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linux-next/drivers/video/imxfb.c
Sascha Hauer 4d1e4e5a63 imxfb: Fix TFT mode
We read from the PCR reg to determine whether to use TFT mode or not.
This is not possible because it may not have been initialized with
the correct value yet. Select it using fbi->pcr instead.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2009-03-27 14:51:15 +01:00

830 lines
20 KiB
C

/*
* Freescale i.MX Frame Buffer device driver
*
* Copyright (C) 2004 Sascha Hauer, Pengutronix
* Based on acornfb.c Copyright (C) Russell King.
*
* 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.
*
* Please direct your questions and comments on this driver to the following
* email address:
*
* linux-arm-kernel@lists.arm.linux.org.uk
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/interrupt.h>
#include <linux/slab.h>
#include <linux/mm.h>
#include <linux/fb.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/cpufreq.h>
#include <linux/clk.h>
#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
#include <linux/io.h>
#include <linux/math64.h>
#include <mach/imxfb.h>
/*
* Complain if VAR is out of range.
*/
#define DEBUG_VAR 1
#define DRIVER_NAME "imx-fb"
#define LCDC_SSA 0x00
#define LCDC_SIZE 0x04
#define SIZE_XMAX(x) ((((x) >> 4) & 0x3f) << 20)
#ifdef CONFIG_ARCH_MX1
#define SIZE_YMAX(y) ((y) & 0x1ff)
#else
#define SIZE_YMAX(y) ((y) & 0x3ff)
#endif
#define LCDC_VPW 0x08
#define VPW_VPW(x) ((x) & 0x3ff)
#define LCDC_CPOS 0x0C
#define CPOS_CC1 (1<<31)
#define CPOS_CC0 (1<<30)
#define CPOS_OP (1<<28)
#define CPOS_CXP(x) (((x) & 3ff) << 16)
#ifdef CONFIG_ARCH_MX1
#define CPOS_CYP(y) ((y) & 0x1ff)
#else
#define CPOS_CYP(y) ((y) & 0x3ff)
#endif
#define LCDC_LCWHB 0x10
#define LCWHB_BK_EN (1<<31)
#define LCWHB_CW(w) (((w) & 0x1f) << 24)
#define LCWHB_CH(h) (((h) & 0x1f) << 16)
#define LCWHB_BD(x) ((x) & 0xff)
#define LCDC_LCHCC 0x14
#ifdef CONFIG_ARCH_MX1
#define LCHCC_CUR_COL_R(r) (((r) & 0x1f) << 11)
#define LCHCC_CUR_COL_G(g) (((g) & 0x3f) << 5)
#define LCHCC_CUR_COL_B(b) ((b) & 0x1f)
#else
#define LCHCC_CUR_COL_R(r) (((r) & 0x3f) << 12)
#define LCHCC_CUR_COL_G(g) (((g) & 0x3f) << 6)
#define LCHCC_CUR_COL_B(b) ((b) & 0x3f)
#endif
#define LCDC_PCR 0x18
#define LCDC_HCR 0x1C
#define HCR_H_WIDTH(x) (((x) & 0x3f) << 26)
#define HCR_H_WAIT_1(x) (((x) & 0xff) << 8)
#define HCR_H_WAIT_2(x) ((x) & 0xff)
#define LCDC_VCR 0x20
#define VCR_V_WIDTH(x) (((x) & 0x3f) << 26)
#define VCR_V_WAIT_1(x) (((x) & 0xff) << 8)
#define VCR_V_WAIT_2(x) ((x) & 0xff)
#define LCDC_POS 0x24
#define POS_POS(x) ((x) & 1f)
#define LCDC_LSCR1 0x28
/* bit fields in imxfb.h */
#define LCDC_PWMR 0x2C
/* bit fields in imxfb.h */
#define LCDC_DMACR 0x30
/* bit fields in imxfb.h */
#define LCDC_RMCR 0x34
#ifdef CONFIG_ARCH_MX1
#define RMCR_LCDC_EN (1<<1)
#else
#define RMCR_LCDC_EN 0
#endif
#define RMCR_SELF_REF (1<<0)
#define LCDC_LCDICR 0x38
#define LCDICR_INT_SYN (1<<2)
#define LCDICR_INT_CON (1)
#define LCDC_LCDISR 0x40
#define LCDISR_UDR_ERR (1<<3)
#define LCDISR_ERR_RES (1<<2)
#define LCDISR_EOF (1<<1)
#define LCDISR_BOF (1<<0)
/*
* These are the bitfields for each
* display depth that we support.
