+++ /dev/null
-/*
- * SuperH Mobile MERAM Driver for SuperH Mobile LCDC Driver
- *
- * Copyright (c) 2011 Damian Hobson-Garcia <dhobsong@igel.co.jp>
- * Takanari Hayama <taki@igel.co.jp>
- *
- * 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 <linux/device.h>
-#include <linux/err.h>
-#include <linux/export.h>
-#include <linux/genalloc.h>
-#include <linux/io.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/platform_device.h>
-#include <linux/pm_runtime.h>
-#include <linux/slab.h>
-
-#include <video/sh_mobile_meram.h>
-
-/* -----------------------------------------------------------------------------
- * MERAM registers
- */
-
-#define MEVCR1 0x4
-#define MEVCR1_RST (1 << 31)
-#define MEVCR1_WD (1 << 30)
-#define MEVCR1_AMD1 (1 << 29)
-#define MEVCR1_AMD0 (1 << 28)
-#define MEQSEL1 0x40
-#define MEQSEL2 0x44
-
-#define MExxCTL 0x400
-#define MExxCTL_BV (1 << 31)
-#define MExxCTL_BSZ_SHIFT 28
-#define MExxCTL_MSAR_MASK (0x7ff << MExxCTL_MSAR_SHIFT)
-#define MExxCTL_MSAR_SHIFT 16
-#define MExxCTL_NXT_MASK (0x1f << MExxCTL_NXT_SHIFT)
-#define MExxCTL_NXT_SHIFT 11
-#define MExxCTL_WD1 (1 << 10)
-#define MExxCTL_WD0 (1 << 9)
-#define MExxCTL_WS (1 << 8)
-#define MExxCTL_CB (1 << 7)
-#define MExxCTL_WBF (1 << 6)
-#define MExxCTL_WF (1 << 5)
-#define MExxCTL_RF (1 << 4)
-#define MExxCTL_CM (1 << 3)
-#define MExxCTL_MD_READ (1 << 0)
-#define MExxCTL_MD_WRITE (2 << 0)
-#define MExxCTL_MD_ICB_WB (3 << 0)
-#define MExxCTL_MD_ICB (4 << 0)
-#define MExxCTL_MD_FB (7 << 0)
-#define MExxCTL_MD_MASK (7 << 0)
-#define MExxBSIZE 0x404
-#define MExxBSIZE_RCNT_SHIFT 28
-#define MExxBSIZE_YSZM1_SHIFT 16
-#define MExxBSIZE_XSZM1_SHIFT 0
-#define MExxMNCF 0x408
-#define MExxMNCF_KWBNM_SHIFT 28
-#define MExxMNCF_KRBNM_SHIFT 24
-#define MExxMNCF_BNM_SHIFT 16
-#define MExxMNCF_XBV (1 << 15)
-#define MExxMNCF_CPL_YCBCR444 (1 << 12)
-#define MExxMNCF_CPL_YCBCR420 (2 << 12)
-#define MExxMNCF_CPL_YCBCR422 (3 << 12)
-#define MExxMNCF_CPL_MSK (3 << 12)
-#define MExxMNCF_BL (1 << 2)
-#define MExxMNCF_LNM_SHIFT 0
-#define MExxSARA 0x410
-#define MExxSARB 0x414
-#define MExxSBSIZE 0x418
-#define MExxSBSIZE_HDV (1 << 31)
-#define MExxSBSIZE_HSZ16 (0 << 28)
-#define MExxSBSIZE_HSZ32 (1 << 28)
-#define MExxSBSIZE_HSZ64 (2 << 28)
-#define MExxSBSIZE_HSZ128 (3 << 28)
-#define MExxSBSIZE_SBSIZZ_SHIFT 0
-
-#define MERAM_MExxCTL_VAL(next, addr) \
- ((((next) << MExxCTL_NXT_SHIFT) & MExxCTL_NXT_MASK) | \
- (((addr) << MExxCTL_MSAR_SHIFT) & MExxCTL_MSAR_MASK))
-#define MERAM_MExxBSIZE_VAL(rcnt, yszm1, xszm1) \
- (((rcnt) << MExxBSIZE_RCNT_SHIFT) | \
- ((yszm1) << MExxBSIZE_YSZM1_SHIFT) | \
- ((xszm1) << MExxBSIZE_XSZM1_SHIFT))
-
-static const unsigned long common_regs[] = {
- MEVCR1,
- MEQSEL1,
- MEQSEL2,
-};
-#define MERAM_REGS_SIZE ARRAY_SIZE(common_regs)
-
-static const unsigned long icb_regs[] = {
- MExxCTL,
- MExxBSIZE,
- MExxMNCF,
- MExxSARA,
