From 80872e21b0263f016f2edb7b72dd8be5636d7ca7 Mon Sep 17 00:00:00 2001 From: Wolfram Sang Date: Fri, 15 Oct 2010 12:21:03 +0200 Subject: mmc: sdhci-of-esdhc: factor out common stuff MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Put everything which can be shared between the OF and platform version of this driver into a local .h file. Signed-off-by: Wolfram Sang Tested-by: Eric Bénard [cjb: fix compile error: sdhci-esdhc.c->sdhci-esdhc.h] Signed-off-by: Chris Ball --- drivers/mmc/host/sdhci-esdhc.h | 83 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 83 insertions(+) create mode 100644 drivers/mmc/host/sdhci-esdhc.h (limited to 'drivers/mmc/host/sdhci-esdhc.h') diff --git a/drivers/mmc/host/sdhci-esdhc.h b/drivers/mmc/host/sdhci-esdhc.h new file mode 100644 index 0000000..afaf1bc --- /dev/null +++ b/drivers/mmc/host/sdhci-esdhc.h @@ -0,0 +1,83 @@ +/* + * Freescale eSDHC controller driver generics for OF and pltfm. + * + * Copyright (c) 2007 Freescale Semiconductor, Inc. + * Copyright (c) 2009 MontaVista Software, Inc. + * Copyright (c) 2010 Pengutronix e.K. + * Author: Wolfram Sang + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License. + */ + +#ifndef _DRIVERS_MMC_SDHCI_ESDHC_H +#define _DRIVERS_MMC_SDHCI_ESDHC_H + +/* + * Ops and quirks for the Freescale eSDHC controller. + */ + +#define ESDHC_DEFAULT_QUIRKS (SDHCI_QUIRK_FORCE_BLK_SZ_2048 | \ + SDHCI_QUIRK_BROKEN_CARD_DETECTION | \ + SDHCI_QUIRK_NO_BUSY_IRQ | \ + SDHCI_QUIRK_NONSTANDARD_CLOCK | \ + SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK | \ + SDHCI_QUIRK_PIO_NEEDS_DELAY | \ + SDHCI_QUIRK_RESTORE_IRQS_AFTER_RESET | \ + SDHCI_QUIRK_NO_CARD_NO_RESET) + +#define ESDHC_SYSTEM_CONTROL 0x2c +#define ESDHC_CLOCK_MASK 0x0000fff0 +#define ESDHC_PREDIV_SHIFT 8 +#define ESDHC_DIVIDER_SHIFT 4 +#define ESDHC_CLOCK_PEREN 0x00000004 +#define ESDHC_CLOCK_HCKEN 0x00000002 +#define ESDHC_CLOCK_IPGEN 0x00000001 + +/* pltfm-specific */ +#define ESDHC_HOST_CONTROL_LE 0x20 + +/* OF-specific */ +#define ESDHC_DMA_SYSCTL 0x40c +#define ESDHC_DMA_SNOOP 0x00000040 + +#define ESDHC_HOST_CONTROL_RES 0x05 + +static inline void esdhc_set_clock(struct sdhci_host *host, unsigned int clock) +{ + int pre_div = 2; + int div = 1; + u32 temp; + + temp = sdhci_readl(host, ESDHC_SYSTEM_CONTROL); + temp &= ~(ESDHC_CLOCK_IPGEN | ESDHC_CLOCK_HCKEN | ESDHC_CLOCK_PEREN + | ESDHC_CLOCK_MASK); + sdhci_writel(host, temp, ESDHC_SYSTEM_CONTROL); + + if (clock == 0) + goto out; + + while (host->max_clk / pre_div / 16 > clock && pre_div < 256) + pre_div *= 2; + + while (host->max_clk / pre_div / div > clock && div < 16) + div++; + + dev_dbg(mmc_dev(host->mmc), "desired SD clock: %d, actual: %d\n", + clock, host->max_clk / pre_div / div); + + pre_div >>= 1; + div--; + + temp = sdhci_readl(host, ESDHC_SYSTEM_CONTROL); + temp |= (ESDHC_CLOCK_IPGEN | ESDHC_CLOCK_HCKEN | ESDHC_CLOCK_PEREN + | (div << ESDHC_DIVIDER_SHIFT) + | (pre_div << ESDHC_PREDIV_SHIFT)); + sdhci_writel(host, temp, ESDHC_SYSTEM_CONTROL); + mdelay(100); +out: + host->clock = clock; +} + +#endif /* _DRIVERS_MMC_SDHCI_ESDHC_H */ -- cgit v1.1