mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-23 12:43:55 +08:00
d366b64363
mmc_hostname() returns a pointer to the hostname for the mmc_host. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2014 lines
39 KiB
C
2014 lines
39 KiB
C
/*
|
|
* linux/drivers/mmc/wbsd.c - Winbond W83L51xD SD/MMC driver
|
|
*
|
|
* Copyright (C) 2004-2005 Pierre Ossman, All Rights Reserved.
|
|
*
|
|
* 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.
|
|
*
|
|
*
|
|
* Warning!
|
|
*
|
|
* Changes to the FIFO system should be done with extreme care since
|
|
* the hardware is full of bugs related to the FIFO. Known issues are:
|
|
*
|
|
* - FIFO size field in FSR is always zero.
|
|
*
|
|
* - FIFO interrupts tend not to work as they should. Interrupts are
|
|
* triggered only for full/empty events, not for threshold values.
|
|
*
|
|
* - On APIC systems the FIFO empty interrupt is sometimes lost.
|
|
*/
|
|
|
|
#include <linux/config.h>
|
|
#include <linux/module.h>
|
|
#include <linux/moduleparam.h>
|
|
#include <linux/init.h>
|
|
#include <linux/ioport.h>
|
|
#include <linux/device.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/dma-mapping.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/pnp.h>
|
|
#include <linux/highmem.h>
|
|
#include <linux/mmc/host.h>
|
|
#include <linux/mmc/protocol.h>
|
|
|
|
#include <asm/io.h>
|
|
#include <asm/dma.h>
|
|
#include <asm/scatterlist.h>
|
|
|
|
#include "wbsd.h"
|
|
|
|
#define DRIVER_NAME "wbsd"
|
|
#define DRIVER_VERSION "1.3"
|
|
|
|
#ifdef CONFIG_MMC_DEBUG
|
|
#define DBG(x...) \
|
|
printk(KERN_DEBUG DRIVER_NAME ": " x)
|
|
#define DBGF(f, x...) \
|
|
printk(KERN_DEBUG DRIVER_NAME " [%s()]: " f, __func__ , ##x)
|
|
#else
|
|
#define DBG(x...) do { } while (0)
|
|
#define DBGF(x...) do { } while (0)
|
|
#endif
|
|
|
|
/*
|
|
* Device resources
|
|
*/
|
|
|
|
#ifdef CONFIG_PNP
|
|
|
|
static const struct pnp_device_id pnp_dev_table[] = {
|
|
{ "WEC0517", 0 },
|
|
{ "WEC0518", 0 },
|
|
{ "", 0 },
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(pnp, pnp_dev_table);
|
|
|
|
#endif /* CONFIG_PNP */
|
|
|
|
static const int config_ports[] = { 0x2E, 0x4E };
|
|
static const int unlock_codes[] = { 0x83, 0x87 };
|
|
|
|
static const int valid_ids[] = {
|
|
0x7112,
|
|
};
|
|
|
|
#ifdef CONFIG_PNP
|
|
static unsigned int nopnp = 0;
|
|
#else
|
|
static const unsigned int nopnp = 1;
|
|
#endif
|
|
static unsigned int io = 0x248;
|
|
static unsigned int irq = 6;
|
|
static int dma = 2;
|
|
|
|
/*
|
|
* Basic functions
|
|
*/
|
|
|
|
static inline void wbsd_unlock_config(struct wbsd_host* host)
|
|
{
|
|
BUG_ON(host->config == 0);
|
|
|
|
outb(host->unlock_code, host->config);
|
|
outb(host->unlock_code, host->config);
|
|
}
|
|
|
|
static inline void wbsd_lock_config(struct wbsd_host* host)
|
|
{
|
|
BUG_ON(host->config == 0);
|
|
|
|
outb(LOCK_CODE, host->config);
|
|
}
|
|
|
|
static inline void wbsd_write_config(struct wbsd_host* host, u8 reg, u8 value)
|
|
{
|
|
BUG_ON(host->config == 0);
|
|
|
|
outb(reg, host->config);
|
|
outb(value, host->config + 1);
|
|
}
|
|
|
|
static inline u8 wbsd_read_config(struct wbsd_host* host, u8 reg)
|
|
{
|
|
BUG_ON(host->config == 0);
|
|
|
|
outb(reg, host->config);
|
|
return inb(host->config + 1);
|
|
}
|
|
|
|
static inline void wbsd_write_index(struct wbsd_host* host, u8 index, u8 value)
|
|
{
|
|
outb(index, host->base + WBSD_IDXR);
|
|
outb(value, host->base + WBSD_DATAR);
|
|
}
|
|
|
|
static inline u8 wbsd_read_index(struct wbsd_host* host, u8 index)
|
|
{
|
|
outb(index, host->base + WBSD_IDXR);
|
|
return inb(host->base + WBSD_DATAR);
|
|
}
|
|
|
|
/*
|
|
* Common routines
|
|
*/
|
|
|
|
static void wbsd_init_device(struct wbsd_host* host)
|
|
{
|
|
u8 setup, ier;
|
|
|
|
/*
|
|
* Reset chip (SD/MMC part) and fifo.
|
|
*/
|
|
setup = wbsd_read_index(host, WBSD_IDX_SETUP);
|
|
setup |= WBSD_FIFO_RESET | WBSD_SOFT_RESET;
|
|
wbsd_write_index(host, WBSD_IDX_SETUP, setup);
|
|
|
|
/*
|
|
* Set DAT3 to input
|
|
*/
|
|
setup &= ~WBSD_DAT3_H;
|
|
wbsd_write_index(host, WBSD_IDX_SETUP, setup);
|
|
host->flags &= ~WBSD_FIGNORE_DETECT;
|
|
|
|
/*
|
|
* Read back default clock.
|
|
*/
|
|
host->clk = wbsd_read_index(host, WBSD_IDX_CLK);
|
|
|
|
/*
|
|
* Power down port.
|
|
*/
|
|
outb(WBSD_POWER_N, host->base + WBSD_CSR);
|
|
|
|
/*
|
|
* Set maximum timeout.
|
|
*/
|
|
wbsd_write_index(host, WBSD_IDX_TAAC, 0x7F);
|
|
|
|
/*
|
|
* Test for card presence
|
|
*/
|
|
if (inb(host->base + WBSD_CSR) & WBSD_CARDPRESENT)
|
|
host->flags |= WBSD_FCARD_PRESENT;
|
|
else
|
|
host->flags &= ~WBSD_FCARD_PRESENT;
|
|
|
|
/*
|
|
* Enable interesting interrupts.
|
|
*/
|
|
ier = 0;
|
|
ier |= WBSD_EINT_CARD;
|
|
ier |= WBSD_EINT_FIFO_THRE;
|
|
ier |= WBSD_EINT_CCRC;
|
|
ier |= WBSD_EINT_TIMEOUT;
|
|
ier |= WBSD_EINT_CRC;
|
|
ier |= WBSD_EINT_TC;
|
|
|
|
outb(ier, host->base + WBSD_EIR);
|
|
|
|
/*
|
|
* Clear interrupts.
|
|
*/
|
|
inb(host->base + WBSD_ISR);
|
|
}
|
|
|
|
static void wbsd_reset(struct wbsd_host* host)
|
|
{
|
|
u8 setup;
|
|
|
|
printk(KERN_ERR DRIVER_NAME ": Resetting chip\n");
|
|
|
|
/*
|
|
* Soft reset of chip (SD/MMC part).
|
|
*/
|
|
setup = wbsd_read_index(host, WBSD_IDX_SETUP);
|
|
setup |= WBSD_SOFT_RESET;
|
|
wbsd_write_index(host, WBSD_IDX_SETUP, setup);
|
|
}
|
|
|
|
static void wbsd_request_end(struct wbsd_host* host, struct mmc_request* mrq)
|
|
{
|
|
unsigned long dmaflags;
|
|
|
|
DBGF("Ending request, cmd (%x)\n", mrq->cmd->opcode);
|
|
|
|
if (host->dma >= 0)
|
|
{
|
|
/*
|
|
* Release ISA DMA controller.
|
|
*/
|
|
dmaflags = claim_dma_lock();
|
|
disable_dma(host->dma);
|
|
clear_dma_ff(host->dma);
|
|
release_dma_lock(dmaflags);
|
|
|
|
/*
|
|
* Disable DMA on host.
