diff options
Diffstat (limited to 'drivers/video/fbdev/mxsfb.c')
| -rw-r--r-- | drivers/video/fbdev/mxsfb.c | 1028 |
1 files changed, 0 insertions, 1028 deletions
diff --git a/drivers/video/fbdev/mxsfb.c b/drivers/video/fbdev/mxsfb.c deleted file mode 100644 index d8bebe35b410..000000000000 --- a/drivers/video/fbdev/mxsfb.c +++ /dev/null @@ -1,1028 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-or-later -/* - * Copyright (C) 2010 Juergen Beisert, Pengutronix - * - * This code is based on: - * Author: Vitaly Wool <vital@embeddedalley.com> - * - * Copyright 2008-2009 Freescale Semiconductor, Inc. All Rights Reserved. - * Copyright 2008 Embedded Alley Solutions, Inc All Rights Reserved. - */ - -#define DRIVER_NAME "mxsfb" - -/** - * @file - * @brief LCDIF driver for i.MX23 and i.MX28 - * - * The LCDIF support four modes of operation - * - MPU interface (to drive smart displays) -> not supported yet - * - VSYNC interface (like MPU interface plus Vsync) -> not supported yet - * - Dotclock interface (to drive LC displays with RGB data and sync signals) - * - DVI (to drive ITU-R BT656) -> not supported yet - * - * This driver depends on a correct setup of the pins used for this purpose - * (platform specific). - * - * For the developer: Don't forget to set the data bus width to the display - * in the imx_fb_videomode structure. You will else end up with ugly colours. - * If you fight against jitter you can vary the clock delay. This is a feature - * of the i.MX28 and you can vary it between 2 ns ... 8 ns in 2 ns steps. Give - * the required value in the imx_fb_videomode structure. - */ - -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/of_device.h> -#include <linux/platform_device.h> -#include <linux/clk.h> -#include <linux/dma-mapping.h> -#include <linux/io.h> -#include <linux/fb.h> -#include <linux/regulator/consumer.h> -#include <video/of_display_timing.h> -#include <video/of_videomode.h> -#include <video/videomode.h> - -#define REG_SET 4 -#define REG_CLR 8 - -#define LCDC_CTRL 0x00 -#define LCDC_CTRL1 0x10 -#define LCDC_V4_CTRL2 0x20 -#define LCDC_V3_TRANSFER_COUNT 0x20 -#define LCDC_V4_TRANSFER_COUNT 0x30 -#define LCDC_V4_CUR_BUF 0x40 -#define LCDC_V4_NEXT_BUF 0x50 -#define LCDC_V3_CUR_BUF 0x30 -#define LCDC_V3_NEXT_BUF 0x40 -#define LCDC_TIMING 0x60 -#define LCDC_VDCTRL0 0x70 -#define LCDC_VDCTRL1 0x80 -#define LCDC_VDCTRL2 0x90 -#define LCDC_VDCTRL3 0xa0 -#define LCDC_VDCTRL4 0xb0 -#define LCDC_DVICTRL0 0xc0 -#define LCDC_DVICTRL1 0xd0 -#define LCDC_DVICTRL2 0xe0 -#define LCDC_DVICTRL3 0xf0 -#define LCDC_DVICTRL4 0x100 -#define LCDC_V4_DATA 0x180 -#define LCDC_V3_DATA 0x1b0 -#define LCDC_V4_DEBUG0 0x1d0 -#define LCDC_V3_DEBUG0 0x1f0 - -#define CTRL_SFTRST (1 << 31) -#define CTRL_CLKGATE (1 << 30) -#define CTRL_BYPASS_COUNT (1 << 19) -#define CTRL_VSYNC_MODE (1 << 18) -#define CTRL_DOTCLK_MODE (1 << 17) -#define CTRL_DATA_SELECT (1 << 16) -#define CTRL_SET_BUS_WIDTH(x) (((x) & 0x3) << 10) -#define CTRL_GET_BUS_WIDTH(x) (((x) >> 10) & 0x3) -#define CTRL_SET_WORD_LENGTH(x) (((x) & 0x3) << 8) -#define CTRL_GET_WORD_LENGTH(x) (((x) >> 8) & 0x3) -#define CTRL_MASTER (1 << 5) -#define CTRL_DF16 (1 << 3) -#define CTRL_DF18 (1 << 2) -#define CTRL_DF24 (1 << 1) -#define CTRL_RUN (1 << 0) - -#define CTRL1_FIFO_CLEAR (1 << 21) -#define CTRL1_SET_BYTE_PACKAGING(x) (((x) & 0xf) << 16) -#define CTRL1_GET_BYTE_PACKAGING(x) (((x) >> 16) & 0xf) - -#define