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path: root/drivers/soc/mediatek/mtk-scpsys.c
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Diffstat (limited to 'drivers/soc/mediatek/mtk-scpsys.c')
-rw-r--r--drivers/soc/mediatek/mtk-scpsys.c167
1 files changed, 67 insertions, 100 deletions
diff --git a/drivers/soc/mediatek/mtk-scpsys.c b/drivers/soc/mediatek/mtk-scpsys.c
index d762a46d434f..128e3dd3186d 100644
--- a/drivers/soc/mediatek/mtk-scpsys.c
+++ b/drivers/soc/mediatek/mtk-scpsys.c
@@ -13,6 +13,7 @@
#include <linux/clk.h>
#include <linux/init.h>
#include <linux/io.h>
+#include <linux/iopoll.h>
#include <linux/mfd/syscon.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
@@ -27,6 +28,13 @@
#include <dt-bindings/power/mt7623a-power.h>
#include <dt-bindings/power/mt8173-power.h>
+#define MTK_POLL_DELAY_US 10
+#define MTK_POLL_TIMEOUT (jiffies_to_usecs(HZ))
+
+#define MTK_SCPD_ACTIVE_WAKEUP BIT(0)
+#define MTK_SCPD_FWAIT_SRAM BIT(1)
+#define MTK_SCPD_CAPS(_scpd, _x) ((_scpd)->data->caps & (_x))
+
#define SPM_VDE_PWR_CON 0x0210
#define SPM_MFG_PWR_CON 0x0214
#define SPM_VEN_PWR_CON 0x0230
@@ -116,7 +124,7 @@ struct scp_domain_data {
u32 sram_pdn_ack_bits;
u32 bus_prot_mask;
enum clk_id clk_id[MAX_CLKS];
- bool active_wakeup;
+ u8 caps;
};
struct scp;
@@ -184,12 +192,10 @@ static int scpsys_power_on(struct generic_pm_domain *genpd)
{
struct scp_domain *scpd = container_of(genpd, struct scp_domain, genpd);
struct scp *scp = scpd->scp;
- unsigned long timeout;
- bool expired;
void __iomem *ctl_addr = scp->base + scpd->data->ctl_offs;
- u32 sram_pdn_ack = scpd->data->sram_pdn_ack_bits;
+ u32 pdn_ack = scpd->data->sram_pdn_ack_bits;
u32 val;
- int ret;
+ int ret, tmp;
int i;
if (scpd->supply) {
@@ -215,23 +221,10 @@ static int scpsys_power_on(struct generic_pm_domain *genpd)
writel(val, ctl_addr);
/* wait until PWR_ACK = 1 */
- timeout = jiffies + HZ;
- expired = false;
- while (1) {
- ret = scpsys_domain_is_on(scpd);
- if (ret > 0)
- break;
-
- if (expired) {
- ret = -ETIMEDOUT;
- goto err_pwr_ack;
- }
-
- cpu_relax();
-
- if (time_after(jiffies, timeout))
- expired = true;
- }
+ ret = readx_poll_timeout(scpsys_domain_is_on, scpd, tmp, tmp > 0,
+ MTK_POLL_DELAY_US, MTK_POLL_TIMEOUT);
+ if (ret < 0)
+ goto err_pwr_ack;
val &= ~PWR_CLK_DIS_BIT;
writel(val, ctl_addr);
@@ -245,20 +238,20 @@ static int scpsys_power_on(struct generic_pm_domain *genpd)
val &= ~scpd->data->sram_pdn_bits;
writel(val, ctl_addr);
- /* wait until SRAM_PDN_ACK all 0 */
- timeout = jiffies + HZ;
- expired = false;
- while (sram_pdn_ack && (readl(ctl_addr) & sram_pdn_ack)) {
+ /* Either wait until SRAM_PDN_ACK all 0 or have a force wait */
+ if (MTK_SCPD_CAPS(scpd, MTK_SCPD_FWAIT_SRAM)) {
+ /*
+ * Currently, MTK_SCPD_FWAIT_SRAM is necessary only for
+ * MT7622_POWER_DOMAIN_WB and thus just a trivial setup is
+ * applied here.