|
|
*/
|
|
wbsd_write_index(host, WBSD_IDX_DMA, 0);
|
|
}
|
|
|
|
host->mrq = NULL;
|
|
|
|
/*
|
|
* MMC layer might call back into the driver so first unlock.
|
|
*/
|
|
spin_unlock(&host->lock);
|
|
mmc_request_done(host->mmc, mrq);
|
|
spin_lock(&host->lock);
|
|
}
|
|
|
|
/*
|
|
* Scatter/gather functions
|
|
*/
|
|
|
|
static inline void wbsd_init_sg(struct wbsd_host* host, struct mmc_data* data)
|
|
{
|
|
/*
|
|
* Get info. about SG list from data structure.
|
|
*/
|
|
host->cur_sg = data->sg;
|
|
host->num_sg = data->sg_len;
|
|
|
|
host->offset = 0;
|
|
host->remain = host->cur_sg->length;
|
|
}
|
|
|
|
static inline int wbsd_next_sg(struct wbsd_host* host)
|
|
{
|
|
/*
|
|
* Skip to next SG entry.
|
|
*/
|
|
host->cur_sg++;
|
|
host->num_sg--;
|
|
|
|
/*
|
|
* Any entries left?
|
|
*/
|
|
if (host->num_sg > 0)
|
|
{
|
|
host->offset = 0;
|
|
host->remain = host->cur_sg->length;
|
|
}
|
|
|
|
return host->num_sg;
|
|
}
|
|
|
|
static inline char* wbsd_kmap_sg(struct wbsd_host* host)
|
|
{
|
|
host->mapped_sg = kmap_atomic(host->cur_sg->page, KM_BIO_SRC_IRQ) +
|
|
host->cur_sg->offset;
|
|
return host->mapped_sg;
|
|
}
|
|
|
|
static inline void wbsd_kunmap_sg(struct wbsd_host* host)
|
|
{
|
|
kunmap_atomic(host->mapped_sg, KM_BIO_SRC_IRQ);
|
|
}
|
|
|
|
static inline void wbsd_sg_to_dma(struct wbsd_host* host, struct mmc_data* data)
|
|
{
|
|
unsigned int len, i, size;
|
|
struct scatterlist* sg;
|
|
char* dmabuf = host->dma_buffer;
|
|
char* sgbuf;
|
|
|
|
size = host->size;
|
|
|
|
sg = data->sg;
|
|
len = data->sg_len;
|
|
|
|
/*
|
|
* Just loop through all entries. Size might not
|
|
* be the entire list though so make sure that
|
|
* we do not transfer too much.
|
|
*/
|
|
for (i = 0;i < len;i++)
|
|
{
|
|
sgbuf = kmap_atomic(sg[i].page, KM_BIO_SRC_IRQ) + sg[i].offset;
|
|
if (size < sg[i].length)
|
|
memcpy(dmabuf, sgbuf, size);
|
|
else
|
|
memcpy(dmabuf, sgbuf, sg[i].length);
|
|
kunmap_atomic(sgbuf, KM_BIO_SRC_IRQ);
|
|
dmabuf += sg[i].length;
|
|
|
|
if (size < sg[i].length)
|
|
size = 0;
|
|
else
|
|
size -= sg[i].length;
|
|
|
|
if (size == 0)
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Check that we didn't get a request to transfer
|
|
* more data than can fit into the SG list.
|
|
*/
|
|
|
|
BUG_ON(size != 0);
|
|
|
|
host->size -= size;
|
|
}
|
|
|
|
static inline void wbsd_dma_to_sg(struct wbsd_host* host, struct mmc_data* data)
|
|
{
|
|
unsigned int len, i, size;
|
|
struct scatterlist* sg;
|
|
char* dmabuf = host->dma_buffer;
|
|
char* sgbuf;
|
|
|
|
size = host->size;
|
|
|
|
sg = data->sg;
|
|
len = data->sg_len;
|
|
|
|
/*
|
|
* Just loop through all entries. Size might not
|
|
* be the entire list though so make sure that
|
|
* we do not transfer too much.
|
|
*/
|
|
for (i = 0;i < len;i++)
|
|
{
|
|
sgbuf = kmap_atomic(sg[i].page, KM_BIO_SRC_IRQ) + sg[i].offset;
|
|
if (size < sg[i].length)
|
|
memcpy(sgbuf, dmabuf, size);
|
|
else
|
|
memcpy(sgbuf, dmabuf, sg[i].length);
|
|
kunmap_atomic(sgbuf, KM_BIO_SRC_IRQ);
|
|
dmabuf += sg[i].length;
|
|
|
|
if (size < sg[i].length)
|
|
size = 0;
|
|
else
|
|
size -= sg[i].length;
|
|
|
|
if (size == 0)
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Check that we didn't get a request to transfer
|
|
* more data than can fit into the SG list.
|
|
*/
|
|
|
|
BUG_ON(size != 0);
|
|
|
|
host->size -= size;
|
|
}
|
|
|
|
/*
|
|
* Command handling
|
|
*/
|
|
|
|
static inline void wbsd_get_short_reply(struct wbsd_host* host,
|
|
struct mmc_command* cmd)
|
|
{
|
|
/*
|
|
* Correct response type?
|
|
*/
|
|
if (wbsd_read_index(host, WBSD_IDX_RSPLEN) != WBSD_RSP_SHORT)
|
|
{
|
|
cmd->error = MMC_ERR_INVALID;
|
|
return;
|
|
}
|
|
|
|
cmd->resp[0] =
|
|
wbsd_read_index(host, WBSD_IDX_RESP12) << 24;
|
|
cmd->resp[0] |=
|
|
wbsd_read_index(host, WBSD_IDX_RESP13) << 16;
|
|
cmd->resp[0] |=
|
|
wbsd_read_index(host, WBSD_IDX_RESP14) << 8;
|
|
cmd->resp[0] |=
|
|
wbsd_read_index(host, WBSD_IDX_RESP15) << 0;
|
|
cmd->resp[1] =
|
|
wbsd_read_index(host, WBSD_IDX_RESP16) << 24;
|
|
}
|
|
|
|
static inline void wbsd_get_long_reply(struct wbsd_host* host,
|
|
struct mmc_command* cmd)
|
|
{
|
|
int i;
|
|
|
|
/*
|
|
* Correct response type?
|
|
*/
|
|
if (wbsd_read_index(host, WBSD_IDX_RSPLEN) != WBSD_RSP_LONG)
|
|
{
|
|
cmd->error = MMC_ERR_INVALID;
|
|
return;
|
|
}
|
|
|
|
for (i = 0;i < 4;i++)
|
|
{
|
|
cmd->resp[i] =
|
|
wbsd_read_index(host, WBSD_IDX_RESP1 + i * 4) << 24;
|
|
cmd->resp[i] |=
|
|
wbsd_read_index(host, WBSD_IDX_RESP2 + i * 4) << 16;
|
|
cmd->resp[i] |=
|
|
wbsd_read_index(host, WBSD_IDX_RESP3 + i * 4) << 8;
|
|
cmd->resp[i] |=
|
|
wbsd_read_index(host, WBSD_IDX_RESP4 + i * 4) << 0;
|
|
}
|
|
}
|
|
|
|
static void wbsd_send_command(struct wbsd_host* host, struct mmc_command* cmd)
|
|
{
|
|
int i;
|
|
u8 status, isr;
|
|
|
|
DBGF("Sending cmd (%x)\n", cmd->opcode);
|
|
|
|
/*
|
|
* Clear accumulated ISR. The interrupt routine
|
|
* will fill this one with events that occur during
|
|
* transfer.
|
|
*/
|
|
host->isr = 0;
|
|
|
|
/*
|
|
* Send the command (CRC calculated by host).
|
|
*/
|
|
outb(cmd->opcode, host->base + WBSD_CMDR);
|
|
for (i = 3;i >= 0;i--)
|
|
outb((cmd->arg >> (i * 8)) & 0xff, host->base + WBSD_CMDR);
|
|
|
|
cmd->error = MMC_ERR_NONE;
|
|
|
|
/*
|
|
* Wait for the request to complete.
|
|
*/
|
|
do {
|
|
status = wbsd_read_index(host, WBSD_IDX_STATUS);
|
|
} while (status & WBSD_CARDTRAFFIC);
|
|
|
|
/*
|
|
* Do we expect a reply?
