1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * sdhci-brcmstb.c Support for SDHCI on Broadcom BRCMSTB SoC's 4 * 5 * Copyright (C) 2015 Broadcom Corporation 6 */ 7 8 #include <linux/io.h> 9 #include <linux/iopoll.h> 10 #include <linux/mmc/host.h> 11 #include <linux/module.h> 12 #include <linux/of.h> 13 #include <linux/bitops.h> 14 #include <linux/delay.h> 15 16 #include "sdhci-cqhci.h" 17 #include "sdhci-pltfm.h" 18 #include "cqhci.h" 19 20 #define SDHCI_VENDOR 0x78 21 #define SDHCI_VENDOR_ENHANCED_STRB 0x1 22 #define SDHCI_VENDOR_GATE_SDCLK_EN 0x2 23 24 #define BRCMSTB_MATCH_FLAGS_NO_64BIT BIT(0) 25 #define BRCMSTB_MATCH_FLAGS_BROKEN_TIMEOUT BIT(1) 26 #define BRCMSTB_MATCH_FLAGS_HAS_CLOCK_GATE BIT(2) 27 #define BRCMSTB_MATCH_FLAGS_USE_CARD_BUSY BIT(4) 28 29 #define BRCMSTB_PRIV_FLAGS_HAS_CQE BIT(0) 30 #define BRCMSTB_PRIV_FLAGS_GATE_CLOCK BIT(1) 31 32 #define SDHCI_ARASAN_CQE_BASE_ADDR 0x200 33 34 #define SDIO_CFG_CQ_CAPABILITY 0x4c 35 #define SDIO_CFG_CQ_CAPABILITY_FMUL GENMASK(13, 12) 36 37 #define SDIO_CFG_CTRL 0x0 38 #define SDIO_CFG_CTRL_SDCD_N_TEST_EN BIT(31) 39 #define SDIO_CFG_CTRL_SDCD_N_TEST_LEV BIT(30) 40 41 #define SDIO_CFG_MAX_50MHZ_MODE 0x1ac 42 #define SDIO_CFG_MAX_50MHZ_MODE_STRAP_OVERRIDE BIT(31) 43 #define SDIO_CFG_MAX_50MHZ_MODE_ENABLE BIT(0) 44 45 #define MMC_CAP_HSE_MASK (MMC_CAP2_HSX00_1_2V | MMC_CAP2_HSX00_1_8V) 46 /* Select all SD UHS type I SDR speed above 50MB/s */ 47 #define MMC_CAP_UHS_I_SDR_MASK (MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR104) 48 49 struct sdhci_brcmstb_priv { 50 void __iomem *cfg_regs; 51 unsigned int flags; 52 struct clk *base_clk; 53 u32 base_freq_hz; 54 }; 55 56 struct brcmstb_match_priv { 57 void (*cfginit)(struct sdhci_host *host); 58 void (*hs400es)(struct mmc_host *mmc, struct mmc_ios *ios); 59 struct sdhci_ops *ops; 60 const unsigned int flags; 61 }; 62 63 static inline void enable_clock_gating(struct sdhci_host *host) 64 { 65 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 66 struct sdhci_brcmstb_priv *priv = sdhci_pltfm_priv(pltfm_host); 67 u32 reg; 68 69 if (!(priv->flags & BRCMSTB_PRIV_FLAGS_GATE_CLOCK)) 70 return; 71 72 reg = sdhci_readl(host, SDHCI_VENDOR); 73 reg |= SDHCI_VENDOR_GATE_SDCLK_EN; 74 sdhci_writel(host, reg, SDHCI_VENDOR); 75 } 76 77 static void brcmstb_reset(struct sdhci_host *host, u8 mask) 78 { 79 sdhci_and_cqhci_reset(host, mask); 80 81 /* Reset will clear this, so re-enable it */ 82 enable_clock_gating(host); 83 } 84 85 static void brcmstb_sdhci_reset_cmd_data(struct sdhci_host *host, u8 mask) 86 { 87 u32 new_mask = (mask & (SDHCI_RESET_CMD | SDHCI_RESET_DATA)) << 24; 88 int ret; 89 u32 reg; 90 91 /* 92 * SDHCI_CLOCK_CONTROL register CARD_EN and CLOCK_INT_EN bits shall 93 * be set along with SOFTWARE_RESET register RESET_CMD or RESET_DATA 94 * bits, hence access SDHCI_CLOCK_CONTROL register as 32-bit register 95 */ 96 new_mask |= SDHCI_CLOCK_CARD_EN | SDHCI_CLOCK_INT_EN; 97 reg = sdhci_readl(host, SDHCI_CLOCK_CONTROL); 98 sdhci_writel(host, reg | new_mask, SDHCI_CLOCK_CONTROL); 99 100 reg = sdhci_readb(host, SDHCI_SOFTWARE_RESET); 101 102 ret = read_poll_timeout_atomic(sdhci_readb, reg, !