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Commit 7954d5cf authored by Linus Torvalds's avatar Linus Torvalds
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Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx 

* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx:
  i.MX31: framebuffer driver
  i.MX31: Image Processing Unit DMA and IRQ drivers
  dmaengine: add async_tx_clear_ack() macro
  dmaengine: dma_issue_pending_all == nop when CONFIG_DMA_ENGINE=n
  dmaengine: kill some dubious WARN_ONCEs
  fsldma: print correct IRQ on mpc83xx
  fsldma: check for NO_IRQ in fsl_dma_chan_remove()
  dmatest: Use custom map/unmap for destination buffer
  fsldma: use a valid 'device' for dma_pool_create
  dmaengine: fix dependency chaining
parents 37f5fed5 86528da2
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arch/arm/plat-mxc/include/mach/ipu.h 0 → 100644
View file @ 7954d5cf
/*
* Copyright (C) 2008
* Guennadi Liakhovetski, DENX Software Engineering, <lg@denx.de>
*
* Copyright (C) 2005-2007 Freescale Semiconductor, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef _IPU_H_
#define _IPU_H_
#include <linux/types.h>
#include <linux/dmaengine.h>
/* IPU DMA Controller channel definitions. */
enum ipu_channel {
IDMAC_IC_0 = 0, /* IC (encoding task) to memory */
IDMAC_IC_1 = 1, /* IC (viewfinder task) to memory */
IDMAC_ADC_0 = 1,
IDMAC_IC_2 = 2,
IDMAC_ADC_1 = 2,
IDMAC_IC_3 = 3,
IDMAC_IC_4 = 4,
IDMAC_IC_5 = 5,
IDMAC_IC_6 = 6,
IDMAC_IC_7 = 7, /* IC (sensor data) to memory */
IDMAC_IC_8 = 8,
IDMAC_IC_9 = 9,
IDMAC_IC_10 = 10,
IDMAC_IC_11 = 11,
IDMAC_IC_12 = 12,
IDMAC_IC_13 = 13,
IDMAC_SDC_0 = 14, /* Background synchronous display data */
IDMAC_SDC_1 = 15, /* Foreground data (overlay) */
IDMAC_SDC_2 = 16,
IDMAC_SDC_3 = 17,
IDMAC_ADC_2 = 18,
IDMAC_ADC_3 = 19,
IDMAC_ADC_4 = 20,
IDMAC_ADC_5 = 21,
IDMAC_ADC_6 = 22,
IDMAC_ADC_7 = 23,
IDMAC_PF_0 = 24,
IDMAC_PF_1 = 25,
IDMAC_PF_2 = 26,
IDMAC_PF_3 = 27,
IDMAC_PF_4 = 28,
IDMAC_PF_5 = 29,
IDMAC_PF_6 = 30,
IDMAC_PF_7 = 31,
};
/* Order significant! */
enum ipu_channel_status {
IPU_CHANNEL_FREE,
IPU_CHANNEL_INITIALIZED,
IPU_CHANNEL_READY,
IPU_CHANNEL_ENABLED,
};
#define IPU_CHANNELS_NUM 32
enum pixel_fmt {
/* 1 byte */
IPU_PIX_FMT_GENERIC,
IPU_PIX_FMT_RGB332,
IPU_PIX_FMT_YUV420P,
IPU_PIX_FMT_YUV422P,
IPU_PIX_FMT_YUV420P2,
IPU_PIX_FMT_YVU422P,
/* 2 bytes */
IPU_PIX_FMT_RGB565,
IPU_PIX_FMT_RGB666,
IPU_PIX_FMT_BGR666,
IPU_PIX_FMT_YUYV,
IPU_PIX_FMT_UYVY,
/* 3 bytes */
IPU_PIX_FMT_RGB24,
IPU_PIX_FMT_BGR24,
/* 4 bytes */
IPU_PIX_FMT_GENERIC_32,
IPU_PIX_FMT_RGB32,
IPU_PIX_FMT_BGR32,
IPU_PIX_FMT_ABGR32,
IPU_PIX_FMT_BGRA32,
IPU_PIX_FMT_RGBA32,
};
enum ipu_color_space {
IPU_COLORSPACE_RGB,
IPU_COLORSPACE_YCBCR,
IPU_COLORSPACE_YUV
};
/*
* Enumeration of IPU rotation modes
*/
enum ipu_rotate_mode {
/* Note the enum values correspond to BAM value */
IPU_ROTATE_NONE = 0,
IPU_ROTATE_VERT_FLIP = 1,
IPU_ROTATE_HORIZ_FLIP = 2,
IPU_ROTATE_180 = 3,
IPU_ROTATE_90_RIGHT = 4,
IPU_ROTATE_90_RIGHT_VFLIP = 5,
IPU_ROTATE_90_RIGHT_HFLIP = 6,
IPU_ROTATE_90_LEFT = 7,
};
struct ipu_platform_data {
unsigned int irq_base;
};
/*
* Enumeration of DI ports for ADC.
*/
enum display_port {
DISP0,
DISP1,
DISP2,
DISP3
};
struct idmac_video_param {
unsigned short in_width;
unsigned short in_height;
uint32_t in_pixel_fmt;
unsigned short out_width;
unsigned short out_height;
uint32_t out_pixel_fmt;
unsigned short out_stride;
bool graphics_combine_en;
bool global_alpha_en;
bool key_color_en;
enum display_port disp;
unsigned short out_left;
unsigned short out_top;
};
/*
* Union of initialization parameters for a logical channel. So far only video
* parameters are used.
*/
union ipu_channel_param {
struct idmac_video_param video;
};
struct idmac_tx_desc {
struct dma_async_tx_descriptor txd;
struct scatterlist *sg; /* scatterlist for this */
unsigned int sg_len; /* tx-descriptor. */
struct list_head list;
};
struct idmac_channel {
struct dma_chan dma_chan;
dma_cookie_t completed; /* last completed cookie */
union ipu_channel_param params;
enum ipu_channel link; /* input channel, linked to the output */
enum ipu_channel_status status;
void *client; /* Only one client per channel */
unsigned int n_tx_desc;
struct idmac_tx_desc *desc; /* allocated tx-descriptors */
struct scatterlist *sg[2]; /* scatterlist elements in buffer-0 and -1 */
struct list_head free_list; /* free tx-descriptors */
struct list_head queue; /* queued tx-descriptors */
spinlock_t lock; /* protects sg[0,1], queue */
struct mutex chan_mutex; /* protects status, cookie, free_list */
bool sec_chan_en;
int active_buffer;
unsigned int eof_irq;
char eof_name[16]; /* EOF IRQ name for request_irq() */
};
#define to_tx_desc(tx) container_of(tx, struct idmac_tx_desc, txd)
#define to_idmac_chan(c) container_of(c, struct idmac_channel, dma_chan)
#endif
arch/arm/plat-mxc/include/mach/irqs.h
View file @ 7954d5cf
...@@ -35,7 +35,15 @@ ...@@ -35,7 +35,15 @@
#define MXC_BOARD_IRQ_START (MXC_INTERNAL_IRQS + MXC_GPIO_IRQS) #define MXC_BOARD_IRQ_START (MXC_INTERNAL_IRQS + MXC_GPIO_IRQS)
#define MXC_BOARD_IRQS 16 #define MXC_BOARD_IRQS 16
#define NR_IRQS (MXC_BOARD_IRQ_START + MXC_BOARD_IRQS) #define MXC_IPU_IRQ_START (MXC_BOARD_IRQ_START + MXC_BOARD_IRQS)
#ifdef CONFIG_MX3_IPU_IRQS
#define MX3_IPU_IRQS CONFIG_MX3_IPU_IRQS
#else
#define MX3_IPU_IRQS 0
#endif
#define NR_IRQS (MXC_IPU_IRQ_START + MX3_IPU_IRQS)
extern void imx_irq_set_priority(unsigned char irq, unsigned char prio); extern void imx_irq_set_priority(unsigned char irq, unsigned char prio);
......
arch/arm/plat-mxc/include/mach/mx3fb.h 0 → 100644
View file @ 7954d5cf
/*
* Copyright (C) 2008
* Guennadi Liakhovetski, DENX Software Engineering, <lg@denx.de>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef __ASM_ARCH_MX3FB_H__
#define __ASM_ARCH_MX3FB_H__
#include <linux/device.h>
#include <linux/fb.h>
/* Proprietary FB_SYNC_ flags */
#define FB_SYNC_OE_ACT_HIGH 0x80000000
#define FB_SYNC_CLK_INVERT 0x40000000
#define FB_SYNC_DATA_INVERT 0x20000000
#define FB_SYNC_CLK_IDLE_EN 0x10000000
#define FB_SYNC_SHARP_MODE 0x08000000
#define FB_SYNC_SWAP_RGB 0x04000000
#define FB_SYNC_CLK_SEL_EN 0x02000000
/**
* struct mx3fb_platform_data - mx3fb platform data
*
* @dma_dev: pointer to the dma-device, used for dma-slave connection
* @mode: pointer to a platform-provided per mxc_register_fb() videomode
*/
struct mx3fb_platform_data {
struct device *dma_dev;
const char *name;
const struct fb_videomode *mode;
int num_modes;
};
#endif
drivers/dma/Kconfig
View file @ 7954d5cf
...@@ -62,6 +62,25 @@ config MV_XOR ...@@ -62,6 +62,25 @@ config MV_XOR
---help--- ---help---
Enable support for the Marvell XOR engine. Enable support for the Marvell XOR engine.
config MX3_IPU
bool "MX3x Image Processing Unit support"
depends on ARCH_MX3
select DMA_ENGINE
default y
help
If you plan to use the Image Processing unit in the i.MX3x, say
Y here. If unsure, select Y.
config MX3_IPU_IRQS
int "Number of dynamically mapped interrupts for IPU"
depends on MX3_IPU
range 2 137
default 4
help
Out of 137 interrupt sources on i.MX31 IPU only very few are used.
To avoid bloating the irq_desc[] array we allocate a sufficient
number of IRQ slots and map them dynamically to specific sources.
config DMA_ENGINE config DMA_ENGINE
bool bool
......
drivers/dma/Makefile
View file @ 7954d5cf
...@@ -7,3 +7,4 @@ obj-$(CONFIG_INTEL_IOP_ADMA) += iop-adma.o ...@@ -7,3 +7,4 @@ obj-$(CONFIG_INTEL_IOP_ADMA) += iop-adma.o
obj-$(CONFIG_FSL_DMA) += fsldma.o obj-$(CONFIG_FSL_DMA) += fsldma.o
obj-$(CONFIG_MV_XOR) += mv_xor.o obj-$(CONFIG_MV_XOR) += mv_xor.o
obj-$(CONFIG_DW_DMAC) += dw_dmac.o obj-$(CONFIG_DW_DMAC) += dw_dmac.o
obj-$(CONFIG_MX3_IPU) += ipu/
drivers/dma/dmaengine.c
View file @ 7954d5cf
...@@ -329,9 +329,6 @@ struct dma_chan *dma_find_channel(enum dma_transaction_type tx_type) ...@@ -329,9 +329,6 @@ struct dma_chan *dma_find_channel(enum dma_transaction_type tx_type)
struct dma_chan *chan; struct dma_chan *chan;
int cpu; int cpu;
WARN_ONCE(dmaengine_ref_count == 0,
"client called %s without a reference", __func__);
cpu = get_cpu(); cpu = get_cpu();
chan = per_cpu_ptr(channel_table[tx_type], cpu)->chan; chan = per_cpu_ptr(channel_table[tx_type], cpu)->chan;
put_cpu(); put_cpu();
...@@ -348,9 +345,6 @@ void dma_issue_pending_all(void) ...@@ -348,9 +345,6 @@ void dma_issue_pending_all(void)
struct dma_device *device; struct dma_device *device;
struct dma_chan *chan; struct dma_chan *chan;
WARN_ONCE(dmaengine_ref_count == 0,
"client called %s without a reference", __func__);
rcu_read_lock(); rcu_read_lock();
list_for_each_entry_rcu(device, &dma_device_list, global_node) { list_for_each_entry_rcu(device, &dma_device_list, global_node) {
if (dma_has_cap(DMA_PRIVATE, device->cap_mask)) if (dma_has_cap(DMA_PRIVATE, device->cap_mask))
...@@ -961,6 +955,8 @@ void dma_run_dependencies(struct dma_async_tx_descriptor *tx) ...@@ -961,6 +955,8 @@ void dma_run_dependencies(struct dma_async_tx_descriptor *tx)
if (!dep) if (!dep)
return; return;
/* we'll submit tx->next now, so clear the link */
tx->next = NULL;
chan = dep->chan; chan = dep->chan;
/* keep submitting up until a channel switch is detected /* keep submitting up until a channel switch is detected
......
drivers/dma/dmatest.c
View file @ 7954d5cf
...@@ -217,6 +217,10 @@ static int dmatest_func(void *data) ...@@ -217,6 +217,10 @@ static int dmatest_func(void *data)
chan = thread->chan; chan = thread->chan;
while (!kthread_should_stop()) { while (!kthread_should_stop()) {
struct dma_device *dev = chan->device;
struct dma_async_tx_descriptor *tx;
dma_addr_t dma_src, dma_dest;
total_tests++; total_tests++;
len = dmatest_random() % test_buf_size + 1; len = dmatest_random() % test_buf_size + 1;
...@@ -226,10 +230,30 @@ static int dmatest_func(void *data) ...@@ -226,10 +230,30 @@ static int dmatest_func(void *data)
dmatest_init_srcbuf(thread->srcbuf, src_off, len); dmatest_init_srcbuf(thread->srcbuf, src_off, len);
dmatest_init_dstbuf(thread->dstbuf, dst_off, len); dmatest_init_dstbuf(thread->dstbuf, dst_off, len);
cookie = dma_async_memcpy_buf_to_buf(chan, dma_src = dma_map_single(dev->dev, thread->srcbuf + src_off,
thread->dstbuf + dst_off, len, DMA_TO_DEVICE);
thread->srcbuf + src_off, /* map with DMA_BIDIRECTIONAL to force writeback/invalidate */
len); dma_dest = dma_map_single(dev->dev, thread->dstbuf,
test_buf_size, DMA_BIDIRECTIONAL);
tx = dev->device_prep_dma_memcpy(chan, dma_dest + dst_off,
dma_src, len,
DMA_CTRL_ACK | DMA_COMPL_SKIP_DEST_UNMAP);
if (!tx) {
dma_unmap_single(dev->dev, dma_src, len, DMA_TO_DEVICE);
dma_unmap_single(dev->dev, dma_dest,
test_buf_size, DMA_BIDIRECTIONAL);
pr_warning("%s: #%u: prep error with src_off=0x%x "
"dst_off=0x%x len=0x%x\n",
thread_name, total_tests - 1,
src_off, dst_off, len);
msleep(100);
failed_tests++;
continue;
}
tx->callback = NULL;
cookie = tx->tx_submit(tx);
if (dma_submit_error(cookie)) { if (dma_submit_error(cookie)) {
pr_warning("%s: #%u: submit error %d with src_off=0x%x " pr_warning("%s: #%u: submit error %d with src_off=0x%x "
"dst_off=0x%x len=0x%x\n", "dst_off=0x%x len=0x%x\n",
...@@ -253,6 +277,9 @@ static int dmatest_func(void *data) ...@@ -253,6 +277,9 @@ static int dmatest_func(void *data)
failed_tests++; failed_tests++;
continue; continue;
} }
/* Unmap by myself (see DMA_COMPL_SKIP_DEST_UNMAP above) */
dma_unmap_single(dev->dev, dma_dest,
test_buf_size, DMA_BIDIRECTIONAL);
error_count = 0; error_count = 0;
......
drivers/dma/fsldma.c
View file @ 7954d5cf
...@@ -822,7 +822,7 @@ static int __devinit fsl_dma_chan_probe(struct fsl_dma_device *fdev, ...@@ -822,7 +822,7 @@ static int __devinit fsl_dma_chan_probe(struct fsl_dma_device *fdev,
*/ */
WARN_ON(fdev->feature != new_fsl_chan->feature); WARN_ON(fdev->feature != new_fsl_chan->feature);
new_fsl_chan->dev = &new_fsl_chan->common.dev->device; new_fsl_chan->dev = fdev->dev;
new_fsl_chan->reg_base = ioremap(new_fsl_chan->reg.start, new_fsl_chan->reg_base = ioremap(new_fsl_chan->reg.start,
new_fsl_chan->reg.end - new_fsl_chan->reg.start + 1); new_fsl_chan->reg.end - new_fsl_chan->reg.start + 1);
...@@ -875,7 +875,8 @@ static int __devinit fsl_dma_chan_probe(struct fsl_dma_device *fdev, ...@@ -875,7 +875,8 @@ static int __devinit fsl_dma_chan_probe(struct fsl_dma_device *fdev,
} }
dev_info(fdev->dev, "#%d (%s), irq %d\n", new_fsl_chan->id, dev_info(fdev->dev, "#%d (%s), irq %d\n", new_fsl_chan->id,
compatible, new_fsl_chan->irq); compatible,
new_fsl_chan->irq != NO_IRQ ? new_fsl_chan->irq : fdev->irq);
return 0; return 0;
...@@ -890,7 +891,8 @@ err_no_reg: ...@@ -890,7 +891,8 @@ err_no_reg:
static void fsl_dma_chan_remove(struct fsl_dma_chan *fchan) static void fsl_dma_chan_remove(struct fsl_dma_chan *fchan)
{ {
free_irq(fchan->irq, fchan); if (fchan->irq != NO_IRQ)
free_irq(fchan->irq, fchan);
list_del(&fchan->common.device_node); list_del(&fchan->common.device_node);
iounmap(fchan->reg_base); iounmap(fchan->reg_base);
kfree(fchan); kfree(fchan);
......
drivers/dma/ipu/Makefile 0 → 100644
View file @ 7954d5cf
obj-y += ipu_irq.o ipu_idmac.o
drivers/dma/ipu/ipu_idmac.c 0 → 100644
View file @ 7954d5cf
/*
* Copyright (C) 2008
* Guennadi Liakhovetski, DENX Software Engineering, <lg@denx.de>
*
* Copyright (C) 2005-2007 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 version 2 as
* published by the Free Software Foundation.
