+++ /dev/null
-/*
- * Driver for AT91/AT32 LCD Controller
- *
- * Copyright (C) 2007 Atmel Corporation
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file COPYING in the main directory of this archive for
- * more details.
- */
-
-#include <linux/kernel.h>
-#include <linux/platform_device.h>
-#include <linux/dma-mapping.h>
-#include <linux/interrupt.h>
-#include <linux/clk.h>
-#include <linux/fb.h>
-#include <linux/init.h>
-#include <linux/delay.h>
-#include <linux/backlight.h>
-#include <linux/gfp.h>
-#include <linux/module.h>
-#include <linux/platform_data/atmel.h>
-#include <linux/of.h>
-#include <linux/of_device.h>
-#include <linux/of_gpio.h>
-#include <video/of_display_timing.h>
-#include <video/videomode.h>
-
-#include <mach/cpu.h>
-#include <asm/gpio.h>
-
-#include <video/atmel_lcdc.h>
-
-struct atmel_lcdfb_config {
- bool have_alt_pixclock;
- bool have_hozval;
- bool have_intensity_bit;
-};
-
- /* LCD Controller info data structure, stored in device platform_data */
-struct atmel_lcdfb_info {
- spinlock_t lock;
- struct fb_info *info;
- void __iomem *mmio;
- int irq_base;
- struct work_struct task;
-
- unsigned int smem_len;
- struct platform_device *pdev;
- struct clk *bus_clk;
- struct clk *lcdc_clk;
-
- struct backlight_device *backlight;
- u8 bl_power;
- u8 saved_lcdcon;
-
- u32 pseudo_palette[16];
- bool have_intensity_bit;
-
- struct atmel_lcdfb_pdata pdata;
-
- struct atmel_lcdfb_config *config;
-};
-
-struct atmel_lcdfb_power_ctrl_gpio {
- int gpio;
- int active_low;
-
- struct list_head list;
-};
-
-#define lcdc_readl(sinfo, reg) __raw_readl((sinfo)->mmio+(reg))
-#define lcdc_writel(sinfo, reg, val) __raw_writel((val), (sinfo)->mmio+(reg))
-
-/* configurable parameters */
-#define ATMEL_LCDC_CVAL_DEFAULT 0xc8
-#define ATMEL_LCDC_DMA_BURST_LEN 8 /* words */
-#define ATMEL_LCDC_FIFO_SIZE 512 /* words */
-
-static struct atmel_lcdfb_config at91sam9261_config = {
- .have_hozval = true,
- .have_intensity_bit = true,
-};
-
-static struct atmel_lcdfb_config at91sam9263_config = {
- .have_intensity_bit = true,
-};
-
-static struct atmel_lcdfb_config at91sam9g10_config = {
- .have_hozval = true,
-};
-
-static struct atmel_lcdfb_config at91sam9g45_config = {
- .have_alt_pixclock = true,
-};
-
-static struct atmel_lcdfb_config at91sam9g45es_config = {
-};
-
-static struct atmel_lcdfb_config at91sam9rl_config = {
- .have_intensity_bit = true,
-};
-
-static struct atmel_lcdfb_config at32ap_config = {
- .have_hozval = true,
-};
-
-static const struct platform_device_id atmel_lcdfb_devtypes[] = {
- {
- .name = "at91sam9261-lcdfb",
- .driver_data = (unsigned long)&at91sam9261_config,
- }, {
- .name = "at91sam9263-lcdfb",
- .driver_data = (unsigned long)&at91sam9263_config,
- }, {
- .name = "at91sam9g10-lcdfb",
- .driver_data = (unsigned long)&at91sam9g10_config,
- }, {
- .name = "at91sam9g45-lcdfb",
- .driver_data = (unsigned long)&at91sam9g45_config,
- }, {
- .name = "at91sam9g45es-lcdfb",
- .driver_data = (unsigned long)&at91sam9g45es_config,
- }, {
- .name = "at91sam9rl-lcdfb",
- .driver_data = (unsigned long)&at91sam9rl_config,
- }, {
- .name = "at32ap-lcdfb",
- .driver_data = (unsigned long)&at32ap_config,
- }, {
- /* terminator */
- }
-};
-MODULE_DEVICE_TABLE(platform, atmel_lcdfb_devtypes);
-
-static struct atmel_lcdfb_config *
-atmel_lcdfb_get_config(struct platform_device *pdev)
-{
- unsigned long data;
-
- data = platform_get_device_id(pdev)->driver_data;
-
- return (struct atmel_lcdfb_config *)data;
-}
-
-#if defined(CONFIG_ARCH_AT91)
-#define ATMEL_LCDFB_FBINFO_DEFAULT (FBINFO_DEFAULT \
- | FBINFO_PARTIAL_PAN_OK \
- | FBINFO_HWACCEL_YPAN)
-
-static inline void atmel_lcdfb_update_dma2d(struct atmel_lcdfb_info *sinfo,
- struct fb_var_screeninfo *var,
- struct fb_info *info)
-{
-
-}
-#elif defined(CONFIG_AVR32)
-#define ATMEL_LCDFB_FBINFO_DEFAULT (FBINFO_DEFAULT \
- | FBINFO_PARTIAL_PAN_OK \
- | FBINFO_HWACCEL_XPAN \
- | FBINFO_HWACCEL_YPAN)
-
-static void atmel_lcdfb_update_dma2d(struct atmel_lcdfb_info *sinfo,
- struct fb_var_screeninfo *var,
- struct fb_info *info)
-{
- u32 dma2dcfg;
- u32 pixeloff;
-
- pixeloff = (var->xoffset * info->var.bits_per_pixel) & 0x1f;
-
- dma2dcfg = (info->var.xres_virtual - info->var.xres)
- * info->var.bits_per_pixel / 8;
- dma2dcfg |= pixeloff << ATMEL_LCDC_PIXELOFF_OFFSET;
- lcdc_writel(sinfo, ATMEL_LCDC_DMA2DCFG, dma2dcfg);
-
- /* Update configuration */
- lcdc_writel(sinfo, ATMEL_LCDC_DMACON,
- lcdc_readl(sinfo, ATMEL_LCDC_DMACON)
- | ATMEL_LCDC_DMAUPDT);
-}
-#endif
-
-static u32 contrast_ctr = ATMEL_LCDC_PS_DIV8
- | ATMEL_LCDC_POL_POSITIVE
- | ATMEL_LCDC_ENA_PWMENABLE;
-
-#ifdef CONFIG_BACKLIGHT_ATMEL_LCDC
-
-/* some bl->props field just changed */
-static int atmel_bl_update_status(struct backlight_device *bl)
-{
- struct atmel_lcdfb_info *sinfo = bl_get_data(bl);
- int power = sinfo->bl_power;
- int brightness = bl->props.brightness;
-
- /* REVISIT there may be a meaningful difference between
- * fb_blank and power ... there seem to be some cases
- * this doesn't handle correctly.
