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![Tejun Heo](/assets/img/avatar_default.png)
percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
749 lines
18 KiB
C
749 lines
18 KiB
C
/*
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* linux/drivers/video/epson1355fb.c -- Epson S1D13505 frame buffer for 2.5.
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*
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* Epson Research S1D13505 Embedded RAMDAC LCD/CRT Controller
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* (previously known as SED1355)
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*
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* Cf. http://www.erd.epson.com/vdc/html/S1D13505.html
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*
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*
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* Copyright (C) Hewlett-Packard Company. All rights reserved.
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*
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* Written by Christopher Hoover <ch@hpl.hp.com>
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*
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* Adapted from:
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*
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* linux/drivers/video/skeletonfb.c
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* Modified to new api Jan 2001 by James Simmons (jsimmons@infradead.org)
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* Created 28 Dec 1997 by Geert Uytterhoeven
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*
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* linux/drivers/video/epson1355fb.c (2.4 driver)
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* Copyright (C) 2000 Philipp Rumpf <prumpf@tux.org>
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file COPYING in the main directory of this archive for
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* more details.
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*
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*
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* Noteworthy Issues
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* -----------------
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*
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* This driver is complicated by the fact that this is a 16-bit chip
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* and, on at least one platform (ceiva), we can only do 16-bit reads
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* and writes to the framebuffer. We hide this from user space
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* except in the case of mmap().
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*
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*
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* To Do
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* -----
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*
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* - Test 8-bit pseudocolor mode
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* - Allow setting bpp, virtual resolution
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* - Implement horizontal panning
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* - (maybe) Implement hardware cursor
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/string.h>
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#include <linux/mm.h>
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#include <linux/delay.h>
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#include <linux/fb.h>
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#include <linux/init.h>
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#include <linux/ioport.h>
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#include <linux/platform_device.h>
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#include <asm/types.h>
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#include <asm/io.h>
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#include <linux/uaccess.h>
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#include <video/epson1355.h>
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struct epson1355_par {
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unsigned long reg_addr;
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u32 pseudo_palette[16];
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};
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/* ------------------------------------------------------------------------- */
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#if defined(CONFIG_ARM)
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# ifdef CONFIG_ARCH_CEIVA
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# include <mach/hardware.h>
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# define EPSON1355FB_BASE_PHYS (CEIVA_PHYS_SED1355)
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# endif
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static inline u8 epson1355_read_reg(struct epson1355_par *par, int index)
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{
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return __raw_readb(par->reg_addr + index);
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}
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static inline void epson1355_write_reg(struct epson1355_par *par, u8 data, int index)
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{
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__raw_writeb(data, par->reg_addr + index);
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}
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#else
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# error "no architecture-specific epson1355_{read,write}_reg"
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#endif
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#ifndef EPSON1355FB_BASE_PHYS
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# error "EPSON1355FB_BASE_PHYS is not defined"
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#endif
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#define EPSON1355FB_REGS_OFS (0)
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#define EPSON1355FB_REGS_PHYS (EPSON1355FB_BASE_PHYS + EPSON1355FB_REGS_OFS)
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#define EPSON1355FB_REGS_LEN (64)
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#define EPSON1355FB_FB_OFS (0x00200000)
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#define EPSON1355FB_FB_PHYS (EPSON1355FB_BASE_PHYS + EPSON1355FB_FB_OFS)
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#define EPSON1355FB_FB_LEN (2 * 1024 * 1024)
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/* ------------------------------------------------------------------------- */
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static inline u16 epson1355_read_reg16(struct epson1355_par *par, int index)
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{
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u8 lo = epson1355_read_reg(par, index);
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u8 hi = epson1355_read_reg(par, index + 1);
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return (hi << 8) | lo;
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}
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static inline void epson1355_write_reg16(struct epson1355_par *par, u16 data, int index)
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{
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u8 lo = data & 0xff;
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u8 hi = (data >> 8) & 0xff;
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epson1355_write_reg(par, lo, index);
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epson1355_write_reg(par, hi, index + 1);
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}
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static inline u32 epson1355_read_reg20(struct epson1355_par *par, int index)
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{
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u8 b0 = epson1355_read_reg(par, index);
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u8 b1 = epson1355_read_reg(par, index + 1);
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u8 b2 = epson1355_read_reg(par, index + 2);
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return (b2 & 0x0f) << 16 | (b1 << 8) | b0;
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}
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static inline void epson1355_write_reg20(struct epson1355_par *par, u32 data, int index)
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{
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u8 b0 = data & 0xff;
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u8 b1 = (data >> 8) & 0xff;
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u8 b2 = (data >> 16) & 0x0f;
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epson1355_write_reg(par, b0, index);
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epson1355_write_reg(par, b1, index + 1);
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epson1355_write_reg(par, b2, index + 2);
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}
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/* ------------------------------------------------------------------------- */
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static void set_lut(struct epson1355_par *par, u8 index, u8 r, u8 g, u8 b)
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{
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epson1355_write_reg(par, index, REG_LUT_ADDR);
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epson1355_write_reg(par, r, REG_LUT_DATA);
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epson1355_write_reg(par, g, REG_LUT_DATA);
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epson1355_write_reg(par, b, REG_LUT_DATA);
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}
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/**
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* epson1355fb_setcolreg - sets a color register.