TRANSFER_COUNT_SET_VCOUNT(x) (((x) & 0xffff) << 16) -#define TRANSFER_COUNT_GET_VCOUNT(x) (((x) >> 16) & 0xffff) -#define TRANSFER_COUNT_SET_HCOUNT(x) ((x) & 0xffff) -#define TRANSFER_COUNT_GET_HCOUNT(x) ((x) & 0xffff) - - -#define VDCTRL0_ENABLE_PRESENT (1 << 28) -#define VDCTRL0_VSYNC_ACT_HIGH (1 << 27) -#define VDCTRL0_HSYNC_ACT_HIGH (1 << 26) -#define VDCTRL0_DOTCLK_ACT_FALLING (1 << 25) -#define VDCTRL0_ENABLE_ACT_HIGH (1 << 24) -#define VDCTRL0_VSYNC_PERIOD_UNIT (1 << 21) -#define VDCTRL0_VSYNC_PULSE_WIDTH_UNIT (1 << 20) -#define VDCTRL0_HALF_LINE (1 << 19) -#define VDCTRL0_HALF_LINE_MODE (1 << 18) -#define VDCTRL0_SET_VSYNC_PULSE_WIDTH(x) ((x) & 0x3ffff) -#define VDCTRL0_GET_VSYNC_PULSE_WIDTH(x) ((x) & 0x3ffff) - -#define VDCTRL2_SET_HSYNC_PERIOD(x) ((x) & 0x3ffff) -#define VDCTRL2_GET_HSYNC_PERIOD(x) ((x) & 0x3ffff) - -#define VDCTRL3_MUX_SYNC_SIGNALS (1 << 29) -#define VDCTRL3_VSYNC_ONLY (1 << 28) -#define SET_HOR_WAIT_CNT(x) (((x) & 0xfff) << 16) -#define GET_HOR_WAIT_CNT(x) (((x) >> 16) & 0xfff) -#define SET_VERT_WAIT_CNT(x) ((x) & 0xffff) -#define GET_VERT_WAIT_CNT(x) ((x) & 0xffff) - -#define VDCTRL4_SET_DOTCLK_DLY(x) (((x) & 0x7) << 29) /* v4 only */ -#define VDCTRL4_GET_DOTCLK_DLY(x) (((x) >> 29) & 0x7) /* v4 only */ -#define VDCTRL4_SYNC_SIGNALS_ON (1 << 18) -#define SET_DOTCLK_H_VALID_DATA_CNT(x) ((x) & 0x3ffff) - -#define DEBUG0_HSYNC (1 < 26) -#define DEBUG0_VSYNC (1 < 25) - -#define MIN_XRES 120 -#define MIN_YRES 120 - -#define RED 0 -#define GREEN 1 -#define BLUE 2 -#define TRANSP 3 - -#define STMLCDIF_8BIT 1 /** pixel data bus to the display is of 8 bit width */ -#define STMLCDIF_16BIT 0 /** pixel data bus to the display is of 16 bit width */ -#define STMLCDIF_18BIT 2 /** pixel data bus to the display is of 18 bit width */ -#define STMLCDIF_24BIT 3 /** pixel data bus to the display is of 24 bit width */ - -#define MXSFB_SYNC_DATA_ENABLE_HIGH_ACT (1 << 6) -#define MXSFB_SYNC_DOTCLK_FALLING_ACT (1 << 7) /* negative edge sampling */ - -enum mxsfb_devtype { - MXSFB_V3, - MXSFB_V4, -}; - -/* CPU dependent register offsets */ -struct mxsfb_devdata { - unsigned transfer_count; - unsigned cur_buf; - unsigned next_buf; - unsigned debug0; - unsigned hs_wdth_mask; - unsigned hs_wdth_shift; - unsigned ipversion; -}; - -struct mxsfb_info { - struct platform_device *pdev; - struct clk *clk; - struct clk *clk_axi; - struct clk *clk_disp_axi; - void __iomem *base; /* registers */ - unsigned allocated_size; - int enabled; - unsigned ld_intf_width; - unsigned dotclk_delay; - const struct mxsfb_devdata *devdata; - u32 sync; - struct regulator *reg_lcd; - int pre_init; -}; - -#define mxsfb_is_v3(host) (host->devdata->ipversion == 3) -#define mxsfb_is_v4(host) (host->devdata->ipversion == 4) - -static const struct mxsfb_devdata mxsfb_devdata[] = { - [MXSFB_V3] = { - .transfer_count = LCDC_V3_TRANSFER_COUNT, - .cur_buf = LCDC_V3_CUR_BUF, - .next_buf = LCDC_V3_NEXT_BUF, - .debug0 = LCDC_V3_DEBUG0, - .hs_wdth_mask = 0xff, - .hs_wdth_shift = 24, - .ipversion = 3, - }, - [MXSFB_V4] = { - .transfer_count = LCDC_V4_TRANSFER_COUNT, - .cur_buf = LCDC_V4_CUR_BUF, - .next_buf = LCDC_V4_NEXT_BUF, - .debug0 = LCDC_V4_DEBUG0, - .hs_wdth_mask = 0x3fff, - .hs_wdth_shift = 18, - .ipversion = 4, - }, -}; - -/* mask and shift depends on architecture */ -static inline u32 set_hsync_pulse_width(struct mxsfb_info *host, unsigned val) -{ - return (val & host->devdata->hs_wdth_mask) << - host->devdata->hs_wdth_shift; -} - -static