diff options
Diffstat (limited to 'drivers/video/broadsheetfb.c')
| -rw-r--r-- | drivers/video/broadsheetfb.c | 568 |
1 files changed, 0 insertions, 568 deletions
diff --git a/drivers/video/broadsheetfb.c b/drivers/video/broadsheetfb.c deleted file mode 100644 index df9ccb901d8..00000000000 --- a/drivers/video/broadsheetfb.c +++ /dev/null @@ -1,568 +0,0 @@ -/* - * broadsheetfb.c -- FB driver for E-Ink Broadsheet controller - * - * 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 driver is written to be used with the Broadsheet display controller. - * - * It is intended to be architecture independent. A board specific driver - * must be used to perform all the physical IO interactions. - * - */ - -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/errno.h> -#include <linux/string.h> -#include <linux/mm.h> -#include <linux/slab.h> -#include <linux/vmalloc.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 <video/broadsheetfb.h> - -/* Display specific information */ -#define DPY_W 800 -#define DPY_H 600 - -static struct fb_fix_screeninfo broadsheetfb_fix __devinitdata = { - .id = "broadsheetfb", - .type = FB_TYPE_PACKED_PIXELS, - .visual = FB_VISUAL_STATIC_PSEUDOCOLOR, - .xpanstep = 0, - .ypanstep = 0, - .ywrapstep = 0, - .line_length = DPY_W, - .accel = FB_ACCEL_NONE, -}; - -static struct fb_var_screeninfo broadsheetfb_var __devinitdata = { - .xres = DPY_W, - .yres = DPY_H, - .xres_virtual = DPY_W, - .yres_virtual = DPY_H, - .bits_per_pixel = 8, - .grayscale = 1, - .red = { 0, 4, 0 }, - .green = { 0, 4, 0 }, - .blue = { 0, 4, 0 }, - .transp = { 0, 0, 0 }, -}; - -/* main broadsheetfb functions */ -static void broadsheet_issue_data(struct broadsheetfb_par *par, u16 data) -{ - par->board->set_ctl(par, BS_WR, 0); - par->board->set_hdb(par, data); - par->board->set_ctl(par, BS_WR, 1); -} - -static void broadsheet_issue_cmd(struct broadsheetfb_par *par, u16 data) -{ - par->board->set_ctl(par, BS_DC, 0); - broadsheet_issue_data(par, data); -} - -static void broadsheet_send_command(struct broadsheetfb_par *par, u16 data) -{ - par->board->wait_for_rdy(par); - - par->board->set_ctl(par, BS_CS, 0); - broadsheet_issue_cmd(par, data); - par->board->set_ctl(par, BS_DC, 1); - par->board->set_ctl(par, BS_CS, 1); -} - -static void broadsheet_send_cmdargs(struct broadsheetfb_par *par, u16 cmd, - int argc, u16 *argv) -{ - int i; - - par->board->wait_for_rdy(par); - - par->board->set_ctl(par, BS_CS, 0); - broadsheet_issue_cmd(par, cmd); - par->board->set_ctl(par, BS_DC, 1); - - for (i = 0; i < argc; i++) - broadsheet_issue_data(par, argv[i]); - par->board->set_ctl(par, BS_CS, 1); -} - -static void broadsheet_burst_write(struct broadsheetfb_par *par, int size, - u16 *data) -{ - int i; - u16 tmp; - - par->board->set_ctl(par, BS_CS, 0); - par->board->set_ctl(par, BS_DC, 1); - - for (i = 0; i < size; i++) { - par->board->set_ctl(par, BS_WR, 0); - tmp = (data[i] & 0x0F) << 4; - tmp |= (data[i] & 0x0F00) << 4; - par->board->set_hdb(par, tmp); - par->board->set_ctl(par, BS_WR, 1); - } - - par->board->set_ctl(par, BS_CS, 1); -} - -static u16 broadsheet_get_data(struct broadsheetfb_par *par) -{ - u16 res; - /* wait for ready to go hi. (lo is busy) */ - par->board->wait_for_rdy(par); - - /* cs lo, dc lo for cmd, we lo for each data, db as usual */ - par->board->set_ctl(par, BS_DC, 1); - par->board->set_ctl(par, BS_CS, 0); - par->board->set_ctl(par, BS_WR, 0); - - res = par->board->get_hdb(par); - - /* strobe wr */ - par->board->set_ctl(par, BS_WR, 1); - par->board->set_ctl(par, BS_CS, 1); - - return res; -} - -static void broadsheet_write_reg(struct broadsheetfb_par *par, u16 reg, - u16 data) -{ - /* wait for ready to go hi. (lo is busy) */ - par->board->wait_for_rdy(par); - - /* cs lo, dc lo for cmd, we lo for each data, db as usual */ - par->board->set_ctl(par, BS_CS, 0); - - broadsheet_issue_cmd(par, BS_CMD_WR_REG); - - par->board->set_ctl(par, BS_DC, 1); - - broadsheet_issue_data(par, reg); - broadsheet_issue_data(par, data); - - par->board->set_ctl(par, BS_CS, 1); -} - -static u16 broadsheet_read_reg(struct broadsheetfb_par *par, u16 reg) -{ - broadsheet_send_command(par, reg); - msleep(100); - return broadsheet_get_data(par); -} - -static void __devinit broadsheet_init_display(struct broadsheetfb_par *par) -{ - u16 args[5]; - - args[0] = DPY_W; - args[1] = DPY_H; - args[2] = (100 | (1 << 8) | (1 << 9)); /* sdcfg */ - args[3] = 2; /* gdrv cfg */ - args[4] = (4 | (1 << 7)); /* lut index format */ - broadsheet_send_cmdargs(par, BS_CMD_INIT_DSPE_CFG, 5, args); - - /* did the controller really set it? */ - broadsheet_send_cmdargs(par, BS_CMD_INIT_DSPE_CFG, 5, args); - - args[0] = 4; /* fsync len */ - args[1] = (10 << 8) | 4; /* fend/fbegin len */ - args[2] = 10; /* line sync len */ - args[3] = (100 << 8) | 4; /* line end/begin len */ - args[4] = 6; /* pixel clock cfg */ - broadsheet_send_cmdargs(par, BS_CMD_INIT_DSPE_TMG, 5, args); - - /* setup waveform */ - args[0] = 0x886; - args[1] = 0; - broadsheet_send_cmdargs(par, BS_CMD_RD_WFM_INFO, 2, args); - - broadsheet_send_command(par, BS_CMD_UPD_GDRV_CLR); - - broadsheet_send_command(par, BS_CMD_WAIT_DSPE_TRG); - - broadsheet_write_reg(par, 0x330, 0x84); - - broadsheet_send_command(par, BS_CMD_WAIT_DSPE_TRG); - - args[0] = (0x3 << 4); - broadsheet_send_cmdargs(par, BS_CMD_LD_IMG, 1, args); - - args[0] = 0x154; - broadsheet_send_cmdargs(par, BS_CMD_WR_REG, 1, args); - - broadsheet_burst_write(par, DPY_W*DPY_H/2, - (u16 *) par->info->screen_base); - - broadsheet_send_command(par, BS_CMD_LD_IMG_END); - - args[0] = 0x4300; - broadsheet_send_cmdargs(par, BS_CMD_UPD_FULL, 1, args); - - broadsheet_send_command(par, BS_CMD_WAIT_DSPE_TRG); - - broadsheet_send_command(par, BS_CMD_WAIT_DSPE_FREND); - - par->board->wait_for_rdy(par); -} - -static void __devinit broadsheet_init(struct broadsheetfb_par *par) -{ - broadsheet_send_command(par, BS_CMD_INIT_SYS_RUN); - /* the controller needs a second */ - msleep(1000); - broadsheet_init_display(par); -} - -static void broadsheetfb_dpy_update_pages(struct broadsheetfb_par *par, - u16 y1, u16 y2) -{ - u16 args[5]; - unsigned char *buf = (unsigned char *)par->info->screen_base; - - /* y1 must be a multiple of 4 so drop the lower bits */ - y1 &= 0xFFFC; - /* y2 must be a multiple of 4 , but - 1 so up the lower bits */ - y2 |= 0x0003; - - args[0] = 0x3 << 4; - args[1] = 0; - args[2] = y1; - args[3] = cpu_to_le16(par->info->var.xres); - args[4] = y2; - broadsheet_send_cmdargs(par, BS_CMD_LD_IMG_AREA, 5, args); - - args[0] = 0x154; - broadsheet_send_cmdargs(par, BS_CMD_WR_REG, 1, args); - - buf += y1 * par->info->var.xres; - broadsheet_burst_write(par, ((1 + y2 - y1) * par->info->var.xres)/2, - (u16 *) buf); - - broadsheet_send_command(par, BS_CMD_LD_IMG_END); - - args[0] = 0x4300; - broadsheet_send_cmdargs(par, BS_CMD_UPD_FULL, 1, args); - - broadsheet_send_command(par, BS_CMD_WAIT_DSPE_TRG); - - broadsheet_send_command(par, BS_CMD_WAIT_DSPE_FREND); - - par->board->wait_for_rdy(par); - -} - -static