[1/2] mmc: tmio: rename files and CONFIG options to have the same prefix

Message ID	1532575736-20138-2-git-send-email-yamada.masahiro@socionext.com (mailing list archive)
State	Under Review
Delegated to:	Geert Uytterhoeven
Headers	show Return-Path: <linux-renesas-soc-owner@kernel.org> From: Masahiro Yamada <yamada.masahiro@socionext.com> To: Wolfram Sang <wsa+renesas@sang-engineering.com>, linux-mmc@vger.kernel.org, Ulf Hansson <ulf.hansson@linaro.org>, Rob Herring <robh+dt@kernel.org> Cc: devicetree@vger.kernel.org, linux-renesas-soc@vger.kernel.org, linux-kernel@vger.kernel.org, Masahiro Yamada <yamada.masahiro@socionext.com> Subject: [PATCH 1/2] mmc: tmio: rename files and CONFIG options to have the same prefix Date: Thu, 26 Jul 2018 12:28:55 +0900 Message-Id: <1532575736-20138-2-git-send-email-yamada.masahiro@socionext.com> In-Reply-To: <1532575736-20138-1-git-send-email-yamada.masahiro@socionext.com> References: <1532575736-20138-1-git-send-email-yamada.masahiro@socionext.com> Sender: linux-renesas-soc-owner@vger.kernel.org Precedence: bulk
Series	mmc: tmio: rename variants to have consistent prefix \| expand [0/2] mmc: tmio: rename variants to have consistent prefix [1/2] mmc: tmio: rename files and CONFIG options to have the same prefix [2/2] dt-binding: mmc: rename tmio_mmc.txt to renesas_sdhi.txt

diff --git a/MAINTAINERS b/MAINTAINERS index 0fe4228..e95a8ba 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -14391,7 +14391,6 @@ M: Wolfram Sang <wsa+renesas@sang-engineering.com> L: linux-mmc@vger.kernel.org S: Supported F: drivers/mmc/host/tmio_mmc* -F: drivers/mmc/host/renesas_sdhi* F: include/linux/mfd/tmio.h TMP401 HARDWARE MONITOR DRIVER diff --git a/arch/arm/configs/eseries_pxa_defconfig b/arch/arm/configs/eseries_pxa_defconfig index cd27d65..4dae42a9 100644 --- a/arch/arm/configs/eseries_pxa_defconfig +++ b/arch/arm/configs/eseries_pxa_defconfig @@ -93,7 +93,7 @@ CONFIG_SND_PXA2XX_SOC=m CONFIG_SND_PXA2XX_SOC_E800=m # CONFIG_USB_SUPPORT is not set CONFIG_MMC=y -CONFIG_MMC_TMIO=y +CONFIG_MMC_TMIO_ORIGINAL=y CONFIG_EXT2_FS=y CONFIG_EXT3_FS=m CONFIG_VFAT_FS=y diff --git a/arch/arm/configs/pxa_defconfig b/arch/arm/configs/pxa_defconfig index 5655a1c..5999d69 100644 --- a/arch/arm/configs/pxa_defconfig +++ b/arch/arm/configs/pxa_defconfig @@ -613,7 +613,7 @@ CONFIG_SDIO_UART=m CONFIG_MMC_PXA=m CONFIG_MMC_SDHCI=m CONFIG_MMC_SDHCI_PLTFM=m -CONFIG_MMC_TMIO=m +CONFIG_MMC_TMIO_ORIGINAL=m CONFIG_MMC_DW=m CONFIG_MMC_DW_EXYNOS=m CONFIG_NEW_LEDS=y diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig index 0581c19..eb2a127 100644 --- a/drivers/mmc/host/Kconfig +++ b/drivers/mmc/host/Kconfig @@ -581,21 +581,36 @@ config MMC_SDRICOH_CS To compile this driver as a module, choose M here: the module will be called sdricoh_cs. -config MMC_TMIO_CORE +config MMC_TMIO tristate -config MMC_TMIO +config MMC_TMIO_ORIGINAL tristate "Toshiba Mobile IO Controller (TMIO) MMC/SD function support" depends on MFD_TMIO || MFD_ASIC3 - select MMC_TMIO_CORE + select MMC_TMIO help This provides support for the SD/MMC cell found in TC6393XB, T7L66XB and also HTC ASIC3 +# Aliases during migration. +# Rename +# MMC_SDHI -> MMC_TMIO_SDHI +# MMC_SDHI_SYS_DMAC -> MMC_TMIO_SDHI_SYS_DMAC +# MMC_SDHI_INTERNAL_DMAC -> MMC_TMIO_SDHI_INTERNAL_DMAC +config MMC_TMIO_SDHI + tristate + +config MMC_TMIO_SDHI_SYS_DMAC + tristate + +config MMC_TMIO_SDHI_INTERNAL_DMAC + tristate + config MMC_SDHI tristate "Renesas SDHI SD/SDIO controller support" depends on SUPERH || ARCH_RENESAS || COMPILE_TEST - select MMC_TMIO_CORE + select MMC_TMIO + select MMC_TMIO_SDHI help This provides support for the SDHI SD/SDIO controller found in Renesas SuperH, ARM and ARM64 based SoCs @@ -603,6 +618,7 @@ config MMC_SDHI config MMC_SDHI_SYS_DMAC tristate "DMA for SDHI SD/SDIO controllers using SYS-DMAC" depends on MMC_SDHI + select MMC_TMIO_SDHI_SYS_DMAC default MMC_SDHI if (SUPERH || ARM) help This provides DMA support for SDHI SD/SDIO controllers @@ -613,6 +629,7 @@ config MMC_SDHI_INTERNAL_DMAC tristate "DMA for SDHI SD/SDIO controllers using on-chip bus mastering" depends on ARM64 || COMPILE_TEST depends on MMC_SDHI + select MMC_TMIO_SDHI_INTERNAL_DMAC default MMC_SDHI if ARM64 help This provides DMA support for SDHI SD/SDIO controllers diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile index 85dc132..5e8b80f 100644 --- a/drivers/mmc/host/Makefile +++ b/drivers/mmc/host/Makefile @@ -37,10 +37,10 @@ endif obj-$(CONFIG_MMC_S3C) += s3cmci.o obj-$(CONFIG_MMC_SDRICOH_CS) += sdricoh_cs.o obj-$(CONFIG_MMC_TMIO) += tmio_mmc.o -obj-$(CONFIG_MMC_TMIO_CORE) += tmio_mmc_core.o -obj-$(CONFIG_MMC_SDHI) += renesas_sdhi_core.o -obj-$(CONFIG_MMC_SDHI_SYS_DMAC) += renesas_sdhi_sys_dmac.o -obj-$(CONFIG_MMC_SDHI_INTERNAL_DMAC) += renesas_sdhi_internal_dmac.o +obj-$(CONFIG_MMC_TMIO_ORIGINAL) += tmio_mmc_original.o +obj-$(CONFIG_MMC_TMIO_SDHI) += tmio_mmc_sdhi.o +obj-$(CONFIG_MMC_TMIO_SDHI_SYS_DMAC) += tmio_mmc_sdhi_sys_dmac.o +obj-$(CONFIG_MMC_TMIO_SDHI_INTERNAL_DMAC) += tmio_mmc_sdhi_internal_dmac.o obj-$(CONFIG_MMC_CB710) += cb710-mmc.o obj-$(CONFIG_MMC_VIA_SDMMC) += via-sdmmc.o octeon-mmc-objs := cavium.o cavium-octeon.o diff --git a/drivers/mmc/host/tmio_mmc.c b/drivers/mmc/host/tmio_mmc.c index 43a2ea5..3080299 100644 --- a/drivers/mmc/host/tmio_mmc.c +++ b/drivers/mmc/host/tmio_mmc.c @@ -1,167 +1,1394 @@ /* - * Driver for the MMC / SD / SDIO cell found in: + * Driver for the MMC / SD / SDIO IP found in: * - * TC6393XB TC6391XB TC6387XB T7L66XB ASIC3 + * TC6393XB, TC6391XB, TC6387XB, T7L66XB, ASIC3, SH-Mobile SoCs * - * Copyright (C) 2017 Renesas Electronics Corporation + * Copyright (C) 2015-17 Renesas Electronics Corporation + * Copyright (C) 2016-17 Sang Engineering, Wolfram Sang * Copyright (C) 2017 Horms Solutions, Simon Horman + * Copyright (C) 2011 Guennadi Liakhovetski * Copyright (C) 2007 Ian Molton * Copyright (C) 2004 Ian Molton * * 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. + * + * This driver draws mainly on scattered spec sheets, Reverse engineering + * of the toshiba e800 SD driver and some parts of the 2.4 ASIC3 driver (4 bit + * support). (Further 4 bit support from a later datasheet). + * + * TODO: + * Investigate using a workqueue for PIO transfers + * Eliminate FIXMEs + * Better Power management + * Handle MMC errors better + * double buffer support + * */ +#include <linux/delay.h> #include <linux/device.h> -#include <linux/mfd/core.h> +#include <linux/highmem.h> +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/irq.h> #include <linux/mfd/tmio.h> +#include <linux/mmc/card.h> #include <linux/mmc/host.h> +#include <linux/mmc/mmc.h> +#include <linux/mmc/slot-gpio.h> #include <linux/module.h> #include <linux/pagemap.h> +#include <linux/platform_device.h> +#include <linux/pm_qos.h> +#include <linux/pm_runtime.h> +#include <linux/regulator/consumer.h> +#include <linux/mmc/sdio.h> #include <linux/scatterlist.h> +#include <linux/spinlock.h> +#include <linux/swiotlb.h> +#include <linux/workqueue.h> #include "tmio_mmc.h" -#ifdef CONFIG_PM_SLEEP -static int tmio_mmc_suspend(struct device *dev) +static inline void tmio_mmc_start_dma(struct tmio_mmc_host *host, + struct mmc_data *data) { - struct platform_device *pdev = to_platform_device(dev); - const struct mfd_cell *cell = mfd_get_cell(pdev); - int ret; + if (host->dma_ops) + host->dma_ops->start(host, data); +} - ret = pm_runtime_force_suspend(dev); +static inline void tmio_mmc_enable_dma(struct tmio_mmc_host *host, bool enable) +{ + if (host->dma_ops) + host->dma_ops->enable(host, enable); +} - /* Tell MFD core it can disable us now.*/ - if (!ret && cell->disable) - cell->disable(pdev); +static inline void tmio_mmc_request_dma(struct tmio_mmc_host *host, + struct tmio_mmc_data *pdata) +{ + if (host->dma_ops) { + host->dma_ops->request(host, pdata); + } else { + host->chan_tx = NULL; + host->chan_rx = NULL; + } +} - return ret; +static inline void tmio_mmc_release_dma(struct tmio_mmc_host *host) +{ + if (host->dma_ops) + host->dma_ops->release(host); } -static int tmio_mmc_resume(struct device *dev) +static inline void tmio_mmc_abort_dma(struct tmio_mmc_host *host) { - struct platform_device *pdev = to_platform_device(dev); - const struct mfd_cell *cell = mfd_get_cell(pdev); - int ret = 0; + if (host->dma_ops) + host->dma_ops->abort(host); +} - /* Tell the MFD core we are ready to be enabled */ - if (cell->resume) - ret = cell->resume(pdev); +static inline void tmio_mmc_dataend_dma(struct tmio_mmc_host *host) +{ + if (host->dma_ops) + host->dma_ops->dataend(host); +} - if (!ret) - ret = pm_runtime_force_resume(dev); +void tmio_mmc_enable_mmc_irqs(struct tmio_mmc_host *host, u32 i) +{ + host->sdcard_irq_mask &= ~(i & TMIO_MASK_IRQ); + sd_ctrl_write32_as_16_and_16(host, CTL_IRQ_MASK, host->sdcard_irq_mask); +} +EXPORT_SYMBOL_GPL(tmio_mmc_enable_mmc_irqs); - return ret; +void tmio_mmc_disable_mmc_irqs(struct tmio_mmc_host *host, u32 i) +{ + host->sdcard_irq_mask |= (i & TMIO_MASK_IRQ); + sd_ctrl_write32_as_16_and_16(host, CTL_IRQ_MASK, host->sdcard_irq_mask); } -#endif +EXPORT_SYMBOL_GPL(tmio_mmc_disable_mmc_irqs); -static int tmio_mmc_probe(struct platform_device *pdev) +static void tmio_mmc_ack_mmc_irqs(struct tmio_mmc_host *host, u32 i) { - const struct mfd_cell *cell = mfd_get_cell(pdev); - struct tmio_mmc_data *pdata; - struct tmio_mmc_host *host; - struct resource *res; - int ret = -EINVAL, irq; + sd_ctrl_write32_as_16_and_16(host, CTL_STATUS, ~i); +} + +static void tmio_mmc_init_sg(struct tmio_mmc_host *host, struct mmc_data *data) +{ + host->sg_len = data->sg_len; + host->sg_ptr = data->sg; + host->sg_orig = data->sg; + host->sg_off = 0; +} + +static int tmio_mmc_next_sg(struct tmio_mmc_host *host) +{ + host->sg_ptr = sg_next(host->sg_ptr); + host->sg_off = 0; + return --host->sg_len; +} + +#define CMDREQ_TIMEOUT 5000 + +static void tmio_mmc_enable_sdio_irq(struct mmc_host *mmc, int enable) +{ + struct tmio_mmc_host *host = mmc_priv(mmc); + + if (enable && !host->sdio_irq_enabled) { + u16 sdio_status; + + /* Keep device active while SDIO irq is enabled */ + pm_runtime_get_sync(mmc_dev(mmc)); + + host->sdio_irq_enabled = true; + host->sdio_irq_mask = TMIO_SDIO_MASK_ALL & ~TMIO_SDIO_STAT_IOIRQ; + + /* Clear obsolete interrupts before enabling */ + sdio_status = sd_ctrl_read16(host, CTL_SDIO_STATUS) & ~TMIO_SDIO_MASK_ALL; + if (host->pdata->flags & TMIO_MMC_SDIO_STATUS_SETBITS) + sdio_status |= TMIO_SDIO_SETBITS_MASK; + sd_ctrl_write16(host, CTL_SDIO_STATUS, sdio_status); + + sd_ctrl_write16(host, CTL_SDIO_IRQ_MASK, host->sdio_irq_mask); + } else if (!enable && host->sdio_irq_enabled) { + host->sdio_irq_mask = TMIO_SDIO_MASK_ALL; + sd_ctrl_write16(host, CTL_SDIO_IRQ_MASK, host->sdio_irq_mask); + + host->sdio_irq_enabled = false; + pm_runtime_mark_last_busy(mmc_dev(mmc)); + pm_runtime_put_autosuspend(mmc_dev(mmc)); + } +} + +static void tmio_mmc_clk_start(struct tmio_mmc_host *host) +{ + sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, CLK_CTL_SCLKEN | + sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL)); + + /* HW engineers overrode docs: no sleep needed on R-Car2+ */ + if (!