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![Joe Perches](/assets/img/avatar_default.png)
Neaten and shorten the code using the new fb_<level> macros. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
1223 lines
28 KiB
C
1223 lines
28 KiB
C
/*
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* broadsheetfb.c -- FB driver for E-Ink Broadsheet controller
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*
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* Copyright (C) 2008, Jaya Kumar
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file COPYING in the main directory of this archive for
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* more details.
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*
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* Layout is based on skeletonfb.c by James Simmons and Geert Uytterhoeven.
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*
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* This driver is written to be used with the Broadsheet display controller.
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*
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* It is intended to be architecture independent. A board specific driver
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* must be used to perform all the physical IO interactions.
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*
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/string.h>
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#include <linux/mm.h>
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#include <linux/slab.h>
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#include <linux/vmalloc.h>
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#include <linux/delay.h>
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#include <linux/interrupt.h>
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#include <linux/fb.h>
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#include <linux/init.h>
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#include <linux/platform_device.h>
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#include <linux/list.h>
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#include <linux/firmware.h>
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#include <linux/uaccess.h>
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#include <video/broadsheetfb.h>
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/* track panel specific parameters */
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struct panel_info {
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int w;
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int h;
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u16 sdcfg;
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u16 gdcfg;
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u16 lutfmt;
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u16 fsynclen;
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u16 fendfbegin;
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u16 lsynclen;
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u16 lendlbegin;
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u16 pixclk;
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};
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/* table of panel specific parameters to be indexed into by the board drivers */
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static struct panel_info panel_table[] = {
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{ /* standard 6" on TFT backplane */
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.w = 800,
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.h = 600,
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.sdcfg = (100 | (1 << 8) | (1 << 9)),
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.gdcfg = 2,
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.lutfmt = (4 | (1 << 7)),
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.fsynclen = 4,
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.fendfbegin = (10 << 8) | 4,
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.lsynclen = 10,
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.lendlbegin = (100 << 8) | 4,
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.pixclk = 6,
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},
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{ /* custom 3.7" flexible on PET or steel */
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.w = 320,
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.h = 240,
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.sdcfg = (67 | (0 << 8) | (0 << 9) | (0 << 10) | (0 << 12)),
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.gdcfg = 3,
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.lutfmt = (4 | (1 << 7)),
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.fsynclen = 0,
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.fendfbegin = (80 << 8) | 4,
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.lsynclen = 10,
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.lendlbegin = (80 << 8) | 20,
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.pixclk = 14,
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},
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{ /* standard 9.7" on TFT backplane */
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.w = 1200,
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.h = 825,
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.sdcfg = (100 | (1 << 8) | (1 << 9) | (0 << 10) | (0 << 12)),
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.gdcfg = 2,
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.lutfmt = (4 | (1 << 7)),
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.fsynclen = 0,
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.fendfbegin = (4 << 8) | 4,
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.lsynclen = 4,
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.lendlbegin = (60 << 8) | 10,
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.pixclk = 3,
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},
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};
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#define DPY_W 800
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#define DPY_H 600
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static struct fb_fix_screeninfo broadsheetfb_fix = {
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.id = "broadsheetfb",
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.type = FB_TYPE_PACKED_PIXELS,
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.visual = FB_VISUAL_STATIC_PSEUDOCOLOR,
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.xpanstep = 0,
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.ypanstep = 0,
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.ywrapstep = 0,
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.line_length = DPY_W,
