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3cbcb160 DL |
1 | /* |
2 | * Driver for sunxi SD/MMC host controllers | |
3 | * (C) Copyright 2007-2011 Reuuimlla Technology Co., Ltd. | |
4 | * (C) Copyright 2007-2011 Aaron Maoye <leafy.myeh@reuuimllatech.com> | |
5 | * (C) Copyright 2013-2014 O2S GmbH <www.o2s.ch> | |
1907e386 | 6 | * (C) Copyright 2013-2014 David Lanzendörfer <david.lanzendoerfer@o2s.ch> |
3cbcb160 | 7 | * (C) Copyright 2013-2014 Hans de Goede <hdegoede@redhat.com> |
4fb3ce07 | 8 | * (C) Copyright 2017 Sootech SA |
3cbcb160 DL |
9 | * |
10 | * This program is free software; you can redistribute it and/or | |
11 | * modify it under the terms of the GNU General Public License as | |
12 | * published by the Free Software Foundation; either version 2 of | |
13 | * the License, or (at your option) any later version. | |
14 | */ | |
15 | ||
3cbcb160 | 16 | #include <linux/clk.h> |
ff39e7f7 | 17 | #include <linux/clk/sunxi-ng.h> |
743b819e MR |
18 | #include <linux/delay.h> |
19 | #include <linux/device.h> | |
3cbcb160 | 20 | #include <linux/dma-mapping.h> |
743b819e MR |
21 | #include <linux/err.h> |
22 | #include <linux/gpio.h> | |
23 | #include <linux/interrupt.h> | |
24 | #include <linux/io.h> | |
25 | #include <linux/kernel.h> | |
26 | #include <linux/mmc/card.h> | |
27 | #include <linux/mmc/core.h> | |
3cbcb160 | 28 | #include <linux/mmc/host.h> |
743b819e | 29 | #include <linux/mmc/mmc.h> |
3cbcb160 DL |
30 | #include <linux/mmc/sd.h> |
31 | #include <linux/mmc/sdio.h> | |
3cbcb160 | 32 | #include <linux/mmc/slot-gpio.h> |
743b819e MR |
33 | #include <linux/module.h> |
34 | #include <linux/of_address.h> | |
35 | #include <linux/of_gpio.h> | |
36 | #include <linux/of_platform.h> | |
37 | #include <linux/platform_device.h> | |
9a8e1e8c | 38 | #include <linux/pm_runtime.h> |
743b819e MR |
39 | #include <linux/regulator/consumer.h> |
40 | #include <linux/reset.h> | |
41 | #include <linux/scatterlist.h> | |
42 | #include <linux/slab.h> | |
43 | #include <linux/spinlock.h> | |
3cbcb160 DL |
44 | |
45 | /* register offset definitions */ | |
46 | #define SDXC_REG_GCTRL (0x00) /* SMC Global Control Register */ | |
47 | #define SDXC_REG_CLKCR (0x04) /* SMC Clock Control Register */ | |
48 | #define SDXC_REG_TMOUT (0x08) /* SMC Time Out Register */ | |
49 | #define SDXC_REG_WIDTH (0x0C) /* SMC Bus Width Register */ | |
50 | #define SDXC_REG_BLKSZ (0x10) /* SMC Block Size Register */ | |
51 | #define SDXC_REG_BCNTR (0x14) /* SMC Byte Count Register */ | |
52 | #define SDXC_REG_CMDR (0x18) /* SMC Command Register */ | |
53 | #define SDXC_REG_CARG (0x1C) /* SMC Argument Register */ | |
54 | #define SDXC_REG_RESP0 (0x20) /* SMC Response Register 0 */ | |
55 | #define SDXC_REG_RESP1 (0x24) /* SMC Response Register 1 */ | |
56 | #define SDXC_REG_RESP2 (0x28) /* SMC Response Register 2 */ | |
57 | #define SDXC_REG_RESP3 (0x2C) /* SMC Response Register 3 */ | |
58 | #define SDXC_REG_IMASK (0x30) /* SMC Interrupt Mask Register */ | |
59 | #define SDXC_REG_MISTA (0x34) /* SMC Masked Interrupt Status Register */ | |
60 | #define SDXC_REG_RINTR (0x38) /* SMC Raw Interrupt Status Register */ | |
61 | #define SDXC_REG_STAS (0x3C) /* SMC Status Register */ | |
62 | #define SDXC_REG_FTRGL (0x40) /* SMC FIFO Threshold Watermark Registe */ | |
63 | #define SDXC_REG_FUNS (0x44) /* SMC Function Select Register */ | |
64 | #define SDXC_REG_CBCR (0x48) /* SMC CIU Byte Count Register */ | |
65 | #define SDXC_REG_BBCR (0x4C) /* SMC BIU Byte Count Register */ | |
66 | #define SDXC_REG_DBGC (0x50) /* SMC Debug Enable Register */ | |
67 | #define SDXC_REG_HWRST (0x78) /* SMC Card Hardware Reset for Register */ | |
68 | #define SDXC_REG_DMAC (0x80) /* SMC IDMAC Control Register */ | |
69 | #define SDXC_REG_DLBA (0x84) /* SMC IDMAC Descriptor List Base Addre */ | |
70 | #define SDXC_REG_IDST (0x88) /* SMC IDMAC Status Register */ | |
71 | #define SDXC_REG_IDIE (0x8C) /* SMC IDMAC Interrupt Enable Register */ | |
72 | #define SDXC_REG_CHDA (0x90) | |
73 | #define SDXC_REG_CBDA (0x94) | |
74 | ||
e1b8dfd1 IZ |
75 | /* New registers introduced in A64 */ |
76 | #define SDXC_REG_A12A 0x058 /* SMC Auto Command 12 Register */ | |
77 | #define SDXC_REG_SD_NTSR 0x05C /* SMC New Timing Set Register */ | |
78 | #define SDXC_REG_DRV_DL 0x140 /* Drive Delay Control Register */ | |
79 | #define SDXC_REG_SAMP_DL_REG 0x144 /* SMC sample delay control */ | |
80 | #define SDXC_REG_DS_DL_REG 0x148 /* SMC data strobe delay control */ | |
81 | ||
3cbcb160 DL |
82 | #define mmc_readl(host, reg) \ |
83 | readl((host)->reg_base + SDXC_##reg) | |
84 | #define mmc_writel(host, reg, value) \ | |
85 | writel((value), (host)->reg_base + SDXC_##reg) | |
86 | ||
87 | /* global control register bits */ | |
88 | #define SDXC_SOFT_RESET BIT(0) | |
89 | #define SDXC_FIFO_RESET BIT(1) | |
90 | #define SDXC_DMA_RESET BIT(2) | |
91 | #define SDXC_INTERRUPT_ENABLE_BIT BIT(4) | |
92 | #define SDXC_DMA_ENABLE_BIT BIT(5) | |
93 | #define SDXC_DEBOUNCE_ENABLE_BIT BIT(8) | |
94 | #define SDXC_POSEDGE_LATCH_DATA BIT(9) | |
95 | #define SDXC_DDR_MODE BIT(10) | |
96 | #define SDXC_MEMORY_ACCESS_DONE BIT(29) | |
97 | #define SDXC_ACCESS_DONE_DIRECT BIT(30) | |
98 | #define SDXC_ACCESS_BY_AHB BIT(31) | |
99 | #define SDXC_ACCESS_BY_DMA (0 << 31) | |
100 | #define SDXC_HARDWARE_RESET \ | |
101 | (SDXC_SOFT_RESET | SDXC_FIFO_RESET | SDXC_DMA_RESET) | |
102 | ||
103 | /* clock control bits */ | |
16e821e3 | 104 | #define SDXC_MASK_DATA0 BIT(31) |
3cbcb160 DL |
105 | #define SDXC_CARD_CLOCK_ON BIT(16) |
106 | #define SDXC_LOW_POWER_ON BIT(17) | |
107 | ||
108 | /* bus width */ | |
109 | #define SDXC_WIDTH1 0 | |
110 | #define SDXC_WIDTH4 1 | |
111 | #define SDXC_WIDTH8 2 | |
112 | ||
113 | /* smc command bits */ | |
114 | #define SDXC_RESP_EXPIRE BIT(6) | |
115 | #define SDXC_LONG_RESPONSE BIT(7) | |
116 | #define SDXC_CHECK_RESPONSE_CRC BIT(8) | |
117 | #define SDXC_DATA_EXPIRE BIT(9) | |
118 | #define SDXC_WRITE BIT(10) | |
119 | #define SDXC_SEQUENCE_MODE BIT(11) | |
120 | #define SDXC_SEND_AUTO_STOP BIT(12) | |
121 | #define SDXC_WAIT_PRE_OVER BIT(13) | |
122 | #define SDXC_STOP_ABORT_CMD BIT(14) | |
123 | #define SDXC_SEND_INIT_SEQUENCE BIT(15) | |
124 | #define SDXC_UPCLK_ONLY BIT(21) | |
125 | #define SDXC_READ_CEATA_DEV BIT(22) | |
126 | #define SDXC_CCS_EXPIRE BIT(23) | |
127 | #define SDXC_ENABLE_BIT_BOOT BIT(24) | |
128 | #define SDXC_ALT_BOOT_OPTIONS BIT(25) | |
129 | #define SDXC_BOOT_ACK_EXPIRE BIT(26) | |
130 | #define SDXC_BOOT_ABORT BIT(27) | |
131 | #define SDXC_VOLTAGE_SWITCH BIT(28) | |
132 | #define SDXC_USE_HOLD_REGISTER BIT(29) | |
133 | #define SDXC_START BIT(31) | |
134 | ||
135 | /* interrupt bits */ | |
136 | #define SDXC_RESP_ERROR BIT(1) | |
137 | #define SDXC_COMMAND_DONE BIT(2) | |
138 | #define SDXC_DATA_OVER BIT(3) | |
139 | #define SDXC_TX_DATA_REQUEST BIT(4) | |
140 | #define SDXC_RX_DATA_REQUEST BIT(5) | |
141 | #define SDXC_RESP_CRC_ERROR BIT(6) | |
142 | #define SDXC_DATA_CRC_ERROR BIT(7) | |
143 | #define SDXC_RESP_TIMEOUT BIT(8) | |
144 | #define SDXC_DATA_TIMEOUT BIT(9) | |
145 | #define SDXC_VOLTAGE_CHANGE_DONE BIT(10) | |
146 | #define SDXC_FIFO_RUN_ERROR BIT(11) | |
