Thomas Gleixner | c942fdd | 2019-05-27 08:55:06 +0200 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
Sascha Hauer | aecfbdb | 2012-09-21 10:07:49 +0200 | [diff] [blame] | 2 | /* |
| 3 | * Copyright (c) 2010 Sascha Hauer <s.hauer@pengutronix.de> |
| 4 | * Copyright (C) 2005-2009 Freescale Semiconductor, Inc. |
Sascha Hauer | aecfbdb | 2012-09-21 10:07:49 +0200 | [diff] [blame] | 5 | */ |
| 6 | #include <linux/export.h> |
| 7 | #include <linux/types.h> |
| 8 | #include <linux/errno.h> |
| 9 | #include <linux/io.h> |
| 10 | |
Philipp Zabel | 39b9004 | 2013-09-30 16:13:39 +0200 | [diff] [blame] | 11 | #include <video/imx-ipu-v3.h> |
Sascha Hauer | aecfbdb | 2012-09-21 10:07:49 +0200 | [diff] [blame] | 12 | #include "ipu-prv.h" |
| 13 | |
| 14 | #define DMFC_RD_CHAN 0x0000 |
| 15 | #define DMFC_WR_CHAN 0x0004 |
| 16 | #define DMFC_WR_CHAN_DEF 0x0008 |
| 17 | #define DMFC_DP_CHAN 0x000c |
| 18 | #define DMFC_DP_CHAN_DEF 0x0010 |
| 19 | #define DMFC_GENERAL1 0x0014 |
| 20 | #define DMFC_GENERAL2 0x0018 |
| 21 | #define DMFC_IC_CTRL 0x001c |
Philipp Zabel | 4734866 | 2014-04-14 23:53:18 +0200 | [diff] [blame] | 22 | #define DMFC_WR_CHAN_ALT 0x0020 |
| 23 | #define DMFC_WR_CHAN_DEF_ALT 0x0024 |
| 24 | #define DMFC_DP_CHAN_ALT 0x0028 |
| 25 | #define DMFC_DP_CHAN_DEF_ALT 0x002c |
| 26 | #define DMFC_GENERAL1_ALT 0x0030 |
| 27 | #define DMFC_STAT 0x0034 |
Sascha Hauer | aecfbdb | 2012-09-21 10:07:49 +0200 | [diff] [blame] | 28 | |
| 29 | #define DMFC_WR_CHAN_1_28 0 |
| 30 | #define DMFC_WR_CHAN_2_41 8 |
| 31 | #define DMFC_WR_CHAN_1C_42 16 |
| 32 | #define DMFC_WR_CHAN_2C_43 24 |
| 33 | |
| 34 | #define DMFC_DP_CHAN_5B_23 0 |
| 35 | #define DMFC_DP_CHAN_5F_27 8 |
| 36 | #define DMFC_DP_CHAN_6B_24 16 |
| 37 | #define DMFC_DP_CHAN_6F_29 24 |
| 38 | |
Sascha Hauer | aecfbdb | 2012-09-21 10:07:49 +0200 | [diff] [blame] | 39 | struct dmfc_channel_data { |
| 40 | int ipu_channel; |
| 41 | unsigned long channel_reg; |
| 42 | unsigned long shift; |
| 43 | unsigned eot_shift; |
| 44 | unsigned max_fifo_lines; |
| 45 | }; |
| 46 | |
| 47 | static const struct dmfc_channel_data dmfcdata[] = { |
| 48 | { |
Philipp Zabel | 134b87b | 2013-06-21 10:57:21 +0200 | [diff] [blame] | 49 | .ipu_channel = IPUV3_CHANNEL_MEM_BG_SYNC, |
Sascha Hauer | aecfbdb | 2012-09-21 10:07:49 +0200 | [diff] [blame] | 50 | .channel_reg = DMFC_DP_CHAN, |
| 51 | .shift = DMFC_DP_CHAN_5B_23, |
| 52 | .eot_shift = 20, |
| 53 | .max_fifo_lines = 3, |
| 54 | }, { |
| 55 | .ipu_channel = 24, |
| 56 | .channel_reg = DMFC_DP_CHAN, |
| 57 | .shift = DMFC_DP_CHAN_6B_24, |
| 58 | .eot_shift = 22, |
| 59 | .max_fifo_lines = 1, |
| 60 | }, { |
Philipp Zabel | 134b87b | 2013-06-21 10:57:21 +0200 | [diff] [blame] | 61 | .ipu_channel = IPUV3_CHANNEL_MEM_FG_SYNC, |
Sascha Hauer | aecfbdb | 2012-09-21 10:07:49 +0200 | [diff] [blame] | 62 | .channel_reg = DMFC_DP_CHAN, |
| 63 | .shift = DMFC_DP_CHAN_5F_27, |
| 64 | .eot_shift = 21, |
| 65 | .max_fifo_lines = 2, |
