316 строки
7.5 KiB
C
316 строки
7.5 KiB
C
/*
|
|
* VRFB Rotation Engine
|
|
*
|
|
* Copyright (C) 2009 Nokia Corporation
|
|
* Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* 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.,
|
|
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
*/
|
|
|
|
/*#define DEBUG*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/ioport.h>
|
|
#include <linux/io.h>
|
|
#include <linux/bitops.h>
|
|
#include <linux/mutex.h>
|
|
|
|
#include <mach/io.h>
|
|
#include <plat/vrfb.h>
|
|
#include <plat/sdrc.h>
|
|
|
|
#ifdef DEBUG
|
|
#define DBG(format, ...) pr_debug("VRFB: " format, ## __VA_ARGS__)
|
|
#else
|
|
#define DBG(format, ...)
|
|
#endif
|
|
|
|
#define SMS_ROT_VIRT_BASE(context, rot) \
|
|
(((context >= 4) ? 0xD0000000 : 0x70000000) \
|
|
+ (0x4000000 * (context)) \
|
|
+ (0x1000000 * (rot)))
|
|
|
|
#define OMAP_VRFB_SIZE (2048 * 2048 * 4)
|
|
|
|
#define VRFB_PAGE_WIDTH_EXP 5 /* Assuming SDRAM pagesize= 1024 */
|
|
#define VRFB_PAGE_HEIGHT_EXP 5 /* 1024 = 2^5 * 2^5 */
|
|
#define VRFB_PAGE_WIDTH (1 << VRFB_PAGE_WIDTH_EXP)
|
|
#define VRFB_PAGE_HEIGHT (1 << VRFB_PAGE_HEIGHT_EXP)
|
|
#define SMS_IMAGEHEIGHT_OFFSET 16
|
|
#define SMS_IMAGEWIDTH_OFFSET 0
|
|
#define SMS_PH_OFFSET 8
|
|
#define SMS_PW_OFFSET 4
|
|
#define SMS_PS_OFFSET 0
|
|
|
|
#define VRFB_NUM_CTXS 12
|
|
/* bitmap of reserved contexts */
|
|
static unsigned long ctx_map;
|
|
|
|
static DEFINE_MUTEX(ctx_lock);
|
|
|
|
/*
|
|
* Access to this happens from client drivers or the PM core after wake-up.
|
|
* For the first case we require locking at the driver level, for the second
|
|
* we don't need locking, since no drivers will run until after the wake-up
|
|
* has finished.
|
|
*/
|
|
static struct {
|
|
u32 physical_ba;
|
|
u32 control;
|
|
u32 size;
|
|
} vrfb_hw_context[VRFB_NUM_CTXS];
|
|
|
|
static inline void restore_hw_context(int ctx)
|
|
{
|
|
omap2_sms_write_rot_control(vrfb_hw_context[ctx].control, ctx);
|
|
omap2_sms_write_rot_size(vrfb_hw_context[ctx].size, ctx);
|
|
omap2_sms_write_rot_physical_ba(vrfb_hw_context[ctx].physical_ba, ctx);
|
|
}
|
|
|
|
static u32 get_image_width_roundup(u16 width, u8 bytespp)
|
|
{
|
|
unsigned long stride = width * bytespp;
|
|
unsigned long ceil_pages_per_stride = (stride / VRFB_PAGE_WIDTH) +
|
|
(stride % VRFB_PAGE_WIDTH != 0);
|
|
|
|
return ceil_pages_per_stride * VRFB_PAGE_WIDTH / bytespp;
|
|
}
|
|
|
|
/*
|
|
* This the extra space needed in the VRFB physical area for VRFB to safely wrap
|
|
* any memory accesses to the invisible part of the virtual view to the physical
|
|
* area.