147 | #define SDXC_HARD_WARE_LOCKED BIT(12) | |
148 | #define SDXC_START_BIT_ERROR BIT(13) | |
149 | #define SDXC_AUTO_COMMAND_DONE BIT(14) | |
150 | #define SDXC_END_BIT_ERROR BIT(15) | |
151 | #define SDXC_SDIO_INTERRUPT BIT(16) | |
152 | #define SDXC_CARD_INSERT BIT(30) | |
153 | #define SDXC_CARD_REMOVE BIT(31) | |
154 | #define SDXC_INTERRUPT_ERROR_BIT \ | |
155 | (SDXC_RESP_ERROR | SDXC_RESP_CRC_ERROR | SDXC_DATA_CRC_ERROR | \ | |
156 | SDXC_RESP_TIMEOUT | SDXC_DATA_TIMEOUT | SDXC_FIFO_RUN_ERROR | \ | |
157 | SDXC_HARD_WARE_LOCKED | SDXC_START_BIT_ERROR | SDXC_END_BIT_ERROR) | |
158 | #define SDXC_INTERRUPT_DONE_BIT \ | |
159 | (SDXC_AUTO_COMMAND_DONE | SDXC_DATA_OVER | \ | |
160 | SDXC_COMMAND_DONE | SDXC_VOLTAGE_CHANGE_DONE) | |
161 | ||
162 | /* status */ | |
163 | #define SDXC_RXWL_FLAG BIT(0) | |
164 | #define SDXC_TXWL_FLAG BIT(1) | |
165 | #define SDXC_FIFO_EMPTY BIT(2) | |
166 | #define SDXC_FIFO_FULL BIT(3) | |
167 | #define SDXC_CARD_PRESENT BIT(8) | |
168 | #define SDXC_CARD_DATA_BUSY BIT(9) | |
169 | #define SDXC_DATA_FSM_BUSY BIT(10) | |
170 | #define SDXC_DMA_REQUEST BIT(31) | |
171 | #define SDXC_FIFO_SIZE 16 | |
172 | ||
173 | /* Function select */ | |
174 | #define SDXC_CEATA_ON (0xceaa << 16) | |
175 | #define SDXC_SEND_IRQ_RESPONSE BIT(0) | |
176 | #define SDXC_SDIO_READ_WAIT BIT(1) | |
177 | #define SDXC_ABORT_READ_DATA BIT(2) | |
178 | #define SDXC_SEND_CCSD BIT(8) | |
179 | #define SDXC_SEND_AUTO_STOPCCSD BIT(9) | |
180 | #define SDXC_CEATA_DEV_IRQ_ENABLE BIT(10) | |
181 | ||
182 | /* IDMA controller bus mod bit field */ | |
183 | #define SDXC_IDMAC_SOFT_RESET BIT(0) | |
184 | #define SDXC_IDMAC_FIX_BURST BIT(1) | |
185 | #define SDXC_IDMAC_IDMA_ON BIT(7) | |
186 | #define SDXC_IDMAC_REFETCH_DES BIT(31) | |
187 | ||
188 | /* IDMA status bit field */ | |
189 | #define SDXC_IDMAC_TRANSMIT_INTERRUPT BIT(0) | |
190 | #define SDXC_IDMAC_RECEIVE_INTERRUPT BIT(1) | |
191 | #define SDXC_IDMAC_FATAL_BUS_ERROR BIT(2) | |
192 | #define SDXC_IDMAC_DESTINATION_INVALID BIT(4) | |
193 | #define SDXC_IDMAC_CARD_ERROR_SUM BIT(5) | |
194 | #define SDXC_IDMAC_NORMAL_INTERRUPT_SUM BIT(8) | |
195 | #define SDXC_IDMAC_ABNORMAL_INTERRUPT_SUM BIT(9) | |
196 | #define SDXC_IDMAC_HOST_ABORT_INTERRUPT BIT(10) | |
197 | #define SDXC_IDMAC_IDLE (0 << 13) | |
198 | #define SDXC_IDMAC_SUSPEND (1 << 13) | |
199 | #define SDXC_IDMAC_DESC_READ (2 << 13) | |
200 | #define SDXC_IDMAC_DESC_CHECK (3 << 13) | |
201 | #define SDXC_IDMAC_READ_REQUEST_WAIT (4 << 13) | |
202 | #define SDXC_IDMAC_WRITE_REQUEST_WAIT (5 << 13) | |
203 | #define SDXC_IDMAC_READ (6 << 13) | |
204 | #define SDXC_IDMAC_WRITE (7 << 13) | |
205 | #define SDXC_IDMAC_DESC_CLOSE (8 << 13) | |
206 | ||
207 | /* | |
208 | * If the idma-des-size-bits of property is ie 13, bufsize bits are: | |
209 | * Bits 0-12: buf1 size | |
210 | * Bits 13-25: buf2 size | |
211 | * Bits 26-31: not used | |
212 | * Since we only ever set buf1 size, we can simply store it directly. | |
213 | */ | |
214 | #define SDXC_IDMAC_DES0_DIC BIT(1) /* disable interrupt on completion */ | |
215 | #define SDXC_IDMAC_DES0_LD BIT(2) /* last descriptor */ | |
216 | #define SDXC_IDMAC_DES0_FD BIT(3) /* first descriptor */ | |
217 | #define SDXC_IDMAC_DES0_CH BIT(4) /* chain mode */ | |
218 | #define SDXC_IDMAC_DES0_ER BIT(5) /* end of ring */ | |
219 | #define SDXC_IDMAC_DES0_CES BIT(30) /* card error summary */ | |
220 | #define SDXC_IDMAC_DES0_OWN BIT(31) /* 1-idma owns it, 0-host owns it */ | |
221 | ||
51424b28 HG |
222 | #define SDXC_CLK_400K 0 |
223 | #define SDXC_CLK_25M 1 | |
224 | #define SDXC_CLK_50M 2 | |
225 | #define SDXC_CLK_50M_DDR 3 | |
2a7aa63a | 226 | #define SDXC_CLK_50M_DDR_8BIT 4 |
51424b28 | 227 | |
e1b8dfd1 IZ |
228 | #define SDXC_2X_TIMING_MODE BIT(31) |
229 | ||
230 | #define SDXC_CAL_START BIT(15) | |
231 | #define SDXC_CAL_DONE BIT(14) | |
232 | #define SDXC_CAL_DL_SHIFT 8 | |
233 | #define SDXC_CAL_DL_SW_EN BIT(7) | |
234 | #define SDXC_CAL_DL_SW_SHIFT 0 | |
235 | #define SDXC_CAL_DL_MASK 0x3f | |
236 | ||
237 | #define SDXC_CAL_TIMEOUT 3 /* in seconds, 3s is enough*/ | |
238 | ||
51424b28 HG |
239 | struct sunxi_mmc_clk_delay { |
240 | u32 output; | |
241 | u32 sample; | |
242 | }; | |
243 | ||
3cbcb160 | 244 | struct sunxi_idma_des { |
2dd110b2 MW |
245 | __le32 config; |
246 | __le32 buf_size; | |
247 | __le32 buf_addr_ptr1; | |
248 | __le32 buf_addr_ptr2; | |
3cbcb160 DL |
249 | }; |
250 | ||
86a93317 HG |
251 | struct sunxi_mmc_cfg { |
252 | u32 idma_des_size_bits; | |
253 | const struct sunxi_mmc_clk_delay *clk_delays; | |
e1b8dfd1 IZ |
254 | |
255 | /* does the IP block support autocalibration? */ | |
256 | bool can_calibrate; | |
9a37e53e | 257 | |
16e821e3 MR |
258 | /* Does DATA0 needs to be masked while the clock is updated */ |
259 | bool mask_data0; | |
260 | ||
ff39e7f7 | 261 | /* hardware only supports new timing mode */ |
9a37e53e | 262 | bool needs_new_timings; |
ff39e7f7 CYT |
263 | |
264 | /* hardware can switch between old and new timing modes */ | |
265 | bool has_timings_switch; | |
86a93317 HG |
266 | }; |
267 | ||
3cbcb160 | 268 | struct sunxi_mmc_host { |
774c0103 | 269 | struct device *dev; |
3cbcb160 DL |
270 | struct mmc_host *mmc; |
271 | struct reset_control *reset; | |
86a93317 | 272 | const struct sunxi_mmc_cfg *cfg; |
3cbcb160 DL |
273 | |
274 | /* IO mapping base */ | |
275 | void __iomem *reg_base; | |
276 | ||
277 | /* clock management */ | |
278 | struct clk *clk_ahb; | |
279 | struct clk *clk_mmc; | |
6c09bb85 MR |
280 | struct clk *clk_sample; |
281 | struct clk *clk_output; | |
3cbcb160 DL |
282 | |
283 | /* irq */ | |
284 | spinlock_t lock; | |
285 | int irq; | |
286 | u32 int_sum; | |
287 | u32 sdio_imask; | |
288 | ||
289 | /* dma */ | |
3cbcb160 DL |
290 | dma_addr_t sg_dma; |
291 | void *sg_cpu; | |
292 | bool wait_dma; | |
293 | ||
294 | struct mmc_request *mrq; | |
295 | struct mmc_request *manual_stop_mrq; | |
296 | int ferror; | |
f771f6e8 CYT |
297 | |
298 | /* vqmmc */ | |
299 | bool vqmmc_enabled; | |
ff39e7f7 CYT |
300 | |
301 | /* timings */ | |
302 | bool use_new_timings; | |
3cbcb160 DL |
303 | }; |
304 | ||
305 | static int sunxi_mmc_reset_host(struct sunxi_mmc_host *host) | |
306 | { | |
307 | unsigned long expire = jiffies + msecs_to_jiffies(250); | |
308 | u32 rval; | |
309 | ||
0f0fcd37 | 310 | mmc_writel(host, REG_GCTRL, SDXC_HARDWARE_RESET); |
3cbcb160 DL |
311 | do { |
312 | rval = mmc_readl(host, REG_GCTRL); | |
313 | } while (time_before(jiffies, expire) && (rval & SDXC_HARDWARE_RESET)); | |
314 | ||
315 | if (rval & SDXC_HARDWARE_RESET) { | |
316 | dev_err(mmc_dev(host->mmc), "fatal err reset timeout\n"); | |
317 | return -EIO; | |
318 | } | |
319 | ||
320 | return 0; | |
321 | } | |
322 | ||
0fc4c61f | 323 | static int sunxi_mmc_init_host(struct sunxi_mmc_host *host) |
3cbcb160 DL |
324 | { |
325 | u32 rval; | |
3cbcb160 DL |
326 | |
327 | if (sunxi_mmc_reset_host(host)) | |
328 | return -EIO; | |
329 | ||
0314cbd4 CYT |
330 | /* |
331 | * Burst 8 transfers, RX trigger level: 7, TX trigger level: 8 | |
332 | * | |
333 | * TODO: sun9i has a larger FIFO and supports higher trigger values | |
334 | */ | |
