27  * <CSR address>:<CSR value>
28  * So reading the content of the file gives current CSR address and it value.
29  * If User-space application wishes to change current CSR address,
31  * $ echo "<CSR address>" > /sys/kernel/debug/idt_csr/<bus>-<devaddr>/<devname>
32  * If it wants to change the CSR value as well, the format of the write
34  * $ echo "<CSR address>:<CSR value>" > \
36  * CSR address and value can be any of hexadecimal, decimal or octal format.
64  * csr_dbgdir - CSR read/write operations Debugfs directory
75  * @inicsrcmd:	Initial cmd value for CSR read/write operations
78  * @csr:	CSR address to perform read operation
98 	u16 csr;  member
137  * struct idt_csr_seq - sequence of data to be read/written from/to CSR
139  * @csraddr:	Internal IDT device CSR address
140  * @data:	Data to be read/written from/to the CSR address
152  * @CCODE_CSR:		CSR read/write transaction
197  * CSR command macros
199  * @CSR_OP_WRITE:	CSR write operation
200  * @CSR_OP_READ:	CSR read operation
206  * @CSR_MAX:		Maximum CSR address
207  * @CSR_DEF:		Default CSR address
208  * @CSR_REAL_ADDR:	CSR real unshifted address
708  *                          CSR IO-operations
713  * idt_csr_write() - CSR write operation
715  * @csraddr:	CSR address (with no two LS bits)
716  * @data:	Data to be written to CSR
740 		dev_err(dev, "Failed to write 0x%04x: 0x%04x to csr",  in idt_csr_write()
745 	/* Send CSR address to read data from */  in idt_csr_write()
750 		dev_err(dev, "Failed to init csr address 0x%04x",  in idt_csr_write()
759 		dev_err(dev, "Failed to read csr 0x%04x",  in idt_csr_write()
764 	/* Check whether IDT successfully retrieved CSR data */  in idt_csr_write()
766 		dev_err(dev, "IDT failed to perform CSR r/w");  in idt_csr_write()
779  * idt_csr_read() - CSR read operation
781  * @csraddr:	CSR address (with no two LS bits)
782  * @data:	Data to be written to CSR
798 	/* Send CSR register address before reading it */  in idt_csr_read()
804 		dev_err(dev, "Failed to init csr address 0x%04x",  in idt_csr_read()
813 		dev_err(dev, "Failed to read csr 0x%04x",  in idt_csr_read()
818 	/* Check whether IDT successfully retrieved CSR data */  in idt_csr_read()
820 		dev_err(dev, "IDT failed to perform CSR r/w");  in idt_csr_read()
889  * idt_dbgfs_csr_write() - CSR debugfs-node write callback
924 	 * If there is colon passed then new CSR value should be parsed as  in idt_dbgfs_csr_write()
925 	 * well, so allocate buffer for CSR address substring.  in idt_dbgfs_csr_write()
927 	 * no new CSR value  in idt_dbgfs_csr_write()
943 	/* Convert CSR address to u32 value */  in idt_dbgfs_csr_write()
955 	pdev->csr = (csraddr >> 2);  in idt_dbgfs_csr_write()
957 	/* Parse new CSR value and send it to IDT, if colon has been found */  in idt_dbgfs_csr_write()
963 		ret = idt_csr_write(pdev, pdev->csr, csrval);  in idt_dbgfs_csr_write()
981  * idt_dbgfs_csr_read() - CSR debugfs-node read callback
998 	/* Perform CSR read operation */  in idt_dbgfs_csr_read()
999 	ret = idt_csr_read(pdev, pdev->csr, &csrval);  in idt_dbgfs_csr_read()
1004 	csraddr = ((u32)pdev->csr << 2);  in idt_dbgfs_csr_read()
1023  * csr_dbgfs_ops - CSR debugfs-node read/write operations
1151 	/* Initialize basic CSR CMD field - use full DWORD-sized r/w ops */  in idt_create_pdev()
1153 	pdev->csr = CSR_DEF;  in idt_create_pdev()
1337 	/* Create Debugfs directory for CSR file */  in idt_create_dbgfs_files()
1341 	/* Create Debugfs file for CSR read/write operations */  in idt_create_dbgfs_files()
1352 	/* Remove CSR directory and it sysfs-node */  in idt_remove_dbgfs_files()