forked from Minki/linux
[PATCH] drivers: add LCD support
Add support for auxiliary displays, the ks0108 LCD controller, the cfag12864b LCD and adds a framebuffer device: cfag12864bfb. - Add a "auxdisplay/" folder in "drivers/" for auxiliary display drivers. - Add support for the ks0108 LCD Controller as a device driver. (uses parport interface) - Add support for the cfag12864b LCD as a device driver. (uses ks0108 LCD Controller driver) - Add a framebuffer device called cfag12864bfb. (uses cfag12864b LCD driver) - Add the usual Documentation, includes, Makefiles, Kconfigs, MAINTAINERS, CREDITS... - Miguel Ojeda will maintain all the stuff above. [rdunlap@xenotime.net: workqueue fixups] [akpm@osdl.org: kconfig fix] Signed-off-by: Miguel Ojeda Sandonis <maxextreme@gmail.com> Cc: Greg KH <greg@kroah.com> Acked-by: Paulo Marques <pmarques@grupopie.com> Cc: "Randy.Dunlap" <rdunlap@xenotime.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Miguel Ojeda Sandonis
Linus Torvalds
parent
81d79bec34
commit
70e840499a
10
CREDITS
10
CREDITS
@ -2571,6 +2571,16 @@ S: Subiaco, 6008
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S: Perth, Western Australia
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S: Perth, Western Australia
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S: Australia
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S: Australia
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N: Miguel Ojeda Sandonis
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E: maxextreme@gmail.com
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D: Author: Auxiliary LCD Controller driver (ks0108)
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D: Author: Auxiliary LCD driver (cfag12864b)
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D: Author: Auxiliary LCD framebuffer driver (cfag12864bfb)
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D: Maintainer: Auxiliary display drivers tree (drivers/auxdisplay/*)
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S: C/ Mieses 20, 9-B
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S: Valladolid 47009
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S: Spain
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N: Greg Page
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N: Greg Page
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E: gpage@sovereign.org
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E: gpage@sovereign.org
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D: IPX development and support
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D: IPX development and support
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105
Documentation/auxdisplay/cfag12864b
Normal file
105
Documentation/auxdisplay/cfag12864b
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@ -0,0 +1,105 @@
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===================================
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cfag12864b LCD Driver Documentation
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===================================
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License: GPLv2
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Author & Maintainer: Miguel Ojeda Sandonis <maxextreme@gmail.com>
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Date: 2006-10-27
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--------
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0. INDEX
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--------
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1. DRIVER INFORMATION
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2. DEVICE INFORMATION
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3. WIRING
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4. USERSPACE PROGRAMMING
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---------------------
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1. DRIVER INFORMATION
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---------------------
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This driver support one cfag12864b display at time.
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---------------------
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2. DEVICE INFORMATION
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---------------------
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Manufacturer: Crystalfontz
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Device Name: Crystalfontz 12864b LCD Series
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Device Code: cfag12864b
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Webpage: http://www.crystalfontz.com
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Device Webpage: http://www.crystalfontz.com/products/12864b/
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Type: LCD (Liquid Crystal Display)
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Width: 128
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Height: 64
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Colors: 2 (B/N)
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Controller: ks0108
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Controllers: 2
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Pages: 8 each controller
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Addresses: 64 each page
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Data size: 1 byte each address
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Memory size: 2 * 8 * 64 * 1 = 1024 bytes = 1 Kbyte
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---------
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3. WIRING
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---------
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The cfag12864b LCD Series don't have official wiring.
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The common wiring is done to the parallel port as shown:
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Parallel Port cfag12864b
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Name Pin# Pin# Name
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Strobe ( 1)------------------------------(17) Enable
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Data 0 ( 2)------------------------------( 4) Data 0
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Data 1 ( 3)------------------------------( 5) Data 1
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Data 2 ( 4)------------------------------( 6) Data 2
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Data 3 ( 5)------------------------------( 7) Data 3
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Data 4 ( 6)------------------------------( 8) Data 4
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Data 5 ( 7)------------------------------( 9) Data 5
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Data 6 ( 8)------------------------------(10) Data 6
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Data 7 ( 9)------------------------------(11) Data 7
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(10) [+5v]---( 1) Vdd
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(11) [GND]---( 2) Ground
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(12) [+5v]---(14) Reset
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(13) [GND]---(15) Read / Write
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Line (14)------------------------------(13) Controller Select 1
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(15)
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Init (16)------------------------------(12) Controller Select 2
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Select (17)------------------------------(16) Data / Instruction
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Ground (18)---[GND] [+5v]---(19) LED +
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Ground (19)---[GND]
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Ground (20)---[GND] E A Values:
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Ground (21)---[GND] [GND]---[P1]---(18) Vee · R = Resistor = 22 ohm
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Ground (22)---[GND] | · P1 = Preset = 10 Kohm
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Ground (23)---[GND] ---- S ------( 3) V0 · P2 = Preset = 1 Kohm
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Ground (24)---[GND] | |
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Ground (25)---[GND] [GND]---[P2]---[R]---(20) LED -
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------------------------
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4. USERSPACE PROGRAMMING
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------------------------
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The cfag12864bfb describes a framebuffer device (/dev/fbX).
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It has a size of 1024 bytes = 1 Kbyte.
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Each bit represents one pixel. If the bit is high, the pixel will
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turn on. If the pixel is low, the pixel will turn off.
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You can use the framebuffer as a file: fopen, fwrite, fclose...
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Although the LCD won't get updated until the next refresh time arrives.
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Also, you can mmap the framebuffer: open & mmap, munmap & close...
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which is the best option for most uses.
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Check Documentation/auxdisplay/cfag12864b-example.c
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for a real working userspace complete program with usage examples.
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282
Documentation/auxdisplay/cfag12864b-example.c
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282
Documentation/auxdisplay/cfag12864b-example.c
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@ -0,0 +1,282 @@
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/*
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* Filename: cfag12864b-example.c
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* Version: 0.1.0
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* Description: cfag12864b LCD userspace example program
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* License: GPLv2
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*
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* Author: Copyright (C) Miguel Ojeda Sandonis <maxextreme@gmail.com>
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* Date: 2006-10-31
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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/*
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* ------------------------
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* start of cfag12864b code
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* ------------------------
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*/
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#include <string.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/mman.h>
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#define CFAG12864B_WIDTH (128)
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#define CFAG12864B_HEIGHT (64)
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#define CFAG12864B_SIZE (128 * 64 / 8)
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#define CFAG12864B_BPB (8)
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#define CFAG12864B_ADDRESS(x, y) ((y) * CFAG12864B_WIDTH / \
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CFAG12864B_BPB + (x) / CFAG12864B_BPB)
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#define CFAG12864B_BIT(n) (((unsigned char) 1) << (n))
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#undef CFAG12864B_DOCHECK
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#ifdef CFAG12864B_DOCHECK
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#define CFAG12864B_CHECK(x, y) ((x) < CFAG12864B_WIDTH && \
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(y) < CFAG12864B_HEIGHT)
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#else
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#define CFAG12864B_CHECK(x, y) (1)
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#endif
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int cfag12864b_fd;
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unsigned char * cfag12864b_mem;
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unsigned char cfag12864b_buffer[CFAG12864B_SIZE];
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/*
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* init a cfag12864b framebuffer device
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*
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* No error: return = 0
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* Unable to open: return = -1
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* Unable to mmap: return = -2
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*/
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int cfag12864b_init(char *path)
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{
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cfag12864b_fd = open(path, O_RDWR);
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if (cfag12864b_fd == -1)
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return -1;
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cfag12864b_mem = mmap(0, CFAG12864B_SIZE, PROT_READ | PROT_WRITE,
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MAP_SHARED, cfag12864b_fd, 0);
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if (cfag12864b_mem == MAP_FAILED) {
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close(cfag12864b_fd);
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return -2;
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}
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return 0;
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}
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/*
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* exit a cfag12864b framebuffer device
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*/
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void cfag12864b_exit(void)
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{
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munmap(cfag12864b_mem, CFAG12864B_SIZE);
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close(cfag12864b_fd);
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}
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/*
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* set (x, y) pixel
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*/
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void cfag12864b_set(unsigned char x, unsigned char y)
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{
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if (CFAG12864B_CHECK(x, y))
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cfag12864b_buffer[CFAG12864B_ADDRESS(x, y)] |=
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CFAG12864B_BIT(x % CFAG12864B_BPB);
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}
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/*
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* unset (x, y) pixel
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*/
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void cfag12864b_unset(unsigned char x, unsigned char y)
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{
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if (CFAG12864B_CHECK(x, y))
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cfag12864b_buffer[CFAG12864B_ADDRESS(x, y)] &=
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~CFAG12864B_BIT(x % CFAG12864B_BPB);
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}
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/*
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* is set (x, y) pixel?