- */
- if (bl->props.fb_blank != sinfo->bl_power)
- power = bl->props.fb_blank;
- else if (bl->props.power != sinfo->bl_power)
- power = bl->props.power;
-
- if (brightness < 0 && power == FB_BLANK_UNBLANK)
- brightness = lcdc_readl(sinfo, ATMEL_LCDC_CONTRAST_VAL);
- else if (power != FB_BLANK_UNBLANK)
- brightness = 0;
-
- lcdc_writel(sinfo, ATMEL_LCDC_CONTRAST_VAL, brightness);
- if (contrast_ctr & ATMEL_LCDC_POL_POSITIVE)
- lcdc_writel(sinfo, ATMEL_LCDC_CONTRAST_CTR,
- brightness ? contrast_ctr : 0);
- else
- lcdc_writel(sinfo, ATMEL_LCDC_CONTRAST_CTR, contrast_ctr);
-
- bl->props.fb_blank = bl->props.power = sinfo->bl_power = power;
-
- return 0;
-}
-
-static int atmel_bl_get_brightness(struct backlight_device *bl)
-{
- struct atmel_lcdfb_info *sinfo = bl_get_data(bl);
-
- return lcdc_readl(sinfo, ATMEL_LCDC_CONTRAST_VAL);
-}
-
-static const struct backlight_ops atmel_lcdc_bl_ops = {
- .update_status = atmel_bl_update_status,
- .get_brightness = atmel_bl_get_brightness,
-};
-
-static void init_backlight(struct atmel_lcdfb_info *sinfo)
-{
- struct backlight_properties props;
- struct backlight_device *bl;
-
- sinfo->bl_power = FB_BLANK_UNBLANK;
-
- if (sinfo->backlight)
- return;
-
- memset(&props, 0, sizeof(struct backlight_properties));
- props.type = BACKLIGHT_RAW;
- props.max_brightness = 0xff;
- bl = backlight_device_register("backlight", &sinfo->pdev->dev, sinfo,
- &atmel_lcdc_bl_ops, &props);
- if (IS_ERR(bl)) {
- dev_err(&sinfo->pdev->dev, "error %ld on backlight register\n",
- PTR_ERR(bl));
- return;
- }
- sinfo->backlight = bl;
-
- bl->props.power = FB_BLANK_UNBLANK;
- bl->props.fb_blank = FB_BLANK_UNBLANK;
- bl->props.brightness = atmel_bl_get_brightness(bl);
-}
-
-static void exit_backlight(struct atmel_lcdfb_info *sinfo)
-{
- if (!sinfo->backlight)
- return;
-
- if (sinfo->backlight->ops) {
- sinfo->backlight->props.power = FB_BLANK_POWERDOWN;
- sinfo->backlight->ops->update_status(sinfo->backlight);
- }
- backlight_device_unregister(sinfo->backlight);
-}
-
-#else
-
-static void init_backlight(struct atmel_lcdfb_info *sinfo)
-{
- dev_warn(&sinfo->pdev->dev, "backlight control is not available\n");
-}
-
-static void exit_backlight(struct atmel_lcdfb_info *sinfo)
-{
-}
-
-#endif
-
-static void init_contrast(struct atmel_lcdfb_info *sinfo)
-{
- struct atmel_lcdfb_pdata *pdata = &sinfo->pdata;
-
- /* contrast pwm can be 'inverted' */
- if (pdata->lcdcon_pol_negative)
- contrast_ctr &= ~(ATMEL_LCDC_POL_POSITIVE);
-
- /* have some default contrast/backlight settings */
- lcdc_writel(sinfo, ATMEL_LCDC_CONTRAST_CTR, contrast_ctr);
- lcdc_writel(sinfo, ATMEL_LCDC_CONTRAST_VAL, ATMEL_LCDC_CVAL_DEFAULT);
-
- if (pdata->lcdcon_is_backlight)
- init_backlight(sinfo);
-}
-
-static inline void atmel_lcdfb_power_control(struct atmel_lcdfb_info *sinfo, int on)
-{
- struct atmel_lcdfb_pdata *pdata = &sinfo->pdata;
-
- if (pdata->atmel_lcdfb_power_control)
- pdata->atmel_lcdfb_power_control(pdata, on);
-}
-
-static struct fb_fix_screeninfo atmel_lcdfb_fix __initdata = {
- .type = FB_TYPE_PACKED_PIXELS,
- .visual = FB_VISUAL_TRUECOLOR,
- .xpanstep = 0,
- .ypanstep = 1,
- .ywrapstep = 0,
- .accel = FB_ACCEL_NONE,
-};
-
-static unsigned long compute_hozval(struct atmel_lcdfb_info *sinfo,
- unsigned long xres)
-{
- unsigned long lcdcon2;
- unsigned long value;
-
- if (!sinfo->config->have_hozval)
- return xres;
-
- lcdcon2 = lcdc_readl(sinfo, ATMEL_LCDC_LCDCON2);
- value = xres;
- if ((lcdcon2 & ATMEL_LCDC_DISTYPE) != ATMEL_LCDC_DISTYPE_TFT) {
- /* STN display */
- if ((lcdcon2 & ATMEL_LCDC_DISTYPE) == ATMEL_LCDC_DISTYPE_STNCOLOR) {
- value *= 3;
- }
- if ( (lcdcon2 & ATMEL_LCDC_IFWIDTH) == ATMEL_LCDC_IFWIDTH_4
- || ( (lcdcon2 & ATMEL_LCDC_IFWIDTH) == ATMEL_LCDC_IFWIDTH_8
- && (lcdcon2 & ATMEL_LCDC_SCANMOD) == ATMEL_LCDC_SCANMOD_DUAL ))
- value = DIV_ROUND_UP(value, 4);
- else
- value = DIV_ROUND_UP(value, 8);
- }
-
- return value;
-}
-
-static void atmel_lcdfb_stop_nowait(struct atmel_lcdfb_info *sinfo)
-{
- struct atmel_lcdfb_pdata *pdata = &sinfo->pdata;
-
- /* Turn off the LCD controller and the DMA controller */
- lcdc_writel(sinfo, ATMEL_LCDC_PWRCON,
- pdata->guard_time << ATMEL_LCDC_GUARDT_OFFSET);
-
- /* Wait for the LCDC core to become idle */
- while (lcdc_readl(sinfo, ATMEL_LCDC_PWRCON) & ATMEL_LCDC_BUSY)
- msleep(10);
-
- lcdc_writel(sinfo, ATMEL_LCDC_DMACON, 0);
-}
-
-static void atmel_lcdfb_stop(struct atmel_lcdfb_info *sinfo)
-{
- atmel_lcdfb_stop_nowait(sinfo);
-
- /* Wait for DMA engine to become idle... */
- while (lcdc_readl(sinfo, ATMEL_LCDC_DMACON) & ATMEL_LCDC_DMABUSY)
- msleep(10);
-}
-
-static void atmel_lcdfb_start(struct atmel_lcdfb_info *sinfo)
-{
- struct atmel_lcdfb_pdata *pdata = &sinfo->pdata;
-
- lcdc_writel(sinfo, ATMEL_LCDC_DMACON, pdata->default_dmacon);
- lcdc_writel(sinfo, ATMEL_LCDC_PWRCON,
- (pdata->guard_time << ATMEL_LCDC_GUARDT_OFFSET)
- | ATMEL_LCDC_PWR);
-}
-
-static void atmel_lcdfb_update_dma(struct fb_info *info,
- struct fb_var_screeninfo *var)
-{
- struct atmel_lcdfb_info *sinfo = info->par;
- struct fb_fix_screeninfo *fix = &info->fix;
- unsigned long dma_addr;
-
- dma_addr = (fix->smem_start + var->yoffset * fix->line_length
- + var->xoffset * info->var.bits_per_pixel / 8);
-
- dma_addr &= ~3UL;
-
- /* Set framebuffer DMA base address and pixel offset */
- lcdc_writel(sinfo, ATMEL_LCDC_DMABADDR1, dma_addr);
-
- atmel_lcdfb_update_dma2d(sinfo, var, info);
-}
-
-static inline void atmel_lcdfb_free_video_memory(struct atmel_lcdfb_info *sinfo)
-{
- struct fb_info *info = sinfo->info;
-
- dma_free_writecombine(info->device, info->fix.smem_len,
- info->screen_base, info->fix.smem_start);
-}
-
-/**
- * atmel_lcdfb_alloc_video_memory - Allocate framebuffer memory
- * @sinfo: the frame buffer to allocate memory for
- *
- * This function is called only from the atmel_lcdfb_probe()
- * so no locking by fb_info->mm_lock around smem_len setting is needed.
