1 /*
2 * drivers/mmc/host/via-sdmmc.c - VIA SD/MMC Card Reader driver
3 * Copyright (c) 2008, VIA Technologies Inc. All Rights Reserved.
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or (at
8 * your option) any later version.
9 */
10
11 #include <linux/pci.h>
12 #include <linux/dma-mapping.h>
13 #include <linux/highmem.h>
14 #include <linux/delay.h>
15
16 #include <linux/mmc/host.h>
17
18 #define DRV_NAME "via_sdmmc"
19
20 #define PCI_DEVICE_ID_VIA_9530 0x9530
21
22 #define VIA_CRDR_SDC_OFF 0x200
23 #define VIA_CRDR_DDMA_OFF 0x400
24 #define VIA_CRDR_PCICTRL_OFF 0x600
25
26 #define VIA_CRDR_MIN_CLOCK 375000
27 #define VIA_CRDR_MAX_CLOCK 48000000
28
29 /*
30 * PCI registers
31 */
32
33 #define VIA_CRDR_PCI_WORK_MODE 0x40
34 #define VIA_CRDR_PCI_DBG_MODE 0x41
35
36 /*
37 * SDC MMIO Registers
38 */
39
40 #define VIA_CRDR_SDCTRL 0x0
41 #define VIA_CRDR_SDCTRL_START 0x01
42 #define VIA_CRDR_SDCTRL_WRITE 0x04
43 #define VIA_CRDR_SDCTRL_SINGLE_WR 0x10
44 #define VIA_CRDR_SDCTRL_SINGLE_RD 0x20
45 #define VIA_CRDR_SDCTRL_MULTI_WR 0x30
46 #define VIA_CRDR_SDCTRL_MULTI_RD 0x40
47 #define VIA_CRDR_SDCTRL_STOP 0x70
48
49 #define VIA_CRDR_SDCTRL_RSP_NONE 0x0
50 #define VIA_CRDR_SDCTRL_RSP_R1 0x10000
51 #define VIA_CRDR_SDCTRL_RSP_R2 0x20000
52 #define VIA_CRDR_SDCTRL_RSP_R3 0x30000
53 #define VIA_CRDR_SDCTRL_RSP_R1B 0x90000
54
55 #define VIA_CRDR_SDCARG 0x4
56
57 #define VIA_CRDR_SDBUSMODE 0x8
58 #define VIA_CRDR_SDMODE_4BIT 0x02
59 #define VIA_CRDR_SDMODE_CLK_ON 0x40
60
61 #define VIA_CRDR_SDBLKLEN 0xc
62 /*
63 * Bit 0 -Bit 10 : Block length. So, the maximum block length should be 2048.
64 * Bit 11 - Bit 13 : Reserved.
65 * GPIDET : Select GPI pin to detect card, GPI means CR_CD# in top design.
66 * INTEN : Enable SD host interrupt.
67 * Bit 16 - Bit 31 : Block count. So, the maximun block count should be 65536.
68 */
69 #define VIA_CRDR_SDBLKLEN_GPIDET 0x2000
70 #define VIA_CRDR_SDBLKLEN_INTEN 0x8000
71 #define VIA_CRDR_MAX_BLOCK_COUNT 65536
72 #define VIA_CRDR_MAX_BLOCK_LENGTH 2048
73
74 #define VIA_CRDR_SDRESP0 0x10
75 #define VIA_CRDR_SDRESP1 0x14
76 #define VIA_CRDR_SDRESP2 0x18
77 #define VIA_CRDR_SDRESP3 0x1c
78
79 #define VIA_CRDR_SDCURBLKCNT 0x20
80
81 #define VIA_CRDR_SDINTMASK 0x24
82 /*
83 * MBDIE : Multiple Blocks transfer Done Interrupt Enable
84 * BDDIE : Block Data transfer Done Interrupt Enable
85 * CIRIE : Card Insertion or Removal Interrupt Enable
86 * CRDIE : Command-Response transfer Done Interrupt Enable
87 * CRTOIE : Command-Response response TimeOut Interrupt Enable
88 * ASCRDIE : Auto Stop Command-Response transfer Done Interrupt Enable
89 * DTIE : Data access Timeout Interrupt Enable
90 * SCIE : reSponse CRC error Interrupt Enable
91 * RCIE : Read data CRC error Interrupt Enable
92 * WCIE : Write data CRC error Interrupt Enable
93 */
94 #define VIA_CRDR_SDINTMASK_MBDIE 0x10
95 #define VIA_CRDR_SDINTMASK_BDDIE 0x20
96 #define VIA_CRDR_SDINTMASK_CIRIE 0x80
97 #define VIA_CRDR_SDINTMASK_CRDIE 0x200
98 #define VIA_CRDR_SDINTMASK_CRTOIE 0x400
99 #define VIA_CRDR_SDINTMASK_ASCRDIE 0x800
100 #define VIA_CRDR_SDINTMASK_DTIE 0x1000
101 #define VIA_CRDR_SDINTMASK_SCIE 0x2000
102 #define VIA_CRDR_SDINTMASK_RCIE 0x4000
103 #define VIA_CRDR_SDINTMASK_WCIE 0x8000
104
105 #define VIA_CRDR_SDACTIVE_INTMASK \
106 (VIA_CRDR_SDINTMASK_MBDIE | VIA_CRDR_SDINTMASK_CIRIE \
107 | VIA_CRDR_SDINTMASK_CRDIE | VIA_CRDR_SDINTMASK_CRTOIE \
108 | VIA_CRDR_SDINTMASK_DTIE | VIA_CRDR_SDINTMASK_SCIE \
109 | VIA_CRDR_SDINTMASK_RCIE | VIA_CRDR_SDINTMASK_WCIE)
110
111 #define VIA_CRDR_SDSTATUS 0x28
112 /*
113 * CECC : Reserved
114 * WP : SD card Write Protect status
115 * SLOTD : Reserved
116 * SLOTG : SD SLOT status(Gpi pin status)
117 * MBD : Multiple Blocks transfer Done interrupt status
118 * BDD : Block Data transfer Done interrupt status
119 * CD : Reserved
120 * CIR : Card Insertion or Removal interrupt detected on GPI pin
121 * IO : Reserved
122 * CRD : Command-Response transfer Done interrupt status
123 * CRTO : Command-Response response TimeOut interrupt status
124 * ASCRDIE : Auto Stop Command-Response transfer Done interrupt status
125 * DT : Data access Timeout interrupt status
126 * SC : reSponse CRC error interrupt status
127 * RC : Read data CRC error interrupt status
128 * WC : Write data CRC error interrupt status
129 */
130 #define VIA_CRDR_SDSTS_CECC 0x01
131 #define VIA_CRDR_SDSTS_WP 0x02
132 #define VIA_CRDR_SDSTS_SLOTD 0x04
133 #define VIA_CRDR_SDSTS_SLOTG 0x08
134 #define VIA_CRDR_SDSTS_MBD 0x10
135 #define VIA_CRDR_SDSTS_BDD 0x20
136 #define VIA_CRDR_SDSTS_CD 0x40
137 #define VIA_CRDR_SDSTS_CIR 0x80
138 #define VIA_CRDR_SDSTS_IO 0x100
139 #define VIA_CRDR_SDSTS_CRD 0x200
140 #define VIA_CRDR_SDSTS_CRTO 0x400
141 #define VIA_CRDR_SDSTS_ASCRDIE 0x800
142 #define VIA_CRDR_SDSTS_DT 0x1000
143 #define VIA_CRDR_SDSTS_SC 0x2000
144 #define VIA_CRDR_SDSTS_RC 0x4000
145 #define VIA_CRDR_SDSTS_WC 0x8000
146
147 #define VIA_CRDR_SDSTS_IGN_MASK\
148 (VIA_CRDR_SDSTS_BDD | VIA_CRDR_SDSTS_ASCRDIE | VIA_CRDR_SDSTS_IO)
149 #define VIA_CRDR_SDSTS_INT_MASK \
