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mmc: Driver for CB710/720 memory card reader (MMC part)
The code is divided in two parts. There is a virtual 'bus' driver that handles PCI device and registers three new devices one per card reader type. The other driver handles SD/MMC part of the reader. Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl> Signed-off-by: Pierre Ossman <pierre@ossman.eu>
This commit is contained in:
Michał Mirosław
Pierre Ossman
parent
8385f9cb7f
commit
5f5bac8272
@ -2105,6 +2105,15 @@ W: http://sourceforge.net/projects/lpfcxxxx
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S: Supported
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F: drivers/scsi/lpfc/
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ENE CB710 FLASH CARD READER DRIVER
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P: Michał Mirosław
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M: mirq-linux@rere.qmqm.pl
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L: linux-kernel@vger.kernel.org
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S: Maintained
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F: drivers/misc/cb710/
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F: drivers/mmc/host/cb710-mmc.*
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F: include/linux/cb710.h
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EPSON 1355 FRAMEBUFFER DRIVER
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P: Christopher Hoover
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M: ch@murgatroid.com
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@ -235,5 +235,6 @@ config ISL29003
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source "drivers/misc/c2port/Kconfig"
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source "drivers/misc/eeprom/Kconfig"
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source "drivers/misc/cb710/Kconfig"
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endif # MISC_DEVICES
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@ -21,3 +21,4 @@ obj-$(CONFIG_HP_ILO) += hpilo.o
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obj-$(CONFIG_ISL29003) += isl29003.o
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obj-$(CONFIG_C2PORT) += c2port/
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obj-y += eeprom/
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obj-y += cb710/
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21
drivers/misc/cb710/Kconfig
Normal file
21
drivers/misc/cb710/Kconfig
Normal file
@ -0,0 +1,21 @@
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config CB710_CORE
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tristate "ENE CB710/720 Flash memory card reader support"
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depends on PCI
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help
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This option enables support for PCI ENE CB710/720 Flash memory card
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reader found in some laptops (ie. some versions of HP Compaq nx9500).
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You will also have to select some flash card format drivers (MMC/SD,
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MemoryStick).
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This driver can also be built as a module. If so, the module
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will be called cb710.
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config CB710_DEBUG
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bool "Enable driver debugging"
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depends on CB710_CORE != n
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default n
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help
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This is an option for use by developers; most people should
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say N here. This adds a lot of debugging output to dmesg.
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4
drivers/misc/cb710/Makefile
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4
drivers/misc/cb710/Makefile
Normal file
@ -0,0 +1,4 @@
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obj-$(CONFIG_CB710_CORE) += cb710.o
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cb710-y := core.o sgbuf2.o
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cb710-$(CONFIG_CB710_DEBUG) += debug.o
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357
drivers/misc/cb710/core.c
Normal file
357
drivers/misc/cb710/core.c
Normal file
@ -0,0 +1,357 @@
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/*
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* cb710/core.c
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*
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* Copyright by Michał Mirosław, 2008-2009
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/pci.h>
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#include <linux/spinlock.h>
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#include <linux/idr.h>
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#include <linux/cb710.h>
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static DEFINE_IDA(cb710_ida);
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static DEFINE_SPINLOCK(cb710_ida_lock);
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void cb710_pci_update_config_reg(struct pci_dev *pdev,
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int reg, uint32_t mask, uint32_t xor)
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{
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u32 rval;
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pci_read_config_dword(pdev, reg, &rval);
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rval = (rval & mask) ^ xor;
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pci_write_config_dword(pdev, reg, rval);
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}
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EXPORT_SYMBOL_GPL(cb710_pci_update_config_reg);
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/* Some magic writes based on Windows driver init code */
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static int __devinit cb710_pci_configure(struct pci_dev *pdev)
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{
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unsigned int devfn = PCI_DEVFN(PCI_SLOT(pdev->devfn), 0);
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struct pci_dev *pdev0 = pci_get_slot(pdev->bus, devfn);
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u32 val;
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cb710_pci_update_config_reg(pdev, 0x48,
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~0x000000FF, 0x0000003F);
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pci_read_config_dword(pdev, 0x48, &val);
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if (val & 0x80000000)
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return 0;
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if (!pdev0)
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return -ENODEV;
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if (pdev0->vendor == PCI_VENDOR_ID_ENE
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&& pdev0->device == PCI_DEVICE_ID_ENE_720) {
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cb710_pci_update_config_reg(pdev0, 0x8C,
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~0x00F00000, 0x00100000);
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cb710_pci_update_config_reg(pdev0, 0xB0,
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~0x08000000, 0x08000000);
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}
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cb710_pci_update_config_reg(pdev0, 0x8C,
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~0x00000F00, 0x00000200);
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cb710_pci_update_config_reg(pdev0, 0x90,
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~0x00060000, 0x00040000);
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pci_dev_put(pdev0);
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return 0;
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}
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static irqreturn_t cb710_irq_handler(int irq, void *data)
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{
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struct cb710_chip *chip = data;
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struct cb710_slot *slot = &chip->slot[0];
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irqreturn_t handled = IRQ_NONE;
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unsigned nr;
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spin_lock(&chip->irq_lock); /* incl. smp_rmb() */
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for (nr = chip->slots; nr; ++slot, --nr) {
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cb710_irq_handler_t handler_func = slot->irq_handler;
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if (handler_func && handler_func(slot))
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handled = IRQ_HANDLED;
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}
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spin_unlock(&chip->irq_lock);
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return handled;
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}
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static void cb710_release_slot(struct device *dev)
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{
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#ifdef CONFIG_CB710_DEBUG_ASSUMPTIONS
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struct cb710_slot *slot = cb710_pdev_to_slot(to_platform_device(dev));
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struct cb710_chip *chip = cb710_slot_to_chip(slot);
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/* slot struct can be freed now */
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atomic_dec(&chip->slot_refs_count);
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#endif
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}
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static int __devinit cb710_register_slot(struct cb710_chip *chip,
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unsigned slot_mask, unsigned io_offset, const char *name)
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{
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int nr = chip->slots;
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struct cb710_slot *slot = &chip->slot[nr];
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int err;
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dev_dbg(cb710_chip_dev(chip),
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"register: %s.%d; slot %d; mask %d; IO offset: 0x%02X\n",
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name, chip->platform_id, nr, slot_mask, io_offset);
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/* slot->irq_handler == NULL here; this needs to be
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* seen before platform_device_register() */
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++chip->slots;
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smp_wmb();
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slot->iobase = chip->iobase + io_offset;
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slot->pdev.name = name;
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slot->pdev.id = chip->platform_id;
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slot->pdev.dev.parent = &chip->pdev->dev;
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slot->pdev.dev.release = cb710_release_slot;
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err = platform_device_register(&slot->pdev);
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#ifdef CONFIG_CB710_DEBUG_ASSUMPTIONS
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atomic_inc(&chip->slot_refs_count);
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#endif
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if (err) {
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/* device_initialize() called from platform_device_register()
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* wants this on error path */
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platform_device_put(&slot->pdev);
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/* slot->irq_handler == NULL here anyway, so no lock needed */
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--chip->slots;
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return err;
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}
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chip->slot_mask |= slot_mask;
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return 0;
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}
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static void cb710_unregister_slot(struct cb710_chip *chip,
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unsigned slot_mask)
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{
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int nr = chip->slots - 1;
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if (!(chip->slot_mask & slot_mask))
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return;
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platform_device_unregister(&chip->slot[nr].pdev);
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/* complementary to spin_unlock() in cb710_set_irq_handler() */
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smp_rmb();
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BUG_ON(chip->slot[nr].irq_handler != NULL);
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/* slot->irq_handler == NULL here, so no lock needed */
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--chip->slots;
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chip->slot_mask &= ~slot_mask;
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}
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void cb710_set_irq_handler(struct cb710_slot *slot,
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cb710_irq_handler_t handler)
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{
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struct cb710_chip *chip = cb710_slot_to_chip(slot);
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unsigned long flags;
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spin_lock_irqsave(&chip->irq_lock, flags);
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slot->irq_handler = handler;
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spin_unlock_irqrestore(&chip->irq_lock, flags);
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}
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EXPORT_SYMBOL_GPL(cb710_set_irq_handler);
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#ifdef CONFIG_PM
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static int cb710_suspend(struct pci_dev *pdev, pm_message_t state)
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{
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struct cb710_chip *chip = pci_get_drvdata(pdev);
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free_irq(pdev->irq, chip);
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pci_save_state(pdev);
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pci_disable_device(pdev);
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if (state.event & PM_EVENT_SLEEP)
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pci_set_power_state(pdev, PCI_D3cold);
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return 0;
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}
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static int cb710_resume(struct pci_dev *pdev)
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{
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struct cb710_chip *chip = pci_get_drvdata(pdev);
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int err;
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pci_set_power_state(pdev, PCI_D0);
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pci_restore_state(pdev);
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err = pcim_enable_device(pdev);