(reg & mask), 103 10, 10000, false, 104 host, SDHCI_SOFTWARE_RESET); 105 106 if (ret) { 107 pr_err("%s: Reset 0x%x never completed.\n", 108 mmc_hostname(host->mmc), (int)mask); 109 sdhci_err_stats_inc(host, CTRL_TIMEOUT); 110 sdhci_dumpregs(host); 111 } 112 } 113 114 static void brcmstb_reset_74165b0(struct sdhci_host *host, u8 mask) 115 { 116 /* take care of RESET_ALL as usual */ 117 if (mask & SDHCI_RESET_ALL) 118 sdhci_and_cqhci_reset(host, SDHCI_RESET_ALL); 119 120 /* cmd and/or data treated differently on this core */ 121 if (mask & (SDHCI_RESET_CMD | SDHCI_RESET_DATA)) 122 brcmstb_sdhci_reset_cmd_data(host, mask); 123 124 /* Reset will clear this, so re-enable it */ 125 enable_clock_gating(host); 126 } 127 128 static void sdhci_brcmstb_hs400es(struct mmc_host *mmc, struct mmc_ios *ios) 129 { 130 struct sdhci_host *host = mmc_priv(mmc); 131 132 u32 reg; 133 134 dev_dbg(mmc_dev(mmc), "%s(): Setting HS400-Enhanced-Strobe mode\n", 135 __func__); 136 reg = readl(host->ioaddr + SDHCI_VENDOR); 137 if (ios->enhanced_strobe) 138 reg |= SDHCI_VENDOR_ENHANCED_STRB; 139 else 140 reg &= ~SDHCI_VENDOR_ENHANCED_STRB; 141 writel(reg, host->ioaddr + SDHCI_VENDOR); 142 } 143 144 static void sdhci_brcmstb_set_clock(struct sdhci_host *host, unsigned int clock) 145 { 146 u16 clk; 147 148 host->mmc->actual_clock = 0; 149 150 clk = sdhci_calc_clk(host, clock, &host->mmc->actual_clock); 151 sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL); 152 153 if (clock == 0) 154 return; 155 156 sdhci_enable_clk(host, clk); 157 } 158 159 static void sdhci_brcmstb_set_uhs_signaling(struct sdhci_host *host, 160 unsigned int timing) 161 { 162 u16 ctrl_2; 163 164 dev_dbg(mmc_dev(host->mmc), "%s: Setting UHS signaling for %d timing\n", 165 __func__, timing); 166 ctrl_2 = sdhci_readw(host, SDHCI_HOST_CONTROL2); 167 /* Select Bus Speed Mode for host */ 168 ctrl_2 &= ~SDHCI_CTRL_UHS_MASK; 169 if ((timing == MMC_TIMING_MMC_HS200) || 170 (timing == MMC_TIMING_UHS_SDR104)) 171 ctrl_2 |= SDHCI_CTRL_UHS_SDR104; 172 else if (timing == MMC_TIMING_UHS_SDR12) 173 ctrl_2 |= SDHCI_CTRL_UHS_SDR12; 174 else if (timing == MMC_TIMING_SD_HS || 175 timing == MMC_TIMING_MMC_HS || 176 timing == MMC_TIMING_UHS_SDR25) 177 ctrl_2 |= SDHCI_CTRL_UHS_SDR25; 178 else if (timing == MMC_TIMING_UHS_SDR50) 179 ctrl_2 |= SDHCI_CTRL_UHS_SDR50; 180 else if ((timing == MMC_TIMING_UHS_DDR50) || 181 (timing == MMC_TIMING_MMC_DDR52)) 182 ctrl_2 |= SDHCI_CTRL_UHS_DDR50; 183 else if (timing == MMC_TIMING_MMC_HS400) 184 ctrl_2 |= SDHCI_CTRL_HS400; /* Non-standard */ 185 sdhci_writew(host, ctrl_2, SDHCI_HOST_CONTROL2); 186 } 187 188 static void sdhci_brcmstb_cfginit_2712(struct sdhci_host *host) 189 { 190 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 191 struct sdhci_brcmstb_priv *brcmstb_priv = sdhci_pltfm_priv(pltfm_host); 192 u32 reg; 193 194 /* 195 * If we support a speed that requires tuning, 196 * then select the delay line PHY as the clock source. 