diff options
Diffstat (limited to 'drivers/video/fbdev/omap/omapfb_main.c')
| -rw-r--r-- | drivers/video/fbdev/omap/omapfb_main.c | 1927 |
1 files changed, 1927 insertions, 0 deletions
diff --git a/drivers/video/fbdev/omap/omapfb_main.c b/drivers/video/fbdev/omap/omapfb_main.c new file mode 100644 index 000000000..3d090d2d9 --- /dev/null +++ b/drivers/video/fbdev/omap/omapfb_main.c @@ -0,0 +1,1927 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Framebuffer driver for TI OMAP boards + * + * Copyright (C) 2004 Nokia Corporation + * Author: Imre Deak <imre.deak@nokia.com> + * + * Acknowledgements: + * Alex McMains <aam@ridgerun.com> - Original driver + * Juha Yrjola <juha.yrjola@nokia.com> - Original driver and improvements + * Dirk Behme <dirk.behme@de.bosch.com> - changes for 2.6 kernel API + * Texas Instruments - H3 support + */ +#include <linux/platform_device.h> +#include <linux/mm.h> +#include <linux/slab.h> +#include <linux/uaccess.h> +#include <linux/module.h> + +#include <linux/omap-dma.h> + +#include <mach/hardware.h> + +#include "omapfb.h" +#include "lcdc.h" + +#define MODULE_NAME "omapfb" + +static unsigned int def_accel; +static unsigned long def_vram[OMAPFB_PLANE_NUM]; +static unsigned int def_vram_cnt; +static unsigned long def_vxres; +static unsigned long def_vyres; +static unsigned int def_rotate; +static unsigned int def_mirror; + +static bool manual_update = IS_BUILTIN(CONFIG_FB_OMAP_MANUAL_UPDATE); + +static struct platform_device *fbdev_pdev; +static struct lcd_panel *fbdev_panel; +static struct omapfb_device *omapfb_dev; + +struct caps_table_struct { + unsigned long flag; + const char *name; +}; + +static const struct caps_table_struct ctrl_caps[] = { + { OMAPFB_CAPS_MANUAL_UPDATE, "manual update" }, + { OMAPFB_CAPS_TEARSYNC, "tearing synchronization" }, + { OMAPFB_CAPS_PLANE_RELOCATE_MEM, "relocate plane memory" }, + { OMAPFB_CAPS_PLANE_SCALE, "scale plane" }, + { OMAPFB_CAPS_WINDOW_PIXEL_DOUBLE, "pixel double window" }, + { OMAPFB_CAPS_WINDOW_SCALE, "scale window" }, + { OMAPFB_CAPS_WINDOW_OVERLAY, "overlay window" }, + { OMAPFB_CAPS_WINDOW_ROTATE, "rotate window" }, + { OMAPFB_CAPS_SET_BACKLIGHT, "backlight setting" }, +}; + +static const struct caps_table_struct color_caps[] = { + { 1 << OMAPFB_COLOR_RGB565, "RGB565", }, + { 1 << OMAPFB_COLOR_YUV422, "YUV422", }, + { 1 << OMAPFB_COLOR_YUV420, "YUV420", }, + { 1 << OMAPFB_COLOR_CLUT_8BPP, "CLUT8", }, + { 1 << OMAPFB_COLOR_CLUT_4BPP, "CLUT4", }, + { 1 << OMAPFB_COLOR_CLUT_2BPP, "CLUT2", }, + { 1 << OMAPFB_COLOR_CLUT_1BPP, "CLUT1", }, + { 1 << OMAPFB_COLOR_RGB444, "RGB444", }, + { 1 << OMAPFB_COLOR_YUY422, "YUY422", }, +}; + +static void omapdss_release(struct device *dev) +{ +} + +/* dummy device for clocks */ +static struct platform_device omapdss_device = { + .name = "omapdss_dss", + .id = -1, + .dev = { + .release = omapdss_release, + }, +}; + +/* + * --------------------------------------------------------------------------- + * LCD panel + * --------------------------------------------------------------------------- + */ +extern struct lcd_ctrl hwa742_ctrl; + +static const struct lcd_ctrl *ctrls[] = { + &omap1_int_ctrl, + +#ifdef CONFIG_FB_OMAP_LCDC_HWA742 + &hwa742_ctrl, +#endif +}; + +#ifdef CONFIG_FB_OMAP_LCDC_EXTERNAL +extern struct lcd_ctrl_extif omap1_ext_if; +#endif + +static void omapfb_rqueue_lock(struct omapfb_device *fbdev) +{ + mutex_lock(&fbdev->rqueue_mutex); +} + +static void omapfb_rqueue_unlock(struct omapfb_device *fbdev) +{ + mutex_unlock(&fbdev->rqueue_mutex); +} + +/* + * --------------------------------------------------------------------------- + * LCD controller and LCD DMA + * --------------------------------------------------------------------------- + */ +/* + * Allocate resources needed for LCD controller and LCD DMA operations. Video + * memory is allocated from system memory according to the virtual display + * size, except if a bigger memory size is specified explicitly as a kernel + * parameter. + */ +static int ctrl_init(struct omapfb_device *fbdev) +{ + int r; + int i; + + /* kernel/module vram parameters override boot tags/board config */ + if (def_vram_cnt) { + for (i = 0; i < def_vram_cnt; i++) + fbdev->mem_desc.region[i].size = + PAGE_ALIGN(def_vram[i]); + fbdev->mem_desc.region_cnt = i; + } + + if (!fbdev->mem_desc.region_cnt) { + struct lcd_panel *panel = fbdev->panel; + int def_size; + int bpp = panel->bpp; + + /* 12 bpp is packed in 16 bits */ + if (bpp == 12) + bpp = 16; + def_size = def_vxres * def_vyres * bpp / 8; + fbdev->mem_desc.region_cnt = 1; + fbdev->mem_desc.region[0].size = PAGE_ALIGN(def_size); + } + r = fbdev->ctrl->init(fbdev, 0, &fbdev->mem_desc); + if (r < 0) { + dev_err(fbdev->dev, "controller initialization failed (%d)\n", + r); + return r; + } + +#ifdef DEBUG + for (i = 0; i < fbdev->mem_desc.region_cnt; i++) { + dev_dbg(fbdev->dev, "region%d phys %08x virt %p size=%lu\n", + i, + fbdev->mem_desc.region[i].paddr, + fbdev->mem_desc.region[i].vaddr, + fbdev->mem_desc.region[i].size); + } +#endif + return 0; +} + +static void ctrl_cleanup(struct omapfb_device *fbdev) +{ + fbdev->ctrl->cleanup(); +} + +/* Must be called with fbdev->rqueue_mutex held. */ +static int ctrl_change_mode(struct fb_info *fbi) +{ + int r; + unsigned long offset; + struct omapfb_plane_struct *plane = fbi->par; + struct omapfb_device *fbdev = plane->fbdev; + struct fb_var_screeninfo *var = &fbi->var; + + offset = var->yoffset * fbi->fix.line_length + + var->xoffset * var->bits_per_pixel / 8; + + if (fbdev->ctrl->sync) + fbdev->ctrl->sync(); + r = fbdev->ctrl->setup_plane(plane->idx, plane->info.channel_out, + offset, var->xres_virtual, + plane->info.pos_x, plane->info.pos_y, + var->xres, var->yres, plane->color_mode); + if (r < 0) + return r; + + if (fbdev->ctrl->set_rotate != NULL) { + r = fbdev->ctrl->set_rotate(var->rotate); + if (r < 0) + return r; + } + + if (fbdev->ctrl->set_scale != NULL) + r = fbdev->ctrl->set_scale(plane->idx, + var->xres, var->yres, + plane->info.out_width, + plane->info.out_height); + + return