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Diffstat (limited to 'drivers/soc/tegra/pmc.c')
-rw-r--r--drivers/soc/tegra/pmc.c304
1 files changed, 250 insertions, 54 deletions
diff --git a/drivers/soc/tegra/pmc.c b/drivers/soc/tegra/pmc.c
index 0453ff6839a7..ce62a47a6647 100644
--- a/drivers/soc/tegra/pmc.c
+++ b/drivers/soc/tegra/pmc.c
@@ -66,11 +66,10 @@
#define PMC_PWR_DET 0x48
-#define PMC_SCRATCH0 0x50
-#define PMC_SCRATCH0_MODE_RECOVERY BIT(31)
-#define PMC_SCRATCH0_MODE_BOOTLOADER BIT(30)
-#define PMC_SCRATCH0_MODE_RCM BIT(1)
-#define PMC_SCRATCH0_MODE_MASK (PMC_SCRATCH0_MODE_RECOVERY | \
+#define PMC_SCRATCH0_MODE_RECOVERY BIT(31)
+#define PMC_SCRATCH0_MODE_BOOTLOADER BIT(30)
+#define PMC_SCRATCH0_MODE_RCM BIT(1)
+#define PMC_SCRATCH0_MODE_MASK (PMC_SCRATCH0_MODE_RECOVERY | \
PMC_SCRATCH0_MODE_BOOTLOADER | \
PMC_SCRATCH0_MODE_RCM)
@@ -118,6 +117,10 @@
#define GPU_RG_CNTRL 0x2d4
+/* Tegra186 and later */
+#define WAKE_AOWAKE_CTRL 0x4f4
+#define WAKE_AOWAKE_CTRL_INTR_POLARITY BIT(0)
+
struct tegra_powergate {
struct generic_pm_domain genpd;
struct tegra_pmc *pmc;
@@ -134,6 +137,14 @@ struct tegra_io_pad_soc {
unsigned int voltage;
};
+struct tegra_pmc_regs {
+ unsigned int scratch0;
+ unsigned int dpd_req;
+ unsigned int dpd_status;
+ unsigned int dpd2_req;
+ unsigned int dpd2_status;
+};
+
struct tegra_pmc_soc {
unsigned int num_powergates;
const char *const *powergates;
@@ -145,6 +156,12 @@ struct tegra_pmc_soc {
const struct tegra_io_pad_soc *io_pads;
unsigned int num_io_pads;
+
+ const struct tegra_pmc_regs *regs;
+ void (*init)(struct tegra_pmc *pmc);
+ void (*setup_irq_polarity)(struct tegra_pmc *pmc,
+ struct device_node *np,
+ bool invert);
};
/**
@@ -173,6 +190,9 @@ struct tegra_pmc_soc {
struct tegra_pmc {
struct device *dev;
void __iomem *base;
+ void __iomem *wake;
+ void __iomem *aotag;
+ void __iomem *scratch;
struct clk *clk;
struct dentry *debugfs;
@@ -645,7 +665,7 @@ static int tegra_pmc_restart_notify(struct notifier_block *this,
const char *cmd = data;
u32 value;
- value = tegra_pmc_readl(PMC_SCRATCH0);
+ value = readl(pmc->scratch + pmc->soc->regs->scratch0);
value &= ~PMC_SCRATCH0_MODE_MASK;
if (cmd) {
@@ -659,7 +679,7 @@ static int tegra_pmc_restart_notify(struct notifier_block *this,
value |= PMC_SCRATCH0_MODE_RCM;
}
- tegra_pmc_writel(value, PMC_SCRATCH0);
+ writel(value, pmc->scratch + pmc->soc->regs->scratch0);
/* reset everything but PMC_SCRATCH0 and PMC_RST_STATUS */
value = tegra_pmc_readl(PMC_CNTRL);
@@ -954,25 +974,27 @@ static int tegra_io_pad_prepare(enum tegra_io_pad id, unsigned long *request,
*mask = BIT(pad->dpd % 32);
if (pad->dpd < 32) {
- *status = IO_DPD_STATUS;
- *request = IO_DPD_REQ;
+ *status = pmc->soc->regs->dpd_status;
