3  * davinci_mmc.c - TI DaVinci MMC/SD/SDIO driver
16 #include <linux/mmc/host.h>
22 #include <linux/mmc/mmc.h>
25 #include <linux/mmc/slot-gpio.h>
28 #include <linux/platform_data/mmc-davinci.h>
171 	struct mmc_host *mmc;  member
203 	/* Version of the MMC/SD controller */
274 	dev_dbg(mmc_dev(host->mmc), "CMD%d, arg 0x%08x%s\n",  in mmc_davinci_start_command()
315 		dev_dbg(mmc_dev(host->mmc), "unknown resp_type %04x\n",  in mmc_davinci_start_command()
424 			dev_dbg(mmc_dev(host->mmc),  in mmc_davinci_send_dma_request()
446 			dev_dbg(mmc_dev(host->mmc),  in mmc_davinci_send_dma_request()
467 	host->sg_len = dma_map_sg(mmc_dev(host->mmc), data->sg, data->sg_len,  in mmc_davinci_start_dma_transfer()
473 			dma_unmap_sg(mmc_dev(host->mmc),  in mmc_davinci_start_dma_transfer()
497 	host->dma_tx = dma_request_chan(mmc_dev(host->mmc), "tx");  in davinci_acquire_dma_channels()
499 		dev_err(mmc_dev(host->mmc), "Can't get dma_tx channel\n");  in davinci_acquire_dma_channels()
503 	host->dma_rx = dma_request_chan(mmc_dev(host->mmc), "rx");  in davinci_acquire_dma_channels()
505 		dev_err(mmc_dev(host->mmc), "Can't get dma_rx channel\n");  in davinci_acquire_dma_channels()
533 	dev_dbg(mmc_dev(host->mmc), "%s, %d blocks of %d bytes\n",  in mmc_davinci_prepare_data()
536 	dev_dbg(mmc_dev(host->mmc), "  DTO %d cycles + %d ns\n",  in mmc_davinci_prepare_data()
585 static void mmc_davinci_request(struct mmc_host *mmc, struct mmc_request *req)  in mmc_davinci_request()  argument
587 	struct mmc_davinci_host *host = mmc_priv(mmc);  in mmc_davinci_request()
601 		dev_err(mmc_dev(host->mmc), "still BUSY? bad ... \n");  in mmc_davinci_request()
603 		mmc_request_done(mmc, req);  in mmc_davinci_request()
640 static void calculate_clk_divider(struct mmc_host *mmc, struct mmc_ios *ios)  in calculate_clk_divider()  argument
644 	struct mmc_davinci_host *host = mmc_priv(mmc);  in calculate_clk_divider()
686 static void mmc_davinci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)  in mmc_davinci_set_ios()  argument
688 	struct mmc_davinci_host *host = mmc_priv(mmc);  in mmc_davinci_set_ios()
689 	struct platform_device *pdev = to_platform_device(mmc->parent);  in mmc_davinci_set_ios()
692 	dev_dbg(mmc_dev(host->mmc),  in mmc_davinci_set_ios()
710 		dev_dbg(mmc_dev(host->mmc), "Enabling 8 bit mode\n");  in mmc_davinci_set_ios()
716 		dev_dbg(mmc_dev(host->mmc), "Enabling 4 bit mode\n");  in mmc_davinci_set_ios()
727 		dev_dbg(mmc_dev(host->mmc), "Enabling 1 bit mode\n");  in mmc_davinci_set_ios()
739 	calculate_clk_divider(mmc, ios);  in mmc_davinci_set_ios()
759 			dev_warn(mmc_dev(host->mmc), "powerup timeout\n");  in mmc_davinci_set_ios()
