* [Intel-wired-lan] [PATCH v2 intel-next 2/3] ice: add i2c write command
2022-04-22 11:42 [Intel-wired-lan] [PATCH v2 intel-next 1/3] ice: remove u16 arithmetic in ice_gnss Karol Kolacinski
@ 2022-04-22 11:42 ` Karol Kolacinski
2022-04-22 11:42 ` [Intel-wired-lan] [PATCH v2 intel-next 3/3] ice: add write functionality for GNSS TTY Karol Kolacinski
2022-04-22 16:43 ` [Intel-wired-lan] [PATCH v2 intel-next 1/3] ice: remove u16 arithmetic in ice_gnss Tony Nguyen
2 siblings, 0 replies; 5+ messages in thread
From: Karol Kolacinski @ 2022-04-22 11:42 UTC (permalink / raw)
To: intel-wired-lan
Add the possibility to write to connected i2c devices using the AQ
command. FW may reject the write if the device is not on allowlist.
Signed-off-by: Karol Kolacinski <karol.kolacinski@intel.com>
---
.../net/ethernet/intel/ice/ice_adminq_cmd.h | 7 +--
drivers/net/ethernet/intel/ice/ice_common.c | 51 ++++++++++++++++++-
drivers/net/ethernet/intel/ice/ice_common.h | 4 ++
3 files changed, 58 insertions(+), 4 deletions(-)
diff --git a/drivers/net/ethernet/intel/ice/ice_adminq_cmd.h b/drivers/net/ethernet/intel/ice/ice_adminq_cmd.h
index b25e27c4d887..bedc19f12cbd 100644
--- a/drivers/net/ethernet/intel/ice/ice_adminq_cmd.h
+++ b/drivers/net/ethernet/intel/ice/ice_adminq_cmd.h
@@ -1401,7 +1401,7 @@ struct ice_aqc_get_link_topo {
u8 rsvd[9];
};
-/* Read I2C (direct, 0x06E2) */
+/* Read/Write I2C (direct, 0x06E2/0x06E3) */
struct ice_aqc_i2c {
struct ice_aqc_link_topo_addr topo_addr;
__le16 i2c_addr;
@@ -1411,7 +1411,7 @@ struct ice_aqc_i2c {
u8 rsvd;
__le16 i2c_bus_addr;
- u8 rsvd2[4];
+ u8 i2c_data[4]; /* Used only by write command, reserved in read. */
};
/* Read I2C Response (direct, 0x06E2) */
@@ -2130,7 +2130,7 @@ struct ice_aq_desc {
struct ice_aqc_get_link_status get_link_status;
struct ice_aqc_event_lan_overflow lan_overflow;
struct ice_aqc_get_link_topo get_link_topo;
- struct ice_aqc_i2c read_i2c;
+ struct ice_aqc_i2c read_write_i2c;
struct ice_aqc_read_i2c_resp read_i2c_resp;
} params;
};
@@ -2247,6 +2247,7 @@ enum ice_adminq_opc {
ice_aqc_opc_set_mac_lb = 0x0620,
ice_aqc_opc_get_link_topo = 0x06E0,
ice_aqc_opc_read_i2c = 0x06E2,
+ ice_aqc_opc_write_i2c = 0x06E3,
ice_aqc_opc_set_port_id_led = 0x06E9,
ice_aqc_opc_set_gpio = 0x06EC,
ice_aqc_opc_get_gpio = 0x06ED,
diff --git a/drivers/net/ethernet/intel/ice/ice_common.c b/drivers/net/ethernet/intel/ice/ice_common.c
index 9619bdb9e49a..1999c19a786e 100644
--- a/drivers/net/ethernet/intel/ice/ice_common.c
+++ b/drivers/net/ethernet/intel/ice/ice_common.c
@@ -4823,7 +4823,7 @@ ice_aq_read_i2c(struct ice_hw *hw, struct ice_aqc_link_topo_addr topo_addr,
int status;
ice_fill_dflt_direct_cmd_desc(&desc, ice_aqc_opc_read_i2c);
- cmd = &desc.params.read_i2c;
+ cmd = &desc.params.read_write_i2c;
if (!data)
return -EINVAL;
@@ -4850,6 +4850,55 @@ ice_aq_read_i2c(struct ice_hw *hw, struct ice_aqc_link_topo_addr topo_addr,
return status;
}
+/**
+ * ice_aq_write_i2c
+ * @hw: pointer to the hw struct
