mmc: sdhci: split up sdhci.h for sdhci-pltfm users

Some platforms based on sdhci-pltfm need to set their own quirks.
Previously to this patch, the quirks were in drivers/mmc/host/sdhci.h.

This patch splits drivers/mmc/host/sdhci.h into two parts:

* drivers/mmc/host/sdhci.h  includes the HC registers and I/O accessors.
* include/linux/mmc/sdhci.h includes the sdhci structure and quirks.

Instead of including drivers/mmc/host/sdhci.h, -pltfm drivers should
now include include/linux/mmc/sdhci.h and include/linux/sdhci-pltfm.h.

This patch avoids adding/changing the calls/flags in the
sdhci_pltfm_data structure.  It has been tested on STM platforms
(e.g. STx7106, STx7108, STx5206) where the driver is configured
and used as shown in the example below:

[snip]
static int mmc_pad_resources(struct sdhci_host *sdhci)
{
	if (!devm_stm_pad_claim(sdhci->mmc->parent,
				&stx7108_mmc_pad_config,
				dev_name(sdhci->mmc->parent)))
		return -ENODEV;

	return 0;
}

static struct sdhci_pltfm_data stx7108_mmc_platform_data = {
	.init = mmc_pad_resources,
	.quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
};

static struct platform_device stx7108_mmc_device = {
	.name = "sdhci",
[snip]

Note: drivers/mmc/host/sdhci.h now also includes linux/mmc/sdhci.h,
and no modifications should be needed on other sdhci-<XXX> drivers.

Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Reviewed-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Chris Ball <cjb@laptop.org>

1 files changed, 7 insertions, 131 deletions

diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
index 112543ae36c9..410ee8aa04d4 100644
--- a/drivers/mmc/host/sdhci.h
+++ b/drivers/mmc/host/sdhci.h
@@ -1,6 +1,8 @@
 /*
  *  linux/drivers/mmc/host/sdhci.h - Secure Digital Host Controller Interface driver
  *
+ * Header file for Host Controller registers and I/O accessors.
+ *
  *  Copyright (C) 2005-2008 Pierre Ossman, All Rights Reserved.
  *
  * This program is free software; you can redistribute it and/or modify
@@ -8,14 +10,16 @@
  * the Free Software Foundation; either version 2 of the License, or (at
  * your option) any later version.
  */
-#ifndef __SDHCI_H
-#define __SDHCI_H
+#ifndef __SDHCI_HW_H
+#define __SDHCI_HW_H
 
 #include <linux/scatterlist.h>
 #include <linux/compiler.h>
 #include <linux/types.h>
 #include <linux/io.h>
 
+#include <linux/mmc/sdhci.h>
+
 /*
  * Controller registers
  */
@@ -192,134 +196,6 @@
 #define SDHCI_MAX_DIV_SPEC_200  256
 #define SDHCI_MAX_DIV_SPEC_300  2046
 
