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fbdev: platforming metronomefb and am200epd

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This patch splits metronomefb into the platform independent metronomefb and
the platform dependent am200epd.

Signed-off-by: Jaya Kumar <jayakumar.lkml@gmail.com>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Jaya Kumar 2008-04-28 02:15:38 -07:00 committed by Linus Torvalds
parent 963654a9c9
commit 03c33a4f00
6 changed files with 422 additions and 282 deletions
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16
Documentation/fb/metronomefb.txt
View file

@ -1,7 +1,7 @@
Metronomefb
-----------
Maintained by Jaya Kumar <jayakumar.lkml.gmail.com>
Last revised: Nov 20, 2007
Last revised: Mar 10, 2008
Metronomefb is a driver for the Metronome display controller. The controller
is from E-Ink Corporation. It is intended to be used to drive the E-Ink
@ -11,20 +11,18 @@ display media here http://www.e-ink.com/products/matrix/metronome.html .
Metronome is interfaced to the host CPU through the AMLCD interface. The
host CPU generates the control information and the image in a framebuffer
which is then delivered to the AMLCD interface by a host specific method.
Currently, that's implemented for the PXA's LCDC controller. The display and
error status are each pulled through individual GPIOs.
The display and error status are each pulled through individual GPIOs.
Metronomefb was written for the PXA255/gumstix/lyre combination and
therefore currently has board set specific code in it. If other boards based on
other architectures are available, then the host specific code can be separated
and abstracted out.
Metronomefb is platform independent and depends on a board specific driver
to do all physical IO work. Currently, an example is implemented for the
PXA board used in the AM-200 EPD devkit. This example is am200epd.c
Metronomefb requires waveform information which is delivered via the AMLCD
interface to the metronome controller. The waveform information is expected to
be delivered from userspace via the firmware class interface. The waveform file
can be compressed as long as your udev or hotplug script is aware of the need
to uncompress it before delivering it. metronomefb will ask for waveform.wbf
which would typically go into /lib/firmware/waveform.wbf depending on your
to uncompress it before delivering it. metronomefb will ask for metronome.wbf
which would typically go into /lib/firmware/metronome.wbf depending on your
udev/hotplug setup. I have only tested with a single waveform file which was
originally labeled 23P01201_60_WT0107_MTC. I do not know what it stands for.
Caution should be exercised when manipulating the waveform as there may be

16
drivers/video/Kconfig
View file

@ -173,6 +173,11 @@ config FB_DEFERRED_IO
depends on FB
default y
config FB_METRONOME
tristate
depends on FB
depends on FB_DEFERRED_IO
config FB_SVGALIB
tristate
depends on FB
@ -1927,19 +1932,18 @@ config FB_XILINX
framebuffer. ML300 carries a 640*480 LCD display on the board,
ML403 uses a standard DB15 VGA connector.
config FB_METRONOME
tristate "Metronome display controller support"
config FB_AM200EPD
tristate "AM-200 E-Ink EPD devkit support"
depends on FB && ARCH_PXA && MMU
select FB_SYS_FILLRECT
select FB_SYS_COPYAREA
select FB_SYS_IMAGEBLIT
select FB_SYS_FOPS
select FB_DEFERRED_IO
select FB_METRONOME
help
This enables support for the Metronome display controller. Tested
with an E-Ink 800x600 display and Gumstix Connex through an AMLCD
interface. Please read <file:Documentation/fb/metronomefb.txt>
for more information.
This enables support for the Metronome display controller used on
the E-Ink AM-200 EPD devkit.
config FB_VIRTUAL
tristate "Virtual Frame Buffer support (ONLY FOR TESTING!)"

1
drivers/video/Makefile
View file

@ -29,6 +29,7 @@ obj-$(CONFIG_FB_DEFERRED_IO) += fb_defio.o
# Hardware specific drivers go first
obj-$(CONFIG_FB_AMIGA) += amifb.o c2p.o
obj-$(CONFIG_FB_AM200EPD) += am200epd.o
obj-$(CONFIG_FB_ARC) += arcfb.o
obj-$(CONFIG_FB_CLPS711X) += clps711xfb.o
obj-$(CONFIG_FB_CYBER2000) += cyber2000fb.o

295
drivers/video/am200epd.c Normal file
View file

@ -0,0 +1,295 @@
/*
* linux/drivers/video/am200epd.c -- Platform device for AM200 EPD kit
*
* Copyright (C) 2008, Jaya Kumar
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file COPYING in the main directory of this archive for
* more details.
