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vdoa.c
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vdoa.c
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/*
* Copyright (C) 2012-2013 Freescale Semiconductor, Inc. All Rights Reserved.
*
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <linux/clk.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/ipu.h>
#include <linux/genalloc.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/types.h>
#include "vdoa.h"
/* 6band(3field* double buffer) * (width*2) * bandline(8)
= 6x1024x2x8 = 96k or 72k(1.5byte) */
#define MAX_VDOA_IRAM_SIZE (1024*96)
#define VDOA_IRAM_SIZE (1024*72)
#define VDOAC_BAND_HEIGHT_32LINES (32)
#define VDOAC_BAND_HEIGHT_16LINES (16)
#define VDOAC_BAND_HEIGHT_8LINES (8)
#define VDOAC_THREE_FRAMES (0x1 << 2)
#define VDOAC_SYNC_BAND_MODE (0x1 << 3)
#define VDOAC_SCAN_ORDER_INTERLACED (0x1 << 4)
#define VDOAC_PFS_YUYV (0x1 << 5)
#define VDOAC_IPU_SEL_1 (0x1 << 6)
#define VDOAFP_FH_MASK (0x1FFF)
#define VDOAFP_FH_SHIFT (16)
#define VDOAFP_FW_MASK (0x3FFF)
#define VDOAFP_FW_SHIFT (0)
#define VDOASL_VSLY_MASK (0x3FFF)
#define VDOASL_VSLY_SHIFT (16)
#define VDOASL_ISLY_MASK (0x7FFF)
#define VDOASL_ISLY_SHIFT (0)
#define VDOASRR_START_XFER (0x2)
#define VDOASRR_SWRST (0x1)
#define VDOAIEIST_TRANSFER_ERR (0x2)
#define VDOAIEIST_TRANSFER_END (0x1)
#define VDOAC (0x0) /* Control Register */
#define VDOASRR (0x4) /* Start and Reset Register */
#define VDOAIE (0x8) /* Interrupt Enable Register */
#define VDOAIST (0xc) /* Interrupt Status Register */
#define VDOAFP (0x10) /* Frame Parameters Register */
#define VDOAIEBA00 (0x14) /* External Buffer n Frame m Address Register */
#define VDOAIEBA01 (0x18) /* External Buffer n Frame m Address Register */
#define VDOAIEBA02 (0x1c) /* External Buffer n Frame m Address Register */
#define VDOAIEBA10 (0x20) /* External Buffer n Frame m Address Register */
#define VDOAIEBA11 (0x24) /* External Buffer n Frame m Address Register */
#define VDOAIEBA12 (0x28) /* External Buffer n Frame m Address Register */
#define VDOASL (0x2c) /* IPU Stride Line Register */
#define VDOAIUBO (0x30) /* IPU Chroma Buffer Offset Register */
#define VDOAVEBA0 (0x34) /* External Buffer m Address Register */
#define VDOAVEBA1 (0x38) /* External Buffer m Address Register */
#define VDOAVEBA2 (0x3c) /* External Buffer m Address Register */
#define VDOAVUBO (0x40) /* VPU Chroma Buffer Offset */
#define VDOASR (0x44) /* Status Register */
#define VDOATD (0x48) /* Test Debug Register */
enum {
VDOA_INIT = 0x1,
VDOA_GET = 0x2,
VDOA_SETUP = 0x4,
VDOA_GET_OBUF = 0x8,
VDOA_START = 0x10,
VDOA_INIRQ = 0x20,
VDOA_STOP = 0x40,
VDOA_PUT = VDOA_INIT,
};
enum {
VDOA_NULL = 0,
VDOA_FRAME = 1,