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*
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* Pixel off: return = 0
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* Pixel on: return = 1
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*/
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unsigned char cfag12864b_isset(unsigned char x, unsigned char y)
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{
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if (CFAG12864B_CHECK(x, y))
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if (cfag12864b_buffer[CFAG12864B_ADDRESS(x, y)] &
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CFAG12864B_BIT(x % CFAG12864B_BPB))
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return 1;
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return 0;
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}
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/*
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* not (x, y) pixel
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*/
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void cfag12864b_not(unsigned char x, unsigned char y)
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{
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if (cfag12864b_isset(x, y))
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cfag12864b_unset(x, y);
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else
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cfag12864b_set(x, y);
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}
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/*
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* fill (set all pixels)
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*/
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void cfag12864b_fill(void)
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{
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unsigned short i;
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for (i = 0; i < CFAG12864B_SIZE; i++)
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cfag12864b_buffer[i] = 0xFF;
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}
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/*
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* clear (unset all pixels)
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*/
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void cfag12864b_clear(void)
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{
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unsigned short i;
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for (i = 0; i < CFAG12864B_SIZE; i++)
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cfag12864b_buffer[i] = 0;
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}
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/*
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* format a [128*64] matrix
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*
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* Pixel off: src[i] = 0
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* Pixel on: src[i] > 0
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*/
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void cfag12864b_format(unsigned char * matrix)
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{
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unsigned char i, j, n;
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for (i = 0; i < CFAG12864B_HEIGHT; i++)
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for (j = 0; j < CFAG12864B_WIDTH / CFAG12864B_BPB; j++) {
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cfag12864b_buffer[i * CFAG12864B_WIDTH / CFAG12864B_BPB +
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j] = 0;
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for (n = 0; n < CFAG12864B_BPB; n++)
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if (matrix[i * CFAG12864B_WIDTH +
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j * CFAG12864B_BPB + n])
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cfag12864b_buffer[i * CFAG12864B_WIDTH /
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CFAG12864B_BPB + j] |=
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CFAG12864B_BIT(n);
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}
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}
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/*
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* blit buffer to lcd
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*/
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void cfag12864b_blit(void)
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{
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memcpy(cfag12864b_mem, cfag12864b_buffer, CFAG12864B_SIZE);
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}
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/*
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* ----------------------
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* end of cfag12864b code
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* ----------------------
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*/
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#include <stdio.h>
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#include <string.h>
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#define EXAMPLES 6
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void example(unsigned char n)
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{
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unsigned short i, j;
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unsigned char matrix[CFAG12864B_WIDTH * CFAG12864B_HEIGHT];
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if (n > EXAMPLES)
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return;
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printf("Example %i/%i - ", n, EXAMPLES);
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switch (n) {
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case 1:
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printf("Draw points setting bits");
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cfag12864b_clear();
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for (i = 0; i < CFAG12864B_WIDTH; i += 2)
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for (j = 0; j < CFAG12864B_HEIGHT; j += 2)
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cfag12864b_set(i, j);
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break;
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case 2:
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printf("Clear the LCD");
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cfag12864b_clear();
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break;
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case 3:
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printf("Draw rows formatting a [128*64] matrix");
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memset(matrix, 0, CFAG12864B_WIDTH * CFAG12864B_HEIGHT);
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for (i = 0; i < CFAG12864B_WIDTH; i++)
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for (j = 0; j < CFAG12864B_HEIGHT; j += 2)
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matrix[j * CFAG12864B_WIDTH + i] = 1;
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cfag12864b_format(matrix);
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break;
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case 4:
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printf("Fill the lcd");
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cfag12864b_fill();
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break;
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case 5:
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printf("Draw columns unsetting bits");
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for (i = 0; i < CFAG12864B_WIDTH; i += 2)
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for (j = 0; j < CFAG12864B_HEIGHT; j++)
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cfag12864b_unset(i, j);
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break;
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case 6:
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printf("Do negative not-ing all bits");
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for (i = 0; i < CFAG12864B_WIDTH; i++)
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for (j = 0; j < CFAG12864B_HEIGHT; j ++)
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cfag12864b_not(i, j);
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
|
||||||
|
puts(" - [Press Enter]");
|
||||||
|
}
|
||||||
|
|
||||||
|
int main(int argc, char *argv[])
|
||||||
|
{
|
||||||
|
unsigned char n;
|
||||||
|
|
||||||
|
if (argc != 2) {
|
||||||
|
printf(
|
||||||
|
"Sintax: %s fbdev\n"
|
||||||
|
"Usually: /dev/fb0, /dev/fb1...\n", argv[0]);
|
||||||
|
return -1;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (cfag12864b_init(argv[1])) {
|
||||||
|
printf("Can't init %s fbdev\n", argv[1]);
|
||||||
|
return -2;
|
||||||
|
}
|
||||||
|
|
||||||
|
for (n = 1; n <= EXAMPLES; n++) {
|
||||||
|
example(n);
|
||||||
|
cfag12864b_blit();
|
||||||
|
while (getchar() != '\n');
|
||||||
|
}
|
||||||
|
|
||||||
|
cfag12864b_exit();
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
55
Documentation/auxdisplay/ks0108
Normal file
55
Documentation/auxdisplay/ks0108
Normal file
@ -0,0 +1,55 @@
|
|||||||
|
==========================================
|
||||||
|
ks0108 LCD Controller Driver Documentation
|
||||||
|
==========================================
|
||||||
|
|
||||||
|
License: GPLv2
|
||||||
|
Author & Maintainer: Miguel Ojeda Sandonis <maxextreme@gmail.com>
|
||||||
|
Date: 2006-10-27
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
--------
|
||||||
|
0. INDEX
|
||||||
|
--------
|
||||||
|
|
||||||
|
1. DRIVER INFORMATION
|
||||||
|
2. DEVICE INFORMATION
|
||||||
|
3. WIRING
|
||||||
|
|
||||||
|
|
||||||
|
---------------------
|
||||||
|
1. DRIVER INFORMATION
|
||||||
|
---------------------
|
||||||
|
|
||||||
|
This driver support the ks0108 LCD controller.
|
||||||
|
|
||||||
|
|
||||||
|
---------------------
|
||||||
|
2. DEVICE INFORMATION
|
||||||
|
---------------------
|
||||||
|
|
||||||
|
Manufacturer: Samsung
|
||||||
|
Device Name: KS0108 LCD Controller
|
||||||
|
Device Code: ks0108
|
||||||
|
Webpage: -
|
||||||
|
Device Webpage: -
|
||||||
|
Type: LCD Controller (Liquid Crystal Display Controller)
|
||||||
|
Width: 64
|
||||||
|
Height: 64
|
||||||
|
Colors: 2 (B/N)
|
||||||
|
Pages: 8
|
||||||
|
Addresses: 64 each page
|
||||||
|
Data size: 1 byte each address
|
||||||
|
Memory size: 8 * 64 * 1 = 512 bytes
|
||||||
|
|
||||||
|
|
||||||
|
---------
|
||||||
|
3. WIRING
|
||||||
|
---------
|
||||||
|
|
||||||
|
The driver supports data parallel port wiring.
|
||||||
|
|
||||||
|
If you aren't building LCD related hardware, you should check
|
||||||
|
your LCD specific wiring information in the same folder.
|
||||||
|
|
||||||
|
For example, check Documentation/auxdisplay/cfag12864b.
