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path: root/drivers/gpu/drm/shmobile/shmob_drm_drv.c
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Diffstat (limited to 'drivers/gpu/drm/shmobile/shmob_drm_drv.c')
-rw-r--r--drivers/gpu/drm/shmobile/shmob_drm_drv.c361
1 files changed, 361 insertions, 0 deletions
diff --git a/drivers/gpu/drm/shmobile/shmob_drm_drv.c b/drivers/gpu/drm/shmobile/shmob_drm_drv.c
new file mode 100644
index 000000000000..c71d493fd0c5
--- /dev/null
+++ b/drivers/gpu/drm/shmobile/shmob_drm_drv.c
@@ -0,0 +1,361 @@
+/*
+ * shmob_drm_drv.c -- SH Mobile DRM driver
+ *
+ * Copyright (C) 2012 Renesas 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 __devinit 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 __devinit 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 = 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)
+{
+ struct shmob_drm_device *sdev = dev->dev_private;
+
+ drm_kms_helper_poll_fini(dev);
+ drm_mode_config_cleanup(dev);
+ drm_vblank_cleanup(dev);
+ drm_irq_uninstall(dev);
+
+ if (sdev->clock)
+ clk_put(sdev->clock);
+
+ if (sdev->mmio)
+ iounmap(sdev->mmio);
+
+ dev->dev_private = NULL;
+ kfree(sdev);
+
+ 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 = kzalloc(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");
+ ret = -EINVAL;
+ goto done;
+ }
+
+ sdev->mmio = ioremap_nocache(res->start, resource_size(res));
+ if (sdev->mmio == NULL) {
+ dev_err(&pdev->dev, "failed to remap memory resource\n");
+ ret = -ENOMEM;
+ goto done;
+ }
+
+ ret = shmob_drm_setup_clocks(sdev, pdata->clk_source);
+ if (ret < 0)
+ goto done;
+
+ ret = shmob_drm_init_interface(sdev);
+ if (ret < 0)
+ goto done;
+
+ ret = shmob_drm_modeset_init(sdev);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "failed to initialize mode setting\n");
+ goto done;
+ }
+
+ 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);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "failed to install IRQ handler\n");
+ goto done;
+ }
+
+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, int crtc)
+{
+ 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, int crtc)
+{
+ 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,
+ .fasync = drm_fasync,
+ .llseek = no_llseek,
+ .mmap = drm_gem_cma_mmap,
+};
+
+static struct drm_driver shmob_drm_driver = {
+ .driver_features = DRIVER_HAVE_IRQ | DRIVER_GEM | DRIVER_MODESET,
+ .load = shmob_drm_load,
+ .unload = shmob_drm_unload,
+ .preclose = shmob_drm_preclose,
+ .irq_handler = shmob_drm_irq,
+ .get_vblank_counter = drm_vblank_count,
+ .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,
+ .dumb_create = drm_gem_cma_dumb_create,
+ .dumb_map_offset = drm_gem_cma_dumb_map_offset,
+ .dumb_destroy = drm_gem_cma_dumb_destroy,
+ .fops = &shmob_drm_fops,
+ .name = "shmob-drm",
+ .desc = "Renesas SH Mobile DRM",
+ .date = "20120424",
+ .major = 1,
+ .minor = 0,
+};
+
+/* -----------------------------------------------------------------------------
+ * Power management
+ */
+
+#if CONFIG_PM_SLEEP
+static int shmob_drm_pm_suspend(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct drm_device *ddev = platform_get_drvdata(pdev);
+ struct shmob_drm_device *sdev = ddev->dev_private;
+
+ drm_kms_helper_poll_disable(ddev);
+ shmob_drm_crtc_suspend(&sdev->crtc);
+
+ return 0;
+}
+
+static int shmob_drm_pm_resume(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct drm_device *ddev = platform_get_drvdata(pdev);
+ struct shmob_drm_device *sdev = ddev->dev_private;
+
+ mutex_lock(&sdev->ddev->mode_config.mutex);
+ shmob_drm_crtc_resume(&sdev->crtc);
+ mutex_unlock(&sdev->ddev->mode_config.mutex);
+
+ 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 __devinit shmob_drm_probe(struct platform_device *pdev)
+{
+ return drm_platform_init(&shmob_drm_driver, pdev);
+}
+
+static int __devexit shmob_drm_remove(struct platform_device *pdev)
+{
+ drm_platform_exit(&shmob_drm_driver, pdev);
+
+ return 0;
+}
+
+static struct platform_driver shmob_drm_platform_driver = {
+ .probe = shmob_drm_probe,
+ .remove = __devexit_p(shmob_drm_remove),
+ .driver = {
+ .owner = THIS_MODULE,
+ .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");