VDOA_PREV_FIELD = 2,
VDOA_CURR_FIELD = 3,
VDOA_NEXT_FIELD = 4,
};
#define CHECK_STATE(expect, retcode) \
do { \
if (!((expect) & vdoa->state)) { \
dev_err(vdoa->dev, "ERR: %s state:0x%x, expect:0x%x.\n",\
__func__, vdoa->state, (expect)); \
retcode; \
} \
} while (0)
#define CHECK_NULL_PTR(ptr) \
do { \
pr_debug("vdoa_ptr:0x%p in %s state:0x%x.\n", \
vdoa, __func__, vdoa->state); \
if (NULL == (ptr)) { \
pr_err("ERR vdoa: %s state:0x%x null ptr.\n", \
__func__, vdoa->state); \
} \
} while (0)
struct vdoa_info {
int state;
struct device *dev;
struct clk *vdoa_clk;
void __iomem *reg_base;
struct gen_pool *iram_pool;
unsigned long iram_base;
unsigned long iram_paddr;
int irq;
int field;
struct completion comp;
};
static struct vdoa_info *g_vdoa;
static unsigned long iram_size;
static DEFINE_MUTEX(vdoa_lock);
static inline void vdoa_read_register(struct vdoa_info *vdoa,
u32 reg, u32 *val)
{
*val = ioread32(vdoa->reg_base + reg);
dev_dbg(vdoa->dev, "read_reg:0x%02x, val:0x%08x.\n", reg, *val);
}
static inline void vdoa_write_register(struct vdoa_info *vdoa,
u32 reg, u32 val)
{
iowrite32(val, vdoa->reg_base + reg);
dev_dbg(vdoa->dev, "\t\twrite_reg:0x%02x, val:0x%08x.\n", reg, val);
}
static void dump_registers(struct vdoa_info *vdoa)
{
int i;
u32 data;
for (i = VDOAC; i < VDOATD; i += 4)
vdoa_read_register(vdoa, i, &data);
}
int vdoa_setup(vdoa_handle_t handle, struct vdoa_params *params)
{
int band_size;
int total_band_size = 0;
int ipu_stride;
u32 data;
struct vdoa_info *vdoa = (struct vdoa_info *)handle;
CHECK_NULL_PTR(vdoa);
CHECK_STATE(VDOA_GET | VDOA_GET_OBUF | VDOA_STOP, return -EINVAL);
if (VDOA_GET == vdoa->state) {
dev_dbg(vdoa->dev, "w:%d, h:%d.\n",
params->width, params->height);
data = (params->band_lines == VDOAC_BAND_HEIGHT_32LINES) ? 2 :
((params->band_lines == VDOAC_BAND_HEIGHT_16LINES) ?
1 : 0);
data |= params->scan_order ? VDOAC_SCAN_ORDER_INTERLACED : 0;
data |= params->band_mode ? VDOAC_SYNC_BAND_MODE : 0;
data |= params->pfs ? VDOAC_PFS_YUYV : 0;
data |= params->ipu_num ? VDOAC_IPU_SEL_1 : 0;
vdoa_write_register(vdoa, VDOAC, data);
data = ((params->width & VDOAFP_FW_MASK) << VDOAFP_FW_SHIFT) |
((params->height & VDOAFP_FH_MASK) << VDOAFP_FH_SHIFT);
vdoa_write_register(vdoa, VDOAFP, data);
ipu_stride = params->pfs ? params->width << 1 : params->width;
data = ((params->vpu_stride & VDOASL_VSLY_MASK) <<
VDOASL_VSLY_SHIFT) |
((ipu_stride & VDOASL_ISLY_MASK) << VDOASL_ISLY_SHIFT);
vdoa_write_register(vdoa, VDOASL, data);
dev_dbg(vdoa->dev, "band_mode:%d, band_line:%d, base:0x%lx.\n",
params->band_mode, params->band_lines, vdoa->iram_paddr);
}
/*
* band size = (luma_per_line + chroma_per_line) * bandLines
* = width * (3/2 or 2) * bandLines
* double buffer mode used.
