Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * Copyright 2008-2010 Freescale Semiconductor, Inc. All Rights Reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5) #include <linux/export.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #include <linux/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <linux/spinlock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/clk.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <video/imx-ipu-v3.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include "ipu-prv.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) struct ipu_smfc {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) 	struct ipu_smfc_priv *priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) 	int chno;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) 	bool inuse;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) struct ipu_smfc_priv {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 	void __iomem *base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 	spinlock_t lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 	struct ipu_soc *ipu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 	struct ipu_smfc channel[4];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 	int use_count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) /*SMFC Registers */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) #define SMFC_MAP	0x0000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) #define SMFC_WMC	0x0004
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) #define SMFC_BS		0x0008
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) int ipu_smfc_set_burstsize(struct ipu_smfc *smfc, int burstsize)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 	struct ipu_smfc_priv *priv = smfc->priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 	unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	u32 val, shift;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 	spin_lock_irqsave(&priv->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 	shift = smfc->chno * 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 	val = readl(priv->base + SMFC_BS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	val &= ~(0xf << shift);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	val |= burstsize << shift;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	writel(val, priv->base + SMFC_BS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	spin_unlock_irqrestore(&priv->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) EXPORT_SYMBOL_GPL(ipu_smfc_set_burstsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) int ipu_smfc_map_channel(struct ipu_smfc *smfc, int csi_id, int mipi_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 	struct ipu_smfc_priv *priv = smfc->priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 	unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	u32 val, shift;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	spin_lock_irqsave(&priv->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 	shift = smfc->chno * 3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	val = readl(priv->base + SMFC_MAP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	val &= ~(0x7 << shift);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	val |= ((csi_id << 2) | mipi_id) << shift;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 	writel(val, priv->base + SMFC_MAP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 	spin_unlock_irqrestore(&priv->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) EXPORT_SYMBOL_GPL(ipu_smfc_map_channel);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) int ipu_smfc_set_watermark(struct ipu_smfc *smfc, u32 set_level, u32 clr_level)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	struct ipu_smfc_priv *priv = smfc->priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 	unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	u32 val, shift;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 	spin_lock_irqsave(&priv->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	shift = smfc->chno * 6 + (smfc->chno > 1 ? 4 : 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 	val = readl(priv->base + SMFC_WMC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 	val &= ~(0x3f << shift);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 	val |= ((clr_level << 3) | set_level) << shift;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	writel(val, priv->base + SMFC_WMC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 	spin_unlock_irqrestore(&priv->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) EXPORT_SYMBOL_GPL(ipu_smfc_set_watermark);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) int ipu_smfc_enable(struct ipu_smfc *smfc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 	struct ipu_smfc_priv *priv = smfc->priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 	unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	spin_lock_irqsave(&priv->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	if (!priv->use_count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 		ipu_module_enable(priv->ipu, IPU_CONF_SMFC_EN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	priv->use_count++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	spin_unlock_irqrestore(&priv->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) EXPORT_SYMBOL_GPL(ipu_smfc_enable);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) int ipu_smfc_disable(struct ipu_smfc *smfc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 	struct ipu_smfc_priv *priv = smfc->priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 	spin_lock_irqsave(&priv->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	priv->use_count--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	if (!priv->use_count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 		ipu_module_disable(priv->ipu, IPU_CONF_SMFC_EN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 	if (priv->use_count < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 		priv->use_count = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	spin_unlock_irqrestore(&priv->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) EXPORT_SYMBOL_GPL(ipu_smfc_disable);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) struct ipu_smfc *ipu_smfc_get(struct ipu_soc *ipu, unsigned int chno)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	struct ipu_smfc_priv *priv = ipu->smfc_priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	struct ipu_smfc *smfc, *ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	if (chno >= 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 		return ERR_PTR(-EINVAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	smfc = &priv->channel[chno];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 	ret = smfc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	spin_lock_irqsave(&priv->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 	if (smfc->inuse) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 		ret = ERR_PTR(-EBUSY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 		goto unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	smfc->inuse = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) unlock:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 	spin_unlock_irqrestore(&priv->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) EXPORT_SYMBOL_GPL(ipu_smfc_get);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) void ipu_smfc_put(struct ipu_smfc *smfc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 	struct ipu_smfc_priv *priv = smfc->priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 	unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 	spin_lock_irqsave(&priv->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	smfc->inuse = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 	spin_unlock_irqrestore(&priv->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) EXPORT_SYMBOL_GPL(ipu_smfc_put);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) int ipu_smfc_init(struct ipu_soc *ipu, struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 		  unsigned long base)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 	struct ipu_smfc_priv *priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 	if (!priv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	ipu->smfc_priv = priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	spin_lock_init(&priv->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 	priv->ipu = ipu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 	priv->base = devm_ioremap(dev, base, PAGE_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	if (!priv->base)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 	for (i = 0; i < 4; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 		priv->channel[i].priv = priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 		priv->channel[i].chno = i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 	pr_debug("%s: ioremap 0x%08lx -> %p\n", __func__, base, priv->base);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) void ipu_smfc_exit(struct ipu_soc *ipu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) }