Release 4.11 drivers/soc/mediatek/mtk-scpsys.c
/*
* Copyright (c) 2015 Pengutronix, Sascha Hauer <kernel@pengutronix.de>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/clk.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/mfd/syscon.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/pm_domain.h>
#include <linux/regulator/consumer.h>
#include <linux/soc/mediatek/infracfg.h>
#include <dt-bindings/power/mt2701-power.h>
#include <dt-bindings/power/mt8173-power.h>
#define SPM_VDE_PWR_CON 0x0210
#define SPM_MFG_PWR_CON 0x0214
#define SPM_VEN_PWR_CON 0x0230
#define SPM_ISP_PWR_CON 0x0238
#define SPM_DIS_PWR_CON 0x023c
#define SPM_CONN_PWR_CON 0x0280
#define SPM_VEN2_PWR_CON 0x0298
#define SPM_AUDIO_PWR_CON 0x029c
/* MT8173 */
#define SPM_BDP_PWR_CON 0x029c
/* MT2701 */
#define SPM_ETH_PWR_CON 0x02a0
#define SPM_HIF_PWR_CON 0x02a4
#define SPM_IFR_MSC_PWR_CON 0x02a8
#define SPM_MFG_2D_PWR_CON 0x02c0
#define SPM_MFG_ASYNC_PWR_CON 0x02c4
#define SPM_USB_PWR_CON 0x02cc
#define SPM_PWR_STATUS 0x060c
#define SPM_PWR_STATUS_2ND 0x0610
#define PWR_RST_B_BIT BIT(0)
#define PWR_ISO_BIT BIT(1)
#define PWR_ON_BIT BIT(2)
#define PWR_ON_2ND_BIT BIT(3)
#define PWR_CLK_DIS_BIT BIT(4)
#define PWR_STATUS_CONN BIT(1)
#define PWR_STATUS_DISP BIT(3)
#define PWR_STATUS_MFG BIT(4)
#define PWR_STATUS_ISP BIT(5)
#define PWR_STATUS_VDEC BIT(7)
#define PWR_STATUS_BDP BIT(14)
#define PWR_STATUS_ETH BIT(15)
#define PWR_STATUS_HIF BIT(16)
#define PWR_STATUS_IFR_MSC BIT(17)
#define PWR_STATUS_VENC_LT BIT(20)
#define PWR_STATUS_VENC BIT(21)
#define PWR_STATUS_MFG_2D BIT(22)
#define PWR_STATUS_MFG_ASYNC BIT(23)
#define PWR_STATUS_AUDIO BIT(24)
#define PWR_STATUS_USB BIT(25)
enum clk_id {
CLK_NONE,
CLK_MM,
CLK_MFG,
CLK_VENC,
CLK_VENC_LT,
CLK_ETHIF,
CLK_MAX,
};
static const char * const clk_names[] = {
NULL,
"mm",
"mfg",
"venc",
"venc_lt",
"ethif",
NULL,
};
#define MAX_CLKS 2
struct scp_domain_data {
const char *name;
u32 sta_mask;
int ctl_offs;
u32 sram_pdn_bits;
u32 sram_pdn_ack_bits;
u32 bus_prot_mask;
enum clk_id clk_id[MAX_CLKS];
bool active_wakeup;
};
struct scp;
struct scp_domain {
struct generic_pm_domain genpd;
struct scp *scp;
struct clk *clk[MAX_CLKS];
const struct scp_domain_data *data;
struct regulator *supply;
};
struct scp {
struct scp_domain *domains;
struct genpd_onecell_data pd_data;
struct device *dev;
void __iomem *base;
struct regmap *infracfg;
};
static int scpsys_domain_is_on(struct scp_domain *scpd)
{
struct scp *scp = scpd->scp;
u32 status = readl(scp->base + SPM_PWR_STATUS) & scpd->data->sta_mask;
u32 status2 = readl(scp->base + SPM_PWR_STATUS_2ND) &
scpd->data->sta_mask;
/*
* A domain is on when both status bits are set. If only one is set
* return an error. This happens while powering up a domain
*/
if (status && status2)
return true;
if (!status && !status2)
return false;
return -EINVAL;
}
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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 val;
int ret;
int i;
if (scpd->supply) {
ret = regulator_enable(scpd->supply);
if (ret)
return ret;
}
