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-rw-r--r--recipes/linux/linux-2.6.18/atmel-mmc-host-driver.patch986
1 files changed, 986 insertions, 0 deletions
diff --git a/recipes/linux/linux-2.6.18/atmel-mmc-host-driver.patch b/recipes/linux/linux-2.6.18/atmel-mmc-host-driver.patch
new file mode 100644
index 0000000000..b7d7e8ae3f
--- /dev/null
+++ b/recipes/linux/linux-2.6.18/atmel-mmc-host-driver.patch
@@ -0,0 +1,986 @@
+From nobody Mon Sep 17 00:00:00 2001
+From: Håvard Skinnemoen <hskinnemoen@atmel.com>
+Date: Fri Nov 18 17:20:29 2005 +0100
+Subject: [PATCH] AVR32: MMC Host Driver
+
+---
+
+ drivers/mmc/Kconfig | 10
+ drivers/mmc/Makefile | 1
+ drivers/mmc/atmel-mci.c | 738 ++++++++++++++++++++++++++++++++++++++++++++++++
+ drivers/mmc/atmel-mci.h | 192 ++++++++++++
+ 4 files changed, 941 insertions(+)
+
+Index: linux-2.6.18-avr32/drivers/mmc/Kconfig
+===================================================================
+--- linux-2.6.18-avr32.orig/drivers/mmc/Kconfig 2007-01-15 10:14:40.000000000 +0100
++++ linux-2.6.18-avr32/drivers/mmc/Kconfig 2007-01-15 10:14:46.000000000 +0100
+@@ -71,6 +71,16 @@ config MMC_OMAP
+
+ If unsure, say N.
+
++config MMC_ATMELMCI
++ tristate "Atmel Multimedia Card Interface support"
++ depends on AVR32 && MMC
++ help
++ This selects the Atmel Multimedia Card Interface. If you have
++ a AT91 (ARM) or AT32 (AVR32) platform with a Multimedia Card
++ slot, say Y or M here.
++
++ If unsure, say N.
++
+ config MMC_WBSD
+ tristate "Winbond W83L51xD SD/MMC Card Interface support"
+ depends on MMC && ISA_DMA_API
+Index: linux-2.6.18-avr32/drivers/mmc/Makefile
+===================================================================
+--- linux-2.6.18-avr32.orig/drivers/mmc/Makefile 2007-01-15 10:14:40.000000000 +0100
++++ linux-2.6.18-avr32/drivers/mmc/Makefile 2007-01-15 10:14:46.000000000 +0100
+@@ -23,6 +23,7 @@ obj-$(CONFIG_MMC_WBSD) += wbsd.o
+ obj-$(CONFIG_MMC_AU1X) += au1xmmc.o
+ obj-$(CONFIG_MMC_OMAP) += omap.o
+ obj-$(CONFIG_MMC_AT91RM9200) += at91_mci.o
++obj-$(CONFIG_MMC_ATMELMCI) += atmel-mci.o
+
+ mmc_core-y := mmc.o mmc_queue.o mmc_sysfs.o
+
+Index: linux-2.6.18-avr32/drivers/mmc/atmel-mci.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ linux-2.6.18-avr32/drivers/mmc/atmel-mci.c 2007-01-15 10:31:55.000000000 +0100
+@@ -0,0 +1,738 @@
++/*
++ * Atmel MultiMedia Card Interface driver
++ *
++ * Copyright (C) 2004-2006 Atmel 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 as
++ * published by the Free Software Foundation.
++ */
++#include <linux/blkdev.h>
++#include <linux/clk.h>
++#include <linux/device.h>
++#include <linux/dma-mapping.h>
++#include <linux/init.h>
++#include <linux/interrupt.h>
++#include <linux/ioport.h>
++#include <linux/module.h>
++#include <linux/platform_device.h>
++
++#include <linux/mmc/host.h>
++#include <linux/mmc/protocol.h>
++
++#include <asm/dma-controller.h>
++#include <asm/io.h>
++
++#include "atmel-mci.h"
++
++#define DRIVER_NAME "mmci"
++
++#define MCI_CMD_ERROR_FLAGS (MCI_BIT(RINDE) | MCI_BIT(RDIRE) | \
++ MCI_BIT(RCRCE) | MCI_BIT(RENDE) | \
++ MCI_BIT(RTOE))
++#define MCI_DATA_ERROR_FLAGS (MCI_BIT(DCRCE) | MCI_BIT(DTOE) | \
++ MCI_BIT(OVRE) | MCI_BIT(UNRE))
++
++enum {
++ EVENT_CMD_COMPLETE = 0,
++ EVENT_CMD_ERROR,
++ EVENT_DATA_COMPLETE,
++ EVENT_DATA_ERROR,
++ EVENT_STOP_SENT,
++ EVENT_STOP_COMPLETE,
++ EVENT_STOP_ERROR,
++ EVENT_DMA_ERROR,