150 (VIA_CRDR_SDSTS_MBD | VIA_CRDR_SDSTS_BDD | VIA_CRDR_SDSTS_CD \
151 | VIA_CRDR_SDSTS_CIR | VIA_CRDR_SDSTS_IO | VIA_CRDR_SDSTS_CRD \
152 | VIA_CRDR_SDSTS_CRTO | VIA_CRDR_SDSTS_ASCRDIE | VIA_CRDR_SDSTS_DT \
153 | VIA_CRDR_SDSTS_SC | VIA_CRDR_SDSTS_RC | VIA_CRDR_SDSTS_WC)
154 #define VIA_CRDR_SDSTS_W1C_MASK \
155 (VIA_CRDR_SDSTS_CECC | VIA_CRDR_SDSTS_MBD | VIA_CRDR_SDSTS_BDD \
156 | VIA_CRDR_SDSTS_CD | VIA_CRDR_SDSTS_CIR | VIA_CRDR_SDSTS_CRD \
157 | VIA_CRDR_SDSTS_CRTO | VIA_CRDR_SDSTS_ASCRDIE | VIA_CRDR_SDSTS_DT \
158 | VIA_CRDR_SDSTS_SC | VIA_CRDR_SDSTS_RC | VIA_CRDR_SDSTS_WC)
159 #define VIA_CRDR_SDSTS_CMD_MASK \
160 (VIA_CRDR_SDSTS_CRD | VIA_CRDR_SDSTS_CRTO | VIA_CRDR_SDSTS_SC)
161 #define VIA_CRDR_SDSTS_DATA_MASK\
162 (VIA_CRDR_SDSTS_MBD | VIA_CRDR_SDSTS_DT \
163 | VIA_CRDR_SDSTS_RC | VIA_CRDR_SDSTS_WC)
164
165 #define VIA_CRDR_SDSTATUS2 0x2a
166 /*
167 * CFE : Enable SD host automatic Clock FReezing
168 */
169 #define VIA_CRDR_SDSTS_CFE 0x80
170
171 #define VIA_CRDR_SDRSPTMO 0x2C
172
173 #define VIA_CRDR_SDCLKSEL 0x30
174
175 #define VIA_CRDR_SDEXTCTRL 0x34
176 #define VIS_CRDR_SDEXTCTRL_AUTOSTOP_SD 0x01
177 #define VIS_CRDR_SDEXTCTRL_SHIFT_9 0x02
178 #define VIS_CRDR_SDEXTCTRL_MMC_8BIT 0x04
179 #define VIS_CRDR_SDEXTCTRL_RELD_BLK 0x08
180 #define VIS_CRDR_SDEXTCTRL_BAD_CMDA 0x10
181 #define VIS_CRDR_SDEXTCTRL_BAD_DATA 0x20
182 #define VIS_CRDR_SDEXTCTRL_AUTOSTOP_SPI 0x40
183 #define VIA_CRDR_SDEXTCTRL_HISPD 0x80
184 /* 0x38-0xFF reserved */
185
186 /*
187 * Data DMA Control Registers
188 */
189
190 #define VIA_CRDR_DMABASEADD 0x0
191 #define VIA_CRDR_DMACOUNTER 0x4
192
193 #define VIA_CRDR_DMACTRL 0x8
194 /*
195 * DIR :Transaction Direction
196 * 0 : From card to memory
197 * 1 : From memory to card
198 */
199 #define VIA_CRDR_DMACTRL_DIR 0x100
200 #define VIA_CRDR_DMACTRL_ENIRQ 0x10000
201 #define VIA_CRDR_DMACTRL_SFTRST 0x1000000
202
203 #define VIA_CRDR_DMASTS 0xc
204
205 #define VIA_CRDR_DMASTART 0x10
206 /*0x14-0xFF reserved*/
207
208 /*
209 * PCI Control Registers
210 */
211
212 /*0x0 - 0x1 reserved*/
213 #define VIA_CRDR_PCICLKGATT 0x2
214 /*
215 * SFTRST :
216 * 0 : Soft reset all the controller and it will be de-asserted automatically
217 * 1 : Soft reset is de-asserted
218 */
219 #define VIA_CRDR_PCICLKGATT_SFTRST 0x01
220 /*
221 * 3V3 : Pad power select
222 * 0 : 1.8V
223 * 1 : 3.3V
224 * NOTE : No mater what the actual value should be, this bit always
225 * read as 0. This is a hardware bug.
226 */
227 #define VIA_CRDR_PCICLKGATT_3V3 0x10
228 /*
229 * PAD_PWRON : Pad Power on/off select
230 * 0 : Power off
231 * 1 : Power on
232 * NOTE : No mater what the actual value should be, this bit always
233 * read as 0. This is a hardware bug.
234 */
235 #define VIA_CRDR_PCICLKGATT_PAD_PWRON 0x20
236
237 #define VIA_CRDR_PCISDCCLK 0x5
238
239 #define VIA_CRDR_PCIDMACLK 0x7
240 #define VIA_CRDR_PCIDMACLK_SDC 0x2
241
242 #define VIA_CRDR_PCIINTCTRL 0x8
243 #define VIA_CRDR_PCIINTCTRL_SDCIRQEN 0x04
244
245 #define VIA_CRDR_PCIINTSTATUS 0x9
246 #define VIA_CRDR_PCIINTSTATUS_SDC 0x04
247
248 #define VIA_CRDR_PCITMOCTRL 0xa
249 #define VIA_CRDR_PCITMOCTRL_NO 0x0
250 #define VIA_CRDR_PCITMOCTRL_32US 0x1
251 #define VIA_CRDR_PCITMOCTRL_256US 0x2
252 #define VIA_CRDR_PCITMOCTRL_1024US 0x3
253 #define VIA_CRDR_PCITMOCTRL_256MS 0x4
254 #define VIA_CRDR_PCITMOCTRL_512MS 0x5
255 #define VIA_CRDR_PCITMOCTRL_1024MS 0x6
256
257 /*0xB-0xFF reserved*/
258
259 enum PCI_HOST_CLK_CONTROL {
260 PCI_CLK_375K = 0x03,
261 PCI_CLK_8M = 0x04,
262 PCI_CLK_12M = 0x00,
263 PCI_CLK_16M = 0x05,
264 PCI_CLK_24M = 0x01,
265 PCI_CLK_33M = 0x06,
266 PCI_CLK_48M = 0x02
267 };
268
269 struct sdhcreg {
270 u32 sdcontrol_reg;
271 u32 sdcmdarg_reg;
272 u32 sdbusmode_reg;
273 u32 sdblklen_reg;
274 u32 sdresp_reg[4];
275 u32 sdcurblkcnt_reg;
276 u32 sdintmask_reg;
277 u32 sdstatus_reg;
278 u32 sdrsptmo_reg;
279 u32 sdclksel_reg;
280 u32 sdextctrl_reg;
281 };
282
283 struct pcictrlreg {
284 u8 reserve[2];
285 u8 pciclkgat_reg;
286 u8 pcinfcclk_reg;
287 u8 pcimscclk_reg;
288 u8 pcisdclk_reg;
289 u8 pcicaclk_reg;
290 u8 pcidmaclk_reg;
291 u8 pciintctrl_reg;
292 u8 pciintstatus_reg;
293 u8 pcitmoctrl_reg;
294 u8 Resv;
295 };
296
297 struct via_crdr_mmc_host {
298 struct mmc_host *mmc;
299 struct mmc_request *mrq;
300 struct mmc_command *cmd;
301 struct mmc_data *data;
302
303 void __iomem *mmiobase;
304 void __iomem *sdhc_mmiobase;
305 void __iomem *ddma_mmiobase;
306 void __iomem *pcictrl_mmiobase;
307
308 struct pcictrlreg pm_pcictrl_reg;
309 struct sdhcreg pm_sdhc_reg;
310
311 struct work_struct carddet_work;
312 struct tasklet_struct finish_tasklet;
313
314 struct timer_list timer;
315 spinlock_t lock;
316 u8 power;
317 int reject;
318 unsigned int quirks;
319 };
320
321 /* some devices need a very long delay for power to stabilize */
322 #define VIA_CRDR_QUIRK_300MS_PWRDELAY 0x0001
323
324 static struct pci_device_id via_ids[] = {
325 {PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_9530,
326 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0,},
