diff options
Diffstat (limited to 'drivers/media/video/planb.c')
| -rw-r--r-- | drivers/media/video/planb.c | 2303 |
1 files changed, 2303 insertions, 0 deletions
diff --git a/drivers/media/video/planb.c b/drivers/media/video/planb.c new file mode 100644 index 00000000000..b19c33434ea --- /dev/null +++ b/drivers/media/video/planb.c @@ -0,0 +1,2303 @@ +/* + planb - PlanB frame grabber driver + + PlanB is used in the 7x00/8x00 series of PowerMacintosh + Computers as video input DMA controller. + + Copyright (C) 1998 Michel Lanners (mlan@cpu.lu) + + Based largely on the bttv driver by Ralph Metzler (rjkm@thp.uni-koeln.de) + + Additional debugging and coding by Takashi Oe (toe@unlserve.unl.edu) + + 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 1.18 1999/05/02 17:36:34 mlan Exp $ */ + +#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/videodev.h> +#include <linux/wait.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> + +#include "planb.h" +#include "saa7196.h" + +/* Would you mind for some ugly debugging? */ +#if 0 +#define DEBUG(x...) printk(KERN_DEBUG ## x) /* Debug driver */ +#else +#define DEBUG(x...) /* Don't debug driver */ +#endif + +#if 0 +#define IDEBUG(x...) printk(KERN_DEBUG ## x) /* Debug interrupt part */ +#else +#define IDEBUG(x...) /* Don't debug interrupt part */ +#endif + +/* Ever seen a Mac with more than 1 of these? */ +#define PLANB_MAX 1 + +static int planb_num; +static struct planb planbs[PLANB_MAX]; +static volatile struct planb_registers *planb_regs; + +static int def_norm = PLANB_DEF_NORM; /* default norm */ +static int video_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_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_init_done(struct video_device *); +static int planb_mmap(struct video_device *, const char *, unsigned long); +static void planb_irq(int, void *, struct pt_regs *); +static void release_planb(void); +int init_planbs(struct video_init *); + +/* ------------------ PlanB Internal Functions ------------------ */ +static int planb_prepare_open(struct planb *); +static void planb_prepare_close(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 volatile struct dbdma_cmd *setup_grab_cmd(int, struct planb *); +static void overlay_start(struct planb *); +static void overlay_stop(struct planb *); +static inline void tab_cmd_dbdma(volatile struct dbdma_cmd *, unsigned short, + unsigned int); +static inline void tab_cmd_store(volatile struct dbdma_cmd *, unsigned int, + unsigned int); +static inline void tab_cmd_gen(volatile struct dbdma_cmd *, 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, int, struct planb *); +static volatile struct dbdma_cmd *cmd_geo_setup(volatile struct dbdma_cmd *, + int, int, int, int, int, struct planb *); +static inline void planb_dbdma_stop(volatile struct dbdma_regs *); +static unsigned int saa_geo_setup(int, int, int, int, struct planb *); +static inline int overlay_is_active(struct planb *); + +/*******************************/ +/* Memory management functions */ +/*******************************/ + +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; + SetPageReserved(virt_to_page(pb->rawbuf[i])); + } + if (i-- < npage) { + printk(KERN_DEBUG "PlanB: init_grab: grab buffer not allocated\n"); + for (; i > 0; i--) { + ClearPageReserved(virt_to_page(pb->rawbuf[i])); + free_pages((unsigned long)pb->rawbuf[i], 0); + } + kfree(pb->rawbuf); + return -ENOBUFS; + } + pb->rawbuf_size = 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 */ + msleep_interruptible(30); + + 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 unsigned int saa_geo_setup(int width, int height, int interlace, int bpp, + struct planb *pb) +{ + int ht, norm = pb->win.norm; + + switch(bpp) { + case 2: + /* RGB555+a 1x16-bit + 16-bit transparent */ + saa_regs[norm][SAA7196_FMTS] &= ~0x3; + break; + case 1: + case 4: + /* RGB888 1x24-bit + 8-bit transparent */ + saa_regs[norm][SAA7196_FMTS] &= ~0x1; + saa_regs[norm][SAA7196_FMTS] |= 0x2; + break; + default: + return -EINVAL; + } + 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; + + return 0; +} + +/***************************/ +/* DBDMA support functions */ +/***************************/ + +static inline void planb_dbdma_restart(volatile struct dbdma_regs *ch) +{ + out_le32(&ch->control, PLANB_CLR(RUN)); + out_le32(&ch->control, PLANB_SET(RUN|WAKE) | PLANB_CLR(PAUSE)); +} + +static inline void planb_dbdma_stop(volatile struct dbdma_regs *ch) +{ + int i = 0; + + out_le32(&ch->control, PLANB_CLR(RUN) | PLANB_SET(FLUSH)); + while((in_le32(&ch->status) == (ACTIVE | FLUSH)) && (i < 999)) { + IDEBUG("PlanB: waiting for DMA to stop\n"); + i++; + } +} + +static inline void tab_cmd_dbdma(volatile struct dbdma_cmd *ch, + unsigned short command, unsigned int cmd_dep) +{ + st_le16(&ch->command, command); + st_le32(&ch->cmd_dep, cmd_dep); +} + +static inline void tab_cmd_store(volatile struct dbdma_cmd *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); +} + +static inline void tab_cmd_gen(volatile struct dbdma_cmd *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); +} + +static volatile struct dbdma_cmd *cmd_geo_setup( + volatile struct dbdma_cmd *c1, int width, int height, int interlace, + int bpp, int clip, struct planb *pb) +{ + int norm = pb->win.norm; + + if((saa_geo_setup(width, height, interlace, bpp, pb)) != 0) + return (volatile struct dbdma_cmd *)NULL; + tab_cmd_store(c1++, (unsigned)(&pb->planb_base_phys->saa_addr), + SAA7196_FMTS); + tab_cmd_store(c1++, (unsigned)(&pb->planb_base_phys->saa_regval), + saa_regs[norm][SAA7196_FMTS]); + tab_cmd_store(c1++, (unsigned)(&pb->planb_base_phys->saa_addr), + SAA7196_DPATH); + tab_cmd_store(c1++, (unsigned)(&pb->planb_base_phys->saa_regval), + saa_regs[norm][SAA7196_DPATH]); + tab_cmd_store(c1++, (unsigned)(&pb->planb_base_phys->even), + bpp | ((clip)? PLANB_CLIPMASK: 0)); + tab_cmd_store(c1++, (unsigned)(&pb->planb_base_phys->odd), + bpp | ((clip)? PLANB_CLIPMASK: 