*/
struct imxfb_rgb {
struct fb_bitfield red;
struct fb_bitfield green;
struct fb_bitfield blue;
struct fb_bitfield transp;
};
struct imxfb_info {
struct platform_device *pdev;
void __iomem *regs;
struct clk *clk;
u_int max_bpp;
u_int max_xres;
u_int max_yres;
/*
* These are the addresses we mapped
* the framebuffer memory region to.
*/
dma_addr_t map_dma;
u_char *map_cpu;
u_int map_size;
u_char *screen_cpu;
dma_addr_t screen_dma;
u_int palette_size;
dma_addr_t dbar1;
dma_addr_t dbar2;
u_int pcr;
u_int pwmr;
u_int lscr1;
u_int dmacr;
u_int cmap_inverse:1,
cmap_static:1,
unused:30;
void (*lcd_power)(int);
void (*backlight_power)(int);
};
#define IMX_NAME "IMX"
/*
* Minimum X and Y resolutions
*/
#define MIN_XRES 64
#define MIN_YRES 64
/* Actually this really is 18bit support, the lowest 2 bits of each colour
* are unused in hardware. We claim to have 24bit support to make software
* like X work, which does not support 18bit.
*/
static struct imxfb_rgb def_rgb_18 = {
.red = {.offset = 16, .length = 8,},
.green = {.offset = 8, .length = 8,},
.blue = {.offset = 0, .length = 8,},
.transp = {.offset = 0, .length = 0,},
};
static struct imxfb_rgb def_rgb_16_tft = {
.red = {.offset = 11, .length = 5,},
.green = {.offset = 5, .length = 6,},
.blue = {.offset = 0, .length = 5,},
.transp = {.offset = 0, .length = 0,},
};
static struct imxfb_rgb def_rgb_16_stn = {
.red = {.offset = 8, .length = 4,},
.green = {.offset = 4, .length = 4,},
.blue = {.offset = 0, .length = 4,},
.transp = {.offset = 0, .length = 0,},
};
static struct imxfb_rgb def_rgb_8 = {
.red = {.offset = 0, .length = 8,},
.green = {.offset = 0, .length = 8,},
.blue = {.offset = 0, .length = 8,},
.transp = {.offset = 0, .length = 0,},
};
static int imxfb_activate_var(struct fb_var_screeninfo *var,
struct fb_info *info);
static inline u_int chan_to_field(u_int chan, struct fb_bitfield *bf)
{
chan &= 0xffff;
chan >>= 16 - bf->length;
return chan << bf->offset;
}
static int imxfb_setpalettereg(u_int regno, u_int red, u_int green, u_int blue,
u_int trans, struct fb_info *info)
{
struct imxfb_info *fbi = info->par;
u_int val, ret = 1;
#define CNVT_TOHW(val,width) ((((val)<<(width))+0x7FFF-(val))>>16)
if (regno < fbi->palette_size) {
val = (CNVT_TOHW(red, 4) << 8) |
(CNVT_TOHW(green,4) << 4) |
CNVT_TOHW(blue, 4);
writel(val, fbi->regs + 0x800 + (regno << 2));
ret = 0;
}
return ret;
}
static int imxfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
u_int trans, struct fb_info *info)
{
struct imxfb_info *fbi = info->par;
unsigned int val;
int ret = 1;
/*
* If inverse mode was selected, invert all the colours
* rather than the register number. The register number
* is what you poke into the framebuffer to produce the
* colour you requested.
*/
if (fbi->cmap_inverse) {
red = 0xffff - red;
green = 0xffff - green;
blue = 0xffff - blue;
}
/*
* If greyscale is true, then we convert the RGB value
* to greyscale no mater what visual we are using.
*/
if (info->var.grayscale)
red = green = blue = (19595 * red + 38470 * green +
7471 * blue) >> 16;
switch (info->fix.visual) {
case FB_VISUAL_TRUECOLOR:
/*
* 12 or 16-bit True Colour. We encode the RGB value
* according to the RGB bitfield information.
