a98087cf81
Some controllers report an invalid iomem size, but seem to work correctly anyway. Change our current error to just a warning and hope it doesn't cause too much problems. Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
1545 lines
37 KiB
C
1545 lines
37 KiB
C
/*
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* linux/drivers/mmc/sdhci.c - Secure Digital Host Controller Interface driver
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*
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* Copyright (C) 2005-2006 Pierre Ossman, 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 as published by
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* the Free Software Foundation; either version 2 of the License, or (at
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* your option) any later version.
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*/
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#include <linux/delay.h>
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#include <linux/highmem.h>
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#include <linux/pci.h>
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#include <linux/dma-mapping.h>
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#include <linux/mmc/host.h>
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#include <linux/mmc/protocol.h>
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#include <asm/scatterlist.h>
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#include "sdhci.h"
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#define DRIVER_NAME "sdhci"
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#define DRIVER_VERSION "0.12"
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#define BUGMAIL "<sdhci-devel@list.drzeus.cx>"
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#define DBG(f, x...) \
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pr_debug(DRIVER_NAME " [%s()]: " f, __func__,## x)
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static unsigned int debug_nodma = 0;
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static unsigned int debug_forcedma = 0;
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static unsigned int debug_quirks = 0;
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#define SDHCI_QUIRK_CLOCK_BEFORE_RESET (1<<0)
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#define SDHCI_QUIRK_FORCE_DMA (1<<1)
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/* Controller doesn't like some resets when there is no card inserted. */
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#define SDHCI_QUIRK_NO_CARD_NO_RESET (1<<2)
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static const struct pci_device_id pci_ids[] __devinitdata = {
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{
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.vendor = PCI_VENDOR_ID_RICOH,
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.device = PCI_DEVICE_ID_RICOH_R5C822,
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.subvendor = PCI_VENDOR_ID_IBM,
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.subdevice = PCI_ANY_ID,
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.driver_data = SDHCI_QUIRK_CLOCK_BEFORE_RESET |
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SDHCI_QUIRK_FORCE_DMA,
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},
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{
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.vendor = PCI_VENDOR_ID_RICOH,
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.device = PCI_DEVICE_ID_RICOH_R5C822,
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.subvendor = PCI_ANY_ID,
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.subdevice = PCI_ANY_ID,
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.driver_data = SDHCI_QUIRK_FORCE_DMA |
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SDHCI_QUIRK_NO_CARD_NO_RESET,
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},
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{
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.vendor = PCI_VENDOR_ID_TI,
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.device = PCI_DEVICE_ID_TI_XX21_XX11_SD,
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.subvendor = PCI_ANY_ID,
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.subdevice = PCI_ANY_ID,
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.driver_data = SDHCI_QUIRK_FORCE_DMA,
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},
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{ /* Generic SD host controller */
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PCI_DEVICE_CLASS((PCI_CLASS_SYSTEM_SDHCI << 8), 0xFFFF00)
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},
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{ /* end: all zeroes */ },
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};
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MODULE_DEVICE_TABLE(pci, pci_ids);
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static void sdhci_prepare_data(struct sdhci_host *, struct mmc_data *);
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static void sdhci_finish_data(struct sdhci_host *);
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static void sdhci_send_command(struct sdhci_host *, struct mmc_command *);
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static void sdhci_finish_command(struct sdhci_host *);
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static void sdhci_dumpregs(struct sdhci_host *host)
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{
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printk(KERN_DEBUG DRIVER_NAME ": ============== REGISTER DUMP ==============\n");
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printk(KERN_DEBUG DRIVER_NAME ": Sys addr: 0x%08x | Version: 0x%08x\n",
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readl(host->ioaddr + SDHCI_DMA_ADDRESS),
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readw(host->ioaddr + SDHCI_HOST_VERSION));
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printk(KERN_DEBUG DRIVER_NAME ": Blk size: 0x%08x | Blk cnt: 0x%08x\n",
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readw(host->ioaddr + SDHCI_BLOCK_SIZE),
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readw(host->ioaddr + SDHCI_BLOCK_COUNT));
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printk(KERN_DEBUG DRIVER_NAME ": Argument: 0x%08x | Trn mode: 0x%08x\n",
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readl(host->ioaddr + SDHCI_ARGUMENT),
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readw(host->ioaddr + SDHCI_TRANSFER_MODE));
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printk(KERN_DEBUG DRIVER_NAME ": Present: 0x%08x | Host ctl: 0x%08x\n",
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readl(host->ioaddr + SDHCI_PRESENT_STATE),
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readb(host->ioaddr + SDHCI_HOST_CONTROL));
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printk(KERN_DEBUG DRIVER_NAME ": Power: 0x%08x | Blk gap: 0x%08x\n",
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readb(host->ioaddr + SDHCI_POWER_CONTROL),
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readb(host->ioaddr + SDHCI_BLOCK_GAP_CONTROL));
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printk(KERN_DEBUG DRIVER_NAME ": Wake-up: 0x%08x | Clock: 0x%08x\n",
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readb(host->ioaddr + SDHCI_WALK_UP_CONTROL),
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readw(host->ioaddr + SDHCI_CLOCK_CONTROL));
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printk(KERN_DEBUG DRIVER_NAME ": Timeout: 0x%08x | Int stat: 0x%08x\n",
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readb(host->ioaddr + SDHCI_TIMEOUT_CONTROL),
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readl(host->ioaddr + SDHCI_INT_STATUS));
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printk(KERN_DEBUG DRIVER_NAME ": Int enab: 0x%08x | Sig enab: 0x%08x\n",
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readl(host->ioaddr + SDHCI_INT_ENABLE),
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readl(host->ioaddr + SDHCI_SIGNAL_ENABLE));
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printk(KERN_DEBUG DRIVER_NAME ": AC12 err: 0x%08x | Slot int: 0x%08x\n",
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readw(host->ioaddr + SDHCI_ACMD12_ERR),
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readw(host->ioaddr + SDHCI_SLOT_INT_STATUS));
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printk(KERN_DEBUG DRIVER_NAME ": Caps: 0x%08x | Max curr: 0x%08x\n",
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readl(host->ioaddr + SDHCI_CAPABILITIES),
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readl(host->ioaddr + SDHCI_MAX_CURRENT));
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printk(KERN_DEBUG DRIVER_NAME ": ===========================================\n");
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}
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/*****************************************************************************\
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* *
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* Low level functions *
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* *
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\*****************************************************************************/
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static void sdhci_reset(struct sdhci_host *host, u8 mask)
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{
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unsigned long timeout;
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if (host->chip->quirks & SDHCI_QUIRK_NO_CARD_NO_RESET) {
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if (!(readl(host->ioaddr + SDHCI_PRESENT_STATE) &
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SDHCI_CARD_PRESENT))
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return;
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}
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writeb(mask, host->ioaddr + SDHCI_SOFTWARE_RESET);
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if (mask & SDHCI_RESET_ALL)
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host->clock = 0;
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/* Wait max 100 ms */
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timeout = 100;
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/* hw clears the bit when it's done */
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while (readb(host->ioaddr + SDHCI_SOFTWARE_RESET) & mask) {
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if (timeout == 0) {
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printk(KERN_ERR "%s: Reset 0x%x never completed. "
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"Please report this to " BUGMAIL ".\n",
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mmc_hostname(host->mmc), (int)mask);
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sdhci_dumpregs(host);
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return;
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}
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timeout--;
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mdelay(1);
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}
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}
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static void sdhci_init(struct sdhci_host *host)
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{
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u32 intmask;
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sdhci_reset(host, SDHCI_RESET_ALL);
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intmask = SDHCI_INT_BUS_POWER | SDHCI_INT_DATA_END_BIT |
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SDHCI_INT_DATA_CRC | SDHCI_INT_DATA_TIMEOUT | SDHCI_INT_INDEX |
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SDHCI_INT_END_BIT | SDHCI_INT_CRC | SDHCI_INT_TIMEOUT |
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SDHCI_INT_CARD_REMOVE | SDHCI_INT_CARD_INSERT |
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SDHCI_INT_DATA_AVAIL | SDHCI_INT_SPACE_AVAIL |
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SDHCI_INT_DMA_END | SDHCI_INT_DATA_END | SDHCI_INT_RESPONSE;
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writel(intmask, host->ioaddr + SDHCI_INT_ENABLE);
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writel(intmask, host->ioaddr + SDHCI_SIGNAL_ENABLE);
