diff options
Diffstat (limited to 'drivers/video/fbdev/exynos/exynos_mipi_dsi.c')
| -rw-r--r-- | drivers/video/fbdev/exynos/exynos_mipi_dsi.c | 574 |
1 files changed, 574 insertions, 0 deletions
diff --git a/drivers/video/fbdev/exynos/exynos_mipi_dsi.c b/drivers/video/fbdev/exynos/exynos_mipi_dsi.c new file mode 100644 index 000000000000..cee9602f9a7b --- /dev/null +++ b/drivers/video/fbdev/exynos/exynos_mipi_dsi.c @@ -0,0 +1,574 @@ +/* linux/drivers/video/exynos/exynos_mipi_dsi.c + * + * Samsung SoC MIPI-DSIM driver. + * + * Copyright (c) 2012 Samsung Electronics Co., Ltd + * + * InKi Dae, <inki.dae@samsung.com> + * Donghwa Lee, <dh09.lee@samsung.com> + * + * 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/errno.h> +#include <linux/clk.h> +#include <linux/mutex.h> +#include <linux/wait.h> +#include <linux/fs.h> +#include <linux/mm.h> +#include <linux/fb.h> +#include <linux/ctype.h> +#include <linux/platform_device.h> +#include <linux/io.h> +#include <linux/irq.h> +#include <linux/memory.h> +#include <linux/delay.h> +#include <linux/interrupt.h> +#include <linux/kthread.h> +#include <linux/notifier.h> +#include <linux/phy/phy.h> +#include <linux/regulator/consumer.h> +#include <linux/pm_runtime.h> +#include <linux/err.h> + +#include <video/exynos_mipi_dsim.h> + +#include "exynos_mipi_dsi_common.h" +#include "exynos_mipi_dsi_lowlevel.h" + +struct mipi_dsim_ddi { + int bus_id; + struct list_head list; + struct mipi_dsim_lcd_device *dsim_lcd_dev; + struct mipi_dsim_lcd_driver *dsim_lcd_drv; +}; + +static LIST_HEAD(dsim_ddi_list); + +static DEFINE_MUTEX(mipi_dsim_lock); + +static struct mipi_dsim_platform_data *to_dsim_plat(struct platform_device + *pdev) +{ + return pdev->dev.platform_data; +} + +static struct regulator_bulk_data supplies[] = { + { .supply = "vdd11", }, + { .supply = "vdd18", }, +}; + +static int exynos_mipi_regulator_enable(struct mipi_dsim_device *dsim) +{ + int ret; + + mutex_lock(&dsim->lock); + ret = regulator_bulk_enable(ARRAY_SIZE(supplies), supplies); + mutex_unlock(&dsim->lock); + + return ret; +} + +static int exynos_mipi_regulator_disable(struct mipi_dsim_device *dsim) +{ + int ret; + + mutex_lock(&dsim->lock); + ret = regulator_bulk_disable(ARRAY_SIZE(supplies), supplies); + mutex_unlock(&dsim->lock); + + return ret; +} + +/* update all register settings to MIPI DSI controller. */ +static void exynos_mipi_update_cfg(struct mipi_dsim_device *dsim) +{ + /* + * data from Display controller(FIMD) is not transferred in video mode + * but in case of command mode, all settings is not updated to + * registers. + */ + exynos_mipi_dsi_stand_by(dsim, 0); + + exynos_mipi_dsi_init_dsim(dsim); + exynos_mipi_dsi_init_link(dsim); + + exynos_mipi_dsi_set_hs_enable(dsim); + + /* set display timing. */ + exynos_mipi_dsi_set_display_mode(dsim, dsim->dsim_config); + + exynos_mipi_dsi_init_interrupt(dsim); + + /* + * data from Display controller(FIMD) is transferred in video mode + * but in case of command mode, all settings are updated to registers. + */ + exynos_mipi_dsi_stand_by(dsim, 1); +} + +static int exynos_mipi_dsi_early_blank_mode(struct mipi_dsim_device *dsim, + int power) +{ + struct mipi_dsim_lcd_driver *client_drv = dsim->dsim_lcd_drv; + struct mipi_dsim_lcd_device *client_dev = dsim->dsim_lcd_dev; + + switch (power) { + case FB_BLANK_POWERDOWN: + if (dsim->suspended) + return 0; + + if (client_drv && client_drv->suspend) + client_drv->suspend(client_dev); + + clk_disable(dsim->clock); + + exynos_mipi_regulator_disable(dsim); + + dsim->suspended = true; + + break; + default: + break; + } + + return 0; +} + +static int exynos_mipi_dsi_blank_mode(struct mipi_dsim_device *dsim, int power) +{ + struct mipi_dsim_lcd_driver *client_drv = dsim->dsim_lcd_drv; + struct mipi_dsim_lcd_device *client_dev = dsim->dsim_lcd_dev; + + switch (power) { + case FB_BLANK_UNBLANK: + if (!dsim->suspended) + return 0; + + /* lcd panel power on. */ + if (client_drv && client_drv->power_on) + client_drv->power_on(client_dev, 1); + + exynos_mipi_regulator_enable(dsim); + + /* enable MIPI-DSI PHY. */ + phy_power_on(dsim->phy); + + clk_enable(dsim->clock); + + exynos_mipi_update_cfg(dsim); + + /* set lcd panel sequence commands. */ + if (client_drv && client_drv->set_sequence) + client_drv->set_sequence(client_dev); + + dsim->suspended = false; + + break; + case FB_BLANK_NORMAL: + /* TODO. */ + break; + default: + break; + } + + return 0; +} + +int exynos_mipi_dsi_register_lcd_device(struct mipi_dsim_lcd_device *lcd_dev) +{ + struct mipi_dsim_ddi *dsim_ddi; + + if (!lcd_dev->name) { + pr_err("dsim_lcd_device name is NULL.\n"); + return -EFAULT; + } + + dsim_ddi = kzalloc(sizeof(struct mipi_dsim_ddi), GFP_KERNEL); + if (!dsim_ddi) { + pr_err("failed to allocate dsim_ddi object.\n"); + return -ENOMEM; + } + + dsim_ddi->dsim_lcd_dev = lcd_dev; + + mutex_lock(&mipi_dsim_lock); + list_add_tail(&dsim_ddi->list, &dsim_ddi_list); + mutex_unlock(&mipi_dsim_lock); + + return 0; +} + +static struct mipi_dsim_ddi *exynos_mipi_dsi_find_lcd_device( + struct mipi_dsim_lcd_driver *lcd_drv) +{ + struct mipi_dsim_ddi *dsim_ddi, *next; + struct mipi_dsim_lcd_device *lcd_dev; + + mutex_lock(&mipi_dsim_lock); + + list_for_each_entry_safe(dsim_ddi, next, &dsim_ddi_list, list) { + if (!dsim_ddi) + goto out; + + lcd_dev = dsim_ddi->dsim_lcd_dev; + if (!lcd_dev) + continue; + + if ((strcmp(lcd_drv->name, lcd_dev->name)) == 0) { + /** + * bus_id would be used to identify + * connected bus. + */ + dsim_ddi->bus_id = lcd_dev->bus_id; + mutex_unlock(&mipi_dsim_lock); + + return dsim_ddi; + } + + list_del(&dsim_ddi->list); + kfree(dsim_ddi); + } + +out: + mutex_unlock(&mipi_dsim_lock); + + return NULL; +} + +int exynos_mipi_dsi_register_lcd_driver(struct mipi_dsim_lcd_driver *lcd_drv) +{ + struct mipi_dsim_ddi *dsim_ddi; + + if (!lcd_drv->name) { + pr_err("dsim_lcd_driver name is NULL.\n"); + return -EFAULT; + } + + dsim_ddi = exynos_mipi_dsi_find_lcd_device(lcd_drv); + if (!dsim_ddi) { + pr_err("mipi_dsim_ddi object not found.\n"); + return -EFAULT; + } + + dsim_ddi->dsim_lcd_drv = lcd_drv; + + pr_info("registered panel driver(%s) to mipi-dsi driver.\n", + lcd_drv->name); + + return 0; + +} + +static struct mipi_dsim_ddi *exynos_mipi_dsi_bind_lcd_ddi( + struct mipi_dsim_device *dsim, + const char *name) +{ + struct mipi_dsim_ddi *dsim_ddi, *next; + struct mipi_dsim_lcd_driver *lcd_drv; + struct mipi_dsim_lcd_device *lcd_dev; + int ret; + + mutex_lock(&dsim->lock); + + list_for_each_entry_safe(dsim_ddi, next, &dsim_ddi_list, list) { + lcd_drv = dsim_ddi->dsim_lcd_drv; + lcd_dev = dsim_ddi->dsim_lcd_dev; + if (!lcd_drv || !lcd_dev || + (dsim->id != dsim_ddi->bus_id)) + continue; + + dev_dbg(dsim->dev, "lcd_drv->id = %d, lcd_dev->id = %d\n", + lcd_drv->id, lcd_dev->id); + dev_dbg(dsim->dev, "lcd_dev->bus_id = %d, dsim->id = %d\n", + lcd_dev->bus_id, dsim->id); + + if ((strcmp(lcd_drv->name, name) == 0)) { + lcd_dev->master = dsim; + + lcd_dev->dev.parent = dsim->dev; + dev_set_name(&lcd_dev->dev, "%s", lcd_drv->name); + + ret = device_register(&lcd_dev->dev); + if (ret < 0) { + dev_err(dsim->dev, + "can't register %s, status %d\n", + dev_name(&lcd_dev->dev), ret); + mutex_unlock(&dsim->lock); + + return NULL; + } + + dsim->dsim_lcd_dev = lcd_dev; + dsim->dsim_lcd_drv = lcd_drv; + + mutex_unlock(&dsim->lock); + + return dsim_ddi; + } + } + + mutex_unlock(&dsim->lock); + + return NULL; +} + +/* define MIPI-DSI Master operations. */ +static struct mipi_dsim_master_ops master_ops = { + .cmd_read = exynos_mipi_dsi_rd_data, + .cmd_write = exynos_mipi_dsi_wr_data, + .get_dsim_frame_done = exynos_mipi_dsi_get_frame_done_status, + .clear_dsim_frame_done = exynos_mipi_dsi_clear_frame_done, + .set_early_blank_mode = exynos_mipi_dsi_early_blank_mode, + .set_blank_mode = exynos_mipi_dsi_blank_mode, +}; + +static int exynos_mipi_dsi_probe(struct platform_device *pdev) +{ + struct resource *res; + struct mipi_dsim_device *dsim; + struct mipi_dsim_config *dsim_config; + struct mipi_dsim_platform_data *dsim_pd; + struct mipi_dsim_ddi *dsim_ddi; + int ret = -EINVAL; + + dsim = devm_kzalloc(&pdev->dev, sizeof(struct mipi_dsim_device), + GFP_KERNEL); + if (!dsim) { + dev_err(&pdev->dev, "failed to allocate dsim object.\n"); + return -ENOMEM; + } + + dsim->pd = to_dsim_plat(pdev); + dsim->dev = &pdev->dev; + dsim->id = pdev->id; + + /* get mipi_dsim_platform_data. */ + dsim_pd = (struct mipi_dsim_platform_data *)dsim->pd; + if (dsim_pd == NULL) { + dev_err(&pdev->dev, "failed to get platform data for dsim.\n"); + return -EINVAL; + } + /* get mipi_dsim_config. */ + dsim_config = dsim_pd->dsim_config; + if (dsim_config == NULL) { + dev_err(&pdev->dev, "failed to get dsim config data.\n"); + return -EINVAL; + } + + dsim->dsim_config = dsim_config; + dsim->master_ops = &master_ops; + + mutex_init(&dsim->lock); + + ret = devm_regulator_bulk_get(&pdev->dev, ARRAY_SIZE(supplies), + supplies); + if (ret) { + dev_err(&pdev->dev, "Failed to get regulators: %d\n", ret); + return ret; + } + + dsim->phy = devm_phy_get(&pdev->dev, "dsim"); + if (IS_ERR(dsim->phy)) + return PTR_ERR(dsim->phy); + + dsim->clock = devm_clk_get(&pdev->dev, "dsim0"); + if (IS_ERR(dsim->clock)) { + dev_err(&pdev->dev, "failed to get dsim clock source\n"); + return -ENODEV; + } + + clk_enable(dsim->clock); + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + + dsim->reg_base = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(dsim->reg_base)) { + ret = PTR_ERR(dsim->reg_base); + goto error; + } + + mutex_init(&dsim->lock); + + /* bind lcd ddi matched with panel name. */ + dsim_ddi = exynos_mipi_dsi_bind_lcd_ddi(dsim, dsim_pd->lcd_panel_name); + if (!dsim_ddi) { + dev_err(&pdev->dev, "mipi_dsim_ddi object not found.\n"); + ret = -EINVAL; + goto error; + } + + dsim->irq = platform_get_irq(pdev, 0); + if (IS_ERR_VALUE(dsim->irq)) { + dev_err(&pdev->dev, "failed to request dsim irq resource\n"); + ret = -EINVAL; + goto error; + } + + init_completion(&dsim_wr_comp); + init_completion(&dsim_rd_comp); + platform_set_drvdata(pdev, dsim); + + ret = devm_request_irq(&pdev->dev, dsim->irq, + exynos_mipi_dsi_interrupt_handler, + IRQF_SHARED, dev_name(&pdev->dev), dsim); + if (ret != 0) { + dev_err(&pdev->dev, "failed to request dsim irq\n"); + ret = -EINVAL; + goto error; + } + + /* enable interrupts */ + exynos_mipi_dsi_init_interrupt(dsim); + + /* initialize mipi-dsi client(lcd panel). */ + if (dsim_ddi->dsim_lcd_drv && dsim_ddi->dsim_lcd_drv->probe) + dsim_ddi->dsim_lcd_drv->probe(dsim_ddi->dsim_lcd_dev); + + /* in case mipi-dsi has been enabled by bootloader */ + if (dsim_pd->enabled) { + exynos_mipi_regulator_enable(dsim); + goto done; + } + + /* lcd panel power on. */ + if (dsim_ddi->dsim_lcd_drv && dsim_ddi->dsim_lcd_drv->power_on) + dsim_ddi->dsim_lcd_drv->power_on(dsim_ddi->dsim_lcd_dev, 1); + + exynos_mipi_regulator_enable(dsim); + + /* enable MIPI-DSI PHY. */ + phy_power_on(dsim->phy); + + exynos_mipi_update_cfg(dsim); + + /* set lcd panel sequence commands. */ + if (dsim_ddi->dsim_lcd_drv && dsim_ddi->dsim_lcd_drv->set_sequence) + dsim_ddi->dsim_lcd_drv->set_sequence(dsim_ddi->dsim_lcd_dev); + + dsim->suspended = false; + +done: + platform_set_drvdata(pdev, dsim); + + dev_dbg(&pdev->dev, "%s() completed successfully (%s mode)\n", __func__, + dsim_config->e_interface == DSIM_COMMAND ? "CPU" : "RGB"); + + return 0; + +error: + clk_disable(dsim->clock); + return ret; +} + +static int exynos_mipi_dsi_remove(struct platform_device *pdev) +{ + struct mipi_dsim_device *dsim = platform_get_drvdata(pdev); + struct mipi_dsim_ddi *dsim_ddi, *next; + struct mipi_dsim_lcd_driver *dsim_lcd_drv; + + clk_disable(dsim->clock); + + list_for_each_entry_safe(dsim_ddi, next, &dsim_ddi_list, list) { + if (dsim_ddi) { + if (dsim->id != dsim_ddi->bus_id) + continue; + + dsim_lcd_drv = dsim_ddi->dsim_lcd_drv; + + if (dsim_lcd_drv->remove) + dsim_lcd_drv->remove(dsim_ddi->dsim_lcd_dev); + + kfree(dsim_ddi); + } + } + + return 0; +} + +#ifdef CONFIG_PM_SLEEP +static int exynos_mipi_dsi_suspend(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct mipi_dsim_device *dsim = platform_get_drvdata(pdev); + struct mipi_dsim_lcd_driver *client_drv = dsim->dsim_lcd_drv; + struct mipi_dsim_lcd_device *client_dev = dsim->dsim_lcd_dev; + + disable_irq(dsim->irq); + + if (dsim->suspended) + return 0; + + if (client_drv && client_drv->suspend) + client_drv->suspend(client_dev); + + /* disable MIPI-DSI PHY. */ + phy_power_off(dsim->phy); + + clk_disable(dsim->clock); + + exynos_mipi_regulator_disable(dsim); + + dsim->suspended = true; + + return 0; +} + +static int exynos_mipi_dsi_resume(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct mipi_dsim_device *dsim = platform_get_drvdata(pdev); + struct mipi_dsim_lcd_driver *client_drv = dsim->dsim_lcd_drv; + struct mipi_dsim_lcd_device *client_dev = dsim->dsim_lcd_dev; + + enable_irq(dsim->irq); + + if (!dsim->suspended) + return 0; + + /* lcd panel power on. */ + if (client_drv && client_drv->power_on) + client_drv->power_on(client_dev, 1); + + exynos_mipi_regulator_enable(dsim); + + /* enable MIPI-DSI PHY. */ + phy_power_on(dsim->phy); + + clk_enable(dsim->clock); + + exynos_mipi_update_cfg(dsim); + + /* set lcd panel sequence commands. */ + if (client_drv && client_drv->set_sequence) + client_drv->set_sequence(client_dev); + + dsim->suspended = false; + + return 0; +} +#endif + +static const struct dev_pm_ops exynos_mipi_dsi_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(exynos_mipi_dsi_suspend, exynos_mipi_dsi_resume) +}; + +static struct platform_driver exynos_mipi_dsi_driver = { + .probe = exynos_mipi_dsi_probe, + .remove = exynos_mipi_dsi_remove, + .driver = { + .name = "exynos-mipi-dsim", + .owner = THIS_MODULE, + .pm = &exynos_mipi_dsi_pm_ops, + }, +}; + +module_platform_driver(exynos_mipi_dsi_driver); + +MODULE_AUTHOR("InKi Dae <inki.dae@samsung.com>"); +MODULE_DESCRIPTION("Samusung SoC MIPI-DSI driver"); +MODULE_LICENSE("GPL"); |