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1226 lines
28 KiB
1226 lines
28 KiB
/* |
|
* 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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|
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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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|
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#include <video/broadsheetfb.h> |
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|
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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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|
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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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|
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#define DPY_W 800 |
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#define DPY_H 600 |
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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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par->board->wait_for_rdy(par); |
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|
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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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|
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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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|
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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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} |
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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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|
|
|
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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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|
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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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|
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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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|
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par->board->set_ctl(par, BS_DC, 1); |
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|
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broadsheet_gpio_issue_data(par, reg); |
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broadsheet_gpio_issue_data(par, data); |
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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_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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} |
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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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|
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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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|
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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; |
|
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) |
|
return err; |
|
|
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tmp = broadsheet_read_reg(par, 0x200); |
|
|
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*data = tmp & 0xFF; |
|
|
|
return 0; |
|
} |
|
|
|
static int broadsheet_spiflash_wait_for_status(struct broadsheetfb_par *par, |
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int timeout) |
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{ |
|
u8 tmp; |
|
int err; |
|
|
|
do { |
|
broadsheet_write_reg(par, 0x0208, 1); |
|
|
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err = broadsheet_spiflash_write_byte(par, 0x05); |
|
if (err) |
|
goto failout; |
|
|
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err = broadsheet_spiflash_read_byte(par, &tmp); |
|
if (err) |
|
goto failout; |
|
|
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broadsheet_write_reg(par, 0x0208, 0); |
|
|
|
if (!(tmp & 0x1)) |
|
return 0; |
|
|
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mdelay(5); |
|
} while (timeout--); |
|
|
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dev_err(par->info->device, "Timed out waiting for spiflash status\n"); |
|
return -ETIMEDOUT; |
|
|
|
failout: |
|
broadsheet_write_reg(par, 0x0208, 0); |
|
return err; |
|
} |
|
|
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static int broadsheet_spiflash_op_on_address(struct broadsheetfb_par *par, |
|
u8 op, u32 addr) |
|
{ |
|
int i; |
|
u8 tmp; |
|
int err; |
|
|
|
broadsheet_write_reg(par, 0x0208, 1); |
|
|
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err = broadsheet_spiflash_write_byte(par, op); |
|
if (err) |
|
return err; |
|
|
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for (i = 2; i >= 0; i--) { |
|
tmp = ((addr >> (i * 8)) & 0xFF); |
|
err = broadsheet_spiflash_write_byte(par, tmp); |
|
if (err) |
|
return err; |
|
} |
|
|
|
return err; |
|
} |
|
|
|
static int broadsheet_verify_spiflash(struct broadsheetfb_par *par, |
|
int *flash_type) |
|
{ |
|
int err = 0; |
|
u8 sig; |
|
|
|
err = broadsheet_spiflash_op_on_address(par, 0xAB, 0x00000000); |
|
if (err) |
|
goto failout; |
|
|
|
err = broadsheet_spiflash_read_byte(par, &sig); |
|
if (err) |
|
goto failout; |
|
|
|
if ((sig != 0x10) && (sig != 0x11)) { |
|
dev_err(par->info->device, "Unexpected flash type\n"); |
|
err = -EINVAL; |
|
goto failout; |
|
} |
|
|
|
*flash_type = sig; |
|
|
|
failout: |
|
broadsheet_write_reg(par, 0x0208, 0); |
|
return err; |
|
} |
|
|
|
static int broadsheet_setup_for_wfm_write(struct broadsheetfb_par *par, |
|
u16 *initial_sfmcd, int *flash_type) |
|
|
|
{ |
|
int err; |
|
|
|
err = broadsheet_setup_plls(par); |
|
if (err) |
|
return err; |
|
|
|
broadsheet_write_reg(par, 0x0106, 0x0203); |
|
|
|
err = broadsheet_setup_spi(par); |
|
if (err) |
|
return err; |
|
|
|
err = broadsheet_setup_spiflash(par, initial_sfmcd); |
|
if (err) |
|
return err; |
|
|
|
return broadsheet_verify_spiflash(par, flash_type); |
|
} |
|
|
|
static int broadsheet_spiflash_write_control(struct broadsheetfb_par *par, |
|
int mode) |
|
{ |
|
int err; |
|
|
|
broadsheet_write_reg(par, 0x0208, 1); |
|
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(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) |
|
goto out; |
|
} |
|
|
|
/* 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) |
|
goto out; |
|
} |
|
|
|
/* 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) |
|
goto out; |
|
|
|
/* now write it */ |
|
err = broadsheet_spiflash_write_sector(par, start_sector_addr, |
|
sector_buffer, sector_size); |
|
out: |
|
kfree(sector_buffer); |
|
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_fw; |
|
} |
|
|
|
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_fw; |
|
} |
|
|
|
dev_info(dev, "Stored broadsheet waveform, size %zd\n", fw_entry->size); |
|
|
|
err = len; |
|
|
|
err_fw: |
|
release_firmware(fw_entry); |
|
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 *pagereflist) |
|
{ |
|
u16 y1 = 0, h = 0; |
|
unsigned long prev_offset = ULONG_MAX; |
|
struct fb_deferred_io_pageref *pageref; |
|
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(pageref, pagereflist, list) { |
|
if (prev_offset == ULONG_MAX) { |
|
/* just starting so assign first page */ |
|
y1 = pageref->offset / xres; |
|
h = h_inc; |
|
} else if ((prev_offset + PAGE_SIZE) == pageref->offset) { |
|
/* 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 = pageref->offset / xres; |
|
h = h_inc; |
|
} |
|
prev_offset = pageref->offset; |
|
} |
|
|
|
/* 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 const 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, |
|
.fb_mmap = fb_deferred_io_mmap, |
|
}; |
|
|
|
static struct fb_deferred_io broadsheetfb_defio = { |
|
.delay = HZ/4, |
|
.sort_pagereflist = true, |
|
.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 = { |
|
.name = "broadsheetfb", |
|
}, |
|
}; |
|
module_platform_driver(broadsheetfb_driver); |
|
|
|
MODULE_DESCRIPTION("fbdev driver for Broadsheet controller"); |
|
MODULE_AUTHOR("Jaya Kumar"); |
|
MODULE_LICENSE("GPL");
|
|
|