*
* Layout is based on skeletonfb.c by James Simmons and Geert Uytterhoeven.
*
* This work was made possible by help and equipment support from E-Ink
* Corporation. http://support.eink.com/community
*
* This driver is written to be used with the Metronome display controller.
* on the AM200 EPD prototype kit/development kit with an E-Ink 800x600
* Vizplex EPD on a Gumstix board using the Lyre interface board.
*
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/fb.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/list.h>
#include <linux/uaccess.h>
#include <linux/irq.h>
#include <video/metronomefb.h>
#include <asm/arch/pxa-regs.h>
/* register offsets for gpio control */
#define LED_GPIO_PIN 51
#define STDBY_GPIO_PIN 48
#define RST_GPIO_PIN 49
#define RDY_GPIO_PIN 32
#define ERR_GPIO_PIN 17
#define PCBPWR_GPIO_PIN 16
#define AF_SEL_GPIO_N 0x3
#define GAFR0_U_OFFSET(pin) ((pin - 16) * 2)
#define GAFR1_L_OFFSET(pin) ((pin - 32) * 2)
#define GAFR1_U_OFFSET(pin) ((pin - 48) * 2)
#define GPDR1_OFFSET(pin) (pin - 32)
#define GPCR1_OFFSET(pin) (pin - 32)
#define GPSR1_OFFSET(pin) (pin - 32)
#define GPCR0_OFFSET(pin) (pin)
#define GPSR0_OFFSET(pin) (pin)
static void am200_set_gpio_output(int pin, int val)
{
u8 index;
index = pin >> 4;
switch (index) {
case 1:
if (val)
GPSR0 |= (1 << GPSR0_OFFSET(pin));
else
GPCR0 |= (1 << GPCR0_OFFSET(pin));
break;
case 2:
break;
case 3:
if (val)
GPSR1 |= (1 << GPSR1_OFFSET(pin));
else
GPCR1 |= (1 << GPCR1_OFFSET(pin));
break;
default:
printk(KERN_ERR "unimplemented\n");
}
}
static void __devinit am200_init_gpio_pin(int pin, int dir)
{
u8 index;
/* dir 0 is output, 1 is input
- do 2 things here:
- set gpio alternate function to standard gpio
- set gpio direction to input or output */
index = pin >> 4;
switch (index) {
case 1:
GAFR0_U &= ~(AF_SEL_GPIO_N << GAFR0_U_OFFSET(pin));
if (dir)
GPDR0 &= ~(1 << pin);
else
GPDR0 |= (1 << pin);
break;
case 2:
GAFR1_L &= ~(AF_SEL_GPIO_N << GAFR1_L_OFFSET(pin));
if (dir)
GPDR1 &= ~(1 << GPDR1_OFFSET(pin));
else
GPDR1 |= (1 << GPDR1_OFFSET(pin));
break;
case 3:
GAFR1_U &= ~(AF_SEL_GPIO_N << GAFR1_U_OFFSET(pin));
if (dir)
GPDR1 &= ~(1 << GPDR1_OFFSET(pin));
else
GPDR1 |= (1 << GPDR1_OFFSET(pin));
break;
default:
printk(KERN_ERR "unimplemented\n");
}
}
static void am200_init_gpio_regs(struct metronomefb_par *par)
{
am200_init_gpio_pin(LED_GPIO_PIN, 0);
am200_set_gpio_output(LED_GPIO_PIN, 0);
am200_init_gpio_pin(STDBY_GPIO_PIN, 0);
am200_set_gpio_output(STDBY_GPIO_PIN, 0);
am200_init_gpio_pin(RST_GPIO_PIN, 0);
am200_set_gpio_output(RST_GPIO_PIN, 0);
am200_init_gpio_pin(RDY_GPIO_PIN, 1);
am200_init_gpio_pin(ERR_GPIO_PIN, 1);
am200_init_gpio_pin(PCBPWR_GPIO_PIN, 0);
am200_set_gpio_output(PCBPWR_GPIO_PIN, 0);
}
static void am200_disable_lcd_controller(struct metronomefb_par *par)
{
LCSR = 0xffffffff; /* Clear LCD Status Register */
LCCR0 |= LCCR0_DIS; /* Disable LCD Controller */
/* we reset and just wait for things to settle */
msleep(200);
}
static void am200_enable_lcd_controller(struct metronomefb_par *par)
{
LCSR = 0xffffffff;
FDADR0 = par->metromem_desc_dma;
LCCR0 |= LCCR0_ENB;
