fbdev: sh_mobile_meram: Divide the code into sections
And rename a couple of constants to make prefixes more uniform.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
diff --git a/drivers/video/sh_mobile_meram.c b/drivers/video/sh_mobile_meram.c
index 0c5b301..30a3305 100644
--- a/drivers/video/sh_mobile_meram.c
+++ b/drivers/video/sh_mobile_meram.c
@@ -9,16 +9,20 @@
* for more details.
*/
+#include <linux/device.h>
+#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/module.h>
-#include <linux/device.h>
-#include <linux/pm_runtime.h>
-#include <linux/io.h>
-#include <linux/slab.h>
#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/slab.h>
+
#include <video/sh_mobile_meram.h>
-/* meram registers */
+/* -----------------------------------------------------------------------------
+ * MERAM registers
+ */
+
#define MEVCR1 0x4
#define MEVCR1_RST (1 << 31)
#define MEVCR1_WD (1 << 30)
@@ -81,14 +85,12 @@
((yszm1) << MExxBSIZE_YSZM1_SHIFT) | \
((xszm1) << MExxBSIZE_XSZM1_SHIFT))
-#define SH_MOBILE_MERAM_ICB_NUM 32
-
static const unsigned long common_regs[] = {
MEVCR1,
MEQSEL1,
MEQSEL2,
};
-#define CMN_REGS_SIZE ARRAY_SIZE(common_regs)
+#define MERAM_REGS_SIZE ARRAY_SIZE(common_regs)
static const unsigned long icb_regs[] = {
MExxCTL,
@@ -117,6 +119,8 @@
unsigned int current_reg;
};
+#define MERAM_ICB_NUM 32
+
/*
* sh_mobile_meram_priv - MERAM device
* @base: Registers base address
@@ -127,19 +131,19 @@
*/
struct sh_mobile_meram_priv {
void __iomem *base;
- unsigned long regs[CMN_REGS_SIZE];
+ unsigned long regs[MERAM_REGS_SIZE];
struct mutex lock;
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 */
-#define MERAM_SEC_LINE 15
-#define MERAM_LINE_WIDTH 2048
+#define MERAM_SEC_LINE 15
+#define MERAM_LINE_WIDTH 2048
-/*
- * MERAM/ICB access functions
+/* -----------------------------------------------------------------------------
+ * Registers access
*/
#define MERAM_ICB_OFFSET(base, idx, off) ((base) + (off) + (idx) * 0x20)
@@ -167,8 +171,8 @@
return ioread32(base + off);
}
-/*
- * register ICB
+/* -----------------------------------------------------------------------------
+ * Allocation
*/
#define MERAM_CACHE_START(p) ((p) >> 16)
@@ -176,10 +180,7 @@
#define MERAM_CACHE_SET(o, s) ((((o) & 0xffff) << 16) | \
(((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,
const struct sh_mobile_meram_icb_cfg *new)
{
@@ -194,7 +195,7 @@
test_bit(new->cache_icb, &priv->used_icb))
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))
continue;
@@ -211,10 +212,7 @@
return 0;
}
-/*
- * mark the specified ICB as used
- */
-
+/* Mark the specified ICB as used. */
static void meram_mark(struct sh_mobile_meram_priv *priv,
const struct sh_mobile_meram_icb_cfg *new,
int pixelformat)
@@ -230,10 +228,7 @@
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,
const struct sh_mobile_meram_icb_cfg *icb)
{
@@ -241,9 +236,7 @@
__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)
{
if (cspace == SH_MOBILE_MERAM_PF_NV ||
@@ -252,9 +245,7 @@
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,
const struct sh_mobile_meram_cfg *cfg,
unsigned long base_addr_y,
@@ -282,9 +273,7 @@
}
}
-/*
- * get the next ICB address
- */
+/* 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,
@@ -307,10 +296,7 @@
#define MERAM_CALC_BYTECOUNT(x, y) \
(((x) * (y) + (MERAM_LINE_WIDTH - 1)) & ~(MERAM_LINE_WIDTH - 1))
-/*
- * initialize MERAM
- */
-
+/* Initialize MERAM. */
static int meram_init(struct sh_mobile_meram_priv *priv,
const struct sh_mobile_meram_icb_cfg *icb,
unsigned int xres, unsigned int yres,
@@ -395,8 +381,8 @@
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,
@@ -545,13 +531,24 @@
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)
{
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 < CMN_REGS_SIZE; i++)
+ 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++) {
@@ -583,7 +580,7 @@
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]);
return 0;
}
@@ -593,15 +590,8 @@
.runtime_resume = sh_mobile_meram_runtime_resume,
};
-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
+/* -----------------------------------------------------------------------------
+ * Probe/remove and driver init/exit
*/
static int __devinit sh_mobile_meram_probe(struct platform_device *pdev)