- */
-static int atmel_lcdfb_alloc_video_memory(struct atmel_lcdfb_info *sinfo)
-{
- struct fb_info *info = sinfo->info;
- struct fb_var_screeninfo *var = &info->var;
- unsigned int smem_len;
-
- smem_len = (var->xres_virtual * var->yres_virtual
- * ((var->bits_per_pixel + 7) / 8));
- info->fix.smem_len = max(smem_len, sinfo->smem_len);
-
- info->screen_base = dma_alloc_writecombine(info->device, info->fix.smem_len,
- (dma_addr_t *)&info->fix.smem_start, GFP_KERNEL);
-
- if (!info->screen_base) {
- return -ENOMEM;
- }
-
- memset(info->screen_base, 0, info->fix.smem_len);
-
- return 0;
-}
-
-static const struct fb_videomode *atmel_lcdfb_choose_mode(struct fb_var_screeninfo *var,
- struct fb_info *info)
-{
- struct fb_videomode varfbmode;
- const struct fb_videomode *fbmode = NULL;
-
- fb_var_to_videomode(&varfbmode, var);
- fbmode = fb_find_nearest_mode(&varfbmode, &info->modelist);
- if (fbmode)
- fb_videomode_to_var(var, fbmode);
- return fbmode;
-}
-
-
-/**
- * atmel_lcdfb_check_var - Validates a var passed in.
- * @var: frame buffer variable screen structure
- * @info: frame buffer structure that represents a single frame buffer
- *
- * Checks to see if the hardware supports the state requested by
- * var passed in. This function does not alter the hardware
- * state!!! This means the data stored in struct fb_info and
- * struct atmel_lcdfb_info do not change. This includes the var
- * inside of struct fb_info. Do NOT change these. This function
- * can be called on its own if we intent to only test a mode and
- * not actually set it. The stuff in modedb.c is a example of
- * this. If the var passed in is slightly off by what the
- * hardware can support then we alter the var PASSED in to what
- * we can do. If the hardware doesn't support mode change a
- * -EINVAL will be returned by the upper layers. You don't need
- * to implement this function then. If you hardware doesn't
- * support changing the resolution then this function is not
- * needed. In this case the driver would just provide a var that
- * represents the static state the screen is in.
- *
- * Returns negative errno on error, or zero on success.
- */
-static int atmel_lcdfb_check_var(struct fb_var_screeninfo *var,
- struct fb_info *info)
-{
- struct device *dev = info->device;
- struct atmel_lcdfb_info *sinfo = info->par;
- struct atmel_lcdfb_pdata *pdata = &sinfo->pdata;
- unsigned long clk_value_khz;
-
- clk_value_khz = clk_get_rate(sinfo->lcdc_clk) / 1000;
-
- dev_dbg(dev, "%s:\n", __func__);
-
- if (!(var->pixclock && var->bits_per_pixel)) {
- /* choose a suitable mode if possible */
- if (!atmel_lcdfb_choose_mode(var, info)) {
- dev_err(dev, "needed value not specified\n");
- return -EINVAL;
- }
- }
-
- dev_dbg(dev, " resolution: %ux%u\n", var->xres, var->yres);
- dev_dbg(dev, " pixclk: %lu KHz\n", PICOS2KHZ(var->pixclock));
- dev_dbg(dev, " bpp: %u\n", var->bits_per_pixel);
- dev_dbg(dev, " clk: %lu KHz\n", clk_value_khz);
-
- if (PICOS2KHZ(var->pixclock) > clk_value_khz) {
- dev_err(dev, "%lu KHz pixel clock is too fast\n", PICOS2KHZ(var->pixclock));
- return -EINVAL;
- }
-
- /* Do not allow to have real resoulution larger than virtual */
- if (var->xres > var->xres_virtual)
- var->xres_virtual = var->xres;
-
- if (var->yres > var->yres_virtual)
- var->yres_virtual = var->yres;
-
- /* Force same alignment for each line */
- var->xres = (var->xres + 3) & ~3UL;
- var->xres_virtual = (var->xres_virtual + 3) & ~3UL;
-
- var->red.msb_right = var->green.msb_right = var->blue.msb_right = 0;
- var->transp.msb_right = 0;
- var->transp.offset = var->transp.length = 0;
- var->xoffset = var->yoffset = 0;
-
- if (info->fix.smem_len) {
- unsigned int smem_len = (var->xres_virtual * var->yres_virtual
- * ((var->bits_per_pixel + 7) / 8));
- if (smem_len > info->fix.smem_len) {
- dev_err(dev, "Frame buffer is too small (%u) for screen size (need at least %u)\n",
- info->fix.smem_len, smem_len);
- return -EINVAL;
- }
- }
-
- /* Saturate vertical and horizontal timings at maximum values */
- var->vsync_len = min_t(u32, var->vsync_len,
- (ATMEL_LCDC_VPW >> ATMEL_LCDC_VPW_OFFSET) + 1);
- var->upper_margin = min_t(u32, var->upper_margin,
- ATMEL_LCDC_VBP >> ATMEL_LCDC_VBP_OFFSET);
- var->lower_margin = min_t(u32, var->lower_margin,
- ATMEL_LCDC_VFP);
- var->right_margin = min_t(u32, var->right_margin,
- (ATMEL_LCDC_HFP >> ATMEL_LCDC_HFP_OFFSET) + 1);
- var->hsync_len = min_t(u32, var->hsync_len,
- (ATMEL_LCDC_HPW >> ATMEL_LCDC_HPW_OFFSET) + 1);
- var->left_margin = min_t(u32, var->left_margin,
- ATMEL_LCDC_HBP + 1);
-
- /* Some parameters can't be zero */
- var->vsync_len = max_t(u32, var->vsync_len, 1);
- var->right_margin = max_t(u32, var->right_margin, 1);
- var->hsync_len = max_t(u32, var->hsync_len, 1);
- var->left_margin = max_t(u32, var->left_margin, 1);
-
- switch (var->bits_per_pixel) {
- case 1:
- case 2:
- case 4:
- case 8:
- var->red.offset = var->green.offset = var->blue.offset = 0;