++};
++
++struct atmel_mci_dma {
++ struct dma_request_sg req;
++ unsigned short rx_periph_id;
++ unsigned short tx_periph_id;
++ int blocks_left;
++};
++
++struct atmel_mci {
++ struct mmc_host *mmc;
++ void __iomem *regs;
++ struct atmel_mci_dma dma;
++
++ struct mmc_request *mrq;
++ struct mmc_command *cmd;
++ struct mmc_data *data;
++
++ u32 stop_cmdr;
++ u32 stop_iflags;
++
++ struct tasklet_struct tasklet;
++ unsigned long pending_events;
++ unsigned long completed_events;
++ u32 error_status;
++
++ unsigned long bus_hz;
++ unsigned long mapbase;
++ struct clk *mck;
++ struct platform_device *pdev;
++};
++
++/* Those printks take an awful lot of time... */
++#ifndef DEBUG
++static unsigned int fmax = 15000000U;
++#else
++static unsigned int fmax = 1000000U;
++#endif
++module_param(fmax, uint, 0444);
++MODULE_PARM_DESC(fmax, "Max frequency in Hz of the MMC bus clock");
++
++static inline unsigned int ns_to_clocks(struct atmel_mci *host,
++ unsigned int ns)
++{
++ return (ns * (host->bus_hz / 1000000) + 999) / 1000;
++}
++
++static void atmci_set_timeout(struct atmel_mci *host,
++ struct mmc_data *data)
++{
++ static unsigned dtomul_to_shift[] = {
++ 0, 4, 7, 8, 10, 12, 16, 20
++ };
++ unsigned timeout;
++ unsigned dtocyc, dtomul;
++
++ timeout = ns_to_clocks(host, data->timeout_ns) + data->timeout_clks;
++
++ for (dtomul = 0; dtomul < 8; dtomul++) {
++ unsigned shift = dtomul_to_shift[dtomul];
++ dtocyc = (timeout + (1 << shift) - 1) >> shift;
++ if (dtocyc < 15)
++ break;
++ }
++
++ if (dtomul >= 8) {
++ dtomul = 7;
++ dtocyc = 15;
++ }
++
++ pr_debug("%s: setting timeout to %u cycles\n",
++ mmc_hostname(host->mmc),
++ dtocyc << dtomul_to_shift[dtomul]);
++ mci_writel(host, DTOR, (MCI_BF(DTOMUL, dtomul)
++ | MCI_BF(DTOCYC, dtocyc)));
++}
++
++/*
++ * Return mask with interrupt flags to be handled for this command.
++ */
++static u32 atmci_prepare_command(struct mmc_host *mmc,
++ struct mmc_command *cmd,
++ u32 *cmd_flags)
++{
++ u32 cmdr;
++ u32 iflags;
++
++ cmd->error = MMC_ERR_NONE;
++
++ cmdr = 0;
++ BUG_ON(MCI_BFEXT(CMDNB, cmdr) != 0);
++ cmdr = MCI_BFINS(CMDNB, cmd->opcode, cmdr);
++
++ if (cmd->flags & MMC_RSP_PRESENT) {
++ if (cmd->flags & MMC_RSP_136)
++ cmdr |= MCI_BF(RSPTYP, MCI_RSPTYP_136_BIT);
++ else
++ cmdr |= MCI_BF(RSPTYP, MCI_RSPTYP_48_BIT);
++ }
++
++ /*
++ * This should really be MAXLAT_5 for CMD2 and ACMD41, but
++ * it's too difficult to determine whether this is an ACMD or
++ * not. Better make it 64.
++ */
++ cmdr |= MCI_BIT(MAXLAT);
++
++ if (mmc->ios.bus_mode == MMC_BUSMODE_OPENDRAIN)
++ cmdr |= MCI_BIT(OPDCMD);
++
++ iflags = MCI_BIT(CMDRDY) | MCI_CMD_ERROR_FLAGS;
++ if (!(cmd->flags & MMC_RSP_CRC))
++ iflags &= ~MCI_BIT(RCRCE);
++
++ pr_debug("%s: cmd: op %02x arg %08x flags %08x, cmdflags %08lx\n",
++ mmc_hostname(mmc), cmd->opcode, cmd->arg, cmd->flags,
++ (unsigned long)cmdr);
++
++ *cmd_flags = cmdr;
++ return iflags;
++}
++
++static void atmci_start_command(struct atmel_mci *host,
++ struct mmc_command *cmd,
++ u32 cmd_flags)
++{
++ WARN_ON(host->cmd);
++ host->cmd = cmd;
++
++ mci_writel(host, ARGR, cmd->arg);
++ mci_writel(host, CMDR, cmd_flags);
++
++ if (cmd->data)
++ dma_start_request(host->dma.req.req.dmac,
++ host->dma.req.req.channel);
++}
++
++/*
++ * Returns a mask of flags to be set in the command register when the
++ * command to start the transfer is to be sent.