}
static void am200_init_lcdc_regs(struct metronomefb_par *par)
{
/* here we do:
- disable the lcd controller
- setup lcd control registers
- setup dma descriptor
- reenable lcd controller
*/
/* disable the lcd controller */
am200_disable_lcd_controller(par);
/* setup lcd control registers */
LCCR0 = LCCR0_LDM | LCCR0_SFM | LCCR0_IUM | LCCR0_EFM | LCCR0_PAS
| LCCR0_QDM | LCCR0_BM | LCCR0_OUM;
LCCR1 = (par->info->var.xres/2 - 1) /* pixels per line */
| (27 << 10) /* hsync pulse width - 1 */
| (33 << 16) /* eol pixel count */
| (33 << 24); /* bol pixel count */
LCCR2 = (par->info->var.yres - 1) /* lines per panel */
| (24 << 10) /* vsync pulse width - 1 */
| (2 << 16) /* eof pixel count */
| (0 << 24); /* bof pixel count */
LCCR3 = 2 /* pixel clock divisor */
| (24 << 8) /* AC Bias pin freq */
| LCCR3_16BPP /* BPP */
| LCCR3_PCP; /* PCP falling edge */
}
static void am200_post_dma_setup(struct metronomefb_par *par)
{
par->metromem_desc->mFDADR0 = par->metromem_desc_dma;
par->metromem_desc->mFSADR0 = par->metromem_dma;
par->metromem_desc->mFIDR0 = 0;
par->metromem_desc->mLDCMD0 = par->info->var.xres
* par->info->var.yres;
am200_enable_lcd_controller(par);
}
static void am200_free_irq(struct fb_info *info)
{
free_irq(IRQ_GPIO(RDY_GPIO_PIN), info);
}
static irqreturn_t am200_handle_irq(int irq, void *dev_id)
{
struct fb_info *info = dev_id;
struct metronomefb_par *par = info->par;
wake_up_interruptible(&par->waitq);
return IRQ_HANDLED;
}
static int am200_setup_irq(struct fb_info *info)
{
int retval;
retval = request_irq(IRQ_GPIO(RDY_GPIO_PIN), am200_handle_irq,
IRQF_DISABLED, "AM200", info);
if (retval) {
printk(KERN_ERR "am200epd: request_irq failed: %d\n", retval);
return retval;
}
return set_irq_type(IRQ_GPIO(RDY_GPIO_PIN), IRQT_FALLING);
}
static void am200_set_rst(struct metronomefb_par *par, int state)
{
am200_set_gpio_output(RST_GPIO_PIN, state);
}
static void am200_set_stdby(struct metronomefb_par *par, int state)
{
am200_set_gpio_output(STDBY_GPIO_PIN, state);
}
static int am200_wait_event(struct metronomefb_par *par)
{
return wait_event_timeout(par->waitq, (GPLR1 & 0x01), HZ);
}
static int am200_wait_event_intr(struct metronomefb_par *par)
{
return wait_event_interruptible_timeout(par->waitq, (GPLR1 & 0x01), HZ);
}
static struct metronome_board am200_board = {
.owner = THIS_MODULE,
.free_irq = am200_free_irq,
.setup_irq = am200_setup_irq,
.init_gpio_regs = am200_init_gpio_regs,
.init_lcdc_regs = am200_init_lcdc_regs,
.post_dma_setup = am200_post_dma_setup,
.set_rst = am200_set_rst,
.set_stdby = am200_set_stdby,
.met_wait_event = am200_wait_event,
.met_wait_event_intr = am200_wait_event_intr,
};
static struct platform_device *am200_device;
static int __init am200_init(void)
{
int ret;
/* request our platform independent driver */
request_module("metronomefb");
am200_device = platform_device_alloc("metronomefb", -1);
if (!am200_device)
return -ENOMEM;
platform_device_add_data(am200_device, &am200_board,
sizeof(am200_board));
/* this _add binds metronomefb to am200. metronomefb refcounts am200 */
ret = platform_device_add(am200_device);