*/
if (regno < 16) {
u32 *pal = 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_STATIC_PSEUDOCOLOR:
case FB_VISUAL_PSEUDOCOLOR:
ret = imxfb_setpalettereg(regno, red, green, blue, trans, info);
break;
}
return ret;
}
/*
* imxfb_check_var():
* Round up in the following order: bits_per_pixel, xres,
* yres, xres_virtual, yres_virtual, xoffset, yoffset, grayscale,
* bitfields, horizontal timing, vertical timing.
*/
static int imxfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
{
struct imxfb_info *fbi = info->par;
struct imxfb_rgb *rgb;
if (var->xres < MIN_XRES)
var->xres = MIN_XRES;
if (var->yres < MIN_YRES)
var->yres = MIN_YRES;
if (var->xres > fbi->max_xres)
var->xres = fbi->max_xres;
if (var->yres > fbi->max_yres)
var->yres = fbi->max_yres;
var->xres_virtual = max(var->xres_virtual, var->xres);
var->yres_virtual = max(var->yres_virtual, var->yres);
pr_debug("var->bits_per_pixel=%d\n", var->bits_per_pixel);
switch (var->bits_per_pixel) {
case 32:
rgb = &def_rgb_18;
break;
case 16:
default:
if (fbi->pcr & PCR_TFT)
rgb = &def_rgb_16_tft;
else
rgb = &def_rgb_16_stn;
break;
case 8:
rgb = &def_rgb_8;
break;
}
/*
* Copy the RGB parameters for this display
* from the machine specific parameters.
*/
var->red = rgb->red;
var->green = rgb->green;
var->blue = rgb->blue;
var->transp = rgb->transp;
pr_debug("RGBT length = %d:%d:%d:%d\n",
var->red.length, var->green.length, var->blue.length,
var->transp.length);
pr_debug("RGBT offset = %d:%d:%d:%d\n",
var->red.offset, var->green.offset, var->blue.offset,
var->transp.offset);
return 0;
}
/*
* imxfb_set_par():
* Set the user defined part of the display for the specified console
*/
static int imxfb_set_par(struct fb_info *info)
{
struct imxfb_info *fbi = info->par;
struct fb_var_screeninfo *var = &info->var;
if (var->bits_per_pixel == 16 || var->bits_per_pixel == 32)
info->fix.visual = FB_VISUAL_TRUECOLOR;
else if (!fbi->cmap_static)
info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
else {
/*
* Some people have weird ideas about wanting static
* pseudocolor maps. I suspect their user space
* applications are broken.
*/
info->fix.visual = FB_VISUAL_STATIC_PSEUDOCOLOR;
}
info->fix.line_length = var->xres_virtual * var->bits_per_pixel / 8;
fbi->palette_size = var->bits_per_pixel == 8 ? 256 : 16;
imxfb_activate_var(var, info);
return 0;
}
static void imxfb_enable_controller(struct imxfb_info *fbi)
{
pr_debug("Enabling LCD controller\n");
writel(fbi->screen_dma, fbi->regs + LCDC_SSA);
/* physical screen start address */
writel(VPW_VPW(fbi->max_xres * fbi->max_bpp / 8 / 4),
fbi->regs + LCDC_VPW);
/* panning offset 0 (0 pixel offset) */
writel(0x00000000, fbi->regs + LCDC_POS);
/* disable hardware cursor */
writel(readl(fbi->regs + LCDC_CPOS) & ~(CPOS_CC0 | CPOS_CC1),
fbi->regs + LCDC_CPOS);
writel(RMCR_LCDC_EN, fbi->regs + LCDC_RMCR);
clk_enable(fbi->clk);
if (fbi->backlight_power)
fbi->backlight_power(1);
if (fbi->lcd_power)
fbi->lcd_power(1);
}
static void imxfb_disable_controller(struct imxfb_info *fbi)
{
pr_debug("Disabling LCD controller\n");
if (fbi->backlight_power)
fbi->backlight_power(0);
if (fbi->lcd_power)
fbi->lcd_power(0);
clk_disable(fbi->clk);
writel(0, fbi->regs + LCDC_RMCR);
}
static int imxfb_blank(int blank, struct fb_info *info)
{
struct imxfb_info *fbi = info->par;
pr_debug("imxfb_blank: blank=%d\n", blank);
switch (blank) {
case FB_BLANK_POWERDOWN:
case FB_BLANK_VSYNC_SUSPEND:
case FB_BLANK_HSYNC_SUSPEND:
case FB_BLANK_NORMAL:
imxfb_disable_controller(fbi);
break;
case FB_BLANK_UNBLANK:
imxfb_enable_controller(fbi);
break;
}
return 0;
}
static struct fb_ops imxfb_ops = {
.owner = THIS_MODULE,
.fb_check_var = imxfb_check_var,
.fb_set_par = imxfb_set_par,
.fb_setcolreg = imxfb_setcolreg,
.fb_fillrect = cfb_fillrect,
.fb_copyarea = cfb_copyarea,
.fb_imageblit = cfb_imageblit,
.fb_blank = imxfb_blank,
};
/*
* imxfb_activate_var():
* Configures LCD Controller based on entries in var parameter. Settings are
* only written to the controller if changes were made.