r; +} + +/* + * --------------------------------------------------------------------------- + * fbdev framework callbacks and the ioctl interface + * --------------------------------------------------------------------------- + */ +/* Called each time the omapfb device is opened */ +static int omapfb_open(struct fb_info *info, int user) +{ + return 0; +} + +static void omapfb_sync(struct fb_info *info); + +/* Called when the omapfb device is closed. We make sure that any pending + * gfx DMA operations are ended, before we return. */ +static int omapfb_release(struct fb_info *info, int user) +{ + omapfb_sync(info); + return 0; +} + +/* Store a single color palette entry into a pseudo palette or the hardware + * palette if one is available. For now we support only 16bpp and thus store + * the entry only to the pseudo palette. + */ +static int _setcolreg(struct fb_info *info, u_int regno, u_int red, u_int green, + u_int blue, u_int transp, int update_hw_pal) +{ + struct omapfb_plane_struct *plane = info->par; + struct omapfb_device *fbdev = plane->fbdev; + struct fb_var_screeninfo *var = &info->var; + int r = 0; + + switch (plane->color_mode) { + case OMAPFB_COLOR_YUV422: + case OMAPFB_COLOR_YUV420: + case OMAPFB_COLOR_YUY422: + r = -EINVAL; + break; + case OMAPFB_COLOR_CLUT_8BPP: + case OMAPFB_COLOR_CLUT_4BPP: + case OMAPFB_COLOR_CLUT_2BPP: + case OMAPFB_COLOR_CLUT_1BPP: + if (fbdev->ctrl->setcolreg) + r = fbdev->ctrl->setcolreg(regno, red, green, blue, + transp, update_hw_pal); + fallthrough; + case OMAPFB_COLOR_RGB565: + case OMAPFB_COLOR_RGB444: + if (r != 0) + break; + + if (regno < 16) { + u16 pal; + pal = ((red >> (16 - var->red.length)) << + var->red.offset) | + ((green >> (16 - var->green.length)) << + var->green.offset) | + (blue >> (16 - var->blue.length)); + ((u32 *)(info->pseudo_palette))[regno] = pal; + } + break; + default: + BUG(); + } + return r; +} + +static int omapfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue, + u_int transp, struct fb_info *info) +{ + return _setcolreg(info, regno, red, green, blue, transp, 1); +} + +static int omapfb_setcmap(struct fb_cmap *cmap, struct fb_info *info) +{ + int count, index, r; + u16 *red, *green, *blue, *transp; + u16 trans = 0xffff; + + red = cmap->red; + green = cmap->green; + blue = cmap->blue; + transp = cmap->transp; + index = cmap->start; + + for (count = 0; count < cmap->len; count++) { + if (transp) + trans = *transp++; + r = _setcolreg(info, index++, *red++, *green++, *blue++, trans, + count == cmap->len - 1); + if (r != 0) + return r; + } + + return 0; +} + +static int omapfb_update_full_screen(struct fb_info *fbi); + +static int omapfb_blank(int blank, struct fb_info *fbi) +{ + struct omapfb_plane_struct *plane = fbi->par; + struct omapfb_device *fbdev = plane->fbdev; + int do_update = 0; + int r = 0; + + omapfb_rqueue_lock(fbdev); + switch (blank) { + case FB_BLANK_UNBLANK: + if (fbdev->state == OMAPFB_SUSPENDED) { + if (fbdev->ctrl->resume) + fbdev->ctrl->resume(); + if (fbdev->panel->enable) + fbdev->panel->enable(fbdev->panel); + fbdev->state = OMAPFB_ACTIVE; + if (fbdev->ctrl->get_update_mode() == + OMAPFB_MANUAL_UPDATE) + do_update = 1; + } + break; + case FB_BLANK_POWERDOWN: + if (fbdev->state == OMAPFB_ACTIVE) { + if (fbdev->panel->disable) + fbdev->panel->disable(fbdev->panel); + if (fbdev->ctrl->suspend) + fbdev->ctrl->suspend(); + fbdev->state = OMAPFB_SUSPENDED; + } + break; + default: + r = -EINVAL; + } + omapfb_rqueue_unlock(fbdev); + + if (r == 0 && do_update) + r = omapfb_update_full_screen(fbi); + + return r; +} + +static void omapfb_sync(struct fb_info *fbi) +{ + struct omapfb_plane_struct *plane = fbi->par; + struct omapfb_device *fbdev = plane->fbdev; + + omapfb_rqueue_lock(fbdev); + if (fbdev->ctrl->sync) + fbdev->ctrl->sync(); + omapfb_rqueue_unlock(fbdev); +} + +/* + * Set fb_info.fix fields and also updates fbdev. + * When calling this fb_info.var must be set up already. + */ +static void set_fb_fix(struct fb_info *fbi, int from_init) +{ + struct fb_fix_screeninfo *fix = &fbi->fix; + struct fb_var_screeninfo *var = &fbi->var; + struct omapfb_plane_struct *plane = fbi->par; + struct omapfb_mem_region *rg; + int bpp; + + rg = &plane->fbdev->mem_desc.region[plane->idx]; + fbi->screen_base = rg->vaddr; + + if (!from_init) { + mutex_lock(&fbi->mm_lock); + fix->smem_start = rg->paddr; + fix->smem_len = rg->size; + mutex_unlock(&fbi->mm_lock); + } else { + fix->smem_start = rg->paddr; + fix->smem_len = rg->size; + } + + fix->type = FB_TYPE_PACKED_PIXELS; + bpp = var->bits_per_pixel; + if (var->nonstd) + fix->visual = FB_VISUAL_PSEUDOCOLOR; + else switch (var->bits_per_pixel) { + case 16: + case 12: + fix->visual = FB_VISUAL_TRUECOLOR; + /* 12bpp is stored in 16 bits */ + bpp = 16; + break; + case 1: + case 2: + case 4: + case 8: + fix->visual = FB_VISUAL_PSEUDOCOLOR; + break; + } + fix->accel = FB_ACCEL_OMAP1610; + fix->line_length = var->xres_virtual * bpp / 8; +} + +static int set_color_mode(struct omapfb_plane_struct *plane, + struct fb_var_screeninfo *var) +{ + switch (var->nonstd) { + case 0: + break; + case OMAPFB_COLOR_YUV422: + var->bits_per_pixel = 16; + plane->color_mode = var->nonstd; + return 0; + case OMAPFB_COLOR_YUV420: + var->bits_per_pixel = 12; + plane->color_mode = var->nonstd; + return 0; + case OMAPFB_COLOR_YUY422: + var->bits_per_pixel = 16; + plane->color_mode = var->nonstd; + return 0; + default: + return -EINVAL; + } + + switch (var->bits_per_pixel) { + case 1: + plane->color_mode = OMAPFB_COLOR_CLUT_1BPP; + return 0; + case 2: + plane->color_mode = OMAPFB_COLOR_CLUT_2BPP; + return 0; + case 4: + plane->color_mode = OMAPFB_COLOR_CLUT_4BPP; + return 0; + case 8: + plane->color_mode = OMAPFB_COLOR_CLUT_8BPP; + return 0; + case 12: + var->bits_per_pixel = 16; + fallthrough; + case 16: + if (plane->fbdev->panel->bpp == 12) + plane->color_mode = OMAPFB_COLOR_RGB444; + else + plane->color_mode = OMAPFB_COLOR_RGB565; + return 0; + default: + return -EINVAL; + } +} + +/* + * Check the values in var against our capabilities and in case of out of + * bound values try to adjust them. + */ +static int set_fb_var(struct fb_info *fbi, + struct fb_var_screeninfo *var) +{ + int bpp; + unsigned long max_frame_size; + unsigned long line_size; + int xres_min, xres_max; + int yres_min, yres_max; + struct omapfb_plane_struct *plane = fbi->par; + struct omapfb_device *fbdev = plane->fbdev; + struct lcd_panel *panel = fbdev->panel; + + if (set_color_mode(plane, var) < 0) + return -EINVAL; + + bpp = var->bits_per_pixel; + if (plane->color_mode == OMAPFB_COLOR_RGB444) + bpp = 16; + + switch (var->rotate) { + case 0: + case 180: + xres_min = OMAPFB_PLANE_XRES_MIN; + xres_max = panel->x_res; + yres_min = OMAPFB_PLANE_YRES_MIN; + yres_max = panel->y_res; + if (cpu_is_omap15xx()) { + var->xres = panel->x_res; + var->yres = panel->y_res; + } + break; + case 90: + case 270: + xres_min = OMAPFB_PLANE_YRES_MIN; + xres_max = panel->y_res; + yres_min = OMAPFB_PLANE_XRES_MIN; + yres_max = panel->x_res; + if (cpu_is_omap15xx()) { + var->xres = panel->y_res; + var->yres = panel->x_res; + } + break; + default: + return -EINVAL; + } + + if (var->xres < xres_min) + var->xres = xres_min; + if (var->yres < yres_min) + var->yres = yres_min; + if (var->xres > xres_max) + var->xres = xres_max; + if (var->yres > yres_max) + var->yres = yres_max; + + if (var->xres_virtual < var->xres) + var->xres_virtual = var->xres; + if (var->yres_virtual < var->yres) + var->yres_virtual = var->yres; + max_frame_size = fbdev->mem_desc.region[plane->idx].size; + line_size = var->xres_virtual * bpp / 8; + if (line_size * var->yres_virtual > max_frame_size) { + /* Try to keep yres_virtual first */ + line_size = max_frame_size / var->yres_virtual; + var->xres_virtual = line_size * 8 / bpp; + if (var->xres_virtual < var->xres) { + /* Still doesn't fit. Shrink yres_virtual too */ + var->xres_virtual = var->xres; + line_size = var->xres * bpp / 8; + var->yres_virtual = max_frame_size / line_size; + } + /* Recheck this, as the virtual size changed. */ + if (var->xres_virtual < var->xres) + var->xres = var->xres_virtual; + if (var->yres_virtual < var->yres) + var->yres = var->yres_virtual; + if (var->xres < xres_min || var->yres < yres_min) + return -EINVAL; + } + if (var->xres + var->xoffset > var->xres_virtual) + var->xoffset = var->xres_virtual - var->xres; + if (var->yres + var->yoffset > var->yres_virtual) + var->yoffset = var->yres_virtual - var->yres; + + if (plane->color_mode == OMAPFB_COLOR_RGB444) { + var->red.offset = 8; var->red.length = 4; + var->red.msb_right = 0; + var->green.offset = 4; var->green.length = 4; + var->green.msb_right = 0; + var->blue.offset = 0; var->blue.length = 4; + var->blue.msb_right = 0; + } else { + var->red.offset = 11; var->red.length = 5; + var->red.msb_right = 0; + var->green.offset = 5; var->green.length = 6; + var->green.msb_right = 0; + var->blue.offset = 0; var->blue.length = 5; + var->blue.msb_right = 0; + } + + var->height = -1; + var->width = -1; + var->grayscale = 0; + + /* pixclock in ps, the rest in pixclock */ + var->pixclock = 10000000 / (panel->pixel_clock / 100); + var->left_margin = panel->hfp; + var->right_margin = panel->hbp; + var->upper_margin = panel->vfp; + var->lower_margin = panel->vbp; + var->hsync_len = panel->hsw; + var->vsync_len = panel->vsw; + + /* TODO: get these from panel->config */ + var->vmode = FB_VMODE_NONINTERLACED; + var->sync = 0; + + return 0; +} + + +/* + * Set new x,y offsets in the virtual display for the visible area and switch + * to the new mode. + */ +static int omapfb_pan_display(struct fb_var_screeninfo *var, + struct fb_info *fbi) +{ + struct omapfb_plane_struct *plane = fbi->par; + struct omapfb_device *fbdev = plane->fbdev; + int r = 0; + + omapfb_rqueue_lock(fbdev); + if (var->xoffset != fbi->var.xoffset || + var->yoffset != fbi->var.yoffset) { + struct fb_var_screeninfo *new_var = &fbdev->new_var; + + memcpy(new_var, &fbi->var, sizeof(*new_var)); + new_var->xoffset = var->xoffset; + new_var->yoffset = var->yoffset; + if (set_fb_var(fbi, new_var)) + r = -EINVAL; + else { + memcpy(&fbi->var, new_var, sizeof(*new_var)); + ctrl_change_mode(fbi); + } + } + omapfb_rqueue_unlock(fbdev); + + return r; +} + +/* Set mirror to vertical axis and switch to the new mode. */ +static int omapfb_mirror(struct fb_info *fbi, int mirror) +{ + struct omapfb_plane_struct *plane = fbi->par; + struct omapfb_device *fbdev = plane->fbdev; + int r = 0; + + omapfb_rqueue_lock(fbdev); + mirror = mirror ? 1 : 0; + if (cpu_is_omap15xx()) + r = -EINVAL; + else if (mirror != plane->info.mirror) { + plane->info.mirror = mirror; + r = ctrl_change_mode(fbi); + } + omapfb_rqueue_unlock(fbdev); + + return r; +} + +/* + * Check values in var, try to adjust them in case of out of bound values if + * possible, or return error. + */ +static int omapfb_check_var(struct fb_var_screeninfo *var, struct fb_info *fbi) +{ + struct omapfb_plane_struct *plane = fbi->par; + struct omapfb_device *fbdev = plane->fbdev; + int r; + + omapfb_rqueue_lock(fbdev); + if (fbdev->ctrl->sync != NULL) + fbdev->ctrl->sync(); + r = set_fb_var(fbi, var); + omapfb_rqueue_unlock(fbdev); + + return r; +} + +/* + * Switch to a new mode. The parameters for it has been check already by + * omapfb_check_var. + */ +static int omapfb_set_par(struct fb_info *fbi) +{ + struct omapfb_plane_struct *plane = fbi->par; + struct omapfb_device *fbdev = plane->fbdev; + int r = 0; + + omapfb_rqueue_lock(fbdev); + set_fb_fix(fbi, 0); + r = ctrl_change_mode(fbi); + omapfb_rqueue_unlock(fbdev); + + return r; +} + +int omapfb_update_window_async(struct fb_info *fbi, + struct omapfb_update_window *win, + void (*callback)(void *), + void *callback_data) +{ + int xres, yres; + struct omapfb_plane_struct *plane = fbi->par; + struct omapfb_device *fbdev = plane->fbdev; + struct fb_var_screeninfo *var = &fbi->var; + + switch (var->rotate) { + case 0: + case 180: + xres = fbdev->panel->x_res; + yres = fbdev->panel->y_res; + break; + case 