--- /dev/null
+/*
+ * linux/drivers/mmc/host/wbsd.c - Winbond W83L51xD SD/MMC driver
+ *
+ * Copyright (C) 2004-2007 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 as published by
+ * the Free Software Foundation; either version 2 of the License, or (at
+ * your option) any later version.
+ *
+ *
+ * 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/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/ioport.h>
+#include <linux/platform_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/scatterlist.h>
+#include <linux/slab.h>
+
+#include <asm/io.h>
+#include <asm/dma.h>
+
+#include "wbsd.h"
+
+#define DRIVER_NAME "wbsd"
+
+#define DBG(x...) \
+ pr_debug(DRIVER_NAME ": " x)
+#define DBGF(f, x...) \
+ pr_debug(DRIVER_NAME " [%s()]: " f, __func__ , ##x)
+
+/*
+ * 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 param_nopnp = 0;
+#else
+static const unsigned int param_nopnp = 1;
+#endif
+static unsigned int param_io = 0x248;
+static unsigned int param_irq = 6;
+static int param_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_CRC;
+ ier |= WBSD_EINT_TIMEOUT;
+ 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;
+
+ pr_err("%s: Resetting chip\n", mmc_hostname(host->mmc));
+
+ /*
+ * 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;
+
+ 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_sg_to_buffer(struct wbsd_host *host)
+{
+ return sg_virt(host->cur_sg);
+}
+
+static inline void wbsd_sg_to_dma(struct wbsd_host *host, struct mmc_data *data)
+{
+ unsigned int len, i;
+ struct scatterlist *sg;
+ char *dmabuf = host->dma_buffer;
+ char *sgbuf;
+
+ sg = data->sg;
+ len = data->sg_len;
+
+ for (i = 0; i < len; i++) {
+ sgbuf = sg_virt(&sg[i]);
+ memcpy(dmabuf, sgbuf, sg[i].length);
+ dmabuf += sg[i].length;
+ }
+}
+
+static inline void wbsd_dma_to_sg(struct wbsd_host *host, struct mmc_data *data)
+{
+ unsigned int len, i;
+ struct scatterlist *sg;
+ char *dmabuf = host->dma_buffer;
+ char *sgbuf;
+
+ sg = data->sg;
+ len = data->sg_len;
+
+ for (i = 0; i < len; i++) {
+ sgbuf = sg_virt(&sg[i]);
+ memcpy(sgbuf, dmabuf, sg[i].length);
+ dmabuf += sg[i].length;
+ }
+}
+
+/*
+ * 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 = -EILSEQ;
+ 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 = -EILSEQ;
+ 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;
+
+ /*
+ * 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 = 0;
+
+ /*
+ * 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_PRESENT) {
+ /*
+ * Read back status.
+ */
+ isr = host->isr;
+
+ /* Card removed? */
+ if (isr & WBSD_INT_CARD)
+ cmd->error = -ENOMEDIUM;
+ /* Timeout? */
+ else if (isr & WBSD_INT_TIMEOUT)
+ cmd->error = -ETIMEDOUT;
+ /* CRC? */
+ else if ((cmd->flags & MMC_RSP_CRC) && (isr & WBSD_INT_CRC))
+ cmd->error = -EILSEQ;
+ /* All ok */
+ else {
+ if (cmd->flags & MMC_RSP_136)
+ wbsd_get_long_reply(host, cmd);
+ else
+ wbsd_get_short_reply(host, cmd);
+ }
+ }
+}
+
+/*
+ * 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 (host->num_sg == 0)
+ return;
+
+ buffer = wbsd_sg_to_buffer(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++;
+
+ /*
+ * End of scatter list entry?
+ */
+ if (host->remain == 0) {
+ /*
+ * Get next entry. Check if last.
+ */
+ if (!wbsd_next_sg(host))
+ return;
+
+ buffer = wbsd_sg_to_buffer(host);
+ }
+ }
+ }
+
+ /*
+ * This is a very dirty hack to solve a
+ * hardware problem. The chip doesn't trigger
+ * FIFO threshold interrupts properly.
+ */
+ if ((data->blocks * data->blksz - 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 transferred.