- var->red.length = var->green.length = var->blue.length
- = var->bits_per_pixel;
- break;
- case 16:
- /* Older SOCs use IBGR:555 rather than BGR:565. */
- if (sinfo->config->have_intensity_bit)
- var->green.length = 5;
- else
- var->green.length = 6;
-
- if (pdata->lcd_wiring_mode == ATMEL_LCDC_WIRING_RGB) {
- /* RGB:5X5 mode */
- var->red.offset = var->green.length + 5;
- var->blue.offset = 0;
- } else {
- /* BGR:5X5 mode */
- var->red.offset = 0;
- var->blue.offset = var->green.length + 5;
- }
- var->green.offset = 5;
- var->red.length = var->blue.length = 5;
- break;
- case 32:
- var->transp.offset = 24;
- var->transp.length = 8;
- /* fall through */
- case 24:
- if (pdata->lcd_wiring_mode == ATMEL_LCDC_WIRING_RGB) {
- /* RGB:888 mode */
- var->red.offset = 16;
- var->blue.offset = 0;
- } else {
- /* BGR:888 mode */
- var->red.offset = 0;
- var->blue.offset = 16;
- }
- var->green.offset = 8;
- var->red.length = var->green.length = var->blue.length = 8;
- break;
- default:
- dev_err(dev, "color depth %d not supported\n",
- var->bits_per_pixel);
- return -EINVAL;
- }
-
- return 0;
-}
-
-/*
- * LCD reset sequence
- */
-static void atmel_lcdfb_reset(struct atmel_lcdfb_info *sinfo)
-{
- might_sleep();
-
- atmel_lcdfb_stop(sinfo);
- atmel_lcdfb_start(sinfo);
-}
-
-/**
- * atmel_lcdfb_set_par - Alters the hardware state.
- * @info: frame buffer structure that represents a single frame buffer
- *
- * Using the fb_var_screeninfo in fb_info we set the resolution
- * of the this particular framebuffer. This function alters the
- * par AND the fb_fix_screeninfo stored in fb_info. It doesn't
- * not alter var in fb_info since we are using that data. This
- * means we depend on the data in var inside fb_info to be
- * supported by the hardware. atmel_lcdfb_check_var is always called
- * before atmel_lcdfb_set_par to ensure this. Again if you can't
- * change the resolution you don't need this function.
- *
- */
-static int atmel_lcdfb_set_par(struct fb_info *info)
-{
- struct atmel_lcdfb_info *sinfo = info->par;
- struct atmel_lcdfb_pdata *pdata = &sinfo->pdata;
- unsigned long hozval_linesz;
- unsigned long value;
- unsigned long clk_value_khz;
- unsigned long bits_per_line;
- unsigned long pix_factor = 2;
-
- might_sleep();
-
- dev_dbg(info->device, "%s:\n", __func__);
- dev_dbg(info->device, " * resolution: %ux%u (%ux%u virtual)\n",
- info->var.xres, info->var.yres,
- info->var.xres_virtual, info->var.yres_virtual);
-
- atmel_lcdfb_stop_nowait(sinfo);
-
- if (info->var.bits_per_pixel == 1)
- info->fix.visual = FB_VISUAL_MONO01;
- else if (info->var.bits_per_pixel <= 8)
- info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
- else
- info->fix.visual = FB_VISUAL_TRUECOLOR;
-
- bits_per_line = info->var.xres_virtual * info->var.bits_per_pixel;
- info->fix.line_length = DIV_ROUND_UP(bits_per_line, 8);
-
- /* Re-initialize the DMA engine... */
- dev_dbg(info->device, " * update DMA engine\n");
- atmel_lcdfb_update_dma(info, &info->var);
-
- /* ...set frame size and burst length = 8 words (?) */
- value = (info->var.yres * info->var.xres * info->var.bits_per_pixel) / 32;
- value |= ((ATMEL_LCDC_DMA_BURST_LEN - 1) << ATMEL_LCDC_BLENGTH_OFFSET);
- lcdc_writel(sinfo, ATMEL_LCDC_DMAFRMCFG, value);
-
- /* Now, the LCDC core... */
-
- /* Set pixel clock */
- if (sinfo->config->have_alt_pixclock)
- pix_factor = 1;
-
- clk_value_khz = clk_get_rate(sinfo->lcdc_clk) / 1000;
-
- value = DIV_ROUND_UP(clk_value_khz, PICOS2KHZ(info->var.pixclock));
-
- if (value < pix_factor) {
- dev_notice(info->device, "Bypassing pixel clock divider\n");
- lcdc_writel(sinfo, ATMEL_LCDC_LCDCON1, ATMEL_LCDC_BYPASS);
- } else {
- value = (value / pix_factor) - 1;
- dev_dbg(info->device, " * programming CLKVAL = 0x%08lx\n",
- value);
- lcdc_writel(sinfo, ATMEL_LCDC_LCDCON1,
- value << ATMEL_LCDC_CLKVAL_OFFSET);
- info->var.pixclock =
- KHZ2PICOS(clk_value_khz / (pix_factor * (value + 1)));
- dev_dbg(info->device, " updated pixclk: %lu KHz\n",
- PICOS2KHZ(info->var.pixclock));
- }
-
-
- /* Initialize control register 2 */
- value = pdata->default_lcdcon2;
-
- if (!(info->var.sync & FB_SYNC_HOR_HIGH_ACT))
- value |= ATMEL_LCDC_INVLINE_INVERTED;
- if (!(info->var.sync & FB_SYNC_VERT_HIGH_ACT))
- value |= ATMEL_LCDC_INVFRAME_INVERTED;
-
- switch (info->var.bits_per_pixel) {
- case 1: value |= ATMEL_LCDC_PIXELSIZE_1; break;
- case 2: value |= ATMEL_LCDC_PIXELSIZE_2; break;
- case 4: value |= ATMEL_LCDC_PIXELSIZE_4; break;
- case 8: value |= ATMEL_LCDC_PIXELSIZE_8; break;
- case 15: /* fall through */
- case 16: value |= ATMEL_LCDC_PIXELSIZE_16; break;
- case 24: value |= ATMEL_LCDC_PIXELSIZE_24; break;
- case 32: value |= ATMEL_LCDC_PIXELSIZE_32; break;
- default: BUG(); break;
- }
- dev_dbg(info->device, " * LCDCON2 = %08lx\n", value);
- lcdc_writel(sinfo, ATMEL_LCDC_LCDCON2, value);
-
- /* Vertical timing */
- value = (info->var.vsync_len - 1) << ATMEL_LCDC_VPW_OFFSET;