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}
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static void sdhci_activate_led(struct sdhci_host *host)
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{
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u8 ctrl;
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ctrl = readb(host->ioaddr + SDHCI_HOST_CONTROL);
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ctrl |= SDHCI_CTRL_LED;
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writeb(ctrl, host->ioaddr + SDHCI_HOST_CONTROL);
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}
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static void sdhci_deactivate_led(struct sdhci_host *host)
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{
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u8 ctrl;
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ctrl = readb(host->ioaddr + SDHCI_HOST_CONTROL);
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ctrl &= ~SDHCI_CTRL_LED;
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writeb(ctrl, host->ioaddr + SDHCI_HOST_CONTROL);
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}
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/*****************************************************************************\
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* *
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* Core functions *
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* *
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\*****************************************************************************/
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static inline char* sdhci_kmap_sg(struct sdhci_host* host)
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{
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host->mapped_sg = kmap_atomic(host->cur_sg->page, KM_BIO_SRC_IRQ);
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return host->mapped_sg + host->cur_sg->offset;
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}
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static inline void sdhci_kunmap_sg(struct sdhci_host* host)
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{
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kunmap_atomic(host->mapped_sg, KM_BIO_SRC_IRQ);
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}
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static inline int sdhci_next_sg(struct sdhci_host* host)
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{
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/*
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* Skip to next SG entry.
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*/
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host->cur_sg++;
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host->num_sg--;
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/*
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* Any entries left?
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*/
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if (host->num_sg > 0) {
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host->offset = 0;
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host->remain = host->cur_sg->length;
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}
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return host->num_sg;
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}
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static void sdhci_read_block_pio(struct sdhci_host *host)
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{
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int blksize, chunk_remain;
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u32 data;
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char *buffer;
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int size;
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DBG("PIO reading\n");
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blksize = host->data->blksz;
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chunk_remain = 0;
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data = 0;
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buffer = sdhci_kmap_sg(host) + host->offset;
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while (blksize) {
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if (chunk_remain == 0) {
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data = readl(host->ioaddr + SDHCI_BUFFER);
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chunk_remain = min(blksize, 4);
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}
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size = min(host->size, host->remain);
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size = min(size, chunk_remain);
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chunk_remain -= size;
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blksize -= size;
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host->offset += size;
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host->remain -= size;
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host->size -= size;
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while (size) {
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*buffer = data & 0xFF;
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buffer++;
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data >>= 8;
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size--;
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}
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if (host->remain == 0) {
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sdhci_kunmap_sg(host);
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if (sdhci_next_sg(host) == 0) {
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BUG_ON(blksize != 0);
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return;
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}
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buffer = sdhci_kmap_sg(host);
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}
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}
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sdhci_kunmap_sg(host);
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}
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static void sdhci_write_block_pio(struct sdhci_host *host)
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{
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int blksize, chunk_remain;
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u32 data;
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char *buffer;
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int bytes, size;
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DBG("PIO writing\n");
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blksize = host->data->blksz;
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chunk_remain = 4;
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data = 0;
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bytes = 0;
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buffer = sdhci_kmap_sg(host) + host->offset;
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while (blksize) {
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size = min(host->size, host->remain);
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size = min(size, chunk_remain);
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chunk_remain -= size;
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blksize -= size;
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host->offset += size;
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host->remain -= size;
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host->size -= size;
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while (size) {
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data >>= 8;
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data |= (u32)*buffer << 24;
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buffer++;
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size--;
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}
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if (chunk_remain == 0) {
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writel(data, host->ioaddr + SDHCI_BUFFER);
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chunk_remain = min(blksize, 4);
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}
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if (host->remain == 0) {
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sdhci_kunmap_sg(host);
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if (sdhci_next_sg(host) == 0) {
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BUG_ON(blksize != 0);
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return;
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}
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buffer = sdhci_kmap_sg(host);
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}
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}
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sdhci_kunmap_sg(host);
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}
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static void sdhci_transfer_pio(struct sdhci_host *host)
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{
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u32 mask;
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BUG_ON(!host->data);
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if (host->size == 0)
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return;
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if (host->data->flags & MMC_DATA_READ)
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mask = SDHCI_DATA_AVAILABLE;
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else
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mask = SDHCI_SPACE_AVAILABLE;
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while (readl(host->ioaddr + SDHCI_PRESENT_STATE) & mask) {
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if (host->data->flags & MMC_DATA_READ)
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sdhci_read_block_pio(host);
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else
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sdhci_write_block_pio(host);
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if (host->size == 0)
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break;
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BUG_ON(host->num_sg == 0);
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}
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DBG("PIO transfer complete.\n");
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}
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static void sdhci_prepare_data(struct sdhci_host *host, struct mmc_data *data)
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{
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u8 count;
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unsigned target_timeout, current_timeout;
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WARN_ON(host->data);
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if (data == NULL)
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return;
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DBG("blksz %04x blks %04x flags %08x\n",
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data->blksz, data->blocks, data->flags);
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DBG("tsac %d ms nsac %d clk\n",
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data->timeout_ns / 1000000, data->timeout_clks);
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/* Sanity checks */
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BUG_ON(data->blksz * data->blocks > 524288);
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BUG_ON(data->blksz > host->max_block);
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BUG_ON(data->blocks > 65535);
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/* timeout in us */
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target_timeout = data->timeout_ns / 1000 +
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data->timeout_clks / host->clock;
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/*
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* Figure out needed cycles.
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* We do this in steps in order to fit inside a 32 bit int.
