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linux/drivers/video/fbdev/carminefb.c
Thomas Zimmermann c64ded1703 fbdev/carminefb: Use fbdev I/O helpers 
Set struct fb_ops and with FB_DEFAULT_IOMEM_OPS, fbdev's initializer
for I/O memory. Sets the callbacks to the cfb_ and fb_io_ functions.
Select the correct modules with Kconfig's FB_IOMEM_HELPERS token.

The macro and token set the currently selected values, so there is
no functional change.

v3:
	* use _IOMEM_ in commit message
v2:
	* updated to use _IOMEM_ tokens

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Acked-by: Helge Deller <deller@gmx.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20230803184034.6456-7-tzimmermann@suse.de
2023-08-04 15:54:35 +02:00

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// SPDX-License-Identifier: GPL-2.0-only
/*
* Frame buffer driver for the Carmine GPU.
*
* The driver configures the GPU as follows
* - FB0 is display 0 with unique memory area
* - FB1 is display 1 with unique memory area
* - both display use 32 bit colors
*/
#include <linux/aperture.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/fb.h>
#include <linux/interrupt.h>
#include <linux/pci.h>
#include <linux/slab.h>
#include <linux/module.h>
#include "carminefb.h"
#include "carminefb_regs.h"
#if !defined(__LITTLE_ENDIAN) && !defined(__BIG_ENDIAN)
#error "The endianness of the target host has not been defined."
#endif
/*
* The initial video mode can be supplied via two different ways:
* - as a string that is passed to fb_find_mode() (module option fb_mode_str)
* - as an integer that picks the video mode from carmine_modedb[] (module
* option fb_mode)
*
* If nothing is used than the initial video mode will be the
* CARMINEFB_DEFAULT_VIDEO_MODE member of the carmine_modedb[].
*/
#define CARMINEFB_DEFAULT_VIDEO_MODE 1
static unsigned int fb_mode = CARMINEFB_DEFAULT_VIDEO_MODE;
module_param(fb_mode, uint, 0444);
MODULE_PARM_DESC(fb_mode, "Initial video mode as integer.");
static char *fb_mode_str;
module_param(fb_mode_str, charp, 0444);
MODULE_PARM_DESC(fb_mode_str, "Initial video mode in characters.");
/*
* Carminefb displays:
* 0b000 None
* 0b001 Display 0
* 0b010 Display 1
*/
static int fb_displays = CARMINE_USE_DISPLAY0 | CARMINE_USE_DISPLAY1;
module_param(fb_displays, int, 0444);
MODULE_PARM_DESC(fb_displays, "Bit mode, which displays are used");
struct carmine_hw {
void __iomem *v_regs;
void __iomem *screen_mem;
struct fb_info *fb[MAX_DISPLAY];
};
struct carmine_resolution {
u32 htp;
u32 hsp;
u32 hsw;
u32 hdp;
u32 vtr;
u32 vsp;
u32 vsw;
u32 vdp;
u32 disp_mode;
};
struct carmine_fb {
void __iomem *display_reg;
void __iomem *screen_base;
u32 smem_offset;
u32 cur_mode;
u32 new_mode;
struct carmine_resolution *res;
u32 pseudo_palette[16];
};
static struct fb_fix_screeninfo carminefb_fix = {
