Loading...
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
25#define CTL_SD_CMD 0x00
26#define CTL_ARG_REG 0x04
27#define CTL_STOP_INTERNAL_ACTION 0x08
28#define CTL_XFER_BLK_COUNT 0xa
29#define CTL_RESPONSE 0x0c
30/* driver merges STATUS and following STATUS2 */
31#define CTL_STATUS 0x1c
32/* driver merges IRQ_MASK and following IRQ_MASK2 */
33#define CTL_IRQ_MASK 0x20
34#define CTL_SD_CARD_CLK_CTL 0x24
35#define CTL_SD_XFER_LEN 0x26
36#define CTL_SD_MEM_CARD_OPT 0x28
37#define CTL_SD_ERROR_DETAIL_STATUS 0x2c
38#define CTL_SD_DATA_PORT 0x30
39#define CTL_TRANSACTION_CTL 0x34
40#define CTL_SDIO_STATUS 0x36
41#define CTL_SDIO_IRQ_MASK 0x38
42#define CTL_DMA_ENABLE 0xd8
43#define CTL_RESET_SD 0xe0
44#define CTL_VERSION 0xe2
45#define CTL_SDIF_MODE 0xe6 /* only known on R-Car 2+ */
46
47/* Definitions for values the CTL_STOP_INTERNAL_ACTION register can take */
48#define TMIO_STOP_STP BIT(0)
49#define TMIO_STOP_SEC BIT(8)
50
51/* Definitions for values the CTL_STATUS register can take */
52#define TMIO_STAT_CMDRESPEND BIT(0)
53#define TMIO_STAT_DATAEND BIT(2)
54#define TMIO_STAT_CARD_REMOVE BIT(3)
55#define TMIO_STAT_CARD_INSERT BIT(4)
56#define TMIO_STAT_SIGSTATE BIT(5)
57#define TMIO_STAT_WRPROTECT BIT(7)
58#define TMIO_STAT_CARD_REMOVE_A BIT(8)
59#define TMIO_STAT_CARD_INSERT_A BIT(9)
60#define TMIO_STAT_SIGSTATE_A BIT(10)
61
62/* These belong technically to CTL_STATUS2, but the driver merges them */
63#define TMIO_STAT_CMD_IDX_ERR BIT(16)
64#define TMIO_STAT_CRCFAIL BIT(17)
65#define TMIO_STAT_STOPBIT_ERR BIT(18)
66#define TMIO_STAT_DATATIMEOUT BIT(19)
67#define TMIO_STAT_RXOVERFLOW BIT(20)
68#define TMIO_STAT_TXUNDERRUN BIT(21)
69#define TMIO_STAT_CMDTIMEOUT BIT(22)
70#define TMIO_STAT_DAT0 BIT(23) /* only known on R-Car so far */
71#define TMIO_STAT_RXRDY BIT(24)
72#define TMIO_STAT_TXRQ BIT(25)
73#define TMIO_STAT_ALWAYS_SET_27 BIT(27) /* only known on R-Car 2+ so far */
74#define TMIO_STAT_ILL_FUNC BIT(29) /* only when !TMIO_MMC_HAS_IDLE_WAIT */
75#define TMIO_STAT_SCLKDIVEN BIT(29) /* only when TMIO_MMC_HAS_IDLE_WAIT */
76#define TMIO_STAT_CMD_BUSY BIT(30)
77#define TMIO_STAT_ILL_ACCESS BIT(31)
78
79/* Definitions for values the CTL_SD_CARD_CLK_CTL register can take */
80#define CLK_CTL_DIV_MASK 0xff
81#define CLK_CTL_SCLKEN BIT(8)
82
83/* Definitions for values the CTL_SD_MEM_CARD_OPT register can take */
84#define CARD_OPT_TOP_MASK 0xf0
85#define CARD_OPT_TOP_SHIFT 4
86#define CARD_OPT_EXTOP BIT(9) /* first appeared on R-Car Gen3 SDHI */
87#define CARD_OPT_WIDTH8 BIT(13)
88#define CARD_OPT_ALWAYS1 BIT(14)
89#define CARD_OPT_WIDTH BIT(15)
90
91/* Definitions for values the CTL_SDIO_STATUS register can take */
92#define TMIO_SDIO_STAT_IOIRQ 0x0001
93#define TMIO_SDIO_STAT_EXPUB52 0x4000
94#define TMIO_SDIO_STAT_EXWT 0x8000
95#define TMIO_SDIO_MASK_ALL 0xc007
96
97#define TMIO_SDIO_SETBITS_MASK 0x0006
98
99/* Definitions for values the CTL_DMA_ENABLE register can take */
100#define DMA_ENABLE_DMASDRW BIT(1)
101
102/* Definitions for values the CTL_SDIF_MODE register can take */
