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linux/drivers/video/tmiofb.c
Andrew Morton a9672c4b86 drivers/video/tmiofb.c: fix uninitialised return value 
drivers/video/tmiofb.c: In function 'tmiofb_resume':
drivers/video/tmiofb.c:977: warning: 'retval' may be used uninitialized in this function

Acked-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-09-23 07:39:57 -07:00

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/*
* Frame Buffer Device for Toshiba Mobile IO(TMIO) controller
*
* Copyright(C) 2005-2006 Chris Humbert
* Copyright(C) 2005 Dirk Opfer
* Copytight(C) 2007,2008 Dmitry Baryshkov
*
* Based on:
* drivers/video/w100fb.c
* code written by Sharp/Lineo for 2.4 kernels
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation;
*
* 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.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/fb.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
/* Why should fb driver call console functions? because acquire_console_sem() */
#include <linux/console.h>
#include <linux/mfd/core.h>
#include <linux/mfd/tmio.h>
#include <linux/uaccess.h>
/*
* accelerator commands
*/
#define TMIOFB_ACC_CSADR(x) (0x00000000 | ((x) & 0x001ffffe))
#define TMIOFB_ACC_CHPIX(x) (0x01000000 | ((x) & 0x000003ff))
#define TMIOFB_ACC_CVPIX(x) (0x02000000 | ((x) & 0x000003ff))
#define TMIOFB_ACC_PSADR(x) (0x03000000 | ((x) & 0x00fffffe))
#define TMIOFB_ACC_PHPIX(x) (0x04000000 | ((x) & 0x000003ff))
#define TMIOFB_ACC_PVPIX(x) (0x05000000 | ((x) & 0x000003ff))
#define TMIOFB_ACC_PHOFS(x) (0x06000000 | ((x) & 0x000003ff))
#define TMIOFB_ACC_PVOFS(x) (0x07000000 | ((x) & 0x000003ff))
#define TMIOFB_ACC_POADR(x) (0x08000000 | ((x) & 0x00fffffe))
#define TMIOFB_ACC_RSTR(x) (0x09000000 | ((x) & 0x000000ff))
#define TMIOFB_ACC_TCLOR(x) (0x0A000000 | ((x) & 0x0000ffff))
#define TMIOFB_ACC_FILL(x) (0x0B000000 | ((x) & 0x0000ffff))
#define TMIOFB_ACC_DSADR(x) (0x0C000000 | ((x) & 0x00fffffe))
#define TMIOFB_ACC_SSADR(x) (0x0D000000 | ((x) & 0x00fffffe))
#define TMIOFB_ACC_DHPIX(x) (0x0E000000 | ((x) & 0x000003ff))
#define TMIOFB_ACC_DVPIX(x) (0x0F000000 | ((x) & 0x000003ff))
#define TMIOFB_ACC_SHPIX(x) (0x10000000 | ((x) & 0x000003ff))
#define TMIOFB_ACC_SVPIX(x) (0x11000000 | ((x) & 0x000003ff))
#define TMIOFB_ACC_LBINI(x) (0x12000000 | ((x) & 0x0000ffff))
#define TMIOFB_ACC_LBK2(x) (0x13000000 | ((x) & 0x0000ffff))
#define TMIOFB_ACC_SHBINI(x) (0x14000000 | ((x) & 0x0000ffff))
#define TMIOFB_ACC_SHBK2(x) (0x15000000 | ((x) & 0x0000ffff))
#define TMIOFB_ACC_SVBINI(x) (0x16000000 | ((x) & 0x0000ffff))
#define TMIOFB_ACC_SVBK2(x) (0x17000000 | ((x) & 0x0000ffff))
#define TMIOFB_ACC_CMGO 0x20000000
#define TMIOFB_ACC_CMGO_CEND 0x00000001
#define TMIOFB_ACC_CMGO_INT 0x00000002
#define TMIOFB_ACC_CMGO_CMOD 0x00000010
#define TMIOFB_ACC_CMGO_CDVRV 0x00000020
#define TMIOFB_ACC_CMGO_CDHRV 0x00000040
#define TMIOFB_ACC_CMGO_RUND 0x00008000
#define TMIOFB_ACC_SCGO 0x21000000
#define TMIOFB_ACC_SCGO_CEND 0x00000001
#define TMIOFB_ACC_SCGO_INT 0x00000002
#define TMIOFB_ACC_SCGO_ROP3 0x00000004
#define TMIOFB_ACC_SCGO_TRNS 0x00000008
#define TMIOFB_ACC_SCGO_DVRV 0x00000010
#define TMIOFB_ACC_SCGO_DHRV 0x00000020
#define TMIOFB_ACC_SCGO_SVRV 0x00000040
#define TMIOFB_ACC_SCGO_SHRV 0x00000080
#define TMIOFB_ACC_SCGO_DSTXY 0x00008000
#define TMIOFB_ACC_SBGO 0x22000000