327 {0,}
328 };
329
330 MODULE_DEVICE_TABLE(pci, via_ids);
331
332 static void via_print_sdchc(struct via_crdr_mmc_host *host)
333 {
334 void __iomem *addrbase = host->sdhc_mmiobase;
335
336 pr_debug("SDC MMIO Registers:\n");
337 pr_debug("SDCONTROL=%08x, SDCMDARG=%08x, SDBUSMODE=%08x\n",
338 readl(addrbase + VIA_CRDR_SDCTRL),
339 readl(addrbase + VIA_CRDR_SDCARG),
340 readl(addrbase + VIA_CRDR_SDBUSMODE));
341 pr_debug("SDBLKLEN=%08x, SDCURBLKCNT=%08x, SDINTMASK=%08x\n",
342 readl(addrbase + VIA_CRDR_SDBLKLEN),
343 readl(addrbase + VIA_CRDR_SDCURBLKCNT),
344 readl(addrbase + VIA_CRDR_SDINTMASK));
345 pr_debug("SDSTATUS=%08x, SDCLKSEL=%08x, SDEXTCTRL=%08x\n",
346 readl(addrbase + VIA_CRDR_SDSTATUS),
347 readl(addrbase + VIA_CRDR_SDCLKSEL),
348 readl(addrbase + VIA_CRDR_SDEXTCTRL));
349 }
350
351 static void via_print_pcictrl(struct via_crdr_mmc_host *host)
352 {
353 void __iomem *addrbase = host->pcictrl_mmiobase;
354
355 pr_debug("PCI Control Registers:\n");
356 pr_debug("PCICLKGATT=%02x, PCISDCCLK=%02x, PCIDMACLK=%02x\n",
357 readb(addrbase + VIA_CRDR_PCICLKGATT),
358 readb(addrbase + VIA_CRDR_PCISDCCLK),
359 readb(addrbase + VIA_CRDR_PCIDMACLK));
360 pr_debug("PCIINTCTRL=%02x, PCIINTSTATUS=%02x\n",
361 readb(addrbase + VIA_CRDR_PCIINTCTRL),
362 readb(addrbase + VIA_CRDR_PCIINTSTATUS));
363 }
364
365 static void via_save_pcictrlreg(struct via_crdr_mmc_host *host)
366 {
367 struct pcictrlreg *pm_pcictrl_reg;
368 void __iomem *addrbase;
369
370 pm_pcictrl_reg = &(host->pm_pcictrl_reg);
371 addrbase = host->pcictrl_mmiobase;
372
373 pm_pcictrl_reg->pciclkgat_reg = readb(addrbase + VIA_CRDR_PCICLKGATT);
374 pm_pcictrl_reg->pciclkgat_reg |=
375 VIA_CRDR_PCICLKGATT_3V3 | VIA_CRDR_PCICLKGATT_PAD_PWRON;
376 pm_pcictrl_reg->pcisdclk_reg = readb(addrbase + VIA_CRDR_PCISDCCLK);
377 pm_pcictrl_reg->pcidmaclk_reg = readb(addrbase + VIA_CRDR_PCIDMACLK);
378 pm_pcictrl_reg->pciintctrl_reg = readb(addrbase + VIA_CRDR_PCIINTCTRL);
379 pm_pcictrl_reg->pciintstatus_reg =
380 readb(addrbase + VIA_CRDR_PCIINTSTATUS);
381 pm_pcictrl_reg->pcitmoctrl_reg = readb(addrbase + VIA_CRDR_PCITMOCTRL);
382 }
383
384 static void via_restore_pcictrlreg(struct via_crdr_mmc_host *host)
385 {
386 struct pcictrlreg *pm_pcictrl_reg;
387 void __iomem *addrbase;
388
389 pm_pcictrl_reg = &(host->pm_pcictrl_reg);
390 addrbase = host->pcictrl_mmiobase;
391
392 writeb(pm_pcictrl_reg->pciclkgat_reg, addrbase + VIA_CRDR_PCICLKGATT);
393 writeb(pm_pcictrl_reg->pcisdclk_reg, addrbase + VIA_CRDR_PCISDCCLK);
394 writeb(pm_pcictrl_reg->pcidmaclk_reg, addrbase + VIA_CRDR_PCIDMACLK);
395 writeb(pm_pcictrl_reg->pciintctrl_reg, addrbase + VIA_CRDR_PCIINTCTRL);
396 writeb(pm_pcictrl_reg->pciintstatus_reg,
397 addrbase + VIA_CRDR_PCIINTSTATUS);
398 writeb(pm_pcictrl_reg->pcitmoctrl_reg, addrbase + VIA_CRDR_PCITMOCTRL);
399 }
400
401 static void via_save_sdcreg(struct via_crdr_mmc_host *host)
402 {
403 struct sdhcreg *pm_sdhc_reg;
404 void __iomem *addrbase;
405
406 pm_sdhc_reg = &(host->pm_sdhc_reg);
407 addrbase = host->sdhc_mmiobase;
408
409 pm_sdhc_reg->sdcontrol_reg = readl(addrbase + VIA_CRDR_SDCTRL);
410 pm_sdhc_reg->sdcmdarg_reg = readl(addrbase + VIA_CRDR_SDCARG);
411 pm_sdhc_reg->sdbusmode_reg = readl(addrbase + VIA_CRDR_SDBUSMODE);
412 pm_sdhc_reg->sdblklen_reg = readl(addrbase + VIA_CRDR_SDBLKLEN);
413 pm_sdhc_reg->sdcurblkcnt_reg = readl(addrbase + VIA_CRDR_SDCURBLKCNT);
414 pm_sdhc_reg->sdintmask_reg = readl(addrbase + VIA_CRDR_SDINTMASK);
415 pm_sdhc_reg->sdstatus_reg = readl(addrbase + VIA_CRDR_SDSTATUS);
416 pm_sdhc_reg->sdrsptmo_reg = readl(addrbase + VIA_CRDR_SDRSPTMO);
417 pm_sdhc_reg->sdclksel_reg = readl(addrbase + VIA_CRDR_SDCLKSEL);
418 pm_sdhc_reg->sdextctrl_reg = readl(addrbase + VIA_CRDR_SDEXTCTRL);
419 }
420
421 static void via_restore_sdcreg(struct via_crdr_mmc_host *host)
422 {
423 struct sdhcreg *pm_sdhc_reg;
424 void __iomem *addrbase;
425
426 pm_sdhc_reg = &(host->pm_sdhc_reg);
427 addrbase = host->sdhc_mmiobase;
428
429 writel(pm_sdhc_reg->sdcontrol_reg, addrbase + VIA_CRDR_SDCTRL);
430 writel(pm_sdhc_reg->sdcmdarg_reg, addrbase + VIA_CRDR_SDCARG);
431 writel(pm_sdhc_reg->sdbusmode_reg, addrbase + VIA_CRDR_SDBUSMODE);
432 writel(pm_sdhc_reg->sdblklen_reg, addrbase + VIA_CRDR_SDBLKLEN);
433 writel(pm_sdhc_reg->sdcurblkcnt_reg, addrbase + VIA_CRDR_SDCURBLKCNT);
434 writel(pm_sdhc_reg->sdintmask_reg, addrbase + VIA_CRDR_SDINTMASK);
435 writel(pm_sdhc_reg->sdstatus_reg, addrbase + VIA_CRDR_SDSTATUS);
436 writel(pm_sdhc_reg->sdrsptmo_reg, addrbase + VIA_CRDR_SDRSPTMO);
437 writel(pm_sdhc_reg->sdclksel_reg, addrbase + VIA_CRDR_SDCLKSEL);
438 writel(pm_sdhc_reg->sdextctrl_reg, addrbase + VIA_CRDR_SDEXTCTRL);
439 }
440
441 static void via_pwron_sleep(struct via_crdr_mmc_host *sdhost)
442 {
443 if (sdhost->quirks & VIA_CRDR_QUIRK_300MS_PWRDELAY)
444 msleep(300);
445 else
446 msleep(3);
447 }
448
449 static void via_set_ddma(struct via_crdr_mmc_host *host,
450 dma_addr_t dmaaddr, u32 count, int dir, int enirq)
451 {
452 void __iomem *addrbase;
453 u32 ctrl_data = 0;
454