for (i = 0; i < MAX_CLKS && scpd->clk[i]; i++) {
ret = clk_prepare_enable(scpd->clk[i]);
if (ret) {
for (--i; i >= 0; i--)
clk_disable_unprepare(scpd->clk[i]);
goto err_clk;
}
}
val = readl(ctl_addr);
val |= PWR_ON_BIT;
writel(val, ctl_addr);
val |= PWR_ON_2ND_BIT;
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;
}
val &= ~PWR_CLK_DIS_BIT;
writel(val, ctl_addr);
val &= ~PWR_ISO_BIT;
writel(val, ctl_addr);
val |= PWR_RST_B_BIT;
writel(val, ctl_addr);
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)) {
if (expired) {
ret = -ETIMEDOUT;
goto err_pwr_ack;
}
cpu_relax();
if (time_after(jiffies, timeout))
expired = true;
}
if (scpd->data->bus_prot_mask) {
ret = mtk_infracfg_clear_bus_protection(scp->infracfg,
scpd->data->bus_prot_mask);
if (ret)
goto err_pwr_ack;
}
return 0;
err_pwr_ack:
for (i = MAX_CLKS - 1; i >= 0; i--) {
if (scpd->clk[i])
clk_disable_unprepare(scpd->clk[i]);
}
err_clk:
if (scpd->supply)
regulator_disable(scpd->supply);
dev_err(scp->dev, "Failed to power on domain %s\n", genpd->name);
return ret;
}
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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 i;
if (scpd->data->bus_prot_mask) {
ret = mtk_infracfg_set_bus_protection(scp->infracfg,
scpd->data->bus_prot_mask);
if (ret)
goto out;
}
val = readl(ctl_addr);
val |= scpd->data->sram_pdn_bits;
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;
}
val |= PWR_ISO_BIT;
writel(val, ctl_addr);
val &= ~PWR_RST_B_BIT;
writel(val, ctl_addr);
val |= PWR_CLK_DIS_BIT;
writel(val, ctl_addr);
val &= ~PWR_ON_BIT;
writel(val, ctl_addr);
val &= ~PWR_ON_2ND_BIT;
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;
}
for (i = 0; i < MAX_CLKS && scpd->clk[i]; i++)
clk_disable_unprepare(scpd->clk[i]);
if (scpd->supply)
regulator_disable(scpd->supply);
return 0;
out:
dev_err(scp->dev, "Failed to power off domain %s\n", genpd->name);
return ret;
}
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| Total | 370 | 100.00% | 5 | 100.00% |
static bool scpsys_active_wakeup(struct device *dev)
{
struct generic_pm_domain *genpd;
struct scp_domain *scpd;
genpd = pd_to_genpd(dev->pm_domain);
scpd = container_of(genpd, struct scp_domain, genpd);
return scpd->data->active_wakeup;
}
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static void init_clks(struct platform_device *pdev, struct clk **clk)
{
int i;
for (i = CLK_NONE + 1; i < CLK_MAX; i++)
clk[i] = devm_clk_get(&pdev->dev, clk_names[i]);
}
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static struct scp *init_scp(struct platform_device *pdev,
const struct scp_domain_data *scp_domain_data, int num)
{
struct genpd_onecell_data *pd_data;
struct resource *res;
int i, j;
struct scp *scp;
struct clk *clk[CLK_MAX];
scp = devm_kzalloc(&pdev->dev, sizeof(*scp), GFP_KERNEL);
if (!scp)
return ERR_PTR(-ENOMEM);
scp->dev = &pdev->dev;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
scp->base = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(scp->base))
return ERR_CAST(scp->base);
scp->domains = devm_kzalloc(&pdev->dev,
sizeof(*scp->domains) * num, GFP_KERNEL);