+ *request = pmc->soc->regs->dpd_req;
} else {
- *status = IO_DPD2_STATUS;
- *request = IO_DPD2_REQ;
+ *status = pmc->soc->regs->dpd2_status;
+ *request = pmc->soc->regs->dpd2_req;
}
- rate = clk_get_rate(pmc->clk);
- if (!rate) {
- pr_err("failed to get clock rate\n");
- return -ENODEV;
- }
+ if (pmc->clk) {
+ rate = clk_get_rate(pmc->clk);
+ if (!rate) {
+ pr_err("failed to get clock rate\n");
+ return -ENODEV;
+ }
- tegra_pmc_writel(DPD_SAMPLE_ENABLE, DPD_SAMPLE);
+ tegra_pmc_writel(DPD_SAMPLE_ENABLE, DPD_SAMPLE);
- /* must be at least 200 ns, in APB (PCLK) clock cycles */
- value = DIV_ROUND_UP(1000000000, rate);
- value = DIV_ROUND_UP(200, value);
- tegra_pmc_writel(value, SEL_DPD_TIM);
+ /* must be at least 200 ns, in APB (PCLK) clock cycles */
+ value = DIV_ROUND_UP(1000000000, rate);
+ value = DIV_ROUND_UP(200, value);
+ tegra_pmc_writel(value, SEL_DPD_TIM);
+ }
return 0;
}
@@ -997,7 +1019,8 @@ static int tegra_io_pad_poll(unsigned long offset, u32 mask,
static void tegra_io_pad_unprepare(void)
{
- tegra_pmc_writel(DPD_SAMPLE_DISABLE, DPD_SAMPLE);
+ if (pmc->clk)
+ tegra_pmc_writel(DPD_SAMPLE_DISABLE, DPD_SAMPLE);
}
/**
@@ -1287,27 +1310,8 @@ static int tegra_pmc_parse_dt(struct tegra_pmc *pmc, struct device_node *np)
static void tegra_pmc_init(struct tegra_pmc *pmc)
{
- u32 value;
-
- /* Always enable CPU power request */
- value = tegra_pmc_readl(PMC_CNTRL);
- value |= PMC_CNTRL_CPU_PWRREQ_OE;
- tegra_pmc_writel(value, PMC_CNTRL);
-
- value = tegra_pmc_readl(PMC_CNTRL);
-
- if (pmc->sysclkreq_high)
- value &= ~PMC_CNTRL_SYSCLK_POLARITY;
- else
- value |= PMC_CNTRL_SYSCLK_POLARITY;
-
- /* configure the output polarity while the request is tristated */
- tegra_pmc_writel(value, PMC_CNTRL);
-
- /* now enable the request */
- value = tegra_pmc_readl(PMC_CNTRL);
- value |= PMC_CNTRL_SYSCLK_OE;
- tegra_pmc_writel(value, PMC_CNTRL);
+ if (pmc->soc->init)
+ pmc->soc->init(pmc);
}
static void tegra_pmc_init_tsense_reset(struct tegra_pmc *pmc)
@@ -1410,11 +1414,43 @@ static int tegra_pmc_probe(struct platform_device *pdev)
if (IS_ERR(base))
return PTR_ERR(base);
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "wake");
+ if (res) {
+ pmc->wake = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(pmc->wake))
+ return PTR_ERR(pmc->wake);
+ } else {
+ pmc->wake = base;
+ }
+
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "aotag");
+ if (res) {
+ pmc->aotag = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(pmc->aotag))
+ return PTR_ERR(pmc->aotag);
+ } else {
+ pmc->aotag = base;
+ }
+
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "scratch");
+ if (res) {
+ pmc->scratch = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(pmc->scratch))