++ */
++static u32 atmci_prepare_data(struct mmc_host *mmc, struct mmc_data *data)
++{
++ struct atmel_mci *host = mmc_priv(mmc);
++ u32 cmd_flags;
++
++ WARN_ON(host->data);
++ host->data = data;
++
++ atmci_set_timeout(host, data);
++ mci_writel(host, BLKR, (MCI_BF(BCNT, data->blocks)
++ | MCI_BF(BLKLEN, data->blksz)));
++ host->dma.req.block_size = data->blksz;
++
++ cmd_flags = MCI_BF(TRCMD, MCI_TRCMD_START_TRANS);
++ if (data->flags & MMC_DATA_STREAM)
++ cmd_flags |= MCI_BF(TRTYP, MCI_TRTYP_STREAM);
++ else if (data->blocks > 1)
++ cmd_flags |= MCI_BF(TRTYP, MCI_TRTYP_MULTI_BLOCK);
++ else
++ cmd_flags |= MCI_BF(TRTYP, MCI_TRTYP_BLOCK);
++
++ if (data->flags & MMC_DATA_READ) {
++ cmd_flags |= MCI_BIT(TRDIR);
++ host->dma.req.nr_sg
++ = dma_map_sg(&host->pdev->dev, data->sg,
++ data->sg_len, DMA_FROM_DEVICE);
++ host->dma.req.periph_id = host->dma.rx_periph_id;
++ host->dma.req.direction = DMA_DIR_PERIPH_TO_MEM;
++ host->dma.req.data_reg = host->mapbase + MCI_RDR;
++ } else {
++ host->dma.req.nr_sg
++ = dma_map_sg(&host->pdev->dev, data->sg,
++ data->sg_len, DMA_TO_DEVICE);
++ host->dma.req.periph_id = host->dma.tx_periph_id;
++ host->dma.req.direction = DMA_DIR_MEM_TO_PERIPH;
++ host->dma.req.data_reg = host->mapbase + MCI_TDR;
++ }
++ host->dma.req.sg = data->sg;
++ host->dma.blocks_left = data->blocks;
++
++ dma_prepare_request_sg(host->dma.req.req.dmac, &host->dma.req);
++
++ return cmd_flags;
++}
++
++static void atmci_request(struct mmc_host *mmc, struct mmc_request *mrq)
++{
++ struct atmel_mci *host = mmc_priv(mmc);
++ struct mmc_data *data = mrq->data;
++ u32 iflags;
++ u32 cmdflags = 0;
++
++ iflags = mci_readl(host, IMR);
++ if (iflags)
++ printk("WARNING: IMR=0x%08x\n", mci_readl(host, IMR));
++
++ WARN_ON(host->mrq != NULL);
++ host->mrq = mrq;
++ host->pending_events = 0;
++ host->completed_events = 0;
++
++ iflags = atmci_prepare_command(mmc, mrq->cmd, &cmdflags);
++
++ if (mrq->stop) {
++ BUG_ON(!data);
++
++ host->stop_iflags = atmci_prepare_command(mmc, mrq->stop,
++ &host->stop_cmdr);
++ host->stop_cmdr |= MCI_BF(TRCMD, MCI_TRCMD_STOP_TRANS);
++ if (!(data->flags & MMC_DATA_WRITE))
++ host->stop_cmdr |= MCI_BIT(TRDIR);
++ if (data->flags & MMC_DATA_STREAM)
++ host->stop_cmdr |= MCI_BF(TRTYP, MCI_TRTYP_STREAM);
++ else
++ host->stop_cmdr |= MCI_BF(TRTYP, MCI_TRTYP_MULTI_BLOCK);
++ }
++ if (data) {
++ cmdflags |= atmci_prepare_data(mmc, data);
++ iflags |= MCI_DATA_ERROR_FLAGS;
++ }
++
++ atmci_start_command(host, mrq->cmd, cmdflags);
++ mci_writel(host, IER, iflags);
++}
++
++static void atmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
++{
++ struct atmel_mci *host = mmc_priv(mmc);
++
++ if (ios->clock) {
++ u32 clkdiv;
++
++ clkdiv = host->bus_hz / (2 * ios->clock) - 1;
++ if (clkdiv > 255)
++ clkdiv = 255;
++ mci_writel(host, MR, (clkdiv
++ | MCI_BIT(WRPROOF)
++ | MCI_BIT(RDPROOF)));
++ }
++
++ switch (ios->bus_width) {
++ case MMC_BUS_WIDTH_1:
++ mci_writel(host, SDCR, 0);
++ break;
++ case MMC_BUS_WIDTH_4:
++ mci_writel(host, SDCR, MCI_BIT(SDCBUS));
++ break;
++ }
++
++ switch (ios->power_mode) {
++ case MMC_POWER_OFF:
++ mci_writel(host, CR, MCI_BIT(MCIDIS));
++ break;
++ case MMC_POWER_UP:
++ mci_writel(host, CR, MCI_BIT(SWRST));
++ break;
++ case MMC_POWER_ON:
++ mci_writel(host, CR, MCI_BIT(MCIEN));
++ break;
++ }
++}
++
