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On the U300 the MCI_DATAEND and MCI_DATABLOCKEND IRQs can arrive out-of-order. Replace an ugly #ifdef hack with a proper runtime solution which models what is really happening. In the U300 DMA mode and on all Ux500 models, the MCI_DATABLOCKEND flag isn't properly cleared in hardware following and ACK leading to all kind of weird behaviour when the flag is still up in subsequent interrupts, so we add two flags indicating the error and handle this runtime. Cc: Rabin Vincent <rabin.vincent@stericsson.com> Signed-off-by: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
189 lines
5.4 KiB
C
189 lines
5.4 KiB
C
/*
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* linux/drivers/mmc/host/mmci.h - ARM PrimeCell MMCI PL180/1 driver
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*
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* Copyright (C) 2003 Deep Blue Solutions, Ltd, All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#define MMCIPOWER 0x000
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#define MCI_PWR_OFF 0x00
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#define MCI_PWR_UP 0x02
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#define MCI_PWR_ON 0x03
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#define MCI_DATA2DIREN (1 << 2)
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#define MCI_CMDDIREN (1 << 3)
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#define MCI_DATA0DIREN (1 << 4)
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#define MCI_DATA31DIREN (1 << 5)
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#define MCI_OD (1 << 6)
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#define MCI_ROD (1 << 7)
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/* The ST Micro version does not have ROD */
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#define MCI_FBCLKEN (1 << 7)
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#define MCI_DATA74DIREN (1 << 8)
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#define MMCICLOCK 0x004
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#define MCI_CLK_ENABLE (1 << 8)
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#define MCI_CLK_PWRSAVE (1 << 9)
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#define MCI_CLK_BYPASS (1 << 10)
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#define MCI_4BIT_BUS (1 << 11)
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/* 8bit wide buses supported in ST Micro versions */
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#define MCI_ST_8BIT_BUS (1 << 12)
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#define MMCIARGUMENT 0x008
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#define MMCICOMMAND 0x00c
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#define MCI_CPSM_RESPONSE (1 << 6)
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#define MCI_CPSM_LONGRSP (1 << 7)
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#define MCI_CPSM_INTERRUPT (1 << 8)
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#define MCI_CPSM_PENDING (1 << 9)
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#define MCI_CPSM_ENABLE (1 << 10)
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#define MCI_SDIO_SUSP (1 << 11)
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#define MCI_ENCMD_COMPL (1 << 12)
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#define MCI_NIEN (1 << 13)
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#define MCI_CE_ATACMD (1 << 14)
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#define MMCIRESPCMD 0x010
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#define MMCIRESPONSE0 0x014
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#define MMCIRESPONSE1 0x018
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#define MMCIRESPONSE2 0x01c
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#define MMCIRESPONSE3 0x020
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#define MMCIDATATIMER 0x024
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#define MMCIDATALENGTH 0x028
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#define MMCIDATACTRL 0x02c
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#define MCI_DPSM_ENABLE (1 << 0)
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#define MCI_DPSM_DIRECTION (1 << 1)
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#define MCI_DPSM_MODE (1 << 2)
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#define MCI_DPSM_DMAENABLE (1 << 3)
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#define MCI_DPSM_BLOCKSIZE (1 << 4)
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/* Control register extensions in the ST Micro U300 and Ux500 versions */
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#define MCI_ST_DPSM_RWSTART (1 << 8)
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#define MCI_ST_DPSM_RWSTOP (1 << 9)
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#define MCI_ST_DPSM_RWMOD (1 << 10)
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#define MCI_ST_DPSM_SDIOEN (1 << 11)
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/* Control register extensions in the ST Micro Ux500 versions */
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#define MCI_ST_DPSM_DMAREQCTL (1 << 12)
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#define MCI_ST_DPSM_DBOOTMODEEN (1 << 13)
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#define MCI_ST_DPSM_BUSYMODE (1 << 14)
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#define MCI_ST_DPSM_DDRMODE (1 << 15)
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#define MMCIDATACNT 0x030
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#define MMCISTATUS 0x034
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#define MCI_CMDCRCFAIL (1 << 0)
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#define MCI_DATACRCFAIL (1 << 1)
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#define MCI_CMDTIMEOUT (1 << 2)
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#define MCI_DATATIMEOUT (1 << 3)
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#define MCI_TXUNDERRUN (1 << 4)
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#define MCI_RXOVERRUN (1 << 5)
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#define MCI_CMDRESPEND (1 << 6)
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#define MCI_CMDSENT (1 << 7)
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#define MCI_DATAEND (1 << 8)
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#define MCI_DATABLOCKEND (1 << 10)
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#define MCI_CMDACTIVE (1 << 11)
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#define MCI_TXACTIVE (1 << 12)
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#define MCI_RXACTIVE (1 << 13)
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#define MCI_TXFIFOHALFEMPTY (1 << 14)
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#define MCI_RXFIFOHALFFULL (1 << 15)
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#define MCI_TXFIFOFULL (1 << 16)
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#define MCI_RXFIFOFULL (1 << 17)
