15  * iProc SDHCI platform driver
24 #include "sdhci-pltfm.h"
28 	u32 caps;  member
45 	u32 val = readl(host->ioaddr + reg);  in sdhci_iproc_readl()
48 		 mmc_hostname(host->mmc), reg, val);  in sdhci_iproc_readl()
59 	if ((reg == SDHCI_TRANSFER_MODE) && iproc_host->is_cmd_shadowed) {  in sdhci_iproc_readw()
61 		val = iproc_host->shadow_cmd;  in sdhci_iproc_readw()
63 		   iproc_host->is_blk_shadowed) {  in sdhci_iproc_readw()
65 		val = iproc_host->shadow_blk;  in sdhci_iproc_readw()
83 		 mmc_hostname(host->mmc), reg, val);  in sdhci_iproc_writel()
85 	writel(val, host->ioaddr + reg);  in sdhci_iproc_writel()
87 	if (host->clock <= 400000) {  in sdhci_iproc_writel()
88 		/* Round up to micro-second four SD clock delay */  in sdhci_iproc_writel()
89 		if (host->clock)  in sdhci_iproc_writel()
90 			udelay((4 * 1000000 + host->clock - 1) / host->clock);  in sdhci_iproc_writel()
98  * writes to the same register that are within two SD-card clock cycles of
100  * register does not have this problem, which is just as well - otherwise we'd
104  * controller with 32-bit writes.  So two different 16-bit registers are
112  * Then, write the BLOCK_SIZE+BLOCK_COUNT in a single 32-bit write followed
113  * by the TRANSFER+COMMAND in another 32-bit write.
120 	u32 mask = 0xffff << word_shift;  in sdhci_iproc_writew()  local
125 		if (iproc_host->is_blk_shadowed) {  in sdhci_iproc_writew()
126 			sdhci_iproc_writel(host, iproc_host->shadow_blk,  in sdhci_iproc_writew()
128 			iproc_host->is_blk_shadowed = false;  in sdhci_iproc_writew()
130 		oldval = iproc_host->shadow_cmd;  in sdhci_iproc_writew()
131 		iproc_host->is_cmd_shadowed = false;  in sdhci_iproc_writew()
133 		   iproc_host->is_blk_shadowed) {  in sdhci_iproc_writew()
135 		oldval = iproc_host->shadow_blk;  in sdhci_iproc_writew()
140 	newval = (oldval & ~mask) | (val << word_shift);  in sdhci_iproc_writew()
144 		iproc_host->shadow_cmd = newval;  in sdhci_iproc_writew()
145 		iproc_host->is_cmd_shadowed = true;  in sdhci_iproc_writew()
148 		iproc_host->shadow_blk = newval;  in sdhci_iproc_writew()
149 		iproc_host->is_blk_shadowed = true;  in sdhci_iproc_writew()
151 		/* Command or other regular 32-bit write */  in sdhci_iproc_writew()
160 	u32 mask = 0xff << byte_shift;  in sdhci_iproc_writeb()  local
161 	u32 newval = (oldval & ~mask) | (val << byte_shift);  in sdhci_iproc_writeb()
170 	if (pltfm_host->clk)  in sdhci_iproc_get_max_clock()
173 		return pltfm_host->clock;  in sdhci_iproc_get_max_clock()
177  * There is a known bug on BCM2711's SDHCI core integration where the
182  *  - No SD card plugged in, polling thread is running, probing cards at
184  *  - BCM2711's core clock configured at 500MHz or more
224 	.caps = ((0x1 << SDHCI_MAX_BLOCK_SHIFT)
248 	.caps = ((0x1 << SDHCI_MAX_BLOCK_SHIFT)
272 	.caps = ((0x1 << SDHCI_MAX_BLOCK_SHIFT)
308 	{ .compatible = "brcm,bcm2835-sdhci", .data = &bcm2835_data },
309 	{ .compatible = "brcm,bcm2711-emmc2", .data = &bcm2711_data },
310 	{ .compatible = "brcm,sdhci-iproc-cygnus", .data = &iproc_cygnus_data},
311 	{ .compatible = "brcm,sdhci-iproc", .data = &iproc_data },
318  * This is a duplicate of bcm2835_(pltfrm_)data without caps quirks
345 	struct device *dev = &pdev->dev;  in sdhci_iproc_probe()
354 		return -ENODEV;  in sdhci_iproc_probe()
356 	host = sdhci_pltfm_init(pdev, iproc_data->pdata, sizeof(*iproc_host));  in sdhci_iproc_probe()
363 	iproc_host->data = iproc_data;  in sdhci_iproc_probe()
365 	ret = mmc_of_parse(host->mmc);  in sdhci_iproc_probe()
371 	host->mmc->caps |= iproc_host->data->mmc_caps;  in sdhci_iproc_probe()
373 	if (dev->of_node) {  in sdhci_iproc_probe()
374 		pltfm_host->clk = devm_clk_get(dev, NULL);  in sdhci_iproc_probe()
375 		if (IS_ERR(pltfm_host->clk)) {  in sdhci_iproc_probe()
376 			ret = PTR_ERR(pltfm_host->clk);  in sdhci_iproc_probe()
379 		ret = clk_prepare_enable(pltfm_host->clk);  in sdhci_iproc_probe()
386 	if (iproc_host->data->pdata->quirks & SDHCI_QUIRK_MISSING_CAPS) {  in sdhci_iproc_probe()
387 		host->caps = iproc_host->data->caps;  in sdhci_iproc_probe()
388 		host->caps1 = iproc_host->data->caps1;  in sdhci_iproc_probe()
398 	if (dev->of_node)  in sdhci_iproc_probe()
399 		clk_disable_unprepare(pltfm_host->clk);  in sdhci_iproc_probe()
407 		.name = "sdhci-iproc",
419 MODULE_DESCRIPTION("IPROC SDHCI driver");