void broadsheetfb_dpy_update(struct broadsheetfb_par *par) -{ - u16 args[5]; - - args[0] = 0x3 << 4; - broadsheet_send_cmdargs(par, BS_CMD_LD_IMG, 1, args); - - args[0] = 0x154; - broadsheet_send_cmdargs(par, BS_CMD_WR_REG, 1, args); - broadsheet_burst_write(par, DPY_W*DPY_H/2, - (u16 *) par->info->screen_base); - - broadsheet_send_command(par, BS_CMD_LD_IMG_END); - - args[0] = 0x4300; - broadsheet_send_cmdargs(par, BS_CMD_UPD_FULL, 1, args); - - broadsheet_send_command(par, BS_CMD_WAIT_DSPE_TRG); - - broadsheet_send_command(par, BS_CMD_WAIT_DSPE_FREND); - - par->board->wait_for_rdy(par); - -} - -/* this is called back from the deferred io workqueue */ -static void broadsheetfb_dpy_deferred_io(struct fb_info *info, - struct list_head *pagelist) -{ - u16 y1 = 0, h = 0; - int prev_index = -1; - struct page *cur; - struct fb_deferred_io *fbdefio = info->fbdefio; - int h_inc; - u16 yres = info->var.yres; - u16 xres = info->var.xres; - - /* height increment is fixed per page */ - h_inc = DIV_ROUND_UP(PAGE_SIZE , xres); - - /* walk the written page list and swizzle the data */ - list_for_each_entry(cur, &fbdefio->pagelist, lru) { - if (prev_index < 0) { - /* just starting so assign first page */ - y1 = (cur->index << PAGE_SHIFT) / xres; - h = h_inc; - } else if ((prev_index + 1) == cur->index) { - /* this page is consecutive so increase our height */ - h += h_inc; - } else { - /* page not consecutive, issue previous update first */ - broadsheetfb_dpy_update_pages(info->par, y1, y1 + h); - /* start over with our non consecutive page */ - y1 = (cur->index << PAGE_SHIFT) / xres; - h = h_inc; - } - prev_index = cur->index; - } - - /* if we still have any pages to update we do so now */ - if (h >= yres) { - /* its a full screen update, just do it */ - broadsheetfb_dpy_update(info->par); - } else { - broadsheetfb_dpy_update_pages(info->par, y1, - min((u16) (y1 + h), yres)); - } -} - -static void broadsheetfb_fillrect(struct fb_info *info, - const struct fb_fillrect *rect) -{ - struct broadsheetfb_par *par = info->par; - - sys_fillrect(info, rect); - - broadsheetfb_dpy_update(par); -} - -static void broadsheetfb_copyarea(struct fb_info *info, - const struct fb_copyarea *area) -{ - struct broadsheetfb_par *par = info->par; - - sys_copyarea(info, area); - - broadsheetfb_dpy_update(par); -} - -static void broadsheetfb_imageblit(struct fb_info *info, - const struct fb_image *image) -{ - struct broadsheetfb_par *par = info->par; - - sys_imageblit(info, image); - - broadsheetfb_dpy_update(par); -} - -/* - * this is the slow path from userspace. they can seek and write to - * the fb. it's inefficient to do anything less than a full screen draw - */ -static ssize_t broadsheetfb_write(struct fb_info *info, const char __user *buf, - size_t count, loff_t *ppos) -{ - struct broadsheetfb_par *par = info->par; - unsigned long p = *ppos; - void *dst; - int err = 0; - unsigned long total_size; - - if (info->state != FBINFO_STATE_RUNNING) - return -EPERM; - - total_size = info->fix.smem_len; - - if (p > total_size) - return -EFBIG; - - if (count > total_size) { - err = -EFBIG; - count = total_size; - } - - if (count + p > total_size) { - if (!err) - err = -ENOSPC; - - count = total_size - p; - } - - dst = (void *)(info->screen_base + p); - - if (copy_from_user(dst, buf, count)) - err = -EFAULT; - - if (!err) - *ppos += count; - - broadsheetfb_dpy_update(par); - - return (err) ? err : count; -} - -static