3cbcb160 | 335 | mmc_writel(host, REG_FTRGL, 0x20070008); |
0314cbd4 | 336 | /* Maximum timeout value */ |
3cbcb160 | 337 | mmc_writel(host, REG_TMOUT, 0xffffffff); |
0314cbd4 | 338 | /* Unmask SDIO interrupt if needed */ |
3cbcb160 | 339 | mmc_writel(host, REG_IMASK, host->sdio_imask); |
0314cbd4 | 340 | /* Clear all pending interrupts */ |
3cbcb160 | 341 | mmc_writel(host, REG_RINTR, 0xffffffff); |
0314cbd4 | 342 | /* Debug register? undocumented */ |
3cbcb160 | 343 | mmc_writel(host, REG_DBGC, 0xdeb); |
0314cbd4 | 344 | /* Enable CEATA support */ |
3cbcb160 | 345 | mmc_writel(host, REG_FUNS, SDXC_CEATA_ON); |
0314cbd4 | 346 | /* Set DMA descriptor list base address */ |
3cbcb160 DL |
347 | mmc_writel(host, REG_DLBA, host->sg_dma); |
348 | ||
349 | rval = mmc_readl(host, REG_GCTRL); | |
350 | rval |= SDXC_INTERRUPT_ENABLE_BIT; | |
0314cbd4 | 351 | /* Undocumented, but found in Allwinner code */ |
3cbcb160 DL |
352 | rval &= ~SDXC_ACCESS_DONE_DIRECT; |
353 | mmc_writel(host, REG_GCTRL, rval); | |
354 | ||
355 | return 0; | |
356 | } | |
357 | ||
358 | static void sunxi_mmc_init_idma_des(struct sunxi_mmc_host *host, | |
359 | struct mmc_data *data) | |
360 | { | |
361 | struct sunxi_idma_des *pdes = (struct sunxi_idma_des *)host->sg_cpu; | |
d34712d2 | 362 | dma_addr_t next_desc = host->sg_dma; |
86a93317 | 363 | int i, max_len = (1 << host->cfg->idma_des_size_bits); |
3cbcb160 DL |
364 | |
365 | for (i = 0; i < data->sg_len; i++) { | |
2dd110b2 MW |
366 | pdes[i].config = cpu_to_le32(SDXC_IDMAC_DES0_CH | |
367 | SDXC_IDMAC_DES0_OWN | | |
368 | SDXC_IDMAC_DES0_DIC); | |
3cbcb160 DL |
369 | |
370 | if (data->sg[i].length == max_len) | |
371 | pdes[i].buf_size = 0; /* 0 == max_len */ | |
372 | else | |
2dd110b2 | 373 | pdes[i].buf_size = cpu_to_le32(data->sg[i].length); |
3cbcb160 | 374 | |
d34712d2 | 375 | next_desc += sizeof(struct sunxi_idma_des); |
2dd110b2 MW |
376 | pdes[i].buf_addr_ptr1 = |
377 | cpu_to_le32(sg_dma_address(&data->sg[i])); | |
378 | pdes[i].buf_addr_ptr2 = cpu_to_le32((u32)next_desc); | |
3cbcb160 DL |
379 | } |
380 | ||
2dd110b2 MW |
381 | pdes[0].config |= cpu_to_le32(SDXC_IDMAC_DES0_FD); |
382 | pdes[i - 1].config |= cpu_to_le32(SDXC_IDMAC_DES0_LD | | |
383 | SDXC_IDMAC_DES0_ER); | |
384 | pdes[i - 1].config &= cpu_to_le32(~SDXC_IDMAC_DES0_DIC); | |
e8a59049 | 385 | pdes[i - 1].buf_addr_ptr2 = 0; |
3cbcb160 DL |
386 | |
387 | /* | |
388 | * Avoid the io-store starting the idmac hitting io-mem before the | |
389 | * descriptors hit the main-mem. | |
390 | */ | |
391 | wmb(); | |
392 | } | |
393 | ||
3cbcb160 DL |
394 | static int sunxi_mmc_map_dma(struct sunxi_mmc_host *host, |
395 | struct mmc_data *data) | |
396 | { | |
397 | u32 i, dma_len; | |
398 | struct scatterlist *sg; | |
399 | ||
400 | dma_len = dma_map_sg(mmc_dev(host->mmc), data->sg, data->sg_len, | |
feeef096 | 401 | mmc_get_dma_dir(data)); |
3cbcb160 DL |
402 | if (dma_len == 0) { |
403 | dev_err(mmc_dev(host->mmc), "dma_map_sg failed\n"); | |
404 | return -ENOMEM; | |
405 | } | |
406 | ||
407 | for_each_sg(data->sg, sg, data->sg_len, i) { | |
408 | if (sg->offset & 3 || sg->length & 3) { | |
409 | dev_err(mmc_dev(host->mmc), | |
410 | "unaligned scatterlist: os %x length %d\n", | |
411 | sg->offset, sg->length); | |
412 | return -EINVAL; | |
413 | } | |
414 | } | |
415 | ||
416 | return 0; | |
417 | } | |
418 | ||
419 | static void sunxi_mmc_start_dma(struct sunxi_mmc_host *host, | |
420 | struct mmc_data *data) | |
421 | { | |
422 | u32 rval; | |
423 | ||
424 | sunxi_mmc_init_idma_des(host, data); | |
425 | ||
426 | rval = mmc_readl(host, REG_GCTRL); | |
427 | rval |= SDXC_DMA_ENABLE_BIT; | |
428 | mmc_writel(host, REG_GCTRL, rval); | |
429 | rval |= SDXC_DMA_RESET; | |
430 | mmc_writel(host, REG_GCTRL, rval); | |
431 | ||
432 | mmc_writel(host, REG_DMAC, SDXC_IDMAC_SOFT_RESET); | |
433 | ||
434 | if (!(data->flags & MMC_DATA_WRITE)) | |
435 | mmc_writel(host, REG_IDIE, SDXC_IDMAC_RECEIVE_INTERRUPT); | |
436 | ||
437 | mmc_writel(host, REG_DMAC, | |
438 | SDXC_IDMAC_FIX_BURST | SDXC_IDMAC_IDMA_ON); | |
439 | } | |
440 | ||
441 | static void sunxi_mmc_send_manual_stop(struct sunxi_mmc_host *host, | |
442 | struct mmc_request *req) | |
443 | { | |
444 | u32 arg, cmd_val, ri; | |
445 | unsigned long expire = jiffies + msecs_to_jiffies(1000); | |
446 | ||
447 | cmd_val = SDXC_START | SDXC_RESP_EXPIRE | | |
448 | SDXC_STOP_ABORT_CMD | SDXC_CHECK_RESPONSE_CRC; | |
449 | ||
450 | if (req->cmd->opcode == SD_IO_RW_EXTENDED) { | |
451 | cmd_val |= SD_IO_RW_DIRECT; | |
452 | arg = (1 << 31) | (0 << 28) | (SDIO_CCCR_ABORT << 9) | | |
453 | ((req->cmd->arg >> 28) & 0x7); | |
454 | } else { | |
455 | cmd_val |= MMC_STOP_TRANSMISSION; | |
456 | arg = 0; | |
457 | } | |
458 | ||
459 | mmc_writel(host, REG_CARG, arg); | |
460 | mmc_writel(host, REG_CMDR, cmd_val); | |
461 | ||
462 | do { | |
463 | ri = mmc_readl(host, REG_RINTR); | |
464 | } while (!(ri & (SDXC_COMMAND_DONE | SDXC_INTERRUPT_ERROR_BIT)) && | |
465 | time_before(jiffies, expire)); | |
466 | ||
467 | if (!(ri & SDXC_COMMAND_DONE) || (ri & SDXC_INTERRUPT_ERROR_BIT)) { | |
468 | dev_err(mmc_dev(host->mmc), "send stop command failed\n"); | |
469 | if (req->stop) | |
470 | req->stop->resp[0] = -ETIMEDOUT; | |
471 | } else { | |
472 | if (req->stop) | |
473 | req->stop->resp[0] = mmc_readl(host, REG_RESP0); | |
474 | } | |
475 | ||
476 | mmc_writel(host, REG_RINTR, 0xffff); | |
477 | } | |
478 | ||
479 | static void sunxi_mmc_dump_errinfo(struct sunxi_mmc_host *host) | |
480 | { | |
481 | struct mmc_command *cmd = host->mrq->cmd; | |
482 | struct mmc_data *data = host->mrq->data; | |
483 | ||
484 | /* For some cmds timeout is normal with sd/mmc cards */ | |
485 | if ((host->int_sum & SDXC_INTERRUPT_ERROR_BIT) == | |
486 | SDXC_RESP_TIMEOUT && (cmd->opcode == SD_IO_SEND_OP_COND || | |
487 | cmd->opcode == SD_IO_RW_DIRECT)) | |
488 | return; | |
489 | ||
bd675698 | 490 | dev_dbg(mmc_dev(host->mmc), |
3cbcb160 DL |
491 | "smc %d err, cmd %d,%s%s%s%s%s%s%s%s%s%s !!\n", |
492 | host->mmc->index, cmd->opcode, | |
493 | data ? (data->flags & MMC_DATA_WRITE ? " WR" : " RD") : "", | |
494 | host->int_sum & SDXC_RESP_ERROR ? " RE" : "", | |
495 | host->int_sum & SDXC_RESP_CRC_ERROR ? " RCE" : "", | |
496 | host->int_sum & SDXC_DATA_CRC_ERROR ? " DCE" : "", | |
497 | host->int_sum & SDXC_RESP_TIMEOUT ? " RTO" : "", | |
498 | host->int_sum & SDXC_DATA_TIMEOUT ? " DTO" : "", | |
499 | host->int_sum & SDXC_FIFO_RUN_ERROR ? " FE" : "", | |
500 | host->int_sum & SDXC_HARD_WARE_LOCKED ? " HL" : "", | |
501 | host->int_sum & SDXC_START_BIT_ERROR ? " SBE" : "", | |
502 | host->int_sum & SDXC_END_BIT_ERROR ? " EBE" : "" | |
503 | ); | |
504 | } | |
505 | ||
506 | /* Called in interrupt context! */ | |
507 | static irqreturn_t sunxi_mmc_finalize_request(struct sunxi_mmc_host *host) | |
508 | { | |
509 | struct mmc_request *mrq = host->mrq; | |
510 | struct mmc_data *data = mrq->data; | |
511 | u32 rval; | |
512 | ||
513 | mmc_writel(host, REG_IMASK, host->sdio_imask); | |
514 | mmc_writel(host, REG_IDIE, 0); | |
515 | ||
516 | if (host->int_sum & SDXC_INTERRUPT_ERROR_BIT) { | |
517 | sunxi_mmc_dump_errinfo(host); | |