+ * @topo_addr: topology address for a device to communicate with
+ * @bus_addr: 7-bit I2C bus address
+ * @addr: I2C memory address (I2C offset) with up to 16 bits
+ * @params: I2C parameters: bit [4] - I2C address type, bits [3:0] - data size to write (0-7 bytes)
+ * @data: pointer to data (0 to 4 bytes) to be written to the I2C device
+ * @cd: pointer to command details structure or NULL
+ *
+ * Write I2C (0x06E3)
+ *
+ * * Return:
+ * * 0 - Successful write to the i2c device
+ * * -EINVAL - Data size greater than 4 bytes
+ * * -EIO - FW error
+ */
+int
+ice_aq_write_i2c(struct ice_hw *hw, struct ice_aqc_link_topo_addr topo_addr,
+ u16 bus_addr, __le16 addr, u8 params, u8 *data,
+ struct ice_sq_cd *cd)
+{
+ struct ice_aq_desc desc = { 0 };
+ struct ice_aqc_i2c *cmd;
+ unsigned int i;
+ u8 data_size;
+
+ ice_fill_dflt_direct_cmd_desc(&desc, ice_aqc_opc_write_i2c);
+ cmd = &desc.params.read_write_i2c;
+
+ data_size = FIELD_GET(ICE_AQC_I2C_DATA_SIZE_M, params);
+
+ /* data_size limited to 4 */
+ if (data_size > 4)
+ return -EINVAL;
+
+ cmd->i2c_bus_addr = cpu_to_le16(bus_addr);
+ cmd->topo_addr = topo_addr;
+ cmd->i2c_params = params;
+ cmd->i2c_addr = addr;
+
+ for (i = 0; i < data_size; i++) {
+ cmd->i2c_data[i] = *data;
+ data++;
+ }
+
+ return ice_aq_send_cmd(hw, &desc, NULL, 0, cd);
+}
+
/**
* ice_aq_set_driver_param - Set driver parameter to share via firmware
* @hw: pointer to the HW struct
diff --git a/drivers/net/ethernet/intel/ice/ice_common.h b/drivers/net/ethernet/intel/ice/ice_common.h
index 872ea7d2332d..61b7c60db689 100644
--- a/drivers/net/ethernet/intel/ice/ice_common.h
+++ b/drivers/net/ethernet/intel/ice/ice_common.h
@@ -214,5 +214,9 @@ int
ice_aq_read_i2c(struct ice_hw *hw, struct ice_aqc_link_topo_addr topo_addr,
u16 bus_addr, __le16 addr, u8 params, u8 *data,
struct ice_sq_cd *cd);
+int
+ice_aq_write_i2c(struct ice_hw *hw, struct ice_aqc_link_topo_addr topo_addr,
+ u16 bus_addr, __le16 addr, u8 params, u8 *data,
+ struct ice_sq_cd *cd);
bool ice_fw_supports_report_dflt_cfg(struct ice_hw *hw);
#endif /* _ICE_COMMON_H_ */
--
2.34.1
^ permalink raw reply related [flat|nested] 5+ messages in thread* [Intel-wired-lan] [PATCH v2 intel-next 3/3] ice: add write functionality for GNSS TTY
2022-04-22 11:42 [Intel-wired-lan] [PATCH v2 intel-next 1/3] ice: remove u16 arithmetic in ice_gnss Karol Kolacinski
2022-04-22 11:42 ` [Intel-wired-lan] [PATCH v2 intel-next 2/3] ice: add i2c write command Karol Kolacinski
@ 2022-04-22 11:42 ` Karol Kolacinski
2022-04-22 16:46 ` Tony Nguyen
2022-04-22 16:43 ` [Intel-wired-lan] [PATCH v2 intel-next 1/3] ice: remove u16 arithmetic in ice_gnss Tony Nguyen
2 siblings, 1 reply; 5+ messages in thread
From: Karol Kolacinski @ 2022-04-22 11:42 UTC (permalink / raw)
To: intel-wired-lan
Add the possibility to write raw bytes to the GNSS module through the
first TTY device. This allows user to configure the module using the
publicli available u-blox UBX protocol (version 29) commands.