*/
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/err.h>
#include <linux/spinlock.h>
#include <linux/delay.h>
#include <linux/list.h>
#include <linux/clk.h>
#include <linux/vmalloc.h>
#include <linux/string.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <mach/ipu.h>
#include "ipu_intern.h"
#define FS_VF_IN_VALID 0x00000002
#define FS_ENC_IN_VALID 0x00000001
/*
* There can be only one, we could allocate it dynamically, but then we'd have
* to add an extra parameter to some functions, and use something as ugly as
* struct ipu *ipu = to_ipu(to_idmac(ichan->dma_chan.device));
* in the ISR
*/
static struct ipu ipu_data;
#define to_ipu(id) container_of(id, struct ipu, idmac)
static u32 __idmac_read_icreg(struct ipu *ipu, unsigned long reg)
{
return __raw_readl(ipu->reg_ic + reg);
}
#define idmac_read_icreg(ipu, reg) __idmac_read_icreg(ipu, reg - IC_CONF)
static void __idmac_write_icreg(struct ipu *ipu, u32 value, unsigned long reg)
{
__raw_writel(value, ipu->reg_ic + reg);
}
#define idmac_write_icreg(ipu, v, reg) __idmac_write_icreg(ipu, v, reg - IC_CONF)
static u32 idmac_read_ipureg(struct ipu *ipu, unsigned long reg)
{
return __raw_readl(ipu->reg_ipu + reg);
}
static void idmac_write_ipureg(struct ipu *ipu, u32 value, unsigned long reg)
{
__raw_writel(value, ipu->reg_ipu + reg);
}
/*****************************************************************************
* IPU / IC common functions
*/
static void dump_idmac_reg(struct ipu *ipu)
{
dev_dbg(ipu->dev, "IDMAC_CONF 0x%x, IC_CONF 0x%x, IDMAC_CHA_EN 0x%x, "
"IDMAC_CHA_PRI 0x%x, IDMAC_CHA_BUSY 0x%x\n",
idmac_read_icreg(ipu, IDMAC_CONF),
idmac_read_icreg(ipu, IC_CONF),
idmac_read_icreg(ipu, IDMAC_CHA_EN),
idmac_read_icreg(ipu, IDMAC_CHA_PRI),
idmac_read_icreg(ipu, IDMAC_CHA_BUSY));
dev_dbg(ipu->dev, "BUF0_RDY 0x%x, BUF1_RDY 0x%x, CUR_BUF 0x%x, "
"DB_MODE 0x%x, TASKS_STAT 0x%x\n",
idmac_read_ipureg(ipu, IPU_CHA_BUF0_RDY),
idmac_read_ipureg(ipu, IPU_CHA_BUF1_RDY),
idmac_read_ipureg(ipu, IPU_CHA_CUR_BUF),
idmac_read_ipureg(ipu, IPU_CHA_DB_MODE_SEL),
idmac_read_ipureg(ipu, IPU_TASKS_STAT));
}
static uint32_t bytes_per_pixel(enum pixel_fmt fmt)
{
switch (fmt) {
case IPU_PIX_FMT_GENERIC: /* generic data */
case IPU_PIX_FMT_RGB332:
case IPU_PIX_FMT_YUV420P:
case IPU_PIX_FMT_YUV422P:
default:
return 1;
case IPU_PIX_FMT_RGB565:
case IPU_PIX_FMT_YUYV:
case IPU_PIX_FMT_UYVY:
return 2;
case IPU_PIX_FMT_BGR24:
case IPU_PIX_FMT_RGB24:
return 3;
case IPU_PIX_FMT_GENERIC_32: /* generic data */
case IPU_PIX_FMT_BGR32:
case IPU_PIX_FMT_RGB32:
case IPU_PIX_FMT_ABGR32:
return 4;
}
}
/* Enable / disable direct write to memory by the Camera Sensor Interface */
static void ipu_ic_enable_task(struct ipu *ipu, enum ipu_channel channel)
{
uint32_t ic_conf, mask;
switch (channel) {
case IDMAC_IC_0:
mask = IC_CONF_PRPENC_EN;
break;
case IDMAC_IC_7:
mask = IC_CONF_RWS_EN | IC_CONF_PRPENC_EN;
break;
default:
return;
}
ic_conf = idmac_read_icreg(ipu, IC_CONF) | mask;
idmac_write_icreg(ipu, ic_conf, IC_CONF);
}
static void ipu_ic_disable_task(struct ipu *ipu, enum ipu_channel channel)
{
uint32_t ic_conf, mask;
switch (channel) {
case IDMAC_IC_0:
mask = IC_CONF_PRPENC_EN;
break;
case IDMAC_IC_7:
mask = IC_CONF_RWS_EN | IC_CONF_PRPENC_EN;
break;
default:
return;
}
ic_conf = idmac_read_icreg(ipu, IC_CONF) & ~mask;
idmac_write_icreg(ipu, ic_conf, IC_CONF);
}
static uint32_t ipu_channel_status(struct ipu *ipu, enum ipu_channel channel)
{
uint32_t stat = TASK_STAT_IDLE;
uint32_t task_stat_reg = idmac_read_ipureg(ipu, IPU_TASKS_STAT);
switch (channel) {
case IDMAC_IC_7:
stat = (task_stat_reg & TSTAT_CSI2MEM_MASK) >>
TSTAT_CSI2MEM_OFFSET;
break;
case IDMAC_IC_0:
case IDMAC_SDC_0:
case IDMAC_SDC_1:
default:
break;
}
return stat;
}
struct chan_param_mem_planar {
/* Word 0 */
u32 xv:10;
u32 yv:10;
u32 xb:12;
u32 yb:12;
u32 res1:2;
u32 nsb:1;
u32 lnpb:6;
u32 ubo_l:11;
u32 ubo_h:15;
u32 vbo_l:17;
u32 vbo_h:9;
u32 res2:3;
u32 fw:12;
u32 fh_l:8;
u32 fh_h:4;
u32 res3:28;
/* Word 1 */
u32 eba0;
u32 eba1;
u32 bpp:3;
u32 sl:14;
u32 pfs:3;
u32 bam:3;
u32 res4:2;
u32 npb:6;
u32 res5:1;
u32 sat:2;
u32 res6:30;
} __attribute__ ((packed));
struct chan_param_mem_interleaved {
/* Word 0 */
u32 xv:10;
u32 yv:10;
u32 xb:12;
u32 yb:12;
u32 sce:1;
u32 res1:1;
u32 nsb:1;
u32 lnpb:6;
u32 sx:10;
u32 sy_l:1;
u32 sy_h:9;
u32 ns:10;
u32 sm:10;
u32 sdx_l:3;
u32 sdx_h:2;
u32 sdy:5;
u32 sdrx:1;
u32 sdry:1;
u32 sdr1:1;
u32 res2:2;
u32 fw:12;
u32 fh_l:8;
u32 fh_h:4;
u32 res3:28;
/* Word 1 */
u32 eba0;
u32 eba1;
u32 bpp:3;
u32 sl:14;
u32 pfs:3;
u32 bam:3;
u32 res4:2;
u32 npb:6;
u32 res5:1;
u32 sat:2;
u32 scc:1;
u32 ofs0:5;
u32 ofs1:5;
u32 ofs2:5;
u32 ofs3:5;
u32 wid0:3;
u32 wid1:3;
u32 wid2:3;
u32 wid3:3;
u32 dec_sel:1;
u32 res6:28;
} __attribute__ ((packed));
union chan_param_mem {
struct chan_param_mem_planar pp;
struct chan_param_mem_interleaved ip;
};
static void ipu_ch_param_set_plane_offset(union chan_param_mem *params,
u32 u_offset, u32 v_offset)
{
params->pp.ubo_l = u_offset & 0x7ff;
params->pp.ubo_h = u_offset >> 11;
params->pp.vbo_l = v_offset & 0x1ffff;
params->pp.vbo_h = v_offset >> 17;
}
static void ipu_ch_param_set_size(union chan_param_mem *params,
uint32_t pixel_fmt, uint16_t width,
uint16_t height, uint16_t stride)
{
u32 u_offset;
u32 v_offset;
params->pp.fw = width - 1;
params->pp.fh_l = height - 1;
params->pp.fh_h = (height - 1) >> 8;
params->pp.sl = stride - 1;
switch (pixel_fmt) {
case IPU_PIX_FMT_GENERIC:
/*Represents 8-bit Generic data */
params->pp.bpp = 3;
params->pp.pfs = 7;
params->pp.npb = 31;
params->pp.sat = 2; /* SAT = use 32-bit access */
break;
case IPU_PIX_FMT_GENERIC_32:
/*Represents 32-bit Generic data */
params->pp.bpp = 0;
params->pp.pfs = 7;
params->pp.npb = 7;
params->pp.sat = 2; /* SAT = use 32-bit access */
break;
case IPU_PIX_FMT_RGB565:
params->ip.bpp = 2;
params->ip.pfs = 4;
params->ip.npb = 7;
params->ip.sat = 2; /* SAT = 32-bit access */
params->ip.ofs0 = 0; /* Red bit offset */
params->ip.ofs1 = 5; /* Green bit offset */
params->ip.ofs2 = 11; /* Blue bit offset */
params->ip.ofs3 = 16; /* Alpha bit offset */
params->ip.wid0 = 4; /* Red bit width - 1 */
params->ip.wid1 = 5; /* Green bit width - 1 */
params->ip.wid2 = 4; /* Blue bit width - 1 */
break;
case IPU_PIX_FMT_BGR24:
params->ip.bpp = 1; /* 24 BPP & RGB PFS */
params->ip.pfs = 4;
params->ip.npb = 7;
params->ip.sat = 2; /* SAT = 32-bit access */
params->ip.ofs0 = 0; /* Red bit offset */
params->ip.ofs1 = 8; /* Green bit offset */
params->ip.ofs2 = 16; /* Blue bit offset */
params->ip.ofs3 = 24; /* Alpha bit offset */
params->ip.wid0 = 7; /* Red bit width - 1 */
params->ip.wid1 = 7; /* Green bit width - 1 */
params->ip.wid2 = 7; /* Blue bit width - 1 */
break;
case IPU_PIX_FMT_RGB24:
params->ip.bpp = 1; /* 24 BPP & RGB PFS */
params->ip.pfs = 4;
params->ip.npb = 7;
params->ip.sat = 2; /* SAT = 32-bit access */
params->ip.ofs0 = 16; /* Red bit offset */
params->ip.ofs1 = 8; /* Green bit offset */
params->ip.ofs2 = 0; /* Blue bit offset */
params->ip.ofs3 = 24; /* Alpha bit offset */
params->ip.wid0 = 7; /* Red bit width - 1 */
params->ip.wid1 = 7; /* Green bit width - 1 */
params->ip.wid2 = 7; /* Blue bit width - 1 */
break;
case IPU_PIX_FMT_BGRA32:
case IPU_PIX_FMT_BGR32:
params->ip.bpp = 0;
params->ip.pfs = 4;
params->ip.npb = 7;
params->ip.sat = 2; /* SAT = 32-bit access */
params->ip.ofs0 = 8; /* Red bit offset */
params->ip.ofs1 = 16; /* Green bit offset */
params->ip.ofs2 = 24; /* Blue bit offset */
params->ip.ofs3 = 0; /* Alpha bit offset */
params->ip.wid0 = 7; /* Red bit width - 1 */
params->ip.wid1 = 7; /* Green bit width - 1 */
params->ip.wid2 = 7; /* Blue bit width - 1 */
params->ip.wid3 = 7; /* Alpha bit width - 1 */
break;
case IPU_PIX_FMT_RGBA32:
case IPU_PIX_FMT_RGB32:
params->ip.bpp = 0;
params->ip.pfs = 4;
params->ip.npb = 7;
params->ip.sat = 2; /* SAT = 32-bit access */
params->ip.ofs0 = 24; /* Red bit offset */
params->ip.ofs1 = 16; /* Green bit offset */
params->ip.ofs2 = 8; /* Blue bit offset */
params->ip.ofs3 = 0; /* Alpha bit offset */
params->ip.wid0 = 7; /* Red bit width - 1 */
params->ip.wid1 = 7; /* Green bit width - 1 */
params->ip.wid2 = 7; /* Blue bit width - 1 */
params->ip.wid3 = 7; /* Alpha bit width - 1 */
break;
case IPU_PIX_FMT_ABGR32:
params->ip.bpp = 0;
params->ip.pfs = 4;
params->ip.npb = 7;
params->ip.sat = 2; /* SAT = 32-bit access */
params->ip.ofs0 = 8; /* Red bit offset */
params->ip.ofs1 = 16; /* Green bit offset */
params->ip.ofs2 = 24; /* Blue bit offset */
params->ip.ofs3 = 0; /* Alpha bit offset */
params->ip.wid0 = 7; /* Red bit width - 1 */
params->ip.wid1 = 7; /* Green bit width - 1 */
params->ip.wid2 = 7; /* Blue bit width - 1 */
params->ip.wid3 = 7; /* Alpha bit width - 1 */
break;
case IPU_PIX_FMT_UYVY:
params->ip.bpp = 2;
params->ip.pfs = 6;
params->ip.npb = 7;
params->ip.sat = 2; /* SAT = 32-bit access */
break;
case IPU_PIX_FMT_YUV420P2:
case IPU_PIX_FMT_YUV420P:
params->ip.bpp = 3;
params->ip.pfs = 3;
params->ip.npb = 7;
params->ip.sat = 2; /* SAT = 32-bit access */
u_offset = stride * height;
v_offset = u_offset + u_offset / 4;
ipu_ch_param_set_plane_offset(params, u_offset, v_offset);
break;
case IPU_PIX_FMT_YVU422P:
params->ip.bpp = 3;
params->ip.pfs = 2;
params->ip.npb = 7;
params->ip.sat = 2; /* SAT = 32-bit access */
v_offset = stride * height;
u_offset = v_offset + v_offset / 2;
ipu_ch_param_set_plane_offset(params, u_offset, v_offset);
break;
case IPU_PIX_FMT_YUV422P:
params->ip.bpp = 3;
params->ip.pfs = 2;
params->ip.npb = 7;
params->ip.sat = 2; /* SAT = 32-bit access */
u_offset = stride * height;
v_offset = u_offset + u_offset / 2;
ipu_ch_param_set_plane_offset(params, u_offset, v_offset);
break;
default:
dev_err(ipu_data.dev,
"mxc ipu: unimplemented pixel format %d\n", pixel_fmt);
break;
}
params->pp.nsb = 1;
}
static void ipu_ch_param_set_burst_size(union chan_param_mem *params,
uint16_t burst_pixels)
{
params->pp.npb = burst_pixels - 1;
};
static void ipu_ch_param_set_buffer(union chan_param_mem *params,
dma_addr_t buf0, dma_addr_t buf1)
{
params->pp.eba0 = buf0;
params->pp.eba1 = buf1;
};
static void ipu_ch_param_set_rotation(union chan_param_mem *params,
enum ipu_rotate_mode rotate)
{
params->pp.bam = rotate;
};
static void ipu_write_param_mem(uint32_t addr, uint32_t *data,
uint32_t num_words)
{
for (; num_words > 0; num_words--) {
dev_dbg(ipu_data.dev,
"write param mem - addr = 0x%08X, data = 0x%08X\n",
addr, *data);
idmac_write_ipureg(&ipu_data, addr, IPU_IMA_ADDR);
idmac_write_ipureg(&ipu_data, *data++, IPU_IMA_DATA);
addr++;
if ((addr & 0x7) == 5) {
addr &= ~0x7; /* set to word 0 */
addr += 8; /* increment to next row */
}
}
}
static int calc_resize_coeffs(uint32_t in_size, uint32_t out_size,
uint32_t *resize_coeff,
uint32_t *downsize_coeff)
{
uint32_t temp_size;
uint32_t temp_downsize;
*resize_coeff = 1 << 13;
*downsize_coeff = 1 << 13;
/* Cannot downsize more than 8:1 */
if (out_size << 3 < in_size)
return -EINVAL;
/* compute downsizing coefficient */
temp_downsize = 0;
temp_size = in_size;
while (temp_size >= out_size * 2 && temp_downsize < 2) {
temp_size >>= 1;
temp_downsize++;
}
*downsize_coeff = temp_downsize;
/*
* compute resizing coefficient using the following formula:
* resize_coeff = M*(SI -1)/(SO - 1)
* where M = 2^13, SI - input size, SO - output size
*/
*resize_coeff = (8192L * (temp_size - 1)) / (out_size - 1);
if (*resize_coeff >= 16384L) {
dev_err(ipu_data.dev, "Warning! Overflow on resize coeff.\n");
*resize_coeff = 0x3FFF;
}
dev_dbg(ipu_data.dev, "resizing from %u -> %u pixels, "
"downsize=%u, resize=%u.%lu (reg=%u)\n", in_size, out_size,
*downsize_coeff, *resize_coeff >= 8192L ? 1 : 0,
((*resize_coeff & 0x1FFF) * 10000L) / 8192L, *resize_coeff);
return 0;
}
static enum ipu_color_space format_to_colorspace(enum pixel_fmt fmt)
{
switch (fmt) {
case IPU_PIX_FMT_RGB565:
case IPU_PIX_FMT_BGR24:
case IPU_PIX_FMT_RGB24:
case IPU_PIX_FMT_BGR32:
case IPU_PIX_FMT_RGB32:
return IPU_COLORSPACE_RGB;
default:
return IPU_COLORSPACE_YCBCR;
}
}
static int ipu_ic_init_prpenc(struct ipu *ipu,
union ipu_channel_param *params, bool src_is_csi)
{
uint32_t reg, ic_conf;
uint32_t downsize_coeff, resize_coeff;
enum ipu_color_space in_fmt, out_fmt;
/* Setup vertical resizing */
calc_resize_coeffs(params->video.in_height,
params->video.out_height,
&resize_coeff, &downsize_coeff);
reg = (downsize_coeff << 30) | (resize_coeff << 16);
/* Setup horizontal resizing */
calc_resize_coeffs(params->video.in_width,
params->video.out_width,
&resize_coeff, &downsize_coeff);
reg |= (downsize_coeff << 14) | resize_coeff;
/* Setup color space conversion */
in_fmt = format_to_colorspace(params->video.in_pixel_fmt);
out_fmt = format_to_colorspace(params->video.out_pixel_fmt);
/*
* Colourspace conversion unsupported yet - see _init_csc() in
* Freescale sources
*/
if (in_fmt != out_fmt) {
dev_err(ipu->dev, "Colourspace conversion unsupported!\n");
return -EOPNOTSUPP;
}
idmac_write_icreg(ipu, reg, IC_PRP_ENC_RSC);
ic_conf = idmac_read_icreg(ipu, IC_CONF);
if (src_is_csi)
ic_conf &= ~IC_CONF_RWS_EN;
else
ic_conf |= IC_CONF_RWS_EN;
idmac_write_icreg(ipu, ic_conf, IC_CONF);
return 0;
}
static uint32_t dma_param_addr(uint32_t dma_ch)
{
/* Channel Parameter Memory */
return 0x10000 | (dma_ch << 4);
};
static void ipu_channel_set_priority(struct ipu *ipu, enum ipu_channel channel,
bool prio)
{
u32 reg = idmac_read_icreg(ipu, IDMAC_CHA_PRI);
if (prio)
reg |= 1UL << channel;
else
reg &= ~(1UL << channel);
idmac_write_icreg(ipu, reg, IDMAC_CHA_PRI);
dump_idmac_reg(ipu);
}
static uint32_t ipu_channel_conf_mask(enum ipu_channel channel)
{
uint32_t mask;
switch (channel) {
case IDMAC_IC_0:
case IDMAC_IC_7:
mask = IPU_CONF_CSI_EN | IPU_CONF_IC_EN;
break;
case IDMAC_SDC_0:
case IDMAC_SDC_1:
mask = IPU_CONF_SDC_EN | IPU_CONF_DI_EN;
break;
default:
mask = 0;
break;
}
return mask;
}
/**
* ipu_enable_channel() - enable an IPU channel.
* @channel: channel ID.
* @return: 0 on success or negative error code on failure.
*/
static int ipu_enable_channel(struct idmac *idmac, struct idmac_channel *ichan)
{
struct ipu *ipu = to_ipu(idmac);
enum ipu_channel channel = ichan->dma_chan.chan_id;
uint32_t reg;
unsigned long flags;
spin_lock_irqsave(&ipu->lock, flags);
/* Reset to buffer 0 */
idmac_write_ipureg(ipu, 1UL << channel, IPU_CHA_CUR_BUF);
ichan->active_buffer = 0;
ichan->status = IPU_CHANNEL_ENABLED;
switch (channel) {
case IDMAC_SDC_0:
case IDMAC_SDC_1:
case IDMAC_IC_7:
ipu_channel_set_priority(ipu, channel, true);
default:
break;
}
reg = idmac_read_icreg(ipu, IDMAC_CHA_EN);
idmac_write_icreg(ipu, reg | (1UL << channel), IDMAC_CHA_EN);
ipu_ic_enable_task(ipu, channel);
spin_unlock_irqrestore(&ipu->lock, flags);
return 0;
}
/**
* ipu_init_channel_buffer() - initialize a buffer for logical IPU channel.