-struct sdhci_ops;
-
-struct sdhci_host {
-        /* Data set by hardware interface driver */
-        const char              *hw_name;       /* Hardware bus name */
-
-        unsigned int            quirks;         /* Deviations from spec. */
-
-/* Controller doesn't honor resets unless we touch the clock register */
-#define SDHCI_QUIRK_CLOCK_BEFORE_RESET                  (1<<0)
-/* Controller has bad caps bits, but really supports DMA */
-#define SDHCI_QUIRK_FORCE_DMA                           (1<<1)
-/* Controller doesn't like to be reset when there is no card inserted. */
-#define SDHCI_QUIRK_NO_CARD_NO_RESET                    (1<<2)
-/* Controller doesn't like clearing the power reg before a change */
-#define SDHCI_QUIRK_SINGLE_POWER_WRITE                  (1<<3)
-/* Controller has flaky internal state so reset it on each ios change */
-#define SDHCI_QUIRK_RESET_CMD_DATA_ON_IOS               (1<<4)
-/* Controller has an unusable DMA engine */
-#define SDHCI_QUIRK_BROKEN_DMA                          (1<<5)
-/* Controller has an unusable ADMA engine */
-#define SDHCI_QUIRK_BROKEN_ADMA                         (1<<6)
-/* Controller can only DMA from 32-bit aligned addresses */
-#define SDHCI_QUIRK_32BIT_DMA_ADDR                      (1<<7)
-/* Controller can only DMA chunk sizes that are a multiple of 32 bits */
-#define SDHCI_QUIRK_32BIT_DMA_SIZE                      (1<<8)
-/* Controller can only ADMA chunks that are a multiple of 32 bits */
-#define SDHCI_QUIRK_32BIT_ADMA_SIZE                     (1<<9)
-/* Controller needs to be reset after each request to stay stable */
-#define SDHCI_QUIRK_RESET_AFTER_REQUEST                 (1<<10)
-/* Controller needs voltage and power writes to happen separately */
-#define SDHCI_QUIRK_NO_SIMULT_VDD_AND_POWER             (1<<11)
-/* Controller provides an incorrect timeout value for transfers */
-#define SDHCI_QUIRK_BROKEN_TIMEOUT_VAL                  (1<<12)
-/* Controller has an issue with buffer bits for small transfers */
-#define SDHCI_QUIRK_BROKEN_SMALL_PIO                    (1<<13)
-/* Controller does not provide transfer-complete interrupt when not busy */
-#define SDHCI_QUIRK_NO_BUSY_IRQ                         (1<<14)
-/* Controller has unreliable card detection */
-#define SDHCI_QUIRK_BROKEN_CARD_DETECTION               (1<<15)
-/* Controller reports inverted write-protect state */
-#define SDHCI_QUIRK_INVERTED_WRITE_PROTECT              (1<<16)
-/* Controller has nonstandard clock management */
-#define SDHCI_QUIRK_NONSTANDARD_CLOCK                   (1<<17)
-/* Controller does not like fast PIO transfers */
-#define SDHCI_QUIRK_PIO_NEEDS_DELAY                     (1<<18)
-/* Controller losing signal/interrupt enable states after reset */
-#define SDHCI_QUIRK_RESTORE_IRQS_AFTER_RESET            (1<<19)
-/* Controller has to be forced to use block size of 2048 bytes */
-#define SDHCI_QUIRK_FORCE_BLK_SZ_2048                   (1<<20)
-/* Controller cannot do multi-block transfers */
-#define SDHCI_QUIRK_NO_MULTIBLOCK                       (1<<21)
-/* Controller can only handle 1-bit data transfers */
-#define SDHCI_QUIRK_FORCE_1_BIT_DATA                    (1<<22)
-/* Controller needs 10ms delay between applying power and clock */
-#define SDHCI_QUIRK_DELAY_AFTER_POWER                   (1<<23)
-/* Controller uses SDCLK instead of TMCLK for data timeouts */
-#define SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK             (1<<24)
-/* Controller reports wrong base clock capability */
-#define SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN               (1<<25)
-/* Controller cannot support End Attribute in NOP ADMA descriptor */
-#define SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC               (1<<26)
-/* Controller is missing device caps. Use caps provided by host */
-#define SDHCI_QUIRK_MISSING_CAPS                        (1<<27)
-/* Controller uses Auto CMD12 command to stop the transfer */
-#define SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12              (1<<28)
-/* Controller doesn't have HISPD bit field in HI-SPEED SD card */
-#define SDHCI_QUIRK_NO_HISPD_BIT                        (1<<29)
-
-        int                     irq;            /* Device IRQ */
-        void __iomem *          ioaddr;         /* Mapped address */
-
-        const struct sdhci_ops  *ops;           /* Low level hw interface */
-
-        struct regulator        *vmmc;          /* Power regulator */
-
-        /* Internal data */
-        struct mmc_host         *mmc;           /* MMC structure */
-        u64                     dma_mask;       /* custom DMA mask */
-
-#if defined(CONFIG_LEDS_CLASS) || defined(CONFIG_LEDS_CLASS_MODULE)
-        struct led_classdev     led;            /* LED control */
-        char   led_name[32];
-#endif
-
-        spinlock_t              lock;           /* Mutex */
-
-        int                     flags;          /* Host attributes */
-#define SDHCI_USE_SDMA          (1<<0)          /* Host is SDMA capable */
-#define SDHCI_USE_ADMA          (1<<1)          /* Host is ADMA capable */
-#define SDHCI_REQ_USE_DMA       (1<<2)          /* Use DMA for this req. */
-#define SDHCI_DEVICE_DEAD       (1<<3)          /* Device unresponsive */
-
-        unsigned int            version;        /* SDHCI spec. version */
-
-        unsigned int            max_clk;        /* Max possible freq (MHz) */
-        unsigned int            timeout_clk;    /* Timeout freq (KHz) */
-
-        unsigned int            clock;          /* Current clock (MHz) */
-        u8                      pwr;            /* Current voltage */
-
-        struct mmc_request      *mrq;           /* Current request */
-        struct mmc_command      *cmd;           /* Current command */
-        struct mmc_data         *data;          /* Current data request */
-        unsigned int            data_early:1;   /* Data finished before cmd */
-
-        struct sg_mapping_iter  sg_miter;       /* SG state for PIO */
-        unsigned int            blocks;         /* remaining PIO blocks */
-
-        int                     sg_count;       /* Mapped sg entries */
-
-        u8                      *adma_desc;     /* ADMA descriptor table */
-        u8                      *align_buffer;  /* Bounce buffer */
-
-        dma_addr_t              adma_addr;      /* Mapped ADMA descr. table */
-        dma_addr_t              align_addr;     /* Mapped bounce buffer */
-
-        struct tasklet_struct   card_tasklet;   /* Tasklet structures */
-        struct tasklet_struct   finish_tasklet;
-
-        struct timer_list       timer;          /* Timer for timeouts */
-
-        unsigned int            caps;           /* Alternative capabilities */
-
-        unsigned long           private[0] ____cacheline_aligned;
-};
-
-
 struct sdhci_ops {
 #ifdef CONFIG_MMC_SDHCI_IO_ACCESSORS
         u32             (*read_l)(struct sdhci_host *host, int reg);
@@ -440,4 +316,4 @@ extern int sdhci_suspend_host(struct sdhci_host *host, pm_message_t state);
 extern int sdhci_resume_host(struct sdhci_host *host);
 #endif
 
-#endif /* __SDHCI_H */
+#endif /* __SDHCI_HW_H */