518 | mrq->cmd->error = -ETIMEDOUT; | |
519 | ||
520 | if (data) { | |
521 | data->error = -ETIMEDOUT; | |
522 | host->manual_stop_mrq = mrq; | |
523 | } | |
524 | ||
525 | if (mrq->stop) | |
526 | mrq->stop->error = -ETIMEDOUT; | |
527 | } else { | |
528 | if (mrq->cmd->flags & MMC_RSP_136) { | |
529 | mrq->cmd->resp[0] = mmc_readl(host, REG_RESP3); | |
530 | mrq->cmd->resp[1] = mmc_readl(host, REG_RESP2); | |
531 | mrq->cmd->resp[2] = mmc_readl(host, REG_RESP1); | |
532 | mrq->cmd->resp[3] = mmc_readl(host, REG_RESP0); | |
533 | } else { | |
534 | mrq->cmd->resp[0] = mmc_readl(host, REG_RESP0); | |
535 | } | |
536 | ||
537 | if (data) | |
538 | data->bytes_xfered = data->blocks * data->blksz; | |
539 | } | |
540 | ||
541 | if (data) { | |
542 | mmc_writel(host, REG_IDST, 0x337); | |
543 | mmc_writel(host, REG_DMAC, 0); | |
544 | rval = mmc_readl(host, REG_GCTRL); | |
545 | rval |= SDXC_DMA_RESET; | |
546 | mmc_writel(host, REG_GCTRL, rval); | |
547 | rval &= ~SDXC_DMA_ENABLE_BIT; | |
548 | mmc_writel(host, REG_GCTRL, rval); | |
549 | rval |= SDXC_FIFO_RESET; | |
550 | mmc_writel(host, REG_GCTRL, rval); | |
551 | dma_unmap_sg(mmc_dev(host->mmc), data->sg, data->sg_len, | |
feeef096 | 552 | mmc_get_dma_dir(data)); |
3cbcb160 DL |
553 | } |
554 | ||
555 | mmc_writel(host, REG_RINTR, 0xffff); | |
556 | ||
557 | host->mrq = NULL; | |
558 | host->int_sum = 0; | |
559 | host->wait_dma = false; | |
560 | ||
561 | return host->manual_stop_mrq ? IRQ_WAKE_THREAD : IRQ_HANDLED; | |
562 | } | |
563 | ||
564 | static irqreturn_t sunxi_mmc_irq(int irq, void *dev_id) | |
565 | { | |
566 | struct sunxi_mmc_host *host = dev_id; | |
567 | struct mmc_request *mrq; | |
568 | u32 msk_int, idma_int; | |
569 | bool finalize = false; | |
570 | bool sdio_int = false; | |
571 | irqreturn_t ret = IRQ_HANDLED; | |
572 | ||
573 | spin_lock(&host->lock); | |
574 | ||
575 | idma_int = mmc_readl(host, REG_IDST); | |
576 | msk_int = mmc_readl(host, REG_MISTA); | |
577 | ||
578 | dev_dbg(mmc_dev(host->mmc), "irq: rq %p mi %08x idi %08x\n", | |
579 | host->mrq, msk_int, idma_int); | |
580 | ||
581 | mrq = host->mrq; | |
582 | if (mrq) { | |
583 | if (idma_int & SDXC_IDMAC_RECEIVE_INTERRUPT) | |
584 | host->wait_dma = false; | |
585 | ||
586 | host->int_sum |= msk_int; | |
587 | ||
588 | /* Wait for COMMAND_DONE on RESPONSE_TIMEOUT before finalize */ | |
589 | if ((host->int_sum & SDXC_RESP_TIMEOUT) && | |
590 | !(host->int_sum & SDXC_COMMAND_DONE)) | |
591 | mmc_writel(host, REG_IMASK, | |
592 | host->sdio_imask | SDXC_COMMAND_DONE); | |
593 | /* Don't wait for dma on error */ | |
594 | else if (host->int_sum & SDXC_INTERRUPT_ERROR_BIT) | |
595 | finalize = true; | |
596 | else if ((host->int_sum & SDXC_INTERRUPT_DONE_BIT) && | |
597 | !host->wait_dma) | |
598 | finalize = true; | |
599 | } | |
600 | ||
601 | if (msk_int & SDXC_SDIO_INTERRUPT) | |
602 | sdio_int = true; | |
603 | ||
604 | mmc_writel(host, REG_RINTR, msk_int); | |
605 | mmc_writel(host, REG_IDST, idma_int); | |
606 | ||
607 | if (finalize) | |
608 | ret = sunxi_mmc_finalize_request(host); | |
609 | ||
610 | spin_unlock(&host->lock); | |
611 | ||
612 | if (finalize && ret == IRQ_HANDLED) | |
613 | mmc_request_done(host->mmc, mrq); | |
614 | ||
615 | if (sdio_int) | |
616 | mmc_signal_sdio_irq(host->mmc); | |
617 | ||
618 | return ret; | |
619 | } | |
620 | ||
621 | static irqreturn_t sunxi_mmc_handle_manual_stop(int irq, void *dev_id) | |
622 | { | |
623 | struct sunxi_mmc_host *host = dev_id; | |
624 | struct mmc_request *mrq; | |
625 | unsigned long iflags; | |
626 | ||
627 | spin_lock_irqsave(&host->lock, iflags); | |
628 | mrq = host->manual_stop_mrq; | |
629 | spin_unlock_irqrestore(&host->lock, iflags); | |
630 | ||
631 | if (!mrq) { | |
632 | dev_err(mmc_dev(host->mmc), "no request for manual stop\n"); | |
633 | return IRQ_HANDLED; | |
634 | } | |
635 | ||
636 | dev_err(mmc_dev(host->mmc), "data error, sending stop command\n"); | |
dd9b3803 DL |
637 | |
638 | /* | |
639 | * We will never have more than one outstanding request, | |
640 | * and we do not complete the request until after | |
641 | * we've cleared host->manual_stop_mrq so we do not need to | |
642 | * spin lock this function. | |
643 | * Additionally we have wait states within this function | |
644 | * so having it in a lock is a very bad idea. | |
645 | */ | |
3cbcb160 DL |
646 | sunxi_mmc_send_manual_stop(host, mrq); |
647 | ||
648 | spin_lock_irqsave(&host->lock, iflags); | |
649 | host->manual_stop_mrq = NULL; | |
650 | spin_unlock_irqrestore(&host->lock, iflags); | |
651 | ||
652 | mmc_request_done(host->mmc, mrq); | |
653 | ||
654 | return IRQ_HANDLED; | |
655 | } | |
656 | ||
657 | static int sunxi_mmc_oclk_onoff(struct sunxi_mmc_host *host, u32 oclk_en) | |
658 | { | |
7bb9c244 | 659 | unsigned long expire = jiffies + msecs_to_jiffies(750); |
3cbcb160 DL |
660 | u32 rval; |
661 | ||
43c15e96 MR |
662 | dev_dbg(mmc_dev(host->mmc), "%sabling the clock\n", |
663 | oclk_en ? "en" : "dis"); | |
664 | ||
3cbcb160 | 665 | rval = mmc_readl(host, REG_CLKCR); |
16e821e3 | 666 | rval &= ~(SDXC_CARD_CLOCK_ON | SDXC_LOW_POWER_ON | SDXC_MASK_DATA0); |
3cbcb160 DL |
667 | |
668 | if (oclk_en) | |
669 | rval |= SDXC_CARD_CLOCK_ON; | |
16e821e3 MR |
670 | if (host->cfg->mask_data0) |
671 | rval |= SDXC_MASK_DATA0; | |
3cbcb160 DL |
672 | |
673 | mmc_writel(host, REG_CLKCR, rval); | |
674 | ||
675 | rval = SDXC_START | SDXC_UPCLK_ONLY | SDXC_WAIT_PRE_OVER; | |
676 | mmc_writel(host, REG_CMDR, rval); | |
677 | ||
678 | do { | |
679 | rval = mmc_readl(host, REG_CMDR); | |
680 | } while (time_before(jiffies, expire) && (rval & SDXC_START)); | |
681 | ||
682 | /* clear irq status bits set by the command */ | |
683 | mmc_writel(host, REG_RINTR, | |
684 | mmc_readl(host, REG_RINTR) & ~SDXC_SDIO_INTERRUPT); | |
685 | ||
686 | if (rval & SDXC_START) { | |
687 | dev_err(mmc_dev(host->mmc), "fatal err update clk timeout\n"); | |
688 | return -EIO; | |
689 | } | |
690 | ||
16e821e3 MR |
691 | if (host->cfg->mask_data0) { |
692 | rval = mmc_readl(host, REG_CLKCR); | |
693 | mmc_writel(host, REG_CLKCR, rval & ~SDXC_MASK_DATA0); | |
694 | } | |
695 | ||
3cbcb160 DL |
696 | return 0; |
697 | } | |
698 | ||
e1b8dfd1 IZ |
699 | static int sunxi_mmc_calibrate(struct sunxi_mmc_host *host, int reg_off) |
700 | { | |
e1b8dfd1 IZ |
701 | if (!host->cfg->can_calibrate) |
702 | return 0; | |
703 | ||
860fdf89 MR |
704 | /* |
705 | * FIXME: | |
706 | * This is not clear how the calibration is supposed to work | |
707 | * yet. The best rate have been obtained by simply setting the | |
708 | * delay to 0, as Allwinner does in its BSP. | |
709 | * | |
710 | * The only mode that doesn't have such a delay is HS400, that | |
711 | * is in itself a TODO. | |
712 | */ | |
713 | writel(SDXC_CAL_DL_SW_EN, host->reg_base + reg_off); | |
e1b8dfd1 IZ |
714 | |
715 | return 0; | |
716 | } | |
717 | ||
f2cecb70 HG |
718 | static int sunxi_mmc_clk_set_phase(struct sunxi_mmc_host *host, |
719 | struct mmc_ios *ios, u32 rate) | |
720 | { | |
721 | int index; | |
722 | ||
a6461134 | 723 | /* clk controller delays not used under new timings mode */ |
ff39e7f7 | 724 | if (host->use_new_timings) |
