| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Jaya Kumar | 1425 | 99.16% | 3 | 33.33% |
| Russell King | 4 | 0.28% | 1 | 11.11% |
| Arnd Bergmann | 3 | 0.21% | 2 | 22.22% |
| Haojian Zhuang | 2 | 0.14% | 1 | 11.11% |
| Axel Lin | 2 | 0.14% | 1 | 11.11% |
| Daniel Vetter | 1 | 0.07% | 1 | 11.11% |
| Total | 1437 | 9 |
/* * 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 "pxa25x.h" #include "gumstix.h" #include <linux/platform_data/video-pxafb.h> #include "generic.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(PXA_GPIO_TO_IRQ(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 pxa_set_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; pxa_set_fb_info(NULL, &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(PXA_GPIO_TO_IRQ(RDY_GPIO_PIN), am200_handle_irq, 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 unsigned long am200_pin_config[] __initdata = { GPIO51_GPIO, GPIO49_GPIO, GPIO48_GPIO, GPIO32_GPIO, GPIO17_GPIO, GPIO16_GPIO, }; int __init am200_init(void) { int ret; /* * Before anything else, we request notification for any fb * creation events. * * FIXME: This is terrible and needs to be nuked. The notifier is used * to get at the fb base address from the boot splash fb driver, which * is then passed to metronomefb. Instaed of metronomfb or this board * support file here figuring this out on their own. * * See also the #ifdef in fbmem.c. */ fb_register_client(&am200_fb_notif); pxa2xx_mfp_config(ARRAY_AND_SIZE(am200_pin_config)); /* 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_DESCRIPTION("board driver for am200 metronome epd kit"); MODULE_AUTHOR("Jaya Kumar"); MODULE_LICENSE("GPL");
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with Cregit http://github.com/cregit/cregit
Version 2.0-RC1