++static struct mmc_host_ops atmci_ops = {
++ .request = atmci_request,
++ .set_ios = atmci_set_ios,
++};
++
++static void atmci_request_end(struct mmc_host *mmc, struct mmc_request *mrq)
++{
++ struct atmel_mci *host = mmc_priv(mmc);
++
++ WARN_ON(host->cmd || host->data);
++ host->mrq = NULL;
++
++ mmc_request_done(mmc, mrq);
++}
++
++static void send_stop_cmd(struct mmc_host *mmc, struct mmc_data *data,
++ u32 flags)
++{
++ struct atmel_mci *host = mmc_priv(mmc);
++
++ atmci_start_command(host, data->stop, host->stop_cmdr | flags);
++ mci_writel(host, IER, host->stop_iflags);
++}
++
++static void atmci_data_complete(struct atmel_mci *host, struct mmc_data *data)
++{
++ host->data = NULL;
++ dma_unmap_sg(&host->pdev->dev, data->sg, host->dma.req.nr_sg,
++ ((data->flags & MMC_DATA_WRITE)
++ ? DMA_TO_DEVICE : DMA_FROM_DEVICE));
++
++ /*
++ * Data might complete before command for very short transfers
++ * (like READ_SCR)
++ */
++ if (test_bit(EVENT_CMD_COMPLETE, &host->completed_events)
++ && (!data->stop
++ || test_bit(EVENT_STOP_COMPLETE, &host->completed_events)))
++ atmci_request_end(host->mmc, data->mrq);
++}
++
++static void atmci_command_error(struct mmc_host *mmc,
++ struct mmc_command *cmd,
++ u32 status)
++{
++ pr_debug("%s: command error: status=0x%08x\n",
++ mmc_hostname(mmc), status);
++
++ if (status & MCI_BIT(RTOE))
++ cmd->error = MMC_ERR_TIMEOUT;
++ else if (status & MCI_BIT(RCRCE))
++ cmd->error = MMC_ERR_BADCRC;
++ else
++ cmd->error = MMC_ERR_FAILED;
++}
++
++static void atmci_tasklet_func(unsigned long priv)
++{
++ struct mmc_host *mmc = (struct mmc_host *)priv;
++ struct atmel_mci *host = mmc_priv(mmc);
++ struct mmc_request *mrq = host->mrq;
++ struct mmc_data *data = host->data;
++
++ pr_debug("atmci_tasklet: pending/completed/mask %lx/%lx/%x\n",
++ host->pending_events, host->completed_events,
++ mci_readl(host, IMR));
++
++ if (test_and_clear_bit(EVENT_CMD_ERROR, &host->pending_events)) {
++ struct mmc_command *cmd;
++
++ set_bit(EVENT_CMD_ERROR, &host->completed_events);
++ clear_bit(EVENT_CMD_COMPLETE, &host->pending_events);
++ cmd = host->mrq->cmd;
++
++ if (cmd->data) {
++ dma_stop_request(host->dma.req.req.dmac,
++ host->dma.req.req.channel);
++ host->data = NULL;
++ }
++
++ atmci_command_error(mmc, cmd, host->error_status);
++ atmci_request_end(mmc, cmd->mrq);
++ }
++ if (test_and_clear_bit(EVENT_STOP_ERROR, &host->pending_events)) {
++ set_bit(EVENT_STOP_ERROR, &host->completed_events);
++ clear_bit(EVENT_STOP_COMPLETE, &host->pending_events);
++ atmci_command_error(mmc, host->mrq->stop,
++ host->error_status);
++ if (!host->data)
++ atmci_request_end(mmc, host->mrq);
++ }
++ if (test_and_clear_bit(EVENT_CMD_COMPLETE, &host->pending_events)) {
++ set_bit(EVENT_CMD_COMPLETE, &host->completed_events);
++ if (!mrq->data
++ || test_bit(EVENT_DATA_COMPLETE, &host->completed_events))
++ atmci_request_end(mmc, mrq);
++ }
++ if (test_and_clear_bit(EVENT_STOP_COMPLETE, &host->pending_events)) {
++ set_bit(EVENT_STOP_COMPLETE, &host->completed_events);
++ if (test_bit(EVENT_DATA_COMPLETE, &host->completed_events))
++ atmci_request_end(mmc, mrq);
++ }
++ if (test_and_clear_bit(EVENT_DMA_ERROR, &host->pending_events)) {
++ set_bit(EVENT_DMA_ERROR, &host->completed_events);
++ clear_bit(EVENT_DATA_COMPLETE, &host->pending_events);
++
