diff options
Diffstat (limited to 'drivers/sysinfo')
| -rw-r--r-- | drivers/sysinfo/Kconfig | 25 | ||||
| -rw-r--r-- | drivers/sysinfo/Makefile | 7 | ||||
| -rw-r--r-- | drivers/sysinfo/gazerbeam.c | 265 | ||||
| -rw-r--r-- | drivers/sysinfo/gazerbeam.h | 17 | ||||
| -rw-r--r-- | drivers/sysinfo/sandbox.c | 107 | ||||
| -rw-r--r-- | drivers/sysinfo/sandbox.h | 12 | ||||
| -rw-r--r-- | drivers/sysinfo/sysinfo-uclass.c | 71 |
7 files changed, 504 insertions, 0 deletions
diff --git a/drivers/sysinfo/Kconfig b/drivers/sysinfo/Kconfig new file mode 100644 index 0000000..3914150 --- /dev/null +++ b/drivers/sysinfo/Kconfig @@ -0,0 +1,25 @@ +menuconfig SYSINFO + bool "Device System Information" + help + Support methods to query hardware configurations from internal + mechanisms (e.g. reading GPIO values, determining the presence of + devices on busses, etc.). This enables the usage of U-Boot with + modular board architectures. + +if SYSINFO + +config SPL_SYSINFO + depends on SPL_DM + bool "Enable board driver support in SPL" + +config SYSINFO_GAZERBEAM + bool "Enable sysinfo driver for the Gazerbeam board" + help + Support querying device information for the gdsys Gazerbeam board. + +config SYSINFO_SANDBOX + bool "Enable sysinfo driver for the Sandbox board" + help + Support querying device information for the Sandbox boards. + +endif diff --git a/drivers/sysinfo/Makefile b/drivers/sysinfo/Makefile new file mode 100644 index 0000000..aecf0b0 --- /dev/null +++ b/drivers/sysinfo/Makefile @@ -0,0 +1,7 @@ +# SPDX-License-Identifier: GPL-2.0+ +# +# (C) Copyright 2017 +# Mario Six, Guntermann & Drunck GmbH, mario.six@gdsys.cc +obj-y += sysinfo-uclass.o +obj-$(CONFIG_SYSINFO_GAZERBEAM) += gazerbeam.o +obj-$(CONFIG_SYSINFO_SANDBOX) += sandbox.o diff --git a/drivers/sysinfo/gazerbeam.c b/drivers/sysinfo/gazerbeam.c new file mode 100644 index 0000000..9e7a496 --- /dev/null +++ b/drivers/sysinfo/gazerbeam.c @@ -0,0 +1,265 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * (C) Copyright 2017 + * Mario Six, Guntermann & Drunck GmbH, mario.six@gdsys.cc + */ + +#include <common.h> +#include <dm.h> +#include <sysinfo.h> +#include <i2c.h> +#include <log.h> +#include <asm/gpio.h> + +#include "gazerbeam.h" + +/* Sequence number of I2C bus that holds the GPIO expanders */ +static const int I2C_BUS_SEQ_NO = 1; + +/* I2C address of SC/MC2 expander */ +static const int MC2_EXPANDER_ADDR = 0x20; +/* I2C address of MC4 expander */ +static const int MC4_EXPANDER_ADDR = 0x22; + +/* Number of the GPIO to read the SC data from */ +static const int SC_GPIO_NO; +/* Number of the GPIO to read the CON data from */ +static const int CON_GPIO_NO = 1; + +/** + * struct sysinfo_gazerbeam_priv - Private data structure for the gazerbeam + * sysinfo driver + * @reset_gpios: GPIOs for the sysinfo's reset GPIOs. + * @var_gpios: GPIOs for the sysinfo's hardware variant GPIOs + * @ver_gpios: GPIOs for the sysinfo's hardware version GPIOs + * @variant: Container for the sysinfo's hardware variant (CON/CPU) + * @multichannel: Container for the sysinfo's multichannel variant (MC4/MC2/SC) + * @hwversion: Container for the sysinfo's hardware version + */ +struct sysinfo_gazerbeam_priv { + struct gpio_desc reset_gpios[2]; + struct gpio_desc var_gpios[2]; + struct gpio_desc ver_gpios[4]; + int variant; + int multichannel; + int hwversion; +}; + +/** + * _read_sysinfo_variant_data() - Read variant information from the hardware. + * @dev: The sysinfo device for which