[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/os/linux/linux-3.4.x/drivers/video/broadsheetfb.c b/ap/os/linux/linux-3.4.x/drivers/video/broadsheetfb.c
new file mode 100644
index 0000000..377dde3
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/video/broadsheetfb.c
@@ -0,0 +1,1236 @@
+/*
+ * 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, ®);
+ 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 __devinit 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 __devinit 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 __devinit broadsheet_init(struct broadsheetfb_par *par)
+{
+ broadsheet_send_command(par, BS_CMD_INIT_SYS_RUN);
+ /* the controller needs a second */
+ msleep(1000);
+ broadsheet_init_display(par);
+}
+
+static void broadsheetfb_dpy_update_pages(struct broadsheetfb_par *par,
+ u16 y1, u16 y2)
+{
+ u16 args[5];
+ unsigned char *buf = (unsigned char *)par->info->screen_base;
+
+ 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 __devinit broadsheetfb_probe(struct platform_device *dev)
+{
+ struct fb_info *info;
+ struct broadsheet_board *board;
+ int retval = -ENOMEM;
+ int videomemorysize;
+ unsigned char *videomemory;
+ struct broadsheetfb_par *par;
+ int i;
+ 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;
+
+ printk(KERN_INFO
+ "fb%d: Broadsheet frame buffer, using %dK of video memory\n",
+ info->node, 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 __devexit 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",
+ },
+};
+
+static int __init broadsheetfb_init(void)
+{
+ return platform_driver_register(&broadsheetfb_driver);
+}
+
+static void __exit broadsheetfb_exit(void)
+{
+ platform_driver_unregister(&broadsheetfb_driver);
+}
+
+module_init(broadsheetfb_init);
+module_exit(broadsheetfb_exit);
+
+MODULE_DESCRIPTION("fbdev driver for Broadsheet controller");
+MODULE_AUTHOR("Jaya Kumar");
+MODULE_LICENSE("GPL");