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* The first step is the minimum timeout, which will have a
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* minimum resolution of 6 bits:
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* (1) 2^13*1000 > 2^22,
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* (2) host->timeout_clk < 2^16
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* =>
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* (1) / (2) > 2^6
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*/
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count = 0;
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current_timeout = (1 << 13) * 1000 / host->timeout_clk;
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while (current_timeout < target_timeout) {
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count++;
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current_timeout <<= 1;
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if (count >= 0xF)
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break;
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}
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if (count >= 0xF) {
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printk(KERN_WARNING "%s: Too large timeout requested!\n",
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mmc_hostname(host->mmc));
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count = 0xE;
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}
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writeb(count, host->ioaddr + SDHCI_TIMEOUT_CONTROL);
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if (host->flags & SDHCI_USE_DMA) {
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int count;
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count = pci_map_sg(host->chip->pdev, data->sg, data->sg_len,
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(data->flags & MMC_DATA_READ)?PCI_DMA_FROMDEVICE:PCI_DMA_TODEVICE);
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BUG_ON(count != 1);
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writel(sg_dma_address(data->sg), host->ioaddr + SDHCI_DMA_ADDRESS);
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} else {
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host->size = data->blksz * data->blocks;
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host->cur_sg = data->sg;
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host->num_sg = data->sg_len;
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host->offset = 0;
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host->remain = host->cur_sg->length;
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}
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/* We do not handle DMA boundaries, so set it to max (512 KiB) */
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writew(SDHCI_MAKE_BLKSZ(7, data->blksz),
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host->ioaddr + SDHCI_BLOCK_SIZE);
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writew(data->blocks, host->ioaddr + SDHCI_BLOCK_COUNT);
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}
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static void sdhci_set_transfer_mode(struct sdhci_host *host,
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struct mmc_data *data)
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{
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u16 mode;
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WARN_ON(host->data);
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if (data == NULL)
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return;
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mode = SDHCI_TRNS_BLK_CNT_EN;
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if (data->blocks > 1)
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mode |= SDHCI_TRNS_MULTI;
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if (data->flags & MMC_DATA_READ)
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mode |= SDHCI_TRNS_READ;
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if (host->flags & SDHCI_USE_DMA)
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mode |= SDHCI_TRNS_DMA;
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writew(mode, host->ioaddr + SDHCI_TRANSFER_MODE);
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}
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static void sdhci_finish_data(struct sdhci_host *host)
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{
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struct mmc_data *data;
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u16 blocks;
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BUG_ON(!host->data);
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data = host->data;
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host->data = NULL;
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if (host->flags & SDHCI_USE_DMA) {
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pci_unmap_sg(host->chip->pdev, data->sg, data->sg_len,
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(data->flags & MMC_DATA_READ)?PCI_DMA_FROMDEVICE:PCI_DMA_TODEVICE);
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}
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/*
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* Controller doesn't count down when in single block mode.
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*/
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if ((data->blocks == 1) && (data->error == MMC_ERR_NONE))
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blocks = 0;
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else
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blocks = readw(host->ioaddr + SDHCI_BLOCK_COUNT);
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data->bytes_xfered = data->blksz * (data->blocks - blocks);
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if ((data->error == MMC_ERR_NONE) && blocks) {
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printk(KERN_ERR "%s: Controller signalled completion even "
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"though there were blocks left. Please report this "
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"to " BUGMAIL ".\n", mmc_hostname(host->mmc));
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data->error = MMC_ERR_FAILED;
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} else if (host->size != 0) {
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printk(KERN_ERR "%s: %d bytes were left untransferred. "
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"Please report this to " BUGMAIL ".\n",
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mmc_hostname(host->mmc), host->size);
