| /* |
| * OMAP1 internal LCD controller |
| * |
| * Copyright (C) 2004 Nokia Corporation |
| * Author: Imre Deak <imre.deak@nokia.com> |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License as published by the |
| * Free Software Foundation; either version 2 of the License, or (at your |
| * option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, but |
| * WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License along |
| * with this program; if not, write to the Free Software Foundation, Inc., |
| * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| */ |
| #include <linux/module.h> |
| #include <linux/device.h> |
| #include <linux/interrupt.h> |
| #include <linux/spinlock.h> |
| #include <linux/err.h> |
| #include <linux/mm.h> |
| #include <linux/fb.h> |
| #include <linux/dma-mapping.h> |
| #include <linux/vmalloc.h> |
| #include <linux/clk.h> |
| #include <linux/gfp.h> |
| |
| #include <mach/lcdc.h> |
| #include <plat/dma.h> |
| |
| #include <asm/mach-types.h> |
| |
| #include "omapfb.h" |
| |
| #include "lcdc.h" |
| |
| #define MODULE_NAME "lcdc" |
| |
| #define MAX_PALETTE_SIZE PAGE_SIZE |
| |
| enum lcdc_load_mode { |
| OMAP_LCDC_LOAD_PALETTE, |
| OMAP_LCDC_LOAD_FRAME, |
| OMAP_LCDC_LOAD_PALETTE_AND_FRAME |
| }; |
| |
| static struct omap_lcd_controller { |
| enum omapfb_update_mode update_mode; |
| int ext_mode; |
| |
| unsigned long frame_offset; |
| int screen_width; |
| int xres; |
| int yres; |
| |
| enum omapfb_color_format color_mode; |
| int bpp; |
| void *palette_virt; |
| dma_addr_t palette_phys; |
| int palette_code; |
| int palette_size; |
| |
| unsigned int irq_mask; |
| struct completion last_frame_complete; |
| struct completion palette_load_complete; |
| struct clk *lcd_ck; |
| struct omapfb_device *fbdev; |
| |
| void (*dma_callback)(void *data); |
| void *dma_callback_data; |
| |
| int fbmem_allocated; |
| dma_addr_t vram_phys; |
| void *vram_virt; |
| unsigned long vram_size; |
| } lcdc; |
| |
| static void inline enable_irqs(int mask) |
| { |
| lcdc.irq_mask |= mask; |
| } |
| |
| static void inline disable_irqs(int mask) |
| { |
| lcdc.irq_mask &= ~mask; |
| } |
| |
| static void set_load_mode(enum lcdc_load_mode mode) |
| { |
| u32 l; |
| |
| l = omap_readl(OMAP_LCDC_CONTROL); |
| l &= ~(3 << 20); |
| switch (mode) { |
| case OMAP_LCDC_LOAD_PALETTE: |
| l |= 1 << 20; |
| break; |
| case OMAP_LCDC_LOAD_FRAME: |
| l |= 2 << 20; |
| break; |
| case OMAP_LCDC_LOAD_PALETTE_AND_FRAME: |
| break; |
| default: |
| BUG(); |
| } |
| omap_writel(l, OMAP_LCDC_CONTROL); |
| } |
| |
| static void enable_controller(void) |
| { |
| u32 l; |
| |
| l = omap_readl(OMAP_LCDC_CONTROL); |
| l |= OMAP_LCDC_CTRL_LCD_EN; |
| l &= ~OMAP_LCDC_IRQ_MASK; |
