openwrt/target/linux/bcm27xx/patches-6.6/950-0535-i2c-designware-Add-SMBUS-quick-command-support.patch

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From 371cb1f31574fd9d6a706986c3971588a761a9c9 Mon Sep 17 00:00:00 2001
From: Phil Elwell <phil@raspberrypi.com>
Date: Fri, 4 Dec 2020 15:20:36 +0000
Subject: [PATCH 0535/1085] i2c: designware: Add SMBUS quick command support
The SMBUS emulation code turns an SMBUS quick command into a zero-
length read. This controller can't do zero length accesses, but it
can do quick commands, so reverse the emulation. The alternative
would be to properly implement the SMBUS support but that is a lot
more work, and unnecessary just to get i2cdetect working.
Signed-off-by: Phil Elwell <phil@raspberrypi.com>
---
drivers/i2c/busses/i2c-designware-core.h | 2 ++
drivers/i2c/busses/i2c-designware-master.c | 17 +++++++++++++++--
2 files changed, 17 insertions(+), 2 deletions(-)
--- a/drivers/i2c/busses/i2c-designware-core.h
+++ b/drivers/i2c/busses/i2c-designware-core.h
kernel: bump 6.6 to 6.6.55 Changelog: https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.6.55 Added the following default ksym to target/linux/generic/config-6.6: CONFIG_PROC_MEM_ALWAYS_FORCE=y # CONFIG_PROC_MEM_FORCE_PTRACE is not set # CONFIG_PROC_MEM_NO_FORCE is not set Removed upstreamed: generic/backport-6.6/780-23-v6.12-r8169-Fix-spelling-mistake-tx_underun-tx_underrun.patch[1] generic/backport-6.6/780-25-v6.12-r8169-add-tally-counter-fields-added-with-RTL8125.patch[2] generic/pending-6.6/684-gso-fix-gso-fraglist-segmentation-after-pull-from-fr.patch[3] lantiq/patches-6.6/0025-v6.12-net-ethernet-lantiq_etop-fix-memory-disclosure.patch[4] Manually rebased: bcm27xx/patches-6.6/950-0086-Main-bcm2708-bcm2709-linux-port.patch bcm27xx/patches-6.6/950-0998-i2c-designware-Add-support-for-bus-clear-feature.patch All other patches automatically rebased. 1. https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v6.6.56&id=f02fcb7283b1c25f7e3ae07d7a2c830e06eb1a62 2. https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v6.6.56&id=1c723d785adb711496bc64c24240f952f4faaabf 3. https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v6.6.56&id=af3122f5fdc0d00581d6e598a668df6bf54c9daa 4. https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v6.6.56&id=e66e38d07b31e177ca430758ed97fbc79f27d966 Build system: x86/64 Build-tested: x86/64/AMD Cezanne, flogic/xiaomi_redmi-router-ax6000-ubootmod, ramips/tplink_archer-a6-v3 Run-tested: x86/64/AMD Cezanne, flogic/xiaomi_redmi-router-ax6000-ubootmod, ramips/tplink_archer-a6-v3 Signed-off-by: John Audia <therealgraysky@proton.me> Link: https://github.com/openwrt/openwrt/pull/16655 Signed-off-by: Nick Hainke <vincent@systemli.org>
2024-10-10 20:06:27 +00:00
@@ -123,7 +123,9 @@
#define DW_IC_ERR_TX_ABRT 0x1
+#define DW_IC_TAR_SPECIAL BIT(11)
#define DW_IC_TAR_10BITADDR_MASTER BIT(12)
+#define DW_IC_TAR_SMBUS_QUICK_CMD BIT(16)
#define DW_IC_COMP_PARAM_1_SPEED_MODE_HIGH (BIT(2) | BIT(3))
#define DW_IC_COMP_PARAM_1_SPEED_MODE_MASK GENMASK(3, 2)
--- a/drivers/i2c/busses/i2c-designware-master.c
+++ b/drivers/i2c/busses/i2c-designware-master.c
@@ -229,6 +229,10 @@ static void i2c_dw_xfer_init(struct dw_i
ic_tar = DW_IC_TAR_10BITADDR_MASTER;
