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authorPierre Ossman <drzeus@drzeus.cx>2007-02-11 19:57:36 +0100
committerPierre Ossman <drzeus@drzeus.cx>2007-05-01 13:04:17 +0200
commit1c6a0718f0bfdab0d9b7da5f7b74f38a0058c03a (patch)
tree5e7f2a26d5d1782d87c596b40f874c6c0b8b8e1a /drivers/mmc/mmci.c
parent98ac2162699f7e9880683cb954891817f20b607c (diff)
downloadop-kernel-dev-1c6a0718f0bfdab0d9b7da5f7b74f38a0058c03a.zip
op-kernel-dev-1c6a0718f0bfdab0d9b7da5f7b74f38a0058c03a.tar.gz
mmc: Move host and card drivers to subdirs
Clean up the drivers/mmc directory by moving card and host drivers into subdirectories. Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Diffstat (limited to 'drivers/mmc/mmci.c')
-rw-r--r--drivers/mmc/mmci.c702
1 files changed, 0 insertions, 702 deletions
diff --git a/drivers/mmc/mmci.c b/drivers/mmc/mmci.c
deleted file mode 100644
index d11c2d2..0000000
--- a/drivers/mmc/mmci.c
+++ /dev/null
@@ -1,702 +0,0 @@
-/*
- * linux/drivers/mmc/mmci.c - ARM PrimeCell MMCI PL180/1 driver
- *
- * Copyright (C) 2003 Deep Blue Solutions, Ltd, 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.
- */
-#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/delay.h>
-#include <linux/err.h>
-#include <linux/highmem.h>
-#include <linux/mmc/host.h>
-#include <linux/amba/bus.h>
-#include <linux/clk.h>
-
-#include <asm/cacheflush.h>
-#include <asm/div64.h>
-#include <asm/io.h>
-#include <asm/scatterlist.h>
-#include <asm/sizes.h>
-#include <asm/mach/mmc.h>
-
-#include "mmci.h"
-
-#define DRIVER_NAME "mmci-pl18x"
-
-#define DBG(host,fmt,args...) \
- pr_debug("%s: %s: " fmt, mmc_hostname(host->mmc), __func__ , args)
-
-static unsigned int fmax = 515633;
-
-static void
-mmci_request_end(struct mmci_host *host, struct mmc_request *mrq)
-{
- writel(0, host->base + MMCICOMMAND);
-
- BUG_ON(host->data);
-
- host->mrq = NULL;
- host->cmd = NULL;
-
- if (mrq->data)
- mrq->data->bytes_xfered = host->data_xfered;
-
- /*
- * Need to drop the host lock here; mmc_request_done may call
- * back into the driver...
- */
- spin_unlock(&host->lock);
- mmc_request_done(host->mmc, mrq);
- spin_lock(&host->lock);
-}
-
-static void mmci_stop_data(struct mmci_host *host)
-{
- writel(0, host->base + MMCIDATACTRL);
- writel(0, host->base + MMCIMASK1);
- host->data = NULL;
-}
-
-static void mmci_start_data(struct mmci_host *host, struct mmc_data *data)
-{
- unsigned int datactrl, timeout, irqmask;
- unsigned long long clks;
- void __iomem *base;
- int blksz_bits;
-
- DBG(host, "blksz %04x blks %04x flags %08x\n",
- data->blksz, data->blocks, data->flags);
-
- host->data = data;
- host->size = data->blksz;
- host->data_xfered = 0;
-
- mmci_init_sg(host, data);
-
- clks = (unsigned long long)data->timeout_ns * host->cclk;
- do_div(clks, 1000000000UL);
-
- timeout = data->timeout_clks + (unsigned int)clks;
-
- base = host->base;
- writel(timeout, base + MMCIDATATIMER);
- writel(host->size, base + MMCIDATALENGTH);
-
- blksz_bits = ffs(data->blksz) - 1;
- BUG_ON(1 << blksz_bits != data->blksz);
-
- datactrl = MCI_DPSM_ENABLE | blksz_bits << 4;
- if (data->flags & MMC_DATA_READ) {
- datactrl |= MCI_DPSM_DIRECTION;
- irqmask = MCI_RXFIFOHALFFULLMASK;
-
- /*
- * If we have less than a FIFOSIZE of bytes to transfer,
- * trigger a PIO interrupt as soon as any data is available.
- */
- if (host->size < MCI_FIFOSIZE)
- irqmask |= MCI_RXDATAAVLBLMASK;
- } else {
- /*
- * We don't actually need to include "FIFO empty" here
- * since its implicit in "FIFO half empty".
