DBG("PlanB: IOCTL VIDIOCCAPTURE Stopn");
- if (!(pb->overlay))
- return 0;
- planb_lock(pb);
- pb->overlay = 0;
- overlay_stop(pb);
- planb_unlock(pb);
- } else {
- DBG("PlanB: IOCTL VIDIOCCAPTURE Startn");
- if (pb->fb.phys == 0 ||
- pb->win.width == 0 ||
- pb->win.height == 0)
- return -EINVAL;
- if (pb->overlay)
- return 0;
- planb_lock(pb);
- pb->overlay = 1;
- if(!(pb->cmd_buff_inited))
- fill_cmd_buff(pb);
- overlay_start(pb);
- planb_unlock(pb);
- }
- return 0;
- }
- case VIDIOCGCHAN:
- {
- struct video_channel v;
- DBG("PlanB: IOCTL VIDIOCGCHANn");
- if(copy_from_user(&v, arg,sizeof(v)))
- return -EFAULT;
- v.flags = 0;
- v.tuners = 0;
- v.type = VIDEO_TYPE_CAMERA;
- v.norm = pb->win.norm;
- switch(v.channel)
- {
- case 0:
- strcpy(v.name,"Composite");
- break;
- case 1:
- strcpy(v.name,"SVHS");
- break;
- default:
- return -EINVAL;
- break;
- }
- if(copy_to_user(arg,&v,sizeof(v)))
- return -EFAULT;
- return 0;
- }
- case VIDIOCSCHAN:
- {
- struct video_channel v;
- DBG("PlanB: IOCTL VIDIOCSCHANn");
- if(copy_from_user(&v, arg, sizeof(v)))
- return -EFAULT;
- if (v.norm != pb->win.norm) {
- int i, maxlines;
- switch (v.norm)
- {
- case VIDEO_MODE_PAL:
- case VIDEO_MODE_SECAM:
- maxlines = PLANB_MAXLINES;
- break;
- case VIDEO_MODE_NTSC:
- maxlines = PLANB_NTSC_MAXLINES;
- break;
- default:
- DBG(" invalid norm %d.n", v.norm);
- return -EINVAL;
- break;
- }
- planb_lock(pb);
- /* empty the grabbing queue */
- while(pb->grabbing)
- interruptible_sleep_on(&pb->capq);
- pb->maxlines = maxlines;
- pb->win.norm = v.norm;
- /* Stop overlay if running */
- suspend_overlay(pb);
- for(i = 0; i < MAX_GBUFFERS; i++)
- pb->gbuf[i].norm_switch = 1;
- /* I know it's an overkill, but.... */
- fill_cmd_buff(pb);
- /* ok, now init it accordingly */
- saa_init_regs (pb);
- /* restart overlay if it was running */
- resume_overlay(pb);
- planb_unlock(pb);
- }
- switch(v.channel)
- {
- case 0: /* Composite */
- saa_set (SAA7196_IOCC,
- ((saa_regs[pb->win.norm][SAA7196_IOCC] &
- ~7) | 3), pb);
- break;
- case 1: /* SVHS */
- saa_set (SAA7196_IOCC,
- ((saa_regs[pb->win.norm][SAA7196_IOCC] &
- ~7) | 4), pb);
- break;
- default:
- DBG(" invalid channel %d.n", v.channel);
- return -EINVAL;
- break;
- }
- return 0;
- }
- case VIDIOCGPICT:
- {
- struct video_picture vp = pb->picture;
- DBG("PlanB: IOCTL VIDIOCGPICTn");
- vp.palette = pb->win.color_fmt;
- if(copy_to_user(arg,&vp,sizeof(vp)))
- return -EFAULT;
- return 0;
- }
- case VIDIOCSPICT:
- {
- struct video_picture vp;
- DBG("PlanB: IOCTL VIDIOCSPICTn");
- if(copy_from_user(&vp,arg,sizeof(vp)))
- return -EFAULT;
- pb->picture = vp;
- /* Should we do sanity checks here? */
- planb_lock(pb);
- saa_set (SAA7196_BRIG, (unsigned char)
- ((pb->picture.brightness) >> 8), pb);
- saa_set (SAA7196_HUEC, (unsigned char)
- ((pb->picture.hue) >> 8) ^ 0x80, pb);
- saa_set (SAA7196_CSAT, (unsigned char)
- ((pb->picture.colour) >> 9), pb);
