diff options
| -rw-r--r-- | arch/arm/mach-pxa/Kconfig | 3 | ||||
| -rw-r--r-- | arch/arm/mach-pxa/Makefile | 1 | ||||
| -rw-r--r-- | arch/arm/mach-pxa/am200epd.c | 374 | ||||
| -rw-r--r-- | drivers/video/Kconfig | 13 | ||||
| -rw-r--r-- | drivers/video/Makefile | 1 | ||||
| -rw-r--r-- | drivers/video/am200epd.c | 295 |
6 files changed, 378 insertions, 309 deletions
diff --git a/arch/arm/mach-pxa/Kconfig b/arch/arm/mach-pxa/Kconfig index e8ee7ec9ff6..2c4851a3530 100644 --- a/arch/arm/mach-pxa/Kconfig +++ b/arch/arm/mach-pxa/Kconfig @@ -256,6 +256,9 @@ config PCM990_DISPLAY_NONE endchoice +config MACH_AM200EPD + depends on MACH_GUMSTIX_F + bool "Enable AM200EPD board support" config PXA_EZX bool "Motorola EZX Platform" diff --git a/arch/arm/mach-pxa/Makefile b/arch/arm/mach-pxa/Makefile index 99ecbe7f850..ccbe1b08f88 100644 --- a/arch/arm/mach-pxa/Makefile +++ b/arch/arm/mach-pxa/Makefile @@ -22,6 +22,7 @@ obj-$(CONFIG_CPU_PXA930) += pxa930.o # Specific board support obj-$(CONFIG_ARCH_GUMSTIX) += gumstix.o +obj-$(CONFIG_MACH_AM200EPD) += am200epd.o obj-$(CONFIG_ARCH_LUBBOCK) += lubbock.o obj-$(CONFIG_MACH_LOGICPD_PXA270) += lpd270.o obj-$(CONFIG_MACH_MAINSTONE) += mainstone.o diff --git a/arch/arm/mach-pxa/am200epd.c b/arch/arm/mach-pxa/am200epd.c new file mode 100644 index 00000000000..b965085a37b --- /dev/null +++ b/arch/arm/mach-pxa/am200epd.c @@ -0,0 +1,374 @@ +/* + * 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/irq.h> +#include <linux/gpio.h> + +#include <mach/pxafb.h> + +#include <video/metronomefb.h> + +static unsigned int panel_type = 6; +static struct platform_device *am200_device; +static struct metronome_board am200_board; + +static struct pxafb_mode_info am200_fb_mode_9inch7 = { + .pixclock = 40000, + .xres = 1200, + .yres = 842, + .bpp = 16, + .hsync_len = 2, + .left_margin = 2, + .right_margin = 2, + .vsync_len = 1, + .upper_margin = 2, + .lower_margin = 25, + .sync = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, +}; + +static struct pxafb_mode_info am200_fb_mode_8inch = { + .pixclock = 40000, + .xres = 1088, + .yres = 791, + .bpp = 16, + .hsync_len = 28, + .left_margin = 8, + .right_margin = 30, + .vsync_len = 8, + .upper_margin = 10, + .lower_margin = 8, + .sync = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, +}; + +static struct pxafb_mode_info am200_fb_mode_6inch = { + .pixclock = 40189, + .xres = 832, + .yres = 622, + .bpp = 16, + .hsync_len = 28, + .left_margin = 34, + .right_margin = 34, + .vsync_len = 25, + .upper_margin = 0, + .lower_margin = 2, + .sync = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, +}; + +static struct pxafb_mach_info am200_fb_info = { + .modes = &am200_fb_mode_6inch, + .num_modes = 1, + .lcd_conn = LCD_TYPE_COLOR_TFT | LCD_PCLK_EDGE_FALL | + LCD_AC_BIAS_FREQ(24), +}; + +/* 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 +static int gpios[] = { LED_GPIO_PIN , STDBY_GPIO_PIN , RST_GPIO_PIN, + RDY_GPIO_PIN, ERR_GPIO_PIN, PCBPWR_GPIO_PIN }; +static char *gpio_names[] = { "LED" , "STDBY" , "RST", "RDY", "ERR", "PCBPWR" }; + +static int am200_init_gpio_regs(struct metronomefb_par *par) +{ + int i; + int err; + + for (i = 0; i < ARRAY_SIZE(gpios); i++) { + err = gpio_request(gpios[i], gpio_names[i]); + if (err) { + dev_err(&am200_device->dev, "failed requesting " + "gpio %s, err=%d\n", gpio_names[i], err); + goto err_req_gpio; + } + } + + gpio_direction_output(LED_GPIO_PIN, 0); + gpio_direction_output(STDBY_GPIO_PIN, 0); + gpio_direction_output(RST_GPIO_PIN, 0); + + gpio_direction_input(RDY_GPIO_PIN); + gpio_direction_input(ERR_GPIO_PIN); + + gpio_direction_output(PCBPWR_GPIO_PIN, 0); + + return 0; + +err_req_gpio: + while (i > 0) + gpio_free(gpios[i--]); + + return err; +} + +static void am200_cleanup(struct metronomefb_par *par) +{ + int i; + + free_irq(IRQ_GPIO(RDY_GPIO_PIN), par); + + for (i = 0; i < ARRAY_SIZE(gpios); i++) + gpio_free(gpios[i]); +} + +static int am200_share_video_mem(struct fb_info *info) +{ + /* rough check if this is our desired fb and not something else */ + if ((info->var.xres != am200_fb_info.modes->xres) + || (info->var.yres != am200_fb_info.modes->yres)) + return 0; + + /* we've now been notified that we have our new fb */ + am200_board.metromem = info->screen_base; + am200_board.host_fbinfo = info; + + /* try to refcount host drv since we are the consumer after this */ + if (!try_module_get(info->fbops->owner)) + return -ENODEV; + + return 0; +} + +static int am200_unshare_video_mem(struct fb_info *info) +{ + dev_dbg(&am200_device->dev, "ENTER %s\n", __func__); + + if (info != am200_board.host_fbinfo) + return 0; + + module_put(am200_board.host_fbinfo->fbops->owner); + return 0; +} + +static int am200_fb_notifier_callback(struct notifier_block *self, + unsigned long event, void *data) +{ + struct fb_event *evdata = data; + struct fb_info *info = evdata->info; + + dev_dbg(&am200_device->dev, "ENTER %s\n", __func__); + + if (event == FB_EVENT_FB_REGISTERED) + return am200_share_video_mem(info); + else if (event == FB_EVENT_FB_UNREGISTERED) + return am200_unshare_video_mem(info); + + return 0; +} + +static struct notifier_block am200_fb_notif = { + .notifier_call = am200_fb_notifier_callback, +}; + +/* this gets called as part of our init. these steps must be done now so + * that we can use set_pxa_fb_info */ +static void __init am200_presetup_fb(void) +{ + int fw; + int fh; + int padding_size; + int totalsize; + + switch (panel_type) { + case 6: + am200_fb_info.modes = &am200_fb_mode_6inch; + break; + case 8: + am200_fb_info.modes = &am200_fb_mode_8inch; + break; + case 97: + am200_fb_info.modes = &am200_fb_mode_9inch7; + break; + default: + dev_err(&am200_device->dev, "invalid panel_type selection," + " setting to 6\n"); + am200_fb_info.modes = &am200_fb_mode_6inch; + break; + } + + /* the frame buffer is divided as follows: + command | CRC | padding + 16kb waveform data | CRC | padding + image data | CRC + */ + + fw = am200_fb_info.modes->xres; + fh = am200_fb_info.modes->yres; + + /* waveform must be 16k + 2 for checksum */ + am200_board.wfm_size = roundup(16*1024 + 2, fw); + + padding_size = PAGE_SIZE + (4 * fw); + + /* total is 1 cmd , 1 wfm, padding and image */ + totalsize = fw + am200_board.wfm_size + padding_size + (fw*fh); + + /* save this off because we're manipulating fw after this and + * we'll need it when we're ready to setup the framebuffer */ + am200_board.fw = fw; + am200_board.fh = fh; + + /* the reason we do this adjustment is because we want to acquire + * more framebuffer memory without imposing custom awareness on the + * underlying pxafb driver */ + am200_fb_info.modes->yres = DIV_ROUND_UP(totalsize, fw); + + /* we divide since we told the LCD controller we're 16bpp */ + am200_fb_info.modes->xres /= 2; + + set_pxa_fb_info(&am200_fb_info); + +} + +/* this gets called by metronomefb as part of its init, in our case, we + * have already completed initial framebuffer init in presetup_fb so we + * can just setup the fb access pointers */ +static int am200_setup_fb(struct metronomefb_par *par) +{ + int fw; + int fh; + + fw = am200_board.fw; + fh = am200_board.fh; + + /* metromem was set up by the notifier in share_video_mem so now + * we can use its value to calculate the other entries */ + par->metromem_cmd = (struct metromem_cmd *) am200_board.metromem; + par->metromem_wfm = am200_board.metromem + fw; + par->metromem_img = par->metromem_wfm + am200_board.wfm_size; + par->metromem_img_csum = (u16 *) (par->metromem_img + (fw * fh)); + par->metromem_dma = am200_board.host_fbinfo->fix.smem_start; + + return 0; +} + +static int am200_get_panel_type(void) +{ + return panel_type; +} + +static irqreturn_t am200_handle_irq(int irq, void *dev_id) +{ + struct metronomefb_par *par = dev_id; + + wake_up_interruptible(&par->waitq); + return IRQ_HANDLED; +} + +static int am200_setup_irq(struct fb_info *info) +{ + int ret; + + ret = request_irq(IRQ_GPIO(RDY_GPIO_PIN), am200_handle_irq, + IRQF_DISABLED|IRQF_TRIGGER_FALLING, + "AM200", info->par); + if (ret) + dev_err(&am200_device->dev, "request_irq failed: %d\n", ret); + + return ret; +} + +static void am200_set_rst(struct metronomefb_par *par, int state) +{ + gpio_set_value(RST_GPIO_PIN, state); +} + +static void am200_set_stdby(struct metronomefb_par *par, int state) +{ + gpio_set_value(STDBY_GPIO_PIN, state); +} + +static int am200_wait_event(struct metronomefb_par *par) +{ + return wait_event_timeout(par->waitq, gpio_get_value(RDY_GPIO_PIN), HZ); +} + +static int am200_wait_event_intr(struct metronomefb_par *par) +{ + return wait_event_interruptible_timeout(par->waitq, + gpio_get_value(RDY_GPIO_PIN), HZ); +} + +static struct metronome_board am200_board = { + .owner = THIS_MODULE, + .setup_irq = am200_setup_irq, + .setup_io = am200_init_gpio_regs, + .setup_fb = am200_setup_fb, + .set_rst = am200_set_rst, + .set_stdby = am200_set_stdby, + .met_wait_event = am200_wait_event, + .met_wait_event_intr = am200_wait_event_intr, + .get_panel_type = am200_get_panel_type, + .cleanup = am200_cleanup, +}; + +static int __init am200_init(void) +{ + int ret; + + /* before anything else, we request notification for any fb + * creation events */ + fb_register_client(&am200_fb_notif); + + /* request our platform independent driver */ + request_module("metronomefb"); + + am200_device = platform_device_alloc("metronomefb", -1); + if (!am200_device) + return -ENOMEM; + + /* the am200_board that will be seen by metronomefb is a copy */ + 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); + fb_unregister_client(&am200_fb_notif); + return ret; + } + + am200_presetup_fb(); + + return 0; +} + +module_param(panel_type, uint, 0); +MODULE_PARM_DESC(panel_type, "Select the panel type: 6, 8, 97"); + +module_init(am200_init); + +MODULE_DESCRIPTION("board driver for am200 metronome epd kit"); +MODULE_AUTHOR("Jaya Kumar"); +MODULE_LICENSE("GPL"); diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig index 6fd4a2f63cf..d85a74c64b5 100644 --- a/drivers/video/Kconfig +++ b/drivers/video/Kconfig @@ -1969,19 +1969,6 @@ config FB_XILINX framebuffer. ML300 carries a 640*480 LCD display on the board, ML403 uses a standard DB15 VGA connector. -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 used on - the E-Ink AM-200 EPD devkit. - config FB_COBALT tristate "Cobalt server LCD frame buffer support" depends on FB && MIPS_COBALT diff --git a/drivers/video/Makefile b/drivers/video/Makefile index a6b55297a7f..ad0330bf9be 100644 --- a/drivers/video/Makefile +++ b/drivers/video/Makefile @@ -29,7 +29,6 @@ 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 diff --git a/drivers/video/am200epd.c b/drivers/video/am200epd.c deleted file mode 100644 index 0c35b8b0160..00000000000 --- a/drivers/video/am200epd.c +++ /dev/null @@ -1,295 +0,0 @@ -/* - * 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 <mach/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), IRQ_TYPE_EDGE_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"); |