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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
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#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 256static 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_buffer);
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 = par->info->screen_buffer;
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_buffer);
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_defio_damage_range(struct fb_info *info, off_t off, size_t len){ struct broadsheetfb_par *par = info->par;
broadsheetfb_dpy_update(par);}
static void broadsheetfb_defio_damage_area(struct fb_info *info, u32 x, u32 y, u32 width, u32 height){ struct broadsheetfb_par *par = info->par;
broadsheetfb_dpy_update(par);}
FB_GEN_DEFAULT_DEFERRED_SYSMEM_OPS(broadsheetfb, broadsheetfb_defio_damage_range, broadsheetfb_defio_damage_area)
static const struct fb_ops broadsheetfb_ops = { .owner = THIS_MODULE, FB_DEFAULT_DEFERRED_OPS(broadsheetfb),};
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_buffer = 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_VIRTFB;
info->fbdefio = &broadsheetfb_defio; retval = fb_deferred_io_init(info); if (retval) goto err_vfree;
retval = fb_alloc_cmap(&info->cmap, 16, 0); if (retval < 0) { dev_err(&dev->dev, "Failed to allocate colormap\n"); goto err_fbdefio; }
/* 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_fbdefio: fb_deferred_io_cleanup(info);err_vfree: vfree(videomemory);err_fb_rel: framebuffer_release(info);err: module_put(board->owner); return retval;
}
static void 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->device, &dev_attr_loadstore_waveform); unregister_framebuffer(info); fb_deferred_io_cleanup(info); par->board->cleanup(par); fb_dealloc_cmap(&info->cmap); vfree(info->screen_buffer); module_put(par->board->owner); framebuffer_release(info); }}
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");
MODULE_FIRMWARE("broadsheet.wbf");