0)); + tab_cmd_store(c1++, (unsigned)(&pb->planb_base_phys->saa_addr), + SAA7196_OUTPIX); + tab_cmd_store(c1++, (unsigned)(&pb->planb_base_phys->saa_regval), + saa_regs[norm][SAA7196_OUTPIX]); + tab_cmd_store(c1++, (unsigned)(&pb->planb_base_phys->saa_addr), + SAA7196_HFILT); + tab_cmd_store(c1++, (unsigned)(&pb->planb_base_phys->saa_regval), + saa_regs[norm][SAA7196_HFILT]); + tab_cmd_store(c1++, (unsigned)(&pb->planb_base_phys->saa_addr), + SAA7196_OUTLINE); + tab_cmd_store(c1++, (unsigned)(&pb->planb_base_phys->saa_regval), + saa_regs[norm][SAA7196_OUTLINE]); + tab_cmd_store(c1++, (unsigned)(&pb->planb_base_phys->saa_addr), + SAA7196_VYP); + tab_cmd_store(c1++, (unsigned)(&pb->planb_base_phys->saa_regval), + saa_regs[norm][SAA7196_VYP]); + return c1; +} + +/******************************/ +/* misc. supporting functions */ +/******************************/ + +static inline void planb_lock(struct planb *pb) +{ + down(&pb->lock); +} + +static inline void planb_unlock(struct planb *pb) +{ + up(&pb->lock); +} + +/***************/ +/* Driver Core */ +/***************/ + +static int planb_prepare_open(struct planb *pb) +{ + int i, size; + + /* 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)+1+MAX_GBUFFERS + * PLANB_DUMMY)*sizeof(struct dbdma_cmd) + +(PLANB_MAXLINES*((PLANB_MAXPIXELS+7)& ~7))/8 + +MAX_GBUFFERS*sizeof(unsigned int); + if ((pb->priv_space = kmalloc (size, GFP_KERNEL)) == 0) + return -ENOMEM; + memset ((void *) pb->priv_space, 0, size); + pb->overlay_last1 = pb->ch1_cmd = (volatile struct dbdma_cmd *) + DBDMA_ALIGN (pb->priv_space); + pb->overlay_last2 = pb->ch2_cmd = pb->ch1_cmd + pb->tab_size; + pb->ch1_cmd_phys = virt_to_bus(pb->ch1_cmd); + pb->cap_cmd[0] = pb->ch2_cmd + pb->tab_size; + pb->pre_cmd[0] = pb->cap_cmd[0] + pb->tab_size * TAB_FACTOR; + for (i = 1; i < MAX_GBUFFERS; i++) { + pb->cap_cmd[i] = pb->pre_cmd[i-1] + PLANB_DUMMY; + pb->pre_cmd[i] = pb->cap_cmd[i] + pb->tab_size * TAB_FACTOR; + } + pb->frame_stat=(volatile unsigned int *)(pb->pre_cmd[MAX_GBUFFERS-1] + + PLANB_DUMMY); + pb->mask = (unsigned char *)(pb->frame_stat+MAX_GBUFFERS); + + pb->rawbuf = NULL; + pb->rawbuf_size = 0; + pb->grabbing = 0; + for (i = 0; i < MAX_GBUFFERS; i++) { + pb->frame_stat[i] = GBUFFER_UNUSED; + pb->gwidth[i] = 0; + pb->gheight[i] = 0; + pb->gfmt[i] = 0; + pb->gnorm_switch[i] = 0; +#ifndef PLANB_GSCANLINE + pb->lsize[i] = 0; + pb->lnum[i] = 0; +#endif /* PLANB_GSCANLINE */ + } + 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); + + return 0; +} + +static void planb_prepare_close(struct planb *pb) +{ + int i; + + /* make sure the dma's are idle */ + planb_dbdma_stop(&pb->planb_base->ch2); + planb_dbdma_stop(&pb->planb_base->ch1); + /* free kernel memory of command buffers */ + if(pb->priv_space != 0) { + kfree (pb->priv_space); + pb->priv_space = 0; + pb->cmd_buff_inited = 0; + } + if(pb->rawbuf) { + for (i = 0; i < pb->rawbuf_size; i++) { + ClearPageReserved(virt_to_page(pb->rawbuf[i])); + free_pages((unsigned long)pb->rawbuf[i], 0); + } + kfree(pb->rawbuf); + } + pb->rawbuf = NULL; +} + +/*****************************/ +/* overlay 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)in_le32(&pb->planb_base->ch1.cmdptr); + + return (in_le32(&pb->overlay_last1->cmd_dep) == pb->ch1_cmd_phys) + && (caddr < (pb->ch1_cmd_phys + size)) + && (caddr >= (unsigned)pb->ch1_cmd_phys); +} + +static void overlay_start(struct planb *pb) +{ + + DEBUG("PlanB: overlay_start()\n"); + + if(ACTIVE & in_le32(&pb->planb_base->ch1.status)) { + + DEBUG("PlanB: presumably, grabbing is in progress...