+ */
+ if (host->num_sg == 0)
+ return;
+
+ buffer = wbsd_sg_to_buffer(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++;
+
+ /*
+ * End of scatter list entry?
+ */
+ if (host->remain == 0) {
+ /*
+ * Get next entry. Check if last.
+ */
+ if (!wbsd_next_sg(host))
+ return;
+
+ buffer = wbsd_sg_to_buffer(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;
+ unsigned int size;
+
+ /*
+ * Calculate size.
+ */
+ size = data->blocks * data->blksz;
+
+ /*
+ * 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.
+ * Two bytes are needed for each data line.
+ */
+ if (host->bus_width == MMC_BUS_WIDTH_1) {
+ blksize = data->blksz + 2;
+
+ wbsd_write_index(host, WBSD_IDX_PBSMSB, (blksize >> 4) & 0xF0);
+ wbsd_write_index(host, WBSD_IDX_PBSLSB, blksize & 0xFF);
+ } else if (host->bus_width == MMC_BUS_WIDTH_4) {
+ blksize = data->blksz + 2 * 4;
+
+ wbsd_write_index(host, WBSD_IDX_PBSMSB,
+ ((blksize >> 4) & 0xF0) | WBSD_DATA_WIDTH);
+ wbsd_write_index(host, WBSD_IDX_PBSLSB, blksize & 0xFF);
+ } else {
+ data->error = -EINVAL;
+ return;
+ }
+
+ /*
+ * 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(size > 0x10000);
+ if (size > 0x10000) {
+ data->error = -EINVAL;
+ 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, 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 = 0;
+}
+
+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);
+
+ data->bytes_xfered = host->mrq->data->blocks *
+ host->mrq->data->blksz - count;
+ data->bytes_xfered -= data->bytes_xfered % data->blksz;
+
+ /*
+ * Any leftover data?
+ */
+ if (count) {
+ pr_err("%s: Incomplete DMA transfer. "
+ "%d bytes left.\n",
+ mmc_hostname(host->mmc), count);
+
+ if (!data->error)
+ data->error = -EIO;
+ } else {
+ /*
+ * Transfer data from DMA buffer to
+ * SG list.
+ */
+ if (data->flags & MMC_DATA_READ)
+ wbsd_dma_to_sg(host, data);
+ }
+
+ if (data->error) {
+ if (data->bytes_xfered)
+ data->bytes_xfered -= data->blksz;
+ }
+ }
+
+ 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;
+
+ /*
+ * Check that there is actually a card in the slot.
+ */
+ if (!(host->flags & WBSD_FCARD_PRESENT)) {
+ cmd->error = -ENOMEDIUM;
+ goto done;
+ }
+
+ if (cmd->data) {
+ /*
+ * The hardware is so delightfully stupid that it has a list
+ * of "data" commands. If a command isn't on this list, it'll
+ * just go back to the idle state and won't send any data
+ * interrupts.
+ */
+ switch (cmd->opcode) {
+ case 11:
+ case 17:
+ case 18:
+ case 20:
+ case 24:
+ case 25:
+ case 26:
+ case 27:
+ case 30:
+ case 42:
+ case 56:
+ break;
+
+ /* ACMDs. We don't keep track of state, so we just treat them
+ * like any other command. */
+ case 51:
+ break;
+
+ default:
+#ifdef CONFIG_MMC_DEBUG
+ pr_warn("%s: Data command %d is not supported by this controller\n",
+ mmc_hostname(host->mmc), cmd->opcode);
+#endif
+ cmd->error = -EINVAL;
+
+ goto done;
+ };
+ }
+
+ /*
+ * Does the request include data?
+ */
+ if (cmd->data) {
+ wbsd_prepare_data(host, cmd->data);
+
+ if (cmd->data->error)
+ goto done;
+ }
+
+ wbsd_send_command(host, cmd);
+
+ /*
+ * If this is a data transfer the request
+ * will be finished after the data has
+ * transferred.
+ */
+ if (cmd->data && !cmd->error) {
+ /*
+ * 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;
+
+ 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.
+ * It wreaks havoc with the card detection though so
+ * that needs to be disabled.
