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Merge tag 'iwlwifi-next-for-kalle-2016-07-01' of git://git.kernel.org/pub/scm/linux...
[deliverable/linux.git] / drivers / mmc / host / sdhci-pxav3.c
1 /*
2 * Copyright (C) 2010 Marvell International Ltd.
3 * Zhangfei Gao <zhangfei.gao@marvell.com>
4 * Kevin Wang <dwang4@marvell.com>
5 * Mingwei Wang <mwwang@marvell.com>
6 * Philip Rakity <prakity@marvell.com>
7 * Mark Brown <markb@marvell.com>
8 *
9 * This software is licensed under the terms of the GNU General Public
10 * License version 2, as published by the Free Software Foundation, and
11 * may be copied, distributed, and modified under those terms.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 */
19 #include <linux/err.h>
20 #include <linux/init.h>
21 #include <linux/platform_device.h>
22 #include <linux/clk.h>
23 #include <linux/io.h>
24 #include <linux/gpio.h>
25 #include <linux/mmc/card.h>
26 #include <linux/mmc/host.h>
27 #include <linux/mmc/slot-gpio.h>
28 #include <linux/platform_data/pxa_sdhci.h>
29 #include <linux/slab.h>
30 #include <linux/delay.h>
31 #include <linux/module.h>
32 #include <linux/of.h>
33 #include <linux/of_device.h>
34 #include <linux/of_gpio.h>
35 #include <linux/pm.h>
36 #include <linux/pm_runtime.h>
37 #include <linux/mbus.h>
38
39 #include "sdhci.h"
40 #include "sdhci-pltfm.h"
41
42 #define PXAV3_RPM_DELAY_MS 50
43
44 #define SD_CLOCK_BURST_SIZE_SETUP 0x10A
45 #define SDCLK_SEL 0x100
46 #define SDCLK_DELAY_SHIFT 9
47 #define SDCLK_DELAY_MASK 0x1f
48
49 #define SD_CFG_FIFO_PARAM 0x100
50 #define SDCFG_GEN_PAD_CLK_ON (1<<6)
51 #define SDCFG_GEN_PAD_CLK_CNT_MASK 0xFF
52 #define SDCFG_GEN_PAD_CLK_CNT_SHIFT 24
53
54 #define SD_SPI_MODE 0x108
55 #define SD_CE_ATA_1 0x10C
56
57 #define SD_CE_ATA_2 0x10E
58 #define SDCE_MISC_INT (1<<2)
59 #define SDCE_MISC_INT_EN (1<<1)
60
61 struct sdhci_pxa {
62 struct clk *clk_core;
63 struct clk *clk_io;
64 u8 power_mode;
65 void __iomem *sdio3_conf_reg;
66 };
67
68 /*
69 * These registers are relative to the second register region, for the
70 * MBus bridge.
71 */
72 #define SDHCI_WINDOW_CTRL(i) (0x80 + ((i) << 3))
73 #define SDHCI_WINDOW_BASE(i) (0x84 + ((i) << 3))
74 #define SDHCI_MAX_WIN_NUM 8
75
76 /*
77 * Fields below belong to SDIO3 Configuration Register (third register
78 * region for the Armada 38x flavor)
79 */
80
81 #define SDIO3_CONF_CLK_INV BIT(0)
82 #define SDIO3_CONF_SD_FB_CLK BIT(2)
83
84 static int mv_conf_mbus_windows(struct platform_device *pdev,
85 const struct mbus_dram_target_info *dram)
86 {
87 int i;
88 void __iomem *regs;
89 struct resource *res;
90
91 if (!dram) {
92 dev_err(&pdev->dev, "no mbus dram info\n");
93 return -EINVAL;
94 }
95
96 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
97 if (!res) {
98 dev_err(&pdev->dev, "cannot get mbus registers\n");
99 return -EINVAL;
100 }
101
102 regs = ioremap(res->start, resource_size(res));
103 if (!regs) {