90: + case 270: + xres = fbdev->panel->y_res; + yres = fbdev->panel->x_res; + break; + default: + return -EINVAL; + } + + if (win->x >= xres || win->y >= yres || + win->out_x > xres || win->out_y > yres) + return -EINVAL; + + if (!fbdev->ctrl->update_window || + fbdev->ctrl->get_update_mode() != OMAPFB_MANUAL_UPDATE) + return -ENODEV; + + if (win->x + win->width > xres) + win->width = xres - win->x; + if (win->y + win->height > yres) + win->height = yres - win->y; + if (win->out_x + win->out_width > xres) + win->out_width = xres - win->out_x; + if (win->out_y + win->out_height > yres) + win->out_height = yres - win->out_y; + if (!win->width || !win->height || !win->out_width || !win->out_height) + return 0; + + return fbdev->ctrl->update_window(fbi, win, callback, callback_data); +} +EXPORT_SYMBOL(omapfb_update_window_async); + +static int omapfb_update_win(struct fb_info *fbi, + struct omapfb_update_window *win) +{ + struct omapfb_plane_struct *plane = fbi->par; + int ret; + + omapfb_rqueue_lock(plane->fbdev); + ret = omapfb_update_window_async(fbi, win, NULL, NULL); + omapfb_rqueue_unlock(plane->fbdev); + + return ret; +} + +static int omapfb_update_full_screen(struct fb_info *fbi) +{ + struct omapfb_plane_struct *plane = fbi->par; + struct omapfb_device *fbdev = plane->fbdev; + struct omapfb_update_window win; + int r; + + if (!fbdev->ctrl->update_window || + fbdev->ctrl->get_update_mode() != OMAPFB_MANUAL_UPDATE) + return -ENODEV; + + win.x = 0; + win.y = 0; + win.width = fbi->var.xres; + win.height = fbi->var.yres; + win.out_x = 0; + win.out_y = 0; + win.out_width = fbi->var.xres; + win.out_height = fbi->var.yres; + win.format = 0; + + omapfb_rqueue_lock(fbdev); + r = fbdev->ctrl->update_window(fbi, &win, NULL, NULL); + omapfb_rqueue_unlock(fbdev); + + return r; +} + +static int omapfb_setup_plane(struct fb_info *fbi, struct omapfb_plane_info *pi) +{ + struct omapfb_plane_struct *plane = fbi->par; + struct omapfb_device *fbdev = plane->fbdev; + struct lcd_panel *panel = fbdev->panel; + struct omapfb_plane_info old_info; + int r = 0; + + if (pi->pos_x + pi->out_width > panel->x_res || + pi->pos_y + pi->out_height > panel->y_res) + return -EINVAL; + + omapfb_rqueue_lock(fbdev); + if (pi->enabled && !fbdev->mem_desc.region[plane->idx].size) { + /* + * This plane's memory was freed, can't enable it + * until it's reallocated. + */ + r = -EINVAL; + goto out; + } + old_info = plane->info; + plane->info = *pi; + if (pi->enabled) { + r = ctrl_change_mode(fbi); + if (r < 0) { + plane->info = old_info; + goto out; + } + } + r = fbdev->ctrl->enable_plane(plane->idx, pi->enabled); + if (r < 0) { + plane->info = old_info; + goto out; + } +out: + omapfb_rqueue_unlock(fbdev); + return r; +} + +static int omapfb_query_plane(struct fb_info *fbi, struct omapfb_plane_info *pi) +{ + struct omapfb_plane_struct *plane = fbi->par; + + *pi = plane->info; + return 0; +} + +static int omapfb_setup_mem(struct fb_info *fbi, struct omapfb_mem_info *mi) +{ + struct omapfb_plane_struct *plane = fbi->par; + struct omapfb_device *fbdev = plane->fbdev; + struct omapfb_mem_region *rg = &fbdev->mem_desc.region[plane->idx]; + size_t size; + int r = 0; + + if (fbdev->ctrl->setup_mem == NULL) + return -ENODEV; + if (mi->type != OMAPFB_MEMTYPE_SDRAM) + return -EINVAL; + + size = PAGE_ALIGN(mi->size); + omapfb_rqueue_lock(fbdev); + if (plane->info.enabled) { + r = -EBUSY; + goto out; + } + if (rg->size != size || rg->type != mi->type) { + struct fb_var_screeninfo *new_var = &fbdev->new_var; + unsigned long old_size = rg->size; + u8 old_type = rg->type; + unsigned long paddr; + + rg->size = size; + rg->type = mi->type; + /* + * size == 0 is a special case, for which we + * don't check / adjust the screen parameters. + * This isn't a problem since the plane can't + * be reenabled unless its size is > 0. + */ + if (old_size != size && size) { + if (size) { + memcpy(new_var, &fbi->var, sizeof(*new_var)); + r = set_fb_var(fbi, new_var); + if (r < 0) + goto out; + } + } + + if (fbdev->ctrl->sync) + fbdev->ctrl->sync(); + r = fbdev->ctrl->setup_mem(plane->idx, size, mi->type, &paddr); + if (r < 0) { + /* Revert changes. */ + rg->size = old_size; + rg->type = old_type; + goto out; + } + rg->paddr = paddr; + + if (old_size != size) { + if (size) { + memcpy(&fbi->var, new_var, sizeof(fbi->var)); + set_fb_fix(fbi, 0); + } else { + /* + * Set these explicitly to indicate that the + * plane memory is dealloce'd, the other + * screen parameters in var / fix are invalid. + */ + mutex_lock(&fbi->mm_lock); + fbi->fix.smem_start = 0; + fbi->fix.smem_len = 0; + mutex_unlock(&fbi->mm_lock); + } + } + } +out: + omapfb_rqueue_unlock(fbdev); + + return r; +} + +static int omapfb_query_mem(struct fb_info *fbi, struct omapfb_mem_info *mi) +{ + struct omapfb_plane_struct *plane = fbi->par; + struct omapfb_device *fbdev = plane->fbdev; + struct omapfb_mem_region *rg; + + rg = &fbdev->mem_desc.region[plane->idx]; + memset(mi, 0, sizeof(*mi)); + mi->size = rg->size; + mi->type = rg->type; + + return 0; +} + +static int omapfb_set_color_key(struct omapfb_device *fbdev, + struct omapfb_color_key *ck) +{ + int r; + + if (!fbdev->ctrl->set_color_key) + return -ENODEV; + + omapfb_rqueue_lock(fbdev); + r = fbdev->ctrl->set_color_key(ck); + omapfb_rqueue_unlock(fbdev); + + return r; +} + +static int omapfb_get_color_key(struct omapfb_device *fbdev, + struct omapfb_color_key *ck) +{ + int r; + + if (!fbdev->ctrl->get_color_key) + return -ENODEV; + + omapfb_rqueue_lock(fbdev); + r = fbdev->ctrl->get_color_key(ck); + omapfb_rqueue_unlock(fbdev); + + return r; +} + +static struct blocking_notifier_head omapfb_client_list[OMAPFB_PLANE_NUM]; +static int notifier_inited; + +static void omapfb_init_notifier(void) +{ + int i; + + for (i = 0; i < OMAPFB_PLANE_NUM; i++) + BLOCKING_INIT_NOTIFIER_HEAD(&omapfb_client_list[i]); +} + +int omapfb_register_client(struct omapfb_notifier_block *omapfb_nb, + omapfb_notifier_callback_t callback, + void *callback_data) +{ + int