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data->error = MMC_ERR_FAILED;
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}
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DBG("Ending data transfer (%d bytes)\n", data->bytes_xfered);
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|
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if (data->stop) {
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/*
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* The controller needs a reset of internal state machines
|
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* upon error conditions.
|
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*/
|
|
if (data->error != MMC_ERR_NONE) {
|
|
sdhci_reset(host, SDHCI_RESET_CMD);
|
|
sdhci_reset(host, SDHCI_RESET_DATA);
|
|
}
|
|
|
|
sdhci_send_command(host, data->stop);
|
|
} else
|
|
tasklet_schedule(&host->finish_tasklet);
|
|
}
|
|
|
|
static void sdhci_send_command(struct sdhci_host *host, struct mmc_command *cmd)
|
|
{
|
|
int flags;
|
|
u32 mask;
|
|
unsigned long timeout;
|
|
|
|
WARN_ON(host->cmd);
|
|
|
|
DBG("Sending cmd (%x)\n", cmd->opcode);
|
|
|
|
/* Wait max 10 ms */
|
|
timeout = 10;
|
|
|
|
mask = SDHCI_CMD_INHIBIT;
|
|
if ((cmd->data != NULL) || (cmd->flags & MMC_RSP_BUSY))
|
|
mask |= SDHCI_DATA_INHIBIT;
|
|
|
|
/* We shouldn't wait for data inihibit for stop commands, even
|
|
though they might use busy signaling */
|
|
if (host->mrq->data && (cmd == host->mrq->data->stop))
|
|
mask &= ~SDHCI_DATA_INHIBIT;
|
|
|
|
while (readl(host->ioaddr + SDHCI_PRESENT_STATE) & mask) {
|
|
if (timeout == 0) {
|
|
printk(KERN_ERR "%s: Controller never released "
|
|
"inhibit bit(s). Please report this to "
|
|
BUGMAIL ".\n", mmc_hostname(host->mmc));
|
|
sdhci_dumpregs(host);
|
|
cmd->error = MMC_ERR_FAILED;
|
|
tasklet_schedule(&host->finish_tasklet);
|
|
return;
|
|
}
|
|
timeout--;
|
|
mdelay(1);
|
|
}
|
|
|
|
mod_timer(&host->timer, jiffies + 10 * HZ);
|
|
|
|
host->cmd = cmd;
|
|
|
|
sdhci_prepare_data(host, cmd->data);
|
|
|
|
writel(cmd->arg, host->ioaddr + SDHCI_ARGUMENT);
|
|
|
|
sdhci_set_transfer_mode(host, cmd->data);
|
|
|
|
if ((cmd->flags & MMC_RSP_136) && (cmd->flags & MMC_RSP_BUSY)) {
|
|
printk(KERN_ERR "%s: Unsupported response type! "
|
|
"Please report this to " BUGMAIL ".\n",
|
|
mmc_hostname(host->mmc));
|
|
cmd->error = MMC_ERR_INVALID;
|
|
tasklet_schedule(&host->finish_tasklet);
|
|
return;
|
|
}
|
|
|
|
if (!(cmd->flags & MMC_RSP_PRESENT))
|
|
flags = SDHCI_CMD_RESP_NONE;
|
|
else if (cmd->flags & MMC_RSP_136)
|
|
flags = SDHCI_CMD_RESP_LONG;
|
|
else if (cmd->flags & MMC_RSP_BUSY)
|
|
flags = SDHCI_CMD_RESP_SHORT_BUSY;
|
|
else
|
|
flags = SDHCI_CMD_RESP_SHORT;
|
|
|
|
if (cmd->flags & MMC_RSP_CRC)
|
|
flags |= SDHCI_CMD_CRC;
|
|
if (cmd->flags & MMC_RSP_OPCODE)
|
|
flags |= SDHCI_CMD_INDEX;
|
|
if (cmd->data)
|
|
flags |= SDHCI_CMD_DATA;
|
|
|
|
writew(SDHCI_MAKE_CMD(cmd->opcode, flags),
|
|
host->ioaddr + SDHCI_COMMAND);
|
|
}
|
|
|
|
static void sdhci_finish_command(struct sdhci_host *host)
|
|
{
|
|
int i;
|
|
|
|
BUG_ON(host->cmd == NULL);
|
|
|
|
if (host->cmd->flags & MMC_RSP_PRESENT) {
|
|
if (host->cmd->flags & MMC_RSP_136) {
|
|
/* CRC is stripped so we need to do some shifting. */
|
|
for (i = 0;i < 4;i++) {
|
|
host->cmd->resp[i] = readl(host->ioaddr +
|
|
SDHCI_RESPONSE + (3-i)*4) << 8;
|
|
if (i != 3)
|
|
host->cmd->resp[i] |=
|
|
readb(host->ioaddr +
|
|
SDHCI_RESPONSE + (3-i)*4-1);
|
|
}
|
|
} else {
|
|
host->cmd->resp[0] = readl(host->ioaddr + SDHCI_RESPONSE);
|
|
}
|
|
}
|
|
|
|
host->cmd->error = MMC_ERR_NONE;
|
|
|
|
DBG("Ending cmd (%x)\n", host->cmd->opcode);
|
|
|
|
if (host->cmd->data)
|
|
host->data = host->cmd->data;
|
|
else
|
|
tasklet_schedule(&host->finish_tasklet);
|
|
|
|
host->cmd = NULL;
|
|
}
|
|
|
|
static void sdhci_set_clock(struct sdhci_host *host, unsigned int clock)
|
|
{
|
|
int div;
|
|
u8 ctrl;
|
|
u16 clk;
|
|
unsigned long timeout;
|
|
|
|
if (clock == host->clock)
|
|
return;
|
|
|
|
writew(0, host->ioaddr + SDHCI_CLOCK_CONTROL);
|
|
|
|
ctrl = readb(host->ioaddr + SDHCI_HOST_CONTROL);
|
|
if (clock > 25000000)
|
|
ctrl |= SDHCI_CTRL_HISPD;
|
|
else
|
|
ctrl &= ~SDHCI_CTRL_HISPD;
|
|
writeb(ctrl, host->ioaddr + SDHCI_HOST_CONTROL);
|
|
|
|
if (clock == 0)
|
|
goto out;
|
|
|
|
for (div = 1;div < 256;div *= 2) {
|
|
if ((host->max_clk / div) <= clock)
|
|
break;
|
|
}
|
|
div >>= 1;
|
|
|
|
clk = div << SDHCI_DIVIDER_SHIFT;
|
|
clk |= SDHCI_CLOCK_INT_EN;
|
|
writew(clk, host->ioaddr + SDHCI_CLOCK_CONTROL);
|
|
|
|
/* Wait max 10 ms */
|
|
timeout = 10;
|
|
while (!((clk = readw(host->ioaddr + SDHCI_CLOCK_CONTROL))
|
|
& SDHCI_CLOCK_INT_STABLE)) {
|
|
if (timeout == 0) {
|
|
printk(KERN_ERR "%s: Internal clock never stabilised. "
|
|
"Please report this to " BUGMAIL ".\n",
|
|
mmc_hostname(host->mmc));
|
|
sdhci_dumpregs(host);
|
|
return;
|
|
}
|
|
timeout--;
|
|
mdelay(1);
|
|
}
|
|
|
|
clk |= SDHCI_CLOCK_CARD_EN;
|
|
writew(clk, host->ioaddr + SDHCI_CLOCK_CONTROL);
|
|
|
|
out:
|
|
host->clock = clock;
|
|
}
|
|
|
|
static void sdhci_set_power(struct sdhci_host *host, unsigned short power)
|
|
{
|
|
u8 pwr;
|
|
|
|
if (host->power == power)
|
|
return;
|
|
|
|
writeb(0, host->ioaddr + SDHCI_POWER_CONTROL);
|
|
|
|
if (power == (unsigned short)-1)
|
|
goto out;
|
|
|
|
pwr = SDHCI_POWER_ON;
|
|
|
|
switch (power) {
|
|
case MMC_VDD_170:
|
|
case MMC_VDD_180:
|
|
case MMC_VDD_190:
|
|
pwr |= SDHCI_POWER_180;
|
|
break;
|
|
case MMC_VDD_290:
|
|
case MMC_VDD_300:
|
|
case MMC_VDD_310:
|
|
pwr |= SDHCI_POWER_300;
|
|
break;
|
|
case MMC_VDD_320:
|
|
case MMC_VDD_330:
|
|
case MMC_VDD_340:
|
|
pwr |= SDHCI_POWER_330;
|
|
break;
|
|
default:
|
|
BUG();
|
|
}
|
|
|
|
writeb(pwr, host->ioaddr + SDHCI_POWER_CONTROL);
|
|
|
|
out:
|
|
host->power = power;
|
|
}
|
|
|
|
/*****************************************************************************\
|
|
* *
|
|
* MMC callbacks *
|
|
* *
|
|
\*****************************************************************************/
|
|
|
|
static void sdhci_request(struct mmc_host *mmc, struct mmc_request *mrq)
|
|
{
|
|
struct sdhci_host *host;
|
|
unsigned long flags;
|
|
|
|
host = mmc_priv(mmc);
|
|
|
|
spin_lock_irqsave(&host->lock, flags);
|
|
|
|
WARN_ON(host->mrq != NULL);
|
|
|
|
sdhci_activate_led(host);
|
|
|
|
host->mrq = mrq;
|
|
|
|
if (!(readl(host->ioaddr + SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT)) {
|
|
host->mrq->cmd->error = MMC_ERR_TIMEOUT;
|
|
tasklet_schedule(&host->finish_tasklet);
|
|
} else
|
|
sdhci_send_command(host, mrq->cmd);
|
|
|
|
mmiowb();
|
|
spin_unlock_irqrestore(&host->lock, flags);
|
|
}
|
|
|
|
static void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
|
|
{
|
|
struct sdhci_host *host;
|
|
unsigned long flags;
|
|
u8 ctrl;
|
|
|
|
host = mmc_priv(mmc);
|
|
|
|
spin_lock_irqsave(&host->lock, flags);
|
|
|
|
/*
|
|
* Reset the chip on each power off.
|
|
* Should clear out any weird states.