|
|
*/
|
|
if ((cmd->flags & MMC_RSP_MASK) != MMC_RSP_NONE)
|
|
{
|
|
/*
|
|
* Read back status.
|
|
*/
|
|
isr = host->isr;
|
|
|
|
/* Card removed? */
|
|
if (isr & WBSD_INT_CARD)
|
|
cmd->error = MMC_ERR_TIMEOUT;
|
|
/* Timeout? */
|
|
else if (isr & WBSD_INT_TIMEOUT)
|
|
cmd->error = MMC_ERR_TIMEOUT;
|
|
/* CRC? */
|
|
else if ((cmd->flags & MMC_RSP_CRC) && (isr & WBSD_INT_CRC))
|
|
cmd->error = MMC_ERR_BADCRC;
|
|
/* All ok */
|
|
else
|
|
{
|
|
if ((cmd->flags & MMC_RSP_MASK) == MMC_RSP_SHORT)
|
|
wbsd_get_short_reply(host, cmd);
|
|
else
|
|
wbsd_get_long_reply(host, cmd);
|
|
}
|
|
}
|
|
|
|
DBGF("Sent cmd (%x), res %d\n", cmd->opcode, cmd->error);
|
|
}
|
|
|
|
/*
|
|
* Data functions
|
|
*/
|
|
|
|
static void wbsd_empty_fifo(struct wbsd_host* host)
|
|
{
|
|
struct mmc_data* data = host->mrq->cmd->data;
|
|
char* buffer;
|
|
int i, fsr, fifo;
|
|
|
|
/*
|
|
* Handle excessive data.
|
|
*/
|
|
if (data->bytes_xfered == host->size)
|
|
return;
|
|
|
|
buffer = wbsd_kmap_sg(host) + host->offset;
|
|
|
|
/*
|
|
* Drain the fifo. This has a tendency to loop longer
|
|
* than the FIFO length (usually one block).
|
|
*/
|
|
while (!((fsr = inb(host->base + WBSD_FSR)) & WBSD_FIFO_EMPTY))
|
|
{
|
|
/*
|
|
* The size field in the FSR is broken so we have to
|
|
* do some guessing.
|
|
*/
|
|
if (fsr & WBSD_FIFO_FULL)
|
|
fifo = 16;
|
|
else if (fsr & WBSD_FIFO_FUTHRE)
|
|
fifo = 8;
|
|
else
|
|
fifo = 1;
|
|
|
|
for (i = 0;i < fifo;i++)
|
|
{
|
|
*buffer = inb(host->base + WBSD_DFR);
|
|
buffer++;
|
|
host->offset++;
|
|
host->remain--;
|
|
|
|
data->bytes_xfered++;
|
|
|
|
/*
|
|
* Transfer done?
|
|
*/
|
|
if (data->bytes_xfered == host->size)
|
|
{
|
|
wbsd_kunmap_sg(host);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* End of scatter list entry?
|
|
*/
|
|
if (host->remain == 0)
|
|
{
|
|
wbsd_kunmap_sg(host);
|
|
|
|
/*
|
|
* Get next entry. Check if last.
|
|
*/
|
|
if (!wbsd_next_sg(host))
|
|
{
|
|
/*
|
|
* We should never reach this point.
|
|
* It means that we're trying to
|
|
* transfer more blocks than can fit
|
|
* into the scatter list.
|
|
*/
|
|
BUG_ON(1);
|
|
|
|
host->size = data->bytes_xfered;
|
|
|
|
return;
|
|
}
|
|
|
|
buffer = wbsd_kmap_sg(host);
|
|
}
|
|
}
|
|
}
|
|
|
|
wbsd_kunmap_sg(host);
|
|
|
|
/*
|
|
* This is a very dirty hack to solve a
|
|
* hardware problem. The chip doesn't trigger
|
|
* FIFO threshold interrupts properly.
|
|
*/
|
|
if ((host->size - data->bytes_xfered) < 16)
|
|
tasklet_schedule(&host->fifo_tasklet);
|
|
}
|
|
|
|
static void wbsd_fill_fifo(struct wbsd_host* host)
|
|
{
|
|
struct mmc_data* data = host->mrq->cmd->data;
|
|
char* buffer;
|
|
int i, fsr, fifo;
|
|
|
|
/*
|
|
* Check that we aren't being called after the
|
|
* entire buffer has been transfered.
|
|
*/
|
|
if (data->bytes_xfered == host->size)
|
|
return;
|
|
|
|
buffer = wbsd_kmap_sg(host) + host->offset;
|
|
|
|
/*
|
|
* Fill the fifo. This has a tendency to loop longer
|
|
* than the FIFO length (usually one block).
|
|
*/
|
|
while (!((fsr = inb(host->base + WBSD_FSR)) & WBSD_FIFO_FULL))
|
|
{
|
|
/*
|
|
* The size field in the FSR is broken so we have to
|
|
* do some guessing.
|
|
*/
|
|
if (fsr & WBSD_FIFO_EMPTY)
|
|
fifo = 0;
|
|
else if (fsr & WBSD_FIFO_EMTHRE)
|
|
fifo = 8;
|
|
else
|
|
fifo = 15;
|
|
|
|
for (i = 16;i > fifo;i--)
|
|
{
|
|
outb(*buffer, host->base + WBSD_DFR);
|
|
buffer++;
|
|
host->offset++;
|
|
host->remain--;
|
|
|
|
data->bytes_xfered++;
|
|
|
|
/*
|
|
* Transfer done?
|
|
*/
|
|
if (data->bytes_xfered == host->size)
|
|
{
|
|
wbsd_kunmap_sg(host);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* End of scatter list entry?
|
|
*/
|
|
if (host->remain == 0)
|
|
{
|
|
wbsd_kunmap_sg(host);
|
|
|
|
/*
|
|
* Get next entry. Check if last.
|
|
*/
|
|
if (!wbsd_next_sg(host))
|
|
{
|
|
/*
|
|
* We should never reach this point.
|
|
* It means that we're trying to
|
|
* transfer more blocks than can fit
|
|
* into the scatter list.
|
|
*/
|
|
BUG_ON(1);
|
|
|
|
host->size = data->bytes_xfered;
|
|
|
|
return;
|
|
}
|
|
|
|
buffer = wbsd_kmap_sg(host);
|
|
}
|
|
}
|
|
}
|
|
|
|
wbsd_kunmap_sg(host);
|
|
|
|
/*
|
|
* The controller stops sending interrupts for
|
|
* 'FIFO empty' under certain conditions. So we
|
|
* need to be a bit more pro-active.
|
|
*/
|
|
tasklet_schedule(&host->fifo_tasklet);
|
|
}
|
|
|
|
static void wbsd_prepare_data(struct wbsd_host* host, struct mmc_data* data)
|
|
{
|
|
u16 blksize;
|
|
u8 setup;
|
|
unsigned long dmaflags;
|
|
|
|
DBGF("blksz %04x blks %04x flags %08x\n",
|
|
1 << data->blksz_bits, data->blocks, data->flags);
|
|
DBGF("tsac %d ms nsac %d clk\n",
|
|
data->timeout_ns / 1000000, data->timeout_clks);
|
|
|
|
/*
|
|
* Calculate size.
|
|
*/
|
|
host->size = data->blocks << data->blksz_bits;
|
|
|
|
/*
|
|
* Check timeout values for overflow.
|
|
* (Yes, some cards cause this value to overflow).
|
|
*/
|
|
if (data->timeout_ns > 127000000)
|
|
wbsd_write_index(host, WBSD_IDX_TAAC, 127);
|
|
else
|
|
wbsd_write_index(host, WBSD_IDX_TAAC, data->timeout_ns/1000000);
|
|
|
|
if (data->timeout_clks > 255)
|
|
wbsd_write_index(host, WBSD_IDX_NSAC, 255);
|
|
else
|
|
wbsd_write_index(host, WBSD_IDX_NSAC, data->timeout_clks);
|
|
|
|
/*
|
|
* Inform the chip of how large blocks will be
|
|
* sent. It needs this to determine when to
|
|
* calculate CRC.
|
|
*
|
|
* Space for CRC must be included in the size.
