sh_mobile_meram: MERAM framework for LCDC
Based on the patch by Takanari Hayama <taki@igel.co.jp> Adds support framework necessary to use Media RAM (MERAM) caching functionality with the LCDC. The MERAM is accessed through up to 4 Interconnect Buffers (ICBs). ICB numbers and MERAM address ranges to use are specified in by filling in the .meram_cfg member of the LCDC platform data Signed-off-by: Damian Hobson-Garcia <dhobsong@igel.co.jp> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Damian
Paul Mundt
parent
71a8638480
commit
7caa4342ca
8 changed files with 773 additions and 10 deletions
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@ -1986,6 +1986,18 @@ config FB_SH_MOBILE_HDMI
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---help---
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Driver for the on-chip SH-Mobile HDMI controller.
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config FB_SH_MOBILE_MERAM
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tristate "SuperH Mobile MERAM read ahead support for LCDC"
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depends on FB_SH_MOBILE_LCDC
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default y
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---help---
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Enable MERAM support for the SH-Mobile LCD controller.
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This will allow for caching of the framebuffer to provide more
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reliable access under heavy main memory bus traffic situations.
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Up to 4 memory channels can be configured, allowing 4 RGB or
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2 YCbCr framebuffers to be configured.
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config FB_TMIO
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tristate "Toshiba Mobile IO FrameBuffer support"
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depends on FB && MFD_CORE
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@ -130,6 +130,7 @@ obj-$(CONFIG_FB_UDL) += udlfb.o
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obj-$(CONFIG_FB_XILINX) += xilinxfb.o
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obj-$(CONFIG_SH_MIPI_DSI) += sh_mipi_dsi.o
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obj-$(CONFIG_FB_SH_MOBILE_HDMI) += sh_mobile_hdmi.o
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obj-$(CONFIG_FB_SH_MOBILE_MERAM) += sh_mobile_meram.o
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obj-$(CONFIG_FB_SH_MOBILE_LCDC) += sh_mobile_lcdcfb.o
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obj-$(CONFIG_FB_OMAP) += omap/
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obj-y += omap2/
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@ -27,6 +27,7 @@
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#include <asm/atomic.h>
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#include "sh_mobile_lcdcfb.h"
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#include "sh_mobile_meram.h"
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#define SIDE_B_OFFSET 0x1000
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#define MIRROR_OFFSET 0x2000
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@ -143,6 +144,7 @@ struct sh_mobile_lcdc_priv {
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unsigned long saved_shared_regs[NR_SHARED_REGS];
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int started;
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int forced_bpp; /* 2 channel LCDC must share bpp setting */
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struct sh_mobile_meram_info *meram_dev;
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};
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static bool banked(int reg_nr)
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@ -564,6 +566,9 @@ static int sh_mobile_lcdc_start(struct sh_mobile_lcdc_priv *priv)
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}
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for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
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unsigned long base_addr_y;
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unsigned long base_addr_c = 0;
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int pitch;
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ch = &priv->ch[k];
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if (!priv->ch[k].enabled)
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@ -598,16 +603,63 @@ static int sh_mobile_lcdc_start(struct sh_mobile_lcdc_priv *priv)
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}
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lcdc_write_chan(ch, LDDFR, tmp);
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/* point out our frame buffer */
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lcdc_write_chan(ch, LDSA1R, ch->info->fix.smem_start);
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if (ch->info->var.nonstd)
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lcdc_write_chan(ch, LDSA2R,
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ch->info->fix.smem_start +
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base_addr_y = ch->info->fix.smem_start;
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base_addr_c = base_addr_y +
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ch->info->var.xres *
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ch->info->var.yres_virtual);
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ch->info->var.yres_virtual;
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pitch = ch->info->fix.line_length;
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/* test if we can enable meram */
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if (ch->cfg.meram_cfg && priv->meram_dev) {
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struct sh_mobile_meram_cfg *cfg;
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struct sh_mobile_meram_info *mdev;
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unsigned long icb_addr_y, icb_addr_c;
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int icb_pitch;
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int pf;
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cfg = ch->cfg.meram_cfg;
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mdev = priv->meram_dev;
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/* we need to de-init configured ICBs before we
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* we can re-initialize them.
