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linux/drivers/video/fbdev/sm501fb.c
Uwe Kleine-König 7b49f61a72 fbdev: sm501fb: Convert to platform remove callback returning void 
The .remove() callback for a platform driver returns an int which makes
many driver authors wrongly assume it's possible to do error handling by
returning an error code. However the value returned is (mostly) ignored
and this typically results in resource leaks. To improve here there is a
quest to make the remove callback return void. In the first step of this
quest all drivers are converted to .remove_new() which already returns
void.

Trivially convert this driver from always returning zero in the remove
callback to the void returning variant.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Helge Deller <deller@gmx.de>
2023-04-24 11:48:32 +02:00

2229 lines
53 KiB
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// SPDX-License-Identifier: GPL-2.0-only
/* linux/drivers/video/sm501fb.c
*
* Copyright (c) 2006 Simtec Electronics
* Vincent Sanders <vince@simtec.co.uk>
* Ben Dooks <ben@simtec.co.uk>
*
* Framebuffer driver for the Silicon Motion SM501
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/tty.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/fb.h>
#include <linux/init.h>
#include <linux/vmalloc.h>
#include <linux/dma-mapping.h>
#include <linux/interrupt.h>
#include <linux/workqueue.h>
#include <linux/wait.h>
#include <linux/platform_device.h>
#include <linux/clk.h>
#include <linux/console.h>
#include <linux/io.h>
#include <linux/uaccess.h>
#include <asm/div64.h>
#ifdef CONFIG_PM
#include <linux/pm.h>
#endif
#include <linux/sm501.h>
#include <linux/sm501-regs.h>
#include "edid.h"
static char *fb_mode = "640x480-16@60";
static unsigned long default_bpp = 16;
static const struct fb_videomode sm501_default_mode = {
.refresh = 60,
.xres = 640,
.yres = 480,
.pixclock = 20833,
.left_margin = 142,
.right_margin = 13,
.upper_margin = 21,
.lower_margin = 1,
.hsync_len = 69,
.vsync_len = 3,
.sync = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
.vmode = FB_VMODE_NONINTERLACED
};
#define NR_PALETTE 256
enum sm501_controller {
HEAD_CRT = 0,
HEAD_PANEL = 1,
};
/* SM501 memory address.
*
* This structure is used to track memory usage within the SM501 framebuffer
* allocation. The sm_addr field is stored as an offset as it is often used
* against both the physical and mapped addresses.
*/
struct sm501_mem {
unsigned long size;
unsigned long sm_addr; /* offset from base of sm501 fb. */
void __iomem *k_addr;
};
/* private data that is shared between all frambuffers* */
struct sm501fb_info {
struct device *dev;
struct fb_info *fb[2]; /* fb info for both heads */
struct resource *fbmem_res; /* framebuffer resource */
struct resource *regs_res; /* registers resource */
struct resource *regs2d_res; /* 2d registers resource */
struct sm501_platdata_fb *pdata; /* our platform data */
unsigned long pm_crt_ctrl; /* pm: crt ctrl save */
int irq;
int swap_endian; /* set to swap rgb=>bgr */
void __iomem *regs; /* remapped registers */
void __iomem *regs2d; /* 2d remapped registers */
void __iomem *fbmem; /* remapped framebuffer */
size_t fbmem_len; /* length of remapped region */
u8 *edid_data;
};
/* per-framebuffer private data */
struct sm501fb_par {
u32 pseudo_palette[16];
enum sm501_controller head;
struct sm501_mem cursor;
struct sm501_mem screen;
struct fb_ops ops;
void *store_fb;
void *store_cursor;
void __iomem *cursor_regs;
struct sm501fb_info *info;
};
/* Helper functions */
static inline int h_total(struct fb_var_screeninfo *var)
{
return var->xres + var->left_margin +
var->right_margin + var->hsync_len;
}
static inline int v_total(struct fb_var_screeninfo *var)
{
return var->yres + var->upper_margin +
var->lower_margin + var->vsync_len;
}
/* sm501fb_sync_regs()
*
* This call is mainly for PCI bus systems where we need to
* ensure that any writes to the bus are completed before the
* next phase, or after completing a function.
*/
static inline void sm501fb_sync_regs(struct sm501fb_info *info)
{
smc501_readl(info->regs);
}
/* sm501_alloc_mem
*
* This is an attempt to lay out memory for the two framebuffers and
* everything else
*
* |fbmem_res->start fbmem_res->end|
* | |
* |fb[0].fix.smem_start | |fb[1].fix.smem_start | 2K |
* |-> fb[0].fix.smem_len <-| spare |-> fb[1].fix.smem_len <-|-> cursors <-|
*
* The "spare" space is for the 2d engine data
* the fixed is space for the cursors (2x1Kbyte)
*
* we need to allocate memory for the 2D acceleration engine
* command list and the data for the engine to deal with.
*
* - all allocations must be 128bit aligned
* - cursors are 64x64x2 bits (1Kbyte)
*
*/
#define SM501_MEMF_CURSOR (1)
#define SM501_MEMF_PANEL (2)
#define SM501_MEMF_CRT (4)
#define SM501_MEMF_ACCEL (8)
static int sm501_alloc_mem(struct sm501fb_info *inf, struct sm501_mem *mem,
unsigned int why, size_t size, u32 smem_len)
{
struct sm501fb_par *par;
struct fb_info *fbi;
unsigned int ptr;
unsigned int end;
switch (why) {
case SM501_MEMF_CURSOR:
ptr = inf->fbmem_len - size;
inf->fbmem_len = ptr; /* adjust available memory. */
break;
case SM501_MEMF_PANEL:
if (size > inf->fbmem_len)
return -ENOMEM;
ptr = inf->fbmem_len - size;
fbi = inf->fb[HEAD_CRT];
/* round down, some programs such as directfb do not draw
* 0,0 correctly unless the start is aligned to a page start.
*/
if (ptr > 0)
ptr &= ~(PAGE_SIZE - 1);
if (fbi && ptr < smem_len)
return -ENOMEM;
break;
case SM501_MEMF_CRT:
ptr = 0;
/* check to see if we have panel memory allocated
* which would put an limit on available memory. */
fbi = inf->fb[HEAD_PANEL];
if (fbi) {
par = fbi->par;
end = par->screen.k_addr ? par->screen.sm_addr : inf->fbmem_len;
} else
end = inf->fbmem_len;
if ((ptr + size) > end)
return -ENOMEM;
break;
case SM501_MEMF_ACCEL:
fbi = inf->fb[HEAD_CRT];
ptr = fbi ? smem_len : 0;
fbi = inf->fb[HEAD_PANEL];
if (fbi) {
par = fbi->par;
end = par->screen.sm_addr;
} else
end = inf->fbmem_len;
if ((ptr + size) > end)
return -ENOMEM;
break;
default:
return -EINVAL;
}
mem->size = size;
mem->sm_addr = ptr;
mem->k_addr = inf->fbmem + ptr;
dev_dbg(inf->dev, "%s: result %08lx, %p - %u, %zd\n",
__func__, mem->sm_addr, mem->k_addr, why, size);
return 0;
}
/* sm501fb_ps_to_hz
*
* Converts a period in picoseconds to Hz.
*
* Note, we try to keep this in Hz to minimise rounding with
* the limited PLL settings on the SM501.
*/
static unsigned long sm501fb_ps_to_hz(unsigned long psvalue)
{
unsigned long long numerator=1000000000000ULL;
/* 10^12 / picosecond period gives frequency in Hz */
do_div(numerator, psvalue);
return (unsigned long)numerator;
}
/* sm501fb_hz_to_ps is identical to the opposite transform */
#define sm501fb_hz_to_ps(x) sm501fb_ps_to_hz(x)
/* sm501fb_setup_gamma
*
* Programs a linear 1.0 gamma ramp in case the gamma
* correction is enabled without programming anything else.