r; + + if ((unsigned)omapfb_nb->plane_idx >= OMAPFB_PLANE_NUM) + return -EINVAL; + + if (!notifier_inited) { + omapfb_init_notifier(); + notifier_inited = 1; + } + + omapfb_nb->nb.notifier_call = (int (*)(struct notifier_block *, + unsigned long, void *))callback; + omapfb_nb->data = callback_data; + r = blocking_notifier_chain_register( + &omapfb_client_list[omapfb_nb->plane_idx], + &omapfb_nb->nb); + if (r) + return r; + if (omapfb_dev != NULL && + omapfb_dev->ctrl && omapfb_dev->ctrl->bind_client) { + omapfb_dev->ctrl->bind_client(omapfb_nb); + } + + return 0; +} +EXPORT_SYMBOL(omapfb_register_client); + +int omapfb_unregister_client(struct omapfb_notifier_block *omapfb_nb) +{ + return blocking_notifier_chain_unregister( + &omapfb_client_list[omapfb_nb->plane_idx], &omapfb_nb->nb); +} +EXPORT_SYMBOL(omapfb_unregister_client); + +void omapfb_notify_clients(struct omapfb_device *fbdev, unsigned long event) +{ + int i; + + if (!notifier_inited) + /* no client registered yet */ + return; + + for (i = 0; i < OMAPFB_PLANE_NUM; i++) + blocking_notifier_call_chain(&omapfb_client_list[i], event, + fbdev->fb_info[i]); +} +EXPORT_SYMBOL(omapfb_notify_clients); + +static int omapfb_set_update_mode(struct omapfb_device *fbdev, + enum omapfb_update_mode mode) +{ + int r; + + omapfb_rqueue_lock(fbdev); + r = fbdev->ctrl->set_update_mode(mode); + omapfb_rqueue_unlock(fbdev); + + return r; +} + +static enum omapfb_update_mode omapfb_get_update_mode(struct omapfb_device *fbdev) +{ + int r; + + omapfb_rqueue_lock(fbdev); + r = fbdev->ctrl->get_update_mode(); + omapfb_rqueue_unlock(fbdev); + + return r; +} + +static void omapfb_get_caps(struct omapfb_device *fbdev, int plane, + struct omapfb_caps *caps) +{ + memset(caps, 0, sizeof(*caps)); + fbdev->ctrl->get_caps(plane, caps); + if (fbdev->panel->get_caps) + caps->ctrl |= fbdev->panel->get_caps(fbdev->panel); +} + +/* For lcd testing */ +void omapfb_write_first_pixel(struct omapfb_device *fbdev, u16 pixval) +{ + omapfb_rqueue_lock(fbdev); + *(u16 *)fbdev->mem_desc.region[0].vaddr = pixval; + if (fbdev->ctrl->get_update_mode() == OMAPFB_MANUAL_UPDATE) { + struct omapfb_update_window win; + + memset(&win, 0, sizeof(win)); + win.width = 2; + win.height = 2; + win.out_width = 2; + win.out_height = 2; + fbdev->ctrl->update_window(fbdev->fb_info[0], &win, NULL, NULL); + } + omapfb_rqueue_unlock(fbdev); +} +EXPORT_SYMBOL(omapfb_write_first_pixel); + +/* + * Ioctl interface. Part of the kernel mode frame buffer API is duplicated + * here to be accessible by user mode code. + */ +static int omapfb_ioctl(struct fb_info *fbi, unsigned int cmd, + unsigned long arg) +{ + struct omapfb_plane_struct *plane = fbi->par; + struct omapfb_device *fbdev = plane->fbdev; + const struct fb_ops *ops = fbi->fbops; + union { + struct omapfb_update_window update_window; + struct omapfb_plane_info plane_info; + struct omapfb_mem_info mem_info; + struct omapfb_color_key color_key; + enum omapfb_update_mode update_mode; + struct omapfb_caps caps; + unsigned int mirror; + int plane_out; + int enable_plane; + } p; + int r = 0; + + BUG_ON(!ops); + switch (cmd) { + case OMAPFB_MIRROR: + if (get_user(p.mirror, (int __user *)arg)) + r = -EFAULT; + else + omapfb_mirror(fbi, p.mirror); + break; + case OMAPFB_SYNC_GFX: + omapfb_sync(fbi); + break; + case OMAPFB_VSYNC: + break; + case OMAPFB_SET_UPDATE_MODE: + if (get_user(p.update_mode, (int __user *)arg)) + r = -EFAULT; + else + r = omapfb_set_update_mode(fbdev, p.update_mode); + break; + case OMAPFB_GET_UPDATE_MODE: + p.update_mode = omapfb_get_update_mode(fbdev); + if (put_user(p.update_mode, + (enum omapfb_update_mode __user *)arg)) + r = -EFAULT; + break; + case OMAPFB_UPDATE_WINDOW_OLD: + if (copy_from_user(&p.update_window, (void __user *)arg, + sizeof(struct omapfb_update_window_old))) + r = -EFAULT; + else { + struct omapfb_update_window *u = &p.update_window; + u->out_x = u->x; + u->out_y = u->y; + u->out_width = u->width; + u->out_height = u->height; + memset(u->reserved, 0, sizeof(u->reserved)); + r = omapfb_update_win(fbi, u); + } + break; + case OMAPFB_UPDATE_WINDOW: + if (copy_from_user(&p.update_window, (void __user *)arg, + sizeof(p.update_window))) + r = -EFAULT; + else + r = omapfb_update_win(fbi, &p.update_window); + break; + case OMAPFB_SETUP_PLANE: + if (copy_from_user(&p.plane_info, (void __user *)arg, + sizeof(p.plane_info))) + r = -EFAULT; + else + r = omapfb_setup_plane(fbi, &p.plane_info); + break; + case OMAPFB_QUERY_PLANE: + if ((r = omapfb_query_plane(fbi, &p.plane_info)) < 0) + break; + if (copy_to_user((void __user *)arg, &p.plane_info, + sizeof(p.plane_info))) + r = -EFAULT; + break; + case OMAPFB_SETUP_MEM: + if (copy_from_user(&p.mem_info, (void __user *)arg, + sizeof(p.mem_info))) + r = -EFAULT; + else + r = omapfb_setup_mem(fbi, &p.mem_info); + break; + case OMAPFB_QUERY_MEM: + if ((r = omapfb_query_mem(fbi, &p.mem_info)) < 0) + break; + if (copy_to_user((void __user *)arg, &p.mem_info, + sizeof(p.mem_info))) + r = -EFAULT; + break; + case OMAPFB_SET_COLOR_KEY: + if (copy_from_user(&p.color_key, (void __user *)arg, + sizeof(p.color_key))) + r = -EFAULT; + else + r = omapfb_set_color_key(fbdev, &p.color_key); + break; + case OMAPFB_GET_COLOR_KEY: + if ((r = omapfb_get_color_key(fbdev, &p.color_key)) < 0) + break; + if (copy_to_user((void __user *)arg, &p.color_key, + sizeof(p.color_key))) + r = -EFAULT; + break; + case OMAPFB_GET_CAPS: + omapfb_get_caps(fbdev, plane->idx, &p.caps); + if (copy_to_user((void __user *)arg, &p.caps, sizeof(p.caps))) + r = -EFAULT; + break; + case OMAPFB_LCD_TEST: + { + int test_num; + + if (get_user(test_num, (int __user *)arg)) { + r = -EFAULT; + break; + } + if (!fbdev->panel->run_test) { + r = -EINVAL; + break; + } + r = fbdev->panel->run_test(fbdev->panel, test_num); + break; + } + case OMAPFB_CTRL_TEST: + { + int test_num; + + if (get_user(test_num, (int __user *)arg)) { + r = -EFAULT; + break; + } + if (!fbdev->ctrl->run_test) { + r = -EINVAL; + break; + } + r = fbdev->ctrl->run_test(test_num); + break; + } + default: + r = -EINVAL; + } + + return r; +} + +static int omapfb_mmap(struct fb_info *info, struct vm_area_struct *vma) +{ + struct omapfb_plane_struct *plane = info->par; + struct omapfb_device *fbdev = plane->fbdev; + int r; + + omapfb_rqueue_lock(fbdev); + r = fbdev->ctrl->mmap(info, vma); + omapfb_rqueue_unlock(fbdev); + + return r; +} + +/* + * Callback table for the frame buffer framework. Some of these pointers + * will be changed according to the current setting of fb_info->accel_flags. + */ +static struct fb_ops omapfb_ops = { + .owner = THIS_MODULE, + .fb_open = omapfb_open, + .fb_release = omapfb_release, + .fb_setcolreg = omapfb_setcolreg, + .fb_setcmap = omapfb_setcmap, + .fb_fillrect = cfb_fillrect, + .fb_copyarea = cfb_copyarea, + .fb_imageblit = cfb_imageblit, + .fb_blank = omapfb_blank, + .fb_ioctl = omapfb_ioctl, + .fb_check_var = omapfb_check_var, + .fb_set_par = omapfb_set_par, + .fb_pan_display = omapfb_pan_display, +}; + +/* + * --------------------------------------------------------------------------- + * Sysfs interface + * --------------------------------------------------------------------------- + */ +/* omapfbX sysfs entries */ +static ssize_t omapfb_show_caps_num(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct omapfb_device *fbdev = dev_get_drvdata(dev); + int plane; + size_t size; + struct omapfb_caps caps; + + plane = 0; + size = 0; + while (size < PAGE_SIZE && plane < OMAPFB_PLANE_NUM) { + omapfb_get_caps(fbdev, plane, &caps); + size += scnprintf(&buf[size], PAGE_SIZE - size, + "plane#%d %#010x %#010x %#010x\n", + plane, caps.ctrl, caps.plane_color, caps.wnd_color); + plane++; + } + return size; +} + +static ssize_t omapfb_show_caps_text(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct omapfb_device *fbdev = dev_get_drvdata(dev); + int i; + struct omapfb_caps caps; + int plane; + size_t size; + + plane = 0; + size = 0; + while (size < PAGE_SIZE && plane < OMAPFB_PLANE_NUM) { + omapfb_get_caps(fbdev, plane, &caps); + size += scnprintf(&buf[size], PAGE_SIZE - size, + "plane#%d:\n", plane); + for (i = 0; i < ARRAY_SIZE(ctrl_caps) && + size < PAGE_SIZE; i++) { + if (ctrl_caps[i].flag & caps.ctrl) + size += scnprintf(&buf[size], PAGE_SIZE - size, + " %s\n", ctrl_caps[i].name); + } + size += scnprintf(&buf[size], PAGE_SIZE - size, + " plane colors:\n"); + for (i = 0; i < ARRAY_SIZE(color_caps) && + size < PAGE_SIZE; i++) { + if (color_caps[i].flag & caps.plane_color) + size += scnprintf(&buf[size], PAGE_SIZE - size, + " %s\n", color_caps[i].name); + } + size += scnprintf(&buf[size], PAGE_SIZE - size, + " window colors:\n"); + for (i = 0; i < ARRAY_SIZE(color_caps) && + size < PAGE_SIZE; i++) { + if (color_caps[i].flag & caps.wnd_color) + size += scnprintf(&buf[size], PAGE_SIZE - size, + " %s\n", color_caps[i].name); + } + + plane++; + } + return size; +} + +static DEVICE_ATTR(caps_num, 0444, omapfb_show_caps_num, NULL); +static DEVICE_ATTR(caps_text, 0444, omapfb_show_caps_text, NULL); + +/* panel sysfs entries */ +static ssize_t omapfb_show_panel_name(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct omapfb_device *fbdev = dev_get_drvdata(dev); + + return snprintf(buf, PAGE_SIZE, "%s\n", fbdev->panel->name); +} + +static ssize_t omapfb_show_bklight_level(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct omapfb_device *fbdev = dev_get_drvdata(dev); + int r; + + if (fbdev->panel->get_bklight_level) { + r = snprintf(buf, PAGE_SIZE, "%d\n", + fbdev->panel->get_bklight_level(fbdev->panel)); + } else + r = -ENODEV; + return r; +} + +static ssize_t omapfb_store_bklight_level(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t size) +{ + struct omapfb_device *fbdev = dev_get_drvdata(dev); + int r; + + if (fbdev->panel->set_bklight_level) { + unsigned int level; + + if (sscanf(buf, "%10d", &level) == 1) { + r = fbdev->panel->set_bklight_level(fbdev->panel, + level); + } else + r = -EINVAL; + } else + r = -ENODEV; + return r ? r : size; +} + +static ssize_t omapfb_show_bklight_max(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct omapfb_device *fbdev = dev_get_drvdata(dev); + int r; + + if (fbdev->panel->get_bklight_level) { + r = snprintf(buf, PAGE_SIZE, "%d\n", + fbdev->panel->get_bklight_max(fbdev->panel)); + } else + r = -ENODEV; + return r; +} + +static struct device_attribute dev_attr_panel_name = + __ATTR(name, 0444, omapfb_show_panel_name, NULL); +static DEVICE_ATTR(backlight_level, 0664, + omapfb_show_bklight_level, omapfb_store_bklight_level); +static DEVICE_ATTR(backlight_max, 0444, omapfb_show_bklight_max, NULL); + +static struct attribute *panel_attrs[] = { + &dev_attr_panel_name.attr, + &dev_attr_backlight_level.attr, + &dev_attr_backlight_max.attr, + NULL, +}; + +static const struct attribute_group panel_attr_grp = { + .name = "panel", + .attrs = panel_attrs, +}; + +/* ctrl sysfs entries */ +static ssize_t omapfb_show_ctrl_name(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct omapfb_device *fbdev = dev_get_drvdata(dev); + + return snprintf(buf, PAGE_SIZE, "%s\n", fbdev->ctrl->name); +} + +static struct device_attribute dev_attr_ctrl_name = + __ATTR(name, 0444, omapfb_show_ctrl_name, NULL); + +static struct attribute *ctrl_attrs[] = { + &dev_attr_ctrl_name.attr, + NULL, +}; + +static const struct attribute_group ctrl_attr_grp = { + .name = "ctrl", + .attrs = ctrl_attrs, +}; + +static int omapfb_register_sysfs(struct omapfb_device *fbdev) +{ + int r; + + if ((r = device_create_file(fbdev->dev, &dev_attr_caps_num))) + goto fail0; + + if ((r = device_create_file(fbdev->dev, &dev_attr_caps_text))) + goto fail1; + + if ((r = sysfs_create_group(&fbdev->dev->kobj, &panel_attr_grp))) + goto fail2; + + if ((r = sysfs_create_group(&fbdev->dev->kobj, &ctrl_attr_grp))) + goto fail3; + + return 0; +fail3: + sysfs_remove_group(&fbdev->dev->kobj, &panel_attr_grp); +fail2: + device_remove_file(fbdev->dev, &dev_attr_caps_text); +fail1: + device_remove_file(fbdev->dev, &dev_attr_caps_num); +fail0: + dev_err(fbdev->dev, "unable