| l |= lcdc.irq_mask | OMAP_LCDC_IRQ_DONE; /* enabled IRQs */ |
| omap_writel(l, OMAP_LCDC_CONTROL); |
| } |
| |
| static void disable_controller_async(void) |
| { |
| u32 l; |
| u32 mask; |
| |
| l = omap_readl(OMAP_LCDC_CONTROL); |
| mask = OMAP_LCDC_CTRL_LCD_EN | OMAP_LCDC_IRQ_MASK; |
| /* |
| * Preserve the DONE mask, since we still want to get the |
| * final DONE irq. It will be disabled in the IRQ handler. |
| */ |
| mask &= ~OMAP_LCDC_IRQ_DONE; |
| l &= ~mask; |
| omap_writel(l, OMAP_LCDC_CONTROL); |
| } |
| |
| static void disable_controller(void) |
| { |
| init_completion(&lcdc.last_frame_complete); |
| disable_controller_async(); |
| if (!wait_for_completion_timeout(&lcdc.last_frame_complete, |
| msecs_to_jiffies(500))) |
| dev_err(lcdc.fbdev->dev, "timeout waiting for FRAME DONE\n"); |
| } |
| |
| static void reset_controller(u32 status) |
| { |
| static unsigned long reset_count; |
| static unsigned long last_jiffies; |
| |
| disable_controller_async(); |
| reset_count++; |
| if (reset_count == 1 || time_after(jiffies, last_jiffies + HZ)) { |
| dev_err(lcdc.fbdev->dev, |
| "resetting (status %#010x,reset count %lu)\n", |
| status, reset_count); |
| last_jiffies = jiffies; |
| } |
| if (reset_count < 100) { |
| enable_controller(); |
| } else { |
| reset_count = 0; |
| dev_err(lcdc.fbdev->dev, |
| "too many reset attempts, giving up.\n"); |
| } |
| } |
| |
| /* |
| * Configure the LCD DMA according to the current mode specified by parameters |
| * in lcdc.fbdev and fbdev->var. |
| */ |
| static void setup_lcd_dma(void) |
| { |
| static const int dma_elem_type[] = { |
| 0, |
| OMAP_DMA_DATA_TYPE_S8, |
| OMAP_DMA_DATA_TYPE_S16, |
| 0, |
| OMAP_DMA_DATA_TYPE_S32, |
| }; |
| struct omapfb_plane_struct *plane = lcdc.fbdev->fb_info[0]->par; |
| struct fb_var_screeninfo *var = &lcdc.fbdev->fb_info[0]->var; |
| unsigned long src; |
| int esize, xelem, yelem; |
| |
| src = lcdc.vram_phys + lcdc.frame_offset; |
| |
| switch (var->rotate) { |
| case 0: |
| if (plane->info.mirror || (src & 3) || |
| lcdc.color_mode == OMAPFB_COLOR_YUV420 || |
| (lcdc.xres & 1)) |
| esize = 2; |
| else |
| esize = 4; |
| xelem = lcdc.xres * lcdc.bpp / 8 / esize; |
| yelem = lcdc.yres; |
| break; |
| case 90: |
| case 180: |
| case 270: |
| if (cpu_is_omap15xx()) { |
| BUG(); |
| } |
| esize = 2; |
| xelem = lcdc.yres * lcdc.bpp / 16; |
| yelem = lcdc.xres; |
| break; |
| default: |
| BUG(); |
| return; |
| } |
| #ifdef VERBOSE |
| dev_dbg(lcdc.fbdev->dev, |
| "setup_dma: src %#010lx esize %d xelem %d yelem %d\n", |
| src, esize, xelem, yelem); |
| #endif |
| omap_set_lcd_dma_b1(src, xelem, yelem, dma_elem_type[esize]); |
| if (!cpu_is_omap15xx()) { |
| int bpp = lcdc.bpp; |
| |
| /* |
| * YUV support is only for external mode when we have the |