197 */ 198 if ((host->mmc->caps & MMC_CAP_UHS_I_SDR_MASK) || (host->mmc->caps2 & MMC_CAP_HSE_MASK)) { 199 reg = readl(brcmstb_priv->cfg_regs + SDIO_CFG_MAX_50MHZ_MODE); 200 reg &= ~SDIO_CFG_MAX_50MHZ_MODE_ENABLE; 201 reg |= SDIO_CFG_MAX_50MHZ_MODE_STRAP_OVERRIDE; 202 writel(reg, brcmstb_priv->cfg_regs + SDIO_CFG_MAX_50MHZ_MODE); 203 } 204 205 if ((host->mmc->caps & MMC_CAP_NONREMOVABLE) || 206 (host->mmc->caps & MMC_CAP_NEEDS_POLL)) { 207 /* Force presence */ 208 reg = readl(brcmstb_priv->cfg_regs + SDIO_CFG_CTRL); 209 reg &= ~SDIO_CFG_CTRL_SDCD_N_TEST_LEV; 210 reg |= SDIO_CFG_CTRL_SDCD_N_TEST_EN; 211 writel(reg, brcmstb_priv->cfg_regs + SDIO_CFG_CTRL); 212 } 213 } 214 215 static void sdhci_brcmstb_dumpregs(struct mmc_host *mmc) 216 { 217 sdhci_dumpregs(mmc_priv(mmc)); 218 } 219 220 static void sdhci_brcmstb_cqe_enable(struct mmc_host *mmc) 221 { 222 struct sdhci_host *host = mmc_priv(mmc); 223 u32 reg; 224 225 reg = sdhci_readl(host, SDHCI_PRESENT_STATE); 226 while (reg & SDHCI_DATA_AVAILABLE) { 227 sdhci_readl(host, SDHCI_BUFFER); 228 reg = sdhci_readl(host, SDHCI_PRESENT_STATE); 229 } 230 231 sdhci_cqe_enable(mmc); 232 } 233 234 static const struct cqhci_host_ops sdhci_brcmstb_cqhci_ops = { 235 .enable = sdhci_brcmstb_cqe_enable, 236 .disable = sdhci_cqe_disable, 237 .dumpregs = sdhci_brcmstb_dumpregs, 238 }; 239 240 static struct sdhci_ops sdhci_brcmstb_ops = { 241 .set_clock = sdhci_set_clock, 242 .set_bus_width = sdhci_set_bus_width, 243 .reset = sdhci_reset, 244 .set_uhs_signaling = sdhci_set_uhs_signaling, 245 }; 246 247 static struct sdhci_ops sdhci_brcmstb_ops_2712 = { 248 .set_clock = sdhci_set_clock, 249 .set_power = sdhci_set_power_and_bus_voltage, 250 .set_bus_width = sdhci_set_bus_width, 251 .reset = sdhci_reset, 252 .set_uhs_signaling = sdhci_set_uhs_signaling, 253 }; 254 255 static struct sdhci_ops sdhci_brcmstb_ops_7216 = { 256 .set_clock = sdhci_brcmstb_set_clock, 257 .set_bus_width = sdhci_set_bus_width, 258 .reset = brcmstb_reset, 259 .set_uhs_signaling = sdhci_brcmstb_set_uhs_signaling, 260 }; 261 262 static struct sdhci_ops sdhci_brcmstb_ops_74165b0 = { 263 .set_clock = sdhci_brcmstb_set_clock, 264 .set_bus_width = sdhci_set_bus_width, 265 .reset = brcmstb_reset_74165b0, 266 .set_uhs_signaling = sdhci_brcmstb_set_uhs_signaling, 267 }; 268 269 static const struct brcmstb_match_priv match_priv_2712 = { 270 .cfginit = sdhci_brcmstb_cfginit_2712, 271 .ops = &sdhci_brcmstb_ops_2712, 272 }; 273 274 static struct