Re: [PATCH v13 05/11] soc: mediatek: Add multiple step bus protection control
From: Weiyi Lu <hidden>
Date: 2020-05-06 07:42:29
Also in:
linux-mediatek, lkml
On Fri, 2020-04-24 at 02:19 +0800, Enric Balletbo Serra wrote:
Hi Wiyi Lu, Thank you for your patch. Missatge de Weiyi Lu [off-list ref] del dia dv., 20 de març 2020 a les 8:33:quoted
Both MT8183 & MT6765 have more control steps of bus protection than previous project. And there add more bus protection registers reside at infracfg & smi-common. Extend function to support multiple step bus protection control with more customized arguments. And then use bp_table for bus protection of all compatibles, instead of mixing bus_prot_mask and bus_prot_reg_update. Signed-off-by: Weiyi Lu <redacted> --- drivers/soc/mediatek/mtk-scpsys.c | 206 ++++++++++++++++++++++++++------------ drivers/soc/mediatek/scpsys.h | 42 +++++++- 2 files changed, 182 insertions(+), 66 deletions(-)diff --git a/drivers/soc/mediatek/mtk-scpsys.c b/drivers/soc/mediatek/mtk-scpsys.c index e50a568..a4fb0b23 100644 --- a/drivers/soc/mediatek/mtk-scpsys.c +++ b/drivers/soc/mediatek/mtk-scpsys.c@@ -88,9 +88,9 @@ * @ctl_offs: The offset for main power control register. * @sram_pdn_bits: The mask for sram power control bits. * @sram_pdn_ack_bits: The mask for sram power control acked bits. - * @bus_prot_mask: The mask for single step bus protection. * @basic_clk_name: The basic clocks required by this power domain. * @caps: The flag for active wake-up action. + * @bp_table: The mask table for multiple step bus protection. */ struct scp_domain_data { const char *name;@@ -98,9 +98,9 @@ struct scp_domain_data { int ctl_offs; u32 sram_pdn_bits; u32 sram_pdn_ack_bits; - u32 bus_prot_mask; const char *basic_clk_name[MAX_CLKS]; u8 caps; + struct bus_prot bp_table[MAX_STEPS]; }; struct scp;@@ -124,8 +124,8 @@ struct scp { struct device *dev; void __iomem *base; struct regmap *infracfg; + struct regmap *smi_common; struct scp_ctrl_reg ctrl_reg; - bool bus_prot_reg_update; }; struct scp_subdomain {@@ -139,7 +139,6 @@ struct scp_soc_data { const struct scp_subdomain *subdomains; int num_subdomains; const struct scp_ctrl_reg regs; - bool bus_prot_reg_update; }; static int scpsys_domain_is_on(struct scp_domain *scpd)@@ -249,53 +248,102 @@ static int scpsys_sram_disable(struct scp_domain *scpd, void __iomem *ctl_addr) MTK_POLL_DELAY_US, MTK_POLL_TIMEOUT); } +static int set_bus_protection(struct regmap *map, struct bus_prot *bp) +{ + u32 val; + u32 set_ofs = bp->set_ofs; + u32 en_ofs = bp->en_ofs; + u32 sta_ofs = bp->sta_ofs; + u32 mask = bp->mask;Remove unnecessary local variables (set_ofs, en_ofs, sta_ofs and mask), and use their bp-> form directly.
OK, I'll fix it.
quoted
+ + if (set_ofs) + regmap_write(map, set_ofs, mask); + else + regmap_update_bits(map, en_ofs, mask, mask); + + return regmap_read_poll_timeout(map, sta_ofs, + val, (val & mask) == mask, + MTK_POLL_DELAY_US, MTK_POLL_TIMEOUT); +} + +static int clear_bus_protection(struct regmap *map, struct bus_prot *bp) +{ + u32 val; + u32 clr_ofs = bp->clr_ofs; + u32 en_ofs = bp->en_ofs; + u32 sta_ofs = bp->sta_ofs; + u32 mask = bp->mask; + bool ignore_ack = bp->ignore_clr_ack;Remove unnecessary local variables (clr_ofs, en_ofs, sta_ofs, mask and ignore_ack), and use their bp-> form directly.
OK, I'll fix it.
quoted
+ + if (clr_ofs) + regmap_write(map, clr_ofs, mask); + else + regmap_update_bits(map, en_ofs, mask, 0); + + if (ignore_ack) + return 0; + + return regmap_read_poll_timeout(map, sta_ofs, + val, !(val & mask), + MTK_POLL_DELAY_US, MTK_POLL_TIMEOUT); +} + static int scpsys_bus_protect_enable(struct scp_domain *scpd) { struct scp *scp = scpd->scp; + const struct bus_prot *bp_table = scpd->data->bp_table; struct regmap *infracfg = scp->infracfg; - u32 mask = scpd->data->bus_prot_mask; - bool reg_update = scp->bus_prot_reg_update; - u32 val; - int ret;No need to remove ret if you're going to add anyway later.