if (ret)
platform_device_put(am200_device);
return ret;
}
static void __exit am200_exit(void)
{
platform_device_unregister(am200_device);
}
module_init(am200_init);
module_exit(am200_exit);
MODULE_DESCRIPTION("board driver for am200 metronome epd kit");
MODULE_AUTHOR("Jaya Kumar");
MODULE_LICENSE("GPL");

314
drivers/video/metronomefb.c
View file

@ -13,12 +13,10 @@
* Corporation. http://support.eink.com/community
*
* This driver is written to be used with the Metronome display controller.
* It was tested with an E-Ink 800x600 Vizplex EPD on a Gumstix Connex board
* using the Lyre interface board.
* It is intended to be architecture independent. A board specific driver
* must be used to perform all the physical IO interactions. An example
* is provided as am200epd.c
*
* General notes:
* - User must set metronomefb_enable=1 to enable it.
* - See Documentation/fb/metronomefb.txt for how metronome works.
*/
#include <linux/module.h>
#include <linux/kernel.h>
@ -38,9 +36,11 @@
#include <linux/uaccess.h>
#include <linux/irq.h>
#include <asm/arch/pxa-regs.h>
#include <video/metronomefb.h>
#include <asm/unaligned.h>
#define DEBUG 1
#ifdef DEBUG
#define DPRINTK(f, a...) printk(KERN_DEBUG "%s: " f, __func__ , ## a)
@ -53,35 +53,6 @@
#define DPY_W 832
#define DPY_H 622
struct metromem_desc {
u32 mFDADR0;
u32 mFSADR0;
u32 mFIDR0;
u32 mLDCMD0;
};
struct metromem_cmd {
u16 opcode;
u16 args[((64-2)/2)];
u16 csum;
};
struct metronomefb_par {
unsigned char *metromem;
struct metromem_desc *metromem_desc;
struct metromem_cmd *metromem_cmd;
unsigned char *metromem_wfm;
unsigned char *metromem_img;
u16 *metromem_img_csum;
u16 *csum_table;
int metromemsize;
dma_addr_t metromem_dma;
dma_addr_t metromem_desc_dma;
struct fb_info *info;
wait_queue_head_t waitq;
u8 frame_count;
};
/* frame differs from image. frame includes non-visible pixels */
struct epd_frame {
int fw; /* frame width */
@ -120,8 +91,7 @@ static struct fb_var_screeninfo metronomefb_var __devinitdata = {
.transp = { 0, 0, 0 },
};
static unsigned int metronomefb_enable;
/* the waveform structure that is coming from userspace firmware */
struct waveform_hdr {
u8 stuff[32];
@ -301,165 +271,6 @@ static int load_waveform(u8 *mem, size_t size, u8 *metromem, int m, int t,
return 0;
}
/* register offsets for gpio control */
#define LED_GPIO_PIN 51
#define STDBY_GPIO_PIN 48
#define RST_GPIO_PIN 49
#define RDY_GPIO_PIN 32
#define ERR_GPIO_PIN 17
#define PCBPWR_GPIO_PIN 16
#define AF_SEL_GPIO_N 0x3
#define GAFR0_U_OFFSET(pin) ((pin - 16) * 2)
#define GAFR1_L_OFFSET(pin) ((pin - 32) * 2)
#define GAFR1_U_OFFSET(pin) ((pin - 48) * 2)
#define GPDR1_OFFSET(pin) (pin - 32)
#define GPCR1_OFFSET(pin) (pin - 32)
#define GPSR1_OFFSET(pin) (pin - 32)
#define GPCR0_OFFSET(pin) (pin)
#define GPSR0_OFFSET(pin) (pin)
static void metronome_set_gpio_output(int pin, int val)
{
u8 index;
index = pin >> 4;
switch (index) {
case 1:
if (val)
GPSR0 |= (1 << GPSR0_OFFSET(pin));
else
GPCR0 |= (1 << GPCR0_OFFSET(pin));
break;
case 2:
break;
case 3:
if (val)
GPSR1 |= (1 << GPSR1_OFFSET(pin));
else
GPCR1 |= (1 << GPCR1_OFFSET(pin));
