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-rw-r--r--drivers/Kconfig1
-rw-r--r--drivers/Makefile1
-rw-r--r--drivers/soc/imx/Kconfig9
-rw-r--r--drivers/soc/imx/Makefile1
-rw-r--r--drivers/soc/imx/gpcv2.c315
5 files changed, 327 insertions, 0 deletions
diff --git a/drivers/Kconfig b/drivers/Kconfig
index c3bf9dfe18..c6c2eb14db 100644
--- a/drivers/Kconfig
+++ b/drivers/Kconfig
@@ -38,5 +38,6 @@ source "drivers/firmware/Kconfig"
source "drivers/phy/Kconfig"
source "drivers/crypto/Kconfig"
source "drivers/memory/Kconfig"
+source "drivers/soc/imx/Kconfig"
endmenu
diff --git a/drivers/Makefile b/drivers/Makefile
index 767789d541..752fd66242 100644
--- a/drivers/Makefile
+++ b/drivers/Makefile
@@ -38,3 +38,4 @@ obj-$(CONFIG_HAB) += hab/
obj-$(CONFIG_CRYPTO_HW) += crypto/
obj-$(CONFIG_AIODEV) += aiodev/
obj-y += memory/
+obj-y += soc/imx/
diff --git a/drivers/soc/imx/Kconfig b/drivers/soc/imx/Kconfig
new file mode 100644
index 0000000000..a78a9e3967
--- /dev/null
+++ b/drivers/soc/imx/Kconfig
@@ -0,0 +1,9 @@
+menu "i.MX SoC drivers"
+
+config IMX7_PM_DOMAINS
+ bool "i.MX7 PM domains"
+ depends on ARCH_IMX7
+ select PM_GENERIC_DOMAINS
+ default y if ARCH_IMX7
+
+endmenu
diff --git a/drivers/soc/imx/Makefile b/drivers/soc/imx/Makefile
new file mode 100644
index 0000000000..b039f77dc1
--- /dev/null
+++ b/drivers/soc/imx/Makefile
@@ -0,0 +1 @@
+obj-$(CONFIG_IMX7_PM_DOMAINS) += gpcv2.o
diff --git a/drivers/soc/imx/gpcv2.c b/drivers/soc/imx/gpcv2.c
new file mode 100644
index 0000000000..158bfc02de
--- /dev/null
+++ b/drivers/soc/imx/gpcv2.c
@@ -0,0 +1,315 @@
+/*
+ * Copyright 2017 Impinj, Inc
+ * Author: Andrey Smirnov <andrew.smirnov@gmail.com>
+ *
+ * Based on the code of analogus driver:
+ *
+ * Copyright 2015-2017 Pengutronix, Lucas Stach <kernel@pengutronix.de>
+ *
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+
+#include <common.h>
+#include <clock.h>
+#include <abort.h>
+#include <malloc.h>
+#include <io.h>
+#include <init.h>
+#include <linux/iopoll.h>
+
+#include <pm_domain.h>
+#include <regulator.h>
+#include <dt-bindings/power/imx7-power.h>
+
+#define GPC_LPCR_A7_BSC 0x000
+
+#define GPC_PGC_CPU_MAPPING 0x0ec
+#define USB_HSIC_PHY_A7_DOMAIN BIT(6)
+#define USB_OTG2_PHY_A7_DOMAIN BIT(5)
+#define USB_OTG1_PHY_A7_DOMAIN BIT(4)
+#define PCIE_PHY_A7_DOMAIN BIT(3)
+#define MIPI_PHY_A7_DOMAIN BIT(2)
+
+#define GPC_PU_PGC_SW_PUP_REQ 0x0f8
+#define GPC_PU_PGC_SW_PDN_REQ 0x104
+#define USB_HSIC_PHY_SW_Pxx_REQ BIT(4)
+#define USB_OTG2_PHY_SW_Pxx_REQ BIT(3)
+#define USB_OTG1_PHY_SW_Pxx_REQ BIT(2)
+#define PCIE_PHY_SW_Pxx_REQ BIT(1)
+#define MIPI_PHY_SW_Pxx_REQ BIT(0)
+
+#define GPC_M4_PU_PDN_FLG 0x1bc
+
+/*
+ * The PGC offset values in Reference Manual
+ * (Rev. 1, 01/2018 and the older ones) GPC chapter's
+ * GPC_PGC memory map are incorrect, below offset
+ * values are from design RTL.
