diff options
Diffstat (limited to 'drivers/media/platform/davinci/vpbe.c')
| -rw-r--r-- | drivers/media/platform/davinci/vpbe.c | 868 |
1 files changed, 868 insertions, 0 deletions
diff --git a/drivers/media/platform/davinci/vpbe.c b/drivers/media/platform/davinci/vpbe.c new file mode 100644 index 00000000000..69d7a58c92c --- /dev/null +++ b/drivers/media/platform/davinci/vpbe.c @@ -0,0 +1,868 @@ +/* + * Copyright (C) 2010 Texas Instruments Inc + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation version 2. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/module.h> +#include <linux/errno.h> +#include <linux/fs.h> +#include <linux/string.h> +#include <linux/wait.h> +#include <linux/time.h> +#include <linux/platform_device.h> +#include <linux/io.h> +#include <linux/slab.h> +#include <linux/clk.h> +#include <linux/err.h> + +#include <media/v4l2-device.h> +#include <media/davinci/vpbe_types.h> +#include <media/davinci/vpbe.h> +#include <media/davinci/vpss.h> +#include <media/davinci/vpbe_venc.h> + +#define VPBE_DEFAULT_OUTPUT "Composite" +#define VPBE_DEFAULT_MODE "ntsc" + +static char *def_output = VPBE_DEFAULT_OUTPUT; +static char *def_mode = VPBE_DEFAULT_MODE; +static int debug; + +module_param(def_output, charp, S_IRUGO); +module_param(def_mode, charp, S_IRUGO); +module_param(debug, int, 0644); + +MODULE_PARM_DESC(def_output, "vpbe output name (default:Composite)"); +MODULE_PARM_DESC(def_mode, "vpbe output mode name (default:ntsc"); +MODULE_PARM_DESC(debug, "Debug level 0-1"); + +MODULE_DESCRIPTION("TI DMXXX VPBE Display controller"); +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Texas Instruments"); + +/** + * vpbe_current_encoder_info - Get config info for current encoder + * @vpbe_dev - vpbe device ptr + * + * Return ptr to current encoder config info + */ +static struct encoder_config_info* +vpbe_current_encoder_info(struct vpbe_device *vpbe_dev) +{ + struct vpbe_config *cfg = vpbe_dev->cfg; + int index = vpbe_dev->current_sd_index; + + return ((index == 0) ? &cfg->venc : + &cfg->ext_encoders[index-1]); +} + +/** + * vpbe_find_encoder_sd_index - Given a name find encoder sd index + * + * @vpbe_config - ptr to vpbe cfg + * @output_index - index used by application + * + * Return sd index of the encoder + */ +static int vpbe_find_encoder_sd_index(struct vpbe_config *cfg, + int index) +{ + char *encoder_name = cfg->outputs[index].subdev_name; + int i; + + /* Venc is always first */ + if (!strcmp(encoder_name, cfg->venc.module_name)) + return 0; + + for (i = 0; i < cfg->num_ext_encoders; i++) { + if (!strcmp(encoder_name, + cfg->ext_encoders[i].module_name)) + return i+1; + } + + return -EINVAL; +} + +/** + * vpbe_g_cropcap - Get crop capabilities of the display + * @vpbe_dev - vpbe device ptr + * @cropcap - cropcap is a ptr to struct v4l2_cropcap + * + * Update the crop capabilities in crop cap for current + * mode + */ +static int vpbe_g_cropcap(struct vpbe_device *vpbe_dev, + struct v4l2_cropcap *cropcap) +{ + if (NULL == cropcap) + return -EINVAL; + cropcap->bounds.left = 0; + cropcap->bounds.top = 0; + cropcap->bounds.width = vpbe_dev->current_timings.xres; + cropcap->bounds.height = vpbe_dev->current_timings.yres; + cropcap->defrect = cropcap->bounds; + + return 0; +} + +/** + * vpbe_enum_outputs - enumerate outputs + * @vpbe_dev - vpbe device ptr + * @output - ptr to v4l2_output