103#define SDIF_MODE_HS400 BIT(0) /* only known on R-Car 2+ */
104
105/* Define some IRQ masks */
106/* This is the mask used at reset by the chip */
107#define TMIO_MASK_ALL 0x837f031d
108#define TMIO_MASK_ALL_RCAR2 0x8b7f031d
109#define TMIO_MASK_READOP (TMIO_STAT_RXRDY | TMIO_STAT_DATAEND)
110#define TMIO_MASK_WRITEOP (TMIO_STAT_TXRQ | TMIO_STAT_DATAEND)
111#define TMIO_MASK_CMD (TMIO_STAT_CMDRESPEND | TMIO_STAT_CMDTIMEOUT | \
112 TMIO_STAT_CARD_REMOVE | TMIO_STAT_CARD_INSERT)
113#define TMIO_MASK_IRQ (TMIO_MASK_READOP | TMIO_MASK_WRITEOP | TMIO_MASK_CMD)
114
115#define TMIO_MAX_BLK_SIZE 512
116
117struct tmio_mmc_data;
118struct tmio_mmc_host;
119
120struct tmio_mmc_dma_ops {
121 void (*start)(struct tmio_mmc_host *host, struct mmc_data *data);
122 void (*enable)(struct tmio_mmc_host *host, bool enable);
123 void (*request)(struct tmio_mmc_host *host,
124 struct tmio_mmc_data *pdata);
125 void (*release)(struct tmio_mmc_host *host);
126 void (*abort)(struct tmio_mmc_host *host);
127 void (*dataend)(struct tmio_mmc_host *host);
128
129 /* optional */
130 void (*end)(struct tmio_mmc_host *host); /* held host->lock */
131 bool (*dma_irq)(struct tmio_mmc_host *host);
132};
133
134struct tmio_mmc_host {
135 void __iomem *ctl;
136 struct mmc_command *cmd;
137 struct mmc_request *mrq;
138 struct mmc_data *data;
139 struct mmc_host *mmc;
140 struct mmc_host_ops ops;
141
142 /* Callbacks for clock / power control */
143 void (*set_pwr)(struct platform_device *host, int state);
144
145 /* pio related stuff */
146 struct scatterlist *sg_ptr;
147 struct scatterlist *sg_orig;
148 unsigned int sg_len;
149 unsigned int sg_off;
150 unsigned int bus_shift;
151
152 struct platform_device *pdev;
153 struct tmio_mmc_data *pdata;
154
155 /* DMA support */
156 bool dma_on;
157 struct dma_chan *chan_rx;
158 struct dma_chan *chan_tx;
159 struct tasklet_struct dma_issue;
160 struct scatterlist bounce_sg;
161 u8 *bounce_buf;
162
163 /* Track lost interrupts */
164 struct delayed_work delayed_reset_work;
165 struct work_struct done;
166
167 /* Cache */
168 u32 sdcard_irq_mask;
169 u32 sdio_irq_mask;
170 unsigned int clk_cache;
171 u32 sdcard_irq_setbit_mask;
172 u32 sdcard_irq_mask_all;
173
174 spinlock_t lock; /* protect host private data */
175 unsigned long last_req_ts;
176 struct mutex ios_lock; /* protect set_ios() context */
177 bool native_hotplug;
178 bool sdio_irq_enabled;
179
180 /* Mandatory callback */
181 int (*clk_enable)(struct tmio_mmc_host *host);
182 void (*set_clock)(struct tmio_mmc_host *host, unsigned int clock);
183
184 /* Optional callbacks */
185 void (*clk_disable)(struct tmio_mmc_host *host);
186 int (*multi_io_quirk)(struct mmc_card *card,
187 unsigned int direction, int blk_size);
188 int (*write16_hook)(struct tmio_mmc_host *host, int addr);
189 void (*reset)(struct tmio_mmc_host *host, bool preserve);
190 bool (*check_retune)(struct tmio_mmc_host *host, struct mmc_request *mrq);
191 void (*fixup_request)(struct tmio_mmc_host *host, struct mmc_request *mrq);