+ */
+#define PGC_MIPI 16
+#define PGC_PCIE 17
+#define PGC_USB_HSIC 20
+#define GPC_PGC_CTRL(n) (0x800 + (n) * 0x40)
+#define GPC_PGC_SR(n) (GPC_PGC_CTRL(n) + 0xc)
+
+#define GPC_PGC_CTRL_PCR BIT(0)
+
+struct imx7_pgc_domain {
+ struct generic_pm_domain genpd;
+ void __iomem *base;
+ struct regulator *regulator;
+
+ unsigned int pgc;
+
+ const struct {
+ u32 pxx;
+ u32 map;
+ } bits;
+
+ const int voltage;
+ struct device_d *dev;
+};
+
+static int imx7_gpc_pu_pgc_sw_pxx_req(struct generic_pm_domain *genpd,
+ bool on)
+{
+ struct imx7_pgc_domain *domain = container_of(genpd,
+ struct imx7_pgc_domain,
+ genpd);
+ unsigned int offset = on ?
+ GPC_PU_PGC_SW_PUP_REQ : GPC_PU_PGC_SW_PDN_REQ;
+ const bool enable_power_control = !on;
+ const bool has_regulator = !IS_ERR(domain->regulator);
+ int ret = 0;
+ unsigned int mapping, ctrl = 0, pxx;
+
+ mapping = readl(domain->base + GPC_PGC_CPU_MAPPING);
+ mapping |= domain->bits.map;
+ writel(mapping, domain->base + GPC_PGC_CPU_MAPPING);
+
+ if (has_regulator && on) {
+ ret = regulator_enable(domain->regulator);
+ if (ret) {
+ dev_err(domain->dev, "failed to enable regulator\n");
+ goto unmap;
+ }
+ }
+
+ if (enable_power_control) {
+ ctrl = readl(domain->base + GPC_PGC_CTRL(domain->pgc));
+ ctrl |= GPC_PGC_CTRL_PCR;
+ writel(ctrl, domain->base + GPC_PGC_CTRL(domain->pgc));
+ }
+
+ pxx = readl(domain->base + offset);
+ pxx |= domain->bits.pxx;
+ writel(pxx, domain->base + offset);
+
+ /*
+ * As per "5.5.9.4 Example Code 4" in IMX7DRM.pdf wait
+ * for PUP_REQ/PDN_REQ bit to be cleared
+ */
+ ret = readl_poll_timeout(domain->base + offset, pxx,
+ !(pxx & domain->bits.pxx), MSECOND);
+ if (ret < 0) {
+ dev_err(domain->dev, "falied to command PGC\n");
+ /*
+ * If we were in a process of enabling a
+ * domain and failed we might as well disable
+ * the regulator we just enabled. And if it
+ * was the opposite situation and we failed to
+ * power down -- keep the regulator on
+ */
+ on = !on;
+ }
+
+ if (enable_power_control) {
+ ctrl &= ~GPC_PGC_CTRL_PCR;
+ writel(ctrl, domain->base + GPC_PGC_CTRL(domain->pgc));
+ }
+
+ if (has_regulator && !on) {
+ int err;
+
+ err = regulator_disable(domain->regulator);
+ if (err)
+ dev_err(domain->dev,
+ "failed to disable regulator: %d\n", ret);
+ /* Preserve earlier error code */
+ ret = ret ?: err;
+ }
+unmap:
+ mapping &= ~domain->bits.map;
+ writel(mapping, domain->base + GPC_PGC_CPU_MAPPING);
+
+ return ret;
+}
+
+static int imx7_gpc_pu_pgc_sw_pup_req(struct generic_pm_domain *genpd)
+{
+ return imx7_gpc_pu_pgc_sw_pxx_req(genpd, true);
+}
+
+static int imx7_gpc_pu_pgc_sw_pdn_req(struct generic_pm_domain *genpd)
+{
+ return imx7_gpc_pu_pgc_sw_pxx_req(genpd, false);
+}
+
+static const struct imx7_pgc_domain imx7_pgc_domains[] = {
+ [IMX7_POWER_DOMAIN_MIPI_PHY] = {
+ .genpd = {
+ .name = "mipi-phy",
+ },
+ .bits = {
+ .pxx = MIPI_PHY_SW_Pxx_REQ,
+ .map = MIPI_PHY_A7_DOMAIN,
+ },
+ .voltage = 1000000,
+ .pgc = PGC_MIPI,
+ },
+
+ [IMX7_POWER_DOMAIN_PCIE_PHY] = {
+ .genpd = {
+ .name = "pcie-phy",
+ },
+ .bits = {
+ .pxx = PCIE_PHY_SW_Pxx_REQ,
+ .map = PCIE_PHY_A7_DOMAIN,
+ },