\n"); + + planb_dbdma_stop(&pb->planb_base->ch2); + out_le32 (&pb->planb_base->ch2.cmdptr, + virt_to_bus(pb->ch2_cmd)); + planb_dbdma_restart(&pb->planb_base->ch2); + st_le16 (&pb->ch1_cmd->command, DBDMA_NOP); + tab_cmd_dbdma(pb->last_cmd[pb->last_fr], + DBDMA_NOP | BR_ALWAYS, + virt_to_bus(pb->ch1_cmd)); + eieio(); + pb->prev_last_fr = pb->last_fr; + pb->last_fr = -2; + if(!(ACTIVE & in_le32(&pb->planb_base->ch1.status))) { + IDEBUG("PlanB: became inactive " + "in the mean time... reactivating\n"); + planb_dbdma_stop(&pb->planb_base->ch1); + out_le32 (&pb->planb_base->ch1.cmdptr, + virt_to_bus(pb->ch1_cmd)); + planb_dbdma_restart(&pb->planb_base->ch1); + } + } else { + + DEBUG("PlanB: currently idle, so can do whatever\n"); + + planb_dbdma_stop(&pb->planb_base->ch2); + planb_dbdma_stop(&pb->planb_base->ch1); + st_le32 (&pb->planb_base->ch2.cmdptr, + virt_to_bus(pb->ch2_cmd)); + st_le32 (&pb->planb_base->ch1.cmdptr, + virt_to_bus(pb->ch1_cmd)); + out_le16 (&pb->ch1_cmd->command, DBDMA_NOP); + 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) +{ + DEBUG("PlanB: overlay_stop()\n"); + + if(pb->last_fr == -1) { + + DEBUG("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->cap_cmd[pb->prev_last_fr], DBDMA_STOP, 0); + eieio(); + cmd_dep = (unsigned int)in_le32(&pb->overlay_last1->cmd_dep); + if(overlay_is_active(pb)) { + + DEBUG("PlanB: overlay is currently active\n"); + + planb_dbdma_stop(&pb->planb_base->ch2); + planb_dbdma_stop(&pb->planb_base->ch1); + if(cmd_dep != pb->ch1_cmd_phys) { + out_le32(&pb->planb_base->ch1.cmdptr, + virt_to_bus(pb->overlay_last1)); + 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; + + DEBUG("PlanB: suspend_overlay: %d\n", pb->suspend); + + if(pb->suspend++) + return; + if(ACTIVE & in_le32(&pb->planb_base->ch1.status)) { + if(pb->last_fr == -2) { + fr = pb->prev_last_fr; + memcpy(&last, (void*)pb->last_cmd[fr], sizeof(last)); + tab_cmd_dbdma(pb->last_cmd[fr], 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) +{ + + DEBUG("PlanB: resume_overlay: %d\n", pb->suspend); + + if(pb->suspend > 1) + return; + if(pb->suspended.frame != -1) { + memcpy((void*)pb->last_cmd[pb->suspended.frame], + &pb->suspended.cmd, sizeof(pb->suspended.cmd)); + } + if(ACTIVE & in_le32(&pb->planb_base->ch1.status)) { + goto finish; + } + if(pb->suspended.overlay) { + + DEBUG("PlanB: overlay being resumed\n"); + + st_le16 (&pb->ch1_cmd->command, DBDMA_NOP); + st_le16 (&pb->ch2_cmd->command, DBDMA_NOP); + /* Set command buffer addresses */ + st_le32(&pb->planb_base->ch1.cmdptr, + virt_to_bus(pb->overlay_last1)); + out_le32(&pb->planb_base->ch2.cmdptr, + virt_to_bus(pb->overlay_last2)); + /* Start the DMA controller */ + out_le32 (&pb->planb_base->ch2.control, + PLANB_CLR(PAUSE) | PLANB_SET(RUN|WAKE)); + out_le32 (&pb->planb_base->ch1.control, + PLANB_CLR(PAUSE) | PLANB_SET(RUN|WAKE)); + } else if(pb->suspended.frame != -1) { + out_le32(&pb->planb_base->ch1.cmdptr, + virt_to_bus(pb->last_cmd[pb->suspended.frame])); + out_le32 (&pb->planb_base->ch1.control, + PLANB_CLR(PAUSE) | PLANB_SET(RUN|WAKE)); + } + +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; + + DEBUG("PlanB: clip %dx%d+%d+%d\n", 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; + volatile struct dbdma_cmd last; + + DEBUG("PlanB: fill_cmd_buff()\n"); + + if(pb->overlay_last1 != pb->ch1_cmd) { + restore = 1; + last = *(pb->overlay_last1); + } + memset ((void *) pb->ch1_cmd, 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 = in_le32(&pb->overlay_last1->cmd_dep); + if(jump_addr != pb->ch1_cmd_phys) { + int i; + + DEBUG("PlanB: adjusting ch1's jump address\n"); + + for(i = 0; i < MAX_GBUFFERS; i++) { + if(pb->need_pre_capture[i]) { + if(jump_addr == virt_to_bus(pb->pre_cmd[i])) + goto found; + } else { + if(jump_addr == virt_to_bus(pb->cap_cmd[i])) + goto found; + } + } + + DEBUG("PlanB: not found...\n"); + + goto out; +found: + if(pb->need_pre_capture[i]) + out_le32(&pb->pre_cmd[i]->phy_addr, + virt_to_bus(pb->overlay_last1)); + else + out_le32(&pb->cap_cmd[i]->phy_addr, + virt_to_bus(pb->overlay_last1)); + } + } +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; + volatile struct dbdma_cmd *c1 = pb->ch1_cmd; + volatile struct dbdma_cmd *c2 = pb->ch2_cmd; + + 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 */ + if((c1 = cmd_geo_setup(c1, pb->win.width, pb->win.height, interlace, + bpp, 1, pb)) == NULL) { + printk(KERN_WARNING "PlanB: encountered serious problems\n"); + tab_cmd_dbdma(pb->ch1_cmd + 1, DBDMA_STOP, 0); + tab_cmd_dbdma(pb->ch2_cmd + 1, DBDMA_STOP, 0); + return; + } + 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_phys->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_phys->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_phys->ch2.control), + PLANB_SET(CH_SYNC)); + tab_cmd_store(c1++, (unsigned)(&pb->planb_base_phys->ch1.br_sel), + PLANB_SET(DMA_ABORT)); + + base = (pb->frame_buffer_phys + pb->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_phys->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_phys->ch2.control), + PLANB_SET(CH_SYNC)); + tab_cmd_store(c1++, (unsigned)(&pb->planb_base_phys->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, virt_to_bus(pb->ch1_cmd)); + + /* Clipmask command buffer */ + + /* Preamble commands: */ + tab_cmd_dbdma(c2++, DBDMA_NOP, 0); + tab_cmd_store(c2++, (unsigned)(&pb->planb_base_phys->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_phys->ch2.control), + PLANB_CLR(CH_SYNC)); + tab_cmd_store(c2++, (unsigned)(&pb->planb_base_phys->ch2.wait_sel), + PLANB_SET(FIELD_SYNC)); + tab_cmd_store(c2++, (unsigned)(&pb->planb_base_phys->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_phys->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_phys->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_phys->ch1.control), + PLANB_CLR(RUN)); + tab_cmd_store(c2++, (unsigned)(&pb->planb_base_phys->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, virt_to_bus(pb->ch2_cmd)); + + eieio(); + return; +} + +/*********************************/ +/* grabdisplay support functions */ +/*********************************/ + +static int