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.accel = FB_ACCEL_NONE,
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};
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static struct fb_var_screeninfo broadsheetfb_var = {
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.xres = DPY_W,
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.yres = DPY_H,
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.xres_virtual = DPY_W,
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.yres_virtual = DPY_H,
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.bits_per_pixel = 8,
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.grayscale = 1,
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.red = { 0, 4, 0 },
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.green = { 0, 4, 0 },
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.blue = { 0, 4, 0 },
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.transp = { 0, 0, 0 },
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};
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/* main broadsheetfb functions */
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static void broadsheet_gpio_issue_data(struct broadsheetfb_par *par, u16 data)
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{
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par->board->set_ctl(par, BS_WR, 0);
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par->board->set_hdb(par, data);
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par->board->set_ctl(par, BS_WR, 1);
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}
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static void broadsheet_gpio_issue_cmd(struct broadsheetfb_par *par, u16 data)
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{
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par->board->set_ctl(par, BS_DC, 0);
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broadsheet_gpio_issue_data(par, data);
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}
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static void broadsheet_gpio_send_command(struct broadsheetfb_par *par, u16 data)
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{
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par->board->wait_for_rdy(par);
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par->board->set_ctl(par, BS_CS, 0);
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broadsheet_gpio_issue_cmd(par, data);
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par->board->set_ctl(par, BS_DC, 1);
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par->board->set_ctl(par, BS_CS, 1);
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}
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static void broadsheet_gpio_send_cmdargs(struct broadsheetfb_par *par, u16 cmd,
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int argc, u16 *argv)
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{
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int i;
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par->board->wait_for_rdy(par);
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par->board->set_ctl(par, BS_CS, 0);
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broadsheet_gpio_issue_cmd(par, cmd);
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par->board->set_ctl(par, BS_DC, 1);
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for (i = 0; i < argc; i++)
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broadsheet_gpio_issue_data(par, argv[i]);
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par->board->set_ctl(par, BS_CS, 1);
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}
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static void broadsheet_mmio_send_cmdargs(struct broadsheetfb_par *par, u16 cmd,
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int argc, u16 *argv)
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{
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int i;
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par->board->mmio_write(par, BS_MMIO_CMD, cmd);
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for (i = 0; i < argc; i++)
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par->board->mmio_write(par, BS_MMIO_DATA, argv[i]);
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}
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static void broadsheet_send_command(struct broadsheetfb_par *par, u16 data)
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{
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if (par->board->mmio_write)
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par->board->mmio_write(par, BS_MMIO_CMD, data);
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else
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broadsheet_gpio_send_command(par, data);
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}
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static void broadsheet_send_cmdargs(struct broadsheetfb_par *par, u16 cmd,
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int argc, u16 *argv)
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{
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if (par->board->mmio_write)
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broadsheet_mmio_send_cmdargs(par, cmd, argc, argv);
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else
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broadsheet_gpio_send_cmdargs(par, cmd, argc, argv);
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}
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static void broadsheet_gpio_burst_write(struct broadsheetfb_par *par, int size,
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u16 *data)
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{
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int i;
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u16 tmp;
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par->board->set_ctl(par, BS_CS, 0);
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par->board->set_ctl(par, BS_DC, 1);
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for (i = 0; i < size; i++) {
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par->board->set_ctl(par, BS_WR, 0);
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tmp = (data[i] & 0x0F) << 4;
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tmp |= (data[i] & 0x0F00) << 4;
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par->board->set_hdb(par, tmp);
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par->board->set_ctl(par, BS_WR, 1);
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}
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par->board->set_ctl(par, BS_CS, 1);
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}
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static void broadsheet_mmio_burst_write(struct broadsheetfb_par *par, int size,