.id = "Carmine",
.type = FB_TYPE_PACKED_PIXELS,
.visual = FB_VISUAL_TRUECOLOR,
.accel = FB_ACCEL_NONE,
};
static const struct fb_videomode carmine_modedb[] = {
{
.name = "640x480",
.xres = 640,
.yres = 480,
}, {
.name = "800x600",
.xres = 800,
.yres = 600,
},
};
static struct carmine_resolution car_modes[] = {
{
/* 640x480 */
.htp = 800,
.hsp = 672,
.hsw = 96,
.hdp = 640,
.vtr = 525,
.vsp = 490,
.vsw = 2,
.vdp = 480,
.disp_mode = 0x1400,
},
{
/* 800x600 */
.htp = 1060,
.hsp = 864,
.hsw = 72,
.hdp = 800,
.vtr = 628,
.vsp = 601,
.vsw = 2,
.vdp = 600,
.disp_mode = 0x0d00,
}
};
static int carmine_find_mode(const struct fb_var_screeninfo *var)
{
int i;
for (i = 0; i < ARRAY_SIZE(car_modes); i++)
if (car_modes[i].hdp == var->xres &&
car_modes[i].vdp == var->yres)
return i;
return -EINVAL;
}
static void c_set_disp_reg(const struct carmine_fb *par,
u32 offset, u32 val)
{
writel(val, par->display_reg + offset);
}
static u32 c_get_disp_reg(const struct carmine_fb *par,
u32 offset)
{
return readl(par->display_reg + offset);
}
static void c_set_hw_reg(const struct carmine_hw *hw,
u32 offset, u32 val)
{
writel(val, hw->v_regs + offset);
}
static u32 c_get_hw_reg(const struct carmine_hw *hw,
u32 offset)
{
return readl(hw->v_regs + offset);
}
static int carmine_setcolreg(unsigned regno, unsigned red, unsigned green,
unsigned blue, unsigned transp, struct fb_info *info)
{
if (regno >= 16)
return 1;
red >>= 8;
green >>= 8;
blue >>= 8;
transp >>= 8;
((__be32 *)info->pseudo_palette)[regno] = cpu_to_be32(transp << 24 |
red << 0 | green << 8 | blue << 16);
return 0;
}
static int carmine_check_var(struct fb_var_screeninfo *var,
struct fb_info *info)
{
int ret;
ret = carmine_find_mode(var);
if (ret < 0)
return ret;
if (var->grayscale || var->rotate || var->nonstd)
return -EINVAL;
var->xres_virtual = var->xres;
var->yres_virtual = var->yres;
var->bits_per_pixel = 32;
#ifdef __BIG_ENDIAN
var->transp.offset = 24;
var->red.offset = 0;
var->green.offset = 8;
var->blue.offset = 16;
#else
var->transp.offset = 24;
var->red.offset = 16;
var->green.offset = 8;
var->blue.offset = 0;
#endif
var->red.length = 8;
var->green.length = 8;
var->blue.length = 8;
var->transp.length = 8;
var->red.msb_right = 0;
var->green.msb_right = 0;
var->blue.msb_right = 0;
var->transp.msb_right = 0;
return 0;
}
static void carmine_init_display_param(struct carmine_fb *par)
{
u32 width;
u32 height;
u32 param;
u32 window_size;
u32 soffset = par->smem_offset;
c_set_disp_reg(par, CARMINE_DISP_REG_C_TRANS, 0);
c_set_disp_reg(par, CARMINE_DISP_REG_MLMR_TRANS, 0);
c_set_disp_reg(par, CARMINE_DISP_REG_CURSOR_MODE,
CARMINE_CURSOR0_PRIORITY_MASK |
CARMINE_CURSOR1_PRIORITY_MASK |
CARMINE_CURSOR_CUTZ_MASK);
/* Set default cursor position */
c_set_disp_reg(par, CARMINE_DISP_REG_CUR1_POS, 0 << 16 | 0);
c_set_disp_reg(par, CARMINE_DISP_REG_CUR2_POS, 0 << 16 | 0);
