1/*
2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License as published by
4 * the Free Software Foundation; either version 2 of the License, or
5 * (at your option) any later version.
6 *
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
10 *
11 * GNU General Public License for more details.
12 *
13 * You should have received a copy of the GNU General Public License
14 * along with this program; if not, write to the Free Software
15 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
16 */
17
18#include <linux/kernel.h>
19#include <linux/init.h>
20#include <linux/module.h>
21#include <linux/types.h>
22#include <linux/device.h>
23#include <linux/string.h>
24#include <linux/slab.h>
25#include <linux/fs.h>
26#include <linux/platform_device.h>
27#include <linux/of.h>
28#include <linux/of_address.h>
29#include <linux/firmware.h>
30#include <linux/io.h>
31
32#include "io.h"
33
34static inline void byte0_out(unsigned char data);
35static inline void byte1_out(unsigned char data);
36static inline void xl_cclk_b(int32_t i);
37
38
39/* Assert and Deassert CCLK */
40void xl_shift_cclk(int count)
41{
42	int i;
43
44	for (i = 0; i < count; i++) {
45		xl_cclk_b(1);
46		xl_cclk_b(0);
47	}
48}
49
50int xl_supported_prog_bus_width(enum wbus bus_bytes)
51{
52	switch (bus_bytes) {
53	case bus_1byte:
54		break;
55	case bus_2byte:
56		break;
57	default:
58		pr_err("unsupported program bus width %d\n",
59				bus_bytes);
60		return 0;
61	}
62
63	return 1;
64}
65
66/* Serialize byte and clock each bit on target's DIN and CCLK pins */
67void xl_shift_bytes_out(enum wbus bus_byte, unsigned char *pdata)
68{
69	/*
70	 * supports 1 and 2 bytes programming mode
71	 */
72	if (likely(bus_byte == bus_2byte))
73		byte0_out(pdata[0]);
74
75	byte1_out(pdata[1]);
76	xl_shift_cclk(1);
77}
78
79/*
80 * generic bit swap for xilinx SYSTEMMAP FPGA programming
81 */
82static inline unsigned char bitswap(unsigned char s)
83{
84	unsigned char d;
85
86	d = (((s&0x80)>>7) | ((s&0x40)>>5) | ((s&0x20)>>3) | ((s&0x10)>>1) |
87		((s&0x08)<<1) | ((s&0x04)<<3) | ((s&0x02)<<5) | ((s&0x01)<<7));
88	return d;
89}
90
91void xl_program_b(int32_t i)
92{
93}
94
95void xl_rdwr_b(int32_t i)
96{
97}
98
99void xl_csi_b(int32_t i)
100{
101}
102
103int xl_get_init_b(void)
104{
105	return -1;
106}
107
108int xl_get_done_b(void)
109{
110	return -1;
111}
112
113static inline void byte0_out(unsigned char data)
114{
115}
116
117static inline void byte1_out(unsigned char data)
118{
119}
120
121static inline void xl_cclk_b(int32_t i)
122{
123}
124
125/*
126 * configurable per device type for different I/O config
127 */
128int xl_init_io(void)
129{
130	return -1;
131}
132