/*
* mss_sdhci.c - SD Host Controller interface driver
*
* Copyright (C) 2007 Intel Corporation
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License Version 2 only
* for now as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/*
* derived from linux/drivers/mmc/sdhci.c
* Copyright (c) 2005 Pierre Ossman
*/
#include <linux/delay.h>
#include <linux/highmem.h>
#include <linux/pci.h>
#include <linux/dma-mapping.h>
#include <linux/proc_fs.h>
#include <asm/byteorder.h>
#include <asm/scatterlist.h>
#include <linux/mmc/mss_core.h>
#include <linux/mmc/mmc_protocol.h>
#include "mss_sdhci.h"
#define DRIVER_NAME "sdhci"
#define BUGMAIL " "
#define DBG(f, x...) \
pr_debug(DRIVER_NAME " [%s()]: " f, __func__,## x)
static unsigned int debug_nodma = 0;
static unsigned int debug_forcedma = 0;
static unsigned int debug_quirks = 0;
#define SDHCI_QUIRK_CLOCK_BEFORE_RESET (1<<0)
#define SDHCI_QUIRK_FORCE_DMA (1<<1)
/* Controller doesn't like some resets when there is no card inserted. */
#define SDHCI_QUIRK_NO_CARD_NO_RESET (1<<2)
#define SDHCI_QUIRK_SINGLE_POWER_WRITE (1<<3)
static const struct pci_device_id pci_ids[] __devinitdata = {
{
.vendor = PCI_VENDOR_ID_RICOH,
.device = PCI_DEVICE_ID_RICOH_R5C822,
.subvendor = PCI_VENDOR_ID_IBM,
.subdevice = PCI_ANY_ID,
.driver_data = SDHCI_QUIRK_CLOCK_BEFORE_RESET |
SDHCI_QUIRK_FORCE_DMA,
},
{
.vendor = PCI_VENDOR_ID_RICOH,
.device = PCI_DEVICE_ID_RICOH_R5C822,
.subvendor = PCI_ANY_ID,
.subdevice = PCI_ANY_ID,
.driver_data = SDHCI_QUIRK_FORCE_DMA |
SDHCI_QUIRK_NO_CARD_NO_RESET,
},
{
.vendor = PCI_VENDOR_ID_TI,
.device = PCI_DEVICE_ID_TI_XX21_XX11_SD,
.subvendor = PCI_ANY_ID,
.subdevice = PCI_ANY_ID,
.driver_data = SDHCI_QUIRK_FORCE_DMA,
},
{
.vendor = PCI_VENDOR_ID_ENE,
.device = PCI_DEVICE_ID_ENE_CB712_SD,
.subvendor = PCI_ANY_ID,
.subdevice = PCI_ANY_ID,
.driver_data = SDHCI_QUIRK_SINGLE_POWER_WRITE,
},
{ /* Generic SD host controller */
PCI_DEVICE_CLASS((PCI_CLASS_SYSTEM_SDHCI << 8), 0xFFFF00)
},
{ /* end: all zeroes */ },
};
MODULE_DEVICE_TABLE(pci, pci_ids);
static void sdhci_prepare_data(struct sdhci_host *, struct mss_data *);
static void sdhci_finish_data(struct sdhci_host *);
static void sdhci_send_command(struct sdhci_host *, struct mss_cmd *);
static void sdhci_finish_command(struct sdhci_host *);
struct proc_dir_entry *dir_sdhci = NULL;
static inline struct sdhci_host* slot_to_host(struct mss_slot *slot)
{
return (struct sdhci_host*)(slot->private);
}
static inline struct sdhci_host* mss_to_host(struct mss_host *mss)
{
return (struct sdhci_host*)(mss->private);
}
static void sdhci_dumpregs(struct sdhci_host *host)
{
printk(KERN_DEBUG DRIVER_NAME ": ============== REGISTER DUMP ==============\n");
printk(KERN_DEBUG DRIVER_NAME ": Sys addr: 0x%08x | Version: 0x%08x\n",
readl(host->ioaddr + SDHCI_DMA_ADDRESS),
readw(host->ioaddr + SDHCI_HOST_VERSION));
printk(KERN_DEBUG DRIVER_NAME ": Blk size: 0x%08x | Blk cnt: 0x%08x\n",
readw(host->ioaddr + SDHCI_BLOCK_SIZE),
readw(host->ioaddr + SDHCI_BLOCK_COUNT));
printk(KERN_DEBUG DRIVER_NAME ": Argument: 0x%08x | Trn mode: 0x%08x\n",