++ /* DMA controller got bus error => invalid address */
++ data->error = MMC_ERR_INVALID;
++
++ printk(KERN_DEBUG "%s: dma error after %u bytes xfered\n",
++ mmc_hostname(mmc), host->data->bytes_xfered);
++
++ if (data->stop
++ && !test_and_set_bit(EVENT_STOP_SENT,
++ &host->completed_events))
++ /* TODO: Check if card is still present */
++ send_stop_cmd(host->mmc, data, 0);
++
++ atmci_data_complete(host, data);
++ }
++ if (test_and_clear_bit(EVENT_DATA_ERROR, &host->pending_events)) {
++ u32 status = host->error_status;
++
++ set_bit(EVENT_DATA_ERROR, &host->completed_events);
++ clear_bit(EVENT_DATA_COMPLETE, &host->pending_events);
++
++ dma_stop_request(host->dma.req.req.dmac,
++ host->dma.req.req.channel);
++
++ printk(KERN_DEBUG "%s: data error: status=0x%08x\n",
++ mmc_hostname(host->mmc), status);
++
++ if (status & MCI_BIT(DCRCE)) {
++ printk(KERN_DEBUG "%s: Data CRC error\n",
++ mmc_hostname(host->mmc));
++ data->error = MMC_ERR_BADCRC;
++ } else if (status & MCI_BIT(DTOE)) {
++ printk(KERN_DEBUG "%s: Data Timeout error\n",
++ mmc_hostname(host->mmc));
++ data->error = MMC_ERR_TIMEOUT;
++ } else {
++ printk(KERN_DEBUG "%s: Data FIFO error\n",
++ mmc_hostname(host->mmc));
++ data->error = MMC_ERR_FIFO;
++ }
++ printk(KERN_DEBUG "%s: Bytes xfered: %u\n",
++ mmc_hostname(host->mmc), data->bytes_xfered);
++
++ if (data->stop
++ && !test_and_set_bit(EVENT_STOP_SENT, &host->completed_events))
++ /* TODO: Check if card is still present */
++ send_stop_cmd(host->mmc, data, 0);
++
++ atmci_data_complete(host, data);
++ }
++ if (test_and_clear_bit(EVENT_DATA_COMPLETE, &host->pending_events)) {
++ set_bit(EVENT_DATA_COMPLETE, &host->completed_events);
++ data->bytes_xfered = data->blocks * data->blksz;
++ atmci_data_complete(host, data);
++ }
++}
++
++static void atmci_cmd_interrupt(struct mmc_host *mmc, u32 status)
++{
++ struct atmel_mci *host = mmc_priv(mmc);
++ struct mmc_command *cmd = host->cmd;
++
++ /*
++ * Read the response now so that we're free to send a new
++ * command immediately.
++ */
++ cmd->resp[0] = mci_readl(host, RSPR);
++ cmd->resp[1] = mci_readl(host, RSPR);
++ cmd->resp[2] = mci_readl(host, RSPR);
++ cmd->resp[3] = mci_readl(host, RSPR);
++
++ mci_writel(host, IDR, MCI_BIT(CMDRDY) | MCI_CMD_ERROR_FLAGS);
++ host->cmd = NULL;
++
++ if (test_bit(EVENT_STOP_SENT, &host->completed_events))
++ set_bit(EVENT_STOP_COMPLETE, &host->pending_events);
++ else
++ set_bit(EVENT_CMD_COMPLETE, &host->pending_events);
++
++ tasklet_schedule(&host->tasklet);
++}
++
++static void atmci_xfer_complete(struct dma_request *_req)
++{
++ struct dma_request_sg *req = to_dma_request_sg(_req);
++ struct atmel_mci_dma *dma;
++ struct atmel_mci *host;
++ struct mmc_data *data;
++
++ dma = container_of(req, struct atmel_mci_dma, req);
++ host = container_of(dma, struct atmel_mci, dma);
++ data = host->data;
++
++ if (data->stop && !test_and_set_bit(EVENT_STOP_SENT,
++ &host->completed_events))
++ send_stop_cmd(host->mmc, data, 0);
++
++ if (data->flags & MMC_DATA_READ) {
++ mci_writel(host, IDR, MCI_DATA_ERROR_FLAGS);
++ set_bit(EVENT_DATA_COMPLETE, &host->pending_events);
++ tasklet_schedule(&host->tasklet);
++ } else {
++ /*
++ * For the WRITE case, wait for NOTBUSY. This function
++ * is called when everything has been written to the
++ * controller, not when the card is done programming.