/* Set default display mode */
c_set_disp_reg(par, CARMINE_DISP_REG_L0_EXT_MODE, CARMINE_WINDOW_MODE |
CARMINE_EXT_CMODE_DIRECT24_RGBA);
c_set_disp_reg(par, CARMINE_DISP_REG_L1_EXT_MODE,
CARMINE_EXT_CMODE_DIRECT24_RGBA);
c_set_disp_reg(par, CARMINE_DISP_REG_L2_EXT_MODE, CARMINE_EXTEND_MODE |
CARMINE_EXT_CMODE_DIRECT24_RGBA);
c_set_disp_reg(par, CARMINE_DISP_REG_L3_EXT_MODE, CARMINE_EXTEND_MODE |
CARMINE_EXT_CMODE_DIRECT24_RGBA);
c_set_disp_reg(par, CARMINE_DISP_REG_L4_EXT_MODE, CARMINE_EXTEND_MODE |
CARMINE_EXT_CMODE_DIRECT24_RGBA);
c_set_disp_reg(par, CARMINE_DISP_REG_L5_EXT_MODE, CARMINE_EXTEND_MODE |
CARMINE_EXT_CMODE_DIRECT24_RGBA);
c_set_disp_reg(par, CARMINE_DISP_REG_L6_EXT_MODE, CARMINE_EXTEND_MODE |
CARMINE_EXT_CMODE_DIRECT24_RGBA);
c_set_disp_reg(par, CARMINE_DISP_REG_L7_EXT_MODE, CARMINE_EXTEND_MODE |
CARMINE_EXT_CMODE_DIRECT24_RGBA);
/* Set default frame size to layer mode register */
width = par->res->hdp * 4 / CARMINE_DISP_WIDTH_UNIT;
width = width << CARMINE_DISP_WIDTH_SHIFT;
height = par->res->vdp - 1;
param = width | height;
c_set_disp_reg(par, CARMINE_DISP_REG_L0_MODE_W_H, param);
c_set_disp_reg(par, CARMINE_DISP_REG_L1_WIDTH, width);
c_set_disp_reg(par, CARMINE_DISP_REG_L2_MODE_W_H, param);
c_set_disp_reg(par, CARMINE_DISP_REG_L3_MODE_W_H, param);
c_set_disp_reg(par, CARMINE_DISP_REG_L4_MODE_W_H, param);
c_set_disp_reg(par, CARMINE_DISP_REG_L5_MODE_W_H, param);
c_set_disp_reg(par, CARMINE_DISP_REG_L6_MODE_W_H, param);
c_set_disp_reg(par, CARMINE_DISP_REG_L7_MODE_W_H, param);
/* Set default pos and size */
window_size = (par->res->vdp - 1) << CARMINE_DISP_WIN_H_SHIFT;
window_size |= par->res->hdp;
c_set_disp_reg(par, CARMINE_DISP_REG_L0_WIN_POS, 0);
c_set_disp_reg(par, CARMINE_DISP_REG_L0_WIN_SIZE, window_size);
c_set_disp_reg(par, CARMINE_DISP_REG_L1_WIN_POS, 0);
c_set_disp_reg(par, CARMINE_DISP_REG_L1_WIN_SIZE, window_size);
c_set_disp_reg(par, CARMINE_DISP_REG_L2_WIN_POS, 0);
c_set_disp_reg(par, CARMINE_DISP_REG_L2_WIN_SIZE, window_size);
c_set_disp_reg(par, CARMINE_DISP_REG_L3_WIN_POS, 0);
c_set_disp_reg(par, CARMINE_DISP_REG_L3_WIN_SIZE, window_size);
c_set_disp_reg(par, CARMINE_DISP_REG_L4_WIN_POS, 0);
c_set_disp_reg(par, CARMINE_DISP_REG_L4_WIN_SIZE, window_size);
c_set_disp_reg(par, CARMINE_DISP_REG_L5_WIN_POS, 0);
c_set_disp_reg(par, CARMINE_DISP_REG_L5_WIN_SIZE, window_size);
c_set_disp_reg(par, CARMINE_DISP_REG_L6_WIN_POS, 0);
c_set_disp_reg(par, CARMINE_DISP_REG_L6_WIN_SIZE, window_size);
c_set_disp_reg(par, CARMINE_DISP_REG_L7_WIN_POS, 0);
c_set_disp_reg(par, CARMINE_DISP_REG_L7_WIN_SIZE, window_size);
/* Set default origin address */
c_set_disp_reg(par, CARMINE_DISP_REG_L0_ORG_ADR, soffset);
c_set_disp_reg(par, CARMINE_DISP_REG_L1_ORG_ADR, soffset);
c_set_disp_reg(par, CARMINE_DISP_REG_L2_ORG_ADR1, soffset);