770 	if (host->mmc->caps & MMC_CAP_SDIO_IRQ) {  in mmc_davinci_xfer_done()
779 			mmc_signal_sdio_irq(host->mmc);  in mmc_davinci_xfer_done()
786 		dma_unmap_sg(mmc_dev(host->mmc), data->sg, data->sg_len,  in mmc_davinci_xfer_done()
793 		mmc_request_done(host->mmc, data->mrq);  in mmc_davinci_xfer_done()
821 		mmc_request_done(host->mmc, cmd->mrq);  in mmc_davinci_cmd_done()
856 		dev_dbg(mmc_dev(host->mmc),  in mmc_davinci_sdio_irq()
859 		mmc_signal_sdio_irq(host->mmc);  in mmc_davinci_sdio_irq()
874 		dev_dbg(mmc_dev(host->mmc),  in mmc_davinci_irq()
932 			dev_err(mmc_dev(host->mmc),  in mmc_davinci_irq()
942 		dev_dbg(mmc_dev(host->mmc),  in mmc_davinci_irq()
966 		dev_dbg(mmc_dev(host->mmc), "data %s %s error\n",  in mmc_davinci_irq()
976 			dev_dbg(mmc_dev(host->mmc),  in mmc_davinci_irq()
990 		dev_dbg(mmc_dev(host->mmc), "Command CRC error\n");  in mmc_davinci_irq()
1009 static int mmc_davinci_get_cd(struct mmc_host *mmc)  in mmc_davinci_get_cd()  argument
1011 	struct platform_device *pdev = to_platform_device(mmc->parent);  in mmc_davinci_get_cd()
1017 	return mmc_gpio_get_cd(mmc);  in mmc_davinci_get_cd()
1020 static int mmc_davinci_get_ro(struct mmc_host *mmc)  in mmc_davinci_get_ro()  argument
1022 	struct platform_device *pdev = to_platform_device(mmc->parent);  in mmc_davinci_get_ro()
1028 	return mmc_gpio_get_ro(mmc);  in mmc_davinci_get_ro()
1031 static void mmc_davinci_enable_sdio_irq(struct mmc_host *mmc, int enable)  in mmc_davinci_enable_sdio_irq()  argument
1033 	struct mmc_davinci_host *host = mmc_priv(mmc);  in mmc_davinci_enable_sdio_irq()
1038 			mmc_signal_sdio_irq(host->mmc);  in mmc_davinci_enable_sdio_irq()
1067 	struct mmc_host *mmc;  in mmc_davinci_cpufreq_transition()  local
1071 	mmc = host->mmc;  in mmc_davinci_cpufreq_transition()
1075 		spin_lock_irqsave(&mmc->lock, flags);  in mmc_davinci_cpufreq_transition()
1077 		calculate_clk_divider(mmc, &mmc->ios);  in mmc_davinci_cpufreq_transition()
1078 		spin_unlock_irqrestore(&mmc->lock, flags);  in mmc_davinci_cpufreq_transition()
1123 		.name	= "dm6441-mmc",
1126 		.name	= "da830-mmc",
1135 		.compatible = "ti,dm6441-mmc",
1139 		.compatible = "ti,da830-mmc",
1146 static int mmc_davinci_parse_pdata(struct mmc_host *mmc)  in mmc_davinci_parse_pdata()  argument
1148 	struct platform_device *pdev = to_platform_device(mmc->parent);  in mmc_davinci_parse_pdata()
1156 	host = mmc_priv(mmc);  in mmc_davinci_parse_pdata()
1164 		mmc->caps |= MMC_CAP_4_BIT_DATA;  in mmc_davinci_parse_pdata()
1167 		mmc->caps |= (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA);  in mmc_davinci_parse_pdata()
1169 	mmc->f_min = 312500;  in mmc_davinci_parse_pdata()
1170 	mmc->f_max = 25000000;  in mmc_davinci_parse_pdata()
