diff options
Diffstat (limited to 'meta-openbmc-mods/meta-ast2600/recipes-kernel/linux/linux-aspeed/0005-Add-sample-i3c-slave-driver.patch')
| -rw-r--r-- | meta-openbmc-mods/meta-ast2600/recipes-kernel/linux/linux-aspeed/0005-Add-sample-i3c-slave-driver.patch | 150 |
1 files changed, 150 insertions, 0 deletions
diff --git a/meta-openbmc-mods/meta-ast2600/recipes-kernel/linux/linux-aspeed/0005-Add-sample-i3c-slave-driver.patch b/meta-openbmc-mods/meta-ast2600/recipes-kernel/linux/linux-aspeed/0005-Add-sample-i3c-slave-driver.patch new file mode 100644 index 000000000..8f548c2e5 --- /dev/null +++ b/meta-openbmc-mods/meta-ast2600/recipes-kernel/linux/linux-aspeed/0005-Add-sample-i3c-slave-driver.patch @@ -0,0 +1,150 @@ +From 4987202965423fafd5c704d4e68a51a4167a4414 Mon Sep 17 00:00:00 2001 +From: Oleksandr Shulzhenko <oleksandr.shulzhenko.viktorovych@intel.com> +Date: Thu, 30 Sep 2021 16:28:26 +0200 +Subject: [PATCH] Add sample i3c slave driver + +The aim of the driver is to debug various i3c solutions implemented +for DesignWare master I3C driver. +The driver is bound to the I3C device that corresponds to I3C slave +emulated by Prodigy with manufacturer ID 0xAC and part ID 0x55AA. +It is enough to fill the I3C_DEVICE macro with the corresponding data +to adjust the driver with another I3C slave device + +Signed-off-by: Oleksandr Shulzhenko <oleksandr.shulzhenko.viktorovych@intel.com> +--- + drivers/i3c/Kconfig | 2 + + drivers/i3c/Makefile | 1 + + drivers/i3c/sample/Kconfig | 7 +++ + drivers/i3c/sample/Makefile | 2 + + drivers/i3c/sample/dw-i3c-sample.c | 75 ++++++++++++++++++++++++++++++ + 5 files changed, 87 insertions(+) + create mode 100644 drivers/i3c/sample/Kconfig + create mode 100644 drivers/i3c/sample/Makefile + create mode 100644 drivers/i3c/sample/dw-i3c-sample.c + +diff --git a/drivers/i3c/Kconfig b/drivers/i3c/Kconfig +index 01642768ab5f..202b0d091631 100644 +--- a/drivers/i3c/Kconfig ++++ b/drivers/i3c/Kconfig +@@ -36,4 +36,6 @@ config I3CDEV + and hence SUBJECT TO CHANGE WITHOUT NOTICE while it stabilizes. + + source "drivers/i3c/master/Kconfig" ++ ++source "drivers/i3c/sample/Kconfig" + endif # I3C +diff --git a/drivers/i3c/Makefile b/drivers/i3c/Makefile +index 606d422841b2..8048a9a793c6 100644 +--- a/drivers/i3c/Makefile ++++ b/drivers/i3c/Makefile +@@ -3,3 +3,4 @@ i3c-y := device.o master.o + obj-$(CONFIG_I3C) += i3c.o + obj-$(CONFIG_I3CDEV) += i3cdev.o + obj-$(CONFIG_I3C) += master/ ++obj-$(CONFIG_I3C) += sample/ +diff --git a/drivers/i3c/sample/Kconfig b/drivers/i3c/sample/Kconfig +new file mode 100644 +index 000000000000..6376c9891795 +--- /dev/null ++++ b/drivers/i3c/sample/Kconfig +@@ -0,0 +1,7 @@ ++# SPDX-License-Identifier: GPL-2.0-only ++config DW_I3C_SAMPLE ++ tristate "Synopsys DesignWare I3C sample driver" ++ depends on