|
||||||
24
MAINTAINERS
24
MAINTAINERS
@ -635,6 +635,12 @@ W: http://people.redhat.com/sgrubb/audit/
|
|||||||
T: git kernel.org:/pub/scm/linux/kernel/git/dwmw2/audit-2.6.git
|
T: git kernel.org:/pub/scm/linux/kernel/git/dwmw2/audit-2.6.git
|
||||||
S: Maintained
|
S: Maintained
|
||||||
|
|
||||||
|
AUXILIARY DISPLAY DRIVERS
|
||||||
|
P: Miguel Ojeda Sandonis
|
||||||
|
M: maxextreme@gmail.com
|
||||||
|
L: linux-kernel@vger.kernel.org
|
||||||
|
S: Maintained
|
||||||
|
|
||||||
AVR32 ARCHITECTURE
|
AVR32 ARCHITECTURE
|
||||||
P: Haavard Skinnemoen
|
P: Haavard Skinnemoen
|
||||||
M: hskinnemoen@atmel.com
|
M: hskinnemoen@atmel.com
|
||||||
@ -836,6 +842,18 @@ L: linux-kernel@vger.kernel.org
|
|||||||
L: discuss@x86-64.org
|
L: discuss@x86-64.org
|
||||||
S: Maintained
|
S: Maintained
|
||||||
|
|
||||||
|
CFAG12864B LCD DRIVER
|
||||||
|
P: Miguel Ojeda Sandonis
|
||||||
|
M: maxextreme@gmail.com
|
||||||
|
L: linux-kernel@vger.kernel.org
|
||||||
|
S: Maintained
|
||||||
|
|
||||||
|
CFAG12864BFB LCD FRAMEBUFFER DRIVER
|
||||||
|
P: Miguel Ojeda Sandonis
|
||||||
|
M: maxextreme@gmail.com
|
||||||
|
L: linux-kernel@vger.kernel.org
|
||||||
|
S: Maintained
|
||||||
|
|
||||||
COMMON INTERNET FILE SYSTEM (CIFS)
|
COMMON INTERNET FILE SYSTEM (CIFS)
|
||||||
P: Steve French
|
P: Steve French
|
||||||
M: sfrench@samba.org
|
M: sfrench@samba.org
|
||||||
@ -1971,6 +1989,12 @@ M: davem@davemloft.net
|
|||||||
L: linux-kernel@vger.kernel.org
|
L: linux-kernel@vger.kernel.org
|
||||||
S: Maintained
|
S: Maintained
|
||||||
|
|
||||||
|
KS0108 LCD CONTROLLER DRIVER
|
||||||
|
P: Miguel Ojeda Sandonis
|
||||||
|
M: maxextreme@gmail.com
|
||||||
|
L: linux-kernel@vger.kernel.org
|
||||||
|
S: Maintained
|
||||||
|
|
||||||
LAPB module
|
LAPB module
|
||||||
L: linux-x25@vger.kernel.org
|
L: linux-x25@vger.kernel.org
|
||||||
S: Orphan
|
S: Orphan
|
||||||
|
|||||||
@ -80,6 +80,8 @@ source "drivers/rtc/Kconfig"
|
|||||||
|
|
||||||
source "drivers/dma/Kconfig"
|
source "drivers/dma/Kconfig"
|
||||||
|
|
||||||
|
source "drivers/auxdisplay/Kconfig"
|
||||||
|
|
||||||
source "drivers/kvm/Kconfig"
|
source "drivers/kvm/Kconfig"
|
||||||
|
|
||||||
endmenu
|
endmenu
|
||||||
|
|||||||
@ -38,6 +38,7 @@ obj-$(CONFIG_ATA) += ata/
|
|||||||
obj-$(CONFIG_FUSION) += message/
|
obj-$(CONFIG_FUSION) += message/
|
||||||
obj-$(CONFIG_IEEE1394) += ieee1394/
|
obj-$(CONFIG_IEEE1394) += ieee1394/
|
||||||
obj-y += cdrom/
|
obj-y += cdrom/
|
||||||
|
obj-y += auxdisplay/
|
||||||
obj-$(CONFIG_MTD) += mtd/
|
obj-$(CONFIG_MTD) += mtd/
|
||||||
obj-$(CONFIG_SPI) += spi/
|
obj-$(CONFIG_SPI) += spi/
|
||||||
obj-$(CONFIG_PCCARD) += pcmcia/
|
obj-$(CONFIG_PCCARD) += pcmcia/
|
||||||
|
|||||||
109
drivers/auxdisplay/Kconfig
Normal file
109
drivers/auxdisplay/Kconfig
Normal file
@ -0,0 +1,109 @@
|
|||||||
|
#
|
||||||
|
# For a description of the syntax of this configuration file,
|
||||||
|
# see Documentation/kbuild/kconfig-language.txt.
|
||||||
|
#
|
||||||
|
# Auxiliary display drivers configuration.
|
||||||
|
#
|
||||||
|
|
||||||
|
menu "Auxiliary Display support"
|
||||||
|
|
||||||
|
config KS0108
|
||||||
|
tristate "KS0108 LCD Controller"
|
||||||
|
depends on PARPORT_PC
|
||||||
|
default n
|
||||||
|
---help---
|
||||||
|
If you have a LCD controlled by one or more KS0108
|
||||||
|
controllers, say Y. You will need also another more specific
|
||||||
|
driver for your LCD.
|
||||||
|
|
||||||
|
Depends on Parallel Port support. If you say Y at
|
||||||
|
parport, you will be able to compile this as a module (M)
|
||||||
|
and built-in as well (Y).
|
||||||
|
|
||||||
|
To compile this as a module, choose M here:
|
||||||
|
the module will be called ks0108.
|
||||||
|
|
||||||
|
If unsure, say N.
|
||||||
|
|
||||||
|
config KS0108_PORT
|
||||||
|
hex "Parallel port where the LCD is connected"
|
||||||
|
depends on KS0108
|
||||||
|
default 0x378
|
||||||
|
---help---
|
||||||
|
The address of the parallel port where the LCD is connected.
|
||||||
|
|
||||||
|
The first standard parallel port address is 0x378.
|
||||||
|
The second standard parallel port address is 0x278.
|
||||||
|
The third standard parallel port address is 0x3BC.
|
||||||
|
|
||||||
|
You can specify a different address if you need.
|
||||||
|
|
||||||
|
If you don't know what I'm talking about, load the parport module,
|
||||||
|
and execute "dmesg" or "cat /proc/ioports". You can see there how
|
||||||
|
many parallel ports are present and which address each one has.
|
||||||
|
|
||||||
|
Usually you only need to use 0x378.
|
||||||
|
|
||||||
|
If you compile this as a module, you can still override this
|
||||||
|
using the module parameters.
|
||||||
|
|
||||||
|
config KS0108_DELAY
|
||||||
|
int "Delay between each control writing (microseconds)"
|
||||||
|
depends on KS0108
|
||||||
|
default "2"
|
||||||
|
---help---
|
||||||
|
Amount of time the ks0108 should wait between each control write
|
||||||
|
to the parallel port.
|
||||||
|
|
||||||
|
If your driver seems to miss random writings, increment this.
|
||||||
|
|
||||||
|
If you don't know what I'm talking about, ignore it.
|
||||||
|
|
||||||
|
If you compile this as a module, you can still override this
|
||||||
|
value using the module parameters.
|
||||||
|
|
||||||
|
config CFAG12864B
|
||||||
|
tristate "CFAG12864B LCD"
|
||||||
|
depends on X86
|
||||||
|
depends on FB
|
||||||
|
depends on KS0108
|
||||||
|
default n
|
||||||
|
---help---
|
||||||
|
If you have a Crystalfontz 128x64 2-color LCD, cfag12864b Series,
|
||||||
|
say Y. You also need the ks0108 LCD Controller driver.
|
||||||
|
|
||||||
|
For help about how to wire your LCD to the parallel port,
|
||||||
|
check Documentation/auxdisplay/cfag12864b
|
||||||
|
|
||||||
|
Depends on the x86 arch and the framebuffer support.
|
||||||
|
|
||||||
|
The LCD framebuffer driver can be attached to a console.
|
||||||
|
It will work fine. However, you can't attach it to the fbdev driver
|
||||||
|
of the xorg server.