| * YUV window embedded in a 16bpp frame buffer. |
| */ |
| if (lcdc.color_mode == OMAPFB_COLOR_YUV420) |
| bpp = 16; |
| /* Set virtual xres elem size */ |
| omap_set_lcd_dma_b1_vxres( |
| lcdc.screen_width * bpp / 8 / esize); |
| /* Setup transformations */ |
| omap_set_lcd_dma_b1_rotation(var->rotate); |
| omap_set_lcd_dma_b1_mirror(plane->info.mirror); |
| } |
| omap_setup_lcd_dma(); |
| } |
| |
| static irqreturn_t lcdc_irq_handler(int irq, void *dev_id) |
| { |
| u32 status; |
| |
| status = omap_readl(OMAP_LCDC_STATUS); |
| |
| if (status & (OMAP_LCDC_STAT_FUF | OMAP_LCDC_STAT_SYNC_LOST)) |
| reset_controller(status); |
| else { |
| if (status & OMAP_LCDC_STAT_DONE) { |
| u32 l; |
| |
| /* |
| * Disable IRQ_DONE. The status bit will be cleared |
| * only when the controller is reenabled and we don't |
| * want to get more interrupts. |
| */ |
| l = omap_readl(OMAP_LCDC_CONTROL); |
| l &= ~OMAP_LCDC_IRQ_DONE; |
| omap_writel(l, OMAP_LCDC_CONTROL); |
| complete(&lcdc.last_frame_complete); |
| } |
| if (status & OMAP_LCDC_STAT_LOADED_PALETTE) { |
| disable_controller_async(); |
| complete(&lcdc.palette_load_complete); |
| } |
| } |
| |
| /* |
| * Clear these interrupt status bits. |
| * Sync_lost, FUF bits were cleared by disabling the LCD controller |
| * LOADED_PALETTE can be cleared this way only in palette only |
| * load mode. In other load modes it's cleared by disabling the |
| * controller. |
| */ |
| status &= ~(OMAP_LCDC_STAT_VSYNC | |
| OMAP_LCDC_STAT_LOADED_PALETTE | |
| OMAP_LCDC_STAT_ABC | |
| OMAP_LCDC_STAT_LINE_INT); |
| omap_writel(status, OMAP_LCDC_STATUS); |
| return IRQ_HANDLED; |
| } |
| |
| /* |
| * Change to a new video mode. We defer this to a later time to avoid any |
| * flicker and not to mess up the current LCD DMA context. For this we disable |
| * the LCD controller, which will generate a DONE irq after the last frame has |
| * been transferred. Then it'll be safe to reconfigure both the LCD controller |
| * as well as the LCD DMA. |
| */ |
| static int omap_lcdc_setup_plane(int plane, int channel_out, |
| unsigned long offset, int screen_width, |
| int pos_x, int pos_y, int width, int height, |
| int color_mode) |
| { |
| struct fb_var_screeninfo *var = &lcdc.fbdev->fb_info[0]->var; |
| struct lcd_panel *panel = lcdc.fbdev->panel; |
| int rot_x, rot_y; |
| |
| if (var->rotate == 0) { |
| rot_x = panel->x_res; |
| rot_y = panel->y_res; |
| } else { |
| rot_x = panel->y_res; |
| rot_y = panel->x_res; |
| } |
| if (plane != 0 || channel_out != 0 || pos_x != 0 || pos_y != 0 || |
| width > rot_x || height > rot_y) { |
| #ifdef VERBOSE |
| dev_dbg(lcdc.fbdev->dev, |
| "invalid plane params plane %d pos_x %d pos_y %d " |
| "w %d h %d\n", plane, pos_x, pos_y, width, height); |