struct fb_ops broadsheetfb_ops = { - .owner = THIS_MODULE, - .fb_read = fb_sys_read, - .fb_write = broadsheetfb_write, - .fb_fillrect = broadsheetfb_fillrect, - .fb_copyarea = broadsheetfb_copyarea, - .fb_imageblit = broadsheetfb_imageblit, -}; - -static struct fb_deferred_io broadsheetfb_defio = { - .delay = HZ/4, - .deferred_io = broadsheetfb_dpy_deferred_io, -}; - -static int __devinit broadsheetfb_probe(struct platform_device *dev) -{ - struct fb_info *info; - struct broadsheet_board *board; - int retval = -ENOMEM; - int videomemorysize; - unsigned char *videomemory; - struct broadsheetfb_par *par; - 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; - - info = framebuffer_alloc(sizeof(struct broadsheetfb_par), &dev->dev); - if (!info) - goto err; - - videomemorysize = (DPY_W*DPY_H); - videomemory = vmalloc(videomemorysize); - if (!videomemory) - goto err_fb_rel; - - memset(videomemory, 0, videomemorysize); - - info->screen_base = (char *)videomemory; - info->fbops = &broadsheetfb_ops; - - info->var = broadsheetfb_var; - info->fix = broadsheetfb_fix; - info->fix.smem_len = videomemorysize; - par = info->par; - par->info = info; - par->board = board; - par->write_reg = broadsheet_write_reg; - par->read_reg = broadsheet_read_reg; - init_waitqueue_head(&par->waitq); - - info->flags = FBINFO_FLAG_DEFAULT | FBINFO_VIRTFB; - - info->fbdefio = &broadsheetfb_defio; - fb_deferred_io_init(info); - - retval = fb_alloc_cmap(&info->cmap, 16, 0); - if (retval < 0) { - dev_err(&dev->dev, "Failed to allocate colormap\n"); - goto err_vfree; - } - - /* set cmap */ - for (i = 0; i < 16; i++) - info->cmap.red[i] = (((2*i)+1)*(0xFFFF))/32; - memcpy(info->cmap.green, info->cmap.red, sizeof(u16)*16); - memcpy(info->cmap.blue, info->cmap.red, sizeof(u16)*16); - - retval = par->board->setup_irq(info); - if (retval < 0) - goto err_cmap; - - /* this inits the dpy */ - retval = board->init(par); - if (retval < 0) - goto err_free_irq; - - broadsheet_init(par); - - retval = register_framebuffer(info); - if (retval < 0) - goto err_free_irq; - platform_set_drvdata(dev, info); - - printk(KERN_INFO - "fb%d: Broadsheet frame buffer, using %dK of video memory\n", - info->node, videomemorysize >> 10); - - - return 0; - -err_free_irq: - board->cleanup(par); -err_cmap: - fb_dealloc_cmap(&info->cmap); -err_vfree: - vfree(videomemory); -err_fb_rel: - framebuffer_release(info); -err: - module_put(board->owner); - return retval; - -} - -static int __devexit broadsheetfb_remove(struct platform_device *dev) -{ - struct fb_info *info = platform_get_drvdata(dev); - - if (info) { - struct broadsheetfb_par *par = info->par; - unregister_framebuffer(info); - fb_deferred_io_cleanup(info); - par->board->cleanup(par); - fb_dealloc_cmap(&info->cmap); - vfree((void *)info->screen_base); - module_put(par->board->owner); - framebuffer_release(info); - } - return 0; -} - -static struct platform_driver broadsheetfb_driver = { - .probe = broadsheetfb_probe, - .remove = broadsheetfb_remove, - .driver = { - .owner = THIS_MODULE, - .name = "broadsheetfb", - }, -}; - -static int __init broadsheetfb_init(void) -{ - return platform_driver_register(&broadsheetfb_driver); -} - -static void __exit broadsheetfb_exit(void) -{ - platform_driver_unregister(&broadsheetfb_driver); -} - -module_init(broadsheetfb_init); -module_exit(broadsheetfb_exit); - -MODULE_DESCRIPTION("fbdev driver for Broadsheet controller"); -MODULE_AUTHOR("Jaya Kumar"); -MODULE_LICENSE("GPL"); |