1 // SPDX-License-Identifier: GPL-2.0-or-later
3  *  Toshiba PCI Secure Digital Host Controller Interface driver
9  *	sdhci.c, copyright (C) 2005-2006 Pierre Ossman
21 #include <linux/mmc/host.h>
22 #include <linux/mmc/mmc.h>
35 static void toshsd_init(struct toshsd_host *host)  in toshsd_init()  argument
38 	pci_write_config_byte(host->pdev, SD_PCICFG_CLKSTOP,  in toshsd_init()
40 	pci_write_config_byte(host->pdev, SD_PCICFG_CARDDETECT, 2);  in toshsd_init()
43 	iowrite16(0, host->ioaddr + SD_SOFTWARERESET); /* assert */  in toshsd_init()
45 	iowrite16(1, host->ioaddr + SD_SOFTWARERESET); /* deassert */  in toshsd_init()
49 	iowrite16(0, host->ioaddr + SD_CARDCLOCKCTRL);  in toshsd_init()
50 	iowrite32(0, host->ioaddr + SD_CARDSTATUS);  in toshsd_init()
51 	iowrite32(0, host->ioaddr + SD_ERRORSTATUS0);  in toshsd_init()
52 	iowrite16(0, host->ioaddr + SD_STOPINTERNAL);  in toshsd_init()
55 	iowrite16(0x100, host->ioaddr + SDIO_BASE + SDIO_CLOCKNWAITCTRL);  in toshsd_init()
58 	pci_write_config_byte(host->pdev, SD_PCICFG_SDLED_ENABLE1,  in toshsd_init()
60 	pci_write_config_byte(host->pdev, SD_PCICFG_SDLED_ENABLE2,  in toshsd_init()
68 			host->ioaddr + SD_INTMASKCARD);  in toshsd_init()
70 	iowrite16(0x1000, host->ioaddr + SD_TRANSACTIONCTRL);  in toshsd_init()
73 /* Set MMC clock / power.
75  * SD/MMC cards at full speed (24/20MHz). HCLK (=33MHz PCI clock?) is too high
78 static void __toshsd_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)  in __toshsd_set_ios()  argument
80 	struct toshsd_host *host = mmc_priv(mmc);  in __toshsd_set_ios()  local
82 	if (ios->clock) {  in __toshsd_set_ios()
86 		while (ios->clock < HCLK / div)  in __toshsd_set_ios()
92 			pci_write_config_byte(host->pdev, SD_PCICFG_CLKMODE,  in __toshsd_set_ios()
96 			pci_write_config_byte(host->pdev, SD_PCICFG_CLKMODE, 0);  in __toshsd_set_ios()
99 		iowrite16(clk, host->ioaddr + SD_CARDCLOCKCTRL);  in __toshsd_set_ios()
103 		iowrite16(0, host->ioaddr + SD_CARDCLOCKCTRL);  in __toshsd_set_ios()
105 	switch (ios->power_mode) {  in __toshsd_set_ios()
107 		pci_write_config_byte(host->pdev, SD_PCICFG_POWER1,  in __toshsd_set_ios()
114 		pci_write_config_byte(host->pdev, SD_PCICFG_POWER1,  in __toshsd_set_ios()
116 		pci_write_config_byte(host->pdev, SD_PCICFG_POWER2,  in __toshsd_set_ios()
122 	switch (ios->bus_width) {  in __toshsd_set_ios()
127 				host->ioaddr + SD_CARDOPTIONSETUP);  in __toshsd_set_ios()
133 				host->ioaddr + SD_CARDOPTIONSETUP);  in __toshsd_set_ios()
138 static void toshsd_set_led(struct toshsd_host *host, unsigned char state)  in toshsd_set_led()  argument
140 	iowrite16(state, host->ioaddr + SDIO_BASE + SDIO_LEDCTRL);  in toshsd_set_led()
143 static void toshsd_finish_request(struct toshsd_host *host)  in toshsd_finish_request()  argument
145 	struct mmc_request *mrq = host->mrq;  in toshsd_finish_request()
148 	host->mrq = NULL;  in toshsd_finish_request()
149 	host->cmd = NULL;  in toshsd_finish_request()
150 	host->data = NULL;  in toshsd_finish_request()