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if (err)
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return err;
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return devm_request_irq(&pdev->dev, pdev->irq,
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cb710_irq_handler, IRQF_SHARED, KBUILD_MODNAME, chip);
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}
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#endif /* CONFIG_PM */
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static int __devinit cb710_probe(struct pci_dev *pdev,
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const struct pci_device_id *ent)
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{
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struct cb710_chip *chip;
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unsigned long flags;
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u32 val;
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int err;
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int n = 0;
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err = cb710_pci_configure(pdev);
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if (err)
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return err;
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/* this is actually magic... */
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pci_read_config_dword(pdev, 0x48, &val);
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if (!(val & 0x80000000)) {
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pci_write_config_dword(pdev, 0x48, val|0x71000000);
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pci_read_config_dword(pdev, 0x48, &val);
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}
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dev_dbg(&pdev->dev, "PCI config[0x48] = 0x%08X\n", val);
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if (!(val & 0x70000000))
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return -ENODEV;
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val = (val >> 28) & 7;
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if (val & CB710_SLOT_MMC)
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++n;
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if (val & CB710_SLOT_MS)
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++n;
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if (val & CB710_SLOT_SM)
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++n;
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chip = devm_kzalloc(&pdev->dev,
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sizeof(*chip) + n * sizeof(*chip->slot), GFP_KERNEL);
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if (!chip)
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return -ENOMEM;
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err = pcim_enable_device(pdev);
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if (err)
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return err;
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err = pcim_iomap_regions(pdev, 0x0001, KBUILD_MODNAME);
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if (err)
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return err;
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chip->pdev = pdev;
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chip->iobase = pcim_iomap_table(pdev)[0];
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pci_set_drvdata(pdev, chip);
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err = devm_request_irq(&pdev->dev, pdev->irq,
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cb710_irq_handler, IRQF_SHARED, KBUILD_MODNAME, chip);
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if (err)
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return err;
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do {
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if (!ida_pre_get(&cb710_ida, GFP_KERNEL))
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return -ENOMEM;
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spin_lock_irqsave(&cb710_ida_lock, flags);
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err = ida_get_new(&cb710_ida, &chip->platform_id);
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spin_unlock_irqrestore(&cb710_ida_lock, flags);
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if (err && err != -EAGAIN)
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return err;
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} while (err);
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dev_info(&pdev->dev, "id %d, IO 0x%p, IRQ %d\n",
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chip->platform_id, chip->iobase, pdev->irq);
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if (val & CB710_SLOT_MMC) { /* MMC/SD slot */
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err = cb710_register_slot(chip,
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CB710_SLOT_MMC, 0x00, "cb710-mmc");
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if (err)
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return err;
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}
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if (val & CB710_SLOT_MS) { /* MemoryStick slot */
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err = cb710_register_slot(chip,
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CB710_SLOT_MS, 0x40, "cb710-ms");
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if (err)
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goto unreg_mmc;
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}
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if (val & CB710_SLOT_SM) { /* SmartMedia slot */
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err = cb710_register_slot(chip,
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CB710_SLOT_SM, 0x60, "cb710-sm");
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if (err)
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goto unreg_ms;
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}
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return 0;
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unreg_ms:
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cb710_unregister_slot(chip, CB710_SLOT_MS);
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unreg_mmc:
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cb710_unregister_slot(chip, CB710_SLOT_MMC);
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#ifdef CONFIG_CB710_DEBUG_ASSUMPTIONS
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BUG_ON(atomic_read(&chip->slot_refs_count) != 0);
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#endif
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return err;
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}
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static void __devexit cb710_remove_one(struct pci_dev *pdev)
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{
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struct cb710_chip *chip = pci_get_drvdata(pdev);
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unsigned long flags;
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cb710_unregister_slot(chip, CB710_SLOT_SM);
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cb710_unregister_slot(chip, CB710_SLOT_MS);
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cb710_unregister_slot(chip, CB710_SLOT_MMC);
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#ifdef CONFIG_CB710_DEBUG_ASSUMPTIONS
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BUG_ON(atomic_read(&chip->slot_refs_count) != 0);
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#endif
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spin_lock_irqsave(&cb710_ida_lock, flags);
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ida_remove(&cb710_ida, chip->platform_id);
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spin_unlock_irqrestore(&cb710_ida_lock, flags);
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}
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static const struct pci_device_id cb710_pci_tbl[] = {
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{ PCI_VENDOR_ID_ENE, PCI_DEVICE_ID_ENE_CB710_FLASH,
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PCI_ANY_ID, PCI_ANY_ID, },
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{ 0, }
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};
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static struct pci_driver cb710_driver = {
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.name = KBUILD_MODNAME,
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.id_table = cb710_pci_tbl,
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.probe = cb710_probe,
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.remove = __devexit_p(cb710_remove_one),
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#ifdef CONFIG_PM
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.suspend = cb710_suspend,
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.resume = cb710_resume,
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#endif
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};
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static int __init cb710_init_module(void)
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{
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return pci_register_driver(&cb710_driver);
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}
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static void __exit cb710_cleanup_module(void)
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{
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pci_unregister_driver(&cb710_driver);
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ida_destroy(&cb710_ida);
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}
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module_init(cb710_init_module);
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module_exit(cb710_cleanup_module);
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MODULE_AUTHOR("Michał Mirosław <mirq-linux@rere.qmqm.pl>");
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MODULE_DESCRIPTION("ENE CB710 memory card reader driver");
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MODULE_LICENSE("GPL");
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MODULE_DEVICE_TABLE(pci, cb710_pci_tbl);
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119
drivers/misc/cb710/debug.c
Normal file
119
drivers/misc/cb710/debug.c
Normal file
@ -0,0 +1,119 @@
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/*
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* cb710/debug.c
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*
|
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* Copyright by Michał Mirosław, 2008-2009
|
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*
|
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* This program is free software; you can redistribute it and/or modify
|
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* it under the terms of the GNU General Public License version 2 as
|
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* published by the Free Software Foundation.
|
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*/
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#include <linux/cb710.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#define CB710_REG_COUNT 0x80
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static const u16 allow[CB710_REG_COUNT/16] = {
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0xFFF0, 0xFFFF, 0xFFFF, 0xFFFF,
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0xFFF0, 0xFFFF, 0xFFFF, 0xFFFF,
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};
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static const char *const prefix[ARRAY_SIZE(allow)] = {
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"MMC", "MMC", "MMC", "MMC",
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"MS?", "MS?", "SM?", "SM?"
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};
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static inline int allow_reg_read(unsigned block, unsigned offset, unsigned bits)
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{
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unsigned mask = (1 << bits/8) - 1;
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offset *= bits/8;
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return ((allow[block] >> offset) & mask) == mask;
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}
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#define CB710_READ_REGS_TEMPLATE(t) \
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static void cb710_read_regs_##t(void __iomem *iobase, \
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u##t *reg, unsigned select) \
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{ \
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unsigned i, j; \
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\
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for (i = 0; i < ARRAY_SIZE(allow); ++i, reg += 16/(t/8)) { \
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if (!select & (1 << i)) \
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continue; \
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\
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for (j = 0; j < 0x10/(t/8); ++j) { \
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if (!allow_reg_read(i, j, t)) \
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||||
continue; \
|
||||
reg[j] = ioread##t(iobase \
|
||||
+ (i << 4) + (j * (t/8))); \
|
||||
} \
|
||||
} \
|
||||
}
|
||||
|
||||
static const char cb710_regf_8[] = "%02X";
|
||||
static const char cb710_regf_16[] = "%04X";
|
||||
static const char cb710_regf_32[] = "%08X";
|
||||
static const char cb710_xes[] = "xxxxxxxx";
|
||||
|
||||
#define CB710_DUMP_REGS_TEMPLATE(t) \
|
||||
static void cb710_dump_regs_##t(struct device *dev, \
|
||||
const u##t *reg, unsigned select) \
|
||||
{ \
|
||||
const char *const xp = &cb710_xes[8 - t/4]; \
|
||||
const char *const format = cb710_regf_##t; \
|
||||
\
|
||||
char msg[100], *p; \
|
||||
unsigned i, j; \
|
||||
\
|
||||
for (i = 0; i < ARRAY_SIZE(allow); ++i, reg += 16/(t/8)) { \
|
||||
if (!(select & (1 << i))) \
|
||||
continue; \
|
||||
p = msg; \
|
||||
for (j = 0; j < 0x10/(t/8); ++j) { \
|
||||
*p++ = ' '; \
|
||||
if (j == 8/(t/8)) \
|
||||
*p++ = ' '; \
|
||||
if (allow_reg_read(i, j, t)) \
|
||||
p += sprintf(p, format, reg[j]); \
|
||||
else \
|
||||
p += sprintf(p, "%s", xp); \
|
||||
} \
|
||||
dev_dbg(dev, "%s 0x%02X %s\n", prefix[i], i << 4, msg); \
|
||||
} \
|
||||
}
|
||||
|
||||
#define CB710_READ_AND_DUMP_REGS_TEMPLATE(t) \
|
||||
static void cb710_read_and_dump_regs_##t(struct cb710_chip *chip, \
|
||||
unsigned select) \
|
||||
{ \
|
||||
u##t regs[CB710_REG_COUNT/sizeof(u##t)]; \
|
||||
\
|
||||
memset(®s, 0, sizeof(regs)); \
|
||||
cb710_read_regs_##t(chip->iobase, regs, select); \
|
||||
cb710_dump_regs_##t(cb710_chip_dev(chip), regs, select); \
|
||||
}
|
||||
|
||||
#define CB710_REG_ACCESS_TEMPLATES(t) \
|
||||
CB710_READ_REGS_TEMPLATE(t) \
|
||||
CB710_DUMP_REGS_TEMPLATE(t) \
|
||||
CB710_READ_AND_DUMP_REGS_TEMPLATE(t)
|
||||
|
||||
CB710_REG_ACCESS_TEMPLATES(8)
|
||||
CB710_REG_ACCESS_TEMPLATES(16)
|
||||
CB710_REG_ACCESS_TEMPLATES(32)
|
||||
|
||||
void cb710_dump_regs(struct cb710_chip *chip, unsigned select)
|
||||
{
|
||||
if (!(select & CB710_DUMP_REGS_MASK))
|
||||
select = CB710_DUMP_REGS_ALL;
|
||||
if (!(select & CB710_DUMP_ACCESS_MASK))
|
||||
select |= CB710_DUMP_ACCESS_8;
|
||||
|
||||
if (select & CB710_DUMP_ACCESS_32)
|
||||
cb710_read_and_dump_regs_32(chip, select);
|
||||
if (select & CB710_DUMP_ACCESS_16)
|
||||
cb710_read_and_dump_regs_16(chip, select);
|
||||
if (select & CB710_DUMP_ACCESS_8)
|
||||
cb710_read_and_dump_regs_8(chip, select);
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(cb710_dump_regs);
|
||||
|
||||
150
drivers/misc/cb710/sgbuf2.c
Normal file
150
drivers/misc/cb710/sgbuf2.c
Normal file
@ -0,0 +1,150 @@
|
||||
/*
|
||||
* cb710/sgbuf2.c
|
||||
*
|
||||
* Copyright by Michał Mirosław, 2008-2009
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License version 2 as
|
||||
* published by the Free Software Foundation.