|
|
*/
|
|
blksize = (1 << data->blksz_bits) + 2;
|
|
|
|
wbsd_write_index(host, WBSD_IDX_PBSMSB, (blksize >> 4) & 0xF0);
|
|
wbsd_write_index(host, WBSD_IDX_PBSLSB, blksize & 0xFF);
|
|
|
|
/*
|
|
* Clear the FIFO. This is needed even for DMA
|
|
* transfers since the chip still uses the FIFO
|
|
* internally.
|
|
*/
|
|
setup = wbsd_read_index(host, WBSD_IDX_SETUP);
|
|
setup |= WBSD_FIFO_RESET;
|
|
wbsd_write_index(host, WBSD_IDX_SETUP, setup);
|
|
|
|
/*
|
|
* DMA transfer?
|
|
*/
|
|
if (host->dma >= 0)
|
|
{
|
|
/*
|
|
* The buffer for DMA is only 64 kB.
|
|
*/
|
|
BUG_ON(host->size > 0x10000);
|
|
if (host->size > 0x10000)
|
|
{
|
|
data->error = MMC_ERR_INVALID;
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Transfer data from the SG list to
|
|
* the DMA buffer.
|
|
*/
|
|
if (data->flags & MMC_DATA_WRITE)
|
|
wbsd_sg_to_dma(host, data);
|
|
|
|
/*
|
|
* Initialise the ISA DMA controller.
|
|
*/
|
|
dmaflags = claim_dma_lock();
|
|
disable_dma(host->dma);
|
|
clear_dma_ff(host->dma);
|
|
if (data->flags & MMC_DATA_READ)
|
|
set_dma_mode(host->dma, DMA_MODE_READ & ~0x40);
|
|
else
|
|
set_dma_mode(host->dma, DMA_MODE_WRITE & ~0x40);
|
|
set_dma_addr(host->dma, host->dma_addr);
|
|
set_dma_count(host->dma, host->size);
|
|
|
|
enable_dma(host->dma);
|
|
release_dma_lock(dmaflags);
|
|
|
|
/*
|
|
* Enable DMA on the host.
|
|
*/
|
|
wbsd_write_index(host, WBSD_IDX_DMA, WBSD_DMA_ENABLE);
|
|
}
|
|
else
|
|
{
|
|
/*
|
|
* This flag is used to keep printk
|
|
* output to a minimum.
|
|
*/
|
|
host->firsterr = 1;
|
|
|
|
/*
|
|
* Initialise the SG list.
|
|
*/
|
|
wbsd_init_sg(host, data);
|
|
|
|
/*
|
|
* Turn off DMA.
|
|
*/
|
|
wbsd_write_index(host, WBSD_IDX_DMA, 0);
|
|
|
|
/*
|
|
* Set up FIFO threshold levels (and fill
|
|
* buffer if doing a write).
|
|
*/
|
|
if (data->flags & MMC_DATA_READ)
|
|
{
|
|
wbsd_write_index(host, WBSD_IDX_FIFOEN,
|
|
WBSD_FIFOEN_FULL | 8);
|
|
}
|
|
else
|
|
{
|
|
wbsd_write_index(host, WBSD_IDX_FIFOEN,
|
|
WBSD_FIFOEN_EMPTY | 8);
|
|
wbsd_fill_fifo(host);
|
|
}
|
|
}
|
|
|
|
data->error = MMC_ERR_NONE;
|
|
}
|
|
|
|
static void wbsd_finish_data(struct wbsd_host* host, struct mmc_data* data)
|
|
{
|
|
unsigned long dmaflags;
|
|
int count;
|
|
u8 status;
|
|
|
|
WARN_ON(host->mrq == NULL);
|
|
|
|
/*
|
|
* Send a stop command if needed.
|
|
*/
|
|
if (data->stop)
|
|
wbsd_send_command(host, data->stop);
|
|
|
|
/*
|
|
* Wait for the controller to leave data
|
|
* transfer state.
|
|
*/
|
|
do
|
|
{
|
|
status = wbsd_read_index(host, WBSD_IDX_STATUS);
|
|
} while (status & (WBSD_BLOCK_READ | WBSD_BLOCK_WRITE));
|
|
|
|
/*
|
|
* DMA transfer?
|
|
*/
|
|
if (host->dma >= 0)
|
|
{
|
|
/*
|
|
* Disable DMA on the host.
|
|
*/
|
|
wbsd_write_index(host, WBSD_IDX_DMA, 0);
|
|
|
|
/*
|
|
* Turn of ISA DMA controller.
|
|
*/
|
|
dmaflags = claim_dma_lock();
|
|
disable_dma(host->dma);
|
|
clear_dma_ff(host->dma);
|
|
count = get_dma_residue(host->dma);
|
|
release_dma_lock(dmaflags);
|
|
|
|
/*
|
|
* Any leftover data?
|
|
*/
|
|
if (count)
|
|
{
|
|
printk(KERN_ERR DRIVER_NAME ": Incomplete DMA "
|
|
"transfer. %d bytes left.\n", count);
|
|
|
|
data->error = MMC_ERR_FAILED;
|
|
}
|
|
else
|
|
{
|
|
/*
|
|
* Transfer data from DMA buffer to
|
|
* SG list.
|
|
*/
|
|
if (data->flags & MMC_DATA_READ)
|
|
wbsd_dma_to_sg(host, data);
|
|
|
|
data->bytes_xfered = host->size;
|
|
}
|
|
}
|
|
|
|
DBGF("Ending data transfer (%d bytes)\n", data->bytes_xfered);
|
|
|
|
wbsd_request_end(host, host->mrq);
|
|
}
|
|
|
|
/*****************************************************************************\
|
|
* *
|
|
* MMC layer callbacks *
|
|
* *
|
|
\*****************************************************************************/
|
|
|
|
static void wbsd_request(struct mmc_host* mmc, struct mmc_request* mrq)
|
|
{
|
|
struct wbsd_host* host = mmc_priv(mmc);
|
|
struct mmc_command* cmd;
|
|
|
|
/*
|
|
* Disable tasklets to avoid a deadlock.
|
|
*/
|
|
spin_lock_bh(&host->lock);
|
|
|
|
BUG_ON(host->mrq != NULL);
|
|
|
|
cmd = mrq->cmd;
|
|
|
|
host->mrq = mrq;
|
|
|
|
/*
|
|
* If there is no card in the slot then
|
|
* timeout immediatly.
|
|
*/
|
|
if (!(host->flags & WBSD_FCARD_PRESENT))
|
|
{
|
|
cmd->error = MMC_ERR_TIMEOUT;
|
|
goto done;
|
|
}
|
|
|
|
/*
|
|
* Does the request include data?
|
|
*/
|
|
if (cmd->data)
|
|
{
|
|
wbsd_prepare_data(host, cmd->data);
|
|
|
|
if (cmd->data->error != MMC_ERR_NONE)
|
|
goto done;
|
|
}
|
|
|
|
wbsd_send_command(host, cmd);
|
|
|
|
/*
|
|
* If this is a data transfer the request
|
|
* will be finished after the data has
|
|
* transfered.
|
|
*/
|
|
if (cmd->data && (cmd->error == MMC_ERR_NONE))
|
|
{
|
|
/*
|
|
* Dirty fix for hardware bug.
|
|
*/
|
|
if (host->dma == -1)
|
|
tasklet_schedule(&host->fifo_tasklet);
|
|
|
|
spin_unlock_bh(&host->lock);
|
|
|
|
return;
|
|
}
|
|
|
|
done:
|
|
wbsd_request_end(host, mrq);
|
|
|
|
spin_unlock_bh(&host->lock);
|
|
}
|
|
|
|
static void wbsd_set_ios(struct mmc_host* mmc, struct mmc_ios* ios)
|
|
{
|
|
struct wbsd_host* host = mmc_priv(mmc);
|
|
u8 clk, setup, pwr;
|
|
|
|
DBGF("clock %uHz busmode %u powermode %u Vdd %u\n",
|
|
ios->clock, ios->bus_mode, ios->power_mode, ios->vdd);
|
|
|
|
spin_lock_bh(&host->lock);
|
|
|
|
/*
|
|
* Reset the chip on each power off.
|
|
* Should clear out any weird states.
|
|
*/
|
|
if (ios->power_mode == MMC_POWER_OFF)
|
|
wbsd_init_device(host);
|
|
|
|
if (ios->clock >= 24000000)
|
|
clk = WBSD_CLK_24M;
|
|
else if (ios->clock >= 16000000)
|
|
clk = WBSD_CLK_16M;
|
|
else if (ios->clock >= 12000000)
|
|
clk = WBSD_CLK_12M;
|
|
else
|
|
clk = WBSD_CLK_375K;
|
|
|
|
/*
|
|
* Only write to the clock register when
|
|
* there is an actual change.
