1 /* 1
2 * sh7724 MMCIF loader
3 *
4 * Copyright (C) 2010 Magnus Damm
5 *
6 * This file is subject to the terms and condi
7 * License. See the file "COPYING" in the mai
8 * for more details.
9 */
10
11 #include <linux/platform_data/sh_mmcif.h>
12 #include <mach/romimage.h>
13
14 #define MMCIF_BASE (void __iomem *)0xa4ca
15
16 #define MSTPCR2 0xa4150038
17 #define PTWCR 0xa4050146
18 #define PTXCR 0xa4050148
19 #define PSELA 0xa405014e
20 #define PSELE 0xa4050156
21 #define HIZCRC 0xa405015c
22 #define DRVCRA 0xa405018a
23
24 enum {
25 MMCIF_PROGRESS_ENTER,
26 MMCIF_PROGRESS_INIT,
27 MMCIF_PROGRESS_LOAD,
28 MMCIF_PROGRESS_DONE
29 };
30
31 /* SH7724 specific MMCIF loader
32 *
33 * loads the romImage from an MMC card startin
34 * use the following line to write the romImag
35 * # dd if=arch/sh/boot/romImage of=/dev/sdx b
36 */
37 asmlinkage void mmcif_loader(unsigned char *bu
38 {
39 mmcif_update_progress(MMCIF_PROGRESS_E
40
41 /* enable clock to the MMCIF hardware
42 __raw_writel(__raw_readl(MSTPCR2) & ~0
43
44 /* setup pins D7-D0 */
45 __raw_writew(0x0000, PTWCR);
46
47 /* setup pins MMC_CLK, MMC_CMD */
48 __raw_writew(__raw_readw(PTXCR) & ~0x0
49
50 /* select D3-D0 pin function */
51 __raw_writew(__raw_readw(PSELA) & ~0x2
52
53 /* select D7-D4 pin function */
54 __raw_writew(__raw_readw(PSELE) & ~0x3
55
56 /* disable Hi-Z for the MMC pins */
57 __raw_writew(__raw_readw(HIZCRC) & ~0x
58
59 /* high drive capability for MMC pins
60 __raw_writew(__raw_readw(DRVCRA) | 0x3
61
62 mmcif_update_progress(MMCIF_PROGRESS_I
63
64 /* setup MMCIF hardware */
65 sh_mmcif_boot_init(MMCIF_BASE);
66
67 mmcif_update_progress(MMCIF_PROGRESS_L
68
69 /* load kernel via MMCIF interface */
70 sh_mmcif_boot_do_read(MMCIF_BASE, 512,
71 (no_bytes + SH_M
72 buf);
73
74 /* disable clock to the MMCIF hardware
75 __raw_writel(__raw_readl(MSTPCR2) | 0x
76
77 mmcif_update_progress(MMCIF_PROGRESS_D
78 }
79
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