drivers/mmc/bcm2835_sdhci.c

3  * git://github.com/gonzoua/u-boot-pi.git master
6  * Tweaks for U-Boot upstreaming
9  * Portions (e.g. read/write macros, concepts for back-to-back register write
11  * https://github.com/raspberrypi/linux.git rpi-3.6.y
17  * Based on sdhci-bcm2708.c (c) 2010 Broadcom
34  * SDHCI platform device - Arasan SD controller in BCM2708
36  * Inspired by sdhci-pci.c, by Pierre Ossman
45 #include <asm/arch/mbox.h>
76 	 * successive writes to registers that are within two SD-card clock  in bcm2835_sdhci_raw_writel()
79 	 * (Which is just as well - otherwise we'd have to nobble the DMA engine  in bcm2835_sdhci_raw_writel()
83 		while (timer_get_us() - bcm_host->last_write <  in bcm2835_sdhci_raw_writel()
84 		       bcm_host->twoticks_delay)  in bcm2835_sdhci_raw_writel()
88 	writel(val, host->ioaddr + reg);  in bcm2835_sdhci_raw_writel()
89 	bcm_host->last_write = timer_get_us();  in bcm2835_sdhci_raw_writel()
94 	return readl(host->ioaddr + reg);  in bcm2835_sdhci_raw_readl()
169 	return sdhci_bind(dev, &plat->mmc, &plat->cfg);  in bcm2835_sdhci_bind()
177 	struct sdhci_host *host = &priv->host;  in bcm2835_sdhci_probe()
184 		return -EINVAL;  in bcm2835_sdhci_probe()
206 	priv->twoticks_delay = ((2 * 1000000) / MIN_FREQ) + 1;  in bcm2835_sdhci_probe()
207 	priv->last_write = 0;  in bcm2835_sdhci_probe()
209 	host->name = dev->name;  in bcm2835_sdhci_probe()
210 	host->ioaddr = (void *)base;  in bcm2835_sdhci_probe()
211 	host->quirks = SDHCI_QUIRK_BROKEN_VOLTAGE | SDHCI_QUIRK_BROKEN_R1B |  in bcm2835_sdhci_probe()
213 	host->max_clk = emmc_freq;  in bcm2835_sdhci_probe()
214 	host->voltages = MMC_VDD_32_33 | MMC_VDD_33_34 | MMC_VDD_165_195;  in bcm2835_sdhci_probe()
215 	host->ops = &bcm2835_ops;  in bcm2835_sdhci_probe()
217 	ret = sdhci_setup_cfg(&plat->cfg, host, emmc_freq, MIN_FREQ);  in bcm2835_sdhci_probe()
223 	upriv->mmc = &plat->mmc;  in bcm2835_sdhci_probe()
224 	host->mmc = &plat->mmc;  in bcm2835_sdhci_probe()
225 	host->mmc->priv = host;  in bcm2835_sdhci_probe()
231 	{ .compatible = "brcm,bcm2835-sdhci" },
236 	.name = "sdhci-bcm2835",