inline u32 get_hsync_pulse_width(struct mxsfb_info *host, unsigned val) -{ - return (val >> host->devdata->hs_wdth_shift) & - host->devdata->hs_wdth_mask; -} - -static const struct fb_bitfield def_rgb565[] = { - [RED] = { - .offset = 11, - .length = 5, - }, - [GREEN] = { - .offset = 5, - .length = 6, - }, - [BLUE] = { - .offset = 0, - .length = 5, - }, - [TRANSP] = { /* no support for transparency */ - .length = 0, - } -}; - -static const struct fb_bitfield def_rgb888[] = { - [RED] = { - .offset = 16, - .length = 8, - }, - [GREEN] = { - .offset = 8, - .length = 8, - }, - [BLUE] = { - .offset = 0, - .length = 8, - }, - [TRANSP] = { /* no support for transparency */ - .length = 0, - } -}; - -static inline unsigned chan_to_field(unsigned chan, struct fb_bitfield *bf) -{ - chan &= 0xffff; - chan >>= 16 - bf->length; - return chan << bf->offset; -} - -static int mxsfb_check_var(struct fb_var_screeninfo *var, - struct fb_info *fb_info) -{ - struct mxsfb_info *host = fb_info->par; - const struct fb_bitfield *rgb = NULL; - - if (var->xres < MIN_XRES) - var->xres = MIN_XRES; - if (var->yres < MIN_YRES) - var->yres = MIN_YRES; - - var->xres_virtual = var->xres; - - var->yres_virtual = var->yres; - - switch (var->bits_per_pixel) { - case 16: - /* always expect RGB 565 */ - rgb = def_rgb565; - break; - case 32: - switch (host->ld_intf_width) { - case STMLCDIF_8BIT: - pr_debug("Unsupported LCD bus width mapping\n"); - break; - case STMLCDIF_16BIT: - case STMLCDIF_18BIT: - case STMLCDIF_24BIT: - /* real 24 bit */ - rgb = def_rgb888; - break; - } - break; - default: - pr_err("Unsupported colour depth: %u\n", var->bits_per_pixel); - return -EINVAL; - } - - /* - * Copy the RGB parameters for this display - * from the machine specific parameters. - */ - var->red = rgb[RED]; - var->green = rgb[GREEN]; - var->blue = rgb[BLUE]; - var->transp = rgb[TRANSP]; - - return 0; -} - -static inline void mxsfb_enable_axi_clk(struct mxsfb_info *host) -{ - if (host->clk_axi) - clk_prepare_enable(host->clk_axi); -} - -static inline void mxsfb_disable_axi_clk(struct mxsfb_info *host) -{ - if (host->clk_axi) - clk_disable_unprepare(host->clk_axi); -} - -static void mxsfb_enable_controller(struct fb_info *fb_info) -{ - struct mxsfb_info *host = fb_info->par; - u32 reg; - int ret; - - dev_dbg(&host->pdev->dev, "%s\n", __func__); - - if (host->reg_lcd) { - ret = regulator_enable(host->reg_lcd); - if (ret) { - dev_err(&host->pdev->dev, - "lcd regulator enable failed: %d\n", ret); - return; - } - } - - if (host->clk_disp_axi) - clk_prepare_enable(host->clk_disp_axi); - clk_prepare_enable(host->clk); - clk_set_rate(host->clk, PICOS2KHZ(fb_info->var.pixclock) * 1000U); - - mxsfb_enable_axi_clk(host); - - /* if it was disabled, re-enable the mode again */ - writel(CTRL_DOTCLK_MODE, host->base + LCDC_CTRL + REG_SET); - - /* enable the SYNC signals first, then the DMA engine */ - reg = readl(host->base + LCDC_VDCTRL4); - reg |= VDCTRL4_SYNC_SIGNALS_ON; - writel(reg, host->base + LCDC_VDCTRL4); - - writel(CTRL_RUN, host->base + LCDC_CTRL + REG_SET); - - host->enabled = 1; -} - -static void mxsfb_disable_controller(struct fb_info *fb_info) -{ - struct mxsfb_info *host = fb_info->par; - unsigned loop; - u32 reg; - int ret; - - dev_dbg(&host->pdev->dev, "%s\n", __func__); - - /* - * Even if we disable the controller here, it will still continue - * until its FIFOs are running out of data - */ - writel(CTRL_DOTCLK_MODE, host->base + LCDC_CTRL + REG_CLR); - - loop = 1000; - while (loop) { - reg = readl(host->base + LCDC_CTRL); - if (!