From patchwork Tue Mar 29 03:35:56 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Damian Hobson-Garcia X-Patchwork-Id: 670612 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter1.kernel.org (8.14.4/8.14.3) with ESMTP id p2T3Zvc2019769 for ; Tue, 29 Mar 2011 03:35:58 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753774Ab1C2Df5 (ORCPT ); Mon, 28 Mar 2011 23:35:57 -0400 Received: from mailhost.igel.co.jp ([219.106.231.130]:46090 "EHLO mailhost.igel.co.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751856Ab1C2Dfz (ORCPT ); Mon, 28 Mar 2011 23:35:55 -0400 Received: from v400.hq.igel.co.jp (unknown [10.16.150.2]) by mailhost.igel.co.jp (Postfix) with ESMTP id 2384E960472; Tue, 29 Mar 2011 12:16:02 +0900 (JST) From: Damian Hobson-Garcia To: linux-sh@vger.kernel.org, linux-fbdev@vger.kernel.org, lethal@linux-sh.org Cc: magnus.damm@gmail.com, taki@igel.co.jp, matsu@igel.co.jp, Damian Hobson-Garcia Subject: [RFC][PATCH 1/3] sh_mobile_meram: MERAM framework for LCDC Date: Tue, 29 Mar 2011 12:35:56 +0900 Message-Id: <1301369758-18394-2-git-send-email-dhobsong@igel.co.jp> X-Mailer: git-send-email 1.7.1 In-Reply-To: <1301369758-18394-1-git-send-email-dhobsong@igel.co.jp> References: <1301369758-18394-1-git-send-email-dhobsong@igel.co.jp> Sender: linux-sh-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-sh@vger.kernel.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.6 (demeter1.kernel.org [140.211.167.41]); Tue, 29 Mar 2011 03:35:58 +0000 (UTC) diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig index e6a8d8c..b3f3990 100644 --- a/drivers/video/Kconfig +++ b/drivers/video/Kconfig @@ -1975,6 +1975,18 @@ 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 2ea44b6..8b83129 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 757665b..92366bd 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 @@ -564,6 +565,9 @@ 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 +602,63 @@ 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) { + 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 = cfg->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 +743,17 @@ 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 = cfg->meram_dev; + mdev->ops->meram_unregister(mdev, cfg); + ch->meram_enabled = 0; + } + } /* stop the lcdc */ @@ -875,9 +937,29 @@ 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 = cfg->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); diff --git a/drivers/video/sh_mobile_lcdcfb.h b/drivers/video/sh_mobile_lcdcfb.h index 4635eed..d6d9f37 100644 --- a/drivers/video/sh_mobile_lcdcfb.h +++ b/drivers/video/sh_mobile_lcdcfb.h @@ -38,6 +38,7 @@ struct sh_mobile_lcdc_chan { struct fb_var_screeninfo display_var; int use_count; 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 0000000..bd68f3d --- /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 0000000..82c54fb --- /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