#define TMIOFB_ACC_SBGO_CEND 0x00000001
#define TMIOFB_ACC_SBGO_INT 0x00000002
#define TMIOFB_ACC_SBGO_DVRV 0x00000010
#define TMIOFB_ACC_SBGO_DHRV 0x00000020
#define TMIOFB_ACC_SBGO_SVRV 0x00000040
#define TMIOFB_ACC_SBGO_SHRV 0x00000080
#define TMIOFB_ACC_SBGO_SBMD 0x00000100
#define TMIOFB_ACC_FLGO 0x23000000
#define TMIOFB_ACC_FLGO_CEND 0x00000001
#define TMIOFB_ACC_FLGO_INT 0x00000002
#define TMIOFB_ACC_FLGO_ROP3 0x00000004
#define TMIOFB_ACC_LDGO 0x24000000
#define TMIOFB_ACC_LDGO_CEND 0x00000001
#define TMIOFB_ACC_LDGO_INT 0x00000002
#define TMIOFB_ACC_LDGO_ROP3 0x00000004
#define TMIOFB_ACC_LDGO_ENDPX 0x00000008
#define TMIOFB_ACC_LDGO_LVRV 0x00000010
#define TMIOFB_ACC_LDGO_LHRV 0x00000020
#define TMIOFB_ACC_LDGO_LDMOD 0x00000040
/* a FIFO is always allocated, even if acceleration is not used */
#define TMIOFB_FIFO_SIZE 512
/*
* LCD Host Controller Configuration Register
*
* This iomem area supports only 16-bit IO.
*/
#define CCR_CMD 0x04 /* Command */
#define CCR_REVID 0x08 /* Revision ID */
#define CCR_BASEL 0x10 /* LCD Control Reg Base Addr Low */
#define CCR_BASEH 0x12 /* LCD Control Reg Base Addr High */
#define CCR_UGCC 0x40 /* Unified Gated Clock Control */
#define CCR_GCC 0x42 /* Gated Clock Control */
#define CCR_USC 0x50 /* Unified Software Clear */
#define CCR_VRAMRTC 0x60 /* VRAM Timing Control */
/* 0x61 VRAM Refresh Control */
#define CCR_VRAMSAC 0x62 /* VRAM Access Control */
/* 0x63 VRAM Status */
#define CCR_VRAMBC 0x64 /* VRAM Block Control */
/*
* LCD Control Register
*
* This iomem area supports only 16-bit IO.
*/
#define LCR_UIS 0x000 /* Unified Interrupt Status */
#define LCR_VHPN 0x008 /* VRAM Horizontal Pixel Number */
#define LCR_CFSAL 0x00a /* Command FIFO Start Address Low */
#define LCR_CFSAH 0x00c /* Command FIFO Start Address High */
#define LCR_CFS 0x00e /* Command FIFO Size */
#define LCR_CFWS 0x010 /* Command FIFO Writeable Size */
#define LCR_BBIE 0x012 /* BitBLT Interrupt Enable */
#define LCR_BBISC 0x014 /* BitBLT Interrupt Status and Clear */
#define LCR_CCS 0x016 /* Command Count Status */
#define LCR_BBES 0x018 /* BitBLT Execution Status */
#define LCR_CMDL 0x01c /* Command Low */
#define LCR_CMDH 0x01e /* Command High */
#define LCR_CFC 0x022 /* Command FIFO Clear */
#define LCR_CCIFC 0x024 /* CMOS Camera IF Control */
#define LCR_HWT 0x026 /* Hardware Test */
#define LCR_LCDCCRC 0x100 /* LCDC Clock and Reset Control */
#define LCR_LCDCC 0x102 /* LCDC Control */
#define LCR_LCDCOPC 0x104 /* LCDC Output Pin Control */
#define LCR_LCDIS 0x108 /* LCD Interrupt Status */
#define LCR_LCDIM 0x10a /* LCD Interrupt Mask */
#define LCR_LCDIE 0x10c /* LCD Interrupt Enable */
#define LCR_GDSAL 0x122 /* Graphics Display Start Address Low */
#define LCR_GDSAH 0x124 /* Graphics Display Start Address High */
#define LCR_VHPCL 0x12a /* VRAM Horizontal Pixel Count Low */
#define LCR_VHPCH 0x12c /* VRAM Horizontal Pixel Count High */
#define LCR_GM 0x12e /* Graphic Mode(VRAM access enable) */
#define LCR_HT 0x140 /* Horizontal Total */
#define LCR_HDS 0x142 /* Horizontal Display Start */
#define LCR_HSS 0x144 /* H-Sync Start */
#define LCR_HSE 0x146 /* H-Sync End */
#define LCR_HNP 0x14c /* Horizontal Number of Pixels */
#define LCR_VT 0x150 /* Vertical Total */
#define LCR_VDS 0x152 /* Vertical Display Start */
#define LCR_VSS 0x154 /* V-Sync Start */
