diff options
author | Tomi Valkeinen <tomi.valkeinen@ti.com> | 2014-02-13 17:31:38 +0400 |
---|---|---|
committer | Tomi Valkeinen <tomi.valkeinen@ti.com> | 2014-04-17 09:10:19 +0400 |
commit | f7018c21350204c4cf628462f229d44d03545254 (patch) | |
tree | 408787177164cf51cc06f7aabdb04fcff8d2b6aa /drivers/video/pxa3xx-gcu.c | |
parent | c26ef3eb3c11274bad1b64498d0a134f85755250 (diff) | |
download | linux-f7018c21350204c4cf628462f229d44d03545254.tar.xz |
video: move fbdev to drivers/video/fbdev
The drivers/video directory is a mess. It contains generic video related
files, directories for backlight, console, linux logo, lots of fbdev
device drivers, fbdev framework files.
Make some order into the chaos by creating drivers/video/fbdev
directory, and move all fbdev related files there.
No functionality is changed, although I guess it is possible that some
subtle Makefile build order related issue could be created by this
patch.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Rob Clark <robdclark@gmail.com>
Acked-by: Jingoo Han <jg1.han@samsung.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/video/pxa3xx-gcu.c')
-rw-r--r-- | drivers/video/pxa3xx-gcu.c | 724 |
1 files changed, 0 insertions, 724 deletions
diff --git a/drivers/video/pxa3xx-gcu.c b/drivers/video/pxa3xx-gcu.c deleted file mode 100644 index 417f9a27eb7d..000000000000 --- a/drivers/video/pxa3xx-gcu.c +++ /dev/null @@ -1,724 +0,0 @@ -/* - * pxa3xx-gcu.c - Linux kernel module for PXA3xx graphics controllers - * - * This driver needs a DirectFB counterpart in user space, communication - * is handled via mmap()ed memory areas and an ioctl. - * - * Copyright (c) 2009 Daniel Mack <daniel@caiaq.de> - * Copyright (c) 2009 Janine Kropp <nin@directfb.org> - * Copyright (c) 2009 Denis Oliver Kropp <dok@directfb.org> - * - * 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. - * - * 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., 675 Mass Ave, Cambridge, MA 02139, USA. - */ - -/* - * WARNING: This controller is attached to System Bus 2 of the PXA which - * needs its arbiter to be enabled explicitly (CKENB & 1<<9). - * There is currently no way to do this from Linux, so you need to teach - * your bootloader for now. - */ - -#include <linux/module.h> -#include <linux/platform_device.h> -#include <linux/dma-mapping.h> -#include <linux/miscdevice.h> -#include <linux/interrupt.h> -#include <linux/spinlock.h> -#include <linux/uaccess.h> -#include <linux/ioctl.h> -#include <linux/delay.h> -#include <linux/sched.h> -#include <linux/slab.h> -#include <linux/clk.h> -#include <linux/fs.h> -#include <linux/io.h> - -#include "pxa3xx-gcu.h" - -#define DRV_NAME "pxa3xx-gcu" -#define MISCDEV_MINOR 197 - -#define REG_GCCR 0x00 -#define GCCR_SYNC_CLR (1 << 9) -#define GCCR_BP_RST (1 << 8) -#define GCCR_ABORT (1 << 6) -#define GCCR_STOP (1 << 4) - -#define REG_GCISCR 0x04 -#define REG_GCIECR 0x08 -#define REG_GCRBBR 0x20 -#define REG_GCRBLR 0x24 -#define REG_GCRBHR 0x28 -#define REG_GCRBTR 0x2C -#define REG_GCRBEXHR 0x30 - -#define IE_EOB (1 << 0) -#define