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* @regno: Which register in the CLUT we are programming
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* @red: The red value which can be up to 16 bits wide
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* @green: The green value which can be up to 16 bits wide
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* @blue: The blue value which can be up to 16 bits wide.
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* @transp: If supported the alpha value which can be up to 16 bits wide.
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* @info: frame buffer info structure
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*
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* Returns negative errno on error, or zero on success.
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*/
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static int epson1355fb_setcolreg(unsigned regno, unsigned r, unsigned g,
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unsigned b, unsigned transp,
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struct fb_info *info)
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{
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struct epson1355_par *par = info->par;
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if (info->var.grayscale)
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r = g = b = (19595 * r + 38470 * g + 7471 * b) >> 16;
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switch (info->fix.visual) {
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case FB_VISUAL_TRUECOLOR:
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if (regno >= 16)
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return -EINVAL;
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((u32 *) info->pseudo_palette)[regno] =
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(r & 0xf800) | (g & 0xfc00) >> 5 | (b & 0xf800) >> 11;
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break;
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case FB_VISUAL_PSEUDOCOLOR:
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if (regno >= 256)
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return -EINVAL;
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set_lut(par, regno, r >> 8, g >> 8, b >> 8);
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break;
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default:
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return -ENOSYS;
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}
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return 0;
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}
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/* ------------------------------------------------------------------------- */
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/**
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* epson1355fb_pan_display - Pans the display.
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* @var: frame buffer variable screen structure
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* @info: frame buffer structure that represents a single frame buffer
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*
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* Pan (or wrap, depending on the `vmode' field) the display using the
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* `xoffset' and `yoffset' fields of the `var' structure.
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* If the values don't fit, return -EINVAL.
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*
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* Returns negative errno on error, or zero on success.
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*/
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static int epson1355fb_pan_display(struct fb_var_screeninfo *var,
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struct fb_info *info)
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{
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struct epson1355_par *par = info->par;
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u32 start;
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if (var->xoffset != 0) /* not yet ... */
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return -EINVAL;
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if (var->yoffset + info->var.yres > info->var.yres_virtual)
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return -EINVAL;
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start = (info->fix.line_length >> 1) * var->yoffset;
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epson1355_write_reg20(par, start, REG_SCRN1_DISP_START_ADDR0);
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return 0;
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}
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/* ------------------------------------------------------------------------- */
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static void lcd_enable(struct epson1355_par *par, int enable)
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{
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u8 mode = epson1355_read_reg(par, REG_DISPLAY_MODE);
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if (enable)
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mode |= 1;
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else
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mode &= ~1;
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epson1355_write_reg(par, mode, REG_DISPLAY_MODE);
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}
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#if defined(CONFIG_ARCH_CEIVA)
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static void backlight_enable(int enable)
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{
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/* ### this should be protected by a spinlock ... */
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u8 pddr = clps_readb(PDDR);
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if (enable)
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pddr |= (1 << 5);
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else
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pddr &= ~(1 << 5);
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clps_writeb(pddr, PDDR);
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}
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#else
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static void backlight_enable(int enable)
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{
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}
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#endif
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/**
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* epson1355fb_blank - blanks the display.
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* @blank_mode: the blank mode we want.