to register sysfs interface\n"); + return r; +} + +static void omapfb_unregister_sysfs(struct omapfb_device *fbdev) +{ + sysfs_remove_group(&fbdev->dev->kobj, &ctrl_attr_grp); + sysfs_remove_group(&fbdev->dev->kobj, &panel_attr_grp); + device_remove_file(fbdev->dev, &dev_attr_caps_num); + device_remove_file(fbdev->dev, &dev_attr_caps_text); +} + +/* + * --------------------------------------------------------------------------- + * LDM callbacks + * --------------------------------------------------------------------------- + */ +/* Initialize system fb_info object and set the default video mode. + * The frame buffer memory already allocated by lcddma_init + */ +static int fbinfo_init(struct omapfb_device *fbdev, struct fb_info *info) +{ + struct fb_var_screeninfo *var = &info->var; + struct fb_fix_screeninfo *fix = &info->fix; + int r = 0; + + info->fbops = &omapfb_ops; + info->flags = FBINFO_FLAG_DEFAULT; + + strncpy(fix->id, MODULE_NAME, sizeof(fix->id)); + + info->pseudo_palette = fbdev->pseudo_palette; + + var->accel_flags = def_accel ? FB_ACCELF_TEXT : 0; + var->xres = def_vxres; + var->yres = def_vyres; + var->xres_virtual = def_vxres; + var->yres_virtual = def_vyres; + var->rotate = def_rotate; + var->bits_per_pixel = fbdev->panel->bpp; + + set_fb_var(info, var); + set_fb_fix(info, 1); + + r = fb_alloc_cmap(&info->cmap, 16, 0); + if (r != 0) + dev_err(fbdev->dev, "unable to allocate color map memory\n"); + + return r; +} + +/* Release the fb_info object */ +static void fbinfo_cleanup(struct omapfb_device *fbdev, struct fb_info *fbi) +{ + fb_dealloc_cmap(&fbi->cmap); +} + +static void planes_cleanup(struct omapfb_device *fbdev) +{ + int i; + + for (i = 0; i < fbdev->mem_desc.region_cnt; i++) { + if (fbdev->fb_info[i] == NULL) + break; + fbinfo_cleanup(fbdev, fbdev->fb_info[i]); + framebuffer_release(fbdev->fb_info[i]); + } +} + +static int planes_init(struct omapfb_device *fbdev) +{ + struct fb_info *fbi; + int i; + int r; + + for (i = 0; i < fbdev->mem_desc.region_cnt; i++) { + struct omapfb_plane_struct *plane; + fbi = framebuffer_alloc(sizeof(struct omapfb_plane_struct), + fbdev->dev); + if (fbi == NULL) { + planes_cleanup(fbdev); + return -ENOMEM; + } + plane = fbi->par; + plane->idx = i; + plane->fbdev = fbdev; + plane->info.mirror = def_mirror; + fbdev->fb_info[i] = fbi; + + if ((r = fbinfo_init(fbdev, fbi)) < 0) { + framebuffer_release(fbi); + planes_cleanup(fbdev); + return r; + } + plane->info.out_width = fbi->var.xres; + plane->info.out_height = fbi->var.yres; + } + return 0; +} + +/* + * Free driver resources. Can be called to rollback an aborted initialization + * sequence. + */ +static void omapfb_free_resources(struct omapfb_device *fbdev, int state) +{ + int i; + + switch (state) { + case OMAPFB_ACTIVE: + for (i = 0; i < fbdev->mem_desc.region_cnt; i++) + unregister_framebuffer(fbdev->fb_info[i]); + fallthrough; + case 7: + omapfb_unregister_sysfs(fbdev); + fallthrough; + case 6: + if (fbdev->panel->disable) + fbdev->panel->disable(fbdev->panel); + fallthrough; + case 5: + omapfb_set_update_mode(fbdev, OMAPFB_UPDATE_DISABLED); + fallthrough; + case 4: + planes_cleanup(fbdev); + fallthrough; + case 3: + ctrl_cleanup(fbdev); + fallthrough; + case 2: + if (fbdev->panel->cleanup) + fbdev->panel->cleanup(fbdev->panel); + fallthrough; + case 1: + dev_set_drvdata(fbdev->dev, NULL); + kfree(fbdev); + case 0: + /* nothing to free */ + break; + default: + BUG(); + } +} + +static int omapfb_find_ctrl(struct omapfb_device *fbdev) +{ + struct omapfb_platform_data *conf; + char name[17]; + int i; + + conf = dev_get_platdata(fbdev->dev); + + fbdev->ctrl = NULL; + + strncpy(name, conf->lcd.ctrl_name, sizeof(name) - 1); + name[sizeof(name) - 1] = '\0'; + + if (strcmp(name, "internal") == 0) { + fbdev->ctrl = fbdev->int_ctrl; + return 0; + } + + for (i = 0; i < ARRAY_SIZE(ctrls); i++) { + dev_dbg(fbdev->dev, "ctrl %s\n", ctrls[i]->name); + if (strcmp(ctrls[i]->name, name) == 0) { + fbdev->ctrl = ctrls[i]; + break; + } + } + + if (fbdev->ctrl == NULL) { + dev_dbg(fbdev->dev, "ctrl %s not supported\n", name); + return -1; + } + + return 0; +} + +/* + * Called by LDM binding to probe and attach a new device. + * Initialization sequence: + * 1. allocate system omapfb_device structure + * 2. select controller type according to platform configuration + * init LCD panel + * 3. init LCD controller and LCD DMA + * 4. init system fb_info structure for all planes + * 5. setup video mode for first plane and enable it + * 6. enable LCD panel + * 7. register sysfs attributes + * OMAPFB_ACTIVE: register system fb_info structure for all planes + */ +static int omapfb_do_probe(struct platform_device *pdev, + struct lcd_panel *panel) +{ + struct omapfb_device *fbdev = NULL; + int init_state; + unsigned long phz, hhz, vhz; + unsigned long vram; + int i; + int r = 0; + + init_state = 0; + + if (pdev->num_resources != 0) { + dev_err(&pdev->dev, "probed for an unknown device\n"); + r = -ENODEV; + goto cleanup; + } + + if (dev_get_platdata(&pdev->dev) == NULL) { + dev_err(&pdev->dev, "missing platform data\n"); + r = -ENOENT; + goto cleanup; + } + + fbdev = kzalloc(sizeof(*fbdev), GFP_KERNEL); + if (fbdev == NULL) { + dev_err(&pdev->dev, + "unable to allocate memory for device info\n"); + r = -ENOMEM; + goto cleanup; + } + init_state++; + + fbdev->dev = &pdev->dev; + fbdev->panel = panel; + fbdev->dssdev = &omapdss_device; + platform_set_drvdata(pdev, fbdev); + + mutex_init(&fbdev->rqueue_mutex); + + fbdev->int_ctrl = &omap1_int_ctrl; +#ifdef CONFIG_FB_OMAP_LCDC_EXTERNAL + fbdev->ext_if = &omap1_ext_if; +#endif + if (omapfb_find_ctrl(fbdev) < 0) { + dev_err(fbdev->dev, + "LCD controller not found, board not supported\n"); + r = -ENODEV; + goto cleanup; + } + + if (fbdev->panel->init) { + r = fbdev->panel->init(fbdev->panel, fbdev); + if (r) + goto cleanup; + } + + pr_info("omapfb: configured for panel %s\n", fbdev->panel->name); + + def_vxres = def_vxres ? def_vxres : fbdev->panel->x_res; + def_vyres = def_vyres ? def_vyres : fbdev->panel->y_res; + + init_state++; + + r = ctrl_init(fbdev); + if (r) + goto cleanup; + if (fbdev->ctrl->mmap != NULL) + omapfb_ops.fb_mmap = omapfb_mmap; + init_state++; + + r = planes_init(fbdev); + if (r) + goto cleanup; + init_state++; + +#ifdef CONFIG_FB_OMAP_DMA_TUNE + /* Set DMA priority for EMIFF access to highest */ + omap_set_dma_priority(0, OMAP_DMA_PORT_EMIFF, 15); +#endif + + r = ctrl_change_mode(fbdev->fb_info[0]); + if (r) { + dev_err(fbdev->dev, "mode setting failed\n"); + goto cleanup; + } + + /* GFX plane is enabled by default */ + r = fbdev->ctrl->enable_plane(OMAPFB_PLANE_GFX, 1); + if (r) + goto cleanup; + + omapfb_set_update_mode(fbdev, manual_update ? + OMAPFB_MANUAL_UPDATE : OMAPFB_AUTO_UPDATE); + init_state++; + + if (fbdev->panel->enable) { + r = fbdev->panel->enable(fbdev->panel); + if (r) + goto cleanup; + } + init_state++; + + r = omapfb_register_sysfs(fbdev); + if (r) + goto cleanup; + init_state++; + + vram = 0; + for (i = 0; i < fbdev->mem_desc.region_cnt; i++) { + r = register_framebuffer(fbdev->fb_info[i]); + if (r != 0) { + dev_err(fbdev->dev, + "registering framebuffer %d failed\n", i); + goto cleanup; + } + vram += fbdev->mem_desc.region[i].size; + } + + fbdev->state = OMAPFB_ACTIVE; + + panel = fbdev->panel; + phz = panel->pixel_clock * 1000; + hhz = phz * 10 / (panel->hfp + panel->x_res + panel->hbp + panel->hsw); + vhz = hhz / (panel->vfp + panel->y_res + panel->vbp + panel->vsw); + + omapfb_dev = fbdev; + + pr_info("omapfb: Framebuffer initialized. Total vram %lu planes %d\n", + vram, fbdev->mem_desc.region_cnt); + pr_info("omapfb: Pixclock %lu kHz hfreq %lu.%lu kHz " + "vfreq %lu.%lu Hz\n", + phz / 1000, hhz / 10000, hhz % 10, vhz / 10, vhz % 10); + + return 0; + +cleanup: + omapfb_free_resources(fbdev, init_state); + + return r; +} + +static int omapfb_probe(struct platform_device *pdev) +{ + int r; + + BUG_ON(fbdev_pdev != NULL); + + r = platform_device_register(&omapdss_device); + if (r) { + dev_err(&pdev->dev, "can't register omapdss device\n"); + return r; + } + + /* Delay actual initialization until the LCD is registered */ + fbdev_pdev = pdev; + if (fbdev_panel != NULL) + omapfb_do_probe(fbdev_pdev, fbdev_panel); + return 0; +} + +void omapfb_register_panel(struct lcd_panel *panel) +{ + BUG_ON(fbdev_panel != NULL); + + fbdev_panel = panel; + if (fbdev_pdev != NULL) + omapfb_do_probe(fbdev_pdev, fbdev_panel); +} +EXPORT_SYMBOL_GPL(omapfb_register_panel); + +/* Called when the device is being detached from the driver */ +static int omapfb_remove(struct platform_device *pdev) +{ + struct omapfb_device *fbdev = platform_get_drvdata(pdev); + enum omapfb_state saved_state = fbdev->state; + + /* FIXME: wait till completion of pending events */ + + fbdev->state = OMAPFB_DISABLED; + omapfb_free_resources(fbdev, saved_state); + + platform_device_unregister(&omapdss_device); + fbdev->dssdev = NULL; + + return 0; +} + +/* PM suspend */ +static int omapfb_suspend(struct platform_device *pdev, pm_message_t mesg) +{ + struct omapfb_device *fbdev = platform_get_drvdata(pdev); + + if (fbdev != NULL) + omapfb_blank(FB_BLANK_POWERDOWN, fbdev->fb_info[0]); + return 0; +} + +/* PM resume */ +static int omapfb_resume(struct platform_device *pdev) +{ + struct omapfb_device *fbdev = platform_get_drvdata(pdev); + + if (fbdev != NULL) + omapfb_blank(FB_BLANK_UNBLANK, fbdev->fb_info[0]); + return 0; +} + +static struct platform_driver omapfb_driver = { + .probe = omapfb_probe, + .remove = omapfb_remove, + .suspend = omapfb_suspend, + .resume = omapfb_resume, + .driver = { + .name = MODULE_NAME, + }, +}; + +#ifndef MODULE + +/* Process kernel command line parameters */ +static int __init omapfb_setup(char *options) +{ + char *this_opt = NULL; + int r = 0; + + pr_debug("omapfb: options %s\n", options); + + if (!options || !*options) + return 0; + + while (!r && (this_opt = strsep(&options, ",")) != NULL) { + if (!strncmp(this_opt, "accel", 5)) + def_accel = 1; + else if (!strncmp(this_opt, "vram:", 5)) { + char *suffix; + unsigned long vram; + vram = (simple_strtoul(this_opt + 5, &suffix, 0)); + switch (suffix[0]) { + case '\0': + break; + case 'm': + case 'M': + vram *= 1024; + fallthrough; + case 'k': + case 'K': + vram *= 1024; + break; + default: + pr_debug("omapfb: invalid vram suffix %c\n", + suffix[0]); + r = -1; + } + def_vram[def_vram_cnt++] = vram; + } + else if (!strncmp(this_opt, "vxres:", 6)) + def_vxres = simple_strtoul(this_opt + 6, NULL, 0); + else if (!strncmp(this_opt, "vyres:", 6)) + def_vyres = simple_strtoul(this_opt + 6, NULL, 0); + else if (!strncmp(this_opt, "rotate:", 7)) + def_rotate = (simple_strtoul(this_opt + 7, NULL, 0)); + else if (!strncmp(this_opt, "mirror:", 7)) + def_mirror = (simple_strtoul(this_opt + 7, NULL, 0)); + else if (!strncmp(this_opt, "manual_update", 13)) + manual_update = 1; + else { + pr_debug("omapfb: invalid option\n"); + r = -1; + } + } + + return r; +} + +#endif + +/* Register both the driver and the device */ +static int __init omapfb_init(void) +{ +#ifndef MODULE + char *option; + + if (fb_get_options("omapfb", &option)) + return -ENODEV; + omapfb_setup(option); +#endif + /* Register the driver with LDM */ + if (platform_driver_register(&omapfb_driver)) { + pr_debug("failed to register omapfb driver\n"); + return -ENODEV; + } + + return 0; +} + +static void __exit omapfb_cleanup(void) +{ + platform_driver_unregister(&omapfb_driver); +} + +module_param_named(accel, def_accel, uint, 0664); +module_param_array_named(vram, def_vram, ulong, &def_vram_cnt, 0664); +module_param_named(vxres, def_vxres, long, 0664); +module_param_named(vyres, def_vyres, long, 0664); +module_param_named(rotate, def_rotate, uint, 0664); +module_param_named(mirror, def_mirror, uint, 0664); +module_param_named(manual_update, manual_update, bool, 0664); + +module_init(omapfb_init); +module_exit(omapfb_cleanup); + +MODULE_DESCRIPTION("TI OMAP framebuffer driver"); +MODULE_AUTHOR("Imre Deak <imre.deak@nokia.com>"); +MODULE_LICENSE("GPL"); |