diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/remoteproc/imx_rproc.c | 58 | ||||
| -rw-r--r-- | drivers/remoteproc/imx_rproc.h | 2 |
2 files changed, 58 insertions, 2 deletions
diff --git a/drivers/remoteproc/imx_rproc.c b/drivers/remoteproc/imx_rproc.c index 4ee2646ce62a..8bb293b9f327 100644 --- a/drivers/remoteproc/imx_rproc.c +++ b/drivers/remoteproc/imx_rproc.c @@ -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 }, diff --git a/drivers/remoteproc/imx_rproc.h b/drivers/remoteproc/imx_rproc.h index 1c7e2127c758..79a1b8956d14 100644 --- a/drivers/remoteproc/imx_rproc.h +++ b/drivers/remoteproc/imx_rproc.h @@ -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; |