- value |= info->var.upper_margin << ATMEL_LCDC_VBP_OFFSET;
- value |= info->var.lower_margin;
- dev_dbg(info->device, " * LCDTIM1 = %08lx\n", value);
- lcdc_writel(sinfo, ATMEL_LCDC_TIM1, value);
-
- /* Horizontal timing */
- value = (info->var.right_margin - 1) << ATMEL_LCDC_HFP_OFFSET;
- value |= (info->var.hsync_len - 1) << ATMEL_LCDC_HPW_OFFSET;
- value |= (info->var.left_margin - 1);
- dev_dbg(info->device, " * LCDTIM2 = %08lx\n", value);
- lcdc_writel(sinfo, ATMEL_LCDC_TIM2, value);
-
- /* Horizontal value (aka line size) */
- hozval_linesz = compute_hozval(sinfo, info->var.xres);
-
- /* Display size */
- value = (hozval_linesz - 1) << ATMEL_LCDC_HOZVAL_OFFSET;
- value |= info->var.yres - 1;
- dev_dbg(info->device, " * LCDFRMCFG = %08lx\n", value);
- lcdc_writel(sinfo, ATMEL_LCDC_LCDFRMCFG, value);
-
- /* FIFO Threshold: Use formula from data sheet */
- value = ATMEL_LCDC_FIFO_SIZE - (2 * ATMEL_LCDC_DMA_BURST_LEN + 3);
- lcdc_writel(sinfo, ATMEL_LCDC_FIFO, value);
-
- /* Toggle LCD_MODE every frame */
- lcdc_writel(sinfo, ATMEL_LCDC_MVAL, 0);
-
- /* Disable all interrupts */
- lcdc_writel(sinfo, ATMEL_LCDC_IDR, ~0UL);
- /* Enable FIFO & DMA errors */
- lcdc_writel(sinfo, ATMEL_LCDC_IER, ATMEL_LCDC_UFLWI | ATMEL_LCDC_OWRI | ATMEL_LCDC_MERI);
-
- /* ...wait for DMA engine to become idle... */
- while (lcdc_readl(sinfo, ATMEL_LCDC_DMACON) & ATMEL_LCDC_DMABUSY)
- msleep(10);
-
- atmel_lcdfb_start(sinfo);
-
- dev_dbg(info->device, " * DONE\n");
-
- return 0;
-}
-
-static inline unsigned int chan_to_field(unsigned int chan, const struct fb_bitfield *bf)
-{
- chan &= 0xffff;
- chan >>= 16 - bf->length;
- return chan << bf->offset;
-}
-
-/**
- * atmel_lcdfb_setcolreg - Optional function. Sets a color register.
- * @regno: Which register in the CLUT we are programming
- * @red: The red value which can be up to 16 bits wide
- * @green: The green value which can be up to 16 bits wide
- * @blue: The blue value which can be up to 16 bits wide.
- * @transp: If supported the alpha value which can be up to 16 bits wide.
- * @info: frame buffer info structure
- *
- * Set a single color register. The values supplied have a 16 bit
- * magnitude which needs to be scaled in this function for the hardware.
- * Things to take into consideration are how many color registers, if
- * any, are supported with the current color visual. With truecolor mode
- * no color palettes are supported. Here a pseudo palette is created
- * which we store the value in pseudo_palette in struct fb_info. For
- * pseudocolor mode we have a limited color palette. To deal with this
- * we can program what color is displayed for a particular pixel value.
- * DirectColor is similar in that we can program each color field. If
- * we have a static colormap we don't need to implement this function.
- *
- * Returns negative errno on error, or zero on success. In an
- * ideal world, this would have been the case, but as it turns
- * out, the other drivers return 1 on failure, so that's what
- * we're going to do.
- */
-static int atmel_lcdfb_setcolreg(unsigned int regno, unsigned int red,
- unsigned int green, unsigned int blue,
- unsigned int transp, struct fb_info *info)
-{
- struct atmel_lcdfb_info *sinfo = info->par;
- struct atmel_lcdfb_pdata *pdata = &sinfo->pdata;
- unsigned int val;
- u32 *pal;
- int ret = 1;
-
- if (info->var.grayscale)
- red = green = blue = (19595 * red + 38470 * green
- + 7471 * blue) >> 16;
-
- switch (info->fix.visual) {
- case FB_VISUAL_TRUECOLOR:
- if (regno < 16) {
- pal = info->pseudo_palette;
-
- val = chan_to_field(red, &info->var.red);
- val |= chan_to_field(green, &info->var.green);
- val |= chan_to_field(blue, &info->var.blue);
-
- pal[regno] = val;
- ret = 0;
- }
- break;
-
- case FB_VISUAL_PSEUDOCOLOR:
- if (regno < 256) {
- if (sinfo->config->have_intensity_bit) {
- /* old style I+BGR:555 */
- val = ((red >> 11) & 0x001f);
- val |= ((green >> 6) & 0x03e0);
- val |= ((blue >> 1) & 0x7c00);
-
- /*
- * TODO: intensity bit. Maybe something like
- * ~(red[10] ^ green[10] ^ blue[10]) & 1
- */
- } else {
- /* new style BGR:565 / RGB:565 */
- if (pdata->lcd_wiring_mode == ATMEL_LCDC_WIRING_RGB) {
- val = ((blue >> 11) & 0x001f);
- val |= ((red >> 0) & 0xf800);
- } else {
- val = ((red >> 11) & 0x001f);
- val |= ((blue >> 0) & 0xf800);
- }
-
- val |= ((green >> 5) & 0x07e0);
- }
-
- lcdc_writel(sinfo, ATMEL_LCDC_LUT(regno), val);
- ret = 0;
- }
- break;
-
- case FB_VISUAL_MONO01:
- if (regno < 2) {
- val = (regno == 0) ? 0x00 : 0x1F;
- lcdc_writel(sinfo, ATMEL_LCDC_LUT(regno), val);
- ret = 0;
- }
- break;
-
- }
-
- return ret;
-}
-
-static int atmel_lcdfb_pan_display(struct fb_var_screeninfo *var,
- struct fb_info *info)
-{
- dev_dbg(info->device, "%s\n", __func__);
-
- atmel_lcdfb_update_dma(info, var);
-
- return 0;
-}
-
-static int atmel_lcdfb_blank(int blank_mode, struct fb_info *info)
-{
- struct atmel_lcdfb_info *sinfo = info->par;
-
- switch (blank_mode) {