| 66 | }, { |
Philipp Zabel | 134b87b | 2013-06-21 10:57:21 +0200 | [diff] [blame] | 67 | .ipu_channel = IPUV3_CHANNEL_MEM_DC_SYNC, |
Sascha Hauer | aecfbdb | 2012-09-21 10:07:49 +0200 | [diff] [blame] | 68 | .channel_reg = DMFC_WR_CHAN, |
| 69 | .shift = DMFC_WR_CHAN_1_28, |
| 70 | .eot_shift = 16, |
| 71 | .max_fifo_lines = 2, |
| 72 | }, { |
| 73 | .ipu_channel = 29, |
| 74 | .channel_reg = DMFC_DP_CHAN, |
| 75 | .shift = DMFC_DP_CHAN_6F_29, |
| 76 | .eot_shift = 23, |
| 77 | .max_fifo_lines = 1, |
| 78 | }, |
| 79 | }; |
| 80 | |
| 81 | #define DMFC_NUM_CHANNELS ARRAY_SIZE(dmfcdata) |
| 82 | |
| 83 | struct ipu_dmfc_priv; |
| 84 | |
| 85 | struct dmfc_channel { |
| 86 | unsigned slots; |
Sascha Hauer | aecfbdb | 2012-09-21 10:07:49 +0200 | [diff] [blame] | 87 | struct ipu_soc *ipu; |
| 88 | struct ipu_dmfc_priv *priv; |
| 89 | const struct dmfc_channel_data *data; |
| 90 | }; |
| 91 | |
| 92 | struct ipu_dmfc_priv { |
| 93 | struct ipu_soc *ipu; |
| 94 | struct device *dev; |
| 95 | struct dmfc_channel channels[DMFC_NUM_CHANNELS]; |
| 96 | struct mutex mutex; |
Sascha Hauer | aecfbdb | 2012-09-21 10:07:49 +0200 | [diff] [blame] | 97 | void __iomem *base; |
| 98 | int use_count; |
| 99 | }; |
| 100 | |
| 101 | int ipu_dmfc_enable_channel(struct dmfc_channel *dmfc) |
| 102 | { |
| 103 | struct ipu_dmfc_priv *priv = dmfc->priv; |
| 104 | mutex_lock(&priv->mutex); |
| 105 | |
| 106 | if (!priv->use_count) |
| 107 | ipu_module_enable(priv->ipu, IPU_CONF_DMFC_EN); |
| 108 | |
| 109 | priv->use_count++; |
| 110 | |
| 111 | mutex_unlock(&priv->mutex); |
| 112 | |
| 113 | return 0; |
| 114 | } |
| 115 | EXPORT_SYMBOL_GPL(ipu_dmfc_enable_channel); |
| 116 | |
| 117 | void ipu_dmfc_disable_channel(struct dmfc_channel *dmfc) |
| 118 | { |
| 119 | struct ipu_dmfc_priv *priv = dmfc->priv; |
| 120 | |
| 121 | mutex_lock(&priv->mutex); |
| 122 | |
| 123 | priv->use_count--; |
| 124 | |
Liu Ying | 448ae8e | 2016-08-26 15:30:41 +0800 | [diff] [blame] | 125 | if (!priv->use_count) |
Sascha Hauer | aecfbdb | 2012-09-21 10:07:49 +0200 | [diff] [blame] | 126 | ipu_module_disable(priv->ipu, IPU_CONF_DMFC_EN); |
| 127 | |
| 128 | if (priv->use_count < 0) |
| 129 | priv->use_count = 0; |
| 130 | |
| 131 | mutex_unlock(&priv->mutex); |
| 132 | } |
| 133 | EXPORT_SYMBOL_GPL(ipu_dmfc_disable_channel); |
| 134 | |
Liu Ying | 27630c2 | 2016-03-14 16:10:10 +0800 | [diff] [blame] | 135 | void ipu_dmfc_config_wait4eot(struct dmfc_channel *dmfc, int width) |
Sascha Hauer | aecfbdb | 2012-09-21 10:07:49 +0200 | [diff] [blame] | 136 | { |
| 137 | struct ipu_dmfc_priv *priv = dmfc->priv; |
| 138 | u32 dmfc_gen1; |
| 139 | |
Liu Ying | 32c26a5 | 2016-03-14 16:10:08 +0800 | [diff] [blame] | 140 | mutex_lock(&priv->mutex); |
| 141 | |
Sascha Hauer | aecfbdb | 2012-09-21 10:07:49 +0200 | [diff] [blame] | 142 | dmfc_gen1 = readl(priv->base + DMFC_GENERAL1); |
| 143 | |
| 144 | if ((dmfc->slots * 64 * 4) / width > dmfc->data->max_fifo_lines) |