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*/
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if (ch->meram_enabled)
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mdev->ops->meram_unregister(mdev, cfg);
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ch->meram_enabled = 0;
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if (ch->info->var.nonstd)
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pf = SH_MOBILE_MERAM_PF_NV;
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else
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pf = SH_MOBILE_MERAM_PF_RGB;
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ret = mdev->ops->meram_register(mdev, cfg, pitch,
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ch->info->var.yres,
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pf,
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base_addr_y,
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base_addr_c,
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&icb_addr_y,
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&icb_addr_c,
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&icb_pitch);
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if (!ret) {
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/* set LDSA1R value */
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base_addr_y = icb_addr_y;
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pitch = icb_pitch;
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/* set LDSA2R value if required */
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if (base_addr_c)
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base_addr_c = icb_addr_c;
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ch->meram_enabled = 1;
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}
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}
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/* point out our frame buffer */
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lcdc_write_chan(ch, LDSA1R, base_addr_y);
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if (ch->info->var.nonstd)
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lcdc_write_chan(ch, LDSA2R, base_addr_c);
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/* set line size */
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lcdc_write_chan(ch, LDMLSR, ch->info->fix.line_length);
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lcdc_write_chan(ch, LDMLSR, pitch);
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/* setup deferred io if SYS bus */
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tmp = ch->cfg.sys_bus_cfg.deferred_io_msec;
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@ -692,6 +744,17 @@ static void sh_mobile_lcdc_stop(struct sh_mobile_lcdc_priv *priv)
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board_cfg->display_off(board_cfg->board_data);
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module_put(board_cfg->owner);
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}
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/* disable the meram */
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if (ch->meram_enabled) {
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struct sh_mobile_meram_cfg *cfg;
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struct sh_mobile_meram_info *mdev;
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cfg = ch->cfg.meram_cfg;
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mdev = priv->meram_dev;
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mdev->ops->meram_unregister(mdev, cfg);
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ch->meram_enabled = 0;
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}
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}
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/* stop the lcdc */
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@ -875,9 +938,29 @@ static int sh_mobile_fb_pan_display(struct fb_var_screeninfo *var,
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} else
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base_addr_c = 0;
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lcdc_write_chan_mirror(ch, LDSA1R, base_addr_y);
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if (base_addr_c)
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lcdc_write_chan_mirror(ch, LDSA2R, base_addr_c);
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if (!ch->meram_enabled) {
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lcdc_write_chan_mirror(ch, LDSA1R, base_addr_y);
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if (base_addr_c)
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lcdc_write_chan_mirror(ch, LDSA2R, base_addr_c);
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} else {
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struct sh_mobile_meram_cfg *cfg;
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struct sh_mobile_meram_info *mdev;
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unsigned long icb_addr_y, icb_addr_c;
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int ret;
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cfg = ch->cfg.meram_cfg;
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mdev = priv->meram_dev;
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ret = mdev->ops->meram_update(mdev, cfg,
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base_addr_y, base_addr_c,
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&icb_addr_y, &icb_addr_c);
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if (ret)
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return ret;
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lcdc_write_chan_mirror(ch, LDSA1R, icb_addr_y);
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if (icb_addr_c)
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lcdc_write_chan_mirror(ch, LDSA2R, icb_addr_c);
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}
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if (lcdc_chan_is_sublcd(ch))
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lcdc_write(ch->lcdc, _LDRCNTR, ldrcntr ^ LDRCNTR_SRS);
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@ -1420,6 +1503,8 @@ static int __devinit sh_mobile_lcdc_probe(struct platform_device *pdev)
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goto err1;
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}
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priv->meram_dev = pdata->meram_dev;
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for (i = 0; i < j; i++) {
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struct fb_var_screeninfo *var;
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const struct fb_videomode *lcd_cfg, *max_cfg = NULL;
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@ -39,6 +39,7 @@ struct sh_mobile_lcdc_chan {
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int use_count;
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int blank_status;
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struct mutex open_lock; /* protects the use counter */
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int meram_enabled;
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};
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#endif
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553
drivers/video/sh_mobile_meram.c
Normal file
553
drivers/video/sh_mobile_meram.c
Normal file
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@ -0,0 +1,553 @@
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/*
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* SuperH Mobile MERAM Driver for SuperH Mobile LCDC Driver
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*
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* Copyright (c) 2011 Damian Hobson-Garcia <dhobsong@igel.co.jp>
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* Takanari Hayama <taki@igel.co.jp>