|
||||||
|
|
||||||
|
To compile this as a module, choose M here:
|
||||||
|
the modules will be called cfag12864b and cfag12864bfb.
|
||||||
|
|
||||||
|
If unsure, say N.
|
||||||
|
|
||||||
|
config CFAG12864B_RATE
|
||||||
|
int "Refresh rate (hertz)"
|
||||||
|
depends on CFAG12864B
|
||||||
|
default "20"
|
||||||
|
---help---
|
||||||
|
Refresh rate of the LCD.
|
||||||
|
|
||||||
|
As the LCD is not memory mapped, the driver has to make the work by
|
||||||
|
software. This means you should be careful setting this value higher.
|
||||||
|
If your CPUs are really slow or you feel the system is slowed down,
|
||||||
|
decrease the value.
|
||||||
|
|
||||||
|
Be careful modifying this value to a very high value:
|
||||||
|
You can freeze the computer, or the LCD maybe can't draw as fast as you
|
||||||
|
are requesting.
|
||||||
|
|
||||||
|
If you don't know what I'm talking about, ignore it.
|
||||||
|
|
||||||
|
If you compile this as a module, you can still override this
|
||||||
|
value using the module parameters.
|
||||||
|
endmenu
|
||||||
6
drivers/auxdisplay/Makefile
Normal file
6
drivers/auxdisplay/Makefile
Normal file
@ -0,0 +1,6 @@
|
|||||||
|
#
|
||||||
|
# Makefile for the kernel auxiliary displays device drivers.
|
||||||
|
#
|
||||||
|
|
||||||
|
obj-$(CONFIG_KS0108) += ks0108.o
|
||||||
|
obj-$(CONFIG_CFAG12864B) += cfag12864b.o cfag12864bfb.o
|
||||||
383
drivers/auxdisplay/cfag12864b.c
Normal file
383
drivers/auxdisplay/cfag12864b.c
Normal file
@ -0,0 +1,383 @@
|
|||||||
|
/*
|
||||||
|
* Filename: cfag12864b.c
|
||||||
|
* Version: 0.1.0
|
||||||
|
* Description: cfag12864b LCD driver
|
||||||
|
* License: GPLv2
|
||||||
|
* Depends: ks0108
|
||||||
|
*
|
||||||
|
* Author: Copyright (C) Miguel Ojeda Sandonis <maxextreme@gmail.com>
|
||||||
|
* Date: 2006-10-31
|
||||||
|
*
|
||||||
|
* This program is free software; you can redistribute it and/or modify
|
||||||
|
* it under the terms of the GNU General Public License version 2 as
|
||||||
|
* published by the Free Software Foundation.
|
||||||
|
*
|
||||||
|
* This program is distributed in the hope that it will be useful,
|
||||||
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||||
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||||
|
* GNU General Public License for more details.
|
||||||
|
*
|
||||||
|
* You should have received a copy of the GNU General Public License
|
||||||
|
* along with this program; if not, write to the Free Software
|
||||||
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||||
|
*
|
||||||
|
*/
|
||||||
|
|
||||||
|
#include <linux/init.h>
|
||||||
|
#include <linux/module.h>
|
||||||
|
#include <linux/kernel.h>
|
||||||
|
#include <linux/fs.h>
|
||||||
|
#include <linux/cdev.h>
|
||||||
|
#include <linux/delay.h>
|
||||||
|
#include <linux/device.h>
|
||||||
|
#include <linux/jiffies.h>
|
||||||
|
#include <linux/mutex.h>
|
||||||
|
#include <linux/uaccess.h>
|
||||||
|
#include <linux/vmalloc.h>
|
||||||
|
#include <linux/workqueue.h>
|
||||||
|
#include <linux/ks0108.h>
|
||||||
|
#include <linux/cfag12864b.h>
|
||||||
|
|
||||||
|
|
||||||
|
#define CFAG12864B_NAME "cfag12864b"
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Module Parameters
|
||||||
|
*/
|
||||||
|
|
||||||
|
static unsigned int cfag12864b_rate = CONFIG_CFAG12864B_RATE;
|
||||||
|
module_param(cfag12864b_rate, uint, S_IRUGO);
|
||||||
|
MODULE_PARM_DESC(cfag12864b_rate,
|
||||||
|
"Refresh rate (hertzs)");
|
||||||
|
|
||||||
|
unsigned int cfag12864b_getrate(void)
|
||||||
|
{
|
||||||
|
return cfag12864b_rate;
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* cfag12864b Commands
|
||||||
|
*
|
||||||
|
* E = Enable signal
|
||||||
|
* Everytime E switch from low to high,
|
||||||
|
* cfag12864b/ks0108 reads the command/data.
|
||||||
|
*
|
||||||
|
* CS1 = First ks0108controller.
|
||||||
|
* If high, the first ks0108 controller receives commands/data.
|
||||||
|
*
|
||||||
|
* CS2 = Second ks0108 controller
|
||||||
|
* If high, the second ks0108 controller receives commands/data.
|
||||||
|
*
|
||||||
|
* DI = Data/Instruction
|
||||||
|
* If low, cfag12864b will expect commands.
|
||||||
|
* If high, cfag12864b will expect data.
|
||||||
|
*
|
||||||
|
*/
|
||||||
|
|
||||||
|
#define bit(n) (((unsigned char)1)<<(n))
|
||||||
|
|
||||||
|
#define CFAG12864B_BIT_E (0)
|
||||||
|
#define CFAG12864B_BIT_CS1 (2)
|
||||||
|
#define CFAG12864B_BIT_CS2 (1)
|
||||||
|
#define CFAG12864B_BIT_DI (3)
|
||||||
|
|
||||||
|
static unsigned char cfag12864b_state;
|
||||||
|
|
||||||
|
static void cfag12864b_set(void)
|
||||||
|
{
|
||||||
|
ks0108_writecontrol(cfag12864b_state);
|
||||||
|
}
|
||||||
|
|
||||||
|
static void cfag12864b_setbit(unsigned char state, unsigned char n)
|
||||||
|
{
|
||||||
|
if (state)
|
||||||
|
cfag12864b_state |= bit(n);
|
||||||
|
else
|
||||||
|
cfag12864b_state &= ~bit(n);
|
||||||
|
}
|
||||||
|
|
||||||
|
static void cfag12864b_e(unsigned char state)
|
||||||
|
{
|
||||||
|
cfag12864b_setbit(state, CFAG12864B_BIT_E);
|
||||||
|
cfag12864b_set();
|
||||||
|
}
|
||||||
|
|
||||||
|
static void cfag12864b_cs1(unsigned char state)
|
||||||
|
{
|
||||||
|
cfag12864b_setbit(state, CFAG12864B_BIT_CS1);
|
||||||
|
}
|
||||||
|
|
||||||
|
static void cfag12864b_cs2(unsigned char state)
|
||||||
|
{
|
||||||
|
cfag12864b_setbit(state, CFAG12864B_BIT_CS2);
|
||||||
|
}
|
||||||
|
|
||||||
|
static void cfag12864b_di(unsigned char state)
|
||||||
|
{
|
||||||
|
cfag12864b_setbit(state, CFAG12864B_BIT_DI);
|
||||||
|
}
|
||||||
|
|
||||||
|
static void cfag12864b_setcontrollers(unsigned char first,
|
||||||
|
unsigned char second)
|
||||||
|
{
|