+ */
+ usleep_range(12000, 12100);
- if (expired) {
- ret = -ETIMEDOUT;
+ } else {
+ ret = readl_poll_timeout(ctl_addr, tmp, (tmp & pdn_ack) == 0,
+ MTK_POLL_DELAY_US, MTK_POLL_TIMEOUT);
+ if (ret < 0)
goto err_pwr_ack;
- }
-
- cpu_relax();
-
- if (time_after(jiffies, timeout))
- expired = true;
}
if (scpd->data->bus_prot_mask) {
@@ -289,12 +282,10 @@ static int scpsys_power_off(struct generic_pm_domain *genpd)
{
struct scp_domain *scpd = container_of(genpd, struct scp_domain, genpd);
struct scp *scp = scpd->scp;
- unsigned long timeout;
- bool expired;
void __iomem *ctl_addr = scp->base + scpd->data->ctl_offs;
u32 pdn_ack = scpd->data->sram_pdn_ack_bits;
u32 val;
- int ret;
+ int ret, tmp;
int i;
if (scpd->data->bus_prot_mask) {
@@ -310,19 +301,10 @@ static int scpsys_power_off(struct generic_pm_domain *genpd)
writel(val, ctl_addr);
/* wait until SRAM_PDN_ACK all 1 */
- timeout = jiffies + HZ;
- expired = false;
- while (pdn_ack && (readl(ctl_addr) & pdn_ack) != pdn_ack) {
- if (expired) {
- ret = -ETIMEDOUT;
- goto out;
- }
-
- cpu_relax();
-
- if (time_after(jiffies, timeout))
- expired = true;
- }
+ ret = readl_poll_timeout(ctl_addr, tmp, (tmp & pdn_ack) == pdn_ack,
+ MTK_POLL_DELAY_US, MTK_POLL_TIMEOUT);
+ if (ret < 0)
+ goto out;
val |= PWR_ISO_BIT;
writel(val, ctl_addr);
@@ -340,23 +322,10 @@ static int scpsys_power_off(struct generic_pm_domain *genpd)
writel(val, ctl_addr);
/* wait until PWR_ACK = 0 */
- timeout = jiffies + HZ;
- expired = false;
- while (1) {
- ret = scpsys_domain_is_on(scpd);
- if (ret == 0)
- break;
-
- if (expired) {
- ret = -ETIMEDOUT;
- goto out;
- }
-
- cpu_relax();
-
- if (time_after(jiffies, timeout))
- expired = true;
- }
+ ret = readx_poll_timeout(scpsys_domain_is_on, scpd, tmp, tmp == 0,
+ MTK_POLL_DELAY_US, MTK_POLL_TIMEOUT);
+ if (ret < 0)
+ goto out;
for (i = 0; i < MAX_CLKS && scpd->clk[i]; i++)
clk_disable_unprepare(scpd->clk[i]);
@@ -469,7 +438,7 @@ static struct scp *init_scp(struct platform_device *pdev,
genpd->name = data->name;
genpd->power_off = scpsys_power_off;
genpd->power_on = scpsys_power_on;
- if (scpd->data->active_wakeup)
+ if (MTK_SCPD_CAPS(scpd, MTK_SCPD_ACTIVE_WAKEUP))
genpd->flags |= GENPD_FLAG_ACTIVE_WAKEUP;
}
@@ -522,7 +491,7 @@ static const struct scp_domain_data scp_domain_data_mt2701[] = {
.bus_prot_mask = MT2701_TOP_AXI_PROT_EN_CONN_M |
MT2701_TOP_AXI_PROT_EN_CONN_S,
.clk_id = {CLK_NONE},
- .active_wakeup = true,
+ .caps = MTK_SCPD_ACTIVE_WAKEUP,
},
[MT2701_POWER_DOMAIN_DISP] = {
.name = "disp",
@@ -531,7 +500,7 @@ static const struct scp_domain_data scp_domain_data_mt2701[] = {
.sram_pdn_bits = GENMASK(11, 8),
.clk_id = {CLK_MM},
.bus_prot_mask = MT2701_TOP_AXI_PROT_EN_MM_M0,
- .active_wakeup = true,
+ .caps = MTK_SCPD_ACTIVE_WAKEUP,