(host->pdata->flags & TMIO_MMC_MIN_RCAR2)) + usleep_range(10000, 11000); + + if (host->pdata->flags & TMIO_MMC_HAVE_HIGH_REG) { + sd_ctrl_write16(host, CTL_CLK_AND_WAIT_CTL, 0x0100); + usleep_range(10000, 11000); + } +} + +static void tmio_mmc_clk_stop(struct tmio_mmc_host *host) +{ + if (host->pdata->flags & TMIO_MMC_HAVE_HIGH_REG) { + sd_ctrl_write16(host, CTL_CLK_AND_WAIT_CTL, 0x0000); + usleep_range(10000, 11000); + } + + sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, ~CLK_CTL_SCLKEN & + sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL)); + + /* HW engineers overrode docs: no sleep needed on R-Car2+ */ + if (!(host->pdata->flags & TMIO_MMC_MIN_RCAR2)) + usleep_range(10000, 11000); +} + +static void tmio_mmc_set_clock(struct tmio_mmc_host *host, + unsigned int new_clock) +{ + u32 clk = 0, clock; + + if (new_clock == 0) { + tmio_mmc_clk_stop(host); + return; + } + + if (host->clk_update) + clock = host->clk_update(host, new_clock) / 512; + else + clock = host->mmc->f_min; + + for (clk = 0x80000080; new_clock >= (clock << 1); clk >>= 1) + clock <<= 1; + + /* 1/1 clock is option */ + if ((host->pdata->flags & TMIO_MMC_CLK_ACTUAL) && ((clk >> 22) & 0x1)) + clk |= 0xff; + + if (host->set_clk_div) + host->set_clk_div(host->pdev, (clk >> 22) & 1); + + sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, ~CLK_CTL_SCLKEN & + sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL)); + sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, clk & CLK_CTL_DIV_MASK); + if (!(host->pdata->flags & TMIO_MMC_MIN_RCAR2)) + usleep_range(10000, 11000); + + tmio_mmc_clk_start(host); +} + +static void tmio_mmc_reset(struct tmio_mmc_host *host) +{ + /* FIXME - should we set stop clock reg here */ + sd_ctrl_write16(host, CTL_RESET_SD, 0x0000); + if (host->pdata->flags & TMIO_MMC_HAVE_HIGH_REG) + sd_ctrl_write16(host, CTL_RESET_SDIO, 0x0000); + usleep_range(10000, 11000); + sd_ctrl_write16(host, CTL_RESET_SD, 0x0001); + if (host->pdata->flags & TMIO_MMC_HAVE_HIGH_REG) + sd_ctrl_write16(host, CTL_RESET_SDIO, 0x0001); + usleep_range(10000, 11000); + + if (host->pdata->flags & TMIO_MMC_SDIO_IRQ) { + sd_ctrl_write16(host, CTL_SDIO_IRQ_MASK, host->sdio_irq_mask); + sd_ctrl_write16(host, CTL_TRANSACTION_CTL, 0x0001); + } + +} + +static void tmio_mmc_reset_work(struct work_struct *work) +{ + struct tmio_mmc_host *host = container_of(work, struct tmio_mmc_host, + delayed_reset_work.work); + struct mmc_request *mrq; + unsigned long flags; + + spin_lock_irqsave(&host->lock, flags); + mrq = host->mrq; + + /* + * is request already finished? Since we use a non-blocking + * cancel_delayed_work(), it can happen, that a .set_ios() call preempts + * us, so, have to check for IS_ERR(host->mrq) + */ + if (IS_ERR_OR_NULL(mrq) || + time_is_after_jiffies(host->last_req_ts + + msecs_to_jiffies(CMDREQ_TIMEOUT))) { + spin_unlock_irqrestore(&host->lock, flags); + return; + } + + dev_warn(&host->pdev->dev, + "timeout waiting for hardware interrupt (CMD%u)\n", + mrq->cmd->opcode); + + if (host->data) + host->data->error = -ETIMEDOUT; + else if (host->cmd) + host->cmd->error = -ETIMEDOUT; + else + mrq->cmd->error = -ETIMEDOUT; + + host->cmd = NULL; + host->data = NULL; + + spin_unlock_irqrestore(&host->lock, flags); + + tmio_mmc_reset(host); + + /* Ready for new calls */ + host->mrq = NULL; + + tmio_mmc_abort_dma(host); + mmc_request_done(host->mmc, mrq); +} + +/* These are the bitmasks the tmio chip requires to implement the MMC response + * types. Note that R1 and R6 are the same in this scheme. */ +#define APP_CMD 0x0040 +#define RESP_NONE 0x0300 +#define RESP_R1 0x0400 +#define RESP_R1B 0x0500 +#define RESP_R2 0x0600 +#define RESP_R3 0x0700 +#define DATA_PRESENT 0x0800 +#define TRANSFER_READ 0x1000 +#define TRANSFER_MULTI 0x2000 +#define SECURITY_CMD 0x4000 +#define NO_CMD12_ISSUE 0x4000 /* TMIO_MMC_HAVE_CMD12_CTRL */ + +static int tmio_mmc_start_command(struct tmio_mmc_host *host, + struct mmc_command *cmd) +{ + struct mmc_data *data = host->data; + int c = cmd->opcode; + u32 irq_mask = TMIO_MASK_CMD; + + switch (mmc_resp_type(cmd)) { + case MMC_RSP_NONE: c |= RESP_NONE; break; + case MMC_RSP_R1: + case MMC_RSP_R1_NO_CRC: + c |= RESP_R1; break; + case MMC_RSP_R1B: c |= RESP_R1B; break; + case MMC_RSP_R2: c |= RESP_R2; break; + case MMC_RSP_R3: c |= RESP_R3; break; + default: + pr_debug("Unknown response type %d\n", mmc_resp_type(cmd)); + return -EINVAL; + } + + host->cmd = cmd; + +/* FIXME - this seems to be ok commented out but the spec suggest this bit + * should be set when issuing app commands. + * if(cmd->flags & MMC_FLAG_ACMD) + * c |= APP_CMD; + */ + if (data) { + c |= DATA_PRESENT; + if (data->blocks > 1) { + sd_ctrl_write16(host, CTL_STOP_INTERNAL_ACTION, TMIO_STOP_SEC); + c |= TRANSFER_MULTI; + + /* + * Disable auto CMD12 at IO_RW_EXTENDED and + * SET_BLOCK_COUNT when doing multiple block transfer + */ + if ((host->pdata->flags & TMIO_MMC_HAVE_CMD12_CTRL) && + (cmd->opcode == SD_IO_RW_EXTENDED || host->mrq->sbc)) + c |= NO_CMD12_ISSUE; + } + if (data->flags & MMC_DATA_READ) + c |= TRANSFER_READ; + } + + tmio_mmc_enable_mmc_irqs(host, irq_mask); + + /* Fire off the command */ + sd_ctrl_write32_as_16_and_16(host, CTL_ARG_REG, cmd->arg); + sd_ctrl_write16(host, CTL_SD_CMD, c); + + return 0; +} + +static void tmio_mmc_transfer_data(struct tmio_mmc_host *host, + unsigned short *buf, + unsigned int count) +{ + int is_read = host->data->flags & MMC_DATA_READ; + u8 *buf8; + + /* + * Transfer the data + */ + if (host->pdata->flags & TMIO_MMC_32BIT_DATA_PORT) { + u32 data = 0; + u32 *buf32 = (u32 *)buf; + + if (is_read) + sd_ctrl_read32_rep(host, CTL_SD_DATA_PORT, buf32, + count >> 2); + else + sd_ctrl_write32_rep(host, CTL_SD_DATA_PORT, buf32, + count >> 2); + + /* if count was multiple of 4 */ + if (!(count & 0x3)) + return; + + buf32 += count >> 2; + count %= 4; + + if (is_read) { + sd_ctrl_read32_rep(host, CTL_SD_DATA_PORT, &data, 1); + memcpy(buf32, &data, count); + } else { + memcpy(&data, buf32, count); + sd_ctrl_write32_rep(host, CTL_SD_DATA_PORT, &data, 1); + } + + return; + } + + if (is_read) + sd_ctrl_read16_rep(host, CTL_SD_DATA_PORT, buf, count >> 1); + else + sd_ctrl_write16_rep(host, CTL_SD_DATA_PORT, buf, count >> 1); + + /* if count was even number */ + if (!(count & 0x1)) + return; + + /* if count was odd number */ + buf8 = (u8 *)(buf + (count >> 1)); + + /* + * FIXME + * + * driver and this function are assuming that + * it is used as little endian + */ + if (is_read) + *buf8 = sd_ctrl_read16(host, CTL_SD_DATA_PORT) & 0xff; + else + sd_ctrl_write16(host, CTL_SD_DATA_PORT, *buf8); +} + +/* + * This chip always returns (at least?) as much data as you ask for. + * I'm unsure what happens if you ask for less than a block. This should be + * looked into to ensure that a funny length read doesn't hose the controller. + */ +static void tmio_mmc_pio_irq(struct tmio_mmc_host *host) +{ + struct mmc_data *data = host->data; + void *sg_virt; + unsigned short *buf; + unsigned int count; + unsigned long flags; + + if ((host->chan_tx || host->chan_rx) && !host->force_pio) { + pr_err("PIO IRQ in DMA mode!\n"); + return; + } else if (!data) { + pr_debug("Spurious PIO IRQ\n"); + return; + } + + sg_virt = tmio_mmc_kmap_atomic(host->sg_ptr, &flags); + buf = (unsigned short *)(sg_virt + host->sg_off); + + count = host->sg_ptr->length - host->sg_off; + if (count > data->blksz) + count = data->blksz; + + pr_debug("count: %08x offset: %08x flags %08x\n", + count, host->sg_off, data->flags); + + /* Transfer the data */ + tmio_mmc_transfer_data(host, buf, count); + + host->sg_off += count; + + tmio_mmc_kunmap_atomic(host->sg_ptr, &flags, sg_virt); + + if (host->sg_off == host->sg_ptr->length) + tmio_mmc_next_sg(host); +} + +static void tmio_mmc_check_bounce_buffer(struct tmio_mmc_host *host) +{ + if (host->sg_ptr == &host->bounce_sg) { + unsigned long flags; + void *sg_vaddr = tmio_mmc_kmap_atomic(host->sg_orig, &flags); + + memcpy(sg_vaddr, host->bounce_buf, host->bounce_sg.length); + tmio_mmc_kunmap_atomic(host->sg_orig, &flags, sg_vaddr); + } +} + +/* needs to be called with host->lock held */ +void tmio_mmc_do_data_irq(struct tmio_mmc_host *host) +{ + struct mmc_data *data = host->data; + struct mmc_command *stop; + + host->data = NULL; + + if (!data) { + dev_warn(&host->pdev->dev, "Spurious data end IRQ\n"); + return; + } + stop = data->stop; + + /* FIXME - return correct transfer count on errors */ + if (!data->error) + data->bytes_xfered = data->blocks * data->blksz; + else + data->bytes_xfered = 0; + + pr_debug("Completed data request\n"); + + /* + * FIXME: other drivers allow an optional stop command of any given type + * which we dont do, as the chip can auto generate them. + * Perhaps we can be smarter about when to use auto CMD12 and + * only issue the auto request when we know this is the desired + * stop command, allowing fallback to the stop command the + * upper layers expect. For now, we do what works. + */ + + if (data->flags & MMC_DATA_READ) { + if (host->chan_rx && !host->force_pio) + tmio_mmc_check_bounce_buffer(host); + dev_dbg(&host->pdev->dev, "Complete Rx request %p\n", + host->mrq); + } else { + dev_dbg(&host->pdev->dev, "Complete Tx request %p\n", + host->mrq); + } + + if (stop && !host->mrq->sbc) { + if (stop->opcode != MMC_STOP_TRANSMISSION || stop->arg) + dev_err(&host->pdev->dev, "unsupported stop: CMD%u,0x%x. We did CMD12,0\n", + stop->opcode, stop->arg); + + /* fill in response from auto CMD12 */ + stop->resp[0] = sd_ctrl_read16_and_16_as_32(host, CTL_RESPONSE); + + sd_ctrl_write16(host, CTL_STOP_INTERNAL_ACTION, 0); + } + + schedule_work(&host->done); +} +EXPORT_SYMBOL_GPL(tmio_mmc_do_data_irq); + +static void tmio_mmc_data_irq(struct tmio_mmc_host *host, unsigned int stat) +{ + struct mmc_data *data; + + spin_lock(&host->lock); + data = host->data; + + if (!data) + goto out; + + if (stat & TMIO_STAT_CRCFAIL || stat & TMIO_STAT_STOPBIT_ERR || + stat & TMIO_STAT_TXUNDERRUN) + data->error = -EILSEQ; + if (host->chan_tx && (data->flags & MMC_DATA_WRITE) && !host->force_pio) { + u32 status = sd_ctrl_read16_and_16_as_32(host, CTL_STATUS); + bool done = false; + + /* + * Has all data been written out yet? Testing on SuperH showed, + * that in most cases the first interrupt comes already with the + * BUSY status bit clear, but on some operations, like mount or + * in the beginning of a write / sync / umount, there is one + * DATAEND interrupt with the BUSY bit set, in this cases + * waiting for one more interrupt fixes the problem. + */ + if (host->pdata->flags & TMIO_MMC_HAS_IDLE_WAIT) { + if (status & TMIO_STAT_SCLKDIVEN) + done = true; + } else { + if (!