Got it.
quoted
+ struct regmap *smi_common = scp->smi_common; + int i; - if (!mask) - return 0; + for (i = 0; i < MAX_STEPS; i++) { + struct regmap *map = NULL;Declare this on top of the function and no need to initialize to NUlL
Got it.
quoted
+ int ret; + struct bus_prot bp = bp_table[i];Unneeded local variable ...
Actually I followed Nicolas's suggestion in [1] But, it's okay to me to change it back. [1] https://patchwork.kernel.org/patch/11304709/
quoted
- if (reg_update) - regmap_update_bits(infracfg, INFRA_TOPAXI_PROTECTEN, mask, - mask); - else - regmap_write(infracfg, INFRA_TOPAXI_PROTECTEN_SET, mask); + if (bp.type == IFR_TYPE)bp_table[i].type?
Got it.
quoted
+ map = infracfg; + else if (bp.type == SMI_TYPE)ditto
Got it.
quoted
+ map = smi_common; + else + break;So if the type is invalid you break the loop, this is different to what you are doing below with the scpsys_bus_protect_protect_disable() function where you are "ignoring" instead of beaking the loop. I am wondering why? Looks to me that, or you break and print an error because something was really wrong? or you ignore in both cases?
The bp_table inside the scp_domain_data_mt8183 is static variable with maximum MAX_STEPS member count. So, for those power domains with less bus protection steps, invalid type will be used.
quoted
- ret = regmap_read_poll_timeout(infracfg, INFRA_TOPAXI_PROTECTSTA1, - val, (val & mask) == mask, - MTK_POLL_DELAY_US, MTK_POLL_TIMEOUT); + ret = set_bus_protection(map, &bp); - return ret; + if (ret) + return ret; + } + + return 0; } static int scpsys_bus_protect_disable(struct scp_domain *scpd) { struct scp *scp = scpd->scp; + const struct bus_prot *bp_table = scpd->data->bp_table; struct regmap *infracfg = scp->infracfg; - u32 mask = scpd->data->bus_prot_mask; - bool reg_update = scp->bus_prot_reg_update; - u32 val; - int ret; + struct regmap *smi_common = scp->smi_common; + int i; - if (!mask) - return 0; + for (i = MAX_STEPS - 1; i >= 0; i--) { + struct regmap *map = NULL; + int ret; + struct bus_prot bp = bp_table[i];The same comments done for scpsys_bus_protect_disable apply here.
Got it.
quoted
- if (reg_update) - regmap_update_bits(infracfg, INFRA_TOPAXI_PROTECTEN, mask, 0); - else - regmap_write(infracfg, INFRA_TOPAXI_PROTECTEN_CLR, mask); + if (bp.type == IFR_TYPE) + map = infracfg; + else if (bp.type == SMI_TYPE) + map = smi_common; + else + continue; - ret = regmap_read_poll_timeout(infracfg, INFRA_TOPAXI_PROTECTSTA1, - val, !(val & mask), - MTK_POLL_DELAY_US, MTK_POLL_TIMEOUT); + ret = clear_bus_protection(map, &bp); - return ret; + if (ret) + return ret; + } + + return 0; } static int scpsys_power_on(struct generic_pm_domain *genpd)@@ -430,8 +478,7 @@ static int init_basic_clks(struct platform_device *pdev, struct clk **clk, static struct scp *init_scp(struct platform_device *pdev, const struct scp_domain_data *scp_domain_data, int num, - const struct scp_ctrl_reg *scp_ctrl_reg, - bool bus_prot_reg_update) + const struct scp_ctrl_reg *scp_ctrl_reg) { struct genpd_onecell_data *pd_data; struct resource *res;@@ -445,8 +492,6 @@ static struct scp *init_scp(struct platform_device *pdev, scp->ctrl_reg.pwr_sta_offs = scp_ctrl_reg->pwr_sta_offs; scp->ctrl_reg.pwr_sta2nd_offs = scp_ctrl_reg->pwr_sta2nd_offs; - scp->bus_prot_reg_update = bus_prot_reg_update; - scp->dev = &pdev->dev; res = platform_get_resource(pdev, IORESOURCE_MEM, 0);@@ -474,6 +519,17 @@ static struct scp *init_scp(struct platform_device *pdev, return ERR_CAST(scp->infracfg); } + scp->smi_common = syscon_regmap_lookup_by_phandle(pdev->dev.of_node, + "smi_comm");Hmm, is this property documented? I couldn't find it.
