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Commit 7554340c authored by Laurent Pinchart's avatar Laurent Pinchart
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fbdev: sh_mobile_meram: Divide the code into sections 

And rename a couple of constants to make prefixes more uniform.
Signed-off-by: default avatarLaurent Pinchart <laurent.pinchart@ideasonboard.com>
parent 762f7cc9
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Showing with 44 additions and 54 deletions
drivers/video/sh_mobile_meram.c
View file @ 7554340c
...@@ -9,16 +9,20 @@ ...@@ -9,16 +9,20 @@
* for more details. * for more details.
*/ */
#include <linux/device.h>
#include <linux/io.h>
#include <linux/kernel.h> #include <linux/kernel.h>
#include <linux/module.h> #include <linux/module.h>
#include <linux/device.h> #include <linux/platform_device.h>
#include <linux/pm_runtime.h> #include <linux/pm_runtime.h>
#include <linux/io.h>
#include <linux/slab.h> #include <linux/slab.h>
#include <linux/platform_device.h>
#include <video/sh_mobile_meram.h> #include <video/sh_mobile_meram.h>
/* meram registers */ /* -----------------------------------------------------------------------------
* MERAM registers
*/
#define MEVCR1 0x4 #define MEVCR1 0x4
#define MEVCR1_RST (1 << 31) #define MEVCR1_RST (1 << 31)
#define MEVCR1_WD (1 << 30) #define MEVCR1_WD (1 << 30)
...@@ -81,14 +85,12 @@ ...@@ -81,14 +85,12 @@
((yszm1) << MExxBSIZE_YSZM1_SHIFT) | \ ((yszm1) << MExxBSIZE_YSZM1_SHIFT) | \
((xszm1) << MExxBSIZE_XSZM1_SHIFT)) ((xszm1) << MExxBSIZE_XSZM1_SHIFT))
#define SH_MOBILE_MERAM_ICB_NUM 32
static const unsigned long common_regs[] = { static const unsigned long common_regs[] = {
MEVCR1, MEVCR1,
MEQSEL1, MEQSEL1,
MEQSEL2, MEQSEL2,
}; };
#define CMN_REGS_SIZE ARRAY_SIZE(common_regs) #define MERAM_REGS_SIZE ARRAY_SIZE(common_regs)
static const unsigned long icb_regs[] = { static const unsigned long icb_regs[] = {
MExxCTL, MExxCTL,
...@@ -117,6 +119,8 @@ struct sh_mobile_meram_icb { ...@@ -117,6 +119,8 @@ struct sh_mobile_meram_icb {
unsigned int current_reg; unsigned int current_reg;
}; };
#define MERAM_ICB_NUM 32
/* /*
* sh_mobile_meram_priv - MERAM device * sh_mobile_meram_priv - MERAM device
* @base: Registers base address * @base: Registers base address
...@@ -127,19 +131,19 @@ struct sh_mobile_meram_icb { ...@@ -127,19 +131,19 @@ struct sh_mobile_meram_icb {
*/ */
struct sh_mobile_meram_priv { struct sh_mobile_meram_priv {
void __iomem *base; void __iomem *base;
unsigned long regs[CMN_REGS_SIZE]; unsigned long regs[MERAM_REGS_SIZE];
struct mutex lock; struct mutex lock;
unsigned long used_icb; unsigned long used_icb;
struct sh_mobile_meram_icb icbs[SH_MOBILE_MERAM_ICB_NUM]; struct sh_mobile_meram_icb icbs[MERAM_ICB_NUM];
}; };
/* settings */ /* settings */
#define MERAM_SEC_LINE 15 #define MERAM_SEC_LINE 15
#define MERAM_LINE_WIDTH 2048 #define MERAM_LINE_WIDTH 2048
/* /* -----------------------------------------------------------------------------
* MERAM/ICB access functions * Registers access
*/ */
#define MERAM_ICB_OFFSET(base, idx, off) ((base) + (off) + (idx) * 0x20) #define MERAM_ICB_OFFSET(base, idx, off) ((base) + (off) + (idx) * 0x20)
...@@ -167,8 +171,8 @@ static inline unsigned long meram_read_reg(void __iomem *base, unsigned int off) ...@@ -167,8 +171,8 @@ static inline unsigned long meram_read_reg(void __iomem *base, unsigned int off)
return ioread32(base + off); return ioread32(base + off);
} }
/* /* -----------------------------------------------------------------------------
* register ICB * Allocation
*/ */
#define MERAM_CACHE_START(p) ((p) >> 16) #define MERAM_CACHE_START(p) ((p) >> 16)
...@@ -176,10 +180,7 @@ static inline unsigned long meram_read_reg(void __iomem *base, unsigned int off) ...@@ -176,10 +180,7 @@ static inline unsigned long meram_read_reg(void __iomem *base, unsigned int off)
#define MERAM_CACHE_SET(o, s) ((((o) & 0xffff) << 16) | \ #define MERAM_CACHE_SET(o, s) ((((o) & 0xffff) << 16) | \
(((o) + (s) - 1) & 0xffff)) (((o) + (s) - 1) & 0xffff))
/* /* Check if there's no overlaps in MERAM allocation. */
* check if there's no overlaps in MERAM allocation.
