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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
3cbcb160 DL |
2 | /* |
3 | * Driver for sunxi SD/MMC host controllers | |
4 | * (C) Copyright 2007-2011 Reuuimlla Technology Co., Ltd. | |
5 | * (C) Copyright 2007-2011 Aaron Maoye <leafy.myeh@reuuimllatech.com> | |
6 | * (C) Copyright 2013-2014 O2S GmbH <www.o2s.ch> | |
1907e386 | 7 | * (C) Copyright 2013-2014 David Lanzendörfer <david.lanzendoerfer@o2s.ch> |
3cbcb160 | 8 | * (C) Copyright 2013-2014 Hans de Goede <hdegoede@redhat.com> |
4fb3ce07 | 9 | * (C) Copyright 2017 Sootech SA |
3cbcb160 DL |
10 | */ |
11 | ||
3cbcb160 | 12 | #include <linux/clk.h> |
ff39e7f7 | 13 | #include <linux/clk/sunxi-ng.h> |
743b819e MR |
14 | #include <linux/delay.h> |
15 | #include <linux/device.h> | |
3cbcb160 | 16 | #include <linux/dma-mapping.h> |
743b819e | 17 | #include <linux/err.h> |
743b819e MR |
18 | #include <linux/interrupt.h> |
19 | #include <linux/io.h> | |
20 | #include <linux/kernel.h> | |
21 | #include <linux/mmc/card.h> | |
22 | #include <linux/mmc/core.h> | |
3cbcb160 | 23 | #include <linux/mmc/host.h> |
743b819e | 24 | #include <linux/mmc/mmc.h> |
3cbcb160 DL |
25 | #include <linux/mmc/sd.h> |
26 | #include <linux/mmc/sdio.h> | |
3cbcb160 | 27 | #include <linux/mmc/slot-gpio.h> |
743b819e MR |
28 | #include <linux/module.h> |
29 | #include <linux/of_address.h> | |
743b819e MR |
30 | #include <linux/of_platform.h> |
31 | #include <linux/platform_device.h> | |
9a8e1e8c | 32 | #include <linux/pm_runtime.h> |
743b819e MR |
33 | #include <linux/regulator/consumer.h> |
34 | #include <linux/reset.h> | |
35 | #include <linux/scatterlist.h> | |
36 | #include <linux/slab.h> | |
37 | #include <linux/spinlock.h> | |
3cbcb160 DL |
38 | |
39 | /* register offset definitions */ | |
40 | #define SDXC_REG_GCTRL (0x00) /* SMC Global Control Register */ | |
41 | #define SDXC_REG_CLKCR (0x04) /* SMC Clock Control Register */ | |
42 | #define SDXC_REG_TMOUT (0x08) /* SMC Time Out Register */ | |
43 | #define SDXC_REG_WIDTH (0x0C) /* SMC Bus Width Register */ | |
44 | #define SDXC_REG_BLKSZ (0x10) /* SMC Block Size Register */ | |
45 | #define SDXC_REG_BCNTR (0x14) /* SMC Byte Count Register */ | |
46 | #define SDXC_REG_CMDR (0x18) /* SMC Command Register */ | |
47 | #define SDXC_REG_CARG (0x1C) /* SMC Argument Register */ | |
48 | #define SDXC_REG_RESP0 (0x20) /* SMC Response Register 0 */ | |
49 | #define SDXC_REG_RESP1 (0x24) /* SMC Response Register 1 */ | |
50 | #define SDXC_REG_RESP2 (0x28) /* SMC Response Register 2 */ | |
51 | #define SDXC_REG_RESP3 (0x2C) /* SMC Response Register 3 */ | |
52 | #define SDXC_REG_IMASK (0x30) /* SMC Interrupt Mask Register */ | |
53 | #define SDXC_REG_MISTA (0x34) /* SMC Masked Interrupt Status Register */ | |
54 | #define SDXC_REG_RINTR (0x38) /* SMC Raw Interrupt Status Register */ | |
55 | #define SDXC_REG_STAS (0x3C) /* SMC Status Register */ | |
56 | #define SDXC_REG_FTRGL (0x40) /* SMC FIFO Threshold Watermark Registe */ | |
57 | #define SDXC_REG_FUNS (0x44) /* SMC Function Select Register */ | |
58 | #define SDXC_REG_CBCR (0x48) /* SMC CIU Byte Count Register */ | |
59 | #define SDXC_REG_BBCR (0x4C) /* SMC BIU Byte Count Register */ | |
60 | #define SDXC_REG_DBGC (0x50) /* SMC Debug Enable Register */ | |
61 | #define SDXC_REG_HWRST (0x78) /* SMC Card Hardware Reset for Register */ | |
62 | #define SDXC_REG_DMAC (0x80) /* SMC IDMAC Control Register */ | |
63 | #define SDXC_REG_DLBA (0x84) /* SMC IDMAC Descriptor List Base Addre */ | |
64 | #define SDXC_REG_IDST (0x88) /* SMC IDMAC Status Register */ | |
65 | #define SDXC_REG_IDIE (0x8C) /* SMC IDMAC Interrupt Enable Register */ | |
66 | #define SDXC_REG_CHDA (0x90) | |
67 | #define SDXC_REG_CBDA (0x94) | |
68 | ||
e1b8dfd1 IZ |
69 | /* New registers introduced in A64 */ |
70 | #define SDXC_REG_A12A 0x058 /* SMC Auto Command 12 Register */ | |
71 | #define SDXC_REG_SD_NTSR 0x05C /* SMC New Timing Set Register */ | |
72 | #define SDXC_REG_DRV_DL 0x140 /* Drive Delay Control Register */ | |
73 | #define SDXC_REG_SAMP_DL_REG 0x144 /* SMC sample delay control */ | |
74 | #define SDXC_REG_DS_DL_REG 0x148 /* SMC data strobe delay control */ | |
75 | ||
3cbcb160 DL |
76 | #define mmc_readl(host, reg) \ |
77 | readl((host)->reg_base + SDXC_##reg) | |
78 | #define mmc_writel(host, reg, value) \ | |
79 | writel((value), (host)->reg_base + SDXC_##reg) | |
80 | ||
81 | /* global control register bits */ | |
82 | #define SDXC_SOFT_RESET BIT(0) | |
83 | #define SDXC_FIFO_RESET BIT(1) | |
84 | #define SDXC_DMA_RESET BIT(2) | |
85 | #define SDXC_INTERRUPT_ENABLE_BIT BIT(4) | |
86 | #define SDXC_DMA_ENABLE_BIT BIT(5) | |
87 | #define SDXC_DEBOUNCE_ENABLE_BIT BIT(8) | |
88 | #define SDXC_POSEDGE_LATCH_DATA BIT(9) | |
89 | #define SDXC_DDR_MODE BIT(10) | |
90 | #define SDXC_MEMORY_ACCESS_DONE BIT(29) | |
91 | #define SDXC_ACCESS_DONE_DIRECT BIT(30) | |
92 | #define SDXC_ACCESS_BY_AHB BIT(31) | |
93 | #define SDXC_ACCESS_BY_DMA (0 << 31) | |
94 | #define SDXC_HARDWARE_RESET \ | |
95 | (SDXC_SOFT_RESET | SDXC_FIFO_RESET | SDXC_DMA_RESET) | |
96 | ||
97 | /* clock control bits */ | |
16e821e3 | 98 | #define SDXC_MASK_DATA0 BIT(31) |
3cbcb160 DL |
99 | #define SDXC_CARD_CLOCK_ON BIT(16) |
100 | #define SDXC_LOW_POWER_ON BIT(17) | |
101 | ||
102 | /* bus width */ | |
103 | #define SDXC_WIDTH1 0 | |
104 | #define SDXC_WIDTH4 1 | |
105 | #define SDXC_WIDTH8 2 | |
106 | ||
107 | /* smc command bits */ | |
108 | #define SDXC_RESP_EXPIRE BIT(6) | |
109 | #define SDXC_LONG_RESPONSE BIT(7) | |
110 | #define SDXC_CHECK_RESPONSE_CRC BIT(8) | |
111 | #define SDXC_DATA_EXPIRE BIT(9) | |
112 | #define SDXC_WRITE BIT(10) | |
113 | #define SDXC_SEQUENCE_MODE BIT(11) | |
114 | #define SDXC_SEND_AUTO_STOP BIT(12) | |
115 | #define SDXC_WAIT_PRE_OVER BIT(13) | |
116 | #define SDXC_STOP_ABORT_CMD BIT(14) | |
117 | #define SDXC_SEND_INIT_SEQUENCE BIT(15) | |
118 | #define SDXC_UPCLK_ONLY BIT(21) | |
119 | #define SDXC_READ_CEATA_DEV BIT(22) | |
120 | #define SDXC_CCS_EXPIRE BIT(23) | |
121 | #define SDXC_ENABLE_BIT_BOOT BIT(24) | |
122 | #define SDXC_ALT_BOOT_OPTIONS BIT(25) | |
123 | #define SDXC_BOOT_ACK_EXPIRE BIT(26) | |
124 | #define SDXC_BOOT_ABORT BIT(27) | |
125 | #define SDXC_VOLTAGE_SWITCH BIT(28) | |
126 | #define SDXC_USE_HOLD_REGISTER BIT(29) | |
127 | #define SDXC_START BIT(31) | |
128 | ||
129 | /* interrupt bits */ | |
130 | #define SDXC_RESP_ERROR BIT(1) | |
131 | #define SDXC_COMMAND_DONE BIT(2) | |
132 | #define SDXC_DATA_OVER BIT(3) | |
133 | #define SDXC_TX_DATA_REQUEST BIT(4) | |
134 | #define SDXC_RX_DATA_REQUEST BIT(5) | |
135 | #define SDXC_RESP_CRC_ERROR BIT(6) | |
136 | #define SDXC_DATA_CRC_ERROR BIT(7) | |
137 | #define SDXC_RESP_TIMEOUT BIT(8) | |
138 | #define SDXC_DATA_TIMEOUT BIT(9) | |
139 | #define SDXC_VOLTAGE_CHANGE_DONE BIT(10) | |
140 | #define SDXC_FIFO_RUN_ERROR BIT(11) | |
141 | #define SDXC_HARD_WARE_LOCKED BIT(12) | |
142 | #define SDXC_START_BIT_ERROR BIT(13) | |
143 | #define SDXC_AUTO_COMMAND_DONE BIT(14) | |
144 | #define SDXC_END_BIT_ERROR BIT(15) | |
145 | #define SDXC_SDIO_INTERRUPT BIT(16) | |
146 | #define SDXC_CARD_INSERT BIT(30) | |
147 | #define SDXC_CARD_REMOVE BIT(31) | |
148 | #define SDXC_INTERRUPT_ERROR_BIT \ | |
149 | (SDXC_RESP_ERROR | SDXC_RESP_CRC_ERROR | SDXC_DATA_CRC_ERROR | \ | |
150 | SDXC_RESP_TIMEOUT | SDXC_DATA_TIMEOUT | SDXC_FIFO_RUN_ERROR | \ | |
