1 /*****************************************************************************
2 *
3 * Author: Xilinx, Inc.
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; either version 2 of the License, or (at your
8 * option) any later version.
9 *
10 * XILINX IS PROVIDING THIS DESIGN, CODE, OR INFORMATION "AS IS"
11 * AS A COURTESY TO YOU, SOLELY FOR USE IN DEVELOPING PROGRAMS AND
12 * SOLUTIONS FOR XILINX DEVICES. BY PROVIDING THIS DESIGN, CODE,
13 * OR INFORMATION AS ONE POSSIBLE IMPLEMENTATION OF THIS FEATURE,
14 * APPLICATION OR STANDARD, XILINX IS MAKING NO REPRESENTATION
15 * THAT THIS IMPLEMENTATION IS FREE FROM ANY CLAIMS OF INFRINGEMENT,
16 * AND YOU ARE RESPONSIBLE FOR OBTAINING ANY RIGHTS YOU MAY REQUIRE
17 * FOR YOUR IMPLEMENTATION. XILINX EXPRESSLY DISCLAIMS ANY
18 * WARRANTY WHATSOEVER WITH RESPECT TO THE ADEQUACY OF THE
19 * IMPLEMENTATION, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OR
20 * REPRESENTATIONS THAT THIS IMPLEMENTATION IS FREE FROM CLAIMS OF
21 * INFRINGEMENT, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
22 * FOR A PARTICULAR PURPOSE.
23 *
24 * (c) Copyright 2003-2007 Xilinx Inc.
25 * All rights reserved.
26 *
27 * You should have received a copy of the GNU General Public License along
28 * with this program; if not, write to the Free Software Foundation, Inc.,
29 * 675 Mass Ave, Cambridge, MA 02139, USA.
30 *
31 *****************************************************************************/
32
33 #ifndef XILINX_HWICAP_H_ /* prevent circular inclusions */
34 #define XILINX_HWICAP_H_ /* by using protection macros */
35
36 #include <linux/types.h>
37 #include <linux/cdev.h>
38 #include <linux/platform_device.h>
39
40 #include <linux/io.h>
41
42 struct hwicap_drvdata {
43 u32 write_buffer_in_use; /* Always in [0,3] */
44 u8 write_buffer[4];
45 u32 read_buffer_in_use; /* Always in [0,3] */
46 u8 read_buffer[4];
47 resource_size_t mem_start;/* phys. address of the control registers */
48 resource_size_t mem_end; /* phys. address of the control registers */
49 resource_size_t mem_size;
50 void __iomem *base_address;/* virt. address of the control registers */
51
52 struct device *dev;
53 struct cdev cdev; /* Char device structure */
54 dev_t devt;
55
56 const struct hwicap_driver_config *config;
57 const struct config_registers *config_regs;
58 void *private_data;
59 bool is_open;
60 struct mutex sem;
61 };
62
63 struct hwicap_driver_config {
64 /* Read configuration data given by size into the data buffer.
65 * Return 0 if successful.
66 */
67 int (*get_configuration)(struct hwicap_drvdata *drvdata, u32 *data,
68 u32 size);
69 /* Write configuration data given by size from the data buffer.
70 * Return 0 if successful.
71 */
72 int (*set_configuration)(struct hwicap_drvdata *drvdata, u32 *data,
73 u32 size);
74 /* Get the status register, bit pattern given by:
75 * D8 - 0 = configuration error
76 * D7 - 1 = alignment found
77 * D6 - 1 = readback in progress
78 * D5 - 0 = abort in progress
79 * D4 - Always 1
80 * D3 - Always 1
81 * D2 - Always 1
82 * D1 - Always 1
83 * D0 - 1 = operation completed
84 */
85 u32 (*get_status)(struct hwicap_drvdata *drvdata);
86 /* Reset the hw */
87 void (*reset)(struct hwicap_drvdata *drvdata);
88 };
89
90 /* Number of times to poll the done register. This has to be large
91 * enough to allow an entire configuration to complete. If an entire
92 * page (4kb) is configured at once, that could take up to 4k cycles
93 * with a byte-wide icap interface. In most cases, this driver is
94 * used with a much smaller fifo, but this should be sufficient in the
95 * worst case.