1172 		mmc->f_max = pdata->max_freq;  in mmc_davinci_parse_pdata()
1174 		mmc->caps |= pdata->caps;  in mmc_davinci_parse_pdata()
1177 	ret = mmc_gpiod_request_cd(mmc, "cd", 0, false, 0);  in mmc_davinci_parse_pdata()
1181 		mmc->caps |= MMC_CAP_NEEDS_POLL;  in mmc_davinci_parse_pdata()
1183 	ret = mmc_gpiod_request_ro(mmc, "wp", 0, 0);  in mmc_davinci_parse_pdata()
1194 	struct mmc_host *mmc = NULL;  in davinci_mmcsd_probe()  local
1213 	mmc = mmc_alloc_host(sizeof(struct mmc_davinci_host), &pdev->dev);  in davinci_mmcsd_probe()
1214 	if (!mmc)  in davinci_mmcsd_probe()
1217 	host = mmc_priv(mmc);  in davinci_mmcsd_probe()
1218 	host->mmc = mmc;	/* Important */  in davinci_mmcsd_probe()
1241 		ret = mmc_of_parse(mmc);  in davinci_mmcsd_probe()
1248 		ret = mmc_davinci_parse_pdata(mmc);  in davinci_mmcsd_probe()
1272 	mmc->caps |= MMC_CAP_WAIT_WHILE_BUSY;  in davinci_mmcsd_probe()
1278 	mmc->ops = &mmc_davinci_ops;  in davinci_mmcsd_probe()
1279 	mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34;  in davinci_mmcsd_probe()
1285 	mmc->max_segs		= MAX_NR_SG;  in davinci_mmcsd_probe()
1288 	mmc->max_seg_size	= MAX_CCNT * rw_threshold;  in davinci_mmcsd_probe()
1290 	/* MMC/SD controller limits for multiblock requests */  in davinci_mmcsd_probe()
1291 	mmc->max_blk_size	= 4095;  /* BLEN is 12 bits */  in davinci_mmcsd_probe()
1292 	mmc->max_blk_count	= 65535; /* NBLK is 16 bits */  in davinci_mmcsd_probe()
1293 	mmc->max_req_size	= mmc->max_blk_size * mmc->max_blk_count;  in davinci_mmcsd_probe()
1295 	dev_dbg(mmc_dev(host->mmc), "max_segs=%d\n", mmc->max_segs);  in davinci_mmcsd_probe()
1296 	dev_dbg(mmc_dev(host->mmc), "max_blk_size=%d\n", mmc->max_blk_size);  in davinci_mmcsd_probe()
1297 	dev_dbg(mmc_dev(host->mmc), "max_req_size=%d\n", mmc->max_req_size);  in davinci_mmcsd_probe()
1298 	dev_dbg(mmc_dev(host->mmc), "max_seg_size=%d\n", mmc->max_seg_size);  in davinci_mmcsd_probe()
1308 	ret = mmc_add_host(mmc);  in davinci_mmcsd_probe()
1313 			       mmc_hostname(mmc), host);  in davinci_mmcsd_probe()
1320 				       mmc_hostname(mmc), host);  in davinci_mmcsd_probe()
1322 			mmc->caps |= MMC_CAP_SDIO_IRQ;  in davinci_mmcsd_probe()
1325 	rename_region(mem, mmc_hostname(mmc));  in davinci_mmcsd_probe()
1327 	dev_info(mmc_dev(host->mmc), "Using %s, %d-bit mode\n",  in davinci_mmcsd_probe()
1329 		(mmc->caps & MMC_CAP_4_BIT_DATA) ? 4 : 1);  in davinci_mmcsd_probe()
1334 	mmc_remove_host(mmc);  in davinci_mmcsd_probe()
1345 	mmc_free_host(mmc);  in davinci_mmcsd_probe()
1354 	mmc_remove_host(host->mmc);  in davinci_mmcsd_remove()
1358 	mmc_free_host(host->mmc);  in davinci_mmcsd_remove()
1411 MODULE_DESCRIPTION("MMC/SD driver for Davinci MMC controller");