*/
#include <linux/device.h>
+#include <linux/err.h>
#include <linux/genalloc.h>
#include <linux/io.h>
#include <linux/kernel.h>
/*
* sh_mobile_meram_icb - MERAM ICB information
* @regs: Registers cache
+ * @index: ICB index
* @offset: MERAM block offset
- * @size: MERAM block size in bytes
+ * @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;
#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
* Allocation
*/
-/* Check if there's no overlaps in MERAM allocation. */
-static int meram_check_overlap(struct sh_mobile_meram_priv *priv,
- const struct sh_mobile_meram_icb_cfg *new)
+/* Allocate ICBs and MERAM for a plane. */
+static int __meram_alloc(struct sh_mobile_meram_priv *priv,
+ struct sh_mobile_meram_fb_plane *plane,
+ size_t size)
{
- /* 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;
+ unsigned long mem;
+ unsigned long idx;
- return 0;
-}
+ idx = find_first_zero_bit(&priv->used_icb, 28);
+ if (idx == 28)
+ return -ENOMEM;
+ plane->cache = &priv->icbs[idx];
-/* Allocate memory for the ICBs and mark them as used. */
-static int meram_alloc(struct sh_mobile_meram_priv *priv,
- const struct sh_mobile_meram_icb_cfg *new,
- int pixelformat)
-{
- struct sh_mobile_meram_icb *marker = &priv->icbs[new->marker_icb];
- unsigned long mem;
+ idx = find_next_zero_bit(&priv->used_icb, 32, 28);
+ if (idx == 32)
+ return -ENOMEM;
+ plane->marker = &priv->icbs[idx];
- mem = gen_pool_alloc(priv->pool, new->meram_size * 1024);
+ mem = gen_pool_alloc(priv->pool, size * 1024);
if (mem == 0)
return -ENOMEM;
- __set_bit(new->marker_icb, &priv->used_icb);
- __set_bit(new->cache_icb, &priv->used_icb);
+ __set_bit(plane->marker->index, &priv->used_icb);
+ __set_bit(plane->cache->index, &priv->used_icb);
- marker->offset = mem - priv->meram;
- marker->size = new->meram_size * 1024;
- marker->current_reg = 1;
- marker->pixelformat = pixelformat;
+ plane->marker->offset = mem - priv->meram;
+ plane->marker->size = size;
return 0;
}
-/* Unmark the specified ICB as used. */
-static void meram_free(struct sh_mobile_meram_priv *priv,
- const struct sh_mobile_meram_icb_cfg *icb)
+/* Free ICBs and MERAM for a plane. */
+static void __meram_free(struct sh_mobile_meram_priv *priv,
+ struct sh_mobile_meram_fb_plane *plane)
{
- struct sh_mobile_meram_icb *marker = &priv->icbs[icb->marker_icb];
+ gen_pool_free(priv->pool, priv->meram + plane->marker->offset,
+ plane->marker->size * 1024);
- gen_pool_free(priv->pool, priv->meram + marker->offset, marker->size);
-
- __clear_bit(icb->marker_icb, &priv->used_icb);
- __clear_bit(icb->cache_icb, &priv->used_icb);
+ __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? */
return 0;
}
+/* Allocate memory for the ICBs and mark them as used. */
+static struct sh_mobile_meram_fb_cache *
+meram_alloc(struct sh_mobile_meram_priv *priv,
+ const struct sh_mobile_meram_cfg *cfg,
+ int pixelformat)
+{
+ struct sh_mobile_meram_fb_cache *cache;
+ unsigned int nplanes = is_nvcolor(pixelformat) ? 2 : 1;
+ int ret;
+
+ if (cfg->icb[0].meram_size == 0)
+ return ERR_PTR(-EINVAL);
+
+ if (nplanes == 2 && cfg->icb[1].meram_size == 0)
+ return ERR_PTR(-EINVAL);
+
+ cache = kzalloc(sizeof(*cache), GFP_KERNEL);
+ if (cache == NULL)
+ return ERR_PTR(-ENOMEM);
+
+ cache->nplanes = nplanes;
+
+ ret = __meram_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_alloc(priv, &cache->planes[1], cfg->icb[1].meram_size);
+ if (ret < 0) {
+ __meram_free(priv, &cache->planes[0]);
+ goto error;
+ }
+
+ return cache;
+
+error:
+ kfree(cache);
+ return ERR_PTR(-ENOMEM);
+}
+
+/* Unmark the specified ICB as used. */
+static void meram_free(struct sh_mobile_meram_priv *priv,
+ struct sh_mobile_meram_fb_cache *cache)
+{
+ __meram_free(priv, &cache->planes[0]);
+ if (cache->nplanes == 2)
+ __meram_free(priv, &cache->planes[1]);
+
+ kfree(cache);
+}
+
/* Set the next address to fetch. */
static void meram_set_next_addr(struct sh_mobile_meram_priv *priv,
- const struct sh_mobile_meram_cfg *cfg,
+ struct sh_mobile_meram_fb_cache *cache,
unsigned long base_addr_y,
unsigned long base_addr_c)
