+++ /dev/null
-From 2eccfcf4c5c50b412a0859a345d8d28fc043956b Mon Sep 17 00:00:00 2001
-From: Mike Lockwood <lockwood@android.com>
-Date: Thu, 7 Feb 2008 07:47:30 -0500
-Subject: [PATCH 124/134] [ARM] goldfish: mmc: goldfish MMC driver building and runnning in 2.6.27.
-
-Signed-off-by: Mike A. Chan <mikechan@google.com>
----
- drivers/mmc/host/Kconfig | 8 +
- drivers/mmc/host/Makefile | 1 +
- drivers/mmc/host/goldfish.c | 583 +++++++++++++++++++++++++++++++++++++++++++
- 3 files changed, 592 insertions(+), 0 deletions(-)
- create mode 100644 drivers/mmc/host/goldfish.c
-
---- a/drivers/mmc/host/Kconfig
-+++ b/drivers/mmc/host/Kconfig
-@@ -200,6 +200,14 @@ config MMC_MVSDIO
- To compile this driver as a module, choose M here: the
- module will be called mvsdio.
-
-+config MMC_GOLDFISH
-+ tristate "goldfish qemu Multimedia Card Interface support"
-+ depends on ARCH_GOLDFISH
-+ help
-+ This selects the Goldfish Multimedia card Interface emulation.
-+
-+ If unsure, say N.
-+
- config MMC_SPI
- tristate "MMC/SD/SDIO over SPI"
- depends on SPI_MASTER && !HIGHMEM && HAS_DMA
---- a/drivers/mmc/host/Makefile
-+++ b/drivers/mmc/host/Makefile
-@@ -26,6 +26,7 @@ obj-$(CONFIG_MMC_SPI) += mmc_spi.o
- ifeq ($(CONFIG_OF),y)
- obj-$(CONFIG_MMC_SPI) += of_mmc_spi.o
- endif
-+obj-$(CONFIG_MMC_GOLDFISH) += goldfish.o
- obj-$(CONFIG_MMC_S3C) += s3cmci.o
- obj-$(CONFIG_MMC_SDRICOH_CS) += sdricoh_cs.o
- obj-$(CONFIG_MMC_TMIO) += tmio_mmc.o
---- /dev/null
-+++ b/drivers/mmc/host/goldfish.c
-@@ -0,0 +1,583 @@
-+/*
-+ * linux/drivers/media/mmc/goldfish.c
-+ *
-+ * Copyright 2007, Google Inc.
-+ *
-+ * based on omap.c driver, which was
-+ * Copyright (C) 2004 Nokia Corporation
-+ * Written by Tuukka Tikkanen and Juha Yrjölä<juha.yrjola@nokia.com>
-+ * Misc hacks here and there by Tony Lindgren <tony@atomide.com>
-+ * Other hacks (DMA, SD, etc) by David Brownell
-+ *
-+ * 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/platform_device.h>
-+#include <linux/major.h>
-+
-+#include <linux/types.h>
-+#include <linux/pci.h>
-+#include <linux/interrupt.h>
-+
-+#include <linux/kernel.h>
-+#include <linux/fs.h>
-+#include <linux/errno.h>
-+#include <linux/hdreg.h>
-+#include <linux/kdev_t.h>
-+#include <linux/blkdev.h>
-+#include <linux/mutex.h>
-+#include <linux/scatterlist.h>
-+#include <linux/mmc/mmc.h>
-+#include <linux/mmc/sdio.h>
-+#include <linux/mmc/host.h>
-+#include <linux/mmc/card.h>
-+
-+#include <linux/moduleparam.h>
