6ba736a10e
When the device hits certain memory boundaries, it signals an interrupt and expects to be serviced. We don't need the feature but we need to make sure the device doesn't stall. Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
1544 lines
37 KiB
C
1544 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) 2005-2007 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 <asm/scatterlist.h>
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#include "sdhci.h"
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#define DRIVER_NAME "sdhci"
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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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#define SDHCI_QUIRK_SINGLE_POWER_WRITE (1<<3)
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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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{
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.vendor = PCI_VENDOR_ID_ENE,
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.device = PCI_DEVICE_ID_ENE_CB712_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_SINGLE_POWER_WRITE,
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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.\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_sg_to_buffer(struct sdhci_host* host)
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{
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return page_address(host->cur_sg->page) + host->cur_sg->offset;
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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_sg_to_buffer(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->remain, 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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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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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_sg_to_buffer(host);
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}
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}
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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_sg_to_buffer(host) + host->offset;
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while (blksize) {
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size = min(host->remain, 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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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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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_sg_to_buffer(host);
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}
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}
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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->num_sg == 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->num_sg == 0)
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break;
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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->mmc->max_blk_size);
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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->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.\n",
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mmc_hostname(host->mmc));
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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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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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*/
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if (data->error != MMC_ERR_NONE) {
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sdhci_reset(host, SDHCI_RESET_CMD);
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sdhci_reset(host, SDHCI_RESET_DATA);
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}
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sdhci_send_command(host, data->stop);
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} else
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tasklet_schedule(&host->finish_tasklet);
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}
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|
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static void sdhci_send_command(struct sdhci_host *host, struct mmc_command *cmd)
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{
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int flags;
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u32 mask;
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unsigned long timeout;
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|
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WARN_ON(host->cmd);
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DBG("Sending cmd (%x)\n", cmd->opcode);
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/* Wait max 10 ms */
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timeout = 10;
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mask = SDHCI_CMD_INHIBIT;
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if ((cmd->data != NULL) || (cmd->flags & MMC_RSP_BUSY))
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|
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).\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!\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;
|
|
u16 clk;
|
|
unsigned long timeout;
|
|
|
|
if (clock == host->clock)
|
|
return;
|
|
|
|
writew(0, host->ioaddr + SDHCI_CLOCK_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.\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;
|
|
|
|
if (power == (unsigned short)-1) {
|
|
writeb(0, host->ioaddr + SDHCI_POWER_CONTROL);
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* Spec says that we should clear the power reg before setting
|
|
* a new value. Some controllers don't seem to like this though.
|
|
*/
|
|
if (!(host->chip->quirks & SDHCI_QUIRK_SINGLE_POWER_WRITE))
|
|
writeb(0, host->ioaddr + SDHCI_POWER_CONTROL);
|
|
|
|
pwr = SDHCI_POWER_ON;
|
|
|
|
switch (1 << power) {
|
|
case MMC_VDD_165_195:
|
|
pwr |= SDHCI_POWER_180;
|
|
break;
|
|
case MMC_VDD_29_30:
|
|
case MMC_VDD_30_31:
|
|
pwr |= SDHCI_POWER_300;
|
|
break;
|
|
case MMC_VDD_32_33:
|
|
case MMC_VDD_33_34:
|
|
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;
|
|
|
|
if (ios->timing == MMC_TIMING_SD_HS)
|
|
ctrl |= SDHCI_CTRL_HISPD;
|
|
else
|
|
ctrl &= ~SDHCI_CTRL_HISPD;
|
|
|
|
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.\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));
|
|
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));
|
|
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);
|
|
|
|
/*
|
|
* We currently don't do anything fancy with DMA
|
|
* boundaries, but as we can't disable the feature
|
|
* we need to at least restart the transfer.
|
|
*/
|
|
if (intmask & SDHCI_INT_DMA_END)
|
|
writel(readl(host->ioaddr + SDHCI_DMA_ADDRESS),
|
|
host->ioaddr + SDHCI_DMA_ADDRESS);
|
|
|
|
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 || intmask == 0xffffffff) {
|
|
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.\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);
|
|
|
|
for (i = 0;i < chip->num_slots;i++) {
|
|
if (!chip->hosts[i])
|
|
continue;
|
|
free_irq(chip->hosts[i]->irq, chip->hosts[i]);
|
|
}
|
|
|
|
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);
|
|
ret = pci_enable_device(pdev);
|
|
if (ret)
|
|
return ret;
|
|
|
|
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);
|
|
ret = request_irq(chip->hosts[i]->irq, sdhci_irq,
|
|
IRQF_SHARED, chip->hosts[i]->slot_descr,
|
|
chip->hosts[i]);
|
|
if (ret)
|
|
return ret;
|
|
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;
|
|
|
|
/*
|
|
* 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;
|
|
|
|
if (caps & SDHCI_CAN_DO_HISPD)
|
|
mmc->caps |= MMC_CAP_SD_HIGHSPEED;
|
|
|
|
mmc->ocr_avail = 0;
|
|
if (caps & SDHCI_CAN_VDD_330)
|
|
mmc->ocr_avail |= MMC_VDD_32_33|MMC_VDD_33_34;
|
|
if (caps & SDHCI_CAN_VDD_300)
|
|
mmc->ocr_avail |= MMC_VDD_29_30|MMC_VDD_30_31;
|
|
if (caps & SDHCI_CAN_VDD_180)
|
|
mmc->ocr_avail |= MMC_VDD_165_195;
|
|
|
|
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).
|
|
*/
|
|
mmc->max_req_size = 524288;
|
|
|
|
/*
|
|
* Maximum segment size. Could be one segment with the maximum number
|
|
* of bytes.
|
|
*/
|
|
mmc->max_seg_size = mmc->max_req_size;
|
|
|
|
/*
|
|
* Maximum block size. This varies from controller to controller and
|
|
* is specified in the capabilities register.
|
|
*/
|
|
mmc->max_blk_size = (caps & SDHCI_MAX_BLOCK_MASK) >> SDHCI_MAX_BLOCK_SHIFT;
|
|
if (mmc->max_blk_size >= 3) {
|
|
printk(KERN_ERR "%s: Invalid maximum block size.\n",
|
|
host->slot_descr);
|
|
ret = -ENODEV;
|
|
goto unmap;
|
|
}
|
|
mmc->max_blk_size = 512 << mmc->max_blk_size;
|
|
|
|
/*
|
|
* Maximum block count.
|
|
*/
|
|
mmc->max_blk_count = 65535;
|
|
|
|
/*
|
|
* 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\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_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.");
|