Thanks, I'll add in the dt-binding document in PATCH 02.
quoted
+ + if (scp->smi_common == ERR_PTR(-ENODEV)) { + scp->smi_common = NULL; + } else if (IS_ERR(scp->smi_common)) { + dev_err(&pdev->dev, "Cannot find smi_common controller: %ld\n", + PTR_ERR(scp->smi_common)); + return ERR_CAST(scp->smi_common); + } + for (i = 0; i < num; i++) { struct scp_domain *scpd = &scp->domains[i]; const struct scp_domain_data *data = &scp_domain_data[i];@@ -556,8 +612,11 @@ static void mtk_register_power_domains(struct platform_device *pdev, .name = "conn", .sta_mask = PWR_STATUS_CONN, .ctl_offs = SPM_CONN_PWR_CON, - .bus_prot_mask = MT2701_TOP_AXI_PROT_EN_CONN_M | - MT2701_TOP_AXI_PROT_EN_CONN_S, + .bp_table = { + BUS_PROT(IFR_TYPE, 0, 0, 0x220, 0x228, + MT2701_TOP_AXI_PROT_EN_CONN_M | + MT2701_TOP_AXI_PROT_EN_CONN_S), + }, .caps = MTK_SCPD_ACTIVE_WAKEUP, }, [MT2701_POWER_DOMAIN_DISP] = {@@ -566,7 +625,10 @@ static void mtk_register_power_domains(struct platform_device *pdev, .ctl_offs = SPM_DIS_PWR_CON, .sram_pdn_bits = GENMASK(11, 8), .basic_clk_name = {"mm"}, - .bus_prot_mask = MT2701_TOP_AXI_PROT_EN_MM_M0, + .bp_table = { + BUS_PROT(IFR_TYPE, 0, 0, 0x220, 0x228, + MT2701_TOP_AXI_PROT_EN_MM_M0), + }, .caps = MTK_SCPD_ACTIVE_WAKEUP, }, [MT2701_POWER_DOMAIN_MFG] = {@@ -701,7 +763,10 @@ static void mtk_register_power_domains(struct platform_device *pdev, .sram_pdn_bits = GENMASK(8, 8), .sram_pdn_ack_bits = GENMASK(16, 16), .basic_clk_name = {"mfg"}, - .bus_prot_mask = BIT(14) | BIT(21) | BIT(23), + .bp_table = { + BUS_PROT(IFR_TYPE, 0x260, 0x264, 0x220, 0x228, + BIT(14) | BIT(21) | BIT(23)), + }, .caps = MTK_SCPD_ACTIVE_WAKEUP, }, [MT2712_POWER_DOMAIN_MFG_SC1] = {@@ -773,7 +838,10 @@ static void mtk_register_power_domains(struct platform_device *pdev, .sram_pdn_bits = GENMASK(8, 8), .sram_pdn_ack_bits = GENMASK(12, 12), .basic_clk_name = {"mm"}, - .bus_prot_mask = (BIT(1) | BIT(2)), + .bp_table = { + BUS_PROT(IFR_TYPE, 0, 0, 0x220, 0x228, + BIT(1) | BIT(2)), + }, }, [MT6797_POWER_DOMAIN_AUDIO] = { .name = "audio",@@ -820,7 +888,10 @@ static void mtk_register_power_domains(struct platform_device *pdev, .ctl_offs = SPM_ETHSYS_PWR_CON, .sram_pdn_bits = GENMASK(11, 8), .sram_pdn_ack_bits = GENMASK(15, 12), - .bus_prot_mask = MT7622_TOP_AXI_PROT_EN_ETHSYS, + .bp_table = { + BUS_PROT(IFR_TYPE, 0, 0, 0x220, 0x228, + MT7622_TOP_AXI_PROT_EN_ETHSYS), + }, .caps = MTK_SCPD_ACTIVE_WAKEUP, }, [MT7622_POWER_DOMAIN_HIF0] = {@@ -830,7 +901,10 @@ static void mtk_register_power_domains(struct platform_device *pdev, .sram_pdn_bits = GENMASK(11, 8), .sram_pdn_ack_bits = GENMASK(15, 12), .basic_clk_name = {"hif_sel"}, - .bus_prot_mask = MT7622_TOP_AXI_PROT_EN_HIF0, + .bp_table = { + BUS_PROT(IFR_TYPE, 0, 0, 0x220, 0x228, + MT7622_TOP_AXI_PROT_EN_HIF0), + }, .caps = MTK_SCPD_ACTIVE_WAKEUP, }, [MT7622_POWER_DOMAIN_HIF1] = {@@ -840,7 +914,10 @@ static void mtk_register_power_domains(struct platform_device *pdev, .sram_pdn_bits = GENMASK(11, 8), .sram_pdn_ack_bits = GENMASK(15, 12), .basic_clk_name = {"hif_sel"}, - .bus_prot_mask = MT7622_TOP_AXI_PROT_EN_HIF1, + .bp_table = { + BUS_PROT(IFR_TYPE, 0, 0, 0x220, 0x228, + MT7622_TOP_AXI_PROT_EN_HIF1), + }, .caps = MTK_SCPD_ACTIVE_WAKEUP, }, [MT7622_POWER_DOMAIN_WB] = {@@ -849,7 +926,10 @@ static void mtk_register_power_domains(struct platform_device *pdev, .ctl_offs = SPM_WB_PWR_CON, .sram_pdn_bits = 0, .sram_pdn_ack_bits = 0, - .bus_prot_mask = MT7622_TOP_AXI_PROT_EN_WB, + .bp_table = { + BUS_PROT(IFR_TYPE, 0, 0, 0x220, 0x228, + MT7622_TOP_AXI_PROT_EN_WB), + }, .caps = MTK_SCPD_ACTIVE_WAKEUP | MTK_SCPD_FWAIT_SRAM, }, };@@ -863,8 +943,11 @@ static void mtk_register_power_domains(struct platform_device *pdev, .name = "conn", .sta_mask = PWR_STATUS_CONN, .ctl_offs = SPM_CONN_PWR_CON, - .bus_prot_mask = MT2701_TOP_AXI_PROT_EN_CONN_M | - MT2701_TOP_AXI_PROT_EN_CONN_S, + .bp_table = { + BUS_PROT(IFR_TYPE, 0, 0, 0x220, 0x228, + MT2701_TOP_AXI_PROT_EN_CONN_M | + MT2701_TOP_AXI_PROT_EN_CONN_S), + }, .caps = MTK_SCPD_ACTIVE_WAKEUP, }, [MT7623A_POWER_DOMAIN_ETH] = {@@ -929,8 +1012,11 @@ static void mtk_register_power_domains(struct platform_device *pdev, .sram_pdn_bits = GENMASK(11, 8), .sram_pdn_ack_bits = GENMASK(12, 12), .basic_clk_name = {"mm"}, - .bus_prot_mask = MT8173_TOP_AXI_PROT_EN_MM_M0 | - MT8173_TOP_AXI_PROT_EN_MM_M1, + .bp_table = { + BUS_PROT(IFR_TYPE, 0, 0, 0x220, 0x228, + MT8173_TOP_AXI_PROT_EN_MM_M0 | + MT8173_TOP_AXI_PROT_EN_MM_M1), + }, }, [MT8173_POWER_DOMAIN_VENC_LT] = { .name = "venc_lt",@@ -976,10 +1062,13 @@ static void mtk_register_power_domains(struct platform_device *pdev, .ctl_offs = SPM_MFG_PWR_CON, .sram_pdn_bits = GENMASK(13, 8), .sram_pdn_ack_bits = GENMASK(21, 16), - .bus_prot_mask = MT8173_TOP_AXI_PROT_EN_MFG_S | - MT8173_TOP_AXI_PROT_EN_MFG_M0 | - MT8173_TOP_AXI_PROT_EN_MFG_M1 | - MT8173_TOP_AXI_PROT_EN_MFG_SNOOP_OUT, + .bp_table = { + BUS_PROT(IFR_TYPE, 0, 0, 0x220, 0x228, + MT8173_TOP_AXI_PROT_EN_MFG_S | + MT8173_TOP_AXI_PROT_EN_MFG_M0 | + MT8173_TOP_AXI_PROT_EN_MFG_M1 | + MT8173_TOP_AXI_PROT_EN_MFG_SNOOP_OUT), + }, }, };@@ -995,7 +1084,6 @@ static void mtk_register_power_domains(struct platform_device *pdev, .pwr_sta_offs = SPM_PWR_STATUS, .pwr_sta2nd_offs = SPM_PWR_STATUS_2ND }, - .bus_prot_reg_update = true, }; static const struct scp_soc_data mt2712_data = {@@ -1007,7 +1095,6 @@ static void mtk_register_power_domains(struct platform_device *pdev, .pwr_sta_offs = SPM_PWR_STATUS, .pwr_sta2nd_offs = SPM_PWR_STATUS_2ND }, - .bus_prot_reg_update = false, }; static const struct scp_soc_data mt6797_data = {@@ -1019,7 +1106,6 @@ static void mtk_register_power_domains(struct platform_device *pdev, .pwr_sta_offs = SPM_PWR_STATUS_MT6797, .pwr_sta2nd_offs = SPM_PWR_STATUS_2ND_MT6797 }, - .bus_prot_reg_update = true, }; static const struct scp_soc_data mt7622_data = {@@ -1029,7 +1115,6 @@ static void