diff options
Diffstat (limited to 'drivers/video/fbdev/auo_k190x.c')
| -rw-r--r-- | drivers/video/fbdev/auo_k190x.c | 1198 |
1 files changed, 1198 insertions, 0 deletions
diff --git a/drivers/video/fbdev/auo_k190x.c b/drivers/video/fbdev/auo_k190x.c new file mode 100644 index 000000000000..8d2499d1cafb --- /dev/null +++ b/drivers/video/fbdev/auo_k190x.c @@ -0,0 +1,1198 @@ +/* + * Common code for AUO-K190X framebuffer drivers + * + * Copyright (C) 2012 Heiko Stuebner <heiko@sntech.de> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/gpio.h> +#include <linux/platform_device.h> +#include <linux/pm_runtime.h> +#include <linux/fb.h> +#include <linux/delay.h> +#include <linux/uaccess.h> +#include <linux/vmalloc.h> +#include <linux/regulator/consumer.h> + +#include <video/auo_k190xfb.h> + +#include "auo_k190x.h" + +struct panel_info { + int w; + int h; +}; + +/* table of panel specific parameters to be indexed into by the board drivers */ +static struct panel_info panel_table[] = { + /* standard 6" */ + [AUOK190X_RESOLUTION_800_600] = { + .w = 800, + .h = 600, + }, + /* standard 9" */ + [AUOK190X_RESOLUTION_1024_768] = { + .w = 1024, + .h = 768, + }, + [AUOK190X_RESOLUTION_600_800] = { + .w = 600, + .h = 800, + }, + [AUOK190X_RESOLUTION_768_1024] = { + .w = 768, + .h = 1024, + }, +}; + +/* + * private I80 interface to the board driver + */ + +static void auok190x_issue_data(struct auok190xfb_par *par, u16 data) +{ + par->board->set_ctl(par, AUOK190X_I80_WR, 0); + par->board->set_hdb(par, data); + par->board->set_ctl(par, AUOK190X_I80_WR, 1); +} + +static void auok190x_issue_cmd(struct auok190xfb_par *par, u16 data) +{ + par->board->set_ctl(par, AUOK190X_I80_DC, 0); + auok190x_issue_data(par, data); + par->board->set_ctl(par, AUOK190X_I80_DC, 1); +} + +/** + * Conversion of 16bit color to 4bit grayscale + * does roughly (0.3 * R + 0.6 G + 0.1 B) / 2 + */ +static inline int rgb565_to_gray4(u16 data, struct fb_var_screeninfo *var) +{ + return ((((data & 0xF800) >> var->red.offset) * 77 + + ((data & 0x07E0) >> (var->green.offset + 1)) * 151 + + ((data & 0x1F) >> var->blue.offset) * 28) >> 8 >> 1); +} + +static int auok190x_issue_pixels_rgb565(struct auok190xfb_par *par, int size, + u16 *data) +{ + struct fb_var_screeninfo *var = &par->info->var; + struct device *dev = par->info->device; + int i; + u16 tmp; + + if (size & 7) { + dev_err(dev, "issue_pixels: size %d must be a multiple of 8\n", + size); + return -EINVAL; + } + + for (i = 0; i < (size >> 2); i++) { + par->board->set_ctl(par, AUOK190X_I80_WR, 0); + + tmp = (rgb565_to_gray4(data[4*i], var) & 0x000F); + tmp |= (rgb565_to_gray4(data[4*i+1], var) << 4) & 0x00F0; + tmp |= (rgb565_to_gray4(data[4*i+2], var) << 8) & 0x0F00; + tmp |= (rgb565_to_gray4(data[4*i+3], var) << 12) & 0xF000; + + par->board->set_hdb(par, tmp); + par->board->set_ctl(par, AUOK190X_I80_WR, 1); + } + + return 0; +} + +static int auok190x_issue_pixels_gray8(struct auok190xfb_par *par, int size, + u16 *data) +{ + struct device *dev = par->info->device; + int i; + u16 tmp; + + if (size & 3) { + dev_err(dev, "issue_pixels: size %d must be a multiple of 4\n", + size); + return -EINVAL; + } + + for (i = 0; i < (size >> 1); i++) { + par->board->set_ctl(par, AUOK190X_I80_WR, 0); + + /* simple reduction of 8bit staticgray to 4bit gray + * combines 4 * 4bit pixel values into a 16bit value + */ + tmp = (data[2*i] & 0xF0) >> 4; + tmp |= (data[2*i] & 0xF000) >> 8; + tmp |= (data[2*i+1] & 0xF0) << 4; + tmp |= (data[2*i+1] & 