+ */
+ setup = wbsd_read_index(host, WBSD_IDX_SETUP);
+ if (ios->chip_select == MMC_CS_HIGH) {
+ BUG_ON(ios->bus_width != MMC_BUS_WIDTH_1);
+ setup |= WBSD_DAT3_H;
+ host->flags |= WBSD_FIGNORE_DETECT;
+ } else {
+ if (setup & WBSD_DAT3_H) {
+ setup &= ~WBSD_DAT3_H;
+
+ /*
+ * We cannot resume card detection immediately
+ * because of capacitance and delays in the chip.
+ */
+ mod_timer(&host->ignore_timer, jiffies + HZ / 100);
+ }
+ }
+ wbsd_write_index(host, WBSD_IDX_SETUP, setup);
+
+ /*
+ * Store bus width for later. Will be used when
+ * setting up the data transfer.
+ */
+ host->bus_width = ios->bus_width;
+
+ spin_unlock_bh(&host->lock);
+}
+
+static int wbsd_get_ro(struct mmc_host *mmc)
+{
+ struct wbsd_host *host = mmc_priv(mmc);
+ u8 csr;
+
+ spin_lock_bh(&host->lock);
+
+ csr = inb(host->base + WBSD_CSR);
+ csr |= WBSD_MSLED;
+ outb(csr, host->base + WBSD_CSR);
+
+ mdelay(1);
+
+ csr = inb(host->base + WBSD_CSR);
+ csr &= ~WBSD_MSLED;
+ outb(csr, host->base + WBSD_CSR);
+
+ spin_unlock_bh(&host->lock);
+
+ return !!(csr & WBSD_WRPT);
+}
+
+static const struct mmc_host_ops wbsd_ops = {
+ .request = wbsd_request,
+ .set_ios = wbsd_set_ios,
+ .get_ro = wbsd_get_ro,
+};
+
+/*****************************************************************************\
+ * *
+ * Interrupt handling *
+ * *
+\*****************************************************************************/
+
+/*
+ * Helper function to reset detection ignore
+ */
+
+static void wbsd_reset_ignore(unsigned long data)
+{
+ struct wbsd_host *host = (struct wbsd_host *)data;
+
+ BUG_ON(host == NULL);
+
+ DBG("Resetting card detection ignore\n");
+
+ spin_lock_bh(&host->lock);
+
+ host->flags &= ~WBSD_FIGNORE_DETECT;
+
+ /*
+ * Card status might have changed during the
+ * blackout.
+ */
+ tasklet_schedule(&host->card_tasklet);
+
+ spin_unlock_bh(&host->lock);
+}
+
+/*
+ * 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;
+ int delay = -1;
+
+ 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 = 500;
+ }
+ } else if (host->flags & WBSD_FCARD_PRESENT) {
+ DBG("Card removed\n");
+ host->flags &= ~WBSD_FCARD_PRESENT;
+
+ if (host->mrq) {
+ pr_err("%s: Card removed during transfer!\n",
+ mmc_hostname(host->mmc));
+ wbsd_reset(host);
+
+ host->mrq->cmd->error = -ENOMEDIUM;
+ tasklet_schedule(&host->finish_tasklet);
+ }
+
+ delay = 0;
+ }
+
+ /*
+ * Unlock first since we might get a call back.
+ */
+
+ spin_unlock(&host->lock);
+
+ if (delay != -1)
+ mmc_detect_change(host->mmc, msecs_to_jiffies(delay));
+}
+
+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->num_sg == 0) {
+ 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 = -EILSEQ;
+
+ 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 = -ETIMEDOUT;
+
+ 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);
+}
+
+/*
+ * Interrupt handling
+ */
+
+static irqreturn_t wbsd_irq(int irq, void *dev_id)
+{
+ 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_TC)
+ tasklet_schedule(&host->finish_tasklet);
+
+ return IRQ_HANDLED;
+}
+
+/*****************************************************************************\
+ * *
+ * Device initialisation and shutdown *
+ * *
+\*****************************************************************************/
+
+/*
+ * Allocate/free MMC structure.