|
|
*/
|
|
if (ios->power_mode == MMC_POWER_OFF) {
|
|
writel(0, host->ioaddr + SDHCI_SIGNAL_ENABLE);
|
|
sdhci_init(host);
|
|
}
|
|
|
|
sdhci_set_clock(host, ios->clock);
|
|
|
|
if (ios->power_mode == MMC_POWER_OFF)
|
|
sdhci_set_power(host, -1);
|
|
else
|
|
sdhci_set_power(host, ios->vdd);
|
|
|
|
ctrl = readb(host->ioaddr + SDHCI_HOST_CONTROL);
|
|
if (ios->bus_width == MMC_BUS_WIDTH_4)
|
|
ctrl |= SDHCI_CTRL_4BITBUS;
|
|
else
|
|
ctrl &= ~SDHCI_CTRL_4BITBUS;
|
|
writeb(ctrl, host->ioaddr + SDHCI_HOST_CONTROL);
|
|
|
|
mmiowb();
|
|
spin_unlock_irqrestore(&host->lock, flags);
|
|
}
|
|
|
|
static int sdhci_get_ro(struct mmc_host *mmc)
|
|
{
|
|
struct sdhci_host *host;
|
|
unsigned long flags;
|
|
int present;
|
|
|
|
host = mmc_priv(mmc);
|
|
|
|
spin_lock_irqsave(&host->lock, flags);
|
|
|
|
present = readl(host->ioaddr + SDHCI_PRESENT_STATE);
|
|
|
|
spin_unlock_irqrestore(&host->lock, flags);
|
|
|
|
return !(present & SDHCI_WRITE_PROTECT);
|
|
}
|
|
|
|
static const struct mmc_host_ops sdhci_ops = {
|
|
.request = sdhci_request,
|
|
.set_ios = sdhci_set_ios,
|
|
.get_ro = sdhci_get_ro,
|
|
};
|
|
|
|
/*****************************************************************************\
|
|
* *
|
|
* Tasklets *
|
|
* *
|
|
\*****************************************************************************/
|
|
|
|
static void sdhci_tasklet_card(unsigned long param)
|
|
{
|
|
struct sdhci_host *host;
|
|
unsigned long flags;
|
|
|
|
host = (struct sdhci_host*)param;
|
|
|
|
spin_lock_irqsave(&host->lock, flags);
|
|
|
|
if (!(readl(host->ioaddr + SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT)) {
|
|
if (host->mrq) {
|
|
printk(KERN_ERR "%s: Card removed during transfer!\n",
|
|
mmc_hostname(host->mmc));
|
|
printk(KERN_ERR "%s: Resetting controller.\n",
|
|
mmc_hostname(host->mmc));
|
|
|
|
sdhci_reset(host, SDHCI_RESET_CMD);
|
|
sdhci_reset(host, SDHCI_RESET_DATA);
|
|
|
|
host->mrq->cmd->error = MMC_ERR_FAILED;
|
|
tasklet_schedule(&host->finish_tasklet);
|
|
}
|
|
}
|
|
|
|
spin_unlock_irqrestore(&host->lock, flags);
|
|
|
|
mmc_detect_change(host->mmc, msecs_to_jiffies(500));
|
|
}
|
|
|
|
static void sdhci_tasklet_finish(unsigned long param)
|
|
{
|
|
struct sdhci_host *host;
|
|
unsigned long flags;
|
|
struct mmc_request *mrq;
|
|
|
|
host = (struct sdhci_host*)param;
|
|
|
|
spin_lock_irqsave(&host->lock, flags);
|
|
|
|
del_timer(&host->timer);
|
|
|
|
mrq = host->mrq;
|
|
|
|
DBG("Ending request, cmd (%x)\n", mrq->cmd->opcode);
|
|
|
|
/*
|
|
* The controller needs a reset of internal state machines
|
|
* upon error conditions.
|
|
*/
|
|
if ((mrq->cmd->error != MMC_ERR_NONE) ||
|
|
(mrq->data && ((mrq->data->error != MMC_ERR_NONE) ||
|
|
(mrq->data->stop && (mrq->data->stop->error != MMC_ERR_NONE))))) {
|
|
|
|
/* Some controllers need this kick or reset won't work here */
|
|
if (host->chip->quirks & SDHCI_QUIRK_CLOCK_BEFORE_RESET) {
|
|
unsigned int clock;
|
|
|
|
/* This is to force an update */
|
|
clock = host->clock;
|
|
host->clock = 0;
|
|
sdhci_set_clock(host, clock);
|
|
}
|
|
|
|
/* Spec says we should do both at the same time, but Ricoh
|
|
controllers do not like that. */
|
|
sdhci_reset(host, SDHCI_RESET_CMD);
|
|
sdhci_reset(host, SDHCI_RESET_DATA);
|
|
}
|
|
|
|
host->mrq = NULL;
|
|
host->cmd = NULL;
|
|
host->data = NULL;
|
|
|
|
sdhci_deactivate_led(host);
|
|
|
|
mmiowb();
|
|
spin_unlock_irqrestore(&host->lock, flags);
|
|
|
|
mmc_request_done(host->mmc, mrq);
|
|
}
|
|
|
|
static void sdhci_timeout_timer(unsigned long data)
|
|
{
|
|
struct sdhci_host *host;
|
|
unsigned long flags;
|
|
|
|
host = (struct sdhci_host*)data;
|
|
|
|
spin_lock_irqsave(&host->lock, flags);
|
|
|
|
if (host->mrq) {
|
|
printk(KERN_ERR "%s: Timeout waiting for hardware interrupt. "
|
|
"Please report this to " BUGMAIL ".\n",
|
|
mmc_hostname(host->mmc));
|
|
sdhci_dumpregs(host);
|
|
|
|
if (host->data) {
|
|
host->data->error = MMC_ERR_TIMEOUT;
|
|
sdhci_finish_data(host);
|
|
} else {
|
|
if (host->cmd)
|
|
host->cmd->error = MMC_ERR_TIMEOUT;
|
|
else
|
|
host->mrq->cmd->error = MMC_ERR_TIMEOUT;
|
|
|
|
tasklet_schedule(&host->finish_tasklet);
|
|
}
|
|
}
|
|
|
|
mmiowb();
|
|
spin_unlock_irqrestore(&host->lock, flags);
|
|
}
|
|
|
|
/*****************************************************************************\
|
|
* *
|
|
* Interrupt handling *
|
|
* *
|
|
\*****************************************************************************/
|
|
|
|
static void sdhci_cmd_irq(struct sdhci_host *host, u32 intmask)
|
|
{
|
|
BUG_ON(intmask == 0);
|
|
|
|
if (!host->cmd) {
|
|
printk(KERN_ERR "%s: Got command interrupt even though no "
|
|
"command operation was in progress.\n",
|
|
mmc_hostname(host->mmc));
|
|
printk(KERN_ERR "%s: Please report this to " BUGMAIL ".\n",
|
|
mmc_hostname(host->mmc));
|
|
sdhci_dumpregs(host);
|
|
return;
|
|
}
|
|
|
|
if (intmask & SDHCI_INT_RESPONSE)
|
|
sdhci_finish_command(host);
|
|
else {
|
|
if (intmask & SDHCI_INT_TIMEOUT)
|
|
host->cmd->error = MMC_ERR_TIMEOUT;
|
|
else if (intmask & SDHCI_INT_CRC)
|
|
host->cmd->error = MMC_ERR_BADCRC;
|
|
else if (intmask & (SDHCI_INT_END_BIT | SDHCI_INT_INDEX))
|
|
host->cmd->error = MMC_ERR_FAILED;
|
|
else
|
|
host->cmd->error = MMC_ERR_INVALID;
|
|
|
|
tasklet_schedule(&host->finish_tasklet);
|
|
}
|
|
}
|
|
|
|
static void sdhci_data_irq(struct sdhci_host *host, u32 intmask)
|
|
{
|
|
BUG_ON(intmask == 0);
|
|
|
|
if (!host->data) {
|
|
/*
|
|
* A data end interrupt is sent together with the response
|
|
* for the stop command.