- case FB_BLANK_UNBLANK:
- case FB_BLANK_NORMAL:
- atmel_lcdfb_start(sinfo);
- break;
- case FB_BLANK_VSYNC_SUSPEND:
- case FB_BLANK_HSYNC_SUSPEND:
- break;
- case FB_BLANK_POWERDOWN:
- atmel_lcdfb_stop(sinfo);
- break;
- default:
- return -EINVAL;
- }
-
- /* let fbcon do a soft blank for us */
- return ((blank_mode == FB_BLANK_NORMAL) ? 1 : 0);
-}
-
-static struct fb_ops atmel_lcdfb_ops = {
- .owner = THIS_MODULE,
- .fb_check_var = atmel_lcdfb_check_var,
- .fb_set_par = atmel_lcdfb_set_par,
- .fb_setcolreg = atmel_lcdfb_setcolreg,
- .fb_blank = atmel_lcdfb_blank,
- .fb_pan_display = atmel_lcdfb_pan_display,
- .fb_fillrect = cfb_fillrect,
- .fb_copyarea = cfb_copyarea,
- .fb_imageblit = cfb_imageblit,
-};
-
-static irqreturn_t atmel_lcdfb_interrupt(int irq, void *dev_id)
-{
- struct fb_info *info = dev_id;
- struct atmel_lcdfb_info *sinfo = info->par;
- u32 status;
-
- status = lcdc_readl(sinfo, ATMEL_LCDC_ISR);
- if (status & ATMEL_LCDC_UFLWI) {
- dev_warn(info->device, "FIFO underflow %#x\n", status);
- /* reset DMA and FIFO to avoid screen shifting */
- schedule_work(&sinfo->task);
- }
- lcdc_writel(sinfo, ATMEL_LCDC_ICR, status);
- return IRQ_HANDLED;
-}
-
-/*
- * LCD controller task (to reset the LCD)
- */
-static void atmel_lcdfb_task(struct work_struct *work)
-{
- struct atmel_lcdfb_info *sinfo =
- container_of(work, struct atmel_lcdfb_info, task);
-
- atmel_lcdfb_reset(sinfo);
-}
-
-static int __init atmel_lcdfb_init_fbinfo(struct atmel_lcdfb_info *sinfo)
-{
- struct fb_info *info = sinfo->info;
- int ret = 0;
-
- info->var.activate |= FB_ACTIVATE_FORCE | FB_ACTIVATE_NOW;
-
- dev_info(info->device,
- "%luKiB frame buffer at %08lx (mapped at %p)\n",
- (unsigned long)info->fix.smem_len / 1024,
- (unsigned long)info->fix.smem_start,
- info->screen_base);
-
- /* Allocate colormap */
- ret = fb_alloc_cmap(&info->cmap, 256, 0);
- if (ret < 0)
- dev_err(info->device, "Alloc color map failed\n");
-
- return ret;
-}
-
-static void atmel_lcdfb_start_clock(struct atmel_lcdfb_info *sinfo)
-{
- clk_prepare_enable(sinfo->bus_clk);
- clk_prepare_enable(sinfo->lcdc_clk);
-}
-
-static void atmel_lcdfb_stop_clock(struct atmel_lcdfb_info *sinfo)
-{
- clk_disable_unprepare(sinfo->bus_clk);
- clk_disable_unprepare(sinfo->lcdc_clk);
-}
-
-#ifdef CONFIG_OF
-static const struct of_device_id atmel_lcdfb_dt_ids[] = {
- { .compatible = "atmel,at91sam9261-lcdc" , .data = &at91sam9261_config, },
- { .compatible = "atmel,at91sam9263-lcdc" , .data = &at91sam9263_config, },
- { .compatible = "atmel,at91sam9g10-lcdc" , .data = &at91sam9g10_config, },
- { .compatible = "atmel,at91sam9g45-lcdc" , .data = &at91sam9g45_config, },
- { .compatible = "atmel,at91sam9g45es-lcdc" , .data = &at91sam9g45es_config, },
- { .compatible = "atmel,at91sam9rl-lcdc" , .data = &at91sam9rl_config, },
- { .compatible = "atmel,at32ap-lcdc" , .data = &at32ap_config, },
- { /* sentinel */ }
-};
-
-MODULE_DEVICE_TABLE(of, atmel_lcdfb_dt_ids);
-
-static const char *atmel_lcdfb_wiring_modes[] = {
- [ATMEL_LCDC_WIRING_BGR] = "BRG",
- [ATMEL_LCDC_WIRING_RGB] = "RGB",
-};
-
-const int atmel_lcdfb_get_of_wiring_modes(struct device_node *np)
-{
- const char *mode;
- int err, i;
-
- err = of_property_read_string(np, "atmel,lcd-wiring-mode", &mode);
- if (err < 0)
- return ATMEL_LCDC_WIRING_BGR;
-
- for (i = 0; i < ARRAY_SIZE(atmel_lcdfb_wiring_modes); i++)
- if (!strcasecmp(mode, atmel_lcdfb_wiring_modes[i]))
- return i;
-
- return -ENODEV;
-}
-
-static void atmel_lcdfb_power_control_gpio(struct atmel_lcdfb_pdata *pdata, int on)
-{
- struct atmel_lcdfb_power_ctrl_gpio *og;
-
- list_for_each_entry(og, &pdata->pwr_gpios, list)
- gpio_set_value(og->gpio, on);
-}
-
-static int atmel_lcdfb_of_init(struct atmel_lcdfb_info *sinfo)
-{
- struct fb_info *info = sinfo->info;
- struct atmel_lcdfb_pdata *pdata = &sinfo->pdata;
- struct fb_var_screeninfo *var = &info->var;
- struct device *dev = &sinfo->pdev->dev;
- struct device_node *np =dev->of_node;
- struct device_node *display_np;
- struct device_node *timings_np;
- struct display_timings *timings;
- enum of_gpio_flags flags;
- struct atmel_lcdfb_power_ctrl_gpio *og;
- bool is_gpio_power = false;
- int ret = -ENOENT;
- int i, gpio;
-
- sinfo->config = (struct atmel_lcdfb_config*)
- of_match_device(atmel_lcdfb_dt_ids, dev)->data;
-
- 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, "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_property_read_u32(display_np, "atmel,guard-time", &pdata->guard_time);
- if (ret < 0) {
- dev_err(dev, "failed to get property atmel,guard-time\n");
- goto put_display_node;
- }
-
- ret = of_property_read_u32(display_np, "atmel,lcdcon2", &pdata->default_lcdcon2);
- if (ret < 0) {
- dev_err(dev, "failed to get property atmel,lcdcon2\n");
- goto put_display_node;
- }
-
- ret = of_property_read_u32(display_np, "atmel,dmacon", &pdata->default_dmacon);
- if (ret < 0) {
- dev_err(dev, "failed to get property bits-per-pixel\n");