-+#include <linux/init.h>
-+#include <linux/ioport.h>
-+#include <linux/dma-mapping.h>
-+#include <linux/delay.h>
-+#include <linux/spinlock.h>
-+#include <linux/timer.h>
-+#include <linux/clk.h>
-+
-+#include <asm/io.h>
-+#include <asm/irq.h>
-+#include <asm/scatterlist.h>
-+#include <asm/mach-types.h>
-+
-+
-+#include <asm/types.h>
-+#include <asm/io.h>
-+#include <asm/uaccess.h>
-+
-+#define DRIVER_NAME "goldfish_mmc"
-+
-+#define BUFFER_SIZE 16384
-+
-+#define GOLDFISH_MMC_READ(host, addr) (readl(host->reg_base + addr))
-+#define GOLDFISH_MMC_WRITE(host, addr, x) (writel(x, host->reg_base + addr))
-+
-+
-+enum {
-+ /* status register */
-+ MMC_INT_STATUS = 0x00,
-+ /* set this to enable IRQ */
-+ MMC_INT_ENABLE = 0x04,
-+ /* set this to specify buffer address */
-+ MMC_SET_BUFFER = 0x08,
-+
-+ /* MMC command number */
-+ MMC_CMD = 0x0C,
-+
-+ /* MMC argument */
-+ MMC_ARG = 0x10,
-+
-+ /* MMC response (or R2 bits 0 - 31) */
-+ MMC_RESP_0 = 0x14,
-+
-+ /* MMC R2 response bits 32 - 63 */
-+ MMC_RESP_1 = 0x18,
-+
-+ /* MMC R2 response bits 64 - 95 */
-+ MMC_RESP_2 = 0x1C,
-+
-+ /* MMC R2 response bits 96 - 127 */
-+ MMC_RESP_3 = 0x20,
-+
-+ MMC_BLOCK_LENGTH = 0x24,
-+ MMC_BLOCK_COUNT = 0x28,
-+
-+ /* MMC state flags */
-+ MMC_STATE = 0x2C,
-+
-+ /* MMC_INT_STATUS bits */
-+
-+ MMC_STAT_END_OF_CMD = 1U << 0,
-+ MMC_STAT_END_OF_DATA = 1U << 1,
-+ MMC_STAT_STATE_CHANGE = 1U << 2,
-+
-+ /* MMC_STATE bits */
-+ MMC_STATE_INSERTED = 1U << 0,
-+ MMC_STATE_READ_ONLY = 1U << 1,
-+};
-+
-+/*
-+ * Command types
-+ */
-+#define OMAP_MMC_CMDTYPE_BC 0
-+#define OMAP_MMC_CMDTYPE_BCR 1
-+#define OMAP_MMC_CMDTYPE_AC 2
-+#define OMAP_MMC_CMDTYPE_ADTC 3
-+
-+
-+struct goldfish_mmc_host {
-+ struct mmc_request * mrq;
-+ struct mmc_command * cmd;
-+ struct mmc_data * data;
-+ struct mmc_host * mmc;
-+ struct device * dev;
-+ unsigned char id; /* 16xx chips have 2 MMC blocks */
-+ void __iomem *virt_base;
-+ unsigned int phys_base;
-+ int irq;
-+ unsigned char bus_mode;
-+ unsigned char hw_bus_mode;
-+
-+ unsigned int sg_len;
-+ unsigned dma_done:1;
-+ unsigned dma_in_use:1;
-+
-+ struct work_struct switch_work;
-+ int switch_last_state;
-+
-+ uint32_t reg_base;
-+};
-+
-+static inline int
-+goldfish_mmc_cover_is_open(struct goldfish_mmc_host *host)
-+{
-+ return 0;
-+}
-+
-+static ssize_t
-+goldfish_mmc_show_cover_switch(struct device *dev,
-+ struct device_attribute *attr, char *buf)
-+{