| #endif |
| return -EINVAL; |
| } |
| |
| lcdc.frame_offset = offset; |
| lcdc.xres = width; |
| lcdc.yres = height; |
| lcdc.screen_width = screen_width; |
| lcdc.color_mode = color_mode; |
| |
| switch (color_mode) { |
| case OMAPFB_COLOR_CLUT_8BPP: |
| lcdc.bpp = 8; |
| lcdc.palette_code = 0x3000; |
| lcdc.palette_size = 512; |
| break; |
| case OMAPFB_COLOR_RGB565: |
| lcdc.bpp = 16; |
| lcdc.palette_code = 0x4000; |
| lcdc.palette_size = 32; |
| break; |
| case OMAPFB_COLOR_RGB444: |
| lcdc.bpp = 16; |
| lcdc.palette_code = 0x4000; |
| lcdc.palette_size = 32; |
| break; |
| case OMAPFB_COLOR_YUV420: |
| if (lcdc.ext_mode) { |
| lcdc.bpp = 12; |
| break; |
| } |
| /* fallthrough */ |
| case OMAPFB_COLOR_YUV422: |
| if (lcdc.ext_mode) { |
| lcdc.bpp = 16; |
| break; |
| } |
| /* fallthrough */ |
| default: |
| /* FIXME: other BPPs. |
| * bpp1: code 0, size 256 |
| * bpp2: code 0x1000 size 256 |
| * bpp4: code 0x2000 size 256 |
| * bpp12: code 0x4000 size 32 |
| */ |
| dev_dbg(lcdc.fbdev->dev, "invalid color mode %d\n", color_mode); |
| BUG(); |
| return -1; |
| } |
| |
| if (lcdc.ext_mode) { |
| setup_lcd_dma(); |
| return 0; |
| } |
| |
| if (lcdc.update_mode == OMAPFB_AUTO_UPDATE) { |
| disable_controller(); |
| omap_stop_lcd_dma(); |
| setup_lcd_dma(); |
| enable_controller(); |
| } |
| |
| return 0; |
| } |
| |
| static int omap_lcdc_enable_plane(int plane, int enable) |
| { |
| dev_dbg(lcdc.fbdev->dev, |
| "plane %d enable %d update_mode %d ext_mode %d\n", |
| plane, enable, lcdc.update_mode, lcdc.ext_mode); |
| if (plane != OMAPFB_PLANE_GFX) |
| return -EINVAL; |
| |
| return 0; |
| } |
| |
| /* |
| * Configure the LCD DMA for a palette load operation and do the palette |
| * downloading synchronously. We don't use the frame+palette load mode of |
| * the controller, since the palette can always be downloaded separately. |
| */ |
| static void load_palette(void) |
| { |
| u16 *palette; |
| |
| palette = (u16 *)lcdc.palette_virt; |
| |
| *(u16 *)palette &= 0x0fff; |
| *(u16 *)palette |= lcdc.palette_code; |
| |
| omap_set_lcd_dma_b1(lcdc.palette_phys, |
| lcdc.palette_size / 4 + 1, 1, OMAP_DMA_DATA_TYPE_S32); |
| |
| omap_set_lcd_dma_single_transfer(1); |
| omap_setup_lcd_dma(); |
| |
| init_completion(&lcdc.palette_load_complete); |
| enable_irqs(OMAP_LCDC_IRQ_LOADED_PALETTE); |
| set_load_mode(OMAP_LCDC_LOAD_PALETTE); |
| enable_controller(); |
| if (!wait_for_completion_timeout(&lcdc.palette_load_complete, |
| msecs_to_jiffies(500))) |
| dev_err(lcdc.fbdev->dev, "timeout waiting for FRAME DONE\n"); |
| /* The controller gets disabled in the irq handler */ |
| disable_irqs(OMAP_LCDC_IRQ_LOADED_PALETTE); |
| omap_stop_lcd_dma(); |
| |
| omap_set_lcd_dma_single_transfer(lcdc.ext_mode); |