| 145 | dmfc_gen1 |= 1 << dmfc->data->eot_shift; |
| 146 | else |
| 147 | dmfc_gen1 &= ~(1 << dmfc->data->eot_shift); |
| 148 | |
| 149 | writel(dmfc_gen1, priv->base + DMFC_GENERAL1); |
| 150 | |
Liu Ying | 32c26a5 | 2016-03-14 16:10:08 +0800 | [diff] [blame] | 151 | mutex_unlock(&priv->mutex); |
Sascha Hauer | aecfbdb | 2012-09-21 10:07:49 +0200 | [diff] [blame] | 152 | } |
Liu Ying | 27630c2 | 2016-03-14 16:10:10 +0800 | [diff] [blame] | 153 | EXPORT_SYMBOL_GPL(ipu_dmfc_config_wait4eot); |
Sascha Hauer | aecfbdb | 2012-09-21 10:07:49 +0200 | [diff] [blame] | 154 | |
| 155 | struct dmfc_channel *ipu_dmfc_get(struct ipu_soc *ipu, int ipu_channel) |
| 156 | { |
| 157 | struct ipu_dmfc_priv *priv = ipu->dmfc_priv; |
| 158 | int i; |
| 159 | |
| 160 | for (i = 0; i < DMFC_NUM_CHANNELS; i++) |
| 161 | if (dmfcdata[i].ipu_channel == ipu_channel) |
| 162 | return &priv->channels[i]; |
| 163 | return ERR_PTR(-ENODEV); |
| 164 | } |
| 165 | EXPORT_SYMBOL_GPL(ipu_dmfc_get); |
| 166 | |
| 167 | void ipu_dmfc_put(struct dmfc_channel *dmfc) |
| 168 | { |
Sascha Hauer | aecfbdb | 2012-09-21 10:07:49 +0200 | [diff] [blame] | 169 | } |
| 170 | EXPORT_SYMBOL_GPL(ipu_dmfc_put); |
| 171 | |
| 172 | int ipu_dmfc_init(struct ipu_soc *ipu, struct device *dev, unsigned long base, |
| 173 | struct clk *ipu_clk) |
| 174 | { |
| 175 | struct ipu_dmfc_priv *priv; |
| 176 | int i; |
| 177 | |
| 178 | priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); |
| 179 | if (!priv) |
| 180 | return -ENOMEM; |
| 181 | |
| 182 | priv->base = devm_ioremap(dev, base, PAGE_SIZE); |
| 183 | if (!priv->base) |
| 184 | return -ENOMEM; |
| 185 | |
| 186 | priv->dev = dev; |
| 187 | priv->ipu = ipu; |
| 188 | mutex_init(&priv->mutex); |
| 189 | |
| 190 | ipu->dmfc_priv = priv; |
| 191 | |
| 192 | for (i = 0; i < DMFC_NUM_CHANNELS; i++) { |
| 193 | priv->channels[i].priv = priv; |
| 194 | priv->channels[i].ipu = ipu; |
| 195 | priv->channels[i].data = &dmfcdata[i]; |
Liu Ying | d7868cb | 2016-07-08 17:40:54 +0800 | [diff] [blame] | 196 | |
| 197 | if (dmfcdata[i].ipu_channel == IPUV3_CHANNEL_MEM_BG_SYNC || |
| 198 | dmfcdata[i].ipu_channel == IPUV3_CHANNEL_MEM_FG_SYNC || |
| 199 | dmfcdata[i].ipu_channel == IPUV3_CHANNEL_MEM_DC_SYNC) |
| 200 | priv->channels[i].slots = 2; |
Sascha Hauer | aecfbdb | 2012-09-21 10:07:49 +0200 | [diff] [blame] | 201 | } |
| 202 | |
Liu Ying | d7868cb | 2016-07-08 17:40:54 +0800 | [diff] [blame] | 203 | writel(0x00000050, priv->base + DMFC_WR_CHAN); |
| 204 | writel(0x00005654, priv->base + DMFC_DP_CHAN); |
Sascha Hauer | aecfbdb | 2012-09-21 10:07:49 +0200 | [diff] [blame] | 205 | writel(0x202020f6, priv->base + DMFC_WR_CHAN_DEF); |
| 206 | writel(0x2020f6f6, priv->base + DMFC_DP_CHAN_DEF); |
| 207 | writel(0x00000003, priv->base + DMFC_GENERAL1); |
| 208 | |
| 209 | return 0; |
| 210 | } |
| 211 | |
| 212 | void ipu_dmfc_exit(struct ipu_soc *ipu) |
| 213 | { |
| 214 | } |