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u16 *data)
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{
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int i;
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u16 tmp;
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for (i = 0; i < size; i++) {
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tmp = (data[i] & 0x0F) << 4;
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tmp |= (data[i] & 0x0F00) << 4;
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par->board->mmio_write(par, BS_MMIO_DATA, tmp);
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}
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}
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static void broadsheet_burst_write(struct broadsheetfb_par *par, int size,
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u16 *data)
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{
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if (par->board->mmio_write)
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broadsheet_mmio_burst_write(par, size, data);
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else
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broadsheet_gpio_burst_write(par, size, data);
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}
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static u16 broadsheet_gpio_get_data(struct broadsheetfb_par *par)
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{
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u16 res;
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/* wait for ready to go hi. (lo is busy) */
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par->board->wait_for_rdy(par);
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/* cs lo, dc lo for cmd, we lo for each data, db as usual */
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par->board->set_ctl(par, BS_DC, 1);
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par->board->set_ctl(par, BS_CS, 0);
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par->board->set_ctl(par, BS_WR, 0);
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res = par->board->get_hdb(par);
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/* strobe wr */
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par->board->set_ctl(par, BS_WR, 1);
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par->board->set_ctl(par, BS_CS, 1);
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return res;
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}
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static u16 broadsheet_get_data(struct broadsheetfb_par *par)
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{
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if (par->board->mmio_read)
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return par->board->mmio_read(par);
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else
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return broadsheet_gpio_get_data(par);
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}
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static void broadsheet_gpio_write_reg(struct broadsheetfb_par *par, u16 reg,
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u16 data)
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{
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/* wait for ready to go hi. (lo is busy) */
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par->board->wait_for_rdy(par);
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/* cs lo, dc lo for cmd, we lo for each data, db as usual */
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par->board->set_ctl(par, BS_CS, 0);
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broadsheet_gpio_issue_cmd(par, BS_CMD_WR_REG);
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par->board->set_ctl(par, BS_DC, 1);
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broadsheet_gpio_issue_data(par, reg);
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broadsheet_gpio_issue_data(par, data);
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par->board->set_ctl(par, BS_CS, 1);
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}
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static void broadsheet_mmio_write_reg(struct broadsheetfb_par *par, u16 reg,
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u16 data)
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{
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par->board->mmio_write(par, BS_MMIO_CMD, BS_CMD_WR_REG);
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par->board->mmio_write(par, BS_MMIO_DATA, reg);
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par->board->mmio_write(par, BS_MMIO_DATA, data);
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}
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static void broadsheet_write_reg(struct broadsheetfb_par *par, u16 reg,
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u16 data)
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{
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if (par->board->mmio_write)
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broadsheet_mmio_write_reg(par, reg, data);
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else
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broadsheet_gpio_write_reg(par, reg, data);
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}
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static void broadsheet_write_reg32(struct broadsheetfb_par *par, u16 reg,
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u32 data)
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{
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broadsheet_write_reg(par, reg, cpu_to_le32(data) & 0xFFFF);
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broadsheet_write_reg(par, reg + 2, (cpu_to_le32(data) >> 16) & 0xFFFF);
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}
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static u16 broadsheet_read_reg(struct broadsheetfb_par *par, u16 reg)
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{
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broadsheet_send_cmdargs(par, BS_CMD_RD_REG, 1, ®);
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par->board->wait_for_rdy(par);
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return broadsheet_get_data(par);
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}
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/* functions for waveform manipulation */
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static int is_broadsheet_pll_locked(struct broadsheetfb_par *par)
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{
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return broadsheet_read_reg(par, 0x000A) & 0x0001;
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}