- saa_set (SAA7196_CONT, (unsigned char)
- ((pb->picture.contrast) >> 9), pb);
- planb_unlock(pb);
- return 0;
- }
- case VIDIOCSWIN:
- {
- struct video_window vw;
- struct video_clip clip;
- int i;
-
- DBG("PlanB: IOCTL VIDIOCSWINn");
- if(copy_from_user(&vw,arg,sizeof(vw)))
- return -EFAULT;
- planb_lock(pb);
- /* Stop overlay if running */
- suspend_overlay(pb);
- pb->win.interlace = (vw.height > pb->maxlines/2)? 1: 0;
- if (pb->win.x != vw.x ||
- pb->win.y != vw.y ||
- pb->win.width != vw.width ||
- pb->win.height != vw.height ||
- !pb->cmd_buff_inited) {
- pb->win.x = vw.x;
- pb->win.y = vw.y;
- pb->win.width = vw.width;
- pb->win.height = vw.height;
- fill_cmd_buff(pb);
- }
- DBG("PlanB: Window at (%d,%d) size %dx%dn", vw.x, vw.y, vw.width,
- vw.height);
- /* Reset clip mask */
- memset ((void *) pb->mask, 0xff, (pb->maxlines
- * ((PLANB_MAXPIXELS + 7) & ~7)) / 8);
- /* Add any clip rects */
- for (i = 0; i < vw.clipcount; i++) {
- if (copy_from_user(&clip, vw.clips + i,
- sizeof(struct video_clip)))
- return -EFAULT;
- add_clip(pb, &clip);
- }
- /* restart overlay if it was running */
- resume_overlay(pb);
- planb_unlock(pb);
- return 0;
- }
- case VIDIOCGWIN:
- {
- struct video_window vw;
- DBG("PlanB: IOCTL VIDIOCGWINn");
- vw.x=pb->win.x;
- vw.y=pb->win.y;
- vw.width=pb->win.width;
- vw.height=pb->win.height;
- vw.chromakey=0;
- vw.flags=0;
- if(pb->win.interlace)
- vw.flags|=VIDEO_WINDOW_INTERLACE;
- if(copy_to_user(arg,&vw,sizeof(vw)))
- return -EFAULT;
- return 0;
- }
- case VIDIOCSYNC: {
- int i;
- gbuf_ptr gbuf;
- DBG("PlanB: IOCTL VIDIOCSYNCn");
- if(copy_from_user((void *)&i,arg,sizeof(int)))
- return -EFAULT;
- DBG("PlanB: sync to frame %dn", i);
- if(i > (MAX_GBUFFERS - 1) || i < 0)
- return -EINVAL;
- gbuf = &pb->gbuf[i];
- chk_grab:
- switch (*gbuf->status) {
- case GBUFFER_UNUSED:
- return -EINVAL;
- case GBUFFER_GRABBING:
- DBG("PlanB: waiting for grab"
- " done (%d)n", i);
- interruptible_sleep_on(&pb->capq);
- if(signal_pending(current))
- return -EINTR;
- goto chk_grab;
- case GBUFFER_DONE:
- *gbuf->status = GBUFFER_UNUSED;
- break;
- }
- return 0;
- }
- case VIDIOCMCAPTURE:
- {
- struct video_mmap vm;
- int fr;
- DBG("PlanB: IOCTL VIDIOCMCAPTUREn");
- if(copy_from_user((void *) &vm,(void *)arg,sizeof(vm)))
- return -EFAULT;
- fr = vm.frame;
- if(fr > (MAX_GBUFFERS - 1) || fr < 0)
- return -EINVAL;
- if (*pb->gbuf[fr].status != GBUFFER_UNUSED)
- return -EBUSY;
- return vgrab(pb, &vm);
- }
-
- case VIDIOCGMBUF:
- {
- int i;
- struct video_mbuf vm;
- DBG("PlanB: IOCTL VIDIOCGMBUFn");
- memset(&vm, 0 , sizeof(vm));
- vm.size = PLANB_MAX_FBUF * MAX_GBUFFERS;
- vm.frames = MAX_GBUFFERS;
- for(i = 0; i<MAX_GBUFFERS; i++)
- vm.offsets[i] = PLANB_MAX_FBUF * i;
- if(copy_to_user((void *)arg, (void *)&vm, sizeof(vm)))
- return -EFAULT;
- return 0;
- }
-
- case VIDIOCGUNIT:
- {
- struct video_unit vu;
- DBG("PlanB: IOCTL VIDIOCGUNITn");