readl(host->ioaddr + SDHCI_ARGUMENT),
readw(host->ioaddr + SDHCI_TRANSFER_MODE));
printk(KERN_DEBUG DRIVER_NAME ": Present: 0x%08x | Host ctl: 0x%08x\n",
readl(host->ioaddr + SDHCI_PRESENT_STATE),
readb(host->ioaddr + SDHCI_HOST_CONTROL));
printk(KERN_DEBUG DRIVER_NAME ": Power: 0x%08x | Blk gap: 0x%08x\n",
readb(host->ioaddr + SDHCI_POWER_CONTROL),
readb(host->ioaddr + SDHCI_BLOCK_GAP_CONTROL));
printk(KERN_DEBUG DRIVER_NAME ": Wake-up: 0x%08x | Clock: 0x%08x\n",
readb(host->ioaddr + SDHCI_WALK_UP_CONTROL),
readw(host->ioaddr + SDHCI_CLOCK_CONTROL));
printk(KERN_DEBUG DRIVER_NAME ": Timeout: 0x%08x | Int stat: 0x%08x\n",
readb(host->ioaddr + SDHCI_TIMEOUT_CONTROL),
readl(host->ioaddr + SDHCI_INT_STATUS));
printk(KERN_DEBUG DRIVER_NAME ": Int enab: 0x%08x | Sig enab: 0x%08x\n",
readl(host->ioaddr + SDHCI_INT_ENABLE),
readl(host->ioaddr + SDHCI_SIGNAL_ENABLE));
printk(KERN_DEBUG DRIVER_NAME ": AC12 err: 0x%08x | Slot int: 0x%08x\n",
readw(host->ioaddr + SDHCI_ACMD12_ERR),
readw(host->ioaddr + SDHCI_SLOT_INT_STATUS));
printk(KERN_DEBUG DRIVER_NAME ": Caps: 0x%08x | Max curr: 0x%08x\n",
readl(host->ioaddr + SDHCI_CAPABILITIES),
readl(host->ioaddr + SDHCI_MAX_CURRENT));
printk(KERN_DEBUG DRIVER_NAME ": ===========================================\n");
}
#ifdef CONFIG_PROC_FS
static int sdhci_read_proc(char* page, char** start, off_t off, int count, int* eof, void* data) {
int len = 0;
struct sdhci_host *host=(struct sdhci_host *)data;
if (host == NULL) goto done;
len += sprintf(page+len, DRIVER_NAME ": ============== REGISTER DUMP ==============\n");
len += sprintf(page+len, DRIVER_NAME ": Sys addr: 0x%08x | Version: 0x%08x\n",
readl(host->ioaddr + SDHCI_DMA_ADDRESS),
readw(host->ioaddr + SDHCI_HOST_VERSION));
len += sprintf(page+len, DRIVER_NAME ": Blk size: 0x%08x | Blk cnt: 0x%08x\n",
readw(host->ioaddr + SDHCI_BLOCK_SIZE),
readw(host->ioaddr + SDHCI_BLOCK_COUNT));
len += sprintf(page+len, DRIVER_NAME ": Argument: 0x%08x | Trn mode: 0x%08x\n",
readl(host->ioaddr + SDHCI_ARGUMENT),
readw(host->ioaddr + SDHCI_TRANSFER_MODE));
len += sprintf(page+len, DRIVER_NAME ": Present: 0x%08x | Host ctl: 0x%08x\n",
readl(host->ioaddr + SDHCI_PRESENT_STATE),
readb(host->ioaddr + SDHCI_HOST_CONTROL));
len += sprintf(page+len, DRIVER_NAME ": Power: 0x%08x | Blk gap: 0x%08x\n",
readb(host->ioaddr + SDHCI_POWER_CONTROL),
readb(host->ioaddr + SDHCI_BLOCK_GAP_CONTROL));
len += sprintf(page+len, DRIVER_NAME ": Wake-up: 0x%08x | Clock: 0x%08x\n",
readb(host->ioaddr + SDHCI_WALK_UP_CONTROL),
readw(host->ioaddr + SDHCI_CLOCK_CONTROL));
len += sprintf(page+len, DRIVER_NAME ": Timeout: 0x%08x | Int stat: 0x%08x\n",
readb(host->ioaddr + SDHCI_TIMEOUT_CONTROL),
readl(host->ioaddr + SDHCI_INT_STATUS));
len += sprintf(page+len, DRIVER_NAME ": Int enab: 0x%08x | Sig enab: 0x%08x\n",
readl(host->ioaddr + SDHCI_INT_ENABLE),
readl(host->ioaddr + SDHCI_SIGNAL_ENABLE));
len += sprintf(page+len, DRIVER_NAME ": AC12 err: 0x%08x | Slot int: 0x%08x\n",
readw(host->ioaddr + SDHCI_ACMD12_ERR