*/
static int imxfb_activate_var(struct fb_var_screeninfo *var, struct fb_info *info)
{
struct imxfb_info *fbi = info->par;
unsigned int pcr, lcd_clk;
unsigned long long tmp;
pr_debug("var: xres=%d hslen=%d lm=%d rm=%d\n",
var->xres, var->hsync_len,
var->left_margin, var->right_margin);
pr_debug("var: yres=%d vslen=%d um=%d bm=%d\n",
var->yres, var->vsync_len,
var->upper_margin, var->lower_margin);
#if DEBUG_VAR
if (var->xres < 16 || var->xres > 1024)
printk(KERN_ERR "%s: invalid xres %d\n",
info->fix.id, var->xres);
if (var->hsync_len < 1 || var->hsync_len > 64)
printk(KERN_ERR "%s: invalid hsync_len %d\n",
info->fix.id, var->hsync_len);
if (var->left_margin > 255)
printk(KERN_ERR "%s: invalid left_margin %d\n",
info->fix.id, var->left_margin);
if (var->right_margin > 255)
printk(KERN_ERR "%s: invalid right_margin %d\n",
info->fix.id, var->right_margin);
if (var->yres < 1 || var->yres > 511)
printk(KERN_ERR "%s: invalid yres %d\n",
info->fix.id, var->yres);
if (var->vsync_len > 100)
printk(KERN_ERR "%s: invalid vsync_len %d\n",
info->fix.id, var->vsync_len);
if (var->upper_margin > 63)
printk(KERN_ERR "%s: invalid upper_margin %d\n",
info->fix.id, var->upper_margin);
if (var->lower_margin > 255)
printk(KERN_ERR "%s: invalid lower_margin %d\n",
info->fix.id, var->lower_margin);
#endif
writel(HCR_H_WIDTH(var->hsync_len - 1) |
HCR_H_WAIT_1(var->right_margin - 1) |
HCR_H_WAIT_2(var->left_margin - 3),
fbi->regs + LCDC_HCR);
writel(VCR_V_WIDTH(var->vsync_len) |
VCR_V_WAIT_1(var->lower_margin) |
VCR_V_WAIT_2(var->upper_margin),
fbi->regs + LCDC_VCR);
writel(SIZE_XMAX(var->xres) | SIZE_YMAX(var->yres),
fbi->regs + LCDC_SIZE);
lcd_clk = clk_get_rate(fbi->clk);
tmp = var->pixclock * (unsigned long long)lcd_clk;
do_div(tmp, 1000000);
if (do_div(tmp, 1000000) > 500000)
tmp++;
pcr = (unsigned int)tmp;
if (--pcr > 0x3F) {
pcr = 0x3F;
printk(KERN_WARNING "Must limit pixel clock to %uHz\n",
lcd_clk / pcr);
}
/* add sync polarities */
pcr |= fbi->pcr & ~0x3F;
writel(pcr, fbi->regs + LCDC_PCR);
writel(fbi->pwmr, fbi->regs + LCDC_PWMR);
writel(fbi->lscr1, fbi->regs + LCDC_LSCR1);
writel(fbi->dmacr, fbi->regs + LCDC_DMACR);
return 0;
}
#ifdef CONFIG_PM
/*
* Power management hooks. Note that we won't be called from IRQ context,
* unlike the blank functions above, so we may sleep.
