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Guennadi Liakhovetskib6147492011-03-23 12:42:44 +01001/*
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>
Simon Hormancba179a2011-03-24 09:48:36 +010020#include <linux/mmc/tmio.h>
Guennadi Liakhovetskib9269fd2011-07-14 12:12:38 +020021#include <linux/mutex.h>
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +010022#include <linux/pagemap.h>
Rafael J. Wysocki6c0cbef2011-07-26 20:50:23 +020023#include <linux/scatterlist.h>
Guennadi Liakhovetskie3de2be2012-01-06 13:06:51 +010024#include <linux/spinlock.h>
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +010025
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +010026/* Definitions for values the CTRL_SDIO_STATUS register can take. */
Simon Hormancba179a2011-03-24 09:48:36 +010027#define TMIO_SDIO_STAT_IOIRQ 0x0001
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +010028#define TMIO_SDIO_STAT_EXPUB52 0x4000
Simon Hormancba179a2011-03-24 09:48:36 +010029#define TMIO_SDIO_STAT_EXWT 0x8000
30#define TMIO_SDIO_MASK_ALL 0xc007
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +010031
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;
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +010050
Guennadi Liakhovetskic391e1b2012-02-09 22:57:13 +010051 /* Controller power state */
52 bool power;
53
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +010054 /* Callbacks for clock / power control */
55 void (*set_pwr)(struct platform_device *host, int state);
56 void (*set_clk_div)(struct platform_device *host, int state);
57
58 /* pio related stuff */
59 struct scatterlist *sg_ptr;
60 struct scatterlist *sg_orig;
61 unsigned int sg_len;
62 unsigned int sg_off;
63
64 struct platform_device *pdev;
65 struct tmio_mmc_data *pdata;
66
67 /* DMA support */
68 bool force_pio;
69 struct dma_chan *chan_rx;
70 struct dma_chan *chan_tx;
71 struct tasklet_struct dma_complete;
72 struct tasklet_struct dma_issue;
73 struct scatterlist bounce_sg;
74 u8 *bounce_buf;
75
76 /* Track lost interrupts */
77 struct delayed_work delayed_reset_work;
Guennadi Liakhovetskib9269fd2011-07-14 12:12:38 +020078 struct work_struct done;
79
Simon Horman54680fe2011-08-25 10:27:25 +090080 /* Cache IRQ mask */
81 u32 sdcard_irq_mask;
82 u32 sdio_irq_mask;
83
Guennadi Liakhovetskib9269fd2011-07-14 12:12:38 +020084 spinlock_t lock; /* protect host private data */
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +010085 unsigned long last_req_ts;
Guennadi Liakhovetskib9269fd2011-07-14 12:12:38 +020086 struct mutex ios_lock; /* protect set_ios() context */
Guennadi Liakhovetski2b1ac5c2012-02-09 22:57:08 +010087 bool native_hotplug;
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +010088};
89
90int tmio_mmc_host_probe(struct tmio_mmc_host **host,
91 struct platform_device *pdev,
92 struct tmio_mmc_data *pdata);
93void tmio_mmc_host_remove(struct tmio_mmc_host *host);
94void tmio_mmc_do_data_irq(struct tmio_mmc_host *host);
95
96void tmio_mmc_enable_mmc_irqs(struct tmio_mmc_host *host, u32 i);
97void tmio_mmc_disable_mmc_irqs(struct tmio_mmc_host *host, u32 i);
Magnus Damm8e7bfdb2011-05-06 11:02:33 +000098irqreturn_t tmio_mmc_irq(int irq, void *devid);
Simon Horman7729c7a2011-08-25 10:27:26 +090099irqreturn_t tmio_mmc_sdcard_irq(int irq, void *devid);
100irqreturn_t tmio_mmc_card_detect_irq(int irq, void *devid);
101irqreturn_t tmio_mmc_sdio_irq(int irq, void *devid);
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100102
103static inline char *tmio_mmc_kmap_atomic(struct scatterlist *sg,
104 unsigned long *flags)
105{
106 local_irq_save(*flags);
Cong Wang482fce92011-11-27 13:27:00 +0800107 return kmap_atomic(sg_page(sg)) + sg->offset;