palette2fmt[] = { + 0, + PLANB_GRAY, + 0, + 0, + 0, + PLANB_COLOUR32, + PLANB_COLOUR15, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, +}; + +#define PLANB_PALETTE_MAX 15 + +static int vgrab(struct planb *pb, struct video_mmap *mp) +{ + unsigned int fr = mp->frame; + unsigned int format; + + if(pb->rawbuf==NULL) { + int err; + if((err=grabbuf_alloc(pb))) + return err; + } + + IDEBUG("PlanB: grab %d: %dx%d(%u)\n", pb->grabbing, + mp->width, mp->height, fr); + + if(pb->grabbing >= MAX_GBUFFERS) + return -ENOBUFS; + if(fr > (MAX_GBUFFERS - 1) || fr < 0) + return -EINVAL; + if(mp->height <= 0 || mp->width <= 0) + return -EINVAL; + if(mp->format < 0 || mp->format >= PLANB_PALETTE_MAX) + return -EINVAL; + if((format = palette2fmt[mp->format]) == 0) + return -EINVAL; + if (mp->height * mp->width * format > PLANB_MAX_FBUF) /* format = bpp */ + return -EINVAL; + + planb_lock(pb); + if(mp->width != pb->gwidth[fr] || mp->height != pb->gheight[fr] || + format != pb->gfmt[fr] || (pb->gnorm_switch[fr])) { + int i; +#ifndef PLANB_GSCANLINE + unsigned int osize = pb->gwidth[fr] * pb->gheight[fr] + * pb->gfmt[fr]; + unsigned int nsize = mp->width * mp->height * format; +#endif + + IDEBUG("PlanB: gwidth = %d, gheight = %d, mp->format = %u\n", + mp->width, mp->height, mp->format); + +#ifndef PLANB_GSCANLINE + if(pb->gnorm_switch[fr]) + nsize = 0; + if (nsize < osize) { + for(i = pb->gbuf_idx[fr]; osize > 0; i++) { + memset((void *)pb->rawbuf[i], 0, PAGE_SIZE); + osize -= PAGE_SIZE; + } + } + for(i = pb->l_fr_addr_idx[fr]; i < pb->l_fr_addr_idx[fr] + + pb->lnum[fr]; i++) + memset((void *)pb->rawbuf[i], 0, PAGE_SIZE); +#else +/* XXX TODO */ +/* + if(pb->gnorm_switch[fr]) + memset((void *)pb->gbuffer[fr], 0, + pb->gbytes_per_line * pb->gheight[fr]); + else { + if(mp-> + for(i = 0; i < pb->gheight[fr]; i++) { + memset((void *)(pb->gbuffer[fr] + + pb->gbytes_per_line * i + } + } +*/ +#endif + pb->gwidth[fr] = mp->width; + pb->gheight[fr] = mp->height; + pb->gfmt[fr] = format; + pb->last_cmd[fr] = setup_grab_cmd(fr, pb); + planb_pre_capture(fr, pb->gfmt[fr], pb); /* gfmt = bpp */ + pb->need_pre_capture[fr] = 1; + pb->gnorm_switch[fr] = 0; + } else + pb->need_pre_capture[fr] = 0; + pb->frame_stat[fr] = GBUFFER_GRABBING; + if(!(ACTIVE & in_le32(&pb->planb_base->ch1.status))) { + + IDEBUG("PlanB: ch1 inactive, initiating grabbing\n"); + + planb_dbdma_stop(&pb->planb_base->ch1); + if(pb->need_pre_capture[fr]) { + + IDEBUG("PlanB: padding pre-capture sequence\n"); + + out_le32 (&pb->planb_base->ch1.cmdptr, + virt_to_bus(pb->pre_cmd[fr])); + } else { + tab_cmd_dbdma(pb->last_cmd[fr], DBDMA_STOP, 0); + tab_cmd_dbdma(pb->cap_cmd[fr], DBDMA_NOP, 0); + /* let's be on the safe side. here is not timing critical. */ + tab_cmd_dbdma((pb->cap_cmd[fr] + 1), DBDMA_NOP, 0); + out_le32 (&pb->planb_base->ch1.cmdptr, + virt_to_bus(pb->cap_cmd[fr])); + } + planb_dbdma_restart(&pb->planb_base->ch1); + pb->last_fr = fr; + } else { + int i; + + IDEBUG("PlanB: ch1 active, grabbing being queued\n"); + + if((pb->last_fr == -1) || ((pb->last_fr == -2) && + overlay_is_active(pb))) { + + IDEBUG("PlanB: overlay is