151 | SDXC_HARD_WARE_LOCKED | SDXC_START_BIT_ERROR | SDXC_END_BIT_ERROR) | |
152 | #define SDXC_INTERRUPT_DONE_BIT \ | |
153 | (SDXC_AUTO_COMMAND_DONE | SDXC_DATA_OVER | \ | |
154 | SDXC_COMMAND_DONE | SDXC_VOLTAGE_CHANGE_DONE) | |
155 | ||
156 | /* status */ | |
157 | #define SDXC_RXWL_FLAG BIT(0) | |
158 | #define SDXC_TXWL_FLAG BIT(1) | |
159 | #define SDXC_FIFO_EMPTY BIT(2) | |
160 | #define SDXC_FIFO_FULL BIT(3) | |
161 | #define SDXC_CARD_PRESENT BIT(8) | |
162 | #define SDXC_CARD_DATA_BUSY BIT(9) | |
163 | #define SDXC_DATA_FSM_BUSY BIT(10) | |
164 | #define SDXC_DMA_REQUEST BIT(31) | |
165 | #define SDXC_FIFO_SIZE 16 | |
166 | ||
167 | /* Function select */ | |
168 | #define SDXC_CEATA_ON (0xceaa << 16) | |
169 | #define SDXC_SEND_IRQ_RESPONSE BIT(0) | |
170 | #define SDXC_SDIO_READ_WAIT BIT(1) | |
171 | #define SDXC_ABORT_READ_DATA BIT(2) | |
172 | #define SDXC_SEND_CCSD BIT(8) | |
173 | #define SDXC_SEND_AUTO_STOPCCSD BIT(9) | |
174 | #define SDXC_CEATA_DEV_IRQ_ENABLE BIT(10) | |
175 | ||
176 | /* IDMA controller bus mod bit field */ | |
177 | #define SDXC_IDMAC_SOFT_RESET BIT(0) | |
178 | #define SDXC_IDMAC_FIX_BURST BIT(1) | |
179 | #define SDXC_IDMAC_IDMA_ON BIT(7) | |
180 | #define SDXC_IDMAC_REFETCH_DES BIT(31) | |
181 | ||
182 | /* IDMA status bit field */ | |
183 | #define SDXC_IDMAC_TRANSMIT_INTERRUPT BIT(0) | |
184 | #define SDXC_IDMAC_RECEIVE_INTERRUPT BIT(1) | |
185 | #define SDXC_IDMAC_FATAL_BUS_ERROR BIT(2) | |
186 | #define SDXC_IDMAC_DESTINATION_INVALID BIT(4) | |
187 | #define SDXC_IDMAC_CARD_ERROR_SUM BIT(5) | |
188 | #define SDXC_IDMAC_NORMAL_INTERRUPT_SUM BIT(8) | |
189 | #define SDXC_IDMAC_ABNORMAL_INTERRUPT_SUM BIT(9) | |
190 | #define SDXC_IDMAC_HOST_ABORT_INTERRUPT BIT(10) | |
191 | #define SDXC_IDMAC_IDLE (0 << 13) | |
192 | #define SDXC_IDMAC_SUSPEND (1 << 13) | |
193 | #define SDXC_IDMAC_DESC_READ (2 << 13) | |
194 | #define SDXC_IDMAC_DESC_CHECK (3 << 13) | |
195 | #define SDXC_IDMAC_READ_REQUEST_WAIT (4 << 13) | |
196 | #define SDXC_IDMAC_WRITE_REQUEST_WAIT (5 << 13) | |
197 | #define SDXC_IDMAC_READ (6 << 13) | |
198 | #define SDXC_IDMAC_WRITE (7 << 13) | |
199 | #define SDXC_IDMAC_DESC_CLOSE (8 << 13) | |
200 | ||
201 | /* | |
202 | * If the idma-des-size-bits of property is ie 13, bufsize bits are: | |
203 | * Bits 0-12: buf1 size | |
204 | * Bits 13-25: buf2 size | |
205 | * Bits 26-31: not used | |
206 | * Since we only ever set buf1 size, we can simply store it directly. | |
207 | */ | |
208 | #define SDXC_IDMAC_DES0_DIC BIT(1) /* disable interrupt on completion */ | |
209 | #define SDXC_IDMAC_DES0_LD BIT(2) /* last descriptor */ | |
210 | #define SDXC_IDMAC_DES0_FD BIT(3) /* first descriptor */ | |
211 | #define SDXC_IDMAC_DES0_CH BIT(4) /* chain mode */ | |
212 | #define SDXC_IDMAC_DES0_ER BIT(5) /* end of ring */ | |
213 | #define SDXC_IDMAC_DES0_CES BIT(30) /* card error summary */ | |
214 | #define SDXC_IDMAC_DES0_OWN BIT(31) /* 1-idma owns it, 0-host owns it */ | |
215 | ||
51424b28 HG |
216 | #define SDXC_CLK_400K 0 |
217 | #define SDXC_CLK_25M 1 | |
218 | #define SDXC_CLK_50M 2 | |
219 | #define SDXC_CLK_50M_DDR 3 | |
2a7aa63a | 220 | #define SDXC_CLK_50M_DDR_8BIT 4 |
51424b28 | 221 | |
e1b8dfd1 IZ |
222 | #define SDXC_2X_TIMING_MODE BIT(31) |
223 | ||
224 | #define SDXC_CAL_START BIT(15) | |
225 | #define SDXC_CAL_DONE BIT(14) | |
226 | #define SDXC_CAL_DL_SHIFT 8 | |
227 | #define SDXC_CAL_DL_SW_EN BIT(7) | |
228 | #define SDXC_CAL_DL_SW_SHIFT 0 | |
229 | #define SDXC_CAL_DL_MASK 0x3f | |
230 | ||
231 | #define SDXC_CAL_TIMEOUT 3 /* in seconds, 3s is enough*/ | |
232 | ||
51424b28 HG |
233 | struct sunxi_mmc_clk_delay { |
234 | u32 output; | |
235 | u32 sample; | |
236 | }; | |
237 | ||
3cbcb160 | 238 | struct sunxi_idma_des { |
2dd110b2 MW |
239 | __le32 config; |
240 | __le32 buf_size; | |
241 | __le32 buf_addr_ptr1; | |
242 | __le32 buf_addr_ptr2; | |
3cbcb160 DL |
243 | }; |
244 | ||
86a93317 HG |
245 | struct sunxi_mmc_cfg { |
246 | u32 idma_des_size_bits; | |
247 | const struct sunxi_mmc_clk_delay *clk_delays; | |
e1b8dfd1 IZ |
248 | |
249 | /* does the IP block support autocalibration? */ | |
250 | bool can_calibrate; | |
9a37e53e | 251 | |
16e821e3 MR |
252 | /* Does DATA0 needs to be masked while the clock is updated */ |
253 | bool mask_data0; | |
254 | ||
1ff9cabd CYT |
255 | /* |
256 | * hardware only supports new timing mode, either due to lack of | |
257 | * a mode switch in the clock controller, or the mmc controller | |
258 | * is permanently configured in the new timing mode, without the | |
259 | * NTSR mode switch. | |
260 | */ | |
9a37e53e | 261 | bool needs_new_timings; |
ff39e7f7 | 262 | |
1ff9cabd CYT |
263 | /* clock hardware can switch between old and new timing modes */ |
264 | bool ccu_has_timings_switch; | |
86a93317 HG |
265 | }; |
266 | ||
3cbcb160 | 267 | struct sunxi_mmc_host { |
774c0103 | 268 | struct device *dev; |
3cbcb160 DL |
269 | struct mmc_host *mmc; |
270 | struct reset_control *reset; | |
86a93317 | 271 | const struct sunxi_mmc_cfg *cfg; |
3cbcb160 DL |
272 | |
273 | /* IO mapping base */ | |
274 | void __iomem *reg_base; | |
275 | ||
276 | /* clock management */ | |
277 | struct clk *clk_ahb; | |
278 | struct clk *clk_mmc; | |
6c09bb85 MR |
279 | struct clk *clk_sample; |
280 | struct clk *clk_output; | |
3cbcb160 DL |
281 | |
282 | /* irq */ | |
283 | spinlock_t lock; | |
284 | int irq; | |
285 | u32 int_sum; | |
286 | u32 sdio_imask; | |
287 | ||
288 | /* dma */ | |
3cbcb160 DL |
289 | dma_addr_t sg_dma; |
290 | void *sg_cpu; | |
291 | bool wait_dma; | |
292 | ||
293 | struct mmc_request *mrq; | |
294 | struct mmc_request *manual_stop_mrq; | |
295 | int ferror; | |
f771f6e8 CYT |
296 | |
297 | /* vqmmc */ | |
298 | bool vqmmc_enabled; | |
ff39e7f7 CYT |
299 | |
300 | /* timings */ | |
301 | bool use_new_timings; | |
3cbcb160 DL |
302 | }; |
303 | ||
304 | static int sunxi_mmc_reset_host(struct sunxi_mmc_host *host) | |
305 | { | |
306 | unsigned long expire = jiffies + msecs_to_jiffies(250); | |
307 | u32 rval; | |
308 | ||
0f0fcd37 | 309 | mmc_writel(host, REG_GCTRL, SDXC_HARDWARE_RESET); |
3cbcb160 DL |
310 | do { |
311 | rval = mmc_readl(host, REG_GCTRL); | |
312 | } while (time_before(jiffies, expire) && (rval & SDXC_HARDWARE_RESET)); | |
313 | ||
314 | if (rval & SDXC_HARDWARE_RESET) { | |
315 | dev_err(mmc_dev(host->mmc), "fatal err reset timeout\n"); | |
316 | return -EIO; | |
317 | } | |
318 | ||
319 | return 0; | |
320 | } | |
321 | ||
0fc4c61f | 322 | static int sunxi_mmc_init_host(struct sunxi_mmc_host *host) |
3cbcb160 DL |
323 | { |
324 | u32 rval; | |
3cbcb160 DL |
325 | |
326 | if (sunxi_mmc_reset_host(host)) | |
327 | return -EIO; | |
328 | ||
0314cbd4 CYT |
329 | /* |
330 | * Burst 8 transfers, RX trigger level: 7, TX trigger level: 8 | |
331 | * | |
332 | * TODO: sun9i has a larger FIFO and supports higher trigger values | |
333 | */ | |
3cbcb160 | 334 | mmc_writel(host, REG_FTRGL, 0x20070008); |
0314cbd4 | 335 | /* Maximum timeout value */ |
3cbcb160 | 336 | mmc_writel(host, REG_TMOUT, 0xffffffff); |
0314cbd4 | 337 | /* Unmask SDIO interrupt if needed */ |
3cbcb160 | 338 | mmc_writel(host, REG_IMASK, host->sdio_imask); |
0314cbd4 | 339 | /* Clear all pending interrupts */ |
3cbcb160 | 340 | mmc_writel(host, REG_RINTR, 0xffffffff); |
0314cbd4 | 341 | /* Debug register? undocumented */ |
