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-rw-r--r--Kconfig9678logstatsplainblame
-rw-r--r--Makefile1707logstatsplainblame
-rw-r--r--amba-pl022.c53292logstatsplainblame
-rw-r--r--atmel_spi.c23923logstatsplainblame
-rw-r--r--atmel_spi.h4446logstatsplainblame
-rw-r--r--au1550_spi.c26531logstatsplainblame
-rw-r--r--mpc52xx_psc_spi.c14025logstatsplainblame
-rw-r--r--mpc52xx_spi.c14976logstatsplainblame
-rw-r--r--omap2_mcspi.c30867logstatsplainblame
-rw-r--r--omap_uwire.c13562logstatsplainblame
-rw-r--r--orion_spi.c13036logstatsplainblame
-rw-r--r--pxa2xx_spi.c46564logstatsplainblame
-rw-r--r--spi.c26097logstatsplainblame
-rw-r--r--spi_bfin5xx.c39124logstatsplainblame
-rw-r--r--spi_bitbang.c13526logstatsplainblame
-rw-r--r--spi_butterfly.c8711logstatsplainblame
-rw-r--r--spi_gpio.c10143logstatsplainblame
-rw-r--r--spi_imx.c17174logstatsplainblame
-rw-r--r--spi_lm70llp.c9479logstatsplainblame
-rw-r--r--spi_mpc8xxx.c22763logstatsplainblame
-rw-r--r--spi_ppc4xx.c14530logstatsplainblame
-rw-r--r--spi_s3c24xx.c11570logstatsplainblame
-rw-r--r--spi_s3c24xx_gpio.c5246logstatsplainblame
-rw-r--r--spi_sh_sci.c5061logstatsplainblame
-rw-r--r--spi_stmp.c16198logstatsplainblame
-rw-r--r--spi_txx9.c12156logstatsplainblame
-rw-r--r--spidev.c17485logstatsplainblame
-rw-r--r--tle62x0.c7580logstatsplainblame
-rw-r--r--xilinx_spi.c13227logstatsplainblame
-rw-r--r--xilinx_spi.h1056logstatsplainblame
-rw-r--r--xilinx_spi_of.c3473logstatsplainblame
-rw-r--r--xilinx_spi_pltfm.c2579logstatsplainblame
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/*
 * 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 __devinitdata = {
	.id =		"broadsheetfb",
	.type =		FB_TYPE_PACKED_PIXELS,
	.visual =	FB_VISUAL_STATIC_PSEUDOCOLOR,
	.xpanstep =	0,
	.ypanstep =	0,
	.ywrapstep =	0,
	.line_length =	DPY_W,
	.accel =	FB_ACCEL_NONE,
};

static struct fb_var_screeninfo broadsheetfb_var __devinitdata = {
	.xres		= DPY_W,
	.yres		= DPY_H,
	.xres_virtual	= DPY_W,
	.yres_virtual	= DPY_H,
	.bits_per_pixel	= 8,
	.grayscale	= 1,
	.red =		{ 0, 4, 0 },
	.green =	{ 0, 4, 0 },
	.blue =		{ 0, 4, 0 },
	.transp =	{ 0, 0, 0 },
};

/* main broadsheetfb functions */
static void broadsheet_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, &reg);
	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;