c_set_disp_reg(par, CARMINE_DISP_REG_L3_ORG_ADR1, soffset);
c_set_disp_reg(par, CARMINE_DISP_REG_L4_ORG_ADR1, soffset);
c_set_disp_reg(par, CARMINE_DISP_REG_L5_ORG_ADR1, soffset);
c_set_disp_reg(par, CARMINE_DISP_REG_L6_ORG_ADR1, soffset);
c_set_disp_reg(par, CARMINE_DISP_REG_L7_ORG_ADR1, soffset);
/* Set default display address */
c_set_disp_reg(par, CARMINE_DISP_REG_L0_DISP_ADR, soffset);
c_set_disp_reg(par, CARMINE_DISP_REG_L2_DISP_ADR1, soffset);
c_set_disp_reg(par, CARMINE_DISP_REG_L3_DISP_ADR1, soffset);
c_set_disp_reg(par, CARMINE_DISP_REG_L4_DISP_ADR1, soffset);
c_set_disp_reg(par, CARMINE_DISP_REG_L5_DISP_ADR1, soffset);
c_set_disp_reg(par, CARMINE_DISP_REG_L6_DISP_ADR0, soffset);
c_set_disp_reg(par, CARMINE_DISP_REG_L7_DISP_ADR0, soffset);
/* Set default display position */
c_set_disp_reg(par, CARMINE_DISP_REG_L0_DISP_POS, 0);
c_set_disp_reg(par, CARMINE_DISP_REG_L2_DISP_POS, 0);
c_set_disp_reg(par, CARMINE_DISP_REG_L3_DISP_POS, 0);
c_set_disp_reg(par, CARMINE_DISP_REG_L4_DISP_POS, 0);
c_set_disp_reg(par, CARMINE_DISP_REG_L5_DISP_POS, 0);
c_set_disp_reg(par, CARMINE_DISP_REG_L6_DISP_POS, 0);
c_set_disp_reg(par, CARMINE_DISP_REG_L7_DISP_POS, 0);
/* Set default blend mode */
c_set_disp_reg(par, CARMINE_DISP_REG_BLEND_MODE_L0, 0);
c_set_disp_reg(par, CARMINE_DISP_REG_BLEND_MODE_L1, 0);
c_set_disp_reg(par, CARMINE_DISP_REG_BLEND_MODE_L2, 0);
c_set_disp_reg(par, CARMINE_DISP_REG_BLEND_MODE_L3, 0);
c_set_disp_reg(par, CARMINE_DISP_REG_BLEND_MODE_L4, 0);
c_set_disp_reg(par, CARMINE_DISP_REG_BLEND_MODE_L5, 0);
c_set_disp_reg(par, CARMINE_DISP_REG_BLEND_MODE_L6, 0);
c_set_disp_reg(par, CARMINE_DISP_REG_BLEND_MODE_L7, 0);
/* default transparency mode */
c_set_disp_reg(par, CARMINE_DISP_REG_L0_TRANS, 0);
c_set_disp_reg(par, CARMINE_DISP_REG_L1_TRANS, 0);
c_set_disp_reg(par, CARMINE_DISP_REG_L2_TRANS, 0);
c_set_disp_reg(par, CARMINE_DISP_REG_L3_TRANS, 0);
c_set_disp_reg(par, CARMINE_DISP_REG_L4_TRANS, 0);
c_set_disp_reg(par, CARMINE_DISP_REG_L5_TRANS, 0);
c_set_disp_reg(par, CARMINE_DISP_REG_L6_TRANS, 0);
c_set_disp_reg(par, CARMINE_DISP_REG_L7_TRANS, 0);
/* Set default read skip parameter */
c_set_disp_reg(par, CARMINE_DISP_REG_L0RM, 0);
c_set_disp_reg(par, CARMINE_DISP_REG_L2RM, 0);
c_set_disp_reg(par, CARMINE_DISP_REG_L3RM, 0);
c_set_disp_reg(par, CARMINE_DISP_REG_L4RM, 0);
c_set_disp_reg(par, CARMINE_DISP_REG_L5RM, 0);
c_set_disp_reg(par, CARMINE_DISP_REG_L6RM, 0);
c_set_disp_reg(par, CARMINE_DISP_REG_L7RM, 0);
c_set_disp_reg(par, CARMINE_DISP_REG_L0PX, 0);
c_set_disp_reg(par, CARMINE_DISP_REG_L2PX, 0);
c_set_disp_reg(par, CARMINE_DISP_REG_L3PX, 0);
c_set_disp_reg(par, CARMINE_DISP_REG_L4PX, 0);
c_set_disp_reg(par, CARMINE_DISP_REG_L5PX, 0);
c_set_disp_reg(par, CARMINE_DISP_REG_L6PX, 0);
c_set_disp_reg(par, CARMINE_DISP_REG_L7PX, 0);
c_set_disp_reg(par, CARMINE_DISP_REG_L0PY, 0);
