/*
 * 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.h"
#include "atom.h"
#include "r520d.h"

/* This files gather functions specifics to: r520,rv530,rv560,rv570,r580 */

static 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;
}

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

        r100_hdp_reset(rdev);
        rv515_vga_render_disable(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(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");
        }
}

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)
{
        fixed20_12 a;

        r520_vram_get_type(rdev);

        r100_vram_init_sizes(rdev);
        /* FIXME: we should enforce default clock in case GPU is not in
         * default setup
         */
        a.full = rfixed_const(100);
        rdev->pm.sclk.full = rfixed_const(rdev->clock.default_sclk);
        rdev->pm.sclk.full = rfixed_div(rdev->pm.sclk, a);
}

void r520_mc_program(struct radeon_device *rdev)
{
        struct rv515_mc_save save;

        /* Stops all mc clients */
        rv515_mc_stop(rdev, &save);

        /* Wait for mc idle */
        if (r520_mc_wait_for_idle(rdev))
                dev_warn(rdev->dev, "Wait MC idle timeout before updating MC.\n");
        /* Write VRAM size in case we are limiting it */
        WREG32(R_0000F8_CONFIG_MEMSIZE, rdev->mc.real_vram_size);
        /* Program MC, should be a 32bits limited address space */
        WREG32_MC(R_000004_MC_FB_LOCATION,
                        S_000004_MC_FB_START(rdev->mc.vram_start >> 16) |
                        S_000004_MC_FB_TOP(rdev->mc.vram_end >> 16));
        WREG32(R_000134_HDP_FB_LOCATION,
                S_000134_HDP_FB_START(rdev->mc.vram_start >> 16));
        if (rdev->flags & RADEON_IS_AGP) {
                WREG32_MC(R_000005_MC_AGP_LOCATION,
                        S_000005_MC_AGP_START(rdev->mc.gtt_start >> 16) |
                        S_000005_MC_AGP_TOP(rdev->mc.gtt_end >> 16));
                WREG32_MC(R_000006_AGP_BASE, lower_32_bits(rdev->mc.agp_base));
                WREG32_MC(R_000007_AGP_BASE_2,
                        S_000007_AGP_BASE_ADDR_2(upper_32_bits(rdev->mc.agp_base)));
        } else {
                WREG32_MC(R_000005_MC_AGP_LOCATION, 0xFFFFFFFF);
                WREG32_MC(R_000006_AGP_BASE, 0);
                WREG32_MC(R_000007_AGP_BASE_2, 0);
        }

        rv515_mc_resume(rdev, &save);
}

static int r520_startup(struct radeon_device *rdev)
{
        int r;

        r520_mc_program(rdev);
        /* Resume clock */
        rv515_clock_startup(rdev);
        /* Initialize GPU configuration (# pipes, ...) */
        r520_gpu_init(rdev);
        /* Initialize GART (initialize after TTM so we can allocate
         * memory through TTM but finalize after TTM) */
        if (rdev->flags & RADEON_IS_PCIE) {
                r = rv370_pcie_gart_enable(rdev);
                if (r)
                        return r;
        }
        /* Enable IRQ */
        rdev->irq.sw_int = true;
        rs600_irq_set(rdev);
        /* 1M ring buffer */
        r = r100_cp_init(rdev, 1024 * 1024);
        if (r) {
                dev_err(rdev->dev, "failled initializing CP (%d).\n", r);
                return r;
        }
        r = r100_wb_init(rdev);
        if (r)
                dev_err(rdev->dev, "failled initializing WB (%d).\n", r);
        r = r100_ib_init(rdev);
        if (r) {
                dev_err(rdev->dev, "failled initializing IB (%d).\n", r);
                return r;
        }
        return 0;
}

int r520_resume(struct radeon_device *rdev)
{
        /* Make sur GART are not working */
        if (rdev->flags & RADEON_IS_PCIE)
                rv370_pcie_gart_disable(rdev);
        /* Resume clock before doing reset */
        rv515_clock_startup(rdev);
        /* Reset gpu before posting otherwise ATOM will enter infinite loop */
        if (radeon_gpu_reset(rdev)) {
                dev_warn(rdev->dev, "GPU reset failed ! (0xE40=0x%08X, 0x7C0=0x%08X)\n",
                        RREG32(R_000E40_RBBM_STATUS),
                        RREG32(R_0007C0_CP_STAT));
        }
        /* post */
        atom_asic_init(rdev->mode_info.atom_context);
        /* Resume clock after posting */
        rv515_clock_startup(rdev);
        return r520_startup(rdev);
}

int r520_init(struct radeon_device *rdev)
{
        int r;

        /* Initialize scratch registers */
        radeon_scratch_init(rdev);
        /* Initialize surface registers */
        radeon_surface_init(rdev);
        /* TODO: disable VGA need to use VGA request */
        /* BIOS*/
        if (!radeon_get_bios(rdev)) {
                if (ASIC_IS_AVIVO(rdev))
                        return -EINVAL;
        }
        if (rdev->is_atom_bios) {
                r = radeon_atombios_init(rdev);
                if (r)
                        return r;
        } else {
                dev_err(rdev->dev, "Expecting atombios for RV515 GPU\n");
                return -EINVAL;
        }
        /* Reset gpu before posting otherwise ATOM will enter infinite loop */
        if (radeon_gpu_reset(rdev)) {
                dev_warn(rdev->dev,
                        "GPU reset failed ! (0xE40=0x%08X, 0x7C0=0x%08X)\n",
                        RREG32(R_000E40_RBBM_STATUS),
                        RREG32(R_0007C0_CP_STAT));
        }
        /* check if cards are posted or not */
        if (!radeon_card_posted(rdev) && rdev->bios) {
                DRM_INFO("GPU not posted. posting now...\n");
                atom_asic_init(rdev->mode_info.atom_context);
        }
        /* Initialize clocks */
        radeon_get_clock_info(rdev->ddev);
        /* Initialize power management */
        radeon_pm_init(rdev);
        /* Get vram informations */
        r520_vram_info(rdev);
        /* Initialize memory controller (also test AGP) */
        r = r420_mc_init(rdev);
        if (r)
                return r;
        rv515_debugfs(rdev);
        /* Fence driver */
        r = radeon_fence_driver_init(rdev);
        if (r)
                return r;
        r = radeon_irq_kms_init(rdev);
        if (r)
                return r;
        /* Memory manager */
        r = radeon_object_init(rdev);
        if (r)
                return r;
        r = rv370_pcie_gart_init(rdev);
        if (r)
                return r;
        rv515_set_safe_registers(rdev);
        rdev->accel_working = true;
        r = r520_startup(rdev);
        if (r) {
                /* Somethings want wront with the accel init stop accel */
                dev_err(rdev->dev, "Disabling GPU acceleration\n");
                rv515_suspend(rdev);
                r100_cp_fini(rdev);
                r100_wb_fini(rdev);
                r100_ib_fini(rdev);
                rv370_pcie_gart_fini(rdev);
                radeon_agp_fini(rdev);
                radeon_irq_kms_fini(rdev);
                rdev->accel_working = false;
        }
        return 0;
}