(status & TMIO_STAT_CMD_BUSY)) + done = true; + } + + if (done) { + tmio_mmc_disable_mmc_irqs(host, TMIO_STAT_DATAEND); + tmio_mmc_dataend_dma(host); + } + } else if (host->chan_rx && (data->flags & MMC_DATA_READ) && !host->force_pio) { + tmio_mmc_disable_mmc_irqs(host, TMIO_STAT_DATAEND); + tmio_mmc_dataend_dma(host); + } else { + tmio_mmc_do_data_irq(host); + tmio_mmc_disable_mmc_irqs(host, TMIO_MASK_READOP | TMIO_MASK_WRITEOP); + } +out: + spin_unlock(&host->lock); +} + +static void tmio_mmc_cmd_irq(struct tmio_mmc_host *host, unsigned int stat) +{ + struct mmc_command *cmd = host->cmd; + int i, addr; + + spin_lock(&host->lock); + + if (!host->cmd) { + pr_debug("Spurious CMD irq\n"); + goto out; + } + + /* This controller is sicker than the PXA one. Not only do we need to + * drop the top 8 bits of the first response word, we also need to + * modify the order of the response for short response command types. + */ + + for (i = 3, addr = CTL_RESPONSE ; i >= 0 ; i--, addr += 4) + cmd->resp[i] = sd_ctrl_read16_and_16_as_32(host, addr); + + if (cmd->flags & MMC_RSP_136) { + cmd->resp[0] = (cmd->resp[0] << 8) | (cmd->resp[1] >> 24); + cmd->resp[1] = (cmd->resp[1] << 8) | (cmd->resp[2] >> 24); + cmd->resp[2] = (cmd->resp[2] << 8) | (cmd->resp[3] >> 24); + cmd->resp[3] <<= 8; + } else if (cmd->flags & MMC_RSP_R3) { + cmd->resp[0] = cmd->resp[3]; + } + + if (stat & TMIO_STAT_CMDTIMEOUT) + cmd->error = -ETIMEDOUT; + else if ((stat & TMIO_STAT_CRCFAIL && cmd->flags & MMC_RSP_CRC) || + stat & TMIO_STAT_STOPBIT_ERR || + stat & TMIO_STAT_CMD_IDX_ERR) + cmd->error = -EILSEQ; + + /* If there is data to handle we enable data IRQs here, and + * we will ultimatley finish the request in the data_end handler. + * If theres no data or we encountered an error, finish now. + */ + if (host->data && (!cmd->error || cmd->error == -EILSEQ)) { + if (host->data->flags & MMC_DATA_READ) { + if (host->force_pio || !host->chan_rx) { + tmio_mmc_enable_mmc_irqs(host, TMIO_MASK_READOP); + } else { + tmio_mmc_disable_mmc_irqs(host, + TMIO_MASK_READOP); + tasklet_schedule(&host->dma_issue); + } + } else { + if (host->force_pio || !host->chan_tx) { + tmio_mmc_enable_mmc_irqs(host, TMIO_MASK_WRITEOP); + } else { + tmio_mmc_disable_mmc_irqs(host, + TMIO_MASK_WRITEOP); + tasklet_schedule(&host->dma_issue); + } + } + } else { + schedule_work(&host->done); + } + +out: + spin_unlock(&host->lock); +} + +static bool __tmio_mmc_card_detect_irq(struct tmio_mmc_host *host, + int ireg, int status) +{ + struct mmc_host *mmc = host->mmc; + + /* Card insert / remove attempts */ + if (ireg & (TMIO_STAT_CARD_INSERT | TMIO_STAT_CARD_REMOVE)) { + tmio_mmc_ack_mmc_irqs(host, TMIO_STAT_CARD_INSERT | + TMIO_STAT_CARD_REMOVE); + if ((((ireg & TMIO_STAT_CARD_REMOVE) && mmc->card) || + ((ireg & TMIO_STAT_CARD_INSERT) && !mmc->card)) && + !work_pending(&mmc->detect.work)) + mmc_detect_change(host->mmc, msecs_to_jiffies(100)); + return true; + } + + return false; +} + +static bool __tmio_mmc_sdcard_irq(struct tmio_mmc_host *host, int ireg, + int status) +{ + /* Command completion */ + if (ireg & (TMIO_STAT_CMDRESPEND | TMIO_STAT_CMDTIMEOUT)) { + tmio_mmc_ack_mmc_irqs(host, TMIO_STAT_CMDRESPEND | + TMIO_STAT_CMDTIMEOUT); + tmio_mmc_cmd_irq(host, status); + return true; + } + + /* Data transfer */ + if (ireg & (TMIO_STAT_RXRDY | TMIO_STAT_TXRQ)) { + tmio_mmc_ack_mmc_irqs(host, TMIO_STAT_RXRDY | TMIO_STAT_TXRQ); + tmio_mmc_pio_irq(host); + return true; + } + + /* Data transfer completion */ + if (ireg & TMIO_STAT_DATAEND) { + tmio_mmc_ack_mmc_irqs(host, TMIO_STAT_DATAEND); + tmio_mmc_data_irq(host, status); + return true; + } + + return false; +} + +static void __tmio_mmc_sdio_irq(struct tmio_mmc_host *host) +{ + struct mmc_host *mmc = host->mmc; + struct tmio_mmc_data *pdata = host->pdata; + unsigned int ireg, status; + unsigned int sdio_status; + + if (!(pdata->flags & TMIO_MMC_SDIO_IRQ)) + return; + + status = sd_ctrl_read16(host, CTL_SDIO_STATUS); + ireg = status & TMIO_SDIO_MASK_ALL & ~host->sdio_irq_mask; + + sdio_status = status & ~TMIO_SDIO_MASK_ALL; + if (pdata->flags & TMIO_MMC_SDIO_STATUS_SETBITS) + sdio_status |= TMIO_SDIO_SETBITS_MASK; + + sd_ctrl_write16(host, CTL_SDIO_STATUS, sdio_status); + + if (mmc->caps & MMC_CAP_SDIO_IRQ && ireg & TMIO_SDIO_STAT_IOIRQ) + mmc_signal_sdio_irq(mmc); +} + +irqreturn_t tmio_mmc_irq(int irq, void *devid) +{ + struct tmio_mmc_host *host = devid; + unsigned int ireg, status; + + status = sd_ctrl_read16_and_16_as_32(host, CTL_STATUS); + ireg = status & TMIO_MASK_IRQ & ~host->sdcard_irq_mask; + + /* Clear the status except the interrupt status */ + sd_ctrl_write32_as_16_and_16(host, CTL_STATUS, TMIO_MASK_IRQ); - if (pdev->num_resources != 2) + if (__tmio_mmc_card_detect_irq(host, ireg, status)) + return IRQ_HANDLED; + if (__tmio_mmc_sdcard_irq(host, ireg, status)) + return IRQ_HANDLED; + + __tmio_mmc_sdio_irq(host); + + return IRQ_HANDLED; +} +EXPORT_SYMBOL_GPL(tmio_mmc_irq); + +static int tmio_mmc_start_data(struct tmio_mmc_host *host, + struct mmc_data *data) +{ + struct tmio_mmc_data *pdata = host->pdata; + + pr_debug("setup data transfer: blocksize %08x nr_blocks %d\n", + data->blksz, data->blocks); + + /* Some hardware cannot perform 2 byte requests in 4/8 bit mode */ + if (host->mmc->ios.bus_width == MMC_BUS_WIDTH_4 || + host->mmc->ios.bus_width == MMC_BUS_WIDTH_8) { + int blksz_2bytes = pdata->flags & TMIO_MMC_BLKSZ_2BYTES; + + if (data->blksz < 2 || (data->blksz < 4 && !blksz_2bytes)) { + pr_err("%s: %d byte block unsupported in 4/8 bit mode\n", + mmc_hostname(host->mmc), data->blksz); + return -EINVAL; + } + } + + tmio_mmc_init_sg(host, data); + host->data = data; + host->force_pio = false; + + /* Set transfer length / blocksize */ + sd_ctrl_write16(host, CTL_SD_XFER_LEN, data->blksz); + sd_ctrl_write16(host, CTL_XFER_BLK_COUNT, data->blocks); + + tmio_mmc_start_dma(host, data); + + return 0; +} + +static void tmio_mmc_hw_reset(struct mmc_host *mmc) +{ + struct tmio_mmc_host *host = mmc_priv(mmc); + + if (host->hw_reset) + host->hw_reset(host); +} + +static int tmio_mmc_execute_tuning(struct mmc_host *mmc, u32 opcode) +{ + struct tmio_mmc_host *host = mmc_priv(mmc); + int i, ret = 0; + + if (!host->init_tuning || !host->select_tuning) + /* Tuning is not supported */ goto out; - pdata = pdev->dev.platform_data; - if (!pdata || !pdata->hclk) + host->tap_num = host->init_tuning(host); + if (!host->tap_num) + /* Tuning is not supported */ goto out; - irq = platform_get_irq(pdev, 0); - if (irq < 0) { - ret = irq; + if (host->tap_num * 2 >= sizeof(host->taps) * BITS_PER_BYTE) { + dev_warn_once(&host->pdev->dev, + "Too many taps, skipping tuning. Please consider updating size of taps field of tmio_mmc_host\n"); goto out; } - /* Tell the MFD core we are ready to be enabled */ - if (cell->enable) { - ret = cell->enable(pdev); - if (ret) + bitmap_zero(host->taps, host->tap_num * 2); + + /* Issue CMD19 twice for each tap */ + for (i = 0; i < 2 * host->tap_num; i++) { + if (host->prepare_tuning) + host->prepare_tuning(host, i % host->tap_num); + + ret = mmc_send_tuning(mmc, opcode, NULL); + if (ret && ret != -EILSEQ) goto out; + if (ret == 0) + set_bit(i, host->taps); + + usleep_range(1000, 1200); } + ret = host->select_tuning(host); + +out: + if (ret < 0) { + dev_warn(&host->pdev->dev, "Tuning procedure failed\n"); + tmio_mmc_hw_reset(mmc); + } + + return ret; +} + +static void tmio_process_mrq(struct tmio_mmc_host *host, + struct mmc_request *mrq) +{ + struct mmc_command *cmd; + int ret; + + if (mrq->sbc && host->cmd != mrq->sbc) { + cmd = mrq->sbc; + } else { + cmd = mrq->cmd; + if (mrq->data) { + ret = tmio_mmc_start_data(host, mrq->data); + if (ret) + goto fail; + } + } + + ret = tmio_mmc_start_command(host, cmd); + if (ret) + goto fail; + + schedule_delayed_work(&host->delayed_reset_work, + msecs_to_jiffies(CMDREQ_TIMEOUT)); + return; + +fail: + host->mrq = NULL; + mrq->cmd->error = ret; + mmc_request_done(host->mmc, mrq); +} + +/* Process requests from the MMC layer */ +static void tmio_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq) +{ + struct tmio_mmc_host *host = mmc_priv(mmc); + unsigned long flags; + + spin_lock_irqsave(&host->lock, flags); + + if (host->mrq) { + pr_debug("request not null\n"); + if (IS_ERR(host->mrq)) { + spin_unlock_irqrestore(&host->lock, flags); + mrq->cmd->error = -EAGAIN; + mmc_request_done(mmc, mrq); + return; + } + } + + host->last_req_ts = jiffies; + wmb(); + host->mrq = mrq; + + spin_unlock_irqrestore(&host->lock, flags); + + tmio_process_mrq(host, mrq); +} + +static void tmio_mmc_finish_request(struct tmio_mmc_host *host) +{ + struct mmc_request *mrq; + unsigned long flags; + + spin_lock_irqsave(&host->lock, flags); + + mrq = host->mrq; + if (IS_ERR_OR_NULL(mrq)) { + spin_unlock_irqrestore(&host->lock, flags); + return; + } + + /* If not SET_BLOCK_COUNT, clear old data */ + if (host->cmd != mrq->sbc) { + host->cmd = NULL; + host->data = NULL; + host->mrq = NULL; + } + + cancel_delayed_work(&host->delayed_reset_work); + + spin_unlock_irqrestore(&host->lock, flags); + + if (mrq->cmd->error || (mrq->data && mrq->data->error)) + tmio_mmc_abort_dma(host); + + if (host->check_scc_error) + host->check_scc_error(host); + + /* If SET_BLOCK_COUNT, continue with main command */ + if (host->mrq && !mrq->cmd->error) { + tmio_process_mrq(host, mrq); + return; + } + + mmc_request_done(host->mmc, mrq); +} + +static void tmio_mmc_done_work(struct work_struct *work) +{ + struct tmio_mmc_host *host = container_of(work, struct tmio_mmc_host, + done); + tmio_mmc_finish_request(host); +} + +static void tmio_mmc_power_on(struct tmio_mmc_host *host, unsigned short vdd) +{ + struct mmc_host *mmc = host->mmc; + int ret = 0; + + /* .set_ios() is returning void, so, no chance to report an error */ + + if (host->set_pwr) + host->set_pwr(host->pdev, 1); + + if (!IS_ERR(mmc->supply.vmmc)) { + ret = mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, vdd); + /* + * Attention: empiric value. With a b43 WiFi SDIO card this + * delay proved necessary for reliable card-insertion probing. + * 100us were not enough. Is this the same 140us delay, as in + * tmio_mmc_set_ios()? + */ + usleep_range(200, 300); + } + /* + * It seems, VccQ should be switched on after Vcc, this is also what the + * omap_hsmmc.c driver does. + */ + if (!IS_ERR(mmc->supply.vqmmc) && !ret) { + ret = regulator_enable(mmc->supply.vqmmc); + usleep_range(200, 300); + } + + if (ret < 0) + dev_dbg(&host->pdev->dev, "Regulators failed to power up: %d\n", + ret); +} + +static void tmio_mmc_power_off(struct tmio_mmc_host *host) +{ + struct mmc_host *mmc = host->mmc; + + if (!IS_ERR(mmc->supply.vqmmc)) + regulator_disable(mmc->supply.vqmmc); + + if (!IS_ERR(mmc->supply.vmmc)) + mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, 0); + + if (host->set_pwr) + host->set_pwr(host->pdev, 0); +} + +static void tmio_mmc_set_bus_width(struct tmio_mmc_host *host, + unsigned char bus_width) +{ + u16 reg = sd_ctrl_read16(host, CTL_SD_MEM_CARD_OPT) + & ~(CARD_OPT_WIDTH | CARD_OPT_WIDTH8); + + /* reg now applies to MMC_BUS_WIDTH_4 */ + if (bus_width == MMC_BUS_WIDTH_1) + reg |= CARD_OPT_WIDTH; + else if (bus_width == MMC_BUS_WIDTH_8) + reg |= CARD_OPT_WIDTH8; + + sd_ctrl_write16(host, CTL_SD_MEM_CARD_OPT, reg); +} + +/* Set MMC clock / power. + * Note: This controller uses a simple divider scheme therefore it cannot + * run a MMC card at full speed (20MHz). The max clock is 24MHz on SD, but as + * MMC wont run that fast, it has to be clocked at 12MHz which is the next + * slowest setting. + */ +static void tmio_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) +{ + struct tmio_mmc_host *host = mmc_priv(mmc); + struct device *dev = &host->pdev->dev; + unsigned long flags; + + mutex_lock(&host->ios_lock); + + spin_lock_irqsave(&host->lock, flags); + if (host->mrq) { + if (IS_ERR(host->mrq)) { + dev_dbg(dev, + "%s.