Loading...
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/scatterlist.h>
24#include <linux/spinlock.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
51 /* Controller power state */
52 bool power;
53
54 /* 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;
78 struct work_struct done;
79
80 /* Cache IRQ mask */
81 u32 sdcard_irq_mask;
82 u32 sdio_irq_mask;
83
84 spinlock_t lock; /* protect host private data */
85 unsigned long last_req_ts;
86 struct mutex ios_lock; /* protect set_ios() context */
87 bool native_hotplug;
88};
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);
98irqreturn_t tmio_mmc_irq(int irq, void *devid);
99irqreturn_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);
102
103static inline char *tmio_mmc_kmap_atomic(struct scatterlist *sg,
104 unsigned long *flags)
105{
106 local_irq_save(*flags);
107 return kmap_atomic(sg_page(sg)) + sg->offset;
108}
109
110static inline void tmio_mmc_kunmap_atomic(struct scatterlist *sg,
111 unsigned long *flags, void *virt)
112{
113 kunmap_atomic(virt - sg->offset);
114 local_irq_restore(*flags);
115}
116
117#if defined(CONFIG_MMC_SDHI) || defined(CONFIG_MMC_SDHI_MODULE)
118void tmio_mmc_start_dma(struct tmio_mmc_host *host, struct mmc_data *data);
119void tmio_mmc_enable_dma(struct tmio_mmc_host *host, bool enable);
120void tmio_mmc_request_dma(struct tmio_mmc_host *host, struct tmio_mmc_data *pdata);
121void tmio_mmc_release_dma(struct tmio_mmc_host *host);
122void tmio_mmc_abort_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
144static inline void tmio_mmc_abort_dma(struct tmio_mmc_host *host)
145{
146}
147#endif
148
149#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
157int tmio_mmc_host_runtime_suspend(struct device *dev);
158int tmio_mmc_host_runtime_resume(struct device *dev);
159
160static 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{
179 /* 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;
184 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
200#endif
1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Driver for the MMC / SD / SDIO cell found in:
4 *
5 * TC6393XB TC6391XB TC6387XB T7L66XB ASIC3
6 *
7 * Copyright (C) 2015-19 Renesas Electronics Corporation
8 * Copyright (C) 2016-19 Sang Engineering, Wolfram Sang
9 * Copyright (C) 2016-17 Horms Solutions, Simon Horman
10 * Copyright (C) 2007 Ian Molton
11 * Copyright (C) 2004 Ian Molton
12 */
13
14#ifndef TMIO_MMC_H
15#define TMIO_MMC_H
16
17#include <linux/dmaengine.h>
18#include <linux/highmem.h>
19#include <linux/mutex.h>
20#include <linux/pagemap.h>
21#include <linux/scatterlist.h>
22#include <linux/spinlock.h>
23#include <linux/interrupt.h>
24#include <linux/workqueue.h>
25
26#define CTL_SD_CMD 0x00
27#define CTL_ARG_REG 0x04
28#define CTL_STOP_INTERNAL_ACTION 0x08
29#define CTL_XFER_BLK_COUNT 0xa
30#define CTL_RESPONSE 0x0c
31/* driver merges STATUS and following STATUS2 */
32#define CTL_STATUS 0x1c
33/* driver merges IRQ_MASK and following IRQ_MASK2 */
34#define CTL_IRQ_MASK 0x20
35#define CTL_SD_CARD_CLK_CTL 0x24
36#define CTL_SD_XFER_LEN 0x26
37#define CTL_SD_MEM_CARD_OPT 0x28
38#define CTL_SD_ERROR_DETAIL_STATUS 0x2c
39#define CTL_SD_DATA_PORT 0x30
40#define CTL_TRANSACTION_CTL 0x34
41#define CTL_SDIO_STATUS 0x36
42#define CTL_SDIO_IRQ_MASK 0x38
43#define CTL_DMA_ENABLE 0xd8
44#define CTL_RESET_SD 0xe0
45#define CTL_VERSION 0xe2
46#define CTL_SDIF_MODE 0xe6 /* only known on R-Car 2+ */
47
48/* Definitions for values the CTL_STOP_INTERNAL_ACTION register can take */
49#define TMIO_STOP_STP BIT(0)
50#define TMIO_STOP_SEC BIT(8)
51
52/* Definitions for values the CTL_STATUS register can take */
53#define TMIO_STAT_CMDRESPEND BIT(0)
54#define TMIO_STAT_DATAEND BIT(2)
55#define TMIO_STAT_CARD_REMOVE BIT(3)
56#define TMIO_STAT_CARD_INSERT BIT(4)