* @channel: channel ID.
* @pixel_fmt: pixel format of buffer. Pixel format is a FOURCC ASCII code.
* @width: width of buffer in pixels.
* @height: height of buffer in pixels.
* @stride: stride length of buffer in pixels.
* @rot_mode: rotation mode of buffer. A rotation setting other than
* IPU_ROTATE_VERT_FLIP should only be used for input buffers of
* rotation channels.
* @phyaddr_0: buffer 0 physical address.
* @phyaddr_1: buffer 1 physical address. Setting this to a value other than
* NULL enables double buffering mode.
* @return: 0 on success or negative error code on failure.
*/
static int ipu_init_channel_buffer(struct idmac_channel *ichan,
enum pixel_fmt pixel_fmt,
uint16_t width, uint16_t height,
uint32_t stride,
enum ipu_rotate_mode rot_mode,
dma_addr_t phyaddr_0, dma_addr_t phyaddr_1)
{
enum ipu_channel channel = ichan->dma_chan.chan_id;
struct idmac *idmac = to_idmac(ichan->dma_chan.device);
struct ipu *ipu = to_ipu(idmac);
union chan_param_mem params = {};
unsigned long flags;
uint32_t reg;
uint32_t stride_bytes;
stride_bytes = stride * bytes_per_pixel(pixel_fmt);
if (stride_bytes % 4) {
dev_err(ipu->dev,
"Stride length must be 32-bit aligned, stride = %d, bytes = %d\n",
stride, stride_bytes);
return -EINVAL;
}
/* IC channel's stride must be a multiple of 8 pixels */
if ((channel <= 13) && (stride % 8)) {
dev_err(ipu->dev, "Stride must be 8 pixel multiple\n");
return -EINVAL;
}
/* Build parameter memory data for DMA channel */
ipu_ch_param_set_size(&params, pixel_fmt, width, height, stride_bytes);
ipu_ch_param_set_buffer(&params, phyaddr_0, phyaddr_1);
ipu_ch_param_set_rotation(&params, rot_mode);
/* Some channels (rotation) have restriction on burst length */
switch (channel) {
case IDMAC_IC_7: /* Hangs with burst 8, 16, other values
invalid - Table 44-30 */
/*
ipu_ch_param_set_burst_size(&params, 8);
*/
break;
case IDMAC_SDC_0:
case IDMAC_SDC_1:
/* In original code only IPU_PIX_FMT_RGB565 was setting burst */
ipu_ch_param_set_burst_size(&params, 16);
break;
case IDMAC_IC_0:
default:
break;
}
spin_lock_irqsave(&ipu->lock, flags);
ipu_write_param_mem(dma_param_addr(channel), (uint32_t *)&params, 10);
reg = idmac_read_ipureg(ipu, IPU_CHA_DB_MODE_SEL);
if (phyaddr_1)
reg |= 1UL << channel;
else
reg &= ~(1UL << channel);
idmac_write_ipureg(ipu, reg, IPU_CHA_DB_MODE_SEL);
ichan->status = IPU_CHANNEL_READY;
spin_unlock_irqrestore(ipu->lock, flags);
return 0;
}
/**
* ipu_select_buffer() - mark a channel's buffer as ready.
* @channel: channel ID.
* @buffer_n: buffer number to mark ready.
*/
static void ipu_select_buffer(enum ipu_channel channel, int buffer_n)
{
/* No locking - this is a write-one-to-set register, cleared by IPU */
if (buffer_n == 0)
/* Mark buffer 0 as ready. */
idmac_write_ipureg(&ipu_data, 1UL << channel, IPU_CHA_BUF0_RDY);
else
/* Mark buffer 1 as ready. */
idmac_write_ipureg(&ipu_data, 1UL << channel, IPU_CHA_BUF1_RDY);
}
/**
* ipu_update_channel_buffer() - update physical address of a channel buffer.
* @channel: channel ID.
* @buffer_n: buffer number to update.
* 0 or 1 are the only valid values.
* @phyaddr: buffer physical address.
* @return: Returns 0 on success or negative error code on failure. This
* function will fail if the buffer is set to ready.
*/
/* Called under spin_lock(_irqsave)(&ichan->lock) */
static int ipu_update_channel_buffer(enum ipu_channel channel,
int buffer_n, dma_addr_t phyaddr)
{
uint32_t reg;
unsigned long flags;
spin_lock_irqsave(&ipu_data.lock, flags);
if (buffer_n == 0) {
reg = idmac_read_ipureg(&ipu_data, IPU_CHA_BUF0_RDY);
if (reg & (1UL << channel)) {
spin_unlock_irqrestore(&ipu_data.lock, flags);
return -EACCES;
}
/* 44.3.3.1.9 - Row Number 1 (WORD1, offset 0) */
idmac_write_ipureg(&ipu_data, dma_param_addr(channel) +
0x0008UL, IPU_IMA_ADDR);
idmac_write_ipureg(&ipu_data, phyaddr, IPU_IMA_DATA);
} else {
reg = idmac_read_ipureg(&ipu_data, IPU_CHA_BUF1_RDY);
if (reg & (1UL << channel)) {
spin_unlock_irqrestore(&ipu_data.lock, flags);
return -EACCES;
}
/* Check if double-buffering is already enabled */
reg = idmac_read_ipureg(&ipu_data, IPU_CHA_DB_MODE_SEL);
if (!(reg & (1UL << channel)))
idmac_write_ipureg(&ipu_data, reg | (1UL << channel),
IPU_CHA_DB_MODE_SEL);
/* 44.3.3.1.9 - Row Number 1 (WORD1, offset 1) */
idmac_write_ipureg(&ipu_data, dma_param_addr(channel) +
0x0009UL, IPU_IMA_ADDR);
idmac_write_ipureg(&ipu_data, phyaddr, IPU_IMA_DATA);
}
spin_unlock_irqrestore(&ipu_data.lock, flags);
return 0;
}
/* Called under spin_lock_irqsave(&ichan->lock) */
static int ipu_submit_channel_buffers(struct idmac_channel *ichan,
struct idmac_tx_desc *desc)
{
struct scatterlist *sg;
int i, ret = 0;
for (i = 0, sg = desc->sg; i < 2 && sg; i++) {
if (!ichan->sg[i]) {
ichan->sg[i] = sg;
/*
* On first invocation this shouldn't be necessary, the
* call to ipu_init_channel_buffer() above will set
* addresses for us, so we could make it conditional
* on status >= IPU_CHANNEL_ENABLED, but doing it again
* shouldn't hurt either.
*/
ret = ipu_update_channel_buffer(ichan->dma_chan.chan_id, i,
sg_dma_address(sg));
if (ret < 0)
return ret;
ipu_select_buffer(ichan->dma_chan.chan_id, i);
sg = sg_next(sg);
}
}
return ret;
}
static dma_cookie_t idmac_tx_submit(struct dma_async_tx_descriptor *tx)
{
struct idmac_tx_desc *desc = to_tx_desc(tx);
struct idmac_channel *ichan = to_idmac_chan(tx->chan);
struct idmac *idmac = to_idmac(tx->chan->device);
struct ipu *ipu = to_ipu(idmac);
dma_cookie_t cookie;
unsigned long flags;
/* Sanity check */
if (!list_empty(&desc->list)) {
/* The descriptor doesn't belong to client */
dev_err(&ichan->dma_chan.dev->device,
"Descriptor %p not prepared!\n", tx);
return -EBUSY;
}
mutex_lock(&ichan->chan_mutex);
if (ichan->status < IPU_CHANNEL_READY) {
struct idmac_video_param *video = &ichan->params.video;
/*
* Initial buffer assignment - the first two sg-entries from
* the descriptor will end up in the IDMAC buffers
*/
dma_addr_t dma_1 = sg_is_last(desc->sg) ? 0 :
sg_dma_address(&desc->sg[1]);
WARN_ON(ichan->sg[0] || ichan->sg[1]);
cookie = ipu_init_channel_buffer(ichan,
video->out_pixel_fmt,
video->out_width,
video->out_height,
video->out_stride,
IPU_ROTATE_NONE,
sg_dma_address(&desc->sg[0]),
dma_1);
if (cookie < 0)
goto out;
}
/* ipu->lock can be taken under ichan->lock, but not v.v. */
spin_lock_irqsave(&ichan->lock, flags);
/* submit_buffers() atomically verifies and fills empty sg slots */
cookie = ipu_submit_channel_buffers(ichan, desc);
spin_unlock_irqrestore(&ichan->lock, flags);
if (cookie < 0)
goto out;
cookie = ichan->dma_chan.cookie;
if (++cookie < 0)
cookie = 1;
/* from dmaengine.h: "last cookie value returned to client" */
ichan->dma_chan.cookie = cookie;
tx->cookie = cookie;
spin_lock_irqsave(&ichan->lock, flags);
list_add_tail(&desc->list, &ichan->queue);
spin_unlock_irqrestore(&ichan->lock, flags);
if (ichan->status < IPU_CHANNEL_ENABLED) {
int ret = ipu_enable_channel(idmac, ichan);
if (ret < 0) {
cookie = ret;
spin_lock_irqsave(&ichan->lock, flags);
list_del_init(&desc->list);
spin_unlock_irqrestore(&ichan->lock, flags);
tx->cookie = cookie;
ichan->dma_chan.cookie = cookie;
}
}
dump_idmac_reg(ipu);
out:
mutex_unlock(&ichan->chan_mutex);
return cookie;
}
/* Called with ichan->chan_mutex held */
static int idmac_desc_alloc(struct idmac_channel *ichan, int n)
{
struct idmac_tx_desc *desc = vmalloc(n * sizeof(struct idmac_tx_desc));
struct idmac *idmac = to_idmac(ichan->dma_chan.device);
if (!desc)
return -ENOMEM;
/* No interrupts, just disable the tasklet for a moment */
tasklet_disable(&to_ipu(idmac)->tasklet);
ichan->n_tx_desc = n;
ichan->desc = desc;
INIT_LIST_HEAD(&ichan->queue);
INIT_LIST_HEAD(&ichan->free_list);
while (n--) {
struct dma_async_tx_descriptor *txd = &desc->txd;
memset(txd, 0, sizeof(*txd));
dma_async_tx_descriptor_init(txd, &ichan->dma_chan);
txd->tx_submit = idmac_tx_submit;
txd->chan = &ichan->dma_chan;
INIT_LIST_HEAD(&txd->tx_list);
list_add(&desc->list, &ichan->free_list);
desc++;
}
tasklet_enable(&to_ipu(idmac)->tasklet);
return 0;
}
/**
* ipu_init_channel() - initialize an IPU channel.
* @idmac: IPU DMAC context.
* @ichan: pointer to the channel object.
* @return 0 on success or negative error code on failure.
*/
static int ipu_init_channel(struct idmac *idmac, struct idmac_channel *ichan)
{
union ipu_channel_param *params = &ichan->params;
uint32_t ipu_conf;
enum ipu_channel channel = ichan->dma_chan.chan_id;
unsigned long flags;
uint32_t reg;
struct ipu *ipu = to_ipu(idmac);
int ret = 0, n_desc = 0;
dev_dbg(ipu->dev, "init channel = %d\n", channel);
if (channel != IDMAC_SDC_0 && channel != IDMAC_SDC_1 &&
channel != IDMAC_IC_7)
return -EINVAL;
spin_lock_irqsave(&ipu->lock, flags);
switch (channel) {
case IDMAC_IC_7:
n_desc = 16;
reg = idmac_read_icreg(ipu, IC_CONF);
idmac_write_icreg(ipu, reg & ~IC_CONF_CSI_MEM_WR_EN, IC_CONF);
break;
case IDMAC_IC_0:
n_desc = 16;
reg = idmac_read_ipureg(ipu, IPU_FS_PROC_FLOW);
idmac_write_ipureg(ipu, reg & ~FS_ENC_IN_VALID, IPU_FS_PROC_FLOW);
ret = ipu_ic_init_prpenc(ipu, params, true);
break;
case IDMAC_SDC_0:
case IDMAC_SDC_1:
n_desc = 4;
default:
break;
}
ipu->channel_init_mask |= 1L << channel;
/* Enable IPU sub module */
ipu_conf = idmac_read_ipureg(ipu, IPU_CONF) |
ipu_channel_conf_mask(channel);
idmac_write_ipureg(ipu, ipu_conf, IPU_CONF);
spin_unlock_irqrestore(&ipu->lock, flags);
if (n_desc && !ichan->desc)
ret = idmac_desc_alloc(ichan, n_desc);
dump_idmac_reg(ipu);
return ret;
}
/**
* ipu_uninit_channel() - uninitialize an IPU channel.
* @idmac: IPU DMAC context.
* @ichan: pointer to the channel object.
*/
static void ipu_uninit_channel(struct idmac *idmac, struct idmac_channel *ichan)
{
enum ipu_channel channel = ichan->dma_chan.chan_id;
unsigned long flags;
uint32_t reg;
unsigned long chan_mask = 1UL << channel;
uint32_t ipu_conf;
struct ipu *ipu = to_ipu(idmac);
spin_lock_irqsave(&ipu->lock, flags);
if (!(ipu->channel_init_mask & chan_mask)) {
dev_err(ipu->dev, "Channel already uninitialized %d\n",
channel);
spin_unlock_irqrestore(&ipu->lock, flags);
return;
}
/* Reset the double buffer */
reg = idmac_read_ipureg(ipu, IPU_CHA_DB_MODE_SEL);
idmac_write_ipureg(ipu, reg & ~chan_mask, IPU_CHA_DB_MODE_SEL);
ichan->sec_chan_en = false;
switch (channel) {
case IDMAC_IC_7:
reg = idmac_read_icreg(ipu, IC_CONF);
idmac_write_icreg(ipu, reg & ~(IC_CONF_RWS_EN | IC_CONF_PRPENC_EN),
IC_CONF);
break;
case IDMAC_IC_0:
reg = idmac_read_icreg(ipu, IC_CONF);
idmac_write_icreg(ipu, reg & ~(IC_CONF_PRPENC_EN | IC_CONF_PRPENC_CSC1),
IC_CONF);
break;
case IDMAC_SDC_0:
case IDMAC_SDC_1:
default:
break;
}
ipu->channel_init_mask &= ~(1L << channel);
ipu_conf = idmac_read_ipureg(ipu, IPU_CONF) &
~ipu_channel_conf_mask(channel);
idmac_write_ipureg(ipu, ipu_conf, IPU_CONF);
spin_unlock_irqrestore(&ipu->lock, flags);
ichan->n_tx_desc = 0;
vfree(ichan->desc);
ichan->desc = NULL;
}
/**
* ipu_disable_channel() - disable an IPU channel.
* @idmac: IPU DMAC context.
* @ichan: channel object pointer.
* @wait_for_stop: flag to set whether to wait for channel end of frame or
* return immediately.
* @return: 0 on success or negative error code on failure.
*/
static int ipu_disable_channel(struct idmac *idmac, struct idmac_channel *ichan,
bool wait_for_stop)
{
enum ipu_channel channel = ichan->dma_chan.chan_id;
struct ipu *ipu = to_ipu(idmac);
uint32_t reg;
unsigned long flags;
unsigned long chan_mask = 1UL << channel;
unsigned int timeout;
if (wait_for_stop && channel != IDMAC_SDC_1 && channel != IDMAC_SDC_0) {
timeout = 40;
/* This waiting always fails. Related to spurious irq problem */
while ((idmac_read_icreg(ipu, IDMAC_CHA_BUSY) & chan_mask) ||
(ipu_channel_status(ipu, channel) == TASK_STAT_ACTIVE)) {
timeout--;
msleep(10);
if (!timeout) {
dev_dbg(ipu->dev,
"Warning: timeout waiting for channel %u to "
"stop: buf0_rdy = 0x%08X, buf1_rdy = 0x%08X, "
"busy = 0x%08X, tstat = 0x%08X\n", channel,
idmac_read_ipureg(ipu, IPU_CHA_BUF0_RDY),
idmac_read_ipureg(ipu, IPU_CHA_BUF1_RDY),
idmac_read_icreg(ipu, IDMAC_CHA_BUSY),
idmac_read_ipureg(ipu, IPU_TASKS_STAT));
break;
}
}
dev_dbg(ipu->dev, "timeout = %d * 10ms\n", 40 - timeout);
}
/* SDC BG and FG must be disabled before DMA is disabled */
if (wait_for_stop && (channel == IDMAC_SDC_0 ||
channel == IDMAC_SDC_1)) {
for (timeout = 5;
timeout && !ipu_irq_status(ichan->eof_irq); timeout--)
msleep(5);
}
spin_lock_irqsave(&ipu->lock, flags);
/* Disable IC task */
ipu_ic_disable_task(ipu, channel);
/* Disable DMA channel(s) */
reg = idmac_read_icreg(ipu, IDMAC_CHA_EN);
idmac_write_icreg(ipu, reg & ~chan_mask, IDMAC_CHA_EN);
/*
* Problem (observed with channel DMAIC_7): after enabling the channel
* and initialising buffers, there comes an interrupt with current still
* pointing at buffer 0, whereas it should use buffer 0 first and only
* generate an interrupt when it is done, then current should already
* point to buffer 1. This spurious interrupt also comes on channel
* DMASDC_0. With DMAIC_7 normally, is we just leave the ISR after the
* first interrupt, there comes the second with current correctly
* pointing to buffer 1 this time. But sometimes this second interrupt
* doesn't come and the channel hangs. Clearing BUFx_RDY when disabling
* the channel seems to prevent the channel from hanging, but it doesn't
* prevent the spurious interrupt. This might also be unsafe. Think
* about the IDMAC controller trying to switch to a buffer, when we
* clear the ready bit, and re-enable it a moment later.
*/
reg = idmac_read_ipureg(ipu, IPU_CHA_BUF0_RDY);
idmac_write_ipureg(ipu, 0, IPU_CHA_BUF0_RDY);
idmac_write_ipureg(ipu, reg & ~(1UL << channel), IPU_CHA_BUF0_RDY);
reg = idmac_read_ipureg(ipu, IPU_CHA_BUF1_RDY);
idmac_write_ipureg(ipu, 0, IPU_CHA_BUF1_RDY);
idmac_write_ipureg(ipu, reg & ~(1UL << channel), IPU_CHA_BUF1_RDY);
spin_unlock_irqrestore(&ipu->lock, flags);
return 0;
}
/*
* We have several possibilities here:
* current BUF next BUF
*
* not last sg next not last sg
* not last sg next last sg
* last sg first sg from next descriptor
* last sg NULL
*
* Besides, the descriptor queue might be empty or not. We process all these
* cases carefully.