455 if (enirq)
456 ctrl_data |= VIA_CRDR_DMACTRL_ENIRQ;
457
458 if (dir)
459 ctrl_data |= VIA_CRDR_DMACTRL_DIR;
460
461 addrbase = host->ddma_mmiobase;
462
463 writel(dmaaddr, addrbase + VIA_CRDR_DMABASEADD);
464 writel(count, addrbase + VIA_CRDR_DMACOUNTER);
465 writel(ctrl_data, addrbase + VIA_CRDR_DMACTRL);
466 writel(0x01, addrbase + VIA_CRDR_DMASTART);
467
468 /* It seems that our DMA can not work normally with 375kHz clock */
469 /* FIXME: don't brute-force 8MHz but use PIO at 375kHz !! */
470 addrbase = host->pcictrl_mmiobase;
471 if (readb(addrbase + VIA_CRDR_PCISDCCLK) == PCI_CLK_375K) {
472 dev_info(host->mmc->parent, "forcing card speed to 8MHz\n");
473 writeb(PCI_CLK_8M, addrbase + VIA_CRDR_PCISDCCLK);
474 }
475 }
476
477 static void via_sdc_preparedata(struct via_crdr_mmc_host *host,
478 struct mmc_data *data)
479 {
480 void __iomem *addrbase;
481 u32 blk_reg;
482 int count;
483
484 WARN_ON(host->data);
485
486 /* Sanity checks */
487 BUG_ON(data->blksz > host->mmc->max_blk_size);
488 BUG_ON(data->blocks > host->mmc->max_blk_count);
489
490 host->data = data;
491
492 count = dma_map_sg(mmc_dev(host->mmc), data->sg, data->sg_len,
493 ((data->flags & MMC_DATA_READ) ?
494 PCI_DMA_FROMDEVICE : PCI_DMA_TODEVICE));
495 BUG_ON(count != 1);
496
497 via_set_ddma(host, sg_dma_address(data->sg), sg_dma_len(data->sg),
498 (data->flags & MMC_DATA_WRITE) ? 1 : 0, 1);
499
500 addrbase = host->sdhc_mmiobase;
501
502 blk_reg = data->blksz - 1;
503 blk_reg |= VIA_CRDR_SDBLKLEN_GPIDET | VIA_CRDR_SDBLKLEN_INTEN;
504 blk_reg |= (data->blocks) << 16;
505
506 writel(blk_reg, addrbase + VIA_CRDR_SDBLKLEN);
507 }
508
509 static void via_sdc_get_response(struct via_crdr_mmc_host *host,
510 struct mmc_command *cmd)
511 {
512 void __iomem *addrbase = host->sdhc_mmiobase;
513 u32 dwdata0 = readl(addrbase + VIA_CRDR_SDRESP0);
514 u32 dwdata1 = readl(addrbase + VIA_CRDR_SDRESP1);
515 u32 dwdata2 = readl(addrbase + VIA_CRDR_SDRESP2);
516 u32 dwdata3 = readl(addrbase + VIA_CRDR_SDRESP3);
517
518 if (cmd->flags & MMC_RSP_136) {
519 cmd->resp[0] = ((u8) (dwdata1)) |
520 (((u8) (dwdata0 >> 24)) << 8) |
521 (((u8) (dwdata0 >> 16)) << 16) |
522 (((u8) (dwdata0 >> 8)) << 24);
523
524 cmd->resp[1] = ((u8) (dwdata2)) |
525 (((u8) (dwdata1 >> 24)) << 8) |
526 (((u8) (dwdata1 >> 16)) << 16) |
527 (((u8) (dwdata1 >> 8)) << 24);
528
529 cmd->resp[2] = ((u8) (dwdata3)) |
530 (((u8) (dwdata2 >> 24)) << 8) |
531 (((u8) (dwdata2 >> 16)) << 16) |
532 (((u8) (dwdata2 >> 8)) << 24);
533
534 cmd->resp[3] = 0xff |
535 ((((u8) (dwdata3 >> 24))) << 8) |
536 (((u8) (dwdata3 >> 16)) << 16) |
537 (((u8) (dwdata3 >> 8)) << 24);
538 } else {
539 dwdata0 >>= 8;
540 cmd->resp[0] = ((dwdata0 & 0xff) << 24) |
541 (((dwdata0 >> 8) & 0xff) << 16) |
542 (((dwdata0 >> 16) & 0xff) << 8) | (dwdata1 & 0xff);
543
544 dwdata1 >>= 8;
545 cmd->resp[1] = ((dwdata1 & 0xff) << 24) |
546 (((dwdata1 >> 8) & 0xff) << 16) |
547 (((dwdata1 >> 16) & 0xff) << 8);
548 }
549 }
550
551 static void via_sdc_send_command(struct via_crdr_mmc_host *host,
552 struct mmc_command *cmd)
553 {
554 void __iomem *addrbase;
555 struct mmc_data *data;
556 u32 cmdctrl = 0;
557
558 WARN_ON(host->cmd);
559
560 data = cmd->data;
561 mod_timer(&host->timer, jiffies + HZ);
562 host->cmd = cmd;
563
564 /*Command index*/
565 cmdctrl = cmd->opcode << 8;
566
567 /*Response type*/
568 switch (mmc_resp_type(cmd)) {
569 case MMC_RSP_NONE:
570 cmdctrl |= VIA_CRDR_SDCTRL_RSP_NONE;
571 break;
572 case MMC_RSP_R1:
573 cmdctrl |= VIA_CRDR_SDCTRL_RSP_R1;
574 break;
575 case MMC_RSP_R1B:
576 cmdctrl |= VIA_CRDR_SDCTRL_RSP_R1B;
577 break;
578 case MMC_RSP_R2:
579 cmdctrl |= VIA_CRDR_SDCTRL_RSP_R2;
580 break;
581 case MMC_RSP_R3:
582 cmdctrl |= VIA_CRDR_SDCTRL_RSP_R3;
583 break;
584 default:
585 pr_err("%s: cmd->flag is not valid\n", mmc_hostname(host->mmc));
586 break;
587 }
588
589 if (!(cmd->data))
590 goto nodata;
591
592 via_sdc_preparedata(host, data);
593
594 /*Command control*/
595 if (data->blocks > 1) {
596 if (data->flags & MMC_DATA_WRITE) {
597 cmdctrl |= VIA_CRDR_SDCTRL_WRITE;
598 cmdctrl |= VIA_CRDR_SDCTRL_MULTI_WR;
599 } else {
600 cmdctrl |= VIA_CRDR_SDCTRL_MULTI_RD;
601 }
602 } else {
603 if (data->flags & MMC_DATA_WRITE) {
604 cmdctrl |= VIA_CRDR_SDCTRL_WRITE;
605 cmdctrl |= VIA_CRDR_SDCTRL_SINGLE_WR;
606 } else {
607 cmdctrl |= VIA_CRDR_SDCTRL_SINGLE_RD;
608 }
609 }
610
611 nodata:
612 if (cmd == host->mrq->stop)
613 cmdctrl |= VIA_CRDR_SDCTRL_STOP;
614
615 cmdctrl |= VIA_CRDR_SDCTRL_START;
616
617 addrbase = host->sdhc_mmiobase;
618 writel(cmd->arg, addrbase + VIA_CRDR_SDCARG);
619 writel(cmdctrl, addrbase + VIA_CRDR_SDCTRL);
620 }
621
622 static void via_sdc_finish_data(struct via_crdr_mmc_host *host)
623 {
624 struct mmc_data *data;
625
626 BUG_ON(!host->data);
627
628 data = host->data;
629 host->data = NULL;
630
631 if (data->error)
632 data->bytes_xfered = 0;
633 else
634 data->bytes_xfered = data->blocks * data->blksz;
635
636 dma_unmap_sg(mmc_dev(host->mmc), data->sg, data->sg_len,
637 ((data->flags & MMC_DATA_READ) ?