57#define TMIO_STAT_SIGSTATE BIT(5)
58#define TMIO_STAT_WRPROTECT BIT(7)
59#define TMIO_STAT_CARD_REMOVE_A BIT(8)
60#define TMIO_STAT_CARD_INSERT_A BIT(9)
61#define TMIO_STAT_SIGSTATE_A BIT(10)
62
63/* These belong technically to CTL_STATUS2, but the driver merges them */
64#define TMIO_STAT_CMD_IDX_ERR BIT(16)
65#define TMIO_STAT_CRCFAIL BIT(17)
66#define TMIO_STAT_STOPBIT_ERR BIT(18)
67#define TMIO_STAT_DATATIMEOUT BIT(19)
68#define TMIO_STAT_RXOVERFLOW BIT(20)
69#define TMIO_STAT_TXUNDERRUN BIT(21)
70#define TMIO_STAT_CMDTIMEOUT BIT(22)
71#define TMIO_STAT_DAT0 BIT(23) /* only known on R-Car so far */
72#define TMIO_STAT_RXRDY BIT(24)
73#define TMIO_STAT_TXRQ BIT(25)
74#define TMIO_STAT_ALWAYS_SET_27 BIT(27) /* only known on R-Car 2+ so far */
75#define TMIO_STAT_ILL_FUNC BIT(29) /* only when !TMIO_MMC_HAS_IDLE_WAIT */
76#define TMIO_STAT_SCLKDIVEN BIT(29) /* only when TMIO_MMC_HAS_IDLE_WAIT */
77#define TMIO_STAT_CMD_BUSY BIT(30)
78#define TMIO_STAT_ILL_ACCESS BIT(31)
79
80/* Definitions for values the CTL_SD_CARD_CLK_CTL register can take */
81#define CLK_CTL_DIV_MASK 0xff
82#define CLK_CTL_SCLKEN BIT(8)
83
84/* Definitions for values the CTL_SD_MEM_CARD_OPT register can take */
85#define CARD_OPT_TOP_MASK 0xf0
86#define CARD_OPT_TOP_SHIFT 4
87#define CARD_OPT_EXTOP BIT(9) /* first appeared on R-Car Gen3 SDHI */
88#define CARD_OPT_WIDTH8 BIT(13)
89#define CARD_OPT_ALWAYS1 BIT(14)
90#define CARD_OPT_WIDTH BIT(15)
91
92/* Definitions for values the CTL_SDIO_STATUS register can take */
93#define TMIO_SDIO_STAT_IOIRQ 0x0001
94#define TMIO_SDIO_STAT_EXPUB52 0x4000
95#define TMIO_SDIO_STAT_EXWT 0x8000
96#define TMIO_SDIO_MASK_ALL 0xc007
97
98#define TMIO_SDIO_SETBITS_MASK 0x0006
99
100/* Definitions for values the CTL_DMA_ENABLE register can take */
101#define DMA_ENABLE_DMASDRW BIT(1)
102
103/* Definitions for values the CTL_SDIF_MODE register can take */
104#define SDIF_MODE_HS400 BIT(0) /* only known on R-Car 2+ */
105
106/* Define some IRQ masks */
107/* This is the mask used at reset by the chip */
108#define TMIO_MASK_ALL 0x837f031d
109#define TMIO_MASK_ALL_RCAR2 0x8b7f031d
110#define TMIO_MASK_READOP (TMIO_STAT_RXRDY | TMIO_STAT_DATAEND)
111#define TMIO_MASK_WRITEOP (TMIO_STAT_TXRQ | TMIO_STAT_DATAEND)
112#define TMIO_MASK_CMD (TMIO_STAT_CMDRESPEND | TMIO_STAT_CMDTIMEOUT | \
113 TMIO_STAT_CARD_REMOVE | TMIO_STAT_CARD_INSERT)
114#define TMIO_MASK_IRQ (TMIO_MASK_READOP | TMIO_MASK_WRITEOP | TMIO_MASK_CMD)
115
116#define TMIO_MAX_BLK_SIZE 512
117
118struct tmio_mmc_data;
119struct tmio_mmc_host;
120
121struct tmio_mmc_dma_ops {
122 void (*start)(struct tmio_mmc_host *host, struct mmc_data *data);
123 void (*enable)(struct tmio_mmc_host *host, bool enable);
124 void (*request)(struct tmio_mmc_host *host,
125 struct tmio_mmc_data *pdata);
126 void (*release)(struct tmio_mmc_host *host);
127 void (*abort)(struct tmio_mmc_host *host);
128 void (*dataend)(struct tmio_mmc_host *host);
129
130 /* optional */
131 void (*end)(struct tmio_mmc_host *host); /* held host->lock */
132 bool (*dma_irq)(struct tmio_mmc_host *host);
133};
134
135struct tmio_mmc_host {
136 void __iomem *ctl;
137 struct mmc_command *cmd;
138 struct mmc_request *mrq;
139 struct mmc_data *data;
140 struct mmc_host *mmc;
141 struct mmc_host_ops ops;
142
143 /* pio related stuff */
144 struct scatterlist *sg_ptr;
145 struct scatterlist *sg_orig;
146 unsigned int sg_len;
147 unsigned int sg_off;
148 unsigned int bus_shift;
149
150 struct platform_device *pdev;
151 struct tmio_mmc_data *pdata;
152
153 /* DMA support */
154 bool dma_on;
155 struct dma_chan *chan_rx;
156 struct dma_chan *chan_tx;
157 struct work_struct dma_issue;
158 struct scatterlist bounce_sg;
159 u8 *bounce_buf;
160
161 /* Track lost interrupts */
162 struct delayed_work delayed_reset_work;
163 struct work_struct done;