*/
static void sm501fb_setup_gamma(struct sm501fb_info *fbi,
unsigned long palette)
{
unsigned long value = 0;
int offset;
/* set gamma values */
for (offset = 0; offset < 256 * 4; offset += 4) {
smc501_writel(value, fbi->regs + palette + offset);
value += 0x010101; /* Advance RGB by 1,1,1.*/
}
}
/* sm501fb_check_var
*
* check common variables for both panel and crt
*/
static int sm501fb_check_var(struct fb_var_screeninfo *var,
struct fb_info *info)
{
struct sm501fb_par *par = info->par;
struct sm501fb_info *sm = par->info;
unsigned long tmp;
/* check we can fit these values into the registers */
if (var->hsync_len > 255 || var->vsync_len > 63)
return -EINVAL;
/* hdisplay end and hsync start */
if ((var->xres + var->right_margin) > 4096)
return -EINVAL;
/* vdisplay end and vsync start */
if ((var->yres + var->lower_margin) > 2048)
return -EINVAL;
/* hard limits of device */
if (h_total(var) > 4096 || v_total(var) > 2048)
return -EINVAL;
/* check our line length is going to be 128 bit aligned */
tmp = (var->xres * var->bits_per_pixel) / 8;
if ((tmp & 15) != 0)
return -EINVAL;
/* check the virtual size */
if (var->xres_virtual > 4096 || var->yres_virtual > 2048)
return -EINVAL;
/* can cope with 8,16 or 32bpp */
if (var->bits_per_pixel <= 8)
var->bits_per_pixel = 8;
else if (var->bits_per_pixel <= 16)
var->bits_per_pixel = 16;
else if (var->bits_per_pixel == 24)
var->bits_per_pixel = 32;
/* set r/g/b positions and validate bpp */
switch(var->bits_per_pixel) {
case 8:
var->red.length = var->bits_per_pixel;
var->red.offset = 0;
var->green.length = var->bits_per_pixel;
var->green.offset = 0;
var->blue.length = var->bits_per_pixel;
var->blue.offset = 0;
var->transp.length = 0;
var->transp.offset = 0;
break;
case 16:
if (sm->pdata->flags & SM501_FBPD_SWAP_FB_ENDIAN) {
var->blue.offset = 11;
var->green.offset = 5;
var->red.offset = 0;
} else {
var->red.offset = 11;
var->green.offset = 5;
var->blue.offset = 0;
}
var->transp.offset = 0;
var->red.length = 5;
var->green.length = 6;
var->blue.length = 5;
var->transp.length = 0;
break;
case 32:
if (sm->pdata->flags & SM501_FBPD_SWAP_FB_ENDIAN) {
var->transp.offset = 0;
var->red.offset = 8;
var->green.offset = 16;
var->blue.offset = 24;
} else {
var->transp.offset = 24;
var->red.offset = 16;
var->green.offset = 8;
var->blue.offset = 0;
}
var->red.length = 8;
var->green.length = 8;
var->blue.length = 8;
var->transp.length = 0;
break;
default:
return -EINVAL;
}
return 0;
}
/*
* sm501fb_check_var_crt():
*
* check the parameters for the CRT head, and either bring them
* back into range, or return -EINVAL.
*/
static int sm501fb_check_var_crt(struct fb_var_screeninfo *var,
struct fb_info *info)
{
return sm501fb_check_var(var, info);
}
/* sm501fb_check_var_pnl():
*
* check the parameters for the CRT head, and either bring them
* back into range, or return -EINVAL.
*/
static int sm501fb_check_var_pnl(struct fb_var_screeninfo *var,
struct fb_info *info)
{
return sm501fb_check_var(var, info);
}
/* sm501fb_set_par_common
*
* set common registers for framebuffers
*/
static int sm501fb_set_par_common(struct fb_info *info,
struct fb_var_screeninfo *var)
{
struct sm501fb_par *par = info->par;
struct sm501fb_info *fbi = par->info;
unsigned long pixclock; /* pixelclock in Hz */
unsigned long sm501pixclock; /* pixelclock the 501 can achieve in Hz */
unsigned int mem_type;
unsigned int clock_type;
unsigned int head_addr;
unsigned int smem_len;
dev_dbg(fbi->dev, "%s: %dx%d, bpp = %d, virtual %dx%d\n",
__func__, var->xres, var->yres, var->bits_per_pixel,
var->xres_virtual, var->yres_virtual);
switch (par->head) {
case HEAD_CRT:
mem_type = SM501_MEMF_CRT;
clock_type = SM501_CLOCK_V2XCLK;
head_addr = SM501_DC_CRT_FB_ADDR;
break;
case HEAD_PANEL:
mem_type = SM501_MEMF_PANEL;
clock_type = SM501_CLOCK_P2XCLK;
head_addr = SM501_DC_PANEL_FB_ADDR;
break;
default:
mem_type = 0; /* stop compiler warnings */
head_addr = 0;
clock_type = 0;
}
switch (var->bits_per_pixel) {
case 8:
info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
break;
case 16:
info->fix.visual = FB_VISUAL_TRUECOLOR;
break;
case 32:
info->fix.visual = FB_VISUAL_TRUECOLOR;
break;
}
/* allocate fb memory within 501 */
info->fix.line_length = (var->xres_virtual * var->bits_per_pixel)/8;
smem_len = info->fix.line_length * var->yres_virtual;
dev_dbg(fbi->dev, "%s: line length = %u\n", __func__,
info->fix.line_length);
if (sm501_alloc_mem(fbi, &par->screen, mem_type, smem_len, smem_len)) {
dev_err(fbi->dev, "no memory available\n");
return -ENOMEM;
}
mutex_lock(&info->mm_lock);
info->fix.smem_start = fbi->fbmem_res->start + par->screen.sm_addr;
info->fix.smem_len = smem_len;
mutex_unlock(&info->mm_lock);
info->screen_base = fbi->fbmem + par->screen.sm_addr;
info->screen_size = info->fix.smem_len;
/* set start of framebuffer to the screen */
smc501_writel(par->screen.sm_addr | SM501_ADDR_FLIP,
fbi->regs + head_addr);
/* program CRT clock */
pixclock = sm501fb_ps_to_hz(var->pixclock);
sm501pixclock = sm501_set_clock(fbi->dev->parent, clock_type,
pixclock);
/* update fb layer with actual clock used */
var->pixclock = sm501fb_hz_to_ps(sm501pixclock);
dev_dbg(fbi->dev, "%s: pixclock(ps) = %u, pixclock(Hz) = %lu, "
"sm501pixclock = %lu, error = %ld%%\n",
__func__, var->pixclock, pixclock, sm501pixclock,
((pixclock - sm501pixclock)*100)/pixclock);
return 0;
}
/* sm501fb_set_par_geometry
*
* set the geometry registers for specified framebuffer.
*/
static void sm501fb_set_par_geometry(struct fb_info *info,
struct fb_var_screeninfo *var)
{
struct sm501fb_par *par = info->par;
struct sm501fb_info *fbi = par->info;
void __iomem *base = fbi->regs;
unsigned long reg;
if (par->head == HEAD_CRT)
base += SM501_DC_CRT_H_TOT;
else
base += SM501_DC_PANEL_H_TOT;
/* set framebuffer width and display width */
reg = info->fix.line_length;
reg |= ((var->xres * var->bits_per_pixel)/8) << 16;
smc501_writel(reg, fbi->regs + (par->head == HEAD_CRT ?