IE_EEOB (1 << 5) -#define IE_ALL 0xff - -#define SHARED_SIZE PAGE_ALIGN(sizeof(struct pxa3xx_gcu_shared)) - -/* #define PXA3XX_GCU_DEBUG */ -/* #define PXA3XX_GCU_DEBUG_TIMER */ - -#ifdef PXA3XX_GCU_DEBUG -#define QDUMP(msg) \ - do { \ - QPRINT(priv, KERN_DEBUG, msg); \ - } while (0) -#else -#define QDUMP(msg) do {} while (0) -#endif - -#define QERROR(msg) \ - do { \ - QPRINT(priv, KERN_ERR, msg); \ - } while (0) - -struct pxa3xx_gcu_batch { - struct pxa3xx_gcu_batch *next; - u32 *ptr; - dma_addr_t phys; - unsigned long length; -}; - -struct pxa3xx_gcu_priv { - void __iomem *mmio_base; - struct clk *clk; - struct pxa3xx_gcu_shared *shared; - dma_addr_t shared_phys; - struct resource *resource_mem; - struct miscdevice misc_dev; - wait_queue_head_t wait_idle; - wait_queue_head_t wait_free; - spinlock_t spinlock; - struct timeval base_time; - - struct pxa3xx_gcu_batch *free; - struct pxa3xx_gcu_batch *ready; - struct pxa3xx_gcu_batch *ready_last; - struct pxa3xx_gcu_batch *running; -}; - -static inline unsigned long -gc_readl(struct pxa3xx_gcu_priv *priv, unsigned int off) -{ - return __raw_readl(priv->mmio_base + off); -} - -static inline void -gc_writel(struct pxa3xx_gcu_priv *priv, unsigned int off, unsigned long val) -{ - __raw_writel(val, priv->mmio_base + off); -} - -#define QPRINT(priv, level, msg) \ - do { \ - struct timeval tv; \ - struct pxa3xx_gcu_shared *shared = priv->shared; \ - u32 base = gc_readl(priv, REG_GCRBBR); \ - \ - do_gettimeofday(&tv); \ - \ - printk(level "%ld.%03ld.%03ld - %-17s: %-21s (%s, " \ - "STATUS " \ - "0x%02lx, B 0x%08lx [%ld], E %5ld, H %5ld, " \ - "T %5ld)\n", \ - tv.tv_sec - priv->base_time.tv_sec, \ - tv.tv_usec / 1000, tv.tv_usec % 1000, \ - __func__, msg, \ - shared->hw_running ? "running" : " idle", \ - gc_readl(priv, REG_GCISCR), \ - gc_readl(priv, REG_GCRBBR), \ - gc_readl(priv, REG_GCRBLR), \ - (gc_readl(priv, REG_GCRBEXHR) - base) / 4, \ - (gc_readl(priv, REG_GCRBHR) - base) / 4, \ - (gc_readl(priv, REG_GCRBTR) - base) / 4); \ - } while (0) - -static void -pxa3xx_gcu_reset(struct pxa3xx_gcu_priv *priv) -{ - QDUMP("RESET"); - - /* disable interrupts */ - gc_writel(priv, REG_GCIECR, 0); - - /* reset hardware */ - gc_writel(priv, REG_GCCR, GCCR_ABORT); - gc_writel(priv, REG_GCCR, 0); - - memset(priv->shared, 0, SHARED_SIZE); - priv->shared->buffer_phys = priv->shared_phys; - priv->shared->magic = PXA3XX_GCU_SHARED_MAGIC; - - do_gettimeofday(&priv->base_time); - - /* set up the ring buffer pointers */ - gc_writel(priv, REG_GCRBLR, 0); - gc_writel(priv, REG_GCRBBR, priv->shared_phys); - gc_writel(priv, REG_GCRBTR, priv->shared_phys); - - /* enable all IRQs except EOB */ - gc_writel(priv, REG_GCIECR, IE_ALL & ~IE_EOB); -} - -static void -dump_whole_state(struct pxa3xx_gcu_priv *priv) -{ - struct pxa3xx_gcu_shared *sh = priv->shared; - u32 base = gc_readl(priv, REG_GCRBBR); - - QDUMP("DUMP"); - - printk(KERN_DEBUG "== PXA3XX-GCU DUMP ==\n" - "%s, STATUS 0x%02lx, B 0x%08lx [%ld], E %5ld, H %5ld, T %5ld\n", - sh->hw_running ? "running" : "idle ", - gc_readl(priv, REG_GCISCR), - gc_readl(priv, REG_GCRBBR), - gc_readl(priv, REG_GCRBLR), - (gc_readl(priv, REG_GCRBEXHR) - base) / 4, - (gc_readl(priv, REG_GCRBHR) - base) / 4, - (gc_readl(priv, REG_GCRBTR) - base) / 4); -} - -static void -flush_running(struct pxa3xx_gcu_priv *priv) -{ - struct pxa3xx_gcu_batch *running = priv->running; - struct pxa3xx_gcu_batch *next; - - while (running) { - next = running->next; - running->next = priv->free; - priv->free = running; - running = next; - } - - priv->running = NULL; -} - -static void -run_ready(struct pxa3xx_gcu_priv *priv) -{ - unsigned int num = 0; - struct pxa3xx_gcu_shared *shared = priv->shared; - struct pxa3xx_gcu_batch *ready = priv->ready; - - QDUMP("Start"); - - BUG_ON(!ready); - - shared->buffer[num++] = 0x05000000; - - while (ready) { - shared->buffer[num++] = 0x00000001; - shared->buffer[num++] = ready->phys; - ready = ready->next; - } - - shared->buffer[num++] = 0x05000000; - priv->running = priv->ready; - priv->ready = priv->ready_last = NULL; - gc_writel(priv, REG_GCRBLR, 0); - shared->hw_running = 1; - - /* ring base address */ - gc_writel(priv, REG_GCRBBR, shared->buffer_phys); - - /* ring tail address */ - gc_writel(priv, REG_GCRBTR, shared->buffer_phys + num * 4); - - /* ring length */ - gc_writel(priv, REG_GCRBLR, ((num + 63) & ~63) * 4); -} - -static irqreturn_t -pxa3xx_gcu_handle_irq(int irq, void *ctx) -{ - struct pxa3xx_gcu_priv *priv = ctx; - struct pxa3xx_gcu_shared *shared = priv->shared; - u32 status = gc_readl(priv, REG_GCISCR) & IE_ALL; - - QDUMP("-Interrupt"); - - if (!status) - return IRQ_NONE; - - spin_lock(&priv->spinlock); - shared->num_interrupts++; - - if (status & IE_EEOB) { - QDUMP(" [EEOB]"); - - flush_running(priv); - wake_up_all(&priv->wait_free); - - if (priv->ready) { - run_ready(priv); - } else { - /* There is no more data prepared by the userspace. - * Set hw_running = 0 and wait for the next userspace - * kick-off */ - shared->num_idle++; - shared->hw_running = 0; - - QDUMP(" '-> Idle."); - - /* set ring buffer length to zero */ - gc_writel(priv, REG_GCRBLR, 0); - - wake_up_all(&priv->wait_idle); - } - - shared->num_done++; - } else { - QERROR(" [???]"); - dump_whole_state(priv); - } - - /* Clear the interrupt */ - gc_writel(priv, REG_GCISCR, status); - spin_unlock(&priv->spinlock); - - return IRQ_HANDLED; -} - -static int -pxa3xx_gcu_wait_idle(struct pxa3xx_gcu_priv *priv) -{ - int ret = 0; - - QDUMP("Waiting for idle..."); - - /* Does not need to be atomic. There's a lock in user space, - * but anyhow, this is just for statistics. */ - priv->shared->num_wait_idle++; - - while (priv->shared->hw_running) { - int num = priv->shared->num_interrupts; - u32 rbexhr = gc_readl(priv, REG_GCRBEXHR); - - ret = wait_event_interruptible_timeout(priv->wait_idle, - !priv->shared->hw_running, HZ*4); - - if (ret != 0) - break; - - if (gc_readl(priv, REG_GCRBEXHR) == rbexhr && - priv->shared->num_interrupts == num) { - QERROR("TIMEOUT"); - ret = -ETIMEDOUT; - break; - } - } - - QDUMP("done"); - - return ret; -} - -static int -pxa3xx_gcu_wait_free(struct pxa3xx_gcu_priv *priv) -{ - int ret = 0; - - QDUMP("Waiting for free..."); - - /* Does not need to be atomic. There's a lock in user space, - * but anyhow, this is just for statistics. */ - priv->shared->num_wait_free++; - - while (!priv->free) { - u32 rbexhr = gc_readl(priv, REG_GCRBEXHR); - - ret = wait_event_interruptible_timeout(priv->wait_free, - priv->free, HZ*4); - - if (ret < 0) - break; - - if (ret > 0) - continue; - - if (gc_readl(priv, REG_GCRBEXHR) == rbexhr) { - QERROR("TIMEOUT"); - ret = -ETIMEDOUT; - break; - } - } - - QDUMP("done"); - - return ret; -} - -/* Misc device layer */ - -static inline struct pxa3xx_gcu_priv *to_pxa3xx_gcu_priv(struct file *file) -{ - struct miscdevice *dev = file->private_data; - return container_of(dev, struct pxa3xx_gcu_priv, misc_dev); -} - -/* - * provide an empty .open callback, so the core sets file->private_data - * for us. - */ -static int pxa3xx_gcu_open(struct inode *inode, struct file *file) -{ - return 0; -} - -static ssize_t -pxa3xx_gcu_write(struct file *file, const char *buff, - size_t count, loff_t *offp) -{ - int ret; - unsigned long flags; - struct pxa3xx_gcu_batch *buffer; - struct pxa3xx_gcu_priv *priv = to_pxa3xx_gcu_priv(file); - - int words = count / 4; - - /* Does not need to be atomic. There's a lock in user space, - * but anyhow, this is just for statistics. */ - priv->shared->num_writes++; - priv->shared->num_words += words; - - /* Last word reserved for batch buffer end command */ - if (words >= PXA3XX_GCU_BATCH_WORDS) - return -E2BIG; - - /* Wait for a free buffer */ - if (!priv->free) { - ret = pxa3xx_gcu_wait_free(priv); - if (ret < 0) - return ret; - } - - /* - * Get buffer from free list - */ - spin_lock_irqsave(&priv->spinlock, flags); - buffer = priv->free; - priv->free = buffer->next; - spin_unlock_irqrestore(&priv->spinlock, flags); - - - /* Copy data from user into buffer */ - ret = copy_from_user(buffer->ptr, buff, words * 4); - if (ret) { - spin_lock_irqsave(&priv->spinlock, flags); - buffer->next = priv->free; - priv->free = buffer; - spin_unlock_irqrestore(&priv->spinlock, flags); - return -EFAULT; - } - - buffer->length = words; - - /* Append batch buffer end command */ - buffer->ptr[words] = 0x01000000; - - /* - * Add buffer to ready list - */ - spin_lock_irqsave(&priv->spinlock, flags); - - buffer->next = NULL; - - if (priv->ready) { - BUG_ON(priv->ready_last == NULL); - - priv->ready_last->next = buffer; - } else - priv->ready = buffer; - - priv->ready_last = buffer; - - if (!priv->shared->hw_running) - run_ready(priv); - - spin_unlock_irqrestore(&priv->spinlock, flags); - - return words * 4; -} - - -static long -pxa3xx_gcu_ioctl(struct file *file, unsigned int cmd, unsigned long arg) -{ - unsigned long flags; - struct pxa3xx_gcu_priv *priv = to_pxa3xx_gcu_priv(file); - - switch (cmd) { - case PXA3XX_GCU_IOCTL_RESET: - spin_lock_irqsave(&priv->spinlock, flags); - pxa3xx_gcu_reset(priv); - spin_unlock_irqrestore(&priv->spinlock, flags); - return 0; - - case PXA3XX_GCU_IOCTL_WAIT_IDLE: - return