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alistair23-linux/drivers/video/fbdev/tmiofb.c
Jani Nikula 8a48ac3393 video: constify fb ops across all drivers 
Now that the fbops member of struct fb_info is const, we can start
making the ops const as well.

This does not cover all drivers; some actually modify the fbops struct,
for example to adjust for different configurations, and others do more
involved things that I'd rather not touch in practically obsolete
drivers. Mostly this is the low hanging fruit where we can add "const"
and be done with it.

v3:
- un-constify atyfb, mb862xx, nvidia and uvesabf (0day)

v2:
- fix typo (Christophe de Dinechin)
- use "static const" instead of "const static" in mx3fb.c
- also constify smscufx.c

Cc: linux-fbdev@vger.kernel.org
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/ce67f14435f3af498f2e8bf35ce4be11f7504132.1575390740.git.jani.nikula@intel.com
2019-12-05 10:57:53 +02:00

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// SPDX-License-Identifier: GPL-2.0-only
/*
* 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
*/
#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 console_lock() */
#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;
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 tmio_fb_data *data = dev_get_platdata(&dev->dev);
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)
{
const struct mfd_cell *cell = mfd_get_cell(dev);
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 tmio_fb_data *data = dev_get_platdata(&dev->dev);
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 with 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 tmio_fb_data *data = dev_get_platdata(info->device);
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 tmio_fb_data *data = dev_get_platdata(info->device);
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 const 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 tmiofb_probe(struct platform_device *dev)
{
const struct mfd_cell *cell = mfd_get_cell(dev);
struct tmio_fb_data *data = dev_get_platdata(&dev->dev);
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;
}
if (ccr == NULL || lcr == NULL || vram == NULL || irq < 0) {
dev_err(&dev->dev, "missing resources\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, 0,
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;
fb_info(info, "%s frame buffer device\n", 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:
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 tmiofb_remove(struct platform_device *dev)
{
const struct mfd_cell *cell = mfd_get_cell(dev);
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);
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
const struct mfd_cell *cell = mfd_get_cell(dev);
int retval = 0;
console_lock();
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);
console_unlock();
return retval;
}
static int tmiofb_resume(struct platform_device *dev)
{
struct fb_info *info = platform_get_drvdata(dev);
const struct mfd_cell *cell = mfd_get_cell(dev);
int retval = 0;
console_lock();
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:
console_unlock();
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 = 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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