- MExxSARB,
- MExxSBSIZE,
-};
-#define ICB_REGS_SIZE ARRAY_SIZE(icb_regs)
-
-/*
- * sh_mobile_meram_icb - MERAM ICB information
- * @regs: Registers cache
- * @index: ICB index
- * @offset: MERAM block offset
- * @size: MERAM block size in KiB
- * @cache_unit: Bytes to cache per ICB
- * @pixelformat: Video pixel format of the data stored in the ICB
- * @current_reg: Which of Start Address Register A (0) or B (1) is in use
- */
-struct sh_mobile_meram_icb {
- unsigned long regs[ICB_REGS_SIZE];
- unsigned int index;
- unsigned long offset;
- unsigned int size;
-
- unsigned int cache_unit;
- unsigned int pixelformat;
- unsigned int current_reg;
-};
-
-#define MERAM_ICB_NUM 32
-
-struct sh_mobile_meram_fb_plane {
- struct sh_mobile_meram_icb *marker;
- struct sh_mobile_meram_icb *cache;
-};
-
-struct sh_mobile_meram_fb_cache {
- unsigned int nplanes;
- struct sh_mobile_meram_fb_plane planes[2];
-};
-
-/*
- * sh_mobile_meram_priv - MERAM device
- * @base: Registers base address
- * @meram: MERAM physical address
- * @regs: Registers cache
- * @lock: Protects used_icb and icbs
- * @used_icb: Bitmask of used ICBs
- * @icbs: ICBs
- * @pool: Allocation pool to manage the MERAM
- */
-struct sh_mobile_meram_priv {
- void __iomem *base;
- unsigned long meram;
- unsigned long regs[MERAM_REGS_SIZE];
-
- struct mutex lock;
- unsigned long used_icb;
- struct sh_mobile_meram_icb icbs[MERAM_ICB_NUM];
-
- struct gen_pool *pool;
-};
-
-/* settings */
-#define MERAM_GRANULARITY 1024
-#define MERAM_SEC_LINE 15
-#define MERAM_LINE_WIDTH 2048
-
-/* -----------------------------------------------------------------------------
- * Registers access
- */
-
-#define MERAM_ICB_OFFSET(base, idx, off) ((base) + (off) + (idx) * 0x20)
-
-static inline void meram_write_icb(void __iomem *base, unsigned int idx,
- unsigned int off, unsigned long val)
-{
- iowrite32(val, MERAM_ICB_OFFSET(base, idx, off));
-}
-
-static inline unsigned long meram_read_icb(void __iomem *base, unsigned int idx,
- unsigned int off)
-{
- return ioread32(MERAM_ICB_OFFSET(base, idx, off));
-}
-
-static inline void meram_write_reg(void __iomem *base, unsigned int off,
- unsigned long val)
-{
- iowrite32(val, base + off);
-}
-
-static inline unsigned long meram_read_reg(void __iomem *base, unsigned int off)
-{
- return ioread32(base + off);
-}
-
-/* -----------------------------------------------------------------------------
- * MERAM allocation and free
- */
-
-static unsigned long meram_alloc(struct sh_mobile_meram_priv *priv, size_t size)
-{
- return gen_pool_alloc(priv->pool, size);
-}
-
-static void meram_free(struct sh_mobile_meram_priv *priv, unsigned long mem,
- size_t size)
-{
- gen_pool_free(priv->pool, mem, size);
-}
-
-/* -----------------------------------------------------------------------------
- * LCDC cache planes allocation, init, cleanup and free
- */
-