++ */
++ mci_writel(host, IER, MCI_BIT(NOTBUSY));
++ }
++}
++
++static void atmci_dma_error(struct dma_request *_req)
++{
++ struct dma_request_sg *req = to_dma_request_sg(_req);
++ struct atmel_mci_dma *dma;
++ struct atmel_mci *host;
++
++ dma = container_of(req, struct atmel_mci_dma, req);
++ host = container_of(dma, struct atmel_mci, dma);
++
++ mci_writel(host, IDR, (MCI_BIT(NOTBUSY)
++ | MCI_DATA_ERROR_FLAGS));
++
++ set_bit(EVENT_DMA_ERROR, &host->pending_events);
++ tasklet_schedule(&host->tasklet);
++}
++
++static irqreturn_t atmci_interrupt(int irq, void *dev_id,
++ struct pt_regs *regs)
++{
++ struct mmc_host *mmc = dev_id;
++ struct atmel_mci *host = mmc_priv(mmc);
++ u32 status, mask, pending;
++
++ spin_lock(&mmc->lock);
++
++ status = mci_readl(host, SR);
++ mask = mci_readl(host, IMR);
++ pending = status & mask;
++
++ do {
++ if (pending & MCI_CMD_ERROR_FLAGS) {
++ mci_writel(host, IDR, (MCI_BIT(CMDRDY)
++ | MCI_BIT(NOTBUSY)
++ | MCI_CMD_ERROR_FLAGS
++ | MCI_DATA_ERROR_FLAGS));
++ host->error_status = status;
++ host->cmd = NULL;
++ if (test_bit(EVENT_STOP_SENT, &host->completed_events))
++ set_bit(EVENT_STOP_ERROR, &host->pending_events);
++ else
++ set_bit(EVENT_CMD_ERROR, &host->pending_events);
++ tasklet_schedule(&host->tasklet);
++ break;
++ }
++ if (pending & MCI_DATA_ERROR_FLAGS) {
++ mci_writel(host, IDR, (MCI_BIT(NOTBUSY)
++ | MCI_DATA_ERROR_FLAGS));
++ host->error_status = status;
++ set_bit(EVENT_DATA_ERROR, &host->pending_events);
++ tasklet_schedule(&host->tasklet);
++ break;
++ }
++ if (pending & MCI_BIT(CMDRDY))
++ atmci_cmd_interrupt(mmc, status);
++ if (pending & MCI_BIT(NOTBUSY)) {
++ mci_writel(host, IDR, (MCI_BIT(NOTBUSY)
++ | MCI_DATA_ERROR_FLAGS));
++ set_bit(EVENT_DATA_COMPLETE, &host->pending_events);
++ tasklet_schedule(&host->tasklet);
++ }
++
++ status = mci_readl(host, SR);
++ mask = mci_readl(host, IMR);
++ pending = status & mask;
++ } while (pending);
++
++ spin_unlock(&mmc->lock);
++
++ return IRQ_HANDLED;
++}
++
++static int __devinit atmci_probe(struct platform_device *pdev)
++{
++ struct atmel_mci *host;
++ struct mmc_host *mmc;
++ struct resource *regs;
++ int irq;
++ int ret;
++
++ regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
++ if (!regs)
++ return -ENXIO;
++ irq = platform_get_irq(pdev, 0);
++ if (irq < 0)
++ return irq;
++
++ mmc = mmc_alloc_host(sizeof(struct atmel_mci), &pdev->dev);
++ if (!mmc)
++ return -ENOMEM;
++
++ host = mmc_priv(mmc);
++ host->pdev = pdev;
++ host->mmc = mmc;
++
++ host->mck = clk_get(&pdev->dev, "mck");
++ if (IS_ERR(host->mck)) {
++ ret = PTR_ERR(host->mck);
++ goto out_free_host;
++ }
++ clk_enable(host->mck);
++
++ ret = -ENOMEM;
++ host->regs = ioremap(regs->start, regs->end - regs->start + 1);
++ if (!host->regs)
++ goto out_disable_clk;
++
++ host->bus_hz = clk_get_rate(host->mck);
++ host->mapbase = regs->start;
++
++ mmc->ops = &atmci_ops;
++ mmc->f_min = (host->bus_hz + 511) / 512;
++ mmc->f_max = min((unsigned int)(host->bus_hz / 2), fmax);
++ mmc->ocr_avail = 0x00100000;
++ mmc->caps |= MMC_CAP_4_BIT_DATA;
++
++ tasklet_init(&host->tasklet, atmci_tasklet_func, (unsigned long)mmc);
++
++ ret = request_irq(irq, atmci_interrupt, 0, "mmci", mmc);
++ if (ret)
++ goto out_unmap;
++
++ /* TODO: Get this information from platform data */
++ ret = -ENOMEM;
++ host->dma.req.req.dmac = find_dma_controller(0);
++ if (!host->dma.req.req.dmac) {
++ printk(KERN_ERR
++ "mmci: No DMA controller available, aborting\n");
++ goto out_free_irq;
++ }
++ ret = dma_alloc_channel(host->dma.req.req.dmac);
++ if (ret < 0) {
++ printk(KERN_ERR
++ "mmci: Unable to allocate DMA channel, aborting\n");