|
||||
*/
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/cb710.h>
|
||||
|
||||
static bool sg_dwiter_next(struct sg_mapping_iter *miter)
|
||||
{
|
||||
if (sg_miter_next(miter)) {
|
||||
miter->consumed = 0;
|
||||
return true;
|
||||
} else
|
||||
return false;
|
||||
}
|
||||
|
||||
static bool sg_dwiter_is_at_end(struct sg_mapping_iter *miter)
|
||||
{
|
||||
return miter->length == miter->consumed && !sg_dwiter_next(miter);
|
||||
}
|
||||
|
||||
static uint32_t sg_dwiter_read_buffer(struct sg_mapping_iter *miter)
|
||||
{
|
||||
size_t len, left = 4;
|
||||
uint32_t data;
|
||||
void *addr = &data;
|
||||
|
||||
do {
|
||||
len = min(miter->length - miter->consumed, left);
|
||||
memcpy(addr, miter->addr + miter->consumed, len);
|
||||
miter->consumed += len;
|
||||
left -= len;
|
||||
if (!left)
|
||||
return data;
|
||||
addr += len;
|
||||
} while (sg_dwiter_next(miter));
|
||||
|
||||
memset(addr, 0, left);
|
||||
return data;
|
||||
}
|
||||
|
||||
static inline bool needs_unaligned_copy(const void *ptr)
|
||||
{
|
||||
#ifdef HAVE_EFFICIENT_UNALIGNED_ACCESS
|
||||
return false;
|
||||
#else
|
||||
return ((ptr - NULL) & 3) != 0;
|
||||
#endif
|
||||
}
|
||||
|
||||
static bool sg_dwiter_get_next_block(struct sg_mapping_iter *miter, uint32_t **ptr)
|
||||
{
|
||||
size_t len;
|
||||
|
||||
if (sg_dwiter_is_at_end(miter))
|
||||
return true;
|
||||
|
||||
len = miter->length - miter->consumed;
|
||||
|
||||
if (likely(len >= 4 && !needs_unaligned_copy(
|
||||
miter->addr + miter->consumed))) {
|
||||
*ptr = miter->addr + miter->consumed;
|
||||
miter->consumed += 4;
|
||||
return true;
|
||||
}
|
||||
|
||||
return false;
|
||||
}
|
||||
|
||||
/**
|
||||
* cb710_sg_dwiter_read_next_block() - get next 32-bit word from sg buffer
|
||||
* @miter: sg mapping iterator used for reading
|
||||
*
|
||||
* Description:
|
||||
* Returns 32-bit word starting at byte pointed to by @miter@
|
||||
* handling any alignment issues. Bytes past the buffer's end
|
||||
* are not accessed (read) but are returned as zeroes. @miter@
|
||||
* is advanced by 4 bytes or to the end of buffer whichever is
|
||||
* closer.
|
||||
*
|
||||
* Context:
|
||||
* Same requirements as in sg_miter_next().
|
||||
*
|
||||
* Returns:
|
||||
* 32-bit word just read.
|
||||
*/
|
||||
uint32_t cb710_sg_dwiter_read_next_block(struct sg_mapping_iter *miter)
|
||||
{
|
||||
uint32_t *ptr = NULL;
|
||||
|
||||
if (likely(sg_dwiter_get_next_block(miter, &ptr)))
|
||||
return ptr ? *ptr : 0;
|
||||
|
||||
return sg_dwiter_read_buffer(miter);
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(cb710_sg_dwiter_read_next_block);
|
||||
|
||||
static void sg_dwiter_write_slow(struct sg_mapping_iter *miter, uint32_t data)
|
||||
{
|
||||
size_t len, left = 4;
|
||||
void *addr = &data;
|
||||
|
||||
do {
|
||||
len = min(miter->length - miter->consumed, left);
|
||||
memcpy(miter->addr, addr, len);
|
||||
miter->consumed += len;
|
||||
left -= len;
|
||||
if (!left)
|
||||
return;
|
||||
addr += len;
|
||||
flush_kernel_dcache_page(miter->page);
|
||||
} while (sg_dwiter_next(miter));
|
||||
}
|
||||
|
||||
/**
|
||||
* cb710_sg_dwiter_write_next_block() - write next 32-bit word to sg buffer
|
||||
* @miter: sg mapping iterator used for writing
|
||||
*
|
||||
* Description:
|
||||
* Writes 32-bit word starting at byte pointed to by @miter@
|
||||
* handling any alignment issues. Bytes which would be written
|
||||
* past the buffer's end are silently discarded. @miter@ is
|
||||
* advanced by 4 bytes or to the end of buffer whichever is closer.
|
||||
*
|
||||
* Context:
|
||||
* Same requirements as in sg_miter_next().
|
||||
*/
|
||||
void cb710_sg_dwiter_write_next_block(struct sg_mapping_iter *miter, uint32_t data)
|
||||
{
|
||||
uint32_t *ptr = NULL;
|
||||
|
||||
if (likely(sg_dwiter_get_next_block(miter, &ptr))) {
|
||||
if (ptr)
|
||||
*ptr = data;
|
||||
else
|
||||
return;
|
||||
} else
|
||||
sg_dwiter_write_slow(miter, data);
|
||||
|
||||
if (miter->length == miter->consumed)
|
||||
flush_kernel_dcache_page(miter->page);
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(cb710_sg_dwiter_write_next_block);
|
||||
|
||||
@ -241,3 +241,16 @@ config MMC_TMIO
|
||||
help
|
||||
This provides support for the SD/MMC cell found in TC6393XB,
|
||||
T7L66XB and also ipaq ASIC3
|
||||
|
||||
config MMC_CB710
|
||||
tristate "ENE CB710 MMC/SD Interface support"
|
||||
depends on PCI
|
||||
select CB710_CORE
|
||||
help
|
||||
This option enables support for MMC/SD part of ENE CB710/720 Flash
|
||||
memory card reader found in some laptops (ie. some versions of
|
||||
HP Compaq nx9500).
|
||||
|
||||
This driver can also be built as a module. If so, the module
|
||||
will be called cb710-mmc.
|
||||
|
||||
|
||||
@ -29,4 +29,5 @@ endif
|
||||
obj-$(CONFIG_MMC_S3C) += s3cmci.o
|
||||
obj-$(CONFIG_MMC_SDRICOH_CS) += sdricoh_cs.o
|
||||
obj-$(CONFIG_MMC_TMIO) += tmio_mmc.o
|
||||
obj-$(CONFIG_MMC_CB710) += cb710-mmc.o
|
||||
|
||||
|
||||
804
drivers/mmc/host/cb710-mmc.c
Normal file
804
drivers/mmc/host/cb710-mmc.c
Normal file
@ -0,0 +1,804 @@
|
||||
/*
|
||||
* cb710/mmc.c
|
||||
*
|
||||
* Copyright by Michał Mirosław, 2008-2009
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License version 2 as
|
||||
* published by the Free Software Foundation.
|
||||
*/
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/slab.h>
|
||||
#include <linux/pci.h>
|
||||
#include <linux/delay.h>
|
||||
#include "cb710-mmc.h"
|
||||
|
||||
static const u8 cb710_clock_divider_log2[8] = {
|
||||
/* 1, 2, 4, 8, 16, 32, 128, 512 */
|
||||
0, 1, 2, 3, 4, 5, 7, 9
|
||||
};
|
||||
#define CB710_MAX_DIVIDER_IDX \
|
||||
(ARRAY_SIZE(cb710_clock_divider_log2) - 1)
|
||||
|
||||
static const u8 cb710_src_freq_mhz[16] = {
|
||||
33, 10, 20, 25, 30, 35, 40, 45,
|
||||
50, 55, 60, 65, 70, 75, 80, 85
|
||||
};
|
||||
|
||||
static void cb710_mmc_set_clock(struct mmc_host *mmc, int hz)
|
||||
{
|
||||
struct cb710_slot *slot = cb710_mmc_to_slot(mmc);
|
||||
struct pci_dev *pdev = cb710_slot_to_chip(slot)->pdev;
|
||||
u32 src_freq_idx;
|
||||
u32 divider_idx;
|
||||
int src_hz;
|
||||
|
||||
/* this is magic, unverifiable for me, unless I get
|
||||
* MMC card with cables connected to bus signals */
|
||||
pci_read_config_dword(pdev, 0x48, &src_freq_idx);
|
||||
src_freq_idx = (src_freq_idx >> 16) & 0xF;
|
||||
src_hz = cb710_src_freq_mhz[src_freq_idx] * 1000000;
|
||||
|
||||
for (divider_idx = 0; divider_idx < CB710_MAX_DIVIDER_IDX; ++divider_idx) {
|
||||
if (hz >= src_hz >> cb710_clock_divider_log2[divider_idx])
|
||||
break;
|
||||
}
|
||||
|
||||
if (src_freq_idx)
|
||||
divider_idx |= 0x8;
|
||||
|
||||
cb710_pci_update_config_reg(pdev, 0x40, ~0xF0000000, divider_idx << 28);
|
||||
|
||||
dev_dbg(cb710_slot_dev(slot),
|
||||
"clock set to %d Hz, wanted %d Hz; flag = %d\n",
|
||||
src_hz >> cb710_clock_divider_log2[divider_idx & 7],
|
||||
hz, (divider_idx & 8) != 0);
|
||||
}
|
||||
|
||||
static void __cb710_mmc_enable_irq(struct cb710_slot *slot,
|
||||
unsigned short enable, unsigned short mask)
|
||||
{
|
||||
/* clear global IE
|
||||
* - it gets set later if any interrupt sources are enabled */
|
||||
mask |= CB710_MMC_IE_IRQ_ENABLE;
|
||||
|
||||
/* look like interrupt is fired whenever
|
||||
* WORD[0x0C] & WORD[0x10] != 0;
|
||||
* -> bit 15 port 0x0C seems to be global interrupt enable
|
||||
*/
|
||||
|
||||
enable = (cb710_read_port_16(slot, CB710_MMC_IRQ_ENABLE_PORT)
|
||||
& ~mask) | enable;
|
||||
|
||||
if (enable)
|
||||
enable |= CB710_MMC_IE_IRQ_ENABLE;
|
||||
|
||||
cb710_write_port_16(slot, CB710_MMC_IRQ_ENABLE_PORT, enable);
|
||||
}
|
||||
|
||||
static void cb710_mmc_enable_irq(struct cb710_slot *slot,
|
||||
unsigned short enable, unsigned short mask)
|
||||
{
|
||||
struct cb710_mmc_reader *reader = mmc_priv(cb710_slot_to_mmc(slot));
|
||||
unsigned long flags;
|
||||
|
||||
spin_lock_irqsave(&reader->irq_lock, flags);
|
||||
/* this is the only thing irq_lock protects */
|
||||
__cb710_mmc_enable_irq(slot, enable, mask);
|
||||
spin_unlock_irqrestore(&reader->irq_lock, flags);
|
||||
}
|
||||
|
||||
static void cb710_mmc_reset_events(struct cb710_slot *slot)
|
||||
{
|
||||
cb710_write_port_8(slot, CB710_MMC_STATUS0_PORT, 0xFF);
|
||||