- */
- irqmask = MCI_TXFIFOHALFEMPTYMASK;
- }
-
- writel(datactrl, base + MMCIDATACTRL);
- writel(readl(base + MMCIMASK0) & ~MCI_DATAENDMASK, base + MMCIMASK0);
- writel(irqmask, base + MMCIMASK1);
-}
-
-static void
-mmci_start_command(struct mmci_host *host, struct mmc_command *cmd, u32 c)
-{
- void __iomem *base = host->base;
-
- DBG(host, "op %02x arg %08x flags %08x\n",
- cmd->opcode, cmd->arg, cmd->flags);
-
- if (readl(base + MMCICOMMAND) & MCI_CPSM_ENABLE) {
- writel(0, base + MMCICOMMAND);
- udelay(1);
- }
-
- c |= cmd->opcode | MCI_CPSM_ENABLE;
- if (cmd->flags & MMC_RSP_PRESENT) {
- if (cmd->flags & MMC_RSP_136)
- c |= MCI_CPSM_LONGRSP;
- c |= MCI_CPSM_RESPONSE;
- }
- if (/*interrupt*/0)
- c |= MCI_CPSM_INTERRUPT;
-
- host->cmd = cmd;
-
- writel(cmd->arg, base + MMCIARGUMENT);
- writel(c, base + MMCICOMMAND);
-}
-
-static void
-mmci_data_irq(struct mmci_host *host, struct mmc_data *data,
- unsigned int status)
-{
- if (status & MCI_DATABLOCKEND) {
- host->data_xfered += data->blksz;
- }
- if (status & (MCI_DATACRCFAIL|MCI_DATATIMEOUT|MCI_TXUNDERRUN|MCI_RXOVERRUN)) {
- if (status & MCI_DATACRCFAIL)
- data->error = MMC_ERR_BADCRC;
- else if (status & MCI_DATATIMEOUT)
- data->error = MMC_ERR_TIMEOUT;
- else if (status & (MCI_TXUNDERRUN|MCI_RXOVERRUN))
- data->error = MMC_ERR_FIFO;
- status |= MCI_DATAEND;
-
- /*
- * We hit an error condition. Ensure that any data
- * partially written to a page is properly coherent.
- */
- if (host->sg_len && data->flags & MMC_DATA_READ)
- flush_dcache_page(host->sg_ptr->page);
- }
- if (status & MCI_DATAEND) {
- mmci_stop_data(host);
-
- if (!data->stop) {
- mmci_request_end(host, data->mrq);
- } else {
- mmci_start_command(host, data->stop, 0);
- }
- }
-}
-
-static void
-mmci_cmd_irq(struct mmci_host *host, struct mmc_command *cmd,
- unsigned int status)
-{
- void __iomem *base = host->base;
-
- host->cmd = NULL;
-
- cmd->resp[0] = readl(base + MMCIRESPONSE0);
- cmd->resp[1] = readl(base + MMCIRESPONSE1);
- cmd->resp[2] = readl(base + MMCIRESPONSE2);
- cmd->resp[3] = readl(base + MMCIRESPONSE3);
-
- if (status & MCI_CMDTIMEOUT) {
- cmd->error = MMC_ERR_TIMEOUT;
- } else if (status & MCI_CMDCRCFAIL && cmd->flags & MMC_RSP_CRC) {
- cmd->error = MMC_ERR_BADCRC;
- }
-
- if (!cmd->data || cmd->error != MMC_ERR_NONE) {
- if (host->data)
- mmci_stop_data(host);
- mmci_request_end(host, cmd->mrq);
- } else if (!(cmd->data->flags & MMC_DATA_READ)) {
- mmci_start_data(host, cmd->data);
- }
-}
-
-static int mmci_pio_read(struct mmci_host *host, char *buffer, unsigned int remain)
-{
- void __iomem *base = host->base;
- char *ptr = buffer;
- u32 status;
-
- do {
- int count = host->size - (readl(base + MMCIFIFOCNT) << 2);
-
- if (count > remain)
- count = remain;
-
- if (count <= 0)
- break;
-
- readsl(base + MMCIFIFO, ptr, count >> 2);
-
- ptr += count;
- remain -= count;
-
- if (remain == 0)
- break;
-
- status = readl(base + MMCISTATUS);
- } while (status & MCI_RXDATAAVLBL);
-
- return ptr - buffer;
-}
-
-static int mmci_pio_write(struct mmci_host *host, char *buffer, unsigned int remain, u32 status)
-{
- void __iomem *base = host->base;
- char *ptr = buffer;
-
- do {
- unsigned int count, maxcnt;
-
- maxcnt = status & MCI_TXFIFOEMPTY ? MCI_FIFOSIZE : MCI_FIFOHALFSIZE;
- count = min(remain, maxcnt);
-
- writesl(base + MMCIFIFO, ptr, count >> 2);
-
- ptr += count;
- remain -= count;
-
- if (remain == 0)
- break;
-
- status = readl(base + MMCISTATUS);
- } while (status & MCI_TXFIFOHALFEMPTY);
-
- return ptr - buffer;
-}
-
-/*
- * PIO data transfer IRQ handler.