*/
static irqreturn_t idmac_interrupt(int irq, void *dev_id)
{
struct idmac_channel *ichan = dev_id;
unsigned int chan_id = ichan->dma_chan.chan_id;
struct scatterlist **sg, *sgnext, *sgnew = NULL;
/* Next transfer descriptor */
struct idmac_tx_desc *desc = NULL, *descnew;
dma_async_tx_callback callback;
void *callback_param;
bool done = false;
u32 ready0 = idmac_read_ipureg(&ipu_data, IPU_CHA_BUF0_RDY),
ready1 = idmac_read_ipureg(&ipu_data, IPU_CHA_BUF1_RDY),
curbuf = idmac_read_ipureg(&ipu_data, IPU_CHA_CUR_BUF);
/* IDMAC has cleared the respective BUFx_RDY bit, we manage the buffer */
pr_debug("IDMAC irq %d\n", irq);
/* Other interrupts do not interfere with this channel */
spin_lock(&ichan->lock);
if (unlikely(chan_id != IDMAC_SDC_0 && chan_id != IDMAC_SDC_1 &&
((curbuf >> chan_id) & 1) == ichan->active_buffer)) {
int i = 100;
/* This doesn't help. See comment in ipu_disable_channel() */
while (--i) {
curbuf = idmac_read_ipureg(&ipu_data, IPU_CHA_CUR_BUF);
if (((curbuf >> chan_id) & 1) != ichan->active_buffer)
break;
cpu_relax();
}
if (!i) {
spin_unlock(&ichan->lock);
dev_dbg(ichan->dma_chan.device->dev,
"IRQ on active buffer on channel %x, active "
"%d, ready %x, %x, current %x!\n", chan_id,
ichan->active_buffer, ready0, ready1, curbuf);
return IRQ_NONE;
}
}
if (unlikely((ichan->active_buffer && (ready1 >> chan_id) & 1) ||
(!ichan->active_buffer && (ready0 >> chan_id) & 1)
)) {
spin_unlock(&ichan->lock);
dev_dbg(ichan->dma_chan.device->dev,
"IRQ with active buffer still ready on channel %x, "
"active %d, ready %x, %x!\n", chan_id,
ichan->active_buffer, ready0, ready1);
return IRQ_NONE;
}
if (unlikely(list_empty(&ichan->queue))) {
spin_unlock(&ichan->lock);
dev_err(ichan->dma_chan.device->dev,
"IRQ without queued buffers on channel %x, active %d, "
"ready %x, %x!\n", chan_id,
ichan->active_buffer, ready0, ready1);
return IRQ_NONE;
}
/*
* active_buffer is a software flag, it shows which buffer we are
* currently expecting back from the hardware, IDMAC should be
* processing the other buffer already
*/
sg = &ichan->sg[ichan->active_buffer];
sgnext = ichan->sg[!ichan->active_buffer];
/*
* if sgnext == NULL sg must be the last element in a scatterlist and
* queue must be empty
*/
if (unlikely(!sgnext)) {
if (unlikely(sg_next(*sg))) {
dev_err(ichan->dma_chan.device->dev,
"Broken buffer-update locking on channel %x!\n",
chan_id);
/* We'll let the user catch up */
} else {
/* Underrun */
ipu_ic_disable_task(&ipu_data, chan_id);
dev_dbg(ichan->dma_chan.device->dev,
"Underrun on channel %x\n", chan_id);
ichan->status = IPU_CHANNEL_READY;
/* Continue to check for complete descriptor */
}
}
desc = list_entry(ichan->queue.next, struct idmac_tx_desc, list);
/* First calculate and submit the next sg element */
if (likely(sgnext))
sgnew = sg_next(sgnext);
if (unlikely(!sgnew)) {
/* Start a new scatterlist, if any queued */
if (likely(desc->list.next != &ichan->queue)) {
descnew = list_entry(desc->list.next,
struct idmac_tx_desc, list);
sgnew = &descnew->sg[0];
}
}
if (unlikely(!sg_next(*sg)) || !sgnext) {
/*
* Last element in scatterlist done, remove from the queue,
* _init for debugging
*/
list_del_init(&desc->list);
done = true;
}
*sg = sgnew;
if (likely(sgnew)) {
int ret;
ret = ipu_update_channel_buffer(chan_id, ichan->active_buffer,
sg_dma_address(*sg));
if (ret < 0)
dev_err(ichan->dma_chan.device->dev,
"Failed to update buffer on channel %x buffer %d!\n",
chan_id, ichan->active_buffer);
else
ipu_select_buffer(chan_id, ichan->active_buffer);
}
/* Flip the active buffer - even if update above failed */
ichan->active_buffer = !ichan->active_buffer;
if (done)
ichan->completed = desc->txd.cookie;
callback = desc->txd.callback;
callback_param = desc->txd.callback_param;
spin_unlock(&ichan->lock);
if (done && (desc->txd.flags & DMA_PREP_INTERRUPT) && callback)
callback(callback_param);
return IRQ_HANDLED;
}
static void ipu_gc_tasklet(unsigned long arg)
{
struct ipu *ipu = (struct ipu *)arg;
int i;
for (i = 0; i < IPU_CHANNELS_NUM; i++) {
struct idmac_channel *ichan = ipu->channel + i;
struct idmac_tx_desc *desc;
unsigned long flags;
int j;
for (j = 0; j < ichan->n_tx_desc; j++) {
desc = ichan->desc + j;
spin_lock_irqsave(&ichan->lock, flags);
if (async_tx_test_ack(&desc->txd)) {
list_move(&desc->list, &ichan->free_list);
async_tx_clear_ack(&desc->txd);
}
spin_unlock_irqrestore(&ichan->lock, flags);
}
}
}
/*
* At the time .device_alloc_chan_resources() method is called, we cannot know,
* whether the client will accept the channel. Thus we must only check, if we
* can satisfy client's request but the only real criterion to verify, whether
* the client has accepted our offer is the client_count. That's why we have to
* perform the rest of our allocation tasks on the first call to this function.
*/
static struct dma_async_tx_descriptor *idmac_prep_slave_sg(struct dma_chan *chan,
struct scatterlist *sgl, unsigned int sg_len,
enum dma_data_direction direction, unsigned long tx_flags)
{
struct idmac_channel *ichan = to_idmac_chan(chan);
struct idmac_tx_desc *desc = NULL;
struct dma_async_tx_descriptor *txd = NULL;
unsigned long flags;
/* We only can handle these three channels so far */
if (ichan->dma_chan.chan_id != IDMAC_SDC_0 && ichan->dma_chan.chan_id != IDMAC_SDC_1 &&
ichan->dma_chan.chan_id != IDMAC_IC_7)
return NULL;
if (direction != DMA_FROM_DEVICE && direction != DMA_TO_DEVICE) {
dev_err(chan->device->dev, "Invalid DMA direction %d!\n", direction);
return NULL;
}
mutex_lock(&ichan->chan_mutex);
spin_lock_irqsave(&ichan->lock, flags);
if (!list_empty(&ichan->free_list)) {
desc = list_entry(ichan->free_list.next,
struct idmac_tx_desc, list);
list_del_init(&desc->list);
desc->sg_len = sg_len;
desc->sg = sgl;
txd = &desc->txd;
txd->flags = tx_flags;
}
spin_unlock_irqrestore(&ichan->lock, flags);
mutex_unlock(&ichan->chan_mutex);
tasklet_schedule(&to_ipu(to_idmac(chan->device))->tasklet);
return txd;
}
/* Re-select the current buffer and re-activate the channel */
static void idmac_issue_pending(struct dma_chan *chan)
{
struct idmac_channel *ichan = to_idmac_chan(chan);
struct idmac *idmac = to_idmac(chan->device);
struct ipu *ipu = to_ipu(idmac);
unsigned long flags;
/* This is not always needed, but doesn't hurt either */
spin_lock_irqsave(&ipu->lock, flags);
ipu_select_buffer(ichan->dma_chan.chan_id, ichan->active_buffer);
spin_unlock_irqrestore(&ipu->lock, flags);
/*
* Might need to perform some parts of initialisation from
* ipu_enable_channel(), but not all, we do not want to reset to buffer
* 0, don't need to set priority again either, but re-enabling the task
* and the channel might be a good idea.
*/
}
static void __idmac_terminate_all(struct dma_chan *chan)
{
struct idmac_channel *ichan = to_idmac_chan(chan);
struct idmac *idmac = to_idmac(chan->device);
unsigned long flags;
int i;
ipu_disable_channel(idmac, ichan,
ichan->status >= IPU_CHANNEL_ENABLED);
tasklet_disable(&to_ipu(idmac)->tasklet);
/* ichan->queue is modified in ISR, have to spinlock */
spin_lock_irqsave(&ichan->lock, flags);
list_splice_init(&ichan->queue, &ichan->free_list);
if (ichan->desc)
for (i = 0; i < ichan->n_tx_desc; i++) {
struct idmac_tx_desc *desc = ichan->desc + i;
if (list_empty(&desc->list))
/* Descriptor was prepared, but not submitted */
list_add(&desc->list,
&ichan->free_list);
async_tx_clear_ack(&desc->txd);
}
ichan->sg[0] = NULL;
ichan->sg[1] = NULL;
spin_unlock_irqrestore(&ichan->lock, flags);
tasklet_enable(&to_ipu(idmac)->tasklet);
ichan->status = IPU_CHANNEL_INITIALIZED;
}
static void idmac_terminate_all(struct dma_chan *chan)
{
struct idmac_channel *ichan = to_idmac_chan(chan);
mutex_lock(&ichan->chan_mutex);
__idmac_terminate_all(chan);
mutex_unlock(&ichan->chan_mutex);
}
static int idmac_alloc_chan_resources(struct dma_chan *chan)
{
struct idmac_channel *ichan = to_idmac_chan(chan);
struct idmac *idmac = to_idmac(chan->device);
int ret;
/* dmaengine.c now guarantees to only offer free channels */
BUG_ON(chan->client_count > 1);
WARN_ON(ichan->status != IPU_CHANNEL_FREE);
chan->cookie = 1;
ichan->completed = -ENXIO;
ret = ipu_irq_map(ichan->dma_chan.chan_id);
if (ret < 0)
goto eimap;
ichan->eof_irq = ret;
ret = request_irq(ichan->eof_irq, idmac_interrupt, 0,
ichan->eof_name, ichan);
if (ret < 0)
goto erirq;
ret = ipu_init_channel(idmac, ichan);
if (ret < 0)
goto eichan;
ichan->status = IPU_CHANNEL_INITIALIZED;
dev_dbg(&ichan->dma_chan.dev->device, "Found channel 0x%x, irq %d\n",
ichan->dma_chan.chan_id, ichan->eof_irq);
return ret;
eichan:
free_irq(ichan->eof_irq, ichan);
erirq:
ipu_irq_unmap(ichan->dma_chan.chan_id);
eimap:
return ret;
}
static void idmac_free_chan_resources(struct dma_chan *chan)
{
struct idmac_channel *ichan = to_idmac_chan(chan);
struct idmac *idmac = to_idmac(chan->device);
mutex_lock(&ichan->chan_mutex);
__idmac_terminate_all(chan);
if (ichan->status > IPU_CHANNEL_FREE) {
free_irq(ichan->eof_irq, ichan);
ipu_irq_unmap(ichan->dma_chan.chan_id);
}
ichan->status = IPU_CHANNEL_FREE;
ipu_uninit_channel(idmac, ichan);
mutex_unlock(&ichan->chan_mutex);
tasklet_schedule(&to_ipu(idmac)->tasklet);
}
static enum dma_status idmac_is_tx_complete(struct dma_chan *chan,
dma_cookie_t cookie, dma_cookie_t *done, dma_cookie_t *used)
{
struct idmac_channel *ichan = to_idmac_chan(chan);
if (done)
*done = ichan->completed;
if (used)
*used = chan->cookie;
if (cookie != chan->cookie)
return DMA_ERROR;
return DMA_SUCCESS;
}
static int __init ipu_idmac_init(struct ipu *ipu)
{
struct idmac *idmac = &ipu->idmac;
struct dma_device *dma = &idmac->dma;
int i;
dma_cap_set(DMA_SLAVE, dma->cap_mask);
dma_cap_set(DMA_PRIVATE, dma->cap_mask);
/* Compulsory common fields */
dma->dev = ipu->dev;
dma->device_alloc_chan_resources = idmac_alloc_chan_resources;
dma->device_free_chan_resources = idmac_free_chan_resources;
dma->device_is_tx_complete = idmac_is_tx_complete;
dma->device_issue_pending = idmac_issue_pending;
/* Compulsory for DMA_SLAVE fields */
dma->device_prep_slave_sg = idmac_prep_slave_sg;
dma->device_terminate_all = idmac_terminate_all;
INIT_LIST_HEAD(&dma->channels);
for (i = 0; i < IPU_CHANNELS_NUM; i++) {
struct idmac_channel *ichan = ipu->channel + i;
struct dma_chan *dma_chan = &ichan->dma_chan;
spin_lock_init(&ichan->lock);
mutex_init(&ichan->chan_mutex);
ichan->status = IPU_CHANNEL_FREE;
ichan->sec_chan_en = false;
ichan->completed = -ENXIO;
snprintf(ichan->eof_name, sizeof(ichan->eof_name), "IDMAC EOF %d", i);
dma_chan->device = &idmac->dma;
dma_chan->cookie = 1;
dma_chan->chan_id = i;
list_add_tail(&ichan->dma_chan.device_node, &dma->channels);
}
idmac_write_icreg(ipu, 0x00000070, IDMAC_CONF);
return dma_async_device_register(&idmac->dma);
}
static void ipu_idmac_exit(struct ipu *ipu)
{
int i;
struct idmac *idmac = &ipu->idmac;
for (i = 0; i < IPU_CHANNELS_NUM; i++) {
struct idmac_channel *ichan = ipu->channel + i;
idmac_terminate_all(&ichan->dma_chan);
idmac_prep_slave_sg(&ichan->dma_chan, NULL, 0, DMA_NONE, 0);
}
dma_async_device_unregister(&idmac->dma);
}
/*****************************************************************************
* IPU common probe / remove
*/
static int ipu_probe(struct platform_device *pdev)
{
struct ipu_platform_data *pdata = pdev->dev.platform_data;
struct resource *mem_ipu, *mem_ic;
int ret;
spin_lock_init(&ipu_data.lock);
mem_ipu = platform_get_resource(pdev, IORESOURCE_MEM, 0);
mem_ic = platform_get_resource(pdev, IORESOURCE_MEM, 1);
if (!pdata || !mem_ipu || !mem_ic)
return -EINVAL;
ipu_data.dev = &pdev->dev;
platform_set_drvdata(pdev, &ipu_data);
ret = platform_get_irq(pdev, 0);
if (ret < 0)
goto err_noirq;
ipu_data.irq_fn = ret;
ret = platform_get_irq(pdev, 1);
if (ret < 0)
goto err_noirq;
ipu_data.irq_err = ret;
ipu_data.irq_base = pdata->irq_base;
dev_dbg(&pdev->dev, "fn irq %u, err irq %u, irq-base %u\n",
ipu_data.irq_fn, ipu_data.irq_err, ipu_data.irq_base);
/* Remap IPU common registers */
ipu_data.reg_ipu = ioremap(mem_ipu->start,
mem_ipu->end - mem_ipu->start + 1);
if (!ipu_data.reg_ipu) {
ret = -ENOMEM;
goto err_ioremap_ipu;
}
/* Remap Image Converter and Image DMA Controller registers */
ipu_data.reg_ic = ioremap(mem_ic->start,
mem_ic->end - mem_ic->start + 1);
if (!ipu_data.reg_ic) {
ret = -ENOMEM;
goto err_ioremap_ic;
}
/* Get IPU clock */
ipu_data.ipu_clk = clk_get(&pdev->dev, "ipu_clk");
if (IS_ERR(ipu_data.ipu_clk)) {
ret = PTR_ERR(ipu_data.ipu_clk);
goto err_clk_get;
}
/* Make sure IPU HSP clock is running */
clk_enable(ipu_data.ipu_clk);
/* Disable all interrupts */
idmac_write_ipureg(&ipu_data, 0, IPU_INT_CTRL_1);
idmac_write_ipureg(&ipu_data, 0, IPU_INT_CTRL_2);
idmac_write_ipureg(&ipu_data, 0, IPU_INT_CTRL_3);
idmac_write_ipureg(&ipu_data, 0, IPU_INT_CTRL_4);
idmac_write_ipureg(&ipu_data, 0, IPU_INT_CTRL_5);
dev_dbg(&pdev->dev, "%s @ 0x%08lx, fn irq %u, err irq %u\n", pdev->name,
(unsigned long)mem_ipu->start, ipu_data.irq_fn, ipu_data.irq_err);
ret = ipu_irq_attach_irq(&ipu_data, pdev);
if (ret < 0)
goto err_attach_irq;
/* Initialize DMA engine */
ret = ipu_idmac_init(&ipu_data);
if (ret < 0)
goto err_idmac_init;
tasklet_init(&ipu_data.tasklet, ipu_gc_tasklet, (unsigned long)&ipu_data);
ipu_data.dev = &pdev->dev;
dev_dbg(ipu_data.dev, "IPU initialized\n");
return 0;
err_idmac_init:
err_attach_irq:
ipu_irq_detach_irq(&ipu_data, pdev);
clk_disable(ipu_data.ipu_clk);
clk_put(ipu_data.ipu_clk);
err_clk_get:
iounmap(ipu_data.reg_ic);
err_ioremap_ic:
iounmap(ipu_data.reg_ipu);
err_ioremap_ipu:
err_noirq:
dev_err(&pdev->dev, "Failed to probe IPU: %d\n", ret);
return ret;
}
static int ipu_remove(struct platform_device *pdev)
{
struct ipu *ipu = platform_get_drvdata(pdev);
ipu_idmac_exit(ipu);
ipu_irq_detach_irq(ipu, pdev);
clk_disable(ipu->ipu_clk);
clk_put(ipu->ipu_clk);
iounmap(ipu->reg_ic);
iounmap(ipu->reg_ipu);
tasklet_kill(&ipu->tasklet);
platform_set_drvdata(pdev, NULL);
return 0;
}
/*
* We need two MEM resources - with IPU-common and Image Converter registers,
* including PF_CONF and IDMAC_* registers, and two IRQs - function and error
*/
static struct platform_driver ipu_platform_driver = {
.driver = {
.name = "ipu-core",
.owner = THIS_MODULE,
},
.remove = ipu_remove,
};
static int __init ipu_init(void)
{
return platform_driver_probe(&ipu_platform_driver, ipu_probe);
}
subsys_initcall(ipu_init);
MODULE_DESCRIPTION("IPU core driver");
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Guennadi Liakhovetski <lg@denx.de>");
MODULE_ALIAS("platform:ipu-core");
drivers/dma/ipu/ipu_intern.h 0 → 100644
View file @ 7954d5cf
/*
* Copyright (C) 2008
* Guennadi Liakhovetski, DENX Software Engineering, <lg@denx.de>
*
* Copyright (C) 2005-2007 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 version 2 as
* published by the Free Software Foundation.