SM501_DC_CRT_FB_OFFSET : SM501_DC_PANEL_FB_OFFSET));
/* program horizontal total */
reg = (h_total(var) - 1) << 16;
reg |= (var->xres - 1);
smc501_writel(reg, base + SM501_OFF_DC_H_TOT);
/* program horizontal sync */
reg = var->hsync_len << 16;
reg |= var->xres + var->right_margin - 1;
smc501_writel(reg, base + SM501_OFF_DC_H_SYNC);
/* program vertical total */
reg = (v_total(var) - 1) << 16;
reg |= (var->yres - 1);
smc501_writel(reg, base + SM501_OFF_DC_V_TOT);
/* program vertical sync */
reg = var->vsync_len << 16;
reg |= var->yres + var->lower_margin - 1;
smc501_writel(reg, base + SM501_OFF_DC_V_SYNC);
}
/* sm501fb_pan_crt
*
* pan the CRT display output within an virtual framebuffer
*/
static int sm501fb_pan_crt(struct fb_var_screeninfo *var,
struct fb_info *info)
{
struct sm501fb_par *par = info->par;
struct sm501fb_info *fbi = par->info;
unsigned int bytes_pixel = info->var.bits_per_pixel / 8;
unsigned long reg;
unsigned long xoffs;
xoffs = var->xoffset * bytes_pixel;
reg = smc501_readl(fbi->regs + SM501_DC_CRT_CONTROL);
reg &= ~SM501_DC_CRT_CONTROL_PIXEL_MASK;
reg |= ((xoffs & 15) / bytes_pixel) << 4;
smc501_writel(reg, fbi->regs + SM501_DC_CRT_CONTROL);
reg = (par->screen.sm_addr + xoffs +
var->yoffset * info->fix.line_length);
smc501_writel(reg | SM501_ADDR_FLIP, fbi->regs + SM501_DC_CRT_FB_ADDR);
sm501fb_sync_regs(fbi);
return 0;
}
/* sm501fb_pan_pnl
*
* pan the panel display output within an virtual framebuffer
*/
static int sm501fb_pan_pnl(struct fb_var_screeninfo *var,
struct fb_info *info)
{
struct sm501fb_par *par = info->par;
struct sm501fb_info *fbi = par->info;
unsigned long reg;
reg = var->xoffset | (info->var.xres_virtual << 16);
smc501_writel(reg, fbi->regs + SM501_DC_PANEL_FB_WIDTH);
reg = var->yoffset | (info->var.yres_virtual << 16);
smc501_writel(reg, fbi->regs + SM501_DC_PANEL_FB_HEIGHT);
sm501fb_sync_regs(fbi);
return 0;
}
/* sm501fb_set_par_crt
*
* Set the CRT video mode from the fb_info structure
*/
static int sm501fb_set_par_crt(struct fb_info *info)
{
struct sm501fb_par *par = info->par;
struct sm501fb_info *fbi = par->info;
struct fb_var_screeninfo *var = &info->var;
unsigned long control; /* control register */
int ret;
/* activate new configuration */
dev_dbg(fbi->dev, "%s(%p)\n", __func__, info);
/* enable CRT DAC - note 0 is on!*/
sm501_misc_control(fbi->dev->parent, 0, SM501_MISC_DAC_POWER);
control = smc501_readl(fbi->regs + SM501_DC_CRT_CONTROL);
control &= (SM501_DC_CRT_CONTROL_PIXEL_MASK |
SM501_DC_CRT_CONTROL_GAMMA |
SM501_DC_CRT_CONTROL_BLANK |
SM501_DC_CRT_CONTROL_SEL |
SM501_DC_CRT_CONTROL_CP |
SM501_DC_CRT_CONTROL_TVP);
/* set the sync polarities before we check data source */
if ((var->sync & FB_SYNC_HOR_HIGH_ACT) == 0)
control |= SM501_DC_CRT_CONTROL_HSP;
if ((var->sync & FB_SYNC_VERT_HIGH_ACT) == 0)
control |= SM501_DC_CRT_CONTROL_VSP;
if ((control & SM501_DC_CRT_CONTROL_SEL) == 0) {
/* the head is displaying panel data... */
sm501_alloc_mem(fbi, &par->screen, SM501_MEMF_CRT, 0,
info->fix.smem_len);
goto out_update;
}
ret = sm501fb_set_par_common(info, var);
if (ret) {
dev_err(fbi->dev, "failed to set common parameters\n");
return ret;
}
sm501fb_pan_crt(var, info);
sm501fb_set_par_geometry(info, var);
control |= SM501_FIFO_3; /* fill if >3 free slots */
switch(var->bits_per_pixel) {
case 8:
control |= SM501_DC_CRT_CONTROL_8BPP;
break;
case 16:
control |= SM501_DC_CRT_CONTROL_16BPP;
sm501fb_setup_gamma(fbi, SM501_DC_CRT_PALETTE);
break;
case 32:
control |= SM501_DC_CRT_CONTROL_32BPP;
sm501fb_setup_gamma(fbi, SM501_DC_CRT_PALETTE);
break;
default:
BUG();
}
control |= SM501_DC_CRT_CONTROL_SEL; /* CRT displays CRT data */
control |= SM501_DC_CRT_CONTROL_TE; /* enable CRT timing */
control |= SM501_DC_CRT_CONTROL_ENABLE; /* enable CRT plane */
out_update:
dev_dbg(fbi->dev, "new control is %08lx\n", control);
smc501_writel(control, fbi->regs + SM501_DC_CRT_CONTROL);
sm501fb_sync_regs(fbi);
return 0;
}
static void sm501fb_panel_power(struct sm501fb_info *fbi, int to)
{
unsigned long control;
void __iomem *ctrl_reg = fbi->regs + SM501_DC_PANEL_CONTROL;
struct sm501_platdata_fbsub *pd = fbi->pdata->fb_pnl;
control = smc501_readl(ctrl_reg);
if (to && (control & SM501_DC_PANEL_CONTROL_VDD) == 0) {
/* enable panel power */
control |= SM501_DC_PANEL_CONTROL_VDD; /* FPVDDEN */
smc501_writel(control, ctrl_reg);
sm501fb_sync_regs(fbi);
mdelay(10);
control |= SM501_DC_PANEL_CONTROL_DATA; /* DATA */
smc501_writel(control, ctrl_reg);
sm501fb_sync_regs(fbi);
mdelay(10);
/* VBIASEN */
if (!(pd->flags & SM501FB_FLAG_PANEL_NO_VBIASEN)) {
if (pd->flags & SM501FB_FLAG_PANEL_INV_VBIASEN)
control &= ~SM501_DC_PANEL_CONTROL_BIAS;
else
control |= SM501_DC_PANEL_CONTROL_BIAS;
smc501_writel(control, ctrl_reg);
sm501fb_sync_regs(fbi);
mdelay(10);
}
if (!(pd->flags & SM501FB_FLAG_PANEL_NO_FPEN)) {
if (pd->flags & SM501FB_FLAG_PANEL_INV_FPEN)
control &= ~SM501_DC_PANEL_CONTROL_FPEN;
else
control |= SM501_DC_PANEL_CONTROL_FPEN;
smc501_writel(control, ctrl_reg);
sm501fb_sync_regs(fbi);
mdelay(10);
}
} else if (!to && (control & SM501_DC_PANEL_CONTROL_VDD) != 0) {
/* disable panel power */
if (!(pd->flags & SM501FB_FLAG_PANEL_NO_FPEN)) {
if (pd->flags & SM501FB_FLAG_PANEL_INV_FPEN)
control |= SM501_DC_PANEL_CONTROL_FPEN;
else
control &= ~SM501_DC_PANEL_CONTROL_FPEN;
smc501_writel(control, ctrl_reg);
sm501fb_sync_regs(fbi);
mdelay(10);
}
if (!(pd->flags & SM501FB_FLAG_PANEL_NO_VBIASEN)) {
if (pd->flags & SM501FB_FLAG_PANEL_INV_VBIASEN)
control |= SM501_DC_PANEL_CONTROL_BIAS;
else
control &= ~SM501_DC_PANEL_CONTROL_BIAS;
smc501_writel(control, ctrl_reg);
sm501fb_sync_regs(fbi);
mdelay(10);
}
control &= ~SM501_DC_PANEL_CONTROL_DATA;
smc501_writel(control, ctrl_reg);
sm501fb_sync_regs(fbi);
mdelay(10);
control &= ~SM501_DC_PANEL_CONTROL_VDD;
smc501_writel(control, ctrl_reg);
sm501fb_sync_regs(fbi);
mdelay(10);
}
sm501fb_sync_regs(fbi);
}
/* sm501fb_set_par_pnl
*
* Set the panel video mode from the fb_info structure
*/
static int sm501fb_set_par_pnl(struct fb_info *info)
{
struct sm501fb_par *par = info->par;
struct sm501fb_info *fbi = par->info;
struct fb_var_screeninfo *var = &info->var;
unsigned long control;
unsigned long reg;
int ret;
dev_dbg(fbi->dev, "%s(%p)\n", __func__, info);
/* activate this new configuration */
ret = sm501fb_set_par_common(info, var);
if (ret)
return ret;
sm501fb_pan_pnl(var, info);
sm501fb_set_par_geometry(info, var);
/* update control register */