Create a second read-only TTY device.
Signed-off-by: Karol Kolacinski <karol.kolacinski@intel.com>
---
drivers/net/ethernet/intel/ice/ice.h | 4 +-
drivers/net/ethernet/intel/ice/ice_gnss.c | 249 +++++++++++++++++++---
drivers/net/ethernet/intel/ice/ice_gnss.h | 25 ++-
3 files changed, 243 insertions(+), 35 deletions(-)
diff --git a/drivers/net/ethernet/intel/ice/ice.h b/drivers/net/ethernet/intel/ice/ice.h
index 17fb1ddea7b0..41bd0c7c7da5 100644
--- a/drivers/net/ethernet/intel/ice/ice.h
+++ b/drivers/net/ethernet/intel/ice/ice.h
@@ -558,8 +558,8 @@ struct ice_pf {
u32 msg_enable;
struct ice_ptp ptp;
struct tty_driver *ice_gnss_tty_driver;
- struct tty_port gnss_tty_port;
- struct gnss_serial *gnss_serial;
+ struct tty_port *gnss_tty_port[ICE_GNSS_TTY_MINOR_DEVICES];
+ struct gnss_serial *gnss_serial[ICE_GNSS_TTY_MINOR_DEVICES];
u16 num_rdma_msix; /* Total MSIX vectors for RDMA driver */
u16 rdma_base_vector;
diff --git a/drivers/net/ethernet/intel/ice/ice_gnss.c b/drivers/net/ethernet/intel/ice/ice_gnss.c
index 8a7d67c12ff7..a4a89dbc0687 100644
--- a/drivers/net/ethernet/intel/ice/ice_gnss.c
+++ b/drivers/net/ethernet/intel/ice/ice_gnss.c
@@ -1,10 +1,102 @@
// SPDX-License-Identifier: GPL-2.0
-/* Copyright (C) 2018-2021, Intel Corporation. */
+/* Copyright (C) 2021-2022, Intel Corporation. */
#include "ice.h"
#include "ice_lib.h"
#include <linux/tty_driver.h>
+/**
+ * ice_gnss_do_write - Write data to internal GNSS
+ * @pf: board private structure
+ * @buf: command buffer
+ * @size: command buffer size
+ *
+ * Write UBX command data to the GNSS receiver
+ */
+static unsigned int
+ice_gnss_do_write(struct ice_pf *pf, unsigned char *buf, unsigned int size)
+{
+ struct ice_aqc_link_topo_addr link_topo;
+ struct ice_hw *hw = &pf->hw;
+ unsigned int offset = 0;
+ int err = 0;
+
+ memset(&link_topo, 0, sizeof(struct ice_aqc_link_topo_addr));
+ link_topo.topo_params.index = ICE_E810T_GNSS_I2C_BUS;
+ link_topo.topo_params.node_type_ctx |=
+ ICE_AQC_LINK_TOPO_NODE_CTX_OVERRIDE <<
+ ICE_AQC_LINK_TOPO_NODE_CTX_S;
+
+ /* It's not possible to write a single byte to u-blox.
+ * Write all bytes in a loop until there are 6 or less bytes left. If
+ * there are exactly 6 bytes left, the last write would be only a byte.
+ * In this case, do 4+2 bytes writes instead of 5+1. Otherwise, do the
+ * last 2 to 5 bytes write.
