From 7caa4342ca5b37d2d178b464c16badd4228b3b7b Mon Sep 17 00:00:00 2001 From: Damian Date: Wed, 18 May 2011 11:10:07 +0000 Subject: sh_mobile_meram: MERAM framework for LCDC Based on the patch by Takanari Hayama 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 Signed-off-by: Paul Mundt --- drivers/video/Kconfig | 12 + drivers/video/Makefile | 1 + drivers/video/sh_mobile_lcdcfb.c | 103 +++++++- drivers/video/sh_mobile_lcdcfb.h | 1 + drivers/video/sh_mobile_meram.c | 553 +++++++++++++++++++++++++++++++++++++++ drivers/video/sh_mobile_meram.h | 41 +++ 6 files changed, 702 insertions(+), 9 deletions(-) create mode 100644 drivers/video/sh_mobile_meram.c create mode 100644 drivers/video/sh_mobile_meram.h (limited to 'drivers') diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig index 6d139679eb7a..a0282b133bcc 100644 --- a/drivers/video/Kconfig +++ b/drivers/video/Kconfig @@ -1986,6 +1986,18 @@ config FB_SH_MOBILE_HDMI ---help--- Driver for the on-chip SH-Mobile HDMI controller. +config FB_SH_MOBILE_MERAM + tristate "SuperH Mobile MERAM read ahead support for LCDC" + depends on FB_SH_MOBILE_LCDC + default y + ---help--- + Enable MERAM support for the SH-Mobile LCD controller. + + This will allow for caching of the framebuffer to provide more + reliable access under heavy main memory bus traffic situations. + Up to 4 memory channels can be configured, allowing 4 RGB or + 2 YCbCr framebuffers to be configured. + config FB_TMIO tristate "Toshiba Mobile IO FrameBuffer support" depends on FB && MFD_CORE diff --git a/drivers/video/Makefile b/drivers/video/Makefile index 2ea44b6625fe..8b83129e209c 100644 --- a/drivers/video/Makefile +++ b/drivers/video/Makefile @@ -130,6 +130,7 @@ obj-$(CONFIG_FB_UDL) += udlfb.o obj-$(CONFIG_FB_XILINX) += xilinxfb.o obj-$(CONFIG_SH_MIPI_DSI) += sh_mipi_dsi.o obj-$(CONFIG_FB_SH_MOBILE_HDMI) += sh_mobile_hdmi.o +obj-$(CONFIG_FB_SH_MOBILE_MERAM) += sh_mobile_meram.o obj-$(CONFIG_FB_SH_MOBILE_LCDC) += sh_mobile_lcdcfb.o obj-$(CONFIG_FB_OMAP) += omap/ obj-y += omap2/ diff --git a/drivers/video/sh_mobile_lcdcfb.c b/drivers/video/sh_mobile_lcdcfb.c index 9bcc61b4ef14..3a2cbd18f91b 100644 --- a/drivers/video/sh_mobile_lcdcfb.c +++ b/drivers/video/sh_mobile_lcdcfb.c @@ -27,6 +27,7 @@ #include #include "sh_mobile_lcdcfb.h" +#include "sh_mobile_meram.h" #define SIDE_B_OFFSET 0x1000 #define MIRROR_OFFSET 0x2000 @@ -143,6 +144,7 @@ struct sh_mobile_lcdc_priv { unsigned long saved_shared_regs[NR_SHARED_REGS]; int started; int forced_bpp; /* 2 channel LCDC must share bpp setting */ + struct sh_mobile_meram_info *meram_dev; }; static bool banked(int reg_nr) @@ -564,6 +566,9 @@ static int sh_mobile_lcdc_start(struct sh_mobile_lcdc_priv *priv) } for (k = 0; k < ARRAY_SIZE(priv->ch); k++) { + unsigned long base_addr_y; + unsigned long base_addr_c = 0; + int pitch; ch = &priv->ch[k]; if (!priv->ch[k].enabled) @@ -598,16 +603,63 @@ static int sh_mobile_lcdc_start(struct sh_mobile_lcdc_priv *priv) } lcdc_write_chan(ch, LDDFR, tmp); + base_addr_y = ch->info->fix.smem_start; + base_addr_c = base_addr_y + + ch->info->var.xres * + ch->info->var.yres_virtual; + pitch = ch->info->fix.line_length; + + /* test if we can enable meram */ + if (ch->cfg.meram_cfg && priv->meram_dev) { + struct sh_mobile_meram_cfg *cfg; + struct sh_mobile_meram_info *mdev; + unsigned long icb_addr_y, icb_addr_c; + int icb_pitch; + int pf; + + cfg = ch->cfg.meram_cfg; + mdev = priv->meram_dev; + /* we need to de-init configured ICBs before we + * we can re-initialize them. + */ + if (ch->meram_enabled) + mdev->ops->meram_unregister(mdev, cfg); + + ch->meram_enabled = 0; + + if (ch->info->var.nonstd) + pf = SH_MOBILE_MERAM_PF_NV; + else + pf = SH_MOBILE_MERAM_PF_RGB; + + ret = mdev->ops->meram_register(mdev, cfg, pitch, + ch->info->var.yres, + pf, + base_addr_y, + base_addr_c, + &icb_addr_y, + &icb_addr_c, + &icb_pitch); + if (!ret) { + /* set LDSA1R value */ + base_addr_y = icb_addr_y; + pitch = icb_pitch; + + /* set LDSA2R value if required */ + if (base_addr_c) + base_addr_c = icb_addr_c; + + ch->meram_enabled = 1; + } + } + /* point out our frame buffer */ - lcdc_write_chan(ch, LDSA1R, ch->info->fix.smem_start); + lcdc_write_chan(ch, LDSA1R, base_addr_y); if (ch->info->var.nonstd) - lcdc_write_chan(ch, LDSA2R, - ch->info->fix.smem_start + - ch->info->var.xres * - ch->info->var.yres_virtual); + lcdc_write_chan(ch, LDSA2R, base_addr_c); /* set line size */ - lcdc_write_chan(ch, LDMLSR, ch->info->fix.line_length); + lcdc_write_chan(ch, LDMLSR, pitch); /* setup deferred io if SYS bus */ tmp = ch->cfg.sys_bus_cfg.deferred_io_msec; @@ -692,6 +744,17 @@ static void sh_mobile_lcdc_stop(struct sh_mobile_lcdc_priv *priv) board_cfg->display_off(board_cfg->board_data); module_put(board_cfg->owner); } + + /* disable the meram */ + if (ch->meram_enabled) { + struct sh_mobile_meram_cfg *cfg; + struct sh_mobile_meram_info *mdev; + cfg = ch->cfg.meram_cfg; + mdev = priv->meram_dev; + mdev->ops->meram_unregister(mdev, cfg); + ch->meram_enabled = 0; + } + } /* stop the lcdc */ @@ -875,9 +938,29 @@ static int sh_mobile_fb_pan_display(struct fb_var_screeninfo *var, } else base_addr_c = 0; - lcdc_write_chan_mirror(ch, LDSA1R, base_addr_y); - if (base_addr_c) - lcdc_write_chan_mirror(ch, LDSA2R, base_addr_c); + if (!ch->meram_enabled) { + lcdc_write_chan_mirror(ch, LDSA1R, base_addr_y); + if (base_addr_c) + lcdc_write_chan_mirror(ch, LDSA2R, base_addr_c); + } else { + struct sh_mobile_meram_cfg *cfg; + struct sh_mobile_meram_info *mdev; + unsigned long icb_addr_y, icb_addr_c; + int ret; + + cfg = ch->cfg.meram_cfg; + mdev = priv->meram_dev; + ret = mdev->ops->meram_update(mdev, cfg, + base_addr_y, base_addr_c, + &icb_addr_y, &icb_addr_c); + if (ret) + return ret; + + lcdc_write_chan_mirror(ch, LDSA1R, icb_addr_y); + if (icb_addr_c) + lcdc_write_chan_mirror(ch, LDSA2R, icb_addr_c); + + } if (lcdc_chan_is_sublcd(ch)) lcdc_write(ch->lcdc, _LDRCNTR, ldrcntr ^ LDRCNTR_SRS); @@ -1420,6 +1503,8 @@ static int __devinit sh_mobile_lcdc_probe(struct platform_device *pdev) goto err1; } + priv->meram_dev = pdata->meram_dev; + for (i = 0; i < j; i++) { struct fb_var_screeninfo *var; const struct fb_videomode *lcd_cfg, *max_cfg = NULL; diff --git a/drivers/video/sh_mobile_lcdcfb.h b/drivers/video/sh_mobile_lcdcfb.h index f16cb5645a13..aeed6687e6a7 100644 --- a/drivers/video/sh_mobile_lcdcfb.h +++ b/drivers/video/sh_mobile_lcdcfb.h @@ -39,6 +39,7 @@ struct sh_mobile_lcdc_chan { int use_count; int blank_status; struct mutex open_lock; /* protects the use counter */ + int meram_enabled; }; #endif diff --git a/drivers/video/sh_mobile_meram.c b/drivers/video/sh_mobile_meram.c new file mode 100644 index 000000000000..bd68f3d43ab5 --- /dev/null +++ b/drivers/video/sh_mobile_meram.c @@ -0,0 +1,553 @@ +/* + * SuperH Mobile MERAM Driver for SuperH Mobile LCDC Driver + * + * Copyright (c) 2011 Damian Hobson-Garcia + * Takanari Hayama + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ + +#include +#include +#include +#include +#include +#include + +#include "sh_mobile_meram.h" + +/* meram registers */ +#define MExxCTL 0x0 +#define MExxBSIZE 0x4 +#define MExxMNCF 0x8 +#define MExxSARA 0x10 +#define MExxSARB 0x14 +#define MExxSBSIZE 0x18 + +#define MERAM_MExxCTL_VAL(ctl, next_icb, addr) \ + ((ctl) | (((next_icb) & 0x1f) << 11) | (((addr) & 0x7ff) << 16)) +#define MERAM_MExxBSIZE_VAL(a, b, c) \ + (((a) << 28) | ((b) << 16) | (c)) + +#define MEVCR1 0x4 +#define MEACTS 0x10 +#define MEQSEL1 0x40 +#define MEQSEL2 0x44 + +/* settings */ +#define MERAM_SEC_LINE 15 +#define MERAM_LINE_WIDTH 2048 + +/* + * MERAM/ICB access functions + */ + +#define MERAM_ICB_OFFSET(base, idx, off) \ + ((base) + (0x400 + ((idx) * 0x20) + (off))) + +static inline void meram_write_icb(void __iomem *base, int idx, int off, + unsigned long val) +{ + iowrite32(val, MERAM_ICB_OFFSET(base, idx, off)); +} + +static inline unsigned long meram_read_icb(void __iomem *base, int idx, int off) +{ + return ioread32(MERAM_ICB_OFFSET(base, idx, off)); +} + +static inline void meram_write_reg(void __iomem *base, int off, + unsigned long val) +{ + iowrite32(val, base + off); +} + +static inline unsigned long meram_read_reg(void __iomem *base, int off) +{ + return ioread32(base + off); +} + +/* + * register ICB + */ + +#define MERAM_CACHE_START(p) ((p) >> 16) +#define MERAM_CACHE_END(p) ((p) & 0xffff) +#define MERAM_CACHE_SET(o, s) ((((o) & 0xffff) << 16) | \ + (((o) + (s) - 1) & 0xffff)) + +/* + * check if there's no overlaps in MERAM allocation. + */ + +static inline int meram_check_overlap(struct sh_mobile_meram_priv *priv, + struct sh_mobile_meram_icb *new) +{ + int i; + int used_start, used_end, meram_start, meram_end; + + /* valid ICB? */ + if (new->marker_icb & ~0x1f || new->cache_icb & ~0x1f) + return 1; + + if (test_bit(new->marker_icb, &priv->used_icb) || + test_bit(new->cache_icb, &priv->used_icb)) + return 1; + + for (i = 0; i < priv->used_meram_cache_regions; i++) { + used_start = MERAM_CACHE_START(priv->used_meram_cache[i]); + used_end = MERAM_CACHE_END(priv->used_meram_cache[i]); + meram_start = new->meram_offset; + meram_end = new->meram_offset + new->meram_size; + + if ((meram_start >= used_start && meram_start < used_end) || + (meram_end > used_start && meram_end < used_end)) + return 1; + } + + return 0; +} + +/* + * mark the specified ICB as used + */ + +static inline void meram_mark(struct sh_mobile_meram_priv *priv, + struct sh_mobile_meram_icb *new) +{ + int n; + + if (new->marker_icb < 0 || new->cache_icb < 0) + return; + + __set_bit(new->marker_icb, &priv->used_icb); + __set_bit(new->cache_icb, &priv->used_icb); + + n = priv->used_meram_cache_regions; + + priv->used_meram_cache[n] = MERAM_CACHE_SET(new->meram_offset, + new->meram_size); + + priv->used_meram_cache_regions++; +} + +/* + * unmark the specified ICB as used + */ + +static inline void meram_unmark(struct sh_mobile_meram_priv *priv, + struct sh_mobile_meram_icb *icb) +{ + int i; + unsigned long pattern; + + if (icb->marker_icb < 0 || icb->cache_icb < 0) + return; + + __clear_bit(icb->marker_icb, &priv->used_icb); + __clear_bit(icb->cache_icb, &priv->used_icb); + + pattern = MERAM_CACHE_SET(icb->meram_offset, icb->meram_size); + for (i = 0; i < priv->used_meram_cache_regions; i++) { + if (priv->used_meram_cache[i] == pattern) { + while (i < priv->used_meram_cache_regions - 1) { + priv->used_meram_cache[i] = + priv->used_meram_cache[i + 1] ; + i++; + } + priv->used_meram_cache[i] = 0; + priv->used_meram_cache_regions--; + break; + } + } +} + + +/* + * set the next address to fetch + */ +static inline void meram_set_next_addr(struct sh_mobile_meram_priv *priv, + struct sh_mobile_meram_cfg *cfg, + unsigned long base_addr_y, + unsigned long base_addr_c) +{ + unsigned long target; + + target = (cfg->current_reg) ? MExxSARA : MExxSARB; + cfg->current_reg ^= 1; + + /* set the next address to fetch */ + meram_write_icb(priv->base, cfg->icb[0].cache_icb, target, + base_addr_y); + meram_write_icb(priv->base, cfg->icb[0].marker_icb, target, + base_addr_y + cfg->icb[0].cache_unit); + + if (cfg->pixelformat == SH_MOBILE_MERAM_PF_NV) { + meram_write_icb(priv->base, cfg->icb[1].cache_icb, target, + base_addr_c); + meram_write_icb(priv->base, cfg->icb[1].marker_icb, target, + base_addr_c + cfg->icb[1].cache_unit); + } +} + +/* + * get the next ICB address + */ +static inline void meram_get_next_icb_addr(struct sh_mobile_meram_info *pdata, + struct sh_mobile_meram_cfg *cfg, + unsigned long *icb_addr_y, + unsigned long *icb_addr_c) +{ + unsigned long icb_offset; + + if (pdata->addr_mode == SH_MOBILE_MERAM_MODE0) + icb_offset = 0x80000000 | (cfg->current_reg << 29); + else + icb_offset = 0xc0000000 | (cfg->current_reg << 23); + + *icb_addr_y = icb_offset | (cfg->icb[0].marker_icb << 24); + if ((*icb_addr_c) && cfg->pixelformat == SH_MOBILE_MERAM_PF_NV) + *icb_addr_c = icb_offset | (cfg->icb[1].marker_icb << 24); +} + +#define MERAM_CALC_BYTECOUNT(x, y) \ + (((x) * (y) + (MERAM_LINE_WIDTH - 1)) & ~(MERAM_LINE_WIDTH - 1)) + +/* + * initialize MERAM + */ + +static int meram_init(struct sh_mobile_meram_priv *priv, + struct sh_mobile_meram_icb *icb, + int xres, int yres, int *out_pitch) +{ + unsigned long total_byte_count = MERAM_CALC_BYTECOUNT(xres, yres); + unsigned long bnm; + int lcdc_pitch, xpitch, line_cnt; + int save_lines; + + /* adjust pitch to 1024, 2048, 4096 or 8192 */ + lcdc_pitch = (xres - 1) | 1023; + lcdc_pitch = lcdc_pitch | (lcdc_pitch >> 1); + lcdc_pitch = lcdc_pitch | (lcdc_pitch >> 2); + lcdc_pitch += 1; + + /* 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"); diff --git a/drivers/video/sh_mobile_meram.h b/drivers/video/sh_mobile_meram.h new file mode 100644 index 000000000000..82c54fbce8bd --- /dev/null +++ b/drivers/video/sh_mobile_meram.h @@ -0,0 +1,41 @@ +#ifndef __sh_mobile_meram_h__ +#define __sh_mobile_meram_h__ + +#include +#include