*/
if (params->pfs)
band_size = (params->width << 1) * params->band_lines;
else
band_size = ((params->width * 3) >> 1) *
params->band_lines;
if (params->interlaced) {
total_band_size = 6 * band_size; /* 3 frames*double buffer */
if (iram_size < total_band_size) {
dev_err(vdoa->dev, "iram_size:0x%lx is smaller than "
"request:0x%x!\n", iram_size, total_band_size);
return -EINVAL;
}
if (params->vfield_buf.prev_veba) {
if (params->band_mode) {
vdoa_write_register(vdoa, VDOAIEBA00,
vdoa->iram_paddr);
vdoa_write_register(vdoa, VDOAIEBA10,
vdoa->iram_paddr + band_size);
} else
vdoa_write_register(vdoa, VDOAIEBA00,
params->ieba0);
vdoa_write_register(vdoa, VDOAVEBA0,
params->vfield_buf.prev_veba);
vdoa->field = VDOA_PREV_FIELD;
}
if (params->vfield_buf.cur_veba) {
if (params->band_mode) {
vdoa_write_register(vdoa, VDOAIEBA01,
vdoa->iram_paddr + band_size * 2);
vdoa_write_register(vdoa, VDOAIEBA11,
vdoa->iram_paddr + band_size * 3);
} else
vdoa_write_register(vdoa, VDOAIEBA01,
params->ieba1);
vdoa_write_register(vdoa, VDOAVEBA1,
params->vfield_buf.cur_veba);
vdoa->field = VDOA_CURR_FIELD;
}
if (params->vfield_buf.next_veba) {
if (params->band_mode) {
vdoa_write_register(vdoa, VDOAIEBA02,
vdoa->iram_paddr + band_size * 4);
vdoa_write_register(vdoa, VDOAIEBA12,
vdoa->iram_paddr + band_size * 5);
} else
vdoa_write_register(vdoa, VDOAIEBA02,
params->ieba2);
vdoa_write_register(vdoa, VDOAVEBA2,
params->vfield_buf.next_veba);
vdoa->field = VDOA_NEXT_FIELD;
vdoa_read_register(vdoa, VDOAC, &data);
data |= VDOAC_THREE_FRAMES;
vdoa_write_register(vdoa, VDOAC, data);
}
if (!params->pfs)
vdoa_write_register(vdoa, VDOAIUBO,
params->width * params->band_lines);
vdoa_write_register(vdoa, VDOAVUBO,
params->vfield_buf.vubo);
dev_dbg(vdoa->dev, "total band_size:0x%x.\n", band_size*6);
} else if (params->band_mode) {
/* used for progressive frame resize on PrP channel */
BUG(); /* currently not support */
/* progressvie frame: band mode */
vdoa_write_register(vdoa, VDOAIEBA00, vdoa->iram_paddr);
vdoa_write_register(vdoa, VDOAIEBA10,
vdoa->iram_paddr + band_size);
if (!params->pfs)
vdoa_write_register(vdoa, VDOAIUBO,
params->width * params->band_lines);
dev_dbg(vdoa->dev, "total band_size:0x%x\n", band_size*2);
} else {
/* progressive frame: mem->mem, non-band mode */
vdoa->field = VDOA_FRAME;
vdoa_write_register(vdoa, VDOAVEBA0, params->vframe_buf.veba);
vdoa_write_register(vdoa, VDOAVUBO, params->vframe_buf.vubo);
vdoa_write_register(vdoa, VDOAIEBA00, params->ieba0);
if (!params->pfs)
/* note: iubo is relative value, based on ieba0 */
vdoa_write_register(vdoa, VDOAIUBO,
params->width * params->height);
}
vdoa->state = VDOA_SETUP;
return 0;
}
void vdoa_get_output_buf(vdoa_handle_t handle, struct vdoa_ipu_buf *buf)
{
u32 data;
struct vdoa_info *vdoa = (struct vdoa_info *)handle;
CHECK_NULL_PTR(vdoa);
CHECK_STATE(VDOA_SETUP, return);
vdoa->state = VDOA_GET_OBUF;