break;
default:
printk(KERN_ERR "unimplemented\n");
}
}
static void __devinit metronome_init_gpio_pin(int pin, int dir)
{
u8 index;
/* dir 0 is output, 1 is input
- do 2 things here:
- set gpio alternate function to standard gpio
- set gpio direction to input or output */
index = pin >> 4;
switch (index) {
case 1:
GAFR0_U &= ~(AF_SEL_GPIO_N << GAFR0_U_OFFSET(pin));
if (dir)
GPDR0 &= ~(1 << pin);
else
GPDR0 |= (1 << pin);
break;
case 2:
GAFR1_L &= ~(AF_SEL_GPIO_N << GAFR1_L_OFFSET(pin));
if (dir)
GPDR1 &= ~(1 << GPDR1_OFFSET(pin));
else
GPDR1 |= (1 << GPDR1_OFFSET(pin));
break;
case 3:
GAFR1_U &= ~(AF_SEL_GPIO_N << GAFR1_U_OFFSET(pin));
if (dir)
GPDR1 &= ~(1 << GPDR1_OFFSET(pin));
else
GPDR1 |= (1 << GPDR1_OFFSET(pin));
break;
default:
printk(KERN_ERR "unimplemented\n");
}
}
static void __devinit metronome_init_gpio_regs(void)
{
metronome_init_gpio_pin(LED_GPIO_PIN, 0);
metronome_set_gpio_output(LED_GPIO_PIN, 0);
metronome_init_gpio_pin(STDBY_GPIO_PIN, 0);
metronome_set_gpio_output(STDBY_GPIO_PIN, 0);
metronome_init_gpio_pin(RST_GPIO_PIN, 0);
metronome_set_gpio_output(RST_GPIO_PIN, 0);
metronome_init_gpio_pin(RDY_GPIO_PIN, 1);
metronome_init_gpio_pin(ERR_GPIO_PIN, 1);
metronome_init_gpio_pin(PCBPWR_GPIO_PIN, 0);
metronome_set_gpio_output(PCBPWR_GPIO_PIN, 0);
}
static void metronome_disable_lcd_controller(struct metronomefb_par *par)
{
LCSR = 0xffffffff; /* Clear LCD Status Register */
LCCR0 |= LCCR0_DIS; /* Disable LCD Controller */
/* we reset and just wait for things to settle */
msleep(200);
}
static void metronome_enable_lcd_controller(struct metronomefb_par *par)
{
LCSR = 0xffffffff;
FDADR0 = par->metromem_desc_dma;
LCCR0 |= LCCR0_ENB;
}
static void __devinit metronome_init_lcdc_regs(struct metronomefb_par *par)
{
/* here we do:
- disable the lcd controller
- setup lcd control registers
- setup dma descriptor
- reenable lcd controller
*/
/* disable the lcd controller */
metronome_disable_lcd_controller(par);
/* setup lcd control registers */
LCCR0 = LCCR0_LDM | LCCR0_SFM | LCCR0_IUM | LCCR0_EFM | LCCR0_PAS
| LCCR0_QDM | LCCR0_BM | LCCR0_OUM;
LCCR1 = (epd_frame_table[0].fw/2 - 1) /* pixels per line */
| (27 << 10) /* hsync pulse width - 1 */
| (33 << 16) /* eol pixel count */
| (33 << 24); /* bol pixel count */
LCCR2 = (epd_frame_table[0].fh - 1) /* lines per panel */
| (24 << 10) /* vsync pulse width - 1 */
| (2 << 16) /* eof pixel count */
| (0 << 24); /* bof pixel count */
LCCR3 = 2 /* pixel clock divisor */
| (24 << 8) /* AC Bias pin freq */
| LCCR3_16BPP /* BPP */
| LCCR3_PCP; /* PCP falling edge */
/* setup dma descriptor */
par->metromem_desc->mFDADR0 = par->metromem_desc_dma;
par->metromem_desc->mFSADR0 = par->metromem_dma;
par->metromem_desc->mFIDR0 = 0;
par->metromem_desc->mLDCMD0 = epd_frame_table[0].fw
* epd_frame_table[0].fh;
/* reenable lcd controller */
metronome_enable_lcd_controller(par);
}
static int metronome_display_cmd(struct metronomefb_par *par)
{
int i;
@ -493,8 +304,7 @@ static int metronome_display_cmd(struct metronomefb_par *par)
par->metromem_cmd->csum = cs;
par->metromem_cmd->opcode = opcode; /* display cmd */