0xF000); + + par->board->set_hdb(par, tmp); + par->board->set_ctl(par, AUOK190X_I80_WR, 1); + } + + return 0; +} + +static int auok190x_issue_pixels(struct auok190xfb_par *par, int size, + u16 *data) +{ + struct fb_info *info = par->info; + struct device *dev = par->info->device; + + if (info->var.bits_per_pixel == 8 && info->var.grayscale) + auok190x_issue_pixels_gray8(par, size, data); + else if (info->var.bits_per_pixel == 16) + auok190x_issue_pixels_rgb565(par, size, data); + else + dev_err(dev, "unsupported color mode (bits: %d, gray: %d)\n", + info->var.bits_per_pixel, info->var.grayscale); + + return 0; +} + +static u16 auok190x_read_data(struct auok190xfb_par *par) +{ + u16 data; + + par->board->set_ctl(par, AUOK190X_I80_OE, 0); + data = par->board->get_hdb(par); + par->board->set_ctl(par, AUOK190X_I80_OE, 1); + + return data; +} + +/* + * Command interface for the controller drivers + */ + +void auok190x_send_command_nowait(struct auok190xfb_par *par, u16 data) +{ + par->board->set_ctl(par, AUOK190X_I80_CS, 0); + auok190x_issue_cmd(par, data); + par->board->set_ctl(par, AUOK190X_I80_CS, 1); +} +EXPORT_SYMBOL_GPL(auok190x_send_command_nowait); + +void auok190x_send_cmdargs_nowait(struct auok190xfb_par *par, u16 cmd, + int argc, u16 *argv) +{ + int i; + + par->board->set_ctl(par, AUOK190X_I80_CS, 0); + auok190x_issue_cmd(par, cmd); + + for (i = 0; i < argc; i++) + auok190x_issue_data(par, argv[i]); + par->board->set_ctl(par, AUOK190X_I80_CS, 1); +} +EXPORT_SYMBOL_GPL(auok190x_send_cmdargs_nowait); + +int auok190x_send_command(struct auok190xfb_par *par, u16 data) +{ + int ret; + + ret = par->board->wait_for_rdy(par); + if (ret) + return ret; + + auok190x_send_command_nowait(par, data); + return 0; +} +EXPORT_SYMBOL_GPL(auok190x_send_command); + +int auok190x_send_cmdargs(struct auok190xfb_par *par, u16 cmd, + int argc, u16 *argv) +{ + int ret; + + ret = par->board->wait_for_rdy(par); + if (ret) + return ret; + + auok190x_send_cmdargs_nowait(par, cmd, argc, argv); + return 0; +} +EXPORT_SYMBOL_GPL(auok190x_send_cmdargs); + +int auok190x_read_cmdargs(struct auok190xfb_par *par, u16 cmd, + int argc, u16 *argv) +{ + int i, ret; + + ret = par->board->wait_for_rdy(par); + if (ret) + return ret; + + par->board->set_ctl(par, AUOK190X_I80_CS, 0); + auok190x_issue_cmd(par, cmd); + + for (i = 0; i < argc; i++) + argv[i] = auok190x_read_data(par); + par->board->set_ctl(par, AUOK190X_I80_CS, 1); + + return 0; +} +EXPORT_SYMBOL_GPL(auok190x_read_cmdargs); + +void auok190x_send_cmdargs_pixels_nowait(struct auok190xfb_par *par, u16 cmd, + int argc, u16 *argv, int size, u16 *data) +{ + int i; + + par->board->set_ctl(par, AUOK190X_I80_CS, 0); + + auok190x_issue_cmd(par, cmd); + + for (i = 0; i < argc; i++) + auok190x_issue_data(par, argv[i]); + + auok190x_issue_pixels(par, size, data); + + par->board->set_ctl(par, AUOK190X_I80_CS, 1); +} +EXPORT_SYMBOL_GPL(auok190x_send_cmdargs_pixels_nowait); + +int auok190x_send_cmdargs_pixels(struct auok190xfb_par *par, u16 cmd, + int argc, u16 *argv, int size, u16 *data) +{ + int ret; + + ret = par->board->wait_for_rdy(par); + if (ret) + return ret; + + auok190x_send_cmdargs_pixels_nowait(par, cmd, argc, argv, size, data); + + return 0; +} +EXPORT_SYMBOL_GPL(auok190x_send_cmdargs_pixels); + +/* + * fbdefio callbacks - common on both controllers. + */ + +static void auok190xfb_dpy_first_io(struct fb_info *info) +{ + /* tell runtime-pm that we wish to use the device in a short time */ + pm_runtime_get(info->device); +} + +/* this