| Message ID | 20210209190850.16647-1-rkir@google.com |
|---|---|
| State | New |
| Headers | show |
| Series | drivers: mmc: host: Retire MMC_GOLDFISH | expand |
On Tue, 9 Feb 2021 at 20:09, <rkir@google.com> wrote: > > From: Roman Kiryanov <rkir@google.com> > > Android Studio Emulator no longer uses > this driver. > > Signed-off-by: Roman Kiryanov <rkir@google.com> Applied for next, thanks! Kind regards Uffe > --- > drivers/mmc/host/Kconfig | 7 - > drivers/mmc/host/Makefile | 1 - > drivers/mmc/host/android-goldfish.c | 545 ---------------------------- > 3 files changed, 553 deletions(-) > delete mode 100644 drivers/mmc/host/android-goldfish.c > > diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig > index 596f32637315..ad4678c9bac1 100644 > --- a/drivers/mmc/host/Kconfig > +++ b/drivers/mmc/host/Kconfig > @@ -608,13 +608,6 @@ config MMC_DAVINCI > If you have an DAVINCI board with a Multimedia Card slot, > say Y or M here. If unsure, say N. > > -config MMC_GOLDFISH > - tristate "goldfish qemu Multimedia Card Interface support" > - depends on GOLDFISH || COMPILE_TEST > - help > - This selects the Goldfish Multimedia card Interface emulation > - found on the Goldfish Android virtual device emulation. > - > config MMC_SPI > tristate "MMC/SD/SDIO over SPI" > depends on SPI_MASTER > diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile > index 451c25fc2c69..7f97e97f7066 100644 > --- a/drivers/mmc/host/Makefile > +++ b/drivers/mmc/host/Makefile > @@ -34,7 +34,6 @@ obj-$(CONFIG_MMC_ATMELMCI) += atmel-mci.o > obj-$(CONFIG_MMC_TIFM_SD) += tifm_sd.o > obj-$(CONFIG_MMC_MVSDIO) += mvsdio.o > obj-$(CONFIG_MMC_DAVINCI) += davinci_mmc.o > -obj-$(CONFIG_MMC_GOLDFISH) += android-goldfish.o > obj-$(CONFIG_MMC_SPI) += mmc_spi.o > ifeq ($(CONFIG_OF),y) > obj-$(CONFIG_MMC_SPI) += of_mmc_spi.o > diff --git a/drivers/mmc/host/android-goldfish.c b/drivers/mmc/host/android-goldfish.c > deleted file mode 100644 > index e878fdf8f20a..000000000000 > --- a/drivers/mmc/host/android-goldfish.c > +++ /dev/null > @@ -1,545 +0,0 @@ > -// SPDX-License-Identifier: GPL-2.0-only > -/* > - * Copyright 2007, Google Inc. > - * Copyright 2012, Intel 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 > - */ > - > -#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/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/types.h> > -#include <linux/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_STAT_CMD_TIMEOUT = 1U << 3, > - > - /* 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 device *dev; > - unsigned char id; /* 16xx chips have 2 MMC blocks */ > - void *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; > - > - void __iomem *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(mmc_from_priv(host)), > - "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; > - > - dma_data_dir = mmc_get_dma_dir(data); > - > - if (dma_data_dir == DMA_FROM_DEVICE) { > - /* > - * We don't really have DMA, so we need > - * to copy from our platform driver buffer > - */ > - sg_copy_from_buffer(data->sg, 1, host->virt_base, > - data->sg->length); > - } > - host->data->bytes_xfered += data->sg->length; > - dma_unmap_sg(mmc_dev(mmc_from_priv(host)), 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(mmc_from_priv(host), 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(mmc_from_priv(host), 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 = 0; > - int end_transfer = 0; > - int state_changed = 0; > - int cmd_timeout = 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 (status & MMC_STAT_CMD_TIMEOUT) { > - end_command = 0; > - cmd_timeout = 1; > - } > - } > - > - if (cmd_timeout) { > - struct mmc_request *mrq = host->mrq; > - mrq->cmd->error = -ETIMEDOUT; > - host->mrq = NULL; > - mmc_request_done(mmc_from_priv(host), mrq); > - } > - > - if (end_command) > - goldfish_mmc_cmd_done(host, host->cmd); > - > - if (end_transfer) { > - host->dma_done = 1; > - goldfish_mmc_end_of_data(host, host->data); > - } else if (host->data != NULL) { > - /* > - * WORKAROUND -- after porting this driver from 2.6 to 3.4, > - * during device initialization, cases where host->data is > - * non-null but end_transfer is false would occur. Doing > - * nothing in such cases results in no further interrupts, > - * and initialization failure. > - * TODO -- find the real cause. > - */ > - host->dma_done = 1; > - goldfish_mmc_end_of_data(host, host->data); > - } > - > - if (state_changed) { > - u32 state = GOLDFISH_MMC_READ(host, MMC_STATE); > - pr_info("%s: Card detect now %d\n", __func__, > - (state & MMC_STATE_INSERTED)); > - mmc_detect_change(mmc_from_priv(host), 0); > - } > - > - if (!end_command && !end_transfer && !state_changed && !cmd_timeout) { > - status = GOLDFISH_MMC_READ(host, MMC_INT_STATUS); > - dev_info(mmc_dev(mmc_from_priv(host)), "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; > -} > - > -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; > - > - dma_data_dir = mmc_get_dma_dir(data); > - > - host->sg_len = dma_map_sg(mmc_dev(mmc_from_priv(host)), 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 > - */ > - sg_copy_to_buffer(data->sg, 1, host->virt_base, > - 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); > -} > - > -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 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); > - > - pr_err("mmc: Mapping %lX to %lX\n", (long)res->start, (long)res->end); > - host->reg_base = ioremap(res->start, resource_size(res)); > - if (host->reg_base == NULL) { > - ret = -ENOMEM; > - goto ioremap_failed; > - } > - host->virt_base = dma_alloc_coherent(&pdev->dev, BUFFER_SIZE, > - &buf_addr, GFP_KERNEL); > - > - if (host->virt_base == 0) { > - ret = -ENOMEM; > - 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; > - mmc->caps2 = MMC_CAP2_NO_SDIO; > - > - /* 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_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) { > - dev_err(&pdev->dev, "Failed IRQ Adding goldfish MMC\n"); > - 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(mmc), "Unable to create sysfs attributes\n"); > - > - 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 | MMC_STAT_CMD_TIMEOUT); > - > - mmc_add_host(mmc); > - return 0; > - > -err_request_irq_failed: > - dma_free_coherent(&pdev->dev, BUFFER_SIZE, host->virt_base, > - host->phys_base); > -dma_alloc_failed: > - iounmap(host->reg_base); > -ioremap_failed: > - mmc_free_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); > - struct mmc_host *mmc = mmc_from_priv(host); > - > - BUG_ON(host == NULL); > - > - mmc_remove_host(mmc); > - free_irq(host->irq, host); > - dma_free_coherent(&pdev->dev, BUFFER_SIZE, host->virt_base, host->phys_base); > - iounmap(host->reg_base); > - mmc_free_host(mmc); > - return 0; > -} > - > -static struct platform_driver goldfish_mmc_driver = { > - .probe = goldfish_mmc_probe, > - .remove = goldfish_mmc_remove, > - .driver = { > - .name = DRIVER_NAME, > - .probe_type = PROBE_PREFER_ASYNCHRONOUS, > - }, > -}; > - > -module_platform_driver(goldfish_mmc_driver); > -MODULE_LICENSE("GPL v2"); > -- > 2.30.0.478.g8a0d178c01-goog >
diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig index 596f32637315..ad4678c9bac1 100644 --- a/drivers/mmc/host/Kconfig +++ b/drivers/mmc/host/Kconfig @@ -608,13 +608,6 @@ config MMC_DAVINCI If you have an DAVINCI board with a Multimedia Card slot, say Y or M here. If unsure, say N. -config MMC_GOLDFISH - tristate "goldfish qemu Multimedia Card Interface support" - depends on GOLDFISH || COMPILE_TEST - help - This selects the Goldfish Multimedia card Interface emulation - found on the Goldfish Android virtual device emulation. - config MMC_SPI tristate "MMC/SD/SDIO over SPI" depends on SPI_MASTER diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile index 451c25fc2c69..7f97e97f7066 100644 --- a/drivers/mmc/host/Makefile +++ b/drivers/mmc/host/Makefile @@ -34,7 +34,6 @@ obj-$(CONFIG_MMC_ATMELMCI) += atmel-mci.o obj-$(CONFIG_MMC_TIFM_SD) += tifm_sd.o obj-$(CONFIG_MMC_MVSDIO) += mvsdio.o obj-$(CONFIG_MMC_DAVINCI) += davinci_mmc.o -obj-$(CONFIG_MMC_GOLDFISH) += android-goldfish.o obj-$(CONFIG_MMC_SPI) += mmc_spi.o ifeq ($(CONFIG_OF),y) obj-$(CONFIG_MMC_SPI) += of_mmc_spi.o diff --git a/drivers/mmc/host/android-goldfish.c b/drivers/mmc/host/android-goldfish.c deleted file mode 100644 index e878fdf8f20a..000000000000 --- a/drivers/mmc/host/android-goldfish.c +++ /dev/null @@ -1,545 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * Copyright 2007, Google Inc. - * Copyright 2012, Intel 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 - */ - -#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/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/types.h> -#include <linux/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_STAT_CMD_TIMEOUT = 1U << 3, - - /* 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 device *dev; - unsigned char id; /* 16xx chips have 2 MMC blocks */ - void *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; - - void __iomem *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(mmc_from_priv(host)), - "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; - - dma_data_dir = mmc_get_dma_dir(data); - - if (dma_data_dir == DMA_FROM_DEVICE) { - /* - * We don't really have DMA, so we need - * to copy from our platform driver buffer - */ - sg_copy_from_buffer(data->sg, 1, host->virt_base, - data->sg->length); - } - host->data->bytes_xfered += data->sg->length; - dma_unmap_sg(mmc_dev(mmc_from_priv(host)), 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(mmc_from_priv(host), 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(mmc_from_priv(host), 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 = 0; - int end_transfer = 0; - int state_changed = 0; - int cmd_timeout = 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 (status & MMC_STAT_CMD_TIMEOUT) { - end_command = 0; - cmd_timeout = 1; - } - } - - if (cmd_timeout) { - struct mmc_request *mrq = host->mrq; - mrq->cmd->error = -ETIMEDOUT; - host->mrq = NULL; - mmc_request_done(mmc_from_priv(host), mrq); - } - - if (end_command) - goldfish_mmc_cmd_done(host, host->cmd); - - if (end_transfer) { - host->dma_done = 1; - goldfish_mmc_end_of_data(host, host->data); - } else if (host->data != NULL) { - /* - * WORKAROUND -- after porting this driver from 2.6 to 3.4, - * during device initialization, cases where host->data is - * non-null but end_transfer is false would occur. Doing - * nothing in such cases results in no further interrupts, - * and initialization failure. - * TODO -- find the real cause. - */ - host->dma_done = 1; - goldfish_mmc_end_of_data(host, host->data); - } - - if (state_changed) { - u32 state = GOLDFISH_MMC_READ(host, MMC_STATE); - pr_info("%s: Card detect now %d\n", __func__, - (state & MMC_STATE_INSERTED)); - mmc_detect_change(mmc_from_priv(host), 0); - } - - if (!end_command && !end_transfer && !state_changed && !cmd_timeout) { - status = GOLDFISH_MMC_READ(host, MMC_INT_STATUS); - dev_info(mmc_dev(mmc_from_priv(host)), "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; -} - -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; - - dma_data_dir = mmc_get_dma_dir(data); - - host->sg_len = dma_map_sg(mmc_dev(mmc_from_priv(host)), 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 - */ - sg_copy_to_buffer(data->sg, 1, host->virt_base, - 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); -} - -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 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); - - pr_err("mmc: Mapping %lX to %lX\n", (long)res->start, (long)res->end); - host->reg_base = ioremap(res->start, resource_size(res)); - if (host->reg_base == NULL) { - ret = -ENOMEM; - goto ioremap_failed; - } - host->virt_base = dma_alloc_coherent(&pdev->dev, BUFFER_SIZE, - &buf_addr, GFP_KERNEL); - - if (host->virt_base == 0) { - ret = -ENOMEM; - 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; - mmc->caps2 = MMC_CAP2_NO_SDIO; - - /* 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_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) { - dev_err(&pdev->dev, "Failed IRQ Adding goldfish MMC\n"); - 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(mmc), "Unable to create sysfs attributes\n"); - - 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 | MMC_STAT_CMD_TIMEOUT); - - mmc_add_host(mmc); - return 0; - -err_request_irq_failed: - dma_free_coherent(&pdev->dev, BUFFER_SIZE, host->virt_base, - host->phys_base); -dma_alloc_failed: - iounmap(host->reg_base); -ioremap_failed: - mmc_free_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); - struct mmc_host *mmc = mmc_from_priv(host); - - BUG_ON(host == NULL); - - mmc_remove_host(mmc); - free_irq(host->irq, host); - dma_free_coherent(&pdev->dev, BUFFER_SIZE, host->virt_base, host->phys_base); - iounmap(host->reg_base); - mmc_free_host(mmc); - return 0; -} - -static struct platform_driver goldfish_mmc_driver = { - .probe = goldfish_mmc_probe, - .remove = goldfish_mmc_remove, - .driver = { - .name = DRIVER_NAME, - .probe_type = PROBE_PREFER_ASYNCHRONOUS, - }, -}; - -module_platform_driver(goldfish_mmc_driver); -MODULE_LICENSE("GPL v2");