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static int broadsheet_setup_plls(struct broadsheetfb_par *par)
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{
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int retry_count = 0;
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u16 tmp;
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/* disable arral saemipu mode */
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broadsheet_write_reg(par, 0x0006, 0x0000);
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broadsheet_write_reg(par, 0x0010, 0x0004);
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broadsheet_write_reg(par, 0x0012, 0x5949);
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broadsheet_write_reg(par, 0x0014, 0x0040);
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broadsheet_write_reg(par, 0x0016, 0x0000);
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do {
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if (retry_count++ > 100)
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return -ETIMEDOUT;
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mdelay(1);
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} while (!is_broadsheet_pll_locked(par));
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tmp = broadsheet_read_reg(par, 0x0006);
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tmp &= ~0x1;
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broadsheet_write_reg(par, 0x0006, tmp);
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return 0;
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}
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static int broadsheet_setup_spi(struct broadsheetfb_par *par)
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{
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broadsheet_write_reg(par, 0x0204, ((3 << 3) | 1));
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broadsheet_write_reg(par, 0x0208, 0x0001);
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return 0;
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}
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static int broadsheet_setup_spiflash(struct broadsheetfb_par *par,
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u16 *orig_sfmcd)
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{
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*orig_sfmcd = broadsheet_read_reg(par, 0x0204);
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broadsheet_write_reg(par, 0x0208, 0);
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broadsheet_write_reg(par, 0x0204, 0);
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broadsheet_write_reg(par, 0x0204, ((3 << 3) | 1));
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return 0;
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}
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static int broadsheet_spiflash_wait_for_bit(struct broadsheetfb_par *par,
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u16 reg, int bitnum, int val,
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int timeout)
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{
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u16 tmp;
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do {
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tmp = broadsheet_read_reg(par, reg);
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if (((tmp >> bitnum) & 1) == val)
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return 0;
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mdelay(1);
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} while (timeout--);
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return -ETIMEDOUT;
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}
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static int broadsheet_spiflash_write_byte(struct broadsheetfb_par *par, u8 data)
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{
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broadsheet_write_reg(par, 0x0202, (data | 0x100));
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return broadsheet_spiflash_wait_for_bit(par, 0x0206, 3, 0, 100);
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}
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static int broadsheet_spiflash_read_byte(struct broadsheetfb_par *par, u8 *data)
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{
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int err;
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u16 tmp;
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broadsheet_write_reg(par, 0x0202, 0);
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err = broadsheet_spiflash_wait_for_bit(par, 0x0206, 3, 0, 100);
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if (err)
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return err;
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tmp = broadsheet_read_reg(par, 0x200);
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*data = tmp & 0xFF;
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return 0;
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}
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static int broadsheet_spiflash_wait_for_status(struct broadsheetfb_par *par,
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int timeout)
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{
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u8 tmp;
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int err;
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do {
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broadsheet_write_reg(par, 0x0208, 1);
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err = broadsheet_spiflash_write_byte(par, 0x05);
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if (err)
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goto failout;
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err = broadsheet_spiflash_read_byte(par, &tmp);
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if (err)
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goto failout;
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broadsheet_write_reg(par, 0x0208, 0);
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if (!(tmp & 0x1))
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return 0;
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mdelay(5);
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} while (timeout--);
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dev_err(par->info->device, "Timed out waiting for spiflash status\n");
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return -ETIMEDOUT;
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failout:
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broadsheet_write_reg(par, 0x0208, 0);
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return err;
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}
