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422 lines
10 KiB
422 lines
10 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Copyright (c) 2017 Pengutronix, Oleksij Rempel <[email protected]> |
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*/ |
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#include <linux/clk.h> |
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#include <linux/err.h> |
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#include <linux/interrupt.h> |
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#include <linux/kernel.h> |
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#include <linux/mfd/syscon.h> |
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#include <linux/module.h> |
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#include <linux/of_address.h> |
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#include <linux/of_device.h> |
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#include <linux/platform_device.h> |
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#include <linux/regmap.h> |
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#include <linux/remoteproc.h> |
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#define IMX7D_SRC_SCR 0x0C |
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#define IMX7D_ENABLE_M4 BIT(3) |
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#define IMX7D_SW_M4P_RST BIT(2) |
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#define IMX7D_SW_M4C_RST BIT(1) |
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#define IMX7D_SW_M4C_NON_SCLR_RST BIT(0) |
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#define IMX7D_M4_RST_MASK (IMX7D_ENABLE_M4 | IMX7D_SW_M4P_RST \ |
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| IMX7D_SW_M4C_RST \ |
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| IMX7D_SW_M4C_NON_SCLR_RST) |
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#define IMX7D_M4_START (IMX7D_ENABLE_M4 | IMX7D_SW_M4P_RST \ |
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| IMX7D_SW_M4C_RST) |
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#define IMX7D_M4_STOP IMX7D_SW_M4C_NON_SCLR_RST |
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/* Address: 0x020D8000 */ |
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#define IMX6SX_SRC_SCR 0x00 |
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#define IMX6SX_ENABLE_M4 BIT(22) |
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#define IMX6SX_SW_M4P_RST BIT(12) |
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#define IMX6SX_SW_M4C_NON_SCLR_RST BIT(4) |
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#define IMX6SX_SW_M4C_RST BIT(3) |
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#define IMX6SX_M4_START (IMX6SX_ENABLE_M4 | IMX6SX_SW_M4P_RST \ |
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| IMX6SX_SW_M4C_RST) |
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#define IMX6SX_M4_STOP IMX6SX_SW_M4C_NON_SCLR_RST |
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#define IMX6SX_M4_RST_MASK (IMX6SX_ENABLE_M4 | IMX6SX_SW_M4P_RST \ |
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| IMX6SX_SW_M4C_NON_SCLR_RST \ |
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| IMX6SX_SW_M4C_RST) |
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#define IMX7D_RPROC_MEM_MAX 8 |
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/** |
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* struct imx_rproc_mem - slim internal memory structure |
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* @cpu_addr: MPU virtual address of the memory region |
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* @sys_addr: Bus address used to access the memory region |
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* @size: Size of the memory region |
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*/ |
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struct imx_rproc_mem { |
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void __iomem *cpu_addr; |
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phys_addr_t sys_addr; |
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size_t size; |
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}; |
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/* att flags */ |
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/* M4 own area. Can be mapped at probe */ |
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#define ATT_OWN BIT(1) |
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/* address translation table */ |
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struct imx_rproc_att { |
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u32 da; /* device address (From Cortex M4 view)*/ |
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u32 sa; /* system bus address */ |
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u32 size; /* size of reg range */ |
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int flags; |
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}; |
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struct imx_rproc_dcfg { |
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u32 src_reg; |
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u32 src_mask; |
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u32 src_start; |
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u32 src_stop; |
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const struct imx_rproc_att *att; |
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size_t att_size; |
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}; |
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struct imx_rproc { |
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struct device *dev; |
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struct regmap *regmap; |
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struct rproc *rproc; |
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const struct imx_rproc_dcfg *dcfg; |
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struct imx_rproc_mem mem[IMX7D_RPROC_MEM_MAX]; |
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struct clk *clk; |
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}; |
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static const struct imx_rproc_att imx_rproc_att_imx7d[] = { |
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/* dev addr , sys addr , size , flags */ |
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/* OCRAM_S (M4 Boot code) - alias */ |
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{ 0x00000000, 0x00180000, 0x00008000, 0 }, |
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/* OCRAM_S (Code) */ |
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{ 0x00180000, 0x00180000, 0x00008000, ATT_OWN }, |
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/* OCRAM (Code) - alias */ |
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{ 0x00900000, 0x00900000, 0x00020000, 0 }, |
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/* OCRAM_EPDC (Code) - alias */ |
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{ 0x00920000, 0x00920000, 0x00020000, 0 }, |
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/* OCRAM_PXP (Code) - alias */ |
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{ 0x00940000, 0x00940000, 0x00008000, 0 }, |