brcmstb_match_priv match_priv_7425 = { 275 .flags = BRCMSTB_MATCH_FLAGS_NO_64BIT | 276 BRCMSTB_MATCH_FLAGS_BROKEN_TIMEOUT, 277 .ops = &sdhci_brcmstb_ops, 278 }; 279 280 static struct brcmstb_match_priv match_priv_7445 = { 281 .flags = BRCMSTB_MATCH_FLAGS_BROKEN_TIMEOUT, 282 .ops = &sdhci_brcmstb_ops, 283 }; 284 285 static const struct brcmstb_match_priv match_priv_7216 = { 286 .flags = BRCMSTB_MATCH_FLAGS_HAS_CLOCK_GATE, 287 .hs400es = sdhci_brcmstb_hs400es, 288 .ops = &sdhci_brcmstb_ops_7216, 289 }; 290 291 static struct brcmstb_match_priv match_priv_74165b0 = { 292 .flags = BRCMSTB_MATCH_FLAGS_HAS_CLOCK_GATE, 293 .hs400es = sdhci_brcmstb_hs400es, 294 .ops = &sdhci_brcmstb_ops_74165b0, 295 }; 296 297 static const struct of_device_id __maybe_unused sdhci_brcm_of_match[] = { 298 { .compatible = "brcm,bcm2712-sdhci", .data = &match_priv_2712 }, 299 { .compatible = "brcm,bcm7425-sdhci", .data = &match_priv_7425 }, 300 { .compatible = "brcm,bcm7445-sdhci", .data = &match_priv_7445 }, 301 { .compatible = "brcm,bcm7216-sdhci", .data = &match_priv_7216 }, 302 { .compatible = "brcm,bcm74165b0-sdhci", .data = &match_priv_74165b0 }, 303 {}, 304 }; 305 306 static u32 sdhci_brcmstb_cqhci_irq(struct sdhci_host *host, u32 intmask) 307 { 308 int cmd_error = 0; 309 int data_error = 0; 310 311 if (!sdhci_cqe_irq(host, intmask, &cmd_error, &data_error)) 312 return intmask; 313 314 cqhci_irq(host->mmc, intmask, cmd_error, data_error); 315 316 return 0; 317 } 318 319 static int sdhci_brcmstb_add_host(struct sdhci_host *host, 320 struct sdhci_brcmstb_priv *priv) 321 { 322 struct cqhci_host *cq_host; 323 bool dma64; 324 int ret; 325 326 if ((priv->flags & BRCMSTB_PRIV_FLAGS_HAS_CQE) == 0) 327 return sdhci_add_host(host); 328 329 dev_dbg(mmc_dev(host->mmc), "CQE is enabled\n"); 330 host->mmc->caps2 |= MMC_CAP2_CQE | MMC_CAP2_CQE_DCMD; 331 ret = sdhci_setup_host(host); 332 if (ret) 333 return ret; 334 335 cq_host = devm_kzalloc(mmc_dev(host->mmc), 336 sizeof(*cq_host), GFP_KERNEL); 337 if (!cq_host) { 338 ret = -ENOMEM; 339 goto cleanup; 340 } 341 342 cq_host->mmio = host->ioaddr + SDHCI_ARASAN_CQE_BASE_ADDR; 343 cq_host->ops = &sdhci_brcmstb_cqhci_ops; 344 345 dma64 = host->flags & SDHCI_USE_64_BIT_DMA; 346 if (dma64) { 347 dev_dbg(mmc_dev(host->mmc), "Using 64 bit DMA\n"); 348 cq_host->caps |= CQHCI_TASK_DESC_SZ_128; 349 } 350 351 ret = cqhci_init(cq_host, host->mmc, dma64); 352 if (ret) 353 goto cleanup; 354 355 ret = __sdhci_add_host(host); 356 if (ret) 357 goto cleanup; 358 359 return 0; 360 361 cleanup: 362 sdhci_cleanup_host(host); 363 return ret; 364 } 365 366 static int sdhci_brcmstb_probe(struct platform_device *pdev) 367 { 368 const struct brcmstb_match_priv *match_priv; 369 struct sdhci_pltfm_data brcmstb_pdata; 370 struct sdhci_pltfm_host *pltfm_host; 371 const struct of_device_id *match; 372 struct sdhci_brcmstb_priv *priv; 