| } |
| |
| /* Used only in internal controller mode */ |
| static int omap_lcdc_setcolreg(u_int regno, u16 red, u16 green, u16 blue, |
| u16 transp, int update_hw_pal) |
| { |
| u16 *palette; |
| |
| if (lcdc.color_mode != OMAPFB_COLOR_CLUT_8BPP || regno > 255) |
| return -EINVAL; |
| |
| palette = (u16 *)lcdc.palette_virt; |
| |
| palette[regno] &= ~0x0fff; |
| palette[regno] |= ((red >> 12) << 8) | ((green >> 12) << 4 ) | |
| (blue >> 12); |
| |
| if (update_hw_pal) { |
| disable_controller(); |
| omap_stop_lcd_dma(); |
| load_palette(); |
| setup_lcd_dma(); |
| set_load_mode(OMAP_LCDC_LOAD_FRAME); |
| enable_controller(); |
| } |
| |
| return 0; |
| } |
| |
| static void calc_ck_div(int is_tft, int pck, int *pck_div) |
| { |
| unsigned long lck; |
| |
| pck = max(1, pck); |
| lck = clk_get_rate(lcdc.lcd_ck); |
| *pck_div = (lck + pck - 1) / pck; |
| if (is_tft) |
| *pck_div = max(2, *pck_div); |
| else |
| *pck_div = max(3, *pck_div); |
| if (*pck_div > 255) { |
| /* FIXME: try to adjust logic clock divider as well */ |
| *pck_div = 255; |
| dev_warn(lcdc.fbdev->dev, "pixclock %d kHz too low.\n", |
| pck / 1000); |
| } |
| } |
| |
| static void inline setup_regs(void) |
| { |
| u32 l; |
| struct lcd_panel *panel = lcdc.fbdev->panel; |
| int is_tft = panel->config & OMAP_LCDC_PANEL_TFT; |
| unsigned long lck; |
| int pcd; |
| |
| l = omap_readl(OMAP_LCDC_CONTROL); |
| l &= ~OMAP_LCDC_CTRL_LCD_TFT; |
| l |= is_tft ? OMAP_LCDC_CTRL_LCD_TFT : 0; |
| #ifdef CONFIG_MACH_OMAP_PALMTE |
| /* FIXME:if (machine_is_omap_palmte()) { */ |
| /* PalmTE uses alternate TFT setting in 8BPP mode */ |
| l |= (is_tft && panel->bpp == 8) ? 0x810000 : 0; |
| /* } */ |
| #endif |
| omap_writel(l, OMAP_LCDC_CONTROL); |
| |
| l = omap_readl(OMAP_LCDC_TIMING2); |
| l &= ~(((1 << 6) - 1) << 20); |
| l |= (panel->config & OMAP_LCDC_SIGNAL_MASK) << 20; |
| omap_writel(l, OMAP_LCDC_TIMING2); |
| |
| l = panel->x_res - 1; |
| l |= (panel->hsw - 1) << 10; |
| l |= (panel->hfp - 1) << 16; |
| l |= (panel->hbp - 1) << 24; |
| omap_writel(l, OMAP_LCDC_TIMING0); |
| |
| l = panel->y_res - 1; |
| l |= (panel->vsw - 1) << 10; |
| l |= panel->vfp << 16; |
| l |= panel->vbp << 24; |
| omap_writel(l, OMAP_LCDC_TIMING1); |
| |
| l = omap_readl(OMAP_LCDC_TIMING2); |
| l &= ~0xff; |
| |
| lck = clk_get_rate(lcdc.lcd_ck); |
| |
| if (!panel->pcd) |
| calc_ck_div(is_tft, panel->pixel_clock * 1000, &pcd); |
| else { |
| dev_warn(lcdc.fbdev->dev, |
| "Pixel clock divider value is obsolete.\n" |
| "Try to set pixel_clock to %lu and pcd to 0 " |
| "in drivers/video/omap/lcd_%s.c and submit a patch.\n", |
| lck / panel->pcd / 1000, panel->name); |
| |
| pcd = panel->pcd; |
| } |
| l |= pcd & 0xff; |
| l |= panel->acb << 8; |
