/*
 * drivers/video/tegra/host/t20/t20.c
 *
 * Tegra Graphics Init for T20 Architecture Chips
 *
 * Copyright (c) 2011-2012, NVIDIA Corporation.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope 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, see <http://www.gnu.org/licenses/>.
 */

#include <linux/slab.h>
#include <linux/nvhost_ioctl.h>
#include <mach/powergate.h>
#include <mach/iomap.h>
#include "t20.h"
#include "host1x/host1x_syncpt.h"
#include "host1x/host1x_hardware.h"
#include "gr3d/gr3d.h"
#include "gr3d/gr3d_t20.h"
#include "mpe/mpe.h"
#include "host1x/host1x.h"
#include "nvhost_hwctx.h"
#include "nvhost_channel.h"
#include "host1x/host1x_channel.h"
#include "host1x/host1x_cdma.h"
#include "chip_support.h"
#include "nvmap.h"
#include "nvhost_memmgr.h"

#define NVMODMUTEX_2D_FULL	(1)
#define NVMODMUTEX_2D_SIMPLE	(2)
#define NVMODMUTEX_2D_SB_A	(3)
#define NVMODMUTEX_2D_SB_B	(4)
#define NVMODMUTEX_3D		(5)
#define NVMODMUTEX_DISPLAYA	(6)
#define NVMODMUTEX_DISPLAYB	(7)
#define NVMODMUTEX_VI		(8)
#define NVMODMUTEX_DSI		(9)

static int t20_num_alloc_channels = 0;

static struct resource tegra_host1x01_resources[] = {
	{
		.start = TEGRA_HOST1X_BASE,
		.end = TEGRA_HOST1X_BASE + TEGRA_HOST1X_SIZE - 1,
		.flags = IORESOURCE_MEM,
	},
	{
		.start = INT_SYNCPT_THRESH_BASE,
		.end = INT_SYNCPT_THRESH_BASE + INT_SYNCPT_THRESH_NR - 1,
		.flags = IORESOURCE_IRQ,
	},
	{
		.start = INT_HOST1X_MPCORE_GENERAL,
		.end = INT_HOST1X_MPCORE_GENERAL,
		.flags = IORESOURCE_IRQ,
	},
};

static const char *s_syncpt_names[32] = {
	"gfx_host",
	"", "", "", "", "", "", "",
	"disp0_a", "disp1_a", "avp_0",
	"csi_vi_0", "csi_vi_1",
	"vi_isp_0", "vi_isp_1", "vi_isp_2", "vi_isp_3", "vi_isp_4",
	"2d_0", "2d_1",
	"disp0_b", "disp1_b",
	"3d",
	"mpe",
	"disp0_c", "disp1_c",
	"vblank0", "vblank1",
	"mpe_ebm_eof", "mpe_wr_safe",
	"2d_tinyblt",
	"dsi"
};

static struct host1x_device_info host1x01_info = {
	.nb_channels	= 8,
	.nb_pts		= 32,
	.nb_mlocks	= 16,
	.nb_bases	= 8,
	.syncpt_names	= s_syncpt_names,
	.client_managed	= NVSYNCPTS_CLIENT_MANAGED,
};

static struct nvhost_device tegra_host1x01_device = {
	.dev		= {.platform_data = &host1x01_info},
	.name		= "host1x",
	.id		= -1,
	.resource	= tegra_host1x01_resources,
	.num_resources	= ARRAY_SIZE(tegra_host1x01_resources),
	.clocks		= {{"host1x", UINT_MAX}, {} },
	NVHOST_MODULE_NO_POWERGATE_IDS,
};

static struct nvhost_device tegra_display01_device = {
	.name		= "display",
	.id		= -1,
	.index		= 0,
	.syncpts	= BIT(NVSYNCPT_DISP0_A) | BIT(NVSYNCPT_DISP1_A) |
			  BIT(NVSYNCPT_DISP0_B) | BIT(NVSYNCPT_DISP1_B) |
			  BIT(NVSYNCPT_DISP0_C) | BIT(NVSYNCPT_DISP1_C) |
			  BIT(NVSYNCPT_VBLANK0) | BIT(NVSYNCPT_VBLANK1),
	.modulemutexes	= BIT(NVMODMUTEX_DISPLAYA) | BIT(NVMODMUTEX_DISPLAYB),
	NVHOST_MODULE_NO_POWERGATE_IDS,
	NVHOST_DEFAULT_CLOCKGATE_DELAY,
	.moduleid	= NVHOST_MODULE_NONE,
};