}
+ /* Convert a zero-length read into an SMBUS quick command */
+ if (!msgs[dev->msg_write_idx].len)
+ ic_tar = DW_IC_TAR_SPECIAL | DW_IC_TAR_SMBUS_QUICK_CMD;
+
regmap_update_bits(dev->map, DW_IC_CON, DW_IC_CON_10BITADDR_MASTER,
ic_con);
kernel: bump 6.6 to 6.6.55 Changelog: https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.6.55 Added the following default ksym to target/linux/generic/config-6.6: CONFIG_PROC_MEM_ALWAYS_FORCE=y # CONFIG_PROC_MEM_FORCE_PTRACE is not set # CONFIG_PROC_MEM_NO_FORCE is not set Removed upstreamed: generic/backport-6.6/780-23-v6.12-r8169-Fix-spelling-mistake-tx_underun-tx_underrun.patch[1] generic/backport-6.6/780-25-v6.12-r8169-add-tally-counter-fields-added-with-RTL8125.patch[2] generic/pending-6.6/684-gso-fix-gso-fraglist-segmentation-after-pull-from-fr.patch[3] lantiq/patches-6.6/0025-v6.12-net-ethernet-lantiq_etop-fix-memory-disclosure.patch[4] Manually rebased: bcm27xx/patches-6.6/950-0086-Main-bcm2708-bcm2709-linux-port.patch bcm27xx/patches-6.6/950-0998-i2c-designware-Add-support-for-bus-clear-feature.patch All other patches automatically rebased. 1. https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v6.6.56&id=f02fcb7283b1c25f7e3ae07d7a2c830e06eb1a62 2. https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v6.6.56&id=1c723d785adb711496bc64c24240f952f4faaabf 3. https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v6.6.56&id=af3122f5fdc0d00581d6e598a668df6bf54c9daa 4. https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v6.6.56&id=e66e38d07b31e177ca430758ed97fbc79f27d966 Build system: x86/64 Build-tested: x86/64/AMD Cezanne, flogic/xiaomi_redmi-router-ax6000-ubootmod, ramips/tplink_archer-a6-v3 Run-tested: x86/64/AMD Cezanne, flogic/xiaomi_redmi-router-ax6000-ubootmod, ramips/tplink_archer-a6-v3 Signed-off-by: John Audia <therealgraysky@proton.me> Link: https://github.com/openwrt/openwrt/pull/16655 Signed-off-by: Nick Hainke <vincent@systemli.org>
2024-10-10 20:06:27 +00:00
@@ -500,6 +504,14 @@ i2c_dw_xfer_msg(struct dw_i2c_dev *dev)
regmap_read(dev->map, DW_IC_RXFLR, &flr);
rx_limit = dev->rx_fifo_depth - flr;
+ /* Handle SMBUS quick commands */
+ if (!buf_len) {
+ if (msgs[dev->msg_write_idx].flags & I2C_M_RD)
+ regmap_write(dev->map, DW_IC_DATA_CMD, 0x300);
+ else
+ regmap_write(dev->map, DW_IC_DATA_CMD, 0x200);
+ }
+
while (buf_len > 0 && tx_limit > 0 && rx_limit > 0) {
u32 cmd = 0;
kernel: bump 6.6 to 6.6.55 Changelog: https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.6.55 Added the following default ksym to target/linux/generic/config-6.6: CONFIG_PROC_MEM_ALWAYS_FORCE=y # CONFIG_PROC_MEM_FORCE_PTRACE is not set # CONFIG_PROC_MEM_NO_FORCE is not set Removed upstreamed: generic/backport-6.6/780-23-v6.12-r8169-Fix-spelling-mistake-tx_underun-tx_underrun.patch[1] generic/backport-6.6/780-25-v6.12-r8169-add-tally-counter-fields-added-with-RTL8125.patch[2] generic/pending-6.6/684-gso-fix-gso-fraglist-segmentation-after-pull-from-fr.patch[3] lantiq/patches-6.6/0025-v6.12-net-ethernet-lantiq_etop-fix-memory-disclosure.patch[4] Manually rebased: bcm27xx/patches-6.6/950-0086-Main-bcm2708-bcm2709-linux-port.patch bcm27xx/patches-6.6/950-0998-i2c-designware-Add-support-for-bus-clear-feature.patch All other patches automatically rebased. 