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/* TCML (Code) */ |
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{ 0x1FFF8000, 0x007F8000, 0x00008000, ATT_OWN }, |
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/* DDR (Code) - alias, first part of DDR (Data) */ |
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{ 0x10000000, 0x80000000, 0x0FFF0000, 0 }, |
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/* TCMU (Data) */ |
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{ 0x20000000, 0x00800000, 0x00008000, ATT_OWN }, |
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/* OCRAM (Data) */ |
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{ 0x20200000, 0x00900000, 0x00020000, 0 }, |
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/* OCRAM_EPDC (Data) */ |
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{ 0x20220000, 0x00920000, 0x00020000, 0 }, |
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/* OCRAM_PXP (Data) */ |
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{ 0x20240000, 0x00940000, 0x00008000, 0 }, |
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/* DDR (Data) */ |
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{ 0x80000000, 0x80000000, 0x60000000, 0 }, |
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}; |
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static const struct imx_rproc_att imx_rproc_att_imx6sx[] = { |
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/* dev addr , sys addr , size , flags */ |
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/* TCML (M4 Boot Code) - alias */ |
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{ 0x00000000, 0x007F8000, 0x00008000, 0 }, |
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/* OCRAM_S (Code) */ |
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{ 0x00180000, 0x008F8000, 0x00004000, 0 }, |
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/* OCRAM_S (Code) - alias */ |
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{ 0x00180000, 0x008FC000, 0x00004000, 0 }, |
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/* TCML (Code) */ |
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{ 0x1FFF8000, 0x007F8000, 0x00008000, ATT_OWN }, |
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/* DDR (Code) - alias, first part of DDR (Data) */ |
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{ 0x10000000, 0x80000000, 0x0FFF8000, 0 }, |
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/* TCMU (Data) */ |
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{ 0x20000000, 0x00800000, 0x00008000, ATT_OWN }, |
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/* OCRAM_S (Data) - alias? */ |
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{ 0x208F8000, 0x008F8000, 0x00004000, 0 }, |
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/* DDR (Data) */ |
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{ 0x80000000, 0x80000000, 0x60000000, 0 }, |
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}; |
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static const struct imx_rproc_dcfg imx_rproc_cfg_imx7d = { |
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.src_reg = IMX7D_SRC_SCR, |
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.src_mask = IMX7D_M4_RST_MASK, |
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.src_start = IMX7D_M4_START, |
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.src_stop = IMX7D_M4_STOP, |
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.att = imx_rproc_att_imx7d, |
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.att_size = ARRAY_SIZE(imx_rproc_att_imx7d), |
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}; |
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static const struct imx_rproc_dcfg imx_rproc_cfg_imx6sx = { |
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.src_reg = IMX6SX_SRC_SCR, |
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.src_mask = IMX6SX_M4_RST_MASK, |
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.src_start = IMX6SX_M4_START, |
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.src_stop = IMX6SX_M4_STOP, |
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.att = imx_rproc_att_imx6sx, |
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.att_size = ARRAY_SIZE(imx_rproc_att_imx6sx), |
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}; |
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static int imx_rproc_start(struct rproc *rproc) |
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{ |
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struct imx_rproc *priv = rproc->priv; |
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const struct imx_rproc_dcfg *dcfg = priv->dcfg; |
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struct device *dev = priv->dev; |
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int ret; |
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ret = regmap_update_bits(priv->regmap, dcfg->src_reg, |
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dcfg->src_mask, dcfg->src_start); |
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if (ret) |
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dev_err(dev, "Failed to enable M4!\n"); |
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return ret; |
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} |
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static int imx_rproc_stop(struct rproc *rproc) |
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{ |
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struct imx_rproc *priv = rproc->priv; |
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const struct imx_rproc_dcfg *dcfg = priv->dcfg; |
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struct device *dev = priv->dev; |
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int ret; |
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ret = regmap_update_bits(priv->regmap, dcfg->src_reg, |
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dcfg->src_mask, dcfg->src_stop); |
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if (ret) |
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dev_err(dev, "Failed to stop M4!\n"); |
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return ret; |
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} |
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static int imx_rproc_da_to_sys(struct imx_rproc *priv, u64 da, |
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size_t len, u64 *sys) |
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{ |
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const struct imx_rproc_dcfg *dcfg = priv->dcfg; |
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int i; |
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/* parse address translation table */ |
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for (i = 0; i < dcfg->att_size; i++) { |
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const struct imx_rproc_att *att = &dcfg->att[i]; |
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if (da >= att->da && da + len < att->da + att->size) { |
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unsigned int offset = da - att->da; |
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*sys = att->sa + offset; |