cb710_write_port_8(slot, CB710_MMC_STATUS1_PORT, 0xFF);
|
||||
cb710_write_port_8(slot, CB710_MMC_STATUS2_PORT, 0xFF);
|
||||
}
|
||||
|
||||
static int cb710_mmc_is_card_inserted(struct cb710_slot *slot)
|
||||
{
|
||||
return cb710_read_port_8(slot, CB710_MMC_STATUS3_PORT)
|
||||
& CB710_MMC_S3_CARD_DETECTED;
|
||||
}
|
||||
|
||||
static void cb710_mmc_enable_4bit_data(struct cb710_slot *slot, int enable)
|
||||
{
|
||||
dev_dbg(cb710_slot_dev(slot), "configuring %d-data-line%s mode\n",
|
||||
enable ? 4 : 1, enable ? "s" : "");
|
||||
if (enable)
|
||||
cb710_modify_port_8(slot, CB710_MMC_CONFIG1_PORT,
|
||||
CB710_MMC_C1_4BIT_DATA_BUS, 0);
|
||||
else
|
||||
cb710_modify_port_8(slot, CB710_MMC_CONFIG1_PORT,
|
||||
0, CB710_MMC_C1_4BIT_DATA_BUS);
|
||||
}
|
||||
|
||||
static int cb710_check_event(struct cb710_slot *slot, u8 what)
|
||||
{
|
||||
u16 status;
|
||||
|
||||
status = cb710_read_port_16(slot, CB710_MMC_STATUS_PORT);
|
||||
|
||||
if (status & CB710_MMC_S0_FIFO_UNDERFLOW) {
|
||||
/* it is just a guess, so log it */
|
||||
dev_dbg(cb710_slot_dev(slot),
|
||||
"CHECK : ignoring bit 6 in status %04X\n", status);
|
||||
cb710_write_port_8(slot, CB710_MMC_STATUS0_PORT,
|
||||
CB710_MMC_S0_FIFO_UNDERFLOW);
|
||||
status &= ~CB710_MMC_S0_FIFO_UNDERFLOW;
|
||||
}
|
||||
|
||||
if (status & CB710_MMC_STATUS_ERROR_EVENTS) {
|
||||
dev_dbg(cb710_slot_dev(slot),
|
||||
"CHECK : returning EIO on status %04X\n", status);
|
||||
cb710_write_port_8(slot, CB710_MMC_STATUS0_PORT, status & 0xFF);
|
||||
cb710_write_port_8(slot, CB710_MMC_STATUS1_PORT,
|
||||
CB710_MMC_S1_RESET);
|
||||
return -EIO;
|
||||
}
|
||||
|
||||
/* 'what' is a bit in MMC_STATUS1 */
|
||||
if ((status >> 8) & what) {
|
||||
cb710_write_port_8(slot, CB710_MMC_STATUS1_PORT, what);
|
||||
return 1;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int cb710_wait_for_event(struct cb710_slot *slot, u8 what)
|
||||
{
|
||||
int err = 0;
|
||||
unsigned limit = 2000000; /* FIXME: real timeout */
|
||||
|
||||
#ifdef CONFIG_CB710_DEBUG
|
||||
u32 e, x;
|
||||
e = cb710_read_port_32(slot, CB710_MMC_STATUS_PORT);
|
||||
#endif
|
||||
|
||||
while (!(err = cb710_check_event(slot, what))) {
|
||||
if (!--limit) {
|
||||
cb710_dump_regs(cb710_slot_to_chip(slot),
|
||||
CB710_DUMP_REGS_MMC);
|
||||
err = -ETIMEDOUT;
|
||||
break;
|
||||
}
|
||||
udelay(1);
|
||||
}
|
||||
|
||||
#ifdef CONFIG_CB710_DEBUG
|
||||
x = cb710_read_port_32(slot, CB710_MMC_STATUS_PORT);
|
||||
|
||||
limit = 2000000 - limit;
|
||||
if (limit > 100)
|
||||
dev_dbg(cb710_slot_dev(slot),
|
||||
"WAIT10: waited %d loops, what %d, entry val %08X, exit val %08X\n",
|
||||
limit, what, e, x);
|
||||
#endif
|
||||
return err < 0 ? err : 0;
|
||||
}
|
||||
|
||||
|
||||
static int cb710_wait_while_busy(struct cb710_slot *slot, uint8_t mask)
|
||||
{
|
||||
unsigned limit = 500000; /* FIXME: real timeout */
|
||||
int err = 0;
|
||||
|
||||
#ifdef CONFIG_CB710_DEBUG
|
||||
u32 e, x;
|
||||
e = cb710_read_port_32(slot, CB710_MMC_STATUS_PORT);
|
||||
#endif
|
||||
|
||||
while (cb710_read_port_8(slot, CB710_MMC_STATUS2_PORT) & mask) {
|
||||
if (!--limit) {
|
||||
cb710_dump_regs(cb710_slot_to_chip(slot),
|
||||
CB710_DUMP_REGS_MMC);
|
||||
err = -ETIMEDOUT;
|
||||
break;
|
||||
}
|
||||
udelay(1);
|
||||
}
|
||||
|
||||
#ifdef CONFIG_CB710_DEBUG
|
||||
x = cb710_read_port_32(slot, CB710_MMC_STATUS_PORT);
|
||||
|
||||
limit = 500000 - limit;
|
||||
if (limit > 100)
|
||||
dev_dbg(cb710_slot_dev(slot),
|
||||
"WAIT12: waited %d loops, mask %02X, entry val %08X, exit val %08X\n",
|
||||
limit, mask, e, x);
|
||||
#endif
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void cb710_mmc_set_transfer_size(struct cb710_slot *slot,
|
||||
size_t count, size_t blocksize)
|
||||
{
|
||||
cb710_wait_while_busy(slot, CB710_MMC_S2_BUSY_20);
|
||||
cb710_write_port_32(slot, CB710_MMC_TRANSFER_SIZE_PORT,
|
||||
((count - 1) << 16)|(blocksize - 1));
|
||||
|
||||
dev_vdbg(cb710_slot_dev(slot), "set up for %d block%s of %d bytes\n",
|
||||
count, count == 1 ? "" : "s", blocksize);
|
||||
}
|
||||
|
||||
static void cb710_mmc_fifo_hack(struct cb710_slot *slot)
|
||||
{
|
||||
/* without this, received data is prepended with 8-bytes of zeroes */
|
||||
u32 r1, r2;
|
||||
int ok = 0;
|
||||
|
||||
r1 = cb710_read_port_32(slot, CB710_MMC_DATA_PORT);
|
||||
r2 = cb710_read_port_32(slot, CB710_MMC_DATA_PORT);
|
||||
if (cb710_read_port_8(slot, CB710_MMC_STATUS0_PORT)
|
||||
& CB710_MMC_S0_FIFO_UNDERFLOW) {
|
||||
cb710_write_port_8(slot, CB710_MMC_STATUS0_PORT,
|
||||
CB710_MMC_S0_FIFO_UNDERFLOW);
|
||||
ok = 1;
|
||||
}
|
||||
|
||||
dev_dbg(cb710_slot_dev(slot),
|
||||
"FIFO-read-hack: expected STATUS0 bit was %s\n",
|
||||
ok ? "set." : "NOT SET!");
|
||||
dev_dbg(cb710_slot_dev(slot),
|
||||
"FIFO-read-hack: dwords ignored: %08X %08X - %s\n",
|
||||
r1, r2, (r1|r2) ? "BAD (NOT ZERO)!" : "ok");
|
||||
}
|
||||
|
||||
static int cb710_mmc_receive_pio(struct cb710_slot *slot,
|
||||
struct sg_mapping_iter *miter, size_t dw_count)
|
||||
{
|
||||
if (!(cb710_read_port_8(slot, CB710_MMC_STATUS2_PORT) & CB710_MMC_S2_FIFO_READY)) {
|
||||
int err = cb710_wait_for_event(slot,
|
||||
CB710_MMC_S1_PIO_TRANSFER_DONE);
|
||||
if (err)
|
||||
return err;
|
||||
}
|
||||
|
||||
cb710_sg_dwiter_write_from_io(miter,
|
||||
slot->iobase + CB710_MMC_DATA_PORT, dw_count);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static bool cb710_is_transfer_size_supported(struct mmc_data *data)
|
||||
{
|
||||
return !(data->blksz & 15 && (data->blocks != 1 || data->blksz != 8));
|
||||
}
|
||||
|
||||
static int cb710_mmc_receive(struct cb710_slot *slot, struct mmc_data *data)
|
||||
{
|
||||
struct sg_mapping_iter miter;
|
||||
size_t len, blocks = data->blocks;
|
||||
int err = 0;
|
||||
|
||||
/* TODO: I don't know how/if the hardware handles non-16B-boundary blocks
|
||||
* except single 8B block */
|
||||
if (unlikely(data->blksz & 15 && (data->blocks != 1 || data->blksz != 8)))
|
||||
return -EINVAL;
|
||||
|
||||
sg_miter_start(&miter, data->sg, data->sg_len, 0);
|
||||
|
||||
cb710_modify_port_8(slot, CB710_MMC_CONFIG2_PORT,
|
||||
15, CB710_MMC_C2_READ_PIO_SIZE_MASK);
|
||||
|
||||
cb710_mmc_fifo_hack(slot);
|
||||
|
||||
while (blocks-- > 0) {
|
||||
len = data->blksz;
|
||||
|
||||
while (len >= 16) {
|
||||
err = cb710_mmc_receive_pio(slot, &miter, 4);
|
||||
if (err)
|
||||
goto out;
|
||||
len -= 16;
|
||||
}
|
||||
|
||||
if (!len)
|
||||
continue;
|
||||
|
||||
cb710_modify_port_8(slot, CB710_MMC_CONFIG2_PORT,
|
||||
len - 1, CB710_MMC_C2_READ_PIO_SIZE_MASK);
|
||||
|
||||
len = (len >= 8) ? 4 : 2;
|
||||
err = cb710_mmc_receive_pio(slot, &miter, len);
|
||||
if (err)
|
||||
goto out;
|
||||
}
|
||||
out:
|
||||
cb710_sg_miter_stop_writing(&miter);
|
||||
return err;
|
||||
}
|
||||
|
||||
static int cb710_mmc_send(struct cb710_slot *slot, struct mmc_data *data)
|
||||
{
|
||||
struct sg_mapping_iter miter;
|
||||
size_t len, blocks = data->blocks;
|
||||
int err = 0;
|
||||
|
||||
/* TODO: I don't know how/if the hardware handles multiple
|
||||
* non-16B-boundary blocks */
|
||||
if (unlikely(data->blocks > 1 && data->blksz & 15))
|
||||
return -EINVAL;
|
||||
|
||||
sg_miter_start(&miter, data->sg, data->sg_len, 0);
|
||||
|
||||
cb710_modify_port_8(slot, CB710_MMC_CONFIG2_PORT,
|
||||
0, CB710_MMC_C2_READ_PIO_SIZE_MASK);
|
||||
|
||||
while (blocks-- > 0) {
|
||||
len = (data->blksz + 15) >> 4;
|
||||
do {
|
||||
if (!(cb710_read_port_8(slot, CB710_MMC_STATUS2_PORT)
|
||||
& CB710_MMC_S2_FIFO_EMPTY)) {
|
||||
err = cb710_wait_for_event(slot,
|
||||
CB710_MMC_S1_PIO_TRANSFER_DONE);
|
||||
if (err)
|
||||
goto out;
|
||||
}
|
||||
cb710_sg_dwiter_read_to_io(&miter,
|
||||
slot->iobase + CB710_MMC_DATA_PORT, 4);
|
||||
} while (--len);
|
||||
}
|
||||
out:
|
||||
sg_miter_stop(&miter);
|
||||
return err;
|
||||
}
|
||||
|
||||
static u16 cb710_encode_cmd_flags(struct cb710_mmc_reader *reader,
|
||||
struct mmc_command *cmd)
|
||||
{
|
||||
unsigned int flags = cmd->flags;
|
||||
u16 cb_flags = 0;
|
||||
|
||||
/* Windows driver returned 0 for commands for which no response
|
||||
* is expected. It happened that there were only two such commands
|
||||
* used: MMC_GO_IDLE_STATE and MMC_GO_INACTIVE_STATE so it might
|
||||
* as well be a bug in that driver.