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* @info: frame buffer structure that represents a single frame buffer
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*
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* Blank the screen if blank_mode != 0, else unblank. Return 0 if
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* blanking succeeded, != 0 if un-/blanking failed due to e.g. a
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* video mode which doesn't support it. Implements VESA suspend
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* and powerdown modes on hardware that supports disabling hsync/vsync:
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* blank_mode == 2: suspend vsync
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* blank_mode == 3: suspend hsync
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* blank_mode == 4: powerdown
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*
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* Returns negative errno on error, or zero on success.
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*
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*/
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static int epson1355fb_blank(int blank_mode, struct fb_info *info)
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{
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struct epson1355_par *par = info->par;
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switch (blank_mode) {
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case FB_BLANK_UNBLANK:
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case FB_BLANK_NORMAL:
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lcd_enable(par, 1);
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backlight_enable(1);
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break;
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case FB_BLANK_VSYNC_SUSPEND:
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case FB_BLANK_HSYNC_SUSPEND:
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backlight_enable(0);
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break;
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case FB_BLANK_POWERDOWN:
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backlight_enable(0);
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lcd_enable(par, 0);
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break;
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default:
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return -EINVAL;
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}
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/* let fbcon do a soft blank for us */
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return (blank_mode == FB_BLANK_NORMAL) ? 1 : 0;
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}
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/* ------------------------------------------------------------------------- */
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/*
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* We can't use the cfb generic routines, as we have to limit
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* ourselves to 16-bit or 8-bit loads and stores to this 16-bit
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* chip.
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*/
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static inline void epson1355fb_fb_writel(unsigned long v, unsigned long *a)
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{
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u16 *p = (u16 *) a;
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u16 l = v & 0xffff;
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u16 h = v >> 16;
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fb_writew(l, p);
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fb_writew(h, p + 1);
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}
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static inline unsigned long epson1355fb_fb_readl(const unsigned long *a)
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{
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const u16 *p = (u16 *) a;
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u16 l = fb_readw(p);
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u16 h = fb_readw(p + 1);
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return (h << 16) | l;
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}
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#define FB_READL epson1355fb_fb_readl
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#define FB_WRITEL epson1355fb_fb_writel
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/* ------------------------------------------------------------------------- */
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static inline unsigned long copy_from_user16(void *to, const void *from,
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unsigned long n)
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{
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u16 *dst = (u16 *) to;