164
165 /* Cache */
166 u32 sdcard_irq_mask;
167 u32 sdio_irq_mask;
168 unsigned int clk_cache;
169 u32 sdcard_irq_setbit_mask;
170 u32 sdcard_irq_mask_all;
171
172 spinlock_t lock; /* protect host private data */
173 unsigned long last_req_ts;
174 struct mutex ios_lock; /* protect set_ios() context */
175 bool native_hotplug;
176 bool sdio_irq_enabled;
177
178 /* Mandatory callback */
179 int (*clk_enable)(struct tmio_mmc_host *host);
180 void (*set_clock)(struct tmio_mmc_host *host, unsigned int clock);
181
182 /* Optional callbacks */
183 void (*clk_disable)(struct tmio_mmc_host *host);
184 int (*multi_io_quirk)(struct mmc_card *card,
185 unsigned int direction, int blk_size);
186 int (*write16_hook)(struct tmio_mmc_host *host, int addr);
187 void (*reset)(struct tmio_mmc_host *host, bool preserve);
188 bool (*check_retune)(struct tmio_mmc_host *host, struct mmc_request *mrq);
189 void (*fixup_request)(struct tmio_mmc_host *host, struct mmc_request *mrq);
190 unsigned int (*get_timeout_cycles)(struct tmio_mmc_host *host);
191
192 const struct tmio_mmc_dma_ops *dma_ops;
193};
194
195struct tmio_mmc_host *tmio_mmc_host_alloc(struct platform_device *pdev,
196 struct tmio_mmc_data *pdata);
197void tmio_mmc_host_free(struct tmio_mmc_host *host);
198int tmio_mmc_host_probe(struct tmio_mmc_host *host);
199void tmio_mmc_host_remove(struct tmio_mmc_host *host);
200void tmio_mmc_do_data_irq(struct tmio_mmc_host *host);
201
202void tmio_mmc_enable_mmc_irqs(struct tmio_mmc_host *host, u32 i);
203void tmio_mmc_disable_mmc_irqs(struct tmio_mmc_host *host, u32 i);
204irqreturn_t tmio_mmc_irq(int irq, void *devid);
205
206#ifdef CONFIG_PM
207int tmio_mmc_host_runtime_suspend(struct device *dev);
208int tmio_mmc_host_runtime_resume(struct device *dev);
209#endif
210
211static inline u16 sd_ctrl_read16(struct tmio_mmc_host *host, int addr)
212{
213 return ioread16(host->ctl + (addr << host->bus_shift));
214}
215
216static inline void sd_ctrl_read16_rep(struct tmio_mmc_host *host, int addr,
217 u16 *buf, int count)
218{
219 ioread16_rep(host->ctl + (addr << host->bus_shift), buf, count);
220}
221
222static inline u32 sd_ctrl_read16_and_16_as_32(struct tmio_mmc_host *host,
223 int addr)
224{
225 return ioread16(host->ctl + (addr << host->bus_shift)) |
226 ioread16(host->ctl + ((addr + 2) << host->bus_shift)) << 16;
227}
228
229static inline void sd_ctrl_read32_rep(struct tmio_mmc_host *host, int addr,
230 u32 *buf, int count)
231{
232 ioread32_rep(host->ctl + (addr << host->bus_shift), buf, count);
233}
234
235static inline void sd_ctrl_write16(struct tmio_mmc_host *host, int addr,
236 u16 val)
237{
238 /* If there is a hook and it returns non-zero then there
239 * is an error and the write should be skipped
240 */
241 if (host->write16_hook && host->write16_hook(host, addr))
242 return;
243 iowrite16(val, host->ctl + (addr << host->bus_shift));
244}
245
246static inline void sd_ctrl_write16_rep(struct tmio_mmc_host *host, int addr,
247 u16 *buf, int count)
248{
249 iowrite16_rep(host->ctl + (addr << host->bus_shift), buf, count);
250}
251
252static inline void sd_ctrl_write32_as_16_and_16(struct tmio_mmc_host *host,
253 int addr, u32 val)
254{
255 if (addr == CTL_IRQ_MASK || addr == CTL_STATUS)
256 val |= host->sdcard_irq_setbit_mask;
257
258 iowrite16(val & 0xffff, host->ctl + (addr << host->bus_shift));
259 iowrite16(val >> 16, host->ctl + ((addr + 2) << host->bus_shift));
260}
261
262static inline void sd_ctrl_write32(struct tmio_mmc_host *host, int addr, u32 val)
263{
264 iowrite32(val, host->ctl + (addr << host->bus_shift));
265}
266
267static inline void sd_ctrl_write32_rep(struct tmio_mmc_host *host, int addr,
268 const u32 *buf, int count)
269{
270 iowrite32_rep(host->ctl + (addr << host->bus_shift), buf, count);
271}
272
273#endif