96 */
97 #define XHI_MAX_RETRIES 5000
98
99 /************ Constant Definitions *************/
100
101 #define XHI_PAD_FRAMES 0x1
102
103 /* Mask for calculating configuration packet headers */
104 #define XHI_WORD_COUNT_MASK_TYPE_1 0x7FFUL
105 #define XHI_WORD_COUNT_MASK_TYPE_2 0x1FFFFFUL
106 #define XHI_TYPE_MASK 0x7
107 #define XHI_REGISTER_MASK 0xF
108 #define XHI_OP_MASK 0x3
109
110 #define XHI_TYPE_SHIFT 29
111 #define XHI_REGISTER_SHIFT 13
112 #define XHI_OP_SHIFT 27
113
114 #define XHI_TYPE_1 1
115 #define XHI_TYPE_2 2
116 #define XHI_OP_WRITE 2
117 #define XHI_OP_READ 1
118
119 /* Address Block Types */
120 #define XHI_FAR_CLB_BLOCK 0
121 #define XHI_FAR_BRAM_BLOCK 1
122 #define XHI_FAR_BRAM_INT_BLOCK 2
123
124 struct config_registers {
125 u32 CRC;
126 u32 FAR;
127 u32 FDRI;
128 u32 FDRO;
129 u32 CMD;
130 u32 CTL;
131 u32 MASK;
132 u32 STAT;
133 u32 LOUT;
134 u32 COR;
135 u32 MFWR;
136 u32 FLR;
137 u32 KEY;
138 u32 CBC;
139 u32 IDCODE;
140 u32 AXSS;
141 u32 C0R_1;
142 u32 CSOB;
143 u32 WBSTAR;
144 u32 TIMER;
145 u32 BOOTSTS;
146 u32 CTL_1;
147 };
148
149 /* Configuration Commands */
150 #define XHI_CMD_NULL 0
151 #define XHI_CMD_WCFG 1
152 #define XHI_CMD_MFW 2
153 #define XHI_CMD_DGHIGH 3
154 #define XHI_CMD_RCFG 4
155 #define XHI_CMD_START 5
156 #define XHI_CMD_RCAP 6
157 #define XHI_CMD_RCRC 7
158 #define XHI_CMD_AGHIGH 8
159 #define XHI_CMD_SWITCH 9
160 #define XHI_CMD_GRESTORE 10
161 #define XHI_CMD_SHUTDOWN 11
162 #define XHI_CMD_GCAPTURE 12
163 #define XHI_CMD_DESYNCH 13
164 #define XHI_CMD_IPROG 15 /* Only in Virtex5 */
165 #define XHI_CMD_CRCC 16 /* Only in Virtex5 */
166 #define XHI_CMD_LTIMER 17 /* Only in Virtex5 */
167
168 /* Packet constants */
169 #define XHI_SYNC_PACKET 0xAA995566UL
170 #define XHI_DUMMY_PACKET 0xFFFFFFFFUL
171 #define XHI_NOOP_PACKET (XHI_TYPE_1 << XHI_TYPE_SHIFT)
172 #define XHI_TYPE_2_READ ((XHI_TYPE_2 << XHI_TYPE_SHIFT) | \
173 (XHI_OP_READ << XHI_OP_SHIFT))
174
175 #define XHI_TYPE_2_WRITE ((XHI_TYPE_2 << XHI_TYPE_SHIFT) | \
176 (XHI_OP_WRITE << XHI_OP_SHIFT))
177
178 #define XHI_TYPE2_CNT_MASK 0x07FFFFFF
179
180 #define XHI_TYPE_1_PACKET_MAX_WORDS 2047UL
181 #define XHI_TYPE_1_HEADER_BYTES 4
182 #define XHI_TYPE_2_HEADER_BYTES 8
183
184 /* Constant to use for CRC check when CRC has been disabled */
185 #define XHI_DISABLED_AUTO_CRC 0x0000DEFCUL
186
187 /* Meanings of the bits returned by get_status */
188 #define XHI_SR_CFGERR_N_MASK 0x00000100 /* Config Error Mask */
189 #define XHI_SR_DALIGN_MASK 0x00000080 /* Data Alignment Mask */
190 #define XHI_SR_RIP_MASK 0x00000040 /* Read back Mask */
191 #define XHI_SR_IN_ABORT_N_MASK 0x00000020 /* Select Map Abort Mask */
192 #define XHI_SR_DONE_MASK 0x00000001 /* Done bit Mask */
193
194 /**
195 * hwicap_type_1_read - Generates a Type 1 read packet header.
196 * @reg: is the address of the register to be read back.
197 *
198 * Return:
199 * Generates a Type 1 read packet header, which is used to indirectly
200 * read registers in the configuration logic. This packet must then
201 * be sent through the icap device, and a return packet received with
202 * the information.
203 */
hwicap_type_1_read(u32 reg)204 static inline u32 hwicap_type_1_read(u32 reg)
205 {
206 return (XHI_TYPE_1 << XHI_TYPE_SHIFT) |
207 (reg << XHI_REGISTER_SHIFT) |
208 (XHI_OP_READ << XHI_OP_SHIFT);
209 }
210
211 /**
212 * hwicap_type_1_write - Generates a Type 1 write packet header
213 * @reg: is the address of the register to be read back.
214 *
215 * Return: Type 1 write packet header
216 */
hwicap_type_1_write(u32 reg)217 static inline u32 hwicap_type_1_write(u32 reg)
218 {
219 return (XHI_TYPE_1 << XHI_TYPE_SHIFT) |
220 (reg << XHI_REGISTER_SHIFT) |
221 (XHI_OP_WRITE << XHI_OP_SHIFT);
222 }
223
224 #endif
225