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100108}
109
110static inline void tmio_mmc_kunmap_atomic(struct scatterlist *sg,
111 unsigned long *flags, void *virt)
112{
Cong Wang482fce92011-11-27 13:27:00 +0800113 kunmap_atomic(virt - sg->offset);
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100114 local_irq_restore(*flags);
115}
116
Guennadi Liakhovetski42051e82011-03-14 09:52:33 +0100117#if defined(CONFIG_MMC_SDHI) || defined(CONFIG_MMC_SDHI_MODULE)
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100118void tmio_mmc_start_dma(struct tmio_mmc_host *host, struct mmc_data *data);
Guennadi Liakhovetski162f43e2011-07-14 18:39:10 +0200119void tmio_mmc_enable_dma(struct tmio_mmc_host *host, bool enable);
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100120void tmio_mmc_request_dma(struct tmio_mmc_host *host, struct tmio_mmc_data *pdata);
121void tmio_mmc_release_dma(struct tmio_mmc_host *host);
Guennadi Liakhovetskie3de2be2012-01-06 13:06:51 +0100122void tmio_mmc_abort_dma(struct tmio_mmc_host *host);
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100123#else
124static inline void tmio_mmc_start_dma(struct tmio_mmc_host *host,
125 struct mmc_data *data)
126{
127}
128
Guennadi Liakhovetski162f43e2011-07-14 18:39:10 +0200129static inline void tmio_mmc_enable_dma(struct tmio_mmc_host *host, bool enable)
130{
131}
132
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100133static 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}
Guennadi Liakhovetskie3de2be2012-01-06 13:06:51 +0100143
144static inline void tmio_mmc_abort_dma(struct tmio_mmc_host *host)
145{
146}
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100147#endif
148
Guennadi Liakhovetskie6ee7182011-05-05 16:13:12 +0000149#ifdef CONFIG_PM
150int tmio_mmc_host_suspend(struct device *dev);
151int tmio_mmc_host_resume(struct device *dev);
152#else
153#define tmio_mmc_host_suspend NULL
154#define tmio_mmc_host_resume NULL
155#endif
156
Guennadi Liakhovetski7311bef2011-05-11 16:51:11 +0000157int tmio_mmc_host_runtime_suspend(struct device *dev);
158int tmio_mmc_host_runtime_resume(struct device *dev);
159
Simon Hormana11862d2011-06-21 08:00:09 +0900160static inline u16 sd_ctrl_read16(struct tmio_mmc_host *host, int addr)
161{
162 return readw(host->ctl + (addr << host->bus_shift));
163}
164
165static inline void sd_ctrl_read16_rep(struct tmio_mmc_host *host, int addr,
166 u16 *buf, int count)
167{
168 readsw(host->ctl + (addr << host->bus_shift), buf, count);
169}
170
171static inline u32 sd_ctrl_read32(struct tmio_mmc_host *host, int addr)
172{
173 return readw(host->ctl + (addr << host->bus_shift)) |
174 readw(host->ctl + ((addr + 2) << host->bus_shift)) << 16;
175}
176
177static inline void sd_ctrl_write16(struct tmio_mmc_host *host, int addr, u16 val)
178{
Simon Horman973ed3a2011-06-21 08:00:10 +0900179 /* If there is a hook and it returns non-zero then there
180 * is an error and the write should be skipped
181 */
182 if (host->pdata->write16_hook && host->pdata->write16_hook(host, addr))
183 return;
Simon Hormana11862d2011-06-21 08:00:09 +0900184 writew(val, host->ctl + (addr << host->bus_shift));
185}
186
187static inline void sd_ctrl_write16_rep(struct tmio_mmc_host *host, int addr,
188 u16 *buf, int count)
189{
190 writesw(host->ctl + (addr << host->bus_shift), buf, count);
191}
192
193static inline void sd_ctrl_write32(struct tmio_mmc_host *host, int addr, u32 val)
194{
195 writew(val, host->ctl + (addr << host->bus_shift));
196 writew(val >> 16, host->ctl + ((addr + 2) << host->bus_shift));
197}
198
199
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100200#endif