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757 lines
17 KiB
757 lines
17 KiB
/* linux/drivers/mmc/host/sdhci-pci.c - SDHCI on PCI bus interface
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*
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* Copyright (C) 2005-2008 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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* Thanks to the following companies for their support:
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*
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* - JMicron (hardware and technical support)
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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 <asm/io.h>
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#include "sdhci.h"
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/*
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* PCI registers
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*/
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#define PCI_SDHCI_IFPIO 0x00
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#define PCI_SDHCI_IFDMA 0x01
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#define PCI_SDHCI_IFVENDOR 0x02
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#define PCI_SLOT_INFO 0x40 /* 8 bits */
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#define PCI_SLOT_INFO_SLOTS(x) ((x >> 4) & 7)
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#define PCI_SLOT_INFO_FIRST_BAR_MASK 0x07
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#define MAX_SLOTS 8
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struct sdhci_pci_chip;
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struct sdhci_pci_slot;
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struct sdhci_pci_fixes {
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unsigned int quirks;
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int (*probe)(struct sdhci_pci_chip*);
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int (*probe_slot)(struct sdhci_pci_slot*);
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void (*remove_slot)(struct sdhci_pci_slot*, int);
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int (*suspend)(struct sdhci_pci_chip*,
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pm_message_t);
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int (*resume)(struct sdhci_pci_chip*);
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};
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struct sdhci_pci_slot {
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struct sdhci_pci_chip *chip;
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struct sdhci_host *host;
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int pci_bar;
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};
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struct sdhci_pci_chip {
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struct pci_dev *pdev;
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unsigned int quirks;
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const struct sdhci_pci_fixes *fixes;
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int num_slots; /* Slots on controller */
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struct sdhci_pci_slot *slots[MAX_SLOTS]; /* Pointers to host slots */
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};
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/*****************************************************************************\
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* *
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* Hardware specific quirk handling *
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* *
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\*****************************************************************************/
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static int ricoh_probe(struct sdhci_pci_chip *chip)
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{
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if (chip->pdev->subsystem_vendor == PCI_VENDOR_ID_IBM)
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chip->quirks |= SDHCI_QUIRK_CLOCK_BEFORE_RESET;
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if (chip->pdev->subsystem_vendor == PCI_VENDOR_ID_SAMSUNG ||
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chip->pdev->subsystem_vendor == PCI_VENDOR_ID_SONY)
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chip->quirks |= SDHCI_QUIRK_NO_CARD_NO_RESET;
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return 0;
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}
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static const struct sdhci_pci_fixes sdhci_ricoh = {
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.probe = ricoh_probe,
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.quirks = SDHCI_QUIRK_32BIT_DMA_ADDR,
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};
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static const struct sdhci_pci_fixes sdhci_ene_712 = {
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.quirks = SDHCI_QUIRK_SINGLE_POWER_WRITE |
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SDHCI_QUIRK_BROKEN_DMA,
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};
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static const struct sdhci_pci_fixes sdhci_ene_714 = {
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.quirks = SDHCI_QUIRK_SINGLE_POWER_WRITE |
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SDHCI_QUIRK_RESET_CMD_DATA_ON_IOS |
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SDHCI_QUIRK_BROKEN_DMA,
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};
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static const struct sdhci_pci_fixes sdhci_cafe = {
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.quirks = SDHCI_QUIRK_NO_SIMULT_VDD_AND_POWER |
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SDHCI_QUIRK_NO_BUSY_IRQ |
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SDHCI_QUIRK_BROKEN_TIMEOUT_VAL,
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};
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static int jmicron_pmos(struct sdhci_pci_chip *chip, int on)
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{
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u8 scratch;
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int ret;
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ret = pci_read_config_byte(chip->pdev, 0xAE, &scratch);
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if (ret)
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return ret;
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/*
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* Turn PMOS on [bit 0], set over current detection to 2.4 V
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* [bit 1:2] and enable over current debouncing [bit 6].
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*/
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if (on)
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scratch |= 0x47;
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else
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scratch &= ~0x47;
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ret = pci_write_config_byte(chip->pdev, 0xAE, scratch);
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if (ret)
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return ret;
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return 0;
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}
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static int jmicron_probe(struct sdhci_pci_chip *chip)
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{
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int ret;
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if (chip->pdev->revision == 0) {
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chip->quirks |= SDHCI_QUIRK_32BIT_DMA_ADDR |
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SDHCI_QUIRK_32BIT_DMA_SIZE |
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SDHCI_QUIRK_32BIT_ADMA_SIZE |
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SDHCI_QUIRK_RESET_AFTER_REQUEST |
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SDHCI_QUIRK_BROKEN_SMALL_PIO;
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}
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/*
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* JMicron chips can have two interfaces to the same hardware
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* in order to work around limitations in Microsoft's driver.