638 PCI_DMA_FROMDEVICE : PCI_DMA_TODEVICE));
639
640 if (data->stop)
641 via_sdc_send_command(host, data->stop);
642 else
643 tasklet_schedule(&host->finish_tasklet);
644 }
645
646 static void via_sdc_finish_command(struct via_crdr_mmc_host *host)
647 {
648 via_sdc_get_response(host, host->cmd);
649
650 host->cmd->error = 0;
651
652 if (!host->cmd->data)
653 tasklet_schedule(&host->finish_tasklet);
654
655 host->cmd = NULL;
656 }
657
658 static void via_sdc_request(struct mmc_host *mmc, struct mmc_request *mrq)
659 {
660 void __iomem *addrbase;
661 struct via_crdr_mmc_host *host;
662 unsigned long flags;
663 u16 status;
664
665 host = mmc_priv(mmc);
666
667 spin_lock_irqsave(&host->lock, flags);
668
669 addrbase = host->pcictrl_mmiobase;
670 writeb(VIA_CRDR_PCIDMACLK_SDC, addrbase + VIA_CRDR_PCIDMACLK);
671
672 status = readw(host->sdhc_mmiobase + VIA_CRDR_SDSTATUS);
673 status &= VIA_CRDR_SDSTS_W1C_MASK;
674 writew(status, host->sdhc_mmiobase + VIA_CRDR_SDSTATUS);
675
676 WARN_ON(host->mrq != NULL);
677 host->mrq = mrq;
678
679 status = readw(host->sdhc_mmiobase + VIA_CRDR_SDSTATUS);
680 if (!(status & VIA_CRDR_SDSTS_SLOTG) || host->reject) {
681 host->mrq->cmd->error = -ENOMEDIUM;
682 tasklet_schedule(&host->finish_tasklet);
683 } else {
684 via_sdc_send_command(host, mrq->cmd);
685 }
686
687 mmiowb();
688 spin_unlock_irqrestore(&host->lock, flags);
689 }
690
691 static void via_sdc_set_power(struct via_crdr_mmc_host *host,
692 unsigned short power, unsigned int on)
693 {
694 unsigned long flags;
695 u8 gatt;
696
697 spin_lock_irqsave(&host->lock, flags);
698
699 host->power = (1 << power);
700
701 gatt = readb(host->pcictrl_mmiobase + VIA_CRDR_PCICLKGATT);
702 if (host->power == MMC_VDD_165_195)
703 gatt &= ~VIA_CRDR_PCICLKGATT_3V3;
704 else
705 gatt |= VIA_CRDR_PCICLKGATT_3V3;
706 if (on)
707 gatt |= VIA_CRDR_PCICLKGATT_PAD_PWRON;
708 else
709 gatt &= ~VIA_CRDR_PCICLKGATT_PAD_PWRON;
710 writeb(gatt, host->pcictrl_mmiobase + VIA_CRDR_PCICLKGATT);
711
712 mmiowb();
713 spin_unlock_irqrestore(&host->lock, flags);
714
715 via_pwron_sleep(host);
716 }
717
718 static void via_sdc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
719 {
720 struct via_crdr_mmc_host *host;
721 unsigned long flags;
722 void __iomem *addrbase;
723 u32 org_data, sdextctrl;
724 u8 clock;
725
726 host = mmc_priv(mmc);
727
728 spin_lock_irqsave(&host->lock, flags);
729
730 addrbase = host->sdhc_mmiobase;
731 org_data = readl(addrbase + VIA_CRDR_SDBUSMODE);
732 sdextctrl = readl(addrbase + VIA_CRDR_SDEXTCTRL);
733
734 if (ios->bus_width == MMC_BUS_WIDTH_1)
735 org_data &= ~VIA_CRDR_SDMODE_4BIT;
736 else
737 org_data |= VIA_CRDR_SDMODE_4BIT;
738
739 if (ios->power_mode == MMC_POWER_OFF)
740 org_data &= ~VIA_CRDR_SDMODE_CLK_ON;
741 else
742 org_data |= VIA_CRDR_SDMODE_CLK_ON;
743
744 if (ios->timing == MMC_TIMING_SD_HS)
745 sdextctrl |= VIA_CRDR_SDEXTCTRL_HISPD;
746 else
747 sdextctrl &= ~VIA_CRDR_SDEXTCTRL_HISPD;
748
749 writel(org_data, addrbase + VIA_CRDR_SDBUSMODE);
750 writel(sdextctrl, addrbase + VIA_CRDR_SDEXTCTRL);
751
752 if (ios->clock >= 48000000)
753 clock = PCI_CLK_48M;
754 else if (ios->clock >= 33000000)
755 clock = PCI_CLK_33M;
756 else if (ios->clock >= 24000000)
757 clock = PCI_CLK_24M;
758 else if (ios->clock >= 16000000)
759 clock = PCI_CLK_16M;
760 else if (ios->clock >= 12000000)
761 clock = PCI_CLK_12M;
762 else if (ios->clock >= 8000000)
763 clock = PCI_CLK_8M;
764 else
765 clock = PCI_CLK_375K;
766
767 addrbase = host->pcictrl_mmiobase;
768 if (readb(addrbase + VIA_CRDR_PCISDCCLK) != clock)
769 writeb(clock, addrbase + VIA_CRDR_PCISDCCLK);
770
771 mmiowb();
772 spin_unlock_irqrestore(&host->lock, flags);
773
774 if (ios->power_mode != MMC_POWER_OFF)
775 via_sdc_set_power(host, ios->vdd, 1);
776 else
777 via_sdc_set_power(host, ios->vdd, 0);
778 }
779
780 static int via_sdc_get_ro(struct mmc_host *mmc)
781 {
782 struct via_crdr_mmc_host *host;
783 unsigned long flags;
784 u16 status;
785
786 host = mmc_priv(mmc);
787
788 spin_lock_irqsave(&host->lock, flags);
789
790 status = readw(host->sdhc_mmiobase + VIA_CRDR_SDSTATUS);
791