3cbcb160 | 342 | mmc_writel(host, REG_DBGC, 0xdeb); |
0314cbd4 | 343 | /* Enable CEATA support */ |
3cbcb160 | 344 | mmc_writel(host, REG_FUNS, SDXC_CEATA_ON); |
0314cbd4 | 345 | /* Set DMA descriptor list base address */ |
3cbcb160 DL |
346 | mmc_writel(host, REG_DLBA, host->sg_dma); |
347 | ||
348 | rval = mmc_readl(host, REG_GCTRL); | |
349 | rval |= SDXC_INTERRUPT_ENABLE_BIT; | |
0314cbd4 | 350 | /* Undocumented, but found in Allwinner code */ |
3cbcb160 DL |
351 | rval &= ~SDXC_ACCESS_DONE_DIRECT; |
352 | mmc_writel(host, REG_GCTRL, rval); | |
353 | ||
354 | return 0; | |
355 | } | |
356 | ||
357 | static void sunxi_mmc_init_idma_des(struct sunxi_mmc_host *host, | |
358 | struct mmc_data *data) | |
359 | { | |
360 | struct sunxi_idma_des *pdes = (struct sunxi_idma_des *)host->sg_cpu; | |
d34712d2 | 361 | dma_addr_t next_desc = host->sg_dma; |
86a93317 | 362 | int i, max_len = (1 << host->cfg->idma_des_size_bits); |
3cbcb160 DL |
363 | |
364 | for (i = 0; i < data->sg_len; i++) { | |
2dd110b2 MW |
365 | pdes[i].config = cpu_to_le32(SDXC_IDMAC_DES0_CH | |
366 | SDXC_IDMAC_DES0_OWN | | |
367 | SDXC_IDMAC_DES0_DIC); | |
3cbcb160 DL |
368 | |
369 | if (data->sg[i].length == max_len) | |
370 | pdes[i].buf_size = 0; /* 0 == max_len */ | |
371 | else | |
2dd110b2 | 372 | pdes[i].buf_size = cpu_to_le32(data->sg[i].length); |
3cbcb160 | 373 | |
d34712d2 | 374 | next_desc += sizeof(struct sunxi_idma_des); |
2dd110b2 MW |
375 | pdes[i].buf_addr_ptr1 = |
376 | cpu_to_le32(sg_dma_address(&data->sg[i])); | |
377 | pdes[i].buf_addr_ptr2 = cpu_to_le32((u32)next_desc); | |
3cbcb160 DL |
378 | } |
379 | ||
2dd110b2 MW |
380 | pdes[0].config |= cpu_to_le32(SDXC_IDMAC_DES0_FD); |
381 | pdes[i - 1].config |= cpu_to_le32(SDXC_IDMAC_DES0_LD | | |
382 | SDXC_IDMAC_DES0_ER); | |
383 | pdes[i - 1].config &= cpu_to_le32(~SDXC_IDMAC_DES0_DIC); | |
e8a59049 | 384 | pdes[i - 1].buf_addr_ptr2 = 0; |
3cbcb160 DL |
385 | |
386 | /* | |
387 | * Avoid the io-store starting the idmac hitting io-mem before the | |
388 | * descriptors hit the main-mem. | |
389 | */ | |
390 | wmb(); | |
391 | } | |
392 | ||
3cbcb160 DL |
393 | static int sunxi_mmc_map_dma(struct sunxi_mmc_host *host, |
394 | struct mmc_data *data) | |
395 | { | |
396 | u32 i, dma_len; | |
397 | struct scatterlist *sg; | |
398 | ||
399 | dma_len = dma_map_sg(mmc_dev(host->mmc), data->sg, data->sg_len, | |
feeef096 | 400 | mmc_get_dma_dir(data)); |
3cbcb160 DL |
401 | if (dma_len == 0) { |
402 | dev_err(mmc_dev(host->mmc), "dma_map_sg failed\n"); | |
403 | return -ENOMEM; | |
404 | } | |
405 | ||
406 | for_each_sg(data->sg, sg, data->sg_len, i) { | |
407 | if (sg->offset & 3 || sg->length & 3) { | |
408 | dev_err(mmc_dev(host->mmc), | |
409 | "unaligned scatterlist: os %x length %d\n", | |
410 | sg->offset, sg->length); | |
411 | return -EINVAL; | |
412 | } | |
413 | } | |
414 | ||
415 | return 0; | |
416 | } | |
417 | ||
418 | static void sunxi_mmc_start_dma(struct sunxi_mmc_host *host, | |
419 | struct mmc_data *data) | |
420 | { | |
421 | u32 rval; | |
422 | ||
423 | sunxi_mmc_init_idma_des(host, data); | |
424 | ||
425 | rval = mmc_readl(host, REG_GCTRL); | |
426 | rval |= SDXC_DMA_ENABLE_BIT; | |
427 | mmc_writel(host, REG_GCTRL, rval); | |
428 | rval |= SDXC_DMA_RESET; | |
429 | mmc_writel(host, REG_GCTRL, rval); | |
430 | ||
431 | mmc_writel(host, REG_DMAC, SDXC_IDMAC_SOFT_RESET); | |
432 | ||
433 | if (!(data->flags & MMC_DATA_WRITE)) | |
434 | mmc_writel(host, REG_IDIE, SDXC_IDMAC_RECEIVE_INTERRUPT); | |
435 | ||
436 | mmc_writel(host, REG_DMAC, | |
437 | SDXC_IDMAC_FIX_BURST | SDXC_IDMAC_IDMA_ON); | |
438 | } | |
439 | ||
440 | static void sunxi_mmc_send_manual_stop(struct sunxi_mmc_host *host, | |
441 | struct mmc_request *req) | |
442 | { | |
443 | u32 arg, cmd_val, ri; | |
444 | unsigned long expire = jiffies + msecs_to_jiffies(1000); | |
445 | ||
446 | cmd_val = SDXC_START | SDXC_RESP_EXPIRE | | |
447 | SDXC_STOP_ABORT_CMD | SDXC_CHECK_RESPONSE_CRC; | |
448 | ||
449 | if (req->cmd->opcode == SD_IO_RW_EXTENDED) { | |
450 | cmd_val |= SD_IO_RW_DIRECT; | |
451 | arg = (1 << 31) | (0 << 28) | (SDIO_CCCR_ABORT << 9) | | |
452 | ((req->cmd->arg >> 28) & 0x7); | |
453 | } else { | |
454 | cmd_val |= MMC_STOP_TRANSMISSION; | |
455 | arg = 0; | |
456 | } | |
457 | ||
458 | mmc_writel(host, REG_CARG, arg); | |
459 | mmc_writel(host, REG_CMDR, cmd_val); | |
460 | ||
461 | do { | |
462 | ri = mmc_readl(host, REG_RINTR); | |
463 | } while (!(ri & (SDXC_COMMAND_DONE | SDXC_INTERRUPT_ERROR_BIT)) && | |
464 | time_before(jiffies, expire)); | |
465 | ||
466 | if (!(ri & SDXC_COMMAND_DONE) || (ri & SDXC_INTERRUPT_ERROR_BIT)) { | |
467 | dev_err(mmc_dev(host->mmc), "send stop command failed\n"); | |
468 | if (req->stop) | |
469 | req->stop->resp[0] = -ETIMEDOUT; | |
470 | } else { | |
471 | if (req->stop) | |
472 | req->stop->resp[0] = mmc_readl(host, REG_RESP0); | |
473 | } | |
474 | ||
475 | mmc_writel(host, REG_RINTR, 0xffff); | |
476 | } | |
477 | ||
478 | static void sunxi_mmc_dump_errinfo(struct sunxi_mmc_host *host) | |
479 | { | |
480 | struct mmc_command *cmd = host->mrq->cmd; | |
481 | struct mmc_data *data = host->mrq->data; | |
482 | ||
483 | /* For some cmds timeout is normal with sd/mmc cards */ | |
484 | if ((host->int_sum & SDXC_INTERRUPT_ERROR_BIT) == | |
485 | SDXC_RESP_TIMEOUT && (cmd->opcode == SD_IO_SEND_OP_COND || | |
486 | cmd->opcode == SD_IO_RW_DIRECT)) | |
487 | return; | |
488 | ||
bd675698 | 489 | dev_dbg(mmc_dev(host->mmc), |
3cbcb160 DL |
490 | "smc %d err, cmd %d,%s%s%s%s%s%s%s%s%s%s !!\n", |
491 | host->mmc->index, cmd->opcode, | |
492 | data ? (data->flags & MMC_DATA_WRITE ? " WR" : " RD") : "", | |
493 | host->int_sum & SDXC_RESP_ERROR ? " RE" : "", | |
494 | host->int_sum & SDXC_RESP_CRC_ERROR ? " RCE" : "", | |
495 | host->int_sum & SDXC_DATA_CRC_ERROR ? " DCE" : "", | |
496 | host->int_sum & SDXC_RESP_TIMEOUT ? " RTO" : "", | |
497 | host->int_sum & SDXC_DATA_TIMEOUT ? " DTO" : "", | |
498 | host->int_sum & SDXC_FIFO_RUN_ERROR ? " FE" : "", | |
499 | host->int_sum & SDXC_HARD_WARE_LOCKED ? " HL" : "", | |
500 | host->int_sum & SDXC_START_BIT_ERROR ? " SBE" : "", | |
501 | host->int_sum & SDXC_END_BIT_ERROR ? " EBE" : "" | |
502 | ); | |
503 | } | |
504 | ||
505 | /* Called in interrupt context! */ | |
506 | static irqreturn_t sunxi_mmc_finalize_request(struct sunxi_mmc_host *host) | |
507 | { | |
508 | struct mmc_request *mrq = host->mrq; | |
509 | struct mmc_data *data = mrq->data; | |
510 | u32 rval; | |
511 | ||
512 | mmc_writel(host, REG_IMASK, host->sdio_imask); | |
513 | mmc_writel(host, REG_IDIE, 0); | |
514 | ||
515 | if (host->int_sum & SDXC_INTERRUPT_ERROR_BIT) { | |
516 | sunxi_mmc_dump_errinfo(host); | |
517 | mrq->cmd->error = -ETIMEDOUT; | |
518 | ||
519 | if (data) { | |
520 | data->error = -ETIMEDOUT; | |
521 | host->manual_stop_mrq = mrq; | |
522 | } | |
523 | ||
524 | if (mrq->stop) | |
525 | mrq->stop->error = -ETIMEDOUT; | |
526 | } else { | |
527 | if (mrq->cmd->flags & MMC_RSP_136) { | |
528 | mrq->cmd->resp[0] = mmc_readl(host, REG_RESP3); | |
529 | mrq->cmd->resp[1] = mmc_readl(host, REG_RESP2); | |
530 | mrq->cmd->resp[2] = mmc_readl(host, REG_RESP1); | |
531 | mrq->cmd->resp[3] = mmc_readl(host, REG_RESP0); | |
532 | } else { | |
533 | mrq->cmd->resp[0] = mmc_readl(host, REG_RESP0); | |
534 | } | |
535 | ||
536 | if (data) | |