104 dev_err(&pdev->dev, "cannot map mbus registers\n");
105 return -ENOMEM;
106 }
107
108 for (i = 0; i < SDHCI_MAX_WIN_NUM; i++) {
109 writel(0, regs + SDHCI_WINDOW_CTRL(i));
110 writel(0, regs + SDHCI_WINDOW_BASE(i));
111 }
112
113 for (i = 0; i < dram->num_cs; i++) {
114 const struct mbus_dram_window *cs = dram->cs + i;
115
116 /* Write size, attributes and target id to control register */
117 writel(((cs->size - 1) & 0xffff0000) |
118 (cs->mbus_attr << 8) |
119 (dram->mbus_dram_target_id << 4) | 1,
120 regs + SDHCI_WINDOW_CTRL(i));
121 /* Write base address to base register */
122 writel(cs->base, regs + SDHCI_WINDOW_BASE(i));
123 }
124
125 iounmap(regs);
126
127 return 0;
128 }
129
130 static int armada_38x_quirks(struct platform_device *pdev,
131 struct sdhci_host *host)
132 {
133 struct device_node *np = pdev->dev.of_node;
134 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
135 struct sdhci_pxa *pxa = sdhci_pltfm_priv(pltfm_host);
136 struct resource *res;
137
138 host->quirks &= ~SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN;
139 host->quirks |= SDHCI_QUIRK_MISSING_CAPS;
140
141 host->caps = sdhci_readl(host, SDHCI_CAPABILITIES);
142 host->caps1 = sdhci_readl(host, SDHCI_CAPABILITIES_1);
143
144 res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
145 "conf-sdio3");
146 if (res) {
147 pxa->sdio3_conf_reg = devm_ioremap_resource(&pdev->dev, res);
148 if (IS_ERR(pxa->sdio3_conf_reg))
149 return PTR_ERR(pxa->sdio3_conf_reg);
150 } else {
151 /*
152 * According to erratum 'FE-2946959' both SDR50 and DDR50
153 * modes require specific clock adjustments in SDIO3
154 * Configuration register, if the adjustment is not done,
155 * remove them from the capabilities.
156 */
157 host->caps1 &= ~(SDHCI_SUPPORT_SDR50 | SDHCI_SUPPORT_DDR50);
158
159 dev_warn(&pdev->dev, "conf-sdio3 register not found: disabling SDR50 and DDR50 modes.\nConsider updating your dtb\n");
160 }
161
162 /*
163 * According to erratum 'ERR-7878951' Armada 38x SDHCI
164 * controller has different capabilities than the ones shown
165 * in its registers
166 */
167 if (of_property_read_bool(np, "no-1-8-v")) {
168 host->caps &= ~SDHCI_CAN_VDD_180;
169 host->mmc->caps &= ~MMC_CAP_1_8V_DDR;
170 } else {
171 host->caps &= ~SDHCI_CAN_VDD_330;
172 }
173 host->caps1 &= ~(SDHCI_SUPPORT_SDR104 | SDHCI_USE_SDR50_TUNING);
174
175 return 0;
176 }
177
178 static void pxav3_reset(struct sdhci_host *host, u8 mask)
179 {
180 struct platform_device *pdev = to_platform_device(mmc_dev(host->mmc));
181 struct sdhci_pxa_platdata *pdata = pdev->dev.platform_data;
182
183 sdhci_reset(host, mask);
184
185 if (mask == SDHCI_RESET_ALL) {
186 /*
187 * tune timing of read data/command when crc error happen
188 * no performance impact
189 */
190 if (pdata && 0 != pdata->clk_delay_cycles) {
191 u16 tmp;
192
193 tmp = readw(host->ioaddr + SD_CLOCK_BURST_SIZE_SETUP);
194 tmp |= (pdata->clk_delay_cycles & SDCLK_DELAY_MASK)
195 << SDCLK_DELAY_SHIFT;