i = wait_event_interruptible_timeout(par->waitq, (GPLR1 & 0x01), HZ);
return i;
return par->board->met_wait_event_intr(par);
}
static int __devinit metronome_powerup_cmd(struct metronomefb_par *par)
@ -518,13 +328,12 @@ static int __devinit metronome_powerup_cmd(struct metronomefb_par *par)
par->metromem_cmd->csum = cs;
msleep(1);
metronome_set_gpio_output(RST_GPIO_PIN, 1);
par->board->set_rst(par, 1);
msleep(1);
metronome_set_gpio_output(STDBY_GPIO_PIN, 1);
par->board->set_stdby(par, 1);
i = wait_event_timeout(par->waitq, (GPLR1 & 0x01), HZ);
return i;
return par->board->met_wait_event(par);
}
static int __devinit metronome_config_cmd(struct metronomefb_par *par)
@ -569,8 +378,7 @@ static int __devinit metronome_config_cmd(struct metronomefb_par *par)
par->metromem_cmd->csum = cs;
par->metromem_cmd->opcode = 0xCC10; /* config cmd */
i = wait_event_timeout(par->waitq, (GPLR1 & 0x01), HZ);
return i;
return par->board->met_wait_event(par);
}
static int __devinit metronome_init_cmd(struct metronomefb_par *par)
@ -596,16 +404,19 @@ static int __devinit metronome_init_cmd(struct metronomefb_par *par)
par->metromem_cmd->csum = cs;
par->metromem_cmd->opcode = 0xCC20; /* init cmd */
i = wait_event_timeout(par->waitq, (GPLR1 & 0x01), HZ);
return i;
return par->board->met_wait_event(par);
}
static int __devinit metronome_init_regs(struct metronomefb_par *par)
{
int res;
metronome_init_gpio_regs();
metronome_init_lcdc_regs(par);
par->board->init_gpio_regs(par);
par->board->init_lcdc_regs(par);
/* now that lcd is setup, setup dma descriptor */
par->board->post_dma_setup(par);
res = metronome_powerup_cmd(par);
if (res)
@ -616,8 +427,6 @@ static int __devinit metronome_init_regs(struct metronomefb_par *par)
return res;
res = metronome_init_cmd(par);
if (res)
return res;
return res;
}
@ -632,7 +441,7 @@ static void metronomefb_dpy_update(struct metronomefb_par *par)
cksum = calc_img_cksum((u16 *) par->metromem_img,
(epd_frame_table[0].fw * DPY_H)/2);
*((u16 *) (par->metromem_img) +
*((u16 *)(par->metromem_img) +
(epd_frame_table[0].fw * DPY_H)/2) = cksum;
metronome_display_cmd(par);
}
@ -641,8 +450,8 @@ static u16 metronomefb_dpy_update_page(struct metronomefb_par *par, int index)
{
int i;
u16 csum = 0;
u16 *buf = (u16 __force *) (par->info->screen_base + index);
u16 *img = (u16 *) (par->metromem_img + index);
u16 *buf = (u16 __force *)(par->info->screen_base + index);
u16 *img = (u16 *)(par->metromem_img + index);
/* swizzle from vm to metromem and recalc cksum at the same time*/
for (i = 0; i < PAGE_SIZE/2; i++) {
@ -733,7 +542,7 @@ static ssize_t metronomefb_write(struct fb_info *info, const char __user *buf,
count = total_size - p;
}
dst = (void __force *) (info->screen_base + p);
dst = (void __force *)(info->screen_base + p);
if (copy_from_user(dst, buf, count))
err = -EFAULT;
@ -759,18 +568,10 @@ static struct fb_deferred_io metronomefb_defio = {
.deferred_io = metronomefb_dpy_deferred_io,
};
static irqreturn_t metronome_handle_irq(int irq, void *dev_id)
{
struct fb_info *info = dev_id;
struct metronomefb_par *par = info->par;