*/
#ifndef _IPU_INTERN_H_
#define _IPU_INTERN_H_
#include <linux/dmaengine.h>
#include <linux/platform_device.h>
#include <linux/interrupt.h>
/* IPU Common registers */
#define IPU_CONF 0x00
#define IPU_CHA_BUF0_RDY 0x04
#define IPU_CHA_BUF1_RDY 0x08
#define IPU_CHA_DB_MODE_SEL 0x0C
#define IPU_CHA_CUR_BUF 0x10
#define IPU_FS_PROC_FLOW 0x14
#define IPU_FS_DISP_FLOW 0x18
#define IPU_TASKS_STAT 0x1C
#define IPU_IMA_ADDR 0x20
#define IPU_IMA_DATA 0x24
#define IPU_INT_CTRL_1 0x28
#define IPU_INT_CTRL_2 0x2C
#define IPU_INT_CTRL_3 0x30
#define IPU_INT_CTRL_4 0x34
#define IPU_INT_CTRL_5 0x38
#define IPU_INT_STAT_1 0x3C
#define IPU_INT_STAT_2 0x40
#define IPU_INT_STAT_3 0x44
#define IPU_INT_STAT_4 0x48
#define IPU_INT_STAT_5 0x4C
#define IPU_BRK_CTRL_1 0x50
#define IPU_BRK_CTRL_2 0x54
#define IPU_BRK_STAT 0x58
#define IPU_DIAGB_CTRL 0x5C
/* IPU_CONF Register bits */
#define IPU_CONF_CSI_EN 0x00000001
#define IPU_CONF_IC_EN 0x00000002
#define IPU_CONF_ROT_EN 0x00000004
#define IPU_CONF_PF_EN 0x00000008
#define IPU_CONF_SDC_EN 0x00000010
#define IPU_CONF_ADC_EN 0x00000020
#define IPU_CONF_DI_EN 0x00000040
#define IPU_CONF_DU_EN 0x00000080
#define IPU_CONF_PXL_ENDIAN 0x00000100
/* Image Converter Registers */
#define IC_CONF 0x88
#define IC_PRP_ENC_RSC 0x8C
#define IC_PRP_VF_RSC 0x90
#define IC_PP_RSC 0x94
#define IC_CMBP_1 0x98
#define IC_CMBP_2 0x9C
#define PF_CONF 0xA0
#define IDMAC_CONF 0xA4
#define IDMAC_CHA_EN 0xA8
#define IDMAC_CHA_PRI 0xAC
#define IDMAC_CHA_BUSY 0xB0
/* Image Converter Register bits */
#define IC_CONF_PRPENC_EN 0x00000001
#define IC_CONF_PRPENC_CSC1 0x00000002
#define IC_CONF_PRPENC_ROT_EN 0x00000004
#define IC_CONF_PRPVF_EN 0x00000100
#define IC_CONF_PRPVF_CSC1 0x00000200
#define IC_CONF_PRPVF_CSC2 0x00000400
#define IC_CONF_PRPVF_CMB 0x00000800
#define IC_CONF_PRPVF_ROT_EN 0x00001000
#define IC_CONF_PP_EN 0x00010000
#define IC_CONF_PP_CSC1 0x00020000
#define IC_CONF_PP_CSC2 0x00040000
#define IC_CONF_PP_CMB 0x00080000
#define IC_CONF_PP_ROT_EN 0x00100000
#define IC_CONF_IC_GLB_LOC_A 0x10000000
#define IC_CONF_KEY_COLOR_EN 0x20000000
#define IC_CONF_RWS_EN 0x40000000
#define IC_CONF_CSI_MEM_WR_EN 0x80000000
#define IDMA_CHAN_INVALID 0x000000FF
#define IDMA_IC_0 0x00000001
#define IDMA_IC_1 0x00000002
#define IDMA_IC_2 0x00000004
#define IDMA_IC_3 0x00000008
#define IDMA_IC_4 0x00000010
#define IDMA_IC_5 0x00000020
#define IDMA_IC_6 0x00000040
#define IDMA_IC_7 0x00000080
#define IDMA_IC_8 0x00000100
#define IDMA_IC_9 0x00000200
#define IDMA_IC_10 0x00000400
#define IDMA_IC_11 0x00000800
#define IDMA_IC_12 0x00001000
#define IDMA_IC_13 0x00002000
#define IDMA_SDC_BG 0x00004000
#define IDMA_SDC_FG 0x00008000
#define IDMA_SDC_MASK 0x00010000
#define IDMA_SDC_PARTIAL 0x00020000
#define IDMA_ADC_SYS1_WR 0x00040000
#define IDMA_ADC_SYS2_WR 0x00080000
#define IDMA_ADC_SYS1_CMD 0x00100000
#define IDMA_ADC_SYS2_CMD 0x00200000
#define IDMA_ADC_SYS1_RD 0x00400000
#define IDMA_ADC_SYS2_RD 0x00800000
#define IDMA_PF_QP 0x01000000
#define IDMA_PF_BSP 0x02000000
#define IDMA_PF_Y_IN 0x04000000
#define IDMA_PF_U_IN 0x08000000
#define IDMA_PF_V_IN 0x10000000
#define IDMA_PF_Y_OUT 0x20000000
#define IDMA_PF_U_OUT 0x40000000
#define IDMA_PF_V_OUT 0x80000000
#define TSTAT_PF_H264_PAUSE 0x00000001
#define TSTAT_CSI2MEM_MASK 0x0000000C
#define TSTAT_CSI2MEM_OFFSET 2
#define TSTAT_VF_MASK 0x00000600
#define TSTAT_VF_OFFSET 9
#define TSTAT_VF_ROT_MASK 0x000C0000
#define TSTAT_VF_ROT_OFFSET 18
#define TSTAT_ENC_MASK 0x00000180
#define TSTAT_ENC_OFFSET 7
#define TSTAT_ENC_ROT_MASK 0x00030000
#define TSTAT_ENC_ROT_OFFSET 16
#define TSTAT_PP_MASK 0x00001800
#define TSTAT_PP_OFFSET 11
#define TSTAT_PP_ROT_MASK 0x00300000
#define TSTAT_PP_ROT_OFFSET 20
#define TSTAT_PF_MASK 0x00C00000
#define TSTAT_PF_OFFSET 22
#define TSTAT_ADCSYS1_MASK 0x03000000
#define TSTAT_ADCSYS1_OFFSET 24
#define TSTAT_ADCSYS2_MASK 0x0C000000
#define TSTAT_ADCSYS2_OFFSET 26
#define TASK_STAT_IDLE 0
#define TASK_STAT_ACTIVE 1
#define TASK_STAT_WAIT4READY 2
struct idmac {
struct dma_device dma;
};
struct ipu {
void __iomem *reg_ipu;
void __iomem *reg_ic;
unsigned int irq_fn; /* IPU Function IRQ to the CPU */
unsigned int irq_err; /* IPU Error IRQ to the CPU */
unsigned int irq_base; /* Beginning of the IPU IRQ range */
unsigned long channel_init_mask;
spinlock_t lock;
struct clk *ipu_clk;
struct device *dev;
struct idmac idmac;
struct idmac_channel channel[IPU_CHANNELS_NUM];
struct tasklet_struct tasklet;
};
#define to_idmac(d) container_of(d, struct idmac, dma)
extern int ipu_irq_attach_irq(struct ipu *ipu, struct platform_device *dev);
extern void ipu_irq_detach_irq(struct ipu *ipu, struct platform_device *dev);
extern bool ipu_irq_status(uint32_t irq);
extern int ipu_irq_map(unsigned int source);
extern int ipu_irq_unmap(unsigned int source);
#endif
drivers/dma/ipu/ipu_irq.c 0 → 100644
View file @ 7954d5cf
/*
* Copyright (C) 2008
* Guennadi Liakhovetski, DENX Software Engineering, <lg@denx.de>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/init.h>
#include <linux/err.h>
#include <linux/spinlock.h>
#include <linux/delay.h>
#include <linux/clk.h>
#include <linux/irq.h>
#include <linux/io.h>
#include <mach/ipu.h>
#include "ipu_intern.h"
/*
* Register read / write - shall be inlined by the compiler
*/
static u32 ipu_read_reg(struct ipu *ipu, unsigned long reg)
{
return __raw_readl(ipu->reg_ipu + reg);
}
static void ipu_write_reg(struct ipu *ipu, u32 value, unsigned long reg)
{
__raw_writel(value, ipu->reg_ipu + reg);
}
/*
* IPU IRQ chip driver
*/
#define IPU_IRQ_NR_FN_BANKS 3
#define IPU_IRQ_NR_ERR_BANKS 2
#define IPU_IRQ_NR_BANKS (IPU_IRQ_NR_FN_BANKS + IPU_IRQ_NR_ERR_BANKS)
struct ipu_irq_bank {
unsigned int control;
unsigned int status;
spinlock_t lock;
struct ipu *ipu;
};
static struct ipu_irq_bank irq_bank[IPU_IRQ_NR_BANKS] = {
/* 3 groups of functional interrupts */
{
.control = IPU_INT_CTRL_1,
.status = IPU_INT_STAT_1,
}, {
.control = IPU_INT_CTRL_2,
.status = IPU_INT_STAT_2,
}, {
.control = IPU_INT_CTRL_3,
.status = IPU_INT_STAT_3,
},
/* 2 groups of error interrupts */
{
.control = IPU_INT_CTRL_4,
.status = IPU_INT_STAT_4,
}, {
.control = IPU_INT_CTRL_5,
.status = IPU_INT_STAT_5,
},
};
struct ipu_irq_map {
unsigned int irq;
int source;
struct ipu_irq_bank *bank;
struct ipu *ipu;
};
static struct ipu_irq_map irq_map[CONFIG_MX3_IPU_IRQS];
/* Protects allocations from the above array of maps */
static DEFINE_MUTEX(map_lock);
/* Protects register accesses and individual mappings */
static DEFINE_SPINLOCK(bank_lock);
static struct ipu_irq_map *src2map(unsigned int src)
{
int i;
for (i = 0; i < CONFIG_MX3_IPU_IRQS; i++)
if (irq_map[i].source == src)
return irq_map + i;
return NULL;
}
static void ipu_irq_unmask(unsigned int irq)
{
struct ipu_irq_map *map = get_irq_chip_data(irq);
struct ipu_irq_bank *bank;
uint32_t reg;
unsigned long lock_flags;
spin_lock_irqsave(&bank_lock, lock_flags);
bank = map->bank;
if (!bank) {
spin_unlock_irqrestore(&bank_lock, lock_flags);
pr_err("IPU: %s(%u) - unmapped!\n", __func__, irq);
return;
}
reg = ipu_read_reg(bank->ipu, bank->control);
reg |= (1UL << (map->source & 31));
ipu_write_reg(bank->ipu, reg, bank->control);
spin_unlock_irqrestore(&bank_lock, lock_flags);
}
static void ipu_irq_mask(unsigned int irq)
{
struct ipu_irq_map *map = get_irq_chip_data(irq);
struct ipu_irq_bank *bank;
uint32_t reg;
unsigned long lock_flags;
spin_lock_irqsave(&bank_lock, lock_flags);
bank = map->bank;
if (!bank) {
spin_unlock_irqrestore(&bank_lock, lock_flags);
pr_err("IPU: %s(%u) - unmapped!\n", __func__, irq);
return;
}
reg = ipu_read_reg(bank->ipu, bank->control);
reg &= ~(1UL << (map->source & 31));
ipu_write_reg(bank->ipu, reg, bank->control);
spin_unlock_irqrestore(&bank_lock, lock_flags);
}
static void ipu_irq_ack(unsigned int irq)
{
struct ipu_irq_map *map = get_irq_chip_data(irq);
struct ipu_irq_bank *bank;
unsigned long lock_flags;
spin_lock_irqsave(&bank_lock, lock_flags);
bank = map->bank;
if (!bank) {
spin_unlock_irqrestore(&bank_lock, lock_flags);
pr_err("IPU: %s(%u) - unmapped!\n", __func__, irq);
return;
}
ipu_write_reg(bank->ipu, 1UL << (map->source & 31), bank->status);
spin_unlock_irqrestore(&bank_lock, lock_flags);
}
/**
* ipu_irq_status() - returns the current interrupt status of the specified IRQ.
* @irq: interrupt line to get status for.
* @return: true if the interrupt is pending/asserted or false if the
* interrupt is not pending.
*/
bool ipu_irq_status(unsigned int irq)
{
struct ipu_irq_map *map = get_irq_chip_data(irq);
struct ipu_irq_bank *bank;
unsigned long lock_flags;
bool ret;
spin_lock_irqsave(&bank_lock, lock_flags);
bank = map->bank;
ret = bank && ipu_read_reg(bank->ipu, bank->status) &
(1UL << (map->source & 31));
spin_unlock_irqrestore(&bank_lock, lock_flags);
return ret;
}
/**
* ipu_irq_map() - map an IPU interrupt source to an IRQ number
* @source: interrupt source bit position (see below)
* @return: mapped IRQ number or negative error code
*
* The source parameter has to be explained further. On i.MX31 IPU has 137 IRQ
* sources, they are broken down in 5 32-bit registers, like 32, 32, 24, 32, 17.
* However, the source argument of this function is not the sequence number of
* the possible IRQ, but rather its bit position. So, first interrupt in fourth
* register has source number 96, and not 88. This makes calculations easier,
* and also provides forward compatibility with any future IPU implementations
* with any interrupt bit assignments.
*/
int ipu_irq_map(unsigned int source)
{
int i, ret = -ENOMEM;
struct ipu_irq_map *map;
might_sleep();
mutex_lock(&map_lock);
map = src2map(source);
if (map) {
pr_err("IPU: Source %u already mapped to IRQ %u\n", source, map->irq);
ret = -EBUSY;
goto out;
}
for (i = 0; i < CONFIG_MX3_IPU_IRQS; i++) {
if (irq_map[i].source < 0) {
unsigned long lock_flags;
spin_lock_irqsave(&bank_lock, lock_flags);
irq_map[i].source = source;
irq_map[i].bank = irq_bank + source / 32;
spin_unlock_irqrestore(&bank_lock, lock_flags);
ret = irq_map[i].irq;
pr_debug("IPU: mapped source %u to IRQ %u\n",
source, ret);
break;
}
}
out:
mutex_unlock(&map_lock);
if (ret < 0)
pr_err("IPU: couldn't map source %u: %d\n", source, ret);
return ret;
}
/**
* ipu_irq_map() - map an IPU interrupt source to an IRQ number
* @source: interrupt source bit position (see ipu_irq_map())
* @return: 0 or negative error code
*/
int ipu_irq_unmap(unsigned int source)
{
int i, ret = -EINVAL;
might_sleep();
mutex_lock(&map_lock);
for (i = 0; i < CONFIG_MX3_IPU_IRQS; i++) {
if (irq_map[i].source == source) {
unsigned long lock_flags;
pr_debug("IPU: unmapped source %u from IRQ %u\n",
source, irq_map[i].irq);
spin_lock_irqsave(&bank_lock, lock_flags);
irq_map[i].source = -EINVAL;
irq_map[i].bank = NULL;
spin_unlock_irqrestore(&bank_lock, lock_flags);
ret = 0;
break;
}
}
mutex_unlock(&map_lock);
return ret;
}
/* Chained IRQ handler for IPU error interrupt */
static void ipu_irq_err(unsigned int irq, struct irq_desc *desc)
{
struct ipu *ipu = get_irq_data(irq);
u32 status;
int i, line;
for (i = IPU_IRQ_NR_FN_BANKS; i < IPU_IRQ_NR_BANKS; i++) {
struct ipu_irq_bank *bank = irq_bank + i;
spin_lock(&bank_lock);
status = ipu_read_reg(ipu, bank->status);
/*
* Don't think we have to clear all interrupts here, they will
* be acked by ->handle_irq() (handle_level_irq). However, we
* might want to clear unhandled interrupts after the loop...
*/
status &= ipu_read_reg(ipu, bank->control);
spin_unlock(&bank_lock);
while ((line = ffs(status))) {
struct ipu_irq_map *map;
line--;
status &= ~(1UL << line);
spin_lock(&bank_lock);
map = src2map(32 * i + line);
if (map)
irq = map->irq;
spin_unlock(&bank_lock);
if (!map) {
pr_err("IPU: Interrupt on unmapped source %u bank %d\n",
line, i);
continue;
}
generic_handle_irq(irq);
}
}
}
/* Chained IRQ handler for IPU function interrupt */
static void ipu_irq_fn(unsigned int irq, struct irq_desc *desc)
{
struct ipu *ipu = get_irq_data(irq);
u32 status;
int i, line;
for (i = 0; i < IPU_IRQ_NR_FN_BANKS; i++) {
struct ipu_irq_bank *bank = irq_bank + i;
spin_lock(&bank_lock);
status = ipu_read_reg(ipu, bank->status);
/* Not clearing all interrupts, see above */
status &= ipu_read_reg(ipu, bank->control);
spin_unlock(&bank_lock);
while ((line = ffs(status))) {
struct ipu_irq_map *map;
line--;
status &= ~(1UL << line);
spin_lock(&bank_lock);
map = src2map(32 * i + line);
if (map)
irq = map->irq;
spin_unlock(&bank_lock);
if (!map) {
pr_err("IPU: Interrupt on unmapped source %u bank %d\n",
line, i);
continue;
}
generic_handle_irq(irq);
}
}
}
static struct irq_chip ipu_irq_chip = {
.name = "ipu_irq",
.ack = ipu_irq_ack,
.mask = ipu_irq_mask,
.unmask = ipu_irq_unmask,
};
/* Install the IRQ handler */
int ipu_irq_attach_irq(struct ipu *ipu, struct platform_device *dev)
{
struct ipu_platform_data *pdata = dev->dev.platform_data;
unsigned int irq, irq_base, i;
irq_base = pdata->irq_base;
for (i = 0; i < IPU_IRQ_NR_BANKS; i++)
irq_bank[i].ipu = ipu;
for (i = 0; i < CONFIG_MX3_IPU_IRQS; i++) {
int ret;
irq = irq_base + i;
ret = set_irq_chip(irq, &ipu_irq_chip);
if (ret < 0)
return ret;
ret = set_irq_chip_data(irq, irq_map + i);
if (ret < 0)
return ret;
irq_map[i].ipu = ipu;
irq_map[i].irq = irq;
irq_map[i].source = -EINVAL;
set_irq_handler(irq, handle_level_irq);
#ifdef CONFIG_ARM
set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
#endif
}
set_irq_data(ipu->irq_fn, ipu);
set_irq_chained_handler(ipu->irq_fn, ipu_irq_fn);
set_irq_data(ipu->irq_err, ipu);
set_irq_chained_handler(ipu->irq_err, ipu_irq_err);
return 0;
}
void ipu_irq_detach_irq(struct ipu *ipu, struct platform_device *dev)
{
struct ipu_platform_data *pdata = dev->dev.platform_data;
unsigned int irq, irq_base;
irq_base = pdata->irq_base;
set_irq_chained_handler(ipu->irq_fn, NULL);
set_irq_data(ipu->irq_fn, NULL);
set_irq_chained_handler(ipu->irq_err, NULL);
set_irq_data(ipu->irq_err, NULL);
for (irq = irq_base; irq < irq_base + CONFIG_MX3_IPU_IRQS; irq++) {
#ifdef CONFIG_ARM
set_irq_flags(irq, 0);
#endif
set_irq_chip(irq, NULL);
set_irq_chip_data(irq, NULL);
}
}
drivers/video/Kconfig
View file @ 7954d5cf
...@@ -2123,6 +2123,18 @@ config FB_PRE_INIT_FB ...@@ -2123,6 +2123,18 @@ config FB_PRE_INIT_FB
Select this option if display contents should be inherited as set by Select this option if display contents should be inherited as set by
the bootloader. the bootloader.
config FB_MX3
tristate "MX3 Framebuffer support"
depends on FB && MX3_IPU
select FB_CFB_FILLRECT
select FB_CFB_COPYAREA
select FB_CFB_IMAGEBLIT
default y
help
This is a framebuffer device for the i.MX31 LCD Controller. So
far only synchronous displays are supported. If you plan to use
an LCD display with your i.MX31 system, say Y here.
source "drivers/video/omap/Kconfig" source "drivers/video/omap/Kconfig"
source "drivers/video/backlight/Kconfig" source "drivers/video/backlight/Kconfig"
......
drivers/video/Makefile
View file @ 7954d5cf
...@@ -132,6 +132,7 @@ obj-$(CONFIG_FB_VGA16) += vga16fb.o ...@@ -132,6 +132,7 @@ obj-$(CONFIG_FB_VGA16) += vga16fb.o
obj-$(CONFIG_FB_OF) += offb.o obj-$(CONFIG_FB_OF) += offb.o
obj-$(CONFIG_FB_BF54X_LQ043) += bf54x-lq043fb.o obj-$(CONFIG_FB_BF54X_LQ043) += bf54x-lq043fb.o
obj-$(CONFIG_FB_BFIN_T350MCQB) += bfin-t350mcqb-fb.o obj-$(CONFIG_FB_BFIN_T350MCQB) += bfin-t350mcqb-fb.o
obj-$(CONFIG_FB_MX3) += mx3fb.o
# the test framebuffer is last # the test framebuffer is last
obj-$(CONFIG_FB_VIRTUAL) += vfb.o obj-$(CONFIG_FB_VIRTUAL) += vfb.o
......
drivers/video/mx3fb.c 0 → 100644
View file @ 7954d5cf
/*
* Copyright (C) 2008
* Guennadi Liakhovetski, DENX Software Engineering, <lg@denx.de>
*
* Copyright 2004-2007 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 version 2 as
* published by the Free Software Foundation.