||||||
|
if (first)
|
||||||
|
cfag12864b_cs1(0);
|
||||||
|
else
|
||||||
|
cfag12864b_cs1(1);
|
||||||
|
|
||||||
|
if (second)
|
||||||
|
cfag12864b_cs2(0);
|
||||||
|
else
|
||||||
|
cfag12864b_cs2(1);
|
||||||
|
}
|
||||||
|
|
||||||
|
static void cfag12864b_controller(unsigned char which)
|
||||||
|
{
|
||||||
|
if (which == 0)
|
||||||
|
cfag12864b_setcontrollers(1, 0);
|
||||||
|
else if (which == 1)
|
||||||
|
cfag12864b_setcontrollers(0, 1);
|
||||||
|
}
|
||||||
|
|
||||||
|
static void cfag12864b_displaystate(unsigned char state)
|
||||||
|
{
|
||||||
|
cfag12864b_di(0);
|
||||||
|
cfag12864b_e(1);
|
||||||
|
ks0108_displaystate(state);
|
||||||
|
cfag12864b_e(0);
|
||||||
|
}
|
||||||
|
|
||||||
|
static void cfag12864b_address(unsigned char address)
|
||||||
|
{
|
||||||
|
cfag12864b_di(0);
|
||||||
|
cfag12864b_e(1);
|
||||||
|
ks0108_address(address);
|
||||||
|
cfag12864b_e(0);
|
||||||
|
}
|
||||||
|
|
||||||
|
static void cfag12864b_page(unsigned char page)
|
||||||
|
{
|
||||||
|
cfag12864b_di(0);
|
||||||
|
cfag12864b_e(1);
|
||||||
|
ks0108_page(page);
|
||||||
|
cfag12864b_e(0);
|
||||||
|
}
|
||||||
|
|
||||||
|
static void cfag12864b_startline(unsigned char startline)
|
||||||
|
{
|
||||||
|
cfag12864b_di(0);
|
||||||
|
cfag12864b_e(1);
|
||||||
|
ks0108_startline(startline);
|
||||||
|
cfag12864b_e(0);
|
||||||
|
}
|
||||||
|
|
||||||
|
static void cfag12864b_writebyte(unsigned char byte)
|
||||||
|
{
|
||||||
|
cfag12864b_di(1);
|
||||||
|
cfag12864b_e(1);
|
||||||
|
ks0108_writedata(byte);
|
||||||
|
cfag12864b_e(0);
|
||||||
|
}
|
||||||
|
|
||||||
|
static void cfag12864b_nop(void)
|
||||||
|
{
|
||||||
|
cfag12864b_startline(0);
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* cfag12864b Internal Commands
|
||||||
|
*/
|
||||||
|
|
||||||
|
static void cfag12864b_on(void)
|
||||||
|
{
|
||||||
|
cfag12864b_setcontrollers(1, 1);
|
||||||
|
cfag12864b_displaystate(1);
|
||||||
|
}
|
||||||
|
|
||||||
|
static void cfag12864b_off(void)
|
||||||
|
{
|
||||||
|
cfag12864b_setcontrollers(1, 1);
|
||||||
|
cfag12864b_displaystate(0);
|
||||||
|
}
|
||||||
|
|
||||||
|
static void cfag12864b_clear(void)
|
||||||
|
{
|
||||||
|
unsigned char i, j;
|
||||||
|
|
||||||
|
cfag12864b_setcontrollers(1, 1);
|
||||||
|
for (i = 0; i < CFAG12864B_PAGES; i++) {
|
||||||
|
cfag12864b_page(i);
|
||||||
|
cfag12864b_address(0);
|
||||||
|
for (j = 0; j < CFAG12864B_ADDRESSES; j++)
|
||||||
|
cfag12864b_writebyte(0);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Update work
|
||||||
|
*/
|
||||||
|
|
||||||
|
unsigned char *cfag12864b_buffer;
|
||||||
|
static unsigned char *cfag12864b_cache;
|
||||||
|
static DEFINE_MUTEX(cfag12864b_mutex);
|
||||||
|
static unsigned char cfag12864b_updating;
|
||||||
|
static void cfag12864b_update(struct work_struct *delayed_work);
|
||||||
|
static struct workqueue_struct *cfag12864b_workqueue;
|
||||||
|
static DECLARE_DELAYED_WORK(cfag12864b_work, cfag12864b_update);
|
||||||
|
|
||||||
|
static void cfag12864b_queue(void)
|
||||||
|
{
|
||||||
|
queue_delayed_work(cfag12864b_workqueue, &cfag12864b_work,
|
||||||
|
HZ / cfag12864b_rate);
|
||||||
|
}
|
||||||
|
|
||||||
|
unsigned char cfag12864b_enable(void)
|
||||||
|
{
|
||||||
|
unsigned char ret;
|
||||||
|
|
||||||
|
mutex_lock(&cfag12864b_mutex);
|
||||||
|
|
||||||
|
if (!cfag12864b_updating) {
|
||||||
|
cfag12864b_updating = 1;
|
||||||
|
cfag12864b_queue();
|
||||||
|
ret = 0;
|
||||||
|
} else
|
||||||
|
ret = 1;
|
||||||
|
|
||||||
|
mutex_unlock(&cfag12864b_mutex);
|
||||||
|
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
void cfag12864b_disable(void)
|
||||||
|
{
|
||||||
|
mutex_lock(&cfag12864b_mutex);
|
||||||
|
|
||||||
|
if (cfag12864b_updating) {
|
||||||
|
cfag12864b_updating = 0;
|
||||||
|
cancel_delayed_work(&cfag12864b_work);
|
||||||
|
flush_workqueue(cfag12864b_workqueue);
|
||||||
|
}
|
||||||
|
|
||||||
|
mutex_unlock(&cfag12864b_mutex);
|
||||||
|
}
|
||||||
|
|
||||||
|
unsigned char cfag12864b_isenabled(void)
|
||||||
|
{
|
||||||
|
return cfag12864b_updating;
|
||||||
|
}
|
||||||
|
|
||||||
|
static void cfag12864b_update(struct work_struct *work)
|
||||||
|
{
|
||||||
|
unsigned char c;
|
||||||
|
unsigned short i, j, k, b;
|
||||||
|
|
||||||
|
if (memcmp(cfag12864b_cache, cfag12864b_buffer, CFAG12864B_SIZE)) {
|
||||||
|
for (i = 0; i < CFAG12864B_CONTROLLERS; i++) {
|
||||||
|
cfag12864b_controller(i);
|
||||||
|
cfag12864b_nop();
|
||||||
|
for (j = 0; j < CFAG12864B_PAGES; j++) {
|
||||||
|
cfag12864b_page(j);
|
||||||
|
cfag12864b_nop();
|
||||||
|
cfag12864b_address(0);
|
||||||
|
cfag12864b_nop();
|
||||||
|
for (k = 0; k < CFAG12864B_ADDRESSES; k++) {
|
||||||
|
for (c = 0, b = 0; b < 8; b++)
|
||||||
|
if (cfag12864b_buffer
|
||||||
|
[i * CFAG12864B_ADDRESSES / 8
|
||||||
|
+ k / 8 + (j * 8 + b) *
|
||||||
|
CFAG12864B_WIDTH / 8]
|
||||||
|
& bit(k % 8))
|
||||||
|
c |= bit(b);
|
||||||
|
cfag12864b_writebyte(c);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
memcpy(cfag12864b_cache, cfag12864b_buffer, CFAG12864B_SIZE);
|
||||||
|
}
|
||||||
|
|
||||||
|
if (cfag12864b_updating)
|
||||||
|
cfag12864b_queue();
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* cfag12864b Exported Symbols
|
||||||
|
*/
|
||||||
|
|
||||||
|
EXPORT_SYMBOL_GPL(cfag12864b_buffer);
|
||||||
|
EXPORT_SYMBOL_GPL(cfag12864b_getrate);
|
||||||
|
EXPORT_SYMBOL_GPL(cfag12864b_enable);
|
||||||
|
EXPORT_SYMBOL_GPL(cfag12864b_disable);
|
||||||
|
EXPORT_SYMBOL_GPL(cfag12864b_isenabled);
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Module Init & Exit
|
||||||
|
*/
|
||||||
|
|
||||||
|
static int __init cfag12864b_init(void)