|
|
*/
|
|
if (intmask & SDHCI_INT_DATA_END)
|
|
return;
|
|
|
|
printk(KERN_ERR "%s: Got data interrupt even though no "
|
|
"data operation was in progress.\n",
|
|
mmc_hostname(host->mmc));
|
|
printk(KERN_ERR "%s: Please report this to " BUGMAIL ".\n",
|
|
mmc_hostname(host->mmc));
|
|
sdhci_dumpregs(host);
|
|
|
|
return;
|
|
}
|
|
|
|
if (intmask & SDHCI_INT_DATA_TIMEOUT)
|
|
host->data->error = MMC_ERR_TIMEOUT;
|
|
else if (intmask & SDHCI_INT_DATA_CRC)
|
|
host->data->error = MMC_ERR_BADCRC;
|
|
else if (intmask & SDHCI_INT_DATA_END_BIT)
|
|
host->data->error = MMC_ERR_FAILED;
|
|
|
|
if (host->data->error != MMC_ERR_NONE)
|
|
sdhci_finish_data(host);
|
|
else {
|
|
if (intmask & (SDHCI_INT_DATA_AVAIL | SDHCI_INT_SPACE_AVAIL))
|
|
sdhci_transfer_pio(host);
|
|
|
|
if (intmask & SDHCI_INT_DATA_END)
|
|
sdhci_finish_data(host);
|
|
}
|
|
}
|
|
|
|
static irqreturn_t sdhci_irq(int irq, void *dev_id)
|
|
{
|
|
irqreturn_t result;
|
|
struct sdhci_host* host = dev_id;
|
|
u32 intmask;
|
|
|
|
spin_lock(&host->lock);
|
|
|
|
intmask = readl(host->ioaddr + SDHCI_INT_STATUS);
|
|
|
|
if (!intmask) {
|
|
result = IRQ_NONE;
|
|
goto out;
|
|
}
|
|
|
|
DBG("*** %s got interrupt: 0x%08x\n", host->slot_descr, intmask);
|
|
|
|
if (intmask & (SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE)) {
|
|
writel(intmask & (SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE),
|
|
host->ioaddr + SDHCI_INT_STATUS);
|
|
tasklet_schedule(&host->card_tasklet);
|
|
}
|
|
|
|
intmask &= ~(SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE);
|
|
|
|
if (intmask & SDHCI_INT_CMD_MASK) {
|
|
writel(intmask & SDHCI_INT_CMD_MASK,
|
|
host->ioaddr + SDHCI_INT_STATUS);
|
|
sdhci_cmd_irq(host, intmask & SDHCI_INT_CMD_MASK);
|
|
}
|
|
|
|
if (intmask & SDHCI_INT_DATA_MASK) {
|
|
writel(intmask & SDHCI_INT_DATA_MASK,
|
|
host->ioaddr + SDHCI_INT_STATUS);
|
|
sdhci_data_irq(host, intmask & SDHCI_INT_DATA_MASK);
|
|
}
|
|
|
|
intmask &= ~(SDHCI_INT_CMD_MASK | SDHCI_INT_DATA_MASK);
|
|
|
|
if (intmask & SDHCI_INT_BUS_POWER) {
|
|
printk(KERN_ERR "%s: Card is consuming too much power!\n",
|
|
mmc_hostname(host->mmc));
|
|
writel(SDHCI_INT_BUS_POWER, host->ioaddr + SDHCI_INT_STATUS);
|
|
}
|
|
|
|
intmask &= SDHCI_INT_BUS_POWER;
|
|
|
|
if (intmask) {
|
|
printk(KERN_ERR "%s: Unexpected interrupt 0x%08x. Please "
|
|
"report this to " BUGMAIL ".\n",
|
|
mmc_hostname(host->mmc), intmask);
|
|
sdhci_dumpregs(host);
|
|
|
|
writel(intmask, host->ioaddr + SDHCI_INT_STATUS);
|
|
}
|
|
|
|
result = IRQ_HANDLED;
|
|
|
|
mmiowb();
|
|
out:
|
|
spin_unlock(&host->lock);
|
|
|
|
return result;
|
|
}
|
|
|
|
/*****************************************************************************\
|
|
* *
|
|
* Suspend/resume *
|
|
* *
|
|
\*****************************************************************************/
|
|
|
|
#ifdef CONFIG_PM
|
|
|
|
static int sdhci_suspend (struct pci_dev *pdev, pm_message_t state)
|
|
{
|
|
struct sdhci_chip *chip;
|
|
int i, ret;
|
|
|
|
chip = pci_get_drvdata(pdev);
|
|
if (!chip)
|
|
return 0;
|
|
|
|
DBG("Suspending...\n");
|
|
|
|
for (i = 0;i < chip->num_slots;i++) {
|
|
if (!chip->hosts[i])
|
|
continue;
|
|
ret = mmc_suspend_host(chip->hosts[i]->mmc, state);
|
|
if (ret) {
|
|
for (i--;i >= 0;i--)
|
|
mmc_resume_host(chip->hosts[i]->mmc);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
pci_save_state(pdev);
|
|
pci_enable_wake(pdev, pci_choose_state(pdev, state), 0);
|
|
pci_disable_device(pdev);
|
|
pci_set_power_state(pdev, pci_choose_state(pdev, state));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sdhci_resume (struct pci_dev *pdev)
|
|
{
|
|
struct sdhci_chip *chip;
|
|
int i, ret;
|
|
|
|
chip = pci_get_drvdata(pdev);
|
|
if (!chip)
|
|
return 0;
|
|
|
|
DBG("Resuming...\n");
|
|
|
|
pci_set_power_state(pdev, PCI_D0);
|
|
pci_restore_state(pdev);
|
|
pci_enable_device(pdev);
|
|
|
|
for (i = 0;i < chip->num_slots;i++) {
|
|
if (!chip->hosts[i])
|
|
continue;
|
|
if (chip->hosts[i]->flags & SDHCI_USE_DMA)
|
|
pci_set_master(pdev);
|
|
sdhci_init(chip->hosts[i]);
|
|
mmiowb();
|
|
ret = mmc_resume_host(chip->hosts[i]->mmc);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
#else /* CONFIG_PM */
|
|
|
|
#define sdhci_suspend NULL
|
|
#define sdhci_resume NULL
|
|
|
|
#endif /* CONFIG_PM */
|
|
|
|
/*****************************************************************************\
|
|
* *
|
|
* Device probing/removal *
|
|
* *
|
|
\*****************************************************************************/
|
|
|
|
static int __devinit sdhci_probe_slot(struct pci_dev *pdev, int slot)
|
|
{
|
|
int ret;
|
|
unsigned int version;
|
|
struct sdhci_chip *chip;
|
|
struct mmc_host *mmc;
|
|
struct sdhci_host *host;
|
|
|
|
u8 first_bar;
|
|
unsigned int caps;
|
|
|
|
chip = pci_get_drvdata(pdev);
|
|
BUG_ON(!chip);
|
|
|
|
ret = pci_read_config_byte(pdev, PCI_SLOT_INFO, &first_bar);
|
|
if (ret)
|
|
return ret;
|
|
|
|
first_bar &= PCI_SLOT_INFO_FIRST_BAR_MASK;
|
|
|
|
if (first_bar > 5) {
|
|
printk(KERN_ERR DRIVER_NAME ": Invalid first BAR. Aborting.\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