|
||||
*
|
||||
* Original driver set bit 14 for MMC/SD application
|
||||
* commands. There's no difference 'on the wire' and
|
||||
* it apparently works without it anyway.
|
||||
*/
|
||||
|
||||
switch (flags & MMC_CMD_MASK) {
|
||||
case MMC_CMD_AC: cb_flags = CB710_MMC_CMD_AC; break;
|
||||
case MMC_CMD_ADTC: cb_flags = CB710_MMC_CMD_ADTC; break;
|
||||
case MMC_CMD_BC: cb_flags = CB710_MMC_CMD_BC; break;
|
||||
case MMC_CMD_BCR: cb_flags = CB710_MMC_CMD_BCR; break;
|
||||
}
|
||||
|
||||
if (flags & MMC_RSP_BUSY)
|
||||
cb_flags |= CB710_MMC_RSP_BUSY;
|
||||
|
||||
cb_flags |= cmd->opcode << CB710_MMC_CMD_CODE_SHIFT;
|
||||
|
||||
if (cmd->data && (cmd->data->flags & MMC_DATA_READ))
|
||||
cb_flags |= CB710_MMC_DATA_READ;
|
||||
|
||||
if (flags & MMC_RSP_PRESENT) {
|
||||
/* Windows driver set 01 at bits 4,3 except for
|
||||
* MMC_SET_BLOCKLEN where it set 10. Maybe the
|
||||
* hardware can do something special about this
|
||||
* command? The original driver looks buggy/incomplete
|
||||
* anyway so we ignore this for now.
|
||||
*
|
||||
* I assume that 00 here means no response is expected.
|
||||
*/
|
||||
cb_flags |= CB710_MMC_RSP_PRESENT;
|
||||
|
||||
if (flags & MMC_RSP_136)
|
||||
cb_flags |= CB710_MMC_RSP_136;
|
||||
if (!(flags & MMC_RSP_CRC))
|
||||
cb_flags |= CB710_MMC_RSP_NO_CRC;
|
||||
}
|
||||
|
||||
return cb_flags;
|
||||
}
|
||||
|
||||
static void cb710_receive_response(struct cb710_slot *slot,
|
||||
struct mmc_command *cmd)
|
||||
{
|
||||
unsigned rsp_opcode, wanted_opcode;
|
||||
|
||||
/* Looks like final byte with CRC is always stripped (same as SDHCI) */
|
||||
if (cmd->flags & MMC_RSP_136) {
|
||||
u32 resp[4];
|
||||
|
||||
resp[0] = cb710_read_port_32(slot, CB710_MMC_RESPONSE3_PORT);
|
||||
resp[1] = cb710_read_port_32(slot, CB710_MMC_RESPONSE2_PORT);
|
||||
resp[2] = cb710_read_port_32(slot, CB710_MMC_RESPONSE1_PORT);
|
||||
resp[3] = cb710_read_port_32(slot, CB710_MMC_RESPONSE0_PORT);
|
||||
rsp_opcode = resp[0] >> 24;
|
||||
|
||||
cmd->resp[0] = (resp[0] << 8)|(resp[1] >> 24);
|
||||
cmd->resp[1] = (resp[1] << 8)|(resp[2] >> 24);
|
||||
cmd->resp[2] = (resp[2] << 8)|(resp[3] >> 24);
|
||||
cmd->resp[3] = (resp[3] << 8);
|
||||
} else {
|
||||
rsp_opcode = cb710_read_port_32(slot, CB710_MMC_RESPONSE1_PORT) & 0x3F;
|
||||
cmd->resp[0] = cb710_read_port_32(slot, CB710_MMC_RESPONSE0_PORT);
|
||||
}
|
||||
|
||||
wanted_opcode = (cmd->flags & MMC_RSP_OPCODE) ? cmd->opcode : 0x3F;
|
||||
if (rsp_opcode != wanted_opcode)
|
||||
cmd->error = -EILSEQ;
|
||||
}
|
||||
|
||||
static int cb710_mmc_transfer_data(struct cb710_slot *slot,
|
||||
struct mmc_data *data)
|
||||
{
|
||||
int error, to;
|
||||
|
||||
if (data->flags & MMC_DATA_READ)
|
||||
error = cb710_mmc_receive(slot, data);
|
||||
else
|
||||
error = cb710_mmc_send(slot, data);
|
||||
|
||||
to = cb710_wait_for_event(slot, CB710_MMC_S1_DATA_TRANSFER_DONE);
|
||||
if (!error)
|
||||
error = to;
|
||||
|
||||
if (!error)
|
||||
data->bytes_xfered = data->blksz * data->blocks;
|
||||
return error;
|
||||
}
|
||||
|
||||
static int cb710_mmc_command(struct mmc_host *mmc, struct mmc_command *cmd)
|
||||
{
|
||||
struct cb710_slot *slot = cb710_mmc_to_slot(mmc);
|
||||
struct cb710_mmc_reader *reader = mmc_priv(mmc);
|
||||
struct mmc_data *data = cmd->data;
|
||||
|
||||
u16 cb_cmd = cb710_encode_cmd_flags(reader, cmd);
|
||||
dev_dbg(cb710_slot_dev(slot), "cmd request: 0x%04X\n", cb_cmd);
|
||||
|
||||
if (data) {
|
||||
if (!cb710_is_transfer_size_supported(data)) {
|
||||
data->error = -EINVAL;
|
||||
return -1;
|
||||
}
|
||||
cb710_mmc_set_transfer_size(slot, data->blocks, data->blksz);
|
||||
}
|
||||
|
||||
cb710_wait_while_busy(slot, CB710_MMC_S2_BUSY_20|CB710_MMC_S2_BUSY_10);
|
||||
cb710_write_port_16(slot, CB710_MMC_CMD_TYPE_PORT, cb_cmd);
|
||||
cb710_wait_while_busy(slot, CB710_MMC_S2_BUSY_20);
|
||||
cb710_write_port_32(slot, CB710_MMC_CMD_PARAM_PORT, cmd->arg);
|
||||
cb710_mmc_reset_events(slot);
|
||||
cb710_wait_while_busy(slot, CB710_MMC_S2_BUSY_20);
|
||||
cb710_modify_port_8(slot, CB710_MMC_CONFIG0_PORT, 0x01, 0);
|
||||
|
||||
cmd->error = cb710_wait_for_event(slot, CB710_MMC_S1_COMMAND_SENT);
|
||||
if (cmd->error)
|
||||
return -1;
|
||||
|
||||
if (cmd->flags & MMC_RSP_PRESENT) {
|
||||
cb710_receive_response(slot, cmd);
|
||||
if (cmd->error)
|
||||
return -1;
|
||||
}
|
||||
|
||||
if (data)
|
||||
data->error = cb710_mmc_transfer_data(slot, data);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void cb710_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
|
||||
{
|
||||
struct cb710_slot *slot = cb710_mmc_to_slot(mmc);
|
||||
struct cb710_mmc_reader *reader = mmc_priv(mmc);
|
||||
|
||||
WARN_ON(reader->mrq != NULL);
|
||||
|
||||
reader->mrq = mrq;
|
||||
cb710_mmc_enable_irq(slot, CB710_MMC_IE_TEST_MASK, 0);
|
||||
|
||||
if (cb710_mmc_is_card_inserted(slot)) {
|
||||
if (!cb710_mmc_command(mmc, mrq->cmd) && mrq->stop)
|
||||
cb710_mmc_command(mmc, mrq->stop);
|
||||
mdelay(1);
|
||||
} else {
|
||||
mrq->cmd->error = -ENOMEDIUM;
|
||||
}
|
||||
|
||||
tasklet_schedule(&reader->finish_req_tasklet);
|
||||
}
|
||||
|
||||
static int cb710_mmc_powerup(struct cb710_slot *slot)
|
||||
{
|
||||
#ifdef CONFIG_CB710_DEBUG
|
||||
struct cb710_chip *chip = cb710_slot_to_chip(slot);
|
||||
#endif
|
||||
int err;
|
||||
|
||||
/* a lot of magic; see comment in cb710_mmc_set_clock() */
|
||||
dev_dbg(cb710_slot_dev(slot), "bus powerup\n");
|
||||
cb710_dump_regs(chip, CB710_DUMP_REGS_MMC);
|
||||
err = cb710_wait_while_busy(slot, CB710_MMC_S2_BUSY_20);
|
||||
if (unlikely(err))
|
||||
return err;
|
||||
cb710_modify_port_8(slot, CB710_MMC_CONFIG1_PORT, 0x80, 0);
|
||||
cb710_modify_port_8(slot, CB710_MMC_CONFIG3_PORT, 0x80, 0);
|
||||
cb710_dump_regs(chip, CB710_DUMP_REGS_MMC);
|
||||
mdelay(1);
|
||||
dev_dbg(cb710_slot_dev(slot), "after delay 1\n");
|
||||
cb710_dump_regs(chip, CB710_DUMP_REGS_MMC);
|
||||
err = cb710_wait_while_busy(slot, CB710_MMC_S2_BUSY_20);
|
||||
if (unlikely(err))
|
||||
return err;
|
||||
cb710_modify_port_8(slot, CB710_MMC_CONFIG1_PORT, 0x09, 0);
|
||||
cb710_dump_regs(chip, CB710_DUMP_REGS_MMC);
|
||||
mdelay(1);
|
||||
dev_dbg(cb710_slot_dev(slot), "after delay 2\n");
|
||||
cb710_dump_regs(chip, CB710_DUMP_REGS_MMC);
|
||||
err = cb710_wait_while_busy(slot, CB710_MMC_S2_BUSY_20);
|
||||
if (unlikely(err))
|
||||
return err;
|
||||
cb710_modify_port_8(slot, CB710_MMC_CONFIG1_PORT, 0, 0x08);
|
||||
cb710_dump_regs(chip, CB710_DUMP_REGS_MMC);
|
||||
mdelay(2);
|
||||
dev_dbg(cb710_slot_dev(slot), "after delay 3\n");
|
||||
cb710_dump_regs(chip, CB710_DUMP_REGS_MMC);
|
||||
cb710_modify_port_8(slot, CB710_MMC_CONFIG0_PORT, 0x06, 0);
|
||||
cb710_modify_port_8(slot, CB710_MMC_CONFIG1_PORT, 0x70, 0);
|
||||
cb710_modify_port_8(slot, CB710_MMC_CONFIG2_PORT, 0x80, 0);
|
||||
cb710_modify_port_8(slot, CB710_MMC_CONFIG3_PORT, 0x03, 0);
|
||||
cb710_dump_regs(chip, CB710_DUMP_REGS_MMC);
|
||||
err = cb710_wait_while_busy(slot, CB710_MMC_S2_BUSY_20);
|
||||
if (unlikely(err))
|
||||
return err;
|
||||
/* This port behaves weird: quick byte reads of 0x08,0x09 return
|
||||
* 0xFF,0x00 after writing 0xFFFF to 0x08; it works correctly when
|
||||
* read/written from userspace... What am I missing here?
