diff options
Diffstat (limited to 'drivers/soc/fsl/dpio/dpio.c')
| -rw-r--r-- | drivers/soc/fsl/dpio/dpio.c | 198 |
1 files changed, 198 insertions, 0 deletions
diff --git a/drivers/soc/fsl/dpio/dpio.c b/drivers/soc/fsl/dpio/dpio.c new file mode 100644 index 000000000000..ff37c80e11a0 --- /dev/null +++ b/drivers/soc/fsl/dpio/dpio.c @@ -0,0 +1,198 @@ +// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause) +/* + * Copyright 2013-2016 Freescale Semiconductor Inc. + * Copyright 2016 NXP + * + */ +#include <linux/kernel.h> +#include <linux/fsl/mc.h> + +#include "dpio.h" +#include "dpio-cmd.h" + +/* + * Data Path I/O Portal API + * Contains initialization APIs and runtime control APIs for DPIO + */ + +/** + * dpio_open() - Open a control session for the specified object + * @mc_io: Pointer to MC portal's I/O object + * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_' + * @dpio_id: DPIO unique ID + * @token: Returned token; use in subsequent API calls + * + * This function can be used to open a control session for an + * already created object; an object may have been declared in + * the DPL or by calling the dpio_create() function. + * This function returns a unique authentication token, + * associated with the specific object ID and the specific MC + * portal; this token must be used in all subsequent commands for + * this specific object. + * + * Return: '0' on Success; Error code otherwise. + */ +int dpio_open(struct fsl_mc_io *mc_io, + u32 cmd_flags, + int dpio_id, + u16 *token) +{ + struct fsl_mc_command cmd = { 0 }; + struct dpio_cmd_open *dpio_cmd; + int err; + + /* prepare command */ + cmd.header = mc_encode_cmd_header(DPIO_CMDID_OPEN, + cmd_flags, + 0); + dpio_cmd = (struct dpio_cmd_open *)cmd.params; + dpio_cmd->dpio_id = cpu_to_le32(dpio_id); + + err = mc_send_command(mc_io, &cmd); + if (err) + return err; + + /* retrieve response parameters */ + *token = mc_cmd_hdr_read_token(&cmd); + + return 0; +} + +/** + * dpio_close() - Close the control session of the object + * @mc_io: Pointer to MC portal's I/O object + * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_' + * @token: Token of DPIO object + * + * Return: '0' on Success; Error code otherwise. + */ +int dpio_close(struct fsl_mc_io *mc_io, + u32 cmd_flags, + u16 token) +{ + struct fsl_mc_command cmd = { 0 }; + + /* prepare command */ + cmd.header = mc_encode_cmd_header(DPIO_CMDID_CLOSE, + cmd_flags, + token); + + return mc_send_command(mc_io, &cmd); +} + +/** + * dpio_enable() - Enable the DPIO, allow I/O portal operations. + * @mc_io: Pointer to MC portal's I/O object + * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_' + * @token: Token of DPIO object + * + * Return: '0' on Success; Error code otherwise + */ +int dpio_enable(struct fsl_mc_io *mc_io, + u32 cmd_flags, + u16 token) +{ + struct fsl_mc_command cmd = { 0 }; + + /* prepare command */ + cmd.header = mc_encode_cmd_header(DPIO_CMDID_ENABLE, + cmd_flags, + token); + + return mc_send_command(mc_io, &cmd); +} + +/** + * dpio_disable() - Disable the DPIO, stop any I/O portal operation. + * @mc_io: Pointer to MC portal's I/O object + * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_' + * @token: Token of DPIO object + * + * Return: '0' on Success; Error code otherwise + */ +int dpio_disable(struct fsl_mc_io *mc_io, + u32 cmd_flags, + u16 token) +{ + struct fsl_mc_command cmd = { 0 }; + + /* prepare command */ + cmd.header = mc_encode_cmd_header(DPIO_CMDID_DISABLE, + cmd_flags, + token); + + return mc_send_command(mc_io, &cmd); +} + +/** + * dpio_get_attributes() - Retrieve DPIO attributes + * @mc_io: Pointer to MC portal's I/O object + * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_' + * @token: Token of DPIO object + * @attr: Returned object's attributes + * + * Return: '0' on Success; Error code otherwise + */ +int dpio_get_attributes(struct fsl_mc_io *mc_io, + u32 cmd_flags, + u16 token, + struct dpio_attr *attr) +{ + struct fsl_mc_command cmd = { 0 }; + struct dpio_rsp_get_attr *dpio_rsp; + int err; + + /* prepare command */ + cmd.header = mc_encode_cmd_header(DPIO_CMDID_GET_ATTR, + cmd_flags, + token); + + err = mc_send_command(mc_io, &cmd); + if (err) + return err; + + /* retrieve response parameters */ + dpio_rsp = (struct dpio_rsp_get_attr *)cmd.params; + attr->id = le32_to_cpu(dpio_rsp->id); + attr->qbman_portal_id = le16_to_cpu(dpio_rsp->qbman_portal_id); + attr->num_priorities = dpio_rsp->num_priorities; + attr->channel_mode = dpio_rsp->channel_mode & DPIO_CHANNEL_MODE_MASK; + attr->qbman_portal_ce_offset = + le64_to_cpu(dpio_rsp->qbman_portal_ce_addr); + attr->qbman_portal_ci_offset = + le64_to_cpu(dpio_rsp->qbman_portal_ci_addr); + attr->qbman_version = le32_to_cpu(dpio_rsp->qbman_version); + + return 0; +} + +/** + * dpio_get_api_version - Get Data Path I/O API version + * @mc_io: Pointer to MC portal's DPIO object + * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_' + * @major_ver: Major version of DPIO API + * @minor_ver: Minor version of DPIO API + * + * Return: '0' on Success; Error code otherwise + */ +int dpio_get_api_version(struct fsl_mc_io *mc_io, + u32 cmd_flags, + u16 *major_ver, + u16 *minor_ver) +{ + struct fsl_mc_command cmd = { 0 }; + int err; + + /* prepare command */ + cmd.header = mc_encode_cmd_header(DPIO_CMDID_GET_API_VERSION, + cmd_flags, 0); + + err = mc_send_command(mc_io, &cmd); + if (err) + return err; + + /* retrieve response parameters */ + mc_cmd_read_api_version(&cmd, major_ver, minor_ver); + + return 0; +} |