|
||||||
|
{
|
||||||
|
int ret = -EINVAL;
|
||||||
|
|
||||||
|
if (PAGE_SIZE < CFAG12864B_SIZE) {
|
||||||
|
printk(KERN_ERR CFAG12864B_NAME ": ERROR: "
|
||||||
|
"page size (%i) < cfag12864b size (%i)\n",
|
||||||
|
(unsigned int)PAGE_SIZE, CFAG12864B_SIZE);
|
||||||
|
ret = -ENOMEM;
|
||||||
|
goto none;
|
||||||
|
}
|
||||||
|
|
||||||
|
cfag12864b_buffer = (unsigned char *) __get_free_page(GFP_KERNEL);
|
||||||
|
if (cfag12864b_buffer == NULL) {
|
||||||
|
printk(KERN_ERR CFAG12864B_NAME ": ERROR: "
|
||||||
|
"can't get a free page\n");
|
||||||
|
ret = -ENOMEM;
|
||||||
|
goto none;
|
||||||
|
}
|
||||||
|
|
||||||
|
cfag12864b_cache = kmalloc(sizeof(unsigned char) *
|
||||||
|
CFAG12864B_SIZE, GFP_KERNEL);
|
||||||
|
if (cfag12864b_buffer == NULL) {
|
||||||
|
printk(KERN_ERR CFAG12864B_NAME ": ERROR: "
|
||||||
|
"can't alloc cache buffer (%i bytes)\n",
|
||||||
|
CFAG12864B_SIZE);
|
||||||
|
ret = -ENOMEM;
|
||||||
|
goto bufferalloced;
|
||||||
|
}
|
||||||
|
|
||||||
|
cfag12864b_workqueue = create_singlethread_workqueue(CFAG12864B_NAME);
|
||||||
|
if (cfag12864b_workqueue == NULL)
|
||||||
|
goto cachealloced;
|
||||||
|
|
||||||
|
memset(cfag12864b_buffer, 0, CFAG12864B_SIZE);
|
||||||
|
|
||||||
|
cfag12864b_clear();
|
||||||
|
cfag12864b_on();
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
|
||||||
|
cachealloced:
|
||||||
|
kfree(cfag12864b_cache);
|
||||||
|
|
||||||
|
bufferalloced:
|
||||||
|
free_page((unsigned long) cfag12864b_buffer);
|
||||||
|
|
||||||
|
none:
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
static void __exit cfag12864b_exit(void)
|
||||||
|
{
|
||||||
|
cfag12864b_disable();
|
||||||
|
cfag12864b_off();
|
||||||
|
destroy_workqueue(cfag12864b_workqueue);
|
||||||
|
kfree(cfag12864b_cache);
|
||||||
|
free_page((unsigned long) cfag12864b_buffer);
|
||||||
|
}
|
||||||
|
|
||||||
|
module_init(cfag12864b_init);
|
||||||
|
module_exit(cfag12864b_exit);
|
||||||
|
|
||||||
|
MODULE_LICENSE("GPL v2");
|
||||||
|
MODULE_AUTHOR("Miguel Ojeda Sandonis <maxextreme@gmail.com>");
|
||||||
|
MODULE_DESCRIPTION("cfag12864b LCD driver");
|
||||||
180
drivers/auxdisplay/cfag12864bfb.c
Normal file
180
drivers/auxdisplay/cfag12864bfb.c
Normal file
@ -0,0 +1,180 @@
|
|||||||
|
/*
|
||||||
|
* Filename: cfag12864bfb.c
|
||||||
|
* Version: 0.1.0
|
||||||
|
* Description: cfag12864b LCD framebuffer driver
|
||||||
|
* License: GPLv2
|
||||||
|
* Depends: cfag12864b
|
||||||
|
*
|
||||||
|
* Author: Copyright (C) Miguel Ojeda Sandonis <maxextreme@gmail.com>
|
||||||
|
* Date: 2006-10-31
|
||||||
|
*
|
||||||
|
* This program is free software; you can redistribute it and/or modify
|
||||||
|
* it under the terms of the GNU General Public License version 2 as
|
||||||
|
* published by the Free Software Foundation.
|
||||||
|
*
|
||||||
|
* This program is distributed in the hope that it will be useful,
|
||||||
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||||
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||||
|
* GNU General Public License for more details.
|
||||||
|
*
|
||||||
|
* You should have received a copy of the GNU General Public License
|
||||||
|
* along with this program; if not, write to the Free Software
|
||||||
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||||
|
*
|
||||||
|
*/
|
||||||
|
|
||||||
|
#include <linux/init.h>
|
||||||
|
#include <linux/module.h>
|
||||||
|
#include <linux/kernel.h>
|
||||||
|
#include <linux/delay.h>
|
||||||
|
#include <linux/errno.h>
|
||||||
|
#include <linux/fb.h>
|
||||||
|
#include <linux/mm.h>
|
||||||
|
#include <linux/platform_device.h>
|
||||||
|
#include <linux/slab.h>
|
||||||
|
#include <linux/string.h>
|
||||||
|
#include <linux/uaccess.h>
|
||||||
|
#include <linux/cfag12864b.h>
|
||||||
|
|
||||||
|
#define CFAG12864BFB_NAME "cfag12864bfb"
|
||||||
|
|
||||||
|
static struct fb_fix_screeninfo cfag12864bfb_fix __initdata = {
|
||||||
|
.id = "cfag12864b",
|
||||||
|
.type = FB_TYPE_PACKED_PIXELS,
|
||||||
|
.visual = FB_VISUAL_MONO10,
|
||||||
|
.xpanstep = 0,
|
||||||
|
.ypanstep = 0,
|
||||||
|
.ywrapstep = 0,
|
||||||
|
.line_length = CFAG12864B_WIDTH / 8,
|
||||||
|
.accel = FB_ACCEL_NONE,
|
||||||
|
};
|
||||||
|
|
||||||
|
static struct fb_var_screeninfo cfag12864bfb_var __initdata = {
|
||||||
|
.xres = CFAG12864B_WIDTH,
|
||||||
|
.yres = CFAG12864B_HEIGHT,
|
||||||
|
.xres_virtual = CFAG12864B_WIDTH,
|
||||||
|
.yres_virtual = CFAG12864B_HEIGHT,
|
||||||
|
.bits_per_pixel = 1,
|
||||||
|
.red = { 0, 1, 0 },
|
||||||
|
.green = { 0, 1, 0 },
|
||||||
|
.blue = { 0, 1, 0 },
|
||||||
|
.left_margin = 0,
|
||||||
|
.right_margin = 0,
|
||||||
|
.upper_margin = 0,
|
||||||
|
.lower_margin = 0,
|
||||||
|
.vmode = FB_VMODE_NONINTERLACED,
|
||||||
|
};
|
||||||
|
|
||||||
|
static int cfag12864bfb_mmap(struct fb_info *info, struct vm_area_struct *vma)
|
||||||
|
{
|
||||||
|
return vm_insert_page(vma, vma->vm_start,
|
||||||
|
virt_to_page(cfag12864b_buffer));
|
||||||
|
}
|
||||||
|
|
||||||
|
static struct fb_ops cfag12864bfb_ops = {
|
||||||
|
.owner = THIS_MODULE,
|
||||||
|
.fb_fillrect = cfb_fillrect,
|
||||||
|
.fb_copyarea = cfb_copyarea,
|
||||||
|
.fb_imageblit = cfb_imageblit,
|
||||||
|
.fb_mmap = cfag12864bfb_mmap,
|
||||||
|
};
|
||||||
|
|
||||||
|
static int __init cfag12864bfb_probe(struct platform_device *device)
|
||||||
|
{
|
||||||
|
int ret = -EINVAL;
|
||||||
|
struct fb_info *info = framebuffer_alloc(0, &device->dev);
|
||||||
|
|
||||||
|
if (!info)
|
||||||
|
goto none;
|
||||||
|
|
||||||
|
info->screen_base = (char __iomem *) cfag12864b_buffer;
|
||||||
|
info->screen_size = CFAG12864B_SIZE;
|
||||||
|