- */
-static irqreturn_t mmci_pio_irq(int irq, void *dev_id)
-{
- struct mmci_host *host = dev_id;
- void __iomem *base = host->base;
- u32 status;
-
- status = readl(base + MMCISTATUS);
-
- DBG(host, "irq1 %08x\n", status);
-
- do {
- unsigned long flags;
- unsigned int remain, len;
- char *buffer;
-
- /*
- * For write, we only need to test the half-empty flag
- * here - if the FIFO is completely empty, then by
- * definition it is more than half empty.
- *
- * For read, check for data available.
- */
- if (!(status & (MCI_TXFIFOHALFEMPTY|MCI_RXDATAAVLBL)))
- break;
-
- /*
- * Map the current scatter buffer.
- */
- buffer = mmci_kmap_atomic(host, &flags) + host->sg_off;
- remain = host->sg_ptr->length - host->sg_off;
-
- len = 0;
- if (status & MCI_RXACTIVE)
- len = mmci_pio_read(host, buffer, remain);
- if (status & MCI_TXACTIVE)
- len = mmci_pio_write(host, buffer, remain, status);
-
- /*
- * Unmap the buffer.
- */
- mmci_kunmap_atomic(host, buffer, &flags);
-
- host->sg_off += len;
- host->size -= len;
- remain -= len;
-
- if (remain)
- break;
-
- /*
- * If we were reading, and we have completed this
- * page, ensure that the data cache is coherent.
- */
- if (status & MCI_RXACTIVE)
- flush_dcache_page(host->sg_ptr->page);
-
- if (!mmci_next_sg(host))
- break;
-
- status = readl(base + MMCISTATUS);
- } while (1);
-
- /*
- * If we're nearing the end of the read, switch to
- * "any data available" mode.
- */
- if (status & MCI_RXACTIVE && host->size < MCI_FIFOSIZE)
- writel(MCI_RXDATAAVLBLMASK, base + MMCIMASK1);
-
- /*
- * If we run out of data, disable the data IRQs; this
- * prevents a race where the FIFO becomes empty before
- * the chip itself has disabled the data path, and
- * stops us racing with our data end IRQ.
- */
- if (host->size == 0) {
- writel(0, base + MMCIMASK1);
- writel(readl(base + MMCIMASK0) | MCI_DATAENDMASK, base + MMCIMASK0);
- }
-
- return IRQ_HANDLED;
-}
-
-/*
- * Handle completion of command and data transfers.