static struct nvhost_device tegra_gr3d01_device = {
	.name		= "gr3d",
	.version	= 1,
	.id		= -1,
	.index		= 1,
	.syncpts	= BIT(NVSYNCPT_3D),
	.waitbases	= BIT(NVWAITBASE_3D),
	.modulemutexes	= BIT(NVMODMUTEX_3D),
	.class		= NV_GRAPHICS_3D_CLASS_ID,
	.clocks		= {{"gr3d", UINT_MAX}, {"emc", UINT_MAX}, {} },
	.powergate_ids	= {TEGRA_POWERGATE_3D, -1},
	NVHOST_DEFAULT_CLOCKGATE_DELAY,
	.moduleid	= NVHOST_MODULE_NONE,
};

static struct nvhost_device tegra_gr2d01_device = {
	.name		= "gr2d",
	.id		= -1,
	.index		= 2,
	.syncpts	= BIT(NVSYNCPT_2D_0) | BIT(NVSYNCPT_2D_1),
	.waitbases	= BIT(NVWAITBASE_2D_0) | BIT(NVWAITBASE_2D_1),
	.modulemutexes	= BIT(NVMODMUTEX_2D_FULL) | BIT(NVMODMUTEX_2D_SIMPLE) |
			  BIT(NVMODMUTEX_2D_SB_A) | BIT(NVMODMUTEX_2D_SB_B),
	.clocks		= { {"gr2d", UINT_MAX},
			    {"epp", UINT_MAX},
			    {"emc", UINT_MAX} },
	NVHOST_MODULE_NO_POWERGATE_IDS,
	.clockgate_delay = 0,
	.moduleid	= NVHOST_MODULE_NONE,
};

static struct resource isp_resources_t20[] = {
	{
		.name = "regs",
		.start = TEGRA_ISP_BASE,
		.end = TEGRA_ISP_BASE + TEGRA_ISP_SIZE - 1,
		.flags = IORESOURCE_MEM,
	}
};

static struct nvhost_device tegra_isp01_device = {
	.name		= "isp",
	.id		= -1,
	.resource = isp_resources_t20,
	.num_resources = ARRAY_SIZE(isp_resources_t20),
	.index		= 3,
	.syncpts	= 0,
	NVHOST_MODULE_NO_POWERGATE_IDS,
	NVHOST_DEFAULT_CLOCKGATE_DELAY,
	.moduleid	= NVHOST_MODULE_ISP,
};

static struct resource vi_resources[] = {
	{
		.name = "regs",
		.start = TEGRA_VI_BASE,
		.end = TEGRA_VI_BASE + TEGRA_VI_SIZE - 1,
		.flags = IORESOURCE_MEM,
	},
};

static struct nvhost_device tegra_vi01_device = {
	.name		= "vi",
	.resource = vi_resources,
	.num_resources = ARRAY_SIZE(vi_resources),
	.id		= -1,
	.index		= 4,
	.syncpts	= BIT(NVSYNCPT_CSI_VI_0) | BIT(NVSYNCPT_CSI_VI_1) |
			  BIT(NVSYNCPT_VI_ISP_0) | BIT(NVSYNCPT_VI_ISP_1) |
			  BIT(NVSYNCPT_VI_ISP_2) | BIT(NVSYNCPT_VI_ISP_3) |
			  BIT(NVSYNCPT_VI_ISP_4),
	.modulemutexes	= BIT(NVMODMUTEX_VI),
	.exclusive	= true,
	NVHOST_MODULE_NO_POWERGATE_IDS,
	NVHOST_DEFAULT_CLOCKGATE_DELAY,
	.moduleid	= NVHOST_MODULE_VI,
};

static struct resource tegra_mpe01_resources[] = {
	{
		.name = "regs",
		.start = TEGRA_MPE_BASE,
		.end = TEGRA_MPE_BASE + TEGRA_MPE_SIZE - 1,
		.flags = IORESOURCE_MEM,
	},
};

