Lines Matching +full:write +full:- +full:to +full:- +full:read
11 * AS A COURTESY TO YOU, SOLELY FOR USE IN DEVELOPING PROGRAMS AND
18 * WARRANTY WHATSOEVER WITH RESPECT TO THE ADEQUACY OF THE
19 * IMPLEMENTATION, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OR
24 * (c) Copyright 2007-2008 Xilinx Inc.
28 * with this program; if not, write to the Free Software Foundation, Inc.,
39 #define XHI_WF_OFFSET 0x100 /* Write FIFO */
40 #define XHI_RF_OFFSET 0x104 /* Read FIFO */
44 #define XHI_WFV_OFFSET 0x114 /* Write FIFO Vacancy Register */
45 #define XHI_RFO_OFFSET 0x118 /* Read FIFO Occupancy Register */
56 * write.
58 * Interrupt Enable Register (IPIER) : This register is used to enable
60 * Writing a '1' to a bit enables the corresponding interrupt.
61 * Writing a '0' to a bit disables the corresponding interrupt.
66 #define XHI_IPIXR_RFULL_MASK 0x00000008 /* Read FIFO Full */
67 #define XHI_IPIXR_WEMPTY_MASK 0x00000004 /* Write FIFO Empty */
68 #define XHI_IPIXR_RDP_MASK 0x00000002 /* Read FIFO half full */
69 #define XHI_IPIXR_WRP_MASK 0x00000001 /* Write FIFO half full */
75 #define XHI_CR_READ_MASK 0x00000002 /* Read from ICAP to FIFO */
76 #define XHI_CR_WRITE_MASK 0x00000001 /* Write from FIFO to ICAP */
79 #define XHI_WFO_MAX_VACANCY 1024 /* Max Write FIFO Vacancy, in words */
80 #define XHI_RFO_MAX_OCCUPANCY 256 /* Max Read FIFO Occupancy, in words */
87 * fifo_icap_fifo_write - Write data to the write FIFO.
88 * @drvdata: a pointer to the drvdata.
89 * @data: the 32-bit value to be written to the FIFO.
96 dev_dbg(drvdata->dev, "fifo_write: %x\n", data); in fifo_icap_fifo_write()
97 out_be32(drvdata->base_address + XHI_WF_OFFSET, data); in fifo_icap_fifo_write()
101 * fifo_icap_fifo_read - Read data from the Read FIFO.
102 * @drvdata: a pointer to the drvdata.
108 u32 data = in_be32(drvdata->base_address + XHI_RF_OFFSET); in fifo_icap_fifo_read()
109 dev_dbg(drvdata->dev, "fifo_read: %x\n", data); in fifo_icap_fifo_read()
114 * fifo_icap_set_read_size - Set the size register.
115 * @drvdata: a pointer to the drvdata.
116 * @data: the size of the following read transaction, in words.
121 out_be32(drvdata->base_address + XHI_SZ_OFFSET, data); in fifo_icap_set_read_size()
125 * fifo_icap_start_config - Initiate a configuration (write) to the device.
126 * @drvdata: a pointer to the drvdata.
130 out_be32(drvdata->base_address + XHI_CR_OFFSET, XHI_CR_WRITE_MASK); in fifo_icap_start_config()
131 dev_dbg(drvdata->dev, "configuration started\n"); in fifo_icap_start_config()
135 * fifo_icap_start_readback - Initiate a readback from the device.
136 * @drvdata: a pointer to the drvdata.
140 out_be32(drvdata->base_address + XHI_CR_OFFSET, XHI_CR_READ_MASK); in fifo_icap_start_readback()
141 dev_dbg(drvdata->dev, "readback started\n"); in fifo_icap_start_readback()
145 * fifo_icap_get_status - Get the contents of the status register.
146 * @drvdata: a pointer to the drvdata.
150 * D8 - cfgerr
151 * D7 - dalign
152 * D6 - rip
153 * D5 - in_abort_l
154 * D4 - Always 1
155 * D3 - Always 1
156 * D2 - Always 1
157 * D1 - Always 1
158 * D0 - Done bit
162 u32 status = in_be32(drvdata->base_address + XHI_SR_OFFSET); in fifo_icap_get_status()
163 dev_dbg(drvdata->dev, "Getting status = %x\n", status); in fifo_icap_get_status()
168 * fifo_icap_busy - Return true if the ICAP is still processing a transaction.
