tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Copyright 2010 MontaVista Software, LLC.
3 *
4 * Author: Anton Vorontsov <avorontsov@ru.mvista.com>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
10
11#ifndef _DRIVERS_MMC_SDHCI_PLTFM_H
12#define _DRIVERS_MMC_SDHCI_PLTFM_H
13
14#include <linux/clk.h>
15#include <linux/platform_device.h>
16#include "sdhci.h"
17
18struct sdhci_pltfm_data {
19 struct sdhci_ops *ops;
20 unsigned int quirks;
21};
22
23struct sdhci_pltfm_host {
24 struct clk *clk;
25 void *priv; /* to handle quirks across io-accessor calls */
26
27 /* migrate from sdhci_of_host */
28 unsigned int clock;
29 u16 xfer_mode_shadow;
30};
31
32#ifdef CONFIG_MMC_SDHCI_BIG_ENDIAN_32BIT_BYTE_SWAPPER
33/*
34 * These accessors are designed for big endian hosts doing I/O to
35 * little endian controllers incorporating a 32-bit hardware byte swapper.
36 */
37static inline u32 sdhci_be32bs_readl(struct sdhci_host *host, int reg)
38{
39 return in_be32(host->ioaddr + reg);
40}
41
42static inline u16 sdhci_be32bs_readw(struct sdhci_host *host, int reg)
43{
44 return in_be16(host->ioaddr + (reg ^ 0x2));
45}
46
47static inline u8 sdhci_be32bs_readb(struct sdhci_host *host, int reg)
48{
49 return in_8(host->ioaddr + (reg ^ 0x3));
50}
51
52static inline void sdhci_be32bs_writel(struct sdhci_host *host,
53 u32 val, int reg)
54{
55 out_be32(host->ioaddr + reg, val);
56}
57
58static inline void sdhci_be32bs_writew(struct sdhci_host *host,
59 u16 val, int reg)
60{
61 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
62 int base = reg & ~0x3;
63 int shift = (reg & 0x2) * 8;
64
65 switch (reg) {
66 case SDHCI_TRANSFER_MODE:
67 /*
68 * Postpone this write, we must do it together with a
69 * command write that is down below.
70 */
71 pltfm_host->xfer_mode_shadow = val;
72 return;
73 case SDHCI_COMMAND:
74 sdhci_be32bs_writel(host,
75 val << 16 | pltfm_host->xfer_mode_shadow,
76 SDHCI_TRANSFER_MODE);
77 return;
78 }
79 clrsetbits_be32(host->ioaddr + base, 0xffff << shift, val << shift);
80}
81
82static inline void sdhci_be32bs_writeb(struct sdhci_host *host, u8 val, int reg)
83{
84 int base = reg & ~0x3;
85 int shift = (reg & 0x3) * 8;
86
87 clrsetbits_be32(host->ioaddr + base , 0xff << shift, val << shift);
88}
89#endif /* CONFIG_MMC_SDHCI_BIG_ENDIAN_32BIT_BYTE_SWAPPER */
90
91extern void sdhci_get_of_property(struct platform_device *pdev);
92
93extern struct sdhci_host *sdhci_pltfm_init(struct platform_device *pdev,
94 struct sdhci_pltfm_data *pdata);
95extern void sdhci_pltfm_free(struct platform_device *pdev);
96
97extern int sdhci_pltfm_register(struct platform_device *pdev,
98 struct sdhci_pltfm_data *pdata);
99extern int sdhci_pltfm_unregister(struct platform_device *pdev);
100
101#ifdef CONFIG_PM
102extern const struct dev_pm_ops sdhci_pltfm_pmops;
103#define SDHCI_PLTFM_PMOPS (&sdhci_pltfm_pmops)
104#else
105#define SDHCI_PLTFM_PMOPS NULL
106#endif
107
108#endif /* _DRIVERS_MMC_SDHCI_PLTFM_H */