|
|
*/
|
|
if (clk != host->clk)
|
|
{
|
|
wbsd_write_index(host, WBSD_IDX_CLK, clk);
|
|
host->clk = clk;
|
|
}
|
|
|
|
/*
|
|
* Power up card.
|
|
*/
|
|
if (ios->power_mode != MMC_POWER_OFF)
|
|
{
|
|
pwr = inb(host->base + WBSD_CSR);
|
|
pwr &= ~WBSD_POWER_N;
|
|
outb(pwr, host->base + WBSD_CSR);
|
|
}
|
|
|
|
/*
|
|
* MMC cards need to have pin 1 high during init.
|
|
* Init time corresponds rather nicely with the bus mode.
|
|
* It wreaks havoc with the card detection though so
|
|
* that needs to be disabed.
|
|
*/
|
|
setup = wbsd_read_index(host, WBSD_IDX_SETUP);
|
|
if ((ios->power_mode == MMC_POWER_ON) &&
|
|
(ios->bus_mode == MMC_BUSMODE_OPENDRAIN))
|
|
{
|
|
setup |= WBSD_DAT3_H;
|
|
host->flags |= WBSD_FIGNORE_DETECT;
|
|
}
|
|
else
|
|
{
|
|
setup &= ~WBSD_DAT3_H;
|
|
host->flags &= ~WBSD_FIGNORE_DETECT;
|
|
}
|
|
wbsd_write_index(host, WBSD_IDX_SETUP, setup);
|
|
|
|
spin_unlock_bh(&host->lock);
|
|
}
|
|
|
|
static struct mmc_host_ops wbsd_ops = {
|
|
.request = wbsd_request,
|
|
.set_ios = wbsd_set_ios,
|
|
};
|
|
|
|
/*****************************************************************************\
|
|
* *
|
|
* Interrupt handling *
|
|
* *
|
|
\*****************************************************************************/
|
|
|
|
/*
|
|
* Helper function for card detection
|
|
*/
|
|
static void wbsd_detect_card(unsigned long data)
|
|
{
|
|
struct wbsd_host *host = (struct wbsd_host*)data;
|
|
|
|
BUG_ON(host == NULL);
|
|
|
|
DBG("Executing card detection\n");
|
|
|
|
mmc_detect_change(host->mmc);
|
|
}
|
|
|
|
/*
|
|
* Tasklets
|
|
*/
|
|
|
|
static inline struct mmc_data* wbsd_get_data(struct wbsd_host* host)
|
|
{
|
|
WARN_ON(!host->mrq);
|
|
if (!host->mrq)
|
|
return NULL;
|
|
|
|
WARN_ON(!host->mrq->cmd);
|
|
if (!host->mrq->cmd)
|
|
return NULL;
|
|
|
|
WARN_ON(!host->mrq->cmd->data);
|
|
if (!host->mrq->cmd->data)
|
|
return NULL;
|
|
|
|
return host->mrq->cmd->data;
|
|
}
|
|
|
|
static void wbsd_tasklet_card(unsigned long param)
|
|
{
|
|
struct wbsd_host* host = (struct wbsd_host*)param;
|
|
u8 csr;
|
|
|
|
spin_lock(&host->lock);
|
|
|
|
if (host->flags & WBSD_FIGNORE_DETECT)
|
|
{
|
|
spin_unlock(&host->lock);
|
|
return;
|
|
}
|
|
|
|
csr = inb(host->base + WBSD_CSR);
|
|
WARN_ON(csr == 0xff);
|
|
|
|
if (csr & WBSD_CARDPRESENT)
|
|
{
|
|
if (!(host->flags & WBSD_FCARD_PRESENT))
|
|
{
|
|
DBG("Card inserted\n");
|
|
host->flags |= WBSD_FCARD_PRESENT;
|
|
|
|
/*
|
|
* Delay card detection to allow electrical connections
|
|
* to stabilise.
|
|
*/
|
|
mod_timer(&host->timer, jiffies + HZ/2);
|
|
}
|
|
|
|
spin_unlock(&host->lock);
|
|
}
|
|
else if (host->flags & WBSD_FCARD_PRESENT)
|
|
{
|
|
DBG("Card removed\n");
|
|
host->flags &= ~WBSD_FCARD_PRESENT;
|
|
|
|
if (host->mrq)
|
|
{
|
|
printk(KERN_ERR DRIVER_NAME
|
|
": Card removed during transfer!\n");
|
|
wbsd_reset(host);
|
|
|
|
host->mrq->cmd->error = MMC_ERR_FAILED;
|
|
tasklet_schedule(&host->finish_tasklet);
|
|
}
|
|
|
|
/*
|
|
* Unlock first since we might get a call back.
|
|
*/
|
|
spin_unlock(&host->lock);
|
|
|
|
mmc_detect_change(host->mmc);
|
|
}
|
|
}
|
|
|
|
static void wbsd_tasklet_fifo(unsigned long param)
|
|
{
|
|
struct wbsd_host* host = (struct wbsd_host*)param;
|
|
struct mmc_data* data;
|
|
|
|
spin_lock(&host->lock);
|
|
|
|
if (!host->mrq)
|
|
goto end;
|
|
|
|
data = wbsd_get_data(host);
|
|
if (!data)
|
|
goto end;
|
|
|
|
if (data->flags & MMC_DATA_WRITE)
|
|
wbsd_fill_fifo(host);
|
|
else
|
|
wbsd_empty_fifo(host);
|
|
|
|
/*
|
|
* Done?
|
|
*/
|
|
if (host->size == data->bytes_xfered)
|
|
{
|
|
wbsd_write_index(host, WBSD_IDX_FIFOEN, 0);
|
|
tasklet_schedule(&host->finish_tasklet);
|
|
}
|
|
|
|
end:
|
|
spin_unlock(&host->lock);
|
|
}
|
|
|
|
static void wbsd_tasklet_crc(unsigned long param)
|
|
{
|
|
struct wbsd_host* host = (struct wbsd_host*)param;
|
|
struct mmc_data* data;
|
|
|
|
spin_lock(&host->lock);
|
|
|
|
if (!host->mrq)
|
|
goto end;
|
|
|
|
data = wbsd_get_data(host);
|
|
if (!data)
|
|
goto end;
|
|
|
|
DBGF("CRC error\n");
|
|
|
|
data->error = MMC_ERR_BADCRC;
|
|
|
|
tasklet_schedule(&host->finish_tasklet);
|
|
|
|
end:
|
|
spin_unlock(&host->lock);
|
|
}
|
|
|
|
static void wbsd_tasklet_timeout(unsigned long param)
|
|
{
|
|
struct wbsd_host* host = (struct wbsd_host*)param;
|
|
struct mmc_data* data;
|
|
|
|
spin_lock(&host->lock);
|
|
|
|
if (!host->mrq)
|
|
goto end;
|
|
|
|
data = wbsd_get_data(host);
|
|
if (!data)
|
|
goto end;
|
|
|
|
DBGF("Timeout\n");
|
|
|
|
data->error = MMC_ERR_TIMEOUT;
|
|
|
|
tasklet_schedule(&host->finish_tasklet);
|
|
|
|
end:
|
|
spin_unlock(&host->lock);
|
|
}
|
|
|
|
static void wbsd_tasklet_finish(unsigned long param)
|
|
{
|
|
struct wbsd_host* host = (struct wbsd_host*)param;
|
|
struct mmc_data* data;
|
|
|
|
spin_lock(&host->lock);
|
|
|
|
WARN_ON(!host->mrq);
|
|
if (!host->mrq)
|
|
goto end;
|
|
|
|
data = wbsd_get_data(host);
|
|
if (!data)
|
|
goto end;
|
|
|
|
wbsd_finish_data(host, data);
|
|
|
|
end:
|
|
spin_unlock(&host->lock);
|
|
}
|
|
|
|
static void wbsd_tasklet_block(unsigned long param)
|
|
{
|
|
struct wbsd_host* host = (struct wbsd_host*)param;
|
|
struct mmc_data* data;
|
|
|
|
spin_lock(&host->lock);
|
|
|
|
if ((wbsd_read_index(host, WBSD_IDX_CRCSTATUS) & WBSD_CRC_MASK) !=
|
|
WBSD_CRC_OK)
|
|
{
|
|
data = wbsd_get_data(host);
|
|
if (!data)
|
|
goto end;
|
|
|
|
DBGF("CRC error\n");
|
|
|
|
data->error = MMC_ERR_BADCRC;
|
|
|
|
tasklet_schedule(&host->finish_tasklet);
|
|
}
|
|
|
|
end:
|
|
spin_unlock(&host->lock);
|
|
}
|
|
|
|
/*
|
|
* Interrupt handling
|
|
*/
|
|
|
|
static irqreturn_t wbsd_irq(int irq, void *dev_id, struct pt_regs *regs)
|
|
{
|
|
struct wbsd_host* host = dev_id;
|
|
int isr;
|
|
|
|
isr = inb(host->base + WBSD_ISR);
|
|
|
|
/*
|
|
* Was it actually our hardware that caused the interrupt?