-/* Allocate ICBs and MERAM for a plane. */
-static int meram_plane_alloc(struct sh_mobile_meram_priv *priv,
- struct sh_mobile_meram_fb_plane *plane,
- size_t size)
-{
- unsigned long mem;
- unsigned long idx;
-
- idx = find_first_zero_bit(&priv->used_icb, 28);
- if (idx == 28)
- return -ENOMEM;
- plane->cache = &priv->icbs[idx];
-
- idx = find_next_zero_bit(&priv->used_icb, 32, 28);
- if (idx == 32)
- return -ENOMEM;
- plane->marker = &priv->icbs[idx];
-
- mem = meram_alloc(priv, size * 1024);
- if (mem == 0)
- return -ENOMEM;
-
- __set_bit(plane->marker->index, &priv->used_icb);
- __set_bit(plane->cache->index, &priv->used_icb);
-
- plane->marker->offset = mem - priv->meram;
- plane->marker->size = size;
-
- return 0;
-}
-
-/* Free ICBs and MERAM for a plane. */
-static void meram_plane_free(struct sh_mobile_meram_priv *priv,
- struct sh_mobile_meram_fb_plane *plane)
-{
- meram_free(priv, priv->meram + plane->marker->offset,
- plane->marker->size * 1024);
-
- __clear_bit(plane->marker->index, &priv->used_icb);
- __clear_bit(plane->cache->index, &priv->used_icb);
-}
-
-/* Is this a YCbCr(NV12, NV16 or NV24) colorspace? */
-static int is_nvcolor(int cspace)
-{
- if (cspace == SH_MOBILE_MERAM_PF_NV ||
- cspace == SH_MOBILE_MERAM_PF_NV24)
- return 1;
- return 0;
-}
-
-/* Set the next address to fetch. */
-static void meram_set_next_addr(struct sh_mobile_meram_priv *priv,
- struct sh_mobile_meram_fb_cache *cache,
- unsigned long base_addr_y,
- unsigned long base_addr_c)
-{
- struct sh_mobile_meram_icb *icb = cache->planes[0].marker;
- unsigned long target;
-
- icb->current_reg ^= 1;
- target = icb->current_reg ? MExxSARB : MExxSARA;
-
- /* set the next address to fetch */
- meram_write_icb(priv->base, cache->planes[0].cache->index, target,
- base_addr_y);
- meram_write_icb(priv->base, cache->planes[0].marker->index, target,
- base_addr_y + cache->planes[0].marker->cache_unit);
-
- if (cache->nplanes == 2) {
- meram_write_icb(priv->base, cache->planes[1].cache->index,
- target, base_addr_c);
- meram_write_icb(priv->base, cache->planes[1].marker->index,
- target, base_addr_c +
- cache->planes[1].marker->cache_unit);
- }
-}
-
-/* Get the next ICB address. */
-static void
-meram_get_next_icb_addr(struct sh_mobile_meram_info *pdata,
- struct sh_mobile_meram_fb_cache *cache,
- unsigned long *icb_addr_y, unsigned long *icb_addr_c)
-{
- struct sh_mobile_meram_icb *icb = cache->planes[0].marker;
- unsigned long icb_offset;
-
- if (pdata->addr_mode == SH_MOBILE_MERAM_MODE0)
- icb_offset = 0x80000000 | (icb->current_reg << 29);
- else
- icb_offset = 0xc0000000 | (icb->current_reg << 23);
-
- *icb_addr_y = icb_offset | (cache->planes[0].marker->index << 24);
- if (cache->nplanes == 2)
- *icb_addr_c = icb_offset
- | (cache->planes[1].marker->index << 24);
-}
-
-#define MERAM_CALC_BYTECOUNT(x, y) \