{
- struct sh_mobile_meram_icb *icb = &priv->icbs[cfg->icb[0].marker_icb];
+ 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, cfg->icb[0].cache_icb, target,
+ meram_write_icb(priv->base, cache->planes[0].cache->index, target,
base_addr_y);
- meram_write_icb(priv->base, cfg->icb[0].marker_icb, target,
- base_addr_y +
- priv->icbs[cfg->icb[0].marker_icb].cache_unit);
-
- if (is_nvcolor(icb->pixelformat)) {
- 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 +
- priv->icbs[cfg->icb[1].marker_icb].cache_unit);
+ 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,
- const struct sh_mobile_meram_cfg *cfg,
+ struct sh_mobile_meram_fb_cache *cache,
unsigned long *icb_addr_y, unsigned long *icb_addr_c)
{
- struct sh_mobile_meram_priv *priv = pdata->priv;
- struct sh_mobile_meram_icb *icb = &priv->icbs[cfg->icb[0].marker_icb];
+ struct sh_mobile_meram_icb *icb = cache->planes[0].marker;
unsigned long icb_offset;
if (pdata->addr_mode == SH_MOBILE_MERAM_MODE0)
else
icb_offset = 0xc0000000 | (icb->current_reg << 23);
- *icb_addr_y = icb_offset | (cfg->icb[0].marker_icb << 24);
- if (is_nvcolor(icb->pixelformat))
- *icb_addr_c = icb_offset | (cfg->icb[1].marker_icb << 24);
+ *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) \
/* Initialize MERAM. */
static int meram_init(struct sh_mobile_meram_priv *priv,
- const struct sh_mobile_meram_icb_cfg *icb,
+ struct sh_mobile_meram_fb_plane *plane,
unsigned int xres, unsigned int yres,
unsigned int *out_pitch)
{
- struct sh_mobile_meram_icb *marker = &priv->icbs[icb->marker_icb];
+ 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;
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 = plane->marker->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 = 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, icb->cache_icb, MExxBSIZE,
+ meram_write_icb(priv->base, plane->cache->index, MExxBSIZE,
MERAM_MExxBSIZE_VAL(0x0, line_cnt - 1, xpitch - 1));
- meram_write_icb(priv->base, icb->marker_icb, MExxBSIZE,
+ meram_write_icb(priv->base, plane->marker->index, 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, plane->cache->index, MExxMNCF, bnm);
+ meram_write_icb(priv->base, plane->marker->index, MExxMNCF, bnm);
- meram_write_icb(priv->base, icb->cache_icb, MExxSBSIZE, xpitch);
- meram_write_icb(priv->base, icb->marker_icb, MExxSBSIZE, xpitch);
+ 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 */
- priv->icbs[icb->cache_icb].cache_unit = xres * save_lines;
- priv->icbs[icb->marker_icb].cache_unit = xres * save_lines;
+ 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, icb->cache_icb, MExxCTL,
- MERAM_MExxCTL_VAL(icb->marker_icb, marker->offset) |
- MExxCTL_WD1 | MExxCTL_WD0 | MExxCTL_WS | MExxCTL_CM |
+ 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, icb->marker_icb, MExxCTL,
- MERAM_MExxCTL_VAL(icb->cache_icb, marker->offset +
- icb->meram_size / 2) |
+ 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);
}
static void meram_deinit(struct sh_mobile_meram_priv *priv,
- const struct sh_mobile_meram_icb_cfg *icb)
+ struct sh_mobile_meram_fb_plane *plane)
{
/* disable ICB */
- meram_write_icb(priv->base, icb->cache_icb, MExxCTL,
+ meram_write_icb(priv->base, plane->cache->index, MExxCTL,
MExxCTL_WBF | MExxCTL_WF | MExxCTL_RF);
- meram_write_icb(priv->base, icb->marker_icb, MExxCTL,
+ meram_write_icb(priv->base, plane->marker->index, MExxCTL,
MExxCTL_WBF | MExxCTL_WF | MExxCTL_RF);
- priv->icbs[icb->cache_icb].cache_unit = 0;
- priv->icbs[icb->marker_icb].cache_unit = 0;
+ plane->cache->cache_unit = 0;
+ plane->marker->cache_unit = 0;
}
/* -----------------------------------------------------------------------------
* Registration/unregistration
*/
-static int sh_mobile_meram_register(struct sh_mobile_meram_info *pdata,
- const struct sh_mobile_meram_cfg *cfg,
- unsigned int xres, unsigned int yres,
- unsigned int pixelformat,
- unsigned long base_addr_y,
- unsigned long base_addr_c,
- unsigned long *icb_addr_y,
- unsigned long *icb_addr_c,
- unsigned int *pitch)