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/sched.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/interrupt.h>
#include <linux/slab.h>
#include <linux/fb.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/dma-mapping.h>
#include <linux/dmaengine.h>
#include <linux/console.h>
#include <linux/clk.h>
#include <linux/mutex.h>
#include <mach/hardware.h>
#include <mach/ipu.h>
#include <mach/mx3fb.h>
#include <asm/io.h>
#include <asm/uaccess.h>
#define MX3FB_NAME "mx3_sdc_fb"
#define MX3FB_REG_OFFSET 0xB4
/* SDC Registers */
#define SDC_COM_CONF (0xB4 - MX3FB_REG_OFFSET)
#define SDC_GW_CTRL (0xB8 - MX3FB_REG_OFFSET)
#define SDC_FG_POS (0xBC - MX3FB_REG_OFFSET)
#define SDC_BG_POS (0xC0 - MX3FB_REG_OFFSET)
#define SDC_CUR_POS (0xC4 - MX3FB_REG_OFFSET)
#define SDC_PWM_CTRL (0xC8 - MX3FB_REG_OFFSET)
#define SDC_CUR_MAP (0xCC - MX3FB_REG_OFFSET)
#define SDC_HOR_CONF (0xD0 - MX3FB_REG_OFFSET)
#define SDC_VER_CONF (0xD4 - MX3FB_REG_OFFSET)
#define SDC_SHARP_CONF_1 (0xD8 - MX3FB_REG_OFFSET)
#define SDC_SHARP_CONF_2 (0xDC - MX3FB_REG_OFFSET)
/* Register bits */
#define SDC_COM_TFT_COLOR 0x00000001UL
#define SDC_COM_FG_EN 0x00000010UL
#define SDC_COM_GWSEL 0x00000020UL
#define SDC_COM_GLB_A 0x00000040UL
#define SDC_COM_KEY_COLOR_G 0x00000080UL
#define SDC_COM_BG_EN 0x00000200UL
#define SDC_COM_SHARP 0x00001000UL
#define SDC_V_SYNC_WIDTH_L 0x00000001UL
/* Display Interface registers */
#define DI_DISP_IF_CONF (0x0124 - MX3FB_REG_OFFSET)
#define DI_DISP_SIG_POL (0x0128 - MX3FB_REG_OFFSET)
#define DI_SER_DISP1_CONF (0x012C - MX3FB_REG_OFFSET)
#define DI_SER_DISP2_CONF (0x0130 - MX3FB_REG_OFFSET)
#define DI_HSP_CLK_PER (0x0134 - MX3FB_REG_OFFSET)
#define DI_DISP0_TIME_CONF_1 (0x0138 - MX3FB_REG_OFFSET)
#define DI_DISP0_TIME_CONF_2 (0x013C - MX3FB_REG_OFFSET)
#define DI_DISP0_TIME_CONF_3 (0x0140 - MX3FB_REG_OFFSET)
#define DI_DISP1_TIME_CONF_1 (0x0144 - MX3FB_REG_OFFSET)
#define DI_DISP1_TIME_CONF_2 (0x0148 - MX3FB_REG_OFFSET)
#define DI_DISP1_TIME_CONF_3 (0x014C - MX3FB_REG_OFFSET)
#define DI_DISP2_TIME_CONF_1 (0x0150 - MX3FB_REG_OFFSET)
#define DI_DISP2_TIME_CONF_2 (0x0154 - MX3FB_REG_OFFSET)
#define DI_DISP2_TIME_CONF_3 (0x0158 - MX3FB_REG_OFFSET)
#define DI_DISP3_TIME_CONF (0x015C - MX3FB_REG_OFFSET)
#define DI_DISP0_DB0_MAP (0x0160 - MX3FB_REG_OFFSET)
#define DI_DISP0_DB1_MAP (0x0164 - MX3FB_REG_OFFSET)
#define DI_DISP0_DB2_MAP (0x0168 - MX3FB_REG_OFFSET)
#define DI_DISP0_CB0_MAP (0x016C - MX3FB_REG_OFFSET)
#define DI_DISP0_CB1_MAP (0x0170 - MX3FB_REG_OFFSET)
#define DI_DISP0_CB2_MAP (0x0174 - MX3FB_REG_OFFSET)
#define DI_DISP1_DB0_MAP (0x0178 - MX3FB_REG_OFFSET)
#define DI_DISP1_DB1_MAP (0x017C - MX3FB_REG_OFFSET)
#define DI_DISP1_DB2_MAP (0x0180 - MX3FB_REG_OFFSET)
#define DI_DISP1_CB0_MAP (0x0184 - MX3FB_REG_OFFSET)
#define DI_DISP1_CB1_MAP (0x0188 - MX3FB_REG_OFFSET)
#define DI_DISP1_CB2_MAP (0x018C - MX3FB_REG_OFFSET)
#define DI_DISP2_DB0_MAP (0x0190 - MX3FB_REG_OFFSET)
#define DI_DISP2_DB1_MAP (0x0194 - MX3FB_REG_OFFSET)
#define DI_DISP2_DB2_MAP (0x0198 - MX3FB_REG_OFFSET)
#define DI_DISP2_CB0_MAP (0x019C - MX3FB_REG_OFFSET)
#define DI_DISP2_CB1_MAP (0x01A0 - MX3FB_REG_OFFSET)
#define DI_DISP2_CB2_MAP (0x01A4 - MX3FB_REG_OFFSET)
#define DI_DISP3_B0_MAP (0x01A8 - MX3FB_REG_OFFSET)
#define DI_DISP3_B1_MAP (0x01AC - MX3FB_REG_OFFSET)
#define DI_DISP3_B2_MAP (0x01B0 - MX3FB_REG_OFFSET)
#define DI_DISP_ACC_CC (0x01B4 - MX3FB_REG_OFFSET)
#define DI_DISP_LLA_CONF (0x01B8 - MX3FB_REG_OFFSET)
#define DI_DISP_LLA_DATA (0x01BC - MX3FB_REG_OFFSET)
/* DI_DISP_SIG_POL bits */
#define DI_D3_VSYNC_POL_SHIFT 28
#define DI_D3_HSYNC_POL_SHIFT 27
#define DI_D3_DRDY_SHARP_POL_SHIFT 26
#define DI_D3_CLK_POL_SHIFT 25
#define DI_D3_DATA_POL_SHIFT 24
/* DI_DISP_IF_CONF bits */
#define DI_D3_CLK_IDLE_SHIFT 26
#define DI_D3_CLK_SEL_SHIFT 25
#define DI_D3_DATAMSK_SHIFT 24
enum ipu_panel {
IPU_PANEL_SHARP_TFT,
IPU_PANEL_TFT,
};
struct ipu_di_signal_cfg {
unsigned datamask_en:1;
unsigned clksel_en:1;
unsigned clkidle_en:1;
unsigned data_pol:1; /* true = inverted */
unsigned clk_pol:1; /* true = rising edge */
unsigned enable_pol:1;
unsigned Hsync_pol:1; /* true = active high */
unsigned Vsync_pol:1;
};
static const struct fb_videomode mx3fb_modedb[] = {
{
/* 240x320 @ 60 Hz */
.name = "Sharp-QVGA",
.refresh = 60,
.xres = 240,
.yres = 320,
.pixclock = 185925,
.left_margin = 9,
.right_margin = 16,
.upper_margin = 7,
.lower_margin = 9,
.hsync_len = 1,
.vsync_len = 1,
.sync = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_SHARP_MODE |
FB_SYNC_CLK_INVERT | FB_SYNC_DATA_INVERT |
FB_SYNC_CLK_IDLE_EN,
.vmode = FB_VMODE_NONINTERLACED,
.flag = 0,
}, {
/* 240x33 @ 60 Hz */
.name = "Sharp-CLI",
.refresh = 60,
.xres = 240,
.yres = 33,
.pixclock = 185925,
.left_margin = 9,
.right_margin = 16,
.upper_margin = 7,
.lower_margin = 9 + 287,
.hsync_len = 1,
.vsync_len = 1,
.sync = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_SHARP_MODE |
FB_SYNC_CLK_INVERT | FB_SYNC_DATA_INVERT |
FB_SYNC_CLK_IDLE_EN,
.vmode = FB_VMODE_NONINTERLACED,
.flag = 0,
}, {
/* 640x480 @ 60 Hz */
.name = "NEC-VGA",
.refresh = 60,
.xres = 640,
.yres = 480,
.pixclock = 38255,
.left_margin = 144,
.right_margin = 0,
.upper_margin = 34,
.lower_margin = 40,
.hsync_len = 1,
.vsync_len = 1,
.sync = FB_SYNC_VERT_HIGH_ACT | FB_SYNC_OE_ACT_HIGH,
.vmode = FB_VMODE_NONINTERLACED,
.flag = 0,
}, {
/* NTSC TV output */
.name = "TV-NTSC",
.refresh = 60,
.xres = 640,
.yres = 480,
.pixclock = 37538,
.left_margin = 38,
.right_margin = 858 - 640 - 38 - 3,
.upper_margin = 36,
.lower_margin = 518 - 480 - 36 - 1,
.hsync_len = 3,
.vsync_len = 1,
.sync = 0,
.vmode = FB_VMODE_NONINTERLACED,
.flag = 0,
}, {
/* PAL TV output */
.name = "TV-PAL",
.refresh = 50,
.xres = 640,
.yres = 480,
.pixclock = 37538,
.left_margin = 38,
.right_margin = 960 - 640 - 38 - 32,
.upper_margin = 32,
.lower_margin = 555 - 480 - 32 - 3,
.hsync_len = 32,
.vsync_len = 3,
.sync = 0,
.vmode = FB_VMODE_NONINTERLACED,
.flag = 0,
}, {
/* TV output VGA mode, 640x480 @ 65 Hz */
.name = "TV-VGA",
.refresh = 60,
.xres = 640,
.yres = 480,
.pixclock = 40574,
.left_margin = 35,
.right_margin = 45,
.upper_margin = 9,
.lower_margin = 1,
.hsync_len = 46,
.vsync_len = 5,
.sync = 0,
.vmode = FB_VMODE_NONINTERLACED,
.flag = 0,
},
};
struct mx3fb_data {
struct fb_info *fbi;
int backlight_level;
void __iomem *reg_base;
spinlock_t lock;
struct device *dev;
uint32_t h_start_width;
uint32_t v_start_width;
};
struct dma_chan_request {
struct mx3fb_data *mx3fb;
enum ipu_channel id;
};
/* MX3 specific framebuffer information. */
struct mx3fb_info {
int blank;
enum ipu_channel ipu_ch;
uint32_t cur_ipu_buf;
u32 pseudo_palette[16];
struct completion flip_cmpl;
struct mutex mutex; /* Protects fb-ops */
struct mx3fb_data *mx3fb;
struct idmac_channel *idmac_channel;
struct dma_async_tx_descriptor *txd;
dma_cookie_t cookie;
struct scatterlist sg[2];
u32 sync; /* preserve var->sync flags */
};
static void mx3fb_dma_done(void *);
/* Used fb-mode and bpp. Can be set on kernel command line, therefore file-static. */
static const char *fb_mode;
static unsigned long default_bpp = 16;
static u32 mx3fb_read_reg(struct mx3fb_data *mx3fb, unsigned long reg)
{
return __raw_readl(mx3fb->reg_base + reg);
}
static void mx3fb_write_reg(struct mx3fb_data *mx3fb, u32 value, unsigned long reg)
{
__raw_writel(value, mx3fb->reg_base + reg);
}
static const uint32_t di_mappings[] = {
0x1600AAAA, 0x00E05555, 0x00070000, 3, /* RGB888 */
0x0005000F, 0x000B000F, 0x0011000F, 1, /* RGB666 */
0x0011000F, 0x000B000F, 0x0005000F, 1, /* BGR666 */
0x0004003F, 0x000A000F, 0x000F003F, 1 /* RGB565 */
};
static void sdc_fb_init(struct mx3fb_info *fbi)
{
struct mx3fb_data *mx3fb = fbi->mx3fb;
uint32_t reg;
reg = mx3fb_read_reg(mx3fb, SDC_COM_CONF);
mx3fb_write_reg(mx3fb, reg | SDC_COM_BG_EN, SDC_COM_CONF);
}
/* Returns enabled flag before uninit */
static uint32_t sdc_fb_uninit(struct mx3fb_info *fbi)
{
struct mx3fb_data *mx3fb = fbi->mx3fb;
uint32_t reg;
reg = mx3fb_read_reg(mx3fb, SDC_COM_CONF);
mx3fb_write_reg(mx3fb, reg & ~SDC_COM_BG_EN, SDC_COM_CONF);
return reg & SDC_COM_BG_EN;
}
static void sdc_enable_channel(struct mx3fb_info *mx3_fbi)
{
struct mx3fb_data *mx3fb = mx3_fbi->mx3fb;
struct idmac_channel *ichan = mx3_fbi->idmac_channel;
struct dma_chan *dma_chan = &ichan->dma_chan;
unsigned long flags;
dma_cookie_t cookie;
dev_dbg(mx3fb->dev, "mx3fbi %p, desc %p, sg %p\n", mx3_fbi,
to_tx_desc(mx3_fbi->txd), to_tx_desc(mx3_fbi->txd)->sg);
/* This enables the channel */
if (mx3_fbi->cookie < 0) {
mx3_fbi->txd = dma_chan->device->device_prep_slave_sg(dma_chan,
&mx3_fbi->sg[0], 1, DMA_TO_DEVICE, DMA_PREP_INTERRUPT);
if (!mx3_fbi->txd) {
dev_err(mx3fb->dev, "Cannot allocate descriptor on %d\n",
dma_chan->chan_id);
return;
}
mx3_fbi->txd->callback_param = mx3_fbi->txd;
mx3_fbi->txd->callback = mx3fb_dma_done;
cookie = mx3_fbi->txd->tx_submit(mx3_fbi->txd);
dev_dbg(mx3fb->dev, "%d: Submit %p #%d [%c]\n", __LINE__,
mx3_fbi->txd, cookie, list_empty(&ichan->queue) ? '-' : '+');
} else {
if (!mx3_fbi->txd || !mx3_fbi->txd->tx_submit) {
dev_err(mx3fb->dev, "Cannot enable channel %d\n",
dma_chan->chan_id);
return;
}
/* Just re-activate the same buffer */
dma_async_issue_pending(dma_chan);
cookie = mx3_fbi->cookie;
dev_dbg(mx3fb->dev, "%d: Re-submit %p #%d [%c]\n", __LINE__,
mx3_fbi->txd, cookie, list_empty(&ichan->queue) ? '-' : '+');
}
if (cookie >= 0) {
spin_lock_irqsave(&mx3fb->lock, flags);
sdc_fb_init(mx3_fbi);
mx3_fbi->cookie = cookie;
spin_unlock_irqrestore(&mx3fb->lock, flags);
}
/*
* Attention! Without this msleep the channel keeps generating
* interrupts. Next sdc_set_brightness() is going to be called
* from mx3fb_blank().
*/
msleep(2);
}
static void sdc_disable_channel(struct mx3fb_info *mx3_fbi)
{
struct mx3fb_data *mx3fb = mx3_fbi->mx3fb;
uint32_t enabled;
unsigned long flags;
spin_lock_irqsave(&mx3fb->lock, flags);
enabled = sdc_fb_uninit(mx3_fbi);
spin_unlock_irqrestore(&mx3fb->lock, flags);
mx3_fbi->txd->chan->device->device_terminate_all(mx3_fbi->txd->chan);
mx3_fbi->txd = NULL;
mx3_fbi->cookie = -EINVAL;
}
/**
* sdc_set_window_pos() - set window position of the respective plane.
* @mx3fb: mx3fb context.
* @channel: IPU DMAC channel ID.
* @x_pos: X coordinate relative to the top left corner to place window at.
* @y_pos: Y coordinate relative to the top left corner to place window at.
* @return: 0 on success or negative error code on failure.
*/
static int sdc_set_window_pos(struct mx3fb_data *mx3fb, enum ipu_channel channel,
int16_t x_pos, int16_t y_pos)
{
x_pos += mx3fb->h_start_width;
y_pos += mx3fb->v_start_width;
if (channel != IDMAC_SDC_0)
return -EINVAL;
mx3fb_write_reg(mx3fb, (x_pos << 16) | y_pos, SDC_BG_POS);
return 0;
}
/**
* sdc_init_panel() - initialize a synchronous LCD panel.
* @mx3fb: mx3fb context.
* @panel: panel type.
* @pixel_clk: desired pixel clock frequency in Hz.
* @width: width of panel in pixels.
* @height: height of panel in pixels.
* @pixel_fmt: pixel format of buffer as FOURCC ASCII code.
* @h_start_width: number of pixel clocks between the HSYNC signal pulse
* and the start of valid data.
* @h_sync_width: width of the HSYNC signal in units of pixel clocks.
* @h_end_width: number of pixel clocks between the end of valid data
* and the HSYNC signal for next line.
* @v_start_width: number of lines between the VSYNC signal pulse and the
* start of valid data.
* @v_sync_width: width of the VSYNC signal in units of lines
* @v_end_width: number of lines between the end of valid data and the
* VSYNC signal for next frame.
* @sig: bitfield of signal polarities for LCD interface.
* @return: 0 on success or negative error code on failure.