b465646e HG |
725 | return 0; |
726 | ||
a6461134 CYT |
727 | /* some old controllers don't support delays */ |
728 | if (!host->cfg->clk_delays) | |
729 | return 0; | |
730 | ||
f2cecb70 HG |
731 | /* determine delays */ |
732 | if (rate <= 400000) { | |
733 | index = SDXC_CLK_400K; | |
734 | } else if (rate <= 25000000) { | |
735 | index = SDXC_CLK_25M; | |
736 | } else if (rate <= 52000000) { | |
737 | if (ios->timing != MMC_TIMING_UHS_DDR50 && | |
738 | ios->timing != MMC_TIMING_MMC_DDR52) { | |
739 | index = SDXC_CLK_50M; | |
740 | } else if (ios->bus_width == MMC_BUS_WIDTH_8) { | |
741 | index = SDXC_CLK_50M_DDR_8BIT; | |
742 | } else { | |
743 | index = SDXC_CLK_50M_DDR; | |
744 | } | |
745 | } else { | |
43c15e96 | 746 | dev_dbg(mmc_dev(host->mmc), "Invalid clock... returning\n"); |
f2cecb70 HG |
747 | return -EINVAL; |
748 | } | |
749 | ||
750 | clk_set_phase(host->clk_sample, host->cfg->clk_delays[index].sample); | |
751 | clk_set_phase(host->clk_output, host->cfg->clk_delays[index].output); | |
752 | ||
753 | return 0; | |
754 | } | |
755 | ||
3cbcb160 DL |
756 | static int sunxi_mmc_clk_set_rate(struct sunxi_mmc_host *host, |
757 | struct mmc_ios *ios) | |
758 | { | |
43c15e96 | 759 | struct mmc_host *mmc = host->mmc; |
63311bec | 760 | long rate; |
c903a2ae | 761 | u32 rval, clock = ios->clock, div = 1; |
3cbcb160 DL |
762 | int ret; |
763 | ||
39cc281f MR |
764 | ret = sunxi_mmc_oclk_onoff(host, 0); |
765 | if (ret) | |
766 | return ret; | |
767 | ||
43c15e96 MR |
768 | /* Our clock is gated now */ |
769 | mmc->actual_clock = 0; | |
770 | ||
9479074e MR |
771 | if (!ios->clock) |
772 | return 0; | |
773 | ||
c903a2ae CYT |
774 | /* |
775 | * Under the old timing mode, 8 bit DDR requires the module | |
776 | * clock to be double the card clock. Under the new timing | |
777 | * mode, all DDR modes require a doubled module clock. | |
778 | * | |
779 | * We currently only support the standard MMC DDR52 mode. | |
780 | * This block should be updated once support for other DDR | |
781 | * modes is added. | |
782 | */ | |
2a7aa63a | 783 | if (ios->timing == MMC_TIMING_MMC_DDR52 && |
c903a2ae CYT |
784 | (host->use_new_timings || |
785 | ios->bus_width == MMC_BUS_WIDTH_8)) { | |
786 | div = 2; | |
2a7aa63a | 787 | clock <<= 1; |
c903a2ae | 788 | } |
2a7aa63a | 789 | |
b939e0b7 | 790 | if (host->use_new_timings && host->cfg->has_timings_switch) { |
ff39e7f7 CYT |
791 | ret = sunxi_ccu_set_mmc_timing_mode(host->clk_mmc, true); |
792 | if (ret) { | |
793 | dev_err(mmc_dev(mmc), | |
794 | "error setting new timing mode\n"); | |
795 | return ret; | |
796 | } | |
797 | } | |
798 | ||
2a7aa63a | 799 | rate = clk_round_rate(host->clk_mmc, clock); |
63311bec | 800 | if (rate < 0) { |
43c15e96 | 801 | dev_err(mmc_dev(mmc), "error rounding clk to %d: %ld\n", |
63311bec JFM |
802 | clock, rate); |
803 | return rate; | |
804 | } | |
43c15e96 | 805 | dev_dbg(mmc_dev(mmc), "setting clk to %d, rounded %ld\n", |
2a7aa63a | 806 | clock, rate); |
3cbcb160 DL |
807 | |
808 | /* setting clock rate */ | |
809 | ret = clk_set_rate(host->clk_mmc, rate); | |
810 | if (ret) { | |
43c15e96 | 811 | dev_err(mmc_dev(mmc), "error setting clk to %ld: %d\n", |
3cbcb160 DL |
812 | rate, ret); |
813 | return ret; | |
814 | } | |
815 | ||
c903a2ae | 816 | /* set internal divider */ |
3cbcb160 DL |
817 | rval = mmc_readl(host, REG_CLKCR); |
818 | rval &= ~0xff; | |
c903a2ae | 819 | rval |= div - 1; |
3cbcb160 DL |
820 | mmc_writel(host, REG_CLKCR, rval); |
821 | ||
082bb85f CYT |
822 | /* update card clock rate to account for internal divider */ |
823 | rate /= div; | |
824 | ||
ff39e7f7 | 825 | if (host->use_new_timings) { |
26cb2be4 CYT |
826 | /* Don't touch the delay bits */ |
827 | rval = mmc_readl(host, REG_SD_NTSR); | |
828 | rval |= SDXC_2X_TIMING_MODE; | |
829 | mmc_writel(host, REG_SD_NTSR, rval); | |
830 | } | |
9a37e53e | 831 | |
082bb85f | 832 | /* sunxi_mmc_clk_set_phase expects the actual card clock rate */ |
f2cecb70 HG |
833 | ret = sunxi_mmc_clk_set_phase(host, ios, rate); |
834 | if (ret) | |
835 | return ret; | |
3cbcb160 | 836 | |
e1b8dfd1 IZ |
837 | ret = sunxi_mmc_calibrate(host, SDXC_REG_SAMP_DL_REG); |
838 | if (ret) | |
839 | return ret; | |
840 | ||
860fdf89 MR |
841 | /* |
842 | * FIXME: | |
843 | * | |
844 | * In HS400 we'll also need to calibrate the data strobe | |
845 | * signal. This should only happen on the MMC2 controller (at | |
846 | * least on the A64). | |
847 | */ | |
e1b8dfd1 | 848 | |
43c15e96 MR |
849 | ret = sunxi_mmc_oclk_onoff(host, 1); |
850 | if (ret) | |
851 | return ret; | |
852 | ||
853 | /* And we just enabled our clock back */ | |
082bb85f | 854 | mmc->actual_clock = rate; |
43c15e96 MR |
855 | |
856 | return 0; | |
3cbcb160 DL |
857 | } |
858 | ||
3f6c808e MR |
859 | static void sunxi_mmc_set_bus_width(struct sunxi_mmc_host *host, |
860 | unsigned char width) | |
861 | { | |
862 | switch (width) { | |
863 | case MMC_BUS_WIDTH_1: | |
864 | mmc_writel(host, REG_WIDTH, SDXC_WIDTH1); | |
865 | break; | |
866 | case MMC_BUS_WIDTH_4: | |
867 | mmc_writel(host, REG_WIDTH, SDXC_WIDTH4); | |
868 | break; | |
869 | case MMC_BUS_WIDTH_8: | |
870 | mmc_writel(host, REG_WIDTH, SDXC_WIDTH8); | |
871 | break; | |
872 | } | |
873 | } | |
874 | ||
ad04d955 MR |
875 | static void sunxi_mmc_set_clk(struct sunxi_mmc_host *host, struct mmc_ios *ios) |
876 | { | |
877 | u32 rval; | |
878 | ||
879 | /* set ddr mode */ | |
880 | rval = mmc_readl(host, REG_GCTRL); | |
881 | if (ios->timing == MMC_TIMING_UHS_DDR50 || | |
882 | ios->timing == MMC_TIMING_MMC_DDR52) | |
883 | rval |= SDXC_DDR_MODE; | |
884 | else | |
885 | rval &= ~SDXC_DDR_MODE; | |
886 | mmc_writel(host, REG_GCTRL, rval); | |
887 | ||
888 | host->ferror = sunxi_mmc_clk_set_rate(host, ios); | |
889 | /* Android code had a usleep_range(50000, 55000); here */ | |
890 | } | |
891 | ||
e27e1f3d MR |
892 | static void sunxi_mmc_card_power(struct sunxi_mmc_host *host, |
893 | struct mmc_ios *ios) | |
3cbcb160 | 894 | { |
e27e1f3d | 895 | struct mmc_host *mmc = host->mmc; |
3cbcb160 | 896 | |
3cbcb160 | 897 | switch (ios->power_mode) { |
3cbcb160 | 898 | case MMC_POWER_UP: |
e27e1f3d MR |
899 | dev_dbg(mmc_dev(mmc), "Powering card up\n"); |
900 | ||
424feb59 MR |
901 | if (!IS_ERR(mmc->supply.vmmc)) { |
902 | host->ferror = mmc_regulator_set_ocr(mmc, | |
903 | mmc->supply.vmmc, | |
904 | ios->vdd); | |
905 | if (host->ferror) | |
906 | return; | |
907 | } | |
3cbcb160 | 908 | |
f771f6e8 CYT |
909 | if (!IS_ERR(mmc->supply.vqmmc)) { |
910 | host->ferror = regulator_enable(mmc->supply.vqmmc); | |
911 | if (host->ferror) { | |
912 | dev_err(mmc_dev(mmc), | |
913 | "failed to enable vqmmc\n"); | |
914 | return; | |
915 | } | |
916 | host->vqmmc_enabled = true; | |
917 | } | |
3cbcb160 DL |
918 | break; |
919 | ||
920 | case MMC_POWER_OFF: | |
e27e1f3d MR |
921 | dev_dbg(mmc_dev(mmc), "Powering card off\n"); |
922 | ||
424feb59 MR |
923 | if (!IS_ERR(mmc->supply.vmmc)) |
924 | mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, 0); | |
925 | ||
f771f6e8 CYT |
926 | if (!IS_ERR(mmc->supply.vqmmc) && host->vqmmc_enabled) |
927 | regulator_disable(mmc->supply.vqmmc); | |
