Date: Thu, 16 Feb 2023 11:56:24 GMT From: =?utf-8?Q?Jean-S=C3=A9bastien=20P=C3=A9dron?= <dumbbell@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org Subject: git: 43f2fdb20510 - stable/13 - linuxkpi: Add `i2c_adapter_quirks` support Message-ID: <202302161156.31GBuOpq056114@gitrepo.freebsd.org>
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The branch stable/13 has been updated by dumbbell (ports committer): URL: https://cgit.FreeBSD.org/src/commit/?id=43f2fdb205104dae32326d074367aa0eb251f8ec commit 43f2fdb205104dae32326d074367aa0eb251f8ec Author: Jean-Sébastien Pédron <dumbbell@FreeBSD.org> AuthorDate: 2023-02-08 17:57:32 +0000 Commit: Jean-Sébastien Pédron <dumbbell@FreeBSD.org> CommitDate: 2023-02-16 11:55:19 +0000 linuxkpi: Add `i2c_adapter_quirks` support While here, also declare `I2C_CLASS_HWMON`. Reviewed by: manu Approved by: manu Differential Revision: https://reviews.freebsd.org/D38535 (cherry picked from commit 83276e1f952d720c23092ea17e95c03fef8476b7) --- sys/compat/linuxkpi/common/include/linux/i2c.h | 25 ++++++ sys/compat/linuxkpi/common/src/linux_i2c.c | 113 +++++++++++++++++++++++++ 2 files changed, 138 insertions(+) diff --git a/sys/compat/linuxkpi/common/include/linux/i2c.h b/sys/compat/linuxkpi/common/include/linux/i2c.h index 365ab893fdfd..f24d282586f6 100644 --- a/sys/compat/linuxkpi/common/include/linux/i2c.h +++ b/sys/compat/linuxkpi/common/include/linux/i2c.h @@ -46,6 +46,7 @@ #define I2C_FUNC_SMBUS_BLOCK_PROC_CALL 0 #define I2C_FUNC_10BIT_ADDR 0 +#define I2C_CLASS_HWMON 0x1 #define I2C_CLASS_DDC 0x8 #define I2C_CLASS_SPD 0x80 @@ -58,6 +59,7 @@ struct i2c_adapter { const struct i2c_lock_operations *lock_ops; const struct i2c_algorithm *algo; + const struct i2c_adapter_quirks *quirks; void *algo_data; int retries; @@ -82,6 +84,29 @@ struct i2c_lock_operations { void (*unlock_bus)(struct i2c_adapter *, unsigned int); }; +struct i2c_adapter_quirks { + uint64_t flags; + int max_num_msgs; + uint16_t max_write_len; + uint16_t max_read_len; + uint16_t max_comb_1st_msg_len; + uint16_t max_comb_2nd_msg_len; +}; + +#define I2C_AQ_COMB BIT(0) +#define I2C_AQ_COMB_WRITE_FIRST BIT(1) +#define I2C_AQ_COMB_READ_SECOND BIT(2) +#define I2C_AQ_COMB_SAME_ADDR BIT(3) +#define I2C_AQ_COMB_WRITE_THEN_READ \ + (I2C_AQ_COMB | I2C_AQ_COMB_WRITE_FIRST | \ + I2C_AQ_COMB_READ_SECOND | I2C_AQ_COMB_SAME_ADDR) +#define I2C_AQ_NO_CLK_STRETCH BIT(4) +#define I2C_AQ_NO_ZERO_LEN_READ BIT(5) +#define I2C_AQ_NO_ZERO_LEN_WRITE BIT(6) +#define I2C_AQ_NO_ZERO_LEN \ + (I2C_AQ_NO_ZERO_LEN_READ | I2C_AQ_NO_ZERO_LEN_WRITE) +#define I2C_AQ_NO_REP_START BIT(7) + int lkpi_i2c_add_adapter(struct i2c_adapter *adapter); int lkpi_i2c_del_adapter(struct i2c_adapter *adapter); diff --git a/sys/compat/linuxkpi/common/src/linux_i2c.c b/sys/compat/linuxkpi/common/src/linux_i2c.c index a94ed630ab73..c01c88a1fafa 100644 --- a/sys/compat/linuxkpi/common/src/linux_i2c.c +++ b/sys/compat/linuxkpi/common/src/linux_i2c.c @@ -169,6 +169,116 @@ lkpi_i2c_reset(device_t dev, u_char speed, u_char addr, u_char *oldaddr) return (0); } +static int i2c_check_for_quirks(struct i2c_adapter *adapter, + struct iic_msg *msgs, uint32_t nmsgs) +{ + const struct i2c_adapter_quirks *quirks; + device_t dev; + int i, max_nmsgs; + bool check_len; + + dev = adapter->dev.parent->bsddev; + quirks = adapter->quirks; + if (quirks == NULL) + return (0); + + check_len = true; + max_nmsgs = quirks->max_num_msgs; + + if (quirks->flags & I2C_AQ_COMB) { + max_nmsgs = 2; + + if (nmsgs == 2) { + if (quirks->flags & I2C_AQ_COMB_WRITE_FIRST && + msgs[0].flags & IIC_M_RD) { + device_printf(dev, + "Error: " + "first combined message must be write\n"); + return (EOPNOTSUPP); + } + if (quirks->flags & I2C_AQ_COMB_READ_SECOND && + !(msgs[1].flags & IIC_M_RD)) { + device_printf(dev, + "Error: " + "second combined message must be read\n"); + return (EOPNOTSUPP); + } + + if (quirks->flags & I2C_AQ_COMB_SAME_ADDR && + msgs[0].slave != msgs[1].slave) { + device_printf(dev, + "Error: " + "combined message must be use the same " + "address\n"); + return (EOPNOTSUPP); + } + + if (quirks->max_comb_1st_msg_len && + msgs[0].len > quirks->max_comb_1st_msg_len) { + device_printf(dev, + "Error: " + "message too long: %hu > %hu max\n", + msgs[0].len, + quirks->max_comb_1st_msg_len); + return (EOPNOTSUPP); + } + if (quirks->max_comb_2nd_msg_len && + msgs[1].len > quirks->max_comb_2nd_msg_len) { + device_printf(dev, + "Error: " + "message too long: %hu > %hu max\n", + msgs[1].len, + quirks->max_comb_2nd_msg_len); + return (EOPNOTSUPP); + } + + check_len = false; + } + } + + if (max_nmsgs && nmsgs > max_nmsgs) { + device_printf(dev, + "Error: too many messages: %d > %d max\n", + nmsgs, max_nmsgs); + return (EOPNOTSUPP); + } + + for (i = 0; i < nmsgs; i++) { + if (msgs[i].flags & IIC_M_RD) { + if (check_len && quirks->max_read_len && + msgs[i].len > quirks->max_read_len) { + device_printf(dev, + "Error: " + "message %d too long: %hu > %hu max\n", + i, msgs[i].len, quirks->max_read_len); + return (EOPNOTSUPP); + } + if (quirks->flags & I2C_AQ_NO_ZERO_LEN_READ && + msgs[i].len == 0) { + device_printf(dev, + "Error: message %d of length 0\n", i); + return (EOPNOTSUPP); + } + } else { + if (check_len && quirks->max_write_len && + msgs[i].len > quirks->max_write_len) { + device_printf(dev, + "Message %d too long: %hu > %hu max\n", + i, msgs[i].len, quirks->max_write_len); + return (EOPNOTSUPP); + } + if (quirks->flags & I2C_AQ_NO_ZERO_LEN_WRITE && + msgs[i].len == 0) { + device_printf(dev, + "Error: message %d of length 0\n", i); + return (EOPNOTSUPP); + } + } + } + + return (0); +} + static int lkpi_i2c_transfer(device_t dev, struct iic_msg *msgs, uint32_t nmsgs) { @@ -179,6 +289,9 @@ lkpi_i2c_transfer(device_t dev, struct iic_msg *msgs, uint32_t nmsgs) sc = device_get_softc(dev); if (sc->adapter == NULL) return (ENXIO); + ret = i2c_check_for_quirks(sc->adapter, msgs, nmsgs); + if (ret != 0) + return (ret); linux_set_current(curthread); linux_msgs = malloc(sizeof(struct i2c_msg) * nmsgs,
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