152 	toshsd_set_led(host, 0);  in toshsd_finish_request()
153 	mmc_request_done(host->mmc, mrq);  in toshsd_finish_request()
158 	struct toshsd_host *host = dev_id;  in toshsd_thread_irq()  local
159 	struct mmc_data *data = host->data;  in toshsd_thread_irq()
160 	struct sg_mapping_iter *sg_miter = &host->sg_miter;  in toshsd_thread_irq()
166 		dev_warn(&host->pdev->dev, "Spurious Data IRQ\n");  in toshsd_thread_irq()
167 		if (host->cmd) {  in toshsd_thread_irq()
168 			host->cmd->error = -EIO;  in toshsd_thread_irq()
169 			toshsd_finish_request(host);  in toshsd_thread_irq()
173 	spin_lock_irqsave(&host->lock, flags);  in toshsd_thread_irq()
178 	buf = sg_miter->addr;  in toshsd_thread_irq()
183 	count = sg_miter->length;  in toshsd_thread_irq()
184 	if (count > data->blksz)  in toshsd_thread_irq()
185 		count = data->blksz;  in toshsd_thread_irq()
187 	dev_dbg(&host->pdev->dev, "count: %08x, flags %08x\n", count,  in toshsd_thread_irq()
188 		data->flags);  in toshsd_thread_irq()
191 	if (data->flags & MMC_DATA_READ)  in toshsd_thread_irq()
192 		ioread32_rep(host->ioaddr + SD_DATAPORT, buf, count >> 2);  in toshsd_thread_irq()
194 		iowrite32_rep(host->ioaddr + SD_DATAPORT, buf, count >> 2);  in toshsd_thread_irq()
196 	sg_miter->consumed = count;  in toshsd_thread_irq()
200 	spin_unlock_irqrestore(&host->lock, flags);  in toshsd_thread_irq()
205 static void toshsd_cmd_irq(struct toshsd_host *host)  in toshsd_cmd_irq()  argument
207 	struct mmc_command *cmd = host->cmd;  in toshsd_cmd_irq()
211 	if (!host->cmd) {  in toshsd_cmd_irq()
212 		dev_warn(&host->pdev->dev, "Spurious CMD irq\n");  in toshsd_cmd_irq()
215 	buf = (u8 *)cmd->resp;  in toshsd_cmd_irq()
216 	host->cmd = NULL;  in toshsd_cmd_irq()
218 	if (cmd->flags & MMC_RSP_PRESENT && cmd->flags & MMC_RSP_136) {  in toshsd_cmd_irq()
221 		data = ioread16(host->ioaddr + SD_RESPONSE0);  in toshsd_cmd_irq()
224 		data = ioread16(host->ioaddr + SD_RESPONSE1);  in toshsd_cmd_irq()
227 		data = ioread16(host->ioaddr + SD_RESPONSE2);  in toshsd_cmd_irq()
230 		data = ioread16(host->ioaddr + SD_RESPONSE3);  in toshsd_cmd_irq()
233 		data = ioread16(host->ioaddr + SD_RESPONSE4);  in toshsd_cmd_irq()
236 		data = ioread16(host->ioaddr + SD_RESPONSE5);  in toshsd_cmd_irq()
239 		data = ioread16(host->ioaddr + SD_RESPONSE6);  in toshsd_cmd_irq()
242 		data = ioread16(host->ioaddr + SD_RESPONSE7);  in toshsd_cmd_irq()
244 	} else if (cmd->flags & MMC_RSP_PRESENT) {  in toshsd_cmd_irq()
246 		data = ioread16(host->ioaddr + SD_RESPONSE0);  in toshsd_cmd_irq()
249 		data = ioread16(host->ioaddr + SD_RESPONSE1);  in toshsd_cmd_irq()
254 	dev_dbg(&host->pdev->dev, "Command IRQ complete %d %d %x\n",  in toshsd_cmd_irq()
255 		cmd->opcode, cmd->error, cmd->flags);  in toshsd_cmd_irq()
259 	if (host->data)  in toshsd_cmd_irq()
262 	toshsd_finish_request(host);  in toshsd_cmd_irq()
265 static void toshsd_data_end_irq(struct toshsd_host *host)  in toshsd_data_end_irq()  argument