- vu.video=pb->video_dev.minor;
- vu.vbi=pb->vbi_dev.minor;
- vu.radio=VIDEO_NO_UNIT;
- vu.audio=VIDEO_NO_UNIT;
- vu.teletext=VIDEO_NO_UNIT;
- if(copy_to_user((void *)arg, (void *)&vu, sizeof(vu)))
- return -EFAULT;
- return 0;
- }
- case PLANBIOCGSAAREGS:
- {
- struct planb_saa_regs preg;
- DBG("PlanB: IOCTL PLANBIOCGSAAREGSn");
- if(copy_from_user(&preg, arg, sizeof(preg)))
- return -EFAULT;
- if(preg.addr >= SAA7196_NUMREGS)
- return -EINVAL;
- preg.val = saa_regs[pb->win.norm][preg.addr];
- if(copy_to_user((void *)arg, (void *)&preg,
- sizeof(preg)))
- return -EFAULT;
- return 0;
- }
-
- case PLANBIOCSSAAREGS:
- {
- struct planb_saa_regs preg;
- DBG("PlanB: IOCTL PLANBIOCSSAAREGSn");
- if(copy_from_user(&preg, arg, sizeof(preg)))
- return -EFAULT;
- if(preg.addr >= SAA7196_NUMREGS)
- return -EINVAL;
- saa_set (preg.addr, preg.val, pb);
- return 0;
- }
-
- case PLANBIOCGSTAT:
- {
- struct planb_stat_regs pstat;
- DBG("PlanB: IOCTL PLANBIOCGSTATn");
- pstat.ch1_stat = readl(&pb->planb_base->ch1.status);
- pstat.ch2_stat = readl(&pb->planb_base->ch2.status);
- pstat.ch1_cmdbase = (unsigned long)pb->vid_cbo.start;
- pstat.ch2_cmdbase = (unsigned long)pb->clip_cbo.start;
- pstat.ch1_cmdptr = readl(&pb->planb_base->ch1.cmdptr);
- pstat.ch2_cmdptr = readl(&pb->planb_base->ch2.cmdptr);
- pstat.saa_stat0 = saa_status(0, pb);
- pstat.saa_stat1 = saa_status(1, pb);
- if(copy_to_user((void *)arg, (void *)&pstat,
- sizeof(pstat)))
- return -EFAULT;
- return 0;
- }
- case PLANBIOCSMODE: {
- int v;
- DBG("PlanB: IOCTL PLANBIOCSMODEn");
- if(copy_from_user(&v, arg, sizeof(v)))
- return -EFAULT;
- switch(v)
- {
- case PLANB_TV_MODE:
- saa_set (SAA7196_STDC,
- (saa_regs[pb->win.norm][SAA7196_STDC] &
- 0x7f), pb);
- break;
- case PLANB_VTR_MODE:
- saa_set (SAA7196_STDC,
- (saa_regs[pb->win.norm][SAA7196_STDC] |
- 0x80), pb);
- break;
- default:
- return -EINVAL;
- break;
- }
- pb->win.mode = v;
- return 0;
- }
- case PLANBIOCGMODE: {
- int v=pb->win.mode;
- DBG("PlanB: IOCTL PLANBIOCGMODEn");
- if(copy_to_user(arg,&v,sizeof(v)))
- return -EFAULT;
- return 0;
- }
- #ifdef PLANB_GSCANLINE
- case PLANBG_GRAB_BPL: {
- int v=pb->gbytes_per_line;
- DBG("PlanB: IOCTL PLANBG_GRAB_BPLn");
- if(copy_to_user(arg,&v,sizeof(v)))
- return -EFAULT;
- return 0;
- }
- #endif /* PLANB_GSCANLINE */
- /* These serve only for debugging... */
- #ifdef DEBUG
- case PLANB_INTR_DEBUG: {
- int i;
- DBG("PlanB: IOCTL PLANB_INTR_DEBUGn");
- if(copy_from_user(&i, arg, sizeof(i)))
- return -EFAULT;
- /* avoid hang ups all together */
- for (i = 0; i < MAX_GBUFFERS; i++) {
- if(*pb->gbuf[i].status == GBUFFER_GRABBING) {
- *pb->gbuf[i].status = GBUFFER_DONE;
- }
- }
- if(pb->grabbing)
- pb->grabbing--;
- wake_up_interruptible(&pb->capq);
- return 0;
- }
- case PLANB_INV_REGS: {
- int i;
- struct planb_any_regs any;
- DBG("PlanB: IOCTL PLANB_INV_REGSn");
- if(copy_from_user(&any, arg, sizeof(any)))