memset(buf, 0, sizeof(*buf));
vdoa_read_register(vdoa, VDOAC, &data);
switch (vdoa->field) {
case VDOA_FRAME:
case VDOA_PREV_FIELD:
vdoa_read_register(vdoa, VDOAIEBA00, &buf->ieba0);
if (data & VDOAC_SYNC_BAND_MODE)
vdoa_read_register(vdoa, VDOAIEBA10, &buf->ieba1);
break;
case VDOA_CURR_FIELD:
vdoa_read_register(vdoa, VDOAIEBA01, &buf->ieba0);
vdoa_read_register(vdoa, VDOAIEBA11, &buf->ieba1);
break;
case VDOA_NEXT_FIELD:
vdoa_read_register(vdoa, VDOAIEBA02, &buf->ieba0);
vdoa_read_register(vdoa, VDOAIEBA12, &buf->ieba1);
break;
default:
BUG();
break;
}
if (!(data & VDOAC_PFS_YUYV))
vdoa_read_register(vdoa, VDOAIUBO, &buf->iubo);
}
int vdoa_start(vdoa_handle_t handle, int timeout_ms)
{
int ret;
struct vdoa_info *vdoa = (struct vdoa_info *)handle;
CHECK_NULL_PTR(vdoa);
CHECK_STATE(VDOA_GET_OBUF, return -EINVAL);
vdoa->state = VDOA_START;
init_completion(&vdoa->comp);
vdoa_write_register(vdoa, VDOAIST,
VDOAIEIST_TRANSFER_ERR | VDOAIEIST_TRANSFER_END);
vdoa_write_register(vdoa, VDOAIE,
VDOAIEIST_TRANSFER_ERR | VDOAIEIST_TRANSFER_END);
enable_irq(vdoa->irq);
vdoa_write_register(vdoa, VDOASRR, VDOASRR_START_XFER);
dump_registers(vdoa);
ret = wait_for_completion_timeout(&vdoa->comp,
msecs_to_jiffies(timeout_ms));
return ret > 0 ? 0 : -ETIMEDOUT;
}
void vdoa_stop(vdoa_handle_t handle)
{
struct vdoa_info *vdoa = (struct vdoa_info *)handle;
CHECK_NULL_PTR(vdoa);
CHECK_STATE(VDOA_GET | VDOA_START | VDOA_INIRQ, return);
vdoa->state = VDOA_STOP;
disable_irq(vdoa->irq);
vdoa_write_register(vdoa, VDOASRR, VDOASRR_SWRST);
}
void vdoa_get_handle(vdoa_handle_t *handle)
{
struct vdoa_info *vdoa = g_vdoa;
CHECK_NULL_PTR(handle);
*handle = (vdoa_handle_t *)NULL;
CHECK_STATE(VDOA_INIT, return);
mutex_lock(&vdoa_lock);
clk_prepare_enable(vdoa->vdoa_clk);
vdoa->state = VDOA_GET;
vdoa->field = VDOA_NULL;
vdoa_write_register(vdoa, VDOASRR, VDOASRR_SWRST);
*handle = (vdoa_handle_t *)vdoa;
}
void vdoa_put_handle(vdoa_handle_t *handle)
{
struct vdoa_info *vdoa = (struct vdoa_info *)(*handle);
CHECK_NULL_PTR(vdoa);
CHECK_STATE(VDOA_STOP, return);
if (vdoa != g_vdoa)
BUG();
clk_disable_unprepare(vdoa->vdoa_clk);
vdoa->state = VDOA_PUT;
*handle = (vdoa_handle_t *)NULL;
mutex_unlock(&vdoa_lock);
}
static irqreturn_t vdoa_irq_handler(int irq, void *data)
{
u32 status, mask, val;
struct vdoa_info *vdoa = data;
CHECK_NULL_PTR(vdoa);
CHECK_STATE(VDOA_START, return IRQ_HANDLED);
vdoa->state = VDOA_INIRQ;
vdoa_read_register(vdoa, VDOAIST, &status);
vdoa_read_register(vdoa, VDOAIE, &mask);
val = status & mask;
vdoa_write_register(vdoa, VDOAIST, val);
if (VDOAIEIST_TRANSFER_ERR & val)
dev_err(vdoa->dev, "vdoa Transfer err irq!\n");
if (VDOAIEIST_TRANSFER_END & val)
dev_dbg(vdoa->dev, "vdoa Transfer end irq!\n");
if (0 == val) {
dev_err(vdoa->dev, "vdoa unknown irq!\n");
BUG();
}
complete(&vdoa->comp);
return IRQ_HANDLED;
}
/* IRAM Size in Kbytes, example:vdoa_iram_size=64, 64KBytes */