+ return PTR_ERR(pmc->scratch);
+ } else {
+ pmc->scratch = base;
+ }
+
pmc->clk = devm_clk_get(&pdev->dev, "pclk");
if (IS_ERR(pmc->clk)) {
err = PTR_ERR(pmc->clk);
- dev_err(&pdev->dev, "failed to get pclk: %d\n", err);
- return err;
+
+ if (err != -ENOENT) {
+ dev_err(&pdev->dev, "failed to get pclk: %d\n", err);
+ return err;
+ }
+
+ pmc->clk = NULL;
}
pmc->dev = &pdev->dev;
@@ -1474,6 +1510,55 @@ static const char * const tegra20_powergates[] = {
[TEGRA_POWERGATE_MPE] = "mpe",
};
+static const struct tegra_pmc_regs tegra20_pmc_regs = {
+ .scratch0 = 0x50,
+ .dpd_req = 0x1b8,
+ .dpd_status = 0x1bc,
+ .dpd2_req = 0x1c0,
+ .dpd2_status = 0x1c4,
+};
+
+static void tegra20_pmc_init(struct tegra_pmc *pmc)
+{
+ u32 value;
+
+ /* Always enable CPU power request */
+ value = tegra_pmc_readl(PMC_CNTRL);
+ value |= PMC_CNTRL_CPU_PWRREQ_OE;
+ tegra_pmc_writel(value, PMC_CNTRL);
+
+ value = tegra_pmc_readl(PMC_CNTRL);
+
+ if (pmc->sysclkreq_high)
+ value &= ~PMC_CNTRL_SYSCLK_POLARITY;
+ else
+ value |= PMC_CNTRL_SYSCLK_POLARITY;
+
+ /* configure the output polarity while the request is tristated */
+ tegra_pmc_writel(value, PMC_CNTRL);
+
+ /* now enable the request */
+ value = tegra_pmc_readl(PMC_CNTRL);
+ value |= PMC_CNTRL_SYSCLK_OE;
+ tegra_pmc_writel(value, PMC_CNTRL);
+}
+
+static void tegra20_pmc_setup_irq_polarity(struct tegra_pmc *pmc,
+ struct device_node *np,
+ bool invert)
+{
+ u32 value;
+
+ value = tegra_pmc_readl(PMC_CNTRL);
+
+ if (invert)
+ value |= PMC_CNTRL_INTR_POLARITY;
+ else
+ value &= ~PMC_CNTRL_INTR_POLARITY;
+
+ tegra_pmc_writel(value, PMC_CNTRL);
+}
+
static const struct tegra_pmc_soc tegra20_pmc_soc = {
.num_powergates = ARRAY_SIZE(tegra20_powergates),
.powergates = tegra20_powergates,
@@ -1481,6 +1566,11 @@ static const struct tegra_pmc_soc tegra20_pmc_soc = {
.cpu_powergates = NULL,
.has_tsense_reset = false,
.has_gpu_clamps = false,
+ .num_io_pads = 0,
+ .io_pads = NULL,
+ .regs = &tegra20_pmc_regs,
+ .init = tegra20_pmc_init,
+ .setup_irq_polarity = tegra20_pmc_setup_irq_polarity,
};
static const char * const tegra30_powergates[] = {
@@ -1514,6 +1604,11 @@ static const struct tegra_pmc_soc tegra30_pmc_soc = {
.cpu_powergates = tegra30_cpu_powergates,
.has_tsense_reset = true,
.has_gpu_clamps = false,
+ .num_io_pads = 0,
+ .io_pads = NULL,
+ .regs = &tegra20_pmc_regs,
+ .init = tegra20_pmc_init,
+ .setup_irq_polarity = tegra20_pmc_setup_irq_polarity,
};
static const char * const tegra114_powergates[] = {
@@ -1551,6 +1646,11 @@ static const struct tegra_pmc_soc tegra114_pmc_soc = {
.cpu_powergates = tegra114_cpu_powergates,
.has_tsense_reset = true,
.has_gpu_clamps = false,
+ .num_io_pads = 0,
+ .io_pads = NULL,
+ .regs = &tegra20_pmc_regs,
+ .init = tegra20_pmc_init,