c_set_disp_reg(par, CARMINE_DISP_REG_L2PY, 0);
c_set_disp_reg(par, CARMINE_DISP_REG_L3PY, 0);
c_set_disp_reg(par, CARMINE_DISP_REG_L4PY, 0);
c_set_disp_reg(par, CARMINE_DISP_REG_L5PY, 0);
c_set_disp_reg(par, CARMINE_DISP_REG_L6PY, 0);
c_set_disp_reg(par, CARMINE_DISP_REG_L7PY, 0);
}
static void set_display_parameters(struct carmine_fb *par)
{
u32 mode;
u32 hdp, vdp, htp, hsp, hsw, vtr, vsp, vsw;
/*
* display timing. Parameters are decreased by one because hardware
* spec is 0 to (n - 1)
* */
hdp = par->res->hdp - 1;
vdp = par->res->vdp - 1;
htp = par->res->htp - 1;
hsp = par->res->hsp - 1;
hsw = par->res->hsw - 1;
vtr = par->res->vtr - 1;
vsp = par->res->vsp - 1;
vsw = par->res->vsw - 1;
c_set_disp_reg(par, CARMINE_DISP_REG_H_TOTAL,
htp << CARMINE_DISP_HTP_SHIFT);
c_set_disp_reg(par, CARMINE_DISP_REG_H_PERIOD,
(hdp << CARMINE_DISP_HDB_SHIFT) | hdp);
c_set_disp_reg(par, CARMINE_DISP_REG_V_H_W_H_POS,
(vsw << CARMINE_DISP_VSW_SHIFT) |
(hsw << CARMINE_DISP_HSW_SHIFT) |
(hsp));
c_set_disp_reg(par, CARMINE_DISP_REG_V_TOTAL,
vtr << CARMINE_DISP_VTR_SHIFT);
c_set_disp_reg(par, CARMINE_DISP_REG_V_PERIOD_POS,
(vdp << CARMINE_DISP_VDP_SHIFT) | vsp);
/* clock */
mode = c_get_disp_reg(par, CARMINE_DISP_REG_DCM1);
mode = (mode & ~CARMINE_DISP_DCM_MASK) |
(par->res->disp_mode & CARMINE_DISP_DCM_MASK);
/* enable video output and layer 0 */
mode |= CARMINE_DEN | CARMINE_L0E;
c_set_disp_reg(par, CARMINE_DISP_REG_DCM1, mode);
}
static int carmine_set_par(struct fb_info *info)
{
struct carmine_fb *par = info->par;
int ret;
ret = carmine_find_mode(&info->var);
if (ret < 0)
return ret;
par->new_mode = ret;
if (par->cur_mode != par->new_mode) {
par->cur_mode = par->new_mode;
par->res = &car_modes[par->new_mode];
carmine_init_display_param(par);
set_display_parameters(par);
}
info->fix.line_length = info->var.xres * info->var.bits_per_pixel / 8;
return 0;
}
static int init_hardware(struct carmine_hw *hw)
{
u32 flags;
u32 loops;
u32 ret;
/* Initialize Carmine */
/* Sets internal clock */
c_set_hw_reg(hw, CARMINE_CTL_REG + CARMINE_CTL_REG_CLOCK_ENABLE,
CARMINE_DFLT_IP_CLOCK_ENABLE);
/* Video signal output is turned off */
c_set_hw_reg(hw, CARMINE_DISP0_REG + CARMINE_DISP_REG_DCM1, 0);
c_set_hw_reg(hw, CARMINE_DISP1_REG + CARMINE_DISP_REG_DCM1, 0);
/* Software reset */
c_set_hw_reg(hw, CARMINE_CTL_REG + CARMINE_CTL_REG_SOFTWARE_RESET, 1);
c_set_hw_reg(hw, CARMINE_CTL_REG + CARMINE_CTL_REG_SOFTWARE_RESET, 0);
/* I/O mode settings */
flags = CARMINE_DFLT_IP_DCTL_IO_CONT1 << 16 |
CARMINE_DFLT_IP_DCTL_IO_CONT0;
c_set_hw_reg(hw, CARMINE_DCTL_REG + CARMINE_DCTL_REG_IOCONT1_IOCONT0,
flags);
/* DRAM initial sequence */
flags = CARMINE_DFLT_IP_DCTL_MODE << 16 | CARMINE_DFLT_IP_DCTL_ADD;
c_set_hw_reg(hw, CARMINE_DCTL_REG + CARMINE_DCTL_REG_MODE_ADD,
flags);
flags = CARMINE_DFLT_IP_DCTL_SET_TIME1 << 16 |