- return -EFAULT;
- if(any.offset < 0 || any.offset + any.bytes > 0x400)
- return -EINVAL;
- if(any.bytes > 128)
- return -EINVAL;
- for (i = 0; i < any.bytes; i++) {
- any.data[i] =
- readb((unsigned char *)pb->planb_base
- + any.offset + i);
- }
- if(copy_to_user(arg,&any,sizeof(any)))
- return -EFAULT;
- return 0;
- }
- case PLANBIOCGDBDMABUF:
- {
- struct planb_buf_regs buf;
- dbdma_cmd_ptr dc;
- int i;
- DBG("PlanB: IOCTL PLANBIOCGDBDMABUFn");
- if(copy_from_user(&buf, arg, sizeof(buf)))
- return -EFAULT;
- buf.end &= ~0xf;
- if( (buf.start < 0) || (buf.end < 0x10) ||
- (buf.end < buf.start+0x10) ||
- (buf.end > 2*pb->tab_size) )
- return -EINVAL;
- printk ("PlanB DBDMA command buffer:n");
- for (i=(buf.start>>4); i<=(buf.end>>4); i++) {
- printk(" 0x%04x:", i<<4);
- dc = pb->vid_cbo.start + i;
- printk (" %04x %04x %08x %08x %04x %04xn",
- dc->req_count, dc->command, dc->phy_addr,
- dc->cmd_dep, dc->res_count, dc->xfer_status);
- }
- return 0;
- }
- #endif /* DEBUG */
- default:
- {
- DBG("PlanB: Unimplemented IOCTL: %d (0x%x)n", cmd, cmd);
- return -ENOIOCTLCMD;
- }
- /* Some IOCTLs are currently unsupported on PlanB */
- case VIDIOCGTUNER: {
- DBG("PlanB: IOCTL VIDIOCGTUNERn");
- goto unimplemented; }
- case VIDIOCSTUNER: {
- DBG("PlanB: IOCTL VIDIOCSTUNERn");
- goto unimplemented; }
- case VIDIOCSFREQ: {
- DBG("PlanB: IOCTL VIDIOCSFREQn");
- goto unimplemented; }
- case VIDIOCGFREQ: {
- DBG("PlanB: IOCTL VIDIOCGFREQn");
- goto unimplemented; }
- case VIDIOCKEY: {
- DBG("PlanB: IOCTL VIDIOCKEYn");
- goto unimplemented; }
- case VIDIOCSAUDIO: {
- DBG("PlanB: IOCTL VIDIOCSAUDIOn");
- goto unimplemented; }
- case VIDIOCGAUDIO: {
- DBG("PlanB: IOCTL VIDIOCGAUDIOn");
- goto unimplemented; }
- unimplemented:
- DBG(" Unimplementedn");
- return -ENOIOCTLCMD;
- }
- return 0;
- }
- static int planb_mmap(struct video_device *dev, const char *adr, unsigned long size)
- {
- struct planb *pb = (struct planb *)dev->priv;
- unsigned long start = (unsigned long)adr;
- int i;
- if (size > MAX_GBUFFERS * PLANB_MAX_FBUF)
- return -EINVAL;
- if (!pb->rawbuf) {
- int err;
- if((err=grabbuf_alloc(pb)))
- return err;
- }
- for (i = 0; i < pb->rawbuf_nchunks; i++) {
- if (remap_page_range(start, virt_to_phys((void *)pb->rawbuf[i]),
- PAGE_SIZE, PAGE_SHARED))
- return -EAGAIN;
- start += PAGE_SIZE;
- if (size <= PAGE_SIZE)
- break;
- size -= PAGE_SIZE;
- }
- return 0;
- }
- /**********************************
- * VBI device operation functions *
- **********************************/
- static long planb_vbi_read(struct video_device *dev, char *buf,
- unsigned long count, int nonblock)
- {
- struct planb *pb = (struct planb *)dev->priv;
- int q,todo;
- DECLARE_WAITQUEUE(wait, current);
- /* Dummy for now */
- printk ("PlanB: VBI read %li bytes.n", count);
- return (0);
- todo=count;
- while (todo && todo>(q=VBIBUF_SIZE-pb->vbip))
- {