- */
-static irqreturn_t mmci_irq(int irq, void *dev_id)
-{
- struct mmci_host *host = dev_id;
- u32 status;
- int ret = 0;
-
- spin_lock(&host->lock);
-
- do {
- struct mmc_command *cmd;
- struct mmc_data *data;
-
- status = readl(host->base + MMCISTATUS);
- status &= readl(host->base + MMCIMASK0);
- writel(status, host->base + MMCICLEAR);
-
- DBG(host, "irq0 %08x\n", status);
-
- data = host->data;
- if (status & (MCI_DATACRCFAIL|MCI_DATATIMEOUT|MCI_TXUNDERRUN|
- MCI_RXOVERRUN|MCI_DATAEND|MCI_DATABLOCKEND) && data)
- mmci_data_irq(host, data, status);
-
- cmd = host->cmd;
- if (status & (MCI_CMDCRCFAIL|MCI_CMDTIMEOUT|MCI_CMDSENT|MCI_CMDRESPEND) && cmd)
- mmci_cmd_irq(host, cmd, status);
-
- ret = 1;
- } while (status);
-
- spin_unlock(&host->lock);
-
- return IRQ_RETVAL(ret);
-}
-
-static void mmci_request(struct mmc_host *mmc, struct mmc_request *mrq)
-{
- struct mmci_host *host = mmc_priv(mmc);
-
- WARN_ON(host->mrq != NULL);
-
- spin_lock_irq(&host->lock);
-
- host->mrq = mrq;
-
- if (mrq->data && mrq->data->flags & MMC_DATA_READ)
- mmci_start_data(host, mrq->data);
-
- mmci_start_command(host, mrq->cmd, 0);
-
- spin_unlock_irq(&host->lock);
-}
-
-static void mmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
-{
- struct mmci_host *host = mmc_priv(mmc);
- u32 clk = 0, pwr = 0;
-
- if (ios->clock) {
- if (ios->clock >= host->mclk) {
- clk = MCI_CLK_BYPASS;
- host->cclk = host->mclk;
- } else {
- clk = host->mclk / (2 * ios->clock) - 1;
- if (clk > 256)
- clk = 255;
- host->cclk = host->mclk / (2 * (clk + 1));
- }
- clk |= MCI_CLK_ENABLE;
- }
-
- if (host->plat->translate_vdd)
- pwr |= host->plat->translate_vdd(mmc_dev(mmc), ios->vdd);
-
- switch (ios->power_mode) {
- case MMC_POWER_OFF:
- break;
- case MMC_POWER_UP:
- pwr |= MCI_PWR_UP;
- break;
- case MMC_POWER_ON:
- pwr |= MCI_PWR_ON;
- break;
- }
-
- if (ios->bus_mode == MMC_BUSMODE_OPENDRAIN)
- pwr |= MCI_ROD;
-
- writel(clk, host->base + MMCICLOCK);
-
- if (host->pwr != pwr) {
- host->pwr = pwr;
- writel(pwr, host->base + MMCIPOWER);
- }
-}
-
-static const struct mmc_host_ops mmci_ops = {
- .request = mmci_request,
- .set_ios = mmci_set_ios,
-};
-
-static void mmci_check_status(unsigned long data)
-{
- struct mmci_host *host = (struct mmci_host *)data;
- unsigned int status;
-
- status = host->plat->status(mmc_dev(host->mmc));
- if (status ^ host->oldstat)
- mmc_detect_change(host->mmc, 0);
-
- host->oldstat = status;
- mod_timer(&host->timer, jiffies + HZ);
-}
-
-static int mmci_probe(struct amba_device *dev, void *id)
-{
- struct mmc_platform_data *plat = dev->dev.platform_data;
- struct mmci_host *host;
- struct mmc_host *mmc;
- int ret;
-
- /* must have platform data */
- if (!plat) {
- ret = -EINVAL;
- goto out;
- }
-
- ret = amba_request_regions(dev, DRIVER_NAME);
- if (ret)
- goto out;
-
- mmc = mmc_alloc_host(sizeof(struct mmci_host), &dev->dev);
- if (!mmc) {
- ret = -ENOMEM;
- goto rel_regions;
- }
-
- host = mmc_priv(mmc);
- host->clk = clk_get(&dev->dev, "MCLK");
- if (IS_ERR(host->clk)) {
- ret = PTR_ERR(host->clk);
- host->clk = NULL;
- goto host_free;
- }
-
- ret = clk_enable(host->clk);
- if (ret)
- goto clk_free;
-
- host->plat = plat;
- host->mclk = clk_get_rate(host->clk);
- host->mmc = mmc;
- host->base = ioremap(dev->res.start, SZ_4K);
- if (!host->base) {
- ret = -ENOMEM;
- goto clk_disable;
- }
-
- mmc->ops = &mmci_ops;
- mmc->f_min = (host->mclk + 511) / 512;
- mmc->f_max = min(host->mclk, fmax);
- mmc->ocr_avail = plat->ocr_mask;
- mmc->caps = MMC_CAP_MULTIWRITE;
-
- /*
- * We can do SGIO
- */
- mmc->max_hw_segs = 16;
- mmc->max_phys_segs = NR_SG;
-
- /*
- * Since we only have a 16-bit data length register, we must
- * ensure that we don't exceed 2^16-1 bytes in a single request.
- */
- mmc->max_req_size = 65535;
-
- /*
- * Set the maximum segment size. Since we aren't doing DMA
- * (yet) we are only limited by the data length register.
- */
- mmc->max_seg_size = mmc->max_req_size;
-
- /*
- * Block size can be up to 2048 bytes, but must be a power of two.
- */
- mmc->max_blk_size = 2048;
-
- /*
- * No limit on the number of blocks transferred.