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u16 *src = (u16 *) from;
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if (!access_ok(VERIFY_READ, from, n))
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return n;
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while (n > 1) {
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u16 v;
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if (__get_user(v, src))
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return n;
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fb_writew(v, dst);
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src++, dst++;
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n -= 2;
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}
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if (n) {
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u8 v;
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if (__get_user(v, ((u8 *) src)))
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return n;
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fb_writeb(v, dst);
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}
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return 0;
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}
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static inline unsigned long copy_to_user16(void *to, const void *from,
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unsigned long n)
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{
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u16 *dst = (u16 *) to;
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u16 *src = (u16 *) from;
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if (!access_ok(VERIFY_WRITE, to, n))
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return n;
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while (n > 1) {
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u16 v = fb_readw(src);
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if (__put_user(v, dst))
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return n;
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src++, dst++;
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n -= 2;
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}
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if (n) {
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u8 v = fb_readb(src);
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if (__put_user(v, ((u8 *) dst)))
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return n;
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}
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return 0;
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}
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static ssize_t
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epson1355fb_read(struct fb_info *info, char *buf, size_t count, loff_t * ppos)
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{
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unsigned long p = *ppos;
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if (p >= info->fix.smem_len)
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return 0;
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if (count >= info->fix.smem_len)
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count = info->fix.smem_len;
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if (count + p > info->fix.smem_len)
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count = info->fix.smem_len - p;
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if (count) {
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char *base_addr;
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base_addr = info->screen_base;
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count -= copy_to_user16(buf, base_addr + p, count);
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if (!count)
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return -EFAULT;
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*ppos += count;
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}
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return count;
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}
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static ssize_t
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epson1355fb_write(struct fb_info *info, const char *buf,
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size_t count, loff_t * ppos)
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{
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unsigned long p = *ppos;
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int err;
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/* from fbmem.c except for our own copy_*_user */
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if (p > info->fix.smem_len)
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return -ENOSPC;
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if (count >= info->fix.smem_len)
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count = info->fix.smem_len;
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err = 0;