#define LCR_VSE 0x156 /* V-Sync End */
#define LCR_CDLN 0x160 /* Current Display Line Number */
#define LCR_ILN 0x162 /* Interrupt Line Number */
#define LCR_SP 0x164 /* Sync Polarity */
#define LCR_MISC 0x166 /* MISC(RGB565 mode) */
#define LCR_VIHSS 0x16a /* Video Interface H-Sync Start */
#define LCR_VIVS 0x16c /* Video Interface Vertical Start */
#define LCR_VIVE 0x16e /* Video Interface Vertical End */
#define LCR_VIVSS 0x170 /* Video Interface V-Sync Start */
#define LCR_VCCIS 0x17e /* Video / CMOS Camera Interface Select */
#define LCR_VIDWSAL 0x180 /* VI Data Write Start Address Low */
#define LCR_VIDWSAH 0x182 /* VI Data Write Start Address High */
#define LCR_VIDRSAL 0x184 /* VI Data Read Start Address Low */
#define LCR_VIDRSAH 0x186 /* VI Data Read Start Address High */
#define LCR_VIPDDST 0x188 /* VI Picture Data Display Start Timing */
#define LCR_VIPDDET 0x186 /* VI Picture Data Display End Timing */
#define LCR_VIE 0x18c /* Video Interface Enable */
#define LCR_VCS 0x18e /* Video/Camera Select */
#define LCR_VPHWC 0x194 /* Video Picture Horizontal Wait Count */
#define LCR_VPHS 0x196 /* Video Picture Horizontal Size */
#define LCR_VPVWC 0x198 /* Video Picture Vertical Wait Count */
#define LCR_VPVS 0x19a /* Video Picture Vertical Size */
#define LCR_PLHPIX 0x1a0 /* PLHPIX */
#define LCR_XS 0x1a2 /* XStart */
#define LCR_XCKHW 0x1a4 /* XCK High Width */
#define LCR_STHS 0x1a8 /* STH Start */
#define LCR_VT2 0x1aa /* Vertical Total */
#define LCR_YCKSW 0x1ac /* YCK Start Wait */
#define LCR_YSTS 0x1ae /* YST Start */
#define LCR_PPOLS 0x1b0 /* #PPOL Start */
#define LCR_PRECW 0x1b2 /* PREC Width */
#define LCR_VCLKHW 0x1b4 /* VCLK High Width */
#define LCR_OC 0x1b6 /* Output Control */
static char *mode_option __devinitdata;
struct tmiofb_par {
u32 pseudo_palette[16];
#ifdef CONFIG_FB_TMIO_ACCELL
wait_queue_head_t wait_acc;
bool use_polling;
#endif
void __iomem *ccr;
void __iomem *lcr;
};
/*--------------------------------------------------------------------------*/
/*
* reasons for an interrupt:
* uis bbisc lcdis
* 0100 0001 accelerator command completed
* 2000 0001 vsync start
* 2000 0002 display start
* 2000 0004 line number match(0x1ff mask???)
*/
static irqreturn_t tmiofb_irq(int irq, void *__info)
{
struct fb_info *info = __info;
struct tmiofb_par *par = info->par;
unsigned int bbisc = tmio_ioread16(par->lcr + LCR_BBISC);
tmio_iowrite16(bbisc, par->lcr + LCR_BBISC);
#ifdef CONFIG_FB_TMIO_ACCELL
/*
* We were in polling mode and now we got correct irq.
* Switch back to IRQ-based sync of command FIFO
*/
if (unlikely(par->use_polling && irq != -1)) {
printk(KERN_INFO "tmiofb: switching to waitq\n");
par->use_polling = false;
}
if (bbisc & 1)
wake_up(&par->wait_acc);
#endif
return IRQ_HANDLED;
}
/*--------------------------------------------------------------------------*/
/*
* Turns off the LCD controller and LCD host controller.
*/
static int tmiofb_hw_stop(struct platform_device *dev)
{
struct mfd_cell *cell = dev->dev.platform_data;
struct tmio_fb_data *data = cell->driver_data;
struct fb_info *info = platform_get_drvdata(dev);
struct tmiofb_par *par = info->par;
tmio_iowrite16(0, par->ccr + CCR_UGCC);
tmio_iowrite16(0, par->lcr + LCR_GM);
data->lcd_set_power(dev, 0);
tmio_iowrite16(0x0010, par->lcr + LCR_LCDCCRC);
return 0;
}
/*
* Initializes the LCD host controller.