169 * @drvdata: a pointer to the drvdata.
173 u32 status = in_be32(drvdata->base_address + XHI_SR_OFFSET); in fifo_icap_busy()
178 * fifo_icap_write_fifo_vacancy - Query the write fifo available space.
179 * @drvdata: a pointer to the drvdata.
181 * Return the number of words that can be safely pushed into the write fifo.
186 return in_be32(drvdata->base_address + XHI_WFV_OFFSET); in fifo_icap_write_fifo_vacancy()
190 * fifo_icap_read_fifo_occupancy - Query the read fifo available data.
191 * @drvdata: a pointer to the drvdata.
193 * Return the number of words that can be safely read from the read fifo.
198 return in_be32(drvdata->base_address + XHI_RFO_OFFSET); in fifo_icap_read_fifo_occupancy()
202 * fifo_icap_set_configuration - Send configuration data to the ICAP.
203 * @drvdata: a pointer to the drvdata.
204 * @frame_buffer: a pointer to the data to be written to the
206 * @num_words: the number of words (32 bit) to write to the ICAP
209 * This function writes the given user data to the Write FIFO in
210 * polled mode and starts the transfer of the data to
221 dev_dbg(drvdata->dev, "fifo_set_configuration\n"); in fifo_icap_set_configuration()
224 * Check if the ICAP device is Busy with the last Read/Write in fifo_icap_set_configuration()
227 return -EBUSY; in fifo_icap_set_configuration()
230 * Set up the buffer pointer and the words to be transferred. in fifo_icap_set_configuration()
243 return -EIO; in fifo_icap_set_configuration()
247 * Write data into the Write FIFO. in fifo_icap_set_configuration()
253 remaining_words--; in fifo_icap_set_configuration()
254 write_fifo_vacancy--; in fifo_icap_set_configuration()
261 /* Wait until the write has finished. */ in fifo_icap_set_configuration()
268 dev_dbg(drvdata->dev, "done fifo_set_configuration\n"); in fifo_icap_set_configuration()
271 * If the requested number of words have not been read from in fifo_icap_set_configuration()
275 return -EIO; in fifo_icap_set_configuration()
281 * fifo_icap_get_configuration - Read configuration data from the device.
282 * @drvdata: a pointer to the drvdata.
299 dev_dbg(drvdata->dev, "fifo_get_configuration\n"); in fifo_icap_get_configuration()
302 * Check if the ICAP device is Busy with the last Write/Read in fifo_icap_get_configuration()
305 return -EBUSY; in fifo_icap_get_configuration()
312 that can be read at one time. */ in fifo_icap_get_configuration()
316 remaining_words -= words_to_read; in fifo_icap_get_configuration()
328 return -EIO; in fifo_icap_get_configuration()
334 words_to_read -= read_fifo_occupancy; in fifo_icap_get_configuration()
336 /* Read the data from the Read FIFO. */ in fifo_icap_get_configuration()
339 read_fifo_occupancy--; in fifo_icap_get_configuration()
344 dev_dbg(drvdata->dev, "done fifo_get_configuration\n"); in fifo_icap_get_configuration()
350 * buffer_icap_reset - Reset the logic of the icap device.
351 * @drvdata: a pointer to the drvdata.
354 * All the registers will return to the default value and the FIFO is also
364 reg_data = in_be32(drvdata->base_address + XHI_CR_OFFSET); in fifo_icap_reset()
366 out_be32(drvdata->base_address + XHI_CR_OFFSET, in fifo_icap_reset()
369 out_be32(drvdata->base_address + XHI_CR_OFFSET, in fifo_icap_reset()
375 * fifo_icap_flush_fifo - This function flushes the FIFOs in the device.
376 * @drvdata: a pointer to the drvdata.
385 reg_data = in_be32(drvdata->base_address + XHI_CR_OFFSET); in fifo_icap_flush_fifo()
387 out_be32(drvdata->base_address + XHI_CR_OFFSET, in fifo_icap_flush_fifo()
390 out_be32(drvdata->base_address + XHI_CR_OFFSET, in fifo_icap_flush_fifo()