CARMINE_DFLT_IP_DCTL_EMODE;
c_set_hw_reg(hw, CARMINE_DCTL_REG + CARMINE_DCTL_REG_SETTIME1_EMODE,
flags);
flags = CARMINE_DFLT_IP_DCTL_REFRESH << 16 |
CARMINE_DFLT_IP_DCTL_SET_TIME2;
c_set_hw_reg(hw, CARMINE_DCTL_REG + CARMINE_DCTL_REG_REFRESH_SETTIME2,
flags);
flags = CARMINE_DFLT_IP_DCTL_RESERVE2 << 16 |
CARMINE_DFLT_IP_DCTL_FIFO_DEPTH;
c_set_hw_reg(hw, CARMINE_DCTL_REG + CARMINE_DCTL_REG_RSV2_RSV1, flags);
flags = CARMINE_DFLT_IP_DCTL_DDRIF2 << 16 | CARMINE_DFLT_IP_DCTL_DDRIF1;
c_set_hw_reg(hw, CARMINE_DCTL_REG + CARMINE_DCTL_REG_DDRIF2_DDRIF1,
flags);
flags = CARMINE_DFLT_IP_DCTL_RESERVE0 << 16 |
CARMINE_DFLT_IP_DCTL_STATES;
c_set_hw_reg(hw, CARMINE_DCTL_REG + CARMINE_DCTL_REG_RSV0_STATES,
flags);
/* Executes DLL reset */
if (CARMINE_DCTL_DLL_RESET) {
for (loops = 0; loops < CARMINE_DCTL_INIT_WAIT_LIMIT; loops++) {
ret = c_get_hw_reg(hw, CARMINE_DCTL_REG +
CARMINE_DCTL_REG_RSV0_STATES);
ret &= CARMINE_DCTL_REG_STATES_MASK;
if (!ret)
break;
mdelay(CARMINE_DCTL_INIT_WAIT_INTERVAL);
}
if (loops >= CARMINE_DCTL_INIT_WAIT_LIMIT) {
printk(KERN_ERR "DRAM init failed\n");
return -EIO;
}
}
flags = CARMINE_DFLT_IP_DCTL_MODE_AFT_RST << 16 |
CARMINE_DFLT_IP_DCTL_ADD;
c_set_hw_reg(hw, CARMINE_DCTL_REG + CARMINE_DCTL_REG_MODE_ADD, flags);
flags = CARMINE_DFLT_IP_DCTL_RESERVE0 << 16 |
CARMINE_DFLT_IP_DCTL_STATES_AFT_RST;
c_set_hw_reg(hw, CARMINE_DCTL_REG + CARMINE_DCTL_REG_RSV0_STATES,
flags);
/* Initialize the write back register */
c_set_hw_reg(hw, CARMINE_WB_REG + CARMINE_WB_REG_WBM,
CARMINE_WB_REG_WBM_DEFAULT);
/* Initialize the Kottos registers */
c_set_hw_reg(hw, CARMINE_GRAPH_REG + CARMINE_GRAPH_REG_VRINTM, 0);
c_set_hw_reg(hw, CARMINE_GRAPH_REG + CARMINE_GRAPH_REG_VRERRM, 0);
/* Set DC offsets */
c_set_hw_reg(hw, CARMINE_GRAPH_REG + CARMINE_GRAPH_REG_DC_OFFSET_PX, 0);
c_set_hw_reg(hw, CARMINE_GRAPH_REG + CARMINE_GRAPH_REG_DC_OFFSET_PY, 0);
c_set_hw_reg(hw, CARMINE_GRAPH_REG + CARMINE_GRAPH_REG_DC_OFFSET_LX, 0);
c_set_hw_reg(hw, CARMINE_GRAPH_REG + CARMINE_GRAPH_REG_DC_OFFSET_LY, 0);
c_set_hw_reg(hw, CARMINE_GRAPH_REG + CARMINE_GRAPH_REG_DC_OFFSET_TX, 0);
c_set_hw_reg(hw, CARMINE_GRAPH_REG + CARMINE_GRAPH_REG_DC_OFFSET_TY, 0);
return 0;
}
static const struct fb_ops carminefb_ops = {
.owner = THIS_MODULE,
FB_DEFAULT_IOMEM_OPS,
.fb_check_var = carmine_check_var,
.fb_set_par = carmine_set_par,
.fb_setcolreg = carmine_setcolreg,
};
static int alloc_carmine_fb(void __iomem *regs, void __iomem *smem_base,
int smem_offset, struct device *device,
struct fb_info **rinfo)
{
int ret;
struct fb_info *info;
struct carmine_fb *par;
info = framebuffer_alloc(sizeof *par, device);
if (!info)
return -ENOMEM;
par = info->par;
par->display_reg = regs;
par->smem_offset = smem_offset;
info->screen_base = smem_base + smem_offset;
info->screen_size = CARMINE_DISPLAY_MEM;
info->fbops = &carminefb_ops;
