- 根目录:
- drivers
- video
- broadsheetfb.c
/*
* broadsheetfb.c -- FB driver for E-Ink Broadsheet controller
*
* Copyright (C) 2008, Jaya Kumar
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file COPYING in the main directory of this archive for
* more details.
*
* Layout is based on skeletonfb.c by James Simmons and Geert Uytterhoeven.
*
* This driver is written to be used with the Broadsheet display controller.
*
* It is intended to be architecture independent. A board specific driver
* must be used to perform all the physical IO interactions.
*
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/fb.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/list.h>
#include <linux/firmware.h>
#include <linux/uaccess.h>
#include <video/broadsheetfb.h>
/* track panel specific parameters */
struct panel_info {
int w;
int h;
u16 sdcfg;
u16 gdcfg;
u16 lutfmt;
u16 fsynclen;
u16 fendfbegin;
u16 lsynclen;
u16 lendlbegin;
u16 pixclk;
};
/* table of panel specific parameters to be indexed into by the board drivers */
static struct panel_info panel_table[] = {
{ /* standard 6" on TFT backplane */
.w = 800,
.h = 600,
.sdcfg = (100 | (1 << 8) | (1 << 9)),
.gdcfg = 2,
.lutfmt = (4 | (1 << 7)),
.fsynclen = 4,
.fendfbegin = (10 << 8) | 4,
.lsynclen = 10,
.lendlbegin = (100 << 8) | 4,
.pixclk = 6,
},
{ /* custom 3.7" flexible on PET or steel */
.w = 320,
.h = 240,
.sdcfg = (67 | (0 << 8) | (0 << 9) | (0 << 10) | (0 << 12)),
.gdcfg = 3,
.lutfmt = (4 | (1 << 7)),
.fsynclen = 0,
.fendfbegin = (80 << 8) | 4,
.lsynclen = 10,
.lendlbegin = (80 << 8) | 20,
.pixclk = 14,
},
{ /* standard 9.7" on TFT backplane */
.w = 1200,
.h = 825,
.sdcfg = (100 | (1 << 8) | (1 << 9) | (0 << 10) | (0 << 12)),
.gdcfg = 2,
.lutfmt = (4 | (1 << 7)),
.fsynclen = 0,
.fendfbegin = (4 << 8) | 4,
.lsynclen = 4,
.lendlbegin = (60 << 8) | 10,
.pixclk = 3,
},
};
#define DPY_W 800
#define DPY_H 600
static struct fb_fix_screeninfo broadsheetfb_fix = {
.id = "broadsheetfb",
.type = FB_TYPE_PACKED_PIXELS,
.visual = FB_VISUAL_STATIC_PSEUDOCOLOR,
.xpanstep = 0,
.ypanstep = 0,
.ywrapstep = 0,
.line_length = DPY_W,
.accel = FB_ACCEL_NONE,
};
static struct fb_var_screeninfo broadsheetfb_var = {
.xres = DPY_W,
.yres = DPY_H,
.xres_virtual = DPY_W,
.yres_virtual = DPY_H,
.bits_per_pixel = 8,
.grayscale = 1,
.red = { 0, 4, 0 },
.green = { 0, 4, 0 },
.blue = { 0, 4, 0 },
.transp = { 0, 0, 0 },
};
/* main broadsheetfb functions */
static void broadsheet_gpio_issue_data(struct broadsheetfb_par *par, u16 data)
{
par->board->set_ctl(par, BS_WR, 0);
par->board->set_hdb(par, data);
par->board->set_ctl(par, BS_WR, 1);
}
static void broadsheet_gpio_issue_cmd(struct broadsheetfb_par *par, u16 data)
{
par->board->set_ctl(par, BS_DC, 0);
broadsheet_gpio_issue_data(par, data);
}
static void broadsheet_gpio_send_command(struct broadsheetfb_par *par, u16 data)
{
par->board->wait_for_rdy(par);
par->board->set_ctl(par, BS_CS, 0);
broadsheet_gpio_issue_cmd(par, data);
par->board->set_ctl(par, BS_DC, 1);
par->board->set_ctl(par, BS_CS, 1);
}
static void broadsheet_gpio_send_cmdargs(struct broadsheetfb_par *par, u16 cmd,
int argc, u16 *argv)
{
int i;
par->board->wait_for_rdy(par);
par->board->set_ctl(par, BS_CS, 0);