active, grabbing defered\n"); + + tab_cmd_dbdma(pb->last_cmd[fr], + DBDMA_NOP | BR_ALWAYS, + virt_to_bus(pb->ch1_cmd)); + if(pb->need_pre_capture[fr]) { + + IDEBUG("PlanB: padding pre-capture sequence\n"); + + tab_cmd_store(pb->pre_cmd[fr], + virt_to_bus(&pb->overlay_last1->cmd_dep), + virt_to_bus(pb->ch1_cmd)); + eieio(); + out_le32 (&pb->overlay_last1->cmd_dep, + virt_to_bus(pb->pre_cmd[fr])); + } else { + tab_cmd_store(pb->cap_cmd[fr], + virt_to_bus(&pb->overlay_last1->cmd_dep), + virt_to_bus(pb->ch1_cmd)); + tab_cmd_dbdma((pb->cap_cmd[fr] + 1), + DBDMA_NOP, 0); + eieio(); + out_le32 (&pb->overlay_last1->cmd_dep, + virt_to_bus(pb->cap_cmd[fr])); + } + for(i = 0; overlay_is_active(pb) && i < 999; i++) + IDEBUG("PlanB: waiting for overlay done\n"); + tab_cmd_dbdma(pb->ch1_cmd, DBDMA_NOP, 0); + pb->prev_last_fr = fr; + pb->last_fr = -2; + } else if(pb->last_fr == -2) { + + IDEBUG("PlanB: mixed mode detected, grabbing" + " will be done before activating overlay\n"); + + tab_cmd_dbdma(pb->ch1_cmd, DBDMA_NOP, 0); + if(pb->need_pre_capture[fr]) { + + IDEBUG("PlanB: padding pre-capture sequence\n"); + + tab_cmd_dbdma(pb->last_cmd[pb->prev_last_fr], + DBDMA_NOP | BR_ALWAYS, + virt_to_bus(pb->pre_cmd[fr])); + eieio(); + } else { + tab_cmd_dbdma(pb->cap_cmd[fr], DBDMA_NOP, 0); + if(pb->gwidth[pb->prev_last_fr] != + pb->gwidth[fr] + || pb->gheight[pb->prev_last_fr] != + pb->gheight[fr] + || pb->gfmt[pb->prev_last_fr] != + pb->gfmt[fr]) + tab_cmd_dbdma((pb->cap_cmd[fr] + 1), + DBDMA_NOP, 0); + else + tab_cmd_dbdma((pb->cap_cmd[fr] + 1), + DBDMA_NOP | BR_ALWAYS, + virt_to_bus(pb->cap_cmd[fr] + 16)); + tab_cmd_dbdma(pb->last_cmd[pb->prev_last_fr], + DBDMA_NOP | BR_ALWAYS, + virt_to_bus(pb->cap_cmd[fr])); + eieio(); + } + tab_cmd_dbdma(pb->last_cmd[fr], + DBDMA_NOP | BR_ALWAYS, + virt_to_bus(pb->ch1_cmd)); + eieio(); + pb->prev_last_fr = fr; + pb->last_fr = -2; + } else { + + IDEBUG("PlanB: active grabbing session detected\n"); + + if(pb->need_pre_capture[fr]) { + + IDEBUG("PlanB: padding pre-capture sequence\n"); + + tab_cmd_dbdma(pb->last_cmd[pb->last_fr], + DBDMA_NOP | BR_ALWAYS, + virt_to_bus(pb->pre_cmd[fr])); + eieio(); + } else { + tab_cmd_dbdma(pb->last_cmd[fr], DBDMA_STOP, 0); + tab_cmd_dbdma(pb->cap_cmd[fr], DBDMA_NOP, 0); + if(pb->gwidth[pb->last_fr] != pb->gwidth[fr] + || pb->gheight[pb->last_fr] != + pb->gheight[fr] + || pb->gfmt[pb->last_fr] != + pb->gfmt[fr]) + tab_cmd_dbdma((pb->cap_cmd[fr] + 1), + DBDMA_NOP, 0); + else + tab_cmd_dbdma((pb->cap_cmd[fr] + 1), + DBDMA_NOP | BR_ALWAYS, + virt_to_bus(pb->cap_cmd[fr] + 16)); + tab_cmd_dbdma(pb->last_cmd[pb->last_fr], + DBDMA_NOP | BR_ALWAYS, + virt_to_bus(pb->cap_cmd[fr])); + eieio(); + } + pb->last_fr = fr; + } + if(!(ACTIVE & in_le32(&pb->planb_base->ch1.status))) { + + IDEBUG("PlanB: became inactive in the mean time..." + "reactivating\n"); + + planb_dbdma_stop(&pb->planb_base->ch1); + out_le32 (&pb->planb_base->ch1.cmdptr, + virt_to_bus(pb->cap_cmd[fr])); + planb_dbdma_restart(&pb->planb_base->ch1); + } + } + pb->grabbing++; + planb_unlock(pb); + + return 0; +} + +static void planb_pre_capture(int fr, int bpp, str |