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path: root/drivers/gpio/turris_omnia_mcu.c
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Diffstat (limited to 'drivers/gpio/turris_omnia_mcu.c')
-rw-r--r--drivers/gpio/turris_omnia_mcu.c316
1 files changed, 0 insertions, 316 deletions
diff --git a/drivers/gpio/turris_omnia_mcu.c b/drivers/gpio/turris_omnia_mcu.c
deleted file mode 100644
index 2d2bf2d1dd6..00000000000
--- a/drivers/gpio/turris_omnia_mcu.c
+++ /dev/null
@@ -1,316 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0+
-// (C) 2022 Pali Rohár <pali@kernel.org>
-
-#include <common.h>
-#include <dm.h>
-#include <i2c.h>
-#include <asm/gpio.h>
-#include <linux/log2.h>
-
-enum commands_e {
- CMD_GET_STATUS_WORD = 0x01,
- CMD_GENERAL_CONTROL = 0x02,
-
- /* available if STS_FEATURES_SUPPORTED bit set in status word */
- CMD_GET_FEATURES = 0x10,
-
- /* available if FEAT_EXT_CMDS bit is set in features */
- CMD_GET_EXT_STATUS_DWORD = 0x11,
-
- /* available if FEAT_EXT_CMDS and FEAT_PERIPH_MCU bits are set in featurs */
- CMD_EXT_CONTROL = 0x12,
- CMD_GET_EXT_CONTROL_STATUS = 0x13,
-};
-
-/* CMD_GET_STATUS_WORD */
-enum sts_word_e {
- STS_MCU_TYPE_MASK = GENMASK(1, 0),
- STS_MCU_TYPE_STM32 = 0,
- STS_MCU_TYPE_GD32 = 1,
- STS_MCU_TYPE_MKL = 2,
- STS_FEATURES_SUPPORTED = BIT(2),
- STS_USER_REGULATOR_NOT_SUPPORTED = BIT(3),
- STS_CARD_DET = BIT(4),
- STS_MSATA_IND = BIT(5),
- STS_USB30_OVC = BIT(6),
- STS_USB31_OVC = BIT(7),
- STS_USB30_PWRON = BIT(8),
- STS_USB31_PWRON = BIT(9),
- STS_ENABLE_4V5 = BIT(10),
- STS_BUTTON_MODE = BIT(11),
- STS_BUTTON_PRESSED = BIT(12),
- STS_BUTTON_COUNTER_MASK = GENMASK(15, 13)
-};
-
-/* CMD_GENERAL_CONTROL */
-enum ctl_byte_e {
- CTL_LIGHT_RST = BIT(0),
- CTL_HARD_RST = BIT(1),
- /*CTL_RESERVED = BIT(2),*/
- CTL_USB30_PWRON = BIT(3),
- CTL_USB31_PWRON = BIT(4),
- CTL_ENABLE_4V5 = BIT(5),
- CTL_BUTTON_MODE = BIT(6),
- CTL_BOOTLOADER = BIT(7)
-};
-
-/* CMD_GET_FEATURES */
-enum features_e {
- FEAT_PERIPH_MCU = BIT(0),
- FEAT_EXT_CMDS = BIT(1),
-};
-
-struct turris_omnia_mcu_info {
- u16 features;
-};
-
-static int turris_omnia_mcu_get_function(struct udevice *dev, uint offset)
-{
- struct turris_omnia_mcu_info *info = dev_get_plat(dev);
-
- switch (offset) {
- /* bank 0 */
- case 0 ... 15:
- switch (offset) {
- case ilog2(STS_USB30_PWRON):
- case ilog2(STS_USB31_PWRON):
- case ilog2(STS_ENABLE_4V5):
- case ilog2(STS_BUTTON_MODE):
- return GPIOF_OUTPUT;
- default:
- return GPIOF_INPUT;
- }
-
- /* bank 1 - supported only when FEAT_EXT_CMDS is set */
- case (16 + 0) ... (16 + 31):
- if (!(info->features & FEAT_EXT_CMDS))
- return -EINVAL;
- return GPIOF_INPUT;
-
- /* bank 2 - supported only when FEAT_EXT_CMDS and FEAT_PERIPH_MCU is set */
- case (16 + 32 + 0) ... (16 + 32 + 15):