to determine the multichannel and device + * type information. + * + * The data read from the sysinfo's hardware (mostly hard-wired GPIOs) is stored + * in the private data structure of the driver to be used by other driver + * methods. + * + * Return: 0 if OK, -ve on error. + */ +static int _read_sysinfo_variant_data(struct udevice *dev) +{ + struct sysinfo_gazerbeam_priv *priv = dev_get_priv(dev); + struct udevice *i2c_bus; + struct udevice *dummy; + char *listname; + int mc4, mc2, sc, mc2_sc, con; + int gpio_num; + int res; + + res = uclass_get_device_by_seq(UCLASS_I2C, I2C_BUS_SEQ_NO, &i2c_bus); + if (res) { + debug("%s: Could not get I2C bus %d (err = %d)\n", + dev->name, I2C_BUS_SEQ_NO, res); + return res; + } + + if (!i2c_bus) { + debug("%s: Could not get I2C bus %d\n", + dev->name, I2C_BUS_SEQ_NO); + return -EIO; + } + + mc2_sc = !dm_i2c_probe(i2c_bus, MC2_EXPANDER_ADDR, 0, &dummy); + mc4 = !dm_i2c_probe(i2c_bus, MC4_EXPANDER_ADDR, 0, &dummy); + + if (mc2_sc && mc4) { + debug("%s: Board hardware configuration inconsistent.\n", + dev->name); + return -EINVAL; + } + + listname = mc2_sc ? "var-gpios-mc2" : "var-gpios-mc4"; + + gpio_num = gpio_request_list_by_name(dev, listname, priv->var_gpios, + ARRAY_SIZE(priv->var_gpios), + GPIOD_IS_IN); + if (gpio_num < 0) { + debug("%s: Requesting gpio list %s failed (err = %d).\n", + dev->name, listname, gpio_num); + return gpio_num; + } + + sc = dm_gpio_get_value(&priv->var_gpios[SC_GPIO_NO]); + if (sc < 0) { + debug("%s: Error while reading 'sc' GPIO (err = %d)", + dev->name, sc); + return sc; + } + + mc2 = mc2_sc ? (sc ? 0 : 1) : 0; + + if ((sc && mc2) || (sc && mc4) || (!sc && !mc2 && !mc4)) { + debug("%s: Board hardware configuration inconsistent.\n", + dev->name); + return -EINVAL; + } + + con = dm_gpio_get_value(&priv->var_gpios[CON_GPIO_NO]); + if (con < 0) { + debug("%s: Error while reading 'con' GPIO (err = %d)", + dev->name, con); + return con; + } + + priv->variant = con ? VAR_CON : VAR_CPU; + + priv->multichannel = mc4 ? 4 : (mc2 ? 2 : (sc ? 1 : 0)); + + return 0; +} + +/** + * _read_hwversion() - Read the hardware version from the sysinfo. + * @dev: The sysinfo device for which to read the hardware version. + * + * The hardware version read from the sysinfo (from hard-wired GPIOs) is stored + * in the private data structure of the driver to be used by other driver + * methods. + * + * Return: 0 if OK, -ve on error. + */ +static int _read_hwversion(struct udevice *dev) +{ + struct sysinfo_gazerbeam_priv *priv = dev_get_priv(dev); + int res; + + res = gpio_request_list_by_name(dev, "ver-gpios", priv->ver_gpios, + ARRAY_SIZE(priv->ver_gpios), + GPIOD_IS_IN); + if (res < 0) { + debug("%s: Error getting GPIO list 'ver-gpios' (err = %d)\n", + dev->name, res); + return -ENODEV; + } + + res = dm_gpio_get_values_as_int(priv->ver_gpios, + ARRAY_SIZE(priv->ver_gpios)); + if (res < 0) { + debug("%s: Error reading HW version from expander (err = %d)\n", + dev->name, res); + return res; + } + + priv->hwversion = res; + + res = gpio_free_list(dev, priv->ver_gpios, ARRAY_SIZE(priv->ver_gpios)); + if (res < 0) { + debug("%s: Error freeing HW version GPIO list (err = %d)\n", + dev->name, res); + return res; + } + + return 0; +} + +static int sysinfo_gazerbeam_detect(struct udevice *dev) +{ + int res; + + res = _read_sysinfo_variant_data(dev); + if (res) { + debug("%s: Error reading multichannel variant (err = %d)\n", + dev->name, res); + return res; + } + + res = _read_hwversion(dev); + if (res) { + debug("%s: Error reading hardware version (err = %d)\n", + dev->name, res); + return res; + } + + return 0; +} + +static int sysinfo_gazerbeam_get_int(struct udevice *dev, int id, int *val) +{ + struct sysinfo_gazerbeam_priv *priv = dev_get_priv(dev); + + switch (id) { + case BOARD_MULTICHANNEL: + *val = priv->multichannel; + break; + case BOARD_VARIANT: + *val = priv->variant; + break; + case BOARD_HWVERSION: + *val = priv->hwversion; + break; + default: + debug("%s: Integer value %d unknown\n", dev->name, id); + return -EINVAL; + } + + return 0; +} + +static const struct udevice_id sysinfo_gazerbeam_ids[] = { + { .compatible = "gdsys,sysinfo-gazerbeam" }, + { /* sentinel */ } +}; + +static const struct sysinfo_ops sysinfo_gazerbeam_ops = { + .detect = sysinfo_gazerbeam_detect, + .get_int = sysinfo_gazerbeam_get_int, +}; + +static int sysinfo_gazerbeam_probe(struct udevice *dev) +{ + struct sysinfo_gazerbeam_priv *priv = dev_get_priv(dev); + int gpio_num, i; + + gpio_num = gpio_request_list_by_name(dev, "reset-gpios", + priv->reset_gpios, + ARRAY_SIZE(priv->reset_gpios), + GPIOD_IS_OUT); + + if (gpio_num < 0) { + debug("%s: Error getting GPIO list 'reset-gpios' (err = %d)\n", + dev->name, gpio_num); + return gpio_num; + } + + /* Set startup-finished GPIOs */ + for (i = 0; i < ARRAY_SIZE(priv->reset_gpios); i++) { + int res = dm_gpio_set_value(&priv->reset_gpios[i], 0); + + if (res) { + debug("%s: Error while setting GPIO %d (err = %d)\n", + dev->name, i, res); + return res; + } + } + + return 0; +} + +U_BOOT_DRIVER(sysinfo_gazerbeam) = { + .name = "sysinfo_gazerbeam", + .id = UCLASS_SYSINFO, + .of_match = sysinfo_gazerbeam_ids, + .ops = &sysinfo_gazerbeam_ops, + .priv_auto_alloc_size = sizeof(struct sysinfo_gazerbeam_priv), + .probe = sysinfo_gazerbeam_probe, +}; diff --git a/drivers/sysinfo/gazerbeam.h b/drivers/sysinfo/gazerbeam.h new file mode 100644 index 0000000..171729d --- /dev/null +++ b/drivers/sysinfo/gazerbeam.h @@ -0,0 +1,17 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * (C) Copyright 2017 + * Mario Six, Guntermann & Drunck GmbH, mario.six@gdsys.cc + * + */ + +enum { + BOARD_MULTICHANNEL, + BOARD_VARIANT, + BOARD_HWVERSION, +}; + +enum { + VAR_CON, + VAR_CPU, +}; diff --git a/drivers/sysinfo/sandbox.c b/drivers/sysinfo/sandbox.c new file mode 100644 index 0000000..62a1cb4 --- /dev/null +++ b/drivers/sysinfo/sandbox.c @@ -0,0 +1,107 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * (C) Copyright 2018 + * Mario Six, Guntermann & Drunck GmbH, mario.six@gdsys.cc + */ + +#include <common.h> +#include <dm.h> +#include <sysinfo.h> + +#include "sandbox.h" + +struct sysinfo_sandbox_priv { + bool called_detect; + int test_i1; + int test_i2; +}; + +char vacation_spots[][64] = {"R'lyeh", "Dreamlands", "Plateau of Leng", + "Carcosa", "Yuggoth", "The Nameless City"}; + +int sysinfo_sandbox_detect(struct udevice *dev) +{ + struct sysinfo_sandbox_priv *priv = dev_get_priv(dev); + + priv->called_detect = true; + priv->test_i2 = 100; + + return 0; +} + +int sysinfo_sandbox_get_bool(struct udevice *dev, int id, bool *val) +{ + struct sysinfo_sandbox_priv *priv = dev_get_priv(dev); + + switch (id) { + case BOOL_CALLED_DETECT: + /* Checks if the dectect method has been called */ + *val = priv->called_detect; + return 0; + } + + return -ENOENT; +} + +int sysinfo_sandbox_get_int(struct udevice *dev, int id, int *val) +{ + struct sysinfo_sandbox_priv *priv = dev_get_priv(dev); + + switch (id) { + case INT_TEST1: + *val = priv->test_i1; + /* Increments with every call */ + priv->test_i1++; + return 0; + case INT_TEST2: + *val = priv->test_i2; + /* Decrements with every call */ + priv->test_i2--; + return 0; + } + + return -ENOENT; +} + +int sysinfo_sandbox_get_str(struct udevice *dev, int id, size_t size, char *val) +{ + struct sysinfo_sandbox_priv *priv = dev_get_priv(dev); + int i1 = priv->test_i1; + int i2 = priv->test_i2; + int index = (i1 * i2) % ARRAY_SIZE(vacation_spots); + + switch (id) { + case STR_VACATIONSPOT: + /* Picks a vacation spot depending on i1 and i2 */ + snprintf(val, size, vacation_spots[index]); + return 0; + } + + return -ENOENT; +} + +static const struct udevice_id sysinfo_sandbox_ids[] = { + { .compatible = "sandbox,sysinfo-sandbox" }, + { /* sentinel */ } +}; + +static const struct sysinfo_ops sysinfo_sandbox_ops = { + .detect = sysinfo_sandbox_detect, + .get_bool = sysinfo_sandbox_get_bool, + .get_int = sysinfo_sandbox_get_int, + .get_str = sysinfo_sandbox_get_str, +}; + +int sysinfo_sandbox_probe(struct udevice *dev) +{ + return 0; +} + +U_BOOT_DRIVER(sysinfo_sandbox) = { + .name = "sysinfo_sandbox", + .id = UCLASS_SYSINFO, + .of_match = sysinfo_sandbox_ids, + .ops = &sysinfo_sandbox_ops, + .priv_auto_alloc_size = sizeof(struct sysinfo_sandbox_priv), + .probe = sysinfo_sandbox_probe, +}; diff --git a/drivers/sysinfo/sandbox.h b/drivers/sysinfo/sandbox.h new file mode 100644 index 0000000..2cff494 --- /dev/null +++ b/drivers/sysinfo/sandbox.h @@ -0,0 +1,12 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * (C) Copyright 2018 + * Mario Six, Guntermann & Drunck GmbH, mario.six@gdsys.cc + */ + +enum { + BOOL_CALLED_DETECT, + INT_TEST1, + INT_TEST2, + STR_VACATIONSPOT, +}; diff --git a/drivers/sysinfo/sysinfo-uclass.c b/drivers/sysinfo/sysinfo-uclass.c new file mode 100644 index 0000000..6df58fe --- /dev/null +++ b/drivers/sysinfo/sysinfo-uclass.c @@ -0,0 +1,71 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * (C) Copyright 2017 + * Mario Six, Guntermann & Drunck GmbH, mario.six@gdsys.cc + */ + +#include <common.h> +#include <dm.h> +#include <sysinfo.h> + +int sysinfo_get(struct udevice **devp) +{ + return uclass_first_device_err(UCLASS_SYSINFO, devp); +} + +int sysinfo_detect(struct udevice *dev) +{ + struct sysinfo_ops *ops = sysinfo_get_ops(dev); + + if (!ops->detect) + return -ENOSYS; + + return ops->detect(dev); +} + +int sysinfo_get_fit_loadable(struct udevice *dev, int index, const char *type, + const char **strp) +{ + struct sysinfo_ops *ops = sysinfo_get_ops(dev); + + if (!ops->get_fit_loadable) + return -ENOSYS; + + return ops->get_fit_loadable(dev, index, type, strp); +} + +int sysinfo_get_bool(struct udevice *dev, int id, bool *val) +{ + struct sysinfo_ops *ops = sysinfo_get_ops(dev); + + if (!ops->get_bool) + return -ENOSYS; + + return ops->get_bool(dev, id, val); +} + +int sysinfo_get_int(struct udevice *dev, int id, int *val) +{ + struct sysinfo_ops *ops = sysinfo_get_ops(dev); + + if (!ops->get_int) + return -ENOSYS; + + return ops->get_int(dev, id, val); +} + +int sysinfo_get_str(struct udevice *dev, int id, size_t size, char *val) +{ + struct sysinfo_ops *ops = sysinfo_get_ops(dev); + + if (!ops->get_str) + return -ENOSYS; + + return ops->get_str(dev, id, size, val); +} + +UCLASS_DRIVER(sysinfo) = { + .id = UCLASS_SYSINFO, + .name = "sysinfo", + .post_bind = dm_scan_fdt_dev, +}; 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