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/device.h>
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#include <linux/io.h>
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#include <linux/slab.h>
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#include <linux/platform_device.h>
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#include "sh_mobile_meram.h"
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/* meram registers */
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#define MExxCTL 0x0
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#define MExxBSIZE 0x4
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#define MExxMNCF 0x8
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#define MExxSARA 0x10
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#define MExxSARB 0x14
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#define MExxSBSIZE 0x18
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#define MERAM_MExxCTL_VAL(ctl, next_icb, addr) \
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((ctl) | (((next_icb) & 0x1f) << 11) | (((addr) & 0x7ff) << 16))
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#define MERAM_MExxBSIZE_VAL(a, b, c) \
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(((a) << 28) | ((b) << 16) | (c))
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#define MEVCR1 0x4
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#define MEACTS 0x10
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#define MEQSEL1 0x40
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#define MEQSEL2 0x44
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/* settings */
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#define MERAM_SEC_LINE 15
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#define MERAM_LINE_WIDTH 2048
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/*
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* MERAM/ICB access functions
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*/
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#define MERAM_ICB_OFFSET(base, idx, off) \
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((base) + (0x400 + ((idx) * 0x20) + (off)))
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static inline void meram_write_icb(void __iomem *base, int idx, int off,
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unsigned long val)
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{
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iowrite32(val, MERAM_ICB_OFFSET(base, idx, off));
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}
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static inline unsigned long meram_read_icb(void __iomem *base, int idx, int off)
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{
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return ioread32(MERAM_ICB_OFFSET(base, idx, off));
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}
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static inline void meram_write_reg(void __iomem *base, int off,
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unsigned long val)
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{
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iowrite32(val, base + off);
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}
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static inline unsigned long meram_read_reg(void __iomem *base, int off)
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{
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return ioread32(base + off);
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}
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/*
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* register ICB
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*/
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#define MERAM_CACHE_START(p) ((p) >> 16)
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#define MERAM_CACHE_END(p) ((p) & 0xffff)
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#define MERAM_CACHE_SET(o, s) ((((o) & 0xffff) << 16) | \
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(((o) + (s) - 1) & 0xffff))
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/*
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* check if there's no overlaps in MERAM allocation.
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*/
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static inline int meram_check_overlap(struct sh_mobile_meram_priv *priv,
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struct sh_mobile_meram_icb *new)
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{
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int i;
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int used_start, used_end, meram_start, meram_end;
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/* valid ICB? */
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if (new->marker_icb & ~0x1f || new->cache_icb & ~0x1f)
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return 1;
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if (test_bit(new->marker_icb, &priv->used_icb) ||
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test_bit(new->cache_icb, &priv->used_icb))
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return 1;
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for (i = 0; i < priv->used_meram_cache_regions; i++) {
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used_start = MERAM_CACHE_START(priv->used_meram_cache[i]);
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used_end = MERAM_CACHE_END(priv->used_meram_cache[i]);
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meram_start = new->meram_offset;
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meram_end = new->meram_offset + new->meram_size;
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if ((meram_start >= used_start && meram_start < used_end) ||
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(meram_end > used_start && meram_end < used_end))
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return 1;
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}
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return 0;
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}
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/*
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* mark the specified ICB as used
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*/
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static inline void meram_mark(struct sh_mobile_meram_priv *priv,
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struct sh_mobile_meram_icb *new)
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{
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int n;
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if (new->marker_icb < 0 || new->cache_icb < 0)
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return;
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__set_bit(new->marker_icb, &priv->used_icb);
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__set_bit(new->cache_icb, &priv->used_icb);
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n = priv->used_meram_cache_regions;
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priv->used_meram_cache[n] = MERAM_CACHE_SET(new->meram_offset,
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new->meram_size);
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priv->used_meram_cache_regions++;
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}
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/*
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* unmark the specified ICB as used
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*/
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static inline void meram_unmark(struct sh_mobile_meram_priv *priv,
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struct sh_mobile_meram_icb *icb)