(reg & CTRL_RUN)) - break; - loop--; - } - - reg = readl(host->base + LCDC_VDCTRL4); - writel(reg & ~VDCTRL4_SYNC_SIGNALS_ON, host->base + LCDC_VDCTRL4); - - mxsfb_disable_axi_clk(host); - - clk_disable_unprepare(host->clk); - if (host->clk_disp_axi) - clk_disable_unprepare(host->clk_disp_axi); - - host->enabled = 0; - - if (host->reg_lcd) { - ret = regulator_disable(host->reg_lcd); - if (ret) - dev_err(&host->pdev->dev, - "lcd regulator disable failed: %d\n", ret); - } -} - -static int mxsfb_set_par(struct fb_info *fb_info) -{ - struct mxsfb_info *host = fb_info->par; - u32 ctrl, vdctrl0, vdctrl4; - int line_size, fb_size; - int reenable = 0; - - line_size = fb_info->var.xres * (fb_info->var.bits_per_pixel >> 3); - fb_size = fb_info->var.yres_virtual * line_size; - - if (fb_size > fb_info->fix.smem_len) - return -ENOMEM; - - fb_info->fix.line_length = line_size; - - if (host->pre_init) { - mxsfb_enable_controller(fb_info); - host->pre_init = 0; - return 0; - } - - /* - * It seems, you can't re-program the controller if it is still running. - * This may lead into shifted pictures (FIFO issue?). - * So, first stop the controller and drain its FIFOs - */ - if (host->enabled) { - reenable = 1; - mxsfb_disable_controller(fb_info); - } - - mxsfb_enable_axi_clk(host); - - /* clear the FIFOs */ - writel(CTRL1_FIFO_CLEAR, host->base + LCDC_CTRL1 + REG_SET); - - ctrl = CTRL_BYPASS_COUNT | CTRL_MASTER | - CTRL_SET_BUS_WIDTH(host->ld_intf_width); - - switch (fb_info->var.bits_per_pixel) { - case 16: - dev_dbg(&host->pdev->dev, "Setting up RGB565 mode\n"); - ctrl |= CTRL_SET_WORD_LENGTH(0); - writel(CTRL1_SET_BYTE_PACKAGING(0xf), host->base + LCDC_CTRL1); - break; - case 32: - dev_dbg(&host->pdev->dev, "Setting up RGB888/666 mode\n"); - ctrl |= CTRL_SET_WORD_LENGTH(3); - switch (host->ld_intf_width) { - case STMLCDIF_8BIT: - mxsfb_disable_axi_clk(host); - dev_err(&host->pdev->dev, - "Unsupported LCD bus width mapping\n"); - return -EINVAL; - case STMLCDIF_16BIT: - case STMLCDIF_18BIT: - case STMLCDIF_24BIT: - /* real 24 bit */ - break; - } - /* do not use packed pixels = one pixel per word instead */ - writel(CTRL1_SET_BYTE_PACKAGING(0x7), host->base + LCDC_CTRL1); - break; - default: - mxsfb_disable_axi_clk(host); - dev_err(&host->pdev->dev, "Unhandled color depth of %u\n", - fb_info->var.bits_per_pixel); - return -EINVAL; - } - - writel(ctrl, host->base + LCDC_CTRL); - - writel(TRANSFER_COUNT_SET_VCOUNT(fb_info->var.yres) | - TRANSFER_COUNT_SET_HCOUNT(fb_info->var.xres), - host->base + host->devdata->transfer_count); - - vdctrl0 = VDCTRL0_ENABLE_PRESENT | /* always in DOTCLOCK mode */ - VDCTRL0_VSYNC_PERIOD_UNIT | - VDCTRL0_VSYNC_PULSE_WIDTH_UNIT | - VDCTRL0_SET_VSYNC_PULSE_WIDTH(fb_info->var.vsync_len); - if (fb_info->var.sync & FB_SYNC_HOR_HIGH_ACT) - vdctrl0 |= VDCTRL0_HSYNC_ACT_HIGH; - if (fb_info->var.sync & FB_SYNC_VERT_HIGH_ACT) - vdctrl0 |= VDCTRL0_VSYNC_ACT_HIGH; - if (host->sync & MXSFB_SYNC_DATA_ENABLE_HIGH_ACT) - vdctrl0 |= VDCTRL0_ENABLE_ACT_HIGH; - if (host->sync & MXSFB_SYNC_DOTCLK_FALLING_ACT) - vdctrl0 |= VDCTRL0_DOTCLK_ACT_FALLING; - - writel(vdctrl0, host->base + LCDC_VDCTRL0); - - /* frame length in lines */ - writel(fb_info->var.upper_margin + fb_info->var.vsync_len + - fb_info->var.lower_margin + fb_info->var.yres, - host->base + LCDC_VDCTRL1); - - /* line length in units of clocks or pixels */ - writel(set_hsync_pulse_width(host, fb_info->var.hsync_len) | - VDCTRL2_SET_HSYNC_PERIOD(fb_info->var.left_margin + - fb_info->var.hsync_len + fb_info->var.right_margin + - fb_info->var.xres), - host->base + LCDC_VDCTRL2); - - writel(SET_HOR_WAIT_CNT(fb_info->var.left_margin + - fb_info->var.hsync_len) | - SET_VERT_WAIT_CNT(fb_info->var.upper_margin + - fb_info->var.vsync_len), - host->base + LCDC_VDCTRL3); - - vdctrl4 = SET_DOTCLK_H_VALID_DATA_CNT(fb_info->var.xres); - if (mxsfb_is_v4(host)) - vdctrl4 |= VDCTRL4_SET_DOTCLK_DLY(host->dotclk_delay); - writel(vdctrl4, host->base + LCDC_VDCTRL4); - - writel(fb_info->fix.smem_start + - fb_info->fix.line_length * fb_info->var.yoffset, - host->base + host->devdata->next_buf); - - mxsfb_disable_axi_clk(host); - - if (reenable) - mxsfb_enable_controller(fb_info); - - return 0; -} - -static int mxsfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue, - u_int transp, struct fb_info *fb_info) -{ - unsigned int val; - int ret = -EINVAL; - - /* - * If greyscale is true, then we convert the RGB value - * to greyscale no matter what visual we are using. - */ - if (fb_info->var.grayscale) - red = green = blue = (19595 * red + 38470 * green + - 7471 * blue) >> 16; - - switch (fb_info->fix.visual) { - case FB_VISUAL_TRUECOLOR: - /* - * 12 or 16-bit True Colour. We encode the RGB value - * according to the RGB bitfield information. - */ - if (regno < 16) { - u32 *pal = fb_info->pseudo_palette; - - val = chan_to_field(red, &fb_info->var.red); - val |= chan_to_field(green, &fb_info->var.green); - val |= chan_to_field(blue, &fb_info->var.blue); - - pal[regno] = val; - ret = 0; - } - break; - - case FB_VISUAL_STATIC_PSEUDOCOLOR: - case FB_VISUAL_PSEUDOCOLOR: - break; - } - - return ret; -} - -static int mxsfb_blank(int blank, struct fb_info *fb_info) -{ - struct mxsfb_info *host = fb_info->par; - - switch (blank) { - case FB_BLANK_POWERDOWN: - case FB_BLANK_VSYNC_SUSPEND: - case FB_BLANK_HSYNC_SUSPEND: - case FB_BLANK_NORMAL: - if (host->enabled) - mxsfb_disable_controller(fb_info); - break; - - case FB_BLANK_UNBLANK: - if (!host->enabled) - mxsfb_enable_controller(fb_info); - break; - } - return 0; -} - -static int mxsfb_pan_display(struct fb_var_screeninfo *var, - struct fb_info *fb_info) -{ - struct mxsfb_info *host = fb_info->par; - unsigned offset; - - if (var->xoffset != 0) - return -EINVAL; - - offset = fb_info->fix.line_length * var->yoffset; - - mxsfb_enable_axi_clk(host); - - /* update on next VSYNC */ - writel(fb_info->fix.smem_start + offset, - host->base + host->devdata->next_buf); - - mxsfb_disable_axi_clk(host); - - return 0; -} - -static struct fb_ops mxsfb_ops = { - .owner = THIS_MODULE, - .fb_check_var = mxsfb_check_var, - .fb_set_par = mxsfb_set_par, - .fb_setcolreg = mxsfb_setcolreg, - .fb_blank = mxsfb_blank, - .fb_pan_display = mxsfb_pan_display, - .fb_fillrect = cfb_fillrect, - .fb_copyarea = cfb_copyarea, - .fb_imageblit = cfb_imageblit, -}; - -static int mxsfb_restore_mode(struct fb_info *fb_info, - struct fb_videomode *vmode) -{ - struct mxsfb_info *host = fb_info->par; - unsigned period; - unsigned long pa, fbsize; - int bits_per_pixel, ofs, ret = 0; - u32 transfer_count, vdctrl0, vdctrl2, vdctrl3, vdctrl4, ctrl; - - mxsfb_enable_axi_clk(host); - - /* Only restore the mode when the controller is running */ - ctrl = readl(host->base + LCDC_CTRL); - if (!