192 unsigned int (*get_timeout_cycles)(struct tmio_mmc_host *host);
193
194 const struct tmio_mmc_dma_ops *dma_ops;
195};
196
197struct tmio_mmc_host *tmio_mmc_host_alloc(struct platform_device *pdev,
198 struct tmio_mmc_data *pdata);
199void tmio_mmc_host_free(struct tmio_mmc_host *host);
200int tmio_mmc_host_probe(struct tmio_mmc_host *host);
201void tmio_mmc_host_remove(struct tmio_mmc_host *host);
202void tmio_mmc_do_data_irq(struct tmio_mmc_host *host);
203
204void tmio_mmc_enable_mmc_irqs(struct tmio_mmc_host *host, u32 i);
205void tmio_mmc_disable_mmc_irqs(struct tmio_mmc_host *host, u32 i);
206irqreturn_t tmio_mmc_irq(int irq, void *devid);
207
208#ifdef CONFIG_PM
209int tmio_mmc_host_runtime_suspend(struct device *dev);
210int tmio_mmc_host_runtime_resume(struct device *dev);
211#endif
212
213static inline u16 sd_ctrl_read16(struct tmio_mmc_host *host, int addr)
214{
215 return ioread16(host->ctl + (addr << host->bus_shift));
216}
217
218static inline void sd_ctrl_read16_rep(struct tmio_mmc_host *host, int addr,
219 u16 *buf, int count)
220{
221 ioread16_rep(host->ctl + (addr << host->bus_shift), buf, count);
222}
223
224static inline u32 sd_ctrl_read16_and_16_as_32(struct tmio_mmc_host *host,
225 int addr)
226{
227 return ioread16(host->ctl + (addr << host->bus_shift)) |
228 ioread16(host->ctl + ((addr + 2) << host->bus_shift)) << 16;
229}
230
231static inline void sd_ctrl_read32_rep(struct tmio_mmc_host *host, int addr,
232 u32 *buf, int count)
233{
234 ioread32_rep(host->ctl + (addr << host->bus_shift), buf, count);
235}
236
237static inline void sd_ctrl_write16(struct tmio_mmc_host *host, int addr,
238 u16 val)
239{
240 /* If there is a hook and it returns non-zero then there
241 * is an error and the write should be skipped
242 */
243 if (host->write16_hook && host->write16_hook(host, addr))
244 return;
245 iowrite16(val, host->ctl + (addr << host->bus_shift));
246}
247
248static inline void sd_ctrl_write16_rep(struct tmio_mmc_host *host, int addr,
249 u16 *buf, int count)
250{
251 iowrite16_rep(host->ctl + (addr << host->bus_shift), buf, count);
252}
253
254static inline void sd_ctrl_write32_as_16_and_16(struct tmio_mmc_host *host,
255 int addr, u32 val)
256{
257 if (addr == CTL_IRQ_MASK || addr == CTL_STATUS)
258 val |= host->sdcard_irq_setbit_mask;
259
260 iowrite16(val & 0xffff, host->ctl + (addr << host->bus_shift));
261 iowrite16(val >> 16, host->ctl + ((addr + 2) << host->bus_shift));
262}
263
264static inline void sd_ctrl_write32(struct tmio_mmc_host *host, int addr, u32 val)
265{
266 iowrite32(val, host->ctl + (addr << host->bus_shift));
267}
268
269static inline void sd_ctrl_write32_rep(struct tmio_mmc_host *host, int addr,
270 const u32 *buf, int count)
271{
272 iowrite32_rep(host->ctl + (addr << host->bus_shift), buf, count);
273}
274
275#endif
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/dmaengine.h>
20#include <linux/highmem.h>
21#include <linux/mmc/tmio.h>
22#include <linux/mutex.h>