|
|
|
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static int broadsheet_spiflash_op_on_address(struct broadsheetfb_par *par,
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u8 op, u32 addr)
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{
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int i;
|
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u8 tmp;
|
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int err;
|
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broadsheet_write_reg(par, 0x0208, 1);
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err = broadsheet_spiflash_write_byte(par, op);
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if (err)
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return err;
|
|
|
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for (i = 2; i >= 0; i--) {
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tmp = ((addr >> (i * 8)) & 0xFF);
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err = broadsheet_spiflash_write_byte(par, tmp);
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if (err)
|
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return err;
|
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}
|
|
|
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return err;
|
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}
|
|
|
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static int broadsheet_verify_spiflash(struct broadsheetfb_par *par,
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int *flash_type)
|
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{
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int err = 0;
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u8 sig;
|
|
|
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err = broadsheet_spiflash_op_on_address(par, 0xAB, 0x00000000);
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if (err)
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goto failout;
|
|
|
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err = broadsheet_spiflash_read_byte(par, &sig);
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if (err)
|
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goto failout;
|
|
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if ((sig != 0x10) && (sig != 0x11)) {
|
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dev_err(par->info->device, "Unexpected flash type\n");
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err = -EINVAL;
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goto failout;
|
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}
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*flash_type = sig;
|
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failout:
|
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broadsheet_write_reg(par, 0x0208, 0);
|
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return err;
|
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}
|
|
|
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static int broadsheet_setup_for_wfm_write(struct broadsheetfb_par *par,
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u16 *initial_sfmcd, int *flash_type)
|
|
|
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{
|
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int err;
|
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|
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err = broadsheet_setup_plls(par);
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if (err)
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return err;
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|
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broadsheet_write_reg(par, 0x0106, 0x0203);
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|
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err = broadsheet_setup_spi(par);
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if (err)
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return err;
|
|
|
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err = broadsheet_setup_spiflash(par, initial_sfmcd);
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if (err)
|
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return err;
|
|
|
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return broadsheet_verify_spiflash(par, flash_type);
|
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}
|
|
|
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static int broadsheet_spiflash_write_control(struct broadsheetfb_par *par,
|
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int mode)
|
|
{
|
|
int err;
|
|
|
|
broadsheet_write_reg(par, 0x0208, 1);
|
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if (mode)
|
|
err = broadsheet_spiflash_write_byte(par, 0x06);
|
|
else
|
|
err = broadsheet_spiflash_write_byte(par, 0x04);
|
|
|
|
broadsheet_write_reg(par, 0x0208, 0);
|
|
return err;
|
|
}
|
|
|
|
static int broadsheet_spiflash_erase_sector(struct broadsheetfb_par *par,
|
|
int addr)
|
|
{
|
|
int err;
|
|
|
|
broadsheet_spiflash_write_control(par, 1);
|
|
|
|
err = broadsheet_spiflash_op_on_address(par, 0xD8, addr);
|
|
|
|
broadsheet_write_reg(par, 0x0208, 0);
|
|
|
|
if (err)
|
|
return err;
|
|
|
|
err = broadsheet_spiflash_wait_for_status(par, 1000);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int broadsheet_spiflash_read_range(struct broadsheetfb_par *par,
|
|
int addr, int size, char *data)
|
|
{
|
|
int err;
|
|
int i;
|
|
|
|
err = broadsheet_spiflash_op_on_address(par, 0x03, addr);
|
|
if (err)
|
|
goto failout;
|
|
|
|
for (i = 0; i < size; i++) {
|
|
err = broadsheet_spiflash_read_byte(par, &data[i]);
|
|
if (err)
|
|
goto failout;
|
|
}
|
|
|
|
failout:
|
|
broadsheet_write_reg(par, 0x0208, 0);
|
|
return err;
|
|
}
|
|
|
|
#define BS_SPIFLASH_PAGE_SIZE 256
|
|
static int broadsheet_spiflash_write_page(struct broadsheetfb_par *par,
|
|
int addr, const char *data)
|
|
{
|
|
int err;
|
|
int i;
|
|
|
|
broadsheet_spiflash_write_control(par, 1);
|
|
|
|
err = broadsheet_spiflash_op_on_address(par, 0x02, addr);
|
|
if (err)
|
|
goto failout;
|
|
|
|
for (i = 0; i < BS_SPIFLASH_PAGE_SIZE; i++) {
|
|
err = broadsheet_spiflash_write_byte(par, data[i]);
|
|
if (err)
|
|
goto failout;
|
|
}
|
|
|
|
broadsheet_write_reg(par, 0x0208, 0);
|
|
|
|
err = broadsheet_spiflash_wait_for_status(par, 100);
|
|
|
|
failout:
|
|
return err;
|
|
}
|
|
|
|
static int broadsheet_spiflash_write_sector(struct broadsheetfb_par *par,
|
|
int addr, const char *data, int sector_size)
|
|
{
|
|
int i;
|
|
int err;
|
|
|
|
for (i = 0; i < sector_size; i += BS_SPIFLASH_PAGE_SIZE) {
|
|
err = broadsheet_spiflash_write_page(par, addr + i, &data[i]);
|
|
if (err)
|
|
return err;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* The caller must guarantee that the data to be rewritten is entirely
|
|
* contained within this sector. That is, data_start_addr + data_len
|
|
* must be less than sector_start_addr + sector_size.