- if(copy_to_user((void *) buf, (void *) pb->vbibuf+pb->vbip, q))
- return -EFAULT;
- todo-=q;
- buf+=q;
- add_wait_queue(&pb->vbiq, &wait);
- current->state = TASK_INTERRUPTIBLE;
- if (todo && q==VBIBUF_SIZE-pb->vbip) {
- if(nonblock) {
- remove_wait_queue(&pb->vbiq, &wait);
- current->state = TASK_RUNNING;
- if(count==todo)
- return -EWOULDBLOCK;
- return count-todo;
- }
- schedule();
- if(signal_pending(current)) {
- remove_wait_queue(&pb->vbiq, &wait);
- current->state = TASK_RUNNING;
- if(todo==count)
- return -EINTR;
- else
- return count-todo;
- }
- }
- remove_wait_queue(&pb->vbiq, &wait);
- current->state = TASK_RUNNING;
- }
- if (todo) {
- if(copy_to_user((void *) buf, (void *) pb->vbibuf+pb->vbip,
- todo))
- return -EFAULT;
- pb->vbip+=todo;
- }
- return count;
- }
- static unsigned int planb_vbi_poll(struct video_device *dev,
- struct file *file, poll_table *wait)
- {
- struct planb *pb = (struct planb *)dev->priv;
- unsigned int mask = 0;
- printk ("PlanB: VBI poll.n");
- poll_wait(file, &pb->vbiq, wait);
- if (pb->vbip < VBIBUF_SIZE)
- mask |= (POLLIN | POLLRDNORM);
- return mask;
- }
- static int planb_vbi_open(struct video_device *dev, int flags)
- {
- struct planb *pb = (struct planb *)dev->priv;
- int err;
- /* first open on the driver? */
- if(pb->vid_user + pb->vbi_user == 0) {
- if((err = planb_prepare_open(pb)) != 0)
- return err;
- }
- /* first open on the vbi device? */
- if(pb->vbi_user == 1) {
- if((err = planb_prepare_vbi(pb)) != 0)
- return err;
- }
- ++pb->vbi_user;
- DBG("PlanB: VBI openn");
- MOD_INC_USE_COUNT;
- return 0;
- }
- static void planb_vbi_close(struct video_device *dev)
- {
- struct planb *pb = (struct planb *)dev->priv;
- /* last close on vbi device? */
- if(--pb->vbi_user == 0) {
- planb_close_vbi(pb);
- }
- /* last close on any planb device? */
- if(pb->vid_user + pb->vbi_user == 0) {
- planb_prepare_close(pb);
- }
- DBG("PlanB: VBI closen");
- MOD_DEC_USE_COUNT;
- return;
- }
- static int planb_vbi_ioctl(struct video_device *dev, unsigned int cmd,
- void *arg)
- {
- switch (cmd) {
- /* This is only for alevt */
- case BTTV_VBISIZE:
- DBG("PlanB: IOCTL BTTV_VBISIZE.n");
- return VBIBUF_SIZE;
- default:
- DBG("PlanB: Unimplemented VBI IOCTL no. %i.n", cmd);
- return -EINVAL;
- }
- }
- static struct video_device planb_template=
- {
- owner: THIS_MODULE,
- name: PLANB_DEVICE_NAME,
- type: VID_TYPE_CAPTURE|VID_TYPE_OVERLAY,
- hardware: VID_HARDWARE_PLANB,
- open: planb_open,
- close: planb_close,
- read: planb_read,
- write: planb_write, /* not implemented */
- ioctl: planb_ioctl,
- mmap: planb_mmap, /* mmap? */
- };
- static struct video_device planb_vbi_template=
- {
- owner: THIS_MODULE,
- name: PLANB_VBI_NAME,
- type: VID_TYPE_CAPTURE|VID_TYPE_TELETEXT,
- hardware: VID_HARDWARE_PLANB,
- open: planb_vbi_open,
- close: planb_vbi_close,
- read: planb_vbi_read,
- write: planb_write, /* not implemented */
- poll: planb_vbi_poll,