196 tmp |= SDCLK_SEL;
197 writew(tmp, host->ioaddr + SD_CLOCK_BURST_SIZE_SETUP);
198 }
199 }
200 }
201
202 #define MAX_WAIT_COUNT 5
203 static void pxav3_gen_init_74_clocks(struct sdhci_host *host, u8 power_mode)
204 {
205 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
206 struct sdhci_pxa *pxa = sdhci_pltfm_priv(pltfm_host);
207 u16 tmp;
208 int count;
209
210 if (pxa->power_mode == MMC_POWER_UP
211 && power_mode == MMC_POWER_ON) {
212
213 dev_dbg(mmc_dev(host->mmc),
214 "%s: slot->power_mode = %d,"
215 "ios->power_mode = %d\n",
216 __func__,
217 pxa->power_mode,
218 power_mode);
219
220 /* set we want notice of when 74 clocks are sent */
221 tmp = readw(host->ioaddr + SD_CE_ATA_2);
222 tmp |= SDCE_MISC_INT_EN;
223 writew(tmp, host->ioaddr + SD_CE_ATA_2);
224
225 /* start sending the 74 clocks */
226 tmp = readw(host->ioaddr + SD_CFG_FIFO_PARAM);
227 tmp |= SDCFG_GEN_PAD_CLK_ON;
228 writew(tmp, host->ioaddr + SD_CFG_FIFO_PARAM);
229
230 /* slowest speed is about 100KHz or 10usec per clock */
231 udelay(740);
232 count = 0;
233
234 while (count++ < MAX_WAIT_COUNT) {
235 if ((readw(host->ioaddr + SD_CE_ATA_2)
236 & SDCE_MISC_INT) == 0)
237 break;
238 udelay(10);
239 }
240
241 if (count == MAX_WAIT_COUNT)
242 dev_warn(mmc_dev(host->mmc), "74 clock interrupt not cleared\n");
243
244 /* clear the interrupt bit if posted */
245 tmp = readw(host->ioaddr + SD_CE_ATA_2);
246 tmp |= SDCE_MISC_INT;
247 writew(tmp, host->ioaddr + SD_CE_ATA_2);
248 }
249 pxa->power_mode = power_mode;
250 }
251
252 static void pxav3_set_uhs_signaling(struct sdhci_host *host, unsigned int uhs)
253 {
254 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
255 struct sdhci_pxa *pxa = sdhci_pltfm_priv(pltfm_host);
256 u16 ctrl_2;
257
258 /*
259 * Set V18_EN -- UHS modes do not work without this.
260 * does not change signaling voltage
261 */
262 ctrl_2 = sdhci_readw(host, SDHCI_HOST_CONTROL2);
263
264 /* Select Bus Speed Mode for host */
265 ctrl_2 &= ~SDHCI_CTRL_UHS_MASK;
266 switch (uhs) {
267 case MMC_TIMING_UHS_SDR12:
268 ctrl_2 |= SDHCI_CTRL_UHS_SDR12;
269 break;
270 case MMC_TIMING_UHS_SDR25:
271 ctrl_2 |= SDHCI_CTRL_UHS_SDR25;
272 break;
273 case MMC_TIMING_UHS_SDR50:
274 ctrl_2 |= SDHCI_CTRL_UHS_SDR50 | SDHCI_CTRL_VDD_180;
275 break;
276 case MMC_TIMING_UHS_SDR104:
277 ctrl_2 |= SDHCI_CTRL_UHS_SDR104 | SDHCI_CTRL_VDD_180;
278 break;
279 case MMC_TIMING_MMC_DDR52:
280 case MMC_TIMING_UHS_DDR50:
281 ctrl_2 |= SDHCI_CTRL_UHS_DDR50 | SDHCI_CTRL_VDD_180;
282 break;
283 }
284
285 /*
286 * Update SDIO3 Configuration register according to erratum
287 * FE-2946959
288 */
289 if (pxa->sdio3_conf_reg) {
290 u8 reg_val = readb(pxa->sdio3_conf_reg);
291
292 if (uhs == MMC_TIMING_UHS_SDR50 ||
293 uhs == MMC_TIMING_UHS_DDR50) {
294 reg_val &= ~SDIO3_CONF_CLK_INV;
295 reg_val |= SDIO3_CONF_SD_FB_CLK;
296 } else if (uhs == MMC_TIMING_MMC_HS) {
297 reg_val &= ~SDIO3_CONF_CLK_INV;