structure + * + * Enumerates the outputs available at the vpbe display + * returns the status, -EINVAL if end of output list + */ +static int vpbe_enum_outputs(struct vpbe_device *vpbe_dev, + struct v4l2_output *output) +{ + struct vpbe_config *cfg = vpbe_dev->cfg; + int temp_index = output->index; + + if (temp_index >= cfg->num_outputs) + return -EINVAL; + + *output = cfg->outputs[temp_index].output; + output->index = temp_index; + + return 0; +} + +static int vpbe_get_mode_info(struct vpbe_device *vpbe_dev, char *mode, + int output_index) +{ + struct vpbe_config *cfg = vpbe_dev->cfg; + struct vpbe_enc_mode_info var; + int curr_output = output_index; + int i; + + if (NULL == mode) + return -EINVAL; + + for (i = 0; i < cfg->outputs[curr_output].num_modes; i++) { + var = cfg->outputs[curr_output].modes[i]; + if (!strcmp(mode, var.name)) { + vpbe_dev->current_timings = var; + return 0; + } + } + + return -EINVAL; +} + +static int vpbe_get_current_mode_info(struct vpbe_device *vpbe_dev, + struct vpbe_enc_mode_info *mode_info) +{ + if (NULL == mode_info) + return -EINVAL; + + *mode_info = vpbe_dev->current_timings; + + return 0; +} + +/* Get std by std id */ +static int vpbe_get_std_info(struct vpbe_device *vpbe_dev, + v4l2_std_id std_id) +{ + struct vpbe_config *cfg = vpbe_dev->cfg; + struct vpbe_enc_mode_info var; + int curr_output = vpbe_dev->current_out_index; + int i; + + for (i = 0; i < vpbe_dev->cfg->outputs[curr_output].num_modes; i++) { + var = cfg->outputs[curr_output].modes[i]; + if ((var.timings_type & VPBE_ENC_STD) && + (var.std_id & std_id)) { + vpbe_dev->current_timings = var; + return 0; + } + } + + return -EINVAL; +} + +static int vpbe_get_std_info_by_name(struct vpbe_device *vpbe_dev, + char *std_name) +{ + struct vpbe_config *cfg = vpbe_dev->cfg; + struct vpbe_enc_mode_info var; + int curr_output = vpbe_dev->current_out_index; + int i; + + for (i = 0; i < vpbe_dev->cfg->outputs[curr_output].num_modes; i++) { + var = cfg->outputs[curr_output].modes[i]; + if (!strcmp(var.name, std_name)) { + vpbe_dev->current_timings = var; + return 0; + } + } + + return -EINVAL; +} + +/** + * vpbe_set_output - Set output + * @vpbe_dev - vpbe device ptr + * @index - index of output + * + * Set vpbe output to the output specified by the index + */ +static int vpbe_set_output(struct vpbe_device *vpbe_dev, int index) +{ + struct encoder_config_info *curr_enc_info = + vpbe_current_encoder_info(vpbe_dev); + struct vpbe_config *cfg = vpbe_dev->cfg; + struct venc_platform_data *venc_device = vpbe_dev->venc_device; + enum v4l2_mbus_pixelcode if_params; + int enc_out_index; + int sd_index; + int ret = 0; + + if (index >= cfg->num_outputs) + return -EINVAL; + + mutex_lock(&vpbe_dev->lock); + + sd_index = vpbe_dev->current_sd_index; + enc_out_index = cfg->outputs[index].output.index; + /* + * Currently we switch the encoder based on output selected + * by the application. If media controller is implemented later + * there is will be an API added to setup_link between venc + * and external encoder. So in that case below comparison always + * match and encoder will not be switched. But if application + * chose not to use media controller, then this provides current + * way of switching encoder at the venc output. + */ + if (strcmp(curr_enc_info->module_name, + cfg->outputs[index].subdev_name)) { + /* Need to switch the encoder