info->fbops = &cfag12864bfb_ops;
|
||||||
|
info->fix = cfag12864bfb_fix;
|
||||||
|
info->var = cfag12864bfb_var;
|
||||||
|
info->pseudo_palette = NULL;
|
||||||
|
info->par = NULL;
|
||||||
|
info->flags = FBINFO_FLAG_DEFAULT;
|
||||||
|
|
||||||
|
if (register_framebuffer(info) < 0)
|
||||||
|
goto fballoced;
|
||||||
|
|
||||||
|
platform_set_drvdata(device, info);
|
||||||
|
|
||||||
|
printk(KERN_INFO "fb%d: %s frame buffer device\n", info->node,
|
||||||
|
info->fix.id);
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
|
||||||
|
fballoced:
|
||||||
|
framebuffer_release(info);
|
||||||
|
|
||||||
|
none:
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int cfag12864bfb_remove(struct platform_device *device)
|
||||||
|
{
|
||||||
|
struct fb_info *info = platform_get_drvdata(device);
|
||||||
|
|
||||||
|
if (info) {
|
||||||
|
unregister_framebuffer(info);
|
||||||
|
framebuffer_release(info);
|
||||||
|
}
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static struct platform_driver cfag12864bfb_driver = {
|
||||||
|
.probe = cfag12864bfb_probe,
|
||||||
|
.remove = cfag12864bfb_remove,
|
||||||
|
.driver = {
|
||||||
|
.name = CFAG12864BFB_NAME,
|
||||||
|
},
|
||||||
|
};
|
||||||
|
|
||||||
|
static struct platform_device *cfag12864bfb_device;
|
||||||
|
|
||||||
|
static int __init cfag12864bfb_init(void)
|
||||||
|
{
|
||||||
|
int ret;
|
||||||
|
|
||||||
|
if (cfag12864b_enable()) {
|
||||||
|
printk(KERN_ERR CFAG12864BFB_NAME ": ERROR: "
|
||||||
|
"can't enable cfag12864b refreshing (being used)\n");
|
||||||
|
return -ENODEV;
|
||||||
|
}
|
||||||
|
|
||||||
|
ret = platform_driver_register(&cfag12864bfb_driver);
|
||||||
|
|
||||||
|
if (!ret) {
|
||||||
|
cfag12864bfb_device =
|
||||||
|
platform_device_alloc(CFAG12864BFB_NAME, 0);
|
||||||
|
|
||||||
|
if (cfag12864bfb_device)
|
||||||
|
ret = platform_device_add(cfag12864bfb_device);
|
||||||
|
else
|
||||||
|
ret = -ENOMEM;
|
||||||
|
|
||||||
|
if (ret) {
|
||||||
|
platform_device_put(cfag12864bfb_device);
|
||||||
|
platform_driver_unregister(&cfag12864bfb_driver);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
static void __exit cfag12864bfb_exit(void)
|
||||||
|
{
|
||||||
|
platform_device_unregister(cfag12864bfb_device);
|
||||||
|
platform_driver_unregister(&cfag12864bfb_driver);
|
||||||
|
cfag12864b_disable();
|
||||||
|
}
|
||||||
|
|
||||||
|
module_init(cfag12864bfb_init);
|
||||||
|
module_exit(cfag12864bfb_exit);
|
||||||
|
|
||||||
|
MODULE_LICENSE("GPL v2");
|
||||||
|
MODULE_AUTHOR("Miguel Ojeda Sandonis <maxextreme@gmail.com>");
|
||||||
|
MODULE_DESCRIPTION("cfag12864b LCD framebuffer driver");
|
||||||
166
drivers/auxdisplay/ks0108.c
Normal file
166
drivers/auxdisplay/ks0108.c
Normal file
@ -0,0 +1,166 @@
|
|||||||
|
/*
|
||||||
|
* Filename: ks0108.c
|
||||||
|
* Version: 0.1.0
|
||||||
|
* Description: ks0108 LCD Controller driver
|
||||||
|
* License: GPLv2
|
||||||
|
* Depends: parport
|
||||||
|
*
|
||||||
|
* Author: Copyright (C) Miguel Ojeda Sandonis <maxextreme@gmail.com>
|
||||||
|
* Date: 2006-10-31
|
||||||
|
*
|
||||||
|
* This program is free software; you can redistribute it and/or modify
|
||||||
|
* it under the terms of the GNU General Public License version 2 as
|
||||||
|
* published by the Free Software Foundation.
|
||||||
|
*
|
||||||
|
* This program is distributed in the hope that it will be useful,
|
||||||
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||||
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||||
|
* GNU General Public License for more details.
|
||||||
|
*
|
||||||
|
* You should have received a copy of the GNU General Public License
|
||||||
|
* along with this program; if not, write to the Free Software
|
||||||
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||||
|
*
|
||||||
|
*/
|
||||||
|
|
||||||
|
#include <linux/init.h>
|
||||||
|
#include <linux/module.h>
|
||||||
|
#include <linux/kernel.h>
|
||||||
|
#include <linux/delay.h>
|
||||||
|
#include <linux/fs.h>
|
||||||
|
#include <linux/io.h>
|
||||||
|
#include <linux/parport.h>
|
||||||
|
#include <linux/uaccess.h>
|
||||||
|
#include <linux/ks0108.h>
|
||||||
|
|
||||||
|
#define KS0108_NAME "ks0108"
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Module Parameters
|
||||||
|
*/
|
||||||
|
|
||||||
|
static unsigned int ks0108_port = CONFIG_KS0108_PORT;
|
||||||
|
module_param(ks0108_port, uint, S_IRUGO);
|
||||||
|
MODULE_PARM_DESC(ks0108_port, "Parallel port where the LCD is connected");
|
||||||
|
|
||||||
|
static unsigned int ks0108_delay = CONFIG_KS0108_DELAY;
|
||||||
|
module_param(ks0108_delay, uint, S_IRUGO);
|
||||||
|
MODULE_PARM_DESC(ks0108_delay, "Delay between each control writing (microseconds)");
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Device
|
||||||
|
*/
|
||||||
|
|
||||||
|
static struct parport *ks0108_parport;
|
||||||
|
static struct pardevice *ks0108_pardevice;
|
||||||
|
|
||||||
|
/*
|
||||||
|
* ks0108 Exported Commands (don't lock)
|
||||||
|
*
|
||||||
|
* You _should_ lock in the top driver: This functions _should not_
|
||||||
|
* get race conditions in any way. Locking for each byte here would be
|
||||||
|
* so slow and useless.
|
||||||
|
*
|
||||||
|
* There are not bit definitions because they are not flags,
|
||||||
|
* just arbitrary combinations defined by the documentation for each
|
||||||
|
* function in the ks0108 LCD controller. If you want to know what means
|
||||||
|
* a specific combination, look at the function's name.
|
||||||
|
*
|
||||||
|
* The ks0108_writecontrol bits need to be reverted ^(0,1,3) because
|
||||||
|
* the parallel port also revert them using a "not" logic gate.