298 reg_val &= ~SDIO3_CONF_SD_FB_CLK;
299 } else {
300 reg_val |= SDIO3_CONF_CLK_INV;
301 reg_val &= ~SDIO3_CONF_SD_FB_CLK;
302 }
303 writeb(reg_val, pxa->sdio3_conf_reg);
304 }
305
306 sdhci_writew(host, ctrl_2, SDHCI_HOST_CONTROL2);
307 dev_dbg(mmc_dev(host->mmc),
308 "%s uhs = %d, ctrl_2 = %04X\n",
309 __func__, uhs, ctrl_2);
310 }
311
312 static void pxav3_set_power(struct sdhci_host *host, unsigned char mode,
313 unsigned short vdd)
314 {
315 struct mmc_host *mmc = host->mmc;
316 u8 pwr = host->pwr;
317
318 sdhci_set_power(host, mode, vdd);
319
320 if (host->pwr == pwr)
321 return;
322
323 if (host->pwr == 0)
324 vdd = 0;
325
326 if (!IS_ERR(mmc->supply.vmmc)) {
327 spin_unlock_irq(&host->lock);
328 mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, vdd);
329 spin_lock_irq(&host->lock);
330 }
331 }
332
333 static const struct sdhci_ops pxav3_sdhci_ops = {
334 .set_clock = sdhci_set_clock,
335 .set_power = pxav3_set_power,
336 .platform_send_init_74_clocks = pxav3_gen_init_74_clocks,
337 .get_max_clock = sdhci_pltfm_clk_get_max_clock,
338 .set_bus_width = sdhci_set_bus_width,
339 .reset = pxav3_reset,
340 .set_uhs_signaling = pxav3_set_uhs_signaling,
341 };
342
343 static struct sdhci_pltfm_data sdhci_pxav3_pdata = {
344 .quirks = SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK
345 | SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC
346 | SDHCI_QUIRK_32BIT_ADMA_SIZE
347 | SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN,
348 .ops = &pxav3_sdhci_ops,
349 };
350
351 #ifdef CONFIG_OF
352 static const struct of_device_id sdhci_pxav3_of_match[] = {
353 {
354 .compatible = "mrvl,pxav3-mmc",
355 },
356 {
357 .compatible = "marvell,armada-380-sdhci",
358 },
359 {},
360 };
361 MODULE_DEVICE_TABLE(of, sdhci_pxav3_of_match);
362
363 static struct sdhci_pxa_platdata *pxav3_get_mmc_pdata(struct device *dev)
364 {
365 struct sdhci_pxa_platdata *pdata;
366 struct device_node *np = dev->of_node;
367 u32 clk_delay_cycles;
368
369 pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
370 if (!pdata)
371 return NULL;
372
373 if (!of_property_read_u32(np, "mrvl,clk-delay-cycles",
374 &clk_delay_cycles))
375 pdata->clk_delay_cycles = clk_delay_cycles;
376
377 return pdata;
378 }
379 #else
380 static inline struct sdhci_pxa_platdata *pxav3_get_mmc_pdata(struct device *dev)
381 {
382 return NULL;
383 }
384 #endif
385
386 static int sdhci_pxav3_probe(struct platform_device *pdev)
387 {
388 struct sdhci_pltfm_host *pltfm_host;
389 struct sdhci_pxa_platdata *pdata = pdev->dev.platform_data;
390 struct device *dev = &pdev->dev;
391 struct device_node *np = pdev->dev.of_node;
392 struct sdhci_host *host = NULL;
393 struct sdhci_pxa *pxa = NULL;
394 const struct of_device_id *match;
395 int ret;
396
397 host = sdhci_pltfm_init(pdev, &sdhci_pxav3_pdata, sizeof(*pxa));
398 if (IS_ERR(host))
399 return PTR_ERR(host);
400
401 pltfm_host = sdhci_priv(host);
402 pxa = sdhci_pltfm_priv(pltfm_host);