+ */
+ while (size - offset > ICE_GNSS_UBX_WRITE_BYTES + 1) {
+ err = ice_aq_write_i2c(hw, link_topo, ICE_GNSS_UBX_I2C_BUS_ADDR,
+ cpu_to_le16(buf[offset]),
+ ICE_MAX_I2C_WRITE_BYTES,
+ &buf[offset + 1], NULL);
+ if (err)
+ goto exit;
+
+ offset += ICE_GNSS_UBX_WRITE_BYTES;
+ }
+
+ /* Single byte would be written. Write 4 bytes instead of 5. */
+ if (size - offset == ICE_GNSS_UBX_WRITE_BYTES + 1) {
+ err = ice_aq_write_i2c(hw, link_topo, ICE_GNSS_UBX_I2C_BUS_ADDR,
+ cpu_to_le16(buf[offset]),
+ ICE_MAX_I2C_WRITE_BYTES - 1,
+ &buf[offset + 1], NULL);
+ if (err)
+ goto exit;
+
+ offset += ICE_GNSS_UBX_WRITE_BYTES - 1;
+ }
+
+ /* Do the last write, 2 to 5 bytes. */
+ err = ice_aq_write_i2c(hw, link_topo, ICE_GNSS_UBX_I2C_BUS_ADDR,
+ cpu_to_le16(buf[offset]), size - offset - 1,
+ &buf[offset + 1], NULL);
+ if (!err)
+ offset = size;
+
+exit:
+ if (err)
+ dev_err(ice_pf_to_dev(pf), "GNSS failed to write, offset=%u, size=%u, err=%d\n",
+ offset, size, err);
+
+ return offset;
+}
+
+/**
+ * ice_gnss_write_pending - Write all pending data to internal GNSS
+ * @work: GNSS write work structure
+ */
+static void ice_gnss_write_pending(struct kthread_work *work)
+{
+ struct gnss_serial *gnss = container_of(work, struct gnss_serial,
+ write_work);
+ struct ice_pf *pf = gnss->back;
+
+ if (!list_empty(&gnss->queue)) {
+ struct gnss_write_buf *write_buf = NULL;
+ unsigned int bytes;
+
+ write_buf = list_first_entry(&gnss->queue,
+ struct gnss_write_buf, queue);
+
+ bytes = ice_gnss_do_write(pf, write_buf->buf, write_buf->size);
+ dev_dbg(ice_pf_to_dev(pf), "%u bytes written to GNSS\n", bytes);
+
+ list_del(&write_buf->queue);
+ kfree(write_buf->buf);
+ kfree(write_buf);
+ }
+}
+
/**
* ice_gnss_read - Read data from internal GNSS module
* @work: GNSS read work structure
@@ -17,14 +109,14 @@ static void ice_gnss_read(struct kthread_work *work)
struct gnss_serial *gnss = container_of(work, struct gnss_serial,
read_work.work);
struct ice_aqc_link_topo_addr link_topo;
- u8 i2c_params, bytes_read;
+ unsigned int i, data_len, bytes_read;
struct tty_port *port;
struct ice_pf *pf;
struct ice_hw *hw;
__be16 data_len_b;
char *buf = NULL;
- unsigned int i;
- u32 data_len;
+ u8 i2c_params;
+ int err;
pf = gnss->back;
if (!pf || !gnss->tty || !gnss->tty->port) {
@@ -74,7 +166,7 @@ static void ice_gnss_read(struct kthread_work *work)
/* Read received data */
for (i = 0; i < data_len; i += bytes_read) {
- u32 bytes_left = data_len - i;
+ unsigned int bytes_left = data_len - i;
bytes_read = min_t(typeof(bytes_left), bytes_left,
ICE_MAX_I2C_DATA_SIZE);
@@ -104,8 +196,9 @@ static void ice_gnss_read(struct kthread_work *work)
/**
* ice_gnss_struct_init - Initialize GNSS structure for the TTY
* @pf: Board private structure
+ * @index: TTY device index
*/
-static struct gnss_serial *ice_gnss_struct_init(struct ice_pf *pf)
+static struct gnss_serial *ice_gnss_struct_init(struct ice_pf *pf, int index)
{
struct device *dev = ice_pf_to_dev(pf);
struct kthread_worker *kworker;
@@ -118,9 +211,11 @@ static struct gnss_serial *ice_gnss_struct_init(struct ice_pf *pf)
mutex_init(&gnss->gnss_mutex);
gnss->open_count = 0;
gnss->back = pf;
- pf->gnss_serial = gnss;
+ pf->gnss_serial[index] = gnss;
kthread_init_delayed_work(&gnss->read_work, ice_gnss_read);
+ INIT_LIST_HEAD(&gnss->queue);
+ kthread_init_work(&gnss->write_work, ice_gnss_write_pending);
/* Allocate a kworker for handling work required for the GNSS TTY
* writes.