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* We need to make sure we only bind to one of them.
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*
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* This code assumes two things:
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*
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* 1. The PCI code adds subfunctions in order.
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*
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* 2. The MMC interface has a lower subfunction number
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* than the SD interface.
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*/
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if (chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB38X_SD) {
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struct pci_dev *sd_dev;
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sd_dev = NULL;
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while ((sd_dev = pci_get_device(PCI_VENDOR_ID_JMICRON,
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PCI_DEVICE_ID_JMICRON_JMB38X_MMC, sd_dev)) != NULL) {
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if ((PCI_SLOT(chip->pdev->devfn) ==
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PCI_SLOT(sd_dev->devfn)) &&
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(chip->pdev->bus == sd_dev->bus))
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break;
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}
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if (sd_dev) {
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pci_dev_put(sd_dev);
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dev_info(&chip->pdev->dev, "Refusing to bind to "
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"secondary interface.\n");
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return -ENODEV;
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}
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}
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/*
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* JMicron chips need a bit of a nudge to enable the power
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* output pins.
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*/
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ret = jmicron_pmos(chip, 1);
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if (ret) {
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dev_err(&chip->pdev->dev, "Failure enabling card power\n");
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return ret;
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}
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return 0;
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}
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static void jmicron_enable_mmc(struct sdhci_host *host, int on)
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{
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u8 scratch;
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scratch = readb(host->ioaddr + 0xC0);
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if (on)
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scratch |= 0x01;
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else
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scratch &= ~0x01;
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writeb(scratch, host->ioaddr + 0xC0);
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}
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static int jmicron_probe_slot(struct sdhci_pci_slot *slot)
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{
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if (slot->chip->pdev->revision == 0) {
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u16 version;
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version = readl(slot->host->ioaddr + SDHCI_HOST_VERSION);
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version = (version & SDHCI_VENDOR_VER_MASK) >>
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SDHCI_VENDOR_VER_SHIFT;
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/*
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* Older versions of the chip have lots of nasty glitches
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* in the ADMA engine. It's best just to avoid it
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* completely.
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*/
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if (version < 0xAC)
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slot->host->quirks |= SDHCI_QUIRK_BROKEN_ADMA;
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}
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/*
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* The secondary interface requires a bit set to get the
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* interrupts.
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*/
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if (slot->chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB38X_MMC)
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jmicron_enable_mmc(slot->host, 1);
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return 0;
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}
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static void jmicron_remove_slot(struct sdhci_pci_slot *slot, int dead)
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{
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if (dead)
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return;
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if (slot->chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB38X_MMC)
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jmicron_enable_mmc(slot->host, 0);
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}
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static int jmicron_suspend(struct sdhci_pci_chip *chip, pm_message_t state)
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{
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int i;
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if (chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB38X_MMC) {
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for (i = 0;i < chip->num_slots;i++)
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jmicron_enable_mmc(chip->slots[i]->host, 0);
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}
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return 0;
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}
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static int jmicron_resume(struct sdhci_pci_chip *chip)