403
404 pxa->clk_io = devm_clk_get(dev, "io");
405 if (IS_ERR(pxa->clk_io))
406 pxa->clk_io = devm_clk_get(dev, NULL);
407 if (IS_ERR(pxa->clk_io)) {
408 dev_err(dev, "failed to get io clock\n");
409 ret = PTR_ERR(pxa->clk_io);
410 goto err_clk_get;
411 }
412 pltfm_host->clk = pxa->clk_io;
413 clk_prepare_enable(pxa->clk_io);
414
415 pxa->clk_core = devm_clk_get(dev, "core");
416 if (!IS_ERR(pxa->clk_core))
417 clk_prepare_enable(pxa->clk_core);
418
419 /* enable 1/8V DDR capable */
420 host->mmc->caps |= MMC_CAP_1_8V_DDR;
421
422 if (of_device_is_compatible(np, "marvell,armada-380-sdhci")) {
423 ret = armada_38x_quirks(pdev, host);
424 if (ret < 0)
425 goto err_mbus_win;
426 ret = mv_conf_mbus_windows(pdev, mv_mbus_dram_info());
427 if (ret < 0)
428 goto err_mbus_win;
429 }
430
431 match = of_match_device(of_match_ptr(sdhci_pxav3_of_match), &pdev->dev);
432 if (match) {
433 ret = mmc_of_parse(host->mmc);
434 if (ret)
435 goto err_of_parse;
436 sdhci_get_of_property(pdev);
437 pdata = pxav3_get_mmc_pdata(dev);
438 pdev->dev.platform_data = pdata;
439 } else if (pdata) {
440 /* on-chip device */
441 if (pdata->flags & PXA_FLAG_CARD_PERMANENT)
442 host->mmc->caps |= MMC_CAP_NONREMOVABLE;
443
444 /* If slot design supports 8 bit data, indicate this to MMC. */
445 if (pdata->flags & PXA_FLAG_SD_8_BIT_CAPABLE_SLOT)
446 host->mmc->caps |= MMC_CAP_8_BIT_DATA;
447
448 if (pdata->quirks)
449 host->quirks |= pdata->quirks;
450 if (pdata->quirks2)
451 host->quirks2 |= pdata->quirks2;
452 if (pdata->host_caps)
453 host->mmc->caps |= pdata->host_caps;
454 if (pdata->host_caps2)
455 host->mmc->caps2 |= pdata->host_caps2;
456 if (pdata->pm_caps)
457 host->mmc->pm_caps |= pdata->pm_caps;
458
459 if (gpio_is_valid(pdata->ext_cd_gpio)) {
460 ret = mmc_gpio_request_cd(host->mmc, pdata->ext_cd_gpio,
461 0);
462 if (ret) {
463 dev_err(mmc_dev(host->mmc),
464 "failed to allocate card detect gpio\n");
465 goto err_cd_req;
466 }
467 }
468 }
469
470 pm_runtime_get_noresume(&pdev->dev);
471 pm_runtime_set_active(&pdev->dev);
472 pm_runtime_set_autosuspend_delay(&pdev->dev, PXAV3_RPM_DELAY_MS);
473 pm_runtime_use_autosuspend(&pdev->dev);
474 pm_runtime_enable(&pdev->dev);
475 pm_suspend_ignore_children(&pdev->dev, 1);
476
477 ret = sdhci_add_host(host);
478 if (ret) {
479 dev_err(&pdev->dev, "failed to add host\n");
480 goto err_add_host;
481 }
482
483 platform_set_drvdata(pdev, host);
484
485 if (host->mmc->pm_caps & MMC_PM_WAKE_SDIO_IRQ)
486 device_init_wakeup(&pdev->dev, 1);
487
488 pm_runtime_put_autosuspend(&pdev->dev);
489
490 return 0;
491
492 err_add_host:
493 pm_runtime_disable(&pdev->dev);
494 pm_runtime_put_noidle(&pdev->dev);
495 err_of_parse:
496 err_cd_req:
497 err_mbus_win:
498 clk_disable_unprepare(pxa->clk_io);
499 clk_disable_unprepare(pxa->clk_core);
500 err_clk_get:
501 sdhci_pltfm_free(pdev);
502 return ret;
503 }
504
505 static int sdhci_pxav3_remove(struct platform_device *pdev)
