drm: Add via unichrome support

Add DRM device driver for VIA Unichrome chipsets

From: Unichrome Project http://unichrome.sf.net, Erdi Chen, Thomas Hellstrom    Signed-off-by: Dave Airlie <airlied@linux.ie>

1 files changed, 118 insertions, 0 deletions

diff --git a/drivers/char/drm/via_drv.h b/drivers/char/drm/via_drv.h
new file mode 100644
index 000000000000..4eaa8b7c4c96
--- /dev/null
+++ b/drivers/char/drm/via_drv.h
@@ -0,0 +1,118 @@
+/*
+ * Copyright 1998-2003 VIA Technologies, Inc. All Rights Reserved.
+ * Copyright 2001-2003 S3 Graphics, Inc. All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sub license,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
+ * VIA, S3 GRAPHICS, AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+#ifndef _VIA_DRV_H_
+#define _VIA_DRV_H_
+
+#define DRIVER_AUTHOR   "VIA"
+
+#define DRIVER_NAME             "via"
+#define DRIVER_DESC             "VIA Unichrome / Pro"
+#define DRIVER_DATE             "20050523"
+
+#define DRIVER_MAJOR            2
+#define DRIVER_MINOR            6
+#define DRIVER_PATCHLEVEL       3
+
+#include "via_verifier.h"
+
+#define VIA_PCI_BUF_SIZE 60000
+#define VIA_FIRE_BUF_SIZE  1024
+#define VIA_NUM_IRQS 2
+
+
+
+typedef struct drm_via_ring_buffer {
+        drm_map_t map;
+        char *virtual_start;
+} drm_via_ring_buffer_t;
+
+typedef uint32_t maskarray_t[5];
+
+typedef struct drm_via_irq {
+        atomic_t irq_received;
+        uint32_t pending_mask;
+        uint32_t enable_mask;
+        wait_queue_head_t irq_queue;
+} drm_via_irq_t;
+        
+typedef struct drm_via_private {
+        drm_via_sarea_t *sarea_priv;
+        drm_map_t *sarea;
+        drm_map_t *fb;
+        drm_map_t *mmio;
+        unsigned long agpAddr;
+        wait_queue_head_t decoder_queue[VIA_NR_XVMC_LOCKS];
+        char *dma_ptr;
+        unsigned int dma_low;
+        unsigned int dma_high;
+        unsigned int dma_offset;
+        uint32_t dma_wrap;
+        volatile uint32_t *last_pause_ptr;
+        volatile uint32_t *hw_addr_ptr;
+        drm_via_ring_buffer_t ring;
+        struct timeval last_vblank;
+        int last_vblank_valid;
+        unsigned usec_per_vblank;
+        drm_via_state_t hc_state;
+        char pci_buf[VIA_PCI_BUF_SIZE];
+        const uint32_t *fire_offsets[VIA_FIRE_BUF_SIZE];
+        uint32_t num_fire_offsets;
+        int pro_group_a;
+        drm_via_irq_t via_irqs[VIA_NUM_IRQS];
+        unsigned num_irqs;
+        maskarray_t *irq_masks;
+        uint32_t irq_enable_mask; 
+        uint32_t irq_pending_mask;      
+} drm_via_private_t;
+
+/* VIA MMIO register access */
+#define VIA_BASE ((dev_priv->mmio))
+
+#define VIA_READ(reg)           DRM_READ32(VIA_BASE, reg)
+#define VIA_WRITE(reg,val)      DRM_WRITE32(VIA_BASE, reg, val)
+#define VIA_READ8(reg)          DRM_READ8(VIA_BASE, reg)
+#define VIA_WRITE8(reg,val)     DRM_WRITE8(VIA_BASE, reg, val)
+
+extern int via_init_context(drm_device_t * dev, int context);
+extern int via_final_context(drm_device_t * dev, int context);
+
+extern int via_do_cleanup_map(drm_device_t * dev);
+extern int via_map_init(struct inode *inode, struct file *filp,
+                        unsigned int cmd, unsigned long arg);
+extern int via_driver_vblank_wait(drm_device_t * dev, unsigned int *sequence);
+
+extern irqreturn_t via_driver_irq_handler(DRM_IRQ_ARGS);
+extern void via_driver_irq_preinstall(drm_device_t * dev);
+extern void via_driver_irq_postinstall(drm_device_t * dev);
+extern void via_driver_irq_uninstall(drm_device_t * dev);
+
+extern int via_dma_cleanup(drm_device_t * dev);
+extern void via_init_command_verifier(void);
+extern int via_driver_dma_quiescent(drm_device_t * dev);
+extern void via_init_futex(drm_via_private_t *dev_priv);
+extern void via_cleanup_futex(drm_via_private_t *dev_priv);
+extern void via_release_futex(drm_via_private_t *dev_priv, int context);
+
+
+#endif