mtk_register_power_domains(struct platform_device *pdev, .pwr_sta_offs = SPM_PWR_STATUS, .pwr_sta2nd_offs = SPM_PWR_STATUS_2ND }, - .bus_prot_reg_update = true, }; static const struct scp_soc_data mt7623a_data = {@@ -1039,7 +1124,6 @@ static void mtk_register_power_domains(struct platform_device *pdev, .pwr_sta_offs = SPM_PWR_STATUS, .pwr_sta2nd_offs = SPM_PWR_STATUS_2ND }, - .bus_prot_reg_update = true, }; static const struct scp_soc_data mt8173_data = {@@ -1051,7 +1135,6 @@ static void mtk_register_power_domains(struct platform_device *pdev, .pwr_sta_offs = SPM_PWR_STATUS, .pwr_sta2nd_offs = SPM_PWR_STATUS_2ND }, - .bus_prot_reg_update = true, }; /*@@ -1092,8 +1175,7 @@ static int scpsys_probe(struct platform_device *pdev) soc = of_device_get_match_data(&pdev->dev); - scp = init_scp(pdev, soc->domains, soc->num_domains, &soc->regs, - soc->bus_prot_reg_update); + scp = init_scp(pdev, soc->domains, soc->num_domains, &soc->regs); if (IS_ERR(scp)) return PTR_ERR(scp);diff --git a/drivers/soc/mediatek/scpsys.h b/drivers/soc/mediatek/scpsys.h index ad2559b..45bc644 100644 --- a/drivers/soc/mediatek/scpsys.h +++ b/drivers/soc/mediatek/scpsys.h@@ -2,10 +2,28 @@ #ifndef __SOC_MEDIATEK_SCPSYS_H #define __SOC_MEDIATEK_SCPSYS_H -#define INFRA_TOPAXI_PROTECTEN 0x0220 -#define INFRA_TOPAXI_PROTECTSTA1 0x0228 -#define INFRA_TOPAXI_PROTECTEN_SET 0x0260 -#define INFRA_TOPAXI_PROTECTEN_CLR 0x0264 +#define MAX_STEPS 4 + +#define _BUS_PROT(_type, _set_ofs, _clr_ofs, \ + _en_ofs, _sta_ofs, _mask, _ignore_clr_ack) { \ + .type = _type, \ + .set_ofs = _set_ofs, \ + .clr_ofs = _clr_ofs, \ + .en_ofs = _en_ofs, \ + .sta_ofs = _sta_ofs, \ + .mask = _mask, \ + .ignore_clr_ack = _ignore_clr_ack, \ + } + +#define BUS_PROT(_type, _set_ofs, _clr_ofs, \ + _en_ofs, _sta_ofs, _mask) \ + _BUS_PROT(_type, _set_ofs, _clr_ofs, \ + _en_ofs, _sta_ofs, _mask, false) + +#define BUS_PROT_IGN(_type, _set_ofs, _clr_ofs, \ + _en_ofs, _sta_ofs, _mask) \ + _BUS_PROT(_type, _set_ofs, _clr_ofs, \ + _en_ofs, _sta_ofs, _mask, true) #define MT2701_TOP_AXI_PROT_EN_MM_M0 BIT(1) #define MT2701_TOP_AXI_PROT_EN_CONN_M BIT(2)@@ -25,4 +43,20 @@ #define MT8173_TOP_AXI_PROT_EN_MFG_M1 BIT(22) #define MT8173_TOP_AXI_PROT_EN_MFG_SNOOP_OUT BIT(23) +enum regmap_type { + INVALID_TYPE = 0,I didn't see any use of that type, is this an option?
Answered above.
quoted
+ IFR_TYPE, + SMI_TYPE, +}; + +struct bus_prot { + enum regmap_type type; + u32 set_ofs; + u32 clr_ofs; + u32 en_ofs; + u32 sta_ofs; + u32 mask; + bool ignore_clr_ack; +}; + #endif /* __SOC_MEDIATEK_SCPSYS_H */ -- 1.8.1.1.dirty _______________________________________________ Linux-mediatek mailing list Linux-mediatek@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-mediatek_______________________________________________ Linux-mediatek mailing list Linux-mediatek@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-mediatek
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