2 * Copyright 2008-2010 Freescale Semiconductor, Inc. All Rights Reserved.
4 * The code contained herein is licensed under the GNU General Public
5 * License. You may obtain a copy of the GNU General Public License
6 * Version 2 or later at the following locations:
8 * http://www.opensource.org/licenses/gpl-license.html
9 * http://www.gnu.org/copyleft/gpl.html
12 #include <linux/export.h>
13 #include <linux/types.h>
14 #include <linux/init.h>
16 #include <linux/errno.h>
17 #include <linux/spinlock.h>
18 #include <linux/delay.h>
19 #include <linux/clk.h>
20 #include <video/imx-ipu-v3.h>
24 struct ipu_smfc_priv {
30 #define SMFC_MAP 0x0000
31 #define SMFC_WMC 0x0004
32 #define SMFC_BS 0x0008
34 int ipu_smfc_set_burstsize(struct ipu_soc *ipu, int channel, int burstsize)
36 struct ipu_smfc_priv *smfc = ipu->smfc_priv;
40 spin_lock_irqsave(&smfc->lock, flags);
43 val = readl(smfc->base + SMFC_BS);
44 val &= ~(0xf << shift);
45 val |= burstsize << shift;
46 writel(val, smfc->base + SMFC_BS);
48 spin_unlock_irqrestore(&smfc->lock, flags);
52 EXPORT_SYMBOL_GPL(ipu_smfc_set_burstsize);
54 int ipu_smfc_map_channel(struct ipu_soc *ipu, int channel, int csi_id, int mipi_id)
56 struct ipu_smfc_priv *smfc = ipu->smfc_priv;
60 spin_lock_irqsave(&smfc->lock, flags);
63 val = readl(smfc->base + SMFC_MAP);
64 val &= ~(0x7 << shift);
65 val |= ((csi_id << 2) | mipi_id) << shift;
66 writel(val, smfc->base + SMFC_MAP);
68 spin_unlock_irqrestore(&smfc->lock, flags);
72 EXPORT_SYMBOL_GPL(ipu_smfc_map_channel);
74 int ipu_smfc_init(struct ipu_soc *ipu, struct device *dev,
77 struct ipu_smfc_priv *smfc;
79 smfc = devm_kzalloc(dev, sizeof(*smfc), GFP_KERNEL);
83 ipu->smfc_priv = smfc;
84 spin_lock_init(&smfc->lock);
86 smfc->base = devm_ioremap(dev, base, PAGE_SIZE);
90 pr_debug("%s: ioremap 0x%08lx -> %p\n", __func__, base, smfc->base);
95 void ipu_smfc_exit(struct ipu_soc *ipu)