diff options
author | Laurent Pinchart <laurent.pinchart@ideasonboard.com> | 2011-09-19 11:40:31 +0200 |
---|---|---|
committer | Laurent Pinchart <laurent.pinchart@ideasonboard.com> | 2012-03-12 22:41:10 +0100 |
commit | 7554340c7acae4a719b1b70b0defa3c67149610b (patch) | |
tree | cf3fb0d2fd28fdfe2d2e48b9951b7fd2f3e67b7a /drivers/video/sh_mobile_meram.c | |
parent | 762f7cc94bc5c5c8c54f9d0073a07a275b106d89 (diff) |
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>
Diffstat (limited to 'drivers/video/sh_mobile_meram.c')
-rw-r--r-- | drivers/video/sh_mobile_meram.c | 98 |
1 files changed, 44 insertions, 54 deletions
diff --git a/drivers/video/sh_mobile_meram.c b/drivers/video/sh_mobile_meram.c index 0c5b301697e1..30a3305ba366 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/platform_device.h> #include <linux/pm_runtime.h> -#include <linux/io.h> #include <linux/slab.h> -#include <linux/platform_device.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 @@ struct sh_mobile_meram_icb { 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_icb { */ 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 @@ static inline unsigned long meram_read_reg(void __iomem *base, unsigned int off) return ioread32(base + off); } -/* - * register ICB +/* ----------------------------------------------------------------------------- + * Allocation */ #define MERAM_CACHE_START(p) ((p) >> 16) @@ -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) | \ (((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 @@ static int meram_check_overlap(struct sh_mobile_meram_priv *priv, 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 @@ static int meram_check_overlap(struct sh_mobile_meram_priv *priv, 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 @@ static void meram_mark(struct sh_mobile_meram_priv *priv, 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 @@ static void meram_unmark(struct sh_mobile_meram_priv *priv, __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 @@ static int is_nvcolor(int cspace) 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 @@ static void meram_set_next_addr(struct sh_mobile_meram_priv *priv, } } -/* - * 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 @@ meram_get_next_icb_addr(struct sh_mobile_meram_info *pdata, #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 @@ static void meram_deinit(struct sh_mobile_meram_priv *priv, 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 @@ static int sh_mobile_meram_update(struct sh_mobile_meram_info *pdata, 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 @@ static int sh_mobile_meram_runtime_resume(struct device *dev) 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 @@ static const struct dev_pm_ops sh_mobile_meram_dev_pm_ops = { .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) |