*/
static int imxfb_suspend(struct platform_device *dev, pm_message_t state)
{
struct imxfb_info *fbi = platform_get_drvdata(dev);
pr_debug("%s\n", __func__);
imxfb_disable_controller(fbi);
return 0;
}
static int imxfb_resume(struct platform_device *dev)
{
struct imxfb_info *fbi = platform_get_drvdata(dev);
pr_debug("%s\n", __func__);
imxfb_enable_controller(fbi);
return 0;
}
#else
#define imxfb_suspend NULL
#define imxfb_resume NULL
#endif
static int __init imxfb_init_fbinfo(struct platform_device *pdev)
{
struct imx_fb_platform_data *pdata = pdev->dev.platform_data;
struct fb_info *info = dev_get_drvdata(&pdev->dev);
struct imxfb_info *fbi = info->par;
pr_debug("%s\n",__func__);
info->pseudo_palette = kmalloc(sizeof(u32) * 16, GFP_KERNEL);
if (!info->pseudo_palette)
return -ENOMEM;
memset(fbi, 0, sizeof(struct imxfb_info));
strlcpy(info->fix.id, IMX_NAME, sizeof(info->fix.id));
info->fix.type = FB_TYPE_PACKED_PIXELS;
info->fix.type_aux = 0;
info->fix.xpanstep = 0;
info->fix.ypanstep = 0;
info->fix.ywrapstep = 0;
info->fix.accel = FB_ACCEL_NONE;
info->var.nonstd = 0;
info->var.activate = FB_ACTIVATE_NOW;
info->var.height = -1;
info->var.width = -1;
info->var.accel_flags = 0;
info->var.vmode = FB_VMODE_NONINTERLACED;
info->fbops = &imxfb_ops;
info->flags = FBINFO_FLAG_DEFAULT |
FBINFO_READS_FAST;
fbi->max_xres = pdata->xres;
info->var.xres = pdata->xres;
info->var.xres_virtual = pdata->xres;
fbi->max_yres = pdata->yres;
info->var.yres = pdata->yres;
info->var.yres_virtual = pdata->yres;
fbi->max_bpp = pdata->bpp;
info->var.bits_per_pixel = pdata->bpp;
info->var.nonstd = pdata->nonstd;
info->var.pixclock = pdata->pixclock;
info->var.hsync_len = pdata->hsync_len;
info->var.left_margin = pdata->left_margin;
info->var.right_margin = pdata->right_margin;
info->var.vsync_len = pdata->vsync_len;
info->var.upper_margin = pdata->upper_margin;
info->var.lower_margin = pdata->lower_margin;
info->var.sync = pdata->sync;
info->var.grayscale = pdata->cmap_greyscale;
fbi->cmap_inverse = pdata->cmap_inverse;
fbi->cmap_static = pdata->cmap_static;
fbi->pcr = pdata->pcr;
fbi->lscr1 = pdata->lscr1;
fbi->dmacr = pdata->dmacr;
fbi->pwmr = pdata->pwmr;
fbi->lcd_power = pdata->lcd_power;
fbi->backlight_power = pdata->backlight_power;
info->fix.smem_len = fbi->max_xres * fbi->max_yres *
fbi->max_bpp / 8;
return 0;
}
static int __init imxfb_probe(struct platform_device *pdev)
{
struct imxfb_info *fbi;
struct fb_info *info;
struct imx_fb_platform_data *pdata;
struct resource *res;
int ret;
printk("i.MX Framebuffer driver\n");
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res)
return -ENODEV;
pdata = pdev->dev.platform_data;
if (!pdata) {
dev_err(&pdev->dev,"No platform_data available\n");
return -ENOMEM;
}
info = framebuffer_alloc(sizeof(struct imxfb_info), &pdev->dev);
if (!info)
return -ENOMEM;
fbi = info->par;
platform_set_drvdata(pdev, info);
ret = imxfb_init_fbinfo(pdev);
if (ret < 0)
goto failed_init;
res = request_mem_region(res->start, resource_size(res),
DRIVER_NAME);
if (!res) {
ret = -EBUSY;
goto failed_req;
}
fbi->clk = clk_get(&pdev->dev, NULL);
if (IS_ERR(fbi->clk)) {
ret = PTR_ERR(fbi->clk);;
dev_err(&pdev->dev, "unable to get clock: %d\n", ret);
goto failed_getclock;
}