(ctrl & CTRL_RUN)) { - ret = -EINVAL; - goto err; - } - - vdctrl0 = readl(host->base + LCDC_VDCTRL0); - vdctrl2 = readl(host->base + LCDC_VDCTRL2); - vdctrl3 = readl(host->base + LCDC_VDCTRL3); - vdctrl4 = readl(host->base + LCDC_VDCTRL4); - - transfer_count = readl(host->base + host->devdata->transfer_count); - - vmode->xres = TRANSFER_COUNT_GET_HCOUNT(transfer_count); - vmode->yres = TRANSFER_COUNT_GET_VCOUNT(transfer_count); - - switch (CTRL_GET_WORD_LENGTH(ctrl)) { - case 0: - bits_per_pixel = 16; - break; - case 3: - bits_per_pixel = 32; - break; - case 1: - default: - ret = -EINVAL; - goto err; - } - - fb_info->var.bits_per_pixel = bits_per_pixel; - - vmode->pixclock = KHZ2PICOS(clk_get_rate(host->clk) / 1000U); - vmode->hsync_len = get_hsync_pulse_width(host, vdctrl2); - vmode->left_margin = GET_HOR_WAIT_CNT(vdctrl3) - vmode->hsync_len; - vmode->right_margin = VDCTRL2_GET_HSYNC_PERIOD(vdctrl2) - - vmode->hsync_len - vmode->left_margin - vmode->xres; - vmode->vsync_len = VDCTRL0_GET_VSYNC_PULSE_WIDTH(vdctrl0); - period = readl(host->base + LCDC_VDCTRL1); - vmode->upper_margin = GET_VERT_WAIT_CNT(vdctrl3) - vmode->vsync_len; - vmode->lower_margin = period - vmode->vsync_len - - vmode->upper_margin - vmode->yres; - - vmode->vmode = FB_VMODE_NONINTERLACED; - - vmode->sync = 0; - if (vdctrl0 & VDCTRL0_HSYNC_ACT_HIGH) - vmode->sync |= FB_SYNC_HOR_HIGH_ACT; - if (vdctrl0 & VDCTRL0_VSYNC_ACT_HIGH) - vmode->sync |= FB_SYNC_VERT_HIGH_ACT; - - pr_debug("Reconstructed video mode:\n"); - pr_debug("%dx%d, hsync: %u left: %u, right: %u, vsync: %u, upper: %u, lower: %u\n", - vmode->xres, vmode->yres, vmode->hsync_len, vmode->left_margin, - vmode->right_margin, vmode->vsync_len, vmode->upper_margin, - vmode->lower_margin); - pr_debug("pixclk: %ldkHz\n", PICOS2KHZ(vmode->pixclock)); - - host->ld_intf_width = CTRL_GET_BUS_WIDTH(ctrl); - host->dotclk_delay = VDCTRL4_GET_DOTCLK_DLY(vdctrl4); - - fb_info->fix.line_length = vmode->xres * (bits_per_pixel >> 3); - - pa = readl(host->base + host->devdata->cur_buf); - fbsize = fb_info->fix.line_length * vmode->yres; - if (pa < fb_info->fix.smem_start) { - ret = -EINVAL; - goto err; - } - if (pa + fbsize > fb_info->fix.smem_start + fb_info->fix.smem_len) { - ret = -EINVAL; - goto err; - } - ofs = pa - fb_info->fix.smem_start; - if (ofs) { - memmove(fb_info->screen_base, fb_info->screen_base + ofs, fbsize); - writel(fb_info->fix.smem_start, host->base + host->devdata->next_buf); - } - - fb_info->fix.ypanstep = 1; - - clk_prepare_enable(host->clk); - host->enabled = 1; - -err: - if (ret) - mxsfb_disable_axi_clk(host); - - return ret; -} - -static int mxsfb_init_fbinfo_dt(struct fb_info *fb_info, - struct fb_videomode *vmode) -{ - struct mxsfb_info *host = fb_info->par; - struct fb_var_screeninfo *var = &fb_info->var; - struct device *dev = &host->pdev->dev; - struct device_node *np = host->pdev->dev.of_node; - struct device_node *display_np; - struct videomode vm; - u32 width; - int ret; - - display_np = of_parse_phandle(np, "display", 0); - if (!display_np) { - dev_err(dev, "failed to find display phandle\n"); - return -ENOENT; - } - - ret = of_property_read_u32(display_np, "bus-width", &width); - if (ret < 0) { - dev_err(dev, "failed to get property bus-width\n"); - goto put_display_node; - } - - switch (width) { - case 8: - host->ld_intf_width = STMLCDIF_8BIT; - break; - case 