537 | data->bytes_xfered = data->blocks * data->blksz; | |
538 | } | |
539 | ||
540 | if (data) { | |
541 | mmc_writel(host, REG_IDST, 0x337); | |
542 | mmc_writel(host, REG_DMAC, 0); | |
543 | rval = mmc_readl(host, REG_GCTRL); | |
544 | rval |= SDXC_DMA_RESET; | |
545 | mmc_writel(host, REG_GCTRL, rval); | |
546 | rval &= ~SDXC_DMA_ENABLE_BIT; | |
547 | mmc_writel(host, REG_GCTRL, rval); | |
548 | rval |= SDXC_FIFO_RESET; | |
549 | mmc_writel(host, REG_GCTRL, rval); | |
550 | dma_unmap_sg(mmc_dev(host->mmc), data->sg, data->sg_len, | |
feeef096 | 551 | mmc_get_dma_dir(data)); |
3cbcb160 DL |
552 | } |
553 | ||
554 | mmc_writel(host, REG_RINTR, 0xffff); | |
555 | ||
556 | host->mrq = NULL; | |
557 | host->int_sum = 0; | |
558 | host->wait_dma = false; | |
559 | ||
560 | return host->manual_stop_mrq ? IRQ_WAKE_THREAD : IRQ_HANDLED; | |
561 | } | |
562 | ||
563 | static irqreturn_t sunxi_mmc_irq(int irq, void *dev_id) | |
564 | { | |
565 | struct sunxi_mmc_host *host = dev_id; | |
566 | struct mmc_request *mrq; | |
567 | u32 msk_int, idma_int; | |
568 | bool finalize = false; | |
569 | bool sdio_int = false; | |
570 | irqreturn_t ret = IRQ_HANDLED; | |
571 | ||
572 | spin_lock(&host->lock); | |
573 | ||
574 | idma_int = mmc_readl(host, REG_IDST); | |
575 | msk_int = mmc_readl(host, REG_MISTA); | |
576 | ||
577 | dev_dbg(mmc_dev(host->mmc), "irq: rq %p mi %08x idi %08x\n", | |
578 | host->mrq, msk_int, idma_int); | |
579 | ||
580 | mrq = host->mrq; | |
581 | if (mrq) { | |
582 | if (idma_int & SDXC_IDMAC_RECEIVE_INTERRUPT) | |
583 | host->wait_dma = false; | |
584 | ||
585 | host->int_sum |= msk_int; | |
586 | ||
587 | /* Wait for COMMAND_DONE on RESPONSE_TIMEOUT before finalize */ | |
588 | if ((host->int_sum & SDXC_RESP_TIMEOUT) && | |
589 | !(host->int_sum & SDXC_COMMAND_DONE)) | |
590 | mmc_writel(host, REG_IMASK, | |
591 | host->sdio_imask | SDXC_COMMAND_DONE); | |
592 | /* Don't wait for dma on error */ | |
593 | else if (host->int_sum & SDXC_INTERRUPT_ERROR_BIT) | |
594 | finalize = true; | |
595 | else if ((host->int_sum & SDXC_INTERRUPT_DONE_BIT) && | |
596 | !host->wait_dma) | |
597 | finalize = true; | |
598 | } | |
599 | ||
600 | if (msk_int & SDXC_SDIO_INTERRUPT) | |
601 | sdio_int = true; | |
602 | ||
603 | mmc_writel(host, REG_RINTR, msk_int); | |
604 | mmc_writel(host, REG_IDST, idma_int); | |
605 | ||
606 | if (finalize) | |
607 | ret = sunxi_mmc_finalize_request(host); | |
608 | ||
609 | spin_unlock(&host->lock); | |
610 | ||
611 | if (finalize && ret == IRQ_HANDLED) | |
612 | mmc_request_done(host->mmc, mrq); | |
613 | ||
614 | if (sdio_int) | |
615 | mmc_signal_sdio_irq(host->mmc); | |
616 | ||
617 | return ret; | |
618 | } | |
619 | ||
620 | static irqreturn_t sunxi_mmc_handle_manual_stop(int irq, void *dev_id) | |
621 | { | |
622 | struct sunxi_mmc_host *host = dev_id; | |
623 | struct mmc_request *mrq; | |
624 | unsigned long iflags; | |
625 | ||
626 | spin_lock_irqsave(&host->lock, iflags); | |
627 | mrq = host->manual_stop_mrq; | |
628 | spin_unlock_irqrestore(&host->lock, iflags); | |
629 | ||
630 | if (!mrq) { | |
631 | dev_err(mmc_dev(host->mmc), "no request for manual stop\n"); | |
632 | return IRQ_HANDLED; | |
633 | } | |
634 | ||
635 | dev_err(mmc_dev(host->mmc), "data error, sending stop command\n"); | |
dd9b3803 DL |
636 | |
637 | /* | |
638 | * We will never have more than one outstanding request, | |
639 | * and we do not complete the request until after | |
640 | * we've cleared host->manual_stop_mrq so we do not need to | |
641 | * spin lock this function. | |
642 | * Additionally we have wait states within this function | |
643 | * so having it in a lock is a very bad idea. | |
644 | */ | |
3cbcb160 DL |
645 | sunxi_mmc_send_manual_stop(host, mrq); |
646 | ||
647 | spin_lock_irqsave(&host->lock, iflags); | |
648 | host->manual_stop_mrq = NULL; | |
649 | spin_unlock_irqrestore(&host->lock, iflags); | |
650 | ||
651 | mmc_request_done(host->mmc, mrq); | |
652 | ||
653 | return IRQ_HANDLED; | |
654 | } | |
655 | ||
656 | static int sunxi_mmc_oclk_onoff(struct sunxi_mmc_host *host, u32 oclk_en) | |
657 | { | |
7bb9c244 | 658 | unsigned long expire = jiffies + msecs_to_jiffies(750); |
3cbcb160 DL |
659 | u32 rval; |
660 | ||
43c15e96 MR |
661 | dev_dbg(mmc_dev(host->mmc), "%sabling the clock\n", |
662 | oclk_en ? "en" : "dis"); | |
663 | ||
3cbcb160 | 664 | rval = mmc_readl(host, REG_CLKCR); |
16e821e3 | 665 | rval &= ~(SDXC_CARD_CLOCK_ON | SDXC_LOW_POWER_ON | SDXC_MASK_DATA0); |
3cbcb160 DL |
666 | |
667 | if (oclk_en) | |
668 | rval |= SDXC_CARD_CLOCK_ON; | |
16e821e3 MR |
669 | if (host->cfg->mask_data0) |
670 | rval |= SDXC_MASK_DATA0; | |
3cbcb160 DL |
671 | |
672 | mmc_writel(host, REG_CLKCR, rval); | |
673 | ||
674 | rval = SDXC_START | SDXC_UPCLK_ONLY | SDXC_WAIT_PRE_OVER; | |
675 | mmc_writel(host, REG_CMDR, rval); | |
676 | ||
677 | do { | |
678 | rval = mmc_readl(host, REG_CMDR); | |
679 | } while (time_before(jiffies, expire) && (rval & SDXC_START)); | |
680 | ||
681 | /* clear irq status bits set by the command */ | |
682 | mmc_writel(host, REG_RINTR, | |
683 | mmc_readl(host, REG_RINTR) & ~SDXC_SDIO_INTERRUPT); | |
684 | ||
685 | if (rval & SDXC_START) { | |
686 | dev_err(mmc_dev(host->mmc), "fatal err update clk timeout\n"); | |
687 | return -EIO; | |
688 | } | |
689 | ||
16e821e3 MR |
690 | if (host->cfg->mask_data0) { |
691 | rval = mmc_readl(host, REG_CLKCR); | |
692 | mmc_writel(host, REG_CLKCR, rval & ~SDXC_MASK_DATA0); | |
693 | } | |
694 | ||
3cbcb160 DL |
695 | return 0; |
696 | } | |
697 | ||
e1b8dfd1 IZ |
698 | static int sunxi_mmc_calibrate(struct sunxi_mmc_host *host, int reg_off) |
699 | { | |
e1b8dfd1 IZ |
700 | if (!host->cfg->can_calibrate) |
701 | return 0; | |
702 | ||
860fdf89 MR |
703 | /* |
704 | * FIXME: | |
705 | * This is not clear how the calibration is supposed to work | |
706 | * yet. The best rate have been obtained by simply setting the | |
707 | * delay to 0, as Allwinner does in its BSP. | |
708 | * | |
709 | * The only mode that doesn't have such a delay is HS400, that | |
710 | * is in itself a TODO. | |
711 | */ | |
712 | writel(SDXC_CAL_DL_SW_EN, host->reg_base + reg_off); | |
e1b8dfd1 IZ |
713 | |
714 | return 0; | |
715 | } | |
716 | ||
f2cecb70 HG |
717 | static int sunxi_mmc_clk_set_phase(struct sunxi_mmc_host *host, |
718 | struct mmc_ios *ios, u32 rate) | |
719 | { | |
720 | int index; | |
721 | ||
a6461134 | 722 | /* clk controller delays not used under new timings mode */ |
ff39e7f7 | 723 | if (host->use_new_timings) |
b465646e HG |
724 | return 0; |
725 | ||
a6461134 CYT |
726 | /* some old controllers don't support delays */ |
727 | if (!host->cfg->clk_delays) | |
728 | return 0; | |
729 | ||
f2cecb70 HG |
730 | /* determine delays */ |
731 | if (rate <= 400000) { | |
732 | index = SDXC_CLK_400K; | |
733 | } else if (rate <= 25000000) { | |
734 | index = SDXC_CLK_25M; | |
735 | } else if (rate <= 52000000) { | |
736 | if (ios->timing != MMC_TIMING_UHS_DDR50 && | |
737 | ios->timing != MMC_TIMING_MMC_DDR52) { | |
738 | index = SDXC_CLK_50M; | |
739 | } else if (ios->bus_width == MMC_BUS_WIDTH_8) { | |
740 | index = SDXC_CLK_50M_DDR_8BIT; | |
741 | } else { | |
742 | index = SDXC_CLK_50M_DDR; | |
743 | } | |
744 | } else { | |
43c15e96 | 745 | dev_dbg(mmc_dev(host->mmc), "Invalid clock... returning\n"); |
f2cecb70 HG |
746 | return -EINVAL; |
747 | } | |
748 | ||