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{
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int ret, i;
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if (chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB38X_MMC) {
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for (i = 0;i < chip->num_slots;i++)
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jmicron_enable_mmc(chip->slots[i]->host, 1);
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}
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ret = jmicron_pmos(chip, 1);
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if (ret) {
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dev_err(&chip->pdev->dev, "Failure enabling card power\n");
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return ret;
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}
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return 0;
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}
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static const struct sdhci_pci_fixes sdhci_jmicron = {
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.probe = jmicron_probe,
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.probe_slot = jmicron_probe_slot,
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.remove_slot = jmicron_remove_slot,
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.suspend = jmicron_suspend,
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.resume = jmicron_resume,
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};
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static int via_probe(struct sdhci_pci_chip *chip)
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{
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if (chip->pdev->revision == 0x10)
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chip->quirks |= SDHCI_QUIRK_DELAY_AFTER_POWER;
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return 0;
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}
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static const struct sdhci_pci_fixes sdhci_via = {
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.probe = via_probe,
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};
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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_ANY_ID,
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.subdevice = PCI_ANY_ID,
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.driver_data = (kernel_ulong_t)&sdhci_ricoh,
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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 = (kernel_ulong_t)&sdhci_ene_712,
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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_2,
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.subvendor = PCI_ANY_ID,
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.subdevice = PCI_ANY_ID,
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.driver_data = (kernel_ulong_t)&sdhci_ene_712,
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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_CB714_SD,
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.subvendor = PCI_ANY_ID,
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.subdevice = PCI_ANY_ID,
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.driver_data = (kernel_ulong_t)&sdhci_ene_714,
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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_CB714_SD_2,
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.subvendor = PCI_ANY_ID,
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.subdevice = PCI_ANY_ID,
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.driver_data = (kernel_ulong_t)&sdhci_ene_714,
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},
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{
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.vendor = PCI_VENDOR_ID_MARVELL,
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.device = PCI_DEVICE_ID_MARVELL_88ALP01_SD,
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.subvendor = PCI_ANY_ID,
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.subdevice = PCI_ANY_ID,
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.driver_data = (kernel_ulong_t)&sdhci_cafe,
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},
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{
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.vendor = PCI_VENDOR_ID_JMICRON,
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.device = PCI_DEVICE_ID_JMICRON_JMB38X_SD,
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.subvendor = PCI_ANY_ID,
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.subdevice = PCI_ANY_ID,
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.driver_data = (kernel_ulong_t)&sdhci_jmicron,
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},
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{
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.vendor = PCI_VENDOR_ID_JMICRON,
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.device = PCI_DEVICE_ID_JMICRON_JMB38X_MMC,
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.subvendor = PCI_ANY_ID,
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.subdevice = PCI_ANY_ID,
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.driver_data = (kernel_ulong_t)&sdhci_jmicron,
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},
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{
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.vendor = PCI_VENDOR_ID_VIA,
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.device = 0x95d0,
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.subvendor = PCI_ANY_ID,
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.subdevice = PCI_ANY_ID,
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.driver_data = (kernel_ulong_t)&sdhci_via,
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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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/*****************************************************************************\
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* *
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* SDHCI core callbacks *
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* *
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\*****************************************************************************/
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static int sdhci_pci_enable_dma(struct sdhci_host *host)
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{
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struct sdhci_pci_slot *slot;
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struct pci_dev *pdev;