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{
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int i;
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unsigned long pattern;
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if (icb->marker_icb < 0 || icb->cache_icb < 0)
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return;
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__clear_bit(icb->marker_icb, &priv->used_icb);
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__clear_bit(icb->cache_icb, &priv->used_icb);
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pattern = MERAM_CACHE_SET(icb->meram_offset, icb->meram_size);
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for (i = 0; i < priv->used_meram_cache_regions; i++) {
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if (priv->used_meram_cache[i] == pattern) {
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while (i < priv->used_meram_cache_regions - 1) {
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priv->used_meram_cache[i] =
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priv->used_meram_cache[i + 1] ;
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i++;
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}
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priv->used_meram_cache[i] = 0;
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priv->used_meram_cache_regions--;
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break;
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}
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}
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}
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/*
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* set the next address to fetch
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*/
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static inline void meram_set_next_addr(struct sh_mobile_meram_priv *priv,
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struct sh_mobile_meram_cfg *cfg,
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unsigned long base_addr_y,
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unsigned long base_addr_c)
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{
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unsigned long target;
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target = (cfg->current_reg) ? MExxSARA : MExxSARB;
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cfg->current_reg ^= 1;
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/* set the next address to fetch */
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meram_write_icb(priv->base, cfg->icb[0].cache_icb, target,
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base_addr_y);
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meram_write_icb(priv->base, cfg->icb[0].marker_icb, target,
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base_addr_y + cfg->icb[0].cache_unit);
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if (cfg->pixelformat == SH_MOBILE_MERAM_PF_NV) {
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meram_write_icb(priv->base, cfg->icb[1].cache_icb, target,
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base_addr_c);
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meram_write_icb(priv->base, cfg->icb[1].marker_icb, target,
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base_addr_c + cfg->icb[1].cache_unit);
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}
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}
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/*
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* get the next ICB address
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*/
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static inline void meram_get_next_icb_addr(struct sh_mobile_meram_info *pdata,
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struct sh_mobile_meram_cfg *cfg,
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unsigned long *icb_addr_y,
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unsigned long *icb_addr_c)
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{
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unsigned long icb_offset;
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if (pdata->addr_mode == SH_MOBILE_MERAM_MODE0)
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icb_offset = 0x80000000 | (cfg->current_reg << 29);
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else
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icb_offset = 0xc0000000 | (cfg->current_reg << 23);
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*icb_addr_y = icb_offset | (cfg->icb[0].marker_icb << 24);
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if ((*icb_addr_c) && cfg->pixelformat == SH_MOBILE_MERAM_PF_NV)
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*icb_addr_c = icb_offset | (cfg->icb[1].marker_icb << 24);
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}
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#define MERAM_CALC_BYTECOUNT(x, y) \
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(((x) * (y) + (MERAM_LINE_WIDTH - 1)) & ~(MERAM_LINE_WIDTH - 1))
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/*
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* initialize MERAM
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*/
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static int meram_init(struct sh_mobile_meram_priv *priv,
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struct sh_mobile_meram_icb *icb,
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int xres, int yres, int *out_pitch)
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{
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unsigned long total_byte_count = MERAM_CALC_BYTECOUNT(xres, yres);
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unsigned long bnm;
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int lcdc_pitch, xpitch, line_cnt;
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int save_lines;
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/* adjust pitch to 1024, 2048, 4096 or 8192 */
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lcdc_pitch = (xres - 1) | 1023;
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lcdc_pitch = lcdc_pitch | (lcdc_pitch >> 1);
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lcdc_pitch = lcdc_pitch | (lcdc_pitch >> 2);
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lcdc_pitch += 1;
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/* derive settings */
|
||||
if (lcdc_pitch == 8192 && yres >= 1024) {
|
||||
lcdc_pitch = xpitch = MERAM_LINE_WIDTH;
|
||||
line_cnt = total_byte_count >> 11;
|
||||
*out_pitch = xres;
|
||||
save_lines = (icb->meram_size / 16 / MERAM_SEC_LINE);
|
||||
save_lines *= MERAM_SEC_LINE;
|
||||
} else {
|
||||
xpitch = xres;
|
||||
line_cnt = yres;
|
||||
*out_pitch = lcdc_pitch;
|
||||
save_lines = icb->meram_size / (lcdc_pitch >> 10) / 2;
|
||||
save_lines &= 0xff;
|
||||
}
|
||||
bnm = (save_lines - 1) << 16;
|
||||
|
||||
/* TODO: we better to check if we have enough MERAM buffer size */
|
||||
|
||||
/* set up ICB */
|
||||
meram_write_icb(priv->base, icb->cache_icb, MExxBSIZE,
|
||||
MERAM_MExxBSIZE_VAL(0x0, line_cnt - 1, xpitch - 1));
|
||||
meram_write_icb(priv->base, icb->marker_icb, MExxBSIZE,
|
||||
MERAM_MExxBSIZE_VAL(0xf, line_cnt - 1, xpitch - 1));
|
||||
|
||||
meram_write_icb(priv->base, icb->cache_icb, MExxMNCF, bnm);
|
||||
meram_write_icb(priv->base, icb->marker_icb, MExxMNCF, bnm);
|
||||
|
||||
meram_write_icb(priv->base, icb->cache_icb, MExxSBSIZE, xpitch);
|
||||
meram_write_icb(priv->base, icb->marker_icb, MExxSBSIZE, xpitch);
|
||||
|
||||
/* save a cache unit size */
|
||||
icb->cache_unit = xres * save_lines;
|
||||
|
||||
/*
|
||||
* Set MERAM for framebuffer
|
||||
*
|
||||
* 0x70f: WD = 0x3, WS=0x1, CM=0x1, MD=FB mode
|
||||
* we also chain the cache_icb and the marker_icb.