- (((x) * (y) + (MERAM_LINE_WIDTH - 1)) & ~(MERAM_LINE_WIDTH - 1))
-
-/* Initialize MERAM. */
-static int meram_plane_init(struct sh_mobile_meram_priv *priv,
- struct sh_mobile_meram_fb_plane *plane,
- unsigned int xres, unsigned int yres,
- unsigned int *out_pitch)
-{
- struct sh_mobile_meram_icb *marker = plane->marker;
- unsigned long total_byte_count = MERAM_CALC_BYTECOUNT(xres, yres);
- unsigned long bnm;
- unsigned int lcdc_pitch;
- unsigned int xpitch;
- unsigned int line_cnt;
- unsigned 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 = plane->marker->size / 16 / MERAM_SEC_LINE;
- save_lines *= MERAM_SEC_LINE;
- } else {
- xpitch = xres;
- line_cnt = yres;
- *out_pitch = lcdc_pitch;
- save_lines = plane->marker->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, plane->cache->index, MExxBSIZE,
- MERAM_MExxBSIZE_VAL(0x0, line_cnt - 1, xpitch - 1));
- meram_write_icb(priv->base, plane->marker->index, MExxBSIZE,
- MERAM_MExxBSIZE_VAL(0xf, line_cnt - 1, xpitch - 1));
-
- meram_write_icb(priv->base, plane->cache->index, MExxMNCF, bnm);
- meram_write_icb(priv->base, plane->marker->index, MExxMNCF, bnm);
-
- meram_write_icb(priv->base, plane->cache->index, MExxSBSIZE, xpitch);
- meram_write_icb(priv->base, plane->marker->index, MExxSBSIZE, xpitch);
-
- /* save a cache unit size */
- plane->cache->cache_unit = xres * save_lines;
- plane->marker->cache_unit = xres * save_lines;
-
- /*
- * Set MERAM for framebuffer
- *
- * 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, plane->cache->index, MExxCTL,
- MERAM_MExxCTL_VAL(plane->marker->index, marker->offset)
- | MExxCTL_WD1 | MExxCTL_WD0 | MExxCTL_WS | MExxCTL_CM |
- MExxCTL_MD_FB);
- meram_write_icb(priv->base, plane->marker->index, MExxCTL,
- MERAM_MExxCTL_VAL(plane->cache->index, marker->offset +
- plane->marker->size / 2) |
- MExxCTL_WD1 | MExxCTL_WD0 | MExxCTL_WS | MExxCTL_CM |
- MExxCTL_MD_FB);
-
- return 0;
-}
-
-static void meram_plane_cleanup(struct sh_mobile_meram_priv *priv,
- struct sh_mobile_meram_fb_plane *plane)
-{
- /* disable ICB */
- meram_write_icb(priv->base, plane->cache->index, MExxCTL,
- MExxCTL_WBF | MExxCTL_WF | MExxCTL_RF);
- meram_write_icb(priv->base, plane->marker->index, MExxCTL,
- MExxCTL_WBF | MExxCTL_WF | MExxCTL_RF);
-
- plane->cache->cache_unit = 0;
- plane->marker->cache_unit = 0;
-}
-
-/* -----------------------------------------------------------------------------
- * MERAM operations
- */
-
-unsigned long sh_mobile_meram_alloc(struct sh_mobile_meram_info *pdata,
- size_t size)
-{
- struct sh_mobile_meram_priv *priv = pdata->priv;
-
- return meram_alloc(priv, size);
-}
-EXPORT_SYMBOL_GPL(sh_mobile_meram_alloc);
-
-void sh_mobile_meram_free(struct sh_mobile_meram_info *pdata, unsigned long mem,
- size_t size)
-{
- struct sh_mobile_meram_priv *priv = pdata->priv;
-
- meram_free(priv, mem, size);
-}
-EXPORT_SYMBOL_GPL(sh_mobile_meram_free);
-