+static void *sh_mobile_meram_register(struct sh_mobile_meram_info *pdata,
+ const struct sh_mobile_meram_cfg *cfg,
+ unsigned int xres, unsigned int yres,
+ unsigned int pixelformat,
+ unsigned long base_addr_y,
+ unsigned long base_addr_c,
+ unsigned long *icb_addr_y,
+ unsigned long *icb_addr_c,
+ unsigned int *pitch)
{
- struct platform_device *pdev;
+ struct sh_mobile_meram_fb_cache *cache;
struct sh_mobile_meram_priv *priv;
+ struct platform_device *pdev;
unsigned int out_pitch;
- unsigned int n;
- int error = 0;
if (!pdata || !pdata->priv || !pdata->pdev || !cfg)
- return -EINVAL;
+ return ERR_PTR(-EINVAL);
if (pixelformat != SH_MOBILE_MERAM_PF_NV &&
pixelformat != SH_MOBILE_MERAM_PF_NV24 &&
pixelformat != SH_MOBILE_MERAM_PF_RGB)
- return -EINVAL;
+ return ERR_PTR(-EINVAL);
priv = pdata->priv;
pdev = pdata->pdev;
/* we can't handle wider than 8192px */
if (xres > 8192) {
dev_err(&pdev->dev, "width exceeding the limit (> 8192).");
- return -EINVAL;
- }
-
- /* 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.");
- return -EINVAL;
+ return ERR_PTR(-EINVAL);
}
mutex_lock(&priv->lock);
- /* 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 (is_nvcolor(pixelformat) && n != 2) {
- dev_err(&pdev->dev, "requires two ICB sets for planar Y/C.");
- error = -EINVAL;
- goto err;
- }
-
/* We now register the ICBs and allocate the MERAM regions. */
- error = meram_alloc(priv, &cfg->icb[0], pixelformat);
- if (error < 0)
+ cache = meram_alloc(priv, cfg, pixelformat);
+ if (IS_ERR(cache)) {
+ dev_err(&pdev->dev, "MERAM allocation failed (%ld).",
+ PTR_ERR(cache));
goto err;
-
- if (is_nvcolor(pixelformat)) {
- error = meram_alloc(priv, &cfg->icb[1], pixelformat);
- if (error < 0) {
- meram_free(priv, &cfg->icb[0]);
- goto err;
- }
}
/* initialize MERAM */
- meram_init(priv, &cfg->icb[0], xres, yres, &out_pitch);
+ meram_init(priv, &cache->planes[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,
+ meram_init(priv, &cache->planes[1], xres, (yres + 1) / 2,
&out_pitch);
else if (pixelformat == SH_MOBILE_MERAM_PF_NV24)
- meram_init(priv, &cfg->icb[1], 2 * xres, (yres + 1) / 2,
+ meram_init(priv, &cache->planes[1], 2 * xres, (yres + 1) / 2,
&out_pitch);
- 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);
+ 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);
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;
+ return cache;
}
-static int sh_mobile_meram_unregister(struct sh_mobile_meram_info *pdata,
- const struct sh_mobile_meram_cfg *cfg)
+static int
+sh_mobile_meram_unregister(struct sh_mobile_meram_info *pdata, void *data)
{
+ struct sh_mobile_meram_fb_cache *cache = data;
struct sh_mobile_meram_priv *priv;
- struct sh_mobile_meram_icb *icb;
- if (!pdata || !pdata->priv || !cfg)
+ if (!pdata || !pdata->priv || !data)
return -EINVAL;
priv = pdata->priv;
- icb = &priv->icbs[cfg->icb[0].marker_icb];
mutex_lock(&priv->lock);
- /* deinit & unmark */
- if (is_nvcolor(icb->pixelformat)) {
- meram_deinit(priv, &cfg->icb[1]);
- meram_free(priv, &cfg->icb[1]);
- }
- meram_deinit(priv, &cfg->icb[0]);
- meram_free(priv, &cfg->icb[0]);
+ /* deinit & free */
+ meram_deinit(priv, &cache->planes[0]);
+ if (cache->nplanes == 2)
+ meram_deinit(priv, &cache->planes[1]);
+
+ meram_free(priv, cache);
mutex_unlock(&priv->lock);
return 0;
}
-static int sh_mobile_meram_update(struct sh_mobile_meram_info *pdata,
- const 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)
+static int
+sh_mobile_meram_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;
- if (!pdata || !pdata->priv || !cfg)
+ if (!pdata || !pdata->priv || !data)
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);
+ 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);
struct sh_mobile_meram_info *pdata = pdev->dev.platform_data;
struct resource *regs;
struct resource *meram;
+ unsigned int i;
int error;
if (!pdata) {
return -ENOMEM;
}
- /* initialize private data */
+ /* 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->ops = &sh_mobile_meram_ops;
pdata->priv = priv;
pdata->pdev = pdev;
git.samba.org / sfrench / cifs-2.6.git / commitdiff