792 spin_unlock_irqrestore(&host->lock, flags);
793
794 return !(status & VIA_CRDR_SDSTS_WP);
795 }
796
797 static const struct mmc_host_ops via_sdc_ops = {
798 .request = via_sdc_request,
799 .set_ios = via_sdc_set_ios,
800 .get_ro = via_sdc_get_ro,
801 };
802
803 static void via_reset_pcictrl(struct via_crdr_mmc_host *host)
804 {
805 void __iomem *addrbase;
806 unsigned long flags;
807 u8 gatt;
808
809 addrbase = host->pcictrl_mmiobase;
810
811 spin_lock_irqsave(&host->lock, flags);
812
813 via_save_pcictrlreg(host);
814 via_save_sdcreg(host);
815
816 spin_unlock_irqrestore(&host->lock, flags);
817
818 gatt = VIA_CRDR_PCICLKGATT_PAD_PWRON;
819 if (host->power == MMC_VDD_165_195)
820 gatt &= VIA_CRDR_PCICLKGATT_3V3;
821 else
822 gatt |= VIA_CRDR_PCICLKGATT_3V3;
823 writeb(gatt, host->pcictrl_mmiobase + VIA_CRDR_PCICLKGATT);
824 via_pwron_sleep(host);
825 gatt |= VIA_CRDR_PCICLKGATT_SFTRST;
826 writeb(gatt, host->pcictrl_mmiobase + VIA_CRDR_PCICLKGATT);
827 msleep(3);
828
829 spin_lock_irqsave(&host->lock, flags);
830
831 via_restore_pcictrlreg(host);
832 via_restore_sdcreg(host);
833
834 mmiowb();
835 spin_unlock_irqrestore(&host->lock, flags);
836 }
837
838 static void via_sdc_cmd_isr(struct via_crdr_mmc_host *host, u16 intmask)
839 {
840 BUG_ON(intmask == 0);
841
842 if (!host->cmd) {
843 pr_err("%s: Got command interrupt 0x%x even "
844 "though no command operation was in progress.\n",
845 mmc_hostname(host->mmc), intmask);
846 return;
847 }
848
849 if (intmask & VIA_CRDR_SDSTS_CRTO)
850 host->cmd->error = -ETIMEDOUT;
851 else if (intmask & VIA_CRDR_SDSTS_SC)
852 host->cmd->error = -EILSEQ;
853
854 if (host->cmd->error)
855 tasklet_schedule(&host->finish_tasklet);
856 else if (intmask & VIA_CRDR_SDSTS_CRD)
857 via_sdc_finish_command(host);
858 }
859
860 static void via_sdc_data_isr(struct via_crdr_mmc_host *host, u16 intmask)
861 {
862 BUG_ON(intmask == 0);
863
864 if (intmask & VIA_CRDR_SDSTS_DT)
865 host->data->error = -ETIMEDOUT;
866 else if (intmask & (VIA_CRDR_SDSTS_RC | VIA_CRDR_SDSTS_WC))
867 host->data->error = -EILSEQ;
868
869 via_sdc_finish_data(host);
870 }
871
872 static irqreturn_t via_sdc_isr(int irq, void *dev_id)
873 {
874 struct via_crdr_mmc_host *sdhost = dev_id;
875 void __iomem *addrbase;
876 u8 pci_status;
877 u16 sd_status;
878 irqreturn_t result;
879
880 if (!sdhost)
881 return IRQ_NONE;
882
883 spin_lock(&sdhost->lock);
884
885 addrbase = sdhost->pcictrl_mmiobase;
886 pci_status = readb(addrbase + VIA_CRDR_PCIINTSTATUS);
887 if (!(pci_status & VIA_CRDR_PCIINTSTATUS_SDC)) {
888 result = IRQ_NONE;
889 goto out;
890 }
891
892 addrbase = sdhost->sdhc_mmiobase;
893 sd_status = readw(addrbase + VIA_CRDR_SDSTATUS);
894 sd_status &= VIA_CRDR_SDSTS_INT_MASK;
895 sd_status &= ~VIA_CRDR_SDSTS_IGN_MASK;
896 if (!sd_status) {
897 result = IRQ_NONE;
898 goto out;
899 }
900
901 if (sd_status & VIA_CRDR_SDSTS_CIR) {
902 writew(sd_status & VIA_CRDR_SDSTS_CIR,
903 addrbase + VIA_CRDR_SDSTATUS);
904
905 schedule_work(&sdhost->carddet_work);
906 }
907
908 sd_status &= ~VIA_CRDR_SDSTS_CIR;
909 if (sd_status & VIA_CRDR_SDSTS_CMD_MASK) {
910 writew(sd_status & VIA_CRDR_SDSTS_CMD_MASK,
911 addrbase + VIA_CRDR_SDSTATUS);
912 via_sdc_cmd_isr(sdhost, sd_status & VIA_CRDR_SDSTS_CMD_MASK);
913 }
914 if (sd_status & VIA_CRDR_SDSTS_DATA_MASK) {
915 writew(sd_status & VIA_CRDR_SDSTS_DATA_MASK,
916 addrbase + VIA_CRDR_SDSTATUS);
917 via_sdc_data_isr(sdhost, sd_status & VIA_CRDR_SDSTS_DATA_MASK);
918 }
919
920 sd_status &= ~(VIA_CRDR_SDSTS_CMD_MASK | VIA_CRDR_SDSTS_DATA_MASK);
921 if (sd_status) {
922 pr_err("%s: Unexpected interrupt 0x%x\n",
923 mmc_hostname(sdhost->mmc), sd_status);
924 writew(sd_status, addrbase + VIA_CRDR_SDSTATUS);
925 }
926
927 result = IRQ_HANDLED;
928
929 mmiowb();
930 out:
931 spin_unlock(&sdhost->lock);
932
933 return result;
934 }
935
936 static void via_sdc_timeout(unsigned long ulongdata)
937 {
938 struct via_crdr_mmc_host *sdhost;
939 unsigned long flags;
940
941 sdhost = (struct via_crdr_mmc_host *)ulongdata;
942
943 spin_lock_irqsave(&sdhost->lock, flags);
944
945 if (sdhost->mrq) {
946 pr_err("%s: Timeout waiting for hardware interrupt."