*/
static int tmiofb_hw_init(struct platform_device *dev)
{
struct mfd_cell *cell = dev->dev.platform_data;
struct fb_info *info = platform_get_drvdata(dev);
struct tmiofb_par *par = info->par;
const struct resource *nlcr = &cell->resources[0];
const struct resource *vram = &cell->resources[2];
unsigned long base;
if (nlcr == NULL || vram == NULL)
return -EINVAL;
base = nlcr->start;
tmio_iowrite16(0x003a, par->ccr + CCR_UGCC);
tmio_iowrite16(0x003a, par->ccr + CCR_GCC);
tmio_iowrite16(0x3f00, par->ccr + CCR_USC);
msleep(2); /* wait for device to settle */
tmio_iowrite16(0x0000, par->ccr + CCR_USC);
tmio_iowrite16(base >> 16, par->ccr + CCR_BASEH);
tmio_iowrite16(base, par->ccr + CCR_BASEL);
tmio_iowrite16(0x0002, par->ccr + CCR_CMD); /* base address enable */
tmio_iowrite16(0x40a8, par->ccr + CCR_VRAMRTC); /* VRAMRC, VRAMTC */
tmio_iowrite16(0x0018, par->ccr + CCR_VRAMSAC); /* VRAMSTS, VRAMAC */
tmio_iowrite16(0x0002, par->ccr + CCR_VRAMBC);
msleep(2); /* wait for device to settle */
tmio_iowrite16(0x000b, par->ccr + CCR_VRAMBC);
base = vram->start + info->screen_size;
tmio_iowrite16(base >> 16, par->lcr + LCR_CFSAH);
tmio_iowrite16(base, par->lcr + LCR_CFSAL);
tmio_iowrite16(TMIOFB_FIFO_SIZE - 1, par->lcr + LCR_CFS);
tmio_iowrite16(1, par->lcr + LCR_CFC);
tmio_iowrite16(1, par->lcr + LCR_BBIE);
tmio_iowrite16(0, par->lcr + LCR_CFWS);
return 0;
}
/*
* Sets the LCD controller's output resolution and pixel clock
*/
static void tmiofb_hw_mode(struct platform_device *dev)
{
struct mfd_cell *cell = dev->dev.platform_data;
struct tmio_fb_data *data = cell->driver_data;
struct fb_info *info = platform_get_drvdata(dev);
struct fb_videomode *mode = info->mode;
struct tmiofb_par *par = info->par;
unsigned int i;
tmio_iowrite16(0, par->lcr + LCR_GM);
data->lcd_set_power(dev, 0);
tmio_iowrite16(0x0010, par->lcr + LCR_LCDCCRC);
data->lcd_mode(dev, mode);
data->lcd_set_power(dev, 1);
tmio_iowrite16(info->fix.line_length, par->lcr + LCR_VHPN);
tmio_iowrite16(0, par->lcr + LCR_GDSAH);
tmio_iowrite16(0, par->lcr + LCR_GDSAL);
tmio_iowrite16(info->fix.line_length >> 16, par->lcr + LCR_VHPCH);
tmio_iowrite16(info->fix.line_length, par->lcr + LCR_VHPCL);
tmio_iowrite16(i = 0, par->lcr + LCR_HSS);
tmio_iowrite16(i += mode->hsync_len, par->lcr + LCR_HSE);
tmio_iowrite16(i += mode->left_margin, par->lcr + LCR_HDS);
tmio_iowrite16(i += mode->xres + mode->right_margin, par->lcr + LCR_HT);
tmio_iowrite16(mode->xres, par->lcr + LCR_HNP);
tmio_iowrite16(i = 0, par->lcr + LCR_VSS);
tmio_iowrite16(i += mode->vsync_len, par->lcr + LCR_VSE);
tmio_iowrite16(i += mode->upper_margin, par->lcr + LCR_VDS);
tmio_iowrite16(i += mode->yres, par->lcr + LCR_ILN);
tmio_iowrite16(i += mode->lower_margin, par->lcr + LCR_VT);
tmio_iowrite16(3, par->lcr + LCR_MISC); /* RGB565 mode */
tmio_iowrite16(1, par->lcr + LCR_GM); /* VRAM enable */
tmio_iowrite16(0x4007, par->lcr + LCR_LCDCC);
tmio_iowrite16(3, par->lcr + LCR_SP); /* sync polarity */
tmio_iowrite16(0x0010, par->lcr + LCR_LCDCCRC);
msleep(5); /* wait for device to settle */
tmio_iowrite16(0x0014, par->lcr + LCR_LCDCCRC); /* STOP_CKP */
msleep(5); /* wait for device to settle */
tmio_iowrite16(0x0015, par->lcr + LCR_LCDCCRC); /* STOP_CKP|SOFT_RESET*/
tmio_iowrite16(0xfffa, par->lcr + LCR_VCS);
}
/*--------------------------------------------------------------------------*/
#ifdef CONFIG_FB_TMIO_ACCELL
static int __must_check
tmiofb_acc_wait(struct fb_info *info, unsigned int ccs)
{
struct tmiofb_par *par = info->par;
/*
* This code can be called whith interrupts disabled.
* So instead of relaying on irq to trigger the event,
* poll the state till the necessary command is executed.