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int ret;
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slot = sdhci_priv(host);
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pdev = slot->chip->pdev;
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if (((pdev->class & 0xFFFF00) == (PCI_CLASS_SYSTEM_SDHCI << 8)) &&
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((pdev->class & 0x0000FF) != PCI_SDHCI_IFDMA) &&
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(host->flags & SDHCI_USE_SDMA)) {
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dev_warn(&pdev->dev, "Will use DMA mode even though HW "
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"doesn't fully claim to support it.\n");
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}
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ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
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if (ret)
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return ret;
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pci_set_master(pdev);
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return 0;
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}
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static struct sdhci_ops sdhci_pci_ops = {
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.enable_dma = sdhci_pci_enable_dma,
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};
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/*****************************************************************************\
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* *
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* Suspend/resume *
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* *
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\*****************************************************************************/
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#ifdef CONFIG_PM
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static int sdhci_pci_suspend (struct pci_dev *pdev, pm_message_t state)
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{
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struct sdhci_pci_chip *chip;
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struct sdhci_pci_slot *slot;
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int i, ret;
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chip = pci_get_drvdata(pdev);
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if (!chip)
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return 0;
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for (i = 0;i < chip->num_slots;i++) {
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slot = chip->slots[i];
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if (!slot)
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continue;
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ret = sdhci_suspend_host(slot->host, state);
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if (ret) {
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for (i--;i >= 0;i--)
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sdhci_resume_host(chip->slots[i]->host);
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return ret;
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}
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}
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if (chip->fixes && chip->fixes->suspend) {
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ret = chip->fixes->suspend(chip, state);
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if (ret) {
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for (i = chip->num_slots - 1;i >= 0;i--)
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sdhci_resume_host(chip->slots[i]->host);
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return ret;
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}
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}
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pci_save_state(pdev);
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pci_enable_wake(pdev, pci_choose_state(pdev, state), 0);
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pci_disable_device(pdev);
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pci_set_power_state(pdev, pci_choose_state(pdev, state));
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return 0;
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}
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static int sdhci_pci_resume (struct pci_dev *pdev)
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{
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struct sdhci_pci_chip *chip;
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struct sdhci_pci_slot *slot;
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int i, ret;
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chip = pci_get_drvdata(pdev);
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if (!chip)
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return 0;
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pci_set_power_state(pdev, PCI_D0);
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pci_restore_state(pdev);
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ret = pci_enable_device(pdev);
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if (ret)
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return ret;
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if (chip->fixes && chip->fixes->resume) {
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ret = chip->fixes->resume(chip);
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if (ret)
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return ret;
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}
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for (i = 0;i < chip->num_slots;i++) {
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slot = chip->slots[i];
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if (!slot)
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continue;
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ret = sdhci_resume_host(slot->host);
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if (ret)
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return ret;
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}
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return 0;
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}
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#else /* CONFIG_PM */
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#define sdhci_pci_suspend NULL
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#define sdhci_pci_resume NULL
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#endif /* CONFIG_PM */