%d: concurrent .set_ios(), clk %u, mode %u\n", + current->comm, task_pid_nr(current), + ios->clock, ios->power_mode); + host->mrq = ERR_PTR(-EINTR); + } else { + dev_dbg(dev, + "%s.%d: CMD%u active since %lu, now %lu!\n", + current->comm, task_pid_nr(current), + host->mrq->cmd->opcode, host->last_req_ts, + jiffies); + } + spin_unlock_irqrestore(&host->lock, flags); + + mutex_unlock(&host->ios_lock); + return; + } + + host->mrq = ERR_PTR(-EBUSY); + + spin_unlock_irqrestore(&host->lock, flags); + + switch (ios->power_mode) { + case MMC_POWER_OFF: + tmio_mmc_power_off(host); + tmio_mmc_clk_stop(host); + break; + case MMC_POWER_UP: + tmio_mmc_power_on(host, ios->vdd); + tmio_mmc_set_clock(host, ios->clock); + tmio_mmc_set_bus_width(host, ios->bus_width); + break; + case MMC_POWER_ON: + tmio_mmc_set_clock(host, ios->clock); + tmio_mmc_set_bus_width(host, ios->bus_width); + break; + } + + /* Let things settle. delay taken from winCE driver */ + usleep_range(140, 200); + if (PTR_ERR(host->mrq) == -EINTR) + dev_dbg(&host->pdev->dev, + "%s.%d: IOS interrupted: clk %u, mode %u", + current->comm, task_pid_nr(current), + ios->clock, ios->power_mode); + host->mrq = NULL; + + host->clk_cache = ios->clock; + + mutex_unlock(&host->ios_lock); +} + +static int tmio_mmc_get_ro(struct mmc_host *mmc) +{ + struct tmio_mmc_host *host = mmc_priv(mmc); + + return !(sd_ctrl_read16_and_16_as_32(host, CTL_STATUS) & + TMIO_STAT_WRPROTECT); +} + +static int tmio_mmc_get_cd(struct mmc_host *mmc) +{ + struct tmio_mmc_host *host = mmc_priv(mmc); + + return !!(sd_ctrl_read16_and_16_as_32(host, CTL_STATUS) & + TMIO_STAT_SIGSTATE); +} + +static int tmio_multi_io_quirk(struct mmc_card *card, + unsigned int direction, int blk_size) +{ + struct tmio_mmc_host *host = mmc_priv(card->host); + + if (host->multi_io_quirk) + return host->multi_io_quirk(card, direction, blk_size); + + return blk_size; +} + +static const struct mmc_host_ops tmio_mmc_ops = { + .request = tmio_mmc_request, + .set_ios = tmio_mmc_set_ios, + .get_ro = tmio_mmc_get_ro, + .get_cd = tmio_mmc_get_cd, + .enable_sdio_irq = tmio_mmc_enable_sdio_irq, + .multi_io_quirk = tmio_multi_io_quirk, + .hw_reset = tmio_mmc_hw_reset, + .execute_tuning = tmio_mmc_execute_tuning, +}; + +static int tmio_mmc_init_ocr(struct tmio_mmc_host *host) +{ + struct tmio_mmc_data *pdata = host->pdata; + struct mmc_host *mmc = host->mmc; + int err; + + err = mmc_regulator_get_supply(mmc); + if (err) + return err; + + /* use ocr_mask if no regulator */ + if (!mmc->ocr_avail) + mmc->ocr_avail = pdata->ocr_mask; + + /* + * try again. + * There is possibility that regulator has not been probed + */ + if (!mmc->ocr_avail) + return -EPROBE_DEFER; + + return 0; +} + +static void tmio_mmc_of_parse(struct platform_device *pdev, + struct mmc_host *mmc) +{ + const struct device_node *np = pdev->dev.of_node; + + if (!np) + return; + + /* + * DEPRECATED: + * For new platforms, please use "disable-wp" instead of + * "toshiba,mmc-wrprotect-disable" + */ + if (of_get_property(np, "toshiba,mmc-wrprotect-disable", NULL)) + mmc->caps2 |= MMC_CAP2_NO_WRITE_PROTECT; +} + +struct tmio_mmc_host *tmio_mmc_host_alloc(struct platform_device *pdev, + struct tmio_mmc_data *pdata) +{ + struct tmio_mmc_host *host; + struct mmc_host *mmc; + struct resource *res; + void __iomem *ctl; + int ret; + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!res) { - ret = -EINVAL; - goto cell_disable; + ctl = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(ctl)) + return ERR_CAST(ctl); + + mmc = mmc_alloc_host(sizeof(struct tmio_mmc_host), &pdev->dev); + if (!mmc) + return ERR_PTR(-ENOMEM); + + host = mmc_priv(mmc); + host->ctl = ctl; + host->mmc = mmc; + host->pdev = pdev; + host->pdata = pdata; + host->ops = tmio_mmc_ops; + mmc->ops = &host->ops; + + ret = mmc_of_parse(host->mmc); + if (ret) { + host = ERR_PTR(ret); + goto free; + } + + tmio_mmc_of_parse(pdev, mmc); + + platform_set_drvdata(pdev, host); + + return host; +free: + mmc_free_host(mmc); + + return host; +} +EXPORT_SYMBOL_GPL(tmio_mmc_host_alloc); + +void tmio_mmc_host_free(struct tmio_mmc_host *host) +{ + mmc_free_host(host->mmc); +} +EXPORT_SYMBOL_GPL(tmio_mmc_host_free); + +int tmio_mmc_host_probe(struct tmio_mmc_host *_host) +{ + struct platform_device *pdev = _host->pdev; + struct tmio_mmc_data *pdata = _host->pdata; + struct mmc_host *mmc = _host->mmc; + int ret; + + /* + * Check the sanity of mmc->f_min to prevent tmio_mmc_set_clock() from + * looping forever... + */ + if (mmc->f_min == 0) + return -EINVAL; + + if (!(pdata->flags & TMIO_MMC_HAS_IDLE_WAIT)) + _host->write16_hook = NULL; + + _host->set_pwr = pdata->set_pwr; + _host->set_clk_div = pdata->set_clk_div; + + ret = tmio_mmc_init_ocr(_host); + if (ret < 0) + return ret; + + if (pdata->flags & TMIO_MMC_USE_GPIO_CD) { + ret = mmc_gpio_request_cd(mmc, pdata->cd_gpio, 0); + if (ret) + return ret; } - pdata->flags |= TMIO_MMC_HAVE_HIGH_REG; + mmc->caps |= MMC_CAP_4_BIT_DATA | pdata->capabilities; + mmc->caps2 |= pdata->capabilities2; + mmc->max_segs = pdata->max_segs ? : 32; + mmc->max_blk_size = 512; + mmc->max_blk_count = pdata->max_blk_count ? : + (PAGE_SIZE / mmc->max_blk_size) * mmc->max_segs; + mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count; + /* + * Since swiotlb has memory size limitation, this will calculate + * the maximum size locally (because we don't have any APIs for it now) + * and check the current max_req_size. And then, this will update + * the max_req_size if needed as a workaround. + */ + if (swiotlb_max_segment()) { + unsigned int max_size = (1 << IO_TLB_SHIFT) * IO_TLB_SEGSIZE; - host = tmio_mmc_host_alloc(pdev, pdata); - if (IS_ERR(host)) { - ret = PTR_ERR(host); - goto cell_disable; + if (mmc->max_req_size > max_size) + mmc->max_req_size = max_size; } + mmc->max_seg_size = mmc->max_req_size; - /* SD control register space size is 0x200, 0x400 for bus_shift=1 */ - host->bus_shift = resource_size(res) >> 10; + if (mmc_can_gpio_ro(mmc)) + _host->ops.get_ro = mmc_gpio_get_ro; - host->mmc->f_max = pdata->hclk; - host->mmc->f_min = pdata->hclk / 512; + if (mmc_can_gpio_cd(mmc)) + _host->ops.get_cd = mmc_gpio_get_cd; - ret = tmio_mmc_host_probe(host); - if (ret) - goto host_free; + _host->native_hotplug = !(mmc_can_gpio_cd(mmc) || + mmc->caps & MMC_CAP_NEEDS_POLL || + !mmc_card_is_removable(mmc)); + + /* + * On Gen2+, eMMC with NONREMOVABLE currently fails because native + * hotplug gets disabled. It seems RuntimePM related yet we need further + * research. Since we are planning a PM overhaul anyway, let's enforce + * for now the device being active by enabling native hotplug always. + */ + if (pdata->flags & TMIO_MMC_MIN_RCAR2) + _host->native_hotplug = true; + + /* + * While using internal tmio hardware logic for card detection, we need + * to ensure it stays powered for it to work. + */ + if (_host->native_hotplug) + pm_runtime_get_noresume(&pdev->dev); + + _host->sdio_irq_enabled = false; + if (pdata->flags & TMIO_MMC_SDIO_IRQ) + _host->sdio_irq_mask = TMIO_SDIO_MASK_ALL; - ret = devm_request_irq(&pdev->dev, irq, tmio_mmc_irq, - IRQF_TRIGGER_FALLING, - dev_name(&pdev->dev), host); + tmio_mmc_clk_stop(_host); + tmio_mmc_reset(_host); + + _host->sdcard_irq_mask = sd_ctrl_read16_and_16_as_32(_host, CTL_IRQ_MASK); + tmio_mmc_disable_mmc_irqs(_host, TMIO_MASK_ALL); + + if (_host->native_hotplug) + tmio_mmc_enable_mmc_irqs(_host, + TMIO_STAT_CARD_REMOVE | TMIO_STAT_CARD_INSERT); + + spin_lock_init(&_host->lock); + mutex_init(&_host->ios_lock); + + /* Init delayed work for request timeouts */ + INIT_DELAYED_WORK(&_host->delayed_reset_work, tmio_mmc_reset_work); + INIT_WORK(&_host->done, tmio_mmc_done_work); + + /* See if we also get DMA */ + tmio_mmc_request_dma(_host, pdata); + + pm_runtime_set_active(&pdev->dev); + pm_runtime_set_autosuspend_delay(&pdev->dev, 50); + pm_runtime_use_autosuspend(&pdev->dev); + pm_runtime_enable(&pdev->dev); + + ret = mmc_add_host(mmc); if (ret) - goto host_remove; + goto remove_host; - pr_info("%s at 0x%08lx irq %d\n", mmc_hostname(host->mmc), - (unsigned long)host->ctl, irq); + dev_pm_qos_expose_latency_limit(&pdev->dev, 100); return 0; -host_remove: - tmio_mmc_host_remove(host); -host_free: - tmio_mmc_host_free(host); -cell_disable: - if (cell->disable) - cell->disable(pdev); -out: +remove_host: + tmio_mmc_host_remove(_host); return ret; } +EXPORT_SYMBOL_GPL(tmio_mmc_host_probe); + +void tmio_mmc_host_remove(struct tmio_mmc_host *host) +{ + struct platform_device *pdev = host->pdev; + struct mmc_host *mmc = host->mmc; + + if (host->pdata->flags & TMIO_MMC_SDIO_IRQ) + sd_ctrl_write16(host, CTL_TRANSACTION_CTL, 0x0000); + + if (!host->native_hotplug) + pm_runtime_get_sync(&pdev->dev); + + dev_pm_qos_hide_latency_limit(&pdev->dev); + + mmc_remove_host(mmc); + cancel_work_sync(&host->done); + cancel_delayed_work_sync(&host->delayed_reset_work); + tmio_mmc_release_dma(host); + + pm_runtime_put_sync(&pdev->dev); + pm_runtime_disable(&pdev->dev); +} +EXPORT_SYMBOL_GPL(tmio_mmc_host_remove); -static int tmio_mmc_remove(struct platform_device *pdev) +#ifdef CONFIG_PM +static int tmio_mmc_clk_enable(struct tmio_mmc_host *host) { - const struct mfd_cell *cell = mfd_get_cell(pdev); - struct tmio_mmc_host *host = platform_get_drvdata(pdev); + if (!host->clk_enable) + return -ENOTSUPP; + + return host->clk_enable(host); +} + +static void tmio_mmc_clk_disable(struct tmio_mmc_host *host) +{ + if (host->clk_disable) + host->clk_disable(host); +} + +int tmio_mmc_host_runtime_suspend(struct device *dev) +{ + struct tmio_mmc_host *host = dev_get_drvdata(dev); + + tmio_mmc_disable_mmc_irqs(host, TMIO_MASK_ALL); + + if (host->clk_cache) + tmio_mmc_clk_stop(host); - tmio_mmc_host_remove(host); - if (cell->disable) - cell->disable(pdev); + tmio_mmc_clk_disable(host); return 0; } +EXPORT_SYMBOL_GPL(tmio_mmc_host_runtime_suspend); -/* ------------------- device registration ----------------------- */ +static bool tmio_mmc_can_retune(struct tmio_mmc_host *host) +{ + return host->tap_num && mmc_can_retune(host->mmc); +} -static const struct dev_pm_ops