if (!scp->domains)
return ERR_PTR(-ENOMEM);
pd_data = &scp->pd_data;
pd_data->domains = devm_kzalloc(&pdev->dev,
sizeof(*pd_data->domains) * num, GFP_KERNEL);
if (!pd_data->domains)
return ERR_PTR(-ENOMEM);
scp->infracfg = syscon_regmap_lookup_by_phandle(pdev->dev.of_node,
"infracfg");
if (IS_ERR(scp->infracfg)) {
dev_err(&pdev->dev, "Cannot find infracfg controller: %ld\n",
PTR_ERR(scp->infracfg));
return ERR_CAST(scp->infracfg);
}
for (i = 0; i < num; i++) {
struct scp_domain *scpd = &scp->domains[i];
const struct scp_domain_data *data = &scp_domain_data[i];
scpd->supply = devm_regulator_get_optional(&pdev->dev, data->name);
if (IS_ERR(scpd->supply)) {
if (PTR_ERR(scpd->supply) == -ENODEV)
scpd->supply = NULL;
else
return ERR_CAST(scpd->supply);
}
}
pd_data->num_domains = num;
init_clks(pdev, clk);
for (i = 0; i < num; i++) {
struct scp_domain *scpd = &scp->domains[i];
struct generic_pm_domain *genpd = &scpd->genpd;
const struct scp_domain_data *data = &scp_domain_data[i];
pd_data->domains[i] = genpd;
scpd->scp = scp;
scpd->data = data;
for (j = 0; j < MAX_CLKS && data->clk_id[j]; j++) {
struct clk *c = clk[data->clk_id[j]];
if (IS_ERR(c)) {
dev_err(&pdev->dev, "%s: clk unavailable\n",
data->name);
return ERR_CAST(c);
}
scpd->clk[j] = c;
}
genpd->name = data->name;
genpd->power_off = scpsys_power_off;
genpd->power_on = scpsys_power_on;
genpd->dev_ops.active_wakeup = scpsys_active_wakeup;
}
return scp;
}
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| Total | 549 | 100.00% | 6 | 100.00% |
static void mtk_register_power_domains(struct platform_device *pdev,
struct scp *scp, int num)
{
struct genpd_onecell_data *pd_data;
int i, ret;
for (i = 0; i < num; i++) {
struct scp_domain *scpd = &scp->domains[i];
struct generic_pm_domain *genpd = &scpd->genpd;
/*
* Initially turn on all domains to make the domains usable
* with !CONFIG_PM and to get the hardware in sync with the
* software. The unused domains will be switched off during
* late_init time.
*/
genpd->power_on(genpd);
pm_genpd_init(genpd, NULL, false);
}
/*
* We are not allowed to fail here since there is no way to unregister
* a power domain. Once registered above we have to keep the domains
* valid.
*/
pd_data = &scp->pd_data;
ret = of_genpd_add_provider_onecell(pdev->dev.of_node, pd_data);
if (ret)
dev_err(&pdev->dev, "Failed to add OF provider: %d\n", ret);
}
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/*
* MT2701 power domain support
*/
static const struct scp_domain_data scp_domain_data_mt2701[] = {
[MT2701_POWER_DOMAIN_CONN] = {
.name = "conn",
.sta_mask = PWR_STATUS_CONN,
.ctl_offs = SPM_CONN_PWR_CON,
.bus_prot_mask = 0x0104,
.clk_id = {CLK_NONE},
.active_wakeup = true,
},
[MT2701_POWER_DOMAIN_DISP] = {
.name = "disp",
.sta_mask = PWR_STATUS_DISP,
.ctl_offs = SPM_DIS_PWR_CON,
.sram_pdn_bits = GENMASK(11, 8),
.clk_id = {CLK_MM},
.bus_prot_mask = 0x0002,
.active_wakeup = true,
},
[MT2701_POWER_DOMAIN_MFG] = {
.name = "mfg",
.sta_mask = PWR_STATUS_MFG,
.ctl_offs = SPM_MFG_PWR_CON,
.sram_pdn_bits = GENMASK(11, 8),
.sram_pdn_ack_bits = GENMASK(12, 12),