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return 0; |
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} |
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} |
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dev_warn(priv->dev, "Translation failed: da = 0x%llx len = 0x%zx\n", |
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da, len); |
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return -ENOENT; |
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} |
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static void *imx_rproc_da_to_va(struct rproc *rproc, u64 da, size_t len) |
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{ |
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struct imx_rproc *priv = rproc->priv; |
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void *va = NULL; |
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u64 sys; |
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int i; |
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if (len == 0) |
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return NULL; |
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/* |
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* On device side we have many aliases, so we need to convert device |
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* address (M4) to system bus address first. |
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*/ |
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if (imx_rproc_da_to_sys(priv, da, len, &sys)) |
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return NULL; |
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for (i = 0; i < IMX7D_RPROC_MEM_MAX; i++) { |
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if (sys >= priv->mem[i].sys_addr && sys + len < |
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priv->mem[i].sys_addr + priv->mem[i].size) { |
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unsigned int offset = sys - priv->mem[i].sys_addr; |
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/* __force to make sparse happy with type conversion */ |
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va = (__force void *)(priv->mem[i].cpu_addr + offset); |
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break; |
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} |
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} |
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dev_dbg(&rproc->dev, "da = 0x%llx len = 0x%zx va = 0x%p\n", |
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da, len, va); |
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return va; |
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} |
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static const struct rproc_ops imx_rproc_ops = { |
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.start = imx_rproc_start, |
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.stop = imx_rproc_stop, |
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.da_to_va = imx_rproc_da_to_va, |
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}; |
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static int imx_rproc_addr_init(struct imx_rproc *priv, |
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struct platform_device *pdev) |
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{ |
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const struct imx_rproc_dcfg *dcfg = priv->dcfg; |
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struct device *dev = &pdev->dev; |
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struct device_node *np = dev->of_node; |
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int a, b = 0, err, nph; |
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/* remap required addresses */ |
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for (a = 0; a < dcfg->att_size; a++) { |
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const struct imx_rproc_att *att = &dcfg->att[a]; |
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if (!(att->flags & ATT_OWN)) |
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continue; |
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if (b >= IMX7D_RPROC_MEM_MAX) |
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break; |
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priv->mem[b].cpu_addr = devm_ioremap(&pdev->dev, |
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att->sa, att->size); |
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if (!priv->mem[b].cpu_addr) { |
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dev_err(dev, "devm_ioremap_resource failed\n"); |
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return -ENOMEM; |
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} |
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priv->mem[b].sys_addr = att->sa; |
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priv->mem[b].size = att->size; |
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b++; |
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} |
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/* memory-region is optional property */ |
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nph = of_count_phandle_with_args(np, "memory-region", NULL); |
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if (nph <= 0) |
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return 0; |
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/* remap optional addresses */ |
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for (a = 0; a < nph; a++) { |
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struct device_node *node; |
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struct resource res; |
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node = of_parse_phandle(np, "memory-region", a); |
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err = of_address_to_resource(node, 0, &res); |
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if (err) { |
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dev_err(dev, "unable to resolve memory region\n"); |
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return err; |
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} |
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if (b >= IMX7D_RPROC_MEM_MAX) |
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break; |
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priv->mem[b].cpu_addr = devm_ioremap_resource(&pdev->dev, &res); |
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if (IS_ERR(priv->mem[b].cpu_addr)) { |
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dev_err(dev, "devm_ioremap_resource failed\n"); |
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err = PTR_ERR(priv->mem[b].cpu_addr); |
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return err; |
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} |
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priv->mem[b].sys_addr = res.start; |
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priv->mem[b].size = resource_size(&res); |
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b++; |
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} |
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return 0; |
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} |