control = smc501_readl(fbi->regs + SM501_DC_PANEL_CONTROL);
control &= (SM501_DC_PANEL_CONTROL_GAMMA |
SM501_DC_PANEL_CONTROL_VDD |
SM501_DC_PANEL_CONTROL_DATA |
SM501_DC_PANEL_CONTROL_BIAS |
SM501_DC_PANEL_CONTROL_FPEN |
SM501_DC_PANEL_CONTROL_CP |
SM501_DC_PANEL_CONTROL_CK |
SM501_DC_PANEL_CONTROL_HP |
SM501_DC_PANEL_CONTROL_VP |
SM501_DC_PANEL_CONTROL_HPD |
SM501_DC_PANEL_CONTROL_VPD);
control |= SM501_FIFO_3; /* fill if >3 free slots */
switch(var->bits_per_pixel) {
case 8:
control |= SM501_DC_PANEL_CONTROL_8BPP;
break;
case 16:
control |= SM501_DC_PANEL_CONTROL_16BPP;
sm501fb_setup_gamma(fbi, SM501_DC_PANEL_PALETTE);
break;
case 32:
control |= SM501_DC_PANEL_CONTROL_32BPP;
sm501fb_setup_gamma(fbi, SM501_DC_PANEL_PALETTE);
break;
default:
BUG();
}
smc501_writel(0x0, fbi->regs + SM501_DC_PANEL_PANNING_CONTROL);
/* panel plane top left and bottom right location */
smc501_writel(0x00, fbi->regs + SM501_DC_PANEL_TL_LOC);
reg = var->xres - 1;
reg |= (var->yres - 1) << 16;
smc501_writel(reg, fbi->regs + SM501_DC_PANEL_BR_LOC);
/* program panel control register */
control |= SM501_DC_PANEL_CONTROL_TE; /* enable PANEL timing */
control |= SM501_DC_PANEL_CONTROL_EN; /* enable PANEL gfx plane */
if ((var->sync & FB_SYNC_HOR_HIGH_ACT) == 0)
control |= SM501_DC_PANEL_CONTROL_HSP;
if ((var->sync & FB_SYNC_VERT_HIGH_ACT) == 0)
control |= SM501_DC_PANEL_CONTROL_VSP;
smc501_writel(control, fbi->regs + SM501_DC_PANEL_CONTROL);
sm501fb_sync_regs(fbi);
/* ensure the panel interface is not tristated at this point */
sm501_modify_reg(fbi->dev->parent, SM501_SYSTEM_CONTROL,
0, SM501_SYSCTRL_PANEL_TRISTATE);
/* power the panel up */
sm501fb_panel_power(fbi, 1);
return 0;
}
/* chan_to_field
*
* convert a colour value into a field position
*
* from pxafb.c
*/
static inline unsigned int chan_to_field(unsigned int chan,
struct fb_bitfield *bf)
{
chan &= 0xffff;
chan >>= 16 - bf->length;
return chan << bf->offset;
}
/* sm501fb_setcolreg
*
* set the colour mapping for modes that support palettised data
*/
static int sm501fb_setcolreg(unsigned regno,
unsigned red, unsigned green, unsigned blue,
unsigned transp, struct fb_info *info)
{
struct sm501fb_par *par = info->par;
struct sm501fb_info *fbi = par->info;
void __iomem *base = fbi->regs;
unsigned int val;
if (par->head == HEAD_CRT)
base += SM501_DC_CRT_PALETTE;
else
base += SM501_DC_PANEL_PALETTE;
switch (info->fix.visual) {
case FB_VISUAL_TRUECOLOR:
/* true-colour, use pseuo-palette */
if (regno < 16) {
u32 *pal = par->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;
}
break;
case FB_VISUAL_PSEUDOCOLOR:
if (regno < 256) {
val = (red >> 8) << 16;
val |= (green >> 8) << 8;
val |= blue >> 8;
smc501_writel(val, base + (regno * 4));
}
break;
default:
return 1; /* unknown type */
}
return 0;
}
/* sm501fb_blank_pnl
*
* Blank or un-blank the panel interface
*/
static int sm501fb_blank_pnl(int blank_mode, struct fb_info *info)
{
struct sm501fb_par *par = info->par;
struct sm501fb_info *fbi = par->info;
dev_dbg(fbi->dev, "%s(mode=%d, %p)\n", __func__, blank_mode, info);
switch (blank_mode) {
case FB_BLANK_POWERDOWN:
sm501fb_panel_power(fbi, 0);
break;
case FB_BLANK_UNBLANK:
sm501fb_panel_power(fbi, 1);
break;
case FB_BLANK_NORMAL:
case FB_BLANK_VSYNC_SUSPEND:
case FB_BLANK_HSYNC_SUSPEND:
default:
return 1;
}
return 0;
}
/* sm501fb_blank_crt
*
* Blank or un-blank the crt interface
*/
static int sm501fb_blank_crt(int blank_mode, struct fb_info *info)
{
struct sm501fb_par *par = info->par;
struct sm501fb_info *fbi = par->info;
unsigned long ctrl;
dev_dbg(fbi->dev, "%s(mode=%d, %p)\n", __func__, blank_mode, info);
ctrl = smc501_readl(fbi->regs + SM501_DC_CRT_CONTROL);
switch (blank_mode) {
case FB_BLANK_POWERDOWN:
ctrl &= ~SM501_DC_CRT_CONTROL_ENABLE;
sm501_misc_control(fbi->dev->parent, SM501_MISC_DAC_POWER, 0);
fallthrough;
case FB_BLANK_NORMAL:
ctrl |= SM501_DC_CRT_CONTROL_BLANK;
break;
case FB_BLANK_UNBLANK:
ctrl &= ~SM501_DC_CRT_CONTROL_BLANK;
ctrl |= SM501_DC_CRT_CONTROL_ENABLE;
sm501_misc_control(fbi->dev->parent, 0, SM501_MISC_DAC_POWER);
break;
case FB_BLANK_VSYNC_SUSPEND:
case FB_BLANK_HSYNC_SUSPEND:
default:
return 1;
}
smc501_writel(ctrl, fbi->regs + SM501_DC_CRT_CONTROL);
sm501fb_sync_regs(fbi);
return 0;
}
/* sm501fb_cursor
*
* set or change the hardware cursor parameters
*/
static int sm501fb_cursor(struct fb_info *info, struct fb_cursor *cursor)
{
struct sm501fb_par *par = info->par;
struct sm501fb_info *fbi = par->info;
void __iomem *base = fbi->regs;
unsigned long hwc_addr;
unsigned long fg, bg;
dev_dbg(fbi->dev, "%s(%p,%p)\n", __func__, info, cursor);
if (par->head == HEAD_CRT)
base += SM501_DC_CRT_HWC_BASE;
else
base += SM501_DC_PANEL_HWC_BASE;
/* check not being asked to exceed capabilities */
if (cursor->image.width > 64)
return -EINVAL;
if (cursor->image.height > 64)
return -EINVAL;
if (cursor->image.depth > 1)
return -EINVAL;
hwc_addr = smc501_readl(base + SM501_OFF_HWC_ADDR);
if (cursor->enable)
smc501_writel(hwc_addr | SM501_HWC_EN,
base + SM501_OFF_HWC_ADDR);
else
smc501_writel(hwc_addr & ~SM501_HWC_EN,
base + SM501_OFF_HWC_ADDR);
/* set data */
if (cursor->set & FB_CUR_SETPOS) {
unsigned int x = cursor->image.dx;
unsigned int y = cursor->image.dy;
if (x >= 2048 || y >= 2048 )
return -EINVAL;
dev_dbg(fbi->dev, "set position %d,%d\n", x, y);
//y += cursor->image.height;
smc501_writel(x | (y << 16), base + SM501_OFF_HWC_LOC);
}
if (cursor->set & FB_CUR_SETCMAP) {
unsigned int bg_col = cursor->image.bg_color;
unsigned int fg_col = cursor->image.fg_color;
dev_dbg(fbi->dev, "%s: update cmap (%08x,%08x)\n",
__func__, bg_col, fg_col);
bg = ((info->cmap.red[bg_col] & 0xF8) << 8) |
((info->cmap.green[bg_col] & 0xFC) << 3) |
((info->cmap.blue[bg_col] & 0xF8) >> 3);
fg = ((info->cmap.red[fg_col] & 0xF8) << 8) |
((info->cmap.green[fg_col] & 0xFC) << 3) |
((info->cmap.blue[fg_col] & 0xF8) >> 3);
dev_dbg(fbi->dev, "fgcol %08lx, bgcol %08lx\n", fg, bg);
smc501_writel(bg, base + SM501_OFF_HWC_COLOR_1_2);
smc501_writel(fg, base + SM501_OFF_HWC_COLOR_3);
}
if (cursor->set & FB_CUR_SETSIZE ||
cursor->set & (FB_CUR_SETIMAGE | FB_CUR_SETSHAPE)) {
/* SM501 cursor is a two bpp 64x64 bitmap this routine
* clears it to transparent then combines the cursor
* shape plane with the colour plane to set the
* cursor */
int x, y;
const unsigned char *pcol = cursor->image.data;
const unsigned char *pmsk = cursor->mask;
void __iomem *dst = par->cursor.k_addr;