749 | clk_set_phase(host->clk_sample, host->cfg->clk_delays[index].sample); | |
750 | clk_set_phase(host->clk_output, host->cfg->clk_delays[index].output); | |
751 | ||
752 | return 0; | |
753 | } | |
754 | ||
3cbcb160 DL |
755 | static int sunxi_mmc_clk_set_rate(struct sunxi_mmc_host *host, |
756 | struct mmc_ios *ios) | |
757 | { | |
43c15e96 | 758 | struct mmc_host *mmc = host->mmc; |
63311bec | 759 | long rate; |
c903a2ae | 760 | u32 rval, clock = ios->clock, div = 1; |
3cbcb160 DL |
761 | int ret; |
762 | ||
39cc281f MR |
763 | ret = sunxi_mmc_oclk_onoff(host, 0); |
764 | if (ret) | |
765 | return ret; | |
766 | ||
43c15e96 MR |
767 | /* Our clock is gated now */ |
768 | mmc->actual_clock = 0; | |
769 | ||
9479074e MR |
770 | if (!ios->clock) |
771 | return 0; | |
772 | ||
c903a2ae CYT |
773 | /* |
774 | * Under the old timing mode, 8 bit DDR requires the module | |
775 | * clock to be double the card clock. Under the new timing | |
776 | * mode, all DDR modes require a doubled module clock. | |
777 | * | |
778 | * We currently only support the standard MMC DDR52 mode. | |
779 | * This block should be updated once support for other DDR | |
780 | * modes is added. | |
781 | */ | |
2a7aa63a | 782 | if (ios->timing == MMC_TIMING_MMC_DDR52 && |
c903a2ae CYT |
783 | (host->use_new_timings || |
784 | ios->bus_width == MMC_BUS_WIDTH_8)) { | |
785 | div = 2; | |
2a7aa63a | 786 | clock <<= 1; |
c903a2ae | 787 | } |
2a7aa63a | 788 | |
1ff9cabd | 789 | if (host->use_new_timings && host->cfg->ccu_has_timings_switch) { |
ff39e7f7 CYT |
790 | ret = sunxi_ccu_set_mmc_timing_mode(host->clk_mmc, true); |
791 | if (ret) { | |
792 | dev_err(mmc_dev(mmc), | |
793 | "error setting new timing mode\n"); | |
794 | return ret; | |
795 | } | |
796 | } | |
797 | ||
2a7aa63a | 798 | rate = clk_round_rate(host->clk_mmc, clock); |
63311bec | 799 | if (rate < 0) { |
43c15e96 | 800 | dev_err(mmc_dev(mmc), "error rounding clk to %d: %ld\n", |
63311bec JFM |
801 | clock, rate); |
802 | return rate; | |
803 | } | |
43c15e96 | 804 | dev_dbg(mmc_dev(mmc), "setting clk to %d, rounded %ld\n", |
2a7aa63a | 805 | clock, rate); |
3cbcb160 DL |
806 | |
807 | /* setting clock rate */ | |
808 | ret = clk_set_rate(host->clk_mmc, rate); | |
809 | if (ret) { | |
43c15e96 | 810 | dev_err(mmc_dev(mmc), "error setting clk to %ld: %d\n", |
3cbcb160 DL |
811 | rate, ret); |
812 | return ret; | |
813 | } | |
814 | ||
c903a2ae | 815 | /* set internal divider */ |
3cbcb160 DL |
816 | rval = mmc_readl(host, REG_CLKCR); |
817 | rval &= ~0xff; | |
c903a2ae | 818 | rval |= div - 1; |
3cbcb160 DL |
819 | mmc_writel(host, REG_CLKCR, rval); |
820 | ||
082bb85f CYT |
821 | /* update card clock rate to account for internal divider */ |
822 | rate /= div; | |
823 | ||
1ff9cabd CYT |
824 | /* |
825 | * Configure the controller to use the new timing mode if needed. | |
826 | * On controllers that only support the new timing mode, such as | |
827 | * the eMMC controller on the A64, this register does not exist, | |
828 | * and any writes to it are ignored. | |
829 | */ | |
ff39e7f7 | 830 | if (host->use_new_timings) { |
26cb2be4 CYT |
831 | /* Don't touch the delay bits */ |
832 | rval = mmc_readl(host, REG_SD_NTSR); | |
833 | rval |= SDXC_2X_TIMING_MODE; | |
834 | mmc_writel(host, REG_SD_NTSR, rval); | |
835 | } | |
9a37e53e | 836 | |
082bb85f | 837 | /* sunxi_mmc_clk_set_phase expects the actual card clock rate */ |
f2cecb70 HG |
838 | ret = sunxi_mmc_clk_set_phase(host, ios, rate); |
839 | if (ret) | |
840 | return ret; | |
3cbcb160 | 841 | |
e1b8dfd1 IZ |
842 | ret = sunxi_mmc_calibrate(host, SDXC_REG_SAMP_DL_REG); |
843 | if (ret) | |
844 | return ret; | |
845 | ||
860fdf89 MR |
846 | /* |
847 | * FIXME: | |
848 | * | |
849 | * In HS400 we'll also need to calibrate the data strobe | |
850 | * signal. This should only happen on the MMC2 controller (at | |
851 | * least on the A64). | |
852 | */ | |
e1b8dfd1 | 853 | |
43c15e96 MR |
854 | ret = sunxi_mmc_oclk_onoff(host, 1); |
855 | if (ret) | |
856 | return ret; | |
857 | ||
858 | /* And we just enabled our clock back */ | |
082bb85f | 859 | mmc->actual_clock = rate; |
43c15e96 MR |
860 | |
861 | return 0; | |
3cbcb160 DL |
862 | } |
863 | ||
3f6c808e MR |
864 | static void sunxi_mmc_set_bus_width(struct sunxi_mmc_host *host, |
865 | unsigned char width) | |
866 | { | |
867 | switch (width) { | |
868 | case MMC_BUS_WIDTH_1: | |
869 | mmc_writel(host, REG_WIDTH, SDXC_WIDTH1); | |
870 | break; | |
871 | case MMC_BUS_WIDTH_4: | |
872 | mmc_writel(host, REG_WIDTH, SDXC_WIDTH4); | |
873 | break; | |
874 | case MMC_BUS_WIDTH_8: | |
875 | mmc_writel(host, REG_WIDTH, SDXC_WIDTH8); | |
876 | break; | |
877 | } | |
878 | } | |
879 | ||
ad04d955 MR |
880 | static void sunxi_mmc_set_clk(struct sunxi_mmc_host *host, struct mmc_ios *ios) |
881 | { | |
882 | u32 rval; | |
883 | ||
884 | /* set ddr mode */ | |
885 | rval = mmc_readl(host, REG_GCTRL); | |
886 | if (ios->timing == MMC_TIMING_UHS_DDR50 || | |
887 | ios->timing == MMC_TIMING_MMC_DDR52) | |
888 | rval |= SDXC_DDR_MODE; | |
889 | else | |
890 | rval &= ~SDXC_DDR_MODE; | |
891 | mmc_writel(host, REG_GCTRL, rval); | |
892 | ||
893 | host->ferror = sunxi_mmc_clk_set_rate(host, ios); | |
894 | /* Android code had a usleep_range(50000, 55000); here */ | |
895 | } | |
896 | ||
e27e1f3d MR |
897 | static void sunxi_mmc_card_power(struct sunxi_mmc_host *host, |
898 | struct mmc_ios *ios) | |
3cbcb160 | 899 | { |
e27e1f3d | 900 | struct mmc_host *mmc = host->mmc; |
3cbcb160 | 901 | |
3cbcb160 | 902 | switch (ios->power_mode) { |
3cbcb160 | 903 | case MMC_POWER_UP: |
e27e1f3d MR |
904 | dev_dbg(mmc_dev(mmc), "Powering card up\n"); |
905 | ||
424feb59 MR |
906 | if (!IS_ERR(mmc->supply.vmmc)) { |
907 | host->ferror = mmc_regulator_set_ocr(mmc, | |
908 | mmc->supply.vmmc, | |
909 | ios->vdd); | |
910 | if (host->ferror) | |
911 | return; | |
912 | } | |
3cbcb160 | 913 | |
f771f6e8 CYT |
914 | if (!IS_ERR(mmc->supply.vqmmc)) { |
915 | host->ferror = regulator_enable(mmc->supply.vqmmc); | |
916 | if (host->ferror) { | |
917 | dev_err(mmc_dev(mmc), | |
918 | "failed to enable vqmmc\n"); | |
919 | return; | |
920 | } | |
921 | host->vqmmc_enabled = true; | |
922 | } | |
3cbcb160 DL |
923 | break; |
924 | ||
925 | case MMC_POWER_OFF: | |
e27e1f3d MR |
926 | dev_dbg(mmc_dev(mmc), "Powering card off\n"); |
927 | ||
424feb59 MR |
928 | if (!IS_ERR(mmc->supply.vmmc)) |
929 | mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, 0); | |
930 | ||
f771f6e8 CYT |
931 | if (!IS_ERR(mmc->supply.vqmmc) && host->vqmmc_enabled) |
932 | regulator_disable(mmc->supply.vqmmc); | |
e27e1f3d | 933 | |
f771f6e8 | 934 | host->vqmmc_enabled = false; |
3cbcb160 | 935 | break; |
e27e1f3d MR |
936 | |
937 | default: | |
938 | dev_dbg(mmc_dev(mmc), "Ignoring unknown card power state\n"); | |
939 | break; | |
3cbcb160 | 940 | } |
e27e1f3d MR |
941 | } |
942 | ||
943 | static void sunxi_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) | |
944 | { | |
945 | struct sunxi_mmc_host *host = mmc_priv(mmc); | |
946 | ||
e27e1f3d | 947 | sunxi_mmc_card_power(host, ios); |
3f6c808e | 948 | sunxi_mmc_set_bus_width(host, ios->bus_width); |
ad04d955 | 949 | sunxi_mmc_set_clk(host, ios); |
3cbcb160 DL |
950 | } |
951 | ||
f771f6e8 CYT |
952 | static int sunxi_mmc_volt_switch(struct mmc_host *mmc, struct mmc_ios *ios) |
953 | { | |
9cbe0fc8 MV |
954 | int ret; |