if (!(pci_resource_flags(pdev, first_bar + slot) & IORESOURCE_MEM)) {
|
|
printk(KERN_ERR DRIVER_NAME ": BAR is not iomem. Aborting.\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
if (pci_resource_len(pdev, first_bar + slot) != 0x100) {
|
|
printk(KERN_ERR DRIVER_NAME ": Invalid iomem size. "
|
|
"You may experience problems.\n");
|
|
}
|
|
|
|
if ((pdev->class & 0x0000FF) == PCI_SDHCI_IFVENDOR) {
|
|
printk(KERN_ERR DRIVER_NAME ": Vendor specific interface. Aborting.\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
if ((pdev->class & 0x0000FF) > PCI_SDHCI_IFVENDOR) {
|
|
printk(KERN_ERR DRIVER_NAME ": Unknown interface. Aborting.\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
mmc = mmc_alloc_host(sizeof(struct sdhci_host), &pdev->dev);
|
|
if (!mmc)
|
|
return -ENOMEM;
|
|
|
|
host = mmc_priv(mmc);
|
|
host->mmc = mmc;
|
|
|
|
host->chip = chip;
|
|
chip->hosts[slot] = host;
|
|
|
|
host->bar = first_bar + slot;
|
|
|
|
host->addr = pci_resource_start(pdev, host->bar);
|
|
host->irq = pdev->irq;
|
|
|
|
DBG("slot %d at 0x%08lx, irq %d\n", slot, host->addr, host->irq);
|
|
|
|
snprintf(host->slot_descr, 20, "sdhci:slot%d", slot);
|
|
|
|
ret = pci_request_region(pdev, host->bar, host->slot_descr);
|
|
if (ret)
|
|
goto free;
|
|
|
|
host->ioaddr = ioremap_nocache(host->addr,
|
|
pci_resource_len(pdev, host->bar));
|
|
if (!host->ioaddr) {
|
|
ret = -ENOMEM;
|
|
goto release;
|
|
}
|
|
|
|
sdhci_reset(host, SDHCI_RESET_ALL);
|
|
|
|
version = readw(host->ioaddr + SDHCI_HOST_VERSION);
|
|
version = (version & SDHCI_SPEC_VER_MASK) >> SDHCI_SPEC_VER_SHIFT;
|
|
if (version != 0) {
|
|
printk(KERN_ERR "%s: Unknown controller version (%d). "
|
|
"You may experience problems.\n", host->slot_descr,
|
|
version);
|
|
}
|
|
|
|
caps = readl(host->ioaddr + SDHCI_CAPABILITIES);
|
|
|
|
if (debug_nodma)
|
|
DBG("DMA forced off\n");
|
|
else if (debug_forcedma) {
|
|
DBG("DMA forced on\n");
|
|
host->flags |= SDHCI_USE_DMA;
|
|
} else if (chip->quirks & SDHCI_QUIRK_FORCE_DMA)
|
|
host->flags |= SDHCI_USE_DMA;
|
|
else if ((pdev->class & 0x0000FF) != PCI_SDHCI_IFDMA)
|
|
DBG("Controller doesn't have DMA interface\n");
|
|
else if (!(caps & SDHCI_CAN_DO_DMA))
|
|
DBG("Controller doesn't have DMA capability\n");
|
|
else
|
|
host->flags |= SDHCI_USE_DMA;
|
|
|
|
if (host->flags & SDHCI_USE_DMA) {
|
|
if (pci_set_dma_mask(pdev, DMA_32BIT_MASK)) {
|
|
printk(KERN_WARNING "%s: No suitable DMA available. "
|
|
"Falling back to PIO.\n", host->slot_descr);
|
|
host->flags &= ~SDHCI_USE_DMA;
|
|
}
|
|
}
|
|
|
|
if (host->flags & SDHCI_USE_DMA)
|
|
pci_set_master(pdev);
|
|
else /* XXX: Hack to get MMC layer to avoid highmem */
|
|
pdev->dma_mask = 0;
|
|
|
|
host->max_clk =
|
|
(caps & SDHCI_CLOCK_BASE_MASK) >> SDHCI_CLOCK_BASE_SHIFT;
|
|
if (host->max_clk == 0) {
|
|
printk(KERN_ERR "%s: Hardware doesn't specify base clock "
|
|
"frequency.\n", host->slot_descr);
|
|
ret = -ENODEV;
|
|
goto unmap;
|
|
}
|
|
host->max_clk *= 1000000;
|
|
|
|
host->timeout_clk =
|
|
(caps & SDHCI_TIMEOUT_CLK_MASK) >> SDHCI_TIMEOUT_CLK_SHIFT;
|
|
if (host->timeout_clk == 0) {
|
|
printk(KERN_ERR "%s: Hardware doesn't specify timeout clock "
|
|
"frequency.\n", host->slot_descr);
|
|
ret = -ENODEV;
|
|
goto unmap;
|
|
}
|
|
if (caps & SDHCI_TIMEOUT_CLK_UNIT)
|
|
host->timeout_clk *= 1000;
|
|
|
|
host->max_block = (caps & SDHCI_MAX_BLOCK_MASK) >> SDHCI_MAX_BLOCK_SHIFT;
|
|
if (host->max_block >= 3) {
|
|
printk(KERN_ERR "%s: Invalid maximum block size.\n",
|
|
host->slot_descr);
|
|
ret = -ENODEV;
|
|
goto unmap;
|
|
}
|
|
host->max_block = 512 << host->max_block;
|
|
|
|
/*
|
|
* Set host parameters.
|
|
*/
|
|
mmc->ops = &sdhci_ops;
|
|
mmc->f_min = host->max_clk / 256;
|
|
mmc->f_max = host->max_clk;
|
|
mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_MULTIWRITE | MMC_CAP_BYTEBLOCK;
|
|
|
|
mmc->ocr_avail = 0;
|
|
if (caps & SDHCI_CAN_VDD_330)
|
|
mmc->ocr_avail |= MMC_VDD_32_33|MMC_VDD_33_34;
|
|
else if (caps & SDHCI_CAN_VDD_300)
|
|
mmc->ocr_avail |= MMC_VDD_29_30|MMC_VDD_30_31;
|
|
else if (caps & SDHCI_CAN_VDD_180)
|
|
mmc->ocr_avail |= MMC_VDD_17_18|MMC_VDD_18_19;
|
|
|
|
if ((host->max_clk > 25000000) && !(caps & SDHCI_CAN_DO_HISPD)) {
|
|
printk(KERN_ERR "%s: Controller reports > 25 MHz base clock,"
|
|
" but no high speed support.\n",
|
|
host->slot_descr);
|
|
mmc->f_max = 25000000;
|
|
}
|
|
|
|
if (mmc->ocr_avail == 0) {
|
|
printk(KERN_ERR "%s: Hardware doesn't report any "
|
|
"support voltages.\n", host->slot_descr);
|
|
ret = -ENODEV;
|
|
goto unmap;
|
|
}
|
|
|
|
spin_lock_init(&host->lock);
|
|
|
|
/*
|
|
* Maximum number of segments. Hardware cannot do scatter lists.
|
|
*/
|
|
if (host->flags & SDHCI_USE_DMA)
|
|
mmc->max_hw_segs = 1;
|
|
else
|
|
mmc->max_hw_segs = 16;
|
|
mmc->max_phys_segs = 16;
|
|
|
|
/*
|
|
* Maximum number of sectors in one transfer. Limited by DMA boundary
|
|
* size (512KiB), which means (512 KiB/512=) 1024 entries.
|
|
*/
|
|
mmc->max_sectors = 1024;
|
|
|
|
/*
|
|
* Maximum segment size. Could be one segment with the maximum number
|
|
* of sectors.
|
|
*/
|
|
mmc->max_seg_size = mmc->max_sectors * 512;
|
|
|
|
/*
|
|
* Init tasklets.
