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mmc: sdhi: Add write16_hook
[linux-2.6-block.git] / drivers / mmc / host / tmio_mmc.h
CommitLineData
b6147490
GL		 1/*
2 * linux/drivers/mmc/host/tmio_mmc.h
3 *
4 * Copyright (C) 2007 Ian Molton
5 * Copyright (C) 2004 Ian Molton
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 *
11 * Driver for the MMC / SD / SDIO cell found in:
12 *
13 * TC6393XB TC6391XB TC6387XB T7L66XB ASIC3
14 */
15
16#ifndef TMIO_MMC_H
17#define TMIO_MMC_H
18
19#include <linux/highmem.h>
cba179ae 20#include <linux/mmc/tmio.h>
b6147490 21#include <linux/pagemap.h>
df3ef2d3 22#include <linux/spinlock.h>
b6147490 23
b6147490 24/* Definitions for values the CTRL_SDIO_STATUS register can take. */
cba179ae 25#define TMIO_SDIO_STAT_IOIRQ 0x0001
b6147490 26#define TMIO_SDIO_STAT_EXPUB52 0x4000
cba179ae
SH		 27#define TMIO_SDIO_STAT_EXWT 0x8000
28#define TMIO_SDIO_MASK_ALL 0xc007
b6147490
GL		 29
30/* Define some IRQ masks */
31/* This is the mask used at reset by the chip */
32#define TMIO_MASK_ALL 0x837f031d
33#define TMIO_MASK_READOP (TMIO_STAT_RXRDY | TMIO_STAT_DATAEND)
34#define TMIO_MASK_WRITEOP (TMIO_STAT_TXRQ | TMIO_STAT_DATAEND)
35#define TMIO_MASK_CMD (TMIO_STAT_CMDRESPEND | TMIO_STAT_CMDTIMEOUT | \
36 TMIO_STAT_CARD_REMOVE | TMIO_STAT_CARD_INSERT)
37#define TMIO_MASK_IRQ (TMIO_MASK_READOP | TMIO_MASK_WRITEOP | TMIO_MASK_CMD)
38
39struct tmio_mmc_data;
40
41struct tmio_mmc_host {
42 void __iomem *ctl;
43 unsigned long bus_shift;
44 struct mmc_command *cmd;
45 struct mmc_request *mrq;
46 struct mmc_data *data;
47 struct mmc_host *mmc;
b6147490
GL		 48 unsigned int sdio_irq_enabled;
49
50 /* Callbacks for clock / power control */
51 void (*set_pwr)(struct platform_device *host, int state);
52 void (*set_clk_div)(struct platform_device *host, int state);
53
e6ee7182
GL		 54 int pm_error;
55
b6147490
GL		 56 /* pio related stuff */
57 struct scatterlist *sg_ptr;
58 struct scatterlist *sg_orig;
59 unsigned int sg_len;
60 unsigned int sg_off;
61
62 struct platform_device *pdev;
63 struct tmio_mmc_data *pdata;
64
65 /* DMA support */
66 bool force_pio;
67 struct dma_chan *chan_rx;
68 struct dma_chan *chan_tx;
69 struct tasklet_struct dma_complete;
70 struct tasklet_struct dma_issue;
71 struct scatterlist bounce_sg;
72 u8 *bounce_buf;
73
74 /* Track lost interrupts */
75 struct delayed_work delayed_reset_work;
76 spinlock_t lock;
77 unsigned long last_req_ts;
78};
79
80int tmio_mmc_host_probe(struct tmio_mmc_host **host,
81 struct platform_device *pdev,
82 struct tmio_mmc_data *pdata);
83void tmio_mmc_host_remove(struct tmio_mmc_host *host);
84void tmio_mmc_do_data_irq(struct tmio_mmc_host *host);
85
86void tmio_mmc_enable_mmc_irqs(struct tmio_mmc_host *host, u32 i);
87void tmio_mmc_disable_mmc_irqs(struct tmio_mmc_host *host, u32 i);
8e7bfdb3 88irqreturn_t tmio_mmc_irq(int irq, void *devid);
b6147490
GL		 89
90static inline char *tmio_mmc_kmap_atomic(struct scatterlist *sg,
91 unsigned long *flags)
92{
93 local_irq_save(*flags);
94 return kmap_atomic(sg_page(sg), KM_BIO_SRC_IRQ) + sg->offset;
95}
96
97static inline void tmio_mmc_kunmap_atomic(struct scatterlist *sg,
98 unsigned long *flags, void *virt)
99{
100 kunmap_atomic(virt - sg->offset, KM_BIO_SRC_IRQ);
101 local_irq_restore(*flags);
102}
103
42051e8a 104#if defined(CONFIG_MMC_SDHI) || defined(CONFIG_MMC_SDHI_MODULE)
b6147490
GL		 105void tmio_mmc_start_dma(struct tmio_mmc_host *host, struct mmc_data *data);
106void tmio_mmc_request_dma(struct tmio_mmc_host *host, struct tmio_mmc_data *pdata);
107void tmio_mmc_release_dma(struct tmio_mmc_host *host);
108#else
109static inline void tmio_mmc_start_dma(struct tmio_mmc_host *host,
110 struct mmc_data *data)
111{
112}
113
114static inline void tmio_mmc_request_dma(struct tmio_mmc_host *host,
115 struct tmio_mmc_data *pdata)
116{
117 host->chan_tx = NULL;
118 host->chan_rx = NULL;
119}
120
121static inline void tmio_mmc_release_dma(struct tmio_mmc_host *host)
122{
123}
124#endif
125
e6ee7182
GL		 126#ifdef CONFIG_PM
127int tmio_mmc_host_suspend(struct device *dev);
128int tmio_mmc_host_resume(struct device *dev);
129#else
130#define tmio_mmc_host_suspend NULL
131#define tmio_mmc_host_resume NULL
132#endif
133
7311bef0
GL		 134int tmio_mmc_host_runtime_suspend(struct device *dev);
135int tmio_mmc_host_runtime_resume(struct device *dev);
136
a11862d3
SH		 137static inline u16 sd_ctrl_read16(struct tmio_mmc_host *host, int addr)
138{
139 return readw(host->ctl + (addr << host->bus_shift));
140}
141
142static inline void sd_ctrl_read16_rep(struct tmio_mmc_host *host, int addr,
143 u16 *buf, int count)
144{
145 readsw(host->ctl + (addr << host->bus_shift), buf, count);
146}
147
148static inline u32 sd_ctrl_read32(struct tmio_mmc_host *host, int addr)
149{
150 return readw(host->ctl + (addr << host->bus_shift)) |
151 readw(host->ctl + ((addr + 2) << host->bus_shift)) << 16;
152}
153
154static inline void sd_ctrl_write16(struct tmio_mmc_host *host, int addr, u16 val)
155{
973ed3af
SH		 156 /* If there is a hook and it returns non-zero then there
157 * is an error and the write should be skipped
158 */
159 if (host->pdata->write16_hook && host->pdata->write16_hook(host, addr))
160 return;
a11862d3
SH		 161 writew(val, host->ctl + (addr << host->bus_shift));
162}
163
164static inline void sd_ctrl_write16_rep(struct tmio_mmc_host *host, int addr,
165 u16 *buf, int count)
166{
167 writesw(host->ctl + (addr << host->bus_shift), buf, count);
168}
169
170static inline void sd_ctrl_write32(struct tmio_mmc_host *host, int addr, u32 val)
171{
172 writew(val, host->ctl + (addr << host->bus_shift));
173 writew(val >> 16, host->ctl + ((addr + 2) << host->bus_shift));
174}
175
176
b6147490 177#endif
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