at the output */ + sd_index = vpbe_find_encoder_sd_index(cfg, index); + if (sd_index < 0) { + ret = -EINVAL; + goto out; + } + + if_params = cfg->outputs[index].if_params; + venc_device->setup_if_config(if_params); + if (ret) + goto out; + } + + /* Set output at the encoder */ + ret = v4l2_subdev_call(vpbe_dev->encoders[sd_index], video, + s_routing, 0, enc_out_index, 0); + if (ret) + goto out; + + /* + * It is assumed that venc or extenal encoder will set a default + * mode in the sub device. For external encoder or LCD pannel output, + * we also need to set up the lcd port for the required mode. So setup + * the lcd port for the default mode that is configured in the board + * arch/arm/mach-davinci/board-dm355-evm.setup file for the external + * encoder. + */ + ret = vpbe_get_mode_info(vpbe_dev, + cfg->outputs[index].default_mode, index); + if (!ret) { + struct osd_state *osd_device = vpbe_dev->osd_device; + + osd_device->ops.set_left_margin(osd_device, + vpbe_dev->current_timings.left_margin); + osd_device->ops.set_top_margin(osd_device, + vpbe_dev->current_timings.upper_margin); + vpbe_dev->current_sd_index = sd_index; + vpbe_dev->current_out_index = index; + } +out: + mutex_unlock(&vpbe_dev->lock); + return ret; +} + +static int vpbe_set_default_output(struct vpbe_device *vpbe_dev) +{ + struct vpbe_config *cfg = vpbe_dev->cfg; + int ret = 0; + int i; + + for (i = 0; i < cfg->num_outputs; i++) { + if (!strcmp(def_output, + cfg->outputs[i].output.name)) { + ret = vpbe_set_output(vpbe_dev, i); + if (!ret) + vpbe_dev->current_out_index = i; + return ret; + } + } + return ret; +} + +/** + * vpbe_get_output - Get output + * @vpbe_dev - vpbe device ptr + * + * return current vpbe output to the the index + */ +static unsigned int vpbe_get_output(struct vpbe_device *vpbe_dev) +{ + return vpbe_dev->current_out_index; +} + +/** + * vpbe_s_dv_timings - Set the given preset timings in the encoder + * + * Sets the timings if supported by the current encoder. Return the status. + * 0 - success & -EINVAL on error + */ +static int vpbe_s_dv_timings(struct vpbe_device *vpbe_dev, + struct v4l2_dv_timings *dv_timings) +{ + struct vpbe_config *cfg = vpbe_dev->cfg; + int out_index = vpbe_dev->current_out_index; + struct vpbe_output *output = &cfg->outputs[out_index]; + int sd_index = vpbe_dev->current_sd_index; + int ret, i; + + + if (!(cfg->outputs[out_index].output.capabilities & + V4L2_OUT_CAP_DV_TIMINGS)) + return -EINVAL; + + for (i = 0; i < output->num_modes; i++) { + if (output->modes[i].timings_type == VPBE_ENC_CUSTOM_TIMINGS && + !memcmp(&output->modes[i].dv_timings, + dv_timings, sizeof(*dv_timings))) + break; + } + if (i >= output->num_modes) + return -EINVAL; + vpbe_dev->current_timings = output->modes[i]; + mutex_lock(&vpbe_dev->lock); + + ret = v4l2_subdev_call(vpbe_dev->encoders[sd_index], video, + s_dv_timings, dv_timings); + if (!ret && (vpbe_dev->amp != NULL)) { + /* Call amplifier subdevice */ + ret = v4l2_subdev_call(vpbe_dev->amp, video, + s_dv_timings, dv_timings); + } + /* set the lcd controller output for the given mode */ + if (!ret) { + struct osd_state *osd_device = vpbe_dev->osd_device; + + osd_device->ops.set_left_margin(osd_device, + vpbe_dev->current_timings.left_margin); + osd_device->ops.set_top_margin(osd_device, + vpbe_dev->current_timings.upper_margin); + } + mutex_unlock(&vpbe_dev->lock); + + return ret; +} + +/** + * vpbe_g_dv_timings - Get the timings in the current encoder + * + * Get the timings in the current encoder. Return the status. 