|
|
*/
|
|
tasklet_init(&host->card_tasklet,
|
|
sdhci_tasklet_card, (unsigned long)host);
|
|
tasklet_init(&host->finish_tasklet,
|
|
sdhci_tasklet_finish, (unsigned long)host);
|
|
|
|
setup_timer(&host->timer, sdhci_timeout_timer, (unsigned long)host);
|
|
|
|
ret = request_irq(host->irq, sdhci_irq, IRQF_SHARED,
|
|
host->slot_descr, host);
|
|
if (ret)
|
|
goto untasklet;
|
|
|
|
sdhci_init(host);
|
|
|
|
#ifdef CONFIG_MMC_DEBUG
|
|
sdhci_dumpregs(host);
|
|
#endif
|
|
|
|
mmiowb();
|
|
|
|
mmc_add_host(mmc);
|
|
|
|
printk(KERN_INFO "%s: SDHCI at 0x%08lx irq %d %s\n", mmc_hostname(mmc),
|
|
host->addr, host->irq,
|
|
(host->flags & SDHCI_USE_DMA)?"DMA":"PIO");
|
|
|
|
return 0;
|
|
|
|
untasklet:
|
|
tasklet_kill(&host->card_tasklet);
|
|
tasklet_kill(&host->finish_tasklet);
|
|
unmap:
|
|
iounmap(host->ioaddr);
|
|
release:
|
|
pci_release_region(pdev, host->bar);
|
|
free:
|
|
mmc_free_host(mmc);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void sdhci_remove_slot(struct pci_dev *pdev, int slot)
|
|
{
|
|
struct sdhci_chip *chip;
|
|
struct mmc_host *mmc;
|
|
struct sdhci_host *host;
|
|
|
|
chip = pci_get_drvdata(pdev);
|
|
host = chip->hosts[slot];
|
|
mmc = host->mmc;
|
|
|
|
chip->hosts[slot] = NULL;
|
|
|
|
mmc_remove_host(mmc);
|
|
|
|
sdhci_reset(host, SDHCI_RESET_ALL);
|
|
|
|
free_irq(host->irq, host);
|
|
|
|
del_timer_sync(&host->timer);
|
|
|
|
tasklet_kill(&host->card_tasklet);
|
|
tasklet_kill(&host->finish_tasklet);
|
|
|
|
iounmap(host->ioaddr);
|
|
|
|
pci_release_region(pdev, host->bar);
|
|
|
|
mmc_free_host(mmc);
|
|
}
|
|
|
|
static int __devinit sdhci_probe(struct pci_dev *pdev,
|
|
const struct pci_device_id *ent)
|
|
{
|
|
int ret, i;
|
|
u8 slots, rev;
|
|
struct sdhci_chip *chip;
|
|
|
|
BUG_ON(pdev == NULL);
|
|
BUG_ON(ent == NULL);
|
|
|
|
pci_read_config_byte(pdev, PCI_CLASS_REVISION, &rev);
|
|
|
|
printk(KERN_INFO DRIVER_NAME
|
|
": SDHCI controller found at %s [%04x:%04x] (rev %x)\n",
|
|
pci_name(pdev), (int)pdev->vendor, (int)pdev->device,
|
|
(int)rev);
|
|
|
|
ret = pci_read_config_byte(pdev, PCI_SLOT_INFO, &slots);
|
|
if (ret)
|
|
return ret;
|
|
|
|
slots = PCI_SLOT_INFO_SLOTS(slots) + 1;
|
|
DBG("found %d slot(s)\n", slots);
|
|
if (slots == 0)
|
|
return -ENODEV;
|
|
|
|
ret = pci_enable_device(pdev);
|
|
if (ret)
|
|
return ret;
|
|
|
|
chip = kzalloc(sizeof(struct sdhci_chip) +
|
|
sizeof(struct sdhci_host*) * slots, GFP_KERNEL);
|
|
if (!chip) {
|
|
ret = -ENOMEM;
|
|
goto err;
|
|
}
|
|
|
|
chip->pdev = pdev;
|
|
chip->quirks = ent->driver_data;
|
|
|
|
if (debug_quirks)
|
|
chip->quirks = debug_quirks;
|
|
|
|
chip->num_slots = slots;
|
|
pci_set_drvdata(pdev, chip);
|
|
|
|
for (i = 0;i < slots;i++) {
|
|
ret = sdhci_probe_slot(pdev, i);
|
|
if (ret) {
|
|
for (i--;i >= 0;i--)
|
|
sdhci_remove_slot(pdev, i);
|
|
goto free;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
|
|
free:
|
|
pci_set_drvdata(pdev, NULL);
|
|
kfree(chip);
|
|
|
|
err:
|
|
pci_disable_device(pdev);
|
|
return ret;
|
|
}
|
|
|
|
static void __devexit sdhci_remove(struct pci_dev *pdev)
|
|
{
|
|
int i;
|
|
struct sdhci_chip *chip;
|
|
|
|
chip = pci_get_drvdata(pdev);
|
|
|
|
if (chip) {
|
|
for (i = 0;i < chip->num_slots;i++)
|
|
sdhci_remove_slot(pdev, i);
|
|
|
|
pci_set_drvdata(pdev, NULL);
|
|
|
|
kfree(chip);
|
|
}
|
|
|
|
pci_disable_device(pdev);
|
|
}
|
|
|
|
static struct pci_driver sdhci_driver = {
|
|
.name = DRIVER_NAME,
|
|
.id_table = pci_ids,
|
|
.probe = sdhci_probe,
|
|
.remove = __devexit_p(sdhci_remove),
|
|
.suspend = sdhci_suspend,
|
|
.resume = sdhci_resume,
|
|
};
|
|
|
|
/*****************************************************************************\
|
|
* *
|
|
* Driver init/exit *
|
|
* *
|
|
\*****************************************************************************/
|
|
|
|
static int __init sdhci_drv_init(void)
|
|
{
|
|
printk(KERN_INFO DRIVER_NAME
|
|
": Secure Digital Host Controller Interface driver, "
|
|
DRIVER_VERSION "\n");
|
|
printk(KERN_INFO DRIVER_NAME ": Copyright(c) Pierre Ossman\n");
|
|
|
|
return pci_register_driver(&sdhci_driver);
|
|
}
|
|
|
|
static void __exit sdhci_drv_exit(void)
|
|
{
|
|
DBG("Exiting\n");
|
|
|
|
pci_unregister_driver(&sdhci_driver);
|
|
}
|
|
|
|
module_init(sdhci_drv_init);
|
|
module_exit(sdhci_drv_exit);
|
|
|
|
module_param(debug_nodma, uint, 0444);
|
|
module_param(debug_forcedma, uint, 0444);
|
|
module_param(debug_quirks, uint, 0444);
|
|
|
|
MODULE_AUTHOR("Pierre Ossman <drzeus@drzeus.cx>");
|
|
MODULE_DESCRIPTION("Secure Digital Host Controller Interface driver");
|
|
MODULE_VERSION(DRIVER_VERSION);
|
|
MODULE_LICENSE("GPL");
|
|
|
|
MODULE_PARM_DESC(debug_nodma, "Forcefully disable DMA transfers. (default 0)");
|
|
MODULE_PARM_DESC(debug_forcedma, "Forcefully enable DMA transfers. (default 0)");
|
|
MODULE_PARM_DESC(debug_quirks, "Force certain quirks.");
|