+ */
+
+static int 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;
+ mmc->caps = MMC_CAP_4_BIT_DATA;
+
+ spin_lock_init(&host->lock);
+
+ /*
+ * Set up timers
+ */
+ init_timer(&host->ignore_timer);
+ host->ignore_timer.data = (unsigned long)host;
+ host->ignore_timer.function = wbsd_reset_ignore;
+
+ /*
+ * Maximum number of segments. Worst case is one sector per segment
+ * so this will be 64kB/512.
+ */
+ mmc->max_segs = 128;
+
+ /*
+ * Maximum request size. Also limited by 64KiB buffer.
+ */
+ mmc->max_req_size = 65536;
+
+ /*
+ * Maximum segment size. Could be one segment with the maximum number
+ * of bytes.
+ */
+ mmc->max_seg_size = mmc->max_req_size;
+
+ /*
+ * Maximum block size. We have 12 bits (= 4095) but have to subtract
+ * space for CRC. So the maximum is 4095 - 4*2 = 4087.
+ */
+ mmc->max_blk_size = 4087;
+
+ /*
+ * Maximum block count. There is no real limit so the maximum
+ * request size will be the only restriction.
+ */
+ mmc->max_blk_count = mmc->max_req_size;
+
+ dev_set_drvdata(dev, mmc);
+
+ return 0;
+}
+
+static void 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->ignore_timer);
+
+ mmc_free_host(mmc);
+
+ dev_set_drvdata(dev, NULL);
+}
+
+/*
+ * Scan for known chip id:s
+ */
+
+static int 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 < ARRAY_SIZE(config_ports); i++) {
+ if (!request_region(config_ports[i], 2, DRIVER_NAME))
+ continue;
+
+ for (j = 0; j < ARRAY_SIZE(unlock_codes); j++) {
+ id = 0xFFFF;
+
+ host->config = config_ports[i];
+ host->unlock_code = unlock_codes[j];
+
+ wbsd_unlock_config(host);
+
+ 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);
+
+ wbsd_lock_config(host);
+
+ for (k = 0; k < ARRAY_SIZE(valid_ids); k++) {
+ if (id == valid_ids[k]) {
+ host->chip_id = id;
+
+ return 0;
+ }
+ }
+
+ if (id != 0xFFFF) {
+ DBG("Unknown hardware (id %x) found at %x\n",
+ id, config_ports[i]);
+ }
+ }
+
+ release_region(config_ports[i], 2);
+ }
+
+ host->config = 0;
+ host->unlock_code = 0;
+
+ return -ENODEV;
+}
+
+/*
+ * Allocate/free io port ranges
+ */
+
+static int wbsd_request_region(struct wbsd_host *host, int base)
+{
+ if (base & 0x7)
+ return -EINVAL;
+
+ if (!request_region(base, 8, DRIVER_NAME))
+ return -EIO;
+
+ host->base = base;
+
+ return 0;
+}
+
+static void 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 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(mmc_dev(host->mmc), 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(mmc_dev(host->mmc), host->dma_addr,
+ WBSD_DMA_SIZE, DMA_BIDIRECTIONAL);
+ host->dma_addr = 0;
+
+ kfree(host->dma_buffer);
+ host->dma_buffer = NULL;
+
+free:
+ free_dma(dma);
+
+err:
+ pr_warn(DRIVER_NAME ": Unable to allocate DMA %d - falling back on FIFO\n",
+ dma);
+}
+
+static void wbsd_release_dma(struct wbsd_host *host)
+{
+ if (host->dma_addr) {
+ dma_unmap_single(mmc_dev(host->mmc), host->dma_addr,
+ WBSD_DMA_SIZE, DMA_BIDIRECTIONAL);
+ }
+ kfree(host->dma_buffer);
+ if (host->dma >= 0)
+ free_dma(host->dma);
+
+ host->dma = -1;
+ host->dma_buffer = NULL;
+ host->dma_addr = 0;
+}
+
+/*
+ * Allocate/free IRQ.
+ */
+
+static int wbsd_request_irq(struct wbsd_host *host, int irq)
+{
+ int ret;
+
+ /*
+ * Set up tasklets. Must be done before requesting interrupt.
+ */
+ 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);
+
+ /*
+ * Allocate interrupt.