},
[MT2701_POWER_DOMAIN_MFG] = {
.name = "mfg",
@@ -540,7 +509,7 @@ static const struct scp_domain_data scp_domain_data_mt2701[] = {
.sram_pdn_bits = GENMASK(11, 8),
.sram_pdn_ack_bits = GENMASK(12, 12),
.clk_id = {CLK_MFG},
- .active_wakeup = true,
+ .caps = MTK_SCPD_ACTIVE_WAKEUP,
},
[MT2701_POWER_DOMAIN_VDEC] = {
.name = "vdec",
@@ -549,7 +518,7 @@ static const struct scp_domain_data scp_domain_data_mt2701[] = {
.sram_pdn_bits = GENMASK(11, 8),
.sram_pdn_ack_bits = GENMASK(12, 12),
.clk_id = {CLK_MM},
- .active_wakeup = true,
+ .caps = MTK_SCPD_ACTIVE_WAKEUP,
},
[MT2701_POWER_DOMAIN_ISP] = {
.name = "isp",
@@ -558,7 +527,7 @@ static const struct scp_domain_data scp_domain_data_mt2701[] = {
.sram_pdn_bits = GENMASK(11, 8),
.sram_pdn_ack_bits = GENMASK(13, 12),
.clk_id = {CLK_MM},
- .active_wakeup = true,
+ .caps = MTK_SCPD_ACTIVE_WAKEUP,
},
[MT2701_POWER_DOMAIN_BDP] = {
.name = "bdp",
@@ -566,7 +535,7 @@ static const struct scp_domain_data scp_domain_data_mt2701[] = {
.ctl_offs = SPM_BDP_PWR_CON,
.sram_pdn_bits = GENMASK(11, 8),
.clk_id = {CLK_NONE},
- .active_wakeup = true,
+ .caps = MTK_SCPD_ACTIVE_WAKEUP,
},
[MT2701_POWER_DOMAIN_ETH] = {
.name = "eth",
@@ -575,7 +544,7 @@ static const struct scp_domain_data scp_domain_data_mt2701[] = {
.sram_pdn_bits = GENMASK(11, 8),
.sram_pdn_ack_bits = GENMASK(15, 12),
.clk_id = {CLK_ETHIF},
- .active_wakeup = true,
+ .caps = MTK_SCPD_ACTIVE_WAKEUP,
},
[MT2701_POWER_DOMAIN_HIF] = {
.name = "hif",
@@ -584,14 +553,14 @@ static const struct scp_domain_data scp_domain_data_mt2701[] = {
.sram_pdn_bits = GENMASK(11, 8),
.sram_pdn_ack_bits = GENMASK(15, 12),
.clk_id = {CLK_ETHIF},
- .active_wakeup = true,
+ .caps = MTK_SCPD_ACTIVE_WAKEUP,
},
[MT2701_POWER_DOMAIN_IFR_MSC] = {
.name = "ifr_msc",
.sta_mask = PWR_STATUS_IFR_MSC,
.ctl_offs = SPM_IFR_MSC_PWR_CON,
.clk_id = {CLK_NONE},
- .active_wakeup = true,
+ .caps = MTK_SCPD_ACTIVE_WAKEUP,
},
};
@@ -606,7 +575,7 @@ static const struct scp_domain_data scp_domain_data_mt2712[] = {
.sram_pdn_bits = GENMASK(8, 8),
.sram_pdn_ack_bits = GENMASK(12, 12),
.clk_id = {CLK_MM},
- .active_wakeup = true,
+ .caps = MTK_SCPD_ACTIVE_WAKEUP,
},
[MT2712_POWER_DOMAIN_VDEC] = {
.name = "vdec",
@@ -615,7 +584,7 @@ static const struct scp_domain_data scp_domain_data_mt2712[] = {
.sram_pdn_bits = GENMASK(8, 8),
.sram_pdn_ack_bits = GENMASK(12, 12),
.clk_id = {CLK_MM, CLK_VDEC},
- .active_wakeup = true,
+ .caps = MTK_SCPD_ACTIVE_WAKEUP,
},
[MT2712_POWER_DOMAIN_VENC] = {
.name = "venc",
@@ -624,7 +593,7 @@ static const struct scp_domain_data scp_domain_data_mt2712[] = {
.sram_pdn_bits = GENMASK(11, 8),
.sram_pdn_ack_bits = GENMASK(15, 12),
.clk_id = {CLK_MM, CLK_VENC, CLK_JPGDEC},
- .active_wakeup = true,