-+ struct goldfish_mmc_host *host = dev_get_drvdata(dev);
-+
-+ return sprintf(buf, "%s\n", goldfish_mmc_cover_is_open(host) ? "open" :
-+ "closed");
-+}
-+
-+static DEVICE_ATTR(cover_switch, S_IRUGO, goldfish_mmc_show_cover_switch, NULL);
-+
-+static void
-+goldfish_mmc_start_command(struct goldfish_mmc_host *host, struct mmc_command *cmd)
-+{
-+ u32 cmdreg;
-+ u32 resptype;
-+ u32 cmdtype;
-+
-+ host->cmd = cmd;
-+
-+ resptype = 0;
-+ cmdtype = 0;
-+
-+ /* Our hardware needs to know exact type */
-+ switch (mmc_resp_type(cmd)) {
-+ case MMC_RSP_NONE:
-+ break;
-+ case MMC_RSP_R1:
-+ case MMC_RSP_R1B:
-+ /* resp 1, 1b, 6, 7 */
-+ resptype = 1;
-+ break;
-+ case MMC_RSP_R2:
-+ resptype = 2;
-+ break;
-+ case MMC_RSP_R3:
-+ resptype = 3;
-+ break;
-+ default:
-+ dev_err(mmc_dev(host->mmc), "Invalid response type: %04x\n", mmc_resp_type(cmd));
-+ break;
-+ }
-+
-+ if (mmc_cmd_type(cmd) == MMC_CMD_ADTC) {
-+ cmdtype = OMAP_MMC_CMDTYPE_ADTC;
-+ } else if (mmc_cmd_type(cmd) == MMC_CMD_BC) {
-+ cmdtype = OMAP_MMC_CMDTYPE_BC;
-+ } else if (mmc_cmd_type(cmd) == MMC_CMD_BCR) {
-+ cmdtype = OMAP_MMC_CMDTYPE_BCR;
-+ } else {
-+ cmdtype = OMAP_MMC_CMDTYPE_AC;
-+ }
-+
-+ cmdreg = cmd->opcode | (resptype << 8) | (cmdtype << 12);
-+
-+ if (host->bus_mode == MMC_BUSMODE_OPENDRAIN)
-+ cmdreg |= 1 << 6;
-+
-+ if (cmd->flags & MMC_RSP_BUSY)
-+ cmdreg |= 1 << 11;
-+
-+ if (host->data && !(host->data->flags & MMC_DATA_WRITE))
-+ cmdreg |= 1 << 15;
-+
-+ GOLDFISH_MMC_WRITE(host, MMC_ARG, cmd->arg);
-+ GOLDFISH_MMC_WRITE(host, MMC_CMD, cmdreg);
-+}
-+
-+static void
-+goldfish_mmc_xfer_done(struct goldfish_mmc_host *host, struct mmc_data *data)
-+{
-+ if (host->dma_in_use) {
-+ enum dma_data_direction dma_data_dir;
-+
-+ if (data->flags & MMC_DATA_WRITE)
-+ dma_data_dir = DMA_TO_DEVICE;
-+ else
-+ dma_data_dir = DMA_FROM_DEVICE;
-+
-+ if (dma_data_dir == DMA_FROM_DEVICE) {
-+ // we don't really have DMA, so we need to copy from our platform driver buffer
-+ uint8_t* dest = (uint8_t *)sg_virt(data->sg);
-+ memcpy(dest, host->virt_base, data->sg->length);
-+ }
-+
-+ host->data->bytes_xfered += data->sg->length;
-+
-+ dma_unmap_sg(mmc_dev(host->mmc), data->sg, host->sg_len, dma_data_dir);
-+ }
-+
-+ host->data = NULL;
-+ host->sg_len = 0;
-+
-+ /* NOTE: MMC layer will sometimes poll-wait CMD13 next, issuing
-+ * dozens of requests until the card finishes writing data.
-+ * It'd be cheaper to just wait till an EOFB interrupt arrives...