- if (!(info->features & FEAT_EXT_CMDS))
- return -EINVAL;
- if (!(info->features & FEAT_PERIPH_MCU))
- return -EINVAL;
- return GPIOF_OUTPUT;
-
- default:
- return -EINVAL;
- }
-}
-
-static int turris_omnia_mcu_get_value(struct udevice *dev, uint offset)
-{
- struct turris_omnia_mcu_info *info = dev_get_plat(dev);
- u8 val16[2];
- u8 val32[4];
- int ret;
-
- switch (offset) {
- /* bank 0 */
- case 0 ... 15:
- ret = dm_i2c_read(dev, CMD_GET_STATUS_WORD, val16, 2);
- if (ret)
- return ret;
- return ((((u16)val16[1] << 8) | val16[0]) >> offset) & 0x1;
-
- /* bank 1 - supported only when FEAT_EXT_CMDS is set */
- case (16 + 0) ... (16 + 31):
- if (!(info->features & FEAT_EXT_CMDS))
- return -EINVAL;
- ret = dm_i2c_read(dev, CMD_GET_EXT_STATUS_DWORD, val32, 4);
- if (ret)
- return ret;
- return ((((u32)val32[3] << 24) | ((u32)val32[2] << 16) |
- ((u32)val32[1] << 8) | val32[0]) >> (offset - 16)) & 0x1;
-
- /* bank 2 - supported only when FEAT_EXT_CMDS and FEAT_PERIPH_MCU is set */
- case (16 + 32 + 0) ... (16 + 32 + 15):
- if (!(info->features & FEAT_EXT_CMDS))
- return -EINVAL;
- if (!(info->features & FEAT_PERIPH_MCU))
- return -EINVAL;
- ret = dm_i2c_read(dev, CMD_GET_EXT_CONTROL_STATUS, val16, 2);
- if (ret)
- return ret;
- return ((((u16)val16[1] << 8) | val16[0]) >> (offset - 16 - 32)) & 0x1;
-
- default:
- return -EINVAL;
- }
-}
-
-static int turris_omnia_mcu_set_value(struct udevice *dev, uint offset, int value)
-{
- struct turris_omnia_mcu_info *info = dev_get_plat(dev);
- u8 val16[2];
- u8 val32[4];
-
- switch (offset) {
- /* bank 0 */
- case 0 ... 15:
- switch (offset) {
- case ilog2(STS_USB30_PWRON):
- val16[1] = CTL_USB30_PWRON;
- break;
- case ilog2(STS_USB31_PWRON):
- val16[1] = CTL_USB31_PWRON;
- break;
- case ilog2(STS_ENABLE_4V5):
- val16[1] = CTL_ENABLE_4V5;
- break;
- case ilog2(STS_BUTTON_MODE):
- val16[1] = CTL_BUTTON_MODE;
- break;
- default:
- return -EINVAL;
- }
- val16[0] = value ? val16[1] : 0;
- return dm_i2c_write(dev, CMD_GENERAL_CONTROL, val16, sizeof(val16));
-
- /* bank 2 - supported only when FEAT_EXT_CMDS and FEAT_PERIPH_MCU is set */
- case (16 + 32 + 0) ... (16 + 32 + 15):
- if (!(info->features & FEAT_EXT_CMDS))
- return -EINVAL;
- if (!(info->features & FEAT_PERIPH_MCU))
- return -EINVAL;
- val32[3] = BIT(offset - 16 - 32) >> 8;
- val32[2] = BIT(offset - 16 - 32) & 0xff;
- val32[1] = value ? val32[3] : 0;
- val32[0] = value ? val32[2] : 0;
- return dm_i2c_write(dev, CMD_EXT_CONTROL, val32, sizeof(val32));
-
- default:
- return -EINVAL;
- }
-}
-
-static int turris_omnia_mcu_direction_input(struct udevice *dev, uint offset)
-{
- int ret;
-
- ret = turris_omnia_mcu_get_function(dev, offset);
- if (ret < 0)
- return ret;
- else if (ret != GPIOF_INPUT)
- return -EOPNOTSUPP;
-
- return 0;
-}
-