|
|
*/
|
|
static inline u32 get_extra_physical_size(u16 image_width_roundup, u8 bytespp)
|
|
{
|
|
return (OMAP_VRFB_LINE_LEN - image_width_roundup) * VRFB_PAGE_HEIGHT *
|
|
bytespp;
|
|
}
|
|
|
|
void omap_vrfb_restore_context(void)
|
|
{
|
|
int i;
|
|
unsigned long map = ctx_map;
|
|
|
|
for (i = ffs(map); i; i = ffs(map)) {
|
|
/* i=1..32 */
|
|
i--;
|
|
map &= ~(1 << i);
|
|
restore_hw_context(i);
|
|
}
|
|
}
|
|
|
|
void omap_vrfb_adjust_size(u16 *width, u16 *height,
|
|
u8 bytespp)
|
|
{
|
|
*width = ALIGN(*width * bytespp, VRFB_PAGE_WIDTH) / bytespp;
|
|
*height = ALIGN(*height, VRFB_PAGE_HEIGHT);
|
|
}
|
|
EXPORT_SYMBOL(omap_vrfb_adjust_size);
|
|
|
|
u32 omap_vrfb_min_phys_size(u16 width, u16 height, u8 bytespp)
|
|
{
|
|
unsigned long image_width_roundup = get_image_width_roundup(width,
|
|
bytespp);
|
|
|
|
if (image_width_roundup > OMAP_VRFB_LINE_LEN)
|
|
return 0;
|
|
|
|
return (width * height * bytespp) + get_extra_physical_size(
|
|
image_width_roundup, bytespp);
|
|
}
|
|
EXPORT_SYMBOL(omap_vrfb_min_phys_size);
|
|
|
|
u16 omap_vrfb_max_height(u32 phys_size, u16 width, u8 bytespp)
|
|
{
|
|
unsigned long image_width_roundup = get_image_width_roundup(width,
|
|
bytespp);
|
|
unsigned long height;
|
|
unsigned long extra;
|
|
|
|
if (image_width_roundup > OMAP_VRFB_LINE_LEN)
|
|
return 0;
|
|
|
|
extra = get_extra_physical_size(image_width_roundup, bytespp);
|
|
|
|
if (phys_size < extra)
|
|
return 0;
|
|
|
|
height = (phys_size - extra) / (width * bytespp);
|
|
|
|
/* Virtual views provided by VRFB are limited to 2048x2048. */
|
|
return min_t(unsigned long, height, 2048);
|
|
}
|
|
EXPORT_SYMBOL(omap_vrfb_max_height);
|
|
|
|
void omap_vrfb_setup(struct vrfb *vrfb, unsigned long paddr,
|
|
u16 width, u16 height,
|
|
unsigned bytespp, bool yuv_mode)
|
|
{
|
|
unsigned pixel_size_exp;
|
|
u16 vrfb_width;
|
|
u16 vrfb_height;
|
|
u8 ctx = vrfb->context;
|
|
u32 size;
|
|
u32 control;
|
|
|
|
DBG("omapfb_set_vrfb(%d, %lx, %dx%d, %d, %d)\n", ctx, paddr,
|
|
width, height, bytespp, yuv_mode);
|
|
|
|
/* For YUV2 and UYVY modes VRFB needs to handle pixels a bit
|
|
* differently. See TRM. */
|
|
if (yuv_mode) {
|
|
bytespp *= 2;
|
|
width /= 2;
|
|
}
|
|
|
|
if (bytespp == 4)
|
|
pixel_size_exp = 2;
|
|
else if (bytespp == 2)
|
|
pixel_size_exp = 1;
|
|
else
|
|
BUG();
|
|
|
|
vrfb_width = ALIGN(width * bytespp, VRFB_PAGE_WIDTH) / bytespp;
|
|
vrfb_height = ALIGN(height, VRFB_PAGE_HEIGHT);
|
|
|
|
DBG("vrfb w %u, h %u bytespp %d\n", vrfb_width, vrfb_height, bytespp);
|
|
|
|
size = vrfb_width << SMS_IMAGEWIDTH_OFFSET;
|
|
size |= vrfb_height << SMS_IMAGEHEIGHT_OFFSET;
|
|
|
|
control = pixel_size_exp << SMS_PS_OFFSET;
|
|
control |= VRFB_PAGE_WIDTH_EXP << SMS_PW_OFFSET;
|
|
