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remoteproc: imx_rproc: Switch iMX8MN/MP from SMCCC to MMIO

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The MX8M CM7 boot via SMC call is problematic, since not all versions
of ATF support this interface. Extend the MMIO support so it can boot
the CM7 on MX8MN/MP instead and discern the two alternatives using DT
compatible strings.

Signed-off-by: Marek Vasut <marex@denx.de>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Link: https://lore.kernel.org/r/20230724222418.163220-2-marex@denx.de
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
This commit is contained in:
Marek Vasut 2023-07-25 00:24:18 +02:00 committed by Mathieu Poirier
parent 05117bafbd
commit 49f80a7ab9
2 changed files with 58 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

58
drivers/remoteproc/imx_rproc.c
View File

@ -40,6 +40,12 @@
#define IMX7D_M4_STOP (IMX7D_ENABLE_M4 | IMX7D_SW_M4C_RST | \
IMX7D_SW_M4C_NON_SCLR_RST)
#define IMX8M_M7_STOP (IMX7D_ENABLE_M4 | IMX7D_SW_M4C_RST)
#define IMX8M_M7_POLL IMX7D_ENABLE_M4
#define IMX8M_GPR22 0x58
#define IMX8M_GPR22_CM7_CPUWAIT BIT(0)
/* Address: 0x020D8000 */
#define IMX6SX_SRC_SCR 0x00
#define IMX6SX_ENABLE_M4 BIT(22)
@ -91,6 +97,7 @@ static int imx_rproc_detach_pd(struct rproc *rproc);
struct imx_rproc {
struct device *dev;
struct regmap *regmap;
struct regmap *gpr;
struct rproc *rproc;
const struct imx_rproc_dcfg *dcfg;
struct imx_rproc_mem mem[IMX_RPROC_MEM_MAX];
@ -285,6 +292,18 @@ static const struct imx_rproc_att imx_rproc_att_imx6sx[] = {
{ 0x80000000, 0x80000000, 0x60000000, 0 },
};
static const struct imx_rproc_dcfg imx_rproc_cfg_imx8mn_mmio = {
.src_reg = IMX7D_SRC_SCR,
.src_mask = IMX7D_M4_RST_MASK,
.src_start = IMX7D_M4_START,
.src_stop = IMX8M_M7_STOP,
.gpr_reg = IMX8M_GPR22,
.gpr_wait = IMX8M_GPR22_CM7_CPUWAIT,
.att = imx_rproc_att_imx8mn,
.att_size = ARRAY_SIZE(imx_rproc_att_imx8mn),
.method = IMX_RPROC_MMIO,
};
static const struct imx_rproc_dcfg imx_rproc_cfg_imx8mn = {
.att = imx_rproc_att_imx8mn,
.att_size = ARRAY_SIZE(imx_rproc_att_imx8mn),
@ -365,8 +384,14 @@ static int imx_rproc_start(struct rproc *rproc)
switch (dcfg->method) {
case IMX_RPROC_MMIO:
ret = regmap_update_bits(priv->regmap, dcfg->src_reg, dcfg->src_mask,
dcfg->src_start);
if (priv->gpr) {
ret = regmap_clear_bits(priv->gpr, dcfg->gpr_reg,
dcfg->gpr_wait);
} else {
ret = regmap_update_bits(priv->regmap, dcfg->src_reg,
dcfg->src_mask,
dcfg->src_start);
}
break;
case IMX_RPROC_SMC:
arm_smccc_smc(IMX_SIP_RPROC, IMX_SIP_RPROC_START, 0, 0, 0, 0, 0, 0, &res);
@ -395,6 +420,16 @@ static int imx_rproc_stop(struct rproc *rproc)
switch (dcfg->method) {
case IMX_RPROC_MMIO:
if (priv->gpr) {
ret = regmap_set_bits(priv->gpr, dcfg->gpr_reg,
dcfg->gpr_wait);
if (ret) {
dev_err(priv->dev,
"Failed to quiescence M4 platform!\n");
return ret;
}
}
ret = regmap_update_bits(priv->regmap, dcfg->src_reg, dcfg->src_mask,
dcfg->src_stop);
break;
@ -992,6 +1027,10 @@ static int imx_rproc_detect_mode(struct imx_rproc *priv)
break;
}
priv->gpr = syscon_regmap_lookup_by_phandle(dev->of_node, "fsl,iomuxc-gpr");
if (IS_ERR(priv->gpr))
priv->gpr = NULL;
regmap = syscon_regmap_lookup_by_phandle(dev->of_node, "syscon");
if (IS_ERR(regmap)) {
dev_err(dev, "failed to find syscon\n");
@ -1001,6 +1040,19 @@ static int imx_rproc_detect_mode(struct imx_rproc *priv)
priv->regmap = regmap;
regmap_attach_dev(dev, regmap, &config);
if (priv->gpr) {
ret = regmap_read(priv->gpr, dcfg->gpr_reg, &val);
if (val & dcfg->gpr_wait) {
/*
* After cold boot, the CM indicates its in wait
* state, but not fully powered off. Power it off
* fully so firmware can be loaded into it.
*/
imx_rproc_stop(priv->rproc);
return 0;
}
}
ret = regmap_read(regmap, dcfg->src_reg, &val);
if (ret) {
dev_err(dev, "Failed to read src\n");
@ -1142,6 +1194,8 @@ static const struct of_device_id imx_rproc_of_match[] = {
{ .compatible = "fsl,imx8mm-cm4", .data = &imx_rproc_cfg_imx8mq },
{ .compatible = "fsl,imx8mn-cm7", .data = &imx_rproc_cfg_imx8mn },
{ .compatible = "fsl,imx8mp-cm7", .data = &imx_rproc_cfg_imx8mn },
{ .compatible = "fsl,imx8mn-cm7-mmio", .data = &imx_rproc_cfg_imx8mn_mmio },
{ .compatible = "fsl,imx8mp-cm7-mmio", .data = &imx_rproc_cfg_imx8mn_mmio },
{ .compatible = "fsl,imx8qxp-cm4", .data = &imx_rproc_cfg_imx8qxp },
{ .compatible = "fsl,imx8qm-cm4", .data = &imx_rproc_cfg_imx8qm },
{ .compatible = "fsl,imx8ulp-cm33", .data = &imx_rproc_cfg_imx8ulp },

2
drivers/remoteproc/imx_rproc.h
View File

@ -31,6 +31,8 @@ struct imx_rproc_dcfg {
u32 src_mask;
u32 src_start;
u32 src_stop;
u32 gpr_reg;
u32 gpr_wait;
const struct imx_rproc_att *att;
size_t att_size;
enum imx_rproc_method method;