wake_up_interruptible(&par->waitq);
return IRQ_HANDLED;
}
static int __devinit metronomefb_probe(struct platform_device *dev)
{
struct fb_info *info;
struct metronome_board *board;
int retval = -ENOMEM;
int videomemorysize;
unsigned char *videomemory;
@ -779,17 +580,26 @@ static int __devinit metronomefb_probe(struct platform_device *dev)
int cmd_size, wfm_size, img_size, padding_size, totalsize;
int i;
/* pick up board specific routines */
board = dev->dev.platform_data;
if (!board)
return -EINVAL;
/* try to count device specific driver, if can't, platform recalls */
if (!try_module_get(board->owner))
return -ENODEV;
/* we have two blocks of memory.
info->screen_base which is vm, and is the fb used by apps.
par->metromem which is physically contiguous memory and
contains the display controller commands, waveform,
processed image data and padding. this is the data pulled
by the pxa255's LCD controller and pushed to Metronome */
by the device's LCD controller and pushed to Metronome */
videomemorysize = (DPY_W*DPY_H);
videomemory = vmalloc(videomemorysize);
if (!videomemory)
return retval;
return -ENOMEM;
memset(videomemory, 0, videomemorysize);
@ -797,7 +607,7 @@ static int __devinit metronomefb_probe(struct platform_device *dev)
if (!info)
goto err_vfree;
info->screen_base = (char __iomem *) videomemory;
info->screen_base = (char __force __iomem *)videomemory;
info->fbops = &metronomefb_ops;
info->var = metronomefb_var;
@ -805,6 +615,7 @@ static int __devinit metronomefb_probe(struct platform_device *dev)
info->fix.smem_len = videomemorysize;
par = info->par;
par->info = info;
par->board = board;
init_waitqueue_head(&par->waitq);
/* this table caches per page csum values. */
@ -849,11 +660,10 @@ static int __devinit metronomefb_probe(struct platform_device *dev)
par->metromem_desc_dma = par->metromem_dma + cmd_size + wfm_size
+ img_size + padding_size;
/* load the waveform in. assume mode 3, temp 31 for now */
/* a) request the waveform file from userspace
/* load the waveform in. assume mode 3, temp 31 for now
a) request the waveform file from userspace
b) process waveform and decode into metromem */
retval = request_firmware(&fw_entry, "waveform.wbf", &dev->dev);
retval = request_firmware(&fw_entry, "metronome.wbf", &dev->dev);
if (retval < 0) {
printk(KERN_ERR "metronomefb: couldn't get waveform\n");
goto err_dma_free;
@ -867,13 +677,8 @@ static int __devinit metronomefb_probe(struct platform_device *dev)
}
release_firmware(fw_entry);
retval = request_irq(IRQ_GPIO(RDY_GPIO_PIN), metronome_handle_irq,
IRQF_DISABLED, "Metronome", info);
if (retval) {
dev_err(&dev->dev, "request_irq failed: %d\n", retval);
if (board->setup_irq(info))
goto err_ld_wfm;
}
set_irq_type(IRQ_GPIO(RDY_GPIO_PIN), IRQT_FALLING);
retval = metronome_init_regs(par);
if (retval < 0)
@ -913,7 +718,7 @@ err_cmap:
err_fb_rel:
framebuffer_release(info);
err_free_irq:
free_irq(IRQ_GPIO(RDY_GPIO_PIN), info);
board->free_irq(info);
err_ld_wfm:
release_firmware(fw_entry);
err_dma_free:
@ -923,6 +728,7 @@ err_csum_table:
vfree(par->csum_table);
err_vfree:
vfree(videomemory);