++ goto out_free_irq;
++ }
++ host->dma.req.req.channel = ret;
++ host->dma.req.width = DMA_WIDTH_32BIT;
++ host->dma.req.req.xfer_complete = atmci_xfer_complete;
++ host->dma.req.req.block_complete = NULL; // atmci_block_complete;
++ host->dma.req.req.error = atmci_dma_error;
++ host->dma.rx_periph_id = 0;
++ host->dma.tx_periph_id = 1;
++
++ mci_writel(host, CR, MCI_BIT(SWRST));
++ mci_writel(host, IDR, ~0UL);
++ mci_writel(host, CR, MCI_BIT(MCIEN));
++
++ platform_set_drvdata(pdev, host);
++
++ mmc_add_host(mmc);
++
++ printk(KERN_INFO "%s: Atmel MCI controller at 0x%08lx irq %d\n",
++ mmc_hostname(mmc), host->mapbase, irq);
++
++ return 0;
++
++out_free_irq:
++ free_irq(irq, mmc);
++out_unmap:
++ iounmap(host->regs);
++out_disable_clk:
++ clk_disable(host->mck);
++ clk_put(host->mck);
++out_free_host:
++ mmc_free_host(mmc);
++ return ret;
++}
++
++static int __devexit atmci_remove(struct platform_device *pdev)
++{
++ struct atmel_mci *host = platform_get_drvdata(pdev);
++
++ platform_set_drvdata(pdev, NULL);
++
++ if (host) {
++ mmc_remove_host(host->mmc);
++
++ mci_writel(host, IDR, ~0UL);
++ mci_writel(host, CR, MCI_BIT(MCIDIS));
++ mci_readl(host, SR);
++
++ free_irq(platform_get_irq(pdev, 0), host->mmc);
++ iounmap(host->regs);
++
++ clk_disable(host->mck);
++ clk_put(host->mck);
++
++ mmc_free_host(host->mmc);
++ }
++ return 0;
++}
++
++static struct platform_driver atmci_driver = {
++ .probe = atmci_probe,
++ .remove = __devexit_p(atmci_remove),
++ .driver = {
++ .name = DRIVER_NAME,
++ },
++};
++
++static int __init atmci_init(void)
++{
++ return platform_driver_register(&atmci_driver);
++}
++
++static void __exit atmci_exit(void)
++{
++ platform_driver_unregister(&atmci_driver);
++}
++
++module_init(atmci_init);
++module_exit(atmci_exit);
++
++MODULE_DESCRIPTION("Atmel Multimedia Card Interface driver");
++MODULE_LICENSE("GPL");
+Index: linux-2.6.18-avr32/drivers/mmc/atmel-mci.h
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ linux-2.6.18-avr32/drivers/mmc/atmel-mci.h 2007-01-15 10:31:36.000000000 +0100
+@@ -0,0 +1,192 @@
++/*
++ * Atmel MultiMedia Card Interface driver
++ *
++ * Copyright (C) 2004-2006 Atmel 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 as
++ * published by the Free Software Foundation.
++ */
++#ifndef __DRIVERS_MMC_ATMEL_MCI_H__
++#define __DRIVERS_MMC_ATMEL_MCI_H__
++
++/* MCI register offsets */
++#define MCI_CR 0x0000
++#define MCI_MR 0x0004
++#define MCI_DTOR 0x0008
++#define MCI_SDCR 0x000c
++#define MCI_ARGR 0x0010
++#define MCI_CMDR 0x0014
++#define MCI_BLKR 0x0018
++#define MCI_RSPR 0x0020
++#define MCI_RSPR1 0x0024
++#define MCI_RSPR2 0x0028
++#define MCI_RSPR3 0x002c
++#define MCI_RDR 0x0030
++#define MCI_TDR 0x0034
++#define MCI_SR 0x0040
++#define MCI_IER 0x0044
++#define MCI_IDR 0x0048
++#define MCI_IMR 0x004c
++
++/* Bitfields in CR */
++#define MCI_MCIEN_OFFSET 0
++#define MCI_MCIEN_SIZE 1
++#define MCI_MCIDIS_OFFSET 1
++#define MCI_MCIDIS_SIZE 1
++#define MCI_PWSEN_OFFSET 2
++#define MCI_PWSEN_SIZE 1
++#define MCI_PWSDIS_OFFSET 3
++#define MCI_PWSDIS_SIZE 1
++#define MCI_SWRST_OFFSET 7
++#define MCI_SWRST_SIZE 1
++
++/* Bitfields in MR */
++#define MCI_CLKDIV_OFFSET 0
++#define MCI_CLKDIV_SIZE 8
++#define MCI_PWSDIV_OFFSET 8
++#define MCI_PWSDIV_SIZE 3
++#define MCI_RDPROOF_OFFSET 11
++#define MCI_RDPROOF_SIZE 1
++#define MCI_WRPROOF_OFFSET 12
++#define MCI_WRPROOF_SIZE 1
++#define MCI_DMAPADV_OFFSET 14
++#define MCI_DMAPADV_SIZE 1
++#define MCI_BLKLEN_OFFSET 16
++#define MCI_BLKLEN_SIZE 16
++
++/* Bitfields in DTOR */
++#define MCI_DTOCYC_OFFSET 0
++#define MCI_DTOCYC_SIZE 4
++#define MCI_DTOMUL_OFFSET 4