e27e1f3d | 928 | |
f771f6e8 | 929 | host->vqmmc_enabled = false; |
3cbcb160 | 930 | break; |
e27e1f3d MR |
931 | |
932 | default: | |
933 | dev_dbg(mmc_dev(mmc), "Ignoring unknown card power state\n"); | |
934 | break; | |
3cbcb160 | 935 | } |
e27e1f3d MR |
936 | } |
937 | ||
938 | static void sunxi_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) | |
939 | { | |
940 | struct sunxi_mmc_host *host = mmc_priv(mmc); | |
941 | ||
e27e1f3d | 942 | sunxi_mmc_card_power(host, ios); |
3f6c808e | 943 | sunxi_mmc_set_bus_width(host, ios->bus_width); |
ad04d955 | 944 | sunxi_mmc_set_clk(host, ios); |
3cbcb160 DL |
945 | } |
946 | ||
f771f6e8 CYT |
947 | static int sunxi_mmc_volt_switch(struct mmc_host *mmc, struct mmc_ios *ios) |
948 | { | |
949 | /* vqmmc regulator is available */ | |
950 | if (!IS_ERR(mmc->supply.vqmmc)) | |
951 | return mmc_regulator_set_vqmmc(mmc, ios); | |
952 | ||
953 | /* no vqmmc regulator, assume fixed regulator at 3/3.3V */ | |
954 | if (mmc->ios.signal_voltage == MMC_SIGNAL_VOLTAGE_330) | |
955 | return 0; | |
956 | ||
957 | return -EINVAL; | |
958 | } | |
959 | ||
3cbcb160 DL |
960 | static void sunxi_mmc_enable_sdio_irq(struct mmc_host *mmc, int enable) |
961 | { | |
962 | struct sunxi_mmc_host *host = mmc_priv(mmc); | |
963 | unsigned long flags; | |
964 | u32 imask; | |
965 | ||
9a8e1e8c MR |
966 | if (enable) |
967 | pm_runtime_get_noresume(host->dev); | |
968 | ||
3cbcb160 DL |
969 | spin_lock_irqsave(&host->lock, flags); |
970 | ||
971 | imask = mmc_readl(host, REG_IMASK); | |
972 | if (enable) { | |
973 | host->sdio_imask = SDXC_SDIO_INTERRUPT; | |
974 | imask |= SDXC_SDIO_INTERRUPT; | |
975 | } else { | |
976 | host->sdio_imask = 0; | |
977 | imask &= ~SDXC_SDIO_INTERRUPT; | |
978 | } | |
979 | mmc_writel(host, REG_IMASK, imask); | |
980 | spin_unlock_irqrestore(&host->lock, flags); | |
9a8e1e8c MR |
981 | |
982 | if (!enable) | |
983 | pm_runtime_put_noidle(host->mmc->parent); | |
3cbcb160 DL |
984 | } |
985 | ||
986 | static void sunxi_mmc_hw_reset(struct mmc_host *mmc) | |
987 | { | |
988 | struct sunxi_mmc_host *host = mmc_priv(mmc); | |
989 | mmc_writel(host, REG_HWRST, 0); | |
990 | udelay(10); | |
991 | mmc_writel(host, REG_HWRST, 1); | |
992 | udelay(300); | |
993 | } | |
994 | ||
995 | static void sunxi_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq) | |
996 | { | |
997 | struct sunxi_mmc_host *host = mmc_priv(mmc); | |
998 | struct mmc_command *cmd = mrq->cmd; | |
999 | struct mmc_data *data = mrq->data; | |
1000 | unsigned long iflags; | |
1001 | u32 imask = SDXC_INTERRUPT_ERROR_BIT; | |
1002 | u32 cmd_val = SDXC_START | (cmd->opcode & 0x3f); | |
dd9b3803 | 1003 | bool wait_dma = host->wait_dma; |
3cbcb160 DL |
1004 | int ret; |
1005 | ||
1006 | /* Check for set_ios errors (should never happen) */ | |
1007 | if (host->ferror) { | |
1008 | mrq->cmd->error = host->ferror; | |
1009 | mmc_request_done(mmc, mrq); | |
1010 | return; | |
1011 | } | |
1012 | ||
1013 | if (data) { | |
1014 | ret = sunxi_mmc_map_dma(host, data); | |
1015 | if (ret < 0) { | |
1016 | dev_err(mmc_dev(mmc), "map DMA failed\n"); | |
1017 | cmd->error = ret; | |
1018 | data->error = ret; | |
1019 | mmc_request_done(mmc, mrq); | |
1020 | return; | |
1021 | } | |
1022 | } | |
1023 | ||
1024 | if (cmd->opcode == MMC_GO_IDLE_STATE) { | |
1025 | cmd_val |= SDXC_SEND_INIT_SEQUENCE; | |
1026 | imask |= SDXC_COMMAND_DONE; | |
1027 | } | |
1028 | ||
1029 | if (cmd->flags & MMC_RSP_PRESENT) { | |
1030 | cmd_val |= SDXC_RESP_EXPIRE; | |
1031 | if (cmd->flags & MMC_RSP_136) | |
1032 | cmd_val |= SDXC_LONG_RESPONSE; | |
1033 | if (cmd->flags & MMC_RSP_CRC) | |
1034 | cmd_val |= SDXC_CHECK_RESPONSE_CRC; | |
1035 | ||
1036 | if ((cmd->flags & MMC_CMD_MASK) == MMC_CMD_ADTC) { | |
1037 | cmd_val |= SDXC_DATA_EXPIRE | SDXC_WAIT_PRE_OVER; | |
3cbcb160 DL |
1038 | |
1039 | if (cmd->data->stop) { | |
1040 | imask |= SDXC_AUTO_COMMAND_DONE; | |
1041 | cmd_val |= SDXC_SEND_AUTO_STOP; | |
1042 | } else { | |
1043 | imask |= SDXC_DATA_OVER; | |
1044 | } | |
1045 | ||
1046 | if (cmd->data->flags & MMC_DATA_WRITE) | |
1047 | cmd_val |= SDXC_WRITE; | |
1048 | else | |
dd9b3803 | 1049 | wait_dma = true; |
3cbcb160 DL |
1050 | } else { |
1051 | imask |= SDXC_COMMAND_DONE; | |
1052 | } | |
1053 | } else { | |
1054 | imask |= SDXC_COMMAND_DONE; | |
1055 | } | |
1056 | ||
1057 | dev_dbg(mmc_dev(mmc), "cmd %d(%08x) arg %x ie 0x%08x len %d\n", | |
1058 | cmd_val & 0x3f, cmd_val, cmd->arg, imask, | |
1059 | mrq->data ? mrq->data->blksz * mrq->data->blocks : 0); | |
1060 | ||
1061 | spin_lock_irqsave(&host->lock, iflags); | |
1062 | ||
1063 | if (host->mrq || host->manual_stop_mrq) { | |
1064 | spin_unlock_irqrestore(&host->lock, iflags); | |
1065 | ||
1066 | if (data) | |
1067 | dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len, | |
feeef096 | 1068 | mmc_get_dma_dir(data)); |
3cbcb160 DL |
1069 | |
1070 | dev_err(mmc_dev(mmc), "request already pending\n"); | |
1071 | mrq->cmd->error = -EBUSY; | |
1072 | mmc_request_done(mmc, mrq); | |
1073 | return; | |
1074 | } | |
1075 | ||
1076 | if (data) { | |
1077 | mmc_writel(host, REG_BLKSZ, data->blksz); | |
1078 | mmc_writel(host, REG_BCNTR, data->blksz * data->blocks); | |
1079 | sunxi_mmc_start_dma(host, data); | |
1080 | } | |
1081 | ||
1082 | host->mrq = mrq; | |
dd9b3803 | 1083 | host->wait_dma = wait_dma; |
3cbcb160 DL |
1084 | mmc_writel(host, REG_IMASK, host->sdio_imask | imask); |
1085 | mmc_writel(host, REG_CARG, cmd->arg); | |
1086 | mmc_writel(host, REG_CMDR, cmd_val); | |
1087 | ||
1088 | spin_unlock_irqrestore(&host->lock, iflags); | |
1089 | } | |
1090 | ||
c1590dd8 HG |
1091 | static int sunxi_mmc_card_busy(struct mmc_host *mmc) |
1092 | { | |
1093 | struct sunxi_mmc_host *host = mmc_priv(mmc); | |
1094 | ||
1095 | return !!(mmc_readl(host, REG_STAS) & SDXC_CARD_DATA_BUSY); | |
1096 | } | |
1097 | ||
1f8029c3 | 1098 | static const struct mmc_host_ops sunxi_mmc_ops = { |
3cbcb160 DL |
1099 | .request = sunxi_mmc_request, |
1100 | .set_ios = sunxi_mmc_set_ios, | |
1101 | .get_ro = mmc_gpio_get_ro, | |
1102 | .get_cd = mmc_gpio_get_cd, | |
1103 | .enable_sdio_irq = sunxi_mmc_enable_sdio_irq, | |
f771f6e8 | 1104 | .start_signal_voltage_switch = sunxi_mmc_volt_switch, |
3cbcb160 | 1105 | .hw_reset = sunxi_mmc_hw_reset, |
c1590dd8 | 1106 | .card_busy = sunxi_mmc_card_busy, |
3cbcb160 DL |
1107 | }; |
1108 | ||
51424b28 HG |
1109 | static const struct sunxi_mmc_clk_delay sunxi_mmc_clk_delays[] = { |
1110 | [SDXC_CLK_400K] = { .output = 180, .sample = 180 }, | |
1111 | [SDXC_CLK_25M] = { .output = 180, .sample = 75 }, | |
1112 | [SDXC_CLK_50M] = { .output = 90, .sample = 120 }, | |
1113 | [SDXC_CLK_50M_DDR] = { .output = 60, .sample = 120 }, | |
2a7aa63a CYT |
1114 | /* Value from A83T "new timing mode". Works but might not be right. */ |
1115 | [SDXC_CLK_50M_DDR_8BIT] = { .output = 90, .sample = 180 }, | |
51424b28 HG |
1116 | }; |
1117 | ||
1118 | static const struct sunxi_mmc_clk_delay sun9i_mmc_clk_delays[] = { | |
1119 | [SDXC_CLK_400K] = { .output = 180, .sample = 180 }, | |
1120 | [SDXC_CLK_25M] = { .output = 180, .sample = 75 }, | |
1121 | [SDXC_CLK_50M] = { .output = 150, .sample = 120 }, | |