|
||||
* (it doesn't depend on write-to-read delay) */
|
||||
cb710_write_port_16(slot, CB710_MMC_CONFIGB_PORT, 0xFFFF);
|
||||
cb710_modify_port_8(slot, CB710_MMC_CONFIG0_PORT, 0x06, 0);
|
||||
cb710_dump_regs(chip, CB710_DUMP_REGS_MMC);
|
||||
dev_dbg(cb710_slot_dev(slot), "bus powerup finished\n");
|
||||
|
||||
return cb710_check_event(slot, 0);
|
||||
}
|
||||
|
||||
static void cb710_mmc_powerdown(struct cb710_slot *slot)
|
||||
{
|
||||
cb710_modify_port_8(slot, CB710_MMC_CONFIG1_PORT, 0, 0x81);
|
||||
cb710_modify_port_8(slot, CB710_MMC_CONFIG3_PORT, 0, 0x80);
|
||||
}
|
||||
|
||||
static void cb710_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
|
||||
{
|
||||
struct cb710_slot *slot = cb710_mmc_to_slot(mmc);
|
||||
struct cb710_mmc_reader *reader = mmc_priv(mmc);
|
||||
int err;
|
||||
|
||||
cb710_mmc_set_clock(mmc, ios->clock);
|
||||
|
||||
if (!cb710_mmc_is_card_inserted(slot)) {
|
||||
dev_dbg(cb710_slot_dev(slot),
|
||||
"no card inserted - ignoring bus powerup request\n");
|
||||
ios->power_mode = MMC_POWER_OFF;
|
||||
}
|
||||
|
||||
if (ios->power_mode != reader->last_power_mode)
|
||||
switch (ios->power_mode) {
|
||||
case MMC_POWER_ON:
|
||||
err = cb710_mmc_powerup(slot);
|
||||
if (err) {
|
||||
dev_warn(cb710_slot_dev(slot),
|
||||
"powerup failed (%d)- retrying\n", err);
|
||||
cb710_mmc_powerdown(slot);
|
||||
udelay(1);
|
||||
err = cb710_mmc_powerup(slot);
|
||||
if (err)
|
||||
dev_warn(cb710_slot_dev(slot),
|
||||
"powerup retry failed (%d) - expect errors\n",
|
||||
err);
|
||||
}
|
||||
reader->last_power_mode = MMC_POWER_ON;
|
||||
break;
|
||||
case MMC_POWER_OFF:
|
||||
cb710_mmc_powerdown(slot);
|
||||
reader->last_power_mode = MMC_POWER_OFF;
|
||||
break;
|
||||
case MMC_POWER_UP:
|
||||
default:
|
||||
/* ignore */;
|
||||
}
|
||||
|
||||
cb710_mmc_enable_4bit_data(slot, ios->bus_width != MMC_BUS_WIDTH_1);
|
||||
|
||||
cb710_mmc_enable_irq(slot, CB710_MMC_IE_TEST_MASK, 0);
|
||||
}
|
||||
|
||||
static int cb710_mmc_get_ro(struct mmc_host *mmc)
|
||||
{
|
||||
struct cb710_slot *slot = cb710_mmc_to_slot(mmc);
|
||||
|
||||
return cb710_read_port_8(slot, CB710_MMC_STATUS3_PORT)
|
||||
& CB710_MMC_S3_WRITE_PROTECTED;
|
||||
}
|
||||
|
||||
static int cb710_mmc_irq_handler(struct cb710_slot *slot)
|
||||
{
|
||||
struct mmc_host *mmc = cb710_slot_to_mmc(slot);
|
||||
struct cb710_mmc_reader *reader = mmc_priv(mmc);
|
||||
u32 status, config1, config2, irqen;
|
||||
|
||||
status = cb710_read_port_32(slot, CB710_MMC_STATUS_PORT);
|
||||
irqen = cb710_read_port_32(slot, CB710_MMC_IRQ_ENABLE_PORT);
|
||||
config2 = cb710_read_port_32(slot, CB710_MMC_CONFIGB_PORT);
|
||||
config1 = cb710_read_port_32(slot, CB710_MMC_CONFIG_PORT);
|
||||
|
||||
dev_dbg(cb710_slot_dev(slot), "interrupt; status: %08X, "
|
||||
"ie: %08X, c2: %08X, c1: %08X\n",
|
||||
status, irqen, config2, config1);
|
||||
|
||||
if (status & (CB710_MMC_S1_CARD_CHANGED << 8)) {
|
||||
/* ack the event */
|
||||
cb710_write_port_8(slot, CB710_MMC_STATUS1_PORT,
|
||||
CB710_MMC_S1_CARD_CHANGED);
|
||||
if ((irqen & CB710_MMC_IE_CISTATUS_MASK)
|
||||
== CB710_MMC_IE_CISTATUS_MASK)
|
||||
mmc_detect_change(mmc, HZ/5);
|
||||
} else {
|
||||
dev_dbg(cb710_slot_dev(slot), "unknown interrupt (test)\n");
|
||||
spin_lock(&reader->irq_lock);
|
||||
__cb710_mmc_enable_irq(slot, 0, CB710_MMC_IE_TEST_MASK);
|
||||
spin_unlock(&reader->irq_lock);
|
||||
}
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
static void cb710_mmc_finish_request_tasklet(unsigned long data)
|
||||
{
|
||||
struct mmc_host *mmc = (void *)data;
|
||||
struct cb710_mmc_reader *reader = mmc_priv(mmc);
|
||||
struct mmc_request *mrq = reader->mrq;
|
||||
|
||||
reader->mrq = NULL;
|
||||
mmc_request_done(mmc, mrq);
|
||||
}
|
||||
|
||||
static const struct mmc_host_ops cb710_mmc_host = {
|
||||
.request = cb710_mmc_request,
|
||||
.set_ios = cb710_mmc_set_ios,
|
||||
.get_ro = cb710_mmc_get_ro
|
||||
};
|
||||
|
||||
#ifdef CONFIG_PM
|
||||
|
||||
static int cb710_mmc_suspend(struct platform_device *pdev, pm_message_t state)
|
||||
{
|
||||
struct cb710_slot *slot = cb710_pdev_to_slot(pdev);
|
||||
struct mmc_host *mmc = cb710_slot_to_mmc(slot);
|
||||
int err;
|
||||
|
||||
err = mmc_suspend_host(mmc, state);
|
||||
if (err)
|
||||
return err;
|
||||
|
||||
cb710_mmc_enable_irq(slot, 0, ~0);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int cb710_mmc_resume(struct platform_device *pdev)
|
||||
{
|
||||
struct cb710_slot *slot = cb710_pdev_to_slot(pdev);
|
||||
struct mmc_host *mmc = cb710_slot_to_mmc(slot);
|
||||
|
||||
cb710_mmc_enable_irq(slot, 0, ~0);
|
||||
|
||||
return mmc_resume_host(mmc);
|
||||
}
|
||||
|
||||
#endif /* CONFIG_PM */
|
||||
|
||||
static int __devinit cb710_mmc_init(struct platform_device *pdev)
|
||||
{
|
||||
struct cb710_slot *slot = cb710_pdev_to_slot(pdev);
|
||||
struct cb710_chip *chip = cb710_slot_to_chip(slot);
|
||||
struct mmc_host *mmc;
|
||||
struct cb710_mmc_reader *reader;
|
||||
int err;
|
||||
u32 val;
|
||||
|
||||
mmc = mmc_alloc_host(sizeof(*reader), cb710_slot_dev(slot));
|
||||
if (!mmc)
|
||||
return -ENOMEM;
|
||||
|
||||
dev_set_drvdata(&pdev->dev, mmc);
|
||||
|
||||
/* harmless (maybe) magic */
|
||||
pci_read_config_dword(chip->pdev, 0x48, &val);
|
||||
val = cb710_src_freq_mhz[(val >> 16) & 0xF];
|
||||
dev_dbg(cb710_slot_dev(slot), "source frequency: %dMHz\n", val);
|
||||
val *= 1000000;
|
||||
|
||||
mmc->ops = &cb710_mmc_host;
|
||||
mmc->f_max = val;
|
||||
mmc->f_min = val >> cb710_clock_divider_log2[CB710_MAX_DIVIDER_IDX];
|
||||
mmc->ocr_avail = MMC_VDD_32_33|MMC_VDD_33_34;
|
||||
mmc->caps = MMC_CAP_4_BIT_DATA;
|
||||
|
||||
reader = mmc_priv(mmc);
|
||||
|
||||
tasklet_init(&reader->finish_req_tasklet,
|
||||
cb710_mmc_finish_request_tasklet, (unsigned long)mmc);
|
||||
spin_lock_init(&reader->irq_lock);
|
||||
cb710_dump_regs(chip, CB710_DUMP_REGS_MMC);
|
||||
|
||||
cb710_mmc_enable_irq(slot, 0, ~0);
|
||||
cb710_set_irq_handler(slot, cb710_mmc_irq_handler);
|
||||
|
||||
err = mmc_add_host(mmc);
|
||||
if (unlikely(err))
|
||||
goto err_free_mmc;
|
||||
|
||||
dev_dbg(cb710_slot_dev(slot), "mmc_hostname is %s\n",
|
||||
mmc_hostname(mmc));
|
||||
|
||||