unsigned char dcol = 0;
unsigned char dmsk = 0;
unsigned int op;
dev_dbg(fbi->dev, "%s: setting shape (%d,%d)\n",
__func__, cursor->image.width, cursor->image.height);
for (op = 0; op < (64*64*2)/8; op+=4)
smc501_writel(0x0, dst + op);
for (y = 0; y < cursor->image.height; y++) {
for (x = 0; x < cursor->image.width; x++) {
if ((x % 8) == 0) {
dcol = *pcol++;
dmsk = *pmsk++;
} else {
dcol >>= 1;
dmsk >>= 1;
}
if (dmsk & 1) {
op = (dcol & 1) ? 1 : 3;
op <<= ((x % 4) * 2);
op |= readb(dst + (x / 4));
writeb(op, dst + (x / 4));
}
}
dst += (64*2)/8;
}
}
sm501fb_sync_regs(fbi); /* ensure cursor data flushed */
return 0;
}
/* sm501fb_crtsrc_show
*
* device attribute code to show where the crt output is sourced from
*/
static ssize_t sm501fb_crtsrc_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct sm501fb_info *info = dev_get_drvdata(dev);
unsigned long ctrl;
ctrl = smc501_readl(info->regs + SM501_DC_CRT_CONTROL);
ctrl &= SM501_DC_CRT_CONTROL_SEL;
return sysfs_emit(buf, "%s\n", ctrl ? "crt" : "panel");
}
/* sm501fb_crtsrc_show
*
* device attribute code to set where the crt output is sourced from
*/
static ssize_t sm501fb_crtsrc_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t len)
{
struct sm501fb_info *info = dev_get_drvdata(dev);
enum sm501_controller head;
unsigned long ctrl;
if (len < 1)
return -EINVAL;
if (strncasecmp(buf, "crt", 3) == 0)
head = HEAD_CRT;
else if (strncasecmp(buf, "panel", 5) == 0)
head = HEAD_PANEL;
else
return -EINVAL;
dev_info(dev, "setting crt source to head %d\n", head);
ctrl = smc501_readl(info->regs + SM501_DC_CRT_CONTROL);
if (head == HEAD_CRT) {
ctrl |= SM501_DC_CRT_CONTROL_SEL;
ctrl |= SM501_DC_CRT_CONTROL_ENABLE;
ctrl |= SM501_DC_CRT_CONTROL_TE;
} else {
ctrl &= ~SM501_DC_CRT_CONTROL_SEL;
ctrl &= ~SM501_DC_CRT_CONTROL_ENABLE;
ctrl &= ~SM501_DC_CRT_CONTROL_TE;
}
smc501_writel(ctrl, info->regs + SM501_DC_CRT_CONTROL);
sm501fb_sync_regs(info);
return len;
}
/* Prepare the device_attr for registration with sysfs later */
static DEVICE_ATTR(crt_src, 0664, sm501fb_crtsrc_show, sm501fb_crtsrc_store);
/* sm501fb_show_regs
*
* show the primary sm501 registers
*/
static int sm501fb_show_regs(struct sm501fb_info *info, char *ptr,
unsigned int start, unsigned int len)
{
void __iomem *mem = info->regs;
char *buf = ptr;
unsigned int reg;
for (reg = start; reg < (len + start); reg += 4)
ptr += sprintf(ptr, "%08x = %08x\n", reg,
smc501_readl(mem + reg));
return ptr - buf;
}
/* sm501fb_debug_show_crt
*
* show the crt control and cursor registers
*/
static ssize_t sm501fb_debug_show_crt(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct sm501fb_info *info = dev_get_drvdata(dev);
char *ptr = buf;
ptr += sm501fb_show_regs(info, ptr, SM501_DC_CRT_CONTROL, 0x40);
ptr += sm501fb_show_regs(info, ptr, SM501_DC_CRT_HWC_BASE, 0x10);
return ptr - buf;
}
static DEVICE_ATTR(fbregs_crt, 0444, sm501fb_debug_show_crt, NULL);
/* sm501fb_debug_show_pnl
*
* show the panel control and cursor registers
*/
static ssize_t sm501fb_debug_show_pnl(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct sm501fb_info *info = dev_get_drvdata(dev);
char *ptr = buf;
ptr += sm501fb_show_regs(info, ptr, 0x0, 0x40);
ptr += sm501fb_show_regs(info, ptr, SM501_DC_PANEL_HWC_BASE, 0x10);
return ptr - buf;
}
static DEVICE_ATTR(fbregs_pnl, 0444, sm501fb_debug_show_pnl, NULL);
static struct attribute *sm501fb_attrs[] = {
&dev_attr_crt_src.attr,
&dev_attr_fbregs_pnl.attr,
&dev_attr_fbregs_crt.attr,
NULL,
};
ATTRIBUTE_GROUPS(sm501fb);
/* acceleration operations */
static int sm501fb_sync(struct fb_info *info)
{
int count = 1000000;
struct sm501fb_par *par = info->par;
struct sm501fb_info *fbi = par->info;
/* wait for the 2d engine to be ready */
while ((count > 0) &&
(smc501_readl(fbi->regs + SM501_SYSTEM_CONTROL) &
SM501_SYSCTRL_2D_ENGINE_STATUS) != 0)
count--;
if (count <= 0) {
dev_err(info->dev, "Timeout waiting for 2d engine sync\n");
return 1;
}
return 0;
}
static void sm501fb_copyarea(struct fb_info *info, const struct fb_copyarea *area)
{
struct sm501fb_par *par = info->par;
struct sm501fb_info *fbi = par->info;
int width = area->width;
int height = area->height;
int sx = area->sx;
int sy = area->sy;
int dx = area->dx;
int dy = area->dy;
unsigned long rtl = 0;
/* source clip */
if ((sx >= info->var.xres_virtual) ||
(sy >= info->var.yres_virtual))
/* source Area not within virtual screen, skipping */
return;
if ((sx + width) >= info->var.xres_virtual)
width = info->var.xres_virtual - sx - 1;
if ((sy + height) >= info->var.yres_virtual)
height = info->var.yres_virtual - sy - 1;
/* dest clip */
if ((dx >= info->var.xres_virtual) ||
(dy >= info->var.yres_virtual))
/* Destination Area not within virtual screen, skipping */
return;
if ((dx + width) >= info->var.xres_virtual)
width = info->var.xres_virtual - dx - 1;
if ((dy + height) >= info->var.yres_virtual)
height = info->var.yres_virtual - dy - 1;
if ((sx < dx) || (sy < dy)) {
rtl = 1 << 27;
sx += width - 1;
dx += width - 1;
sy += height - 1;
dy += height - 1;
}
if (sm501fb_sync(info))
return;
/* set the base addresses */
smc501_writel(par->screen.sm_addr, fbi->regs2d + SM501_2D_SOURCE_BASE);
smc501_writel(par->screen.sm_addr,
fbi->regs2d + SM501_2D_DESTINATION_BASE);
/* set the window width */
smc501_writel((info->var.xres << 16) | info->var.xres,
fbi->regs2d + SM501_2D_WINDOW_WIDTH);
/* set window stride */
smc501_writel((info->var.xres_virtual << 16) | info->var.xres_virtual,
fbi->regs2d + SM501_2D_PITCH);
/* set data format */
switch (info->var.bits_per_pixel) {
case 8:
smc501_writel(0, fbi->regs2d + SM501_2D_STRETCH);
break;
case 16:
smc501_writel(0x00100000, fbi->regs2d + SM501_2D_STRETCH);
break;
case 32:
smc501_writel(0x00200000, fbi->regs2d + SM501_2D_STRETCH);
break;
}
/* 2d compare mask */
smc501_writel(0xffffffff, fbi->regs2d + SM501_2D_COLOR_COMPARE_MASK);
/* 2d mask */
smc501_writel(0xffffffff, fbi->regs2d + SM501_2D_MASK);
/* source and destination x y */
smc501_writel((sx << 16) | sy, fbi->regs2d + SM501_2D_SOURCE);
smc501_writel((dx << 16) | dy, fbi->regs2d + SM501_2D_DESTINATION);
/* w/h */
smc501_writel((width << 16) | height, fbi->regs2d + SM501_2D_DIMENSION);
/* do area move */
smc501_writel(0x800000cc | rtl, fbi->regs2d + SM501_2D_CONTROL);
}
static void sm501fb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
{
struct sm501fb_par *par = info->par;
struct sm501fb_info *fbi = par->info;