*/
@@ -156,10 +251,10 @@ static int ice_gnss_tty_open(struct tty_struct *tty, struct file *filp)
tty->driver_data = NULL;
/* Get the serial object associated with this tty pointer */
- gnss = pf->gnss_serial;
+ gnss = pf->gnss_serial[tty->index];
if (!gnss) {
/* Initialize GNSS struct on the first device open */
- gnss = ice_gnss_struct_init(pf);
+ gnss = ice_gnss_struct_init(pf, tty->index);
if (!gnss)
return -ENOMEM;
}
@@ -212,25 +307,100 @@ static void ice_gnss_tty_close(struct tty_struct *tty, struct file *filp)
}
/**
- * ice_gnss_tty_write - Dummy TTY write function to avoid kernel panic
+ * ice_gnss_tty_write - Write GNSS data
* @tty: pointer to the tty_struct
* @buf: pointer to the user data
- * @cnt: the number of characters that was able to be sent to the hardware (or
- * queued to be sent at a later time)
+ * @count: the number of characters queued to be sent to the HW
+ *
+ * The write function call is called by the user when there is data to be sent
+ * to the hardware. First the tty core receives the call, and then it passes the
+ * data on to the tty driver?s write function. The tty core also tells the tty
+ * driver the size of the data being sent.
+ * If any errors happen during the write call, a negative error value should be
+ * returned instead of the number of characters queued to be written.
*/
static int
-ice_gnss_tty_write(struct tty_struct *tty, const unsigned char *buf, int cnt)
+ice_gnss_tty_write(struct tty_struct *tty, const unsigned char *buf, int count)
{
- return 0;
+ struct gnss_write_buf *write_buf;
+ struct gnss_serial *gnss;
+ unsigned char *cmd_buf;
+ struct ice_pf *pf;
+ int err = count;
+
+ /* We cannot write a single byte using our I2C implementation. */
+ if (count <= 1 || count > ICE_GNSS_TTY_WRITE_BUF)
+ return -EINVAL;
+
+ gnss = tty->driver_data;
+ if (!gnss)
+ return -EFAULT;
+
+ pf = (struct ice_pf *)tty->driver->driver_state;
+ if (!pf)
+ return -EFAULT;
+
+ /* Only allow to write on TTY 0 */
+ if (gnss != pf->gnss_serial[0])
+ return -EIO;
+
+ mutex_lock(&gnss->gnss_mutex);
+
+ if (!gnss->open_count) {
+ err = -EINVAL;
+ goto exit;
+ }
+
+ cmd_buf = kzalloc(sizeof(*buf) * count, GFP_KERNEL);
+ if (!cmd_buf) {
+ err = -ENOMEM;
+ goto exit;
+ }
+
+ memcpy(cmd_buf, buf, count);
+
+ /* Send the data out to a hardware port */
+ write_buf = kzalloc(sizeof(*write_buf), GFP_KERNEL);
+ if (!write_buf) {
+ err = -ENOMEM;
+ goto exit;
+ }
+
+ write_buf->buf = cmd_buf;
+ write_buf->size = count;
+ INIT_LIST_HEAD(&write_buf->queue);
+ list_add_tail(&write_buf->queue, &gnss->queue);
+ kthread_queue_work(gnss->kworker, &gnss->write_work);
+exit:
+ mutex_unlock(&gnss->gnss_mutex);
+ return err;
}
/**
- * ice_gnss_tty_write_room - Dummy TTY write_room function to avoid kernel panic
+ * ice_gnss_tty_write_room - Returns the numbers of characters to be written.