-+ */
-+
-+ if (!data->stop) {
-+ host->mrq = NULL;
-+ mmc_request_done(host->mmc, data->mrq);
-+ return;
-+ }
-+
-+ goldfish_mmc_start_command(host, data->stop);
-+}
-+
-+static void
-+goldfish_mmc_end_of_data(struct goldfish_mmc_host *host, struct mmc_data *data)
-+{
-+ if (!host->dma_in_use) {
-+ goldfish_mmc_xfer_done(host, data);
-+ return;
-+ }
-+ if (host->dma_done)
-+ goldfish_mmc_xfer_done(host, data);
-+}
-+
-+static void
-+goldfish_mmc_cmd_done(struct goldfish_mmc_host *host, struct mmc_command *cmd)
-+{
-+ host->cmd = NULL;
-+ if (cmd->flags & MMC_RSP_PRESENT) {
-+ if (cmd->flags & MMC_RSP_136) {
-+ /* response type 2 */
-+ cmd->resp[3] =
-+ GOLDFISH_MMC_READ(host, MMC_RESP_0);
-+ cmd->resp[2] =
-+ GOLDFISH_MMC_READ(host, MMC_RESP_1);
-+ cmd->resp[1] =
-+ GOLDFISH_MMC_READ(host, MMC_RESP_2);
-+ cmd->resp[0] =
-+ GOLDFISH_MMC_READ(host, MMC_RESP_3);
-+ } else {
-+ /* response types 1, 1b, 3, 4, 5, 6 */
-+ cmd->resp[0] =
-+ GOLDFISH_MMC_READ(host, MMC_RESP_0);
-+ }
-+ }
-+
-+ if (host->data == NULL || cmd->error) {
-+ host->mrq = NULL;
-+ mmc_request_done(host->mmc, cmd->mrq);
-+ }
-+}
-+
-+static irqreturn_t goldfish_mmc_irq(int irq, void *dev_id)
-+{
-+ struct goldfish_mmc_host * host = (struct goldfish_mmc_host *)dev_id;
-+ u16 status;
-+ int end_command;
-+ int end_transfer;
-+ int transfer_error;
-+ int state_changed;
-+
-+ if (host->cmd == NULL && host->data == NULL) {
-+ status = GOLDFISH_MMC_READ(host, MMC_INT_STATUS);
-+ dev_info(mmc_dev(host->mmc),"spurious irq 0x%04x\n", status);
-+ if (status != 0) {
-+ GOLDFISH_MMC_WRITE(host, MMC_INT_STATUS, status);
-+ GOLDFISH_MMC_WRITE(host, MMC_INT_ENABLE, 0);
-+ }
-+ return IRQ_HANDLED;
-+ }
-+
-+ end_command = 0;
-+ end_transfer = 0;
-+ transfer_error = 0;
-+ state_changed = 0;
-+
-+ while ((status = GOLDFISH_MMC_READ(host, MMC_INT_STATUS)) != 0) {
-+ GOLDFISH_MMC_WRITE(host, MMC_INT_STATUS, status);
-+
-+ if (status & MMC_STAT_END_OF_CMD) {
-+ end_command = 1;
-+ }
-+
-+ if (status & MMC_STAT_END_OF_DATA) {
-+ end_transfer = 1;
-+ }
-+ if (status & MMC_STAT_STATE_CHANGE) {
-+ state_changed = 1;
-+ }
-+ }
-+
-+ if (end_command) {
-+ goldfish_mmc_cmd_done(host, host->cmd);
-+ }
-+ if (transfer_error)
-+ goldfish_mmc_xfer_done(host, host->data);
-+ else if (end_transfer) {
-+ host->dma_done = 1;
-+ goldfish_mmc_end_of_data(host, host->data);
-+ }
-+ if (state_changed) {
-+ schedule_work(&host->switch_work);
-+ }
-+
-+ return IRQ_HANDLED;
-+}
-+
-+
-+static void goldfish_mmc_switch_handler(struct work_struct *work)
-+{
-+/*
-+ struct goldfish_mmc_host *host = container_of(work, struct goldfish_mmc_host, switch_work);
-+ struct mmc_card *card;
-+ static int complained = 0;
-+ int cards = 0, cover_open;
-+
-+ cover_open = goldfish_mmc_cover_is_open(host);
-+ if (cover_open != host->switch_last_state) {
-+ kobject_uevent(&host->dev->kobj, KOBJ_CHANGE);
-+ host->switch_last_state = cover_open;
-+ }
-+ mmc_detect_change(host->mmc, 0);
-+ list_for_each_entry(card, &host->mmc->cards, node) {
-+ if (mmc_card_present(card))
-+ cards++;
-+ }
-+ if (goldfish_mmc_cover_is_open(host)) {
-+ if (!complained) {
-+ dev_info(mmc_dev(host->mmc), "cover is open\n");
-+ complained = 1;
-+ }
-+ } else {
-+ complained = 0;
-+ }
-+*/
-+}
-+
-+
-+static void
-+goldfish_mmc_prepare_data(struct goldfish_mmc_host *host, struct mmc_request *req)
-+{
-+ struct mmc_data *data = req->data;
-+ int block_size;
-+ unsigned sg_len;
-+ enum dma_data_direction dma_data_dir;
-+
-+ host->data = data;
-+ if (data == NULL) {
-+ GOLDFISH_MMC_WRITE(host, MMC_BLOCK_LENGTH, 0);
-+ GOLDFISH_MMC_WRITE(host, MMC_BLOCK_COUNT, 0);
-+ host->dma_in_use = 0;
-+ return;
-+ }
-+
-+ block_size = data->blksz;
-+
-+ GOLDFISH_MMC_WRITE(host, MMC_BLOCK_COUNT, data->blocks - 1);
-+ GOLDFISH_MMC_WRITE(host, MMC_BLOCK_LENGTH, block_size - 1);
-+
-+ /* cope with calling layer confusion; it issues "single
-+ * block" writes using multi-block scatterlists.
