diff options
Diffstat (limited to 'drivers/video/sh_mobile_meram.c')
| -rw-r--r-- | drivers/video/sh_mobile_meram.c | 686 |
1 files changed, 0 insertions, 686 deletions
diff --git a/drivers/video/sh_mobile_meram.c b/drivers/video/sh_mobile_meram.c deleted file mode 100644 index f45d83ecfd2..00000000000 --- a/drivers/video/sh_mobile_meram.c +++ /dev/null @@ -1,686 +0,0 @@ -/* - * 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/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 <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)) - -#define SH_MOBILE_MERAM_ICB_NUM 32 - -static unsigned long common_regs[] = { - MEVCR1, - MEQSEL1, - MEQSEL2, -}; -#define CMN_REGS_SIZE ARRAY_SIZE(common_regs) - -static unsigned long icb_regs[] = { - MExxCTL, - MExxBSIZE, - MExxMNCF, - MExxSARA, - MExxSARB, - MExxSBSIZE, -}; -#define ICB_REGS_SIZE ARRAY_SIZE(icb_regs) - -struct sh_mobile_meram_priv { - void __iomem *base; - struct mutex lock; - unsigned long used_icb; - int used_meram_cache_regions; - unsigned long used_meram_cache[SH_MOBILE_MERAM_ICB_NUM]; - unsigned long cmn_saved_regs[CMN_REGS_SIZE]; - unsigned long icb_saved_regs[ICB_REGS_SIZE * SH_MOBILE_MERAM_ICB_NUM]; -}; - -/* settings */ -#define MERAM_SEC_LINE 15 -#define MERAM_LINE_WIDTH 2048 - -/* - * MERAM/ICB access functions - */ - -#define MERAM_ICB_OFFSET(base, idx, off) ((base) + (off) + (idx) * 0x20) - -static inline void meram_write_icb(void __iomem *base, int idx, int off, - unsigned long val) -{ - iowrite32(val, MERAM_ICB_OFFSET(base, idx, off)); -} - -static inline unsigned long meram_read_icb(void __iomem *base, int idx, int off) -{ - return ioread32(MERAM_ICB_OFFSET(base, idx, off)); -} - -static inline void meram_write_reg(void __iomem *base, int off, - unsigned long val) -{ - iowrite32(val, base + off); -} - -static inline unsigned long meram_read_reg(void __iomem *base, int off) -{ - return ioread32(base + off); -} - -/* - * register ICB - */ - -#define MERAM_CACHE_START(p) ((p) >> 16) -#define MERAM_CACHE_END(p) ((p) & 0xffff) -#define MERAM_CACHE_SET(o, s) ((((o) & 0xffff) << 16) | \ - (((o) + (s) - 1) & 0xffff)) - -/* - * check if there's no overlaps in MERAM allocation. - */ - -static inline int meram_check_overlap(struct sh_mobile_meram_priv *priv, - struct sh_mobile_meram_icb *new) -{ - int i; - int used_start, used_end, meram_start, meram_end; - - /* 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; - - for (i = 0; i < priv->used_meram_cache_regions; i++) { - used_start = MERAM_CACHE_START(priv->used_meram_cache[i]); - used_end = MERAM_CACHE_END(priv->used_meram_cache[i]); - meram_start = new->meram_offset; - meram_end = new->meram_offset + new->meram_size; - - if ((meram_start >= used_start && meram_start < used_end) || - (meram_end > used_start && meram_end < used_end)) - return 1; - } - - return 0; -} - -/* - * mark the specified ICB as used - */ - -static inline void meram_mark(struct sh_mobile_meram_priv *priv, - struct sh_mobile_meram_icb *new) -{ - int n; - - if (new->marker_icb < 0 || new->cache_icb < 0) - return; - - __set_bit(new->marker_icb, &priv->used_icb); - __set_bit(new->cache_icb, &priv->used_icb); - - n = priv->used_meram_cache_regions; - - priv->used_meram_cache[n] = MERAM_CACHE_SET(new->meram_offset, - new->meram_size); - - priv->used_meram_cache_regions++; -} - -/* - * unmark the specified ICB as used - */ - -static inline void meram_unmark(struct sh_mobile_meram_priv *priv, - struct sh_mobile_meram_icb *icb) -{ - int i; - unsigned long pattern; - - if (icb->marker_icb < 0 || icb->cache_icb < 0) - return; - - __clear_bit(icb->marker_icb, &priv->used_icb); - __clear_bit(icb->cache_icb, &priv->used_icb); - - pattern = MERAM_CACHE_SET(icb->meram_offset, icb->meram_size); - for (i = 0; i < priv->used_meram_cache_regions; i++) { - if (priv->used_meram_cache[i] == pattern) { - while (i < priv->used_meram_cache_regions - 1) { - priv->used_meram_cache[i] = - priv->used_meram_cache[i + 1] ; - i++; - } - priv->used_meram_cache[i] = 0; - priv->used_meram_cache_regions--; - break; - } - } -} - -/* - * is