+ .setup_irq_polarity = tegra20_pmc_setup_irq_polarity,
};
static const char * const tegra124_powergates[] = {
@@ -1628,6 +1728,9 @@ static const struct tegra_pmc_soc tegra124_pmc_soc = {
.has_gpu_clamps = true,
.num_io_pads = ARRAY_SIZE(tegra124_io_pads),
.io_pads = tegra124_io_pads,
+ .regs = &tegra20_pmc_regs,
+ .init = tegra20_pmc_init,
+ .setup_irq_polarity = tegra20_pmc_setup_irq_polarity,
};
static const char * const tegra210_powergates[] = {
@@ -1714,9 +1817,110 @@ static const struct tegra_pmc_soc tegra210_pmc_soc = {
.has_gpu_clamps = true,
.num_io_pads = ARRAY_SIZE(tegra210_io_pads),
.io_pads = tegra210_io_pads,
+ .regs = &tegra20_pmc_regs,
+ .init = tegra20_pmc_init,
+ .setup_irq_polarity = tegra20_pmc_setup_irq_polarity,
+};
+
+static const struct tegra_io_pad_soc tegra186_io_pads[] = {
+ { .id = TEGRA_IO_PAD_CSIA, .dpd = 0, .voltage = UINT_MAX },
+ { .id = TEGRA_IO_PAD_CSIB, .dpd = 1, .voltage = UINT_MAX },
+ { .id = TEGRA_IO_PAD_DSI, .dpd = 2, .voltage = UINT_MAX },
+ { .id = TEGRA_IO_PAD_MIPI_BIAS, .dpd = 3, .voltage = UINT_MAX },
+ { .id = TEGRA_IO_PAD_PEX_CLK_BIAS, .dpd = 4, .voltage = UINT_MAX },
+ { .id = TEGRA_IO_PAD_PEX_CLK3, .dpd = 5, .voltage = UINT_MAX },
+ { .id = TEGRA_IO_PAD_PEX_CLK2, .dpd = 6, .voltage = UINT_MAX },
+ { .id = TEGRA_IO_PAD_PEX_CLK1, .dpd = 7, .voltage = UINT_MAX },
+ { .id = TEGRA_IO_PAD_USB0, .dpd = 9, .voltage = UINT_MAX },
+ { .id = TEGRA_IO_PAD_USB1, .dpd = 10, .voltage = UINT_MAX },
+ { .id = TEGRA_IO_PAD_USB2, .dpd = 11, .voltage = UINT_MAX },
+ { .id = TEGRA_IO_PAD_USB_BIAS, .dpd = 12, .voltage = UINT_MAX },
+ { .id = TEGRA_IO_PAD_UART, .dpd = 14, .voltage = UINT_MAX },
+ { .id = TEGRA_IO_PAD_AUDIO, .dpd = 17, .voltage = UINT_MAX },
+ { .id = TEGRA_IO_PAD_HSIC, .dpd = 19, .voltage = UINT_MAX },
+ { .id = TEGRA_IO_PAD_DBG, .dpd = 25, .voltage = UINT_MAX },
+ { .id = TEGRA_IO_PAD_HDMI_DP0, .dpd = 28, .voltage = UINT_MAX },
+ { .id = TEGRA_IO_PAD_HDMI_DP1, .dpd = 29, .voltage = UINT_MAX },
+ { .id = TEGRA_IO_PAD_PEX_CNTRL, .dpd = 32, .voltage = UINT_MAX },
+ { .id = TEGRA_IO_PAD_SDMMC2_HV, .dpd = 34, .voltage = UINT_MAX },
+ { .id = TEGRA_IO_PAD_SDMMC4, .dpd = 36, .voltage = UINT_MAX },
+ { .id = TEGRA_IO_PAD_CAM, .dpd = 38, .voltage = UINT_MAX },
+ { .id = TEGRA_IO_PAD_DSIB, .dpd = 40, .voltage = UINT_MAX },
+ { .id = TEGRA_IO_PAD_DSIC, .dpd = 41, .voltage = UINT_MAX },
+ { .id = TEGRA_IO_PAD_DSID, .dpd = 42, .voltage = UINT_MAX },
+ { .id = TEGRA_IO_PAD_CSIC, .dpd = 43, .voltage = UINT_MAX },
+ { .id = TEGRA_IO_PAD_CSID, .dpd = 44, .voltage = UINT_MAX },
+ { .id = TEGRA_IO_PAD_CSIE, .dpd = 45, .voltage = UINT_MAX },
+ { .id = TEGRA_IO_PAD_CSIF, .dpd = 46, .voltage = UINT_MAX },
+ { .id = TEGRA_IO_PAD_SPI, .dpd = 47, .voltage = UINT_MAX },