|
||||||
|
*/
|
||||||
|
|
||||||
|
#define bit(n) (((unsigned char)1)<<(n))
|
||||||
|
|
||||||
|
void ks0108_writedata(unsigned char byte)
|
||||||
|
{
|
||||||
|
parport_write_data(ks0108_parport, byte);
|
||||||
|
}
|
||||||
|
|
||||||
|
void ks0108_writecontrol(unsigned char byte)
|
||||||
|
{
|
||||||
|
udelay(ks0108_delay);
|
||||||
|
parport_write_control(ks0108_parport, byte ^ (bit(0) | bit(1) | bit(3)));
|
||||||
|
}
|
||||||
|
|
||||||
|
void ks0108_displaystate(unsigned char state)
|
||||||
|
{
|
||||||
|
ks0108_writedata((state ? bit(0) : 0) | bit(1) | bit(2) | bit(3) | bit(4) | bit(5));
|
||||||
|
}
|
||||||
|
|
||||||
|
void ks0108_startline(unsigned char startline)
|
||||||
|
{
|
||||||
|
ks0108_writedata(min(startline,(unsigned char)63) | bit(6) | bit(7));
|
||||||
|
}
|
||||||
|
|
||||||
|
void ks0108_address(unsigned char address)
|
||||||
|
{
|
||||||
|
ks0108_writedata(min(address,(unsigned char)63) | bit(6));
|
||||||
|
}
|
||||||
|
|
||||||
|
void ks0108_page(unsigned char page)
|
||||||
|
{
|
||||||
|
ks0108_writedata(min(page,(unsigned char)7) | bit(3) | bit(4) | bit(5) | bit(7));
|
||||||
|
}
|
||||||
|
|
||||||
|
EXPORT_SYMBOL_GPL(ks0108_writedata);
|
||||||
|
EXPORT_SYMBOL_GPL(ks0108_writecontrol);
|
||||||
|
EXPORT_SYMBOL_GPL(ks0108_displaystate);
|
||||||
|
EXPORT_SYMBOL_GPL(ks0108_startline);
|
||||||
|
EXPORT_SYMBOL_GPL(ks0108_address);
|
||||||
|
EXPORT_SYMBOL_GPL(ks0108_page);
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Module Init & Exit
|
||||||
|
*/
|
||||||
|
|
||||||
|
static int __init ks0108_init(void)
|
||||||
|
{
|
||||||
|
int result;
|
||||||
|
int ret = -EINVAL;
|
||||||
|
|
||||||
|
ks0108_parport = parport_find_base(ks0108_port);
|
||||||
|
if (ks0108_parport == NULL) {
|
||||||
|
printk(KERN_ERR KS0108_NAME ": ERROR: "
|
||||||
|
"parport didn't find %i port\n", ks0108_port);
|
||||||
|
goto none;
|
||||||
|
}
|
||||||
|
|
||||||
|
ks0108_pardevice = parport_register_device(ks0108_parport, KS0108_NAME,
|
||||||
|
NULL, NULL, NULL, PARPORT_DEV_EXCL, NULL);
|
||||||
|
if (ks0108_pardevice == NULL) {
|
||||||
|
printk(KERN_ERR KS0108_NAME ": ERROR: "
|
||||||
|
"parport didn't register new device\n");
|
||||||
|
goto none;
|
||||||
|
}
|
||||||
|
|
||||||
|
result = parport_claim(ks0108_pardevice);
|
||||||
|
if (result != 0) {
|
||||||
|
printk(KERN_ERR KS0108_NAME ": ERROR: "
|
||||||
|
"can't claim %i parport, maybe in use\n", ks0108_port);
|
||||||
|
ret = result;
|
||||||
|
goto registered;
|
||||||
|
}
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
|
||||||
|
registered:
|
||||||
|
parport_unregister_device(ks0108_pardevice);
|
||||||
|
|
||||||
|
none:
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
static void __exit ks0108_exit(void)
|
||||||
|
{
|
||||||
|
parport_release(ks0108_pardevice);
|
||||||
|
parport_unregister_device(ks0108_pardevice);
|
||||||
|
}
|
||||||
|
|
||||||
|
module_init(ks0108_init);
|
||||||
|
module_exit(ks0108_exit);
|
||||||
|
|
||||||
|
MODULE_LICENSE("GPL v2");
|
||||||
|
MODULE_AUTHOR("Miguel Ojeda Sandonis <maxextreme@gmail.com>");
|
||||||
|
MODULE_DESCRIPTION("ks0108 LCD Controller driver");
|
||||||
|
|
||||||
77
include/linux/cfag12864b.h
Normal file
77
include/linux/cfag12864b.h
Normal file
@ -0,0 +1,77 @@
|
|||||||
|
/*
|
||||||
|
* Filename: cfag12864b.h
|
||||||
|
* Version: 0.1.0
|
||||||
|
* Description: cfag12864b LCD driver header
|
||||||
|
* License: GPLv2
|
||||||
|
*
|
||||||
|
* Author: Copyright (C) Miguel Ojeda Sandonis <maxextreme@gmail.com>
|
||||||
|
* Date: 2006-10-12
|
||||||
|
*
|
||||||
|
* This program is free software; you can redistribute it and/or modify
|
||||||
|
* it under the terms of the GNU General Public License version 2 as
|
||||||
|
* published by the Free Software Foundation.
|
||||||
|
*
|
||||||
|
* This program is distributed in the hope that it will be useful,
|
||||||
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||||
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||||
|
* GNU General Public License for more details.
|
||||||
|
*
|
||||||
|
* You should have received a copy of the GNU General Public License
|
||||||
|
* along with this program; if not, write to the Free Software
|
||||||
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||||
|
*
|
||||||
|
*/
|
||||||
|
|
||||||
|
#ifndef _CFAG12864B_H_
|
||||||
|
#define _CFAG12864B_H_
|
||||||
|
|
||||||
|
#define CFAG12864B_WIDTH (128)
|
||||||
|
#define CFAG12864B_HEIGHT (64)
|
||||||
|
#define CFAG12864B_CONTROLLERS (2)
|
||||||
|
#define CFAG12864B_PAGES (8)
|
||||||
|
#define CFAG12864B_ADDRESSES (64)
|
||||||
|
#define CFAG12864B_SIZE ((CFAG12864B_CONTROLLERS) * \
|
||||||
|
(CFAG12864B_PAGES) * \
|
||||||
|
(CFAG12864B_ADDRESSES))
|
||||||
|
|
||||||
|
/*
|
||||||
|
* The driver will blit this buffer to the LCD
|
||||||
|
*
|
||||||
|
* Its size is CFAG12864B_SIZE.
|
||||||
|
*/
|
||||||
|
extern unsigned char * cfag12864b_buffer;
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Get the refresh rate of the LCD
|
||||||
|
*
|
||||||
|
* Returns the refresh rate (hertzs).
|
||||||
|
*/
|
||||||
|
extern unsigned int cfag12864b_getrate(void);
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Enable refreshing
|
||||||
|
*
|
||||||
|
* Returns 0 if successful (anyone was using it),
|
||||||
|
* or != 0 if failed (someone is using it).
|
||||||
|
*/
|
||||||
|
extern unsigned char cfag12864b_enable(void);
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Disable refreshing
|
||||||
|
*
|
||||||
|
* You should call this only when you finish using the LCD.
|
||||||
|
*/
|
||||||
|
extern void cfag12864b_disable(void);
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Is enabled refreshing? (is anyone using the module?)
|
||||||
|
*
|
||||||
|
* Returns 0 if refreshing is not enabled (anyone is using it),
|
||||||
|
* or != 0 if refreshing is enabled (someone is using it).
|
||||||
|
*
|
||||||
|
* Useful for buffer read-only modules.
|
||||||
|
*/
|
||||||
|
extern unsigned char cfag12864b_isenabled(void);
|
||||||
|
|
||||||
|
#endif /* _CFAG12864B_H_ */
|
||||||
|
|
||||||
46
include/linux/ks0108.h
Normal file
46
include/linux/ks0108.h
Normal file
@ -0,0 +1,46 @@
|
|||||||
|
/*
|
||||||
|
* Filename: ks0108.h
|
||||||
|
* Version: 0.1.0
|
||||||
|
* Description: ks0108 LCD Controller driver header
|
||||||
|
* License: GPLv2
|
||||||
|
*
|
||||||
|
* Author: Copyright (C) Miguel Ojeda Sandonis <maxextreme@gmail.com>
|
||||||
|
* Date: 2006-10-31
|
||||||
|
*
|
||||||
|
* This program is free software; you can redistribute it and/or modify
|
||||||
|
* it under the terms of the GNU General Public License version 2 as
|
||||||
|
* published by the Free Software Foundation.
|
||||||
|
*
|
||||||
|
* This program is distributed in the hope that it will be useful,
|
||||||
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||||
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||||
|
* GNU General Public License for more details.
|
||||||
|
*
|
||||||
|
* You should have received a copy of the GNU General Public License
|
||||||
|
* along with this program; if not, write to the Free Software
|
||||||
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||||
|
*
|
||||||
|
*/
|
||||||
|
|
||||||
|
#ifndef _KS0108_H_
|
||||||
|
#define _KS0108_H_
|
||||||
|
|
||||||
|
/* Write a byte to the data port */
|
||||||
|
extern void ks0108_writedata(unsigned char byte);
|
||||||
|
|
||||||
|
/* Write a byte to the control port */
|
||||||
|
extern void ks0108_writecontrol(unsigned char byte);
|
||||||
|
|
||||||
|
/* Set the controller's current display state (0..1) */
|
||||||
|
extern void ks0108_displaystate(unsigned char state);
|
||||||
|
|
||||||
|
/* Set the controller's current startline (0..63) */
|
||||||
|
extern void ks0108_startline(unsigned char startline);
|
||||||
|
|
||||||
|
/* Set the controller's current address (0..63) */
|
||||||
|
extern void ks0108_address(unsigned char address);
|
||||||
|
|
||||||
|
/* Set the controller's current page (0..7) */
|
||||||
|
extern void ks0108_page(unsigned char page);
|
||||||
|
|
||||||
|
#endif /* _KS0108_H_ */
|
||||||
Loading…
Reference in New Issue
Block a user