/* * shmob_drm_drv.c -- SH Mobile DRM driver * * Copyright (C) 2012 Renesas Electronics Corporation * * Laurent Pinchart (laurent.pinchart@ideasonboard.com) * * 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; either version 2 of the License, or * (at your option) any later version. */ #include <linux/clk.h> #include <linux/io.h> #include <linux/mm.h> #include <linux/module.h> #include <linux/platform_device.h> #include <linux/pm.h> #include <linux/slab.h> #include <drm/drmP.h> #include <drm/drm_crtc_helper.h> #include <drm/drm_gem_cma_helper.h> #include "shmob_drm_crtc.h" #include "shmob_drm_drv.h" #include "shmob_drm_kms.h" #include "shmob_drm_plane.h" #include "shmob_drm_regs.h" /* ----------------------------------------------------------------------------- * Hardware initialization */ static int shmob_drm_init_interface(struct shmob_drm_device *sdev) { static const u32 ldmt1r[] = { [SHMOB_DRM_IFACE_RGB8] = LDMT1R_MIFTYP_RGB8, [SHMOB_DRM_IFACE_RGB9] = LDMT1R_MIFTYP_RGB9, [SHMOB_DRM_IFACE_RGB12A] = LDMT1R_MIFTYP_RGB12A, [SHMOB_DRM_IFACE_RGB12B] = LDMT1R_MIFTYP_RGB12B, [SHMOB_DRM_IFACE_RGB16] = LDMT1R_MIFTYP_RGB16, [SHMOB_DRM_IFACE_RGB18] = LDMT1R_MIFTYP_RGB18, [SHMOB_DRM_IFACE_RGB24] = LDMT1R_MIFTYP_RGB24, [SHMOB_DRM_IFACE_YUV422] = LDMT1R_MIFTYP_YCBCR, [SHMOB_DRM_IFACE_SYS8A] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS8A, [SHMOB_DRM_IFACE_SYS8B] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS8B, [SHMOB_DRM_IFACE_SYS8C] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS8C, [SHMOB_DRM_IFACE_SYS8D] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS8D, [SHMOB_DRM_IFACE_SYS9] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS9, [SHMOB_DRM_IFACE_SYS12] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS12, [SHMOB_DRM_IFACE_SYS16A] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS16A, [SHMOB_DRM_IFACE_SYS16B] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS16B, [SHMOB_DRM_IFACE_SYS16C] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS16C, [SHMOB_DRM_IFACE_SYS18] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS18, [SHMOB_DRM_IFACE_SYS24] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS24, }; if (sdev->pdata->iface.interface >= ARRAY_SIZE(ldmt1r)) { dev_err(sdev->dev, "invalid interface type %u\n", sdev->pdata->iface.interface); return -EINVAL; } sdev->ldmt1r = ldmt1r[sdev->pdata->iface.interface]; return 0; } static int shmob_drm_setup_clocks(struct shmob_drm_device *sdev, enum shmob_drm_clk_source clksrc) { struct clk *clk; char *clkname; switch (clksrc) { case SHMOB_DRM_CLK_BUS: clkname = "bus_clk"; sdev->lddckr = LDDCKR_ICKSEL_BUS; break; case SHMOB_DRM_CLK_PERIPHERAL: clkname = "peripheral_clk"; sdev->lddckr = LDDCKR_ICKSEL_MIPI; break; case SHMOB_DRM_CLK_EXTERNAL: clkname = NULL; sdev->lddckr = LDDCKR_ICKSEL_HDMI; break; default: return -EINVAL; } clk = devm_clk_get(sdev->dev, clkname); if (IS_ERR(clk)) { dev_err(sdev->dev, "cannot get dot clock %s\n", clkname); return PTR_ERR(clk); } sdev->clock = clk; return 0; } /* ----------------------------------------------------------------------------- * DRM operations */ static int shmob_drm_unload(struct drm_device *dev) { drm_kms_helper_poll_fini(dev); drm_mode_config_cleanup(dev); drm_vblank_cleanup(dev); drm_irq_uninstall(dev); dev->dev_private = NULL; return 0; } static int shmob_drm_load(struct drm_device *dev, unsigned long flags) { struct shmob_drm_platform_data *pdata = dev->dev->platform_data; struct platform_device *pdev = dev->platformdev; struct shmob_drm_device *sdev; struct resource *res; unsigned int i; int ret; if (pdata == NULL) { dev_err(dev->dev, "no platform data\n"); return -EINVAL; } sdev = devm_kzalloc(&pdev->dev, sizeof(*sdev), GFP_KERNEL); if (sdev == NULL) { dev_err(dev->dev, "failed to allocate private data\n"); return -ENOMEM; } sdev->dev = &pdev->dev; sdev->pdata = pdata; spin_lock_init(&sdev->irq_lock); sdev->ddev = dev; dev->dev_private = sdev; /* I/O resources and clocks */ res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (res == NULL) { dev_err(&pdev->dev, "failed to get memory resource\n"); return -EINVAL; } sdev->mmio = devm_ioremap_nocache(&pdev->dev, res->start, resource_size(res)); if (sdev->mmio == NULL) { dev_err(&pdev->dev, "failed to remap memory resource\n"); return -ENOMEM; } ret = shmob_drm_setup_clocks(sdev, pdata->clk_source); if (ret < 0) return ret; ret = shmob_drm_init_interface(sdev); if (ret < 0) return ret; ret = shmob_drm_modeset_init(sdev); if (ret < 0) { dev_err(&pdev->dev, "failed to initialize mode setting\n"); return ret; } for (i = 0; i < 4; ++i) { ret = shmob_drm_plane_create(sdev, i); if (ret < 0) { dev_err(&pdev->dev, "failed to create plane %u\n", i); goto done; } } ret = drm_vblank_init(dev, 1); if (ret < 0) { dev_err(&pdev->dev, "failed to initialize vblank\n"); goto done; } ret = drm_irq_install(dev, platform_get_irq(dev->platformdev, 0)); if (ret < 0) { dev_err(&pdev->dev, "failed to install IRQ handler\n"); goto done; } platform_set_drvdata(pdev, sdev); done: if (ret) shmob_drm_unload(dev); return ret; } static void shmob_drm_preclose(struct drm_device *dev, struct drm_file *file) { struct shmob_drm_device *sdev = dev->dev_private; shmob_drm_crtc_cancel_page_flip(&sdev->crtc, file); } static irqreturn_t shmob_drm_irq(int irq, void *arg) { struct drm_device *dev = arg; struct shmob_drm_device *sdev = dev->dev_private; unsigned long flags; u32 status; /* Acknowledge interrupts. Putting interrupt enable and interrupt flag * bits in the same register is really brain-dead design and requires * taking a spinlock. */ spin_lock_irqsave(&sdev->irq_lock, flags); status = lcdc_read(sdev, LDINTR); lcdc_write(sdev, LDINTR, status ^ LDINTR_STATUS_MASK); spin_unlock_irqrestore(&sdev->irq_lock, flags); if (status & LDINTR_VES) { drm_handle_vblank(dev, 0); shmob_drm_crtc_finish_page_flip(&sdev->crtc); } return IRQ_HANDLED; } static int shmob_drm_enable_vblank(struct drm_device *dev, unsigned int pipe) { struct shmob_drm_device *sdev = dev->dev_private; shmob_drm_crtc_enable_vblank(sdev, true); return 0; } static void shmob_drm_disable_vblank(struct drm_device *dev, unsigned int pipe) { struct shmob_drm_device *sdev = dev->dev_private; shmob_drm_crtc_enable_vblank(sdev, false); } static const struct file_operations shmob_drm_fops = { .owner = THIS_MODULE, .open = drm_open, .release = drm_release, .unlocked_ioctl = drm_ioctl, #ifdef CONFIG_COMPAT .compat_ioctl = drm_compat_ioctl, #endif .poll = drm_poll, .read = drm_read, .llseek = no_llseek, .mmap = drm_gem_cma_mmap, }; static struct drm_driver shmob_drm_driver = { .driver_features = DRIVER_HAVE_IRQ | DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME, .load = shmob_drm_load, .unload = shmob_drm_unload, .preclose = shmob_drm_preclose, .set_busid = drm_platform_set_busid, .irq_handler = shmob_drm_irq, .get_vblank_counter = drm_vblank_no_hw_counter, .enable_vblank = shmob_drm_enable_vblank, .disable_vblank = shmob_drm_disable_vblank, .gem_free_object = drm_gem_cma_free_object, .gem_vm_ops = &drm_gem_cma_vm_ops, .prime_handle_to_fd = drm_gem_prime_handle_to_fd, .prime_fd_to_handle = drm_gem_prime_fd_to_handle, .gem_prime_import = drm_gem_prime_import, .gem_prime_export = drm_gem_prime_export, .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table, .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table, .gem_prime_vmap = drm_gem_cma_prime_vmap, .gem_prime_vunmap = drm_gem_cma_prime_vunmap, .gem_prime_mmap = drm_gem_cma_prime_mmap, .dumb_create = drm_gem_cma_dumb_create, .dumb_map_offset = drm_gem_cma_dumb_map_offset, .dumb_destroy = drm_gem_dumb_destroy, .fops = &shmob_drm_fops, .name = "shmob-drm", .desc = "Renesas SH Mobile DRM", .date = "20120424", .major = 1, .minor = 0, }; /* ----------------------------------------------------------------------------- * Power management */ #ifdef CONFIG_PM_SLEEP static int shmob_drm_pm_suspend(struct device *dev) { struct shmob_drm_device *sdev = dev_get_drvdata(dev); drm_kms_helper_poll_disable(sdev->ddev); shmob_drm_crtc_suspend(&sdev->crtc); return 0; } static int shmob_drm_pm_resume(struct device *dev) { struct shmob_drm_device *sdev = dev_get_drvdata(dev); drm_modeset_lock_all(sdev->ddev); shmob_drm_crtc_resume(&sdev->crtc); drm_modeset_unlock_all(sdev->ddev); drm_kms_helper_poll_enable(sdev->ddev); return 0; } #endif static const struct dev_pm_ops shmob_drm_pm_ops = { SET_SYSTEM_SLEEP_PM_OPS(shmob_drm_pm_suspend, shmob_drm_pm_resume) }; /* ----------------------------------------------------------------------------- * Platform driver */ static int shmob_drm_probe(struct platform_device *pdev) { return drm_platform_init(&shmob_drm_driver, pdev); } static int shmob_drm_remove(struct platform_device *pdev) { struct shmob_drm_device *sdev = platform_get_drvdata(pdev); drm_put_dev(sdev->ddev); return 0; } static struct platform_driver shmob_drm_platform_driver = { .probe = shmob_drm_probe, .remove = shmob_drm_remove, .driver = { .name = "shmob-drm", .pm = &shmob_drm_pm_ops, }, }; module_platform_driver(shmob_drm_platform_driver); MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>"); MODULE_DESCRIPTION("Renesas SH Mobile DRM Driver"); MODULE_LICENSE("GPL");