-+ */
-+ sg_len = (data->blocks == 1) ? 1 : data->sg_len;
-+
-+ if (data->flags & MMC_DATA_WRITE)
-+ dma_data_dir = DMA_TO_DEVICE;
-+ else
-+ dma_data_dir = DMA_FROM_DEVICE;
-+
-+ host->sg_len = dma_map_sg(mmc_dev(host->mmc), data->sg,
-+ sg_len, dma_data_dir);
-+ host->dma_done = 0;
-+ host->dma_in_use = 1;
-+
-+ if (dma_data_dir == DMA_TO_DEVICE) {
-+ // we don't really have DMA, so we need to copy to our platform driver buffer
-+ const uint8_t* src = (uint8_t *)sg_virt(data->sg);
-+ memcpy(host->virt_base, src, data->sg->length);
-+ }
-+}
-+
-+static void goldfish_mmc_request(struct mmc_host *mmc, struct mmc_request *req)
-+{
-+ struct goldfish_mmc_host *host = mmc_priv(mmc);
-+
-+ WARN_ON(host->mrq != NULL);
-+
-+ host->mrq = req;
-+ goldfish_mmc_prepare_data(host, req);
-+ goldfish_mmc_start_command(host, req->cmd);
-+
-+ /* this is to avoid accidentally being detected as an SDIO card in mmc_attach_sdio() */
-+ if (req->cmd->opcode == SD_IO_SEND_OP_COND &&
-+ req->cmd->flags == (MMC_RSP_SPI_R4 | MMC_RSP_R4 | MMC_CMD_BCR)) {
-+ req->cmd->error = -EINVAL;
-+ }
-+}
-+
-+static void goldfish_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
-+{
-+ struct goldfish_mmc_host *host = mmc_priv(mmc);
-+
-+ host->bus_mode = ios->bus_mode;
-+ host->hw_bus_mode = host->bus_mode;
-+}
-+
-+static int goldfish_mmc_get_ro(struct mmc_host *mmc)
-+{
-+ uint32_t state;
-+ struct goldfish_mmc_host *host = mmc_priv(mmc);
-+
-+ state = GOLDFISH_MMC_READ(host, MMC_STATE);
-+ return ((state & MMC_STATE_READ_ONLY) != 0);
-+}
-+
-+static const struct mmc_host_ops goldfish_mmc_ops = {
-+ .request = goldfish_mmc_request,
-+ .set_ios = goldfish_mmc_set_ios,
-+ .get_ro = goldfish_mmc_get_ro,
-+};
-+
-+static int __init goldfish_mmc_probe(struct platform_device *pdev)
-+{
-+ struct mmc_host *mmc;
-+ struct goldfish_mmc_host *host = NULL;
-+ struct resource *res;
-+ int ret = 0;
-+ int irq;
-+ dma_addr_t buf_addr;
-+
-+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-+ irq = platform_get_irq(pdev, 0);
-+ if (res == NULL || irq < 0)
-+ return -ENXIO;
-+
-+ mmc = mmc_alloc_host(sizeof(struct goldfish_mmc_host), &pdev->dev);
-+ if (mmc == NULL) {
-+ ret = -ENOMEM;
-+ goto err_alloc_host_failed;
-+ }
-+
-+ host = mmc_priv(mmc);
-+ host->mmc = mmc;
-+ host->reg_base = IO_ADDRESS(res->start - IO_START);
-+ host->virt_base = dma_alloc_writecombine(&pdev->dev, BUFFER_SIZE,
-+ &buf_addr, GFP_KERNEL);
-+ if(host->virt_base == 0) {
-+ ret = -EBUSY;
-+ goto dma_alloc_failed;
-+ }
-+ host->phys_base = buf_addr;
-+
-+ host->id = pdev->id;
-+ host->irq = irq;
-+
-+ mmc->ops = &goldfish_mmc_ops;
-+ mmc->f_min = 400000;
-+ mmc->f_max = 24000000;
-+ mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34;
-+ mmc->caps = MMC_CAP_4_BIT_DATA;
-+
-+ /* Use scatterlist DMA to reduce per-transfer costs.