+ */
+ ret = request_irq(irq, wbsd_irq, IRQF_SHARED, DRIVER_NAME, host);
+ if (ret)
+ return ret;
+
+ host->irq = irq;
+
+ return 0;
+}
+
+static void 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);
+}
+
+/*
+ * Allocate all resources for the host.
+ */
+
+static int 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 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 wbsd_chip_config(struct wbsd_host *host)
+{
+ wbsd_unlock_config(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);
+
+ wbsd_lock_config(host);
+}
+
+/*
+ * Check that configured resources are correct.
+ */
+
+static int wbsd_chip_validate(struct wbsd_host *host)
+{
+ int base, irq, dma;
+
+ wbsd_unlock_config(host);
+
+ /*
+ * 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);
+
+ wbsd_lock_config(host);
+
+ /*
+ * 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;
+}
+
+/*
+ * Powers down the SD function
+ */
+
+static void wbsd_chip_poweroff(struct wbsd_host *host)
+{
+ 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);
+}
+
+/*****************************************************************************\
+ * *
+ * Devices setup and shutdown *
+ * *
+\*****************************************************************************/
+
+static int 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)) {
+ pr_warn(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, base, irq, dma);
+ if (ret) {
+ wbsd_release_resources(host);
+ wbsd_free_mmc(dev);
+ return ret;
+ }
+
+ /*
+ * See if chip needs to be configured.
+ */
+ if (pnp) {
+ if ((host->config != 0) && !wbsd_chip_validate(host)) {
+ pr_warn(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_unlock_config(host);
+ wbsd_write_config(host, WBSD_CONF_PME, 0xA0);
+ wbsd_lock_config(host);
+ }
+#endif
+ /*
+ * Allow device to initialise itself properly.
+ */
+ mdelay(5);
+
+ /*
+ * Reset the chip into a known state.
+ */
+ wbsd_init_device(host);
+
+ mmc_add_host(mmc);
+
+ pr_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 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);
+
+ /*
+ * Power down the SD/MMC function.
+ */
+ if (!pnp)
+ wbsd_chip_poweroff(host);
+
+ wbsd_release_resources(host);
+
+ wbsd_free_mmc(dev);
+}
+
+/*
+ * Non-PnP
+ */
+
+static int wbsd_probe(struct platform_device *dev)
+{
+ /* Use the module parameters for resources */
+ return wbsd_init(&dev->dev, param_io, param_irq, param_dma, 0);
+}
+
+static int wbsd_remove(struct platform_device *dev)
+{
+ wbsd_shutdown(&dev->dev, 0);
+
+ return 0;
+}
+
+/*
+ * PnP
+ */
+
+#ifdef CONFIG_PNP
+
+static int
+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 wbsd_pnp_remove(struct pnp_dev *dev)
+{
+ wbsd_shutdown(&dev->dev, 1);
+}
+
+#endif /* CONFIG_PNP */
+
+/*
+ * Power management
+ */
+
+#ifdef CONFIG_PM
+
+static int wbsd_platform_suspend(struct platform_device *dev,
+ pm_message_t state)
+{
+ struct mmc_host *mmc = platform_get_drvdata(dev);
+ struct wbsd_host *host;
+
+ if (mmc == NULL)
+ return 0;
+
+ DBGF("Suspending...\n");
+
+ host = mmc_priv(mmc);
+
+ wbsd_chip_poweroff(host);
+ return 0;
+}
+
+static int wbsd_platform_resume(struct platform_device *dev)
+{
+ struct mmc_host *mmc = platform_get_drvdata(dev);
+ struct wbsd_host *host;
+
+ if (mmc == NULL)
+ return 0;
+
+ DBGF("Resuming...\n");
+
+ host = mmc_priv(mmc);
+
+ wbsd_chip_config(host);
+
+ /*
+ * Allow device to initialise itself properly.