is called back from the deferred io workqueue */ +static void auok190xfb_dpy_deferred_io(struct fb_info *info, + struct list_head *pagelist) +{ + struct fb_deferred_io *fbdefio = info->fbdefio; + struct auok190xfb_par *par = info->par; + u16 line_length = info->fix.line_length; + u16 yres = info->var.yres; + u16 y1 = 0, h = 0; + int prev_index = -1; + struct page *cur; + int h_inc; + int threshold; + + if (!list_empty(pagelist)) + /* the device resume should've been requested through first_io, + * if the resume did not finish until now, wait for it. + */ + pm_runtime_barrier(info->device); + else + /* We reached this via the fsync or some other way. + * In either case the first_io function did not run, + * so we runtime_resume the device here synchronously. + */ + pm_runtime_get_sync(info->device); + + /* Do a full screen update every n updates to prevent + * excessive darkening of the Sipix display. + * If we do this, there is no need to walk the pages. + */ + if (par->need_refresh(par)) { + par->update_all(par); + goto out; + } + + /* height increment is fixed per page */ + h_inc = DIV_ROUND_UP(PAGE_SIZE , line_length); + + /* calculate number of pages from pixel height */ + threshold = par->consecutive_threshold / h_inc; + if (threshold < 1) + threshold = 1; + + /* 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) / line_length; + h = h_inc; + } else if ((cur->index - prev_index) <= threshold) { + /* page is within our threshold for single updates */ + h += h_inc * (cur->index - prev_index); + } else { + /* page not consecutive, issue previous update first */ + par->update_partial(par, y1, y1 + h); + + /* start over with our non consecutive page */ + y1 = (cur->index << PAGE_SHIFT) / line_length; + 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 */ + par->update_all(par); + else + par->update_partial(par, y1, min((u16) (y1 + h), yres)); + +out: + pm_runtime_mark_last_busy(info->device); + pm_runtime_put_autosuspend(info->device); +} + +/* + * framebuffer operations + */ + +/* + * 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 auok190xfb_write(struct fb_info *info, const char __user *buf, + size_t count, loff_t *ppos) +{ + struct auok190xfb_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; + + par->update_all(par); + + return (err) ? err : count; +} + +static void auok190xfb_fillrect(struct fb_info *info, + const struct fb_fillrect *rect) +{ + struct auok190xfb_par *par = info->par; + + sys_fillrect(info, rect); + + par->update_all(par); +} + +static void auok190xfb_copyarea(struct fb_info *info, + const struct fb_copyarea *area) +{ + struct auok190xfb_par *par = info->par; + + sys_copyarea(info, area); + + par->update_all(par); +} + +static void auok190xfb_imageblit(struct fb_info *info, + const struct fb_image *image) +{ + struct auok190xfb_par *par = info->par; + + sys_imageblit(info, image); + + par->update_all(par); +} + +static int auok190xfb_check_var(struct fb_var_screeninfo *var, + struct fb_info *info) +{ + struct device *dev = info->device; + struct auok190xfb_par *par = info->par; + struct panel_info *panel = &panel_table[par->resolution]; + int size; + + /* + * Color depth + */ + + if (var->bits_per_pixel == 8 && var->grayscale == 1) { + /* + * For 8-bit grayscale, R, G, and B offset are equal. + */ + var->red.length = 8; + var->red.offset = 0; + var->red.msb_right = 0; + + var->green.length = 8; + var->green.offset = 0; + var->green.msb_right = 0; + + var->blue.length = 