373 u32 actual_clock_mhz; 374 struct sdhci_host *host; 375 struct clk *clk; 376 struct clk *base_clk = NULL; 377 int res; 378 379 match = of_match_node(sdhci_brcm_of_match, pdev->dev.of_node); 380 match_priv = match->data; 381 382 dev_dbg(&pdev->dev, "Probe found match for %s\n", match->compatible); 383 384 clk = devm_clk_get_optional_enabled(&pdev->dev, NULL); 385 if (IS_ERR(clk)) 386 return dev_err_probe(&pdev->dev, PTR_ERR(clk), 387 "Failed to get and enable clock from Device Tree\n"); 388 389 memset(&brcmstb_pdata, 0, sizeof(brcmstb_pdata)); 390 brcmstb_pdata.ops = match_priv->ops; 391 host = sdhci_pltfm_init(pdev, &brcmstb_pdata, 392 sizeof(struct sdhci_brcmstb_priv)); 393 if (IS_ERR(host)) 394 return PTR_ERR(host); 395 396 pltfm_host = sdhci_priv(host); 397 priv = sdhci_pltfm_priv(pltfm_host); 398 if (device_property_read_bool(&pdev->dev, "supports-cqe")) { 399 priv->flags |= BRCMSTB_PRIV_FLAGS_HAS_CQE; 400 match_priv->ops->irq = sdhci_brcmstb_cqhci_irq; 401 } 402 403 /* Map in the non-standard CFG registers */ 404 priv->cfg_regs = devm_platform_get_and_ioremap_resource(pdev, 1, NULL); 405 if (IS_ERR(priv->cfg_regs)) { 406 res = PTR_ERR(priv->cfg_regs); 407 goto err; 408 } 409 410 sdhci_get_of_property(pdev); 411 res = mmc_of_parse(host->mmc); 412 if (res) 413 goto err; 414 415 /* 416 * Automatic clock gating does not work for SD cards that may 417 * voltage switch so only enable it for non-removable devices. 418 */ 419 if ((match_priv->flags & BRCMSTB_MATCH_FLAGS_HAS_CLOCK_GATE) && 420 (host->mmc->caps & MMC_CAP_NONREMOVABLE)) 421 priv->flags |= BRCMSTB_PRIV_FLAGS_GATE_CLOCK; 422 423 /* 424 * If the chip has enhanced strobe and it's enabled, add 425 * callback 426 */ 427 if (match_priv->hs400es && 428 (host->mmc->caps2 & MMC_CAP2_HS400_ES)) 429 host->mmc_host_ops.hs400_enhanced_strobe = match_priv->hs400es; 430 431 if (match_priv->cfginit) 432 match_priv->cfginit(host); 433 434 /* 435 * Supply the existing CAPS, but clear the UHS modes. This 436 * will allow these modes to be specified by device tree 437 * properties through mmc_of_parse(). 438 */ 439 sdhci_read_caps(host); 440 if (match_priv->flags & BRCMSTB_MATCH_FLAGS_NO_64BIT) 441 host->caps &= ~SDHCI_CAN_64BIT; 442 host->caps1 &= ~(SDHCI_SUPPORT_SDR50 | SDHCI_SUPPORT_SDR104 | 443 SDHCI_SUPPORT_DDR50); 444 445 if (match_priv->flags & BRCMSTB_MATCH_FLAGS_BROKEN_TIMEOUT) 446 host->quirks |= SDHCI_QUIRK_BROKEN_TIMEOUT_VAL; 447 448 if (!