tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
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>
20#include <linux/mmc/tmio.h>
21#include <linux/mutex.h>
22#include <linux/pagemap.h>
23#include <linux/spinlock.h>
24#include <linux/scatterlist.h>
25
26/* Definitions for values the CTRL_SDIO_STATUS register can take. */
27#define TMIO_SDIO_STAT_IOIRQ 0x0001
28#define TMIO_SDIO_STAT_EXPUB52 0x4000
29#define TMIO_SDIO_STAT_EXWT 0x8000
30#define TMIO_SDIO_MASK_ALL 0xc007
31
32/* Define some IRQ masks */
33/* This is the mask used at reset by the chip */
34#define TMIO_MASK_ALL 0x837f031d
35#define TMIO_MASK_READOP (TMIO_STAT_RXRDY | TMIO_STAT_DATAEND)
36#define TMIO_MASK_WRITEOP (TMIO_STAT_TXRQ | TMIO_STAT_DATAEND)
37#define TMIO_MASK_CMD (TMIO_STAT_CMDRESPEND | TMIO_STAT_CMDTIMEOUT | \
38 TMIO_STAT_CARD_REMOVE | TMIO_STAT_CARD_INSERT)
39#define TMIO_MASK_IRQ (TMIO_MASK_READOP | TMIO_MASK_WRITEOP | TMIO_MASK_CMD)
40
41struct tmio_mmc_data;
42
43struct tmio_mmc_host {
44 void __iomem *ctl;
45 unsigned long bus_shift;
46 struct mmc_command *cmd;
47 struct mmc_request *mrq;
48 struct mmc_data *data;
49 struct mmc_host *mmc;
50 unsigned int sdio_irq_enabled;
51
52 /* Callbacks for clock / power control */
53 void (*set_pwr)(struct platform_device *host, int state);
54 void (*set_clk_div)(struct platform_device *host, int state);
55
56 int pm_error;
57 /* recognise system-wide suspend in runtime PM methods */
58 bool pm_global;
59
60 /* pio related stuff */
61 struct scatterlist *sg_ptr;
62 struct scatterlist *sg_orig;
63 unsigned int sg_len;
64 unsigned int sg_off;
65
66 struct platform_device *pdev;
67 struct tmio_mmc_data *pdata;
68
69 /* DMA support */
70 bool force_pio;
71 struct dma_chan *chan_rx;
72 struct dma_chan *chan_tx;
73 struct tasklet_struct dma_complete;
74 struct tasklet_struct dma_issue;
75 struct scatterlist bounce_sg;
76 u8 *bounce_buf;
77
78 /* Track lost interrupts */
79 struct delayed_work delayed_reset_work;
80 struct work_struct done;
81
82 /* Cache IRQ mask */
83 u32 sdcard_irq_mask;
84 u32 sdio_irq_mask;
85
86 spinlock_t lock; /* protect host private data */
87 unsigned long last_req_ts;
88 struct mutex ios_lock; /* protect set_ios() context */
89};
90
91int tmio_mmc_host_probe(struct tmio_mmc_host **host,
92 struct platform_device *pdev,
93 struct tmio_mmc_data *pdata);
94void tmio_mmc_host_remove(struct tmio_mmc_host *host);
95void tmio_mmc_do_data_irq(struct tmio_mmc_host *host);
96
97void tmio_mmc_enable_mmc_irqs(struct tmio_mmc_host *host, u32 i);
98void tmio_mmc_disable_mmc_irqs(struct tmio_mmc_host *host, u32 i);
99irqreturn_t tmio_mmc_irq(int irq, void *devid);
100irqreturn_t tmio_mmc_sdcard_irq(int irq, void *devid);
101irqreturn_t tmio_mmc_card_detect_irq(int irq, void *devid);
102irqreturn_t tmio_mmc_sdio_irq(int irq, void *devid);
103
104static inline char *tmio_mmc_kmap_atomic(struct scatterlist *sg,
105 unsigned long *flags)
106{
107 local_irq_save(*flags);
108 return kmap_atomic(sg_page(sg), KM_BIO_SRC_IRQ) + sg->offset;
109}
110
111static inline void tmio_mmc_kunmap_atomic(struct scatterlist *sg,
112 unsigned long *flags, void *virt)
113{
114 kunmap_atomic(virt - sg->offset, KM_BIO_SRC_IRQ);
115 local_irq_restore(*flags);
116}
117
118#if defined(CONFIG_MMC_SDHI) || defined(CONFIG_MMC_SDHI_MODULE)
119void tmio_mmc_start_dma(struct tmio_mmc_host *host, struct mmc_data *data);
120void tmio_mmc_enable_dma(struct tmio_mmc_host *host, bool enable);
121void tmio_mmc_request_dma(struct tmio_mmc_host *host, struct tmio_mmc_data *pdata);
122void tmio_mmc_release_dma(struct tmio_mmc_host *host);
123#else
124static inline void tmio_mmc_start_dma(struct tmio_mmc_host *host,
125 struct mmc_data *data)
126{
127}
128
129static inline void tmio_mmc_enable_dma(struct tmio_mmc_host *host, bool enable)
130{
131}
132
133static inline void tmio_mmc_request_dma(struct tmio_mmc_host *host,
134 struct tmio_mmc_data *pdata)
135{
136 host->chan_tx = NULL;
137 host->chan_rx = NULL;
138}
139
140static inline void tmio_mmc_release_dma(struct tmio_mmc_host *host)
141{
142}
143#endif
144
145#ifdef CONFIG_PM
146int tmio_mmc_host_suspend(struct device *dev);
147int tmio_mmc_host_resume(struct device *dev);
148#else
149#define tmio_mmc_host_suspend NULL
150#define tmio_mmc_host_resume NULL
151#endif
152
153int tmio_mmc_host_runtime_suspend(struct device *dev);
154int tmio_mmc_host_runtime_resume(struct device *dev);
155
156static inline u16 sd_ctrl_read16(struct tmio_mmc_host *host, int addr)
157{
158 return readw(host->ctl + (addr << host->bus_shift));
159}
160
161static inline void sd_ctrl_read16_rep(struct tmio_mmc_host *host, int addr,
162 u16 *buf, int count)
163{
164 readsw(host->ctl + (addr << host->bus_shift), buf, count);
165}
166
167static inline u32 sd_ctrl_read32(struct tmio_mmc_host *host, int addr)
168{
169 return readw(host->ctl + (addr << host->bus_shift)) |
170 readw(host->ctl + ((addr + 2) << host->bus_shift)) << 16;
171}
172
173static inline void sd_ctrl_write16(struct tmio_mmc_host *host, int addr, u16 val)
174{
175 /* If there is a hook and it returns non-zero then there
176 * is an error and the write should be skipped
177 */
178 if (host->pdata->write16_hook && host->pdata->write16_hook(host, addr))
179 return;
180 writew(val, host->ctl + (addr << host->bus_shift));
181}
182
183static inline void sd_ctrl_write16_rep(struct tmio_mmc_host *host, int addr,
184 u16 *buf, int count)
185{
186 writesw(host->ctl + (addr << host->bus_shift), buf, count);
187}
188
189static inline void sd_ctrl_write32(struct tmio_mmc_host *host, int addr, u32 val)
190{
191 writew(val, host->ctl + (addr << host->bus_shift));
192 writew(val >> 16, host->ctl + ((addr + 2) << host->bus_shift));
193}
194
195
196#endif