- goto put_display_node;
- }
-
- ret = -ENOMEM;
- for (i = 0; i < of_gpio_named_count(display_np, "atmel,power-control-gpio"); i++) {
- gpio = of_get_named_gpio_flags(display_np, "atmel,power-control-gpio",
- i, &flags);
- if (gpio < 0)
- continue;
-
- og = devm_kzalloc(dev, sizeof(*og), GFP_KERNEL);
- if (!og)
- goto put_display_node;
-
- og->gpio = gpio;
- og->active_low = flags & OF_GPIO_ACTIVE_LOW;
- is_gpio_power = true;
- ret = devm_gpio_request(dev, gpio, "lcd-power-control-gpio");
- if (ret) {
- dev_err(dev, "request gpio %d failed\n", gpio);
- goto put_display_node;
- }
-
- ret = gpio_direction_output(gpio, og->active_low);
- if (ret) {
- dev_err(dev, "set direction output gpio %d failed\n", gpio);
- goto put_display_node;
- }
- }
-
- if (is_gpio_power)
- pdata->atmel_lcdfb_power_control = atmel_lcdfb_power_control_gpio;
-
- ret = atmel_lcdfb_get_of_wiring_modes(display_np);
- if (ret < 0) {
- dev_err(dev, "invalid atmel,lcd-wiring-mode\n");
- goto put_display_node;
- }
- pdata->lcd_wiring_mode = ret;
-
- pdata->lcdcon_is_backlight = of_property_read_bool(display_np, "atmel,lcdcon-backlight");
-
- timings = of_get_display_timings(display_np);
- if (!timings) {
- dev_err(dev, "failed to get display timings\n");
- goto put_display_node;
- }
-
- timings_np = of_find_node_by_name(display_np, "display-timings");
- if (!timings_np) {
- dev_err(dev, "failed to find display-timings node\n");
- goto put_display_node;
- }
-
- for (i = 0; i < of_get_child_count(timings_np); i++) {
- struct videomode vm;
- struct fb_videomode fb_vm;
-
- ret = videomode_from_timings(timings, &vm, i);
- if (ret < 0)
- goto put_timings_node;
- ret = fb_videomode_from_videomode(&vm, &fb_vm);
- if (ret < 0)
- goto put_timings_node;
-
- fb_add_videomode(&fb_vm, &info->modelist);
- }
-
- return 0;
-
-put_timings_node:
- of_node_put(timings_np);
-put_display_node:
- of_node_put(display_np);
- return ret;
-}
-#else
-static int atmel_lcdfb_of_init(struct atmel_lcdfb_info *sinfo)
-{
- return 0;
-}
-#endif
-
-static int __init atmel_lcdfb_probe(struct platform_device *pdev)
-{
- struct device *dev = &pdev->dev;
- struct fb_info *info;
- struct atmel_lcdfb_info *sinfo;
- struct atmel_lcdfb_pdata *pdata = NULL;
- struct resource *regs = NULL;
- struct resource *map = NULL;
- struct fb_modelist *modelist;
- int ret;
-
- dev_dbg(dev, "%s BEGIN\n", __func__);
-
- ret = -ENOMEM;
- info = framebuffer_alloc(sizeof(struct atmel_lcdfb_info), dev);
- if (!info) {
- dev_err(dev, "cannot allocate memory\n");
- goto out;
- }
-
- sinfo = info->par;
- sinfo->pdev = pdev;
- sinfo->info = info;
-
- INIT_LIST_HEAD(&info->modelist);
-
- if (pdev->dev.of_node) {
- ret = atmel_lcdfb_of_init(sinfo);
- if (ret)
- goto free_info;
- } else if (dev_get_platdata(dev)) {
- struct fb_monspecs *monspecs;
- int i;
-
- pdata = dev_get_platdata(dev);
- monspecs = pdata->default_monspecs;
- sinfo->pdata = *pdata;
-
- for (i = 0; i < monspecs->modedb_len; i++)
- fb_add_videomode(&monspecs->modedb[i], &info->modelist);
-
- sinfo->config = atmel_lcdfb_get_config(pdev);
-
- info->var.bits_per_pixel = pdata->default_bpp ? pdata->default_bpp : 16;
- memcpy(&info->monspecs, pdata->default_monspecs, sizeof(info->monspecs));
- } else {
- dev_err(dev, "cannot get default configuration\n");
- goto free_info;
- }
-
- if (!sinfo->config)
- goto free_info;
-
- info->flags = ATMEL_LCDFB_FBINFO_DEFAULT;
- info->pseudo_palette = sinfo->pseudo_palette;
- info->fbops = &atmel_lcdfb_ops;
-
- info->fix = atmel_lcdfb_fix;
- strcpy(info->fix.id, sinfo->pdev->name);
-
- /* Enable LCDC Clocks */
- sinfo->bus_clk = clk_get(dev, "hclk");
- if (IS_ERR(sinfo->bus_clk)) {
- ret = PTR_ERR(sinfo->bus_clk);
- goto free_info;
- }
- sinfo->lcdc_clk = clk_get(dev, "lcdc_clk");
- if (IS_ERR(sinfo->lcdc_clk)) {
- ret = PTR_ERR(sinfo->lcdc_clk);
- goto put_bus_clk;
- }
- atmel_lcdfb_start_clock(sinfo);
-
- modelist = list_first_entry(&info->modelist,
- struct fb_modelist, list);
- fb_videomode_to_var(&info->var, &modelist->mode);
-
- atmel_lcdfb_check_var(&info->var, info);
-
- regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!regs) {
- dev_err(dev, "resources unusable\n");
- ret = -ENXIO;
- goto stop_clk;
- }
-
- sinfo->irq_base = platform_get_irq(pdev, 0);
- if (sinfo->irq_base < 0) {
- dev_err(dev, "unable to get irq\n");
- ret = sinfo->irq_base;
- goto stop_clk;
- }
-
- /* Initialize video memory */
- map = platform_get_resource(pdev, IORESOURCE_MEM, 1);
- if (map) {
- /* use a pre-allocated memory buffer */
- info->fix.smem_start = map->start;
- info->fix.smem_len = resource_size(map);
- if (!request_mem_region(info->fix.smem_start,
- info->fix.smem_len, pdev->name)) {
- ret = -EBUSY;
- goto stop_clk;
- }
-
- info->screen_base = ioremap(info->fix.smem_start, info->fix.smem_len);
- if (!info->screen_base) {
- ret = -ENOMEM;
- goto release_intmem;
- }
-
- /*
- * Don't clear the framebuffer -- someone may have set
- * up a splash image.