|
|
*/
|
|
if (isr == 0xff || isr == 0x00)
|
|
return IRQ_NONE;
|
|
|
|
host->isr |= isr;
|
|
|
|
/*
|
|
* Schedule tasklets as needed.
|
|
*/
|
|
if (isr & WBSD_INT_CARD)
|
|
tasklet_schedule(&host->card_tasklet);
|
|
if (isr & WBSD_INT_FIFO_THRE)
|
|
tasklet_schedule(&host->fifo_tasklet);
|
|
if (isr & WBSD_INT_CRC)
|
|
tasklet_hi_schedule(&host->crc_tasklet);
|
|
if (isr & WBSD_INT_TIMEOUT)
|
|
tasklet_hi_schedule(&host->timeout_tasklet);
|
|
if (isr & WBSD_INT_BUSYEND)
|
|
tasklet_hi_schedule(&host->block_tasklet);
|
|
if (isr & WBSD_INT_TC)
|
|
tasklet_schedule(&host->finish_tasklet);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
/*****************************************************************************\
|
|
* *
|
|
* Device initialisation and shutdown *
|
|
* *
|
|
\*****************************************************************************/
|
|
|
|
/*
|
|
* Allocate/free MMC structure.
|
|
*/
|
|
|
|
static int __devinit wbsd_alloc_mmc(struct device* dev)
|
|
{
|
|
struct mmc_host* mmc;
|
|
struct wbsd_host* host;
|
|
|
|
/*
|
|
* Allocate MMC structure.
|
|
*/
|
|
mmc = mmc_alloc_host(sizeof(struct wbsd_host), dev);
|
|
if (!mmc)
|
|
return -ENOMEM;
|
|
|
|
host = mmc_priv(mmc);
|
|
host->mmc = mmc;
|
|
|
|
host->dma = -1;
|
|
|
|
/*
|
|
* Set host parameters.
|
|
*/
|
|
mmc->ops = &wbsd_ops;
|
|
mmc->f_min = 375000;
|
|
mmc->f_max = 24000000;
|
|
mmc->ocr_avail = MMC_VDD_32_33|MMC_VDD_33_34;
|
|
|
|
spin_lock_init(&host->lock);
|
|
|
|
/*
|
|
* Set up detection timer
|
|
*/
|
|
init_timer(&host->timer);
|
|
host->timer.data = (unsigned long)host;
|
|
host->timer.function = wbsd_detect_card;
|
|
|
|
/*
|
|
* Maximum number of segments. Worst case is one sector per segment
|
|
* so this will be 64kB/512.
|
|
*/
|
|
mmc->max_hw_segs = 128;
|
|
mmc->max_phys_segs = 128;
|
|
|
|
/*
|
|
* Maximum number of sectors in one transfer. Also limited by 64kB
|
|
* buffer.
|
|
*/
|
|
mmc->max_sectors = 128;
|
|
|
|
/*
|
|
* Maximum segment size. Could be one segment with the maximum number
|
|
* of segments.
|
|
*/
|
|
mmc->max_seg_size = mmc->max_sectors * 512;
|
|
|
|
dev_set_drvdata(dev, mmc);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void __devexit wbsd_free_mmc(struct device* dev)
|
|
{
|
|
struct mmc_host* mmc;
|
|
struct wbsd_host* host;
|
|
|
|
mmc = dev_get_drvdata(dev);
|
|
if (!mmc)
|
|
return;
|
|
|
|
host = mmc_priv(mmc);
|
|
BUG_ON(host == NULL);
|
|
|
|
del_timer_sync(&host->timer);
|
|
|
|
mmc_free_host(mmc);
|
|
|
|
dev_set_drvdata(dev, NULL);
|
|
}
|
|
|
|
/*
|
|
* Scan for known chip id:s
|
|
*/
|
|
|
|
static int __devinit wbsd_scan(struct wbsd_host* host)
|
|
{
|
|
int i, j, k;
|
|
int id;
|
|
|
|
/*
|
|
* Iterate through all ports, all codes to
|
|
* find hardware that is in our known list.
|
|
*/
|
|
for (i = 0;i < sizeof(config_ports)/sizeof(int);i++)
|
|
{
|
|
if (!request_region(config_ports[i], 2, DRIVER_NAME))
|
|
continue;
|
|
|
|
for (j = 0;j < sizeof(unlock_codes)/sizeof(int);j++)
|
|
{
|
|
id = 0xFFFF;
|
|
|
|
outb(unlock_codes[j], config_ports[i]);
|
|
outb(unlock_codes[j], config_ports[i]);
|
|
|
|
outb(WBSD_CONF_ID_HI, config_ports[i]);
|
|
id = inb(config_ports[i] + 1) << 8;
|
|
|
|
outb(WBSD_CONF_ID_LO, config_ports[i]);
|
|
id |= inb(config_ports[i] + 1);
|
|
|
|
for (k = 0;k < sizeof(valid_ids)/sizeof(int);k++)
|
|
{
|
|
if (id == valid_ids[k])
|
|
{
|
|
host->chip_id = id;
|
|
host->config = config_ports[i];
|
|
host->unlock_code = unlock_codes[i];
|
|
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
if (id != 0xFFFF)
|
|
{
|
|
DBG("Unknown hardware (id %x) found at %x\n",
|
|
id, config_ports[i]);
|
|
}
|
|
|
|
outb(LOCK_CODE, config_ports[i]);
|
|
}
|
|
|
|
release_region(config_ports[i], 2);
|
|
}
|
|
|
|
return -ENODEV;
|
|
}
|
|
|
|
/*
|
|
* Allocate/free io port ranges
|
|
*/
|
|
|
|
static int __devinit wbsd_request_region(struct wbsd_host* host, int base)
|
|
{
|
|
if (io & 0x7)
|
|
return -EINVAL;
|
|
|
|
if (!request_region(base, 8, DRIVER_NAME))
|
|
return -EIO;
|
|
|
|
host->base = io;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void __devexit wbsd_release_regions(struct wbsd_host* host)
|
|
{
|
|
if (host->base)
|
|
release_region(host->base, 8);
|
|
|
|
host->base = 0;
|
|
|
|
if (host->config)
|
|
release_region(host->config, 2);
|
|
|
|
host->config = 0;
|
|
}
|
|
|
|
/*
|
|
* Allocate/free DMA port and buffer
|
|
*/
|
|
|
|
static void __devinit wbsd_request_dma(struct wbsd_host* host, int dma)
|
|
{
|
|
if (dma < 0)
|
|
return;
|
|
|
|
if (request_dma(dma, DRIVER_NAME))
|
|
goto err;
|
|
|
|
/*
|
|
* We need to allocate a special buffer in
|
|
* order for ISA to be able to DMA to it.
|
|
*/
|
|
host->dma_buffer = kmalloc(WBSD_DMA_SIZE,
|
|
GFP_NOIO | GFP_DMA | __GFP_REPEAT | __GFP_NOWARN);
|
|
if (!host->dma_buffer)
|
|
goto free;
|
|
|
|
/*
|
|
* Translate the address to a physical address.
|
|
*/
|
|
host->dma_addr = dma_map_single(host->mmc->dev, host->dma_buffer,
|
|
WBSD_DMA_SIZE, DMA_BIDIRECTIONAL);
|
|
|
|
/*
|
|
* ISA DMA must be aligned on a 64k basis.