tmio_mmc_dev_pm_ops = { - SET_SYSTEM_SLEEP_PM_OPS(tmio_mmc_suspend, tmio_mmc_resume) - SET_RUNTIME_PM_OPS(tmio_mmc_host_runtime_suspend, - tmio_mmc_host_runtime_resume, NULL) -}; +int tmio_mmc_host_runtime_resume(struct device *dev) +{ + struct tmio_mmc_host *host = dev_get_drvdata(dev); -static struct platform_driver tmio_mmc_driver = { - .driver = { - .name = "tmio-mmc", - .pm = &tmio_mmc_dev_pm_ops, - }, - .probe = tmio_mmc_probe, - .remove = tmio_mmc_remove, -}; + tmio_mmc_reset(host); + tmio_mmc_clk_enable(host); + + if (host->clk_cache) + tmio_mmc_set_clock(host, host->clk_cache); -module_platform_driver(tmio_mmc_driver); + if (host->native_hotplug) + tmio_mmc_enable_mmc_irqs(host, + TMIO_STAT_CARD_REMOVE | TMIO_STAT_CARD_INSERT); + + tmio_mmc_enable_dma(host, true); + + if (tmio_mmc_can_retune(host) && host->select_tuning(host)) + dev_warn(&host->pdev->dev, "Tuning selection failed\n"); + + return 0; +} +EXPORT_SYMBOL_GPL(tmio_mmc_host_runtime_resume); +#endif -MODULE_DESCRIPTION("Toshiba TMIO SD/MMC driver"); -MODULE_AUTHOR("Ian Molton <spyro@f2s.com>"); MODULE_LICENSE("GPL v2"); -MODULE_ALIAS("platform:tmio-mmc"); diff --git a/drivers/mmc/host/tmio_mmc_core.c b/drivers/mmc/host/tmio_mmc_core.c deleted file mode 100644 index 3080299..0000000 --- a/drivers/mmc/host/tmio_mmc_core.c +++ /dev/null @@ -1,1394 +0,0 @@ -/* - * Driver for the MMC / SD / SDIO IP found in: - * - * TC6393XB, TC6391XB, TC6387XB, T7L66XB, ASIC3, SH-Mobile SoCs - * - * Copyright (C) 2015-17 Renesas Electronics Corporation - * Copyright (C) 2016-17 Sang Engineering, Wolfram Sang - * Copyright (C) 2017 Horms Solutions, Simon Horman - * Copyright (C) 2011 Guennadi Liakhovetski - * Copyright (C) 2007 Ian Molton - * Copyright (C) 2004 Ian Molton - * - * 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. - * - * This driver draws mainly on scattered spec sheets, Reverse engineering - * of the toshiba e800 SD driver and some parts of the 2.4 ASIC3 driver (4 bit - * support). (Further 4 bit support from a later datasheet). - * - * TODO: - * Investigate using a workqueue for PIO transfers - * Eliminate FIXMEs - * Better Power management - * Handle MMC errors better - * double buffer support - * - */ - -#include <linux/delay.h> -#include <linux/device.h> -#include <linux/highmem.h> -#include <linux/interrupt.h> -#include <linux/io.h> -#include <linux/irq.h> -#include <linux/mfd/tmio.h> -#include <linux/mmc/card.h> -#include <linux/mmc/host.h> -#include <linux/mmc/mmc.h> -#include <linux/mmc/slot-gpio.h> -#include <linux/module.h> -#include <linux/pagemap.h> -#include <linux/platform_device.h> -#include <linux/pm_qos.h> -#include <linux/pm_runtime.h> -#include <linux/regulator/consumer.h> -#include <linux/mmc/sdio.h> -#include <linux/scatterlist.h> -#include <linux/spinlock.h> -#include <linux/swiotlb.h> -#include <linux/workqueue.h> - -#include "tmio_mmc.h" - -static inline void tmio_mmc_start_dma(struct tmio_mmc_host *host, - struct mmc_data *data) -{ - if (host->dma_ops) - host->dma_ops->start(host, data); -} - -static inline void tmio_mmc_enable_dma(struct tmio_mmc_host *host, bool enable) -{ - if (host->dma_ops) - host->dma_ops->enable(host, enable); -} - -static inline void tmio_mmc_request_dma(struct tmio_mmc_host *host, - struct tmio_mmc_data *pdata) -{ - if (host->dma_ops) { - host->dma_ops->request(host, pdata); - } else { - host->chan_tx = NULL; - host->chan_rx = NULL; - } -} - -static inline void tmio_mmc_release_dma(struct tmio_mmc_host *host) -{ - if (host->dma_ops) - host->dma_ops->release(host); -} - -static inline void tmio_mmc_abort_dma(struct tmio_mmc_host *host) -{ - if (host->dma_ops) - host->dma_ops->abort(host); -} - -static inline void tmio_mmc_dataend_dma(struct tmio_mmc_host *host) -{ - if (host->dma_ops) - host->dma_ops->dataend(host); -} - -void tmio_mmc_enable_mmc_irqs(struct tmio_mmc_host *host, u32 i) -{ - host->sdcard_irq_mask &= ~(i & TMIO_MASK_IRQ); - sd_ctrl_write32_as_16_and_16(host, CTL_IRQ_MASK, host->sdcard_irq_mask); -} -EXPORT_SYMBOL_GPL(tmio_mmc_enable_mmc_irqs); - -void tmio_mmc_disable_mmc_irqs(struct tmio_mmc_host *host, u32 i) -{ - host->sdcard_irq_mask |= (i & TMIO_MASK_IRQ); - sd_ctrl_write32_as_16_and_16(host, CTL_IRQ_MASK, host->sdcard_irq_mask); -} -EXPORT_SYMBOL_GPL(tmio_mmc_disable_mmc_irqs); - -static void tmio_mmc_ack_mmc_irqs(struct tmio_mmc_host *host, u32 i) -{ - sd_ctrl_write32_as_16_and_16(host, CTL_STATUS, ~i); -} - -static void tmio_mmc_init_sg(struct tmio_mmc_host *host, struct mmc_data *data) -{ - host->sg_len = data->sg_len; - host->sg_ptr = data->sg; - host->sg_orig = data->sg; - host->sg_off = 0; -} - -static int tmio_mmc_next_sg(struct tmio_mmc_host *host) -{ - host->sg_ptr = sg_next(host->sg_ptr); - host->sg_off = 0; - return --host->sg_len; -} - -#define CMDREQ_TIMEOUT 5000 - -static void tmio_mmc_enable_sdio_irq(struct mmc_host *mmc, int enable) -{ - struct tmio_mmc_host *host = mmc_priv(mmc); - - if (enable && !host->sdio_irq_enabled) { - u16 sdio_status; - - /* Keep device active while SDIO irq is enabled */ - pm_runtime_get_sync(mmc_dev(mmc)); - - host->sdio_irq_enabled = true; - host->sdio_irq_mask = TMIO_SDIO_MASK_ALL & ~TMIO_SDIO_STAT_IOIRQ; - - /* Clear obsolete interrupts before enabling */ - sdio_status = sd_ctrl_read16(host, CTL_SDIO_STATUS) & ~TMIO_SDIO_MASK_ALL; - if (host->pdata->flags & TMIO_MMC_SDIO_STATUS_SETBITS) - sdio_status |= TMIO_SDIO_SETBITS_MASK; - sd_ctrl_write16(host, CTL_SDIO_STATUS, sdio_status); - - sd_ctrl_write16(host, CTL_SDIO_IRQ_MASK, host->sdio_irq_mask); - } else if (!enable && host->sdio_irq_enabled) { - host->sdio_irq_mask = TMIO_SDIO_MASK_ALL; - sd_ctrl_write16(host, CTL_SDIO_IRQ_MASK, host->sdio_irq_mask); - - host->sdio_irq_enabled = false; - pm_runtime_mark_last_busy(mmc_dev(mmc)); - pm_runtime_put_autosuspend(mmc_dev(mmc)); - } -} - -static void tmio_mmc_clk_start(struct tmio_mmc_host *host) -{ - sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, CLK_CTL_SCLKEN | - sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL)); - - /* HW engineers overrode docs: no sleep needed on R-Car2+ */ - if (!(host->pdata->flags & TMIO_MMC_MIN_RCAR2)) - usleep_range(10000, 11000); - - if (host->pdata->flags & TMIO_MMC_HAVE_HIGH_REG) { - sd_ctrl_write16(host, CTL_CLK_AND_WAIT_CTL, 0x0100); - usleep_range(10000, 11000); - } -} - -static void tmio_mmc_clk_stop(struct tmio_mmc_host *host) -{ - if (host->pdata->flags & TMIO_MMC_HAVE_HIGH_REG) { - sd_ctrl_write16(host, CTL_CLK_AND_WAIT_CTL, 0x0000); - usleep_range(10000, 11000); - } - - sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, ~CLK_CTL_SCLKEN & - sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL)); - - /* HW engineers overrode docs: no sleep needed on R-Car2+ */ - if (!(host->pdata->flags & TMIO_MMC_MIN_RCAR2)) - usleep_range(10000, 11000); -} - -static void tmio_mmc_set_clock(struct tmio_mmc_host *host, - unsigned int new_clock) -{ - u32 clk = 0, clock; - - if (new_clock == 0) { - tmio_mmc_clk_stop(host); - return; - } - - if (host->clk_update) - clock = host->clk_update(host, new_clock) / 512; - else - clock = host->mmc->f_min; - - for (clk = 0x80000080; new_clock >= (clock << 1); clk >>= 1) - clock <<= 1; - - /* 1/1 clock is option */ - if ((host->pdata->flags & TMIO_MMC_CLK_ACTUAL) && ((clk >> 22) & 0x1)) - clk |= 0xff; - - if (host->set_clk_div) - host->set_clk_div(host->pdev, (clk >> 22) & 1); - - sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, ~CLK_CTL_SCLKEN & - sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL)); - sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, clk & CLK_CTL_DIV_MASK); - if (!(host->pdata->flags & TMIO_MMC_MIN_RCAR2)) - usleep_range(10000, 11000); - - tmio_mmc_clk_start(host); -} - -static void tmio_mmc_reset(struct tmio_mmc_host *host) -{ - /* FIXME - should we set stop clock reg here */ - sd_ctrl_write16(host, CTL_RESET_SD, 0x0000); - if (host->pdata->flags & TMIO_MMC_HAVE_HIGH_REG) - sd_ctrl_write16(host, CTL_RESET_SDIO, 0x0000); - usleep_range(10000, 11000); - sd_ctrl_write16(host, CTL_RESET_SD, 0x0001); - if (host->pdata->flags & TMIO_MMC_HAVE_HIGH_REG) - sd_ctrl_write16(host, CTL_RESET_SDIO, 0x0001); - usleep_range(10000, 11000); - - if (host->pdata->flags & TMIO_MMC_SDIO_IRQ) { - sd_ctrl_write16(host, CTL_SDIO_IRQ_MASK, host->sdio_irq_mask); - sd_ctrl_write16(host, CTL_TRANSACTION_CTL, 0x0001); - } - -} - -static void tmio_mmc_reset_work(struct work_struct *work) -{ - struct tmio_mmc_host *host = container_of(work, struct tmio_mmc_host, - delayed_reset_work.work); - struct mmc_request *mrq; - unsigned long flags; - - spin_lock_irqsave(&host->lock, flags); - mrq = host->mrq; - - /* - * is request already finished? Since we use a non-blocking - * cancel_delayed_work(), it can happen, that a .set_ios() call preempts - * us, so, have to check for IS_ERR(host->mrq) - */ - if (IS_ERR_OR_NULL(mrq) || - time_is_after_jiffies(host->last_req_ts + - msecs_to_jiffies(CMDREQ_TIMEOUT))) { - spin_unlock_irqrestore(&host->lock, flags); - return; - } - - dev_warn(&host->pdev->dev, - "timeout waiting for hardware interrupt (CMD%u)\n", - mrq->cmd->opcode); - - if (host->data) - host->data->error = -ETIMEDOUT; - else if (host->cmd) - host->cmd->error = -ETIMEDOUT; - else - mrq->cmd->error = -ETIMEDOUT; - - host->cmd = NULL; - host->data = NULL; - - spin_unlock_irqrestore(&host->lock, flags); - - tmio_mmc_reset(host); - - /* Ready for new calls */ - host->mrq = NULL; - - tmio_mmc_abort_dma(host); - mmc_request_done(host->mmc, mrq); -} - -/* These are the bitmasks the tmio chip requires to implement the MMC response - * types. Note that R1 and R6 are the same in this scheme. */ -#define APP_CMD 0x0040 -#define RESP_NONE 0x0300 -#define RESP_R1 0x0400 -#define RESP_R1B 0x0500 -#define RESP_R2 0x0600 -#define RESP_R3 0x0700 -#define DATA_PRESENT 0x0800 -#define TRANSFER_READ 0x1000 -#define TRANSFER_MULTI 0x2000 -#define SECURITY_CMD 0x4000 -#define NO_CMD12_ISSUE 0x4000 /* TMIO_MMC_HAVE_CMD12_CTRL */ - -static int tmio_mmc_start_command(struct tmio_mmc_host *host, - struct mmc_command *cmd) -{ - struct mmc_data *data = host->data; - int c = cmd->opcode; - u32 irq_mask = TMIO_MASK_CMD; - - switch (mmc_resp_type(cmd)) { - case MMC_RSP_NONE: c |= RESP_NONE; break; - case MMC_RSP_R1: - case MMC_RSP_R1_NO_CRC: - c |= RESP_R1; break; - case MMC_RSP_R1B: c |= RESP_R1B; break; - case MMC_RSP_R2: c |= RESP_R2; break; - case MMC_RSP_R3: c |= RESP_R3; break; - default: - pr_debug("Unknown response type %d\n", mmc_resp_type(cmd)); - return -EINVAL; - } - - host->cmd = cmd; - -/* FIXME - this seems to be ok commented out but the spec suggest this bit - * should be set when issuing app commands. - * if(cmd->flags & MMC_FLAG_ACMD) - * c |= APP_CMD; - */ - if (data) { - c |= DATA_PRESENT; - if (data->blocks > 1) { - sd_ctrl_write16(host, CTL_STOP_INTERNAL_ACTION, TMIO_STOP_SEC); - c |= TRANSFER_MULTI; - - /* - * Disable auto CMD12 at IO_RW_EXTENDED and - * SET_BLOCK_COUNT when doing multiple block transfer - */ - if ((host->pdata->flags & TMIO_MMC_HAVE_CMD12_CTRL) && - (cmd->opcode == SD_IO_RW_EXTENDED || host->mrq->sbc)) - c |= NO_CMD12_ISSUE; - } - if (data->flags & MMC_DATA_READ) - c |= TRANSFER_READ; - } - - tmio_mmc_enable_mmc_irqs(host, irq_mask); - - /* Fire off the command */ - sd_ctrl_write32_as_16_and_16(host, CTL_ARG_REG, cmd->arg); - sd_ctrl_write16(host, CTL_SD_CMD, c); - - return 0; -} - -static void tmio_mmc_transfer_data(struct tmio_mmc_host *host, - unsigned short *buf, - unsigned int count) -{ - int is_read = host->data->flags & MMC_DATA_READ; - u8 *buf8; - - /* - * Transfer the data - */ - if (host->pdata->flags & TMIO_MMC_32BIT_DATA_PORT) { - u32 data = 0; - u32 *buf32 = (u32 *)buf; - - if (is_read) - sd_ctrl_read32_rep(host, CTL_SD_DATA_PORT, buf32, - count >> 2); - else - sd_ctrl_write32_rep(host, CTL_SD_DATA_PORT, buf32, - count >> 2); - - /* if count was multiple of 4 */ - if (!