info->fix = carminefb_fix;
info->pseudo_palette = par->pseudo_palette;
ret = fb_alloc_cmap(&info->cmap, 256, 1);
if (ret < 0)
goto err_free_fb;
if (fb_mode >= ARRAY_SIZE(carmine_modedb))
fb_mode = CARMINEFB_DEFAULT_VIDEO_MODE;
par->cur_mode = par->new_mode = ~0;
ret = fb_find_mode(&info->var, info, fb_mode_str, carmine_modedb,
ARRAY_SIZE(carmine_modedb),
&carmine_modedb[fb_mode], 32);
if (!ret || ret == 4) {
ret = -EINVAL;
goto err_dealloc_cmap;
}
fb_videomode_to_modelist(carmine_modedb, ARRAY_SIZE(carmine_modedb),
&info->modelist);
ret = register_framebuffer(info);
if (ret < 0)
goto err_dealloc_cmap;
fb_info(info, "%s frame buffer device\n", info->fix.id);
*rinfo = info;
return 0;
err_dealloc_cmap:
fb_dealloc_cmap(&info->cmap);
err_free_fb:
framebuffer_release(info);
return ret;
}
static void cleanup_fb_device(struct fb_info *info)
{
if (info) {
unregister_framebuffer(info);
fb_dealloc_cmap(&info->cmap);
framebuffer_release(info);
}
}
static int carminefb_probe(struct pci_dev *dev, const struct pci_device_id *ent)
{
struct carmine_hw *hw;
struct device *device = &dev->dev;
struct fb_info *info;
int ret;
ret = aperture_remove_conflicting_pci_devices(dev, "carminefb");
if (ret)
return ret;
ret = pci_enable_device(dev);
if (ret)
return ret;
ret = -ENOMEM;
hw = kzalloc(sizeof *hw, GFP_KERNEL);
if (!hw)
goto err_enable_pci;
carminefb_fix.mmio_start = pci_resource_start(dev, CARMINE_CONFIG_BAR);
carminefb_fix.mmio_len = pci_resource_len(dev, CARMINE_CONFIG_BAR);
if (!request_mem_region(carminefb_fix.mmio_start,
carminefb_fix.mmio_len,
"carminefb regbase")) {
printk(KERN_ERR "carminefb: Can't reserve regbase.\n");
ret = -EBUSY;
goto err_free_hw;
}
hw->v_regs = ioremap(carminefb_fix.mmio_start,
carminefb_fix.mmio_len);
if (!hw->v_regs) {
printk(KERN_ERR "carminefb: Can't remap %s register.\n",
carminefb_fix.id);
goto err_free_reg_mmio;
}
carminefb_fix.smem_start = pci_resource_start(dev, CARMINE_MEMORY_BAR);
carminefb_fix.smem_len = pci_resource_len(dev, CARMINE_MEMORY_BAR);
/* The memory area tends to be very large (256 MiB). Remap only what
* is required for that largest resolution to avoid remaps at run
* time
*/
if (carminefb_fix.smem_len > CARMINE_TOTAL_DIPLAY_MEM)
carminefb_fix.smem_len = CARMINE_TOTAL_DIPLAY_MEM;
else if (carminefb_fix.smem_len < CARMINE_TOTAL_DIPLAY_MEM) {
printk(KERN_ERR "carminefb: Memory bar is only %d bytes, %d "
"are required.", carminefb_fix.smem_len,
CARMINE_TOTAL_DIPLAY_MEM);
goto err_unmap_vregs;
}
if (!request_mem_region(carminefb_fix.smem_start,
carminefb_fix.smem_len, "carminefb smem")) {
printk(KERN_ERR "carminefb: Can't reserve smem.\n");
goto err_unmap_vregs;
}
hw->screen_mem = ioremap(carminefb_fix.smem_start,
carminefb_fix.smem_len);
if (!hw->screen_mem) {
printk(KERN_ERR "carmine: Can't ioremap smem area.\n");
goto err_reg_smem;
}