*/
if (irqs_disabled() || par->use_polling) {
int i = 0;
while (tmio_ioread16(par->lcr + LCR_CCS) > ccs) {
udelay(1);
i++;
if (i > 10000) {
pr_err("tmiofb: timeout waiting for %d\n",
ccs);
return -ETIMEDOUT;
}
tmiofb_irq(-1, info);
}
} else {
if (!wait_event_interruptible_timeout(par->wait_acc,
tmio_ioread16(par->lcr + LCR_CCS) <= ccs,
1000)) {
pr_err("tmiofb: timeout waiting for %d\n", ccs);
return -ETIMEDOUT;
}
}
return 0;
}
/*
* Writes an accelerator command to the accelerator's FIFO.
*/
static int
tmiofb_acc_write(struct fb_info *info, const u32 *cmd, unsigned int count)
{
struct tmiofb_par *par = info->par;
int ret;
ret = tmiofb_acc_wait(info, TMIOFB_FIFO_SIZE - count);
if (ret)
return ret;
for (; count; count--, cmd++) {
tmio_iowrite16(*cmd >> 16, par->lcr + LCR_CMDH);
tmio_iowrite16(*cmd, par->lcr + LCR_CMDL);
}
return ret;
}
/*
* Wait for the accelerator to finish its operations before writing
* to the framebuffer for consistent display output.
*/
static int tmiofb_sync(struct fb_info *fbi)
{
struct tmiofb_par *par = fbi->par;
int ret;
int i = 0;
ret = tmiofb_acc_wait(fbi, 0);
while (tmio_ioread16(par->lcr + LCR_BBES) & 2) { /* blit active */
udelay(1);
i++ ;
if (i > 10000) {
printk(KERN_ERR "timeout waiting for blit to end!\n");
return -ETIMEDOUT;
}
}
return ret;
}
static void
tmiofb_fillrect(struct fb_info *fbi, const struct fb_fillrect *rect)
{
const u32 cmd[] = {
TMIOFB_ACC_DSADR((rect->dy * fbi->mode->xres + rect->dx) * 2),
TMIOFB_ACC_DHPIX(rect->width - 1),
TMIOFB_ACC_DVPIX(rect->height - 1),
TMIOFB_ACC_FILL(rect->color),
TMIOFB_ACC_FLGO,
};
if (fbi->state != FBINFO_STATE_RUNNING ||
fbi->flags & FBINFO_HWACCEL_DISABLED) {
cfb_fillrect(fbi, rect);
return;
}
tmiofb_acc_write(fbi, cmd, ARRAY_SIZE(cmd));
}
static void
tmiofb_copyarea(struct fb_info *fbi, const struct fb_copyarea *area)
{
const u32 cmd[] = {
TMIOFB_ACC_DSADR((area->dy * fbi->mode->xres + area->dx) * 2),
TMIOFB_ACC_DHPIX(area->width - 1),
TMIOFB_ACC_DVPIX(area->height - 1),
TMIOFB_ACC_SSADR((area->sy * fbi->mode->xres + area->sx) * 2),
TMIOFB_ACC_SCGO,
};
if (fbi->state != FBINFO_STATE_RUNNING ||
fbi->flags & FBINFO_HWACCEL_DISABLED) {
cfb_copyarea(fbi, area);
return;
}
tmiofb_acc_write(fbi, cmd, ARRAY_SIZE(cmd));
}
#endif
static void tmiofb_clearscreen(struct fb_info *info)
{
const struct fb_fillrect rect = {
.dx = 0,
.dy = 0,
.width = info->mode->xres,
.height = info->mode->yres,
.color = 0,
.rop = ROP_COPY,
};
info->fbops->fb_fillrect(info, &rect);
}
static int tmiofb_vblank(struct fb_info *fbi, struct fb_vblank *vblank)
{
struct tmiofb_par *par = fbi->par;
struct fb_videomode *mode = fbi->mode;
unsigned int vcount = tmio_ioread16(par->lcr + LCR_CDLN);
unsigned int vds = mode->vsync_len + mode->upper_margin;
vblank->vcount = vcount;
vblank->flags = FB_VBLANK_HAVE_VBLANK | FB_VBLANK_HAVE_VCOUNT
| FB_VBLANK_HAVE_VSYNC;
if (vcount < mode->vsync_len)
vblank->flags |= FB_VBLANK_VSYNCING;
if (vcount < vds || vcount > vds + mode->yres)
vblank->flags |= FB_VBLANK_VBLANKING;
return 0;
}
static int tmiofb_ioctl(struct fb_info *fbi,
unsigned int cmd, unsigned long arg)
{
switch (cmd) {
case FBIOGET_VBLANK: {
struct fb_vblank vblank = {0};
void __user *argp = (void __user *) arg;
tmiofb_vblank(fbi, &vblank);
if (copy_to_user(argp, &vblank, sizeof vblank))
return -EFAULT;
return 0;
}
#ifdef CONFIG_FB_TMIO_ACCELL
case FBIO_TMIO_ACC_SYNC:
tmiofb_sync(fbi);
return 0;
case FBIO_TMIO_ACC_WRITE: {
u32 __user *argp = (void __user *) arg;
u32 len;
u32 acc[16];
if (get_user(len, argp))
return -EFAULT;
if (len > ARRAY_SIZE(acc))
return -EINVAL;
if (copy_from_user(acc, argp + 1, sizeof(u32) * len))
return -EFAULT;
return tmiofb_acc_write(fbi, acc, len);
}
#endif
}
return -ENOTTY;
}
/*--------------------------------------------------------------------------*/
/* Select the smallest mode that allows the desired resolution to be
* displayed. If desired, the x and y parameters can be rounded up to
* match the selected mode.