|
||||
* we also split the allocated MERAM buffer between two ICBs.
|
||||
*/
|
||||
meram_write_icb(priv->base, icb->cache_icb, MExxCTL,
|
||||
MERAM_MExxCTL_VAL(0x70f, icb->marker_icb,
|
||||
icb->meram_offset));
|
||||
meram_write_icb(priv->base, icb->marker_icb, MExxCTL,
|
||||
MERAM_MExxCTL_VAL(0x70f, icb->cache_icb,
|
||||
icb->meram_offset +
|
||||
icb->meram_size / 2));
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void meram_deinit(struct sh_mobile_meram_priv *priv,
|
||||
struct sh_mobile_meram_icb *icb)
|
||||
{
|
||||
/* disable ICB */
|
||||
meram_write_icb(priv->base, icb->cache_icb, MExxCTL, 0);
|
||||
meram_write_icb(priv->base, icb->marker_icb, MExxCTL, 0);
|
||||
icb->cache_unit = 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* register the ICB
|
||||
*/
|
||||
|
||||
static int sh_mobile_meram_register(struct sh_mobile_meram_info *pdata,
|
||||
struct sh_mobile_meram_cfg *cfg,
|
||||
int xres, int yres, int pixelformat,
|
||||
unsigned long base_addr_y,
|
||||
unsigned long base_addr_c,
|
||||
unsigned long *icb_addr_y,
|
||||
unsigned long *icb_addr_c,
|
||||
int *pitch)
|
||||
{
|
||||
struct platform_device *pdev;
|
||||
struct sh_mobile_meram_priv *priv;
|
||||
int n, out_pitch;
|
||||
int error = 0;
|
||||
|
||||
if (!pdata || !pdata->priv || !pdata->pdev || !cfg)
|
||||
return -EINVAL;
|
||||
|
||||
if (pixelformat != SH_MOBILE_MERAM_PF_NV &&
|
||||
pixelformat != SH_MOBILE_MERAM_PF_RGB)
|
||||
return -EINVAL;
|
||||
|
||||
priv = pdata->priv;
|
||||
pdev = pdata->pdev;
|
||||
|
||||
dev_dbg(&pdev->dev, "registering %dx%d (%s) (y=%08lx, c=%08lx)",
|
||||
xres, yres, (!pixelformat) ? "yuv" : "rgb",
|
||||
base_addr_y, base_addr_c);
|
||||
|
||||
mutex_lock(&priv->lock);
|
||||
|
||||
/* we can't handle wider than 8192px */
|
||||
if (xres > 8192) {
|
||||
dev_err(&pdev->dev, "width exceeding the limit (> 8192).");
|
||||
error = -EINVAL;
|
||||
goto err;
|
||||
}
|
||||
|
||||
if (priv->used_meram_cache_regions + 2 > SH_MOBILE_MERAM_ICB_NUM) {
|
||||
dev_err(&pdev->dev, "no more ICB available.");
|
||||
error = -EINVAL;
|
||||
goto err;
|
||||
}
|
||||
|
||||
/* do we have at least one ICB config? */
|
||||
if (cfg->icb[0].marker_icb < 0 || cfg->icb[0].cache_icb < 0) {
|
||||
dev_err(&pdev->dev, "at least one ICB is required.");
|
||||
error = -EINVAL;
|
||||
goto err;
|
||||
}
|
||||
|
||||
/* make sure that there's no overlaps */
|
||||
if (meram_check_overlap(priv, &cfg->icb[0])) {
|
||||
dev_err(&pdev->dev, "conflicting config detected.");
|
||||
error = -EINVAL;
|
||||
goto err;
|
||||
}
|
||||
n = 1;
|
||||
|
||||
/* do the same if we have the second ICB set */
|
||||
if (cfg->icb[1].marker_icb >= 0 && cfg->icb[1].cache_icb >= 0) {
|
||||
if (meram_check_overlap(priv, &cfg->icb[1])) {
|
||||
dev_err(&pdev->dev, "conflicting config detected.");
|
||||
error = -EINVAL;
|
||||
goto err;
|
||||
}
|
||||
n = 2;
|
||||
}
|
||||
|
||||
if (pixelformat == SH_MOBILE_MERAM_PF_NV && n != 2) {
|
||||
dev_err(&pdev->dev, "requires two ICB sets for planar Y/C.");
|
||||
error = -EINVAL;
|
||||
goto err;
|