+ { .id = TEGRA_IO_PAD_UFS, .dpd = 49, .voltage = UINT_MAX },
+ { .id = TEGRA_IO_PAD_DMIC_HV, .dpd = 52, .voltage = UINT_MAX },
+ { .id = TEGRA_IO_PAD_EDP, .dpd = 53, .voltage = UINT_MAX },
+ { .id = TEGRA_IO_PAD_SDMMC1_HV, .dpd = 55, .voltage = UINT_MAX },
+ { .id = TEGRA_IO_PAD_SDMMC3_HV, .dpd = 56, .voltage = UINT_MAX },
+ { .id = TEGRA_IO_PAD_CONN, .dpd = 60, .voltage = UINT_MAX },
+ { .id = TEGRA_IO_PAD_AUDIO_HV, .dpd = 61, .voltage = UINT_MAX },
+};
+
+static const struct tegra_pmc_regs tegra186_pmc_regs = {
+ .scratch0 = 0x2000,
+ .dpd_req = 0x74,
+ .dpd_status = 0x78,
+ .dpd2_req = 0x7c,
+ .dpd2_status = 0x80,
+};
+
+static void tegra186_pmc_setup_irq_polarity(struct tegra_pmc *pmc,
+ struct device_node *np,
+ bool invert)
+{
+ struct resource regs;
+ void __iomem *wake;
+ u32 value;
+ int index;
+
+ index = of_property_match_string(np, "reg-names", "wake");
+ if (index < 0) {
+ pr_err("failed to find PMC wake registers\n");
+ return;
+ }
+
+ of_address_to_resource(np, index, &regs);
+
+ wake = ioremap_nocache(regs.start, resource_size(&regs));
+ if (!wake) {
+ pr_err("failed to map PMC wake registers\n");
+ return;
+ }
+
+ value = readl(wake + WAKE_AOWAKE_CTRL);
+
+ if (invert)
+ value |= WAKE_AOWAKE_CTRL_INTR_POLARITY;
+ else
+ value &= ~WAKE_AOWAKE_CTRL_INTR_POLARITY;
+
+ writel(value, wake + WAKE_AOWAKE_CTRL);
+
+ iounmap(wake);
+}
+
+static const struct tegra_pmc_soc tegra186_pmc_soc = {
+ .num_powergates = 0,
+ .powergates = NULL,
+ .num_cpu_powergates = 0,
+ .cpu_powergates = NULL,
+ .has_tsense_reset = false,
+ .has_gpu_clamps = false,
+ .num_io_pads = ARRAY_SIZE(tegra186_io_pads),
+ .io_pads = tegra186_io_pads,
+ .regs = &tegra186_pmc_regs,
+ .init = NULL,
+ .setup_irq_polarity = tegra186_pmc_setup_irq_polarity,
};
static const struct of_device_id tegra_pmc_match[] = {
+ { .compatible = "nvidia,tegra186-pmc", .data = &tegra186_pmc_soc },
{ .compatible = "nvidia,tegra210-pmc", .data = &tegra210_pmc_soc },
{ .compatible = "nvidia,tegra132-pmc", .data = &tegra124_pmc_soc },
{ .compatible = "nvidia,tegra124-pmc", .data = &tegra124_pmc_soc },
@@ -1749,7 +1953,6 @@ static int __init tegra_pmc_early_init(void)
struct device_node *np;
struct resource regs;
bool invert;
- u32 value;
mutex_init(&pmc->powergates_lock);
@@ -1810,14 +2013,7 @@ static int __init tegra_pmc_early_init(void)
*/
invert = of_property_read_bool(np, "nvidia,invert-interrupt");
- value = tegra_pmc_readl(PMC_CNTRL);
-
- if (invert)
- value |= PMC_CNTRL_INTR_POLARITY;
- else
- value &= ~PMC_CNTRL_INTR_POLARITY;
-
- tegra_pmc_writel(value, PMC_CNTRL);
+ pmc->soc->setup_irq_polarity(pmc, np, invert);
of_node_put(np);
}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.