.clk_id = {CLK_MFG},
.active_wakeup = true,
},
[MT2701_POWER_DOMAIN_VDEC] = {
.name = "vdec",
.sta_mask = PWR_STATUS_VDEC,
.ctl_offs = SPM_VDE_PWR_CON,
.sram_pdn_bits = GENMASK(11, 8),
.sram_pdn_ack_bits = GENMASK(12, 12),
.clk_id = {CLK_MM},
.active_wakeup = true,
},
[MT2701_POWER_DOMAIN_ISP] = {
.name = "isp",
.sta_mask = PWR_STATUS_ISP,
.ctl_offs = SPM_ISP_PWR_CON,
.sram_pdn_bits = GENMASK(11, 8),
.sram_pdn_ack_bits = GENMASK(13, 12),
.clk_id = {CLK_MM},
.active_wakeup = true,
},
[MT2701_POWER_DOMAIN_BDP] = {
.name = "bdp",
.sta_mask = PWR_STATUS_BDP,
.ctl_offs = SPM_BDP_PWR_CON,
.sram_pdn_bits = GENMASK(11, 8),
.clk_id = {CLK_NONE},
.active_wakeup = true,
},
[MT2701_POWER_DOMAIN_ETH] = {
.name = "eth",
.sta_mask = PWR_STATUS_ETH,
.ctl_offs = SPM_ETH_PWR_CON,
.sram_pdn_bits = GENMASK(11, 8),
.sram_pdn_ack_bits = GENMASK(15, 12),
.clk_id = {CLK_ETHIF},
.active_wakeup = true,
},
[MT2701_POWER_DOMAIN_HIF] = {
.name = "hif",
.sta_mask = PWR_STATUS_HIF,
.ctl_offs = SPM_HIF_PWR_CON,
.sram_pdn_bits = GENMASK(11, 8),
.sram_pdn_ack_bits = GENMASK(15, 12),
.clk_id = {CLK_ETHIF},
.active_wakeup = true,
},
[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,
},
};
#define NUM_DOMAINS_MT2701 ARRAY_SIZE(scp_domain_data_mt2701)
static int __init scpsys_probe_mt2701(struct platform_device *pdev)
{
struct scp *scp;
scp = init_scp(pdev, scp_domain_data_mt2701, NUM_DOMAINS_MT2701);
if (IS_ERR(scp))
return PTR_ERR(scp);
mtk_register_power_domains(pdev, scp, NUM_DOMAINS_MT2701);
return 0;
}
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/*
* MT8173 power domain support
*/
static const struct scp_domain_data scp_domain_data_mt8173[] = {
[MT8173_POWER_DOMAIN_VDEC] = {
.name = "vdec",
.sta_mask = PWR_STATUS_VDEC,
.ctl_offs = SPM_VDE_PWR_CON,
.sram_pdn_bits = GENMASK(11, 8),
.sram_pdn_ack_bits = GENMASK(12, 12),
.clk_id = {CLK_MM},
},
[MT8173_POWER_DOMAIN_VENC] = {
.name = "venc",
.sta_mask = PWR_STATUS_VENC,
.ctl_offs = SPM_VEN_PWR_CON,
.sram_pdn_bits = GENMASK(11, 8),
.sram_pdn_ack_bits = GENMASK(15, 12),
.clk_id = {CLK_MM, CLK_VENC},
},
[MT8173_POWER_DOMAIN_ISP] = {
.name = "isp",
.sta_mask = PWR_STATUS_ISP,
.ctl_offs = SPM_ISP_PWR_CON,
.sram_pdn_bits = GENMASK(11, 8),
.sram_pdn_ack_bits = GENMASK(13, 12),
.clk_id = {CLK_MM},
},
[MT8173_POWER_DOMAIN_MM] = {
.name = "mm",
.sta_mask = PWR_STATUS_DISP,
.ctl_offs = SPM_DIS_PWR_CON,
.sram_pdn_bits = GENMASK(11, 8),
.sram_pdn_ack_bits = GENMASK(12, 12),
.clk_id = {CLK_MM},
.bus_prot_mask = MT8173_TOP_AXI_PROT_EN_MM_M0 |
MT8173_TOP_AXI_PROT_EN_MM_M1,
},
[MT8173_POWER_DOMAIN_VENC_LT] = {
.name = "venc_lt",
.sta_mask = PWR_STATUS_VENC_LT,
.ctl_offs = SPM_VEN2_PWR_CON,
.sram_pdn_bits = GENMASK(11, 8),
.sram_pdn_ack_bits = GENMASK(15, 12),
.clk_id = {CLK_MM, CLK_VENC_LT},
},
[MT8173_POWER_DOMAIN_AUDIO] = {
.name = "audio",
.sta_mask = PWR_STATUS_AUDIO,
.ctl_offs = SPM_AUDIO_PWR_CON,
.sram_pdn_bits = GENMASK(11, 8),
.sram_pdn_ack_bits = GENMASK(15, 12),
.clk_id = {CLK_NONE},
},
[MT8173_POWER_DOMAIN_USB] = {
.name = "usb",
.sta_mask = PWR_STATUS_USB,
.ctl_offs = SPM_USB_PWR_CON,