8; + var->blue.offset = 0; + var->blue.msb_right = 0; + + var->transp.length = 0; + var->transp.offset = 0; + var->transp.msb_right = 0; + } else if (var->bits_per_pixel == 16) { + var->red.length = 5; + var->red.offset = 11; + var->red.msb_right = 0; + + var->green.length = 6; + var->green.offset = 5; + var->green.msb_right = 0; + + var->blue.length = 5; + var->blue.offset = 0; + var->blue.msb_right = 0; + + var->transp.length = 0; + var->transp.offset = 0; + var->transp.msb_right = 0; + } else { + dev_warn(dev, "unsupported color mode (bits: %d, grayscale: %d)\n", + info->var.bits_per_pixel, info->var.grayscale); + return -EINVAL; + } + + /* + * Dimensions + */ + + switch (var->rotate) { + case FB_ROTATE_UR: + case FB_ROTATE_UD: + var->xres = panel->w; + var->yres = panel->h; + break; + case FB_ROTATE_CW: + case FB_ROTATE_CCW: + var->xres = panel->h; + var->yres = panel->w; + break; + default: + dev_dbg(dev, "Invalid rotation request\n"); + return -EINVAL; + } + + var->xres_virtual = var->xres; + var->yres_virtual = var->yres; + + /* + * Memory limit + */ + + size = var->xres_virtual * var->yres_virtual * var->bits_per_pixel / 8; + if (size > info->fix.smem_len) { + dev_err(dev, "Memory limit exceeded, requested %dK\n", + size >> 10); + return -ENOMEM; + } + + return 0; +} + +static int auok190xfb_set_fix(struct fb_info *info) +{ + struct fb_fix_screeninfo *fix = &info->fix; + struct fb_var_screeninfo *var = &info->var; + + fix->line_length = var->xres_virtual * var->bits_per_pixel / 8; + + fix->type = FB_TYPE_PACKED_PIXELS; + fix->accel = FB_ACCEL_NONE; + fix->visual = (var->grayscale) ? FB_VISUAL_STATIC_PSEUDOCOLOR + : FB_VISUAL_TRUECOLOR; + fix->xpanstep = 0; + fix->ypanstep = 0; + fix->ywrapstep = 0; + + return 0; +} + +static int auok190xfb_set_par(struct fb_info *info) +{ + struct auok190xfb_par *par = info->par; + + par->rotation = info->var.rotate; + auok190xfb_set_fix(info); + + /* reinit the controller to honor the rotation */ + par->init(par); + + /* wait for init to complete */ + par->board->wait_for_rdy(par); + + return 0; +} + +static struct fb_ops auok190xfb_ops = { + .owner = THIS_MODULE, + .fb_read = fb_sys_read, + .fb_write = auok190xfb_write, + .fb_fillrect = auok190xfb_fillrect, + .fb_copyarea = auok190xfb_copyarea, + .fb_imageblit = auok190xfb_imageblit, + .fb_check_var = auok190xfb_check_var, + .fb_set_par = auok190xfb_set_par, +}; + +/* + * Controller-functions common to both K1900 and K1901 + */ + +static int auok190x_read_temperature(struct auok190xfb_par *par) +{ + struct device *dev = par->info->device; + u16 data[4]; + int temp; + + pm_runtime_get_sync(dev); + + mutex_lock(&(par->io_lock)); + + auok190x_read_cmdargs(par, AUOK190X_CMD_READ_VERSION, 4, data); + + mutex_unlock(&(par->io_lock)); + + pm_runtime_mark_last_busy(dev); + pm_runtime_put_autosuspend(dev); + + /* sanitize and split of half-degrees for now */ + temp = ((data[0] & AUOK190X_VERSION_TEMP_MASK) >> 1); + + /* handle positive and negative temperatures */ + if (temp >= 201) + return (255 - temp + 1) * (-1); + else + return temp; +} + +static void auok190x_identify(struct auok190xfb_par *par) +{ + struct device *dev = par->info->device; + u16 data[4]; + + pm_runtime_get_sync(dev); + + mutex_lock(&(par->io_lock)); + + auok190x_read_cmdargs(par, AUOK190X_CMD_READ_VERSION, 4, data); + + mutex_unlock(&(par->io_lock)); + + par->epd_type = data[1] & AUOK190X_VERSION_TEMP_MASK; + + par->panel_size_int = AUOK190X_VERSION_SIZE_INT(data[2]); + par->panel_size_float = AUOK190X_VERSION_SIZE_FLOAT(data[2]); + par->panel_model = AUOK190X_VERSION_MODEL(data[2]); + + par->tcon_version = AUOK190X_VERSION_TCON(data[3]); + par->lut_version = AUOK190X_VERSION_LUT(data[3]); + + dev_dbg(dev, "panel %d.