2 * linux/drivers/mmc/host/tmio_mmc.h
4 * Copyright (C) 2007 Ian Molton
5 * Copyright (C) 2004 Ian Molton
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.
11 * Driver for the MMC / SD / SDIO cell found in:
13 * TC6393XB TC6391XB TC6387XB T7L66XB ASIC3
19 #include <linux/highmem.h>
20 #include <linux/mmc/tmio.h>
21 #include <linux/mutex.h>
22 #include <linux/pagemap.h>
23 #include <linux/spinlock.h>
25 /* Definitions for values the CTRL_SDIO_STATUS register can take. */
26 #define TMIO_SDIO_STAT_IOIRQ 0x0001
27 #define TMIO_SDIO_STAT_EXPUB52 0x4000
28 #define TMIO_SDIO_STAT_EXWT 0x8000
29 #define TMIO_SDIO_MASK_ALL 0xc007
31 /* Define some IRQ masks */
32 /* This is the mask used at reset by the chip */
33 #define TMIO_MASK_ALL 0x837f031d
34 #define TMIO_MASK_READOP (TMIO_STAT_RXRDY | TMIO_STAT_DATAEND)
35 #define TMIO_MASK_WRITEOP (TMIO_STAT_TXRQ | TMIO_STAT_DATAEND)
36 #define TMIO_MASK_CMD (TMIO_STAT_CMDRESPEND | TMIO_STAT_CMDTIMEOUT | \
37 TMIO_STAT_CARD_REMOVE | TMIO_STAT_CARD_INSERT)
38 #define TMIO_MASK_IRQ (TMIO_MASK_READOP | TMIO_MASK_WRITEOP | TMIO_MASK_CMD)
42 struct tmio_mmc_host
{
44 unsigned long bus_shift
;
45 struct mmc_command
*cmd
;
46 struct mmc_request
*mrq
;
47 struct mmc_data
*data
;
49 unsigned int sdio_irq_enabled
;
51 /* Callbacks for clock / power control */
52 void (*set_pwr
)(struct platform_device
*host
, int state
);
53 void (*set_clk_div
)(struct platform_device
*host
, int state
);
56 /* recognise system-wide suspend in runtime PM methods */
59 /* pio related stuff */
60 struct scatterlist
*sg_ptr
;
61 struct scatterlist
*sg_orig
;
65 struct platform_device
*pdev
;
66 struct tmio_mmc_data
*pdata
;
70 struct dma_chan
*chan_rx
;
71 struct dma_chan
*chan_tx
;
72 struct tasklet_struct dma_complete
;
73 struct tasklet_struct dma_issue
;
74 struct scatterlist bounce_sg
;
77 /* Track lost interrupts */
78 struct delayed_work delayed_reset_work
;
79 struct work_struct done
;
81 spinlock_t lock
; /* protect host private data */
82 unsigned long last_req_ts
;
83 struct mutex ios_lock
; /* protect set_ios() context */
86 int tmio_mmc_host_probe(struct tmio_mmc_host
**host
,
87 struct platform_device
*pdev
,
88 struct tmio_mmc_data
*pdata
);
89 void tmio_mmc_host_remove(struct tmio_mmc_host
*host
);
90 void tmio_mmc_do_data_irq(struct tmio_mmc_host
*host
);
92 void tmio_mmc_enable_mmc_irqs(struct tmio_mmc_host
*host
, u32 i
);
93 void tmio_mmc_disable_mmc_irqs(struct tmio_mmc_host
*host
, u32 i
);
94 irqreturn_t
tmio_mmc_irq(int irq
, void *devid
);
96 static inline char *tmio_mmc_kmap_atomic(struct scatterlist
*sg
,
99 local_irq_save(*flags
);
100 return kmap_atomic(sg_page(sg
), KM_BIO_SRC_IRQ
) + sg
->offset
;
103 static inline void tmio_mmc_kunmap_atomic(struct scatterlist
*sg
,
104 unsigned long *flags
, void *virt
)
106 kunmap_atomic(virt
- sg
->offset
, KM_BIO_SRC_IRQ
);
107 local_irq_restore(*flags
);
110 #if defined(CONFIG_MMC_SDHI) || defined(CONFIG_MMC_SDHI_MODULE)
111 void tmio_mmc_start_dma(struct tmio_mmc_host
*host
, struct mmc_data
*data
);
112 void tmio_mmc_enable_dma(struct tmio_mmc_host
*host
, bool enable
);
113 void tmio_mmc_request_dma(struct tmio_mmc_host
*host
, struct tmio_mmc_data
*pdata
);
114 void tmio_mmc_release_dma(struct tmio_mmc_host
*host
);
116 static inline void tmio_mmc_start_dma(struct tmio_mmc_host
*host
,
117 struct mmc_data
*data
)
121 static inline void tmio_mmc_enable_dma(struct tmio_mmc_host
*host
, bool enable
)
125 static inline void tmio_mmc_request_dma(struct tmio_mmc_host
*host
,
126 struct tmio_mmc_data
*pdata
)
128 host
->chan_tx
= NULL
;
129 host
->chan_rx
= NULL
;
132 static inline void tmio_mmc_release_dma(struct tmio_mmc_host
*host
)
138 int tmio_mmc_host_suspend(struct device
*dev
);
139 int tmio_mmc_host_resume(struct device
*dev
);
141 #define tmio_mmc_host_suspend NULL
142 #define tmio_mmc_host_resume NULL
145 int tmio_mmc_host_runtime_suspend(struct device
*dev
);
146 int tmio_mmc_host_runtime_resume(struct device
*dev
);
148 static inline u16
sd_ctrl_read16(struct tmio_mmc_host
*host
, int addr
)
150 return readw(host
->ctl
+ (addr
<< host
->bus_shift
));
153 static inline void sd_ctrl_read16_rep(struct tmio_mmc_host
*host
, int addr
,
156 readsw(host
->ctl
+ (addr
<< host
->bus_shift
), buf
, count
);
159 static inline u32
sd_ctrl_read32(struct tmio_mmc_host
*host
, int addr
)
161 return readw(host
->ctl
+ (addr
<< host
->bus_shift
)) |
162 readw(host
->ctl
+ ((addr
+ 2) << host
->bus_shift
)) << 16;
165 static inline void sd_ctrl_write16(struct tmio_mmc_host
*host
, int addr
, u16 val
)
167 /* If there is a hook and it returns non-zero then there
168 * is an error and the write should be skipped
170 if (host
->pdata
->write16_hook
&& host
->pdata
->write16_hook(host
, addr
))
172 writew(val
, host
->ctl
+ (addr
<< host
->bus_shift
));
175 static inline void sd_ctrl_write16_rep(struct tmio_mmc_host
*host
, int addr
,
178 writesw(host
->ctl
+ (addr
<< host
->bus_shift
), buf
, count
);
181 static inline void sd_ctrl_write32(struct tmio_mmc_host
*host
, int addr
, u32 val
)
183 writew(val
, host
->ctl
+ (addr
<< host
->bus_shift
));
184 writew(val
>> 16, host
->ctl
+ ((addr
+ 2) << host
->bus_shift
));