(match_priv->flags & BRCMSTB_MATCH_FLAGS_USE_CARD_BUSY)) 449 host->mmc_host_ops.card_busy = NULL; 450 451 /* Change the base clock frequency if the DT property exists */ 452 if (device_property_read_u32(&pdev->dev, "clock-frequency", 453 &priv->base_freq_hz) != 0) 454 goto add_host; 455 456 base_clk = devm_clk_get_optional(&pdev->dev, "sdio_freq"); 457 if (IS_ERR(base_clk)) { 458 dev_warn(&pdev->dev, "Clock for \"sdio_freq\" not found\n"); 459 goto add_host; 460 } 461 462 res = clk_prepare_enable(base_clk); 463 if (res) 464 goto err; 465 466 /* set improved clock rate */ 467 clk_set_rate(base_clk, priv->base_freq_hz); 468 actual_clock_mhz = clk_get_rate(base_clk) / 1000000; 469 470 host->caps &= ~SDHCI_CLOCK_V3_BASE_MASK; 471 host->caps |= (actual_clock_mhz << SDHCI_CLOCK_BASE_SHIFT); 472 /* Disable presets because they are now incorrect */ 473 host->quirks2 |= SDHCI_QUIRK2_PRESET_VALUE_BROKEN; 474 475 dev_dbg(&pdev->dev, "Base Clock Frequency changed to %dMHz\n", 476 actual_clock_mhz); 477 priv->base_clk = base_clk; 478 479 add_host: 480 res = sdhci_brcmstb_add_host(host, priv); 481 if (res) 482 goto err; 483 484 pltfm_host->clk = clk; 485 return res; 486 487 err: 488 sdhci_pltfm_free(pdev); 489 clk_disable_unprepare(base_clk); 490 return res; 491 } 492 493 static void sdhci_brcmstb_shutdown(struct platform_device *pdev) 494 { 495 sdhci_pltfm_suspend(&pdev->dev); 496 } 497 498 MODULE_DEVICE_TABLE(of, sdhci_brcm_of_match); 499 500 #ifdef CONFIG_PM_SLEEP 501 static int sdhci_brcmstb_suspend(struct device *dev) 502 { 503 struct sdhci_host *host = dev_get_drvdata(dev); 504 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 505 struct sdhci_brcmstb_priv *priv = sdhci_pltfm_priv(pltfm_host); 506 507 clk_disable_unprepare(priv->base_clk); 508 return sdhci_pltfm_suspend(dev); 509 } 510 511 static int sdhci_brcmstb_resume(struct device *dev) 512 { 513 struct sdhci_host *host = dev_get_drvdata(dev); 514 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 515 struct sdhci_brcmstb_priv *priv = sdhci_pltfm_priv(pltfm_host); 516 int ret; 517 518 ret = sdhci_pltfm_resume(dev); 519 if (!ret && priv->base_freq_hz) { 520 ret = clk_prepare_enable(priv->base_clk); 521 /* 522 * Note: using clk_get_rate() below as clk_get_rate() 523 * honors CLK_GET_RATE_NOCACHE attribute, but clk_set_rate() 524 * may do implicit get_rate() calls that do not honor 525 * CLK_GET_RATE_NOCACHE. 526 */ 527 if (!ret && 528 (clk_get_rate(priv->base_clk) != priv->base_freq_hz)) 529 ret = clk_set_rate(priv->base_clk, priv->base_freq_hz); 530 } 531 532 return ret; 533 } 534 #endif 535 536 static const struct dev_pm_ops sdhci_brcmstb_pmops = { 537 SET_SYSTEM_SLEEP_PM_OPS(sdhci_brcmstb_suspend, sdhci_brcmstb_resume) 538 }; 539 540 static struct platform_driver sdhci_brcmstb_driver = { 541 .driver = { 542 .name = "sdhci-brcmstb", 543 .probe_type = PROBE_PREFER_ASYNCHRONOUS, 544 .pm = &sdhci_brcmstb_pmops, 545 .of_match_table = of_match_ptr(sdhci_brcm_of_match), 546 }, 547 .probe = sdhci_brcmstb_probe, 548 .remove = sdhci_pltfm_remove, 549 .shutdown = sdhci_brcmstb_shutdown, 550 }; 551 552 module_platform_driver(sdhci_brcmstb_driver); 553 554 MODULE_DESCRIPTION("SDHCI driver for Broadcom BRCMSTB SoCs"); 555 MODULE_AUTHOR("Broadcom"); 556 MODULE_LICENSE("GPL v2"); 557