%din, model 0x%x, EPD 0x%x TCON-rev 0x%x, LUT-rev 0x%x", + par->panel_size_int, par->panel_size_float, par->panel_model, + par->epd_type, par->tcon_version, par->lut_version); + + pm_runtime_mark_last_busy(dev); + pm_runtime_put_autosuspend(dev); +} + +/* + * Sysfs functions + */ + +static ssize_t update_mode_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct fb_info *info = dev_get_drvdata(dev); + struct auok190xfb_par *par = info->par; + + return sprintf(buf, "%d\n", par->update_mode); +} + +static ssize_t update_mode_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct fb_info *info = dev_get_drvdata(dev); + struct auok190xfb_par *par = info->par; + int mode, ret; + + ret = kstrtoint(buf, 10, &mode); + if (ret) + return ret; + + par->update_mode = mode; + + /* if we enter a better mode, do a full update */ + if (par->last_mode > 1 && mode < par->last_mode) + par->update_all(par); + + return count; +} + +static ssize_t flash_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct fb_info *info = dev_get_drvdata(dev); + struct auok190xfb_par *par = info->par; + + return sprintf(buf, "%d\n", par->flash); +} + +static ssize_t flash_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct fb_info *info = dev_get_drvdata(dev); + struct auok190xfb_par *par = info->par; + int flash, ret; + + ret = kstrtoint(buf, 10, &flash); + if (ret) + return ret; + + if (flash > 0) + par->flash = 1; + else + par->flash = 0; + + return count; +} + +static ssize_t temp_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct fb_info *info = dev_get_drvdata(dev); + struct auok190xfb_par *par = info->par; + int temp; + + temp = auok190x_read_temperature(par); + return sprintf(buf, "%d\n", temp); +} + +static DEVICE_ATTR(update_mode, 0644, update_mode_show, update_mode_store); +static DEVICE_ATTR(flash, 0644, flash_show, flash_store); +static DEVICE_ATTR(temp, 0644, temp_show, NULL); + +static struct attribute *auok190x_attributes[] = { + &dev_attr_update_mode.attr, + &dev_attr_flash.attr, + &dev_attr_temp.attr, + NULL +}; + +static const struct attribute_group auok190x_attr_group = { + .attrs = auok190x_attributes, +}; + +static int auok190x_power(struct auok190xfb_par *par, bool on) +{ + struct auok190x_board *board = par->board; + int ret; + + if (on) { + /* We should maintain POWER up for at least 80ms before set + * RST_N and SLP_N to high (TCON spec 20100803_v35 p59) + */ + ret = regulator_enable(par->regulator); + if (ret) + return ret; + + msleep(200); + gpio_set_value(board->gpio_nrst, 1); + gpio_set_value(board->gpio_nsleep, 1); + msleep(200); + } else { + regulator_disable(par->regulator); + gpio_set_value(board->gpio_nrst, 0); + gpio_set_value(board->gpio_nsleep, 0); + } + + return 0; +} + +/* + * Recovery - powercycle the controller + */ + +static void auok190x_recover(struct auok190xfb_par *par) +{ + struct device *dev = par->info->device; + + auok190x_power(par, 0); + msleep(100); + auok190x_power(par, 1); + + /* after powercycling the device, it's always active */ + pm_runtime_set_active(dev); + par->standby = 0; + + par->init(par); + + /* wait for init to complete */ + par->board->wait_for_rdy(par); +} + +/* + * Power-management + */ + +#ifdef CONFIG_PM +static int