506 {
507 struct sdhci_host *host = platform_get_drvdata(pdev);
508 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
509 struct sdhci_pxa *pxa = sdhci_pltfm_priv(pltfm_host);
510
511 pm_runtime_get_sync(&pdev->dev);
512 pm_runtime_disable(&pdev->dev);
513 pm_runtime_put_noidle(&pdev->dev);
514
515 sdhci_remove_host(host, 1);
516
517 clk_disable_unprepare(pxa->clk_io);
518 clk_disable_unprepare(pxa->clk_core);
519
520 sdhci_pltfm_free(pdev);
521
522 return 0;
523 }
524
525 #ifdef CONFIG_PM_SLEEP
526 static int sdhci_pxav3_suspend(struct device *dev)
527 {
528 int ret;
529 struct sdhci_host *host = dev_get_drvdata(dev);
530
531 pm_runtime_get_sync(dev);
532 ret = sdhci_suspend_host(host);
533 pm_runtime_mark_last_busy(dev);
534 pm_runtime_put_autosuspend(dev);
535
536 return ret;
537 }
538
539 static int sdhci_pxav3_resume(struct device *dev)
540 {
541 int ret;
542 struct sdhci_host *host = dev_get_drvdata(dev);
543
544 pm_runtime_get_sync(dev);
545 ret = sdhci_resume_host(host);
546 pm_runtime_mark_last_busy(dev);
547 pm_runtime_put_autosuspend(dev);
548
549 return ret;
550 }
551 #endif
552
553 #ifdef CONFIG_PM
554 static int sdhci_pxav3_runtime_suspend(struct device *dev)
555 {
556 struct sdhci_host *host = dev_get_drvdata(dev);
557 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
558 struct sdhci_pxa *pxa = sdhci_pltfm_priv(pltfm_host);
559 int ret;
560
561 ret = sdhci_runtime_suspend_host(host);
562 if (ret)
563 return ret;
564
565 clk_disable_unprepare(pxa->clk_io);
566 if (!IS_ERR(pxa->clk_core))
567 clk_disable_unprepare(pxa->clk_core);
568
569 return 0;
570 }
571
572 static int sdhci_pxav3_runtime_resume(struct device *dev)
573 {
574 struct sdhci_host *host = dev_get_drvdata(dev);
575 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
576 struct sdhci_pxa *pxa = sdhci_pltfm_priv(pltfm_host);
577
578 clk_prepare_enable(pxa->clk_io);
579 if (!IS_ERR(pxa->clk_core))
580 clk_prepare_enable(pxa->clk_core);
581
582 return sdhci_runtime_resume_host(host);
583 }
584 #endif
585
586 #ifdef CONFIG_PM
587 static const struct dev_pm_ops sdhci_pxav3_pmops = {
588 SET_SYSTEM_SLEEP_PM_OPS(sdhci_pxav3_suspend, sdhci_pxav3_resume)
589 SET_RUNTIME_PM_OPS(sdhci_pxav3_runtime_suspend,
590 sdhci_pxav3_runtime_resume, NULL)
591 };
592
593 #define SDHCI_PXAV3_PMOPS (&sdhci_pxav3_pmops)
594
595 #else
596 #define SDHCI_PXAV3_PMOPS NULL
597 #endif
598
599 static struct platform_driver sdhci_pxav3_driver = {
600 .driver = {
601 .name = "sdhci-pxav3",
602 .of_match_table = of_match_ptr(sdhci_pxav3_of_match),
603 .pm = SDHCI_PXAV3_PMOPS,
604 },
605 .probe = sdhci_pxav3_probe,
606 .remove = sdhci_pxav3_remove,
607 };
608
609 module_platform_driver(sdhci_pxav3_driver);
610
611 MODULE_DESCRIPTION("SDHCI driver for pxav3");
612 MODULE_AUTHOR("Marvell International Ltd.");
613 MODULE_LICENSE("GPL v2");
614
Linux kernel - Deliverables
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