-/* Allocate memory for the ICBs and mark them as used. */
-static struct sh_mobile_meram_fb_cache *
-meram_cache_alloc(struct sh_mobile_meram_priv *priv,
- const struct sh_mobile_meram_cfg *cfg,
- int pixelformat)
-{
- unsigned int nplanes = is_nvcolor(pixelformat) ? 2 : 1;
- struct sh_mobile_meram_fb_cache *cache;
- int ret;
-
- cache = kzalloc(sizeof(*cache), GFP_KERNEL);
- if (cache == NULL)
- return ERR_PTR(-ENOMEM);
-
- cache->nplanes = nplanes;
-
- ret = meram_plane_alloc(priv, &cache->planes[0],
- cfg->icb[0].meram_size);
- if (ret < 0)
- goto error;
-
- cache->planes[0].marker->current_reg = 1;
- cache->planes[0].marker->pixelformat = pixelformat;
-
- if (cache->nplanes == 1)
- return cache;
-
- ret = meram_plane_alloc(priv, &cache->planes[1],
- cfg->icb[1].meram_size);
- if (ret < 0) {
- meram_plane_free(priv, &cache->planes[0]);
- goto error;
- }
-
- return cache;
-
-error:
- kfree(cache);
- return ERR_PTR(-ENOMEM);
-}
-
-void *sh_mobile_meram_cache_alloc(struct sh_mobile_meram_info *pdata,
- const struct sh_mobile_meram_cfg *cfg,
- unsigned int xres, unsigned int yres,
- unsigned int pixelformat, unsigned int *pitch)
-{
- struct sh_mobile_meram_fb_cache *cache;
- struct sh_mobile_meram_priv *priv = pdata->priv;
- struct platform_device *pdev = pdata->pdev;
- unsigned int nplanes = is_nvcolor(pixelformat) ? 2 : 1;
- unsigned int out_pitch;
-
- if (priv == NULL)
- return ERR_PTR(-ENODEV);
-
- if (pixelformat != SH_MOBILE_MERAM_PF_NV &&
- pixelformat != SH_MOBILE_MERAM_PF_NV24 &&
- pixelformat != SH_MOBILE_MERAM_PF_RGB)
- return ERR_PTR(-EINVAL);
-
- dev_dbg(&pdev->dev, "registering %dx%d (%s)", xres, yres,
- !pixelformat ? "yuv" : "rgb");
-
- /* we can't handle wider than 8192px */
- if (xres > 8192) {
- dev_err(&pdev->dev, "width exceeding the limit (> 8192).");
- return ERR_PTR(-EINVAL);
- }
-
- if (cfg->icb[0].meram_size == 0)
- return ERR_PTR(-EINVAL);
-
- if (nplanes == 2 && cfg->icb[1].meram_size == 0)
- return ERR_PTR(-EINVAL);
-
- mutex_lock(&priv->lock);
-
- /* We now register the ICBs and allocate the MERAM regions. */
- cache = meram_cache_alloc(priv, cfg, pixelformat);
- if (IS_ERR(cache)) {
- dev_err(&pdev->dev, "MERAM allocation failed (%ld).",
- PTR_ERR(cache));
- goto err;
- }
-
- /* initialize MERAM */
- meram_plane_init(priv, &cache->planes[0], xres, yres, &out_pitch);
- *pitch = out_pitch;
- if (pixelformat == SH_MOBILE_MERAM_PF_NV)
- meram_plane_init(priv, &cache->planes[1],
- xres, (yres + 1) / 2, &out_pitch);
- else if (pixelformat == SH_MOBILE_MERAM_PF_NV24)
- meram_plane_init(priv, &cache->planes[1],
- 2 * xres, (yres + 1) / 2, &out_pitch);
-
-err:
- mutex_unlock(&priv->lock);
- return cache;
-}
-EXPORT_SYMBOL_GPL(sh_mobile_meram_cache_alloc);
-
-void
-sh_mobile_meram_cache_free(struct sh_mobile_meram_info *pdata, void *data)
-{
- struct sh_mobile_meram_fb_cache *cache = data;