-+ * NOTE max_seg_size assumption that small blocks aren't
-+ * normally used (except e.g. for reading SD registers).
-+ */
-+ mmc->max_phys_segs = 32;
-+ mmc->max_hw_segs = 32;
-+ mmc->max_blk_size = 2048; /* MMC_BLOCK_LENGTH is 11 bits (+1) */
-+ mmc->max_blk_count = 2048; /* MMC_BLOCK_COUNT is 11 bits (+1) */
-+ mmc->max_req_size = BUFFER_SIZE;
-+ mmc->max_seg_size = mmc->max_req_size;
-+
-+ ret = request_irq(host->irq, goldfish_mmc_irq, 0, DRIVER_NAME, host);
-+ if (ret)
-+ goto err_request_irq_failed;
-+
-+ host->dev = &pdev->dev;
-+ platform_set_drvdata(pdev, host);
-+
-+ ret = device_create_file(&pdev->dev, &dev_attr_cover_switch);
-+ if (ret)
-+ dev_warn(mmc_dev(host->mmc), "Unable to create sysfs attributes\n");
-+
-+ mmc_add_host(mmc);
-+
-+ GOLDFISH_MMC_WRITE(host, MMC_SET_BUFFER, host->phys_base);
-+ GOLDFISH_MMC_WRITE(host, MMC_INT_ENABLE,
-+ MMC_STAT_END_OF_CMD | MMC_STAT_END_OF_DATA | MMC_STAT_STATE_CHANGE
-+ );
-+
-+ // we start with the card present
-+ kobject_uevent(&host->dev->kobj, KOBJ_CHANGE);
-+ mmc_detect_change(host->mmc, 0);
-+
-+ INIT_WORK(&host->switch_work, goldfish_mmc_switch_handler);
-+
-+ return 0;
-+
-+err_request_irq_failed:
-+ dma_free_writecombine(&pdev->dev, BUFFER_SIZE, host->virt_base, host->phys_base);
-+dma_alloc_failed:
-+ mmc_free_host(host->mmc);
-+err_alloc_host_failed:
-+ return ret;
-+}
-+
-+static int goldfish_mmc_remove(struct platform_device *pdev)
-+{
-+ struct goldfish_mmc_host *host = platform_get_drvdata(pdev);
-+
-+ platform_set_drvdata(pdev, NULL);
-+
-+ BUG_ON(host == NULL);
-+
-+ mmc_remove_host(host->mmc);
-+ free_irq(host->irq, host);
-+ dma_free_writecombine(&pdev->dev, BUFFER_SIZE, host->virt_base, host->phys_base);
-+ mmc_free_host(host->mmc);
-+
-+ return 0;
-+}
-+
-+static struct platform_driver goldfish_mmc_driver = {
-+ .probe = goldfish_mmc_probe,
-+ .remove = goldfish_mmc_remove,
-+ .driver = {
-+ .name = DRIVER_NAME,
-+ },
-+};
-+
-+static int __init goldfish_mmc_init(void)
-+{
-+ return platform_driver_register(&goldfish_mmc_driver);
-+}
-+
-+static void __exit goldfish_mmc_exit(void)
-+{
-+ platform_driver_unregister(&goldfish_mmc_driver);
-+}
-+
-+module_init(goldfish_mmc_init);
-+module_exit(goldfish_mmc_exit);
-+
projects / openwrt / staging / chunkeey.git / blobdiff