955 | ||
f771f6e8 | 956 | /* vqmmc regulator is available */ |
9cbe0fc8 MV |
957 | if (!IS_ERR(mmc->supply.vqmmc)) { |
958 | ret = mmc_regulator_set_vqmmc(mmc, ios); | |
959 | return ret < 0 ? ret : 0; | |
960 | } | |
f771f6e8 CYT |
961 | |
962 | /* no vqmmc regulator, assume fixed regulator at 3/3.3V */ | |
963 | if (mmc->ios.signal_voltage == MMC_SIGNAL_VOLTAGE_330) | |
964 | return 0; | |
965 | ||
966 | return -EINVAL; | |
967 | } | |
968 | ||
3cbcb160 DL |
969 | static void sunxi_mmc_enable_sdio_irq(struct mmc_host *mmc, int enable) |
970 | { | |
971 | struct sunxi_mmc_host *host = mmc_priv(mmc); | |
972 | unsigned long flags; | |
973 | u32 imask; | |
974 | ||
9a8e1e8c MR |
975 | if (enable) |
976 | pm_runtime_get_noresume(host->dev); | |
977 | ||
3cbcb160 DL |
978 | spin_lock_irqsave(&host->lock, flags); |
979 | ||
980 | imask = mmc_readl(host, REG_IMASK); | |
981 | if (enable) { | |
982 | host->sdio_imask = SDXC_SDIO_INTERRUPT; | |
983 | imask |= SDXC_SDIO_INTERRUPT; | |
984 | } else { | |
985 | host->sdio_imask = 0; | |
986 | imask &= ~SDXC_SDIO_INTERRUPT; | |
987 | } | |
988 | mmc_writel(host, REG_IMASK, imask); | |
989 | spin_unlock_irqrestore(&host->lock, flags); | |
9a8e1e8c MR |
990 | |
991 | if (!enable) | |
992 | pm_runtime_put_noidle(host->mmc->parent); | |
3cbcb160 DL |
993 | } |
994 | ||
995 | static void sunxi_mmc_hw_reset(struct mmc_host *mmc) | |
996 | { | |
997 | struct sunxi_mmc_host *host = mmc_priv(mmc); | |
998 | mmc_writel(host, REG_HWRST, 0); | |
999 | udelay(10); | |
1000 | mmc_writel(host, REG_HWRST, 1); | |
1001 | udelay(300); | |
1002 | } | |
1003 | ||
1004 | static void sunxi_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq) | |
1005 | { | |
1006 | struct sunxi_mmc_host *host = mmc_priv(mmc); | |
1007 | struct mmc_command *cmd = mrq->cmd; | |
1008 | struct mmc_data *data = mrq->data; | |
1009 | unsigned long iflags; | |
1010 | u32 imask = SDXC_INTERRUPT_ERROR_BIT; | |
1011 | u32 cmd_val = SDXC_START | (cmd->opcode & 0x3f); | |
dd9b3803 | 1012 | bool wait_dma = host->wait_dma; |
3cbcb160 DL |
1013 | int ret; |
1014 | ||
1015 | /* Check for set_ios errors (should never happen) */ | |
1016 | if (host->ferror) { | |
1017 | mrq->cmd->error = host->ferror; | |
1018 | mmc_request_done(mmc, mrq); | |
1019 | return; | |
1020 | } | |
1021 | ||
1022 | if (data) { | |
1023 | ret = sunxi_mmc_map_dma(host, data); | |
1024 | if (ret < 0) { | |
1025 | dev_err(mmc_dev(mmc), "map DMA failed\n"); | |
1026 | cmd->error = ret; | |
1027 | data->error = ret; | |
1028 | mmc_request_done(mmc, mrq); | |
1029 | return; | |
1030 | } | |
1031 | } | |
1032 | ||
1033 | if (cmd->opcode == MMC_GO_IDLE_STATE) { | |
1034 | cmd_val |= SDXC_SEND_INIT_SEQUENCE; | |
1035 | imask |= SDXC_COMMAND_DONE; | |
1036 | } | |
1037 | ||
1038 | if (cmd->flags & MMC_RSP_PRESENT) { | |
1039 | cmd_val |= SDXC_RESP_EXPIRE; | |
1040 | if (cmd->flags & MMC_RSP_136) | |
1041 | cmd_val |= SDXC_LONG_RESPONSE; | |
1042 | if (cmd->flags & MMC_RSP_CRC) | |
1043 | cmd_val |= SDXC_CHECK_RESPONSE_CRC; | |
1044 | ||
1045 | if ((cmd->flags & MMC_CMD_MASK) == MMC_CMD_ADTC) { | |
1046 | cmd_val |= SDXC_DATA_EXPIRE | SDXC_WAIT_PRE_OVER; | |
3cbcb160 DL |
1047 | |
1048 | if (cmd->data->stop) { | |
1049 | imask |= SDXC_AUTO_COMMAND_DONE; | |
1050 | cmd_val |= SDXC_SEND_AUTO_STOP; | |
1051 | } else { | |
1052 | imask |= SDXC_DATA_OVER; | |
1053 | } | |
1054 | ||
1055 | if (cmd->data->flags & MMC_DATA_WRITE) | |
1056 | cmd_val |= SDXC_WRITE; | |
1057 | else | |
dd9b3803 | 1058 | wait_dma = true; |
3cbcb160 DL |
1059 | } else { |
1060 | imask |= SDXC_COMMAND_DONE; | |
1061 | } | |
1062 | } else { | |
1063 | imask |= SDXC_COMMAND_DONE; | |
1064 | } | |
1065 | ||
1066 | dev_dbg(mmc_dev(mmc), "cmd %d(%08x) arg %x ie 0x%08x len %d\n", | |
1067 | cmd_val & 0x3f, cmd_val, cmd->arg, imask, | |
1068 | mrq->data ? mrq->data->blksz * mrq->data->blocks : 0); | |
1069 | ||
1070 | spin_lock_irqsave(&host->lock, iflags); | |
1071 | ||
1072 | if (host->mrq || host->manual_stop_mrq) { | |
1073 | spin_unlock_irqrestore(&host->lock, iflags); | |
1074 | ||
1075 | if (data) | |
1076 | dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len, | |
feeef096 | 1077 | mmc_get_dma_dir(data)); |
3cbcb160 DL |
1078 | |
1079 | dev_err(mmc_dev(mmc), "request already pending\n"); | |
1080 | mrq->cmd->error = -EBUSY; | |
1081 | mmc_request_done(mmc, mrq); | |
1082 | return; | |
1083 | } | |
1084 | ||
1085 | if (data) { | |
1086 | mmc_writel(host, REG_BLKSZ, data->blksz); | |
1087 | mmc_writel(host, REG_BCNTR, data->blksz * data->blocks); | |
1088 | sunxi_mmc_start_dma(host, data); | |
1089 | } | |
1090 | ||
1091 | host->mrq = mrq; | |
dd9b3803 | 1092 | host->wait_dma = wait_dma; |
3cbcb160 DL |
1093 | mmc_writel(host, REG_IMASK, host->sdio_imask | imask); |
1094 | mmc_writel(host, REG_CARG, cmd->arg); | |
1095 | mmc_writel(host, REG_CMDR, cmd_val); | |
1096 | ||
1097 | spin_unlock_irqrestore(&host->lock, iflags); | |
1098 | } | |
1099 | ||
c1590dd8 HG |
1100 | static int sunxi_mmc_card_busy(struct mmc_host *mmc) |
1101 | { | |
1102 | struct sunxi_mmc_host *host = mmc_priv(mmc); | |
1103 | ||
1104 | return !!(mmc_readl(host, REG_STAS) & SDXC_CARD_DATA_BUSY); | |
1105 | } | |
1106 | ||
1f8029c3 | 1107 | static const struct mmc_host_ops sunxi_mmc_ops = { |
3cbcb160 DL |
1108 | .request = sunxi_mmc_request, |
1109 | .set_ios = sunxi_mmc_set_ios, | |
1110 | .get_ro = mmc_gpio_get_ro, | |
1111 | .get_cd = mmc_gpio_get_cd, | |
1112 | .enable_sdio_irq = sunxi_mmc_enable_sdio_irq, | |
f771f6e8 | 1113 | .start_signal_voltage_switch = sunxi_mmc_volt_switch, |
3cbcb160 | 1114 | .hw_reset = sunxi_mmc_hw_reset, |
c1590dd8 | 1115 | .card_busy = sunxi_mmc_card_busy, |
3cbcb160 DL |
1116 | }; |
1117 | ||
51424b28 HG |
1118 | static const struct sunxi_mmc_clk_delay sunxi_mmc_clk_delays[] = { |
1119 | [SDXC_CLK_400K] = { .output = 180, .sample = 180 }, | |
1120 | [SDXC_CLK_25M] = { .output = 180, .sample = 75 }, | |
1121 | [SDXC_CLK_50M] = { .output = 90, .sample = 120 }, | |
1122 | [SDXC_CLK_50M_DDR] = { .output = 60, .sample = 120 }, | |
2a7aa63a CYT |
1123 | /* Value from A83T "new timing mode". Works but might not be right. */ |
1124 | [SDXC_CLK_50M_DDR_8BIT] = { .output = 90, .sample = 180 }, | |
51424b28 HG |
1125 | }; |
1126 | ||
1127 | static const struct sunxi_mmc_clk_delay sun9i_mmc_clk_delays[] = { | |
1128 | [SDXC_CLK_400K] = { .output = 180, .sample = 180 }, | |
1129 | [SDXC_CLK_25M] = { .output = 180, .sample = 75 }, | |
1130 | [SDXC_CLK_50M] = { .output = 150, .sample = 120 }, | |
0175249e CYT |
1131 | [SDXC_CLK_50M_DDR] = { .output = 54, .sample = 36 }, |
1132 | [SDXC_CLK_50M_DDR_8BIT] = { .output = 72, .sample = 72 }, | |
51424b28 HG |
1133 | }; |
1134 | ||
86a93317 HG |
1135 | static const struct sunxi_mmc_cfg sun4i_a10_cfg = { |
1136 | .idma_des_size_bits = 13, | |
b465646e | 1137 | .clk_delays = NULL, |
e1b8dfd1 | 1138 | .can_calibrate = false, |
86a93317 HG |
1139 | }; |
1140 | ||
1141 | static const struct sunxi_mmc_cfg sun5i_a13_cfg = { | |
b465646e HG |
1142 | .idma_des_size_bits = 16, |
1143 | .clk_delays = NULL, | |
e1b8dfd1 | 1144 | .can_calibrate = false, |
b465646e HG |
1145 | }; |
1146 | ||
1147 | static const struct sunxi_mmc_cfg sun7i_a20_cfg = { | |
86a93317 HG |
1148 | .idma_des_size_bits = 16, |
1149 | .clk_delays = sunxi_mmc_clk_delays, | |
e1b8dfd1 | 1150 | .can_calibrate = false, |