0175249e CYT |
1122 | [SDXC_CLK_50M_DDR] = { .output = 54, .sample = 36 }, |
1123 | [SDXC_CLK_50M_DDR_8BIT] = { .output = 72, .sample = 72 }, | |
51424b28 HG |
1124 | }; |
1125 | ||
86a93317 HG |
1126 | static const struct sunxi_mmc_cfg sun4i_a10_cfg = { |
1127 | .idma_des_size_bits = 13, | |
b465646e | 1128 | .clk_delays = NULL, |
e1b8dfd1 | 1129 | .can_calibrate = false, |
86a93317 HG |
1130 | }; |
1131 | ||
1132 | static const struct sunxi_mmc_cfg sun5i_a13_cfg = { | |
b465646e HG |
1133 | .idma_des_size_bits = 16, |
1134 | .clk_delays = NULL, | |
e1b8dfd1 | 1135 | .can_calibrate = false, |
b465646e HG |
1136 | }; |
1137 | ||
1138 | static const struct sunxi_mmc_cfg sun7i_a20_cfg = { | |
86a93317 HG |
1139 | .idma_des_size_bits = 16, |
1140 | .clk_delays = sunxi_mmc_clk_delays, | |
e1b8dfd1 | 1141 | .can_calibrate = false, |
86a93317 HG |
1142 | }; |
1143 | ||
ac98caef CYT |
1144 | static const struct sunxi_mmc_cfg sun8i_a83t_emmc_cfg = { |
1145 | .idma_des_size_bits = 16, | |
1146 | .clk_delays = sunxi_mmc_clk_delays, | |
1147 | .can_calibrate = false, | |
1148 | .has_timings_switch = true, | |
1149 | }; | |
1150 | ||
86a93317 HG |
1151 | static const struct sunxi_mmc_cfg sun9i_a80_cfg = { |
1152 | .idma_des_size_bits = 16, | |
1153 | .clk_delays = sun9i_mmc_clk_delays, | |
e1b8dfd1 IZ |
1154 | .can_calibrate = false, |
1155 | }; | |
1156 | ||
1157 | static const struct sunxi_mmc_cfg sun50i_a64_cfg = { | |
1158 | .idma_des_size_bits = 16, | |
1159 | .clk_delays = NULL, | |
1160 | .can_calibrate = true, | |
16e821e3 | 1161 | .mask_data0 = true, |
9a37e53e | 1162 | .needs_new_timings = true, |
86a93317 HG |
1163 | }; |
1164 | ||
4fb3ce07 MR |
1165 | static const struct sunxi_mmc_cfg sun50i_a64_emmc_cfg = { |
1166 | .idma_des_size_bits = 13, | |
1167 | .clk_delays = NULL, | |
1168 | .can_calibrate = true, | |
1169 | }; | |
1170 | ||
86a93317 HG |
1171 | static const struct of_device_id sunxi_mmc_of_match[] = { |
1172 | { .compatible = "allwinner,sun4i-a10-mmc", .data = &sun4i_a10_cfg }, | |
1173 | { .compatible = "allwinner,sun5i-a13-mmc", .data = &sun5i_a13_cfg }, | |
b465646e | 1174 | { .compatible = "allwinner,sun7i-a20-mmc", .data = &sun7i_a20_cfg }, |
ac98caef | 1175 | { .compatible = "allwinner,sun8i-a83t-emmc", .data = &sun8i_a83t_emmc_cfg }, |
86a93317 | 1176 | { .compatible = "allwinner,sun9i-a80-mmc", .data = &sun9i_a80_cfg }, |
e1b8dfd1 | 1177 | { .compatible = "allwinner,sun50i-a64-mmc", .data = &sun50i_a64_cfg }, |
4fb3ce07 | 1178 | { .compatible = "allwinner,sun50i-a64-emmc", .data = &sun50i_a64_emmc_cfg }, |
86a93317 HG |
1179 | { /* sentinel */ } |
1180 | }; | |
1181 | MODULE_DEVICE_TABLE(of, sunxi_mmc_of_match); | |
1182 | ||
774c0103 MR |
1183 | static int sunxi_mmc_enable(struct sunxi_mmc_host *host) |
1184 | { | |
1185 | int ret; | |
1186 | ||
d8181941 MR |
1187 | if (!IS_ERR(host->reset)) { |
1188 | ret = reset_control_reset(host->reset); | |
1189 | if (ret) { | |
1190 | dev_err(host->dev, "Couldn't reset the MMC controller (%d)\n", | |
1191 | ret); | |
1192 | return ret; | |
1193 | } | |
1194 | } | |
1195 | ||
774c0103 MR |
1196 | ret = clk_prepare_enable(host->clk_ahb); |
1197 | if (ret) { | |
d8181941 MR |
1198 | dev_err(host->dev, "Couldn't enable the bus clocks (%d)\n", ret); |
1199 | goto error_assert_reset; | |
774c0103 MR |
1200 | } |
1201 | ||
1202 | ret = clk_prepare_enable(host->clk_mmc); | |
1203 | if (ret) { | |
1204 | dev_err(host->dev, "Enable mmc clk err %d\n", ret); | |
1205 | goto error_disable_clk_ahb; | |
1206 | } | |
1207 | ||
1208 | ret = clk_prepare_enable(host->clk_output); | |
1209 | if (ret) { | |
1210 | dev_err(host->dev, "Enable output clk err %d\n", ret); | |
1211 | goto error_disable_clk_mmc; | |
1212 | } | |
1213 | ||
1214 | ret = clk_prepare_enable(host->clk_sample); | |
1215 | if (ret) { | |
1216 | dev_err(host->dev, "Enable sample clk err %d\n", ret); | |
1217 | goto error_disable_clk_output; | |
1218 | } | |
1219 | ||
774c0103 MR |
1220 | /* |
1221 | * Sometimes the controller asserts the irq on boot for some reason, | |
1222 | * make sure the controller is in a sane state before enabling irqs. | |
1223 | */ | |
1224 | ret = sunxi_mmc_reset_host(host); | |
1225 | if (ret) | |
d8181941 | 1226 | goto error_disable_clk_sample; |
774c0103 MR |
1227 | |
1228 | return 0; | |
1229 | ||
774c0103 MR |
1230 | error_disable_clk_sample: |
1231 | clk_disable_unprepare(host->clk_sample); | |
1232 | error_disable_clk_output: | |
1233 | clk_disable_unprepare(host->clk_output); | |
1234 | error_disable_clk_mmc: | |
1235 | clk_disable_unprepare(host->clk_mmc); | |
1236 | error_disable_clk_ahb: | |
1237 | clk_disable_unprepare(host->clk_ahb); | |
d8181941 MR |
1238 | error_assert_reset: |
1239 | if (!IS_ERR(host->reset)) | |
1240 | reset_control_assert(host->reset); | |
774c0103 MR |
1241 | return ret; |
1242 | } | |
1243 | ||
1244 | static void sunxi_mmc_disable(struct sunxi_mmc_host *host) | |
1245 | { | |
1246 | sunxi_mmc_reset_host(host); | |
1247 | ||
774c0103 MR |
1248 | clk_disable_unprepare(host->clk_sample); |
1249 | clk_disable_unprepare(host->clk_output); | |
1250 | clk_disable_unprepare(host->clk_mmc); | |
1251 | clk_disable_unprepare(host->clk_ahb); | |
d8181941 MR |
1252 | |
1253 | if (!IS_ERR(host->reset)) | |
1254 | reset_control_assert(host->reset); | |
774c0103 MR |
1255 | } |
1256 | ||
3cbcb160 DL |
1257 | static int sunxi_mmc_resource_request(struct sunxi_mmc_host *host, |
1258 | struct platform_device *pdev) | |
1259 | { | |
3cbcb160 DL |
1260 | int ret; |
1261 | ||
86a93317 HG |
1262 | host->cfg = of_device_get_match_data(&pdev->dev); |
1263 | if (!host->cfg) | |
1264 | return -EINVAL; | |
51424b28 | 1265 | |
3cbcb160 | 1266 | ret = mmc_regulator_get_supply(host->mmc); |
aaab3c46 | 1267 | if (ret) |
3cbcb160 | 1268 | return ret; |
3cbcb160 DL |
1269 | |
1270 | host->reg_base = devm_ioremap_resource(&pdev->dev, | |
1271 | platform_get_resource(pdev, IORESOURCE_MEM, 0)); | |
1272 | if (IS_ERR(host->reg_base)) | |
1273 | return PTR_ERR(host->reg_base); | |
1274 | ||
1275 | host->clk_ahb = devm_clk_get(&pdev->dev, "ahb"); | |
1276 | if (IS_ERR(host->clk_ahb)) { | |
1277 | dev_err(&pdev->dev, "Could not get ahb clock\n"); | |
1278 | return PTR_ERR(host->clk_ahb); | |
1279 | } | |
1280 | ||
1281 | host->clk_mmc = devm_clk_get(&pdev->dev, "mmc"); | |
1282 | if (IS_ERR(host->clk_mmc)) { | |
1283 | dev_err(&pdev->dev, "Could not get mmc clock\n"); | |
1284 | return PTR_ERR(host->clk_mmc); | |
1285 | } | |
1286 | ||
b465646e HG |
1287 | if (host->cfg->clk_delays) { |
1288 | host->clk_output = devm_clk_get(&pdev->dev, "output"); | |
1289 | if (IS_ERR(host->clk_output)) { | |
1290 | dev_err(&pdev->dev, "Could not get output clock\n"); | |
1291 | return PTR_ERR(host->clk_output); | |
1292 | } | |
6c09bb85 | 1293 | |
b465646e HG |
1294 | host->clk_sample = devm_clk_get(&pdev->dev, "sample"); |
1295 | if (IS_ERR(host->clk_sample)) { | |
1296 | dev_err(&pdev->dev, "Could not get sample clock\n"); | |
1297 | return PTR_ERR(host->clk_sample); | |
1298 | } | |
6c09bb85 MR |
1299 | } |
1300 | ||
5e40ddac PZ |
1301 | host->reset = devm_reset_control_get_optional_exclusive(&pdev->dev, |