cb710_mmc_enable_irq(slot, CB710_MMC_IE_CARD_INSERTION_STATUS, 0);
|
||||
|
||||
return 0;
|
||||
|
||||
err_free_mmc:
|
||||
dev_dbg(cb710_slot_dev(slot), "mmc_add_host() failed: %d\n", err);
|
||||
|
||||
mmc_free_host(mmc);
|
||||
return err;
|
||||
}
|
||||
|
||||
static int __devexit cb710_mmc_exit(struct platform_device *pdev)
|
||||
{
|
||||
struct cb710_slot *slot = cb710_pdev_to_slot(pdev);
|
||||
struct mmc_host *mmc = cb710_slot_to_mmc(slot);
|
||||
struct cb710_mmc_reader *reader = mmc_priv(mmc);
|
||||
|
||||
cb710_mmc_enable_irq(slot, 0, CB710_MMC_IE_CARD_INSERTION_STATUS);
|
||||
|
||||
mmc_remove_host(mmc);
|
||||
|
||||
/* IRQs should be disabled now, but let's stay on the safe side */
|
||||
cb710_mmc_enable_irq(slot, 0, ~0);
|
||||
cb710_set_irq_handler(slot, NULL);
|
||||
|
||||
/* clear config ports - just in case */
|
||||
cb710_write_port_32(slot, CB710_MMC_CONFIG_PORT, 0);
|
||||
cb710_write_port_16(slot, CB710_MMC_CONFIGB_PORT, 0);
|
||||
|
||||
tasklet_kill(&reader->finish_req_tasklet);
|
||||
|
||||
mmc_free_host(mmc);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct platform_driver cb710_mmc_driver = {
|
||||
.driver.name = "cb710-mmc",
|
||||
.probe = cb710_mmc_init,
|
||||
.remove = __devexit_p(cb710_mmc_exit),
|
||||
#ifdef CONFIG_PM
|
||||
.suspend = cb710_mmc_suspend,
|
||||
.resume = cb710_mmc_resume,
|
||||
#endif
|
||||
};
|
||||
|
||||
static int __init cb710_mmc_init_module(void)
|
||||
{
|
||||
return platform_driver_register(&cb710_mmc_driver);
|
||||
}
|
||||
|
||||
static void __exit cb710_mmc_cleanup_module(void)
|
||||
{
|
||||
platform_driver_unregister(&cb710_mmc_driver);
|
||||
}
|
||||
|
||||
module_init(cb710_mmc_init_module);
|
||||
module_exit(cb710_mmc_cleanup_module);
|
||||
|
||||
MODULE_AUTHOR("Michał Mirosław <mirq-linux@rere.qmqm.pl>");
|
||||
MODULE_DESCRIPTION("ENE CB710 memory card reader driver - MMC/SD part");
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_ALIAS("platform:cb710-mmc");
|
||||
104
drivers/mmc/host/cb710-mmc.h
Normal file
104
drivers/mmc/host/cb710-mmc.h
Normal file
@ -0,0 +1,104 @@
|
||||
/*
|
||||
* cb710/cb710-mmc.h
|
||||
*
|
||||
* Copyright by Michał Mirosław, 2008-2009
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License version 2 as
|
||||
* published by the Free Software Foundation.
|
||||
*/
|
||||
#ifndef LINUX_CB710_MMC_H
|
||||
#define LINUX_CB710_MMC_H
|
||||
|
||||
#include <linux/cb710.h>
|
||||
|
||||
/* per-MMC-reader structure */
|
||||
struct cb710_mmc_reader {
|
||||
struct tasklet_struct finish_req_tasklet;
|
||||
struct mmc_request *mrq;
|
||||
spinlock_t irq_lock;
|
||||
unsigned char last_power_mode;
|
||||
};
|
||||
|
||||
/* some device struct walking */
|
||||
|
||||
static inline struct mmc_host *cb710_slot_to_mmc(struct cb710_slot *slot)
|
||||
{
|
||||
return dev_get_drvdata(&slot->pdev.dev);
|
||||
}
|
||||
|
||||
static inline struct cb710_slot *cb710_mmc_to_slot(struct mmc_host *mmc)
|
||||
{
|
||||
struct platform_device *pdev = container_of(mmc_dev(mmc),
|
||||
struct platform_device, dev);
|
||||
return cb710_pdev_to_slot(pdev);
|
||||
}
|
||||
|
||||
/* registers (this might be all wrong ;) */
|
||||
|
||||
#define CB710_MMC_DATA_PORT 0x00
|
||||
|
||||
#define CB710_MMC_CONFIG_PORT 0x04
|
||||
#define CB710_MMC_CONFIG0_PORT 0x04
|
||||
#define CB710_MMC_CONFIG1_PORT 0x05
|
||||
#define CB710_MMC_C1_4BIT_DATA_BUS 0x40
|
||||
#define CB710_MMC_CONFIG2_PORT 0x06
|
||||
#define CB710_MMC_C2_READ_PIO_SIZE_MASK 0x0F /* N-1 */
|
||||
#define CB710_MMC_CONFIG3_PORT 0x07
|
||||
|
||||
#define CB710_MMC_CONFIGB_PORT 0x08
|
||||
|
||||
#define CB710_MMC_IRQ_ENABLE_PORT 0x0C
|
||||
#define CB710_MMC_IE_TEST_MASK 0x00BF
|
||||
#define CB710_MMC_IE_CARD_INSERTION_STATUS 0x1000
|
||||
#define CB710_MMC_IE_IRQ_ENABLE 0x8000
|
||||
#define CB710_MMC_IE_CISTATUS_MASK \
|
||||
(CB710_MMC_IE_CARD_INSERTION_STATUS|CB710_MMC_IE_IRQ_ENABLE)
|
||||
|
||||
#define CB710_MMC_STATUS_PORT 0x10
|
||||
#define CB710_MMC_STATUS_ERROR_EVENTS 0x60FF
|
||||
#define CB710_MMC_STATUS0_PORT 0x10
|
||||
#define CB710_MMC_S0_FIFO_UNDERFLOW 0x40
|
||||
#define CB710_MMC_STATUS1_PORT 0x11
|
||||
#define CB710_MMC_S1_COMMAND_SENT 0x01
|
||||
#define CB710_MMC_S1_DATA_TRANSFER_DONE 0x02
|
||||
#define CB710_MMC_S1_PIO_TRANSFER_DONE 0x04
|
||||
#define CB710_MMC_S1_CARD_CHANGED 0x10
|
||||
#define CB710_MMC_S1_RESET 0x20
|
||||
#define CB710_MMC_STATUS2_PORT 0x12
|
||||
#define CB710_MMC_S2_FIFO_READY 0x01
|
||||
#define CB710_MMC_S2_FIFO_EMPTY 0x02
|
||||
#define CB710_MMC_S2_BUSY_10 0x10
|
||||
#define CB710_MMC_S2_BUSY_20 0x20
|
||||
#define CB710_MMC_STATUS3_PORT 0x13
|
||||
#define CB710_MMC_S3_CARD_DETECTED 0x02
|
||||
#define CB710_MMC_S3_WRITE_PROTECTED 0x04
|
||||
|
||||
#define CB710_MMC_CMD_TYPE_PORT 0x14
|
||||
#define CB710_MMC_RSP_TYPE_MASK 0x0007
|
||||
#define CB710_MMC_RSP_R1 (0)
|
||||
#define CB710_MMC_RSP_136 (5)
|
||||
#define CB710_MMC_RSP_NO_CRC (2)
|
||||
#define CB710_MMC_RSP_PRESENT_MASK 0x0018
|
||||
#define CB710_MMC_RSP_NONE (0 << 3)
|
||||
#define CB710_MMC_RSP_PRESENT (1 << 3)
|
||||
#define CB710_MMC_RSP_PRESENT_X (2 << 3)
|
||||
#define CB710_MMC_CMD_TYPE_MASK 0x0060
|
||||
#define CB710_MMC_CMD_BC (0 << 5)
|
||||
#define CB710_MMC_CMD_BCR (1 << 5)
|
||||
#define CB710_MMC_CMD_AC (2 << 5)
|
||||
#define CB710_MMC_CMD_ADTC (3 << 5)
|
||||
#define CB710_MMC_DATA_READ 0x0080
|
||||
#define CB710_MMC_CMD_CODE_MASK 0x3F00
|
||||
#define CB710_MMC_CMD_CODE_SHIFT 8
|
||||
#define CB710_MMC_IS_APP_CMD 0x4000
|
||||
#define CB710_MMC_RSP_BUSY 0x8000
|
||||
|
||||
#define CB710_MMC_CMD_PARAM_PORT 0x18
|
||||
#define CB710_MMC_TRANSFER_SIZE_PORT 0x1C
|
||||
#define CB710_MMC_RESPONSE0_PORT 0x20
|
||||
#define CB710_MMC_RESPONSE1_PORT 0x24
|
||||
#define CB710_MMC_RESPONSE2_PORT 0x28
|
||||
#define CB710_MMC_RESPONSE3_PORT 0x2C
|
||||
|
||||
#endif /* LINUX_CB710_MMC_H */
|
||||
238
include/linux/cb710.h
Normal file
238
include/linux/cb710.h
Normal file
@ -0,0 +1,238 @@
|
||||
/*
|
||||
* cb710/cb710.h
|
||||
*
|
||||
* Copyright by Michał Mirosław, 2008-2009
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License version 2 as
|
||||
* published by the Free Software Foundation.