*/
static int meram_check_overlap(struct sh_mobile_meram_priv *priv, static int meram_check_overlap(struct sh_mobile_meram_priv *priv,
const struct sh_mobile_meram_icb_cfg *new) const struct sh_mobile_meram_icb_cfg *new)
{ {
...@@ -194,7 +195,7 @@ static int meram_check_overlap(struct sh_mobile_meram_priv *priv, ...@@ -194,7 +195,7 @@ static int meram_check_overlap(struct sh_mobile_meram_priv *priv,
test_bit(new->cache_icb, &priv->used_icb)) test_bit(new->cache_icb, &priv->used_icb))
return 1; return 1;
for (i = 0; i < SH_MOBILE_MERAM_ICB_NUM; i++) { for (i = 0; i < MERAM_ICB_NUM; i++) {
if (!test_bit(i, &priv->used_icb)) if (!test_bit(i, &priv->used_icb))
continue; continue;
...@@ -211,10 +212,7 @@ static int meram_check_overlap(struct sh_mobile_meram_priv *priv, ...@@ -211,10 +212,7 @@ static int meram_check_overlap(struct sh_mobile_meram_priv *priv,
return 0; return 0;
} }
/* /* Mark the specified ICB as used. */
* mark the specified ICB as used
*/
static void meram_mark(struct sh_mobile_meram_priv *priv, static void meram_mark(struct sh_mobile_meram_priv *priv,
const struct sh_mobile_meram_icb_cfg *new, const struct sh_mobile_meram_icb_cfg *new,
int pixelformat) int pixelformat)
...@@ -230,10 +228,7 @@ static void meram_mark(struct sh_mobile_meram_priv *priv, ...@@ -230,10 +228,7 @@ static void meram_mark(struct sh_mobile_meram_priv *priv,
priv->icbs[new->marker_icb].pixelformat = pixelformat; priv->icbs[new->marker_icb].pixelformat = pixelformat;
} }
/* /* Unmark the specified ICB as used. */
* unmark the specified ICB as used
*/
static void meram_unmark(struct sh_mobile_meram_priv *priv, static void meram_unmark(struct sh_mobile_meram_priv *priv,
const struct sh_mobile_meram_icb_cfg *icb) const struct sh_mobile_meram_icb_cfg *icb)
{ {
...@@ -241,9 +236,7 @@ static void meram_unmark(struct sh_mobile_meram_priv *priv, ...@@ -241,9 +236,7 @@ static void meram_unmark(struct sh_mobile_meram_priv *priv,
__clear_bit(icb->cache_icb, &priv->used_icb); __clear_bit(icb->cache_icb, &priv->used_icb);
} }
/* /* Is this a YCbCr(NV12, NV16 or NV24) colorspace? */
* is this a YCbCr(NV12, NV16 or NV24) colorspace
*/
static int is_nvcolor(int cspace) static int is_nvcolor(int cspace)
{ {
if (cspace == SH_MOBILE_MERAM_PF_NV || if (cspace == SH_MOBILE_MERAM_PF_NV ||
...@@ -252,9 +245,7 @@ static int is_nvcolor(int cspace) ...@@ -252,9 +245,7 @@ static int is_nvcolor(int cspace)
return 0; return 0;
} }
/* /* Set the next address to fetch. */
* set the next address to fetch
*/
static void meram_set_next_addr(struct sh_mobile_meram_priv *priv, static void meram_set_next_addr(struct sh_mobile_meram_priv *priv,
const struct sh_mobile_meram_cfg *cfg, const struct sh_mobile_meram_cfg *cfg,
unsigned long base_addr_y, unsigned long base_addr_y,
...@@ -282,9 +273,7 @@ static void meram_set_next_addr(struct sh_mobile_meram_priv *priv, ...@@ -282,9 +273,7 @@ static void meram_set_next_addr(struct sh_mobile_meram_priv *priv,
} }
} }
/* /* Get the next ICB address. */
* get the next ICB address
*/
static void static void
meram_get_next_icb_addr(struct sh_mobile_meram_info *pdata, meram_get_next_icb_addr(struct sh_mobile_meram_info *pdata,
const struct sh_mobile_meram_cfg *cfg, const struct sh_mobile_meram_cfg *cfg,
...@@ -307,10 +296,7 @@ meram_get_next_icb_addr(struct sh_mobile_meram_info *pdata, ...@@ -307,10 +296,7 @@ meram_get_next_icb_addr(struct sh_mobile_meram_info *pdata,