1302 | "ahb"); | |
9e71c589 CYT |
1303 | if (PTR_ERR(host->reset) == -EPROBE_DEFER) |
1304 | return PTR_ERR(host->reset); | |
3cbcb160 | 1305 | |
774c0103 | 1306 | ret = sunxi_mmc_enable(host); |
3cbcb160 | 1307 | if (ret) |
774c0103 | 1308 | return ret; |
3cbcb160 DL |
1309 | |
1310 | host->irq = platform_get_irq(pdev, 0); | |
2408a085 AY |
1311 | if (host->irq <= 0) { |
1312 | ret = -EINVAL; | |
774c0103 | 1313 | goto error_disable_mmc; |
2408a085 AY |
1314 | } |
1315 | ||
3cbcb160 DL |
1316 | return devm_request_threaded_irq(&pdev->dev, host->irq, sunxi_mmc_irq, |
1317 | sunxi_mmc_handle_manual_stop, 0, "sunxi-mmc", host); | |
1318 | ||
774c0103 MR |
1319 | error_disable_mmc: |
1320 | sunxi_mmc_disable(host); | |
3cbcb160 DL |
1321 | return ret; |
1322 | } | |
1323 | ||
1324 | static int sunxi_mmc_probe(struct platform_device *pdev) | |
1325 | { | |
1326 | struct sunxi_mmc_host *host; | |
1327 | struct mmc_host *mmc; | |
1328 | int ret; | |
1329 | ||
1330 | mmc = mmc_alloc_host(sizeof(struct sunxi_mmc_host), &pdev->dev); | |
1331 | if (!mmc) { | |
1332 | dev_err(&pdev->dev, "mmc alloc host failed\n"); | |
1333 | return -ENOMEM; | |
1334 | } | |
cb1214d2 | 1335 | platform_set_drvdata(pdev, mmc); |
3cbcb160 DL |
1336 | |
1337 | host = mmc_priv(mmc); | |
774c0103 | 1338 | host->dev = &pdev->dev; |
3cbcb160 DL |
1339 | host->mmc = mmc; |
1340 | spin_lock_init(&host->lock); | |
1341 | ||
1342 | ret = sunxi_mmc_resource_request(host, pdev); | |
1343 | if (ret) | |
1344 | goto error_free_host; | |
1345 | ||
1346 | host->sg_cpu = dma_alloc_coherent(&pdev->dev, PAGE_SIZE, | |
1347 | &host->sg_dma, GFP_KERNEL); | |
1348 | if (!host->sg_cpu) { | |
1349 | dev_err(&pdev->dev, "Failed to allocate DMA descriptor mem\n"); | |
1350 | ret = -ENOMEM; | |
1351 | goto error_free_host; | |
1352 | } | |
1353 | ||
ff39e7f7 CYT |
1354 | if (host->cfg->has_timings_switch) { |
1355 | /* | |
1356 | * Supports both old and new timing modes. | |
1357 | * Try setting the clk to new timing mode. | |
1358 | */ | |
1359 | sunxi_ccu_set_mmc_timing_mode(host->clk_mmc, true); | |
1360 | ||
1361 | /* And check the result */ | |
1362 | ret = sunxi_ccu_get_mmc_timing_mode(host->clk_mmc); | |
1363 | if (ret < 0) { | |
1364 | /* | |
1365 | * For whatever reason we were not able to get | |
1366 | * the current active mode. Default to old mode. | |
1367 | */ | |
1368 | dev_warn(&pdev->dev, "MMC clk timing mode unknown\n"); | |
1369 | host->use_new_timings = false; | |
1370 | } else { | |
1371 | host->use_new_timings = !!ret; | |
1372 | } | |
1373 | } else if (host->cfg->needs_new_timings) { | |
1374 | /* Supports new timing mode only */ | |
1375 | host->use_new_timings = true; | |
1376 | } | |
1377 | ||
3cbcb160 DL |
1378 | mmc->ops = &sunxi_mmc_ops; |
1379 | mmc->max_blk_count = 8192; | |
1380 | mmc->max_blk_size = 4096; | |
1381 | mmc->max_segs = PAGE_SIZE / sizeof(struct sunxi_idma_des); | |
86a93317 | 1382 | mmc->max_seg_size = (1 << host->cfg->idma_des_size_bits); |
3cbcb160 | 1383 | mmc->max_req_size = mmc->max_seg_size * mmc->max_segs; |
2dcb305a | 1384 | /* 400kHz ~ 52MHz */ |
3cbcb160 | 1385 | mmc->f_min = 400000; |
2dcb305a | 1386 | mmc->f_max = 52000000; |
3df01a93 | 1387 | mmc->caps |= MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED | |
a4101dcb | 1388 | MMC_CAP_ERASE | MMC_CAP_SDIO_IRQ; |
3cbcb160 | 1389 | |
c903a2ae | 1390 | if (host->cfg->clk_delays || host->use_new_timings) |
88023d43 | 1391 | mmc->caps |= MMC_CAP_1_8V_DDR | MMC_CAP_3_3V_DDR; |
b465646e | 1392 | |
3cbcb160 | 1393 | ret = mmc_of_parse(mmc); |
eef797ac MR |
1394 | if (ret) |
1395 | goto error_free_dma; | |
1396 | ||
1397 | ret = sunxi_mmc_init_host(host); | |
3cbcb160 DL |
1398 | if (ret) |
1399 | goto error_free_dma; | |
1400 | ||
9a8e1e8c MR |
1401 | pm_runtime_set_active(&pdev->dev); |
1402 | pm_runtime_set_autosuspend_delay(&pdev->dev, 50); | |
1403 | pm_runtime_use_autosuspend(&pdev->dev); | |
1404 | pm_runtime_enable(&pdev->dev); | |
1405 | ||
3cbcb160 DL |
1406 | ret = mmc_add_host(mmc); |
1407 | if (ret) | |
1408 | goto error_free_dma; | |
1409 | ||
1410 | dev_info(&pdev->dev, "base:0x%p irq:%u\n", host->reg_base, host->irq); | |
3cbcb160 DL |
1411 | return 0; |
1412 | ||
1413 | error_free_dma: | |
1414 | dma_free_coherent(&pdev->dev, PAGE_SIZE, host->sg_cpu, host->sg_dma); | |
1415 | error_free_host: | |
1416 | mmc_free_host(mmc); | |
1417 | return ret; | |
1418 | } | |
1419 | ||
1420 | static int sunxi_mmc_remove(struct platform_device *pdev) | |
1421 | { | |
1422 | struct mmc_host *mmc = platform_get_drvdata(pdev); | |
1423 | struct sunxi_mmc_host *host = mmc_priv(mmc); | |
1424 | ||
1425 | mmc_remove_host(mmc); | |
9a8e1e8c | 1426 | pm_runtime_force_suspend(&pdev->dev); |
3cbcb160 | 1427 | disable_irq(host->irq); |
774c0103 | 1428 | sunxi_mmc_disable(host); |
3cbcb160 DL |
1429 | dma_free_coherent(&pdev->dev, PAGE_SIZE, host->sg_cpu, host->sg_dma); |
1430 | mmc_free_host(mmc); | |
1431 | ||
1432 | return 0; | |
1433 | } | |
1434 | ||
af6b8ff4 UH |
1435 | #ifdef CONFIG_PM |
1436 | static int sunxi_mmc_runtime_resume(struct device *dev) | |
9a8e1e8c MR |
1437 | { |
1438 | struct mmc_host *mmc = dev_get_drvdata(dev); | |
1439 | struct sunxi_mmc_host *host = mmc_priv(mmc); | |
1440 | int ret; | |
1441 | ||
1442 | ret = sunxi_mmc_enable(host); | |
1443 | if (ret) | |
1444 | return ret; | |
1445 | ||
1446 | sunxi_mmc_init_host(host); | |
1447 | sunxi_mmc_set_bus_width(host, mmc->ios.bus_width); | |
1448 | sunxi_mmc_set_clk(host, &mmc->ios); | |
b8ba3578 | 1449 | enable_irq(host->irq); |
9a8e1e8c MR |
1450 | |
1451 | return 0; | |
1452 | } | |
1453 | ||
af6b8ff4 | 1454 | static int sunxi_mmc_runtime_suspend(struct device *dev) |
9a8e1e8c MR |
1455 | { |
1456 | struct mmc_host *mmc = dev_get_drvdata(dev); | |
1457 | struct sunxi_mmc_host *host = mmc_priv(mmc); | |
1458 | ||
b8ba3578 SM |
1459 | /* |
1460 | * When clocks are off, it's possible receiving | |
1461 | * fake interrupts, which will stall the system. | |
1462 | * Disabling the irq will prevent this. | |
1463 | */ | |
1464 | disable_irq(host->irq); | |
9a8e1e8c MR |
1465 | sunxi_mmc_reset_host(host); |
1466 | sunxi_mmc_disable(host); | |
1467 | ||
1468 | return 0; | |
1469 | } | |
af6b8ff4 | 1470 | #endif |
9a8e1e8c MR |
1471 | |
1472 | static const struct dev_pm_ops sunxi_mmc_pm_ops = { | |
1473 | SET_RUNTIME_PM_OPS(sunxi_mmc_runtime_suspend, | |
1474 | sunxi_mmc_runtime_resume, | |
1475 | NULL) | |
1476 | }; | |
1477 | ||
3cbcb160 DL |
1478 | static struct platform_driver sunxi_mmc_driver = { |
1479 | .driver = { | |
1480 | .name = "sunxi-mmc", | |
3cbcb160 | 1481 | .of_match_table = of_match_ptr(sunxi_mmc_of_match), |
9a8e1e8c | 1482 | .pm = &sunxi_mmc_pm_ops, |
3cbcb160 DL |
1483 | }, |
1484 | .probe = sunxi_mmc_probe, | |
1485 | .remove = sunxi_mmc_remove, | |
1486 | }; | |
1487 | module_platform_driver(sunxi_mmc_driver); | |
1488 | ||
1489 | MODULE_DESCRIPTION("Allwinner's SD/MMC Card Controller Driver"); | |
1490 | MODULE_LICENSE("GPL v2"); | |
1907e386 | 1491 | MODULE_AUTHOR("David Lanzendörfer <david.lanzendoerfer@o2s.ch>"); |
3cbcb160 | 1492 | MODULE_ALIAS("platform:sunxi-mmc"); |