int width = rect->width, height = rect->height;
if ((rect->dx >= info->var.xres_virtual) ||
(rect->dy >= info->var.yres_virtual))
/* Rectangle not within virtual screen, skipping */
return;
if ((rect->dx + width) >= info->var.xres_virtual)
width = info->var.xres_virtual - rect->dx - 1;
if ((rect->dy + height) >= info->var.yres_virtual)
height = info->var.yres_virtual - rect->dy - 1;
if (sm501fb_sync(info))
return;
/* set the base addresses */
smc501_writel(par->screen.sm_addr, fbi->regs2d + SM501_2D_SOURCE_BASE);
smc501_writel(par->screen.sm_addr,
fbi->regs2d + SM501_2D_DESTINATION_BASE);
/* set the window width */
smc501_writel((info->var.xres << 16) | info->var.xres,
fbi->regs2d + SM501_2D_WINDOW_WIDTH);
/* set window stride */
smc501_writel((info->var.xres_virtual << 16) | info->var.xres_virtual,
fbi->regs2d + SM501_2D_PITCH);
/* set data format */
switch (info->var.bits_per_pixel) {
case 8:
smc501_writel(0, fbi->regs2d + SM501_2D_STRETCH);
break;
case 16:
smc501_writel(0x00100000, fbi->regs2d + SM501_2D_STRETCH);
break;
case 32:
smc501_writel(0x00200000, fbi->regs2d + SM501_2D_STRETCH);
break;
}
/* 2d compare mask */
smc501_writel(0xffffffff, fbi->regs2d + SM501_2D_COLOR_COMPARE_MASK);
/* 2d mask */
smc501_writel(0xffffffff, fbi->regs2d + SM501_2D_MASK);
/* colour */
smc501_writel(rect->color, fbi->regs2d + SM501_2D_FOREGROUND);
/* x y */
smc501_writel((rect->dx << 16) | rect->dy,
fbi->regs2d + SM501_2D_DESTINATION);
/* w/h */
smc501_writel((width << 16) | height, fbi->regs2d + SM501_2D_DIMENSION);
/* do rectangle fill */
smc501_writel(0x800100cc, fbi->regs2d + SM501_2D_CONTROL);
}
static struct fb_ops sm501fb_ops_crt = {
.owner = THIS_MODULE,
.fb_check_var = sm501fb_check_var_crt,
.fb_set_par = sm501fb_set_par_crt,
.fb_blank = sm501fb_blank_crt,
.fb_setcolreg = sm501fb_setcolreg,
.fb_pan_display = sm501fb_pan_crt,
.fb_cursor = sm501fb_cursor,
.fb_fillrect = sm501fb_fillrect,
.fb_copyarea = sm501fb_copyarea,
.fb_imageblit = cfb_imageblit,
.fb_sync = sm501fb_sync,
};
static struct fb_ops sm501fb_ops_pnl = {
.owner = THIS_MODULE,
.fb_check_var = sm501fb_check_var_pnl,
.fb_set_par = sm501fb_set_par_pnl,
.fb_pan_display = sm501fb_pan_pnl,
.fb_blank = sm501fb_blank_pnl,
.fb_setcolreg = sm501fb_setcolreg,
.fb_cursor = sm501fb_cursor,
.fb_fillrect = sm501fb_fillrect,
.fb_copyarea = sm501fb_copyarea,
.fb_imageblit = cfb_imageblit,
.fb_sync = sm501fb_sync,
};
/* sm501_init_cursor
*
* initialise hw cursor parameters
*/
static int sm501_init_cursor(struct fb_info *fbi, unsigned int reg_base)
{
struct sm501fb_par *par;
struct sm501fb_info *info;
int ret;
if (fbi == NULL)
return 0;
par = fbi->par;
info = par->info;
par->cursor_regs = info->regs + reg_base;
ret = sm501_alloc_mem(info, &par->cursor, SM501_MEMF_CURSOR, 1024,
fbi->fix.smem_len);
if (ret < 0)
return ret;
/* initialise the colour registers */
smc501_writel(par->cursor.sm_addr,
par->cursor_regs + SM501_OFF_HWC_ADDR);
smc501_writel(0x00, par->cursor_regs + SM501_OFF_HWC_LOC);
smc501_writel(0x00, par->cursor_regs + SM501_OFF_HWC_COLOR_1_2);
smc501_writel(0x00, par->cursor_regs + SM501_OFF_HWC_COLOR_3);
sm501fb_sync_regs(info);
return 0;
}
/* sm501fb_info_start
*
* fills the par structure claiming resources and remapping etc.
*/
static int sm501fb_start(struct sm501fb_info *info,
struct platform_device *pdev)
{
struct resource *res;
struct device *dev = &pdev->dev;
int k;
int ret;
info->irq = ret = platform_get_irq(pdev, 0);
if (ret < 0) {
/* we currently do not use the IRQ */
dev_warn(dev, "no irq for device\n");
}
/* allocate, reserve and remap resources for display
* controller registers */
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (res == NULL) {
dev_err(dev, "no resource definition for registers\n");
ret = -ENOENT;
goto err_release;
}
info->regs_res = request_mem_region(res->start,
resource_size(res),
pdev->name);
if (info->regs_res == NULL) {
dev_err(dev, "cannot claim registers\n");
ret = -ENXIO;
goto err_release;
}
info->regs = ioremap(res->start, resource_size(res));
if (info->regs == NULL) {
dev_err(dev, "cannot remap registers\n");
ret = -ENXIO;
goto err_regs_res;
}
/* allocate, reserve and remap resources for 2d
* controller registers */
res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
if (res == NULL) {
dev_err(dev, "no resource definition for 2d registers\n");
ret = -ENOENT;
goto err_regs_map;
}
info->regs2d_res = request_mem_region(res->start,
resource_size(res),
pdev->name);
if (info->regs2d_res == NULL) {
dev_err(dev, "cannot claim registers\n");
ret = -ENXIO;
goto err_regs_map;
}
info->regs2d = ioremap(res->start, resource_size(res));
if (info->regs2d == NULL) {
dev_err(dev, "cannot remap registers\n");
ret = -ENXIO;
goto err_regs2d_res;
}
/* allocate, reserve resources for framebuffer */
res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
if (res == NULL) {
dev_err(dev, "no memory resource defined\n");
ret = -ENXIO;
goto err_regs2d_map;
}
info->fbmem_res = request_mem_region(res->start,
resource_size(res),
pdev->name);
if (info->fbmem_res == NULL) {
dev_err(dev, "cannot claim framebuffer\n");
ret = -ENXIO;
goto err_regs2d_map;
}
info->fbmem = ioremap(res->start, resource_size(res));
if (info->fbmem == NULL) {
dev_err(dev, "cannot remap framebuffer\n");
ret = -ENXIO;
goto err_mem_res;
}
info->fbmem_len = resource_size(res);
/* clear framebuffer memory - avoids garbage data on unused fb */
memset_io(info->fbmem, 0, info->fbmem_len);
/* clear palette ram - undefined at power on */
for (k = 0; k < (256 * 3); k++)
smc501_writel(0, info->regs + SM501_DC_PANEL_PALETTE + (k * 4));
/* enable display controller */
sm501_unit_power(dev->parent, SM501_GATE_DISPLAY, 1);
/* enable 2d controller */
sm501_unit_power(dev->parent, SM501_GATE_2D_ENGINE, 1);
/* setup cursors */
sm501_init_cursor(info->fb[HEAD_CRT], SM501_DC_CRT_HWC_ADDR);
sm501_init_cursor(info->fb[HEAD_PANEL], SM501_DC_PANEL_HWC_ADDR);
return 0; /* everything is setup */
err_mem_res:
release_mem_region(info->fbmem_res->start,
resource_size(info->fbmem_res));
err_regs2d_map:
iounmap(info->regs2d);
err_regs2d_res:
release_mem_region(info->regs2d_res->start,
resource_size(info->regs2d_res));
err_regs_map:
iounmap(info->regs);
err_regs_res:
release_mem_region(info->regs_res->start,
resource_size(info->regs_res));
err_release:
return ret;
}
static void sm501fb_stop(struct sm501fb_info *info)
{
/* disable display controller */
sm501_unit_power(info->dev->parent, SM501_GATE_DISPLAY, 0);