broadsheet_gpio_issue_cmd(par, cmd);
par->board->set_ctl(par, BS_DC, 1);
for (i = 0; i < argc; i++)
broadsheet_gpio_issue_data(par, argv[i]);
par->board->set_ctl(par, BS_CS, 1);
}
static void broadsheet_mmio_send_cmdargs(struct broadsheetfb_par *par, u16 cmd,
int argc, u16 *argv)
{
int i;
par->board->mmio_write(par, BS_MMIO_CMD, cmd);
for (i = 0; i < argc; i++)
par->board->mmio_write(par, BS_MMIO_DATA, argv[i]);
}
static void broadsheet_send_command(struct broadsheetfb_par *par, u16 data)
{
if (par->board->mmio_write)
par->board->mmio_write(par, BS_MMIO_CMD, data);
else
broadsheet_gpio_send_command(par, data);
}
static void broadsheet_send_cmdargs(struct broadsheetfb_par *par, u16 cmd,
int argc, u16 *argv)
{
if (par->board->mmio_write)
broadsheet_mmio_send_cmdargs(par, cmd, argc, argv);
else
broadsheet_gpio_send_cmdargs(par, cmd, argc, argv);
}
static void broadsheet_gpio_burst_write(struct broadsheetfb_par *par, int size,
u16 *data)
{
int i;
u16 tmp;
par->board->set_ctl(par, BS_CS, 0);
par->board->set_ctl(par, BS_DC, 1);
for (i = 0; i < size; i++) {
par->board->set_ctl(par, BS_WR, 0);
tmp = (data[i] & 0x0F) << 4;
tmp |= (data[i] & 0x0F00) << 4;
par->board->set_hdb(par, tmp);
par->board->set_ctl(par, BS_WR, 1);
}
par->board->set_ctl(par, BS_CS, 1);
}
static void broadsheet_mmio_burst_write(struct broadsheetfb_par *par, int size,
u16 *data)
{
int i;
u16 tmp;
for (i = 0; i < size; i++) {
tmp = (data[i] & 0x0F) << 4;
tmp |= (data[i] & 0x0F00) << 4;
par->board->mmio_write(par, BS_MMIO_DATA, tmp);
}
}
static void broadsheet_burst_write(struct broadsheetfb_par *par, int size,
u16 *data)
{
if (par->board->mmio_write)
broadsheet_mmio_burst_write(par, size, data);
else
broadsheet_gpio_burst_write(par, size, data);
}
static u16 broadsheet_gpio_get_data(struct broadsheetfb_par *par)
{
u16 res;
/* wait for ready to go hi. (lo is busy) */
par->board->wait_for_rdy(par);
/* cs lo, dc lo for cmd, we lo for each data, db as usual */
par->board->set_ctl(par, BS_DC, 1);
par->board->set_ctl(par, BS_CS, 0);
par->board->set_ctl(par, BS_WR, 0);
res = par->board->get_hdb(par);
/* strobe wr */
par->board->set_ctl(par, BS_WR, 1);
par->board->set_ctl(par, BS_CS, 1);
return res;
}
static u16 broadsheet_get_data(struct broadsheetfb_par *par)
{
if (par->board->mmio_read)
return par->board->mmio_read(par);
else
return broadsheet_gpio_get_data(par);
}
static void broadsheet_gpio_write_reg(struct broadsheetfb_par *par, u16 reg,
u16 data)
{
/* wait for ready to go hi. (lo is busy) */
par->board->wait_for_rdy(par);
/* cs lo, dc lo for cmd, we lo for each data, db as usual */
par->board->set_ctl(par, BS_CS, 0);
broadsheet_gpio_issue_cmd(par, BS_CMD_WR_REG);
par->board->set_ctl(par, BS_DC, 1);
broadsheet_gpio_issue_data(par, reg);
broadsheet_gpio_issue_data(par, data);
par->board->set_ctl(par, BS_CS, 1);
}
static void broadsheet_mmio_write_reg(struct broadsheetfb_par *par, u16 reg,
u16 data)
{
par->board->mmio_write(par, BS_MMIO_CMD, BS_CMD_WR_REG);
par->board->mmio_write(par, BS_MMIO_DATA, reg);
par->board->mmio_write(par, BS_MMIO_DATA, data);
}
static void broadsheet_write_reg(struct broadsheetfb_par *par, u16 reg,
u16 data)
{
if (par->board->mmio_write)