++#define MCI_DTOMUL_SIZE 3
++
++/* Bitfields in SDCR */
++#define MCI_SDCSEL_OFFSET 0
++#define MCI_SDCSEL_SIZE 4
++#define MCI_SDCBUS_OFFSET 7
++#define MCI_SDCBUS_SIZE 1
++
++/* Bitfields in ARGR */
++#define MCI_ARG_OFFSET 0
++#define MCI_ARG_SIZE 32
++
++/* Bitfields in CMDR */
++#define MCI_CMDNB_OFFSET 0
++#define MCI_CMDNB_SIZE 6
++#define MCI_RSPTYP_OFFSET 6
++#define MCI_RSPTYP_SIZE 2
++#define MCI_SPCMD_OFFSET 8
++#define MCI_SPCMD_SIZE 3
++#define MCI_OPDCMD_OFFSET 11
++#define MCI_OPDCMD_SIZE 1
++#define MCI_MAXLAT_OFFSET 12
++#define MCI_MAXLAT_SIZE 1
++#define MCI_TRCMD_OFFSET 16
++#define MCI_TRCMD_SIZE 2
++#define MCI_TRDIR_OFFSET 18
++#define MCI_TRDIR_SIZE 1
++#define MCI_TRTYP_OFFSET 19
++#define MCI_TRTYP_SIZE 2
++
++/* Bitfields in BLKR */
++#define MCI_BCNT_OFFSET 0
++#define MCI_BCNT_SIZE 16
++
++/* Bitfields in RSPRn */
++#define MCI_RSP_OFFSET 0
++#define MCI_RSP_SIZE 32
++
++/* Bitfields in SR/IER/IDR/IMR */
++#define MCI_CMDRDY_OFFSET 0
++#define MCI_CMDRDY_SIZE 1
++#define MCI_RXRDY_OFFSET 1
++#define MCI_RXRDY_SIZE 1
++#define MCI_TXRDY_OFFSET 2
++#define MCI_TXRDY_SIZE 1
++#define MCI_BLKE_OFFSET 3
++#define MCI_BLKE_SIZE 1
++#define MCI_DTIP_OFFSET 4
++#define MCI_DTIP_SIZE 1
++#define MCI_NOTBUSY_OFFSET 5
++#define MCI_NOTBUSY_SIZE 1
++#define MCI_ENDRX_OFFSET 6
++#define MCI_ENDRX_SIZE 1
++#define MCI_ENDTX_OFFSET 7
++#define MCI_ENDTX_SIZE 1
++#define MCI_RXBUFF_OFFSET 14
++#define MCI_RXBUFF_SIZE 1
++#define MCI_TXBUFE_OFFSET 15
++#define MCI_TXBUFE_SIZE 1
++#define MCI_RINDE_OFFSET 16
++#define MCI_RINDE_SIZE 1
++#define MCI_RDIRE_OFFSET 17
++#define MCI_RDIRE_SIZE 1
++#define MCI_RCRCE_OFFSET 18
++#define MCI_RCRCE_SIZE 1
++#define MCI_RENDE_OFFSET 19
++#define MCI_RENDE_SIZE 1
++#define MCI_RTOE_OFFSET 20
++#define MCI_RTOE_SIZE 1
++#define MCI_DCRCE_OFFSET 21
++#define MCI_DCRCE_SIZE 1
++#define MCI_DTOE_OFFSET 22
++#define MCI_DTOE_SIZE 1
++#define MCI_OVRE_OFFSET 30
++#define MCI_OVRE_SIZE 1
++#define MCI_UNRE_OFFSET 31
++#define MCI_UNRE_SIZE 1
++
++/* Constants for DTOMUL */
++#define MCI_DTOMUL_1_CYCLE 0
++#define MCI_DTOMUL_16_CYCLES 1
++#define MCI_DTOMUL_128_CYCLES 2
++#define MCI_DTOMUL_256_CYCLES 3
++#define MCI_DTOMUL_1024_CYCLES 4
++#define MCI_DTOMUL_4096_CYCLES 5
++#define MCI_DTOMUL_65536_CYCLES 6
++#define MCI_DTOMUL_1048576_CYCLES 7
++
++/* Constants for RSPTYP */
++#define MCI_RSPTYP_NO_RESP 0
++#define MCI_RSPTYP_48_BIT 1
++#define MCI_RSPTYP_136_BIT 2
++
++/* Constants for SPCMD */
++#define MCI_SPCMD_NO_SPEC_CMD 0
++#define MCI_SPCMD_INIT_CMD 1
++#define MCI_SPCMD_SYNC_CMD 2
++#define MCI_SPCMD_INT_CMD 4
++#define MCI_SPCMD_INT_RESP 5
++
++/* Constants for TRCMD */
++#define MCI_TRCMD_NO_TRANS 0
++#define MCI_TRCMD_START_TRANS 1
++#define MCI_TRCMD_STOP_TRANS 2
++
++/* Constants for TRTYP */
++#define MCI_TRTYP_BLOCK 0
++#define MCI_TRTYP_MULTI_BLOCK 1
++#define MCI_TRTYP_STREAM 2
++
++/* Bit manipulation macros */
++#define MCI_BIT(name) \
++ (1 << MCI_##name##_OFFSET)
++#define MCI_BF(name,value) \
++ (((value) & ((1 << MCI_##name##_SIZE) - 1)) \
++ << MCI_##name##_OFFSET)
++#define MCI_BFEXT(name,value) \
++ (((value) >> MCI_##name##_OFFSET) \
++ & ((1 << MCI_##name##_SIZE) - 1))
++#define MCI_BFINS(name,value,old) \
++ (((old) & ~(((1 << MCI_##name##_SIZE) - 1) \
++ << MCI_##name##_OFFSET)) \
++ | MCI_BF(name,value))
++
++/* Register access macros */
++#define mci_readl(port,reg) \
++ __raw_readl((port)->regs + MCI_##reg)
++#define mci_writel(port,reg,value) \
++ __raw_writel((value), (port)->regs + MCI_##reg)
++
++#endif /* __DRIVERS_MMC_ATMEL_MCI_H__ */
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-21 19:51:37 +0000