iounmap(info->fbmem);
release_mem_region(info->fbmem_res->start,
resource_size(info->fbmem_res));
iounmap(info->regs2d);
release_mem_region(info->regs2d_res->start,
resource_size(info->regs2d_res));
iounmap(info->regs);
release_mem_region(info->regs_res->start,
resource_size(info->regs_res));
}
static int sm501fb_init_fb(struct fb_info *fb, enum sm501_controller head,
const char *fbname)
{
struct sm501_platdata_fbsub *pd;
struct sm501fb_par *par = fb->par;
struct sm501fb_info *info = par->info;
unsigned long ctrl;
unsigned int enable;
int ret;
switch (head) {
case HEAD_CRT:
pd = info->pdata->fb_crt;
ctrl = smc501_readl(info->regs + SM501_DC_CRT_CONTROL);
enable = (ctrl & SM501_DC_CRT_CONTROL_ENABLE) ? 1 : 0;
/* ensure we set the correct source register */
if (info->pdata->fb_route != SM501_FB_CRT_PANEL) {
ctrl |= SM501_DC_CRT_CONTROL_SEL;
smc501_writel(ctrl, info->regs + SM501_DC_CRT_CONTROL);
}
break;
case HEAD_PANEL:
pd = info->pdata->fb_pnl;
ctrl = smc501_readl(info->regs + SM501_DC_PANEL_CONTROL);
enable = (ctrl & SM501_DC_PANEL_CONTROL_EN) ? 1 : 0;
break;
default:
pd = NULL; /* stop compiler warnings */
ctrl = 0;
enable = 0;
BUG();
}
dev_info(info->dev, "fb %s %sabled at start\n",
fbname, enable ? "en" : "dis");
/* check to see if our routing allows this */
if (head == HEAD_CRT && info->pdata->fb_route == SM501_FB_CRT_PANEL) {
ctrl &= ~SM501_DC_CRT_CONTROL_SEL;
smc501_writel(ctrl, info->regs + SM501_DC_CRT_CONTROL);
enable = 0;
}
strscpy(fb->fix.id, fbname, sizeof(fb->fix.id));
memcpy(&par->ops,
(head == HEAD_CRT) ? &sm501fb_ops_crt : &sm501fb_ops_pnl,
sizeof(struct fb_ops));
/* update ops dependent on what we've been passed */
if ((pd->flags & SM501FB_FLAG_USE_HWCURSOR) == 0)
par->ops.fb_cursor = NULL;
fb->fbops = &par->ops;
fb->flags = FBINFO_FLAG_DEFAULT | FBINFO_READS_FAST |
FBINFO_HWACCEL_COPYAREA | FBINFO_HWACCEL_FILLRECT |
FBINFO_HWACCEL_XPAN | FBINFO_HWACCEL_YPAN;
#if defined(CONFIG_OF)
#ifdef __BIG_ENDIAN
if (of_property_read_bool(info->dev->parent->of_node, "little-endian"))
fb->flags |= FBINFO_FOREIGN_ENDIAN;
#else
if (of_property_read_bool(info->dev->parent->of_node, "big-endian"))
fb->flags |= FBINFO_FOREIGN_ENDIAN;
#endif
#endif
/* fixed data */
fb->fix.type = FB_TYPE_PACKED_PIXELS;
fb->fix.type_aux = 0;
fb->fix.xpanstep = 1;
fb->fix.ypanstep = 1;
fb->fix.ywrapstep = 0;
fb->fix.accel = FB_ACCEL_NONE;
/* screenmode */
fb->var.nonstd = 0;
fb->var.activate = FB_ACTIVATE_NOW;
fb->var.accel_flags = 0;
fb->var.vmode = FB_VMODE_NONINTERLACED;
fb->var.bits_per_pixel = 16;
if (info->edid_data) {
/* Now build modedb from EDID */
fb_edid_to_monspecs(info->edid_data, &fb->monspecs);
fb_videomode_to_modelist(fb->monspecs.modedb,
fb->monspecs.modedb_len,
&fb->modelist);
}
if (enable && (pd->flags & SM501FB_FLAG_USE_INIT_MODE) && 0) {
/* TODO read the mode from the current display */
} else {
if (pd->def_mode) {
dev_info(info->dev, "using supplied mode\n");
fb_videomode_to_var(&fb->var, pd->def_mode);
fb->var.bits_per_pixel = pd->def_bpp ? pd->def_bpp : 8;
fb->var.xres_virtual = fb->var.xres;
fb->var.yres_virtual = fb->var.yres;
} else {
if (info->edid_data) {
ret = fb_find_mode(&fb->var, fb, fb_mode,
fb->monspecs.modedb,
fb->monspecs.modedb_len,
&sm501_default_mode, default_bpp);
/* edid_data is no longer needed, free it */
kfree(info->edid_data);
} else {
ret = fb_find_mode(&fb->var, fb,
NULL, NULL, 0, NULL, 8);
}
switch (ret) {
case 1:
dev_info(info->dev, "using mode specified in "
"@mode\n");
break;
case 2:
dev_info(info->dev, "using mode specified in "
"@mode with ignored refresh rate\n");
break;
case 3:
dev_info(info->dev, "using mode default "
"mode\n");
break;
case 4:
dev_info(info->dev, "using mode from list\n");
break;
default:
dev_info(info->dev, "ret = %d\n", ret);
dev_info(info->dev, "failed to find mode\n");
return -EINVAL;
}
}
}
/* initialise and set the palette */
if (fb_alloc_cmap(&fb->cmap, NR_PALETTE, 0)) {
dev_err(info->dev, "failed to allocate cmap memory\n");
return -ENOMEM;
}
fb_set_cmap(&fb->cmap, fb);
ret = (fb->fbops->fb_check_var)(&fb->var, fb);
if (ret)
dev_err(info->dev, "check_var() failed on initial setup?\n");
return 0;
}
/* default platform data if none is supplied (ie, PCI device) */
static struct sm501_platdata_fbsub sm501fb_pdata_crt = {
.flags = (SM501FB_FLAG_USE_INIT_MODE |
SM501FB_FLAG_USE_HWCURSOR |
SM501FB_FLAG_USE_HWACCEL |
SM501FB_FLAG_DISABLE_AT_EXIT),
};
static struct sm501_platdata_fbsub sm501fb_pdata_pnl = {
.flags = (SM501FB_FLAG_USE_INIT_MODE |
SM501FB_FLAG_USE_HWCURSOR |
SM501FB_FLAG_USE_HWACCEL |
SM501FB_FLAG_DISABLE_AT_EXIT),
};
static struct sm501_platdata_fb sm501fb_def_pdata = {
.fb_route = SM501_FB_OWN,
.fb_crt = &sm501fb_pdata_crt,
.fb_pnl = &sm501fb_pdata_pnl,
};
static char driver_name_crt[] = "sm501fb-crt";
static char driver_name_pnl[] = "sm501fb-panel";
static int sm501fb_probe_one(struct sm501fb_info *info,
enum sm501_controller head)
{
unsigned char *name = (head == HEAD_CRT) ? "crt" : "panel";
struct sm501_platdata_fbsub *pd;
struct sm501fb_par *par;
struct fb_info *fbi;
pd = (head == HEAD_CRT) ? info->pdata->fb_crt : info->pdata->fb_pnl;
/* Do not initialise if we've not been given any platform data */
if (pd == NULL) {
dev_info(info->dev, "no data for fb %s (disabled)\n", name);
return 0;
}
fbi = framebuffer_alloc(sizeof(struct sm501fb_par), info->dev);
if (!fbi)
return -ENOMEM;
par = fbi->par;
par->info = info;
par->head = head;
fbi->pseudo_palette = &par->pseudo_palette;
info->fb[head] = fbi;
return 0;
}
/* Free up anything allocated by sm501fb_init_fb */
static void sm501_free_init_fb(struct sm501fb_info *info,
enum sm501_controller head)
{
struct fb_info *fbi = info->fb[head];
if (!fbi)
return;
fb_dealloc_cmap(&fbi->cmap);
}
static int sm501fb_start_one(struct sm501fb_info *info,
enum sm501_controller head, const char *drvname)
{
struct fb_info *fbi = info->fb[head];
int ret;
if (!fbi)
return 0;
mutex_init(&info->fb[head]->mm_lock);
ret = sm501fb_init_fb(info->fb[head], head, drvname);
if (ret) {
dev_err(info->dev, "cannot initialise fb %s\n", drvname);
return ret;
}
ret = register_framebuffer(info->fb[head]);
if (ret) {
dev_err(info->dev, "failed to register fb %s\n", drvname);
sm501_free_init_fb(info, head);
return ret;
}
dev_info(info->dev, "fb%d: %s frame buffer\n", fbi->node, fbi->fix.id);
return 0;
}
static int sm501fb_probe(struct platform_device *pdev)
{