(count & 0x3)) - return; - - buf32 += count >> 2; - count %= 4; - - if (is_read) { - sd_ctrl_read32_rep(host, CTL_SD_DATA_PORT, &data, 1); - memcpy(buf32, &data, count); - } else { - memcpy(&data, buf32, count); - sd_ctrl_write32_rep(host, CTL_SD_DATA_PORT, &data, 1); - } - - return; - } - - if (is_read) - sd_ctrl_read16_rep(host, CTL_SD_DATA_PORT, buf, count >> 1); - else - sd_ctrl_write16_rep(host, CTL_SD_DATA_PORT, buf, count >> 1); - - /* if count was even number */ - if (!(count & 0x1)) - return; - - /* if count was odd number */ - buf8 = (u8 *)(buf + (count >> 1)); - - /* - * FIXME - * - * driver and this function are assuming that - * it is used as little endian - */ - if (is_read) - *buf8 = sd_ctrl_read16(host, CTL_SD_DATA_PORT) & 0xff; - else - sd_ctrl_write16(host, CTL_SD_DATA_PORT, *buf8); -} - -/* - * This chip always returns (at least?) as much data as you ask for. - * I'm unsure what happens if you ask for less than a block. This should be - * looked into to ensure that a funny length read doesn't hose the controller. - */ -static void tmio_mmc_pio_irq(struct tmio_mmc_host *host) -{ - struct mmc_data *data = host->data; - void *sg_virt; - unsigned short *buf; - unsigned int count; - unsigned long flags; - - if ((host->chan_tx || host->chan_rx) && !host->force_pio) { - pr_err("PIO IRQ in DMA mode!\n"); - return; - } else if (!data) { - pr_debug("Spurious PIO IRQ\n"); - return; - } - - sg_virt = tmio_mmc_kmap_atomic(host->sg_ptr, &flags); - buf = (unsigned short *)(sg_virt + host->sg_off); - - count = host->sg_ptr->length - host->sg_off; - if (count > data->blksz) - count = data->blksz; - - pr_debug("count: %08x offset: %08x flags %08x\n", - count, host->sg_off, data->flags); - - /* Transfer the data */ - tmio_mmc_transfer_data(host, buf, count); - - host->sg_off += count; - - tmio_mmc_kunmap_atomic(host->sg_ptr, &flags, sg_virt); - - if (host->sg_off == host->sg_ptr->length) - tmio_mmc_next_sg(host); -} - -static void tmio_mmc_check_bounce_buffer(struct tmio_mmc_host *host) -{ - if (host->sg_ptr == &host->bounce_sg) { - unsigned long flags; - void *sg_vaddr = tmio_mmc_kmap_atomic(host->sg_orig, &flags); - - memcpy(sg_vaddr, host->bounce_buf, host->bounce_sg.length); - tmio_mmc_kunmap_atomic(host->sg_orig, &flags, sg_vaddr); - } -} - -/* needs to be called with host->lock held */ -void tmio_mmc_do_data_irq(struct tmio_mmc_host *host) -{ - struct mmc_data *data = host->data; - struct mmc_command *stop; - - host->data = NULL; - - if (!data) { - dev_warn(&host->pdev->dev, "Spurious data end IRQ\n"); - return; - } - stop = data->stop; - - /* FIXME - return correct transfer count on errors */ - if (!data->error) - data->bytes_xfered = data->blocks * data->blksz; - else - data->bytes_xfered = 0; - - pr_debug("Completed data request\n"); - - /* - * FIXME: other drivers allow an optional stop command of any given type - * which we dont do, as the chip can auto generate them. - * Perhaps we can be smarter about when to use auto CMD12 and - * only issue the auto request when we know this is the desired - * stop command, allowing fallback to the stop command the - * upper layers expect. For now, we do what works. - */ - - if (data->flags & MMC_DATA_READ) { - if (host->chan_rx && !host->force_pio) - tmio_mmc_check_bounce_buffer(host); - dev_dbg(&host->pdev->dev, "Complete Rx request %p\n", - host->mrq); - } else { - dev_dbg(&host->pdev->dev, "Complete Tx request %p\n", - host->mrq); - } - - if (stop && !host->mrq->sbc) { - if (stop->opcode != MMC_STOP_TRANSMISSION || stop->arg) - dev_err(&host->pdev->dev, "unsupported stop: CMD%u,0x%x. We did CMD12,0\n", - stop->opcode, stop->arg); - - /* fill in response from auto CMD12 */ - stop->resp[0] = sd_ctrl_read16_and_16_as_32(host, CTL_RESPONSE); - - sd_ctrl_write16(host, CTL_STOP_INTERNAL_ACTION, 0); - } - - schedule_work(&host->done); -} -EXPORT_SYMBOL_GPL(tmio_mmc_do_data_irq); - -static void tmio_mmc_data_irq(struct tmio_mmc_host *host, unsigned int stat) -{ - struct mmc_data *data; - - spin_lock(&host->lock); - data = host->data; - - if (!data) - goto out; - - if (stat & TMIO_STAT_CRCFAIL || stat & TMIO_STAT_STOPBIT_ERR || - stat & TMIO_STAT_TXUNDERRUN) - data->error = -EILSEQ; - if (host->chan_tx && (data->flags & MMC_DATA_WRITE) && !host->force_pio) { - u32 status = sd_ctrl_read16_and_16_as_32(host, CTL_STATUS); - bool done = false; - - /* - * Has all data been written out yet? Testing on SuperH showed, - * that in most cases the first interrupt comes already with the - * BUSY status bit clear, but on some operations, like mount or - * in the beginning of a write / sync / umount, there is one - * DATAEND interrupt with the BUSY bit set, in this cases - * waiting for one more interrupt fixes the problem. - */ - if (host->pdata->flags & TMIO_MMC_HAS_IDLE_WAIT) { - if (status & TMIO_STAT_SCLKDIVEN) - done = true; - } else { - if (!(status & TMIO_STAT_CMD_BUSY)) - done = true; - } - - if (done) { - tmio_mmc_disable_mmc_irqs(host, TMIO_STAT_DATAEND); - tmio_mmc_dataend_dma(host); - } - } else if (host->chan_rx && (data->flags & MMC_DATA_READ) && !host->force_pio) { - tmio_mmc_disable_mmc_irqs(host, TMIO_STAT_DATAEND); - tmio_mmc_dataend_dma(host); - } else { - tmio_mmc_do_data_irq(host); - tmio_mmc_disable_mmc_irqs(host, TMIO_MASK_READOP | TMIO_MASK_WRITEOP); - } -out: - spin_unlock(&host->lock); -} - -static void tmio_mmc_cmd_irq(struct tmio_mmc_host *host, unsigned int stat) -{ - struct mmc_command *cmd = host->cmd; - int i, addr; - - spin_lock(&host->lock); - - if (!host->cmd) { - pr_debug("Spurious CMD irq\n"); - goto out; - } - - /* This controller is sicker than the PXA one. Not only do we need to - * drop the top 8 bits of the first response word, we also need to - * modify the order of the response for short response command types. - */ - - for (i = 3, addr = CTL_RESPONSE ; i >= 0 ; i--, addr += 4) - cmd->resp[i] = sd_ctrl_read16_and_16_as_32(host, addr); - - if (cmd->flags & MMC_RSP_136) { - cmd->resp[0] = (cmd->resp[0] << 8) | (cmd->resp[1] >> 24); - cmd->resp[1] = (cmd->resp[1] << 8) | (cmd->resp[2] >> 24); - cmd->resp[2] = (cmd->resp[2] << 8) | (cmd->resp[3] >> 24); - cmd->resp[3] <<= 8; - } else if (cmd->flags & MMC_RSP_R3) { - cmd->resp[0] = cmd->resp[3]; - } - - if (stat & TMIO_STAT_CMDTIMEOUT) - cmd->error = -ETIMEDOUT; - else if ((stat & TMIO_STAT_CRCFAIL && cmd->flags & MMC_RSP_CRC) || - stat & TMIO_STAT_STOPBIT_ERR || - stat & TMIO_STAT_CMD_IDX_ERR) - cmd->error = -EILSEQ; - - /* If there is data to handle we enable data IRQs here, and - * we will ultimatley finish the request in the data_end handler. - * If theres no data or we encountered an error, finish now. - */ - if (host->data && (!cmd->error || cmd->error == -EILSEQ)) { - if (host->data->flags & MMC_DATA_READ) { - if (host->force_pio || !host->chan_rx) { - tmio_mmc_enable_mmc_irqs(host, TMIO_MASK_READOP); - } else { - tmio_mmc_disable_mmc_irqs(host, - TMIO_MASK_READOP); - tasklet_schedule(&host->dma_issue); - } - } else { - if (host->force_pio || !host->chan_tx) { - tmio_mmc_enable_mmc_irqs(host, TMIO_MASK_WRITEOP); - } else { - tmio_mmc_disable_mmc_irqs(host, - TMIO_MASK_WRITEOP); - tasklet_schedule(&host->dma_issue); - } - } - } else { - schedule_work(&host->done); - } - -out: - spin_unlock(&host->lock); -} - -static bool __tmio_mmc_card_detect_irq(struct tmio_mmc_host *host, - int ireg, int status) -{ - struct mmc_host *mmc = host->mmc; - - /* Card insert / remove attempts */ - if (ireg & (TMIO_STAT_CARD_INSERT | TMIO_STAT_CARD_REMOVE)) { - tmio_mmc_ack_mmc_irqs(host, TMIO_STAT_CARD_INSERT | - TMIO_STAT_CARD_REMOVE); - if ((((ireg & TMIO_STAT_CARD_REMOVE) && mmc->card) || - ((ireg & TMIO_STAT_CARD_INSERT) && !mmc->card)) && - !work_pending(&mmc->detect.work)) - mmc_detect_change(host->mmc, msecs_to_jiffies(100)); - return true; - } - - return false; -} - -static bool __tmio_mmc_sdcard_irq(struct tmio_mmc_host *host, int ireg, - int status) -{ - /* Command completion */ - if (ireg & (TMIO_STAT_CMDRESPEND | TMIO_STAT_CMDTIMEOUT)) { - tmio_mmc_ack_mmc_irqs(host, TMIO_STAT_CMDRESPEND | - TMIO_STAT_CMDTIMEOUT); - tmio_mmc_cmd_irq(host, status); - return true; - } - - /* Data transfer */ - if (ireg & (TMIO_STAT_RXRDY | TMIO_STAT_TXRQ)) { - tmio_mmc_ack_mmc_irqs(host, TMIO_STAT_RXRDY | TMIO_STAT_TXRQ); - tmio_mmc_pio_irq(host); - return true; - } - - /* Data transfer completion */ - if (ireg & TMIO_STAT_DATAEND) { - tmio_mmc_ack_mmc_irqs(host, TMIO_STAT_DATAEND); - tmio_mmc_data_irq(host, status); - return true; - } - - return false; -} - -static void __tmio_mmc_sdio_irq(struct tmio_mmc_host *host) -{ - struct mmc_host *mmc = host->mmc; - struct tmio_mmc_data *pdata = host->pdata; - unsigned int ireg, status; - unsigned int sdio_status; - - if (!