|
|
*/
|
|
static int broadsheet_spiflash_rewrite_sector(struct broadsheetfb_par *par,
|
|
int sector_size, int data_start_addr,
|
|
int data_len, const char *data)
|
|
{
|
|
int err;
|
|
char *sector_buffer;
|
|
int tail_start_addr;
|
|
int start_sector_addr;
|
|
|
|
sector_buffer = kzalloc(sizeof(char)*sector_size, GFP_KERNEL);
|
|
if (!sector_buffer)
|
|
return -ENOMEM;
|
|
|
|
/* the start address of the sector is the 0th byte of that sector */
|
|
start_sector_addr = (data_start_addr / sector_size) * sector_size;
|
|
|
|
/*
|
|
* check if there is head data that we need to readback into our sector
|
|
* buffer first
|
|
*/
|
|
if (data_start_addr != start_sector_addr) {
|
|
/*
|
|
* we need to read every byte up till the start address of our
|
|
* data and we put it into our sector buffer.
|
|
*/
|
|
err = broadsheet_spiflash_read_range(par, start_sector_addr,
|
|
data_start_addr, sector_buffer);
|
|
if (err)
|
|
return err;
|
|
}
|
|
|
|
/* now we copy our data into the right place in the sector buffer */
|
|
memcpy(sector_buffer + data_start_addr, data, data_len);
|
|
|
|
/*
|
|
* now we check if there is a tail section of the sector that we need to
|
|
* readback.
|
|
*/
|
|
tail_start_addr = (data_start_addr + data_len) % sector_size;
|
|
|
|
if (tail_start_addr) {
|
|
int tail_len;
|
|
|
|
tail_len = sector_size - tail_start_addr;
|
|
|
|
/* now we read this tail into our sector buffer */
|
|
err = broadsheet_spiflash_read_range(par, tail_start_addr,
|
|
tail_len, sector_buffer + tail_start_addr);
|
|
if (err)
|
|
return err;
|
|
}
|
|
|
|
/* if we got here we have the full sector that we want to rewrite. */
|
|
|
|
/* first erase the sector */
|
|
err = broadsheet_spiflash_erase_sector(par, start_sector_addr);
|
|
if (err)
|
|
return err;
|
|
|
|
/* now write it */
|
|
err = broadsheet_spiflash_write_sector(par, start_sector_addr,
|
|
sector_buffer, sector_size);
|
|
return err;
|
|
}
|
|
|
|
static int broadsheet_write_spiflash(struct broadsheetfb_par *par, u32 wfm_addr,
|
|
const u8 *wfm, int bytecount, int flash_type)
|
|
{
|
|
int sector_size;
|
|
int err;
|
|
int cur_addr;
|
|
int writecount;
|
|
int maxlen;
|
|
int offset = 0;
|
|
|
|
switch (flash_type) {
|
|
case 0x10:
|
|
sector_size = 32*1024;
|
|
break;
|
|
case 0x11:
|
|
default:
|
|
sector_size = 64*1024;
|
|
break;
|
|
}
|
|
|
|
while (bytecount) {
|
|
cur_addr = wfm_addr + offset;
|
|
maxlen = roundup(cur_addr, sector_size) - cur_addr;
|
|
writecount = min(bytecount, maxlen);
|
|
|
|
err = broadsheet_spiflash_rewrite_sector(par, sector_size,
|
|
cur_addr, writecount, wfm + offset);
|
|
if (err)
|
|
return err;
|
|
|
|
offset += writecount;
|
|
bytecount -= writecount;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int broadsheet_store_waveform_to_spiflash(struct broadsheetfb_par *par,
|
|
const u8 *wfm, size_t wfm_size)
|
|
{
|
|
int err = 0;
|
|
u16 initial_sfmcd = 0;
|
|
int flash_type = 0;
|
|
|
|
err = broadsheet_setup_for_wfm_write(par, &initial_sfmcd, &flash_type);