static struct nvhost_device tegra_mpe01_device = {
	.name		= "mpe",
	.version	= 1,
	.id		= -1,
	.resource	= tegra_mpe01_resources,
	.num_resources	= ARRAY_SIZE(tegra_mpe01_resources),
	.index		= 5,
	.syncpts	= BIT(NVSYNCPT_MPE) | BIT(NVSYNCPT_MPE_EBM_EOF) |
			  BIT(NVSYNCPT_MPE_WR_SAFE),
	.waitbases	= BIT(NVWAITBASE_MPE),
	.class		= NV_VIDEO_ENCODE_MPEG_CLASS_ID,
	.waitbasesync	= true,
	.keepalive	= true,
	.clocks		= { {"mpe", UINT_MAX},
			    {"emc", UINT_MAX} },
	.powergate_ids	= {TEGRA_POWERGATE_MPE, -1},
	NVHOST_DEFAULT_CLOCKGATE_DELAY,
	.moduleid	= NVHOST_MODULE_MPE,
};

static struct nvhost_device tegra_dsi01_device = {
	.name		= "dsi",
	.id		= -1,
	.index		= 6,
	.syncpts	= BIT(NVSYNCPT_DSI),
	.modulemutexes	= BIT(NVMODMUTEX_DSI),
	NVHOST_MODULE_NO_POWERGATE_IDS,
	NVHOST_DEFAULT_CLOCKGATE_DELAY,
	.moduleid	= NVHOST_MODULE_NONE,
};

static struct nvhost_device *t20_devices[] = {
	&tegra_host1x01_device,
	&tegra_display01_device,
	&tegra_gr3d01_device,
	&tegra_gr2d01_device,
	&tegra_isp01_device,
	&tegra_vi01_device,
	&tegra_mpe01_device,
	&tegra_dsi01_device,
};

int tegra2_register_host1x_devices(void)
{
	return nvhost_add_devices(t20_devices, ARRAY_SIZE(t20_devices));
}

static inline void __iomem *t20_channel_aperture(void __iomem *p, int ndx)
{
	p += ndx * NV_HOST1X_CHANNEL_MAP_SIZE_BYTES;
	return p;
}

static inline int t20_nvhost_hwctx_handler_init(struct nvhost_channel *ch)
{
	int err = 0;
	unsigned long syncpts = ch->dev->syncpts;
	unsigned long waitbases = ch->dev->waitbases;
	u32 syncpt = find_first_bit(&syncpts, BITS_PER_LONG);
	u32 waitbase = find_first_bit(&waitbases, BITS_PER_LONG);
	struct nvhost_driver *drv = to_nvhost_driver(ch->dev->dev.driver);

	if (drv->alloc_hwctx_handler) {
		ch->ctxhandler = drv->alloc_hwctx_handler(syncpt,
				waitbase, ch);
		if (!ch->ctxhandler)
			err = -ENOMEM;
	}

	return err;
}

static int t20_channel_init(struct nvhost_channel *ch,
	struct nvhost_master *dev, int index)
{
	ch->chid = index;
	mutex_init(&ch->reflock);
	mutex_init(&ch->submitlock);

	ch->aperture = t20_channel_aperture(dev->aperture, index);

	return t20_nvhost_hwctx_handler_init(ch);
}

int nvhost_init_t20_channel_support(struct nvhost_master *host,
	struct nvhost_chip_support *op)
{
	op->channel.init = t20_channel_init;
	op->channel.submit = host1x_channel_submit;
	op->channel.read3dreg = host1x_channel_read_3d_reg;

	return 0;
}

static void t20_free_nvhost_channel(struct nvhost_channel *ch)
{
	nvhost_free_channel_internal(ch, &t20_num_alloc_channels);
}

static struct nvhost_channel *t20_alloc_nvhost_channel(
		struct nvhost_device *dev)
{
	return nvhost_alloc_channel_internal(dev->index,
		nvhost_get_host(dev)->info.nb_channels,
		&t20_num_alloc_channels);
}

int nvhost_init_t20_support(struct nvhost_master *host,
	struct nvhost_chip_support *op)
{
	int err;

	/* don't worry about cleaning up on failure... "remove" does it. */
	err = nvhost_init_t20_channel_support(host, op);
	if (err)
		return err;
	err = host1x_init_cdma_support(op);
	if (err)
		return err;
	err = nvhost_init_t20_debug_support(op);
	if (err)
		return err;
	err = host1x_init_syncpt_support(host, op);
	if (err)
		return err;
	err = nvhost_init_t20_intr_support(op);
	if (err)
		return err;
	err = nvhost_memmgr_init(op);

	op->nvhost_dev.alloc_nvhost_channel = t20_alloc_nvhost_channel;
	op->nvhost_dev.free_nvhost_channel = t20_free_nvhost_channel;

	return 0;
}