- ioctl: planb_vbi_ioctl,
- };
- static int __devinit init_planb(struct planb *pb)
- {
- unsigned char saa_rev;
- int i, result;
- unsigned long flags;
- printk(KERN_INFO "PlanB: PowerMacintosh video input driver rev. %sn", PLANB_REV);
- pb->video_dev.minor = -1;
- pb->vid_user = 0;
- /* Simple sanity check */
- if(def_norm >= NUM_SUPPORTED_NORM || def_norm < 0) {
- printk(KERN_ERR "PlanB: Option(s) invalidn");
- return -2;
- }
- memset ((void *) &pb->win, 0, sizeof (struct planb_window));
- pb->win.norm = def_norm;
- pb->win.mode = PLANB_TV_MODE; /* TV mode */
- pb->win.interlace = 1;
- pb->win.x = 0;
- pb->win.y = 0;
- pb->win.width = 768; /* 640 */
- pb->win.height = 576; /* 480 */
- pb->win.pad = 0;
- pb->win.bpp = 4;
- pb->win.depth = 32;
- pb->win.color_fmt = VIDEO_PALETTE_RGB32;
- pb->win.bpl = 1024 * pb->win.bpp;
- pb->win.swidth = 1024;
- pb->win.sheight = 768;
- pb->maxlines = 576;
- #ifdef PLANB_GSCANLINE
- if((pb->gbytes_per_line = PLANB_MAXPIXELS * 4) > PAGE_SIZE
- || (pb->gbytes_per_line <= 0))
- return -3;
- else {
- /* page align pb->gbytes_per_line for DMA purpose */
- for(i = PAGE_SIZE; pb->gbytes_per_line < (i >> 1);)
- i >>= 1;
- pb->gbytes_per_line = i;
- }
- #endif
- pb->tab_size = PLANB_MAXLINES + 40;
- pb->suspend = 0;
- init_MUTEX(&pb->lock);
- pb->vid_cbo.start = 0;
- pb->clip_cbo.start = 0;
- pb->mask = 0;
- pb->vid_raw = 0;
- pb->overlay = 0;
- init_waitqueue_head(&pb->suspendq);
- pb->cmd_buff_inited = 0;
- pb->fb.phys = 0;
- pb->fb.offset = 0;
- /* VBI stuff: */
- pb->vbi_dev.minor = -1;
- pb->vbi_user = 0;
- pb->vbirunning = 0;
- pb->vbip = 0;
- pb->vbibuf = 0;
- init_waitqueue_head(&pb->vbiq);
- /* Reset DMA controllers */
- planb_dbdma_stop(&pb->planb_base->ch2);
- planb_dbdma_stop(&pb->planb_base->ch1);
- saa_rev = (saa_status(0, pb) & 0xf0) >> 4;
- printk(KERN_INFO "PlanB: SAA7196 video processor rev. %dn", saa_rev);
- /* Initialize the SAA registers in memory and on chip */
- saa_init_regs (pb);
- /* clear interrupt mask */
- pb->intr_mask = PLANB_CLR_IRQ;
- save_flags(flags); cli();
- result = request_irq(pb->irq, planb_irq, 0, "PlanB", (void *)pb);
- if (result < 0) {
- if (result==-EINVAL)
- printk(KERN_ERR "PlanB: Bad irq number (%d) "
- "or handlern", (int)pb->irq);
- else if (result==-EBUSY)
- printk(KERN_ERR "PlanB: I don't know why, "
- "but IRQ %d is busyn", (int)pb->irq);
- restore_flags(flags);
- return result;
- }
- disable_irq(pb->irq);
- restore_flags(flags);
-
- pb->picture.brightness=0x90<<8;
- pb->picture.contrast = 0x70 << 8;
- pb->picture.colour = 0x70<<8;
- pb->picture.hue = 0x8000;
- pb->picture.whiteness = 0;
- pb->picture.depth = pb->win.depth;
- init_waitqueue_head(&pb->capq);
- for(i=0; i<MAX_GBUFFERS; i++) {
- gbuf_ptr gbuf = &pb->gbuf[i];
- gbuf->idx = PLANB_MAX_FBUF * i / PAGE_SIZE;
- gbuf->width=0;
- gbuf->height=0;
- gbuf->fmt=0;
- gbuf->cap_cmd=NULL;
- #ifndef PLANB_GSCANLINE