pxa3xx_gcu_wait_idle(priv); - } - - return -ENOSYS; -} - -static int -pxa3xx_gcu_mmap(struct file *file, struct vm_area_struct *vma) -{ - unsigned int size = vma->vm_end - vma->vm_start; - struct pxa3xx_gcu_priv *priv = to_pxa3xx_gcu_priv(file); - - switch (vma->vm_pgoff) { - case 0: - /* hand out the shared data area */ - if (size != SHARED_SIZE) - return -EINVAL; - - return dma_mmap_coherent(NULL, vma, - priv->shared, priv->shared_phys, size); - - case SHARED_SIZE >> PAGE_SHIFT: - /* hand out the MMIO base for direct register access - * from userspace */ - if (size != resource_size(priv->resource_mem)) - return -EINVAL; - - vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); - - return io_remap_pfn_range(vma, vma->vm_start, - priv->resource_mem->start >> PAGE_SHIFT, - size, vma->vm_page_prot); - } - - return -EINVAL; -} - - -#ifdef PXA3XX_GCU_DEBUG_TIMER -static struct timer_list pxa3xx_gcu_debug_timer; - -static void pxa3xx_gcu_debug_timedout(unsigned long ptr) -{ - struct pxa3xx_gcu_priv *priv = (struct pxa3xx_gcu_priv *) ptr; - - QERROR("Timer DUMP"); - - /* init the timer structure */ - init_timer(&pxa3xx_gcu_debug_timer); - pxa3xx_gcu_debug_timer.function = pxa3xx_gcu_debug_timedout; - pxa3xx_gcu_debug_timer.data = ptr; - pxa3xx_gcu_debug_timer.expires = jiffies + 5*HZ; /* one second */ - - add_timer(&pxa3xx_gcu_debug_timer); -} - -static void pxa3xx_gcu_init_debug_timer(void) -{ - pxa3xx_gcu_debug_timedout((unsigned long) &pxa3xx_gcu_debug_timer); -} -#else -static inline void pxa3xx_gcu_init_debug_timer(void) {} -#endif - -static int -pxa3xx_gcu_add_buffer(struct device *dev, - struct pxa3xx_gcu_priv *priv) -{ - struct pxa3xx_gcu_batch *buffer; - - buffer = kzalloc(sizeof(struct pxa3xx_gcu_batch), GFP_KERNEL); - if (!buffer) - return -ENOMEM; - - buffer->ptr = dma_alloc_coherent(dev, PXA3XX_GCU_BATCH_WORDS * 4, - &buffer->phys, GFP_KERNEL); - if (!buffer->ptr) { - kfree(buffer); - return -ENOMEM; - } - - buffer->next = priv->free; - priv->free = buffer; - - return 0; -} - -static void -pxa3xx_gcu_free_buffers(struct device *dev, - struct pxa3xx_gcu_priv *priv) -{ - struct pxa3xx_gcu_batch *next, *buffer = priv->free; - - while (buffer) { - next = buffer->next; - - dma_free_coherent(dev, PXA3XX_GCU_BATCH_WORDS * 4, - buffer->ptr, buffer->phys); - - kfree(buffer); - buffer = next; - } - - priv->free = NULL; -} - -static const struct file_operations pxa3xx_gcu_miscdev_fops = { - .owner = THIS_MODULE, - .open = pxa3xx_gcu_open, - .write = pxa3xx_gcu_write, - .unlocked_ioctl = pxa3xx_gcu_ioctl, - .mmap = pxa3xx_gcu_mmap, -}; - -static int pxa3xx_gcu_probe(struct platform_device *pdev) -{ - int i, ret, irq; - struct resource *r; - struct pxa3xx_gcu_priv *priv; - struct device *dev = &pdev->dev; - - priv = devm_kzalloc(dev, sizeof(struct pxa3xx_gcu_priv), GFP_KERNEL); - if (!priv) - return -ENOMEM; - - init_waitqueue_head(&priv->wait_idle); - init_waitqueue_head(&priv->wait_free); - spin_lock_init(&priv->spinlock); - - /* we allocate the misc device structure as part of our own allocation, - * so