- */
- } else {
- /* allocate memory buffer */
- ret = atmel_lcdfb_alloc_video_memory(sinfo);
- if (ret < 0) {
- dev_err(dev, "cannot allocate framebuffer: %d\n", ret);
- goto stop_clk;
- }
- }
-
- /* LCDC registers */
- info->fix.mmio_start = regs->start;
- info->fix.mmio_len = resource_size(regs);
-
- if (!request_mem_region(info->fix.mmio_start,
- info->fix.mmio_len, pdev->name)) {
- ret = -EBUSY;
- goto free_fb;
- }
-
- sinfo->mmio = ioremap(info->fix.mmio_start, info->fix.mmio_len);
- if (!sinfo->mmio) {
- dev_err(dev, "cannot map LCDC registers\n");
- ret = -ENOMEM;
- goto release_mem;
- }
-
- /* Initialize PWM for contrast or backlight ("off") */
- init_contrast(sinfo);
-
- /* interrupt */
- ret = request_irq(sinfo->irq_base, atmel_lcdfb_interrupt, 0, pdev->name, info);
- if (ret) {
- dev_err(dev, "request_irq failed: %d\n", ret);
- goto unmap_mmio;
- }
-
- /* Some operations on the LCDC might sleep and
- * require a preemptible task context */
- INIT_WORK(&sinfo->task, atmel_lcdfb_task);
-
- ret = atmel_lcdfb_init_fbinfo(sinfo);
- if (ret < 0) {
- dev_err(dev, "init fbinfo failed: %d\n", ret);
- goto unregister_irqs;
- }
-
- ret = atmel_lcdfb_set_par(info);
- if (ret < 0) {
- dev_err(dev, "set par failed: %d\n", ret);
- goto unregister_irqs;
- }
-
- dev_set_drvdata(dev, info);
-
- /*
- * Tell the world that we're ready to go
- */
- ret = register_framebuffer(info);
- if (ret < 0) {
- dev_err(dev, "failed to register framebuffer device: %d\n", ret);
- goto reset_drvdata;
- }
-
- /* Power up the LCDC screen */
- atmel_lcdfb_power_control(sinfo, 1);
-
- dev_info(dev, "fb%d: Atmel LCDC at 0x%08lx (mapped at %p), irq %d\n",
- info->node, info->fix.mmio_start, sinfo->mmio, sinfo->irq_base);
-
- return 0;
-
-reset_drvdata:
- dev_set_drvdata(dev, NULL);
- fb_dealloc_cmap(&info->cmap);
-unregister_irqs:
- cancel_work_sync(&sinfo->task);
- free_irq(sinfo->irq_base, info);
-unmap_mmio:
- exit_backlight(sinfo);
- iounmap(sinfo->mmio);
-release_mem:
- release_mem_region(info->fix.mmio_start, info->fix.mmio_len);
-free_fb:
- if (map)
- iounmap(info->screen_base);
- else
- atmel_lcdfb_free_video_memory(sinfo);
-
-release_intmem:
- if (map)
- release_mem_region(info->fix.smem_start, info->fix.smem_len);
-stop_clk:
- atmel_lcdfb_stop_clock(sinfo);
- clk_put(sinfo->lcdc_clk);
-put_bus_clk:
- clk_put(sinfo->bus_clk);
-free_info:
- framebuffer_release(info);
-out:
- dev_dbg(dev, "%s FAILED\n", __func__);
- return ret;
-}
-
-static int __exit atmel_lcdfb_remove(struct platform_device *pdev)
-{
- struct device *dev = &pdev->dev;
- struct fb_info *info = dev_get_drvdata(dev);
- struct atmel_lcdfb_info *sinfo;
- struct atmel_lcdfb_pdata *pdata;
-
- if (!info || !info->par)
- return 0;
- sinfo = info->par;
- pdata = &sinfo->pdata;
-
- cancel_work_sync(&sinfo->task);
- exit_backlight(sinfo);
- atmel_lcdfb_power_control(sinfo, 0);
- unregister_framebuffer(info);
- atmel_lcdfb_stop_clock(sinfo);
- clk_put(sinfo->lcdc_clk);
- clk_put(sinfo->bus_clk);
- fb_dealloc_cmap(&info->cmap);
- free_irq(sinfo->irq_base, info);
- iounmap(sinfo->mmio);
- release_mem_region(info->fix.mmio_start, info->fix.mmio_len);
- if (platform_get_resource(pdev, IORESOURCE_MEM, 1)) {
- iounmap(info->screen_base);
- release_mem_region(info->fix.smem_start, info->fix.smem_len);
- } else {
- atmel_lcdfb_free_video_memory(sinfo);
- }
-
- framebuffer_release(info);
-
- return 0;
-}
-
-#ifdef CONFIG_PM
-
-static int atmel_lcdfb_suspend(struct platform_device *pdev, pm_message_t mesg)
-{
- struct fb_info *info = platform_get_drvdata(pdev);
- struct atmel_lcdfb_info *sinfo = info->par;
-
- /*
- * We don't want to handle interrupts while the clock is
- * stopped. It may take forever.
- */
- lcdc_writel(sinfo, ATMEL_LCDC_IDR, ~0UL);
-
- sinfo->saved_lcdcon = lcdc_readl(sinfo, ATMEL_LCDC_CONTRAST_CTR);
- lcdc_writel(sinfo, ATMEL_LCDC_CONTRAST_CTR, 0);
- atmel_lcdfb_power_control(sinfo, 0);
- atmel_lcdfb_stop(sinfo);
- atmel_lcdfb_stop_clock(sinfo);
-
- return 0;
-}
-
-static int atmel_lcdfb_resume(struct platform_device *pdev)
-{
- struct fb_info *info = platform_get_drvdata(pdev);
- struct atmel_lcdfb_info *sinfo = info->par;
-
- atmel_lcdfb_start_clock(sinfo);
- atmel_lcdfb_start(sinfo);
- atmel_lcdfb_power_control(sinfo, 1);
- lcdc_writel(sinfo, ATMEL_LCDC_CONTRAST_CTR, sinfo->saved_lcdcon);
-
- /* Enable FIFO & DMA errors */
- lcdc_writel(sinfo, ATMEL_LCDC_IER, ATMEL_LCDC_UFLWI
- | ATMEL_LCDC_OWRI | ATMEL_LCDC_MERI);
-
- return 0;
-}
-
-#else
-#define atmel_lcdfb_suspend NULL
-#define atmel_lcdfb_resume NULL
-#endif
-
-static struct platform_driver atmel_lcdfb_driver = {
- .remove = __exit_p(atmel_lcdfb_remove),
- .suspend = atmel_lcdfb_suspend,
- .resume = atmel_lcdfb_resume,
- .id_table = atmel_lcdfb_devtypes,
- .driver = {
- .name = "atmel_lcdfb",
- .owner = THIS_MODULE,
- .of_match_table = of_match_ptr(atmel_lcdfb_dt_ids),
- },
-};
-
-module_platform_driver_probe(atmel_lcdfb_driver, atmel_lcdfb_probe);
-
-MODULE_DESCRIPTION("AT91/AT32 LCD Controller framebuffer driver");
-MODULE_AUTHOR("Nicolas Ferre <nicolas.ferre@atmel.com>");
-MODULE_LICENSE("GPL");
git.samba.org / sfrench / cifs-2.6.git / blobdiff