-static int turris_omnia_mcu_direction_output(struct udevice *dev, uint offset, int value)
-{
- int ret;
-
- ret = turris_omnia_mcu_get_function(dev, offset);
- if (ret < 0)
- return ret;
- else if (ret != GPIOF_OUTPUT)
- return -EOPNOTSUPP;
-
- return turris_omnia_mcu_set_value(dev, offset, value);
-}
-
-static int turris_omnia_mcu_xlate(struct udevice *dev, struct gpio_desc *desc,
- struct ofnode_phandle_args *args)
-{
- uint bank, gpio, flags, offset;
- int ret;
-
- if (args->args_count != 3)
- return -EINVAL;
-
- bank = args->args[0];
- gpio = args->args[1];
- flags = args->args[2];
-
- switch (bank) {
- case 0:
- if (gpio >= 16)
- return -EINVAL;
- offset = gpio;
- break;
- case 1:
- if (gpio >= 32)
- return -EINVAL;
- offset = 16 + gpio;
- break;
- case 2:
- if (gpio >= 16)
- return -EINVAL;
- offset = 16 + 32 + gpio;
- break;
- default:
- return -EINVAL;
- }
-
- ret = turris_omnia_mcu_get_function(dev, offset);
- if (ret < 0)
- return ret;
-
- desc->offset = offset;
- desc->flags = gpio_flags_xlate(flags);
-
- return 0;
-}
-
-static const struct dm_gpio_ops turris_omnia_mcu_ops = {
- .direction_input = turris_omnia_mcu_direction_input,
- .direction_output = turris_omnia_mcu_direction_output,
- .get_value = turris_omnia_mcu_get_value,
- .set_value = turris_omnia_mcu_set_value,
- .get_function = turris_omnia_mcu_get_function,
- .xlate = turris_omnia_mcu_xlate,
-};
-
-static int turris_omnia_mcu_probe(struct udevice *dev)
-{
- struct turris_omnia_mcu_info *info = dev_get_plat(dev);
- struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
- u16 status;
- u8 val[2];
- int ret;
-
- ret = dm_i2c_read(dev, CMD_GET_STATUS_WORD, val, 2);
- if (ret) {
- printf("Error: turris_omnia_mcu CMD_GET_STATUS_WORD failed: %d\n", ret);
- return ret;
- }
-
- status = ((u16)val[1] << 8) | val[0];
-
- if (status & STS_FEATURES_SUPPORTED) {
- ret = dm_i2c_read(dev, CMD_GET_FEATURES, val, 2);
- if (ret) {
- printf("Error: turris_omnia_mcu CMD_GET_FEATURES failed: %d\n", ret);
- return ret;
- }
- info->features = ((u16)val[1] << 8) | val[0];
- }
-
- uc_priv->bank_name = "mcu_";
-
- if ((info->features & FEAT_EXT_CMDS) && (info->features & FEAT_PERIPH_MCU))
- uc_priv->gpio_count = 16 + 32 + 16;
- else if (info->features & FEAT_EXT_CMDS)
- uc_priv->gpio_count = 16 + 32;
- else
- uc_priv->gpio_count = 16;
-
- return 0;
-}
-
-static const struct udevice_id turris_omnia_mcu_ids[] = {
- { .compatible = "cznic,turris-omnia-mcu" },
- { }
-};
-
-U_BOOT_DRIVER(turris_omnia_mcu) = {
- .name = "turris-omnia-mcu",
- .id = UCLASS_GPIO,
- .ops = &turris_omnia_mcu_ops,
- .probe = turris_omnia_mcu_probe,
- .plat_auto = sizeof(struct turris_omnia_mcu_info),
- .of_match = turris_omnia_mcu_ids,
-};
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-10 14:23:50 +0000