diff options
Diffstat (limited to 'target/linux/goldfish/patches-2.6.30/0124--ARM-goldfish-mmc-goldfish-MMC-driver-building-an.patch')
| -rw-r--r-- | target/linux/goldfish/patches-2.6.30/0124--ARM-goldfish-mmc-goldfish-MMC-driver-building-an.patch | 626 |
1 files changed, 626 insertions, 0 deletions
diff --git a/target/linux/goldfish/patches-2.6.30/0124--ARM-goldfish-mmc-goldfish-MMC-driver-building-an.patch b/target/linux/goldfish/patches-2.6.30/0124--ARM-goldfish-mmc-goldfish-MMC-driver-building-an.patch new file mode 100644 index 000000000..58ccbb0b1 --- /dev/null +++ b/target/linux/goldfish/patches-2.6.30/0124--ARM-goldfish-mmc-goldfish-MMC-driver-building-an.patch @@ -0,0 +1,626 @@ +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); ++ |