fbi->regs = ioremap(res->start, resource_size(res));
if (fbi->regs == NULL) {
printk(KERN_ERR"Cannot map frame buffer registers\n");
goto failed_ioremap;
}
if (!pdata->fixed_screen_cpu) {
fbi->map_size = PAGE_ALIGN(info->fix.smem_len);
fbi->map_cpu = dma_alloc_writecombine(&pdev->dev,
fbi->map_size, &fbi->map_dma, GFP_KERNEL);
if (!fbi->map_cpu) {
dev_err(&pdev->dev, "Failed to allocate video RAM: %d\n", ret);
ret = -ENOMEM;
goto failed_map;
}
info->screen_base = fbi->map_cpu;
fbi->screen_cpu = fbi->map_cpu;
fbi->screen_dma = fbi->map_dma;
info->fix.smem_start = fbi->screen_dma;
} else {
/* Fixed framebuffer mapping enables location of the screen in eSRAM */
fbi->map_cpu = pdata->fixed_screen_cpu;
fbi->map_dma = pdata->fixed_screen_dma;
info->screen_base = fbi->map_cpu;
fbi->screen_cpu = fbi->map_cpu;
fbi->screen_dma = fbi->map_dma;
info->fix.smem_start = fbi->screen_dma;
}
if (pdata->init) {
ret = pdata->init(fbi->pdev);
if (ret)
goto failed_platform_init;
}
/*
* This makes sure that our colour bitfield
* descriptors are correctly initialised.
*/
imxfb_check_var(&info->var, info);
ret = fb_alloc_cmap(&info->cmap, 1 << info->var.bits_per_pixel, 0);
if (ret < 0)
goto failed_cmap;
imxfb_set_par(info);
ret = register_framebuffer(info);
if (ret < 0) {
dev_err(&pdev->dev, "failed to register framebuffer\n");
goto failed_register;
}
imxfb_enable_controller(fbi);
return 0;
failed_register:
fb_dealloc_cmap(&info->cmap);
failed_cmap:
if (pdata->exit)
pdata->exit(fbi->pdev);
failed_platform_init:
if (!pdata->fixed_screen_cpu)
dma_free_writecombine(&pdev->dev,fbi->map_size,fbi->map_cpu,
fbi->map_dma);
failed_map:
clk_put(fbi->clk);
failed_getclock:
iounmap(fbi->regs);
failed_ioremap:
release_mem_region(res->start, res->end - res->start);
failed_req:
kfree(info->pseudo_palette);
failed_init:
platform_set_drvdata(pdev, NULL);
framebuffer_release(info);
return ret;
}
static int __devexit imxfb_remove(struct platform_device *pdev)
{
struct imx_fb_platform_data *pdata;
struct fb_info *info = platform_get_drvdata(pdev);
struct imxfb_info *fbi = info->par;
struct resource *res;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
imxfb_disable_controller(fbi);
unregister_framebuffer(info);
pdata = pdev->dev.platform_data;
if (pdata->exit)
pdata->exit(fbi->pdev);
fb_dealloc_cmap(&info->cmap);
kfree(info->pseudo_palette);
framebuffer_release(info);
iounmap(fbi->regs);
release_mem_region(res->start, res->end - res->start + 1);
clk_disable(fbi->clk);
clk_put(fbi->clk);
platform_set_drvdata(pdev, NULL);
return 0;
}
void imxfb_shutdown(struct platform_device * dev)
{
struct fb_info *info = platform_get_drvdata(dev);
struct imxfb_info *fbi = info->par;
imxfb_disable_controller(fbi);
}
static struct platform_driver imxfb_driver = {
.suspend = imxfb_suspend,
.resume = imxfb_resume,
.remove = __devexit_p(imxfb_remove),
.shutdown = imxfb_shutdown,
.driver = {
.name = DRIVER_NAME,
},
};
int __init imxfb_init(void)
{
return platform_driver_probe(&imxfb_driver, imxfb_probe);
}
static void __exit imxfb_cleanup(void)
{
platform_driver_unregister(&imxfb_driver);
}
module_init(imxfb_init);
module_exit(imxfb_cleanup);
MODULE_DESCRIPTION("Motorola i.MX framebuffer driver");
MODULE_AUTHOR("Sascha Hauer, Pengutronix");
MODULE_LICENSE("GPL");