*/
static int sdc_init_panel(struct mx3fb_data *mx3fb, enum ipu_panel panel,
uint32_t pixel_clk,
uint16_t width, uint16_t height,
enum pixel_fmt pixel_fmt,
uint16_t h_start_width, uint16_t h_sync_width,
uint16_t h_end_width, uint16_t v_start_width,
uint16_t v_sync_width, uint16_t v_end_width,
struct ipu_di_signal_cfg sig)
{
unsigned long lock_flags;
uint32_t reg;
uint32_t old_conf;
uint32_t div;
struct clk *ipu_clk;
dev_dbg(mx3fb->dev, "panel size = %d x %d", width, height);
if (v_sync_width == 0 || h_sync_width == 0)
return -EINVAL;
/* Init panel size and blanking periods */
reg = ((uint32_t) (h_sync_width - 1) << 26) |
((uint32_t) (width + h_start_width + h_end_width - 1) << 16);
mx3fb_write_reg(mx3fb, reg, SDC_HOR_CONF);
#ifdef DEBUG
printk(KERN_CONT " hor_conf %x,", reg);
#endif
reg = ((uint32_t) (v_sync_width - 1) << 26) | SDC_V_SYNC_WIDTH_L |
((uint32_t) (height + v_start_width + v_end_width - 1) << 16);
mx3fb_write_reg(mx3fb, reg, SDC_VER_CONF);
#ifdef DEBUG
printk(KERN_CONT " ver_conf %x\n", reg);
#endif
mx3fb->h_start_width = h_start_width;
mx3fb->v_start_width = v_start_width;
switch (panel) {
case IPU_PANEL_SHARP_TFT:
mx3fb_write_reg(mx3fb, 0x00FD0102L, SDC_SHARP_CONF_1);
mx3fb_write_reg(mx3fb, 0x00F500F4L, SDC_SHARP_CONF_2);
mx3fb_write_reg(mx3fb, SDC_COM_SHARP | SDC_COM_TFT_COLOR, SDC_COM_CONF);
break;
case IPU_PANEL_TFT:
mx3fb_write_reg(mx3fb, SDC_COM_TFT_COLOR, SDC_COM_CONF);
break;
default:
return -EINVAL;
}
/* Init clocking */
/*
* Calculate divider: fractional part is 4 bits so simply multiple by
* 24 to get fractional part, as long as we stay under ~250MHz and on
* i.MX31 it (HSP_CLK) is <= 178MHz. Currently 128.267MHz
*/
dev_dbg(mx3fb->dev, "pixel clk = %d\n", pixel_clk);
ipu_clk = clk_get(mx3fb->dev, "ipu_clk");
div = clk_get_rate(ipu_clk) * 16 / pixel_clk;
clk_put(ipu_clk);
if (div < 0x40) { /* Divider less than 4 */
dev_dbg(mx3fb->dev,
"InitPanel() - Pixel clock divider less than 4\n");
div = 0x40;
}
spin_lock_irqsave(&mx3fb->lock, lock_flags);
/*
* DISP3_IF_CLK_DOWN_WR is half the divider value and 2 fraction bits
* fewer. Subtract 1 extra from DISP3_IF_CLK_DOWN_WR based on timing
* debug. DISP3_IF_CLK_UP_WR is 0
*/
mx3fb_write_reg(mx3fb, (((div / 8) - 1) << 22) | div, DI_DISP3_TIME_CONF);
/* DI settings */
old_conf = mx3fb_read_reg(mx3fb, DI_DISP_IF_CONF) & 0x78FFFFFF;
old_conf |= sig.datamask_en << DI_D3_DATAMSK_SHIFT |
sig.clksel_en << DI_D3_CLK_SEL_SHIFT |
sig.clkidle_en << DI_D3_CLK_IDLE_SHIFT;
mx3fb_write_reg(mx3fb, old_conf, DI_DISP_IF_CONF);
old_conf = mx3fb_read_reg(mx3fb, DI_DISP_SIG_POL) & 0xE0FFFFFF;
old_conf |= sig.data_pol << DI_D3_DATA_POL_SHIFT |
sig.clk_pol << DI_D3_CLK_POL_SHIFT |
sig.enable_pol << DI_D3_DRDY_SHARP_POL_SHIFT |
sig.Hsync_pol << DI_D3_HSYNC_POL_SHIFT |
sig.Vsync_pol << DI_D3_VSYNC_POL_SHIFT;
mx3fb_write_reg(mx3fb, old_conf, DI_DISP_SIG_POL);
switch (pixel_fmt) {
case IPU_PIX_FMT_RGB24:
mx3fb_write_reg(mx3fb, di_mappings[0], DI_DISP3_B0_MAP);
mx3fb_write_reg(mx3fb, di_mappings[1], DI_DISP3_B1_MAP);
mx3fb_write_reg(mx3fb, di_mappings[2], DI_DISP3_B2_MAP);
mx3fb_write_reg(mx3fb, mx3fb_read_reg(mx3fb, DI_DISP_ACC_CC) |
((di_mappings[3] - 1) << 12), DI_DISP_ACC_CC);
break;
case IPU_PIX_FMT_RGB666:
mx3fb_write_reg(mx3fb, di_mappings[4], DI_DISP3_B0_MAP);
mx3fb_write_reg(mx3fb, di_mappings[5], DI_DISP3_B1_MAP);
mx3fb_write_reg(mx3fb, di_mappings[6], DI_DISP3_B2_MAP);
mx3fb_write_reg(mx3fb, mx3fb_read_reg(mx3fb, DI_DISP_ACC_CC) |
((di_mappings[7] - 1) << 12), DI_DISP_ACC_CC);
break;
case IPU_PIX_FMT_BGR666:
mx3fb_write_reg(mx3fb, di_mappings[8], DI_DISP3_B0_MAP);
mx3fb_write_reg(mx3fb, di_mappings[9], DI_DISP3_B1_MAP);
mx3fb_write_reg(mx3fb, di_mappings[10], DI_DISP3_B2_MAP);
mx3fb_write_reg(mx3fb, mx3fb_read_reg(mx3fb, DI_DISP_ACC_CC) |
((di_mappings[11] - 1) << 12), DI_DISP_ACC_CC);
break;
default:
mx3fb_write_reg(mx3fb, di_mappings[12], DI_DISP3_B0_MAP);
mx3fb_write_reg(mx3fb, di_mappings[13], DI_DISP3_B1_MAP);
mx3fb_write_reg(mx3fb, di_mappings[14], DI_DISP3_B2_MAP);
mx3fb_write_reg(mx3fb, mx3fb_read_reg(mx3fb, DI_DISP_ACC_CC) |
((di_mappings[15] - 1) << 12), DI_DISP_ACC_CC);
break;
}
spin_unlock_irqrestore(&mx3fb->lock, lock_flags);
dev_dbg(mx3fb->dev, "DI_DISP_IF_CONF = 0x%08X\n",
mx3fb_read_reg(mx3fb, DI_DISP_IF_CONF));
dev_dbg(mx3fb->dev, "DI_DISP_SIG_POL = 0x%08X\n",
mx3fb_read_reg(mx3fb, DI_DISP_SIG_POL));
dev_dbg(mx3fb->dev, "DI_DISP3_TIME_CONF = 0x%08X\n",
mx3fb_read_reg(mx3fb, DI_DISP3_TIME_CONF));
return 0;
}
/**
* sdc_set_color_key() - set the transparent color key for SDC graphic plane.
* @mx3fb: mx3fb context.
* @channel: IPU DMAC channel ID.
* @enable: boolean to enable or disable color keyl.
* @color_key: 24-bit RGB color to use as transparent color key.
* @return: 0 on success or negative error code on failure.
*/
static int sdc_set_color_key(struct mx3fb_data *mx3fb, enum ipu_channel channel,
bool enable, uint32_t color_key)
{
uint32_t reg, sdc_conf;
unsigned long lock_flags;
spin_lock_irqsave(&mx3fb->lock, lock_flags);
sdc_conf = mx3fb_read_reg(mx3fb, SDC_COM_CONF);
if (channel == IDMAC_SDC_0)
sdc_conf &= ~SDC_COM_GWSEL;
else
sdc_conf |= SDC_COM_GWSEL;
if (enable) {
reg = mx3fb_read_reg(mx3fb, SDC_GW_CTRL) & 0xFF000000L;
mx3fb_write_reg(mx3fb, reg | (color_key & 0x00FFFFFFL),
SDC_GW_CTRL);
sdc_conf |= SDC_COM_KEY_COLOR_G;
} else {
sdc_conf &= ~SDC_COM_KEY_COLOR_G;
}
mx3fb_write_reg(mx3fb, sdc_conf, SDC_COM_CONF);
spin_unlock_irqrestore(&mx3fb->lock, lock_flags);
return 0;
}
/**
* sdc_set_global_alpha() - set global alpha blending modes.
* @mx3fb: mx3fb context.
* @enable: boolean to enable or disable global alpha blending. If disabled,
* per pixel blending is used.
* @alpha: global alpha value.
* @return: 0 on success or negative error code on failure.
*/
static int sdc_set_global_alpha(struct mx3fb_data *mx3fb, bool enable, uint8_t alpha)
{
uint32_t reg;
unsigned long lock_flags;
spin_lock_irqsave(&mx3fb->lock, lock_flags);
if (enable) {
reg = mx3fb_read_reg(mx3fb, SDC_GW_CTRL) & 0x00FFFFFFL;
mx3fb_write_reg(mx3fb, reg | ((uint32_t) alpha << 24), SDC_GW_CTRL);
reg = mx3fb_read_reg(mx3fb, SDC_COM_CONF);
mx3fb_write_reg(mx3fb, reg | SDC_COM_GLB_A, SDC_COM_CONF);
} else {
reg = mx3fb_read_reg(mx3fb, SDC_COM_CONF);
mx3fb_write_reg(mx3fb, reg & ~SDC_COM_GLB_A, SDC_COM_CONF);
}
spin_unlock_irqrestore(&mx3fb->lock, lock_flags);
return 0;
}
static void sdc_set_brightness(struct mx3fb_data *mx3fb, uint8_t value)
{
/* This might be board-specific */
mx3fb_write_reg(mx3fb, 0x03000000UL | value << 16, SDC_PWM_CTRL);
return;
}
static uint32_t bpp_to_pixfmt(int bpp)
{
uint32_t pixfmt = 0;
switch (bpp) {
case 24:
pixfmt = IPU_PIX_FMT_BGR24;
break;
case 32:
pixfmt = IPU_PIX_FMT_BGR32;
break;
case 16:
pixfmt = IPU_PIX_FMT_RGB565;
break;
}
return pixfmt;
}
static int mx3fb_blank(int blank, struct fb_info *fbi);
static int mx3fb_map_video_memory(struct fb_info *fbi);
static int mx3fb_unmap_video_memory(struct fb_info *fbi);
/**
* mx3fb_set_fix() - set fixed framebuffer parameters from variable settings.
* @info: framebuffer information pointer
* @return: 0 on success or negative error code on failure.
*/
static int mx3fb_set_fix(struct fb_info *fbi)
{
struct fb_fix_screeninfo *fix = &fbi->fix;
struct fb_var_screeninfo *var = &fbi->var;
strncpy(fix->id, "DISP3 BG", 8);
fix->line_length = var->xres_virtual * var->bits_per_pixel / 8;
fix->type = FB_TYPE_PACKED_PIXELS;
fix->accel = FB_ACCEL_NONE;
fix->visual = FB_VISUAL_TRUECOLOR;
fix->xpanstep = 1;
fix->ypanstep = 1;
return 0;
}
static void mx3fb_dma_done(void *arg)
{
struct idmac_tx_desc *tx_desc = to_tx_desc(arg);
struct dma_chan *chan = tx_desc->txd.chan;
struct idmac_channel *ichannel = to_idmac_chan(chan);
struct mx3fb_data *mx3fb = ichannel->client;
struct mx3fb_info *mx3_fbi = mx3fb->fbi->par;
dev_dbg(mx3fb->dev, "irq %d callback\n", ichannel->eof_irq);
/* We only need one interrupt, it will be re-enabled as needed */
disable_irq(ichannel->eof_irq);
complete(&mx3_fbi->flip_cmpl);
}
/**
* mx3fb_set_par() - set framebuffer parameters and change the operating mode.
* @fbi: framebuffer information pointer.
* @return: 0 on success or negative error code on failure.
*/
static int mx3fb_set_par(struct fb_info *fbi)
{
u32 mem_len;
struct ipu_di_signal_cfg sig_cfg;
enum ipu_panel mode = IPU_PANEL_TFT;
struct mx3fb_info *mx3_fbi = fbi->par;
struct mx3fb_data *mx3fb = mx3_fbi->mx3fb;
struct idmac_channel *ichan = mx3_fbi->idmac_channel;
struct idmac_video_param *video = &ichan->params.video;
struct scatterlist *sg = mx3_fbi->sg;
size_t screen_size;
dev_dbg(mx3fb->dev, "%s [%c]\n", __func__, list_empty(&ichan->queue) ? '-' : '+');
mutex_lock(&mx3_fbi->mutex);
/* Total cleanup */
if (mx3_fbi->txd)
sdc_disable_channel(mx3_fbi);
mx3fb_set_fix(fbi);
mem_len = fbi->var.yres_virtual * fbi->fix.line_length;
if (mem_len > fbi->fix.smem_len) {
if (fbi->fix.smem_start)
mx3fb_unmap_video_memory(fbi);
fbi->fix.smem_len = mem_len;
if (mx3fb_map_video_memory(fbi) < 0) {
mutex_unlock(&mx3_fbi->mutex);
return -ENOMEM;
}
}
screen_size = fbi->fix.line_length * fbi->var.yres;
sg_init_table(&sg[0], 1);
sg_init_table(&sg[1], 1);
sg_dma_address(&sg[0]) = fbi->fix.smem_start;
sg_set_page(&sg[0], virt_to_page(fbi->screen_base),
fbi->fix.smem_len,
offset_in_page(fbi->screen_base));
if (mx3_fbi->ipu_ch == IDMAC_SDC_0) {
memset(&sig_cfg, 0, sizeof(sig_cfg));
if (fbi->var.sync & FB_SYNC_HOR_HIGH_ACT)
sig_cfg.Hsync_pol = true;
if (fbi->var.sync & FB_SYNC_VERT_HIGH_ACT)
sig_cfg.Vsync_pol = true;
if (fbi->var.sync & FB_SYNC_CLK_INVERT)
sig_cfg.clk_pol = true;
if (fbi->var.sync & FB_SYNC_DATA_INVERT)
sig_cfg.data_pol = true;
if (fbi->var.sync & FB_SYNC_OE_ACT_HIGH)
sig_cfg.enable_pol = true;
if (fbi->var.sync & FB_SYNC_CLK_IDLE_EN)
sig_cfg.clkidle_en = true;
if (fbi->var.sync & FB_SYNC_CLK_SEL_EN)
sig_cfg.clksel_en = true;
if (fbi->var.sync & FB_SYNC_SHARP_MODE)
mode = IPU_PANEL_SHARP_TFT;
dev_dbg(fbi->device, "pixclock = %ul Hz\n",
(u32) (PICOS2KHZ(fbi->var.pixclock) * 1000UL));
if (sdc_init_panel(mx3fb, mode,
(PICOS2KHZ(fbi->var.pixclock)) * 1000UL,
fbi->var.xres, fbi->var.yres,
(fbi->var.sync & FB_SYNC_SWAP_RGB) ?
IPU_PIX_FMT_BGR666 : IPU_PIX_FMT_RGB666,
fbi->var.left_margin,
fbi->var.hsync_len,
fbi->var.right_margin +
fbi->var.hsync_len,
fbi->var.upper_margin,
fbi->var.vsync_len,
fbi->var.lower_margin +
fbi->var.vsync_len, sig_cfg) != 0) {
mutex_unlock(&mx3_fbi->mutex);
dev_err(fbi->device,
"mx3fb: Error initializing panel.\n");
return -EINVAL;
}
}
sdc_set_window_pos(mx3fb, mx3_fbi->ipu_ch, 0, 0);
mx3_fbi->cur_ipu_buf = 0;
video->out_pixel_fmt = bpp_to_pixfmt(fbi->var.bits_per_pixel);
video->out_width = fbi->var.xres;
video->out_height = fbi->var.yres;
video->out_stride = fbi->var.xres_virtual;
if (mx3_fbi->blank == FB_BLANK_UNBLANK)
sdc_enable_channel(mx3_fbi);
mutex_unlock(&mx3_fbi->mutex);
return 0;
}
/**
* mx3fb_check_var() - check and adjust framebuffer variable parameters.
* @var: framebuffer variable parameters
* @fbi: framebuffer information pointer
*/
static int mx3fb_check_var(struct fb_var_screeninfo *var, struct fb_info *fbi)
{
struct mx3fb_info *mx3_fbi = fbi->par;
u32 vtotal;
u32 htotal;
dev_dbg(fbi->device, "%s\n", __func__);
if (var->xres_virtual < var->xres)
var->xres_virtual = var->xres;
if (var->yres_virtual < var->yres)
var->yres_virtual = var->yres;
if ((var->bits_per_pixel != 32) && (var->bits_per_pixel != 24) &&
(var->bits_per_pixel != 16))
var->bits_per_pixel = default_bpp;
switch (var->bits_per_pixel) {
case 16:
var->red.length = 5;
var->red.offset = 11;
var->red.msb_right = 0;
var->green.length = 6;
var->green.offset = 5;
var->green.msb_right = 0;
var->blue.length = 5;
var->blue.offset = 0;
var->blue.msb_right = 0;
var->transp.length = 0;
var->transp.offset = 0;
var->transp.msb_right = 0;
break;
case 24:
var->red.length = 8;
var->red.offset = 16;
var->red.msb_right = 0;
var->green.length = 8;
var->green.offset = 8;
var->green.msb_right = 0;
var->blue.length = 8;
var->blue.offset = 0;
var->blue.msb_right = 0;
var->transp.length = 0;
var->transp.offset = 0;
var->transp.msb_right = 0;
break;
case 32:
var->red.length = 8;
var->red.offset = 16;
var->red.msb_right = 0;
var->green.length = 8;
var->green.offset = 8;
var->green.msb_right = 0;
var->blue.length = 8;
var->blue.offset = 0;
var->blue.msb_right = 0;
var->transp.length = 8;
var->transp.offset = 24;
var->transp.msb_right = 0;
break;
}
if (var->pixclock < 1000) {
htotal = var->xres + var->right_margin + var->hsync_len +
var->left_margin;
vtotal = var->yres + var->lower_margin + var->vsync_len +
var->upper_margin;
var->pixclock = (vtotal * htotal * 6UL) / 100UL;
var->pixclock = KHZ2PICOS(var->pixclock);
dev_dbg(fbi->device, "pixclock set for 60Hz refresh = %u ps\n",
var->pixclock);
}
var->height = -1;
var->width = -1;
var->grayscale = 0;
/* Preserve sync flags */
var->sync |= mx3_fbi->sync;
mx3_fbi->sync |= var->sync;
return 0;
}
static u32 chan_to_field(unsigned int chan, struct fb_bitfield *bf)
{
chan &= 0xffff;
chan >>= 16 - bf->length;
return chan << bf->offset;
}
static int mx3fb_setcolreg(unsigned int regno, unsigned int red,
unsigned int green, unsigned int blue,
unsigned int trans, struct fb_info *fbi)
{
struct mx3fb_info *mx3_fbi = fbi->par;
u32 val;
int ret = 1;
dev_dbg(fbi->device, "%s\n", __func__);
mutex_lock(&mx3_fbi->mutex);
/*
* If greyscale is true, then we convert the RGB value
* to greyscale no matter what visual we are using.
*/
if (fbi->var.grayscale)
red = green = blue = (19595 * red + 38470 * green +
7471 * blue) >> 16;
switch (fbi->fix.visual) {
case FB_VISUAL_TRUECOLOR:
/*
* 16-bit True Colour. We encode the RGB value
* according to the RGB bitfield information.
*/
if (regno < 16) {
u32 *pal = fbi->pseudo_palette;
val = chan_to_field(red, &fbi->var.red);
val |= chan_to_field(green, &fbi->var.green);
val |= chan_to_field(blue, &fbi->var.blue);
pal[regno] = val;
ret = 0;
}
break;
case FB_VISUAL_STATIC_PSEUDOCOLOR:
case FB_VISUAL_PSEUDOCOLOR:
break;
}
mutex_unlock(&mx3_fbi->mutex);
return ret;
}
/**
* mx3fb_blank() - blank the display.
*/
static int mx3fb_blank(int blank, struct fb_info *fbi)
{
struct mx3fb_info *mx3_fbi = fbi->par;
struct mx3fb_data *mx3fb = mx3_fbi->mx3fb;
dev_dbg(fbi->device, "%s\n", __func__);
dev_dbg(fbi->device, "blank = %d\n", blank);
if (mx3_fbi->blank == blank)
return 0;
mutex_lock(&mx3_fbi->mutex);
mx3_fbi->blank = blank;
switch (blank) {
case FB_BLANK_POWERDOWN:
case FB_BLANK_VSYNC_SUSPEND:
case FB_BLANK_HSYNC_SUSPEND:
case FB_BLANK_NORMAL:
sdc_disable_channel(mx3_fbi);
sdc_set_brightness(mx3fb, 0);
break;
case FB_BLANK_UNBLANK:
sdc_enable_channel(mx3_fbi);
sdc_set_brightness(mx3fb, mx3fb->backlight_level);
break;
}
mutex_unlock(&mx3_fbi->mutex);
return 0;
}
/**
* mx3fb_pan_display() - pan or wrap the display
* @var: variable screen buffer information.