+ */
+ mdelay(5);
+
+ wbsd_init_device(host);
+ return 0;
+}
+
+#ifdef CONFIG_PNP
+
+static int wbsd_pnp_suspend(struct pnp_dev *pnp_dev, pm_message_t state)
+{
+ struct mmc_host *mmc = dev_get_drvdata(&pnp_dev->dev);
+
+ if (mmc == NULL)
+ return 0;
+
+ DBGF("Suspending...\n");
+ return 0;
+}
+
+static int wbsd_pnp_resume(struct pnp_dev *pnp_dev)
+{
+ struct mmc_host *mmc = dev_get_drvdata(&pnp_dev->dev);
+ struct wbsd_host *host;
+
+ if (mmc == NULL)
+ return 0;
+
+ DBGF("Resuming...\n");
+
+ host = mmc_priv(mmc);
+
+ /*
+ * See if chip needs to be configured.
+ */
+ if (host->config != 0) {
+ if (!wbsd_chip_validate(host)) {
+ pr_warn(DRIVER_NAME ": PnP active but chip not configured! You probably have a buggy BIOS. Configuring chip manually.\n");
+ wbsd_chip_config(host);
+ }
+ }
+
+ /*
+ * Allow device to initialise itself properly.
+ */
+ mdelay(5);
+
+ wbsd_init_device(host);
+ return 0;
+}
+
+#endif /* CONFIG_PNP */
+
+#else /* CONFIG_PM */
+
+#define wbsd_platform_suspend NULL
+#define wbsd_platform_resume NULL
+
+#define wbsd_pnp_suspend NULL
+#define wbsd_pnp_resume NULL
+
+#endif /* CONFIG_PM */
+
+static struct platform_device *wbsd_device;
+
+static struct platform_driver wbsd_driver = {
+ .probe = wbsd_probe,
+ .remove = wbsd_remove,
+
+ .suspend = wbsd_platform_suspend,
+ .resume = wbsd_platform_resume,
+ .driver = {
+ .name = DRIVER_NAME,
+ },
+};
+
+#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,
+
+ .suspend = wbsd_pnp_suspend,
+ .resume = wbsd_pnp_resume,
+};
+
+#endif /* CONFIG_PNP */
+
+/*
+ * Module loading/unloading
+ */
+
+static int __init wbsd_drv_init(void)
+{
+ int result;
+
+ pr_info(DRIVER_NAME
+ ": Winbond W83L51xD SD/MMC card interface driver\n");
+ pr_info(DRIVER_NAME ": Copyright(c) Pierre Ossman\n");
+
+#ifdef CONFIG_PNP
+
+ if (!param_nopnp) {
+ result = pnp_register_driver(&wbsd_pnp_driver);
+ if (result < 0)
+ return result;
+ }
+#endif /* CONFIG_PNP */
+
+ if (param_nopnp) {
+ result = platform_driver_register(&wbsd_driver);
+ if (result < 0)
+ return result;
+
+ wbsd_device = platform_device_alloc(DRIVER_NAME, -1);
+ if (!wbsd_device) {
+ platform_driver_unregister(&wbsd_driver);
+ return -ENOMEM;
+ }
+
+ result = platform_device_add(wbsd_device);
+ if (result) {
+ platform_device_put(wbsd_device);
+ platform_driver_unregister(&wbsd_driver);
+ return result;
+ }
+ }
+
+ return 0;
+}
+
+static void __exit wbsd_drv_exit(void)
+{
+#ifdef CONFIG_PNP
+
+ if (!param_nopnp)
+ pnp_unregister_driver(&wbsd_pnp_driver);
+
+#endif /* CONFIG_PNP */
+
+ if (param_nopnp) {
+ platform_device_unregister(wbsd_device);
+
+ platform_driver_unregister(&wbsd_driver);
+ }
+
+ DBG("unloaded\n");
+}
+
+module_init(wbsd_drv_init);
+module_exit(wbsd_drv_exit);
+#ifdef CONFIG_PNP
+module_param_named(nopnp, param_nopnp, uint, 0444);
+#endif
+module_param_named(io, param_io, uint, 0444);
+module_param_named(irq, param_irq, uint, 0444);
+module_param_named(dma, param_dma, int, 0444);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Pierre Ossman <pierre@ossman.eu>");
+MODULE_DESCRIPTION("Winbond W83L51xD SD/MMC card interface driver");
+
+#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)");
Code Review / kvmfornfv.git / blobdiff