|
||||
*/
|
||||
#ifndef LINUX_CB710_DRIVER_H
|
||||
#define LINUX_CB710_DRIVER_H
|
||||
|
||||
#ifdef CONFIG_CB710_DEBUG
|
||||
#define DEBUG
|
||||
#endif
|
||||
|
||||
/* verify assumptions on platform_device framework */
|
||||
#define CONFIG_CB710_DEBUG_ASSUMPTIONS
|
||||
|
||||
#include <linux/io.h>
|
||||
#include <linux/interrupt.h>
|
||||
#include <linux/spinlock.h>
|
||||
#include <linux/pci.h>
|
||||
#include <linux/platform_device.h>
|
||||
#include <linux/mmc/host.h>
|
||||
|
||||
struct cb710_slot;
|
||||
|
||||
typedef int (*cb710_irq_handler_t)(struct cb710_slot *);
|
||||
|
||||
/* per-virtual-slot structure */
|
||||
struct cb710_slot {
|
||||
struct platform_device pdev;
|
||||
void __iomem *iobase;
|
||||
cb710_irq_handler_t irq_handler;
|
||||
};
|
||||
|
||||
/* per-device structure */
|
||||
struct cb710_chip {
|
||||
struct pci_dev *pdev;
|
||||
void __iomem *iobase;
|
||||
unsigned platform_id;
|
||||
#ifdef CONFIG_CB710_DEBUG_ASSUMPTIONS
|
||||
atomic_t slot_refs_count;
|
||||
#endif
|
||||
unsigned slot_mask;
|
||||
unsigned slots;
|
||||
spinlock_t irq_lock;
|
||||
struct cb710_slot slot[0];
|
||||
};
|
||||
|
||||
/* NOTE: cb710_chip.slots is modified only during device init/exit and
|
||||
* they are all serialized wrt themselves */
|
||||
|
||||
/* cb710_chip.slot_mask values */
|
||||
#define CB710_SLOT_MMC 1
|
||||
#define CB710_SLOT_MS 2
|
||||
#define CB710_SLOT_SM 4
|
||||
|
||||
/* slot port accessors - so the logic is more clear in the code */
|
||||
#define CB710_PORT_ACCESSORS(t) \
|
||||
static inline void cb710_write_port_##t(struct cb710_slot *slot, \
|
||||
unsigned port, u##t value) \
|
||||
{ \
|
||||
iowrite##t(value, slot->iobase + port); \
|
||||
} \
|
||||
\
|
||||
static inline u##t cb710_read_port_##t(struct cb710_slot *slot, \
|
||||
unsigned port) \
|
||||
{ \
|
||||
return ioread##t(slot->iobase + port); \
|
||||
} \
|
||||
\
|
||||
static inline void cb710_modify_port_##t(struct cb710_slot *slot, \
|
||||
unsigned port, u##t set, u##t clear) \
|
||||
{ \
|
||||
iowrite##t( \
|
||||
(ioread##t(slot->iobase + port) & ~clear)|set, \
|
||||
slot->iobase + port); \
|
||||
}
|
||||
|
||||
CB710_PORT_ACCESSORS(8)
|
||||
CB710_PORT_ACCESSORS(16)
|
||||
CB710_PORT_ACCESSORS(32)
|
||||
|
||||
void cb710_pci_update_config_reg(struct pci_dev *pdev,
|
||||
int reg, uint32_t and, uint32_t xor);
|
||||
void cb710_set_irq_handler(struct cb710_slot *slot,
|
||||
cb710_irq_handler_t handler);
|
||||
|
||||
/* some device struct walking */
|
||||
|
||||
static inline struct cb710_slot *cb710_pdev_to_slot(
|
||||
struct platform_device *pdev)
|
||||
{
|
||||
return container_of(pdev, struct cb710_slot, pdev);
|
||||
}
|
||||
|
||||
static inline struct cb710_chip *cb710_slot_to_chip(struct cb710_slot *slot)
|
||||
{
|
||||
return dev_get_drvdata(slot->pdev.dev.parent);
|
||||
}
|
||||
|
||||
static inline struct device *cb710_slot_dev(struct cb710_slot *slot)
|
||||
{
|
||||
return &slot->pdev.dev;
|
||||
}
|
||||
|
||||
static inline struct device *cb710_chip_dev(struct cb710_chip *chip)
|
||||
{
|
||||
return &chip->pdev->dev;
|
||||
}
|
||||
|
||||
/* debugging aids */
|
||||
|
||||
#ifdef CONFIG_CB710_DEBUG
|
||||
void cb710_dump_regs(struct cb710_chip *chip, unsigned dump);
|
||||
#else
|
||||
#define cb710_dump_regs(c, d) do {} while (0)
|
||||
#endif
|
||||
|
||||
#define CB710_DUMP_REGS_MMC 0x0F
|
||||
#define CB710_DUMP_REGS_MS 0x30
|
||||
#define CB710_DUMP_REGS_SM 0xC0
|
||||
#define CB710_DUMP_REGS_ALL 0xFF
|
||||
#define CB710_DUMP_REGS_MASK 0xFF
|
||||
|
||||
#define CB710_DUMP_ACCESS_8 0x100
|
||||
#define CB710_DUMP_ACCESS_16 0x200
|
||||
#define CB710_DUMP_ACCESS_32 0x400
|
||||
#define CB710_DUMP_ACCESS_ALL 0x700
|
||||
#define CB710_DUMP_ACCESS_MASK 0x700
|
||||
|
||||
#endif /* LINUX_CB710_DRIVER_H */
|
||||
/*
|
||||
* cb710/sgbuf2.h
|
||||
*
|
||||
* Copyright by Michał Mirosław, 2008-2009
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License version 2 as
|
||||
* published by the Free Software Foundation.
|
||||
*/
|
||||
#ifndef LINUX_CB710_SG_H
|
||||
#define LINUX_CB710_SG_H
|
||||
|
||||
#include <linux/highmem.h>
|
||||
#include <linux/scatterlist.h>
|
||||
|
||||
/**
|
||||
* cb710_sg_miter_stop_writing - stop mapping iteration after writing
|
||||
* @miter: sg mapping iter to be stopped
|
||||
*
|
||||
* Description:
|
||||
* Stops mapping iterator @miter. @miter should have been started
|
||||
* started using sg_miter_start(). A stopped iteration can be
|
||||
* resumed by calling sg_miter_next() on it. This is useful when
|
||||
* resources (kmap) need to be released during iteration.
|
||||
*
|
||||
* This is a convenience wrapper that will be optimized out for arches
|
||||
* that don't need flush_kernel_dcache_page().
|
||||
*
|
||||
* Context:
|
||||
* IRQ disabled if the SG_MITER_ATOMIC is set. Don't care otherwise.
|
||||
*/
|
||||
static inline void cb710_sg_miter_stop_writing(struct sg_mapping_iter *miter)
|
||||
{
|
||||
if (miter->page)
|
||||
flush_kernel_dcache_page(miter->page);
|
||||
sg_miter_stop(miter);
|
||||
}
|
||||
|
||||
/*
|
||||
* 32-bit PIO mapping sg iterator
|
||||
*
|
||||
* Hides scatterlist access issues - fragment boundaries, alignment, page
|
||||
* mapping - for drivers using 32-bit-word-at-a-time-PIO (ie. PCI devices
|
||||
* without DMA support).
|
||||
*
|
||||
* Best-case reading (transfer from device):
|
||||
* sg_miter_start();
|
||||
* cb710_sg_dwiter_write_from_io();
|
||||
* cb710_sg_miter_stop_writing();
|
||||
*
|
||||
* Best-case writing (transfer to device):
|
||||
* sg_miter_start();
|
||||
* cb710_sg_dwiter_read_to_io();
|
||||
* sg_miter_stop();
|
||||
*/
|
||||
|
||||
uint32_t cb710_sg_dwiter_read_next_block(struct sg_mapping_iter *miter);
|
||||
void cb710_sg_dwiter_write_next_block(struct sg_mapping_iter *miter, uint32_t data);
|
||||
|
||||
/**
|
||||
* cb710_sg_dwiter_write_from_io - transfer data to mapped buffer from 32-bit IO port
|
||||
* @miter: sg mapping iter
|
||||
* @port: PIO port - IO or MMIO address
|
||||
* @count: number of 32-bit words to transfer
|
||||
*
|
||||
* Description:
|
||||
* Reads @count 32-bit words from register @port and stores it in
|
||||
* buffer iterated by @miter. Data that would overflow the buffer
|
||||
* is silently ignored. Iterator is advanced by 4*@count bytes
|
||||
* or to the buffer's end whichever is closer.
|
||||
*
|
||||
* Context:
|
||||
* IRQ disabled if the SG_MITER_ATOMIC is set. Don't care otherwise.
|
||||
*/
|
||||
static inline void cb710_sg_dwiter_write_from_io(struct sg_mapping_iter *miter,
|
||||
void __iomem *port, size_t count)
|
||||
{
|
||||
while (count-- > 0)
|
||||
cb710_sg_dwiter_write_next_block(miter, ioread32(port));
|
||||
}
|
||||
|
||||
/**
|
||||
* cb710_sg_dwiter_read_to_io - transfer data to 32-bit IO port from mapped buffer
|
||||
* @miter: sg mapping iter
|
||||
* @port: PIO port - IO or MMIO address
|
||||
* @count: number of 32-bit words to transfer
|
||||
*
|
||||
* Description:
|
||||
* Writes @count 32-bit words to register @port from buffer iterated
|
||||
* through @miter. If buffer ends before @count words are written
|
||||
* missing data is replaced by zeroes. @miter is advanced by 4*@count
|
||||
* bytes or to the buffer's end whichever is closer.
|
||||
*
|
||||
* Context:
|
||||
* IRQ disabled if the SG_MITER_ATOMIC is set. Don't care otherwise.
|
||||
*/
|
||||
static inline void cb710_sg_dwiter_read_to_io(struct sg_mapping_iter *miter,
|
||||
void __iomem *port, size_t count)
|
||||
{
|
||||
while (count-- > 0)
|
||||
iowrite32(cb710_sg_dwiter_read_next_block(miter), port);
|
||||
}
|
||||
|
||||
#endif /* LINUX_CB710_SG_H */
|
||||
@ -2127,6 +2127,7 @@
|
||||
#define PCI_VENDOR_ID_MAINPINE 0x1522
|
||||
#define PCI_DEVICE_ID_MAINPINE_PBRIDGE 0x0100
|
||||
#define PCI_VENDOR_ID_ENE 0x1524
|
||||
#define PCI_DEVICE_ID_ENE_CB710_FLASH 0x0510
|
||||
#define PCI_DEVICE_ID_ENE_CB712_SD 0x0550
|
||||
#define PCI_DEVICE_ID_ENE_CB712_SD_2 0x0551
|
||||
#define PCI_DEVICE_ID_ENE_CB714_SD 0x0750
|
||||
|
||||
Loading…
Reference in New Issue
Block a user