* @tty: pointer to the tty_struct
+ *
+ * This routine returns the numbers of characters the tty driver will accept
+ * for queuing to be written or 0 if either the TTY is not open or user
+ * tries to write to the TTY other than the first.
*/
static unsigned int ice_gnss_tty_write_room(struct tty_struct *tty)
{
- return 0;
+ struct gnss_serial *gnss = tty->driver_data;
+
+ /* Only allow to write on TTY 0*/
+ if (!gnss || gnss != gnss->back->gnss_serial[0])
+ return 0;
+
+ mutex_lock(&gnss->gnss_mutex);
+
+ if (!gnss->open_count) {
+ mutex_unlock(&gnss->gnss_mutex);
+ return 0;
+ }
+
+ mutex_unlock(&gnss->gnss_mutex);
+ return ICE_GNSS_TTY_WRITE_BUF;
}
static const struct tty_operations tty_gps_ops = {
@@ -250,11 +420,13 @@ static struct tty_driver *ice_gnss_create_tty_driver(struct ice_pf *pf)
const int ICE_TTYDRV_NAME_MAX = 14;
struct tty_driver *tty_driver;
char *ttydrv_name;
+ unsigned int i;
int err;
- tty_driver = tty_alloc_driver(1, TTY_DRIVER_REAL_RAW);
+ tty_driver = tty_alloc_driver(ICE_GNSS_TTY_MINOR_DEVICES,
+ TTY_DRIVER_REAL_RAW);
if (IS_ERR(tty_driver)) {
- dev_err(ice_pf_to_dev(pf), "Failed to allocate memory for GNSS TTY\n");
+ dev_err(dev, "Failed to allocate memory for GNSS TTY\n");
return NULL;
}
@@ -284,23 +456,32 @@ static struct tty_driver *ice_gnss_create_tty_driver(struct ice_pf *pf)
tty_driver->driver_state = pf;
tty_set_operations(tty_driver, &tty_gps_ops);
- pf->gnss_serial = NULL;
+ for (i = 0; i < ICE_GNSS_TTY_MINOR_DEVICES; i++) {
+ pf->gnss_tty_port[i] = kzalloc(sizeof(*pf->gnss_tty_port[i]),
+ GFP_KERNEL);
+ pf->gnss_serial[i] = NULL;
- tty_port_init(&pf->gnss_tty_port);
- tty_port_link_device(&pf->gnss_tty_port, tty_driver, 0);
+ tty_port_init(pf->gnss_tty_port[i]);
+ tty_port_link_device(pf->gnss_tty_port[i], tty_driver, i);
+ }
err = tty_register_driver(tty_driver);
if (err) {
- dev_err(ice_pf_to_dev(pf), "Failed to register TTY driver err=%d\n",
- err);
+ dev_err(dev, "Failed to register TTY driver err=%d\n", err);
- tty_port_destroy(&pf->gnss_tty_port);
+ for (i = 0; i < ICE_GNSS_TTY_MINOR_DEVICES; i++) {
+ tty_port_destroy(pf->gnss_tty_port[i]);
+ kfree(pf->gnss_tty_port[i]);
+ }
kfree(ttydrv_name);
tty_driver_kref_put(pf->ice_gnss_tty_driver);
return NULL;
}
+ for (i = 0; i < ICE_GNSS_TTY_MINOR_DEVICES; i++)
+ dev_info(dev, "%s%d registered\n", ttydrv_name, i);
+
return tty_driver;
}
@@ -328,17 +509,25 @@ void ice_gnss_init(struct ice_pf *pf)
*/
void ice_gnss_exit(struct ice_pf *pf)
{
+ unsigned int i;
+
if (!test_bit(ICE_FLAG_GNSS, pf->flags) || !pf->ice_gnss_tty_driver)