I3C ++help ++ Say yes here to enable the driver for DesignWare ++ I3C Sample driver. +diff --git a/drivers/i3c/sample/Makefile b/drivers/i3c/sample/Makefile +new file mode 100644 +index 000000000000..c73bb34fce0e +--- /dev/null ++++ b/drivers/i3c/sample/Makefile +@@ -0,0 +1,2 @@ ++# SPDX-License-Identifier: GPL-2.0-only ++obj-$(CONFIG_DW_I3C_SAMPLE) += dw-i3c-sample.o +\ No newline at end of file +diff --git a/drivers/i3c/sample/dw-i3c-sample.c b/drivers/i3c/sample/dw-i3c-sample.c +new file mode 100644 +index 000000000000..1993b9fdb32b +--- /dev/null ++++ b/drivers/i3c/sample/dw-i3c-sample.c +@@ -0,0 +1,75 @@ ++// SPDX-License-Identifier: GPL-2.0 ++/* Copyright (C) 2021 Intel Corporation.*/ ++ ++#include <linux/i3c/device.h> ++#include <linux/module.h> ++ ++#define IBI_QUEUE_STATUS_IBI_ID(x) (((x) & GENMASK(15, 8)) >> 8) ++#define IBI_QUEUE_IBI_ADDR(x) (IBI_QUEUE_STATUS_IBI_ID(x) >> 1) ++#define IBI_QUEUE_STATUS_DATA_LEN(x) ((x) & GENMASK(7, 0)) ++ ++static void ibi_handler(struct i3c_device *dev, ++ const struct i3c_ibi_payload *payload) ++{ ++ unsigned int i = 0; ++ u32 ibi_status; ++ u8 addr; ++ const u8 *buf; ++ ++ dev_info(i3cdev_to_dev(dev), "%s:%d\n", __func__, __LINE__); ++ if (payload) { ++ ibi_status = *((u32 *)payload->data); ++ addr = IBI_QUEUE_IBI_ADDR(ibi_status); ++ dev_info(i3cdev_to_dev(dev), "%s, dynamic address = 0x%02x\n", ++ __func__, addr); ++ /* We need to read only IBI Paylod data - so shift for IBI_QUEUE_STATUS ++ * length which is 32 bits ++ */ ++ buf = payload->data + sizeof(u32); ++ for (i = 0; i < IBI_QUEUE_STATUS_DATA_LEN(ibi_status); i++) ++ dev_info(i3cdev_to_dev(dev), "%s payload[%d] = 0x%02x\n", ++ __func__, i, *(buf + sizeof(u8) * i)); ++ } ++} ++ ++static int dw_i3c_sample_probe(struct i3c_device *i3cdev) ++{ ++ int ret; ++ struct i3c_ibi_setup ibireq = { ++ .handler = ibi_handler, ++ .max_payload_len = 2, ++ .num_slots = 10, ++ }; ++ ++ ret = i3c_device_request_ibi(i3cdev, &ibireq); ++ if (ret) ++ return ret; ++ ret = i3c_device_enable_ibi(i3cdev); ++ if (ret) ++ i3c_device_free_ibi(i3cdev); ++ ++ return ret; ++} ++ ++static void dw_i3c_sample_remove(struct i3c_device *i3cdev) ++{ ++ i3c_device_disable_ibi(i3cdev); ++ i3c_device_free_ibi(i3cdev); ++} ++ ++static const struct i3c_device_id dw_i3c_sample_ids[] = { ++ I3C_DEVICE(0x2AC /*manufid*/, 0x55AA /*partid*/, NULL /*driver-data*/), ++ { /* sentinel */ }, ++}; ++ ++static struct i3c_driver dw_i3c_sample = { ++ .driver.name = "dw-i3c-sample", ++ .id_table = dw_i3c_sample_ids, ++ .probe = dw_i3c_sample_probe, ++ .remove = dw_i3c_sample_remove, ++}; ++ ++module_i3c_driver(dw_i3c_sample); ++MODULE_AUTHOR("Oleksandr Shulzhenko <oleksandr.shulzhenko.viktorovych@intel.com>"); ++MODULE_DESCRIPTION("DesignWare I3C sample driver"); ++MODULE_LICENSE("GPL"); +-- +2.25.1 + |