23#include <linux/pagemap.h>
24#include <linux/scatterlist.h>
25#include <linux/spinlock.h>
26
27/* Definitions for values the CTRL_SDIO_STATUS register can take. */
28#define TMIO_SDIO_STAT_IOIRQ 0x0001
29#define TMIO_SDIO_STAT_EXPUB52 0x4000
30#define TMIO_SDIO_STAT_EXWT 0x8000
31#define TMIO_SDIO_MASK_ALL 0xc007
32
33/* Define some IRQ masks */
34/* This is the mask used at reset by the chip */
35#define TMIO_MASK_ALL 0x837f031d
36#define TMIO_MASK_READOP (TMIO_STAT_RXRDY | TMIO_STAT_DATAEND)
37#define TMIO_MASK_WRITEOP (TMIO_STAT_TXRQ | TMIO_STAT_DATAEND)
38#define TMIO_MASK_CMD (TMIO_STAT_CMDRESPEND | TMIO_STAT_CMDTIMEOUT | \
39 TMIO_STAT_CARD_REMOVE | TMIO_STAT_CARD_INSERT)
40#define TMIO_MASK_IRQ (TMIO_MASK_READOP | TMIO_MASK_WRITEOP | TMIO_MASK_CMD)
41
42struct tmio_mmc_data;
43struct tmio_mmc_host;
44
45struct tmio_mmc_dma {
46 enum dma_slave_buswidth dma_buswidth;
47 bool (*filter)(struct dma_chan *chan, void *arg);
48 void (*enable)(struct tmio_mmc_host *host, bool enable);
49};
50
51struct tmio_mmc_host {
52 void __iomem *ctl;
53 struct mmc_command *cmd;
54 struct mmc_request *mrq;
55 struct mmc_data *data;
56 struct mmc_host *mmc;
57
58 /* Callbacks for clock / power control */
59 void (*set_pwr)(struct platform_device *host, int state);
60 void (*set_clk_div)(struct platform_device *host, int state);
61
62 /* pio related stuff */
63 struct scatterlist *sg_ptr;
64 struct scatterlist *sg_orig;
65 unsigned int sg_len;
66 unsigned int sg_off;
67 unsigned long bus_shift;
68
69 struct platform_device *pdev;
70 struct tmio_mmc_data *pdata;
71 struct tmio_mmc_dma *dma;
72
73 /* DMA support */
74 bool force_pio;
75 struct dma_chan *chan_rx;
76 struct dma_chan *chan_tx;
77 struct tasklet_struct dma_complete;
78 struct tasklet_struct dma_issue;
79 struct scatterlist bounce_sg;
80 u8 *bounce_buf;
81
82 /* Track lost interrupts */
83 struct delayed_work delayed_reset_work;
84 struct work_struct done;
85
86 /* Cache */
87 u32 sdcard_irq_mask;
88 u32 sdio_irq_mask;
89 unsigned int clk_cache;
90
91 spinlock_t lock; /* protect host private data */
92 unsigned long last_req_ts;
93 struct mutex ios_lock; /* protect set_ios() context */
94 bool native_hotplug;
95 bool sdio_irq_enabled;
96
97 int (*write16_hook)(struct tmio_mmc_host *host, int addr);
98 int (*clk_enable)(struct platform_device *pdev, unsigned int *f);
99 void (*clk_disable)(struct platform_device *pdev);
100 int (*multi_io_quirk)(struct mmc_card *card,
101 unsigned int direction, int blk_size);
102};
103
104struct tmio_mmc_host *tmio_mmc_host_alloc(struct platform_device *pdev);
105void tmio_mmc_host_free(struct tmio_mmc_host *host);
106int tmio_mmc_host_probe(struct tmio_mmc_host *host,
107 struct tmio_mmc_data *pdata);
108void tmio_mmc_host_remove(struct tmio_mmc_host *host);
109void tmio_mmc_do_data_irq(struct tmio_mmc_host *host);
110
111void tmio_mmc_enable_mmc_irqs(struct tmio_mmc_host *host, u32 i);
112void tmio_mmc_disable_mmc_irqs(struct tmio_mmc_host *host, u32 i);