*/
static struct fb_videomode *
tmiofb_find_mode(struct fb_info *info, struct fb_var_screeninfo *var)
{
struct mfd_cell *cell =
info->device->platform_data;
struct tmio_fb_data *data = cell->driver_data;
struct fb_videomode *best = NULL;
int i;
for (i = 0; i < data->num_modes; i++) {
struct fb_videomode *mode = data->modes + i;
if (mode->xres >= var->xres && mode->yres >= var->yres
&& (!best || (mode->xres < best->xres
&& mode->yres < best->yres)))
best = mode;
}
return best;
}
static int tmiofb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
{
struct fb_videomode *mode;
struct mfd_cell *cell =
info->device->platform_data;
struct tmio_fb_data *data = cell->driver_data;
mode = tmiofb_find_mode(info, var);
if (!mode || var->bits_per_pixel > 16)
return -EINVAL;
fb_videomode_to_var(var, mode);
var->xres_virtual = mode->xres;
var->yres_virtual = info->screen_size / (mode->xres * 2);
if (var->yres_virtual < var->yres)
return -EINVAL;
var->xoffset = 0;
var->yoffset = 0;
var->bits_per_pixel = 16;
var->grayscale = 0;
var->red.offset = 11;
var->red.length = 5;
var->green.offset = 5;
var->green.length = 6;
var->blue.offset = 0;
var->blue.length = 5;
var->transp.offset = 0;
var->transp.length = 0;
var->nonstd = 0;
var->height = data->height; /* mm */
var->width = data->width; /* mm */
var->rotate = 0;
return 0;
}
static int tmiofb_set_par(struct fb_info *info)
{
struct fb_var_screeninfo *var = &info->var;
struct fb_videomode *mode;
mode = tmiofb_find_mode(info, var);
if (!mode)
return -EINVAL;
info->mode = mode;
info->fix.line_length = info->mode->xres *
var->bits_per_pixel / 8;
tmiofb_hw_mode(to_platform_device(info->device));
tmiofb_clearscreen(info);
return 0;
}
static int tmiofb_setcolreg(unsigned regno, unsigned red, unsigned green,
unsigned blue, unsigned transp,
struct fb_info *info)
{
struct tmiofb_par *par = info->par;
if (regno < ARRAY_SIZE(par->pseudo_palette)) {
par->pseudo_palette[regno] =
((red & 0xf800)) |
((green & 0xfc00) >> 5) |
((blue & 0xf800) >> 11);
return 0;
}
return -EINVAL;
}
static int tmiofb_blank(int blank, struct fb_info *info)
{
/*
* everything is done in lcd/bl drivers.
* this is purely to make sysfs happy and work.