control |= VRFB_PAGE_HEIGHT_EXP << SMS_PH_OFFSET;
|
|
|
|
vrfb_hw_context[ctx].physical_ba = paddr;
|
|
vrfb_hw_context[ctx].size = size;
|
|
vrfb_hw_context[ctx].control = control;
|
|
|
|
omap2_sms_write_rot_physical_ba(paddr, ctx);
|
|
omap2_sms_write_rot_size(size, ctx);
|
|
omap2_sms_write_rot_control(control, ctx);
|
|
|
|
DBG("vrfb offset pixels %d, %d\n",
|
|
vrfb_width - width, vrfb_height - height);
|
|
|
|
vrfb->xres = width;
|
|
vrfb->yres = height;
|
|
vrfb->xoffset = vrfb_width - width;
|
|
vrfb->yoffset = vrfb_height - height;
|
|
vrfb->bytespp = bytespp;
|
|
vrfb->yuv_mode = yuv_mode;
|
|
}
|
|
EXPORT_SYMBOL(omap_vrfb_setup);
|
|
|
|
int omap_vrfb_map_angle(struct vrfb *vrfb, u16 height, u8 rot)
|
|
{
|
|
unsigned long size = height * OMAP_VRFB_LINE_LEN * vrfb->bytespp;
|
|
|
|
vrfb->vaddr[rot] = ioremap_wc(vrfb->paddr[rot], size);
|
|
|
|
if (!vrfb->vaddr[rot]) {
|
|
printk(KERN_ERR "vrfb: ioremap failed\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
DBG("ioremapped vrfb area %d of size %lu into %p\n", rot, size,
|
|
vrfb->vaddr[rot]);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(omap_vrfb_map_angle);
|
|
|
|
void omap_vrfb_release_ctx(struct vrfb *vrfb)
|
|
{
|
|
int rot;
|
|
int ctx = vrfb->context;
|
|
|
|
if (ctx == 0xff)
|
|
return;
|
|
|
|
DBG("release ctx %d\n", ctx);
|
|
|
|
mutex_lock(&ctx_lock);
|
|
|
|
BUG_ON(!(ctx_map & (1 << ctx)));
|
|
|
|
clear_bit(ctx, &ctx_map);
|
|
|
|
for (rot = 0; rot < 4; ++rot) {
|
|
if (vrfb->paddr[rot]) {
|
|
release_mem_region(vrfb->paddr[rot], OMAP_VRFB_SIZE);
|
|
vrfb->paddr[rot] = 0;
|
|
}
|
|
}
|
|
|
|
vrfb->context = 0xff;
|
|
|
|
mutex_unlock(&ctx_lock);
|
|
}
|
|
EXPORT_SYMBOL(omap_vrfb_release_ctx);
|
|
|
|
int omap_vrfb_request_ctx(struct vrfb *vrfb)
|
|
{
|
|
int rot;
|
|
u32 paddr;
|
|
u8 ctx;
|
|
int r;
|
|
|
|
DBG("request ctx\n");
|
|
|
|
mutex_lock(&ctx_lock);
|
|
|
|
for (ctx = 0; ctx < VRFB_NUM_CTXS; ++ctx)
|
|
if ((ctx_map & (1 << ctx)) == 0)
|
|
break;
|
|
|
|
if (ctx == VRFB_NUM_CTXS) {
|
|
pr_err("vrfb: no free contexts\n");
|
|
r = -EBUSY;
|
|
goto out;
|
|
}
|
|
|
|
DBG("found free ctx %d\n", ctx);
|
|
|
|
set_bit(ctx, &ctx_map);
|
|
|
|
memset(vrfb, 0, sizeof(*vrfb));
|
|
|
|
vrfb->context = ctx;
|
|
|
|
for (rot = 0; rot < 4; ++rot) {
|
|
paddr = SMS_ROT_VIRT_BASE(ctx, rot);
|
|
if (!request_mem_region(paddr, OMAP_VRFB_SIZE, "vrfb")) {
|
|
pr_err("vrfb: failed to reserve VRFB "
|
|
"area for ctx %d, rotation %d\n",
|
|
ctx, rot * 90);
|
|
omap_vrfb_release_ctx(vrfb);
|
|
r = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
vrfb->paddr[rot] = paddr;
|
|
|
|
DBG("VRFB %d/%d: %lx\n", ctx, rot*90, vrfb->paddr[rot]);
|
|
}
|
|
|
|
r = 0;
|
|
out:
|
|
mutex_unlock(&ctx_lock);
|
|
return r;
|
|
}
|
|
EXPORT_SYMBOL(omap_vrfb_request_ctx);
|