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if (count + p > info->fix.smem_len) {
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count = info->fix.smem_len - p;
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err = -ENOSPC;
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}
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if (count) {
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char *base_addr;
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base_addr = info->screen_base;
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count -= copy_from_user16(base_addr + p, buf, count);
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*ppos += count;
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err = -EFAULT;
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}
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if (count)
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return count;
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return err;
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}
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/* ------------------------------------------------------------------------- */
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static struct fb_ops epson1355fb_fbops = {
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.owner = THIS_MODULE,
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.fb_setcolreg = epson1355fb_setcolreg,
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.fb_pan_display = epson1355fb_pan_display,
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.fb_blank = epson1355fb_blank,
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.fb_fillrect = cfb_fillrect,
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.fb_copyarea = cfb_copyarea,
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.fb_imageblit = cfb_imageblit,
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.fb_read = epson1355fb_read,
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.fb_write = epson1355fb_write,
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};
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/* ------------------------------------------------------------------------- */
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static __init unsigned int get_fb_size(struct fb_info *info)
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{
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unsigned int size = 2 * 1024 * 1024;
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char *p = info->screen_base;
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|
|
/* the 512k framebuffer is aliased at start + 0x80000 * n */
|
|
fb_writeb(1, p);
|
|
fb_writeb(0, p + 0x80000);
|
|
if (!fb_readb(p))
|
|
size = 512 * 1024;
|
|
|
|
fb_writeb(0, p);
|
|
|
|
return size;
|
|
}
|
|
|
|
static int epson1355_width_tab[2][4] __initdata =
|
|
{ {4, 8, 16, -1}, {9, 12, 16, -1} };
|
|
static int epson1355_bpp_tab[8] __initdata = { 1, 2, 4, 8, 15, 16 };
|
|
|
|
static void __init fetch_hw_state(struct fb_info *info, struct epson1355_par *par)
|
|
{
|
|
struct fb_var_screeninfo *var = &info->var;
|
|
struct fb_fix_screeninfo *fix = &info->fix;
|
|
u8 panel, display;
|
|
u16 offset;
|
|
u32 xres, yres;
|
|
u32 xres_virtual, yres_virtual;
|
|
int bpp, lcd_bpp;
|
|
int is_color, is_dual, is_tft;
|
|
int lcd_enabled, crt_enabled;
|
|
|
|
fix->type = FB_TYPE_PACKED_PIXELS;
|
|
|
|
display = epson1355_read_reg(par, REG_DISPLAY_MODE);
|
|
bpp = epson1355_bpp_tab[(display >> 2) & 7];
|
|
|
|
switch (bpp) {
|
|
case 8:
|
|
fix->visual = FB_VISUAL_PSEUDOCOLOR;
|
|
var->bits_per_pixel = 8;
|
|
var->red.offset = var->green.offset = var->blue.offset = 0;
|
|
var->red.length = var->green.length = var->blue.length = 8;
|
|
break;
|
|
case 16:
|
|
/* 5-6-5 RGB */
|
|
fix->visual = FB_VISUAL_TRUECOLOR;
|
|
var->bits_per_pixel = 16;
|
|
var->red.offset = 11;
|
|
var->red.length = 5;
|
|
var->green.offset = 5;
|
|
var->green.length = 6;
|
|
var->blue.offset = 0;
|
|
var->blue.length = 5;
|
|
break;
|
|
default:
|
|
BUG();
|
|
}
|
|
fb_alloc_cmap(&(info->cmap), 256, 0);
|
|
|
|
panel = epson1355_read_reg(par, REG_PANEL_TYPE);
|
|
is_color = (panel & 0x04) != 0;
|
|
is_dual = (panel & 0x02) != 0;
|
|
is_tft = (panel & 0x01) != 0;
|
|
crt_enabled = (display & 0x02) != 0;
|
|
lcd_enabled = (display & 0x01) != 0;
|
|
lcd_bpp = epson1355_width_tab[is_tft][(panel >> 4) & 3];
|
|
|
|
xres = (epson1355_read_reg(par, REG_HORZ_DISP_WIDTH) + 1) * 8;
|
|
yres = (epson1355_read_reg16(par, REG_VERT_DISP_HEIGHT0) + 1) *
|
|
((is_dual && !crt_enabled) ? 2 : 1);
|
|
offset = epson1355_read_reg16(par, REG_MEM_ADDR_OFFSET0) & 0x7ff;
|
|
xres_virtual = offset * 16 / bpp;
|
|
yres_virtual = fix->smem_len / (offset * 2);
|
|
|
|
var->xres = xres;
|
|
var->yres = yres;
|
|
var->xres_virtual = xres_virtual;
|
|
var->yres_virtual = yres_virtual;
|
|
var->xoffset = var->yoffset = 0;
|
|
|
|
fix->line_length = offset * 2;
|
|
|
|
fix->xpanstep = 0; /* no pan yet */
|
|
fix->ypanstep = 1;
|
|
fix->ywrapstep = 0;
|
|
fix->accel = FB_ACCEL_NONE;
|
|
|
|
var->grayscale = !is_color;
|
|
|
|
#ifdef DEBUG
|
|
printk(KERN_INFO