we can get a pointer to our priv structure later on with - * container_of(). This isn't really necessary as we have a fixed minor - * number anyway, but this is to avoid statics. */ - - priv->misc_dev.minor = MISCDEV_MINOR, - priv->misc_dev.name = DRV_NAME, - priv->misc_dev.fops = &pxa3xx_gcu_miscdev_fops; - - /* handle IO resources */ - r = platform_get_resource(pdev, IORESOURCE_MEM, 0); - priv->mmio_base = devm_request_and_ioremap(dev, r); - if (IS_ERR(priv->mmio_base)) { - dev_err(dev, "failed to map I/O memory\n"); - return PTR_ERR(priv->mmio_base); - } - - /* enable the clock */ - priv->clk = devm_clk_get(dev, NULL); - if (IS_ERR(priv->clk)) { - dev_err(dev, "failed to get clock\n"); - return PTR_ERR(priv->clk); - } - - /* request the IRQ */ - irq = platform_get_irq(pdev, 0); - if (irq < 0) { - dev_err(dev, "no IRQ defined\n"); - return -ENODEV; - } - - ret = devm_request_irq(dev, irq, pxa3xx_gcu_handle_irq, - 0, DRV_NAME, priv); - if (ret < 0) { - dev_err(dev, "request_irq failed\n"); - return ret; - } - - /* allocate dma memory */ - priv->shared = dma_alloc_coherent(dev, SHARED_SIZE, - &priv->shared_phys, GFP_KERNEL); - if (!priv->shared) { - dev_err(dev, "failed to allocate DMA memory\n"); - return -ENOMEM; - } - - /* register misc device */ - ret = misc_register(&priv->misc_dev); - if (ret < 0) { - dev_err(dev, "misc_register() for minor %d failed\n", - MISCDEV_MINOR); - goto err_free_dma; - } - - ret = clk_enable(priv->clk); - if (ret < 0) { - dev_err(dev, "failed to enable clock\n"); - goto err_misc_deregister; - } - - for (i = 0; i < 8; i++) { - ret = pxa3xx_gcu_add_buffer(dev, priv); - if (ret) { - dev_err(dev, "failed to allocate DMA memory\n"); - goto err_disable_clk; - } - } - - platform_set_drvdata(pdev, priv); - priv->resource_mem = r; - pxa3xx_gcu_reset(priv); - pxa3xx_gcu_init_debug_timer(); - - dev_info(dev, "registered @0x%p, DMA 0x%p (%d bytes), IRQ %d\n", - (void *) r->start, (void *) priv->shared_phys, - SHARED_SIZE, irq); - return 0; - -err_free_dma: - dma_free_coherent(dev, SHARED_SIZE, - priv->shared, priv->shared_phys); - -err_misc_deregister: - misc_deregister(&priv->misc_dev); - -err_disable_clk: - clk_disable(priv->clk); - - return ret; -} - -static int pxa3xx_gcu_remove(struct platform_device *pdev) -{ - struct pxa3xx_gcu_priv *priv = platform_get_drvdata(pdev); - struct device *dev = &pdev->dev; - - pxa3xx_gcu_wait_idle(priv); - misc_deregister(&priv->misc_dev); - dma_free_coherent(dev, SHARED_SIZE, priv->shared, priv->shared_phys); - pxa3xx_gcu_free_buffers(dev, priv); - - return 0; -} - -static struct platform_driver pxa3xx_gcu_driver = { - .probe = pxa3xx_gcu_probe, - .remove = pxa3xx_gcu_remove, - .driver = { - .owner = THIS_MODULE, - .name = DRV_NAME, - }, -}; - -module_platform_driver(pxa3xx_gcu_driver); - -MODULE_DESCRIPTION("PXA3xx graphics controller unit driver"); -MODULE_LICENSE("GPL"); -MODULE_ALIAS_MISCDEV(MISCDEV_MINOR); -MODULE_AUTHOR("Janine Kropp <nin@directfb.org>, " - "Denis Oliver Kropp <dok@directfb.org>, " - "Daniel Mack <daniel@caiaq.de>"); |