24  *     (c) Copyright 2003-2008 Xilinx Inc.
40 #define XHI_DEVICE_READ_ERROR       -1
41 #define XHI_DEVICE_WRITE_ERROR      -2
42 #define XHI_BUFFER_OVERFLOW_ERROR   -3
47 /* Constants for checking transfer status */
53 /* Size of transfer, read & write */
57 /* Read not Configure, direction of transfer.  Write only */
59 /* Indicates transfer complete. Read only */
73  * buffer_icap_get_status - Get the contents of the status register.
78  * D8 - cfgerr
79  * D7 - dalign
80  * D6 - rip
81  * D5 - in_abort_l
82  * D4 - Always 1
83  * D3 - Always 1
84  * D2 - Always 1
85  * D1 - Always 1
86  * D0 - Done bit
90 	return in_be32(drvdata->base_address + XHI_STATUS_REG_OFFSET);  in buffer_icap_get_status()
94  * buffer_icap_get_bram - Reads data from the storage buffer bram.
96  * @offset: The word offset from which the data should be read.
98  * A bram is used as a configuration memory cache.  One frame of data can
108  * buffer_icap_busy - Return true if the icap device is busy
122  * buffer_icap_set_size - Set the size register.
124  * @data: The size in bytes.
126  * The size register holds the number of 8 bit bytes to transfer between
130 		u32 data)  in buffer_icap_set_size()  argument
132 	out_be32(base_address + XHI_SIZE_REG_OFFSET, data);  in buffer_icap_set_size()
136  * buffer_icap_set_offset - Set the bram offset register.
138  * @data: is the value to be written to the data register.
140  * The bram offset register holds the starting bram address to transfer
141  * data from during configuration or write data to during readback.
144 		u32 data)  in buffer_icap_set_offset()  argument
146 	out_be32(base_address + XHI_BRAM_OFFSET_REG_OFFSET, data);  in buffer_icap_set_offset()
150  * buffer_icap_set_rnc - Set the RNC (Readback not Configure) register.
152  * @data: is the value to be written to the data register.
154  * The RNC register determines the direction of the data transfer.  It
156  * this register initiates the transfer.  A value of 1 initiates a
160 		u32 data)  in buffer_icap_set_rnc()  argument
162 	out_be32(base_address + XHI_RNC_REG_OFFSET, data);  in buffer_icap_set_rnc()
166  * buffer_icap_set_bram - Write data to the storage buffer bram.
168  * @offset: The word offset at which the data should be written.
169  * @data: The value to be written to the bram offset.
171  * A bram is used as a configuration memory cache.  One frame of data can
175 		u32 offset, u32 data)  in buffer_icap_set_bram()  argument
177 	out_be32(base_address + (offset << 2), data);  in buffer_icap_set_bram()
181  * buffer_icap_device_read - Transfer bytes from ICAP to the storage buffer.
192 	void __iomem *base_address = drvdata->base_address;  in buffer_icap_device_read()
195 		return -EBUSY;  in buffer_icap_device_read()
198 		return -EINVAL;  in buffer_icap_device_read()
208 			return -EBUSY;  in buffer_icap_device_read()
215  * buffer_icap_device_write - Transfer bytes from ICAP to the storage buffer.
226 	void __iomem *base_address = drvdata->base_address;  in buffer_icap_device_write()
229 		return -EBUSY;  in buffer_icap_device_write()
232 		return -EINVAL;  in buffer_icap_device_write()
242 			return -EBUSY;  in buffer_icap_device_write()
249  * buffer_icap_reset - Reset the logic of the icap device.
258     out_be32(drvdata->base_address + XHI_STATUS_REG_OFFSET, 0xFEFE);  in buffer_icap_reset()
262  * buffer_icap_set_configuration - Load a partial bitstream from system memory.
264  * @data: Kernel address of the partial bitstream.
267 int buffer_icap_set_configuration(struct hwicap_drvdata *drvdata, u32 *data,  in buffer_icap_set_configuration()  argument
274 	void __iomem *base_address = drvdata->base_address;  in buffer_icap_set_configuration()
276 	/* Loop through all the data */  in buffer_icap_set_configuration()
279 		/* Copy data to bram */  in buffer_icap_set_configuration()
280 		buffer_icap_set_bram(base_address, buffer_count, data[i]);  in buffer_icap_set_configuration()
283 		if (buffer_count < XHI_MAX_BUFFER_INTS - 1) {  in buffer_icap_set_configuration()
288 		/* Write data to ICAP */  in buffer_icap_set_configuration()
303 	/* Write unwritten data to ICAP */  in buffer_icap_set_configuration()
305 		/* Write data to ICAP */  in buffer_icap_set_configuration()
319  * buffer_icap_get_configuration - Read configuration data from the device.
321  * @data: Address of the data representing the partial bitstream
324 int buffer_icap_get_configuration(struct hwicap_drvdata *drvdata, u32 *data,  in buffer_icap_get_configuration()  argument
330 	void __iomem *base_address = drvdata->base_address;  in buffer_icap_get_configuration()
332 	/* Loop through all the data */  in buffer_icap_get_configuration()
335 			u32 words_remaining = size - i;  in buffer_icap_get_configuration()
341 			/* Read data from ICAP */  in buffer_icap_get_configuration()
355 		/* Copy data from bram */  in buffer_icap_get_configuration()
356 		data[i] = buffer_icap_get_bram(base_address, buffer_count);  in buffer_icap_get_configuration()