|
|
if (err)
|
|
goto failout;
|
|
|
|
err = broadsheet_write_spiflash(par, 0x886, wfm, wfm_size, flash_type);
|
|
|
|
failout:
|
|
broadsheet_write_reg(par, 0x0204, initial_sfmcd);
|
|
return err;
|
|
}
|
|
|
|
static ssize_t broadsheet_loadstore_waveform(struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf, size_t len)
|
|
{
|
|
int err;
|
|
struct fb_info *info = dev_get_drvdata(dev);
|
|
struct broadsheetfb_par *par = info->par;
|
|
const struct firmware *fw_entry;
|
|
|
|
if (len < 1)
|
|
return -EINVAL;
|
|
|
|
err = request_firmware(&fw_entry, "broadsheet.wbf", dev);
|
|
if (err < 0) {
|
|
dev_err(dev, "Failed to get broadsheet waveform\n");
|
|
goto err_failed;
|
|
}
|
|
|
|
/* try to enforce reasonable min max on waveform */
|
|
if ((fw_entry->size < 8*1024) || (fw_entry->size > 64*1024)) {
|
|
dev_err(dev, "Invalid waveform\n");
|
|
err = -EINVAL;
|
|
goto err_failed;
|
|
}
|
|
|
|
mutex_lock(&(par->io_lock));
|
|
err = broadsheet_store_waveform_to_spiflash(par, fw_entry->data,
|
|
fw_entry->size);
|
|
|
|
mutex_unlock(&(par->io_lock));
|
|
if (err < 0) {
|
|
dev_err(dev, "Failed to store broadsheet waveform\n");
|
|
goto err_failed;
|
|
}
|
|
|
|
dev_info(dev, "Stored broadsheet waveform, size %zd\n", fw_entry->size);
|
|
|
|
return len;
|
|
|
|
err_failed:
|
|
return err;
|
|
}
|
|
static DEVICE_ATTR(loadstore_waveform, S_IWUSR, NULL,
|
|
broadsheet_loadstore_waveform);
|
|
|
|
/* upper level functions that manipulate the display and other stuff */
|
|
static void broadsheet_init_display(struct broadsheetfb_par *par)
|
|
{
|
|
u16 args[5];
|
|
int xres = par->info->var.xres;
|
|
int yres = par->info->var.yres;
|
|
|
|
args[0] = panel_table[par->panel_index].w;
|
|
args[1] = panel_table[par->panel_index].h;
|
|
args[2] = panel_table[par->panel_index].sdcfg;
|
|
args[3] = panel_table[par->panel_index].gdcfg;
|
|
args[4] = panel_table[par->panel_index].lutfmt;
|
|
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] = panel_table[par->panel_index].fsynclen;
|
|
args[1] = panel_table[par->panel_index].fendfbegin;
|
|
args[2] = panel_table[par->panel_index].lsynclen;
|
|
args[3] = panel_table[par->panel_index].lendlbegin;
|
|
args[4] = panel_table[par->panel_index].pixclk;
|
|
broadsheet_send_cmdargs(par, BS_CMD_INIT_DSPE_TMG, 5, args);
|
|
|
|
broadsheet_write_reg32(par, 0x310, xres*yres*2);
|
|
|
|
/* 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, (panel_table[par->panel_index].w *
|
|
panel_table[par->panel_index].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 broadsheet_identify(struct broadsheetfb_par *par)
|
|
{
|
|
u16 rev, prc;
|
|
struct device *dev = par->info->device;
|
|
|
|
rev = broadsheet_read_reg(par, BS_REG_REV);
|
|
prc = broadsheet_read_reg(par, BS_REG_PRC);
|
|
dev_info(dev, "Broadsheet Rev 0x%x, Product Code 0x%x\n", rev, prc);
|
|
|
|
if (prc != 0x0047)
|
|
dev_warn(dev, "Unrecognized Broadsheet Product Code\n");
|
|
if (rev != 0x0100)
|
|
dev_warn(dev, "Unrecognized Broadsheet Revision\n");