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static int imx_rproc_probe(struct platform_device *pdev) |
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{ |
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struct device *dev = &pdev->dev; |
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struct device_node *np = dev->of_node; |
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struct imx_rproc *priv; |
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struct rproc *rproc; |
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struct regmap_config config = { .name = "imx-rproc" }; |
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const struct imx_rproc_dcfg *dcfg; |
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struct regmap *regmap; |
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int ret; |
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regmap = syscon_regmap_lookup_by_phandle(np, "syscon"); |
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if (IS_ERR(regmap)) { |
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dev_err(dev, "failed to find syscon\n"); |
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return PTR_ERR(regmap); |
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} |
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regmap_attach_dev(dev, regmap, &config); |
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/* set some other name then imx */ |
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rproc = rproc_alloc(dev, "imx-rproc", &imx_rproc_ops, |
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NULL, sizeof(*priv)); |
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if (!rproc) |
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return -ENOMEM; |
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dcfg = of_device_get_match_data(dev); |
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if (!dcfg) { |
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ret = -EINVAL; |
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goto err_put_rproc; |
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} |
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priv = rproc->priv; |
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priv->rproc = rproc; |
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priv->regmap = regmap; |
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priv->dcfg = dcfg; |
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priv->dev = dev; |
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dev_set_drvdata(dev, rproc); |
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ret = imx_rproc_addr_init(priv, pdev); |
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if (ret) { |
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dev_err(dev, "failed on imx_rproc_addr_init\n"); |
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goto err_put_rproc; |
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} |
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priv->clk = devm_clk_get(dev, NULL); |
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if (IS_ERR(priv->clk)) { |
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dev_err(dev, "Failed to get clock\n"); |
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ret = PTR_ERR(priv->clk); |
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goto err_put_rproc; |
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} |
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/* |
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* clk for M4 block including memory. Should be |
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* enabled before .start for FW transfer. |
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*/ |
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ret = clk_prepare_enable(priv->clk); |
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if (ret) { |
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dev_err(&rproc->dev, "Failed to enable clock\n"); |
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goto err_put_rproc; |
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} |
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ret = rproc_add(rproc); |
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if (ret) { |
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dev_err(dev, "rproc_add failed\n"); |
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goto err_put_clk; |
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} |
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return 0; |
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err_put_clk: |
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clk_disable_unprepare(priv->clk); |
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err_put_rproc: |
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rproc_free(rproc); |
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return ret; |
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} |
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static int imx_rproc_remove(struct platform_device *pdev) |
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{ |
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struct rproc *rproc = platform_get_drvdata(pdev); |
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struct imx_rproc *priv = rproc->priv; |
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clk_disable_unprepare(priv->clk); |
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rproc_del(rproc); |
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rproc_free(rproc); |
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return 0; |
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} |
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static const struct of_device_id imx_rproc_of_match[] = { |
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{ .compatible = "fsl,imx7d-cm4", .data = &imx_rproc_cfg_imx7d }, |
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{ .compatible = "fsl,imx6sx-cm4", .data = &imx_rproc_cfg_imx6sx }, |
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{}, |
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}; |
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MODULE_DEVICE_TABLE(of, imx_rproc_of_match); |
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static struct platform_driver imx_rproc_driver = { |
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.probe = imx_rproc_probe, |
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.remove = imx_rproc_remove, |
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.driver = { |
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.name = "imx-rproc", |
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.of_match_table = imx_rproc_of_match, |
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}, |
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}; |
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module_platform_driver(imx_rproc_driver); |
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MODULE_LICENSE("GPL v2"); |
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MODULE_DESCRIPTION("IMX6SX/7D remote processor control driver"); |
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MODULE_AUTHOR("Oleksij Rempel <[email protected]>");
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