OpenWrt – Blame information for rev 4

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4 office 1 /*
2 * Copyright (C) 2009-2012 Gabor Juhos <juhosg@openwrt.org>
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License version 2 as published
6 * by the Free Software Foundation.
7 */
8  
9 #include <linux/init.h>
10 #include <linux/spi/spi.h>
11 #include <linux/spi/flash.h>
12 #include <linux/mtd/mtd.h>
13 #include <linux/mtd/partitions.h>
14 #include <linux/mtd/concat.h>
15  
16 #include "dev-spi.h"
17 #include "dev-m25p80.h"
18  
19 static struct spi_board_info ath79_spi_info[] = {
20 {
21 .bus_num = 0,
22 .chip_select = 0,
23 .max_speed_hz = 25000000,
24 .modalias = "m25p80",
25 },
26 {
27 .bus_num = 0,
28 .chip_select = 1,
29 .max_speed_hz = 25000000,
30 .modalias = "m25p80",
31 }
32 };
33  
34 static struct ath79_spi_platform_data ath79_spi_data;
35  
36 void __init ath79_register_m25p80(struct flash_platform_data *pdata)
37 {
38 ath79_spi_data.bus_num = 0;
39 ath79_spi_data.num_chipselect = 1;
40 ath79_spi_info[0].platform_data = pdata;
41 ath79_register_spi(&ath79_spi_data, ath79_spi_info, 1);
42 }
43  
44 static struct flash_platform_data *multi_pdata;
45  
46 static struct mtd_info *concat_devs[2] = { NULL, NULL };
47 static struct work_struct mtd_concat_work;
48  
49 static void mtd_concat_add_work(struct work_struct *work)
50 {
51 struct mtd_info *mtd;
52  
53 mtd = mtd_concat_create(concat_devs, ARRAY_SIZE(concat_devs), "flash");
54  
55 mtd_device_register(mtd, multi_pdata->parts, multi_pdata->nr_parts);
56 }
57  
58 static void mtd_concat_add(struct mtd_info *mtd)
59 {
60 static bool registered = false;
61  
62 if (registered)
63 return;
64  
65 if (!strcmp(mtd->name, "spi0.0"))
66 concat_devs[0] = mtd;
67 else if (!strcmp(mtd->name, "spi0.1"))
68 concat_devs[1] = mtd;
69 else
70 return;
71  
72 if (!concat_devs[0] || !concat_devs[1])
73 return;
74  
75 registered = true;
76 INIT_WORK(&mtd_concat_work, mtd_concat_add_work);
77 schedule_work(&mtd_concat_work);
78 }
79  
80 static void mtd_concat_remove(struct mtd_info *mtd)
81 {
82 }
83  
84 static void add_mtd_concat_notifier(void)
85 {
86 static struct mtd_notifier not = {
87 .add = mtd_concat_add,
88 .remove = mtd_concat_remove,
89 };
90  
91 register_mtd_user(&not);
92 }
93  
94 void __init ath79_register_m25p80_multi(struct flash_platform_data *pdata)
95 {
96 multi_pdata = pdata;
97 add_mtd_concat_notifier();
98 ath79_spi_data.bus_num = 0;
99 ath79_spi_data.num_chipselect = 2;
100 ath79_register_spi(&ath79_spi_data, ath79_spi_info, 2);
101 }