(pdata->flags & TMIO_MMC_SDIO_IRQ)) - return; - - status = sd_ctrl_read16(host, CTL_SDIO_STATUS); - ireg = status & TMIO_SDIO_MASK_ALL & ~host->sdio_irq_mask; - - sdio_status = status & ~TMIO_SDIO_MASK_ALL; - if (pdata->flags & TMIO_MMC_SDIO_STATUS_SETBITS) - sdio_status |= TMIO_SDIO_SETBITS_MASK; - - sd_ctrl_write16(host, CTL_SDIO_STATUS, sdio_status); - - if (mmc->caps & MMC_CAP_SDIO_IRQ && ireg & TMIO_SDIO_STAT_IOIRQ) - mmc_signal_sdio_irq(mmc); -} - -irqreturn_t tmio_mmc_irq(int irq, void *devid) -{ - struct tmio_mmc_host *host = devid; - unsigned int ireg, status; - - status = sd_ctrl_read16_and_16_as_32(host, CTL_STATUS); - ireg = status & TMIO_MASK_IRQ & ~host->sdcard_irq_mask; - - /* Clear the status except the interrupt status */ - sd_ctrl_write32_as_16_and_16(host, CTL_STATUS, TMIO_MASK_IRQ); - - if (__tmio_mmc_card_detect_irq(host, ireg, status)) - return IRQ_HANDLED; - if (__tmio_mmc_sdcard_irq(host, ireg, status)) - return IRQ_HANDLED; - - __tmio_mmc_sdio_irq(host); - - return IRQ_HANDLED; -} -EXPORT_SYMBOL_GPL(tmio_mmc_irq); - -static int tmio_mmc_start_data(struct tmio_mmc_host *host, - struct mmc_data *data) -{ - struct tmio_mmc_data *pdata = host->pdata; - - pr_debug("setup data transfer: blocksize %08x nr_blocks %d\n", - data->blksz, data->blocks); - - /* Some hardware cannot perform 2 byte requests in 4/8 bit mode */ - if (host->mmc->ios.bus_width == MMC_BUS_WIDTH_4 || - host->mmc->ios.bus_width == MMC_BUS_WIDTH_8) { - int blksz_2bytes = pdata->flags & TMIO_MMC_BLKSZ_2BYTES; - - if (data->blksz < 2 || (data->blksz < 4 && !blksz_2bytes)) { - pr_err("%s: %d byte block unsupported in 4/8 bit mode\n", - mmc_hostname(host->mmc), data->blksz); - return -EINVAL; - } - } - - tmio_mmc_init_sg(host, data); - host->data = data; - host->force_pio = false; - - /* Set transfer length / blocksize */ - sd_ctrl_write16(host, CTL_SD_XFER_LEN, data->blksz); - sd_ctrl_write16(host, CTL_XFER_BLK_COUNT, data->blocks); - - tmio_mmc_start_dma(host, data); - - return 0; -} - -static void tmio_mmc_hw_reset(struct mmc_host *mmc) -{ - struct tmio_mmc_host *host = mmc_priv(mmc); - - if (host->hw_reset) - host->hw_reset(host); -} - -static int tmio_mmc_execute_tuning(struct mmc_host *mmc, u32 opcode) -{ - struct tmio_mmc_host *host = mmc_priv(mmc); - int i, ret = 0; - - if (!host->init_tuning || !host->select_tuning) - /* Tuning is not supported */ - goto out; - - host->tap_num = host->init_tuning(host); - if (!host->tap_num) - /* Tuning is not supported */ - goto out; - - if (host->tap_num * 2 >= sizeof(host->taps) * BITS_PER_BYTE) { - dev_warn_once(&host->pdev->dev, - "Too many taps, skipping tuning. Please consider updating size of taps field of tmio_mmc_host\n"); - goto out; - } - - bitmap_zero(host->taps, host->tap_num * 2); - - /* Issue CMD19 twice for each tap */ - for (i = 0; i < 2 * host->tap_num; i++) { - if (host->prepare_tuning) - host->prepare_tuning(host, i % host->tap_num); - - ret = mmc_send_tuning(mmc, opcode, NULL); - if (ret && ret != -EILSEQ) - goto out; - if (ret == 0) - set_bit(i, host->taps); - - usleep_range(1000, 1200); - } - - ret = host->select_tuning(host); - -out: - if (ret < 0) { - dev_warn(&host->pdev->dev, "Tuning procedure failed\n"); - tmio_mmc_hw_reset(mmc); - } - - return ret; -} - -static void tmio_process_mrq(struct tmio_mmc_host *host, - struct mmc_request *mrq) -{ - struct mmc_command *cmd; - int ret; - - if (mrq->sbc && host->cmd != mrq->sbc) { - cmd = mrq->sbc; - } else { - cmd = mrq->cmd; - if (mrq->data) { - ret = tmio_mmc_start_data(host, mrq->data); - if (ret) - goto fail; - } - } - - ret = tmio_mmc_start_command(host, cmd); - if (ret) - goto fail; - - schedule_delayed_work(&host->delayed_reset_work, - msecs_to_jiffies(CMDREQ_TIMEOUT)); - return; - -fail: - host->mrq = NULL; - mrq->cmd->error = ret; - mmc_request_done(host->mmc, mrq); -} - -/* Process requests from the MMC layer */ -static void tmio_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq) -{ - struct tmio_mmc_host *host = mmc_priv(mmc); - unsigned long flags; - - spin_lock_irqsave(&host->lock, flags); - - if (host->mrq) { - pr_debug("request not null\n"); - if (IS_ERR(host->mrq)) { - spin_unlock_irqrestore(&host->lock, flags); - mrq->cmd->error = -EAGAIN; - mmc_request_done(mmc, mrq); - return; - } - } - - host->last_req_ts = jiffies; - wmb(); - host->mrq = mrq; - - spin_unlock_irqrestore(&host->lock, flags); - - tmio_process_mrq(host, mrq); -} - -static void tmio_mmc_finish_request(struct tmio_mmc_host *host) -{ - struct mmc_request *mrq; - unsigned long flags; - - spin_lock_irqsave(&host->lock, flags); - - mrq = host->mrq; - if (IS_ERR_OR_NULL(mrq)) { - spin_unlock_irqrestore(&host->lock, flags); - return; - } - - /* If not SET_BLOCK_COUNT, clear old data */ - if (host->cmd != mrq->sbc) { - host->cmd = NULL; - host->data = NULL; - host->mrq = NULL; - } - - cancel_delayed_work(&host->delayed_reset_work); - - spin_unlock_irqrestore(&host->lock, flags); - - if (mrq->cmd->error || (mrq->data && mrq->data->error)) - tmio_mmc_abort_dma(host); - - if (host->check_scc_error) - host->check_scc_error(host); - - /* If SET_BLOCK_COUNT, continue with main command */ - if (host->mrq && !mrq->cmd->error) { - tmio_process_mrq(host, mrq); - return; - } - - mmc_request_done(host->mmc, mrq); -} - -static void tmio_mmc_done_work(struct work_struct *work) -{ - struct tmio_mmc_host *host = container_of(work, struct tmio_mmc_host, - done); - tmio_mmc_finish_request(host); -} - -static void tmio_mmc_power_on(struct tmio_mmc_host *host, unsigned short vdd) -{ - struct mmc_host *mmc = host->mmc; - int ret = 0; - - /* .set_ios() is returning void, so, no chance to report an error */ - - if (host->set_pwr) - host->set_pwr(host->pdev, 1); - - if (!IS_ERR(mmc->supply.vmmc)) { - ret = mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, vdd); - /* - * Attention: empiric value. With a b43 WiFi SDIO card this - * delay proved necessary for reliable card-insertion probing. - * 100us were not enough. Is this the same 140us delay, as in - * tmio_mmc_set_ios()? - */ - usleep_range(200, 300); - } - /* - * It seems, VccQ should be switched on after Vcc, this is also what the - * omap_hsmmc.c driver does. - */ - if (!IS_ERR(mmc->supply.vqmmc) && !ret) { - ret = regulator_enable(mmc->supply.vqmmc); - usleep_range(200, 300); - } - - if (ret < 0) - dev_dbg(&host->pdev->dev, "Regulators failed to power up: %d\n", - ret); -} - -static void tmio_mmc_power_off(struct tmio_mmc_host *host) -{ - struct mmc_host *mmc = host->mmc; - - if (!IS_ERR(mmc->supply.vqmmc)) - regulator_disable(mmc->supply.vqmmc); - - if (!IS_ERR(mmc->supply.vmmc)) - mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, 0); - - if (host->set_pwr) - host->set_pwr(host->pdev, 0); -} - -static void tmio_mmc_set_bus_width(struct tmio_mmc_host *host, - unsigned char bus_width) -{ - u16 reg = sd_ctrl_read16(host, CTL_SD_MEM_CARD_OPT) - & ~(CARD_OPT_WIDTH | CARD_OPT_WIDTH8); - - /* reg now applies to MMC_BUS_WIDTH_4 */ - if (bus_width == MMC_BUS_WIDTH_1) - reg |= CARD_OPT_WIDTH; - else if (bus_width == MMC_BUS_WIDTH_8) - reg |= CARD_OPT_WIDTH8; - - sd_ctrl_write16(host, CTL_SD_MEM_CARD_OPT, reg); -} - -/* Set MMC clock / power. - * Note: This controller uses a simple divider scheme therefore it cannot - * run a MMC card at full speed (20MHz). The max clock is 24MHz on SD, but as - * MMC wont run that fast, it has to be clocked at 12MHz which is the next - * slowest setting. - */ -static void tmio_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) -{ - struct tmio_mmc_host *host = mmc_priv(mmc); - struct device *dev = &host->pdev->dev; - unsigned long flags; - - mutex_lock(&host->ios_lock); - - spin_lock_irqsave(&host->lock, flags); - if (host->mrq) { - if (IS_ERR(host->mrq)) { - dev_dbg(dev, - "%s.%d: concurrent .set_ios(), clk %u, mode %u\n", - current->comm, task_pid_nr(current), - ios->clock, ios->power_mode); - host->mrq = ERR_PTR(-EINTR); - } else { - dev_dbg(dev, - "%s.%d: CMD%u active since %lu, now %lu!\n", - current->comm, task_pid_nr(current), - host->mrq->cmd->opcode, host->last_req_ts, - jiffies); - } - spin_unlock_irqrestore(&host->lock, flags); - - mutex_unlock(&host->ios_lock); - return; - } - - host->mrq = ERR_PTR(-EBUSY); - - spin_unlock_irqrestore(&host->lock, flags); - - switch (ios->power_mode) { - case MMC_POWER_OFF: - tmio_mmc_power_off(host); - tmio_mmc_clk_stop(host); - break; - case MMC_POWER_UP: - tmio_mmc_power_on(host, ios->vdd); - tmio_mmc_set_clock(host, ios->clock); - tmio_mmc_set_bus_width(host, ios->bus_width); - break; - case MMC_POWER_ON: - tmio_mmc_set_clock(host, ios->clock); - tmio_mmc_set_bus_width(host, ios->bus_width); - break; - } - - /* Let things settle. delay taken from winCE driver */ - usleep_range(140, 200); - if (PTR_ERR(host->mrq) == -EINTR) - dev_dbg(&host->pdev->dev, - "%s.%d: IOS interrupted: clk %u, mode %u", - current->comm, task_pid_nr(current), - ios->clock, ios->power_mode); - host->mrq = NULL; - - host->clk_cache = ios->clock; - - mutex_unlock(&host->ios_lock); -} - -static int tmio_mmc_get_ro(struct mmc_host *mmc) -{ - struct tmio_mmc_host *host = mmc_priv(mmc); - - return !(sd_ctrl_read16_and_16_as_32(host, CTL_STATUS) & - TMIO_STAT_WRPROTECT); -} - -static int tmio_mmc_get_cd(struct mmc_host *mmc) -{ - struct tmio_mmc_host *host = mmc_priv(mmc); - - return !!(sd_ctrl_read16_and_16_as_32(host, CTL_STATUS) & - TMIO_STAT_SIGSTATE); -} - -static int tmio_multi_io_quirk(struct mmc_card *card, - unsigned int direction, int blk_size) -{ - struct tmio_mmc_host *host = mmc_priv(card->host); - - if (host->multi_io_quirk) - return host->multi_io_quirk(card, direction, blk_size); - - return blk_size; -} - -static const struct mmc_host_ops tmio_mmc_ops = { - .request = tmio_mmc_request, - .set_ios = tmio_mmc_set_ios, - .get_ro = tmio_mmc_get_ro, - .get_cd = tmio_mmc_get_cd, - .enable_sdio_irq = tmio_mmc_enable_sdio_irq, - .multi_io_quirk = tmio_multi_io_quirk, - .hw_reset = tmio_mmc_hw_reset, - .execute_tuning = tmio_mmc_execute_tuning, -}; - -static int tmio_mmc_init_ocr(struct tmio_mmc_host *host) -{ - struct tmio_mmc_data *pdata = host->pdata; - struct mmc_host *mmc = host->mmc; - int err; - - err = mmc_regulator_get_supply(mmc); - if (err) - return err; - - /* use ocr_mask if no regulator */ - if (!mmc->ocr_avail) - mmc->ocr_avail = pdata->ocr_mask; - - /* - * try again. - * There is possibility that regulator has not been probed - */ - if (!mmc->ocr_avail) - return -EPROBE_DEFER; - - return 0; -} - -static void tmio_mmc_of_parse(struct platform_device *pdev, - struct mmc_host *mmc) -{ - const struct device_node *np = pdev->dev.of_node; - - if (!np) - return; - - /* - * DEPRECATED: - * For new platforms, please use "disable-wp" instead of - * "toshiba,mmc-wrprotect-disable" - */ - if (of_get_property(np, "toshiba,mmc-wrprotect-disable", NULL)) - mmc->caps2 |= MMC_CAP2_NO_WRITE_PROTECT; -} - -struct tmio_mmc_host *tmio_mmc_host_alloc(struct platform_device *pdev, - struct tmio_mmc_data *pdata) -{ - struct tmio_mmc_host *host; - struct mmc_host *mmc; - struct resource *res; - void __iomem *ctl; - int ret; - - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - ctl = devm_ioremap_resource(&pdev->dev, res); - if (IS_ERR(ctl)) - return ERR_CAST(ctl); - - mmc = mmc_alloc_host(sizeof(struct tmio_mmc_host), &pdev->dev); - if (!mmc) - return ERR_PTR(-ENOMEM); - - host = mmc_priv(mmc); - host->ctl = ctl; - host->mmc = mmc; - host->pdev = pdev; - host->pdata = pdata; - host->ops = tmio_mmc_ops; - mmc->ops = &host->ops; - - ret = mmc_of_parse(host->mmc); - if (ret) { - host = ERR_PTR(ret); - goto free; - } - - tmio_mmc_of_parse(pdev, mmc); - - platform_set_drvdata(pdev, host); - - return host; -free: - mmc_free_host(mmc); - - return host; -} -EXPORT_SYMBOL_GPL(tmio_mmc_host_alloc); - -void tmio_mmc_host_free(struct tmio_mmc_host *host) -{ - mmc_free_host(host->mmc); -} -EXPORT_SYMBOL_GPL(tmio_mmc_host_free); - -int tmio_mmc_host_probe(struct tmio_mmc_host *_host) -{ - struct platform_device *pdev = _host->pdev; - struct tmio_mmc_data *pdata = _host->pdata; - struct mmc_host *mmc = _host->mmc; - int ret; - - /* - * Check the sanity of mmc->f_min to prevent tmio_mmc_set_clock() from - * looping forever... - */ - if (mmc->f_min == 0) - return -EINVAL; - - if (!