1. https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v6.6.56&id=f02fcb7283b1c25f7e3ae07d7a2c830e06eb1a62 2. https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v6.6.56&id=1c723d785adb711496bc64c24240f952f4faaabf 3. https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v6.6.56&id=af3122f5fdc0d00581d6e598a668df6bf54c9daa 4. https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v6.6.56&id=e66e38d07b31e177ca430758ed97fbc79f27d966 Build system: x86/64 Build-tested: x86/64/AMD Cezanne, flogic/xiaomi_redmi-router-ax6000-ubootmod, ramips/tplink_archer-a6-v3 Run-tested: x86/64/AMD Cezanne, flogic/xiaomi_redmi-router-ax6000-ubootmod, ramips/tplink_archer-a6-v3 Signed-off-by: John Audia <therealgraysky@proton.me> Link: https://github.com/openwrt/openwrt/pull/16655 Signed-off-by: Nick Hainke <vincent@systemli.org>
2024-10-10 20:06:27 +00:00
@@ -781,7 +793,7 @@ static const struct i2c_algorithm i2c_dw
};
static const struct i2c_adapter_quirks i2c_dw_quirks = {
- .flags = I2C_AQ_NO_ZERO_LEN,
+ .flags = 0,
};
static u32 i2c_dw_read_clear_intrbits(struct dw_i2c_dev *dev)
kernel: bump 6.6 to 6.6.55 Changelog: https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.6.55 Added the following default ksym to target/linux/generic/config-6.6: CONFIG_PROC_MEM_ALWAYS_FORCE=y # CONFIG_PROC_MEM_FORCE_PTRACE is not set # CONFIG_PROC_MEM_NO_FORCE is not set Removed upstreamed: generic/backport-6.6/780-23-v6.12-r8169-Fix-spelling-mistake-tx_underun-tx_underrun.patch[1] generic/backport-6.6/780-25-v6.12-r8169-add-tally-counter-fields-added-with-RTL8125.patch[2] generic/pending-6.6/684-gso-fix-gso-fraglist-segmentation-after-pull-from-fr.patch[3] lantiq/patches-6.6/0025-v6.12-net-ethernet-lantiq_etop-fix-memory-disclosure.patch[4] Manually rebased: bcm27xx/patches-6.6/950-0086-Main-bcm2708-bcm2709-linux-port.patch bcm27xx/patches-6.6/950-0998-i2c-designware-Add-support-for-bus-clear-feature.patch All other patches automatically rebased. 1. https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v6.6.56&id=f02fcb7283b1c25f7e3ae07d7a2c830e06eb1a62 2. https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v6.6.56&id=1c723d785adb711496bc64c24240f952f4faaabf 3. https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v6.6.56&id=af3122f5fdc0d00581d6e598a668df6bf54c9daa 4. https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v6.6.56&id=e66e38d07b31e177ca430758ed97fbc79f27d966 Build system: x86/64 Build-tested: x86/64/AMD Cezanne, flogic/xiaomi_redmi-router-ax6000-ubootmod, ramips/tplink_archer-a6-v3 Run-tested: x86/64/AMD Cezanne, flogic/xiaomi_redmi-router-ax6000-ubootmod, ramips/tplink_archer-a6-v3 Signed-off-by: John Audia <therealgraysky@proton.me> Link: https://github.com/openwrt/openwrt/pull/16655 Signed-off-by: Nick Hainke <vincent@systemli.org>
2024-10-10 20:06:27 +00:00
@@ -914,7 +926,8 @@ void i2c_dw_configure_master(struct dw_i
{
struct i2c_timings *t = &dev->timings;
- dev->functionality = I2C_FUNC_10BIT_ADDR | DW_IC_DEFAULT_FUNCTIONALITY;
+ dev->functionality = I2C_FUNC_10BIT_ADDR | I2C_FUNC_SMBUS_QUICK |
+ DW_IC_DEFAULT_FUNCTIONALITY;
dev->master_cfg = DW_IC_CON_MASTER | DW_IC_CON_SLAVE_DISABLE |
DW_IC_CON_RESTART_EN;