|
|
}
|
|
|
|
static void 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;
|
|
|
|
mutex_lock(&(par->io_lock));
|
|
/* 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);
|
|
mutex_unlock(&(par->io_lock));
|
|
|
|
}
|
|
|
|
static void broadsheetfb_dpy_update(struct broadsheetfb_par *par)
|
|
{
|
|
u16 args[5];
|
|
|
|
mutex_lock(&(par->io_lock));
|
|
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, (panel_table[par->panel_index].w *
|
|
panel_table[par->panel_index].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);
|
|
mutex_unlock(&(par->io_lock));
|
|
}
|
|
|
|
/* 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 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;
|
|
int dpyw, dpyh;
|
|
int panel_index;
|
|
|
|
/* 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;
|
|
|
|
switch (board->get_panel_type()) {
|
|
case 37:
|
|
panel_index = 1;
|
|
break;
|
|
case 97:
|
|
panel_index = 2;
|
|
break;
|
|
case 6:
|
|
default:
|
|
panel_index = 0;
|
|
break;
|
|
}
|
|
|
|
dpyw = panel_table[panel_index].w;
|
|
dpyh = panel_table[panel_index].h;
|
|
|
|
videomemorysize = roundup((dpyw*dpyh), PAGE_SIZE);
|
|
|
|
videomemory = vzalloc(videomemorysize);
|
|
if (!videomemory)
|
|
goto err_fb_rel;
|
|
|
|
info->screen_base = (char *)videomemory;
|
|
info->fbops = &broadsheetfb_ops;
|
|
|
|
broadsheetfb_var.xres = dpyw;
|
|
broadsheetfb_var.yres = dpyh;
|
|
broadsheetfb_var.xres_virtual = dpyw;
|
|
broadsheetfb_var.yres_virtual = dpyh;
|
|
info->var = broadsheetfb_var;
|
|
|
|
broadsheetfb_fix.line_length = dpyw;
|
|
info->fix = broadsheetfb_fix;
|
|
info->fix.smem_len = videomemorysize;
|
|
par = info->par;
|
|
par->panel_index = panel_index;
|
|
par->info = info;
|
|
par->board = board;
|
|
par->write_reg = broadsheet_write_reg;
|
|
par->read_reg = broadsheet_read_reg;
|
|
init_waitqueue_head(&par->waitq);
|
|
|
|
mutex_init(&par->io_lock);
|
|
|
|
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_identify(par);
|
|
|
|
broadsheet_init(par);
|
|
|
|
retval = register_framebuffer(info);
|
|
if (retval < 0)
|
|
goto err_free_irq;
|
|
|
|
platform_set_drvdata(dev, info);
|
|
|
|
retval = device_create_file(&dev->dev, &dev_attr_loadstore_waveform);
|
|
if (retval < 0)
|
|
goto err_unreg_fb;
|
|
|
|
fb_info(info, "Broadsheet frame buffer, using %dK of video memory\n",
|
|
videomemorysize >> 10);
|
|
|
|
|
|
return 0;
|
|
|
|
err_unreg_fb:
|
|
unregister_framebuffer(info);
|
|
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 broadsheetfb_remove(struct platform_device *dev)
|
|
{
|
|
struct fb_info *info = platform_get_drvdata(dev);
|
|
|
|
if (info) {
|
|
struct broadsheetfb_par *par = info->par;
|
|
|
|
device_remove_file(info->dev, &dev_attr_loadstore_waveform);
|
|
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",
|
|
},
|
|
};
|
|
module_platform_driver(broadsheetfb_driver);
|
|
|
|
MODULE_DESCRIPTION("fbdev driver for Broadsheet controller");
|
|
MODULE_AUTHOR("Jaya Kumar");
|
|
MODULE_LICENSE("GPL");
|