| omap_writel(l, OMAP_LCDC_TIMING2); |
| |
| /* update panel info with the exact clock */ |
| panel->pixel_clock = lck / pcd / 1000; |
| } |
| |
| /* |
| * Configure the LCD controller, download the color palette and start a looped |
| * DMA transfer of the frame image data. Called only in internal |
| * controller mode. |
| */ |
| static int omap_lcdc_set_update_mode(enum omapfb_update_mode mode) |
| { |
| int r = 0; |
| |
| if (mode != lcdc.update_mode) { |
| switch (mode) { |
| case OMAPFB_AUTO_UPDATE: |
| setup_regs(); |
| load_palette(); |
| |
| /* Setup and start LCD DMA */ |
| setup_lcd_dma(); |
| |
| set_load_mode(OMAP_LCDC_LOAD_FRAME); |
| enable_irqs(OMAP_LCDC_IRQ_DONE); |
| /* This will start the actual DMA transfer */ |
| enable_controller(); |
| lcdc.update_mode = mode; |
| break; |
| case OMAPFB_UPDATE_DISABLED: |
| disable_controller(); |
| omap_stop_lcd_dma(); |
| lcdc.update_mode = mode; |
| break; |
| default: |
| r = -EINVAL; |
| } |
| } |
| |
| return r; |
| } |
| |
| static enum omapfb_update_mode omap_lcdc_get_update_mode(void) |
| { |
| return lcdc.update_mode; |
| } |
| |
| /* PM code called only in internal controller mode */ |
| static void omap_lcdc_suspend(void) |
| { |
| if (lcdc.update_mode == OMAPFB_AUTO_UPDATE) { |
| disable_controller(); |
| omap_stop_lcd_dma(); |
| } |
| } |
| |
| static void omap_lcdc_resume(void) |
| { |
| if (lcdc.update_mode == OMAPFB_AUTO_UPDATE) { |
| setup_regs(); |
| load_palette(); |
| setup_lcd_dma(); |
| set_load_mode(OMAP_LCDC_LOAD_FRAME); |
| enable_irqs(OMAP_LCDC_IRQ_DONE); |
| enable_controller(); |
| } |
| } |
| |
| static void omap_lcdc_get_caps(int plane, struct omapfb_caps *caps) |
| { |
| return; |
| } |
| |
| int omap_lcdc_set_dma_callback(void (*callback)(void *data), void *data) |
| { |
| BUG_ON(callback == NULL); |
| |
| if (lcdc.dma_callback) |
| return -EBUSY; |
| else { |
| lcdc.dma_callback = callback; |
| lcdc.dma_callback_data = data; |
| } |
| return 0; |
| } |
| EXPORT_SYMBOL(omap_lcdc_set_dma_callback); |
| |
| void omap_lcdc_free_dma_callback(void) |
| { |
| lcdc.dma_callback = NULL; |
| } |
| EXPORT_SYMBOL(omap_lcdc_free_dma_callback); |
| |
| static void lcdc_dma_handler(u16 status, void *data) |
| { |
| if (lcdc.dma_callback) |
| lcdc.dma_callback(lcdc.dma_callback_data); |
| } |
| |
| static int mmap_kern(void) |
| { |
| struct vm_struct *kvma; |
| struct vm_area_struct vma; |
| pgprot_t pgprot; |
| unsigned long vaddr; |
| |
| kvma = get_vm_area(lcdc.vram_size, VM_IOREMAP); |
| if (kvma == NULL) { |
| dev_err(lcdc.fbdev->dev, "can't get kernel vm area\n"); |
| return -ENOMEM; |
| } |
| vma.vm_mm = &init_mm; |
| |
| vaddr = (unsigned long)kvma->addr; |
| vma.vm_start = vaddr; |
| vma.vm_end = vaddr + lcdc.vram_size; |
| |