* @info: framebuffer information pointer.
*
* We look only at xoffset, yoffset and the FB_VMODE_YWRAP flag
*/
static int mx3fb_pan_display(struct fb_var_screeninfo *var,
struct fb_info *fbi)
{
struct mx3fb_info *mx3_fbi = fbi->par;
u32 y_bottom;
unsigned long base;
off_t offset;
dma_cookie_t cookie;
struct scatterlist *sg = mx3_fbi->sg;
struct dma_chan *dma_chan = &mx3_fbi->idmac_channel->dma_chan;
struct dma_async_tx_descriptor *txd;
int ret;
dev_dbg(fbi->device, "%s [%c]\n", __func__,
list_empty(&mx3_fbi->idmac_channel->queue) ? '-' : '+');
if (var->xoffset > 0) {
dev_dbg(fbi->device, "x panning not supported\n");
return -EINVAL;
}
if (fbi->var.xoffset == var->xoffset &&
fbi->var.yoffset == var->yoffset)
return 0; /* No change, do nothing */
y_bottom = var->yoffset;
if (!(var->vmode & FB_VMODE_YWRAP))
y_bottom += var->yres;
if (y_bottom > fbi->var.yres_virtual)
return -EINVAL;
mutex_lock(&mx3_fbi->mutex);
offset = (var->yoffset * var->xres_virtual + var->xoffset) *
(var->bits_per_pixel / 8);
base = fbi->fix.smem_start + offset;
dev_dbg(fbi->device, "Updating SDC BG buf %d address=0x%08lX\n",
mx3_fbi->cur_ipu_buf, base);
/*
* We enable the End of Frame interrupt, which will free a tx-descriptor,
* which we will need for the next device_prep_slave_sg(). The
* IRQ-handler will disable the IRQ again.
*/
init_completion(&mx3_fbi->flip_cmpl);
enable_irq(mx3_fbi->idmac_channel->eof_irq);
ret = wait_for_completion_timeout(&mx3_fbi->flip_cmpl, HZ / 10);
if (ret <= 0) {
mutex_unlock(&mx3_fbi->mutex);
dev_info(fbi->device, "Panning failed due to %s\n", ret < 0 ?
"user interrupt" : "timeout");
return ret ? : -ETIMEDOUT;
}
mx3_fbi->cur_ipu_buf = !mx3_fbi->cur_ipu_buf;
sg_dma_address(&sg[mx3_fbi->cur_ipu_buf]) = base;
sg_set_page(&sg[mx3_fbi->cur_ipu_buf],
virt_to_page(fbi->screen_base + offset), fbi->fix.smem_len,
offset_in_page(fbi->screen_base + offset));
txd = dma_chan->device->device_prep_slave_sg(dma_chan, sg +
mx3_fbi->cur_ipu_buf, 1, DMA_TO_DEVICE, DMA_PREP_INTERRUPT);
if (!txd) {
dev_err(fbi->device,
"Error preparing a DMA transaction descriptor.\n");
mutex_unlock(&mx3_fbi->mutex);
return -EIO;
}
txd->callback_param = txd;
txd->callback = mx3fb_dma_done;
/*
* Emulate original mx3fb behaviour: each new call to idmac_tx_submit()
* should switch to another buffer
*/
cookie = txd->tx_submit(txd);
dev_dbg(fbi->device, "%d: Submit %p #%d\n", __LINE__, txd, cookie);
if (cookie < 0) {
dev_err(fbi->device,
"Error updating SDC buf %d to address=0x%08lX\n",
mx3_fbi->cur_ipu_buf, base);
mutex_unlock(&mx3_fbi->mutex);
return -EIO;
}
if (mx3_fbi->txd)
async_tx_ack(mx3_fbi->txd);
mx3_fbi->txd = txd;
fbi->var.xoffset = var->xoffset;
fbi->var.yoffset = var->yoffset;
if (var->vmode & FB_VMODE_YWRAP)
fbi->var.vmode |= FB_VMODE_YWRAP;
else
fbi->var.vmode &= ~FB_VMODE_YWRAP;
mutex_unlock(&mx3_fbi->mutex);
dev_dbg(fbi->device, "Update complete\n");
return 0;
}
/*
* This structure contains the pointers to the control functions that are
* invoked by the core framebuffer driver to perform operations like
* blitting, rectangle filling, copy regions and cursor definition.
*/
static struct fb_ops mx3fb_ops = {
.owner = THIS_MODULE,
.fb_set_par = mx3fb_set_par,
.fb_check_var = mx3fb_check_var,
.fb_setcolreg = mx3fb_setcolreg,
.fb_pan_display = mx3fb_pan_display,
.fb_fillrect = cfb_fillrect,
.fb_copyarea = cfb_copyarea,
.fb_imageblit = cfb_imageblit,
.fb_blank = mx3fb_blank,
};
#ifdef CONFIG_PM
/*
* Power management hooks. Note that we won't be called from IRQ context,
* unlike the blank functions above, so we may sleep.
*/
/*
* Suspends the framebuffer and blanks the screen. Power management support
*/
static int mx3fb_suspend(struct platform_device *pdev, pm_message_t state)
{
struct mx3fb_data *drv_data = platform_get_drvdata(pdev);
struct mx3fb_info *mx3_fbi = drv_data->fbi->par;
acquire_console_sem();
fb_set_suspend(drv_data->fbi, 1);
release_console_sem();
if (mx3_fbi->blank == FB_BLANK_UNBLANK) {
sdc_disable_channel(mx3_fbi);
sdc_set_brightness(mx3fb, 0);
}
return 0;
}
/*
* Resumes the framebuffer and unblanks the screen. Power management support
*/
static int mx3fb_resume(struct platform_device *pdev)
{
struct mx3fb_data *drv_data = platform_get_drvdata(pdev);
struct mx3fb_info *mx3_fbi = drv_data->fbi->par;
if (mx3_fbi->blank == FB_BLANK_UNBLANK) {
sdc_enable_channel(mx3_fbi);
sdc_set_brightness(mx3fb, drv_data->backlight_level);
}
acquire_console_sem();
fb_set_suspend(drv_data->fbi, 0);
release_console_sem();
return 0;
}
#else
#define mx3fb_suspend NULL
#define mx3fb_resume NULL
#endif
/*
* Main framebuffer functions
*/
/**
* mx3fb_map_video_memory() - allocates the DRAM memory for the frame buffer.
* @fbi: framebuffer information pointer
* @return: Error code indicating success or failure
*
* This buffer is remapped into a non-cached, non-buffered, memory region to
* allow palette and pixel writes to occur without flushing the cache. Once this
* area is remapped, all virtual memory access to the video memory should occur
* at the new region.
*/
static int mx3fb_map_video_memory(struct fb_info *fbi)
{
int retval = 0;
dma_addr_t addr;
fbi->screen_base = dma_alloc_writecombine(fbi->device,
fbi->fix.smem_len,
&addr, GFP_DMA);
if (!fbi->screen_base) {
dev_err(fbi->device, "Cannot allocate %u bytes framebuffer memory\n",
fbi->fix.smem_len);
retval = -EBUSY;
goto err0;
}
fbi->fix.smem_start = addr;
dev_dbg(fbi->device, "allocated fb @ p=0x%08x, v=0x%p, size=%d.\n",
(uint32_t) fbi->fix.smem_start, fbi->screen_base, fbi->fix.smem_len);
fbi->screen_size = fbi->fix.smem_len;
/* Clear the screen */
memset((char *)fbi->screen_base, 0, fbi->fix.smem_len);
return 0;
err0:
fbi->fix.smem_len = 0;
fbi->fix.smem_start = 0;
fbi->screen_base = NULL;
return retval;
}
/**
* mx3fb_unmap_video_memory() - de-allocate frame buffer memory.
* @fbi: framebuffer information pointer
* @return: error code indicating success or failure
*/
static int mx3fb_unmap_video_memory(struct fb_info *fbi)
{
dma_free_writecombine(fbi->device, fbi->fix.smem_len,
fbi->screen_base, fbi->fix.smem_start);
fbi->screen_base = 0;
fbi->fix.smem_start = 0;
fbi->fix.smem_len = 0;
return 0;
}
/**
* mx3fb_init_fbinfo() - initialize framebuffer information object.
* @return: initialized framebuffer structure.
*/
static struct fb_info *mx3fb_init_fbinfo(struct device *dev, struct fb_ops *ops)
{
struct fb_info *fbi;
struct mx3fb_info *mx3fbi;
int ret;
/* Allocate sufficient memory for the fb structure */
fbi = framebuffer_alloc(sizeof(struct mx3fb_info), dev);
if (!fbi)
return NULL;
mx3fbi = fbi->par;
mx3fbi->cookie = -EINVAL;
mx3fbi->cur_ipu_buf = 0;
fbi->var.activate = FB_ACTIVATE_NOW;
fbi->fbops = ops;
fbi->flags = FBINFO_FLAG_DEFAULT;
fbi->pseudo_palette = mx3fbi->pseudo_palette;
mutex_init(&mx3fbi->mutex);
/* Allocate colormap */
ret = fb_alloc_cmap(&fbi->cmap, 16, 0);
if (ret < 0) {
framebuffer_release(fbi);
return NULL;
}
return fbi;
}
static int init_fb_chan(struct mx3fb_data *mx3fb, struct idmac_channel *ichan)
{
struct device *dev = mx3fb->dev;
struct mx3fb_platform_data *mx3fb_pdata = dev->platform_data;
const char *name = mx3fb_pdata->name;
unsigned int irq;
struct fb_info *fbi;
struct mx3fb_info *mx3fbi;
const struct fb_videomode *mode;
int ret, num_modes;
ichan->client = mx3fb;
irq = ichan->eof_irq;
if (ichan->dma_chan.chan_id != IDMAC_SDC_0)
return -EINVAL;
fbi = mx3fb_init_fbinfo(dev, &mx3fb_ops);
if (!fbi)
return -ENOMEM;
if (!fb_mode)
fb_mode = name;
if (!fb_mode) {
ret = -EINVAL;
goto emode;
}
if (mx3fb_pdata->mode && mx3fb_pdata->num_modes) {
mode = mx3fb_pdata->mode;
num_modes = mx3fb_pdata->num_modes;
} else {
mode = mx3fb_modedb;
num_modes = ARRAY_SIZE(mx3fb_modedb);
}
if (!fb_find_mode(&fbi->var, fbi, fb_mode, mode,
num_modes, NULL, default_bpp)) {
ret = -EBUSY;
goto emode;
}
fb_videomode_to_modelist(mode, num_modes, &fbi->modelist);
/* Default Y virtual size is 2x panel size */
fbi->var.yres_virtual = fbi->var.yres * 2;
mx3fb->fbi = fbi;
/* set Display Interface clock period */
mx3fb_write_reg(mx3fb, 0x00100010L, DI_HSP_CLK_PER);
/* Might need to trigger HSP clock change - see 44.3.3.8.5 */
sdc_set_brightness(mx3fb, 255);
sdc_set_global_alpha(mx3fb, true, 0xFF);
sdc_set_color_key(mx3fb, IDMAC_SDC_0, false, 0);
mx3fbi = fbi->par;
mx3fbi->idmac_channel = ichan;
mx3fbi->ipu_ch = ichan->dma_chan.chan_id;
mx3fbi->mx3fb = mx3fb;
mx3fbi->blank = FB_BLANK_NORMAL;
init_completion(&mx3fbi->flip_cmpl);
disable_irq(ichan->eof_irq);
dev_dbg(mx3fb->dev, "disabling irq %d\n", ichan->eof_irq);
ret = mx3fb_set_par(fbi);
if (ret < 0)
goto esetpar;
mx3fb_blank(FB_BLANK_UNBLANK, fbi);
dev_info(dev, "mx3fb: fb registered, using mode %s\n", fb_mode);
ret = register_framebuffer(fbi);
if (ret < 0)
goto erfb;
return 0;
erfb:
esetpar:
emode:
fb_dealloc_cmap(&fbi->cmap);
framebuffer_release(fbi);
return ret;
}
static bool chan_filter(struct dma_chan *chan, void *arg)
{
struct dma_chan_request *rq = arg;
struct device *dev;
struct mx3fb_platform_data *mx3fb_pdata;
if (!rq)
return false;
dev = rq->mx3fb->dev;
mx3fb_pdata = dev->platform_data;
return rq->id == chan->chan_id &&
mx3fb_pdata->dma_dev == chan->device->dev;
}
static void release_fbi(struct fb_info *fbi)
{
mx3fb_unmap_video_memory(fbi);
fb_dealloc_cmap(&fbi->cmap);
unregister_framebuffer(fbi);
framebuffer_release(fbi);
}
static int mx3fb_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
int ret;
struct resource *sdc_reg;
struct mx3fb_data *mx3fb;
dma_cap_mask_t mask;
struct dma_chan *chan;
struct dma_chan_request rq;
/*
* Display Interface (DI) and Synchronous Display Controller (SDC)
* registers
*/
sdc_reg = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!sdc_reg)
return -EINVAL;
mx3fb = kzalloc(sizeof(*mx3fb), GFP_KERNEL);
if (!mx3fb)
return -ENOMEM;
spin_lock_init(&mx3fb->lock);
mx3fb->reg_base = ioremap(sdc_reg->start, resource_size(sdc_reg));
if (!mx3fb->reg_base) {
ret = -ENOMEM;
goto eremap;
}
pr_debug("Remapped %x to %x at %p\n", sdc_reg->start, sdc_reg->end,
mx3fb->reg_base);
/* IDMAC interface */
dmaengine_get();
mx3fb->dev = dev;
platform_set_drvdata(pdev, mx3fb);
rq.mx3fb = mx3fb;
dma_cap_zero(mask);
dma_cap_set(DMA_SLAVE, mask);
dma_cap_set(DMA_PRIVATE, mask);
rq.id = IDMAC_SDC_0;
chan = dma_request_channel(mask, chan_filter, &rq);
if (!chan) {
ret = -EBUSY;
goto ersdc0;
}
ret = init_fb_chan(mx3fb, to_idmac_chan(chan));
if (ret < 0)
goto eisdc0;
mx3fb->backlight_level = 255;
return 0;
eisdc0:
dma_release_channel(chan);
ersdc0:
dmaengine_put();
iounmap(mx3fb->reg_base);
eremap:
kfree(mx3fb);
dev_err(dev, "mx3fb: failed to register fb\n");
return ret;
}
static int mx3fb_remove(struct platform_device *dev)
{
struct mx3fb_data *mx3fb = platform_get_drvdata(dev);
struct fb_info *fbi = mx3fb->fbi;
struct mx3fb_info *mx3_fbi = fbi->par;
struct dma_chan *chan;
chan = &mx3_fbi->idmac_channel->dma_chan;
release_fbi(fbi);
dma_release_channel(chan);
dmaengine_put();
iounmap(mx3fb->reg_base);
kfree(mx3fb);
return 0;
}
static struct platform_driver mx3fb_driver = {
.driver = {
.name = MX3FB_NAME,
},
.probe = mx3fb_probe,
.remove = mx3fb_remove,
.suspend = mx3fb_suspend,
.resume = mx3fb_resume,
};
/*
* Parse user specified options (`video=mx3fb:')
* example:
* video=mx3fb:bpp=16
*/
static int mx3fb_setup(void)
{
#ifndef MODULE
char *opt, *options = NULL;
if (fb_get_options("mx3fb", &options))
return -ENODEV;
if (!options || !*options)
return 0;
while ((opt = strsep(&options, ",")) != NULL) {
if (!*opt)
continue;
if (!strncmp(opt, "bpp=", 4))
default_bpp = simple_strtoul(opt + 4, NULL, 0);
else
fb_mode = opt;
}
#endif
return 0;
}
static int __init mx3fb_init(void)
{
int ret = mx3fb_setup();
if (ret < 0)
return ret;
ret = platform_driver_register(&mx3fb_driver);
return ret;
}
static void __exit mx3fb_exit(void)
{
platform_driver_unregister(&mx3fb_driver);
}
module_init(mx3fb_init);
module_exit(mx3fb_exit);
MODULE_AUTHOR("Freescale Semiconductor, Inc.");
MODULE_DESCRIPTION("MX3 framebuffer driver");
MODULE_ALIAS("platform:" MX3FB_NAME);
MODULE_LICENSE("GPL v2");
include/linux/dmaengine.h
View file @ 7954d5cf
...@@ -297,6 +297,11 @@ static inline void async_tx_ack(struct dma_async_tx_descriptor *tx) ...@@ -297,6 +297,11 @@ static inline void async_tx_ack(struct dma_async_tx_descriptor *tx)
tx->flags |= DMA_CTRL_ACK; tx->flags |= DMA_CTRL_ACK;
} }
static inline void async_tx_clear_ack(struct dma_async_tx_descriptor *tx)
{
tx->flags &= ~DMA_CTRL_ACK;
}
static inline bool async_tx_test_ack(struct dma_async_tx_descriptor *tx) static inline bool async_tx_test_ack(struct dma_async_tx_descriptor *tx)
{ {
return (tx->flags & DMA_CTRL_ACK) == DMA_CTRL_ACK; return (tx->flags & DMA_CTRL_ACK) == DMA_CTRL_ACK;
...@@ -400,11 +405,16 @@ static inline enum dma_status dma_async_is_complete(dma_cookie_t cookie, ...@@ -400,11 +405,16 @@ static inline enum dma_status dma_async_is_complete(dma_cookie_t cookie,
enum dma_status dma_sync_wait(struct dma_chan *chan, dma_cookie_t cookie); enum dma_status dma_sync_wait(struct dma_chan *chan, dma_cookie_t cookie);
#ifdef CONFIG_DMA_ENGINE #ifdef CONFIG_DMA_ENGINE
enum dma_status dma_wait_for_async_tx(struct dma_async_tx_descriptor *tx); enum dma_status dma_wait_for_async_tx(struct dma_async_tx_descriptor *tx);
void dma_issue_pending_all(void);
#else #else
static inline enum dma_status dma_wait_for_async_tx(struct dma_async_tx_descriptor *tx) static inline enum dma_status dma_wait_for_async_tx(struct dma_async_tx_descriptor *tx)
{ {
return DMA_SUCCESS; return DMA_SUCCESS;
} }
static inline void dma_issue_pending_all(void)
{
do { } while (0);
}
#endif #endif
/* --- DMA device --- */ /* --- DMA device --- */
...@@ -413,7 +423,6 @@ int dma_async_device_register(struct dma_device *device); ...@@ -413,7 +423,6 @@ int dma_async_device_register(struct dma_device *device);
void dma_async_device_unregister(struct dma_device *device); void dma_async_device_unregister(struct dma_device *device);
void dma_run_dependencies(struct dma_async_tx_descriptor *tx); void dma_run_dependencies(struct dma_async_tx_descriptor *tx);
struct dma_chan *dma_find_channel(enum dma_transaction_type tx_type); struct dma_chan *dma_find_channel(enum dma_transaction_type tx_type);
void dma_issue_pending_all(void);
#define dma_request_channel(mask, x, y) __dma_request_channel(&(mask), x, y) #define dma_request_channel(mask, x, y) __dma_request_channel(&(mask), x, y)
struct dma_chan *__dma_request_channel(dma_cap_mask_t *mask, dma_filter_fn fn, void *fn_param); struct dma_chan *__dma_request_channel(dma_cap_mask_t *mask, dma_filter_fn fn, void *fn_param);
void dma_release_channel(struct dma_chan *chan); void dma_release_channel(struct dma_chan *chan);
......
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