|
|
*/
|
|
if ((host->dma_addr & 0xffff) != 0)
|
|
goto kfree;
|
|
/*
|
|
* ISA cannot access memory above 16 MB.
|
|
*/
|
|
else if (host->dma_addr >= 0x1000000)
|
|
goto kfree;
|
|
|
|
host->dma = dma;
|
|
|
|
return;
|
|
|
|
kfree:
|
|
/*
|
|
* If we've gotten here then there is some kind of alignment bug
|
|
*/
|
|
BUG_ON(1);
|
|
|
|
dma_unmap_single(host->mmc->dev, host->dma_addr, WBSD_DMA_SIZE,
|
|
DMA_BIDIRECTIONAL);
|
|
host->dma_addr = (dma_addr_t)NULL;
|
|
|
|
kfree(host->dma_buffer);
|
|
host->dma_buffer = NULL;
|
|
|
|
free:
|
|
free_dma(dma);
|
|
|
|
err:
|
|
printk(KERN_WARNING DRIVER_NAME ": Unable to allocate DMA %d. "
|
|
"Falling back on FIFO.\n", dma);
|
|
}
|
|
|
|
static void __devexit wbsd_release_dma(struct wbsd_host* host)
|
|
{
|
|
if (host->dma_addr)
|
|
dma_unmap_single(host->mmc->dev, host->dma_addr, WBSD_DMA_SIZE,
|
|
DMA_BIDIRECTIONAL);
|
|
if (host->dma_buffer)
|
|
kfree(host->dma_buffer);
|
|
if (host->dma >= 0)
|
|
free_dma(host->dma);
|
|
|
|
host->dma = -1;
|
|
host->dma_buffer = NULL;
|
|
host->dma_addr = (dma_addr_t)NULL;
|
|
}
|
|
|
|
/*
|
|
* Allocate/free IRQ.
|
|
*/
|
|
|
|
static int __devinit wbsd_request_irq(struct wbsd_host* host, int irq)
|
|
{
|
|
int ret;
|
|
|
|
/*
|
|
* Allocate interrupt.
|
|
*/
|
|
|
|
ret = request_irq(irq, wbsd_irq, SA_SHIRQ, DRIVER_NAME, host);
|
|
if (ret)
|
|
return ret;
|
|
|
|
host->irq = irq;
|
|
|
|
/*
|
|
* Set up tasklets.
|
|
*/
|
|
tasklet_init(&host->card_tasklet, wbsd_tasklet_card, (unsigned long)host);
|
|
tasklet_init(&host->fifo_tasklet, wbsd_tasklet_fifo, (unsigned long)host);
|
|
tasklet_init(&host->crc_tasklet, wbsd_tasklet_crc, (unsigned long)host);
|
|
tasklet_init(&host->timeout_tasklet, wbsd_tasklet_timeout, (unsigned long)host);
|
|
tasklet_init(&host->finish_tasklet, wbsd_tasklet_finish, (unsigned long)host);
|
|
tasklet_init(&host->block_tasklet, wbsd_tasklet_block, (unsigned long)host);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void __devexit wbsd_release_irq(struct wbsd_host* host)
|
|
{
|
|
if (!host->irq)
|
|
return;
|
|
|
|
free_irq(host->irq, host);
|
|
|
|
host->irq = 0;
|
|
|
|
tasklet_kill(&host->card_tasklet);
|
|
tasklet_kill(&host->fifo_tasklet);
|
|
tasklet_kill(&host->crc_tasklet);
|
|
tasklet_kill(&host->timeout_tasklet);
|
|
tasklet_kill(&host->finish_tasklet);
|
|
tasklet_kill(&host->block_tasklet);
|
|
}
|
|
|
|
/*
|
|
* Allocate all resources for the host.
|
|
*/
|
|
|
|
static int __devinit wbsd_request_resources(struct wbsd_host* host,
|
|
int base, int irq, int dma)
|
|
{
|
|
int ret;
|
|
|
|
/*
|
|
* Allocate I/O ports.
|
|
*/
|
|
ret = wbsd_request_region(host, base);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/*
|
|
* Allocate interrupt.
|
|
*/
|
|
ret = wbsd_request_irq(host, irq);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/*
|
|
* Allocate DMA.
|
|
*/
|
|
wbsd_request_dma(host, dma);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Release all resources for the host.
|
|
*/
|
|
|
|
static void __devexit wbsd_release_resources(struct wbsd_host* host)
|
|
{
|
|
wbsd_release_dma(host);
|
|
wbsd_release_irq(host);
|
|
wbsd_release_regions(host);
|
|
}
|
|
|
|
/*
|
|
* Configure the resources the chip should use.
|
|
*/
|
|
|
|
static void __devinit wbsd_chip_config(struct wbsd_host* host)
|
|
{
|
|
/*
|
|
* Reset the chip.
|
|
*/
|
|
wbsd_write_config(host, WBSD_CONF_SWRST, 1);
|
|
wbsd_write_config(host, WBSD_CONF_SWRST, 0);
|
|
|
|
/*
|
|
* Select SD/MMC function.
|
|
*/
|
|
wbsd_write_config(host, WBSD_CONF_DEVICE, DEVICE_SD);
|
|
|
|
/*
|
|
* Set up card detection.
|
|
*/
|
|
wbsd_write_config(host, WBSD_CONF_PINS, WBSD_PINS_DETECT_GP11);
|
|
|
|
/*
|
|
* Configure chip
|
|
*/
|
|
wbsd_write_config(host, WBSD_CONF_PORT_HI, host->base >> 8);
|
|
wbsd_write_config(host, WBSD_CONF_PORT_LO, host->base & 0xff);
|
|
|
|
wbsd_write_config(host, WBSD_CONF_IRQ, host->irq);
|
|
|
|
if (host->dma >= 0)
|
|
wbsd_write_config(host, WBSD_CONF_DRQ, host->dma);
|
|
|
|
/*
|
|
* Enable and power up chip.
|
|
*/
|
|
wbsd_write_config(host, WBSD_CONF_ENABLE, 1);
|
|
wbsd_write_config(host, WBSD_CONF_POWER, 0x20);
|
|
}
|
|
|
|
/*
|
|
* Check that configured resources are correct.
|
|
*/
|
|
|
|
static int __devinit wbsd_chip_validate(struct wbsd_host* host)
|
|
{
|
|
int base, irq, dma;
|
|
|
|
/*
|
|
* Select SD/MMC function.
|
|
*/
|
|
wbsd_write_config(host, WBSD_CONF_DEVICE, DEVICE_SD);
|
|
|
|
/*
|
|
* Read configuration.
|
|
*/
|
|
base = wbsd_read_config(host, WBSD_CONF_PORT_HI) << 8;
|
|
base |= wbsd_read_config(host, WBSD_CONF_PORT_LO);
|
|
|
|
irq = wbsd_read_config(host, WBSD_CONF_IRQ);
|
|
|
|
dma = wbsd_read_config(host, WBSD_CONF_DRQ);
|
|
|
|
/*
|
|
* Validate against given configuration.
|
|
*/
|
|
if (base != host->base)
|
|
return 0;
|
|
if (irq != host->irq)
|
|
return 0;
|
|
if ((dma != host->dma) && (host->dma != -1))
|
|
return 0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
/*****************************************************************************\
|
|
* *
|
|
* Devices setup and shutdown *
|
|
* *
|
|
\*****************************************************************************/
|
|
|
|
static int __devinit wbsd_init(struct device* dev, int base, int irq, int dma,
|
|
int pnp)
|
|
{
|
|
struct wbsd_host* host = NULL;
|
|
struct mmc_host* mmc = NULL;
|
|
int ret;
|
|
|
|
ret = wbsd_alloc_mmc(dev);
|
|
if (ret)
|
|
return ret;
|
|
|
|
mmc = dev_get_drvdata(dev);
|
|
host = mmc_priv(mmc);
|
|
|
|
/*
|
|
* Scan for hardware.
|
|
*/
|
|
ret = wbsd_scan(host);
|
|
if (ret)
|
|
{
|
|
if (pnp && (ret == -ENODEV))
|
|
{
|
|
printk(KERN_WARNING DRIVER_NAME
|
|
": Unable to confirm device presence. You may "
|
|
"experience lock-ups.\n");
|
|
}
|
|
else
|
|
{
|
|
wbsd_free_mmc(dev);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Request resources.