- struct sh_mobile_meram_priv *priv = pdata->priv;
-
- mutex_lock(&priv->lock);
-
- /* Cleanup and free. */
- meram_plane_cleanup(priv, &cache->planes[0]);
- meram_plane_free(priv, &cache->planes[0]);
-
- if (cache->nplanes == 2) {
- meram_plane_cleanup(priv, &cache->planes[1]);
- meram_plane_free(priv, &cache->planes[1]);
- }
-
- kfree(cache);
-
- mutex_unlock(&priv->lock);
-}
-EXPORT_SYMBOL_GPL(sh_mobile_meram_cache_free);
-
-void
-sh_mobile_meram_cache_update(struct sh_mobile_meram_info *pdata, void *data,
- unsigned long base_addr_y,
- unsigned long base_addr_c,
- unsigned long *icb_addr_y,
- unsigned long *icb_addr_c)
-{
- struct sh_mobile_meram_fb_cache *cache = data;
- struct sh_mobile_meram_priv *priv = pdata->priv;
-
- mutex_lock(&priv->lock);
-
- meram_set_next_addr(priv, cache, base_addr_y, base_addr_c);
- meram_get_next_icb_addr(pdata, cache, icb_addr_y, icb_addr_c);
-
- mutex_unlock(&priv->lock);
-}
-EXPORT_SYMBOL_GPL(sh_mobile_meram_cache_update);
-
-/* -----------------------------------------------------------------------------
- * Power management
- */
-
-#ifdef CONFIG_PM
-static int sh_mobile_meram_suspend(struct device *dev)
-{
- struct sh_mobile_meram_priv *priv = dev_get_drvdata(dev);
- unsigned int i, j;
-
- for (i = 0; i < MERAM_REGS_SIZE; i++)
- priv->regs[i] = meram_read_reg(priv->base, common_regs[i]);
-
- for (i = 0; i < 32; i++) {
- if (!test_bit(i, &priv->used_icb))
- continue;
- for (j = 0; j < ICB_REGS_SIZE; j++) {
- priv->icbs[i].regs[j] =
- meram_read_icb(priv->base, i, icb_regs[j]);
- /* Reset ICB on resume */
- if (icb_regs[j] == MExxCTL)
- priv->icbs[i].regs[j] |=
- MExxCTL_WBF | MExxCTL_WF | MExxCTL_RF;
- }
- }
- return 0;
-}
-
-static int sh_mobile_meram_resume(struct device *dev)
-{
- struct sh_mobile_meram_priv *priv = dev_get_drvdata(dev);
- unsigned int i, j;
-
- for (i = 0; i < 32; i++) {
- if (!test_bit(i, &priv->used_icb))
- continue;
- for (j = 0; j < ICB_REGS_SIZE; j++)
- meram_write_icb(priv->base, i, icb_regs[j],
- priv->icbs[i].regs[j]);
- }
-
- for (i = 0; i < MERAM_REGS_SIZE; i++)
- meram_write_reg(priv->base, common_regs[i], priv->regs[i]);
- return 0;
-}
-#endif /* CONFIG_PM */
-
-static UNIVERSAL_DEV_PM_OPS(sh_mobile_meram_dev_pm_ops,
- sh_mobile_meram_suspend,
- sh_mobile_meram_resume, NULL);
-
-/* -----------------------------------------------------------------------------
- * Probe/remove and driver init/exit
- */
-
-static int 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 *regs;
- struct resource *meram;
- unsigned int i;
- int error;
-
- if (!pdata) {
- dev_err(&pdev->dev, "no platform data defined\n");
- return -EINVAL;
- }
-
- regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- meram = platform_get_resource(pdev, IORESOURCE_MEM, 1);
- if (regs == NULL || meram == NULL) {
- dev_err(&pdev->dev, "cannot get platform resources\n");
- return -ENOENT;