16: - host->ld_intf_width = STMLCDIF_16BIT; - break; - case 18: - host->ld_intf_width = STMLCDIF_18BIT; - break; - case 24: - host->ld_intf_width = STMLCDIF_24BIT; - break; - default: - dev_err(dev, "invalid bus-width value\n"); - ret = -EINVAL; - goto put_display_node; - } - - ret = of_property_read_u32(display_np, "bits-per-pixel", - &var->bits_per_pixel); - if (ret < 0) { - dev_err(dev, "failed to get property bits-per-pixel\n"); - goto put_display_node; - } - - ret = of_get_videomode(display_np, &vm, OF_USE_NATIVE_MODE); - if (ret) { - dev_err(dev, "failed to get videomode from DT\n"); - goto put_display_node; - } - - ret = fb_videomode_from_videomode(&vm, vmode); - if (ret < 0) - goto put_display_node; - - if (vm.flags & DISPLAY_FLAGS_DE_HIGH) - host->sync |= MXSFB_SYNC_DATA_ENABLE_HIGH_ACT; - - /* - * The PIXDATA flags of the display_flags enum are controller - * centric, e.g. NEGEDGE means drive data on negative edge. - * However, the drivers flag is display centric: Sample the - * data on negative (falling) edge. Therefore, check for the - * POSEDGE flag: - * drive on positive edge => sample on negative edge - */ - if (vm.flags & DISPLAY_FLAGS_PIXDATA_POSEDGE) - host->sync |= MXSFB_SYNC_DOTCLK_FALLING_ACT; - -put_display_node: - of_node_put(display_np); - return ret; -} - -static int mxsfb_init_fbinfo(struct fb_info *fb_info, - struct fb_videomode *vmode) -{ - int ret; - struct mxsfb_info *host = fb_info->par; - struct device *dev = &host->pdev->dev; - struct fb_var_screeninfo *var = &fb_info->var; - dma_addr_t fb_phys; - void *fb_virt; - unsigned fb_size; - - fb_info->fbops = &mxsfb_ops; - fb_info->flags = FBINFO_FLAG_DEFAULT | FBINFO_READS_FAST; - strlcpy(fb_info->fix.id, "mxs", sizeof(fb_info->fix.id)); - fb_info->fix.type = FB_TYPE_PACKED_PIXELS; - fb_info->fix.ypanstep = 1; - fb_info->fix.visual = FB_VISUAL_TRUECOLOR, - fb_info->fix.accel = FB_ACCEL_NONE; - - ret = mxsfb_init_fbinfo_dt(fb_info, vmode); - if (ret) - return ret; - - var->nonstd = 0; - var->activate = FB_ACTIVATE_NOW; - var->accel_flags = 0; - var->vmode = FB_VMODE_NONINTERLACED; - - /* Memory allocation for framebuffer */ - fb_size = SZ_2M; - fb_virt = dma_alloc_wc(dev, PAGE_ALIGN(fb_size), &fb_phys, GFP_KERNEL); - if (!fb_virt) - return -ENOMEM; - - fb_info->fix.smem_start = fb_phys; - fb_info->screen_base = fb_virt; - fb_info->screen_size = fb_info->fix.smem_len = fb_size; - - if (mxsfb_restore_mode(fb_info, vmode)) - memset(fb_virt, 0, fb_size); - - return 0; -} - -static void mxsfb_free_videomem(struct fb_info *fb_info) -{ - struct mxsfb_info *host = fb_info->par; - struct device *dev = &host->pdev->dev; - - dma_free_wc(dev, fb_info->screen_size, fb_info->screen_base, - fb_info->fix.smem_start); -} - -static const struct platform_device_id mxsfb_devtype[] = { - { - .name = "imx23-fb", - .driver_data = MXSFB_V3, - }, { - .name = "imx28-fb", - .driver_data = MXSFB_V4, - }, { - /* sentinel */ - } -}; -MODULE_DEVICE_TABLE(platform, mxsfb_devtype); - -static const struct of_device_id mxsfb_dt_ids[] = { - { .compatible = "fsl,imx23-lcdif", .data = &mxsfb_devtype[0], }, - { .compatible = "fsl,imx28-lcdif", .data = &mxsfb_devtype[1], }, - { /* sentinel */ } -}; -MODULE_DEVICE_TABLE(of, mxsfb_dt_ids); - -static int mxsfb_probe(struct platform_device *pdev) -{ - const struct of_device_id *of_id = - of_match_device(mxsfb_dt_ids, &pdev->dev); - struct resource *res; - struct mxsfb_info *host; - struct fb_info *fb_info; - struct fb_videomode *mode; - int ret; - - if (of_id) - pdev->id_entry = of_id->data; - - fb_info = framebuffer_alloc(sizeof(struct mxsfb_info), &pdev->dev); - if (!fb_info) { - dev_err(&pdev->dev, "Failed to allocate fbdev\n"); - return -ENOMEM; - } - - mode = devm_kzalloc(&pdev->dev, sizeof(struct fb_videomode), - GFP_KERNEL); - if (mode == NULL) - return -ENOMEM; - - host = fb_info->par; - - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - host->base = devm_ioremap_resource(&pdev->dev, res); - if (IS_ERR(host->base)) { - ret = PTR_ERR(host->base); - goto fb_release; - } - - host->pdev = pdev; - platform_set_drvdata(pdev, host); - - host->devdata = &mxsfb_devdata[pdev->id_entry->driver_data]; - - host->clk = devm_clk_get(&host->pdev->dev, NULL); - if (IS_ERR(host->clk)) { - ret = PTR_ERR(host->clk); - goto fb_release; - } - - host->clk_axi = devm_clk_get(&host->pdev->dev, "axi"); - if (IS_ERR(host->clk_axi)) - host->clk_axi = NULL; - - host->clk_disp_axi = devm_clk_get(&host->pdev->dev, "disp_axi"); - if (IS_ERR(host->clk_disp_axi)) - host->clk_disp_axi = NULL; - - host->reg_lcd = devm_regulator_get(&pdev->dev, "lcd"); - if (IS_ERR(host->reg_lcd)) - host->reg_lcd = NULL; - -#if defined(CONFIG_FB_PRE_INIT_FB) - host->pre_init = 1; -#endif - - fb_info->pseudo_palette = devm_kcalloc(&pdev->dev, 16, sizeof(u32), - GFP_KERNEL); - if (!fb_info->pseudo_palette) { - ret = -ENOMEM; - goto fb_release; - } - - ret = mxsfb_init_fbinfo(fb_info, mode); - if (ret != 0) - goto fb_release; - - fb_videomode_to_var(&fb_info->var, mode); - - /* init the color fields */ - mxsfb_check_var(&fb_info->var, fb_info); - - platform_set_drvdata(pdev, fb_info); - - ret = register_framebuffer(fb_info); - if (ret != 0) { - dev_err(&pdev->dev,"Failed to register framebuffer\n"); - goto fb_destroy; - } - - if (!host->enabled) { - mxsfb_enable_axi_clk(host); - writel(0, host->base + LCDC_CTRL); - mxsfb_disable_axi_clk(host); - mxsfb_set_par(fb_info); - mxsfb_enable_controller(fb_info); - } - - host->pre_init = 0; - dev_info(&pdev->dev, "initialized\n"); - - return 0; - -fb_destroy: - if (host->enabled) - clk_disable_unprepare(host->clk); -fb_release: - framebuffer_release(fb_info); - - return ret; -} - -static int mxsfb_remove(struct platform_device *pdev) -{ - struct fb_info *fb_info = platform_get_drvdata(pdev); - struct mxsfb_info *host = fb_info->par; - - if (host->enabled) - mxsfb_disable_controller(fb_info); - - unregister_framebuffer(fb_info); - mxsfb_free_videomem(fb_info); - - framebuffer_release(fb_info); - - return 0; -} - -static void mxsfb_shutdown(struct platform_device *pdev) -{ - struct fb_info *fb_info = platform_get_drvdata(pdev); - struct mxsfb_info *host = fb_info->par; - - mxsfb_enable_axi_clk(host); - - /* - * Force stop the LCD controller as keeping it running during reboot - * might interfere with the BootROM's boot mode pads sampling. - */ - writel(CTRL_RUN, host->base + LCDC_CTRL + REG_CLR); - - mxsfb_disable_axi_clk(host); -} - -static struct platform_driver mxsfb_driver = { - .probe = mxsfb_probe, - .remove = mxsfb_remove, - .shutdown = mxsfb_shutdown, - .id_table = mxsfb_devtype, - .driver = { - .name = DRIVER_NAME, - .of_match_table = mxsfb_dt_ids, - }, -}; - -module_platform_driver(mxsfb_driver); - -MODULE_DESCRIPTION("Freescale mxs framebuffer driver"); -MODULE_AUTHOR("Sascha Hauer, Pengutronix"); -MODULE_LICENSE("GPL"); |