|
|
"epson1355fb: xres=%d, yres=%d, "
|
|
"is_color=%d, is_dual=%d, is_tft=%d\n",
|
|
xres, yres, is_color, is_dual, is_tft);
|
|
printk(KERN_INFO
|
|
"epson1355fb: bpp=%d, lcd_bpp=%d, "
|
|
"crt_enabled=%d, lcd_enabled=%d\n",
|
|
bpp, lcd_bpp, crt_enabled, lcd_enabled);
|
|
#endif
|
|
}
|
|
|
|
|
|
static void clearfb16(struct fb_info *info)
|
|
{
|
|
u16 *dst = (u16 *) info->screen_base;
|
|
unsigned long n = info->fix.smem_len;
|
|
|
|
while (n > 1) {
|
|
fb_writew(0, dst);
|
|
dst++, n -= 2;
|
|
}
|
|
|
|
if (n)
|
|
fb_writeb(0, dst);
|
|
}
|
|
|
|
static int epson1355fb_remove(struct platform_device *dev)
|
|
{
|
|
struct fb_info *info = platform_get_drvdata(dev);
|
|
struct epson1355_par *par = info->par;
|
|
|
|
backlight_enable(0);
|
|
if (par) {
|
|
lcd_enable(par, 0);
|
|
if (par && par->reg_addr)
|
|
iounmap((void *) par->reg_addr);
|
|
}
|
|
|
|
if (info) {
|
|
fb_dealloc_cmap(&info->cmap);
|
|
if (info->screen_base)
|
|
iounmap(info->screen_base);
|
|
framebuffer_release(info);
|
|
}
|
|
release_mem_region(EPSON1355FB_FB_PHYS, EPSON1355FB_FB_LEN);
|
|
release_mem_region(EPSON1355FB_REGS_PHYS, EPSON1355FB_REGS_LEN);
|
|
return 0;
|
|
}
|
|
|
|
int __devinit epson1355fb_probe(struct platform_device *dev)
|
|
{
|
|
struct epson1355_par *default_par;
|
|
struct fb_info *info;
|
|
u8 revision;
|
|
int rc = 0;
|
|
|
|
if (!request_mem_region(EPSON1355FB_REGS_PHYS, EPSON1355FB_REGS_LEN, "S1D13505 registers")) {
|
|
printk(KERN_ERR "epson1355fb: unable to reserve "
|
|
"registers at 0x%0x\n", EPSON1355FB_REGS_PHYS);
|
|
rc = -EBUSY;
|
|
goto bail;
|
|
}
|
|
|
|
if (!request_mem_region(EPSON1355FB_FB_PHYS, EPSON1355FB_FB_LEN,
|
|
"S1D13505 framebuffer")) {
|
|
printk(KERN_ERR "epson1355fb: unable to reserve "
|
|
"framebuffer at 0x%0x\n", EPSON1355FB_FB_PHYS);
|
|
rc = -EBUSY;
|
|
goto bail;
|
|
}
|
|
|
|
info = framebuffer_alloc(sizeof(struct epson1355_par), &dev->dev);
|
|
if (!info) {
|
|
rc = -ENOMEM;
|
|
goto bail;
|
|
}
|
|
|
|
default_par = info->par;
|
|
default_par->reg_addr = (unsigned long) ioremap(EPSON1355FB_REGS_PHYS, EPSON1355FB_REGS_LEN);
|
|
if (!default_par->reg_addr) {
|
|
printk(KERN_ERR "epson1355fb: unable to map registers\n");
|
|
rc = -ENOMEM;
|
|
goto bail;
|
|
}
|
|
info->pseudo_palette = default_par->pseudo_palette;
|
|
|
|
info->screen_base = ioremap(EPSON1355FB_FB_PHYS, EPSON1355FB_FB_LEN);
|
|
if (!info->screen_base) {
|
|
printk(KERN_ERR "epson1355fb: unable to map framebuffer\n");
|
|
rc = -ENOMEM;
|
|
goto bail;
|
|
}
|
|
|
|
revision = epson1355_read_reg(default_par, REG_REVISION_CODE);
|
|
if ((revision >> 2) != 3) {
|
|
printk(KERN_INFO "epson1355fb: epson1355 not found\n");
|
|
rc = -ENODEV;
|
|
goto bail;
|
|
}
|
|
|
|
info->fix.mmio_start = EPSON1355FB_REGS_PHYS;
|
|
info->fix.mmio_len = EPSON1355FB_REGS_LEN;
|
|
info->fix.smem_start = EPSON1355FB_FB_PHYS;
|
|
info->fix.smem_len = get_fb_size(info);
|
|
|
|
printk(KERN_INFO "epson1355fb: regs mapped at 0x%lx, fb %d KiB mapped at 0x%p\n",
|
|
default_par->reg_addr, info->fix.smem_len / 1024, info->screen_base);
|
|
|
|
strcpy(info->fix.id, "S1D13505");
|
|
info->par = default_par;
|
|
info->fbops = &epson1355fb_fbops;
|
|
info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN;
|
|
|
|
/* we expect the boot loader to have initialized the chip
|
|
with appropriate parameters from which we can determinte
|
|
the flavor of lcd panel attached */
|
|
fetch_hw_state(info, default_par);
|
|
|
|
/* turn this puppy on ... */
|
|
clearfb16(info);
|
|
backlight_enable(1);
|
|
lcd_enable(default_par, 1);
|
|
|
|
if (register_framebuffer(info) < 0) {
|
|
rc = -EINVAL;
|
|
goto bail;
|
|
}
|
|
/*
|
|
* Our driver data.
|
|
*/
|
|
platform_set_drvdata(dev, info);
|
|
|
|
printk(KERN_INFO "fb%d: %s frame buffer device\n",
|
|
info->node, info->fix.id);
|
|
|
|
return 0;
|
|
|
|
bail:
|
|
epson1355fb_remove(dev);
|
|
return rc;
|
|
}
|
|
|
|
static struct platform_driver epson1355fb_driver = {
|
|
.probe = epson1355fb_probe,
|
|
.remove = epson1355fb_remove,
|
|
.driver = {
|
|
.name = "epson1355fb",
|
|
},
|
|
};
|
|
|
|
static struct platform_device *epson1355fb_device;
|
|
|
|
int __init epson1355fb_init(void)
|
|
{
|
|
int ret = 0;
|
|
|
|
if (fb_get_options("epson1355fb", NULL))
|
|
return -ENODEV;
|
|
|
|
ret = platform_driver_register(&epson1355fb_driver);
|
|
|
|
if (!ret) {
|
|
epson1355fb_device = platform_device_alloc("epson1355fb", 0);
|
|
|
|
if (epson1355fb_device)
|
|
ret = platform_device_add(epson1355fb_device);
|
|
else
|
|
ret = -ENOMEM;
|
|
|
|
if (ret) {
|
|
platform_device_put(epson1355fb_device);
|
|
platform_driver_unregister(&epson1355fb_driver);
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
module_init(epson1355fb_init);
|
|
|
|
#ifdef MODULE
|
|
static void __exit epson1355fb_exit(void)
|
|
{
|
|
platform_device_unregister(epson1355fb_device);
|
|
platform_driver_unregister(&epson1355fb_driver);
|
|
}
|
|
|
|
/* ------------------------------------------------------------------------- */
|
|
|
|
module_exit(epson1355fb_exit);
|
|
#endif
|
|
|
|
MODULE_AUTHOR("Christopher Hoover <ch@hpl.hp.com>");
|
|
MODULE_DESCRIPTION("Framebuffer driver for Epson S1D13505");
|
|
MODULE_LICENSE("GPL");
|