- }
-
- priv = kzalloc(sizeof(*priv), GFP_KERNEL);
- if (!priv)
- return -ENOMEM;
-
- /* Initialize private data. */
- mutex_init(&priv->lock);
- priv->used_icb = pdata->reserved_icbs;
-
- for (i = 0; i < MERAM_ICB_NUM; ++i)
- priv->icbs[i].index = i;
-
- pdata->priv = priv;
- pdata->pdev = pdev;
-
- /* Request memory regions and remap the registers. */
- if (!request_mem_region(regs->start, resource_size(regs), pdev->name)) {
- dev_err(&pdev->dev, "MERAM registers region already claimed\n");
- error = -EBUSY;
- goto err_req_regs;
- }
-
- if (!request_mem_region(meram->start, resource_size(meram),
- pdev->name)) {
- dev_err(&pdev->dev, "MERAM memory region already claimed\n");
- error = -EBUSY;
- goto err_req_meram;
- }
-
- priv->base = ioremap_nocache(regs->start, resource_size(regs));
- if (!priv->base) {
- dev_err(&pdev->dev, "ioremap failed\n");
- error = -EFAULT;
- goto err_ioremap;
- }
-
- priv->meram = meram->start;
-
- /* Create and initialize the MERAM memory pool. */
- priv->pool = gen_pool_create(ilog2(MERAM_GRANULARITY), -1);
- if (priv->pool == NULL) {
- error = -ENOMEM;
- goto err_genpool;
- }
-
- error = gen_pool_add(priv->pool, meram->start, resource_size(meram),
- -1);
- if (error < 0)
- goto err_genpool;
-
- /* initialize ICB addressing mode */
- if (pdata->addr_mode == SH_MOBILE_MERAM_MODE1)
- meram_write_reg(priv->base, MEVCR1, MEVCR1_AMD1);
-
- platform_set_drvdata(pdev, priv);
- pm_runtime_enable(&pdev->dev);
-
- dev_info(&pdev->dev, "sh_mobile_meram initialized.");
-
- return 0;
-
-err_genpool:
- if (priv->pool)
- gen_pool_destroy(priv->pool);
- iounmap(priv->base);
-err_ioremap:
- release_mem_region(meram->start, resource_size(meram));
-err_req_meram:
- release_mem_region(regs->start, resource_size(regs));
-err_req_regs:
- mutex_destroy(&priv->lock);
- kfree(priv);
-
- return error;
-}
-
-
-static int sh_mobile_meram_remove(struct platform_device *pdev)
-{
- struct sh_mobile_meram_priv *priv = platform_get_drvdata(pdev);
- struct resource *regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- struct resource *meram = platform_get_resource(pdev, IORESOURCE_MEM, 1);
-
- pm_runtime_disable(&pdev->dev);
-
- gen_pool_destroy(priv->pool);
-
- iounmap(priv->base);
- release_mem_region(meram->start, resource_size(meram));
- release_mem_region(regs->start, resource_size(regs));
-
- mutex_destroy(&priv->lock);
-
- kfree(priv);
-
- return 0;
-}
-
-static struct platform_driver sh_mobile_meram_driver = {
- .driver = {
- .name = "sh_mobile_meram",
- .pm = &sh_mobile_meram_dev_pm_ops,
- },
- .probe = sh_mobile_meram_probe,
- .remove = sh_mobile_meram_remove,
-};
-
-module_platform_driver(sh_mobile_meram_driver);
-
-MODULE_DESCRIPTION("SuperH Mobile MERAM driver");
-MODULE_AUTHOR("Damian Hobson-Garcia / Takanari Hayama");
-MODULE_LICENSE("GPL v2");
projects / linux-2.6-microblaze.git / commitdiff