267 	struct mmc_data *data = host->data;  in toshsd_data_end_irq()
269 	host->data = NULL;  in toshsd_data_end_irq()
272 		dev_warn(&host->pdev->dev, "Spurious data end IRQ\n");  in toshsd_data_end_irq()
276 	if (data->error == 0)  in toshsd_data_end_irq()
277 		data->bytes_xfered = data->blocks * data->blksz;  in toshsd_data_end_irq()
279 		data->bytes_xfered = 0;  in toshsd_data_end_irq()
281 	dev_dbg(&host->pdev->dev, "Completed data request xfr=%d\n",  in toshsd_data_end_irq()
282 		data->bytes_xfered);  in toshsd_data_end_irq()
284 	iowrite16(0, host->ioaddr + SD_STOPINTERNAL);  in toshsd_data_end_irq()
286 	toshsd_finish_request(host);  in toshsd_data_end_irq()
291 	struct toshsd_host *host = dev_id;  in toshsd_irq()  local
295 	spin_lock(&host->lock);  in toshsd_irq()
296 	int_status = ioread32(host->ioaddr + SD_CARDSTATUS);  in toshsd_irq()
297 	int_mask = ioread32(host->ioaddr + SD_INTMASKCARD);  in toshsd_irq()
300 	dev_dbg(&host->pdev->dev, "IRQ status:%x mask:%x\n",  in toshsd_irq()
310 		error = -ETIMEDOUT;  in toshsd_irq()
311 		dev_dbg(&host->pdev->dev, "Timeout\n");  in toshsd_irq()
313 		error = -EILSEQ;  in toshsd_irq()
314 		dev_err(&host->pdev->dev, "BadCRC\n");  in toshsd_irq()
321 		dev_err(&host->pdev->dev, "Buffer status error: { %s%s%s%s%s%s}\n",  in toshsd_irq()
329 		detail = ioread32(host->ioaddr + SD_ERRORSTATUS0);  in toshsd_irq()
330 		dev_err(&host->pdev->dev, "detail error status { %s%s%s%s%s%s%s%s%s%s%s%s%s}\n",  in toshsd_irq()
344 		error = -EIO;  in toshsd_irq()
348 		if (host->cmd)  in toshsd_irq()
349 			host->cmd->error = error;  in toshsd_irq()
351 		if (error == -ETIMEDOUT) {  in toshsd_irq()
354 				  host->ioaddr + SD_CARDSTATUS);  in toshsd_irq()
356 			toshsd_init(host);  in toshsd_irq()
357 			__toshsd_set_ios(host->mmc, &host->mmc->ios);  in toshsd_irq()
362 	/* Card insert/remove. The mmc controlling code is stateless. */  in toshsd_irq()
366 			  host->ioaddr + SD_CARDSTATUS);  in toshsd_irq()
369 			toshsd_init(host);  in toshsd_irq()
371 		mmc_detect_change(host->mmc, 1);  in toshsd_irq()
378 			  host->ioaddr + SD_CARDSTATUS);  in toshsd_irq()
387 			  host->ioaddr + SD_CARDSTATUS);  in toshsd_irq()
388 		toshsd_cmd_irq(host);  in toshsd_irq()
394 			  host->ioaddr + SD_CARDSTATUS);  in toshsd_irq()
395 		toshsd_data_end_irq(host);  in toshsd_irq()
398 	spin_unlock(&host->lock);  in toshsd_irq()
402 static void toshsd_start_cmd(struct toshsd_host *host, struct mmc_command *cmd)  in toshsd_start_cmd()  argument
404 	struct mmc_data *data = host->data;  in toshsd_start_cmd()
405 	int c = cmd->opcode;  in toshsd_start_cmd()
407 	dev_dbg(&host->pdev->dev, "Command opcode: %d\n", cmd->opcode);  in toshsd_start_cmd()
409 	if (cmd->opcode == MMC_STOP_TRANSMISSION) {  in toshsd_start_cmd()
411 			  host->ioaddr + SD_STOPINTERNAL);  in toshsd_start_cmd()
413 		cmd->resp[0] = cmd->opcode;  in toshsd_start_cmd()
414 		cmd->resp[1] = 0;  in toshsd_start_cmd()
415 		cmd->resp[2] = 0;  in toshsd_start_cmd()