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#define MCI_TXFIFOEMPTY (1 << 18)
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#define MCI_RXFIFOEMPTY (1 << 19)
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#define MCI_TXDATAAVLBL (1 << 20)
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#define MCI_RXDATAAVLBL (1 << 21)
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#define MCI_SDIOIT (1 << 22)
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#define MCI_CEATAEND (1 << 23)
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#define MMCICLEAR 0x038
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#define MCI_CMDCRCFAILCLR (1 << 0)
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#define MCI_DATACRCFAILCLR (1 << 1)
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#define MCI_CMDTIMEOUTCLR (1 << 2)
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#define MCI_DATATIMEOUTCLR (1 << 3)
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#define MCI_TXUNDERRUNCLR (1 << 4)
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#define MCI_RXOVERRUNCLR (1 << 5)
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#define MCI_CMDRESPENDCLR (1 << 6)
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#define MCI_CMDSENTCLR (1 << 7)
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#define MCI_DATAENDCLR (1 << 8)
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#define MCI_DATABLOCKENDCLR (1 << 10)
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#define MCI_SDIOITC (1 << 22)
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#define MCI_CEATAENDC (1 << 23)
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#define MMCIMASK0 0x03c
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#define MCI_CMDCRCFAILMASK (1 << 0)
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#define MCI_DATACRCFAILMASK (1 << 1)
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#define MCI_CMDTIMEOUTMASK (1 << 2)
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#define MCI_DATATIMEOUTMASK (1 << 3)
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#define MCI_TXUNDERRUNMASK (1 << 4)
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#define MCI_RXOVERRUNMASK (1 << 5)
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#define MCI_CMDRESPENDMASK (1 << 6)
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#define MCI_CMDSENTMASK (1 << 7)
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#define MCI_DATAENDMASK (1 << 8)
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#define MCI_DATABLOCKENDMASK (1 << 10)
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#define MCI_CMDACTIVEMASK (1 << 11)
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#define MCI_TXACTIVEMASK (1 << 12)
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#define MCI_RXACTIVEMASK (1 << 13)
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#define MCI_TXFIFOHALFEMPTYMASK (1 << 14)
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#define MCI_RXFIFOHALFFULLMASK (1 << 15)
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#define MCI_TXFIFOFULLMASK (1 << 16)
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#define MCI_RXFIFOFULLMASK (1 << 17)
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#define MCI_TXFIFOEMPTYMASK (1 << 18)
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#define MCI_RXFIFOEMPTYMASK (1 << 19)
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#define MCI_TXDATAAVLBLMASK (1 << 20)
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#define MCI_RXDATAAVLBLMASK (1 << 21)
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#define MCI_SDIOITMASK (1 << 22)
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#define MCI_CEATAENDMASK (1 << 23)
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#define MMCIMASK1 0x040
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#define MMCIFIFOCNT 0x048
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#define MMCIFIFO 0x080 /* to 0x0bc */
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#define MCI_IRQENABLE \
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(MCI_CMDCRCFAILMASK|MCI_DATACRCFAILMASK|MCI_CMDTIMEOUTMASK| \
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MCI_DATATIMEOUTMASK|MCI_TXUNDERRUNMASK|MCI_RXOVERRUNMASK| \
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MCI_CMDRESPENDMASK|MCI_CMDSENTMASK|MCI_DATABLOCKENDMASK)
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/* These interrupts are directed to IRQ1 when two IRQ lines are available */
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#define MCI_IRQ1MASK \
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(MCI_RXFIFOHALFFULLMASK | MCI_RXDATAAVLBLMASK | \
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MCI_TXFIFOHALFEMPTYMASK)
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#define NR_SG 16
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struct clk;
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struct variant_data;
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struct mmci_host {
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void __iomem *base;
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struct mmc_request *mrq;
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struct mmc_command *cmd;
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struct mmc_data *data;
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struct mmc_host *mmc;
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struct clk *clk;
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int gpio_cd;
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int gpio_wp;
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int gpio_cd_irq;
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bool singleirq;
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unsigned int data_xfered;
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spinlock_t lock;
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unsigned int mclk;
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unsigned int cclk;
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u32 pwr;
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struct mmci_platform_data *plat;
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struct variant_data *variant;
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u8 hw_designer;
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u8 hw_revision:4;
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struct timer_list timer;
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unsigned int oldstat;
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bool blockend;
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bool dataend;
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/* pio stuff */
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struct sg_mapping_iter sg_miter;
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unsigned int size;
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struct regulator *vcc;
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};
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