/*
 * Copyright 2008 Advanced Micro Devices, Inc.
 * Copyright 2008 Red Hat Inc.
 * Copyright 2009 Jerome Glisse.
 *
 * 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, sublicense,
 * 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 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 NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) 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.
 *
 * Authors: Dave Airlie
 *          Alex Deucher
 *          Jerome Glisse
 */
#include "drmP.h"
#include "radeon_reg.h"
#include "radeon.h"

/* r520,rv530,rv560,rv570,r580 depends on : */
void r100_hdp_reset(struct radeon_device *rdev);
int rv370_pcie_gart_enable(struct radeon_device *rdev);
void rv370_pcie_gart_disable(struct radeon_device *rdev);
void r420_pipes_init(struct radeon_device *rdev);
void rs600_mc_disable_clients(struct radeon_device *rdev);
void rs600_disable_vga(struct radeon_device *rdev);
int rv515_debugfs_pipes_info_init(struct radeon_device *rdev);
int rv515_debugfs_ga_info_init(struct radeon_device *rdev);

/* This files gather functions specifics to:
 * r520,rv530,rv560,rv570,r580
 *
 * Some of these functions might be used by newer ASICs.
 */
void r520_gpu_init(struct radeon_device *rdev);
int r520_mc_wait_for_idle(struct radeon_device *rdev);


/*
 * MC
 */
int r520_mc_init(struct radeon_device *rdev)
{
	uint32_t tmp;
	int r;

	if (r100_debugfs_rbbm_init(rdev)) {
		DRM_ERROR("Failed to register debugfs file for RBBM !\n");
	}
	if (rv515_debugfs_pipes_info_init(rdev)) {
		DRM_ERROR("Failed to register debugfs file for pipes !\n");
	}
	if (rv515_debugfs_ga_info_init(rdev)) {
		DRM_ERROR("Failed to register debugfs file for pipes !\n");
	}

	r520_gpu_init(rdev);
	rv370_pcie_gart_disable(rdev);

	/* Setup GPU memory space */
	rdev->mc.vram_location = 0xFFFFFFFFUL;
	rdev->mc.gtt_location = 0xFFFFFFFFUL;
	if (rdev->flags & RADEON_IS_AGP) {
		r = radeon_agp_init(rdev);
		if (r) {
			printk(KERN_WARNING "[drm] Disabling AGP\n");
			rdev->flags &= ~RADEON_IS_AGP;
			rdev->mc.gtt_size = radeon_gart_size * 1024 * 1024;
		} else {
			rdev->mc.gtt_location = rdev->mc.agp_base;
		}
	}
	r = radeon_mc_setup(rdev);
	if (r) {
		return r;
	}

	/* Program GPU memory space */
	rs600_mc_disable_clients(rdev);
	if (r520_mc_wait_for_idle(rdev)) {
		printk(KERN_WARNING "Failed to wait MC idle while "
		       "programming pipes. Bad things might happen.\n");
	}
	/* Write VRAM size in case we are limiting it */
	WREG32(RADEON_CONFIG_MEMSIZE, rdev->mc.vram_size);
	tmp = rdev->mc.vram_location + rdev->mc.vram_size - 1;
	tmp = REG_SET(R520_MC_FB_TOP, tmp >> 16);
	tmp |= REG_SET(R520_MC_FB_START, rdev->mc.vram_location >> 16);
	WREG32_MC(R520_MC_FB_LOCATION, tmp);
	WREG32(RS690_HDP_FB_LOCATION, rdev->mc.vram_location >> 16);
	WREG32(0x310, rdev->mc.vram_location);
	if (rdev->flags & RADEON_IS_AGP) {
		tmp = rdev->mc.gtt_location + rdev->mc.gtt_size - 1;
		tmp = REG_SET(R520_MC_AGP_TOP, tmp >> 16);
		tmp |= REG_SET(R520_MC_AGP_START, rdev->mc.gtt_location >> 16);
		WREG32_MC(R520_MC_AGP_LOCATION, tmp);
		WREG32_MC(R520_MC_AGP_BASE, rdev->mc.agp_base);
		WREG32_MC(R520_MC_AGP_BASE_2, 0);
	} else {
		WREG32_MC(R520_MC_AGP_LOCATION, 0x0FFFFFFF);
		WREG32_MC(R520_MC_AGP_BASE, 0);
		WREG32_MC(R520_MC_AGP_BASE_2, 0);
	}
	return 0;
}

void r520_mc_fini(struct radeon_device *rdev)
{
	rv370_pcie_gart_disable(rdev);
	radeon_gart_table_vram_free(rdev);
	radeon_gart_fini(rdev);
}


