Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
misc: xilinx_sdfec: Add ability to get/set config
- Add capability to get SD-FEC config data using ioctl
XSDFEC_GET_CONFIG.
- Add capability to set SD-FEC data order using ioctl
SDFEC_SET_ORDER.
- Add capability to set SD-FEC bypass option using ioctl
XSDFEC_SET_BYPASS.
- Add capability to set SD-FEC active state using ioctl
XSDFEC_IS_ACTIVE.
Tested-by: Dragan Cvetic <dragan.cvetic@xilinx.com>
Signed-off-by: Derek Kiernan <derek.kiernan@xilinx.com>
Signed-off-by: Dragan Cvetic <dragan.cvetic@xilinx.com>
Link: https://lore.kernel.org/r/1564216438-322406-5-git-send-email-dragan.cvetic@xilinx.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
authored by
Dragan Cvetic
and committed by
Greg Kroah-Hartman
77dd39d9
20ec628e
+145
+88
drivers/misc/xilinx_sdfec.c
+88
drivers/misc/xilinx_sdfec.c
···
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xsdfec->state = XSDFEC_STOPPED;
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}
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static int xsdfec_get_config(struct xsdfec_dev *xsdfec, void __user *arg)
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{
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int err;
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+
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err = copy_to_user(arg, &xsdfec->config, sizeof(xsdfec->config));
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if (err)
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err = -EFAULT;
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+
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return err;
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}
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+
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static int xsdfec_set_turbo(struct xsdfec_dev *xsdfec, void __user *arg)
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{
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struct xsdfec_turbo turbo;
···
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return ret;
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}
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static int xsdfec_set_order(struct xsdfec_dev *xsdfec, void __user *arg)
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{
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bool order_invalid;
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enum xsdfec_order order;
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int err;
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+
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err = get_user(order, (enum xsdfec_order *)arg);
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if (err)
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return -EFAULT;
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+
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order_invalid = (order != XSDFEC_MAINTAIN_ORDER) &&
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(order != XSDFEC_OUT_OF_ORDER);
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if (order_invalid)
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return -EINVAL;
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/* Verify Device has not started */
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if (xsdfec->state == XSDFEC_STARTED)
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return -EIO;
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xsdfec_regwrite(xsdfec, XSDFEC_ORDER_ADDR, order);
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xsdfec->config.order = order;
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return 0;
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}
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static int xsdfec_set_bypass(struct xsdfec_dev *xsdfec, bool __user *arg)
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{
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bool bypass;
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int err;
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+
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err = get_user(bypass, arg);
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if (err)
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return -EFAULT;
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/* Verify Device has not started */
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if (xsdfec->state == XSDFEC_STARTED)
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return -EIO;
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if (bypass)
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xsdfec_regwrite(xsdfec, XSDFEC_BYPASS_ADDR, 1);
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else
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xsdfec_regwrite(xsdfec, XSDFEC_BYPASS_ADDR, 0);
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xsdfec->config.bypass = bypass;
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return 0;
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}
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static int xsdfec_is_active(struct xsdfec_dev *xsdfec, bool __user *arg)
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{
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u32 reg_value;
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bool is_active;
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int err;
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reg_value = xsdfec_regread(xsdfec, XSDFEC_ACTIVE_ADDR);
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/* using a double ! operator instead of casting */
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is_active = !!(reg_value & XSDFEC_IS_ACTIVITY_SET);
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err = put_user(is_active, arg);
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if (err)
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return -EFAULT;
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return err;
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}
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static u32
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xsdfec_translate_axis_width_cfg_val(enum xsdfec_axis_width axis_width_cfg)
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{
···
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}
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switch (cmd) {
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case XSDFEC_GET_CONFIG:
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rval = xsdfec_get_config(xsdfec, arg);
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break;
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case XSDFEC_SET_TURBO:
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rval = xsdfec_set_turbo(xsdfec, arg);
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break;
···
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break;
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case XSDFEC_ADD_LDPC_CODE_PARAMS:
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rval = xsdfec_add_ldpc(xsdfec, arg);
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break;
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case XSDFEC_SET_ORDER:
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rval = xsdfec_set_order(xsdfec, arg);
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break;
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case XSDFEC_SET_BYPASS:
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rval = xsdfec_set_bypass(xsdfec, arg);
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break;
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case XSDFEC_IS_ACTIVE:
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rval = xsdfec_is_active(xsdfec, (bool __user *)arg);
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break;
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default:
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/* Should not get here */
+57
include/uapi/misc/xilinx_sdfec.h
+57
include/uapi/misc/xilinx_sdfec.h
···
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#define XSDFEC_ADD_LDPC_CODE_PARAMS \
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_IOW(XSDFEC_MAGIC, 5, struct xsdfec_ldpc_params)
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/**
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* DOC: XSDFEC_GET_CONFIG
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* @Parameters
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*
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* @struct xsdfec_config *
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* Pointer to the &struct xsdfec_config that contains the current
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* configuration settings of the SD-FEC Block
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*
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* @Description
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*
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* ioctl that returns SD-FEC core configuration
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*/
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#define XSDFEC_GET_CONFIG _IOR(XSDFEC_MAGIC, 6, struct xsdfec_config)
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/**
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* DOC: XSDFEC_GET_TURBO
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* @Parameters
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*
···
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* ioctl that returns SD-FEC turbo param values
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*/
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#define XSDFEC_GET_TURBO _IOR(XSDFEC_MAGIC, 7, struct xsdfec_turbo)
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/**
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* DOC: XSDFEC_SET_ORDER
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* @Parameters
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*
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* @struct unsigned long *
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* Pointer to the unsigned long that contains a value from the
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* @enum xsdfec_order
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*
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* @Description
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*
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* ioctl that sets order, if order of blocks can change from input to output
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*
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* This can only be used when the driver is in the XSDFEC_STOPPED state
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*/
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#define XSDFEC_SET_ORDER _IOW(XSDFEC_MAGIC, 8, unsigned long)
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/**
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* DOC: XSDFEC_SET_BYPASS
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* @Parameters
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*
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* @struct bool *
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* Pointer to bool that sets the bypass value, where false results in
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* normal operation and false results in the SD-FEC performing the
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* configured operations (same number of cycles) but output data matches
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* the input data
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*
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* @Description
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*
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* ioctl that sets bypass.
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*
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* This can only be used when the driver is in the XSDFEC_STOPPED state
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*/
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#define XSDFEC_SET_BYPASS _IOW(XSDFEC_MAGIC, 9, bool)
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/**
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* DOC: XSDFEC_IS_ACTIVE
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* @Parameters
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*
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* @struct bool *
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* Pointer to bool that returns true if the SD-FEC is processing data
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*
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* @Description
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*
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* ioctl that determines if SD-FEC is processing data
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*/
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#define XSDFEC_IS_ACTIVE _IOR(XSDFEC_MAGIC, 10, bool)
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#endif /* __XILINX_SDFEC_H__ */