||||
}
|
||||
|
||||
/* we now register the ICB */
|
||||
cfg->pixelformat = pixelformat;
|
||||
meram_mark(priv, &cfg->icb[0]);
|
||||
if (pixelformat == SH_MOBILE_MERAM_PF_NV)
|
||||
meram_mark(priv, &cfg->icb[1]);
|
||||
|
||||
/* initialize MERAM */
|
||||
meram_init(priv, &cfg->icb[0], xres, yres, &out_pitch);
|
||||
*pitch = out_pitch;
|
||||
if (pixelformat == SH_MOBILE_MERAM_PF_NV)
|
||||
meram_init(priv, &cfg->icb[1], xres, (yres + 1) / 2,
|
||||
&out_pitch);
|
||||
|
||||
cfg->current_reg = 1;
|
||||
meram_set_next_addr(priv, cfg, base_addr_y, base_addr_c);
|
||||
meram_get_next_icb_addr(pdata, cfg, icb_addr_y, icb_addr_c);
|
||||
|
||||
dev_dbg(&pdev->dev, "registered - can access via y=%08lx, c=%08lx",
|
||||
*icb_addr_y, *icb_addr_c);
|
||||
|
||||
err:
|
||||
mutex_unlock(&priv->lock);
|
||||
return error;
|
||||
}
|
||||
|
||||
static int sh_mobile_meram_unregister(struct sh_mobile_meram_info *pdata,
|
||||
struct sh_mobile_meram_cfg *cfg)
|
||||
{
|
||||
struct sh_mobile_meram_priv *priv;
|
||||
|
||||
if (!pdata || !pdata->priv || !cfg)
|
||||
return -EINVAL;
|
||||
|
||||
priv = pdata->priv;
|
||||
|
||||
mutex_lock(&priv->lock);
|
||||
|
||||
/* deinit & unmark */
|
||||
if (cfg->pixelformat == SH_MOBILE_MERAM_PF_NV) {
|
||||
meram_deinit(priv, &cfg->icb[1]);
|
||||
meram_unmark(priv, &cfg->icb[1]);
|
||||
}
|
||||
meram_deinit(priv, &cfg->icb[0]);
|
||||
meram_unmark(priv, &cfg->icb[0]);
|
||||
|
||||
mutex_unlock(&priv->lock);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int sh_mobile_meram_update(struct sh_mobile_meram_info *pdata,
|
||||
struct sh_mobile_meram_cfg *cfg,
|
||||
unsigned long base_addr_y,
|
||||
unsigned long base_addr_c,
|
||||
unsigned long *icb_addr_y,
|
||||
unsigned long *icb_addr_c)
|
||||
{
|
||||
struct sh_mobile_meram_priv *priv;
|
||||
|
||||
if (!pdata || !pdata->priv || !cfg)
|
||||
return -EINVAL;
|
||||
|
||||
priv = pdata->priv;
|
||||
|
||||
mutex_lock(&priv->lock);
|
||||
|
||||
meram_set_next_addr(priv, cfg, base_addr_y, base_addr_c);
|
||||
meram_get_next_icb_addr(pdata, cfg, icb_addr_y, icb_addr_c);
|
||||
|
||||
mutex_unlock(&priv->lock);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct sh_mobile_meram_ops sh_mobile_meram_ops = {
|
||||
.module = THIS_MODULE,
|
||||
.meram_register = sh_mobile_meram_register,
|
||||
.meram_unregister = sh_mobile_meram_unregister,
|
||||
.meram_update = sh_mobile_meram_update,
|
||||
};
|
||||
|
||||
/*
|
||||
* initialize MERAM
|
||||
*/
|
||||
|
||||
static int sh_mobile_meram_remove(struct platform_device *pdev);
|
||||
|
||||
static int __devinit sh_mobile_meram_probe(struct platform_device *pdev)
|
||||
{
|
||||
struct sh_mobile_meram_priv *priv;
|
||||
struct sh_mobile_meram_info *pdata = pdev->dev.platform_data;
|
||||
struct resource *res;
|
||||
int error;
|
||||
|
||||
if (!pdata) {
|
||||
dev_err(&pdev->dev, "no platform data defined\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
||||
if (!res) {
|
||||
dev_err(&pdev->dev, "cannot get platform resources\n");
|
||||
return -ENOENT;
|
||||
}
|
||||
|
||||