+ .caps = MTK_SCPD_ACTIVE_WAKEUP,
},
[MT2712_POWER_DOMAIN_ISP] = {
.name = "isp",
@@ -633,7 +602,7 @@ static const struct scp_domain_data scp_domain_data_mt2712[] = {
.sram_pdn_bits = GENMASK(11, 8),
.sram_pdn_ack_bits = GENMASK(13, 12),
.clk_id = {CLK_MM},
- .active_wakeup = true,
+ .caps = MTK_SCPD_ACTIVE_WAKEUP,
},
[MT2712_POWER_DOMAIN_AUDIO] = {
.name = "audio",
@@ -642,7 +611,7 @@ static const struct scp_domain_data scp_domain_data_mt2712[] = {
.sram_pdn_bits = GENMASK(11, 8),
.sram_pdn_ack_bits = GENMASK(15, 12),
.clk_id = {CLK_AUDIO},
- .active_wakeup = true,
+ .caps = MTK_SCPD_ACTIVE_WAKEUP,
},
[MT2712_POWER_DOMAIN_USB] = {
.name = "usb",
@@ -651,7 +620,7 @@ static const struct scp_domain_data scp_domain_data_mt2712[] = {
.sram_pdn_bits = GENMASK(10, 8),
.sram_pdn_ack_bits = GENMASK(14, 12),
.clk_id = {CLK_NONE},
- .active_wakeup = true,
+ .caps = MTK_SCPD_ACTIVE_WAKEUP,
},
[MT2712_POWER_DOMAIN_USB2] = {
.name = "usb2",
@@ -660,7 +629,7 @@ static const struct scp_domain_data scp_domain_data_mt2712[] = {
.sram_pdn_bits = GENMASK(10, 8),
.sram_pdn_ack_bits = GENMASK(14, 12),
.clk_id = {CLK_NONE},
- .active_wakeup = true,
+ .caps = MTK_SCPD_ACTIVE_WAKEUP,
},
[MT2712_POWER_DOMAIN_MFG] = {
.name = "mfg",
@@ -670,7 +639,7 @@ static const struct scp_domain_data scp_domain_data_mt2712[] = {
.sram_pdn_ack_bits = GENMASK(16, 16),
.clk_id = {CLK_MFG},
.bus_prot_mask = BIT(14) | BIT(21) | BIT(23),
- .active_wakeup = true,
+ .caps = MTK_SCPD_ACTIVE_WAKEUP,
},
[MT2712_POWER_DOMAIN_MFG_SC1] = {
.name = "mfg_sc1",
@@ -679,7 +648,7 @@ static const struct scp_domain_data scp_domain_data_mt2712[] = {
.sram_pdn_bits = GENMASK(8, 8),
.sram_pdn_ack_bits = GENMASK(16, 16),
.clk_id = {CLK_NONE},
- .active_wakeup = true,
+ .caps = MTK_SCPD_ACTIVE_WAKEUP,
},
[MT2712_POWER_DOMAIN_MFG_SC2] = {
.name = "mfg_sc2",
@@ -688,7 +657,7 @@ static const struct scp_domain_data scp_domain_data_mt2712[] = {
.sram_pdn_bits = GENMASK(8, 8),
.sram_pdn_ack_bits = GENMASK(16, 16),
.clk_id = {CLK_NONE},
- .active_wakeup = true,
+ .caps = MTK_SCPD_ACTIVE_WAKEUP,
},
[MT2712_POWER_DOMAIN_MFG_SC3] = {
.name = "mfg_sc3",
@@ -697,7 +666,7 @@ static const struct scp_domain_data scp_domain_data_mt2712[] = {
.sram_pdn_bits = GENMASK(8, 8),
.sram_pdn_ack_bits = GENMASK(16, 16),
.clk_id = {CLK_NONE},
- .active_wakeup = true,
+ .caps = MTK_SCPD_ACTIVE_WAKEUP,
},
};
@@ -797,7 +766,7 @@ static const struct scp_domain_data scp_domain_data_mt7622[] = {
.sram_pdn_ack_bits = GENMASK(15, 12),
.clk_id = {CLK_NONE},
.bus_prot_mask = MT7622_TOP_AXI_PROT_EN_ETHSYS,
- .active_wakeup = true,
+ .caps = MTK_SCPD_ACTIVE_WAKEUP,
},
[MT7622_POWER_DOMAIN_HIF0] = {
.name = "hif0",
@@ -807,7 +776,7 @@ static const struct scp_domain_data scp_domain_data_mt7622[] = {