struct sm501fb_info *info;
struct device *dev = &pdev->dev;
int ret;
/* allocate our framebuffers */
info = kzalloc(sizeof(*info), GFP_KERNEL);
if (!info) {
dev_err(dev, "failed to allocate state\n");
return -ENOMEM;
}
info->dev = dev = &pdev->dev;
platform_set_drvdata(pdev, info);
if (dev->parent->platform_data) {
struct sm501_platdata *pd = dev->parent->platform_data;
info->pdata = pd->fb;
}
if (info->pdata == NULL) {
int found = 0;
#if defined(CONFIG_OF)
struct device_node *np = pdev->dev.parent->of_node;
const u8 *prop;
const char *cp;
int len;
info->pdata = &sm501fb_def_pdata;
if (np) {
/* Get EDID */
cp = of_get_property(np, "mode", &len);
if (cp)
strcpy(fb_mode, cp);
prop = of_get_property(np, "edid", &len);
if (prop && len == EDID_LENGTH) {
info->edid_data = kmemdup(prop, EDID_LENGTH,
GFP_KERNEL);
if (info->edid_data)
found = 1;
}
}
#endif
if (!found) {
dev_info(dev, "using default configuration data\n");
info->pdata = &sm501fb_def_pdata;
}
}
/* probe for the presence of each panel */
ret = sm501fb_probe_one(info, HEAD_CRT);
if (ret < 0) {
dev_err(dev, "failed to probe CRT\n");
goto err_alloc;
}
ret = sm501fb_probe_one(info, HEAD_PANEL);
if (ret < 0) {
dev_err(dev, "failed to probe PANEL\n");
goto err_probed_crt;
}
if (info->fb[HEAD_PANEL] == NULL &&
info->fb[HEAD_CRT] == NULL) {
dev_err(dev, "no framebuffers found\n");
ret = -ENODEV;
goto err_alloc;
}
/* get the resources for both of the framebuffers */
ret = sm501fb_start(info, pdev);
if (ret) {
dev_err(dev, "cannot initialise SM501\n");
goto err_probed_panel;
}
ret = sm501fb_start_one(info, HEAD_CRT, driver_name_crt);
if (ret) {
dev_err(dev, "failed to start CRT\n");
goto err_started;
}
ret = sm501fb_start_one(info, HEAD_PANEL, driver_name_pnl);
if (ret) {
dev_err(dev, "failed to start Panel\n");
goto err_started_crt;
}
/* we registered, return ok */
return 0;
err_started_crt:
unregister_framebuffer(info->fb[HEAD_CRT]);
sm501_free_init_fb(info, HEAD_CRT);
err_started:
sm501fb_stop(info);
err_probed_panel:
framebuffer_release(info->fb[HEAD_PANEL]);
err_probed_crt:
framebuffer_release(info->fb[HEAD_CRT]);
err_alloc:
kfree(info);
return ret;
}
/*
* Cleanup
*/
static void sm501fb_remove(struct platform_device *pdev)
{
struct sm501fb_info *info = platform_get_drvdata(pdev);
struct fb_info *fbinfo_crt = info->fb[0];
struct fb_info *fbinfo_pnl = info->fb[1];
sm501_free_init_fb(info, HEAD_CRT);
sm501_free_init_fb(info, HEAD_PANEL);
if (fbinfo_crt)
unregister_framebuffer(fbinfo_crt);
if (fbinfo_pnl)
unregister_framebuffer(fbinfo_pnl);
sm501fb_stop(info);
kfree(info);
framebuffer_release(fbinfo_pnl);
framebuffer_release(fbinfo_crt);
}
#ifdef CONFIG_PM
static int sm501fb_suspend_fb(struct sm501fb_info *info,
enum sm501_controller head)
{
struct fb_info *fbi = info->fb[head];
struct sm501fb_par *par;
if (!fbi)
return 0;
par = fbi->par;
if (par->screen.size == 0)
return 0;
/* blank the relevant interface to ensure unit power minimised */
(par->ops.fb_blank)(FB_BLANK_POWERDOWN, fbi);
/* tell console/fb driver we are suspending */
console_lock();
fb_set_suspend(fbi, 1);
console_unlock();
/* backup copies in case chip is powered down over suspend */
par->store_fb = vmalloc(par->screen.size);
if (par->store_fb == NULL) {
dev_err(info->dev, "no memory to store screen\n");
return -ENOMEM;
}
par->store_cursor = vmalloc(par->cursor.size);
if (par->store_cursor == NULL) {
dev_err(info->dev, "no memory to store cursor\n");
goto err_nocursor;
}
dev_dbg(info->dev, "suspending screen to %p\n", par->store_fb);
dev_dbg(info->dev, "suspending cursor to %p\n", par->store_cursor);
memcpy_fromio(par->store_fb, par->screen.k_addr, par->screen.size);
memcpy_fromio(par->store_cursor, par->cursor.k_addr, par->cursor.size);
return 0;
err_nocursor:
vfree(par->store_fb);
par->store_fb = NULL;
return -ENOMEM;
}
static void sm501fb_resume_fb(struct sm501fb_info *info,
enum sm501_controller head)
{
struct fb_info *fbi = info->fb[head];
struct sm501fb_par *par;
if (!fbi)
return;
par = fbi->par;
if (par->screen.size == 0)
return;
/* re-activate the configuration */
(par->ops.fb_set_par)(fbi);
/* restore the data */
dev_dbg(info->dev, "restoring screen from %p\n", par->store_fb);
dev_dbg(info->dev, "restoring cursor from %p\n", par->store_cursor);
if (par->store_fb)
memcpy_toio(par->screen.k_addr, par->store_fb,
par->screen.size);
if (par->store_cursor)
memcpy_toio(par->cursor.k_addr, par->store_cursor,
par->cursor.size);
console_lock();
fb_set_suspend(fbi, 0);
console_unlock();
vfree(par->store_fb);
vfree(par->store_cursor);
}
/* suspend and resume support */
static int sm501fb_suspend(struct platform_device *pdev, pm_message_t state)
{
struct sm501fb_info *info = platform_get_drvdata(pdev);
/* store crt control to resume with */
info->pm_crt_ctrl = smc501_readl(info->regs + SM501_DC_CRT_CONTROL);
sm501fb_suspend_fb(info, HEAD_CRT);
sm501fb_suspend_fb(info, HEAD_PANEL);
/* turn off the clocks, in case the device is not powered down */
sm501_unit_power(info->dev->parent, SM501_GATE_DISPLAY, 0);
return 0;
}
#define SM501_CRT_CTRL_SAVE (SM501_DC_CRT_CONTROL_TVP | \
SM501_DC_CRT_CONTROL_SEL)
static int sm501fb_resume(struct platform_device *pdev)
{
struct sm501fb_info *info = platform_get_drvdata(pdev);
unsigned long crt_ctrl;
sm501_unit_power(info->dev->parent, SM501_GATE_DISPLAY, 1);
/* restore the items we want to be saved for crt control */
crt_ctrl = smc501_readl(info->regs + SM501_DC_CRT_CONTROL);
crt_ctrl &= ~SM501_CRT_CTRL_SAVE;
crt_ctrl |= info->pm_crt_ctrl & SM501_CRT_CTRL_SAVE;
smc501_writel(crt_ctrl, info->regs + SM501_DC_CRT_CONTROL);
sm501fb_resume_fb(info, HEAD_CRT);
sm501fb_resume_fb(info, HEAD_PANEL);
return 0;
}
#else
#define sm501fb_suspend NULL
#define sm501fb_resume NULL
#endif
static struct platform_driver sm501fb_driver = {
.probe = sm501fb_probe,
.remove_new = sm501fb_remove,
.suspend = sm501fb_suspend,
.resume = sm501fb_resume,
.driver = {
.name = "sm501-fb",
.dev_groups = sm501fb_groups,
},
};
module_platform_driver(sm501fb_driver);
module_param_named(mode, fb_mode, charp, 0);
MODULE_PARM_DESC(mode,
"Specify resolution as \"<xres>x<yres>[-<bpp>][@<refresh>]\" ");
module_param_named(bpp, default_bpp, ulong, 0);
MODULE_PARM_DESC(bpp, "Specify bit-per-pixel if not specified mode");
MODULE_AUTHOR("Ben Dooks, Vincent Sanders");
MODULE_DESCRIPTION("SM501 Framebuffer driver");
MODULE_LICENSE("GPL v2");
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