static int __init vdoa_iram_size_setup(char *options)
{
int ret;
ret = strict_strtoul(options, 0, &iram_size);
if (ret)
iram_size = 0;
else
iram_size *= SZ_1K;
return 1;
}
__setup("vdoa_iram_size=", vdoa_iram_size_setup);
static const struct of_device_id imx_vdoa_dt_ids[] = {
{ .compatible = "fsl,imx6q-vdoa", },
{ /* sentinel */ }
};
static int vdoa_probe(struct platform_device *pdev)
{
int ret;
struct vdoa_info *vdoa;
struct resource *res;
struct resource *res_irq;
struct device *dev = &pdev->dev;
struct device_node *np = pdev->dev.of_node;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
dev_err(dev, "can't get device resources\n");
return -ENOENT;
}
res_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
if (!res_irq) {
dev_err(dev, "failed to get irq resource\n");
return -ENOENT;
}
vdoa = devm_kzalloc(dev, sizeof(struct vdoa_info), GFP_KERNEL);
if (!vdoa)
return -ENOMEM;
vdoa->dev = dev;
vdoa->reg_base = devm_request_and_ioremap(&pdev->dev, res);
if (!vdoa->reg_base)
return -EBUSY;
vdoa->irq = res_irq->start;
ret = devm_request_irq(dev, vdoa->irq, vdoa_irq_handler, 0,
"vdoa", vdoa);
if (ret) {
dev_err(dev, "can't claim irq %d\n", vdoa->irq);
return ret;
}
disable_irq(vdoa->irq);
vdoa->vdoa_clk = devm_clk_get(dev, NULL);
if (IS_ERR(vdoa->vdoa_clk)) {
dev_err(dev, "failed to get vdoa_clk\n");
return PTR_ERR(vdoa->vdoa_clk);
}
vdoa->iram_pool = of_get_named_gen_pool(np, "iram", 0);
if (!vdoa->iram_pool) {
dev_err(&pdev->dev, "iram pool not available\n");
return -ENOMEM;
}
if ((iram_size == 0) || (iram_size > MAX_VDOA_IRAM_SIZE))
iram_size = VDOA_IRAM_SIZE;
vdoa->iram_base = gen_pool_alloc(vdoa->iram_pool, iram_size);
if (!vdoa->iram_base) {
dev_err(&pdev->dev, "unable to alloc iram\n");
return -ENOMEM;
}
vdoa->iram_paddr = gen_pool_virt_to_phys(vdoa->iram_pool,
vdoa->iram_base);
dev_dbg(dev, "iram_base:0x%lx,iram_paddr:0x%lx,size:0x%lx\n",
vdoa->iram_base, vdoa->iram_paddr, iram_size);
vdoa->state = VDOA_INIT;
dev_set_drvdata(dev, vdoa);
g_vdoa = vdoa;
dev_info(dev, "i.MX Video Data Order Adapter(VDOA) driver probed\n");
return 0;
}
static int vdoa_remove(struct platform_device *pdev)
{
struct vdoa_info *vdoa = dev_get_drvdata(&pdev->dev);
gen_pool_free(vdoa->iram_pool, vdoa->iram_base, iram_size);
kfree(vdoa);
dev_set_drvdata(&pdev->dev, NULL);
return 0;
}
static struct platform_driver vdoa_driver = {
.driver = {
.name = "mxc_vdoa",
.of_match_table = imx_vdoa_dt_ids,
},
.probe = vdoa_probe,
.remove = vdoa_remove,
};
static int __init vdoa_init(void)
{
int err;
err = platform_driver_register(&vdoa_driver);
if (err) {
pr_err("vdoa_driver register failed\n");
return -ENODEV;
}
return 0;
}
static void __exit vdoa_cleanup(void)
{
platform_driver_unregister(&vdoa_driver);
}
module_init(vdoa_init);
module_exit(vdoa_cleanup);
MODULE_AUTHOR("Freescale Semiconductor, Inc.");
MODULE_DESCRIPTION("i.MX Video Data Order Adapter(VDOA) driver");
MODULE_LICENSE("GPL");