| pgprot = pgprot_writecombine(pgprot_kernel); |
| if (io_remap_pfn_range(&vma, vaddr, |
| lcdc.vram_phys >> PAGE_SHIFT, |
| lcdc.vram_size, pgprot) < 0) { |
| dev_err(lcdc.fbdev->dev, "kernel mmap for FB memory failed\n"); |
| return -EAGAIN; |
| } |
| |
| lcdc.vram_virt = (void *)vaddr; |
| |
| return 0; |
| } |
| |
| static void unmap_kern(void) |
| { |
| vunmap(lcdc.vram_virt); |
| } |
| |
| static int alloc_palette_ram(void) |
| { |
| lcdc.palette_virt = dma_alloc_writecombine(lcdc.fbdev->dev, |
| MAX_PALETTE_SIZE, &lcdc.palette_phys, GFP_KERNEL); |
| if (lcdc.palette_virt == NULL) { |
| dev_err(lcdc.fbdev->dev, "failed to alloc palette memory\n"); |
| return -ENOMEM; |
| } |
| memset(lcdc.palette_virt, 0, MAX_PALETTE_SIZE); |
| |
| return 0; |
| } |
| |
| static void free_palette_ram(void) |
| { |
| dma_free_writecombine(lcdc.fbdev->dev, MAX_PALETTE_SIZE, |
| lcdc.palette_virt, lcdc.palette_phys); |
| } |
| |
| static int alloc_fbmem(struct omapfb_mem_region *region) |
| { |
| int bpp; |
| int frame_size; |
| struct lcd_panel *panel = lcdc.fbdev->panel; |
| |
| bpp = panel->bpp; |
| if (bpp == 12) |
| bpp = 16; |
| frame_size = PAGE_ALIGN(panel->x_res * bpp / 8 * panel->y_res); |
| if (region->size > frame_size) |
| frame_size = region->size; |
| lcdc.vram_size = frame_size; |
| lcdc.vram_virt = dma_alloc_writecombine(lcdc.fbdev->dev, |
| lcdc.vram_size, &lcdc.vram_phys, GFP_KERNEL); |
| if (lcdc.vram_virt == NULL) { |
| dev_err(lcdc.fbdev->dev, "unable to allocate FB DMA memory\n"); |
| return -ENOMEM; |
| } |
| region->size = frame_size; |
| region->paddr = lcdc.vram_phys; |
| region->vaddr = lcdc.vram_virt; |
| region->alloc = 1; |
| |
| memset(lcdc.vram_virt, 0, lcdc.vram_size); |
| |
| return 0; |
| } |
| |
| static void free_fbmem(void) |
| { |
| dma_free_writecombine(lcdc.fbdev->dev, lcdc.vram_size, |
| lcdc.vram_virt, lcdc.vram_phys); |
| } |
| |
| static int setup_fbmem(struct omapfb_mem_desc *req_md) |
| { |
| int r; |
| |
| if (!req_md->region_cnt) { |
| dev_err(lcdc.fbdev->dev, "no memory regions defined\n"); |
| return -EINVAL; |
| } |
| |
| if (req_md->region_cnt > 1) { |
| dev_err(lcdc.fbdev->dev, "only one plane is supported\n"); |
| req_md->region_cnt = 1; |
| } |
| |
| if (req_md->region[0].paddr == 0) { |
| lcdc.fbmem_allocated = 1; |
| if ((r = alloc_fbmem(&req_md->region[0])) < 0) |
| return r; |
| return 0; |
| } |
| |
| lcdc.vram_phys = req_md->region[0].paddr; |
| lcdc.vram_size = req_md->region[0].size; |
| |
| if ((r = mmap_kern()) < 0) |
| return r; |
| |
| dev_dbg(lcdc.fbdev->dev, "vram at %08x size %08lx mapped to 0x%p\n", |
| lcdc.vram_phys, lcdc.vram_size, lcdc.vram_virt); |
| |
| return 0; |
| } |
| |
| static void cleanup_fbmem(void) |
| { |
| if (lcdc.fbmem_allocated) |