416 		cmd->resp[3] = 0;  in toshsd_start_cmd()
418 		toshsd_finish_request(host);  in toshsd_start_cmd()
441 		dev_err(&host->pdev->dev, "Unknown response type %d\n",  in toshsd_start_cmd()
446 	host->cmd = cmd;  in toshsd_start_cmd()
448 	if (cmd->opcode == MMC_APP_CMD)  in toshsd_start_cmd()
451 	if (cmd->opcode == MMC_GO_IDLE_STATE)  in toshsd_start_cmd()
452 		c |= (3 << 8);  /* removed from ipaq-asic3.h for some reason */  in toshsd_start_cmd()
457 		if (data->blocks > 1) {  in toshsd_start_cmd()
459 				  host->ioaddr + SD_STOPINTERNAL);  in toshsd_start_cmd()
463 		if (data->flags & MMC_DATA_READ)  in toshsd_start_cmd()
470 	iowrite32(cmd->arg, host->ioaddr + SD_ARG0);  in toshsd_start_cmd()
471 	iowrite16(c, host->ioaddr + SD_CMD);  in toshsd_start_cmd()
474 static void toshsd_start_data(struct toshsd_host *host, struct mmc_data *data)  in toshsd_start_data()  argument
478 	dev_dbg(&host->pdev->dev, "setup data transfer: blocksize %08x  nr_blocks %d, offset: %08x\n",  in toshsd_start_data()
479 		data->blksz, data->blocks, data->sg->offset);  in toshsd_start_data()
481 	host->data = data;  in toshsd_start_data()
483 	if (data->flags & MMC_DATA_READ)  in toshsd_start_data()
488 	sg_miter_start(&host->sg_miter, data->sg, data->sg_len, flags);  in toshsd_start_data()
491 	iowrite16(data->blocks, host->ioaddr + SD_BLOCKCOUNT);  in toshsd_start_data()
492 	iowrite16(data->blksz, host->ioaddr + SD_CARDXFERDATALEN);  in toshsd_start_data()
495 /* Process requests from the MMC layer */
496 static void toshsd_request(struct mmc_host *mmc, struct mmc_request *mrq)  in toshsd_request()  argument
498 	struct toshsd_host *host = mmc_priv(mmc);  in toshsd_request()  local
502 	if (!(ioread16(host->ioaddr + SD_CARDSTATUS) & SD_CARD_PRESENT_0)) {  in toshsd_request()
503 		mrq->cmd->error = -ENOMEDIUM;  in toshsd_request()
504 		mmc_request_done(mmc, mrq);  in toshsd_request()
508 	spin_lock_irqsave(&host->lock, flags);  in toshsd_request()
510 	WARN_ON(host->mrq != NULL);  in toshsd_request()
512 	host->mrq = mrq;  in toshsd_request()
514 	if (mrq->data)  in toshsd_request()
515 		toshsd_start_data(host, mrq->data);  in toshsd_request()
517 	toshsd_set_led(host, 1);  in toshsd_request()
519 	toshsd_start_cmd(host, mrq->cmd);  in toshsd_request()
521 	spin_unlock_irqrestore(&host->lock, flags);  in toshsd_request()
524 static void toshsd_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)  in toshsd_set_ios()  argument
526 	struct toshsd_host *host = mmc_priv(mmc);  in toshsd_set_ios()  local
529 	spin_lock_irqsave(&host->lock, flags);  in toshsd_set_ios()
530 	__toshsd_set_ios(mmc, ios);  in toshsd_set_ios()
531 	spin_unlock_irqrestore(&host->lock, flags);  in toshsd_set_ios()
534 static int toshsd_get_ro(struct mmc_host *mmc)  in toshsd_get_ro()  argument
536 	struct toshsd_host *host = mmc_priv(mmc);  in toshsd_get_ro()  local
539 	return !(ioread16(host->ioaddr + SD_CARDSTATUS) & SD_CARD_WRITE_PROTECT);  in toshsd_get_ro()
