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-rw-r--r--drivers/dma/Kconfig19
-rw-r--r--drivers/dma/Makefile1
-rw-r--r--drivers/dma/dmaengine.c8
-rw-r--r--drivers/dma/dmatest.c35
-rw-r--r--drivers/dma/fsldma.c8
-rw-r--r--drivers/dma/ipu/Makefile1
-rw-r--r--drivers/dma/ipu/ipu_idmac.c1740
-rw-r--r--drivers/dma/ipu/ipu_intern.h176
-rw-r--r--drivers/dma/ipu/ipu_irq.c413
9 files changed, 2388 insertions, 13 deletions
diff --git a/drivers/dma/Kconfig b/drivers/dma/Kconfig
index e34b0642081..48ea59e7967 100644
--- a/drivers/dma/Kconfig
+++ b/drivers/dma/Kconfig
@@ -62,6 +62,25 @@ config MV_XOR
---help---
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
bool
diff --git a/drivers/dma/Makefile b/drivers/dma/Makefile
index 14f59527d4f..2e5dc96700d 100644
--- a/drivers/dma/Makefile
+++ b/drivers/dma/Makefile
@@ -7,3 +7,4 @@ obj-$(CONFIG_INTEL_IOP_ADMA) += iop-adma.o
obj-$(CONFIG_FSL_DMA) += fsldma.o
obj-$(CONFIG_MV_XOR) += mv_xor.o
obj-$(CONFIG_DW_DMAC) += dw_dmac.o
+obj-$(CONFIG_MX3_IPU) += ipu/
diff --git a/drivers/dma/dmaengine.c b/drivers/dma/dmaengine.c
index 403dbe78112..a58993011ed 100644
--- a/drivers/dma/dmaengine.c
+++ b/drivers/dma/dmaengine.c
@@ -329,9 +329,6 @@ struct dma_chan *dma_find_channel(enum dma_transaction_type tx_type)
struct dma_chan *chan;
int cpu;
- WARN_ONCE(dmaengine_ref_count == 0,
- "client called %s without a reference", __func__);
-
cpu = get_cpu();
chan = per_cpu_ptr(channel_table[tx_type], cpu)->chan;
put_cpu();
@@ -348,9 +345,6 @@ void dma_issue_pending_all(void)
struct dma_device *device;
struct dma_chan *chan;
- WARN_ONCE(dmaengine_ref_count == 0,
- "client called %s without a reference", __func__);
-
rcu_read_lock();
list_for_each_entry_rcu(device, &dma_device_list, global_node) {
if (dma_has_cap(DMA_PRIVATE, device->cap_mask))
@@ -961,6 +955,8 @@ void dma_run_dependencies(struct dma_async_tx_descriptor *tx)
if (!dep)
return;
+ /* we'll submit tx->next now, so clear the link */
+ tx->next = NULL;
chan = dep->chan;
/* keep submitting up until a channel switch is detected
diff --git a/drivers/dma/dmatest.c b/drivers/dma/dmatest.c
index 3603f1ea5b2..732fa1ec36a 100644
--- a/drivers/dma/dmatest.c
+++ b/drivers/dma/dmatest.c
@@ -217,6 +217,10 @@ static int dmatest_func(void *data)
chan = thread->chan;
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++;
len = dmatest_random() % test_buf_size + 1;
@@ -226,10 +230,30 @@ static int dmatest_func(void *data)
dmatest_init_srcbuf(thread->srcbuf, src_off, len);
dmatest_init_dstbuf(thread->dstbuf, dst_off, len);
- cookie = dma_async_memcpy_buf_to_buf(chan,
- thread->dstbuf + dst_off,
- thread->srcbuf + src_off,
- len);
+ dma_src = dma_map_single(dev->dev, thread->srcbuf + src_off,
+ len, DMA_TO_DEVICE);
+ /* map with DMA_BIDIRECTIONAL to force writeback/invalidate */
+ 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)) {
pr_warning("%s: #%u: submit error %d with src_off=0x%x "
"dst_off=0x%x len=0x%x\n",
@@ -253,6 +277,9 @@ static int dmatest_func(void *data)
failed_tests++;
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;
diff --git a/drivers/dma/fsldma.c b/drivers/dma/fsldma.c
index ca70a21afc6..70126a60623 100644
--- a/drivers/dma/fsldma.c
+++ b/drivers/dma/fsldma.c
@@ -822,7 +822,7 @@ static int __devinit fsl_dma_chan_probe(struct fsl_dma_device *fdev,
*/
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.end - new_fsl_chan->reg.start + 1);
@@ -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,
- compatible, new_fsl_chan->irq);
+ compatible,
+ new_fsl_chan->irq != NO_IRQ ? new_fsl_chan->irq : fdev->irq);
return 0;
@@ -890,7 +891,8 @@ err_no_reg:
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);
iounmap(fchan->reg_base);
kfree(fchan);
diff --git a/drivers/dma/ipu/Makefile b/drivers/dma/ipu/Makefile
new file mode 100644
index 00000000000..6704cf48326
--- /dev/null
+++ b/drivers/dma/ipu/Makefile
@@ -0,0 +1 @@
+obj-y += ipu_irq.o ipu_idmac.o
diff --git a/drivers/dma/ipu/ipu_idmac.c b/drivers/dma/ipu/ipu_idmac.c
new file mode 100644
index 00000000000..1f154d08e98
--- /dev/null
+++ b/drivers/dma/ipu/ipu_idmac.c
@@ -0,0 +1,1740 @@
+/*
+ * 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");
diff --git a/drivers/dma/ipu/ipu_intern.h b/drivers/dma/ipu/ipu_intern.h
new file mode 100644
index 00000000000..545cf11a94a
--- /dev/null
+++ b/drivers/dma/ipu/ipu_intern.h
@@ -0,0 +1,176 @@
+/*
+ * 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
diff --git a/drivers/dma/ipu/ipu_irq.c b/drivers/dma/ipu/ipu_irq.c
new file mode 100644
index 00000000000..83f532cc767
--- /dev/null
+++ b/drivers/dma/ipu/ipu_irq.c
@@ -0,0 +1,413 @@
+/*
+ * 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);
+ }
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-03 01:55:49 +0000