this a YCbCr(NV12, NV16 or NV24) colorspace - */ -static inline 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 inline void meram_set_next_addr(struct sh_mobile_meram_priv *priv, - struct sh_mobile_meram_cfg *cfg, - unsigned long base_addr_y, - unsigned long base_addr_c) -{ - unsigned long target; - - target = (cfg->current_reg) ? MExxSARA : MExxSARB; - cfg->current_reg ^= 1; - - /* set the next address to fetch */ - meram_write_icb(priv->base, cfg->icb[0].cache_icb, target, - base_addr_y); - meram_write_icb(priv->base, cfg->icb[0].marker_icb, target, - base_addr_y + cfg->icb[0].cache_unit); - - if (is_nvcolor(cfg->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 + cfg->icb[1].cache_unit); - } -} - -/* - * get the next ICB address - */ -static inline void meram_get_next_icb_addr(struct sh_mobile_meram_info *pdata, - struct sh_mobile_meram_cfg *cfg, - unsigned long *icb_addr_y, - unsigned long *icb_addr_c) -{ - unsigned long icb_offset; - - if (pdata->addr_mode == SH_MOBILE_MERAM_MODE0) - icb_offset = 0x80000000 | (cfg->current_reg << 29); - else - icb_offset = 0xc0000000 | (cfg->current_reg << 23); - - *icb_addr_y = icb_offset | (cfg->icb[0].marker_icb << 24); - if (is_nvcolor(cfg->pixelformat)) - *icb_addr_c = icb_offset | (cfg->icb[1].marker_icb << 24); -} - -#define MERAM_CALC_BYTECOUNT(x, y) \ - (((x) * (y) + (MERAM_LINE_WIDTH - 1)) & ~(MERAM_LINE_WIDTH - 1)) - -/* - * initialize MERAM - */ - -static int meram_init(struct sh_mobile_meram_priv *priv, - struct sh_mobile_meram_icb *icb, - int xres, int yres, int *out_pitch) -{ - unsigned long total_byte_count = MERAM_CALC_BYTECOUNT(xres, yres); - unsigned long bnm; - int lcdc_pitch, xpitch, line_cnt; - 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 = (icb->meram_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 &= 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_MExxBSIZE_VAL(0x0, line_cnt - 1, xpitch - 1)); - meram_write_icb(priv->base, icb->marker_icb, 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, icb->cache_icb, MExxSBSIZE, xpitch); - meram_write_icb(priv->base, icb->marker_icb, MExxSBSIZE, xpitch); - - /* save a cache unit size */ - icb->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, icb->meram_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, icb->meram_offset + - icb->meram_size / 2) | - MExxCTL_WD1 | MExxCTL_WD0 | MExxCTL_WS | MExxCTL_CM | - MExxCTL_MD_FB); - - return 0; -} - -static void meram_deinit(struct sh_mobile_meram_priv *priv, - struct sh_mobile_meram_icb *icb) -{ - /* disable ICB */ - meram_write_icb(priv->base, icb->cache_icb, MExxCTL, - MExxCTL_WBF | MExxCTL_WF | MExxCTL_RF); - meram_write_icb(priv->base, icb->marker_icb, MExxCTL, - MExxCTL_WBF | MExxCTL_WF | MExxCTL_RF); - icb->cache_unit = 0; -} - -/* - * register the ICB - */ - -static int sh_mobile_meram_register(struct sh_mobile_meram_info *pdata, - struct sh_mobile_meram_cfg *cfg, - int xres, int yres, int pixelformat, - unsigned long base_addr_y, - unsigned long base_addr_c, - unsigned long *icb_addr_y, - unsigned long *icb_addr_c, - int *pitch) -{ - struct platform_device *pdev; - struct sh_mobile_meram_priv *priv; - int n, out_pitch; - int error = 0; - - if (!pdata || !pdata->priv || !pdata->pdev || !cfg) - return -EINVAL; - - if (pixelformat != SH_MOBILE_MERAM_PF_NV && - pixelformat != SH_MOBILE_MERAM_PF_NV24 && - pixelformat != SH_MOBILE_MERAM_PF_RGB) - return -EINVAL; - - priv = pdata->priv; - pdev = pdata->pdev; - - dev_dbg(&pdev->dev, "registering %dx%d (%s) (y=%08lx, c=%08lx)", - xres, yres, (!pixelformat) ? "yuv" : "rgb", - base_addr_y, base_addr_c); - - /* 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; - } - - mutex_lock(&priv->lock); - - if (priv->used_meram_cache_regions + 2 > SH_MOBILE_MERAM_ICB_NUM) { - dev_err(&pdev->dev, "no more ICB available."); - error = -EINVAL; - goto err; - } - - /* 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 ICB */ - cfg->pixelformat = pixelformat; - meram_mark(priv, &cfg->icb[0]); - if (is_nvcolor(pixelformat)) - meram_mark(priv, &cfg->icb[1]); - - /* initialize