86a93317 HG |
1151 | }; |
1152 | ||
ac98caef CYT |
1153 | static const struct sunxi_mmc_cfg sun8i_a83t_emmc_cfg = { |
1154 | .idma_des_size_bits = 16, | |
1155 | .clk_delays = sunxi_mmc_clk_delays, | |
1156 | .can_calibrate = false, | |
1ff9cabd | 1157 | .ccu_has_timings_switch = true, |
ac98caef CYT |
1158 | }; |
1159 | ||
86a93317 HG |
1160 | static const struct sunxi_mmc_cfg sun9i_a80_cfg = { |
1161 | .idma_des_size_bits = 16, | |
1162 | .clk_delays = sun9i_mmc_clk_delays, | |
e1b8dfd1 IZ |
1163 | .can_calibrate = false, |
1164 | }; | |
1165 | ||
1166 | static const struct sunxi_mmc_cfg sun50i_a64_cfg = { | |
1167 | .idma_des_size_bits = 16, | |
1168 | .clk_delays = NULL, | |
1169 | .can_calibrate = true, | |
16e821e3 | 1170 | .mask_data0 = true, |
9a37e53e | 1171 | .needs_new_timings = true, |
86a93317 HG |
1172 | }; |
1173 | ||
4fb3ce07 MR |
1174 | static const struct sunxi_mmc_cfg sun50i_a64_emmc_cfg = { |
1175 | .idma_des_size_bits = 13, | |
1176 | .clk_delays = NULL, | |
1177 | .can_calibrate = true, | |
07bafc1e | 1178 | .needs_new_timings = true, |
4fb3ce07 MR |
1179 | }; |
1180 | ||
86a93317 HG |
1181 | static const struct of_device_id sunxi_mmc_of_match[] = { |
1182 | { .compatible = "allwinner,sun4i-a10-mmc", .data = &sun4i_a10_cfg }, | |
1183 | { .compatible = "allwinner,sun5i-a13-mmc", .data = &sun5i_a13_cfg }, | |
b465646e | 1184 | { .compatible = "allwinner,sun7i-a20-mmc", .data = &sun7i_a20_cfg }, |
ac98caef | 1185 | { .compatible = "allwinner,sun8i-a83t-emmc", .data = &sun8i_a83t_emmc_cfg }, |
86a93317 | 1186 | { .compatible = "allwinner,sun9i-a80-mmc", .data = &sun9i_a80_cfg }, |
e1b8dfd1 | 1187 | { .compatible = "allwinner,sun50i-a64-mmc", .data = &sun50i_a64_cfg }, |
4fb3ce07 | 1188 | { .compatible = "allwinner,sun50i-a64-emmc", .data = &sun50i_a64_emmc_cfg }, |
86a93317 HG |
1189 | { /* sentinel */ } |
1190 | }; | |
1191 | MODULE_DEVICE_TABLE(of, sunxi_mmc_of_match); | |
1192 | ||
774c0103 MR |
1193 | static int sunxi_mmc_enable(struct sunxi_mmc_host *host) |
1194 | { | |
1195 | int ret; | |
1196 | ||
d8181941 MR |
1197 | if (!IS_ERR(host->reset)) { |
1198 | ret = reset_control_reset(host->reset); | |
1199 | if (ret) { | |
1200 | dev_err(host->dev, "Couldn't reset the MMC controller (%d)\n", | |
1201 | ret); | |
1202 | return ret; | |
1203 | } | |
1204 | } | |
1205 | ||
774c0103 MR |
1206 | ret = clk_prepare_enable(host->clk_ahb); |
1207 | if (ret) { | |
d8181941 MR |
1208 | dev_err(host->dev, "Couldn't enable the bus clocks (%d)\n", ret); |
1209 | goto error_assert_reset; | |
774c0103 MR |
1210 | } |
1211 | ||
1212 | ret = clk_prepare_enable(host->clk_mmc); | |
1213 | if (ret) { | |
1214 | dev_err(host->dev, "Enable mmc clk err %d\n", ret); | |
1215 | goto error_disable_clk_ahb; | |
1216 | } | |
1217 | ||
1218 | ret = clk_prepare_enable(host->clk_output); | |
1219 | if (ret) { | |
1220 | dev_err(host->dev, "Enable output clk err %d\n", ret); | |
1221 | goto error_disable_clk_mmc; | |
1222 | } | |
1223 | ||
1224 | ret = clk_prepare_enable(host->clk_sample); | |
1225 | if (ret) { | |
1226 | dev_err(host->dev, "Enable sample clk err %d\n", ret); | |
1227 | goto error_disable_clk_output; | |
1228 | } | |
1229 | ||
774c0103 MR |
1230 | /* |
1231 | * Sometimes the controller asserts the irq on boot for some reason, | |
1232 | * make sure the controller is in a sane state before enabling irqs. | |
1233 | */ | |
1234 | ret = sunxi_mmc_reset_host(host); | |
1235 | if (ret) | |
d8181941 | 1236 | goto error_disable_clk_sample; |
774c0103 MR |
1237 | |
1238 | return 0; | |
1239 | ||
774c0103 MR |
1240 | error_disable_clk_sample: |
1241 | clk_disable_unprepare(host->clk_sample); | |
1242 | error_disable_clk_output: | |
1243 | clk_disable_unprepare(host->clk_output); | |
1244 | error_disable_clk_mmc: | |
1245 | clk_disable_unprepare(host->clk_mmc); | |
1246 | error_disable_clk_ahb: | |
1247 | clk_disable_unprepare(host->clk_ahb); | |
d8181941 MR |
1248 | error_assert_reset: |
1249 | if (!IS_ERR(host->reset)) | |
1250 | reset_control_assert(host->reset); | |
774c0103 MR |
1251 | return ret; |
1252 | } | |
1253 | ||
1254 | static void sunxi_mmc_disable(struct sunxi_mmc_host *host) | |
1255 | { | |
1256 | sunxi_mmc_reset_host(host); | |
1257 | ||
774c0103 MR |
1258 | clk_disable_unprepare(host->clk_sample); |
1259 | clk_disable_unprepare(host->clk_output); | |
1260 | clk_disable_unprepare(host->clk_mmc); | |
1261 | clk_disable_unprepare(host->clk_ahb); | |
d8181941 MR |
1262 | |
1263 | if (!IS_ERR(host->reset)) | |
1264 | reset_control_assert(host->reset); | |
774c0103 MR |
1265 | } |
1266 | ||
3cbcb160 DL |
1267 | static int sunxi_mmc_resource_request(struct sunxi_mmc_host *host, |
1268 | struct platform_device *pdev) | |
1269 | { | |
3cbcb160 DL |
1270 | int ret; |
1271 | ||
86a93317 HG |
1272 | host->cfg = of_device_get_match_data(&pdev->dev); |
1273 | if (!host->cfg) | |
1274 | return -EINVAL; | |
51424b28 | 1275 | |
3cbcb160 | 1276 | ret = mmc_regulator_get_supply(host->mmc); |
aaab3c46 | 1277 | if (ret) |
3cbcb160 | 1278 | return ret; |
3cbcb160 | 1279 | |
c5c52c37 | 1280 | host->reg_base = devm_platform_ioremap_resource(pdev, 0); |
3cbcb160 DL |
1281 | if (IS_ERR(host->reg_base)) |
1282 | return PTR_ERR(host->reg_base); | |
1283 | ||
1284 | host->clk_ahb = devm_clk_get(&pdev->dev, "ahb"); | |
1285 | if (IS_ERR(host->clk_ahb)) { | |
1286 | dev_err(&pdev->dev, "Could not get ahb clock\n"); | |
1287 | return PTR_ERR(host->clk_ahb); | |
1288 | } | |
1289 | ||
1290 | host->clk_mmc = devm_clk_get(&pdev->dev, "mmc"); | |
1291 | if (IS_ERR(host->clk_mmc)) { | |
1292 | dev_err(&pdev->dev, "Could not get mmc clock\n"); | |
1293 | return PTR_ERR(host->clk_mmc); | |
1294 | } | |
1295 | ||
b465646e HG |
1296 | if (host->cfg->clk_delays) { |
1297 | host->clk_output = devm_clk_get(&pdev->dev, "output"); | |
1298 | if (IS_ERR(host->clk_output)) { | |
1299 | dev_err(&pdev->dev, "Could not get output clock\n"); | |
1300 | return PTR_ERR(host->clk_output); | |
1301 | } | |
6c09bb85 | 1302 | |
b465646e HG |
1303 | host->clk_sample = devm_clk_get(&pdev->dev, "sample"); |
1304 | if (IS_ERR(host->clk_sample)) { | |
1305 | dev_err(&pdev->dev, "Could not get sample clock\n"); | |
1306 | return PTR_ERR(host->clk_sample); | |
1307 | } | |
6c09bb85 MR |
1308 | } |
1309 | ||
5e40ddac PZ |
1310 | host->reset = devm_reset_control_get_optional_exclusive(&pdev->dev, |
1311 | "ahb"); | |
9e71c589 CYT |
1312 | if (PTR_ERR(host->reset) == -EPROBE_DEFER) |
1313 | return PTR_ERR(host->reset); | |
3cbcb160 | 1314 | |
774c0103 | 1315 | ret = sunxi_mmc_enable(host); |
3cbcb160 | 1316 | if (ret) |
774c0103 | 1317 | return ret; |
3cbcb160 DL |
1318 | |
1319 | host->irq = platform_get_irq(pdev, 0); | |
2408a085 AY |
1320 | if (host->irq <= 0) { |
1321 | ret = -EINVAL; | |
774c0103 | 1322 | goto error_disable_mmc; |
2408a085 AY |
1323 | } |
1324 | ||
3cbcb160 DL |
1325 | return devm_request_threaded_irq(&pdev->dev, host->irq, sunxi_mmc_irq, |
1326 | sunxi_mmc_handle_manual_stop, 0, "sunxi-mmc", host); | |
1327 | ||
774c0103 MR |
1328 | error_disable_mmc: |
1329 | sunxi_mmc_disable(host); | |
3cbcb160 DL |
1330 | return ret; |
1331 | } | |
1332 | ||
1333 | static int sunxi_mmc_probe(struct platform_device *pdev) | |
1334 | { | |
1335 | struct sunxi_mmc_host *host; | |
1336 | struct mmc_host *mmc; | |
1337 | int ret; | |
1338 | ||