ret = init_hardware(hw);
if (ret)
goto err_unmap_screen;
info = NULL;
if (fb_displays & CARMINE_USE_DISPLAY0) {
ret = alloc_carmine_fb(hw->v_regs + CARMINE_DISP0_REG,
hw->screen_mem, CARMINE_DISPLAY_MEM * 0,
device, &info);
if (ret)
goto err_deinit_hw;
}
hw->fb[0] = info;
info = NULL;
if (fb_displays & CARMINE_USE_DISPLAY1) {
ret = alloc_carmine_fb(hw->v_regs + CARMINE_DISP1_REG,
hw->screen_mem, CARMINE_DISPLAY_MEM * 1,
device, &info);
if (ret)
goto err_cleanup_fb0;
}
hw->fb[1] = info;
info = NULL;
pci_set_drvdata(dev, hw);
return 0;
err_cleanup_fb0:
cleanup_fb_device(hw->fb[0]);
err_deinit_hw:
/* disable clock, etc */
c_set_hw_reg(hw, CARMINE_CTL_REG + CARMINE_CTL_REG_CLOCK_ENABLE, 0);
err_unmap_screen:
iounmap(hw->screen_mem);
err_reg_smem:
release_mem_region(carminefb_fix.smem_start, carminefb_fix.smem_len);
err_unmap_vregs:
iounmap(hw->v_regs);
err_free_reg_mmio:
release_mem_region(carminefb_fix.mmio_start, carminefb_fix.mmio_len);
err_free_hw:
kfree(hw);
err_enable_pci:
pci_disable_device(dev);
return ret;
}
static void carminefb_remove(struct pci_dev *dev)
{
struct carmine_hw *hw = pci_get_drvdata(dev);
struct fb_fix_screeninfo fix;
int i;
/* in case we use only fb1 and not fb1 */
if (hw->fb[0])
fix = hw->fb[0]->fix;
else
fix = hw->fb[1]->fix;
/* deactivate display(s) and switch clocks */
c_set_hw_reg(hw, CARMINE_DISP0_REG + CARMINE_DISP_REG_DCM1, 0);
c_set_hw_reg(hw, CARMINE_DISP1_REG + CARMINE_DISP_REG_DCM1, 0);
c_set_hw_reg(hw, CARMINE_CTL_REG + CARMINE_CTL_REG_CLOCK_ENABLE, 0);
for (i = 0; i < MAX_DISPLAY; i++)
cleanup_fb_device(hw->fb[i]);
iounmap(hw->screen_mem);
release_mem_region(fix.smem_start, fix.smem_len);
iounmap(hw->v_regs);
release_mem_region(fix.mmio_start, fix.mmio_len);
pci_disable_device(dev);
kfree(hw);
}
#define PCI_VENDOR_ID_FUJITU_LIMITED 0x10cf
static struct pci_device_id carmine_devices[] = {
{
PCI_DEVICE(PCI_VENDOR_ID_FUJITU_LIMITED, 0x202b)},
{0, 0, 0, 0, 0, 0, 0}
};
MODULE_DEVICE_TABLE(pci, carmine_devices);
static struct pci_driver carmine_pci_driver = {
.name = "carminefb",
.id_table = carmine_devices,
.probe = carminefb_probe,
.remove = carminefb_remove,
};
static int __init carminefb_init(void)
{
if (fb_modesetting_disabled("carminefb"))
return -ENODEV;
if (!(fb_displays &
(CARMINE_USE_DISPLAY0 | CARMINE_USE_DISPLAY1))) {
printk(KERN_ERR "If you disable both displays than you don't "
"need the driver at all\n");
return -EINVAL;
}
return pci_register_driver(&carmine_pci_driver);
}
module_init(carminefb_init);
static void __exit carminefb_cleanup(void)
{
pci_unregister_driver(&carmine_pci_driver);
}
module_exit(carminefb_cleanup);
MODULE_AUTHOR("Sebastian Siewior <bigeasy@linutronix.de>");
MODULE_DESCRIPTION("Framebuffer driver for Fujitsu Carmine based devices");
MODULE_LICENSE("GPL v2");
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