priv = kzalloc(sizeof(*priv), GFP_KERNEL);
|
||||
if (!priv) {
|
||||
dev_err(&pdev->dev, "cannot allocate device data\n");
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
platform_set_drvdata(pdev, priv);
|
||||
|
||||
/* initialize private data */
|
||||
mutex_init(&priv->lock);
|
||||
priv->base = ioremap_nocache(res->start, resource_size(res));
|
||||
if (!priv->base) {
|
||||
dev_err(&pdev->dev, "ioremap failed\n");
|
||||
error = -EFAULT;
|
||||
goto err;
|
||||
}
|
||||
pdata->ops = &sh_mobile_meram_ops;
|
||||
pdata->priv = priv;
|
||||
pdata->pdev = pdev;
|
||||
|
||||
/* initialize ICB addressing mode */
|
||||
if (pdata->addr_mode == SH_MOBILE_MERAM_MODE1)
|
||||
meram_write_reg(priv->base, MEVCR1, 1 << 29);
|
||||
|
||||
dev_info(&pdev->dev, "sh_mobile_meram initialized.");
|
||||
|
||||
return 0;
|
||||
|
||||
err:
|
||||
sh_mobile_meram_remove(pdev);
|
||||
|
||||
return error;
|
||||
}
|
||||
|
||||
|
||||
static int sh_mobile_meram_remove(struct platform_device *pdev)
|
||||
{
|
||||
struct sh_mobile_meram_priv *priv = platform_get_drvdata(pdev);
|
||||
|
||||
if (priv->base)
|
||||
iounmap(priv->base);
|
||||
|
||||
mutex_destroy(&priv->lock);
|
||||
|
||||
kfree(priv);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct platform_driver sh_mobile_meram_driver = {
|
||||
.driver = {
|
||||
.name = "sh_mobile_meram",
|
||||
.owner = THIS_MODULE,
|
||||
},
|
||||
.probe = sh_mobile_meram_probe,
|
||||
.remove = sh_mobile_meram_remove,
|
||||
};
|
||||
|
||||
static int __init sh_mobile_meram_init(void)
|
||||
{
|
||||
return platform_driver_register(&sh_mobile_meram_driver);
|
||||
}
|
||||
|
||||
static void __exit sh_mobile_meram_exit(void)
|
||||
{
|
||||
platform_driver_unregister(&sh_mobile_meram_driver);
|
||||
}
|
||||
|
||||
module_init(sh_mobile_meram_init);
|
||||
module_exit(sh_mobile_meram_exit);
|
||||
|
||||
MODULE_DESCRIPTION("SuperH Mobile MERAM driver");
|
||||
MODULE_AUTHOR("Damian Hobson-Garcia / Takanari Hayama");
|
||||
MODULE_LICENSE("GPL v2");
|
||||
41
drivers/video/sh_mobile_meram.h
Normal file
41
drivers/video/sh_mobile_meram.h
Normal file
|
|
@ -0,0 +1,41 @@
|
|||
#ifndef __sh_mobile_meram_h__
|
||||
#define __sh_mobile_meram_h__
|
||||
|
||||
#include <linux/mutex.h>
|
||||
#include <video/sh_mobile_meram.h>
|
||||
|
||||
/*
|
||||
* MERAM private
|
||||
*/
|
||||
|
||||
#define MERAM_ICB_Y 0x1
|
||||
#define MERAM_ICB_C 0x2
|
||||
|
||||
/* MERAM cache size */
|
||||
#define SH_MOBILE_MERAM_ICB_NUM 32
|
||||
|
||||
#define SH_MOBILE_MERAM_CACHE_OFFSET(p) ((p) >> 16)
|
||||
#define SH_MOBILE_MERAM_CACHE_SIZE(p) ((p) & 0xffff)
|
||||
|
||||
struct sh_mobile_meram_priv {
|
||||
void __iomem *base;
|
||||
struct mutex lock;
|
||||
unsigned long used_icb;
|
||||
int used_meram_cache_regions;
|
||||
unsigned long used_meram_cache[SH_MOBILE_MERAM_ICB_NUM];
|
||||
};
|
||||
|
||||
int sh_mobile_meram_alloc_icb(const struct sh_mobile_meram_cfg *cfg,
|
||||
int xres,
|
||||
int yres,
|
||||
unsigned int base_addr,
|
||||
int yuv_mode,
|
||||
int *marker_icb,
|
||||
int *out_pitch);
|
||||
|
||||