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/*****************************************************************************\
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* *
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* Device probing/removal *
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* *
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\*****************************************************************************/
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static struct sdhci_pci_slot * __devinit sdhci_pci_probe_slot(
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struct pci_dev *pdev, struct sdhci_pci_chip *chip, int bar)
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{
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struct sdhci_pci_slot *slot;
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struct sdhci_host *host;
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resource_size_t addr;
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int ret;
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if (!(pci_resource_flags(pdev, bar) & IORESOURCE_MEM)) {
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dev_err(&pdev->dev, "BAR %d is not iomem. Aborting.\n", bar);
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return ERR_PTR(-ENODEV);
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}
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if (pci_resource_len(pdev, bar) != 0x100) {
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dev_err(&pdev->dev, "Invalid iomem size. You may "
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"experience problems.\n");
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}
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if ((pdev->class & 0x0000FF) == PCI_SDHCI_IFVENDOR) {
|
|
dev_err(&pdev->dev, "Vendor specific interface. Aborting.\n");
|
|
return ERR_PTR(-ENODEV);
|
|
}
|
|
|
|
if ((pdev->class & 0x0000FF) > PCI_SDHCI_IFVENDOR) {
|
|
dev_err(&pdev->dev, "Unknown interface. Aborting.\n");
|
|
return ERR_PTR(-ENODEV);
|
|
}
|
|
|
|
host = sdhci_alloc_host(&pdev->dev, sizeof(struct sdhci_pci_slot));
|
|
if (IS_ERR(host)) {
|
|
dev_err(&pdev->dev, "cannot allocate host\n");
|
|
return ERR_PTR(PTR_ERR(host));
|
|
}
|
|
|
|
slot = sdhci_priv(host);
|
|
|
|
slot->chip = chip;
|
|
slot->host = host;
|
|
slot->pci_bar = bar;
|
|
|
|
host->hw_name = "PCI";
|
|
host->ops = &sdhci_pci_ops;
|
|
host->quirks = chip->quirks;
|
|
|
|
host->irq = pdev->irq;
|
|
|
|
ret = pci_request_region(pdev, bar, mmc_hostname(host->mmc));
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "cannot request region\n");
|
|
goto free;
|
|
}
|
|
|
|
addr = pci_resource_start(pdev, bar);
|
|
host->ioaddr = pci_ioremap_bar(pdev, bar);
|
|
if (!host->ioaddr) {
|
|
dev_err(&pdev->dev, "failed to remap registers\n");
|
|
goto release;
|
|
}
|
|
|
|
if (chip->fixes && chip->fixes->probe_slot) {
|
|
ret = chip->fixes->probe_slot(slot);
|
|
if (ret)
|
|
goto unmap;
|
|
}
|
|
|
|
ret = sdhci_add_host(host);
|
|
if (ret)
|
|
goto remove;
|
|
|
|
return slot;
|
|
|
|
remove:
|
|
if (chip->fixes && chip->fixes->remove_slot)
|
|
chip->fixes->remove_slot(slot, 0);
|
|
|
|
unmap:
|
|
iounmap(host->ioaddr);
|
|
|
|
release:
|
|
pci_release_region(pdev, bar);
|
|
|
|
free:
|
|
sdhci_free_host(host);
|
|
|
|
return ERR_PTR(ret);
|
|
}
|
|
|
|
static void sdhci_pci_remove_slot(struct sdhci_pci_slot *slot)
|
|
{
|
|
int dead;
|
|
u32 scratch;
|
|
|
|
dead = 0;
|
|
scratch = readl(slot->host->ioaddr + SDHCI_INT_STATUS);
|
|
if (scratch == (u32)-1)
|
|
dead = 1;
|
|
|
|
sdhci_remove_host(slot->host, dead);
|
|
|
|
if (slot->chip->fixes && slot->chip->fixes->remove_slot)
|
|
slot->chip->fixes->remove_slot(slot, dead);
|
|
|
|
pci_release_region(slot->chip->pdev, slot->pci_bar);
|
|
|
|
sdhci_free_host(slot->host);
|
|
}
|
|
|
|
static int __devinit sdhci_pci_probe(struct pci_dev *pdev,
|
|
const struct pci_device_id *ent)
|
|
{
|
|
struct sdhci_pci_chip *chip;
|
|
struct sdhci_pci_slot *slot;
|
|
|
|
u8 slots, rev, first_bar;
|
|
int ret, i;
|
|
|
|
BUG_ON(pdev == NULL);
|
|
BUG_ON(ent == NULL);
|
|
|
|
pci_read_config_byte(pdev, PCI_CLASS_REVISION, &rev);
|
|
|
|
dev_info(&pdev->dev, "SDHCI controller found [%04x:%04x] (rev %x)\n",
|
|
(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;
|
|
dev_dbg(&pdev->dev, "found %d slot(s)\n", slots);
|
|
if (slots == 0)
|
|
return -ENODEV;
|
|
|
|
BUG_ON(slots > MAX_SLOTS);
|
|
|
|
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) {
|
|
dev_err(&pdev->dev, "Invalid first BAR. Aborting.\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
ret = pci_enable_device(pdev);
|
|
if (ret)
|
|
return ret;
|
|
|
|
chip = kzalloc(sizeof(struct sdhci_pci_chip), GFP_KERNEL);
|
|
if (!chip) {
|
|
ret = -ENOMEM;
|
|
goto err;
|
|
}
|
|
|
|
chip->pdev = pdev;
|
|
chip->fixes = (const struct sdhci_pci_fixes*)ent->driver_data;
|
|
if (chip->fixes)
|
|
chip->quirks = chip->fixes->quirks;
|
|
chip->num_slots = slots;
|
|
|
|
pci_set_drvdata(pdev, chip);
|
|
|
|
if (chip->fixes && chip->fixes->probe) {
|
|
ret = chip->fixes->probe(chip);
|
|
if (ret)
|
|
goto free;
|
|
}
|
|
|
|
for (i = 0;i < slots;i++) {
|
|
slot = sdhci_pci_probe_slot(pdev, chip, first_bar + i);
|
|
if (IS_ERR(slot)) {
|
|
for (i--;i >= 0;i--)
|
|
sdhci_pci_remove_slot(chip->slots[i]);
|
|
ret = PTR_ERR(slot);
|
|
goto free;
|
|
}
|
|
|
|
chip->slots[i] = slot;
|
|
}
|
|
|
|
return 0;
|
|
|
|
free:
|
|
pci_set_drvdata(pdev, NULL);
|
|
kfree(chip);
|
|
|
|
err:
|
|
pci_disable_device(pdev);
|
|
return ret;
|
|
}
|
|
|
|
static void __devexit sdhci_pci_remove(struct pci_dev *pdev)
|
|
{
|
|
int i;
|
|
struct sdhci_pci_chip *chip;
|
|
|
|
chip = pci_get_drvdata(pdev);
|
|
|
|
if (chip) {
|
|
for (i = 0;i < chip->num_slots; i++)
|
|
sdhci_pci_remove_slot(chip->slots[i]);
|
|
|
|
pci_set_drvdata(pdev, NULL);
|
|
kfree(chip);
|
|
}
|
|
|
|
pci_disable_device(pdev);
|
|
}
|
|
|
|
static struct pci_driver sdhci_driver = {
|
|
.name = "sdhci-pci",
|
|
.id_table = pci_ids,
|
|
.probe = sdhci_pci_probe,
|
|
.remove = __devexit_p(sdhci_pci_remove),
|
|
.suspend = sdhci_pci_suspend,
|
|
.resume = sdhci_pci_resume,
|
|
};
|
|
|
|
/*****************************************************************************\
|
|
* *
|
|
* Driver init/exit *
|
|
* *
|
|
\*****************************************************************************/
|
|
|
|
static int __init sdhci_drv_init(void)
|
|
{
|
|
return pci_register_driver(&sdhci_driver);
|
|
}
|
|
|
|
static void __exit sdhci_drv_exit(void)
|
|
{
|
|
pci_unregister_driver(&sdhci_driver);
|
|
}
|
|
|
|
module_init(sdhci_drv_init);
|
|
module_exit(sdhci_drv_exit);
|
|
|
|
MODULE_AUTHOR("Pierre Ossman <pierre@ossman.eu>");
|
|
MODULE_DESCRIPTION("Secure Digital Host Controller Interface PCI driver");
|
|
MODULE_LICENSE("GPL");
|
|
|