|
|
*/
|
|
ret = wbsd_request_resources(host, io, irq, dma);
|
|
if (ret)
|
|
{
|
|
wbsd_release_resources(host);
|
|
wbsd_free_mmc(dev);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* See if chip needs to be configured.
|
|
*/
|
|
if (pnp && (host->config != 0))
|
|
{
|
|
if (!wbsd_chip_validate(host))
|
|
{
|
|
printk(KERN_WARNING DRIVER_NAME
|
|
": PnP active but chip not configured! "
|
|
"You probably have a buggy BIOS. "
|
|
"Configuring chip manually.\n");
|
|
wbsd_chip_config(host);
|
|
}
|
|
}
|
|
else
|
|
wbsd_chip_config(host);
|
|
|
|
/*
|
|
* Power Management stuff. No idea how this works.
|
|
* Not tested.
|
|
*/
|
|
#ifdef CONFIG_PM
|
|
if (host->config)
|
|
wbsd_write_config(host, WBSD_CONF_PME, 0xA0);
|
|
#endif
|
|
/*
|
|
* Allow device to initialise itself properly.
|
|
*/
|
|
mdelay(5);
|
|
|
|
/*
|
|
* Reset the chip into a known state.
|
|
*/
|
|
wbsd_init_device(host);
|
|
|
|
mmc_add_host(mmc);
|
|
|
|
printk(KERN_INFO "%s: W83L51xD", mmc_hostname(mmc));
|
|
if (host->chip_id != 0)
|
|
printk(" id %x", (int)host->chip_id);
|
|
printk(" at 0x%x irq %d", (int)host->base, (int)host->irq);
|
|
if (host->dma >= 0)
|
|
printk(" dma %d", (int)host->dma);
|
|
else
|
|
printk(" FIFO");
|
|
if (pnp)
|
|
printk(" PnP");
|
|
printk("\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void __devexit wbsd_shutdown(struct device* dev, int pnp)
|
|
{
|
|
struct mmc_host* mmc = dev_get_drvdata(dev);
|
|
struct wbsd_host* host;
|
|
|
|
if (!mmc)
|
|
return;
|
|
|
|
host = mmc_priv(mmc);
|
|
|
|
mmc_remove_host(mmc);
|
|
|
|
if (!pnp)
|
|
{
|
|
/*
|
|
* Power down the SD/MMC function.
|
|
*/
|
|
wbsd_unlock_config(host);
|
|
wbsd_write_config(host, WBSD_CONF_DEVICE, DEVICE_SD);
|
|
wbsd_write_config(host, WBSD_CONF_ENABLE, 0);
|
|
wbsd_lock_config(host);
|
|
}
|
|
|
|
wbsd_release_resources(host);
|
|
|
|
wbsd_free_mmc(dev);
|
|
}
|
|
|
|
/*
|
|
* Non-PnP
|
|
*/
|
|
|
|
static int __devinit wbsd_probe(struct device* dev)
|
|
{
|
|
return wbsd_init(dev, io, irq, dma, 0);
|
|
}
|
|
|
|
static int __devexit wbsd_remove(struct device* dev)
|
|
{
|
|
wbsd_shutdown(dev, 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* PnP
|
|
*/
|
|
|
|
#ifdef CONFIG_PNP
|
|
|
|
static int __devinit
|
|
wbsd_pnp_probe(struct pnp_dev * pnpdev, const struct pnp_device_id *dev_id)
|
|
{
|
|
int io, irq, dma;
|
|
|
|
/*
|
|
* Get resources from PnP layer.
|
|
*/
|
|
io = pnp_port_start(pnpdev, 0);
|
|
irq = pnp_irq(pnpdev, 0);
|
|
if (pnp_dma_valid(pnpdev, 0))
|
|
dma = pnp_dma(pnpdev, 0);
|
|
else
|
|
dma = -1;
|
|
|
|
DBGF("PnP resources: port %3x irq %d dma %d\n", io, irq, dma);
|
|
|
|
return wbsd_init(&pnpdev->dev, io, irq, dma, 1);
|
|
}
|
|
|
|
static void __devexit wbsd_pnp_remove(struct pnp_dev * dev)
|
|
{
|
|
wbsd_shutdown(&dev->dev, 1);
|
|
}
|
|
|
|
#endif /* CONFIG_PNP */
|
|
|
|
/*
|
|
* Power management
|
|
*/
|
|
|
|
#ifdef CONFIG_PM
|
|
static int wbsd_suspend(struct device *dev, pm_message_t state, u32 level)
|
|
{
|
|
DBGF("Not yet supported\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int wbsd_resume(struct device *dev, u32 level)
|
|
{
|
|
DBGF("Not yet supported\n");
|
|
|
|
return 0;
|
|
}
|
|
#else
|
|
#define wbsd_suspend NULL
|
|
#define wbsd_resume NULL
|
|
#endif
|
|
|
|
static struct platform_device *wbsd_device;
|
|
|
|
static struct device_driver wbsd_driver = {
|
|
.name = DRIVER_NAME,
|
|
.bus = &platform_bus_type,
|
|
.probe = wbsd_probe,
|
|
.remove = wbsd_remove,
|
|
|
|
.suspend = wbsd_suspend,
|
|
.resume = wbsd_resume,
|
|
};
|
|
|
|
#ifdef CONFIG_PNP
|
|
|
|
static struct pnp_driver wbsd_pnp_driver = {
|
|
.name = DRIVER_NAME,
|
|
.id_table = pnp_dev_table,
|
|
.probe = wbsd_pnp_probe,
|
|
.remove = wbsd_pnp_remove,
|
|
};
|
|
|
|
#endif /* CONFIG_PNP */
|
|
|
|
/*
|
|
* Module loading/unloading
|
|
*/
|
|
|
|
static int __init wbsd_drv_init(void)
|
|
{
|
|
int result;
|
|
|
|
printk(KERN_INFO DRIVER_NAME
|
|
": Winbond W83L51xD SD/MMC card interface driver, "
|
|
DRIVER_VERSION "\n");
|
|
printk(KERN_INFO DRIVER_NAME ": Copyright(c) Pierre Ossman\n");
|
|
|
|
#ifdef CONFIG_PNP
|
|
|
|
if (!nopnp)
|
|
{
|
|
result = pnp_register_driver(&wbsd_pnp_driver);
|
|
if (result < 0)
|
|
return result;
|
|
}
|
|
|
|
#endif /* CONFIG_PNP */
|
|
|
|
if (nopnp)
|
|
{
|
|
result = driver_register(&wbsd_driver);
|
|
if (result < 0)
|
|
return result;
|
|
|
|
wbsd_device = platform_device_register_simple(DRIVER_NAME, -1,
|
|
NULL, 0);
|
|
if (IS_ERR(wbsd_device))
|
|
return PTR_ERR(wbsd_device);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void __exit wbsd_drv_exit(void)
|
|
{
|
|
#ifdef CONFIG_PNP
|
|
|
|
if (!nopnp)
|
|
pnp_unregister_driver(&wbsd_pnp_driver);
|
|
|
|
#endif /* CONFIG_PNP */
|
|
|
|
if (nopnp)
|
|
{
|
|
platform_device_unregister(wbsd_device);
|
|
|
|
driver_unregister(&wbsd_driver);
|
|
}
|
|
|
|
DBG("unloaded\n");
|
|
}
|
|
|
|
module_init(wbsd_drv_init);
|
|
module_exit(wbsd_drv_exit);
|
|
#ifdef CONFIG_PNP
|
|
module_param(nopnp, uint, 0444);
|
|
#endif
|
|
module_param(io, uint, 0444);
|
|
module_param(irq, uint, 0444);
|
|
module_param(dma, int, 0444);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_DESCRIPTION("Winbond W83L51xD SD/MMC card interface driver");
|
|
MODULE_VERSION(DRIVER_VERSION);
|
|
|
|
#ifdef CONFIG_PNP
|
|
MODULE_PARM_DESC(nopnp, "Scan for device instead of relying on PNP. (default 0)");
|
|
#endif
|
|
MODULE_PARM_DESC(io, "I/O base to allocate. Must be 8 byte aligned. (default 0x248)");
|
|
MODULE_PARM_DESC(irq, "IRQ to allocate. (default 6)");
|
|
MODULE_PARM_DESC(dma, "DMA channel to allocate. -1 for no DMA. (default 2)");
|