void sh_mobile_meram_free_icb(int marker_icb);
|
||||
|
||||
#define SH_MOBILE_MERAM_START(ind, ab) \
|
||||
(0xC0000000 | ((ab & 0x1) << 23) | ((ind & 0x1F) << 24))
|
||||
|
||||
#endif /* !__sh_mobile_meram_h__ */
|
||||
|
|
@ -2,6 +2,7 @@
|
|||
#define __ASM_SH_MOBILE_LCDC_H__
|
||||
|
||||
#include <linux/fb.h>
|
||||
#include <video/sh_mobile_meram.h>
|
||||
|
||||
enum {
|
||||
RGB8, /* 24bpp, 8:8:8 */
|
||||
|
|
@ -87,11 +88,13 @@ struct sh_mobile_lcdc_chan_cfg {
|
|||
struct sh_mobile_lcdc_bl_info bl_info;
|
||||
struct sh_mobile_lcdc_sys_bus_cfg sys_bus_cfg; /* only for SYSn I/F */
|
||||
int nonstd;
|
||||
struct sh_mobile_meram_cfg *meram_cfg;
|
||||
};
|
||||
|
||||
struct sh_mobile_lcdc_info {
|
||||
int clock_source;
|
||||
struct sh_mobile_lcdc_chan_cfg ch[2];
|
||||
struct sh_mobile_meram_info *meram_dev;
|
||||
};
|
||||
|
||||
#endif /* __ASM_SH_MOBILE_LCDC_H__ */
|
||||
|
|
|
|||
67
include/video/sh_mobile_meram.h
Normal file
67
include/video/sh_mobile_meram.h
Normal file
|
|
@ -0,0 +1,67 @@
|
|||
#ifndef __VIDEO_SH_MOBILE_MERAM_H__
|
||||
#define __VIDEO_SH_MOBILE_MERAM_H__
|
||||
|
||||
/* For sh_mobile_meram_info.addr_mode */
|
||||
enum {
|
||||
SH_MOBILE_MERAM_MODE0 = 0,
|
||||
SH_MOBILE_MERAM_MODE1
|
||||
};
|
||||
|
||||
enum {
|
||||
SH_MOBILE_MERAM_PF_NV = 0,
|
||||
SH_MOBILE_MERAM_PF_RGB
|
||||
};
|
||||
|
||||
|
||||
struct sh_mobile_meram_priv;
|
||||
struct sh_mobile_meram_ops;
|
||||
|
||||
struct sh_mobile_meram_info {
|
||||
int addr_mode;
|
||||
struct sh_mobile_meram_ops *ops;
|
||||
struct sh_mobile_meram_priv *priv;
|
||||
struct platform_device *pdev;
|
||||
};
|
||||
|
||||
/* icb config */
|
||||
struct sh_mobile_meram_icb {
|
||||
int marker_icb; /* ICB # for Marker ICB */
|
||||
int cache_icb; /* ICB # for Cache ICB */
|
||||
int meram_offset; /* MERAM Buffer Offset to use */
|
||||
int meram_size; /* MERAM Buffer Size to use */
|
||||
|
||||
int cache_unit; /* bytes to cache per ICB */
|
||||
};
|
||||
|
||||
struct sh_mobile_meram_cfg {
|
||||
struct sh_mobile_meram_icb icb[2];
|
||||
int pixelformat;
|
||||
int current_reg;
|
||||
};
|
||||
|
||||
struct module;
|
||||
struct sh_mobile_meram_ops {
|
||||
struct module *module;
|
||||
/* register usage of meram */
|
||||
int (*meram_register)(struct sh_mobile_meram_info *meram_dev,
|
||||
struct sh_mobile_meram_cfg *cfg,
|
||||
int xres, int yres, int pixelformat,
|
||||
unsigned long base_addr_y,
|
||||
unsigned long base_addr_c,
|
||||
unsigned long *icb_addr_y,
|
||||
unsigned long *icb_addr_c, int *pitch);
|
||||
|
||||
/* unregister usage of meram */
|
||||
int (*meram_unregister)(struct sh_mobile_meram_info *meram_dev,
|
||||
struct sh_mobile_meram_cfg *cfg);
|
||||
|
||||
/* update meram settings */
|
||||
int (*meram_update)(struct sh_mobile_meram_info *meram_dev,
|
||||
struct sh_mobile_meram_cfg *cfg,
|
||||
unsigned long base_addr_y,
|
||||
unsigned long base_addr_c,
|
||||
unsigned long *icb_addr_y,
|
||||
unsigned long *icb_addr_c);
|
||||
};
|
||||
|
||||
#endif /* __VIDEO_SH_MOBILE_MERAM_H__ */
|
||||
Loading…
Reference in a new issue