542 static int toshsd_get_cd(struct mmc_host *mmc)  in toshsd_get_cd()  argument
544 	struct toshsd_host *host = mmc_priv(mmc);  in toshsd_get_cd()  local
546 	return !!(ioread16(host->ioaddr + SD_CARDSTATUS) & SD_CARD_PRESENT_0);  in toshsd_get_cd()
557 static void toshsd_powerdown(struct toshsd_host *host)  in toshsd_powerdown()  argument
560 	iowrite32(0xffffffff, host->ioaddr + SD_INTMASKCARD);  in toshsd_powerdown()
562 	iowrite16(0x000, host->ioaddr + SDIO_BASE + SDIO_CLOCKNWAITCTRL);  in toshsd_powerdown()
563 	iowrite16(0, host->ioaddr + SD_CARDCLOCKCTRL);  in toshsd_powerdown()
565 	pci_write_config_byte(host->pdev, SD_PCICFG_POWER1, SD_PCICFG_PWR1_OFF);  in toshsd_powerdown()
567 	pci_write_config_byte(host->pdev, SD_PCICFG_CLKSTOP, 0);  in toshsd_powerdown()
574 	struct toshsd_host *host = pci_get_drvdata(pdev);  in toshsd_pm_suspend()  local
576 	toshsd_powerdown(host);  in toshsd_pm_suspend()
589 	struct toshsd_host *host = pci_get_drvdata(pdev);  in toshsd_pm_resume()  local
598 	toshsd_init(host);  in toshsd_pm_resume()
607 	struct toshsd_host *host;  in toshsd_probe()  local
608 	struct mmc_host *mmc;  in toshsd_probe()  local
615 	mmc = mmc_alloc_host(sizeof(struct toshsd_host), &pdev->dev);  in toshsd_probe()
616 	if (!mmc) {  in toshsd_probe()
617 		ret = -ENOMEM;  in toshsd_probe()
621 	host = mmc_priv(mmc);  in toshsd_probe()
622 	host->mmc = mmc;  in toshsd_probe()
624 	host->pdev = pdev;  in toshsd_probe()
625 	pci_set_drvdata(pdev, host);  in toshsd_probe()
631 	host->ioaddr = pci_iomap(pdev, 0, 0);  in toshsd_probe()
632 	if (!host->ioaddr) {  in toshsd_probe()
633 		ret = -ENOMEM;  in toshsd_probe()
637 	/* Set MMC host parameters */  in toshsd_probe()
638 	mmc->ops = &toshsd_ops;  in toshsd_probe()
639 	mmc->caps = MMC_CAP_4_BIT_DATA;  in toshsd_probe()
640 	mmc->ocr_avail = MMC_VDD_32_33;  in toshsd_probe()
642 	mmc->f_min = HCLK / 512;  in toshsd_probe()
643 	mmc->f_max = HCLK;  in toshsd_probe()
645 	spin_lock_init(&host->lock);  in toshsd_probe()
647 	toshsd_init(host);  in toshsd_probe()
649 	ret = request_threaded_irq(pdev->irq, toshsd_irq, toshsd_thread_irq,  in toshsd_probe()
650 				   IRQF_SHARED, DRIVER_NAME, host);  in toshsd_probe()
654 	ret = mmc_add_host(mmc);  in toshsd_probe()
659 	dev_dbg(&pdev->dev, "MMIO %pa, IRQ %d\n", &base, pdev->irq);  in toshsd_probe()
661 	pm_suspend_ignore_children(&pdev->dev, 1);  in toshsd_probe()
666 	free_irq(pdev->irq, host);  in toshsd_probe()
668 	pci_iounmap(pdev, host->ioaddr);  in toshsd_probe()
672 	mmc_free_host(mmc);  in toshsd_probe()
681 	struct toshsd_host *host = pci_get_drvdata(pdev);  in toshsd_remove()  local
683 	mmc_remove_host(host->mmc);  in toshsd_remove()
684 	toshsd_powerdown(host);  in toshsd_remove()
685 	free_irq(pdev->irq, host);  in toshsd_remove()
686 	pci_iounmap(pdev, host->ioaddr);  in toshsd_remove()
688 	mmc_free_host(host->mmc);  in toshsd_remove()
708 MODULE_DESCRIPTION("Toshiba PCI Secure Digital Host Controller Interface driver");