*/
return 0;
}
static struct fb_ops tmiofb_ops = {
.owner = THIS_MODULE,
.fb_ioctl = tmiofb_ioctl,
.fb_check_var = tmiofb_check_var,
.fb_set_par = tmiofb_set_par,
.fb_setcolreg = tmiofb_setcolreg,
.fb_blank = tmiofb_blank,
.fb_imageblit = cfb_imageblit,
#ifdef CONFIG_FB_TMIO_ACCELL
.fb_sync = tmiofb_sync,
.fb_fillrect = tmiofb_fillrect,
.fb_copyarea = tmiofb_copyarea,
#else
.fb_fillrect = cfb_fillrect,
.fb_copyarea = cfb_copyarea,
#endif
};
/*--------------------------------------------------------------------------*/
static int __devinit tmiofb_probe(struct platform_device *dev)
{
struct mfd_cell *cell = dev->dev.platform_data;
struct tmio_fb_data *data = cell->driver_data;
struct resource *ccr = platform_get_resource(dev, IORESOURCE_MEM, 1);
struct resource *lcr = platform_get_resource(dev, IORESOURCE_MEM, 0);
struct resource *vram = platform_get_resource(dev, IORESOURCE_MEM, 2);
int irq = platform_get_irq(dev, 0);
struct fb_info *info;
struct tmiofb_par *par;
int retval;
/*
* This is the only way ATM to disable the fb
*/
if (data == NULL) {
dev_err(&dev->dev, "NULL platform data!\n");
return -EINVAL;
}
info = framebuffer_alloc(sizeof(struct tmiofb_par), &dev->dev);
if (!info)
return -ENOMEM;
par = info->par;
#ifdef CONFIG_FB_TMIO_ACCELL
init_waitqueue_head(&par->wait_acc);
par->use_polling = true;
info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_COPYAREA
| FBINFO_HWACCEL_FILLRECT;
#else
info->flags = FBINFO_DEFAULT;
#endif
info->fbops = &tmiofb_ops;
strcpy(info->fix.id, "tmio-fb");
info->fix.smem_start = vram->start;
info->fix.smem_len = resource_size(vram);
info->fix.type = FB_TYPE_PACKED_PIXELS;
info->fix.visual = FB_VISUAL_TRUECOLOR;
info->fix.mmio_start = lcr->start;
info->fix.mmio_len = resource_size(lcr);
info->fix.accel = FB_ACCEL_NONE;
info->screen_size = info->fix.smem_len - (4 * TMIOFB_FIFO_SIZE);
info->pseudo_palette = par->pseudo_palette;
par->ccr = ioremap(ccr->start, resource_size(ccr));
if (!par->ccr) {
retval = -ENOMEM;
goto err_ioremap_ccr;
}
par->lcr = ioremap(info->fix.mmio_start, info->fix.mmio_len);
if (!par->lcr) {
retval = -ENOMEM;
goto err_ioremap_lcr;
}
info->screen_base = ioremap(info->fix.smem_start, info->fix.smem_len);
if (!info->screen_base) {
retval = -ENOMEM;
goto err_ioremap_vram;
}
retval = request_irq(irq, &tmiofb_irq, IRQF_DISABLED,
dev_name(&dev->dev), info);
if (retval)
goto err_request_irq;
platform_set_drvdata(dev, info);
retval = fb_find_mode(&info->var, info, mode_option,
data->modes, data->num_modes,
data->modes, 16);
if (!retval) {
retval = -EINVAL;
goto err_find_mode;
}
if (cell->enable) {
retval = cell->enable(dev);
if (retval)
goto err_enable;
}
retval = tmiofb_hw_init(dev);
if (retval)
goto err_hw_init;
fb_videomode_to_modelist(data->modes, data->num_modes,
&info->modelist);
retval = register_framebuffer(info);
if (retval < 0)
goto err_register_framebuffer;
printk(KERN_INFO "fb%d: %s frame buffer device\n",
info->node, info->fix.id);
return 0;
err_register_framebuffer:
/*err_set_par:*/
tmiofb_hw_stop(dev);
err_hw_init:
if (cell->disable)
cell->disable(dev);
err_enable:
err_find_mode:
platform_set_drvdata(dev, NULL);
free_irq(irq, info);
err_request_irq:
iounmap(info->screen_base);
err_ioremap_vram:
iounmap(par->lcr);
err_ioremap_lcr:
iounmap(par->ccr);
err_ioremap_ccr:
framebuffer_release(info);
return retval;
}
static int __devexit tmiofb_remove(struct platform_device *dev)
{
struct mfd_cell *cell = dev->dev.platform_data;
struct fb_info *info = platform_get_drvdata(dev);
int irq = platform_get_irq(dev, 0);
struct tmiofb_par *par;
if (info) {
par = info->par;
unregister_framebuffer(info);
tmiofb_hw_stop(dev);
if (cell->disable)
cell->disable(dev);
platform_set_drvdata(dev, NULL);
free_irq(irq, info);
iounmap(info->screen_base);
iounmap(par->lcr);
iounmap(par->ccr);
framebuffer_release(info);
}
return 0;