113irqreturn_t tmio_mmc_irq(int irq, void *devid);
114irqreturn_t tmio_mmc_sdcard_irq(int irq, void *devid);
115irqreturn_t tmio_mmc_card_detect_irq(int irq, void *devid);
116irqreturn_t tmio_mmc_sdio_irq(int irq, void *devid);
117
118static inline char *tmio_mmc_kmap_atomic(struct scatterlist *sg,
119 unsigned long *flags)
120{
121 local_irq_save(*flags);
122 return kmap_atomic(sg_page(sg)) + sg->offset;
123}
124
125static inline void tmio_mmc_kunmap_atomic(struct scatterlist *sg,
126 unsigned long *flags, void *virt)
127{
128 kunmap_atomic(virt - sg->offset);
129 local_irq_restore(*flags);
130}
131
132#if defined(CONFIG_MMC_SDHI) || defined(CONFIG_MMC_SDHI_MODULE)
133void tmio_mmc_start_dma(struct tmio_mmc_host *host, struct mmc_data *data);
134void tmio_mmc_enable_dma(struct tmio_mmc_host *host, bool enable);
135void tmio_mmc_request_dma(struct tmio_mmc_host *host, struct tmio_mmc_data *pdata);
136void tmio_mmc_release_dma(struct tmio_mmc_host *host);
137void tmio_mmc_abort_dma(struct tmio_mmc_host *host);
138#else
139static inline void tmio_mmc_start_dma(struct tmio_mmc_host *host,
140 struct mmc_data *data)
141{
142}
143
144static inline void tmio_mmc_enable_dma(struct tmio_mmc_host *host, bool enable)
145{
146}
147
148static inline void tmio_mmc_request_dma(struct tmio_mmc_host *host,
149 struct tmio_mmc_data *pdata)
150{
151 host->chan_tx = NULL;
152 host->chan_rx = NULL;
153}
154
155static inline void tmio_mmc_release_dma(struct tmio_mmc_host *host)
156{
157}
158
159static inline void tmio_mmc_abort_dma(struct tmio_mmc_host *host)
160{
161}
162#endif
163
164#ifdef CONFIG_PM
165int tmio_mmc_host_runtime_suspend(struct device *dev);
166int tmio_mmc_host_runtime_resume(struct device *dev);
167#endif
168
169static inline u16 sd_ctrl_read16(struct tmio_mmc_host *host, int addr)
170{
171 return readw(host->ctl + (addr << host->bus_shift));
172}
173
174static inline void sd_ctrl_read16_rep(struct tmio_mmc_host *host, int addr,
175 u16 *buf, int count)
176{
177 readsw(host->ctl + (addr << host->bus_shift), buf, count);
178}
179
180static inline u32 sd_ctrl_read32(struct tmio_mmc_host *host, int addr)
181{
182 return readw(host->ctl + (addr << host->bus_shift)) |
183 readw(host->ctl + ((addr + 2) << host->bus_shift)) << 16;
184}
185
186static inline void sd_ctrl_write16(struct tmio_mmc_host *host, int addr, u16 val)
187{
188 /* If there is a hook and it returns non-zero then there
189 * is an error and the write should be skipped
190 */
191 if (host->write16_hook && host->write16_hook(host, addr))
192 return;
193 writew(val, host->ctl + (addr << host->bus_shift));
194}
195
196static inline void sd_ctrl_write16_rep(struct tmio_mmc_host *host, int addr,
197 u16 *buf, int count)
198{
199 writesw(host->ctl + (addr << host->bus_shift), buf, count);
200}
201
202static inline void sd_ctrl_write32(struct tmio_mmc_host *host, int addr, u32 val)
203{
204 writew(val, host->ctl + (addr << host->bus_shift));
205 writew(val >> 16, host->ctl + ((addr + 2) << host->bus_shift));
206}
207
208
209#endif