.sram_pdn_bits = GENMASK(11, 8),
.sram_pdn_ack_bits = GENMASK(15, 12),
.clk_id = {CLK_NONE},
.active_wakeup = true,
},
[MT8173_POWER_DOMAIN_MFG_ASYNC] = {
.name = "mfg_async",
.sta_mask = PWR_STATUS_MFG_ASYNC,
.ctl_offs = SPM_MFG_ASYNC_PWR_CON,
.sram_pdn_bits = GENMASK(11, 8),
.sram_pdn_ack_bits = 0,
.clk_id = {CLK_MFG},
},
[MT8173_POWER_DOMAIN_MFG_2D] = {
.name = "mfg_2d",
.sta_mask = PWR_STATUS_MFG_2D,
.ctl_offs = SPM_MFG_2D_PWR_CON,
.sram_pdn_bits = GENMASK(11, 8),
.sram_pdn_ack_bits = GENMASK(13, 12),
.clk_id = {CLK_NONE},
},
[MT8173_POWER_DOMAIN_MFG] = {
.name = "mfg",
.sta_mask = PWR_STATUS_MFG,
.ctl_offs = SPM_MFG_PWR_CON,
.sram_pdn_bits = GENMASK(13, 8),
.sram_pdn_ack_bits = GENMASK(21, 16),
.clk_id = {CLK_NONE},
.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,
},
};
#define NUM_DOMAINS_MT8173 ARRAY_SIZE(scp_domain_data_mt8173)
static int __init scpsys_probe_mt8173(struct platform_device *pdev)
{
struct scp *scp;
struct genpd_onecell_data *pd_data;
int ret;
scp = init_scp(pdev, scp_domain_data_mt8173, NUM_DOMAINS_MT8173);
if (IS_ERR(scp))
return PTR_ERR(scp);
mtk_register_power_domains(pdev, scp, NUM_DOMAINS_MT8173);
pd_data = &scp->pd_data;
ret = pm_genpd_add_subdomain(pd_data->domains[MT8173_POWER_DOMAIN_MFG_ASYNC],
pd_data->domains[MT8173_POWER_DOMAIN_MFG_2D]);
if (ret && IS_ENABLED(CONFIG_PM))
dev_err(&pdev->dev, "Failed to add subdomain: %d\n", ret);
ret = pm_genpd_add_subdomain(pd_data->domains[MT8173_POWER_DOMAIN_MFG_2D],
pd_data->domains[MT8173_POWER_DOMAIN_MFG]);
if (ret && IS_ENABLED(CONFIG_PM))
dev_err(&pdev->dev, "Failed to add subdomain: %d\n", ret);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Sascha Hauer | 103 | 69.59% | 1 | 50.00% |
| James Liao | 45 | 30.41% | 1 | 50.00% |
| Total | 148 | 100.00% | 2 | 100.00% |
/*
* scpsys driver init
*/
static const struct of_device_id of_scpsys_match_tbl[] = {
{
.compatible = "mediatek,mt2701-scpsys",
.data = scpsys_probe_mt2701,
}, {
.compatible = "mediatek,mt8173-scpsys",
.data = scpsys_probe_mt8173,
}, {
/* sentinel */
}
};
static int scpsys_probe(struct platform_device *pdev)
{
int (*probe)(struct platform_device *);
const struct of_device_id *of_id;
of_id = of_match_node(of_scpsys_match_tbl, pdev->dev.of_node);
if (!of_id || !of_id->data)
return -EINVAL;
probe = of_id->data;
return probe(pdev);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| James Liao | 67 | 100.00% | 1 | 100.00% |
| Total | 67 | 100.00% | 1 | 100.00% |
static struct platform_driver scpsys_drv = {
.probe = scpsys_probe,
.driver = {
.name = "mtk-scpsys",
.suppress_bind_attrs = true,
.owner = THIS_MODULE,
.of_match_table = of_match_ptr(of_scpsys_match_tbl),
},
};
builtin_platform_driver(scpsys_drv);
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| James Liao | 1733 | 52.10% | 2 | 28.57% |
| Sascha Hauer | 853 | 25.65% | 2 | 28.57% |
| Shunli Wang | 699 | 21.02% | 1 | 14.29% |
| Matthias Brugger | 27 | 0.81% | 1 | 14.29% |
| Eddie Huang | 14 | 0.42% | 1 | 14.29% |
| Total | 3326 | 100.00% | 7 | 100.00% |
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