/*
 * Global GPU functions
 */
void r520_errata(struct radeon_device *rdev)
{
	rdev->pll_errata = 0;
}

int r520_mc_wait_for_idle(struct radeon_device *rdev)
{
	unsigned i;
	uint32_t tmp;

	for (i = 0; i < rdev->usec_timeout; i++) {
		/* read MC_STATUS */
		tmp = RREG32_MC(R520_MC_STATUS);
		if (tmp & R520_MC_STATUS_IDLE) {
			return 0;
		}
		DRM_UDELAY(1);
	}
	return -1;
}

void r520_gpu_init(struct radeon_device *rdev)
{
	unsigned pipe_select_current, gb_pipe_select, tmp;

	r100_hdp_reset(rdev);
	rs600_disable_vga(rdev);
	/*
	 * DST_PIPE_CONFIG		0x170C
	 * GB_TILE_CONFIG		0x4018
	 * GB_FIFO_SIZE			0x4024
	 * GB_PIPE_SELECT		0x402C
	 * GB_PIPE_SELECT2              0x4124
	 *	Z_PIPE_SHIFT			0
	 *	Z_PIPE_MASK			0x000000003
	 * GB_FIFO_SIZE2                0x4128
	 *	SC_SFIFO_SIZE_SHIFT		0
	 *	SC_SFIFO_SIZE_MASK		0x000000003
	 *	SC_MFIFO_SIZE_SHIFT		2
	 *	SC_MFIFO_SIZE_MASK		0x00000000C
	 *	FG_SFIFO_SIZE_SHIFT		4
	 *	FG_SFIFO_SIZE_MASK		0x000000030
	 *	ZB_MFIFO_SIZE_SHIFT		6
	 *	ZB_MFIFO_SIZE_MASK		0x0000000C0
	 * GA_ENHANCE			0x4274
	 * SU_REG_DEST			0x42C8
	 */
	/* workaround for RV530 */
	if (rdev->family == CHIP_RV530) {
		WREG32(0x4124, 1);
		WREG32(0x4128, 0xFF);
	}
	r420_pipes_init(rdev);
	gb_pipe_select = RREG32(0x402C);
	tmp = RREG32(0x170C);
	pipe_select_current = (tmp >> 2) & 3;
	tmp = (1 << pipe_select_current) |
	      (((gb_pipe_select >> 8) & 0xF) << 4);
	WREG32_PLL(0x000D, tmp);
	if (r520_mc_wait_for_idle(rdev)) {
		printk(KERN_WARNING "Failed to wait MC idle while "
		       "programming pipes. Bad things might happen.\n");
	}
}


/*
 * VRAM info
 */
static void r520_vram_get_type(struct radeon_device *rdev)
{
	uint32_t tmp;

	rdev->mc.vram_width = 128;
	rdev->mc.vram_is_ddr = true;
	tmp = RREG32_MC(R520_MC_CNTL0);
	switch ((tmp & R520_MEM_NUM_CHANNELS_MASK) >> R520_MEM_NUM_CHANNELS_SHIFT) {
	case 0:
		rdev->mc.vram_width = 32;
		break;
	case 1:
		rdev->mc.vram_width = 64;
		break;
	case 2:
		rdev->mc.vram_width = 128;
		break;
	case 3:
		rdev->mc.vram_width = 256;
		break;
	default:
		rdev->mc.vram_width = 128;
		break;
	}
	if (tmp & R520_MC_CHANNEL_SIZE)
		rdev->mc.vram_width *= 2;
}

void r520_vram_info(struct radeon_device *rdev)
{
	r520_vram_get_type(rdev);
	rdev->mc.vram_size = RREG32(RADEON_CONFIG_MEMSIZE);

	rdev->mc.aper_base = drm_get_resource_start(rdev->ddev, 0);
	rdev->mc.aper_size = drm_get_resource_len(rdev->ddev, 0);
}