auok190x_runtime_suspend(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct fb_info *info = platform_get_drvdata(pdev); + struct auok190xfb_par *par = info->par; + struct auok190x_board *board = par->board; + u16 standby_param; + + /* take and keep the lock until we are resumed, as the controller + * will never reach the non-busy state when in standby mode + */ + mutex_lock(&(par->io_lock)); + + if (par->standby) { + dev_warn(dev, "already in standby, runtime-pm pairing mismatch\n"); + mutex_unlock(&(par->io_lock)); + return 0; + } + + /* according to runtime_pm.txt runtime_suspend only means, that the + * device will not process data and will not communicate with the CPU + * As we hold the lock, this stays true even without standby + */ + if (board->quirks & AUOK190X_QUIRK_STANDBYBROKEN) { + dev_dbg(dev, "runtime suspend without standby\n"); + goto finish; + } else if (board->quirks & AUOK190X_QUIRK_STANDBYPARAM) { + /* for some TCON versions STANDBY expects a parameter (0) but + * it seems the real tcon version has to be determined yet. + */ + dev_dbg(dev, "runtime suspend with additional empty param\n"); + standby_param = 0; + auok190x_send_cmdargs(par, AUOK190X_CMD_STANDBY, 1, + &standby_param); + } else { + dev_dbg(dev, "runtime suspend without param\n"); + auok190x_send_command(par, AUOK190X_CMD_STANDBY); + } + + msleep(64); + +finish: + par->standby = 1; + + return 0; +} + +static int auok190x_runtime_resume(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct fb_info *info = platform_get_drvdata(pdev); + struct auok190xfb_par *par = info->par; + struct auok190x_board *board = par->board; + + if (!par->standby) { + dev_warn(dev, "not in standby, runtime-pm pairing mismatch\n"); + return 0; + } + + if (board->quirks & AUOK190X_QUIRK_STANDBYBROKEN) { + dev_dbg(dev, "runtime resume without standby\n"); + } else { + /* when in standby, controller is always busy + * and only accepts the wakeup command + */ + dev_dbg(dev, "runtime resume from standby\n"); + auok190x_send_command_nowait(par, AUOK190X_CMD_WAKEUP); + + msleep(160); + + /* wait for the controller to be ready and release the lock */ + board->wait_for_rdy(par); + } + + par->standby = 0; + + mutex_unlock(&(par->io_lock)); + + return 0; +} + +static int auok190x_suspend(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct fb_info *info = platform_get_drvdata(pdev); + struct auok190xfb_par *par = info->par; + struct auok190x_board *board = par->board; + int ret; + + dev_dbg(dev, "suspend\n"); + if (board->quirks & AUOK190X_QUIRK_STANDBYBROKEN) { + /* suspend via powering off the ic */ + dev_dbg(dev, "suspend with broken standby\n"); + + auok190x_power(par, 0); + } else { + dev_dbg(dev, "suspend using sleep\n"); + + /* the sleep state can only be entered from the standby state. + * pm_runtime_get_noresume gets called before the suspend call. + * So the devices usage count is >0 but it is not necessarily + * active. + */ + if (!pm_runtime_status_suspended(dev)) { + ret = auok190x_runtime_suspend(dev); + if (ret < 0) { + dev_err(dev, "auok190x_runtime_suspend failed with %d\n", + ret); + return ret; + } + par->manual_standby = 1; + } + + gpio_direction_output(board->gpio_nsleep, 0); + } + + msleep(100); + + return 0; +} + +static int auok190x_resume(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct fb_info *info = platform_get_drvdata(pdev); + struct auok190xfb_par *par = info->par; + struct auok190x_board *board = par->board; + + dev_dbg(dev, "resume\n"); + if (board->quirks & AUOK190X_QUIRK_STANDBYBROKEN) { + dev_dbg(dev, "resume with broken standby\n"); + + auok190x_power(par, 1); + + par->init(par); + } else { + dev_dbg(dev, "resume from sleep\n"); + + /* device should be in runtime suspend when we were suspended + * and pm_runtime_put_sync gets called after this function. + * So there is no need to touch the standby mode here at all. + */ + gpio_direction_output(board->gpio_nsleep, 1); + msleep(100); + + /* an additional init call seems to be necessary after sleep */ + auok190x_runtime_resume(dev); + par->init(par); + + /* if we were runtime-suspended before, suspend again*/ + if (!par->manual_standby) + auok190x_runtime_suspend(dev); + else + par->manual_standby = 0; + } + + return 0; +} +#endif + +const struct dev_pm_ops auok190x_pm = { + SET_RUNTIME_PM_OPS(auok190x_runtime_suspend, auok190x_runtime_resume, + NULL) + SET_SYSTEM_SLEEP_PM_OPS(auok190x_suspend, auok190x_resume) +}; +EXPORT_SYMBOL_GPL(auok190x_pm); + +/* + * Common probe and remove code + */ + +int auok190x_common_probe(struct platform_device *pdev, + struct auok190x_init_data *init) +{ + struct auok190x_board *board = init->board; + struct auok190xfb_par *par; + struct fb_info *info; + struct panel_info *panel; + int videomemorysize, ret; + unsigned char *videomemory; + + /* check board contents */ + if (!board->init || !board->cleanup || !board->wait_for_rdy + || !board->set_ctl || !board->set_hdb || !board->get_hdb + || !board->setup_irq) + return -EINVAL; + + info = framebuffer_alloc(sizeof(struct auok190xfb_par), &pdev->dev); + if (!info) + return -ENOMEM; + + par = info->par; + par->info = info; + par->board = board; + par->recover = auok190x_recover; + par->update_partial = init->update_partial; + par->update_all = init->update_all; + par->need_refresh = init->need_refresh; + par->init = init->init; + + /* init update modes */ + par->update_cnt = 0; + par->update_mode = -1; + par->last_mode = -1; + par->flash = 0; + + par->regulator = regulator_get(info->device, "vdd"); + if (IS_ERR(par->regulator)) { + ret = PTR_ERR(par->regulator); + dev_err(info->device, "Failed to get regulator: %d\n", ret); + goto err_reg; + } + + ret = board->init(par); + if (ret) { + dev_err(info->device, "board init failed, %d\n", ret); + goto err_board; + } + + ret = gpio_request(board->gpio_nsleep, "AUOK190x sleep"); + if (ret) { + dev_err(info->device, "could not request sleep gpio, %d\n", + ret); + goto err_gpio1; + } + + ret = gpio_direction_output(board->gpio_nsleep, 0); + if (ret) { + dev_err(info->device, "could not set sleep gpio, %d\n", ret); + goto err_gpio2; + } + + ret = gpio_request(board->gpio_nrst, "AUOK190x reset"); + if (ret) { + dev_err(info->device, "could not request reset gpio, %d\n", + ret); + goto err_gpio2; + } + + ret = gpio_direction_output(board->gpio_nrst, 0); + if (ret) { + dev_err(info->device, "could not set reset gpio, %d\n", ret); + goto err_gpio3; + } + + ret = auok190x_power(par, 1); + if (ret) { + dev_err(info->device, "could not power on the device, %d\n", + ret); + goto err_gpio3; + } + + mutex_init(&par->io_lock); + + init_waitqueue_head(&par->waitq); + + ret = par->board->setup_irq(par->info); + if (ret) { + dev_err(info->device, "could not setup ready-irq, %d\n", ret); + goto err_irq; + } + + /* wait for init to complete */ + par->board->wait_for_rdy(par); + + /* + * From here on the controller can talk to us + */ + + /* initialise fix, var, resolution and rotation */ + + strlcpy(info->fix.id, init->id, 16); + info->var.bits_per_pixel = 8; + info->var.grayscale = 1; + + panel = &panel_table[board->resolution]; + + par->resolution = board->resolution; + par->rotation = 0; + + /* videomemory handling */ + + videomemorysize = roundup((panel->w * panel->h) * 2, PAGE_SIZE); + videomemory = vmalloc(videomemorysize); + if (!videomemory) { + ret = -ENOMEM; + goto err_irq; + } + + memset(videomemory, 0, videomemorysize); + info->screen_base = (char *)videomemory; + info->fix.smem_len = videomemorysize; + + info->flags = FBINFO_FLAG_DEFAULT | FBINFO_VIRTFB; + info->fbops = &auok190xfb_ops; + + ret = auok190xfb_check_var(&info->var, info); + if (ret) + goto err_defio; + + auok190xfb_set_fix(info); + + /* deferred io init */ + + info->fbdefio = devm_kzalloc(info->device, + sizeof(struct fb_deferred_io), + GFP_KERNEL); + if (!info->fbdefio) { + dev_err(info->device, "Failed to allocate memory\n"); + ret = -ENOMEM; + goto err_defio; + } + + dev_dbg(info->device, "targeting %d frames per second\n", board->fps); + info->fbdefio->delay = HZ / board->fps; + info->fbdefio->first_io = auok190xfb_dpy_first_io, + info->fbdefio->deferred_io = auok190xfb_dpy_deferred_io, + fb_deferred_io_init(info); + + /* color map */ + + ret = fb_alloc_cmap(&info->cmap, 256, 0); + if (ret < 0) { + dev_err(info->device, "Failed to allocate colormap\n"); + goto err_cmap; + } + + /* controller init */ + + par->consecutive_threshold = 100; + par->init(par); + auok190x_identify(par); + + platform_set_drvdata(pdev, info); + + ret = register_framebuffer(info); + if (ret < 0) + goto err_regfb; + + ret = sysfs_create_group(&info->device->kobj, &auok190x_attr_group); + if (ret) + goto err_sysfs; + + dev_info(info->device, "fb%d: %dx%d using %dK of video memory\n", + info->node, info->var.xres, info->var.yres, + videomemorysize >> 10); + + /* increase autosuspend_delay when we use alternative methods + * for runtime_pm + */ + par->autosuspend_delay = (board->quirks & AUOK190X_QUIRK_STANDBYBROKEN) + ? 1000 : 200; + + pm_runtime_set_active(info->device); + pm_runtime_enable(info->device); + pm_runtime_set_autosuspend_delay(info->device, par->autosuspend_delay); + pm_runtime_use_autosuspend(info->device); + + return 0; + +err_sysfs: + unregister_framebuffer(info); +err_regfb: + fb_dealloc_cmap(&info->cmap); +err_cmap: + fb_deferred_io_cleanup(info); +err_defio: + vfree((void *)info->screen_base); +err_irq: + auok190x_power(par, 0); +err_gpio3: + gpio_free(board->gpio_nrst); +err_gpio2: + gpio_free(board->gpio_nsleep); +err_gpio1: + board->cleanup(par); +err_board: + regulator_put(par->regulator); +err_reg: + framebuffer_release(info); + + return ret; +} +EXPORT_SYMBOL_GPL(auok190x_common_probe); + +int auok190x_common_remove(struct platform_device *pdev) +{ + struct fb_info *info = platform_get_drvdata(pdev); + struct auok190xfb_par *par = info->par; + struct auok190x_board *board = par->board; + + pm_runtime_disable(info->device); + + sysfs_remove_group(&info->device->kobj, &auok190x_attr_group); + + unregister_framebuffer(info); + + fb_dealloc_cmap(&info->cmap); + + fb_deferred_io_cleanup(info); + + vfree((void *)info->screen_base); + + auok190x_power(par, 0); + + gpio_free(board->gpio_nrst); + gpio_free(board->gpio_nsleep); + + board->cleanup(par); + + regulator_put(par->regulator); + + framebuffer_release(info); + + return 0; +} +EXPORT_SYMBOL_GPL(auok190x_common_remove); + +MODULE_DESCRIPTION("Common code for AUO-K190X controllers"); +MODULE_AUTHOR("Heiko Stuebner <heiko@sntech.de>"); +MODULE_LICENSE("GPL"); |