module_put(board->owner);
return retval;
}
@ -939,7 +745,8 @@ static int __devexit metronomefb_remove(struct platform_device *dev)
vfree(par->csum_table);
unregister_framebuffer(info);
vfree((void __force *)info->screen_base);
free_irq(IRQ_GPIO(RDY_GPIO_PIN), info);
par->board->free_irq(info);
module_put(par->board->owner);
framebuffer_release(info);
}
return 0;
@ -949,48 +756,21 @@ static struct platform_driver metronomefb_driver = {
.probe = metronomefb_probe,
.remove = metronomefb_remove,
.driver = {
.owner = THIS_MODULE,
.name = "metronomefb",
},
};
static struct platform_device *metronomefb_device;
static int __init metronomefb_init(void)
{
int ret;
if (!metronomefb_enable) {
printk(KERN_ERR
"Use metronomefb_enable to enable the device\n");
return -ENXIO;
}
ret = platform_driver_register(&metronomefb_driver);
if (!ret) {
metronomefb_device = platform_device_alloc("metronomefb", 0);
if (metronomefb_device)
ret = platform_device_add(metronomefb_device);
else
ret = -ENOMEM;
if (ret) {
platform_device_put(metronomefb_device);
platform_driver_unregister(&metronomefb_driver);
}
}
return ret;
return platform_driver_register(&metronomefb_driver);
}
static void __exit metronomefb_exit(void)
{
platform_device_unregister(metronomefb_device);
platform_driver_unregister(&metronomefb_driver);
}
module_param(metronomefb_enable, uint, 0);
MODULE_PARM_DESC(metronomefb_enable, "Enable communication with Metronome");
module_init(metronomefb_init);
module_exit(metronomefb_exit);

62
include/video/metronomefb.h Normal file
View file

@ -0,0 +1,62 @@
/*
* metronomefb.h - definitions for the metronome framebuffer driver
*
* Copyright (C) 2008 by Jaya Kumar
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file COPYING in the main directory of this archive for
* more details.
*
*/
#ifndef _LINUX_METRONOMEFB_H_
#define _LINUX_METRONOMEFB_H_
/* address and control descriptors used by metronome controller */
struct metromem_desc {
u32 mFDADR0;
u32 mFSADR0;
u32 mFIDR0;
u32 mLDCMD0;
};
/* command structure used by metronome controller */
struct metromem_cmd {
u16 opcode;
u16 args[((64-2)/2)];
u16 csum;
};
/* struct used by metronome. board specific stuff comes from *board */
struct metronomefb_par {
unsigned char *metromem;
struct metromem_desc *metromem_desc;
struct metromem_cmd *metromem_cmd;
unsigned char *metromem_wfm;
unsigned char *metromem_img;
u16 *metromem_img_csum;
u16 *csum_table;
int metromemsize;
dma_addr_t metromem_dma;
dma_addr_t metromem_desc_dma;
struct fb_info *info;
struct metronome_board *board;
wait_queue_head_t waitq;
u8 frame_count;
};
/* board specific routines */
struct metronome_board {
struct module *owner;
void (*free_irq)(struct fb_info *);
void (*init_gpio_regs)(struct metronomefb_par *);
void (*init_lcdc_regs)(struct metronomefb_par *);
void (*post_dma_setup)(struct metronomefb_par *);
void (*set_rst)(struct metronomefb_par *, int);
void (*set_stdby)(struct metronomefb_par *, int);
int (*met_wait_event)(struct metronomefb_par *);
int (*met_wait_event_intr)(struct metronomefb_par *);
int (*setup_irq)(struct fb_info *);
};
#endif