- */
- mmc->max_blk_count = mmc->max_req_size;
-
- spin_lock_init(&host->lock);
-
- writel(0, host->base + MMCIMASK0);
- writel(0, host->base + MMCIMASK1);
- writel(0xfff, host->base + MMCICLEAR);
-
- ret = request_irq(dev->irq[0], mmci_irq, IRQF_SHARED, DRIVER_NAME " (cmd)", host);
- if (ret)
- goto unmap;
-
- ret = request_irq(dev->irq[1], mmci_pio_irq, IRQF_SHARED, DRIVER_NAME " (pio)", host);
- if (ret)
- goto irq0_free;
-
- writel(MCI_IRQENABLE, host->base + MMCIMASK0);
-
- amba_set_drvdata(dev, mmc);
-
- mmc_add_host(mmc);
-
- printk(KERN_INFO "%s: MMCI rev %x cfg %02x at 0x%016llx irq %d,%d\n",
- mmc_hostname(mmc), amba_rev(dev), amba_config(dev),
- (unsigned long long)dev->res.start, dev->irq[0], dev->irq[1]);
-
- init_timer(&host->timer);
- host->timer.data = (unsigned long)host;
- host->timer.function = mmci_check_status;
- host->timer.expires = jiffies + HZ;
- add_timer(&host->timer);
-
- return 0;
-
- irq0_free:
- free_irq(dev->irq[0], host);
- unmap:
- iounmap(host->base);
- clk_disable:
- clk_disable(host->clk);
- clk_free:
- clk_put(host->clk);
- host_free:
- mmc_free_host(mmc);
- rel_regions:
- amba_release_regions(dev);
- out:
- return ret;
-}
-
-static int mmci_remove(struct amba_device *dev)
-{
- struct mmc_host *mmc = amba_get_drvdata(dev);
-
- amba_set_drvdata(dev, NULL);
-
- if (mmc) {
- struct mmci_host *host = mmc_priv(mmc);
-
- del_timer_sync(&host->timer);
-
- mmc_remove_host(mmc);
-
- writel(0, host->base + MMCIMASK0);
- writel(0, host->base + MMCIMASK1);
-
- writel(0, host->base + MMCICOMMAND);
- writel(0, host->base + MMCIDATACTRL);
-
- free_irq(dev->irq[0], host);
- free_irq(dev->irq[1], host);
-
- iounmap(host->base);
- clk_disable(host->clk);
- clk_put(host->clk);
-
- mmc_free_host(mmc);
-
- amba_release_regions(dev);
- }
-
- return 0;
-}
-
-#ifdef CONFIG_PM
-static int mmci_suspend(struct amba_device *dev, pm_message_t state)
-{
- struct mmc_host *mmc = amba_get_drvdata(dev);
- int ret = 0;
-
- if (mmc) {
- struct mmci_host *host = mmc_priv(mmc);
-
- ret = mmc_suspend_host(mmc, state);
- if (ret == 0)
- writel(0, host->base + MMCIMASK0);
- }
-
- return ret;
-}
-
-static int mmci_resume(struct amba_device *dev)
-{
- struct mmc_host *mmc = amba_get_drvdata(dev);
- int ret = 0;
-
- if (mmc) {
- struct mmci_host *host = mmc_priv(mmc);
-
- writel(MCI_IRQENABLE, host->base + MMCIMASK0);
-
- ret = mmc_resume_host(mmc);
- }
-
- return ret;
-}
-#else
-#define mmci_suspend NULL
-#define mmci_resume NULL
-#endif
-
-static struct amba_id mmci_ids[] = {
- {
- .id = 0x00041180,
- .mask = 0x000fffff,
- },
- {
- .id = 0x00041181,
- .mask = 0x000fffff,
- },
- { 0, 0 },
-};
-
-static struct amba_driver mmci_driver = {
- .drv = {
- .name = DRIVER_NAME,
- },
- .probe = mmci_probe,
- .remove = mmci_remove,
- .suspend = mmci_suspend,
- .resume = mmci_resume,
- .id_table = mmci_ids,
-};
-
-static int __init mmci_init(void)
-{
- return amba_driver_register(&mmci_driver);
-}
-
-static void __exit mmci_exit(void)
-{
- amba_driver_unregister(&mmci_driver);
-}
-
-module_init(mmci_init);
-module_exit(mmci_exit);
-module_param(fmax, uint, 0444);
-
-MODULE_DESCRIPTION("ARM PrimeCell PL180/181 Multimedia Card Interface driver");
-MODULE_LICENSE("GPL");
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