.sram_pdn_ack_bits = GENMASK(15, 12),
.clk_id = {CLK_HIFSEL},
.bus_prot_mask = MT7622_TOP_AXI_PROT_EN_HIF0,
- .active_wakeup = true,
+ .caps = MTK_SCPD_ACTIVE_WAKEUP,
},
[MT7622_POWER_DOMAIN_HIF1] = {
.name = "hif1",
@@ -817,7 +786,7 @@ static const struct scp_domain_data scp_domain_data_mt7622[] = {
.sram_pdn_ack_bits = GENMASK(15, 12),
.clk_id = {CLK_HIFSEL},
.bus_prot_mask = MT7622_TOP_AXI_PROT_EN_HIF1,
- .active_wakeup = true,
+ .caps = MTK_SCPD_ACTIVE_WAKEUP,
},
[MT7622_POWER_DOMAIN_WB] = {
.name = "wb",
@@ -827,7 +796,7 @@ static const struct scp_domain_data scp_domain_data_mt7622[] = {
.sram_pdn_ack_bits = 0,
.clk_id = {CLK_NONE},
.bus_prot_mask = MT7622_TOP_AXI_PROT_EN_WB,
- .active_wakeup = true,
+ .caps = MTK_SCPD_ACTIVE_WAKEUP | MTK_SCPD_FWAIT_SRAM,
},
};
@@ -843,7 +812,7 @@ static const struct scp_domain_data scp_domain_data_mt7623a[] = {
.bus_prot_mask = MT2701_TOP_AXI_PROT_EN_CONN_M |
MT2701_TOP_AXI_PROT_EN_CONN_S,
.clk_id = {CLK_NONE},
- .active_wakeup = true,
+ .caps = MTK_SCPD_ACTIVE_WAKEUP,
},
[MT7623A_POWER_DOMAIN_ETH] = {
.name = "eth",
@@ -852,7 +821,7 @@ static const struct scp_domain_data scp_domain_data_mt7623a[] = {
.sram_pdn_bits = GENMASK(11, 8),
.sram_pdn_ack_bits = GENMASK(15, 12),
.clk_id = {CLK_ETHIF},
- .active_wakeup = true,
+ .caps = MTK_SCPD_ACTIVE_WAKEUP,
},
[MT7623A_POWER_DOMAIN_HIF] = {
.name = "hif",
@@ -861,14 +830,14 @@ static const struct scp_domain_data scp_domain_data_mt7623a[] = {
.sram_pdn_bits = GENMASK(11, 8),
.sram_pdn_ack_bits = GENMASK(15, 12),
.clk_id = {CLK_ETHIF},
- .active_wakeup = true,
+ .caps = MTK_SCPD_ACTIVE_WAKEUP,
},
[MT7623A_POWER_DOMAIN_IFR_MSC] = {
.name = "ifr_msc",
.sta_mask = PWR_STATUS_IFR_MSC,
.ctl_offs = SPM_IFR_MSC_PWR_CON,
.clk_id = {CLK_NONE},
- .active_wakeup = true,
+ .caps = MTK_SCPD_ACTIVE_WAKEUP,
},
};
@@ -934,7 +903,7 @@ static const struct scp_domain_data scp_domain_data_mt8173[] = {
.sram_pdn_bits = GENMASK(11, 8),
.sram_pdn_ack_bits = GENMASK(15, 12),
.clk_id = {CLK_NONE},
- .active_wakeup = true,
+ .caps = MTK_SCPD_ACTIVE_WAKEUP,
},
[MT8173_POWER_DOMAIN_MFG_ASYNC] = {
.name = "mfg_async",
@@ -1067,15 +1036,13 @@ static const struct of_device_id of_scpsys_match_tbl[] = {
static int scpsys_probe(struct platform_device *pdev)
{
- const struct of_device_id *match;
const struct scp_subdomain *sd;
const struct scp_soc_data *soc;
struct scp *scp;
struct genpd_onecell_data *pd_data;
int i, ret;
- match = of_match_device(of_scpsys_match_tbl, &pdev->dev);
- soc = (const struct scp_soc_data *)match->data;
+ soc = of_device_get_match_data(&pdev->dev);
scp = init_scp(pdev, soc->domains, soc->num_domains, &soc->regs,
soc->bus_prot_reg_update);
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-16 23:34:41 +0300