- gbuf->l_fr_addr_idx = MAX_GBUFFERS * (PLANB_MAX_FBUF
- / PAGE_SIZE + 1) + MAX_LNUM * i;
- gbuf->lsize = 0;
- gbuf->lnum = 0;
- #endif
- }
- pb->rawbuf=NULL;
- pb->grabbing=0;
- /* enable interrupts */
- writel(PLANB_CLR_IRQ, &pb->planb_base->intr_stat);
- pb->intr_mask = PLANB_FRM_IRQ;
- enable_irq(pb->irq);
- /* Now add the templates and register the device units. */
- memcpy(&pb->video_dev,&planb_template,sizeof(planb_template));
- pb->video_dev.priv = pb;
- memcpy(&pb->vbi_dev,&planb_vbi_template,sizeof(planb_vbi_template));
-
- if(video_register_device(&pb->video_dev, VFL_TYPE_GRABBER, video_nr)<0)
- return -1;
- if(video_register_device(&pb->vbi_dev, VFL_TYPE_VBI, vbi_nr)<0) {
- video_unregister_device(&pb->video_dev);
- return -1;
- }
- return 0;
- }
- /*
- * Scan for a PlanB controller and map the io memory
- */
- static int find_planb(void)
- {
- struct planb *pb;
- struct pci_dev *pdev = NULL;
- unsigned long base;
- int planb_num = 0;
- if (_machine != _MACH_Pmac)
- return 0;
- pdev = pci_find_device(APPLE_VENDOR_ID, PLANB_DEV_ID, pdev);
- if (pdev == NULL) {
- printk(KERN_WARNING "PlanB: no device found!n");
- return planb_num;
- }
- pb = &planbs;
- planb_num = 1;
- base = pdev->resource[0].start;
- DBG("PlanB: Found device %s, membase 0x%lx, irq %dn",
- pdev->slot_name, base, pdev->irq);
- /* Enable response in memory space, bus mastering,
- use memory write and invalidate */
- pci_enable_device (pdev);
- pci_set_master (pdev);
- pci_set_mwi(pdev);
- /* value copied from MacOS... */
- pci_write_config_byte (pdev, PCI_LATENCY_TIMER, 0x40);
- planb_regs = (volatile struct planb_registers *)
- ioremap (base, 0x400);
- pb->planb_base = planb_regs;
- pb->planb_base_bus = (struct planb_registers *)base;
- pb->irq = pdev->irq;
-
- return planb_num;
- }
- static void release_planb(void)
- {
- struct planb *pb;
- pb=&planbs;
- /* stop and flush DMAs unconditionally */
- planb_dbdma_stop(&pb->planb_base->ch2);
- planb_dbdma_stop(&pb->planb_base->ch1);
- /* clear and free interrupts */
- pb->intr_mask = PLANB_CLR_IRQ;
- writel(PLANB_CLR_IRQ, &pb->planb_base->intr_stat);
- free_irq(pb->irq, pb);
- /* make sure all allocated memory are freed */
- planb_prepare_close(pb);
- printk(KERN_INFO "PlanB: unregistering with v4ln");
- video_unregister_device(&pb->video_dev);
- video_unregister_device(&pb->vbi_dev);
- /* note that iounmap() does nothing on the PPC right now */
- iounmap ((void *)pb->planb_base);
- }
- static int __init init_planbs(void)
- {
- int planb_num;
- planb_num=find_planb();
- if (planb_num < 0)
- return -EIO;
- if (planb_num == 0)
- return -ENXIO;
- if (init_planb(&planbs) < 0) {
- printk(KERN_ERR "PlanB: error registering planb device"
- " with v4ln");
- release_planb();
- return -EIO;
- }
- return 0;
- }
- static void __exit exit_planbs(void)
- {
- release_planb();
- }
- module_init(init_planbs);
- module_exit(exit_planbs);