return;
- tty_port_destroy(&pf->gnss_tty_port);
+ for (i = 0; i < ICE_GNSS_TTY_MINOR_DEVICES; i++) {
+ if (pf->gnss_tty_port[i]) {
+ tty_port_destroy(pf->gnss_tty_port[i]);
+ kfree(pf->gnss_tty_port[i]);
+ }
- if (pf->gnss_serial) {
- struct gnss_serial *gnss = pf->gnss_serial;
+ if (pf->gnss_serial[i]) {
+ struct gnss_serial *gnss = pf->gnss_serial[i];
- kthread_cancel_delayed_work_sync(&gnss->read_work);
- kfree(gnss);
- pf->gnss_serial = NULL;
+ kthread_cancel_work_sync(&gnss->write_work);
+ kthread_cancel_delayed_work_sync(&gnss->read_work);
+ kfree(gnss);
+ pf->gnss_serial[i] = NULL;
+ }
}
tty_unregister_driver(pf->ice_gnss_tty_driver);
diff --git a/drivers/net/ethernet/intel/ice/ice_gnss.h b/drivers/net/ethernet/intel/ice/ice_gnss.h
index 9211adb2372c..aaa5e03b4d1b 100644
--- a/drivers/net/ethernet/intel/ice/ice_gnss.h
+++ b/drivers/net/ethernet/intel/ice/ice_gnss.h
@@ -1,5 +1,5 @@
/* SPDX-License-Identifier: GPL-2.0 */
-/* Copyright (C) 2018-2021, Intel Corporation. */
+/* Copyright (C) 2021-2022, Intel Corporation. */
#ifndef _ICE_GNSS_H_
#define _ICE_GNSS_H_
@@ -8,14 +8,31 @@
#include <linux/tty_flip.h>
#define ICE_E810T_GNSS_I2C_BUS 0x2
+#define ICE_GNSS_TIMER_DELAY_TIME (HZ / 10) /* 0.1 second per message */
+#define ICE_GNSS_TTY_MINOR_DEVICES 2
+#define ICE_GNSS_TTY_WRITE_BUF 250
+#define ICE_MAX_I2C_DATA_SIZE FIELD_MAX(ICE_AQC_I2C_DATA_SIZE_M)
+#define ICE_MAX_I2C_WRITE_BYTES 4
+
+/* u-blox specific deifinitions */
#define ICE_GNSS_UBX_I2C_BUS_ADDR 0x42
/* Data length register is big endian */
#define ICE_GNSS_UBX_DATA_LEN_H 0xFD
#define ICE_GNSS_UBX_DATA_LEN_WIDTH 2
#define ICE_GNSS_UBX_EMPTY_DATA 0xFF
-#define ICE_GNSS_TIMER_DELAY_TIME (HZ / 10) /* 0.1 second per message */
-#define ICE_MAX_I2C_DATA_SIZE FIELD_MAX(ICE_AQC_I2C_DATA_SIZE_M)
+/* For u-blox writes are performed without address so the first byte to write is
+ * passed as I2C addr parameter.
+ */
+#define ICE_GNSS_UBX_WRITE_BYTES (ICE_MAX_I2C_WRITE_BYTES + 1)
#define ICE_MAX_UBX_READ_TRIES 255
+#define ICE_MAX_UBX_ACK_READ_TRIES 4095
+
+struct gnss_write_buf {
+ struct list_head queue;
+ unsigned int size;
+ unsigned char *buf;
+};
+
/**
* struct gnss_serial - data used to initialize GNSS TTY port
@@ -33,6 +50,8 @@ struct gnss_serial {
struct mutex gnss_mutex; /* protects GNSS serial structure */
struct kthread_worker *kworker;
struct kthread_delayed_work read_work;
+ struct kthread_work write_work;
+ struct list_head queue;
};
#if IS_ENABLED(CONFIG_TTY)
--
2.34.1
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