- 根目录:
- drivers
- video
- fbdev
- sh_mobile_meram.c
/*
* 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 platform_device *pdev = to_platform_device(dev);
struct sh_mobile_meram_priv *priv = platform_get_drvdata(pdev);
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 platform_device *pdev = to_platform_device(dev);
struct sh_mobile_meram_priv *priv = platform_get_drvdata(pdev);
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) {
dev_err(&pdev->dev, "cannot allocate device data\n");
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");