947 "cmd:0x%x\n", mmc_hostname(sdhost->mmc),
948 sdhost->mrq->cmd->opcode);
949
950 if (sdhost->data) {
951 writel(VIA_CRDR_DMACTRL_SFTRST,
952 sdhost->ddma_mmiobase + VIA_CRDR_DMACTRL);
953 sdhost->data->error = -ETIMEDOUT;
954 via_sdc_finish_data(sdhost);
955 } else {
956 if (sdhost->cmd)
957 sdhost->cmd->error = -ETIMEDOUT;
958 else
959 sdhost->mrq->cmd->error = -ETIMEDOUT;
960 tasklet_schedule(&sdhost->finish_tasklet);
961 }
962 }
963
964 mmiowb();
965 spin_unlock_irqrestore(&sdhost->lock, flags);
966 }
967
968 static void via_sdc_tasklet_finish(unsigned long param)
969 {
970 struct via_crdr_mmc_host *host;
971 unsigned long flags;
972 struct mmc_request *mrq;
973
974 host = (struct via_crdr_mmc_host *)param;
975
976 spin_lock_irqsave(&host->lock, flags);
977
978 del_timer(&host->timer);
979 mrq = host->mrq;
980 host->mrq = NULL;
981 host->cmd = NULL;
982 host->data = NULL;
983
984 spin_unlock_irqrestore(&host->lock, flags);
985
986 mmc_request_done(host->mmc, mrq);
987 }
988
989 static void via_sdc_card_detect(struct work_struct *work)
990 {
991 struct via_crdr_mmc_host *host;
992 void __iomem *addrbase;
993 unsigned long flags;
994 u16 status;
995
996 host = container_of(work, struct via_crdr_mmc_host, carddet_work);
997
998 addrbase = host->ddma_mmiobase;
999 writel(VIA_CRDR_DMACTRL_SFTRST, addrbase + VIA_CRDR_DMACTRL);
1000
1001 spin_lock_irqsave(&host->lock, flags);
1002
1003 addrbase = host->pcictrl_mmiobase;
1004 writeb(VIA_CRDR_PCIDMACLK_SDC, addrbase + VIA_CRDR_PCIDMACLK);
1005
1006 addrbase = host->sdhc_mmiobase;
1007 status = readw(addrbase + VIA_CRDR_SDSTATUS);
1008 if (!(status & VIA_CRDR_SDSTS_SLOTG)) {
1009 if (host->mrq) {
1010 pr_err("%s: Card removed during transfer!\n",
1011 mmc_hostname(host->mmc));
1012 host->mrq->cmd->error = -ENOMEDIUM;
1013 tasklet_schedule(&host->finish_tasklet);
1014 }
1015
1016 mmiowb();
1017 spin_unlock_irqrestore(&host->lock, flags);
1018
1019 via_reset_pcictrl(host);
1020
1021 spin_lock_irqsave(&host->lock, flags);
1022 }
1023
1024 mmiowb();
1025 spin_unlock_irqrestore(&host->lock, flags);
1026
1027 via_print_pcictrl(host);
1028 via_print_sdchc(host);
1029
1030 mmc_detect_change(host->mmc, msecs_to_jiffies(500));
1031 }
1032
1033 static void via_init_mmc_host(struct via_crdr_mmc_host *host)
1034 {
1035 struct mmc_host *mmc = host->mmc;
1036 void __iomem *addrbase;
1037 u32 lenreg;
1038 u32 status;
1039
1040 init_timer(&host->timer);
1041 host->timer.data = (unsigned long)host;
1042 host->timer.function = via_sdc_timeout;
1043
1044 spin_lock_init(&host->lock);
1045
1046 mmc->f_min = VIA_CRDR_MIN_CLOCK;
1047 mmc->f_max = VIA_CRDR_MAX_CLOCK;
1048 mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34 | MMC_VDD_165_195;
1049 mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_SD_HIGHSPEED;
1050 mmc->ops = &via_sdc_ops;
1051
1052 /*Hardware cannot do scatter lists*/
1053 mmc->max_hw_segs = 1;
1054 mmc->max_phys_segs = 1;
1055
1056 mmc->max_blk_size = VIA_CRDR_MAX_BLOCK_LENGTH;
1057 mmc->max_blk_count = VIA_CRDR_MAX_BLOCK_COUNT;
1058
1059 mmc->max_seg_size = mmc->max_blk_size * mmc->max_blk_count;
1060 mmc->max_req_size = mmc->max_seg_size;
1061
1062 INIT_WORK(&host->carddet_work, via_sdc_card_detect);
1063
1064 tasklet_init(&host->finish_tasklet, via_sdc_tasklet_finish,
1065 (unsigned long)host);
1066
1067 addrbase = host->sdhc_mmiobase;
1068 writel(0x0, addrbase + VIA_CRDR_SDINTMASK);
1069 msleep(1);
1070
1071 lenreg = VIA_CRDR_SDBLKLEN_GPIDET | VIA_CRDR_SDBLKLEN_INTEN;
1072 writel(lenreg, addrbase + VIA_CRDR_SDBLKLEN);
1073
1074 status = readw(addrbase + VIA_CRDR_SDSTATUS);
1075 status &= VIA_CRDR_SDSTS_W1C_MASK;
1076 writew(status, addrbase + VIA_CRDR_SDSTATUS);
1077
1078 status = readw(addrbase + VIA_CRDR_SDSTATUS2);
1079 status |= VIA_CRDR_SDSTS_CFE;
1080 writew(status, addrbase + VIA_CRDR_SDSTATUS2);
1081
1082 writeb(0x0, addrbase + VIA_CRDR_SDEXTCTRL);
1083
1084 writel(VIA_CRDR_SDACTIVE_INTMASK, addrbase + VIA_CRDR_SDINTMASK);
1085 msleep(1);
1086 }
1087
1088 static int __devinit via_sd_probe(struct pci_dev *pcidev,
1089 const struct pci_device_id *id)
1090 {
1091 struct mmc_host *mmc;
1092 struct via_crdr_mmc_host *sdhost;
1093 u32 base, len;
1094 u8 rev, gatt;
1095 int ret;
1096
1097 pci_read_config_byte(pcidev, PCI_CLASS_REVISION, &rev);
1098 pr_info(DRV_NAME
1099 ": VIA SDMMC controller found at %s [%04x:%04x] (rev %x)\n",
1100 pci_name(pcidev), (int)pcidev->vendor, (int)pcidev->device,
1101 (int)rev);
1102
1103 ret = pci_enable_device(pcidev);
1104 if (ret)
1105 return ret;
1106
1107 ret = pci_request_regions(pcidev, DRV_NAME);
1108 if (ret)
1109 goto disable;
1110
1111 pci_write_config_byte(pcidev, VIA_CRDR_PCI_WORK_MODE, 0);
1112 pci_write_config_byte(pcidev, VIA_CRDR_PCI_DBG_MODE, 0);
1113
1114 mmc = mmc_alloc_host(sizeof(struct via_crdr_mmc_host), &pcidev->dev);
1115 if (!mmc) {
1116 ret = -ENOMEM;
1117 goto release;
1118 }
1119
1120 sdhost = mmc_priv(mmc);
1121 sdhost->mmc = mmc;
1122 dev_set_drvdata(&pcidev->dev, sdhost);
1123
1124 len = pci_resource_len(pcidev, 0);
1125 base = pci_resource_start(pcidev, 0);
1126 sdhost->mmiobase = ioremap_nocache(base, len);
1127 if (!sdhost->mmiobase) {
1128 ret = -ENOMEM;
1129 goto free_mmc_host;
1130 }
1131
1132 sdhost->sdhc_mmiobase =
1133 sdhost->mmiobase + VIA_CRDR_SDC_OFF;
1134 sdhost->ddma_mmiobase =
1135 sdhost->mmiobase + VIA_CRDR_DDMA_OFF;
1136 sdhost->pcictrl_mmiobase =
1137 sdhost->mmiobase + VIA_CRDR_PCICTRL_OFF;
1138
1139 sdhost->power = MMC_VDD_165_195;
1140
1141 gatt = VIA_CRDR_PCICLKGATT_3V3 | VIA_CRDR_PCICLKGATT_PAD_PWRON;
1142 writeb(gatt, sdhost->pcictrl_mmiobase + VIA_CRDR_PCICLKGATT);
1143 via_pwron_sleep(sdhost);
1144 gatt |= VIA_CRDR_PCICLKGATT_SFTRST;
1145 writeb(gatt, sdhost->pcictrl_mmiobase + VIA_CRDR_PCICLKGATT);
1146 msleep(3);
1147
1148 via_init_mmc_host(sdhost);
1149
1150 ret =
1151 request_irq(pcidev->irq, via_sdc_isr, IRQF_SHARED, DRV_NAME,
1152 sdhost);
1153 if (ret)
1154 goto unmap;
1155
1156 writeb(VIA_CRDR_PCIINTCTRL_SDCIRQEN,