1339 | mmc = mmc_alloc_host(sizeof(struct sunxi_mmc_host), &pdev->dev); | |
1340 | if (!mmc) { | |
1341 | dev_err(&pdev->dev, "mmc alloc host failed\n"); | |
1342 | return -ENOMEM; | |
1343 | } | |
cb1214d2 | 1344 | platform_set_drvdata(pdev, mmc); |
3cbcb160 DL |
1345 | |
1346 | host = mmc_priv(mmc); | |
774c0103 | 1347 | host->dev = &pdev->dev; |
3cbcb160 DL |
1348 | host->mmc = mmc; |
1349 | spin_lock_init(&host->lock); | |
1350 | ||
1351 | ret = sunxi_mmc_resource_request(host, pdev); | |
1352 | if (ret) | |
1353 | goto error_free_host; | |
1354 | ||
1355 | host->sg_cpu = dma_alloc_coherent(&pdev->dev, PAGE_SIZE, | |
1356 | &host->sg_dma, GFP_KERNEL); | |
1357 | if (!host->sg_cpu) { | |
1358 | dev_err(&pdev->dev, "Failed to allocate DMA descriptor mem\n"); | |
1359 | ret = -ENOMEM; | |
1360 | goto error_free_host; | |
1361 | } | |
1362 | ||
1ff9cabd | 1363 | if (host->cfg->ccu_has_timings_switch) { |
ff39e7f7 CYT |
1364 | /* |
1365 | * Supports both old and new timing modes. | |
1366 | * Try setting the clk to new timing mode. | |
1367 | */ | |
1368 | sunxi_ccu_set_mmc_timing_mode(host->clk_mmc, true); | |
1369 | ||
1370 | /* And check the result */ | |
1371 | ret = sunxi_ccu_get_mmc_timing_mode(host->clk_mmc); | |
1372 | if (ret < 0) { | |
1373 | /* | |
1374 | * For whatever reason we were not able to get | |
1375 | * the current active mode. Default to old mode. | |
1376 | */ | |
1377 | dev_warn(&pdev->dev, "MMC clk timing mode unknown\n"); | |
1378 | host->use_new_timings = false; | |
1379 | } else { | |
1380 | host->use_new_timings = !!ret; | |
1381 | } | |
1382 | } else if (host->cfg->needs_new_timings) { | |
1383 | /* Supports new timing mode only */ | |
1384 | host->use_new_timings = true; | |
1385 | } | |
1386 | ||
3cbcb160 DL |
1387 | mmc->ops = &sunxi_mmc_ops; |
1388 | mmc->max_blk_count = 8192; | |
1389 | mmc->max_blk_size = 4096; | |
1390 | mmc->max_segs = PAGE_SIZE / sizeof(struct sunxi_idma_des); | |
86a93317 | 1391 | mmc->max_seg_size = (1 << host->cfg->idma_des_size_bits); |
3cbcb160 | 1392 | mmc->max_req_size = mmc->max_seg_size * mmc->max_segs; |
2dcb305a | 1393 | /* 400kHz ~ 52MHz */ |
3cbcb160 | 1394 | mmc->f_min = 400000; |
2dcb305a | 1395 | mmc->f_max = 52000000; |
3df01a93 | 1396 | mmc->caps |= MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED | |
1be64c79 | 1397 | MMC_CAP_SDIO_IRQ; |
3cbcb160 | 1398 | |
d49d92ac CYT |
1399 | /* |
1400 | * Some H5 devices do not have signal traces precise enough to | |
1401 | * use HS DDR mode for their eMMC chips. | |
1402 | * | |
1403 | * We still enable HS DDR modes for all the other controller | |
1404 | * variants that support them. | |
1405 | */ | |
1406 | if ((host->cfg->clk_delays || host->use_new_timings) && | |
1407 | !of_device_is_compatible(pdev->dev.of_node, | |
1408 | "allwinner,sun50i-h5-emmc")) | |
88023d43 | 1409 | mmc->caps |= MMC_CAP_1_8V_DDR | MMC_CAP_3_3V_DDR; |
b465646e | 1410 | |
3cbcb160 | 1411 | ret = mmc_of_parse(mmc); |
eef797ac MR |
1412 | if (ret) |
1413 | goto error_free_dma; | |
1414 | ||
d6f11e7d CYT |
1415 | /* |
1416 | * If we don't support delay chains in the SoC, we can't use any | |
1417 | * of the higher speed modes. Mask them out in case the device | |
1418 | * tree specifies the properties for them, which gets added to | |
1419 | * the caps by mmc_of_parse() above. | |
1420 | */ | |
1421 | if (!(host->cfg->clk_delays || host->use_new_timings)) { | |
1422 | mmc->caps &= ~(MMC_CAP_3_3V_DDR | MMC_CAP_1_8V_DDR | | |
1423 | MMC_CAP_1_2V_DDR | MMC_CAP_UHS); | |
1424 | mmc->caps2 &= ~MMC_CAP2_HS200; | |
1425 | } | |
1426 | ||
1427 | /* TODO: This driver doesn't support HS400 mode yet */ | |
1428 | mmc->caps2 &= ~MMC_CAP2_HS400; | |
1429 | ||
eef797ac | 1430 | ret = sunxi_mmc_init_host(host); |
3cbcb160 DL |
1431 | if (ret) |
1432 | goto error_free_dma; | |
1433 | ||
9a8e1e8c MR |
1434 | pm_runtime_set_active(&pdev->dev); |
1435 | pm_runtime_set_autosuspend_delay(&pdev->dev, 50); | |
1436 | pm_runtime_use_autosuspend(&pdev->dev); | |
1437 | pm_runtime_enable(&pdev->dev); | |
1438 | ||
3cbcb160 DL |
1439 | ret = mmc_add_host(mmc); |
1440 | if (ret) | |
1441 | goto error_free_dma; | |
1442 | ||
1389690b AP |
1443 | dev_info(&pdev->dev, "initialized, max. request size: %u KB%s\n", |
1444 | mmc->max_req_size >> 10, | |
1445 | host->use_new_timings ? ", uses new timings mode" : ""); | |
1446 | ||
3cbcb160 DL |
1447 | return 0; |
1448 | ||
1449 | error_free_dma: | |
1450 | dma_free_coherent(&pdev->dev, PAGE_SIZE, host->sg_cpu, host->sg_dma); | |
1451 | error_free_host: | |
1452 | mmc_free_host(mmc); | |
1453 | return ret; | |
1454 | } | |
1455 | ||
1456 | static int sunxi_mmc_remove(struct platform_device *pdev) | |
1457 | { | |
1458 | struct mmc_host *mmc = platform_get_drvdata(pdev); | |
1459 | struct sunxi_mmc_host *host = mmc_priv(mmc); | |
1460 | ||
1461 | mmc_remove_host(mmc); | |
9a8e1e8c | 1462 | pm_runtime_force_suspend(&pdev->dev); |
3cbcb160 | 1463 | disable_irq(host->irq); |
774c0103 | 1464 | sunxi_mmc_disable(host); |
3cbcb160 DL |
1465 | dma_free_coherent(&pdev->dev, PAGE_SIZE, host->sg_cpu, host->sg_dma); |
1466 | mmc_free_host(mmc); | |
1467 | ||
1468 | return 0; | |
1469 | } | |
1470 | ||
af6b8ff4 UH |
1471 | #ifdef CONFIG_PM |
1472 | static int sunxi_mmc_runtime_resume(struct device *dev) | |
9a8e1e8c MR |
1473 | { |
1474 | struct mmc_host *mmc = dev_get_drvdata(dev); | |
1475 | struct sunxi_mmc_host *host = mmc_priv(mmc); | |
1476 | int ret; | |
1477 | ||
1478 | ret = sunxi_mmc_enable(host); | |
1479 | if (ret) | |
1480 | return ret; | |
1481 | ||
1482 | sunxi_mmc_init_host(host); | |
1483 | sunxi_mmc_set_bus_width(host, mmc->ios.bus_width); | |
1484 | sunxi_mmc_set_clk(host, &mmc->ios); | |
b8ba3578 | 1485 | enable_irq(host->irq); |
9a8e1e8c MR |
1486 | |
1487 | return 0; | |
1488 | } | |
1489 | ||
af6b8ff4 | 1490 | static int sunxi_mmc_runtime_suspend(struct device *dev) |
9a8e1e8c MR |
1491 | { |
1492 | struct mmc_host *mmc = dev_get_drvdata(dev); | |
1493 | struct sunxi_mmc_host *host = mmc_priv(mmc); | |
1494 | ||
b8ba3578 SM |
1495 | /* |
1496 | * When clocks are off, it's possible receiving | |
1497 | * fake interrupts, which will stall the system. | |
1498 | * Disabling the irq will prevent this. | |
1499 | */ | |
1500 | disable_irq(host->irq); | |
9a8e1e8c MR |
1501 | sunxi_mmc_reset_host(host); |
1502 | sunxi_mmc_disable(host); | |
1503 | ||
1504 | return 0; | |
1505 | } | |
af6b8ff4 | 1506 | #endif |
9a8e1e8c MR |
1507 | |
1508 | static const struct dev_pm_ops sunxi_mmc_pm_ops = { | |
1509 | SET_RUNTIME_PM_OPS(sunxi_mmc_runtime_suspend, | |
1510 | sunxi_mmc_runtime_resume, | |
1511 | NULL) | |
1512 | }; | |
1513 | ||
3cbcb160 DL |
1514 | static struct platform_driver sunxi_mmc_driver = { |
1515 | .driver = { | |
1516 | .name = "sunxi-mmc", | |
21b2cec6 | 1517 | .probe_type = PROBE_PREFER_ASYNCHRONOUS, |
3cbcb160 | 1518 | .of_match_table = of_match_ptr(sunxi_mmc_of_match), |
9a8e1e8c | 1519 | .pm = &sunxi_mmc_pm_ops, |
3cbcb160 DL |
1520 | }, |
1521 | .probe = sunxi_mmc_probe, | |
1522 | .remove = sunxi_mmc_remove, | |
1523 | }; | |
1524 | module_platform_driver(sunxi_mmc_driver); | |
1525 | ||
1526 | MODULE_DESCRIPTION("Allwinner's SD/MMC Card Controller Driver"); | |
1527 | MODULE_LICENSE("GPL v2"); | |
1907e386 | 1528 | MODULE_AUTHOR("David Lanzendörfer <david.lanzendoerfer@o2s.ch>"); |
3cbcb160 | 1529 | MODULE_ALIAS("platform:sunxi-mmc"); |