}
#ifdef DEBUG
static void tmiofb_dump_regs(struct platform_device *dev)
{
struct fb_info *info = platform_get_drvdata(dev);
struct tmiofb_par *par = info->par;
printk(KERN_DEBUG "lhccr:\n");
#define CCR_PR(n) printk(KERN_DEBUG "\t" #n " = \t%04x\n",\
tmio_ioread16(par->ccr + CCR_ ## n));
CCR_PR(CMD);
CCR_PR(REVID);
CCR_PR(BASEL);
CCR_PR(BASEH);
CCR_PR(UGCC);
CCR_PR(GCC);
CCR_PR(USC);
CCR_PR(VRAMRTC);
CCR_PR(VRAMSAC);
CCR_PR(VRAMBC);
#undef CCR_PR
printk(KERN_DEBUG "lcr: \n");
#define LCR_PR(n) printk(KERN_DEBUG "\t" #n " = \t%04x\n",\
tmio_ioread16(par->lcr + LCR_ ## n));
LCR_PR(UIS);
LCR_PR(VHPN);
LCR_PR(CFSAL);
LCR_PR(CFSAH);
LCR_PR(CFS);
LCR_PR(CFWS);
LCR_PR(BBIE);
LCR_PR(BBISC);
LCR_PR(CCS);
LCR_PR(BBES);
LCR_PR(CMDL);
LCR_PR(CMDH);
LCR_PR(CFC);
LCR_PR(CCIFC);
LCR_PR(HWT);
LCR_PR(LCDCCRC);
LCR_PR(LCDCC);
LCR_PR(LCDCOPC);
LCR_PR(LCDIS);
LCR_PR(LCDIM);
LCR_PR(LCDIE);
LCR_PR(GDSAL);
LCR_PR(GDSAH);
LCR_PR(VHPCL);
LCR_PR(VHPCH);
LCR_PR(GM);
LCR_PR(HT);
LCR_PR(HDS);
LCR_PR(HSS);
LCR_PR(HSE);
LCR_PR(HNP);
LCR_PR(VT);
LCR_PR(VDS);
LCR_PR(VSS);
LCR_PR(VSE);
LCR_PR(CDLN);
LCR_PR(ILN);
LCR_PR(SP);
LCR_PR(MISC);
LCR_PR(VIHSS);
LCR_PR(VIVS);
LCR_PR(VIVE);
LCR_PR(VIVSS);
LCR_PR(VCCIS);
LCR_PR(VIDWSAL);
LCR_PR(VIDWSAH);
LCR_PR(VIDRSAL);
LCR_PR(VIDRSAH);
LCR_PR(VIPDDST);
LCR_PR(VIPDDET);
LCR_PR(VIE);
LCR_PR(VCS);
LCR_PR(VPHWC);
LCR_PR(VPHS);
LCR_PR(VPVWC);
LCR_PR(VPVS);
LCR_PR(PLHPIX);
LCR_PR(XS);
LCR_PR(XCKHW);
LCR_PR(STHS);
LCR_PR(VT2);
LCR_PR(YCKSW);
LCR_PR(YSTS);
LCR_PR(PPOLS);
LCR_PR(PRECW);
LCR_PR(VCLKHW);
LCR_PR(OC);
#undef LCR_PR
}
#endif
#ifdef CONFIG_PM
static int tmiofb_suspend(struct platform_device *dev, pm_message_t state)
{
struct fb_info *info = platform_get_drvdata(dev);
#ifdef CONFIG_FB_TMIO_ACCELL
struct tmiofb_par *par = info->par;
#endif
struct mfd_cell *cell = dev->dev.platform_data;
int retval = 0;
acquire_console_sem();
fb_set_suspend(info, 1);
if (info->fbops->fb_sync)
info->fbops->fb_sync(info);
#ifdef CONFIG_FB_TMIO_ACCELL
/*
* The fb should be usable even if interrupts are disabled (and they are
* during suspend/resume). Switch temporary to forced polling.
*/
printk(KERN_INFO "tmiofb: switching to polling\n");
par->use_polling = true;
#endif
tmiofb_hw_stop(dev);
if (cell->suspend)
retval = cell->suspend(dev);
release_console_sem();
return retval;
}
static int tmiofb_resume(struct platform_device *dev)
{
struct fb_info *info = platform_get_drvdata(dev);
struct mfd_cell *cell = dev->dev.platform_data;
int retval = 0;
acquire_console_sem();
if (cell->resume) {
retval = cell->resume(dev);
if (retval)
goto out;
}
tmiofb_irq(-1, info);
tmiofb_hw_init(dev);
tmiofb_hw_mode(dev);
fb_set_suspend(info, 0);
out:
release_console_sem();
return retval;
}
#else
#define tmiofb_suspend NULL
#define tmiofb_resume NULL
#endif
static struct platform_driver tmiofb_driver = {
.driver.name = "tmio-fb",
.driver.owner = THIS_MODULE,
.probe = tmiofb_probe,
.remove = __devexit_p(tmiofb_remove),
.suspend = tmiofb_suspend,
.resume = tmiofb_resume,
};
/*--------------------------------------------------------------------------*/
#ifndef MODULE
static void __init tmiofb_setup(char *options)
{
char *this_opt;
if (!options || !*options)
return;
while ((this_opt = strsep(&options, ",")) != NULL) {
if (!*this_opt)
continue;
/*
* FIXME
*/
}
}
#endif
static int __init tmiofb_init(void)
{
#ifndef MODULE
char *option = NULL;
if (fb_get_options("tmiofb", &option))
return -ENODEV;
tmiofb_setup(option);
#endif
return platform_driver_register(&tmiofb_driver);
}
static void __exit tmiofb_cleanup(void)
{
platform_driver_unregister(&tmiofb_driver);
}
module_init(tmiofb_init);
module_exit(tmiofb_cleanup);
MODULE_DESCRIPTION("TMIO framebuffer driver");
MODULE_AUTHOR("Chris Humbert, Dirk Opfer, Dmitry Baryshkov");
MODULE_LICENSE("GPL");
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