+ .voltage = 1000000,
+ .pgc = PGC_PCIE,
+ },
+
+ [IMX7_POWER_DOMAIN_USB_HSIC_PHY] = {
+ .genpd = {
+ .name = "usb-hsic-phy",
+ },
+ .bits = {
+ .pxx = USB_HSIC_PHY_SW_Pxx_REQ,
+ .map = USB_HSIC_PHY_A7_DOMAIN,
+ },
+ .voltage = 1200000,
+ .pgc = PGC_USB_HSIC,
+ },
+};
+
+static int imx7_pgc_domain_probe(struct device_d *dev)
+{
+ struct imx7_pgc_domain *domain = dev->priv;
+ int ret;
+
+ domain->dev = dev;
+
+ domain->regulator = regulator_get(domain->dev, "power");
+ if (IS_ERR(domain->regulator)) {
+ if (PTR_ERR(domain->regulator) != -ENODEV) {
+ if (PTR_ERR(domain->regulator) != -EPROBE_DEFER)
+ dev_err(domain->dev, "Failed to get domain's regulator\n");
+ return PTR_ERR(domain->regulator);
+ }
+ } else {
+ regulator_set_voltage(domain->regulator,
+ domain->voltage, domain->voltage);
+ }
+
+ ret = pm_genpd_init(&domain->genpd, NULL, true);
+ if (ret) {
+ dev_err(domain->dev, "Failed to init power domain\n");
+ return ret;
+ }
+
+ ret = of_genpd_add_provider_simple(domain->dev->device_node,
+ &domain->genpd);
+ if (ret) {
+ dev_err(domain->dev, "Failed to add genpd provider\n");
+ }
+
+ return ret;
+}
+
+static const struct platform_device_id imx7_pgc_domain_id[] = {
+ { "imx7-pgc-domain", },
+ { },
+};
+
+static struct driver_d imx7_pgc_domain_driver = {
+ .name = "imx-pgc",
+ .probe = imx7_pgc_domain_probe,
+ .id_table = imx7_pgc_domain_id,
+};
+coredevice_platform_driver(imx7_pgc_domain_driver);
+
+static int imx_gpcv2_probe(struct device_d *dev)
+{
+ struct device_node *pgc_np, *np;
+ struct resource *res;
+ void __iomem *base;
+ int ret;
+
+ pgc_np = of_get_child_by_name(dev->device_node, "pgc");
+ if (!pgc_np) {
+ dev_err(dev, "No power domains specified in DT\n");
+ return -EINVAL;
+ }
+
+ res = dev_request_mem_resource(dev, 0);
+ if (IS_ERR(res))
+ return PTR_ERR(res);
+
+ base = IOMEM(res->start);
+
+ for_each_child_of_node(pgc_np, np) {
+ struct device_d *pd_dev;
+ struct imx7_pgc_domain *domain;
+ u32 domain_index;
+ ret = of_property_read_u32(np, "reg", &domain_index);
+ if (ret) {
+ dev_err(dev, "Failed to read 'reg' property\n");
+ return ret;
+ }
+
+ if (domain_index >= ARRAY_SIZE(imx7_pgc_domains)) {
+ dev_warn(dev,
+ "Domain index %d is out of bounds\n",
+ domain_index);
+ continue;
+ }
+
+ domain = xmemdup(&imx7_pgc_domains[domain_index],
+ sizeof(imx7_pgc_domains[domain_index]));
+ domain->base = base;
+ domain->genpd.power_on = imx7_gpc_pu_pgc_sw_pup_req;
+ domain->genpd.power_off = imx7_gpc_pu_pgc_sw_pdn_req;
+
+ pd_dev = xzalloc(sizeof(*pd_dev));
+ pd_dev->device_node = np;
+ pd_dev->id = domain_index;
+ pd_dev->parent = dev;
+ pd_dev->priv = domain;
+ pd_dev->device_node = np;
+ dev_set_name(pd_dev, imx7_pgc_domain_id[0].name);
+
+ ret = platform_device_register(pd_dev);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+static const struct of_device_id imx_gpcv2_dt_ids[] = {
+ { .compatible = "fsl,imx7d-gpc" },
+ { }
+};
+
+static struct driver_d imx_gpcv2_driver = {
+ .name = "imx7d-gpc",
+ .probe = imx_gpcv2_probe,
+ .of_compatible = DRV_OF_COMPAT(imx_gpcv2_dt_ids),
+};
+coredevice_platform_driver(imx_gpcv2_driver);