| free_fbmem(); |
| else |
| unmap_kern(); |
| } |
| |
| static int omap_lcdc_init(struct omapfb_device *fbdev, int ext_mode, |
| struct omapfb_mem_desc *req_vram) |
| { |
| int r; |
| u32 l; |
| int rate; |
| struct clk *tc_ck; |
| |
| lcdc.irq_mask = 0; |
| |
| lcdc.fbdev = fbdev; |
| lcdc.ext_mode = ext_mode; |
| |
| l = 0; |
| omap_writel(l, OMAP_LCDC_CONTROL); |
| |
| /* FIXME: |
| * According to errata some platforms have a clock rate limitiation |
| */ |
| lcdc.lcd_ck = clk_get(fbdev->dev, "lcd_ck"); |
| if (IS_ERR(lcdc.lcd_ck)) { |
| dev_err(fbdev->dev, "unable to access LCD clock\n"); |
| r = PTR_ERR(lcdc.lcd_ck); |
| goto fail0; |
| } |
| |
| tc_ck = clk_get(fbdev->dev, "tc_ck"); |
| if (IS_ERR(tc_ck)) { |
| dev_err(fbdev->dev, "unable to access TC clock\n"); |
| r = PTR_ERR(tc_ck); |
| goto fail1; |
| } |
| |
| rate = clk_get_rate(tc_ck); |
| clk_put(tc_ck); |
| |
| if (machine_is_ams_delta()) |
| rate /= 4; |
| if (machine_is_omap_h3()) |
| rate /= 3; |
| r = clk_set_rate(lcdc.lcd_ck, rate); |
| if (r) { |
| dev_err(fbdev->dev, "failed to adjust LCD rate\n"); |
| goto fail1; |
| } |
| clk_enable(lcdc.lcd_ck); |
| |
| r = request_irq(OMAP_LCDC_IRQ, lcdc_irq_handler, 0, MODULE_NAME, fbdev); |
| if (r) { |
| dev_err(fbdev->dev, "unable to get IRQ\n"); |
| goto fail2; |
| } |
| |
| r = omap_request_lcd_dma(lcdc_dma_handler, NULL); |
| if (r) { |
| dev_err(fbdev->dev, "unable to get LCD DMA\n"); |
| goto fail3; |
| } |
| |
| omap_set_lcd_dma_single_transfer(ext_mode); |
| omap_set_lcd_dma_ext_controller(ext_mode); |
| |
| if (!ext_mode) |
| if ((r = alloc_palette_ram()) < 0) |
| goto fail4; |
| |
| if ((r = setup_fbmem(req_vram)) < 0) |
| goto fail5; |
| |
| pr_info("omapfb: LCDC initialized\n"); |
| |
| return 0; |
| fail5: |
| if (!ext_mode) |
| free_palette_ram(); |
| fail4: |
| omap_free_lcd_dma(); |
| fail3: |
| free_irq(OMAP_LCDC_IRQ, lcdc.fbdev); |
| fail2: |
| clk_disable(lcdc.lcd_ck); |
| fail1: |
| clk_put(lcdc.lcd_ck); |
| fail0: |
| return r; |
| } |
| |
| static void omap_lcdc_cleanup(void) |
| { |
| if (!lcdc.ext_mode) |
| free_palette_ram(); |
| cleanup_fbmem(); |
| omap_free_lcd_dma(); |
| free_irq(OMAP_LCDC_IRQ, lcdc.fbdev); |
| clk_disable(lcdc.lcd_ck); |
| clk_put(lcdc.lcd_ck); |
| } |
| |
| const struct lcd_ctrl omap1_int_ctrl = { |
| .name = "internal", |
| .init = omap_lcdc_init, |
| .cleanup = omap_lcdc_cleanup, |
| .get_caps = omap_lcdc_get_caps, |
| .set_update_mode = omap_lcdc_set_update_mode, |
| .get_update_mode = omap_lcdc_get_update_mode, |
| .update_window = NULL, |
| .suspend = omap_lcdc_suspend, |
| .resume = omap_lcdc_resume, |
| .setup_plane = omap_lcdc_setup_plane, |
| .enable_plane = omap_lcdc_enable_plane, |
| .setcolreg = omap_lcdc_setcolreg, |
| }; |