(pdata->flags & TMIO_MMC_HAS_IDLE_WAIT)) - _host->write16_hook = NULL; - - _host->set_pwr = pdata->set_pwr; - _host->set_clk_div = pdata->set_clk_div; - - ret = tmio_mmc_init_ocr(_host); - if (ret < 0) - return ret; - - if (pdata->flags & TMIO_MMC_USE_GPIO_CD) { - ret = mmc_gpio_request_cd(mmc, pdata->cd_gpio, 0); - if (ret) - return ret; - } - - mmc->caps |= MMC_CAP_4_BIT_DATA | pdata->capabilities; - mmc->caps2 |= pdata->capabilities2; - mmc->max_segs = pdata->max_segs ? : 32; - mmc->max_blk_size = 512; - mmc->max_blk_count = pdata->max_blk_count ? : - (PAGE_SIZE / mmc->max_blk_size) * mmc->max_segs; - mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count; - /* - * Since swiotlb has memory size limitation, this will calculate - * the maximum size locally (because we don't have any APIs for it now) - * and check the current max_req_size. And then, this will update - * the max_req_size if needed as a workaround. - */ - if (swiotlb_max_segment()) { - unsigned int max_size = (1 << IO_TLB_SHIFT) * IO_TLB_SEGSIZE; - - if (mmc->max_req_size > max_size) - mmc->max_req_size = max_size; - } - mmc->max_seg_size = mmc->max_req_size; - - if (mmc_can_gpio_ro(mmc)) - _host->ops.get_ro = mmc_gpio_get_ro; - - if (mmc_can_gpio_cd(mmc)) - _host->ops.get_cd = mmc_gpio_get_cd; - - _host->native_hotplug = !(mmc_can_gpio_cd(mmc) || - mmc->caps & MMC_CAP_NEEDS_POLL || - !mmc_card_is_removable(mmc)); - - /* - * On Gen2+, eMMC with NONREMOVABLE currently fails because native - * hotplug gets disabled. It seems RuntimePM related yet we need further - * research. Since we are planning a PM overhaul anyway, let's enforce - * for now the device being active by enabling native hotplug always. - */ - if (pdata->flags & TMIO_MMC_MIN_RCAR2) - _host->native_hotplug = true; - - /* - * While using internal tmio hardware logic for card detection, we need - * to ensure it stays powered for it to work. - */ - if (_host->native_hotplug) - pm_runtime_get_noresume(&pdev->dev); - - _host->sdio_irq_enabled = false; - if (pdata->flags & TMIO_MMC_SDIO_IRQ) - _host->sdio_irq_mask = TMIO_SDIO_MASK_ALL; - - tmio_mmc_clk_stop(_host); - tmio_mmc_reset(_host); - - _host->sdcard_irq_mask = sd_ctrl_read16_and_16_as_32(_host, CTL_IRQ_MASK); - tmio_mmc_disable_mmc_irqs(_host, TMIO_MASK_ALL); - - if (_host->native_hotplug) - tmio_mmc_enable_mmc_irqs(_host, - TMIO_STAT_CARD_REMOVE | TMIO_STAT_CARD_INSERT); - - spin_lock_init(&_host->lock); - mutex_init(&_host->ios_lock); - - /* Init delayed work for request timeouts */ - INIT_DELAYED_WORK(&_host->delayed_reset_work, tmio_mmc_reset_work); - INIT_WORK(&_host->done, tmio_mmc_done_work); - - /* See if we also get DMA */ - tmio_mmc_request_dma(_host, pdata); - - pm_runtime_set_active(&pdev->dev); - pm_runtime_set_autosuspend_delay(&pdev->dev, 50); - pm_runtime_use_autosuspend(&pdev->dev); - pm_runtime_enable(&pdev->dev); - - ret = mmc_add_host(mmc); - if (ret) - goto remove_host; - - dev_pm_qos_expose_latency_limit(&pdev->dev, 100); - - return 0; - -remove_host: - tmio_mmc_host_remove(_host); - return ret; -} -EXPORT_SYMBOL_GPL(tmio_mmc_host_probe); - -void tmio_mmc_host_remove(struct tmio_mmc_host *host) -{ - struct platform_device *pdev = host->pdev; - struct mmc_host *mmc = host->mmc; - - if (host->pdata->flags & TMIO_MMC_SDIO_IRQ) - sd_ctrl_write16(host, CTL_TRANSACTION_CTL, 0x0000); - - if (!host->native_hotplug) - pm_runtime_get_sync(&pdev->dev); - - dev_pm_qos_hide_latency_limit(&pdev->dev); - - mmc_remove_host(mmc); - cancel_work_sync(&host->done); - cancel_delayed_work_sync(&host->delayed_reset_work); - tmio_mmc_release_dma(host); - - pm_runtime_put_sync(&pdev->dev); - pm_runtime_disable(&pdev->dev); -} -EXPORT_SYMBOL_GPL(tmio_mmc_host_remove); - -#ifdef CONFIG_PM -static int tmio_mmc_clk_enable(struct tmio_mmc_host *host) -{ - if (!host->clk_enable) - return -ENOTSUPP; - - return host->clk_enable(host); -} - -static void tmio_mmc_clk_disable(struct tmio_mmc_host *host) -{ - if (host->clk_disable) - host->clk_disable(host); -} - -int tmio_mmc_host_runtime_suspend(struct device *dev) -{ - struct tmio_mmc_host *host = dev_get_drvdata(dev); - - tmio_mmc_disable_mmc_irqs(host, TMIO_MASK_ALL); - - if (host->clk_cache) - tmio_mmc_clk_stop(host); - - tmio_mmc_clk_disable(host); - - return 0; -} -EXPORT_SYMBOL_GPL(tmio_mmc_host_runtime_suspend); - -static bool tmio_mmc_can_retune(struct tmio_mmc_host *host) -{ - return host->tap_num && mmc_can_retune(host->mmc); -} - -int tmio_mmc_host_runtime_resume(struct device *dev) -{ - struct tmio_mmc_host *host = dev_get_drvdata(dev); - - tmio_mmc_reset(host); - tmio_mmc_clk_enable(host); - - if (host->clk_cache) - tmio_mmc_set_clock(host, host->clk_cache); - - if (host->native_hotplug) - tmio_mmc_enable_mmc_irqs(host, - TMIO_STAT_CARD_REMOVE | TMIO_STAT_CARD_INSERT); - - tmio_mmc_enable_dma(host, true); - - if (tmio_mmc_can_retune(host) && host->select_tuning(host)) - dev_warn(&host->pdev->dev, "Tuning selection failed\n"); - - return 0; -} -EXPORT_SYMBOL_GPL(tmio_mmc_host_runtime_resume); -#endif - -MODULE_LICENSE("GPL v2"); diff --git a/drivers/mmc/host/tmio_mmc_original.c b/drivers/mmc/host/tmio_mmc_original.c new file mode 100644 index 0000000..43a2ea5 --- /dev/null +++ b/drivers/mmc/host/tmio_mmc_original.c @@ -0,0 +1,167 @@ +/* + * Driver for the MMC / SD / SDIO cell found in: + * + * TC6393XB TC6391XB TC6387XB T7L66XB ASIC3 + * + * Copyright (C) 2017 Renesas Electronics Corporation + * Copyright (C) 2017 Horms Solutions, Simon Horman + * Copyright (C) 2007 Ian Molton + * Copyright (C) 2004 Ian Molton + * + * 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/device.h> +#include <linux/mfd/core.h> +#include <linux/mfd/tmio.h> +#include <linux/mmc/host.h> +#include <linux/module.h> +#include <linux/pagemap.h> +#include <linux/scatterlist.h> + +#include "tmio_mmc.h" + +#ifdef CONFIG_PM_SLEEP +static int tmio_mmc_suspend(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + const struct mfd_cell *cell = mfd_get_cell(pdev); + int ret; + + ret = pm_runtime_force_suspend(dev); + + /* Tell MFD core it can disable us now.*/ + if (!ret && cell->disable) + cell->disable(pdev); + + return ret; +} + +static int tmio_mmc_resume(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + const struct mfd_cell *cell = mfd_get_cell(pdev); + int ret = 0; + + /* Tell the MFD core we are ready to be enabled */ + if (cell->resume) + ret = cell->resume(pdev); + + if (!ret) + ret = pm_runtime_force_resume(dev); + + return ret; +} +#endif + +static int tmio_mmc_probe(struct platform_device *pdev) +{ + const struct mfd_cell *cell = mfd_get_cell(pdev); + struct tmio_mmc_data *pdata; + struct tmio_mmc_host *host; + struct resource *res; + int ret = -EINVAL, irq; + + if (pdev->num_resources != 2) + goto out; + + pdata = pdev->dev.platform_data; + if (!pdata || !pdata->hclk) + goto out; + + irq = platform_get_irq(pdev, 0); + if (irq < 0) { + ret = irq; + goto out; + } + + /* Tell the MFD core we are ready to be enabled */ + if (cell->enable) { + ret = cell->enable(pdev); + if (ret) + goto out; + } + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + ret = -EINVAL; + goto cell_disable; + } + + pdata->flags |= TMIO_MMC_HAVE_HIGH_REG; + + host = tmio_mmc_host_alloc(pdev, pdata); + if (IS_ERR(host)) { + ret = PTR_ERR(host); + goto cell_disable; + } + + /* SD control register space size is 0x200, 0x400 for bus_shift=1 */ + host->bus_shift = resource_size(res) >> 10; + + host->mmc->f_max = pdata->hclk; + host->mmc->f_min = pdata->hclk / 512; + + ret = tmio_mmc_host_probe(host); + if (ret) + goto host_free; + + ret = devm_request_irq(&pdev->dev, irq, tmio_mmc_irq, + IRQF_TRIGGER_FALLING, + dev_name(&pdev->dev), host); + if (ret) + goto host_remove; + + pr_info("%s at 0x%08lx irq %d\n", mmc_hostname(host->mmc), + (unsigned long)host->ctl, irq); + + return 0; + +host_remove: + tmio_mmc_host_remove(host); +host_free: + tmio_mmc_host_free(host); +cell_disable: + if (cell->disable) + cell->disable(pdev); +out: + return ret; +} + +static int tmio_mmc_remove(struct platform_device *pdev) +{ + const struct mfd_cell *cell = mfd_get_cell(pdev); + struct tmio_mmc_host *host = platform_get_drvdata(pdev); + + tmio_mmc_host_remove(host); + if (cell->disable) + cell->disable(pdev); + + return 0; +} + +/* ------------------- device registration ----------------------- */ + +static const struct dev_pm_ops tmio_mmc_dev_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(tmio_mmc_suspend, tmio_mmc_resume) + SET_RUNTIME_PM_OPS(tmio_mmc_host_runtime_suspend, + tmio_mmc_host_runtime_resume, NULL) +}; + +static struct platform_driver tmio_mmc_driver = { + .driver = { + .name = "tmio-mmc", + .pm = &tmio_mmc_dev_pm_ops, + }, + .probe = tmio_mmc_probe, + .remove = tmio_mmc_remove, +}; + +module_platform_driver(tmio_mmc_driver); + +MODULE_DESCRIPTION("Toshiba TMIO SD/MMC driver"); +MODULE_AUTHOR("Ian Molton <spyro@f2s.com>"); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:tmio-mmc"); diff --git a/drivers/mmc/host/renesas_sdhi_core.c b/drivers/mmc/host/tmio_mmc_sdhi.c similarity index 99% rename from drivers/mmc/host/renesas_sdhi_core.c rename to drivers/mmc/host/tmio_mmc_sdhi.c index 45c015da..a440f5d 100644 --- a/drivers/mmc/host/renesas_sdhi_core.c +++ b/drivers/mmc/host/tmio_mmc_sdhi.c @@ -36,7 +36,7 @@ #include <linux/pinctrl/pinctrl-state.h> #include <linux/regulator/consumer.h> -#include "renesas_sdhi.h" +#include "tmio_mmc_sdhi.h" #include "tmio_mmc.h" #define HOST_MODE 0xe4 diff --git a/drivers/mmc/host/renesas_sdhi.h b/drivers/mmc/host/tmio_mmc_sdhi.h similarity index 100% rename from drivers/mmc/host/renesas_sdhi.h rename to drivers/mmc/host/tmio_mmc_sdhi.h diff --git a/drivers/mmc/host/renesas_sdhi_internal_dmac.c b/drivers/mmc/host/tmio_mmc_sdhi_internal_dmac.c similarity index 99% rename from drivers/mmc/host/renesas_sdhi_internal_dmac.c rename to drivers/mmc/host/tmio_mmc_sdhi_internal_dmac.c index d032bd6..2757a6b 100644 --- a/drivers/mmc/host/renesas_sdhi_internal_dmac.c +++ b/drivers/mmc/host/tmio_mmc_sdhi_internal_dmac.c @@ -21,7 +21,7 @@ #include <linux/scatterlist.h> #include <linux/sys_soc.h> -#include "renesas_sdhi.h" +#include "tmio_mmc_sdhi.h" #include "tmio_mmc.h" #define DM_CM_DTRAN_MODE 0x820 diff --git a/drivers/mmc/host/renesas_sdhi_sys_dmac.c b/drivers/mmc/host/tmio_mmc_sdhi_sys_dmac.c similarity index 99% rename from drivers/mmc/host/renesas_sdhi_sys_dmac.c rename to drivers/mmc/host/tmio_mmc_sdhi_sys_dmac.c index 4bb46c4..c21fca1 100644 --- a/drivers/mmc/host/renesas_sdhi_sys_dmac.c +++ b/drivers/mmc/host/tmio_mmc_sdhi_sys_dmac.c @@ -23,7 +23,7 @@ #include <linux/scatterlist.h> #include <linux/sys_soc.h> -#include "renesas_sdhi.h" +#include "tmio_mmc_sdhi.h" #include "tmio_mmc.h" #define TMIO_MMC_MIN_DMA_LEN 8

[1/2] mmc: tmio: rename files and CONFIG options to have the same prefix

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