#define MERAM_CALC_BYTECOUNT(x, y) \ #define MERAM_CALC_BYTECOUNT(x, y) \
(((x) * (y) + (MERAM_LINE_WIDTH - 1)) & ~(MERAM_LINE_WIDTH - 1)) (((x) * (y) + (MERAM_LINE_WIDTH - 1)) & ~(MERAM_LINE_WIDTH - 1))
/* /* Initialize MERAM. */
* initialize MERAM
*/
static int meram_init(struct sh_mobile_meram_priv *priv, static int meram_init(struct sh_mobile_meram_priv *priv,
const struct sh_mobile_meram_icb_cfg *icb, const struct sh_mobile_meram_icb_cfg *icb,
unsigned int xres, unsigned int yres, unsigned int xres, unsigned int yres,
...@@ -395,8 +381,8 @@ static void meram_deinit(struct sh_mobile_meram_priv *priv, ...@@ -395,8 +381,8 @@ static void meram_deinit(struct sh_mobile_meram_priv *priv,
priv->icbs[icb->marker_icb].cache_unit = 0; priv->icbs[icb->marker_icb].cache_unit = 0;
} }
/* /* -----------------------------------------------------------------------------
* register the ICB * Registration/unregistration
*/ */
static int sh_mobile_meram_register(struct sh_mobile_meram_info *pdata, static int sh_mobile_meram_register(struct sh_mobile_meram_info *pdata,
...@@ -545,13 +531,24 @@ static int sh_mobile_meram_update(struct sh_mobile_meram_info *pdata, ...@@ -545,13 +531,24 @@ static int sh_mobile_meram_update(struct sh_mobile_meram_info *pdata,
return 0; 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,
};
/* -----------------------------------------------------------------------------
* Power management
*/
static int sh_mobile_meram_runtime_suspend(struct device *dev) static int sh_mobile_meram_runtime_suspend(struct device *dev)
{ {
struct platform_device *pdev = to_platform_device(dev); struct platform_device *pdev = to_platform_device(dev);
struct sh_mobile_meram_priv *priv = platform_get_drvdata(pdev); struct sh_mobile_meram_priv *priv = platform_get_drvdata(pdev);
unsigned int i, j; unsigned int i, j;
for (i = 0; i < CMN_REGS_SIZE; i++) for (i = 0; i < MERAM_REGS_SIZE; i++)
priv->regs[i] = meram_read_reg(priv->base, common_regs[i]); priv->regs[i] = meram_read_reg(priv->base, common_regs[i]);
for (i = 0; i < 32; i++) { for (i = 0; i < 32; i++) {
...@@ -583,7 +580,7 @@ static int sh_mobile_meram_runtime_resume(struct device *dev) ...@@ -583,7 +580,7 @@ static int sh_mobile_meram_runtime_resume(struct device *dev)
priv->icbs[i].regs[j]); priv->icbs[i].regs[j]);
} }
for (i = 0; i < CMN_REGS_SIZE; i++) for (i = 0; i < MERAM_REGS_SIZE; i++)
meram_write_reg(priv->base, common_regs[i], priv->regs[i]); meram_write_reg(priv->base, common_regs[i], priv->regs[i]);
return 0; return 0;
} }
...@@ -593,15 +590,8 @@ static const struct dev_pm_ops sh_mobile_meram_dev_pm_ops = { ...@@ -593,15 +590,8 @@ static const struct dev_pm_ops sh_mobile_meram_dev_pm_ops = {
.runtime_resume = sh_mobile_meram_runtime_resume, .runtime_resume = sh_mobile_meram_runtime_resume,
}; };
static struct sh_mobile_meram_ops sh_mobile_meram_ops = { /* -----------------------------------------------------------------------------
.module = THIS_MODULE, * Probe/remove and driver init/exit
.meram_register = sh_mobile_meram_register,
.meram_unregister = sh_mobile_meram_unregister,
.meram_update = sh_mobile_meram_update,
};
/*
* initialize MERAM
*/ */
static int __devinit sh_mobile_meram_probe(struct platform_device *pdev) static int __devinit sh_mobile_meram_probe(struct platform_device *pdev)
......
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