1157 sdhost->pcictrl_mmiobase + VIA_CRDR_PCIINTCTRL);
1158 writeb(VIA_CRDR_PCITMOCTRL_1024MS,
1159 sdhost->pcictrl_mmiobase + VIA_CRDR_PCITMOCTRL);
1160
1161 /* device-specific quirks */
1162 if (pcidev->subsystem_vendor == PCI_VENDOR_ID_LENOVO &&
1163 pcidev->subsystem_device == 0x3891)
1164 sdhost->quirks = VIA_CRDR_QUIRK_300MS_PWRDELAY;
1165
1166 mmc_add_host(mmc);
1167
1168 return 0;
1169
1170 unmap:
1171 iounmap(sdhost->mmiobase);
1172 free_mmc_host:
1173 dev_set_drvdata(&pcidev->dev, NULL);
1174 mmc_free_host(mmc);
1175 release:
1176 pci_release_regions(pcidev);
1177 disable:
1178 pci_disable_device(pcidev);
1179
1180 return ret;
1181 }
1182
1183 static void __devexit via_sd_remove(struct pci_dev *pcidev)
1184 {
1185 struct via_crdr_mmc_host *sdhost = pci_get_drvdata(pcidev);
1186 unsigned long flags;
1187 u8 gatt;
1188
1189 spin_lock_irqsave(&sdhost->lock, flags);
1190
1191 /* Ensure we don't accept more commands from mmc layer */
1192 sdhost->reject = 1;
1193
1194 /* Disable generating further interrupts */
1195 writeb(0x0, sdhost->pcictrl_mmiobase + VIA_CRDR_PCIINTCTRL);
1196 mmiowb();
1197
1198 if (sdhost->mrq) {
1199 printk(KERN_ERR "%s: Controller removed during "
1200 "transfer\n", mmc_hostname(sdhost->mmc));
1201
1202 /* make sure all DMA is stopped */
1203 writel(VIA_CRDR_DMACTRL_SFTRST,
1204 sdhost->ddma_mmiobase + VIA_CRDR_DMACTRL);
1205 mmiowb();
1206 sdhost->mrq->cmd->error = -ENOMEDIUM;
1207 if (sdhost->mrq->stop)
1208 sdhost->mrq->stop->error = -ENOMEDIUM;
1209 tasklet_schedule(&sdhost->finish_tasklet);
1210 }
1211 spin_unlock_irqrestore(&sdhost->lock, flags);
1212
1213 mmc_remove_host(sdhost->mmc);
1214
1215 free_irq(pcidev->irq, sdhost);
1216
1217 del_timer_sync(&sdhost->timer);
1218
1219 tasklet_kill(&sdhost->finish_tasklet);
1220
1221 /* switch off power */
1222 gatt = readb(sdhost->pcictrl_mmiobase + VIA_CRDR_PCICLKGATT);
1223 gatt &= ~VIA_CRDR_PCICLKGATT_PAD_PWRON;
1224 writeb(gatt, sdhost->pcictrl_mmiobase + VIA_CRDR_PCICLKGATT);
1225
1226 iounmap(sdhost->mmiobase);
1227 dev_set_drvdata(&pcidev->dev, NULL);
1228 mmc_free_host(sdhost->mmc);
1229 pci_release_regions(pcidev);
1230 pci_disable_device(pcidev);
1231
1232 pr_info(DRV_NAME
1233 ": VIA SDMMC controller at %s [%04x:%04x] has been removed\n",
1234 pci_name(pcidev), (int)pcidev->vendor, (int)pcidev->device);
1235 }
1236
1237 #ifdef CONFIG_PM
1238
1239 static void via_init_sdc_pm(struct via_crdr_mmc_host *host)
1240 {
1241 struct sdhcreg *pm_sdhcreg;
1242 void __iomem *addrbase;
1243 u32 lenreg;
1244 u16 status;
1245
1246 pm_sdhcreg = &(host->pm_sdhc_reg);
1247 addrbase = host->sdhc_mmiobase;
1248
1249 writel(0x0, addrbase + VIA_CRDR_SDINTMASK);
1250
1251 lenreg = VIA_CRDR_SDBLKLEN_GPIDET | VIA_CRDR_SDBLKLEN_INTEN;
1252 writel(lenreg, addrbase + VIA_CRDR_SDBLKLEN);
1253
1254 status = readw(addrbase + VIA_CRDR_SDSTATUS);
1255 status &= VIA_CRDR_SDSTS_W1C_MASK;
1256 writew(status, addrbase + VIA_CRDR_SDSTATUS);
1257
1258 status = readw(addrbase + VIA_CRDR_SDSTATUS2);
1259 status |= VIA_CRDR_SDSTS_CFE;
1260 writew(status, addrbase + VIA_CRDR_SDSTATUS2);
1261
1262 writel(pm_sdhcreg->sdcontrol_reg, addrbase + VIA_CRDR_SDCTRL);
1263 writel(pm_sdhcreg->sdcmdarg_reg, addrbase + VIA_CRDR_SDCARG);
1264 writel(pm_sdhcreg->sdintmask_reg, addrbase + VIA_CRDR_SDINTMASK);
1265 writel(pm_sdhcreg->sdrsptmo_reg, addrbase + VIA_CRDR_SDRSPTMO);
1266 writel(pm_sdhcreg->sdclksel_reg, addrbase + VIA_CRDR_SDCLKSEL);
1267 writel(pm_sdhcreg->sdextctrl_reg, addrbase + VIA_CRDR_SDEXTCTRL);
1268
1269 via_print_pcictrl(host);
1270 via_print_sdchc(host);
1271 }
1272
1273 static int via_sd_suspend(struct pci_dev *pcidev, pm_message_t state)
1274 {
1275 struct via_crdr_mmc_host *host;
1276 int ret = 0;
1277
1278 host = pci_get_drvdata(pcidev);
1279
1280 via_save_pcictrlreg(host);
1281 via_save_sdcreg(host);
1282
1283 ret = mmc_suspend_host(host->mmc, state);
1284
1285 pci_save_state(pcidev);
1286 pci_enable_wake(pcidev, pci_choose_state(pcidev, state), 0);
1287 pci_disable_device(pcidev);
1288 pci_set_power_state(pcidev, pci_choose_state(pcidev, state));
1289
1290 return ret;
1291 }
1292
1293 static int via_sd_resume(struct pci_dev *pcidev)
1294 {
1295 struct via_crdr_mmc_host *sdhost;
1296 int ret = 0;
1297 u8 gatt;
1298
1299 sdhost = pci_get_drvdata(pcidev);
1300
1301 gatt = VIA_CRDR_PCICLKGATT_PAD_PWRON;
1302 if (sdhost->power == MMC_VDD_165_195)
1303 gatt &= ~VIA_CRDR_PCICLKGATT_3V3;
1304 else
1305 gatt |= VIA_CRDR_PCICLKGATT_3V3;
1306 writeb(gatt, sdhost->pcictrl_mmiobase + VIA_CRDR_PCICLKGATT);
1307 via_pwron_sleep(sdhost);
1308 gatt |= VIA_CRDR_PCICLKGATT_SFTRST;
1309 writeb(gatt, sdhost->pcictrl_mmiobase + VIA_CRDR_PCICLKGATT);
1310 msleep(3);
1311
1312 msleep(100);
1313
1314 pci_set_power_state(pcidev, PCI_D0);
1315 pci_restore_state(pcidev);
1316 ret = pci_enable_device(pcidev);
1317 if (ret)
1318 return ret;
1319
1320 via_restore_pcictrlreg(sdhost);
1321 via_init_sdc_pm(sdhost);
1322
1323 ret = mmc_resume_host(sdhost->mmc);
1324
1325 return ret;
1326 }
1327
1328 #else /* CONFIG_PM */
1329
1330 #define via_sd_suspend NULL
1331 #define via_sd_resume NULL
1332
1333 #endif /* CONFIG_PM */
1334
1335 static struct pci_driver via_sd_driver = {
1336 .name = DRV_NAME,
1337 .id_table = via_ids,
1338 .probe = via_sd_probe,
1339 .remove = __devexit_p(via_sd_remove),
1340 .suspend = via_sd_suspend,
1341 .resume = via_sd_resume,
1342 };
1343
1344 static int __init via_sd_drv_init(void)
1345 {
1346 pr_info(DRV_NAME ": VIA SD/MMC Card Reader driver "
1347 "(C) 2008 VIA Technologies, Inc.\n");
1348
1349 return pci_register_driver(&via_sd_driver);
1350 }
1351
1352 static void __exit via_sd_drv_exit(void)
1353 {
1354 pci_unregister_driver(&via_sd_driver);
1355 }
1356
1357 module_init(via_sd_drv_init);
1358 module_exit(via_sd_drv_exit);
1359
1360 MODULE_LICENSE("GPL");
1361 MODULE_AUTHOR("VIA Technologies Inc.");
1362 MODULE_DESCRIPTION("VIA SD/MMC Card Interface driver");
1363
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