broadsheet_mmio_write_reg(par, reg, data);
else
broadsheet_gpio_write_reg(par, reg, data);
}
static void broadsheet_write_reg32(struct broadsheetfb_par *par, u16 reg,
u32 data)
{
broadsheet_write_reg(par, reg, cpu_to_le32(data) & 0xFFFF);
broadsheet_write_reg(par, reg + 2, (cpu_to_le32(data) >> 16) & 0xFFFF);
}
static u16 broadsheet_read_reg(struct broadsheetfb_par *par, u16 reg)
{
broadsheet_send_cmdargs(par, BS_CMD_RD_REG, 1, ®);
par->board->wait_for_rdy(par);
return broadsheet_get_data(par);
}
/* functions for waveform manipulation */
static int is_broadsheet_pll_locked(struct broadsheetfb_par *par)
{
return broadsheet_read_reg(par, 0x000A) & 0x0001;
}
static int broadsheet_setup_plls(struct broadsheetfb_par *par)
{
int retry_count = 0;
u16 tmp;
/* disable arral saemipu mode */
broadsheet_write_reg(par, 0x0006, 0x0000);
broadsheet_write_reg(par, 0x0010, 0x0004);
broadsheet_write_reg(par, 0x0012, 0x5949);
broadsheet_write_reg(par, 0x0014, 0x0040);
broadsheet_write_reg(par, 0x0016, 0x0000);
do {
if (retry_count++ > 100)
return -ETIMEDOUT;
mdelay(1);
} while (!is_broadsheet_pll_locked(par));
tmp = broadsheet_read_reg(par, 0x0006);
tmp &= ~0x1;
broadsheet_write_reg(par, 0x0006, tmp);
return 0;
}
static int broadsheet_setup_spi(struct broadsheetfb_par *par)
{
broadsheet_write_reg(par, 0x0204, ((3 << 3) | 1));
broadsheet_write_reg(par, 0x0208, 0x0001);
return 0;
}
static int broadsheet_setup_spiflash(struct broadsheetfb_par *par,
u16 *orig_sfmcd)
{
*orig_sfmcd = broadsheet_read_reg(par, 0x0204);
broadsheet_write_reg(par, 0x0208, 0);
broadsheet_write_reg(par, 0x0204, 0);
broadsheet_write_reg(par, 0x0204, ((3 << 3) | 1));
return 0;
}
static int broadsheet_spiflash_wait_for_bit(struct broadsheetfb_par *par,
u16 reg, int bitnum, int val,
int timeout)
{
u16 tmp;
do {
tmp = broadsheet_read_reg(par, reg);
if (((tmp >> bitnum) & 1) == val)
return 0;
mdelay(1);
} while (timeout--);
return -ETIMEDOUT;
}
static int broadsheet_spiflash_write_byte(struct broadsheetfb_par *par, u8 data)
{
broadsheet_write_reg(par, 0x0202, (data | 0x100));
return broadsheet_spiflash_wait_for_bit(par, 0x0206, 3, 0, 100);
}
static int broadsheet_spiflash_read_byte(struct broadsheetfb_par *par, u8 *data)
{
int err;
u16 tmp;
broadsheet_write_reg(par, 0x0202, 0);
err = broadsheet_spiflash_wait_for_bit(par, 0x0206, 3, 0, 100);
if (err)
return err;
tmp = broadsheet_read_reg(par, 0x200);
*data = tmp & 0xFF;
return 0;
}
static int broadsheet_spiflash_wait_for_status(struct broadsheetfb_par *par,
int timeout)
{
u8 tmp;
int err;
do {
broadsheet_write_reg(par, 0x0208, 1);
err = broadsheet_spiflash_write_byte(par, 0x05);
if (err)
goto failout;
err = broadsheet_spiflash_read_byte(par, &tmp);
if (err)
goto failout;
broadsheet_write_reg(par, 0x0208, 0);
if (!(tmp & 0x1))
return 0;
mdelay(5);
} while (timeout--);
dev_err(par->info->device, "Timed out waiting for spiflash status\n");
return -ETIMEDOUT;
failout:
broadsheet_write_reg(par, 0x0208, 0);
return err;
}
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);
err = broadsheet_spiflash_write_byte(par, op);
if (err)
return err;
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(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");