0 - success + * -EINVAL on error + */ +static int vpbe_g_dv_timings(struct vpbe_device *vpbe_dev, + struct v4l2_dv_timings *dv_timings) +{ + if (vpbe_dev->current_timings.timings_type & + VPBE_ENC_CUSTOM_TIMINGS) { + *dv_timings = vpbe_dev->current_timings.dv_timings; + return 0; + } + + return -EINVAL; +} + +/** + * vpbe_enum_dv_timings - Enumerate the dv timings in the current encoder + * + * Get the timings in the current encoder. Return the status. 0 - success + * -EINVAL on error + */ +static int vpbe_enum_dv_timings(struct vpbe_device *vpbe_dev, + struct v4l2_enum_dv_timings *timings) +{ + struct vpbe_config *cfg = vpbe_dev->cfg; + int out_index = vpbe_dev->current_out_index; + struct vpbe_output *output = &cfg->outputs[out_index]; + int j = 0; + int i; + + if (!(output->output.capabilities & V4L2_OUT_CAP_DV_TIMINGS)) + return -EINVAL; + + for (i = 0; i < output->num_modes; i++) { + if (output->modes[i].timings_type == VPBE_ENC_CUSTOM_TIMINGS) { + if (j == timings->index) + break; + j++; + } + } + + if (i == output->num_modes) + return -EINVAL; + timings->timings = output->modes[i].dv_timings; + return 0; +} + +/** + * vpbe_s_std - Set the given standard in the encoder + * + * Sets the standard if supported by the current encoder. Return the status. + * 0 - success & -EINVAL on error + */ +static int vpbe_s_std(struct vpbe_device *vpbe_dev, v4l2_std_id *std_id) +{ + struct vpbe_config *cfg = vpbe_dev->cfg; + int out_index = vpbe_dev->current_out_index; + int sd_index = vpbe_dev->current_sd_index; + int ret; + + if (!(cfg->outputs[out_index].output.capabilities & + V4L2_OUT_CAP_STD)) + return -EINVAL; + + ret = vpbe_get_std_info(vpbe_dev, *std_id); + if (ret) + return ret; + + mutex_lock(&vpbe_dev->lock); + + ret = v4l2_subdev_call(vpbe_dev->encoders[sd_index], video, + s_std_output, *std_id); + /* set the lcd controller output for the given mode */ + if (!ret) { + struct osd_state *osd_device = vpbe_dev->osd_device; + + osd_device->ops.set_left_margin(osd_device, + vpbe_dev->current_timings.left_margin); + osd_device->ops.set_top_margin(osd_device, + vpbe_dev->current_timings.upper_margin); + } + mutex_unlock(&vpbe_dev->lock); + + return ret; +} + +/** + * vpbe_g_std - Get the standard in the current encoder + * + * Get the standard in the current encoder. Return the status. 0 - success + * -EINVAL on error + */ +static int vpbe_g_std(struct vpbe_device *vpbe_dev, v4l2_std_id *std_id) +{ + struct vpbe_enc_mode_info *cur_timings = &vpbe_dev->current_timings; + + if (cur_timings->timings_type & VPBE_ENC_STD) { + *std_id = cur_timings->std_id; + return 0; + } + + return -EINVAL; +} + +/** + * vpbe_set_mode - Set mode in the current encoder using mode info + * + * Use the mode string to decide what timings to set in the encoder + * This is typically useful when fbset command is used to change the current + * timings by specifying a string to indicate the timings. + */ +static int vpbe_set_mode(struct vpbe_device *vpbe_dev, + struct vpbe_enc_mode_info *mode_info) +{ + struct vpbe_enc_mode_info *preset_mode = NULL; + struct vpbe_config *cfg = vpbe_dev->cfg; + struct v4l2_dv_timings dv_timings; + struct osd_state *osd_device; + int out_index = vpbe_dev->current_out_index; + int ret = 0; + int i; + + if ((NULL == mode_info) || (NULL == mode_info->name)) + return -EINVAL; + + for (i = 0; i < cfg->outputs[out_index].num_modes; i++) { + if (!strcmp(mode_info->name, + cfg->outputs[out_index].modes[i].name)) { + preset_mode = &cfg->outputs[out_index].modes[i]; + /* + * it may be one of the 3 timings type. Check and + * invoke right API + */ + if (preset_mode->timings_type & VPBE_ENC_STD) + return vpbe_s_std(vpbe_dev, + &preset_mode->std_id); + if (preset_mode->timings_type & + VPBE_ENC_CUSTOM_TIMINGS) { + dv_timings = + preset_mode->dv_timings; + return vpbe_s_dv_timings(vpbe_dev, &dv_timings); + } + } + } + + /* Only custom timing should reach here */ + if (preset_mode == NULL) + return -EINVAL; + + mutex_lock(&vpbe_dev->lock); + + osd_device = vpbe_dev->osd_device; + vpbe_dev->current_timings = *preset_mode; + osd_device->ops.set_left_margin(osd_device, + vpbe_dev->current_timings.left_margin); + osd_device->ops.set_top_margin(osd_device, + vpbe_dev->current_timings.upper_margin); + + mutex_unlock(&vpbe_dev->lock); + + return ret; +} + +static int vpbe_set_default_mode(struct vpbe_device *vpbe_dev) +{ + int ret; + + ret = vpbe_get_std_info_by_name(vpbe_dev, def_mode); + if (ret) + return ret; + + /* set the default mode in the encoder */ + return vpbe_set_mode(vpbe_dev, &vpbe_dev->current_timings); +} + +static int platform_device_get(struct device *dev, void *data) +{ + struct platform_device *pdev = to_platform_device(dev); + struct vpbe_device *vpbe_dev = data; + + if (strcmp("vpbe-osd", pdev->name) == 0) + vpbe_dev->osd_device = platform_get_drvdata(pdev); + if (strcmp("vpbe-venc", pdev->name) == 0) + vpbe_dev->venc_device = dev_get_platdata(&pdev->dev); + + return 0; +} + +/** + * vpbe_initialize() - Initialize the vpbe display controller + * @vpbe_dev - vpbe device ptr + * + * Master frame buffer device drivers calls this to initialize vpbe + * display controller. This will then registers v4l2 device and the sub + * devices and sets a current encoder sub device for display. v4l2 display + * device driver is the master and frame buffer display device driver is + * the slave. Frame buffer display driver checks the initialized during + * probe and exit if not initialized. Returns status. + */ +static int vpbe_initialize(struct device *dev, struct vpbe_device *vpbe_dev) +{ + struct encoder_config_info *enc_info; + struct amp_config_info *amp_info; + struct v4l2_subdev **enc_subdev; + struct osd_state *osd_device; + struct i2c_adapter *i2c_adap; + int output_index; + int num_encoders; + int ret = 0; + int err; + int i; + + /* + * v4l2 abd FBDev frame buffer devices will get the vpbe_dev pointer + * from the platform device by iteration of platform drivers and + * matching with device name + */ + if (NULL == vpbe_dev || NULL == dev) { + printk(KERN_ERR "Null device pointers.\n"); + return -ENODEV; + } + + if (vpbe_dev->initialized) + return 0; + + mutex_lock(&vpbe_dev->lock); + + if (strcmp(vpbe_dev->cfg->module_name, "dm644x-vpbe-display") != 0) { + /* We have dac clock available for platform */ + vpbe_dev->dac_clk = clk_get(vpbe_dev->pdev, "vpss_dac"); + if (IS_ERR(vpbe_dev->dac_clk)) { + ret = PTR_ERR(vpbe_dev->dac_clk); + goto fail_mutex_unlock; + } + if (clk_enable(vpbe_dev->dac_clk)) { + ret = -ENODEV; + goto fail_mutex_unlock; + } + } + + /* first enable vpss clocks */ + vpss_enable_clock(VPSS_VPBE_CLOCK, 1); + + /* First register a v4l2 device */ + ret = v4l2_device_register(dev, &vpbe_dev->v4l2_dev); + if (ret) { + v4l2_err(dev->driver, + "Unable to register v4l2 device.