MERAM */ - meram_init(priv, &cfg->icb[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, - &out_pitch); - else if (pixelformat == SH_MOBILE_MERAM_PF_NV24) - meram_init(priv, &cfg->icb[1], 2 * xres, (yres + 1) / 2, - &out_pitch); - - cfg->current_reg = 1; - 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); - - 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; -} - -static int sh_mobile_meram_unregister(struct sh_mobile_meram_info *pdata, - struct sh_mobile_meram_cfg *cfg) -{ - struct sh_mobile_meram_priv *priv; - - if (!pdata || !pdata->priv || !cfg) - return -EINVAL; - - priv = pdata->priv; - - mutex_lock(&priv->lock); - - /* deinit & unmark */ - if (is_nvcolor(cfg->pixelformat)) { - meram_deinit(priv, &cfg->icb[1]); - meram_unmark(priv, &cfg->icb[1]); - } - meram_deinit(priv, &cfg->icb[0]); - meram_unmark(priv, &cfg->icb[0]); - - mutex_unlock(&priv->lock); - - return 0; -} - -static int sh_mobile_meram_update(struct sh_mobile_meram_info *pdata, - 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) -{ - struct sh_mobile_meram_priv *priv; - - if (!pdata || !pdata->priv || !cfg) - 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); - - mutex_unlock(&priv->lock); - - return 0; -} - -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); - int k, j; - - for (k = 0; k < CMN_REGS_SIZE; k++) - priv->cmn_saved_regs[k] = meram_read_reg(priv->base, - common_regs[k]); - - for (j = 0; j < 32; j++) { - if (!test_bit(j, &priv->used_icb)) - continue; - for (k = 0; k < ICB_REGS_SIZE; k++) { - priv->icb_saved_regs[j * ICB_REGS_SIZE + k] = - meram_read_icb(priv->base, j, icb_regs[k]); - /* Reset ICB on resume */ - if (icb_regs[k] == MExxCTL) - priv->icb_saved_regs[j * ICB_REGS_SIZE + k] |= - MExxCTL_WBF | MExxCTL_WF | MExxCTL_RF; - } - } - return 0; -} - -static int sh_mobile_meram_runtime_resume(struct device *dev) -{ - struct platform_device *pdev = to_platform_device(dev); - struct sh_mobile_meram_priv *priv = platform_get_drvdata(pdev); - int k, j; - - for (j = 0; j < 32; j++) { - if (!test_bit(j, &priv->used_icb)) - continue; - for (k = 0; k < ICB_REGS_SIZE; k++) { - meram_write_icb(priv->base, j, icb_regs[k], - priv->icb_saved_regs[j * ICB_REGS_SIZE + k]); - } - } - - for (k = 0; k < CMN_REGS_SIZE; k++) - meram_write_reg(priv->base, common_regs[k], - priv->cmn_saved_regs[k]); - return 0; -} - -static const struct dev_pm_ops sh_mobile_meram_dev_pm_ops = { - .runtime_suspend = sh_mobile_meram_runtime_suspend, - .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 - */ - -static int sh_mobile_meram_remove(struct platform_device *pdev); - -static int __devinit 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 *res; - int error; - - if (!pdata) { - dev_err(&pdev->dev, "no platform data defined\n"); - return -EINVAL; - } - - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!res) { - 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; - } - - platform_set_drvdata(pdev, priv); - - /* initialize private data */ - mutex_init(&priv->lock); - priv->base = ioremap_nocache(res->start, resource_size(res)); - if (!priv->base) { - dev_err(&pdev->dev, "ioremap failed\n"); - error = -EFAULT; - goto err; - } - pdata->ops = &sh_mobile_meram_ops; - pdata->priv = priv; - pdata->pdev = pdev; - - /* initialize ICB addressing mode */ - if (pdata->addr_mode == SH_MOBILE_MERAM_MODE1) - meram_write_reg(priv->base, MEVCR1, MEVCR1_AMD1); - - pm_runtime_enable(&pdev->dev); - - dev_info(&pdev->dev, "sh_mobile_meram initialized."); - - return 0; - -err: - sh_mobile_meram_remove(pdev); - - return error; -} - - -static int sh_mobile_meram_remove(struct platform_device *pdev) -{ - struct sh_mobile_meram_priv *priv = platform_get_drvdata(pdev); - - pm_runtime_disable(&pdev->dev); - - if (priv->base) - iounmap(priv->base); - - mutex_destroy(&priv->lock); - - kfree(priv); - - return 0; -} - -static struct platform_driver sh_mobile_meram_driver = { - .driver = { - .name = "sh_mobile_meram", - .owner = THIS_MODULE, - .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"); |