\n"); + goto fail_clk_put; + } + v4l2_info(&vpbe_dev->v4l2_dev, "vpbe v4l2 device registered\n"); + + err = bus_for_each_dev(&platform_bus_type, NULL, vpbe_dev, + platform_device_get); + if (err < 0) + return err; + + vpbe_dev->venc = venc_sub_dev_init(&vpbe_dev->v4l2_dev, + vpbe_dev->cfg->venc.module_name); + /* register venc sub device */ + if (vpbe_dev->venc == NULL) { + v4l2_err(&vpbe_dev->v4l2_dev, + "vpbe unable to init venc sub device\n"); + ret = -ENODEV; + goto fail_dev_unregister; + } + /* initialize osd device */ + osd_device = vpbe_dev->osd_device; + + if (NULL != osd_device->ops.initialize) { + err = osd_device->ops.initialize(osd_device); + if (err) { + v4l2_err(&vpbe_dev->v4l2_dev, + "unable to initialize the OSD device"); + err = -ENOMEM; + goto fail_dev_unregister; + } + } + + /* + * Register any external encoders that are configured. At index 0 we + * store venc sd index. + */ + num_encoders = vpbe_dev->cfg->num_ext_encoders + 1; + vpbe_dev->encoders = kmalloc( + sizeof(struct v4l2_subdev *)*num_encoders, + GFP_KERNEL); + if (NULL == vpbe_dev->encoders) { + v4l2_err(&vpbe_dev->v4l2_dev, + "unable to allocate memory for encoders sub devices"); + ret = -ENOMEM; + goto fail_dev_unregister; + } + + i2c_adap = i2c_get_adapter(vpbe_dev->cfg->i2c_adapter_id); + for (i = 0; i < (vpbe_dev->cfg->num_ext_encoders + 1); i++) { + if (i == 0) { + /* venc is at index 0 */ + enc_subdev = &vpbe_dev->encoders[i]; + *enc_subdev = vpbe_dev->venc; + continue; + } + enc_info = &vpbe_dev->cfg->ext_encoders[i]; + if (enc_info->is_i2c) { + enc_subdev = &vpbe_dev->encoders[i]; + *enc_subdev = v4l2_i2c_new_subdev_board( + &vpbe_dev->v4l2_dev, i2c_adap, + &enc_info->board_info, NULL); + if (*enc_subdev) + v4l2_info(&vpbe_dev->v4l2_dev, + "v4l2 sub device %s registered\n", + enc_info->module_name); + else { + v4l2_err(&vpbe_dev->v4l2_dev, "encoder %s" + " failed to register", + enc_info->module_name); + ret = -ENODEV; + goto fail_kfree_encoders; + } + } else + v4l2_warn(&vpbe_dev->v4l2_dev, "non-i2c encoders" + " currently not supported"); + } + /* Add amplifier subdevice for dm365 */ + if ((strcmp(vpbe_dev->cfg->module_name, "dm365-vpbe-display") == 0) && + vpbe_dev->cfg->amp != NULL) { + amp_info = vpbe_dev->cfg->amp; + if (amp_info->is_i2c) { + vpbe_dev->amp = v4l2_i2c_new_subdev_board( + &vpbe_dev->v4l2_dev, i2c_adap, + &_info->board_info, NULL); + if (!vpbe_dev->amp) { + v4l2_err(&vpbe_dev->v4l2_dev, + "amplifier %s failed to register", + amp_info->module_name); + ret = -ENODEV; + goto fail_kfree_encoders; + } + v4l2_info(&vpbe_dev->v4l2_dev, + "v4l2 sub device %s registered\n", + amp_info->module_name); + } else { + vpbe_dev->amp = NULL; + v4l2_warn(&vpbe_dev->v4l2_dev, "non-i2c amplifiers" + " currently not supported"); + } + } else { + vpbe_dev->amp = NULL; + } + + /* set the current encoder and output to that of venc by default */ + vpbe_dev->current_sd_index = 0; + vpbe_dev->current_out_index = 0; + output_index = 0; + + mutex_unlock(&vpbe_dev->lock); + + printk(KERN_NOTICE "Setting default output to %s\n", def_output); + ret = vpbe_set_default_output(vpbe_dev); + if (ret) { + v4l2_err(&vpbe_dev->v4l2_dev, "Failed to set default output %s", + def_output); + return ret; + } + + printk(KERN_NOTICE "Setting default mode to %s\n", def_mode); + ret = vpbe_set_default_mode(vpbe_dev); + if (ret) { + v4l2_err(&vpbe_dev->v4l2_dev, "Failed to set default mode %s", + def_mode); + return ret; + } + vpbe_dev->initialized = 1; + /* TBD handling of bootargs for default output and mode */ + return 0; + +fail_kfree_encoders: + kfree(vpbe_dev->encoders); +fail_dev_unregister: + v4l2_device_unregister(&vpbe_dev->v4l2_dev); +fail_clk_put: + if (strcmp(vpbe_dev->cfg->module_name, "dm644x-vpbe-display") != 0) + clk_put(vpbe_dev->dac_clk); +fail_mutex_unlock: + mutex_unlock(&vpbe_dev->lock); + return ret; +} + +/** + * vpbe_deinitialize() - de-initialize the vpbe display controller + * @dev - Master and slave device ptr + * + * vpbe_master and slave frame buffer devices calls this to de-initialize + * the display controller. It is called when master and slave device + * driver modules are removed and no longer requires the display controller. + */ +static void vpbe_deinitialize(struct device *dev, struct vpbe_device *vpbe_dev) +{ + v4l2_device_unregister(&vpbe_dev->v4l2_dev); + if (strcmp(vpbe_dev->cfg->module_name, "dm644x-vpbe-display") != 0) + clk_put(vpbe_dev->dac_clk); + + kfree(vpbe_dev->amp); + kfree(vpbe_dev->encoders); + vpbe_dev->initialized = 0; + /* disable vpss clocks */ + vpss_enable_clock(VPSS_VPBE_CLOCK, 0); +} + +static struct vpbe_device_ops vpbe_dev_ops = { + .g_cropcap = vpbe_g_cropcap, + .enum_outputs = vpbe_enum_outputs, + .set_output = vpbe_set_output, + .get_output = vpbe_get_output, + .s_dv_timings = vpbe_s_dv_timings, + .g_dv_timings = vpbe_g_dv_timings, + .enum_dv_timings = vpbe_enum_dv_timings, + .s_std = vpbe_s_std, + .g_std = vpbe_g_std, + .initialize = vpbe_initialize, + .deinitialize = vpbe_deinitialize, + .get_mode_info = vpbe_get_current_mode_info, + .set_mode = vpbe_set_mode, +}; + +static __devinit int vpbe_probe(struct platform_device *pdev) +{ + struct vpbe_device *vpbe_dev; + struct vpbe_config *cfg; + int ret = -EINVAL; + + if (pdev->dev.platform_data == NULL) { + v4l2_err(pdev->dev.driver, "No platform data\n"); + return -ENODEV; + } + cfg = pdev->dev.platform_data; + + if (!cfg->module_name[0] || + !cfg->osd.module_name[0] || + !cfg->venc.module_name[0]) { + v4l2_err(pdev->dev.driver, "vpbe display module names not" + " defined\n"); + return ret; + } + + vpbe_dev = kzalloc(sizeof(*vpbe_dev), GFP_KERNEL); + if (vpbe_dev == NULL) { + v4l2_err(pdev->dev.driver, "Unable to allocate memory" + " for vpbe_device\n"); + return -ENOMEM; + } + vpbe_dev->cfg = cfg; + vpbe_dev->ops = vpbe_dev_ops; + vpbe_dev->pdev = &pdev->dev; + + if (cfg->outputs->num_modes > 0) + vpbe_dev->current_timings = vpbe_dev->cfg->outputs[0].modes[0]; + else { + kfree(vpbe_dev); + return -ENODEV; + } + + /* set the driver data in platform device */ + platform_set_drvdata(pdev, vpbe_dev); + mutex_init(&vpbe_dev->lock); + + return 0; +} + +static int vpbe_remove(struct platform_device *device) +{ + struct vpbe_device *vpbe_dev = platform_get_drvdata(device); + + kfree(vpbe_dev); + + return 0; +} + +static struct platform_driver vpbe_driver = { + .driver = { + .name = "vpbe_controller", + .owner = THIS_MODULE, + }, + .probe = vpbe_probe, + .remove = vpbe_remove, +}; + +module_platform_driver(vpbe_driver); |